From 9e3c08db40b8916968b9f30096c7be3f00ce9647 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 21 Apr 2024 13:44:51 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- gfx/skia/LICENSE | 27 + gfx/skia/README | 3 + gfx/skia/README_COMMITTING | 10 + gfx/skia/README_MOZILLA | 33 + gfx/skia/generate_mozbuild.py | 416 ++ gfx/skia/moz.build | 620 +++ gfx/skia/patches/README | 2 + ...g-687189-Implement-SkPaint-getPosTextPath.patch | 66 + ...ug-777614-Re-add-our-SkUserConfig.h-r-nrc.patch | 34 + ...Skia-cross-compilation-for-Windows-fails-.patch | 26 + ...Remove-unused-find_from_uniqueID-function.patch | 38 + ...8366-Dont-invalidate-all-radial-gradients.patch | 30 + ...Re-apply-Bug-795549-Move-TileProc-functio.patch | 50 + .../archive/0003-SkUserConfig-for-Mozilla.patch | 39 + ...4-Bug-722011-Fix-trailing-commas-in-enums.patch | 280 + ...Re-apply-bug-719872-Fix-crash-on-Android-.patch | 684 +++ .../0005-Bug-731384-Fix-clang-SK_OVERRIDE.patch | 36 + ...Add-a-new-SkFontHost-that-takes-a-cairo_s.patch | 449 ++ ...Re-apply-bug-687188-Expand-the-gradient-c.patch | 198 + ...0006-Bug-751814-ARM-EDSP-ARMv6-Skia-fixes.patch | 147 + ...Re-apply-Bug-777614-Add-our-SkUserConfig..patch | 27 + .../0007-Bug-719872-Old-Android-FontHost.patch | 702 +++ ...Re-apply-bug-687188-Expand-the-gradient-c.patch | 168 + .../0008-Bug-687188-Skia-radial-gradients.patch | 173 + ...Re-apply-759683-Handle-compilers-that-don.patch | 35 + .../archive/0009-Bug-755869-FreeBSD-Hurd.patch | 28 + ...Re-apply-759683-Handle-compilers-that-don.patch | 40 + ...Re-apply-bug-751418-Add-our-own-GrUserCon.patch | 23 + .../patches/archive/0010-Bug-689069-ARM-Opts.patch | 36 + ...6892-Add-new-blending-modes-to-SkXfermode.patch | 698 +++ ...Re-apply-bug-817356-Patch-Skia-to-recogni.patch | 22 + .../archive/0011-Bug-719575-Fix-clang-build.patch | 28 + ...no-anon-namespace-around-SkNO_RETURN_HINT.patch | 31 + ...18-Add-our-own-GrUserConfig-r-mattwoodrow.patch | 29 + .../0012-Bug-759683-make-ssse3-conditional.patch | 22 + ...Fix-compile-error-on-gcc-in-Skia-GL-r-mat.patch | 26 + .../patches/archive/0013-Bug-761890-fonts.patch | 162 + .../archive/0014-Bug-765038-Fix-clang-build.patch | 29 + .../patches/archive/0015-Bug-766017-warnings.patch | 865 +++ .../archive/0016-Bug-718849-Radial-gradients.patch | 400 ++ .../0017-Bug-740194-SkMemory-mozalloc.patch | 73 + .../archive/0018-Bug-817356-PPC-defines.patch | 14 + ...Re-apply-bug-795538-Ensure-we-use-the-cor.patch | 39 + ...90539-Fix-SK_COMPILE_ASSERT-build-warning.patch | 39 + .../0024-Bug-887318-fix-bgra-readback.patch | 217 + ...-Bug-896049-Add-default-Value-SK_OVERRIDE.patch | 26 + .../archive/0026-Bug-901208-Fix-ARM-v4t.patch | 83 + ...030-Bug-939629-Add-missing-include-guards.patch | 94 + .../0031-Bug-945588-Add-include-guard.patch | 39 + ...32-Bug-974900-More-missing-include-guards.patch | 148 + .../0033-Bug-974900-undef-interface-windows.patch | 27 + gfx/skia/patches/archive/SkPostConfig.patch | 32 + gfx/skia/patches/archive/arm-fixes.patch | 191 + gfx/skia/patches/archive/arm-opts.patch | 41 + .../patches/archive/fix-comma-end-enum-list.patch | 380 ++ gfx/skia/patches/archive/fix-gradient-clamp.patch | 211 + gfx/skia/patches/archive/getpostextpath.patch | 70 + gfx/skia/patches/archive/mingw-fix.patch | 57 + gfx/skia/patches/archive/new-aa.patch | 22 + .../patches/archive/old-android-fonthost.patch | 530 ++ gfx/skia/patches/archive/radial-gradients.patch | 25 + .../patches/archive/skia_restrict_problem.patch | 461 ++ .../patches/archive/uninitialized-margin.patch | 22 + gfx/skia/patches/archive/user-config.patch | 40 + gfx/skia/skia/include/codec/SkAndroidCodec.h | 297 + gfx/skia/skia/include/codec/SkCodec.h | 1015 ++++ gfx/skia/skia/include/codec/SkCodecAnimation.h | 61 + gfx/skia/skia/include/codec/SkEncodedImageFormat.h | 36 + gfx/skia/skia/include/codec/SkEncodedOrigin.h | 54 + gfx/skia/skia/include/codec/SkPngChunkReader.h | 45 + gfx/skia/skia/include/config/SkUserConfig.h | 152 + gfx/skia/skia/include/core/SkAlphaType.h | 45 + gfx/skia/skia/include/core/SkAnnotation.h | 52 + gfx/skia/skia/include/core/SkBBHFactory.h | 63 + gfx/skia/skia/include/core/SkBitmap.h | 1268 +++++ gfx/skia/skia/include/core/SkBlendMode.h | 112 + gfx/skia/skia/include/core/SkBlender.h | 33 + gfx/skia/skia/include/core/SkBlurTypes.h | 20 + gfx/skia/skia/include/core/SkCanvas.h | 2632 +++++++++ .../skia/include/core/SkCanvasVirtualEnforcer.h | 61 + gfx/skia/skia/include/core/SkCapabilities.h | 44 + gfx/skia/skia/include/core/SkClipOp.h | 19 + gfx/skia/skia/include/core/SkColor.h | 447 ++ gfx/skia/skia/include/core/SkColorFilter.h | 128 + gfx/skia/skia/include/core/SkColorPriv.h | 167 + gfx/skia/skia/include/core/SkColorSpace.h | 242 + gfx/skia/skia/include/core/SkColorType.h | 67 + gfx/skia/skia/include/core/SkContourMeasure.h | 131 + gfx/skia/skia/include/core/SkCoverageMode.h | 28 + gfx/skia/skia/include/core/SkCubicMap.h | 47 + gfx/skia/skia/include/core/SkData.h | 191 + gfx/skia/skia/include/core/SkDataTable.h | 122 + gfx/skia/skia/include/core/SkDeferredDisplayList.h | 110 + .../include/core/SkDeferredDisplayListRecorder.h | 97 + gfx/skia/skia/include/core/SkDocument.h | 91 + gfx/skia/skia/include/core/SkDrawLooper.h | 135 + gfx/skia/skia/include/core/SkDrawable.h | 175 + gfx/skia/skia/include/core/SkEncodedImageFormat.h | 9 + gfx/skia/skia/include/core/SkExecutor.h | 41 + gfx/skia/skia/include/core/SkFlattenable.h | 115 + gfx/skia/skia/include/core/SkFont.h | 540 ++ gfx/skia/skia/include/core/SkFontArguments.h | 94 + gfx/skia/skia/include/core/SkFontMetrics.h | 139 + gfx/skia/skia/include/core/SkFontMgr.h | 162 + gfx/skia/skia/include/core/SkFontParameters.h | 42 + gfx/skia/skia/include/core/SkFontStyle.h | 84 + gfx/skia/skia/include/core/SkFontTypes.h | 25 + gfx/skia/skia/include/core/SkGraphics.h | 169 + gfx/skia/skia/include/core/SkICC.h | 9 + gfx/skia/skia/include/core/SkImage.h | 1575 ++++++ gfx/skia/skia/include/core/SkImageEncoder.h | 71 + gfx/skia/skia/include/core/SkImageFilter.h | 114 + gfx/skia/skia/include/core/SkImageGenerator.h | 231 + gfx/skia/skia/include/core/SkImageInfo.h | 616 +++ gfx/skia/skia/include/core/SkM44.h | 438 ++ gfx/skia/skia/include/core/SkMallocPixelRef.h | 42 + gfx/skia/skia/include/core/SkMaskFilter.h | 53 + gfx/skia/skia/include/core/SkMatrix.h | 1996 +++++++ gfx/skia/skia/include/core/SkMesh.h | 423 ++ gfx/skia/skia/include/core/SkMilestone.h | 9 + gfx/skia/skia/include/core/SkOpenTypeSVGDecoder.h | 30 + gfx/skia/skia/include/core/SkOverdrawCanvas.h | 69 + gfx/skia/skia/include/core/SkPaint.h | 695 +++ gfx/skia/skia/include/core/SkPath.h | 1890 +++++++ gfx/skia/skia/include/core/SkPathBuilder.h | 271 + gfx/skia/skia/include/core/SkPathEffect.h | 106 + gfx/skia/skia/include/core/SkPathMeasure.h | 88 + gfx/skia/skia/include/core/SkPathTypes.h | 57 + gfx/skia/skia/include/core/SkPathUtils.h | 42 + gfx/skia/skia/include/core/SkPicture.h | 278 + gfx/skia/skia/include/core/SkPictureRecorder.h | 115 + gfx/skia/skia/include/core/SkPixelRef.h | 123 + gfx/skia/skia/include/core/SkPixmap.h | 748 +++ gfx/skia/skia/include/core/SkPoint.h | 568 ++ gfx/skia/skia/include/core/SkPoint3.h | 157 + gfx/skia/skia/include/core/SkPromiseImageTexture.h | 46 + gfx/skia/skia/include/core/SkRRect.h | 516 ++ gfx/skia/skia/include/core/SkRSXform.h | 69 + .../skia/include/core/SkRasterHandleAllocator.h | 94 + gfx/skia/skia/include/core/SkRect.h | 1388 +++++ gfx/skia/skia/include/core/SkRefCnt.h | 389 ++ gfx/skia/skia/include/core/SkRegion.h | 678 +++ gfx/skia/skia/include/core/SkSamplingOptions.h | 105 + gfx/skia/skia/include/core/SkScalar.h | 173 + gfx/skia/skia/include/core/SkSerialProcs.h | 73 + gfx/skia/skia/include/core/SkShader.h | 93 + gfx/skia/skia/include/core/SkSize.h | 92 + gfx/skia/skia/include/core/SkSpan.h | 13 + gfx/skia/skia/include/core/SkStream.h | 523 ++ gfx/skia/skia/include/core/SkString.h | 291 + gfx/skia/skia/include/core/SkStrokeRec.h | 154 + gfx/skia/skia/include/core/SkSurface.h | 1199 +++++ .../skia/include/core/SkSurfaceCharacterization.h | 263 + gfx/skia/skia/include/core/SkSurfaceProps.h | 93 + 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gfx/skia/skia/include/effects/SkTableMaskFilter.h | 41 + gfx/skia/skia/include/effects/SkTrimPathEffect.h | 45 + gfx/skia/skia/include/encode/SkEncoder.h | 63 + gfx/skia/skia/include/encode/SkICC.h | 36 + gfx/skia/skia/include/encode/SkJpegEncoder.h | 137 + gfx/skia/skia/include/encode/SkPngEncoder.h | 115 + gfx/skia/skia/include/encode/SkWebpEncoder.h | 78 + gfx/skia/skia/include/gpu/GpuTypes.h | 72 + gfx/skia/skia/include/gpu/GrBackendDrawableInfo.h | 44 + gfx/skia/skia/include/gpu/GrBackendSemaphore.h | 140 + gfx/skia/skia/include/gpu/GrBackendSurface.h | 666 +++ .../include/gpu/GrBackendSurfaceMutableState.h | 26 + gfx/skia/skia/include/gpu/GrContextOptions.h | 374 ++ .../skia/include/gpu/GrContextThreadSafeProxy.h | 169 + gfx/skia/skia/include/gpu/GrDirectContext.h | 908 ++++ gfx/skia/skia/include/gpu/GrDriverBugWorkarounds.h | 53 + .../include/gpu/GrDriverBugWorkaroundsAutogen.h | 43 + gfx/skia/skia/include/gpu/GrRecordingContext.h | 286 + 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| 95 + gfx/skia/skia/src/base/SkUtils.cpp | 13 + gfx/skia/skia/src/base/SkUtils.h | 55 + gfx/skia/skia/src/base/SkVx.h | 1183 ++++ gfx/skia/skia/src/base/SkZip.h | 215 + gfx/skia/skia/src/codec/SkCodec.cpp | 972 ++++ gfx/skia/skia/src/codec/SkCodecImageGenerator.cpp | 110 + gfx/skia/skia/src/codec/SkCodecImageGenerator.h | 128 + gfx/skia/skia/src/codec/SkCodecPriv.h | 259 + gfx/skia/skia/src/codec/SkColorTable.cpp | 25 + gfx/skia/skia/src/codec/SkColorTable.h | 51 + gfx/skia/skia/src/codec/SkEncodedInfo.cpp | 30 + gfx/skia/skia/src/codec/SkFrameHolder.h | 206 + gfx/skia/skia/src/codec/SkMaskSwizzler.cpp | 575 ++ gfx/skia/skia/src/codec/SkMaskSwizzler.h | 76 + gfx/skia/skia/src/codec/SkMasks.cpp | 153 + gfx/skia/skia/src/codec/SkMasks.h | 61 + gfx/skia/skia/src/codec/SkParseEncodedOrigin.cpp | 77 + gfx/skia/skia/src/codec/SkParseEncodedOrigin.h | 19 + gfx/skia/skia/src/codec/SkPixmapUtils.cpp | 69 + gfx/skia/skia/src/codec/SkPixmapUtils.h | 61 + gfx/skia/skia/src/codec/SkSampler.cpp | 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gfx/skia/skia/src/core/SkBlitter_ARGB32.cpp | 1420 +++++ gfx/skia/skia/src/core/SkBlitter_Sprite.cpp | 228 + gfx/skia/skia/src/core/SkBlurMF.cpp | 1680 ++++++ gfx/skia/skia/src/core/SkBlurMask.cpp | 661 +++ gfx/skia/skia/src/core/SkBlurMask.h | 87 + gfx/skia/skia/src/core/SkCachedData.cpp | 177 + gfx/skia/skia/src/core/SkCachedData.h | 113 + gfx/skia/skia/src/core/SkCanvas.cpp | 3087 +++++++++++ gfx/skia/skia/src/core/SkCanvasPriv.cpp | 156 + gfx/skia/skia/src/core/SkCanvasPriv.h | 116 + gfx/skia/skia/src/core/SkCanvas_Raster.cpp | 54 + gfx/skia/skia/src/core/SkCapabilities.cpp | 30 + .../skia/src/core/SkChromeRemoteGlyphCache.cpp | 1271 +++++ gfx/skia/skia/src/core/SkClipStack.cpp | 999 ++++ gfx/skia/skia/src/core/SkClipStack.h | 507 ++ gfx/skia/skia/src/core/SkClipStackDevice.cpp | 124 + gfx/skia/skia/src/core/SkClipStackDevice.h | 49 + gfx/skia/skia/src/core/SkColor.cpp | 170 + gfx/skia/skia/src/core/SkColorFilter.cpp | 633 +++ gfx/skia/skia/src/core/SkColorFilterBase.h | 141 + gfx/skia/skia/src/core/SkColorFilterPriv.h | 34 + gfx/skia/skia/src/core/SkColorFilter_Matrix.cpp | 256 + gfx/skia/skia/src/core/SkColorSpace.cpp | 411 ++ gfx/skia/skia/src/core/SkColorSpacePriv.h | 86 + gfx/skia/skia/src/core/SkColorSpaceXformSteps.cpp | 227 + gfx/skia/skia/src/core/SkColorSpaceXformSteps.h | 57 + gfx/skia/skia/src/core/SkCompressedDataUtils.cpp | 306 ++ gfx/skia/skia/src/core/SkCompressedDataUtils.h | 51 + gfx/skia/skia/src/core/SkContourMeasure.cpp | 673 +++ gfx/skia/skia/src/core/SkConvertPixels.cpp | 253 + gfx/skia/skia/src/core/SkConvertPixels.h | 21 + gfx/skia/skia/src/core/SkCoreBlitters.h | 145 + gfx/skia/skia/src/core/SkCpu.cpp | 161 + gfx/skia/skia/src/core/SkCpu.h | 121 + gfx/skia/skia/src/core/SkCubicClipper.cpp | 156 + gfx/skia/skia/src/core/SkCubicClipper.h | 37 + gfx/skia/skia/src/core/SkCubicMap.cpp | 81 + gfx/skia/skia/src/core/SkCubicSolver.h | 60 + gfx/skia/skia/src/core/SkData.cpp | 219 + gfx/skia/skia/src/core/SkDataTable.cpp | 136 + 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237 + gfx/skia/skia/src/core/SkDraw_text.cpp | 143 + gfx/skia/skia/src/core/SkDraw_vertices.cpp | 551 ++ gfx/skia/skia/src/core/SkDrawable.cpp | 99 + gfx/skia/skia/src/core/SkEdge.cpp | 524 ++ gfx/skia/skia/src/core/SkEdge.h | 137 + gfx/skia/skia/src/core/SkEdgeBuilder.cpp | 394 ++ gfx/skia/skia/src/core/SkEdgeBuilder.h | 92 + gfx/skia/skia/src/core/SkEdgeClipper.cpp | 604 +++ gfx/skia/skia/src/core/SkEdgeClipper.h | 69 + gfx/skia/skia/src/core/SkEffectPriv.h | 29 + gfx/skia/skia/src/core/SkEnumBitMask.h | 87 + gfx/skia/skia/src/core/SkEnumerate.h | 114 + gfx/skia/skia/src/core/SkExecutor.cpp | 153 + gfx/skia/skia/src/core/SkFDot6.h | 78 + gfx/skia/skia/src/core/SkFlattenable.cpp | 157 + gfx/skia/skia/src/core/SkFont.cpp | 394 ++ gfx/skia/skia/src/core/SkFontDescriptor.cpp | 277 + gfx/skia/skia/src/core/SkFontDescriptor.h | 158 + gfx/skia/skia/src/core/SkFontMetricsPriv.cpp | 60 + gfx/skia/skia/src/core/SkFontMetricsPriv.h | 23 + gfx/skia/skia/src/core/SkFontMgr.cpp | 287 + gfx/skia/skia/src/core/SkFontMgrPriv.h | 14 + gfx/skia/skia/src/core/SkFontPriv.h | 120 + gfx/skia/skia/src/core/SkFontStream.cpp | 211 + gfx/skia/skia/src/core/SkFontStream.h | 49 + gfx/skia/skia/src/core/SkFont_serial.cpp | 117 + gfx/skia/skia/src/core/SkFuzzLogging.h | 23 + gfx/skia/skia/src/core/SkGaussFilter.cpp | 109 + gfx/skia/skia/src/core/SkGaussFilter.h | 34 + gfx/skia/skia/src/core/SkGeometry.cpp | 1780 ++++++ gfx/skia/skia/src/core/SkGeometry.h | 543 ++ .../skia/src/core/SkGlobalInitialization_core.cpp | 18 + gfx/skia/skia/src/core/SkGlyph.cpp | 700 +++ gfx/skia/skia/src/core/SkGlyph.h | 639 +++ gfx/skia/skia/src/core/SkGlyphRunPainter.cpp | 366 ++ gfx/skia/skia/src/core/SkGlyphRunPainter.h | 52 + gfx/skia/skia/src/core/SkGpuBlurUtils.cpp | 1039 ++++ gfx/skia/skia/src/core/SkGpuBlurUtils.h | 113 + gfx/skia/skia/src/core/SkGraphics.cpp | 100 + gfx/skia/skia/src/core/SkIDChangeListener.cpp | 70 + gfx/skia/skia/src/core/SkIPoint16.h | 57 + gfx/skia/skia/src/core/SkImageFilter.cpp | 682 +++ gfx/skia/skia/src/core/SkImageFilterCache.cpp | 164 + gfx/skia/skia/src/core/SkImageFilterCache.h | 73 + gfx/skia/skia/src/core/SkImageFilterTypes.cpp | 430 ++ gfx/skia/skia/src/core/SkImageFilterTypes.h | 799 +++ gfx/skia/skia/src/core/SkImageFilter_Base.h | 492 ++ gfx/skia/skia/src/core/SkImageGenerator.cpp | 123 + gfx/skia/skia/src/core/SkImageInfo.cpp | 236 + gfx/skia/skia/src/core/SkImageInfoPriv.h | 203 + gfx/skia/skia/src/core/SkImagePriv.h | 62 + gfx/skia/skia/src/core/SkLRUCache.h | 130 + gfx/skia/skia/src/core/SkLatticeIter.cpp | 302 ++ gfx/skia/skia/src/core/SkLatticeIter.h | 77 + gfx/skia/skia/src/core/SkLineClipper.cpp | 282 + gfx/skia/skia/src/core/SkLineClipper.h | 45 + .../skia/src/core/SkLocalMatrixImageFilter.cpp | 73 + gfx/skia/skia/src/core/SkLocalMatrixImageFilter.h | 42 + gfx/skia/skia/src/core/SkM44.cpp | 356 ++ gfx/skia/skia/src/core/SkMD5.cpp | 261 + gfx/skia/skia/src/core/SkMD5.h | 45 + gfx/skia/skia/src/core/SkMallocPixelRef.cpp | 77 + gfx/skia/skia/src/core/SkMask.cpp | 118 + gfx/skia/skia/src/core/SkMask.h | 243 + gfx/skia/skia/src/core/SkMaskBlurFilter.cpp | 1054 ++++ gfx/skia/skia/src/core/SkMaskBlurFilter.h | 37 + gfx/skia/skia/src/core/SkMaskCache.cpp | 185 + gfx/skia/skia/src/core/SkMaskCache.h | 44 + gfx/skia/skia/src/core/SkMaskFilter.cpp | 414 ++ gfx/skia/skia/src/core/SkMaskFilterBase.h | 266 + gfx/skia/skia/src/core/SkMaskGamma.cpp | 125 + gfx/skia/skia/src/core/SkMaskGamma.h | 232 + gfx/skia/skia/src/core/SkMatrix.cpp | 1881 +++++++ gfx/skia/skia/src/core/SkMatrixInvert.cpp | 144 + gfx/skia/skia/src/core/SkMatrixInvert.h | 24 + gfx/skia/skia/src/core/SkMatrixPriv.h | 201 + gfx/skia/skia/src/core/SkMatrixProvider.h | 68 + gfx/skia/skia/src/core/SkMatrixUtils.h | 39 + gfx/skia/skia/src/core/SkMesh.cpp | 925 ++++ gfx/skia/skia/src/core/SkMeshPriv.h | 250 + gfx/skia/skia/src/core/SkMessageBus.h | 153 + gfx/skia/skia/src/core/SkMipmap.cpp | 895 ++++ gfx/skia/skia/src/core/SkMipmap.h | 96 + gfx/skia/skia/src/core/SkMipmapAccessor.cpp | 110 + gfx/skia/skia/src/core/SkMipmapAccessor.h | 53 + gfx/skia/skia/src/core/SkMipmapBuilder.cpp | 37 + gfx/skia/skia/src/core/SkMipmapBuilder.h | 40 + gfx/skia/skia/src/core/SkModeColorFilter.cpp | 245 + gfx/skia/skia/src/core/SkNextID.h | 21 + gfx/skia/skia/src/core/SkOSFile.h | 101 + gfx/skia/skia/src/core/SkOpts.cpp | 153 + gfx/skia/skia/src/core/SkOpts.h | 139 + gfx/skia/skia/src/core/SkOpts_erms.cpp | 122 + gfx/skia/skia/src/core/SkOrderedReadBuffer.h | 9 + gfx/skia/skia/src/core/SkOverdrawCanvas.cpp | 259 + gfx/skia/skia/src/core/SkPaint.cpp | 294 + gfx/skia/skia/src/core/SkPaintDefaults.h | 31 + gfx/skia/skia/src/core/SkPaintPriv.cpp | 274 + gfx/skia/skia/src/core/SkPaintPriv.h | 63 + gfx/skia/skia/src/core/SkPath.cpp | 3918 ++++++++++++++ gfx/skia/skia/src/core/SkPathBuilder.cpp | 867 +++ gfx/skia/skia/src/core/SkPathEffect.cpp | 214 + gfx/skia/skia/src/core/SkPathEffectBase.h | 146 + gfx/skia/skia/src/core/SkPathMakers.h | 88 + gfx/skia/skia/src/core/SkPathMeasure.cpp | 53 + gfx/skia/skia/src/core/SkPathMeasurePriv.h | 29 + gfx/skia/skia/src/core/SkPathPriv.h | 529 ++ gfx/skia/skia/src/core/SkPathRef.cpp | 689 +++ gfx/skia/skia/src/core/SkPathUtils.cpp | 87 + gfx/skia/skia/src/core/SkPath_serial.cpp | 297 + gfx/skia/skia/src/core/SkPicture.cpp | 352 ++ gfx/skia/skia/src/core/SkPictureData.cpp | 601 +++ gfx/skia/skia/src/core/SkPictureData.h | 196 + gfx/skia/skia/src/core/SkPictureFlat.cpp | 22 + gfx/skia/skia/src/core/SkPictureFlat.h | 223 + gfx/skia/skia/src/core/SkPictureImageGenerator.cpp | 170 + gfx/skia/skia/src/core/SkPicturePlayback.cpp | 739 +++ gfx/skia/skia/src/core/SkPicturePlayback.h | 67 + gfx/skia/skia/src/core/SkPicturePriv.h | 156 + gfx/skia/skia/src/core/SkPictureRecord.cpp | 953 ++++ gfx/skia/skia/src/core/SkPictureRecord.h | 271 + gfx/skia/skia/src/core/SkPictureRecorder.cpp | 145 + gfx/skia/skia/src/core/SkPixelRef.cpp | 149 + gfx/skia/skia/src/core/SkPixelRefPriv.h | 27 + gfx/skia/skia/src/core/SkPixmap.cpp | 745 +++ gfx/skia/skia/src/core/SkPixmapDraw.cpp | 87 + gfx/skia/skia/src/core/SkPoint.cpp | 169 + gfx/skia/skia/src/core/SkPoint3.cpp | 76 + gfx/skia/skia/src/core/SkPointPriv.h | 127 + gfx/skia/skia/src/core/SkPromiseImageTexture.cpp | 19 + gfx/skia/skia/src/core/SkPtrRecorder.cpp | 73 + gfx/skia/skia/src/core/SkPtrRecorder.h | 171 + gfx/skia/skia/src/core/SkQuadClipper.cpp | 117 + gfx/skia/skia/src/core/SkQuadClipper.h | 69 + gfx/skia/skia/src/core/SkRRect.cpp | 917 ++++ gfx/skia/skia/src/core/SkRRectPriv.h | 67 + gfx/skia/skia/src/core/SkRSXform.cpp | 45 + gfx/skia/skia/src/core/SkRTree.cpp | 168 + gfx/skia/skia/src/core/SkRTree.h | 82 + gfx/skia/skia/src/core/SkRasterClip.cpp | 328 ++ gfx/skia/skia/src/core/SkRasterClip.h | 185 + gfx/skia/skia/src/core/SkRasterClipStack.h | 123 + gfx/skia/skia/src/core/SkRasterPipeline.cpp | 499 ++ gfx/skia/skia/src/core/SkRasterPipeline.h | 158 + gfx/skia/skia/src/core/SkRasterPipelineBlitter.cpp | 607 +++ .../skia/src/core/SkRasterPipelineOpContexts.h | 205 + gfx/skia/skia/src/core/SkRasterPipelineOpList.h | 195 + gfx/skia/skia/src/core/SkReadBuffer.cpp | 504 ++ gfx/skia/skia/src/core/SkReadBuffer.h | 264 + gfx/skia/skia/src/core/SkReadPixelsRec.cpp | 42 + gfx/skia/skia/src/core/SkReadPixelsRec.h | 52 + gfx/skia/skia/src/core/SkRecord.cpp | 37 + gfx/skia/skia/src/core/SkRecord.h | 181 + gfx/skia/skia/src/core/SkRecordDraw.cpp | 590 ++ gfx/skia/skia/src/core/SkRecordDraw.h | 83 + gfx/skia/skia/src/core/SkRecordOpts.cpp | 314 ++ gfx/skia/skia/src/core/SkRecordOpts.h | 32 + gfx/skia/skia/src/core/SkRecordPattern.h | 177 + gfx/skia/skia/src/core/SkRecordedDrawable.cpp | 104 + gfx/skia/skia/src/core/SkRecordedDrawable.h | 42 + gfx/skia/skia/src/core/SkRecorder.cpp | 423 ++ gfx/skia/skia/src/core/SkRecorder.h | 179 + gfx/skia/skia/src/core/SkRecords.cpp | 24 + gfx/skia/skia/src/core/SkRecords.h | 362 ++ gfx/skia/skia/src/core/SkRect.cpp | 309 ++ gfx/skia/skia/src/core/SkRectPriv.h | 99 + gfx/skia/skia/src/core/SkRegion.cpp | 1584 ++++++ gfx/skia/skia/src/core/SkRegionPriv.h | 261 + gfx/skia/skia/src/core/SkRegion_path.cpp | 586 ++ gfx/skia/skia/src/core/SkResourceCache.cpp | 614 +++ gfx/skia/skia/src/core/SkResourceCache.h | 293 + gfx/skia/skia/src/core/SkRuntimeEffect.cpp | 2016 +++++++ gfx/skia/skia/src/core/SkRuntimeEffectPriv.h | 176 + gfx/skia/skia/src/core/SkSLTypeShared.cpp | 213 + gfx/skia/skia/src/core/SkSLTypeShared.h | 242 + gfx/skia/skia/src/core/SkSafeRange.h | 49 + gfx/skia/skia/src/core/SkSamplingPriv.h | 77 + gfx/skia/skia/src/core/SkScalar.cpp | 37 + gfx/skia/skia/src/core/SkScaleToSides.h | 64 + gfx/skia/skia/src/core/SkScalerContext.cpp | 1284 +++++ gfx/skia/skia/src/core/SkScalerContext.h | 464 ++ gfx/skia/skia/src/core/SkScan.cpp | 111 + gfx/skia/skia/src/core/SkScan.h | 142 + gfx/skia/skia/src/core/SkScanPriv.h | 83 + gfx/skia/skia/src/core/SkScan_AAAPath.cpp | 2033 +++++++ gfx/skia/skia/src/core/SkScan_AntiPath.cpp | 208 + gfx/skia/skia/src/core/SkScan_Antihair.cpp | 1014 ++++ gfx/skia/skia/src/core/SkScan_Hairline.cpp | 743 +++ gfx/skia/skia/src/core/SkScan_Path.cpp | 784 +++ gfx/skia/skia/src/core/SkScan_SAAPath.cpp | 611 +++ gfx/skia/skia/src/core/SkSharedMutex.cpp | 368 ++ gfx/skia/skia/src/core/SkSharedMutex.h | 102 + gfx/skia/skia/src/core/SkSpecialImage.cpp | 458 ++ gfx/skia/skia/src/core/SkSpecialImage.h | 263 + gfx/skia/skia/src/core/SkSpecialSurface.cpp | 138 + gfx/skia/skia/src/core/SkSpecialSurface.h | 101 + gfx/skia/skia/src/core/SkSpinlock.cpp | 50 + gfx/skia/skia/src/core/SkSpriteBlitter.h | 47 + gfx/skia/skia/src/core/SkSpriteBlitter_ARGB32.cpp | 120 + gfx/skia/skia/src/core/SkStream.cpp | 986 ++++ gfx/skia/skia/src/core/SkStreamPriv.h | 50 + gfx/skia/skia/src/core/SkStrike.cpp | 456 ++ gfx/skia/skia/src/core/SkStrike.h | 205 + gfx/skia/skia/src/core/SkStrikeCache.cpp | 326 ++ gfx/skia/skia/src/core/SkStrikeCache.h | 108 + gfx/skia/skia/src/core/SkStrikeSpec.cpp | 309 ++ gfx/skia/skia/src/core/SkStrikeSpec.h | 178 + gfx/skia/skia/src/core/SkString.cpp | 630 +++ gfx/skia/skia/src/core/SkStringUtils.cpp | 115 + gfx/skia/skia/src/core/SkStringUtils.h | 62 + gfx/skia/skia/src/core/SkStroke.cpp | 1618 ++++++ gfx/skia/skia/src/core/SkStroke.h | 78 + gfx/skia/skia/src/core/SkStrokeRec.cpp | 172 + gfx/skia/skia/src/core/SkStrokerPriv.cpp | 235 + gfx/skia/skia/src/core/SkStrokerPriv.h | 43 + .../skia/src/core/SkSurfaceCharacterization.cpp | 182 + gfx/skia/skia/src/core/SkSurfacePriv.h | 23 + gfx/skia/skia/src/core/SkSwizzle.cpp | 14 + gfx/skia/skia/src/core/SkSwizzlePriv.h | 36 + gfx/skia/skia/src/core/SkTDynamicHash.h | 58 + gfx/skia/skia/src/core/SkTHash.h | 591 ++ gfx/skia/skia/src/core/SkTMultiMap.h | 187 + gfx/skia/skia/src/core/SkTaskGroup.cpp | 53 + gfx/skia/skia/src/core/SkTaskGroup.h | 48 + gfx/skia/skia/src/core/SkTextBlob.cpp | 1009 ++++ gfx/skia/skia/src/core/SkTextBlobPriv.h | 261 + gfx/skia/skia/src/core/SkTextBlobTrace.cpp | 119 + gfx/skia/skia/src/core/SkTextBlobTrace.h | 49 + gfx/skia/skia/src/core/SkTextFormatParams.h | 31 + gfx/skia/skia/src/core/SkTime.cpp | 89 + gfx/skia/skia/src/core/SkTraceEvent.h | 419 ++ gfx/skia/skia/src/core/SkTraceEventCommon.h | 557 ++ gfx/skia/skia/src/core/SkTypeface.cpp | 578 ++ gfx/skia/skia/src/core/SkTypefaceCache.cpp | 115 + gfx/skia/skia/src/core/SkTypefaceCache.h | 74 + gfx/skia/skia/src/core/SkTypeface_remote.cpp | 158 + gfx/skia/skia/src/core/SkTypeface_remote.h | 175 + gfx/skia/skia/src/core/SkUnPreMultiply.cpp | 79 + gfx/skia/skia/src/core/SkVM.cpp | 4117 ++++++++++++++ gfx/skia/skia/src/core/SkVM.h | 1369 +++++ gfx/skia/skia/src/core/SkVMBlitter.cpp | 815 +++ gfx/skia/skia/src/core/SkVMBlitter.h | 113 + gfx/skia/skia/src/core/SkVM_fwd.h | 23 + gfx/skia/skia/src/core/SkValidationUtils.h | 36 + gfx/skia/skia/src/core/SkVertState.cpp | 106 + gfx/skia/skia/src/core/SkVertState.h | 58 + gfx/skia/skia/src/core/SkVertices.cpp | 338 ++ gfx/skia/skia/src/core/SkVerticesPriv.h | 62 + gfx/skia/skia/src/core/SkWriteBuffer.cpp | 283 + gfx/skia/skia/src/core/SkWriteBuffer.h | 178 + gfx/skia/skia/src/core/SkWritePixelsRec.cpp | 43 + gfx/skia/skia/src/core/SkWritePixelsRec.h | 52 + gfx/skia/skia/src/core/SkWriter32.cpp | 76 + gfx/skia/skia/src/core/SkWriter32.h | 279 + gfx/skia/skia/src/core/SkXfermode.cpp | 172 + .../skia/src/core/SkXfermodeInterpretation.cpp | 50 + gfx/skia/skia/src/core/SkXfermodeInterpretation.h | 30 + gfx/skia/skia/src/core/SkXfermodePriv.h | 62 + gfx/skia/skia/src/core/SkYUVAInfo.cpp | 376 ++ gfx/skia/skia/src/core/SkYUVAInfoLocation.h | 63 + gfx/skia/skia/src/core/SkYUVAPixmaps.cpp | 297 + gfx/skia/skia/src/core/SkYUVMath.cpp | 339 ++ gfx/skia/skia/src/core/SkYUVMath.h | 19 + gfx/skia/skia/src/core/SkYUVPlanesCache.cpp | 93 + gfx/skia/skia/src/core/SkYUVPlanesCache.h | 38 + gfx/skia/skia/src/effects/Sk1DPathEffect.cpp | 259 + gfx/skia/skia/src/effects/Sk2DPathEffect.cpp | 223 + gfx/skia/skia/src/effects/SkBlenders.cpp | 78 + gfx/skia/skia/src/effects/SkColorMatrix.cpp | 116 + gfx/skia/skia/src/effects/SkColorMatrixFilter.cpp | 43 + gfx/skia/skia/src/effects/SkCornerPathEffect.cpp | 187 + gfx/skia/skia/src/effects/SkDashImpl.h | 49 + gfx/skia/skia/src/effects/SkDashPathEffect.cpp | 413 ++ gfx/skia/skia/src/effects/SkDiscretePathEffect.cpp | 191 + gfx/skia/skia/src/effects/SkEmbossMask.cpp | 121 + gfx/skia/skia/src/effects/SkEmbossMask.h | 21 + gfx/skia/skia/src/effects/SkEmbossMaskFilter.cpp | 150 + gfx/skia/skia/src/effects/SkEmbossMaskFilter.h | 61 + gfx/skia/skia/src/effects/SkHighContrastFilter.cpp | 104 + gfx/skia/skia/src/effects/SkLayerDrawLooper.cpp | 339 ++ gfx/skia/skia/src/effects/SkLumaColorFilter.cpp | 36 + gfx/skia/skia/src/effects/SkOpPE.h | 102 + gfx/skia/skia/src/effects/SkOpPathEffect.cpp | 242 + .../skia/src/effects/SkOverdrawColorFilter.cpp | 57 + gfx/skia/skia/src/effects/SkShaderMaskFilter.cpp | 156 + gfx/skia/skia/src/effects/SkTableColorFilter.cpp | 344 ++ gfx/skia/skia/src/effects/SkTableMaskFilter.cpp | 186 + gfx/skia/skia/src/effects/SkTrimPE.h | 39 + gfx/skia/skia/src/effects/SkTrimPathEffect.cpp | 149 + .../imagefilters/SkAlphaThresholdImageFilter.cpp | 334 ++ .../imagefilters/SkArithmeticImageFilter.cpp | 497 ++ .../effects/imagefilters/SkBlendImageFilter.cpp | 351 ++ .../src/effects/imagefilters/SkBlurImageFilter.cpp | 1038 ++++ .../imagefilters/SkColorFilterImageFilter.cpp | 180 + .../effects/imagefilters/SkComposeImageFilter.cpp | 141 + .../src/effects/imagefilters/SkCropImageFilter.cpp | 173 + .../src/effects/imagefilters/SkCropImageFilter.h | 20 + .../imagefilters/SkDisplacementMapImageFilter.cpp | 600 +++ .../imagefilters/SkDropShadowImageFilter.cpp | 205 + .../effects/imagefilters/SkImageImageFilter.cpp | 183 + .../effects/imagefilters/SkLightingImageFilter.cpp | 2190 ++++++++ .../imagefilters/SkMagnifierImageFilter.cpp | 296 + .../SkMatrixConvolutionImageFilter.cpp | 529 ++ .../imagefilters/SkMatrixTransformImageFilter.cpp | 184 + .../effects/imagefilters/SkMergeImageFilter.cpp | 130 + .../imagefilters/SkMorphologyImageFilter.cpp | 768 +++ .../effects/imagefilters/SkPictureImageFilter.cpp | 150 + .../effects/imagefilters/SkRuntimeImageFilter.cpp | 284 + .../effects/imagefilters/SkRuntimeImageFilter.h | 22 + .../effects/imagefilters/SkShaderImageFilter.cpp | 135 + .../src/effects/imagefilters/SkTileImageFilter.cpp | 198 + gfx/skia/skia/src/encode/SkEncoder.cpp | 29 + gfx/skia/skia/src/encode/SkICC.cpp | 762 +++ gfx/skia/skia/src/encode/SkICCPriv.h | 63 + gfx/skia/skia/src/encode/SkImageEncoder.cpp | 110 + gfx/skia/skia/src/encode/SkImageEncoderFns.h | 213 + gfx/skia/skia/src/encode/SkImageEncoderPriv.h | 51 + gfx/skia/skia/src/encode/SkJPEGWriteUtility.cpp | 79 + gfx/skia/skia/src/encode/SkJPEGWriteUtility.h | 42 + gfx/skia/skia/src/encode/SkJpegEncoder.cpp | 419 ++ gfx/skia/skia/src/encode/SkJpegGainmapEncoder.cpp | 413 ++ gfx/skia/skia/src/encode/SkPngEncoder.cpp | 493 ++ gfx/skia/skia/src/encode/SkWebpEncoder.cpp | 249 + gfx/skia/skia/src/fonts/SkFontMgr_indirect.cpp | 185 + gfx/skia/skia/src/fonts/SkRemotableFontMgr.cpp | 23 + gfx/skia/skia/src/image/SkImage.cpp | 540 ++ .../skia/src/image/SkImage_AndroidFactories.cpp | 201 + gfx/skia/skia/src/image/SkImage_Base.cpp | 367 ++ gfx/skia/skia/src/image/SkImage_Base.h | 302 ++ gfx/skia/skia/src/image/SkImage_Gpu.cpp | 821 +++ gfx/skia/skia/src/image/SkImage_Gpu.h | 179 + gfx/skia/skia/src/image/SkImage_GpuBase.cpp | 360 ++ gfx/skia/skia/src/image/SkImage_GpuBase.h | 90 + gfx/skia/skia/src/image/SkImage_GpuYUVA.cpp | 440 ++ gfx/skia/skia/src/image/SkImage_GpuYUVA.h | 105 + gfx/skia/skia/src/image/SkImage_Lazy.cpp | 689 +++ gfx/skia/skia/src/image/SkImage_Lazy.h | 152 + gfx/skia/skia/src/image/SkImage_Raster.cpp | 467 ++ gfx/skia/skia/src/image/SkImage_Raster.h | 147 + gfx/skia/skia/src/image/SkRescaleAndReadPixels.cpp | 166 + gfx/skia/skia/src/image/SkRescaleAndReadPixels.h | 21 + gfx/skia/skia/src/image/SkSurface.cpp | 300 ++ gfx/skia/skia/src/image/SkSurface_Base.cpp | 169 + gfx/skia/skia/src/image/SkSurface_Base.h | 237 + gfx/skia/skia/src/image/SkSurface_Gpu.cpp | 813 +++ gfx/skia/skia/src/image/SkSurface_Gpu.h | 99 + gfx/skia/skia/src/image/SkSurface_GpuMtl.mm | 169 + gfx/skia/skia/src/image/SkSurface_Null.cpp | 52 + gfx/skia/skia/src/image/SkSurface_Raster.cpp | 199 + gfx/skia/skia/src/image/SkSurface_Raster.h | 55 + gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.cpp | 242 + gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.h | 65 + gfx/skia/skia/src/opts/SkBitmapProcState_opts.h | 545 ++ gfx/skia/skia/src/opts/SkBlitMask_opts.h | 238 + gfx/skia/skia/src/opts/SkBlitRow_opts.h | 256 + gfx/skia/skia/src/opts/SkChecksum_opts.h | 145 + gfx/skia/skia/src/opts/SkOpts_avx.cpp | 27 + gfx/skia/skia/src/opts/SkOpts_crc32.cpp | 21 + gfx/skia/skia/src/opts/SkOpts_hsw.cpp | 58 + gfx/skia/skia/src/opts/SkOpts_skx.cpp | 21 + gfx/skia/skia/src/opts/SkOpts_sse42.cpp | 21 + gfx/skia/skia/src/opts/SkOpts_ssse3.cpp | 38 + gfx/skia/skia/src/opts/SkRasterPipeline_opts.h | 5666 ++++++++++++++++++++ gfx/skia/skia/src/opts/SkSwizzler_opts.h | 1389 +++++ gfx/skia/skia/src/opts/SkUtils_opts.h | 71 + gfx/skia/skia/src/opts/SkVM_opts.h | 351 ++ gfx/skia/skia/src/opts/SkXfermode_opts.h | 137 + gfx/skia/skia/src/pathops/SkAddIntersections.cpp | 595 ++ gfx/skia/skia/src/pathops/SkAddIntersections.h | 15 + .../skia/src/pathops/SkDConicLineIntersection.cpp | 396 ++ .../skia/src/pathops/SkDCubicLineIntersection.cpp | 464 ++ gfx/skia/skia/src/pathops/SkDCubicToQuads.cpp | 45 + gfx/skia/skia/src/pathops/SkDLineIntersection.cpp | 344 ++ .../skia/src/pathops/SkDQuadLineIntersection.cpp | 478 ++ gfx/skia/skia/src/pathops/SkIntersectionHelper.h | 113 + gfx/skia/skia/src/pathops/SkIntersections.cpp | 175 + gfx/skia/skia/src/pathops/SkIntersections.h | 346 ++ gfx/skia/skia/src/pathops/SkLineParameters.h | 181 + gfx/skia/skia/src/pathops/SkOpAngle.cpp | 1156 ++++ gfx/skia/skia/src/pathops/SkOpAngle.h | 156 + gfx/skia/skia/src/pathops/SkOpBuilder.cpp | 212 + gfx/skia/skia/src/pathops/SkOpCoincidence.cpp | 1456 +++++ gfx/skia/skia/src/pathops/SkOpCoincidence.h | 307 ++ gfx/skia/skia/src/pathops/SkOpContour.cpp | 110 + gfx/skia/skia/src/pathops/SkOpContour.h | 464 ++ gfx/skia/skia/src/pathops/SkOpCubicHull.cpp | 155 + gfx/skia/skia/src/pathops/SkOpEdgeBuilder.cpp | 360 ++ gfx/skia/skia/src/pathops/SkOpEdgeBuilder.h | 83 + gfx/skia/skia/src/pathops/SkOpSegment.cpp | 1787 ++++++ gfx/skia/skia/src/pathops/SkOpSegment.h | 466 ++ gfx/skia/skia/src/pathops/SkOpSpan.cpp | 490 ++ gfx/skia/skia/src/pathops/SkOpSpan.h | 578 ++ gfx/skia/skia/src/pathops/SkPathOpsAsWinding.cpp | 457 ++ gfx/skia/skia/src/pathops/SkPathOpsBounds.h | 65 + gfx/skia/skia/src/pathops/SkPathOpsCommon.cpp | 338 ++ gfx/skia/skia/src/pathops/SkPathOpsCommon.h | 36 + gfx/skia/skia/src/pathops/SkPathOpsConic.cpp | 197 + gfx/skia/skia/src/pathops/SkPathOpsConic.h | 206 + gfx/skia/skia/src/pathops/SkPathOpsCubic.cpp | 763 +++ gfx/skia/skia/src/pathops/SkPathOpsCubic.h | 252 + gfx/skia/skia/src/pathops/SkPathOpsCurve.cpp | 143 + gfx/skia/skia/src/pathops/SkPathOpsCurve.h | 427 ++ gfx/skia/skia/src/pathops/SkPathOpsDebug.cpp | 3096 +++++++++++ gfx/skia/skia/src/pathops/SkPathOpsDebug.h | 453 ++ gfx/skia/skia/src/pathops/SkPathOpsLine.cpp | 154 + gfx/skia/skia/src/pathops/SkPathOpsLine.h | 41 + gfx/skia/skia/src/pathops/SkPathOpsOp.cpp | 395 ++ gfx/skia/skia/src/pathops/SkPathOpsPoint.h | 281 + gfx/skia/skia/src/pathops/SkPathOpsQuad.cpp | 423 ++ gfx/skia/skia/src/pathops/SkPathOpsQuad.h | 196 + gfx/skia/skia/src/pathops/SkPathOpsRect.cpp | 67 + gfx/skia/skia/src/pathops/SkPathOpsRect.h | 84 + gfx/skia/skia/src/pathops/SkPathOpsSimplify.cpp | 236 + gfx/skia/skia/src/pathops/SkPathOpsTCurve.h | 49 + gfx/skia/skia/src/pathops/SkPathOpsTSect.cpp | 2149 ++++++++ gfx/skia/skia/src/pathops/SkPathOpsTSect.h | 376 ++ gfx/skia/skia/src/pathops/SkPathOpsTightBounds.cpp | 83 + gfx/skia/skia/src/pathops/SkPathOpsTypes.cpp | 226 + gfx/skia/skia/src/pathops/SkPathOpsTypes.h | 607 +++ gfx/skia/skia/src/pathops/SkPathOpsWinding.cpp | 441 ++ gfx/skia/skia/src/pathops/SkPathWriter.cpp | 434 ++ gfx/skia/skia/src/pathops/SkPathWriter.h | 56 + gfx/skia/skia/src/pathops/SkReduceOrder.cpp | 290 + gfx/skia/skia/src/pathops/SkReduceOrder.h | 37 + gfx/skia/skia/src/pdf/SkBitmapKey.h | 22 + gfx/skia/skia/src/pdf/SkClusterator.cpp | 64 + gfx/skia/skia/src/pdf/SkClusterator.h | 47 + gfx/skia/skia/src/pdf/SkDeflate.cpp | 134 + gfx/skia/skia/src/pdf/SkDeflate.h | 53 + gfx/skia/skia/src/pdf/SkDocument_PDF_None.cpp | 22 + gfx/skia/skia/src/pdf/SkJpegInfo.cpp | 128 + gfx/skia/skia/src/pdf/SkJpegInfo.h | 25 + gfx/skia/skia/src/pdf/SkKeyedImage.cpp | 49 + gfx/skia/skia/src/pdf/SkKeyedImage.h | 46 + gfx/skia/skia/src/pdf/SkPDFBitmap.cpp | 329 ++ gfx/skia/skia/src/pdf/SkPDFBitmap.h | 22 + gfx/skia/skia/src/pdf/SkPDFDevice.cpp | 1761 ++++++ gfx/skia/skia/src/pdf/SkPDFDevice.h | 209 + gfx/skia/skia/src/pdf/SkPDFDocument.cpp | 641 +++ gfx/skia/skia/src/pdf/SkPDFDocumentPriv.h | 190 + gfx/skia/skia/src/pdf/SkPDFFont.cpp | 724 +++ gfx/skia/skia/src/pdf/SkPDFFont.h | 141 + gfx/skia/skia/src/pdf/SkPDFFormXObject.cpp | 39 + gfx/skia/skia/src/pdf/SkPDFFormXObject.h | 28 + gfx/skia/skia/src/pdf/SkPDFGlyphUse.h | 49 + gfx/skia/skia/src/pdf/SkPDFGradientShader.cpp | 1013 ++++ gfx/skia/skia/src/pdf/SkPDFGradientShader.h | 67 + gfx/skia/skia/src/pdf/SkPDFGraphicStackState.cpp | 237 + gfx/skia/skia/src/pdf/SkPDFGraphicStackState.h | 41 + gfx/skia/skia/src/pdf/SkPDFGraphicState.cpp | 142 + gfx/skia/skia/src/pdf/SkPDFGraphicState.h | 71 + .../skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.cpp | 206 + .../skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.h | 22 + gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.cpp | 220 + gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.h | 28 + gfx/skia/skia/src/pdf/SkPDFMetadata.cpp | 325 ++ gfx/skia/skia/src/pdf/SkPDFMetadata.h | 29 + gfx/skia/skia/src/pdf/SkPDFResourceDict.cpp | 96 + gfx/skia/skia/src/pdf/SkPDFResourceDict.h | 50 + gfx/skia/skia/src/pdf/SkPDFShader.cpp | 367 ++ gfx/skia/skia/src/pdf/SkPDFShader.h | 67 + gfx/skia/skia/src/pdf/SkPDFSubsetFont.cpp | 208 + gfx/skia/skia/src/pdf/SkPDFSubsetFont.h | 16 + gfx/skia/skia/src/pdf/SkPDFTag.cpp | 372 ++ gfx/skia/skia/src/pdf/SkPDFTag.h | 64 + gfx/skia/skia/src/pdf/SkPDFType1Font.cpp | 339 ++ gfx/skia/skia/src/pdf/SkPDFType1Font.h | 11 + gfx/skia/skia/src/pdf/SkPDFTypes.cpp | 602 +++ gfx/skia/skia/src/pdf/SkPDFTypes.h | 218 + gfx/skia/skia/src/pdf/SkPDFUnion.h | 112 + gfx/skia/skia/src/pdf/SkPDFUtils.cpp | 395 ++ gfx/skia/skia/src/pdf/SkPDFUtils.h | 137 + gfx/skia/skia/src/pdf/SkUUID.h | 18 + gfx/skia/skia/src/ports/SkDebug_android.cpp | 38 + gfx/skia/skia/src/ports/SkDebug_stdio.cpp | 25 + gfx/skia/skia/src/ports/SkDebug_win.cpp | 34 + .../skia/src/ports/SkDiscardableMemory_none.cpp | 14 + gfx/skia/skia/src/ports/SkFontConfigInterface.cpp | 33 + .../src/ports/SkFontConfigInterface_direct.cpp | 709 +++ .../skia/src/ports/SkFontConfigInterface_direct.h | 44 + .../ports/SkFontConfigInterface_direct_factory.cpp | 16 + gfx/skia/skia/src/ports/SkFontConfigTypeface.h | 66 + gfx/skia/skia/src/ports/SkFontHost_FreeType.cpp | 2365 ++++++++ .../skia/src/ports/SkFontHost_FreeType_common.cpp | 2091 ++++++++ .../skia/src/ports/SkFontHost_FreeType_common.h | 191 + gfx/skia/skia/src/ports/SkFontHost_cairo.cpp | 681 +++ gfx/skia/skia/src/ports/SkFontHost_win.cpp | 2356 ++++++++ .../src/ports/SkFontMgr_FontConfigInterface.cpp | 276 + .../SkFontMgr_FontConfigInterface_factory.cpp | 18 + gfx/skia/skia/src/ports/SkFontMgr_android.cpp | 508 ++ .../skia/src/ports/SkFontMgr_android_factory.cpp | 14 + .../skia/src/ports/SkFontMgr_android_parser.cpp | 846 +++ gfx/skia/skia/src/ports/SkFontMgr_android_parser.h | 216 + gfx/skia/skia/src/ports/SkFontMgr_custom.cpp | 228 + gfx/skia/skia/src/ports/SkFontMgr_custom.h | 142 + .../skia/src/ports/SkFontMgr_custom_directory.cpp | 104 + .../ports/SkFontMgr_custom_directory_factory.cpp | 21 + .../skia/src/ports/SkFontMgr_custom_embedded.cpp | 117 + .../ports/SkFontMgr_custom_embedded_factory.cpp | 17 + gfx/skia/skia/src/ports/SkFontMgr_custom_empty.cpp | 27 + .../src/ports/SkFontMgr_custom_empty_factory.cpp | 13 + .../skia/src/ports/SkFontMgr_empty_factory.cpp | 13 + gfx/skia/skia/src/ports/SkFontMgr_fontconfig.cpp | 948 ++++ .../src/ports/SkFontMgr_fontconfig_factory.cpp | 14 + gfx/skia/skia/src/ports/SkFontMgr_fuchsia.cpp | 515 ++ gfx/skia/skia/src/ports/SkFontMgr_mac_ct.cpp | 532 ++ .../skia/src/ports/SkFontMgr_mac_ct_factory.cpp | 18 + gfx/skia/skia/src/ports/SkFontMgr_win_dw.cpp | 956 ++++ .../skia/src/ports/SkFontMgr_win_dw_factory.cpp | 18 + .../src/ports/SkGlobalInitialization_default.cpp | 62 + gfx/skia/skia/src/ports/SkImageEncoder_CG.cpp | 118 + gfx/skia/skia/src/ports/SkImageEncoder_NDK.cpp | 72 + gfx/skia/skia/src/ports/SkImageEncoder_WIC.cpp | 198 + gfx/skia/skia/src/ports/SkImageGeneratorCG.cpp | 157 + gfx/skia/skia/src/ports/SkImageGeneratorNDK.cpp | 222 + gfx/skia/skia/src/ports/SkImageGeneratorWIC.cpp | 205 + gfx/skia/skia/src/ports/SkImageGenerator_none.cpp | 13 + gfx/skia/skia/src/ports/SkImageGenerator_skia.cpp | 14 + gfx/skia/skia/src/ports/SkMemory_malloc.cpp | 110 + gfx/skia/skia/src/ports/SkMemory_mozalloc.cpp | 49 + gfx/skia/skia/src/ports/SkNDKConversions.cpp | 119 + gfx/skia/skia/src/ports/SkNDKConversions.h | 31 + gfx/skia/skia/src/ports/SkOSFile_ios.h | 52 + gfx/skia/skia/src/ports/SkOSFile_posix.cpp | 220 + gfx/skia/skia/src/ports/SkOSFile_stdio.cpp | 180 + gfx/skia/skia/src/ports/SkOSFile_win.cpp | 286 + gfx/skia/skia/src/ports/SkOSLibrary.h | 15 + gfx/skia/skia/src/ports/SkOSLibrary_posix.cpp | 26 + gfx/skia/skia/src/ports/SkOSLibrary_win.cpp | 25 + .../skia/src/ports/SkRemotableFontMgr_win_dw.cpp | 472 ++ gfx/skia/skia/src/ports/SkScalerContext_mac_ct.cpp | 789 +++ gfx/skia/skia/src/ports/SkScalerContext_mac_ct.h | 112 + gfx/skia/skia/src/ports/SkScalerContext_win_dw.cpp | 1523 ++++++ gfx/skia/skia/src/ports/SkScalerContext_win_dw.h | 117 + gfx/skia/skia/src/ports/SkTypeface_mac_ct.cpp | 1541 ++++++ gfx/skia/skia/src/ports/SkTypeface_mac_ct.h | 145 + gfx/skia/skia/src/ports/SkTypeface_win_dw.cpp | 1094 ++++ gfx/skia/skia/src/ports/SkTypeface_win_dw.h | 180 + gfx/skia/skia/src/sfnt/SkIBMFamilyClass.h | 142 + gfx/skia/skia/src/sfnt/SkOTTableTypes.h | 62 + gfx/skia/skia/src/sfnt/SkOTTable_EBDT.h | 108 + gfx/skia/skia/src/sfnt/SkOTTable_EBLC.h | 150 + gfx/skia/skia/src/sfnt/SkOTTable_EBSC.h | 41 + gfx/skia/skia/src/sfnt/SkOTTable_OS_2.h | 52 + gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V0.h | 146 + gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V1.h | 515 ++ gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V2.h | 538 ++ gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V3.h | 547 ++ gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V4.h | 582 ++ gfx/skia/skia/src/sfnt/SkOTTable_OS_2_VA.h | 141 + gfx/skia/skia/src/sfnt/SkOTTable_fvar.h | 56 + gfx/skia/skia/src/sfnt/SkOTTable_gasp.h | 72 + gfx/skia/skia/src/sfnt/SkOTTable_glyf.h | 218 + gfx/skia/skia/src/sfnt/SkOTTable_head.h | 146 + gfx/skia/skia/src/sfnt/SkOTTable_hhea.h | 54 + gfx/skia/skia/src/sfnt/SkOTTable_hmtx.h | 34 + gfx/skia/skia/src/sfnt/SkOTTable_loca.h | 31 + gfx/skia/skia/src/sfnt/SkOTTable_maxp.h | 34 + gfx/skia/skia/src/sfnt/SkOTTable_maxp_CFF.h | 30 + gfx/skia/skia/src/sfnt/SkOTTable_maxp_TT.h | 48 + gfx/skia/skia/src/sfnt/SkOTTable_name.cpp | 586 ++ gfx/skia/skia/src/sfnt/SkOTTable_name.h | 577 ++ gfx/skia/skia/src/sfnt/SkOTTable_post.h | 50 + gfx/skia/skia/src/sfnt/SkOTUtils.cpp | 231 + gfx/skia/skia/src/sfnt/SkOTUtils.h | 105 + gfx/skia/skia/src/sfnt/SkPanose.h | 527 ++ gfx/skia/skia/src/sfnt/SkSFNTHeader.h | 70 + gfx/skia/skia/src/sfnt/SkTTCFHeader.h | 57 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gfx/skia/skia/src/shaders/SkTransformShader.cpp | 99 + gfx/skia/skia/src/shaders/SkTransformShader.h | 59 + .../src/shaders/gradients/SkGradientShader.cpp | 7 + .../src/shaders/gradients/SkGradientShaderBase.cpp | 1325 +++++ .../src/shaders/gradients/SkGradientShaderBase.h | 192 + .../src/shaders/gradients/SkLinearGradient.cpp | 180 + .../skia/src/shaders/gradients/SkLinearGradient.h | 50 + .../src/shaders/gradients/SkRadialGradient.cpp | 218 + .../skia/src/shaders/gradients/SkSweepGradient.cpp | 294 + .../gradients/SkTwoPointConicalGradient.cpp | 657 +++ gfx/skia/skia/src/sksl/GLSL.std.450.h | 131 + gfx/skia/skia/src/sksl/README.md | 158 + gfx/skia/skia/src/sksl/SkSLAnalysis.cpp | 705 +++ gfx/skia/skia/src/sksl/SkSLAnalysis.h | 261 + gfx/skia/skia/src/sksl/SkSLBuiltinTypes.cpp | 205 + gfx/skia/skia/src/sksl/SkSLBuiltinTypes.h | 167 + gfx/skia/skia/src/sksl/SkSLCompiler.cpp | 726 +++ gfx/skia/skia/src/sksl/SkSLCompiler.h | 242 + gfx/skia/skia/src/sksl/SkSLConstantFolder.cpp | 884 +++ 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.../codegen/SkSLPipelineStageCodeGenerator.cpp | 814 +++ .../sksl/codegen/SkSLPipelineStageCodeGenerator.h | 70 + .../src/sksl/codegen/SkSLRasterPipelineBuilder.cpp | 2861 ++++++++++ .../src/sksl/codegen/SkSLRasterPipelineBuilder.h | 655 +++ .../codegen/SkSLRasterPipelineCodeGenerator.cpp | 3444 ++++++++++++ .../sksl/codegen/SkSLRasterPipelineCodeGenerator.h | 32 + .../src/sksl/codegen/SkSLSPIRVCodeGenerator.cpp | 4365 +++++++++++++++ .../skia/src/sksl/codegen/SkSLSPIRVCodeGenerator.h | 601 +++ gfx/skia/skia/src/sksl/codegen/SkSLSPIRVtoHLSL.cpp | 49 + gfx/skia/skia/src/sksl/codegen/SkSLSPIRVtoHLSL.h | 19 + .../skia/src/sksl/codegen/SkSLVMCodeGenerator.cpp | 2302 ++++++++ .../skia/src/sksl/codegen/SkSLVMCodeGenerator.h | 79 + .../src/sksl/codegen/SkSLWGSLCodeGenerator.cpp | 1939 +++++++ .../skia/src/sksl/codegen/SkSLWGSLCodeGenerator.h | 289 + gfx/skia/skia/src/sksl/dsl/DSLBlock.cpp | 49 + gfx/skia/skia/src/sksl/dsl/DSLCase.cpp | 46 + gfx/skia/skia/src/sksl/dsl/DSLCore.cpp | 615 +++ gfx/skia/skia/src/sksl/dsl/DSLExpression.cpp | 295 + gfx/skia/skia/src/sksl/dsl/DSLFunction.cpp | 146 + gfx/skia/skia/src/sksl/dsl/DSLLayout.cpp | 36 + gfx/skia/skia/src/sksl/dsl/DSLStatement.cpp | 67 + gfx/skia/skia/src/sksl/dsl/DSLType.cpp | 316 ++ gfx/skia/skia/src/sksl/dsl/DSLVar.cpp | 177 + gfx/skia/skia/src/sksl/dsl/priv/DSLWriter.cpp | 132 + gfx/skia/skia/src/sksl/dsl/priv/DSLWriter.h | 64 + gfx/skia/skia/src/sksl/dsl/priv/DSL_priv.h | 32 + .../src/sksl/generated/sksl_compute.minified.sksl | 7 + .../sksl/generated/sksl_compute.unoptimized.sksl | 7 + .../src/sksl/generated/sksl_frag.minified.sksl | 5 + .../src/sksl/generated/sksl_frag.unoptimized.sksl | 5 + .../skia/src/sksl/generated/sksl_gpu.minified.sksl | 85 + .../src/sksl/generated/sksl_gpu.unoptimized.sksl | 107 + .../generated/sksl_graphite_frag.dehydrated.sksl | 3119 +++++++++++ .../generated/sksl_graphite_frag.minified.sksl | 179 + .../generated/sksl_graphite_frag.unoptimized.sksl | 314 ++ 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gfx/skia/skia/src/utils/win/SkObjBase.h create mode 100644 gfx/skia/skia/src/utils/win/SkTScopedComPtr.h create mode 100644 gfx/skia/skia/src/utils/win/SkWGL.h create mode 100644 gfx/skia/skia/src/utils/win/SkWGL_win.cpp (limited to 'gfx/skia') diff --git a/gfx/skia/LICENSE b/gfx/skia/LICENSE new file mode 100644 index 0000000000..e74c256cba --- /dev/null +++ b/gfx/skia/LICENSE @@ -0,0 +1,27 @@ +// Copyright (c) 2011 Google Inc. All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/gfx/skia/README b/gfx/skia/README new file mode 100644 index 0000000000..84e4ecc907 --- /dev/null +++ b/gfx/skia/README @@ -0,0 +1,3 @@ +Skia is a complete 2D graphic library for drawing Text, Geometries, and Images. + +See full details, and build instructions, at http://code.google.com/p/skia/wiki/DocRoot diff --git a/gfx/skia/README_COMMITTING b/gfx/skia/README_COMMITTING new file mode 100644 index 0000000000..4014ea3c7f --- /dev/null +++ b/gfx/skia/README_COMMITTING @@ -0,0 +1,10 @@ +Any changes to Skia should have at a minimum both a Mozilla bug tagged with the [skia-upstream] +whiteboard tag, and also an upstream bug and review request. Any patches that do ultimately land +in mozilla-central must be reviewed by a Skia submodule peer. + +See https://wiki.mozilla.org/Modules/Core#Graphics for current peers. + +In most cases the patch will need to have an r+ from upstream before it is eligible to land here. + +For information on submitting upstream, see: +https://sites.google.com/site/skiadocs/developer-documentation/contributing-code/how-to-submit-a-patch diff --git a/gfx/skia/README_MOZILLA b/gfx/skia/README_MOZILLA new file mode 100644 index 0000000000..af7a003743 --- /dev/null +++ b/gfx/skia/README_MOZILLA @@ -0,0 +1,33 @@ +This is an import of Skia. See skia/include/core/SkMilestone.h for the milestone number. + +Current upstream hash: 4655534302e6a3601c77eae70cc65b202609ab66 (milestone 79) + +How to update +============= + +To update to a new version of Skia: + +- Clone Skia from upstream using the instructions here: https://skia.org/user/download + Usually: `git clone https://skia.googlesource.com/skia` +- Checkout the wanted revision (`git checkout -b `). See below for the current + hash. +- Copy the entire source tree from a Skia clone to mozilla-central/gfx/skia/skia + (make sure that . files are also copied as .gn is mandatory). +- Download gn: cd gfx/skia/skia/bin && python fetch-gn && cd - + Note that these scripts might need Python 2.7. Please use a virtualenv if needed. +- cd gfx/skia && ./generate_mozbuild.py + +Once that's done, use git status to view the files that have changed. Keep an eye on GrUserConfig.h +and SkUserConfig.h as those probably don't want to be overwritten by upstream versions. + +This process will be made more automatic in the future. + +Debug +===== + +In case of issues when updating, run the command manually. +For example, if the following error occurs: +`subprocess.CalledProcessError: Command 'cd skia && bin/gn gen out/linux --args='target_os="linux" ' > /dev/null && bin/gn desc out/linux :skia sources' returned non-zero exit status 1` +Run: +`cd skia && bin/gn gen out/linux --args='target_os="linux"'` +and look at the errors. diff --git a/gfx/skia/generate_mozbuild.py b/gfx/skia/generate_mozbuild.py new file mode 100755 index 0000000000..39675ea9c2 --- /dev/null +++ b/gfx/skia/generate_mozbuild.py @@ -0,0 +1,416 @@ +#!/usr/bin/env python3 + +import locale +import subprocess +from collections import defaultdict +locale.setlocale(locale.LC_ALL, 'en_US.UTF-8') + +header = """ +# +# ##### ####### # # # # # # +# ## # # # # # # # # # # # # +# ## # # # # # # # # # # # +# ## #### # # # # # # # # # # +# ## # # # ####### # # # ####### # ### +# ## # # # # # # # # # # # ### +# # ##### ####### # # ## ## # # # ### +# +# Seriously. You shouldn't even be looking at this file unless you're +# debugging generate_mozbuild.py. +# +# DO NOT MODIFY THIS FILE IT IS AUTOGENERATED. +# + +skia_opt_flags = [] + +if CONFIG['MOZ_OPTIMIZE']: + if CONFIG['CC_TYPE'] == 'clang-cl': + skia_opt_flags += ['-O2'] + elif CONFIG['CC_TYPE'] in ('clang', 'gcc'): + skia_opt_flags += ['-O3'] + +""" + +footer = """ + +# We allow warnings for third-party code that can be updated from upstream. +AllowCompilerWarnings() + +FINAL_LIBRARY = 'gkmedias' +LOCAL_INCLUDES += [ + 'skia', +] + +if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows': + DEFINES['UNICODE'] = True + DEFINES['_UNICODE'] = True + UNIFIED_SOURCES += [ + 'skia/src/fonts/SkFontMgr_indirect.cpp', + 'skia/src/fonts/SkRemotableFontMgr.cpp', + ] + +# We should autogenerate these SSE related flags. + +if CONFIG['INTEL_ARCHITECTURE']: + SOURCES['skia/src/opts/SkOpts_ssse3.cpp'].flags += ['-Dskvx=skvx_ssse3', '-mssse3'] + SOURCES['skia/src/opts/SkOpts_sse42.cpp'].flags += ['-Dskvx=skvx_sse42', '-msse4.2'] + SOURCES['skia/src/opts/SkOpts_avx.cpp'].flags += ['-Dskvx=skvx_avx', '-mavx'] + SOURCES['skia/src/opts/SkOpts_hsw.cpp'].flags += ['-Dskvx=skvx_hsw', '-mavx2', '-mf16c', '-mfma'] + if not CONFIG["MOZ_CODE_COVERAGE"]: + SOURCES['skia/src/opts/SkOpts_skx.cpp'].flags += ['-Dskvx=skvx_skx', '-mavx512f', '-mavx512dq', '-mavx512cd', '-mavx512bw', '-mavx512vl'] +elif CONFIG['CPU_ARCH'] == 'aarch64' and CONFIG['CC_TYPE'] in ('clang', 'gcc'): + SOURCES['skia/src/opts/SkOpts_crc32.cpp'].flags += ['-Dskvx=skvx_crc32', '-march=armv8-a+crc'] + +DEFINES['MOZ_SKIA'] = True + +DEFINES['SKIA_IMPLEMENTATION'] = 1 + +DEFINES['SK_PDF_USE_HARFBUZZ_SUBSETTING'] = 1 + +if CONFIG['MOZ_TREE_FREETYPE']: + DEFINES['SK_CAN_USE_DLOPEN'] = 0 + +# Suppress warnings in third-party code. +CXXFLAGS += [ + '-Wno-deprecated-declarations', + '-Wno-overloaded-virtual', + '-Wno-sign-compare', + '-Wno-unreachable-code', + '-Wno-unused-function', +] +if CONFIG['CC_TYPE'] == 'gcc': + CXXFLAGS += [ + '-Wno-logical-op', + '-Wno-maybe-uninitialized', + ] +if CONFIG['CC_TYPE'] in ('clang', 'clang-cl'): + CXXFLAGS += [ + '-Wno-implicit-fallthrough', + '-Wno-inconsistent-missing-override', + '-Wno-macro-redefined', + '-Wno-unused-private-field', + ] + +if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('gtk', 'android'): + LOCAL_INCLUDES += [ + "/gfx/cairo/cairo/src", + ] + CXXFLAGS += CONFIG['CAIRO_FT_CFLAGS'] + +if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk': + CXXFLAGS += CONFIG['MOZ_PANGO_CFLAGS'] + +if CONFIG['CPU_ARCH'] in ('mips32', 'mips64'): + # The skia code uses `mips` as a variable, but it's a builtin preprocessor + # macro on mips that expands to `1`. + DEFINES['mips'] = False +""" + +import json + +platforms = ['linux', 'mac', 'android', 'win'] + +def parse_sources(output): + return set(v.replace('//', 'skia/') for v in output.decode('utf-8').split() if v.endswith('.cpp') or v.endswith('.S')) + +def generate_opt_sources(): + cpus = [('intel', 'x86', [':ssse3', ':sse42', ':avx', ':hsw', ':skx']), + ('arm64', 'arm64', [':crc32'])] + + opt_sources = {} + for key, cpu, deps in cpus: + subprocess.check_output('cd skia && bin/gn gen out/{0} --args=\'target_cpu="{1}"\''.format(key, cpu), shell=True) + opt_sources[key] = set() + for dep in deps: + try: + output = subprocess.check_output('cd skia && bin/gn desc out/{0} {1} sources'.format(key, dep), shell=True) + if output: + opt_sources[key].update(parse_sources(output)) + except subprocess.CalledProcessError as e: + if e.output.find(b'source_set') < 0: + raise + + return opt_sources + +def generate_platform_sources(): + sources = {} + platform_args = { + 'win' : 'win_vc="C:/" win_sdk_version="00.0.00000.0" win_toolchain_version="00.00.00000"' + } + for plat in platforms: + args = platform_args.get(plat, '') + output = subprocess.check_output('cd skia && bin/gn gen out/{0} --args=\'target_os="{0}" {1}\' > /dev/null && bin/gn desc out/{0} :skia sources'.format(plat, args), shell=True) + if output: + sources[plat] = parse_sources(output) + + plat_deps = { + ':fontmgr_win' : 'win', + ':fontmgr_win_gdi' : 'win', + ':fontmgr_mac_ct' : 'mac', + } + for dep, key in plat_deps.items(): + output = subprocess.check_output('cd skia && bin/gn desc out/{1} {0} sources'.format(dep, key), shell=True) + if output: + sources[key].update(parse_sources(output)) + + deps = {':pdf' : 'pdf'} + for dep, key in deps.items(): + output = subprocess.check_output('cd skia && bin/gn desc out/linux {} sources'.format(dep), shell=True) + if output: + sources[key] = parse_sources(output) + + sources.update(generate_opt_sources()) + return sources + + +def generate_separated_sources(platform_sources): + ignorelist = [ + 'skia/src/android/', + 'skia/src/effects/', + 'skia/src/fonts/', + 'skia/src/ports/SkImageEncoder', + 'skia/src/ports/SkImageGenerator', + 'SkLight', + 'codec', + 'SkWGL', + 'SkMemory_malloc', + 'third_party', + 'SkAnimCodecPlayer', + 'SkCamera', + 'SkCanvasStack', + 'SkCanvasStateUtils', + 'JSON', + 'SkMultiPictureDocument', + 'SkNullCanvas', + 'SkNWayCanvas', + 'SkOverdrawCanvas', + 'SkPaintFilterCanvas', + 'SkParseColor', + 'SkXPS', + 'SkCreateCGImageRef', + 'skia/src/ports/SkGlobalInitialization', + 'SkICC', + ] + + def isignorelisted(value): + for item in ignorelist: + if value.find(item) >= 0: + return True + + return False + + separated = defaultdict(set, { + 'common': { + 'skia/src/codec/SkMasks.cpp', + 'skia/src/effects/imagefilters/SkBlurImageFilter.cpp', + 'skia/src/effects/imagefilters/SkComposeImageFilter.cpp', + 'skia/src/effects/SkDashPathEffect.cpp', + 'skia/src/ports/SkDiscardableMemory_none.cpp', + 'skia/src/ports/SkGlobalInitialization_default.cpp', + 'skia/src/ports/SkMemory_mozalloc.cpp', + 'skia/src/ports/SkImageGenerator_none.cpp', + 'skia/modules/skcms/skcms.cc', + 'skia/src/core/SkImageFilterTypes.cpp', + 'skia/src/ports/SkFontMgr_empty_factory.cpp', + }, + 'android': { + # 'skia/src/ports/SkDebug_android.cpp', + 'skia/src/ports/SkFontHost_cairo.cpp', + # 'skia/src/ports/SkFontHost_FreeType.cpp', + 'skia/src/ports/SkFontHost_FreeType_common.cpp', + # 'skia/src/ports/SkTime_Unix.cpp', + # 'skia/src/utils/SkThreadUtils_pthread.cpp', + }, + 'linux': { + 'skia/src/ports/SkFontHost_cairo.cpp', + 'skia/src/ports/SkFontHost_FreeType_common.cpp', + }, + 'win': set (), + 'intel': set(), + 'arm': set(), + 'arm64': set(), + 'none': set(), + 'pdf': set() + }) + + for plat in platform_sources.keys(): + for value in platform_sources[plat]: + if isignorelisted(value): + continue + + if value in separated['common']: + continue + + key = plat + + if all(value in platform_sources.get(p, {}) + for p in platforms if p != plat): + key = 'common' + + separated[key].add(value) + + return separated + +def uniq(seq): + seen = set() + seen_add = seen.add + return [ x for x in seq if x not in seen and not seen_add(x)] + +def write_cflags(f, values, subsearch, cflag, indent): + def write_indent(indent): + for _ in range(indent): + f.write(' ') + + if isinstance(subsearch, str): + subsearch = [ subsearch ] + + def isallowlisted(value): + for item in subsearch: + if value.find(item) >= 0: + return True + + return False + + val_list = uniq(sorted(values, key=lambda x: x.lower())) + + if len(val_list) == 0: + return + + for val in val_list: + if isallowlisted(val): + write_indent(indent) + f.write("SOURCES[\'" + val + "\'].flags += " + cflag + "\n") + +opt_allowlist = [ + 'SkOpts', + 'SkBitmapProcState', + 'SkBlitRow', + 'SkBlitter', + 'SkSpriteBlitter', + 'SkMatrix.cpp', + 'skcms', +] + +# Unfortunately for now the gpu and pathops directories are +# non-unifiable. Keep track of this and fix it. +unified_ignorelist = [ + 'FontHost', + 'SkBitmapProcState_matrixProcs.cpp', + 'SkBlitter_A8.cpp', + 'SkBlitter_ARGB32.cpp', + 'SkBlitter_Sprite.cpp', + 'SkCpu.cpp', + 'SkScan_Antihair.cpp', + 'SkScan_AntiPath.cpp', + 'SkParse.cpp', + 'SkPDFFont.cpp', + 'SkPDFDevice.cpp', + 'SkPDFType1Font.cpp', + 'SkPictureData.cpp', + 'SkColorSpace', + 'SkPath.cpp', + 'SkPathOpsDebug.cpp', + 'SkParsePath.cpp', + 'SkRecorder.cpp', + 'SkXfermode', + 'SkRTree.cpp', + 'SkVertices.cpp', + 'SkSLLexer.cpp', +] + opt_allowlist + +def write_sources(f, values, indent): + def isignorelisted(value): + for item in unified_ignorelist: + if value.find(item) >= 0: + return True + + return False + + sources = {} + sources['nonunified'] = set() + sources['unified'] = set() + + for item in values: + if isignorelisted(item): + sources['nonunified'].add(item) + else: + sources['unified'].add(item) + + write_list(f, "UNIFIED_SOURCES", sources['unified'], indent) + write_list(f, "SOURCES", sources['nonunified'], indent) + +def write_list(f, name, values, indent): + def write_indent(indent): + for _ in range(indent): + f.write(' ') + + val_list = uniq(sorted(values, key=lambda x: x.lower())) + + if len(val_list) == 0: + return + + write_indent(indent) + f.write(name + ' += [\n') + for val in val_list: + write_indent(indent + 4) + f.write('\'' + val + '\',\n') + + write_indent(indent) + f.write(']\n') + +def write_mozbuild(sources): + filename = 'moz.build' + f = open(filename, 'w') + + f.write(header) + + write_sources(f, sources['common'], 0) + write_cflags(f, sources['common'], opt_allowlist, 'skia_opt_flags', 0) + + f.write("if CONFIG['MOZ_ENABLE_SKIA_PDF']:\n") + write_sources(f, sources['pdf'], 4) + + f.write("if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'android':\n") + write_sources(f, sources['android'], 4) + + f.write("if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('cocoa', 'uikit'):\n") + write_sources(f, sources['mac'], 4) + + f.write("if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk':\n") + write_sources(f, sources['linux'], 4) + + f.write("if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows':\n") + write_list(f, "SOURCES", sources['win'], 4) + + f.write("if CONFIG['INTEL_ARCHITECTURE']:\n") + write_sources(f, sources['intel'], 4) + write_cflags(f, sources['intel'], opt_allowlist, 'skia_opt_flags', 4) + + if sources['arm']: + f.write("elif CONFIG['CPU_ARCH'] == 'arm' and CONFIG['CC_TYPE'] in ('clang', 'gcc'):\n") + write_sources(f, sources['arm'], 4) + write_cflags(f, sources['arm'], opt_allowlist, 'skia_opt_flags', 4) + + if sources['arm64']: + f.write("elif CONFIG['CPU_ARCH'] == 'aarch64':\n") + write_sources(f, sources['arm64'], 4) + write_cflags(f, sources['arm64'], opt_allowlist, 'skia_opt_flags', 4) + + if sources['none']: + f.write("else:\n") + write_sources(f, sources['none'], 4) + + f.write(footer) + + f.close() + + print('Wrote ' + filename) + +def main(): + platform_sources = generate_platform_sources() + separated_sources = generate_separated_sources(platform_sources) + write_mozbuild(separated_sources) + + +if __name__ == '__main__': + main() diff --git a/gfx/skia/moz.build b/gfx/skia/moz.build new file mode 100644 index 0000000000..1d92936263 --- /dev/null +++ b/gfx/skia/moz.build @@ -0,0 +1,620 @@ + +# +# ##### ####### # # # # # # +# ## # # # # # # # # # # # # +# ## # # # # # # # # # # # +# ## #### # # # # # # # # # # +# ## # # # ####### # # # ####### # ### +# ## # # # # # # # # # # # ### +# # ##### ####### # # ## ## # # # ### +# +# Seriously. You shouldn't even be looking at this file unless you're +# debugging generate_mozbuild.py. +# +# DO NOT MODIFY THIS FILE IT IS AUTOGENERATED. +# + +skia_opt_flags = [] + +if CONFIG['MOZ_OPTIMIZE']: + if CONFIG['CC_TYPE'] == 'clang-cl': + skia_opt_flags += ['-O2'] + elif CONFIG['CC_TYPE'] in ('clang', 'gcc'): + skia_opt_flags += ['-O3'] + +UNIFIED_SOURCES += [ + 'skia/src/base/SkArenaAlloc.cpp', + 'skia/src/base/SkBezierCurves.cpp', + 'skia/src/base/SkBlockAllocator.cpp', + 'skia/src/base/SkBuffer.cpp', + 'skia/src/base/SkContainers.cpp', + 'skia/src/base/SkCubics.cpp', + 'skia/src/base/SkDeque.cpp', + 'skia/src/base/SkFloatingPoint.cpp', + 'skia/src/base/SkHalf.cpp', + 'skia/src/base/SkMalloc.cpp', + 'skia/src/base/SkMathPriv.cpp', + 'skia/src/base/SkQuads.cpp', + 'skia/src/base/SkSafeMath.cpp', + 'skia/src/base/SkSemaphore.cpp', + 'skia/src/base/SkTDArray.cpp', + 'skia/src/base/SkThreadID.cpp', + 'skia/src/base/SkTSearch.cpp', + 'skia/src/base/SkUTF.cpp', + 'skia/src/base/SkUtils.cpp', + 'skia/src/codec/SkMasks.cpp', + 'skia/src/core/SkAAClip.cpp', + 'skia/src/core/SkAlphaRuns.cpp', + 'skia/src/core/SkAnalyticEdge.cpp', + 'skia/src/core/SkAnnotation.cpp', + 'skia/src/core/SkATrace.cpp', + 'skia/src/core/SkAutoPixmapStorage.cpp', + 'skia/src/core/SkBBHFactory.cpp', + 'skia/src/core/SkBigPicture.cpp', + 'skia/src/core/SkBitmap.cpp', + 'skia/src/core/SkBitmapCache.cpp', + 'skia/src/core/SkBitmapDevice.cpp', + 'skia/src/core/SkBlendMode.cpp', + 'skia/src/core/SkBlendModeBlender.cpp', + 'skia/src/core/SkBlurMask.cpp', + 'skia/src/core/SkBlurMF.cpp', + 'skia/src/core/SkCachedData.cpp', + 'skia/src/core/SkCanvas.cpp', + 'skia/src/core/SkCanvas_Raster.cpp', + 'skia/src/core/SkCanvasPriv.cpp', + 'skia/src/core/SkCapabilities.cpp', + 'skia/src/core/SkChromeRemoteGlyphCache.cpp', + 'skia/src/core/SkClipStack.cpp', + 'skia/src/core/SkClipStackDevice.cpp', + 'skia/src/core/SkColor.cpp', + 'skia/src/core/SkColorFilter.cpp', + 'skia/src/core/SkColorFilter_Matrix.cpp', + 'skia/src/core/SkCompressedDataUtils.cpp', + 'skia/src/core/SkContourMeasure.cpp', + 'skia/src/core/SkConvertPixels.cpp', + 'skia/src/core/SkCubicClipper.cpp', + 'skia/src/core/SkCubicMap.cpp', + 'skia/src/core/SkData.cpp', + 'skia/src/core/SkDataTable.cpp', + 'skia/src/core/SkDebug.cpp', + 'skia/src/core/SkDeferredDisplayList.cpp', + 'skia/src/core/SkDeferredDisplayListRecorder.cpp', + 'skia/src/core/SkDescriptor.cpp', + 'skia/src/core/SkDevice.cpp', + 'skia/src/core/SkDistanceFieldGen.cpp', + 'skia/src/core/SkDocument.cpp', + 'skia/src/core/SkDraw.cpp', + 'skia/src/core/SkDraw_atlas.cpp', + 'skia/src/core/SkDraw_text.cpp', + 'skia/src/core/SkDraw_vertices.cpp', + 'skia/src/core/SkDrawable.cpp', + 'skia/src/core/SkDrawBase.cpp', + 'skia/src/core/SkDrawLooper.cpp', + 'skia/src/core/SkDrawShadowInfo.cpp', + 'skia/src/core/SkEdge.cpp', + 'skia/src/core/SkEdgeBuilder.cpp', + 'skia/src/core/SkEdgeClipper.cpp', + 'skia/src/core/SkExecutor.cpp', + 'skia/src/core/SkFlattenable.cpp', + 'skia/src/core/SkFont.cpp', + 'skia/src/core/SkFont_serial.cpp', + 'skia/src/core/SkFontDescriptor.cpp', + 'skia/src/core/SkFontMetricsPriv.cpp', + 'skia/src/core/SkFontMgr.cpp', + 'skia/src/core/SkFontStream.cpp', + 'skia/src/core/SkGaussFilter.cpp', + 'skia/src/core/SkGeometry.cpp', + 'skia/src/core/SkGlobalInitialization_core.cpp', + 'skia/src/core/SkGlyph.cpp', + 'skia/src/core/SkGlyphRunPainter.cpp', + 'skia/src/core/SkGpuBlurUtils.cpp', + 'skia/src/core/SkGraphics.cpp', + 'skia/src/core/SkIDChangeListener.cpp', + 'skia/src/core/SkImageFilter.cpp', + 'skia/src/core/SkImageFilterCache.cpp', + 'skia/src/core/SkImageFilterTypes.cpp', + 'skia/src/core/SkImageGenerator.cpp', + 'skia/src/core/SkImageInfo.cpp', + 'skia/src/core/SkLatticeIter.cpp', + 'skia/src/core/SkLineClipper.cpp', + 'skia/src/core/SkLocalMatrixImageFilter.cpp', + 'skia/src/core/SkM44.cpp', + 'skia/src/core/SkMallocPixelRef.cpp', + 'skia/src/core/SkMask.cpp', + 'skia/src/core/SkMaskBlurFilter.cpp', + 'skia/src/core/SkMaskCache.cpp', + 'skia/src/core/SkMaskFilter.cpp', + 'skia/src/core/SkMaskGamma.cpp', + 'skia/src/core/SkMatrixInvert.cpp', + 'skia/src/core/SkMD5.cpp', + 'skia/src/core/SkMesh.cpp', + 'skia/src/core/SkMipmap.cpp', + 'skia/src/core/SkMipmapAccessor.cpp', + 'skia/src/core/SkMipmapBuilder.cpp', + 'skia/src/core/SkModeColorFilter.cpp', + 'skia/src/core/SkPaint.cpp', + 'skia/src/core/SkPaintPriv.cpp', + 'skia/src/core/SkPath_serial.cpp', + 'skia/src/core/SkPathBuilder.cpp', + 'skia/src/core/SkPathEffect.cpp', + 'skia/src/core/SkPathMeasure.cpp', + 'skia/src/core/SkPathRef.cpp', + 'skia/src/core/SkPathUtils.cpp', + 'skia/src/core/SkPicture.cpp', + 'skia/src/core/SkPictureFlat.cpp', + 'skia/src/core/SkPictureImageGenerator.cpp', + 'skia/src/core/SkPicturePlayback.cpp', + 'skia/src/core/SkPictureRecord.cpp', + 'skia/src/core/SkPictureRecorder.cpp', + 'skia/src/core/SkPixelRef.cpp', + 'skia/src/core/SkPixmap.cpp', + 'skia/src/core/SkPixmapDraw.cpp', + 'skia/src/core/SkPoint.cpp', + 'skia/src/core/SkPoint3.cpp', + 'skia/src/core/SkPromiseImageTexture.cpp', + 'skia/src/core/SkPtrRecorder.cpp', + 'skia/src/core/SkQuadClipper.cpp', + 'skia/src/core/SkRasterClip.cpp', + 'skia/src/core/SkRasterPipeline.cpp', + 'skia/src/core/SkRasterPipelineBlitter.cpp', + 'skia/src/core/SkReadBuffer.cpp', + 'skia/src/core/SkReadPixelsRec.cpp', + 'skia/src/core/SkRecord.cpp', + 'skia/src/core/SkRecordDraw.cpp', + 'skia/src/core/SkRecordedDrawable.cpp', + 'skia/src/core/SkRecordOpts.cpp', + 'skia/src/core/SkRecords.cpp', + 'skia/src/core/SkRect.cpp', + 'skia/src/core/SkRegion.cpp', + 'skia/src/core/SkRegion_path.cpp', + 'skia/src/core/SkResourceCache.cpp', + 'skia/src/core/SkRRect.cpp', + 'skia/src/core/SkRSXform.cpp', + 'skia/src/core/SkRuntimeEffect.cpp', + 'skia/src/core/SkScalar.cpp', + 'skia/src/core/SkScalerContext.cpp', + 'skia/src/core/SkScan.cpp', + 'skia/src/core/SkScan_AAAPath.cpp', + 'skia/src/core/SkScan_Hairline.cpp', + 'skia/src/core/SkScan_Path.cpp', + 'skia/src/core/SkScan_SAAPath.cpp', + 'skia/src/core/SkSharedMutex.cpp', + 'skia/src/core/SkSLTypeShared.cpp', + 'skia/src/core/SkSpecialImage.cpp', + 'skia/src/core/SkSpecialSurface.cpp', + 'skia/src/core/SkSpinlock.cpp', + 'skia/src/core/SkStream.cpp', + 'skia/src/core/SkStrike.cpp', + 'skia/src/core/SkStrikeCache.cpp', + 'skia/src/core/SkStrikeSpec.cpp', + 'skia/src/core/SkString.cpp', + 'skia/src/core/SkStringUtils.cpp', + 'skia/src/core/SkStroke.cpp', + 'skia/src/core/SkStrokeRec.cpp', + 'skia/src/core/SkStrokerPriv.cpp', + 'skia/src/core/SkSurfaceCharacterization.cpp', + 'skia/src/core/SkSwizzle.cpp', + 'skia/src/core/SkTaskGroup.cpp', + 'skia/src/core/SkTextBlob.cpp', + 'skia/src/core/SkTextBlobTrace.cpp', + 'skia/src/core/SkTime.cpp', + 'skia/src/core/SkTypeface.cpp', + 'skia/src/core/SkTypeface_remote.cpp', + 'skia/src/core/SkTypefaceCache.cpp', + 'skia/src/core/SkUnPreMultiply.cpp', + 'skia/src/core/SkVertState.cpp', + 'skia/src/core/SkVM.cpp', + 'skia/src/core/SkVMBlitter.cpp', + 'skia/src/core/SkWriteBuffer.cpp', + 'skia/src/core/SkWritePixelsRec.cpp', + 'skia/src/core/SkWriter32.cpp', + 'skia/src/core/SkYUVAInfo.cpp', + 'skia/src/core/SkYUVAPixmaps.cpp', + 'skia/src/core/SkYUVMath.cpp', + 'skia/src/core/SkYUVPlanesCache.cpp', + 'skia/src/effects/imagefilters/SkBlurImageFilter.cpp', + 'skia/src/effects/imagefilters/SkComposeImageFilter.cpp', + 'skia/src/effects/SkDashPathEffect.cpp', + 'skia/src/encode/SkEncoder.cpp', + 'skia/src/encode/SkImageEncoder.cpp', + 'skia/src/image/SkImage.cpp', + 'skia/src/image/SkImage_Base.cpp', + 'skia/src/image/SkImage_Lazy.cpp', + 'skia/src/image/SkImage_Raster.cpp', + 'skia/src/image/SkRescaleAndReadPixels.cpp', + 'skia/src/image/SkSurface.cpp', + 'skia/src/image/SkSurface_Base.cpp', + 'skia/src/image/SkSurface_Null.cpp', + 'skia/src/image/SkSurface_Raster.cpp', + 'skia/src/lazy/SkDiscardableMemoryPool.cpp', + 'skia/src/pathops/SkAddIntersections.cpp', + 'skia/src/pathops/SkDConicLineIntersection.cpp', + 'skia/src/pathops/SkDCubicLineIntersection.cpp', + 'skia/src/pathops/SkDCubicToQuads.cpp', + 'skia/src/pathops/SkDLineIntersection.cpp', + 'skia/src/pathops/SkDQuadLineIntersection.cpp', + 'skia/src/pathops/SkIntersections.cpp', + 'skia/src/pathops/SkOpAngle.cpp', + 'skia/src/pathops/SkOpBuilder.cpp', + 'skia/src/pathops/SkOpCoincidence.cpp', + 'skia/src/pathops/SkOpContour.cpp', + 'skia/src/pathops/SkOpCubicHull.cpp', + 'skia/src/pathops/SkOpEdgeBuilder.cpp', + 'skia/src/pathops/SkOpSegment.cpp', + 'skia/src/pathops/SkOpSpan.cpp', + 'skia/src/pathops/SkPathOpsAsWinding.cpp', + 'skia/src/pathops/SkPathOpsCommon.cpp', + 'skia/src/pathops/SkPathOpsConic.cpp', + 'skia/src/pathops/SkPathOpsCubic.cpp', + 'skia/src/pathops/SkPathOpsCurve.cpp', + 'skia/src/pathops/SkPathOpsLine.cpp', + 'skia/src/pathops/SkPathOpsOp.cpp', + 'skia/src/pathops/SkPathOpsQuad.cpp', + 'skia/src/pathops/SkPathOpsRect.cpp', + 'skia/src/pathops/SkPathOpsSimplify.cpp', + 'skia/src/pathops/SkPathOpsTightBounds.cpp', + 'skia/src/pathops/SkPathOpsTSect.cpp', + 'skia/src/pathops/SkPathOpsTypes.cpp', + 'skia/src/pathops/SkPathOpsWinding.cpp', + 'skia/src/pathops/SkPathWriter.cpp', + 'skia/src/pathops/SkReduceOrder.cpp', + 'skia/src/ports/SkDiscardableMemory_none.cpp', + 'skia/src/ports/SkFontMgr_empty_factory.cpp', + 'skia/src/ports/SkGlobalInitialization_default.cpp', + 'skia/src/ports/SkImageGenerator_none.cpp', + 'skia/src/ports/SkMemory_mozalloc.cpp', + 'skia/src/ports/SkOSFile_stdio.cpp', + 'skia/src/sfnt/SkOTTable_name.cpp', + 'skia/src/sfnt/SkOTUtils.cpp', + 'skia/src/shaders/gradients/SkGradientShader.cpp', + 'skia/src/shaders/gradients/SkGradientShaderBase.cpp', + 'skia/src/shaders/gradients/SkLinearGradient.cpp', + 'skia/src/shaders/gradients/SkRadialGradient.cpp', + 'skia/src/shaders/gradients/SkSweepGradient.cpp', + 'skia/src/shaders/gradients/SkTwoPointConicalGradient.cpp', + 'skia/src/shaders/SkBitmapProcShader.cpp', + 'skia/src/shaders/SkColorFilterShader.cpp', + 'skia/src/shaders/SkColorShader.cpp', + 'skia/src/shaders/SkComposeShader.cpp', + 'skia/src/shaders/SkCoordClampShader.cpp', + 'skia/src/shaders/SkEmptyShader.cpp', + 'skia/src/shaders/SkGainmapShader.cpp', + 'skia/src/shaders/SkImageShader.cpp', + 'skia/src/shaders/SkLocalMatrixShader.cpp', + 'skia/src/shaders/SkPerlinNoiseShader.cpp', + 'skia/src/shaders/SkPictureShader.cpp', + 'skia/src/shaders/SkShader.cpp', + 'skia/src/shaders/SkTransformShader.cpp', + 'skia/src/sksl/analysis/SkSLCanExitWithoutReturningValue.cpp', + 'skia/src/sksl/analysis/SkSLCheckProgramStructure.cpp', + 'skia/src/sksl/analysis/SkSLFinalizationChecks.cpp', + 'skia/src/sksl/analysis/SkSLGetLoopControlFlowInfo.cpp', + 'skia/src/sksl/analysis/SkSLGetLoopUnrollInfo.cpp', + 'skia/src/sksl/analysis/SkSLGetReturnComplexity.cpp', + 'skia/src/sksl/analysis/SkSLHasSideEffects.cpp', + 'skia/src/sksl/analysis/SkSLIsConstantExpression.cpp', + 'skia/src/sksl/analysis/SkSLIsDynamicallyUniformExpression.cpp', + 'skia/src/sksl/analysis/SkSLIsSameExpressionTree.cpp', + 'skia/src/sksl/analysis/SkSLIsTrivialExpression.cpp', + 'skia/src/sksl/analysis/SkSLProgramUsage.cpp', + 'skia/src/sksl/analysis/SkSLSwitchCaseContainsExit.cpp', + 'skia/src/sksl/analysis/SkSLSymbolTableStackBuilder.cpp', + 'skia/src/sksl/codegen/SkSLRasterPipelineBuilder.cpp', + 'skia/src/sksl/codegen/SkSLRasterPipelineCodeGenerator.cpp', + 'skia/src/sksl/codegen/SkSLVMCodeGenerator.cpp', + 'skia/src/sksl/dsl/DSLBlock.cpp', + 'skia/src/sksl/dsl/DSLCase.cpp', + 'skia/src/sksl/dsl/DSLCore.cpp', + 'skia/src/sksl/dsl/DSLExpression.cpp', + 'skia/src/sksl/dsl/DSLFunction.cpp', + 'skia/src/sksl/dsl/DSLLayout.cpp', + 'skia/src/sksl/dsl/DSLStatement.cpp', + 'skia/src/sksl/dsl/DSLType.cpp', + 'skia/src/sksl/dsl/DSLVar.cpp', + 'skia/src/sksl/dsl/priv/DSLWriter.cpp', + 'skia/src/sksl/ir/SkSLBinaryExpression.cpp', + 'skia/src/sksl/ir/SkSLBlock.cpp', + 'skia/src/sksl/ir/SkSLChildCall.cpp', + 'skia/src/sksl/ir/SkSLConstructor.cpp', + 'skia/src/sksl/ir/SkSLConstructorArray.cpp', + 'skia/src/sksl/ir/SkSLConstructorArrayCast.cpp', + 'skia/src/sksl/ir/SkSLConstructorCompound.cpp', + 'skia/src/sksl/ir/SkSLConstructorCompoundCast.cpp', + 'skia/src/sksl/ir/SkSLConstructorDiagonalMatrix.cpp', + 'skia/src/sksl/ir/SkSLConstructorMatrixResize.cpp', + 'skia/src/sksl/ir/SkSLConstructorScalarCast.cpp', + 'skia/src/sksl/ir/SkSLConstructorSplat.cpp', + 'skia/src/sksl/ir/SkSLConstructorStruct.cpp', + 'skia/src/sksl/ir/SkSLDiscardStatement.cpp', + 'skia/src/sksl/ir/SkSLDoStatement.cpp', + 'skia/src/sksl/ir/SkSLExpression.cpp', + 'skia/src/sksl/ir/SkSLExpressionStatement.cpp', + 'skia/src/sksl/ir/SkSLFieldAccess.cpp', + 'skia/src/sksl/ir/SkSLForStatement.cpp', + 'skia/src/sksl/ir/SkSLFunctionCall.cpp', + 'skia/src/sksl/ir/SkSLFunctionDeclaration.cpp', + 'skia/src/sksl/ir/SkSLFunctionDefinition.cpp', + 'skia/src/sksl/ir/SkSLIfStatement.cpp', + 'skia/src/sksl/ir/SkSLIndexExpression.cpp', + 'skia/src/sksl/ir/SkSLInterfaceBlock.cpp', + 'skia/src/sksl/ir/SkSLLayout.cpp', + 'skia/src/sksl/ir/SkSLLiteral.cpp', + 'skia/src/sksl/ir/SkSLModifiers.cpp', + 'skia/src/sksl/ir/SkSLPostfixExpression.cpp', + 'skia/src/sksl/ir/SkSLPrefixExpression.cpp', + 'skia/src/sksl/ir/SkSLProgram.cpp', + 'skia/src/sksl/ir/SkSLSetting.cpp', + 'skia/src/sksl/ir/SkSLSwitchStatement.cpp', + 'skia/src/sksl/ir/SkSLSwizzle.cpp', + 'skia/src/sksl/ir/SkSLSymbolTable.cpp', + 'skia/src/sksl/ir/SkSLTernaryExpression.cpp', + 'skia/src/sksl/ir/SkSLType.cpp', + 'skia/src/sksl/ir/SkSLTypeReference.cpp', + 'skia/src/sksl/ir/SkSLVarDeclarations.cpp', + 'skia/src/sksl/ir/SkSLVariable.cpp', + 'skia/src/sksl/ir/SkSLVariableReference.cpp', + 'skia/src/sksl/SkSLAnalysis.cpp', + 'skia/src/sksl/SkSLBuiltinTypes.cpp', + 'skia/src/sksl/SkSLCompiler.cpp', + 'skia/src/sksl/SkSLConstantFolder.cpp', + 'skia/src/sksl/SkSLContext.cpp', + 'skia/src/sksl/SkSLErrorReporter.cpp', + 'skia/src/sksl/SkSLInliner.cpp', + 'skia/src/sksl/SkSLIntrinsicList.cpp', + 'skia/src/sksl/SkSLMangler.cpp', + 'skia/src/sksl/SkSLModuleLoader.cpp', + 'skia/src/sksl/SkSLOperator.cpp', + 'skia/src/sksl/SkSLOutputStream.cpp', + 'skia/src/sksl/SkSLParser.cpp', + 'skia/src/sksl/SkSLPool.cpp', + 'skia/src/sksl/SkSLPosition.cpp', + 'skia/src/sksl/SkSLSampleUsage.cpp', + 'skia/src/sksl/SkSLString.cpp', + 'skia/src/sksl/SkSLThreadContext.cpp', + 'skia/src/sksl/SkSLUtil.cpp', + 'skia/src/sksl/tracing/SkRPDebugTrace.cpp', + 'skia/src/sksl/tracing/SkSLTraceHook.cpp', + 'skia/src/sksl/tracing/SkVMDebugTrace.cpp', + 'skia/src/sksl/tracing/SkVMDebugTracePlayer.cpp', + 'skia/src/sksl/transform/SkSLAddConstToVarModifiers.cpp', + 'skia/src/sksl/transform/SkSLEliminateDeadFunctions.cpp', + 'skia/src/sksl/transform/SkSLEliminateDeadGlobalVariables.cpp', + 'skia/src/sksl/transform/SkSLEliminateDeadLocalVariables.cpp', + 'skia/src/sksl/transform/SkSLEliminateEmptyStatements.cpp', + 'skia/src/sksl/transform/SkSLEliminateUnreachableCode.cpp', + 'skia/src/sksl/transform/SkSLFindAndDeclareBuiltinFunctions.cpp', + 'skia/src/sksl/transform/SkSLFindAndDeclareBuiltinVariables.cpp', + 'skia/src/sksl/transform/SkSLRenamePrivateSymbols.cpp', + 'skia/src/sksl/transform/SkSLReplaceConstVarsWithLiterals.cpp', + 'skia/src/sksl/transform/SkSLRewriteIndexedSwizzle.cpp', + 'skia/src/text/GlyphRun.cpp', + 'skia/src/text/StrikeForGPU.cpp', + 'skia/src/utils/mac/SkCTFont.cpp', + 'skia/src/utils/SkBase64.cpp', + 'skia/src/utils/SkCharToGlyphCache.cpp', + 'skia/src/utils/SkClipStackUtils.cpp', + 'skia/src/utils/SkCustomTypeface.cpp', + 'skia/src/utils/SkDashPath.cpp', + 'skia/src/utils/SkEventTracer.cpp', + 'skia/src/utils/SkFloatToDecimal.cpp', + 'skia/src/utils/SkGaussianColorFilter.cpp', + 'skia/src/utils/SkMatrix22.cpp', + 'skia/src/utils/SkOrderedFontMgr.cpp', + 'skia/src/utils/SkOSPath.cpp', + 'skia/src/utils/SkPatchUtils.cpp', + 'skia/src/utils/SkPolyUtils.cpp', + 'skia/src/utils/SkShaderUtils.cpp', + 'skia/src/utils/SkShadowTessellator.cpp', + 'skia/src/utils/SkShadowUtils.cpp', + 'skia/src/utils/SkTextUtils.cpp', + 'skia/src/utils/SkVMVisualizer.cpp', + 'skia/src/utils/win/SkAutoCoInitialize.cpp', + 'skia/src/utils/win/SkDWrite.cpp', + 'skia/src/utils/win/SkDWriteFontFileStream.cpp', + 'skia/src/utils/win/SkDWriteGeometrySink.cpp', + 'skia/src/utils/win/SkHRESULT.cpp', + 'skia/src/utils/win/SkIStream.cpp', +] +SOURCES += [ + 'skia/modules/skcms/skcms.cc', + 'skia/src/core/SkBitmapProcState.cpp', + 'skia/src/core/SkBitmapProcState_matrixProcs.cpp', + 'skia/src/core/SkBlitRow_D32.cpp', + 'skia/src/core/SkBlitter.cpp', + 'skia/src/core/SkBlitter_A8.cpp', + 'skia/src/core/SkBlitter_ARGB32.cpp', + 'skia/src/core/SkBlitter_Sprite.cpp', + 'skia/src/core/SkColorSpace.cpp', + 'skia/src/core/SkColorSpaceXformSteps.cpp', + 'skia/src/core/SkCpu.cpp', + 'skia/src/core/SkMatrix.cpp', + 'skia/src/core/SkOpts.cpp', + 'skia/src/core/SkOpts_erms.cpp', + 'skia/src/core/SkPath.cpp', + 'skia/src/core/SkPictureData.cpp', + 'skia/src/core/SkRecorder.cpp', + 'skia/src/core/SkRTree.cpp', + 'skia/src/core/SkScan_Antihair.cpp', + 'skia/src/core/SkScan_AntiPath.cpp', + 'skia/src/core/SkSpriteBlitter_ARGB32.cpp', + 'skia/src/core/SkVertices.cpp', + 'skia/src/core/SkXfermode.cpp', + 'skia/src/core/SkXfermodeInterpretation.cpp', + 'skia/src/pathops/SkPathOpsDebug.cpp', + 'skia/src/sksl/SkSLLexer.cpp', + 'skia/src/utils/SkParse.cpp', + 'skia/src/utils/SkParsePath.cpp', +] +SOURCES['skia/modules/skcms/skcms.cc'].flags += skia_opt_flags +SOURCES['skia/src/core/SkBitmapProcState.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkBitmapProcState_matrixProcs.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkBlitRow_D32.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkBlitter.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkBlitter_A8.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkBlitter_ARGB32.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkBlitter_Sprite.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkMatrix.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkOpts.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkOpts_erms.cpp'].flags += skia_opt_flags +SOURCES['skia/src/core/SkSpriteBlitter_ARGB32.cpp'].flags += skia_opt_flags +if CONFIG['MOZ_ENABLE_SKIA_PDF']: + UNIFIED_SOURCES += [ + 'skia/src/pdf/SkClusterator.cpp', + 'skia/src/pdf/SkDeflate.cpp', + 'skia/src/pdf/SkJpegInfo.cpp', + 'skia/src/pdf/SkKeyedImage.cpp', + 'skia/src/pdf/SkPDFBitmap.cpp', + 'skia/src/pdf/SkPDFDocument.cpp', + 'skia/src/pdf/SkPDFFormXObject.cpp', + 'skia/src/pdf/SkPDFGradientShader.cpp', + 'skia/src/pdf/SkPDFGraphicStackState.cpp', + 'skia/src/pdf/SkPDFGraphicState.cpp', + 'skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.cpp', + 'skia/src/pdf/SkPDFMakeToUnicodeCmap.cpp', + 'skia/src/pdf/SkPDFMetadata.cpp', + 'skia/src/pdf/SkPDFResourceDict.cpp', + 'skia/src/pdf/SkPDFShader.cpp', + 'skia/src/pdf/SkPDFSubsetFont.cpp', + 'skia/src/pdf/SkPDFTag.cpp', + 'skia/src/pdf/SkPDFTypes.cpp', + 'skia/src/pdf/SkPDFUtils.cpp', + ] + SOURCES += [ + 'skia/src/pdf/SkPDFDevice.cpp', + 'skia/src/pdf/SkPDFFont.cpp', + 'skia/src/pdf/SkPDFType1Font.cpp', + ] +if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'android': + UNIFIED_SOURCES += [ + 'skia/src/ports/SkDebug_android.cpp', + 'skia/src/ports/SkOSFile_posix.cpp', + 'skia/src/ports/SkOSLibrary_posix.cpp', + ] + SOURCES += [ + 'skia/src/ports/SkFontHost_cairo.cpp', + 'skia/src/ports/SkFontHost_FreeType_common.cpp', + ] +if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('cocoa', 'uikit'): + UNIFIED_SOURCES += [ + 'skia/src/ports/SkDebug_stdio.cpp', + 'skia/src/ports/SkFontMgr_mac_ct.cpp', + 'skia/src/ports/SkOSFile_posix.cpp', + 'skia/src/ports/SkOSLibrary_posix.cpp', + 'skia/src/ports/SkScalerContext_mac_ct.cpp', + 'skia/src/ports/SkTypeface_mac_ct.cpp', + ] +if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk': + UNIFIED_SOURCES += [ + 'skia/src/ports/SkDebug_stdio.cpp', + 'skia/src/ports/SkOSFile_posix.cpp', + 'skia/src/ports/SkOSLibrary_posix.cpp', + ] + SOURCES += [ + 'skia/src/ports/SkFontHost_cairo.cpp', + 'skia/src/ports/SkFontHost_FreeType_common.cpp', + ] +if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows': + SOURCES += [ + 'skia/src/ports/SkDebug_win.cpp', + 'skia/src/ports/SkFontHost_win.cpp', + 'skia/src/ports/SkFontMgr_win_dw.cpp', + 'skia/src/ports/SkOSFile_win.cpp', + 'skia/src/ports/SkOSLibrary_win.cpp', + 'skia/src/ports/SkScalerContext_win_dw.cpp', + 'skia/src/ports/SkTypeface_win_dw.cpp', + ] +if CONFIG['INTEL_ARCHITECTURE']: + SOURCES += [ + 'skia/src/opts/SkOpts_avx.cpp', + 'skia/src/opts/SkOpts_hsw.cpp', + 'skia/src/opts/SkOpts_skx.cpp', + 'skia/src/opts/SkOpts_sse42.cpp', + 'skia/src/opts/SkOpts_ssse3.cpp', + ] + SOURCES['skia/src/opts/SkOpts_avx.cpp'].flags += skia_opt_flags + SOURCES['skia/src/opts/SkOpts_hsw.cpp'].flags += skia_opt_flags + SOURCES['skia/src/opts/SkOpts_skx.cpp'].flags += skia_opt_flags + SOURCES['skia/src/opts/SkOpts_sse42.cpp'].flags += skia_opt_flags + SOURCES['skia/src/opts/SkOpts_ssse3.cpp'].flags += skia_opt_flags +elif CONFIG['CPU_ARCH'] == 'aarch64': + SOURCES += [ + 'skia/src/opts/SkOpts_crc32.cpp', + ] + SOURCES['skia/src/opts/SkOpts_crc32.cpp'].flags += skia_opt_flags + + +# We allow warnings for third-party code that can be updated from upstream. +AllowCompilerWarnings() + +FINAL_LIBRARY = 'gkmedias' +LOCAL_INCLUDES += [ + 'skia', +] + +if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows': + DEFINES['UNICODE'] = True + DEFINES['_UNICODE'] = True + UNIFIED_SOURCES += [ + 'skia/src/fonts/SkFontMgr_indirect.cpp', + 'skia/src/fonts/SkRemotableFontMgr.cpp', + ] + +# We should autogenerate these SSE related flags. + +if CONFIG['INTEL_ARCHITECTURE']: + SOURCES['skia/src/opts/SkOpts_ssse3.cpp'].flags += ['-Dskvx=skvx_ssse3', '-mssse3'] + SOURCES['skia/src/opts/SkOpts_sse42.cpp'].flags += ['-Dskvx=skvx_sse42', '-msse4.2'] + SOURCES['skia/src/opts/SkOpts_avx.cpp'].flags += ['-Dskvx=skvx_avx', '-mavx'] + SOURCES['skia/src/opts/SkOpts_hsw.cpp'].flags += ['-Dskvx=skvx_hsw', '-mavx2', '-mf16c', '-mfma'] + if not CONFIG["MOZ_CODE_COVERAGE"]: + SOURCES['skia/src/opts/SkOpts_skx.cpp'].flags += ['-Dskvx=skvx_skx', '-mavx512f', '-mavx512dq', '-mavx512cd', '-mavx512bw', '-mavx512vl'] +elif CONFIG['CPU_ARCH'] == 'aarch64' and CONFIG['CC_TYPE'] in ('clang', 'gcc'): + SOURCES['skia/src/opts/SkOpts_crc32.cpp'].flags += ['-Dskvx=skvx_crc32', '-march=armv8-a+crc'] + +DEFINES['MOZ_SKIA'] = True + +DEFINES['SKIA_IMPLEMENTATION'] = 1 + +DEFINES['SK_PDF_USE_HARFBUZZ_SUBSETTING'] = 1 + +if CONFIG['MOZ_TREE_FREETYPE']: + DEFINES['SK_CAN_USE_DLOPEN'] = 0 + +# Suppress warnings in third-party code. +CXXFLAGS += [ + '-Wno-deprecated-declarations', + '-Wno-overloaded-virtual', + '-Wno-sign-compare', + '-Wno-unreachable-code', + '-Wno-unused-function', +] +if CONFIG['CC_TYPE'] == 'gcc': + CXXFLAGS += [ + '-Wno-logical-op', + '-Wno-maybe-uninitialized', + ] +if CONFIG['CC_TYPE'] in ('clang', 'clang-cl'): + CXXFLAGS += [ + '-Wno-implicit-fallthrough', + '-Wno-inconsistent-missing-override', + '-Wno-macro-redefined', + '-Wno-unused-private-field', + ] + +if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('gtk', 'android'): + LOCAL_INCLUDES += [ + "/gfx/cairo/cairo/src", + ] + CXXFLAGS += CONFIG['CAIRO_FT_CFLAGS'] + +if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk': + CXXFLAGS += CONFIG['MOZ_PANGO_CFLAGS'] + +if CONFIG['CPU_ARCH'] in ('mips32', 'mips64'): + # The skia code uses `mips` as a variable, but it's a builtin preprocessor + # macro on mips that expands to `1`. + DEFINES['mips'] = False + +# Work around bug 1841199. +if CONFIG['CPU_ARCH'] in ('mips32', 'mips64', 'ppc64'): + DEFINES['musttail'] = 'nomusttail' diff --git a/gfx/skia/patches/README b/gfx/skia/patches/README new file mode 100644 index 0000000000..8fd2c5396a --- /dev/null +++ b/gfx/skia/patches/README @@ -0,0 +1,2 @@ +We no longer keep a local patch queue of patches against upstream. The protocol now +is to upstream all patches before they are landed in mozilla-central. diff --git a/gfx/skia/patches/archive/0001-Bug-687189-Implement-SkPaint-getPosTextPath.patch b/gfx/skia/patches/archive/0001-Bug-687189-Implement-SkPaint-getPosTextPath.patch new file mode 100644 index 0000000000..f8e76dbb90 --- /dev/null +++ b/gfx/skia/patches/archive/0001-Bug-687189-Implement-SkPaint-getPosTextPath.patch @@ -0,0 +1,66 @@ +From 27a914815e757ed12523edf968c9da134dabeaf8 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Fri, 18 May 2012 14:10:44 -0400 +Subject: [PATCH 01/10] Bug 755869 - [4] Re-apply bug 687189 - Implement + SkPaint::getPosTextPath r=mattwoodrow + +--- + gfx/skia/include/core/SkPaint.h | 3 +++ + gfx/skia/src/core/SkPaint.cpp | 27 +++++++++++++++++++++++++++ + 2 files changed, 30 insertions(+), 0 deletions(-) + +diff --git a/gfx/skia/include/core/SkPaint.h b/gfx/skia/include/core/SkPaint.h +index 1930db1..ff37d77 100644 +--- a/gfx/skia/include/core/SkPaint.h ++++ b/gfx/skia/include/core/SkPaint.h +@@ -813,6 +813,9 @@ public: + void getTextPath(const void* text, size_t length, SkScalar x, SkScalar y, + SkPath* path) const; + ++ void getPosTextPath(const void* text, size_t length, ++ const SkPoint pos[], SkPath* path) const; ++ + #ifdef SK_BUILD_FOR_ANDROID + const SkGlyph& getUnicharMetrics(SkUnichar); + const SkGlyph& getGlyphMetrics(uint16_t); +diff --git a/gfx/skia/src/core/SkPaint.cpp b/gfx/skia/src/core/SkPaint.cpp +index 1b74fa1..4c119aa 100644 +--- a/gfx/skia/src/core/SkPaint.cpp ++++ b/gfx/skia/src/core/SkPaint.cpp +@@ -1355,6 +1355,33 @@ void SkPaint::getTextPath(const void* textData, size_t length, + } + } + ++void SkPaint::getPosTextPath(const void* textData, size_t length, ++ const SkPoint pos[], SkPath* path) const { ++ SkASSERT(length == 0 || textData != NULL); ++ ++ const char* text = (const char*)textData; ++ if (text == NULL || length == 0 || path == NULL) { ++ return; ++ } ++ ++ SkTextToPathIter iter(text, length, *this, false); ++ SkMatrix matrix; ++ SkPoint prevPos; ++ prevPos.set(0, 0); ++ ++ matrix.setScale(iter.getPathScale(), iter.getPathScale()); ++ path->reset(); ++ ++ unsigned int i = 0; ++ const SkPath* iterPath; ++ while ((iterPath = iter.next(NULL)) != NULL) { ++ matrix.postTranslate(pos[i].fX - prevPos.fX, pos[i].fY - prevPos.fY); ++ path->addPath(*iterPath, matrix); ++ prevPos = pos[i]; ++ i++; ++ } ++} ++ + static void add_flattenable(SkDescriptor* desc, uint32_t tag, + SkFlattenableWriteBuffer* buffer) { + buffer->flatten(desc->addEntry(tag, buffer->size(), NULL)); +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0001-Bug-777614-Re-add-our-SkUserConfig.h-r-nrc.patch b/gfx/skia/patches/archive/0001-Bug-777614-Re-add-our-SkUserConfig.h-r-nrc.patch new file mode 100644 index 0000000000..8fe0135fbb --- /dev/null +++ b/gfx/skia/patches/archive/0001-Bug-777614-Re-add-our-SkUserConfig.h-r-nrc.patch @@ -0,0 +1,34 @@ +From 2dd8c789fc4ad3b5323c2c29f3e982d185f5b5d9 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Thu, 13 Sep 2012 22:33:38 -0400 +Subject: [PATCH 1/9] Bug 777614 - Re-add our SkUserConfig.h r=nrc + +--- + gfx/skia/include/config/SkUserConfig.h | 13 ++++++++++++- + 1 file changed, 12 insertions(+), 1 deletion(-) + +diff --git a/gfx/skia/include/config/SkUserConfig.h b/gfx/skia/include/config/SkUserConfig.h +index 353272c..fbfbfe0 100644 +--- a/gfx/skia/include/config/SkUserConfig.h ++++ b/gfx/skia/include/config/SkUserConfig.h +@@ -184,5 +184,16 @@ + directories from your include search path when you're not building the GPU + backend. Defaults to 1 (build the GPU code). + */ +-//#define SK_SUPPORT_GPU 1 ++#define SK_SUPPORT_GPU 0 ++ ++/* Don't dither 32bit gradients, to match what the canvas test suite expects. ++ */ ++#define SK_DISABLE_DITHER_32BIT_GRADIENT ++ ++/* Don't include stdint.h on windows as it conflicts with our build system. ++ */ ++#ifdef SK_BUILD_FOR_WIN32 ++ #define SK_IGNORE_STDINT_DOT_H ++#endif ++ + #endif +-- +1.7.11.4 + diff --git a/gfx/skia/patches/archive/0001-Bug-803063-Skia-cross-compilation-for-Windows-fails-.patch b/gfx/skia/patches/archive/0001-Bug-803063-Skia-cross-compilation-for-Windows-fails-.patch new file mode 100644 index 0000000000..20155977e2 --- /dev/null +++ b/gfx/skia/patches/archive/0001-Bug-803063-Skia-cross-compilation-for-Windows-fails-.patch @@ -0,0 +1,26 @@ +From 81ff1a8f5c2a7cc9e8b853101b995433a0c0fa37 Mon Sep 17 00:00:00 2001 +From: Jacek Caban +Date: Thu, 18 Oct 2012 15:25:08 +0200 +Subject: [PATCH] Bug 803063 - Skia cross compilation for Windows fails on + case sensitive OS + +--- + gfx/skia/src/core/SkAdvancedTypefaceMetrics.cpp | 2 +- + 1 files changed, 1 insertions(+), 1 deletions(-) + +diff --git a/gfx/skia/src/core/SkAdvancedTypefaceMetrics.cpp b/gfx/skia/src/core/SkAdvancedTypefaceMetrics.cpp +index 370616e..b647ada 100644 +--- a/gfx/skia/src/core/SkAdvancedTypefaceMetrics.cpp ++++ b/gfx/skia/src/core/SkAdvancedTypefaceMetrics.cpp +@@ -13,7 +13,7 @@ + SK_DEFINE_INST_COUNT(SkAdvancedTypefaceMetrics) + + #if defined(SK_BUILD_FOR_WIN) +-#include ++#include + #endif + + #if defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID) +-- +1.7.8.6 + diff --git a/gfx/skia/patches/archive/0001-Bug-895086-Remove-unused-find_from_uniqueID-function.patch b/gfx/skia/patches/archive/0001-Bug-895086-Remove-unused-find_from_uniqueID-function.patch new file mode 100644 index 0000000000..aa1fadb435 --- /dev/null +++ b/gfx/skia/patches/archive/0001-Bug-895086-Remove-unused-find_from_uniqueID-function.patch @@ -0,0 +1,38 @@ +From 58861c38751adf1f4ef3f67f8e85f5c36f1c43a5 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Wed, 17 Jul 2013 16:28:07 -0400 +Subject: [PATCH] Bug 895086 - Remove unused find_from_uniqueID() function from + SkFontHost_linux + +--- + gfx/skia/src/ports/SkFontHost_linux.cpp | 14 -------------- + 1 file changed, 14 deletions(-) + +diff --git a/gfx/skia/src/ports/SkFontHost_linux.cpp b/gfx/skia/src/ports/SkFontHost_linux.cpp +index df21014..05b73dc 100644 +--- a/gfx/skia/src/ports/SkFontHost_linux.cpp ++++ b/gfx/skia/src/ports/SkFontHost_linux.cpp +@@ -117,20 +117,6 @@ static FamilyRec* find_family(const SkTypeface* member) { + return NULL; + } + +-static SkTypeface* find_from_uniqueID(uint32_t uniqueID) { +- FamilyRec* curr = gFamilyHead; +- while (curr != NULL) { +- for (int i = 0; i < 4; i++) { +- SkTypeface* face = curr->fFaces[i]; +- if (face != NULL && face->uniqueID() == uniqueID) { +- return face; +- } +- } +- curr = curr->fNext; +- } +- return NULL; +-} +- + /* Remove reference to this face from its family. If the resulting family + is empty (has no faces), return that family, otherwise return NULL + */ +-- +1.8.3.1 + diff --git a/gfx/skia/patches/archive/0002-Bug-688366-Dont-invalidate-all-radial-gradients.patch b/gfx/skia/patches/archive/0002-Bug-688366-Dont-invalidate-all-radial-gradients.patch new file mode 100644 index 0000000000..d396b4ed12 --- /dev/null +++ b/gfx/skia/patches/archive/0002-Bug-688366-Dont-invalidate-all-radial-gradients.patch @@ -0,0 +1,30 @@ +From f310d7e8b8d9cf6870c739650324bb585b591c0c Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Fri, 18 May 2012 14:11:32 -0400 +Subject: [PATCH 02/10] Bug 755869 - [5] Re-apply bug 688366 - Fix Skia + marking radial gradients with the same radius as + invalid. r=mattwoodrow + +--- + gfx/skia/src/effects/SkGradientShader.cpp | 5 ++++- + 1 files changed, 4 insertions(+), 1 deletions(-) + +diff --git a/gfx/skia/src/effects/SkGradientShader.cpp b/gfx/skia/src/effects/SkGradientShader.cpp +index 6de820b..59ba48c 100644 +--- a/gfx/skia/src/effects/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/SkGradientShader.cpp +@@ -1911,7 +1911,10 @@ public: + SkPMColor* SK_RESTRICT dstC = dstCParam; + + // Zero difference between radii: fill with transparent black. +- if (fDiffRadius == 0) { ++ // TODO: Is removing this actually correct? Two circles with the ++ // same radius, but different centers doesn't sound like it ++ // should be cleared ++ if (fDiffRadius == 0 && fCenter1 == fCenter2) { + sk_bzero(dstC, count * sizeof(*dstC)); + return; + } +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0002-Bug-848491-Re-apply-Bug-795549-Move-TileProc-functio.patch b/gfx/skia/patches/archive/0002-Bug-848491-Re-apply-Bug-795549-Move-TileProc-functio.patch new file mode 100644 index 0000000000..6ac2c9179d --- /dev/null +++ b/gfx/skia/patches/archive/0002-Bug-848491-Re-apply-Bug-795549-Move-TileProc-functio.patch @@ -0,0 +1,50 @@ +From: George Wright +Date: Mon, 14 Jan 2013 17:59:09 -0500 +Subject: Bug 848491 - Re-apply Bug 795549 - Move TileProc functions into their own file to ensure they only exist once in a library + + +diff --git a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h +index b9dbf1b..729ce4e 100644 +--- a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h ++++ b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h +@@ -37,34 +37,9 @@ static inline void sk_memset32_dither(uint32_t dst[], uint32_t v0, uint32_t v1, + } + } + +-// Clamp +- +-static inline SkFixed clamp_tileproc(SkFixed x) { +- return SkClampMax(x, 0xFFFF); +-} +- +-// Repeat +- +-static inline SkFixed repeat_tileproc(SkFixed x) { +- return x & 0xFFFF; +-} +- +-// Mirror +- +-// Visual Studio 2010 (MSC_VER=1600) optimizes bit-shift code incorrectly. +-// See http://code.google.com/p/skia/issues/detail?id=472 +-#if defined(_MSC_VER) && (_MSC_VER >= 1600) +-#pragma optimize("", off) +-#endif +- +-static inline SkFixed mirror_tileproc(SkFixed x) { +- int s = x << 15 >> 31; +- return (x ^ s) & 0xFFFF; +-} +- +-#if defined(_MSC_VER) && (_MSC_VER >= 1600) +-#pragma optimize("", on) +-#endif ++SkFixed clamp_tileproc(SkFixed x); ++SkFixed repeat_tileproc(SkFixed x); ++SkFixed mirror_tileproc(SkFixed x); + + /////////////////////////////////////////////////////////////////////////////// + +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0003-SkUserConfig-for-Mozilla.patch b/gfx/skia/patches/archive/0003-SkUserConfig-for-Mozilla.patch new file mode 100644 index 0000000000..dc52a8d3d0 --- /dev/null +++ b/gfx/skia/patches/archive/0003-SkUserConfig-for-Mozilla.patch @@ -0,0 +1,39 @@ +From ef53776c06cffc7607c3777702f93e04c0852981 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Fri, 18 May 2012 14:13:49 -0400 +Subject: [PATCH 03/10] Bug 755869 - [6] Re-apply SkUserConfig (no + original bug) r=mattwoodrow + +--- + gfx/skia/include/config/SkUserConfig.h | 10 ++++++++++ + 1 files changed, 10 insertions(+), 0 deletions(-) + +diff --git a/gfx/skia/include/config/SkUserConfig.h b/gfx/skia/include/config/SkUserConfig.h +index 9fdbd0a..f98ba85 100644 +--- a/gfx/skia/include/config/SkUserConfig.h ++++ b/gfx/skia/include/config/SkUserConfig.h +@@ -156,6 +156,10 @@ + //#define SK_SUPPORT_UNITTEST + #endif + ++/* Don't dither 32bit gradients, to match what the canvas test suite expects. ++ */ ++#define SK_DISABLE_DITHER_32BIT_GRADIENT ++ + /* If your system embeds skia and has complex event logging, define this + symbol to name a file that maps the following macros to your system's + equivalents: +@@ -177,4 +181,10 @@ + #define SK_A32_SHIFT 24 + #endif + ++/* Don't include stdint.h on windows as it conflicts with our build system. ++ */ ++#ifdef SK_BUILD_FOR_WIN32 ++ #define SK_IGNORE_STDINT_DOT_H ++#endif ++ + #endif +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0004-Bug-722011-Fix-trailing-commas-in-enums.patch b/gfx/skia/patches/archive/0004-Bug-722011-Fix-trailing-commas-in-enums.patch new file mode 100644 index 0000000000..179aeded5d --- /dev/null +++ b/gfx/skia/patches/archive/0004-Bug-722011-Fix-trailing-commas-in-enums.patch @@ -0,0 +1,280 @@ +From 81d61682a94d47be5b47fb7882ea7e7c7e6c3351 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Fri, 18 May 2012 14:15:28 -0400 +Subject: [PATCH 04/10] Bug 755869 - [7] Re-apply bug 722011 - Fix + trailing commas at end of enum lists r=mattwoodrow + +--- + gfx/skia/include/core/SkAdvancedTypefaceMetrics.h | 8 ++++---- + gfx/skia/include/core/SkBlitRow.h | 2 +- + gfx/skia/include/core/SkCanvas.h | 2 +- + gfx/skia/include/core/SkDevice.h | 2 +- + gfx/skia/include/core/SkDeviceProfile.h | 4 ++-- + gfx/skia/include/core/SkFlattenable.h | 2 +- + gfx/skia/include/core/SkFontHost.h | 4 ++-- + gfx/skia/include/core/SkMaskFilter.h | 2 +- + gfx/skia/include/core/SkPaint.h | 4 ++-- + gfx/skia/include/core/SkScalerContext.h | 9 +++++---- + gfx/skia/include/core/SkTypes.h | 2 +- + gfx/skia/include/effects/SkLayerDrawLooper.h | 2 +- + gfx/skia/src/core/SkBitmap.cpp | 2 +- + gfx/skia/src/core/SkGlyphCache.cpp | 2 +- + 14 files changed, 24 insertions(+), 23 deletions(-) + +diff --git a/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h b/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h +index 09fc9a9..5ffdb45 100644 +--- a/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h ++++ b/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h +@@ -34,7 +34,7 @@ public: + kCFF_Font, + kTrueType_Font, + kOther_Font, +- kNotEmbeddable_Font, ++ kNotEmbeddable_Font + }; + // The type of the underlying font program. This field determines which + // of the following fields are valid. If it is kOther_Font or +@@ -56,7 +56,7 @@ public: + kItalic_Style = 0x00040, + kAllCaps_Style = 0x10000, + kSmallCaps_Style = 0x20000, +- kForceBold_Style = 0x40000, ++ kForceBold_Style = 0x40000 + }; + uint16_t fStyle; // Font style characteristics. + int16_t fItalicAngle; // Counterclockwise degrees from vertical of the +@@ -75,7 +75,7 @@ public: + kHAdvance_PerGlyphInfo = 0x1, // Populate horizontal advance data. + kVAdvance_PerGlyphInfo = 0x2, // Populate vertical advance data. + kGlyphNames_PerGlyphInfo = 0x4, // Populate glyph names (Type 1 only). +- kToUnicode_PerGlyphInfo = 0x8, // Populate ToUnicode table, ignored ++ kToUnicode_PerGlyphInfo = 0x8 // Populate ToUnicode table, ignored + // for Type 1 fonts + }; + +@@ -84,7 +84,7 @@ public: + enum MetricType { + kDefault, // Default advance: fAdvance.count = 1 + kRange, // Advances for a range: fAdvance.count = fEndID-fStartID +- kRun, // fStartID-fEndID have same advance: fAdvance.count = 1 ++ kRun // fStartID-fEndID have same advance: fAdvance.count = 1 + }; + MetricType fType; + uint16_t fStartId; +diff --git a/gfx/skia/include/core/SkBlitRow.h b/gfx/skia/include/core/SkBlitRow.h +index 973ab4c..febc405 100644 +--- a/gfx/skia/include/core/SkBlitRow.h ++++ b/gfx/skia/include/core/SkBlitRow.h +@@ -42,7 +42,7 @@ public: + + enum Flags32 { + kGlobalAlpha_Flag32 = 1 << 0, +- kSrcPixelAlpha_Flag32 = 1 << 1, ++ kSrcPixelAlpha_Flag32 = 1 << 1 + }; + + /** Function pointer that blends 32bit colors onto a 32bit destination. +diff --git a/gfx/skia/include/core/SkCanvas.h b/gfx/skia/include/core/SkCanvas.h +index 25cc94a..d942783 100644 +--- a/gfx/skia/include/core/SkCanvas.h ++++ b/gfx/skia/include/core/SkCanvas.h +@@ -148,7 +148,7 @@ public: + * low byte to high byte: R, G, B, A. + */ + kRGBA_Premul_Config8888, +- kRGBA_Unpremul_Config8888, ++ kRGBA_Unpremul_Config8888 + }; + + /** +diff --git a/gfx/skia/include/core/SkDevice.h b/gfx/skia/include/core/SkDevice.h +index 1e4e0a3..b4d44bf 100644 +--- a/gfx/skia/include/core/SkDevice.h ++++ b/gfx/skia/include/core/SkDevice.h +@@ -139,7 +139,7 @@ public: + protected: + enum Usage { + kGeneral_Usage, +- kSaveLayer_Usage, // +Date: Thu, 23 Aug 2012 16:45:38 -0400 +Subject: [PATCH 4/9] Bug 777614 - Re-apply bug 719872 - Fix crash on Android + by reverting to older FontHost r=nrc + +--- + gfx/skia/src/ports/SkFontHost_android_old.cpp | 664 ++++++++++++++++++++++++++ + 1 file changed, 664 insertions(+) + create mode 100644 gfx/skia/src/ports/SkFontHost_android_old.cpp + +diff --git a/gfx/skia/src/ports/SkFontHost_android_old.cpp b/gfx/skia/src/ports/SkFontHost_android_old.cpp +new file mode 100644 +index 0000000..b5c4f3c +--- /dev/null ++++ b/gfx/skia/src/ports/SkFontHost_android_old.cpp +@@ -0,0 +1,664 @@ ++ ++/* ++ * Copyright 2006 The Android Open Source Project ++ * ++ * Use of this source code is governed by a BSD-style license that can be ++ * found in the LICENSE file. ++ */ ++ ++ ++#include "SkFontHost.h" ++#include "SkDescriptor.h" ++#include "SkMMapStream.h" ++#include "SkPaint.h" ++#include "SkString.h" ++#include "SkStream.h" ++#include "SkThread.h" ++#include "SkTSearch.h" ++#include ++ ++#define FONT_CACHE_MEMORY_BUDGET (768 * 1024) ++ ++#ifndef SK_FONT_FILE_PREFIX ++ #define SK_FONT_FILE_PREFIX "/fonts/" ++#endif ++ ++bool find_name_and_attributes(SkStream* stream, SkString* name, SkTypeface::Style* style, ++ bool* isFixedWidth); ++ ++static void GetFullPathForSysFonts(SkString* full, const char name[]) { ++ full->set(getenv("ANDROID_ROOT")); ++ full->append(SK_FONT_FILE_PREFIX); ++ full->append(name); ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++struct FamilyRec; ++ ++/* This guy holds a mapping of a name -> family, used for looking up fonts. ++ Since it is stored in a stretchy array that doesn't preserve object ++ semantics, we don't use constructor/destructors, but just have explicit ++ helpers to manage our internal bookkeeping. ++*/ ++struct NameFamilyPair { ++ const char* fName; // we own this ++ FamilyRec* fFamily; // we don't own this, we just reference it ++ ++ void construct(const char name[], FamilyRec* family) { ++ fName = strdup(name); ++ fFamily = family; // we don't own this, so just record the referene ++ } ++ ++ void destruct() { ++ free((char*)fName); ++ // we don't own family, so just ignore our reference ++ } ++}; ++ ++// we use atomic_inc to grow this for each typeface we create ++static int32_t gUniqueFontID; ++ ++// this is the mutex that protects these globals ++static SkMutex gFamilyMutex; ++static FamilyRec* gFamilyHead; ++static SkTDArray gNameList; ++ ++struct FamilyRec { ++ FamilyRec* fNext; ++ SkTypeface* fFaces[4]; ++ ++ FamilyRec() ++ { ++ fNext = gFamilyHead; ++ memset(fFaces, 0, sizeof(fFaces)); ++ gFamilyHead = this; ++ } ++}; ++ ++static SkTypeface* find_best_face(const FamilyRec* family, ++ SkTypeface::Style style) { ++ SkTypeface* const* faces = family->fFaces; ++ ++ if (faces[style] != NULL) { // exact match ++ return faces[style]; ++ } ++ // look for a matching bold ++ style = (SkTypeface::Style)(style ^ SkTypeface::kItalic); ++ if (faces[style] != NULL) { ++ return faces[style]; ++ } ++ // look for the plain ++ if (faces[SkTypeface::kNormal] != NULL) { ++ return faces[SkTypeface::kNormal]; ++ } ++ // look for anything ++ for (int i = 0; i < 4; i++) { ++ if (faces[i] != NULL) { ++ return faces[i]; ++ } ++ } ++ // should never get here, since the faces list should not be empty ++ SkASSERT(!"faces list is empty"); ++ return NULL; ++} ++ ++static FamilyRec* find_family(const SkTypeface* member) { ++ FamilyRec* curr = gFamilyHead; ++ while (curr != NULL) { ++ for (int i = 0; i < 4; i++) { ++ if (curr->fFaces[i] == member) { ++ return curr; ++ } ++ } ++ curr = curr->fNext; ++ } ++ return NULL; ++} ++ ++/* Returns the matching typeface, or NULL. If a typeface is found, its refcnt ++ is not modified. ++ */ ++static SkTypeface* find_from_uniqueID(uint32_t uniqueID) { ++ FamilyRec* curr = gFamilyHead; ++ while (curr != NULL) { ++ for (int i = 0; i < 4; i++) { ++ SkTypeface* face = curr->fFaces[i]; ++ if (face != NULL && face->uniqueID() == uniqueID) { ++ return face; ++ } ++ } ++ curr = curr->fNext; ++ } ++ return NULL; ++} ++ ++/* Remove reference to this face from its family. If the resulting family ++ is empty (has no faces), return that family, otherwise return NULL ++*/ ++static FamilyRec* remove_from_family(const SkTypeface* face) { ++ FamilyRec* family = find_family(face); ++ SkASSERT(family->fFaces[face->style()] == face); ++ family->fFaces[face->style()] = NULL; ++ ++ for (int i = 0; i < 4; i++) { ++ if (family->fFaces[i] != NULL) { // family is non-empty ++ return NULL; ++ } ++ } ++ return family; // return the empty family ++} ++ ++// maybe we should make FamilyRec be doubly-linked ++static void detach_and_delete_family(FamilyRec* family) { ++ FamilyRec* curr = gFamilyHead; ++ FamilyRec* prev = NULL; ++ ++ while (curr != NULL) { ++ FamilyRec* next = curr->fNext; ++ if (curr == family) { ++ if (prev == NULL) { ++ gFamilyHead = next; ++ } else { ++ prev->fNext = next; ++ } ++ SkDELETE(family); ++ return; ++ } ++ prev = curr; ++ curr = next; ++ } ++ SkASSERT(!"Yikes, couldn't find family in our list to remove/delete"); ++} ++ ++static SkTypeface* find_typeface(const char name[], SkTypeface::Style style) { ++ NameFamilyPair* list = gNameList.begin(); ++ int count = gNameList.count(); ++ ++ int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); ++ ++ if (index >= 0) { ++ return find_best_face(list[index].fFamily, style); ++ } ++ return NULL; ++} ++ ++static SkTypeface* find_typeface(const SkTypeface* familyMember, ++ SkTypeface::Style style) { ++ const FamilyRec* family = find_family(familyMember); ++ return family ? find_best_face(family, style) : NULL; ++} ++ ++static void add_name(const char name[], FamilyRec* family) { ++ SkAutoAsciiToLC tolc(name); ++ name = tolc.lc(); ++ ++ NameFamilyPair* list = gNameList.begin(); ++ int count = gNameList.count(); ++ ++ int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); ++ ++ if (index < 0) { ++ list = gNameList.insert(~index); ++ list->construct(name, family); ++ } ++} ++ ++static void remove_from_names(FamilyRec* emptyFamily) ++{ ++#ifdef SK_DEBUG ++ for (int i = 0; i < 4; i++) { ++ SkASSERT(emptyFamily->fFaces[i] == NULL); ++ } ++#endif ++ ++ SkTDArray& list = gNameList; ++ ++ // must go backwards when removing ++ for (int i = list.count() - 1; i >= 0; --i) { ++ NameFamilyPair* pair = &list[i]; ++ if (pair->fFamily == emptyFamily) { ++ pair->destruct(); ++ list.remove(i); ++ } ++ } ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++class FamilyTypeface : public SkTypeface { ++public: ++ FamilyTypeface(Style style, bool sysFont, SkTypeface* familyMember, ++ bool isFixedWidth) ++ : SkTypeface(style, sk_atomic_inc(&gUniqueFontID) + 1, isFixedWidth) { ++ fIsSysFont = sysFont; ++ ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ FamilyRec* rec = NULL; ++ if (familyMember) { ++ rec = find_family(familyMember); ++ SkASSERT(rec); ++ } else { ++ rec = SkNEW(FamilyRec); ++ } ++ rec->fFaces[style] = this; ++ } ++ ++ virtual ~FamilyTypeface() { ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ // remove us from our family. If the family is now empty, we return ++ // that and then remove that family from the name list ++ FamilyRec* family = remove_from_family(this); ++ if (NULL != family) { ++ remove_from_names(family); ++ detach_and_delete_family(family); ++ } ++ } ++ ++ bool isSysFont() const { return fIsSysFont; } ++ ++ virtual SkStream* openStream() = 0; ++ virtual const char* getUniqueString() const = 0; ++ virtual const char* getFilePath() const = 0; ++ ++private: ++ bool fIsSysFont; ++ ++ typedef SkTypeface INHERITED; ++}; ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++class StreamTypeface : public FamilyTypeface { ++public: ++ StreamTypeface(Style style, bool sysFont, SkTypeface* familyMember, ++ SkStream* stream, bool isFixedWidth) ++ : INHERITED(style, sysFont, familyMember, isFixedWidth) { ++ SkASSERT(stream); ++ stream->ref(); ++ fStream = stream; ++ } ++ virtual ~StreamTypeface() { ++ fStream->unref(); ++ } ++ ++ // overrides ++ virtual SkStream* openStream() { ++ // we just ref our existing stream, since the caller will call unref() ++ // when they are through ++ fStream->ref(); ++ // must rewind each time, since the caller assumes a "new" stream ++ fStream->rewind(); ++ return fStream; ++ } ++ virtual const char* getUniqueString() const { return NULL; } ++ virtual const char* getFilePath() const { return NULL; } ++ ++private: ++ SkStream* fStream; ++ ++ typedef FamilyTypeface INHERITED; ++}; ++ ++class FileTypeface : public FamilyTypeface { ++public: ++ FileTypeface(Style style, bool sysFont, SkTypeface* familyMember, ++ const char path[], bool isFixedWidth) ++ : INHERITED(style, sysFont, familyMember, isFixedWidth) { ++ SkString fullpath; ++ ++ if (sysFont) { ++ GetFullPathForSysFonts(&fullpath, path); ++ path = fullpath.c_str(); ++ } ++ fPath.set(path); ++ } ++ ++ // overrides ++ virtual SkStream* openStream() { ++ SkStream* stream = SkNEW_ARGS(SkMMAPStream, (fPath.c_str())); ++ ++ // check for failure ++ if (stream->getLength() <= 0) { ++ SkDELETE(stream); ++ // maybe MMAP isn't supported. try FILE ++ stream = SkNEW_ARGS(SkFILEStream, (fPath.c_str())); ++ if (stream->getLength() <= 0) { ++ SkDELETE(stream); ++ stream = NULL; ++ } ++ } ++ return stream; ++ } ++ virtual const char* getUniqueString() const { ++ const char* str = strrchr(fPath.c_str(), '/'); ++ if (str) { ++ str += 1; // skip the '/' ++ } ++ return str; ++ } ++ virtual const char* getFilePath() const { ++ return fPath.c_str(); ++ } ++ ++private: ++ SkString fPath; ++ ++ typedef FamilyTypeface INHERITED; ++}; ++ ++/////////////////////////////////////////////////////////////////////////////// ++/////////////////////////////////////////////////////////////////////////////// ++ ++static bool get_name_and_style(const char path[], SkString* name, ++ SkTypeface::Style* style, ++ bool* isFixedWidth, bool isExpected) { ++ SkString fullpath; ++ GetFullPathForSysFonts(&fullpath, path); ++ ++ SkMMAPStream stream(fullpath.c_str()); ++ if (stream.getLength() > 0) { ++ find_name_and_attributes(&stream, name, style, isFixedWidth); ++ return true; ++ } ++ else { ++ SkFILEStream stream(fullpath.c_str()); ++ if (stream.getLength() > 0) { ++ find_name_and_attributes(&stream, name, style, isFixedWidth); ++ return true; ++ } ++ } ++ ++ if (isExpected) { ++ SkDebugf("---- failed to open <%s> as a font\n", fullpath.c_str()); ++ } ++ return false; ++} ++ ++// used to record our notion of the pre-existing fonts ++struct FontInitRec { ++ const char* fFileName; ++ const char* const* fNames; // null-terminated list ++}; ++ ++static const char* gSansNames[] = { ++ "sans-serif", "arial", "helvetica", "tahoma", "verdana", NULL ++}; ++ ++static const char* gSerifNames[] = { ++ "serif", "times", "times new roman", "palatino", "georgia", "baskerville", ++ "goudy", "fantasy", "cursive", "ITC Stone Serif", NULL ++}; ++ ++static const char* gMonoNames[] = { ++ "monospace", "courier", "courier new", "monaco", NULL ++}; ++ ++// deliberately empty, but we use the address to identify fallback fonts ++static const char* gFBNames[] = { NULL }; ++ ++/* Fonts must be grouped by family, with the first font in a family having the ++ list of names (even if that list is empty), and the following members having ++ null for the list. The names list must be NULL-terminated ++*/ ++static const FontInitRec gSystemFonts[] = { ++ { "DroidSans.ttf", gSansNames }, ++ { "DroidSans-Bold.ttf", NULL }, ++ { "DroidSerif-Regular.ttf", gSerifNames }, ++ { "DroidSerif-Bold.ttf", NULL }, ++ { "DroidSerif-Italic.ttf", NULL }, ++ { "DroidSerif-BoldItalic.ttf", NULL }, ++ { "DroidSansMono.ttf", gMonoNames }, ++ /* These are optional, and can be ignored if not found in the file system. ++ These are appended to gFallbackFonts[] as they are seen, so we list ++ them in the order we want them to be accessed by NextLogicalFont(). ++ */ ++ { "DroidSansArabic.ttf", gFBNames }, ++ { "DroidSansHebrew.ttf", gFBNames }, ++ { "DroidSansThai.ttf", gFBNames }, ++ { "MTLmr3m.ttf", gFBNames }, // Motoya Japanese Font ++ { "MTLc3m.ttf", gFBNames }, // Motoya Japanese Font ++ { "DroidSansJapanese.ttf", gFBNames }, ++ { "DroidSansFallback.ttf", gFBNames } ++}; ++ ++#define DEFAULT_NAMES gSansNames ++ ++// these globals are assigned (once) by load_system_fonts() ++static FamilyRec* gDefaultFamily; ++static SkTypeface* gDefaultNormal; ++ ++/* This is sized conservatively, assuming that it will never be a size issue. ++ It will be initialized in load_system_fonts(), and will be filled with the ++ fontIDs that can be used for fallback consideration, in sorted order (sorted ++ meaning element[0] should be used first, then element[1], etc. When we hit ++ a fontID==0 in the array, the list is done, hence our allocation size is ++ +1 the total number of possible system fonts. Also see NextLogicalFont(). ++ */ ++static uint32_t gFallbackFonts[SK_ARRAY_COUNT(gSystemFonts)+1]; ++ ++/* Called once (ensured by the sentinel check at the beginning of our body). ++ Initializes all the globals, and register the system fonts. ++ */ ++static void load_system_fonts() { ++ // check if we've already be called ++ if (NULL != gDefaultNormal) { ++ return; ++ } ++ ++ const FontInitRec* rec = gSystemFonts; ++ SkTypeface* firstInFamily = NULL; ++ int fallbackCount = 0; ++ ++ for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { ++ // if we're the first in a new family, clear firstInFamily ++ if (rec[i].fNames != NULL) { ++ firstInFamily = NULL; ++ } ++ ++ bool isFixedWidth; ++ SkString name; ++ SkTypeface::Style style; ++ ++ // we expect all the fonts, except the "fallback" fonts ++ bool isExpected = (rec[i].fNames != gFBNames); ++ if (!get_name_and_style(rec[i].fFileName, &name, &style, ++ &isFixedWidth, isExpected)) { ++ continue; ++ } ++ ++ SkTypeface* tf = SkNEW_ARGS(FileTypeface, ++ (style, ++ true, // system-font (cannot delete) ++ firstInFamily, // what family to join ++ rec[i].fFileName, ++ isFixedWidth) // filename ++ ); ++ ++ if (rec[i].fNames != NULL) { ++ // see if this is one of our fallback fonts ++ if (rec[i].fNames == gFBNames) { ++ // SkDebugf("---- adding %s as fallback[%d] fontID %d\n", ++ // rec[i].fFileName, fallbackCount, tf->uniqueID()); ++ gFallbackFonts[fallbackCount++] = tf->uniqueID(); ++ } ++ ++ firstInFamily = tf; ++ FamilyRec* family = find_family(tf); ++ const char* const* names = rec[i].fNames; ++ ++ // record the default family if this is it ++ if (names == DEFAULT_NAMES) { ++ gDefaultFamily = family; ++ } ++ // add the names to map to this family ++ while (*names) { ++ add_name(*names, family); ++ names += 1; ++ } ++ } ++ } ++ ++ // do this after all fonts are loaded. This is our default font, and it ++ // acts as a sentinel so we only execute load_system_fonts() once ++ gDefaultNormal = find_best_face(gDefaultFamily, SkTypeface::kNormal); ++ // now terminate our fallback list with the sentinel value ++ gFallbackFonts[fallbackCount] = 0; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) { ++ const char* name = ((FamilyTypeface*)face)->getUniqueString(); ++ ++ stream->write8((uint8_t)face->style()); ++ ++ if (NULL == name || 0 == *name) { ++ stream->writePackedUInt(0); ++// SkDebugf("--- fonthost serialize null\n"); ++ } else { ++ uint32_t len = strlen(name); ++ stream->writePackedUInt(len); ++ stream->write(name, len); ++// SkDebugf("--- fonthost serialize <%s> %d\n", name, face->style()); ++ } ++} ++ ++SkTypeface* SkFontHost::Deserialize(SkStream* stream) { ++ load_system_fonts(); ++ ++ int style = stream->readU8(); ++ ++ int len = stream->readPackedUInt(); ++ if (len > 0) { ++ SkString str; ++ str.resize(len); ++ stream->read(str.writable_str(), len); ++ ++ const FontInitRec* rec = gSystemFonts; ++ for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { ++ if (strcmp(rec[i].fFileName, str.c_str()) == 0) { ++ // backup until we hit the fNames ++ for (int j = i; j >= 0; --j) { ++ if (rec[j].fNames != NULL) { ++ return SkFontHost::CreateTypeface(NULL, ++ rec[j].fNames[0], (SkTypeface::Style)style); ++ } ++ } ++ } ++ } ++ } ++ return NULL; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace, ++ const char familyName[], ++ SkTypeface::Style style) { ++ load_system_fonts(); ++ ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ // clip to legal style bits ++ style = (SkTypeface::Style)(style & SkTypeface::kBoldItalic); ++ ++ SkTypeface* tf = NULL; ++ ++ if (NULL != familyFace) { ++ tf = find_typeface(familyFace, style); ++ } else if (NULL != familyName) { ++// SkDebugf("======= familyName <%s>\n", familyName); ++ tf = find_typeface(familyName, style); ++ } ++ ++ if (NULL == tf) { ++ tf = find_best_face(gDefaultFamily, style); ++ } ++ ++ // we ref(), since the symantic is to return a new instance ++ tf->ref(); ++ return tf; ++} ++ ++SkStream* SkFontHost::OpenStream(uint32_t fontID) { ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ FamilyTypeface* tf = (FamilyTypeface*)find_from_uniqueID(fontID); ++ SkStream* stream = tf ? tf->openStream() : NULL; ++ ++ if (stream && stream->getLength() == 0) { ++ stream->unref(); ++ stream = NULL; ++ } ++ return stream; ++} ++ ++size_t SkFontHost::GetFileName(SkFontID fontID, char path[], size_t length, ++ int32_t* index) { ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ FamilyTypeface* tf = (FamilyTypeface*)find_from_uniqueID(fontID); ++ const char* src = tf ? tf->getFilePath() : NULL; ++ ++ if (src) { ++ size_t size = strlen(src); ++ if (path) { ++ memcpy(path, src, SkMin32(size, length)); ++ } ++ if (index) { ++ *index = 0; // we don't have collections (yet) ++ } ++ return size; ++ } else { ++ return 0; ++ } ++} ++ ++SkFontID SkFontHost::NextLogicalFont(SkFontID currFontID, SkFontID origFontID) { ++ load_system_fonts(); ++ ++ /* First see if fontID is already one of our fallbacks. If so, return ++ its successor. If fontID is not in our list, then return the first one ++ in our list. Note: list is zero-terminated, and returning zero means ++ we have no more fonts to use for fallbacks. ++ */ ++ const uint32_t* list = gFallbackFonts; ++ for (int i = 0; list[i] != 0; i++) { ++ if (list[i] == currFontID) { ++ return list[i+1]; ++ } ++ } ++ return list[0]; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) { ++ if (NULL == stream || stream->getLength() <= 0) { ++ return NULL; ++ } ++ ++ bool isFixedWidth; ++ SkString name; ++ SkTypeface::Style style; ++ find_name_and_attributes(stream, &name, &style, &isFixedWidth); ++ ++ if (!name.isEmpty()) { ++ return SkNEW_ARGS(StreamTypeface, (style, false, NULL, stream, isFixedWidth)); ++ } else { ++ return NULL; ++ } ++} ++ ++SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { ++ SkStream* stream = SkNEW_ARGS(SkMMAPStream, (path)); ++ SkTypeface* face = SkFontHost::CreateTypefaceFromStream(stream); ++ // since we created the stream, we let go of our ref() here ++ stream->unref(); ++ return face; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// +-- +1.7.11.4 + diff --git a/gfx/skia/patches/archive/0005-Bug-731384-Fix-clang-SK_OVERRIDE.patch b/gfx/skia/patches/archive/0005-Bug-731384-Fix-clang-SK_OVERRIDE.patch new file mode 100644 index 0000000000..e8b5df635b --- /dev/null +++ b/gfx/skia/patches/archive/0005-Bug-731384-Fix-clang-SK_OVERRIDE.patch @@ -0,0 +1,36 @@ +From 80350275c72921ed5ac405c029ae33727467d7c5 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Fri, 18 May 2012 14:15:50 -0400 +Subject: [PATCH 05/10] Bug 755869 - [8] Re-apply bug 731384 - Fix compile + errors on older versions of clang r=mattwoodrow + +--- + gfx/skia/include/core/SkPostConfig.h | 9 +++++++++ + 1 files changed, 9 insertions(+), 0 deletions(-) + +diff --git a/gfx/skia/include/core/SkPostConfig.h b/gfx/skia/include/core/SkPostConfig.h +index 8316f7a..041fe2a 100644 +--- a/gfx/skia/include/core/SkPostConfig.h ++++ b/gfx/skia/include/core/SkPostConfig.h +@@ -288,9 +288,18 @@ + #if defined(_MSC_VER) + #define SK_OVERRIDE override + #elif defined(__clang__) ++#if __has_feature(cxx_override_control) + // Some documentation suggests we should be using __attribute__((override)), + // but it doesn't work. + #define SK_OVERRIDE override ++#elif defined(__has_extension) ++#if __has_extension(cxx_override_control) ++#define SK_OVERRIDE override ++#endif ++#endif ++#ifndef SK_OVERRIDE ++#define SK_OVERRIDE ++#endif + #else + // Linux GCC ignores "__attribute__((override))" and rejects "override". + #define SK_OVERRIDE +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0005-Bug-736276-Add-a-new-SkFontHost-that-takes-a-cairo_s.patch b/gfx/skia/patches/archive/0005-Bug-736276-Add-a-new-SkFontHost-that-takes-a-cairo_s.patch new file mode 100644 index 0000000000..cd2f67131c --- /dev/null +++ b/gfx/skia/patches/archive/0005-Bug-736276-Add-a-new-SkFontHost-that-takes-a-cairo_s.patch @@ -0,0 +1,449 @@ +From: George Wright +Date: Wed, 1 Aug 2012 16:43:15 -0400 +Subject: Bug 736276 - Add a new SkFontHost that takes a cairo_scaled_font_t r=karl + + +diff --git a/gfx/skia/include/ports/SkTypeface_cairo.h b/gfx/skia/include/ports/SkTypeface_cairo.h +new file mode 100644 +index 0000000..7e44f04 +--- /dev/null ++++ b/gfx/skia/include/ports/SkTypeface_cairo.h +@@ -0,0 +1,11 @@ ++#ifndef SkTypeface_cairo_DEFINED ++#define SkTypeface_cairo_DEFINED ++ ++#include ++ ++#include "SkTypeface.h" ++ ++SK_API extern SkTypeface* SkCreateTypefaceFromCairoFont(cairo_font_face_t* fontFace, SkTypeface::Style style, bool isFixedWidth); ++ ++#endif ++ +diff --git a/gfx/skia/moz.build b/gfx/skia/moz.build +index 9ceba59..66efd52 100644 +--- a/gfx/skia/moz.build ++++ b/gfx/skia/moz.build +@@ -171,10 +171,12 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'windows': + 'SkTime_win.cpp', + ] + elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk2': ++ EXPORTS.skia += [ ++ 'include/ports/SkTypeface_cairo.h', ++ ] + CPP_SOURCES += [ +- 'SkFontHost_FreeType.cpp', ++ 'SkFontHost_cairo.cpp', + 'SkFontHost_FreeType_common.cpp', +- 'SkFontHost_linux.cpp', + 'SkThread_pthread.cpp', + 'SkThreadUtils_pthread.cpp', + 'SkThreadUtils_pthread_linux.cpp', +@@ -183,14 +185,15 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gtk2': + ] + elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'qt': + CPP_SOURCES += [ +- 'SkFontHost_FreeType.cpp', ++ 'SkFontHost_cairo.cpp', + 'SkFontHost_FreeType_common.cpp', + 'SkOSFile.cpp', + ] + if CONFIG['OS_TARGET'] == 'Linux': ++ EXPORTS.skia += [ ++ 'include/ports/SkTypeface_cairo.h', ++ ] + CPP_SOURCES += [ +- 'SkFontHost_linux.cpp', +- 'SkFontHost_tables.cpp', + 'SkThread_pthread.cpp', + 'SkThreadUtils_pthread.cpp', + 'SkThreadUtils_pthread_linux.cpp', +@@ -204,11 +207,13 @@ elif CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gonk': + # Separate 'if' from above, since the else below applies to all != 'android' + # toolkits. + if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'android': ++ EXPORTS.skia += [ ++ 'include/ports/SkTypeface_cairo.h', ++ ] + CPP_SOURCES += [ + 'ashmem.cpp', + 'SkDebug_android.cpp', +- 'SkFontHost_android_old.cpp', +- 'SkFontHost_FreeType.cpp', ++ 'SkFontHost_cairo.cpp', + 'SkFontHost_FreeType_common.cpp', + 'SkImageRef_ashmem.cpp', + 'SkTime_Unix.cpp', +diff --git a/gfx/skia/src/ports/SkFontHost_cairo.cpp b/gfx/skia/src/ports/SkFontHost_cairo.cpp +new file mode 100644 +index 0000000..bb5b778 +--- /dev/null ++++ b/gfx/skia/src/ports/SkFontHost_cairo.cpp +@@ -0,0 +1,364 @@ ++ ++/* ++ * Copyright 2012 Mozilla Foundation ++ * ++ * Use of this source code is governed by a BSD-style license that can be ++ * found in the LICENSE file. ++ */ ++ ++#include "cairo.h" ++#include "cairo-ft.h" ++ ++#include "SkFontHost_FreeType_common.h" ++ ++#include "SkAdvancedTypefaceMetrics.h" ++#include "SkFontHost.h" ++#include "SkPath.h" ++#include "SkScalerContext.h" ++#include "SkTypefaceCache.h" ++ ++#include ++#include FT_FREETYPE_H ++ ++static cairo_user_data_key_t kSkTypefaceKey; ++ ++class SkScalerContext_CairoFT : public SkScalerContext_FreeType_Base { ++public: ++ SkScalerContext_CairoFT(SkTypeface* typeface, const SkDescriptor* desc); ++ virtual ~SkScalerContext_CairoFT(); ++ ++protected: ++ virtual unsigned generateGlyphCount() SK_OVERRIDE; ++ virtual uint16_t generateCharToGlyph(SkUnichar uniChar) SK_OVERRIDE; ++ virtual void generateAdvance(SkGlyph* glyph) SK_OVERRIDE; ++ virtual void generateMetrics(SkGlyph* glyph) SK_OVERRIDE; ++ virtual void generateImage(const SkGlyph& glyph) SK_OVERRIDE; ++ virtual void generatePath(const SkGlyph& glyph, SkPath* path) SK_OVERRIDE; ++ virtual void generateFontMetrics(SkPaint::FontMetrics* mx, ++ SkPaint::FontMetrics* my) SK_OVERRIDE; ++ virtual SkUnichar generateGlyphToChar(uint16_t glyph) SK_OVERRIDE; ++private: ++ cairo_scaled_font_t* fScaledFont; ++ uint32_t fLoadGlyphFlags; ++}; ++ ++class CairoLockedFTFace { ++public: ++ CairoLockedFTFace(cairo_scaled_font_t* scaledFont) ++ : fScaledFont(scaledFont) ++ , fFace(cairo_ft_scaled_font_lock_face(scaledFont)) ++ {} ++ ++ ~CairoLockedFTFace() ++ { ++ cairo_ft_scaled_font_unlock_face(fScaledFont); ++ } ++ ++ FT_Face getFace() ++ { ++ return fFace; ++ } ++ ++private: ++ cairo_scaled_font_t* fScaledFont; ++ FT_Face fFace; ++}; ++ ++class SkCairoFTTypeface : public SkTypeface { ++public: ++ static SkTypeface* CreateTypeface(cairo_font_face_t* fontFace, SkTypeface::Style style, bool isFixedWidth) { ++ SkASSERT(fontFace != NULL); ++ SkASSERT(cairo_font_face_get_type(fontFace) == CAIRO_FONT_TYPE_FT); ++ ++ SkFontID newId = SkTypefaceCache::NewFontID(); ++ ++ return SkNEW_ARGS(SkCairoFTTypeface, (fontFace, style, newId, isFixedWidth)); ++ } ++ ++ cairo_font_face_t* getFontFace() { ++ return fFontFace; ++ } ++ ++ virtual SkStream* onOpenStream(int*) const SK_OVERRIDE { return NULL; } ++ ++ virtual SkAdvancedTypefaceMetrics* ++ onGetAdvancedTypefaceMetrics(SkAdvancedTypefaceMetrics::PerGlyphInfo, ++ const uint32_t*, uint32_t) const SK_OVERRIDE ++ { ++ SkDEBUGCODE(SkDebugf("SkCairoFTTypeface::onGetAdvancedTypefaceMetrics unimplemented\n")); ++ return NULL; ++ } ++ ++ virtual SkScalerContext* onCreateScalerContext(const SkDescriptor* desc) const SK_OVERRIDE ++ { ++ return SkNEW_ARGS(SkScalerContext_CairoFT, (const_cast(this), desc)); ++ } ++ ++ virtual void onFilterRec(SkScalerContextRec*) const SK_OVERRIDE ++ { ++ SkDEBUGCODE(SkDebugf("SkCairoFTTypeface::onFilterRec unimplemented\n")); ++ } ++ ++ virtual void onGetFontDescriptor(SkFontDescriptor*, bool*) const SK_OVERRIDE ++ { ++ SkDEBUGCODE(SkDebugf("SkCairoFTTypeface::onGetFontDescriptor unimplemented\n")); ++ } ++ ++ ++private: ++ ++ SkCairoFTTypeface(cairo_font_face_t* fontFace, SkTypeface::Style style, SkFontID id, bool isFixedWidth) ++ : SkTypeface(style, id, isFixedWidth) ++ , fFontFace(fontFace) ++ { ++ cairo_font_face_set_user_data(fFontFace, &kSkTypefaceKey, this, NULL); ++ cairo_font_face_reference(fFontFace); ++ } ++ ++ ~SkCairoFTTypeface() ++ { ++ cairo_font_face_set_user_data(fFontFace, &kSkTypefaceKey, NULL, NULL); ++ cairo_font_face_destroy(fFontFace); ++ } ++ ++ cairo_font_face_t* fFontFace; ++}; ++ ++SkTypeface* SkCreateTypefaceFromCairoFont(cairo_font_face_t* fontFace, SkTypeface::Style style, bool isFixedWidth) ++{ ++ SkTypeface* typeface = reinterpret_cast(cairo_font_face_get_user_data(fontFace, &kSkTypefaceKey)); ++ ++ if (typeface) { ++ typeface->ref(); ++ } else { ++ typeface = SkCairoFTTypeface::CreateTypeface(fontFace, style, isFixedWidth); ++ SkTypefaceCache::Add(typeface, style); ++ } ++ ++ return typeface; ++} ++ ++SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace, ++ const char famillyName[], ++ SkTypeface::Style style) ++{ ++ SkDEBUGFAIL("SkFontHost::FindTypeface unimplemented"); ++ return NULL; ++} ++ ++SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream*) ++{ ++ SkDEBUGFAIL("SkFontHost::CreateTypeface unimplemented"); ++ return NULL; ++} ++ ++SkTypeface* SkFontHost::CreateTypefaceFromFile(char const*) ++{ ++ SkDEBUGFAIL("SkFontHost::CreateTypefaceFromFile unimplemented"); ++ return NULL; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++static bool isLCD(const SkScalerContext::Rec& rec) { ++ switch (rec.fMaskFormat) { ++ case SkMask::kLCD16_Format: ++ case SkMask::kLCD32_Format: ++ return true; ++ default: ++ return false; ++ } ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++SkScalerContext_CairoFT::SkScalerContext_CairoFT(SkTypeface* typeface, const SkDescriptor* desc) ++ : SkScalerContext_FreeType_Base(typeface, desc) ++{ ++ SkMatrix matrix; ++ fRec.getSingleMatrix(&matrix); ++ ++ cairo_font_face_t* fontFace = static_cast(typeface)->getFontFace(); ++ ++ cairo_matrix_t fontMatrix, ctMatrix; ++ cairo_matrix_init(&fontMatrix, matrix.getScaleX(), matrix.getSkewY(), matrix.getSkewX(), matrix.getScaleY(), 0.0, 0.0); ++ cairo_matrix_init_scale(&ctMatrix, 1.0, 1.0); ++ ++ // We need to ensure that the font options match for hinting, as generateMetrics() ++ // uses the fScaledFont which uses these font options ++ cairo_font_options_t *fontOptions = cairo_font_options_create(); ++ ++ FT_Int32 loadFlags = FT_LOAD_DEFAULT; ++ ++ if (SkMask::kBW_Format == fRec.fMaskFormat) { ++ // See http://code.google.com/p/chromium/issues/detail?id=43252#c24 ++ loadFlags = FT_LOAD_TARGET_MONO; ++ if (fRec.getHinting() == SkPaint::kNo_Hinting) { ++ cairo_font_options_set_hint_style(fontOptions, CAIRO_HINT_STYLE_NONE); ++ loadFlags = FT_LOAD_NO_HINTING; ++ } ++ } else { ++ switch (fRec.getHinting()) { ++ case SkPaint::kNo_Hinting: ++ loadFlags = FT_LOAD_NO_HINTING; ++ cairo_font_options_set_hint_style(fontOptions, CAIRO_HINT_STYLE_NONE); ++ break; ++ case SkPaint::kSlight_Hinting: ++ loadFlags = FT_LOAD_TARGET_LIGHT; // This implies FORCE_AUTOHINT ++ cairo_font_options_set_hint_style(fontOptions, CAIRO_HINT_STYLE_SLIGHT); ++ break; ++ case SkPaint::kNormal_Hinting: ++ cairo_font_options_set_hint_style(fontOptions, CAIRO_HINT_STYLE_MEDIUM); ++ if (fRec.fFlags & SkScalerContext::kAutohinting_Flag) { ++ loadFlags = FT_LOAD_FORCE_AUTOHINT; ++ } ++ break; ++ case SkPaint::kFull_Hinting: ++ cairo_font_options_set_hint_style(fontOptions, CAIRO_HINT_STYLE_FULL); ++ if (fRec.fFlags & SkScalerContext::kAutohinting_Flag) { ++ loadFlags = FT_LOAD_FORCE_AUTOHINT; ++ } ++ if (isLCD(fRec)) { ++ if (SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag)) { ++ loadFlags = FT_LOAD_TARGET_LCD_V; ++ } else { ++ loadFlags = FT_LOAD_TARGET_LCD; ++ } ++ } ++ break; ++ default: ++ SkDebugf("---------- UNKNOWN hinting %d\n", fRec.getHinting()); ++ break; ++ } ++ } ++ ++ fScaledFont = cairo_scaled_font_create(fontFace, &fontMatrix, &ctMatrix, fontOptions); ++ ++ if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0) { ++ loadFlags |= FT_LOAD_NO_BITMAP; ++ } ++ ++ // Always using FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH to get correct ++ // advances, as fontconfig and cairo do. ++ // See http://code.google.com/p/skia/issues/detail?id=222. ++ loadFlags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; ++ ++ fLoadGlyphFlags = loadFlags; ++} ++ ++SkScalerContext_CairoFT::~SkScalerContext_CairoFT() ++{ ++ cairo_scaled_font_destroy(fScaledFont); ++} ++ ++unsigned SkScalerContext_CairoFT::generateGlyphCount() ++{ ++ CairoLockedFTFace faceLock(fScaledFont); ++ return faceLock.getFace()->num_glyphs; ++} ++ ++uint16_t SkScalerContext_CairoFT::generateCharToGlyph(SkUnichar uniChar) ++{ ++ CairoLockedFTFace faceLock(fScaledFont); ++ return SkToU16(FT_Get_Char_Index(faceLock.getFace(), uniChar)); ++} ++ ++void SkScalerContext_CairoFT::generateAdvance(SkGlyph* glyph) ++{ ++ generateMetrics(glyph); ++} ++ ++void SkScalerContext_CairoFT::generateMetrics(SkGlyph* glyph) ++{ ++ SkASSERT(fScaledFont != NULL); ++ cairo_text_extents_t extents; ++ cairo_glyph_t cairoGlyph = { glyph->getGlyphID(fBaseGlyphCount), 0.0, 0.0 }; ++ cairo_scaled_font_glyph_extents(fScaledFont, &cairoGlyph, 1, &extents); ++ ++ glyph->fAdvanceX = SkDoubleToFixed(extents.x_advance); ++ glyph->fAdvanceY = SkDoubleToFixed(extents.y_advance); ++ glyph->fWidth = SkToU16(SkScalarCeil(extents.width)); ++ glyph->fHeight = SkToU16(SkScalarCeil(extents.height)); ++ glyph->fLeft = SkToS16(SkScalarCeil(extents.x_bearing)); ++ glyph->fTop = SkToS16(SkScalarCeil(extents.y_bearing)); ++ glyph->fLsbDelta = 0; ++ glyph->fRsbDelta = 0; ++} ++ ++void SkScalerContext_CairoFT::generateImage(const SkGlyph& glyph) ++{ ++ SkASSERT(fScaledFont != NULL); ++ CairoLockedFTFace faceLock(fScaledFont); ++ FT_Face face = faceLock.getFace(); ++ ++ FT_Error err = FT_Load_Glyph(face, glyph.getGlyphID(fBaseGlyphCount), fLoadGlyphFlags); ++ ++ if (err != 0) { ++ memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight); ++ return; ++ } ++ ++ generateGlyphImage(face, glyph); ++} ++ ++void SkScalerContext_CairoFT::generatePath(const SkGlyph& glyph, SkPath* path) ++{ ++ SkASSERT(fScaledFont != NULL); ++ CairoLockedFTFace faceLock(fScaledFont); ++ FT_Face face = faceLock.getFace(); ++ ++ SkASSERT(&glyph && path); ++ ++ uint32_t flags = fLoadGlyphFlags; ++ flags |= FT_LOAD_NO_BITMAP; // ignore embedded bitmaps so we're sure to get the outline ++ flags &= ~FT_LOAD_RENDER; // don't scan convert (we just want the outline) ++ ++ FT_Error err = FT_Load_Glyph(face, glyph.getGlyphID(fBaseGlyphCount), flags); ++ ++ if (err != 0) { ++ path->reset(); ++ return; ++ } ++ ++ generateGlyphPath(face, path); ++} ++ ++void SkScalerContext_CairoFT::generateFontMetrics(SkPaint::FontMetrics* mx, ++ SkPaint::FontMetrics* my) ++{ ++ SkDEBUGCODE(SkDebugf("SkScalerContext_CairoFT::generateFontMetrics unimplemented\n")); ++} ++ ++SkUnichar SkScalerContext_CairoFT::generateGlyphToChar(uint16_t glyph) ++{ ++ SkASSERT(fScaledFont != NULL); ++ CairoLockedFTFace faceLock(fScaledFont); ++ FT_Face face = faceLock.getFace(); ++ ++ FT_UInt glyphIndex; ++ SkUnichar charCode = FT_Get_First_Char(face, &glyphIndex); ++ while (glyphIndex != 0) { ++ if (glyphIndex == glyph) { ++ return charCode; ++ } ++ charCode = FT_Get_Next_Char(face, charCode, &glyphIndex); ++ } ++ ++ return 0; ++} ++ ++#ifdef SK_BUILD_FOR_ANDROID ++SkTypeface* SkAndroidNextLogicalTypeface(SkFontID currFontID, ++ SkFontID origFontID) { ++ return NULL; ++} ++#endif ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++#include "SkFontMgr.h" ++ ++SkFontMgr* SkFontMgr::Factory() { ++ // todo ++ return NULL; ++} ++ +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0005-Bug-777614-Re-apply-bug-687188-Expand-the-gradient-c.patch b/gfx/skia/patches/archive/0005-Bug-777614-Re-apply-bug-687188-Expand-the-gradient-c.patch new file mode 100644 index 0000000000..cfcb40b9d7 --- /dev/null +++ b/gfx/skia/patches/archive/0005-Bug-777614-Re-apply-bug-687188-Expand-the-gradient-c.patch @@ -0,0 +1,198 @@ +From 1ab13a923399aa638388231baca784ba89f2c82b Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Wed, 12 Sep 2012 12:30:29 -0400 +Subject: [PATCH 5/9] Bug 777614 - Re-apply bug 687188 - Expand the gradient + cache by 2 to store 0/1 colour stop values for + clamping. r=nrc + +--- + .../src/effects/gradients/SkGradientShader.cpp | 22 +++++++++++---- + .../src/effects/gradients/SkGradientShaderPriv.h | 5 +++- + .../src/effects/gradients/SkLinearGradient.cpp | 32 ++++++++++++++++------ + .../gradients/SkTwoPointConicalGradient.cpp | 11 ++++++-- + .../effects/gradients/SkTwoPointRadialGradient.cpp | 11 ++++++-- + 5 files changed, 61 insertions(+), 20 deletions(-) + +diff --git a/gfx/skia/src/effects/gradients/SkGradientShader.cpp b/gfx/skia/src/effects/gradients/SkGradientShader.cpp +index f0dac4d..79e7202 100644 +--- a/gfx/skia/src/effects/gradients/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/gradients/SkGradientShader.cpp +@@ -426,15 +426,15 @@ static void complete_32bit_cache(SkPMColor* cache, int stride) { + + const SkPMColor* SkGradientShaderBase::getCache32() const { + if (fCache32 == NULL) { +- // double the count for dither entries +- const int entryCount = kCache32Count * 2; ++ // double the count for dither entries, and have an extra two entries for clamp values ++ const int entryCount = kCache32Count * 2 + 2; + const size_t allocSize = sizeof(SkPMColor) * entryCount; + + if (NULL == fCache32PixelRef) { + fCache32PixelRef = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + } +- fCache32 = (SkPMColor*)fCache32PixelRef->getAddr(); ++ fCache32 = (SkPMColor*)fCache32PixelRef->getAddr() + 1; + if (fColorCount == 2) { + Build32bitCache(fCache32, fOrigColors[0], fOrigColors[1], + kGradient32Length, fCacheAlpha); +@@ -458,7 +458,7 @@ const SkPMColor* SkGradientShaderBase::getCache32() const { + SkMallocPixelRef* newPR = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + SkPMColor* linear = fCache32; // just computed linear data +- SkPMColor* mapped = (SkPMColor*)newPR->getAddr(); // storage for mapped data ++ SkPMColor* mapped = (SkPMColor*)newPR->getAddr() + 1; // storage for mapped data + SkUnitMapper* map = fMapper; + for (int i = 0; i < kGradient32Length; i++) { + int index = map->mapUnit16((i << 8) | i) >> 8; +@@ -467,10 +467,22 @@ const SkPMColor* SkGradientShaderBase::getCache32() const { + } + fCache32PixelRef->unref(); + fCache32PixelRef = newPR; +- fCache32 = (SkPMColor*)newPR->getAddr(); ++ fCache32 = (SkPMColor*)newPR->getAddr() + 1; + } + complete_32bit_cache(fCache32, kCache32Count); + } ++ ++ // Write the clamp colours into the first and last entries of fCache32 ++ fCache32[kCache32ClampLower] = SkPackARGB32(fCacheAlpha, ++ SkColorGetR(fOrigColors[0]), ++ SkColorGetG(fOrigColors[0]), ++ SkColorGetB(fOrigColors[0])); ++ ++ fCache32[kCache32ClampUpper] = SkPackARGB32(fCacheAlpha, ++ SkColorGetR(fOrigColors[fColorCount - 1]), ++ SkColorGetG(fOrigColors[fColorCount - 1]), ++ SkColorGetB(fOrigColors[fColorCount - 1])); ++ + return fCache32; + } + +diff --git a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h +index 0e7c2fc..7427935 100644 +--- a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h ++++ b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h +@@ -133,7 +133,10 @@ public: + kDitherStride32 = 0, + #endif + kDitherStride16 = kCache16Count, +- kLerpRemainderMask32 = (1 << (16 - kCache32Bits)) - 1 ++ kLerpRemainderMask32 = (1 << (16 - kCache32Bits)) - 1, ++ ++ kCache32ClampLower = -1, ++ kCache32ClampUpper = kCache32Count * 2 + }; + + +diff --git a/gfx/skia/src/effects/gradients/SkLinearGradient.cpp b/gfx/skia/src/effects/gradients/SkLinearGradient.cpp +index bcebc26..d400b4d 100644 +--- a/gfx/skia/src/effects/gradients/SkLinearGradient.cpp ++++ b/gfx/skia/src/effects/gradients/SkLinearGradient.cpp +@@ -126,6 +126,17 @@ void shadeSpan_linear_vertical(TileProc proc, SkFixed dx, SkFixed fx, + SkPMColor* SK_RESTRICT dstC, + const SkPMColor* SK_RESTRICT cache, + int toggle, int count) { ++ if (proc == clamp_tileproc) { ++ // No need to lerp or dither for clamp values ++ if (fx < 0) { ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampLower], count); ++ return; ++ } else if (fx > 0xffff) { ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampUpper], count); ++ return; ++ } ++ } ++ + // We're a vertical gradient, so no change in a span. + // If colors change sharply across the gradient, dithering is + // insufficient (it subsamples the color space) and we need to lerp. +@@ -144,6 +155,17 @@ void shadeSpan_linear_vertical_lerp(TileProc proc, SkFixed dx, SkFixed fx, + SkPMColor* SK_RESTRICT dstC, + const SkPMColor* SK_RESTRICT cache, + int toggle, int count) { ++ if (proc == clamp_tileproc) { ++ // No need to lerp or dither for clamp values ++ if (fx < 0) { ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampLower], count); ++ return; ++ } else if (fx > 0xffff) { ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampUpper], count); ++ return; ++ } ++ } ++ + // We're a vertical gradient, so no change in a span. + // If colors change sharply across the gradient, dithering is + // insufficient (it subsamples the color space) and we need to lerp. +@@ -169,10 +191,7 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, + range.init(fx, dx, count, 0, SkGradientShaderBase::kGradient32Length); + + if ((count = range.fCount0) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV0], +- cache[(toggle ^ SkGradientShaderBase::kDitherStride32) + range.fV0], +- count); ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampLower], count); + dstC += count; + } + if ((count = range.fCount1) > 0) { +@@ -191,10 +210,7 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, + } + } + if ((count = range.fCount2) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV1], +- cache[(toggle ^ SkGradientShaderBase::kDitherStride32) + range.fV1], +- count); ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampUpper], count); + } + } + +diff --git a/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp b/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp +index 3466d2c..764a444 100644 +--- a/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp ++++ b/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp +@@ -123,9 +123,14 @@ static void twopoint_clamp(TwoPtRadial* rec, SkPMColor* SK_RESTRICT dstC, + if (TwoPtRadial::DontDrawT(t)) { + *dstC++ = 0; + } else { +- SkFixed index = SkClampMax(t, 0xFFFF); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> SkGradientShaderBase::kCache32Shift]; ++ if (t < 0) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampLower]; ++ } else if (t > 0xFFFF) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampUpper]; ++ } else { ++ SkASSERT(t <= 0xFFFF); ++ *dstC++ = cache[t >> SkGradientShaderBase::kCache32Shift]; ++ } + } + } + } +diff --git a/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp b/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp +index 9362ded..22b028e 100644 +--- a/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp ++++ b/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp +@@ -120,9 +120,14 @@ void shadeSpan_twopoint_clamp(SkScalar fx, SkScalar dx, + for (; count > 0; --count) { + SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, + fOneOverTwoA, posRoot); +- SkFixed index = SkClampMax(t, 0xFFFF); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> SkGradientShaderBase::kCache32Shift]; ++ if (t < 0) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampLower]; ++ } else if (t > 0xFFFF) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampUpper]; ++ } else { ++ SkASSERT(t <= 0xFFFF); ++ *dstC++ = cache[t >> SkGradientShaderBase::kCache32Shift]; ++ } + fx += dx; + fy += dy; + b += db; +-- +1.7.11.4 + diff --git a/gfx/skia/patches/archive/0006-Bug-751814-ARM-EDSP-ARMv6-Skia-fixes.patch b/gfx/skia/patches/archive/0006-Bug-751814-ARM-EDSP-ARMv6-Skia-fixes.patch new file mode 100644 index 0000000000..eb75691ad7 --- /dev/null +++ b/gfx/skia/patches/archive/0006-Bug-751814-ARM-EDSP-ARMv6-Skia-fixes.patch @@ -0,0 +1,147 @@ +From 94916fbbc7865c6fe23a57d6edc48c6daf93dda8 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Fri, 18 May 2012 14:16:08 -0400 +Subject: [PATCH 06/10] Bug 755869 - [9] Re-apply bug 751814 - Various + Skia fixes for ARM without EDSP and ARMv6+ + r=mattwoodrow + +--- + gfx/skia/include/core/SkMath.h | 5 +-- + gfx/skia/include/core/SkPostConfig.h | 45 ++++++++++++++++++++++ + gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp | 6 +- + gfx/skia/src/opts/SkBlitRow_opts_arm.cpp | 9 ++++ + 4 files changed, 58 insertions(+), 7 deletions(-) + +diff --git a/gfx/skia/include/core/SkMath.h b/gfx/skia/include/core/SkMath.h +index 5889103..7a4b707 100644 +--- a/gfx/skia/include/core/SkMath.h ++++ b/gfx/skia/include/core/SkMath.h +@@ -153,10 +153,7 @@ static inline bool SkIsPow2(int value) { + With this requirement, we can generate faster instructions on some + architectures. + */ +-#if defined(__arm__) \ +- && !defined(__thumb__) \ +- && !defined(__ARM_ARCH_4T__) \ +- && !defined(__ARM_ARCH_5T__) ++#ifdef SK_ARM_HAS_EDSP + static inline int32_t SkMulS16(S16CPU x, S16CPU y) { + SkASSERT((int16_t)x == x); + SkASSERT((int16_t)y == y); +diff --git a/gfx/skia/include/core/SkPostConfig.h b/gfx/skia/include/core/SkPostConfig.h +index 041fe2a..03105e4 100644 +--- a/gfx/skia/include/core/SkPostConfig.h ++++ b/gfx/skia/include/core/SkPostConfig.h +@@ -311,3 +311,48 @@ + #ifndef SK_ALLOW_STATIC_GLOBAL_INITIALIZERS + #define SK_ALLOW_STATIC_GLOBAL_INITIALIZERS 1 + #endif ++ ++////////////////////////////////////////////////////////////////////// ++// ARM defines ++ ++#if defined(__GNUC__) && defined(__arm__) ++ ++# define SK_ARM_ARCH 3 ++ ++# if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) \ ++ || defined(_ARM_ARCH_4) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 4 ++# endif ++ ++# if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \ ++ || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \ ++ || defined(__ARM_ARCH_5TEJ__) || defined(_ARM_ARCH_5) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 5 ++# endif ++ ++# if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ ++ || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \ ++ || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) \ ++ || defined(__ARM_ARCH_6M__) || defined(_ARM_ARCH_6) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 6 ++# endif ++ ++# if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ ++ || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ ++ || defined(__ARM_ARCH_7EM__) || defined(_ARM_ARCH_7) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 7 ++# endif ++ ++# undef SK_ARM_HAS_EDSP ++# if defined(__thumb2__) && (SK_ARM_ARCH >= 6) \ ++ || !defined(__thumb__) \ ++ && ((SK_ARM_ARCH > 5) || defined(__ARM_ARCH_5E__) \ ++ || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__)) ++# define SK_ARM_HAS_EDSP 1 ++# endif ++ ++#endif +diff --git a/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp b/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp +index 20d62e1..deb1bfe 100644 +--- a/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp ++++ b/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp +@@ -11,7 +11,7 @@ + #include "SkColorPriv.h" + #include "SkUtils.h" + +-#if __ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN) ++#if SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN) + void SI8_D16_nofilter_DX_arm( + const SkBitmapProcState& s, + const uint32_t* SK_RESTRICT xy, +@@ -182,7 +182,7 @@ void SI8_opaque_D32_nofilter_DX_arm(const SkBitmapProcState& s, + + s.fBitmap->getColorTable()->unlockColors(false); + } +-#endif //__ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN) ++#endif // SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN) + + /////////////////////////////////////////////////////////////////////////////// + +@@ -200,7 +200,7 @@ void SkBitmapProcState::platformProcs() { + + switch (fBitmap->config()) { + case SkBitmap::kIndex8_Config: +-#if __ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN) ++#if SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN) + if (justDx && !doFilter) { + #if 0 /* crashing on android device */ + fSampleProc16 = SI8_D16_nofilter_DX_arm; +diff --git a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +index 2490371..c928888 100644 +--- a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp ++++ b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +@@ -675,8 +675,13 @@ static void __attribute((noinline,optimize("-fomit-frame-pointer"))) S32A_Blend_ + /* dst1_scale and dst2_scale*/ + "lsr r9, r5, #24 \n\t" /* src >> 24 */ + "lsr r10, r6, #24 \n\t" /* src >> 24 */ ++#ifdef SK_ARM_HAS_EDSP + "smulbb r9, r9, %[alpha] \n\t" /* r9 = SkMulS16 r9 with src_scale */ + "smulbb r10, r10, %[alpha] \n\t" /* r10 = SkMulS16 r10 with src_scale */ ++#else ++ "mul r9, r9, %[alpha] \n\t" /* r9 = SkMulS16 r9 with src_scale */ ++ "mul r10, r10, %[alpha] \n\t" /* r10 = SkMulS16 r10 with src_scale */ ++#endif + "lsr r9, r9, #8 \n\t" /* r9 >> 8 */ + "lsr r10, r10, #8 \n\t" /* r10 >> 8 */ + "rsb r9, r9, #256 \n\t" /* dst1_scale = r9 = 255 - r9 + 1 */ +@@ -745,7 +750,11 @@ static void __attribute((noinline,optimize("-fomit-frame-pointer"))) S32A_Blend_ + + "lsr r6, r5, #24 \n\t" /* src >> 24 */ + "and r8, r12, r5, lsr #8 \n\t" /* ag = r8 = r5 masked by r12 lsr by #8 */ ++#ifdef SK_ARM_HAS_EDSP + "smulbb r6, r6, %[alpha] \n\t" /* r6 = SkMulS16 with src_scale */ ++#else ++ "mul r6, r6, %[alpha] \n\t" /* r6 = SkMulS16 with src_scale */ ++#endif + "and r9, r12, r5 \n\t" /* rb = r9 = r5 masked by r12 */ + "lsr r6, r6, #8 \n\t" /* r6 >> 8 */ + "mul r8, r8, %[alpha] \n\t" /* ag = r8 times scale */ +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0006-Bug-848491-Re-apply-Bug-777614-Add-our-SkUserConfig..patch b/gfx/skia/patches/archive/0006-Bug-848491-Re-apply-Bug-777614-Add-our-SkUserConfig..patch new file mode 100644 index 0000000000..2850000ace --- /dev/null +++ b/gfx/skia/patches/archive/0006-Bug-848491-Re-apply-Bug-777614-Add-our-SkUserConfig..patch @@ -0,0 +1,27 @@ +From: George Wright +Date: Thu, 25 Apr 2013 20:40:12 -0400 +Subject: Bug 848491 - Re-apply Bug 777614 - Add our SkUserConfig.h + + +diff --git a/gfx/skia/include/config/SkUserConfig.h b/gfx/skia/include/config/SkUserConfig.h +index 63fc90d..c965e91 100644 +--- a/gfx/skia/include/config/SkUserConfig.h ++++ b/gfx/skia/include/config/SkUserConfig.h +@@ -201,4 +201,14 @@ + */ + //#define SK_SUPPORT_GPU 1 + ++/* Don't dither 32bit gradients, to match what the canvas test suite expects. ++ */ ++#define SK_DISABLE_DITHER_32BIT_GRADIENT ++ ++/* Don't include stdint.h on windows as it conflicts with our build system. ++ */ ++#ifdef SK_BUILD_FOR_WIN32 ++ #define SK_IGNORE_STDINT_DOT_H ++#endif ++ + #endif +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0007-Bug-719872-Old-Android-FontHost.patch b/gfx/skia/patches/archive/0007-Bug-719872-Old-Android-FontHost.patch new file mode 100644 index 0000000000..ca34e1a457 --- /dev/null +++ b/gfx/skia/patches/archive/0007-Bug-719872-Old-Android-FontHost.patch @@ -0,0 +1,702 @@ +From 6982ad469adcdfa2b7bdbf8bbd843bc22d3832fc Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Fri, 18 May 2012 14:52:40 -0400 +Subject: [PATCH 07/10] Bug 755869 - [10] Re-apply bug 719872 - Fix crash + on Android by reverting to older FontHost impl + r=mattwoodrow + +--- + gfx/skia/Makefile.in | 5 +- + gfx/skia/src/ports/SkFontHost_android_old.cpp | 664 +++++++++++++++++++++++++ + 2 files changed, 668 insertions(+), 1 deletions(-) + create mode 100644 gfx/skia/src/ports/SkFontHost_android_old.cpp + +diff --git a/gfx/skia/Makefile.in b/gfx/skia/Makefile.in +index 9da098a..8184f1c 100644 +--- a/gfx/skia/Makefile.in ++++ b/gfx/skia/Makefile.in +@@ -327,7 +327,10 @@ endif + ifeq (android,$(MOZ_WIDGET_TOOLKIT)) + CPPSRCS += \ + SkDebug_android.cpp \ +- SkFontHost_none.cpp \ ++ SkFontHost_android_old.cpp \ ++ SkFontHost_gamma.cpp \ ++ SkFontHost_FreeType.cpp \ ++ SkFontHost_tables.cpp \ + SkMMapStream.cpp \ + SkTime_Unix.cpp \ + SkThread_pthread.cpp \ +diff --git a/gfx/skia/src/ports/SkFontHost_android_old.cpp b/gfx/skia/src/ports/SkFontHost_android_old.cpp +new file mode 100644 +index 0000000..b5c4f3c +--- /dev/null ++++ b/gfx/skia/src/ports/SkFontHost_android_old.cpp +@@ -0,0 +1,664 @@ ++ ++/* ++ * Copyright 2006 The Android Open Source Project ++ * ++ * Use of this source code is governed by a BSD-style license that can be ++ * found in the LICENSE file. ++ */ ++ ++ ++#include "SkFontHost.h" ++#include "SkDescriptor.h" ++#include "SkMMapStream.h" ++#include "SkPaint.h" ++#include "SkString.h" ++#include "SkStream.h" ++#include "SkThread.h" ++#include "SkTSearch.h" ++#include ++ ++#define FONT_CACHE_MEMORY_BUDGET (768 * 1024) ++ ++#ifndef SK_FONT_FILE_PREFIX ++ #define SK_FONT_FILE_PREFIX "/fonts/" ++#endif ++ ++bool find_name_and_attributes(SkStream* stream, SkString* name, SkTypeface::Style* style, ++ bool* isFixedWidth); ++ ++static void GetFullPathForSysFonts(SkString* full, const char name[]) { ++ full->set(getenv("ANDROID_ROOT")); ++ full->append(SK_FONT_FILE_PREFIX); ++ full->append(name); ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++struct FamilyRec; ++ ++/* This guy holds a mapping of a name -> family, used for looking up fonts. ++ Since it is stored in a stretchy array that doesn't preserve object ++ semantics, we don't use constructor/destructors, but just have explicit ++ helpers to manage our internal bookkeeping. ++*/ ++struct NameFamilyPair { ++ const char* fName; // we own this ++ FamilyRec* fFamily; // we don't own this, we just reference it ++ ++ void construct(const char name[], FamilyRec* family) { ++ fName = strdup(name); ++ fFamily = family; // we don't own this, so just record the referene ++ } ++ ++ void destruct() { ++ free((char*)fName); ++ // we don't own family, so just ignore our reference ++ } ++}; ++ ++// we use atomic_inc to grow this for each typeface we create ++static int32_t gUniqueFontID; ++ ++// this is the mutex that protects these globals ++static SkMutex gFamilyMutex; ++static FamilyRec* gFamilyHead; ++static SkTDArray gNameList; ++ ++struct FamilyRec { ++ FamilyRec* fNext; ++ SkTypeface* fFaces[4]; ++ ++ FamilyRec() ++ { ++ fNext = gFamilyHead; ++ memset(fFaces, 0, sizeof(fFaces)); ++ gFamilyHead = this; ++ } ++}; ++ ++static SkTypeface* find_best_face(const FamilyRec* family, ++ SkTypeface::Style style) { ++ SkTypeface* const* faces = family->fFaces; ++ ++ if (faces[style] != NULL) { // exact match ++ return faces[style]; ++ } ++ // look for a matching bold ++ style = (SkTypeface::Style)(style ^ SkTypeface::kItalic); ++ if (faces[style] != NULL) { ++ return faces[style]; ++ } ++ // look for the plain ++ if (faces[SkTypeface::kNormal] != NULL) { ++ return faces[SkTypeface::kNormal]; ++ } ++ // look for anything ++ for (int i = 0; i < 4; i++) { ++ if (faces[i] != NULL) { ++ return faces[i]; ++ } ++ } ++ // should never get here, since the faces list should not be empty ++ SkASSERT(!"faces list is empty"); ++ return NULL; ++} ++ ++static FamilyRec* find_family(const SkTypeface* member) { ++ FamilyRec* curr = gFamilyHead; ++ while (curr != NULL) { ++ for (int i = 0; i < 4; i++) { ++ if (curr->fFaces[i] == member) { ++ return curr; ++ } ++ } ++ curr = curr->fNext; ++ } ++ return NULL; ++} ++ ++/* Returns the matching typeface, or NULL. If a typeface is found, its refcnt ++ is not modified. ++ */ ++static SkTypeface* find_from_uniqueID(uint32_t uniqueID) { ++ FamilyRec* curr = gFamilyHead; ++ while (curr != NULL) { ++ for (int i = 0; i < 4; i++) { ++ SkTypeface* face = curr->fFaces[i]; ++ if (face != NULL && face->uniqueID() == uniqueID) { ++ return face; ++ } ++ } ++ curr = curr->fNext; ++ } ++ return NULL; ++} ++ ++/* Remove reference to this face from its family. If the resulting family ++ is empty (has no faces), return that family, otherwise return NULL ++*/ ++static FamilyRec* remove_from_family(const SkTypeface* face) { ++ FamilyRec* family = find_family(face); ++ SkASSERT(family->fFaces[face->style()] == face); ++ family->fFaces[face->style()] = NULL; ++ ++ for (int i = 0; i < 4; i++) { ++ if (family->fFaces[i] != NULL) { // family is non-empty ++ return NULL; ++ } ++ } ++ return family; // return the empty family ++} ++ ++// maybe we should make FamilyRec be doubly-linked ++static void detach_and_delete_family(FamilyRec* family) { ++ FamilyRec* curr = gFamilyHead; ++ FamilyRec* prev = NULL; ++ ++ while (curr != NULL) { ++ FamilyRec* next = curr->fNext; ++ if (curr == family) { ++ if (prev == NULL) { ++ gFamilyHead = next; ++ } else { ++ prev->fNext = next; ++ } ++ SkDELETE(family); ++ return; ++ } ++ prev = curr; ++ curr = next; ++ } ++ SkASSERT(!"Yikes, couldn't find family in our list to remove/delete"); ++} ++ ++static SkTypeface* find_typeface(const char name[], SkTypeface::Style style) { ++ NameFamilyPair* list = gNameList.begin(); ++ int count = gNameList.count(); ++ ++ int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); ++ ++ if (index >= 0) { ++ return find_best_face(list[index].fFamily, style); ++ } ++ return NULL; ++} ++ ++static SkTypeface* find_typeface(const SkTypeface* familyMember, ++ SkTypeface::Style style) { ++ const FamilyRec* family = find_family(familyMember); ++ return family ? find_best_face(family, style) : NULL; ++} ++ ++static void add_name(const char name[], FamilyRec* family) { ++ SkAutoAsciiToLC tolc(name); ++ name = tolc.lc(); ++ ++ NameFamilyPair* list = gNameList.begin(); ++ int count = gNameList.count(); ++ ++ int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); ++ ++ if (index < 0) { ++ list = gNameList.insert(~index); ++ list->construct(name, family); ++ } ++} ++ ++static void remove_from_names(FamilyRec* emptyFamily) ++{ ++#ifdef SK_DEBUG ++ for (int i = 0; i < 4; i++) { ++ SkASSERT(emptyFamily->fFaces[i] == NULL); ++ } ++#endif ++ ++ SkTDArray& list = gNameList; ++ ++ // must go backwards when removing ++ for (int i = list.count() - 1; i >= 0; --i) { ++ NameFamilyPair* pair = &list[i]; ++ if (pair->fFamily == emptyFamily) { ++ pair->destruct(); ++ list.remove(i); ++ } ++ } ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++class FamilyTypeface : public SkTypeface { ++public: ++ FamilyTypeface(Style style, bool sysFont, SkTypeface* familyMember, ++ bool isFixedWidth) ++ : SkTypeface(style, sk_atomic_inc(&gUniqueFontID) + 1, isFixedWidth) { ++ fIsSysFont = sysFont; ++ ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ FamilyRec* rec = NULL; ++ if (familyMember) { ++ rec = find_family(familyMember); ++ SkASSERT(rec); ++ } else { ++ rec = SkNEW(FamilyRec); ++ } ++ rec->fFaces[style] = this; ++ } ++ ++ virtual ~FamilyTypeface() { ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ // remove us from our family. If the family is now empty, we return ++ // that and then remove that family from the name list ++ FamilyRec* family = remove_from_family(this); ++ if (NULL != family) { ++ remove_from_names(family); ++ detach_and_delete_family(family); ++ } ++ } ++ ++ bool isSysFont() const { return fIsSysFont; } ++ ++ virtual SkStream* openStream() = 0; ++ virtual const char* getUniqueString() const = 0; ++ virtual const char* getFilePath() const = 0; ++ ++private: ++ bool fIsSysFont; ++ ++ typedef SkTypeface INHERITED; ++}; ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++class StreamTypeface : public FamilyTypeface { ++public: ++ StreamTypeface(Style style, bool sysFont, SkTypeface* familyMember, ++ SkStream* stream, bool isFixedWidth) ++ : INHERITED(style, sysFont, familyMember, isFixedWidth) { ++ SkASSERT(stream); ++ stream->ref(); ++ fStream = stream; ++ } ++ virtual ~StreamTypeface() { ++ fStream->unref(); ++ } ++ ++ // overrides ++ virtual SkStream* openStream() { ++ // we just ref our existing stream, since the caller will call unref() ++ // when they are through ++ fStream->ref(); ++ // must rewind each time, since the caller assumes a "new" stream ++ fStream->rewind(); ++ return fStream; ++ } ++ virtual const char* getUniqueString() const { return NULL; } ++ virtual const char* getFilePath() const { return NULL; } ++ ++private: ++ SkStream* fStream; ++ ++ typedef FamilyTypeface INHERITED; ++}; ++ ++class FileTypeface : public FamilyTypeface { ++public: ++ FileTypeface(Style style, bool sysFont, SkTypeface* familyMember, ++ const char path[], bool isFixedWidth) ++ : INHERITED(style, sysFont, familyMember, isFixedWidth) { ++ SkString fullpath; ++ ++ if (sysFont) { ++ GetFullPathForSysFonts(&fullpath, path); ++ path = fullpath.c_str(); ++ } ++ fPath.set(path); ++ } ++ ++ // overrides ++ virtual SkStream* openStream() { ++ SkStream* stream = SkNEW_ARGS(SkMMAPStream, (fPath.c_str())); ++ ++ // check for failure ++ if (stream->getLength() <= 0) { ++ SkDELETE(stream); ++ // maybe MMAP isn't supported. try FILE ++ stream = SkNEW_ARGS(SkFILEStream, (fPath.c_str())); ++ if (stream->getLength() <= 0) { ++ SkDELETE(stream); ++ stream = NULL; ++ } ++ } ++ return stream; ++ } ++ virtual const char* getUniqueString() const { ++ const char* str = strrchr(fPath.c_str(), '/'); ++ if (str) { ++ str += 1; // skip the '/' ++ } ++ return str; ++ } ++ virtual const char* getFilePath() const { ++ return fPath.c_str(); ++ } ++ ++private: ++ SkString fPath; ++ ++ typedef FamilyTypeface INHERITED; ++}; ++ ++/////////////////////////////////////////////////////////////////////////////// ++/////////////////////////////////////////////////////////////////////////////// ++ ++static bool get_name_and_style(const char path[], SkString* name, ++ SkTypeface::Style* style, ++ bool* isFixedWidth, bool isExpected) { ++ SkString fullpath; ++ GetFullPathForSysFonts(&fullpath, path); ++ ++ SkMMAPStream stream(fullpath.c_str()); ++ if (stream.getLength() > 0) { ++ find_name_and_attributes(&stream, name, style, isFixedWidth); ++ return true; ++ } ++ else { ++ SkFILEStream stream(fullpath.c_str()); ++ if (stream.getLength() > 0) { ++ find_name_and_attributes(&stream, name, style, isFixedWidth); ++ return true; ++ } ++ } ++ ++ if (isExpected) { ++ SkDebugf("---- failed to open <%s> as a font\n", fullpath.c_str()); ++ } ++ return false; ++} ++ ++// used to record our notion of the pre-existing fonts ++struct FontInitRec { ++ const char* fFileName; ++ const char* const* fNames; // null-terminated list ++}; ++ ++static const char* gSansNames[] = { ++ "sans-serif", "arial", "helvetica", "tahoma", "verdana", NULL ++}; ++ ++static const char* gSerifNames[] = { ++ "serif", "times", "times new roman", "palatino", "georgia", "baskerville", ++ "goudy", "fantasy", "cursive", "ITC Stone Serif", NULL ++}; ++ ++static const char* gMonoNames[] = { ++ "monospace", "courier", "courier new", "monaco", NULL ++}; ++ ++// deliberately empty, but we use the address to identify fallback fonts ++static const char* gFBNames[] = { NULL }; ++ ++/* Fonts must be grouped by family, with the first font in a family having the ++ list of names (even if that list is empty), and the following members having ++ null for the list. The names list must be NULL-terminated ++*/ ++static const FontInitRec gSystemFonts[] = { ++ { "DroidSans.ttf", gSansNames }, ++ { "DroidSans-Bold.ttf", NULL }, ++ { "DroidSerif-Regular.ttf", gSerifNames }, ++ { "DroidSerif-Bold.ttf", NULL }, ++ { "DroidSerif-Italic.ttf", NULL }, ++ { "DroidSerif-BoldItalic.ttf", NULL }, ++ { "DroidSansMono.ttf", gMonoNames }, ++ /* These are optional, and can be ignored if not found in the file system. ++ These are appended to gFallbackFonts[] as they are seen, so we list ++ them in the order we want them to be accessed by NextLogicalFont(). ++ */ ++ { "DroidSansArabic.ttf", gFBNames }, ++ { "DroidSansHebrew.ttf", gFBNames }, ++ { "DroidSansThai.ttf", gFBNames }, ++ { "MTLmr3m.ttf", gFBNames }, // Motoya Japanese Font ++ { "MTLc3m.ttf", gFBNames }, // Motoya Japanese Font ++ { "DroidSansJapanese.ttf", gFBNames }, ++ { "DroidSansFallback.ttf", gFBNames } ++}; ++ ++#define DEFAULT_NAMES gSansNames ++ ++// these globals are assigned (once) by load_system_fonts() ++static FamilyRec* gDefaultFamily; ++static SkTypeface* gDefaultNormal; ++ ++/* This is sized conservatively, assuming that it will never be a size issue. ++ It will be initialized in load_system_fonts(), and will be filled with the ++ fontIDs that can be used for fallback consideration, in sorted order (sorted ++ meaning element[0] should be used first, then element[1], etc. When we hit ++ a fontID==0 in the array, the list is done, hence our allocation size is ++ +1 the total number of possible system fonts. Also see NextLogicalFont(). ++ */ ++static uint32_t gFallbackFonts[SK_ARRAY_COUNT(gSystemFonts)+1]; ++ ++/* Called once (ensured by the sentinel check at the beginning of our body). ++ Initializes all the globals, and register the system fonts. ++ */ ++static void load_system_fonts() { ++ // check if we've already be called ++ if (NULL != gDefaultNormal) { ++ return; ++ } ++ ++ const FontInitRec* rec = gSystemFonts; ++ SkTypeface* firstInFamily = NULL; ++ int fallbackCount = 0; ++ ++ for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { ++ // if we're the first in a new family, clear firstInFamily ++ if (rec[i].fNames != NULL) { ++ firstInFamily = NULL; ++ } ++ ++ bool isFixedWidth; ++ SkString name; ++ SkTypeface::Style style; ++ ++ // we expect all the fonts, except the "fallback" fonts ++ bool isExpected = (rec[i].fNames != gFBNames); ++ if (!get_name_and_style(rec[i].fFileName, &name, &style, ++ &isFixedWidth, isExpected)) { ++ continue; ++ } ++ ++ SkTypeface* tf = SkNEW_ARGS(FileTypeface, ++ (style, ++ true, // system-font (cannot delete) ++ firstInFamily, // what family to join ++ rec[i].fFileName, ++ isFixedWidth) // filename ++ ); ++ ++ if (rec[i].fNames != NULL) { ++ // see if this is one of our fallback fonts ++ if (rec[i].fNames == gFBNames) { ++ // SkDebugf("---- adding %s as fallback[%d] fontID %d\n", ++ // rec[i].fFileName, fallbackCount, tf->uniqueID()); ++ gFallbackFonts[fallbackCount++] = tf->uniqueID(); ++ } ++ ++ firstInFamily = tf; ++ FamilyRec* family = find_family(tf); ++ const char* const* names = rec[i].fNames; ++ ++ // record the default family if this is it ++ if (names == DEFAULT_NAMES) { ++ gDefaultFamily = family; ++ } ++ // add the names to map to this family ++ while (*names) { ++ add_name(*names, family); ++ names += 1; ++ } ++ } ++ } ++ ++ // do this after all fonts are loaded. This is our default font, and it ++ // acts as a sentinel so we only execute load_system_fonts() once ++ gDefaultNormal = find_best_face(gDefaultFamily, SkTypeface::kNormal); ++ // now terminate our fallback list with the sentinel value ++ gFallbackFonts[fallbackCount] = 0; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) { ++ const char* name = ((FamilyTypeface*)face)->getUniqueString(); ++ ++ stream->write8((uint8_t)face->style()); ++ ++ if (NULL == name || 0 == *name) { ++ stream->writePackedUInt(0); ++// SkDebugf("--- fonthost serialize null\n"); ++ } else { ++ uint32_t len = strlen(name); ++ stream->writePackedUInt(len); ++ stream->write(name, len); ++// SkDebugf("--- fonthost serialize <%s> %d\n", name, face->style()); ++ } ++} ++ ++SkTypeface* SkFontHost::Deserialize(SkStream* stream) { ++ load_system_fonts(); ++ ++ int style = stream->readU8(); ++ ++ int len = stream->readPackedUInt(); ++ if (len > 0) { ++ SkString str; ++ str.resize(len); ++ stream->read(str.writable_str(), len); ++ ++ const FontInitRec* rec = gSystemFonts; ++ for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { ++ if (strcmp(rec[i].fFileName, str.c_str()) == 0) { ++ // backup until we hit the fNames ++ for (int j = i; j >= 0; --j) { ++ if (rec[j].fNames != NULL) { ++ return SkFontHost::CreateTypeface(NULL, ++ rec[j].fNames[0], (SkTypeface::Style)style); ++ } ++ } ++ } ++ } ++ } ++ return NULL; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace, ++ const char familyName[], ++ SkTypeface::Style style) { ++ load_system_fonts(); ++ ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ // clip to legal style bits ++ style = (SkTypeface::Style)(style & SkTypeface::kBoldItalic); ++ ++ SkTypeface* tf = NULL; ++ ++ if (NULL != familyFace) { ++ tf = find_typeface(familyFace, style); ++ } else if (NULL != familyName) { ++// SkDebugf("======= familyName <%s>\n", familyName); ++ tf = find_typeface(familyName, style); ++ } ++ ++ if (NULL == tf) { ++ tf = find_best_face(gDefaultFamily, style); ++ } ++ ++ // we ref(), since the symantic is to return a new instance ++ tf->ref(); ++ return tf; ++} ++ ++SkStream* SkFontHost::OpenStream(uint32_t fontID) { ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ FamilyTypeface* tf = (FamilyTypeface*)find_from_uniqueID(fontID); ++ SkStream* stream = tf ? tf->openStream() : NULL; ++ ++ if (stream && stream->getLength() == 0) { ++ stream->unref(); ++ stream = NULL; ++ } ++ return stream; ++} ++ ++size_t SkFontHost::GetFileName(SkFontID fontID, char path[], size_t length, ++ int32_t* index) { ++ SkAutoMutexAcquire ac(gFamilyMutex); ++ ++ FamilyTypeface* tf = (FamilyTypeface*)find_from_uniqueID(fontID); ++ const char* src = tf ? tf->getFilePath() : NULL; ++ ++ if (src) { ++ size_t size = strlen(src); ++ if (path) { ++ memcpy(path, src, SkMin32(size, length)); ++ } ++ if (index) { ++ *index = 0; // we don't have collections (yet) ++ } ++ return size; ++ } else { ++ return 0; ++ } ++} ++ ++SkFontID SkFontHost::NextLogicalFont(SkFontID currFontID, SkFontID origFontID) { ++ load_system_fonts(); ++ ++ /* First see if fontID is already one of our fallbacks. If so, return ++ its successor. If fontID is not in our list, then return the first one ++ in our list. Note: list is zero-terminated, and returning zero means ++ we have no more fonts to use for fallbacks. ++ */ ++ const uint32_t* list = gFallbackFonts; ++ for (int i = 0; list[i] != 0; i++) { ++ if (list[i] == currFontID) { ++ return list[i+1]; ++ } ++ } ++ return list[0]; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// ++ ++SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) { ++ if (NULL == stream || stream->getLength() <= 0) { ++ return NULL; ++ } ++ ++ bool isFixedWidth; ++ SkString name; ++ SkTypeface::Style style; ++ find_name_and_attributes(stream, &name, &style, &isFixedWidth); ++ ++ if (!name.isEmpty()) { ++ return SkNEW_ARGS(StreamTypeface, (style, false, NULL, stream, isFixedWidth)); ++ } else { ++ return NULL; ++ } ++} ++ ++SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { ++ SkStream* stream = SkNEW_ARGS(SkMMAPStream, (path)); ++ SkTypeface* face = SkFontHost::CreateTypefaceFromStream(stream); ++ // since we created the stream, we let go of our ref() here ++ stream->unref(); ++ return face; ++} ++ ++/////////////////////////////////////////////////////////////////////////////// +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0007-Bug-848491-Re-apply-bug-687188-Expand-the-gradient-c.patch b/gfx/skia/patches/archive/0007-Bug-848491-Re-apply-bug-687188-Expand-the-gradient-c.patch new file mode 100644 index 0000000000..73bca9a48d --- /dev/null +++ b/gfx/skia/patches/archive/0007-Bug-848491-Re-apply-bug-687188-Expand-the-gradient-c.patch @@ -0,0 +1,168 @@ +From: George Wright +Date: Thu, 25 Apr 2013 20:47:06 -0400 +Subject: Bug 848491 - Re-apply bug 687188 - Expand the gradient cache by 2 to store 0/1 colour stop values for clamping. + + +diff --git a/gfx/skia/src/effects/gradients/SkGradientShader.cpp b/gfx/skia/src/effects/gradients/SkGradientShader.cpp +index 684355d..27a9c46 100644 +--- a/gfx/skia/src/effects/gradients/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/gradients/SkGradientShader.cpp +@@ -453,15 +453,15 @@ const uint16_t* SkGradientShaderBase::getCache16() const { + + const SkPMColor* SkGradientShaderBase::getCache32() const { + if (fCache32 == NULL) { +- // double the count for dither entries +- const int entryCount = kCache32Count * 4; ++ // double the count for dither entries, and have an extra two entries for clamp values ++ const int entryCount = kCache32Count * 4 + 2; + const size_t allocSize = sizeof(SkPMColor) * entryCount; + + if (NULL == fCache32PixelRef) { + fCache32PixelRef = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + } +- fCache32 = (SkPMColor*)fCache32PixelRef->getAddr(); ++ fCache32 = (SkPMColor*)fCache32PixelRef->getAddr() + 1; + if (fColorCount == 2) { + Build32bitCache(fCache32, fOrigColors[0], fOrigColors[1], + kCache32Count, fCacheAlpha); +@@ -484,7 +484,7 @@ const SkPMColor* SkGradientShaderBase::getCache32() const { + SkMallocPixelRef* newPR = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + SkPMColor* linear = fCache32; // just computed linear data +- SkPMColor* mapped = (SkPMColor*)newPR->getAddr(); // storage for mapped data ++ SkPMColor* mapped = (SkPMColor*)newPR->getAddr() + 1; // storage for mapped data + SkUnitMapper* map = fMapper; + for (int i = 0; i < kCache32Count; i++) { + int index = map->mapUnit16((i << 8) | i) >> 8; +@@ -495,9 +495,21 @@ const SkPMColor* SkGradientShaderBase::getCache32() const { + } + fCache32PixelRef->unref(); + fCache32PixelRef = newPR; +- fCache32 = (SkPMColor*)newPR->getAddr(); ++ fCache32 = (SkPMColor*)newPR->getAddr() + 1; + } + } ++ ++ // Write the clamp colours into the first and last entries of fCache32 ++ fCache32[kCache32ClampLower] = SkPackARGB32(fCacheAlpha, ++ SkColorGetR(fOrigColors[0]), ++ SkColorGetG(fOrigColors[0]), ++ SkColorGetB(fOrigColors[0])); ++ ++ fCache32[kCache32ClampUpper] = SkPackARGB32(fCacheAlpha, ++ SkColorGetR(fOrigColors[fColorCount - 1]), ++ SkColorGetG(fOrigColors[fColorCount - 1]), ++ SkColorGetB(fOrigColors[fColorCount - 1])); ++ + return fCache32; + } + +diff --git a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h +index 729ce4e..2cb6a9d 100644 +--- a/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h ++++ b/gfx/skia/src/effects/gradients/SkGradientShaderPriv.h +@@ -86,6 +86,9 @@ public: + /// if dithering is disabled. + kDitherStride32 = kCache32Count, + kDitherStride16 = kCache16Count, ++ ++ kCache32ClampLower = -1, ++ kCache32ClampUpper = kCache32Count * 4 + }; + + +diff --git a/gfx/skia/src/effects/gradients/SkLinearGradient.cpp b/gfx/skia/src/effects/gradients/SkLinearGradient.cpp +index e0f216c..40ab918 100644 +--- a/gfx/skia/src/effects/gradients/SkLinearGradient.cpp ++++ b/gfx/skia/src/effects/gradients/SkLinearGradient.cpp +@@ -127,6 +127,17 @@ void shadeSpan_linear_vertical_lerp(TileProc proc, SkFixed dx, SkFixed fx, + SkPMColor* SK_RESTRICT dstC, + const SkPMColor* SK_RESTRICT cache, + int toggle, int count) { ++ if (proc == clamp_tileproc) { ++ // No need to lerp or dither for clamp values ++ if (fx < 0) { ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampLower], count); ++ return; ++ } else if (fx > 0xffff) { ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampUpper], count); ++ return; ++ } ++ } ++ + // We're a vertical gradient, so no change in a span. + // If colors change sharply across the gradient, dithering is + // insufficient (it subsamples the color space) and we need to lerp. +@@ -154,10 +165,7 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, + range.init(fx, dx, count, 0, SkGradientShaderBase::kCache32Count - 1); + + if ((count = range.fCount0) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV0], +- cache[next_dither_toggle(toggle) + range.fV0], +- count); ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampLower], count); + dstC += count; + } + if ((count = range.fCount1) > 0) { +@@ -176,10 +184,7 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, + } + } + if ((count = range.fCount2) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV1], +- cache[next_dither_toggle(toggle) + range.fV1], +- count); ++ sk_memset32(dstC, cache[SkGradientShaderBase::kCache32ClampUpper], count); + } + } + +diff --git a/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp b/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp +index abd974b..601fff4 100644 +--- a/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp ++++ b/gfx/skia/src/effects/gradients/SkTwoPointConicalGradient.cpp +@@ -124,10 +124,14 @@ static void twopoint_clamp(TwoPtRadial* rec, SkPMColor* SK_RESTRICT dstC, + if (TwoPtRadial::DontDrawT(t)) { + *dstC++ = 0; + } else { +- SkFixed index = SkClampMax(t, 0xFFFF); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[toggle + +- (index >> SkGradientShaderBase::kCache32Shift)]; ++ if (t < 0) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampLower]; ++ } else if (t > 0xFFFF) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampUpper]; ++ } else { ++ SkASSERT(t <= 0xFFFF); ++ *dstC++ = cache[t >> SkGradientShaderBase::kCache32Shift]; ++ } + } + toggle = next_dither_toggle(toggle); + } +diff --git a/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp b/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp +index f70b67d..ec2ae75 100644 +--- a/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp ++++ b/gfx/skia/src/effects/gradients/SkTwoPointRadialGradient.cpp +@@ -120,9 +120,14 @@ void shadeSpan_twopoint_clamp(SkScalar fx, SkScalar dx, + for (; count > 0; --count) { + SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, + fOneOverTwoA, posRoot); +- SkFixed index = SkClampMax(t, 0xFFFF); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> SkGradientShaderBase::kCache32Shift]; ++ if (t < 0) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampLower]; ++ } else if (t > 0xFFFF) { ++ *dstC++ = cache[SkGradientShaderBase::kCache32ClampUpper]; ++ } else { ++ SkASSERT(t <= 0xFFFF); ++ *dstC++ = cache[t >> SkGradientShaderBase::kCache32Shift]; ++ } + fx += dx; + fy += dy; + b += db; +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0008-Bug-687188-Skia-radial-gradients.patch b/gfx/skia/patches/archive/0008-Bug-687188-Skia-radial-gradients.patch new file mode 100644 index 0000000000..0f60dbd8ea --- /dev/null +++ b/gfx/skia/patches/archive/0008-Bug-687188-Skia-radial-gradients.patch @@ -0,0 +1,173 @@ +From f941ea32e44a2436d235e83ef1a434289a9d9c1e Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Wed, 23 May 2012 11:40:25 -0400 +Subject: [PATCH 08/10] Bug 755869 - [11] Re-apply bug 687188 - Skia + radial gradients should use the 0/1 color stop values + for clamping. r=mattwoodrow + +--- + gfx/skia/src/effects/SkGradientShader.cpp | 76 +++++++++++++++++++++++------ + 1 files changed, 61 insertions(+), 15 deletions(-) + +diff --git a/gfx/skia/src/effects/SkGradientShader.cpp b/gfx/skia/src/effects/SkGradientShader.cpp +index 59ba48c..ea05a39 100644 +--- a/gfx/skia/src/effects/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/SkGradientShader.cpp +@@ -204,6 +204,7 @@ private: + mutable SkMallocPixelRef* fCache32PixelRef; + mutable unsigned fCacheAlpha; // the alpha value we used when we computed the cache. larger than 8bits so we can store uninitialized value + ++ static SkPMColor PremultiplyColor(SkColor c0, U8CPU alpha); + static void Build16bitCache(uint16_t[], SkColor c0, SkColor c1, int count); + static void Build32bitCache(SkPMColor[], SkColor c0, SkColor c1, int count, + U8CPU alpha); +@@ -507,6 +508,21 @@ static inline U8CPU dither_ceil_fixed_to_8(SkFixed n) { + return ((n << 1) - (n | (n >> 8))) >> 8; + } + ++SkPMColor Gradient_Shader::PremultiplyColor(SkColor c0, U8CPU paintAlpha) ++{ ++ SkFixed a = SkMulDiv255Round(SkColorGetA(c0), paintAlpha); ++ SkFixed r = SkColorGetR(c0); ++ SkFixed g = SkColorGetG(c0); ++ SkFixed b = SkColorGetB(c0); ++ ++ a = SkIntToFixed(a) + 0x8000; ++ r = SkIntToFixed(r) + 0x8000; ++ g = SkIntToFixed(g) + 0x8000; ++ b = SkIntToFixed(b) + 0x8000; ++ ++ return SkPremultiplyARGBInline(a >> 16, r >> 16, g >> 16, b >> 16); ++} ++ + void Gradient_Shader::Build32bitCache(SkPMColor cache[], SkColor c0, SkColor c1, + int count, U8CPU paintAlpha) { + SkASSERT(count > 1); +@@ -628,14 +644,14 @@ static void complete_32bit_cache(SkPMColor* cache, int stride) { + const SkPMColor* Gradient_Shader::getCache32() const { + if (fCache32 == NULL) { + // double the count for dither entries +- const int entryCount = kCache32Count * 2; ++ const int entryCount = kCache32Count * 2 + 2; + const size_t allocSize = sizeof(SkPMColor) * entryCount; + + if (NULL == fCache32PixelRef) { + fCache32PixelRef = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + } +- fCache32 = (SkPMColor*)fCache32PixelRef->getAddr(); ++ fCache32 = (SkPMColor*)fCache32PixelRef->getAddr() + 1; + if (fColorCount == 2) { + Build32bitCache(fCache32, fOrigColors[0], fOrigColors[1], + kGradient32Length, fCacheAlpha); +@@ -659,7 +675,7 @@ const SkPMColor* Gradient_Shader::getCache32() const { + SkMallocPixelRef* newPR = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + SkPMColor* linear = fCache32; // just computed linear data +- SkPMColor* mapped = (SkPMColor*)newPR->getAddr(); // storage for mapped data ++ SkPMColor* mapped = (SkPMColor*)newPR->getAddr() + 1; // storage for mapped data + SkUnitMapper* map = fMapper; + for (int i = 0; i < kGradient32Length; i++) { + int index = map->mapUnit16((i << 8) | i) >> 8; +@@ -668,10 +684,13 @@ const SkPMColor* Gradient_Shader::getCache32() const { + } + fCache32PixelRef->unref(); + fCache32PixelRef = newPR; +- fCache32 = (SkPMColor*)newPR->getAddr(); ++ fCache32 = (SkPMColor*)newPR->getAddr() + 1; + } + complete_32bit_cache(fCache32, kCache32Count); + } ++ //Write the clamp colours into the first and last entries of fCache32 ++ fCache32[-1] = PremultiplyColor(fOrigColors[0], fCacheAlpha); ++ fCache32[kCache32Count * 2] = PremultiplyColor(fOrigColors[fColorCount - 1], fCacheAlpha); + return fCache32; + } + +@@ -857,6 +876,18 @@ void shadeSpan_linear_vertical(TileProc proc, SkFixed dx, SkFixed fx, + SkPMColor* SK_RESTRICT dstC, + const SkPMColor* SK_RESTRICT cache, + int toggle, int count) { ++ if (proc == clamp_tileproc) { ++ // Read out clamp values from beginning/end of the cache. No need to lerp ++ // or dither ++ if (fx < 0) { ++ sk_memset32(dstC, cache[-1], count); ++ return; ++ } else if (fx > 0xFFFF) { ++ sk_memset32(dstC, cache[Gradient_Shader::kCache32Count * 2], count); ++ return; ++ } ++ } ++ + // We're a vertical gradient, so no change in a span. + // If colors change sharply across the gradient, dithering is + // insufficient (it subsamples the color space) and we need to lerp. +@@ -875,6 +906,18 @@ void shadeSpan_linear_vertical_lerp(TileProc proc, SkFixed dx, SkFixed fx, + SkPMColor* SK_RESTRICT dstC, + const SkPMColor* SK_RESTRICT cache, + int toggle, int count) { ++ if (proc == clamp_tileproc) { ++ // Read out clamp values from beginning/end of the cache. No need to lerp ++ // or dither ++ if (fx < 0) { ++ sk_memset32(dstC, cache[-1], count); ++ return; ++ } else if (fx > 0xFFFF) { ++ sk_memset32(dstC, cache[Gradient_Shader::kCache32Count * 2], count); ++ return; ++ } ++ } ++ + // We're a vertical gradient, so no change in a span. + // If colors change sharply across the gradient, dithering is + // insufficient (it subsamples the color space) and we need to lerp. +@@ -900,10 +943,8 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, + range.init(fx, dx, count, 0, Gradient_Shader::kGradient32Length); + + if ((count = range.fCount0) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV0], +- cache[(toggle ^ Gradient_Shader::kDitherStride32) + range.fV0], +- count); ++ // Shouldn't be any need to dither for clamping? ++ sk_memset32(dstC, cache[-1], count); + dstC += count; + } + if ((count = range.fCount1) > 0) { +@@ -922,10 +963,8 @@ void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, + } + } + if ((count = range.fCount2) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV1], +- cache[(toggle ^ Gradient_Shader::kDitherStride32) + range.fV1], +- count); ++ // Shouldn't be any need to dither for clamping? ++ sk_memset32(dstC, cache[Gradient_Shader::kCache32Count * 2], count); + } + } + +@@ -1796,9 +1835,16 @@ void shadeSpan_twopoint_clamp(SkScalar fx, SkScalar dx, + for (; count > 0; --count) { + SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, + fOneOverTwoA, posRoot); +- SkFixed index = SkClampMax(t, 0xFFFF); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> Gradient_Shader::kCache32Shift]; ++ ++ if (t < 0) { ++ *dstC++ = cache[-1]; ++ } else if (t > 0xFFFF) { ++ *dstC++ = cache[Gradient_Shader::kCache32Count * 2]; ++ } else { ++ SkASSERT(t <= 0xFFFF); ++ *dstC++ = cache[t >> Gradient_Shader::kCache32Shift]; ++ } ++ + fx += dx; + fy += dy; + b += db; +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0008-Bug-848491-Re-apply-759683-Handle-compilers-that-don.patch b/gfx/skia/patches/archive/0008-Bug-848491-Re-apply-759683-Handle-compilers-that-don.patch new file mode 100644 index 0000000000..58961d6e06 --- /dev/null +++ b/gfx/skia/patches/archive/0008-Bug-848491-Re-apply-759683-Handle-compilers-that-don.patch @@ -0,0 +1,35 @@ +From: George Wright +Date: Thu, 25 Apr 2013 20:49:45 -0400 +Subject: Bug 848491 - Re-apply 759683 - Handle compilers that don't support SSSE3 intrinsics + + +diff --git a/gfx/skia/src/opts/opts_check_SSE2.cpp b/gfx/skia/src/opts/opts_check_SSE2.cpp +index 6370058..18f68d6 100644 +--- a/gfx/skia/src/opts/opts_check_SSE2.cpp ++++ b/gfx/skia/src/opts/opts_check_SSE2.cpp +@@ -86,9 +86,13 @@ static inline bool hasSSSE3() { + #else + + static inline bool hasSSSE3() { ++#if defined(SK_BUILD_SSSE3) + int cpu_info[4] = { 0 }; + getcpuid(1, cpu_info); + return (cpu_info[2] & 0x200) != 0; ++#else ++ return false; ++#endif + } + #endif + +@@ -104,7 +108,7 @@ static bool cachedHasSSSE3() { + + void SkBitmapProcState::platformProcs() { + if (cachedHasSSSE3()) { +-#if !defined(SK_BUILD_FOR_ANDROID) ++#if !defined(SK_BUILD_FOR_ANDROID) && defined(SK_BUILD_SSSE3) + // Disable SSSE3 optimization for Android x86 + if (fSampleProc32 == S32_opaque_D32_filter_DX) { + fSampleProc32 = S32_opaque_D32_filter_DX_SSSE3; +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0009-Bug-755869-FreeBSD-Hurd.patch b/gfx/skia/patches/archive/0009-Bug-755869-FreeBSD-Hurd.patch new file mode 100644 index 0000000000..1e9a93f20a --- /dev/null +++ b/gfx/skia/patches/archive/0009-Bug-755869-FreeBSD-Hurd.patch @@ -0,0 +1,28 @@ +From df3be24040f7cb2f9c7ed86ad3e47206630e885f Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Wed, 23 May 2012 14:49:57 -0400 +Subject: [PATCH 09/10] Bug 755869 - [12] Re-apply bug 749533 - Add + support for GNU/kFreeBSD and Hurd in Skia. + r=mattwoodrow + +--- + gfx/skia/include/core/SkPreConfig.h | 3 ++- + 1 files changed, 2 insertions(+), 1 deletions(-) + +diff --git a/gfx/skia/include/core/SkPreConfig.h b/gfx/skia/include/core/SkPreConfig.h +index 46c6929..16c4d6c 100644 +--- a/gfx/skia/include/core/SkPreConfig.h ++++ b/gfx/skia/include/core/SkPreConfig.h +@@ -35,7 +35,8 @@ + #elif defined(ANDROID) + #define SK_BUILD_FOR_ANDROID + #elif defined(linux) || defined(__FreeBSD__) || defined(__OpenBSD__) || \ +- defined(__sun) || defined(__NetBSD__) || defined(__DragonFly__) ++ defined(__sun) || defined(__NetBSD__) || defined(__DragonFly__) || \ ++ defined(__GLIBC__) || defined(__GNU__) + #define SK_BUILD_FOR_UNIX + #elif TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR + #define SK_BUILD_FOR_IOS +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0009-Bug-777614-Re-apply-759683-Handle-compilers-that-don.patch b/gfx/skia/patches/archive/0009-Bug-777614-Re-apply-759683-Handle-compilers-that-don.patch new file mode 100644 index 0000000000..1da208ed18 --- /dev/null +++ b/gfx/skia/patches/archive/0009-Bug-777614-Re-apply-759683-Handle-compilers-that-don.patch @@ -0,0 +1,40 @@ +From 2c5a8cebc806ed287ce7c3723ea64a233266cd9e Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Thu, 13 Sep 2012 14:55:33 -0400 +Subject: [PATCH 9/9] Bug 777614 - Re-apply 759683 - Handle compilers that + don't support SSSE3 intrinsics r=nrc + +--- + gfx/skia/src/opts/opts_check_SSE2.cpp | 6 +++++- + 1 file changed, 5 insertions(+), 1 deletion(-) + +diff --git a/gfx/skia/src/opts/opts_check_SSE2.cpp b/gfx/skia/src/opts/opts_check_SSE2.cpp +index 96d0dea..add6d5f 100644 +--- a/gfx/skia/src/opts/opts_check_SSE2.cpp ++++ b/gfx/skia/src/opts/opts_check_SSE2.cpp +@@ -86,9 +86,13 @@ static inline bool hasSSSE3() { + #else + + static inline bool hasSSSE3() { ++#if defined(SK_BUILD_SSSE3) + int cpu_info[4] = { 0 }; + getcpuid(1, cpu_info); + return (cpu_info[2] & 0x200) != 0; ++#else ++ return false; ++#endif + } + #endif + +@@ -104,7 +108,7 @@ static bool cachedHasSSSE3() { + + void SkBitmapProcState::platformProcs() { + if (cachedHasSSSE3()) { +-#if !defined(SK_BUILD_FOR_ANDROID) ++#if !defined(SK_BUILD_FOR_ANDROID) && defined(SK_BUILD_SSSE3) + // Disable SSSE3 optimization for Android x86 + if (fSampleProc32 == S32_opaque_D32_filter_DX) { + fSampleProc32 = S32_opaque_D32_filter_DX_SSSE3; +-- +1.7.11.4 + diff --git a/gfx/skia/patches/archive/0009-Bug-848491-Re-apply-bug-751418-Add-our-own-GrUserCon.patch b/gfx/skia/patches/archive/0009-Bug-848491-Re-apply-bug-751418-Add-our-own-GrUserCon.patch new file mode 100644 index 0000000000..9778015c4f --- /dev/null +++ b/gfx/skia/patches/archive/0009-Bug-848491-Re-apply-bug-751418-Add-our-own-GrUserCon.patch @@ -0,0 +1,23 @@ +From: George Wright +Date: Thu, 25 Apr 2013 20:52:32 -0400 +Subject: Bug 848491 - Re-apply bug 751418 - Add our own GrUserConfig + + +diff --git a/gfx/skia/include/gpu/GrUserConfig.h b/gfx/skia/include/gpu/GrUserConfig.h +index 11d4feb..77ab850 100644 +--- a/gfx/skia/include/gpu/GrUserConfig.h ++++ b/gfx/skia/include/gpu/GrUserConfig.h +@@ -43,6 +43,10 @@ + */ + //#define GR_DEFAULT_TEXTURE_CACHE_MB_LIMIT 96 + ++/* ++ * This allows us to set a callback to be called before each GL call to ensure ++ * that our context is set correctly ++ */ + #define GR_GL_PER_GL_FUNC_CALLBACK 1 + + #endif +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0010-Bug-689069-ARM-Opts.patch b/gfx/skia/patches/archive/0010-Bug-689069-ARM-Opts.patch new file mode 100644 index 0000000000..bd6604b4bd --- /dev/null +++ b/gfx/skia/patches/archive/0010-Bug-689069-ARM-Opts.patch @@ -0,0 +1,36 @@ +From dc1292fc8c2b9da900ebcac953120eaffd0d329e Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Wed, 23 May 2012 14:52:36 -0400 +Subject: [PATCH 10/10] Bug 755869 - [13] Re-apply bug 750733 - Use + handles in API object hooks where possible + r=mattwoodrow + +--- + gfx/skia/src/xml/SkJS.cpp | 4 ++-- + 1 files changed, 2 insertions(+), 2 deletions(-) + +diff --git a/gfx/skia/src/xml/SkJS.cpp b/gfx/skia/src/xml/SkJS.cpp +index f2e7a83..b2717d7 100644 +--- a/gfx/skia/src/xml/SkJS.cpp ++++ b/gfx/skia/src/xml/SkJS.cpp +@@ -74,7 +74,7 @@ extern "C" { + #endif + + static bool +-global_enumerate(JSContext *cx, JSObject *obj) ++global_enumerate(JSContext *cx, JSHandleObject *obj) + { + #ifdef LAZY_STANDARD_CLASSES + return JS_EnumerateStandardClasses(cx, obj); +@@ -84,7 +84,7 @@ global_enumerate(JSContext *cx, JSObject *obj) + } + + static bool +-global_resolve(JSContext *cx, JSObject *obj, jsval id, uintN flags, JSObject **objp) ++global_resolve(JSContext *cx, JSHandleObject obj, JSHandleId id, unsigned flags, JSObject **objp) + { + #ifdef LAZY_STANDARD_CLASSES + if ((flags & JSRESOLVE_ASSIGNING) == 0) { +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0010-Bug-836892-Add-new-blending-modes-to-SkXfermode.patch b/gfx/skia/patches/archive/0010-Bug-836892-Add-new-blending-modes-to-SkXfermode.patch new file mode 100644 index 0000000000..a446037de0 --- /dev/null +++ b/gfx/skia/patches/archive/0010-Bug-836892-Add-new-blending-modes-to-SkXfermode.patch @@ -0,0 +1,698 @@ +# HG changeset patch +# User Rik Cabanier +# Date 1360273929 -46800 +# Node ID 3ac8edca3a03b3d22240b5a5b95ae3b5ada9877d +# Parent cbb67fe70b864b36165061e1fd3b083cd09af087 +Bug 836892 - Add new blending modes to SkXfermode. r=gw280 + +diff --git a/gfx/skia/include/core/SkXfermode.h b/gfx/skia/include/core/SkXfermode.h +--- a/gfx/skia/include/core/SkXfermode.h ++++ b/gfx/skia/include/core/SkXfermode.h +@@ -96,33 +96,37 @@ public: + kDstOut_Mode, //!< [Da * (1 - Sa), Dc * (1 - Sa)] + kSrcATop_Mode, //!< [Da, Sc * Da + (1 - Sa) * Dc] + kDstATop_Mode, //!< [Sa, Sa * Dc + Sc * (1 - Da)] + kXor_Mode, //!< [Sa + Da - 2 * Sa * Da, Sc * (1 - Da) + (1 - Sa) * Dc] + + // all remaining modes are defined in the SVG Compositing standard + // http://www.w3.org/TR/2009/WD-SVGCompositing-20090430/ + kPlus_Mode, +- kMultiply_Mode, + + // all above modes can be expressed as pair of src/dst Coeffs + kCoeffModesCnt, + +- kScreen_Mode = kCoeffModesCnt, ++ kMultiply_Mode = kCoeffModesCnt, ++ kScreen_Mode, + kOverlay_Mode, + kDarken_Mode, + kLighten_Mode, + kColorDodge_Mode, + kColorBurn_Mode, + kHardLight_Mode, + kSoftLight_Mode, + kDifference_Mode, + kExclusion_Mode, ++ kHue_Mode, ++ kSaturation_Mode, ++ kColor_Mode, ++ kLuminosity_Mode, + +- kLastMode = kExclusion_Mode ++ kLastMode = kLuminosity_Mode + }; + + /** + * If the xfermode is one of the modes in the Mode enum, then asMode() + * returns true and sets (if not null) mode accordingly. Otherwise it + * returns false and ignores the mode parameter. + */ + virtual bool asMode(Mode* mode); +diff --git a/gfx/skia/src/core/SkXfermode.cpp b/gfx/skia/src/core/SkXfermode.cpp +--- a/gfx/skia/src/core/SkXfermode.cpp ++++ b/gfx/skia/src/core/SkXfermode.cpp +@@ -7,16 +7,18 @@ + */ + + + #include "SkXfermode.h" + #include "SkColorPriv.h" + #include "SkFlattenableBuffers.h" + #include "SkMathPriv.h" + ++#include ++ + SK_DEFINE_INST_COUNT(SkXfermode) + + #define SkAlphaMulAlpha(a, b) SkMulDiv255Round(a, b) + + #if 0 + // idea for higher precision blends in xfer procs (and slightly faster) + // see DstATop as a probable caller + static U8CPU mulmuldiv255round(U8CPU a, U8CPU b, U8CPU c, U8CPU d) { +@@ -176,244 +178,439 @@ static SkPMColor xor_modeproc(SkPMColor + static SkPMColor plus_modeproc(SkPMColor src, SkPMColor dst) { + unsigned b = saturated_add(SkGetPackedB32(src), SkGetPackedB32(dst)); + unsigned g = saturated_add(SkGetPackedG32(src), SkGetPackedG32(dst)); + unsigned r = saturated_add(SkGetPackedR32(src), SkGetPackedR32(dst)); + unsigned a = saturated_add(SkGetPackedA32(src), SkGetPackedA32(dst)); + return SkPackARGB32(a, r, g, b); + } + ++static inline int srcover_byte(int a, int b) { ++ return a + b - SkAlphaMulAlpha(a, b); ++} ++ ++#define blendfunc_byte(sc, dc, sa, da, blendfunc) \ ++ clamp_div255round(sc * (255 - da) + dc * (255 - sa) + blendfunc(sc, dc, sa, da)) ++ + // kMultiply_Mode ++static inline int multiply_byte(int sc, int dc, int sa, int da) { ++ return sc * dc; ++} + static SkPMColor multiply_modeproc(SkPMColor src, SkPMColor dst) { +- int a = SkAlphaMulAlpha(SkGetPackedA32(src), SkGetPackedA32(dst)); +- int r = SkAlphaMulAlpha(SkGetPackedR32(src), SkGetPackedR32(dst)); +- int g = SkAlphaMulAlpha(SkGetPackedG32(src), SkGetPackedG32(dst)); +- int b = SkAlphaMulAlpha(SkGetPackedB32(src), SkGetPackedB32(dst)); ++ int sa = SkGetPackedA32(src); ++ int da = SkGetPackedA32(dst); ++ int a = srcover_byte(sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, multiply_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, multiply_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, multiply_byte); + return SkPackARGB32(a, r, g, b); + } + + // kScreen_Mode +-static inline int srcover_byte(int a, int b) { +- return a + b - SkAlphaMulAlpha(a, b); ++static inline int screen_byte(int sc, int dc, int sa, int da) { ++ return sc * da + sa * dc - sc * dc; + } + static SkPMColor screen_modeproc(SkPMColor src, SkPMColor dst) { +- int a = srcover_byte(SkGetPackedA32(src), SkGetPackedA32(dst)); +- int r = srcover_byte(SkGetPackedR32(src), SkGetPackedR32(dst)); +- int g = srcover_byte(SkGetPackedG32(src), SkGetPackedG32(dst)); +- int b = srcover_byte(SkGetPackedB32(src), SkGetPackedB32(dst)); ++ int sa = SkGetPackedA32(src); ++ int da = SkGetPackedA32(dst); ++ int a = srcover_byte(sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, screen_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, screen_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, screen_byte); ++ return SkPackARGB32(a, r, g, b); ++} ++ ++// kHardLight_Mode ++static inline int hardlight_byte(int sc, int dc, int sa, int da) { ++ if(!sa || !da) ++ return sc * da; ++ float Sc = (float)sc/sa; ++ float Dc = (float)dc/da; ++ if(Sc <= 0.5) ++ Sc *= 2 * Dc; ++ else ++ Sc = -1 + 2 * Sc + 2 * Dc - 2 * Sc * Dc; ++ ++ return Sc * sa * da; ++} ++static SkPMColor hardlight_modeproc(SkPMColor src, SkPMColor dst) { ++ int sa = SkGetPackedA32(src); ++ int da = SkGetPackedA32(dst); ++ int a = srcover_byte(sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, hardlight_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, hardlight_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, hardlight_byte); + return SkPackARGB32(a, r, g, b); + } + + // kOverlay_Mode + static inline int overlay_byte(int sc, int dc, int sa, int da) { +- int tmp = sc * (255 - da) + dc * (255 - sa); +- int rc; +- if (2 * dc <= da) { +- rc = 2 * sc * dc; +- } else { +- rc = sa * da - 2 * (da - dc) * (sa - sc); +- } +- return clamp_div255round(rc + tmp); ++ return hardlight_byte(dc, sc, da, sa); + } + static SkPMColor overlay_modeproc(SkPMColor src, SkPMColor dst) { + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = overlay_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = overlay_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = overlay_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, overlay_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, overlay_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, overlay_byte); + return SkPackARGB32(a, r, g, b); + } + + // kDarken_Mode + static inline int darken_byte(int sc, int dc, int sa, int da) { +- int sd = sc * da; +- int ds = dc * sa; +- if (sd < ds) { +- // srcover +- return sc + dc - SkDiv255Round(ds); +- } else { +- // dstover +- return dc + sc - SkDiv255Round(sd); +- } ++ return SkMin32(sc * da, sa * dc); + } + static SkPMColor darken_modeproc(SkPMColor src, SkPMColor dst) { + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = darken_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = darken_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = darken_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, darken_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, darken_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, darken_byte); + return SkPackARGB32(a, r, g, b); + } + + // kLighten_Mode + static inline int lighten_byte(int sc, int dc, int sa, int da) { +- int sd = sc * da; +- int ds = dc * sa; +- if (sd > ds) { +- // srcover +- return sc + dc - SkDiv255Round(ds); +- } else { +- // dstover +- return dc + sc - SkDiv255Round(sd); +- } ++ return SkMax32(sc * da, sa * dc); + } + static SkPMColor lighten_modeproc(SkPMColor src, SkPMColor dst) { + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = lighten_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = lighten_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = lighten_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, lighten_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, lighten_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, lighten_byte); + return SkPackARGB32(a, r, g, b); + } + + // kColorDodge_Mode + static inline int colordodge_byte(int sc, int dc, int sa, int da) { +- int diff = sa - sc; +- int rc; +- if (0 == diff) { +- rc = sa * da + sc * (255 - da) + dc * (255 - sa); +- rc = SkDiv255Round(rc); +- } else { +- int tmp = (dc * sa << 15) / (da * diff); +- rc = SkDiv255Round(sa * da) * tmp >> 15; +- // don't clamp here, since we'll do it in our modeproc +- } +- return rc; ++ if (dc == 0) ++ return 0; ++ // Avoid division by 0 ++ if (sc == sa) ++ return da * sa; ++ ++ return SkMin32(sa * da, sa * sa * dc / (sa - sc)); + } + static SkPMColor colordodge_modeproc(SkPMColor src, SkPMColor dst) { +- // added to avoid div-by-zero in colordodge_byte +- if (0 == dst) { +- return src; +- } +- + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = colordodge_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = colordodge_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = colordodge_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); +- r = clamp_max(r, a); +- g = clamp_max(g, a); +- b = clamp_max(b, a); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, colordodge_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, colordodge_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, colordodge_byte); + return SkPackARGB32(a, r, g, b); + } + + // kColorBurn_Mode + static inline int colorburn_byte(int sc, int dc, int sa, int da) { +- int rc; +- if (dc == da && 0 == sc) { +- rc = sa * da + dc * (255 - sa); +- } else if (0 == sc) { +- return SkAlphaMulAlpha(dc, 255 - sa); +- } else { +- int tmp = (sa * (da - dc) * 256) / (sc * da); +- if (tmp > 256) { +- tmp = 256; +- } +- int tmp2 = sa * da; +- rc = tmp2 - (tmp2 * tmp >> 8) + sc * (255 - da) + dc * (255 - sa); +- } +- return SkDiv255Round(rc); ++ // Avoid division by 0 ++ if(dc == da) ++ return sa * da; ++ if(sc == 0) ++ return 0; ++ ++ return sa * da - SkMin32(sa * da, sa * sa * (da - dc) / sc); + } + static SkPMColor colorburn_modeproc(SkPMColor src, SkPMColor dst) { +- // added to avoid div-by-zero in colorburn_byte +- if (0 == dst) { +- return src; +- } +- + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = colorburn_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = colorburn_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = colorburn_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); +- return SkPackARGB32(a, r, g, b); +-} +- +-// kHardLight_Mode +-static inline int hardlight_byte(int sc, int dc, int sa, int da) { +- int rc; +- if (2 * sc <= sa) { +- rc = 2 * sc * dc; +- } else { +- rc = sa * da - 2 * (da - dc) * (sa - sc); +- } +- return clamp_div255round(rc + sc * (255 - da) + dc * (255 - sa)); +-} +-static SkPMColor hardlight_modeproc(SkPMColor src, SkPMColor dst) { +- int sa = SkGetPackedA32(src); +- int da = SkGetPackedA32(dst); +- int a = srcover_byte(sa, da); +- int r = hardlight_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = hardlight_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = hardlight_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, colorburn_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, colorburn_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, colorburn_byte); + return SkPackARGB32(a, r, g, b); + } + + // returns 255 * sqrt(n/255) + static U8CPU sqrt_unit_byte(U8CPU n) { + return SkSqrtBits(n, 15+4); + } + + // kSoftLight_Mode + static inline int softlight_byte(int sc, int dc, int sa, int da) { + int m = da ? dc * 256 / da : 0; + int rc; +- if (2 * sc <= sa) { +- rc = dc * (sa + ((2 * sc - sa) * (256 - m) >> 8)); +- } else if (4 * dc <= da) { ++ if (2 * sc <= sa) ++ return dc * (sa + ((2 * sc - sa) * (256 - m) >> 8)); ++ ++ if (4 * dc <= da) { + int tmp = (4 * m * (4 * m + 256) * (m - 256) >> 16) + 7 * m; +- rc = dc * sa + (da * (2 * sc - sa) * tmp >> 8); +- } else { +- int tmp = sqrt_unit_byte(m) - m; +- rc = dc * sa + (da * (2 * sc - sa) * tmp >> 8); ++ return dc * sa + (da * (2 * sc - sa) * tmp >> 8); + } +- return clamp_div255round(rc + sc * (255 - da) + dc * (255 - sa)); ++ int tmp = sqrt_unit_byte(m) - m; ++ return rc = dc * sa + (da * (2 * sc - sa) * tmp >> 8); + } + static SkPMColor softlight_modeproc(SkPMColor src, SkPMColor dst) { + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = softlight_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = softlight_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = softlight_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, softlight_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, softlight_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, softlight_byte); + return SkPackARGB32(a, r, g, b); + } + + // kDifference_Mode + static inline int difference_byte(int sc, int dc, int sa, int da) { +- int tmp = SkMin32(sc * da, dc * sa); +- return clamp_signed_byte(sc + dc - 2 * SkDiv255Round(tmp)); ++ int tmp = dc * sa - sc * da; ++ if(tmp<0) ++ return - tmp; ++ ++ return tmp; + } + static SkPMColor difference_modeproc(SkPMColor src, SkPMColor dst) { + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = difference_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = difference_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = difference_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, difference_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, difference_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, difference_byte); + return SkPackARGB32(a, r, g, b); + } + + // kExclusion_Mode + static inline int exclusion_byte(int sc, int dc, int sa, int da) { +- // this equations is wacky, wait for SVG to confirm it +- int r = sc * da + dc * sa - 2 * sc * dc + sc * (255 - da) + dc * (255 - sa); +- return clamp_div255round(r); ++ return sc * da + dc * sa - 2 * dc * sc; + } + static SkPMColor exclusion_modeproc(SkPMColor src, SkPMColor dst) { + int sa = SkGetPackedA32(src); + int da = SkGetPackedA32(dst); + int a = srcover_byte(sa, da); +- int r = exclusion_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da); +- int g = exclusion_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da); +- int b = exclusion_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da); ++ int r = blendfunc_byte(SkGetPackedR32(src), SkGetPackedR32(dst), sa, da, exclusion_byte); ++ int g = blendfunc_byte(SkGetPackedG32(src), SkGetPackedG32(dst), sa, da, exclusion_byte); ++ int b = blendfunc_byte(SkGetPackedB32(src), SkGetPackedB32(dst), sa, da, exclusion_byte); ++ return SkPackARGB32(a, r, g, b); ++} ++ ++/////////////////////////////////////////////////////////////////////////////////////////////////////////////////// ++struct BlendColor { ++ float r; ++ float g; ++ float b; ++ ++ BlendColor(): r(0), g(0), b(0) ++ {} ++}; ++ ++static inline float Lum(BlendColor C) ++{ ++ return C.r * 0.3 + C.g * 0.59 + C.b* 0.11; ++} ++ ++static inline float SkMinFloat(float a, float b) ++{ ++ if (a > b) ++ a = b; ++ return a; ++} ++ ++static inline float SkMaxFloat(float a, float b) ++{ ++ if (a < b) ++ a = b; ++ return a; ++} ++ ++#define minimum(C) SkMinFloat(SkMinFloat(C.r, C.g), C.b) ++#define maximum(C) SkMaxFloat(SkMaxFloat(C.r, C.g), C.b) ++ ++static inline float Sat(BlendColor c) { ++ return maximum(c) - minimum(c); ++} ++ ++static inline void setSaturationComponents(float& Cmin, float& Cmid, float& Cmax, float s) { ++ if(Cmax > Cmin) { ++ Cmid = (((Cmid - Cmin) * s ) / (Cmax - Cmin)); ++ Cmax = s; ++ } else { ++ Cmax = 0; ++ Cmid = 0; ++ } ++ Cmin = 0; ++} ++ ++static inline BlendColor SetSat(BlendColor C, float s) { ++ if(C.r <= C.g) { ++ if(C.g <= C.b) ++ setSaturationComponents(C.r, C.g, C.b, s); ++ else ++ if(C.r <= C.b) ++ setSaturationComponents(C.r, C.b, C.g, s); ++ else ++ setSaturationComponents(C.b, C.r, C.g, s); ++ } else if(C.r <= C.b) ++ setSaturationComponents(C.g, C.r, C.b, s); ++ else ++ if(C.g <= C.b) ++ setSaturationComponents(C.g, C.b, C.r, s); ++ else ++ setSaturationComponents(C.b, C.g, C.r, s); ++ ++ return C; ++} ++ ++static inline BlendColor clipColor(BlendColor C) { ++ float L = Lum(C); ++ float n = minimum(C); ++ float x = maximum(C); ++ if(n < 0) { ++ C.r = L + (((C.r - L) * L) / (L - n)); ++ C.g = L + (((C.g - L) * L) / (L - n)); ++ C.b = L + (((C.b - L) * L) / (L - n)); ++ } ++ ++ if(x > 1) { ++ C.r = L + (((C.r - L) * (1 - L)) / (x - L)); ++ C.g = L + (((C.g - L) * (1 - L)) / (x - L)); ++ C.b = L + (((C.b - L) * (1 - L)) / (x - L)); ++ } ++ return C; ++} ++ ++static inline BlendColor SetLum(BlendColor C, float l) { ++ float d = l - Lum(C); ++ C.r += d; ++ C.g += d; ++ C.b += d; ++ ++ return clipColor(C); ++} ++ ++#define blendfunc_nonsep_byte(sc, dc, sa, da, blendval) \ ++ clamp_div255round(sc * (255 - da) + dc * (255 - sa) + (int)(sa * da * blendval)) ++ ++static SkPMColor hue_modeproc(SkPMColor src, SkPMColor dst) { ++ int sr = SkGetPackedR32(src); ++ int sg = SkGetPackedG32(src); ++ int sb = SkGetPackedB32(src); ++ int sa = SkGetPackedA32(src); ++ ++ int dr = SkGetPackedR32(dst); ++ int dg = SkGetPackedG32(dst); ++ int db = SkGetPackedB32(dst); ++ int da = SkGetPackedA32(dst); ++ ++ BlendColor Cs; ++ if(sa) { ++ Cs.r = (float)sr / sa; ++ Cs.g = (float)sg / sa; ++ Cs.b = (float)sb / sa; ++ BlendColor Cd; ++ if(da) { ++ Cd.r = (float)dr / da; ++ Cd.g = (float)dg / da; ++ Cd.b = (float)db / da; ++ Cs = SetLum(SetSat(Cs, Sat(Cd)), Lum(Cd)); ++ } ++ } ++ ++ int a = srcover_byte(sa, da); ++ int r = blendfunc_nonsep_byte(sr, dr, sa, da, Cs.r); ++ int g = blendfunc_nonsep_byte(sg, dg, sa, da, Cs.g); ++ int b = blendfunc_nonsep_byte(sb, db, sa, da, Cs.b); ++ return SkPackARGB32(a, r, g, b); ++} ++ ++static SkPMColor saturation_modeproc(SkPMColor src, SkPMColor dst) { ++ int sr = SkGetPackedR32(src); ++ int sg = SkGetPackedG32(src); ++ int sb = SkGetPackedB32(src); ++ int sa = SkGetPackedA32(src); ++ ++ int dr = SkGetPackedR32(dst); ++ int dg = SkGetPackedG32(dst); ++ int db = SkGetPackedB32(dst); ++ int da = SkGetPackedA32(dst); ++ ++ BlendColor Cs; ++ if(sa) { ++ Cs.r = (float)sr / sa; ++ Cs.g = (float)sg / sa; ++ Cs.b = (float)sb / sa; ++ BlendColor Cd; ++ if(da) { ++ Cd.r = (float)dr / da; ++ Cd.g = (float)dg / da; ++ Cd.b = (float)db / da; ++ Cs = SetLum(SetSat(Cd, Sat(Cs)), Lum(Cd)); ++ } ++ } ++ ++ int a = srcover_byte(sa, da); ++ int r = blendfunc_nonsep_byte(sr, dr, sa, da, Cs.r); ++ int g = blendfunc_nonsep_byte(sg, dg, sa, da, Cs.g); ++ int b = blendfunc_nonsep_byte(sb, db, sa, da, Cs.b); ++ return SkPackARGB32(a, r, g, b); ++} ++ ++static SkPMColor color_modeproc(SkPMColor src, SkPMColor dst) { ++ int sr = SkGetPackedR32(src); ++ int sg = SkGetPackedG32(src); ++ int sb = SkGetPackedB32(src); ++ int sa = SkGetPackedA32(src); ++ ++ int dr = SkGetPackedR32(dst); ++ int dg = SkGetPackedG32(dst); ++ int db = SkGetPackedB32(dst); ++ int da = SkGetPackedA32(dst); ++ ++ BlendColor Cs; ++ if(sa) { ++ Cs.r = (float)sr / sa; ++ Cs.g = (float)sg / sa; ++ Cs.b = (float)sb / sa; ++ BlendColor Cd; ++ if(da) { ++ Cd.r = (float)dr / da; ++ Cd.g = (float)dg / da; ++ Cd.b = (float)db / da; ++ Cs = SetLum(Cs, Lum(Cd)); ++ } ++ } ++ ++ int a = srcover_byte(sa, da); ++ int r = blendfunc_nonsep_byte(sr, dr, sa, da, Cs.r); ++ int g = blendfunc_nonsep_byte(sg, dg, sa, da, Cs.g); ++ int b = blendfunc_nonsep_byte(sb, db, sa, da, Cs.b); ++ return SkPackARGB32(a, r, g, b); ++} ++ ++static SkPMColor luminosity_modeproc(SkPMColor src, SkPMColor dst) { ++ int sr = SkGetPackedR32(src); ++ int sg = SkGetPackedG32(src); ++ int sb = SkGetPackedB32(src); ++ int sa = SkGetPackedA32(src); ++ ++ int dr = SkGetPackedR32(dst); ++ int dg = SkGetPackedG32(dst); ++ int db = SkGetPackedB32(dst); ++ int da = SkGetPackedA32(dst); ++ ++ BlendColor Cs; ++ if(sa) { ++ Cs.r = (float)sr / sa; ++ Cs.g = (float)sg / sa; ++ Cs.b = (float)sb / sa; ++ BlendColor Cd; ++ if(da) { ++ Cd.r = (float)dr / da; ++ Cd.g = (float)dg / da; ++ Cd.b = (float)db / da; ++ Cs = SetLum(Cd, Lum(Cs)); ++ } ++ } ++ ++ int a = srcover_byte(sa, da); ++ int r = blendfunc_nonsep_byte(sr, dr, sa, da, Cs.r); ++ int g = blendfunc_nonsep_byte(sg, dg, sa, da, Cs.g); ++ int b = blendfunc_nonsep_byte(sb, db, sa, da, Cs.b); + return SkPackARGB32(a, r, g, b); + } + + struct ProcCoeff { + SkXfermodeProc fProc; + SkXfermode::Coeff fSC; + SkXfermode::Coeff fDC; + }; +@@ -430,27 +627,31 @@ static const ProcCoeff gProcCoeffs[] = { + { dstin_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kSA_Coeff }, + { srcout_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kZero_Coeff }, + { dstout_modeproc, SkXfermode::kZero_Coeff, SkXfermode::kISA_Coeff }, + { srcatop_modeproc, SkXfermode::kDA_Coeff, SkXfermode::kISA_Coeff }, + { dstatop_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kSA_Coeff }, + { xor_modeproc, SkXfermode::kIDA_Coeff, SkXfermode::kISA_Coeff }, + + { plus_modeproc, SkXfermode::kOne_Coeff, SkXfermode::kOne_Coeff }, +- { multiply_modeproc,SkXfermode::kZero_Coeff, SkXfermode::kSC_Coeff }, ++ { multiply_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF}, + { screen_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { overlay_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { darken_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { lighten_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { colordodge_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { colorburn_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { hardlight_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { softlight_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { difference_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + { exclusion_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, ++ { hue_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, ++ { saturation_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, ++ { color_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, ++ { luminosity_modeproc, CANNOT_USE_COEFF, CANNOT_USE_COEFF }, + }; + + /////////////////////////////////////////////////////////////////////////////// + + bool SkXfermode::asCoeff(Coeff* src, Coeff* dst) { + return false; + } + +@@ -1172,16 +1373,20 @@ static const Proc16Rec gModeProcs16[] = + { darken_modeproc16_0, darken_modeproc16_255, NULL }, // darken + { lighten_modeproc16_0, lighten_modeproc16_255, NULL }, // lighten + { NULL, NULL, NULL }, // colordodge + { NULL, NULL, NULL }, // colorburn + { NULL, NULL, NULL }, // hardlight + { NULL, NULL, NULL }, // softlight + { NULL, NULL, NULL }, // difference + { NULL, NULL, NULL }, // exclusion ++ { NULL, NULL, NULL }, // hue ++ { NULL, NULL, NULL }, // saturation ++ { NULL, NULL, NULL }, // color ++ { NULL, NULL, NULL }, // luminosity + }; + + SkXfermodeProc16 SkXfermode::GetProc16(Mode mode, SkColor srcColor) { + SkXfermodeProc16 proc16 = NULL; + if ((unsigned)mode < kModeCount) { + const Proc16Rec& rec = gModeProcs16[mode]; + unsigned a = SkColorGetA(srcColor); + diff --git a/gfx/skia/patches/archive/0010-Bug-848491-Re-apply-bug-817356-Patch-Skia-to-recogni.patch b/gfx/skia/patches/archive/0010-Bug-848491-Re-apply-bug-817356-Patch-Skia-to-recogni.patch new file mode 100644 index 0000000000..0d44b008d6 --- /dev/null +++ b/gfx/skia/patches/archive/0010-Bug-848491-Re-apply-bug-817356-Patch-Skia-to-recogni.patch @@ -0,0 +1,22 @@ +From: George Wright +Date: Thu, 25 Apr 2013 20:55:02 -0400 +Subject: Bug 848491 - Re-apply bug 817356 - Patch Skia to recognize uppercase PPC/PPC64. + + +diff --git a/gfx/skia/include/core/SkPreConfig.h b/gfx/skia/include/core/SkPreConfig.h +index 11cb223..7e95b99 100644 +--- a/gfx/skia/include/core/SkPreConfig.h ++++ b/gfx/skia/include/core/SkPreConfig.h +@@ -99,7 +99,8 @@ + ////////////////////////////////////////////////////////////////////// + + #if !defined(SK_CPU_BENDIAN) && !defined(SK_CPU_LENDIAN) +- #if defined (__ppc__) || defined(__ppc64__) ++ #if defined (__ppc__) || defined(__PPC__) || defined(__ppc64__) \ ++ || defined(__PPC64__) + #define SK_CPU_BENDIAN + #else + #define SK_CPU_LENDIAN +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0011-Bug-719575-Fix-clang-build.patch b/gfx/skia/patches/archive/0011-Bug-719575-Fix-clang-build.patch new file mode 100644 index 0000000000..95cb08a36f --- /dev/null +++ b/gfx/skia/patches/archive/0011-Bug-719575-Fix-clang-build.patch @@ -0,0 +1,28 @@ +From cf855f31194ff071f2c787a7413d70a43f15f204 Mon Sep 17 00:00:00 2001 +From: Ehsan Akhgari +Date: Tue, 29 May 2012 15:39:55 -0400 +Subject: [PATCH] Bug 755869 - Re-apply patch from bug 719575 to fix clang + builds for the new Skia r=gw280 + +--- + gfx/skia/src/ports/SkFontHost_mac_coretext.cpp | 4 ++-- + 1 files changed, 2 insertions(+), 2 deletions(-) + +diff --git a/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp b/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp +index c43d1a6..ce5f409 100644 +--- a/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp ++++ b/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp +@@ -807,8 +807,8 @@ CGRGBPixel* Offscreen::getCG(const SkScalerContext_Mac& context, const SkGlyph& + void SkScalerContext_Mac::getVerticalOffset(CGGlyph glyphID, SkIPoint* offset) const { + CGSize vertOffset; + CTFontGetVerticalTranslationsForGlyphs(fCTVerticalFont, &glyphID, &vertOffset, 1); +- const SkPoint trans = {SkFloatToScalar(vertOffset.width), +- SkFloatToScalar(vertOffset.height)}; ++ const SkPoint trans = {SkScalar(SkFloatToScalar(vertOffset.width)), ++ SkScalar(SkFloatToScalar(vertOffset.height))}; + SkPoint floatOffset; + fVerticalMatrix.mapPoints(&floatOffset, &trans, 1); + if (!isSnowLeopard()) { +-- +1.7.5.4 + diff --git a/gfx/skia/patches/archive/0011-Bug-839347-no-anon-namespace-around-SkNO_RETURN_HINT.patch b/gfx/skia/patches/archive/0011-Bug-839347-no-anon-namespace-around-SkNO_RETURN_HINT.patch new file mode 100644 index 0000000000..854f0b1afe --- /dev/null +++ b/gfx/skia/patches/archive/0011-Bug-839347-no-anon-namespace-around-SkNO_RETURN_HINT.patch @@ -0,0 +1,31 @@ +# HG changeset patch +# Parent 2c6da9f02606f7a02f635d99ef8cf669d3bc5c4b +# User Daniel Holbert +Bug 839347: Move SkNO_RETURN_HINT out of anonymous namespace so that clang won't warn about it being unused. r=mattwoodrow + +diff --git a/gfx/skia/include/core/SkPostConfig.h b/gfx/skia/include/core/SkPostConfig.h +--- a/gfx/skia/include/core/SkPostConfig.h ++++ b/gfx/skia/include/core/SkPostConfig.h +@@ -63,20 +63,18 @@ + * The clang static analyzer likes to know that when the program is not + * expected to continue (crash, assertion failure, etc). It will notice that + * some combination of parameters lead to a function call that does not return. + * It can then make appropriate assumptions about the parameters in code + * executed only if the non-returning function was *not* called. + */ + #if !defined(SkNO_RETURN_HINT) + #if SK_HAS_COMPILER_FEATURE(attribute_analyzer_noreturn) +- namespace { +- inline void SkNO_RETURN_HINT() __attribute__((analyzer_noreturn)); +- inline void SkNO_RETURN_HINT() {} +- } ++ inline void SkNO_RETURN_HINT() __attribute__((analyzer_noreturn)); ++ inline void SkNO_RETURN_HINT() {} + #else + #define SkNO_RETURN_HINT() do {} while (false) + #endif + #endif + + #if defined(SK_ZLIB_INCLUDE) && defined(SK_SYSTEM_ZLIB) + #error "cannot define both SK_ZLIB_INCLUDE and SK_SYSTEM_ZLIB" + #elif defined(SK_ZLIB_INCLUDE) || defined(SK_SYSTEM_ZLIB) diff --git a/gfx/skia/patches/archive/0012-Bug-751418-Add-our-own-GrUserConfig-r-mattwoodrow.patch b/gfx/skia/patches/archive/0012-Bug-751418-Add-our-own-GrUserConfig-r-mattwoodrow.patch new file mode 100644 index 0000000000..cde2940950 --- /dev/null +++ b/gfx/skia/patches/archive/0012-Bug-751418-Add-our-own-GrUserConfig-r-mattwoodrow.patch @@ -0,0 +1,29 @@ +From 4c25387e6e6cdb55f19e51631a78c3fa9b4a3c73 Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Thu, 1 Nov 2012 17:29:50 -0400 +Subject: [PATCH 2/8] Bug 751418 - Add our own GrUserConfig r=mattwoodrow + +--- + gfx/skia/include/gpu/GrUserConfig.h | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/gfx/skia/include/gpu/GrUserConfig.h b/gfx/skia/include/gpu/GrUserConfig.h +index d514486..b729ab3 100644 +--- a/gfx/skia/include/gpu/GrUserConfig.h ++++ b/gfx/skia/include/gpu/GrUserConfig.h +@@ -64,6 +64,12 @@ + #define GR_TEXT_SCALAR_IS_FIXED 0 + #define GR_TEXT_SCALAR_IS_FLOAT 1 + ++/* ++ * This allows us to set a callback to be called before each GL call to ensure ++ * that our context is set correctly ++ */ ++#define GR_GL_PER_GL_FUNC_CALLBACK 1 ++ + #endif + + +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0012-Bug-759683-make-ssse3-conditional.patch b/gfx/skia/patches/archive/0012-Bug-759683-make-ssse3-conditional.patch new file mode 100644 index 0000000000..dc780c5ec6 --- /dev/null +++ b/gfx/skia/patches/archive/0012-Bug-759683-make-ssse3-conditional.patch @@ -0,0 +1,22 @@ +diff --git a/gfx/skia/src/opts/opts_check_SSE2.cpp b/gfx/skia/src/opts/opts_check_SSE2.cpp +--- a/gfx/skia/src/opts/opts_check_SSE2.cpp ++++ b/gfx/skia/src/opts/opts_check_SSE2.cpp +@@ -91,17 +91,17 @@ static bool cachedHasSSE2() { + + static bool cachedHasSSSE3() { + static bool gHasSSSE3 = hasSSSE3(); + return gHasSSSE3; + } + + void SkBitmapProcState::platformProcs() { + if (cachedHasSSSE3()) { +-#if !defined(SK_BUILD_FOR_ANDROID) ++#if defined(SK_BUILD_SSSE3) + // Disable SSSE3 optimization for Android x86 + if (fSampleProc32 == S32_opaque_D32_filter_DX) { + fSampleProc32 = S32_opaque_D32_filter_DX_SSSE3; + } else if (fSampleProc32 == S32_alpha_D32_filter_DX) { + fSampleProc32 = S32_alpha_D32_filter_DX_SSSE3; + } + + if (fSampleProc32 == S32_opaque_D32_filter_DXDY) { diff --git a/gfx/skia/patches/archive/0013-Bug-751418-Fix-compile-error-on-gcc-in-Skia-GL-r-mat.patch b/gfx/skia/patches/archive/0013-Bug-751418-Fix-compile-error-on-gcc-in-Skia-GL-r-mat.patch new file mode 100644 index 0000000000..167e22184d --- /dev/null +++ b/gfx/skia/patches/archive/0013-Bug-751418-Fix-compile-error-on-gcc-in-Skia-GL-r-mat.patch @@ -0,0 +1,26 @@ +From 3d786b1f0c040205ad9ef6d4216ce06b41f7359f Mon Sep 17 00:00:00 2001 +From: George Wright +Date: Mon, 5 Nov 2012 15:49:42 +0000 +Subject: [PATCH 3/8] Bug 751418 - Fix compile error on gcc in Skia/GL + r=mattwoodrow + +--- + gfx/skia/src/gpu/gl/GrGLProgram.cpp | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/gfx/skia/src/gpu/gl/GrGLProgram.cpp b/gfx/skia/src/gpu/gl/GrGLProgram.cpp +index 2703110..40cadc3 100644 +--- a/gfx/skia/src/gpu/gl/GrGLProgram.cpp ++++ b/gfx/skia/src/gpu/gl/GrGLProgram.cpp +@@ -575,7 +575,7 @@ bool GrGLProgram::genProgram(const GrCustomStage** customStages) { + POS_ATTR_NAME); + + builder.fVSCode.appendf("void main() {\n" +- "\tvec3 pos3 = %s * vec3("POS_ATTR_NAME", 1);\n" ++ "\tvec3 pos3 = %s * vec3(" POS_ATTR_NAME ", 1);\n" + "\tgl_Position = vec4(pos3.xy, 0, pos3.z);\n", + viewMName); + +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0013-Bug-761890-fonts.patch b/gfx/skia/patches/archive/0013-Bug-761890-fonts.patch new file mode 100644 index 0000000000..f20293d4cc --- /dev/null +++ b/gfx/skia/patches/archive/0013-Bug-761890-fonts.patch @@ -0,0 +1,162 @@ +# HG changeset patch +# User Nicholas Cameron +# Date 1337146927 -43200 +# Node ID 310209abef2c2667e5de41dd2a1f071e8cd42821 +# Parent 93f3ca4d5707b2aae9c6ae52d5d29c2c802e7ef8 +Bug 746883; changes to the Skia library. r=gw280 + +diff --git a/gfx/skia/include/core/SkDraw.h b/gfx/skia/include/core/SkDraw.h +--- a/gfx/skia/include/core/SkDraw.h ++++ b/gfx/skia/include/core/SkDraw.h +@@ -125,23 +125,24 @@ public: + #endif + }; + + class SkGlyphCache; + + class SkTextToPathIter { + public: + SkTextToPathIter(const char text[], size_t length, const SkPaint& paint, +- bool applyStrokeAndPathEffects); ++ bool applyStrokeAndPathEffects, bool useCanonicalTextSize = true); + ~SkTextToPathIter(); + + const SkPaint& getPaint() const { return fPaint; } + SkScalar getPathScale() const { return fScale; } + + const SkPath* next(SkScalar* xpos); //!< returns nil when there are no more paths ++ bool nextWithWhitespace(const SkPath** path, SkScalar* xpos); //!< returns false when there are no more paths + + private: + SkGlyphCache* fCache; + SkPaint fPaint; + SkScalar fScale; + SkFixed fPrevAdvance; + const char* fText; + const char* fStop; +diff --git a/gfx/skia/src/core/SkPaint.cpp b/gfx/skia/src/core/SkPaint.cpp +--- a/gfx/skia/src/core/SkPaint.cpp ++++ b/gfx/skia/src/core/SkPaint.cpp +@@ -1359,30 +1359,32 @@ void SkPaint::getPosTextPath(const void* + const SkPoint pos[], SkPath* path) const { + SkASSERT(length == 0 || textData != NULL); + + const char* text = (const char*)textData; + if (text == NULL || length == 0 || path == NULL) { + return; + } + +- SkTextToPathIter iter(text, length, *this, false); ++ SkTextToPathIter iter(text, length, *this, false, false); + SkMatrix matrix; + SkPoint prevPos; + prevPos.set(0, 0); + + matrix.setScale(iter.getPathScale(), iter.getPathScale()); + path->reset(); + + unsigned int i = 0; + const SkPath* iterPath; +- while ((iterPath = iter.next(NULL)) != NULL) { +- matrix.postTranslate(pos[i].fX - prevPos.fX, pos[i].fY - prevPos.fY); +- path->addPath(*iterPath, matrix); +- prevPos = pos[i]; ++ while (iter.nextWithWhitespace(&iterPath, NULL)) { ++ if (iterPath) { ++ matrix.postTranslate(pos[i].fX - prevPos.fX, pos[i].fY - prevPos.fY); ++ path->addPath(*iterPath, matrix); ++ prevPos = pos[i]; ++ } + i++; + } + } + + static void add_flattenable(SkDescriptor* desc, uint32_t tag, + SkFlattenableWriteBuffer* buffer) { + buffer->flatten(desc->addEntry(tag, buffer->size(), NULL)); + } +@@ -2118,30 +2120,31 @@ const SkRect& SkPaint::doComputeFastBoun + + static bool has_thick_frame(const SkPaint& paint) { + return paint.getStrokeWidth() > 0 && + paint.getStyle() != SkPaint::kFill_Style; + } + + SkTextToPathIter::SkTextToPathIter( const char text[], size_t length, + const SkPaint& paint, +- bool applyStrokeAndPathEffects) ++ bool applyStrokeAndPathEffects, ++ bool useCanonicalTextSize) + : fPaint(paint) { + fGlyphCacheProc = paint.getMeasureCacheProc(SkPaint::kForward_TextBufferDirection, + true); + + fPaint.setLinearText(true); + fPaint.setMaskFilter(NULL); // don't want this affecting our path-cache lookup + + if (fPaint.getPathEffect() == NULL && !has_thick_frame(fPaint)) { + applyStrokeAndPathEffects = false; + } + + // can't use our canonical size if we need to apply patheffects +- if (fPaint.getPathEffect() == NULL) { ++ if (useCanonicalTextSize && fPaint.getPathEffect() == NULL) { + fPaint.setTextSize(SkIntToScalar(SkPaint::kCanonicalTextSizeForPaths)); + fScale = paint.getTextSize() / SkPaint::kCanonicalTextSizeForPaths; + if (has_thick_frame(fPaint)) { + fPaint.setStrokeWidth(SkScalarDiv(fPaint.getStrokeWidth(), fScale)); + } + } else { + fScale = SK_Scalar1; + } +@@ -2185,30 +2188,47 @@ SkTextToPathIter::SkTextToPathIter( cons + fXYIndex = paint.isVerticalText() ? 1 : 0; + } + + SkTextToPathIter::~SkTextToPathIter() { + SkGlyphCache::AttachCache(fCache); + } + + const SkPath* SkTextToPathIter::next(SkScalar* xpos) { +- while (fText < fStop) { ++ const SkPath* result; ++ while (nextWithWhitespace(&result, xpos)) { ++ if (result) { ++ if (xpos) { ++ *xpos = fXPos; ++ } ++ return result; ++ } ++ } ++ return NULL; ++} ++ ++bool SkTextToPathIter::nextWithWhitespace(const SkPath** path, SkScalar* xpos) { ++ if (fText < fStop) { + const SkGlyph& glyph = fGlyphCacheProc(fCache, &fText); + + fXPos += SkScalarMul(SkFixedToScalar(fPrevAdvance + fAutoKern.adjust(glyph)), fScale); + fPrevAdvance = advance(glyph, fXYIndex); // + fPaint.getTextTracking(); + + if (glyph.fWidth) { + if (xpos) { + *xpos = fXPos; + } +- return fCache->findPath(glyph); ++ *path = fCache->findPath(glyph); ++ return true; ++ } else { ++ *path = NULL; ++ return true; + } + } +- return NULL; ++ return false; + } + + /////////////////////////////////////////////////////////////////////////////// + + bool SkPaint::nothingToDraw() const { + if (fLooper) { + return false; + } diff --git a/gfx/skia/patches/archive/0014-Bug-765038-Fix-clang-build.patch b/gfx/skia/patches/archive/0014-Bug-765038-Fix-clang-build.patch new file mode 100644 index 0000000000..6cc74914d2 --- /dev/null +++ b/gfx/skia/patches/archive/0014-Bug-765038-Fix-clang-build.patch @@ -0,0 +1,29 @@ +# HG changeset patch +# Parent 9ded7a9f94a863dfa1f3227d3013367f51b8b522 +# User Nicholas Cameron +Bug 765038; fix a Clang compilation bug in Skia; r=jwatt + +diff --git a/gfx/skia/src/sfnt/SkOTTable_head.h b/gfx/skia/src/sfnt/SkOTTable_head.h +--- a/gfx/skia/src/sfnt/SkOTTable_head.h ++++ b/gfx/skia/src/sfnt/SkOTTable_head.h +@@ -109,18 +109,18 @@ struct SkOTTableHead { + } raw; + } macStyle; + SK_OT_USHORT lowestRecPPEM; + struct FontDirectionHint { + SK_TYPED_ENUM(Value, SK_OT_SHORT, + ((FullyMixedDirectionalGlyphs, SkTEndian_SwapBE16(0))) + ((OnlyStronglyLTR, SkTEndian_SwapBE16(1))) + ((StronglyLTR, SkTEndian_SwapBE16(2))) +- ((OnlyStronglyRTL, static_cast(SkTEndian_SwapBE16(-1)))) +- ((StronglyRTL, static_cast(SkTEndian_SwapBE16(-2)))) ++ ((OnlyStronglyRTL, static_cast(SkTEndian_SwapBE16(static_cast(-1))))) ++ ((StronglyRTL, static_cast(SkTEndian_SwapBE16(static_cast(-2))))) + SK_SEQ_END, + (value)SK_SEQ_END) + } fontDirectionHint; + struct IndexToLocFormat { + SK_TYPED_ENUM(Value, SK_OT_SHORT, + ((ShortOffsets, SkTEndian_SwapBE16(0))) + ((LongOffsets, SkTEndian_SwapBE16(1))) + SK_SEQ_END, diff --git a/gfx/skia/patches/archive/0015-Bug-766017-warnings.patch b/gfx/skia/patches/archive/0015-Bug-766017-warnings.patch new file mode 100644 index 0000000000..174dcb9bce --- /dev/null +++ b/gfx/skia/patches/archive/0015-Bug-766017-warnings.patch @@ -0,0 +1,865 @@ +From: David Zbarsky +Bug 766017 - Fix some skia warnings r=gw280 + +diff --git a/gfx/skia/include/utils/mac/SkCGUtils.h b/gfx/skia/include/utils/mac/SkCGUtils.h +--- a/gfx/skia/include/utils/mac/SkCGUtils.h ++++ b/gfx/skia/include/utils/mac/SkCGUtils.h +@@ -39,18 +39,16 @@ static inline CGImageRef SkCreateCGImage + /** + * Draw the bitmap into the specified CG context. The bitmap will be converted + * to a CGImage using the generic RGB colorspace. (x,y) specifies the position + * of the top-left corner of the bitmap. The bitmap is converted using the + * colorspace returned by CGColorSpaceCreateDeviceRGB() + */ + void SkCGDrawBitmap(CGContextRef, const SkBitmap&, float x, float y); + +-bool SkPDFDocumentToBitmap(SkStream* stream, SkBitmap* output); +- + /** + * Return a provider that wraps the specified stream. It will become an + * owner of the stream, so the caller must still manage its ownership. + * + * To hand-off ownership of the stream to the provider, the caller must do + * something like the following: + * + * SkStream* stream = new ...; +diff --git a/gfx/skia/src/core/SkAAClip.cpp b/gfx/skia/src/core/SkAAClip.cpp +--- a/gfx/skia/src/core/SkAAClip.cpp ++++ b/gfx/skia/src/core/SkAAClip.cpp +@@ -246,17 +246,17 @@ static void count_left_right_zeros(const + zeros = 0; + } + row += 2; + width -= n; + } + *riteZ = zeros; + } + +-#ifdef SK_DEBUG ++#if 0 + static void test_count_left_right_zeros() { + static bool gOnce; + if (gOnce) { + return; + } + gOnce = true; + + const uint8_t data0[] = { 0, 0, 10, 0xFF }; +@@ -1319,22 +1319,16 @@ bool SkAAClip::setPath(const SkPath& pat + } + + /////////////////////////////////////////////////////////////////////////////// + + typedef void (*RowProc)(SkAAClip::Builder&, int bottom, + const uint8_t* rowA, const SkIRect& rectA, + const uint8_t* rowB, const SkIRect& rectB); + +-static void sectRowProc(SkAAClip::Builder& builder, int bottom, +- const uint8_t* rowA, const SkIRect& rectA, +- const uint8_t* rowB, const SkIRect& rectB) { +- +-} +- + typedef U8CPU (*AlphaProc)(U8CPU alphaA, U8CPU alphaB); + + static U8CPU sectAlphaProc(U8CPU alphaA, U8CPU alphaB) { + // Multiply + return SkMulDiv255Round(alphaA, alphaB); + } + + static U8CPU unionAlphaProc(U8CPU alphaA, U8CPU alphaB) { +@@ -1429,31 +1423,16 @@ private: + static void adjust_row(RowIter& iter, int& leftA, int& riteA, int rite) { + if (rite == riteA) { + iter.next(); + leftA = iter.left(); + riteA = iter.right(); + } + } + +-static bool intersect(int& min, int& max, int boundsMin, int boundsMax) { +- SkASSERT(min < max); +- SkASSERT(boundsMin < boundsMax); +- if (min >= boundsMax || max <= boundsMin) { +- return false; +- } +- if (min < boundsMin) { +- min = boundsMin; +- } +- if (max > boundsMax) { +- max = boundsMax; +- } +- return true; +-} +- + static void operatorX(SkAAClip::Builder& builder, int lastY, + RowIter& iterA, RowIter& iterB, + AlphaProc proc, const SkIRect& bounds) { + int leftA = iterA.left(); + int riteA = iterA.right(); + int leftB = iterB.left(); + int riteB = iterB.right(); + +@@ -1970,34 +1949,33 @@ static void small_bzero(void* dst, size_ + static inline uint8_t mergeOne(uint8_t value, unsigned alpha) { + return SkMulDiv255Round(value, alpha); + } + static inline uint16_t mergeOne(uint16_t value, unsigned alpha) { + unsigned r = SkGetPackedR16(value); + unsigned g = SkGetPackedG16(value); + unsigned b = SkGetPackedB16(value); + return SkPackRGB16(SkMulDiv255Round(r, alpha), +- SkMulDiv255Round(r, alpha), +- SkMulDiv255Round(r, alpha)); ++ SkMulDiv255Round(g, alpha), ++ SkMulDiv255Round(b, alpha)); + } + static inline SkPMColor mergeOne(SkPMColor value, unsigned alpha) { + unsigned a = SkGetPackedA32(value); + unsigned r = SkGetPackedR32(value); + unsigned g = SkGetPackedG32(value); + unsigned b = SkGetPackedB32(value); + return SkPackARGB32(SkMulDiv255Round(a, alpha), + SkMulDiv255Round(r, alpha), + SkMulDiv255Round(g, alpha), + SkMulDiv255Round(b, alpha)); + } + + template void mergeT(const T* SK_RESTRICT src, int srcN, + const uint8_t* SK_RESTRICT row, int rowN, + T* SK_RESTRICT dst) { +- SkDEBUGCODE(int accumulated = 0;) + for (;;) { + SkASSERT(rowN > 0); + SkASSERT(srcN > 0); + + int n = SkMin32(rowN, srcN); + unsigned rowA = row[1]; + if (0xFF == rowA) { + small_memcpy(dst, src, n * sizeof(T)); +diff --git a/gfx/skia/src/core/SkBlitMask_D32.cpp b/gfx/skia/src/core/SkBlitMask_D32.cpp +--- a/gfx/skia/src/core/SkBlitMask_D32.cpp ++++ b/gfx/skia/src/core/SkBlitMask_D32.cpp +@@ -268,107 +268,49 @@ bool SkBlitMask::BlitColor(const SkBitma + return true; + } + return false; + } + + /////////////////////////////////////////////////////////////////////////////// + /////////////////////////////////////////////////////////////////////////////// + +-static void BW_RowProc_Blend(SkPMColor* SK_RESTRICT dst, +- const uint8_t* SK_RESTRICT mask, +- const SkPMColor* SK_RESTRICT src, int count) { +- int i, octuple = (count + 7) >> 3; +- for (i = 0; i < octuple; ++i) { +- int m = *mask++; +- if (m & 0x80) { dst[0] = SkPMSrcOver(src[0], dst[0]); } +- if (m & 0x40) { dst[1] = SkPMSrcOver(src[1], dst[1]); } +- if (m & 0x20) { dst[2] = SkPMSrcOver(src[2], dst[2]); } +- if (m & 0x10) { dst[3] = SkPMSrcOver(src[3], dst[3]); } +- if (m & 0x08) { dst[4] = SkPMSrcOver(src[4], dst[4]); } +- if (m & 0x04) { dst[5] = SkPMSrcOver(src[5], dst[5]); } +- if (m & 0x02) { dst[6] = SkPMSrcOver(src[6], dst[6]); } +- if (m & 0x01) { dst[7] = SkPMSrcOver(src[7], dst[7]); } +- src += 8; +- dst += 8; +- } +- count &= 7; +- if (count > 0) { +- int m = *mask; +- do { +- if (m & 0x80) { dst[0] = SkPMSrcOver(src[0], dst[0]); } +- m <<= 1; +- src += 1; +- dst += 1; +- } while (--count > 0); +- } +-} +- +-static void BW_RowProc_Opaque(SkPMColor* SK_RESTRICT dst, +- const uint8_t* SK_RESTRICT mask, +- const SkPMColor* SK_RESTRICT src, int count) { +- int i, octuple = (count + 7) >> 3; +- for (i = 0; i < octuple; ++i) { +- int m = *mask++; +- if (m & 0x80) { dst[0] = src[0]; } +- if (m & 0x40) { dst[1] = src[1]; } +- if (m & 0x20) { dst[2] = src[2]; } +- if (m & 0x10) { dst[3] = src[3]; } +- if (m & 0x08) { dst[4] = src[4]; } +- if (m & 0x04) { dst[5] = src[5]; } +- if (m & 0x02) { dst[6] = src[6]; } +- if (m & 0x01) { dst[7] = src[7]; } +- src += 8; +- dst += 8; +- } +- count &= 7; +- if (count > 0) { +- int m = *mask; +- do { +- if (m & 0x80) { dst[0] = SkPMSrcOver(src[0], dst[0]); } +- m <<= 1; +- src += 1; +- dst += 1; +- } while (--count > 0); +- } +-} +- + static void A8_RowProc_Blend(SkPMColor* SK_RESTRICT dst, + const uint8_t* SK_RESTRICT mask, + const SkPMColor* SK_RESTRICT src, int count) { + for (int i = 0; i < count; ++i) { + if (mask[i]) { + dst[i] = SkBlendARGB32(src[i], dst[i], mask[i]); + } + } + } + + // expand the steps that SkAlphaMulQ performs, but this way we can +-// exand.. add.. combine ++// expand.. add.. combine + // instead of + // expand..combine add expand..combine + // + #define EXPAND0(v, m, s) ((v) & (m)) * (s) + #define EXPAND1(v, m, s) (((v) >> 8) & (m)) * (s) + #define COMBINE(e0, e1, m) ((((e0) >> 8) & (m)) | ((e1) & ~(m))) + + static void A8_RowProc_Opaque(SkPMColor* SK_RESTRICT dst, + const uint8_t* SK_RESTRICT mask, + const SkPMColor* SK_RESTRICT src, int count) { +- const uint32_t rbmask = gMask_00FF00FF; + for (int i = 0; i < count; ++i) { + int m = mask[i]; + if (m) { + m += (m >> 7); + #if 1 + // this is slightly slower than the expand/combine version, but it + // is much closer to the old results, so we use it for now to reduce + // rebaselining. + dst[i] = SkAlphaMulQ(src[i], m) + SkAlphaMulQ(dst[i], 256 - m); + #else ++ const uint32_t rbmask = gMask_00FF00FF; + uint32_t v = src[i]; + uint32_t s0 = EXPAND0(v, rbmask, m); + uint32_t s1 = EXPAND1(v, rbmask, m); + v = dst[i]; + uint32_t d0 = EXPAND0(v, rbmask, m); + uint32_t d1 = EXPAND1(v, rbmask, m); + dst[i] = COMBINE(s0 + d0, s1 + d1, rbmask); + #endif +@@ -559,17 +501,17 @@ SkBlitMask::RowProc SkBlitMask::RowFacto + // make this opt-in until chrome can rebaseline + RowProc proc = PlatformRowProcs(config, format, flags); + if (proc) { + return proc; + } + + static const RowProc gProcs[] = { + // need X coordinate to handle BW +- NULL, NULL, //(RowProc)BW_RowProc_Blend, (RowProc)BW_RowProc_Opaque, ++ NULL, NULL, + (RowProc)A8_RowProc_Blend, (RowProc)A8_RowProc_Opaque, + (RowProc)LCD16_RowProc_Blend, (RowProc)LCD16_RowProc_Opaque, + (RowProc)LCD32_RowProc_Blend, (RowProc)LCD32_RowProc_Opaque, + }; + + int index; + switch (config) { + case SkBitmap::kARGB_8888_Config: +diff --git a/gfx/skia/src/core/SkConcaveToTriangles.cpp b/gfx/skia/src/core/SkConcaveToTriangles.cpp +--- a/gfx/skia/src/core/SkConcaveToTriangles.cpp ++++ b/gfx/skia/src/core/SkConcaveToTriangles.cpp +@@ -37,17 +37,16 @@ + #include "SkTDArray.h" + #include "SkGeometry.h" + #include "SkTSort.h" + + // This is used to prevent runaway code bugs, and can probably be removed after + // the code has been proven robust. + #define kMaxCount 1000 + +-#define DEBUG + #ifdef DEBUG + //------------------------------------------------------------------------------ + // Debugging support + //------------------------------------------------------------------------------ + + #include + #include + +diff --git a/gfx/skia/src/core/SkPath.cpp b/gfx/skia/src/core/SkPath.cpp +--- a/gfx/skia/src/core/SkPath.cpp ++++ b/gfx/skia/src/core/SkPath.cpp +@@ -469,17 +469,16 @@ void SkPath::incReserve(U16CPU inc) { + fPts.setReserve(fPts.count() + inc); + + SkDEBUGCODE(this->validate();) + } + + void SkPath::moveTo(SkScalar x, SkScalar y) { + SkDEBUGCODE(this->validate();) + +- int vc = fVerbs.count(); + SkPoint* pt; + + // remember our index + fLastMoveToIndex = fPts.count(); + + pt = fPts.append(); + *fVerbs.append() = kMove_Verb; + pt->set(x, y); +@@ -1163,17 +1162,16 @@ void SkPath::reversePathTo(const SkPath& + } + pts -= gPtsInVerb[verbs[i]]; + } + } + + void SkPath::reverseAddPath(const SkPath& src) { + this->incReserve(src.fPts.count()); + +- const SkPoint* startPts = src.fPts.begin(); + const SkPoint* pts = src.fPts.end(); + const uint8_t* startVerbs = src.fVerbs.begin(); + const uint8_t* verbs = src.fVerbs.end(); + + fIsOval = false; + + bool needMove = true; + bool needClose = false; +diff --git a/gfx/skia/src/core/SkRegion.cpp b/gfx/skia/src/core/SkRegion.cpp +--- a/gfx/skia/src/core/SkRegion.cpp ++++ b/gfx/skia/src/core/SkRegion.cpp +@@ -920,20 +920,16 @@ static int operate(const SkRegion::RunTy + /* Given count RunTypes in a complex region, return the worst case number of + logical intervals that represents (i.e. number of rects that would be + returned from the iterator). + + We could just return count/2, since there must be at least 2 values per + interval, but we can first trim off the const overhead of the initial TOP + value, plus the final BOTTOM + 2 sentinels. + */ +-static int count_to_intervals(int count) { +- SkASSERT(count >= 6); // a single rect is 6 values +- return (count - 4) >> 1; +-} + + /* Given a number of intervals, what is the worst case representation of that + many intervals? + + Worst case (from a storage perspective), is a vertical stack of single + intervals: TOP + N * (BOTTOM INTERVALCOUNT LEFT RIGHT SENTINEL) + SENTINEL + */ + static int intervals_to_count(int intervals) { +diff --git a/gfx/skia/src/core/SkScalerContext.cpp b/gfx/skia/src/core/SkScalerContext.cpp +--- a/gfx/skia/src/core/SkScalerContext.cpp ++++ b/gfx/skia/src/core/SkScalerContext.cpp +@@ -336,44 +336,16 @@ SK_ERROR: + glyph->fTop = 0; + glyph->fWidth = 0; + glyph->fHeight = 0; + // put a valid value here, in case it was earlier set to + // MASK_FORMAT_JUST_ADVANCE + glyph->fMaskFormat = fRec.fMaskFormat; + } + +-static bool isLCD(const SkScalerContext::Rec& rec) { +- return SkMask::kLCD16_Format == rec.fMaskFormat || +- SkMask::kLCD32_Format == rec.fMaskFormat; +-} +- +-static uint16_t a8_to_rgb565(unsigned a8) { +- return SkPackRGB16(a8 >> 3, a8 >> 2, a8 >> 3); +-} +- +-static void copyToLCD16(const SkBitmap& src, const SkMask& dst) { +- SkASSERT(SkBitmap::kA8_Config == src.config()); +- SkASSERT(SkMask::kLCD16_Format == dst.fFormat); +- +- const int width = dst.fBounds.width(); +- const int height = dst.fBounds.height(); +- const uint8_t* srcP = src.getAddr8(0, 0); +- size_t srcRB = src.rowBytes(); +- uint16_t* dstP = (uint16_t*)dst.fImage; +- size_t dstRB = dst.fRowBytes; +- for (int y = 0; y < height; ++y) { +- for (int x = 0; x < width; ++x) { +- dstP[x] = a8_to_rgb565(srcP[x]); +- } +- srcP += srcRB; +- dstP = (uint16_t*)((char*)dstP + dstRB); +- } +-} +- + #define SK_FREETYPE_LCD_LERP 160 + + static int lerp(int start, int end) { + SkASSERT((unsigned)SK_FREETYPE_LCD_LERP <= 256); + return start + ((end - start) * (SK_FREETYPE_LCD_LERP) >> 8); + } + + static uint16_t packLCD16(unsigned r, unsigned g, unsigned b) { +diff --git a/gfx/skia/src/core/SkScan_AntiPath.cpp b/gfx/skia/src/core/SkScan_AntiPath.cpp +--- a/gfx/skia/src/core/SkScan_AntiPath.cpp ++++ b/gfx/skia/src/core/SkScan_AntiPath.cpp +@@ -230,52 +230,16 @@ void SuperBlitter::blitH(int x, int y, i + fOffsetX); + + #ifdef SK_DEBUG + fRuns.assertValid(y & MASK, (1 << (8 - SHIFT))); + fCurrX = x + width; + #endif + } + +-static void set_left_rite_runs(SkAlphaRuns& runs, int ileft, U8CPU leftA, +- int n, U8CPU riteA) { +- SkASSERT(leftA <= 0xFF); +- SkASSERT(riteA <= 0xFF); +- +- int16_t* run = runs.fRuns; +- uint8_t* aa = runs.fAlpha; +- +- if (ileft > 0) { +- run[0] = ileft; +- aa[0] = 0; +- run += ileft; +- aa += ileft; +- } +- +- SkASSERT(leftA < 0xFF); +- if (leftA > 0) { +- *run++ = 1; +- *aa++ = leftA; +- } +- +- if (n > 0) { +- run[0] = n; +- aa[0] = 0xFF; +- run += n; +- aa += n; +- } +- +- SkASSERT(riteA < 0xFF); +- if (riteA > 0) { +- *run++ = 1; +- *aa++ = riteA; +- } +- run[0] = 0; +-} +- + void SuperBlitter::blitRect(int x, int y, int width, int height) { + SkASSERT(width > 0); + SkASSERT(height > 0); + + // blit leading rows + while ((y & MASK)) { + this->blitH(x, y++, width); + if (--height <= 0) { +diff --git a/gfx/skia/src/effects/SkGradientShader.cpp b/gfx/skia/src/effects/SkGradientShader.cpp +--- a/gfx/skia/src/effects/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/SkGradientShader.cpp +@@ -865,45 +865,16 @@ bool Linear_Gradient::setContext(const S + } while (0) + + namespace { + + typedef void (*LinearShadeProc)(TileProc proc, SkFixed dx, SkFixed fx, + SkPMColor* dstC, const SkPMColor* cache, + int toggle, int count); + +-// This function is deprecated, and will be replaced by +-// shadeSpan_linear_vertical_lerp() once Chrome has been weaned off of it. +-void shadeSpan_linear_vertical(TileProc proc, SkFixed dx, SkFixed fx, +- SkPMColor* SK_RESTRICT dstC, +- const SkPMColor* SK_RESTRICT cache, +- int toggle, int count) { +- if (proc == clamp_tileproc) { +- // Read out clamp values from beginning/end of the cache. No need to lerp +- // or dither +- if (fx < 0) { +- sk_memset32(dstC, cache[-1], count); +- return; +- } else if (fx > 0xFFFF) { +- sk_memset32(dstC, cache[Gradient_Shader::kCache32Count * 2], count); +- return; +- } +- } +- +- // We're a vertical gradient, so no change in a span. +- // If colors change sharply across the gradient, dithering is +- // insufficient (it subsamples the color space) and we need to lerp. +- unsigned fullIndex = proc(fx); +- unsigned fi = fullIndex >> (16 - Gradient_Shader::kCache32Bits); +- sk_memset32_dither(dstC, +- cache[toggle + fi], +- cache[(toggle ^ Gradient_Shader::kDitherStride32) + fi], +- count); +-} +- + // Linear interpolation (lerp) is unnecessary if there are no sharp + // discontinuities in the gradient - which must be true if there are + // only 2 colors - but it's cheap. + void shadeSpan_linear_vertical_lerp(TileProc proc, SkFixed dx, SkFixed fx, + SkPMColor* SK_RESTRICT dstC, + const SkPMColor* SK_RESTRICT cache, + int toggle, int count) { + if (proc == clamp_tileproc) { +@@ -2131,16 +2102,18 @@ protected: + buffer.writePoint(fCenter); + } + + private: + typedef Gradient_Shader INHERITED; + const SkPoint fCenter; + }; + ++#ifndef SK_SCALAR_IS_FLOAT ++ + #ifdef COMPUTE_SWEEP_TABLE + #define PI 3.14159265 + static bool gSweepTableReady; + static uint8_t gSweepTable[65]; + + /* Our table stores precomputed values for atan: [0...1] -> [0..PI/4] + We scale the results to [0..32] + */ +@@ -2168,20 +2141,23 @@ static const uint8_t gSweepTable[] = { + 10, 11, 11, 12, 12, 13, 13, 14, 15, 15, 16, 16, 17, 17, 18, 18, + 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 24, 24, 25, 25, 25, 26, + 26, 27, 27, 27, 28, 28, 29, 29, 29, 30, 30, 30, 31, 31, 31, 32, + 32 + }; + static const uint8_t* build_sweep_table() { return gSweepTable; } + #endif + ++#endif ++ + // divide numer/denom, with a bias of 6bits. Assumes numer <= denom + // and denom != 0. Since our table is 6bits big (+1), this is a nice fit. + // Same as (but faster than) SkFixedDiv(numer, denom) >> 10 + ++#ifndef SK_SCALAR_IS_FLOAT + //unsigned div_64(int numer, int denom); + static unsigned div_64(int numer, int denom) { + SkASSERT(numer <= denom); + SkASSERT(numer > 0); + SkASSERT(denom > 0); + + int nbits = SkCLZ(numer); + int dbits = SkCLZ(denom); +@@ -2294,16 +2270,17 @@ static unsigned atan_0_90(SkFixed y, SkF + result = 64 - result; + // pin to 63 + result -= result >> 6; + } + + SkASSERT(result <= 63); + return result; + } ++#endif + + // returns angle in a circle [0..2PI) -> [0..255] + #ifdef SK_SCALAR_IS_FLOAT + static unsigned SkATan2_255(float y, float x) { + // static const float g255Over2PI = 255 / (2 * SK_ScalarPI); + static const float g255Over2PI = 40.584510488433314f; + + float result = sk_float_atan2(y, x); +diff --git a/gfx/skia/src/opts/SkBlitRect_opts_SSE2.cpp b/gfx/skia/src/opts/SkBlitRect_opts_SSE2.cpp +--- a/gfx/skia/src/opts/SkBlitRect_opts_SSE2.cpp ++++ b/gfx/skia/src/opts/SkBlitRect_opts_SSE2.cpp +@@ -112,17 +112,17 @@ void BlitRect32_OpaqueWide_SSE2(SkPMColo + } + + void ColorRect32_SSE2(SkPMColor* destination, + int width, int height, + size_t rowBytes, uint32_t color) { + if (0 == height || 0 == width || 0 == color) { + return; + } +- unsigned colorA = SkGetPackedA32(color); ++ //unsigned colorA = SkGetPackedA32(color); + //if (255 == colorA) { + //if (width < 31) { + //BlitRect32_OpaqueNarrow_SSE2(destination, width, height, + //rowBytes, color); + //} else { + //BlitRect32_OpaqueWide_SSE2(destination, width, height, + //rowBytes, color); + //} +diff --git a/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp b/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp +--- a/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp ++++ b/gfx/skia/src/ports/SkFontHost_mac_coretext.cpp +@@ -75,20 +75,16 @@ static CGFloat CGRectGetMinY_inline(cons + static CGFloat CGRectGetMaxY_inline(const CGRect& rect) { + return rect.origin.y + rect.size.height; + } + + static CGFloat CGRectGetWidth_inline(const CGRect& rect) { + return rect.size.width; + } + +-static CGFloat CGRectGetHeight(const CGRect& rect) { +- return rect.size.height; +-} +- + /////////////////////////////////////////////////////////////////////////////// + + static void sk_memset_rect32(uint32_t* ptr, uint32_t value, size_t width, + size_t height, size_t rowBytes) { + SkASSERT(width); + SkASSERT(width * sizeof(uint32_t) <= rowBytes); + + if (width >= 32) { +@@ -125,28 +121,30 @@ static void sk_memset_rect32(uint32_t* p + *ptr++ = value; + } while (--w > 0); + ptr = (uint32_t*)((char*)ptr + rowBytes); + height -= 1; + } + } + } + ++#if 0 + // Potentially this should be made (1) public (2) optimized when width is small. + // Also might want 16 and 32 bit version + // + static void sk_memset_rect(void* ptr, U8CPU byte, size_t width, size_t height, + size_t rowBytes) { + uint8_t* dst = (uint8_t*)ptr; + while (height) { + memset(dst, byte, width); + dst += rowBytes; + height -= 1; + } + } ++#endif + + #include + + typedef uint32_t CGRGBPixel; + + static unsigned CGRGBPixel_getAlpha(CGRGBPixel pixel) { + return pixel & 0xFF; + } +@@ -250,23 +248,16 @@ static CGAffineTransform MatrixToCGAffin + return CGAffineTransformMake(ScalarToCG(matrix[SkMatrix::kMScaleX]) * sx, + -ScalarToCG(matrix[SkMatrix::kMSkewY]) * sy, + -ScalarToCG(matrix[SkMatrix::kMSkewX]) * sx, + ScalarToCG(matrix[SkMatrix::kMScaleY]) * sy, + ScalarToCG(matrix[SkMatrix::kMTransX]) * sx, + ScalarToCG(matrix[SkMatrix::kMTransY]) * sy); + } + +-static void CGAffineTransformToMatrix(const CGAffineTransform& xform, SkMatrix* matrix) { +- matrix->setAll( +- CGToScalar(xform.a), CGToScalar(xform.c), CGToScalar(xform.tx), +- CGToScalar(xform.b), CGToScalar(xform.d), CGToScalar(xform.ty), +- 0, 0, SK_Scalar1); +-} +- + static SkScalar getFontScale(CGFontRef cgFont) { + int unitsPerEm = CGFontGetUnitsPerEm(cgFont); + return SkScalarInvert(SkIntToScalar(unitsPerEm)); + } + + /////////////////////////////////////////////////////////////////////////////// + + #define BITMAP_INFO_RGB (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host) +@@ -1075,16 +1066,17 @@ static const uint8_t* getInverseTable(bo + if (!gInited) { + build_power_table(gWhiteTable, 1.5f); + build_power_table(gTable, 2.2f); + gInited = true; + } + return isWhite ? gWhiteTable : gTable; + } + ++#ifdef SK_USE_COLOR_LUMINANCE + static const uint8_t* getGammaTable(U8CPU luminance) { + static uint8_t gGammaTables[4][256]; + static bool gInited; + if (!gInited) { + #if 1 + float start = 1.1; + float stop = 2.1; + for (int i = 0; i < 4; ++i) { +@@ -1097,45 +1089,49 @@ static const uint8_t* getGammaTable(U8CP + build_power_table(gGammaTables[2], 1); + build_power_table(gGammaTables[3], 1); + #endif + gInited = true; + } + SkASSERT(0 == (luminance >> 8)); + return gGammaTables[luminance >> 6]; + } ++#endif + ++#ifndef SK_USE_COLOR_LUMINANCE + static void invertGammaMask(bool isWhite, CGRGBPixel rgb[], int width, + int height, size_t rb) { + const uint8_t* table = getInverseTable(isWhite); + for (int y = 0; y < height; ++y) { + for (int x = 0; x < width; ++x) { + uint32_t c = rgb[x]; + int r = (c >> 16) & 0xFF; + int g = (c >> 8) & 0xFF; + int b = (c >> 0) & 0xFF; + rgb[x] = (table[r] << 16) | (table[g] << 8) | table[b]; + } + rgb = (CGRGBPixel*)((char*)rgb + rb); + } + } ++#endif + + static void cgpixels_to_bits(uint8_t dst[], const CGRGBPixel src[], int count) { + while (count > 0) { + uint8_t mask = 0; + for (int i = 7; i >= 0; --i) { + mask |= (CGRGBPixel_getAlpha(*src++) >> 7) << i; + if (0 == --count) { + break; + } + } + *dst++ = mask; + } + } + ++#ifdef SK_USE_COLOR_LUMINANCE + static int lerpScale(int dst, int src, int scale) { + return dst + (scale * (src - dst) >> 23); + } + + static CGRGBPixel lerpPixel(CGRGBPixel dst, CGRGBPixel src, + int scaleR, int scaleG, int scaleB) { + int sr = (src >> 16) & 0xFF; + int sg = (src >> 8) & 0xFF; +@@ -1147,37 +1143,31 @@ static CGRGBPixel lerpPixel(CGRGBPixel d + int rr = lerpScale(dr, sr, scaleR); + int rg = lerpScale(dg, sg, scaleG); + int rb = lerpScale(db, sb, scaleB); + return (rr << 16) | (rg << 8) | rb; + } + + static void lerpPixels(CGRGBPixel dst[], const CGRGBPixel src[], int width, + int height, int rowBytes, int lumBits) { +-#ifdef SK_USE_COLOR_LUMINANCE + int scaleR = (1 << 23) * SkColorGetR(lumBits) / 0xFF; + int scaleG = (1 << 23) * SkColorGetG(lumBits) / 0xFF; + int scaleB = (1 << 23) * SkColorGetB(lumBits) / 0xFF; +-#else +- int scale = (1 << 23) * lumBits / SkScalerContext::kLuminance_Max; +- int scaleR = scale; +- int scaleG = scale; +- int scaleB = scale; +-#endif + + for (int y = 0; y < height; ++y) { + for (int x = 0; x < width; ++x) { + // bit-not the src, since it was drawn from black, so we need the + // compliment of those bits + dst[x] = lerpPixel(dst[x], ~src[x], scaleR, scaleG, scaleB); + } + src = (CGRGBPixel*)((char*)src + rowBytes); + dst = (CGRGBPixel*)((char*)dst + rowBytes); + } + } ++#endif + + #if 1 + static inline int r32_to_16(int x) { return SkR32ToR16(x); } + static inline int g32_to_16(int x) { return SkG32ToG16(x); } + static inline int b32_to_16(int x) { return SkB32ToB16(x); } + #else + static inline int round8to5(int x) { + return (x + 3 - (x >> 5) + (x >> 7)) >> 3; +@@ -1212,22 +1202,21 @@ static inline uint32_t rgb_to_lcd32(CGRG + return SkPackARGB32(0xFF, r, g, b); + } + + #define BLACK_LUMINANCE_LIMIT 0x40 + #define WHITE_LUMINANCE_LIMIT 0xA0 + + void SkScalerContext_Mac::generateImage(const SkGlyph& glyph) { + CGGlyph cgGlyph = (CGGlyph) glyph.getGlyphID(fBaseGlyphCount); +- + const bool isLCD = isLCDFormat(glyph.fMaskFormat); ++#ifdef SK_USE_COLOR_LUMINANCE + const bool isBW = SkMask::kBW_Format == glyph.fMaskFormat; + const bool isA8 = !isLCD && !isBW; +- +-#ifdef SK_USE_COLOR_LUMINANCE ++ + unsigned lumBits = fRec.getLuminanceColor(); + uint32_t xorMask = 0; + + if (isA8) { + // for A8, we just want a component (they're all the same) + lumBits = SkColorGetR(lumBits); + } + #else +diff --git a/gfx/skia/src/utils/mac/SkCreateCGImageRef.cpp b/gfx/skia/src/utils/mac/SkCreateCGImageRef.cpp +--- a/gfx/skia/src/utils/mac/SkCreateCGImageRef.cpp ++++ b/gfx/skia/src/utils/mac/SkCreateCGImageRef.cpp +@@ -163,59 +163,8 @@ private: + CGPDFDocumentRef fDoc; + }; + + static void CGDataProviderReleaseData_FromMalloc(void*, const void* data, + size_t size) { + sk_free((void*)data); + } + +-bool SkPDFDocumentToBitmap(SkStream* stream, SkBitmap* output) { +- size_t size = stream->getLength(); +- void* ptr = sk_malloc_throw(size); +- stream->read(ptr, size); +- CGDataProviderRef data = CGDataProviderCreateWithData(NULL, ptr, size, +- CGDataProviderReleaseData_FromMalloc); +- if (NULL == data) { +- return false; +- } +- +- CGPDFDocumentRef pdf = CGPDFDocumentCreateWithProvider(data); +- CGDataProviderRelease(data); +- if (NULL == pdf) { +- return false; +- } +- SkAutoPDFRelease releaseMe(pdf); +- +- CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1); +- if (NULL == page) { +- return false; +- } +- +- CGRect bounds = CGPDFPageGetBoxRect(page, kCGPDFMediaBox); +- +- int w = (int)CGRectGetWidth(bounds); +- int h = (int)CGRectGetHeight(bounds); +- +- SkBitmap bitmap; +- bitmap.setConfig(SkBitmap::kARGB_8888_Config, w, h); +- bitmap.allocPixels(); +- bitmap.eraseColor(SK_ColorWHITE); +- +- size_t bitsPerComponent; +- CGBitmapInfo info; +- getBitmapInfo(bitmap, &bitsPerComponent, &info, NULL); +- +- CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB(); +- CGContextRef ctx = CGBitmapContextCreate(bitmap.getPixels(), w, h, +- bitsPerComponent, bitmap.rowBytes(), +- cs, info); +- CGColorSpaceRelease(cs); +- +- if (ctx) { +- CGContextDrawPDFPage(ctx, page); +- CGContextRelease(ctx); +- } +- +- output->swap(bitmap); +- return true; +-} +- diff --git a/gfx/skia/patches/archive/0016-Bug-718849-Radial-gradients.patch b/gfx/skia/patches/archive/0016-Bug-718849-Radial-gradients.patch new file mode 100644 index 0000000000..e00fd8602e --- /dev/null +++ b/gfx/skia/patches/archive/0016-Bug-718849-Radial-gradients.patch @@ -0,0 +1,400 @@ +# HG changeset patch +# User Matt Woodrow +# Date 1339988782 -43200 +# Node ID 1e9dae659ee6c992f719fd4136efbcc5410ded37 +# Parent 946750f6d95febd199fb7b748e9d2c48fd01c8a6 +[mq]: skia-windows-gradients + +diff --git a/gfx/skia/src/effects/SkGradientShader.cpp b/gfx/skia/src/effects/SkGradientShader.cpp +--- a/gfx/skia/src/effects/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/SkGradientShader.cpp +@@ -847,16 +847,19 @@ bool Linear_Gradient::setContext(const S + fFlags |= SkShader::kConstInY32_Flag; + if ((fFlags & SkShader::kHasSpan16_Flag) && !paint.isDither()) { + // only claim this if we do have a 16bit mode (i.e. none of our + // colors have alpha), and if we are not dithering (which obviously + // is not const in Y). + fFlags |= SkShader::kConstInY16_Flag; + } + } ++ if (fStart == fEnd) { ++ fFlags &= ~kOpaqueAlpha_Flag; ++ } + return true; + } + + #define NO_CHECK_ITER \ + do { \ + unsigned fi = fx >> Gradient_Shader::kCache32Shift; \ + SkASSERT(fi <= 0xFF); \ + fx += dx; \ +@@ -976,16 +979,21 @@ void Linear_Gradient::shadeSpan(int x, i + TileProc proc = fTileProc; + const SkPMColor* SK_RESTRICT cache = this->getCache32(); + #ifdef USE_DITHER_32BIT_GRADIENT + int toggle = ((x ^ y) & 1) * kDitherStride32; + #else + int toggle = 0; + #endif + ++ if (fStart == fEnd) { ++ sk_bzero(dstC, count * sizeof(*dstC)); ++ return; ++ } ++ + if (fDstToIndexClass != kPerspective_MatrixClass) { + dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, + SkIntToScalar(y) + SK_ScalarHalf, &srcPt); + SkFixed dx, fx = SkScalarToFixed(srcPt.fX); + + if (fDstToIndexClass == kFixedStepInX_MatrixClass) { + SkFixed dxStorage[1]; + (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), dxStorage, NULL); +@@ -1169,16 +1177,21 @@ void Linear_Gradient::shadeSpan16(int x, + SkASSERT(count > 0); + + SkPoint srcPt; + SkMatrix::MapXYProc dstProc = fDstToIndexProc; + TileProc proc = fTileProc; + const uint16_t* SK_RESTRICT cache = this->getCache16(); + int toggle = ((x ^ y) & 1) * kDitherStride16; + ++ if (fStart == fEnd) { ++ sk_bzero(dstC, count * sizeof(*dstC)); ++ return; ++ } ++ + if (fDstToIndexClass != kPerspective_MatrixClass) { + dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, + SkIntToScalar(y) + SK_ScalarHalf, &srcPt); + SkFixed dx, fx = SkScalarToFixed(srcPt.fX); + + if (fDstToIndexClass == kFixedStepInX_MatrixClass) { + SkFixed dxStorage[1]; + (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), dxStorage, NULL); +@@ -1739,21 +1752,25 @@ void Radial_Gradient::shadeSpan(int x, i + possible circles on which the point may fall. Solving for t yields + the gradient value to use. + + If a<0, the start circle is entirely contained in the + end circle, and one of the roots will be <0 or >1 (off the line + segment). If a>0, the start circle falls at least partially + outside the end circle (or vice versa), and the gradient + defines a "tube" where a point may be on one circle (on the +- inside of the tube) or the other (outside of the tube). We choose +- one arbitrarily. ++ inside of the tube) or the other (outside of the tube). We choose ++ the one with the highest t value, as long as the radius that it ++ corresponds to is >=0. In the case where neither root has a positive ++ radius, we don't draw anything. + ++ XXXmattwoodrow: I've removed this for now since it breaks ++ down when Dr == 0. Is there something else we can do instead? + In order to keep the math to within the limits of fixed point, +- we divide the entire quadratic by Dr^2, and replace ++ we divide the entire quadratic by Dr, and replace + (x - Sx)/Dr with x' and (y - Sy)/Dr with y', giving + + [Dx^2 / Dr^2 + Dy^2 / Dr^2 - 1)] * t^2 + + 2 * [x' * Dx / Dr + y' * Dy / Dr - Sr / Dr] * t + + [x'^2 + y'^2 - Sr^2/Dr^2] = 0 + + (x' and y' are computed by appending the subtract and scale to the + fDstToIndex matrix in the constructor). +@@ -1763,99 +1780,122 @@ void Radial_Gradient::shadeSpan(int x, i + x' and y', if x and y are linear in the span, 'B' can be computed + incrementally with a simple delta (db below). If it is not (e.g., + a perspective projection), it must be computed in the loop. + + */ + + namespace { + +-inline SkFixed two_point_radial(SkScalar b, SkScalar fx, SkScalar fy, +- SkScalar sr2d2, SkScalar foura, +- SkScalar oneOverTwoA, bool posRoot) { ++inline bool two_point_radial(SkScalar b, SkScalar fx, SkScalar fy, ++ SkScalar sr2d2, SkScalar foura, ++ SkScalar oneOverTwoA, SkScalar diffRadius, ++ SkScalar startRadius, SkFixed& t) { + SkScalar c = SkScalarSquare(fx) + SkScalarSquare(fy) - sr2d2; + if (0 == foura) { +- return SkScalarToFixed(SkScalarDiv(-c, b)); ++ SkScalar result = SkScalarDiv(-c, b); ++ if (result * diffRadius + startRadius >= 0) { ++ t = SkScalarToFixed(result); ++ return true; ++ } ++ return false; + } + + SkScalar discrim = SkScalarSquare(b) - SkScalarMul(foura, c); + if (discrim < 0) { +- discrim = -discrim; ++ return false; + } + SkScalar rootDiscrim = SkScalarSqrt(discrim); +- SkScalar result; +- if (posRoot) { +- result = SkScalarMul(-b + rootDiscrim, oneOverTwoA); +- } else { +- result = SkScalarMul(-b - rootDiscrim, oneOverTwoA); ++ ++ // Make sure the results corresponds to a positive radius. ++ SkScalar result = SkScalarMul(-b + rootDiscrim, oneOverTwoA); ++ if (result * diffRadius + startRadius >= 0) { ++ t = SkScalarToFixed(result); ++ return true; + } +- return SkScalarToFixed(result); ++ result = SkScalarMul(-b - rootDiscrim, oneOverTwoA); ++ if (result * diffRadius + startRadius >= 0) { ++ t = SkScalarToFixed(result); ++ return true; ++ } ++ ++ return false; + } + + typedef void (* TwoPointRadialShadeProc)(SkScalar fx, SkScalar dx, + SkScalar fy, SkScalar dy, + SkScalar b, SkScalar db, +- SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, bool posRoot, ++ SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, ++ SkScalar fDiffRadius, SkScalar fRadius1, + SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, + int count); + + void shadeSpan_twopoint_clamp(SkScalar fx, SkScalar dx, + SkScalar fy, SkScalar dy, + SkScalar b, SkScalar db, +- SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, bool posRoot, ++ SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, ++ SkScalar fDiffRadius, SkScalar fRadius1, + SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, + int count) { + for (; count > 0; --count) { +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, +- fOneOverTwoA, posRoot); +- +- if (t < 0) { ++ SkFixed t; ++ if (!two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, fDiffRadius, fRadius1, t)) { ++ *(dstC++) = 0; ++ } else if (t < 0) { + *dstC++ = cache[-1]; + } else if (t > 0xFFFF) { + *dstC++ = cache[Gradient_Shader::kCache32Count * 2]; + } else { + SkASSERT(t <= 0xFFFF); + *dstC++ = cache[t >> Gradient_Shader::kCache32Shift]; + } + + fx += dx; + fy += dy; + b += db; + } + } + void shadeSpan_twopoint_mirror(SkScalar fx, SkScalar dx, + SkScalar fy, SkScalar dy, + SkScalar b, SkScalar db, +- SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, bool posRoot, ++ SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, ++ SkScalar fDiffRadius, SkScalar fRadius1, + SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, + int count) { + for (; count > 0; --count) { +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, +- fOneOverTwoA, posRoot); +- SkFixed index = mirror_tileproc(t); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> Gradient_Shader::kCache32Shift]; ++ SkFixed t; ++ if (!two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, fDiffRadius, fRadius1, t)) { ++ *(dstC++) = 0; ++ } else { ++ SkFixed index = mirror_tileproc(t); ++ SkASSERT(index <= 0xFFFF); ++ *dstC++ = cache[index >> (16 - Gradient_Shader::kCache32Shift)]; ++ } + fx += dx; + fy += dy; + b += db; + } + } + + void shadeSpan_twopoint_repeat(SkScalar fx, SkScalar dx, + SkScalar fy, SkScalar dy, + SkScalar b, SkScalar db, +- SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, bool posRoot, ++ SkScalar fSr2D2, SkScalar foura, SkScalar fOneOverTwoA, ++ SkScalar fDiffRadius, SkScalar fRadius1, + SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, + int count) { + for (; count > 0; --count) { +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, +- fOneOverTwoA, posRoot); +- SkFixed index = repeat_tileproc(t); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> Gradient_Shader::kCache32Shift]; ++ SkFixed t; ++ if (!two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, fDiffRadius, fRadius1, t)) { ++ *(dstC++) = 0; ++ } else { ++ SkFixed index = repeat_tileproc(t); ++ SkASSERT(index <= 0xFFFF); ++ *dstC++ = cache[index >> (16 - Gradient_Shader::kCache32Shift)]; ++ } + fx += dx; + fy += dy; + b += db; + } + } + + + +@@ -1935,17 +1975,16 @@ public: + sk_bzero(dstC, count * sizeof(*dstC)); + return; + } + SkMatrix::MapXYProc dstProc = fDstToIndexProc; + TileProc proc = fTileProc; + const SkPMColor* SK_RESTRICT cache = this->getCache32(); + + SkScalar foura = fA * 4; +- bool posRoot = fDiffRadius < 0; + if (fDstToIndexClass != kPerspective_MatrixClass) { + SkPoint srcPt; + dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, + SkIntToScalar(y) + SK_ScalarHalf, &srcPt); + SkScalar dx, fx = srcPt.fX; + SkScalar dy, fy = srcPt.fY; + + if (fDstToIndexClass == kFixedStepInX_MatrixClass) { +@@ -1954,60 +1993,69 @@ public: + dx = SkFixedToScalar(fixedX); + dy = SkFixedToScalar(fixedY); + } else { + SkASSERT(fDstToIndexClass == kLinear_MatrixClass); + dx = fDstToIndex.getScaleX(); + dy = fDstToIndex.getSkewY(); + } + SkScalar b = (SkScalarMul(fDiff.fX, fx) + +- SkScalarMul(fDiff.fY, fy) - fStartRadius) * 2; ++ SkScalarMul(fDiff.fY, fy) - fStartRadius * fDiffRadius) * 2; + SkScalar db = (SkScalarMul(fDiff.fX, dx) + + SkScalarMul(fDiff.fY, dy)) * 2; + + TwoPointRadialShadeProc shadeProc = shadeSpan_twopoint_repeat; + if (proc == clamp_tileproc) { + shadeProc = shadeSpan_twopoint_clamp; + } else if (proc == mirror_tileproc) { + shadeProc = shadeSpan_twopoint_mirror; + } else { + SkASSERT(proc == repeat_tileproc); + } + (*shadeProc)(fx, dx, fy, dy, b, db, +- fSr2D2, foura, fOneOverTwoA, posRoot, ++ fSr2D2, foura, fOneOverTwoA, fDiffRadius, fRadius1, + dstC, cache, count); + } else { // perspective case + SkScalar dstX = SkIntToScalar(x); + SkScalar dstY = SkIntToScalar(y); + for (; count > 0; --count) { + SkPoint srcPt; + dstProc(fDstToIndex, dstX, dstY, &srcPt); + SkScalar fx = srcPt.fX; + SkScalar fy = srcPt.fY; + SkScalar b = (SkScalarMul(fDiff.fX, fx) + + SkScalarMul(fDiff.fY, fy) - fStartRadius) * 2; +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, +- fOneOverTwoA, posRoot); +- SkFixed index = proc(t); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> Gradient_Shader::kCache32Shift]; ++ SkFixed t; ++ if (!two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, fDiffRadius, fRadius1, t)) { ++ *(dstC++) = 0; ++ } else { ++ SkFixed index = proc(t); ++ SkASSERT(index <= 0xFFFF); ++ *dstC++ = cache[index >> (16 - kCache32Bits)]; ++ } + dstX += SK_Scalar1; + } + } + } + + virtual bool setContext(const SkBitmap& device, + const SkPaint& paint, + const SkMatrix& matrix) SK_OVERRIDE { + if (!this->INHERITED::setContext(device, paint, matrix)) { + return false; + } + + // we don't have a span16 proc + fFlags &= ~kHasSpan16_Flag; ++ ++ // If we might end up wanting to draw nothing as part of the gradient ++ // then we should mark ourselves as not being opaque. ++ if (fA >= 0 || (fDiffRadius == 0 && fCenter1 == fCenter2)) { ++ fFlags &= ~kOpaqueAlpha_Flag; ++ } + return true; + } + + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Two_Point_Radial_Gradient) + + protected: + Two_Point_Radial_Gradient(SkFlattenableReadBuffer& buffer) + : INHERITED(buffer), +@@ -2033,26 +2081,22 @@ private: + const SkScalar fRadius1; + const SkScalar fRadius2; + SkPoint fDiff; + SkScalar fStartRadius, fDiffRadius, fSr2D2, fA, fOneOverTwoA; + + void init() { + fDiff = fCenter1 - fCenter2; + fDiffRadius = fRadius2 - fRadius1; +- SkScalar inv = SkScalarInvert(fDiffRadius); +- fDiff.fX = SkScalarMul(fDiff.fX, inv); +- fDiff.fY = SkScalarMul(fDiff.fY, inv); +- fStartRadius = SkScalarMul(fRadius1, inv); ++ fStartRadius = fRadius1; + fSr2D2 = SkScalarSquare(fStartRadius); +- fA = SkScalarSquare(fDiff.fX) + SkScalarSquare(fDiff.fY) - SK_Scalar1; ++ fA = SkScalarSquare(fDiff.fX) + SkScalarSquare(fDiff.fY) - SkScalarSquare(fDiffRadius); + fOneOverTwoA = fA ? SkScalarInvert(fA * 2) : 0; + + fPtsToUnit.setTranslate(-fCenter1.fX, -fCenter1.fY); +- fPtsToUnit.postScale(inv, inv); + } + }; + + /////////////////////////////////////////////////////////////////////////////// + + class Sweep_Gradient : public Gradient_Shader { + public: + Sweep_Gradient(SkScalar cx, SkScalar cy, const SkColor colors[], +@@ -2488,16 +2532,20 @@ SkShader* SkGradientShader::CreateTwoPoi + int colorCount, + SkShader::TileMode mode, + SkUnitMapper* mapper) { + if (startRadius < 0 || endRadius < 0 || NULL == colors || colorCount < 1) { + return NULL; + } + EXPAND_1_COLOR(colorCount); + ++ if (start == end && startRadius == 0) { ++ return CreateRadial(start, endRadius, colors, pos, colorCount, mode, mapper); ++ } ++ + return SkNEW_ARGS(Two_Point_Radial_Gradient, + (start, startRadius, end, endRadius, colors, pos, + colorCount, mode, mapper)); + } + + SkShader* SkGradientShader::CreateSweep(SkScalar cx, SkScalar cy, + const SkColor colors[], + const SkScalar pos[], diff --git a/gfx/skia/patches/archive/0017-Bug-740194-SkMemory-mozalloc.patch b/gfx/skia/patches/archive/0017-Bug-740194-SkMemory-mozalloc.patch new file mode 100644 index 0000000000..719fda1650 --- /dev/null +++ b/gfx/skia/patches/archive/0017-Bug-740194-SkMemory-mozalloc.patch @@ -0,0 +1,73 @@ +commit 5786f516119bcb677510f3c9256b870c3b5616c8 +Author: George Wright +Date: Wed Aug 15 23:51:34 2012 -0400 + + Bug 740194 - [Skia] Implement a version of SkMemory for Mozilla that uses the infallible mozalloc allocators r=cjones + +diff --git a/gfx/skia/include/config/SkUserConfig.h b/gfx/skia/include/config/SkUserConfig.h +index f98ba85..17be191 100644 +--- a/gfx/skia/include/config/SkUserConfig.h ++++ b/gfx/skia/include/config/SkUserConfig.h +@@ -35,6 +35,16 @@ + commented out, so including it will have no effect. + */ + ++/* ++ Override new/delete with Mozilla's allocator, mozalloc ++ ++ Ideally we shouldn't need to do this here, but until ++ http://code.google.com/p/skia/issues/detail?id=598 is fixed ++ we need to include this here to override operator new and delete ++*/ ++ ++#include "mozilla/mozalloc.h" ++ + /////////////////////////////////////////////////////////////////////////////// + + /* Scalars (the fractional value type in skia) can be implemented either as +diff --git a/gfx/skia/src/ports/SkMemory_mozalloc.cpp b/gfx/skia/src/ports/SkMemory_mozalloc.cpp +new file mode 100644 +index 0000000..1f16ee5 +--- /dev/null ++++ b/gfx/skia/src/ports/SkMemory_mozalloc.cpp +@@ -0,0 +1,40 @@ ++/* ++ * Copyright 2011 Google Inc. ++ * Copyright 2012 Mozilla Foundation ++ * ++ * Use of this source code is governed by a BSD-style license that can be ++ * found in the LICENSE file. ++ */ ++ ++#include "SkTypes.h" ++ ++#include "mozilla/mozalloc.h" ++#include "mozilla/mozalloc_abort.h" ++#include "mozilla/mozalloc_oom.h" ++ ++void sk_throw() { ++ SkDEBUGFAIL("sk_throw"); ++ mozalloc_abort("Abort from sk_throw"); ++} ++ ++void sk_out_of_memory(void) { ++ SkDEBUGFAIL("sk_out_of_memory"); ++ mozalloc_handle_oom(0); ++} ++ ++void* sk_malloc_throw(size_t size) { ++ return sk_malloc_flags(size, SK_MALLOC_THROW); ++} ++ ++void* sk_realloc_throw(void* addr, size_t size) { ++ return moz_xrealloc(addr, size); ++} ++ ++void sk_free(void* p) { ++ free(p); ++} ++ ++void* sk_malloc_flags(size_t size, unsigned flags) { ++ return (flags & SK_MALLOC_THROW) ? moz_xmalloc(size) : malloc(size); ++} ++ diff --git a/gfx/skia/patches/archive/0018-Bug-817356-PPC-defines.patch b/gfx/skia/patches/archive/0018-Bug-817356-PPC-defines.patch new file mode 100644 index 0000000000..d16ec4b3b4 --- /dev/null +++ b/gfx/skia/patches/archive/0018-Bug-817356-PPC-defines.patch @@ -0,0 +1,14 @@ +Index: gfx/skia/include/core/SkPreConfig.h +=================================================================== +--- gfx/skia/include/core/SkPreConfig.h (revision 6724) ++++ gfx/skia/include/core/SkPreConfig.h (working copy) +@@ -94,7 +94,8 @@ + ////////////////////////////////////////////////////////////////////// + + #if !defined(SK_CPU_BENDIAN) && !defined(SK_CPU_LENDIAN) +- #if defined (__ppc__) || defined(__ppc64__) ++ #if defined (__ppc__) || defined(__PPC__) || defined(__ppc64__) \ ++ || defined(__PPC64__) + #define SK_CPU_BENDIAN + #else + #define SK_CPU_LENDIAN diff --git a/gfx/skia/patches/archive/0022-Bug-848491-Re-apply-bug-795538-Ensure-we-use-the-cor.patch b/gfx/skia/patches/archive/0022-Bug-848491-Re-apply-bug-795538-Ensure-we-use-the-cor.patch new file mode 100644 index 0000000000..97404c431b --- /dev/null +++ b/gfx/skia/patches/archive/0022-Bug-848491-Re-apply-bug-795538-Ensure-we-use-the-cor.patch @@ -0,0 +1,39 @@ +From: George Wright +Date: Thu, 20 Jun 2013 09:21:21 -0400 +Subject: Bug 848491 - Re-apply bug 795538 - Ensure we use the correct colour (and alpha) for the clamp values r=mattwoodrow + + +diff --git a/gfx/skia/src/effects/gradients/SkGradientShader.cpp b/gfx/skia/src/effects/gradients/SkGradientShader.cpp +index 27a9c46..ce077b5 100644 +--- a/gfx/skia/src/effects/gradients/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/gradients/SkGradientShader.cpp +@@ -500,15 +500,17 @@ const SkPMColor* SkGradientShaderBase::getCache32() const { + } + + // Write the clamp colours into the first and last entries of fCache32 +- fCache32[kCache32ClampLower] = SkPackARGB32(fCacheAlpha, +- SkColorGetR(fOrigColors[0]), +- SkColorGetG(fOrigColors[0]), +- SkColorGetB(fOrigColors[0])); +- +- fCache32[kCache32ClampUpper] = SkPackARGB32(fCacheAlpha, +- SkColorGetR(fOrigColors[fColorCount - 1]), +- SkColorGetG(fOrigColors[fColorCount - 1]), +- SkColorGetB(fOrigColors[fColorCount - 1])); ++ fCache32[kCache32ClampLower] = SkPremultiplyARGBInline(SkMulDiv255Round(SkColorGetA(fOrigColors[0]), ++ fCacheAlpha), ++ SkColorGetR(fOrigColors[0]), ++ SkColorGetG(fOrigColors[0]), ++ SkColorGetB(fOrigColors[0])); ++ ++ fCache32[kCache32ClampUpper] = SkPremultiplyARGBInline(SkMulDiv255Round(SkColorGetA(fOrigColors[fColorCount - 1]), ++ fCacheAlpha), ++ SkColorGetR(fOrigColors[fColorCount - 1]), ++ SkColorGetG(fOrigColors[fColorCount - 1]), ++ SkColorGetB(fOrigColors[fColorCount - 1])); + + return fCache32; + } +-- +1.7.11.7 + diff --git a/gfx/skia/patches/archive/0023-Bug-890539-Fix-SK_COMPILE_ASSERT-build-warning.patch b/gfx/skia/patches/archive/0023-Bug-890539-Fix-SK_COMPILE_ASSERT-build-warning.patch new file mode 100644 index 0000000000..9bc7ddec46 --- /dev/null +++ b/gfx/skia/patches/archive/0023-Bug-890539-Fix-SK_COMPILE_ASSERT-build-warning.patch @@ -0,0 +1,39 @@ +# HG changeset patch +# Parent e378875000890099fffcdb4cbc4ab12828ac34ee +# User Daniel Holbert +Bug 890539: Annotate SK_COMPILE_ASSERT's typedef as permissibly unused, to fix GCC 4.8 build warning. r=gw280 + +diff --git a/gfx/skia/include/core/SkTypes.h b/gfx/skia/include/core/SkTypes.h +--- a/gfx/skia/include/core/SkTypes.h ++++ b/gfx/skia/include/core/SkTypes.h +@@ -121,18 +121,29 @@ inline void operator delete(void* p) { + #define SkDEVCODE(code) + #define SK_DEVELOPER_TO_STRING() + #endif + + template + struct SkCompileAssert { + }; + ++/* ++ * The SK_COMPILE_ASSERT definition creates an otherwise-unused typedef. This ++ * triggers compiler warnings with some versions of gcc, so mark the typedef ++ * as permissibly-unused to disable the warnings. ++ */ ++# if defined(__GNUC__) ++# define SK_COMPILE_ASSERT_UNUSED_ATTRIBUTE __attribute__((unused)) ++# else ++# define SK_COMPILE_ASSERT_UNUSED_ATTRIBUTE /* nothing */ ++# endif ++ + #define SK_COMPILE_ASSERT(expr, msg) \ +- typedef SkCompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1] ++ typedef SkCompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1] SK_COMPILE_ASSERT_UNUSED_ATTRIBUTE + + /* + * Usage: SK_MACRO_CONCAT(a, b) to construct the symbol ab + * + * SK_MACRO_CONCAT_IMPL_PRIV just exists to make this work. Do not use directly + * + */ + #define SK_MACRO_CONCAT(X, Y) SK_MACRO_CONCAT_IMPL_PRIV(X, Y) diff --git a/gfx/skia/patches/archive/0024-Bug-887318-fix-bgra-readback.patch b/gfx/skia/patches/archive/0024-Bug-887318-fix-bgra-readback.patch new file mode 100644 index 0000000000..864a0af7a9 --- /dev/null +++ b/gfx/skia/patches/archive/0024-Bug-887318-fix-bgra-readback.patch @@ -0,0 +1,217 @@ +diff --git a/gfx/gl/GLContextSkia.cpp b/gfx/gl/GLContextSkia.cpp +--- a/gfx/gl/GLContextSkia.cpp ++++ b/gfx/gl/GLContextSkia.cpp +@@ -303,39 +303,47 @@ const GLubyte* glGetString_mozilla(GrGLe + if (name == LOCAL_GL_VERSION) { + if (sGLContext.get()->IsGLES2()) { + return reinterpret_cast("OpenGL ES 2.0"); + } else { + return reinterpret_cast("2.0"); + } + } else if (name == LOCAL_GL_EXTENSIONS) { + // Only expose the bare minimum extensions we want to support to ensure a functional Ganesh + // as GLContext only exposes certain extensions + static bool extensionsStringBuilt = false; +- static char extensionsString[120]; ++ static char extensionsString[256]; + + if (!extensionsStringBuilt) { + if (sGLContext.get()->IsExtensionSupported(GLContext::EXT_texture_format_BGRA8888)) { + strcpy(extensionsString, "GL_EXT_texture_format_BGRA8888 "); + } + + if (sGLContext.get()->IsExtensionSupported(GLContext::OES_packed_depth_stencil)) { + strcat(extensionsString, "GL_OES_packed_depth_stencil "); + } + + if (sGLContext.get()->IsExtensionSupported(GLContext::EXT_packed_depth_stencil)) { + strcat(extensionsString, "GL_EXT_packed_depth_stencil "); + } + + if (sGLContext.get()->IsExtensionSupported(GLContext::OES_rgb8_rgba8)) { + strcat(extensionsString, "GL_OES_rgb8_rgba8 "); + } + ++ if (sGLContext.get()->IsExtensionSupported(GLContext::EXT_bgra)) { ++ strcat(extensionsString, "GL_EXT_bgra "); ++ } ++ ++ if (sGLContext.get()->IsExtensionSupported(GLContext::EXT_read_format_bgra)) { ++ strcat(extensionsString, "GL_EXT_read_format_bgra "); ++ } ++ + extensionsStringBuilt = true; + } + + return reinterpret_cast(extensionsString); + + } else if (name == LOCAL_GL_SHADING_LANGUAGE_VERSION) { + if (sGLContext.get()->IsGLES2()) { + return reinterpret_cast("OpenGL ES GLSL ES 1.0"); + } else { + return reinterpret_cast("1.10"); +diff --git a/gfx/skia/src/gpu/gl/GrGpuGL.cpp b/gfx/skia/src/gpu/gl/GrGpuGL.cpp +--- a/gfx/skia/src/gpu/gl/GrGpuGL.cpp ++++ b/gfx/skia/src/gpu/gl/GrGpuGL.cpp +@@ -1,18 +1,18 @@ + /* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +- ++#include + #include "GrGpuGL.h" + #include "GrGLStencilBuffer.h" + #include "GrGLPath.h" + #include "GrGLShaderBuilder.h" + #include "GrTemplates.h" + #include "GrTypes.h" + #include "SkTemplates.h" + + static const GrGLuint GR_MAX_GLUINT = ~0U; + static const GrGLint GR_INVAL_GLINT = ~0; +@@ -1381,29 +1381,67 @@ bool GrGpuGL::readPixelsWillPayForYFlip( + // Note the rowBytes might be tight to the passed in data, but if data + // gets clipped in x to the target the rowBytes will no longer be tight. + if (left >= 0 && (left + width) < renderTarget->width()) { + return 0 == rowBytes || + GrBytesPerPixel(config) * width == rowBytes; + } else { + return false; + } + } + ++static void swizzleRow(void* buffer, int byteLen) { ++ uint8_t* src = (uint8_t*)buffer; ++ uint8_t* end = src + byteLen; ++ ++ GrAssert((end - src) % 4 == 0); ++ ++ for (; src != end; src += 4) { ++ std::swap(src[0], src[2]); ++ } ++} ++ ++bool GrGpuGL::canReadBGRA() const ++{ ++ if (kDesktop_GrGLBinding == this->glBinding() || ++ this->hasExtension("GL_EXT_bgra")) ++ return true; ++ ++ if (this->hasExtension("GL_EXT_read_format_bgra")) { ++ GrGLint readFormat = 0; ++ GrGLint readType = 0; ++ ++ GL_CALL(GetIntegerv(GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT, &readFormat)); ++ GL_CALL(GetIntegerv(GR_GL_IMPLEMENTATION_COLOR_READ_TYPE, &readType)); ++ ++ return readFormat == GR_GL_BGRA && readType == GR_GL_UNSIGNED_BYTE; ++ } ++ ++ return false; ++} ++ + bool GrGpuGL::onReadPixels(GrRenderTarget* target, + int left, int top, + int width, int height, + GrPixelConfig config, + void* buffer, + size_t rowBytes) { + GrGLenum format; + GrGLenum type; + bool flipY = kBottomLeft_GrSurfaceOrigin == target->origin(); ++ bool needSwizzle = false; ++ ++ if (kBGRA_8888_GrPixelConfig == config && !this->canReadBGRA()) { ++ // Read RGBA and swizzle after ++ config = kRGBA_8888_GrPixelConfig; ++ needSwizzle = true; ++ } ++ + if (!this->configToGLFormats(config, false, NULL, &format, &type)) { + return false; + } + size_t bpp = GrBytesPerPixel(config); + if (!adjust_pixel_ops_params(target->width(), target->height(), bpp, + &left, &top, &width, &height, + const_cast(&buffer), + &rowBytes)) { + return false; + } +@@ -1478,35 +1516,46 @@ bool GrGpuGL::onReadPixels(GrRenderTarge + scratch.reset(tightRowBytes); + void* tmpRow = scratch.get(); + // flip y in-place by rows + const int halfY = height >> 1; + char* top = reinterpret_cast(buffer); + char* bottom = top + (height - 1) * rowBytes; + for (int y = 0; y < halfY; y++) { + memcpy(tmpRow, top, tightRowBytes); + memcpy(top, bottom, tightRowBytes); + memcpy(bottom, tmpRow, tightRowBytes); ++ ++ if (needSwizzle) { ++ swizzleRow(top, tightRowBytes); ++ swizzleRow(bottom, tightRowBytes); ++ } ++ + top += rowBytes; + bottom -= rowBytes; + } + } + } else { +- GrAssert(readDst != buffer); GrAssert(rowBytes != tightRowBytes); ++ GrAssert(readDst != buffer); ++ GrAssert(rowBytes != tightRowBytes); + // copy from readDst to buffer while flipping y + // const int halfY = height >> 1; + const char* src = reinterpret_cast(readDst); + char* dst = reinterpret_cast(buffer); + if (flipY) { + dst += (height-1) * rowBytes; + } + for (int y = 0; y < height; y++) { + memcpy(dst, src, tightRowBytes); ++ if (needSwizzle) { ++ swizzleRow(dst, tightRowBytes); ++ } ++ + src += readDstRowBytes; + if (!flipY) { + dst += rowBytes; + } else { + dst -= rowBytes; + } + } + } + return true; + } +diff --git a/gfx/skia/src/gpu/gl/GrGpuGL.h b/gfx/skia/src/gpu/gl/GrGpuGL.h +--- a/gfx/skia/src/gpu/gl/GrGpuGL.h ++++ b/gfx/skia/src/gpu/gl/GrGpuGL.h +@@ -243,20 +243,22 @@ private: + GrPixelConfig dataConfig, + const void* data, + size_t rowBytes); + + bool createRenderTargetObjects(int width, int height, + GrGLuint texID, + GrGLRenderTarget::Desc* desc); + + void fillInConfigRenderableTable(); + ++ bool canReadBGRA() const; ++ + GrGLContext fGLContext; + + // GL program-related state + ProgramCache* fProgramCache; + SkAutoTUnref fCurrentProgram; + + /////////////////////////////////////////////////////////////////////////// + ///@name Caching of GL State + ///@{ + int fHWActiveTextureUnitIdx; diff --git a/gfx/skia/patches/archive/0025-Bug-896049-Add-default-Value-SK_OVERRIDE.patch b/gfx/skia/patches/archive/0025-Bug-896049-Add-default-Value-SK_OVERRIDE.patch new file mode 100644 index 0000000000..aff99f75f1 --- /dev/null +++ b/gfx/skia/patches/archive/0025-Bug-896049-Add-default-Value-SK_OVERRIDE.patch @@ -0,0 +1,26 @@ +diff --git a/gfx/skia/include/core/SkPostConfig.h b/gfx/skia/include/core/SkPostConfig.h +--- a/gfx/skia/include/core/SkPostConfig.h ++++ b/gfx/skia/include/core/SkPostConfig.h +@@ -325,19 +325,19 @@ + // Some documentation suggests we should be using __attribute__((override)), + // but it doesn't work. + #define SK_OVERRIDE override + #elif defined(__has_extension) + #if __has_extension(cxx_override_control) + #define SK_OVERRIDE override + #endif + #endif +- #else +- // Linux GCC ignores "__attribute__((override))" and rejects "override". +- #define SK_OVERRIDE ++ #endif ++ #ifndef SK_OVERRIDE ++ #define SK_OVERRIDE + #endif + #endif + + ////////////////////////////////////////////////////////////////////// + + #ifndef SK_PRINTF_LIKE + #if defined(__clang__) || defined(__GNUC__) + #define SK_PRINTF_LIKE(A, B) __attribute__((format(printf, (A), (B)))) diff --git a/gfx/skia/patches/archive/0026-Bug-901208-Fix-ARM-v4t.patch b/gfx/skia/patches/archive/0026-Bug-901208-Fix-ARM-v4t.patch new file mode 100644 index 0000000000..5c95b54014 --- /dev/null +++ b/gfx/skia/patches/archive/0026-Bug-901208-Fix-ARM-v4t.patch @@ -0,0 +1,83 @@ +diff --git a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +--- a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp ++++ b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +@@ -26,66 +26,78 @@ static void S32A_D565_Opaque(uint16_t* S + asm volatile ( + "1: \n\t" + "ldr r3, [%[src]], #4 \n\t" + "cmp r3, #0xff000000 \n\t" + "blo 2f \n\t" + "and r4, r3, #0x0000f8 \n\t" + "and r5, r3, #0x00fc00 \n\t" + "and r6, r3, #0xf80000 \n\t" ++#ifdef SK_ARM_HAS_EDSP + "pld [r1, #32] \n\t" ++#endif + "lsl r3, r4, #8 \n\t" + "orr r3, r3, r5, lsr #5 \n\t" + "orr r3, r3, r6, lsr #19 \n\t" + "subs %[count], %[count], #1 \n\t" + "strh r3, [%[dst]], #2 \n\t" + "bne 1b \n\t" + "b 4f \n\t" + "2: \n\t" + "lsrs r7, r3, #24 \n\t" + "beq 3f \n\t" + "ldrh r4, [%[dst]] \n\t" + "rsb r7, r7, #255 \n\t" + "and r6, r4, #0x001f \n\t" +-#if SK_ARM_ARCH == 6 ++#if SK_ARM_ARCH <= 6 + "lsl r5, r4, #21 \n\t" + "lsr r5, r5, #26 \n\t" + #else + "ubfx r5, r4, #5, #6 \n\t" + #endif ++#ifdef SK_ARM_HAS_EDSP + "pld [r0, #16] \n\t" ++#endif + "lsr r4, r4, #11 \n\t" + #ifdef SK_ARM_HAS_EDSP + "smulbb r6, r6, r7 \n\t" + "smulbb r5, r5, r7 \n\t" + "smulbb r4, r4, r7 \n\t" + #else + "mul r6, r6, r7 \n\t" + "mul r5, r5, r7 \n\t" + "mul r4, r4, r7 \n\t" + #endif ++#if SK_ARM_ARCH >= 6 + "uxtb r7, r3, ROR #16 \n\t" + "uxtb ip, r3, ROR #8 \n\t" ++#else ++ "mov ip, #0xff \n\t" ++ "and r7, ip, r3, ROR #16 \n\t" ++ "and ip, ip, r3, ROR #8 \n\t" ++#endif + "and r3, r3, #0xff \n\t" + "add r6, r6, #16 \n\t" + "add r5, r5, #32 \n\t" + "add r4, r4, #16 \n\t" + "add r6, r6, r6, lsr #5 \n\t" + "add r5, r5, r5, lsr #6 \n\t" + "add r4, r4, r4, lsr #5 \n\t" + "add r6, r7, r6, lsr #5 \n\t" + "add r5, ip, r5, lsr #6 \n\t" + "add r4, r3, r4, lsr #5 \n\t" + "lsr r6, r6, #3 \n\t" + "and r5, r5, #0xfc \n\t" + "and r4, r4, #0xf8 \n\t" + "orr r6, r6, r5, lsl #3 \n\t" + "orr r4, r6, r4, lsl #8 \n\t" + "strh r4, [%[dst]], #2 \n\t" ++#ifdef SK_ARM_HAS_EDSP + "pld [r1, #32] \n\t" ++#endif + "subs %[count], %[count], #1 \n\t" + "bne 1b \n\t" + "b 4f \n\t" + "3: \n\t" + "subs %[count], %[count], #1 \n\t" + "add %[dst], %[dst], #2 \n\t" + "bne 1b \n\t" + "4: \n\t" diff --git a/gfx/skia/patches/archive/0030-Bug-939629-Add-missing-include-guards.patch b/gfx/skia/patches/archive/0030-Bug-939629-Add-missing-include-guards.patch new file mode 100644 index 0000000000..c92bf2aaeb --- /dev/null +++ b/gfx/skia/patches/archive/0030-Bug-939629-Add-missing-include-guards.patch @@ -0,0 +1,94 @@ +# HG changeset patch +# Parent 979e60d9c09f22eb139643da6de7568b603e1aa1 + +diff --git a/gfx/skia/include/images/SkImages.h b/gfx/skia/include/images/SkImages.h +--- a/gfx/skia/include/images/SkImages.h ++++ b/gfx/skia/include/images/SkImages.h +@@ -1,14 +1,19 @@ + /* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + ++#ifndef SkImages_DEFINED ++#define SkImages_DEFINED ++ + class SkImages { + public: + /** + * Initializes flattenables in the images project. + */ + static void InitializeFlattenables(); + }; ++ ++#endif +diff --git a/gfx/skia/src/gpu/GrAAConvexPathRenderer.h b/gfx/skia/src/gpu/GrAAConvexPathRenderer.h +--- a/gfx/skia/src/gpu/GrAAConvexPathRenderer.h ++++ b/gfx/skia/src/gpu/GrAAConvexPathRenderer.h +@@ -1,16 +1,19 @@ + + /* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + ++#ifndef GrAAConvexPathRenderer_DEFINED ++#define GrAAConvexPathRenderer_DEFINED ++ + #include "GrPathRenderer.h" + + + class GrAAConvexPathRenderer : public GrPathRenderer { + public: + GrAAConvexPathRenderer(); + + virtual bool canDrawPath(const SkPath& path, +@@ -19,8 +22,10 @@ public: + bool antiAlias) const SK_OVERRIDE; + + protected: + virtual bool onDrawPath(const SkPath& path, + const SkStrokeRec& stroke, + GrDrawTarget* target, + bool antiAlias) SK_OVERRIDE; + }; ++ ++#endif +diff --git a/gfx/skia/src/gpu/GrReducedClip.h b/gfx/skia/src/gpu/GrReducedClip.h +--- a/gfx/skia/src/gpu/GrReducedClip.h ++++ b/gfx/skia/src/gpu/GrReducedClip.h +@@ -1,16 +1,19 @@ + + /* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + ++#ifndef GrReducedClip_DEFINED ++#define GrReducedClip_DEFINED ++ + #include "SkClipStack.h" + #include "SkTLList.h" + + namespace GrReducedClip { + + typedef SkTLList ElementList; + + enum InitialState { +@@ -33,8 +36,10 @@ enum InitialState { + void ReduceClipStack(const SkClipStack& stack, + const SkIRect& queryBounds, + ElementList* result, + InitialState* initialState, + SkIRect* tighterBounds = NULL, + bool* requiresAA = NULL); + + } // namespace GrReducedClip ++ ++#endif diff --git a/gfx/skia/patches/archive/0031-Bug-945588-Add-include-guard.patch b/gfx/skia/patches/archive/0031-Bug-945588-Add-include-guard.patch new file mode 100644 index 0000000000..f58e7e1659 --- /dev/null +++ b/gfx/skia/patches/archive/0031-Bug-945588-Add-include-guard.patch @@ -0,0 +1,39 @@ +# HG changeset patch +# User Ehsan Akhgari + +Bug 945588 - Add include guards to SkConfig8888.h + +diff --git a/gfx/skia/src/core/SkConfig8888.h b/gfx/skia/src/core/SkConfig8888.h +index 96eaef2..36bc9b4 100644 +--- a/gfx/skia/src/core/SkConfig8888.h ++++ b/gfx/skia/src/core/SkConfig8888.h +@@ -1,16 +1,18 @@ + + /* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + ++#ifndef SkConfig8888_DEFINED ++#define SkConfig8888_DEFINED + + #include "SkCanvas.h" + #include "SkColorPriv.h" + + /** + * Converts pixels from one Config8888 to another Config8888 + */ + void SkConvertConfig8888Pixels(uint32_t* dstPixels, +@@ -69,8 +71,10 @@ static inline void SkCopyConfig8888ToBitmap(const SkBitmap& dstBmp, + int h = dstBmp.height(); + size_t dstRowBytes = dstBmp.rowBytes(); + uint32_t* dstPixels = reinterpret_cast(dstBmp.getPixels()); + + SkConvertConfig8888Pixels(dstPixels, dstRowBytes, SkCanvas::kNative_Premul_Config8888, srcPixels, srcRowBytes, srcConfig8888, w, h); + } + + } ++ ++#endif diff --git a/gfx/skia/patches/archive/0032-Bug-974900-More-missing-include-guards.patch b/gfx/skia/patches/archive/0032-Bug-974900-More-missing-include-guards.patch new file mode 100644 index 0000000000..b6b8461213 --- /dev/null +++ b/gfx/skia/patches/archive/0032-Bug-974900-More-missing-include-guards.patch @@ -0,0 +1,148 @@ +# HG changeset patch +# Parent c8288d0c7a1544a590a0cac9c39397ac10c8a45b +Bug 974900 - Add missing include guards to Skia headers - r=gw280 + +diff --git a/gfx/skia/trunk/include/images/SkImages.h b/gfx/skia/trunk/include/images/SkImages.h +--- a/gfx/skia/trunk/include/images/SkImages.h ++++ b/gfx/skia/trunk/include/images/SkImages.h +@@ -1,14 +1,19 @@ + /* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + ++#ifndef SkImages_DEFINED ++#define SkImages_DEFINED ++ + class SkImages { + public: + /** + * Initializes flattenables in the images project. + */ + static void InitializeFlattenables(); + }; ++ ++#endif +diff --git a/gfx/skia/trunk/src/core/SkConvolver.h b/gfx/skia/trunk/src/core/SkConvolver.h +--- a/gfx/skia/trunk/src/core/SkConvolver.h ++++ b/gfx/skia/trunk/src/core/SkConvolver.h +@@ -8,16 +8,18 @@ + #include "SkSize.h" + #include "SkTypes.h" + #include "SkTArray.h" + + // avoid confusion with Mac OS X's math library (Carbon) + #if defined(__APPLE__) + #undef FloatToConvolutionFixed + #undef ConvolutionFixedToFloat ++#undef FloatToFixed ++#undef FixedToFloat + #endif + + // Represents a filter in one dimension. Each output pixel has one entry in this + // object for the filter values contributing to it. You build up the filter + // list by calling AddFilter for each output pixel (in order). + // + // We do 2-dimensional convolution by first convolving each row by one + // SkConvolutionFilter1D, then convolving each column by another one. +diff --git a/gfx/skia/trunk/src/gpu/GrAAConvexPathRenderer.h b/gfx/skia/trunk/src/gpu/GrAAConvexPathRenderer.h +--- a/gfx/skia/trunk/src/gpu/GrAAConvexPathRenderer.h ++++ b/gfx/skia/trunk/src/gpu/GrAAConvexPathRenderer.h +@@ -3,24 +3,28 @@ + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + #include "GrPathRenderer.h" + ++#ifndef GrAAConvexPathRenderer_DEFINED ++#define GrAAConvexPathRenderer_DEFINED + + class GrAAConvexPathRenderer : public GrPathRenderer { + public: + GrAAConvexPathRenderer(); + + virtual bool canDrawPath(const SkPath& path, + const SkStrokeRec& stroke, + const GrDrawTarget* target, + bool antiAlias) const SK_OVERRIDE; + + protected: + virtual bool onDrawPath(const SkPath& path, + const SkStrokeRec& stroke, + GrDrawTarget* target, + bool antiAlias) SK_OVERRIDE; + }; ++ ++#endif +diff --git a/gfx/skia/trunk/src/gpu/GrReducedClip.h b/gfx/skia/trunk/src/gpu/GrReducedClip.h +--- a/gfx/skia/trunk/src/gpu/GrReducedClip.h ++++ b/gfx/skia/trunk/src/gpu/GrReducedClip.h +@@ -1,16 +1,19 @@ + + /* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + ++#ifndef GrReducedClip_DEFINED ++#define GrReducedClip_DEFINED ++ + #include "SkClipStack.h" + #include "SkTLList.h" + + namespace GrReducedClip { + + typedef SkTLList ElementList; + + enum InitialState { +@@ -36,8 +39,10 @@ SK_API void ReduceClipStack(const SkClip + const SkIRect& queryBounds, + ElementList* result, + int32_t* resultGenID, + InitialState* initialState, + SkIRect* tighterBounds = NULL, + bool* requiresAA = NULL); + + } // namespace GrReducedClip ++ ++#endif +diff --git a/gfx/skia/trunk/src/pathops/SkLineParameters.h b/gfx/skia/trunk/src/pathops/SkLineParameters.h +--- a/gfx/skia/trunk/src/pathops/SkLineParameters.h ++++ b/gfx/skia/trunk/src/pathops/SkLineParameters.h +@@ -1,14 +1,18 @@ + /* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ ++ ++#ifndef SkLineParameters_DEFINED ++#define SkLineParameters_DEFINED ++ + #include "SkPathOpsCubic.h" + #include "SkPathOpsLine.h" + #include "SkPathOpsQuad.h" + + // Sources + // computer-aided design - volume 22 number 9 november 1990 pp 538 - 549 + // online at http://cagd.cs.byu.edu/~tom/papers/bezclip.pdf + +@@ -164,8 +168,10 @@ public: + return -a; + } + + private: + double a; + double b; + double c; + }; ++ ++#endif diff --git a/gfx/skia/patches/archive/0033-Bug-974900-undef-interface-windows.patch b/gfx/skia/patches/archive/0033-Bug-974900-undef-interface-windows.patch new file mode 100644 index 0000000000..05f17000a0 --- /dev/null +++ b/gfx/skia/patches/archive/0033-Bug-974900-undef-interface-windows.patch @@ -0,0 +1,27 @@ +# HG changeset patch +# Parent b12f9a408740aa5fd93c296a7d41e1b5f54c1b20 +Bug 974900 - #undef interface defined by windows headers - r=gw280 + +diff --git a/gfx/skia/trunk/src/gpu/gl/GrGLCaps.h b/gfx/skia/trunk/src/gpu/gl/GrGLCaps.h +--- a/gfx/skia/trunk/src/gpu/gl/GrGLCaps.h ++++ b/gfx/skia/trunk/src/gpu/gl/GrGLCaps.h +@@ -9,16 +9,19 @@ + #ifndef GrGLCaps_DEFINED + #define GrGLCaps_DEFINED + + #include "GrDrawTargetCaps.h" + #include "GrGLStencilBuffer.h" + #include "SkTArray.h" + #include "SkTDArray.h" + ++// defined in Windows headers ++#undef interface ++ + class GrGLContextInfo; + + /** + * Stores some capabilities of a GL context. Most are determined by the GL + * version and the extensions string. It also tracks formats that have passed + * the FBO completeness test. + */ + class GrGLCaps : public GrDrawTargetCaps { diff --git a/gfx/skia/patches/archive/SkPostConfig.patch b/gfx/skia/patches/archive/SkPostConfig.patch new file mode 100644 index 0000000000..d32341f4ea --- /dev/null +++ b/gfx/skia/patches/archive/SkPostConfig.patch @@ -0,0 +1,32 @@ +diff --git a/gfx/skia/include/core/SkPostConfig.h b/gfx/skia/include/core/SkPostConfig.h +--- a/gfx/skia/include/core/SkPostConfig.h ++++ b/gfx/skia/include/core/SkPostConfig.h +@@ -277,19 +277,28 @@ + #endif + + ////////////////////////////////////////////////////////////////////// + + #ifndef SK_OVERRIDE + #if defined(_MSC_VER) + #define SK_OVERRIDE override + #elif defined(__clang__) ++#if __has_feature(cxx_override_control) + // Some documentation suggests we should be using __attribute__((override)), + // but it doesn't work. + #define SK_OVERRIDE override ++#elif defined(__has_extension) ++#if __has_extension(cxx_override_control) ++#define SK_OVERRIDE override ++#endif ++#endif ++#ifndef SK_OVERRIDE ++#define SK_OVERRIDE ++#endif + #else + // Linux GCC ignores "__attribute__((override))" and rejects "override". + #define SK_OVERRIDE + #endif + #endif + + ////////////////////////////////////////////////////////////////////// + diff --git a/gfx/skia/patches/archive/arm-fixes.patch b/gfx/skia/patches/archive/arm-fixes.patch new file mode 100644 index 0000000000..d9fa430df0 --- /dev/null +++ b/gfx/skia/patches/archive/arm-fixes.patch @@ -0,0 +1,191 @@ +diff --git a/gfx/skia/include/core/SkMath.h b/gfx/skia/include/core/SkMath.h +--- a/gfx/skia/include/core/SkMath.h ++++ b/gfx/skia/include/core/SkMath.h +@@ -148,20 +148,17 @@ static inline bool SkIsPow2(int value) { + } + + /////////////////////////////////////////////////////////////////////////////// + + /** SkMulS16(a, b) multiplies a * b, but requires that a and b are both int16_t. + With this requirement, we can generate faster instructions on some + architectures. + */ +-#if defined(__arm__) \ +- && !defined(__thumb__) \ +- && !defined(__ARM_ARCH_4T__) \ +- && !defined(__ARM_ARCH_5T__) ++#ifdef SK_ARM_HAS_EDSP + static inline int32_t SkMulS16(S16CPU x, S16CPU y) { + SkASSERT((int16_t)x == x); + SkASSERT((int16_t)y == y); + int32_t product; + asm("smulbb %0, %1, %2 \n" + : "=r"(product) + : "r"(x), "r"(y) + ); +diff --git a/gfx/skia/include/core/SkPostConfig.h b/gfx/skia/include/core/SkPostConfig.h +--- a/gfx/skia/include/core/SkPostConfig.h ++++ b/gfx/skia/include/core/SkPostConfig.h +@@ -300,8 +300,53 @@ + #endif + #endif + + ////////////////////////////////////////////////////////////////////// + + #ifndef SK_ALLOW_STATIC_GLOBAL_INITIALIZERS + #define SK_ALLOW_STATIC_GLOBAL_INITIALIZERS 1 + #endif ++ ++////////////////////////////////////////////////////////////////////// ++// ARM defines ++ ++#if defined(__GNUC__) && defined(__arm__) ++ ++# define SK_ARM_ARCH 3 ++ ++# if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) \ ++ || defined(_ARM_ARCH_4) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 4 ++# endif ++ ++# if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \ ++ || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \ ++ || defined(__ARM_ARCH_5TEJ__) || defined(_ARM_ARCH_5) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 5 ++# endif ++ ++# if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ ++ || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \ ++ || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) \ ++ || defined(__ARM_ARCH_6M__) || defined(_ARM_ARCH_6) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 6 ++# endif ++ ++# if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ ++ || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ ++ || defined(__ARM_ARCH_7EM__) || defined(_ARM_ARCH_7) ++# undef SK_ARM_ARCH ++# define SK_ARM_ARCH 7 ++# endif ++ ++# undef SK_ARM_HAS_EDSP ++# if defined(__thumb2__) && (SK_ARM_ARCH >= 6) \ ++ || !defined(__thumb__) \ ++ && ((SK_ARM_ARCH > 5) || defined(__ARM_ARCH_5E__) \ ++ || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__)) ++# define SK_ARM_HAS_EDSP 1 ++# endif ++ ++#endif +diff --git a/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp b/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp +--- a/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp ++++ b/gfx/skia/src/opts/SkBitmapProcState_opts_arm.cpp +@@ -6,17 +6,17 @@ + * found in the LICENSE file. + */ + + + #include "SkBitmapProcState.h" + #include "SkColorPriv.h" + #include "SkUtils.h" + +-#if __ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN) ++#if SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN) + void SI8_D16_nofilter_DX_arm( + const SkBitmapProcState& s, + const uint32_t* SK_RESTRICT xy, + int count, + uint16_t* SK_RESTRICT colors) __attribute__((optimize("O1"))); + + void SI8_D16_nofilter_DX_arm(const SkBitmapProcState& s, + const uint32_t* SK_RESTRICT xy, +@@ -177,17 +177,17 @@ void SI8_opaque_D32_nofilter_DX_arm(cons + : [xx] "+r" (xx), [count] "+r" (count), [colors] "+r" (colors) + : [table] "r" (table), [srcAddr] "r" (srcAddr) + : "memory", "cc", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11" + ); + } + + s.fBitmap->getColorTable()->unlockColors(false); + } +-#endif //__ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN) ++#endif // SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN) + + /////////////////////////////////////////////////////////////////////////////// + + /* If we replace a sampleproc, then we null-out the associated shaderproc, + otherwise the shader won't even look at the matrix/sampler + */ + void SkBitmapProcState::platformProcs() { + bool doFilter = fDoFilter; +@@ -195,17 +195,17 @@ void SkBitmapProcState::platformProcs() + bool justDx = false; + + if (fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) { + justDx = true; + } + + switch (fBitmap->config()) { + case SkBitmap::kIndex8_Config: +-#if __ARM_ARCH__ >= 6 && !defined(SK_CPU_BENDIAN) ++#if SK_ARM_ARCH >= 6 && !defined(SK_CPU_BENDIAN) + if (justDx && !doFilter) { + #if 0 /* crashing on android device */ + fSampleProc16 = SI8_D16_nofilter_DX_arm; + fShaderProc16 = NULL; + #endif + if (isOpaque) { + // this one is only very slighty faster than the C version + fSampleProc32 = SI8_opaque_D32_nofilter_DX_arm; +diff --git a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +--- a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp ++++ b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +@@ -669,18 +669,23 @@ static void __attribute((noinline,optimi + /* Double Loop */ + "1: \n\t" /* */ + "ldm %[src]!, {r5, r6} \n\t" /* loading src pointers into r5 and r6 */ + "ldm %[dst], {r7, r8} \n\t" /* loading dst pointers into r7 and r8 */ + + /* dst1_scale and dst2_scale*/ + "lsr r9, r5, #24 \n\t" /* src >> 24 */ + "lsr r10, r6, #24 \n\t" /* src >> 24 */ ++#ifdef SK_ARM_HAS_EDSP + "smulbb r9, r9, %[alpha] \n\t" /* r9 = SkMulS16 r9 with src_scale */ + "smulbb r10, r10, %[alpha] \n\t" /* r10 = SkMulS16 r10 with src_scale */ ++#else ++ "mul r9, r9, %[alpha] \n\t" /* r9 = SkMulS16 r9 with src_scale */ ++ "mul r10, r10, %[alpha] \n\t" /* r10 = SkMulS16 r10 with src_scale */ ++#endif + "lsr r9, r9, #8 \n\t" /* r9 >> 8 */ + "lsr r10, r10, #8 \n\t" /* r10 >> 8 */ + "rsb r9, r9, #256 \n\t" /* dst1_scale = r9 = 255 - r9 + 1 */ + "rsb r10, r10, #256 \n\t" /* dst2_scale = r10 = 255 - r10 + 1 */ + + /* ---------------------- */ + + /* src1, src1_scale */ +@@ -739,17 +744,21 @@ static void __attribute((noinline,optimi + /* else get into the single loop */ + /* Single Loop */ + "2: \n\t" /* */ + "ldr r5, [%[src]], #4 \n\t" /* loading src pointer into r5: r5=src */ + "ldr r7, [%[dst]] \n\t" /* loading dst pointer into r7: r7=dst */ + + "lsr r6, r5, #24 \n\t" /* src >> 24 */ + "and r8, r12, r5, lsr #8 \n\t" /* ag = r8 = r5 masked by r12 lsr by #8 */ ++#ifdef SK_ARM_HAS_EDSP + "smulbb r6, r6, %[alpha] \n\t" /* r6 = SkMulS16 with src_scale */ ++#else ++ "mul r6, r6, %[alpha] \n\t" /* r6 = SkMulS16 with src_scale */ ++#endif + "and r9, r12, r5 \n\t" /* rb = r9 = r5 masked by r12 */ + "lsr r6, r6, #8 \n\t" /* r6 >> 8 */ + "mul r8, r8, %[alpha] \n\t" /* ag = r8 times scale */ + "rsb r6, r6, #256 \n\t" /* r6 = 255 - r6 + 1 */ + + /* src, src_scale */ + "mul r9, r9, %[alpha] \n\t" /* rb = r9 times scale */ + "and r8, r8, r12, lsl #8 \n\t" /* ag masked by reverse mask (r12) */ diff --git a/gfx/skia/patches/archive/arm-opts.patch b/gfx/skia/patches/archive/arm-opts.patch new file mode 100644 index 0000000000..02ad85c9a7 --- /dev/null +++ b/gfx/skia/patches/archive/arm-opts.patch @@ -0,0 +1,41 @@ +diff --git a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +--- a/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp ++++ b/gfx/skia/src/opts/SkBlitRow_opts_arm.cpp +@@ -549,17 +549,17 @@ static void S32A_Opaque_BlitRow32_neon(S + #define S32A_Opaque_BlitRow32_PROC S32A_Opaque_BlitRow32_neon + + #else + + #ifdef TEST_SRC_ALPHA + #error The ARM asm version of S32A_Opaque_BlitRow32 does not support TEST_SRC_ALPHA + #endif + +-static void S32A_Opaque_BlitRow32_arm(SkPMColor* SK_RESTRICT dst, ++static void __attribute((noinline,optimize("-fomit-frame-pointer"))) S32A_Opaque_BlitRow32_arm(SkPMColor* SK_RESTRICT dst, + const SkPMColor* SK_RESTRICT src, + int count, U8CPU alpha) { + + SkASSERT(255 == alpha); + + /* Does not support the TEST_SRC_ALPHA case */ + asm volatile ( + "cmp %[count], #0 \n\t" /* comparing count with 0 */ +@@ -646,17 +646,17 @@ static void S32A_Opaque_BlitRow32_arm(Sk + ); + } + #define S32A_Opaque_BlitRow32_PROC S32A_Opaque_BlitRow32_arm + #endif + + /* + * ARM asm version of S32A_Blend_BlitRow32 + */ +-static void S32A_Blend_BlitRow32_arm(SkPMColor* SK_RESTRICT dst, ++static void __attribute((noinline,optimize("-fomit-frame-pointer"))) S32A_Blend_BlitRow32_arm(SkPMColor* SK_RESTRICT dst, + const SkPMColor* SK_RESTRICT src, + int count, U8CPU alpha) { + asm volatile ( + "cmp %[count], #0 \n\t" /* comparing count with 0 */ + "beq 3f \n\t" /* if zero exit */ + + "mov r12, #0xff \n\t" /* load the 0xff mask in r12 */ + "orr r12, r12, r12, lsl #16 \n\t" /* convert it to 0xff00ff in r12 */ diff --git a/gfx/skia/patches/archive/fix-comma-end-enum-list.patch b/gfx/skia/patches/archive/fix-comma-end-enum-list.patch new file mode 100644 index 0000000000..dea36377e8 --- /dev/null +++ b/gfx/skia/patches/archive/fix-comma-end-enum-list.patch @@ -0,0 +1,380 @@ +diff --git a/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h b/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h +--- a/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h ++++ b/gfx/skia/include/core/SkAdvancedTypefaceMetrics.h +@@ -29,17 +29,17 @@ public: + SkString fFontName; + + enum FontType { + kType1_Font, + kType1CID_Font, + kCFF_Font, + kTrueType_Font, + kOther_Font, +- kNotEmbeddable_Font, ++ kNotEmbeddable_Font + }; + // The type of the underlying font program. This field determines which + // of the following fields are valid. If it is kOther_Font or + // kNotEmbeddable_Font, the per glyph information will never be populated. + FontType fType; + + // fMultiMaster may be true for Type1_Font or CFF_Font. + bool fMultiMaster; +@@ -51,17 +51,17 @@ public: + kFixedPitch_Style = 0x00001, + kSerif_Style = 0x00002, + kSymbolic_Style = 0x00004, + kScript_Style = 0x00008, + kNonsymbolic_Style = 0x00020, + kItalic_Style = 0x00040, + kAllCaps_Style = 0x10000, + kSmallCaps_Style = 0x20000, +- kForceBold_Style = 0x40000, ++ kForceBold_Style = 0x40000 + }; + uint16_t fStyle; // Font style characteristics. + int16_t fItalicAngle; // Counterclockwise degrees from vertical of the + // dominant vertical stroke for an Italic face. + // The following fields are all in font units. + int16_t fAscent; // Max height above baseline, not including accents. + int16_t fDescent; // Max depth below baseline (negative). + int16_t fStemV; // Thickness of dominant vertical stem. +@@ -70,26 +70,26 @@ public: + SkIRect fBBox; // The bounding box of all glyphs (in font units). + + // The type of advance data wanted. + enum PerGlyphInfo { + kNo_PerGlyphInfo = 0x0, // Don't populate any per glyph info. + kHAdvance_PerGlyphInfo = 0x1, // Populate horizontal advance data. + kVAdvance_PerGlyphInfo = 0x2, // Populate vertical advance data. + kGlyphNames_PerGlyphInfo = 0x4, // Populate glyph names (Type 1 only). +- kToUnicode_PerGlyphInfo = 0x8, // Populate ToUnicode table, ignored ++ kToUnicode_PerGlyphInfo = 0x8 // Populate ToUnicode table, ignored + // for Type 1 fonts + }; + + template + struct AdvanceMetric { + enum MetricType { + kDefault, // Default advance: fAdvance.count = 1 + kRange, // Advances for a range: fAdvance.count = fEndID-fStartID +- kRun, // fStartID-fEndID have same advance: fAdvance.count = 1 ++ kRun // fStartID-fEndID have same advance: fAdvance.count = 1 + }; + MetricType fType; + uint16_t fStartId; + uint16_t fEndId; + SkTDArray fAdvance; + SkTScopedPtr > fNext; + }; + +diff --git a/gfx/skia/include/core/SkBlitRow.h b/gfx/skia/include/core/SkBlitRow.h +--- a/gfx/skia/include/core/SkBlitRow.h ++++ b/gfx/skia/include/core/SkBlitRow.h +@@ -44,17 +44,17 @@ public: + + //! Public entry-point to return a blit function ptr + static Proc Factory(unsigned flags, SkBitmap::Config); + + ///////////// D32 version + + enum Flags32 { + kGlobalAlpha_Flag32 = 1 << 0, +- kSrcPixelAlpha_Flag32 = 1 << 1, ++ kSrcPixelAlpha_Flag32 = 1 << 1 + }; + + /** Function pointer that blends 32bit colors onto a 32bit destination. + @param dst array of dst 32bit colors + @param src array of src 32bit colors (w/ or w/o alpha) + @param count number of colors to blend + @param alpha global alpha to be applied to all src colors + */ +diff --git a/gfx/skia/include/core/SkCanvas.h b/gfx/skia/include/core/SkCanvas.h +--- a/gfx/skia/include/core/SkCanvas.h ++++ b/gfx/skia/include/core/SkCanvas.h +@@ -132,17 +132,17 @@ public: + * low byte to high byte: B, G, R, A. + */ + kBGRA_Premul_Config8888, + kBGRA_Unpremul_Config8888, + /** + * low byte to high byte: R, G, B, A. + */ + kRGBA_Premul_Config8888, +- kRGBA_Unpremul_Config8888, ++ kRGBA_Unpremul_Config8888 + }; + + /** + * On success (returns true), copy the canvas pixels into the bitmap. + * On failure, the bitmap parameter is left unchanged and false is + * returned. + * + * The canvas' pixels are converted to the bitmap's config. The only +diff --git a/gfx/skia/include/core/SkDevice.h b/gfx/skia/include/core/SkDevice.h +--- a/gfx/skia/include/core/SkDevice.h ++++ b/gfx/skia/include/core/SkDevice.h +@@ -134,17 +134,17 @@ public: + * Return the device's origin: its offset in device coordinates from + * the default origin in its canvas' matrix/clip + */ + const SkIPoint& getOrigin() const { return fOrigin; } + + protected: + enum Usage { + kGeneral_Usage, +- kSaveLayer_Usage, // + */ + enum Hinting { + kNo_Hinting = 0, + kSlight_Hinting = 1, + kNormal_Hinting = 2, //!< this is the default +- kFull_Hinting = 3, ++ kFull_Hinting = 3 + }; + + Hinting getHinting() const { + return static_cast(fHinting); + } + + void setHinting(Hinting hintingLevel); + +@@ -282,17 +282,17 @@ public: + results may not appear the same as if it was drawn twice, filled and + then stroked. + */ + enum Style { + kFill_Style, //!< fill the geometry + kStroke_Style, //!< stroke the geometry + kStrokeAndFill_Style, //!< fill and stroke the geometry + +- kStyleCount, ++ kStyleCount + }; + + /** Return the paint's style, used for controlling how primitives' + geometries are interpreted (except for drawBitmap, which always assumes + kFill_Style). + @return the paint's Style + */ + Style getStyle() const { return (Style)fStyle; } +diff --git a/gfx/skia/include/core/SkScalerContext.h b/gfx/skia/include/core/SkScalerContext.h +--- a/gfx/skia/include/core/SkScalerContext.h ++++ b/gfx/skia/include/core/SkScalerContext.h +@@ -172,24 +172,24 @@ public: + kHintingBit2_Flag = 0x0100, + + // these should only ever be set if fMaskFormat is LCD16 or LCD32 + kLCD_Vertical_Flag = 0x0200, // else Horizontal + kLCD_BGROrder_Flag = 0x0400, // else RGB order + + // luminance : 0 for black text, kLuminance_Max for white text + kLuminance_Shift = 11, // to shift into the other flags above +- kLuminance_Bits = 3, // ensure Flags doesn't exceed 16bits ++ kLuminance_Bits = 3 // ensure Flags doesn't exceed 16bits + }; + + // computed values + enum { + kHinting_Mask = kHintingBit1_Flag | kHintingBit2_Flag, + kLuminance_Max = (1 << kLuminance_Bits) - 1, +- kLuminance_Mask = kLuminance_Max << kLuminance_Shift, ++ kLuminance_Mask = kLuminance_Max << kLuminance_Shift + }; + + struct Rec { + uint32_t fOrigFontID; + uint32_t fFontID; + SkScalar fTextSize, fPreScaleX, fPreSkewX; + SkScalar fPost2x2[2][2]; + SkScalar fFrameWidth, fMiterLimit; +diff --git a/gfx/skia/include/core/SkTypes.h b/gfx/skia/include/core/SkTypes.h +--- a/gfx/skia/include/core/SkTypes.h ++++ b/gfx/skia/include/core/SkTypes.h +@@ -433,17 +433,17 @@ public: + */ + kAlloc_OnShrink, + + /** + * If the requested size is smaller than the current size, and the + * current block is dynamically allocated, just return the old + * block. + */ +- kReuse_OnShrink, ++ kReuse_OnShrink + }; + + /** + * Reallocates the block to a new size. The ptr may or may not change. + */ + void* reset(size_t size, OnShrink shrink = kAlloc_OnShrink) { + if (size == fSize || (kReuse_OnShrink == shrink && size < fSize)) { + return fPtr; +diff --git a/gfx/skia/include/effects/SkLayerDrawLooper.h b/gfx/skia/include/effects/SkLayerDrawLooper.h +--- a/gfx/skia/include/effects/SkLayerDrawLooper.h ++++ b/gfx/skia/include/effects/SkLayerDrawLooper.h +@@ -36,17 +36,17 @@ public: + + /** + * Use the layer's paint entirely, with these exceptions: + * - We never override the draw's paint's text_encoding, since that is + * used to interpret the text/len parameters in draw[Pos]Text. + * - Flags and Color are always computed using the LayerInfo's + * fFlagsMask and fColorMode. + */ +- kEntirePaint_Bits = -1, ++ kEntirePaint_Bits = -1 + + }; + typedef int32_t BitFlags; + + /** + * Info for how to apply the layer's paint and offset. + * + * fFlagsMask selects which flags in the layer's paint should be applied. +diff --git a/gfx/skia/src/core/SkBitmap.cpp b/gfx/skia/src/core/SkBitmap.cpp +--- a/gfx/skia/src/core/SkBitmap.cpp ++++ b/gfx/skia/src/core/SkBitmap.cpp +@@ -1357,17 +1357,17 @@ bool SkBitmap::extractAlpha(SkBitmap* ds + + /////////////////////////////////////////////////////////////////////////////// + + enum { + SERIALIZE_PIXELTYPE_NONE, + SERIALIZE_PIXELTYPE_RAW_WITH_CTABLE, + SERIALIZE_PIXELTYPE_RAW_NO_CTABLE, + SERIALIZE_PIXELTYPE_REF_DATA, +- SERIALIZE_PIXELTYPE_REF_PTR, ++ SERIALIZE_PIXELTYPE_REF_PTR + }; + + static void writeString(SkFlattenableWriteBuffer& buffer, const char str[]) { + size_t len = strlen(str); + buffer.write32(len); + buffer.writePad(str, len); + } + +diff --git a/gfx/skia/src/core/SkMatrix.cpp b/gfx/skia/src/core/SkMatrix.cpp +--- a/gfx/skia/src/core/SkMatrix.cpp ++++ b/gfx/skia/src/core/SkMatrix.cpp +@@ -1715,17 +1715,17 @@ SkScalar SkMatrix::getMaxStretch() const + const SkMatrix& SkMatrix::I() { + static SkMatrix gIdentity; + static bool gOnce; + if (!gOnce) { + gIdentity.reset(); + gOnce = true; + } + return gIdentity; +-}; ++} + + const SkMatrix& SkMatrix::InvalidMatrix() { + static SkMatrix gInvalid; + static bool gOnce; + if (!gOnce) { + gInvalid.setAll(SK_ScalarMax, SK_ScalarMax, SK_ScalarMax, + SK_ScalarMax, SK_ScalarMax, SK_ScalarMax, + SK_ScalarMax, SK_ScalarMax, SK_ScalarMax); diff --git a/gfx/skia/patches/archive/fix-gradient-clamp.patch b/gfx/skia/patches/archive/fix-gradient-clamp.patch new file mode 100644 index 0000000000..91481c2c12 --- /dev/null +++ b/gfx/skia/patches/archive/fix-gradient-clamp.patch @@ -0,0 +1,211 @@ +diff --git a/gfx/skia/src/effects/SkGradientShader.cpp b/gfx/skia/src/effects/SkGradientShader.cpp +--- a/gfx/skia/src/effects/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/SkGradientShader.cpp +@@ -167,16 +167,17 @@ private: + + mutable uint16_t* fCache16; // working ptr. If this is NULL, we need to recompute the cache values + mutable SkPMColor* fCache32; // working ptr. If this is NULL, we need to recompute the cache values + + mutable uint16_t* fCache16Storage; // storage for fCache16, allocated on demand + mutable SkMallocPixelRef* fCache32PixelRef; + mutable unsigned fCacheAlpha; // the alpha value we used when we computed the cache. larger than 8bits so we can store uninitialized value + ++ static SkPMColor PremultiplyColor(SkColor c0, U8CPU alpha); + static void Build16bitCache(uint16_t[], SkColor c0, SkColor c1, int count); + static void Build32bitCache(SkPMColor[], SkColor c0, SkColor c1, int count, + U8CPU alpha); + void setCacheAlpha(U8CPU alpha) const; + void initCommon(); + + typedef SkShader INHERITED; + }; +@@ -512,16 +513,31 @@ static inline U8CPU dither_fixed_to_8(Sk + * For dithering with premultiply, we want to ceiling the alpha component, + * to ensure that it is always >= any color component. + */ + static inline U8CPU dither_ceil_fixed_to_8(SkFixed n) { + n >>= 8; + return ((n << 1) - (n | (n >> 8))) >> 8; + } + ++SkPMColor Gradient_Shader::PremultiplyColor(SkColor c0, U8CPU paintAlpha) ++{ ++ SkFixed a = SkMulDiv255Round(SkColorGetA(c0), paintAlpha); ++ SkFixed r = SkColorGetR(c0); ++ SkFixed g = SkColorGetG(c0); ++ SkFixed b = SkColorGetB(c0); ++ ++ a = SkIntToFixed(a) + 0x8000; ++ r = SkIntToFixed(r) + 0x8000; ++ g = SkIntToFixed(g) + 0x8000; ++ b = SkIntToFixed(b) + 0x8000; ++ ++ return SkPremultiplyARGBInline(a >> 16, r >> 16, g >> 16, b >> 16); ++} ++ + void Gradient_Shader::Build32bitCache(SkPMColor cache[], SkColor c0, SkColor c1, + int count, U8CPU paintAlpha) { + SkASSERT(count > 1); + + // need to apply paintAlpha to our two endpoints + SkFixed a = SkMulDiv255Round(SkColorGetA(c0), paintAlpha); + SkFixed da; + { +@@ -613,24 +629,24 @@ const uint16_t* Gradient_Shader::getCach + } + } + return fCache16; + } + + const SkPMColor* Gradient_Shader::getCache32() const { + if (fCache32 == NULL) { + // double the count for dither entries +- const int entryCount = kCache32Count * 2; ++ const int entryCount = kCache32Count * 2 + 2; + const size_t allocSize = sizeof(SkPMColor) * entryCount; + + if (NULL == fCache32PixelRef) { + fCache32PixelRef = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + } +- fCache32 = (SkPMColor*)fCache32PixelRef->getAddr(); ++ fCache32 = (SkPMColor*)fCache32PixelRef->getAddr() + 1; + if (fColorCount == 2) { + Build32bitCache(fCache32, fOrigColors[0], fOrigColors[1], + kCache32Count, fCacheAlpha); + } else { + Rec* rec = fRecs; + int prevIndex = 0; + for (int i = 1; i < fColorCount; i++) { + int nextIndex = SkFixedToFFFF(rec[i].fPos) >> (16 - kCache32Bits); +@@ -644,28 +660,31 @@ const SkPMColor* Gradient_Shader::getCac + } + SkASSERT(prevIndex == kCache32Count - 1); + } + + if (fMapper) { + SkMallocPixelRef* newPR = SkNEW_ARGS(SkMallocPixelRef, + (NULL, allocSize, NULL)); + SkPMColor* linear = fCache32; // just computed linear data +- SkPMColor* mapped = (SkPMColor*)newPR->getAddr(); // storage for mapped data ++ SkPMColor* mapped = (SkPMColor*)newPR->getAddr() + 1; // storage for mapped data + SkUnitMapper* map = fMapper; + for (int i = 0; i < kCache32Count; i++) { + int index = map->mapUnit16((i << 8) | i) >> 8; + mapped[i] = linear[index]; + mapped[i + kCache32Count] = linear[index + kCache32Count]; + } + fCache32PixelRef->unref(); + fCache32PixelRef = newPR; +- fCache32 = (SkPMColor*)newPR->getAddr(); ++ fCache32 = (SkPMColor*)newPR->getAddr() + 1; + } + } ++ //Write the clamp colours into the first and last entries of fCache32 ++ fCache32[-1] = PremultiplyColor(fOrigColors[0], fCacheAlpha); ++ fCache32[kCache32Count * 2] = PremultiplyColor(fOrigColors[fColorCount - 1], fCacheAlpha); + return fCache32; + } + + /* + * Because our caller might rebuild the same (logically the same) gradient + * over and over, we'd like to return exactly the same "bitmap" if possible, + * allowing the client to utilize a cache of our bitmap (e.g. with a GPU). + * To do that, we maintain a private cache of built-bitmaps, based on our +@@ -875,28 +894,38 @@ void Linear_Gradient::shadeSpan(int x, i + dx = dxStorage[0]; + } else { + SkASSERT(fDstToIndexClass == kLinear_MatrixClass); + dx = SkScalarToFixed(fDstToIndex.getScaleX()); + } + + if (SkFixedNearlyZero(dx)) { + // we're a vertical gradient, so no change in a span +- unsigned fi = proc(fx) >> (16 - kCache32Bits); +- sk_memset32_dither(dstC, cache[toggle + fi], +- cache[(toggle ^ TOGGLE_MASK) + fi], count); ++ if (proc == clamp_tileproc) { ++ if (fx < 0) { ++ sk_memset32(dstC, cache[-1], count); ++ } else if (fx > 0xFFFF) { ++ sk_memset32(dstC, cache[kCache32Count * 2], count); ++ } else { ++ unsigned fi = proc(fx) >> (16 - kCache32Bits); ++ sk_memset32_dither(dstC, cache[toggle + fi], ++ cache[(toggle ^ TOGGLE_MASK) + fi], count); ++ } ++ } else { ++ unsigned fi = proc(fx) >> (16 - kCache32Bits); ++ sk_memset32_dither(dstC, cache[toggle + fi], ++ cache[(toggle ^ TOGGLE_MASK) + fi], count); ++ } + } else if (proc == clamp_tileproc) { + SkClampRange range; +- range.init(fx, dx, count, 0, 0xFF); ++ range.init(fx, dx, count, cache[-1], cache[kCache32Count * 2]); + + if ((count = range.fCount0) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV0], +- cache[(toggle ^ TOGGLE_MASK) + range.fV0], +- count); ++ // Do we really want to dither the clamp values? ++ sk_memset32(dstC, range.fV0, count); + dstC += count; + } + if ((count = range.fCount1) > 0) { + int unroll = count >> 3; + fx = range.fFx1; + for (int i = 0; i < unroll; i++) { + NO_CHECK_ITER; NO_CHECK_ITER; + NO_CHECK_ITER; NO_CHECK_ITER; +@@ -905,20 +934,17 @@ void Linear_Gradient::shadeSpan(int x, i + } + if ((count &= 7) > 0) { + do { + NO_CHECK_ITER; + } while (--count != 0); + } + } + if ((count = range.fCount2) > 0) { +- sk_memset32_dither(dstC, +- cache[toggle + range.fV1], +- cache[(toggle ^ TOGGLE_MASK) + range.fV1], +- count); ++ sk_memset32(dstC, range.fV1, count); + } + } else if (proc == mirror_tileproc) { + do { + unsigned fi = mirror_8bits(fx >> 8); + SkASSERT(fi <= 0xFF); + fx += dx; + *dstC++ = cache[toggle + fi]; + toggle ^= TOGGLE_MASK; +@@ -1670,19 +1699,24 @@ public: + } + SkScalar b = (SkScalarMul(fDiff.fX, fx) + + SkScalarMul(fDiff.fY, fy) - fStartRadius) * 2; + SkScalar db = (SkScalarMul(fDiff.fX, dx) + + SkScalarMul(fDiff.fY, dy)) * 2; + if (proc == clamp_tileproc) { + for (; count > 0; --count) { + SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); +- SkFixed index = SkClampMax(t, 0xFFFF); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> (16 - kCache32Bits)]; ++ if (t < 0) { ++ *dstC++ = cache[-1]; ++ } else if (t > 0xFFFF) { ++ *dstC++ = cache[kCache32Count * 2]; ++ } else { ++ SkASSERT(t <= 0xFFFF); ++ *dstC++ = cache[t >> (16 - kCache32Bits)]; ++ } + fx += dx; + fy += dy; + b += db; + } + } else if (proc == mirror_tileproc) { + for (; count > 0; --count) { + SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); + SkFixed index = mirror_tileproc(t); diff --git a/gfx/skia/patches/archive/getpostextpath.patch b/gfx/skia/patches/archive/getpostextpath.patch new file mode 100644 index 0000000000..7181411ec8 --- /dev/null +++ b/gfx/skia/patches/archive/getpostextpath.patch @@ -0,0 +1,70 @@ +diff --git a/gfx/skia/include/core/SkPaint.h b/gfx/skia/include/core/SkPaint.h +--- a/gfx/skia/include/core/SkPaint.h ++++ b/gfx/skia/include/core/SkPaint.h +@@ -836,16 +836,19 @@ public: + + /** Return the path (outline) for the specified text. + Note: just like SkCanvas::drawText, this will respect the Align setting + in the paint. + */ + void getTextPath(const void* text, size_t length, SkScalar x, SkScalar y, + SkPath* path) const; + ++ void getPosTextPath(const void* text, size_t length, ++ const SkPoint pos[], SkPath* path) const; ++ + #ifdef SK_BUILD_FOR_ANDROID + const SkGlyph& getUnicharMetrics(SkUnichar); + const void* findImage(const SkGlyph&); + + uint32_t getGenerationID() const; + #endif + + // returns true if the paint's settings (e.g. xfermode + alpha) resolve to +diff --git a/gfx/skia/src/core/SkPaint.cpp b/gfx/skia/src/core/SkPaint.cpp +--- a/gfx/skia/src/core/SkPaint.cpp ++++ b/gfx/skia/src/core/SkPaint.cpp +@@ -1242,16 +1242,43 @@ void SkPaint::getTextPath(const void* te + const SkPath* iterPath; + while ((iterPath = iter.next(&xpos)) != NULL) { + matrix.postTranslate(xpos - prevXPos, 0); + path->addPath(*iterPath, matrix); + prevXPos = xpos; + } + } + ++void SkPaint::getPosTextPath(const void* textData, size_t length, ++ const SkPoint pos[], SkPath* path) const { ++ SkASSERT(length == 0 || textData != NULL); ++ ++ const char* text = (const char*)textData; ++ if (text == NULL || length == 0 || path == NULL) { ++ return; ++ } ++ ++ SkTextToPathIter iter(text, length, *this, false, true); ++ SkMatrix matrix; ++ SkPoint prevPos; ++ prevPos.set(0, 0); ++ ++ matrix.setScale(iter.getPathScale(), iter.getPathScale()); ++ path->reset(); ++ ++ unsigned int i = 0; ++ const SkPath* iterPath; ++ while ((iterPath = iter.next(NULL)) != NULL) { ++ matrix.postTranslate(pos[i].fX - prevPos.fX, pos[i].fY - prevPos.fY); ++ path->addPath(*iterPath, matrix); ++ prevPos = pos[i]; ++ i++; ++ } ++} ++ + static void add_flattenable(SkDescriptor* desc, uint32_t tag, + SkFlattenableWriteBuffer* buffer) { + buffer->flatten(desc->addEntry(tag, buffer->size(), NULL)); + } + + // SkFontHost can override this choice in FilterRec() + static SkMask::Format computeMaskFormat(const SkPaint& paint) { + uint32_t flags = paint.getFlags(); diff --git a/gfx/skia/patches/archive/mingw-fix.patch b/gfx/skia/patches/archive/mingw-fix.patch new file mode 100644 index 0000000000..d91a16aa70 --- /dev/null +++ b/gfx/skia/patches/archive/mingw-fix.patch @@ -0,0 +1,57 @@ +diff --git a/gfx/skia/include/core/SkPostConfig.h b/gfx/skia/include/core/SkPostConfig.h +index 0135b85..bb108f8 100644 +--- a/gfx/skia/include/core/SkPostConfig.h ++++ b/gfx/skia/include/core/SkPostConfig.h +@@ -253,7 +253,7 @@ + ////////////////////////////////////////////////////////////////////// + + #ifndef SK_OVERRIDE +-#if defined(SK_BUILD_FOR_WIN) ++#if defined(_MSC_VER) + #define SK_OVERRIDE override + #elif defined(__clang__) + // Some documentation suggests we should be using __attribute__((override)), +diff --git a/gfx/skia/src/ports/SkFontHost_win.cpp b/gfx/skia/src/ports/SkFontHost_win.cpp +index dd9c5dc..ca2c3dc 100644 +--- a/gfx/skia/src/ports/SkFontHost_win.cpp ++++ b/gfx/skia/src/ports/SkFontHost_win.cpp +@@ -22,7 +22,7 @@ + #ifdef WIN32 + #include "windows.h" + #include "tchar.h" +-#include "Usp10.h" ++#include "usp10.h" + + // always packed xxRRGGBB + typedef uint32_t SkGdiRGB; +@@ -1033,6 +1033,10 @@ SkAdvancedTypefaceMetrics* SkFontHost::GetAdvancedTypefaceMetrics( + HFONT savefont = (HFONT)SelectObject(hdc, font); + HFONT designFont = NULL; + ++ const char stem_chars[] = {'i', 'I', '!', '1'}; ++ int16_t min_width; ++ unsigned glyphCount; ++ + // To request design units, create a logical font whose height is specified + // as unitsPerEm. + OUTLINETEXTMETRIC otm; +@@ -1046,7 +1050,7 @@ SkAdvancedTypefaceMetrics* SkFontHost::GetAdvancedTypefaceMetrics( + if (!GetOutlineTextMetrics(hdc, sizeof(otm), &otm)) { + goto Error; + } +- const unsigned glyphCount = calculateGlyphCount(hdc); ++ glyphCount = calculateGlyphCount(hdc); + + info = new SkAdvancedTypefaceMetrics; + info->fEmSize = otm.otmEMSquare; +@@ -1115,9 +1119,8 @@ SkAdvancedTypefaceMetrics* SkFontHost::GetAdvancedTypefaceMetrics( + + // Figure out a good guess for StemV - Min width of i, I, !, 1. + // This probably isn't very good with an italic font. +- int16_t min_width = SHRT_MAX; ++ min_width = SHRT_MAX; + info->fStemV = 0; +- char stem_chars[] = {'i', 'I', '!', '1'}; + for (size_t i = 0; i < SK_ARRAY_COUNT(stem_chars); i++) { + ABC abcWidths; + if (GetCharABCWidths(hdc, stem_chars[i], stem_chars[i], &abcWidths)) { diff --git a/gfx/skia/patches/archive/new-aa.patch b/gfx/skia/patches/archive/new-aa.patch new file mode 100644 index 0000000000..d5e6fbf73d --- /dev/null +++ b/gfx/skia/patches/archive/new-aa.patch @@ -0,0 +1,22 @@ +diff --git a/gfx/skia/src/core/SkScan_AntiPath.cpp b/gfx/skia/src/core/SkScan_AntiPath.cpp +--- a/gfx/skia/src/core/SkScan_AntiPath.cpp ++++ b/gfx/skia/src/core/SkScan_AntiPath.cpp +@@ -31,17 +31,17 @@ + - supersampled coordinates, scale equal to the output * SCALE + + NEW_AA is a set of code-changes to try to make both paths produce identical + results. Its not quite there yet, though the remaining differences may be + in the subsequent blits, and not in the different masks/runs... + */ + //#define FORCE_SUPERMASK + //#define FORCE_RLE +-//#define SK_SUPPORT_NEW_AA ++#define SK_SUPPORT_NEW_AA + + /////////////////////////////////////////////////////////////////////////////// + + /// Base class for a single-pass supersampled blitter. + class BaseSuperBlitter : public SkBlitter { + public: + BaseSuperBlitter(SkBlitter* realBlitter, const SkIRect& ir, + const SkRegion& clip); diff --git a/gfx/skia/patches/archive/old-android-fonthost.patch b/gfx/skia/patches/archive/old-android-fonthost.patch new file mode 100644 index 0000000000..1c64ace7dd --- /dev/null +++ b/gfx/skia/patches/archive/old-android-fonthost.patch @@ -0,0 +1,530 @@ +# HG changeset patch +# Parent 9ee29e4aace683ddf6cf8ddb2893cd34fcfc772c +# User James Willcox +diff --git a/gfx/skia/Makefile.in b/gfx/skia/Makefile.in +--- a/gfx/skia/Makefile.in ++++ b/gfx/skia/Makefile.in +@@ -305,21 +305,20 @@ CPPSRCS += \ + SkFontHost_mac_coretext.cpp \ + SkTime_Unix.cpp \ + $(NULL) + endif + + ifeq (android,$(MOZ_WIDGET_TOOLKIT)) + CPPSRCS += \ + SkFontHost_FreeType.cpp \ + SkFontHost_android.cpp \ + SkFontHost_gamma.cpp \ +- FontHostConfiguration_android.cpp \ + SkMMapStream.cpp \ + SkTime_Unix.cpp \ + $(NULL) + + DEFINES += -DSK_BUILD_FOR_ANDROID_NDK + OS_CXXFLAGS += $(CAIRO_FT_CFLAGS) + endif + + ifeq (gtk2,$(MOZ_WIDGET_TOOLKIT)) + CPPSRCS += \ +diff --git a/gfx/skia/src/ports/SkFontHost_android.cpp b/gfx/skia/src/ports/SkFontHost_android.cpp +--- a/gfx/skia/src/ports/SkFontHost_android.cpp ++++ b/gfx/skia/src/ports/SkFontHost_android.cpp +@@ -1,38 +1,31 @@ ++ + /* +-** +-** Copyright 2006, The Android Open Source Project +-** +-** Licensed under the Apache License, Version 2.0 (the "License"); +-** you may not use this file except in compliance with the License. +-** You may obtain a copy of the License at +-** +-** http://www.apache.org/licenses/LICENSE-2.0 +-** +-** Unless required by applicable law or agreed to in writing, software +-** distributed under the License is distributed on an "AS IS" BASIS, +-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +-** See the License for the specific language governing permissions and +-** limitations under the License. +-*/ ++ * Copyright 2006 The Android Open Source Project ++ * ++ * Use of this source code is governed by a BSD-style license that can be ++ * found in the LICENSE file. ++ */ ++ + + #include "SkFontHost.h" + #include "SkDescriptor.h" + #include "SkMMapStream.h" + #include "SkPaint.h" + #include "SkString.h" + #include "SkStream.h" + #include "SkThread.h" + #include "SkTSearch.h" +-#include "FontHostConfiguration_android.h" + #include + ++#define FONT_CACHE_MEMORY_BUDGET (768 * 1024) ++ + #ifndef SK_FONT_FILE_PREFIX + #define SK_FONT_FILE_PREFIX "/fonts/" + #endif + + SkTypeface::Style find_name_and_attributes(SkStream* stream, SkString* name, + bool* isFixedWidth); + + static void GetFullPathForSysFonts(SkString* full, const char name[]) { + full->set(getenv("ANDROID_ROOT")); + full->append(SK_FONT_FILE_PREFIX); +@@ -99,21 +92,21 @@ static SkTypeface* find_best_face(const + if (faces[SkTypeface::kNormal] != NULL) { + return faces[SkTypeface::kNormal]; + } + // look for anything + for (int i = 0; i < 4; i++) { + if (faces[i] != NULL) { + return faces[i]; + } + } + // should never get here, since the faces list should not be empty +- SkDEBUGFAIL("faces list is empty"); ++ SkASSERT(!"faces list is empty"); + return NULL; + } + + static FamilyRec* find_family(const SkTypeface* member) { + FamilyRec* curr = gFamilyHead; + while (curr != NULL) { + for (int i = 0; i < 4; i++) { + if (curr->fFaces[i] == member) { + return curr; + } +@@ -138,31 +131,27 @@ static SkTypeface* find_from_uniqueID(ui + curr = curr->fNext; + } + return NULL; + } + + /* Remove reference to this face from its family. If the resulting family + is empty (has no faces), return that family, otherwise return NULL + */ + static FamilyRec* remove_from_family(const SkTypeface* face) { + FamilyRec* family = find_family(face); +- if (family) { +- SkASSERT(family->fFaces[face->style()] == face); +- family->fFaces[face->style()] = NULL; ++ SkASSERT(family->fFaces[face->style()] == face); ++ family->fFaces[face->style()] = NULL; + +- for (int i = 0; i < 4; i++) { +- if (family->fFaces[i] != NULL) { // family is non-empty +- return NULL; +- } ++ for (int i = 0; i < 4; i++) { ++ if (family->fFaces[i] != NULL) { // family is non-empty ++ return NULL; + } +- } else { +-// SkDebugf("remove_from_family(%p) face not found", face); + } + return family; // return the empty family + } + + // maybe we should make FamilyRec be doubly-linked + static void detach_and_delete_family(FamilyRec* family) { + FamilyRec* curr = gFamilyHead; + FamilyRec* prev = NULL; + + while (curr != NULL) { +@@ -172,21 +161,21 @@ static void detach_and_delete_family(Fam + gFamilyHead = next; + } else { + prev->fNext = next; + } + SkDELETE(family); + return; + } + prev = curr; + curr = next; + } +- SkDEBUGFAIL("Yikes, couldn't find family in our list to remove/delete"); ++ SkASSERT(!"Yikes, couldn't find family in our list to remove/delete"); + } + + static SkTypeface* find_typeface(const char name[], SkTypeface::Style style) { + NameFamilyPair* list = gNameList.begin(); + int count = gNameList.count(); + + int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0])); + + if (index >= 0) { + return find_best_face(list[index].fFamily, style); +@@ -387,111 +376,90 @@ static bool get_name_and_style(const cha + } + return false; + } + + // used to record our notion of the pre-existing fonts + struct FontInitRec { + const char* fFileName; + const char* const* fNames; // null-terminated list + }; + ++static const char* gSansNames[] = { ++ "sans-serif", "arial", "helvetica", "tahoma", "verdana", NULL ++}; ++ ++static const char* gSerifNames[] = { ++ "serif", "times", "times new roman", "palatino", "georgia", "baskerville", ++ "goudy", "fantasy", "cursive", "ITC Stone Serif", NULL ++}; ++ ++static const char* gMonoNames[] = { ++ "monospace", "courier", "courier new", "monaco", NULL ++}; ++ + // deliberately empty, but we use the address to identify fallback fonts + static const char* gFBNames[] = { NULL }; + ++/* Fonts must be grouped by family, with the first font in a family having the ++ list of names (even if that list is empty), and the following members having ++ null for the list. The names list must be NULL-terminated ++*/ ++static const FontInitRec gSystemFonts[] = { ++ { "DroidSans.ttf", gSansNames }, ++ { "DroidSans-Bold.ttf", NULL }, ++ { "DroidSerif-Regular.ttf", gSerifNames }, ++ { "DroidSerif-Bold.ttf", NULL }, ++ { "DroidSerif-Italic.ttf", NULL }, ++ { "DroidSerif-BoldItalic.ttf", NULL }, ++ { "DroidSansMono.ttf", gMonoNames }, ++ /* These are optional, and can be ignored if not found in the file system. ++ These are appended to gFallbackFonts[] as they are seen, so we list ++ them in the order we want them to be accessed by NextLogicalFont(). ++ */ ++ { "DroidSansArabic.ttf", gFBNames }, ++ { "DroidSansHebrew.ttf", gFBNames }, ++ { "DroidSansThai.ttf", gFBNames }, ++ { "MTLmr3m.ttf", gFBNames }, // Motoya Japanese Font ++ { "MTLc3m.ttf", gFBNames }, // Motoya Japanese Font ++ { "DroidSansJapanese.ttf", gFBNames }, ++ { "DroidSansFallback.ttf", gFBNames } ++}; + +-/* Fonts are grouped by family, with the first font in a family having the +- list of names (even if that list is empty), and the following members having +- null for the list. The names list must be NULL-terminated. +-*/ +-static FontInitRec *gSystemFonts; +-static size_t gNumSystemFonts = 0; +- +-#define SYSTEM_FONTS_FILE "/system/etc/system_fonts.cfg" ++#define DEFAULT_NAMES gSansNames + + // these globals are assigned (once) by load_system_fonts() + static FamilyRec* gDefaultFamily; + static SkTypeface* gDefaultNormal; +-static char** gDefaultNames = NULL; +-static uint32_t *gFallbackFonts; + +-/* Load info from a configuration file that populates the system/fallback font structures +-*/ +-static void load_font_info() { +-// load_font_info_xml("/system/etc/system_fonts.xml"); +- SkTDArray fontFamilies; +- getFontFamilies(fontFamilies); +- +- SkTDArray fontInfo; +- bool firstInFamily = false; +- for (int i = 0; i < fontFamilies.count(); ++i) { +- FontFamily *family = fontFamilies[i]; +- firstInFamily = true; +- for (int j = 0; j < family->fFileNames.count(); ++j) { +- FontInitRec fontInfoRecord; +- fontInfoRecord.fFileName = family->fFileNames[j]; +- if (j == 0) { +- if (family->fNames.count() == 0) { +- // Fallback font +- fontInfoRecord.fNames = (char **)gFBNames; +- } else { +- SkTDArray names = family->fNames; +- const char **nameList = (const char**) +- malloc((names.count() + 1) * sizeof(char*)); +- if (nameList == NULL) { +- // shouldn't get here +- break; +- } +- if (gDefaultNames == NULL) { +- gDefaultNames = (char**) nameList; +- } +- for (int i = 0; i < names.count(); ++i) { +- nameList[i] = names[i]; +- } +- nameList[names.count()] = NULL; +- fontInfoRecord.fNames = nameList; +- } +- } else { +- fontInfoRecord.fNames = NULL; +- } +- *fontInfo.append() = fontInfoRecord; +- } +- } +- gNumSystemFonts = fontInfo.count(); +- gSystemFonts = (FontInitRec*) malloc(gNumSystemFonts * sizeof(FontInitRec)); +- gFallbackFonts = (uint32_t*) malloc((gNumSystemFonts + 1) * sizeof(uint32_t)); +- if (gSystemFonts == NULL) { +- // shouldn't get here +- gNumSystemFonts = 0; +- } +- for (size_t i = 0; i < gNumSystemFonts; ++i) { +- gSystemFonts[i].fFileName = fontInfo[i].fFileName; +- gSystemFonts[i].fNames = fontInfo[i].fNames; +- } +- fontFamilies.deleteAll(); +-} ++/* This is sized conservatively, assuming that it will never be a size issue. ++ It will be initialized in load_system_fonts(), and will be filled with the ++ fontIDs that can be used for fallback consideration, in sorted order (sorted ++ meaning element[0] should be used first, then element[1], etc. When we hit ++ a fontID==0 in the array, the list is done, hence our allocation size is ++ +1 the total number of possible system fonts. Also see NextLogicalFont(). ++ */ ++static uint32_t gFallbackFonts[SK_ARRAY_COUNT(gSystemFonts)+1]; + + /* Called once (ensured by the sentinel check at the beginning of our body). + Initializes all the globals, and register the system fonts. + */ + static void load_system_fonts() { + // check if we've already be called + if (NULL != gDefaultNormal) { + return; + } + +- load_font_info(); +- + const FontInitRec* rec = gSystemFonts; + SkTypeface* firstInFamily = NULL; + int fallbackCount = 0; + +- for (size_t i = 0; i < gNumSystemFonts; i++) { ++ for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { + // if we're the first in a new family, clear firstInFamily + if (rec[i].fNames != NULL) { + firstInFamily = NULL; + } + + bool isFixedWidth; + SkString name; + SkTypeface::Style style; + + // we expect all the fonts, except the "fallback" fonts +@@ -515,120 +483,75 @@ static void load_system_fonts() { + // SkDebugf("---- adding %s as fallback[%d] fontID %d\n", + // rec[i].fFileName, fallbackCount, tf->uniqueID()); + gFallbackFonts[fallbackCount++] = tf->uniqueID(); + } + + firstInFamily = tf; + FamilyRec* family = find_family(tf); + const char* const* names = rec[i].fNames; + + // record the default family if this is it +- if (names == gDefaultNames) { ++ if (names == DEFAULT_NAMES) { + gDefaultFamily = family; + } + // add the names to map to this family + while (*names) { + add_name(*names, family); + names += 1; + } + } + } + + // do this after all fonts are loaded. This is our default font, and it + // acts as a sentinel so we only execute load_system_fonts() once + gDefaultNormal = find_best_face(gDefaultFamily, SkTypeface::kNormal); + // now terminate our fallback list with the sentinel value + gFallbackFonts[fallbackCount] = 0; + } + + /////////////////////////////////////////////////////////////////////////////// + + void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) { +- // lookup and record if the font is custom (i.e. not a system font) +- bool isCustomFont = !((FamilyTypeface*)face)->isSysFont(); +- stream->writeBool(isCustomFont); ++ const char* name = ((FamilyTypeface*)face)->getUniqueString(); + +- if (isCustomFont) { +- SkStream* fontStream = ((FamilyTypeface*)face)->openStream(); ++ stream->write8((uint8_t)face->style()); + +- // store the length of the custom font +- uint32_t len = fontStream->getLength(); +- stream->write32(len); +- +- // store the entire font in the serialized stream +- void* fontData = malloc(len); +- +- fontStream->read(fontData, len); +- stream->write(fontData, len); +- +- fontStream->unref(); +- free(fontData); +-// SkDebugf("--- fonthost custom serialize %d %d\n", face->style(), len); +- ++ if (NULL == name || 0 == *name) { ++ stream->writePackedUInt(0); ++// SkDebugf("--- fonthost serialize null\n"); + } else { +- const char* name = ((FamilyTypeface*)face)->getUniqueString(); +- +- stream->write8((uint8_t)face->style()); +- +- if (NULL == name || 0 == *name) { +- stream->writePackedUInt(0); +-// SkDebugf("--- fonthost serialize null\n"); +- } else { +- uint32_t len = strlen(name); +- stream->writePackedUInt(len); +- stream->write(name, len); +-// SkDebugf("--- fonthost serialize <%s> %d\n", name, face->style()); +- } ++ uint32_t len = strlen(name); ++ stream->writePackedUInt(len); ++ stream->write(name, len); ++// SkDebugf("--- fonthost serialize <%s> %d\n", name, face->style()); + } + } + + SkTypeface* SkFontHost::Deserialize(SkStream* stream) { + load_system_fonts(); + +- // check if the font is a custom or system font +- bool isCustomFont = stream->readBool(); ++ int style = stream->readU8(); + +- if (isCustomFont) { ++ int len = stream->readPackedUInt(); ++ if (len > 0) { ++ SkString str; ++ str.resize(len); ++ stream->read(str.writable_str(), len); + +- // read the length of the custom font from the stream +- uint32_t len = stream->readU32(); +- +- // generate a new stream to store the custom typeface +- SkMemoryStream* fontStream = new SkMemoryStream(len); +- stream->read((void*)fontStream->getMemoryBase(), len); +- +- SkTypeface* face = CreateTypefaceFromStream(fontStream); +- +- fontStream->unref(); +- +-// SkDebugf("--- fonthost custom deserialize %d %d\n", face->style(), len); +- return face; +- +- } else { +- int style = stream->readU8(); +- +- int len = stream->readPackedUInt(); +- if (len > 0) { +- SkString str; +- str.resize(len); +- stream->read(str.writable_str(), len); +- +- const FontInitRec* rec = gSystemFonts; +- for (size_t i = 0; i < gNumSystemFonts; i++) { +- if (strcmp(rec[i].fFileName, str.c_str()) == 0) { +- // backup until we hit the fNames +- for (int j = i; j >= 0; --j) { +- if (rec[j].fNames != NULL) { +- return SkFontHost::CreateTypeface(NULL, +- rec[j].fNames[0], NULL, 0, +- (SkTypeface::Style)style); +- } ++ const FontInitRec* rec = gSystemFonts; ++ for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) { ++ if (strcmp(rec[i].fFileName, str.c_str()) == 0) { ++ // backup until we hit the fNames ++ for (int j = i; j >= 0; --j) { ++ if (rec[j].fNames != NULL) { ++ return SkFontHost::CreateTypeface(NULL, ++ rec[j].fNames[0], NULL, 0, (SkTypeface::Style)style); + } + } + } + } + } + return NULL; + } + + /////////////////////////////////////////////////////////////////////////////// + +@@ -697,49 +620,32 @@ size_t SkFontHost::GetFileName(SkFontID + } + return size; + } else { + return 0; + } + } + + SkFontID SkFontHost::NextLogicalFont(SkFontID currFontID, SkFontID origFontID) { + load_system_fonts(); + +- const SkTypeface* origTypeface = find_from_uniqueID(origFontID); +- const SkTypeface* currTypeface = find_from_uniqueID(currFontID); +- +- SkASSERT(origTypeface != 0); +- SkASSERT(currTypeface != 0); +- +- // Our fallback list always stores the id of the plain in each fallback +- // family, so we transform currFontID to its plain equivalent. +- currFontID = find_typeface(currTypeface, SkTypeface::kNormal)->uniqueID(); +- + /* First see if fontID is already one of our fallbacks. If so, return + its successor. If fontID is not in our list, then return the first one + in our list. Note: list is zero-terminated, and returning zero means + we have no more fonts to use for fallbacks. + */ + const uint32_t* list = gFallbackFonts; + for (int i = 0; list[i] != 0; i++) { + if (list[i] == currFontID) { +- if (list[i+1] == 0) +- return 0; +- const SkTypeface* nextTypeface = find_from_uniqueID(list[i+1]); +- return find_typeface(nextTypeface, origTypeface->style())->uniqueID(); ++ return list[i+1]; + } + } +- +- // If we get here, currFontID was not a fallback, so we start at the +- // beginning of our list. +- const SkTypeface* firstTypeface = find_from_uniqueID(list[0]); +- return find_typeface(firstTypeface, origTypeface->style())->uniqueID(); ++ return list[0]; + } + + /////////////////////////////////////////////////////////////////////////////// + + SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) { + if (NULL == stream || stream->getLength() <= 0) { + return NULL; + } + + bool isFixedWidth; +@@ -754,10 +660,11 @@ SkTypeface* SkFontHost::CreateTypefaceFr + } + + SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) { + SkStream* stream = SkNEW_ARGS(SkMMAPStream, (path)); + SkTypeface* face = SkFontHost::CreateTypefaceFromStream(stream); + // since we created the stream, we let go of our ref() here + stream->unref(); + return face; + } + ++/////////////////////////////////////////////////////////////////////////////// diff --git a/gfx/skia/patches/archive/radial-gradients.patch b/gfx/skia/patches/archive/radial-gradients.patch new file mode 100644 index 0000000000..183923e83e --- /dev/null +++ b/gfx/skia/patches/archive/radial-gradients.patch @@ -0,0 +1,25 @@ +diff --git a/gfx/skia/src/effects/SkGradientShader.cpp b/gfx/skia/src/effects/SkGradientShader.cpp +--- a/gfx/skia/src/effects/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/SkGradientShader.cpp +@@ -1665,17 +1665,20 @@ public: + } + return kRadial2_GradientType; + } + + virtual void shadeSpan(int x, int y, SkPMColor* SK_RESTRICT dstC, int count) SK_OVERRIDE { + SkASSERT(count > 0); + + // Zero difference between radii: fill with transparent black. +- if (fDiffRadius == 0) { ++ // TODO: Is removing this actually correct? Two circles with the ++ // same radius, but different centers doesn't sound like it ++ // should be cleared ++ if (fDiffRadius == 0 && fCenter1 == fCenter2) { + sk_bzero(dstC, count * sizeof(*dstC)); + return; + } + SkMatrix::MapXYProc dstProc = fDstToIndexProc; + TileProc proc = fTileProc; + const SkPMColor* SK_RESTRICT cache = this->getCache32(); + + SkScalar foura = fA * 4; diff --git a/gfx/skia/patches/archive/skia_restrict_problem.patch b/gfx/skia/patches/archive/skia_restrict_problem.patch new file mode 100644 index 0000000000..c7639ca2ce --- /dev/null +++ b/gfx/skia/patches/archive/skia_restrict_problem.patch @@ -0,0 +1,461 @@ +diff --git a/gfx/skia/src/effects/SkGradientShader.cpp b/gfx/skia/src/effects/SkGradientShader.cpp +--- a/gfx/skia/src/effects/SkGradientShader.cpp ++++ b/gfx/skia/src/effects/SkGradientShader.cpp +@@ -1184,116 +1184,17 @@ public: + { + // make sure our table is insync with our current #define for kSQRT_TABLE_SIZE + SkASSERT(sizeof(gSqrt8Table) == kSQRT_TABLE_SIZE); + + rad_to_unit_matrix(center, radius, &fPtsToUnit); + } + + virtual void shadeSpan(int x, int y, SkPMColor* dstC, int count) SK_OVERRIDE; +- virtual void shadeSpan16(int x, int y, uint16_t* SK_RESTRICT dstC, int count) SK_OVERRIDE { +- SkASSERT(count > 0); +- +- SkPoint srcPt; +- SkMatrix::MapXYProc dstProc = fDstToIndexProc; +- TileProc proc = fTileProc; +- const uint16_t* SK_RESTRICT cache = this->getCache16(); +- int toggle = ((x ^ y) & 1) << kCache16Bits; +- +- if (fDstToIndexClass != kPerspective_MatrixClass) { +- dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, +- SkIntToScalar(y) + SK_ScalarHalf, &srcPt); +- SkFixed dx, fx = SkScalarToFixed(srcPt.fX); +- SkFixed dy, fy = SkScalarToFixed(srcPt.fY); +- +- if (fDstToIndexClass == kFixedStepInX_MatrixClass) { +- SkFixed storage[2]; +- (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), &storage[0], &storage[1]); +- dx = storage[0]; +- dy = storage[1]; +- } else { +- SkASSERT(fDstToIndexClass == kLinear_MatrixClass); +- dx = SkScalarToFixed(fDstToIndex.getScaleX()); +- dy = SkScalarToFixed(fDstToIndex.getSkewY()); +- } +- +- if (proc == clamp_tileproc) { +- const uint8_t* SK_RESTRICT sqrt_table = gSqrt8Table; +- +- /* knock these down so we can pin against +- 0x7FFF, which is an immediate load, +- rather than 0xFFFF which is slower. This is a compromise, since it reduces our +- precision, but that appears to be visually OK. If we decide this is OK for +- all of our cases, we could (it seems) put this scale-down into fDstToIndex, +- to avoid having to do these extra shifts each time. +- */ +- fx >>= 1; +- dx >>= 1; +- fy >>= 1; +- dy >>= 1; +- if (dy == 0) { // might perform this check for the other modes, but the win will be a smaller % of the total +- fy = SkPin32(fy, -0xFFFF >> 1, 0xFFFF >> 1); +- fy *= fy; +- do { +- unsigned xx = SkPin32(fx, -0xFFFF >> 1, 0xFFFF >> 1); +- unsigned fi = (xx * xx + fy) >> (14 + 16 - kSQRT_TABLE_BITS); +- fi = SkFastMin32(fi, 0xFFFF >> (16 - kSQRT_TABLE_BITS)); +- fx += dx; +- *dstC++ = cache[toggle + (sqrt_table[fi] >> (8 - kCache16Bits))]; +- toggle ^= (1 << kCache16Bits); +- } while (--count != 0); +- } else { +- do { +- unsigned xx = SkPin32(fx, -0xFFFF >> 1, 0xFFFF >> 1); +- unsigned fi = SkPin32(fy, -0xFFFF >> 1, 0xFFFF >> 1); +- fi = (xx * xx + fi * fi) >> (14 + 16 - kSQRT_TABLE_BITS); +- fi = SkFastMin32(fi, 0xFFFF >> (16 - kSQRT_TABLE_BITS)); +- fx += dx; +- fy += dy; +- *dstC++ = cache[toggle + (sqrt_table[fi] >> (8 - kCache16Bits))]; +- toggle ^= (1 << kCache16Bits); +- } while (--count != 0); +- } +- } else if (proc == mirror_tileproc) { +- do { +- SkFixed dist = SkFixedSqrt(SkFixedSquare(fx) + SkFixedSquare(fy)); +- unsigned fi = mirror_tileproc(dist); +- SkASSERT(fi <= 0xFFFF); +- fx += dx; +- fy += dy; +- *dstC++ = cache[toggle + (fi >> (16 - kCache16Bits))]; +- toggle ^= (1 << kCache16Bits); +- } while (--count != 0); +- } else { +- SkASSERT(proc == repeat_tileproc); +- do { +- SkFixed dist = SkFixedSqrt(SkFixedSquare(fx) + SkFixedSquare(fy)); +- unsigned fi = repeat_tileproc(dist); +- SkASSERT(fi <= 0xFFFF); +- fx += dx; +- fy += dy; +- *dstC++ = cache[toggle + (fi >> (16 - kCache16Bits))]; +- toggle ^= (1 << kCache16Bits); +- } while (--count != 0); +- } +- } else { // perspective case +- SkScalar dstX = SkIntToScalar(x); +- SkScalar dstY = SkIntToScalar(y); +- do { +- dstProc(fDstToIndex, dstX, dstY, &srcPt); +- unsigned fi = proc(SkScalarToFixed(srcPt.length())); +- SkASSERT(fi <= 0xFFFF); +- +- int index = fi >> (16 - kCache16Bits); +- *dstC++ = cache[toggle + index]; +- toggle ^= (1 << kCache16Bits); +- +- dstX += SK_Scalar1; +- } while (--count != 0); +- } +- } ++ virtual void shadeSpan16(int x, int y, uint16_t* dstC, int count) SK_OVERRIDE; + + virtual BitmapType asABitmap(SkBitmap* bitmap, + SkMatrix* matrix, + TileMode* xy, + SkScalar* twoPointRadialParams) const SK_OVERRIDE { + if (bitmap) { + this->commonAsABitmap(bitmap); + } +@@ -1507,16 +1408,117 @@ void Radial_Gradient::shadeSpan(int x, i + unsigned fi = proc(SkScalarToFixed(srcPt.length())); + SkASSERT(fi <= 0xFFFF); + *dstC++ = cache[fi >> (16 - kCache32Bits)]; + dstX += SK_Scalar1; + } while (--count != 0); + } + } + ++void Radial_Gradient::shadeSpan16(int x, int y, uint16_t* SK_RESTRICT dstC, int count) { ++ SkASSERT(count > 0); ++ ++ SkPoint srcPt; ++ SkMatrix::MapXYProc dstProc = fDstToIndexProc; ++ TileProc proc = fTileProc; ++ const uint16_t* SK_RESTRICT cache = this->getCache16(); ++ int toggle = ((x ^ y) & 1) << kCache16Bits; ++ ++ if (fDstToIndexClass != kPerspective_MatrixClass) { ++ dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, ++ SkIntToScalar(y) + SK_ScalarHalf, &srcPt); ++ SkFixed dx, fx = SkScalarToFixed(srcPt.fX); ++ SkFixed dy, fy = SkScalarToFixed(srcPt.fY); ++ ++ if (fDstToIndexClass == kFixedStepInX_MatrixClass) { ++ SkFixed storage[2]; ++ (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), &storage[0], &storage[1]); ++ dx = storage[0]; ++ dy = storage[1]; ++ } else { ++ SkASSERT(fDstToIndexClass == kLinear_MatrixClass); ++ dx = SkScalarToFixed(fDstToIndex.getScaleX()); ++ dy = SkScalarToFixed(fDstToIndex.getSkewY()); ++ } ++ ++ if (proc == clamp_tileproc) { ++ const uint8_t* SK_RESTRICT sqrt_table = gSqrt8Table; ++ ++ /* knock these down so we can pin against +- 0x7FFF, which is an immediate load, ++ rather than 0xFFFF which is slower. This is a compromise, since it reduces our ++ precision, but that appears to be visually OK. If we decide this is OK for ++ all of our cases, we could (it seems) put this scale-down into fDstToIndex, ++ to avoid having to do these extra shifts each time. ++ */ ++ fx >>= 1; ++ dx >>= 1; ++ fy >>= 1; ++ dy >>= 1; ++ if (dy == 0) { // might perform this check for the other modes, but the win will be a smaller % of the total ++ fy = SkPin32(fy, -0xFFFF >> 1, 0xFFFF >> 1); ++ fy *= fy; ++ do { ++ unsigned xx = SkPin32(fx, -0xFFFF >> 1, 0xFFFF >> 1); ++ unsigned fi = (xx * xx + fy) >> (14 + 16 - kSQRT_TABLE_BITS); ++ fi = SkFastMin32(fi, 0xFFFF >> (16 - kSQRT_TABLE_BITS)); ++ fx += dx; ++ *dstC++ = cache[toggle + (sqrt_table[fi] >> (8 - kCache16Bits))]; ++ toggle ^= (1 << kCache16Bits); ++ } while (--count != 0); ++ } else { ++ do { ++ unsigned xx = SkPin32(fx, -0xFFFF >> 1, 0xFFFF >> 1); ++ unsigned fi = SkPin32(fy, -0xFFFF >> 1, 0xFFFF >> 1); ++ fi = (xx * xx + fi * fi) >> (14 + 16 - kSQRT_TABLE_BITS); ++ fi = SkFastMin32(fi, 0xFFFF >> (16 - kSQRT_TABLE_BITS)); ++ fx += dx; ++ fy += dy; ++ *dstC++ = cache[toggle + (sqrt_table[fi] >> (8 - kCache16Bits))]; ++ toggle ^= (1 << kCache16Bits); ++ } while (--count != 0); ++ } ++ } else if (proc == mirror_tileproc) { ++ do { ++ SkFixed dist = SkFixedSqrt(SkFixedSquare(fx) + SkFixedSquare(fy)); ++ unsigned fi = mirror_tileproc(dist); ++ SkASSERT(fi <= 0xFFFF); ++ fx += dx; ++ fy += dy; ++ *dstC++ = cache[toggle + (fi >> (16 - kCache16Bits))]; ++ toggle ^= (1 << kCache16Bits); ++ } while (--count != 0); ++ } else { ++ SkASSERT(proc == repeat_tileproc); ++ do { ++ SkFixed dist = SkFixedSqrt(SkFixedSquare(fx) + SkFixedSquare(fy)); ++ unsigned fi = repeat_tileproc(dist); ++ SkASSERT(fi <= 0xFFFF); ++ fx += dx; ++ fy += dy; ++ *dstC++ = cache[toggle + (fi >> (16 - kCache16Bits))]; ++ toggle ^= (1 << kCache16Bits); ++ } while (--count != 0); ++ } ++ } else { // perspective case ++ SkScalar dstX = SkIntToScalar(x); ++ SkScalar dstY = SkIntToScalar(y); ++ do { ++ dstProc(fDstToIndex, dstX, dstY, &srcPt); ++ unsigned fi = proc(SkScalarToFixed(srcPt.length())); ++ SkASSERT(fi <= 0xFFFF); ++ ++ int index = fi >> (16 - kCache16Bits); ++ *dstC++ = cache[toggle + index]; ++ toggle ^= (1 << kCache16Bits); ++ ++ dstX += SK_Scalar1; ++ } while (--count != 0); ++ } ++} ++ + /* Two-point radial gradients are specified by two circles, each with a center + point and radius. The gradient can be considered to be a series of + concentric circles, with the color interpolated from the start circle + (at t=0) to the end circle (at t=1). + + For each point (x, y) in the span, we want to find the + interpolated circle that intersects that point. The center + of the desired circle (Cx, Cy) falls at some distance t +@@ -1661,109 +1663,17 @@ public: + info->fPoint[0] = fCenter1; + info->fPoint[1] = fCenter2; + info->fRadius[0] = fRadius1; + info->fRadius[1] = fRadius2; + } + return kRadial2_GradientType; + } + +- virtual void shadeSpan(int x, int y, SkPMColor* SK_RESTRICT dstC, int count) SK_OVERRIDE { +- SkASSERT(count > 0); +- +- // Zero difference between radii: fill with transparent black. +- // TODO: Is removing this actually correct? Two circles with the +- // same radius, but different centers doesn't sound like it +- // should be cleared +- if (fDiffRadius == 0 && fCenter1 == fCenter2) { +- sk_bzero(dstC, count * sizeof(*dstC)); +- return; +- } +- SkMatrix::MapXYProc dstProc = fDstToIndexProc; +- TileProc proc = fTileProc; +- const SkPMColor* SK_RESTRICT cache = this->getCache32(); +- +- SkScalar foura = fA * 4; +- bool posRoot = fDiffRadius < 0; +- if (fDstToIndexClass != kPerspective_MatrixClass) { +- SkPoint srcPt; +- dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, +- SkIntToScalar(y) + SK_ScalarHalf, &srcPt); +- SkScalar dx, fx = srcPt.fX; +- SkScalar dy, fy = srcPt.fY; +- +- if (fDstToIndexClass == kFixedStepInX_MatrixClass) { +- SkFixed fixedX, fixedY; +- (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), &fixedX, &fixedY); +- dx = SkFixedToScalar(fixedX); +- dy = SkFixedToScalar(fixedY); +- } else { +- SkASSERT(fDstToIndexClass == kLinear_MatrixClass); +- dx = fDstToIndex.getScaleX(); +- dy = fDstToIndex.getSkewY(); +- } +- SkScalar b = (SkScalarMul(fDiff.fX, fx) + +- SkScalarMul(fDiff.fY, fy) - fStartRadius) * 2; +- SkScalar db = (SkScalarMul(fDiff.fX, dx) + +- SkScalarMul(fDiff.fY, dy)) * 2; +- if (proc == clamp_tileproc) { +- for (; count > 0; --count) { +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); +- if (t < 0) { +- *dstC++ = cache[-1]; +- } else if (t > 0xFFFF) { +- *dstC++ = cache[kCache32Count * 2]; +- } else { +- SkASSERT(t <= 0xFFFF); +- *dstC++ = cache[t >> (16 - kCache32Bits)]; +- } +- fx += dx; +- fy += dy; +- b += db; +- } +- } else if (proc == mirror_tileproc) { +- for (; count > 0; --count) { +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); +- SkFixed index = mirror_tileproc(t); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> (16 - kCache32Bits)]; +- fx += dx; +- fy += dy; +- b += db; +- } +- } else { +- SkASSERT(proc == repeat_tileproc); +- for (; count > 0; --count) { +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); +- SkFixed index = repeat_tileproc(t); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> (16 - kCache32Bits)]; +- fx += dx; +- fy += dy; +- b += db; +- } +- } +- } else { // perspective case +- SkScalar dstX = SkIntToScalar(x); +- SkScalar dstY = SkIntToScalar(y); +- for (; count > 0; --count) { +- SkPoint srcPt; +- dstProc(fDstToIndex, dstX, dstY, &srcPt); +- SkScalar fx = srcPt.fX; +- SkScalar fy = srcPt.fY; +- SkScalar b = (SkScalarMul(fDiff.fX, fx) + +- SkScalarMul(fDiff.fY, fy) - fStartRadius) * 2; +- SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); +- SkFixed index = proc(t); +- SkASSERT(index <= 0xFFFF); +- *dstC++ = cache[index >> (16 - kCache32Bits)]; +- dstX += SK_Scalar1; +- } +- } +- } ++ virtual void shadeSpan(int x, int y, SkPMColor* dstC, int count) SK_OVERRIDE; + + virtual bool setContext(const SkBitmap& device, + const SkPaint& paint, + const SkMatrix& matrix) SK_OVERRIDE { + if (!this->INHERITED::setContext(device, paint, matrix)) { + return false; + } + +@@ -1817,16 +1727,110 @@ private: + fA = SkScalarSquare(fDiff.fX) + SkScalarSquare(fDiff.fY) - SK_Scalar1; + fOneOverTwoA = fA ? SkScalarInvert(fA * 2) : 0; + + fPtsToUnit.setTranslate(-fCenter1.fX, -fCenter1.fY); + fPtsToUnit.postScale(inv, inv); + } + }; + ++void Two_Point_Radial_Gradient::shadeSpan(int x, int y, SkPMColor* SK_RESTRICT dstC, int count) { ++ SkASSERT(count > 0); ++ ++ // Zero difference between radii: fill with transparent black. ++ // TODO: Is removing this actually correct? Two circles with the ++ // same radius, but different centers doesn't sound like it ++ // should be cleared ++ if (fDiffRadius == 0 && fCenter1 == fCenter2) { ++ sk_bzero(dstC, count * sizeof(*dstC)); ++ return; ++ } ++ SkMatrix::MapXYProc dstProc = fDstToIndexProc; ++ TileProc proc = fTileProc; ++ const SkPMColor* SK_RESTRICT cache = this->getCache32(); ++ ++ SkScalar foura = fA * 4; ++ bool posRoot = fDiffRadius < 0; ++ if (fDstToIndexClass != kPerspective_MatrixClass) { ++ SkPoint srcPt; ++ dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, ++ SkIntToScalar(y) + SK_ScalarHalf, &srcPt); ++ SkScalar dx, fx = srcPt.fX; ++ SkScalar dy, fy = srcPt.fY; ++ ++ if (fDstToIndexClass == kFixedStepInX_MatrixClass) { ++ SkFixed fixedX, fixedY; ++ (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), &fixedX, &fixedY); ++ dx = SkFixedToScalar(fixedX); ++ dy = SkFixedToScalar(fixedY); ++ } else { ++ SkASSERT(fDstToIndexClass == kLinear_MatrixClass); ++ dx = fDstToIndex.getScaleX(); ++ dy = fDstToIndex.getSkewY(); ++ } ++ SkScalar b = (SkScalarMul(fDiff.fX, fx) + ++ SkScalarMul(fDiff.fY, fy) - fStartRadius) * 2; ++ SkScalar db = (SkScalarMul(fDiff.fX, dx) + ++ SkScalarMul(fDiff.fY, dy)) * 2; ++ if (proc == clamp_tileproc) { ++ for (; count > 0; --count) { ++ SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); ++ if (t < 0) { ++ *dstC++ = cache[-1]; ++ } else if (t > 0xFFFF) { ++ *dstC++ = cache[kCache32Count * 2]; ++ } else { ++ SkASSERT(t <= 0xFFFF); ++ *dstC++ = cache[t >> (16 - kCache32Bits)]; ++ } ++ fx += dx; ++ fy += dy; ++ b += db; ++ } ++ } else if (proc == mirror_tileproc) { ++ for (; count > 0; --count) { ++ SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); ++ SkFixed index = mirror_tileproc(t); ++ SkASSERT(index <= 0xFFFF); ++ *dstC++ = cache[index >> (16 - kCache32Bits)]; ++ fx += dx; ++ fy += dy; ++ b += db; ++ } ++ } else { ++ SkASSERT(proc == repeat_tileproc); ++ for (; count > 0; --count) { ++ SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); ++ SkFixed index = repeat_tileproc(t); ++ SkASSERT(index <= 0xFFFF); ++ *dstC++ = cache[index >> (16 - kCache32Bits)]; ++ fx += dx; ++ fy += dy; ++ b += db; ++ } ++ } ++ } else { // perspective case ++ SkScalar dstX = SkIntToScalar(x); ++ SkScalar dstY = SkIntToScalar(y); ++ for (; count > 0; --count) { ++ SkPoint srcPt; ++ dstProc(fDstToIndex, dstX, dstY, &srcPt); ++ SkScalar fx = srcPt.fX; ++ SkScalar fy = srcPt.fY; ++ SkScalar b = (SkScalarMul(fDiff.fX, fx) + ++ SkScalarMul(fDiff.fY, fy) - fStartRadius) * 2; ++ SkFixed t = two_point_radial(b, fx, fy, fSr2D2, foura, fOneOverTwoA, posRoot); ++ SkFixed index = proc(t); ++ SkASSERT(index <= 0xFFFF); ++ *dstC++ = cache[index >> (16 - kCache32Bits)]; ++ dstX += SK_Scalar1; ++ } ++ } ++} ++ + /////////////////////////////////////////////////////////////////////////////// + + class Sweep_Gradient : public Gradient_Shader { + public: + Sweep_Gradient(SkScalar cx, SkScalar cy, const SkColor colors[], + const SkScalar pos[], int count, SkUnitMapper* mapper) + : Gradient_Shader(colors, pos, count, SkShader::kClamp_TileMode, mapper), + fCenter(SkPoint::Make(cx, cy)) diff --git a/gfx/skia/patches/archive/uninitialized-margin.patch b/gfx/skia/patches/archive/uninitialized-margin.patch new file mode 100644 index 0000000000..b8ab213e7b --- /dev/null +++ b/gfx/skia/patches/archive/uninitialized-margin.patch @@ -0,0 +1,22 @@ +diff --git a/gfx/skia/src/core/SkDraw.cpp b/gfx/skia/src/core/SkDraw.cpp +--- a/gfx/skia/src/core/SkDraw.cpp ++++ b/gfx/skia/src/core/SkDraw.cpp +@@ -2529,17 +2529,17 @@ static bool compute_bounds(const SkPath& + + // init our bounds from the path + { + SkRect pathBounds = devPath.getBounds(); + pathBounds.inset(-SK_ScalarHalf, -SK_ScalarHalf); + pathBounds.roundOut(bounds); + } + +- SkIPoint margin; ++ SkIPoint margin = SkIPoint::Make(0, 0); + if (filter) { + SkASSERT(filterMatrix); + + SkMask srcM, dstM; + + srcM.fBounds = *bounds; + srcM.fFormat = SkMask::kA8_Format; + srcM.fImage = NULL; diff --git a/gfx/skia/patches/archive/user-config.patch b/gfx/skia/patches/archive/user-config.patch new file mode 100644 index 0000000000..11c6f1f638 --- /dev/null +++ b/gfx/skia/patches/archive/user-config.patch @@ -0,0 +1,40 @@ +diff --git a/gfx/skia/include/config/SkUserConfig.h b/gfx/skia/include/config/SkUserConfig.h +--- a/gfx/skia/include/config/SkUserConfig.h ++++ b/gfx/skia/include/config/SkUserConfig.h +@@ -140,16 +140,20 @@ + /* If SK_DEBUG is defined, then you can optionally define SK_SUPPORT_UNITTEST + which will run additional self-tests at startup. These can take a long time, + so this flag is optional. + */ + #ifdef SK_DEBUG + //#define SK_SUPPORT_UNITTEST + #endif + ++/* Don't dither 32bit gradients, to match what the canvas test suite expects. ++ */ ++#define SK_DISABLE_DITHER_32BIT_GRADIENT ++ + /* If your system embeds skia and has complex event logging, define this + symbol to name a file that maps the following macros to your system's + equivalents: + SK_TRACE_EVENT0(event) + SK_TRACE_EVENT1(event, name1, value1) + SK_TRACE_EVENT2(event, name1, value1, name2, value2) + src/utils/SkDebugTrace.h has a trivial implementation that writes to + the debug output stream. If SK_USER_TRACE_INCLUDE_FILE is not defined, +@@ -161,9 +165,15 @@ + */ + #ifdef SK_SAMPLES_FOR_X + #define SK_R32_SHIFT 16 + #define SK_G32_SHIFT 8 + #define SK_B32_SHIFT 0 + #define SK_A32_SHIFT 24 + #endif + ++/* Don't include stdint.h on windows as it conflicts with our build system. ++ */ ++#ifdef SK_BUILD_FOR_WIN32 ++ #define SK_IGNORE_STDINT_DOT_H ++#endif ++ + #endif diff --git a/gfx/skia/skia/include/codec/SkAndroidCodec.h b/gfx/skia/skia/include/codec/SkAndroidCodec.h new file mode 100644 index 0000000000..2b8a79751c --- /dev/null +++ b/gfx/skia/skia/include/codec/SkAndroidCodec.h @@ -0,0 +1,297 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAndroidCodec_DEFINED +#define SkAndroidCodec_DEFINED + +#include "include/codec/SkCodec.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "include/private/SkEncodedInfo.h" +#include "include/private/base/SkNoncopyable.h" +#include "modules/skcms/skcms.h" + +// TODO(kjlubick, bungeman) Replace these includes with forward declares +#include "include/codec/SkEncodedImageFormat.h" // IWYU pragma: keep +#include "include/core/SkAlphaType.h" // IWYU pragma: keep +#include "include/core/SkColorType.h" // IWYU pragma: keep + +#include +#include + +class SkData; +class SkPngChunkReader; +class SkStream; +struct SkGainmapInfo; +struct SkIRect; + +/** + * Abstract interface defining image codec functionality that is necessary for + * Android. + */ +class SK_API SkAndroidCodec : SkNoncopyable { +public: + /** + * Deprecated. + * + * Now that SkAndroidCodec supports multiframe images, there are multiple + * ways to handle compositing an oriented frame on top of an oriented frame + * with different tradeoffs. SkAndroidCodec now ignores the orientation and + * forces the client to handle it. + */ + enum class ExifOrientationBehavior { + kIgnore, + kRespect, + }; + + /** + * Pass ownership of an SkCodec to a newly-created SkAndroidCodec. + */ + static std::unique_ptr MakeFromCodec(std::unique_ptr); + + /** + * If this stream represents an encoded image that we know how to decode, + * return an SkAndroidCodec that can decode it. Otherwise return NULL. + * + * The SkPngChunkReader handles unknown chunks in PNGs. + * See SkCodec.h for more details. + * + * If NULL is returned, the stream is deleted immediately. Otherwise, the + * SkCodec takes ownership of it, and will delete it when done with it. + */ + static std::unique_ptr MakeFromStream(std::unique_ptr, + SkPngChunkReader* = nullptr); + + /** + * If this data represents an encoded image that we know how to decode, + * return an SkAndroidCodec that can decode it. Otherwise return NULL. + * + * The SkPngChunkReader handles unknown chunks in PNGs. + * See SkCodec.h for more details. + */ + static std::unique_ptr MakeFromData(sk_sp, SkPngChunkReader* = nullptr); + + virtual ~SkAndroidCodec(); + + // TODO: fInfo is now just a cache of SkCodec's SkImageInfo. No need to + // cache and return a reference here, once Android call-sites are updated. + const SkImageInfo& getInfo() const { return fInfo; } + + /** + * Return the ICC profile of the encoded data. + */ + const skcms_ICCProfile* getICCProfile() const { + return fCodec->getEncodedInfo().profile(); + } + + /** + * Format of the encoded data. + */ + SkEncodedImageFormat getEncodedFormat() const { return fCodec->getEncodedFormat(); } + + /** + * @param requestedColorType Color type requested by the client + * + * |requestedColorType| may be overriden. We will default to kF16 + * for high precision images. + * + * In the general case, if it is possible to decode to + * |requestedColorType|, this returns |requestedColorType|. + * Otherwise, this returns a color type that is an appropriate + * match for the the encoded data. + */ + SkColorType computeOutputColorType(SkColorType requestedColorType); + + /** + * @param requestedUnpremul Indicates if the client requested + * unpremultiplied output + * + * Returns the appropriate alpha type to decode to. If the image + * has alpha, the value of requestedUnpremul will be honored. + */ + SkAlphaType computeOutputAlphaType(bool requestedUnpremul); + + /** + * @param outputColorType Color type that the client will decode to. + * @param prefColorSpace Preferred color space to decode to. + * This may not return |prefColorSpace| for + * specific color types. + * + * Returns the appropriate color space to decode to. + */ + sk_sp computeOutputColorSpace(SkColorType outputColorType, + sk_sp prefColorSpace = nullptr); + + /** + * Compute the appropriate sample size to get to |size|. + * + * @param size As an input parameter, the desired output size of + * the decode. As an output parameter, the smallest sampled size + * larger than the input. + * @return the sample size to set AndroidOptions::fSampleSize to decode + * to the output |size|. + */ + int computeSampleSize(SkISize* size) const; + + /** + * Returns the dimensions of the scaled output image, for an input + * sampleSize. + * + * When the sample size divides evenly into the original dimensions, the + * scaled output dimensions will simply be equal to the original + * dimensions divided by the sample size. + * + * When the sample size does not divide even into the original + * dimensions, the codec may round up or down, depending on what is most + * efficient to decode. + * + * Finally, the codec will always recommend a non-zero output, so the output + * dimension will always be one if the sampleSize is greater than the + * original dimension. + */ + SkISize getSampledDimensions(int sampleSize) const; + + /** + * Return (via desiredSubset) a subset which can decoded from this codec, + * or false if the input subset is invalid. + * + * @param desiredSubset in/out parameter + * As input, a desired subset of the original bounds + * (as specified by getInfo). + * As output, if true is returned, desiredSubset may + * have been modified to a subset which is + * supported. Although a particular change may have + * been made to desiredSubset to create something + * supported, it is possible other changes could + * result in a valid subset. If false is returned, + * desiredSubset's value is undefined. + * @return true If the input desiredSubset is valid. + * desiredSubset may be modified to a subset + * supported by the codec. + * false If desiredSubset is invalid (NULL or not fully + * contained within the image). + */ + bool getSupportedSubset(SkIRect* desiredSubset) const; + // TODO: Rename SkCodec::getValidSubset() to getSupportedSubset() + + /** + * Returns the dimensions of the scaled, partial output image, for an + * input sampleSize and subset. + * + * @param sampleSize Factor to scale down by. + * @param subset Must be a valid subset of the original image + * dimensions and a subset supported by SkAndroidCodec. + * getSubset() can be used to obtain a subset supported + * by SkAndroidCodec. + * @return Size of the scaled partial image. Or zero size + * if either of the inputs is invalid. + */ + SkISize getSampledSubsetDimensions(int sampleSize, const SkIRect& subset) const; + + /** + * Additional options to pass to getAndroidPixels(). + */ + // FIXME: It's a bit redundant to name these AndroidOptions when this class is already + // called SkAndroidCodec. On the other hand, it's may be a bit confusing to call + // these Options when SkCodec has a slightly different set of Options. Maybe these + // should be DecodeOptions or SamplingOptions? + struct AndroidOptions : public SkCodec::Options { + AndroidOptions() + : SkCodec::Options() + , fSampleSize(1) + {} + + /** + * The client may provide an integer downscale factor for the decode. + * The codec may implement this downscaling by sampling or another + * method if it is more efficient. + * + * The default is 1, representing no downscaling. + */ + int fSampleSize; + }; + + /** + * Decode into the given pixels, a block of memory of size at + * least (info.fHeight - 1) * rowBytes + (info.fWidth * + * bytesPerPixel) + * + * Repeated calls to this function should give the same results, + * allowing the PixelRef to be immutable. + * + * @param info A description of the format (config, size) + * expected by the caller. This can simply be identical + * to the info returned by getInfo(). + * + * This contract also allows the caller to specify + * different output-configs, which the implementation can + * decide to support or not. + * + * A size that does not match getInfo() implies a request + * to scale or subset. If the codec cannot perform this + * scaling or subsetting, it will return an error code. + * + * The AndroidOptions object is also used to specify any requested scaling or subsetting + * using options->fSampleSize and options->fSubset. If NULL, the defaults (as specified above + * for AndroidOptions) are used. + * + * @return Result kSuccess, or another value explaining the type of failure. + */ + // FIXME: It's a bit redundant to name this getAndroidPixels() when this class is already + // called SkAndroidCodec. On the other hand, it's may be a bit confusing to call + // this getPixels() when it is a slightly different API than SkCodec's getPixels(). + // Maybe this should be decode() or decodeSubset()? + SkCodec::Result getAndroidPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + const AndroidOptions* options); + + /** + * Simplified version of getAndroidPixels() where we supply the default AndroidOptions as + * specified above for AndroidOptions. It will not perform any scaling or subsetting. + */ + SkCodec::Result getAndroidPixels(const SkImageInfo& info, void* pixels, size_t rowBytes); + + SkCodec::Result getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) { + return this->getAndroidPixels(info, pixels, rowBytes); + } + + SkCodec* codec() const { return fCodec.get(); } + + /** + * Retrieve the gainmap for an image. + * + * @param outInfo On success, this is populated with the parameters for + * rendering this gainmap. This parameter must be non-nullptr. + * + * @param outGainmapImageStream On success, this is populated with a stream from which the + * gainmap image may be decoded. This parameter is optional, and + * may be set to nullptr. + * + * @return If this has a gainmap image and that gainmap image was + * successfully extracted then return true. Otherwise return + * false. + */ + bool getAndroidGainmap(SkGainmapInfo* outInfo, + std::unique_ptr* outGainmapImageStream); + +protected: + SkAndroidCodec(SkCodec*); + + virtual SkISize onGetSampledDimensions(int sampleSize) const = 0; + + virtual bool onGetSupportedSubset(SkIRect* desiredSubset) const = 0; + + virtual SkCodec::Result onGetAndroidPixels(const SkImageInfo& info, void* pixels, + size_t rowBytes, const AndroidOptions& options) = 0; + +private: + const SkImageInfo fInfo; + std::unique_ptr fCodec; +}; +#endif // SkAndroidCodec_DEFINED diff --git a/gfx/skia/skia/include/codec/SkCodec.h b/gfx/skia/skia/include/codec/SkCodec.h new file mode 100644 index 0000000000..3ed1a95a80 --- /dev/null +++ b/gfx/skia/skia/include/codec/SkCodec.h @@ -0,0 +1,1015 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCodec_DEFINED +#define SkCodec_DEFINED + +#include "include/codec/SkEncodedOrigin.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "include/core/SkYUVAPixmaps.h" +#include "include/private/SkEncodedInfo.h" +#include "include/private/base/SkNoncopyable.h" +#include "modules/skcms/skcms.h" + +#include +#include +#include +#include +#include + +class SkData; +class SkFrameHolder; +class SkImage; +class SkPngChunkReader; +class SkSampler; +class SkStream; +struct SkGainmapInfo; +enum SkAlphaType : int; +enum class SkEncodedImageFormat; + +namespace SkCodecAnimation { +enum class Blend; +enum class DisposalMethod; +} + + +namespace DM { +class CodecSrc; +} // namespace DM + +/** + * Abstraction layer directly on top of an image codec. + */ +class SK_API SkCodec : SkNoncopyable { +public: + /** + * Minimum number of bytes that must be buffered in SkStream input. + * + * An SkStream passed to NewFromStream must be able to use this many + * bytes to determine the image type. Then the same SkStream must be + * passed to the correct decoder to read from the beginning. + * + * This can be accomplished by implementing peek() to support peeking + * this many bytes, or by implementing rewind() to be able to rewind() + * after reading this many bytes. + */ + static constexpr size_t MinBufferedBytesNeeded() { return 32; } + + /** + * Error codes for various SkCodec methods. + */ + enum Result { + /** + * General return value for success. + */ + kSuccess, + /** + * The input is incomplete. A partial image was generated. + */ + kIncompleteInput, + /** + * Like kIncompleteInput, except the input had an error. + * + * If returned from an incremental decode, decoding cannot continue, + * even with more data. + */ + kErrorInInput, + /** + * The generator cannot convert to match the request, ignoring + * dimensions. + */ + kInvalidConversion, + /** + * The generator cannot scale to requested size. + */ + kInvalidScale, + /** + * Parameters (besides info) are invalid. e.g. NULL pixels, rowBytes + * too small, etc. + */ + kInvalidParameters, + /** + * The input did not contain a valid image. + */ + kInvalidInput, + /** + * Fulfilling this request requires rewinding the input, which is not + * supported for this input. + */ + kCouldNotRewind, + /** + * An internal error, such as OOM. + */ + kInternalError, + /** + * This method is not implemented by this codec. + * FIXME: Perhaps this should be kUnsupported? + */ + kUnimplemented, + }; + + /** + * Readable string representing the error code. + */ + static const char* ResultToString(Result); + + /** + * For container formats that contain both still images and image sequences, + * instruct the decoder how the output should be selected. (Refer to comments + * for each value for more details.) + */ + enum class SelectionPolicy { + /** + * If the container format contains both still images and image sequences, + * SkCodec should choose one of the still images. This is the default. + */ + kPreferStillImage, + /** + * If the container format contains both still images and image sequences, + * SkCodec should choose one of the image sequences for animation. + */ + kPreferAnimation, + }; + + /** + * If this stream represents an encoded image that we know how to decode, + * return an SkCodec that can decode it. Otherwise return NULL. + * + * As stated above, this call must be able to peek or read + * MinBufferedBytesNeeded to determine the correct format, and then start + * reading from the beginning. First it will attempt to peek, and it + * assumes that if less than MinBufferedBytesNeeded bytes (but more than + * zero) are returned, this is because the stream is shorter than this, + * so falling back to reading would not provide more data. If peek() + * returns zero bytes, this call will instead attempt to read(). This + * will require that the stream can be rewind()ed. + * + * If Result is not NULL, it will be set to either kSuccess if an SkCodec + * is returned or a reason for the failure if NULL is returned. + * + * If SkPngChunkReader is not NULL, take a ref and pass it to libpng if + * the image is a png. + * + * If the SkPngChunkReader is not NULL then: + * If the image is not a PNG, the SkPngChunkReader will be ignored. + * If the image is a PNG, the SkPngChunkReader will be reffed. + * If the PNG has unknown chunks, the SkPngChunkReader will be used + * to handle these chunks. SkPngChunkReader will be called to read + * any unknown chunk at any point during the creation of the codec + * or the decode. Note that if SkPngChunkReader fails to read a + * chunk, this could result in a failure to create the codec or a + * failure to decode the image. + * If the PNG does not contain unknown chunks, the SkPngChunkReader + * will not be used or modified. + * + * If NULL is returned, the stream is deleted immediately. Otherwise, the + * SkCodec takes ownership of it, and will delete it when done with it. + */ + static std::unique_ptr MakeFromStream( + std::unique_ptr, Result* = nullptr, + SkPngChunkReader* = nullptr, + SelectionPolicy selectionPolicy = SelectionPolicy::kPreferStillImage); + + /** + * If this data represents an encoded image that we know how to decode, + * return an SkCodec that can decode it. Otherwise return NULL. + * + * If the SkPngChunkReader is not NULL then: + * If the image is not a PNG, the SkPngChunkReader will be ignored. + * If the image is a PNG, the SkPngChunkReader will be reffed. + * If the PNG has unknown chunks, the SkPngChunkReader will be used + * to handle these chunks. SkPngChunkReader will be called to read + * any unknown chunk at any point during the creation of the codec + * or the decode. Note that if SkPngChunkReader fails to read a + * chunk, this could result in a failure to create the codec or a + * failure to decode the image. + * If the PNG does not contain unknown chunks, the SkPngChunkReader + * will not be used or modified. + */ + static std::unique_ptr MakeFromData(sk_sp, SkPngChunkReader* = nullptr); + + virtual ~SkCodec(); + + /** + * Return a reasonable SkImageInfo to decode into. + * + * If the image has an ICC profile that does not map to an SkColorSpace, + * the returned SkImageInfo will use SRGB. + */ + SkImageInfo getInfo() const { return fEncodedInfo.makeImageInfo(); } + + SkISize dimensions() const { return {fEncodedInfo.width(), fEncodedInfo.height()}; } + SkIRect bounds() const { + return SkIRect::MakeWH(fEncodedInfo.width(), fEncodedInfo.height()); + } + + /** + * Return the ICC profile of the encoded data. + */ + const skcms_ICCProfile* getICCProfile() const { + return this->getEncodedInfo().profile(); + } + + /** + * Returns the image orientation stored in the EXIF data. + * If there is no EXIF data, or if we cannot read the EXIF data, returns kTopLeft. + */ + SkEncodedOrigin getOrigin() const { return fOrigin; } + + /** + * Return a size that approximately supports the desired scale factor. + * The codec may not be able to scale efficiently to the exact scale + * factor requested, so return a size that approximates that scale. + * The returned value is the codec's suggestion for the closest valid + * scale that it can natively support + */ + SkISize getScaledDimensions(float desiredScale) const { + // Negative and zero scales are errors. + SkASSERT(desiredScale > 0.0f); + if (desiredScale <= 0.0f) { + return SkISize::Make(0, 0); + } + + // Upscaling is not supported. Return the original size if the client + // requests an upscale. + if (desiredScale >= 1.0f) { + return this->dimensions(); + } + return this->onGetScaledDimensions(desiredScale); + } + + /** + * Return (via desiredSubset) a subset which can decoded from this codec, + * or false if this codec cannot decode subsets or anything similar to + * desiredSubset. + * + * @param desiredSubset In/out parameter. As input, a desired subset of + * the original bounds (as specified by getInfo). If true is returned, + * desiredSubset may have been modified to a subset which is + * supported. Although a particular change may have been made to + * desiredSubset to create something supported, it is possible other + * changes could result in a valid subset. + * If false is returned, desiredSubset's value is undefined. + * @return true if this codec supports decoding desiredSubset (as + * returned, potentially modified) + */ + bool getValidSubset(SkIRect* desiredSubset) const { + return this->onGetValidSubset(desiredSubset); + } + + /** + * Format of the encoded data. + */ + SkEncodedImageFormat getEncodedFormat() const { return this->onGetEncodedFormat(); } + + /** + * Whether or not the memory passed to getPixels is zero initialized. + */ + enum ZeroInitialized { + /** + * The memory passed to getPixels is zero initialized. The SkCodec + * may take advantage of this by skipping writing zeroes. + */ + kYes_ZeroInitialized, + /** + * The memory passed to getPixels has not been initialized to zero, + * so the SkCodec must write all zeroes to memory. + * + * This is the default. It will be used if no Options struct is used. + */ + kNo_ZeroInitialized, + }; + + /** + * Additional options to pass to getPixels. + */ + struct Options { + Options() + : fZeroInitialized(kNo_ZeroInitialized) + , fSubset(nullptr) + , fFrameIndex(0) + , fPriorFrame(kNoFrame) + {} + + ZeroInitialized fZeroInitialized; + /** + * If not NULL, represents a subset of the original image to decode. + * Must be within the bounds returned by getInfo(). + * If the EncodedFormat is SkEncodedImageFormat::kWEBP (the only one which + * currently supports subsets), the top and left values must be even. + * + * In getPixels and incremental decode, we will attempt to decode the + * exact rectangular subset specified by fSubset. + * + * In a scanline decode, it does not make sense to specify a subset + * top or subset height, since the client already controls which rows + * to get and which rows to skip. During scanline decodes, we will + * require that the subset top be zero and the subset height be equal + * to the full height. We will, however, use the values of + * subset left and subset width to decode partial scanlines on calls + * to getScanlines(). + */ + const SkIRect* fSubset; + + /** + * The frame to decode. + * + * Only meaningful for multi-frame images. + */ + int fFrameIndex; + + /** + * If not kNoFrame, the dst already contains the prior frame at this index. + * + * Only meaningful for multi-frame images. + * + * If fFrameIndex needs to be blended with a prior frame (as reported by + * getFrameInfo[fFrameIndex].fRequiredFrame), the client can set this to + * any non-kRestorePrevious frame in [fRequiredFrame, fFrameIndex) to + * indicate that that frame is already in the dst. Options.fZeroInitialized + * is ignored in this case. + * + * If set to kNoFrame, the codec will decode any necessary required frame(s) first. + */ + int fPriorFrame; + }; + + /** + * Decode into the given pixels, a block of memory of size at + * least (info.fHeight - 1) * rowBytes + (info.fWidth * + * bytesPerPixel) + * + * Repeated calls to this function should give the same results, + * allowing the PixelRef to be immutable. + * + * @param info A description of the format (config, size) + * expected by the caller. This can simply be identical + * to the info returned by getInfo(). + * + * This contract also allows the caller to specify + * different output-configs, which the implementation can + * decide to support or not. + * + * A size that does not match getInfo() implies a request + * to scale. If the generator cannot perform this scale, + * it will return kInvalidScale. + * + * If the info contains a non-null SkColorSpace, the codec + * will perform the appropriate color space transformation. + * + * If the caller passes in the SkColorSpace that maps to the + * ICC profile reported by getICCProfile(), the color space + * transformation is a no-op. + * + * If the caller passes a null SkColorSpace, no color space + * transformation will be done. + * + * If a scanline decode is in progress, scanline mode will end, requiring the client to call + * startScanlineDecode() in order to return to decoding scanlines. + * + * @return Result kSuccess, or another value explaining the type of failure. + */ + Result getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, const Options*); + + /** + * Simplified version of getPixels() that uses the default Options. + */ + Result getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) { + return this->getPixels(info, pixels, rowBytes, nullptr); + } + + Result getPixels(const SkPixmap& pm, const Options* opts = nullptr) { + return this->getPixels(pm.info(), pm.writable_addr(), pm.rowBytes(), opts); + } + + /** + * Return an image containing the pixels. + */ + std::tuple, SkCodec::Result> getImage(const SkImageInfo& info, + const Options* opts = nullptr); + std::tuple, SkCodec::Result> getImage(); + + /** + * If decoding to YUV is supported, this returns true. Otherwise, this + * returns false and the caller will ignore output parameter yuvaPixmapInfo. + * + * @param supportedDataTypes Indicates the data type/planar config combinations that are + * supported by the caller. If the generator supports decoding to + * YUV(A), but not as a type in supportedDataTypes, this method + * returns false. + * @param yuvaPixmapInfo Output parameter that specifies the planar configuration, subsampling, + * orientation, chroma siting, plane color types, and row bytes. + */ + bool queryYUVAInfo(const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes, + SkYUVAPixmapInfo* yuvaPixmapInfo) const; + + /** + * Returns kSuccess, or another value explaining the type of failure. + * This always attempts to perform a full decode. To get the planar + * configuration without decoding use queryYUVAInfo(). + * + * @param yuvaPixmaps Contains preallocated pixmaps configured according to a successful call + * to queryYUVAInfo(). + */ + Result getYUVAPlanes(const SkYUVAPixmaps& yuvaPixmaps); + + /** + * Prepare for an incremental decode with the specified options. + * + * This may require a rewind. + * + * If kIncompleteInput is returned, may be called again after more data has + * been provided to the source SkStream. + * + * @param dstInfo Info of the destination. If the dimensions do not match + * those of getInfo, this implies a scale. + * @param dst Memory to write to. Needs to be large enough to hold the subset, + * if present, or the full image as described in dstInfo. + * @param options Contains decoding options, including if memory is zero + * initialized and whether to decode a subset. + * @return Enum representing success or reason for failure. + */ + Result startIncrementalDecode(const SkImageInfo& dstInfo, void* dst, size_t rowBytes, + const Options*); + + Result startIncrementalDecode(const SkImageInfo& dstInfo, void* dst, size_t rowBytes) { + return this->startIncrementalDecode(dstInfo, dst, rowBytes, nullptr); + } + + /** + * Start/continue the incremental decode. + * + * Not valid to call before a call to startIncrementalDecode() returns + * kSuccess. + * + * If kIncompleteInput is returned, may be called again after more data has + * been provided to the source SkStream. + * + * Unlike getPixels and getScanlines, this does not do any filling. This is + * left up to the caller, since they may be skipping lines or continuing the + * decode later. In the latter case, they may choose to initialize all lines + * first, or only initialize the remaining lines after the first call. + * + * @param rowsDecoded Optional output variable returning the total number of + * lines initialized. Only meaningful if this method returns kIncompleteInput. + * Otherwise the implementation may not set it. + * Note that some implementations may have initialized this many rows, but + * not necessarily finished those rows (e.g. interlaced PNG). This may be + * useful for determining what rows the client needs to initialize. + * @return kSuccess if all lines requested in startIncrementalDecode have + * been completely decoded. kIncompleteInput otherwise. + */ + Result incrementalDecode(int* rowsDecoded = nullptr) { + if (!fStartedIncrementalDecode) { + return kInvalidParameters; + } + return this->onIncrementalDecode(rowsDecoded); + } + + /** + * The remaining functions revolve around decoding scanlines. + */ + + /** + * Prepare for a scanline decode with the specified options. + * + * After this call, this class will be ready to decode the first scanline. + * + * This must be called in order to call getScanlines or skipScanlines. + * + * This may require rewinding the stream. + * + * Not all SkCodecs support this. + * + * @param dstInfo Info of the destination. If the dimensions do not match + * those of getInfo, this implies a scale. + * @param options Contains decoding options, including if memory is zero + * initialized. + * @return Enum representing success or reason for failure. + */ + Result startScanlineDecode(const SkImageInfo& dstInfo, const Options* options); + + /** + * Simplified version of startScanlineDecode() that uses the default Options. + */ + Result startScanlineDecode(const SkImageInfo& dstInfo) { + return this->startScanlineDecode(dstInfo, nullptr); + } + + /** + * Write the next countLines scanlines into dst. + * + * Not valid to call before calling startScanlineDecode(). + * + * @param dst Must be non-null, and large enough to hold countLines + * scanlines of size rowBytes. + * @param countLines Number of lines to write. + * @param rowBytes Number of bytes per row. Must be large enough to hold + * a scanline based on the SkImageInfo used to create this object. + * @return the number of lines successfully decoded. If this value is + * less than countLines, this will fill the remaining lines with a + * default value. + */ + int getScanlines(void* dst, int countLines, size_t rowBytes); + + /** + * Skip count scanlines. + * + * Not valid to call before calling startScanlineDecode(). + * + * The default version just calls onGetScanlines and discards the dst. + * NOTE: If skipped lines are the only lines with alpha, this default + * will make reallyHasAlpha return true, when it could have returned + * false. + * + * @return true if the scanlines were successfully skipped + * false on failure, possible reasons for failure include: + * An incomplete input image stream. + * Calling this function before calling startScanlineDecode(). + * If countLines is less than zero or so large that it moves + * the current scanline past the end of the image. + */ + bool skipScanlines(int countLines); + + /** + * The order in which rows are output from the scanline decoder is not the + * same for all variations of all image types. This explains the possible + * output row orderings. + */ + enum SkScanlineOrder { + /* + * By far the most common, this indicates that the image can be decoded + * reliably using the scanline decoder, and that rows will be output in + * the logical order. + */ + kTopDown_SkScanlineOrder, + + /* + * This indicates that the scanline decoder reliably outputs rows, but + * they will be returned in reverse order. If the scanline format is + * kBottomUp, the nextScanline() API can be used to determine the actual + * y-coordinate of the next output row, but the client is not forced + * to take advantage of this, given that it's not too tough to keep + * track independently. + * + * For full image decodes, it is safe to get all of the scanlines at + * once, since the decoder will handle inverting the rows as it + * decodes. + * + * For subset decodes and sampling, it is simplest to get and skip + * scanlines one at a time, using the nextScanline() API. It is + * possible to ask for larger chunks at a time, but this should be used + * with caution. As with full image decodes, the decoder will handle + * inverting the requested rows, but rows will still be delivered + * starting from the bottom of the image. + * + * Upside down bmps are an example. + */ + kBottomUp_SkScanlineOrder, + }; + + /** + * An enum representing the order in which scanlines will be returned by + * the scanline decoder. + * + * This is undefined before startScanlineDecode() is called. + */ + SkScanlineOrder getScanlineOrder() const { return this->onGetScanlineOrder(); } + + /** + * Returns the y-coordinate of the next row to be returned by the scanline + * decoder. + * + * This will equal fCurrScanline, except in the case of strangely + * encoded image types (bottom-up bmps). + * + * Results are undefined when not in scanline decoding mode. + */ + int nextScanline() const { return this->outputScanline(fCurrScanline); } + + /** + * Returns the output y-coordinate of the row that corresponds to an input + * y-coordinate. The input y-coordinate represents where the scanline + * is located in the encoded data. + * + * This will equal inputScanline, except in the case of strangely + * encoded image types (bottom-up bmps, interlaced gifs). + */ + int outputScanline(int inputScanline) const; + + /** + * Return the number of frames in the image. + * + * May require reading through the stream. + */ + int getFrameCount() { + return this->onGetFrameCount(); + } + + // Sentinel value used when a frame index implies "no frame": + // - FrameInfo::fRequiredFrame set to this value means the frame + // is independent. + // - Options::fPriorFrame set to this value means no (relevant) prior frame + // is residing in dst's memory. + static constexpr int kNoFrame = -1; + + // This transitional definition was added in August 2018, and will eventually be removed. +#ifdef SK_LEGACY_SKCODEC_NONE_ENUM + static constexpr int kNone = kNoFrame; +#endif + + /** + * Information about individual frames in a multi-framed image. + */ + struct FrameInfo { + /** + * The frame that this frame needs to be blended with, or + * kNoFrame if this frame is independent (so it can be + * drawn over an uninitialized buffer). + * + * Note that this is the *earliest* frame that can be used + * for blending. Any frame from [fRequiredFrame, i) can be + * used, unless its fDisposalMethod is kRestorePrevious. + */ + int fRequiredFrame; + + /** + * Number of milliseconds to show this frame. + */ + int fDuration; + + /** + * Whether the end marker for this frame is contained in the stream. + * + * Note: this does not guarantee that an attempt to decode will be complete. + * There could be an error in the stream. + */ + bool fFullyReceived; + + /** + * This is conservative; it will still return non-opaque if e.g. a + * color index-based frame has a color with alpha but does not use it. + */ + SkAlphaType fAlphaType; + + /** + * Whether the updated rectangle contains alpha. + * + * This is conservative; it will still be set to true if e.g. a color + * index-based frame has a color with alpha but does not use it. In + * addition, it may be set to true, even if the final frame, after + * blending, is opaque. + */ + bool fHasAlphaWithinBounds; + + /** + * How this frame should be modified before decoding the next one. + */ + SkCodecAnimation::DisposalMethod fDisposalMethod; + + /** + * How this frame should blend with the prior frame. + */ + SkCodecAnimation::Blend fBlend; + + /** + * The rectangle updated by this frame. + * + * It may be empty, if the frame does not change the image. It will + * always be contained by SkCodec::dimensions(). + */ + SkIRect fFrameRect; + }; + + /** + * Return info about a single frame. + * + * Does not read through the stream, so it should be called after + * getFrameCount() to parse any frames that have not already been parsed. + * + * Only supported by animated (multi-frame) codecs. Note that this is a + * property of the codec (the SkCodec subclass), not the image. + * + * To elaborate, some codecs support animation (e.g. GIF). Others do not + * (e.g. BMP). Animated codecs can still represent single frame images. + * Calling getFrameInfo(0, etc) will return true for a single frame GIF + * even if the overall image is not animated (in that the pixels on screen + * do not change over time). When incrementally decoding a GIF image, we + * might only know that there's a single frame *so far*. + * + * For non-animated SkCodec subclasses, it's sufficient but not necessary + * for this method to always return false. + */ + bool getFrameInfo(int index, FrameInfo* info) const { + if (index < 0) { + return false; + } + return this->onGetFrameInfo(index, info); + } + + /** + * Return info about all the frames in the image. + * + * May require reading through the stream to determine info about the + * frames (including the count). + * + * As such, future decoding calls may require a rewind. + * + * This may return an empty vector for non-animated codecs. See the + * getFrameInfo(int, FrameInfo*) comment. + */ + std::vector getFrameInfo(); + + static constexpr int kRepetitionCountInfinite = -1; + + /** + * Return the number of times to repeat, if this image is animated. This number does not + * include the first play through of each frame. For example, a repetition count of 4 means + * that each frame is played 5 times and then the animation stops. + * + * It can return kRepetitionCountInfinite, a negative number, meaning that the animation + * should loop forever. + * + * May require reading the stream to find the repetition count. + * + * As such, future decoding calls may require a rewind. + * + * For still (non-animated) image codecs, this will return 0. + */ + int getRepetitionCount() { + return this->onGetRepetitionCount(); + } + + // Register a decoder at runtime by passing two function pointers: + // - peek() to return true if the span of bytes appears to be your encoded format; + // - make() to attempt to create an SkCodec from the given stream. + // Not thread safe. + static void Register( + bool (*peek)(const void*, size_t), + std::unique_ptr (*make)(std::unique_ptr, SkCodec::Result*)); + +protected: + const SkEncodedInfo& getEncodedInfo() const { return fEncodedInfo; } + + using XformFormat = skcms_PixelFormat; + + SkCodec(SkEncodedInfo&&, + XformFormat srcFormat, + std::unique_ptr, + SkEncodedOrigin = kTopLeft_SkEncodedOrigin); + + void setSrcXformFormat(XformFormat pixelFormat); + + XformFormat getSrcXformFormat() const { + return fSrcXformFormat; + } + + virtual bool onGetGainmapInfo(SkGainmapInfo*, std::unique_ptr*) { return false; } + + virtual SkISize onGetScaledDimensions(float /*desiredScale*/) const { + // By default, scaling is not supported. + return this->dimensions(); + } + + // FIXME: What to do about subsets?? + /** + * Subclasses should override if they support dimensions other than the + * srcInfo's. + */ + virtual bool onDimensionsSupported(const SkISize&) { + return false; + } + + virtual SkEncodedImageFormat onGetEncodedFormat() const = 0; + + /** + * @param rowsDecoded When the encoded image stream is incomplete, this function + * will return kIncompleteInput and rowsDecoded will be set to + * the number of scanlines that were successfully decoded. + * This will allow getPixels() to fill the uninitialized memory. + */ + virtual Result onGetPixels(const SkImageInfo& info, + void* pixels, size_t rowBytes, const Options&, + int* rowsDecoded) = 0; + + virtual bool onQueryYUVAInfo(const SkYUVAPixmapInfo::SupportedDataTypes&, + SkYUVAPixmapInfo*) const { return false; } + + virtual Result onGetYUVAPlanes(const SkYUVAPixmaps&) { return kUnimplemented; } + + virtual bool onGetValidSubset(SkIRect* /*desiredSubset*/) const { + // By default, subsets are not supported. + return false; + } + + /** + * If the stream was previously read, attempt to rewind. + * + * If the stream needed to be rewound, call onRewind. + * @returns true if the codec is at the right position and can be used. + * false if there was a failure to rewind. + * + * This is called by getPixels(), getYUV8Planes(), startIncrementalDecode() and + * startScanlineDecode(). Subclasses may call if they need to rewind at another time. + */ + bool SK_WARN_UNUSED_RESULT rewindIfNeeded(); + + /** + * Called by rewindIfNeeded, if the stream needed to be rewound. + * + * Subclasses should do any set up needed after a rewind. + */ + virtual bool onRewind() { + return true; + } + + /** + * Get method for the input stream + */ + SkStream* stream() { + return fStream.get(); + } + + /** + * The remaining functions revolve around decoding scanlines. + */ + + /** + * Most images types will be kTopDown and will not need to override this function. + */ + virtual SkScanlineOrder onGetScanlineOrder() const { return kTopDown_SkScanlineOrder; } + + const SkImageInfo& dstInfo() const { return fDstInfo; } + + const Options& options() const { return fOptions; } + + /** + * Returns the number of scanlines that have been decoded so far. + * This is unaffected by the SkScanlineOrder. + * + * Returns -1 if we have not started a scanline decode. + */ + int currScanline() const { return fCurrScanline; } + + virtual int onOutputScanline(int inputScanline) const; + + /** + * Return whether we can convert to dst. + * + * Will be called for the appropriate frame, prior to initializing the colorXform. + */ + virtual bool conversionSupported(const SkImageInfo& dst, bool srcIsOpaque, + bool needsColorXform); + + // Some classes never need a colorXform e.g. + // - ICO uses its embedded codec's colorXform + // - WBMP is just Black/White + virtual bool usesColorXform() const { return true; } + void applyColorXform(void* dst, const void* src, int count) const; + + bool colorXform() const { return fXformTime != kNo_XformTime; } + bool xformOnDecode() const { return fXformTime == kDecodeRow_XformTime; } + + virtual int onGetFrameCount() { + return 1; + } + + virtual bool onGetFrameInfo(int, FrameInfo*) const { + return false; + } + + virtual int onGetRepetitionCount() { + return 0; + } + +private: + const SkEncodedInfo fEncodedInfo; + XformFormat fSrcXformFormat; + std::unique_ptr fStream; + bool fNeedsRewind = false; + const SkEncodedOrigin fOrigin; + + SkImageInfo fDstInfo; + Options fOptions; + + enum XformTime { + kNo_XformTime, + kPalette_XformTime, + kDecodeRow_XformTime, + }; + XformTime fXformTime; + XformFormat fDstXformFormat; // Based on fDstInfo. + skcms_ICCProfile fDstProfile; + skcms_AlphaFormat fDstXformAlphaFormat; + + // Only meaningful during scanline decodes. + int fCurrScanline = -1; + + bool fStartedIncrementalDecode = false; + + // Allows SkAndroidCodec to call handleFrameIndex (potentially decoding a prior frame and + // clearing to transparent) without SkCodec itself calling it, too. + bool fUsingCallbackForHandleFrameIndex = false; + + bool initializeColorXform(const SkImageInfo& dstInfo, SkEncodedInfo::Alpha, bool srcIsOpaque); + + /** + * Return whether these dimensions are supported as a scale. + * + * The codec may choose to cache the information about scale and subset. + * Either way, the same information will be passed to onGetPixels/onStart + * on success. + * + * This must return true for a size returned from getScaledDimensions. + */ + bool dimensionsSupported(const SkISize& dim) { + return dim == this->dimensions() || this->onDimensionsSupported(dim); + } + + /** + * For multi-framed images, return the object with information about the frames. + */ + virtual const SkFrameHolder* getFrameHolder() const { + return nullptr; + } + + // Callback for decoding a prior frame. The `Options::fFrameIndex` is ignored, + // being replaced by frameIndex. This allows opts to actually be a subclass of + // SkCodec::Options which SkCodec itself does not know how to copy or modify, + // but just passes through to the caller (where it can be reinterpret_cast'd). + using GetPixelsCallback = std::function; + + /** + * Check for a valid Options.fFrameIndex, and decode prior frames if necessary. + * + * If GetPixelsCallback is not null, it will be used to decode a prior frame instead + * of using this SkCodec directly. It may also be used recursively, if that in turn + * depends on a prior frame. This is used by SkAndroidCodec. + */ + Result handleFrameIndex(const SkImageInfo&, void* pixels, size_t rowBytes, const Options&, + GetPixelsCallback = nullptr); + + // Methods for scanline decoding. + virtual Result onStartScanlineDecode(const SkImageInfo& /*dstInfo*/, + const Options& /*options*/) { + return kUnimplemented; + } + + virtual Result onStartIncrementalDecode(const SkImageInfo& /*dstInfo*/, void*, size_t, + const Options&) { + return kUnimplemented; + } + + virtual Result onIncrementalDecode(int*) { + return kUnimplemented; + } + + + virtual bool onSkipScanlines(int /*countLines*/) { return false; } + + virtual int onGetScanlines(void* /*dst*/, int /*countLines*/, size_t /*rowBytes*/) { return 0; } + + /** + * On an incomplete decode, getPixels() and getScanlines() will call this function + * to fill any uinitialized memory. + * + * @param dstInfo Contains the destination color type + * Contains the destination alpha type + * Contains the destination width + * The height stored in this info is unused + * @param dst Pointer to the start of destination pixel memory + * @param rowBytes Stride length in destination pixel memory + * @param zeroInit Indicates if memory is zero initialized + * @param linesRequested Number of lines that the client requested + * @param linesDecoded Number of lines that were successfully decoded + */ + void fillIncompleteImage(const SkImageInfo& dstInfo, void* dst, size_t rowBytes, + ZeroInitialized zeroInit, int linesRequested, int linesDecoded); + + /** + * Return an object which will allow forcing scanline decodes to sample in X. + * + * May create a sampler, if one is not currently being used. Otherwise, does + * not affect ownership. + * + * Only valid during scanline decoding or incremental decoding. + */ + virtual SkSampler* getSampler(bool /*createIfNecessary*/) { return nullptr; } + + friend class DM::CodecSrc; // for fillIncompleteImage + friend class SkSampledCodec; + friend class SkIcoCodec; + friend class SkAndroidCodec; // for fEncodedInfo +}; +#endif // SkCodec_DEFINED diff --git a/gfx/skia/skia/include/codec/SkCodecAnimation.h b/gfx/skia/skia/include/codec/SkCodecAnimation.h new file mode 100644 index 0000000000..c5883e2af2 --- /dev/null +++ b/gfx/skia/skia/include/codec/SkCodecAnimation.h @@ -0,0 +1,61 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCodecAnimation_DEFINED +#define SkCodecAnimation_DEFINED + +namespace SkCodecAnimation { + /** + * This specifies how the next frame is based on this frame. + * + * Names are based on the GIF 89a spec. + * + * The numbers correspond to values in a GIF. + */ + enum class DisposalMethod { + /** + * The next frame should be drawn on top of this one. + * + * In a GIF, a value of 0 (not specified) is also treated as Keep. + */ + kKeep = 1, + + /** + * Similar to Keep, except the area inside this frame's rectangle + * should be cleared to the BackGround color (transparent) before + * drawing the next frame. + */ + kRestoreBGColor = 2, + + /** + * The next frame should be drawn on top of the previous frame - i.e. + * disregarding this one. + * + * In a GIF, a value of 4 is also treated as RestorePrevious. + */ + kRestorePrevious = 3, + }; + + /** + * How to blend the current frame. + */ + enum class Blend { + /** + * Blend with the prior frame as if using SkBlendMode::kSrcOver. + */ + kSrcOver, + + /** + * Blend with the prior frame as if using SkBlendMode::kSrc. + * + * This frame's pixels replace the destination pixels. + */ + kSrc, + }; + +} // namespace SkCodecAnimation +#endif // SkCodecAnimation_DEFINED diff --git a/gfx/skia/skia/include/codec/SkEncodedImageFormat.h b/gfx/skia/skia/include/codec/SkEncodedImageFormat.h new file mode 100644 index 0000000000..99ca44e765 --- /dev/null +++ b/gfx/skia/skia/include/codec/SkEncodedImageFormat.h @@ -0,0 +1,36 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEncodedImageFormat_DEFINED +#define SkEncodedImageFormat_DEFINED + +#include + +/** + * Enum describing format of encoded data. + */ +enum class SkEncodedImageFormat { +#ifdef SK_BUILD_FOR_GOOGLE3 + kUnknown, +#endif + kBMP, + kGIF, + kICO, + kJPEG, + kPNG, + kWBMP, + kWEBP, + kPKM, + kKTX, + kASTC, + kDNG, + kHEIF, + kAVIF, + kJPEGXL, +}; + +#endif // SkEncodedImageFormat_DEFINED diff --git a/gfx/skia/skia/include/codec/SkEncodedOrigin.h b/gfx/skia/skia/include/codec/SkEncodedOrigin.h new file mode 100644 index 0000000000..19d083672f --- /dev/null +++ b/gfx/skia/skia/include/codec/SkEncodedOrigin.h @@ -0,0 +1,54 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEncodedOrigin_DEFINED +#define SkEncodedOrigin_DEFINED + +#include "include/core/SkMatrix.h" + +// These values match the orientation www.exif.org/Exif2-2.PDF. +enum SkEncodedOrigin { + kTopLeft_SkEncodedOrigin = 1, // Default + kTopRight_SkEncodedOrigin = 2, // Reflected across y-axis + kBottomRight_SkEncodedOrigin = 3, // Rotated 180 + kBottomLeft_SkEncodedOrigin = 4, // Reflected across x-axis + kLeftTop_SkEncodedOrigin = 5, // Reflected across x-axis, Rotated 90 CCW + kRightTop_SkEncodedOrigin = 6, // Rotated 90 CW + kRightBottom_SkEncodedOrigin = 7, // Reflected across x-axis, Rotated 90 CW + kLeftBottom_SkEncodedOrigin = 8, // Rotated 90 CCW + kDefault_SkEncodedOrigin = kTopLeft_SkEncodedOrigin, + kLast_SkEncodedOrigin = kLeftBottom_SkEncodedOrigin, +}; + +/** + * Given an encoded origin and the width and height of the source data, returns a matrix + * that transforms the source rectangle with upper left corner at [0, 0] and origin to a correctly + * oriented destination rectangle of [0, 0, w, h]. + */ +static inline SkMatrix SkEncodedOriginToMatrix(SkEncodedOrigin origin, int w, int h) { + switch (origin) { + case kTopLeft_SkEncodedOrigin: return SkMatrix::I(); + case kTopRight_SkEncodedOrigin: return SkMatrix::MakeAll(-1, 0, w, 0, 1, 0, 0, 0, 1); + case kBottomRight_SkEncodedOrigin: return SkMatrix::MakeAll(-1, 0, w, 0, -1, h, 0, 0, 1); + case kBottomLeft_SkEncodedOrigin: return SkMatrix::MakeAll( 1, 0, 0, 0, -1, h, 0, 0, 1); + case kLeftTop_SkEncodedOrigin: return SkMatrix::MakeAll( 0, 1, 0, 1, 0, 0, 0, 0, 1); + case kRightTop_SkEncodedOrigin: return SkMatrix::MakeAll( 0, -1, w, 1, 0, 0, 0, 0, 1); + case kRightBottom_SkEncodedOrigin: return SkMatrix::MakeAll( 0, -1, w, -1, 0, h, 0, 0, 1); + case kLeftBottom_SkEncodedOrigin: return SkMatrix::MakeAll( 0, 1, 0, -1, 0, h, 0, 0, 1); + } + SK_ABORT("Unexpected origin"); +} + +/** + * Return true if the encoded origin includes a 90 degree rotation, in which case the width + * and height of the source data are swapped relative to a correctly oriented destination. + */ +static inline bool SkEncodedOriginSwapsWidthHeight(SkEncodedOrigin origin) { + return origin >= kLeftTop_SkEncodedOrigin; +} + +#endif // SkEncodedOrigin_DEFINED diff --git a/gfx/skia/skia/include/codec/SkPngChunkReader.h b/gfx/skia/skia/include/codec/SkPngChunkReader.h new file mode 100644 index 0000000000..0ee8a9ecc7 --- /dev/null +++ b/gfx/skia/skia/include/codec/SkPngChunkReader.h @@ -0,0 +1,45 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPngChunkReader_DEFINED +#define SkPngChunkReader_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +/** + * SkPngChunkReader + * + * Base class for optional callbacks to retrieve meta/chunk data out of a PNG + * encoded image as it is being decoded. + * Used by SkCodec. + */ +class SkPngChunkReader : public SkRefCnt { +public: + /** + * This will be called by the decoder when it sees an unknown chunk. + * + * Use by SkCodec: + * Depending on the location of the unknown chunks, this callback may be + * called by + * - the factory (NewFromStream/NewFromData) + * - getPixels + * - startScanlineDecode + * - the first call to getScanlines/skipScanlines + * The callback may be called from a different thread (e.g. if the SkCodec + * is passed to another thread), and it may be called multiple times, if + * the SkCodec is used multiple times. + * + * @param tag Name for this type of chunk. + * @param data Data to be interpreted by the subclass. + * @param length Number of bytes of data in the chunk. + * @return true to continue decoding, or false to indicate an error, which + * will cause the decoder to not return the image. + */ + virtual bool readChunk(const char tag[], const void* data, size_t length) = 0; +}; +#endif // SkPngChunkReader_DEFINED diff --git a/gfx/skia/skia/include/config/SkUserConfig.h b/gfx/skia/skia/include/config/SkUserConfig.h new file mode 100644 index 0000000000..96aaad59ae --- /dev/null +++ b/gfx/skia/skia/include/config/SkUserConfig.h @@ -0,0 +1,152 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkUserConfig_DEFINED +#define SkUserConfig_DEFINED + +/* SkTypes.h, the root of the public header files, includes this file + SkUserConfig.h after first initializing certain Skia defines, letting + this file change or augment those flags. + + Below are optional defines that add, subtract, or change default behavior + in Skia. Your port can locally edit this file to enable/disable flags as + you choose, or these can be declared on your command line (i.e. -Dfoo). + + By default, this #include file will always default to having all the flags + commented out, so including it will have no effect. +*/ + +/////////////////////////////////////////////////////////////////////////////// + +/* Skia has lots of debug-only code. Often this is just null checks or other + parameter checking, but sometimes it can be quite intrusive (e.g. check that + each 32bit pixel is in premultiplied form). This code can be very useful + during development, but will slow things down in a shipping product. + + By default, these mutually exclusive flags are defined in SkTypes.h, + based on the presence or absence of NDEBUG, but that decision can be changed + here. +*/ +//#define SK_DEBUG +//#define SK_RELEASE + +/* To write debug messages to a console, skia will call SkDebugf(...) following + printf conventions (e.g. const char* format, ...). If you want to redirect + this to something other than printf, define yours here +*/ +//#define SkDebugf(...) MyFunction(__VA_ARGS__) + +/* Skia has both debug and release asserts. When an assert fails SK_ABORT will + be used to report an abort message. SK_ABORT is expected not to return. Skia + provides a default implementation which will print the message with SkDebugf + and then call sk_abort_no_print. +*/ +//#define SK_ABORT(message, ...) + +/* To specify a different default font strike cache memory limit, define this. If this is + undefined, skia will use a built-in value. +*/ +//#define SK_DEFAULT_FONT_CACHE_LIMIT (1024 * 1024) + +/* To specify a different default font strike cache count limit, define this. If this is + undefined, skia will use a built-in value. +*/ +// #define SK_DEFAULT_FONT_CACHE_COUNT_LIMIT 2048 + +/* To specify the default size of the image cache, undefine this and set it to + the desired value (in bytes). SkGraphics.h as a runtime API to set this + value as well. If this is undefined, a built-in value will be used. +*/ +//#define SK_DEFAULT_IMAGE_CACHE_LIMIT (1024 * 1024) + +/* Define this to set the upper limit for text to support LCD. Values that + are very large increase the cost in the font cache and draw slower, without + improving readability. If this is undefined, Skia will use its default + value (e.g. 48) +*/ +//#define SK_MAX_SIZE_FOR_LCDTEXT 48 + +/* Change the kN32_SkColorType ordering to BGRA to work in X windows. +*/ +//#define SK_R32_SHIFT 16 + +/* Determines whether to build code that supports the Ganesh GPU backend. Some classes + that are not GPU-specific, such as SkShader subclasses, have optional code + that is used allows them to interact with this GPU backend. If you'd like to + include this code, include -DSK_GANESH in your cflags or uncomment below. + Defaults to not set (No Ganesh GPU backend). + This define affects the ABI of Skia, so make sure it matches the client which uses + the compiled version of Skia. +*/ +//#define SK_GANESH + +/* Skia makes use of histogram logging macros to trace the frequency of + events. By default, Skia provides no-op versions of these macros. + Skia consumers can provide their own definitions of these macros to + integrate with their histogram collection backend. +*/ +//#define SK_HISTOGRAM_BOOLEAN(name, sample) +//#define SK_HISTOGRAM_ENUMERATION(name, sample, enum_size) +//#define SK_HISTOGRAM_EXACT_LINEAR(name, sample, value_max) +//#define SK_HISTOGRAM_MEMORY_KB(name, sample) + +/* Skia tries to make use of some non-standard C++ language extensions. + By default, Skia provides msvc and clang/gcc versions of these macros. + Skia consumers can provide their own definitions of these macros to + integrate with their own compilers and build system. +*/ +//#define SK_UNUSED [[maybe_unused]] +//#define SK_WARN_UNUSED_RESULT [[nodiscard]] +//#define SK_ALWAYS_INLINE inline __attribute__((always_inline)) +//#define SK_NEVER_INLINE __attribute__((noinline)) +//#define SK_PRINTF_LIKE(A, B) __attribute__((format(printf, (A), (B)))) +//#define SK_NO_SANITIZE(A) __attribute__((no_sanitize(A))) +//#define SK_TRIVIAL_ABI [[clang::trivial_abi]] + +/* + * If compiling Skia as a DLL, public APIs should be exported. Skia will set + * SK_API to something sensible for Clang and MSVC, but if clients need to + * customize it for their build system or compiler, they may. + * If a client needs to use SK_API (e.g. overriding SK_ABORT), then they + * *must* define their own, the default will not be defined prior to loading + * this file. + */ +//#define SK_API __declspec(dllexport) + +#define MOZ_SKIA + +// On all platforms we have this byte order +#define SK_A32_SHIFT 24 +#define SK_R32_SHIFT 16 +#define SK_G32_SHIFT 8 +#define SK_B32_SHIFT 0 + +#define SK_ALLOW_STATIC_GLOBAL_INITIALIZERS 0 + +#define SK_RASTERIZE_EVEN_ROUNDING + +#define I_ACKNOWLEDGE_SKIA_DOES_NOT_SUPPORT_BIG_ENDIAN + +#define SK_SUPPORT_GPU 0 + +#define SK_DISABLE_SLOW_DEBUG_VALIDATION 1 + +#define SK_DISABLE_TYPEFACE_CACHE + +#define SK_USE_FREETYPE_EMBOLDEN + +#define SK_IGNORE_MAC_BLENDING_MATCH_FIX + +#ifndef MOZ_IMPLICIT +# ifdef MOZ_CLANG_PLUGIN +# define MOZ_IMPLICIT __attribute__((annotate("moz_implicit"))) +# else +# define MOZ_IMPLICIT +# endif +#endif + +#endif diff --git a/gfx/skia/skia/include/core/SkAlphaType.h b/gfx/skia/skia/include/core/SkAlphaType.h new file mode 100644 index 0000000000..0c99906dfd --- /dev/null +++ b/gfx/skia/skia/include/core/SkAlphaType.h @@ -0,0 +1,45 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAlphaType_DEFINED +#define SkAlphaType_DEFINED + +/** \enum SkAlphaType + Describes how to interpret the alpha component of a pixel. A pixel may + be opaque, or alpha, describing multiple levels of transparency. + + In simple blending, alpha weights the draw color and the destination + color to create a new color. If alpha describes a weight from zero to one: + + new color = draw color * alpha + destination color * (1 - alpha) + + In practice alpha is encoded in two or more bits, where 1.0 equals all bits set. + + RGB may have alpha included in each component value; the stored + value is the original RGB multiplied by alpha. Premultiplied color + components improve performance. +*/ +enum SkAlphaType : int { + kUnknown_SkAlphaType, //!< uninitialized + kOpaque_SkAlphaType, //!< pixel is opaque + kPremul_SkAlphaType, //!< pixel components are premultiplied by alpha + kUnpremul_SkAlphaType, //!< pixel components are independent of alpha + kLastEnum_SkAlphaType = kUnpremul_SkAlphaType, //!< last valid value +}; + +/** Returns true if SkAlphaType equals kOpaque_SkAlphaType. + + kOpaque_SkAlphaType is a hint that the SkColorType is opaque, or that all + alpha values are set to their 1.0 equivalent. If SkAlphaType is + kOpaque_SkAlphaType, and SkColorType is not opaque, then the result of + drawing any pixel with a alpha value less than 1.0 is undefined. +*/ +static inline bool SkAlphaTypeIsOpaque(SkAlphaType at) { + return kOpaque_SkAlphaType == at; +} + +#endif diff --git a/gfx/skia/skia/include/core/SkAnnotation.h b/gfx/skia/skia/include/core/SkAnnotation.h new file mode 100644 index 0000000000..2006f309e9 --- /dev/null +++ b/gfx/skia/skia/include/core/SkAnnotation.h @@ -0,0 +1,52 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAnnotation_DEFINED +#define SkAnnotation_DEFINED + +#include "include/core/SkTypes.h" + +class SkData; +struct SkPoint; +struct SkRect; +class SkCanvas; + +/** + * Annotate the canvas by associating the specified URL with the + * specified rectangle (in local coordinates, just like drawRect). + * + * The URL is expected to be escaped and be valid 7-bit ASCII. + * + * If the backend of this canvas does not support annotations, this call is + * safely ignored. + * + * The caller is responsible for managing its ownership of the SkData. + */ +SK_API void SkAnnotateRectWithURL(SkCanvas*, const SkRect&, SkData*); + +/** + * Annotate the canvas by associating a name with the specified point. + * + * If the backend of this canvas does not support annotations, this call is + * safely ignored. + * + * The caller is responsible for managing its ownership of the SkData. + */ +SK_API void SkAnnotateNamedDestination(SkCanvas*, const SkPoint&, SkData*); + +/** + * Annotate the canvas by making the specified rectangle link to a named + * destination. + * + * If the backend of this canvas does not support annotations, this call is + * safely ignored. + * + * The caller is responsible for managing its ownership of the SkData. + */ +SK_API void SkAnnotateLinkToDestination(SkCanvas*, const SkRect&, SkData*); + +#endif diff --git a/gfx/skia/skia/include/core/SkBBHFactory.h b/gfx/skia/skia/include/core/SkBBHFactory.h new file mode 100644 index 0000000000..2507d0f150 --- /dev/null +++ b/gfx/skia/skia/include/core/SkBBHFactory.h @@ -0,0 +1,63 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBBHFactory_DEFINED +#define SkBBHFactory_DEFINED + +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include + +class SkBBoxHierarchy : public SkRefCnt { +public: + struct Metadata { + bool isDraw; // The corresponding SkRect bounds a draw command, not a pure state change. + }; + + /** + * Insert N bounding boxes into the hierarchy. + */ + virtual void insert(const SkRect[], int N) = 0; + virtual void insert(const SkRect[], const Metadata[], int N); + + /** + * Populate results with the indices of bounding boxes intersecting that query. + */ + virtual void search(const SkRect& query, std::vector* results) const = 0; + + /** + * Return approximate size in memory of *this. + */ + virtual size_t bytesUsed() const = 0; + +protected: + SkBBoxHierarchy() = default; + SkBBoxHierarchy(const SkBBoxHierarchy&) = delete; + SkBBoxHierarchy& operator=(const SkBBoxHierarchy&) = delete; +}; + +class SK_API SkBBHFactory { +public: + /** + * Allocate a new SkBBoxHierarchy. Return NULL on failure. + */ + virtual sk_sp operator()() const = 0; + virtual ~SkBBHFactory() {} + +protected: + SkBBHFactory() = default; + SkBBHFactory(const SkBBHFactory&) = delete; + SkBBHFactory& operator=(const SkBBHFactory&) = delete; +}; + +class SK_API SkRTreeFactory : public SkBBHFactory { +public: + sk_sp operator()() const override; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkBitmap.h b/gfx/skia/skia/include/core/SkBitmap.h new file mode 100644 index 0000000000..d843643ca7 --- /dev/null +++ b/gfx/skia/skia/include/core/SkBitmap.h @@ -0,0 +1,1268 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBitmap_DEFINED +#define SkBitmap_DEFINED + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColor.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkDebug.h" + +#include +#include + +class SkColorSpace; +class SkImage; +class SkMatrix; +class SkMipmap; +class SkPaint; +class SkPixelRef; +class SkShader; +enum SkColorType : int; +enum class SkTileMode; +struct SkMask; + +/** \class SkBitmap + SkBitmap describes a two-dimensional raster pixel array. SkBitmap is built on + SkImageInfo, containing integer width and height, SkColorType and SkAlphaType + describing the pixel format, and SkColorSpace describing the range of colors. + SkBitmap points to SkPixelRef, which describes the physical array of pixels. + SkImageInfo bounds may be located anywhere fully inside SkPixelRef bounds. + + SkBitmap can be drawn using SkCanvas. SkBitmap can be a drawing destination for SkCanvas + draw member functions. SkBitmap flexibility as a pixel container limits some + optimizations available to the target platform. + + If pixel array is primarily read-only, use SkImage for better performance. + If pixel array is primarily written to, use SkSurface for better performance. + + Declaring SkBitmap const prevents altering SkImageInfo: the SkBitmap height, width, + and so on cannot change. It does not affect SkPixelRef: a caller may write its + pixels. Declaring SkBitmap const affects SkBitmap configuration, not its contents. + + SkBitmap is not thread safe. Each thread must have its own copy of SkBitmap fields, + although threads may share the underlying pixel array. +*/ +class SK_API SkBitmap { +public: + class SK_API Allocator; + + /** Creates an empty SkBitmap without pixels, with kUnknown_SkColorType, + kUnknown_SkAlphaType, and with a width and height of zero. SkPixelRef origin is + set to (0, 0). + + Use setInfo() to associate SkColorType, SkAlphaType, width, and height + after SkBitmap has been created. + + @return empty SkBitmap + + example: https://fiddle.skia.org/c/@Bitmap_empty_constructor + */ + SkBitmap(); + + /** Copies settings from src to returned SkBitmap. Shares pixels if src has pixels + allocated, so both bitmaps reference the same pixels. + + @param src SkBitmap to copy SkImageInfo, and share SkPixelRef + @return copy of src + + example: https://fiddle.skia.org/c/@Bitmap_copy_const_SkBitmap + */ + SkBitmap(const SkBitmap& src); + + /** Copies settings from src to returned SkBitmap. Moves ownership of src pixels to + SkBitmap. + + @param src SkBitmap to copy SkImageInfo, and reassign SkPixelRef + @return copy of src + + example: https://fiddle.skia.org/c/@Bitmap_move_SkBitmap + */ + SkBitmap(SkBitmap&& src); + + /** Decrements SkPixelRef reference count, if SkPixelRef is not nullptr. + */ + ~SkBitmap(); + + /** Copies settings from src to returned SkBitmap. Shares pixels if src has pixels + allocated, so both bitmaps reference the same pixels. + + @param src SkBitmap to copy SkImageInfo, and share SkPixelRef + @return copy of src + + example: https://fiddle.skia.org/c/@Bitmap_copy_operator + */ + SkBitmap& operator=(const SkBitmap& src); + + /** Copies settings from src to returned SkBitmap. Moves ownership of src pixels to + SkBitmap. + + @param src SkBitmap to copy SkImageInfo, and reassign SkPixelRef + @return copy of src + + example: https://fiddle.skia.org/c/@Bitmap_move_operator + */ + SkBitmap& operator=(SkBitmap&& src); + + /** Swaps the fields of the two bitmaps. + + @param other SkBitmap exchanged with original + + example: https://fiddle.skia.org/c/@Bitmap_swap + */ + void swap(SkBitmap& other); + + /** Returns a constant reference to the SkPixmap holding the SkBitmap pixel + address, row bytes, and SkImageInfo. + + @return reference to SkPixmap describing this SkBitmap + */ + const SkPixmap& pixmap() const { return fPixmap; } + + /** Returns width, height, SkAlphaType, SkColorType, and SkColorSpace. + + @return reference to SkImageInfo + */ + const SkImageInfo& info() const { return fPixmap.info(); } + + /** Returns pixel count in each row. Should be equal or less than + rowBytes() / info().bytesPerPixel(). + + May be less than pixelRef().width(). Will not exceed pixelRef().width() less + pixelRefOrigin().fX. + + @return pixel width in SkImageInfo + */ + int width() const { return fPixmap.width(); } + + /** Returns pixel row count. + + Maybe be less than pixelRef().height(). Will not exceed pixelRef().height() less + pixelRefOrigin().fY. + + @return pixel height in SkImageInfo + */ + int height() const { return fPixmap.height(); } + + SkColorType colorType() const { return fPixmap.colorType(); } + + SkAlphaType alphaType() const { return fPixmap.alphaType(); } + + /** Returns SkColorSpace, the range of colors, associated with SkImageInfo. The + reference count of SkColorSpace is unchanged. The returned SkColorSpace is + immutable. + + @return SkColorSpace in SkImageInfo, or nullptr + */ + SkColorSpace* colorSpace() const; + + /** Returns smart pointer to SkColorSpace, the range of colors, associated with + SkImageInfo. The smart pointer tracks the number of objects sharing this + SkColorSpace reference so the memory is released when the owners destruct. + + The returned SkColorSpace is immutable. + + @return SkColorSpace in SkImageInfo wrapped in a smart pointer + */ + sk_sp refColorSpace() const; + + /** Returns number of bytes per pixel required by SkColorType. + Returns zero if colorType( is kUnknown_SkColorType. + + @return bytes in pixel + */ + int bytesPerPixel() const { return fPixmap.info().bytesPerPixel(); } + + /** Returns number of pixels that fit on row. Should be greater than or equal to + width(). + + @return maximum pixels per row + */ + int rowBytesAsPixels() const { return fPixmap.rowBytesAsPixels(); } + + /** Returns bit shift converting row bytes to row pixels. + Returns zero for kUnknown_SkColorType. + + @return one of: 0, 1, 2, 3; left shift to convert pixels to bytes + */ + int shiftPerPixel() const { return fPixmap.shiftPerPixel(); } + + /** Returns true if either width() or height() are zero. + + Does not check if SkPixelRef is nullptr; call drawsNothing() to check width(), + height(), and SkPixelRef. + + @return true if dimensions do not enclose area + */ + bool empty() const { return fPixmap.info().isEmpty(); } + + /** Returns true if SkPixelRef is nullptr. + + Does not check if width() or height() are zero; call drawsNothing() to check + width(), height(), and SkPixelRef. + + @return true if no SkPixelRef is associated + */ + bool isNull() const { return nullptr == fPixelRef; } + + /** Returns true if width() or height() are zero, or if SkPixelRef is nullptr. + If true, SkBitmap has no effect when drawn or drawn into. + + @return true if drawing has no effect + */ + bool drawsNothing() const { + return this->empty() || this->isNull(); + } + + /** Returns row bytes, the interval from one pixel row to the next. Row bytes + is at least as large as: width() * info().bytesPerPixel(). + + Returns zero if colorType() is kUnknown_SkColorType, or if row bytes supplied to + setInfo() is not large enough to hold a row of pixels. + + @return byte length of pixel row + */ + size_t rowBytes() const { return fPixmap.rowBytes(); } + + /** Sets SkAlphaType, if alphaType is compatible with SkColorType. + Returns true unless alphaType is kUnknown_SkAlphaType and current SkAlphaType + is not kUnknown_SkAlphaType. + + Returns true if SkColorType is kUnknown_SkColorType. alphaType is ignored, and + SkAlphaType remains kUnknown_SkAlphaType. + + Returns true if SkColorType is kRGB_565_SkColorType or kGray_8_SkColorType. + alphaType is ignored, and SkAlphaType remains kOpaque_SkAlphaType. + + If SkColorType is kARGB_4444_SkColorType, kRGBA_8888_SkColorType, + kBGRA_8888_SkColorType, or kRGBA_F16_SkColorType: returns true unless + alphaType is kUnknown_SkAlphaType and SkAlphaType is not kUnknown_SkAlphaType. + If SkAlphaType is kUnknown_SkAlphaType, alphaType is ignored. + + If SkColorType is kAlpha_8_SkColorType, returns true unless + alphaType is kUnknown_SkAlphaType and SkAlphaType is not kUnknown_SkAlphaType. + If SkAlphaType is kUnknown_SkAlphaType, alphaType is ignored. If alphaType is + kUnpremul_SkAlphaType, it is treated as kPremul_SkAlphaType. + + This changes SkAlphaType in SkPixelRef; all bitmaps sharing SkPixelRef + are affected. + + @return true if SkAlphaType is set + + example: https://fiddle.skia.org/c/@Bitmap_setAlphaType + */ + bool setAlphaType(SkAlphaType alphaType); + + /** Returns pixel address, the base address corresponding to the pixel origin. + + @return pixel address + */ + void* getPixels() const { return fPixmap.writable_addr(); } + + /** Returns minimum memory required for pixel storage. + Does not include unused memory on last row when rowBytesAsPixels() exceeds width(). + Returns SIZE_MAX if result does not fit in size_t. + Returns zero if height() or width() is 0. + Returns height() times rowBytes() if colorType() is kUnknown_SkColorType. + + @return size in bytes of image buffer + */ + size_t computeByteSize() const { return fPixmap.computeByteSize(); } + + /** Returns true if pixels can not change. + + Most immutable SkBitmap checks trigger an assert only on debug builds. + + @return true if pixels are immutable + + example: https://fiddle.skia.org/c/@Bitmap_isImmutable + */ + bool isImmutable() const; + + /** Sets internal flag to mark SkBitmap as immutable. Once set, pixels can not change. + Any other bitmap sharing the same SkPixelRef are also marked as immutable. + Once SkPixelRef is marked immutable, the setting cannot be cleared. + + Writing to immutable SkBitmap pixels triggers an assert on debug builds. + + example: https://fiddle.skia.org/c/@Bitmap_setImmutable + */ + void setImmutable(); + + /** Returns true if SkAlphaType is set to hint that all pixels are opaque; their + alpha value is implicitly or explicitly 1.0. If true, and all pixels are + not opaque, Skia may draw incorrectly. + + Does not check if SkColorType allows alpha, or if any pixel value has + transparency. + + @return true if SkImageInfo SkAlphaType is kOpaque_SkAlphaType + */ + bool isOpaque() const { + return SkAlphaTypeIsOpaque(this->alphaType()); + } + + /** Resets to its initial state; all fields are set to zero, as if SkBitmap had + been initialized by SkBitmap(). + + Sets width, height, row bytes to zero; pixel address to nullptr; SkColorType to + kUnknown_SkColorType; and SkAlphaType to kUnknown_SkAlphaType. + + If SkPixelRef is allocated, its reference count is decreased by one, releasing + its memory if SkBitmap is the sole owner. + + example: https://fiddle.skia.org/c/@Bitmap_reset + */ + void reset(); + + /** Returns true if all pixels are opaque. SkColorType determines how pixels + are encoded, and whether pixel describes alpha. Returns true for SkColorType + without alpha in each pixel; for other SkColorType, returns true if all + pixels have alpha values equivalent to 1.0 or greater. + + For SkColorType kRGB_565_SkColorType or kGray_8_SkColorType: always + returns true. For SkColorType kAlpha_8_SkColorType, kBGRA_8888_SkColorType, + kRGBA_8888_SkColorType: returns true if all pixel alpha values are 255. + For SkColorType kARGB_4444_SkColorType: returns true if all pixel alpha values are 15. + For kRGBA_F16_SkColorType: returns true if all pixel alpha values are 1.0 or + greater. + + Returns false for kUnknown_SkColorType. + + @param bm SkBitmap to check + @return true if all pixels have opaque values or SkColorType is opaque + */ + static bool ComputeIsOpaque(const SkBitmap& bm) { + return bm.pixmap().computeIsOpaque(); + } + + /** Returns SkRect { 0, 0, width(), height() }. + + @param bounds container for floating point rectangle + + example: https://fiddle.skia.org/c/@Bitmap_getBounds + */ + void getBounds(SkRect* bounds) const; + + /** Returns SkIRect { 0, 0, width(), height() }. + + @param bounds container for integral rectangle + + example: https://fiddle.skia.org/c/@Bitmap_getBounds_2 + */ + void getBounds(SkIRect* bounds) const; + + /** Returns SkIRect { 0, 0, width(), height() }. + + @return integral rectangle from origin to width() and height() + */ + SkIRect bounds() const { return fPixmap.info().bounds(); } + + /** Returns SkISize { width(), height() }. + + @return integral size of width() and height() + */ + SkISize dimensions() const { return fPixmap.info().dimensions(); } + + /** Returns the bounds of this bitmap, offset by its SkPixelRef origin. + + @return bounds within SkPixelRef bounds + */ + SkIRect getSubset() const { + SkIPoint origin = this->pixelRefOrigin(); + return SkIRect::MakeXYWH(origin.x(), origin.y(), this->width(), this->height()); + } + + /** Sets width, height, SkAlphaType, SkColorType, SkColorSpace, and optional + rowBytes. Frees pixels, and returns true if successful. + + imageInfo.alphaType() may be altered to a value permitted by imageInfo.colorSpace(). + If imageInfo.colorType() is kUnknown_SkColorType, imageInfo.alphaType() is + set to kUnknown_SkAlphaType. + If imageInfo.colorType() is kAlpha_8_SkColorType and imageInfo.alphaType() is + kUnpremul_SkAlphaType, imageInfo.alphaType() is replaced by kPremul_SkAlphaType. + If imageInfo.colorType() is kRGB_565_SkColorType or kGray_8_SkColorType, + imageInfo.alphaType() is set to kOpaque_SkAlphaType. + If imageInfo.colorType() is kARGB_4444_SkColorType, kRGBA_8888_SkColorType, + kBGRA_8888_SkColorType, or kRGBA_F16_SkColorType: imageInfo.alphaType() remains + unchanged. + + rowBytes must equal or exceed imageInfo.minRowBytes(). If imageInfo.colorSpace() is + kUnknown_SkColorType, rowBytes is ignored and treated as zero; for all other + SkColorSpace values, rowBytes of zero is treated as imageInfo.minRowBytes(). + + Calls reset() and returns false if: + - rowBytes exceeds 31 bits + - imageInfo.width() is negative + - imageInfo.height() is negative + - rowBytes is positive and less than imageInfo.width() times imageInfo.bytesPerPixel() + + @param imageInfo contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param rowBytes imageInfo.minRowBytes() or larger; or zero + @return true if SkImageInfo set successfully + + example: https://fiddle.skia.org/c/@Bitmap_setInfo + */ + bool setInfo(const SkImageInfo& imageInfo, size_t rowBytes = 0); + + /** \enum SkBitmap::AllocFlags + AllocFlags is obsolete. We always zero pixel memory when allocated. + */ + enum AllocFlags { + kZeroPixels_AllocFlag = 1 << 0, //!< zero pixel memory. No effect. This is the default. + }; + + /** Sets SkImageInfo to info following the rules in setInfo() and allocates pixel + memory. Memory is zeroed. + + Returns false and calls reset() if SkImageInfo could not be set, or memory could + not be allocated, or memory could not optionally be zeroed. + + On most platforms, allocating pixel memory may succeed even though there is + not sufficient memory to hold pixels; allocation does not take place + until the pixels are written to. The actual behavior depends on the platform + implementation of calloc(). + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param flags kZeroPixels_AllocFlag, or zero + @return true if pixels allocation is successful + */ + bool SK_WARN_UNUSED_RESULT tryAllocPixelsFlags(const SkImageInfo& info, uint32_t flags); + + /** Sets SkImageInfo to info following the rules in setInfo() and allocates pixel + memory. Memory is zeroed. + + Aborts execution if SkImageInfo could not be set, or memory could + not be allocated, or memory could not optionally + be zeroed. Abort steps may be provided by the user at compile time by defining + SK_ABORT. + + On most platforms, allocating pixel memory may succeed even though there is + not sufficient memory to hold pixels; allocation does not take place + until the pixels are written to. The actual behavior depends on the platform + implementation of calloc(). + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param flags kZeroPixels_AllocFlag, or zero + + example: https://fiddle.skia.org/c/@Bitmap_allocPixelsFlags + */ + void allocPixelsFlags(const SkImageInfo& info, uint32_t flags); + + /** Sets SkImageInfo to info following the rules in setInfo() and allocates pixel + memory. rowBytes must equal or exceed info.width() times info.bytesPerPixel(), + or equal zero. Pass in zero for rowBytes to compute the minimum valid value. + + Returns false and calls reset() if SkImageInfo could not be set, or memory could + not be allocated. + + On most platforms, allocating pixel memory may succeed even though there is + not sufficient memory to hold pixels; allocation does not take place + until the pixels are written to. The actual behavior depends on the platform + implementation of malloc(). + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param rowBytes size of pixel row or larger; may be zero + @return true if pixel storage is allocated + */ + bool SK_WARN_UNUSED_RESULT tryAllocPixels(const SkImageInfo& info, size_t rowBytes); + + /** Sets SkImageInfo to info following the rules in setInfo() and allocates pixel + memory. rowBytes must equal or exceed info.width() times info.bytesPerPixel(), + or equal zero. Pass in zero for rowBytes to compute the minimum valid value. + + Aborts execution if SkImageInfo could not be set, or memory could + not be allocated. Abort steps may be provided by + the user at compile time by defining SK_ABORT. + + On most platforms, allocating pixel memory may succeed even though there is + not sufficient memory to hold pixels; allocation does not take place + until the pixels are written to. The actual behavior depends on the platform + implementation of malloc(). + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param rowBytes size of pixel row or larger; may be zero + + example: https://fiddle.skia.org/c/@Bitmap_allocPixels + */ + void allocPixels(const SkImageInfo& info, size_t rowBytes); + + /** Sets SkImageInfo to info following the rules in setInfo() and allocates pixel + memory. + + Returns false and calls reset() if SkImageInfo could not be set, or memory could + not be allocated. + + On most platforms, allocating pixel memory may succeed even though there is + not sufficient memory to hold pixels; allocation does not take place + until the pixels are written to. The actual behavior depends on the platform + implementation of malloc(). + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @return true if pixel storage is allocated + */ + bool SK_WARN_UNUSED_RESULT tryAllocPixels(const SkImageInfo& info) { + return this->tryAllocPixels(info, info.minRowBytes()); + } + + /** Sets SkImageInfo to info following the rules in setInfo() and allocates pixel + memory. + + Aborts execution if SkImageInfo could not be set, or memory could + not be allocated. Abort steps may be provided by + the user at compile time by defining SK_ABORT. + + On most platforms, allocating pixel memory may succeed even though there is + not sufficient memory to hold pixels; allocation does not take place + until the pixels are written to. The actual behavior depends on the platform + implementation of malloc(). + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + + example: https://fiddle.skia.org/c/@Bitmap_allocPixels_2 + */ + void allocPixels(const SkImageInfo& info); + + /** Sets SkImageInfo to width, height, and native color type; and allocates + pixel memory. If isOpaque is true, sets SkImageInfo to kOpaque_SkAlphaType; + otherwise, sets to kPremul_SkAlphaType. + + Calls reset() and returns false if width exceeds 29 bits or is negative, + or height is negative. + + Returns false if allocation fails. + + Use to create SkBitmap that matches SkPMColor, the native pixel arrangement on + the platform. SkBitmap drawn to output device skips converting its pixel format. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @param isOpaque true if pixels do not have transparency + @return true if pixel storage is allocated + */ + bool SK_WARN_UNUSED_RESULT tryAllocN32Pixels(int width, int height, bool isOpaque = false); + + /** Sets SkImageInfo to width, height, and the native color type; and allocates + pixel memory. If isOpaque is true, sets SkImageInfo to kOpaque_SkAlphaType; + otherwise, sets to kPremul_SkAlphaType. + + Aborts if width exceeds 29 bits or is negative, or height is negative, or + allocation fails. Abort steps may be provided by the user at compile time by + defining SK_ABORT. + + Use to create SkBitmap that matches SkPMColor, the native pixel arrangement on + the platform. SkBitmap drawn to output device skips converting its pixel format. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @param isOpaque true if pixels do not have transparency + + example: https://fiddle.skia.org/c/@Bitmap_allocN32Pixels + */ + void allocN32Pixels(int width, int height, bool isOpaque = false); + + /** Sets SkImageInfo to info following the rules in setInfo(), and creates SkPixelRef + containing pixels and rowBytes. releaseProc, if not nullptr, is called + immediately on failure or when pixels are no longer referenced. context may be + nullptr. + + If SkImageInfo could not be set, or rowBytes is less than info.minRowBytes(): + calls releaseProc if present, calls reset(), and returns false. + + Otherwise, if pixels equals nullptr: sets SkImageInfo, calls releaseProc if + present, returns true. + + If SkImageInfo is set, pixels is not nullptr, and releaseProc is not nullptr: + when pixels are no longer referenced, calls releaseProc with pixels and context + as parameters. + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param pixels address or pixel storage; may be nullptr + @param rowBytes size of pixel row or larger + @param releaseProc function called when pixels can be deleted; may be nullptr + @param context caller state passed to releaseProc; may be nullptr + @return true if SkImageInfo is set to info + */ + bool installPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + void (*releaseProc)(void* addr, void* context), void* context); + + /** Sets SkImageInfo to info following the rules in setInfo(), and creates SkPixelRef + containing pixels and rowBytes. + + If SkImageInfo could not be set, or rowBytes is less than info.minRowBytes(): + calls reset(), and returns false. + + Otherwise, if pixels equals nullptr: sets SkImageInfo, returns true. + + Caller must ensure that pixels are valid for the lifetime of SkBitmap and SkPixelRef. + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param pixels address or pixel storage; may be nullptr + @param rowBytes size of pixel row or larger + @return true if SkImageInfo is set to info + */ + bool installPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) { + return this->installPixels(info, pixels, rowBytes, nullptr, nullptr); + } + + /** Sets SkImageInfo to pixmap.info() following the rules in setInfo(), and creates + SkPixelRef containing pixmap.addr() and pixmap.rowBytes(). + + If SkImageInfo could not be set, or pixmap.rowBytes() is less than + SkImageInfo::minRowBytes(): calls reset(), and returns false. + + Otherwise, if pixmap.addr() equals nullptr: sets SkImageInfo, returns true. + + Caller must ensure that pixmap is valid for the lifetime of SkBitmap and SkPixelRef. + + @param pixmap SkImageInfo, pixel address, and rowBytes() + @return true if SkImageInfo was set to pixmap.info() + + example: https://fiddle.skia.org/c/@Bitmap_installPixels_3 + */ + bool installPixels(const SkPixmap& pixmap); + + /** Deprecated. + */ + bool installMaskPixels(const SkMask& mask); + + /** Replaces SkPixelRef with pixels, preserving SkImageInfo and rowBytes(). + Sets SkPixelRef origin to (0, 0). + + If pixels is nullptr, or if info().colorType() equals kUnknown_SkColorType; + release reference to SkPixelRef, and set SkPixelRef to nullptr. + + Caller is responsible for handling ownership pixel memory for the lifetime + of SkBitmap and SkPixelRef. + + @param pixels address of pixel storage, managed by caller + + example: https://fiddle.skia.org/c/@Bitmap_setPixels + */ + void setPixels(void* pixels); + + /** Allocates pixel memory with HeapAllocator, and replaces existing SkPixelRef. + The allocation size is determined by SkImageInfo width, height, and SkColorType. + + Returns false if info().colorType() is kUnknown_SkColorType, or allocation fails. + + @return true if the allocation succeeds + */ + bool SK_WARN_UNUSED_RESULT tryAllocPixels() { + return this->tryAllocPixels((Allocator*)nullptr); + } + + /** Allocates pixel memory with HeapAllocator, and replaces existing SkPixelRef. + The allocation size is determined by SkImageInfo width, height, and SkColorType. + + Aborts if info().colorType() is kUnknown_SkColorType, or allocation fails. + Abort steps may be provided by the user at compile + time by defining SK_ABORT. + + example: https://fiddle.skia.org/c/@Bitmap_allocPixels_3 + */ + void allocPixels(); + + /** Allocates pixel memory with allocator, and replaces existing SkPixelRef. + The allocation size is determined by SkImageInfo width, height, and SkColorType. + If allocator is nullptr, use HeapAllocator instead. + + Returns false if Allocator::allocPixelRef return false. + + @param allocator instance of SkBitmap::Allocator instantiation + @return true if custom allocator reports success + */ + bool SK_WARN_UNUSED_RESULT tryAllocPixels(Allocator* allocator); + + /** Allocates pixel memory with allocator, and replaces existing SkPixelRef. + The allocation size is determined by SkImageInfo width, height, and SkColorType. + If allocator is nullptr, use HeapAllocator instead. + + Aborts if Allocator::allocPixelRef return false. Abort steps may be provided by + the user at compile time by defining SK_ABORT. + + @param allocator instance of SkBitmap::Allocator instantiation + + example: https://fiddle.skia.org/c/@Bitmap_allocPixels_4 + */ + void allocPixels(Allocator* allocator); + + /** Returns SkPixelRef, which contains: pixel base address; its dimensions; and + rowBytes(), the interval from one row to the next. Does not change SkPixelRef + reference count. SkPixelRef may be shared by multiple bitmaps. + If SkPixelRef has not been set, returns nullptr. + + @return SkPixelRef, or nullptr + */ + SkPixelRef* pixelRef() const { return fPixelRef.get(); } + + /** Returns origin of pixels within SkPixelRef. SkBitmap bounds is always contained + by SkPixelRef bounds, which may be the same size or larger. Multiple SkBitmap + can share the same SkPixelRef, where each SkBitmap has different bounds. + + The returned origin added to SkBitmap dimensions equals or is smaller than the + SkPixelRef dimensions. + + Returns (0, 0) if SkPixelRef is nullptr. + + @return pixel origin within SkPixelRef + + example: https://fiddle.skia.org/c/@Bitmap_pixelRefOrigin + */ + SkIPoint pixelRefOrigin() const; + + /** Replaces pixelRef and origin in SkBitmap. dx and dy specify the offset + within the SkPixelRef pixels for the top-left corner of the bitmap. + + Asserts in debug builds if dx or dy are out of range. Pins dx and dy + to legal range in release builds. + + The caller is responsible for ensuring that the pixels match the + SkColorType and SkAlphaType in SkImageInfo. + + @param pixelRef SkPixelRef describing pixel address and rowBytes() + @param dx column offset in SkPixelRef for bitmap origin + @param dy row offset in SkPixelRef for bitmap origin + + example: https://fiddle.skia.org/c/@Bitmap_setPixelRef + */ + void setPixelRef(sk_sp pixelRef, int dx, int dy); + + /** Returns true if SkBitmap is can be drawn. + + @return true if getPixels() is not nullptr + */ + bool readyToDraw() const { + return this->getPixels() != nullptr; + } + + /** Returns a unique value corresponding to the pixels in SkPixelRef. + Returns a different value after notifyPixelsChanged() has been called. + Returns zero if SkPixelRef is nullptr. + + Determines if pixels have changed since last examined. + + @return unique value for pixels in SkPixelRef + + example: https://fiddle.skia.org/c/@Bitmap_getGenerationID + */ + uint32_t getGenerationID() const; + + /** Marks that pixels in SkPixelRef have changed. Subsequent calls to + getGenerationID() return a different value. + + example: https://fiddle.skia.org/c/@Bitmap_notifyPixelsChanged + */ + void notifyPixelsChanged() const; + + /** Replaces pixel values with c, interpreted as being in the sRGB SkColorSpace. + All pixels contained by bounds() are affected. If the colorType() is + kGray_8_SkColorType or kRGB_565_SkColorType, then alpha is ignored; RGB is + treated as opaque. If colorType() is kAlpha_8_SkColorType, then RGB is ignored. + + @param c unpremultiplied color + @param colorSpace SkColorSpace of c + + example: https://fiddle.skia.org/c/@Bitmap_eraseColor + */ + void eraseColor(SkColor4f c, SkColorSpace* colorSpace = nullptr) const; + + /** Replaces pixel values with c, interpreted as being in the sRGB SkColorSpace. + All pixels contained by bounds() are affected. If the colorType() is + kGray_8_SkColorType or kRGB_565_SkColorType, then alpha is ignored; RGB is + treated as opaque. If colorType() is kAlpha_8_SkColorType, then RGB is ignored. + + Input color is ultimately converted to an SkColor4f, so eraseColor(SkColor4f c) + will have higher color resolution. + + @param c unpremultiplied color. + + example: https://fiddle.skia.org/c/@Bitmap_eraseColor + */ + void eraseColor(SkColor c) const; + + /** Replaces pixel values with unpremultiplied color built from a, r, g, and b, + interpreted as being in the sRGB SkColorSpace. All pixels contained by + bounds() are affected. If the colorType() is kGray_8_SkColorType or + kRGB_565_SkColorType, then a is ignored; r, g, and b are treated as opaque. + If colorType() is kAlpha_8_SkColorType, then r, g, and b are ignored. + + @param a amount of alpha, from fully transparent (0) to fully opaque (255) + @param r amount of red, from no red (0) to full red (255) + @param g amount of green, from no green (0) to full green (255) + @param b amount of blue, from no blue (0) to full blue (255) + */ + void eraseARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) const { + this->eraseColor(SkColorSetARGB(a, r, g, b)); + } + + /** Replaces pixel values inside area with c. interpreted as being in the sRGB + SkColorSpace. If area does not intersect bounds(), call has no effect. + + If the colorType() is kGray_8_SkColorType or kRGB_565_SkColorType, then alpha + is ignored; RGB is treated as opaque. If colorType() is kAlpha_8_SkColorType, + then RGB is ignored. + + @param c unpremultiplied color + @param area rectangle to fill + @param colorSpace SkColorSpace of c + + example: https://fiddle.skia.org/c/@Bitmap_erase + */ + void erase(SkColor4f c, SkColorSpace* colorSpace, const SkIRect& area) const; + void erase(SkColor4f c, const SkIRect& area) const; + + /** Replaces pixel values inside area with c. interpreted as being in the sRGB + SkColorSpace. If area does not intersect bounds(), call has no effect. + + If the colorType() is kGray_8_SkColorType or kRGB_565_SkColorType, then alpha + is ignored; RGB is treated as opaque. If colorType() is kAlpha_8_SkColorType, + then RGB is ignored. + + Input color is ultimately converted to an SkColor4f, so erase(SkColor4f c) + will have higher color resolution. + + @param c unpremultiplied color + @param area rectangle to fill + + example: https://fiddle.skia.org/c/@Bitmap_erase + */ + void erase(SkColor c, const SkIRect& area) const; + + /** Deprecated. + */ + void eraseArea(const SkIRect& area, SkColor c) const { + this->erase(c, area); + } + + /** Returns pixel at (x, y) as unpremultiplied color. + Returns black with alpha if SkColorType is kAlpha_8_SkColorType. + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined; and returns undefined values or may crash if + SK_RELEASE is defined. Fails if SkColorType is kUnknown_SkColorType or + pixel address is nullptr. + + SkColorSpace in SkImageInfo is ignored. Some color precision may be lost in the + conversion to unpremultiplied color; original pixel data may have additional + precision. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return pixel converted to unpremultiplied color + */ + SkColor getColor(int x, int y) const { + return this->pixmap().getColor(x, y); + } + + /** Returns pixel at (x, y) as unpremultiplied float color. + Returns black with alpha if SkColorType is kAlpha_8_SkColorType. + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined; and returns undefined values or may crash if + SK_RELEASE is defined. Fails if SkColorType is kUnknown_SkColorType or + pixel address is nullptr. + + SkColorSpace in SkImageInfo is ignored. Some color precision may be lost in the + conversion to unpremultiplied color. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return pixel converted to unpremultiplied color + */ + SkColor4f getColor4f(int x, int y) const { return this->pixmap().getColor4f(x, y); } + + /** Look up the pixel at (x,y) and return its alpha component, normalized to [0..1]. + This is roughly equivalent to SkGetColorA(getColor()), but can be more efficent + (and more precise if the pixels store more than 8 bits per component). + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return alpha converted to normalized float + */ + float getAlphaf(int x, int y) const { + return this->pixmap().getAlphaf(x, y); + } + + /** Returns pixel address at (x, y). + + Input is not validated: out of bounds values of x or y, or kUnknown_SkColorType, + trigger an assert() if built with SK_DEBUG defined. Returns nullptr if + SkColorType is kUnknown_SkColorType, or SkPixelRef is nullptr. + + Performs a lookup of pixel size; for better performance, call + one of: getAddr8(), getAddr16(), or getAddr32(). + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return generic pointer to pixel + + example: https://fiddle.skia.org/c/@Bitmap_getAddr + */ + void* getAddr(int x, int y) const; + + /** Returns address at (x, y). + + Input is not validated. Triggers an assert() if built with SK_DEBUG defined and: + - SkPixelRef is nullptr + - bytesPerPixel() is not four + - x is negative, or not less than width() + - y is negative, or not less than height() + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return unsigned 32-bit pointer to pixel at (x, y) + */ + inline uint32_t* getAddr32(int x, int y) const; + + /** Returns address at (x, y). + + Input is not validated. Triggers an assert() if built with SK_DEBUG defined and: + - SkPixelRef is nullptr + - bytesPerPixel() is not two + - x is negative, or not less than width() + - y is negative, or not less than height() + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return unsigned 16-bit pointer to pixel at (x, y) + */ + inline uint16_t* getAddr16(int x, int y) const; + + /** Returns address at (x, y). + + Input is not validated. Triggers an assert() if built with SK_DEBUG defined and: + - SkPixelRef is nullptr + - bytesPerPixel() is not one + - x is negative, or not less than width() + - y is negative, or not less than height() + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return unsigned 8-bit pointer to pixel at (x, y) + */ + inline uint8_t* getAddr8(int x, int y) const; + + /** Shares SkPixelRef with dst. Pixels are not copied; SkBitmap and dst point + to the same pixels; dst bounds() are set to the intersection of subset + and the original bounds(). + + subset may be larger than bounds(). Any area outside of bounds() is ignored. + + Any contents of dst are discarded. + + Return false if: + - dst is nullptr + - SkPixelRef is nullptr + - subset does not intersect bounds() + + @param dst SkBitmap set to subset + @param subset rectangle of pixels to reference + @return true if dst is replaced by subset + + example: https://fiddle.skia.org/c/@Bitmap_extractSubset + */ + bool extractSubset(SkBitmap* dst, const SkIRect& subset) const; + + /** Copies a SkRect of pixels from SkBitmap to dstPixels. Copy starts at (srcX, srcY), + and does not exceed SkBitmap (width(), height()). + + dstInfo specifies width, height, SkColorType, SkAlphaType, and SkColorSpace of + destination. dstRowBytes specifics the gap from one destination row to the next. + Returns true if pixels are copied. Returns false if: + - dstInfo has no address + - dstRowBytes is less than dstInfo.minRowBytes() + - SkPixelRef is nullptr + + Pixels are copied only if pixel conversion is possible. If SkBitmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dstInfo.colorType() must match. + If SkBitmap colorType() is kGray_8_SkColorType, dstInfo.colorSpace() must match. + If SkBitmap alphaType() is kOpaque_SkAlphaType, dstInfo.alphaType() must + match. If SkBitmap colorSpace() is nullptr, dstInfo.colorSpace() must match. Returns + false if pixel conversion is not possible. + + srcX and srcY may be negative to copy only top or left of source. Returns + false if width() or height() is zero or negative. + Returns false if abs(srcX) >= Bitmap width(), or if abs(srcY) >= Bitmap height(). + + @param dstInfo destination width, height, SkColorType, SkAlphaType, SkColorSpace + @param dstPixels destination pixel storage + @param dstRowBytes destination row length + @param srcX column index whose absolute value is less than width() + @param srcY row index whose absolute value is less than height() + @return true if pixels are copied to dstPixels + */ + bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, + int srcX, int srcY) const; + + /** Copies a SkRect of pixels from SkBitmap to dst. Copy starts at (srcX, srcY), and + does not exceed SkBitmap (width(), height()). + + dst specifies width, height, SkColorType, SkAlphaType, SkColorSpace, pixel storage, + and row bytes of destination. dst.rowBytes() specifics the gap from one destination + row to the next. Returns true if pixels are copied. Returns false if: + - dst pixel storage equals nullptr + - dst.rowBytes is less than SkImageInfo::minRowBytes() + - SkPixelRef is nullptr + + Pixels are copied only if pixel conversion is possible. If SkBitmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dst SkColorType must match. + If SkBitmap colorType() is kGray_8_SkColorType, dst SkColorSpace must match. + If SkBitmap alphaType() is kOpaque_SkAlphaType, dst SkAlphaType must + match. If SkBitmap colorSpace() is nullptr, dst SkColorSpace must match. Returns + false if pixel conversion is not possible. + + srcX and srcY may be negative to copy only top or left of source. Returns + false if width() or height() is zero or negative. + Returns false if abs(srcX) >= Bitmap width(), or if abs(srcY) >= Bitmap height(). + + @param dst destination SkPixmap: SkImageInfo, pixels, row bytes + @param srcX column index whose absolute value is less than width() + @param srcY row index whose absolute value is less than height() + @return true if pixels are copied to dst + + example: https://fiddle.skia.org/c/@Bitmap_readPixels_2 + */ + bool readPixels(const SkPixmap& dst, int srcX, int srcY) const; + + /** Copies a SkRect of pixels from SkBitmap to dst. Copy starts at (0, 0), and + does not exceed SkBitmap (width(), height()). + + dst specifies width, height, SkColorType, SkAlphaType, SkColorSpace, pixel storage, + and row bytes of destination. dst.rowBytes() specifics the gap from one destination + row to the next. Returns true if pixels are copied. Returns false if: + - dst pixel storage equals nullptr + - dst.rowBytes is less than SkImageInfo::minRowBytes() + - SkPixelRef is nullptr + + Pixels are copied only if pixel conversion is possible. If SkBitmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dst SkColorType must match. + If SkBitmap colorType() is kGray_8_SkColorType, dst SkColorSpace must match. + If SkBitmap alphaType() is kOpaque_SkAlphaType, dst SkAlphaType must + match. If SkBitmap colorSpace() is nullptr, dst SkColorSpace must match. Returns + false if pixel conversion is not possible. + + @param dst destination SkPixmap: SkImageInfo, pixels, row bytes + @return true if pixels are copied to dst + */ + bool readPixels(const SkPixmap& dst) const { + return this->readPixels(dst, 0, 0); + } + + /** Copies a SkRect of pixels from src. Copy starts at (dstX, dstY), and does not exceed + (src.width(), src.height()). + + src specifies width, height, SkColorType, SkAlphaType, SkColorSpace, pixel storage, + and row bytes of source. src.rowBytes() specifics the gap from one source + row to the next. Returns true if pixels are copied. Returns false if: + - src pixel storage equals nullptr + - src.rowBytes is less than SkImageInfo::minRowBytes() + - SkPixelRef is nullptr + + Pixels are copied only if pixel conversion is possible. If SkBitmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; src SkColorType must match. + If SkBitmap colorType() is kGray_8_SkColorType, src SkColorSpace must match. + If SkBitmap alphaType() is kOpaque_SkAlphaType, src SkAlphaType must + match. If SkBitmap colorSpace() is nullptr, src SkColorSpace must match. Returns + false if pixel conversion is not possible. + + dstX and dstY may be negative to copy only top or left of source. Returns + false if width() or height() is zero or negative. + Returns false if abs(dstX) >= Bitmap width(), or if abs(dstY) >= Bitmap height(). + + @param src source SkPixmap: SkImageInfo, pixels, row bytes + @param dstX column index whose absolute value is less than width() + @param dstY row index whose absolute value is less than height() + @return true if src pixels are copied to SkBitmap + + example: https://fiddle.skia.org/c/@Bitmap_writePixels + */ + bool writePixels(const SkPixmap& src, int dstX, int dstY); + + /** Copies a SkRect of pixels from src. Copy starts at (0, 0), and does not exceed + (src.width(), src.height()). + + src specifies width, height, SkColorType, SkAlphaType, SkColorSpace, pixel storage, + and row bytes of source. src.rowBytes() specifics the gap from one source + row to the next. Returns true if pixels are copied. Returns false if: + - src pixel storage equals nullptr + - src.rowBytes is less than SkImageInfo::minRowBytes() + - SkPixelRef is nullptr + + Pixels are copied only if pixel conversion is possible. If SkBitmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; src SkColorType must match. + If SkBitmap colorType() is kGray_8_SkColorType, src SkColorSpace must match. + If SkBitmap alphaType() is kOpaque_SkAlphaType, src SkAlphaType must + match. If SkBitmap colorSpace() is nullptr, src SkColorSpace must match. Returns + false if pixel conversion is not possible. + + @param src source SkPixmap: SkImageInfo, pixels, row bytes + @return true if src pixels are copied to SkBitmap + */ + bool writePixels(const SkPixmap& src) { + return this->writePixels(src, 0, 0); + } + + /** Sets dst to alpha described by pixels. Returns false if dst cannot be written to + or dst pixels cannot be allocated. + + Uses HeapAllocator to reserve memory for dst SkPixelRef. + + @param dst holds SkPixelRef to fill with alpha layer + @return true if alpha layer was constructed in dst SkPixelRef + */ + bool extractAlpha(SkBitmap* dst) const { + return this->extractAlpha(dst, nullptr, nullptr, nullptr); + } + + /** Sets dst to alpha described by pixels. Returns false if dst cannot be written to + or dst pixels cannot be allocated. + + If paint is not nullptr and contains SkMaskFilter, SkMaskFilter + generates mask alpha from SkBitmap. Uses HeapAllocator to reserve memory for dst + SkPixelRef. Sets offset to top-left position for dst for alignment with SkBitmap; + (0, 0) unless SkMaskFilter generates mask. + + @param dst holds SkPixelRef to fill with alpha layer + @param paint holds optional SkMaskFilter; may be nullptr + @param offset top-left position for dst; may be nullptr + @return true if alpha layer was constructed in dst SkPixelRef + */ + bool extractAlpha(SkBitmap* dst, const SkPaint* paint, + SkIPoint* offset) const { + return this->extractAlpha(dst, paint, nullptr, offset); + } + + /** Sets dst to alpha described by pixels. Returns false if dst cannot be written to + or dst pixels cannot be allocated. + + If paint is not nullptr and contains SkMaskFilter, SkMaskFilter + generates mask alpha from SkBitmap. allocator may reference a custom allocation + class or be set to nullptr to use HeapAllocator. Sets offset to top-left + position for dst for alignment with SkBitmap; (0, 0) unless SkMaskFilter generates + mask. + + @param dst holds SkPixelRef to fill with alpha layer + @param paint holds optional SkMaskFilter; may be nullptr + @param allocator function to reserve memory for SkPixelRef; may be nullptr + @param offset top-left position for dst; may be nullptr + @return true if alpha layer was constructed in dst SkPixelRef + */ + bool extractAlpha(SkBitmap* dst, const SkPaint* paint, Allocator* allocator, + SkIPoint* offset) const; + + /** Copies SkBitmap pixel address, row bytes, and SkImageInfo to pixmap, if address + is available, and returns true. If pixel address is not available, return + false and leave pixmap unchanged. + + pixmap contents become invalid on any future change to SkBitmap. + + @param pixmap storage for pixel state if pixels are readable; otherwise, ignored + @return true if SkBitmap has direct access to pixels + + example: https://fiddle.skia.org/c/@Bitmap_peekPixels + */ + bool peekPixels(SkPixmap* pixmap) const; + + /** + * Make a shader with the specified tiling, matrix and sampling. + */ + sk_sp makeShader(SkTileMode tmx, SkTileMode tmy, const SkSamplingOptions&, + const SkMatrix* localMatrix = nullptr) const; + sk_sp makeShader(SkTileMode tmx, SkTileMode tmy, const SkSamplingOptions& sampling, + const SkMatrix& lm) const; + /** Defaults to clamp in both X and Y. */ + sk_sp makeShader(const SkSamplingOptions& sampling, const SkMatrix& lm) const; + sk_sp makeShader(const SkSamplingOptions& sampling, + const SkMatrix* lm = nullptr) const; + + /** + * Returns a new image from the bitmap. If the bitmap is marked immutable, this will + * share the pixel buffer. If not, it will make a copy of the pixels for the image. + */ + sk_sp asImage() const; + + /** Asserts if internal values are illegal or inconsistent. Only available if + SK_DEBUG is defined at compile time. + */ + SkDEBUGCODE(void validate() const;) + + /** \class SkBitmap::Allocator + Abstract subclass of HeapAllocator. + */ + class Allocator : public SkRefCnt { + public: + + /** Allocates the pixel memory for the bitmap, given its dimensions and + SkColorType. Returns true on success, where success means either setPixels() + or setPixelRef() was called. + + @param bitmap SkBitmap containing SkImageInfo as input, and SkPixelRef as output + @return true if SkPixelRef was allocated + */ + virtual bool allocPixelRef(SkBitmap* bitmap) = 0; + private: + using INHERITED = SkRefCnt; + }; + + /** \class SkBitmap::HeapAllocator + Subclass of SkBitmap::Allocator that returns a SkPixelRef that allocates its pixel + memory from the heap. This is the default SkBitmap::Allocator invoked by + allocPixels(). + */ + class HeapAllocator : public Allocator { + public: + + /** Allocates the pixel memory for the bitmap, given its dimensions and + SkColorType. Returns true on success, where success means either setPixels() + or setPixelRef() was called. + + @param bitmap SkBitmap containing SkImageInfo as input, and SkPixelRef as output + @return true if pixels are allocated + + example: https://fiddle.skia.org/c/@Bitmap_HeapAllocator_allocPixelRef + */ + bool allocPixelRef(SkBitmap* bitmap) override; + }; + +private: + sk_sp fPixelRef; + SkPixmap fPixmap; + sk_sp fMips; + + friend class SkImage_Raster; + friend class SkReadBuffer; // unflatten + friend class GrProxyProvider; // fMips +}; + +/////////////////////////////////////////////////////////////////////////////// + +inline uint32_t* SkBitmap::getAddr32(int x, int y) const { + SkASSERT(fPixmap.addr()); + return fPixmap.writable_addr32(x, y); +} + +inline uint16_t* SkBitmap::getAddr16(int x, int y) const { + SkASSERT(fPixmap.addr()); + return fPixmap.writable_addr16(x, y); +} + +inline uint8_t* SkBitmap::getAddr8(int x, int y) const { + SkASSERT(fPixmap.addr()); + return fPixmap.writable_addr8(x, y); +} + +#endif diff --git a/gfx/skia/skia/include/core/SkBlendMode.h b/gfx/skia/skia/include/core/SkBlendMode.h new file mode 100644 index 0000000000..4abe915762 --- /dev/null +++ b/gfx/skia/skia/include/core/SkBlendMode.h @@ -0,0 +1,112 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlendMode_DEFINED +#define SkBlendMode_DEFINED + +#include "include/core/SkTypes.h" + +/** + * Blends are operators that take in two colors (source, destination) and return a new color. + * Many of these operate the same on all 4 components: red, green, blue, alpha. For these, + * we just document what happens to one component, rather than naming each one separately. + * + * Different SkColorTypes have different representations for color components: + * 8-bit: 0..255 + * 6-bit: 0..63 + * 5-bit: 0..31 + * 4-bit: 0..15 + * floats: 0...1 + * + * The documentation is expressed as if the component values are always 0..1 (floats). + * + * For brevity, the documentation uses the following abbreviations + * s : source + * d : destination + * sa : source alpha + * da : destination alpha + * + * Results are abbreviated + * r : if all 4 components are computed in the same manner + * ra : result alpha component + * rc : result "color": red, green, blue components + */ +enum class SkBlendMode { + kClear, //!< r = 0 + kSrc, //!< r = s + kDst, //!< r = d + kSrcOver, //!< r = s + (1-sa)*d + kDstOver, //!< r = d + (1-da)*s + kSrcIn, //!< r = s * da + kDstIn, //!< r = d * sa + kSrcOut, //!< r = s * (1-da) + kDstOut, //!< r = d * (1-sa) + kSrcATop, //!< r = s*da + d*(1-sa) + kDstATop, //!< r = d*sa + s*(1-da) + kXor, //!< r = s*(1-da) + d*(1-sa) + kPlus, //!< r = min(s + d, 1) + kModulate, //!< r = s*d + kScreen, //!< r = s + d - s*d + + kOverlay, //!< multiply or screen, depending on destination + kDarken, //!< rc = s + d - max(s*da, d*sa), ra = kSrcOver + kLighten, //!< rc = s + d - min(s*da, d*sa), ra = kSrcOver + kColorDodge, //!< brighten destination to reflect source + kColorBurn, //!< darken destination to reflect source + kHardLight, //!< multiply or screen, depending on source + kSoftLight, //!< lighten or darken, depending on source + kDifference, //!< rc = s + d - 2*(min(s*da, d*sa)), ra = kSrcOver + kExclusion, //!< rc = s + d - two(s*d), ra = kSrcOver + kMultiply, //!< r = s*(1-da) + d*(1-sa) + s*d + + kHue, //!< hue of source with saturation and luminosity of destination + kSaturation, //!< saturation of source with hue and luminosity of destination + kColor, //!< hue and saturation of source with luminosity of destination + kLuminosity, //!< luminosity of source with hue and saturation of destination + + kLastCoeffMode = kScreen, //!< last porter duff blend mode + kLastSeparableMode = kMultiply, //!< last blend mode operating separately on components + kLastMode = kLuminosity, //!< last valid value +}; + +static constexpr int kSkBlendModeCount = static_cast(SkBlendMode::kLastMode) + 1; + +/** + * For Porter-Duff SkBlendModes (those <= kLastCoeffMode), these coefficients describe the blend + * equation used. Coefficient-based blend modes specify an equation: + * ('dstCoeff' * dst + 'srcCoeff' * src), where the coefficient values are constants, functions of + * the src or dst alpha, or functions of the src or dst color. + */ +enum class SkBlendModeCoeff { + kZero, /** 0 */ + kOne, /** 1 */ + kSC, /** src color */ + kISC, /** inverse src color (i.e. 1 - sc) */ + kDC, /** dst color */ + kIDC, /** inverse dst color (i.e. 1 - dc) */ + kSA, /** src alpha */ + kISA, /** inverse src alpha (i.e. 1 - sa) */ + kDA, /** dst alpha */ + kIDA, /** inverse dst alpha (i.e. 1 - da) */ + + kCoeffCount +}; + +/** + * Returns true if 'mode' is a coefficient-based blend mode (<= kLastCoeffMode). If true is + * returned, the mode's src and dst coefficient functions are set in 'src' and 'dst'. + */ +SK_API bool SkBlendMode_AsCoeff(SkBlendMode mode, SkBlendModeCoeff* src, SkBlendModeCoeff* dst); + + +/** Returns name of blendMode as null-terminated C string. + + @return C string +*/ +SK_API const char* SkBlendMode_Name(SkBlendMode blendMode); + +#endif diff --git a/gfx/skia/skia/include/core/SkBlender.h b/gfx/skia/skia/include/core/SkBlender.h new file mode 100644 index 0000000000..7acba87f52 --- /dev/null +++ b/gfx/skia/skia/include/core/SkBlender.h @@ -0,0 +1,33 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlender_DEFINED +#define SkBlender_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkFlattenable.h" + +/** + * SkBlender represents a custom blend function in the Skia pipeline. When an SkBlender is + * present in a paint, the SkBlendMode is ignored. A blender combines a source color (the + * result of our paint) and destination color (from the canvas) into a final color. + */ +class SK_API SkBlender : public SkFlattenable { +public: + /** + * Create a blender that implements the specified BlendMode. + */ + static sk_sp Mode(SkBlendMode mode); + +private: + SkBlender() = default; + friend class SkBlenderBase; + + using INHERITED = SkFlattenable; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkBlurTypes.h b/gfx/skia/skia/include/core/SkBlurTypes.h new file mode 100644 index 0000000000..f0dde10f25 --- /dev/null +++ b/gfx/skia/skia/include/core/SkBlurTypes.h @@ -0,0 +1,20 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlurTypes_DEFINED +#define SkBlurTypes_DEFINED + +enum SkBlurStyle : int { + kNormal_SkBlurStyle, //!< fuzzy inside and outside + kSolid_SkBlurStyle, //!< solid inside, fuzzy outside + kOuter_SkBlurStyle, //!< nothing inside, fuzzy outside + kInner_SkBlurStyle, //!< fuzzy inside, nothing outside + + kLastEnum_SkBlurStyle = kInner_SkBlurStyle, +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkCanvas.h b/gfx/skia/skia/include/core/SkCanvas.h new file mode 100644 index 0000000000..650d9171ce --- /dev/null +++ b/gfx/skia/skia/include/core/SkCanvas.h @@ -0,0 +1,2632 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCanvas_DEFINED +#define SkCanvas_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkClipOp.h" +#include "include/core/SkColor.h" +#include "include/core/SkFontTypes.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRasterHandleAllocator.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkString.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkDeque.h" + +#include +#include +#include +#include + +#ifndef SK_SUPPORT_LEGACY_GETTOTALMATRIX +#define SK_SUPPORT_LEGACY_GETTOTALMATRIX +#endif + +namespace sktext { +class GlyphRunBuilder; +class GlyphRunList; +} + +class AutoLayerForImageFilter; +class GrRecordingContext; + +class SkBaseDevice; +class SkBitmap; +class SkBlender; +class SkData; +class SkDrawable; +class SkFont; +class SkImage; +class SkMesh; +class SkPaintFilterCanvas; +class SkPath; +class SkPicture; +class SkPixmap; +class SkRRect; +class SkRegion; +class SkShader; +class SkSpecialImage; +class SkSurface; +class SkSurface_Base; +class SkTextBlob; +class SkVertices; +struct SkDrawShadowRec; +struct SkRSXform; + +namespace skgpu::graphite { class Recorder; } +namespace sktext::gpu { class Slug; } +namespace SkRecords { class Draw; } + +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) && defined(SK_GANESH) +class GrBackendRenderTarget; +#endif + +// TODO: +// This is not ideal but Chrome is depending on a forward decl of GrSlug here. +// It should be removed once Chrome has migrated to sktext::gpu::Slug. +using GrSlug = sktext::gpu::Slug; + +/** \class SkCanvas + SkCanvas provides an interface for drawing, and how the drawing is clipped and transformed. + SkCanvas contains a stack of SkMatrix and clip values. + + SkCanvas and SkPaint together provide the state to draw into SkSurface or SkBaseDevice. + Each SkCanvas draw call transforms the geometry of the object by the concatenation of all + SkMatrix values in the stack. The transformed geometry is clipped by the intersection + of all of clip values in the stack. The SkCanvas draw calls use SkPaint to supply drawing + state such as color, SkTypeface, text size, stroke width, SkShader and so on. + + To draw to a pixel-based destination, create raster surface or GPU surface. + Request SkCanvas from SkSurface to obtain the interface to draw. + SkCanvas generated by raster surface draws to memory visible to the CPU. + SkCanvas generated by GPU surface uses Vulkan or OpenGL to draw to the GPU. + + To draw to a document, obtain SkCanvas from SVG canvas, document PDF, or SkPictureRecorder. + SkDocument based SkCanvas and other SkCanvas subclasses reference SkBaseDevice describing the + destination. + + SkCanvas can be constructed to draw to SkBitmap without first creating raster surface. + This approach may be deprecated in the future. +*/ +class SK_API SkCanvas { +public: + + /** Allocates raster SkCanvas that will draw directly into pixels. + + SkCanvas is returned if all parameters are valid. + Valid parameters include: + info dimensions are zero or positive; + info contains SkColorType and SkAlphaType supported by raster surface; + pixels is not nullptr; + rowBytes is zero or large enough to contain info width pixels of SkColorType. + + Pass zero for rowBytes to compute rowBytes from info width and size of pixel. + If rowBytes is greater than zero, it must be equal to or greater than + info width times bytes required for SkColorType. + + Pixel buffer size should be info height times computed rowBytes. + Pixels are not initialized. + To access pixels after drawing, call flush() or peekPixels(). + + @param info width, height, SkColorType, SkAlphaType, SkColorSpace, of raster surface; + width, or height, or both, may be zero + @param pixels pointer to destination pixels buffer + @param rowBytes interval from one SkSurface row to the next, or zero + @param props LCD striping orientation and setting for device independent fonts; + may be nullptr + @return SkCanvas if all parameters are valid; otherwise, nullptr + */ + static std::unique_ptr MakeRasterDirect(const SkImageInfo& info, void* pixels, + size_t rowBytes, + const SkSurfaceProps* props = nullptr); + + /** Allocates raster SkCanvas specified by inline image specification. Subsequent SkCanvas + calls draw into pixels. + SkColorType is set to kN32_SkColorType. + SkAlphaType is set to kPremul_SkAlphaType. + To access pixels after drawing, call flush() or peekPixels(). + + SkCanvas is returned if all parameters are valid. + Valid parameters include: + width and height are zero or positive; + pixels is not nullptr; + rowBytes is zero or large enough to contain width pixels of kN32_SkColorType. + + Pass zero for rowBytes to compute rowBytes from width and size of pixel. + If rowBytes is greater than zero, it must be equal to or greater than + width times bytes required for SkColorType. + + Pixel buffer size should be height times rowBytes. + + @param width pixel column count on raster surface created; must be zero or greater + @param height pixel row count on raster surface created; must be zero or greater + @param pixels pointer to destination pixels buffer; buffer size should be height + times rowBytes + @param rowBytes interval from one SkSurface row to the next, or zero + @return SkCanvas if all parameters are valid; otherwise, nullptr + */ + static std::unique_ptr MakeRasterDirectN32(int width, int height, SkPMColor* pixels, + size_t rowBytes) { + return MakeRasterDirect(SkImageInfo::MakeN32Premul(width, height), pixels, rowBytes); + } + + /** Creates an empty SkCanvas with no backing device or pixels, with + a width and height of zero. + + @return empty SkCanvas + + example: https://fiddle.skia.org/c/@Canvas_empty_constructor + */ + SkCanvas(); + + /** Creates SkCanvas of the specified dimensions without a SkSurface. + Used by subclasses with custom implementations for draw member functions. + + If props equals nullptr, SkSurfaceProps are created with + SkSurfaceProps::InitType settings, which choose the pixel striping + direction and order. Since a platform may dynamically change its direction when + the device is rotated, and since a platform may have multiple monitors with + different characteristics, it is best not to rely on this legacy behavior. + + @param width zero or greater + @param height zero or greater + @param props LCD striping orientation and setting for device independent fonts; + may be nullptr + @return SkCanvas placeholder with dimensions + + example: https://fiddle.skia.org/c/@Canvas_int_int_const_SkSurfaceProps_star + */ + SkCanvas(int width, int height, const SkSurfaceProps* props = nullptr); + + /** Private. For internal use only. + */ + explicit SkCanvas(sk_sp device); + + /** Constructs a canvas that draws into bitmap. + Sets kUnknown_SkPixelGeometry in constructed SkSurface. + + SkBitmap is copied so that subsequently editing bitmap will not affect + constructed SkCanvas. + + May be deprecated in the future. + + @param bitmap width, height, SkColorType, SkAlphaType, and pixel + storage of raster surface + @return SkCanvas that can be used to draw into bitmap + + example: https://fiddle.skia.org/c/@Canvas_copy_const_SkBitmap + */ + explicit SkCanvas(const SkBitmap& bitmap); + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + /** Private. + */ + enum class ColorBehavior { + kLegacy, //!< placeholder + }; + + /** Private. For use by Android framework only. + + @param bitmap specifies a bitmap for the canvas to draw into + @param behavior specializes this constructor; value is unused + @return SkCanvas that can be used to draw into bitmap + */ + SkCanvas(const SkBitmap& bitmap, ColorBehavior behavior); +#endif + + /** Constructs a canvas that draws into bitmap. + Use props to match the device characteristics, like LCD striping. + + bitmap is copied so that subsequently editing bitmap will not affect + constructed SkCanvas. + + @param bitmap width, height, SkColorType, SkAlphaType, + and pixel storage of raster surface + @param props order and orientation of RGB striping; and whether to use + device independent fonts + @return SkCanvas that can be used to draw into bitmap + + example: https://fiddle.skia.org/c/@Canvas_const_SkBitmap_const_SkSurfaceProps + */ + SkCanvas(const SkBitmap& bitmap, const SkSurfaceProps& props); + + /** Draws saved layers, if any. + Frees up resources used by SkCanvas. + + example: https://fiddle.skia.org/c/@Canvas_destructor + */ + virtual ~SkCanvas(); + + /** Returns SkImageInfo for SkCanvas. If SkCanvas is not associated with raster surface or + GPU surface, returned SkColorType is set to kUnknown_SkColorType. + + @return dimensions and SkColorType of SkCanvas + + example: https://fiddle.skia.org/c/@Canvas_imageInfo + */ + SkImageInfo imageInfo() const; + + /** Copies SkSurfaceProps, if SkCanvas is associated with raster surface or + GPU surface, and returns true. Otherwise, returns false and leave props unchanged. + + @param props storage for writable SkSurfaceProps + @return true if SkSurfaceProps was copied + + DEPRECATED: Replace usage with getBaseProps() or getTopProps() + + example: https://fiddle.skia.org/c/@Canvas_getProps + */ + bool getProps(SkSurfaceProps* props) const; + + /** Returns the SkSurfaceProps associated with the canvas (i.e., at the base of the layer + stack). + + @return base SkSurfaceProps + */ + SkSurfaceProps getBaseProps() const; + + /** Returns the SkSurfaceProps associated with the canvas that are currently active (i.e., at + the top of the layer stack). This can differ from getBaseProps depending on the flags + passed to saveLayer (see SaveLayerFlagsSet). + + @return SkSurfaceProps active in the current/top layer + */ + SkSurfaceProps getTopProps() const; + + /** Triggers the immediate execution of all pending draw operations. + If SkCanvas is associated with GPU surface, resolves all pending GPU operations. + If SkCanvas is associated with raster surface, has no effect; raster draw + operations are never deferred. + + DEPRECATED: Replace usage with GrDirectContext::flush() + */ + void flush(); + + /** Gets the size of the base or root layer in global canvas coordinates. The + origin of the base layer is always (0,0). The area available for drawing may be + smaller (due to clipping or saveLayer). + + @return integral width and height of base layer + + example: https://fiddle.skia.org/c/@Canvas_getBaseLayerSize + */ + virtual SkISize getBaseLayerSize() const; + + /** Creates SkSurface matching info and props, and associates it with SkCanvas. + Returns nullptr if no match found. + + If props is nullptr, matches SkSurfaceProps in SkCanvas. If props is nullptr and SkCanvas + does not have SkSurfaceProps, creates SkSurface with default SkSurfaceProps. + + @param info width, height, SkColorType, SkAlphaType, and SkColorSpace + @param props SkSurfaceProps to match; may be nullptr to match SkCanvas + @return SkSurface matching info and props, or nullptr if no match is available + + example: https://fiddle.skia.org/c/@Canvas_makeSurface + */ + sk_sp makeSurface(const SkImageInfo& info, const SkSurfaceProps* props = nullptr); + + /** Returns GPU context of the GPU surface associated with SkCanvas. + + @return GPU context, if available; nullptr otherwise + + example: https://fiddle.skia.org/c/@Canvas_recordingContext + */ + virtual GrRecordingContext* recordingContext(); + + /** Returns Recorder for the GPU surface associated with SkCanvas. + + @return Recorder, if available; nullptr otherwise + */ + virtual skgpu::graphite::Recorder* recorder(); + + /** Sometimes a canvas is owned by a surface. If it is, getSurface() will return a bare + * pointer to that surface, else this will return nullptr. + */ + SkSurface* getSurface() const; + + /** Returns the pixel base address, SkImageInfo, rowBytes, and origin if the pixels + can be read directly. The returned address is only valid + while SkCanvas is in scope and unchanged. Any SkCanvas call or SkSurface call + may invalidate the returned address and other returned values. + + If pixels are inaccessible, info, rowBytes, and origin are unchanged. + + @param info storage for writable pixels' SkImageInfo; may be nullptr + @param rowBytes storage for writable pixels' row bytes; may be nullptr + @param origin storage for SkCanvas top layer origin, its top-left corner; + may be nullptr + @return address of pixels, or nullptr if inaccessible + + example: https://fiddle.skia.org/c/@Canvas_accessTopLayerPixels_a + example: https://fiddle.skia.org/c/@Canvas_accessTopLayerPixels_b + */ + void* accessTopLayerPixels(SkImageInfo* info, size_t* rowBytes, SkIPoint* origin = nullptr); + + /** Returns custom context that tracks the SkMatrix and clip. + + Use SkRasterHandleAllocator to blend Skia drawing with custom drawing, typically performed + by the host platform user interface. The custom context returned is generated by + SkRasterHandleAllocator::MakeCanvas, which creates a custom canvas with raster storage for + the drawing destination. + + @return context of custom allocation + + example: https://fiddle.skia.org/c/@Canvas_accessTopRasterHandle + */ + SkRasterHandleAllocator::Handle accessTopRasterHandle() const; + + /** Returns true if SkCanvas has direct access to its pixels. + + Pixels are readable when SkBaseDevice is raster. Pixels are not readable when SkCanvas + is returned from GPU surface, returned by SkDocument::beginPage, returned by + SkPictureRecorder::beginRecording, or SkCanvas is the base of a utility class + like DebugCanvas. + + pixmap is valid only while SkCanvas is in scope and unchanged. Any + SkCanvas or SkSurface call may invalidate the pixmap values. + + @param pixmap storage for pixel state if pixels are readable; otherwise, ignored + @return true if SkCanvas has direct access to pixels + + example: https://fiddle.skia.org/c/@Canvas_peekPixels + */ + bool peekPixels(SkPixmap* pixmap); + + /** Copies SkRect of pixels from SkCanvas into dstPixels. SkMatrix and clip are + ignored. + + Source SkRect corners are (srcX, srcY) and (imageInfo().width(), imageInfo().height()). + Destination SkRect corners are (0, 0) and (dstInfo.width(), dstInfo.height()). + Copies each readable pixel intersecting both rectangles, without scaling, + converting to dstInfo.colorType() and dstInfo.alphaType() if required. + + Pixels are readable when SkBaseDevice is raster, or backed by a GPU. + Pixels are not readable when SkCanvas is returned by SkDocument::beginPage, + returned by SkPictureRecorder::beginRecording, or SkCanvas is the base of a utility + class like DebugCanvas. + + The destination pixel storage must be allocated by the caller. + + Pixel values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination rectangles + are copied. dstPixels contents outside SkRect intersection are unchanged. + + Pass negative values for srcX or srcY to offset pixels across or down destination. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - SkCanvas pixels could not be converted to dstInfo.colorType() or dstInfo.alphaType(). + - SkCanvas pixels are not readable; for instance, SkCanvas is document-based. + - dstRowBytes is too small to contain one row of pixels. + + @param dstInfo width, height, SkColorType, and SkAlphaType of dstPixels + @param dstPixels storage for pixels; dstInfo.height() times dstRowBytes, or larger + @param dstRowBytes size of one destination row; dstInfo.width() times pixel size, or larger + @param srcX offset into readable pixels on x-axis; may be negative + @param srcY offset into readable pixels on y-axis; may be negative + @return true if pixels were copied + */ + bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, + int srcX, int srcY); + + /** Copies SkRect of pixels from SkCanvas into pixmap. SkMatrix and clip are + ignored. + + Source SkRect corners are (srcX, srcY) and (imageInfo().width(), imageInfo().height()). + Destination SkRect corners are (0, 0) and (pixmap.width(), pixmap.height()). + Copies each readable pixel intersecting both rectangles, without scaling, + converting to pixmap.colorType() and pixmap.alphaType() if required. + + Pixels are readable when SkBaseDevice is raster, or backed by a GPU. + Pixels are not readable when SkCanvas is returned by SkDocument::beginPage, + returned by SkPictureRecorder::beginRecording, or SkCanvas is the base of a utility + class like DebugCanvas. + + Caller must allocate pixel storage in pixmap if needed. + + Pixel values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination SkRect + are copied. pixmap pixels contents outside SkRect intersection are unchanged. + + Pass negative values for srcX or srcY to offset pixels across or down pixmap. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - SkCanvas pixels could not be converted to pixmap.colorType() or pixmap.alphaType(). + - SkCanvas pixels are not readable; for instance, SkCanvas is document-based. + - SkPixmap pixels could not be allocated. + - pixmap.rowBytes() is too small to contain one row of pixels. + + @param pixmap storage for pixels copied from SkCanvas + @param srcX offset into readable pixels on x-axis; may be negative + @param srcY offset into readable pixels on y-axis; may be negative + @return true if pixels were copied + + example: https://fiddle.skia.org/c/@Canvas_readPixels_2 + */ + bool readPixels(const SkPixmap& pixmap, int srcX, int srcY); + + /** Copies SkRect of pixels from SkCanvas into bitmap. SkMatrix and clip are + ignored. + + Source SkRect corners are (srcX, srcY) and (imageInfo().width(), imageInfo().height()). + Destination SkRect corners are (0, 0) and (bitmap.width(), bitmap.height()). + Copies each readable pixel intersecting both rectangles, without scaling, + converting to bitmap.colorType() and bitmap.alphaType() if required. + + Pixels are readable when SkBaseDevice is raster, or backed by a GPU. + Pixels are not readable when SkCanvas is returned by SkDocument::beginPage, + returned by SkPictureRecorder::beginRecording, or SkCanvas is the base of a utility + class like DebugCanvas. + + Caller must allocate pixel storage in bitmap if needed. + + SkBitmap values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination rectangles + are copied. SkBitmap pixels outside SkRect intersection are unchanged. + + Pass negative values for srcX or srcY to offset pixels across or down bitmap. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - SkCanvas pixels could not be converted to bitmap.colorType() or bitmap.alphaType(). + - SkCanvas pixels are not readable; for instance, SkCanvas is document-based. + - bitmap pixels could not be allocated. + - bitmap.rowBytes() is too small to contain one row of pixels. + + @param bitmap storage for pixels copied from SkCanvas + @param srcX offset into readable pixels on x-axis; may be negative + @param srcY offset into readable pixels on y-axis; may be negative + @return true if pixels were copied + + example: https://fiddle.skia.org/c/@Canvas_readPixels_3 + */ + bool readPixels(const SkBitmap& bitmap, int srcX, int srcY); + + /** Copies SkRect from pixels to SkCanvas. SkMatrix and clip are ignored. + Source SkRect corners are (0, 0) and (info.width(), info.height()). + Destination SkRect corners are (x, y) and + (imageInfo().width(), imageInfo().height()). + + Copies each readable pixel intersecting both rectangles, without scaling, + converting to imageInfo().colorType() and imageInfo().alphaType() if required. + + Pixels are writable when SkBaseDevice is raster, or backed by a GPU. + Pixels are not writable when SkCanvas is returned by SkDocument::beginPage, + returned by SkPictureRecorder::beginRecording, or SkCanvas is the base of a utility + class like DebugCanvas. + + Pixel values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination rectangles + are copied. SkCanvas pixels outside SkRect intersection are unchanged. + + Pass negative values for x or y to offset pixels to the left or + above SkCanvas pixels. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - pixels could not be converted to SkCanvas imageInfo().colorType() or + imageInfo().alphaType(). + - SkCanvas pixels are not writable; for instance, SkCanvas is document-based. + - rowBytes is too small to contain one row of pixels. + + @param info width, height, SkColorType, and SkAlphaType of pixels + @param pixels pixels to copy, of size info.height() times rowBytes, or larger + @param rowBytes size of one row of pixels; info.width() times pixel size, or larger + @param x offset into SkCanvas writable pixels on x-axis; may be negative + @param y offset into SkCanvas writable pixels on y-axis; may be negative + @return true if pixels were written to SkCanvas + + example: https://fiddle.skia.org/c/@Canvas_writePixels + */ + bool writePixels(const SkImageInfo& info, const void* pixels, size_t rowBytes, int x, int y); + + /** Copies SkRect from pixels to SkCanvas. SkMatrix and clip are ignored. + Source SkRect corners are (0, 0) and (bitmap.width(), bitmap.height()). + + Destination SkRect corners are (x, y) and + (imageInfo().width(), imageInfo().height()). + + Copies each readable pixel intersecting both rectangles, without scaling, + converting to imageInfo().colorType() and imageInfo().alphaType() if required. + + Pixels are writable when SkBaseDevice is raster, or backed by a GPU. + Pixels are not writable when SkCanvas is returned by SkDocument::beginPage, + returned by SkPictureRecorder::beginRecording, or SkCanvas is the base of a utility + class like DebugCanvas. + + Pixel values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination rectangles + are copied. SkCanvas pixels outside SkRect intersection are unchanged. + + Pass negative values for x or y to offset pixels to the left or + above SkCanvas pixels. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - bitmap does not have allocated pixels. + - bitmap pixels could not be converted to SkCanvas imageInfo().colorType() or + imageInfo().alphaType(). + - SkCanvas pixels are not writable; for instance, SkCanvas is document based. + - bitmap pixels are inaccessible; for instance, bitmap wraps a texture. + + @param bitmap contains pixels copied to SkCanvas + @param x offset into SkCanvas writable pixels on x-axis; may be negative + @param y offset into SkCanvas writable pixels on y-axis; may be negative + @return true if pixels were written to SkCanvas + + example: https://fiddle.skia.org/c/@Canvas_writePixels_2 + example: https://fiddle.skia.org/c/@State_Stack_a + example: https://fiddle.skia.org/c/@State_Stack_b + */ + bool writePixels(const SkBitmap& bitmap, int x, int y); + + /** Saves SkMatrix and clip. + Calling restore() discards changes to SkMatrix and clip, + restoring the SkMatrix and clip to their state when save() was called. + + SkMatrix may be changed by translate(), scale(), rotate(), skew(), concat(), setMatrix(), + and resetMatrix(). Clip may be changed by clipRect(), clipRRect(), clipPath(), clipRegion(). + + Saved SkCanvas state is put on a stack; multiple calls to save() should be balance + by an equal number of calls to restore(). + + Call restoreToCount() with result to restore this and subsequent saves. + + @return depth of saved stack + + example: https://fiddle.skia.org/c/@Canvas_save + */ + int save(); + + /** Saves SkMatrix and clip, and allocates a SkSurface for subsequent drawing. + Calling restore() discards changes to SkMatrix and clip, and draws the SkSurface. + + SkMatrix may be changed by translate(), scale(), rotate(), skew(), concat(), + setMatrix(), and resetMatrix(). Clip may be changed by clipRect(), clipRRect(), + clipPath(), clipRegion(). + + SkRect bounds suggests but does not define the SkSurface size. To clip drawing to + a specific rectangle, use clipRect(). + + Optional SkPaint paint applies alpha, SkColorFilter, SkImageFilter, and + SkBlendMode when restore() is called. + + Call restoreToCount() with returned value to restore this and subsequent saves. + + @param bounds hint to limit the size of the layer; may be nullptr + @param paint graphics state for layer; may be nullptr + @return depth of saved stack + + example: https://fiddle.skia.org/c/@Canvas_saveLayer + example: https://fiddle.skia.org/c/@Canvas_saveLayer_4 + */ + int saveLayer(const SkRect* bounds, const SkPaint* paint); + + /** Saves SkMatrix and clip, and allocates a SkSurface for subsequent drawing. + Calling restore() discards changes to SkMatrix and clip, and draws the SkSurface. + + SkMatrix may be changed by translate(), scale(), rotate(), skew(), concat(), + setMatrix(), and resetMatrix(). Clip may be changed by clipRect(), clipRRect(), + clipPath(), clipRegion(). + + SkRect bounds suggests but does not define the layer size. To clip drawing to + a specific rectangle, use clipRect(). + + Optional SkPaint paint applies alpha, SkColorFilter, SkImageFilter, and + SkBlendMode when restore() is called. + + Call restoreToCount() with returned value to restore this and subsequent saves. + + @param bounds hint to limit the size of layer; may be nullptr + @param paint graphics state for layer; may be nullptr + @return depth of saved stack + */ + int saveLayer(const SkRect& bounds, const SkPaint* paint) { + return this->saveLayer(&bounds, paint); + } + + /** Saves SkMatrix and clip, and allocates SkSurface for subsequent drawing. + + Calling restore() discards changes to SkMatrix and clip, + and blends layer with alpha opacity onto prior layer. + + SkMatrix may be changed by translate(), scale(), rotate(), skew(), concat(), + setMatrix(), and resetMatrix(). Clip may be changed by clipRect(), clipRRect(), + clipPath(), clipRegion(). + + SkRect bounds suggests but does not define layer size. To clip drawing to + a specific rectangle, use clipRect(). + + alpha of zero is fully transparent, 1.0f is fully opaque. + + Call restoreToCount() with returned value to restore this and subsequent saves. + + @param bounds hint to limit the size of layer; may be nullptr + @param alpha opacity of layer + @return depth of saved stack + + example: https://fiddle.skia.org/c/@Canvas_saveLayerAlpha + */ + int saveLayerAlphaf(const SkRect* bounds, float alpha); + // Helper that accepts an int between 0 and 255, and divides it by 255.0 + int saveLayerAlpha(const SkRect* bounds, U8CPU alpha) { + return this->saveLayerAlphaf(bounds, alpha * (1.0f / 255)); + } + + /** \enum SkCanvas::SaveLayerFlagsSet + SaveLayerFlags provides options that may be used in any combination in SaveLayerRec, + defining how layer allocated by saveLayer() operates. It may be set to zero, + kPreserveLCDText_SaveLayerFlag, kInitWithPrevious_SaveLayerFlag, or both flags. + */ + enum SaveLayerFlagsSet { + kPreserveLCDText_SaveLayerFlag = 1 << 1, + kInitWithPrevious_SaveLayerFlag = 1 << 2, //!< initializes with previous contents + // instead of matching previous layer's colortype, use F16 + kF16ColorType = 1 << 4, + }; + + typedef uint32_t SaveLayerFlags; + + /** \struct SkCanvas::SaveLayerRec + SaveLayerRec contains the state used to create the layer. + */ + struct SaveLayerRec { + /** Sets fBounds, fPaint, and fBackdrop to nullptr. Clears fSaveLayerFlags. + + @return empty SaveLayerRec + */ + SaveLayerRec() {} + + /** Sets fBounds, fPaint, and fSaveLayerFlags; sets fBackdrop to nullptr. + + @param bounds layer dimensions; may be nullptr + @param paint applied to layer when overlaying prior layer; may be nullptr + @param saveLayerFlags SaveLayerRec options to modify layer + @return SaveLayerRec with empty fBackdrop + */ + SaveLayerRec(const SkRect* bounds, const SkPaint* paint, SaveLayerFlags saveLayerFlags = 0) + : SaveLayerRec(bounds, paint, nullptr, 1.f, saveLayerFlags) {} + + /** Sets fBounds, fPaint, fBackdrop, and fSaveLayerFlags. + + @param bounds layer dimensions; may be nullptr + @param paint applied to layer when overlaying prior layer; + may be nullptr + @param backdrop If not null, this causes the current layer to be filtered by + backdrop, and then drawn into the new layer + (respecting the current clip). + If null, the new layer is initialized with transparent-black. + @param saveLayerFlags SaveLayerRec options to modify layer + @return SaveLayerRec fully specified + */ + SaveLayerRec(const SkRect* bounds, const SkPaint* paint, const SkImageFilter* backdrop, + SaveLayerFlags saveLayerFlags) + : SaveLayerRec(bounds, paint, backdrop, 1.f, saveLayerFlags) {} + + /** hints at layer size limit */ + const SkRect* fBounds = nullptr; + + /** modifies overlay */ + const SkPaint* fPaint = nullptr; + + /** + * If not null, this triggers the same initialization behavior as setting + * kInitWithPrevious_SaveLayerFlag on fSaveLayerFlags: the current layer is copied into + * the new layer, rather than initializing the new layer with transparent-black. + * This is then filtered by fBackdrop (respecting the current clip). + */ + const SkImageFilter* fBackdrop = nullptr; + + /** preserves LCD text, creates with prior layer contents */ + SaveLayerFlags fSaveLayerFlags = 0; + + private: + friend class SkCanvas; + friend class SkCanvasPriv; + + SaveLayerRec(const SkRect* bounds, const SkPaint* paint, const SkImageFilter* backdrop, + SkScalar backdropScale, SaveLayerFlags saveLayerFlags) + : fBounds(bounds) + , fPaint(paint) + , fBackdrop(backdrop) + , fSaveLayerFlags(saveLayerFlags) + , fExperimentalBackdropScale(backdropScale) {} + + // Relative scale factor that the image content used to initialize the layer when the + // kInitFromPrevious flag or a backdrop filter is used. + SkScalar fExperimentalBackdropScale = 1.f; + }; + + /** Saves SkMatrix and clip, and allocates SkSurface for subsequent drawing. + + Calling restore() discards changes to SkMatrix and clip, + and blends SkSurface with alpha opacity onto the prior layer. + + SkMatrix may be changed by translate(), scale(), rotate(), skew(), concat(), + setMatrix(), and resetMatrix(). Clip may be changed by clipRect(), clipRRect(), + clipPath(), clipRegion(). + + SaveLayerRec contains the state used to create the layer. + + Call restoreToCount() with returned value to restore this and subsequent saves. + + @param layerRec layer state + @return depth of save state stack before this call was made. + + example: https://fiddle.skia.org/c/@Canvas_saveLayer_3 + */ + int saveLayer(const SaveLayerRec& layerRec); + + /** Removes changes to SkMatrix and clip since SkCanvas state was + last saved. The state is removed from the stack. + + Does nothing if the stack is empty. + + example: https://fiddle.skia.org/c/@AutoCanvasRestore_restore + + example: https://fiddle.skia.org/c/@Canvas_restore + */ + void restore(); + + /** Returns the number of saved states, each containing: SkMatrix and clip. + Equals the number of save() calls less the number of restore() calls plus one. + The save count of a new canvas is one. + + @return depth of save state stack + + example: https://fiddle.skia.org/c/@Canvas_getSaveCount + */ + int getSaveCount() const; + + /** Restores state to SkMatrix and clip values when save(), saveLayer(), + saveLayerPreserveLCDTextRequests(), or saveLayerAlpha() returned saveCount. + + Does nothing if saveCount is greater than state stack count. + Restores state to initial values if saveCount is less than or equal to one. + + @param saveCount depth of state stack to restore + + example: https://fiddle.skia.org/c/@Canvas_restoreToCount + */ + void restoreToCount(int saveCount); + + /** Translates SkMatrix by dx along the x-axis and dy along the y-axis. + + Mathematically, replaces SkMatrix with a translation matrix + premultiplied with SkMatrix. + + This has the effect of moving the drawing by (dx, dy) before transforming + the result with SkMatrix. + + @param dx distance to translate on x-axis + @param dy distance to translate on y-axis + + example: https://fiddle.skia.org/c/@Canvas_translate + */ + void translate(SkScalar dx, SkScalar dy); + + /** Scales SkMatrix by sx on the x-axis and sy on the y-axis. + + Mathematically, replaces SkMatrix with a scale matrix + premultiplied with SkMatrix. + + This has the effect of scaling the drawing by (sx, sy) before transforming + the result with SkMatrix. + + @param sx amount to scale on x-axis + @param sy amount to scale on y-axis + + example: https://fiddle.skia.org/c/@Canvas_scale + */ + void scale(SkScalar sx, SkScalar sy); + + /** Rotates SkMatrix by degrees. Positive degrees rotates clockwise. + + Mathematically, replaces SkMatrix with a rotation matrix + premultiplied with SkMatrix. + + This has the effect of rotating the drawing by degrees before transforming + the result with SkMatrix. + + @param degrees amount to rotate, in degrees + + example: https://fiddle.skia.org/c/@Canvas_rotate + */ + void rotate(SkScalar degrees); + + /** Rotates SkMatrix by degrees about a point at (px, py). Positive degrees rotates + clockwise. + + Mathematically, constructs a rotation matrix; premultiplies the rotation matrix by + a translation matrix; then replaces SkMatrix with the resulting matrix + premultiplied with SkMatrix. + + This has the effect of rotating the drawing about a given point before + transforming the result with SkMatrix. + + @param degrees amount to rotate, in degrees + @param px x-axis value of the point to rotate about + @param py y-axis value of the point to rotate about + + example: https://fiddle.skia.org/c/@Canvas_rotate_2 + */ + void rotate(SkScalar degrees, SkScalar px, SkScalar py); + + /** Skews SkMatrix by sx on the x-axis and sy on the y-axis. A positive value of sx + skews the drawing right as y-axis values increase; a positive value of sy skews + the drawing down as x-axis values increase. + + Mathematically, replaces SkMatrix with a skew matrix premultiplied with SkMatrix. + + This has the effect of skewing the drawing by (sx, sy) before transforming + the result with SkMatrix. + + @param sx amount to skew on x-axis + @param sy amount to skew on y-axis + + example: https://fiddle.skia.org/c/@Canvas_skew + */ + void skew(SkScalar sx, SkScalar sy); + + /** Replaces SkMatrix with matrix premultiplied with existing SkMatrix. + + This has the effect of transforming the drawn geometry by matrix, before + transforming the result with existing SkMatrix. + + @param matrix matrix to premultiply with existing SkMatrix + + example: https://fiddle.skia.org/c/@Canvas_concat + */ + void concat(const SkMatrix& matrix); + void concat(const SkM44&); + + /** Replaces SkMatrix with matrix. + Unlike concat(), any prior matrix state is overwritten. + + @param matrix matrix to copy, replacing existing SkMatrix + + example: https://fiddle.skia.org/c/@Canvas_setMatrix + */ + void setMatrix(const SkM44& matrix); + + // DEPRECATED -- use SkM44 version + void setMatrix(const SkMatrix& matrix); + + /** Sets SkMatrix to the identity matrix. + Any prior matrix state is overwritten. + + example: https://fiddle.skia.org/c/@Canvas_resetMatrix + */ + void resetMatrix(); + + /** Replaces clip with the intersection or difference of clip and rect, + with an aliased or anti-aliased clip edge. rect is transformed by SkMatrix + before it is combined with clip. + + @param rect SkRect to combine with clip + @param op SkClipOp to apply to clip + @param doAntiAlias true if clip is to be anti-aliased + + example: https://fiddle.skia.org/c/@Canvas_clipRect + */ + void clipRect(const SkRect& rect, SkClipOp op, bool doAntiAlias); + + /** Replaces clip with the intersection or difference of clip and rect. + Resulting clip is aliased; pixels are fully contained by the clip. + rect is transformed by SkMatrix before it is combined with clip. + + @param rect SkRect to combine with clip + @param op SkClipOp to apply to clip + */ + void clipRect(const SkRect& rect, SkClipOp op) { + this->clipRect(rect, op, false); + } + + /** Replaces clip with the intersection of clip and rect. + Resulting clip is aliased; pixels are fully contained by the clip. + rect is transformed by SkMatrix + before it is combined with clip. + + @param rect SkRect to combine with clip + @param doAntiAlias true if clip is to be anti-aliased + */ + void clipRect(const SkRect& rect, bool doAntiAlias = false) { + this->clipRect(rect, SkClipOp::kIntersect, doAntiAlias); + } + + void clipIRect(const SkIRect& irect, SkClipOp op = SkClipOp::kIntersect) { + this->clipRect(SkRect::Make(irect), op, false); + } + + /** Sets the maximum clip rectangle, which can be set by clipRect(), clipRRect() and + clipPath() and intersect the current clip with the specified rect. + The maximum clip affects only future clipping operations; it is not retroactive. + The clip restriction is not recorded in pictures. + + Pass an empty rect to disable maximum clip. + This private API is for use by Android framework only. + + DEPRECATED: Replace usage with SkAndroidFrameworkUtils::replaceClip() + + @param rect maximum allowed clip in device coordinates + */ + void androidFramework_setDeviceClipRestriction(const SkIRect& rect); + + /** Replaces clip with the intersection or difference of clip and rrect, + with an aliased or anti-aliased clip edge. + rrect is transformed by SkMatrix + before it is combined with clip. + + @param rrect SkRRect to combine with clip + @param op SkClipOp to apply to clip + @param doAntiAlias true if clip is to be anti-aliased + + example: https://fiddle.skia.org/c/@Canvas_clipRRect + */ + void clipRRect(const SkRRect& rrect, SkClipOp op, bool doAntiAlias); + + /** Replaces clip with the intersection or difference of clip and rrect. + Resulting clip is aliased; pixels are fully contained by the clip. + rrect is transformed by SkMatrix before it is combined with clip. + + @param rrect SkRRect to combine with clip + @param op SkClipOp to apply to clip + */ + void clipRRect(const SkRRect& rrect, SkClipOp op) { + this->clipRRect(rrect, op, false); + } + + /** Replaces clip with the intersection of clip and rrect, + with an aliased or anti-aliased clip edge. + rrect is transformed by SkMatrix before it is combined with clip. + + @param rrect SkRRect to combine with clip + @param doAntiAlias true if clip is to be anti-aliased + */ + void clipRRect(const SkRRect& rrect, bool doAntiAlias = false) { + this->clipRRect(rrect, SkClipOp::kIntersect, doAntiAlias); + } + + /** Replaces clip with the intersection or difference of clip and path, + with an aliased or anti-aliased clip edge. SkPath::FillType determines if path + describes the area inside or outside its contours; and if path contour overlaps + itself or another path contour, whether the overlaps form part of the area. + path is transformed by SkMatrix before it is combined with clip. + + @param path SkPath to combine with clip + @param op SkClipOp to apply to clip + @param doAntiAlias true if clip is to be anti-aliased + + example: https://fiddle.skia.org/c/@Canvas_clipPath + */ + void clipPath(const SkPath& path, SkClipOp op, bool doAntiAlias); + + /** Replaces clip with the intersection or difference of clip and path. + Resulting clip is aliased; pixels are fully contained by the clip. + SkPath::FillType determines if path + describes the area inside or outside its contours; and if path contour overlaps + itself or another path contour, whether the overlaps form part of the area. + path is transformed by SkMatrix + before it is combined with clip. + + @param path SkPath to combine with clip + @param op SkClipOp to apply to clip + */ + void clipPath(const SkPath& path, SkClipOp op) { + this->clipPath(path, op, false); + } + + /** Replaces clip with the intersection of clip and path. + Resulting clip is aliased; pixels are fully contained by the clip. + SkPath::FillType determines if path + describes the area inside or outside its contours; and if path contour overlaps + itself or another path contour, whether the overlaps form part of the area. + path is transformed by SkMatrix before it is combined with clip. + + @param path SkPath to combine with clip + @param doAntiAlias true if clip is to be anti-aliased + */ + void clipPath(const SkPath& path, bool doAntiAlias = false) { + this->clipPath(path, SkClipOp::kIntersect, doAntiAlias); + } + + void clipShader(sk_sp, SkClipOp = SkClipOp::kIntersect); + + /** Replaces clip with the intersection or difference of clip and SkRegion deviceRgn. + Resulting clip is aliased; pixels are fully contained by the clip. + deviceRgn is unaffected by SkMatrix. + + @param deviceRgn SkRegion to combine with clip + @param op SkClipOp to apply to clip + + example: https://fiddle.skia.org/c/@Canvas_clipRegion + */ + void clipRegion(const SkRegion& deviceRgn, SkClipOp op = SkClipOp::kIntersect); + + /** Returns true if SkRect rect, transformed by SkMatrix, can be quickly determined to be + outside of clip. May return false even though rect is outside of clip. + + Use to check if an area to be drawn is clipped out, to skip subsequent draw calls. + + @param rect SkRect to compare with clip + @return true if rect, transformed by SkMatrix, does not intersect clip + + example: https://fiddle.skia.org/c/@Canvas_quickReject + */ + bool quickReject(const SkRect& rect) const; + + /** Returns true if path, transformed by SkMatrix, can be quickly determined to be + outside of clip. May return false even though path is outside of clip. + + Use to check if an area to be drawn is clipped out, to skip subsequent draw calls. + + @param path SkPath to compare with clip + @return true if path, transformed by SkMatrix, does not intersect clip + + example: https://fiddle.skia.org/c/@Canvas_quickReject_2 + */ + bool quickReject(const SkPath& path) const; + + /** Returns bounds of clip, transformed by inverse of SkMatrix. If clip is empty, + return SkRect::MakeEmpty, where all SkRect sides equal zero. + + SkRect returned is outset by one to account for partial pixel coverage if clip + is anti-aliased. + + @return bounds of clip in local coordinates + + example: https://fiddle.skia.org/c/@Canvas_getLocalClipBounds + */ + SkRect getLocalClipBounds() const; + + /** Returns bounds of clip, transformed by inverse of SkMatrix. If clip is empty, + return false, and set bounds to SkRect::MakeEmpty, where all SkRect sides equal zero. + + bounds is outset by one to account for partial pixel coverage if clip + is anti-aliased. + + @param bounds SkRect of clip in local coordinates + @return true if clip bounds is not empty + */ + bool getLocalClipBounds(SkRect* bounds) const { + *bounds = this->getLocalClipBounds(); + return !bounds->isEmpty(); + } + + /** Returns SkIRect bounds of clip, unaffected by SkMatrix. If clip is empty, + return SkRect::MakeEmpty, where all SkRect sides equal zero. + + Unlike getLocalClipBounds(), returned SkIRect is not outset. + + @return bounds of clip in SkBaseDevice coordinates + + example: https://fiddle.skia.org/c/@Canvas_getDeviceClipBounds + */ + SkIRect getDeviceClipBounds() const; + + /** Returns SkIRect bounds of clip, unaffected by SkMatrix. If clip is empty, + return false, and set bounds to SkRect::MakeEmpty, where all SkRect sides equal zero. + + Unlike getLocalClipBounds(), bounds is not outset. + + @param bounds SkRect of clip in device coordinates + @return true if clip bounds is not empty + */ + bool getDeviceClipBounds(SkIRect* bounds) const { + *bounds = this->getDeviceClipBounds(); + return !bounds->isEmpty(); + } + + /** Fills clip with color color. + mode determines how ARGB is combined with destination. + + @param color unpremultiplied ARGB + @param mode SkBlendMode used to combine source color and destination + + example: https://fiddle.skia.org/c/@Canvas_drawColor + */ + void drawColor(SkColor color, SkBlendMode mode = SkBlendMode::kSrcOver) { + this->drawColor(SkColor4f::FromColor(color), mode); + } + + /** Fills clip with color color. + mode determines how ARGB is combined with destination. + + @param color SkColor4f representing unpremultiplied color. + @param mode SkBlendMode used to combine source color and destination + */ + void drawColor(const SkColor4f& color, SkBlendMode mode = SkBlendMode::kSrcOver); + + /** Fills clip with color color using SkBlendMode::kSrc. + This has the effect of replacing all pixels contained by clip with color. + + @param color unpremultiplied ARGB + */ + void clear(SkColor color) { + this->clear(SkColor4f::FromColor(color)); + } + + /** Fills clip with color color using SkBlendMode::kSrc. + This has the effect of replacing all pixels contained by clip with color. + + @param color SkColor4f representing unpremultiplied color. + */ + void clear(const SkColor4f& color) { + this->drawColor(color, SkBlendMode::kSrc); + } + + /** Makes SkCanvas contents undefined. Subsequent calls that read SkCanvas pixels, + such as drawing with SkBlendMode, return undefined results. discard() does + not change clip or SkMatrix. + + discard() may do nothing, depending on the implementation of SkSurface or SkBaseDevice + that created SkCanvas. + + discard() allows optimized performance on subsequent draws by removing + cached data associated with SkSurface or SkBaseDevice. + It is not necessary to call discard() once done with SkCanvas; + any cached data is deleted when owning SkSurface or SkBaseDevice is deleted. + */ + void discard() { this->onDiscard(); } + + /** Fills clip with SkPaint paint. SkPaint components, SkShader, + SkColorFilter, SkImageFilter, and SkBlendMode affect drawing; + SkMaskFilter and SkPathEffect in paint are ignored. + + @param paint graphics state used to fill SkCanvas + + example: https://fiddle.skia.org/c/@Canvas_drawPaint + */ + void drawPaint(const SkPaint& paint); + + /** \enum SkCanvas::PointMode + Selects if an array of points are drawn as discrete points, as lines, or as + an open polygon. + */ + enum PointMode { + kPoints_PointMode, //!< draw each point separately + kLines_PointMode, //!< draw each pair of points as a line segment + kPolygon_PointMode, //!< draw the array of points as a open polygon + }; + + /** Draws pts using clip, SkMatrix and SkPaint paint. + count is the number of points; if count is less than one, has no effect. + mode may be one of: kPoints_PointMode, kLines_PointMode, or kPolygon_PointMode. + + If mode is kPoints_PointMode, the shape of point drawn depends on paint + SkPaint::Cap. If paint is set to SkPaint::kRound_Cap, each point draws a + circle of diameter SkPaint stroke width. If paint is set to SkPaint::kSquare_Cap + or SkPaint::kButt_Cap, each point draws a square of width and height + SkPaint stroke width. + + If mode is kLines_PointMode, each pair of points draws a line segment. + One line is drawn for every two points; each point is used once. If count is odd, + the final point is ignored. + + If mode is kPolygon_PointMode, each adjacent pair of points draws a line segment. + count minus one lines are drawn; the first and last point are used once. + + Each line segment respects paint SkPaint::Cap and SkPaint stroke width. + SkPaint::Style is ignored, as if were set to SkPaint::kStroke_Style. + + Always draws each element one at a time; is not affected by + SkPaint::Join, and unlike drawPath(), does not create a mask from all points + and lines before drawing. + + @param mode whether pts draws points or lines + @param count number of points in the array + @param pts array of points to draw + @param paint stroke, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawPoints + */ + void drawPoints(PointMode mode, size_t count, const SkPoint pts[], const SkPaint& paint); + + /** Draws point at (x, y) using clip, SkMatrix and SkPaint paint. + + The shape of point drawn depends on paint SkPaint::Cap. + If paint is set to SkPaint::kRound_Cap, draw a circle of diameter + SkPaint stroke width. If paint is set to SkPaint::kSquare_Cap or SkPaint::kButt_Cap, + draw a square of width and height SkPaint stroke width. + SkPaint::Style is ignored, as if were set to SkPaint::kStroke_Style. + + @param x left edge of circle or square + @param y top edge of circle or square + @param paint stroke, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawPoint + */ + void drawPoint(SkScalar x, SkScalar y, const SkPaint& paint); + + /** Draws point p using clip, SkMatrix and SkPaint paint. + + The shape of point drawn depends on paint SkPaint::Cap. + If paint is set to SkPaint::kRound_Cap, draw a circle of diameter + SkPaint stroke width. If paint is set to SkPaint::kSquare_Cap or SkPaint::kButt_Cap, + draw a square of width and height SkPaint stroke width. + SkPaint::Style is ignored, as if were set to SkPaint::kStroke_Style. + + @param p top-left edge of circle or square + @param paint stroke, blend, color, and so on, used to draw + */ + void drawPoint(SkPoint p, const SkPaint& paint) { + this->drawPoint(p.x(), p.y(), paint); + } + + /** Draws line segment from (x0, y0) to (x1, y1) using clip, SkMatrix, and SkPaint paint. + In paint: SkPaint stroke width describes the line thickness; + SkPaint::Cap draws the end rounded or square; + SkPaint::Style is ignored, as if were set to SkPaint::kStroke_Style. + + @param x0 start of line segment on x-axis + @param y0 start of line segment on y-axis + @param x1 end of line segment on x-axis + @param y1 end of line segment on y-axis + @param paint stroke, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawLine + */ + void drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, const SkPaint& paint); + + /** Draws line segment from p0 to p1 using clip, SkMatrix, and SkPaint paint. + In paint: SkPaint stroke width describes the line thickness; + SkPaint::Cap draws the end rounded or square; + SkPaint::Style is ignored, as if were set to SkPaint::kStroke_Style. + + @param p0 start of line segment + @param p1 end of line segment + @param paint stroke, blend, color, and so on, used to draw + */ + void drawLine(SkPoint p0, SkPoint p1, const SkPaint& paint) { + this->drawLine(p0.x(), p0.y(), p1.x(), p1.y(), paint); + } + + /** Draws SkRect rect using clip, SkMatrix, and SkPaint paint. + In paint: SkPaint::Style determines if rectangle is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness, and + SkPaint::Join draws the corners rounded or square. + + @param rect rectangle to draw + @param paint stroke or fill, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawRect + */ + void drawRect(const SkRect& rect, const SkPaint& paint); + + /** Draws SkIRect rect using clip, SkMatrix, and SkPaint paint. + In paint: SkPaint::Style determines if rectangle is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness, and + SkPaint::Join draws the corners rounded or square. + + @param rect rectangle to draw + @param paint stroke or fill, blend, color, and so on, used to draw + */ + void drawIRect(const SkIRect& rect, const SkPaint& paint) { + SkRect r; + r.set(rect); // promotes the ints to scalars + this->drawRect(r, paint); + } + + /** Draws SkRegion region using clip, SkMatrix, and SkPaint paint. + In paint: SkPaint::Style determines if rectangle is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness, and + SkPaint::Join draws the corners rounded or square. + + @param region region to draw + @param paint SkPaint stroke or fill, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawRegion + */ + void drawRegion(const SkRegion& region, const SkPaint& paint); + + /** Draws oval oval using clip, SkMatrix, and SkPaint. + In paint: SkPaint::Style determines if oval is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness. + + @param oval SkRect bounds of oval + @param paint SkPaint stroke or fill, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawOval + */ + void drawOval(const SkRect& oval, const SkPaint& paint); + + /** Draws SkRRect rrect using clip, SkMatrix, and SkPaint paint. + In paint: SkPaint::Style determines if rrect is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness. + + rrect may represent a rectangle, circle, oval, uniformly rounded rectangle, or + may have any combination of positive non-square radii for the four corners. + + @param rrect SkRRect with up to eight corner radii to draw + @param paint SkPaint stroke or fill, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawRRect + */ + void drawRRect(const SkRRect& rrect, const SkPaint& paint); + + /** Draws SkRRect outer and inner + using clip, SkMatrix, and SkPaint paint. + outer must contain inner or the drawing is undefined. + In paint: SkPaint::Style determines if SkRRect is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness. + If stroked and SkRRect corner has zero length radii, SkPaint::Join can + draw corners rounded or square. + + GPU-backed platforms optimize drawing when both outer and inner are + concave and outer contains inner. These platforms may not be able to draw + SkPath built with identical data as fast. + + @param outer SkRRect outer bounds to draw + @param inner SkRRect inner bounds to draw + @param paint SkPaint stroke or fill, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawDRRect_a + example: https://fiddle.skia.org/c/@Canvas_drawDRRect_b + */ + void drawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint); + + /** Draws circle at (cx, cy) with radius using clip, SkMatrix, and SkPaint paint. + If radius is zero or less, nothing is drawn. + In paint: SkPaint::Style determines if circle is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness. + + @param cx circle center on the x-axis + @param cy circle center on the y-axis + @param radius half the diameter of circle + @param paint SkPaint stroke or fill, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawCircle + */ + void drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, const SkPaint& paint); + + /** Draws circle at center with radius using clip, SkMatrix, and SkPaint paint. + If radius is zero or less, nothing is drawn. + In paint: SkPaint::Style determines if circle is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness. + + @param center circle center + @param radius half the diameter of circle + @param paint SkPaint stroke or fill, blend, color, and so on, used to draw + */ + void drawCircle(SkPoint center, SkScalar radius, const SkPaint& paint) { + this->drawCircle(center.x(), center.y(), radius, paint); + } + + /** Draws arc using clip, SkMatrix, and SkPaint paint. + + Arc is part of oval bounded by oval, sweeping from startAngle to startAngle plus + sweepAngle. startAngle and sweepAngle are in degrees. + + startAngle of zero places start point at the right middle edge of oval. + A positive sweepAngle places arc end point clockwise from start point; + a negative sweepAngle places arc end point counterclockwise from start point. + sweepAngle may exceed 360 degrees, a full circle. + If useCenter is true, draw a wedge that includes lines from oval + center to arc end points. If useCenter is false, draw arc between end points. + + If SkRect oval is empty or sweepAngle is zero, nothing is drawn. + + @param oval SkRect bounds of oval containing arc to draw + @param startAngle angle in degrees where arc begins + @param sweepAngle sweep angle in degrees; positive is clockwise + @param useCenter if true, include the center of the oval + @param paint SkPaint stroke or fill, blend, color, and so on, used to draw + */ + void drawArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, + bool useCenter, const SkPaint& paint); + + /** Draws SkRRect bounded by SkRect rect, with corner radii (rx, ry) using clip, + SkMatrix, and SkPaint paint. + + In paint: SkPaint::Style determines if SkRRect is stroked or filled; + if stroked, SkPaint stroke width describes the line thickness. + If rx or ry are less than zero, they are treated as if they are zero. + If rx plus ry exceeds rect width or rect height, radii are scaled down to fit. + If rx and ry are zero, SkRRect is drawn as SkRect and if stroked is affected by + SkPaint::Join. + + @param rect SkRect bounds of SkRRect to draw + @param rx axis length on x-axis of oval describing rounded corners + @param ry axis length on y-axis of oval describing rounded corners + @param paint stroke, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawRoundRect + */ + void drawRoundRect(const SkRect& rect, SkScalar rx, SkScalar ry, const SkPaint& paint); + + /** Draws SkPath path using clip, SkMatrix, and SkPaint paint. + SkPath contains an array of path contour, each of which may be open or closed. + + In paint: SkPaint::Style determines if SkRRect is stroked or filled: + if filled, SkPath::FillType determines whether path contour describes inside or + outside of fill; if stroked, SkPaint stroke width describes the line thickness, + SkPaint::Cap describes line ends, and SkPaint::Join describes how + corners are drawn. + + @param path SkPath to draw + @param paint stroke, blend, color, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawPath + */ + void drawPath(const SkPath& path, const SkPaint& paint); + + void drawImage(const SkImage* image, SkScalar left, SkScalar top) { + this->drawImage(image, left, top, SkSamplingOptions(), nullptr); + } + void drawImage(const sk_sp& image, SkScalar left, SkScalar top) { + this->drawImage(image.get(), left, top, SkSamplingOptions(), nullptr); + } + + /** \enum SkCanvas::SrcRectConstraint + SrcRectConstraint controls the behavior at the edge of source SkRect, + provided to drawImageRect() when there is any filtering. If kStrict is set, + then extra code is used to ensure it never samples outside of the src-rect. + kStrict_SrcRectConstraint disables the use of mipmaps and anisotropic filtering. + */ + enum SrcRectConstraint { + kStrict_SrcRectConstraint, //!< sample only inside bounds; slower + kFast_SrcRectConstraint, //!< sample outside bounds; faster + }; + + void drawImage(const SkImage*, SkScalar x, SkScalar y, const SkSamplingOptions&, + const SkPaint* = nullptr); + void drawImage(const sk_sp& image, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint = nullptr) { + this->drawImage(image.get(), x, y, sampling, paint); + } + void drawImageRect(const SkImage*, const SkRect& src, const SkRect& dst, + const SkSamplingOptions&, const SkPaint*, SrcRectConstraint); + void drawImageRect(const SkImage*, const SkRect& dst, const SkSamplingOptions&, + const SkPaint* = nullptr); + void drawImageRect(const sk_sp& image, const SkRect& src, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint* paint, + SrcRectConstraint constraint) { + this->drawImageRect(image.get(), src, dst, sampling, paint, constraint); + } + void drawImageRect(const sk_sp& image, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint* paint = nullptr) { + this->drawImageRect(image.get(), dst, sampling, paint); + } + + /** Draws SkImage image stretched proportionally to fit into SkRect dst. + SkIRect center divides the image into nine sections: four sides, four corners, and + the center. Corners are unmodified or scaled down proportionately if their sides + are larger than dst; center and four sides are scaled to fit remaining space, if any. + + Additionally transform draw using clip, SkMatrix, and optional SkPaint paint. + + If SkPaint paint is supplied, apply SkColorFilter, alpha, SkImageFilter, and + SkBlendMode. If image is kAlpha_8_SkColorType, apply SkShader. + If paint contains SkMaskFilter, generate mask from image bounds. + Any SkMaskFilter on paint is ignored as is paint anti-aliasing state. + + If generated mask extends beyond image bounds, replicate image edge colors, just + as SkShader made from SkImage::makeShader with SkShader::kClamp_TileMode set + replicates the image edge color when it samples outside of its bounds. + + @param image SkImage containing pixels, dimensions, and format + @param center SkIRect edge of image corners and sides + @param dst destination SkRect of image to draw to + @param filter what technique to use when sampling the image + @param paint SkPaint containing SkBlendMode, SkColorFilter, SkImageFilter, + and so on; or nullptr + */ + void drawImageNine(const SkImage* image, const SkIRect& center, const SkRect& dst, + SkFilterMode filter, const SkPaint* paint = nullptr); + + /** \struct SkCanvas::Lattice + SkCanvas::Lattice divides SkBitmap or SkImage into a rectangular grid. + Grid entries on even columns and even rows are fixed; these entries are + always drawn at their original size if the destination is large enough. + If the destination side is too small to hold the fixed entries, all fixed + entries are proportionately scaled down to fit. + The grid entries not on even columns and rows are scaled to fit the + remaining space, if any. + */ + struct Lattice { + + /** \enum SkCanvas::Lattice::RectType + Optional setting per rectangular grid entry to make it transparent, + or to fill the grid entry with a color. + */ + enum RectType : uint8_t { + kDefault = 0, //!< draws SkBitmap into lattice rectangle + kTransparent, //!< skips lattice rectangle by making it transparent + kFixedColor, //!< draws one of fColors into lattice rectangle + }; + + const int* fXDivs; //!< x-axis values dividing bitmap + const int* fYDivs; //!< y-axis values dividing bitmap + const RectType* fRectTypes; //!< array of fill types + int fXCount; //!< number of x-coordinates + int fYCount; //!< number of y-coordinates + const SkIRect* fBounds; //!< source bounds to draw from + const SkColor* fColors; //!< array of colors + }; + + /** Draws SkImage image stretched proportionally to fit into SkRect dst. + + SkCanvas::Lattice lattice divides image into a rectangular grid. + Each intersection of an even-numbered row and column is fixed; + fixed lattice elements never scale larger than their initial + size and shrink proportionately when all fixed elements exceed the bitmap + dimension. All other grid elements scale to fill the available space, if any. + + Additionally transform draw using clip, SkMatrix, and optional SkPaint paint. + + If SkPaint paint is supplied, apply SkColorFilter, alpha, SkImageFilter, and + SkBlendMode. If image is kAlpha_8_SkColorType, apply SkShader. + If paint contains SkMaskFilter, generate mask from image bounds. + Any SkMaskFilter on paint is ignored as is paint anti-aliasing state. + + If generated mask extends beyond bitmap bounds, replicate bitmap edge colors, + just as SkShader made from SkShader::MakeBitmapShader with + SkShader::kClamp_TileMode set replicates the bitmap edge color when it samples + outside of its bounds. + + @param image SkImage containing pixels, dimensions, and format + @param lattice division of bitmap into fixed and variable rectangles + @param dst destination SkRect of image to draw to + @param filter what technique to use when sampling the image + @param paint SkPaint containing SkBlendMode, SkColorFilter, SkImageFilter, + and so on; or nullptr + */ + void drawImageLattice(const SkImage* image, const Lattice& lattice, const SkRect& dst, + SkFilterMode filter, const SkPaint* paint = nullptr); + void drawImageLattice(const SkImage* image, const Lattice& lattice, const SkRect& dst) { + this->drawImageLattice(image, lattice, dst, SkFilterMode::kNearest, nullptr); + } + + /** + * Experimental. Controls anti-aliasing of each edge of images in an image-set. + */ + enum QuadAAFlags : unsigned { + kLeft_QuadAAFlag = 0b0001, + kTop_QuadAAFlag = 0b0010, + kRight_QuadAAFlag = 0b0100, + kBottom_QuadAAFlag = 0b1000, + + kNone_QuadAAFlags = 0b0000, + kAll_QuadAAFlags = 0b1111, + }; + + /** This is used by the experimental API below. */ + struct SK_API ImageSetEntry { + ImageSetEntry(sk_sp image, const SkRect& srcRect, const SkRect& dstRect, + int matrixIndex, float alpha, unsigned aaFlags, bool hasClip); + + ImageSetEntry(sk_sp image, const SkRect& srcRect, const SkRect& dstRect, + float alpha, unsigned aaFlags); + + ImageSetEntry(); + ~ImageSetEntry(); + ImageSetEntry(const ImageSetEntry&); + ImageSetEntry& operator=(const ImageSetEntry&); + + sk_sp fImage; + SkRect fSrcRect; + SkRect fDstRect; + int fMatrixIndex = -1; // Index into the preViewMatrices arg, or < 0 + float fAlpha = 1.f; + unsigned fAAFlags = kNone_QuadAAFlags; // QuadAAFlags + bool fHasClip = false; // True to use next 4 points in dstClip arg as quad + }; + + /** + * This is an experimental API for the SkiaRenderer Chromium project, and its API will surely + * evolve if it is not removed outright. + * + * This behaves very similarly to drawRect() combined with a clipPath() formed by clip + * quadrilateral. 'rect' and 'clip' are in the same coordinate space. If 'clip' is null, then it + * is as if the rectangle was not clipped (or, alternatively, clipped to itself). If not null, + * then it must provide 4 points. + * + * In addition to combining the draw and clipping into one operation, this function adds the + * additional capability of controlling each of the rectangle's edges anti-aliasing + * independently. The edges of the clip will respect the per-edge AA flags. It is required that + * 'clip' be contained inside 'rect'. In terms of mapping to edge labels, the 'clip' points + * should be ordered top-left, top-right, bottom-right, bottom-left so that the edge between [0] + * and [1] is "top", [1] and [2] is "right", [2] and [3] is "bottom", and [3] and [0] is "left". + * This ordering matches SkRect::toQuad(). + * + * This API only draws solid color, filled rectangles so it does not accept a full SkPaint. + */ + void experimental_DrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], QuadAAFlags aaFlags, + const SkColor4f& color, SkBlendMode mode); + void experimental_DrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], QuadAAFlags aaFlags, + SkColor color, SkBlendMode mode) { + this->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, SkColor4f::FromColor(color), mode); + } + + /** + * This is an bulk variant of experimental_DrawEdgeAAQuad() that renders 'cnt' textured quads. + * For each entry, 'fDstRect' is rendered with its clip (determined by entry's 'fHasClip' and + * the current index in 'dstClip'). The entry's fImage is applied to the destination rectangle + * by sampling from 'fSrcRect' sub-image. The corners of 'fSrcRect' map to the corners of + * 'fDstRect', just like in drawImageRect(), and they will be properly interpolated when + * applying a clip. + * + * Like experimental_DrawEdgeAAQuad(), each entry can specify edge AA flags that apply to both + * the destination rect and its clip. + * + * If provided, the 'dstClips' array must have length equal 4 * the number of entries with + * fHasClip true. If 'dstClips' is null, every entry must have 'fHasClip' set to false. The + * destination clip coordinates will be read consecutively with the image set entries, advancing + * by 4 points every time an entry with fHasClip is passed. + * + * This entry point supports per-entry manipulations to the canvas's current matrix. If an + * entry provides 'fMatrixIndex' >= 0, it will be drawn as if the canvas's CTM was + * canvas->getTotalMatrix() * preViewMatrices[fMatrixIndex]. If 'fMatrixIndex' is less than 0, + * the pre-view matrix transform is implicitly the identity, so it will be drawn using just the + * current canvas matrix. The pre-view matrix modifies the canvas's view matrix, it does not + * affect the local coordinates of each entry. + * + * An optional paint may be provided, which supports the same subset of features usable with + * drawImageRect (i.e. assumed to be filled and no path effects). When a paint is provided, the + * image set is drawn as if each image used the applied paint independently, so each is affected + * by the image, color, and/or mask filter. + */ + void experimental_DrawEdgeAAImageSet(const ImageSetEntry imageSet[], int cnt, + const SkPoint dstClips[], const SkMatrix preViewMatrices[], + const SkSamplingOptions&, const SkPaint* paint = nullptr, + SrcRectConstraint constraint = kStrict_SrcRectConstraint); + + /** Draws text, with origin at (x, y), using clip, SkMatrix, SkFont font, + and SkPaint paint. + + When encoding is SkTextEncoding::kUTF8, SkTextEncoding::kUTF16, or + SkTextEncoding::kUTF32, this function uses the default + character-to-glyph mapping from the SkTypeface in font. It does not + perform typeface fallback for characters not found in the SkTypeface. + It does not perform kerning or other complex shaping; glyphs are + positioned based on their default advances. + + Text meaning depends on SkTextEncoding. + + Text size is affected by SkMatrix and SkFont text size. Default text + size is 12 point. + + All elements of paint: SkPathEffect, SkMaskFilter, SkShader, + SkColorFilter, and SkImageFilter; apply to text. By + default, draws filled black glyphs. + + @param text character code points or glyphs drawn + @param byteLength byte length of text array + @param encoding text encoding used in the text array + @param x start of text on x-axis + @param y start of text on y-axis + @param font typeface, text size and so, used to describe the text + @param paint blend, color, and so on, used to draw + */ + void drawSimpleText(const void* text, size_t byteLength, SkTextEncoding encoding, + SkScalar x, SkScalar y, const SkFont& font, const SkPaint& paint); + + /** Draws null terminated string, with origin at (x, y), using clip, SkMatrix, + SkFont font, and SkPaint paint. + + This function uses the default character-to-glyph mapping from the + SkTypeface in font. It does not perform typeface fallback for + characters not found in the SkTypeface. It does not perform kerning; + glyphs are positioned based on their default advances. + + String str is encoded as UTF-8. + + Text size is affected by SkMatrix and font text size. Default text + size is 12 point. + + All elements of paint: SkPathEffect, SkMaskFilter, SkShader, + SkColorFilter, and SkImageFilter; apply to text. By + default, draws filled black glyphs. + + @param str character code points drawn, + ending with a char value of zero + @param x start of string on x-axis + @param y start of string on y-axis + @param font typeface, text size and so, used to describe the text + @param paint blend, color, and so on, used to draw + */ + void drawString(const char str[], SkScalar x, SkScalar y, const SkFont& font, + const SkPaint& paint) { + this->drawSimpleText(str, strlen(str), SkTextEncoding::kUTF8, x, y, font, paint); + } + + /** Draws SkString, with origin at (x, y), using clip, SkMatrix, SkFont font, + and SkPaint paint. + + This function uses the default character-to-glyph mapping from the + SkTypeface in font. It does not perform typeface fallback for + characters not found in the SkTypeface. It does not perform kerning; + glyphs are positioned based on their default advances. + + SkString str is encoded as UTF-8. + + Text size is affected by SkMatrix and SkFont text size. Default text + size is 12 point. + + All elements of paint: SkPathEffect, SkMaskFilter, SkShader, + SkColorFilter, and SkImageFilter; apply to text. By + default, draws filled black glyphs. + + @param str character code points drawn, + ending with a char value of zero + @param x start of string on x-axis + @param y start of string on y-axis + @param font typeface, text size and so, used to describe the text + @param paint blend, color, and so on, used to draw + */ + void drawString(const SkString& str, SkScalar x, SkScalar y, const SkFont& font, + const SkPaint& paint) { + this->drawSimpleText(str.c_str(), str.size(), SkTextEncoding::kUTF8, x, y, font, paint); + } + + /** Draws count glyphs, at positions relative to origin styled with font and paint with + supporting utf8 and cluster information. + + This function draw glyphs at the given positions relative to the given origin. + It does not perform typeface fallback for glyphs not found in the SkTypeface in font. + + The drawing obeys the current transform matrix and clipping. + + All elements of paint: SkPathEffect, SkMaskFilter, SkShader, + SkColorFilter, and SkImageFilter; apply to text. By + default, draws filled black glyphs. + + @param count number of glyphs to draw + @param glyphs the array of glyphIDs to draw + @param positions where to draw each glyph relative to origin + @param clusters array of size count of cluster information + @param textByteCount size of the utf8text + @param utf8text utf8text supporting information for the glyphs + @param origin the origin of all the positions + @param font typeface, text size and so, used to describe the text + @param paint blend, color, and so on, used to draw + */ + void drawGlyphs(int count, const SkGlyphID glyphs[], const SkPoint positions[], + const uint32_t clusters[], int textByteCount, const char utf8text[], + SkPoint origin, const SkFont& font, const SkPaint& paint); + + /** Draws count glyphs, at positions relative to origin styled with font and paint. + + This function draw glyphs at the given positions relative to the given origin. + It does not perform typeface fallback for glyphs not found in the SkTypeface in font. + + The drawing obeys the current transform matrix and clipping. + + All elements of paint: SkPathEffect, SkMaskFilter, SkShader, + SkColorFilter, and SkImageFilter; apply to text. By + default, draws filled black glyphs. + + @param count number of glyphs to draw + @param glyphs the array of glyphIDs to draw + @param positions where to draw each glyph relative to origin + @param origin the origin of all the positions + @param font typeface, text size and so, used to describe the text + @param paint blend, color, and so on, used to draw + */ + void drawGlyphs(int count, const SkGlyphID glyphs[], const SkPoint positions[], + SkPoint origin, const SkFont& font, const SkPaint& paint); + + /** Draws count glyphs, at positions relative to origin styled with font and paint. + + This function draw glyphs using the given scaling and rotations. They are positioned + relative to the given origin. It does not perform typeface fallback for glyphs not found + in the SkTypeface in font. + + The drawing obeys the current transform matrix and clipping. + + All elements of paint: SkPathEffect, SkMaskFilter, SkShader, + SkColorFilter, and SkImageFilter; apply to text. By + default, draws filled black glyphs. + + @param count number of glyphs to draw + @param glyphs the array of glyphIDs to draw + @param xforms where to draw and orient each glyph + @param origin the origin of all the positions + @param font typeface, text size and so, used to describe the text + @param paint blend, color, and so on, used to draw + */ + void drawGlyphs(int count, const SkGlyphID glyphs[], const SkRSXform xforms[], + SkPoint origin, const SkFont& font, const SkPaint& paint); + + /** Draws SkTextBlob blob at (x, y), using clip, SkMatrix, and SkPaint paint. + + blob contains glyphs, their positions, and paint attributes specific to text: + SkTypeface, SkPaint text size, SkPaint text scale x, + SkPaint text skew x, SkPaint::Align, SkPaint::Hinting, anti-alias, SkPaint fake bold, + SkPaint font embedded bitmaps, SkPaint full hinting spacing, LCD text, SkPaint linear text, + and SkPaint subpixel text. + + SkTextEncoding must be set to SkTextEncoding::kGlyphID. + + Elements of paint: anti-alias, SkBlendMode, color including alpha, + SkColorFilter, SkPaint dither, SkMaskFilter, SkPathEffect, SkShader, and + SkPaint::Style; apply to blob. If SkPaint contains SkPaint::kStroke_Style: + SkPaint miter limit, SkPaint::Cap, SkPaint::Join, and SkPaint stroke width; + apply to SkPath created from blob. + + @param blob glyphs, positions, and their paints' text size, typeface, and so on + @param x horizontal offset applied to blob + @param y vertical offset applied to blob + @param paint blend, color, stroking, and so on, used to draw + + example: https://fiddle.skia.org/c/@Canvas_drawTextBlob + */ + void drawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, const SkPaint& paint); + + /** Draws SkTextBlob blob at (x, y), using clip, SkMatrix, and SkPaint paint. + + blob contains glyphs, their positions, and paint attributes specific to text: + SkTypeface, SkPaint text size, SkPaint text scale x, + SkPaint text skew x, SkPaint::Align, SkPaint::Hinting, anti-alias, SkPaint fake bold, + SkPaint font embedded bitmaps, SkPaint full hinting spacing, LCD text, SkPaint linear text, + and SkPaint subpixel text. + + SkTextEncoding must be set to SkTextEncoding::kGlyphID. + + Elements of paint: SkPathEffect, SkMaskFilter, SkShader, SkColorFilter, + and SkImageFilter; apply to blob. + + @param blob glyphs, positions, and their paints' text size, typeface, and so on + @param x horizontal offset applied to blob + @param y vertical offset applied to blob + @param paint blend, color, stroking, and so on, used to draw + */ + void drawTextBlob(const sk_sp& blob, SkScalar x, SkScalar y, const SkPaint& paint) { + this->drawTextBlob(blob.get(), x, y, paint); + } + + /** Draws SkPicture picture, using clip and SkMatrix. + Clip and SkMatrix are unchanged by picture contents, as if + save() was called before and restore() was called after drawPicture(). + + SkPicture records a series of draw commands for later playback. + + @param picture recorded drawing commands to play + */ + void drawPicture(const SkPicture* picture) { + this->drawPicture(picture, nullptr, nullptr); + } + + /** Draws SkPicture picture, using clip and SkMatrix. + Clip and SkMatrix are unchanged by picture contents, as if + save() was called before and restore() was called after drawPicture(). + + SkPicture records a series of draw commands for later playback. + + @param picture recorded drawing commands to play + */ + void drawPicture(const sk_sp& picture) { + this->drawPicture(picture.get()); + } + + /** Draws SkPicture picture, using clip and SkMatrix; transforming picture with + SkMatrix matrix, if provided; and use SkPaint paint alpha, SkColorFilter, + SkImageFilter, and SkBlendMode, if provided. + + If paint is non-null, then the picture is always drawn into a temporary layer before + actually landing on the canvas. Note that drawing into a layer can also change its + appearance if there are any non-associative blendModes inside any of the pictures elements. + + @param picture recorded drawing commands to play + @param matrix SkMatrix to rotate, scale, translate, and so on; may be nullptr + @param paint SkPaint to apply transparency, filtering, and so on; may be nullptr + + example: https://fiddle.skia.org/c/@Canvas_drawPicture_3 + */ + void drawPicture(const SkPicture* picture, const SkMatrix* matrix, const SkPaint* paint); + + /** Draws SkPicture picture, using clip and SkMatrix; transforming picture with + SkMatrix matrix, if provided; and use SkPaint paint alpha, SkColorFilter, + SkImageFilter, and SkBlendMode, if provided. + + If paint is non-null, then the picture is always drawn into a temporary layer before + actually landing on the canvas. Note that drawing into a layer can also change its + appearance if there are any non-associative blendModes inside any of the pictures elements. + + @param picture recorded drawing commands to play + @param matrix SkMatrix to rotate, scale, translate, and so on; may be nullptr + @param paint SkPaint to apply transparency, filtering, and so on; may be nullptr + */ + void drawPicture(const sk_sp& picture, const SkMatrix* matrix, + const SkPaint* paint) { + this->drawPicture(picture.get(), matrix, paint); + } + + /** Draws SkVertices vertices, a triangle mesh, using clip and SkMatrix. + If paint contains an SkShader and vertices does not contain texCoords, the shader + is mapped using the vertices' positions. + + SkBlendMode is ignored if SkVertices does not have colors. Otherwise, it combines + - the SkShader if SkPaint contains SkShader + - or the opaque SkPaint color if SkPaint does not contain SkShader + as the src of the blend and the interpolated vertex colors as the dst. + + SkMaskFilter, SkPathEffect, and antialiasing on SkPaint are ignored. + + @param vertices triangle mesh to draw + @param mode combines vertices' colors with SkShader if present or SkPaint opaque color + if not. Ignored if the vertices do not contain color. + @param paint specifies the SkShader, used as SkVertices texture, and SkColorFilter. + + example: https://fiddle.skia.org/c/@Canvas_drawVertices + */ + void drawVertices(const SkVertices* vertices, SkBlendMode mode, const SkPaint& paint); + + /** Draws SkVertices vertices, a triangle mesh, using clip and SkMatrix. + If paint contains an SkShader and vertices does not contain texCoords, the shader + is mapped using the vertices' positions. + + SkBlendMode is ignored if SkVertices does not have colors. Otherwise, it combines + - the SkShader if SkPaint contains SkShader + - or the opaque SkPaint color if SkPaint does not contain SkShader + as the src of the blend and the interpolated vertex colors as the dst. + + SkMaskFilter, SkPathEffect, and antialiasing on SkPaint are ignored. + + @param vertices triangle mesh to draw + @param mode combines vertices' colors with SkShader if present or SkPaint opaque color + if not. Ignored if the vertices do not contain color. + @param paint specifies the SkShader, used as SkVertices texture, may be nullptr + + example: https://fiddle.skia.org/c/@Canvas_drawVertices_2 + */ + void drawVertices(const sk_sp& vertices, SkBlendMode mode, const SkPaint& paint); + +#if defined(SK_ENABLE_SKSL) + /** + Experimental, under active development, and subject to change without notice. + + Draws a mesh using a user-defined specification (see SkMeshSpecification). + + SkBlender is ignored if SkMesh's specification does not output fragment shader color. + Otherwise, it combines + - the SkShader if SkPaint contains SkShader + - or the opaque SkPaint color if SkPaint does not contain SkShader + as the src of the blend and the mesh's fragment color as the dst. + + SkMaskFilter, SkPathEffect, and antialiasing on SkPaint are ignored. + + @param mesh the mesh vertices and compatible specification. + @param blender combines vertices colors with SkShader if present or SkPaint opaque color + if not. Ignored if the custom mesh does not output color. Defaults to + SkBlendMode::kModulate if nullptr. + @param paint specifies the SkShader, used as SkVertices texture, may be nullptr + */ + void drawMesh(const SkMesh& mesh, sk_sp blender, const SkPaint& paint); +#endif + + /** Draws a Coons patch: the interpolation of four cubics with shared corners, + associating a color, and optionally a texture SkPoint, with each corner. + + SkPoint array cubics specifies four SkPath cubic starting at the top-left corner, + in clockwise order, sharing every fourth point. The last SkPath cubic ends at the + first point. + + Color array color associates colors with corners in top-left, top-right, + bottom-right, bottom-left order. + + If paint contains SkShader, SkPoint array texCoords maps SkShader as texture to + corners in top-left, top-right, bottom-right, bottom-left order. If texCoords is + nullptr, SkShader is mapped using positions (derived from cubics). + + SkBlendMode is ignored if colors is null. Otherwise, it combines + - the SkShader if SkPaint contains SkShader + - or the opaque SkPaint color if SkPaint does not contain SkShader + as the src of the blend and the interpolated patch colors as the dst. + + SkMaskFilter, SkPathEffect, and antialiasing on SkPaint are ignored. + + @param cubics SkPath cubic array, sharing common points + @param colors color array, one for each corner + @param texCoords SkPoint array of texture coordinates, mapping SkShader to corners; + may be nullptr + @param mode combines patch's colors with SkShader if present or SkPaint opaque color + if not. Ignored if colors is null. + @param paint SkShader, SkColorFilter, SkBlendMode, used to draw + */ + void drawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode mode, const SkPaint& paint); + + /** Draws a set of sprites from atlas, using clip, SkMatrix, and optional SkPaint paint. + paint uses anti-alias, alpha, SkColorFilter, SkImageFilter, and SkBlendMode + to draw, if present. For each entry in the array, SkRect tex locates sprite in + atlas, and SkRSXform xform transforms it into destination space. + + SkMaskFilter and SkPathEffect on paint are ignored. + + xform, tex, and colors if present, must contain count entries. + Optional colors are applied for each sprite using SkBlendMode mode, treating + sprite as source and colors as destination. + Optional cullRect is a conservative bounds of all transformed sprites. + If cullRect is outside of clip, canvas can skip drawing. + + If atlas is nullptr, this draws nothing. + + @param atlas SkImage containing sprites + @param xform SkRSXform mappings for sprites in atlas + @param tex SkRect locations of sprites in atlas + @param colors one per sprite, blended with sprite using SkBlendMode; may be nullptr + @param count number of sprites to draw + @param mode SkBlendMode combining colors and sprites + @param sampling SkSamplingOptions used when sampling from the atlas image + @param cullRect bounds of transformed sprites for efficient clipping; may be nullptr + @param paint SkColorFilter, SkImageFilter, SkBlendMode, and so on; may be nullptr + */ + void drawAtlas(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[], + const SkColor colors[], int count, SkBlendMode mode, + const SkSamplingOptions& sampling, const SkRect* cullRect, const SkPaint* paint); + + /** Draws SkDrawable drawable using clip and SkMatrix, concatenated with + optional matrix. + + If SkCanvas has an asynchronous implementation, as is the case + when it is recording into SkPicture, then drawable will be referenced, + so that SkDrawable::draw() can be called when the operation is finalized. To force + immediate drawing, call SkDrawable::draw() instead. + + @param drawable custom struct encapsulating drawing commands + @param matrix transformation applied to drawing; may be nullptr + + example: https://fiddle.skia.org/c/@Canvas_drawDrawable + */ + void drawDrawable(SkDrawable* drawable, const SkMatrix* matrix = nullptr); + + /** Draws SkDrawable drawable using clip and SkMatrix, offset by (x, y). + + If SkCanvas has an asynchronous implementation, as is the case + when it is recording into SkPicture, then drawable will be referenced, + so that SkDrawable::draw() can be called when the operation is finalized. To force + immediate drawing, call SkDrawable::draw() instead. + + @param drawable custom struct encapsulating drawing commands + @param x offset into SkCanvas writable pixels on x-axis + @param y offset into SkCanvas writable pixels on y-axis + + example: https://fiddle.skia.org/c/@Canvas_drawDrawable_2 + */ + void drawDrawable(SkDrawable* drawable, SkScalar x, SkScalar y); + + /** Associates SkRect on SkCanvas with an annotation; a key-value pair, where the key is + a null-terminated UTF-8 string, and optional value is stored as SkData. + + Only some canvas implementations, such as recording to SkPicture, or drawing to + document PDF, use annotations. + + @param rect SkRect extent of canvas to annotate + @param key string used for lookup + @param value data holding value stored in annotation + + example: https://fiddle.skia.org/c/@Canvas_drawAnnotation_2 + */ + void drawAnnotation(const SkRect& rect, const char key[], SkData* value); + + /** Associates SkRect on SkCanvas when an annotation; a key-value pair, where the key is + a null-terminated UTF-8 string, and optional value is stored as SkData. + + Only some canvas implementations, such as recording to SkPicture, or drawing to + document PDF, use annotations. + + @param rect SkRect extent of canvas to annotate + @param key string used for lookup + @param value data holding value stored in annotation + */ + void drawAnnotation(const SkRect& rect, const char key[], const sk_sp& value) { + this->drawAnnotation(rect, key, value.get()); + } + + /** Returns true if clip is empty; that is, nothing will draw. + + May do work when called; it should not be called + more often than needed. However, once called, subsequent calls perform no + work until clip changes. + + @return true if clip is empty + + example: https://fiddle.skia.org/c/@Canvas_isClipEmpty + */ + virtual bool isClipEmpty() const; + + /** Returns true if clip is SkRect and not empty. + Returns false if the clip is empty, or if it is not SkRect. + + @return true if clip is SkRect and not empty + + example: https://fiddle.skia.org/c/@Canvas_isClipRect + */ + virtual bool isClipRect() const; + + /** Returns the current transform from local coordinates to the 'device', which for most + * purposes means pixels. + * + * @return transformation from local coordinates to device / pixels. + */ + SkM44 getLocalToDevice() const; + + /** + * Throws away the 3rd row and column in the matrix, so be warned. + */ + SkMatrix getLocalToDeviceAs3x3() const { + return this->getLocalToDevice().asM33(); + } + +#ifdef SK_SUPPORT_LEGACY_GETTOTALMATRIX + /** DEPRECATED + * Legacy version of getLocalToDevice(), which strips away any Z information, and + * just returns a 3x3 version. + * + * @return 3x3 version of getLocalToDevice() + * + * example: https://fiddle.skia.org/c/@Canvas_getTotalMatrix + * example: https://fiddle.skia.org/c/@Clip + */ + SkMatrix getTotalMatrix() const; +#endif + + /////////////////////////////////////////////////////////////////////////// + +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) && defined(SK_GANESH) + // These methods exist to support WebView in Android Framework. + SkIRect topLayerBounds() const; + GrBackendRenderTarget topLayerBackendRenderTarget() const; +#endif + + /** + * Returns the global clip as a region. If the clip contains AA, then only the bounds + * of the clip may be returned. + */ + void temporary_internal_getRgnClip(SkRegion* region); + + void private_draw_shadow_rec(const SkPath&, const SkDrawShadowRec&); + + +protected: + // default impl defers to getDevice()->newSurface(info) + virtual sk_sp onNewSurface(const SkImageInfo& info, const SkSurfaceProps& props); + + // default impl defers to its device + virtual bool onPeekPixels(SkPixmap* pixmap); + virtual bool onAccessTopLayerPixels(SkPixmap* pixmap); + virtual SkImageInfo onImageInfo() const; + virtual bool onGetProps(SkSurfaceProps* props, bool top) const; + virtual void onFlush(); + + // Subclass save/restore notifiers. + // Overriders should call the corresponding INHERITED method up the inheritance chain. + // getSaveLayerStrategy()'s return value may suppress full layer allocation. + enum SaveLayerStrategy { + kFullLayer_SaveLayerStrategy, + kNoLayer_SaveLayerStrategy, + }; + + virtual void willSave() {} + // Overriders should call the corresponding INHERITED method up the inheritance chain. + virtual SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& ) { + return kFullLayer_SaveLayerStrategy; + } + + // returns true if we should actually perform the saveBehind, or false if we should just save. + virtual bool onDoSaveBehind(const SkRect*) { return true; } + virtual void willRestore() {} + virtual void didRestore() {} + + virtual void didConcat44(const SkM44&) {} + virtual void didSetM44(const SkM44&) {} + virtual void didTranslate(SkScalar, SkScalar) {} + virtual void didScale(SkScalar, SkScalar) {} + + // NOTE: If you are adding a new onDraw virtual to SkCanvas, PLEASE add an override to + // SkCanvasVirtualEnforcer (in SkCanvasVirtualEnforcer.h). This ensures that subclasses using + // that mechanism will be required to implement the new function. + virtual void onDrawPaint(const SkPaint& paint); + virtual void onDrawBehind(const SkPaint& paint); + virtual void onDrawRect(const SkRect& rect, const SkPaint& paint); + virtual void onDrawRRect(const SkRRect& rrect, const SkPaint& paint); + virtual void onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint); + virtual void onDrawOval(const SkRect& rect, const SkPaint& paint); + virtual void onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle, + bool useCenter, const SkPaint& paint); + virtual void onDrawPath(const SkPath& path, const SkPaint& paint); + virtual void onDrawRegion(const SkRegion& region, const SkPaint& paint); + + virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint); + + virtual void onDrawGlyphRunList(const sktext::GlyphRunList& glyphRunList, const SkPaint& paint); + + virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode mode, const SkPaint& paint); + virtual void onDrawPoints(PointMode mode, size_t count, const SkPoint pts[], + const SkPaint& paint); + + virtual void onDrawImage2(const SkImage*, SkScalar dx, SkScalar dy, const SkSamplingOptions&, + const SkPaint*); + virtual void onDrawImageRect2(const SkImage*, const SkRect& src, const SkRect& dst, + const SkSamplingOptions&, const SkPaint*, SrcRectConstraint); + virtual void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect& dst, + SkFilterMode, const SkPaint*); + virtual void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect src[], + const SkColor[], int count, SkBlendMode, const SkSamplingOptions&, + const SkRect* cull, const SkPaint*); + virtual void onDrawEdgeAAImageSet2(const ImageSetEntry imageSet[], int count, + const SkPoint dstClips[], const SkMatrix preViewMatrices[], + const SkSamplingOptions&, const SkPaint*, + SrcRectConstraint); + + virtual void onDrawVerticesObject(const SkVertices* vertices, SkBlendMode mode, + const SkPaint& paint); +#ifdef SK_ENABLE_SKSL + virtual void onDrawMesh(const SkMesh&, sk_sp, const SkPaint&); +#endif + virtual void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value); + virtual void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&); + + virtual void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix); + virtual void onDrawPicture(const SkPicture* picture, const SkMatrix* matrix, + const SkPaint* paint); + + virtual void onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], QuadAAFlags aaFlags, + const SkColor4f& color, SkBlendMode mode); + + enum ClipEdgeStyle { + kHard_ClipEdgeStyle, + kSoft_ClipEdgeStyle + }; + + virtual void onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle edgeStyle); + virtual void onClipRRect(const SkRRect& rrect, SkClipOp op, ClipEdgeStyle edgeStyle); + virtual void onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle edgeStyle); + virtual void onClipShader(sk_sp, SkClipOp); + virtual void onClipRegion(const SkRegion& deviceRgn, SkClipOp op); + virtual void onResetClip(); + + virtual void onDiscard(); + +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) + /** Experimental + */ + virtual sk_sp onConvertGlyphRunListToSlug( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint); + + /** Experimental + */ + virtual void onDrawSlug(const sktext::gpu::Slug* slug); +#endif + +private: + + enum ShaderOverrideOpacity { + kNone_ShaderOverrideOpacity, //!< there is no overriding shader (bitmap or image) + kOpaque_ShaderOverrideOpacity, //!< the overriding shader is opaque + kNotOpaque_ShaderOverrideOpacity, //!< the overriding shader may not be opaque + }; + + // notify our surface (if we have one) that we are about to draw, so it + // can perform copy-on-write or invalidate any cached images + // returns false if the copy failed + bool SK_WARN_UNUSED_RESULT predrawNotify(bool willOverwritesEntireSurface = false); + bool SK_WARN_UNUSED_RESULT predrawNotify(const SkRect*, const SkPaint*, ShaderOverrideOpacity); + + enum class CheckForOverwrite : bool { + kNo = false, + kYes = true + }; + // call the appropriate predrawNotify and create a layer if needed. + std::optional aboutToDraw( + SkCanvas* canvas, + const SkPaint& paint, + const SkRect* rawBounds = nullptr, + CheckForOverwrite = CheckForOverwrite::kNo, + ShaderOverrideOpacity = kNone_ShaderOverrideOpacity); + + // The bottom-most device in the stack, only changed by init(). Image properties and the final + // canvas pixels are determined by this device. + SkBaseDevice* baseDevice() const { + SkASSERT(fBaseDevice); + return fBaseDevice.get(); + } + + // The top-most device in the stack, will change within saveLayer()'s. All drawing and clipping + // operations should route to this device. + SkBaseDevice* topDevice() const; + + // Canvases maintain a sparse stack of layers, where the top-most layer receives the drawing, + // clip, and matrix commands. There is a layer per call to saveLayer() using the + // kFullLayer_SaveLayerStrategy. + struct Layer { + sk_sp fDevice; + sk_sp fImageFilter; // applied to layer *before* being drawn by paint + SkPaint fPaint; + bool fDiscard; + + Layer(sk_sp device, sk_sp imageFilter, const SkPaint& paint); + }; + + // Encapsulate state needed to restore from saveBehind() + struct BackImage { + // Out of line to avoid including SkSpecialImage.h + BackImage(sk_sp, SkIPoint); + BackImage(const BackImage&); + BackImage(BackImage&&); + BackImage& operator=(const BackImage&); + ~BackImage(); + + sk_sp fImage; + SkIPoint fLoc; + }; + + class MCRec { + public: + // If not null, this MCRec corresponds with the saveLayer() record that made the layer. + // The base "layer" is not stored here, since it is stored inline in SkCanvas and has no + // restoration behavior. + std::unique_ptr fLayer; + + // This points to the device of the top-most layer (which may be lower in the stack), or + // to the canvas's fBaseDevice. The MCRec does not own the device. + SkBaseDevice* fDevice; + + std::unique_ptr fBackImage; + SkM44 fMatrix; + int fDeferredSaveCount = 0; + + MCRec(SkBaseDevice* device); + MCRec(const MCRec* prev); + ~MCRec(); + + void newLayer(sk_sp layerDevice, + sk_sp filter, + const SkPaint& restorePaint); + + void reset(SkBaseDevice* device); + }; + + // the first N recs that can fit here mean we won't call malloc + static constexpr int kMCRecSize = 96; // most recent measurement + static constexpr int kMCRecCount = 32; // common depth for save/restores + + intptr_t fMCRecStorage[kMCRecSize * kMCRecCount / sizeof(intptr_t)]; + + SkDeque fMCStack; + // points to top of stack + MCRec* fMCRec; + + // Installed via init() + sk_sp fBaseDevice; + const SkSurfaceProps fProps; + + int fSaveCount; // value returned by getSaveCount() + + std::unique_ptr fAllocator; + + SkSurface_Base* fSurfaceBase; + SkSurface_Base* getSurfaceBase() const { return fSurfaceBase; } + void setSurfaceBase(SkSurface_Base* sb) { + fSurfaceBase = sb; + } + friend class SkSurface_Base; + friend class SkSurface_Gpu; + + SkIRect fClipRestrictionRect = SkIRect::MakeEmpty(); + int fClipRestrictionSaveCount = -1; + + void doSave(); + void checkForDeferredSave(); + void internalSetMatrix(const SkM44&); + + friend class SkAndroidFrameworkUtils; + friend class SkCanvasPriv; // needs to expose android functions for testing outside android + friend class AutoLayerForImageFilter; + friend class SkSurface_Raster; // needs getDevice() + friend class SkNoDrawCanvas; // needs resetForNextPicture() + friend class SkNWayCanvas; + friend class SkPictureRecord; // predrawNotify (why does it need it? ) + friend class SkOverdrawCanvas; + friend class SkRasterHandleAllocator; + friend class SkRecords::Draw; + template + friend class SkTestCanvas; + +protected: + // For use by SkNoDrawCanvas (via SkCanvasVirtualEnforcer, which can't be a friend) + SkCanvas(const SkIRect& bounds); +private: + SkCanvas(const SkBitmap&, std::unique_ptr, + SkRasterHandleAllocator::Handle, const SkSurfaceProps* props); + + SkCanvas(SkCanvas&&) = delete; + SkCanvas(const SkCanvas&) = delete; + SkCanvas& operator=(SkCanvas&&) = delete; + SkCanvas& operator=(const SkCanvas&) = delete; + +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) + friend class sktext::gpu::Slug; + /** Experimental + * Convert a SkTextBlob to a sktext::gpu::Slug using the current canvas state. + */ + sk_sp convertBlobToSlug(const SkTextBlob& blob, SkPoint origin, + const SkPaint& paint); + + /** Experimental + * Draw an sktext::gpu::Slug given the current canvas state. + */ + void drawSlug(const sktext::gpu::Slug* slug); +#endif + + /** Experimental + * Saves the specified subset of the current pixels in the current layer, + * and then clears those pixels to transparent black. + * Restores the pixels on restore() by drawing them in SkBlendMode::kDstOver. + * + * @param subset conservative bounds of the area to be saved / restored. + * @return depth of save state stack before this call was made. + */ + int only_axis_aligned_saveBehind(const SkRect* subset); + + /** + * Like drawPaint, but magically clipped to the most recent saveBehind buffer rectangle. + * If there is no active saveBehind, then this draws nothing. + */ + void drawClippedToSaveBehind(const SkPaint&); + + void resetForNextPicture(const SkIRect& bounds); + + // needs gettotalclip() + friend class SkCanvasStateUtils; + + void init(sk_sp); + + // All base onDrawX() functions should call this and skip drawing if it returns true. + // If 'matrix' is non-null, it maps the paint's fast bounds before checking for quick rejection + bool internalQuickReject(const SkRect& bounds, const SkPaint& paint, + const SkMatrix* matrix = nullptr); + + void internalDrawPaint(const SkPaint& paint); + void internalSaveLayer(const SaveLayerRec&, SaveLayerStrategy); + void internalSaveBehind(const SkRect*); + + void internalConcat44(const SkM44&); + + // shared by save() and saveLayer() + void internalSave(); + void internalRestore(); + + enum class DeviceCompatibleWithFilter : bool { + // Check the src device's local-to-device matrix for compatibility with the filter, and if + // it is not compatible, introduce an intermediate image and transformation that allows the + // filter to be evaluated on the modified src content. + kUnknown = false, + // Assume that the src device's local-to-device matrix is compatible with the filter. + kYes = true + }; + /** + * Filters the contents of 'src' and draws the result into 'dst'. The filter is evaluated + * relative to the current canvas matrix, and src is drawn to dst using their relative transform + * 'paint' is applied after the filter and must not have a mask or image filter of its own. + * A null 'filter' behaves as if the identity filter were used. + * + * 'scaleFactor' is an extra uniform scale transform applied to downscale the 'src' image + * before any filtering, or as part of the copy, and is then drawn with 1/scaleFactor to 'dst'. + * Must be 1.0 if 'compat' is kYes (i.e. any scale factor has already been baked into the + * relative transforms between the devices). + */ + void internalDrawDeviceWithFilter(SkBaseDevice* src, SkBaseDevice* dst, + const SkImageFilter* filter, const SkPaint& paint, + DeviceCompatibleWithFilter compat, + SkScalar scaleFactor = 1.f); + + /* + * Returns true if drawing the specified rect (or all if it is null) with the specified + * paint (or default if null) would overwrite the entire root device of the canvas + * (i.e. the canvas' surface if it had one). + */ + bool wouldOverwriteEntireSurface(const SkRect*, const SkPaint*, ShaderOverrideOpacity) const; + + /** + * Returns true if the paint's imagefilter can be invoked directly, without needed a layer. + */ + bool canDrawBitmapAsSprite(SkScalar x, SkScalar y, int w, int h, const SkSamplingOptions&, + const SkPaint&); + + /** + * Returns true if the clip (for any active layer) contains antialiasing. + * If the clip is empty, this will return false. + */ + bool androidFramework_isClipAA() const; + + /** + * Reset the clip to be wide-open (modulo any separately specified device clip restriction). + * This operate within the save/restore clip stack so it can be undone by restoring to an + * earlier save point. + */ + void internal_private_resetClip(); + + virtual SkPaintFilterCanvas* internal_private_asPaintFilterCanvas() const { return nullptr; } + + // Keep track of the device clip bounds in the canvas' global space to reject draws before + // invoking the top-level device. + SkRect fQuickRejectBounds; + + // Compute the clip's bounds based on all clipped SkDevice's reported device bounds transformed + // into the canvas' global space. + SkRect computeDeviceClipBounds(bool outsetForAA=true) const; + + class AutoUpdateQRBounds; + void validateClip() const; + + std::unique_ptr fScratchGlyphRunBuilder; + + using INHERITED = SkRefCnt; +}; + +/** \class SkAutoCanvasRestore + Stack helper class calls SkCanvas::restoreToCount when SkAutoCanvasRestore + goes out of scope. Use this to guarantee that the canvas is restored to a known + state. +*/ +class SkAutoCanvasRestore { +public: + + /** Preserves SkCanvas::save() count. Optionally saves SkCanvas clip and SkCanvas matrix. + + @param canvas SkCanvas to guard + @param doSave call SkCanvas::save() + @return utility to restore SkCanvas state on destructor + */ + SkAutoCanvasRestore(SkCanvas* canvas, bool doSave) : fCanvas(canvas), fSaveCount(0) { + if (fCanvas) { + fSaveCount = canvas->getSaveCount(); + if (doSave) { + canvas->save(); + } + } + } + + /** Restores SkCanvas to saved state. Destructor is called when container goes out of + scope. + */ + ~SkAutoCanvasRestore() { + if (fCanvas) { + fCanvas->restoreToCount(fSaveCount); + } + } + + /** Restores SkCanvas to saved state immediately. Subsequent calls and + ~SkAutoCanvasRestore() have no effect. + */ + void restore() { + if (fCanvas) { + fCanvas->restoreToCount(fSaveCount); + fCanvas = nullptr; + } + } + +private: + SkCanvas* fCanvas; + int fSaveCount; + + SkAutoCanvasRestore(SkAutoCanvasRestore&&) = delete; + SkAutoCanvasRestore(const SkAutoCanvasRestore&) = delete; + SkAutoCanvasRestore& operator=(SkAutoCanvasRestore&&) = delete; + SkAutoCanvasRestore& operator=(const SkAutoCanvasRestore&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkCanvasVirtualEnforcer.h b/gfx/skia/skia/include/core/SkCanvasVirtualEnforcer.h new file mode 100644 index 0000000000..5086b4337d --- /dev/null +++ b/gfx/skia/skia/include/core/SkCanvasVirtualEnforcer.h @@ -0,0 +1,61 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCanvasVirtualEnforcer_DEFINED +#define SkCanvasVirtualEnforcer_DEFINED + +#include "include/core/SkCanvas.h" + +// If you would ordinarily want to inherit from Base (eg SkCanvas, SkNWayCanvas), instead +// inherit from SkCanvasVirtualEnforcer, which will make the build fail if you forget +// to override one of SkCanvas' key virtual hooks. +template +class SkCanvasVirtualEnforcer : public Base { +public: + using Base::Base; + +protected: + void onDrawPaint(const SkPaint& paint) override = 0; + void onDrawBehind(const SkPaint&) override {} // make zero after android updates + void onDrawRect(const SkRect& rect, const SkPaint& paint) override = 0; + void onDrawRRect(const SkRRect& rrect, const SkPaint& paint) override = 0; + void onDrawDRRect(const SkRRect& outer, const SkRRect& inner, + const SkPaint& paint) override = 0; + void onDrawOval(const SkRect& rect, const SkPaint& paint) override = 0; + void onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle, bool useCenter, + const SkPaint& paint) override = 0; + void onDrawPath(const SkPath& path, const SkPaint& paint) override = 0; + void onDrawRegion(const SkRegion& region, const SkPaint& paint) override = 0; + + void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) override = 0; + + void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode mode, + const SkPaint& paint) override = 0; + void onDrawPoints(SkCanvas::PointMode mode, size_t count, const SkPoint pts[], + const SkPaint& paint) override = 0; + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + // This is under active development for Chrome and not used in Android. Hold off on adding + // implementations in Android's SkCanvas subclasses until this stabilizes. + void onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], + SkCanvas::QuadAAFlags aaFlags, const SkColor4f& color, SkBlendMode mode) override {} +#else + void onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], + SkCanvas::QuadAAFlags aaFlags, const SkColor4f& color, SkBlendMode mode) override = 0; +#endif + + void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override = 0; + void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override = 0; + + void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override = 0; + void onDrawPicture(const SkPicture* picture, const SkMatrix* matrix, + const SkPaint* paint) override = 0; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkCapabilities.h b/gfx/skia/skia/include/core/SkCapabilities.h new file mode 100644 index 0000000000..214b5138f0 --- /dev/null +++ b/gfx/skia/skia/include/core/SkCapabilities.h @@ -0,0 +1,44 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCapabilities_DEFINED +#define SkCapabilities_DEFINED + +#include "include/core/SkRefCnt.h" + +#ifdef SK_ENABLE_SKSL +#include "include/sksl/SkSLVersion.h" +namespace SkSL { struct ShaderCaps; } +#endif + +#if defined(SK_GRAPHITE) +namespace skgpu::graphite { class Caps; } +#endif + +class SK_API SkCapabilities : public SkRefCnt { +public: + static sk_sp RasterBackend(); + +#ifdef SK_ENABLE_SKSL + SkSL::Version skslVersion() const { return fSkSLVersion; } +#endif + +protected: +#if defined(SK_GRAPHITE) + friend class skgpu::graphite::Caps; // for ctor +#endif + + SkCapabilities() = default; + +#ifdef SK_ENABLE_SKSL + void initSkCaps(const SkSL::ShaderCaps*); + + SkSL::Version fSkSLVersion = SkSL::Version::k100; +#endif +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkClipOp.h b/gfx/skia/skia/include/core/SkClipOp.h new file mode 100644 index 0000000000..3da6c61131 --- /dev/null +++ b/gfx/skia/skia/include/core/SkClipOp.h @@ -0,0 +1,19 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkClipOp_DEFINED +#define SkClipOp_DEFINED + +#include "include/core/SkTypes.h" + +enum class SkClipOp { + kDifference = 0, + kIntersect = 1, + kMax_EnumValue = kIntersect +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkColor.h b/gfx/skia/skia/include/core/SkColor.h new file mode 100644 index 0000000000..3b46be030f --- /dev/null +++ b/gfx/skia/skia/include/core/SkColor.h @@ -0,0 +1,447 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColor_DEFINED +#define SkColor_DEFINED + +#include "include/core/SkAlphaType.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkCPUTypes.h" + +#include +#include + +/** \file SkColor.h + + Types, consts, functions, and macros for colors. +*/ + +/** 8-bit type for an alpha value. 255 is 100% opaque, zero is 100% transparent. +*/ +typedef uint8_t SkAlpha; + +/** 32-bit ARGB color value, unpremultiplied. Color components are always in + a known order. This is different from SkPMColor, which has its bytes in a configuration + dependent order, to match the format of kBGRA_8888_SkColorType bitmaps. SkColor + is the type used to specify colors in SkPaint and in gradients. + + Color that is premultiplied has the same component values as color + that is unpremultiplied if alpha is 255, fully opaque, although may have the + component values in a different order. +*/ +typedef uint32_t SkColor; + +/** Returns color value from 8-bit component values. Asserts if SK_DEBUG is defined + if a, r, g, or b exceed 255. Since color is unpremultiplied, a may be smaller + than the largest of r, g, and b. + + @param a amount of alpha, from fully transparent (0) to fully opaque (255) + @param r amount of red, from no red (0) to full red (255) + @param g amount of green, from no green (0) to full green (255) + @param b amount of blue, from no blue (0) to full blue (255) + @return color and alpha, unpremultiplied +*/ +static constexpr inline SkColor SkColorSetARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + return SkASSERT(a <= 255 && r <= 255 && g <= 255 && b <= 255), + (a << 24) | (r << 16) | (g << 8) | (b << 0); +} + +/** Returns color value from 8-bit component values, with alpha set + fully opaque to 255. +*/ +#define SkColorSetRGB(r, g, b) SkColorSetARGB(0xFF, r, g, b) + +/** Returns alpha byte from color value. +*/ +#define SkColorGetA(color) (((color) >> 24) & 0xFF) + +/** Returns red component of color, from zero to 255. +*/ +#define SkColorGetR(color) (((color) >> 16) & 0xFF) + +/** Returns green component of color, from zero to 255. +*/ +#define SkColorGetG(color) (((color) >> 8) & 0xFF) + +/** Returns blue component of color, from zero to 255. +*/ +#define SkColorGetB(color) (((color) >> 0) & 0xFF) + +/** Returns unpremultiplied color with red, blue, and green set from c; and alpha set + from a. Alpha component of c is ignored and is replaced by a in result. + + @param c packed RGB, eight bits per component + @param a alpha: transparent at zero, fully opaque at 255 + @return color with transparency +*/ +static constexpr inline SkColor SK_WARN_UNUSED_RESULT SkColorSetA(SkColor c, U8CPU a) { + return (c & 0x00FFFFFF) | (a << 24); +} + +/** Represents fully transparent SkAlpha value. SkAlpha ranges from zero, + fully transparent; to 255, fully opaque. +*/ +constexpr SkAlpha SK_AlphaTRANSPARENT = 0x00; + +/** Represents fully opaque SkAlpha value. SkAlpha ranges from zero, + fully transparent; to 255, fully opaque. +*/ +constexpr SkAlpha SK_AlphaOPAQUE = 0xFF; + +/** Represents fully transparent SkColor. May be used to initialize a destination + containing a mask or a non-rectangular image. +*/ +constexpr SkColor SK_ColorTRANSPARENT = SkColorSetARGB(0x00, 0x00, 0x00, 0x00); + +/** Represents fully opaque black. +*/ +constexpr SkColor SK_ColorBLACK = SkColorSetARGB(0xFF, 0x00, 0x00, 0x00); + +/** Represents fully opaque dark gray. + Note that SVG dark gray is equivalent to 0xFFA9A9A9. +*/ +constexpr SkColor SK_ColorDKGRAY = SkColorSetARGB(0xFF, 0x44, 0x44, 0x44); + +/** Represents fully opaque gray. + Note that HTML gray is equivalent to 0xFF808080. +*/ +constexpr SkColor SK_ColorGRAY = SkColorSetARGB(0xFF, 0x88, 0x88, 0x88); + +/** Represents fully opaque light gray. HTML silver is equivalent to 0xFFC0C0C0. + Note that SVG light gray is equivalent to 0xFFD3D3D3. +*/ +constexpr SkColor SK_ColorLTGRAY = SkColorSetARGB(0xFF, 0xCC, 0xCC, 0xCC); + +/** Represents fully opaque white. +*/ +constexpr SkColor SK_ColorWHITE = SkColorSetARGB(0xFF, 0xFF, 0xFF, 0xFF); + +/** Represents fully opaque red. +*/ +constexpr SkColor SK_ColorRED = SkColorSetARGB(0xFF, 0xFF, 0x00, 0x00); + +/** Represents fully opaque green. HTML lime is equivalent. + Note that HTML green is equivalent to 0xFF008000. +*/ +constexpr SkColor SK_ColorGREEN = SkColorSetARGB(0xFF, 0x00, 0xFF, 0x00); + +/** Represents fully opaque blue. +*/ +constexpr SkColor SK_ColorBLUE = SkColorSetARGB(0xFF, 0x00, 0x00, 0xFF); + +/** Represents fully opaque yellow. +*/ +constexpr SkColor SK_ColorYELLOW = SkColorSetARGB(0xFF, 0xFF, 0xFF, 0x00); + +/** Represents fully opaque cyan. HTML aqua is equivalent. +*/ +constexpr SkColor SK_ColorCYAN = SkColorSetARGB(0xFF, 0x00, 0xFF, 0xFF); + +/** Represents fully opaque magenta. HTML fuchsia is equivalent. +*/ +constexpr SkColor SK_ColorMAGENTA = SkColorSetARGB(0xFF, 0xFF, 0x00, 0xFF); + +/** Converts RGB to its HSV components. + hsv[0] contains hsv hue, a value from zero to less than 360. + hsv[1] contains hsv saturation, a value from zero to one. + hsv[2] contains hsv value, a value from zero to one. + + @param red red component value from zero to 255 + @param green green component value from zero to 255 + @param blue blue component value from zero to 255 + @param hsv three element array which holds the resulting HSV components +*/ +SK_API void SkRGBToHSV(U8CPU red, U8CPU green, U8CPU blue, SkScalar hsv[3]); + +/** Converts ARGB to its HSV components. Alpha in ARGB is ignored. + hsv[0] contains hsv hue, and is assigned a value from zero to less than 360. + hsv[1] contains hsv saturation, a value from zero to one. + hsv[2] contains hsv value, a value from zero to one. + + @param color ARGB color to convert + @param hsv three element array which holds the resulting HSV components +*/ +static inline void SkColorToHSV(SkColor color, SkScalar hsv[3]) { + SkRGBToHSV(SkColorGetR(color), SkColorGetG(color), SkColorGetB(color), hsv); +} + +/** Converts HSV components to an ARGB color. Alpha is passed through unchanged. + hsv[0] represents hsv hue, an angle from zero to less than 360. + hsv[1] represents hsv saturation, and varies from zero to one. + hsv[2] represents hsv value, and varies from zero to one. + + Out of range hsv values are pinned. + + @param alpha alpha component of the returned ARGB color + @param hsv three element array which holds the input HSV components + @return ARGB equivalent to HSV +*/ +SK_API SkColor SkHSVToColor(U8CPU alpha, const SkScalar hsv[3]); + +/** Converts HSV components to an ARGB color. Alpha is set to 255. + hsv[0] represents hsv hue, an angle from zero to less than 360. + hsv[1] represents hsv saturation, and varies from zero to one. + hsv[2] represents hsv value, and varies from zero to one. + + Out of range hsv values are pinned. + + @param hsv three element array which holds the input HSV components + @return RGB equivalent to HSV +*/ +static inline SkColor SkHSVToColor(const SkScalar hsv[3]) { + return SkHSVToColor(0xFF, hsv); +} + +/** 32-bit ARGB color value, premultiplied. The byte order for this value is + configuration dependent, matching the format of kBGRA_8888_SkColorType bitmaps. + This is different from SkColor, which is unpremultiplied, and is always in the + same byte order. +*/ +typedef uint32_t SkPMColor; + +/** Returns a SkPMColor value from unpremultiplied 8-bit component values. + + @param a amount of alpha, from fully transparent (0) to fully opaque (255) + @param r amount of red, from no red (0) to full red (255) + @param g amount of green, from no green (0) to full green (255) + @param b amount of blue, from no blue (0) to full blue (255) + @return premultiplied color +*/ +SK_API SkPMColor SkPreMultiplyARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b); + +/** Returns pmcolor closest to color c. Multiplies c RGB components by the c alpha, + and arranges the bytes to match the format of kN32_SkColorType. + + @param c unpremultiplied ARGB color + @return premultiplied color +*/ +SK_API SkPMColor SkPreMultiplyColor(SkColor c); + +/** \enum SkColorChannel + Describes different color channels one can manipulate +*/ +enum class SkColorChannel { + kR, // the red channel + kG, // the green channel + kB, // the blue channel + kA, // the alpha channel + + kLastEnum = kA, +}; + +/** Used to represent the channels available in a color type or texture format as a mask. */ +enum SkColorChannelFlag : uint32_t { + kRed_SkColorChannelFlag = 1 << static_cast(SkColorChannel::kR), + kGreen_SkColorChannelFlag = 1 << static_cast(SkColorChannel::kG), + kBlue_SkColorChannelFlag = 1 << static_cast(SkColorChannel::kB), + kAlpha_SkColorChannelFlag = 1 << static_cast(SkColorChannel::kA), + kGray_SkColorChannelFlag = 0x10, + // Convenience values + kGrayAlpha_SkColorChannelFlags = kGray_SkColorChannelFlag | kAlpha_SkColorChannelFlag, + kRG_SkColorChannelFlags = kRed_SkColorChannelFlag | kGreen_SkColorChannelFlag, + kRGB_SkColorChannelFlags = kRG_SkColorChannelFlags | kBlue_SkColorChannelFlag, + kRGBA_SkColorChannelFlags = kRGB_SkColorChannelFlags | kAlpha_SkColorChannelFlag, +}; +static_assert(0 == (kGray_SkColorChannelFlag & kRGBA_SkColorChannelFlags), "bitfield conflict"); + +/** \struct SkRGBA4f + RGBA color value, holding four floating point components. Color components are always in + a known order. kAT determines if the SkRGBA4f's R, G, and B components are premultiplied + by alpha or not. + + Skia's public API always uses unpremultiplied colors, which can be stored as + SkRGBA4f. For convenience, this type can also be referred to + as SkColor4f. +*/ +template +struct SkRGBA4f { + float fR; //!< red component + float fG; //!< green component + float fB; //!< blue component + float fA; //!< alpha component + + /** Compares SkRGBA4f with other, and returns true if all components are equal. + + @param other SkRGBA4f to compare + @return true if SkRGBA4f equals other + */ + bool operator==(const SkRGBA4f& other) const { + return fA == other.fA && fR == other.fR && fG == other.fG && fB == other.fB; + } + + /** Compares SkRGBA4f with other, and returns true if not all components are equal. + + @param other SkRGBA4f to compare + @return true if SkRGBA4f is not equal to other + */ + bool operator!=(const SkRGBA4f& other) const { + return !(*this == other); + } + + /** Returns SkRGBA4f multiplied by scale. + + @param scale value to multiply by + @return SkRGBA4f as (fR * scale, fG * scale, fB * scale, fA * scale) + */ + SkRGBA4f operator*(float scale) const { + return { fR * scale, fG * scale, fB * scale, fA * scale }; + } + + /** Returns SkRGBA4f multiplied component-wise by scale. + + @param scale SkRGBA4f to multiply by + @return SkRGBA4f as (fR * scale.fR, fG * scale.fG, fB * scale.fB, fA * scale.fA) + */ + SkRGBA4f operator*(const SkRGBA4f& scale) const { + return { fR * scale.fR, fG * scale.fG, fB * scale.fB, fA * scale.fA }; + } + + /** Returns a pointer to components of SkRGBA4f, for array access. + + @return pointer to array [fR, fG, fB, fA] + */ + const float* vec() const { return &fR; } + + /** Returns a pointer to components of SkRGBA4f, for array access. + + @return pointer to array [fR, fG, fB, fA] + */ + float* vec() { return &fR; } + + /** As a std::array */ + std::array array() const { return {fR, fG, fB, fA}; } + + /** Returns one component. Asserts if index is out of range and SK_DEBUG is defined. + + @param index one of: 0 (fR), 1 (fG), 2 (fB), 3 (fA) + @return value corresponding to index + */ + float operator[](int index) const { + SkASSERT(index >= 0 && index < 4); + return this->vec()[index]; + } + + /** Returns one component. Asserts if index is out of range and SK_DEBUG is defined. + + @param index one of: 0 (fR), 1 (fG), 2 (fB), 3 (fA) + @return value corresponding to index + */ + float& operator[](int index) { + SkASSERT(index >= 0 && index < 4); + return this->vec()[index]; + } + + /** Returns true if SkRGBA4f is an opaque color. Asserts if fA is out of range and + SK_DEBUG is defined. + + @return true if SkRGBA4f is opaque + */ + bool isOpaque() const { + SkASSERT(fA <= 1.0f && fA >= 0.0f); + return fA == 1.0f; + } + + /** Returns true if all channels are in [0, 1]. */ + bool fitsInBytes() const { + SkASSERT(fA >= 0.0f && fA <= 1.0f); + return fR >= 0.0f && fR <= 1.0f && + fG >= 0.0f && fG <= 1.0f && + fB >= 0.0f && fB <= 1.0f; + } + + /** Returns closest SkRGBA4f to SkColor. Only allowed if SkRGBA4f is unpremultiplied. + + @param color Color with Alpha, red, blue, and green components + @return SkColor as SkRGBA4f + + example: https://fiddle.skia.org/c/@RGBA4f_FromColor + */ + static SkRGBA4f FromColor(SkColor color); // impl. depends on kAT + + /** Returns closest SkColor to SkRGBA4f. Only allowed if SkRGBA4f is unpremultiplied. + + @return color as SkColor + + example: https://fiddle.skia.org/c/@RGBA4f_toSkColor + */ + SkColor toSkColor() const; // impl. depends on kAT + + /** Returns closest SkRGBA4f to SkPMColor. Only allowed if SkRGBA4f is premultiplied. + + @return SkPMColor as SkRGBA4f + */ + static SkRGBA4f FromPMColor(SkPMColor); // impl. depends on kAT + + /** Returns SkRGBA4f premultiplied by alpha. Asserts at compile time if SkRGBA4f is + already premultiplied. + + @return premultiplied color + */ + SkRGBA4f premul() const { + static_assert(kAT == kUnpremul_SkAlphaType, ""); + return { fR * fA, fG * fA, fB * fA, fA }; + } + + /** Returns SkRGBA4f unpremultiplied by alpha. Asserts at compile time if SkRGBA4f is + already unpremultiplied. + + @return unpremultiplied color + */ + SkRGBA4f unpremul() const { + static_assert(kAT == kPremul_SkAlphaType, ""); + + if (fA == 0.0f) { + return { 0, 0, 0, 0 }; + } else { + float invAlpha = 1 / fA; + return { fR * invAlpha, fG * invAlpha, fB * invAlpha, fA }; + } + } + + // This produces bytes in RGBA order (eg GrColor). Impl. is the same, regardless of kAT + uint32_t toBytes_RGBA() const; + static SkRGBA4f FromBytes_RGBA(uint32_t color); + + /** + Returns a copy of the SkRGBA4f but with alpha component set to 1.0f. + + @return opaque color + */ + SkRGBA4f makeOpaque() const { + return { fR, fG, fB, 1.0f }; + } +}; + +/** \struct SkColor4f + RGBA color value, holding four floating point components. Color components are always in + a known order, and are unpremultiplied. + + This is a specialization of SkRGBA4f. For details, @see SkRGBA4f. +*/ +using SkColor4f = SkRGBA4f; + +template <> SK_API SkColor4f SkColor4f::FromColor(SkColor); +template <> SK_API SkColor SkColor4f::toSkColor() const; +template <> SK_API uint32_t SkColor4f::toBytes_RGBA() const; +template <> SK_API SkColor4f SkColor4f::FromBytes_RGBA(uint32_t color); + +namespace SkColors { +constexpr SkColor4f kTransparent = {0, 0, 0, 0}; +constexpr SkColor4f kBlack = {0, 0, 0, 1}; +constexpr SkColor4f kDkGray = {0.25f, 0.25f, 0.25f, 1}; +constexpr SkColor4f kGray = {0.50f, 0.50f, 0.50f, 1}; +constexpr SkColor4f kLtGray = {0.75f, 0.75f, 0.75f, 1}; +constexpr SkColor4f kWhite = {1, 1, 1, 1}; +constexpr SkColor4f kRed = {1, 0, 0, 1}; +constexpr SkColor4f kGreen = {0, 1, 0, 1}; +constexpr SkColor4f kBlue = {0, 0, 1, 1}; +constexpr SkColor4f kYellow = {1, 1, 0, 1}; +constexpr SkColor4f kCyan = {0, 1, 1, 1}; +constexpr SkColor4f kMagenta = {1, 0, 1, 1}; +} // namespace SkColors +#endif diff --git a/gfx/skia/skia/include/core/SkColorFilter.h b/gfx/skia/skia/include/core/SkColorFilter.h new file mode 100644 index 0000000000..1e0f6ea6f5 --- /dev/null +++ b/gfx/skia/skia/include/core/SkColorFilter.h @@ -0,0 +1,128 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorFilter_DEFINED +#define SkColorFilter_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/core/SkFlattenable.h" + +class SkColorMatrix; +class SkColorSpace; + +/** +* ColorFilters are optional objects in the drawing pipeline. When present in +* a paint, they are called with the "src" colors, and return new colors, which +* are then passed onto the next stage (either ImageFilter or Xfermode). +* +* All subclasses are required to be reentrant-safe : it must be legal to share +* the same instance between several threads. +*/ +class SK_API SkColorFilter : public SkFlattenable { +public: + /** If the filter can be represented by a source color plus Mode, this + * returns true, and sets (if not NULL) the color and mode appropriately. + * If not, this returns false and ignores the parameters. + */ + bool asAColorMode(SkColor* color, SkBlendMode* mode) const; + + /** If the filter can be represented by a 5x4 matrix, this + * returns true, and sets the matrix appropriately. + * If not, this returns false and ignores the parameter. + */ + bool asAColorMatrix(float matrix[20]) const; + + // Returns true if the filter is guaranteed to never change the alpha of a color it filters. + bool isAlphaUnchanged() const; + + SkColor filterColor(SkColor) const; + + /** + * Converts the src color (in src colorspace), into the dst colorspace, + * then applies this filter to it, returning the filtered color in the dst colorspace. + */ + SkColor4f filterColor4f(const SkColor4f& srcColor, SkColorSpace* srcCS, + SkColorSpace* dstCS) const; + + /** Construct a colorfilter whose effect is to first apply the inner filter and then apply + * this filter, applied to the output of the inner filter. + * + * result = this(inner(...)) + */ + sk_sp makeComposed(sk_sp inner) const; + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr); + +private: + SkColorFilter() = default; + friend class SkColorFilterBase; + + using INHERITED = SkFlattenable; +}; + +class SK_API SkColorFilters { +public: + static sk_sp Compose(sk_sp outer, sk_sp inner) { + return outer ? outer->makeComposed(inner) : inner; + } + + // Blends between the constant color (src) and input color (dst) based on the SkBlendMode. + // If the color space is null, the constant color is assumed to be defined in sRGB. + static sk_sp Blend(const SkColor4f& c, sk_sp, SkBlendMode mode); + static sk_sp Blend(SkColor c, SkBlendMode mode); + + static sk_sp Matrix(const SkColorMatrix&); + static sk_sp Matrix(const float rowMajor[20]); + + // A version of Matrix which operates in HSLA space instead of RGBA. + // I.e. HSLA-to-RGBA(Matrix(RGBA-to-HSLA(input))). + static sk_sp HSLAMatrix(const SkColorMatrix&); + static sk_sp HSLAMatrix(const float rowMajor[20]); + + static sk_sp LinearToSRGBGamma(); + static sk_sp SRGBToLinearGamma(); + static sk_sp Lerp(float t, sk_sp dst, sk_sp src); + + /** + * Create a table colorfilter, copying the table into the filter, and + * applying it to all 4 components. + * a' = table[a]; + * r' = table[r]; + * g' = table[g]; + * b' = table[b]; + * Components are operated on in unpremultiplied space. If the incomming + * colors are premultiplied, they are temporarily unpremultiplied, then + * the table is applied, and then the result is remultiplied. + */ + static sk_sp Table(const uint8_t table[256]); + + /** + * Create a table colorfilter, with a different table for each + * component [A, R, G, B]. If a given table is NULL, then it is + * treated as identity, with the component left unchanged. If a table + * is not null, then its contents are copied into the filter. + */ + static sk_sp TableARGB(const uint8_t tableA[256], + const uint8_t tableR[256], + const uint8_t tableG[256], + const uint8_t tableB[256]); + + /** + * Create a colorfilter that multiplies the RGB channels by one color, and + * then adds a second color, pinning the result for each component to + * [0..255]. The alpha components of the mul and add arguments + * are ignored. + */ + static sk_sp Lighting(SkColor mul, SkColor add); + +private: + SkColorFilters() = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkColorPriv.h b/gfx/skia/skia/include/core/SkColorPriv.h new file mode 100644 index 0000000000..f89de9db72 --- /dev/null +++ b/gfx/skia/skia/include/core/SkColorPriv.h @@ -0,0 +1,167 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorPriv_DEFINED +#define SkColorPriv_DEFINED + +#include "include/core/SkColor.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" + +#include + +/** Turn 0..255 into 0..256 by adding 1 at the half-way point. Used to turn a + byte into a scale value, so that we can say scale * value >> 8 instead of + alpha * value / 255. + + In debugging, asserts that alpha is 0..255 +*/ +static inline unsigned SkAlpha255To256(U8CPU alpha) { + SkASSERT(SkToU8(alpha) == alpha); + // this one assues that blending on top of an opaque dst keeps it that way + // even though it is less accurate than a+(a>>7) for non-opaque dsts + return alpha + 1; +} + +/** Multiplify value by 0..256, and shift the result down 8 + (i.e. return (value * alpha256) >> 8) + */ +#define SkAlphaMul(value, alpha256) (((value) * (alpha256)) >> 8) + +static inline U8CPU SkUnitScalarClampToByte(SkScalar x) { + return static_cast(SkTPin(x, 0.0f, 1.0f) * 255 + 0.5); +} + +#define SK_A32_BITS 8 +#define SK_R32_BITS 8 +#define SK_G32_BITS 8 +#define SK_B32_BITS 8 + +#define SK_A32_MASK ((1 << SK_A32_BITS) - 1) +#define SK_R32_MASK ((1 << SK_R32_BITS) - 1) +#define SK_G32_MASK ((1 << SK_G32_BITS) - 1) +#define SK_B32_MASK ((1 << SK_B32_BITS) - 1) + +/* + * Skia's 32bit backend only supports 1 swizzle order at a time (compile-time). + * This is specified by SK_R32_SHIFT=0 or SK_R32_SHIFT=16. + * + * For easier compatibility with Skia's GPU backend, we further restrict these + * to either (in memory-byte-order) RGBA or BGRA. Note that this "order" does + * not directly correspond to the same shift-order, since we have to take endianess + * into account. + * + * Here we enforce this constraint. + */ + +#define SK_RGBA_R32_SHIFT 0 +#define SK_RGBA_G32_SHIFT 8 +#define SK_RGBA_B32_SHIFT 16 +#define SK_RGBA_A32_SHIFT 24 + +#define SK_BGRA_B32_SHIFT 0 +#define SK_BGRA_G32_SHIFT 8 +#define SK_BGRA_R32_SHIFT 16 +#define SK_BGRA_A32_SHIFT 24 + +#if defined(SK_PMCOLOR_IS_RGBA) || defined(SK_PMCOLOR_IS_BGRA) + #error "Configure PMCOLOR by setting SK_R32_SHIFT." +#endif + +// Deduce which SK_PMCOLOR_IS_ to define from the _SHIFT defines + +#if (SK_A32_SHIFT == SK_RGBA_A32_SHIFT && \ + SK_R32_SHIFT == SK_RGBA_R32_SHIFT && \ + SK_G32_SHIFT == SK_RGBA_G32_SHIFT && \ + SK_B32_SHIFT == SK_RGBA_B32_SHIFT) + #define SK_PMCOLOR_IS_RGBA +#elif (SK_A32_SHIFT == SK_BGRA_A32_SHIFT && \ + SK_R32_SHIFT == SK_BGRA_R32_SHIFT && \ + SK_G32_SHIFT == SK_BGRA_G32_SHIFT && \ + SK_B32_SHIFT == SK_BGRA_B32_SHIFT) + #define SK_PMCOLOR_IS_BGRA +#else + #error "need 32bit packing to be either RGBA or BGRA" +#endif + +#define SkGetPackedA32(packed) ((uint32_t)((packed) << (24 - SK_A32_SHIFT)) >> 24) +#define SkGetPackedR32(packed) ((uint32_t)((packed) << (24 - SK_R32_SHIFT)) >> 24) +#define SkGetPackedG32(packed) ((uint32_t)((packed) << (24 - SK_G32_SHIFT)) >> 24) +#define SkGetPackedB32(packed) ((uint32_t)((packed) << (24 - SK_B32_SHIFT)) >> 24) + +#define SkA32Assert(a) SkASSERT((unsigned)(a) <= SK_A32_MASK) +#define SkR32Assert(r) SkASSERT((unsigned)(r) <= SK_R32_MASK) +#define SkG32Assert(g) SkASSERT((unsigned)(g) <= SK_G32_MASK) +#define SkB32Assert(b) SkASSERT((unsigned)(b) <= SK_B32_MASK) + +/** + * Pack the components into a SkPMColor, checking (in the debug version) that + * the components are 0..255, and are already premultiplied (i.e. alpha >= color) + */ +static inline SkPMColor SkPackARGB32(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + SkA32Assert(a); + SkASSERT(r <= a); + SkASSERT(g <= a); + SkASSERT(b <= a); + + return (a << SK_A32_SHIFT) | (r << SK_R32_SHIFT) | + (g << SK_G32_SHIFT) | (b << SK_B32_SHIFT); +} + +/** + * Same as SkPackARGB32, but this version guarantees to not check that the + * values are premultiplied in the debug version. + */ +static inline SkPMColor SkPackARGB32NoCheck(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + return (a << SK_A32_SHIFT) | (r << SK_R32_SHIFT) | + (g << SK_G32_SHIFT) | (b << SK_B32_SHIFT); +} + +static inline +SkPMColor SkPremultiplyARGBInline(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + SkA32Assert(a); + SkR32Assert(r); + SkG32Assert(g); + SkB32Assert(b); + + if (a != 255) { + r = SkMulDiv255Round(r, a); + g = SkMulDiv255Round(g, a); + b = SkMulDiv255Round(b, a); + } + return SkPackARGB32(a, r, g, b); +} + +// When Android is compiled optimizing for size, SkAlphaMulQ doesn't get +// inlined; forcing inlining significantly improves performance. +static SK_ALWAYS_INLINE uint32_t SkAlphaMulQ(uint32_t c, unsigned scale) { + uint32_t mask = 0xFF00FF; + + uint32_t rb = ((c & mask) * scale) >> 8; + uint32_t ag = ((c >> 8) & mask) * scale; + return (rb & mask) | (ag & ~mask); +} + +static inline SkPMColor SkPMSrcOver(SkPMColor src, SkPMColor dst) { + uint32_t scale = SkAlpha255To256(255 - SkGetPackedA32(src)); + + uint32_t mask = 0xFF00FF; + uint32_t rb = (((dst & mask) * scale) >> 8) & mask; + uint32_t ag = (((dst >> 8) & mask) * scale) & ~mask; + + rb += (src & mask); + ag += (src & ~mask); + + // Color channels (but not alpha) can overflow, so we have to saturate to 0xFF in each lane. + return std::min(rb & 0x000001FF, 0x000000FFU) | + std::min(ag & 0x0001FF00, 0x0000FF00U) | + std::min(rb & 0x01FF0000, 0x00FF0000U) | + (ag & 0xFF000000); +} + +#endif diff --git a/gfx/skia/skia/include/core/SkColorSpace.h b/gfx/skia/skia/include/core/SkColorSpace.h new file mode 100644 index 0000000000..57c29e222a --- /dev/null +++ b/gfx/skia/skia/include/core/SkColorSpace.h @@ -0,0 +1,242 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorSpace_DEFINED +#define SkColorSpace_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkOnce.h" +#include "modules/skcms/skcms.h" + +#include +#include + +class SkData; + +/** + * Describes a color gamut with primaries and a white point. + */ +struct SK_API SkColorSpacePrimaries { + float fRX; + float fRY; + float fGX; + float fGY; + float fBX; + float fBY; + float fWX; + float fWY; + + /** + * Convert primaries and a white point to a toXYZD50 matrix, the preferred color gamut + * representation of SkColorSpace. + */ + bool toXYZD50(skcms_Matrix3x3* toXYZD50) const; +}; + +namespace SkNamedTransferFn { + +// Like SkNamedGamut::kSRGB, keeping this bitwise exactly the same as skcms makes things fastest. +static constexpr skcms_TransferFunction kSRGB = + { 2.4f, (float)(1/1.055), (float)(0.055/1.055), (float)(1/12.92), 0.04045f, 0.0f, 0.0f }; + +static constexpr skcms_TransferFunction k2Dot2 = + { 2.2f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f }; + +static constexpr skcms_TransferFunction kLinear = + { 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f }; + +static constexpr skcms_TransferFunction kRec2020 = + {2.22222f, 0.909672f, 0.0903276f, 0.222222f, 0.0812429f, 0, 0}; + +static constexpr skcms_TransferFunction kPQ = + {-2.0f, -107/128.0f, 1.0f, 32/2523.0f, 2413/128.0f, -2392/128.0f, 8192/1305.0f }; + +static constexpr skcms_TransferFunction kHLG = + {-3.0f, 2.0f, 2.0f, 1/0.17883277f, 0.28466892f, 0.55991073f, 0.0f }; + +} // namespace SkNamedTransferFn + +namespace SkNamedGamut { + +static constexpr skcms_Matrix3x3 kSRGB = {{ + // ICC fixed-point (16.16) representation, taken from skcms. Please keep them exactly in sync. + // 0.436065674f, 0.385147095f, 0.143066406f, + // 0.222488403f, 0.716873169f, 0.060607910f, + // 0.013916016f, 0.097076416f, 0.714096069f, + { SkFixedToFloat(0x6FA2), SkFixedToFloat(0x6299), SkFixedToFloat(0x24A0) }, + { SkFixedToFloat(0x38F5), SkFixedToFloat(0xB785), SkFixedToFloat(0x0F84) }, + { SkFixedToFloat(0x0390), SkFixedToFloat(0x18DA), SkFixedToFloat(0xB6CF) }, +}}; + +static constexpr skcms_Matrix3x3 kAdobeRGB = {{ + // ICC fixed-point (16.16) repesentation of: + // 0.60974, 0.20528, 0.14919, + // 0.31111, 0.62567, 0.06322, + // 0.01947, 0.06087, 0.74457, + { SkFixedToFloat(0x9c18), SkFixedToFloat(0x348d), SkFixedToFloat(0x2631) }, + { SkFixedToFloat(0x4fa5), SkFixedToFloat(0xa02c), SkFixedToFloat(0x102f) }, + { SkFixedToFloat(0x04fc), SkFixedToFloat(0x0f95), SkFixedToFloat(0xbe9c) }, +}}; + +static constexpr skcms_Matrix3x3 kDisplayP3 = {{ + { 0.515102f, 0.291965f, 0.157153f }, + { 0.241182f, 0.692236f, 0.0665819f }, + { -0.00104941f, 0.0418818f, 0.784378f }, +}}; + +static constexpr skcms_Matrix3x3 kRec2020 = {{ + { 0.673459f, 0.165661f, 0.125100f }, + { 0.279033f, 0.675338f, 0.0456288f }, + { -0.00193139f, 0.0299794f, 0.797162f }, +}}; + +static constexpr skcms_Matrix3x3 kXYZ = {{ + { 1.0f, 0.0f, 0.0f }, + { 0.0f, 1.0f, 0.0f }, + { 0.0f, 0.0f, 1.0f }, +}}; + +} // namespace SkNamedGamut + +class SK_API SkColorSpace : public SkNVRefCnt { +public: + /** + * Create the sRGB color space. + */ + static sk_sp MakeSRGB(); + + /** + * Colorspace with the sRGB primaries, but a linear (1.0) gamma. + */ + static sk_sp MakeSRGBLinear(); + + /** + * Create an SkColorSpace from a transfer function and a row-major 3x3 transformation to XYZ. + */ + static sk_sp MakeRGB(const skcms_TransferFunction& transferFn, + const skcms_Matrix3x3& toXYZ); + + /** + * Create an SkColorSpace from a parsed (skcms) ICC profile. + */ + static sk_sp Make(const skcms_ICCProfile&); + + /** + * Convert this color space to an skcms ICC profile struct. + */ + void toProfile(skcms_ICCProfile*) const; + + /** + * Returns true if the color space gamma is near enough to be approximated as sRGB. + */ + bool gammaCloseToSRGB() const; + + /** + * Returns true if the color space gamma is linear. + */ + bool gammaIsLinear() const; + + /** + * Sets |fn| to the transfer function from this color space. Returns true if the transfer + * function can be represented as coefficients to the standard ICC 7-parameter equation. + * Returns false otherwise (eg, PQ, HLG). + */ + bool isNumericalTransferFn(skcms_TransferFunction* fn) const; + + /** + * Returns true and sets |toXYZD50|. + */ + bool toXYZD50(skcms_Matrix3x3* toXYZD50) const; + + /** + * Returns a hash of the gamut transformation to XYZ D50. Allows for fast equality checking + * of gamuts, at the (very small) risk of collision. + */ + uint32_t toXYZD50Hash() const { return fToXYZD50Hash; } + + /** + * Returns a color space with the same gamut as this one, but with a linear gamma. + */ + sk_sp makeLinearGamma() const; + + /** + * Returns a color space with the same gamut as this one, but with the sRGB transfer + * function. + */ + sk_sp makeSRGBGamma() const; + + /** + * Returns a color space with the same transfer function as this one, but with the primary + * colors rotated. In other words, this produces a new color space that maps RGB to GBR + * (when applied to a source), and maps RGB to BRG (when applied to a destination). + * + * This is used for testing, to construct color spaces that have severe and testable behavior. + */ + sk_sp makeColorSpin() const; + + /** + * Returns true if the color space is sRGB. + * Returns false otherwise. + * + * This allows a little bit of tolerance, given that we might see small numerical error + * in some cases: converting ICC fixed point to float, converting white point to D50, + * rounding decisions on transfer function and matrix. + * + * This does not consider a 2.2f exponential transfer function to be sRGB. While these + * functions are similar (and it is sometimes useful to consider them together), this + * function checks for logical equality. + */ + bool isSRGB() const; + + /** + * Returns a serialized representation of this color space. + */ + sk_sp serialize() const; + + /** + * If |memory| is nullptr, returns the size required to serialize. + * Otherwise, serializes into |memory| and returns the size. + */ + size_t writeToMemory(void* memory) const; + + static sk_sp Deserialize(const void* data, size_t length); + + /** + * If both are null, we return true. If one is null and the other is not, we return false. + * If both are non-null, we do a deeper compare. + */ + static bool Equals(const SkColorSpace*, const SkColorSpace*); + + void transferFn(float gabcdef[7]) const; // DEPRECATED: Remove when webview usage is gone + void transferFn(skcms_TransferFunction* fn) const; + void invTransferFn(skcms_TransferFunction* fn) const; + void gamutTransformTo(const SkColorSpace* dst, skcms_Matrix3x3* src_to_dst) const; + + uint32_t transferFnHash() const { return fTransferFnHash; } + uint64_t hash() const { return (uint64_t)fTransferFnHash << 32 | fToXYZD50Hash; } + +private: + friend class SkColorSpaceSingletonFactory; + + SkColorSpace(const skcms_TransferFunction& transferFn, const skcms_Matrix3x3& toXYZ); + + void computeLazyDstFields() const; + + uint32_t fTransferFnHash; + uint32_t fToXYZD50Hash; + + skcms_TransferFunction fTransferFn; + skcms_Matrix3x3 fToXYZD50; + + mutable skcms_TransferFunction fInvTransferFn; + mutable skcms_Matrix3x3 fFromXYZD50; + mutable SkOnce fLazyDstFieldsOnce; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkColorType.h b/gfx/skia/skia/include/core/SkColorType.h new file mode 100644 index 0000000000..789c4ad019 --- /dev/null +++ b/gfx/skia/skia/include/core/SkColorType.h @@ -0,0 +1,67 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorType_DEFINED +#define SkColorType_DEFINED + +#include "include/core/SkTypes.h" + +/** \enum SkColorType + Describes how pixel bits encode color. A pixel may be an alpha mask, a grayscale, RGB, or ARGB. + + kN32_SkColorType selects the native 32-bit ARGB format for the current configuration. This can + lead to inconsistent results across platforms, so use with caution. +*/ +enum SkColorType : int { + kUnknown_SkColorType, //!< uninitialized + kAlpha_8_SkColorType, //!< pixel with alpha in 8-bit byte + kRGB_565_SkColorType, //!< pixel with 5 bits red, 6 bits green, 5 bits blue, in 16-bit word + kARGB_4444_SkColorType, //!< pixel with 4 bits for alpha, red, green, blue; in 16-bit word + kRGBA_8888_SkColorType, //!< pixel with 8 bits for red, green, blue, alpha; in 32-bit word + kRGB_888x_SkColorType, //!< pixel with 8 bits each for red, green, blue; in 32-bit word + kBGRA_8888_SkColorType, //!< pixel with 8 bits for blue, green, red, alpha; in 32-bit word + kRGBA_1010102_SkColorType, //!< 10 bits for red, green, blue; 2 bits for alpha; in 32-bit word + kBGRA_1010102_SkColorType, //!< 10 bits for blue, green, red; 2 bits for alpha; in 32-bit word + kRGB_101010x_SkColorType, //!< pixel with 10 bits each for red, green, blue; in 32-bit word + kBGR_101010x_SkColorType, //!< pixel with 10 bits each for blue, green, red; in 32-bit word + kBGR_101010x_XR_SkColorType, //!< pixel with 10 bits each for blue, green, red; in 32-bit word, extended range + kGray_8_SkColorType, //!< pixel with grayscale level in 8-bit byte + kRGBA_F16Norm_SkColorType, //!< pixel with half floats in [0,1] for red, green, blue, alpha; + // in 64-bit word + kRGBA_F16_SkColorType, //!< pixel with half floats for red, green, blue, alpha; + // in 64-bit word + kRGBA_F32_SkColorType, //!< pixel using C float for red, green, blue, alpha; in 128-bit word + + // The following 6 colortypes are just for reading from - not for rendering to + kR8G8_unorm_SkColorType, //!< pixel with a uint8_t for red and green + + kA16_float_SkColorType, //!< pixel with a half float for alpha + kR16G16_float_SkColorType, //!< pixel with a half float for red and green + + kA16_unorm_SkColorType, //!< pixel with a little endian uint16_t for alpha + kR16G16_unorm_SkColorType, //!< pixel with a little endian uint16_t for red and green + kR16G16B16A16_unorm_SkColorType, //!< pixel with a little endian uint16_t for red, green, blue + // and alpha + + kSRGBA_8888_SkColorType, + kR8_unorm_SkColorType, + + kLastEnum_SkColorType = kR8_unorm_SkColorType, //!< last valid value + +#if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) + kN32_SkColorType = kBGRA_8888_SkColorType,//!< native 32-bit BGRA encoding + +#elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) + kN32_SkColorType = kRGBA_8888_SkColorType,//!< native 32-bit RGBA encoding + +#else + kN32_SkColorType = kBGRA_8888_SkColorType, +#endif +}; +static constexpr int kSkColorTypeCnt = static_cast(kLastEnum_SkColorType) + 1; + +#endif diff --git a/gfx/skia/skia/include/core/SkContourMeasure.h b/gfx/skia/skia/include/core/SkContourMeasure.h new file mode 100644 index 0000000000..7090deaaed --- /dev/null +++ b/gfx/skia/skia/include/core/SkContourMeasure.h @@ -0,0 +1,131 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkContourMeasure_DEFINED +#define SkContourMeasure_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkTDArray.h" + +struct SkConic; + +class SK_API SkContourMeasure : public SkRefCnt { +public: + /** Return the length of the contour. + */ + SkScalar length() const { return fLength; } + + /** Pins distance to 0 <= distance <= length(), and then computes the corresponding + * position and tangent. + */ + bool SK_WARN_UNUSED_RESULT getPosTan(SkScalar distance, SkPoint* position, + SkVector* tangent) const; + + enum MatrixFlags { + kGetPosition_MatrixFlag = 0x01, + kGetTangent_MatrixFlag = 0x02, + kGetPosAndTan_MatrixFlag = kGetPosition_MatrixFlag | kGetTangent_MatrixFlag + }; + + /** Pins distance to 0 <= distance <= getLength(), and then computes + the corresponding matrix (by calling getPosTan). + Returns false if there is no path, or a zero-length path was specified, in which case + matrix is unchanged. + */ + bool SK_WARN_UNUSED_RESULT getMatrix(SkScalar distance, SkMatrix* matrix, + MatrixFlags flags = kGetPosAndTan_MatrixFlag) const; + + /** Given a start and stop distance, return in dst the intervening segment(s). + If the segment is zero-length, return false, else return true. + startD and stopD are pinned to legal values (0..getLength()). If startD > stopD + then return false (and leave dst untouched). + Begin the segment with a moveTo if startWithMoveTo is true + */ + bool SK_WARN_UNUSED_RESULT getSegment(SkScalar startD, SkScalar stopD, SkPath* dst, + bool startWithMoveTo) const; + + /** Return true if the contour is closed() + */ + bool isClosed() const { return fIsClosed; } + +private: + struct Segment { + SkScalar fDistance; // total distance up to this point + unsigned fPtIndex; // index into the fPts array + unsigned fTValue : 30; + unsigned fType : 2; // actually the enum SkSegType + // See SkPathMeasurePriv.h + + SkScalar getScalarT() const; + + static const Segment* Next(const Segment* seg) { + unsigned ptIndex = seg->fPtIndex; + do { + ++seg; + } while (seg->fPtIndex == ptIndex); + return seg; + } + + }; + + const SkTDArray fSegments; + const SkTDArray fPts; // Points used to define the segments + + const SkScalar fLength; + const bool fIsClosed; + + SkContourMeasure(SkTDArray&& segs, SkTDArray&& pts, + SkScalar length, bool isClosed); + ~SkContourMeasure() override {} + + const Segment* distanceToSegment(SkScalar distance, SkScalar* t) const; + + friend class SkContourMeasureIter; +}; + +class SK_API SkContourMeasureIter { +public: + SkContourMeasureIter(); + /** + * Initialize the Iter with a path. + * The parts of the path that are needed are copied, so the client is free to modify/delete + * the path after this call. + * + * resScale controls the precision of the measure. values > 1 increase the + * precision (and possibly slow down the computation). + */ + SkContourMeasureIter(const SkPath& path, bool forceClosed, SkScalar resScale = 1); + ~SkContourMeasureIter(); + + /** + * Reset the Iter with a path. + * The parts of the path that are needed are copied, so the client is free to modify/delete + * the path after this call. + */ + void reset(const SkPath& path, bool forceClosed, SkScalar resScale = 1); + + /** + * Iterates through contours in path, returning a contour-measure object for each contour + * in the path. Returns null when it is done. + * + * This only returns non-zero length contours, where a contour is the segments between + * a kMove_Verb and either ... + * - the next kMove_Verb + * - kClose_Verb (1 or more) + * - kDone_Verb + * If it encounters a zero-length contour, it is skipped. + */ + sk_sp next(); + +private: + class Impl; + + std::unique_ptr fImpl; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkCoverageMode.h b/gfx/skia/skia/include/core/SkCoverageMode.h new file mode 100644 index 0000000000..aaae60c419 --- /dev/null +++ b/gfx/skia/skia/include/core/SkCoverageMode.h @@ -0,0 +1,28 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCoverageMode_DEFINED +#define SkCoverageMode_DEFINED + +/** + * Describes geometric operations (ala SkRegion::Op) that can be applied to coverage bytes. + * These can be thought of as variants of porter-duff (SkBlendMode) modes, but only applied + * to the alpha channel. + * + * See SkMaskFilter for ways to use these when combining two different masks. + */ +enum class SkCoverageMode { + kUnion, // A ∪ B A+B-A*B + kIntersect, // A ∩ B A*B + kDifference, // A - B A*(1-B) + kReverseDifference, // B - A B*(1-A) + kXor, // A ⊕ B A+B-2*A*B + + kLast = kXor, +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkCubicMap.h b/gfx/skia/skia/include/core/SkCubicMap.h new file mode 100644 index 0000000000..863c9333f6 --- /dev/null +++ b/gfx/skia/skia/include/core/SkCubicMap.h @@ -0,0 +1,47 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCubicMap_DEFINED +#define SkCubicMap_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +/** + * Fast evaluation of a cubic ease-in / ease-out curve. This is defined as a parametric cubic + * curve inside the unit square. + * + * pt[0] is implicitly { 0, 0 } + * pt[3] is implicitly { 1, 1 } + * pts[1,2].X are inside the unit [0..1] + */ +class SK_API SkCubicMap { +public: + SkCubicMap(SkPoint p1, SkPoint p2); + + static bool IsLinear(SkPoint p1, SkPoint p2) { + return SkScalarNearlyEqual(p1.fX, p1.fY) && SkScalarNearlyEqual(p2.fX, p2.fY); + } + + float computeYFromX(float x) const; + + SkPoint computeFromT(float t) const; + +private: + enum Type { + kLine_Type, // x == y + kCubeRoot_Type, // At^3 == x + kSolver_Type, // general monotonic cubic solver + }; + + SkPoint fCoeff[3]; + Type fType; +}; + +#endif + diff --git a/gfx/skia/skia/include/core/SkData.h b/gfx/skia/skia/include/core/SkData.h new file mode 100644 index 0000000000..2b50cebc81 --- /dev/null +++ b/gfx/skia/skia/include/core/SkData.h @@ -0,0 +1,191 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkData_DEFINED +#define SkData_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkAssert.h" + +#include +#include + +class SkStream; + +/** + * SkData holds an immutable data buffer. Not only is the data immutable, + * but the actual ptr that is returned (by data() or bytes()) is guaranteed + * to always be the same for the life of this instance. + */ +class SK_API SkData final : public SkNVRefCnt { +public: + /** + * Returns the number of bytes stored. + */ + size_t size() const { return fSize; } + + bool isEmpty() const { return 0 == fSize; } + + /** + * Returns the ptr to the data. + */ + const void* data() const { return fPtr; } + + /** + * Like data(), returns a read-only ptr into the data, but in this case + * it is cast to uint8_t*, to make it easy to add an offset to it. + */ + const uint8_t* bytes() const { + return reinterpret_cast(fPtr); + } + + /** + * USE WITH CAUTION. + * This call will assert that the refcnt is 1, as a precaution against modifying the + * contents when another client/thread has access to the data. + */ + void* writable_data() { + if (fSize) { + // only assert we're unique if we're not empty + SkASSERT(this->unique()); + } + return const_cast(fPtr); + } + + /** + * Helper to copy a range of the data into a caller-provided buffer. + * Returns the actual number of bytes copied, after clamping offset and + * length to the size of the data. If buffer is NULL, it is ignored, and + * only the computed number of bytes is returned. + */ + size_t copyRange(size_t offset, size_t length, void* buffer) const; + + /** + * Returns true if these two objects have the same length and contents, + * effectively returning 0 == memcmp(...) + */ + bool equals(const SkData* other) const; + + /** + * Function that, if provided, will be called when the SkData goes out + * of scope, allowing for custom allocation/freeing of the data's contents. + */ + typedef void (*ReleaseProc)(const void* ptr, void* context); + + /** + * Create a new dataref by copying the specified data + */ + static sk_sp MakeWithCopy(const void* data, size_t length); + + + /** + * Create a new data with uninitialized contents. The caller should call writable_data() + * to write into the buffer, but this must be done before another ref() is made. + */ + static sk_sp MakeUninitialized(size_t length); + + /** + * Create a new data with zero-initialized contents. The caller should call writable_data() + * to write into the buffer, but this must be done before another ref() is made. + */ + static sk_sp MakeZeroInitialized(size_t length); + + /** + * Create a new dataref by copying the specified c-string + * (a null-terminated array of bytes). The returned SkData will have size() + * equal to strlen(cstr) + 1. If cstr is NULL, it will be treated the same + * as "". + */ + static sk_sp MakeWithCString(const char cstr[]); + + /** + * Create a new dataref, taking the ptr as is, and using the + * releaseproc to free it. The proc may be NULL. + */ + static sk_sp MakeWithProc(const void* ptr, size_t length, ReleaseProc proc, void* ctx); + + /** + * Call this when the data parameter is already const and will outlive the lifetime of the + * SkData. Suitable for with const globals. + */ + static sk_sp MakeWithoutCopy(const void* data, size_t length) { + return MakeWithProc(data, length, NoopReleaseProc, nullptr); + } + + /** + * Create a new dataref from a pointer allocated by malloc. The Data object + * takes ownership of that allocation, and will handling calling sk_free. + */ + static sk_sp MakeFromMalloc(const void* data, size_t length); + + /** + * Create a new dataref the file with the specified path. + * If the file cannot be opened, this returns NULL. + */ + static sk_sp MakeFromFileName(const char path[]); + + /** + * Create a new dataref from a stdio FILE. + * This does not take ownership of the FILE, nor close it. + * The caller is free to close the FILE at its convenience. + * The FILE must be open for reading only. + * Returns NULL on failure. + */ + static sk_sp MakeFromFILE(FILE* f); + + /** + * Create a new dataref from a file descriptor. + * This does not take ownership of the file descriptor, nor close it. + * The caller is free to close the file descriptor at its convenience. + * The file descriptor must be open for reading only. + * Returns NULL on failure. + */ + static sk_sp MakeFromFD(int fd); + + /** + * Attempt to read size bytes into a SkData. If the read succeeds, return the data, + * else return NULL. Either way the stream's cursor may have been changed as a result + * of calling read(). + */ + static sk_sp MakeFromStream(SkStream*, size_t size); + + /** + * Create a new dataref using a subset of the data in the specified + * src dataref. + */ + static sk_sp MakeSubset(const SkData* src, size_t offset, size_t length); + + /** + * Returns a new empty dataref (or a reference to a shared empty dataref). + * New or shared, the caller must see that unref() is eventually called. + */ + static sk_sp MakeEmpty(); + +private: + friend class SkNVRefCnt; + ReleaseProc fReleaseProc; + void* fReleaseProcContext; + const void* fPtr; + size_t fSize; + + SkData(const void* ptr, size_t size, ReleaseProc, void* context); + explicit SkData(size_t size); // inplace new/delete + ~SkData(); + + // Ensure the unsized delete is called. + void operator delete(void* p); + + // shared internal factory + static sk_sp PrivateNewWithCopy(const void* srcOrNull, size_t length); + + static void NoopReleaseProc(const void*, void*); // {} + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkDataTable.h b/gfx/skia/skia/include/core/SkDataTable.h new file mode 100644 index 0000000000..3aa48d5f33 --- /dev/null +++ b/gfx/skia/skia/include/core/SkDataTable.h @@ -0,0 +1,122 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDataTable_DEFINED +#define SkDataTable_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkAssert.h" + +#include +#include + +/** + * Like SkData, SkDataTable holds an immutable data buffer. The data buffer is + * organized into a table of entries, each with a length, so the entries are + * not required to all be the same size. + */ +class SK_API SkDataTable : public SkRefCnt { +public: + /** + * Returns true if the table is empty (i.e. has no entries). + */ + bool isEmpty() const { return 0 == fCount; } + + /** + * Return the number of entries in the table. 0 for an empty table + */ + int count() const { return fCount; } + + /** + * Return the size of the index'th entry in the table. The caller must + * ensure that index is valid for this table. + */ + size_t atSize(int index) const; + + /** + * Return a pointer to the data of the index'th entry in the table. + * The caller must ensure that index is valid for this table. + * + * @param size If non-null, this returns the byte size of this entry. This + * will be the same value that atSize(index) would return. + */ + const void* at(int index, size_t* size = nullptr) const; + + template + const T* atT(int index, size_t* size = nullptr) const { + return reinterpret_cast(this->at(index, size)); + } + + /** + * Returns the index'th entry as a c-string, and assumes that the trailing + * null byte had been copied into the table as well. + */ + const char* atStr(int index) const { + size_t size; + const char* str = this->atT(index, &size); + SkASSERT(strlen(str) + 1 == size); + return str; + } + + typedef void (*FreeProc)(void* context); + + static sk_sp MakeEmpty(); + + /** + * Return a new DataTable that contains a copy of the data stored in each + * "array". + * + * @param ptrs array of points to each element to be copied into the table. + * @param sizes array of byte-lengths for each entry in the corresponding + * ptrs[] array. + * @param count the number of array elements in ptrs[] and sizes[] to copy. + */ + static sk_sp MakeCopyArrays(const void * const * ptrs, + const size_t sizes[], int count); + + /** + * Return a new table that contains a copy of the data in array. + * + * @param array contiguous array of data for all elements to be copied. + * @param elemSize byte-length for a given element. + * @param count the number of entries to be copied out of array. The number + * of bytes that will be copied is count * elemSize. + */ + static sk_sp MakeCopyArray(const void* array, size_t elemSize, int count); + + static sk_sp MakeArrayProc(const void* array, size_t elemSize, int count, + FreeProc proc, void* context); + +private: + struct Dir { + const void* fPtr; + uintptr_t fSize; + }; + + int fCount; + size_t fElemSize; + union { + const Dir* fDir; + const char* fElems; + } fU; + + FreeProc fFreeProc; + void* fFreeProcContext; + + SkDataTable(); + SkDataTable(const void* array, size_t elemSize, int count, + FreeProc, void* context); + SkDataTable(const Dir*, int count, FreeProc, void* context); + ~SkDataTable() override; + + friend class SkDataTableBuilder; // access to Dir + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkDeferredDisplayList.h b/gfx/skia/skia/include/core/SkDeferredDisplayList.h new file mode 100644 index 0000000000..07296360ba --- /dev/null +++ b/gfx/skia/skia/include/core/SkDeferredDisplayList.h @@ -0,0 +1,110 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDeferredDisplayList_DEFINED +#define SkDeferredDisplayList_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkSurfaceCharacterization.h" +#include "include/core/SkTypes.h" + +class SkDeferredDisplayListPriv; + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "include/private/base/SkTArray.h" +#include +class GrRenderTask; +class GrRenderTargetProxy; +#else +using GrRenderTargetProxy = SkRefCnt; +#endif + +/* + * This class contains pre-processed gpu operations that can be replayed into + * an SkSurface via SkSurface::draw(SkDeferredDisplayList*). + */ +class SkDeferredDisplayList : public SkNVRefCnt { +public: + SK_API ~SkDeferredDisplayList(); + + SK_API const SkSurfaceCharacterization& characterization() const { + return fCharacterization; + } + +#if defined(SK_GANESH) + /** + * Iterate through the programs required by the DDL. + */ + class SK_API ProgramIterator { + public: + ProgramIterator(GrDirectContext*, SkDeferredDisplayList*); + ~ProgramIterator(); + + // This returns true if any work was done. Getting a cache hit does not count as work. + bool compile(); + bool done() const; + void next(); + + private: + GrDirectContext* fDContext; + const SkTArray& fProgramData; + int fIndex; + }; +#endif + + // Provides access to functions that aren't part of the public API. + SkDeferredDisplayListPriv priv(); + const SkDeferredDisplayListPriv priv() const; // NOLINT(readability-const-return-type) + +private: + friend class GrDrawingManager; // for access to 'fRenderTasks', 'fLazyProxyData', 'fArenas' + friend class SkDeferredDisplayListRecorder; // for access to 'fLazyProxyData' + friend class SkDeferredDisplayListPriv; + + // This object is the source from which the lazy proxy backing the DDL will pull its backing + // texture when the DDL is replayed. It has to be separately ref counted bc the lazy proxy + // can outlive the DDL. + class LazyProxyData : public SkRefCnt { +#if defined(SK_GANESH) + public: + // Upon being replayed - this field will be filled in (by the DrawingManager) with the + // proxy backing the destination SkSurface. Note that, since there is no good place to + // clear it, it can become a dangling pointer. Additionally, since the renderTargetProxy + // doesn't get a ref here, the SkSurface that owns it must remain alive until the DDL + // is flushed. + // TODO: the drawing manager could ref the renderTargetProxy for the DDL and then add + // a renderingTask to unref it after the DDL's ops have been executed. + GrRenderTargetProxy* fReplayDest = nullptr; +#endif + }; + + SK_API SkDeferredDisplayList(const SkSurfaceCharacterization& characterization, + sk_sp fTargetProxy, + sk_sp); + +#if defined(SK_GANESH) + const SkTArray& programData() const { + return fProgramData; + } +#endif + + const SkSurfaceCharacterization fCharacterization; + +#if defined(SK_GANESH) + // These are ordered such that the destructor cleans op tasks up first (which may refer back + // to the arena and memory pool in their destructors). + GrRecordingContext::OwnedArenas fArenas; + SkTArray> fRenderTasks; + + SkTArray fProgramData; + sk_sp fTargetProxy; + sk_sp fLazyProxyData; +#endif +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkDeferredDisplayListRecorder.h b/gfx/skia/skia/include/core/SkDeferredDisplayListRecorder.h new file mode 100644 index 0000000000..67ee03fd6c --- /dev/null +++ b/gfx/skia/skia/include/core/SkDeferredDisplayListRecorder.h @@ -0,0 +1,97 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDeferredDisplayListRecorder_DEFINED +#define SkDeferredDisplayListRecorder_DEFINED + +#include "include/core/SkDeferredDisplayList.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSurfaceCharacterization.h" +#include "include/core/SkTypes.h" + +class GrBackendFormat; +class GrBackendTexture; +class GrRecordingContext; +class GrYUVABackendTextureInfo; +class SkCanvas; +class SkSurface; + +/* + * This class is intended to be used as: + * Get an SkSurfaceCharacterization representing the intended gpu-backed destination SkSurface + * Create one of these (an SkDeferredDisplayListRecorder) on the stack + * Get the canvas and render into it + * Snap off and hold on to an SkDeferredDisplayList + * Once your app actually needs the pixels, call SkSurface::draw(SkDeferredDisplayList*) + * + * This class never accesses the GPU but performs all the cpu work it can. It + * is thread-safe (i.e., one can break a scene into tiles and perform their cpu-side + * work in parallel ahead of time). + */ +class SK_API SkDeferredDisplayListRecorder { +public: + SkDeferredDisplayListRecorder(const SkSurfaceCharacterization&); + ~SkDeferredDisplayListRecorder(); + + const SkSurfaceCharacterization& characterization() const { + return fCharacterization; + } + + // The backing canvas will become invalid (and this entry point will return + // null) once 'detach' is called. + // Note: ownership of the SkCanvas is not transferred via this call. + SkCanvas* getCanvas(); + + sk_sp detach(); + +#if defined(SK_GANESH) + using PromiseImageTextureContext = SkImage::PromiseImageTextureContext; + using PromiseImageTextureFulfillProc = SkImage::PromiseImageTextureFulfillProc; + using PromiseImageTextureReleaseProc = SkImage::PromiseImageTextureReleaseProc; + +#ifndef SK_MAKE_PROMISE_TEXTURE_DISABLE_LEGACY_API + /** Deprecated: Use SkImage::MakePromiseTexture instead. */ + sk_sp makePromiseTexture(const GrBackendFormat& backendFormat, + int width, + int height, + GrMipmapped mipmapped, + GrSurfaceOrigin origin, + SkColorType colorType, + SkAlphaType alphaType, + sk_sp colorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContext); + + /** Deprecated: Use SkImage::MakePromiseYUVATexture instead. */ + sk_sp makeYUVAPromiseTexture(const GrYUVABackendTextureInfo& yuvaBackendTextureInfo, + sk_sp imageColorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContexts[]); +#endif // SK_MAKE_PROMISE_TEXTURE_DISABLE_LEGACY_API +#endif // defined(SK_GANESH) + +private: + SkDeferredDisplayListRecorder(const SkDeferredDisplayListRecorder&) = delete; + SkDeferredDisplayListRecorder& operator=(const SkDeferredDisplayListRecorder&) = delete; + + bool init(); + + const SkSurfaceCharacterization fCharacterization; + +#if defined(SK_GANESH) + sk_sp fContext; + sk_sp fTargetProxy; + sk_sp fLazyProxyData; + sk_sp fSurface; +#endif +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkDocument.h b/gfx/skia/skia/include/core/SkDocument.h new file mode 100644 index 0000000000..eacfb2c040 --- /dev/null +++ b/gfx/skia/skia/include/core/SkDocument.h @@ -0,0 +1,91 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDocument_DEFINED +#define SkDocument_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" + +class SkCanvas; +class SkWStream; +struct SkRect; + +/** SK_ScalarDefaultDPI is 72 dots per inch. */ +static constexpr SkScalar SK_ScalarDefaultRasterDPI = 72.0f; + +/** + * High-level API for creating a document-based canvas. To use.. + * + * 1. Create a document, specifying a stream to store the output. + * 2. For each "page" of content: + * a. canvas = doc->beginPage(...) + * b. draw_my_content(canvas); + * c. doc->endPage(); + * 3. Close the document with doc->close(). + */ +class SK_API SkDocument : public SkRefCnt { +public: + + /** + * Begin a new page for the document, returning the canvas that will draw + * into the page. The document owns this canvas, and it will go out of + * scope when endPage() or close() is called, or the document is deleted. + */ + SkCanvas* beginPage(SkScalar width, SkScalar height, const SkRect* content = nullptr); + + /** + * Call endPage() when the content for the current page has been drawn + * (into the canvas returned by beginPage()). After this call the canvas + * returned by beginPage() will be out-of-scope. + */ + void endPage(); + + /** + * Call close() when all pages have been drawn. This will close the file + * or stream holding the document's contents. After close() the document + * can no longer add new pages. Deleting the document will automatically + * call close() if need be. + */ + void close(); + + /** + * Call abort() to stop producing the document immediately. + * The stream output must be ignored, and should not be trusted. + */ + void abort(); + +protected: + SkDocument(SkWStream*); + + // note: subclasses must call close() in their destructor, as the base class + // cannot do this for them. + ~SkDocument() override; + + virtual SkCanvas* onBeginPage(SkScalar width, SkScalar height) = 0; + virtual void onEndPage() = 0; + virtual void onClose(SkWStream*) = 0; + virtual void onAbort() = 0; + + // Allows subclasses to write to the stream as pages are written. + SkWStream* getStream() { return fStream; } + + enum State { + kBetweenPages_State, + kInPage_State, + kClosed_State + }; + State getState() const { return fState; } + +private: + SkWStream* fStream; + State fState; + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkDrawLooper.h b/gfx/skia/skia/include/core/SkDrawLooper.h new file mode 100644 index 0000000000..69d341c25f --- /dev/null +++ b/gfx/skia/skia/include/core/SkDrawLooper.h @@ -0,0 +1,135 @@ + +/* + * Copyright 2011 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkDrawLooper_DEFINED +#define SkDrawLooper_DEFINED + +#include "include/core/SkBlurTypes.h" +#include "include/core/SkColor.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkPoint.h" +#include // std::function + +#ifndef SK_SUPPORT_LEGACY_DRAWLOOPER +#error "SkDrawLooper is unsupported" +#endif + +class SkArenaAlloc; +class SkCanvas; +class SkMatrix; +class SkPaint; +struct SkRect; + +/** \class SkDrawLooper + DEPRECATED: No longer supported in Skia. +*/ +class SK_API SkDrawLooper : public SkFlattenable { +public: + /** + * Holds state during a draw. Users call next() until it returns false. + * + * Subclasses of SkDrawLooper should create a subclass of this object to + * hold state specific to their subclass. + */ + class SK_API Context { + public: + Context() {} + virtual ~Context() {} + + struct Info { + SkVector fTranslate; + bool fApplyPostCTM; + + void applyToCTM(SkMatrix* ctm) const; + void applyToCanvas(SkCanvas*) const; + }; + + /** + * Called in a loop on objects returned by SkDrawLooper::createContext(). + * Each time true is returned, the object is drawn (possibly with a modified + * canvas and/or paint). When false is finally returned, drawing for the object + * stops. + * + * On each call, the paint will be in its original state, but the + * canvas will be as it was following the previous call to next() or + * createContext(). + * + * The implementation must ensure that, when next() finally returns + * false, the canvas has been restored to the state it was + * initially, before createContext() was first called. + */ + virtual bool next(Info*, SkPaint*) = 0; + + private: + Context(const Context&) = delete; + Context& operator=(const Context&) = delete; + }; + + /** + * Called right before something is being drawn. Returns a Context + * whose next() method should be called until it returns false. + */ + virtual Context* makeContext(SkArenaAlloc*) const = 0; + + /** + * The fast bounds functions are used to enable the paint to be culled early + * in the drawing pipeline. If a subclass can support this feature it must + * return true for the canComputeFastBounds() function. If that function + * returns false then computeFastBounds behavior is undefined otherwise it + * is expected to have the following behavior. Given the parent paint and + * the parent's bounding rect the subclass must fill in and return the + * storage rect, where the storage rect is with the union of the src rect + * and the looper's bounding rect. + */ + bool canComputeFastBounds(const SkPaint& paint) const; + void computeFastBounds(const SkPaint& paint, const SkRect& src, SkRect* dst) const; + + struct BlurShadowRec { + SkScalar fSigma; + SkVector fOffset; + SkColor fColor; + SkBlurStyle fStyle; + }; + /** + * If this looper can be interpreted as having two layers, such that + * 1. The first layer (bottom most) just has a blur and translate + * 2. The second layer has no modifications to either paint or canvas + * 3. No other layers. + * then return true, and if not null, fill out the BlurShadowRec). + * + * If any of the above are not met, return false and ignore the BlurShadowRec parameter. + */ + virtual bool asABlurShadow(BlurShadowRec*) const; + + static SkFlattenable::Type GetFlattenableType() { + return kSkDrawLooper_Type; + } + + SkFlattenable::Type getFlattenableType() const override { + return kSkDrawLooper_Type; + } + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr) { + return sk_sp(static_cast( + SkFlattenable::Deserialize( + kSkDrawLooper_Type, data, size, procs).release())); + } + + void apply(SkCanvas* canvas, const SkPaint& paint, + std::function); + +protected: + SkDrawLooper() {} + +private: + using INHERITED = SkFlattenable; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkDrawable.h b/gfx/skia/skia/include/core/SkDrawable.h new file mode 100644 index 0000000000..316bf058bc --- /dev/null +++ b/gfx/skia/skia/include/core/SkDrawable.h @@ -0,0 +1,175 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDrawable_DEFINED +#define SkDrawable_DEFINED + +#include "include/core/SkFlattenable.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkAPI.h" + +#include +#include +#include + +class GrBackendDrawableInfo; +class SkCanvas; +class SkMatrix; +class SkPicture; +enum class GrBackendApi : unsigned int; +struct SkDeserialProcs; +struct SkIRect; +struct SkImageInfo; +struct SkRect; + +/** + * Base-class for objects that draw into SkCanvas. + * + * The object has a generation ID, which is guaranteed to be unique across all drawables. To + * allow for clients of the drawable that may want to cache the results, the drawable must + * change its generation ID whenever its internal state changes such that it will draw differently. + */ +class SK_API SkDrawable : public SkFlattenable { +public: + /** + * Draws into the specified content. The drawing sequence will be balanced upon return + * (i.e. the saveLevel() on the canvas will match what it was when draw() was called, + * and the current matrix and clip settings will not be changed. + */ + void draw(SkCanvas*, const SkMatrix* = nullptr); + void draw(SkCanvas*, SkScalar x, SkScalar y); + + /** + * When using the GPU backend it is possible for a drawable to execute using the underlying 3D + * API rather than the SkCanvas API. It does so by creating a GpuDrawHandler. The GPU backend + * is deferred so the handler will be given access to the 3D API at the correct point in the + * drawing stream as the GPU backend flushes. Since the drawable may mutate, each time it is + * drawn to a GPU-backed canvas a new handler is snapped, representing the drawable's state at + * the time of the snap. + * + * When the GPU backend flushes to the 3D API it will call the draw method on the + * GpuDrawHandler. At this time the drawable may add commands to the stream of GPU commands for + * the unerlying 3D API. The draw function takes a GrBackendDrawableInfo which contains + * information about the current state of 3D API which the caller must respect. See + * GrBackendDrawableInfo for more specific details on what information is sent and the + * requirements for different 3D APIs. + * + * Additionaly there may be a slight delay from when the drawable adds its commands to when + * those commands are actually submitted to the GPU. Thus the drawable or GpuDrawHandler is + * required to keep any resources that are used by its added commands alive and valid until + * those commands are submitted to the GPU. The GpuDrawHandler will be kept alive and then + * deleted once the commands are submitted to the GPU. The dtor of the GpuDrawHandler is the + * signal to the drawable that the commands have all been submitted. Different 3D APIs may have + * additional requirements for certain resources which require waiting for the GPU to finish + * all work on those resources before reusing or deleting them. In this case, the drawable can + * use the dtor call of the GpuDrawHandler to add a fence to the GPU to track when the GPU work + * has completed. + * + * Currently this is only supported for the GPU Vulkan backend. + */ + + class GpuDrawHandler { + public: + virtual ~GpuDrawHandler() {} + + virtual void draw(const GrBackendDrawableInfo&) {} + }; + + /** + * Snaps off a GpuDrawHandler to represent the state of the SkDrawable at the time the snap is + * called. This is used for executing GPU backend specific draws intermixed with normal Skia GPU + * draws. The GPU API, which will be used for the draw, as well as the full matrix, device clip + * bounds and imageInfo of the target buffer are passed in as inputs. + */ + std::unique_ptr snapGpuDrawHandler(GrBackendApi backendApi, + const SkMatrix& matrix, + const SkIRect& clipBounds, + const SkImageInfo& bufferInfo) { + return this->onSnapGpuDrawHandler(backendApi, matrix, clipBounds, bufferInfo); + } + + SkPicture* newPictureSnapshot(); + + /** + * Return a unique value for this instance. If two calls to this return the same value, + * it is presumed that calling the draw() method will render the same thing as well. + * + * Subclasses that change their state should call notifyDrawingChanged() to ensure that + * a new value will be returned the next time it is called. + */ + uint32_t getGenerationID(); + + /** + * Return the (conservative) bounds of what the drawable will draw. If the drawable can + * change what it draws (e.g. animation or in response to some external change), then this + * must return a bounds that is always valid for all possible states. + */ + SkRect getBounds(); + + /** + * Return approximately how many bytes would be freed if this drawable is destroyed. + * The base implementation returns 0 to indicate that this is unknown. + */ + size_t approximateBytesUsed(); + + /** + * Calling this invalidates the previous generation ID, and causes a new one to be computed + * the next time getGenerationID() is called. Typically this is called by the object itself, + * in response to its internal state changing. + */ + void notifyDrawingChanged(); + + static SkFlattenable::Type GetFlattenableType() { + return kSkDrawable_Type; + } + + SkFlattenable::Type getFlattenableType() const override { + return kSkDrawable_Type; + } + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr) { + return sk_sp(static_cast( + SkFlattenable::Deserialize( + kSkDrawable_Type, data, size, procs).release())); + } + + Factory getFactory() const override { return nullptr; } + const char* getTypeName() const override { return nullptr; } + +protected: + SkDrawable(); + + virtual SkRect onGetBounds() = 0; + virtual size_t onApproximateBytesUsed(); + virtual void onDraw(SkCanvas*) = 0; + + virtual std::unique_ptr onSnapGpuDrawHandler(GrBackendApi, const SkMatrix&, + const SkIRect& /*clipBounds*/, + const SkImageInfo&) { + return nullptr; + } + + // TODO: Delete this once Android gets updated to take the clipBounds version above. + virtual std::unique_ptr onSnapGpuDrawHandler(GrBackendApi, const SkMatrix&) { + return nullptr; + } + + /** + * Default implementation calls onDraw() with a canvas that records into a picture. Subclasses + * may override if they have a more efficient way to return a picture for the current state + * of their drawable. Note: this picture must draw the same as what would be drawn from + * onDraw(). + */ + virtual SkPicture* onNewPictureSnapshot(); + +private: + int32_t fGenerationID; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkEncodedImageFormat.h b/gfx/skia/skia/include/core/SkEncodedImageFormat.h new file mode 100644 index 0000000000..0db3830b9a --- /dev/null +++ b/gfx/skia/skia/include/core/SkEncodedImageFormat.h @@ -0,0 +1,9 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// TODO(kjlubick) remove this shim after clients have been moved to the new location +#include "include/codec/SkEncodedImageFormat.h" // IWYU pragma: export diff --git a/gfx/skia/skia/include/core/SkExecutor.h b/gfx/skia/skia/include/core/SkExecutor.h new file mode 100644 index 0000000000..88e2ca6e52 --- /dev/null +++ b/gfx/skia/skia/include/core/SkExecutor.h @@ -0,0 +1,41 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkExecutor_DEFINED +#define SkExecutor_DEFINED + +#include +#include +#include "include/core/SkTypes.h" + +class SK_API SkExecutor { +public: + virtual ~SkExecutor(); + + // Create a thread pool SkExecutor with a fixed thread count, by default the number of cores. + static std::unique_ptr MakeFIFOThreadPool(int threads = 0, + bool allowBorrowing = true); + static std::unique_ptr MakeLIFOThreadPool(int threads = 0, + bool allowBorrowing = true); + + // There is always a default SkExecutor available by calling SkExecutor::GetDefault(). + static SkExecutor& GetDefault(); + static void SetDefault(SkExecutor*); // Does not take ownership. Not thread safe. + + // Add work to execute. + virtual void add(std::function) = 0; + + // If it makes sense for this executor, use this thread to execute work for a little while. + virtual void borrow() {} + +protected: + SkExecutor() = default; + SkExecutor(const SkExecutor&) = delete; + SkExecutor& operator=(const SkExecutor&) = delete; +}; + +#endif//SkExecutor_DEFINED diff --git a/gfx/skia/skia/include/core/SkFlattenable.h b/gfx/skia/skia/include/core/SkFlattenable.h new file mode 100644 index 0000000000..3585e845b5 --- /dev/null +++ b/gfx/skia/skia/include/core/SkFlattenable.h @@ -0,0 +1,115 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFlattenable_DEFINED +#define SkFlattenable_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +#include + +class SkData; +class SkReadBuffer; +class SkWriteBuffer; +struct SkDeserialProcs; +struct SkSerialProcs; + +/** \class SkFlattenable + + SkFlattenable is the base class for objects that need to be flattened + into a data stream for either transport or as part of the key to the + font cache. + */ +class SK_API SkFlattenable : public SkRefCnt { +public: + enum Type { + kSkColorFilter_Type, + kSkBlender_Type, + kSkDrawable_Type, + kSkDrawLooper_Type, // no longer used internally by Skia + kSkImageFilter_Type, + kSkMaskFilter_Type, + kSkPathEffect_Type, + kSkShader_Type, + }; + + typedef sk_sp (*Factory)(SkReadBuffer&); + + SkFlattenable() {} + + /** Implement this to return a factory function pointer that can be called + to recreate your class given a buffer (previously written to by your + override of flatten(). + */ + virtual Factory getFactory() const = 0; + + /** + * Returns the name of the object's class. + */ + virtual const char* getTypeName() const = 0; + + static Factory NameToFactory(const char name[]); + static const char* FactoryToName(Factory); + + static void Register(const char name[], Factory); + + /** + * Override this if your subclass needs to record data that it will need to recreate itself + * from its CreateProc (returned by getFactory()). + * + * DEPRECATED public : will move to protected ... use serialize() instead + */ + virtual void flatten(SkWriteBuffer&) const {} + + virtual Type getFlattenableType() const = 0; + + // + // public ways to serialize / deserialize + // + sk_sp serialize(const SkSerialProcs* = nullptr) const; + size_t serialize(void* memory, size_t memory_size, + const SkSerialProcs* = nullptr) const; + static sk_sp Deserialize(Type, const void* data, size_t length, + const SkDeserialProcs* procs = nullptr); + +protected: + class PrivateInitializer { + public: + static void InitEffects(); + static void InitImageFilters(); + }; + +private: + static void RegisterFlattenablesIfNeeded(); + static void Finalize(); + + friend class SkGraphics; + + using INHERITED = SkRefCnt; +}; + +#if defined(SK_DISABLE_EFFECT_DESERIALIZATION) + #define SK_REGISTER_FLATTENABLE(type) do{}while(false) + + #define SK_FLATTENABLE_HOOKS(type) \ + static sk_sp CreateProc(SkReadBuffer&); \ + friend class SkFlattenable::PrivateInitializer; \ + Factory getFactory() const override { return nullptr; } \ + const char* getTypeName() const override { return #type; } +#else + #define SK_REGISTER_FLATTENABLE(type) \ + SkFlattenable::Register(#type, type::CreateProc) + + #define SK_FLATTENABLE_HOOKS(type) \ + static sk_sp CreateProc(SkReadBuffer&); \ + friend class SkFlattenable::PrivateInitializer; \ + Factory getFactory() const override { return type::CreateProc; } \ + const char* getTypeName() const override { return #type; } +#endif + +#endif diff --git a/gfx/skia/skia/include/core/SkFont.h b/gfx/skia/skia/include/core/SkFont.h new file mode 100644 index 0000000000..88e92694bd --- /dev/null +++ b/gfx/skia/skia/include/core/SkFont.h @@ -0,0 +1,540 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFont_DEFINED +#define SkFont_DEFINED + +#include "include/core/SkFontTypes.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkTemplates.h" + +#include + +class SkMatrix; +class SkPaint; +class SkPath; +struct SkFontMetrics; + +/** \class SkFont + SkFont controls options applied when drawing and measuring text. +*/ +class SK_API SkFont { +public: + /** Whether edge pixels draw opaque or with partial transparency. + */ + enum class Edging { + kAlias, //!< no transparent pixels on glyph edges + kAntiAlias, //!< may have transparent pixels on glyph edges + kSubpixelAntiAlias, //!< glyph positioned in pixel using transparency + }; + + /** Constructs SkFont with default values. + + @return default initialized SkFont + */ + SkFont(); + + /** Constructs SkFont with default values with SkTypeface and size in points. + + @param typeface font and style used to draw and measure text + @param size typographic height of text + @return initialized SkFont + */ + SkFont(sk_sp typeface, SkScalar size); + + /** Constructs SkFont with default values with SkTypeface. + + @param typeface font and style used to draw and measure text + @return initialized SkFont + */ + explicit SkFont(sk_sp typeface); + + + /** Constructs SkFont with default values with SkTypeface and size in points, + horizontal scale, and horizontal skew. Horizontal scale emulates condensed + and expanded fonts. Horizontal skew emulates oblique fonts. + + @param typeface font and style used to draw and measure text + @param size typographic height of text + @param scaleX text horizontal scale + @param skewX additional shear on x-axis relative to y-axis + @return initialized SkFont + */ + SkFont(sk_sp typeface, SkScalar size, SkScalar scaleX, SkScalar skewX); + + + /** Compares SkFont and font, and returns true if they are equivalent. + May return false if SkTypeface has identical contents but different pointers. + + @param font font to compare + @return true if SkFont pair are equivalent + */ + bool operator==(const SkFont& font) const; + + /** Compares SkFont and font, and returns true if they are not equivalent. + May return true if SkTypeface has identical contents but different pointers. + + @param font font to compare + @return true if SkFont pair are not equivalent + */ + bool operator!=(const SkFont& font) const { return !(*this == font); } + + /** If true, instructs the font manager to always hint glyphs. + Returned value is only meaningful if platform uses FreeType as the font manager. + + @return true if all glyphs are hinted + */ + bool isForceAutoHinting() const { return SkToBool(fFlags & kForceAutoHinting_PrivFlag); } + + /** Returns true if font engine may return glyphs from font bitmaps instead of from outlines. + + @return true if glyphs may be font bitmaps + */ + bool isEmbeddedBitmaps() const { return SkToBool(fFlags & kEmbeddedBitmaps_PrivFlag); } + + /** Returns true if glyphs may be drawn at sub-pixel offsets. + + @return true if glyphs may be drawn at sub-pixel offsets. + */ + bool isSubpixel() const { return SkToBool(fFlags & kSubpixel_PrivFlag); } + + /** Returns true if font and glyph metrics are requested to be linearly scalable. + + @return true if font and glyph metrics are requested to be linearly scalable. + */ + bool isLinearMetrics() const { return SkToBool(fFlags & kLinearMetrics_PrivFlag); } + + /** Returns true if bold is approximated by increasing the stroke width when creating glyph + bitmaps from outlines. + + @return bold is approximated through stroke width + */ + bool isEmbolden() const { return SkToBool(fFlags & kEmbolden_PrivFlag); } + + /** Returns true if baselines will be snapped to pixel positions when the current transformation + matrix is axis aligned. + + @return baselines may be snapped to pixels + */ + bool isBaselineSnap() const { return SkToBool(fFlags & kBaselineSnap_PrivFlag); } + + /** Sets whether to always hint glyphs. + If forceAutoHinting is set, instructs the font manager to always hint glyphs. + + Only affects platforms that use FreeType as the font manager. + + @param forceAutoHinting setting to always hint glyphs + */ + void setForceAutoHinting(bool forceAutoHinting); + + /** Requests, but does not require, to use bitmaps in fonts instead of outlines. + + @param embeddedBitmaps setting to use bitmaps in fonts + */ + void setEmbeddedBitmaps(bool embeddedBitmaps); + + /** Requests, but does not require, that glyphs respect sub-pixel positioning. + + @param subpixel setting for sub-pixel positioning + */ + void setSubpixel(bool subpixel); + + /** Requests, but does not require, linearly scalable font and glyph metrics. + + For outline fonts 'true' means font and glyph metrics should ignore hinting and rounding. + Note that some bitmap formats may not be able to scale linearly and will ignore this flag. + + @param linearMetrics setting for linearly scalable font and glyph metrics. + */ + void setLinearMetrics(bool linearMetrics); + + /** Increases stroke width when creating glyph bitmaps to approximate a bold typeface. + + @param embolden setting for bold approximation + */ + void setEmbolden(bool embolden); + + /** Requests that baselines be snapped to pixels when the current transformation matrix is axis + aligned. + + @param baselineSnap setting for baseline snapping to pixels + */ + void setBaselineSnap(bool baselineSnap); + + /** Whether edge pixels draw opaque or with partial transparency. + */ + Edging getEdging() const { return (Edging)fEdging; } + + /** Requests, but does not require, that edge pixels draw opaque or with + partial transparency. + */ + void setEdging(Edging edging); + + /** Sets level of glyph outline adjustment. + Does not check for valid values of hintingLevel. + */ + void setHinting(SkFontHinting hintingLevel); + + /** Returns level of glyph outline adjustment. + */ + SkFontHinting getHinting() const { return (SkFontHinting)fHinting; } + + /** Returns a font with the same attributes of this font, but with the specified size. + Returns nullptr if size is less than zero, infinite, or NaN. + + @param size typographic height of text + @return initialized SkFont + */ + SkFont makeWithSize(SkScalar size) const; + + /** Returns SkTypeface if set, or nullptr. + Does not alter SkTypeface SkRefCnt. + + @return SkTypeface if previously set, nullptr otherwise + */ + SkTypeface* getTypeface() const {return fTypeface.get(); } + + /** Returns SkTypeface if set, or the default typeface. + Does not alter SkTypeface SkRefCnt. + + @return SkTypeface if previously set or, a pointer to the default typeface if not + previously set. + */ + SkTypeface* getTypefaceOrDefault() const; + + /** Returns text size in points. + + @return typographic height of text + */ + SkScalar getSize() const { return fSize; } + + /** Returns text scale on x-axis. + Default value is 1. + + @return text horizontal scale + */ + SkScalar getScaleX() const { return fScaleX; } + + /** Returns text skew on x-axis. + Default value is zero. + + @return additional shear on x-axis relative to y-axis + */ + SkScalar getSkewX() const { return fSkewX; } + + /** Increases SkTypeface SkRefCnt by one. + + @return SkTypeface if previously set, nullptr otherwise + */ + sk_sp refTypeface() const { return fTypeface; } + + /** Increases SkTypeface SkRefCnt by one. + + @return SkTypeface if previously set or, a pointer to the default typeface if not + previously set. + */ + sk_sp refTypefaceOrDefault() const; + + /** Sets SkTypeface to typeface, decreasing SkRefCnt of the previous SkTypeface. + Pass nullptr to clear SkTypeface and use the default typeface. Increments + tf SkRefCnt by one. + + @param tf font and style used to draw text + */ + void setTypeface(sk_sp tf) { fTypeface = tf; } + + /** Sets text size in points. + Has no effect if textSize is not greater than or equal to zero. + + @param textSize typographic height of text + */ + void setSize(SkScalar textSize); + + /** Sets text scale on x-axis. + Default value is 1. + + @param scaleX text horizontal scale + */ + void setScaleX(SkScalar scaleX); + + /** Sets text skew on x-axis. + Default value is zero. + + @param skewX additional shear on x-axis relative to y-axis + */ + void setSkewX(SkScalar skewX); + + /** Converts text into glyph indices. + Returns the number of glyph indices represented by text. + SkTextEncoding specifies how text represents characters or glyphs. + glyphs may be nullptr, to compute the glyph count. + + Does not check text for valid character codes or valid glyph indices. + + If byteLength equals zero, returns zero. + If byteLength includes a partial character, the partial character is ignored. + + If encoding is SkTextEncoding::kUTF8 and text contains an invalid UTF-8 sequence, + zero is returned. + + When encoding is SkTextEncoding::kUTF8, SkTextEncoding::kUTF16, or + SkTextEncoding::kUTF32; then each Unicode codepoint is mapped to a + single glyph. This function uses the default character-to-glyph + mapping from the SkTypeface and maps characters not found in the + SkTypeface to zero. + + If maxGlyphCount is not sufficient to store all the glyphs, no glyphs are copied. + The total glyph count is returned for subsequent buffer reallocation. + + @param text character storage encoded with SkTextEncoding + @param byteLength length of character storage in bytes + @param glyphs storage for glyph indices; may be nullptr + @param maxGlyphCount storage capacity + @return number of glyphs represented by text of length byteLength + */ + int textToGlyphs(const void* text, size_t byteLength, SkTextEncoding encoding, + SkGlyphID glyphs[], int maxGlyphCount) const; + + /** Returns glyph index for Unicode character. + + If the character is not supported by the SkTypeface, returns 0. + + @param uni Unicode character + @return glyph index + */ + SkGlyphID unicharToGlyph(SkUnichar uni) const; + + void unicharsToGlyphs(const SkUnichar uni[], int count, SkGlyphID glyphs[]) const; + + /** Returns number of glyphs represented by text. + + If encoding is SkTextEncoding::kUTF8, SkTextEncoding::kUTF16, or + SkTextEncoding::kUTF32; then each Unicode codepoint is mapped to a + single glyph. + + @param text character storage encoded with SkTextEncoding + @param byteLength length of character storage in bytes + @return number of glyphs represented by text of length byteLength + */ + int countText(const void* text, size_t byteLength, SkTextEncoding encoding) const { + return this->textToGlyphs(text, byteLength, encoding, nullptr, 0); + } + + /** Returns the advance width of text. + The advance is the normal distance to move before drawing additional text. + Returns the bounding box of text if bounds is not nullptr. + + @param text character storage encoded with SkTextEncoding + @param byteLength length of character storage in bytes + @param bounds returns bounding box relative to (0, 0) if not nullptr + @return the sum of the default advance widths + */ + SkScalar measureText(const void* text, size_t byteLength, SkTextEncoding encoding, + SkRect* bounds = nullptr) const { + return this->measureText(text, byteLength, encoding, bounds, nullptr); + } + + /** Returns the advance width of text. + The advance is the normal distance to move before drawing additional text. + Returns the bounding box of text if bounds is not nullptr. The paint + stroke settings, mask filter, or path effect may modify the bounds. + + @param text character storage encoded with SkTextEncoding + @param byteLength length of character storage in bytes + @param bounds returns bounding box relative to (0, 0) if not nullptr + @param paint optional; may be nullptr + @return the sum of the default advance widths + */ + SkScalar measureText(const void* text, size_t byteLength, SkTextEncoding encoding, + SkRect* bounds, const SkPaint* paint) const; + + /** DEPRECATED + Retrieves the advance and bounds for each glyph in glyphs. + Both widths and bounds may be nullptr. + If widths is not nullptr, widths must be an array of count entries. + if bounds is not nullptr, bounds must be an array of count entries. + + @param glyphs array of glyph indices to be measured + @param count number of glyphs + @param widths returns text advances for each glyph; may be nullptr + @param bounds returns bounds for each glyph relative to (0, 0); may be nullptr + */ + void getWidths(const SkGlyphID glyphs[], int count, SkScalar widths[], SkRect bounds[]) const { + this->getWidthsBounds(glyphs, count, widths, bounds, nullptr); + } + + // DEPRECATED + void getWidths(const SkGlyphID glyphs[], int count, SkScalar widths[], std::nullptr_t) const { + this->getWidths(glyphs, count, widths); + } + + /** Retrieves the advance and bounds for each glyph in glyphs. + Both widths and bounds may be nullptr. + If widths is not nullptr, widths must be an array of count entries. + if bounds is not nullptr, bounds must be an array of count entries. + + @param glyphs array of glyph indices to be measured + @param count number of glyphs + @param widths returns text advances for each glyph + */ + void getWidths(const SkGlyphID glyphs[], int count, SkScalar widths[]) const { + this->getWidthsBounds(glyphs, count, widths, nullptr, nullptr); + } + + /** Retrieves the advance and bounds for each glyph in glyphs. + Both widths and bounds may be nullptr. + If widths is not nullptr, widths must be an array of count entries. + if bounds is not nullptr, bounds must be an array of count entries. + + @param glyphs array of glyph indices to be measured + @param count number of glyphs + @param widths returns text advances for each glyph; may be nullptr + @param bounds returns bounds for each glyph relative to (0, 0); may be nullptr + @param paint optional, specifies stroking, SkPathEffect and SkMaskFilter + */ + void getWidthsBounds(const SkGlyphID glyphs[], int count, SkScalar widths[], SkRect bounds[], + const SkPaint* paint) const; + + + /** Retrieves the bounds for each glyph in glyphs. + bounds must be an array of count entries. + If paint is not nullptr, its stroking, SkPathEffect, and SkMaskFilter fields are respected. + + @param glyphs array of glyph indices to be measured + @param count number of glyphs + @param bounds returns bounds for each glyph relative to (0, 0); may be nullptr + @param paint optional, specifies stroking, SkPathEffect, and SkMaskFilter + */ + void getBounds(const SkGlyphID glyphs[], int count, SkRect bounds[], + const SkPaint* paint) const { + this->getWidthsBounds(glyphs, count, nullptr, bounds, paint); + } + + /** Retrieves the positions for each glyph, beginning at the specified origin. The caller + must allocated at least count number of elements in the pos[] array. + + @param glyphs array of glyph indices to be positioned + @param count number of glyphs + @param pos returns glyphs positions + @param origin location of the first glyph. Defaults to {0, 0}. + */ + void getPos(const SkGlyphID glyphs[], int count, SkPoint pos[], SkPoint origin = {0, 0}) const; + + /** Retrieves the x-positions for each glyph, beginning at the specified origin. The caller + must allocated at least count number of elements in the xpos[] array. + + @param glyphs array of glyph indices to be positioned + @param count number of glyphs + @param xpos returns glyphs x-positions + @param origin x-position of the first glyph. Defaults to 0. + */ + void getXPos(const SkGlyphID glyphs[], int count, SkScalar xpos[], SkScalar origin = 0) const; + + /** Returns intervals [start, end] describing lines parallel to the advance that intersect + * with the glyphs. + * + * @param glyphs the glyphs to intersect + * @param count the number of glyphs and positions + * @param pos the position of each glyph + * @param top the top of the line intersecting + * @param bottom the bottom of the line intersecting + @return array of pairs of x values [start, end]. May be empty. + */ + std::vector getIntercepts(const SkGlyphID glyphs[], int count, const SkPoint pos[], + SkScalar top, SkScalar bottom, + const SkPaint* = nullptr) const; + + /** Modifies path to be the outline of the glyph. + If the glyph has an outline, modifies path to be the glyph's outline and returns true. + The glyph outline may be empty. Degenerate contours in the glyph outline will be skipped. + If glyph is described by a bitmap, returns false and ignores path parameter. + + @param glyphID index of glyph + @param path pointer to existing SkPath + @return true if glyphID is described by path + */ + bool getPath(SkGlyphID glyphID, SkPath* path) const; + + /** Returns path corresponding to glyph array. + + @param glyphIDs array of glyph indices + @param count number of glyphs + @param glyphPathProc function returning one glyph description as path + @param ctx function context + */ + void getPaths(const SkGlyphID glyphIDs[], int count, + void (*glyphPathProc)(const SkPath* pathOrNull, const SkMatrix& mx, void* ctx), + void* ctx) const; + + /** Returns SkFontMetrics associated with SkTypeface. + The return value is the recommended spacing between lines: the sum of metrics + descent, ascent, and leading. + If metrics is not nullptr, SkFontMetrics is copied to metrics. + Results are scaled by text size but does not take into account + dimensions required by text scale, text skew, fake bold, + style stroke, and SkPathEffect. + + @param metrics storage for SkFontMetrics; may be nullptr + @return recommended spacing between lines + */ + SkScalar getMetrics(SkFontMetrics* metrics) const; + + /** Returns the recommended spacing between lines: the sum of metrics + descent, ascent, and leading. + Result is scaled by text size but does not take into account + dimensions required by stroking and SkPathEffect. + Returns the same result as getMetrics(). + + @return recommended spacing between lines + */ + SkScalar getSpacing() const { return this->getMetrics(nullptr); } + + /** Dumps fields of the font to SkDebugf. May change its output over time, so clients should + * not rely on this for anything specific. Used to aid in debugging. + */ + void dump() const; + + using sk_is_trivially_relocatable = std::true_type; + +private: + enum PrivFlags { + kForceAutoHinting_PrivFlag = 1 << 0, + kEmbeddedBitmaps_PrivFlag = 1 << 1, + kSubpixel_PrivFlag = 1 << 2, + kLinearMetrics_PrivFlag = 1 << 3, + kEmbolden_PrivFlag = 1 << 4, + kBaselineSnap_PrivFlag = 1 << 5, + }; + + static constexpr unsigned kAllFlags = kForceAutoHinting_PrivFlag + | kEmbeddedBitmaps_PrivFlag + | kSubpixel_PrivFlag + | kLinearMetrics_PrivFlag + | kEmbolden_PrivFlag + | kBaselineSnap_PrivFlag; + + sk_sp fTypeface; + SkScalar fSize; + SkScalar fScaleX; + SkScalar fSkewX; + uint8_t fFlags; + uint8_t fEdging; + uint8_t fHinting; + + static_assert(::sk_is_trivially_relocatable::value); + + SkScalar setupForAsPaths(SkPaint*); + bool hasSomeAntiAliasing() const; + + friend class SkFontPriv; + friend class SkGlyphRunListPainterCPU; + friend class SkStrikeSpec; + friend class SkRemoteGlyphCacheTest; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkFontArguments.h b/gfx/skia/skia/include/core/SkFontArguments.h new file mode 100644 index 0000000000..a5139bb21b --- /dev/null +++ b/gfx/skia/skia/include/core/SkFontArguments.h @@ -0,0 +1,94 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontArguments_DEFINED +#define SkFontArguments_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +/** Represents a set of actual arguments for a font. */ +struct SkFontArguments { + struct VariationPosition { + struct Coordinate { + SkFourByteTag axis; + float value; + }; + const Coordinate* coordinates; + int coordinateCount; + }; + + /** Specify a palette to use and overrides for palette entries. + * + * `overrides` is a list of pairs of palette entry index and color. + * The overriden palette entries will use the associated color. + * Override pairs with palette entry indices out of range will not be applied. + * Later override entries override earlier ones. + */ + struct Palette { + struct Override { + int index; + SkColor color; + }; + int index; + const Override* overrides; + int overrideCount; + }; + + SkFontArguments() + : fCollectionIndex(0) + , fVariationDesignPosition{nullptr, 0} + , fPalette{0, nullptr, 0} {} + + /** Specify the index of the desired font. + * + * Font formats like ttc, dfont, cff, cid, pfr, t42, t1, and fon may actually be indexed + * collections of fonts. + */ + SkFontArguments& setCollectionIndex(int collectionIndex) { + fCollectionIndex = collectionIndex; + return *this; + } + + /** Specify a position in the variation design space. + * + * Any axis not specified will use the default value. + * Any specified axis not actually present in the font will be ignored. + * + * @param position not copied. The value must remain valid for life of SkFontArguments. + */ + SkFontArguments& setVariationDesignPosition(VariationPosition position) { + fVariationDesignPosition.coordinates = position.coordinates; + fVariationDesignPosition.coordinateCount = position.coordinateCount; + return *this; + } + + int getCollectionIndex() const { + return fCollectionIndex; + } + + VariationPosition getVariationDesignPosition() const { + return fVariationDesignPosition; + } + + SkFontArguments& setPalette(Palette palette) { + fPalette.index = palette.index; + fPalette.overrides = palette.overrides; + fPalette.overrideCount = palette.overrideCount; + return *this; + } + + Palette getPalette() const { return fPalette; } + +private: + int fCollectionIndex; + VariationPosition fVariationDesignPosition; + Palette fPalette; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkFontMetrics.h b/gfx/skia/skia/include/core/SkFontMetrics.h new file mode 100644 index 0000000000..f496039311 --- /dev/null +++ b/gfx/skia/skia/include/core/SkFontMetrics.h @@ -0,0 +1,139 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMetrics_DEFINED +#define SkFontMetrics_DEFINED + +#include "include/core/SkScalar.h" +#include "include/private/base/SkTo.h" + +/** \class SkFontMetrics + The metrics of an SkFont. + The metric values are consistent with the Skia y-down coordinate system. + */ +struct SK_API SkFontMetrics { + bool operator==(const SkFontMetrics& that) { + return + this->fFlags == that.fFlags && + this->fTop == that.fTop && + this->fAscent == that.fAscent && + this->fDescent == that.fDescent && + this->fBottom == that.fBottom && + this->fLeading == that.fLeading && + this->fAvgCharWidth == that.fAvgCharWidth && + this->fMaxCharWidth == that.fMaxCharWidth && + this->fXMin == that.fXMin && + this->fXMax == that.fXMax && + this->fXHeight == that.fXHeight && + this->fCapHeight == that.fCapHeight && + this->fUnderlineThickness == that.fUnderlineThickness && + this->fUnderlinePosition == that.fUnderlinePosition && + this->fStrikeoutThickness == that.fStrikeoutThickness && + this->fStrikeoutPosition == that.fStrikeoutPosition; + } + + /** \enum FontMetricsFlags + FontMetricsFlags indicate when certain metrics are valid; + the underline or strikeout metrics may be valid and zero. + Fonts with embedded bitmaps may not have valid underline or strikeout metrics. + */ + enum FontMetricsFlags { + kUnderlineThicknessIsValid_Flag = 1 << 0, //!< set if fUnderlineThickness is valid + kUnderlinePositionIsValid_Flag = 1 << 1, //!< set if fUnderlinePosition is valid + kStrikeoutThicknessIsValid_Flag = 1 << 2, //!< set if fStrikeoutThickness is valid + kStrikeoutPositionIsValid_Flag = 1 << 3, //!< set if fStrikeoutPosition is valid + kBoundsInvalid_Flag = 1 << 4, //!< set if fTop, fBottom, fXMin, fXMax invalid + }; + + uint32_t fFlags; //!< FontMetricsFlags indicating which metrics are valid + SkScalar fTop; //!< greatest extent above origin of any glyph bounding box, typically negative; deprecated with variable fonts + SkScalar fAscent; //!< distance to reserve above baseline, typically negative + SkScalar fDescent; //!< distance to reserve below baseline, typically positive + SkScalar fBottom; //!< greatest extent below origin of any glyph bounding box, typically positive; deprecated with variable fonts + SkScalar fLeading; //!< distance to add between lines, typically positive or zero + SkScalar fAvgCharWidth; //!< average character width, zero if unknown + SkScalar fMaxCharWidth; //!< maximum character width, zero if unknown + SkScalar fXMin; //!< greatest extent to left of origin of any glyph bounding box, typically negative; deprecated with variable fonts + SkScalar fXMax; //!< greatest extent to right of origin of any glyph bounding box, typically positive; deprecated with variable fonts + SkScalar fXHeight; //!< height of lower-case 'x', zero if unknown, typically negative + SkScalar fCapHeight; //!< height of an upper-case letter, zero if unknown, typically negative + SkScalar fUnderlineThickness; //!< underline thickness + SkScalar fUnderlinePosition; //!< distance from baseline to top of stroke, typically positive + SkScalar fStrikeoutThickness; //!< strikeout thickness + SkScalar fStrikeoutPosition; //!< distance from baseline to bottom of stroke, typically negative + + /** Returns true if SkFontMetrics has a valid underline thickness, and sets + thickness to that value. If the underline thickness is not valid, + return false, and ignore thickness. + + @param thickness storage for underline width + @return true if font specifies underline width + */ + bool hasUnderlineThickness(SkScalar* thickness) const { + if (SkToBool(fFlags & kUnderlineThicknessIsValid_Flag)) { + *thickness = fUnderlineThickness; + return true; + } + return false; + } + + /** Returns true if SkFontMetrics has a valid underline position, and sets + position to that value. If the underline position is not valid, + return false, and ignore position. + + @param position storage for underline position + @return true if font specifies underline position + */ + bool hasUnderlinePosition(SkScalar* position) const { + if (SkToBool(fFlags & kUnderlinePositionIsValid_Flag)) { + *position = fUnderlinePosition; + return true; + } + return false; + } + + /** Returns true if SkFontMetrics has a valid strikeout thickness, and sets + thickness to that value. If the underline thickness is not valid, + return false, and ignore thickness. + + @param thickness storage for strikeout width + @return true if font specifies strikeout width + */ + bool hasStrikeoutThickness(SkScalar* thickness) const { + if (SkToBool(fFlags & kStrikeoutThicknessIsValid_Flag)) { + *thickness = fStrikeoutThickness; + return true; + } + return false; + } + + /** Returns true if SkFontMetrics has a valid strikeout position, and sets + position to that value. If the underline position is not valid, + return false, and ignore position. + + @param position storage for strikeout position + @return true if font specifies strikeout position + */ + bool hasStrikeoutPosition(SkScalar* position) const { + if (SkToBool(fFlags & kStrikeoutPositionIsValid_Flag)) { + *position = fStrikeoutPosition; + return true; + } + return false; + } + + /** Returns true if SkFontMetrics has a valid fTop, fBottom, fXMin, and fXMax. + If the bounds are not valid, return false. + + @return true if font specifies maximum glyph bounds + */ + bool hasBounds() const { + return !SkToBool(fFlags & kBoundsInvalid_Flag); + } +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkFontMgr.h b/gfx/skia/skia/include/core/SkFontMgr.h new file mode 100644 index 0000000000..5b988c0074 --- /dev/null +++ b/gfx/skia/skia/include/core/SkFontMgr.h @@ -0,0 +1,162 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_DEFINED +#define SkFontMgr_DEFINED + +#include "include/core/SkFontArguments.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +#include + +class SkData; +class SkFontData; +class SkStreamAsset; +class SkString; +class SkTypeface; + +class SK_API SkFontStyleSet : public SkRefCnt { +public: + virtual int count() = 0; + virtual void getStyle(int index, SkFontStyle*, SkString* style) = 0; + virtual SkTypeface* createTypeface(int index) = 0; + virtual SkTypeface* matchStyle(const SkFontStyle& pattern) = 0; + + static SkFontStyleSet* CreateEmpty(); + +protected: + SkTypeface* matchStyleCSS3(const SkFontStyle& pattern); + +private: + using INHERITED = SkRefCnt; +}; + +class SK_API SkFontMgr : public SkRefCnt { +public: + int countFamilies() const; + void getFamilyName(int index, SkString* familyName) const; + SkFontStyleSet* createStyleSet(int index) const; + + /** + * The caller must call unref() on the returned object. + * Never returns NULL; will return an empty set if the name is not found. + * + * Passing nullptr as the parameter will return the default system family. + * Note that most systems don't have a default system family, so passing nullptr will often + * result in the empty set. + * + * It is possible that this will return a style set not accessible from + * createStyleSet(int) due to hidden or auto-activated fonts. + */ + SkFontStyleSet* matchFamily(const char familyName[]) const; + + /** + * Find the closest matching typeface to the specified familyName and style + * and return a ref to it. The caller must call unref() on the returned + * object. Will return nullptr if no 'good' match is found. + * + * Passing |nullptr| as the parameter for |familyName| will return the + * default system font. + * + * It is possible that this will return a style set not accessible from + * createStyleSet(int) or matchFamily(const char[]) due to hidden or + * auto-activated fonts. + */ + SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&) const; + + /** + * Use the system fallback to find a typeface for the given character. + * Note that bcp47 is a combination of ISO 639, 15924, and 3166-1 codes, + * so it is fine to just pass a ISO 639 here. + * + * Will return NULL if no family can be found for the character + * in the system fallback. + * + * Passing |nullptr| as the parameter for |familyName| will return the + * default system font. + * + * bcp47[0] is the least significant fallback, bcp47[bcp47Count-1] is the + * most significant. If no specified bcp47 codes match, any font with the + * requested character will be matched. + */ + SkTypeface* matchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const; + + /** + * Create a typeface for the specified data and TTC index (pass 0 for none) + * or NULL if the data is not recognized. The caller must call unref() on + * the returned object if it is not null. + */ + sk_sp makeFromData(sk_sp, int ttcIndex = 0) const; + + /** + * Create a typeface for the specified stream and TTC index + * (pass 0 for none) or NULL if the stream is not recognized. The caller + * must call unref() on the returned object if it is not null. + */ + sk_sp makeFromStream(std::unique_ptr, int ttcIndex = 0) const; + + /* Experimental, API subject to change. */ + sk_sp makeFromStream(std::unique_ptr, const SkFontArguments&) const; + + /** + * Create a typeface for the specified fileName and TTC index + * (pass 0 for none) or NULL if the file is not found, or its contents are + * not recognized. The caller must call unref() on the returned object + * if it is not null. + */ + sk_sp makeFromFile(const char path[], int ttcIndex = 0) const; + + sk_sp legacyMakeTypeface(const char familyName[], SkFontStyle style) const; + + /** Return the default fontmgr. */ + static sk_sp RefDefault(); + + /* Returns an empty font manager without any typeface dependencies */ + static sk_sp RefEmpty(); + +protected: + virtual int onCountFamilies() const = 0; + virtual void onGetFamilyName(int index, SkString* familyName) const = 0; + virtual SkFontStyleSet* onCreateStyleSet(int index)const = 0; + + /** May return NULL if the name is not found. */ + virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const = 0; + + virtual SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle&) const = 0; + virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const = 0; + + virtual sk_sp onMakeFromData(sk_sp, int ttcIndex) const = 0; + virtual sk_sp onMakeFromStreamIndex(std::unique_ptr, + int ttcIndex) const = 0; + virtual sk_sp onMakeFromStreamArgs(std::unique_ptr, + const SkFontArguments&) const = 0; + virtual sk_sp onMakeFromFile(const char path[], int ttcIndex) const = 0; + + virtual sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle) const = 0; + + // this method is never called -- will be removed + virtual SkTypeface* onMatchFaceStyle(const SkTypeface*, + const SkFontStyle&) const { + return nullptr; + } + +private: + + /** Implemented by porting layer to return the default factory. */ + static sk_sp Factory(); + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkFontParameters.h b/gfx/skia/skia/include/core/SkFontParameters.h new file mode 100644 index 0000000000..ae4f1d68b6 --- /dev/null +++ b/gfx/skia/skia/include/core/SkFontParameters.h @@ -0,0 +1,42 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontParameters_DEFINED +#define SkFontParameters_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +struct SkFontParameters { + struct Variation { + // Parameters in a variation font axis. + struct Axis { + constexpr Axis() : tag(0), min(0), def(0), max(0), flags(0) {} + constexpr Axis(SkFourByteTag tag, float min, float def, float max, bool hidden) : + tag(tag), min(min), def(def), max(max), flags(hidden ? HIDDEN : 0) {} + + // Four character identifier of the font axis (weight, width, slant, italic...). + SkFourByteTag tag; + // Minimum value supported by this axis. + float min; + // Default value set by this axis. + float def; + // Maximum value supported by this axis. The maximum can equal the minimum. + float max; + // Return whether this axis is recommended to be remain hidden in user interfaces. + bool isHidden() const { return flags & HIDDEN; } + // Set this axis to be remain hidden in user interfaces. + void setHidden(bool hidden) { flags = hidden ? (flags | HIDDEN) : (flags & ~HIDDEN); } + private: + static constexpr uint16_t HIDDEN = 0x0001; + // Attributes for a font axis. + uint16_t flags; + }; + }; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkFontStyle.h b/gfx/skia/skia/include/core/SkFontStyle.h new file mode 100644 index 0000000000..be46b53bb2 --- /dev/null +++ b/gfx/skia/skia/include/core/SkFontStyle.h @@ -0,0 +1,84 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontStyle_DEFINED +#define SkFontStyle_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkTPin.h" + +#include + +class SK_API SkFontStyle { +public: + enum Weight { + kInvisible_Weight = 0, + kThin_Weight = 100, + kExtraLight_Weight = 200, + kLight_Weight = 300, + kNormal_Weight = 400, + kMedium_Weight = 500, + kSemiBold_Weight = 600, + kBold_Weight = 700, + kExtraBold_Weight = 800, + kBlack_Weight = 900, + kExtraBlack_Weight = 1000, + }; + + enum Width { + kUltraCondensed_Width = 1, + kExtraCondensed_Width = 2, + kCondensed_Width = 3, + kSemiCondensed_Width = 4, + kNormal_Width = 5, + kSemiExpanded_Width = 6, + kExpanded_Width = 7, + kExtraExpanded_Width = 8, + kUltraExpanded_Width = 9, + }; + + enum Slant { + kUpright_Slant, + kItalic_Slant, + kOblique_Slant, + }; + + constexpr SkFontStyle(int weight, int width, Slant slant) : fValue( + (SkTPin(weight, kInvisible_Weight, kExtraBlack_Weight)) + + (SkTPin(width, kUltraCondensed_Width, kUltraExpanded_Width) << 16) + + (SkTPin(slant, kUpright_Slant, kOblique_Slant) << 24) + ) { } + + constexpr SkFontStyle() : SkFontStyle{kNormal_Weight, kNormal_Width, kUpright_Slant} { } + + bool operator==(const SkFontStyle& rhs) const { + return fValue == rhs.fValue; + } + + int weight() const { return fValue & 0xFFFF; } + int width() const { return (fValue >> 16) & 0xFF; } + Slant slant() const { return (Slant)((fValue >> 24) & 0xFF); } + + static constexpr SkFontStyle Normal() { + return SkFontStyle(kNormal_Weight, kNormal_Width, kUpright_Slant); + } + static constexpr SkFontStyle Bold() { + return SkFontStyle(kBold_Weight, kNormal_Width, kUpright_Slant); + } + static constexpr SkFontStyle Italic() { + return SkFontStyle(kNormal_Weight, kNormal_Width, kItalic_Slant ); + } + static constexpr SkFontStyle BoldItalic() { + return SkFontStyle(kBold_Weight, kNormal_Width, kItalic_Slant ); + } + +private: + friend class SkTypefaceProxyPrototype; // To serialize fValue + int32_t fValue; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkFontTypes.h b/gfx/skia/skia/include/core/SkFontTypes.h new file mode 100644 index 0000000000..76f5dde67f --- /dev/null +++ b/gfx/skia/skia/include/core/SkFontTypes.h @@ -0,0 +1,25 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontTypes_DEFINED +#define SkFontTypes_DEFINED + +enum class SkTextEncoding { + kUTF8, //!< uses bytes to represent UTF-8 or ASCII + kUTF16, //!< uses two byte words to represent most of Unicode + kUTF32, //!< uses four byte words to represent all of Unicode + kGlyphID, //!< uses two byte words to represent glyph indices +}; + +enum class SkFontHinting { + kNone, //!< glyph outlines unchanged + kSlight, //!< minimal modification to improve constrast + kNormal, //!< glyph outlines modified to improve constrast + kFull, //!< modifies glyph outlines for maximum constrast +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkGraphics.h b/gfx/skia/skia/include/core/SkGraphics.h new file mode 100644 index 0000000000..2a20825046 --- /dev/null +++ b/gfx/skia/skia/include/core/SkGraphics.h @@ -0,0 +1,169 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGraphics_DEFINED +#define SkGraphics_DEFINED + +#include "include/core/SkRefCnt.h" + +#include + +class SkData; +class SkImageGenerator; +class SkOpenTypeSVGDecoder; +class SkPath; +class SkTraceMemoryDump; + +class SK_API SkGraphics { +public: + /** + * Call this at process initialization time if your environment does not + * permit static global initializers that execute code. + * Init() is thread-safe and idempotent. + */ + static void Init(); + + /** + * Return the max number of bytes that should be used by the font cache. + * If the cache needs to allocate more, it will purge previous entries. + * This max can be changed by calling SetFontCacheLimit(). + */ + static size_t GetFontCacheLimit(); + + /** + * Specify the max number of bytes that should be used by the font cache. + * If the cache needs to allocate more, it will purge previous entries. + * + * This function returns the previous setting, as if GetFontCacheLimit() + * had be called before the new limit was set. + */ + static size_t SetFontCacheLimit(size_t bytes); + + /** + * Return the number of bytes currently used by the font cache. + */ + static size_t GetFontCacheUsed(); + + /** + * Return the number of entries in the font cache. + * A cache "entry" is associated with each typeface + pointSize + matrix. + */ + static int GetFontCacheCountUsed(); + + /** + * Return the current limit to the number of entries in the font cache. + * A cache "entry" is associated with each typeface + pointSize + matrix. + */ + static int GetFontCacheCountLimit(); + + /** + * Set the limit to the number of entries in the font cache, and return + * the previous value. If this new value is lower than the previous, + * it will automatically try to purge entries to meet the new limit. + */ + static int SetFontCacheCountLimit(int count); + + /** + * For debugging purposes, this will attempt to purge the font cache. It + * does not change the limit, but will cause subsequent font measures and + * draws to be recreated, since they will no longer be in the cache. + */ + static void PurgeFontCache(); + + /** + * This function returns the memory used for temporary images and other resources. + */ + static size_t GetResourceCacheTotalBytesUsed(); + + /** + * These functions get/set the memory usage limit for the resource cache, used for temporary + * bitmaps and other resources. Entries are purged from the cache when the memory useage + * exceeds this limit. + */ + static size_t GetResourceCacheTotalByteLimit(); + static size_t SetResourceCacheTotalByteLimit(size_t newLimit); + + /** + * For debugging purposes, this will attempt to purge the resource cache. It + * does not change the limit. + */ + static void PurgeResourceCache(); + + /** + * When the cachable entry is very lage (e.g. a large scaled bitmap), adding it to the cache + * can cause most/all of the existing entries to be purged. To avoid the, the client can set + * a limit for a single allocation. If a cacheable entry would have been cached, but its size + * exceeds this limit, then we do not attempt to cache it at all. + * + * Zero is the default value, meaning we always attempt to cache entries. + */ + static size_t GetResourceCacheSingleAllocationByteLimit(); + static size_t SetResourceCacheSingleAllocationByteLimit(size_t newLimit); + + /** + * Dumps memory usage of caches using the SkTraceMemoryDump interface. See SkTraceMemoryDump + * for usage of this method. + */ + static void DumpMemoryStatistics(SkTraceMemoryDump* dump); + + /** + * Free as much globally cached memory as possible. This will purge all private caches in Skia, + * including font and image caches. + * + * If there are caches associated with GPU context, those will not be affected by this call. + */ + static void PurgeAllCaches(); + + typedef std::unique_ptr + (*ImageGeneratorFromEncodedDataFactory)(sk_sp); + + /** + * To instantiate images from encoded data, first looks at this runtime function-ptr. If it + * exists, it is called to create an SkImageGenerator from SkData. If there is no function-ptr + * or there is, but it returns NULL, then skia will call its internal default implementation. + * + * Returns the previous factory (which could be NULL). + */ + static ImageGeneratorFromEncodedDataFactory + SetImageGeneratorFromEncodedDataFactory(ImageGeneratorFromEncodedDataFactory); + + /** + * To draw OpenType SVG data, Skia will look at this runtime function pointer. If this function + * pointer is set, the SkTypeface implementations which support OpenType SVG will call this + * function to create an SkOpenTypeSVGDecoder to decode the OpenType SVG and draw it as needed. + * If this function is not set, the SkTypeface implementations will generally not support + * OpenType SVG and attempt to use other glyph representations if available. + */ + using OpenTypeSVGDecoderFactory = + std::unique_ptr (*)(const uint8_t* svg, size_t length); + static OpenTypeSVGDecoderFactory SetOpenTypeSVGDecoderFactory(OpenTypeSVGDecoderFactory); + static OpenTypeSVGDecoderFactory GetOpenTypeSVGDecoderFactory(); + + /** + * Call early in main() to allow Skia to use a JIT to accelerate CPU-bound operations. + */ + static void AllowJIT(); + + /** + * To override the default AA algorithm choice in the CPU backend, provide a function that + * returns whether to use analytic (true) or supersampled (false) for a given path. + * + * NOTE: This is a temporary API, intended for migration of all clients to one algorithm, + * and should not be used. + */ + typedef bool (*PathAnalyticAADeciderProc)(const SkPath&); + static void SetPathAnalyticAADecider(PathAnalyticAADeciderProc); +}; + +class SkAutoGraphics { +public: + SkAutoGraphics() { + SkGraphics::Init(); + } +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkICC.h b/gfx/skia/skia/include/core/SkICC.h new file mode 100644 index 0000000000..c0b458100c --- /dev/null +++ b/gfx/skia/skia/include/core/SkICC.h @@ -0,0 +1,9 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// TODO(kjlubick) remove this shim after clients have been moved to the new location +#include "include/encode/SkICC.h" // IWYU pragma: export diff --git a/gfx/skia/skia/include/core/SkImage.h b/gfx/skia/skia/include/core/SkImage.h new file mode 100644 index 0000000000..c7311ae1b6 --- /dev/null +++ b/gfx/skia/skia/include/core/SkImage.h @@ -0,0 +1,1575 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImage_DEFINED +#define SkImage_DEFINED + +#include "include/core/SkAlphaType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrTypes.h" +#endif +#if defined(SK_GRAPHITE) +#include "include/gpu/graphite/GraphiteTypes.h" +#endif + +#include +#include +#include +#include +#include + +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 +#include "include/gpu/GrTypes.h" +#include +#endif + +// TODO(kjlubick) remove when Chrome has been migrated +#include "include/core/SkTextureCompressionType.h" + +class GrBackendFormat; +class GrBackendTexture; +class GrContextThreadSafeProxy; +class GrDirectContext; +class GrRecordingContext; +class GrYUVABackendTextureInfo; +class GrYUVABackendTextures; +class SkBitmap; +class SkColorSpace; +class SkData; +class SkImageFilter; +class SkImageGenerator; +class SkMatrix; +class SkMipmap; +class SkPaint; +class SkPicture; +class SkPixmap; +class SkPromiseImageTexture; +class SkShader; +class SkSurfaceProps; +class SkYUVAPixmaps; +enum SkColorType : int; +enum class SkEncodedImageFormat; +enum class SkTileMode; +struct SkIPoint; +struct SkSamplingOptions; + +#if defined(SK_GRAPHITE) +namespace skgpu::graphite { +class BackendTexture; +class Recorder; +class TextureInfo; +enum class Volatile : bool; +class YUVABackendTextures; +} +#endif + +/** \class SkImage + SkImage describes a two dimensional array of pixels to draw. The pixels may be + decoded in a raster bitmap, encoded in a SkPicture or compressed data stream, + or located in GPU memory as a GPU texture. + + SkImage cannot be modified after it is created. SkImage may allocate additional + storage as needed; for instance, an encoded SkImage may decode when drawn. + + SkImage width and height are greater than zero. Creating an SkImage with zero width + or height returns SkImage equal to nullptr. + + SkImage may be created from SkBitmap, SkPixmap, SkSurface, SkPicture, encoded streams, + GPU texture, YUV_ColorSpace data, or hardware buffer. Encoded streams supported + include BMP, GIF, HEIF, ICO, JPEG, PNG, WBMP, WebP. Supported encoding details + vary with platform. +*/ +class SK_API SkImage : public SkRefCnt { +public: + + /** Caller data passed to RasterReleaseProc; may be nullptr. + */ + typedef void* ReleaseContext; + + /** Creates SkImage from SkPixmap and copy of pixels. Since pixels are copied, SkPixmap + pixels may be modified or deleted without affecting SkImage. + + SkImage is returned if SkPixmap is valid. Valid SkPixmap parameters include: + dimensions are greater than zero; + each dimension fits in 29 bits; + SkColorType and SkAlphaType are valid, and SkColorType is not kUnknown_SkColorType; + row bytes are large enough to hold one row of pixels; + pixel address is not nullptr. + + @param pixmap SkImageInfo, pixel address, and row bytes + @return copy of SkPixmap pixels, or nullptr + + example: https://fiddle.skia.org/c/@Image_MakeRasterCopy + */ + static sk_sp MakeRasterCopy(const SkPixmap& pixmap); + + /** Creates SkImage from SkImageInfo, sharing pixels. + + SkImage is returned if SkImageInfo is valid. Valid SkImageInfo parameters include: + dimensions are greater than zero; + each dimension fits in 29 bits; + SkColorType and SkAlphaType are valid, and SkColorType is not kUnknown_SkColorType; + rowBytes are large enough to hold one row of pixels; + pixels is not nullptr, and contains enough data for SkImage. + + @param info contains width, height, SkAlphaType, SkColorType, SkColorSpace + @param pixels address or pixel storage + @param rowBytes size of pixel row or larger + @return SkImage sharing pixels, or nullptr + */ + static sk_sp MakeRasterData(const SkImageInfo& info, sk_sp pixels, + size_t rowBytes); + + /** Function called when SkImage no longer shares pixels. ReleaseContext is + provided by caller when SkImage is created, and may be nullptr. + */ + typedef void (*RasterReleaseProc)(const void* pixels, ReleaseContext); + + /** Creates SkImage from pixmap, sharing SkPixmap pixels. Pixels must remain valid and + unchanged until rasterReleaseProc is called. rasterReleaseProc is passed + releaseContext when SkImage is deleted or no longer refers to pixmap pixels. + + Pass nullptr for rasterReleaseProc to share SkPixmap without requiring a callback + when SkImage is released. Pass nullptr for releaseContext if rasterReleaseProc + does not require state. + + SkImage is returned if pixmap is valid. Valid SkPixmap parameters include: + dimensions are greater than zero; + each dimension fits in 29 bits; + SkColorType and SkAlphaType are valid, and SkColorType is not kUnknown_SkColorType; + row bytes are large enough to hold one row of pixels; + pixel address is not nullptr. + + @param pixmap SkImageInfo, pixel address, and row bytes + @param rasterReleaseProc function called when pixels can be released; or nullptr + @param releaseContext state passed to rasterReleaseProc; or nullptr + @return SkImage sharing pixmap + */ + static sk_sp MakeFromRaster(const SkPixmap& pixmap, + RasterReleaseProc rasterReleaseProc, + ReleaseContext releaseContext); + + /** Creates SkImage from bitmap, sharing or copying bitmap pixels. If the bitmap + is marked immutable, and its pixel memory is shareable, it may be shared + instead of copied. + + SkImage is returned if bitmap is valid. Valid SkBitmap parameters include: + dimensions are greater than zero; + each dimension fits in 29 bits; + SkColorType and SkAlphaType are valid, and SkColorType is not kUnknown_SkColorType; + row bytes are large enough to hold one row of pixels; + pixel address is not nullptr. + + @param bitmap SkImageInfo, row bytes, and pixels + @return created SkImage, or nullptr + + example: https://fiddle.skia.org/c/@Image_MakeFromBitmap + */ + static sk_sp MakeFromBitmap(const SkBitmap& bitmap); + + /** Creates SkImage from data returned by imageGenerator. Generated data is owned by SkImage and + may not be shared or accessed. + + SkImage is returned if generator data is valid. Valid data parameters vary by type of data + and platform. + + imageGenerator may wrap SkPicture data, codec data, or custom data. + + @param imageGenerator stock or custom routines to retrieve SkImage + @return created SkImage, or nullptr + */ + static sk_sp MakeFromGenerator(std::unique_ptr imageGenerator); + + /** + * Return an image backed by the encoded data, but attempt to defer decoding until the image + * is actually used/drawn. This deferral allows the system to cache the result, either on the + * CPU or on the GPU, depending on where the image is drawn. If memory is low, the cache may + * be purged, causing the next draw of the image to have to re-decode. + * + * If alphaType is nullopt, the image's alpha type will be chosen automatically based on the + * image format. Transparent images will default to kPremul_SkAlphaType. If alphaType contains + * kPremul_SkAlphaType or kUnpremul_SkAlphaType, that alpha type will be used. Forcing opaque + * (passing kOpaque_SkAlphaType) is not allowed, and will return nullptr. + * + * This is similar to DecodeTo[Raster,Texture], but this method will attempt to defer the + * actual decode, while the DecodeTo... method explicitly decode and allocate the backend + * when the call is made. + * + * If the encoded format is not supported, nullptr is returned. + * + * @param encoded the encoded data + * @return created SkImage, or nullptr + + example: https://fiddle.skia.org/c/@Image_MakeFromEncoded + */ + static sk_sp MakeFromEncoded(sk_sp encoded, + std::optional alphaType = std::nullopt); + + // TODO(kjlubick) remove this once Chrome has been migrated to new type + static const SkTextureCompressionType kETC1_CompressionType = + SkTextureCompressionType::kETC1_RGB8; + + /** Creates a CPU-backed SkImage from compressed data. + + This method will decompress the compressed data and create an image wrapping + it. Any mipmap levels present in the compressed data are discarded. + + @param data compressed data to store in SkImage + @param width width of full SkImage + @param height height of full SkImage + @param type type of compression used + @return created SkImage, or nullptr + */ + static sk_sp MakeRasterFromCompressed(sk_sp data, + int width, int height, + SkTextureCompressionType type); + + enum class BitDepth { + kU8, //!< uses 8-bit unsigned int per color component + kF16, //!< uses 16-bit float per color component + }; + + /** Creates SkImage from picture. Returned SkImage width and height are set by dimensions. + SkImage draws picture with matrix and paint, set to bitDepth and colorSpace. + + If matrix is nullptr, draws with identity SkMatrix. If paint is nullptr, draws + with default SkPaint. colorSpace may be nullptr. + + @param picture stream of drawing commands + @param dimensions width and height + @param matrix SkMatrix to rotate, scale, translate, and so on; may be nullptr + @param paint SkPaint to apply transparency, filtering, and so on; may be nullptr + @param bitDepth 8-bit integer or 16-bit float: per component + @param colorSpace range of colors; may be nullptr + @param props props to use when rasterizing the picture + @return created SkImage, or nullptr + */ + static sk_sp MakeFromPicture(sk_sp picture, const SkISize& dimensions, + const SkMatrix* matrix, const SkPaint* paint, + BitDepth bitDepth, sk_sp colorSpace, + SkSurfaceProps props); + static sk_sp MakeFromPicture(sk_sp picture, const SkISize& dimensions, + const SkMatrix* matrix, const SkPaint* paint, + BitDepth bitDepth, sk_sp colorSpace); + +#if defined(SK_GANESH) || defined(SK_GRAPHITE) + /** User function called when supplied texture may be deleted. + */ + typedef void (*TextureReleaseProc)(ReleaseContext releaseContext); +#endif + +#if defined(SK_GANESH) + /** Creates a GPU-backed SkImage from compressed data. + + This method will return an SkImage representing the compressed data. + If the GPU doesn't support the specified compression method, the data + will be decompressed and then wrapped in a GPU-backed image. + + Note: one can query the supported compression formats via + GrRecordingContext::compressedBackendFormat. + + @param context GPU context + @param data compressed data to store in SkImage + @param width width of full SkImage + @param height height of full SkImage + @param type type of compression used + @param mipmapped does 'data' contain data for all the mipmap levels? + @param isProtected do the contents of 'data' require DRM protection (on Vulkan)? + @return created SkImage, or nullptr + */ + static sk_sp MakeTextureFromCompressed(GrDirectContext* direct, + sk_sp data, + int width, int height, + SkTextureCompressionType type, + GrMipmapped mipmapped = GrMipmapped::kNo, + GrProtected isProtected = GrProtected::kNo); + + /** Creates SkImage from GPU texture associated with context. GPU texture must stay + valid and unchanged until textureReleaseProc is called. textureReleaseProc is + passed releaseContext when SkImage is deleted or no longer refers to texture. + + SkImage is returned if format of backendTexture is recognized and supported. + Recognized formats vary by GPU back-end. + + @note When using a DDL recording context, textureReleaseProc will be called on the + GPU thread after the DDL is played back on the direct context. + + @param context GPU context + @param backendTexture Gexture residing on GPU + @param origin Origin of backendTexture + @param colorType Color type of the resulting image + @param alphaType Alpha type of the resulting image + @param colorSpace This describes the color space of this image's contents, as + seen after sampling. In general, if the format of the backend + texture is SRGB, some linear colorSpace should be supplied + (e.g., SkColorSpace::MakeSRGBLinear()). If the format of the + backend texture is linear, then the colorSpace should include + a description of the transfer function as + well (e.g., SkColorSpace::MakeSRGB()). + @param textureReleaseProc Function called when texture can be released + @param releaseContext State passed to textureReleaseProc + @return Created SkImage, or nullptr + */ + static sk_sp MakeFromTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin origin, + SkColorType colorType, + SkAlphaType alphaType, + sk_sp colorSpace, + TextureReleaseProc textureReleaseProc = nullptr, + ReleaseContext releaseContext = nullptr); + + /** Creates an SkImage from a GPU backend texture. The backend texture must stay + valid and unchanged until textureReleaseProc is called. The textureReleaseProc is + called when the SkImage is deleted or no longer refers to the texture and will be + passed the releaseContext. + + An SkImage is returned if the format of backendTexture is recognized and supported. + Recognized formats vary by GPU back-end. + + @note When using a DDL recording context, textureReleaseProc will be called on the + GPU thread after the DDL is played back on the direct context. + + @param context The GPU context + @param backendTexture A texture already allocated by the GPU + @param origin Origin of backendTexture + @param alphaType This characterizes the nature of the alpha values in the + backend texture. For opaque compressed formats (e.g., ETC1) + this should usually be set to kOpaque_SkAlphaType. + @param colorSpace This describes the color space of this image's contents, as + seen after sampling. In general, if the format of the backend + texture is SRGB, some linear colorSpace should be supplied + (e.g., SkColorSpace::MakeSRGBLinear()). If the format of the + backend texture is linear, then the colorSpace should include + a description of the transfer function as + well (e.g., SkColorSpace::MakeSRGB()). + @param textureReleaseProc Function called when the backend texture can be released + @param releaseContext State passed to textureReleaseProc + @return Created SkImage, or nullptr + */ + static sk_sp MakeFromCompressedTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin origin, + SkAlphaType alphaType, + sk_sp colorSpace, + TextureReleaseProc textureReleaseProc = nullptr, + ReleaseContext releaseContext = nullptr); + + /** Creates SkImage from pixmap. SkImage is uploaded to GPU back-end using context. + + Created SkImage is available to other GPU contexts, and is available across thread + boundaries. All contexts must be in the same GPU share group, or otherwise + share resources. + + When SkImage is no longer referenced, context releases texture memory + asynchronously. + + SkColorSpace of SkImage is determined by pixmap.colorSpace(). + + SkImage is returned referring to GPU back-end if context is not nullptr, + format of data is recognized and supported, and if context supports moving + resources between contexts. Otherwise, pixmap pixel data is copied and SkImage + as returned in raster format if possible; nullptr may be returned. + Recognized GPU formats vary by platform and GPU back-end. + + @param context GPU context + @param pixmap SkImageInfo, pixel address, and row bytes + @param buildMips create SkImage as mip map if true + @param limitToMaxTextureSize downscale image to GPU maximum texture size, if necessary + @return created SkImage, or nullptr + */ + static sk_sp MakeCrossContextFromPixmap(GrDirectContext* context, + const SkPixmap& pixmap, + bool buildMips, + bool limitToMaxTextureSize = false); + + /** Creates SkImage from backendTexture associated with context. backendTexture and + returned SkImage are managed internally, and are released when no longer needed. + + SkImage is returned if format of backendTexture is recognized and supported. + Recognized formats vary by GPU back-end. + + @param context GPU context + @param backendTexture texture residing on GPU + @param textureOrigin origin of backendTexture + @param colorType color type of the resulting image + @param alphaType alpha type of the resulting image + @param colorSpace range of colors; may be nullptr + @return created SkImage, or nullptr + */ + static sk_sp MakeFromAdoptedTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin textureOrigin, + SkColorType colorType); + static sk_sp MakeFromAdoptedTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin textureOrigin, + SkColorType colorType, + SkAlphaType alphaType); + static sk_sp MakeFromAdoptedTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin textureOrigin, + SkColorType colorType, + SkAlphaType alphaType, + sk_sp colorSpace); + + /** Creates an SkImage from YUV[A] planar textures. This requires that the textures stay valid + for the lifetime of the image. The ReleaseContext can be used to know when it is safe to + either delete or overwrite the textures. If ReleaseProc is provided it is also called before + return on failure. + + @param context GPU context + @param yuvaTextures A set of textures containing YUVA data and a description of the + data and transformation to RGBA. + @param imageColorSpace range of colors of the resulting image after conversion to RGB; + may be nullptr + @param textureReleaseProc called when the backend textures can be released + @param releaseContext state passed to textureReleaseProc + @return created SkImage, or nullptr + */ + static sk_sp MakeFromYUVATextures(GrRecordingContext* context, + const GrYUVABackendTextures& yuvaTextures, + sk_sp imageColorSpace, + TextureReleaseProc textureReleaseProc = nullptr, + ReleaseContext releaseContext = nullptr); + static sk_sp MakeFromYUVATextures(GrRecordingContext* context, + const GrYUVABackendTextures& yuvaTextures); + + /** Creates SkImage from SkYUVAPixmaps. + + The image will remain planar with each plane converted to a texture using the passed + GrRecordingContext. + + SkYUVAPixmaps has a SkYUVAInfo which specifies the transformation from YUV to RGB. + The SkColorSpace of the resulting RGB values is specified by imageColorSpace. This will + be the SkColorSpace reported by the image and when drawn the RGB values will be converted + from this space into the destination space (if the destination is tagged). + + Currently, this is only supported using the GPU backend and will fail if context is nullptr. + + SkYUVAPixmaps does not need to remain valid after this returns. + + @param context GPU context + @param pixmaps The planes as pixmaps with supported SkYUVAInfo that + specifies conversion to RGB. + @param buildMips create internal YUVA textures as mip map if kYes. This is + silently ignored if the context does not support mip maps. + @param limitToMaxTextureSize downscale image to GPU maximum texture size, if necessary + @param imageColorSpace range of colors of the resulting image; may be nullptr + @return created SkImage, or nullptr + */ + static sk_sp MakeFromYUVAPixmaps(GrRecordingContext* context, + const SkYUVAPixmaps& pixmaps, + GrMipmapped buildMips, + bool limitToMaxTextureSize, + sk_sp imageColorSpace); + static sk_sp MakeFromYUVAPixmaps(GrRecordingContext* context, + const SkYUVAPixmaps& pixmaps, + GrMipmapped buildMips = GrMipmapped::kNo, + bool limitToMaxTextureSize = false); + + using PromiseImageTextureContext = void*; + using PromiseImageTextureFulfillProc = + sk_sp (*)(PromiseImageTextureContext); + using PromiseImageTextureReleaseProc = void (*)(PromiseImageTextureContext); + + /** Create a new SkImage that is very similar to an SkImage created by MakeFromTexture. The + difference is that the caller need not have created the texture nor populated it with the + image pixel data. Moreover, the SkImage may be created on a thread as the creation of the + image does not require access to the backend API or GrDirectContext. Instead of passing a + GrBackendTexture the client supplies a description of the texture consisting of + GrBackendFormat, width, height, and GrMipmapped state. The resulting SkImage can be drawn + to a SkDeferredDisplayListRecorder or directly to a GPU-backed SkSurface. + + When the actual texture is required to perform a backend API draw, textureFulfillProc will + be called to receive a GrBackendTexture. The properties of the GrBackendTexture must match + those set during the SkImage creation, and it must refer to a valid existing texture in the + backend API context/device, and be populated with the image pixel data. The texture cannot + be deleted until textureReleaseProc is called. + + There is at most one call to each of textureFulfillProc and textureReleaseProc. + textureReleaseProc is always called even if image creation fails or if the + image is never fulfilled (e.g. it is never drawn or all draws are clipped out) + + @param gpuContextProxy the thread-safe proxy of the gpu context. required. + @param backendFormat format of promised gpu texture + @param dimensions width & height of promised gpu texture + @param mipmapped mip mapped state of promised gpu texture + @param origin surface origin of promised gpu texture + @param colorType color type of promised gpu texture + @param alphaType alpha type of promised gpu texture + @param colorSpace range of colors; may be nullptr + @param textureFulfillProc function called to get actual gpu texture + @param textureReleaseProc function called when texture can be deleted + @param textureContext state passed to textureFulfillProc and textureReleaseProc + @return created SkImage, or nullptr + */ + static sk_sp MakePromiseTexture(sk_sp gpuContextProxy, + const GrBackendFormat& backendFormat, + SkISize dimensions, + GrMipmapped mipmapped, + GrSurfaceOrigin origin, + SkColorType colorType, + SkAlphaType alphaType, + sk_sp colorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContext); + + /** This entry point operates like 'MakePromiseTexture' but it is used to construct a SkImage + from YUV[A] data. The source data may be planar (i.e. spread across multiple textures). In + the extreme Y, U, V, and A are all in different planes and thus the image is specified by + four textures. 'backendTextureInfo' describes the planar arrangement, texture formats, + conversion to RGB, and origin of the textures. Separate 'textureFulfillProc' and + 'textureReleaseProc' calls are made for each texture. Each texture has its own + PromiseImageTextureContext. If 'backendTextureInfo' is not valid then no release proc + calls are made. Otherwise, the calls will be made even on failure. 'textureContexts' has one + entry for each of the up to four textures, as indicated by 'backendTextureInfo'. + + Currently the mip mapped property of 'backendTextureInfo' is ignored. However, in the + near future it will be required that if it is kYes then textureFulfillProc must return + a mip mapped texture for each plane in order to successfully draw the image. + + @param gpuContextProxy the thread-safe proxy of the gpu context. required. + @param backendTextureInfo info about the promised yuva gpu texture + @param imageColorSpace range of colors; may be nullptr + @param textureFulfillProc function called to get actual gpu texture + @param textureReleaseProc function called when texture can be deleted + @param textureContexts state passed to textureFulfillProc and textureReleaseProc + @return created SkImage, or nullptr + */ + static sk_sp MakePromiseYUVATexture(sk_sp gpuContextProxy, + const GrYUVABackendTextureInfo& backendTextureInfo, + sk_sp imageColorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContexts[]); + +#endif // defined(SK_GANESH) + + /** Returns a SkImageInfo describing the width, height, color type, alpha type, and color space + of the SkImage. + + @return image info of SkImage. + */ + const SkImageInfo& imageInfo() const { return fInfo; } + + /** Returns pixel count in each row. + + @return pixel width in SkImage + */ + int width() const { return fInfo.width(); } + + /** Returns pixel row count. + + @return pixel height in SkImage + */ + int height() const { return fInfo.height(); } + + /** Returns SkISize { width(), height() }. + + @return integral size of width() and height() + */ + SkISize dimensions() const { return SkISize::Make(fInfo.width(), fInfo.height()); } + + /** Returns SkIRect { 0, 0, width(), height() }. + + @return integral rectangle from origin to width() and height() + */ + SkIRect bounds() const { return SkIRect::MakeWH(fInfo.width(), fInfo.height()); } + + /** Returns value unique to image. SkImage contents cannot change after SkImage is + created. Any operation to create a new SkImage will receive generate a new + unique number. + + @return unique identifier + */ + uint32_t uniqueID() const { return fUniqueID; } + + /** Returns SkAlphaType. + + SkAlphaType returned was a parameter to an SkImage constructor, + or was parsed from encoded data. + + @return SkAlphaType in SkImage + + example: https://fiddle.skia.org/c/@Image_alphaType + */ + SkAlphaType alphaType() const; + + /** Returns SkColorType if known; otherwise, returns kUnknown_SkColorType. + + @return SkColorType of SkImage + + example: https://fiddle.skia.org/c/@Image_colorType + */ + SkColorType colorType() const; + + /** Returns SkColorSpace, the range of colors, associated with SkImage. The + reference count of SkColorSpace is unchanged. The returned SkColorSpace is + immutable. + + SkColorSpace returned was passed to an SkImage constructor, + or was parsed from encoded data. SkColorSpace returned may be ignored when SkImage + is drawn, depending on the capabilities of the SkSurface receiving the drawing. + + @return SkColorSpace in SkImage, or nullptr + + example: https://fiddle.skia.org/c/@Image_colorSpace + */ + SkColorSpace* colorSpace() const; + + /** Returns a smart pointer to SkColorSpace, the range of colors, associated with + SkImage. The smart pointer tracks the number of objects sharing this + SkColorSpace reference so the memory is released when the owners destruct. + + The returned SkColorSpace is immutable. + + SkColorSpace returned was passed to an SkImage constructor, + or was parsed from encoded data. SkColorSpace returned may be ignored when SkImage + is drawn, depending on the capabilities of the SkSurface receiving the drawing. + + @return SkColorSpace in SkImage, or nullptr, wrapped in a smart pointer + + example: https://fiddle.skia.org/c/@Image_refColorSpace + */ + sk_sp refColorSpace() const; + + /** Returns true if SkImage pixels represent transparency only. If true, each pixel + is packed in 8 bits as defined by kAlpha_8_SkColorType. + + @return true if pixels represent a transparency mask + + example: https://fiddle.skia.org/c/@Image_isAlphaOnly + */ + bool isAlphaOnly() const; + + /** Returns true if pixels ignore their alpha value and are treated as fully opaque. + + @return true if SkAlphaType is kOpaque_SkAlphaType + */ + bool isOpaque() const { return SkAlphaTypeIsOpaque(this->alphaType()); } + + /** + * Make a shader with the specified tiling and mipmap sampling. + */ + sk_sp makeShader(SkTileMode tmx, SkTileMode tmy, const SkSamplingOptions&, + const SkMatrix* localMatrix = nullptr) const; + sk_sp makeShader(SkTileMode tmx, SkTileMode tmy, const SkSamplingOptions& sampling, + const SkMatrix& lm) const; + /** Defaults to clamp in both X and Y. */ + sk_sp makeShader(const SkSamplingOptions& sampling, const SkMatrix& lm) const; + sk_sp makeShader(const SkSamplingOptions& sampling, + const SkMatrix* lm = nullptr) const; + + /** + * makeRawShader functions like makeShader, but for images that contain non-color data. + * This includes images encoding things like normals, material properties (eg, roughness), + * heightmaps, or any other purely mathematical data that happens to be stored in an image. + * These types of images are useful with some programmable shaders (see: SkRuntimeEffect). + * + * Raw image shaders work like regular image shaders (including filtering and tiling), with + * a few major differences: + * - No color space transformation is ever applied (the color space of the image is ignored). + * - Images with an alpha type of kUnpremul are *not* automatically premultiplied. + * - Bicubic filtering is not supported. If SkSamplingOptions::useCubic is true, these + * factories will return nullptr. + */ + sk_sp makeRawShader(SkTileMode tmx, SkTileMode tmy, const SkSamplingOptions&, + const SkMatrix* localMatrix = nullptr) const; + sk_sp makeRawShader(SkTileMode tmx, SkTileMode tmy, const SkSamplingOptions& sampling, + const SkMatrix& lm) const; + /** Defaults to clamp in both X and Y. */ + sk_sp makeRawShader(const SkSamplingOptions& sampling, const SkMatrix& lm) const; + sk_sp makeRawShader(const SkSamplingOptions& sampling, + const SkMatrix* lm = nullptr) const; + + /** Copies SkImage pixel address, row bytes, and SkImageInfo to pixmap, if address + is available, and returns true. If pixel address is not available, return + false and leave pixmap unchanged. + + @param pixmap storage for pixel state if pixels are readable; otherwise, ignored + @return true if SkImage has direct access to pixels + + example: https://fiddle.skia.org/c/@Image_peekPixels + */ + bool peekPixels(SkPixmap* pixmap) const; + + /** Returns true if the contents of SkImage was created on or uploaded to GPU memory, + and is available as a GPU texture. + + @return true if SkImage is a GPU texture + + example: https://fiddle.skia.org/c/@Image_isTextureBacked + */ + bool isTextureBacked() const; + + /** Returns an approximation of the amount of texture memory used by the image. Returns + zero if the image is not texture backed or if the texture has an external format. + */ + size_t textureSize() const; + + /** Returns true if SkImage can be drawn on either raster surface or GPU surface. + If context is nullptr, tests if SkImage draws on raster surface; + otherwise, tests if SkImage draws on GPU surface associated with context. + + SkImage backed by GPU texture may become invalid if associated context is + invalid. lazy image may be invalid and may not draw to raster surface or + GPU surface or both. + + @param context GPU context + @return true if SkImage can be drawn + + example: https://fiddle.skia.org/c/@Image_isValid + */ + bool isValid(GrRecordingContext* context) const; + +#if defined(SK_GANESH) + /** Flushes any pending uses of texture-backed images in the GPU backend. If the image is not + texture-backed (including promise texture images) or if the GrDirectContext does not + have the same context ID as the context backing the image then this is a no-op. + + If the image was not used in any non-culled draws in the current queue of work for the + passed GrDirectContext then this is a no-op unless the GrFlushInfo contains semaphores or + a finish proc. Those are respected even when the image has not been used. + + @param context the context on which to flush pending usages of the image. + @param info flush options + */ + GrSemaphoresSubmitted flush(GrDirectContext* context, const GrFlushInfo& flushInfo) const; + + void flush(GrDirectContext* context) const { this->flush(context, {}); } + + /** Version of flush() that uses a default GrFlushInfo. Also submits the flushed work to the + GPU. + */ + void flushAndSubmit(GrDirectContext*) const; + + /** Retrieves the back-end texture. If SkImage has no back-end texture, an invalid + object is returned. Call GrBackendTexture::isValid to determine if the result + is valid. + + If flushPendingGrContextIO is true, completes deferred I/O operations. + + If origin in not nullptr, copies location of content drawn into SkImage. + + @param flushPendingGrContextIO flag to flush outstanding requests + @return back-end API texture handle; invalid on failure + */ + GrBackendTexture getBackendTexture(bool flushPendingGrContextIO, + GrSurfaceOrigin* origin = nullptr) const; +#endif // defined(SK_GANESH) + + /** \enum SkImage::CachingHint + CachingHint selects whether Skia may internally cache SkBitmap generated by + decoding SkImage, or by copying SkImage from GPU to CPU. The default behavior + allows caching SkBitmap. + + Choose kDisallow_CachingHint if SkImage pixels are to be used only once, or + if SkImage pixels reside in a cache outside of Skia, or to reduce memory pressure. + + Choosing kAllow_CachingHint does not ensure that pixels will be cached. + SkImage pixels may not be cached if memory requirements are too large or + pixels are not accessible. + */ + enum CachingHint { + kAllow_CachingHint, //!< allows internally caching decoded and copied pixels + kDisallow_CachingHint, //!< disallows internally caching decoded and copied pixels + }; + + /** Copies SkRect of pixels from SkImage to dstPixels. Copy starts at offset (srcX, srcY), + and does not exceed SkImage (width(), height()). + + dstInfo specifies width, height, SkColorType, SkAlphaType, and SkColorSpace of + destination. dstRowBytes specifies the gap from one destination row to the next. + Returns true if pixels are copied. Returns false if: + - dstInfo.addr() equals nullptr + - dstRowBytes is less than dstInfo.minRowBytes() + - SkPixelRef is nullptr + + Pixels are copied only if pixel conversion is possible. If SkImage SkColorType is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dstInfo.colorType() must match. + If SkImage SkColorType is kGray_8_SkColorType, dstInfo.colorSpace() must match. + If SkImage SkAlphaType is kOpaque_SkAlphaType, dstInfo.alphaType() must + match. If SkImage SkColorSpace is nullptr, dstInfo.colorSpace() must match. Returns + false if pixel conversion is not possible. + + srcX and srcY may be negative to copy only top or left of source. Returns + false if width() or height() is zero or negative. + Returns false if abs(srcX) >= Image width(), or if abs(srcY) >= Image height(). + + If cachingHint is kAllow_CachingHint, pixels may be retained locally. + If cachingHint is kDisallow_CachingHint, pixels are not added to the local cache. + + @param context the GrDirectContext in play, if it exists + @param dstInfo destination width, height, SkColorType, SkAlphaType, SkColorSpace + @param dstPixels destination pixel storage + @param dstRowBytes destination row length + @param srcX column index whose absolute value is less than width() + @param srcY row index whose absolute value is less than height() + @param cachingHint whether the pixels should be cached locally + @return true if pixels are copied to dstPixels + */ + bool readPixels(GrDirectContext* context, + const SkImageInfo& dstInfo, + void* dstPixels, + size_t dstRowBytes, + int srcX, int srcY, + CachingHint cachingHint = kAllow_CachingHint) const; + + /** Copies a SkRect of pixels from SkImage to dst. Copy starts at (srcX, srcY), and + does not exceed SkImage (width(), height()). + + dst specifies width, height, SkColorType, SkAlphaType, SkColorSpace, pixel storage, + and row bytes of destination. dst.rowBytes() specifics the gap from one destination + row to the next. Returns true if pixels are copied. Returns false if: + - dst pixel storage equals nullptr + - dst.rowBytes is less than SkImageInfo::minRowBytes + - SkPixelRef is nullptr + + Pixels are copied only if pixel conversion is possible. If SkImage SkColorType is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dst.colorType() must match. + If SkImage SkColorType is kGray_8_SkColorType, dst.colorSpace() must match. + If SkImage SkAlphaType is kOpaque_SkAlphaType, dst.alphaType() must + match. If SkImage SkColorSpace is nullptr, dst.colorSpace() must match. Returns + false if pixel conversion is not possible. + + srcX and srcY may be negative to copy only top or left of source. Returns + false if width() or height() is zero or negative. + Returns false if abs(srcX) >= Image width(), or if abs(srcY) >= Image height(). + + If cachingHint is kAllow_CachingHint, pixels may be retained locally. + If cachingHint is kDisallow_CachingHint, pixels are not added to the local cache. + + @param context the GrDirectContext in play, if it exists + @param dst destination SkPixmap: SkImageInfo, pixels, row bytes + @param srcX column index whose absolute value is less than width() + @param srcY row index whose absolute value is less than height() + @param cachingHint whether the pixels should be cached locallyZ + @return true if pixels are copied to dst + */ + bool readPixels(GrDirectContext* context, + const SkPixmap& dst, + int srcX, + int srcY, + CachingHint cachingHint = kAllow_CachingHint) const; + +#ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API + /** Deprecated. Use the variants that accept a GrDirectContext. */ + bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, + int srcX, int srcY, CachingHint cachingHint = kAllow_CachingHint) const; + bool readPixels(const SkPixmap& dst, int srcX, int srcY, + CachingHint cachingHint = kAllow_CachingHint) const; +#endif + + /** The result from asyncRescaleAndReadPixels() or asyncRescaleAndReadPixelsYUV420(). */ + class AsyncReadResult { + public: + AsyncReadResult(const AsyncReadResult&) = delete; + AsyncReadResult(AsyncReadResult&&) = delete; + AsyncReadResult& operator=(const AsyncReadResult&) = delete; + AsyncReadResult& operator=(AsyncReadResult&&) = delete; + + virtual ~AsyncReadResult() = default; + virtual int count() const = 0; + virtual const void* data(int i) const = 0; + virtual size_t rowBytes(int i) const = 0; + + protected: + AsyncReadResult() = default; + }; + + /** Client-provided context that is passed to client-provided ReadPixelsContext. */ + using ReadPixelsContext = void*; + + /** Client-provided callback to asyncRescaleAndReadPixels() or + asyncRescaleAndReadPixelsYUV420() that is called when read result is ready or on failure. + */ + using ReadPixelsCallback = void(ReadPixelsContext, std::unique_ptr); + + enum class RescaleGamma : bool { kSrc, kLinear }; + + enum class RescaleMode { + kNearest, + kLinear, + kRepeatedLinear, + kRepeatedCubic, + }; + + /** Makes image pixel data available to caller, possibly asynchronously. It can also rescale + the image pixels. + + Currently asynchronous reads are only supported on the GPU backend and only when the + underlying 3D API supports transfer buffers and CPU/GPU synchronization primitives. In all + other cases this operates synchronously. + + Data is read from the source sub-rectangle, is optionally converted to a linear gamma, is + rescaled to the size indicated by 'info', is then converted to the color space, color type, + and alpha type of 'info'. A 'srcRect' that is not contained by the bounds of the image + causes failure. + + When the pixel data is ready the caller's ReadPixelsCallback is called with a + AsyncReadResult containing pixel data in the requested color type, alpha type, and color + space. The AsyncReadResult will have count() == 1. Upon failure the callback is called with + nullptr for AsyncReadResult. For a GPU image this flushes work but a submit must occur to + guarantee a finite time before the callback is called. + + The data is valid for the lifetime of AsyncReadResult with the exception that if the SkImage + is GPU-backed the data is immediately invalidated if the context is abandoned or + destroyed. + + @param info info of the requested pixels + @param srcRect subrectangle of image to read + @param rescaleGamma controls whether rescaling is done in the image's gamma or whether + the source data is transformed to a linear gamma before rescaling. + @param rescaleMode controls the technique (and cost) of the rescaling + @param callback function to call with result of the read + @param context passed to callback + */ + void asyncRescaleAndReadPixels(const SkImageInfo& info, + const SkIRect& srcRect, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const; + + /** + Similar to asyncRescaleAndReadPixels but performs an additional conversion to YUV. The + RGB->YUV conversion is controlled by 'yuvColorSpace'. The YUV data is returned as three + planes ordered y, u, v. The u and v planes are half the width and height of the resized + rectangle. The y, u, and v values are single bytes. Currently this fails if 'dstSize' + width and height are not even. A 'srcRect' that is not contained by the bounds of the + image causes failure. + + When the pixel data is ready the caller's ReadPixelsCallback is called with a + AsyncReadResult containing the planar data. The AsyncReadResult will have count() == 3. + Upon failure the callback is called with nullptr for AsyncReadResult. For a GPU image this + flushes work but a submit must occur to guarantee a finite time before the callback is + called. + + The data is valid for the lifetime of AsyncReadResult with the exception that if the SkImage + is GPU-backed the data is immediately invalidated if the context is abandoned or + destroyed. + + @param yuvColorSpace The transformation from RGB to YUV. Applied to the resized image + after it is converted to dstColorSpace. + @param dstColorSpace The color space to convert the resized image to, after rescaling. + @param srcRect The portion of the image to rescale and convert to YUV planes. + @param dstSize The size to rescale srcRect to + @param rescaleGamma controls whether rescaling is done in the image's gamma or whether + the source data is transformed to a linear gamma before rescaling. + @param rescaleMode controls the technique (and cost) of the rescaling + @param callback function to call with the planar read result + @param context passed to callback + */ + void asyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace, + sk_sp dstColorSpace, + const SkIRect& srcRect, + const SkISize& dstSize, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const; + + /** Copies SkImage to dst, scaling pixels to fit dst.width() and dst.height(), and + converting pixels to match dst.colorType() and dst.alphaType(). Returns true if + pixels are copied. Returns false if dst.addr() is nullptr, or dst.rowBytes() is + less than dst SkImageInfo::minRowBytes. + + Pixels are copied only if pixel conversion is possible. If SkImage SkColorType is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dst.colorType() must match. + If SkImage SkColorType is kGray_8_SkColorType, dst.colorSpace() must match. + If SkImage SkAlphaType is kOpaque_SkAlphaType, dst.alphaType() must + match. If SkImage SkColorSpace is nullptr, dst.colorSpace() must match. Returns + false if pixel conversion is not possible. + + If cachingHint is kAllow_CachingHint, pixels may be retained locally. + If cachingHint is kDisallow_CachingHint, pixels are not added to the local cache. + + @param dst destination SkPixmap: SkImageInfo, pixels, row bytes + @return true if pixels are scaled to fit dst + */ + bool scalePixels(const SkPixmap& dst, const SkSamplingOptions&, + CachingHint cachingHint = kAllow_CachingHint) const; + + /** Encodes SkImage pixels, returning result as SkData. + + Returns nullptr if encoding fails, or if encodedImageFormat is not supported. + + SkImage encoding in a format requires both building with one or more of: + SK_ENCODE_JPEG, SK_ENCODE_PNG, SK_ENCODE_WEBP; and platform support + for the encoded format. + + If SK_BUILD_FOR_MAC or SK_BUILD_FOR_IOS is defined, encodedImageFormat can + additionally be one of: SkEncodedImageFormat::kICO, SkEncodedImageFormat::kBMP, + SkEncodedImageFormat::kGIF. + + quality is a platform and format specific metric trading off size and encoding + error. When used, quality equaling 100 encodes with the least error. quality may + be ignored by the encoder. + + @param context the GrDirectContext in play, if it exists; can be nullptr + @param encodedImageFormat one of: SkEncodedImageFormat::kJPEG, SkEncodedImageFormat::kPNG, + SkEncodedImageFormat::kWEBP + @param quality encoder specific metric with 100 equaling best + @return encoded SkImage, or nullptr + + example: https://fiddle.skia.org/c/@Image_encodeToData + */ + sk_sp encodeToData(GrDirectContext* context, + SkEncodedImageFormat encodedImageFormat, + int quality) const; +#ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API + // Deprecated, use above version instead + sk_sp encodeToData(SkEncodedImageFormat encodedImageFormat, int quality) const; +#endif + + /** Encodes SkImage pixels, returning result as SkData. Returns existing encoded data + if present; otherwise, SkImage is encoded with SkEncodedImageFormat::kPNG. Skia + must be built with SK_ENCODE_PNG to encode SkImage. + + Returns nullptr if existing encoded data is missing or invalid, and + encoding fails. + + @return encoded SkImage, or nullptr + + example: https://fiddle.skia.org/c/@Image_encodeToData_2 + */ + sk_sp encodeToData(GrDirectContext* context) const; +#ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API + // Deprecated, use above version instead + sk_sp encodeToData() const; +#endif + + /** Returns encoded SkImage pixels as SkData, if SkImage was created from supported + encoded stream format. Platform support for formats vary and may require building + with one or more of: SK_ENCODE_JPEG, SK_ENCODE_PNG, SK_ENCODE_WEBP. + + Returns nullptr if SkImage contents are not encoded. + + @return encoded SkImage, or nullptr + + example: https://fiddle.skia.org/c/@Image_refEncodedData + */ + sk_sp refEncodedData() const; + + /** Returns subset of this image. + + Returns nullptr if any of the following are true: + - Subset is empty + - Subset is not contained inside the image's bounds + - Pixels in the image could not be read or copied + + If this image is texture-backed, the context parameter is required and must match the + context of the source image. If the context parameter is provided, and the image is + raster-backed, the subset will be converted to texture-backed. + + @param subset bounds of returned SkImage + @param context the GrDirectContext in play, if it exists + @return the subsetted image, or nullptr + + example: https://fiddle.skia.org/c/@Image_makeSubset + */ + sk_sp makeSubset(const SkIRect& subset, GrDirectContext* direct = nullptr) const; + + /** + * Returns true if the image has mipmap levels. + */ + bool hasMipmaps() const; + + /** + * Returns an image with the same "base" pixels as the this image, but with mipmap levels + * automatically generated and attached. + */ + sk_sp withDefaultMipmaps() const; + +#if defined(SK_GANESH) + /** Returns SkImage backed by GPU texture associated with context. Returned SkImage is + compatible with SkSurface created with dstColorSpace. The returned SkImage respects + mipmapped setting; if mipmapped equals GrMipmapped::kYes, the backing texture + allocates mip map levels. + + The mipmapped parameter is effectively treated as kNo if MIP maps are not supported by the + GPU. + + Returns original SkImage if the image is already texture-backed, the context matches, and + mipmapped is compatible with the backing GPU texture. skgpu::Budgeted is ignored in this + case. + + Returns nullptr if context is nullptr, or if SkImage was created with another + GrDirectContext. + + @param GrDirectContext the GrDirectContext in play, if it exists + @param GrMipmapped whether created SkImage texture must allocate mip map levels + @param skgpu::Budgeted whether to count a newly created texture for the returned image + counts against the context's budget. + @return created SkImage, or nullptr + */ + sk_sp makeTextureImage(GrDirectContext*, + GrMipmapped = GrMipmapped::kNo, + skgpu::Budgeted = skgpu::Budgeted::kYes) const; +#endif // defined(SK_GANESH) + +#if defined(SK_GRAPHITE) + /** Creates an SkImage from a GPU texture associated with the recorder. + + SkImage is returned if the format of backendTexture is recognized and supported. + Recognized formats vary by GPU back-end. + + @param recorder The recorder + @param backendTexture Texture residing on GPU + @param colorType Color type of the resulting image + @param alphaType Alpha type of the resulting image + @param colorSpace This describes the color space of this image's contents, as + seen after sampling. In general, if the format of the backend + texture is SRGB, some linear colorSpace should be supplied + (e.g., SkColorSpace::MakeSRGBLinear()). If the format of the + backend texture is linear, then the colorSpace should include + a description of the transfer function as + well (e.g., SkColorSpace::MakeSRGB()). + @param TextureReleaseProc Function called when the backend texture can be released + @param ReleaseContext State passed to textureReleaseProc + @return Created SkImage, or nullptr + */ + static sk_sp MakeGraphiteFromBackendTexture(skgpu::graphite::Recorder*, + const skgpu::graphite::BackendTexture&, + SkColorType colorType, + SkAlphaType alphaType, + sk_sp colorSpace, + TextureReleaseProc = nullptr, + ReleaseContext = nullptr); + + // Passed to both fulfill and imageRelease + using GraphitePromiseImageContext = void*; + // Returned from fulfill and passed into textureRelease + using GraphitePromiseTextureReleaseContext = void*; + + using GraphitePromiseImageFulfillProc = + std::tuple + (*)(GraphitePromiseImageContext); + using GraphitePromiseImageReleaseProc = void (*)(GraphitePromiseImageContext); + using GraphitePromiseTextureReleaseProc = void (*)(GraphitePromiseTextureReleaseContext); + + /** Create a new SkImage that is very similar to an SkImage created by + MakeGraphiteFromBackendTexture. The difference is that the caller need not have created the + backend texture nor populated it with data when creating the image. Instead of passing a + BackendTexture to the factory the client supplies a description of the texture consisting + of dimensions, TextureInfo, SkColorInfo and Volatility. + + In general, 'fulfill' must return a BackendTexture that matches the properties + provided at SkImage creation time. The BackendTexture must refer to a valid existing + texture in the backend API context/device, and already be populated with data. + The texture cannot be deleted until 'textureRelease' is called. 'textureRelease' will + be called with the textureReleaseContext returned by 'fulfill'. + + Wrt when and how often the fulfill, imageRelease, and textureRelease callbacks will + be called: + + For non-volatile promise images, 'fulfill' will be called at Context::insertRecording + time. Regardless of whether 'fulfill' succeeded or failed, 'imageRelease' will always be + called only once - when Skia will no longer try calling 'fulfill' to get a backend + texture. If 'fulfill' failed (i.e., it didn't return a valid backend texture) then + 'textureRelease' will never be called. If 'fulfill' was successful then + 'textureRelease' will be called only once when the GPU is done with the contents of the + promise image. This will usually occur during a Context::submit call but it could occur + earlier due to error conditions. 'fulfill' can be called multiple times if the promise + image is used in multiple recordings. If 'fulfill' fails, the insertRecording itself will + fail. Subsequent insertRecording calls (with Recordings that use the promise image) will + keep calling 'fulfill' until it succeeds. + + For volatile promise images, 'fulfill' will be called each time the Recording is inserted + into a Context. Regardless of whether 'fulfill' succeeded or failed, 'imageRelease' + will always be called only once just like the non-volatile case. If 'fulfill' fails at + insertRecording-time, 'textureRelease' will never be called. If 'fulfill' was successful + then a 'textureRelease' matching that 'fulfill' will be called when the GPU is done with + the contents of the promise image. This will usually occur during a Context::submit call + but it could occur earlier due to error conditions. + + @param recorder the recorder that will capture the commands creating the image + @param dimensions width & height of promised gpu texture + @param textureInfo structural information for the promised gpu texture + @param colorInfo color type, alpha type and colorSpace information for the image + @param isVolatile volatility of the promise image + @param fulfill function called to get the actual backend texture + @param imageRelease function called when any image-centric data can be deleted + @param textureRelease function called when the backend texture can be deleted + @param imageContext state passed to fulfill and imageRelease + @return created SkImage, or nullptr + */ + static sk_sp MakeGraphitePromiseTexture(skgpu::graphite::Recorder*, + SkISize dimensions, + const skgpu::graphite::TextureInfo&, + const SkColorInfo&, + skgpu::graphite::Volatile, + GraphitePromiseImageFulfillProc, + GraphitePromiseImageReleaseProc, + GraphitePromiseTextureReleaseProc, + GraphitePromiseImageContext); + + /** Creates an SkImage from YUV[A] planar textures associated with the recorder. + + @param recorder The recorder. + @param yuvaBackendTextures A set of textures containing YUVA data and a description of the + data and transformation to RGBA. + @param imageColorSpace range of colors of the resulting image after conversion to RGB; + may be nullptr + @param TextureReleaseProc called when the backend textures can be released + @param ReleaseContext state passed to TextureReleaseProc + @return created SkImage, or nullptr + */ + static sk_sp MakeGraphiteFromYUVABackendTextures( + skgpu::graphite::Recorder* recorder, + const skgpu::graphite::YUVABackendTextures& yuvaBackendTextures, + sk_sp imageColorSpace, + TextureReleaseProc = nullptr, + ReleaseContext = nullptr); + + struct RequiredImageProperties { + skgpu::Mipmapped fMipmapped; + }; + + /** Creates SkImage from SkYUVAPixmaps. + + The image will remain planar with each plane converted to a texture using the passed + Recorder. + + SkYUVAPixmaps has a SkYUVAInfo which specifies the transformation from YUV to RGB. + The SkColorSpace of the resulting RGB values is specified by imgColorSpace. This will + be the SkColorSpace reported by the image and when drawn the RGB values will be converted + from this space into the destination space (if the destination is tagged). + + This is only supported using the GPU backend and will fail if recorder is nullptr. + + SkYUVAPixmaps does not need to remain valid after this returns. + + @param Recorder The Recorder to use for storing commands + @param pixmaps The planes as pixmaps with supported SkYUVAInfo that + specifies conversion to RGB. + @param RequiredImageProperties Properties the returned SkImage must possess (e.g., + mipmaps) + @param limitToMaxTextureSize Downscale image to GPU maximum texture size, if necessary + @param imgColorSpace Range of colors of the resulting image; may be nullptr + @return Created SkImage, or nullptr + */ + static sk_sp MakeGraphiteFromYUVAPixmaps(skgpu::graphite::Recorder*, + const SkYUVAPixmaps& pixmaps, + RequiredImageProperties = {}, + bool limitToMaxTextureSize = false, + sk_sp imgColorSpace = nullptr); + + /** Graphite version of makeTextureImage. + + Returns an SkImage backed by a Graphite texture, using the provided Recorder for creation + and uploads if necessary. The returned SkImage respects the required image properties' + mipmap setting for non-Graphite SkImages; i.e., if mipmapping is required, the backing + Graphite texture will have allocated mip map levels. + + It is assumed that MIP maps are always supported by the GPU. + + Returns original SkImage if the image is already Graphite-backed and the required mipmapping + is compatible with the backing Graphite texture. If the required mipmapping is not + compatible, nullptr will be returned. + + Returns nullptr if no Recorder is provided, or if SkImage was created with another + Recorder and work on that Recorder has not been submitted. + + @param Recorder the Recorder to use for storing commands + @param RequiredImageProperties properties the returned SkImage must possess (e.g., + mipmaps) + @return created SkImage, or nullptr + */ + sk_sp makeTextureImage(skgpu::graphite::Recorder*, + RequiredImageProperties = {}) const; + + /** Returns subset of this image. + + Returns nullptr if any of the following are true: + - Subset is empty + - Subset is not contained inside the image's bounds + - Pixels in the image could not be read or copied + + If this image is texture-backed, the recorder parameter is required. + If the recorder parameter is provided, and the image is raster-backed, the subset will + be converted to texture-backed. + + @param subset bounds of returned SkImage + @param recorder the recorder in which to create the new image + @param RequiredImageProperties properties the returned SkImage must possess (e.g., + mipmaps) + @return the subsetted image, or nullptr + */ + sk_sp makeSubset(const SkIRect& subset, + skgpu::graphite::Recorder*, + RequiredImageProperties = {}) const; + + /** Creates SkImage in target SkColorSpace. + Returns nullptr if SkImage could not be created. + + Returns original SkImage if it is in target SkColorSpace. + Otherwise, converts pixels from SkImage SkColorSpace to target SkColorSpace. + If SkImage colorSpace() returns nullptr, SkImage SkColorSpace is assumed to be sRGB. + + If this image is graphite-backed, the recorder parameter is required. + + @param targetColorSpace SkColorSpace describing color range of returned SkImage + @param recorder The Recorder in which to create the new image + @param RequiredImageProperties properties the returned SkImage must possess (e.g., + mipmaps) + @return created SkImage in target SkColorSpace + */ + sk_sp makeColorSpace(sk_sp targetColorSpace, + skgpu::graphite::Recorder*, + RequiredImageProperties = {}) const; + + /** Experimental. + Creates SkImage in target SkColorType and SkColorSpace. + Returns nullptr if SkImage could not be created. + + Returns original SkImage if it is in target SkColorType and SkColorSpace. + + If this image is graphite-backed, the recorder parameter is required. + + @param targetColorType SkColorType of returned SkImage + @param targetColorSpace SkColorSpace of returned SkImage + @param recorder The Recorder in which to create the new image + @param RequiredImageProperties properties the returned SkImage must possess (e.g., + mipmaps) + @return created SkImage in target SkColorType and SkColorSpace + */ + sk_sp makeColorTypeAndColorSpace(SkColorType targetColorType, + sk_sp targetColorSpace, + skgpu::graphite::Recorder*, + RequiredImageProperties = {}) const; + +#endif // SK_GRAPHITE + + /** Returns raster image or lazy image. Copies SkImage backed by GPU texture into + CPU memory if needed. Returns original SkImage if decoded in raster bitmap, + or if encoded in a stream. + + Returns nullptr if backed by GPU texture and copy fails. + + @return raster image, lazy image, or nullptr + + example: https://fiddle.skia.org/c/@Image_makeNonTextureImage + */ + sk_sp makeNonTextureImage() const; + + /** Returns raster image. Copies SkImage backed by GPU texture into CPU memory, + or decodes SkImage from lazy image. Returns original SkImage if decoded in + raster bitmap. + + Returns nullptr if copy, decode, or pixel read fails. + + If cachingHint is kAllow_CachingHint, pixels may be retained locally. + If cachingHint is kDisallow_CachingHint, pixels are not added to the local cache. + + @return raster image, or nullptr + + example: https://fiddle.skia.org/c/@Image_makeRasterImage + */ + sk_sp makeRasterImage(CachingHint cachingHint = kDisallow_CachingHint) const; + + /** Creates filtered SkImage. filter processes original SkImage, potentially changing + color, position, and size. subset is the bounds of original SkImage processed + by filter. clipBounds is the expected bounds of the filtered SkImage. outSubset + is required storage for the actual bounds of the filtered SkImage. offset is + required storage for translation of returned SkImage. + + Returns nullptr if SkImage could not be created or if the recording context provided doesn't + match the GPU context in which the image was created. If nullptr is returned, outSubset + and offset are undefined. + + Useful for animation of SkImageFilter that varies size from frame to frame. + Returned SkImage is created larger than required by filter so that GPU texture + can be reused with different sized effects. outSubset describes the valid bounds + of GPU texture returned. offset translates the returned SkImage to keep subsequent + animation frames aligned with respect to each other. + + @param context the GrRecordingContext in play - if it exists + @param filter how SkImage is sampled when transformed + @param subset bounds of SkImage processed by filter + @param clipBounds expected bounds of filtered SkImage + @param outSubset storage for returned SkImage bounds + @param offset storage for returned SkImage translation + @return filtered SkImage, or nullptr + */ + sk_sp makeWithFilter(GrRecordingContext* context, + const SkImageFilter* filter, const SkIRect& subset, + const SkIRect& clipBounds, SkIRect* outSubset, + SkIPoint* offset) const; + + /** Defines a callback function, taking one parameter of type GrBackendTexture with + no return value. Function is called when back-end texture is to be released. + */ + typedef std::function BackendTextureReleaseProc; + +#if defined(SK_GANESH) + /** Creates a GrBackendTexture from the provided SkImage. Returns true and + stores result in backendTexture and backendTextureReleaseProc if + texture is created; otherwise, returns false and leaves + backendTexture and backendTextureReleaseProc unmodified. + + Call backendTextureReleaseProc after deleting backendTexture. + backendTextureReleaseProc cleans up auxiliary data related to returned + backendTexture. The caller must delete returned backendTexture after use. + + If SkImage is both texture backed and singly referenced, image is returned in + backendTexture without conversion or making a copy. SkImage is singly referenced + if its was transferred solely using std::move(). + + If SkImage is not texture backed, returns texture with SkImage contents. + + @param context GPU context + @param image SkImage used for texture + @param backendTexture storage for back-end texture + @param backendTextureReleaseProc storage for clean up function + @return true if back-end texture was created + */ + static bool MakeBackendTextureFromSkImage(GrDirectContext* context, + sk_sp image, + GrBackendTexture* backendTexture, + BackendTextureReleaseProc* backendTextureReleaseProc); +#endif + /** Deprecated. + */ + enum LegacyBitmapMode { + kRO_LegacyBitmapMode, //!< returned bitmap is read-only and immutable + }; + + /** Deprecated. + Creates raster SkBitmap with same pixels as SkImage. If legacyBitmapMode is + kRO_LegacyBitmapMode, returned bitmap is read-only and immutable. + Returns true if SkBitmap is stored in bitmap. Returns false and resets bitmap if + SkBitmap write did not succeed. + + @param bitmap storage for legacy SkBitmap + @param legacyBitmapMode bitmap is read-only and immutable + @return true if SkBitmap was created + */ + bool asLegacyBitmap(SkBitmap* bitmap, + LegacyBitmapMode legacyBitmapMode = kRO_LegacyBitmapMode) const; + + /** Returns true if SkImage is backed by an image-generator or other service that creates + and caches its pixels or texture on-demand. + + @return true if SkImage is created as needed + + example: https://fiddle.skia.org/c/@Image_isLazyGenerated_a + example: https://fiddle.skia.org/c/@Image_isLazyGenerated_b + */ + bool isLazyGenerated() const; + + /** Creates SkImage in target SkColorSpace. + Returns nullptr if SkImage could not be created. + + Returns original SkImage if it is in target SkColorSpace. + Otherwise, converts pixels from SkImage SkColorSpace to target SkColorSpace. + If SkImage colorSpace() returns nullptr, SkImage SkColorSpace is assumed to be sRGB. + + If this image is texture-backed, the context parameter is required and must match the + context of the source image. + + @param target SkColorSpace describing color range of returned SkImage + @param direct The GrDirectContext in play, if it exists + @return created SkImage in target SkColorSpace + + example: https://fiddle.skia.org/c/@Image_makeColorSpace + */ + sk_sp makeColorSpace(sk_sp target, + GrDirectContext* direct = nullptr) const; + + /** Experimental. + Creates SkImage in target SkColorType and SkColorSpace. + Returns nullptr if SkImage could not be created. + + Returns original SkImage if it is in target SkColorType and SkColorSpace. + + If this image is texture-backed, the context parameter is required and must match the + context of the source image. + + @param targetColorType SkColorType of returned SkImage + @param targetColorSpace SkColorSpace of returned SkImage + @param direct The GrDirectContext in play, if it exists + @return created SkImage in target SkColorType and SkColorSpace + */ + sk_sp makeColorTypeAndColorSpace(SkColorType targetColorType, + sk_sp targetColorSpace, + GrDirectContext* direct = nullptr) const; + + /** Creates a new SkImage identical to this one, but with a different SkColorSpace. + This does not convert the underlying pixel data, so the resulting image will draw + differently. + */ + sk_sp reinterpretColorSpace(sk_sp newColorSpace) const; + +private: + SkImage(const SkImageInfo& info, uint32_t uniqueID); + + friend class SkBitmap; + friend class SkImage_Base; // for private ctor + friend class SkImage_Raster; // for withMipmaps + friend class SkMipmapBuilder; + + SkImageInfo fInfo; + const uint32_t fUniqueID; + + sk_sp withMipmaps(sk_sp) const; + + using INHERITED = SkRefCnt; + +public: +#if !defined(SK_DISABLE_LEGACY_IMAGE_FACTORIES) +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 + /** (See Skia bug 7447) + Creates SkImage from Android hardware buffer. + Returned SkImage takes a reference on the buffer. + + Only available on Android, when __ANDROID_API__ is defined to be 26 or greater. + + @param hardwareBuffer AHardwareBuffer Android hardware buffer + @param colorSpace range of colors; may be nullptr + @return created SkImage, or nullptr + */ + static sk_sp MakeFromAHardwareBuffer( + AHardwareBuffer* hardwareBuffer, + SkAlphaType alphaType = kPremul_SkAlphaType); + static sk_sp MakeFromAHardwareBuffer( + AHardwareBuffer* hardwareBuffer, + SkAlphaType alphaType, + sk_sp colorSpace, + GrSurfaceOrigin surfaceOrigin = kTopLeft_GrSurfaceOrigin); + + /** Creates SkImage from Android hardware buffer and uploads the data from the SkPixmap to it. + Returned SkImage takes a reference on the buffer. + + Only available on Android, when __ANDROID_API__ is defined to be 26 or greater. + + @param context GPU context + @param pixmap SkPixmap that contains data to be uploaded to the AHardwareBuffer + @param hardwareBuffer AHardwareBuffer Android hardware buffer + @param surfaceOrigin surface origin for resulting image + @return created SkImage, or nullptr + */ + static sk_sp MakeFromAHardwareBufferWithData( + GrDirectContext* context, + const SkPixmap& pixmap, + AHardwareBuffer* hardwareBuffer, + GrSurfaceOrigin surfaceOrigin = kTopLeft_GrSurfaceOrigin); +#endif // SK_BUILD_FOR_ANDROID && __ANDROID_API__ >= 26 + +#endif // !SK_DISABLE_LEGACY_IMAGE_FACTORIES +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkImageEncoder.h b/gfx/skia/skia/include/core/SkImageEncoder.h new file mode 100644 index 0000000000..ca2406b4d1 --- /dev/null +++ b/gfx/skia/skia/include/core/SkImageEncoder.h @@ -0,0 +1,71 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageEncoder_DEFINED +#define SkImageEncoder_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkBitmap; +class SkData; +class SkPixmap; +class SkWStream; +enum class SkEncodedImageFormat; + +/** + * Encode SkPixmap in the given binary image format. + * + * @param dst results are written to this stream. + * @param src source pixels. + * @param format image format, not all formats are supported. + * @param quality range from 0-100, this is supported by jpeg and webp. + * higher values correspond to improved visual quality, but less compression. + * + * @return false iff input is bad or format is unsupported. + * + * Will always return false if Skia is compiled without image + * encoders. + * + * For SkEncodedImageFormat::kWEBP, if quality is 100, it will use lossless compression. Otherwise + * it will use lossy. + * + * For examples of encoding an image to a file or to a block of memory, + * see tools/ToolUtils.h. + */ +SK_API bool SkEncodeImage(SkWStream* dst, const SkPixmap& src, + SkEncodedImageFormat format, int quality); + +/** + * The following helper function wraps SkEncodeImage(). + */ +SK_API bool SkEncodeImage(SkWStream* dst, const SkBitmap& src, SkEncodedImageFormat f, int q); + +/** + * Encode SkPixmap in the given binary image format. + * + * @param src source pixels. + * @param format image format, not all formats are supported. + * @param quality range from 0-100, this is supported by jpeg and webp. + * higher values correspond to improved visual quality, but less compression. + * + * @return encoded data or nullptr if input is bad or format is unsupported. + * + * Will always return nullptr if Skia is compiled without image + * encoders. + * + * For SkEncodedImageFormat::kWEBP, if quality is 100, it will use lossless compression. Otherwise + * it will use lossy. + */ +SK_API sk_sp SkEncodePixmap(const SkPixmap& src, SkEncodedImageFormat format, int quality); + +/** + * Helper that extracts the pixmap from the bitmap, and then calls SkEncodePixmap() + */ +SK_API sk_sp SkEncodeBitmap(const SkBitmap& src, SkEncodedImageFormat format, int quality); + +#endif // SkImageEncoder_DEFINED diff --git a/gfx/skia/skia/include/core/SkImageFilter.h b/gfx/skia/skia/include/core/SkImageFilter.h new file mode 100644 index 0000000000..e2240916d4 --- /dev/null +++ b/gfx/skia/skia/include/core/SkImageFilter.h @@ -0,0 +1,114 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageFilter_DEFINED +#define SkImageFilter_DEFINED + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkRect.h" + +class SkColorFilter; + +/** + * Base class for image filters. If one is installed in the paint, then all drawing occurs as + * usual, but it is as if the drawing happened into an offscreen (before the xfermode is applied). + * This offscreen bitmap will then be handed to the imagefilter, who in turn creates a new bitmap + * which is what will finally be drawn to the device (using the original xfermode). + * + * The local space of image filters matches the local space of the drawn geometry. For instance if + * there is rotation on the canvas, the blur will be computed along those rotated axes and not in + * the device space. In order to achieve this result, the actual drawing of the geometry may happen + * in an unrotated coordinate system so that the filtered image can be computed more easily, and + * then it will be post transformed to match what would have been produced if the geometry were + * drawn with the total canvas matrix to begin with. + */ +class SK_API SkImageFilter : public SkFlattenable { +public: + enum MapDirection { + kForward_MapDirection, + kReverse_MapDirection, + }; + /** + * Map a device-space rect recursively forward or backward through the filter DAG. + * kForward_MapDirection is used to determine which pixels of the destination canvas a source + * image rect would touch after filtering. kReverse_MapDirection is used to determine which rect + * of the source image would be required to fill the given rect (typically, clip bounds). Used + * for clipping and temp-buffer allocations, so the result need not be exact, but should never + * be smaller than the real answer. The default implementation recursively unions all input + * bounds, or returns the source rect if no inputs. + * + * In kReverse mode, 'inputRect' is the device-space bounds of the input pixels. In kForward + * mode it should always be null. If 'inputRect' is null in kReverse mode the resulting answer + * may be incorrect. + */ + SkIRect filterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect = nullptr) const; + + /** + * Returns whether this image filter is a color filter and puts the color filter into the + * "filterPtr" parameter if it can. Does nothing otherwise. + * If this returns false, then the filterPtr is unchanged. + * If this returns true, then if filterPtr is not null, it must be set to a ref'd colorfitler + * (i.e. it may not be set to NULL). + */ + bool isColorFilterNode(SkColorFilter** filterPtr) const; + + // DEPRECATED : use isColorFilterNode() instead + bool asColorFilter(SkColorFilter** filterPtr) const { + return this->isColorFilterNode(filterPtr); + } + + /** + * Returns true (and optionally returns a ref'd filter) if this imagefilter can be completely + * replaced by the returned colorfilter. i.e. the two effects will affect drawing in the same + * way. + */ + bool asAColorFilter(SkColorFilter** filterPtr) const; + + /** + * Returns the number of inputs this filter will accept (some inputs can be NULL). + */ + int countInputs() const; + + /** + * Returns the input filter at a given index, or NULL if no input is connected. The indices + * used are filter-specific. + */ + const SkImageFilter* getInput(int i) const; + + // Default impl returns union of all input bounds. + virtual SkRect computeFastBounds(const SkRect& bounds) const; + + // Can this filter DAG compute the resulting bounds of an object-space rectangle? + bool canComputeFastBounds() const; + + /** + * If this filter can be represented by another filter + a localMatrix, return that filter, + * else return null. + */ + sk_sp makeWithLocalMatrix(const SkMatrix& matrix) const; + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr) { + return sk_sp(static_cast( + SkFlattenable::Deserialize(kSkImageFilter_Type, data, size, procs).release())); + } + +protected: + + sk_sp refMe() const { + return sk_ref_sp(const_cast(this)); + } + +private: + friend class SkImageFilter_Base; + + using INHERITED = SkFlattenable; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkImageGenerator.h b/gfx/skia/skia/include/core/SkImageGenerator.h new file mode 100644 index 0000000000..438739ec69 --- /dev/null +++ b/gfx/skia/skia/include/core/SkImageGenerator.h @@ -0,0 +1,231 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageGenerator_DEFINED +#define SkImageGenerator_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkYUVAPixmaps.h" +#include "include/private/base/SkAPI.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrTypes.h" +#endif + +#include +#include +#include +#include + +class GrRecordingContext; +class GrSurfaceProxyView; +class SkColorSpace; +class SkMatrix; +class SkPaint; +class SkPicture; +class SkSurfaceProps; +enum SkAlphaType : int; +enum class GrImageTexGenPolicy : int; +namespace skgpu { enum class Mipmapped : bool; } +struct SkISize; + +class SK_API SkImageGenerator { +public: + /** + * The PixelRef which takes ownership of this SkImageGenerator + * will call the image generator's destructor. + */ + virtual ~SkImageGenerator() { } + + uint32_t uniqueID() const { return fUniqueID; } + + /** + * Return a ref to the encoded (i.e. compressed) representation + * of this data. + * + * If non-NULL is returned, the caller is responsible for calling + * unref() on the data when it is finished. + */ + sk_sp refEncodedData() { + return this->onRefEncodedData(); + } + + /** + * Return the ImageInfo associated with this generator. + */ + const SkImageInfo& getInfo() const { return fInfo; } + + /** + * Can this generator be used to produce images that will be drawable to the specified context + * (or to CPU, if context is nullptr)? + */ + bool isValid(GrRecordingContext* context) const { + return this->onIsValid(context); + } + + /** + * Decode into the given pixels, a block of memory of size at + * least (info.fHeight - 1) * rowBytes + (info.fWidth * + * bytesPerPixel) + * + * Repeated calls to this function should give the same results, + * allowing the PixelRef to be immutable. + * + * @param info A description of the format + * expected by the caller. This can simply be identical + * to the info returned by getInfo(). + * + * This contract also allows the caller to specify + * different output-configs, which the implementation can + * decide to support or not. + * + * A size that does not match getInfo() implies a request + * to scale. If the generator cannot perform this scale, + * it will return false. + * + * @return true on success. + */ + bool getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes); + + bool getPixels(const SkPixmap& pm) { + return this->getPixels(pm.info(), pm.writable_addr(), pm.rowBytes()); + } + + /** + * If decoding to YUV is supported, this returns true. Otherwise, this + * returns false and the caller will ignore output parameter yuvaPixmapInfo. + * + * @param supportedDataTypes Indicates the data type/planar config combinations that are + * supported by the caller. If the generator supports decoding to + * YUV(A), but not as a type in supportedDataTypes, this method + * returns false. + * @param yuvaPixmapInfo Output parameter that specifies the planar configuration, subsampling, + * orientation, chroma siting, plane color types, and row bytes. + */ + bool queryYUVAInfo(const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes, + SkYUVAPixmapInfo* yuvaPixmapInfo) const; + + /** + * Returns true on success and false on failure. + * This always attempts to perform a full decode. To get the planar + * configuration without decoding use queryYUVAInfo(). + * + * @param yuvaPixmaps Contains preallocated pixmaps configured according to a successful call + * to queryYUVAInfo(). + */ + bool getYUVAPlanes(const SkYUVAPixmaps& yuvaPixmaps); + +#if defined(SK_GANESH) + /** + * If the generator can natively/efficiently return its pixels as a GPU image (backed by a + * texture) this will return that image. If not, this will return NULL. + * + * Regarding the GrRecordingContext parameter: + * + * It must be non-NULL. The generator should only succeed if: + * - its internal context is the same + * - it can somehow convert its texture into one that is valid for the provided context. + * + * If the mipmapped parameter is kYes, the generator should try to create a TextureProxy that + * at least has the mip levels allocated and the base layer filled in. If this is not possible, + * the generator is allowed to return a non mipped proxy, but this will have some additional + * overhead in later allocating mips and copying of the base layer. + * + * GrImageTexGenPolicy determines whether or not a new texture must be created (and its budget + * status) or whether this may (but is not required to) return a pre-existing texture that is + * retained by the generator (kDraw). + */ + GrSurfaceProxyView generateTexture(GrRecordingContext*, + const SkImageInfo& info, + skgpu::Mipmapped mipmapped, + GrImageTexGenPolicy); +#endif + +#if defined(SK_GRAPHITE) + sk_sp makeTextureImage(skgpu::graphite::Recorder*, + const SkImageInfo&, + skgpu::Mipmapped); +#endif + + /** + * If the default image decoder system can interpret the specified (encoded) data, then + * this returns a new ImageGenerator for it. Otherwise this returns NULL. Either way + * the caller is still responsible for managing their ownership of the data. + * By default, images will be converted to premultiplied pixels. The alpha type can be + * overridden by specifying kPremul_SkAlphaType or kUnpremul_SkAlphaType. Specifying + * kOpaque_SkAlphaType is not supported, and will return NULL. + */ + static std::unique_ptr MakeFromEncoded( + sk_sp, std::optional = std::nullopt); + + /** Return a new image generator backed by the specified picture. If the size is empty or + * the picture is NULL, this returns NULL. + * The optional matrix and paint arguments are passed to drawPicture() at rasterization + * time. + */ + static std::unique_ptr MakeFromPicture(const SkISize&, sk_sp, + const SkMatrix*, const SkPaint*, + SkImage::BitDepth, + sk_sp, + SkSurfaceProps props); + static std::unique_ptr MakeFromPicture(const SkISize&, sk_sp, + const SkMatrix*, const SkPaint*, + SkImage::BitDepth, + sk_sp); +protected: + static constexpr int kNeedNewImageUniqueID = 0; + + SkImageGenerator(const SkImageInfo& info, uint32_t uniqueId = kNeedNewImageUniqueID); + + virtual sk_sp onRefEncodedData() { return nullptr; } + struct Options {}; + virtual bool onGetPixels(const SkImageInfo&, void*, size_t, const Options&) { return false; } + virtual bool onIsValid(GrRecordingContext*) const { return true; } + virtual bool onQueryYUVAInfo(const SkYUVAPixmapInfo::SupportedDataTypes&, + SkYUVAPixmapInfo*) const { return false; } + virtual bool onGetYUVAPlanes(const SkYUVAPixmaps&) { return false; } +#if defined(SK_GANESH) + // returns nullptr + virtual GrSurfaceProxyView onGenerateTexture(GrRecordingContext*, const SkImageInfo&, + GrMipmapped, GrImageTexGenPolicy); + + // Most internal SkImageGenerators produce textures and views that use kTopLeft_GrSurfaceOrigin. + // If the generator may produce textures with different origins (e.g. + // GrAHardwareBufferImageGenerator) it should override this function to return the correct + // origin. + virtual GrSurfaceOrigin origin() const { return kTopLeft_GrSurfaceOrigin; } +#endif + +#if defined(SK_GRAPHITE) + virtual sk_sp onMakeTextureImage(skgpu::graphite::Recorder*, + const SkImageInfo&, + skgpu::Mipmapped); +#endif + +private: + const SkImageInfo fInfo; + const uint32_t fUniqueID; + + friend class SkImage_Lazy; + + // This is our default impl, which may be different on different platforms. + // It is called from NewFromEncoded() after it has checked for any runtime factory. + // The SkData will never be NULL, as that will have been checked by NewFromEncoded. + static std::unique_ptr MakeFromEncodedImpl(sk_sp, + std::optional); + + SkImageGenerator(SkImageGenerator&&) = delete; + SkImageGenerator(const SkImageGenerator&) = delete; + SkImageGenerator& operator=(SkImageGenerator&&) = delete; + SkImageGenerator& operator=(const SkImageGenerator&) = delete; +}; + +#endif // SkImageGenerator_DEFINED diff --git a/gfx/skia/skia/include/core/SkImageInfo.h b/gfx/skia/skia/include/core/SkImageInfo.h new file mode 100644 index 0000000000..b566171900 --- /dev/null +++ b/gfx/skia/skia/include/core/SkImageInfo.h @@ -0,0 +1,616 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageInfo_DEFINED +#define SkImageInfo_DEFINED + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorType.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTFitsIn.h" + +#include +#include +#include + +class SkColorSpace; + +/** Returns the number of bytes required to store a pixel, including unused padding. + Returns zero if ct is kUnknown_SkColorType or invalid. + + @return bytes per pixel +*/ +SK_API int SkColorTypeBytesPerPixel(SkColorType ct); + +/** Returns true if SkColorType always decodes alpha to 1.0, making the pixel + fully opaque. If true, SkColorType does not reserve bits to encode alpha. + + @return true if alpha is always set to 1.0 +*/ +SK_API bool SkColorTypeIsAlwaysOpaque(SkColorType ct); + +/** Returns true if canonical can be set to a valid SkAlphaType for colorType. If + there is more than one valid canonical SkAlphaType, set to alphaType, if valid. + If true is returned and canonical is not nullptr, store valid SkAlphaType. + + Returns false only if alphaType is kUnknown_SkAlphaType, color type is not + kUnknown_SkColorType, and SkColorType is not always opaque. If false is returned, + canonical is ignored. + + @param canonical storage for SkAlphaType + @return true if valid SkAlphaType can be associated with colorType +*/ +SK_API bool SkColorTypeValidateAlphaType(SkColorType colorType, SkAlphaType alphaType, + SkAlphaType* canonical = nullptr); + +/** \enum SkImageInfo::SkYUVColorSpace + Describes color range of YUV pixels. The color mapping from YUV to RGB varies + depending on the source. YUV pixels may be generated by JPEG images, standard + video streams, or high definition video streams. Each has its own mapping from + YUV to RGB. + + JPEG YUV values encode the full range of 0 to 255 for all three components. + Video YUV values often range from 16 to 235 for Y and from 16 to 240 for U and V (limited). + Details of encoding and conversion to RGB are described in YCbCr color space. + + The identity colorspace exists to provide a utility mapping from Y to R, U to G and V to B. + It can be used to visualize the YUV planes or to explicitly post process the YUV channels. +*/ +enum SkYUVColorSpace : int { + kJPEG_Full_SkYUVColorSpace, //!< describes full range + kRec601_Limited_SkYUVColorSpace, //!< describes SDTV range + kRec709_Full_SkYUVColorSpace, //!< describes HDTV range + kRec709_Limited_SkYUVColorSpace, + kBT2020_8bit_Full_SkYUVColorSpace, //!< describes UHDTV range, non-constant-luminance + kBT2020_8bit_Limited_SkYUVColorSpace, + kBT2020_10bit_Full_SkYUVColorSpace, + kBT2020_10bit_Limited_SkYUVColorSpace, + kBT2020_12bit_Full_SkYUVColorSpace, + kBT2020_12bit_Limited_SkYUVColorSpace, + kIdentity_SkYUVColorSpace, //!< maps Y->R, U->G, V->B + + kLastEnum_SkYUVColorSpace = kIdentity_SkYUVColorSpace, //!< last valid value + + // Legacy (deprecated) names: + kJPEG_SkYUVColorSpace = kJPEG_Full_SkYUVColorSpace, + kRec601_SkYUVColorSpace = kRec601_Limited_SkYUVColorSpace, + kRec709_SkYUVColorSpace = kRec709_Limited_SkYUVColorSpace, + kBT2020_SkYUVColorSpace = kBT2020_8bit_Limited_SkYUVColorSpace, +}; + +/** \struct SkColorInfo + Describes pixel and encoding. SkImageInfo can be created from SkColorInfo by + providing dimensions. + + It encodes how pixel bits describe alpha, transparency; color components red, blue, + and green; and SkColorSpace, the range and linearity of colors. +*/ +class SK_API SkColorInfo { +public: + /** Creates an SkColorInfo with kUnknown_SkColorType, kUnknown_SkAlphaType, + and no SkColorSpace. + + @return empty SkImageInfo + */ + SkColorInfo(); + ~SkColorInfo(); + + /** Creates SkColorInfo from SkColorType ct, SkAlphaType at, and optionally SkColorSpace cs. + + If SkColorSpace cs is nullptr and SkColorInfo is part of drawing source: SkColorSpace + defaults to sRGB, mapping into SkSurface SkColorSpace. + + Parameters are not validated to see if their values are legal, or that the + combination is supported. + @return created SkColorInfo + */ + SkColorInfo(SkColorType ct, SkAlphaType at, sk_sp cs); + + SkColorInfo(const SkColorInfo&); + SkColorInfo(SkColorInfo&&); + + SkColorInfo& operator=(const SkColorInfo&); + SkColorInfo& operator=(SkColorInfo&&); + + SkColorSpace* colorSpace() const; + sk_sp refColorSpace() const; + SkColorType colorType() const { return fColorType; } + SkAlphaType alphaType() const { return fAlphaType; } + + bool isOpaque() const { + return SkAlphaTypeIsOpaque(fAlphaType) + || SkColorTypeIsAlwaysOpaque(fColorType); + } + + bool gammaCloseToSRGB() const; + + /** Does other represent the same color type, alpha type, and color space? */ + bool operator==(const SkColorInfo& other) const; + + /** Does other represent a different color type, alpha type, or color space? */ + bool operator!=(const SkColorInfo& other) const; + + /** Creates SkColorInfo with same SkColorType, SkColorSpace, with SkAlphaType set + to newAlphaType. + + Created SkColorInfo contains newAlphaType even if it is incompatible with + SkColorType, in which case SkAlphaType in SkColorInfo is ignored. + */ + SkColorInfo makeAlphaType(SkAlphaType newAlphaType) const; + + /** Creates new SkColorInfo with same SkAlphaType, SkColorSpace, with SkColorType + set to newColorType. + */ + SkColorInfo makeColorType(SkColorType newColorType) const; + + /** Creates SkColorInfo with same SkAlphaType, SkColorType, with SkColorSpace + set to cs. cs may be nullptr. + */ + SkColorInfo makeColorSpace(sk_sp cs) const; + + /** Returns number of bytes per pixel required by SkColorType. + Returns zero if colorType() is kUnknown_SkColorType. + + @return bytes in pixel + + example: https://fiddle.skia.org/c/@ImageInfo_bytesPerPixel + */ + int bytesPerPixel() const; + + /** Returns bit shift converting row bytes to row pixels. + Returns zero for kUnknown_SkColorType. + + @return one of: 0, 1, 2, 3, 4; left shift to convert pixels to bytes + + example: https://fiddle.skia.org/c/@ImageInfo_shiftPerPixel + */ + int shiftPerPixel() const; + +private: + sk_sp fColorSpace; + SkColorType fColorType = kUnknown_SkColorType; + SkAlphaType fAlphaType = kUnknown_SkAlphaType; +}; + +/** \struct SkImageInfo + Describes pixel dimensions and encoding. SkBitmap, SkImage, PixMap, and SkSurface + can be created from SkImageInfo. SkImageInfo can be retrieved from SkBitmap and + SkPixmap, but not from SkImage and SkSurface. For example, SkImage and SkSurface + implementations may defer pixel depth, so may not completely specify SkImageInfo. + + SkImageInfo contains dimensions, the pixel integral width and height. It encodes + how pixel bits describe alpha, transparency; color components red, blue, + and green; and SkColorSpace, the range and linearity of colors. +*/ +struct SK_API SkImageInfo { +public: + + /** Creates an empty SkImageInfo with kUnknown_SkColorType, kUnknown_SkAlphaType, + a width and height of zero, and no SkColorSpace. + + @return empty SkImageInfo + */ + SkImageInfo() = default; + + /** Creates SkImageInfo from integral dimensions width and height, SkColorType ct, + SkAlphaType at, and optionally SkColorSpace cs. + + If SkColorSpace cs is nullptr and SkImageInfo is part of drawing source: SkColorSpace + defaults to sRGB, mapping into SkSurface SkColorSpace. + + Parameters are not validated to see if their values are legal, or that the + combination is supported. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @param cs range of colors; may be nullptr + @return created SkImageInfo + */ + static SkImageInfo Make(int width, int height, SkColorType ct, SkAlphaType at); + static SkImageInfo Make(int width, int height, SkColorType ct, SkAlphaType at, + sk_sp cs); + static SkImageInfo Make(SkISize dimensions, SkColorType ct, SkAlphaType at); + static SkImageInfo Make(SkISize dimensions, SkColorType ct, SkAlphaType at, + sk_sp cs); + + /** Creates SkImageInfo from integral dimensions and SkColorInfo colorInfo, + + Parameters are not validated to see if their values are legal, or that the + combination is supported. + + @param dimensions pixel column and row count; must be zeros or greater + @param SkColorInfo the pixel encoding consisting of SkColorType, SkAlphaType, and + SkColorSpace (which may be nullptr) + @return created SkImageInfo + */ + static SkImageInfo Make(SkISize dimensions, const SkColorInfo& colorInfo) { + return SkImageInfo(dimensions, colorInfo); + } + static SkImageInfo Make(SkISize dimensions, SkColorInfo&& colorInfo) { + return SkImageInfo(dimensions, std::move(colorInfo)); + } + + /** Creates SkImageInfo from integral dimensions width and height, kN32_SkColorType, + SkAlphaType at, and optionally SkColorSpace cs. kN32_SkColorType will equal either + kBGRA_8888_SkColorType or kRGBA_8888_SkColorType, whichever is optimal. + + If SkColorSpace cs is nullptr and SkImageInfo is part of drawing source: SkColorSpace + defaults to sRGB, mapping into SkSurface SkColorSpace. + + Parameters are not validated to see if their values are legal, or that the + combination is supported. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @param cs range of colors; may be nullptr + @return created SkImageInfo + */ + static SkImageInfo MakeN32(int width, int height, SkAlphaType at); + static SkImageInfo MakeN32(int width, int height, SkAlphaType at, sk_sp cs); + + /** Creates SkImageInfo from integral dimensions width and height, kN32_SkColorType, + SkAlphaType at, with sRGB SkColorSpace. + + Parameters are not validated to see if their values are legal, or that the + combination is supported. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @return created SkImageInfo + + example: https://fiddle.skia.org/c/@ImageInfo_MakeS32 + */ + static SkImageInfo MakeS32(int width, int height, SkAlphaType at); + + /** Creates SkImageInfo from integral dimensions width and height, kN32_SkColorType, + kPremul_SkAlphaType, with optional SkColorSpace. + + If SkColorSpace cs is nullptr and SkImageInfo is part of drawing source: SkColorSpace + defaults to sRGB, mapping into SkSurface SkColorSpace. + + Parameters are not validated to see if their values are legal, or that the + combination is supported. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @param cs range of colors; may be nullptr + @return created SkImageInfo + */ + static SkImageInfo MakeN32Premul(int width, int height); + static SkImageInfo MakeN32Premul(int width, int height, sk_sp cs); + + /** Creates SkImageInfo from integral dimensions width and height, kN32_SkColorType, + kPremul_SkAlphaType, with SkColorSpace set to nullptr. + + If SkImageInfo is part of drawing source: SkColorSpace defaults to sRGB, mapping + into SkSurface SkColorSpace. + + Parameters are not validated to see if their values are legal, or that the + combination is supported. + + @param dimensions width and height, each must be zero or greater + @param cs range of colors; may be nullptr + @return created SkImageInfo + */ + static SkImageInfo MakeN32Premul(SkISize dimensions); + static SkImageInfo MakeN32Premul(SkISize dimensions, sk_sp cs); + + /** Creates SkImageInfo from integral dimensions width and height, kAlpha_8_SkColorType, + kPremul_SkAlphaType, with SkColorSpace set to nullptr. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @return created SkImageInfo + */ + static SkImageInfo MakeA8(int width, int height); + /** Creates SkImageInfo from integral dimensions, kAlpha_8_SkColorType, + kPremul_SkAlphaType, with SkColorSpace set to nullptr. + + @param dimensions pixel row and column count; must be zero or greater + @return created SkImageInfo + */ + static SkImageInfo MakeA8(SkISize dimensions); + + /** Creates SkImageInfo from integral dimensions width and height, kUnknown_SkColorType, + kUnknown_SkAlphaType, with SkColorSpace set to nullptr. + + Returned SkImageInfo as part of source does not draw, and as part of destination + can not be drawn to. + + @param width pixel column count; must be zero or greater + @param height pixel row count; must be zero or greater + @return created SkImageInfo + */ + static SkImageInfo MakeUnknown(int width, int height); + + /** Creates SkImageInfo from integral dimensions width and height set to zero, + kUnknown_SkColorType, kUnknown_SkAlphaType, with SkColorSpace set to nullptr. + + Returned SkImageInfo as part of source does not draw, and as part of destination + can not be drawn to. + + @return created SkImageInfo + */ + static SkImageInfo MakeUnknown() { + return MakeUnknown(0, 0); + } + + /** Returns pixel count in each row. + + @return pixel width + */ + int width() const { return fDimensions.width(); } + + /** Returns pixel row count. + + @return pixel height + */ + int height() const { return fDimensions.height(); } + + SkColorType colorType() const { return fColorInfo.colorType(); } + + SkAlphaType alphaType() const { return fColorInfo.alphaType(); } + + /** Returns SkColorSpace, the range of colors. The reference count of + SkColorSpace is unchanged. The returned SkColorSpace is immutable. + + @return SkColorSpace, or nullptr + */ + SkColorSpace* colorSpace() const; + + /** Returns smart pointer to SkColorSpace, the range of colors. The smart pointer + tracks the number of objects sharing this SkColorSpace reference so the memory + is released when the owners destruct. + + The returned SkColorSpace is immutable. + + @return SkColorSpace wrapped in a smart pointer + */ + sk_sp refColorSpace() const; + + /** Returns if SkImageInfo describes an empty area of pixels by checking if either + width or height is zero or smaller. + + @return true if either dimension is zero or smaller + */ + bool isEmpty() const { return fDimensions.isEmpty(); } + + /** Returns the dimensionless SkColorInfo that represents the same color type, + alpha type, and color space as this SkImageInfo. + */ + const SkColorInfo& colorInfo() const { return fColorInfo; } + + /** Returns true if SkAlphaType is set to hint that all pixels are opaque; their + alpha value is implicitly or explicitly 1.0. If true, and all pixels are + not opaque, Skia may draw incorrectly. + + Does not check if SkColorType allows alpha, or if any pixel value has + transparency. + + @return true if SkAlphaType is kOpaque_SkAlphaType + */ + bool isOpaque() const { return fColorInfo.isOpaque(); } + + /** Returns SkISize { width(), height() }. + + @return integral size of width() and height() + */ + SkISize dimensions() const { return fDimensions; } + + /** Returns SkIRect { 0, 0, width(), height() }. + + @return integral rectangle from origin to width() and height() + */ + SkIRect bounds() const { return SkIRect::MakeSize(fDimensions); } + + /** Returns true if associated SkColorSpace is not nullptr, and SkColorSpace gamma + is approximately the same as sRGB. + This includes the + + @return true if SkColorSpace gamma is approximately the same as sRGB + */ + bool gammaCloseToSRGB() const { return fColorInfo.gammaCloseToSRGB(); } + + /** Creates SkImageInfo with the same SkColorType, SkColorSpace, and SkAlphaType, + with dimensions set to width and height. + + @param newWidth pixel column count; must be zero or greater + @param newHeight pixel row count; must be zero or greater + @return created SkImageInfo + */ + SkImageInfo makeWH(int newWidth, int newHeight) const { + return Make({newWidth, newHeight}, fColorInfo); + } + + /** Creates SkImageInfo with the same SkColorType, SkColorSpace, and SkAlphaType, + with dimensions set to newDimensions. + + @param newSize pixel column and row count; must be zero or greater + @return created SkImageInfo + */ + SkImageInfo makeDimensions(SkISize newSize) const { + return Make(newSize, fColorInfo); + } + + /** Creates SkImageInfo with same SkColorType, SkColorSpace, width, and height, + with SkAlphaType set to newAlphaType. + + Created SkImageInfo contains newAlphaType even if it is incompatible with + SkColorType, in which case SkAlphaType in SkImageInfo is ignored. + + @return created SkImageInfo + */ + SkImageInfo makeAlphaType(SkAlphaType newAlphaType) const { + return Make(fDimensions, fColorInfo.makeAlphaType(newAlphaType)); + } + + /** Creates SkImageInfo with same SkAlphaType, SkColorSpace, width, and height, + with SkColorType set to newColorType. + + @return created SkImageInfo + */ + SkImageInfo makeColorType(SkColorType newColorType) const { + return Make(fDimensions, fColorInfo.makeColorType(newColorType)); + } + + /** Creates SkImageInfo with same SkAlphaType, SkColorType, width, and height, + with SkColorSpace set to cs. + + @param cs range of colors; may be nullptr + @return created SkImageInfo + */ + SkImageInfo makeColorSpace(sk_sp cs) const; + + /** Returns number of bytes per pixel required by SkColorType. + Returns zero if colorType( is kUnknown_SkColorType. + + @return bytes in pixel + */ + int bytesPerPixel() const { return fColorInfo.bytesPerPixel(); } + + /** Returns bit shift converting row bytes to row pixels. + Returns zero for kUnknown_SkColorType. + + @return one of: 0, 1, 2, 3; left shift to convert pixels to bytes + */ + int shiftPerPixel() const { return fColorInfo.shiftPerPixel(); } + + /** Returns minimum bytes per row, computed from pixel width() and SkColorType, which + specifies bytesPerPixel(). SkBitmap maximum value for row bytes must fit + in 31 bits. + + @return width() times bytesPerPixel() as unsigned 64-bit integer + */ + uint64_t minRowBytes64() const { + return (uint64_t)sk_64_mul(this->width(), this->bytesPerPixel()); + } + + /** Returns minimum bytes per row, computed from pixel width() and SkColorType, which + specifies bytesPerPixel(). SkBitmap maximum value for row bytes must fit + in 31 bits. + + @return width() times bytesPerPixel() as size_t + */ + size_t minRowBytes() const { + uint64_t minRowBytes = this->minRowBytes64(); + if (!SkTFitsIn(minRowBytes)) { + return 0; + } + return (size_t)minRowBytes; + } + + /** Returns byte offset of pixel from pixel base address. + + Asserts in debug build if x or y is outside of bounds. Does not assert if + rowBytes is smaller than minRowBytes(), even though result may be incorrect. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @param rowBytes size of pixel row or larger + @return offset within pixel array + + example: https://fiddle.skia.org/c/@ImageInfo_computeOffset + */ + size_t computeOffset(int x, int y, size_t rowBytes) const; + + /** Compares SkImageInfo with other, and returns true if width, height, SkColorType, + SkAlphaType, and SkColorSpace are equivalent. + + @param other SkImageInfo to compare + @return true if SkImageInfo equals other + */ + bool operator==(const SkImageInfo& other) const { + return fDimensions == other.fDimensions && fColorInfo == other.fColorInfo; + } + + /** Compares SkImageInfo with other, and returns true if width, height, SkColorType, + SkAlphaType, and SkColorSpace are not equivalent. + + @param other SkImageInfo to compare + @return true if SkImageInfo is not equal to other + */ + bool operator!=(const SkImageInfo& other) const { + return !(*this == other); + } + + /** Returns storage required by pixel array, given SkImageInfo dimensions, SkColorType, + and rowBytes. rowBytes is assumed to be at least as large as minRowBytes(). + + Returns zero if height is zero. + Returns SIZE_MAX if answer exceeds the range of size_t. + + @param rowBytes size of pixel row or larger + @return memory required by pixel buffer + + example: https://fiddle.skia.org/c/@ImageInfo_computeByteSize + */ + size_t computeByteSize(size_t rowBytes) const; + + /** Returns storage required by pixel array, given SkImageInfo dimensions, and + SkColorType. Uses minRowBytes() to compute bytes for pixel row. + + Returns zero if height is zero. + Returns SIZE_MAX if answer exceeds the range of size_t. + + @return least memory required by pixel buffer + */ + size_t computeMinByteSize() const { + return this->computeByteSize(this->minRowBytes()); + } + + /** Returns true if byteSize equals SIZE_MAX. computeByteSize() and + computeMinByteSize() return SIZE_MAX if size_t can not hold buffer size. + + @param byteSize result of computeByteSize() or computeMinByteSize() + @return true if computeByteSize() or computeMinByteSize() result exceeds size_t + */ + static bool ByteSizeOverflowed(size_t byteSize) { + return SIZE_MAX == byteSize; + } + + /** Returns true if rowBytes is valid for this SkImageInfo. + + @param rowBytes size of pixel row including padding + @return true if rowBytes is large enough to contain pixel row and is properly + aligned + */ + bool validRowBytes(size_t rowBytes) const { + if (rowBytes < this->minRowBytes64()) { + return false; + } + int shift = this->shiftPerPixel(); + size_t alignedRowBytes = rowBytes >> shift << shift; + return alignedRowBytes == rowBytes; + } + + /** Creates an empty SkImageInfo with kUnknown_SkColorType, kUnknown_SkAlphaType, + a width and height of zero, and no SkColorSpace. + */ + void reset() { *this = {}; } + + /** Asserts if internal values are illegal or inconsistent. Only available if + SK_DEBUG is defined at compile time. + */ + SkDEBUGCODE(void validate() const;) + +private: + SkColorInfo fColorInfo; + SkISize fDimensions = {0, 0}; + + SkImageInfo(SkISize dimensions, const SkColorInfo& colorInfo) + : fColorInfo(colorInfo), fDimensions(dimensions) {} + + SkImageInfo(SkISize dimensions, SkColorInfo&& colorInfo) + : fColorInfo(std::move(colorInfo)), fDimensions(dimensions) {} +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkM44.h b/gfx/skia/skia/include/core/SkM44.h new file mode 100644 index 0000000000..11a06a15b1 --- /dev/null +++ b/gfx/skia/skia/include/core/SkM44.h @@ -0,0 +1,438 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkM44_DEFINED +#define SkM44_DEFINED + +#include "include/core/SkMatrix.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" + +struct SK_API SkV2 { + float x, y; + + bool operator==(const SkV2 v) const { return x == v.x && y == v.y; } + bool operator!=(const SkV2 v) const { return !(*this == v); } + + static SkScalar Dot(SkV2 a, SkV2 b) { return a.x * b.x + a.y * b.y; } + static SkScalar Cross(SkV2 a, SkV2 b) { return a.x * b.y - a.y * b.x; } + static SkV2 Normalize(SkV2 v) { return v * (1.0f / v.length()); } + + SkV2 operator-() const { return {-x, -y}; } + SkV2 operator+(SkV2 v) const { return {x+v.x, y+v.y}; } + SkV2 operator-(SkV2 v) const { return {x-v.x, y-v.y}; } + + SkV2 operator*(SkV2 v) const { return {x*v.x, y*v.y}; } + friend SkV2 operator*(SkV2 v, SkScalar s) { return {v.x*s, v.y*s}; } + friend SkV2 operator*(SkScalar s, SkV2 v) { return {v.x*s, v.y*s}; } + friend SkV2 operator/(SkV2 v, SkScalar s) { return {v.x/s, v.y/s}; } + friend SkV2 operator/(SkScalar s, SkV2 v) { return {s/v.x, s/v.y}; } + + void operator+=(SkV2 v) { *this = *this + v; } + void operator-=(SkV2 v) { *this = *this - v; } + void operator*=(SkV2 v) { *this = *this * v; } + void operator*=(SkScalar s) { *this = *this * s; } + void operator/=(SkScalar s) { *this = *this / s; } + + SkScalar lengthSquared() const { return Dot(*this, *this); } + SkScalar length() const { return SkScalarSqrt(this->lengthSquared()); } + + SkScalar dot(SkV2 v) const { return Dot(*this, v); } + SkScalar cross(SkV2 v) const { return Cross(*this, v); } + SkV2 normalize() const { return Normalize(*this); } + + const float* ptr() const { return &x; } + float* ptr() { return &x; } +}; + +struct SK_API SkV3 { + float x, y, z; + + bool operator==(const SkV3& v) const { + return x == v.x && y == v.y && z == v.z; + } + bool operator!=(const SkV3& v) const { return !(*this == v); } + + static SkScalar Dot(const SkV3& a, const SkV3& b) { return a.x*b.x + a.y*b.y + a.z*b.z; } + static SkV3 Cross(const SkV3& a, const SkV3& b) { + return { a.y*b.z - a.z*b.y, a.z*b.x - a.x*b.z, a.x*b.y - a.y*b.x }; + } + static SkV3 Normalize(const SkV3& v) { return v * (1.0f / v.length()); } + + SkV3 operator-() const { return {-x, -y, -z}; } + SkV3 operator+(const SkV3& v) const { return { x + v.x, y + v.y, z + v.z }; } + SkV3 operator-(const SkV3& v) const { return { x - v.x, y - v.y, z - v.z }; } + + SkV3 operator*(const SkV3& v) const { + return { x*v.x, y*v.y, z*v.z }; + } + friend SkV3 operator*(const SkV3& v, SkScalar s) { + return { v.x*s, v.y*s, v.z*s }; + } + friend SkV3 operator*(SkScalar s, const SkV3& v) { return v*s; } + + void operator+=(SkV3 v) { *this = *this + v; } + void operator-=(SkV3 v) { *this = *this - v; } + void operator*=(SkV3 v) { *this = *this * v; } + void operator*=(SkScalar s) { *this = *this * s; } + + SkScalar lengthSquared() const { return Dot(*this, *this); } + SkScalar length() const { return SkScalarSqrt(Dot(*this, *this)); } + + SkScalar dot(const SkV3& v) const { return Dot(*this, v); } + SkV3 cross(const SkV3& v) const { return Cross(*this, v); } + SkV3 normalize() const { return Normalize(*this); } + + const float* ptr() const { return &x; } + float* ptr() { return &x; } +}; + +struct SK_API SkV4 { + float x, y, z, w; + + bool operator==(const SkV4& v) const { + return x == v.x && y == v.y && z == v.z && w == v.w; + } + bool operator!=(const SkV4& v) const { return !(*this == v); } + + static SkScalar Dot(const SkV4& a, const SkV4& b) { + return a.x*b.x + a.y*b.y + a.z*b.z + a.w*b.w; + } + static SkV4 Normalize(const SkV4& v) { return v * (1.0f / v.length()); } + + SkV4 operator-() const { return {-x, -y, -z, -w}; } + SkV4 operator+(const SkV4& v) const { return { x + v.x, y + v.y, z + v.z, w + v.w }; } + SkV4 operator-(const SkV4& v) const { return { x - v.x, y - v.y, z - v.z, w - v.w }; } + + SkV4 operator*(const SkV4& v) const { + return { x*v.x, y*v.y, z*v.z, w*v.w }; + } + friend SkV4 operator*(const SkV4& v, SkScalar s) { + return { v.x*s, v.y*s, v.z*s, v.w*s }; + } + friend SkV4 operator*(SkScalar s, const SkV4& v) { return v*s; } + + SkScalar lengthSquared() const { return Dot(*this, *this); } + SkScalar length() const { return SkScalarSqrt(Dot(*this, *this)); } + + SkScalar dot(const SkV4& v) const { return Dot(*this, v); } + SkV4 normalize() const { return Normalize(*this); } + + const float* ptr() const { return &x; } + float* ptr() { return &x; } + + float operator[](int i) const { + SkASSERT(i >= 0 && i < 4); + return this->ptr()[i]; + } + float& operator[](int i) { + SkASSERT(i >= 0 && i < 4); + return this->ptr()[i]; + } +}; + +/** + * 4x4 matrix used by SkCanvas and other parts of Skia. + * + * Skia assumes a right-handed coordinate system: + * +X goes to the right + * +Y goes down + * +Z goes into the screen (away from the viewer) + */ +class SK_API SkM44 { +public: + SkM44(const SkM44& src) = default; + SkM44& operator=(const SkM44& src) = default; + + constexpr SkM44() + : fMat{1, 0, 0, 0, + 0, 1, 0, 0, + 0, 0, 1, 0, + 0, 0, 0, 1} + {} + + SkM44(const SkM44& a, const SkM44& b) { + this->setConcat(a, b); + } + + enum Uninitialized_Constructor { + kUninitialized_Constructor + }; + SkM44(Uninitialized_Constructor) {} + + enum NaN_Constructor { + kNaN_Constructor + }; + constexpr SkM44(NaN_Constructor) + : fMat{SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, + SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, + SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, + SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN} + {} + + /** + * The constructor parameters are in row-major order. + */ + constexpr SkM44(SkScalar m0, SkScalar m4, SkScalar m8, SkScalar m12, + SkScalar m1, SkScalar m5, SkScalar m9, SkScalar m13, + SkScalar m2, SkScalar m6, SkScalar m10, SkScalar m14, + SkScalar m3, SkScalar m7, SkScalar m11, SkScalar m15) + // fMat is column-major order in memory. + : fMat{m0, m1, m2, m3, + m4, m5, m6, m7, + m8, m9, m10, m11, + m12, m13, m14, m15} + {} + + static SkM44 Rows(const SkV4& r0, const SkV4& r1, const SkV4& r2, const SkV4& r3) { + SkM44 m(kUninitialized_Constructor); + m.setRow(0, r0); + m.setRow(1, r1); + m.setRow(2, r2); + m.setRow(3, r3); + return m; + } + static SkM44 Cols(const SkV4& c0, const SkV4& c1, const SkV4& c2, const SkV4& c3) { + SkM44 m(kUninitialized_Constructor); + m.setCol(0, c0); + m.setCol(1, c1); + m.setCol(2, c2); + m.setCol(3, c3); + return m; + } + + static SkM44 RowMajor(const SkScalar r[16]) { + return SkM44(r[ 0], r[ 1], r[ 2], r[ 3], + r[ 4], r[ 5], r[ 6], r[ 7], + r[ 8], r[ 9], r[10], r[11], + r[12], r[13], r[14], r[15]); + } + static SkM44 ColMajor(const SkScalar c[16]) { + return SkM44(c[0], c[4], c[ 8], c[12], + c[1], c[5], c[ 9], c[13], + c[2], c[6], c[10], c[14], + c[3], c[7], c[11], c[15]); + } + + static SkM44 Translate(SkScalar x, SkScalar y, SkScalar z = 0) { + return SkM44(1, 0, 0, x, + 0, 1, 0, y, + 0, 0, 1, z, + 0, 0, 0, 1); + } + + static SkM44 Scale(SkScalar x, SkScalar y, SkScalar z = 1) { + return SkM44(x, 0, 0, 0, + 0, y, 0, 0, + 0, 0, z, 0, + 0, 0, 0, 1); + } + + static SkM44 Rotate(SkV3 axis, SkScalar radians) { + SkM44 m(kUninitialized_Constructor); + m.setRotate(axis, radians); + return m; + } + + // Scales and translates 'src' to fill 'dst' exactly. + static SkM44 RectToRect(const SkRect& src, const SkRect& dst); + + static SkM44 LookAt(const SkV3& eye, const SkV3& center, const SkV3& up); + static SkM44 Perspective(float near, float far, float angle); + + bool operator==(const SkM44& other) const; + bool operator!=(const SkM44& other) const { + return !(other == *this); + } + + void getColMajor(SkScalar v[]) const { + memcpy(v, fMat, sizeof(fMat)); + } + void getRowMajor(SkScalar v[]) const; + + SkScalar rc(int r, int c) const { + SkASSERT(r >= 0 && r <= 3); + SkASSERT(c >= 0 && c <= 3); + return fMat[c*4 + r]; + } + void setRC(int r, int c, SkScalar value) { + SkASSERT(r >= 0 && r <= 3); + SkASSERT(c >= 0 && c <= 3); + fMat[c*4 + r] = value; + } + + SkV4 row(int i) const { + SkASSERT(i >= 0 && i <= 3); + return {fMat[i + 0], fMat[i + 4], fMat[i + 8], fMat[i + 12]}; + } + SkV4 col(int i) const { + SkASSERT(i >= 0 && i <= 3); + return {fMat[i*4 + 0], fMat[i*4 + 1], fMat[i*4 + 2], fMat[i*4 + 3]}; + } + + void setRow(int i, const SkV4& v) { + SkASSERT(i >= 0 && i <= 3); + fMat[i + 0] = v.x; + fMat[i + 4] = v.y; + fMat[i + 8] = v.z; + fMat[i + 12] = v.w; + } + void setCol(int i, const SkV4& v) { + SkASSERT(i >= 0 && i <= 3); + memcpy(&fMat[i*4], v.ptr(), sizeof(v)); + } + + SkM44& setIdentity() { + *this = { 1, 0, 0, 0, + 0, 1, 0, 0, + 0, 0, 1, 0, + 0, 0, 0, 1 }; + return *this; + } + + SkM44& setTranslate(SkScalar x, SkScalar y, SkScalar z = 0) { + *this = { 1, 0, 0, x, + 0, 1, 0, y, + 0, 0, 1, z, + 0, 0, 0, 1 }; + return *this; + } + + SkM44& setScale(SkScalar x, SkScalar y, SkScalar z = 1) { + *this = { x, 0, 0, 0, + 0, y, 0, 0, + 0, 0, z, 0, + 0, 0, 0, 1 }; + return *this; + } + + /** + * Set this matrix to rotate about the specified unit-length axis vector, + * by an angle specified by its sin() and cos(). + * + * This does not attempt to verify that axis.length() == 1 or that the sin,cos values + * are correct. + */ + SkM44& setRotateUnitSinCos(SkV3 axis, SkScalar sinAngle, SkScalar cosAngle); + + /** + * Set this matrix to rotate about the specified unit-length axis vector, + * by an angle specified in radians. + * + * This does not attempt to verify that axis.length() == 1. + */ + SkM44& setRotateUnit(SkV3 axis, SkScalar radians) { + return this->setRotateUnitSinCos(axis, SkScalarSin(radians), SkScalarCos(radians)); + } + + /** + * Set this matrix to rotate about the specified axis vector, + * by an angle specified in radians. + * + * Note: axis is not assumed to be unit-length, so it will be normalized internally. + * If axis is already unit-length, call setRotateAboutUnitRadians() instead. + */ + SkM44& setRotate(SkV3 axis, SkScalar radians); + + SkM44& setConcat(const SkM44& a, const SkM44& b); + + friend SkM44 operator*(const SkM44& a, const SkM44& b) { + return SkM44(a, b); + } + + SkM44& preConcat(const SkM44& m) { + return this->setConcat(*this, m); + } + + SkM44& postConcat(const SkM44& m) { + return this->setConcat(m, *this); + } + + /** + * A matrix is categorized as 'perspective' if the bottom row is not [0, 0, 0, 1]. + * For most uses, a bottom row of [0, 0, 0, X] behaves like a non-perspective matrix, though + * it will be categorized as perspective. Calling normalizePerspective() will change the + * matrix such that, if its bottom row was [0, 0, 0, X], it will be changed to [0, 0, 0, 1] + * by scaling the rest of the matrix by 1/X. + * + * | A B C D | | A/X B/X C/X D/X | + * | E F G H | -> | E/X F/X G/X H/X | for X != 0 + * | I J K L | | I/X J/X K/X L/X | + * | 0 0 0 X | | 0 0 0 1 | + */ + void normalizePerspective(); + + /** Returns true if all elements of the matrix are finite. Returns false if any + element is infinity, or NaN. + + @return true if matrix has only finite elements + */ + bool isFinite() const { return SkScalarsAreFinite(fMat, 16); } + + /** If this is invertible, return that in inverse and return true. If it is + * not invertible, return false and leave the inverse parameter unchanged. + */ + bool SK_WARN_UNUSED_RESULT invert(SkM44* inverse) const; + + SkM44 SK_WARN_UNUSED_RESULT transpose() const; + + void dump() const; + + //////////// + + SkV4 map(float x, float y, float z, float w) const; + SkV4 operator*(const SkV4& v) const { + return this->map(v.x, v.y, v.z, v.w); + } + SkV3 operator*(SkV3 v) const { + auto v4 = this->map(v.x, v.y, v.z, 0); + return {v4.x, v4.y, v4.z}; + } + ////////////////////// Converting to/from SkMatrix + + /* When converting from SkM44 to SkMatrix, the third row and + * column is dropped. When converting from SkMatrix to SkM44 + * the third row and column remain as identity: + * [ a b c ] [ a b 0 c ] + * [ d e f ] -> [ d e 0 f ] + * [ g h i ] [ 0 0 1 0 ] + * [ g h 0 i ] + */ + SkMatrix asM33() const { + return SkMatrix::MakeAll(fMat[0], fMat[4], fMat[12], + fMat[1], fMat[5], fMat[13], + fMat[3], fMat[7], fMat[15]); + } + + explicit SkM44(const SkMatrix& src) + : SkM44(src[SkMatrix::kMScaleX], src[SkMatrix::kMSkewX], 0, src[SkMatrix::kMTransX], + src[SkMatrix::kMSkewY], src[SkMatrix::kMScaleY], 0, src[SkMatrix::kMTransY], + 0, 0, 1, 0, + src[SkMatrix::kMPersp0], src[SkMatrix::kMPersp1], 0, src[SkMatrix::kMPersp2]) + {} + + SkM44& preTranslate(SkScalar x, SkScalar y, SkScalar z = 0); + SkM44& postTranslate(SkScalar x, SkScalar y, SkScalar z = 0); + + SkM44& preScale(SkScalar x, SkScalar y); + SkM44& preScale(SkScalar x, SkScalar y, SkScalar z); + SkM44& preConcat(const SkMatrix&); + +private: + /* Stored in column-major. + * Indices + * 0 4 8 12 1 0 0 trans_x + * 1 5 9 13 e.g. 0 1 0 trans_y + * 2 6 10 14 0 0 1 trans_z + * 3 7 11 15 0 0 0 1 + */ + SkScalar fMat[16]; + + friend class SkMatrixPriv; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkMallocPixelRef.h b/gfx/skia/skia/include/core/SkMallocPixelRef.h new file mode 100644 index 0000000000..cce54b50f4 --- /dev/null +++ b/gfx/skia/skia/include/core/SkMallocPixelRef.h @@ -0,0 +1,42 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMallocPixelRef_DEFINED +#define SkMallocPixelRef_DEFINED + +#include "include/core/SkPixelRef.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +class SkData; +struct SkImageInfo; + +/** We explicitly use the same allocator for our pixels that SkMask does, + so that we can freely assign memory allocated by one class to the other. +*/ +namespace SkMallocPixelRef { + /** + * Return a new SkMallocPixelRef, automatically allocating storage for the + * pixels. If rowBytes are 0, an optimal value will be chosen automatically. + * If rowBytes is > 0, then it will be respected, or NULL will be returned + * if rowBytes is invalid for the specified info. + * + * All pixel bytes are zeroed. + * + * Returns NULL on failure. + */ + SK_API sk_sp MakeAllocate(const SkImageInfo&, size_t rowBytes); + + /** + * Return a new SkMallocPixelRef that will use the provided SkData and + * rowBytes as pixel storage. The SkData will be ref()ed and on + * destruction of the PixelRef, the SkData will be unref()ed. + * + * Returns NULL on failure. + */ + SK_API sk_sp MakeWithData(const SkImageInfo&, size_t rowBytes, sk_sp data); +} // namespace SkMallocPixelRef +#endif diff --git a/gfx/skia/skia/include/core/SkMaskFilter.h b/gfx/skia/skia/include/core/SkMaskFilter.h new file mode 100644 index 0000000000..9d03e98c0c --- /dev/null +++ b/gfx/skia/skia/include/core/SkMaskFilter.h @@ -0,0 +1,53 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMaskFilter_DEFINED +#define SkMaskFilter_DEFINED + +#include "include/core/SkFlattenable.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +#include + +enum SkBlurStyle : int; +struct SkDeserialProcs; +struct SkRect; + +/** \class SkMaskFilter + + SkMaskFilter is the base class for object that perform transformations on + the mask before drawing it. An example subclass is Blur. +*/ +class SK_API SkMaskFilter : public SkFlattenable { +public: + /** Create a blur maskfilter. + * @param style The SkBlurStyle to use + * @param sigma Standard deviation of the Gaussian blur to apply. Must be > 0. + * @param respectCTM if true the blur's sigma is modified by the CTM. + * @return The new blur maskfilter + */ + static sk_sp MakeBlur(SkBlurStyle style, SkScalar sigma, + bool respectCTM = true); + + /** + * Returns the approximate bounds that would result from filtering the src rect. + * The actual result may be different, but it should be contained within the + * returned bounds. + */ + SkRect approximateFilteredBounds(const SkRect& src) const; + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr); + +private: + static void RegisterFlattenables(); + friend class SkFlattenable; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkMatrix.h b/gfx/skia/skia/include/core/SkMatrix.h new file mode 100644 index 0000000000..cf84d26228 --- /dev/null +++ b/gfx/skia/skia/include/core/SkMatrix.h @@ -0,0 +1,1996 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMatrix_DEFINED +#define SkMatrix_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTo.h" + +#include +#include + +struct SkPoint3; +struct SkRSXform; +struct SkSize; + +// Remove when clients are updated to live without this +#define SK_SUPPORT_LEGACY_MATRIX_RECTTORECT + +/** + * When we transform points through a matrix containing perspective (the bottom row is something + * other than 0,0,1), the bruteforce math can produce confusing results (since we might divide + * by 0, or a negative w value). By default, methods that map rects and paths will apply + * perspective clipping, but this can be changed by specifying kYes to those methods. + */ +enum class SkApplyPerspectiveClip { + kNo, //!< Don't pre-clip the geometry before applying the (perspective) matrix + kYes, //!< Do pre-clip the geometry before applying the (perspective) matrix +}; + +/** \class SkMatrix + SkMatrix holds a 3x3 matrix for transforming coordinates. This allows mapping + SkPoint and vectors with translation, scaling, skewing, rotation, and + perspective. + + SkMatrix elements are in row major order. + SkMatrix constexpr default constructs to identity. + + SkMatrix includes a hidden variable that classifies the type of matrix to + improve performance. SkMatrix is not thread safe unless getType() is called first. + + example: https://fiddle.skia.org/c/@Matrix_063 +*/ +SK_BEGIN_REQUIRE_DENSE +class SK_API SkMatrix { +public: + + /** Creates an identity SkMatrix: + + | 1 0 0 | + | 0 1 0 | + | 0 0 1 | + */ + constexpr SkMatrix() : SkMatrix(1,0,0, 0,1,0, 0,0,1, kIdentity_Mask | kRectStaysRect_Mask) {} + + /** Sets SkMatrix to scale by (sx, sy). Returned matrix is: + + | sx 0 0 | + | 0 sy 0 | + | 0 0 1 | + + @param sx horizontal scale factor + @param sy vertical scale factor + @return SkMatrix with scale + */ + static SkMatrix SK_WARN_UNUSED_RESULT Scale(SkScalar sx, SkScalar sy) { + SkMatrix m; + m.setScale(sx, sy); + return m; + } + + /** Sets SkMatrix to translate by (dx, dy). Returned matrix is: + + | 1 0 dx | + | 0 1 dy | + | 0 0 1 | + + @param dx horizontal translation + @param dy vertical translation + @return SkMatrix with translation + */ + static SkMatrix SK_WARN_UNUSED_RESULT Translate(SkScalar dx, SkScalar dy) { + SkMatrix m; + m.setTranslate(dx, dy); + return m; + } + static SkMatrix SK_WARN_UNUSED_RESULT Translate(SkVector t) { return Translate(t.x(), t.y()); } + static SkMatrix SK_WARN_UNUSED_RESULT Translate(SkIVector t) { return Translate(t.x(), t.y()); } + + /** Sets SkMatrix to rotate by |deg| about a pivot point at (0, 0). + + @param deg rotation angle in degrees (positive rotates clockwise) + @return SkMatrix with rotation + */ + static SkMatrix SK_WARN_UNUSED_RESULT RotateDeg(SkScalar deg) { + SkMatrix m; + m.setRotate(deg); + return m; + } + static SkMatrix SK_WARN_UNUSED_RESULT RotateDeg(SkScalar deg, SkPoint pt) { + SkMatrix m; + m.setRotate(deg, pt.x(), pt.y()); + return m; + } + static SkMatrix SK_WARN_UNUSED_RESULT RotateRad(SkScalar rad) { + return RotateDeg(SkRadiansToDegrees(rad)); + } + + /** Sets SkMatrix to skew by (kx, ky) about pivot point (0, 0). + + @param kx horizontal skew factor + @param ky vertical skew factor + @return SkMatrix with skew + */ + static SkMatrix SK_WARN_UNUSED_RESULT Skew(SkScalar kx, SkScalar ky) { + SkMatrix m; + m.setSkew(kx, ky); + return m; + } + + /** \enum SkMatrix::ScaleToFit + ScaleToFit describes how SkMatrix is constructed to map one SkRect to another. + ScaleToFit may allow SkMatrix to have unequal horizontal and vertical scaling, + or may restrict SkMatrix to square scaling. If restricted, ScaleToFit specifies + how SkMatrix maps to the side or center of the destination SkRect. + */ + enum ScaleToFit { + kFill_ScaleToFit, //!< scales in x and y to fill destination SkRect + kStart_ScaleToFit, //!< scales and aligns to left and top + kCenter_ScaleToFit, //!< scales and aligns to center + kEnd_ScaleToFit, //!< scales and aligns to right and bottom + }; + + /** Returns SkMatrix set to scale and translate src to dst. ScaleToFit selects + whether mapping completely fills dst or preserves the aspect ratio, and how to + align src within dst. Returns the identity SkMatrix if src is empty. If dst is + empty, returns SkMatrix set to: + + | 0 0 0 | + | 0 0 0 | + | 0 0 1 | + + @param src SkRect to map from + @param dst SkRect to map to + @param mode How to handle the mapping + @return SkMatrix mapping src to dst + */ + static SkMatrix SK_WARN_UNUSED_RESULT RectToRect(const SkRect& src, const SkRect& dst, + ScaleToFit mode = kFill_ScaleToFit) { + return MakeRectToRect(src, dst, mode); + } + + /** Sets SkMatrix to: + + | scaleX skewX transX | + | skewY scaleY transY | + | pers0 pers1 pers2 | + + @param scaleX horizontal scale factor + @param skewX horizontal skew factor + @param transX horizontal translation + @param skewY vertical skew factor + @param scaleY vertical scale factor + @param transY vertical translation + @param pers0 input x-axis perspective factor + @param pers1 input y-axis perspective factor + @param pers2 perspective scale factor + @return SkMatrix constructed from parameters + */ + static SkMatrix SK_WARN_UNUSED_RESULT MakeAll(SkScalar scaleX, SkScalar skewX, SkScalar transX, + SkScalar skewY, SkScalar scaleY, SkScalar transY, + SkScalar pers0, SkScalar pers1, SkScalar pers2) { + SkMatrix m; + m.setAll(scaleX, skewX, transX, skewY, scaleY, transY, pers0, pers1, pers2); + return m; + } + + /** \enum SkMatrix::TypeMask + Enum of bit fields for mask returned by getType(). + Used to identify the complexity of SkMatrix, to optimize performance. + */ + enum TypeMask { + kIdentity_Mask = 0, //!< identity SkMatrix; all bits clear + kTranslate_Mask = 0x01, //!< translation SkMatrix + kScale_Mask = 0x02, //!< scale SkMatrix + kAffine_Mask = 0x04, //!< skew or rotate SkMatrix + kPerspective_Mask = 0x08, //!< perspective SkMatrix + }; + + /** Returns a bit field describing the transformations the matrix may + perform. The bit field is computed conservatively, so it may include + false positives. For example, when kPerspective_Mask is set, all + other bits are set. + + @return kIdentity_Mask, or combinations of: kTranslate_Mask, kScale_Mask, + kAffine_Mask, kPerspective_Mask + */ + TypeMask getType() const { + if (fTypeMask & kUnknown_Mask) { + fTypeMask = this->computeTypeMask(); + } + // only return the public masks + return (TypeMask)(fTypeMask & 0xF); + } + + /** Returns true if SkMatrix is identity. Identity matrix is: + + | 1 0 0 | + | 0 1 0 | + | 0 0 1 | + + @return true if SkMatrix has no effect + */ + bool isIdentity() const { + return this->getType() == 0; + } + + /** Returns true if SkMatrix at most scales and translates. SkMatrix may be identity, + contain only scale elements, only translate elements, or both. SkMatrix form is: + + | scale-x 0 translate-x | + | 0 scale-y translate-y | + | 0 0 1 | + + @return true if SkMatrix is identity; or scales, translates, or both + */ + bool isScaleTranslate() const { + return !(this->getType() & ~(kScale_Mask | kTranslate_Mask)); + } + + /** Returns true if SkMatrix is identity, or translates. SkMatrix form is: + + | 1 0 translate-x | + | 0 1 translate-y | + | 0 0 1 | + + @return true if SkMatrix is identity, or translates + */ + bool isTranslate() const { return !(this->getType() & ~(kTranslate_Mask)); } + + /** Returns true SkMatrix maps SkRect to another SkRect. If true, SkMatrix is identity, + or scales, or rotates a multiple of 90 degrees, or mirrors on axes. In all + cases, SkMatrix may also have translation. SkMatrix form is either: + + | scale-x 0 translate-x | + | 0 scale-y translate-y | + | 0 0 1 | + + or + + | 0 rotate-x translate-x | + | rotate-y 0 translate-y | + | 0 0 1 | + + for non-zero values of scale-x, scale-y, rotate-x, and rotate-y. + + Also called preservesAxisAlignment(); use the one that provides better inline + documentation. + + @return true if SkMatrix maps one SkRect into another + */ + bool rectStaysRect() const { + if (fTypeMask & kUnknown_Mask) { + fTypeMask = this->computeTypeMask(); + } + return (fTypeMask & kRectStaysRect_Mask) != 0; + } + + /** Returns true SkMatrix maps SkRect to another SkRect. If true, SkMatrix is identity, + or scales, or rotates a multiple of 90 degrees, or mirrors on axes. In all + cases, SkMatrix may also have translation. SkMatrix form is either: + + | scale-x 0 translate-x | + | 0 scale-y translate-y | + | 0 0 1 | + + or + + | 0 rotate-x translate-x | + | rotate-y 0 translate-y | + | 0 0 1 | + + for non-zero values of scale-x, scale-y, rotate-x, and rotate-y. + + Also called rectStaysRect(); use the one that provides better inline + documentation. + + @return true if SkMatrix maps one SkRect into another + */ + bool preservesAxisAlignment() const { return this->rectStaysRect(); } + + /** Returns true if the matrix contains perspective elements. SkMatrix form is: + + | -- -- -- | + | -- -- -- | + | perspective-x perspective-y perspective-scale | + + where perspective-x or perspective-y is non-zero, or perspective-scale is + not one. All other elements may have any value. + + @return true if SkMatrix is in most general form + */ + bool hasPerspective() const { + return SkToBool(this->getPerspectiveTypeMaskOnly() & + kPerspective_Mask); + } + + /** Returns true if SkMatrix contains only translation, rotation, reflection, and + uniform scale. + Returns false if SkMatrix contains different scales, skewing, perspective, or + degenerate forms that collapse to a line or point. + + Describes that the SkMatrix makes rendering with and without the matrix are + visually alike; a transformed circle remains a circle. Mathematically, this is + referred to as similarity of a Euclidean space, or a similarity transformation. + + Preserves right angles, keeping the arms of the angle equal lengths. + + @param tol to be deprecated + @return true if SkMatrix only rotates, uniformly scales, translates + + example: https://fiddle.skia.org/c/@Matrix_isSimilarity + */ + bool isSimilarity(SkScalar tol = SK_ScalarNearlyZero) const; + + /** Returns true if SkMatrix contains only translation, rotation, reflection, and + scale. Scale may differ along rotated axes. + Returns false if SkMatrix skewing, perspective, or degenerate forms that collapse + to a line or point. + + Preserves right angles, but not requiring that the arms of the angle + retain equal lengths. + + @param tol to be deprecated + @return true if SkMatrix only rotates, scales, translates + + example: https://fiddle.skia.org/c/@Matrix_preservesRightAngles + */ + bool preservesRightAngles(SkScalar tol = SK_ScalarNearlyZero) const; + + /** SkMatrix organizes its values in row-major order. These members correspond to + each value in SkMatrix. + */ + static constexpr int kMScaleX = 0; //!< horizontal scale factor + static constexpr int kMSkewX = 1; //!< horizontal skew factor + static constexpr int kMTransX = 2; //!< horizontal translation + static constexpr int kMSkewY = 3; //!< vertical skew factor + static constexpr int kMScaleY = 4; //!< vertical scale factor + static constexpr int kMTransY = 5; //!< vertical translation + static constexpr int kMPersp0 = 6; //!< input x perspective factor + static constexpr int kMPersp1 = 7; //!< input y perspective factor + static constexpr int kMPersp2 = 8; //!< perspective bias + + /** Affine arrays are in column-major order to match the matrix used by + PDF and XPS. + */ + static constexpr int kAScaleX = 0; //!< horizontal scale factor + static constexpr int kASkewY = 1; //!< vertical skew factor + static constexpr int kASkewX = 2; //!< horizontal skew factor + static constexpr int kAScaleY = 3; //!< vertical scale factor + static constexpr int kATransX = 4; //!< horizontal translation + static constexpr int kATransY = 5; //!< vertical translation + + /** Returns one matrix value. Asserts if index is out of range and SK_DEBUG is + defined. + + @param index one of: kMScaleX, kMSkewX, kMTransX, kMSkewY, kMScaleY, kMTransY, + kMPersp0, kMPersp1, kMPersp2 + @return value corresponding to index + */ + SkScalar operator[](int index) const { + SkASSERT((unsigned)index < 9); + return fMat[index]; + } + + /** Returns one matrix value. Asserts if index is out of range and SK_DEBUG is + defined. + + @param index one of: kMScaleX, kMSkewX, kMTransX, kMSkewY, kMScaleY, kMTransY, + kMPersp0, kMPersp1, kMPersp2 + @return value corresponding to index + */ + SkScalar get(int index) const { + SkASSERT((unsigned)index < 9); + return fMat[index]; + } + + /** Returns one matrix value from a particular row/column. Asserts if index is out + of range and SK_DEBUG is defined. + + @param r matrix row to fetch + @param c matrix column to fetch + @return value at the given matrix position + */ + SkScalar rc(int r, int c) const { + SkASSERT(r >= 0 && r <= 2); + SkASSERT(c >= 0 && c <= 2); + return fMat[r*3 + c]; + } + + /** Returns scale factor multiplied by x-axis input, contributing to x-axis output. + With mapPoints(), scales SkPoint along the x-axis. + + @return horizontal scale factor + */ + SkScalar getScaleX() const { return fMat[kMScaleX]; } + + /** Returns scale factor multiplied by y-axis input, contributing to y-axis output. + With mapPoints(), scales SkPoint along the y-axis. + + @return vertical scale factor + */ + SkScalar getScaleY() const { return fMat[kMScaleY]; } + + /** Returns scale factor multiplied by x-axis input, contributing to y-axis output. + With mapPoints(), skews SkPoint along the y-axis. + Skewing both axes can rotate SkPoint. + + @return vertical skew factor + */ + SkScalar getSkewY() const { return fMat[kMSkewY]; } + + /** Returns scale factor multiplied by y-axis input, contributing to x-axis output. + With mapPoints(), skews SkPoint along the x-axis. + Skewing both axes can rotate SkPoint. + + @return horizontal scale factor + */ + SkScalar getSkewX() const { return fMat[kMSkewX]; } + + /** Returns translation contributing to x-axis output. + With mapPoints(), moves SkPoint along the x-axis. + + @return horizontal translation factor + */ + SkScalar getTranslateX() const { return fMat[kMTransX]; } + + /** Returns translation contributing to y-axis output. + With mapPoints(), moves SkPoint along the y-axis. + + @return vertical translation factor + */ + SkScalar getTranslateY() const { return fMat[kMTransY]; } + + /** Returns factor scaling input x-axis relative to input y-axis. + + @return input x-axis perspective factor + */ + SkScalar getPerspX() const { return fMat[kMPersp0]; } + + /** Returns factor scaling input y-axis relative to input x-axis. + + @return input y-axis perspective factor + */ + SkScalar getPerspY() const { return fMat[kMPersp1]; } + + /** Returns writable SkMatrix value. Asserts if index is out of range and SK_DEBUG is + defined. Clears internal cache anticipating that caller will change SkMatrix value. + + Next call to read SkMatrix state may recompute cache; subsequent writes to SkMatrix + value must be followed by dirtyMatrixTypeCache(). + + @param index one of: kMScaleX, kMSkewX, kMTransX, kMSkewY, kMScaleY, kMTransY, + kMPersp0, kMPersp1, kMPersp2 + @return writable value corresponding to index + */ + SkScalar& operator[](int index) { + SkASSERT((unsigned)index < 9); + this->setTypeMask(kUnknown_Mask); + return fMat[index]; + } + + /** Sets SkMatrix value. Asserts if index is out of range and SK_DEBUG is + defined. Safer than operator[]; internal cache is always maintained. + + @param index one of: kMScaleX, kMSkewX, kMTransX, kMSkewY, kMScaleY, kMTransY, + kMPersp0, kMPersp1, kMPersp2 + @param value scalar to store in SkMatrix + */ + SkMatrix& set(int index, SkScalar value) { + SkASSERT((unsigned)index < 9); + fMat[index] = value; + this->setTypeMask(kUnknown_Mask); + return *this; + } + + /** Sets horizontal scale factor. + + @param v horizontal scale factor to store + */ + SkMatrix& setScaleX(SkScalar v) { return this->set(kMScaleX, v); } + + /** Sets vertical scale factor. + + @param v vertical scale factor to store + */ + SkMatrix& setScaleY(SkScalar v) { return this->set(kMScaleY, v); } + + /** Sets vertical skew factor. + + @param v vertical skew factor to store + */ + SkMatrix& setSkewY(SkScalar v) { return this->set(kMSkewY, v); } + + /** Sets horizontal skew factor. + + @param v horizontal skew factor to store + */ + SkMatrix& setSkewX(SkScalar v) { return this->set(kMSkewX, v); } + + /** Sets horizontal translation. + + @param v horizontal translation to store + */ + SkMatrix& setTranslateX(SkScalar v) { return this->set(kMTransX, v); } + + /** Sets vertical translation. + + @param v vertical translation to store + */ + SkMatrix& setTranslateY(SkScalar v) { return this->set(kMTransY, v); } + + /** Sets input x-axis perspective factor, which causes mapXY() to vary input x-axis values + inversely proportional to input y-axis values. + + @param v perspective factor + */ + SkMatrix& setPerspX(SkScalar v) { return this->set(kMPersp0, v); } + + /** Sets input y-axis perspective factor, which causes mapXY() to vary input y-axis values + inversely proportional to input x-axis values. + + @param v perspective factor + */ + SkMatrix& setPerspY(SkScalar v) { return this->set(kMPersp1, v); } + + /** Sets all values from parameters. Sets matrix to: + + | scaleX skewX transX | + | skewY scaleY transY | + | persp0 persp1 persp2 | + + @param scaleX horizontal scale factor to store + @param skewX horizontal skew factor to store + @param transX horizontal translation to store + @param skewY vertical skew factor to store + @param scaleY vertical scale factor to store + @param transY vertical translation to store + @param persp0 input x-axis values perspective factor to store + @param persp1 input y-axis values perspective factor to store + @param persp2 perspective scale factor to store + */ + SkMatrix& setAll(SkScalar scaleX, SkScalar skewX, SkScalar transX, + SkScalar skewY, SkScalar scaleY, SkScalar transY, + SkScalar persp0, SkScalar persp1, SkScalar persp2) { + fMat[kMScaleX] = scaleX; + fMat[kMSkewX] = skewX; + fMat[kMTransX] = transX; + fMat[kMSkewY] = skewY; + fMat[kMScaleY] = scaleY; + fMat[kMTransY] = transY; + fMat[kMPersp0] = persp0; + fMat[kMPersp1] = persp1; + fMat[kMPersp2] = persp2; + this->setTypeMask(kUnknown_Mask); + return *this; + } + + /** Copies nine scalar values contained by SkMatrix into buffer, in member value + ascending order: kMScaleX, kMSkewX, kMTransX, kMSkewY, kMScaleY, kMTransY, + kMPersp0, kMPersp1, kMPersp2. + + @param buffer storage for nine scalar values + */ + void get9(SkScalar buffer[9]) const { + memcpy(buffer, fMat, 9 * sizeof(SkScalar)); + } + + /** Sets SkMatrix to nine scalar values in buffer, in member value ascending order: + kMScaleX, kMSkewX, kMTransX, kMSkewY, kMScaleY, kMTransY, kMPersp0, kMPersp1, + kMPersp2. + + Sets matrix to: + + | buffer[0] buffer[1] buffer[2] | + | buffer[3] buffer[4] buffer[5] | + | buffer[6] buffer[7] buffer[8] | + + In the future, set9 followed by get9 may not return the same values. Since SkMatrix + maps non-homogeneous coordinates, scaling all nine values produces an equivalent + transformation, possibly improving precision. + + @param buffer nine scalar values + */ + SkMatrix& set9(const SkScalar buffer[9]); + + /** Sets SkMatrix to identity; which has no effect on mapped SkPoint. Sets SkMatrix to: + + | 1 0 0 | + | 0 1 0 | + | 0 0 1 | + + Also called setIdentity(); use the one that provides better inline + documentation. + */ + SkMatrix& reset(); + + /** Sets SkMatrix to identity; which has no effect on mapped SkPoint. Sets SkMatrix to: + + | 1 0 0 | + | 0 1 0 | + | 0 0 1 | + + Also called reset(); use the one that provides better inline + documentation. + */ + SkMatrix& setIdentity() { return this->reset(); } + + /** Sets SkMatrix to translate by (dx, dy). + + @param dx horizontal translation + @param dy vertical translation + */ + SkMatrix& setTranslate(SkScalar dx, SkScalar dy); + + /** Sets SkMatrix to translate by (v.fX, v.fY). + + @param v vector containing horizontal and vertical translation + */ + SkMatrix& setTranslate(const SkVector& v) { return this->setTranslate(v.fX, v.fY); } + + /** Sets SkMatrix to scale by sx and sy, about a pivot point at (px, py). + The pivot point is unchanged when mapped with SkMatrix. + + @param sx horizontal scale factor + @param sy vertical scale factor + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& setScale(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py); + + /** Sets SkMatrix to scale by sx and sy about at pivot point at (0, 0). + + @param sx horizontal scale factor + @param sy vertical scale factor + */ + SkMatrix& setScale(SkScalar sx, SkScalar sy); + + /** Sets SkMatrix to rotate by degrees about a pivot point at (px, py). + The pivot point is unchanged when mapped with SkMatrix. + + Positive degrees rotates clockwise. + + @param degrees angle of axes relative to upright axes + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& setRotate(SkScalar degrees, SkScalar px, SkScalar py); + + /** Sets SkMatrix to rotate by degrees about a pivot point at (0, 0). + Positive degrees rotates clockwise. + + @param degrees angle of axes relative to upright axes + */ + SkMatrix& setRotate(SkScalar degrees); + + /** Sets SkMatrix to rotate by sinValue and cosValue, about a pivot point at (px, py). + The pivot point is unchanged when mapped with SkMatrix. + + Vector (sinValue, cosValue) describes the angle of rotation relative to (0, 1). + Vector length specifies scale. + + @param sinValue rotation vector x-axis component + @param cosValue rotation vector y-axis component + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& setSinCos(SkScalar sinValue, SkScalar cosValue, + SkScalar px, SkScalar py); + + /** Sets SkMatrix to rotate by sinValue and cosValue, about a pivot point at (0, 0). + + Vector (sinValue, cosValue) describes the angle of rotation relative to (0, 1). + Vector length specifies scale. + + @param sinValue rotation vector x-axis component + @param cosValue rotation vector y-axis component + */ + SkMatrix& setSinCos(SkScalar sinValue, SkScalar cosValue); + + /** Sets SkMatrix to rotate, scale, and translate using a compressed matrix form. + + Vector (rsxForm.fSSin, rsxForm.fSCos) describes the angle of rotation relative + to (0, 1). Vector length specifies scale. Mapped point is rotated and scaled + by vector, then translated by (rsxForm.fTx, rsxForm.fTy). + + @param rsxForm compressed SkRSXform matrix + @return reference to SkMatrix + + example: https://fiddle.skia.org/c/@Matrix_setRSXform + */ + SkMatrix& setRSXform(const SkRSXform& rsxForm); + + /** Sets SkMatrix to skew by kx and ky, about a pivot point at (px, py). + The pivot point is unchanged when mapped with SkMatrix. + + @param kx horizontal skew factor + @param ky vertical skew factor + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& setSkew(SkScalar kx, SkScalar ky, SkScalar px, SkScalar py); + + /** Sets SkMatrix to skew by kx and ky, about a pivot point at (0, 0). + + @param kx horizontal skew factor + @param ky vertical skew factor + */ + SkMatrix& setSkew(SkScalar kx, SkScalar ky); + + /** Sets SkMatrix to SkMatrix a multiplied by SkMatrix b. Either a or b may be this. + + Given: + + | A B C | | J K L | + a = | D E F |, b = | M N O | + | G H I | | P Q R | + + sets SkMatrix to: + + | A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR | + a * b = | D E F | * | M N O | = | DJ+EM+FP DK+EN+FQ DL+EO+FR | + | G H I | | P Q R | | GJ+HM+IP GK+HN+IQ GL+HO+IR | + + @param a SkMatrix on left side of multiply expression + @param b SkMatrix on right side of multiply expression + */ + SkMatrix& setConcat(const SkMatrix& a, const SkMatrix& b); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix constructed from translation (dx, dy). + This can be thought of as moving the point to be mapped before applying SkMatrix. + + Given: + + | A B C | | 1 0 dx | + Matrix = | D E F |, T(dx, dy) = | 0 1 dy | + | G H I | | 0 0 1 | + + sets SkMatrix to: + + | A B C | | 1 0 dx | | A B A*dx+B*dy+C | + Matrix * T(dx, dy) = | D E F | | 0 1 dy | = | D E D*dx+E*dy+F | + | G H I | | 0 0 1 | | G H G*dx+H*dy+I | + + @param dx x-axis translation before applying SkMatrix + @param dy y-axis translation before applying SkMatrix + */ + SkMatrix& preTranslate(SkScalar dx, SkScalar dy); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix constructed from scaling by (sx, sy) + about pivot point (px, py). + This can be thought of as scaling about a pivot point before applying SkMatrix. + + Given: + + | A B C | | sx 0 dx | + Matrix = | D E F |, S(sx, sy, px, py) = | 0 sy dy | + | G H I | | 0 0 1 | + + where + + dx = px - sx * px + dy = py - sy * py + + sets SkMatrix to: + + | A B C | | sx 0 dx | | A*sx B*sy A*dx+B*dy+C | + Matrix * S(sx, sy, px, py) = | D E F | | 0 sy dy | = | D*sx E*sy D*dx+E*dy+F | + | G H I | | 0 0 1 | | G*sx H*sy G*dx+H*dy+I | + + @param sx horizontal scale factor + @param sy vertical scale factor + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& preScale(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix constructed from scaling by (sx, sy) + about pivot point (0, 0). + This can be thought of as scaling about the origin before applying SkMatrix. + + Given: + + | A B C | | sx 0 0 | + Matrix = | D E F |, S(sx, sy) = | 0 sy 0 | + | G H I | | 0 0 1 | + + sets SkMatrix to: + + | A B C | | sx 0 0 | | A*sx B*sy C | + Matrix * S(sx, sy) = | D E F | | 0 sy 0 | = | D*sx E*sy F | + | G H I | | 0 0 1 | | G*sx H*sy I | + + @param sx horizontal scale factor + @param sy vertical scale factor + */ + SkMatrix& preScale(SkScalar sx, SkScalar sy); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix constructed from rotating by degrees + about pivot point (px, py). + This can be thought of as rotating about a pivot point before applying SkMatrix. + + Positive degrees rotates clockwise. + + Given: + + | A B C | | c -s dx | + Matrix = | D E F |, R(degrees, px, py) = | s c dy | + | G H I | | 0 0 1 | + + where + + c = cos(degrees) + s = sin(degrees) + dx = s * py + (1 - c) * px + dy = -s * px + (1 - c) * py + + sets SkMatrix to: + + | A B C | | c -s dx | | Ac+Bs -As+Bc A*dx+B*dy+C | + Matrix * R(degrees, px, py) = | D E F | | s c dy | = | Dc+Es -Ds+Ec D*dx+E*dy+F | + | G H I | | 0 0 1 | | Gc+Hs -Gs+Hc G*dx+H*dy+I | + + @param degrees angle of axes relative to upright axes + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& preRotate(SkScalar degrees, SkScalar px, SkScalar py); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix constructed from rotating by degrees + about pivot point (0, 0). + This can be thought of as rotating about the origin before applying SkMatrix. + + Positive degrees rotates clockwise. + + Given: + + | A B C | | c -s 0 | + Matrix = | D E F |, R(degrees, px, py) = | s c 0 | + | G H I | | 0 0 1 | + + where + + c = cos(degrees) + s = sin(degrees) + + sets SkMatrix to: + + | A B C | | c -s 0 | | Ac+Bs -As+Bc C | + Matrix * R(degrees, px, py) = | D E F | | s c 0 | = | Dc+Es -Ds+Ec F | + | G H I | | 0 0 1 | | Gc+Hs -Gs+Hc I | + + @param degrees angle of axes relative to upright axes + */ + SkMatrix& preRotate(SkScalar degrees); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix constructed from skewing by (kx, ky) + about pivot point (px, py). + This can be thought of as skewing about a pivot point before applying SkMatrix. + + Given: + + | A B C | | 1 kx dx | + Matrix = | D E F |, K(kx, ky, px, py) = | ky 1 dy | + | G H I | | 0 0 1 | + + where + + dx = -kx * py + dy = -ky * px + + sets SkMatrix to: + + | A B C | | 1 kx dx | | A+B*ky A*kx+B A*dx+B*dy+C | + Matrix * K(kx, ky, px, py) = | D E F | | ky 1 dy | = | D+E*ky D*kx+E D*dx+E*dy+F | + | G H I | | 0 0 1 | | G+H*ky G*kx+H G*dx+H*dy+I | + + @param kx horizontal skew factor + @param ky vertical skew factor + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& preSkew(SkScalar kx, SkScalar ky, SkScalar px, SkScalar py); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix constructed from skewing by (kx, ky) + about pivot point (0, 0). + This can be thought of as skewing about the origin before applying SkMatrix. + + Given: + + | A B C | | 1 kx 0 | + Matrix = | D E F |, K(kx, ky) = | ky 1 0 | + | G H I | | 0 0 1 | + + sets SkMatrix to: + + | A B C | | 1 kx 0 | | A+B*ky A*kx+B C | + Matrix * K(kx, ky) = | D E F | | ky 1 0 | = | D+E*ky D*kx+E F | + | G H I | | 0 0 1 | | G+H*ky G*kx+H I | + + @param kx horizontal skew factor + @param ky vertical skew factor + */ + SkMatrix& preSkew(SkScalar kx, SkScalar ky); + + /** Sets SkMatrix to SkMatrix multiplied by SkMatrix other. + This can be thought of mapping by other before applying SkMatrix. + + Given: + + | A B C | | J K L | + Matrix = | D E F |, other = | M N O | + | G H I | | P Q R | + + sets SkMatrix to: + + | A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR | + Matrix * other = | D E F | * | M N O | = | DJ+EM+FP DK+EN+FQ DL+EO+FR | + | G H I | | P Q R | | GJ+HM+IP GK+HN+IQ GL+HO+IR | + + @param other SkMatrix on right side of multiply expression + */ + SkMatrix& preConcat(const SkMatrix& other); + + /** Sets SkMatrix to SkMatrix constructed from translation (dx, dy) multiplied by SkMatrix. + This can be thought of as moving the point to be mapped after applying SkMatrix. + + Given: + + | J K L | | 1 0 dx | + Matrix = | M N O |, T(dx, dy) = | 0 1 dy | + | P Q R | | 0 0 1 | + + sets SkMatrix to: + + | 1 0 dx | | J K L | | J+dx*P K+dx*Q L+dx*R | + T(dx, dy) * Matrix = | 0 1 dy | | M N O | = | M+dy*P N+dy*Q O+dy*R | + | 0 0 1 | | P Q R | | P Q R | + + @param dx x-axis translation after applying SkMatrix + @param dy y-axis translation after applying SkMatrix + */ + SkMatrix& postTranslate(SkScalar dx, SkScalar dy); + + /** Sets SkMatrix to SkMatrix constructed from scaling by (sx, sy) about pivot point + (px, py), multiplied by SkMatrix. + This can be thought of as scaling about a pivot point after applying SkMatrix. + + Given: + + | J K L | | sx 0 dx | + Matrix = | M N O |, S(sx, sy, px, py) = | 0 sy dy | + | P Q R | | 0 0 1 | + + where + + dx = px - sx * px + dy = py - sy * py + + sets SkMatrix to: + + | sx 0 dx | | J K L | | sx*J+dx*P sx*K+dx*Q sx*L+dx+R | + S(sx, sy, px, py) * Matrix = | 0 sy dy | | M N O | = | sy*M+dy*P sy*N+dy*Q sy*O+dy*R | + | 0 0 1 | | P Q R | | P Q R | + + @param sx horizontal scale factor + @param sy vertical scale factor + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& postScale(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py); + + /** Sets SkMatrix to SkMatrix constructed from scaling by (sx, sy) about pivot point + (0, 0), multiplied by SkMatrix. + This can be thought of as scaling about the origin after applying SkMatrix. + + Given: + + | J K L | | sx 0 0 | + Matrix = | M N O |, S(sx, sy) = | 0 sy 0 | + | P Q R | | 0 0 1 | + + sets SkMatrix to: + + | sx 0 0 | | J K L | | sx*J sx*K sx*L | + S(sx, sy) * Matrix = | 0 sy 0 | | M N O | = | sy*M sy*N sy*O | + | 0 0 1 | | P Q R | | P Q R | + + @param sx horizontal scale factor + @param sy vertical scale factor + */ + SkMatrix& postScale(SkScalar sx, SkScalar sy); + + /** Sets SkMatrix to SkMatrix constructed from rotating by degrees about pivot point + (px, py), multiplied by SkMatrix. + This can be thought of as rotating about a pivot point after applying SkMatrix. + + Positive degrees rotates clockwise. + + Given: + + | J K L | | c -s dx | + Matrix = | M N O |, R(degrees, px, py) = | s c dy | + | P Q R | | 0 0 1 | + + where + + c = cos(degrees) + s = sin(degrees) + dx = s * py + (1 - c) * px + dy = -s * px + (1 - c) * py + + sets SkMatrix to: + + |c -s dx| |J K L| |cJ-sM+dx*P cK-sN+dx*Q cL-sO+dx+R| + R(degrees, px, py) * Matrix = |s c dy| |M N O| = |sJ+cM+dy*P sK+cN+dy*Q sL+cO+dy*R| + |0 0 1| |P Q R| | P Q R| + + @param degrees angle of axes relative to upright axes + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& postRotate(SkScalar degrees, SkScalar px, SkScalar py); + + /** Sets SkMatrix to SkMatrix constructed from rotating by degrees about pivot point + (0, 0), multiplied by SkMatrix. + This can be thought of as rotating about the origin after applying SkMatrix. + + Positive degrees rotates clockwise. + + Given: + + | J K L | | c -s 0 | + Matrix = | M N O |, R(degrees, px, py) = | s c 0 | + | P Q R | | 0 0 1 | + + where + + c = cos(degrees) + s = sin(degrees) + + sets SkMatrix to: + + | c -s dx | | J K L | | cJ-sM cK-sN cL-sO | + R(degrees, px, py) * Matrix = | s c dy | | M N O | = | sJ+cM sK+cN sL+cO | + | 0 0 1 | | P Q R | | P Q R | + + @param degrees angle of axes relative to upright axes + */ + SkMatrix& postRotate(SkScalar degrees); + + /** Sets SkMatrix to SkMatrix constructed from skewing by (kx, ky) about pivot point + (px, py), multiplied by SkMatrix. + This can be thought of as skewing about a pivot point after applying SkMatrix. + + Given: + + | J K L | | 1 kx dx | + Matrix = | M N O |, K(kx, ky, px, py) = | ky 1 dy | + | P Q R | | 0 0 1 | + + where + + dx = -kx * py + dy = -ky * px + + sets SkMatrix to: + + | 1 kx dx| |J K L| |J+kx*M+dx*P K+kx*N+dx*Q L+kx*O+dx+R| + K(kx, ky, px, py) * Matrix = |ky 1 dy| |M N O| = |ky*J+M+dy*P ky*K+N+dy*Q ky*L+O+dy*R| + | 0 0 1| |P Q R| | P Q R| + + @param kx horizontal skew factor + @param ky vertical skew factor + @param px pivot on x-axis + @param py pivot on y-axis + */ + SkMatrix& postSkew(SkScalar kx, SkScalar ky, SkScalar px, SkScalar py); + + /** Sets SkMatrix to SkMatrix constructed from skewing by (kx, ky) about pivot point + (0, 0), multiplied by SkMatrix. + This can be thought of as skewing about the origin after applying SkMatrix. + + Given: + + | J K L | | 1 kx 0 | + Matrix = | M N O |, K(kx, ky) = | ky 1 0 | + | P Q R | | 0 0 1 | + + sets SkMatrix to: + + | 1 kx 0 | | J K L | | J+kx*M K+kx*N L+kx*O | + K(kx, ky) * Matrix = | ky 1 0 | | M N O | = | ky*J+M ky*K+N ky*L+O | + | 0 0 1 | | P Q R | | P Q R | + + @param kx horizontal skew factor + @param ky vertical skew factor + */ + SkMatrix& postSkew(SkScalar kx, SkScalar ky); + + /** Sets SkMatrix to SkMatrix other multiplied by SkMatrix. + This can be thought of mapping by other after applying SkMatrix. + + Given: + + | J K L | | A B C | + Matrix = | M N O |, other = | D E F | + | P Q R | | G H I | + + sets SkMatrix to: + + | A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR | + other * Matrix = | D E F | * | M N O | = | DJ+EM+FP DK+EN+FQ DL+EO+FR | + | G H I | | P Q R | | GJ+HM+IP GK+HN+IQ GL+HO+IR | + + @param other SkMatrix on left side of multiply expression + */ + SkMatrix& postConcat(const SkMatrix& other); + +#ifndef SK_SUPPORT_LEGACY_MATRIX_RECTTORECT +private: +#endif + /** Sets SkMatrix to scale and translate src SkRect to dst SkRect. stf selects whether + mapping completely fills dst or preserves the aspect ratio, and how to align + src within dst. Returns false if src is empty, and sets SkMatrix to identity. + Returns true if dst is empty, and sets SkMatrix to: + + | 0 0 0 | + | 0 0 0 | + | 0 0 1 | + + @param src SkRect to map from + @param dst SkRect to map to + @return true if SkMatrix can represent SkRect mapping + + example: https://fiddle.skia.org/c/@Matrix_setRectToRect + */ + bool setRectToRect(const SkRect& src, const SkRect& dst, ScaleToFit stf); + + /** Returns SkMatrix set to scale and translate src SkRect to dst SkRect. stf selects + whether mapping completely fills dst or preserves the aspect ratio, and how to + align src within dst. Returns the identity SkMatrix if src is empty. If dst is + empty, returns SkMatrix set to: + + | 0 0 0 | + | 0 0 0 | + | 0 0 1 | + + @param src SkRect to map from + @param dst SkRect to map to + @return SkMatrix mapping src to dst + */ + static SkMatrix MakeRectToRect(const SkRect& src, const SkRect& dst, ScaleToFit stf) { + SkMatrix m; + m.setRectToRect(src, dst, stf); + return m; + } +#ifndef SK_SUPPORT_LEGACY_MATRIX_RECTTORECT +public: +#endif + + /** Sets SkMatrix to map src to dst. count must be zero or greater, and four or less. + + If count is zero, sets SkMatrix to identity and returns true. + If count is one, sets SkMatrix to translate and returns true. + If count is two or more, sets SkMatrix to map SkPoint if possible; returns false + if SkMatrix cannot be constructed. If count is four, SkMatrix may include + perspective. + + @param src SkPoint to map from + @param dst SkPoint to map to + @param count number of SkPoint in src and dst + @return true if SkMatrix was constructed successfully + + example: https://fiddle.skia.org/c/@Matrix_setPolyToPoly + */ + bool setPolyToPoly(const SkPoint src[], const SkPoint dst[], int count); + + /** Sets inverse to reciprocal matrix, returning true if SkMatrix can be inverted. + Geometrically, if SkMatrix maps from source to destination, inverse SkMatrix + maps from destination to source. If SkMatrix can not be inverted, inverse is + unchanged. + + @param inverse storage for inverted SkMatrix; may be nullptr + @return true if SkMatrix can be inverted + */ + bool SK_WARN_UNUSED_RESULT invert(SkMatrix* inverse) const { + // Allow the trivial case to be inlined. + if (this->isIdentity()) { + if (inverse) { + inverse->reset(); + } + return true; + } + return this->invertNonIdentity(inverse); + } + + /** Fills affine with identity values in column major order. + Sets affine to: + + | 1 0 0 | + | 0 1 0 | + + Affine 3 by 2 matrices in column major order are used by OpenGL and XPS. + + @param affine storage for 3 by 2 affine matrix + + example: https://fiddle.skia.org/c/@Matrix_SetAffineIdentity + */ + static void SetAffineIdentity(SkScalar affine[6]); + + /** Fills affine in column major order. Sets affine to: + + | scale-x skew-x translate-x | + | skew-y scale-y translate-y | + + If SkMatrix contains perspective, returns false and leaves affine unchanged. + + @param affine storage for 3 by 2 affine matrix; may be nullptr + @return true if SkMatrix does not contain perspective + */ + bool SK_WARN_UNUSED_RESULT asAffine(SkScalar affine[6]) const; + + /** Sets SkMatrix to affine values, passed in column major order. Given affine, + column, then row, as: + + | scale-x skew-x translate-x | + | skew-y scale-y translate-y | + + SkMatrix is set, row, then column, to: + + | scale-x skew-x translate-x | + | skew-y scale-y translate-y | + | 0 0 1 | + + @param affine 3 by 2 affine matrix + */ + SkMatrix& setAffine(const SkScalar affine[6]); + + /** + * A matrix is categorized as 'perspective' if the bottom row is not [0, 0, 1]. + * However, for most uses (e.g. mapPoints) a bottom row of [0, 0, X] behaves like a + * non-perspective matrix, though it will be categorized as perspective. Calling + * normalizePerspective() will change the matrix such that, if its bottom row was [0, 0, X], + * it will be changed to [0, 0, 1] by scaling the rest of the matrix by 1/X. + * + * | A B C | | A/X B/X C/X | + * | D E F | -> | D/X E/X F/X | for X != 0 + * | 0 0 X | | 0 0 1 | + */ + void normalizePerspective() { + if (fMat[8] != 1) { + this->doNormalizePerspective(); + } + } + + /** Maps src SkPoint array of length count to dst SkPoint array of equal or greater + length. SkPoint are mapped by multiplying each SkPoint by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, pt = | y | + | G H I | | 1 | + + where + + for (i = 0; i < count; ++i) { + x = src[i].fX + y = src[i].fY + } + + each dst SkPoint is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + src and dst may point to the same storage. + + @param dst storage for mapped SkPoint + @param src SkPoint to transform + @param count number of SkPoint to transform + + example: https://fiddle.skia.org/c/@Matrix_mapPoints + */ + void mapPoints(SkPoint dst[], const SkPoint src[], int count) const; + + /** Maps pts SkPoint array of length count in place. SkPoint are mapped by multiplying + each SkPoint by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, pt = | y | + | G H I | | 1 | + + where + + for (i = 0; i < count; ++i) { + x = pts[i].fX + y = pts[i].fY + } + + each resulting pts SkPoint is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param pts storage for mapped SkPoint + @param count number of SkPoint to transform + */ + void mapPoints(SkPoint pts[], int count) const { + this->mapPoints(pts, pts, count); + } + + /** Maps src SkPoint3 array of length count to dst SkPoint3 array, which must of length count or + greater. SkPoint3 array is mapped by multiplying each SkPoint3 by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, src = | y | + | G H I | | z | + + each resulting dst SkPoint is computed as: + + |A B C| |x| + Matrix * src = |D E F| |y| = |Ax+By+Cz Dx+Ey+Fz Gx+Hy+Iz| + |G H I| |z| + + @param dst storage for mapped SkPoint3 array + @param src SkPoint3 array to transform + @param count items in SkPoint3 array to transform + + example: https://fiddle.skia.org/c/@Matrix_mapHomogeneousPoints + */ + void mapHomogeneousPoints(SkPoint3 dst[], const SkPoint3 src[], int count) const; + + /** + * Returns homogeneous points, starting with 2D src points (with implied w = 1). + */ + void mapHomogeneousPoints(SkPoint3 dst[], const SkPoint src[], int count) const; + + /** Returns SkPoint pt multiplied by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, pt = | y | + | G H I | | 1 | + + result is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param p SkPoint to map + @return mapped SkPoint + */ + SkPoint mapPoint(SkPoint pt) const { + SkPoint result; + this->mapXY(pt.x(), pt.y(), &result); + return result; + } + + /** Maps SkPoint (x, y) to result. SkPoint is mapped by multiplying by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, pt = | y | + | G H I | | 1 | + + result is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param x x-axis value of SkPoint to map + @param y y-axis value of SkPoint to map + @param result storage for mapped SkPoint + + example: https://fiddle.skia.org/c/@Matrix_mapXY + */ + void mapXY(SkScalar x, SkScalar y, SkPoint* result) const; + + /** Returns SkPoint (x, y) multiplied by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, pt = | y | + | G H I | | 1 | + + result is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param x x-axis value of SkPoint to map + @param y y-axis value of SkPoint to map + @return mapped SkPoint + */ + SkPoint mapXY(SkScalar x, SkScalar y) const { + SkPoint result; + this->mapXY(x,y, &result); + return result; + } + + + /** Returns (0, 0) multiplied by SkMatrix. Given: + + | A B C | | 0 | + Matrix = | D E F |, pt = | 0 | + | G H I | | 1 | + + result is computed as: + + |A B C| |0| C F + Matrix * pt = |D E F| |0| = |C F I| = - , - + |G H I| |1| I I + + @return mapped (0, 0) + */ + SkPoint mapOrigin() const { + SkScalar x = this->getTranslateX(), + y = this->getTranslateY(); + if (this->hasPerspective()) { + SkScalar w = fMat[kMPersp2]; + if (w) { w = 1 / w; } + x *= w; + y *= w; + } + return {x, y}; + } + + /** Maps src vector array of length count to vector SkPoint array of equal or greater + length. Vectors are mapped by multiplying each vector by SkMatrix, treating + SkMatrix translation as zero. Given: + + | A B 0 | | x | + Matrix = | D E 0 |, src = | y | + | G H I | | 1 | + + where + + for (i = 0; i < count; ++i) { + x = src[i].fX + y = src[i].fY + } + + each dst vector is computed as: + + |A B 0| |x| Ax+By Dx+Ey + Matrix * src = |D E 0| |y| = |Ax+By Dx+Ey Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + src and dst may point to the same storage. + + @param dst storage for mapped vectors + @param src vectors to transform + @param count number of vectors to transform + + example: https://fiddle.skia.org/c/@Matrix_mapVectors + */ + void mapVectors(SkVector dst[], const SkVector src[], int count) const; + + /** Maps vecs vector array of length count in place, multiplying each vector by + SkMatrix, treating SkMatrix translation as zero. Given: + + | A B 0 | | x | + Matrix = | D E 0 |, vec = | y | + | G H I | | 1 | + + where + + for (i = 0; i < count; ++i) { + x = vecs[i].fX + y = vecs[i].fY + } + + each result vector is computed as: + + |A B 0| |x| Ax+By Dx+Ey + Matrix * vec = |D E 0| |y| = |Ax+By Dx+Ey Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param vecs vectors to transform, and storage for mapped vectors + @param count number of vectors to transform + */ + void mapVectors(SkVector vecs[], int count) const { + this->mapVectors(vecs, vecs, count); + } + + /** Maps vector (dx, dy) to result. Vector is mapped by multiplying by SkMatrix, + treating SkMatrix translation as zero. Given: + + | A B 0 | | dx | + Matrix = | D E 0 |, vec = | dy | + | G H I | | 1 | + + each result vector is computed as: + + |A B 0| |dx| A*dx+B*dy D*dx+E*dy + Matrix * vec = |D E 0| |dy| = |A*dx+B*dy D*dx+E*dy G*dx+H*dy+I| = ----------- , ----------- + |G H I| | 1| G*dx+H*dy+I G*dx+*dHy+I + + @param dx x-axis value of vector to map + @param dy y-axis value of vector to map + @param result storage for mapped vector + */ + void mapVector(SkScalar dx, SkScalar dy, SkVector* result) const { + SkVector vec = { dx, dy }; + this->mapVectors(result, &vec, 1); + } + + /** Returns vector (dx, dy) multiplied by SkMatrix, treating SkMatrix translation as zero. + Given: + + | A B 0 | | dx | + Matrix = | D E 0 |, vec = | dy | + | G H I | | 1 | + + each result vector is computed as: + + |A B 0| |dx| A*dx+B*dy D*dx+E*dy + Matrix * vec = |D E 0| |dy| = |A*dx+B*dy D*dx+E*dy G*dx+H*dy+I| = ----------- , ----------- + |G H I| | 1| G*dx+H*dy+I G*dx+*dHy+I + + @param dx x-axis value of vector to map + @param dy y-axis value of vector to map + @return mapped vector + */ + SkVector mapVector(SkScalar dx, SkScalar dy) const { + SkVector vec = { dx, dy }; + this->mapVectors(&vec, &vec, 1); + return vec; + } + + /** Sets dst to bounds of src corners mapped by SkMatrix. + Returns true if mapped corners are dst corners. + + Returned value is the same as calling rectStaysRect(). + + @param dst storage for bounds of mapped SkPoint + @param src SkRect to map + @param pc whether to apply perspective clipping + @return true if dst is equivalent to mapped src + + example: https://fiddle.skia.org/c/@Matrix_mapRect + */ + bool mapRect(SkRect* dst, const SkRect& src, + SkApplyPerspectiveClip pc = SkApplyPerspectiveClip::kYes) const; + + /** Sets rect to bounds of rect corners mapped by SkMatrix. + Returns true if mapped corners are computed rect corners. + + Returned value is the same as calling rectStaysRect(). + + @param rect rectangle to map, and storage for bounds of mapped corners + @param pc whether to apply perspective clipping + @return true if result is equivalent to mapped rect + */ + bool mapRect(SkRect* rect, SkApplyPerspectiveClip pc = SkApplyPerspectiveClip::kYes) const { + return this->mapRect(rect, *rect, pc); + } + + /** Returns bounds of src corners mapped by SkMatrix. + + @param src rectangle to map + @return mapped bounds + */ + SkRect mapRect(const SkRect& src, + SkApplyPerspectiveClip pc = SkApplyPerspectiveClip::kYes) const { + SkRect dst; + (void)this->mapRect(&dst, src, pc); + return dst; + } + + /** Maps four corners of rect to dst. SkPoint are mapped by multiplying each + rect corner by SkMatrix. rect corner is processed in this order: + (rect.fLeft, rect.fTop), (rect.fRight, rect.fTop), (rect.fRight, rect.fBottom), + (rect.fLeft, rect.fBottom). + + rect may be empty: rect.fLeft may be greater than or equal to rect.fRight; + rect.fTop may be greater than or equal to rect.fBottom. + + Given: + + | A B C | | x | + Matrix = | D E F |, pt = | y | + | G H I | | 1 | + + where pt is initialized from each of (rect.fLeft, rect.fTop), + (rect.fRight, rect.fTop), (rect.fRight, rect.fBottom), (rect.fLeft, rect.fBottom), + each dst SkPoint is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param dst storage for mapped corner SkPoint + @param rect SkRect to map + + Note: this does not perform perspective clipping (as that might result in more than + 4 points, so results are suspect if the matrix contains perspective. + */ + void mapRectToQuad(SkPoint dst[4], const SkRect& rect) const { + // This could potentially be faster if we only transformed each x and y of the rect once. + rect.toQuad(dst); + this->mapPoints(dst, 4); + } + + /** Sets dst to bounds of src corners mapped by SkMatrix. If matrix contains + elements other than scale or translate: asserts if SK_DEBUG is defined; + otherwise, results are undefined. + + @param dst storage for bounds of mapped SkPoint + @param src SkRect to map + + example: https://fiddle.skia.org/c/@Matrix_mapRectScaleTranslate + */ + void mapRectScaleTranslate(SkRect* dst, const SkRect& src) const; + + /** Returns geometric mean radius of ellipse formed by constructing circle of + size radius, and mapping constructed circle with SkMatrix. The result squared is + equal to the major axis length times the minor axis length. + Result is not meaningful if SkMatrix contains perspective elements. + + @param radius circle size to map + @return average mapped radius + + example: https://fiddle.skia.org/c/@Matrix_mapRadius + */ + SkScalar mapRadius(SkScalar radius) const; + + /** Compares a and b; returns true if a and b are numerically equal. Returns true + even if sign of zero values are different. Returns false if either SkMatrix + contains NaN, even if the other SkMatrix also contains NaN. + + @param a SkMatrix to compare + @param b SkMatrix to compare + @return true if SkMatrix a and SkMatrix b are numerically equal + */ + friend SK_API bool operator==(const SkMatrix& a, const SkMatrix& b); + + /** Compares a and b; returns true if a and b are not numerically equal. Returns false + even if sign of zero values are different. Returns true if either SkMatrix + contains NaN, even if the other SkMatrix also contains NaN. + + @param a SkMatrix to compare + @param b SkMatrix to compare + @return true if SkMatrix a and SkMatrix b are numerically not equal + */ + friend SK_API bool operator!=(const SkMatrix& a, const SkMatrix& b) { + return !(a == b); + } + + /** Writes text representation of SkMatrix to standard output. Floating point values + are written with limited precision; it may not be possible to reconstruct + original SkMatrix from output. + + example: https://fiddle.skia.org/c/@Matrix_dump + */ + void dump() const; + + /** Returns the minimum scaling factor of SkMatrix by decomposing the scaling and + skewing elements. + Returns -1 if scale factor overflows or SkMatrix contains perspective. + + @return minimum scale factor + + example: https://fiddle.skia.org/c/@Matrix_getMinScale + */ + SkScalar getMinScale() const; + + /** Returns the maximum scaling factor of SkMatrix by decomposing the scaling and + skewing elements. + Returns -1 if scale factor overflows or SkMatrix contains perspective. + + @return maximum scale factor + + example: https://fiddle.skia.org/c/@Matrix_getMaxScale + */ + SkScalar getMaxScale() const; + + /** Sets scaleFactors[0] to the minimum scaling factor, and scaleFactors[1] to the + maximum scaling factor. Scaling factors are computed by decomposing + the SkMatrix scaling and skewing elements. + + Returns true if scaleFactors are found; otherwise, returns false and sets + scaleFactors to undefined values. + + @param scaleFactors storage for minimum and maximum scale factors + @return true if scale factors were computed correctly + */ + bool SK_WARN_UNUSED_RESULT getMinMaxScales(SkScalar scaleFactors[2]) const; + + /** Decomposes SkMatrix into scale components and whatever remains. Returns false if + SkMatrix could not be decomposed. + + Sets scale to portion of SkMatrix that scale axes. Sets remaining to SkMatrix + with scaling factored out. remaining may be passed as nullptr + to determine if SkMatrix can be decomposed without computing remainder. + + Returns true if scale components are found. scale and remaining are + unchanged if SkMatrix contains perspective; scale factors are not finite, or + are nearly zero. + + On success: Matrix = Remaining * scale. + + @param scale axes scaling factors; may be nullptr + @param remaining SkMatrix without scaling; may be nullptr + @return true if scale can be computed + + example: https://fiddle.skia.org/c/@Matrix_decomposeScale + */ + bool decomposeScale(SkSize* scale, SkMatrix* remaining = nullptr) const; + + /** Returns reference to const identity SkMatrix. Returned SkMatrix is set to: + + | 1 0 0 | + | 0 1 0 | + | 0 0 1 | + + @return const identity SkMatrix + + example: https://fiddle.skia.org/c/@Matrix_I + */ + static const SkMatrix& I(); + + /** Returns reference to a const SkMatrix with invalid values. Returned SkMatrix is set + to: + + | SK_ScalarMax SK_ScalarMax SK_ScalarMax | + | SK_ScalarMax SK_ScalarMax SK_ScalarMax | + | SK_ScalarMax SK_ScalarMax SK_ScalarMax | + + @return const invalid SkMatrix + + example: https://fiddle.skia.org/c/@Matrix_InvalidMatrix + */ + static const SkMatrix& InvalidMatrix(); + + /** Returns SkMatrix a multiplied by SkMatrix b. + + Given: + + | A B C | | J K L | + a = | D E F |, b = | M N O | + | G H I | | P Q R | + + sets SkMatrix to: + + | A B C | | J K L | | AJ+BM+CP AK+BN+CQ AL+BO+CR | + a * b = | D E F | * | M N O | = | DJ+EM+FP DK+EN+FQ DL+EO+FR | + | G H I | | P Q R | | GJ+HM+IP GK+HN+IQ GL+HO+IR | + + @param a SkMatrix on left side of multiply expression + @param b SkMatrix on right side of multiply expression + @return SkMatrix computed from a times b + */ + static SkMatrix Concat(const SkMatrix& a, const SkMatrix& b) { + SkMatrix result; + result.setConcat(a, b); + return result; + } + + friend SkMatrix operator*(const SkMatrix& a, const SkMatrix& b) { + return Concat(a, b); + } + + /** Sets internal cache to unknown state. Use to force update after repeated + modifications to SkMatrix element reference returned by operator[](int index). + */ + void dirtyMatrixTypeCache() { + this->setTypeMask(kUnknown_Mask); + } + + /** Initializes SkMatrix with scale and translate elements. + + | sx 0 tx | + | 0 sy ty | + | 0 0 1 | + + @param sx horizontal scale factor to store + @param sy vertical scale factor to store + @param tx horizontal translation to store + @param ty vertical translation to store + */ + void setScaleTranslate(SkScalar sx, SkScalar sy, SkScalar tx, SkScalar ty) { + fMat[kMScaleX] = sx; + fMat[kMSkewX] = 0; + fMat[kMTransX] = tx; + + fMat[kMSkewY] = 0; + fMat[kMScaleY] = sy; + fMat[kMTransY] = ty; + + fMat[kMPersp0] = 0; + fMat[kMPersp1] = 0; + fMat[kMPersp2] = 1; + + int mask = 0; + if (sx != 1 || sy != 1) { + mask |= kScale_Mask; + } + if (tx != 0.0f || ty != 0.0f) { + mask |= kTranslate_Mask; + } + if (sx != 0 && sy != 0) { + mask |= kRectStaysRect_Mask; + } + this->setTypeMask(mask); + } + + /** Returns true if all elements of the matrix are finite. Returns false if any + element is infinity, or NaN. + + @return true if matrix has only finite elements + */ + bool isFinite() const { return SkScalarsAreFinite(fMat, 9); } + +private: + /** Set if the matrix will map a rectangle to another rectangle. This + can be true if the matrix is scale-only, or rotates a multiple of + 90 degrees. + + This bit will be set on identity matrices + */ + static constexpr int kRectStaysRect_Mask = 0x10; + + /** Set if the perspective bit is valid even though the rest of + the matrix is Unknown. + */ + static constexpr int kOnlyPerspectiveValid_Mask = 0x40; + + static constexpr int kUnknown_Mask = 0x80; + + static constexpr int kORableMasks = kTranslate_Mask | + kScale_Mask | + kAffine_Mask | + kPerspective_Mask; + + static constexpr int kAllMasks = kTranslate_Mask | + kScale_Mask | + kAffine_Mask | + kPerspective_Mask | + kRectStaysRect_Mask; + + SkScalar fMat[9]; + mutable int32_t fTypeMask; + + constexpr SkMatrix(SkScalar sx, SkScalar kx, SkScalar tx, + SkScalar ky, SkScalar sy, SkScalar ty, + SkScalar p0, SkScalar p1, SkScalar p2, int typeMask) + : fMat{sx, kx, tx, + ky, sy, ty, + p0, p1, p2} + , fTypeMask(typeMask) {} + + static void ComputeInv(SkScalar dst[9], const SkScalar src[9], double invDet, bool isPersp); + + uint8_t computeTypeMask() const; + uint8_t computePerspectiveTypeMask() const; + + void setTypeMask(int mask) { + // allow kUnknown or a valid mask + SkASSERT(kUnknown_Mask == mask || (mask & kAllMasks) == mask || + ((kUnknown_Mask | kOnlyPerspectiveValid_Mask) & mask) + == (kUnknown_Mask | kOnlyPerspectiveValid_Mask)); + fTypeMask = mask; + } + + void orTypeMask(int mask) { + SkASSERT((mask & kORableMasks) == mask); + fTypeMask |= mask; + } + + void clearTypeMask(int mask) { + // only allow a valid mask + SkASSERT((mask & kAllMasks) == mask); + fTypeMask &= ~mask; + } + + TypeMask getPerspectiveTypeMaskOnly() const { + if ((fTypeMask & kUnknown_Mask) && + !(fTypeMask & kOnlyPerspectiveValid_Mask)) { + fTypeMask = this->computePerspectiveTypeMask(); + } + return (TypeMask)(fTypeMask & 0xF); + } + + /** Returns true if we already know that the matrix is identity; + false otherwise. + */ + bool isTriviallyIdentity() const { + if (fTypeMask & kUnknown_Mask) { + return false; + } + return ((fTypeMask & 0xF) == 0); + } + + inline void updateTranslateMask() { + if ((fMat[kMTransX] != 0) | (fMat[kMTransY] != 0)) { + fTypeMask |= kTranslate_Mask; + } else { + fTypeMask &= ~kTranslate_Mask; + } + } + + typedef void (*MapXYProc)(const SkMatrix& mat, SkScalar x, SkScalar y, + SkPoint* result); + + static MapXYProc GetMapXYProc(TypeMask mask) { + SkASSERT((mask & ~kAllMasks) == 0); + return gMapXYProcs[mask & kAllMasks]; + } + + MapXYProc getMapXYProc() const { + return GetMapXYProc(this->getType()); + } + + typedef void (*MapPtsProc)(const SkMatrix& mat, SkPoint dst[], + const SkPoint src[], int count); + + static MapPtsProc GetMapPtsProc(TypeMask mask) { + SkASSERT((mask & ~kAllMasks) == 0); + return gMapPtsProcs[mask & kAllMasks]; + } + + MapPtsProc getMapPtsProc() const { + return GetMapPtsProc(this->getType()); + } + + bool SK_WARN_UNUSED_RESULT invertNonIdentity(SkMatrix* inverse) const; + + static bool Poly2Proc(const SkPoint[], SkMatrix*); + static bool Poly3Proc(const SkPoint[], SkMatrix*); + static bool Poly4Proc(const SkPoint[], SkMatrix*); + + static void Identity_xy(const SkMatrix&, SkScalar, SkScalar, SkPoint*); + static void Trans_xy(const SkMatrix&, SkScalar, SkScalar, SkPoint*); + static void Scale_xy(const SkMatrix&, SkScalar, SkScalar, SkPoint*); + static void ScaleTrans_xy(const SkMatrix&, SkScalar, SkScalar, SkPoint*); + static void Rot_xy(const SkMatrix&, SkScalar, SkScalar, SkPoint*); + static void RotTrans_xy(const SkMatrix&, SkScalar, SkScalar, SkPoint*); + static void Persp_xy(const SkMatrix&, SkScalar, SkScalar, SkPoint*); + + static const MapXYProc gMapXYProcs[]; + + static void Identity_pts(const SkMatrix&, SkPoint[], const SkPoint[], int); + static void Trans_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], int); + static void Scale_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], int); + static void ScaleTrans_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], + int count); + static void Persp_pts(const SkMatrix&, SkPoint dst[], const SkPoint[], int); + + static void Affine_vpts(const SkMatrix&, SkPoint dst[], const SkPoint[], int); + + static const MapPtsProc gMapPtsProcs[]; + + // return the number of bytes written, whether or not buffer is null + size_t writeToMemory(void* buffer) const; + /** + * Reads data from the buffer parameter + * + * @param buffer Memory to read from + * @param length Amount of memory available in the buffer + * @return number of bytes read (must be a multiple of 4) or + * 0 if there was not enough memory available + */ + size_t readFromMemory(const void* buffer, size_t length); + + // legacy method -- still needed? why not just postScale(1/divx, ...)? + bool postIDiv(int divx, int divy); + void doNormalizePerspective(); + + friend class SkPerspIter; + friend class SkMatrixPriv; + friend class SerializationTest; +}; +SK_END_REQUIRE_DENSE + +#endif diff --git a/gfx/skia/skia/include/core/SkMesh.h b/gfx/skia/skia/include/core/SkMesh.h new file mode 100644 index 0000000000..360a039e7f --- /dev/null +++ b/gfx/skia/skia/include/core/SkMesh.h @@ -0,0 +1,423 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMesh_DEFINED +#define SkMesh_DEFINED + +#include "include/core/SkTypes.h" + +#ifdef SK_ENABLE_SKSL +#include "include/core/SkAlphaType.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSpan.h" +#include "include/core/SkString.h" +#include "include/effects/SkRuntimeEffect.h" + +#include +#include +#include + +class GrDirectContext; +class SkColorSpace; +class SkData; + +namespace SkSL { struct Program; } + +/** + * A specification for custom meshes. Specifies the vertex buffer attributes and stride, the + * vertex program that produces a user-defined set of varyings, and a fragment program that ingests + * the interpolated varyings and produces local coordinates for shading and optionally a color. + * + * The varyings must include a float2 named "position". If the passed varyings does not + * contain such a varying then one is implicitly added to the final specification and the SkSL + * Varyings struct described below. It is an error to have a varying named "position" that has a + * type other than float2. + * + * The provided attributes and varyings are used to create Attributes and Varyings structs in SkSL + * that are used by the shaders. Each attribute from the Attribute span becomes a member of the + * SkSL Attributes struct and likewise for the varyings. + * + * The signature of the vertex program must be: + * Varyings main(const Attributes). + * + * The signature of the fragment program must be either: + * float2 main(const Varyings) + * or + * float2 main(const Varyings, out (half4|float4) color) + * + * where the return value is the local coordinates that will be used to access SkShader. If the + * color variant is used, the returned color will be blended with SkPaint's SkShader (or SkPaint + * color in absence of a SkShader) using the SkBlender passed to SkCanvas drawMesh(). To use + * interpolated local space positions as the shader coordinates, equivalent to how SkPaths are + * shaded, return the position field from the Varying struct as the coordinates. + * + * The vertex and fragment programs may both contain uniforms. Uniforms with the same name are + * assumed to be shared between stages. It is an error to specify uniforms in the vertex and + * fragment program with the same name but different types, dimensionality, or layouts. + */ +class SkMeshSpecification : public SkNVRefCnt { +public: + /** These values are enforced when creating a specification. */ + static constexpr size_t kMaxStride = 1024; + static constexpr size_t kMaxAttributes = 8; + static constexpr size_t kStrideAlignment = 4; + static constexpr size_t kOffsetAlignment = 4; + static constexpr size_t kMaxVaryings = 6; + + struct Attribute { + enum class Type : uint32_t { // CPU representation Shader Type + kFloat, // float float + kFloat2, // two floats float2 + kFloat3, // three floats float3 + kFloat4, // four floats float4 + kUByte4_unorm, // four bytes half4 + + kLast = kUByte4_unorm + }; + Type type; + size_t offset; + SkString name; + }; + + struct Varying { + enum class Type : uint32_t { + kFloat, // "float" + kFloat2, // "float2" + kFloat3, // "float3" + kFloat4, // "float4" + kHalf, // "half" + kHalf2, // "half2" + kHalf3, // "half3" + kHalf4, // "half4" + + kLast = kHalf4 + }; + Type type; + SkString name; + }; + + using Uniform = SkRuntimeEffect::Uniform; + + ~SkMeshSpecification(); + + struct Result { + sk_sp specification; + SkString error; + }; + + /** + * If successful the return is a specification and an empty error string. Otherwise, it is a + * null specification a non-empty error string. + * + * @param attributes The vertex attributes that will be consumed by 'vs'. Attributes need + * not be tightly packed but attribute offsets must be aligned to + * kOffsetAlignment and offset + size may not be greater than + * 'vertexStride'. At least one attribute is required. + * @param vertexStride The offset between successive attribute values. This must be aligned to + * kStrideAlignment. + * @param varyings The varyings that will be written by 'vs' and read by 'fs'. This may + * be empty. + * @param vs The vertex shader code that computes a vertex position and the varyings + * from the attributes. + * @param fs The fragment code that computes a local coordinate and optionally a + * color from the varyings. The local coordinate is used to sample + * SkShader. + * @param cs The colorspace of the color produced by 'fs'. Ignored if 'fs's main() + * function does not have a color out param. + * @param at The alpha type of the color produced by 'fs'. Ignored if 'fs's main() + * function does not have a color out param. Cannot be kUnknown. + */ + static Result Make(SkSpan attributes, + size_t vertexStride, + SkSpan varyings, + const SkString& vs, + const SkString& fs); + static Result Make(SkSpan attributes, + size_t vertexStride, + SkSpan varyings, + const SkString& vs, + const SkString& fs, + sk_sp cs); + static Result Make(SkSpan attributes, + size_t vertexStride, + SkSpan varyings, + const SkString& vs, + const SkString& fs, + sk_sp cs, + SkAlphaType at); + + SkSpan attributes() const { return SkSpan(fAttributes); } + + /** + * Combined size of all 'uniform' variables. When creating a SkMesh with this specification + * provide an SkData of this size, containing values for all of those variables. Use uniforms() + * to get the offset of each uniform within the SkData. + */ + size_t uniformSize() const; + + /** + * Provides info about individual uniforms including the offset into an SkData where each + * uniform value should be placed. + */ + SkSpan uniforms() const { return SkSpan(fUniforms); } + + /** Returns pointer to the named uniform variable's description, or nullptr if not found. */ + const Uniform* findUniform(std::string_view name) const; + + /** Returns pointer to the named attribute, or nullptr if not found. */ + const Attribute* findAttribute(std::string_view name) const; + + /** Returns pointer to the named varying, or nullptr if not found. */ + const Varying* findVarying(std::string_view name) const; + + size_t stride() const { return fStride; } + +private: + friend struct SkMeshSpecificationPriv; + + enum class ColorType { + kNone, + kHalf4, + kFloat4, + }; + + static Result MakeFromSourceWithStructs(SkSpan attributes, + size_t stride, + SkSpan varyings, + const SkString& vs, + const SkString& fs, + sk_sp cs, + SkAlphaType at); + + SkMeshSpecification(SkSpan, + size_t, + SkSpan, + int passthroughLocalCoordsVaryingIndex, + uint32_t deadVaryingMask, + std::vector uniforms, + std::unique_ptr, + std::unique_ptr, + ColorType, + sk_sp, + SkAlphaType); + + SkMeshSpecification(const SkMeshSpecification&) = delete; + SkMeshSpecification(SkMeshSpecification&&) = delete; + + SkMeshSpecification& operator=(const SkMeshSpecification&) = delete; + SkMeshSpecification& operator=(SkMeshSpecification&&) = delete; + + const std::vector fAttributes; + const std::vector fVaryings; + const std::vector fUniforms; + const std::unique_ptr fVS; + const std::unique_ptr fFS; + const size_t fStride; + uint32_t fHash; + const int fPassthroughLocalCoordsVaryingIndex; + const uint32_t fDeadVaryingMask; + const ColorType fColorType; + const sk_sp fColorSpace; + const SkAlphaType fAlphaType; +}; + +/** + * A vertex buffer, a topology, optionally an index buffer, and a compatible SkMeshSpecification. + * + * The data in the vertex buffer is expected to contain the attributes described by the spec + * for vertexCount vertices beginning at vertexOffset. vertexOffset must be aligned to the + * SkMeshSpecification's vertex stride. The size of the buffer must be at least vertexOffset + + * spec->stride()*vertexCount (even if vertex attributes contains pad at the end of the stride). If + * the specified bounds does not contain all the points output by the spec's vertex program when + * applied to the vertices in the custom mesh then the result is undefined. + * + * MakeIndexed may be used to create an indexed mesh. indexCount indices are read from the index + * buffer at the specified offset which must be aligned to 2. The indices are always unsigned 16bit + * integers. The index count must be at least 3. + * + * If Make() is used the implicit index sequence is 0, 1, 2, 3, ... and vertexCount must be at least + * 3. + * + * Both Make() and MakeIndexed() take a SkData with the uniform values. See + * SkMeshSpecification::uniformSize() and SkMeshSpecification::uniforms() for sizing and packing + * uniforms into the SkData. + */ +class SkMesh { +public: + class IndexBuffer : public SkRefCnt { + public: + virtual size_t size() const = 0; + + /** + * Modifies the data in the IndexBuffer by copying size bytes from data into the buffer + * at offset. Fails if offset + size > this->size() or if either offset or size is not + * aligned to 4 bytes. The GrDirectContext* must match that used to create the buffer. We + * take it as a parameter to emphasize that the context must be used to update the data and + * thus the context must be valid for the current thread. + */ + bool update(GrDirectContext*, const void* data, size_t offset, size_t size); + + private: + virtual bool onUpdate(GrDirectContext*, const void* data, size_t offset, size_t size) = 0; + }; + + class VertexBuffer : public SkRefCnt { + public: + virtual size_t size() const = 0; + + /** + * Modifies the data in the IndexBuffer by copying size bytes from data into the buffer + * at offset. Fails if offset + size > this->size() or if either offset or size is not + * aligned to 4 bytes. The GrDirectContext* must match that used to create the buffer. We + * take it as a parameter to emphasize that the context must be used to update the data and + * thus the context must be valid for the current thread. + */ + bool update(GrDirectContext*, const void* data, size_t offset, size_t size); + + private: + virtual bool onUpdate(GrDirectContext*, const void* data, size_t offset, size_t size) = 0; + }; + + SkMesh(); + ~SkMesh(); + + SkMesh(const SkMesh&); + SkMesh(SkMesh&&); + + SkMesh& operator=(const SkMesh&); + SkMesh& operator=(SkMesh&&); + + /** + * Makes an index buffer to be used with SkMeshes. The buffer may be CPU- or GPU-backed + * depending on whether GrDirectContext* is nullptr. + * + * @param GrDirectContext* If nullptr a CPU-backed object is returned. Otherwise, the data is + * uploaded to the GPU and a GPU-backed buffer is returned. It may + * only be used to draw into SkSurfaces that are backed by the passed + * GrDirectContext. + * @param data The data used to populate the buffer, or nullptr to create a zero- + * initialized buffer. + * @param size Both the size of the data in 'data' and the size of the resulting + * buffer. + */ + static sk_sp MakeIndexBuffer(GrDirectContext*, const void* data, size_t size); + + /** + * Makes a copy of an index buffer. The implementation currently only supports a CPU-backed + * source buffer. + */ + static sk_sp CopyIndexBuffer(GrDirectContext*, sk_sp); + + /** + * Makes a vertex buffer to be used with SkMeshes. The buffer may be CPU- or GPU-backed + * depending on whether GrDirectContext* is nullptr. + * + * @param GrDirectContext* If nullptr a CPU-backed object is returned. Otherwise, the data is + * uploaded to the GPU and a GPU-backed buffer is returned. It may + * only be used to draw into SkSurfaces that are backed by the passed + * GrDirectContext. + * @param data The data used to populate the buffer, or nullptr to create a zero- + * initialized buffer. + * @param size Both the size of the data in 'data' and the size of the resulting + * buffer. + */ + static sk_sp MakeVertexBuffer(GrDirectContext*, const void*, size_t size); + + /** + * Makes a copy of a vertex buffer. The implementation currently only supports a CPU-backed + * source buffer. + */ + static sk_sp CopyVertexBuffer(GrDirectContext*, sk_sp); + + enum class Mode { kTriangles, kTriangleStrip }; + + struct Result; + + /** + * Creates a non-indexed SkMesh. The returned SkMesh can be tested for validity using + * SkMesh::isValid(). An invalid mesh simply fails to draws if passed to SkCanvas::drawMesh(). + * If the mesh is invalid the returned string give contain the reason for the failure (e.g. the + * vertex buffer was null or uniform data too small). + */ + static Result Make(sk_sp, + Mode, + sk_sp, + size_t vertexCount, + size_t vertexOffset, + sk_sp uniforms, + const SkRect& bounds); + + /** + * Creates an indexed SkMesh. The returned SkMesh can be tested for validity using + * SkMesh::isValid(). A invalid mesh simply fails to draw if passed to SkCanvas::drawMesh(). + * If the mesh is invalid the returned string give contain the reason for the failure (e.g. the + * index buffer was null or uniform data too small). + */ + static Result MakeIndexed(sk_sp, + Mode, + sk_sp, + size_t vertexCount, + size_t vertexOffset, + sk_sp, + size_t indexCount, + size_t indexOffset, + sk_sp uniforms, + const SkRect& bounds); + + sk_sp refSpec() const { return fSpec; } + SkMeshSpecification* spec() const { return fSpec.get(); } + + Mode mode() const { return fMode; } + + sk_sp refVertexBuffer() const { return fVB; } + VertexBuffer* vertexBuffer() const { return fVB.get(); } + + size_t vertexOffset() const { return fVOffset; } + size_t vertexCount() const { return fVCount; } + + sk_sp refIndexBuffer() const { return fIB; } + IndexBuffer* indexBuffer() const { return fIB.get(); } + + size_t indexOffset() const { return fIOffset; } + size_t indexCount() const { return fICount; } + + sk_sp refUniforms() const { return fUniforms; } + const SkData* uniforms() const { return fUniforms.get(); } + + SkRect bounds() const { return fBounds; } + + bool isValid() const; + +private: + friend struct SkMeshPriv; + + std::tuple validate() const; + + sk_sp fSpec; + + sk_sp fVB; + sk_sp fIB; + + sk_sp fUniforms; + + size_t fVOffset = 0; // Must be a multiple of spec->stride() + size_t fVCount = 0; + + size_t fIOffset = 0; // Must be a multiple of sizeof(uint16_t) + size_t fICount = 0; + + Mode fMode = Mode::kTriangles; + + SkRect fBounds = SkRect::MakeEmpty(); +}; + +struct SkMesh::Result { SkMesh mesh; SkString error; }; + +#endif // SK_ENABLE_SKSL + +#endif diff --git a/gfx/skia/skia/include/core/SkMilestone.h b/gfx/skia/skia/include/core/SkMilestone.h new file mode 100644 index 0000000000..dd0eebe924 --- /dev/null +++ b/gfx/skia/skia/include/core/SkMilestone.h @@ -0,0 +1,9 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SK_MILESTONE +#define SK_MILESTONE 113 +#endif diff --git a/gfx/skia/skia/include/core/SkOpenTypeSVGDecoder.h b/gfx/skia/skia/include/core/SkOpenTypeSVGDecoder.h new file mode 100644 index 0000000000..5a2e48a9df --- /dev/null +++ b/gfx/skia/skia/include/core/SkOpenTypeSVGDecoder.h @@ -0,0 +1,30 @@ +/* + * Copyright 2022 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOpenTypeSVGDecoder_DEFINED +#define SkOpenTypeSVGDecoder_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" + +#include + +class SkCanvas; + +class SkOpenTypeSVGDecoder { +public: + /** Each instance probably owns an SVG DOM. + * The instance may be cached so needs to report how much memory it retains. + */ + virtual size_t approximateSize() = 0; + virtual bool render(SkCanvas&, int upem, SkGlyphID glyphId, + SkColor foregroundColor, SkSpan palette) = 0; + virtual ~SkOpenTypeSVGDecoder() = default; +}; + +#endif // SkOpenTypeSVGDecoder_DEFINED diff --git a/gfx/skia/skia/include/core/SkOverdrawCanvas.h b/gfx/skia/skia/include/core/SkOverdrawCanvas.h new file mode 100644 index 0000000000..f3ffc06556 --- /dev/null +++ b/gfx/skia/skia/include/core/SkOverdrawCanvas.h @@ -0,0 +1,69 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOverdrawCanvas_DEFINED +#define SkOverdrawCanvas_DEFINED + +#include "include/core/SkCanvasVirtualEnforcer.h" +#include "include/utils/SkNWayCanvas.h" + +/** + * Captures all drawing commands. Rather than draw the actual content, this device + * increments the alpha channel of each pixel every time it would have been touched + * by a draw call. This is useful for detecting overdraw. + */ +class SK_API SkOverdrawCanvas : public SkCanvasVirtualEnforcer { +public: + /* Does not take ownership of canvas */ + SkOverdrawCanvas(SkCanvas*); + + void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override; + void onDrawGlyphRunList( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) override; + void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode, + const SkPaint&) override; + void onDrawPaint(const SkPaint&) override; + void onDrawBehind(const SkPaint& paint) override; + void onDrawRect(const SkRect&, const SkPaint&) override; + void onDrawRegion(const SkRegion&, const SkPaint&) override; + void onDrawOval(const SkRect&, const SkPaint&) override; + void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override; + void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override; + void onDrawRRect(const SkRRect&, const SkPaint&) override; + void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override; + void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override; + void onDrawPath(const SkPath&, const SkPaint&) override; + + void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&, + const SkPaint*) override; + void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&, + const SkPaint*, SrcRectConstraint) override; + void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode, + const SkPaint*) override; + void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int, + SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override; + + void onDrawDrawable(SkDrawable*, const SkMatrix*) override; + void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override; + + void onDrawAnnotation(const SkRect&, const char key[], SkData* value) override; + void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override; + + void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], SkCanvas::QuadAAFlags, const SkColor4f&, + SkBlendMode) override; + void onDrawEdgeAAImageSet2(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[], + const SkSamplingOptions&,const SkPaint*, SrcRectConstraint) override; + +private: + inline SkPaint overdrawPaint(const SkPaint& paint); + + SkPaint fPaint; + + using INHERITED = SkCanvasVirtualEnforcer; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPaint.h b/gfx/skia/skia/include/core/SkPaint.h new file mode 100644 index 0000000000..157dbb59d8 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPaint.h @@ -0,0 +1,695 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPaint_DEFINED +#define SkPaint_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTo.h" +#include "include/private/base/SkTypeTraits.h" + +#include +#include +#include + +class SkBlender; +class SkColorFilter; +class SkColorSpace; +class SkImageFilter; +class SkMaskFilter; +class SkPathEffect; +class SkShader; +enum class SkBlendMode; +struct SkRect; + +/** \class SkPaint + SkPaint controls options applied when drawing. SkPaint collects all + options outside of the SkCanvas clip and SkCanvas matrix. + + Various options apply to strokes and fills, and images. + + SkPaint collects effects and filters that describe single-pass and multiple-pass + algorithms that alter the drawing geometry, color, and transparency. For instance, + SkPaint does not directly implement dashing or blur, but contains the objects that do so. +*/ +class SK_API SkPaint { +public: + + /** Constructs SkPaint with default values. + + @return default initialized SkPaint + + example: https://fiddle.skia.org/c/@Paint_empty_constructor + */ + SkPaint(); + + /** Constructs SkPaint with default values and the given color. + + Sets alpha and RGB used when stroking and filling. The color is four floating + point values, unpremultiplied. The color values are interpreted as being in + the colorSpace. If colorSpace is nullptr, then color is assumed to be in the + sRGB color space. + + @param color unpremultiplied RGBA + @param colorSpace SkColorSpace describing the encoding of color + @return SkPaint with the given color + */ + explicit SkPaint(const SkColor4f& color, SkColorSpace* colorSpace = nullptr); + + /** Makes a shallow copy of SkPaint. SkPathEffect, SkShader, + SkMaskFilter, SkColorFilter, and SkImageFilter are shared + between the original paint and the copy. Objects containing SkRefCnt increment + their references by one. + + The referenced objects SkPathEffect, SkShader, SkMaskFilter, SkColorFilter, + and SkImageFilter cannot be modified after they are created. + This prevents objects with SkRefCnt from being modified once SkPaint refers to them. + + @param paint original to copy + @return shallow copy of paint + + example: https://fiddle.skia.org/c/@Paint_copy_const_SkPaint + */ + SkPaint(const SkPaint& paint); + + /** Implements a move constructor to avoid increasing the reference counts + of objects referenced by the paint. + + After the call, paint is undefined, and can be safely destructed. + + @param paint original to move + @return content of paint + + example: https://fiddle.skia.org/c/@Paint_move_SkPaint + */ + SkPaint(SkPaint&& paint); + + /** Decreases SkPaint SkRefCnt of owned objects: SkPathEffect, SkShader, + SkMaskFilter, SkColorFilter, and SkImageFilter. If the + objects containing SkRefCnt go to zero, they are deleted. + */ + ~SkPaint(); + + /** Makes a shallow copy of SkPaint. SkPathEffect, SkShader, + SkMaskFilter, SkColorFilter, and SkImageFilter are shared + between the original paint and the copy. Objects containing SkRefCnt in the + prior destination are decreased by one, and the referenced objects are deleted if the + resulting count is zero. Objects containing SkRefCnt in the parameter paint + are increased by one. paint is unmodified. + + @param paint original to copy + @return content of paint + + example: https://fiddle.skia.org/c/@Paint_copy_operator + */ + SkPaint& operator=(const SkPaint& paint); + + /** Moves the paint to avoid increasing the reference counts + of objects referenced by the paint parameter. Objects containing SkRefCnt in the + prior destination are decreased by one; those objects are deleted if the resulting count + is zero. + + After the call, paint is undefined, and can be safely destructed. + + @param paint original to move + @return content of paint + + example: https://fiddle.skia.org/c/@Paint_move_operator + */ + SkPaint& operator=(SkPaint&& paint); + + /** Compares a and b, and returns true if a and b are equivalent. May return false + if SkPathEffect, SkShader, SkMaskFilter, SkColorFilter, + or SkImageFilter have identical contents but different pointers. + + @param a SkPaint to compare + @param b SkPaint to compare + @return true if SkPaint pair are equivalent + */ + SK_API friend bool operator==(const SkPaint& a, const SkPaint& b); + + /** Compares a and b, and returns true if a and b are not equivalent. May return true + if SkPathEffect, SkShader, SkMaskFilter, SkColorFilter, + or SkImageFilter have identical contents but different pointers. + + @param a SkPaint to compare + @param b SkPaint to compare + @return true if SkPaint pair are not equivalent + */ + friend bool operator!=(const SkPaint& a, const SkPaint& b) { + return !(a == b); + } + + /** Sets all SkPaint contents to their initial values. This is equivalent to replacing + SkPaint with the result of SkPaint(). + + example: https://fiddle.skia.org/c/@Paint_reset + */ + void reset(); + + /** Returns true if pixels on the active edges of SkPath may be drawn with partial transparency. + @return antialiasing state + */ + bool isAntiAlias() const { + return SkToBool(fBitfields.fAntiAlias); + } + + /** Requests, but does not require, that edge pixels draw opaque or with + partial transparency. + @param aa setting for antialiasing + */ + void setAntiAlias(bool aa) { fBitfields.fAntiAlias = static_cast(aa); } + + /** Returns true if color error may be distributed to smooth color transition. + @return dithering state + */ + bool isDither() const { + return SkToBool(fBitfields.fDither); + } + + /** Requests, but does not require, to distribute color error. + @param dither setting for ditering + */ + void setDither(bool dither) { fBitfields.fDither = static_cast(dither); } + + /** \enum SkPaint::Style + Set Style to fill, stroke, or both fill and stroke geometry. + The stroke and fill + share all paint attributes; for instance, they are drawn with the same color. + + Use kStrokeAndFill_Style to avoid hitting the same pixels twice with a stroke draw and + a fill draw. + */ + enum Style : uint8_t { + kFill_Style, //!< set to fill geometry + kStroke_Style, //!< set to stroke geometry + kStrokeAndFill_Style, //!< sets to stroke and fill geometry + }; + + /** May be used to verify that SkPaint::Style is a legal value. + */ + static constexpr int kStyleCount = kStrokeAndFill_Style + 1; + + /** Returns whether the geometry is filled, stroked, or filled and stroked. + */ + Style getStyle() const { return (Style)fBitfields.fStyle; } + + /** Sets whether the geometry is filled, stroked, or filled and stroked. + Has no effect if style is not a legal SkPaint::Style value. + + example: https://fiddle.skia.org/c/@Paint_setStyle + example: https://fiddle.skia.org/c/@Stroke_Width + */ + void setStyle(Style style); + + /** + * Set paint's style to kStroke if true, or kFill if false. + */ + void setStroke(bool); + + /** Retrieves alpha and RGB, unpremultiplied, packed into 32 bits. + Use helpers SkColorGetA(), SkColorGetR(), SkColorGetG(), and SkColorGetB() to extract + a color component. + + @return unpremultiplied ARGB + */ + SkColor getColor() const { return fColor4f.toSkColor(); } + + /** Retrieves alpha and RGB, unpremultiplied, as four floating point values. RGB are + extended sRGB values (sRGB gamut, and encoded with the sRGB transfer function). + + @return unpremultiplied RGBA + */ + SkColor4f getColor4f() const { return fColor4f; } + + /** Sets alpha and RGB used when stroking and filling. The color is a 32-bit value, + unpremultiplied, packing 8-bit components for alpha, red, blue, and green. + + @param color unpremultiplied ARGB + + example: https://fiddle.skia.org/c/@Paint_setColor + */ + void setColor(SkColor color); + + /** Sets alpha and RGB used when stroking and filling. The color is four floating + point values, unpremultiplied. The color values are interpreted as being in + the colorSpace. If colorSpace is nullptr, then color is assumed to be in the + sRGB color space. + + @param color unpremultiplied RGBA + @param colorSpace SkColorSpace describing the encoding of color + */ + void setColor(const SkColor4f& color, SkColorSpace* colorSpace = nullptr); + + void setColor4f(const SkColor4f& color, SkColorSpace* colorSpace = nullptr) { + this->setColor(color, colorSpace); + } + + /** Retrieves alpha from the color used when stroking and filling. + + @return alpha ranging from zero, fully transparent, to one, fully opaque + */ + float getAlphaf() const { return fColor4f.fA; } + + // Helper that scales the alpha by 255. + uint8_t getAlpha() const { + return static_cast(sk_float_round2int(this->getAlphaf() * 255)); + } + + /** Replaces alpha, leaving RGB + unchanged. An out of range value triggers an assert in the debug + build. a is a value from 0.0 to 1.0. + a set to zero makes color fully transparent; a set to 1.0 makes color + fully opaque. + + @param a alpha component of color + */ + void setAlphaf(float a); + + // Helper that accepts an int between 0 and 255, and divides it by 255.0 + void setAlpha(U8CPU a) { + this->setAlphaf(a * (1.0f / 255)); + } + + /** Sets color used when drawing solid fills. The color components range from 0 to 255. + The color is unpremultiplied; alpha sets the transparency independent of RGB. + + @param a amount of alpha, from fully transparent (0) to fully opaque (255) + @param r amount of red, from no red (0) to full red (255) + @param g amount of green, from no green (0) to full green (255) + @param b amount of blue, from no blue (0) to full blue (255) + + example: https://fiddle.skia.org/c/@Paint_setARGB + */ + void setARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b); + + /** Returns the thickness of the pen used by SkPaint to + outline the shape. + + @return zero for hairline, greater than zero for pen thickness + */ + SkScalar getStrokeWidth() const { return fWidth; } + + /** Sets the thickness of the pen used by the paint to outline the shape. + A stroke-width of zero is treated as "hairline" width. Hairlines are always exactly one + pixel wide in device space (their thickness does not change as the canvas is scaled). + Negative stroke-widths are invalid; setting a negative width will have no effect. + + @param width zero thickness for hairline; greater than zero for pen thickness + + example: https://fiddle.skia.org/c/@Miter_Limit + example: https://fiddle.skia.org/c/@Paint_setStrokeWidth + */ + void setStrokeWidth(SkScalar width); + + /** Returns the limit at which a sharp corner is drawn beveled. + + @return zero and greater miter limit + */ + SkScalar getStrokeMiter() const { return fMiterLimit; } + + /** Sets the limit at which a sharp corner is drawn beveled. + Valid values are zero and greater. + Has no effect if miter is less than zero. + + @param miter zero and greater miter limit + + example: https://fiddle.skia.org/c/@Paint_setStrokeMiter + */ + void setStrokeMiter(SkScalar miter); + + /** \enum SkPaint::Cap + Cap draws at the beginning and end of an open path contour. + */ + enum Cap { + kButt_Cap, //!< no stroke extension + kRound_Cap, //!< adds circle + kSquare_Cap, //!< adds square + kLast_Cap = kSquare_Cap, //!< largest Cap value + kDefault_Cap = kButt_Cap, //!< equivalent to kButt_Cap + }; + + /** May be used to verify that SkPaint::Cap is a legal value. + */ + static constexpr int kCapCount = kLast_Cap + 1; + + /** \enum SkPaint::Join + Join specifies how corners are drawn when a shape is stroked. Join + affects the four corners of a stroked rectangle, and the connected segments in a + stroked path. + + Choose miter join to draw sharp corners. Choose round join to draw a circle with a + radius equal to the stroke width on top of the corner. Choose bevel join to minimally + connect the thick strokes. + + The fill path constructed to describe the stroked path respects the join setting but may + not contain the actual join. For instance, a fill path constructed with round joins does + not necessarily include circles at each connected segment. + */ + enum Join : uint8_t { + kMiter_Join, //!< extends to miter limit + kRound_Join, //!< adds circle + kBevel_Join, //!< connects outside edges + kLast_Join = kBevel_Join, //!< equivalent to the largest value for Join + kDefault_Join = kMiter_Join, //!< equivalent to kMiter_Join + }; + + /** May be used to verify that SkPaint::Join is a legal value. + */ + static constexpr int kJoinCount = kLast_Join + 1; + + /** Returns the geometry drawn at the beginning and end of strokes. + */ + Cap getStrokeCap() const { return (Cap)fBitfields.fCapType; } + + /** Sets the geometry drawn at the beginning and end of strokes. + + example: https://fiddle.skia.org/c/@Paint_setStrokeCap_a + example: https://fiddle.skia.org/c/@Paint_setStrokeCap_b + */ + void setStrokeCap(Cap cap); + + /** Returns the geometry drawn at the corners of strokes. + */ + Join getStrokeJoin() const { return (Join)fBitfields.fJoinType; } + + /** Sets the geometry drawn at the corners of strokes. + + example: https://fiddle.skia.org/c/@Paint_setStrokeJoin + */ + void setStrokeJoin(Join join); + + /** Returns optional colors used when filling a path, such as a gradient. + + Does not alter SkShader SkRefCnt. + + @return SkShader if previously set, nullptr otherwise + */ + SkShader* getShader() const { return fShader.get(); } + + /** Returns optional colors used when filling a path, such as a gradient. + + Increases SkShader SkRefCnt by one. + + @return SkShader if previously set, nullptr otherwise + + example: https://fiddle.skia.org/c/@Paint_refShader + */ + sk_sp refShader() const; + + /** Sets optional colors used when filling a path, such as a gradient. + + Sets SkShader to shader, decreasing SkRefCnt of the previous SkShader. + Increments shader SkRefCnt by one. + + @param shader how geometry is filled with color; if nullptr, color is used instead + + example: https://fiddle.skia.org/c/@Color_Filter_Methods + example: https://fiddle.skia.org/c/@Paint_setShader + */ + void setShader(sk_sp shader); + + /** Returns SkColorFilter if set, or nullptr. + Does not alter SkColorFilter SkRefCnt. + + @return SkColorFilter if previously set, nullptr otherwise + */ + SkColorFilter* getColorFilter() const { return fColorFilter.get(); } + + /** Returns SkColorFilter if set, or nullptr. + Increases SkColorFilter SkRefCnt by one. + + @return SkColorFilter if set, or nullptr + + example: https://fiddle.skia.org/c/@Paint_refColorFilter + */ + sk_sp refColorFilter() const; + + /** Sets SkColorFilter to filter, decreasing SkRefCnt of the previous + SkColorFilter. Pass nullptr to clear SkColorFilter. + + Increments filter SkRefCnt by one. + + @param colorFilter SkColorFilter to apply to subsequent draw + + example: https://fiddle.skia.org/c/@Blend_Mode_Methods + example: https://fiddle.skia.org/c/@Paint_setColorFilter + */ + void setColorFilter(sk_sp colorFilter); + + /** If the current blender can be represented as a SkBlendMode enum, this returns that + * enum in the optional's value(). If it cannot, then the returned optional does not + * contain a value. + */ + std::optional asBlendMode() const; + + /** + * Queries the blender, and if it can be represented as a SkBlendMode, return that mode, + * else return the defaultMode provided. + */ + SkBlendMode getBlendMode_or(SkBlendMode defaultMode) const; + + /** Returns true iff the current blender claims to be equivalent to SkBlendMode::kSrcOver. + * + * Also returns true of the current blender is nullptr. + */ + bool isSrcOver() const; + + /** Helper method for calling setBlender(). + * + * This sets a blender that implements the specified blendmode enum. + */ + void setBlendMode(SkBlendMode mode); + + /** Returns the user-supplied blend function, if one has been set. + * Does not alter SkBlender's SkRefCnt. + * + * A nullptr blender signifies the default SrcOver behavior. + * + * @return the SkBlender assigned to this paint, otherwise nullptr + */ + SkBlender* getBlender() const { return fBlender.get(); } + + /** Returns the user-supplied blend function, if one has been set. + * Increments the SkBlender's SkRefCnt by one. + * + * A nullptr blender signifies the default SrcOver behavior. + * + * @return the SkBlender assigned to this paint, otherwise nullptr + */ + sk_sp refBlender() const; + + /** Sets the current blender, increasing its refcnt, and if a blender is already + * present, decreasing that object's refcnt. + * + * A nullptr blender signifies the default SrcOver behavior. + * + * For convenience, you can call setBlendMode() if the blend effect can be expressed + * as one of those values. + */ + void setBlender(sk_sp blender); + + /** Returns SkPathEffect if set, or nullptr. + Does not alter SkPathEffect SkRefCnt. + + @return SkPathEffect if previously set, nullptr otherwise + */ + SkPathEffect* getPathEffect() const { return fPathEffect.get(); } + + /** Returns SkPathEffect if set, or nullptr. + Increases SkPathEffect SkRefCnt by one. + + @return SkPathEffect if previously set, nullptr otherwise + + example: https://fiddle.skia.org/c/@Paint_refPathEffect + */ + sk_sp refPathEffect() const; + + /** Sets SkPathEffect to pathEffect, decreasing SkRefCnt of the previous + SkPathEffect. Pass nullptr to leave the path geometry unaltered. + + Increments pathEffect SkRefCnt by one. + + @param pathEffect replace SkPath with a modification when drawn + + example: https://fiddle.skia.org/c/@Mask_Filter_Methods + example: https://fiddle.skia.org/c/@Paint_setPathEffect + */ + void setPathEffect(sk_sp pathEffect); + + /** Returns SkMaskFilter if set, or nullptr. + Does not alter SkMaskFilter SkRefCnt. + + @return SkMaskFilter if previously set, nullptr otherwise + */ + SkMaskFilter* getMaskFilter() const { return fMaskFilter.get(); } + + /** Returns SkMaskFilter if set, or nullptr. + + Increases SkMaskFilter SkRefCnt by one. + + @return SkMaskFilter if previously set, nullptr otherwise + + example: https://fiddle.skia.org/c/@Paint_refMaskFilter + */ + sk_sp refMaskFilter() const; + + /** Sets SkMaskFilter to maskFilter, decreasing SkRefCnt of the previous + SkMaskFilter. Pass nullptr to clear SkMaskFilter and leave SkMaskFilter effect on + mask alpha unaltered. + + Increments maskFilter SkRefCnt by one. + + @param maskFilter modifies clipping mask generated from drawn geometry + + example: https://fiddle.skia.org/c/@Paint_setMaskFilter + example: https://fiddle.skia.org/c/@Typeface_Methods + */ + void setMaskFilter(sk_sp maskFilter); + + /** Returns SkImageFilter if set, or nullptr. + Does not alter SkImageFilter SkRefCnt. + + @return SkImageFilter if previously set, nullptr otherwise + */ + SkImageFilter* getImageFilter() const { return fImageFilter.get(); } + + /** Returns SkImageFilter if set, or nullptr. + Increases SkImageFilter SkRefCnt by one. + + @return SkImageFilter if previously set, nullptr otherwise + + example: https://fiddle.skia.org/c/@Paint_refImageFilter + */ + sk_sp refImageFilter() const; + + /** Sets SkImageFilter to imageFilter, decreasing SkRefCnt of the previous + SkImageFilter. Pass nullptr to clear SkImageFilter, and remove SkImageFilter effect + on drawing. + + Increments imageFilter SkRefCnt by one. + + @param imageFilter how SkImage is sampled when transformed + + example: https://fiddle.skia.org/c/@Paint_setImageFilter + */ + void setImageFilter(sk_sp imageFilter); + + /** Returns true if SkPaint prevents all drawing; + otherwise, the SkPaint may or may not allow drawing. + + Returns true if, for example, SkBlendMode combined with alpha computes a + new alpha of zero. + + @return true if SkPaint prevents all drawing + + example: https://fiddle.skia.org/c/@Paint_nothingToDraw + */ + bool nothingToDraw() const; + + /** (to be made private) + Returns true if SkPaint does not include elements requiring extensive computation + to compute SkBaseDevice bounds of drawn geometry. For instance, SkPaint with SkPathEffect + always returns false. + + @return true if SkPaint allows for fast computation of bounds + */ + bool canComputeFastBounds() const; + + /** (to be made private) + Only call this if canComputeFastBounds() returned true. This takes a + raw rectangle (the raw bounds of a shape), and adjusts it for stylistic + effects in the paint (e.g. stroking). If needed, it uses the storage + parameter. It returns the adjusted bounds that can then be used + for SkCanvas::quickReject tests. + + The returned SkRect will either be orig or storage, thus the caller + should not rely on storage being set to the result, but should always + use the returned value. It is legal for orig and storage to be the same + SkRect. + For example: + if (!path.isInverseFillType() && paint.canComputeFastBounds()) { + SkRect storage; + if (canvas->quickReject(paint.computeFastBounds(path.getBounds(), &storage))) { + return; // do not draw the path + } + } + // draw the path + + @param orig geometry modified by SkPaint when drawn + @param storage computed bounds of geometry; may not be nullptr + @return fast computed bounds + */ + const SkRect& computeFastBounds(const SkRect& orig, SkRect* storage) const; + + /** (to be made private) + + @param orig geometry modified by SkPaint when drawn + @param storage computed bounds of geometry + @return fast computed bounds + */ + const SkRect& computeFastStrokeBounds(const SkRect& orig, + SkRect* storage) const { + return this->doComputeFastBounds(orig, storage, kStroke_Style); + } + + /** (to be made private) + Computes the bounds, overriding the SkPaint SkPaint::Style. This can be used to + account for additional width required by stroking orig, without + altering SkPaint::Style set to fill. + + @param orig geometry modified by SkPaint when drawn + @param storage computed bounds of geometry + @param style overrides SkPaint::Style + @return fast computed bounds + */ + const SkRect& doComputeFastBounds(const SkRect& orig, SkRect* storage, + Style style) const; + + using sk_is_trivially_relocatable = std::true_type; + +private: + sk_sp fPathEffect; + sk_sp fShader; + sk_sp fMaskFilter; + sk_sp fColorFilter; + sk_sp fImageFilter; + sk_sp fBlender; + + SkColor4f fColor4f; + SkScalar fWidth; + SkScalar fMiterLimit; + union { + struct { + unsigned fAntiAlias : 1; + unsigned fDither : 1; + unsigned fCapType : 2; + unsigned fJoinType : 2; + unsigned fStyle : 2; + unsigned fPadding : 24; // 24 == 32 -1-1-2-2-2 + } fBitfields; + uint32_t fBitfieldsUInt; + }; + + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + + friend class SkPaintPriv; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPath.h b/gfx/skia/skia/include/core/SkPath.h new file mode 100644 index 0000000000..8858e7d3c8 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPath.h @@ -0,0 +1,1890 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPath_DEFINED +#define SkPath_DEFINED + +#include "include/core/SkMatrix.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTo.h" +#include "include/private/base/SkTypeTraits.h" + +#include +#include +#include +#include +#include +#include + +class SkData; +class SkPathRef; +class SkRRect; +class SkWStream; +enum class SkPathConvexity; +enum class SkPathFirstDirection; + +// WIP -- define this locally, and fix call-sites to use SkPathBuilder (skbug.com/9000) +//#define SK_HIDE_PATH_EDIT_METHODS + +/** \class SkPath + SkPath contain geometry. SkPath may be empty, or contain one or more verbs that + outline a figure. SkPath always starts with a move verb to a Cartesian coordinate, + and may be followed by additional verbs that add lines or curves. + Adding a close verb makes the geometry into a continuous loop, a closed contour. + SkPath may contain any number of contours, each beginning with a move verb. + + SkPath contours may contain only a move verb, or may also contain lines, + quadratic beziers, conics, and cubic beziers. SkPath contours may be open or + closed. + + When used to draw a filled area, SkPath describes whether the fill is inside or + outside the geometry. SkPath also describes the winding rule used to fill + overlapping contours. + + Internally, SkPath lazily computes metrics likes bounds and convexity. Call + SkPath::updateBoundsCache to make SkPath thread safe. +*/ +class SK_API SkPath { +public: + /** + * Create a new path with the specified segments. + * + * The points and weights arrays are read in order, based on the sequence of verbs. + * + * Move 1 point + * Line 1 point + * Quad 2 points + * Conic 2 points and 1 weight + * Cubic 3 points + * Close 0 points + * + * If an illegal sequence of verbs is encountered, or the specified number of points + * or weights is not sufficient given the verbs, an empty Path is returned. + * + * A legal sequence of verbs consists of any number of Contours. A contour always begins + * with a Move verb, followed by 0 or more segments: Line, Quad, Conic, Cubic, followed + * by an optional Close. + */ + static SkPath Make(const SkPoint[], int pointCount, + const uint8_t[], int verbCount, + const SkScalar[], int conicWeightCount, + SkPathFillType, bool isVolatile = false); + + static SkPath Rect(const SkRect&, SkPathDirection = SkPathDirection::kCW, + unsigned startIndex = 0); + static SkPath Oval(const SkRect&, SkPathDirection = SkPathDirection::kCW); + static SkPath Oval(const SkRect&, SkPathDirection, unsigned startIndex); + static SkPath Circle(SkScalar center_x, SkScalar center_y, SkScalar radius, + SkPathDirection dir = SkPathDirection::kCW); + static SkPath RRect(const SkRRect&, SkPathDirection dir = SkPathDirection::kCW); + static SkPath RRect(const SkRRect&, SkPathDirection, unsigned startIndex); + static SkPath RRect(const SkRect& bounds, SkScalar rx, SkScalar ry, + SkPathDirection dir = SkPathDirection::kCW); + + static SkPath Polygon(const SkPoint pts[], int count, bool isClosed, + SkPathFillType = SkPathFillType::kWinding, + bool isVolatile = false); + + static SkPath Polygon(const std::initializer_list& list, bool isClosed, + SkPathFillType fillType = SkPathFillType::kWinding, + bool isVolatile = false) { + return Polygon(list.begin(), SkToInt(list.size()), isClosed, fillType, isVolatile); + } + + static SkPath Line(const SkPoint a, const SkPoint b) { + return Polygon({a, b}, false); + } + + /** Constructs an empty SkPath. By default, SkPath has no verbs, no SkPoint, and no weights. + FillType is set to kWinding. + + @return empty SkPath + + example: https://fiddle.skia.org/c/@Path_empty_constructor + */ + SkPath(); + + /** Constructs a copy of an existing path. + Copy constructor makes two paths identical by value. Internally, path and + the returned result share pointer values. The underlying verb array, SkPoint array + and weights are copied when modified. + + Creating a SkPath copy is very efficient and never allocates memory. + SkPath are always copied by value from the interface; the underlying shared + pointers are not exposed. + + @param path SkPath to copy by value + @return copy of SkPath + + example: https://fiddle.skia.org/c/@Path_copy_const_SkPath + */ + SkPath(const SkPath& path); + + /** Releases ownership of any shared data and deletes data if SkPath is sole owner. + + example: https://fiddle.skia.org/c/@Path_destructor + */ + ~SkPath(); + + /** Constructs a copy of an existing path. + SkPath assignment makes two paths identical by value. Internally, assignment + shares pointer values. The underlying verb array, SkPoint array and weights + are copied when modified. + + Copying SkPath by assignment is very efficient and never allocates memory. + SkPath are always copied by value from the interface; the underlying shared + pointers are not exposed. + + @param path verb array, SkPoint array, weights, and SkPath::FillType to copy + @return SkPath copied by value + + example: https://fiddle.skia.org/c/@Path_copy_operator + */ + SkPath& operator=(const SkPath& path); + + /** Compares a and b; returns true if SkPath::FillType, verb array, SkPoint array, and weights + are equivalent. + + @param a SkPath to compare + @param b SkPath to compare + @return true if SkPath pair are equivalent + */ + friend SK_API bool operator==(const SkPath& a, const SkPath& b); + + /** Compares a and b; returns true if SkPath::FillType, verb array, SkPoint array, and weights + are not equivalent. + + @param a SkPath to compare + @param b SkPath to compare + @return true if SkPath pair are not equivalent + */ + friend bool operator!=(const SkPath& a, const SkPath& b) { + return !(a == b); + } + + /** Returns true if SkPath contain equal verbs and equal weights. + If SkPath contain one or more conics, the weights must match. + + conicTo() may add different verbs depending on conic weight, so it is not + trivial to interpolate a pair of SkPath containing conics with different + conic weight values. + + @param compare SkPath to compare + @return true if SkPath verb array and weights are equivalent + + example: https://fiddle.skia.org/c/@Path_isInterpolatable + */ + bool isInterpolatable(const SkPath& compare) const; + + /** Interpolates between SkPath with SkPoint array of equal size. + Copy verb array and weights to out, and set out SkPoint array to a weighted + average of this SkPoint array and ending SkPoint array, using the formula: + (Path Point * weight) + ending Point * (1 - weight). + + weight is most useful when between zero (ending SkPoint array) and + one (this Point_Array); will work with values outside of this + range. + + interpolate() returns false and leaves out unchanged if SkPoint array is not + the same size as ending SkPoint array. Call isInterpolatable() to check SkPath + compatibility prior to calling interpolate(). + + @param ending SkPoint array averaged with this SkPoint array + @param weight contribution of this SkPoint array, and + one minus contribution of ending SkPoint array + @param out SkPath replaced by interpolated averages + @return true if SkPath contain same number of SkPoint + + example: https://fiddle.skia.org/c/@Path_interpolate + */ + bool interpolate(const SkPath& ending, SkScalar weight, SkPath* out) const; + + /** Returns SkPathFillType, the rule used to fill SkPath. + + @return current SkPathFillType setting + */ + SkPathFillType getFillType() const { return (SkPathFillType)fFillType; } + + /** Sets FillType, the rule used to fill SkPath. While there is no check + that ft is legal, values outside of FillType are not supported. + */ + void setFillType(SkPathFillType ft) { + fFillType = SkToU8(ft); + } + + /** Returns if FillType describes area outside SkPath geometry. The inverse fill area + extends indefinitely. + + @return true if FillType is kInverseWinding or kInverseEvenOdd + */ + bool isInverseFillType() const { return SkPathFillType_IsInverse(this->getFillType()); } + + /** Replaces FillType with its inverse. The inverse of FillType describes the area + unmodified by the original FillType. + */ + void toggleInverseFillType() { + fFillType ^= 2; + } + + /** Returns true if the path is convex. If necessary, it will first compute the convexity. + */ + bool isConvex() const; + + /** Returns true if this path is recognized as an oval or circle. + + bounds receives bounds of oval. + + bounds is unmodified if oval is not found. + + @param bounds storage for bounding SkRect of oval; may be nullptr + @return true if SkPath is recognized as an oval or circle + + example: https://fiddle.skia.org/c/@Path_isOval + */ + bool isOval(SkRect* bounds) const; + + /** Returns true if path is representable as SkRRect. + Returns false if path is representable as oval, circle, or SkRect. + + rrect receives bounds of SkRRect. + + rrect is unmodified if SkRRect is not found. + + @param rrect storage for bounding SkRect of SkRRect; may be nullptr + @return true if SkPath contains only SkRRect + + example: https://fiddle.skia.org/c/@Path_isRRect + */ + bool isRRect(SkRRect* rrect) const; + + /** Sets SkPath to its initial state. + Removes verb array, SkPoint array, and weights, and sets FillType to kWinding. + Internal storage associated with SkPath is released. + + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_reset + */ + SkPath& reset(); + + /** Sets SkPath to its initial state, preserving internal storage. + Removes verb array, SkPoint array, and weights, and sets FillType to kWinding. + Internal storage associated with SkPath is retained. + + Use rewind() instead of reset() if SkPath storage will be reused and performance + is critical. + + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_rewind + */ + SkPath& rewind(); + + /** Returns if SkPath is empty. + Empty SkPath may have FillType but has no SkPoint, SkPath::Verb, or conic weight. + SkPath() constructs empty SkPath; reset() and rewind() make SkPath empty. + + @return true if the path contains no SkPath::Verb array + */ + bool isEmpty() const; + + /** Returns if contour is closed. + Contour is closed if SkPath SkPath::Verb array was last modified by close(). When stroked, + closed contour draws SkPaint::Join instead of SkPaint::Cap at first and last SkPoint. + + @return true if the last contour ends with a kClose_Verb + + example: https://fiddle.skia.org/c/@Path_isLastContourClosed + */ + bool isLastContourClosed() const; + + /** Returns true for finite SkPoint array values between negative SK_ScalarMax and + positive SK_ScalarMax. Returns false for any SkPoint array value of + SK_ScalarInfinity, SK_ScalarNegativeInfinity, or SK_ScalarNaN. + + @return true if all SkPoint values are finite + */ + bool isFinite() const; + + /** Returns true if the path is volatile; it will not be altered or discarded + by the caller after it is drawn. SkPath by default have volatile set false, allowing + SkSurface to attach a cache of data which speeds repeated drawing. If true, SkSurface + may not speed repeated drawing. + + @return true if caller will alter SkPath after drawing + */ + bool isVolatile() const { + return SkToBool(fIsVolatile); + } + + /** Specifies whether SkPath is volatile; whether it will be altered or discarded + by the caller after it is drawn. SkPath by default have volatile set false, allowing + SkBaseDevice to attach a cache of data which speeds repeated drawing. + + Mark temporary paths, discarded or modified after use, as volatile + to inform SkBaseDevice that the path need not be cached. + + Mark animating SkPath volatile to improve performance. + Mark unchanging SkPath non-volatile to improve repeated rendering. + + raster surface SkPath draws are affected by volatile for some shadows. + GPU surface SkPath draws are affected by volatile for some shadows and concave geometries. + + @param isVolatile true if caller will alter SkPath after drawing + @return reference to SkPath + */ + SkPath& setIsVolatile(bool isVolatile) { + fIsVolatile = isVolatile; + return *this; + } + + /** Tests if line between SkPoint pair is degenerate. + Line with no length or that moves a very short distance is degenerate; it is + treated as a point. + + exact changes the equality test. If true, returns true only if p1 equals p2. + If false, returns true if p1 equals or nearly equals p2. + + @param p1 line start point + @param p2 line end point + @param exact if false, allow nearly equals + @return true if line is degenerate; its length is effectively zero + + example: https://fiddle.skia.org/c/@Path_IsLineDegenerate + */ + static bool IsLineDegenerate(const SkPoint& p1, const SkPoint& p2, bool exact); + + /** Tests if quad is degenerate. + Quad with no length or that moves a very short distance is degenerate; it is + treated as a point. + + @param p1 quad start point + @param p2 quad control point + @param p3 quad end point + @param exact if true, returns true only if p1, p2, and p3 are equal; + if false, returns true if p1, p2, and p3 are equal or nearly equal + @return true if quad is degenerate; its length is effectively zero + */ + static bool IsQuadDegenerate(const SkPoint& p1, const SkPoint& p2, + const SkPoint& p3, bool exact); + + /** Tests if cubic is degenerate. + Cubic with no length or that moves a very short distance is degenerate; it is + treated as a point. + + @param p1 cubic start point + @param p2 cubic control point 1 + @param p3 cubic control point 2 + @param p4 cubic end point + @param exact if true, returns true only if p1, p2, p3, and p4 are equal; + if false, returns true if p1, p2, p3, and p4 are equal or nearly equal + @return true if cubic is degenerate; its length is effectively zero + */ + static bool IsCubicDegenerate(const SkPoint& p1, const SkPoint& p2, + const SkPoint& p3, const SkPoint& p4, bool exact); + + /** Returns true if SkPath contains only one line; + SkPath::Verb array has two entries: kMove_Verb, kLine_Verb. + If SkPath contains one line and line is not nullptr, line is set to + line start point and line end point. + Returns false if SkPath is not one line; line is unaltered. + + @param line storage for line. May be nullptr + @return true if SkPath contains exactly one line + + example: https://fiddle.skia.org/c/@Path_isLine + */ + bool isLine(SkPoint line[2]) const; + + /** Returns the number of points in SkPath. + SkPoint count is initially zero. + + @return SkPath SkPoint array length + + example: https://fiddle.skia.org/c/@Path_countPoints + */ + int countPoints() const; + + /** Returns SkPoint at index in SkPoint array. Valid range for index is + 0 to countPoints() - 1. + Returns (0, 0) if index is out of range. + + @param index SkPoint array element selector + @return SkPoint array value or (0, 0) + + example: https://fiddle.skia.org/c/@Path_getPoint + */ + SkPoint getPoint(int index) const; + + /** Returns number of points in SkPath. Up to max points are copied. + points may be nullptr; then, max must be zero. + If max is greater than number of points, excess points storage is unaltered. + + @param points storage for SkPath SkPoint array. May be nullptr + @param max maximum to copy; must be greater than or equal to zero + @return SkPath SkPoint array length + + example: https://fiddle.skia.org/c/@Path_getPoints + */ + int getPoints(SkPoint points[], int max) const; + + /** Returns the number of verbs: kMove_Verb, kLine_Verb, kQuad_Verb, kConic_Verb, + kCubic_Verb, and kClose_Verb; added to SkPath. + + @return length of verb array + + example: https://fiddle.skia.org/c/@Path_countVerbs + */ + int countVerbs() const; + + /** Returns the number of verbs in the path. Up to max verbs are copied. The + verbs are copied as one byte per verb. + + @param verbs storage for verbs, may be nullptr + @param max maximum number to copy into verbs + @return the actual number of verbs in the path + + example: https://fiddle.skia.org/c/@Path_getVerbs + */ + int getVerbs(uint8_t verbs[], int max) const; + + /** Returns the approximate byte size of the SkPath in memory. + + @return approximate size + */ + size_t approximateBytesUsed() const; + + /** Exchanges the verb array, SkPoint array, weights, and SkPath::FillType with other. + Cached state is also exchanged. swap() internally exchanges pointers, so + it is lightweight and does not allocate memory. + + swap() usage has largely been replaced by operator=(const SkPath& path). + SkPath do not copy their content on assignment until they are written to, + making assignment as efficient as swap(). + + @param other SkPath exchanged by value + + example: https://fiddle.skia.org/c/@Path_swap + */ + void swap(SkPath& other); + + /** Returns minimum and maximum axes values of SkPoint array. + Returns (0, 0, 0, 0) if SkPath contains no points. Returned bounds width and height may + be larger or smaller than area affected when SkPath is drawn. + + SkRect returned includes all SkPoint added to SkPath, including SkPoint associated with + kMove_Verb that define empty contours. + + @return bounds of all SkPoint in SkPoint array + */ + const SkRect& getBounds() const; + + /** Updates internal bounds so that subsequent calls to getBounds() are instantaneous. + Unaltered copies of SkPath may also access cached bounds through getBounds(). + + For now, identical to calling getBounds() and ignoring the returned value. + + Call to prepare SkPath subsequently drawn from multiple threads, + to avoid a race condition where each draw separately computes the bounds. + */ + void updateBoundsCache() const { + // for now, just calling getBounds() is sufficient + this->getBounds(); + } + + /** Returns minimum and maximum axes values of the lines and curves in SkPath. + Returns (0, 0, 0, 0) if SkPath contains no points. + Returned bounds width and height may be larger or smaller than area affected + when SkPath is drawn. + + Includes SkPoint associated with kMove_Verb that define empty + contours. + + Behaves identically to getBounds() when SkPath contains + only lines. If SkPath contains curves, computed bounds includes + the maximum extent of the quad, conic, or cubic; is slower than getBounds(); + and unlike getBounds(), does not cache the result. + + @return tight bounds of curves in SkPath + + example: https://fiddle.skia.org/c/@Path_computeTightBounds + */ + SkRect computeTightBounds() const; + + /** Returns true if rect is contained by SkPath. + May return false when rect is contained by SkPath. + + For now, only returns true if SkPath has one contour and is convex. + rect may share points and edges with SkPath and be contained. + Returns true if rect is empty, that is, it has zero width or height; and + the SkPoint or line described by rect is contained by SkPath. + + @param rect SkRect, line, or SkPoint checked for containment + @return true if rect is contained + + example: https://fiddle.skia.org/c/@Path_conservativelyContainsRect + */ + bool conservativelyContainsRect(const SkRect& rect) const; + + /** Grows SkPath verb array and SkPoint array to contain extraPtCount additional SkPoint. + May improve performance and use less memory by + reducing the number and size of allocations when creating SkPath. + + @param extraPtCount number of additional SkPoint to allocate + + example: https://fiddle.skia.org/c/@Path_incReserve + */ + void incReserve(int extraPtCount); + +#ifdef SK_HIDE_PATH_EDIT_METHODS +private: +#endif + + /** Adds beginning of contour at SkPoint (x, y). + + @param x x-axis value of contour start + @param y y-axis value of contour start + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_moveTo + */ + SkPath& moveTo(SkScalar x, SkScalar y); + + /** Adds beginning of contour at SkPoint p. + + @param p contour start + @return reference to SkPath + */ + SkPath& moveTo(const SkPoint& p) { + return this->moveTo(p.fX, p.fY); + } + + /** Adds beginning of contour relative to last point. + If SkPath is empty, starts contour at (dx, dy). + Otherwise, start contour at last point offset by (dx, dy). + Function name stands for "relative move to". + + @param dx offset from last point to contour start on x-axis + @param dy offset from last point to contour start on y-axis + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_rMoveTo + */ + SkPath& rMoveTo(SkScalar dx, SkScalar dy); + + /** Adds line from last point to (x, y). If SkPath is empty, or last SkPath::Verb is + kClose_Verb, last point is set to (0, 0) before adding line. + + lineTo() appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed. + lineTo() then appends kLine_Verb to verb array and (x, y) to SkPoint array. + + @param x end of added line on x-axis + @param y end of added line on y-axis + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_lineTo + */ + SkPath& lineTo(SkScalar x, SkScalar y); + + /** Adds line from last point to SkPoint p. If SkPath is empty, or last SkPath::Verb is + kClose_Verb, last point is set to (0, 0) before adding line. + + lineTo() first appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed. + lineTo() then appends kLine_Verb to verb array and SkPoint p to SkPoint array. + + @param p end SkPoint of added line + @return reference to SkPath + */ + SkPath& lineTo(const SkPoint& p) { + return this->lineTo(p.fX, p.fY); + } + + /** Adds line from last point to vector (dx, dy). If SkPath is empty, or last SkPath::Verb is + kClose_Verb, last point is set to (0, 0) before adding line. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed; + then appends kLine_Verb to verb array and line end to SkPoint array. + Line end is last point plus vector (dx, dy). + Function name stands for "relative line to". + + @param dx offset from last point to line end on x-axis + @param dy offset from last point to line end on y-axis + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_rLineTo + example: https://fiddle.skia.org/c/@Quad_a + example: https://fiddle.skia.org/c/@Quad_b + */ + SkPath& rLineTo(SkScalar dx, SkScalar dy); + + /** Adds quad from last point towards (x1, y1), to (x2, y2). + If SkPath is empty, or last SkPath::Verb is kClose_Verb, last point is set to (0, 0) + before adding quad. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed; + then appends kQuad_Verb to verb array; and (x1, y1), (x2, y2) + to SkPoint array. + + @param x1 control SkPoint of quad on x-axis + @param y1 control SkPoint of quad on y-axis + @param x2 end SkPoint of quad on x-axis + @param y2 end SkPoint of quad on y-axis + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_quadTo + */ + SkPath& quadTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2); + + /** Adds quad from last point towards SkPoint p1, to SkPoint p2. + If SkPath is empty, or last SkPath::Verb is kClose_Verb, last point is set to (0, 0) + before adding quad. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed; + then appends kQuad_Verb to verb array; and SkPoint p1, p2 + to SkPoint array. + + @param p1 control SkPoint of added quad + @param p2 end SkPoint of added quad + @return reference to SkPath + */ + SkPath& quadTo(const SkPoint& p1, const SkPoint& p2) { + return this->quadTo(p1.fX, p1.fY, p2.fX, p2.fY); + } + + /** Adds quad from last point towards vector (dx1, dy1), to vector (dx2, dy2). + If SkPath is empty, or last SkPath::Verb + is kClose_Verb, last point is set to (0, 0) before adding quad. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, + if needed; then appends kQuad_Verb to verb array; and appends quad + control and quad end to SkPoint array. + Quad control is last point plus vector (dx1, dy1). + Quad end is last point plus vector (dx2, dy2). + Function name stands for "relative quad to". + + @param dx1 offset from last point to quad control on x-axis + @param dy1 offset from last point to quad control on y-axis + @param dx2 offset from last point to quad end on x-axis + @param dy2 offset from last point to quad end on y-axis + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Conic_Weight_a + example: https://fiddle.skia.org/c/@Conic_Weight_b + example: https://fiddle.skia.org/c/@Conic_Weight_c + example: https://fiddle.skia.org/c/@Path_rQuadTo + */ + SkPath& rQuadTo(SkScalar dx1, SkScalar dy1, SkScalar dx2, SkScalar dy2); + + /** Adds conic from last point towards (x1, y1), to (x2, y2), weighted by w. + If SkPath is empty, or last SkPath::Verb is kClose_Verb, last point is set to (0, 0) + before adding conic. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed. + + If w is finite and not one, appends kConic_Verb to verb array; + and (x1, y1), (x2, y2) to SkPoint array; and w to conic weights. + + If w is one, appends kQuad_Verb to verb array, and + (x1, y1), (x2, y2) to SkPoint array. + + If w is not finite, appends kLine_Verb twice to verb array, and + (x1, y1), (x2, y2) to SkPoint array. + + @param x1 control SkPoint of conic on x-axis + @param y1 control SkPoint of conic on y-axis + @param x2 end SkPoint of conic on x-axis + @param y2 end SkPoint of conic on y-axis + @param w weight of added conic + @return reference to SkPath + */ + SkPath& conicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, + SkScalar w); + + /** Adds conic from last point towards SkPoint p1, to SkPoint p2, weighted by w. + If SkPath is empty, or last SkPath::Verb is kClose_Verb, last point is set to (0, 0) + before adding conic. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed. + + If w is finite and not one, appends kConic_Verb to verb array; + and SkPoint p1, p2 to SkPoint array; and w to conic weights. + + If w is one, appends kQuad_Verb to verb array, and SkPoint p1, p2 + to SkPoint array. + + If w is not finite, appends kLine_Verb twice to verb array, and + SkPoint p1, p2 to SkPoint array. + + @param p1 control SkPoint of added conic + @param p2 end SkPoint of added conic + @param w weight of added conic + @return reference to SkPath + */ + SkPath& conicTo(const SkPoint& p1, const SkPoint& p2, SkScalar w) { + return this->conicTo(p1.fX, p1.fY, p2.fX, p2.fY, w); + } + + /** Adds conic from last point towards vector (dx1, dy1), to vector (dx2, dy2), + weighted by w. If SkPath is empty, or last SkPath::Verb + is kClose_Verb, last point is set to (0, 0) before adding conic. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, + if needed. + + If w is finite and not one, next appends kConic_Verb to verb array, + and w is recorded as conic weight; otherwise, if w is one, appends + kQuad_Verb to verb array; or if w is not finite, appends kLine_Verb + twice to verb array. + + In all cases appends SkPoint control and end to SkPoint array. + control is last point plus vector (dx1, dy1). + end is last point plus vector (dx2, dy2). + + Function name stands for "relative conic to". + + @param dx1 offset from last point to conic control on x-axis + @param dy1 offset from last point to conic control on y-axis + @param dx2 offset from last point to conic end on x-axis + @param dy2 offset from last point to conic end on y-axis + @param w weight of added conic + @return reference to SkPath + */ + SkPath& rConicTo(SkScalar dx1, SkScalar dy1, SkScalar dx2, SkScalar dy2, + SkScalar w); + + /** Adds cubic from last point towards (x1, y1), then towards (x2, y2), ending at + (x3, y3). If SkPath is empty, or last SkPath::Verb is kClose_Verb, last point is set to + (0, 0) before adding cubic. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed; + then appends kCubic_Verb to verb array; and (x1, y1), (x2, y2), (x3, y3) + to SkPoint array. + + @param x1 first control SkPoint of cubic on x-axis + @param y1 first control SkPoint of cubic on y-axis + @param x2 second control SkPoint of cubic on x-axis + @param y2 second control SkPoint of cubic on y-axis + @param x3 end SkPoint of cubic on x-axis + @param y3 end SkPoint of cubic on y-axis + @return reference to SkPath + */ + SkPath& cubicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, + SkScalar x3, SkScalar y3); + + /** Adds cubic from last point towards SkPoint p1, then towards SkPoint p2, ending at + SkPoint p3. If SkPath is empty, or last SkPath::Verb is kClose_Verb, last point is set to + (0, 0) before adding cubic. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, if needed; + then appends kCubic_Verb to verb array; and SkPoint p1, p2, p3 + to SkPoint array. + + @param p1 first control SkPoint of cubic + @param p2 second control SkPoint of cubic + @param p3 end SkPoint of cubic + @return reference to SkPath + */ + SkPath& cubicTo(const SkPoint& p1, const SkPoint& p2, const SkPoint& p3) { + return this->cubicTo(p1.fX, p1.fY, p2.fX, p2.fY, p3.fX, p3.fY); + } + + /** Adds cubic from last point towards vector (dx1, dy1), then towards + vector (dx2, dy2), to vector (dx3, dy3). + If SkPath is empty, or last SkPath::Verb + is kClose_Verb, last point is set to (0, 0) before adding cubic. + + Appends kMove_Verb to verb array and (0, 0) to SkPoint array, + if needed; then appends kCubic_Verb to verb array; and appends cubic + control and cubic end to SkPoint array. + Cubic control is last point plus vector (dx1, dy1). + Cubic end is last point plus vector (dx2, dy2). + Function name stands for "relative cubic to". + + @param dx1 offset from last point to first cubic control on x-axis + @param dy1 offset from last point to first cubic control on y-axis + @param dx2 offset from last point to second cubic control on x-axis + @param dy2 offset from last point to second cubic control on y-axis + @param dx3 offset from last point to cubic end on x-axis + @param dy3 offset from last point to cubic end on y-axis + @return reference to SkPath + */ + SkPath& rCubicTo(SkScalar dx1, SkScalar dy1, SkScalar dx2, SkScalar dy2, + SkScalar dx3, SkScalar dy3); + + /** Appends arc to SkPath. Arc added is part of ellipse + bounded by oval, from startAngle through sweepAngle. Both startAngle and + sweepAngle are measured in degrees, where zero degrees is aligned with the + positive x-axis, and positive sweeps extends arc clockwise. + + arcTo() adds line connecting SkPath last SkPoint to initial arc SkPoint if forceMoveTo + is false and SkPath is not empty. Otherwise, added contour begins with first point + of arc. Angles greater than -360 and less than 360 are treated modulo 360. + + @param oval bounds of ellipse containing arc + @param startAngle starting angle of arc in degrees + @param sweepAngle sweep, in degrees. Positive is clockwise; treated modulo 360 + @param forceMoveTo true to start a new contour with arc + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_arcTo + */ + SkPath& arcTo(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, bool forceMoveTo); + + /** Appends arc to SkPath, after appending line if needed. Arc is implemented by conic + weighted to describe part of circle. Arc is contained by tangent from + last SkPath point to (x1, y1), and tangent from (x1, y1) to (x2, y2). Arc + is part of circle sized to radius, positioned so it touches both tangent lines. + + If last Path Point does not start Arc, arcTo appends connecting Line to Path. + The length of Vector from (x1, y1) to (x2, y2) does not affect Arc. + + Arc sweep is always less than 180 degrees. If radius is zero, or if + tangents are nearly parallel, arcTo appends Line from last Path Point to (x1, y1). + + arcTo appends at most one Line and one conic. + arcTo implements the functionality of PostScript arct and HTML Canvas arcTo. + + @param x1 x-axis value common to pair of tangents + @param y1 y-axis value common to pair of tangents + @param x2 x-axis value end of second tangent + @param y2 y-axis value end of second tangent + @param radius distance from arc to circle center + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_arcTo_2_a + example: https://fiddle.skia.org/c/@Path_arcTo_2_b + example: https://fiddle.skia.org/c/@Path_arcTo_2_c + */ + SkPath& arcTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, SkScalar radius); + + /** Appends arc to SkPath, after appending line if needed. Arc is implemented by conic + weighted to describe part of circle. Arc is contained by tangent from + last SkPath point to p1, and tangent from p1 to p2. Arc + is part of circle sized to radius, positioned so it touches both tangent lines. + + If last SkPath SkPoint does not start arc, arcTo() appends connecting line to SkPath. + The length of vector from p1 to p2 does not affect arc. + + Arc sweep is always less than 180 degrees. If radius is zero, or if + tangents are nearly parallel, arcTo() appends line from last SkPath SkPoint to p1. + + arcTo() appends at most one line and one conic. + arcTo() implements the functionality of PostScript arct and HTML Canvas arcTo. + + @param p1 SkPoint common to pair of tangents + @param p2 end of second tangent + @param radius distance from arc to circle center + @return reference to SkPath + */ + SkPath& arcTo(const SkPoint p1, const SkPoint p2, SkScalar radius) { + return this->arcTo(p1.fX, p1.fY, p2.fX, p2.fY, radius); + } + + /** \enum SkPath::ArcSize + Four oval parts with radii (rx, ry) start at last SkPath SkPoint and ends at (x, y). + ArcSize and Direction select one of the four oval parts. + */ + enum ArcSize { + kSmall_ArcSize, //!< smaller of arc pair + kLarge_ArcSize, //!< larger of arc pair + }; + + /** Appends arc to SkPath. Arc is implemented by one or more conics weighted to + describe part of oval with radii (rx, ry) rotated by xAxisRotate degrees. Arc + curves from last SkPath SkPoint to (x, y), choosing one of four possible routes: + clockwise or counterclockwise, and smaller or larger. + + Arc sweep is always less than 360 degrees. arcTo() appends line to (x, y) if + either radii are zero, or if last SkPath SkPoint equals (x, y). arcTo() scales radii + (rx, ry) to fit last SkPath SkPoint and (x, y) if both are greater than zero but + too small. + + arcTo() appends up to four conic curves. + arcTo() implements the functionality of SVG arc, although SVG sweep-flag value + is opposite the integer value of sweep; SVG sweep-flag uses 1 for clockwise, + while kCW_Direction cast to int is zero. + + @param rx radius on x-axis before x-axis rotation + @param ry radius on y-axis before x-axis rotation + @param xAxisRotate x-axis rotation in degrees; positive values are clockwise + @param largeArc chooses smaller or larger arc + @param sweep chooses clockwise or counterclockwise arc + @param x end of arc + @param y end of arc + @return reference to SkPath + */ + SkPath& arcTo(SkScalar rx, SkScalar ry, SkScalar xAxisRotate, ArcSize largeArc, + SkPathDirection sweep, SkScalar x, SkScalar y); + + /** Appends arc to SkPath. Arc is implemented by one or more conic weighted to describe + part of oval with radii (r.fX, r.fY) rotated by xAxisRotate degrees. Arc curves + from last SkPath SkPoint to (xy.fX, xy.fY), choosing one of four possible routes: + clockwise or counterclockwise, + and smaller or larger. + + Arc sweep is always less than 360 degrees. arcTo() appends line to xy if either + radii are zero, or if last SkPath SkPoint equals (xy.fX, xy.fY). arcTo() scales radii r to + fit last SkPath SkPoint and xy if both are greater than zero but too small to describe + an arc. + + arcTo() appends up to four conic curves. + arcTo() implements the functionality of SVG arc, although SVG sweep-flag value is + opposite the integer value of sweep; SVG sweep-flag uses 1 for clockwise, while + kCW_Direction cast to int is zero. + + @param r radii on axes before x-axis rotation + @param xAxisRotate x-axis rotation in degrees; positive values are clockwise + @param largeArc chooses smaller or larger arc + @param sweep chooses clockwise or counterclockwise arc + @param xy end of arc + @return reference to SkPath + */ + SkPath& arcTo(const SkPoint r, SkScalar xAxisRotate, ArcSize largeArc, SkPathDirection sweep, + const SkPoint xy) { + return this->arcTo(r.fX, r.fY, xAxisRotate, largeArc, sweep, xy.fX, xy.fY); + } + + /** Appends arc to SkPath, relative to last SkPath SkPoint. Arc is implemented by one or + more conic, weighted to describe part of oval with radii (rx, ry) rotated by + xAxisRotate degrees. Arc curves from last SkPath SkPoint to relative end SkPoint: + (dx, dy), choosing one of four possible routes: clockwise or + counterclockwise, and smaller or larger. If SkPath is empty, the start arc SkPoint + is (0, 0). + + Arc sweep is always less than 360 degrees. arcTo() appends line to end SkPoint + if either radii are zero, or if last SkPath SkPoint equals end SkPoint. + arcTo() scales radii (rx, ry) to fit last SkPath SkPoint and end SkPoint if both are + greater than zero but too small to describe an arc. + + arcTo() appends up to four conic curves. + arcTo() implements the functionality of svg arc, although SVG "sweep-flag" value is + opposite the integer value of sweep; SVG "sweep-flag" uses 1 for clockwise, while + kCW_Direction cast to int is zero. + + @param rx radius before x-axis rotation + @param ry radius before x-axis rotation + @param xAxisRotate x-axis rotation in degrees; positive values are clockwise + @param largeArc chooses smaller or larger arc + @param sweep chooses clockwise or counterclockwise arc + @param dx x-axis offset end of arc from last SkPath SkPoint + @param dy y-axis offset end of arc from last SkPath SkPoint + @return reference to SkPath + */ + SkPath& rArcTo(SkScalar rx, SkScalar ry, SkScalar xAxisRotate, ArcSize largeArc, + SkPathDirection sweep, SkScalar dx, SkScalar dy); + + /** Appends kClose_Verb to SkPath. A closed contour connects the first and last SkPoint + with line, forming a continuous loop. Open and closed contour draw the same + with SkPaint::kFill_Style. With SkPaint::kStroke_Style, open contour draws + SkPaint::Cap at contour start and end; closed contour draws + SkPaint::Join at contour start and end. + + close() has no effect if SkPath is empty or last SkPath SkPath::Verb is kClose_Verb. + + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_close + */ + SkPath& close(); + +#ifdef SK_HIDE_PATH_EDIT_METHODS +public: +#endif + + /** Approximates conic with quad array. Conic is constructed from start SkPoint p0, + control SkPoint p1, end SkPoint p2, and weight w. + Quad array is stored in pts; this storage is supplied by caller. + Maximum quad count is 2 to the pow2. + Every third point in array shares last SkPoint of previous quad and first SkPoint of + next quad. Maximum pts storage size is given by: + (1 + 2 * (1 << pow2)) * sizeof(SkPoint). + + Returns quad count used the approximation, which may be smaller + than the number requested. + + conic weight determines the amount of influence conic control point has on the curve. + w less than one represents an elliptical section. w greater than one represents + a hyperbolic section. w equal to one represents a parabolic section. + + Two quad curves are sufficient to approximate an elliptical conic with a sweep + of up to 90 degrees; in this case, set pow2 to one. + + @param p0 conic start SkPoint + @param p1 conic control SkPoint + @param p2 conic end SkPoint + @param w conic weight + @param pts storage for quad array + @param pow2 quad count, as power of two, normally 0 to 5 (1 to 32 quad curves) + @return number of quad curves written to pts + */ + static int ConvertConicToQuads(const SkPoint& p0, const SkPoint& p1, const SkPoint& p2, + SkScalar w, SkPoint pts[], int pow2); + + /** Returns true if SkPath is equivalent to SkRect when filled. + If false: rect, isClosed, and direction are unchanged. + If true: rect, isClosed, and direction are written to if not nullptr. + + rect may be smaller than the SkPath bounds. SkPath bounds may include kMove_Verb points + that do not alter the area drawn by the returned rect. + + @param rect storage for bounds of SkRect; may be nullptr + @param isClosed storage set to true if SkPath is closed; may be nullptr + @param direction storage set to SkRect direction; may be nullptr + @return true if SkPath contains SkRect + + example: https://fiddle.skia.org/c/@Path_isRect + */ + bool isRect(SkRect* rect, bool* isClosed = nullptr, SkPathDirection* direction = nullptr) const; + +#ifdef SK_HIDE_PATH_EDIT_METHODS +private: +#endif + + /** Adds a new contour to the path, defined by the rect, and wound in the + specified direction. The verbs added to the path will be: + + kMove, kLine, kLine, kLine, kClose + + start specifies which corner to begin the contour: + 0: upper-left corner + 1: upper-right corner + 2: lower-right corner + 3: lower-left corner + + This start point also acts as the implied beginning of the subsequent, + contour, if it does not have an explicit moveTo(). e.g. + + path.addRect(...) + // if we don't say moveTo() here, we will use the rect's start point + path.lineTo(...) + + @param rect SkRect to add as a closed contour + @param dir SkPath::Direction to orient the new contour + @param start initial corner of SkRect to add + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_addRect_2 + */ + SkPath& addRect(const SkRect& rect, SkPathDirection dir, unsigned start); + + SkPath& addRect(const SkRect& rect, SkPathDirection dir = SkPathDirection::kCW) { + return this->addRect(rect, dir, 0); + } + + SkPath& addRect(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom, + SkPathDirection dir = SkPathDirection::kCW) { + return this->addRect({left, top, right, bottom}, dir, 0); + } + + /** Adds oval to path, appending kMove_Verb, four kConic_Verb, and kClose_Verb. + Oval is upright ellipse bounded by SkRect oval with radii equal to half oval width + and half oval height. Oval begins at (oval.fRight, oval.centerY()) and continues + clockwise if dir is kCW_Direction, counterclockwise if dir is kCCW_Direction. + + @param oval bounds of ellipse added + @param dir SkPath::Direction to wind ellipse + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_addOval + */ + SkPath& addOval(const SkRect& oval, SkPathDirection dir = SkPathDirection::kCW); + + /** Adds oval to SkPath, appending kMove_Verb, four kConic_Verb, and kClose_Verb. + Oval is upright ellipse bounded by SkRect oval with radii equal to half oval width + and half oval height. Oval begins at start and continues + clockwise if dir is kCW_Direction, counterclockwise if dir is kCCW_Direction. + + @param oval bounds of ellipse added + @param dir SkPath::Direction to wind ellipse + @param start index of initial point of ellipse + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_addOval_2 + */ + SkPath& addOval(const SkRect& oval, SkPathDirection dir, unsigned start); + + /** Adds circle centered at (x, y) of size radius to SkPath, appending kMove_Verb, + four kConic_Verb, and kClose_Verb. Circle begins at: (x + radius, y), continuing + clockwise if dir is kCW_Direction, and counterclockwise if dir is kCCW_Direction. + + Has no effect if radius is zero or negative. + + @param x center of circle + @param y center of circle + @param radius distance from center to edge + @param dir SkPath::Direction to wind circle + @return reference to SkPath + */ + SkPath& addCircle(SkScalar x, SkScalar y, SkScalar radius, + SkPathDirection dir = SkPathDirection::kCW); + + /** Appends arc to SkPath, as the start of new contour. Arc added is part of ellipse + bounded by oval, from startAngle through sweepAngle. Both startAngle and + sweepAngle are measured in degrees, where zero degrees is aligned with the + positive x-axis, and positive sweeps extends arc clockwise. + + If sweepAngle <= -360, or sweepAngle >= 360; and startAngle modulo 90 is nearly + zero, append oval instead of arc. Otherwise, sweepAngle values are treated + modulo 360, and arc may or may not draw depending on numeric rounding. + + @param oval bounds of ellipse containing arc + @param startAngle starting angle of arc in degrees + @param sweepAngle sweep, in degrees. Positive is clockwise; treated modulo 360 + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_addArc + */ + SkPath& addArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle); + + /** Appends SkRRect to SkPath, creating a new closed contour. SkRRect has bounds + equal to rect; each corner is 90 degrees of an ellipse with radii (rx, ry). If + dir is kCW_Direction, SkRRect starts at top-left of the lower-left corner and + winds clockwise. If dir is kCCW_Direction, SkRRect starts at the bottom-left + of the upper-left corner and winds counterclockwise. + + If either rx or ry is too large, rx and ry are scaled uniformly until the + corners fit. If rx or ry is less than or equal to zero, addRoundRect() appends + SkRect rect to SkPath. + + After appending, SkPath may be empty, or may contain: SkRect, oval, or SkRRect. + + @param rect bounds of SkRRect + @param rx x-axis radius of rounded corners on the SkRRect + @param ry y-axis radius of rounded corners on the SkRRect + @param dir SkPath::Direction to wind SkRRect + @return reference to SkPath + */ + SkPath& addRoundRect(const SkRect& rect, SkScalar rx, SkScalar ry, + SkPathDirection dir = SkPathDirection::kCW); + + /** Appends SkRRect to SkPath, creating a new closed contour. SkRRect has bounds + equal to rect; each corner is 90 degrees of an ellipse with radii from the + array. + + @param rect bounds of SkRRect + @param radii array of 8 SkScalar values, a radius pair for each corner + @param dir SkPath::Direction to wind SkRRect + @return reference to SkPath + */ + SkPath& addRoundRect(const SkRect& rect, const SkScalar radii[], + SkPathDirection dir = SkPathDirection::kCW); + + /** Adds rrect to SkPath, creating a new closed contour. If + dir is kCW_Direction, rrect starts at top-left of the lower-left corner and + winds clockwise. If dir is kCCW_Direction, rrect starts at the bottom-left + of the upper-left corner and winds counterclockwise. + + After appending, SkPath may be empty, or may contain: SkRect, oval, or SkRRect. + + @param rrect bounds and radii of rounded rectangle + @param dir SkPath::Direction to wind SkRRect + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_addRRect + */ + SkPath& addRRect(const SkRRect& rrect, SkPathDirection dir = SkPathDirection::kCW); + + /** Adds rrect to SkPath, creating a new closed contour. If dir is kCW_Direction, rrect + winds clockwise; if dir is kCCW_Direction, rrect winds counterclockwise. + start determines the first point of rrect to add. + + @param rrect bounds and radii of rounded rectangle + @param dir SkPath::Direction to wind SkRRect + @param start index of initial point of SkRRect + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_addRRect_2 + */ + SkPath& addRRect(const SkRRect& rrect, SkPathDirection dir, unsigned start); + + /** Adds contour created from line array, adding (count - 1) line segments. + Contour added starts at pts[0], then adds a line for every additional SkPoint + in pts array. If close is true, appends kClose_Verb to SkPath, connecting + pts[count - 1] and pts[0]. + + If count is zero, append kMove_Verb to path. + Has no effect if count is less than one. + + @param pts array of line sharing end and start SkPoint + @param count length of SkPoint array + @param close true to add line connecting contour end and start + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_addPoly + */ + SkPath& addPoly(const SkPoint pts[], int count, bool close); + + /** Adds contour created from list. Contour added starts at list[0], then adds a line + for every additional SkPoint in list. If close is true, appends kClose_Verb to SkPath, + connecting last and first SkPoint in list. + + If list is empty, append kMove_Verb to path. + + @param list array of SkPoint + @param close true to add line connecting contour end and start + @return reference to SkPath + */ + SkPath& addPoly(const std::initializer_list& list, bool close) { + return this->addPoly(list.begin(), SkToInt(list.size()), close); + } + +#ifdef SK_HIDE_PATH_EDIT_METHODS +public: +#endif + + /** \enum SkPath::AddPathMode + AddPathMode chooses how addPath() appends. Adding one SkPath to another can extend + the last contour or start a new contour. + */ + enum AddPathMode { + kAppend_AddPathMode, //!< appended to destination unaltered + kExtend_AddPathMode, //!< add line if prior contour is not closed + }; + + /** Appends src to SkPath, offset by (dx, dy). + + If mode is kAppend_AddPathMode, src verb array, SkPoint array, and conic weights are + added unaltered. If mode is kExtend_AddPathMode, add line before appending + verbs, SkPoint, and conic weights. + + @param src SkPath verbs, SkPoint, and conic weights to add + @param dx offset added to src SkPoint array x-axis coordinates + @param dy offset added to src SkPoint array y-axis coordinates + @param mode kAppend_AddPathMode or kExtend_AddPathMode + @return reference to SkPath + */ + SkPath& addPath(const SkPath& src, SkScalar dx, SkScalar dy, + AddPathMode mode = kAppend_AddPathMode); + + /** Appends src to SkPath. + + If mode is kAppend_AddPathMode, src verb array, SkPoint array, and conic weights are + added unaltered. If mode is kExtend_AddPathMode, add line before appending + verbs, SkPoint, and conic weights. + + @param src SkPath verbs, SkPoint, and conic weights to add + @param mode kAppend_AddPathMode or kExtend_AddPathMode + @return reference to SkPath + */ + SkPath& addPath(const SkPath& src, AddPathMode mode = kAppend_AddPathMode) { + SkMatrix m; + m.reset(); + return this->addPath(src, m, mode); + } + + /** Appends src to SkPath, transformed by matrix. Transformed curves may have different + verbs, SkPoint, and conic weights. + + If mode is kAppend_AddPathMode, src verb array, SkPoint array, and conic weights are + added unaltered. If mode is kExtend_AddPathMode, add line before appending + verbs, SkPoint, and conic weights. + + @param src SkPath verbs, SkPoint, and conic weights to add + @param matrix transform applied to src + @param mode kAppend_AddPathMode or kExtend_AddPathMode + @return reference to SkPath + */ + SkPath& addPath(const SkPath& src, const SkMatrix& matrix, + AddPathMode mode = kAppend_AddPathMode); + + /** Appends src to SkPath, from back to front. + Reversed src always appends a new contour to SkPath. + + @param src SkPath verbs, SkPoint, and conic weights to add + @return reference to SkPath + + example: https://fiddle.skia.org/c/@Path_reverseAddPath + */ + SkPath& reverseAddPath(const SkPath& src); + + /** Offsets SkPoint array by (dx, dy). Offset SkPath replaces dst. + If dst is nullptr, SkPath is replaced by offset data. + + @param dx offset added to SkPoint array x-axis coordinates + @param dy offset added to SkPoint array y-axis coordinates + @param dst overwritten, translated copy of SkPath; may be nullptr + + example: https://fiddle.skia.org/c/@Path_offset + */ + void offset(SkScalar dx, SkScalar dy, SkPath* dst) const; + + /** Offsets SkPoint array by (dx, dy). SkPath is replaced by offset data. + + @param dx offset added to SkPoint array x-axis coordinates + @param dy offset added to SkPoint array y-axis coordinates + */ + void offset(SkScalar dx, SkScalar dy) { + this->offset(dx, dy, this); + } + + /** Transforms verb array, SkPoint array, and weight by matrix. + transform may change verbs and increase their number. + Transformed SkPath replaces dst; if dst is nullptr, original data + is replaced. + + @param matrix SkMatrix to apply to SkPath + @param dst overwritten, transformed copy of SkPath; may be nullptr + @param pc whether to apply perspective clipping + + example: https://fiddle.skia.org/c/@Path_transform + */ + void transform(const SkMatrix& matrix, SkPath* dst, + SkApplyPerspectiveClip pc = SkApplyPerspectiveClip::kYes) const; + + /** Transforms verb array, SkPoint array, and weight by matrix. + transform may change verbs and increase their number. + SkPath is replaced by transformed data. + + @param matrix SkMatrix to apply to SkPath + @param pc whether to apply perspective clipping + */ + void transform(const SkMatrix& matrix, + SkApplyPerspectiveClip pc = SkApplyPerspectiveClip::kYes) { + this->transform(matrix, this, pc); + } + + SkPath makeTransform(const SkMatrix& m, + SkApplyPerspectiveClip pc = SkApplyPerspectiveClip::kYes) const { + SkPath dst; + this->transform(m, &dst, pc); + return dst; + } + + SkPath makeScale(SkScalar sx, SkScalar sy) { + return this->makeTransform(SkMatrix::Scale(sx, sy), SkApplyPerspectiveClip::kNo); + } + + /** Returns last point on SkPath in lastPt. Returns false if SkPoint array is empty, + storing (0, 0) if lastPt is not nullptr. + + @param lastPt storage for final SkPoint in SkPoint array; may be nullptr + @return true if SkPoint array contains one or more SkPoint + + example: https://fiddle.skia.org/c/@Path_getLastPt + */ + bool getLastPt(SkPoint* lastPt) const; + + /** Sets last point to (x, y). If SkPoint array is empty, append kMove_Verb to + verb array and append (x, y) to SkPoint array. + + @param x set x-axis value of last point + @param y set y-axis value of last point + + example: https://fiddle.skia.org/c/@Path_setLastPt + */ + void setLastPt(SkScalar x, SkScalar y); + + /** Sets the last point on the path. If SkPoint array is empty, append kMove_Verb to + verb array and append p to SkPoint array. + + @param p set value of last point + */ + void setLastPt(const SkPoint& p) { + this->setLastPt(p.fX, p.fY); + } + + /** \enum SkPath::SegmentMask + SegmentMask constants correspond to each drawing Verb type in SkPath; for + instance, if SkPath only contains lines, only the kLine_SegmentMask bit is set. + */ + enum SegmentMask { + kLine_SegmentMask = kLine_SkPathSegmentMask, + kQuad_SegmentMask = kQuad_SkPathSegmentMask, + kConic_SegmentMask = kConic_SkPathSegmentMask, + kCubic_SegmentMask = kCubic_SkPathSegmentMask, + }; + + /** Returns a mask, where each set bit corresponds to a SegmentMask constant + if SkPath contains one or more verbs of that type. + Returns zero if SkPath contains no lines, or curves: quads, conics, or cubics. + + getSegmentMasks() returns a cached result; it is very fast. + + @return SegmentMask bits or zero + */ + uint32_t getSegmentMasks() const; + + /** \enum SkPath::Verb + Verb instructs SkPath how to interpret one or more SkPoint and optional conic weight; + manage contour, and terminate SkPath. + */ + enum Verb { + kMove_Verb = static_cast(SkPathVerb::kMove), + kLine_Verb = static_cast(SkPathVerb::kLine), + kQuad_Verb = static_cast(SkPathVerb::kQuad), + kConic_Verb = static_cast(SkPathVerb::kConic), + kCubic_Verb = static_cast(SkPathVerb::kCubic), + kClose_Verb = static_cast(SkPathVerb::kClose), + kDone_Verb = kClose_Verb + 1 + }; + + /** \class SkPath::Iter + Iterates through verb array, and associated SkPoint array and conic weight. + Provides options to treat open contours as closed, and to ignore + degenerate data. + */ + class SK_API Iter { + public: + + /** Initializes SkPath::Iter with an empty SkPath. next() on SkPath::Iter returns + kDone_Verb. + Call setPath to initialize SkPath::Iter at a later time. + + @return SkPath::Iter of empty SkPath + + example: https://fiddle.skia.org/c/@Path_Iter_Iter + */ + Iter(); + + /** Sets SkPath::Iter to return elements of verb array, SkPoint array, and conic weight in + path. If forceClose is true, SkPath::Iter will add kLine_Verb and kClose_Verb after each + open contour. path is not altered. + + @param path SkPath to iterate + @param forceClose true if open contours generate kClose_Verb + @return SkPath::Iter of path + + example: https://fiddle.skia.org/c/@Path_Iter_const_SkPath + */ + Iter(const SkPath& path, bool forceClose); + + /** Sets SkPath::Iter to return elements of verb array, SkPoint array, and conic weight in + path. If forceClose is true, SkPath::Iter will add kLine_Verb and kClose_Verb after each + open contour. path is not altered. + + @param path SkPath to iterate + @param forceClose true if open contours generate kClose_Verb + + example: https://fiddle.skia.org/c/@Path_Iter_setPath + */ + void setPath(const SkPath& path, bool forceClose); + + /** Returns next SkPath::Verb in verb array, and advances SkPath::Iter. + When verb array is exhausted, returns kDone_Verb. + + Zero to four SkPoint are stored in pts, depending on the returned SkPath::Verb. + + @param pts storage for SkPoint data describing returned SkPath::Verb + @return next SkPath::Verb from verb array + + example: https://fiddle.skia.org/c/@Path_RawIter_next + */ + Verb next(SkPoint pts[4]); + + /** Returns conic weight if next() returned kConic_Verb. + + If next() has not been called, or next() did not return kConic_Verb, + result is undefined. + + @return conic weight for conic SkPoint returned by next() + */ + SkScalar conicWeight() const { return *fConicWeights; } + + /** Returns true if last kLine_Verb returned by next() was generated + by kClose_Verb. When true, the end point returned by next() is + also the start point of contour. + + If next() has not been called, or next() did not return kLine_Verb, + result is undefined. + + @return true if last kLine_Verb was generated by kClose_Verb + */ + bool isCloseLine() const { return SkToBool(fCloseLine); } + + /** Returns true if subsequent calls to next() return kClose_Verb before returning + kMove_Verb. if true, contour SkPath::Iter is processing may end with kClose_Verb, or + SkPath::Iter may have been initialized with force close set to true. + + @return true if contour is closed + + example: https://fiddle.skia.org/c/@Path_Iter_isClosedContour + */ + bool isClosedContour() const; + + private: + const SkPoint* fPts; + const uint8_t* fVerbs; + const uint8_t* fVerbStop; + const SkScalar* fConicWeights; + SkPoint fMoveTo; + SkPoint fLastPt; + bool fForceClose; + bool fNeedClose; + bool fCloseLine; + + Verb autoClose(SkPoint pts[2]); + }; + +private: + /** \class SkPath::RangeIter + Iterates through a raw range of path verbs, points, and conics. All values are returned + unaltered. + + NOTE: This class will be moved into SkPathPriv once RangeIter is removed. + */ + class RangeIter { + public: + RangeIter() = default; + RangeIter(const uint8_t* verbs, const SkPoint* points, const SkScalar* weights) + : fVerb(verbs), fPoints(points), fWeights(weights) { + SkDEBUGCODE(fInitialPoints = fPoints;) + } + bool operator!=(const RangeIter& that) const { + return fVerb != that.fVerb; + } + bool operator==(const RangeIter& that) const { + return fVerb == that.fVerb; + } + RangeIter& operator++() { + auto verb = static_cast(*fVerb++); + fPoints += pts_advance_after_verb(verb); + if (verb == SkPathVerb::kConic) { + ++fWeights; + } + return *this; + } + RangeIter operator++(int) { + RangeIter copy = *this; + this->operator++(); + return copy; + } + SkPathVerb peekVerb() const { + return static_cast(*fVerb); + } + std::tuple operator*() const { + SkPathVerb verb = this->peekVerb(); + // We provide the starting point for beziers by peeking backwards from the current + // point, which works fine as long as there is always a kMove before any geometry. + // (SkPath::injectMoveToIfNeeded should have guaranteed this to be the case.) + int backset = pts_backset_for_verb(verb); + SkASSERT(fPoints + backset >= fInitialPoints); + return {verb, fPoints + backset, fWeights}; + } + private: + constexpr static int pts_advance_after_verb(SkPathVerb verb) { + switch (verb) { + case SkPathVerb::kMove: return 1; + case SkPathVerb::kLine: return 1; + case SkPathVerb::kQuad: return 2; + case SkPathVerb::kConic: return 2; + case SkPathVerb::kCubic: return 3; + case SkPathVerb::kClose: return 0; + } + SkUNREACHABLE; + } + constexpr static int pts_backset_for_verb(SkPathVerb verb) { + switch (verb) { + case SkPathVerb::kMove: return 0; + case SkPathVerb::kLine: return -1; + case SkPathVerb::kQuad: return -1; + case SkPathVerb::kConic: return -1; + case SkPathVerb::kCubic: return -1; + case SkPathVerb::kClose: return -1; + } + SkUNREACHABLE; + } + const uint8_t* fVerb = nullptr; + const SkPoint* fPoints = nullptr; + const SkScalar* fWeights = nullptr; + SkDEBUGCODE(const SkPoint* fInitialPoints = nullptr;) + }; +public: + + /** \class SkPath::RawIter + Use Iter instead. This class will soon be removed and RangeIter will be made private. + */ + class SK_API RawIter { + public: + + /** Initializes RawIter with an empty SkPath. next() on RawIter returns kDone_Verb. + Call setPath to initialize SkPath::Iter at a later time. + + @return RawIter of empty SkPath + */ + RawIter() {} + + /** Sets RawIter to return elements of verb array, SkPoint array, and conic weight in path. + + @param path SkPath to iterate + @return RawIter of path + */ + RawIter(const SkPath& path) { + setPath(path); + } + + /** Sets SkPath::Iter to return elements of verb array, SkPoint array, and conic weight in + path. + + @param path SkPath to iterate + */ + void setPath(const SkPath&); + + /** Returns next SkPath::Verb in verb array, and advances RawIter. + When verb array is exhausted, returns kDone_Verb. + Zero to four SkPoint are stored in pts, depending on the returned SkPath::Verb. + + @param pts storage for SkPoint data describing returned SkPath::Verb + @return next SkPath::Verb from verb array + */ + Verb next(SkPoint[4]); + + /** Returns next SkPath::Verb, but does not advance RawIter. + + @return next SkPath::Verb from verb array + */ + Verb peek() const { + return (fIter != fEnd) ? static_cast(std::get<0>(*fIter)) : kDone_Verb; + } + + /** Returns conic weight if next() returned kConic_Verb. + + If next() has not been called, or next() did not return kConic_Verb, + result is undefined. + + @return conic weight for conic SkPoint returned by next() + */ + SkScalar conicWeight() const { + return fConicWeight; + } + + private: + RangeIter fIter; + RangeIter fEnd; + SkScalar fConicWeight = 0; + friend class SkPath; + + }; + + /** Returns true if the point (x, y) is contained by SkPath, taking into + account FillType. + + @param x x-axis value of containment test + @param y y-axis value of containment test + @return true if SkPoint is in SkPath + + example: https://fiddle.skia.org/c/@Path_contains + */ + bool contains(SkScalar x, SkScalar y) const; + + /** Writes text representation of SkPath to stream. If stream is nullptr, writes to + standard output. Set dumpAsHex true to generate exact binary representations + of floating point numbers used in SkPoint array and conic weights. + + @param stream writable SkWStream receiving SkPath text representation; may be nullptr + @param dumpAsHex true if SkScalar values are written as hexadecimal + + example: https://fiddle.skia.org/c/@Path_dump + */ + void dump(SkWStream* stream, bool dumpAsHex) const; + + void dump() const { this->dump(nullptr, false); } + void dumpHex() const { this->dump(nullptr, true); } + + // Like dump(), but outputs for the SkPath::Make() factory + void dumpArrays(SkWStream* stream, bool dumpAsHex) const; + void dumpArrays() const { this->dumpArrays(nullptr, false); } + + /** Writes SkPath to buffer, returning the number of bytes written. + Pass nullptr to obtain the storage size. + + Writes SkPath::FillType, verb array, SkPoint array, conic weight, and + additionally writes computed information like SkPath::Convexity and bounds. + + Use only be used in concert with readFromMemory(); + the format used for SkPath in memory is not guaranteed. + + @param buffer storage for SkPath; may be nullptr + @return size of storage required for SkPath; always a multiple of 4 + + example: https://fiddle.skia.org/c/@Path_writeToMemory + */ + size_t writeToMemory(void* buffer) const; + + /** Writes SkPath to buffer, returning the buffer written to, wrapped in SkData. + + serialize() writes SkPath::FillType, verb array, SkPoint array, conic weight, and + additionally writes computed information like SkPath::Convexity and bounds. + + serialize() should only be used in concert with readFromMemory(). + The format used for SkPath in memory is not guaranteed. + + @return SkPath data wrapped in SkData buffer + + example: https://fiddle.skia.org/c/@Path_serialize + */ + sk_sp serialize() const; + + /** Initializes SkPath from buffer of size length. Returns zero if the buffer is + data is inconsistent, or the length is too small. + + Reads SkPath::FillType, verb array, SkPoint array, conic weight, and + additionally reads computed information like SkPath::Convexity and bounds. + + Used only in concert with writeToMemory(); + the format used for SkPath in memory is not guaranteed. + + @param buffer storage for SkPath + @param length buffer size in bytes; must be multiple of 4 + @return number of bytes read, or zero on failure + + example: https://fiddle.skia.org/c/@Path_readFromMemory + */ + size_t readFromMemory(const void* buffer, size_t length); + + /** (See Skia bug 1762.) + Returns a non-zero, globally unique value. A different value is returned + if verb array, SkPoint array, or conic weight changes. + + Setting SkPath::FillType does not change generation identifier. + + Each time the path is modified, a different generation identifier will be returned. + SkPath::FillType does affect generation identifier on Android framework. + + @return non-zero, globally unique value + + example: https://fiddle.skia.org/c/@Path_getGenerationID + */ + uint32_t getGenerationID() const; + + /** Returns if SkPath data is consistent. Corrupt SkPath data is detected if + internal values are out of range or internal storage does not match + array dimensions. + + @return true if SkPath data is consistent + */ + bool isValid() const; + + using sk_is_trivially_relocatable = std::true_type; + +private: + SkPath(sk_sp, SkPathFillType, bool isVolatile, SkPathConvexity, + SkPathFirstDirection firstDirection); + + sk_sp fPathRef; + int fLastMoveToIndex; + mutable std::atomic fConvexity; // SkPathConvexity + mutable std::atomic fFirstDirection; // SkPathFirstDirection + uint8_t fFillType : 2; + uint8_t fIsVolatile : 1; + + static_assert(::sk_is_trivially_relocatable::value); + + /** Resets all fields other than fPathRef to their initial 'empty' values. + * Assumes the caller has already emptied fPathRef. + * On Android increments fGenerationID without reseting it. + */ + void resetFields(); + + /** Sets all fields other than fPathRef to the values in 'that'. + * Assumes the caller has already set fPathRef. + * Doesn't change fGenerationID or fSourcePath on Android. + */ + void copyFields(const SkPath& that); + + size_t writeToMemoryAsRRect(void* buffer) const; + size_t readAsRRect(const void*, size_t); + size_t readFromMemory_EQ4Or5(const void*, size_t); + + friend class Iter; + friend class SkPathPriv; + friend class SkPathStroker; + + /* Append, in reverse order, the first contour of path, ignoring path's + last point. If no moveTo() call has been made for this contour, the + first point is automatically set to (0,0). + */ + SkPath& reversePathTo(const SkPath&); + + // called before we add points for lineTo, quadTo, cubicTo, checking to see + // if we need to inject a leading moveTo first + // + // SkPath path; path.lineTo(...); <--- need a leading moveTo(0, 0) + // SkPath path; ... path.close(); path.lineTo(...) <-- need a moveTo(previous moveTo) + // + inline void injectMoveToIfNeeded(); + + inline bool hasOnlyMoveTos() const; + + SkPathConvexity computeConvexity() const; + + bool isValidImpl() const; + /** Asserts if SkPath data is inconsistent. + Debugging check intended for internal use only. + */ +#ifdef SK_DEBUG + void validate() const; + void validateRef() const; +#endif + + // called by stroker to see if all points (in the last contour) are equal and worthy of a cap + bool isZeroLengthSincePoint(int startPtIndex) const; + + /** Returns if the path can return a bound at no cost (true) or will have to + perform some computation (false). + */ + bool hasComputedBounds() const; + + // 'rect' needs to be sorted + void setBounds(const SkRect& rect); + + void setPt(int index, SkScalar x, SkScalar y); + + SkPath& dirtyAfterEdit(); + + // Bottlenecks for working with fConvexity and fFirstDirection. + // Notice the setters are const... these are mutable atomic fields. + void setConvexity(SkPathConvexity) const; + + void setFirstDirection(SkPathFirstDirection) const; + SkPathFirstDirection getFirstDirection() const; + + /** Returns the comvexity type, computing if needed. Never returns kUnknown. + @return path's convexity type (convex or concave) + */ + SkPathConvexity getConvexity() const; + + SkPathConvexity getConvexityOrUnknown() const; + + // Compares the cached value with a freshly computed one (computeConvexity()) + bool isConvexityAccurate() const; + + /** Stores a convexity type for this path. This is what will be returned if + * getConvexityOrUnknown() is called. If you pass kUnknown, then if getContexityType() + * is called, the real convexity will be computed. + * + * example: https://fiddle.skia.org/c/@Path_setConvexity + */ + void setConvexity(SkPathConvexity convexity); + + /** Shrinks SkPath verb array and SkPoint array storage to discard unused capacity. + * May reduce the heap overhead for SkPath known to be fully constructed. + * + * NOTE: This may relocate the underlying buffers, and thus any Iterators referencing + * this path should be discarded after calling shrinkToFit(). + */ + void shrinkToFit(); + + friend class SkAutoPathBoundsUpdate; + friend class SkAutoDisableOvalCheck; + friend class SkAutoDisableDirectionCheck; + friend class SkPathBuilder; + friend class SkPathEdgeIter; + friend class SkPathWriter; + friend class SkOpBuilder; + friend class SkBench_AddPathTest; // perf test reversePathTo + friend class PathTest_Private; // unit test reversePathTo + friend class ForceIsRRect_Private; // unit test isRRect + friend class FuzzPath; // for legacy access to validateRef +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPathBuilder.h b/gfx/skia/skia/include/core/SkPathBuilder.h new file mode 100644 index 0000000000..247c08624c --- /dev/null +++ b/gfx/skia/skia/include/core/SkPathBuilder.h @@ -0,0 +1,271 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathBuilder_DEFINED +#define SkPathBuilder_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/SkPathRef.h" +#include "include/private/base/SkTo.h" + +#include + +class SkRRect; + +class SK_API SkPathBuilder { +public: + SkPathBuilder(); + SkPathBuilder(SkPathFillType); + SkPathBuilder(const SkPath&); + SkPathBuilder(const SkPathBuilder&) = default; + ~SkPathBuilder(); + + SkPathBuilder& operator=(const SkPath&); + SkPathBuilder& operator=(const SkPathBuilder&) = default; + + SkPathFillType fillType() const { return fFillType; } + SkRect computeBounds() const; + + SkPath snapshot() const; // the builder is unchanged after returning this path + SkPath detach(); // the builder is reset to empty after returning this path + + SkPathBuilder& setFillType(SkPathFillType ft) { fFillType = ft; return *this; } + SkPathBuilder& setIsVolatile(bool isVolatile) { fIsVolatile = isVolatile; return *this; } + + SkPathBuilder& reset(); + + SkPathBuilder& moveTo(SkPoint pt); + SkPathBuilder& moveTo(SkScalar x, SkScalar y) { return this->moveTo(SkPoint::Make(x, y)); } + + SkPathBuilder& lineTo(SkPoint pt); + SkPathBuilder& lineTo(SkScalar x, SkScalar y) { return this->lineTo(SkPoint::Make(x, y)); } + + SkPathBuilder& quadTo(SkPoint pt1, SkPoint pt2); + SkPathBuilder& quadTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2) { + return this->quadTo(SkPoint::Make(x1, y1), SkPoint::Make(x2, y2)); + } + SkPathBuilder& quadTo(const SkPoint pts[2]) { return this->quadTo(pts[0], pts[1]); } + + SkPathBuilder& conicTo(SkPoint pt1, SkPoint pt2, SkScalar w); + SkPathBuilder& conicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, SkScalar w) { + return this->conicTo(SkPoint::Make(x1, y1), SkPoint::Make(x2, y2), w); + } + SkPathBuilder& conicTo(const SkPoint pts[2], SkScalar w) { + return this->conicTo(pts[0], pts[1], w); + } + + SkPathBuilder& cubicTo(SkPoint pt1, SkPoint pt2, SkPoint pt3); + SkPathBuilder& cubicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, SkScalar x3, SkScalar y3) { + return this->cubicTo(SkPoint::Make(x1, y1), SkPoint::Make(x2, y2), SkPoint::Make(x3, y3)); + } + SkPathBuilder& cubicTo(const SkPoint pts[3]) { + return this->cubicTo(pts[0], pts[1], pts[2]); + } + + SkPathBuilder& close(); + + // Append a series of lineTo(...) + SkPathBuilder& polylineTo(const SkPoint pts[], int count); + SkPathBuilder& polylineTo(const std::initializer_list& list) { + return this->polylineTo(list.begin(), SkToInt(list.size())); + } + + // Relative versions of segments, relative to the previous position. + + SkPathBuilder& rLineTo(SkPoint pt); + SkPathBuilder& rLineTo(SkScalar x, SkScalar y) { return this->rLineTo({x, y}); } + SkPathBuilder& rQuadTo(SkPoint pt1, SkPoint pt2); + SkPathBuilder& rQuadTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2) { + return this->rQuadTo({x1, y1}, {x2, y2}); + } + SkPathBuilder& rConicTo(SkPoint p1, SkPoint p2, SkScalar w); + SkPathBuilder& rConicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, SkScalar w) { + return this->rConicTo({x1, y1}, {x2, y2}, w); + } + SkPathBuilder& rCubicTo(SkPoint pt1, SkPoint pt2, SkPoint pt3); + SkPathBuilder& rCubicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, SkScalar x3, SkScalar y3) { + return this->rCubicTo({x1, y1}, {x2, y2}, {x3, y3}); + } + + // Arcs + + /** Appends arc to the builder. Arc added is part of ellipse + bounded by oval, from startAngle through sweepAngle. Both startAngle and + sweepAngle are measured in degrees, where zero degrees is aligned with the + positive x-axis, and positive sweeps extends arc clockwise. + + arcTo() adds line connecting the builder's last point to initial arc point if forceMoveTo + is false and the builder is not empty. Otherwise, added contour begins with first point + of arc. Angles greater than -360 and less than 360 are treated modulo 360. + + @param oval bounds of ellipse containing arc + @param startAngleDeg starting angle of arc in degrees + @param sweepAngleDeg sweep, in degrees. Positive is clockwise; treated modulo 360 + @param forceMoveTo true to start a new contour with arc + @return reference to the builder + */ + SkPathBuilder& arcTo(const SkRect& oval, SkScalar startAngleDeg, SkScalar sweepAngleDeg, + bool forceMoveTo); + + /** Appends arc to SkPath, after appending line if needed. Arc is implemented by conic + weighted to describe part of circle. Arc is contained by tangent from + last SkPath point to p1, and tangent from p1 to p2. Arc + is part of circle sized to radius, positioned so it touches both tangent lines. + + If last SkPath SkPoint does not start arc, arcTo() appends connecting line to SkPath. + The length of vector from p1 to p2 does not affect arc. + + Arc sweep is always less than 180 degrees. If radius is zero, or if + tangents are nearly parallel, arcTo() appends line from last SkPath SkPoint to p1. + + arcTo() appends at most one line and one conic. + arcTo() implements the functionality of PostScript arct and HTML Canvas arcTo. + + @param p1 SkPoint common to pair of tangents + @param p2 end of second tangent + @param radius distance from arc to circle center + @return reference to SkPath + */ + SkPathBuilder& arcTo(SkPoint p1, SkPoint p2, SkScalar radius); + + enum ArcSize { + kSmall_ArcSize, //!< smaller of arc pair + kLarge_ArcSize, //!< larger of arc pair + }; + + /** Appends arc to SkPath. Arc is implemented by one or more conic weighted to describe + part of oval with radii (r.fX, r.fY) rotated by xAxisRotate degrees. Arc curves + from last SkPath SkPoint to (xy.fX, xy.fY), choosing one of four possible routes: + clockwise or counterclockwise, + and smaller or larger. + + Arc sweep is always less than 360 degrees. arcTo() appends line to xy if either + radii are zero, or if last SkPath SkPoint equals (xy.fX, xy.fY). arcTo() scales radii r to + fit last SkPath SkPoint and xy if both are greater than zero but too small to describe + an arc. + + arcTo() appends up to four conic curves. + arcTo() implements the functionality of SVG arc, although SVG sweep-flag value is + opposite the integer value of sweep; SVG sweep-flag uses 1 for clockwise, while + kCW_Direction cast to int is zero. + + @param r radii on axes before x-axis rotation + @param xAxisRotate x-axis rotation in degrees; positive values are clockwise + @param largeArc chooses smaller or larger arc + @param sweep chooses clockwise or counterclockwise arc + @param xy end of arc + @return reference to SkPath + */ + SkPathBuilder& arcTo(SkPoint r, SkScalar xAxisRotate, ArcSize largeArc, SkPathDirection sweep, + SkPoint xy); + + /** Appends arc to the builder, as the start of new contour. Arc added is part of ellipse + bounded by oval, from startAngle through sweepAngle. Both startAngle and + sweepAngle are measured in degrees, where zero degrees is aligned with the + positive x-axis, and positive sweeps extends arc clockwise. + + If sweepAngle <= -360, or sweepAngle >= 360; and startAngle modulo 90 is nearly + zero, append oval instead of arc. Otherwise, sweepAngle values are treated + modulo 360, and arc may or may not draw depending on numeric rounding. + + @param oval bounds of ellipse containing arc + @param startAngleDeg starting angle of arc in degrees + @param sweepAngleDeg sweep, in degrees. Positive is clockwise; treated modulo 360 + @return reference to this builder + */ + SkPathBuilder& addArc(const SkRect& oval, SkScalar startAngleDeg, SkScalar sweepAngleDeg); + + // Add a new contour + + SkPathBuilder& addRect(const SkRect&, SkPathDirection, unsigned startIndex); + SkPathBuilder& addOval(const SkRect&, SkPathDirection, unsigned startIndex); + SkPathBuilder& addRRect(const SkRRect&, SkPathDirection, unsigned startIndex); + + SkPathBuilder& addRect(const SkRect& rect, SkPathDirection dir = SkPathDirection::kCW) { + return this->addRect(rect, dir, 0); + } + SkPathBuilder& addOval(const SkRect& rect, SkPathDirection dir = SkPathDirection::kCW) { + // legacy start index: 1 + return this->addOval(rect, dir, 1); + } + SkPathBuilder& addRRect(const SkRRect& rrect, SkPathDirection dir = SkPathDirection::kCW) { + // legacy start indices: 6 (CW) and 7 (CCW) + return this->addRRect(rrect, dir, dir == SkPathDirection::kCW ? 6 : 7); + } + + SkPathBuilder& addCircle(SkScalar center_x, SkScalar center_y, SkScalar radius, + SkPathDirection dir = SkPathDirection::kCW); + + SkPathBuilder& addPolygon(const SkPoint pts[], int count, bool isClosed); + SkPathBuilder& addPolygon(const std::initializer_list& list, bool isClosed) { + return this->addPolygon(list.begin(), SkToInt(list.size()), isClosed); + } + + SkPathBuilder& addPath(const SkPath&); + + // Performance hint, to reserve extra storage for subsequent calls to lineTo, quadTo, etc. + + void incReserve(int extraPtCount, int extraVerbCount); + void incReserve(int extraPtCount) { + this->incReserve(extraPtCount, extraPtCount); + } + + SkPathBuilder& offset(SkScalar dx, SkScalar dy); + + SkPathBuilder& toggleInverseFillType() { + fFillType = (SkPathFillType)((unsigned)fFillType ^ 2); + return *this; + } + +private: + SkPathRef::PointsArray fPts; + SkPathRef::VerbsArray fVerbs; + SkPathRef::ConicWeightsArray fConicWeights; + + SkPathFillType fFillType; + bool fIsVolatile; + + unsigned fSegmentMask; + SkPoint fLastMovePoint; + int fLastMoveIndex; // only needed until SkPath is immutable + bool fNeedsMoveVerb; + + enum IsA { + kIsA_JustMoves, // we only have 0 or more moves + kIsA_MoreThanMoves, // we have verbs other than just move + kIsA_Oval, // we are 0 or more moves followed by an oval + kIsA_RRect, // we are 0 or more moves followed by a rrect + }; + IsA fIsA = kIsA_JustMoves; + int fIsAStart = -1; // tracks direction iff fIsA is not unknown + bool fIsACCW = false; // tracks direction iff fIsA is not unknown + + int countVerbs() const { return fVerbs.size(); } + + // called right before we add a (non-move) verb + void ensureMove() { + fIsA = kIsA_MoreThanMoves; + if (fNeedsMoveVerb) { + this->moveTo(fLastMovePoint); + } + } + + SkPath make(sk_sp) const; + + SkPathBuilder& privateReverseAddPath(const SkPath&); + + friend class SkPathPriv; +}; + +#endif + diff --git a/gfx/skia/skia/include/core/SkPathEffect.h b/gfx/skia/skia/include/core/SkPathEffect.h new file mode 100644 index 0000000000..abb370c52a --- /dev/null +++ b/gfx/skia/skia/include/core/SkPathEffect.h @@ -0,0 +1,106 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathEffect_DEFINED +#define SkPathEffect_DEFINED + +#include "include/core/SkFlattenable.h" +#include "include/core/SkScalar.h" +// not needed, but some of our clients need it (they don't IWYU) +#include "include/core/SkPath.h" + +class SkPath; +struct SkRect; +class SkStrokeRec; + +/** \class SkPathEffect + + SkPathEffect is the base class for objects in the SkPaint that affect + the geometry of a drawing primitive before it is transformed by the + canvas' matrix and drawn. + + Dashing is implemented as a subclass of SkPathEffect. +*/ +class SK_API SkPathEffect : public SkFlattenable { +public: + /** + * Returns a patheffect that apples each effect (first and second) to the original path, + * and returns a path with the sum of these. + * + * result = first(path) + second(path) + * + */ + static sk_sp MakeSum(sk_sp first, sk_sp second); + + /** + * Returns a patheffect that applies the inner effect to the path, and then applies the + * outer effect to the result of the inner's. + * + * result = outer(inner(path)) + */ + static sk_sp MakeCompose(sk_sp outer, sk_sp inner); + + static SkFlattenable::Type GetFlattenableType() { + return kSkPathEffect_Type; + } + + // move to base? + + enum DashType { + kNone_DashType, //!< ignores the info parameter + kDash_DashType, //!< fills in all of the info parameter + }; + + struct DashInfo { + DashInfo() : fIntervals(nullptr), fCount(0), fPhase(0) {} + DashInfo(SkScalar* intervals, int32_t count, SkScalar phase) + : fIntervals(intervals), fCount(count), fPhase(phase) {} + + SkScalar* fIntervals; //!< Length of on/off intervals for dashed lines + // Even values represent ons, and odds offs + int32_t fCount; //!< Number of intervals in the dash. Should be even number + SkScalar fPhase; //!< Offset into the dashed interval pattern + // mod the sum of all intervals + }; + + DashType asADash(DashInfo* info) const; + + /** + * Given a src path (input) and a stroke-rec (input and output), apply + * this effect to the src path, returning the new path in dst, and return + * true. If this effect cannot be applied, return false and ignore dst + * and stroke-rec. + * + * The stroke-rec specifies the initial request for stroking (if any). + * The effect can treat this as input only, or it can choose to change + * the rec as well. For example, the effect can decide to change the + * stroke's width or join, or the effect can change the rec from stroke + * to fill (or fill to stroke) in addition to returning a new (dst) path. + * + * If this method returns true, the caller will apply (as needed) the + * resulting stroke-rec to dst and then draw. + */ + bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect* cullR) const; + + /** Version of filterPath that can be called when the CTM is known. */ + bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect* cullR, + const SkMatrix& ctm) const; + + /** True if this path effect requires a valid CTM */ + bool needsCTM() const; + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr); + +private: + SkPathEffect() = default; + friend class SkPathEffectBase; + + using INHERITED = SkFlattenable; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPathMeasure.h b/gfx/skia/skia/include/core/SkPathMeasure.h new file mode 100644 index 0000000000..167b18278d --- /dev/null +++ b/gfx/skia/skia/include/core/SkPathMeasure.h @@ -0,0 +1,88 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathMeasure_DEFINED +#define SkPathMeasure_DEFINED + +#include "include/core/SkContourMeasure.h" +#include "include/core/SkPath.h" +#include "include/private/base/SkTDArray.h" + +class SK_API SkPathMeasure { +public: + SkPathMeasure(); + /** Initialize the pathmeasure with the specified path. The parts of the path that are needed + * are copied, so the client is free to modify/delete the path after this call. + * + * resScale controls the precision of the measure. values > 1 increase the + * precision (and possibly slow down the computation). + */ + SkPathMeasure(const SkPath& path, bool forceClosed, SkScalar resScale = 1); + ~SkPathMeasure(); + + /** Reset the pathmeasure with the specified path. The parts of the path that are needed + * are copied, so the client is free to modify/delete the path after this call.. + */ + void setPath(const SkPath*, bool forceClosed); + + /** Return the total length of the current contour, or 0 if no path + is associated (e.g. resetPath(null)) + */ + SkScalar getLength(); + + /** Pins distance to 0 <= distance <= getLength(), and then computes + the corresponding position and tangent. + Returns false if there is no path, or a zero-length path was specified, in which case + position and tangent are unchanged. + */ + bool SK_WARN_UNUSED_RESULT getPosTan(SkScalar distance, SkPoint* position, + SkVector* tangent); + + enum MatrixFlags { + kGetPosition_MatrixFlag = 0x01, + kGetTangent_MatrixFlag = 0x02, + kGetPosAndTan_MatrixFlag = kGetPosition_MatrixFlag | kGetTangent_MatrixFlag + }; + + /** Pins distance to 0 <= distance <= getLength(), and then computes + the corresponding matrix (by calling getPosTan). + Returns false if there is no path, or a zero-length path was specified, in which case + matrix is unchanged. + */ + bool SK_WARN_UNUSED_RESULT getMatrix(SkScalar distance, SkMatrix* matrix, + MatrixFlags flags = kGetPosAndTan_MatrixFlag); + + /** Given a start and stop distance, return in dst the intervening segment(s). + If the segment is zero-length, return false, else return true. + startD and stopD are pinned to legal values (0..getLength()). If startD > stopD + then return false (and leave dst untouched). + Begin the segment with a moveTo if startWithMoveTo is true + */ + bool getSegment(SkScalar startD, SkScalar stopD, SkPath* dst, bool startWithMoveTo); + + /** Return true if the current contour is closed() + */ + bool isClosed(); + + /** Move to the next contour in the path. Return true if one exists, or false if + we're done with the path. + */ + bool nextContour(); + +#ifdef SK_DEBUG + void dump(); +#endif + +private: + SkContourMeasureIter fIter; + sk_sp fContour; + + SkPathMeasure(const SkPathMeasure&) = delete; + SkPathMeasure& operator=(const SkPathMeasure&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPathTypes.h b/gfx/skia/skia/include/core/SkPathTypes.h new file mode 100644 index 0000000000..963a6bda00 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPathTypes.h @@ -0,0 +1,57 @@ +/* + * Copyright 2019 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathTypes_DEFINED +#define SkPathTypes_DEFINED + +enum class SkPathFillType { + /** Specifies that "inside" is computed by a non-zero sum of signed edge crossings */ + kWinding, + /** Specifies that "inside" is computed by an odd number of edge crossings */ + kEvenOdd, + /** Same as Winding, but draws outside of the path, rather than inside */ + kInverseWinding, + /** Same as EvenOdd, but draws outside of the path, rather than inside */ + kInverseEvenOdd +}; + +static inline bool SkPathFillType_IsEvenOdd(SkPathFillType ft) { + return (static_cast(ft) & 1) != 0; +} + +static inline bool SkPathFillType_IsInverse(SkPathFillType ft) { + return (static_cast(ft) & 2) != 0; +} + +static inline SkPathFillType SkPathFillType_ConvertToNonInverse(SkPathFillType ft) { + return static_cast(static_cast(ft) & 1); +} + +enum class SkPathDirection { + /** clockwise direction for adding closed contours */ + kCW, + /** counter-clockwise direction for adding closed contours */ + kCCW, +}; + +enum SkPathSegmentMask { + kLine_SkPathSegmentMask = 1 << 0, + kQuad_SkPathSegmentMask = 1 << 1, + kConic_SkPathSegmentMask = 1 << 2, + kCubic_SkPathSegmentMask = 1 << 3, +}; + +enum class SkPathVerb { + kMove, //!< SkPath::RawIter returns 1 point + kLine, //!< SkPath::RawIter returns 2 points + kQuad, //!< SkPath::RawIter returns 3 points + kConic, //!< SkPath::RawIter returns 3 points + 1 weight + kCubic, //!< SkPath::RawIter returns 4 points + kClose //!< SkPath::RawIter returns 0 points +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPathUtils.h b/gfx/skia/skia/include/core/SkPathUtils.h new file mode 100644 index 0000000000..6285da7996 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPathUtils.h @@ -0,0 +1,42 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathUtils_DEFINED +#define SkPathUtils_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +class SkMatrix; +class SkPaint; +class SkPath; +struct SkRect; + +namespace skpathutils { + +/** Returns the filled equivalent of the stroked path. + + @param src SkPath read to create a filled version + @param paint SkPaint, from which attributes such as stroke cap, width, miter, and join, + as well as pathEffect will be used. + @param dst resulting SkPath; may be the same as src, but may not be nullptr + @param cullRect optional limit passed to SkPathEffect + @param resScale if > 1, increase precision, else if (0 < resScale < 1) reduce precision + to favor speed and size + @return true if the dst path was updated, false if it was not (e.g. if the path + represents hairline and cannot be filled). +*/ +SK_API bool FillPathWithPaint(const SkPath &src, const SkPaint &paint, SkPath *dst, + const SkRect *cullRect, SkScalar resScale = 1); + +SK_API bool FillPathWithPaint(const SkPath &src, const SkPaint &paint, SkPath *dst, + const SkRect *cullRect, const SkMatrix &ctm); + +SK_API bool FillPathWithPaint(const SkPath &src, const SkPaint &paint, SkPath *dst); + +} + +#endif diff --git a/gfx/skia/skia/include/core/SkPicture.h b/gfx/skia/skia/include/core/SkPicture.h new file mode 100644 index 0000000000..bb384dfab1 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPicture.h @@ -0,0 +1,278 @@ +/* + * Copyright 2007 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPicture_DEFINED +#define SkPicture_DEFINED + +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkShader.h" +#include "include/core/SkTileMode.h" +#include "include/core/SkTypes.h" + +class SkCanvas; +class SkData; +struct SkDeserialProcs; +class SkImage; +class SkMatrix; +struct SkSerialProcs; +class SkStream; +class SkWStream; + +/** \class SkPicture + SkPicture records drawing commands made to SkCanvas. The command stream may be + played in whole or in part at a later time. + + SkPicture is an abstract class. SkPicture may be generated by SkPictureRecorder + or SkDrawable, or from SkPicture previously saved to SkData or SkStream. + + SkPicture may contain any SkCanvas drawing command, as well as one or more + SkCanvas matrix or SkCanvas clip. SkPicture has a cull SkRect, which is used as + a bounding box hint. To limit SkPicture bounds, use SkCanvas clip when + recording or drawing SkPicture. +*/ +class SK_API SkPicture : public SkRefCnt { +public: + ~SkPicture() override; + + /** Recreates SkPicture that was serialized into a stream. Returns constructed SkPicture + if successful; otherwise, returns nullptr. Fails if data does not permit + constructing valid SkPicture. + + procs->fPictureProc permits supplying a custom function to decode SkPicture. + If procs->fPictureProc is nullptr, default decoding is used. procs->fPictureCtx + may be used to provide user context to procs->fPictureProc; procs->fPictureProc + is called with a pointer to data, data byte length, and user context. + + @param stream container for serial data + @param procs custom serial data decoders; may be nullptr + @return SkPicture constructed from stream data + */ + static sk_sp MakeFromStream(SkStream* stream, + const SkDeserialProcs* procs = nullptr); + + /** Recreates SkPicture that was serialized into data. Returns constructed SkPicture + if successful; otherwise, returns nullptr. Fails if data does not permit + constructing valid SkPicture. + + procs->fPictureProc permits supplying a custom function to decode SkPicture. + If procs->fPictureProc is nullptr, default decoding is used. procs->fPictureCtx + may be used to provide user context to procs->fPictureProc; procs->fPictureProc + is called with a pointer to data, data byte length, and user context. + + @param data container for serial data + @param procs custom serial data decoders; may be nullptr + @return SkPicture constructed from data + */ + static sk_sp MakeFromData(const SkData* data, + const SkDeserialProcs* procs = nullptr); + + /** + + @param data pointer to serial data + @param size size of data + @param procs custom serial data decoders; may be nullptr + @return SkPicture constructed from data + */ + static sk_sp MakeFromData(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr); + + /** \class SkPicture::AbortCallback + AbortCallback is an abstract class. An implementation of AbortCallback may + passed as a parameter to SkPicture::playback, to stop it before all drawing + commands have been processed. + + If AbortCallback::abort returns true, SkPicture::playback is interrupted. + */ + class SK_API AbortCallback { + public: + /** Has no effect. + */ + virtual ~AbortCallback() = default; + + /** Stops SkPicture playback when some condition is met. A subclass of + AbortCallback provides an override for abort() that can stop SkPicture::playback. + + The part of SkPicture drawn when aborted is undefined. SkPicture instantiations are + free to stop drawing at different points during playback. + + If the abort happens inside one or more calls to SkCanvas::save(), stack + of SkCanvas matrix and SkCanvas clip values is restored to its state before + SkPicture::playback was called. + + @return true to stop playback + + example: https://fiddle.skia.org/c/@Picture_AbortCallback_abort + */ + virtual bool abort() = 0; + + protected: + AbortCallback() = default; + AbortCallback(const AbortCallback&) = delete; + AbortCallback& operator=(const AbortCallback&) = delete; + }; + + /** Replays the drawing commands on the specified canvas. In the case that the + commands are recorded, each command in the SkPicture is sent separately to canvas. + + To add a single command to draw SkPicture to recording canvas, call + SkCanvas::drawPicture instead. + + @param canvas receiver of drawing commands + @param callback allows interruption of playback + + example: https://fiddle.skia.org/c/@Picture_playback + */ + virtual void playback(SkCanvas* canvas, AbortCallback* callback = nullptr) const = 0; + + /** Returns cull SkRect for this picture, passed in when SkPicture was created. + Returned SkRect does not specify clipping SkRect for SkPicture; cull is hint + of SkPicture bounds. + + SkPicture is free to discard recorded drawing commands that fall outside + cull. + + @return bounds passed when SkPicture was created + + example: https://fiddle.skia.org/c/@Picture_cullRect + */ + virtual SkRect cullRect() const = 0; + + /** Returns a non-zero value unique among SkPicture in Skia process. + + @return identifier for SkPicture + */ + uint32_t uniqueID() const { return fUniqueID; } + + /** Returns storage containing SkData describing SkPicture, using optional custom + encoders. + + procs->fPictureProc permits supplying a custom function to encode SkPicture. + If procs->fPictureProc is nullptr, default encoding is used. procs->fPictureCtx + may be used to provide user context to procs->fPictureProc; procs->fPictureProc + is called with a pointer to SkPicture and user context. + + @param procs custom serial data encoders; may be nullptr + @return storage containing serialized SkPicture + + example: https://fiddle.skia.org/c/@Picture_serialize + */ + sk_sp serialize(const SkSerialProcs* procs = nullptr) const; + + /** Writes picture to stream, using optional custom encoders. + + procs->fPictureProc permits supplying a custom function to encode SkPicture. + If procs->fPictureProc is nullptr, default encoding is used. procs->fPictureCtx + may be used to provide user context to procs->fPictureProc; procs->fPictureProc + is called with a pointer to SkPicture and user context. + + @param stream writable serial data stream + @param procs custom serial data encoders; may be nullptr + + example: https://fiddle.skia.org/c/@Picture_serialize_2 + */ + void serialize(SkWStream* stream, const SkSerialProcs* procs = nullptr) const; + + /** Returns a placeholder SkPicture. Result does not draw, and contains only + cull SkRect, a hint of its bounds. Result is immutable; it cannot be changed + later. Result identifier is unique. + + Returned placeholder can be intercepted during playback to insert other + commands into SkCanvas draw stream. + + @param cull placeholder dimensions + @return placeholder with unique identifier + + example: https://fiddle.skia.org/c/@Picture_MakePlaceholder + */ + static sk_sp MakePlaceholder(SkRect cull); + + /** Returns the approximate number of operations in SkPicture. Returned value + may be greater or less than the number of SkCanvas calls + recorded: some calls may be recorded as more than one operation, other + calls may be optimized away. + + @param nested if true, include the op-counts of nested pictures as well, else + just return count the ops in the top-level picture. + @return approximate operation count + + example: https://fiddle.skia.org/c/@Picture_approximateOpCount + */ + virtual int approximateOpCount(bool nested = false) const = 0; + + /** Returns the approximate byte size of SkPicture. Does not include large objects + referenced by SkPicture. + + @return approximate size + + example: https://fiddle.skia.org/c/@Picture_approximateBytesUsed + */ + virtual size_t approximateBytesUsed() const = 0; + + /** Return a new shader that will draw with this picture. + * + * @param tmx The tiling mode to use when sampling in the x-direction. + * @param tmy The tiling mode to use when sampling in the y-direction. + * @param mode How to filter the tiles + * @param localMatrix Optional matrix used when sampling + * @param tile The tile rectangle in picture coordinates: this represents the subset + * (or superset) of the picture used when building a tile. It is not + * affected by localMatrix and does not imply scaling (only translation + * and cropping). If null, the tile rect is considered equal to the picture + * bounds. + * @return Returns a new shader object. Note: this function never returns null. + */ + sk_sp makeShader(SkTileMode tmx, SkTileMode tmy, SkFilterMode mode, + const SkMatrix* localMatrix, const SkRect* tileRect) const; + + sk_sp makeShader(SkTileMode tmx, SkTileMode tmy, SkFilterMode mode) const { + return this->makeShader(tmx, tmy, mode, nullptr, nullptr); + } + +private: + // Allowed subclasses. + SkPicture(); + friend class SkBigPicture; + friend class SkEmptyPicture; + friend class SkPicturePriv; + + void serialize(SkWStream*, const SkSerialProcs*, class SkRefCntSet* typefaces, + bool textBlobsOnly=false) const; + static sk_sp MakeFromStreamPriv(SkStream*, const SkDeserialProcs*, + class SkTypefacePlayback*, + int recursionLimit); + friend class SkPictureData; + + /** Return true if the SkStream/Buffer represents a serialized picture, and + fills out SkPictInfo. After this function returns, the data source is not + rewound so it will have to be manually reset before passing to + MakeFromStream or MakeFromBuffer. Note, MakeFromStream and + MakeFromBuffer perform this check internally so these entry points are + intended for stand alone tools. + If false is returned, SkPictInfo is unmodified. + */ + static bool StreamIsSKP(SkStream*, struct SkPictInfo*); + static bool BufferIsSKP(class SkReadBuffer*, struct SkPictInfo*); + friend bool SkPicture_StreamIsSKP(SkStream*, struct SkPictInfo*); + + // Returns NULL if this is not an SkBigPicture. + virtual const class SkBigPicture* asSkBigPicture() const { return nullptr; } + + static bool IsValidPictInfo(const struct SkPictInfo& info); + static sk_sp Forwardport(const struct SkPictInfo&, + const class SkPictureData*, + class SkReadBuffer* buffer); + + struct SkPictInfo createHeader() const; + class SkPictureData* backport() const; + + uint32_t fUniqueID; + mutable std::atomic fAddedToCache{false}; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPictureRecorder.h b/gfx/skia/skia/include/core/SkPictureRecorder.h new file mode 100644 index 0000000000..d91d105000 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPictureRecorder.h @@ -0,0 +1,115 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPictureRecorder_DEFINED +#define SkPictureRecorder_DEFINED + +#include "include/core/SkBBHFactory.h" +#include "include/core/SkPicture.h" +#include "include/core/SkRefCnt.h" + +#include + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK +namespace android { + class Picture; +}; +#endif + +class SkCanvas; +class SkDrawable; +class SkPictureRecord; +class SkRecord; +class SkRecorder; + +class SK_API SkPictureRecorder { +public: + SkPictureRecorder(); + ~SkPictureRecorder(); + + enum FinishFlags { + }; + + /** Returns the canvas that records the drawing commands. + @param bounds the cull rect used when recording this picture. Any drawing the falls outside + of this rect is undefined, and may be drawn or it may not. + @param bbh optional acceleration structure + @param recordFlags optional flags that control recording. + @return the canvas. + */ + SkCanvas* beginRecording(const SkRect& bounds, sk_sp bbh); + + SkCanvas* beginRecording(const SkRect& bounds, SkBBHFactory* bbhFactory = nullptr); + + SkCanvas* beginRecording(SkScalar width, SkScalar height, + SkBBHFactory* bbhFactory = nullptr) { + return this->beginRecording(SkRect::MakeWH(width, height), bbhFactory); + } + + /** Returns the recording canvas if one is active, or NULL if recording is + not active. This does not alter the refcnt on the canvas (if present). + */ + SkCanvas* getRecordingCanvas(); + + /** + * Signal that the caller is done recording. This invalidates the canvas returned by + * beginRecording/getRecordingCanvas. Ownership of the object is passed to the caller, who + * must call unref() when they are done using it. + * + * The returned picture is immutable. If during recording drawables were added to the canvas, + * these will have been "drawn" into a recording canvas, so that this resulting picture will + * reflect their current state, but will not contain a live reference to the drawables + * themselves. + */ + sk_sp finishRecordingAsPicture(); + + /** + * Signal that the caller is done recording, and update the cull rect to use for bounding + * box hierarchy (BBH) generation. The behavior is the same as calling + * finishRecordingAsPicture(), except that this method updates the cull rect initially passed + * into beginRecording. + * @param cullRect the new culling rectangle to use as the overall bound for BBH generation + * and subsequent culling operations. + * @return the picture containing the recorded content. + */ + sk_sp finishRecordingAsPictureWithCull(const SkRect& cullRect); + + /** + * Signal that the caller is done recording. This invalidates the canvas returned by + * beginRecording/getRecordingCanvas. Ownership of the object is passed to the caller, who + * must call unref() when they are done using it. + * + * Unlike finishRecordingAsPicture(), which returns an immutable picture, the returned drawable + * may contain live references to other drawables (if they were added to the recording canvas) + * and therefore this drawable will reflect the current state of those nested drawables anytime + * it is drawn or a new picture is snapped from it (by calling drawable->newPictureSnapshot()). + */ + sk_sp finishRecordingAsDrawable(); + +private: + void reset(); + + /** Replay the current (partially recorded) operation stream into + canvas. This call doesn't close the current recording. + */ +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + friend class android::Picture; +#endif + friend class SkPictureRecorderReplayTester; // for unit testing + void partialReplay(SkCanvas* canvas) const; + + bool fActivelyRecording; + SkRect fCullRect; + sk_sp fBBH; + std::unique_ptr fRecorder; + sk_sp fRecord; + + SkPictureRecorder(SkPictureRecorder&&) = delete; + SkPictureRecorder& operator=(SkPictureRecorder&&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPixelRef.h b/gfx/skia/skia/include/core/SkPixelRef.h new file mode 100644 index 0000000000..5d99821d72 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPixelRef.h @@ -0,0 +1,123 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPixelRef_DEFINED +#define SkPixelRef_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/private/SkIDChangeListener.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTDArray.h" + +#include + +struct SkIRect; + +class GrTexture; +class SkDiscardableMemory; + +/** \class SkPixelRef + + This class is the smart container for pixel memory, and is used with SkBitmap. + This class can be shared/accessed between multiple threads. +*/ +class SK_API SkPixelRef : public SkRefCnt { +public: + SkPixelRef(int width, int height, void* addr, size_t rowBytes); + ~SkPixelRef() override; + + SkISize dimensions() const { return {fWidth, fHeight}; } + int width() const { return fWidth; } + int height() const { return fHeight; } + void* pixels() const { return fPixels; } + size_t rowBytes() const { return fRowBytes; } + + /** Returns a non-zero, unique value corresponding to the pixels in this + pixelref. Each time the pixels are changed (and notifyPixelsChanged is + called), a different generation ID will be returned. + */ + uint32_t getGenerationID() const; + + /** + * Call this if you have changed the contents of the pixels. This will in- + * turn cause a different generation ID value to be returned from + * getGenerationID(). + */ + void notifyPixelsChanged(); + + /** Returns true if this pixelref is marked as immutable, meaning that the + contents of its pixels will not change for the lifetime of the pixelref. + */ + bool isImmutable() const { return fMutability != kMutable; } + + /** Marks this pixelref is immutable, meaning that the contents of its + pixels will not change for the lifetime of the pixelref. This state can + be set on a pixelref, but it cannot be cleared once it is set. + */ + void setImmutable(); + + // Register a listener that may be called the next time our generation ID changes. + // + // We'll only call the listener if we're confident that we are the only SkPixelRef with this + // generation ID. If our generation ID changes and we decide not to call the listener, we'll + // never call it: you must add a new listener for each generation ID change. We also won't call + // the listener when we're certain no one knows what our generation ID is. + // + // This can be used to invalidate caches keyed by SkPixelRef generation ID. + // Takes ownership of listener. Threadsafe. + void addGenIDChangeListener(sk_sp listener); + + // Call when this pixelref is part of the key to a resourcecache entry. This allows the cache + // to know automatically those entries can be purged when this pixelref is changed or deleted. + void notifyAddedToCache() { + fAddedToCache.store(true); + } + + virtual SkDiscardableMemory* diagnostic_only_getDiscardable() const { return nullptr; } + +protected: + void android_only_reset(int width, int height, size_t rowBytes); + +private: + int fWidth; + int fHeight; + void* fPixels; + size_t fRowBytes; + + // Bottom bit indicates the Gen ID is unique. + bool genIDIsUnique() const { return SkToBool(fTaggedGenID.load() & 1); } + mutable std::atomic fTaggedGenID; + + SkIDChangeListener::List fGenIDChangeListeners; + + // Set true by caches when they cache content that's derived from the current pixels. + std::atomic fAddedToCache; + + enum Mutability { + kMutable, // PixelRefs begin mutable. + kTemporarilyImmutable, // Considered immutable, but can revert to mutable. + kImmutable, // Once set to this state, it never leaves. + } fMutability : 8; // easily fits inside a byte + + void needsNewGenID(); + void callGenIDChangeListeners(); + + void setTemporarilyImmutable(); + void restoreMutability(); + friend class SkSurface_Raster; // For temporary immutable methods above. + + void setImmutableWithID(uint32_t genID); + friend void SkBitmapCache_setImmutableWithID(SkPixelRef*, uint32_t); + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPixmap.h b/gfx/skia/skia/include/core/SkPixmap.h new file mode 100644 index 0000000000..e9e6de9ae6 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPixmap.h @@ -0,0 +1,748 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPixmap_DEFINED +#define SkPixmap_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkSize.h" +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkAttributes.h" + +#include +#include + +class SkColorSpace; +enum SkAlphaType : int; +struct SkMask; + +/** \class SkPixmap + SkPixmap provides a utility to pair SkImageInfo with pixels and row bytes. + SkPixmap is a low level class which provides convenience functions to access + raster destinations. SkCanvas can not draw SkPixmap, nor does SkPixmap provide + a direct drawing destination. + + Use SkBitmap to draw pixels referenced by SkPixmap; use SkSurface to draw into + pixels referenced by SkPixmap. + + SkPixmap does not try to manage the lifetime of the pixel memory. Use SkPixelRef + to manage pixel memory; SkPixelRef is safe across threads. +*/ +class SK_API SkPixmap { +public: + + /** Creates an empty SkPixmap without pixels, with kUnknown_SkColorType, with + kUnknown_SkAlphaType, and with a width and height of zero. Use + reset() to associate pixels, SkColorType, SkAlphaType, width, and height + after SkPixmap has been created. + + @return empty SkPixmap + */ + SkPixmap() + : fPixels(nullptr), fRowBytes(0), fInfo(SkImageInfo::MakeUnknown(0, 0)) + {} + + /** Creates SkPixmap from info width, height, SkAlphaType, and SkColorType. + addr points to pixels, or nullptr. rowBytes should be info.width() times + info.bytesPerPixel(), or larger. + + No parameter checking is performed; it is up to the caller to ensure that + addr and rowBytes agree with info. + + The memory lifetime of pixels is managed by the caller. When SkPixmap goes + out of scope, addr is unaffected. + + SkPixmap may be later modified by reset() to change its size, pixel type, or + storage. + + @param info width, height, SkAlphaType, SkColorType of SkImageInfo + @param addr pointer to pixels allocated by caller; may be nullptr + @param rowBytes size of one row of addr; width times pixel size, or larger + @return initialized SkPixmap + */ + SkPixmap(const SkImageInfo& info, const void* addr, size_t rowBytes) + : fPixels(addr), fRowBytes(rowBytes), fInfo(info) + {} + + /** Sets width, height, row bytes to zero; pixel address to nullptr; SkColorType to + kUnknown_SkColorType; and SkAlphaType to kUnknown_SkAlphaType. + + The prior pixels are unaffected; it is up to the caller to release pixels + memory if desired. + + example: https://fiddle.skia.org/c/@Pixmap_reset + */ + void reset(); + + /** Sets width, height, SkAlphaType, and SkColorType from info. + Sets pixel address from addr, which may be nullptr. + Sets row bytes from rowBytes, which should be info.width() times + info.bytesPerPixel(), or larger. + + Does not check addr. Asserts if built with SK_DEBUG defined and if rowBytes is + too small to hold one row of pixels. + + The memory lifetime pixels are managed by the caller. When SkPixmap goes + out of scope, addr is unaffected. + + @param info width, height, SkAlphaType, SkColorType of SkImageInfo + @param addr pointer to pixels allocated by caller; may be nullptr + @param rowBytes size of one row of addr; width times pixel size, or larger + + example: https://fiddle.skia.org/c/@Pixmap_reset_2 + */ + void reset(const SkImageInfo& info, const void* addr, size_t rowBytes); + + /** Changes SkColorSpace in SkImageInfo; preserves width, height, SkAlphaType, and + SkColorType in SkImage, and leaves pixel address and row bytes unchanged. + SkColorSpace reference count is incremented. + + @param colorSpace SkColorSpace moved to SkImageInfo + + example: https://fiddle.skia.org/c/@Pixmap_setColorSpace + */ + void setColorSpace(sk_sp colorSpace); + + /** Deprecated. + */ + bool SK_WARN_UNUSED_RESULT reset(const SkMask& mask); + + /** Sets subset width, height, pixel address to intersection of SkPixmap with area, + if intersection is not empty; and return true. Otherwise, leave subset unchanged + and return false. + + Failing to read the return value generates a compile time warning. + + @param subset storage for width, height, pixel address of intersection + @param area bounds to intersect with SkPixmap + @return true if intersection of SkPixmap and area is not empty + */ + bool SK_WARN_UNUSED_RESULT extractSubset(SkPixmap* subset, const SkIRect& area) const; + + /** Returns width, height, SkAlphaType, SkColorType, and SkColorSpace. + + @return reference to SkImageInfo + */ + const SkImageInfo& info() const { return fInfo; } + + /** Returns row bytes, the interval from one pixel row to the next. Row bytes + is at least as large as: width() * info().bytesPerPixel(). + + Returns zero if colorType() is kUnknown_SkColorType. + It is up to the SkBitmap creator to ensure that row bytes is a useful value. + + @return byte length of pixel row + */ + size_t rowBytes() const { return fRowBytes; } + + /** Returns pixel address, the base address corresponding to the pixel origin. + + It is up to the SkPixmap creator to ensure that pixel address is a useful value. + + @return pixel address + */ + const void* addr() const { return fPixels; } + + /** Returns pixel count in each pixel row. Should be equal or less than: + rowBytes() / info().bytesPerPixel(). + + @return pixel width in SkImageInfo + */ + int width() const { return fInfo.width(); } + + /** Returns pixel row count. + + @return pixel height in SkImageInfo + */ + int height() const { return fInfo.height(); } + + /** + * Return the dimensions of the pixmap (from its ImageInfo) + */ + SkISize dimensions() const { return fInfo.dimensions(); } + + SkColorType colorType() const { return fInfo.colorType(); } + + SkAlphaType alphaType() const { return fInfo.alphaType(); } + + /** Returns SkColorSpace, the range of colors, associated with SkImageInfo. The + reference count of SkColorSpace is unchanged. The returned SkColorSpace is + immutable. + + @return SkColorSpace in SkImageInfo, or nullptr + */ + SkColorSpace* colorSpace() const; + + /** Returns smart pointer to SkColorSpace, the range of colors, associated with + SkImageInfo. The smart pointer tracks the number of objects sharing this + SkColorSpace reference so the memory is released when the owners destruct. + + The returned SkColorSpace is immutable. + + @return SkColorSpace in SkImageInfo wrapped in a smart pointer + */ + sk_sp refColorSpace() const; + + /** Returns true if SkAlphaType is kOpaque_SkAlphaType. + Does not check if SkColorType allows alpha, or if any pixel value has + transparency. + + @return true if SkImageInfo has opaque SkAlphaType + */ + bool isOpaque() const { return fInfo.isOpaque(); } + + /** Returns SkIRect { 0, 0, width(), height() }. + + @return integral rectangle from origin to width() and height() + */ + SkIRect bounds() const { return SkIRect::MakeWH(this->width(), this->height()); } + + /** Returns number of pixels that fit on row. Should be greater than or equal to + width(). + + @return maximum pixels per row + */ + int rowBytesAsPixels() const { return int(fRowBytes >> this->shiftPerPixel()); } + + /** Returns bit shift converting row bytes to row pixels. + Returns zero for kUnknown_SkColorType. + + @return one of: 0, 1, 2, 3; left shift to convert pixels to bytes + */ + int shiftPerPixel() const { return fInfo.shiftPerPixel(); } + + /** Returns minimum memory required for pixel storage. + Does not include unused memory on last row when rowBytesAsPixels() exceeds width(). + Returns SIZE_MAX if result does not fit in size_t. + Returns zero if height() or width() is 0. + Returns height() times rowBytes() if colorType() is kUnknown_SkColorType. + + @return size in bytes of image buffer + */ + size_t computeByteSize() const { return fInfo.computeByteSize(fRowBytes); } + + /** Returns true if all pixels are opaque. SkColorType determines how pixels + are encoded, and whether pixel describes alpha. Returns true for SkColorType + without alpha in each pixel; for other SkColorType, returns true if all + pixels have alpha values equivalent to 1.0 or greater. + + For SkColorType kRGB_565_SkColorType or kGray_8_SkColorType: always + returns true. For SkColorType kAlpha_8_SkColorType, kBGRA_8888_SkColorType, + kRGBA_8888_SkColorType: returns true if all pixel alpha values are 255. + For SkColorType kARGB_4444_SkColorType: returns true if all pixel alpha values are 15. + For kRGBA_F16_SkColorType: returns true if all pixel alpha values are 1.0 or + greater. + + Returns false for kUnknown_SkColorType. + + @return true if all pixels have opaque values or SkColorType is opaque + + example: https://fiddle.skia.org/c/@Pixmap_computeIsOpaque + */ + bool computeIsOpaque() const; + + /** Returns pixel at (x, y) as unpremultiplied color. + Returns black with alpha if SkColorType is kAlpha_8_SkColorType. + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined; and returns undefined values or may crash if + SK_RELEASE is defined. Fails if SkColorType is kUnknown_SkColorType or + pixel address is nullptr. + + SkColorSpace in SkImageInfo is ignored. Some color precision may be lost in the + conversion to unpremultiplied color; original pixel data may have additional + precision. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return pixel converted to unpremultiplied color + + example: https://fiddle.skia.org/c/@Pixmap_getColor + */ + SkColor getColor(int x, int y) const; + + /** Returns pixel at (x, y) as unpremultiplied color as an SkColor4f. + Returns black with alpha if SkColorType is kAlpha_8_SkColorType. + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined; and returns undefined values or may crash if + SK_RELEASE is defined. Fails if SkColorType is kUnknown_SkColorType or + pixel address is nullptr. + + SkColorSpace in SkImageInfo is ignored. Some color precision may be lost in the + conversion to unpremultiplied color; original pixel data may have additional + precision, though this is less likely than for getColor(). Rounding errors may + occur if the underlying type has lower precision. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return pixel converted to unpremultiplied float color + */ + SkColor4f getColor4f(int x, int y) const; + + /** Look up the pixel at (x,y) and return its alpha component, normalized to [0..1]. + This is roughly equivalent to SkGetColorA(getColor()), but can be more efficent + (and more precise if the pixels store more than 8 bits per component). + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return alpha converted to normalized float + */ + float getAlphaf(int x, int y) const; + + /** Returns readable pixel address at (x, y). Returns nullptr if SkPixelRef is nullptr. + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined. Returns nullptr if SkColorType is kUnknown_SkColorType. + + Performs a lookup of pixel size; for better performance, call + one of: addr8, addr16, addr32, addr64, or addrF16(). + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return readable generic pointer to pixel + */ + const void* addr(int x, int y) const { + return (const char*)fPixels + fInfo.computeOffset(x, y, fRowBytes); + } + + /** Returns readable base pixel address. Result is addressable as unsigned 8-bit bytes. + Will trigger an assert() if SkColorType is not kAlpha_8_SkColorType or + kGray_8_SkColorType, and is built with SK_DEBUG defined. + + One byte corresponds to one pixel. + + @return readable unsigned 8-bit pointer to pixels + */ + const uint8_t* addr8() const { + SkASSERT(1 == fInfo.bytesPerPixel()); + return reinterpret_cast(fPixels); + } + + /** Returns readable base pixel address. Result is addressable as unsigned 16-bit words. + Will trigger an assert() if SkColorType is not kRGB_565_SkColorType or + kARGB_4444_SkColorType, and is built with SK_DEBUG defined. + + One word corresponds to one pixel. + + @return readable unsigned 16-bit pointer to pixels + */ + const uint16_t* addr16() const { + SkASSERT(2 == fInfo.bytesPerPixel()); + return reinterpret_cast(fPixels); + } + + /** Returns readable base pixel address. Result is addressable as unsigned 32-bit words. + Will trigger an assert() if SkColorType is not kRGBA_8888_SkColorType or + kBGRA_8888_SkColorType, and is built with SK_DEBUG defined. + + One word corresponds to one pixel. + + @return readable unsigned 32-bit pointer to pixels + */ + const uint32_t* addr32() const { + SkASSERT(4 == fInfo.bytesPerPixel()); + return reinterpret_cast(fPixels); + } + + /** Returns readable base pixel address. Result is addressable as unsigned 64-bit words. + Will trigger an assert() if SkColorType is not kRGBA_F16_SkColorType and is built + with SK_DEBUG defined. + + One word corresponds to one pixel. + + @return readable unsigned 64-bit pointer to pixels + */ + const uint64_t* addr64() const { + SkASSERT(8 == fInfo.bytesPerPixel()); + return reinterpret_cast(fPixels); + } + + /** Returns readable base pixel address. Result is addressable as unsigned 16-bit words. + Will trigger an assert() if SkColorType is not kRGBA_F16_SkColorType and is built + with SK_DEBUG defined. + + Each word represents one color component encoded as a half float. + Four words correspond to one pixel. + + @return readable unsigned 16-bit pointer to first component of pixels + */ + const uint16_t* addrF16() const { + SkASSERT(8 == fInfo.bytesPerPixel()); + SkASSERT(kRGBA_F16_SkColorType == fInfo.colorType() || + kRGBA_F16Norm_SkColorType == fInfo.colorType()); + return reinterpret_cast(fPixels); + } + + /** Returns readable pixel address at (x, y). + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined. + + Will trigger an assert() if SkColorType is not kAlpha_8_SkColorType or + kGray_8_SkColorType, and is built with SK_DEBUG defined. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return readable unsigned 8-bit pointer to pixel at (x, y) + */ + const uint8_t* addr8(int x, int y) const { + SkASSERT((unsigned)x < (unsigned)fInfo.width()); + SkASSERT((unsigned)y < (unsigned)fInfo.height()); + return (const uint8_t*)((const char*)this->addr8() + (size_t)y * fRowBytes + (x << 0)); + } + + /** Returns readable pixel address at (x, y). + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined. + + Will trigger an assert() if SkColorType is not kRGB_565_SkColorType or + kARGB_4444_SkColorType, and is built with SK_DEBUG defined. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return readable unsigned 16-bit pointer to pixel at (x, y) + */ + const uint16_t* addr16(int x, int y) const { + SkASSERT((unsigned)x < (unsigned)fInfo.width()); + SkASSERT((unsigned)y < (unsigned)fInfo.height()); + return (const uint16_t*)((const char*)this->addr16() + (size_t)y * fRowBytes + (x << 1)); + } + + /** Returns readable pixel address at (x, y). + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined. + + Will trigger an assert() if SkColorType is not kRGBA_8888_SkColorType or + kBGRA_8888_SkColorType, and is built with SK_DEBUG defined. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return readable unsigned 32-bit pointer to pixel at (x, y) + */ + const uint32_t* addr32(int x, int y) const { + SkASSERT((unsigned)x < (unsigned)fInfo.width()); + SkASSERT((unsigned)y < (unsigned)fInfo.height()); + return (const uint32_t*)((const char*)this->addr32() + (size_t)y * fRowBytes + (x << 2)); + } + + /** Returns readable pixel address at (x, y). + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined. + + Will trigger an assert() if SkColorType is not kRGBA_F16_SkColorType and is built + with SK_DEBUG defined. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return readable unsigned 64-bit pointer to pixel at (x, y) + */ + const uint64_t* addr64(int x, int y) const { + SkASSERT((unsigned)x < (unsigned)fInfo.width()); + SkASSERT((unsigned)y < (unsigned)fInfo.height()); + return (const uint64_t*)((const char*)this->addr64() + (size_t)y * fRowBytes + (x << 3)); + } + + /** Returns readable pixel address at (x, y). + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined. + + Will trigger an assert() if SkColorType is not kRGBA_F16_SkColorType and is built + with SK_DEBUG defined. + + Each unsigned 16-bit word represents one color component encoded as a half float. + Four words correspond to one pixel. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return readable unsigned 16-bit pointer to pixel component at (x, y) + */ + const uint16_t* addrF16(int x, int y) const { + SkASSERT(kRGBA_F16_SkColorType == fInfo.colorType() || + kRGBA_F16Norm_SkColorType == fInfo.colorType()); + return reinterpret_cast(this->addr64(x, y)); + } + + /** Returns writable base pixel address. + + @return writable generic base pointer to pixels + */ + void* writable_addr() const { return const_cast(fPixels); } + + /** Returns writable pixel address at (x, y). + + Input is not validated: out of bounds values of x or y trigger an assert() if + built with SK_DEBUG defined. Returns zero if SkColorType is kUnknown_SkColorType. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return writable generic pointer to pixel + */ + void* writable_addr(int x, int y) const { + return const_cast(this->addr(x, y)); + } + + /** Returns writable pixel address at (x, y). Result is addressable as unsigned + 8-bit bytes. Will trigger an assert() if SkColorType is not kAlpha_8_SkColorType + or kGray_8_SkColorType, and is built with SK_DEBUG defined. + + One byte corresponds to one pixel. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return writable unsigned 8-bit pointer to pixels + */ + uint8_t* writable_addr8(int x, int y) const { + return const_cast(this->addr8(x, y)); + } + + /** Returns writable_addr pixel address at (x, y). Result is addressable as unsigned + 16-bit words. Will trigger an assert() if SkColorType is not kRGB_565_SkColorType + or kARGB_4444_SkColorType, and is built with SK_DEBUG defined. + + One word corresponds to one pixel. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return writable unsigned 16-bit pointer to pixel + */ + uint16_t* writable_addr16(int x, int y) const { + return const_cast(this->addr16(x, y)); + } + + /** Returns writable pixel address at (x, y). Result is addressable as unsigned + 32-bit words. Will trigger an assert() if SkColorType is not + kRGBA_8888_SkColorType or kBGRA_8888_SkColorType, and is built with SK_DEBUG + defined. + + One word corresponds to one pixel. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return writable unsigned 32-bit pointer to pixel + */ + uint32_t* writable_addr32(int x, int y) const { + return const_cast(this->addr32(x, y)); + } + + /** Returns writable pixel address at (x, y). Result is addressable as unsigned + 64-bit words. Will trigger an assert() if SkColorType is not + kRGBA_F16_SkColorType and is built with SK_DEBUG defined. + + One word corresponds to one pixel. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return writable unsigned 64-bit pointer to pixel + */ + uint64_t* writable_addr64(int x, int y) const { + return const_cast(this->addr64(x, y)); + } + + /** Returns writable pixel address at (x, y). Result is addressable as unsigned + 16-bit words. Will trigger an assert() if SkColorType is not + kRGBA_F16_SkColorType and is built with SK_DEBUG defined. + + Each word represents one color component encoded as a half float. + Four words correspond to one pixel. + + @param x column index, zero or greater, and less than width() + @param y row index, zero or greater, and less than height() + @return writable unsigned 16-bit pointer to first component of pixel + */ + uint16_t* writable_addrF16(int x, int y) const { + return reinterpret_cast(writable_addr64(x, y)); + } + + /** Copies a SkRect of pixels to dstPixels. Copy starts at (0, 0), and does not + exceed SkPixmap (width(), height()). + + dstInfo specifies width, height, SkColorType, SkAlphaType, and + SkColorSpace of destination. dstRowBytes specifics the gap from one destination + row to the next. Returns true if pixels are copied. Returns false if + dstInfo address equals nullptr, or dstRowBytes is less than dstInfo.minRowBytes(). + + Pixels are copied only if pixel conversion is possible. If SkPixmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dstInfo.colorType() must match. + If SkPixmap colorType() is kGray_8_SkColorType, dstInfo.colorSpace() must match. + If SkPixmap alphaType() is kOpaque_SkAlphaType, dstInfo.alphaType() must + match. If SkPixmap colorSpace() is nullptr, dstInfo.colorSpace() must match. Returns + false if pixel conversion is not possible. + + Returns false if SkPixmap width() or height() is zero or negative. + + @param dstInfo destination width, height, SkColorType, SkAlphaType, SkColorSpace + @param dstPixels destination pixel storage + @param dstRowBytes destination row length + @return true if pixels are copied to dstPixels + */ + bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes) const { + return this->readPixels(dstInfo, dstPixels, dstRowBytes, 0, 0); + } + + /** Copies a SkRect of pixels to dstPixels. Copy starts at (srcX, srcY), and does not + exceed SkPixmap (width(), height()). + + dstInfo specifies width, height, SkColorType, SkAlphaType, and + SkColorSpace of destination. dstRowBytes specifics the gap from one destination + row to the next. Returns true if pixels are copied. Returns false if + dstInfo address equals nullptr, or dstRowBytes is less than dstInfo.minRowBytes(). + + Pixels are copied only if pixel conversion is possible. If SkPixmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dstInfo.colorType() must match. + If SkPixmap colorType() is kGray_8_SkColorType, dstInfo.colorSpace() must match. + If SkPixmap alphaType() is kOpaque_SkAlphaType, dstInfo.alphaType() must + match. If SkPixmap colorSpace() is nullptr, dstInfo.colorSpace() must match. Returns + false if pixel conversion is not possible. + + srcX and srcY may be negative to copy only top or left of source. Returns + false if SkPixmap width() or height() is zero or negative. Returns false if: + abs(srcX) >= Pixmap width(), or if abs(srcY) >= Pixmap height(). + + @param dstInfo destination width, height, SkColorType, SkAlphaType, SkColorSpace + @param dstPixels destination pixel storage + @param dstRowBytes destination row length + @param srcX column index whose absolute value is less than width() + @param srcY row index whose absolute value is less than height() + @return true if pixels are copied to dstPixels + */ + bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, int srcX, + int srcY) const; + + /** Copies a SkRect of pixels to dst. Copy starts at (srcX, srcY), and does not + exceed SkPixmap (width(), height()). dst specifies width, height, SkColorType, + SkAlphaType, and SkColorSpace of destination. Returns true if pixels are copied. + Returns false if dst address equals nullptr, or dst.rowBytes() is less than + dst SkImageInfo::minRowBytes. + + Pixels are copied only if pixel conversion is possible. If SkPixmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dst.info().colorType must match. + If SkPixmap colorType() is kGray_8_SkColorType, dst.info().colorSpace must match. + If SkPixmap alphaType() is kOpaque_SkAlphaType, dst.info().alphaType must + match. If SkPixmap colorSpace() is nullptr, dst.info().colorSpace must match. Returns + false if pixel conversion is not possible. + + srcX and srcY may be negative to copy only top or left of source. Returns + false SkPixmap width() or height() is zero or negative. Returns false if: + abs(srcX) >= Pixmap width(), or if abs(srcY) >= Pixmap height(). + + @param dst SkImageInfo and pixel address to write to + @param srcX column index whose absolute value is less than width() + @param srcY row index whose absolute value is less than height() + @return true if pixels are copied to dst + */ + bool readPixels(const SkPixmap& dst, int srcX, int srcY) const { + return this->readPixels(dst.info(), dst.writable_addr(), dst.rowBytes(), srcX, srcY); + } + + /** Copies pixels inside bounds() to dst. dst specifies width, height, SkColorType, + SkAlphaType, and SkColorSpace of destination. Returns true if pixels are copied. + Returns false if dst address equals nullptr, or dst.rowBytes() is less than + dst SkImageInfo::minRowBytes. + + Pixels are copied only if pixel conversion is possible. If SkPixmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dst SkColorType must match. + If SkPixmap colorType() is kGray_8_SkColorType, dst SkColorSpace must match. + If SkPixmap alphaType() is kOpaque_SkAlphaType, dst SkAlphaType must + match. If SkPixmap colorSpace() is nullptr, dst SkColorSpace must match. Returns + false if pixel conversion is not possible. + + Returns false if SkPixmap width() or height() is zero or negative. + + @param dst SkImageInfo and pixel address to write to + @return true if pixels are copied to dst + */ + bool readPixels(const SkPixmap& dst) const { + return this->readPixels(dst.info(), dst.writable_addr(), dst.rowBytes(), 0, 0); + } + + /** Copies SkBitmap to dst, scaling pixels to fit dst.width() and dst.height(), and + converting pixels to match dst.colorType() and dst.alphaType(). Returns true if + pixels are copied. Returns false if dst address is nullptr, or dst.rowBytes() is + less than dst SkImageInfo::minRowBytes. + + Pixels are copied only if pixel conversion is possible. If SkPixmap colorType() is + kGray_8_SkColorType, or kAlpha_8_SkColorType; dst SkColorType must match. + If SkPixmap colorType() is kGray_8_SkColorType, dst SkColorSpace must match. + If SkPixmap alphaType() is kOpaque_SkAlphaType, dst SkAlphaType must + match. If SkPixmap colorSpace() is nullptr, dst SkColorSpace must match. Returns + false if pixel conversion is not possible. + + Returns false if SkBitmap width() or height() is zero or negative. + + @param dst SkImageInfo and pixel address to write to + @return true if pixels are scaled to fit dst + + example: https://fiddle.skia.org/c/@Pixmap_scalePixels + */ + bool scalePixels(const SkPixmap& dst, const SkSamplingOptions&) const; + + /** Writes color to pixels bounded by subset; returns true on success. + Returns false if colorType() is kUnknown_SkColorType, or if subset does + not intersect bounds(). + + @param color sRGB unpremultiplied color to write + @param subset bounding integer SkRect of written pixels + @return true if pixels are changed + + example: https://fiddle.skia.org/c/@Pixmap_erase + */ + bool erase(SkColor color, const SkIRect& subset) const; + + /** Writes color to pixels inside bounds(); returns true on success. + Returns false if colorType() is kUnknown_SkColorType, or if bounds() + is empty. + + @param color sRGB unpremultiplied color to write + @return true if pixels are changed + */ + bool erase(SkColor color) const { return this->erase(color, this->bounds()); } + + /** Writes color to pixels bounded by subset; returns true on success. + if subset is nullptr, writes colors pixels inside bounds(). Returns false if + colorType() is kUnknown_SkColorType, if subset is not nullptr and does + not intersect bounds(), or if subset is nullptr and bounds() is empty. + + @param color sRGB unpremultiplied color to write + @param subset bounding integer SkRect of pixels to write; may be nullptr + @return true if pixels are changed + + example: https://fiddle.skia.org/c/@Pixmap_erase_3 + */ + bool erase(const SkColor4f& color, const SkIRect* subset = nullptr) const { + return this->erase(color, nullptr, subset); + } + + /** Writes color to pixels bounded by subset; returns true on success. + if subset is nullptr, writes colors pixels inside bounds(). Returns false if + colorType() is kUnknown_SkColorType, if subset is not nullptr and does + not intersect bounds(), or if subset is nullptr and bounds() is empty. + + @param color unpremultiplied color to write + @param cs SkColorSpace of color + @param subset bounding integer SkRect of pixels to write; may be nullptr + @return true if pixels are changed + */ + bool erase(const SkColor4f& color, SkColorSpace* cs, const SkIRect* subset = nullptr) const; + +private: + const void* fPixels; + size_t fRowBytes; + SkImageInfo fInfo; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPoint.h b/gfx/skia/skia/include/core/SkPoint.h new file mode 100644 index 0000000000..a5e7fa09fb --- /dev/null +++ b/gfx/skia/skia/include/core/SkPoint.h @@ -0,0 +1,568 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPoint_DEFINED +#define SkPoint_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkSafe32.h" + +#include + +struct SkIPoint; + +/** SkIVector provides an alternative name for SkIPoint. SkIVector and SkIPoint + can be used interchangeably for all purposes. +*/ +typedef SkIPoint SkIVector; + +/** \struct SkIPoint + SkIPoint holds two 32-bit integer coordinates. +*/ +struct SkIPoint { + int32_t fX; //!< x-axis value + int32_t fY; //!< y-axis value + + /** Sets fX to x, fY to y. + + @param x integer x-axis value of constructed SkIPoint + @param y integer y-axis value of constructed SkIPoint + @return SkIPoint (x, y) + */ + static constexpr SkIPoint Make(int32_t x, int32_t y) { + return {x, y}; + } + + /** Returns x-axis value of SkIPoint. + + @return fX + */ + constexpr int32_t x() const { return fX; } + + /** Returns y-axis value of SkIPoint. + + @return fY + */ + constexpr int32_t y() const { return fY; } + + /** Returns true if fX and fY are both zero. + + @return true if fX is zero and fY is zero + */ + bool isZero() const { return (fX | fY) == 0; } + + /** Sets fX to x and fY to y. + + @param x new value for fX + @param y new value for fY + */ + void set(int32_t x, int32_t y) { + fX = x; + fY = y; + } + + /** Returns SkIPoint changing the signs of fX and fY. + + @return SkIPoint as (-fX, -fY) + */ + SkIPoint operator-() const { + return {-fX, -fY}; + } + + /** Offsets SkIPoint by ivector v. Sets SkIPoint to (fX + v.fX, fY + v.fY). + + @param v ivector to add + */ + void operator+=(const SkIVector& v) { + fX = Sk32_sat_add(fX, v.fX); + fY = Sk32_sat_add(fY, v.fY); + } + + /** Subtracts ivector v from SkIPoint. Sets SkIPoint to: (fX - v.fX, fY - v.fY). + + @param v ivector to subtract + */ + void operator-=(const SkIVector& v) { + fX = Sk32_sat_sub(fX, v.fX); + fY = Sk32_sat_sub(fY, v.fY); + } + + /** Returns true if SkIPoint is equivalent to SkIPoint constructed from (x, y). + + @param x value compared with fX + @param y value compared with fY + @return true if SkIPoint equals (x, y) + */ + bool equals(int32_t x, int32_t y) const { + return fX == x && fY == y; + } + + /** Returns true if a is equivalent to b. + + @param a SkIPoint to compare + @param b SkIPoint to compare + @return true if a.fX == b.fX and a.fY == b.fY + */ + friend bool operator==(const SkIPoint& a, const SkIPoint& b) { + return a.fX == b.fX && a.fY == b.fY; + } + + /** Returns true if a is not equivalent to b. + + @param a SkIPoint to compare + @param b SkIPoint to compare + @return true if a.fX != b.fX or a.fY != b.fY + */ + friend bool operator!=(const SkIPoint& a, const SkIPoint& b) { + return a.fX != b.fX || a.fY != b.fY; + } + + /** Returns ivector from b to a; computed as (a.fX - b.fX, a.fY - b.fY). + + Can also be used to subtract ivector from ivector, returning ivector. + + @param a SkIPoint or ivector to subtract from + @param b ivector to subtract + @return ivector from b to a + */ + friend SkIVector operator-(const SkIPoint& a, const SkIPoint& b) { + return { Sk32_sat_sub(a.fX, b.fX), Sk32_sat_sub(a.fY, b.fY) }; + } + + /** Returns SkIPoint resulting from SkIPoint a offset by ivector b, computed as: + (a.fX + b.fX, a.fY + b.fY). + + Can also be used to offset SkIPoint b by ivector a, returning SkIPoint. + Can also be used to add ivector to ivector, returning ivector. + + @param a SkIPoint or ivector to add to + @param b SkIPoint or ivector to add + @return SkIPoint equal to a offset by b + */ + friend SkIPoint operator+(const SkIPoint& a, const SkIVector& b) { + return { Sk32_sat_add(a.fX, b.fX), Sk32_sat_add(a.fY, b.fY) }; + } +}; + +struct SkPoint; + +/** SkVector provides an alternative name for SkPoint. SkVector and SkPoint can + be used interchangeably for all purposes. +*/ +typedef SkPoint SkVector; + +/** \struct SkPoint + SkPoint holds two 32-bit floating point coordinates. +*/ +struct SK_API SkPoint { + SkScalar fX; //!< x-axis value + SkScalar fY; //!< y-axis value + + /** Sets fX to x, fY to y. Used both to set SkPoint and vector. + + @param x SkScalar x-axis value of constructed SkPoint or vector + @param y SkScalar y-axis value of constructed SkPoint or vector + @return SkPoint (x, y) + */ + static constexpr SkPoint Make(SkScalar x, SkScalar y) { + return {x, y}; + } + + /** Returns x-axis value of SkPoint or vector. + + @return fX + */ + constexpr SkScalar x() const { return fX; } + + /** Returns y-axis value of SkPoint or vector. + + @return fY + */ + constexpr SkScalar y() const { return fY; } + + /** Returns true if fX and fY are both zero. + + @return true if fX is zero and fY is zero + */ + bool isZero() const { return (0 == fX) & (0 == fY); } + + /** Sets fX to x and fY to y. + + @param x new value for fX + @param y new value for fY + */ + void set(SkScalar x, SkScalar y) { + fX = x; + fY = y; + } + + /** Sets fX to x and fY to y, promoting integers to SkScalar values. + + Assigning a large integer value directly to fX or fY may cause a compiler + error, triggered by narrowing conversion of int to SkScalar. This safely + casts x and y to avoid the error. + + @param x new value for fX + @param y new value for fY + */ + void iset(int32_t x, int32_t y) { + fX = SkIntToScalar(x); + fY = SkIntToScalar(y); + } + + /** Sets fX to p.fX and fY to p.fY, promoting integers to SkScalar values. + + Assigning an SkIPoint containing a large integer value directly to fX or fY may + cause a compiler error, triggered by narrowing conversion of int to SkScalar. + This safely casts p.fX and p.fY to avoid the error. + + @param p SkIPoint members promoted to SkScalar + */ + void iset(const SkIPoint& p) { + fX = SkIntToScalar(p.fX); + fY = SkIntToScalar(p.fY); + } + + /** Sets fX to absolute value of pt.fX; and fY to absolute value of pt.fY. + + @param pt members providing magnitude for fX and fY + */ + void setAbs(const SkPoint& pt) { + fX = SkScalarAbs(pt.fX); + fY = SkScalarAbs(pt.fY); + } + + /** Adds offset to each SkPoint in points array with count entries. + + @param points SkPoint array + @param count entries in array + @param offset vector added to points + */ + static void Offset(SkPoint points[], int count, const SkVector& offset) { + Offset(points, count, offset.fX, offset.fY); + } + + /** Adds offset (dx, dy) to each SkPoint in points array of length count. + + @param points SkPoint array + @param count entries in array + @param dx added to fX in points + @param dy added to fY in points + */ + static void Offset(SkPoint points[], int count, SkScalar dx, SkScalar dy) { + for (int i = 0; i < count; ++i) { + points[i].offset(dx, dy); + } + } + + /** Adds offset (dx, dy) to SkPoint. + + @param dx added to fX + @param dy added to fY + */ + void offset(SkScalar dx, SkScalar dy) { + fX += dx; + fY += dy; + } + + /** Returns the Euclidean distance from origin, computed as: + + sqrt(fX * fX + fY * fY) + + . + + @return straight-line distance to origin + */ + SkScalar length() const { return SkPoint::Length(fX, fY); } + + /** Returns the Euclidean distance from origin, computed as: + + sqrt(fX * fX + fY * fY) + + . + + @return straight-line distance to origin + */ + SkScalar distanceToOrigin() const { return this->length(); } + + /** Scales (fX, fY) so that length() returns one, while preserving ratio of fX to fY, + if possible. If prior length is nearly zero, sets vector to (0, 0) and returns + false; otherwise returns true. + + @return true if former length is not zero or nearly zero + + example: https://fiddle.skia.org/c/@Point_normalize_2 + */ + bool normalize(); + + /** Sets vector to (x, y) scaled so length() returns one, and so that + (fX, fY) is proportional to (x, y). If (x, y) length is nearly zero, + sets vector to (0, 0) and returns false; otherwise returns true. + + @param x proportional value for fX + @param y proportional value for fY + @return true if (x, y) length is not zero or nearly zero + + example: https://fiddle.skia.org/c/@Point_setNormalize + */ + bool setNormalize(SkScalar x, SkScalar y); + + /** Scales vector so that distanceToOrigin() returns length, if possible. If former + length is nearly zero, sets vector to (0, 0) and return false; otherwise returns + true. + + @param length straight-line distance to origin + @return true if former length is not zero or nearly zero + + example: https://fiddle.skia.org/c/@Point_setLength + */ + bool setLength(SkScalar length); + + /** Sets vector to (x, y) scaled to length, if possible. If former + length is nearly zero, sets vector to (0, 0) and return false; otherwise returns + true. + + @param x proportional value for fX + @param y proportional value for fY + @param length straight-line distance to origin + @return true if (x, y) length is not zero or nearly zero + + example: https://fiddle.skia.org/c/@Point_setLength_2 + */ + bool setLength(SkScalar x, SkScalar y, SkScalar length); + + /** Sets dst to SkPoint times scale. dst may be SkPoint to modify SkPoint in place. + + @param scale factor to multiply SkPoint by + @param dst storage for scaled SkPoint + + example: https://fiddle.skia.org/c/@Point_scale + */ + void scale(SkScalar scale, SkPoint* dst) const; + + /** Scales SkPoint in place by scale. + + @param value factor to multiply SkPoint by + */ + void scale(SkScalar value) { this->scale(value, this); } + + /** Changes the sign of fX and fY. + */ + void negate() { + fX = -fX; + fY = -fY; + } + + /** Returns SkPoint changing the signs of fX and fY. + + @return SkPoint as (-fX, -fY) + */ + SkPoint operator-() const { + return {-fX, -fY}; + } + + /** Adds vector v to SkPoint. Sets SkPoint to: (fX + v.fX, fY + v.fY). + + @param v vector to add + */ + void operator+=(const SkVector& v) { + fX += v.fX; + fY += v.fY; + } + + /** Subtracts vector v from SkPoint. Sets SkPoint to: (fX - v.fX, fY - v.fY). + + @param v vector to subtract + */ + void operator-=(const SkVector& v) { + fX -= v.fX; + fY -= v.fY; + } + + /** Returns SkPoint multiplied by scale. + + @param scale scalar to multiply by + @return SkPoint as (fX * scale, fY * scale) + */ + SkPoint operator*(SkScalar scale) const { + return {fX * scale, fY * scale}; + } + + /** Multiplies SkPoint by scale. Sets SkPoint to: (fX * scale, fY * scale). + + @param scale scalar to multiply by + @return reference to SkPoint + */ + SkPoint& operator*=(SkScalar scale) { + fX *= scale; + fY *= scale; + return *this; + } + + /** Returns true if both fX and fY are measurable values. + + @return true for values other than infinities and NaN + */ + bool isFinite() const { + SkScalar accum = 0; + accum *= fX; + accum *= fY; + + // accum is either NaN or it is finite (zero). + SkASSERT(0 == accum || SkScalarIsNaN(accum)); + + // value==value will be true iff value is not NaN + // TODO: is it faster to say !accum or accum==accum? + return !SkScalarIsNaN(accum); + } + + /** Returns true if SkPoint is equivalent to SkPoint constructed from (x, y). + + @param x value compared with fX + @param y value compared with fY + @return true if SkPoint equals (x, y) + */ + bool equals(SkScalar x, SkScalar y) const { + return fX == x && fY == y; + } + + /** Returns true if a is equivalent to b. + + @param a SkPoint to compare + @param b SkPoint to compare + @return true if a.fX == b.fX and a.fY == b.fY + */ + friend bool operator==(const SkPoint& a, const SkPoint& b) { + return a.fX == b.fX && a.fY == b.fY; + } + + /** Returns true if a is not equivalent to b. + + @param a SkPoint to compare + @param b SkPoint to compare + @return true if a.fX != b.fX or a.fY != b.fY + */ + friend bool operator!=(const SkPoint& a, const SkPoint& b) { + return a.fX != b.fX || a.fY != b.fY; + } + + /** Returns vector from b to a, computed as (a.fX - b.fX, a.fY - b.fY). + + Can also be used to subtract vector from SkPoint, returning SkPoint. + Can also be used to subtract vector from vector, returning vector. + + @param a SkPoint to subtract from + @param b SkPoint to subtract + @return vector from b to a + */ + friend SkVector operator-(const SkPoint& a, const SkPoint& b) { + return {a.fX - b.fX, a.fY - b.fY}; + } + + /** Returns SkPoint resulting from SkPoint a offset by vector b, computed as: + (a.fX + b.fX, a.fY + b.fY). + + Can also be used to offset SkPoint b by vector a, returning SkPoint. + Can also be used to add vector to vector, returning vector. + + @param a SkPoint or vector to add to + @param b SkPoint or vector to add + @return SkPoint equal to a offset by b + */ + friend SkPoint operator+(const SkPoint& a, const SkVector& b) { + return {a.fX + b.fX, a.fY + b.fY}; + } + + /** Returns the Euclidean distance from origin, computed as: + + sqrt(x * x + y * y) + + . + + @param x component of length + @param y component of length + @return straight-line distance to origin + + example: https://fiddle.skia.org/c/@Point_Length + */ + static SkScalar Length(SkScalar x, SkScalar y); + + /** Scales (vec->fX, vec->fY) so that length() returns one, while preserving ratio of vec->fX + to vec->fY, if possible. If original length is nearly zero, sets vec to (0, 0) and returns + zero; otherwise, returns length of vec before vec is scaled. + + Returned prior length may be SK_ScalarInfinity if it can not be represented by SkScalar. + + Note that normalize() is faster if prior length is not required. + + @param vec normalized to unit length + @return original vec length + + example: https://fiddle.skia.org/c/@Point_Normalize + */ + static SkScalar Normalize(SkVector* vec); + + /** Returns the Euclidean distance between a and b. + + @param a line end point + @param b line end point + @return straight-line distance from a to b + */ + static SkScalar Distance(const SkPoint& a, const SkPoint& b) { + return Length(a.fX - b.fX, a.fY - b.fY); + } + + /** Returns the dot product of vector a and vector b. + + @param a left side of dot product + @param b right side of dot product + @return product of input magnitudes and cosine of the angle between them + */ + static SkScalar DotProduct(const SkVector& a, const SkVector& b) { + return a.fX * b.fX + a.fY * b.fY; + } + + /** Returns the cross product of vector a and vector b. + + a and b form three-dimensional vectors with z-axis value equal to zero. The + cross product is a three-dimensional vector with x-axis and y-axis values equal + to zero. The cross product z-axis component is returned. + + @param a left side of cross product + @param b right side of cross product + @return area spanned by vectors signed by angle direction + */ + static SkScalar CrossProduct(const SkVector& a, const SkVector& b) { + return a.fX * b.fY - a.fY * b.fX; + } + + /** Returns the cross product of vector and vec. + + Vector and vec form three-dimensional vectors with z-axis value equal to zero. + The cross product is a three-dimensional vector with x-axis and y-axis values + equal to zero. The cross product z-axis component is returned. + + @param vec right side of cross product + @return area spanned by vectors signed by angle direction + */ + SkScalar cross(const SkVector& vec) const { + return CrossProduct(*this, vec); + } + + /** Returns the dot product of vector and vector vec. + + @param vec right side of dot product + @return product of input magnitudes and cosine of the angle between them + */ + SkScalar dot(const SkVector& vec) const { + return DotProduct(*this, vec); + } + +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkPoint3.h b/gfx/skia/skia/include/core/SkPoint3.h new file mode 100644 index 0000000000..e372f82791 --- /dev/null +++ b/gfx/skia/skia/include/core/SkPoint3.h @@ -0,0 +1,157 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPoint3_DEFINED +#define SkPoint3_DEFINED + +#include "include/core/SkPoint.h" + +struct SK_API SkPoint3 { + SkScalar fX, fY, fZ; + + static SkPoint3 Make(SkScalar x, SkScalar y, SkScalar z) { + SkPoint3 pt; + pt.set(x, y, z); + return pt; + } + + SkScalar x() const { return fX; } + SkScalar y() const { return fY; } + SkScalar z() const { return fZ; } + + void set(SkScalar x, SkScalar y, SkScalar z) { fX = x; fY = y; fZ = z; } + + friend bool operator==(const SkPoint3& a, const SkPoint3& b) { + return a.fX == b.fX && a.fY == b.fY && a.fZ == b.fZ; + } + + friend bool operator!=(const SkPoint3& a, const SkPoint3& b) { + return !(a == b); + } + + /** Returns the Euclidian distance from (0,0,0) to (x,y,z) + */ + static SkScalar Length(SkScalar x, SkScalar y, SkScalar z); + + /** Return the Euclidian distance from (0,0,0) to the point + */ + SkScalar length() const { return SkPoint3::Length(fX, fY, fZ); } + + /** Set the point (vector) to be unit-length in the same direction as it + already points. If the point has a degenerate length (i.e., nearly 0) + then set it to (0,0,0) and return false; otherwise return true. + */ + bool normalize(); + + /** Return a new point whose X, Y and Z coordinates are scaled. + */ + SkPoint3 makeScale(SkScalar scale) const { + SkPoint3 p; + p.set(scale * fX, scale * fY, scale * fZ); + return p; + } + + /** Scale the point's coordinates by scale. + */ + void scale(SkScalar value) { + fX *= value; + fY *= value; + fZ *= value; + } + + /** Return a new point whose X, Y and Z coordinates are the negative of the + original point's + */ + SkPoint3 operator-() const { + SkPoint3 neg; + neg.fX = -fX; + neg.fY = -fY; + neg.fZ = -fZ; + return neg; + } + + /** Returns a new point whose coordinates are the difference between + a and b (i.e., a - b) + */ + friend SkPoint3 operator-(const SkPoint3& a, const SkPoint3& b) { + return { a.fX - b.fX, a.fY - b.fY, a.fZ - b.fZ }; + } + + /** Returns a new point whose coordinates are the sum of a and b (a + b) + */ + friend SkPoint3 operator+(const SkPoint3& a, const SkPoint3& b) { + return { a.fX + b.fX, a.fY + b.fY, a.fZ + b.fZ }; + } + + /** Add v's coordinates to the point's + */ + void operator+=(const SkPoint3& v) { + fX += v.fX; + fY += v.fY; + fZ += v.fZ; + } + + /** Subtract v's coordinates from the point's + */ + void operator-=(const SkPoint3& v) { + fX -= v.fX; + fY -= v.fY; + fZ -= v.fZ; + } + + friend SkPoint3 operator*(SkScalar t, SkPoint3 p) { + return { t * p.fX, t * p.fY, t * p.fZ }; + } + + /** Returns true if fX, fY, and fZ are measurable values. + + @return true for values other than infinities and NaN + */ + bool isFinite() const { + SkScalar accum = 0; + accum *= fX; + accum *= fY; + accum *= fZ; + + // accum is either NaN or it is finite (zero). + SkASSERT(0 == accum || SkScalarIsNaN(accum)); + + // value==value will be true iff value is not NaN + // TODO: is it faster to say !accum or accum==accum? + return !SkScalarIsNaN(accum); + } + + /** Returns the dot product of a and b, treating them as 3D vectors + */ + static SkScalar DotProduct(const SkPoint3& a, const SkPoint3& b) { + return a.fX * b.fX + a.fY * b.fY + a.fZ * b.fZ; + } + + SkScalar dot(const SkPoint3& vec) const { + return DotProduct(*this, vec); + } + + /** Returns the cross product of a and b, treating them as 3D vectors + */ + static SkPoint3 CrossProduct(const SkPoint3& a, const SkPoint3& b) { + SkPoint3 result; + result.fX = a.fY*b.fZ - a.fZ*b.fY; + result.fY = a.fZ*b.fX - a.fX*b.fZ; + result.fZ = a.fX*b.fY - a.fY*b.fX; + + return result; + } + + SkPoint3 cross(const SkPoint3& vec) const { + return CrossProduct(*this, vec); + } +}; + +typedef SkPoint3 SkVector3; +typedef SkPoint3 SkColor3f; + +#endif diff --git a/gfx/skia/skia/include/core/SkPromiseImageTexture.h b/gfx/skia/skia/include/core/SkPromiseImageTexture.h new file mode 100644 index 0000000000..0bd4034fdc --- /dev/null +++ b/gfx/skia/skia/include/core/SkPromiseImageTexture.h @@ -0,0 +1,46 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPromiseImageTexture_DEFINED +#define SkPromiseImageTexture_DEFINED + +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) +#include "include/core/SkRefCnt.h" +#include "include/gpu/GrBackendSurface.h" +/** + * This type is used to fulfill textures for PromiseImages. Once an instance is returned from a + * PromiseImageTextureFulfillProc the GrBackendTexture it wraps must remain valid until the + * corresponding PromiseImageTextureReleaseProc is called. + */ +class SK_API SkPromiseImageTexture : public SkNVRefCnt { +public: + SkPromiseImageTexture() = delete; + SkPromiseImageTexture(const SkPromiseImageTexture&) = delete; + SkPromiseImageTexture(SkPromiseImageTexture&&) = delete; + ~SkPromiseImageTexture(); + SkPromiseImageTexture& operator=(const SkPromiseImageTexture&) = delete; + SkPromiseImageTexture& operator=(SkPromiseImageTexture&&) = delete; + + static sk_sp Make(const GrBackendTexture& backendTexture) { + if (!backendTexture.isValid()) { + return nullptr; + } + return sk_sp(new SkPromiseImageTexture(backendTexture)); + } + + GrBackendTexture backendTexture() const { return fBackendTexture; } + +private: + explicit SkPromiseImageTexture(const GrBackendTexture& backendTexture); + + GrBackendTexture fBackendTexture; +}; +#endif // defined(SK_GANESH) + +#endif // SkPromiseImageTexture_DEFINED diff --git a/gfx/skia/skia/include/core/SkRRect.h b/gfx/skia/skia/include/core/SkRRect.h new file mode 100644 index 0000000000..73bc4a95b9 --- /dev/null +++ b/gfx/skia/skia/include/core/SkRRect.h @@ -0,0 +1,516 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRRect_DEFINED +#define SkRRect_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +#include +#include + +class SkMatrix; +class SkString; + +/** \class SkRRect + SkRRect describes a rounded rectangle with a bounds and a pair of radii for each corner. + The bounds and radii can be set so that SkRRect describes: a rectangle with sharp corners; + a circle; an oval; or a rectangle with one or more rounded corners. + + SkRRect allows implementing CSS properties that describe rounded corners. + SkRRect may have up to eight different radii, one for each axis on each of its four + corners. + + SkRRect may modify the provided parameters when initializing bounds and radii. + If either axis radii is zero or less: radii are stored as zero; corner is square. + If corner curves overlap, radii are proportionally reduced to fit within bounds. +*/ +class SK_API SkRRect { +public: + + /** Initializes bounds at (0, 0), the origin, with zero width and height. + Initializes corner radii to (0, 0), and sets type of kEmpty_Type. + + @return empty SkRRect + */ + SkRRect() = default; + + /** Initializes to copy of rrect bounds and corner radii. + + @param rrect bounds and corner to copy + @return copy of rrect + */ + SkRRect(const SkRRect& rrect) = default; + + /** Copies rrect bounds and corner radii. + + @param rrect bounds and corner to copy + @return copy of rrect + */ + SkRRect& operator=(const SkRRect& rrect) = default; + + /** \enum SkRRect::Type + Type describes possible specializations of SkRRect. Each Type is + exclusive; a SkRRect may only have one type. + + Type members become progressively less restrictive; larger values of + Type have more degrees of freedom than smaller values. + */ + enum Type { + kEmpty_Type, //!< zero width or height + kRect_Type, //!< non-zero width and height, and zeroed radii + kOval_Type, //!< non-zero width and height filled with radii + kSimple_Type, //!< non-zero width and height with equal radii + kNinePatch_Type, //!< non-zero width and height with axis-aligned radii + kComplex_Type, //!< non-zero width and height with arbitrary radii + kLastType = kComplex_Type, //!< largest Type value + }; + + Type getType() const { + SkASSERT(this->isValid()); + return static_cast(fType); + } + + Type type() const { return this->getType(); } + + inline bool isEmpty() const { return kEmpty_Type == this->getType(); } + inline bool isRect() const { return kRect_Type == this->getType(); } + inline bool isOval() const { return kOval_Type == this->getType(); } + inline bool isSimple() const { return kSimple_Type == this->getType(); } + inline bool isNinePatch() const { return kNinePatch_Type == this->getType(); } + inline bool isComplex() const { return kComplex_Type == this->getType(); } + + /** Returns span on the x-axis. This does not check if result fits in 32-bit float; + result may be infinity. + + @return rect().fRight minus rect().fLeft + */ + SkScalar width() const { return fRect.width(); } + + /** Returns span on the y-axis. This does not check if result fits in 32-bit float; + result may be infinity. + + @return rect().fBottom minus rect().fTop + */ + SkScalar height() const { return fRect.height(); } + + /** Returns top-left corner radii. If type() returns kEmpty_Type, kRect_Type, + kOval_Type, or kSimple_Type, returns a value representative of all corner radii. + If type() returns kNinePatch_Type or kComplex_Type, at least one of the + remaining three corners has a different value. + + @return corner radii for simple types + */ + SkVector getSimpleRadii() const { + return fRadii[0]; + } + + /** Sets bounds to zero width and height at (0, 0), the origin. Sets + corner radii to zero and sets type to kEmpty_Type. + */ + void setEmpty() { *this = SkRRect(); } + + /** Sets bounds to sorted rect, and sets corner radii to zero. + If set bounds has width and height, and sets type to kRect_Type; + otherwise, sets type to kEmpty_Type. + + @param rect bounds to set + */ + void setRect(const SkRect& rect) { + if (!this->initializeRect(rect)) { + return; + } + + memset(fRadii, 0, sizeof(fRadii)); + fType = kRect_Type; + + SkASSERT(this->isValid()); + } + + /** Initializes bounds at (0, 0), the origin, with zero width and height. + Initializes corner radii to (0, 0), and sets type of kEmpty_Type. + + @return empty SkRRect + */ + static SkRRect MakeEmpty() { return SkRRect(); } + + /** Initializes to copy of r bounds and zeroes corner radii. + + @param r bounds to copy + @return copy of r + */ + static SkRRect MakeRect(const SkRect& r) { + SkRRect rr; + rr.setRect(r); + return rr; + } + + /** Sets bounds to oval, x-axis radii to half oval.width(), and all y-axis radii + to half oval.height(). If oval bounds is empty, sets to kEmpty_Type. + Otherwise, sets to kOval_Type. + + @param oval bounds of oval + @return oval + */ + static SkRRect MakeOval(const SkRect& oval) { + SkRRect rr; + rr.setOval(oval); + return rr; + } + + /** Sets to rounded rectangle with the same radii for all four corners. + If rect is empty, sets to kEmpty_Type. + Otherwise, if xRad and yRad are zero, sets to kRect_Type. + Otherwise, if xRad is at least half rect.width() and yRad is at least half + rect.height(), sets to kOval_Type. + Otherwise, sets to kSimple_Type. + + @param rect bounds of rounded rectangle + @param xRad x-axis radius of corners + @param yRad y-axis radius of corners + @return rounded rectangle + */ + static SkRRect MakeRectXY(const SkRect& rect, SkScalar xRad, SkScalar yRad) { + SkRRect rr; + rr.setRectXY(rect, xRad, yRad); + return rr; + } + + /** Sets bounds to oval, x-axis radii to half oval.width(), and all y-axis radii + to half oval.height(). If oval bounds is empty, sets to kEmpty_Type. + Otherwise, sets to kOval_Type. + + @param oval bounds of oval + */ + void setOval(const SkRect& oval); + + /** Sets to rounded rectangle with the same radii for all four corners. + If rect is empty, sets to kEmpty_Type. + Otherwise, if xRad or yRad is zero, sets to kRect_Type. + Otherwise, if xRad is at least half rect.width() and yRad is at least half + rect.height(), sets to kOval_Type. + Otherwise, sets to kSimple_Type. + + @param rect bounds of rounded rectangle + @param xRad x-axis radius of corners + @param yRad y-axis radius of corners + + example: https://fiddle.skia.org/c/@RRect_setRectXY + */ + void setRectXY(const SkRect& rect, SkScalar xRad, SkScalar yRad); + + /** Sets bounds to rect. Sets radii to (leftRad, topRad), (rightRad, topRad), + (rightRad, bottomRad), (leftRad, bottomRad). + + If rect is empty, sets to kEmpty_Type. + Otherwise, if leftRad and rightRad are zero, sets to kRect_Type. + Otherwise, if topRad and bottomRad are zero, sets to kRect_Type. + Otherwise, if leftRad and rightRad are equal and at least half rect.width(), and + topRad and bottomRad are equal at least half rect.height(), sets to kOval_Type. + Otherwise, if leftRad and rightRad are equal, and topRad and bottomRad are equal, + sets to kSimple_Type. Otherwise, sets to kNinePatch_Type. + + Nine patch refers to the nine parts defined by the radii: one center rectangle, + four edge patches, and four corner patches. + + @param rect bounds of rounded rectangle + @param leftRad left-top and left-bottom x-axis radius + @param topRad left-top and right-top y-axis radius + @param rightRad right-top and right-bottom x-axis radius + @param bottomRad left-bottom and right-bottom y-axis radius + */ + void setNinePatch(const SkRect& rect, SkScalar leftRad, SkScalar topRad, + SkScalar rightRad, SkScalar bottomRad); + + /** Sets bounds to rect. Sets radii array for individual control of all for corners. + + If rect is empty, sets to kEmpty_Type. + Otherwise, if one of each corner radii are zero, sets to kRect_Type. + Otherwise, if all x-axis radii are equal and at least half rect.width(), and + all y-axis radii are equal at least half rect.height(), sets to kOval_Type. + Otherwise, if all x-axis radii are equal, and all y-axis radii are equal, + sets to kSimple_Type. Otherwise, sets to kNinePatch_Type. + + @param rect bounds of rounded rectangle + @param radii corner x-axis and y-axis radii + + example: https://fiddle.skia.org/c/@RRect_setRectRadii + */ + void setRectRadii(const SkRect& rect, const SkVector radii[4]); + + /** \enum SkRRect::Corner + The radii are stored: top-left, top-right, bottom-right, bottom-left. + */ + enum Corner { + kUpperLeft_Corner, //!< index of top-left corner radii + kUpperRight_Corner, //!< index of top-right corner radii + kLowerRight_Corner, //!< index of bottom-right corner radii + kLowerLeft_Corner, //!< index of bottom-left corner radii + }; + + /** Returns bounds. Bounds may have zero width or zero height. Bounds right is + greater than or equal to left; bounds bottom is greater than or equal to top. + Result is identical to getBounds(). + + @return bounding box + */ + const SkRect& rect() const { return fRect; } + + /** Returns scalar pair for radius of curve on x-axis and y-axis for one corner. + Both radii may be zero. If not zero, both are positive and finite. + + @return x-axis and y-axis radii for one corner + */ + SkVector radii(Corner corner) const { return fRadii[corner]; } + + /** Returns bounds. Bounds may have zero width or zero height. Bounds right is + greater than or equal to left; bounds bottom is greater than or equal to top. + Result is identical to rect(). + + @return bounding box + */ + const SkRect& getBounds() const { return fRect; } + + /** Returns true if bounds and radii in a are equal to bounds and radii in b. + + a and b are not equal if either contain NaN. a and b are equal if members + contain zeroes with different signs. + + @param a SkRect bounds and radii to compare + @param b SkRect bounds and radii to compare + @return true if members are equal + */ + friend bool operator==(const SkRRect& a, const SkRRect& b) { + return a.fRect == b.fRect && SkScalarsEqual(&a.fRadii[0].fX, &b.fRadii[0].fX, 8); + } + + /** Returns true if bounds and radii in a are not equal to bounds and radii in b. + + a and b are not equal if either contain NaN. a and b are equal if members + contain zeroes with different signs. + + @param a SkRect bounds and radii to compare + @param b SkRect bounds and radii to compare + @return true if members are not equal + */ + friend bool operator!=(const SkRRect& a, const SkRRect& b) { + return a.fRect != b.fRect || !SkScalarsEqual(&a.fRadii[0].fX, &b.fRadii[0].fX, 8); + } + + /** Copies SkRRect to dst, then insets dst bounds by dx and dy, and adjusts dst + radii by dx and dy. dx and dy may be positive, negative, or zero. dst may be + SkRRect. + + If either corner radius is zero, the corner has no curvature and is unchanged. + Otherwise, if adjusted radius becomes negative, pins radius to zero. + If dx exceeds half dst bounds width, dst bounds left and right are set to + bounds x-axis center. If dy exceeds half dst bounds height, dst bounds top and + bottom are set to bounds y-axis center. + + If dx or dy cause the bounds to become infinite, dst bounds is zeroed. + + @param dx added to rect().fLeft, and subtracted from rect().fRight + @param dy added to rect().fTop, and subtracted from rect().fBottom + @param dst insets bounds and radii + + example: https://fiddle.skia.org/c/@RRect_inset + */ + void inset(SkScalar dx, SkScalar dy, SkRRect* dst) const; + + /** Insets bounds by dx and dy, and adjusts radii by dx and dy. dx and dy may be + positive, negative, or zero. + + If either corner radius is zero, the corner has no curvature and is unchanged. + Otherwise, if adjusted radius becomes negative, pins radius to zero. + If dx exceeds half bounds width, bounds left and right are set to + bounds x-axis center. If dy exceeds half bounds height, bounds top and + bottom are set to bounds y-axis center. + + If dx or dy cause the bounds to become infinite, bounds is zeroed. + + @param dx added to rect().fLeft, and subtracted from rect().fRight + @param dy added to rect().fTop, and subtracted from rect().fBottom + */ + void inset(SkScalar dx, SkScalar dy) { + this->inset(dx, dy, this); + } + + /** Outsets dst bounds by dx and dy, and adjusts radii by dx and dy. dx and dy may be + positive, negative, or zero. + + If either corner radius is zero, the corner has no curvature and is unchanged. + Otherwise, if adjusted radius becomes negative, pins radius to zero. + If dx exceeds half dst bounds width, dst bounds left and right are set to + bounds x-axis center. If dy exceeds half dst bounds height, dst bounds top and + bottom are set to bounds y-axis center. + + If dx or dy cause the bounds to become infinite, dst bounds is zeroed. + + @param dx subtracted from rect().fLeft, and added to rect().fRight + @param dy subtracted from rect().fTop, and added to rect().fBottom + @param dst outset bounds and radii + */ + void outset(SkScalar dx, SkScalar dy, SkRRect* dst) const { + this->inset(-dx, -dy, dst); + } + + /** Outsets bounds by dx and dy, and adjusts radii by dx and dy. dx and dy may be + positive, negative, or zero. + + If either corner radius is zero, the corner has no curvature and is unchanged. + Otherwise, if adjusted radius becomes negative, pins radius to zero. + If dx exceeds half bounds width, bounds left and right are set to + bounds x-axis center. If dy exceeds half bounds height, bounds top and + bottom are set to bounds y-axis center. + + If dx or dy cause the bounds to become infinite, bounds is zeroed. + + @param dx subtracted from rect().fLeft, and added to rect().fRight + @param dy subtracted from rect().fTop, and added to rect().fBottom + */ + void outset(SkScalar dx, SkScalar dy) { + this->inset(-dx, -dy, this); + } + + /** Translates SkRRect by (dx, dy). + + @param dx offset added to rect().fLeft and rect().fRight + @param dy offset added to rect().fTop and rect().fBottom + */ + void offset(SkScalar dx, SkScalar dy) { + fRect.offset(dx, dy); + } + + /** Returns SkRRect translated by (dx, dy). + + @param dx offset added to rect().fLeft and rect().fRight + @param dy offset added to rect().fTop and rect().fBottom + @return SkRRect bounds offset by (dx, dy), with unchanged corner radii + */ + SkRRect SK_WARN_UNUSED_RESULT makeOffset(SkScalar dx, SkScalar dy) const { + return SkRRect(fRect.makeOffset(dx, dy), fRadii, fType); + } + + /** Returns true if rect is inside the bounds and corner radii, and if + SkRRect and rect are not empty. + + @param rect area tested for containment + @return true if SkRRect contains rect + + example: https://fiddle.skia.org/c/@RRect_contains + */ + bool contains(const SkRect& rect) const; + + /** Returns true if bounds and radii values are finite and describe a SkRRect + SkRRect::Type that matches getType(). All SkRRect methods construct valid types, + even if the input values are not valid. Invalid SkRRect data can only + be generated by corrupting memory. + + @return true if bounds and radii match type() + + example: https://fiddle.skia.org/c/@RRect_isValid + */ + bool isValid() const; + + static constexpr size_t kSizeInMemory = 12 * sizeof(SkScalar); + + /** Writes SkRRect to buffer. Writes kSizeInMemory bytes, and returns + kSizeInMemory, the number of bytes written. + + @param buffer storage for SkRRect + @return bytes written, kSizeInMemory + + example: https://fiddle.skia.org/c/@RRect_writeToMemory + */ + size_t writeToMemory(void* buffer) const; + + /** Reads SkRRect from buffer, reading kSizeInMemory bytes. + Returns kSizeInMemory, bytes read if length is at least kSizeInMemory. + Otherwise, returns zero. + + @param buffer memory to read from + @param length size of buffer + @return bytes read, or 0 if length is less than kSizeInMemory + + example: https://fiddle.skia.org/c/@RRect_readFromMemory + */ + size_t readFromMemory(const void* buffer, size_t length); + + /** Transforms by SkRRect by matrix, storing result in dst. + Returns true if SkRRect transformed can be represented by another SkRRect. + Returns false if matrix contains transformations that are not axis aligned. + + Asserts in debug builds if SkRRect equals dst. + + @param matrix SkMatrix specifying the transform + @param dst SkRRect to store the result + @return true if transformation succeeded. + + example: https://fiddle.skia.org/c/@RRect_transform + */ + bool transform(const SkMatrix& matrix, SkRRect* dst) const; + + /** Writes text representation of SkRRect to standard output. + Set asHex true to generate exact binary representations + of floating point numbers. + + @param asHex true if SkScalar values are written as hexadecimal + + example: https://fiddle.skia.org/c/@RRect_dump + */ + void dump(bool asHex) const; + SkString dumpToString(bool asHex) const; + + /** Writes text representation of SkRRect to standard output. The representation + may be directly compiled as C++ code. Floating point values are written + with limited precision; it may not be possible to reconstruct original + SkRRect from output. + */ + void dump() const { this->dump(false); } + + /** Writes text representation of SkRRect to standard output. The representation + may be directly compiled as C++ code. Floating point values are written + in hexadecimal to preserve their exact bit pattern. The output reconstructs the + original SkRRect. + */ + void dumpHex() const { this->dump(true); } + +private: + static bool AreRectAndRadiiValid(const SkRect&, const SkVector[4]); + + SkRRect(const SkRect& rect, const SkVector radii[4], int32_t type) + : fRect(rect) + , fRadii{radii[0], radii[1], radii[2], radii[3]} + , fType(type) {} + + /** + * Initializes fRect. If the passed in rect is not finite or empty the rrect will be fully + * initialized and false is returned. Otherwise, just fRect is initialized and true is returned. + */ + bool initializeRect(const SkRect&); + + void computeType(); + bool checkCornerContainment(SkScalar x, SkScalar y) const; + // Returns true if the radii had to be scaled to fit rect + bool scaleRadii(); + + SkRect fRect = SkRect::MakeEmpty(); + // Radii order is UL, UR, LR, LL. Use Corner enum to index into fRadii[] + SkVector fRadii[4] = {{0, 0}, {0, 0}, {0,0}, {0,0}}; + // use an explicitly sized type so we're sure the class is dense (no uninitialized bytes) + int32_t fType = kEmpty_Type; + // TODO: add padding so we can use memcpy for flattening and not copy uninitialized data + + // to access fRadii directly + friend class SkPath; + friend class SkRRectPriv; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkRSXform.h b/gfx/skia/skia/include/core/SkRSXform.h new file mode 100644 index 0000000000..5fcfff2922 --- /dev/null +++ b/gfx/skia/skia/include/core/SkRSXform.h @@ -0,0 +1,69 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRSXform_DEFINED +#define SkRSXform_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkSize.h" + +/** + * A compressed form of a rotation+scale matrix. + * + * [ fSCos -fSSin fTx ] + * [ fSSin fSCos fTy ] + * [ 0 0 1 ] + */ +struct SK_API SkRSXform { + static SkRSXform Make(SkScalar scos, SkScalar ssin, SkScalar tx, SkScalar ty) { + SkRSXform xform = { scos, ssin, tx, ty }; + return xform; + } + + /* + * Initialize a new xform based on the scale, rotation (in radians), final tx,ty location + * and anchor-point ax,ay within the src quad. + * + * Note: the anchor point is not normalized (e.g. 0...1) but is in pixels of the src image. + */ + static SkRSXform MakeFromRadians(SkScalar scale, SkScalar radians, SkScalar tx, SkScalar ty, + SkScalar ax, SkScalar ay) { + const SkScalar s = SkScalarSin(radians) * scale; + const SkScalar c = SkScalarCos(radians) * scale; + return Make(c, s, tx + -c * ax + s * ay, ty + -s * ax - c * ay); + } + + SkScalar fSCos; + SkScalar fSSin; + SkScalar fTx; + SkScalar fTy; + + bool rectStaysRect() const { + return 0 == fSCos || 0 == fSSin; + } + + void setIdentity() { + fSCos = 1; + fSSin = fTx = fTy = 0; + } + + void set(SkScalar scos, SkScalar ssin, SkScalar tx, SkScalar ty) { + fSCos = scos; + fSSin = ssin; + fTx = tx; + fTy = ty; + } + + void toQuad(SkScalar width, SkScalar height, SkPoint quad[4]) const; + void toQuad(const SkSize& size, SkPoint quad[4]) const { + this->toQuad(size.width(), size.height(), quad); + } + void toTriStrip(SkScalar width, SkScalar height, SkPoint strip[4]) const; +}; + +#endif + diff --git a/gfx/skia/skia/include/core/SkRasterHandleAllocator.h b/gfx/skia/skia/include/core/SkRasterHandleAllocator.h new file mode 100644 index 0000000000..6fe121a6de --- /dev/null +++ b/gfx/skia/skia/include/core/SkRasterHandleAllocator.h @@ -0,0 +1,94 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRasterHandleAllocator_DEFINED +#define SkRasterHandleAllocator_DEFINED + +#include "include/core/SkImageInfo.h" + +class SkBitmap; +class SkCanvas; +class SkMatrix; +class SkSurfaceProps; + +/** + * If a client wants to control the allocation of raster layers in a canvas, it should subclass + * SkRasterHandleAllocator. This allocator performs two tasks: + * 1. controls how the memory for the pixels is allocated + * 2. associates a "handle" to a private object that can track the matrix/clip of the SkCanvas + * + * This example allocates a canvas, and defers to the allocator to create the base layer. + * + * std::unique_ptr canvas = SkRasterHandleAllocator::MakeCanvas( + * SkImageInfo::Make(...), + * std::make_unique(...), + * nullptr); + * + * If you have already allocated the base layer (and its handle, release-proc etc.) then you + * can pass those in using the last parameter to MakeCanvas(). + * + * Regardless of how the base layer is allocated, each time canvas->saveLayer() is called, + * your allocator's allocHandle() will be called. + */ +class SK_API SkRasterHandleAllocator { +public: + virtual ~SkRasterHandleAllocator() = default; + + // The value that is returned to clients of the canvas that has this allocator installed. + typedef void* Handle; + + struct Rec { + // When the allocation goes out of scope, this proc is called to free everything associated + // with it: the pixels, the "handle", etc. This is passed the pixel address and fReleaseCtx. + void (*fReleaseProc)(void* pixels, void* ctx); + void* fReleaseCtx; // context passed to fReleaseProc + void* fPixels; // pixels for this allocation + size_t fRowBytes; // rowbytes for these pixels + Handle fHandle; // public handle returned by SkCanvas::accessTopRasterHandle() + }; + + /** + * Given a requested info, allocate the corresponding pixels/rowbytes, and whatever handle + * is desired to give clients access to those pixels. The rec also contains a proc and context + * which will be called when this allocation goes out of scope. + * + * e.g. + * when canvas->saveLayer() is called, the allocator will be called to allocate the pixels + * for the layer. When canvas->restore() is called, the fReleaseProc will be called. + */ + virtual bool allocHandle(const SkImageInfo&, Rec*) = 0; + + /** + * Clients access the handle for a given layer by calling SkCanvas::accessTopRasterHandle(). + * To allow the handle to reflect the current matrix/clip in the canvs, updateHandle() is + * is called. The subclass is responsible to update the handle as it sees fit. + */ + virtual void updateHandle(Handle, const SkMatrix&, const SkIRect&) = 0; + + /** + * This creates a canvas which will use the allocator to manage pixel allocations, including + * all calls to saveLayer(). + * + * If rec is non-null, then it will be used as the base-layer of pixels/handle. + * If rec is null, then the allocator will be called for the base-layer as well. + */ + static std::unique_ptr MakeCanvas(std::unique_ptr, + const SkImageInfo&, const Rec* rec = nullptr, + const SkSurfaceProps* props = nullptr); + +protected: + SkRasterHandleAllocator() = default; + SkRasterHandleAllocator(const SkRasterHandleAllocator&) = delete; + SkRasterHandleAllocator& operator=(const SkRasterHandleAllocator&) = delete; + +private: + friend class SkBitmapDevice; + + Handle allocBitmap(const SkImageInfo&, SkBitmap*); +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkRect.h b/gfx/skia/skia/include/core/SkRect.h new file mode 100644 index 0000000000..1ed7823c23 --- /dev/null +++ b/gfx/skia/skia/include/core/SkRect.h @@ -0,0 +1,1388 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRect_DEFINED +#define SkRect_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkSafe32.h" +#include "include/private/base/SkTFitsIn.h" + +#include +#include +#include + +struct SkRect; + +/** \struct SkIRect + SkIRect holds four 32-bit integer coordinates describing the upper and + lower bounds of a rectangle. SkIRect may be created from outer bounds or + from position, width, and height. SkIRect describes an area; if its right + is less than or equal to its left, or if its bottom is less than or equal to + its top, it is considered empty. +*/ +struct SK_API SkIRect { + int32_t fLeft; //!< smaller x-axis bounds + int32_t fTop; //!< smaller y-axis bounds + int32_t fRight; //!< larger x-axis bounds + int32_t fBottom; //!< larger y-axis bounds + + /** Returns constructed SkIRect set to (0, 0, 0, 0). + Many other rectangles are empty; if left is equal to or greater than right, + or if top is equal to or greater than bottom. Setting all members to zero + is a convenience, but does not designate a special empty rectangle. + + @return bounds (0, 0, 0, 0) + */ + static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeEmpty() { + return SkIRect{0, 0, 0, 0}; + } + + /** Returns constructed SkIRect set to (0, 0, w, h). Does not validate input; w or h + may be negative. + + @param w width of constructed SkIRect + @param h height of constructed SkIRect + @return bounds (0, 0, w, h) + */ + static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeWH(int32_t w, int32_t h) { + return SkIRect{0, 0, w, h}; + } + + /** Returns constructed SkIRect set to (0, 0, size.width(), size.height()). + Does not validate input; size.width() or size.height() may be negative. + + @param size values for SkIRect width and height + @return bounds (0, 0, size.width(), size.height()) + */ + static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeSize(const SkISize& size) { + return SkIRect{0, 0, size.fWidth, size.fHeight}; + } + + /** Returns constructed SkIRect set to (pt.x(), pt.y(), pt.x() + size.width(), + pt.y() + size.height()). Does not validate input; size.width() or size.height() may be + negative. + + @param pt values for SkIRect fLeft and fTop + @param size values for SkIRect width and height + @return bounds at pt with width and height of size + */ + static constexpr SkIRect SK_WARN_UNUSED_RESULT MakePtSize(SkIPoint pt, SkISize size) { + return MakeXYWH(pt.x(), pt.y(), size.width(), size.height()); + } + + /** Returns constructed SkIRect set to (l, t, r, b). Does not sort input; SkIRect may + result in fLeft greater than fRight, or fTop greater than fBottom. + + @param l integer stored in fLeft + @param t integer stored in fTop + @param r integer stored in fRight + @param b integer stored in fBottom + @return bounds (l, t, r, b) + */ + static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeLTRB(int32_t l, int32_t t, + int32_t r, int32_t b) { + return SkIRect{l, t, r, b}; + } + + /** Returns constructed SkIRect set to: (x, y, x + w, y + h). + Does not validate input; w or h may be negative. + + @param x stored in fLeft + @param y stored in fTop + @param w added to x and stored in fRight + @param h added to y and stored in fBottom + @return bounds at (x, y) with width w and height h + */ + static constexpr SkIRect SK_WARN_UNUSED_RESULT MakeXYWH(int32_t x, int32_t y, + int32_t w, int32_t h) { + return { x, y, Sk32_sat_add(x, w), Sk32_sat_add(y, h) }; + } + + /** Returns left edge of SkIRect, if sorted. + Call sort() to reverse fLeft and fRight if needed. + + @return fLeft + */ + constexpr int32_t left() const { return fLeft; } + + /** Returns top edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid, + and sort() to reverse fTop and fBottom if needed. + + @return fTop + */ + constexpr int32_t top() const { return fTop; } + + /** Returns right edge of SkIRect, if sorted. + Call sort() to reverse fLeft and fRight if needed. + + @return fRight + */ + constexpr int32_t right() const { return fRight; } + + /** Returns bottom edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid, + and sort() to reverse fTop and fBottom if needed. + + @return fBottom + */ + constexpr int32_t bottom() const { return fBottom; } + + /** Returns left edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid, + and sort() to reverse fLeft and fRight if needed. + + @return fLeft + */ + constexpr int32_t x() const { return fLeft; } + + /** Returns top edge of SkIRect, if sorted. Call isEmpty() to see if SkIRect may be invalid, + and sort() to reverse fTop and fBottom if needed. + + @return fTop + */ + constexpr int32_t y() const { return fTop; } + + // Experimental + constexpr SkIPoint topLeft() const { return {fLeft, fTop}; } + + /** Returns span on the x-axis. This does not check if SkIRect is sorted, or if + result fits in 32-bit signed integer; result may be negative. + + @return fRight minus fLeft + */ + constexpr int32_t width() const { return Sk32_can_overflow_sub(fRight, fLeft); } + + /** Returns span on the y-axis. This does not check if SkIRect is sorted, or if + result fits in 32-bit signed integer; result may be negative. + + @return fBottom minus fTop + */ + constexpr int32_t height() const { return Sk32_can_overflow_sub(fBottom, fTop); } + + /** Returns spans on the x-axis and y-axis. This does not check if SkIRect is sorted, + or if result fits in 32-bit signed integer; result may be negative. + + @return SkISize (width, height) + */ + constexpr SkISize size() const { return SkISize::Make(this->width(), this->height()); } + + /** Returns span on the x-axis. This does not check if SkIRect is sorted, so the + result may be negative. This is safer than calling width() since width() might + overflow in its calculation. + + @return fRight minus fLeft cast to int64_t + */ + constexpr int64_t width64() const { return (int64_t)fRight - (int64_t)fLeft; } + + /** Returns span on the y-axis. This does not check if SkIRect is sorted, so the + result may be negative. This is safer than calling height() since height() might + overflow in its calculation. + + @return fBottom minus fTop cast to int64_t + */ + constexpr int64_t height64() const { return (int64_t)fBottom - (int64_t)fTop; } + + /** Returns true if fLeft is equal to or greater than fRight, or if fTop is equal + to or greater than fBottom. Call sort() to reverse rectangles with negative + width64() or height64(). + + @return true if width64() or height64() are zero or negative + */ + bool isEmpty64() const { return fRight <= fLeft || fBottom <= fTop; } + + /** Returns true if width() or height() are zero or negative. + + @return true if width() or height() are zero or negative + */ + bool isEmpty() const { + int64_t w = this->width64(); + int64_t h = this->height64(); + if (w <= 0 || h <= 0) { + return true; + } + // Return true if either exceeds int32_t + return !SkTFitsIn(w | h); + } + + /** Returns true if all members in a: fLeft, fTop, fRight, and fBottom; are + identical to corresponding members in b. + + @param a SkIRect to compare + @param b SkIRect to compare + @return true if members are equal + */ + friend bool operator==(const SkIRect& a, const SkIRect& b) { + return a.fLeft == b.fLeft && a.fTop == b.fTop && + a.fRight == b.fRight && a.fBottom == b.fBottom; + } + + /** Returns true if any member in a: fLeft, fTop, fRight, and fBottom; is not + identical to the corresponding member in b. + + @param a SkIRect to compare + @param b SkIRect to compare + @return true if members are not equal + */ + friend bool operator!=(const SkIRect& a, const SkIRect& b) { + return a.fLeft != b.fLeft || a.fTop != b.fTop || + a.fRight != b.fRight || a.fBottom != b.fBottom; + } + + /** Sets SkIRect to (0, 0, 0, 0). + + Many other rectangles are empty; if left is equal to or greater than right, + or if top is equal to or greater than bottom. Setting all members to zero + is a convenience, but does not designate a special empty rectangle. + */ + void setEmpty() { memset(this, 0, sizeof(*this)); } + + /** Sets SkIRect to (left, top, right, bottom). + left and right are not sorted; left is not necessarily less than right. + top and bottom are not sorted; top is not necessarily less than bottom. + + @param left stored in fLeft + @param top stored in fTop + @param right stored in fRight + @param bottom stored in fBottom + */ + void setLTRB(int32_t left, int32_t top, int32_t right, int32_t bottom) { + fLeft = left; + fTop = top; + fRight = right; + fBottom = bottom; + } + + /** Sets SkIRect to: (x, y, x + width, y + height). + Does not validate input; width or height may be negative. + + @param x stored in fLeft + @param y stored in fTop + @param width added to x and stored in fRight + @param height added to y and stored in fBottom + */ + void setXYWH(int32_t x, int32_t y, int32_t width, int32_t height) { + fLeft = x; + fTop = y; + fRight = Sk32_sat_add(x, width); + fBottom = Sk32_sat_add(y, height); + } + + void setWH(int32_t width, int32_t height) { + fLeft = 0; + fTop = 0; + fRight = width; + fBottom = height; + } + + void setSize(SkISize size) { + fLeft = 0; + fTop = 0; + fRight = size.width(); + fBottom = size.height(); + } + + /** Returns SkIRect offset by (dx, dy). + + If dx is negative, SkIRect returned is moved to the left. + If dx is positive, SkIRect returned is moved to the right. + If dy is negative, SkIRect returned is moved upward. + If dy is positive, SkIRect returned is moved downward. + + @param dx offset added to fLeft and fRight + @param dy offset added to fTop and fBottom + @return SkIRect offset by dx and dy, with original width and height + */ + constexpr SkIRect makeOffset(int32_t dx, int32_t dy) const { + return { + Sk32_sat_add(fLeft, dx), Sk32_sat_add(fTop, dy), + Sk32_sat_add(fRight, dx), Sk32_sat_add(fBottom, dy), + }; + } + + /** Returns SkIRect offset by (offset.x(), offset.y()). + + If offset.x() is negative, SkIRect returned is moved to the left. + If offset.x() is positive, SkIRect returned is moved to the right. + If offset.y() is negative, SkIRect returned is moved upward. + If offset.y() is positive, SkIRect returned is moved downward. + + @param offset translation vector + @return SkIRect translated by offset, with original width and height + */ + constexpr SkIRect makeOffset(SkIVector offset) const { + return this->makeOffset(offset.x(), offset.y()); + } + + /** Returns SkIRect, inset by (dx, dy). + + If dx is negative, SkIRect returned is wider. + If dx is positive, SkIRect returned is narrower. + If dy is negative, SkIRect returned is taller. + If dy is positive, SkIRect returned is shorter. + + @param dx offset added to fLeft and subtracted from fRight + @param dy offset added to fTop and subtracted from fBottom + @return SkIRect inset symmetrically left and right, top and bottom + */ + SkIRect makeInset(int32_t dx, int32_t dy) const { + return { + Sk32_sat_add(fLeft, dx), Sk32_sat_add(fTop, dy), + Sk32_sat_sub(fRight, dx), Sk32_sat_sub(fBottom, dy), + }; + } + + /** Returns SkIRect, outset by (dx, dy). + + If dx is negative, SkIRect returned is narrower. + If dx is positive, SkIRect returned is wider. + If dy is negative, SkIRect returned is shorter. + If dy is positive, SkIRect returned is taller. + + @param dx offset subtracted to fLeft and added from fRight + @param dy offset subtracted to fTop and added from fBottom + @return SkIRect outset symmetrically left and right, top and bottom + */ + SkIRect makeOutset(int32_t dx, int32_t dy) const { + return { + Sk32_sat_sub(fLeft, dx), Sk32_sat_sub(fTop, dy), + Sk32_sat_add(fRight, dx), Sk32_sat_add(fBottom, dy), + }; + } + + /** Offsets SkIRect by adding dx to fLeft, fRight; and by adding dy to fTop, fBottom. + + If dx is negative, moves SkIRect returned to the left. + If dx is positive, moves SkIRect returned to the right. + If dy is negative, moves SkIRect returned upward. + If dy is positive, moves SkIRect returned downward. + + @param dx offset added to fLeft and fRight + @param dy offset added to fTop and fBottom + */ + void offset(int32_t dx, int32_t dy) { + fLeft = Sk32_sat_add(fLeft, dx); + fTop = Sk32_sat_add(fTop, dy); + fRight = Sk32_sat_add(fRight, dx); + fBottom = Sk32_sat_add(fBottom, dy); + } + + /** Offsets SkIRect by adding delta.fX to fLeft, fRight; and by adding delta.fY to + fTop, fBottom. + + If delta.fX is negative, moves SkIRect returned to the left. + If delta.fX is positive, moves SkIRect returned to the right. + If delta.fY is negative, moves SkIRect returned upward. + If delta.fY is positive, moves SkIRect returned downward. + + @param delta offset added to SkIRect + */ + void offset(const SkIPoint& delta) { + this->offset(delta.fX, delta.fY); + } + + /** Offsets SkIRect so that fLeft equals newX, and fTop equals newY. width and height + are unchanged. + + @param newX stored in fLeft, preserving width() + @param newY stored in fTop, preserving height() + */ + void offsetTo(int32_t newX, int32_t newY) { + fRight = Sk64_pin_to_s32((int64_t)fRight + newX - fLeft); + fBottom = Sk64_pin_to_s32((int64_t)fBottom + newY - fTop); + fLeft = newX; + fTop = newY; + } + + /** Insets SkIRect by (dx,dy). + + If dx is positive, makes SkIRect narrower. + If dx is negative, makes SkIRect wider. + If dy is positive, makes SkIRect shorter. + If dy is negative, makes SkIRect taller. + + @param dx offset added to fLeft and subtracted from fRight + @param dy offset added to fTop and subtracted from fBottom + */ + void inset(int32_t dx, int32_t dy) { + fLeft = Sk32_sat_add(fLeft, dx); + fTop = Sk32_sat_add(fTop, dy); + fRight = Sk32_sat_sub(fRight, dx); + fBottom = Sk32_sat_sub(fBottom, dy); + } + + /** Outsets SkIRect by (dx, dy). + + If dx is positive, makes SkIRect wider. + If dx is negative, makes SkIRect narrower. + If dy is positive, makes SkIRect taller. + If dy is negative, makes SkIRect shorter. + + @param dx subtracted to fLeft and added from fRight + @param dy subtracted to fTop and added from fBottom + */ + void outset(int32_t dx, int32_t dy) { this->inset(-dx, -dy); } + + /** Adjusts SkIRect by adding dL to fLeft, dT to fTop, dR to fRight, and dB to fBottom. + + If dL is positive, narrows SkIRect on the left. If negative, widens it on the left. + If dT is positive, shrinks SkIRect on the top. If negative, lengthens it on the top. + If dR is positive, narrows SkIRect on the right. If negative, widens it on the right. + If dB is positive, shrinks SkIRect on the bottom. If negative, lengthens it on the bottom. + + The resulting SkIRect is not checked for validity. Thus, if the resulting SkIRect left is + greater than right, the SkIRect will be considered empty. Call sort() after this call + if that is not the desired behavior. + + @param dL offset added to fLeft + @param dT offset added to fTop + @param dR offset added to fRight + @param dB offset added to fBottom + */ + void adjust(int32_t dL, int32_t dT, int32_t dR, int32_t dB) { + fLeft = Sk32_sat_add(fLeft, dL); + fTop = Sk32_sat_add(fTop, dT); + fRight = Sk32_sat_add(fRight, dR); + fBottom = Sk32_sat_add(fBottom, dB); + } + + /** Returns true if: fLeft <= x < fRight && fTop <= y < fBottom. + Returns false if SkIRect is empty. + + Considers input to describe constructed SkIRect: (x, y, x + 1, y + 1) and + returns true if constructed area is completely enclosed by SkIRect area. + + @param x test SkIPoint x-coordinate + @param y test SkIPoint y-coordinate + @return true if (x, y) is inside SkIRect + */ + bool contains(int32_t x, int32_t y) const { + return x >= fLeft && x < fRight && y >= fTop && y < fBottom; + } + + /** Returns true if SkIRect contains r. + Returns false if SkIRect is empty or r is empty. + + SkIRect contains r when SkIRect area completely includes r area. + + @param r SkIRect contained + @return true if all sides of SkIRect are outside r + */ + bool contains(const SkIRect& r) const { + return !r.isEmpty() && !this->isEmpty() && // check for empties + fLeft <= r.fLeft && fTop <= r.fTop && + fRight >= r.fRight && fBottom >= r.fBottom; + } + + /** Returns true if SkIRect contains r. + Returns false if SkIRect is empty or r is empty. + + SkIRect contains r when SkIRect area completely includes r area. + + @param r SkRect contained + @return true if all sides of SkIRect are outside r + */ + inline bool contains(const SkRect& r) const; + + /** Returns true if SkIRect contains construction. + Asserts if SkIRect is empty or construction is empty, and if SK_DEBUG is defined. + + Return is undefined if SkIRect is empty or construction is empty. + + @param r SkIRect contained + @return true if all sides of SkIRect are outside r + */ + bool containsNoEmptyCheck(const SkIRect& r) const { + SkASSERT(fLeft < fRight && fTop < fBottom); + SkASSERT(r.fLeft < r.fRight && r.fTop < r.fBottom); + return fLeft <= r.fLeft && fTop <= r.fTop && fRight >= r.fRight && fBottom >= r.fBottom; + } + + /** Returns true if SkIRect intersects r, and sets SkIRect to intersection. + Returns false if SkIRect does not intersect r, and leaves SkIRect unchanged. + + Returns false if either r or SkIRect is empty, leaving SkIRect unchanged. + + @param r limit of result + @return true if r and SkIRect have area in common + */ + bool intersect(const SkIRect& r) { + return this->intersect(*this, r); + } + + /** Returns true if a intersects b, and sets SkIRect to intersection. + Returns false if a does not intersect b, and leaves SkIRect unchanged. + + Returns false if either a or b is empty, leaving SkIRect unchanged. + + @param a SkIRect to intersect + @param b SkIRect to intersect + @return true if a and b have area in common + */ + bool SK_WARN_UNUSED_RESULT intersect(const SkIRect& a, const SkIRect& b); + + /** Returns true if a intersects b. + Returns false if either a or b is empty, or do not intersect. + + @param a SkIRect to intersect + @param b SkIRect to intersect + @return true if a and b have area in common + */ + static bool Intersects(const SkIRect& a, const SkIRect& b) { + return SkIRect{}.intersect(a, b); + } + + /** Sets SkIRect to the union of itself and r. + + Has no effect if r is empty. Otherwise, if SkIRect is empty, sets SkIRect to r. + + @param r expansion SkIRect + + example: https://fiddle.skia.org/c/@IRect_join_2 + */ + void join(const SkIRect& r); + + /** Swaps fLeft and fRight if fLeft is greater than fRight; and swaps + fTop and fBottom if fTop is greater than fBottom. Result may be empty, + and width() and height() will be zero or positive. + */ + void sort() { + using std::swap; + if (fLeft > fRight) { + swap(fLeft, fRight); + } + if (fTop > fBottom) { + swap(fTop, fBottom); + } + } + + /** Returns SkIRect with fLeft and fRight swapped if fLeft is greater than fRight; and + with fTop and fBottom swapped if fTop is greater than fBottom. Result may be empty; + and width() and height() will be zero or positive. + + @return sorted SkIRect + */ + SkIRect makeSorted() const { + return MakeLTRB(std::min(fLeft, fRight), std::min(fTop, fBottom), + std::max(fLeft, fRight), std::max(fTop, fBottom)); + } +}; + +/** \struct SkRect + SkRect holds four SkScalar coordinates describing the upper and + lower bounds of a rectangle. SkRect may be created from outer bounds or + from position, width, and height. SkRect describes an area; if its right + is less than or equal to its left, or if its bottom is less than or equal to + its top, it is considered empty. +*/ +struct SK_API SkRect { + SkScalar fLeft; //!< smaller x-axis bounds + SkScalar fTop; //!< smaller y-axis bounds + SkScalar fRight; //!< larger x-axis bounds + SkScalar fBottom; //!< larger y-axis bounds + + /** Returns constructed SkRect set to (0, 0, 0, 0). + Many other rectangles are empty; if left is equal to or greater than right, + or if top is equal to or greater than bottom. Setting all members to zero + is a convenience, but does not designate a special empty rectangle. + + @return bounds (0, 0, 0, 0) + */ + static constexpr SkRect SK_WARN_UNUSED_RESULT MakeEmpty() { + return SkRect{0, 0, 0, 0}; + } + + /** Returns constructed SkRect set to SkScalar values (0, 0, w, h). Does not + validate input; w or h may be negative. + + Passing integer values may generate a compiler warning since SkRect cannot + represent 32-bit integers exactly. Use SkIRect for an exact integer rectangle. + + @param w SkScalar width of constructed SkRect + @param h SkScalar height of constructed SkRect + @return bounds (0, 0, w, h) + */ + static constexpr SkRect SK_WARN_UNUSED_RESULT MakeWH(SkScalar w, SkScalar h) { + return SkRect{0, 0, w, h}; + } + + /** Returns constructed SkRect set to integer values (0, 0, w, h). Does not validate + input; w or h may be negative. + + Use to avoid a compiler warning that input may lose precision when stored. + Use SkIRect for an exact integer rectangle. + + @param w integer width of constructed SkRect + @param h integer height of constructed SkRect + @return bounds (0, 0, w, h) + */ + static SkRect SK_WARN_UNUSED_RESULT MakeIWH(int w, int h) { + return {0, 0, SkIntToScalar(w), SkIntToScalar(h)}; + } + + /** Returns constructed SkRect set to (0, 0, size.width(), size.height()). Does not + validate input; size.width() or size.height() may be negative. + + @param size SkScalar values for SkRect width and height + @return bounds (0, 0, size.width(), size.height()) + */ + static constexpr SkRect SK_WARN_UNUSED_RESULT MakeSize(const SkSize& size) { + return SkRect{0, 0, size.fWidth, size.fHeight}; + } + + /** Returns constructed SkRect set to (l, t, r, b). Does not sort input; SkRect may + result in fLeft greater than fRight, or fTop greater than fBottom. + + @param l SkScalar stored in fLeft + @param t SkScalar stored in fTop + @param r SkScalar stored in fRight + @param b SkScalar stored in fBottom + @return bounds (l, t, r, b) + */ + static constexpr SkRect SK_WARN_UNUSED_RESULT MakeLTRB(SkScalar l, SkScalar t, SkScalar r, + SkScalar b) { + return SkRect {l, t, r, b}; + } + + /** Returns constructed SkRect set to (x, y, x + w, y + h). + Does not validate input; w or h may be negative. + + @param x stored in fLeft + @param y stored in fTop + @param w added to x and stored in fRight + @param h added to y and stored in fBottom + @return bounds at (x, y) with width w and height h + */ + static constexpr SkRect SK_WARN_UNUSED_RESULT MakeXYWH(SkScalar x, SkScalar y, SkScalar w, + SkScalar h) { + return SkRect {x, y, x + w, y + h}; + } + + /** Returns constructed SkIRect set to (0, 0, size.width(), size.height()). + Does not validate input; size.width() or size.height() may be negative. + + @param size integer values for SkRect width and height + @return bounds (0, 0, size.width(), size.height()) + */ + static SkRect Make(const SkISize& size) { + return MakeIWH(size.width(), size.height()); + } + + /** Returns constructed SkIRect set to irect, promoting integers to scalar. + Does not validate input; fLeft may be greater than fRight, fTop may be greater + than fBottom. + + @param irect integer unsorted bounds + @return irect members converted to SkScalar + */ + static SkRect SK_WARN_UNUSED_RESULT Make(const SkIRect& irect) { + return { + SkIntToScalar(irect.fLeft), SkIntToScalar(irect.fTop), + SkIntToScalar(irect.fRight), SkIntToScalar(irect.fBottom) + }; + } + + /** Returns true if fLeft is equal to or greater than fRight, or if fTop is equal + to or greater than fBottom. Call sort() to reverse rectangles with negative + width() or height(). + + @return true if width() or height() are zero or negative + */ + bool isEmpty() const { + // We write it as the NOT of a non-empty rect, so we will return true if any values + // are NaN. + return !(fLeft < fRight && fTop < fBottom); + } + + /** Returns true if fLeft is equal to or less than fRight, or if fTop is equal + to or less than fBottom. Call sort() to reverse rectangles with negative + width() or height(). + + @return true if width() or height() are zero or positive + */ + bool isSorted() const { return fLeft <= fRight && fTop <= fBottom; } + + /** Returns true if all values in the rectangle are finite: SK_ScalarMin or larger, + and SK_ScalarMax or smaller. + + @return true if no member is infinite or NaN + */ + bool isFinite() const { + float accum = 0; + accum *= fLeft; + accum *= fTop; + accum *= fRight; + accum *= fBottom; + + // accum is either NaN or it is finite (zero). + SkASSERT(0 == accum || SkScalarIsNaN(accum)); + + // value==value will be true iff value is not NaN + // TODO: is it faster to say !accum or accum==accum? + return !SkScalarIsNaN(accum); + } + + /** Returns left edge of SkRect, if sorted. Call isSorted() to see if SkRect is valid. + Call sort() to reverse fLeft and fRight if needed. + + @return fLeft + */ + constexpr SkScalar x() const { return fLeft; } + + /** Returns top edge of SkRect, if sorted. Call isEmpty() to see if SkRect may be invalid, + and sort() to reverse fTop and fBottom if needed. + + @return fTop + */ + constexpr SkScalar y() const { return fTop; } + + /** Returns left edge of SkRect, if sorted. Call isSorted() to see if SkRect is valid. + Call sort() to reverse fLeft and fRight if needed. + + @return fLeft + */ + constexpr SkScalar left() const { return fLeft; } + + /** Returns top edge of SkRect, if sorted. Call isEmpty() to see if SkRect may be invalid, + and sort() to reverse fTop and fBottom if needed. + + @return fTop + */ + constexpr SkScalar top() const { return fTop; } + + /** Returns right edge of SkRect, if sorted. Call isSorted() to see if SkRect is valid. + Call sort() to reverse fLeft and fRight if needed. + + @return fRight + */ + constexpr SkScalar right() const { return fRight; } + + /** Returns bottom edge of SkRect, if sorted. Call isEmpty() to see if SkRect may be invalid, + and sort() to reverse fTop and fBottom if needed. + + @return fBottom + */ + constexpr SkScalar bottom() const { return fBottom; } + + /** Returns span on the x-axis. This does not check if SkRect is sorted, or if + result fits in 32-bit float; result may be negative or infinity. + + @return fRight minus fLeft + */ + constexpr SkScalar width() const { return fRight - fLeft; } + + /** Returns span on the y-axis. This does not check if SkRect is sorted, or if + result fits in 32-bit float; result may be negative or infinity. + + @return fBottom minus fTop + */ + constexpr SkScalar height() const { return fBottom - fTop; } + + /** Returns average of left edge and right edge. Result does not change if SkRect + is sorted. Result may overflow to infinity if SkRect is far from the origin. + + @return midpoint on x-axis + */ + constexpr SkScalar centerX() const { + // don't use SkScalarHalf(fLeft + fBottom) as that might overflow before the 0.5 + return SkScalarHalf(fLeft) + SkScalarHalf(fRight); + } + + /** Returns average of top edge and bottom edge. Result does not change if SkRect + is sorted. + + @return midpoint on y-axis + */ + constexpr SkScalar centerY() const { + // don't use SkScalarHalf(fTop + fBottom) as that might overflow before the 0.5 + return SkScalarHalf(fTop) + SkScalarHalf(fBottom); + } + + /** Returns the point this->centerX(), this->centerY(). + @return rectangle center + */ + constexpr SkPoint center() const { return {this->centerX(), this->centerY()}; } + + /** Returns true if all members in a: fLeft, fTop, fRight, and fBottom; are + equal to the corresponding members in b. + + a and b are not equal if either contain NaN. a and b are equal if members + contain zeroes with different signs. + + @param a SkRect to compare + @param b SkRect to compare + @return true if members are equal + */ + friend bool operator==(const SkRect& a, const SkRect& b) { + return SkScalarsEqual((const SkScalar*)&a, (const SkScalar*)&b, 4); + } + + /** Returns true if any in a: fLeft, fTop, fRight, and fBottom; does not + equal the corresponding members in b. + + a and b are not equal if either contain NaN. a and b are equal if members + contain zeroes with different signs. + + @param a SkRect to compare + @param b SkRect to compare + @return true if members are not equal + */ + friend bool operator!=(const SkRect& a, const SkRect& b) { + return !SkScalarsEqual((const SkScalar*)&a, (const SkScalar*)&b, 4); + } + + /** Returns four points in quad that enclose SkRect ordered as: top-left, top-right, + bottom-right, bottom-left. + + TODO: Consider adding parameter to control whether quad is clockwise or counterclockwise. + + @param quad storage for corners of SkRect + + example: https://fiddle.skia.org/c/@Rect_toQuad + */ + void toQuad(SkPoint quad[4]) const; + + /** Sets SkRect to (0, 0, 0, 0). + + Many other rectangles are empty; if left is equal to or greater than right, + or if top is equal to or greater than bottom. Setting all members to zero + is a convenience, but does not designate a special empty rectangle. + */ + void setEmpty() { *this = MakeEmpty(); } + + /** Sets SkRect to src, promoting src members from integer to scalar. + Very large values in src may lose precision. + + @param src integer SkRect + */ + void set(const SkIRect& src) { + fLeft = SkIntToScalar(src.fLeft); + fTop = SkIntToScalar(src.fTop); + fRight = SkIntToScalar(src.fRight); + fBottom = SkIntToScalar(src.fBottom); + } + + /** Sets SkRect to (left, top, right, bottom). + left and right are not sorted; left is not necessarily less than right. + top and bottom are not sorted; top is not necessarily less than bottom. + + @param left stored in fLeft + @param top stored in fTop + @param right stored in fRight + @param bottom stored in fBottom + */ + void setLTRB(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom) { + fLeft = left; + fTop = top; + fRight = right; + fBottom = bottom; + } + + /** Sets to bounds of SkPoint array with count entries. If count is zero or smaller, + or if SkPoint array contains an infinity or NaN, sets to (0, 0, 0, 0). + + Result is either empty or sorted: fLeft is less than or equal to fRight, and + fTop is less than or equal to fBottom. + + @param pts SkPoint array + @param count entries in array + */ + void setBounds(const SkPoint pts[], int count) { + (void)this->setBoundsCheck(pts, count); + } + + /** Sets to bounds of SkPoint array with count entries. Returns false if count is + zero or smaller, or if SkPoint array contains an infinity or NaN; in these cases + sets SkRect to (0, 0, 0, 0). + + Result is either empty or sorted: fLeft is less than or equal to fRight, and + fTop is less than or equal to fBottom. + + @param pts SkPoint array + @param count entries in array + @return true if all SkPoint values are finite + + example: https://fiddle.skia.org/c/@Rect_setBoundsCheck + */ + bool setBoundsCheck(const SkPoint pts[], int count); + + /** Sets to bounds of SkPoint pts array with count entries. If any SkPoint in pts + contains infinity or NaN, all SkRect dimensions are set to NaN. + + @param pts SkPoint array + @param count entries in array + + example: https://fiddle.skia.org/c/@Rect_setBoundsNoCheck + */ + void setBoundsNoCheck(const SkPoint pts[], int count); + + /** Sets bounds to the smallest SkRect enclosing SkPoint p0 and p1. The result is + sorted and may be empty. Does not check to see if values are finite. + + @param p0 corner to include + @param p1 corner to include + */ + void set(const SkPoint& p0, const SkPoint& p1) { + fLeft = std::min(p0.fX, p1.fX); + fRight = std::max(p0.fX, p1.fX); + fTop = std::min(p0.fY, p1.fY); + fBottom = std::max(p0.fY, p1.fY); + } + + /** Sets SkRect to (x, y, x + width, y + height). + Does not validate input; width or height may be negative. + + @param x stored in fLeft + @param y stored in fTop + @param width added to x and stored in fRight + @param height added to y and stored in fBottom + */ + void setXYWH(SkScalar x, SkScalar y, SkScalar width, SkScalar height) { + fLeft = x; + fTop = y; + fRight = x + width; + fBottom = y + height; + } + + /** Sets SkRect to (0, 0, width, height). Does not validate input; + width or height may be negative. + + @param width stored in fRight + @param height stored in fBottom + */ + void setWH(SkScalar width, SkScalar height) { + fLeft = 0; + fTop = 0; + fRight = width; + fBottom = height; + } + void setIWH(int32_t width, int32_t height) { + this->setWH(SkIntToScalar(width), SkIntToScalar(height)); + } + + /** Returns SkRect offset by (dx, dy). + + If dx is negative, SkRect returned is moved to the left. + If dx is positive, SkRect returned is moved to the right. + If dy is negative, SkRect returned is moved upward. + If dy is positive, SkRect returned is moved downward. + + @param dx added to fLeft and fRight + @param dy added to fTop and fBottom + @return SkRect offset on axes, with original width and height + */ + constexpr SkRect makeOffset(SkScalar dx, SkScalar dy) const { + return MakeLTRB(fLeft + dx, fTop + dy, fRight + dx, fBottom + dy); + } + + /** Returns SkRect offset by v. + + @param v added to rect + @return SkRect offset on axes, with original width and height + */ + constexpr SkRect makeOffset(SkVector v) const { return this->makeOffset(v.x(), v.y()); } + + /** Returns SkRect, inset by (dx, dy). + + If dx is negative, SkRect returned is wider. + If dx is positive, SkRect returned is narrower. + If dy is negative, SkRect returned is taller. + If dy is positive, SkRect returned is shorter. + + @param dx added to fLeft and subtracted from fRight + @param dy added to fTop and subtracted from fBottom + @return SkRect inset symmetrically left and right, top and bottom + */ + SkRect makeInset(SkScalar dx, SkScalar dy) const { + return MakeLTRB(fLeft + dx, fTop + dy, fRight - dx, fBottom - dy); + } + + /** Returns SkRect, outset by (dx, dy). + + If dx is negative, SkRect returned is narrower. + If dx is positive, SkRect returned is wider. + If dy is negative, SkRect returned is shorter. + If dy is positive, SkRect returned is taller. + + @param dx subtracted to fLeft and added from fRight + @param dy subtracted to fTop and added from fBottom + @return SkRect outset symmetrically left and right, top and bottom + */ + SkRect makeOutset(SkScalar dx, SkScalar dy) const { + return MakeLTRB(fLeft - dx, fTop - dy, fRight + dx, fBottom + dy); + } + + /** Offsets SkRect by adding dx to fLeft, fRight; and by adding dy to fTop, fBottom. + + If dx is negative, moves SkRect to the left. + If dx is positive, moves SkRect to the right. + If dy is negative, moves SkRect upward. + If dy is positive, moves SkRect downward. + + @param dx offset added to fLeft and fRight + @param dy offset added to fTop and fBottom + */ + void offset(SkScalar dx, SkScalar dy) { + fLeft += dx; + fTop += dy; + fRight += dx; + fBottom += dy; + } + + /** Offsets SkRect by adding delta.fX to fLeft, fRight; and by adding delta.fY to + fTop, fBottom. + + If delta.fX is negative, moves SkRect to the left. + If delta.fX is positive, moves SkRect to the right. + If delta.fY is negative, moves SkRect upward. + If delta.fY is positive, moves SkRect downward. + + @param delta added to SkRect + */ + void offset(const SkPoint& delta) { + this->offset(delta.fX, delta.fY); + } + + /** Offsets SkRect so that fLeft equals newX, and fTop equals newY. width and height + are unchanged. + + @param newX stored in fLeft, preserving width() + @param newY stored in fTop, preserving height() + */ + void offsetTo(SkScalar newX, SkScalar newY) { + fRight += newX - fLeft; + fBottom += newY - fTop; + fLeft = newX; + fTop = newY; + } + + /** Insets SkRect by (dx, dy). + + If dx is positive, makes SkRect narrower. + If dx is negative, makes SkRect wider. + If dy is positive, makes SkRect shorter. + If dy is negative, makes SkRect taller. + + @param dx added to fLeft and subtracted from fRight + @param dy added to fTop and subtracted from fBottom + */ + void inset(SkScalar dx, SkScalar dy) { + fLeft += dx; + fTop += dy; + fRight -= dx; + fBottom -= dy; + } + + /** Outsets SkRect by (dx, dy). + + If dx is positive, makes SkRect wider. + If dx is negative, makes SkRect narrower. + If dy is positive, makes SkRect taller. + If dy is negative, makes SkRect shorter. + + @param dx subtracted to fLeft and added from fRight + @param dy subtracted to fTop and added from fBottom + */ + void outset(SkScalar dx, SkScalar dy) { this->inset(-dx, -dy); } + + /** Returns true if SkRect intersects r, and sets SkRect to intersection. + Returns false if SkRect does not intersect r, and leaves SkRect unchanged. + + Returns false if either r or SkRect is empty, leaving SkRect unchanged. + + @param r limit of result + @return true if r and SkRect have area in common + + example: https://fiddle.skia.org/c/@Rect_intersect + */ + bool intersect(const SkRect& r); + + /** Returns true if a intersects b, and sets SkRect to intersection. + Returns false if a does not intersect b, and leaves SkRect unchanged. + + Returns false if either a or b is empty, leaving SkRect unchanged. + + @param a SkRect to intersect + @param b SkRect to intersect + @return true if a and b have area in common + */ + bool SK_WARN_UNUSED_RESULT intersect(const SkRect& a, const SkRect& b); + + +private: + static bool Intersects(SkScalar al, SkScalar at, SkScalar ar, SkScalar ab, + SkScalar bl, SkScalar bt, SkScalar br, SkScalar bb) { + SkScalar L = std::max(al, bl); + SkScalar R = std::min(ar, br); + SkScalar T = std::max(at, bt); + SkScalar B = std::min(ab, bb); + return L < R && T < B; + } + +public: + + /** Returns true if SkRect intersects r. + Returns false if either r or SkRect is empty, or do not intersect. + + @param r SkRect to intersect + @return true if r and SkRect have area in common + */ + bool intersects(const SkRect& r) const { + return Intersects(fLeft, fTop, fRight, fBottom, + r.fLeft, r.fTop, r.fRight, r.fBottom); + } + + /** Returns true if a intersects b. + Returns false if either a or b is empty, or do not intersect. + + @param a SkRect to intersect + @param b SkRect to intersect + @return true if a and b have area in common + */ + static bool Intersects(const SkRect& a, const SkRect& b) { + return Intersects(a.fLeft, a.fTop, a.fRight, a.fBottom, + b.fLeft, b.fTop, b.fRight, b.fBottom); + } + + /** Sets SkRect to the union of itself and r. + + Has no effect if r is empty. Otherwise, if SkRect is empty, sets + SkRect to r. + + @param r expansion SkRect + + example: https://fiddle.skia.org/c/@Rect_join_2 + */ + void join(const SkRect& r); + + /** Sets SkRect to the union of itself and r. + + Asserts if r is empty and SK_DEBUG is defined. + If SkRect is empty, sets SkRect to r. + + May produce incorrect results if r is empty. + + @param r expansion SkRect + */ + void joinNonEmptyArg(const SkRect& r) { + SkASSERT(!r.isEmpty()); + // if we are empty, just assign + if (fLeft >= fRight || fTop >= fBottom) { + *this = r; + } else { + this->joinPossiblyEmptyRect(r); + } + } + + /** Sets SkRect to the union of itself and the construction. + + May produce incorrect results if SkRect or r is empty. + + @param r expansion SkRect + */ + void joinPossiblyEmptyRect(const SkRect& r) { + fLeft = std::min(fLeft, r.left()); + fTop = std::min(fTop, r.top()); + fRight = std::max(fRight, r.right()); + fBottom = std::max(fBottom, r.bottom()); + } + + /** Returns true if: fLeft <= x < fRight && fTop <= y < fBottom. + Returns false if SkRect is empty. + + @param x test SkPoint x-coordinate + @param y test SkPoint y-coordinate + @return true if (x, y) is inside SkRect + */ + bool contains(SkScalar x, SkScalar y) const { + return x >= fLeft && x < fRight && y >= fTop && y < fBottom; + } + + /** Returns true if SkRect contains r. + Returns false if SkRect is empty or r is empty. + + SkRect contains r when SkRect area completely includes r area. + + @param r SkRect contained + @return true if all sides of SkRect are outside r + */ + bool contains(const SkRect& r) const { + // todo: can we eliminate the this->isEmpty check? + return !r.isEmpty() && !this->isEmpty() && + fLeft <= r.fLeft && fTop <= r.fTop && + fRight >= r.fRight && fBottom >= r.fBottom; + } + + /** Returns true if SkRect contains r. + Returns false if SkRect is empty or r is empty. + + SkRect contains r when SkRect area completely includes r area. + + @param r SkIRect contained + @return true if all sides of SkRect are outside r + */ + bool contains(const SkIRect& r) const { + // todo: can we eliminate the this->isEmpty check? + return !r.isEmpty() && !this->isEmpty() && + fLeft <= SkIntToScalar(r.fLeft) && fTop <= SkIntToScalar(r.fTop) && + fRight >= SkIntToScalar(r.fRight) && fBottom >= SkIntToScalar(r.fBottom); + } + + /** Sets SkIRect by adding 0.5 and discarding the fractional portion of SkRect + members, using (SkScalarRoundToInt(fLeft), SkScalarRoundToInt(fTop), + SkScalarRoundToInt(fRight), SkScalarRoundToInt(fBottom)). + + @param dst storage for SkIRect + */ + void round(SkIRect* dst) const { + SkASSERT(dst); + dst->setLTRB(SkScalarRoundToInt(fLeft), SkScalarRoundToInt(fTop), + SkScalarRoundToInt(fRight), SkScalarRoundToInt(fBottom)); + } + + /** Sets SkIRect by discarding the fractional portion of fLeft and fTop; and rounding + up fRight and fBottom, using + (SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop), + SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom)). + + @param dst storage for SkIRect + */ + void roundOut(SkIRect* dst) const { + SkASSERT(dst); + dst->setLTRB(SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop), + SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom)); + } + + /** Sets SkRect by discarding the fractional portion of fLeft and fTop; and rounding + up fRight and fBottom, using + (SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop), + SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom)). + + @param dst storage for SkRect + */ + void roundOut(SkRect* dst) const { + dst->setLTRB(SkScalarFloorToScalar(fLeft), SkScalarFloorToScalar(fTop), + SkScalarCeilToScalar(fRight), SkScalarCeilToScalar(fBottom)); + } + + /** Sets SkRect by rounding up fLeft and fTop; and discarding the fractional portion + of fRight and fBottom, using + (SkScalarCeilToInt(fLeft), SkScalarCeilToInt(fTop), + SkScalarFloorToInt(fRight), SkScalarFloorToInt(fBottom)). + + @param dst storage for SkIRect + */ + void roundIn(SkIRect* dst) const { + SkASSERT(dst); + dst->setLTRB(SkScalarCeilToInt(fLeft), SkScalarCeilToInt(fTop), + SkScalarFloorToInt(fRight), SkScalarFloorToInt(fBottom)); + } + + /** Returns SkIRect by adding 0.5 and discarding the fractional portion of SkRect + members, using (SkScalarRoundToInt(fLeft), SkScalarRoundToInt(fTop), + SkScalarRoundToInt(fRight), SkScalarRoundToInt(fBottom)). + + @return rounded SkIRect + */ + SkIRect round() const { + SkIRect ir; + this->round(&ir); + return ir; + } + + /** Sets SkIRect by discarding the fractional portion of fLeft and fTop; and rounding + up fRight and fBottom, using + (SkScalarFloorToInt(fLeft), SkScalarFloorToInt(fTop), + SkScalarCeilToInt(fRight), SkScalarCeilToInt(fBottom)). + + @return rounded SkIRect + */ + SkIRect roundOut() const { + SkIRect ir; + this->roundOut(&ir); + return ir; + } + /** Sets SkIRect by rounding up fLeft and fTop; and discarding the fractional portion + of fRight and fBottom, using + (SkScalarCeilToInt(fLeft), SkScalarCeilToInt(fTop), + SkScalarFloorToInt(fRight), SkScalarFloorToInt(fBottom)). + + @return rounded SkIRect + */ + SkIRect roundIn() const { + SkIRect ir; + this->roundIn(&ir); + return ir; + } + + /** Swaps fLeft and fRight if fLeft is greater than fRight; and swaps + fTop and fBottom if fTop is greater than fBottom. Result may be empty; + and width() and height() will be zero or positive. + */ + void sort() { + using std::swap; + if (fLeft > fRight) { + swap(fLeft, fRight); + } + + if (fTop > fBottom) { + swap(fTop, fBottom); + } + } + + /** Returns SkRect with fLeft and fRight swapped if fLeft is greater than fRight; and + with fTop and fBottom swapped if fTop is greater than fBottom. Result may be empty; + and width() and height() will be zero or positive. + + @return sorted SkRect + */ + SkRect makeSorted() const { + return MakeLTRB(std::min(fLeft, fRight), std::min(fTop, fBottom), + std::max(fLeft, fRight), std::max(fTop, fBottom)); + } + + /** Returns pointer to first scalar in SkRect, to treat it as an array with four + entries. + + @return pointer to fLeft + */ + const SkScalar* asScalars() const { return &fLeft; } + + /** Writes text representation of SkRect to standard output. Set asHex to true to + generate exact binary representations of floating point numbers. + + @param asHex true if SkScalar values are written as hexadecimal + + example: https://fiddle.skia.org/c/@Rect_dump + */ + void dump(bool asHex) const; + + /** Writes text representation of SkRect to standard output. The representation may be + directly compiled as C++ code. Floating point values are written + with limited precision; it may not be possible to reconstruct original SkRect + from output. + */ + void dump() const { this->dump(false); } + + /** Writes text representation of SkRect to standard output. The representation may be + directly compiled as C++ code. Floating point values are written + in hexadecimal to preserve their exact bit pattern. The output reconstructs the + original SkRect. + + Use instead of dump() when submitting + */ + void dumpHex() const { this->dump(true); } +}; + +inline bool SkIRect::contains(const SkRect& r) const { + return !r.isEmpty() && !this->isEmpty() && // check for empties + (SkScalar)fLeft <= r.fLeft && (SkScalar)fTop <= r.fTop && + (SkScalar)fRight >= r.fRight && (SkScalar)fBottom >= r.fBottom; +} + +#endif diff --git a/gfx/skia/skia/include/core/SkRefCnt.h b/gfx/skia/skia/include/core/SkRefCnt.h new file mode 100644 index 0000000000..668de14e1d --- /dev/null +++ b/gfx/skia/skia/include/core/SkRefCnt.h @@ -0,0 +1,389 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRefCnt_DEFINED +#define SkRefCnt_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" + +#include +#include +#include +#include +#include +#include + +/** \class SkRefCntBase + + SkRefCntBase is the base class for objects that may be shared by multiple + objects. When an existing owner wants to share a reference, it calls ref(). + When an owner wants to release its reference, it calls unref(). When the + shared object's reference count goes to zero as the result of an unref() + call, its (virtual) destructor is called. It is an error for the + destructor to be called explicitly (or via the object going out of scope on + the stack or calling delete) if getRefCnt() > 1. +*/ +class SK_API SkRefCntBase { +public: + /** Default construct, initializing the reference count to 1. + */ + SkRefCntBase() : fRefCnt(1) {} + + /** Destruct, asserting that the reference count is 1. + */ + virtual ~SkRefCntBase() { + #ifdef SK_DEBUG + SkASSERTF(this->getRefCnt() == 1, "fRefCnt was %d", this->getRefCnt()); + // illegal value, to catch us if we reuse after delete + fRefCnt.store(0, std::memory_order_relaxed); + #endif + } + + /** May return true if the caller is the only owner. + * Ensures that all previous owner's actions are complete. + */ + bool unique() const { + if (1 == fRefCnt.load(std::memory_order_acquire)) { + // The acquire barrier is only really needed if we return true. It + // prevents code conditioned on the result of unique() from running + // until previous owners are all totally done calling unref(). + return true; + } + return false; + } + + /** Increment the reference count. Must be balanced by a call to unref(). + */ + void ref() const { + SkASSERT(this->getRefCnt() > 0); + // No barrier required. + (void)fRefCnt.fetch_add(+1, std::memory_order_relaxed); + } + + /** Decrement the reference count. If the reference count is 1 before the + decrement, then delete the object. Note that if this is the case, then + the object needs to have been allocated via new, and not on the stack. + */ + void unref() const { + SkASSERT(this->getRefCnt() > 0); + // A release here acts in place of all releases we "should" have been doing in ref(). + if (1 == fRefCnt.fetch_add(-1, std::memory_order_acq_rel)) { + // Like unique(), the acquire is only needed on success, to make sure + // code in internal_dispose() doesn't happen before the decrement. + this->internal_dispose(); + } + } + +private: + +#ifdef SK_DEBUG + /** Return the reference count. Use only for debugging. */ + int32_t getRefCnt() const { + return fRefCnt.load(std::memory_order_relaxed); + } +#endif + + /** + * Called when the ref count goes to 0. + */ + virtual void internal_dispose() const { + #ifdef SK_DEBUG + SkASSERT(0 == this->getRefCnt()); + fRefCnt.store(1, std::memory_order_relaxed); + #endif + delete this; + } + + // The following friends are those which override internal_dispose() + // and conditionally call SkRefCnt::internal_dispose(). + friend class SkWeakRefCnt; + + mutable std::atomic fRefCnt; + + SkRefCntBase(SkRefCntBase&&) = delete; + SkRefCntBase(const SkRefCntBase&) = delete; + SkRefCntBase& operator=(SkRefCntBase&&) = delete; + SkRefCntBase& operator=(const SkRefCntBase&) = delete; +}; + +#ifdef SK_REF_CNT_MIXIN_INCLUDE +// It is the responsibility of the following include to define the type SkRefCnt. +// This SkRefCnt should normally derive from SkRefCntBase. +#include SK_REF_CNT_MIXIN_INCLUDE +#else +class SK_API SkRefCnt : public SkRefCntBase { + // "#include SK_REF_CNT_MIXIN_INCLUDE" doesn't work with this build system. + #if defined(SK_BUILD_FOR_GOOGLE3) + public: + void deref() const { this->unref(); } + #endif +}; +#endif + +/////////////////////////////////////////////////////////////////////////////// + +/** Call obj->ref() and return obj. The obj must not be nullptr. + */ +template static inline T* SkRef(T* obj) { + SkASSERT(obj); + obj->ref(); + return obj; +} + +/** Check if the argument is non-null, and if so, call obj->ref() and return obj. + */ +template static inline T* SkSafeRef(T* obj) { + if (obj) { + obj->ref(); + } + return obj; +} + +/** Check if the argument is non-null, and if so, call obj->unref() + */ +template static inline void SkSafeUnref(T* obj) { + if (obj) { + obj->unref(); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +// This is a variant of SkRefCnt that's Not Virtual, so weighs 4 bytes instead of 8 or 16. +// There's only benefit to using this if the deriving class does not otherwise need a vtable. +template +class SkNVRefCnt { +public: + SkNVRefCnt() : fRefCnt(1) {} + ~SkNVRefCnt() { + #ifdef SK_DEBUG + int rc = fRefCnt.load(std::memory_order_relaxed); + SkASSERTF(rc == 1, "NVRefCnt was %d", rc); + #endif + } + + // Implementation is pretty much the same as SkRefCntBase. All required barriers are the same: + // - unique() needs acquire when it returns true, and no barrier if it returns false; + // - ref() doesn't need any barrier; + // - unref() needs a release barrier, and an acquire if it's going to call delete. + + bool unique() const { return 1 == fRefCnt.load(std::memory_order_acquire); } + void ref() const { (void)fRefCnt.fetch_add(+1, std::memory_order_relaxed); } + void unref() const { + if (1 == fRefCnt.fetch_add(-1, std::memory_order_acq_rel)) { + // restore the 1 for our destructor's assert + SkDEBUGCODE(fRefCnt.store(1, std::memory_order_relaxed)); + delete (const Derived*)this; + } + } + void deref() const { this->unref(); } + + // This must be used with caution. It is only valid to call this when 'threadIsolatedTestCnt' + // refs are known to be isolated to the current thread. That is, it is known that there are at + // least 'threadIsolatedTestCnt' refs for which no other thread may make a balancing unref() + // call. Assuming the contract is followed, if this returns false then no other thread has + // ownership of this. If it returns true then another thread *may* have ownership. + bool refCntGreaterThan(int32_t threadIsolatedTestCnt) const { + int cnt = fRefCnt.load(std::memory_order_acquire); + // If this fails then the above contract has been violated. + SkASSERT(cnt >= threadIsolatedTestCnt); + return cnt > threadIsolatedTestCnt; + } + +private: + mutable std::atomic fRefCnt; + + SkNVRefCnt(SkNVRefCnt&&) = delete; + SkNVRefCnt(const SkNVRefCnt&) = delete; + SkNVRefCnt& operator=(SkNVRefCnt&&) = delete; + SkNVRefCnt& operator=(const SkNVRefCnt&) = delete; +}; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +/** + * Shared pointer class to wrap classes that support a ref()/unref() interface. + * + * This can be used for classes inheriting from SkRefCnt, but it also works for other + * classes that match the interface, but have different internal choices: e.g. the hosted class + * may have its ref/unref be thread-safe, but that is not assumed/imposed by sk_sp. + * + * Declared with the trivial_abi attribute where supported so that sk_sp and types containing it + * may be considered as trivially relocatable by the compiler so that destroying-move operations + * i.e. move constructor followed by destructor can be optimized to memcpy. + */ +template class SK_TRIVIAL_ABI sk_sp { +public: + using element_type = T; + + constexpr sk_sp() : fPtr(nullptr) {} + constexpr sk_sp(std::nullptr_t) : fPtr(nullptr) {} + + /** + * Shares the underlying object by calling ref(), so that both the argument and the newly + * created sk_sp both have a reference to it. + */ + sk_sp(const sk_sp& that) : fPtr(SkSafeRef(that.get())) {} + template ::value>::type> + sk_sp(const sk_sp& that) : fPtr(SkSafeRef(that.get())) {} + + /** + * Move the underlying object from the argument to the newly created sk_sp. Afterwards only + * the new sk_sp will have a reference to the object, and the argument will point to null. + * No call to ref() or unref() will be made. + */ + sk_sp(sk_sp&& that) : fPtr(that.release()) {} + template ::value>::type> + sk_sp(sk_sp&& that) : fPtr(that.release()) {} + + /** + * Adopt the bare pointer into the newly created sk_sp. + * No call to ref() or unref() will be made. + */ + explicit sk_sp(T* obj) : fPtr(obj) {} + + /** + * Calls unref() on the underlying object pointer. + */ + ~sk_sp() { + SkSafeUnref(fPtr); + SkDEBUGCODE(fPtr = nullptr); + } + + sk_sp& operator=(std::nullptr_t) { this->reset(); return *this; } + + /** + * Shares the underlying object referenced by the argument by calling ref() on it. If this + * sk_sp previously had a reference to an object (i.e. not null) it will call unref() on that + * object. + */ + sk_sp& operator=(const sk_sp& that) { + if (this != &that) { + this->reset(SkSafeRef(that.get())); + } + return *this; + } + template ::value>::type> + sk_sp& operator=(const sk_sp& that) { + this->reset(SkSafeRef(that.get())); + return *this; + } + + /** + * Move the underlying object from the argument to the sk_sp. If the sk_sp previously held + * a reference to another object, unref() will be called on that object. No call to ref() + * will be made. + */ + sk_sp& operator=(sk_sp&& that) { + this->reset(that.release()); + return *this; + } + template ::value>::type> + sk_sp& operator=(sk_sp&& that) { + this->reset(that.release()); + return *this; + } + + T& operator*() const { + SkASSERT(this->get() != nullptr); + return *this->get(); + } + + explicit operator bool() const { return this->get() != nullptr; } + + T* get() const { return fPtr; } + T* operator->() const { return fPtr; } + + /** + * Adopt the new bare pointer, and call unref() on any previously held object (if not null). + * No call to ref() will be made. + */ + void reset(T* ptr = nullptr) { + // Calling fPtr->unref() may call this->~() or this->reset(T*). + // http://wg21.cmeerw.net/lwg/issue998 + // http://wg21.cmeerw.net/lwg/issue2262 + T* oldPtr = fPtr; + fPtr = ptr; + SkSafeUnref(oldPtr); + } + + /** + * Return the bare pointer, and set the internal object pointer to nullptr. + * The caller must assume ownership of the object, and manage its reference count directly. + * No call to unref() will be made. + */ + T* SK_WARN_UNUSED_RESULT release() { + T* ptr = fPtr; + fPtr = nullptr; + return ptr; + } + + void swap(sk_sp& that) /*noexcept*/ { + using std::swap; + swap(fPtr, that.fPtr); + } + + using sk_is_trivially_relocatable = std::true_type; + +private: + T* fPtr; +}; + +template inline void swap(sk_sp& a, sk_sp& b) /*noexcept*/ { + a.swap(b); +} + +template inline bool operator==(const sk_sp& a, const sk_sp& b) { + return a.get() == b.get(); +} +template inline bool operator==(const sk_sp& a, std::nullptr_t) /*noexcept*/ { + return !a; +} +template inline bool operator==(std::nullptr_t, const sk_sp& b) /*noexcept*/ { + return !b; +} + +template inline bool operator!=(const sk_sp& a, const sk_sp& b) { + return a.get() != b.get(); +} +template inline bool operator!=(const sk_sp& a, std::nullptr_t) /*noexcept*/ { + return static_cast(a); +} +template inline bool operator!=(std::nullptr_t, const sk_sp& b) /*noexcept*/ { + return static_cast(b); +} + +template +auto operator<<(std::basic_ostream& os, const sk_sp& sp) -> decltype(os << sp.get()) { + return os << sp.get(); +} + +template +sk_sp sk_make_sp(Args&&... args) { + return sk_sp(new T(std::forward(args)...)); +} + +/* + * Returns a sk_sp wrapping the provided ptr AND calls ref on it (if not null). + * + * This is different than the semantics of the constructor for sk_sp, which just wraps the ptr, + * effectively "adopting" it. + */ +template sk_sp sk_ref_sp(T* obj) { + return sk_sp(SkSafeRef(obj)); +} + +template sk_sp sk_ref_sp(const T* obj) { + return sk_sp(const_cast(SkSafeRef(obj))); +} + +#endif diff --git a/gfx/skia/skia/include/core/SkRegion.h b/gfx/skia/skia/include/core/SkRegion.h new file mode 100644 index 0000000000..6f8aa25d54 --- /dev/null +++ b/gfx/skia/skia/include/core/SkRegion.h @@ -0,0 +1,678 @@ +/* + * Copyright 2005 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRegion_DEFINED +#define SkRegion_DEFINED + +#include "include/core/SkRect.h" +#include "include/private/base/SkTypeTraits.h" + +class SkPath; +class SkRgnBuilder; + +/** \class SkRegion + SkRegion describes the set of pixels used to clip SkCanvas. SkRegion is compact, + efficiently storing a single integer rectangle, or a run length encoded array + of rectangles. SkRegion may reduce the current SkCanvas clip, or may be drawn as + one or more integer rectangles. SkRegion iterator returns the scan lines or + rectangles contained by it, optionally intersecting a bounding rectangle. +*/ +class SK_API SkRegion { + typedef int32_t RunType; +public: + + /** Constructs an empty SkRegion. SkRegion is set to empty bounds + at (0, 0) with zero width and height. + + @return empty SkRegion + + example: https://fiddle.skia.org/c/@Region_empty_constructor + */ + SkRegion(); + + /** Constructs a copy of an existing region. + Copy constructor makes two regions identical by value. Internally, region and + the returned result share pointer values. The underlying SkRect array is + copied when modified. + + Creating a SkRegion copy is very efficient and never allocates memory. + SkRegion are always copied by value from the interface; the underlying shared + pointers are not exposed. + + @param region SkRegion to copy by value + @return copy of SkRegion + + example: https://fiddle.skia.org/c/@Region_copy_const_SkRegion + */ + SkRegion(const SkRegion& region); + + /** Constructs a rectangular SkRegion matching the bounds of rect. + + @param rect bounds of constructed SkRegion + @return rectangular SkRegion + + example: https://fiddle.skia.org/c/@Region_copy_const_SkIRect + */ + explicit SkRegion(const SkIRect& rect); + + /** Releases ownership of any shared data and deletes data if SkRegion is sole owner. + + example: https://fiddle.skia.org/c/@Region_destructor + */ + ~SkRegion(); + + /** Constructs a copy of an existing region. + Makes two regions identical by value. Internally, region and + the returned result share pointer values. The underlying SkRect array is + copied when modified. + + Creating a SkRegion copy is very efficient and never allocates memory. + SkRegion are always copied by value from the interface; the underlying shared + pointers are not exposed. + + @param region SkRegion to copy by value + @return SkRegion to copy by value + + example: https://fiddle.skia.org/c/@Region_copy_operator + */ + SkRegion& operator=(const SkRegion& region); + + /** Compares SkRegion and other; returns true if they enclose exactly + the same area. + + @param other SkRegion to compare + @return true if SkRegion pair are equivalent + + example: https://fiddle.skia.org/c/@Region_equal1_operator + */ + bool operator==(const SkRegion& other) const; + + /** Compares SkRegion and other; returns true if they do not enclose the same area. + + @param other SkRegion to compare + @return true if SkRegion pair are not equivalent + */ + bool operator!=(const SkRegion& other) const { + return !(*this == other); + } + + /** Sets SkRegion to src, and returns true if src bounds is not empty. + This makes SkRegion and src identical by value. Internally, + SkRegion and src share pointer values. The underlying SkRect array is + copied when modified. + + Creating a SkRegion copy is very efficient and never allocates memory. + SkRegion are always copied by value from the interface; the underlying shared + pointers are not exposed. + + @param src SkRegion to copy + @return copy of src + */ + bool set(const SkRegion& src) { + *this = src; + return !this->isEmpty(); + } + + /** Exchanges SkIRect array of SkRegion and other. swap() internally exchanges pointers, + so it is lightweight and does not allocate memory. + + swap() usage has largely been replaced by operator=(const SkRegion& region). + SkPath do not copy their content on assignment until they are written to, + making assignment as efficient as swap(). + + @param other operator=(const SkRegion& region) set + + example: https://fiddle.skia.org/c/@Region_swap + */ + void swap(SkRegion& other); + + /** Returns true if SkRegion is empty. + Empty SkRegion has bounds width or height less than or equal to zero. + SkRegion() constructs empty SkRegion; setEmpty() + and setRect() with dimensionless data make SkRegion empty. + + @return true if bounds has no width or height + */ + bool isEmpty() const { return fRunHead == emptyRunHeadPtr(); } + + /** Returns true if SkRegion is one SkIRect with positive dimensions. + + @return true if SkRegion contains one SkIRect + */ + bool isRect() const { return fRunHead == kRectRunHeadPtr; } + + /** Returns true if SkRegion is described by more than one rectangle. + + @return true if SkRegion contains more than one SkIRect + */ + bool isComplex() const { return !this->isEmpty() && !this->isRect(); } + + /** Returns minimum and maximum axes values of SkIRect array. + Returns (0, 0, 0, 0) if SkRegion is empty. + + @return combined bounds of all SkIRect elements + */ + const SkIRect& getBounds() const { return fBounds; } + + /** Returns a value that increases with the number of + elements in SkRegion. Returns zero if SkRegion is empty. + Returns one if SkRegion equals SkIRect; otherwise, returns + value greater than one indicating that SkRegion is complex. + + Call to compare SkRegion for relative complexity. + + @return relative complexity + + example: https://fiddle.skia.org/c/@Region_computeRegionComplexity + */ + int computeRegionComplexity() const; + + /** Appends outline of SkRegion to path. + Returns true if SkRegion is not empty; otherwise, returns false, and leaves path + unmodified. + + @param path SkPath to append to + @return true if path changed + + example: https://fiddle.skia.org/c/@Region_getBoundaryPath + */ + bool getBoundaryPath(SkPath* path) const; + + /** Constructs an empty SkRegion. SkRegion is set to empty bounds + at (0, 0) with zero width and height. Always returns false. + + @return false + + example: https://fiddle.skia.org/c/@Region_setEmpty + */ + bool setEmpty(); + + /** Constructs a rectangular SkRegion matching the bounds of rect. + If rect is empty, constructs empty and returns false. + + @param rect bounds of constructed SkRegion + @return true if rect is not empty + + example: https://fiddle.skia.org/c/@Region_setRect + */ + bool setRect(const SkIRect& rect); + + /** Constructs SkRegion as the union of SkIRect in rects array. If count is + zero, constructs empty SkRegion. Returns false if constructed SkRegion is empty. + + May be faster than repeated calls to op(). + + @param rects array of SkIRect + @param count array size + @return true if constructed SkRegion is not empty + + example: https://fiddle.skia.org/c/@Region_setRects + */ + bool setRects(const SkIRect rects[], int count); + + /** Constructs a copy of an existing region. + Makes two regions identical by value. Internally, region and + the returned result share pointer values. The underlying SkRect array is + copied when modified. + + Creating a SkRegion copy is very efficient and never allocates memory. + SkRegion are always copied by value from the interface; the underlying shared + pointers are not exposed. + + @param region SkRegion to copy by value + @return SkRegion to copy by value + + example: https://fiddle.skia.org/c/@Region_setRegion + */ + bool setRegion(const SkRegion& region); + + /** Constructs SkRegion to match outline of path within clip. + Returns false if constructed SkRegion is empty. + + Constructed SkRegion draws the same pixels as path through clip when + anti-aliasing is disabled. + + @param path SkPath providing outline + @param clip SkRegion containing path + @return true if constructed SkRegion is not empty + + example: https://fiddle.skia.org/c/@Region_setPath + */ + bool setPath(const SkPath& path, const SkRegion& clip); + + /** Returns true if SkRegion intersects rect. + Returns false if either rect or SkRegion is empty, or do not intersect. + + @param rect SkIRect to intersect + @return true if rect and SkRegion have area in common + + example: https://fiddle.skia.org/c/@Region_intersects + */ + bool intersects(const SkIRect& rect) const; + + /** Returns true if SkRegion intersects other. + Returns false if either other or SkRegion is empty, or do not intersect. + + @param other SkRegion to intersect + @return true if other and SkRegion have area in common + + example: https://fiddle.skia.org/c/@Region_intersects_2 + */ + bool intersects(const SkRegion& other) const; + + /** Returns true if SkIPoint (x, y) is inside SkRegion. + Returns false if SkRegion is empty. + + @param x test SkIPoint x-coordinate + @param y test SkIPoint y-coordinate + @return true if (x, y) is inside SkRegion + + example: https://fiddle.skia.org/c/@Region_contains + */ + bool contains(int32_t x, int32_t y) const; + + /** Returns true if other is completely inside SkRegion. + Returns false if SkRegion or other is empty. + + @param other SkIRect to contain + @return true if other is inside SkRegion + + example: https://fiddle.skia.org/c/@Region_contains_2 + */ + bool contains(const SkIRect& other) const; + + /** Returns true if other is completely inside SkRegion. + Returns false if SkRegion or other is empty. + + @param other SkRegion to contain + @return true if other is inside SkRegion + + example: https://fiddle.skia.org/c/@Region_contains_3 + */ + bool contains(const SkRegion& other) const; + + /** Returns true if SkRegion is a single rectangle and contains r. + May return false even though SkRegion contains r. + + @param r SkIRect to contain + @return true quickly if r points are equal or inside + */ + bool quickContains(const SkIRect& r) const { + SkASSERT(this->isEmpty() == fBounds.isEmpty()); // valid region + + return r.fLeft < r.fRight && r.fTop < r.fBottom && + fRunHead == kRectRunHeadPtr && // this->isRect() + /* fBounds.contains(left, top, right, bottom); */ + fBounds.fLeft <= r.fLeft && fBounds.fTop <= r.fTop && + fBounds.fRight >= r.fRight && fBounds.fBottom >= r.fBottom; + } + + /** Returns true if SkRegion does not intersect rect. + Returns true if rect is empty or SkRegion is empty. + May return false even though SkRegion does not intersect rect. + + @param rect SkIRect to intersect + @return true if rect does not intersect + */ + bool quickReject(const SkIRect& rect) const { + return this->isEmpty() || rect.isEmpty() || + !SkIRect::Intersects(fBounds, rect); + } + + /** Returns true if SkRegion does not intersect rgn. + Returns true if rgn is empty or SkRegion is empty. + May return false even though SkRegion does not intersect rgn. + + @param rgn SkRegion to intersect + @return true if rgn does not intersect + */ + bool quickReject(const SkRegion& rgn) const { + return this->isEmpty() || rgn.isEmpty() || + !SkIRect::Intersects(fBounds, rgn.fBounds); + } + + /** Offsets SkRegion by ivector (dx, dy). Has no effect if SkRegion is empty. + + @param dx x-axis offset + @param dy y-axis offset + */ + void translate(int dx, int dy) { this->translate(dx, dy, this); } + + /** Offsets SkRegion by ivector (dx, dy), writing result to dst. SkRegion may be passed + as dst parameter, translating SkRegion in place. Has no effect if dst is nullptr. + If SkRegion is empty, sets dst to empty. + + @param dx x-axis offset + @param dy y-axis offset + @param dst translated result + + example: https://fiddle.skia.org/c/@Region_translate_2 + */ + void translate(int dx, int dy, SkRegion* dst) const; + + /** \enum SkRegion::Op + The logical operations that can be performed when combining two SkRegion. + */ + enum Op { + kDifference_Op, //!< target minus operand + kIntersect_Op, //!< target intersected with operand + kUnion_Op, //!< target unioned with operand + kXOR_Op, //!< target exclusive or with operand + kReverseDifference_Op, //!< operand minus target + kReplace_Op, //!< replace target with operand + kLastOp = kReplace_Op, //!< last operator + }; + + static const int kOpCnt = kLastOp + 1; + + /** Replaces SkRegion with the result of SkRegion op rect. + Returns true if replaced SkRegion is not empty. + + @param rect SkIRect operand + @return false if result is empty + */ + bool op(const SkIRect& rect, Op op) { + if (this->isRect() && kIntersect_Op == op) { + if (!fBounds.intersect(rect)) { + return this->setEmpty(); + } + return true; + } + return this->op(*this, rect, op); + } + + /** Replaces SkRegion with the result of SkRegion op rgn. + Returns true if replaced SkRegion is not empty. + + @param rgn SkRegion operand + @return false if result is empty + */ + bool op(const SkRegion& rgn, Op op) { return this->op(*this, rgn, op); } + + /** Replaces SkRegion with the result of rect op rgn. + Returns true if replaced SkRegion is not empty. + + @param rect SkIRect operand + @param rgn SkRegion operand + @return false if result is empty + + example: https://fiddle.skia.org/c/@Region_op_4 + */ + bool op(const SkIRect& rect, const SkRegion& rgn, Op op); + + /** Replaces SkRegion with the result of rgn op rect. + Returns true if replaced SkRegion is not empty. + + @param rgn SkRegion operand + @param rect SkIRect operand + @return false if result is empty + + example: https://fiddle.skia.org/c/@Region_op_5 + */ + bool op(const SkRegion& rgn, const SkIRect& rect, Op op); + + /** Replaces SkRegion with the result of rgna op rgnb. + Returns true if replaced SkRegion is not empty. + + @param rgna SkRegion operand + @param rgnb SkRegion operand + @return false if result is empty + + example: https://fiddle.skia.org/c/@Region_op_6 + */ + bool op(const SkRegion& rgna, const SkRegion& rgnb, Op op); + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + /** Private. Android framework only. + + @return string representation of SkRegion + */ + char* toString(); +#endif + + /** \class SkRegion::Iterator + Returns sequence of rectangles, sorted along y-axis, then x-axis, that make + up SkRegion. + */ + class SK_API Iterator { + public: + + /** Initializes SkRegion::Iterator with an empty SkRegion. done() on SkRegion::Iterator + returns true. + Call reset() to initialized SkRegion::Iterator at a later time. + + @return empty SkRegion iterator + */ + Iterator() : fRgn(nullptr), fDone(true) {} + + /** Sets SkRegion::Iterator to return elements of SkIRect array in region. + + @param region SkRegion to iterate + @return SkRegion iterator + + example: https://fiddle.skia.org/c/@Region_Iterator_copy_const_SkRegion + */ + Iterator(const SkRegion& region); + + /** SkPoint SkRegion::Iterator to start of SkRegion. + Returns true if SkRegion was set; otherwise, returns false. + + @return true if SkRegion was set + + example: https://fiddle.skia.org/c/@Region_Iterator_rewind + */ + bool rewind(); + + /** Resets iterator, using the new SkRegion. + + @param region SkRegion to iterate + + example: https://fiddle.skia.org/c/@Region_Iterator_reset + */ + void reset(const SkRegion& region); + + /** Returns true if SkRegion::Iterator is pointing to final SkIRect in SkRegion. + + @return true if data parsing is complete + */ + bool done() const { return fDone; } + + /** Advances SkRegion::Iterator to next SkIRect in SkRegion if it is not done. + + example: https://fiddle.skia.org/c/@Region_Iterator_next + */ + void next(); + + /** Returns SkIRect element in SkRegion. Does not return predictable results if SkRegion + is empty. + + @return part of SkRegion as SkIRect + */ + const SkIRect& rect() const { return fRect; } + + /** Returns SkRegion if set; otherwise, returns nullptr. + + @return iterated SkRegion + */ + const SkRegion* rgn() const { return fRgn; } + + private: + const SkRegion* fRgn; + const SkRegion::RunType* fRuns; + SkIRect fRect = {0, 0, 0, 0}; + bool fDone; + }; + + /** \class SkRegion::Cliperator + Returns the sequence of rectangles, sorted along y-axis, then x-axis, that make + up SkRegion intersected with the specified clip rectangle. + */ + class SK_API Cliperator { + public: + + /** Sets SkRegion::Cliperator to return elements of SkIRect array in SkRegion within clip. + + @param region SkRegion to iterate + @param clip bounds of iteration + @return SkRegion iterator + + example: https://fiddle.skia.org/c/@Region_Cliperator_const_SkRegion_const_SkIRect + */ + Cliperator(const SkRegion& region, const SkIRect& clip); + + /** Returns true if SkRegion::Cliperator is pointing to final SkIRect in SkRegion. + + @return true if data parsing is complete + */ + bool done() { return fDone; } + + /** Advances iterator to next SkIRect in SkRegion contained by clip. + + example: https://fiddle.skia.org/c/@Region_Cliperator_next + */ + void next(); + + /** Returns SkIRect element in SkRegion, intersected with clip passed to + SkRegion::Cliperator constructor. Does not return predictable results if SkRegion + is empty. + + @return part of SkRegion inside clip as SkIRect + */ + const SkIRect& rect() const { return fRect; } + + private: + Iterator fIter; + SkIRect fClip; + SkIRect fRect = {0, 0, 0, 0}; + bool fDone; + }; + + /** \class SkRegion::Spanerator + Returns the line segment ends within SkRegion that intersect a horizontal line. + */ + class Spanerator { + public: + + /** Sets SkRegion::Spanerator to return line segments in SkRegion on scan line. + + @param region SkRegion to iterate + @param y horizontal line to intersect + @param left bounds of iteration + @param right bounds of iteration + @return SkRegion iterator + + example: https://fiddle.skia.org/c/@Region_Spanerator_const_SkRegion_int_int_int + */ + Spanerator(const SkRegion& region, int y, int left, int right); + + /** Advances iterator to next span intersecting SkRegion within line segment provided + in constructor. Returns true if interval was found. + + @param left pointer to span start; may be nullptr + @param right pointer to span end; may be nullptr + @return true if interval was found + + example: https://fiddle.skia.org/c/@Region_Spanerator_next + */ + bool next(int* left, int* right); + + private: + const SkRegion::RunType* fRuns; + int fLeft, fRight; + bool fDone; + }; + + /** Writes SkRegion to buffer, and returns number of bytes written. + If buffer is nullptr, returns number number of bytes that would be written. + + @param buffer storage for binary data + @return size of SkRegion + + example: https://fiddle.skia.org/c/@Region_writeToMemory + */ + size_t writeToMemory(void* buffer) const; + + /** Constructs SkRegion from buffer of size length. Returns bytes read. + Returned value will be multiple of four or zero if length was too small. + + @param buffer storage for binary data + @param length size of buffer + @return bytes read + + example: https://fiddle.skia.org/c/@Region_readFromMemory + */ + size_t readFromMemory(const void* buffer, size_t length); + + using sk_is_trivially_relocatable = std::true_type; + +private: + static constexpr int kOpCount = kReplace_Op + 1; + + // T + // [B N L R S] + // S + static constexpr int kRectRegionRuns = 7; + + struct RunHead; + + static RunHead* emptyRunHeadPtr() { return (SkRegion::RunHead*) -1; } + static constexpr RunHead* kRectRunHeadPtr = nullptr; + + // allocate space for count runs + void allocateRuns(int count); + void allocateRuns(int count, int ySpanCount, int intervalCount); + void allocateRuns(const RunHead& src); + + SkDEBUGCODE(void dump() const;) + + SkIRect fBounds; + RunHead* fRunHead; + + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + + void freeRuns(); + + /** + * Return the runs from this region, consing up fake runs if the region + * is empty or a rect. In those 2 cases, we use tmpStorage to hold the + * run data. + */ + const RunType* getRuns(RunType tmpStorage[], int* intervals) const; + + // This is called with runs[] that do not yet have their interval-count + // field set on each scanline. That is computed as part of this call + // (inside ComputeRunBounds). + bool setRuns(RunType runs[], int count); + + int count_runtype_values(int* itop, int* ibot) const; + + bool isValid() const; + + static void BuildRectRuns(const SkIRect& bounds, + RunType runs[kRectRegionRuns]); + + // If the runs define a simple rect, return true and set bounds to that + // rect. If not, return false and ignore bounds. + static bool RunsAreARect(const SkRegion::RunType runs[], int count, + SkIRect* bounds); + + /** + * If the last arg is null, just return if the result is non-empty, + * else store the result in the last arg. + */ + static bool Oper(const SkRegion&, const SkRegion&, SkRegion::Op, SkRegion*); + + friend struct RunHead; + friend class Iterator; + friend class Spanerator; + friend class SkRegionPriv; + friend class SkRgnBuilder; + friend class SkFlatRegion; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkSamplingOptions.h b/gfx/skia/skia/include/core/SkSamplingOptions.h new file mode 100644 index 0000000000..24b6d51659 --- /dev/null +++ b/gfx/skia/skia/include/core/SkSamplingOptions.h @@ -0,0 +1,105 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageSampling_DEFINED +#define SkImageSampling_DEFINED + +#include "include/core/SkTypes.h" + +#include +#include + +enum class SkFilterMode { + kNearest, // single sample point (nearest neighbor) + kLinear, // interporate between 2x2 sample points (bilinear interpolation) + + kLast = kLinear, +}; +static constexpr int kSkFilterModeCount = static_cast(SkFilterMode::kLast) + 1; + +enum class SkMipmapMode { + kNone, // ignore mipmap levels, sample from the "base" + kNearest, // sample from the nearest level + kLinear, // interpolate between the two nearest levels + + kLast = kLinear, +}; +static constexpr int kSkMipmapModeCount = static_cast(SkMipmapMode::kLast) + 1; + +/* + * Specify B and C (each between 0...1) to create a shader that applies the corresponding + * cubic reconstruction filter to the image. + * + * Example values: + * B = 1/3, C = 1/3 "Mitchell" filter + * B = 0, C = 1/2 "Catmull-Rom" filter + * + * See "Reconstruction Filters in Computer Graphics" + * Don P. Mitchell + * Arun N. Netravali + * 1988 + * https://www.cs.utexas.edu/~fussell/courses/cs384g-fall2013/lectures/mitchell/Mitchell.pdf + * + * Desmos worksheet https://www.desmos.com/calculator/aghdpicrvr + * Nice overview https://entropymine.com/imageworsener/bicubic/ + */ +struct SkCubicResampler { + float B, C; + + // Historic default for kHigh_SkFilterQuality + static constexpr SkCubicResampler Mitchell() { return {1/3.0f, 1/3.0f}; } + static constexpr SkCubicResampler CatmullRom() { return {0.0f, 1/2.0f}; } +}; + +struct SK_API SkSamplingOptions { + const int maxAniso = 0; + const bool useCubic = false; + const SkCubicResampler cubic = {0, 0}; + const SkFilterMode filter = SkFilterMode::kNearest; + const SkMipmapMode mipmap = SkMipmapMode::kNone; + + constexpr SkSamplingOptions() = default; + SkSamplingOptions(const SkSamplingOptions&) = default; + SkSamplingOptions& operator=(const SkSamplingOptions& that) { + this->~SkSamplingOptions(); // A pedantic no-op. + new (this) SkSamplingOptions(that); + return *this; + } + + constexpr SkSamplingOptions(SkFilterMode fm, SkMipmapMode mm) + : filter(fm) + , mipmap(mm) {} + + explicit constexpr SkSamplingOptions(SkFilterMode fm) + : filter(fm) + , mipmap(SkMipmapMode::kNone) {} + + explicit constexpr SkSamplingOptions(const SkCubicResampler& c) + : useCubic(true) + , cubic(c) {} + + static constexpr SkSamplingOptions Aniso(int maxAniso) { + return SkSamplingOptions{std::max(maxAniso, 1)}; + } + + bool operator==(const SkSamplingOptions& other) const { + return maxAniso == other.maxAniso + && useCubic == other.useCubic + && cubic.B == other.cubic.B + && cubic.C == other.cubic.C + && filter == other.filter + && mipmap == other.mipmap; + } + bool operator!=(const SkSamplingOptions& other) const { return !(*this == other); } + + bool isAniso() const { return maxAniso != 0; } + +private: + constexpr SkSamplingOptions(int maxAniso) : maxAniso(maxAniso) {} +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkScalar.h b/gfx/skia/skia/include/core/SkScalar.h new file mode 100644 index 0000000000..f3e11b34c2 --- /dev/null +++ b/gfx/skia/skia/include/core/SkScalar.h @@ -0,0 +1,173 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkScalar_DEFINED +#define SkScalar_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFloatingPoint.h" + +typedef float SkScalar; + +#define SK_Scalar1 1.0f +#define SK_ScalarHalf 0.5f +#define SK_ScalarSqrt2 SK_FloatSqrt2 +#define SK_ScalarPI SK_FloatPI +#define SK_ScalarTanPIOver8 0.414213562f +#define SK_ScalarRoot2Over2 0.707106781f +#define SK_ScalarMax 3.402823466e+38f +#define SK_ScalarMin (-SK_ScalarMax) +#define SK_ScalarInfinity SK_FloatInfinity +#define SK_ScalarNegativeInfinity SK_FloatNegativeInfinity +#define SK_ScalarNaN SK_FloatNaN + +#define SkScalarFloorToScalar(x) sk_float_floor(x) +#define SkScalarCeilToScalar(x) sk_float_ceil(x) +#define SkScalarRoundToScalar(x) sk_float_round(x) +#define SkScalarTruncToScalar(x) sk_float_trunc(x) + +#define SkScalarFloorToInt(x) sk_float_floor2int(x) +#define SkScalarCeilToInt(x) sk_float_ceil2int(x) +#define SkScalarRoundToInt(x) sk_float_round2int(x) + +#define SkScalarAbs(x) sk_float_abs(x) +#define SkScalarCopySign(x, y) sk_float_copysign(x, y) +#define SkScalarMod(x, y) sk_float_mod(x,y) +#define SkScalarSqrt(x) sk_float_sqrt(x) +#define SkScalarPow(b, e) sk_float_pow(b, e) + +#define SkScalarSin(radians) (float)sk_float_sin(radians) +#define SkScalarCos(radians) (float)sk_float_cos(radians) +#define SkScalarTan(radians) (float)sk_float_tan(radians) +#define SkScalarASin(val) (float)sk_float_asin(val) +#define SkScalarACos(val) (float)sk_float_acos(val) +#define SkScalarATan2(y, x) (float)sk_float_atan2(y,x) +#define SkScalarExp(x) (float)sk_float_exp(x) +#define SkScalarLog(x) (float)sk_float_log(x) +#define SkScalarLog2(x) (float)sk_float_log2(x) + +////////////////////////////////////////////////////////////////////////////////////////////////// + +#define SkIntToScalar(x) static_cast(x) +#define SkIntToFloat(x) static_cast(x) +#define SkScalarTruncToInt(x) sk_float_saturate2int(x) + +#define SkScalarToFloat(x) static_cast(x) +#define SkFloatToScalar(x) static_cast(x) +#define SkScalarToDouble(x) static_cast(x) +#define SkDoubleToScalar(x) sk_double_to_float(x) + +static inline bool SkScalarIsNaN(SkScalar x) { return x != x; } + +/** Returns true if x is not NaN and not infinite + */ +static inline bool SkScalarIsFinite(SkScalar x) { return sk_float_isfinite(x); } + +static inline bool SkScalarsAreFinite(SkScalar a, SkScalar b) { + return sk_floats_are_finite(a, b); +} + +static inline bool SkScalarsAreFinite(const SkScalar array[], int count) { + return sk_floats_are_finite(array, count); +} + +/** Returns the fractional part of the scalar. */ +static inline SkScalar SkScalarFraction(SkScalar x) { + return x - SkScalarTruncToScalar(x); +} + +static inline SkScalar SkScalarSquare(SkScalar x) { return x * x; } + +#define SkScalarInvert(x) sk_ieee_float_divide_TODO_IS_DIVIDE_BY_ZERO_SAFE_HERE(SK_Scalar1, (x)) +#define SkScalarAve(a, b) (((a) + (b)) * SK_ScalarHalf) +#define SkScalarHalf(a) ((a) * SK_ScalarHalf) + +#define SkDegreesToRadians(degrees) ((degrees) * (SK_ScalarPI / 180)) +#define SkRadiansToDegrees(radians) ((radians) * (180 / SK_ScalarPI)) + +static inline bool SkScalarIsInt(SkScalar x) { + return x == SkScalarFloorToScalar(x); +} + +/** + * Returns -1 || 0 || 1 depending on the sign of value: + * -1 if x < 0 + * 0 if x == 0 + * 1 if x > 0 + */ +static inline int SkScalarSignAsInt(SkScalar x) { + return x < 0 ? -1 : (x > 0); +} + +// Scalar result version of above +static inline SkScalar SkScalarSignAsScalar(SkScalar x) { + return x < 0 ? -SK_Scalar1 : ((x > 0) ? SK_Scalar1 : 0); +} + +#define SK_ScalarNearlyZero (SK_Scalar1 / (1 << 12)) + +static inline bool SkScalarNearlyZero(SkScalar x, + SkScalar tolerance = SK_ScalarNearlyZero) { + SkASSERT(tolerance >= 0); + return SkScalarAbs(x) <= tolerance; +} + +static inline bool SkScalarNearlyEqual(SkScalar x, SkScalar y, + SkScalar tolerance = SK_ScalarNearlyZero) { + SkASSERT(tolerance >= 0); + return SkScalarAbs(x-y) <= tolerance; +} + +#define SK_ScalarSinCosNearlyZero (SK_Scalar1 / (1 << 16)) + +static inline float SkScalarSinSnapToZero(SkScalar radians) { + float v = SkScalarSin(radians); + return SkScalarNearlyZero(v, SK_ScalarSinCosNearlyZero) ? 0.0f : v; +} + +static inline float SkScalarCosSnapToZero(SkScalar radians) { + float v = SkScalarCos(radians); + return SkScalarNearlyZero(v, SK_ScalarSinCosNearlyZero) ? 0.0f : v; +} + +/** Linearly interpolate between A and B, based on t. + If t is 0, return A + If t is 1, return B + else interpolate. + t must be [0..SK_Scalar1] +*/ +static inline SkScalar SkScalarInterp(SkScalar A, SkScalar B, SkScalar t) { + SkASSERT(t >= 0 && t <= SK_Scalar1); + return A + (B - A) * t; +} + +/** Interpolate along the function described by (keys[length], values[length]) + for the passed searchKey. SearchKeys outside the range keys[0]-keys[Length] + clamp to the min or max value. This function assumes the number of pairs + (length) will be small and a linear search is used. + + Repeated keys are allowed for discontinuous functions (so long as keys is + monotonically increasing). If key is the value of a repeated scalar in + keys the first one will be used. +*/ +SkScalar SkScalarInterpFunc(SkScalar searchKey, const SkScalar keys[], + const SkScalar values[], int length); + +/* + * Helper to compare an array of scalars. + */ +static inline bool SkScalarsEqual(const SkScalar a[], const SkScalar b[], int n) { + SkASSERT(n >= 0); + for (int i = 0; i < n; ++i) { + if (a[i] != b[i]) { + return false; + } + } + return true; +} + +#endif diff --git a/gfx/skia/skia/include/core/SkSerialProcs.h b/gfx/skia/skia/include/core/SkSerialProcs.h new file mode 100644 index 0000000000..87e10d847c --- /dev/null +++ b/gfx/skia/skia/include/core/SkSerialProcs.h @@ -0,0 +1,73 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSerialProcs_DEFINED +#define SkSerialProcs_DEFINED + +#include "include/core/SkImage.h" +#include "include/core/SkPicture.h" +#include "include/core/SkTypeface.h" + +/** + * A serial-proc is asked to serialize the specified object (e.g. picture or image). + * If a data object is returned, it will be used (even if it is zero-length). + * If null is returned, then Skia will take its default action. + * + * The default action for pictures is to use Skia's internal format. + * The default action for images is to encode either in its native format or PNG. + * The default action for typefaces is to use Skia's internal format. + */ + +typedef sk_sp (*SkSerialPictureProc)(SkPicture*, void* ctx); +typedef sk_sp (*SkSerialImageProc)(SkImage*, void* ctx); +typedef sk_sp (*SkSerialTypefaceProc)(SkTypeface*, void* ctx); + +/** + * Called with the encoded form of a picture (previously written with a custom + * SkSerialPictureProc proc). Return a picture object, or nullptr indicating failure. + */ +typedef sk_sp (*SkDeserialPictureProc)(const void* data, size_t length, void* ctx); + +/** + * Called with the encoded from of an image. The proc can return an image object, or if it + * returns nullptr, then Skia will take its default action to try to create an image from the data. + * + * Note that unlike SkDeserialPictureProc and SkDeserialTypefaceProc, return nullptr from this + * does not indicate failure, but is a signal for Skia to take its default action. + */ +typedef sk_sp (*SkDeserialImageProc)(const void* data, size_t length, void* ctx); + +/** + * Called with the encoded form of a typeface (previously written with a custom + * SkSerialTypefaceProc proc). Return a typeface object, or nullptr indicating failure. + */ +typedef sk_sp (*SkDeserialTypefaceProc)(const void* data, size_t length, void* ctx); + +struct SK_API SkSerialProcs { + SkSerialPictureProc fPictureProc = nullptr; + void* fPictureCtx = nullptr; + + SkSerialImageProc fImageProc = nullptr; + void* fImageCtx = nullptr; + + SkSerialTypefaceProc fTypefaceProc = nullptr; + void* fTypefaceCtx = nullptr; +}; + +struct SK_API SkDeserialProcs { + SkDeserialPictureProc fPictureProc = nullptr; + void* fPictureCtx = nullptr; + + SkDeserialImageProc fImageProc = nullptr; + void* fImageCtx = nullptr; + + SkDeserialTypefaceProc fTypefaceProc = nullptr; + void* fTypefaceCtx = nullptr; +}; + +#endif + diff --git a/gfx/skia/skia/include/core/SkShader.h b/gfx/skia/skia/include/core/SkShader.h new file mode 100644 index 0000000000..be42a87b9a --- /dev/null +++ b/gfx/skia/skia/include/core/SkShader.h @@ -0,0 +1,93 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkShader_DEFINED +#define SkShader_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkTileMode.h" + +class SkArenaAlloc; +class SkBitmap; +class SkBlender; +class SkColorFilter; +class SkColorSpace; +class SkImage; +class SkPath; +class SkPicture; +class SkRasterPipeline; +class GrFragmentProcessor; + +/** \class SkShader + * + * Shaders specify the source color(s) for what is being drawn. If a paint + * has no shader, then the paint's color is used. If the paint has a + * shader, then the shader's color(s) are use instead, but they are + * modulated by the paint's alpha. This makes it easy to create a shader + * once (e.g. bitmap tiling or gradient) and then change its transparency + * w/o having to modify the original shader... only the paint's alpha needs + * to be modified. + */ +class SK_API SkShader : public SkFlattenable { +public: + /** + * Returns true if the shader is guaranteed to produce only opaque + * colors, subject to the SkPaint using the shader to apply an opaque + * alpha value. Subclasses should override this to allow some + * optimizations. + */ + virtual bool isOpaque() const { return false; } + + /** + * Iff this shader is backed by a single SkImage, return its ptr (the caller must ref this + * if they want to keep it longer than the lifetime of the shader). If not, return nullptr. + */ + SkImage* isAImage(SkMatrix* localMatrix, SkTileMode xy[2]) const; + + bool isAImage() const { + return this->isAImage(nullptr, (SkTileMode*)nullptr) != nullptr; + } + + ////////////////////////////////////////////////////////////////////////// + // Methods to create combinations or variants of shaders + + /** + * Return a shader that will apply the specified localMatrix to this shader. + * The specified matrix will be applied before any matrix associated with this shader. + */ + sk_sp makeWithLocalMatrix(const SkMatrix&) const; + + /** + * Create a new shader that produces the same colors as invoking this shader and then applying + * the colorfilter. + */ + sk_sp makeWithColorFilter(sk_sp) const; + +private: + SkShader() = default; + friend class SkShaderBase; + + using INHERITED = SkFlattenable; +}; + +class SK_API SkShaders { +public: + static sk_sp Empty(); + static sk_sp Color(SkColor); + static sk_sp Color(const SkColor4f&, sk_sp); + static sk_sp Blend(SkBlendMode mode, sk_sp dst, sk_sp src); + static sk_sp Blend(sk_sp, sk_sp dst, sk_sp src); + static sk_sp CoordClamp(sk_sp, const SkRect& subset); +private: + SkShaders() = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkSize.h b/gfx/skia/skia/include/core/SkSize.h new file mode 100644 index 0000000000..867f4eeb97 --- /dev/null +++ b/gfx/skia/skia/include/core/SkSize.h @@ -0,0 +1,92 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSize_DEFINED +#define SkSize_DEFINED + +#include "include/core/SkScalar.h" + +#include + +struct SkISize { + int32_t fWidth; + int32_t fHeight; + + static constexpr SkISize Make(int32_t w, int32_t h) { return {w, h}; } + + static constexpr SkISize MakeEmpty() { return {0, 0}; } + + void set(int32_t w, int32_t h) { *this = SkISize{w, h}; } + + /** Returns true iff fWidth == 0 && fHeight == 0 + */ + bool isZero() const { return 0 == fWidth && 0 == fHeight; } + + /** Returns true if either width or height are <= 0 */ + bool isEmpty() const { return fWidth <= 0 || fHeight <= 0; } + + /** Set the width and height to 0 */ + void setEmpty() { fWidth = fHeight = 0; } + + constexpr int32_t width() const { return fWidth; } + constexpr int32_t height() const { return fHeight; } + + constexpr int64_t area() const { return fWidth * fHeight; } + + bool equals(int32_t w, int32_t h) const { return fWidth == w && fHeight == h; } +}; + +static inline bool operator==(const SkISize& a, const SkISize& b) { + return a.fWidth == b.fWidth && a.fHeight == b.fHeight; +} + +static inline bool operator!=(const SkISize& a, const SkISize& b) { return !(a == b); } + +/////////////////////////////////////////////////////////////////////////////// + +struct SkSize { + SkScalar fWidth; + SkScalar fHeight; + + static SkSize Make(SkScalar w, SkScalar h) { return {w, h}; } + + static SkSize Make(const SkISize& src) { + return {SkIntToScalar(src.width()), SkIntToScalar(src.height())}; + } + + static SkSize MakeEmpty() { return {0, 0}; } + + void set(SkScalar w, SkScalar h) { *this = SkSize{w, h}; } + + /** Returns true iff fWidth == 0 && fHeight == 0 + */ + bool isZero() const { return 0 == fWidth && 0 == fHeight; } + + /** Returns true if either width or height are <= 0 */ + bool isEmpty() const { return fWidth <= 0 || fHeight <= 0; } + + /** Set the width and height to 0 */ + void setEmpty() { *this = SkSize{0, 0}; } + + SkScalar width() const { return fWidth; } + SkScalar height() const { return fHeight; } + + bool equals(SkScalar w, SkScalar h) const { return fWidth == w && fHeight == h; } + + SkISize toRound() const { return {SkScalarRoundToInt(fWidth), SkScalarRoundToInt(fHeight)}; } + + SkISize toCeil() const { return {SkScalarCeilToInt(fWidth), SkScalarCeilToInt(fHeight)}; } + + SkISize toFloor() const { return {SkScalarFloorToInt(fWidth), SkScalarFloorToInt(fHeight)}; } +}; + +static inline bool operator==(const SkSize& a, const SkSize& b) { + return a.fWidth == b.fWidth && a.fHeight == b.fHeight; +} + +static inline bool operator!=(const SkSize& a, const SkSize& b) { return !(a == b); } +#endif diff --git a/gfx/skia/skia/include/core/SkSpan.h b/gfx/skia/skia/include/core/SkSpan.h new file mode 100644 index 0000000000..37cac632b1 --- /dev/null +++ b/gfx/skia/skia/include/core/SkSpan.h @@ -0,0 +1,13 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// We want SkSpan to be a public API, but it is also fundamental to many of our internal types. +// Thus, we have a public file that clients can include. This file defers to the private copy +// so we do not have a dependency cycle from our "base" files to our "core" files. + +#include "include/private/base/SkSpan_impl.h" // IWYU pragma: export + diff --git a/gfx/skia/skia/include/core/SkStream.h b/gfx/skia/skia/include/core/SkStream.h new file mode 100644 index 0000000000..c582c80a05 --- /dev/null +++ b/gfx/skia/skia/include/core/SkStream.h @@ -0,0 +1,523 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStream_DEFINED +#define SkStream_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkTo.h" + +#include +#include +#include +#include +#include +class SkStreamAsset; + +/** + * SkStream -- abstraction for a source of bytes. Subclasses can be backed by + * memory, or a file, or something else. + * + * NOTE: + * + * Classic "streams" APIs are sort of async, in that on a request for N + * bytes, they may return fewer than N bytes on a given call, in which case + * the caller can "try again" to get more bytes, eventually (modulo an error) + * receiving their total N bytes. + * + * Skia streams behave differently. They are effectively synchronous, and will + * always return all N bytes of the request if possible. If they return fewer + * (the read() call returns the number of bytes read) then that means there is + * no more data (at EOF or hit an error). The caller should *not* call again + * in hopes of fulfilling more of the request. + */ +class SK_API SkStream { +public: + virtual ~SkStream() {} + SkStream() {} + + /** + * Attempts to open the specified file as a stream, returns nullptr on failure. + */ + static std::unique_ptr MakeFromFile(const char path[]); + + /** Reads or skips size number of bytes. + * If buffer == NULL, skip size bytes, return how many were skipped. + * If buffer != NULL, copy size bytes into buffer, return how many were copied. + * @param buffer when NULL skip size bytes, otherwise copy size bytes into buffer + * @param size the number of bytes to skip or copy + * @return the number of bytes actually read. + */ + virtual size_t read(void* buffer, size_t size) = 0; + + /** Skip size number of bytes. + * @return the actual number bytes that could be skipped. + */ + size_t skip(size_t size) { + return this->read(nullptr, size); + } + + /** + * Attempt to peek at size bytes. + * If this stream supports peeking, copy min(size, peekable bytes) into + * buffer, and return the number of bytes copied. + * If the stream does not support peeking, or cannot peek any bytes, + * return 0 and leave buffer unchanged. + * The stream is guaranteed to be in the same visible state after this + * call, regardless of success or failure. + * @param buffer Must not be NULL, and must be at least size bytes. Destination + * to copy bytes. + * @param size Number of bytes to copy. + * @return The number of bytes peeked/copied. + */ + virtual size_t peek(void* /*buffer*/, size_t /*size*/) const { return 0; } + + /** Returns true when all the bytes in the stream have been read. + * This may return true early (when there are no more bytes to be read) + * or late (after the first unsuccessful read). + */ + virtual bool isAtEnd() const = 0; + + bool SK_WARN_UNUSED_RESULT readS8(int8_t*); + bool SK_WARN_UNUSED_RESULT readS16(int16_t*); + bool SK_WARN_UNUSED_RESULT readS32(int32_t*); + + bool SK_WARN_UNUSED_RESULT readU8(uint8_t* i) { return this->readS8((int8_t*)i); } + bool SK_WARN_UNUSED_RESULT readU16(uint16_t* i) { return this->readS16((int16_t*)i); } + bool SK_WARN_UNUSED_RESULT readU32(uint32_t* i) { return this->readS32((int32_t*)i); } + + bool SK_WARN_UNUSED_RESULT readBool(bool* b) { + uint8_t i; + if (!this->readU8(&i)) { return false; } + *b = (i != 0); + return true; + } + bool SK_WARN_UNUSED_RESULT readScalar(SkScalar*); + bool SK_WARN_UNUSED_RESULT readPackedUInt(size_t*); + +//SkStreamRewindable + /** Rewinds to the beginning of the stream. Returns true if the stream is known + * to be at the beginning after this call returns. + */ + virtual bool rewind() { return false; } + + /** Duplicates this stream. If this cannot be done, returns NULL. + * The returned stream will be positioned at the beginning of its data. + */ + std::unique_ptr duplicate() const { + return std::unique_ptr(this->onDuplicate()); + } + /** Duplicates this stream. If this cannot be done, returns NULL. + * The returned stream will be positioned the same as this stream. + */ + std::unique_ptr fork() const { + return std::unique_ptr(this->onFork()); + } + +//SkStreamSeekable + /** Returns true if this stream can report its current position. */ + virtual bool hasPosition() const { return false; } + /** Returns the current position in the stream. If this cannot be done, returns 0. */ + virtual size_t getPosition() const { return 0; } + + /** Seeks to an absolute position in the stream. If this cannot be done, returns false. + * If an attempt is made to seek past the end of the stream, the position will be set + * to the end of the stream. + */ + virtual bool seek(size_t /*position*/) { return false; } + + /** Seeks to an relative offset in the stream. If this cannot be done, returns false. + * If an attempt is made to move to a position outside the stream, the position will be set + * to the closest point within the stream (beginning or end). + */ + virtual bool move(long /*offset*/) { return false; } + +//SkStreamAsset + /** Returns true if this stream can report its total length. */ + virtual bool hasLength() const { return false; } + /** Returns the total length of the stream. If this cannot be done, returns 0. */ + virtual size_t getLength() const { return 0; } + +//SkStreamMemory + /** Returns the starting address for the data. If this cannot be done, returns NULL. */ + //TODO: replace with virtual const SkData* getData() + virtual const void* getMemoryBase() { return nullptr; } + +private: + virtual SkStream* onDuplicate() const { return nullptr; } + virtual SkStream* onFork() const { return nullptr; } + + SkStream(SkStream&&) = delete; + SkStream(const SkStream&) = delete; + SkStream& operator=(SkStream&&) = delete; + SkStream& operator=(const SkStream&) = delete; +}; + +/** SkStreamRewindable is a SkStream for which rewind and duplicate are required. */ +class SK_API SkStreamRewindable : public SkStream { +public: + bool rewind() override = 0; + std::unique_ptr duplicate() const { + return std::unique_ptr(this->onDuplicate()); + } +private: + SkStreamRewindable* onDuplicate() const override = 0; +}; + +/** SkStreamSeekable is a SkStreamRewindable for which position, seek, move, and fork are required. */ +class SK_API SkStreamSeekable : public SkStreamRewindable { +public: + std::unique_ptr duplicate() const { + return std::unique_ptr(this->onDuplicate()); + } + + bool hasPosition() const override { return true; } + size_t getPosition() const override = 0; + bool seek(size_t position) override = 0; + bool move(long offset) override = 0; + + std::unique_ptr fork() const { + return std::unique_ptr(this->onFork()); + } +private: + SkStreamSeekable* onDuplicate() const override = 0; + SkStreamSeekable* onFork() const override = 0; +}; + +/** SkStreamAsset is a SkStreamSeekable for which getLength is required. */ +class SK_API SkStreamAsset : public SkStreamSeekable { +public: + bool hasLength() const override { return true; } + size_t getLength() const override = 0; + + std::unique_ptr duplicate() const { + return std::unique_ptr(this->onDuplicate()); + } + std::unique_ptr fork() const { + return std::unique_ptr(this->onFork()); + } +private: + SkStreamAsset* onDuplicate() const override = 0; + SkStreamAsset* onFork() const override = 0; +}; + +/** SkStreamMemory is a SkStreamAsset for which getMemoryBase is required. */ +class SK_API SkStreamMemory : public SkStreamAsset { +public: + const void* getMemoryBase() override = 0; + + std::unique_ptr duplicate() const { + return std::unique_ptr(this->onDuplicate()); + } + std::unique_ptr fork() const { + return std::unique_ptr(this->onFork()); + } +private: + SkStreamMemory* onDuplicate() const override = 0; + SkStreamMemory* onFork() const override = 0; +}; + +class SK_API SkWStream { +public: + virtual ~SkWStream(); + SkWStream() {} + + /** Called to write bytes to a SkWStream. Returns true on success + @param buffer the address of at least size bytes to be written to the stream + @param size The number of bytes in buffer to write to the stream + @return true on success + */ + virtual bool write(const void* buffer, size_t size) = 0; + virtual void flush(); + + virtual size_t bytesWritten() const = 0; + + // helpers + + bool write8(U8CPU value) { + uint8_t v = SkToU8(value); + return this->write(&v, 1); + } + bool write16(U16CPU value) { + uint16_t v = SkToU16(value); + return this->write(&v, 2); + } + bool write32(uint32_t v) { + return this->write(&v, 4); + } + + bool writeText(const char text[]) { + SkASSERT(text); + return this->write(text, std::strlen(text)); + } + + bool newline() { return this->write("\n", std::strlen("\n")); } + + bool writeDecAsText(int32_t); + bool writeBigDecAsText(int64_t, int minDigits = 0); + bool writeHexAsText(uint32_t, int minDigits = 0); + bool writeScalarAsText(SkScalar); + + bool writeBool(bool v) { return this->write8(v); } + bool writeScalar(SkScalar); + bool writePackedUInt(size_t); + + bool writeStream(SkStream* input, size_t length); + + /** + * This returns the number of bytes in the stream required to store + * 'value'. + */ + static int SizeOfPackedUInt(size_t value); + +private: + SkWStream(const SkWStream&) = delete; + SkWStream& operator=(const SkWStream&) = delete; +}; + +class SK_API SkNullWStream : public SkWStream { +public: + SkNullWStream() : fBytesWritten(0) {} + + bool write(const void* , size_t n) override { fBytesWritten += n; return true; } + void flush() override {} + size_t bytesWritten() const override { return fBytesWritten; } + +private: + size_t fBytesWritten; +}; + +//////////////////////////////////////////////////////////////////////////////////////// + +/** A stream that wraps a C FILE* file stream. */ +class SK_API SkFILEStream : public SkStreamAsset { +public: + /** Initialize the stream by calling sk_fopen on the specified path. + * This internal stream will be closed in the destructor. + */ + explicit SkFILEStream(const char path[] = nullptr); + + /** Initialize the stream with an existing C FILE stream. + * The current position of the C FILE stream will be considered the + * beginning of the SkFILEStream and the current seek end of the FILE will be the end. + * The C FILE stream will be closed in the destructor. + */ + explicit SkFILEStream(FILE* file); + + /** Initialize the stream with an existing C FILE stream. + * The current position of the C FILE stream will be considered the + * beginning of the SkFILEStream and size bytes later will be the end. + * The C FILE stream will be closed in the destructor. + */ + explicit SkFILEStream(FILE* file, size_t size); + + ~SkFILEStream() override; + + static std::unique_ptr Make(const char path[]) { + std::unique_ptr stream(new SkFILEStream(path)); + return stream->isValid() ? std::move(stream) : nullptr; + } + + /** Returns true if the current path could be opened. */ + bool isValid() const { return fFILE != nullptr; } + + /** Close this SkFILEStream. */ + void close(); + + size_t read(void* buffer, size_t size) override; + bool isAtEnd() const override; + + bool rewind() override; + std::unique_ptr duplicate() const { + return std::unique_ptr(this->onDuplicate()); + } + + size_t getPosition() const override; + bool seek(size_t position) override; + bool move(long offset) override; + + std::unique_ptr fork() const { + return std::unique_ptr(this->onFork()); + } + + size_t getLength() const override; + +private: + explicit SkFILEStream(FILE*, size_t size, size_t start); + explicit SkFILEStream(std::shared_ptr, size_t end, size_t start); + explicit SkFILEStream(std::shared_ptr, size_t end, size_t start, size_t current); + + SkStreamAsset* onDuplicate() const override; + SkStreamAsset* onFork() const override; + + std::shared_ptr fFILE; + // My own council will I keep on sizes and offsets. + // These are seek positions in the underling FILE, not offsets into the stream. + size_t fEnd; + size_t fStart; + size_t fCurrent; + + using INHERITED = SkStreamAsset; +}; + +class SK_API SkMemoryStream : public SkStreamMemory { +public: + SkMemoryStream(); + + /** We allocate (and free) the memory. Write to it via getMemoryBase() */ + SkMemoryStream(size_t length); + + /** If copyData is true, the stream makes a private copy of the data. */ + SkMemoryStream(const void* data, size_t length, bool copyData = false); + + /** Creates the stream to read from the specified data */ + SkMemoryStream(sk_sp data); + + /** Returns a stream with a copy of the input data. */ + static std::unique_ptr MakeCopy(const void* data, size_t length); + + /** Returns a stream with a bare pointer reference to the input data. */ + static std::unique_ptr MakeDirect(const void* data, size_t length); + + /** Returns a stream with a shared reference to the input data. */ + static std::unique_ptr Make(sk_sp data); + + /** Resets the stream to the specified data and length, + just like the constructor. + if copyData is true, the stream makes a private copy of the data + */ + virtual void setMemory(const void* data, size_t length, + bool copyData = false); + /** Replace any memory buffer with the specified buffer. The caller + must have allocated data with sk_malloc or sk_realloc, since it + will be freed with sk_free. + */ + void setMemoryOwned(const void* data, size_t length); + + sk_sp asData() const { return fData; } + void setData(sk_sp data); + + void skipToAlign4(); + const void* getAtPos(); + + size_t read(void* buffer, size_t size) override; + bool isAtEnd() const override; + + size_t peek(void* buffer, size_t size) const override; + + bool rewind() override; + + std::unique_ptr duplicate() const { + return std::unique_ptr(this->onDuplicate()); + } + + size_t getPosition() const override; + bool seek(size_t position) override; + bool move(long offset) override; + + std::unique_ptr fork() const { + return std::unique_ptr(this->onFork()); + } + + size_t getLength() const override; + + const void* getMemoryBase() override; + +private: + SkMemoryStream* onDuplicate() const override; + SkMemoryStream* onFork() const override; + + sk_sp fData; + size_t fOffset; + + using INHERITED = SkStreamMemory; +}; + +///////////////////////////////////////////////////////////////////////////////////////////// + +class SK_API SkFILEWStream : public SkWStream { +public: + SkFILEWStream(const char path[]); + ~SkFILEWStream() override; + + /** Returns true if the current path could be opened. + */ + bool isValid() const { return fFILE != nullptr; } + + bool write(const void* buffer, size_t size) override; + void flush() override; + void fsync(); + size_t bytesWritten() const override; + +private: + FILE* fFILE; + + using INHERITED = SkWStream; +}; + +class SK_API SkDynamicMemoryWStream : public SkWStream { +public: + SkDynamicMemoryWStream() = default; + SkDynamicMemoryWStream(SkDynamicMemoryWStream&&); + SkDynamicMemoryWStream& operator=(SkDynamicMemoryWStream&&); + ~SkDynamicMemoryWStream() override; + + bool write(const void* buffer, size_t size) override; + size_t bytesWritten() const override; + + bool read(void* buffer, size_t offset, size_t size); + + /** More efficient version of read(dst, 0, bytesWritten()). */ + void copyTo(void* dst) const; + bool writeToStream(SkWStream* dst) const; + + /** Equivalent to copyTo() followed by reset(), but may save memory use. */ + void copyToAndReset(void* dst); + + /** Equivalent to writeToStream() followed by reset(), but may save memory use. */ + bool writeToAndReset(SkWStream* dst); + + /** Equivalent to writeToStream() followed by reset(), but may save memory use. + When the dst is also a SkDynamicMemoryWStream, the implementation is constant time. */ + bool writeToAndReset(SkDynamicMemoryWStream* dst); + + /** Prepend this stream to dst, resetting this. */ + void prependToAndReset(SkDynamicMemoryWStream* dst); + + /** Return the contents as SkData, and then reset the stream. */ + sk_sp detachAsData(); + + /** Reset, returning a reader stream with the current content. */ + std::unique_ptr detachAsStream(); + + /** Reset the stream to its original, empty, state. */ + void reset(); + void padToAlign4(); +private: + struct Block; + Block* fHead = nullptr; + Block* fTail = nullptr; + size_t fBytesWrittenBeforeTail = 0; + +#ifdef SK_DEBUG + void validate() const; +#else + void validate() const {} +#endif + + // For access to the Block type. + friend class SkBlockMemoryStream; + friend class SkBlockMemoryRefCnt; + + using INHERITED = SkWStream; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkString.h b/gfx/skia/skia/include/core/SkString.h new file mode 100644 index 0000000000..1b27fbf44b --- /dev/null +++ b/gfx/skia/skia/include/core/SkString.h @@ -0,0 +1,291 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkString_DEFINED +#define SkString_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" +#include "include/private/base/SkTypeTraits.h" + +#include +#include +#include +#include +#include +#include +#include + +/* Some helper functions for C strings */ +static inline bool SkStrStartsWith(const char string[], const char prefixStr[]) { + SkASSERT(string); + SkASSERT(prefixStr); + return !strncmp(string, prefixStr, strlen(prefixStr)); +} +static inline bool SkStrStartsWith(const char string[], const char prefixChar) { + SkASSERT(string); + return (prefixChar == *string); +} + +bool SkStrEndsWith(const char string[], const char suffixStr[]); +bool SkStrEndsWith(const char string[], const char suffixChar); + +int SkStrStartsWithOneOf(const char string[], const char prefixes[]); + +static inline int SkStrFind(const char string[], const char substring[]) { + const char *first = strstr(string, substring); + if (nullptr == first) return -1; + return SkToInt(first - &string[0]); +} + +static inline int SkStrFindLastOf(const char string[], const char subchar) { + const char* last = strrchr(string, subchar); + if (nullptr == last) return -1; + return SkToInt(last - &string[0]); +} + +static inline bool SkStrContains(const char string[], const char substring[]) { + SkASSERT(string); + SkASSERT(substring); + return (-1 != SkStrFind(string, substring)); +} +static inline bool SkStrContains(const char string[], const char subchar) { + SkASSERT(string); + char tmp[2]; + tmp[0] = subchar; + tmp[1] = '\0'; + return (-1 != SkStrFind(string, tmp)); +} + +/* + * The SkStrAppend... methods will write into the provided buffer, assuming it is large enough. + * Each method has an associated const (e.g. kSkStrAppendU32_MaxSize) which will be the largest + * value needed for that method's buffer. + * + * char storage[kSkStrAppendU32_MaxSize]; + * SkStrAppendU32(storage, value); + * + * Note : none of the SkStrAppend... methods write a terminating 0 to their buffers. Instead, + * the methods return the ptr to the end of the written part of the buffer. This can be used + * to compute the length, and/or know where to write a 0 if that is desired. + * + * char storage[kSkStrAppendU32_MaxSize + 1]; + * char* stop = SkStrAppendU32(storage, value); + * size_t len = stop - storage; + * *stop = 0; // valid, since storage was 1 byte larger than the max. + */ + +static constexpr int kSkStrAppendU32_MaxSize = 10; +char* SkStrAppendU32(char buffer[], uint32_t); +static constexpr int kSkStrAppendU64_MaxSize = 20; +char* SkStrAppendU64(char buffer[], uint64_t, int minDigits); + +static constexpr int kSkStrAppendS32_MaxSize = kSkStrAppendU32_MaxSize + 1; +char* SkStrAppendS32(char buffer[], int32_t); +static constexpr int kSkStrAppendS64_MaxSize = kSkStrAppendU64_MaxSize + 1; +char* SkStrAppendS64(char buffer[], int64_t, int minDigits); + +/** + * Floats have at most 8 significant digits, so we limit our %g to that. + * However, the total string could be 15 characters: -1.2345678e-005 + * + * In theory we should only expect up to 2 digits for the exponent, but on + * some platforms we have seen 3 (as in the example above). + */ +static constexpr int kSkStrAppendScalar_MaxSize = 15; + +/** + * Write the scalar in decimal format into buffer, and return a pointer to + * the next char after the last one written. Note: a terminating 0 is not + * written into buffer, which must be at least kSkStrAppendScalar_MaxSize. + * Thus if the caller wants to add a 0 at the end, buffer must be at least + * kSkStrAppendScalar_MaxSize + 1 bytes large. + */ +char* SkStrAppendScalar(char buffer[], SkScalar); + +/** \class SkString + + Light weight class for managing strings. Uses reference + counting to make string assignments and copies very fast + with no extra RAM cost. Assumes UTF8 encoding. +*/ +class SK_API SkString { +public: + SkString(); + explicit SkString(size_t len); + explicit SkString(const char text[]); + SkString(const char text[], size_t len); + SkString(const SkString&); + SkString(SkString&&); + explicit SkString(const std::string&); + explicit SkString(std::string_view); + ~SkString(); + + bool isEmpty() const { return 0 == fRec->fLength; } + size_t size() const { return (size_t) fRec->fLength; } + const char* data() const { return fRec->data(); } + const char* c_str() const { return fRec->data(); } + char operator[](size_t n) const { return this->c_str()[n]; } + + bool equals(const SkString&) const; + bool equals(const char text[]) const; + bool equals(const char text[], size_t len) const; + + bool startsWith(const char prefixStr[]) const { + return SkStrStartsWith(fRec->data(), prefixStr); + } + bool startsWith(const char prefixChar) const { + return SkStrStartsWith(fRec->data(), prefixChar); + } + bool endsWith(const char suffixStr[]) const { + return SkStrEndsWith(fRec->data(), suffixStr); + } + bool endsWith(const char suffixChar) const { + return SkStrEndsWith(fRec->data(), suffixChar); + } + bool contains(const char substring[]) const { + return SkStrContains(fRec->data(), substring); + } + bool contains(const char subchar) const { + return SkStrContains(fRec->data(), subchar); + } + int find(const char substring[]) const { + return SkStrFind(fRec->data(), substring); + } + int findLastOf(const char subchar) const { + return SkStrFindLastOf(fRec->data(), subchar); + } + + friend bool operator==(const SkString& a, const SkString& b) { + return a.equals(b); + } + friend bool operator!=(const SkString& a, const SkString& b) { + return !a.equals(b); + } + + // these methods edit the string + + SkString& operator=(const SkString&); + SkString& operator=(SkString&&); + SkString& operator=(const char text[]); + + char* data(); + char& operator[](size_t n) { return this->data()[n]; } + + void reset(); + /** String contents are preserved on resize. (For destructive resize, `set(nullptr, length)`.) + * `resize` automatically reserves an extra byte at the end of the buffer for a null terminator. + */ + void resize(size_t len); + void set(const SkString& src) { *this = src; } + void set(const char text[]); + void set(const char text[], size_t len); + void set(std::string_view str) { this->set(str.data(), str.size()); } + + void insert(size_t offset, const char text[]); + void insert(size_t offset, const char text[], size_t len); + void insert(size_t offset, const SkString& str) { this->insert(offset, str.c_str(), str.size()); } + void insert(size_t offset, std::string_view str) { this->insert(offset, str.data(), str.size()); } + void insertUnichar(size_t offset, SkUnichar); + void insertS32(size_t offset, int32_t value); + void insertS64(size_t offset, int64_t value, int minDigits = 0); + void insertU32(size_t offset, uint32_t value); + void insertU64(size_t offset, uint64_t value, int minDigits = 0); + void insertHex(size_t offset, uint32_t value, int minDigits = 0); + void insertScalar(size_t offset, SkScalar); + + void append(const char text[]) { this->insert((size_t)-1, text); } + void append(const char text[], size_t len) { this->insert((size_t)-1, text, len); } + void append(const SkString& str) { this->insert((size_t)-1, str.c_str(), str.size()); } + void append(std::string_view str) { this->insert((size_t)-1, str.data(), str.size()); } + void appendUnichar(SkUnichar uni) { this->insertUnichar((size_t)-1, uni); } + void appendS32(int32_t value) { this->insertS32((size_t)-1, value); } + void appendS64(int64_t value, int minDigits = 0) { this->insertS64((size_t)-1, value, minDigits); } + void appendU32(uint32_t value) { this->insertU32((size_t)-1, value); } + void appendU64(uint64_t value, int minDigits = 0) { this->insertU64((size_t)-1, value, minDigits); } + void appendHex(uint32_t value, int minDigits = 0) { this->insertHex((size_t)-1, value, minDigits); } + void appendScalar(SkScalar value) { this->insertScalar((size_t)-1, value); } + + void prepend(const char text[]) { this->insert(0, text); } + void prepend(const char text[], size_t len) { this->insert(0, text, len); } + void prepend(const SkString& str) { this->insert(0, str.c_str(), str.size()); } + void prepend(std::string_view str) { this->insert(0, str.data(), str.size()); } + void prependUnichar(SkUnichar uni) { this->insertUnichar(0, uni); } + void prependS32(int32_t value) { this->insertS32(0, value); } + void prependS64(int32_t value, int minDigits = 0) { this->insertS64(0, value, minDigits); } + void prependHex(uint32_t value, int minDigits = 0) { this->insertHex(0, value, minDigits); } + void prependScalar(SkScalar value) { this->insertScalar((size_t)-1, value); } + + void printf(const char format[], ...) SK_PRINTF_LIKE(2, 3); + void printVAList(const char format[], va_list) SK_PRINTF_LIKE(2, 0); + void appendf(const char format[], ...) SK_PRINTF_LIKE(2, 3); + void appendVAList(const char format[], va_list) SK_PRINTF_LIKE(2, 0); + void prependf(const char format[], ...) SK_PRINTF_LIKE(2, 3); + void prependVAList(const char format[], va_list) SK_PRINTF_LIKE(2, 0); + + void remove(size_t offset, size_t length); + + SkString& operator+=(const SkString& s) { this->append(s); return *this; } + SkString& operator+=(const char text[]) { this->append(text); return *this; } + SkString& operator+=(const char c) { this->append(&c, 1); return *this; } + + /** + * Swap contents between this and other. This function is guaranteed + * to never fail or throw. + */ + void swap(SkString& other); + + using sk_is_trivially_relocatable = std::true_type; + +private: + struct Rec { + public: + constexpr Rec(uint32_t len, int32_t refCnt) : fLength(len), fRefCnt(refCnt) {} + static sk_sp Make(const char text[], size_t len); + char* data() { return fBeginningOfData; } + const char* data() const { return fBeginningOfData; } + void ref() const; + void unref() const; + bool unique() const; +#ifdef SK_DEBUG + int32_t getRefCnt() const; +#endif + uint32_t fLength; // logically size_t, but we want it to stay 32 bits + + private: + mutable std::atomic fRefCnt; + char fBeginningOfData[1] = {'\0'}; + + // Ensure the unsized delete is called. + void operator delete(void* p) { ::operator delete(p); } + }; + sk_sp fRec; + + static_assert(::sk_is_trivially_relocatable::value); + +#ifdef SK_DEBUG + const SkString& validate() const; +#else + const SkString& validate() const { return *this; } +#endif + + static const Rec gEmptyRec; +}; + +/// Creates a new string and writes into it using a printf()-style format. +SkString SkStringPrintf(const char* format, ...) SK_PRINTF_LIKE(1, 2); +/// This makes it easier to write a caller as a VAR_ARGS function where the format string is +/// optional. +static inline SkString SkStringPrintf() { return SkString(); } + +static inline void swap(SkString& a, SkString& b) { + a.swap(b); +} + +#endif diff --git a/gfx/skia/skia/include/core/SkStrokeRec.h b/gfx/skia/skia/include/core/SkStrokeRec.h new file mode 100644 index 0000000000..1257d04a84 --- /dev/null +++ b/gfx/skia/skia/include/core/SkStrokeRec.h @@ -0,0 +1,154 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStrokeRec_DEFINED +#define SkStrokeRec_DEFINED + +#include "include/core/SkPaint.h" +#include "include/private/base/SkMacros.h" + +class SkPath; + +SK_BEGIN_REQUIRE_DENSE +class SK_API SkStrokeRec { +public: + enum InitStyle { + kHairline_InitStyle, + kFill_InitStyle + }; + SkStrokeRec(InitStyle style); + SkStrokeRec(const SkPaint&, SkPaint::Style, SkScalar resScale = 1); + explicit SkStrokeRec(const SkPaint&, SkScalar resScale = 1); + + enum Style { + kHairline_Style, + kFill_Style, + kStroke_Style, + kStrokeAndFill_Style + }; + + static constexpr int kStyleCount = kStrokeAndFill_Style + 1; + + Style getStyle() const; + SkScalar getWidth() const { return fWidth; } + SkScalar getMiter() const { return fMiterLimit; } + SkPaint::Cap getCap() const { return (SkPaint::Cap)fCap; } + SkPaint::Join getJoin() const { return (SkPaint::Join)fJoin; } + + bool isHairlineStyle() const { + return kHairline_Style == this->getStyle(); + } + + bool isFillStyle() const { + return kFill_Style == this->getStyle(); + } + + void setFillStyle(); + void setHairlineStyle(); + /** + * Specify the strokewidth, and optionally if you want stroke + fill. + * Note, if width==0, then this request is taken to mean: + * strokeAndFill==true -> new style will be Fill + * strokeAndFill==false -> new style will be Hairline + */ + void setStrokeStyle(SkScalar width, bool strokeAndFill = false); + + void setStrokeParams(SkPaint::Cap cap, SkPaint::Join join, SkScalar miterLimit) { + fCap = cap; + fJoin = join; + fMiterLimit = miterLimit; + } + + SkScalar getResScale() const { + return fResScale; + } + + void setResScale(SkScalar rs) { + SkASSERT(rs > 0 && SkScalarIsFinite(rs)); + fResScale = rs; + } + + /** + * Returns true if this specifes any thick stroking, i.e. applyToPath() + * will return true. + */ + bool needToApply() const { + Style style = this->getStyle(); + return (kStroke_Style == style) || (kStrokeAndFill_Style == style); + } + + /** + * Apply these stroke parameters to the src path, returning the result + * in dst. + * + * If there was no change (i.e. style == hairline or fill) this returns + * false and dst is unchanged. Otherwise returns true and the result is + * stored in dst. + * + * src and dst may be the same path. + */ + bool applyToPath(SkPath* dst, const SkPath& src) const; + + /** + * Apply these stroke parameters to a paint. + */ + void applyToPaint(SkPaint* paint) const; + + /** + * Gives a conservative value for the outset that should applied to a + * geometries bounds to account for any inflation due to applying this + * strokeRec to the geometry. + */ + SkScalar getInflationRadius() const; + + /** + * Equivalent to: + * SkStrokeRec rec(paint, style); + * rec.getInflationRadius(); + * This does not account for other effects on the paint (i.e. path + * effect). + */ + static SkScalar GetInflationRadius(const SkPaint&, SkPaint::Style); + + static SkScalar GetInflationRadius(SkPaint::Join, SkScalar miterLimit, SkPaint::Cap, + SkScalar strokeWidth); + + /** + * Compare if two SkStrokeRecs have an equal effect on a path. + * Equal SkStrokeRecs produce equal paths. Equality of produced + * paths does not take the ResScale parameter into account. + */ + bool hasEqualEffect(const SkStrokeRec& other) const { + if (!this->needToApply()) { + return this->getStyle() == other.getStyle(); + } + return fWidth == other.fWidth && + (fJoin != SkPaint::kMiter_Join || fMiterLimit == other.fMiterLimit) && + fCap == other.fCap && + fJoin == other.fJoin && + fStrokeAndFill == other.fStrokeAndFill; + } + +private: + void init(const SkPaint&, SkPaint::Style, SkScalar resScale); + + SkScalar fResScale; + SkScalar fWidth; + SkScalar fMiterLimit; + // The following three members are packed together into a single u32. + // This is to avoid unnecessary padding and ensure binary equality for + // hashing (because the padded areas might contain garbage values). + // + // fCap and fJoin are larger than needed to avoid having to initialize + // any pad values + uint32_t fCap : 16; // SkPaint::Cap + uint32_t fJoin : 15; // SkPaint::Join + uint32_t fStrokeAndFill : 1; // bool +}; +SK_END_REQUIRE_DENSE + +#endif diff --git a/gfx/skia/skia/include/core/SkSurface.h b/gfx/skia/skia/include/core/SkSurface.h new file mode 100644 index 0000000000..3673d172b6 --- /dev/null +++ b/gfx/skia/skia/include/core/SkSurface.h @@ -0,0 +1,1199 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSurface_DEFINED +#define SkSurface_DEFINED + +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrTypes.h" +#else +enum GrSurfaceOrigin: int; +#endif + +#if defined(SK_GRAPHITE) +#include "include/gpu/GpuTypes.h" +namespace skgpu::graphite { +class BackendTexture; +} +#endif + +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 +#include +class GrDirectContext; +#endif + +#if defined(SK_GANESH) && defined(SK_METAL) +#include "include/gpu/mtl/GrMtlTypes.h" +#endif + +#include +#include +#include + +class GrBackendRenderTarget; +class GrBackendSemaphore; +class GrBackendTexture; +class GrRecordingContext; +class SkBitmap; +class SkCanvas; +class SkCapabilities; +class SkColorSpace; +class SkDeferredDisplayList; +class SkPaint; +class SkSurfaceCharacterization; +enum SkColorType : int; +struct SkIRect; +struct SkISize; + +namespace skgpu { +class MutableTextureState; +enum class Budgeted : bool; +} + +namespace skgpu::graphite { +class Recorder; +} + +/** \class SkSurface + SkSurface is responsible for managing the pixels that a canvas draws into. The pixels can be + allocated either in CPU memory (a raster surface) or on the GPU (a GrRenderTarget surface). + SkSurface takes care of allocating a SkCanvas that will draw into the surface. Call + surface->getCanvas() to use that canvas (but don't delete it, it is owned by the surface). + SkSurface always has non-zero dimensions. If there is a request for a new surface, and either + of the requested dimensions are zero, then nullptr will be returned. +*/ +class SK_API SkSurface : public SkRefCnt { +public: + + /** Allocates raster SkSurface. SkCanvas returned by SkSurface draws directly into pixels. + + SkSurface is returned if all parameters are valid. + Valid parameters include: + info dimensions are greater than zero; + info contains SkColorType and SkAlphaType supported by raster surface; + pixels is not nullptr; + rowBytes is large enough to contain info width pixels of SkColorType. + + Pixel buffer size should be info height times computed rowBytes. + Pixels are not initialized. + To access pixels after drawing, peekPixels() or readPixels(). + + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace, + of raster surface; width and height must be greater than zero + @param pixels pointer to destination pixels buffer + @param rowBytes interval from one SkSurface row to the next + @param surfaceProps LCD striping orientation and setting for device independent fonts; + may be nullptr + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRasterDirect(const SkImageInfo& imageInfo, void* pixels, + size_t rowBytes, + const SkSurfaceProps* surfaceProps = nullptr); + + static sk_sp MakeRasterDirect(const SkPixmap& pm, + const SkSurfaceProps* props = nullptr) { + return MakeRasterDirect(pm.info(), pm.writable_addr(), pm.rowBytes(), props); + } + + /** Allocates raster SkSurface. SkCanvas returned by SkSurface draws directly into pixels. + releaseProc is called with pixels and context when SkSurface is deleted. + + SkSurface is returned if all parameters are valid. + Valid parameters include: + info dimensions are greater than zero; + info contains SkColorType and SkAlphaType supported by raster surface; + pixels is not nullptr; + rowBytes is large enough to contain info width pixels of SkColorType. + + Pixel buffer size should be info height times computed rowBytes. + Pixels are not initialized. + To access pixels after drawing, call flush() or peekPixels(). + + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace, + of raster surface; width and height must be greater than zero + @param pixels pointer to destination pixels buffer + @param rowBytes interval from one SkSurface row to the next + @param releaseProc called when SkSurface is deleted; may be nullptr + @param context passed to releaseProc; may be nullptr + @param surfaceProps LCD striping orientation and setting for device independent fonts; + may be nullptr + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRasterDirectReleaseProc(const SkImageInfo& imageInfo, void* pixels, + size_t rowBytes, + void (*releaseProc)(void* pixels, void* context), + void* context, const SkSurfaceProps* surfaceProps = nullptr); + + /** Allocates raster SkSurface. SkCanvas returned by SkSurface draws directly into pixels. + Allocates and zeroes pixel memory. Pixel memory size is imageInfo.height() times + rowBytes, or times imageInfo.minRowBytes() if rowBytes is zero. + Pixel memory is deleted when SkSurface is deleted. + + SkSurface is returned if all parameters are valid. + Valid parameters include: + info dimensions are greater than zero; + info contains SkColorType and SkAlphaType supported by raster surface; + rowBytes is large enough to contain info width pixels of SkColorType, or is zero. + + If rowBytes is zero, a suitable value will be chosen internally. + + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace, + of raster surface; width and height must be greater than zero + @param rowBytes interval from one SkSurface row to the next; may be zero + @param surfaceProps LCD striping orientation and setting for device independent fonts; + may be nullptr + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRaster(const SkImageInfo& imageInfo, size_t rowBytes, + const SkSurfaceProps* surfaceProps); + + /** Allocates raster SkSurface. SkCanvas returned by SkSurface draws directly into pixels. + Allocates and zeroes pixel memory. Pixel memory size is imageInfo.height() times + imageInfo.minRowBytes(). + Pixel memory is deleted when SkSurface is deleted. + + SkSurface is returned if all parameters are valid. + Valid parameters include: + info dimensions are greater than zero; + info contains SkColorType and SkAlphaType supported by raster surface. + + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace, + of raster surface; width and height must be greater than zero + @param props LCD striping orientation and setting for device independent fonts; + may be nullptr + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRaster(const SkImageInfo& imageInfo, + const SkSurfaceProps* props = nullptr) { + return MakeRaster(imageInfo, 0, props); + } + + /** Allocates raster SkSurface. SkCanvas returned by SkSurface draws directly into pixels. + Allocates and zeroes pixel memory. Pixel memory size is height times width times + four. Pixel memory is deleted when SkSurface is deleted. + + Internally, sets SkImageInfo to width, height, native color type, and + kPremul_SkAlphaType. + + SkSurface is returned if width and height are greater than zero. + + Use to create SkSurface that matches SkPMColor, the native pixel arrangement on + the platform. SkSurface drawn to output device skips converting its pixel format. + + @param width pixel column count; must be greater than zero + @param height pixel row count; must be greater than zero + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRasterN32Premul(int width, int height, + const SkSurfaceProps* surfaceProps = nullptr); + + /** Caller data passed to RenderTarget/TextureReleaseProc; may be nullptr. */ + typedef void* ReleaseContext; + + /** User function called when supplied render target may be deleted. */ + typedef void (*RenderTargetReleaseProc)(ReleaseContext releaseContext); + + /** User function called when supplied texture may be deleted. */ + typedef void (*TextureReleaseProc)(ReleaseContext releaseContext); + + /** Wraps a GPU-backed texture into SkSurface. Caller must ensure the texture is + valid for the lifetime of returned SkSurface. If sampleCnt greater than zero, + creates an intermediate MSAA SkSurface which is used for drawing backendTexture. + + SkSurface is returned if all parameters are valid. backendTexture is valid if + its pixel configuration agrees with colorSpace and context; for instance, if + backendTexture has an sRGB configuration, then context must support sRGB, + and colorSpace must be present. Further, backendTexture width and height must + not exceed context capabilities, and the context must be able to support + back-end textures. + + Upon success textureReleaseProc is called when it is safe to delete the texture in the + backend API (accounting only for use of the texture by this surface). If SkSurface creation + fails textureReleaseProc is called before this function returns. + + If defined(SK_GANESH) is defined as zero, has no effect and returns nullptr. + + @param context GPU context + @param backendTexture texture residing on GPU + @param sampleCnt samples per pixel, or 0 to disable full scene anti-aliasing + @param colorSpace range of colors; may be nullptr + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @param textureReleaseProc function called when texture can be released + @param releaseContext state passed to textureReleaseProc + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeFromBackendTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin origin, int sampleCnt, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps, + TextureReleaseProc textureReleaseProc = nullptr, + ReleaseContext releaseContext = nullptr); + + /** Wraps a GPU-backed buffer into SkSurface. Caller must ensure backendRenderTarget + is valid for the lifetime of returned SkSurface. + + SkSurface is returned if all parameters are valid. backendRenderTarget is valid if + its pixel configuration agrees with colorSpace and context; for instance, if + backendRenderTarget has an sRGB configuration, then context must support sRGB, + and colorSpace must be present. Further, backendRenderTarget width and height must + not exceed context capabilities, and the context must be able to support + back-end render targets. + + Upon success releaseProc is called when it is safe to delete the render target in the + backend API (accounting only for use of the render target by this surface). If SkSurface + creation fails releaseProc is called before this function returns. + + If defined(SK_GANESH) is defined as zero, has no effect and returns nullptr. + + @param context GPU context + @param backendRenderTarget GPU intermediate memory buffer + @param colorSpace range of colors + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @param releaseProc function called when backendRenderTarget can be released + @param releaseContext state passed to releaseProc + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeFromBackendRenderTarget(GrRecordingContext* context, + const GrBackendRenderTarget& backendRenderTarget, + GrSurfaceOrigin origin, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps, + RenderTargetReleaseProc releaseProc = nullptr, + ReleaseContext releaseContext = nullptr); + + /** Returns SkSurface on GPU indicated by context. Allocates memory for + pixels, based on the width, height, and SkColorType in SkImageInfo. budgeted + selects whether allocation for pixels is tracked by context. imageInfo + describes the pixel format in SkColorType, and transparency in + SkAlphaType, and color matching in SkColorSpace. + + sampleCount requests the number of samples per pixel. + Pass zero to disable multi-sample anti-aliasing. The request is rounded + up to the next supported count, or rounded down if it is larger than the + maximum supported count. + + surfaceOrigin pins either the top-left or the bottom-left corner to the origin. + + shouldCreateWithMips hints that SkImage returned by makeImageSnapshot() is mip map. + + If defined(SK_GANESH) is defined as zero, has no effect and returns nullptr. + + @param context GPU context + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace; + width, or height, or both, may be zero + @param sampleCount samples per pixel, or 0 to disable full scene anti-aliasing + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @param shouldCreateWithMips hint that SkSurface will host mip map images + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRenderTarget(GrRecordingContext* context, + skgpu::Budgeted budgeted, + const SkImageInfo& imageInfo, + int sampleCount, + GrSurfaceOrigin surfaceOrigin, + const SkSurfaceProps* surfaceProps, + bool shouldCreateWithMips = false); + + /** Returns SkSurface on GPU indicated by context. Allocates memory for + pixels, based on the width, height, and SkColorType in SkImageInfo. budgeted + selects whether allocation for pixels is tracked by context. imageInfo + describes the pixel format in SkColorType, and transparency in + SkAlphaType, and color matching in SkColorSpace. + + sampleCount requests the number of samples per pixel. + Pass zero to disable multi-sample anti-aliasing. The request is rounded + up to the next supported count, or rounded down if it is larger than the + maximum supported count. + + SkSurface bottom-left corner is pinned to the origin. + + @param context GPU context + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace, + of raster surface; width, or height, or both, may be zero + @param sampleCount samples per pixel, or 0 to disable multi-sample anti-aliasing + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRenderTarget(GrRecordingContext* context, + skgpu::Budgeted budgeted, + const SkImageInfo& imageInfo, + int sampleCount, + const SkSurfaceProps* surfaceProps) { +#if defined(SK_GANESH) + return MakeRenderTarget(context, budgeted, imageInfo, sampleCount, + kBottomLeft_GrSurfaceOrigin, surfaceProps); +#else + // TODO(kjlubick, scroggo) Remove this once Android is updated. + return nullptr; +#endif + } + + /** Returns SkSurface on GPU indicated by context. Allocates memory for + pixels, based on the width, height, and SkColorType in SkImageInfo. budgeted + selects whether allocation for pixels is tracked by context. imageInfo + describes the pixel format in SkColorType, and transparency in + SkAlphaType, and color matching in SkColorSpace. + + SkSurface bottom-left corner is pinned to the origin. + + @param context GPU context + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace, + of raster surface; width, or height, or both, may be zero + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRenderTarget(GrRecordingContext* context, + skgpu::Budgeted budgeted, + const SkImageInfo& imageInfo) { +#if defined(SK_GANESH) + if (!imageInfo.width() || !imageInfo.height()) { + return nullptr; + } + return MakeRenderTarget(context, budgeted, imageInfo, 0, kBottomLeft_GrSurfaceOrigin, + nullptr); +#else + // TODO(kjlubick, scroggo) Remove this once Android is updated. + return nullptr; +#endif + } + + /** Returns SkSurface on GPU indicated by context that is compatible with the provided + characterization. budgeted selects whether allocation for pixels is tracked by context. + + @param context GPU context + @param characterization description of the desired SkSurface + @return SkSurface if all parameters are valid; otherwise, nullptr + */ + static sk_sp MakeRenderTarget(GrRecordingContext* context, + const SkSurfaceCharacterization& characterization, + skgpu::Budgeted budgeted); + +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 + /** Private. + Creates SkSurface from Android hardware buffer. + Returned SkSurface takes a reference on the buffer. The ref on the buffer will be released + when the SkSurface is destroyed and there is no pending work on the GPU involving the + buffer. + + Only available on Android, when __ANDROID_API__ is defined to be 26 or greater. + + Currently this is only supported for buffers that can be textured as well as rendered to. + In other words that must have both AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT and + AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE usage bits. + + @param context GPU context + @param hardwareBuffer AHardwareBuffer Android hardware buffer + @param colorSpace range of colors; may be nullptr + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @param fromWindow Whether or not the AHardwareBuffer is part of an Android Window. + Currently only used with Vulkan backend. + @return created SkSurface, or nullptr + */ + static sk_sp MakeFromAHardwareBuffer(GrDirectContext* context, + AHardwareBuffer* hardwareBuffer, + GrSurfaceOrigin origin, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + , bool fromWindow = false +#endif // SK_BUILD_FOR_ANDROID_FRAMEWORK + ); +#endif + +#if defined(SK_GRAPHITE) + /** + * In Graphite, while clients hold a ref on an SkSurface, the backing gpu object does _not_ + * count against the budget. Once an SkSurface is freed, the backing gpu object may or may + * not become a scratch (i.e., reusable) resource but, if it does, it will be counted against + * the budget. + */ + static sk_sp MakeGraphite( + skgpu::graphite::Recorder*, + const SkImageInfo& imageInfo, + skgpu::Mipmapped = skgpu::Mipmapped::kNo, + const SkSurfaceProps* surfaceProps = nullptr); + + /** + * Wraps a GPU-backed texture in an SkSurface. Depending on the backend gpu API, the caller may + * be required to ensure the texture is valid for the lifetime of the returned SkSurface. The + * required lifetimes for the specific apis are: + * Metal: Skia will call retain on the underlying MTLTexture so the caller can drop it once + * this call returns. + * + * SkSurface is returned if all the parameters are valid. The backendTexture is valid if its + * format agrees with colorSpace and recorder; for instance, if backendTexture has an sRGB + * configuration, then the recorder must support sRGB, and colorSpace must be present. Further, + * backendTexture's width and height must not exceed the recorder's capabilities, and the + * recorder must be able to support the back-end texture. + */ + static sk_sp MakeGraphiteFromBackendTexture(skgpu::graphite::Recorder*, + const skgpu::graphite::BackendTexture&, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* props); + +#endif // SK_GRAPHITE + +#if defined(SK_GANESH) && defined(SK_METAL) + /** Creates SkSurface from CAMetalLayer. + Returned SkSurface takes a reference on the CAMetalLayer. The ref on the layer will be + released when the SkSurface is destroyed. + + Only available when Metal API is enabled. + + Will grab the current drawable from the layer and use its texture as a backendRT to + create a renderable surface. + + @param context GPU context + @param layer GrMTLHandle (expected to be a CAMetalLayer*) + @param sampleCnt samples per pixel, or 0 to disable full scene anti-aliasing + @param colorSpace range of colors; may be nullptr + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @param drawable Pointer to drawable to be filled in when this surface is + instantiated; may not be nullptr + @return created SkSurface, or nullptr + */ + static sk_sp MakeFromCAMetalLayer(GrRecordingContext* context, + GrMTLHandle layer, + GrSurfaceOrigin origin, + int sampleCnt, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps, + GrMTLHandle* drawable) + SK_API_AVAILABLE_CA_METAL_LAYER; + + /** Creates SkSurface from MTKView. + Returned SkSurface takes a reference on the MTKView. The ref on the layer will be + released when the SkSurface is destroyed. + + Only available when Metal API is enabled. + + Will grab the current drawable from the layer and use its texture as a backendRT to + create a renderable surface. + + @param context GPU context + @param layer GrMTLHandle (expected to be a MTKView*) + @param sampleCnt samples per pixel, or 0 to disable full scene anti-aliasing + @param colorSpace range of colors; may be nullptr + @param surfaceProps LCD striping orientation and setting for device independent + fonts; may be nullptr + @return created SkSurface, or nullptr + */ + static sk_sp MakeFromMTKView(GrRecordingContext* context, + GrMTLHandle mtkView, + GrSurfaceOrigin origin, + int sampleCnt, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps) + SK_API_AVAILABLE(macos(10.11), ios(9.0)); +#endif + + /** Is this surface compatible with the provided characterization? + + This method can be used to determine if an existing SkSurface is a viable destination + for an SkDeferredDisplayList. + + @param characterization The characterization for which a compatibility check is desired + @return true if this surface is compatible with the characterization; + false otherwise + */ + bool isCompatible(const SkSurfaceCharacterization& characterization) const; + + /** Returns SkSurface without backing pixels. Drawing to SkCanvas returned from SkSurface + has no effect. Calling makeImageSnapshot() on returned SkSurface returns nullptr. + + @param width one or greater + @param height one or greater + @return SkSurface if width and height are positive; otherwise, nullptr + + example: https://fiddle.skia.org/c/@Surface_MakeNull + */ + static sk_sp MakeNull(int width, int height); + + /** Returns pixel count in each row; may be zero or greater. + + @return number of pixel columns + */ + int width() const { return fWidth; } + + /** Returns pixel row count; may be zero or greater. + + @return number of pixel rows + */ + int height() const { return fHeight; } + + /** Returns an ImageInfo describing the surface. + */ + virtual SkImageInfo imageInfo() const { return SkImageInfo::MakeUnknown(fWidth, fHeight); } + + /** Returns unique value identifying the content of SkSurface. Returned value changes + each time the content changes. Content is changed by drawing, or by calling + notifyContentWillChange(). + + @return unique content identifier + + example: https://fiddle.skia.org/c/@Surface_notifyContentWillChange + */ + uint32_t generationID(); + + /** \enum SkSurface::ContentChangeMode + ContentChangeMode members are parameters to notifyContentWillChange(). + */ + enum ContentChangeMode { + kDiscard_ContentChangeMode, //!< discards surface on change + kRetain_ContentChangeMode, //!< preserves surface on change + }; + + /** Notifies that SkSurface contents will be changed by code outside of Skia. + Subsequent calls to generationID() return a different value. + + TODO: Can kRetain_ContentChangeMode be deprecated? + + example: https://fiddle.skia.org/c/@Surface_notifyContentWillChange + */ + void notifyContentWillChange(ContentChangeMode mode); + + /** Returns the recording context being used by the SkSurface. + + @return the recording context, if available; nullptr otherwise + */ + GrRecordingContext* recordingContext(); + + /** Returns the recorder being used by the SkSurface. + + @return the recorder, if available; nullptr otherwise + */ + skgpu::graphite::Recorder* recorder(); + +#if defined(SK_GANESH) + enum BackendHandleAccess { + kFlushRead_BackendHandleAccess, //!< back-end object is readable + kFlushWrite_BackendHandleAccess, //!< back-end object is writable + kDiscardWrite_BackendHandleAccess, //!< back-end object must be overwritten + }; + + /** Deprecated. + */ + static const BackendHandleAccess kFlushRead_TextureHandleAccess = + kFlushRead_BackendHandleAccess; + + /** Deprecated. + */ + static const BackendHandleAccess kFlushWrite_TextureHandleAccess = + kFlushWrite_BackendHandleAccess; + + /** Deprecated. + */ + static const BackendHandleAccess kDiscardWrite_TextureHandleAccess = + kDiscardWrite_BackendHandleAccess; + + /** Retrieves the back-end texture. If SkSurface has no back-end texture, an invalid + object is returned. Call GrBackendTexture::isValid to determine if the result + is valid. + + The returned GrBackendTexture should be discarded if the SkSurface is drawn to or deleted. + + @return GPU texture reference; invalid on failure + */ + GrBackendTexture getBackendTexture(BackendHandleAccess backendHandleAccess); + + /** Retrieves the back-end render target. If SkSurface has no back-end render target, an invalid + object is returned. Call GrBackendRenderTarget::isValid to determine if the result + is valid. + + The returned GrBackendRenderTarget should be discarded if the SkSurface is drawn to + or deleted. + + @return GPU render target reference; invalid on failure + */ + GrBackendRenderTarget getBackendRenderTarget(BackendHandleAccess backendHandleAccess); + + /** If the surface was made via MakeFromBackendTexture then it's backing texture may be + substituted with a different texture. The contents of the previous backing texture are + copied into the new texture. SkCanvas state is preserved. The original sample count is + used. The GrBackendFormat and dimensions of replacement texture must match that of + the original. + + Upon success textureReleaseProc is called when it is safe to delete the texture in the + backend API (accounting only for use of the texture by this surface). If SkSurface creation + fails textureReleaseProc is called before this function returns. + + @param backendTexture the new backing texture for the surface + @param mode Retain or discard current Content + @param textureReleaseProc function called when texture can be released + @param releaseContext state passed to textureReleaseProc + */ + bool replaceBackendTexture(const GrBackendTexture& backendTexture, + GrSurfaceOrigin origin, + ContentChangeMode mode = kRetain_ContentChangeMode, + TextureReleaseProc textureReleaseProc = nullptr, + ReleaseContext releaseContext = nullptr); +#endif + + /** Returns SkCanvas that draws into SkSurface. Subsequent calls return the same SkCanvas. + SkCanvas returned is managed and owned by SkSurface, and is deleted when SkSurface + is deleted. + + @return drawing SkCanvas for SkSurface + + example: https://fiddle.skia.org/c/@Surface_getCanvas + */ + SkCanvas* getCanvas(); + + /** Returns SkCapabilities that describes the capabilities of the SkSurface's device. + + @return SkCapabilities of SkSurface's device. + */ + sk_sp capabilities(); + + /** Returns a compatible SkSurface, or nullptr. Returned SkSurface contains + the same raster, GPU, or null properties as the original. Returned SkSurface + does not share the same pixels. + + Returns nullptr if imageInfo width or height are zero, or if imageInfo + is incompatible with SkSurface. + + @param imageInfo width, height, SkColorType, SkAlphaType, SkColorSpace, + of SkSurface; width and height must be greater than zero + @return compatible SkSurface or nullptr + + example: https://fiddle.skia.org/c/@Surface_makeSurface + */ + sk_sp makeSurface(const SkImageInfo& imageInfo); + + /** Calls makeSurface(ImageInfo) with the same ImageInfo as this surface, but with the + * specified width and height. + */ + sk_sp makeSurface(int width, int height); + + /** Returns SkImage capturing SkSurface contents. Subsequent drawing to SkSurface contents + are not captured. SkImage allocation is accounted for if SkSurface was created with + skgpu::Budgeted::kYes. + + @return SkImage initialized with SkSurface contents + + example: https://fiddle.skia.org/c/@Surface_makeImageSnapshot + */ + sk_sp makeImageSnapshot(); + + /** + * Like the no-parameter version, this returns an image of the current surface contents. + * This variant takes a rectangle specifying the subset of the surface that is of interest. + * These bounds will be sanitized before being used. + * - If bounds extends beyond the surface, it will be trimmed to just the intersection of + * it and the surface. + * - If bounds does not intersect the surface, then this returns nullptr. + * - If bounds == the surface, then this is the same as calling the no-parameter variant. + + example: https://fiddle.skia.org/c/@Surface_makeImageSnapshot_2 + */ + sk_sp makeImageSnapshot(const SkIRect& bounds); + +#if defined(SK_GRAPHITE) + /** + * The 'asImage' and 'makeImageCopy' API/entry points are currently only available for + * Graphite. + * + * In this API, SkSurface no longer supports copy-on-write behavior. Instead, when creating + * an image for a surface, the client must explicitly indicate if a copy should be made. + * In both of the below calls the resource backing the surface will never change. + * + * The 'asImage' entry point has some major ramifications for the mutability of the + * returned SkImage. Since the originating surface and the returned image share the + * same backing, care must be taken by the client to ensure that the contents of the image + * reflect the desired contents when it is consumed by the gpu. + * Note: if the backing GPU buffer isn't textureable this method will return null. Graphite + * will not attempt to make a copy. + * Note: For 'asImage', the mipmapping of the image will match that of the source surface. + * + * The 'makeImageCopy' entry point allows subsetting and the addition of mipmaps (since + * a copy is already being made). + * + * In Graphite, the legacy API call (i.e., makeImageSnapshot) will just always make a copy. + */ + sk_sp asImage(); + + sk_sp makeImageCopy(const SkIRect* subset = nullptr, + skgpu::Mipmapped mipmapped = skgpu::Mipmapped::kNo); +#endif + + /** Draws SkSurface contents to canvas, with its top-left corner at (x, y). + + If SkPaint paint is not nullptr, apply SkColorFilter, alpha, SkImageFilter, and SkBlendMode. + + @param canvas SkCanvas drawn into + @param x horizontal offset in SkCanvas + @param y vertical offset in SkCanvas + @param sampling what technique to use when sampling the surface pixels + @param paint SkPaint containing SkBlendMode, SkColorFilter, SkImageFilter, + and so on; or nullptr + + example: https://fiddle.skia.org/c/@Surface_draw + */ + void draw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkSamplingOptions& sampling, + const SkPaint* paint); + + void draw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint = nullptr) { + this->draw(canvas, x, y, SkSamplingOptions(), paint); + } + + /** Copies SkSurface pixel address, row bytes, and SkImageInfo to SkPixmap, if address + is available, and returns true. If pixel address is not available, return + false and leave SkPixmap unchanged. + + pixmap contents become invalid on any future change to SkSurface. + + @param pixmap storage for pixel state if pixels are readable; otherwise, ignored + @return true if SkSurface has direct access to pixels + + example: https://fiddle.skia.org/c/@Surface_peekPixels + */ + bool peekPixels(SkPixmap* pixmap); + + /** Copies SkRect of pixels to dst. + + Source SkRect corners are (srcX, srcY) and SkSurface (width(), height()). + Destination SkRect corners are (0, 0) and (dst.width(), dst.height()). + Copies each readable pixel intersecting both rectangles, without scaling, + converting to dst.colorType() and dst.alphaType() if required. + + Pixels are readable when SkSurface is raster, or backed by a GPU. + + The destination pixel storage must be allocated by the caller. + + Pixel values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination rectangles + are copied. dst contents outside SkRect intersection are unchanged. + + Pass negative values for srcX or srcY to offset pixels across or down destination. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - SkPixmap pixels could not be allocated. + - dst.rowBytes() is too small to contain one row of pixels. + + @param dst storage for pixels copied from SkSurface + @param srcX offset into readable pixels on x-axis; may be negative + @param srcY offset into readable pixels on y-axis; may be negative + @return true if pixels were copied + + example: https://fiddle.skia.org/c/@Surface_readPixels + */ + bool readPixels(const SkPixmap& dst, int srcX, int srcY); + + /** Copies SkRect of pixels from SkCanvas into dstPixels. + + Source SkRect corners are (srcX, srcY) and SkSurface (width(), height()). + Destination SkRect corners are (0, 0) and (dstInfo.width(), dstInfo.height()). + Copies each readable pixel intersecting both rectangles, without scaling, + converting to dstInfo.colorType() and dstInfo.alphaType() if required. + + Pixels are readable when SkSurface is raster, or backed by a GPU. + + The destination pixel storage must be allocated by the caller. + + Pixel values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination rectangles + are copied. dstPixels contents outside SkRect intersection are unchanged. + + Pass negative values for srcX or srcY to offset pixels across or down destination. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - SkSurface pixels could not be converted to dstInfo.colorType() or dstInfo.alphaType(). + - dstRowBytes is too small to contain one row of pixels. + + @param dstInfo width, height, SkColorType, and SkAlphaType of dstPixels + @param dstPixels storage for pixels; dstInfo.height() times dstRowBytes, or larger + @param dstRowBytes size of one destination row; dstInfo.width() times pixel size, or larger + @param srcX offset into readable pixels on x-axis; may be negative + @param srcY offset into readable pixels on y-axis; may be negative + @return true if pixels were copied + */ + bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, + int srcX, int srcY); + + /** Copies SkRect of pixels from SkSurface into bitmap. + + Source SkRect corners are (srcX, srcY) and SkSurface (width(), height()). + Destination SkRect corners are (0, 0) and (bitmap.width(), bitmap.height()). + Copies each readable pixel intersecting both rectangles, without scaling, + converting to bitmap.colorType() and bitmap.alphaType() if required. + + Pixels are readable when SkSurface is raster, or backed by a GPU. + + The destination pixel storage must be allocated by the caller. + + Pixel values are converted only if SkColorType and SkAlphaType + do not match. Only pixels within both source and destination rectangles + are copied. dst contents outside SkRect intersection are unchanged. + + Pass negative values for srcX or srcY to offset pixels across or down destination. + + Does not copy, and returns false if: + - Source and destination rectangles do not intersect. + - SkSurface pixels could not be converted to dst.colorType() or dst.alphaType(). + - dst pixels could not be allocated. + - dst.rowBytes() is too small to contain one row of pixels. + + @param dst storage for pixels copied from SkSurface + @param srcX offset into readable pixels on x-axis; may be negative + @param srcY offset into readable pixels on y-axis; may be negative + @return true if pixels were copied + + example: https://fiddle.skia.org/c/@Surface_readPixels_3 + */ + bool readPixels(const SkBitmap& dst, int srcX, int srcY); + + using AsyncReadResult = SkImage::AsyncReadResult; + + /** Client-provided context that is passed to client-provided ReadPixelsContext. */ + using ReadPixelsContext = void*; + + /** Client-provided callback to asyncRescaleAndReadPixels() or + asyncRescaleAndReadPixelsYUV420() that is called when read result is ready or on failure. + */ + using ReadPixelsCallback = void(ReadPixelsContext, std::unique_ptr); + + /** Controls the gamma that rescaling occurs in for asyncRescaleAndReadPixels() and + asyncRescaleAndReadPixelsYUV420(). + */ + using RescaleGamma = SkImage::RescaleGamma; + using RescaleMode = SkImage::RescaleMode; + + /** Makes surface pixel data available to caller, possibly asynchronously. It can also rescale + the surface pixels. + + Currently asynchronous reads are only supported on the GPU backend and only when the + underlying 3D API supports transfer buffers and CPU/GPU synchronization primitives. In all + other cases this operates synchronously. + + Data is read from the source sub-rectangle, is optionally converted to a linear gamma, is + rescaled to the size indicated by 'info', is then converted to the color space, color type, + and alpha type of 'info'. A 'srcRect' that is not contained by the bounds of the surface + causes failure. + + When the pixel data is ready the caller's ReadPixelsCallback is called with a + AsyncReadResult containing pixel data in the requested color type, alpha type, and color + space. The AsyncReadResult will have count() == 1. Upon failure the callback is called + with nullptr for AsyncReadResult. For a GPU surface this flushes work but a submit must + occur to guarantee a finite time before the callback is called. + + The data is valid for the lifetime of AsyncReadResult with the exception that if the + SkSurface is GPU-backed the data is immediately invalidated if the context is abandoned + or destroyed. + + @param info info of the requested pixels + @param srcRect subrectangle of surface to read + @param rescaleGamma controls whether rescaling is done in the surface's gamma or whether + the source data is transformed to a linear gamma before rescaling. + @param rescaleMode controls the technique of the rescaling + @param callback function to call with result of the read + @param context passed to callback + */ + void asyncRescaleAndReadPixels(const SkImageInfo& info, + const SkIRect& srcRect, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context); + + /** + Similar to asyncRescaleAndReadPixels but performs an additional conversion to YUV. The + RGB->YUV conversion is controlled by 'yuvColorSpace'. The YUV data is returned as three + planes ordered y, u, v. The u and v planes are half the width and height of the resized + rectangle. The y, u, and v values are single bytes. Currently this fails if 'dstSize' + width and height are not even. A 'srcRect' that is not contained by the bounds of the + surface causes failure. + + When the pixel data is ready the caller's ReadPixelsCallback is called with a + AsyncReadResult containing the planar data. The AsyncReadResult will have count() == 3. + Upon failure the callback is called with nullptr for AsyncReadResult. For a GPU surface this + flushes work but a submit must occur to guarantee a finite time before the callback is + called. + + The data is valid for the lifetime of AsyncReadResult with the exception that if the + SkSurface is GPU-backed the data is immediately invalidated if the context is abandoned + or destroyed. + + @param yuvColorSpace The transformation from RGB to YUV. Applied to the resized image + after it is converted to dstColorSpace. + @param dstColorSpace The color space to convert the resized image to, after rescaling. + @param srcRect The portion of the surface to rescale and convert to YUV planes. + @param dstSize The size to rescale srcRect to + @param rescaleGamma controls whether rescaling is done in the surface's gamma or whether + the source data is transformed to a linear gamma before rescaling. + @param rescaleMode controls the sampling technique of the rescaling + @param callback function to call with the planar read result + @param context passed to callback + */ + void asyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace, + sk_sp dstColorSpace, + const SkIRect& srcRect, + const SkISize& dstSize, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context); + + /** Copies SkRect of pixels from the src SkPixmap to the SkSurface. + + Source SkRect corners are (0, 0) and (src.width(), src.height()). + Destination SkRect corners are (dstX, dstY) and + (dstX + Surface width(), dstY + Surface height()). + + Copies each readable pixel intersecting both rectangles, without scaling, + converting to SkSurface colorType() and SkSurface alphaType() if required. + + @param src storage for pixels to copy to SkSurface + @param dstX x-axis position relative to SkSurface to begin copy; may be negative + @param dstY y-axis position relative to SkSurface to begin copy; may be negative + + example: https://fiddle.skia.org/c/@Surface_writePixels + */ + void writePixels(const SkPixmap& src, int dstX, int dstY); + + /** Copies SkRect of pixels from the src SkBitmap to the SkSurface. + + Source SkRect corners are (0, 0) and (src.width(), src.height()). + Destination SkRect corners are (dstX, dstY) and + (dstX + Surface width(), dstY + Surface height()). + + Copies each readable pixel intersecting both rectangles, without scaling, + converting to SkSurface colorType() and SkSurface alphaType() if required. + + @param src storage for pixels to copy to SkSurface + @param dstX x-axis position relative to SkSurface to begin copy; may be negative + @param dstY y-axis position relative to SkSurface to begin copy; may be negative + + example: https://fiddle.skia.org/c/@Surface_writePixels_2 + */ + void writePixels(const SkBitmap& src, int dstX, int dstY); + + /** Returns SkSurfaceProps for surface. + + @return LCD striping orientation and setting for device independent fonts + */ + const SkSurfaceProps& props() const { return fProps; } + + /** Call to ensure all reads/writes of the surface have been issued to the underlying 3D API. + Skia will correctly order its own draws and pixel operations. This must to be used to ensure + correct ordering when the surface backing store is accessed outside Skia (e.g. direct use of + the 3D API or a windowing system). GrDirectContext has additional flush and submit methods + that apply to all surfaces and images created from a GrDirectContext. This is equivalent to + calling SkSurface::flush with a default GrFlushInfo followed by + GrDirectContext::submit(syncCpu). + */ + void flushAndSubmit(bool syncCpu = false); + + enum class BackendSurfaceAccess { + kNoAccess, //!< back-end object will not be used by client + kPresent, //!< back-end surface will be used for presenting to screen + }; + +#if defined(SK_GANESH) + /** If a surface is GPU texture backed, is being drawn with MSAA, and there is a resolve + texture, this call will insert a resolve command into the stream of gpu commands. In order + for the resolve to actually have an effect, the work still needs to be flushed and submitted + to the GPU after recording the resolve command. If a resolve is not supported or the + SkSurface has no dirty work to resolve, then this call is a no-op. + + This call is most useful when the SkSurface is created by wrapping a single sampled gpu + texture, but asking Skia to render with MSAA. If the client wants to use the wrapped texture + outside of Skia, the only way to trigger a resolve is either to call this command or use + SkSurface::flush. + */ + void resolveMSAA(); + + /** Issues pending SkSurface commands to the GPU-backed API objects and resolves any SkSurface + MSAA. A call to GrDirectContext::submit is always required to ensure work is actually sent + to the gpu. Some specific API details: + GL: Commands are actually sent to the driver, but glFlush is never called. Thus some + sync objects from the flush will not be valid until a submission occurs. + + Vulkan/Metal/D3D/Dawn: Commands are recorded to the backend APIs corresponding command + buffer or encoder objects. However, these objects are not sent to the gpu until a + submission occurs. + + The work that is submitted to the GPU will be dependent on the BackendSurfaceAccess that is + passed in. + + If BackendSurfaceAccess::kNoAccess is passed in all commands will be issued to the GPU. + + If BackendSurfaceAccess::kPresent is passed in and the backend API is not Vulkan, it is + treated the same as kNoAccess. If the backend API is Vulkan, the VkImage that backs the + SkSurface will be transferred back to its original queue. If the SkSurface was created by + wrapping a VkImage, the queue will be set to the queue which was originally passed in on + the GrVkImageInfo. Additionally, if the original queue was not external or foreign the + layout of the VkImage will be set to VK_IMAGE_LAYOUT_PRESENT_SRC_KHR. + + The GrFlushInfo describes additional options to flush. Please see documentation at + GrFlushInfo for more info. + + If the return is GrSemaphoresSubmitted::kYes, only initialized GrBackendSemaphores will be + submitted to the gpu during the next submit call (it is possible Skia failed to create a + subset of the semaphores). The client should not wait on these semaphores until after submit + has been called, but must keep them alive until then. If a submit flag was passed in with + the flush these valid semaphores can we waited on immediately. If this call returns + GrSemaphoresSubmitted::kNo, the GPU backend will not submit any semaphores to be signaled on + the GPU. Thus the client should not have the GPU wait on any of the semaphores passed in + with the GrFlushInfo. Regardless of whether semaphores were submitted to the GPU or not, the + client is still responsible for deleting any initialized semaphores. + Regardless of semaphore submission the context will still be flushed. It should be + emphasized that a return value of GrSemaphoresSubmitted::kNo does not mean the flush did not + happen. It simply means there were no semaphores submitted to the GPU. A caller should only + take this as a failure if they passed in semaphores to be submitted. + + Pending surface commands are flushed regardless of the return result. + + @param access type of access the call will do on the backend object after flush + @param info flush options + */ + GrSemaphoresSubmitted flush(BackendSurfaceAccess access, const GrFlushInfo& info); + + /** Issues pending SkSurface commands to the GPU-backed API objects and resolves any SkSurface + MSAA. A call to GrDirectContext::submit is always required to ensure work is actually sent + to the gpu. Some specific API details: + GL: Commands are actually sent to the driver, but glFlush is never called. Thus some + sync objects from the flush will not be valid until a submission occurs. + + Vulkan/Metal/D3D/Dawn: Commands are recorded to the backend APIs corresponding command + buffer or encoder objects. However, these objects are not sent to the gpu until a + submission occurs. + + The GrFlushInfo describes additional options to flush. Please see documentation at + GrFlushInfo for more info. + + If a skgpu::MutableTextureState is passed in, at the end of the flush we will transition + the surface to be in the state requested by the skgpu::MutableTextureState. If the surface + (or SkImage or GrBackendSurface wrapping the same backend object) is used again after this + flush the state may be changed and no longer match what is requested here. This is often + used if the surface will be used for presenting or external use and the client wants backend + object to be prepped for that use. A finishedProc or semaphore on the GrFlushInfo will also + include the work for any requested state change. + + If the backend API is Vulkan, the caller can set the skgpu::MutableTextureState's + VkImageLayout to VK_IMAGE_LAYOUT_UNDEFINED or queueFamilyIndex to VK_QUEUE_FAMILY_IGNORED to + tell Skia to not change those respective states. + + If the return is GrSemaphoresSubmitted::kYes, only initialized GrBackendSemaphores will be + submitted to the gpu during the next submit call (it is possible Skia failed to create a + subset of the semaphores). The client should not wait on these semaphores until after submit + has been called, but must keep them alive until then. If a submit flag was passed in with + the flush these valid semaphores can we waited on immediately. If this call returns + GrSemaphoresSubmitted::kNo, the GPU backend will not submit any semaphores to be signaled on + the GPU. Thus the client should not have the GPU wait on any of the semaphores passed in + with the GrFlushInfo. Regardless of whether semaphores were submitted to the GPU or not, the + client is still responsible for deleting any initialized semaphores. + Regardleess of semaphore submission the context will still be flushed. It should be + emphasized that a return value of GrSemaphoresSubmitted::kNo does not mean the flush did not + happen. It simply means there were no semaphores submitted to the GPU. A caller should only + take this as a failure if they passed in semaphores to be submitted. + + Pending surface commands are flushed regardless of the return result. + + @param info flush options + @param access optional state change request after flush + */ + GrSemaphoresSubmitted flush(const GrFlushInfo& info, + const skgpu::MutableTextureState* newState = nullptr); +#endif // defined(SK_GANESH) + + void flush(); + + /** Inserts a list of GPU semaphores that the current GPU-backed API must wait on before + executing any more commands on the GPU for this surface. If this call returns false, then + the GPU back-end will not wait on any passed in semaphores, and the client will still own + the semaphores, regardless of the value of deleteSemaphoresAfterWait. + + If deleteSemaphoresAfterWait is false then Skia will not delete the semaphores. In this case + it is the client's responsibility to not destroy or attempt to reuse the semaphores until it + knows that Skia has finished waiting on them. This can be done by using finishedProcs + on flush calls. + + @param numSemaphores size of waitSemaphores array + @param waitSemaphores array of semaphore containers + @paramm deleteSemaphoresAfterWait who owns and should delete the semaphores + @return true if GPU is waiting on semaphores + */ + bool wait(int numSemaphores, const GrBackendSemaphore* waitSemaphores, + bool deleteSemaphoresAfterWait = true); + + /** Initializes SkSurfaceCharacterization that can be used to perform GPU back-end + processing in a separate thread. Typically this is used to divide drawing + into multiple tiles. SkDeferredDisplayListRecorder records the drawing commands + for each tile. + + Return true if SkSurface supports characterization. raster surface returns false. + + @param characterization properties for parallel drawing + @return true if supported + + example: https://fiddle.skia.org/c/@Surface_characterize + */ + bool characterize(SkSurfaceCharacterization* characterization) const; + + /** Draws the deferred display list created via a SkDeferredDisplayListRecorder. + If the deferred display list is not compatible with this SkSurface, the draw is skipped + and false is return. + + The xOffset and yOffset parameters are experimental and, if not both zero, will cause + the draw to be ignored. + When implemented, if xOffset or yOffset are non-zero, the DDL will be drawn offset by that + amount into the surface. + + @param deferredDisplayList drawing commands + @param xOffset x-offset at which to draw the DDL + @param yOffset y-offset at which to draw the DDL + @return false if deferredDisplayList is not compatible + + example: https://fiddle.skia.org/c/@Surface_draw_2 + */ + bool draw(sk_sp deferredDisplayList, + int xOffset = 0, + int yOffset = 0); + +protected: + SkSurface(int width, int height, const SkSurfaceProps* surfaceProps); + SkSurface(const SkImageInfo& imageInfo, const SkSurfaceProps* surfaceProps); + + // called by subclass if their contents have changed + void dirtyGenerationID() { + fGenerationID = 0; + } + +private: + const SkSurfaceProps fProps; + const int fWidth; + const int fHeight; + uint32_t fGenerationID; + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkSurfaceCharacterization.h b/gfx/skia/skia/include/core/SkSurfaceCharacterization.h new file mode 100644 index 0000000000..075f601a27 --- /dev/null +++ b/gfx/skia/skia/include/core/SkSurfaceCharacterization.h @@ -0,0 +1,263 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSurfaceCharacterization_DEFINED +#define SkSurfaceCharacterization_DEFINED + + +#include "include/core/SkColorSpace.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSurfaceProps.h" + +class SkColorSpace; + + +#if defined(SK_GANESH) +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrContextThreadSafeProxy.h" +#include "include/gpu/GrTypes.h" + +/** \class SkSurfaceCharacterization + A surface characterization contains all the information Ganesh requires to makes its internal + rendering decisions. When passed into a SkDeferredDisplayListRecorder it will copy the + data and pass it on to the SkDeferredDisplayList if/when it is created. Note that both of + those objects (the Recorder and the DisplayList) will take a ref on the + GrContextThreadSafeProxy and SkColorSpace objects. +*/ +class SK_API SkSurfaceCharacterization { +public: + enum class Textureable : bool { kNo = false, kYes = true }; + enum class MipMapped : bool { kNo = false, kYes = true }; + enum class UsesGLFBO0 : bool { kNo = false, kYes = true }; + // This flag indicates that the backing VkImage for this Vulkan surface will have the + // VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT set. This bit allows skia to handle advanced blends + // more optimally in a shader by being able to directly read the dst values. + enum class VkRTSupportsInputAttachment : bool { kNo = false, kYes = true }; + // This flag indicates if the surface is wrapping a raw Vulkan secondary command buffer. + enum class VulkanSecondaryCBCompatible : bool { kNo = false, kYes = true }; + + SkSurfaceCharacterization() + : fCacheMaxResourceBytes(0) + , fOrigin(kBottomLeft_GrSurfaceOrigin) + , fSampleCnt(0) + , fIsTextureable(Textureable::kYes) + , fIsMipMapped(MipMapped::kYes) + , fUsesGLFBO0(UsesGLFBO0::kNo) + , fVulkanSecondaryCBCompatible(VulkanSecondaryCBCompatible::kNo) + , fIsProtected(GrProtected::kNo) + , fSurfaceProps(0, kUnknown_SkPixelGeometry) { + } + + SkSurfaceCharacterization(SkSurfaceCharacterization&&) = default; + SkSurfaceCharacterization& operator=(SkSurfaceCharacterization&&) = default; + + SkSurfaceCharacterization(const SkSurfaceCharacterization&) = default; + SkSurfaceCharacterization& operator=(const SkSurfaceCharacterization& other) = default; + bool operator==(const SkSurfaceCharacterization& other) const; + bool operator!=(const SkSurfaceCharacterization& other) const { + return !(*this == other); + } + + /* + * Return a new surface characterization with the only difference being a different width + * and height + */ + SkSurfaceCharacterization createResized(int width, int height) const; + + /* + * Return a new surface characterization with only a replaced color space + */ + SkSurfaceCharacterization createColorSpace(sk_sp) const; + + /* + * Return a new surface characterization with the backend format replaced. A colorType + * must also be supplied to indicate the interpretation of the new format. + */ + SkSurfaceCharacterization createBackendFormat(SkColorType colorType, + const GrBackendFormat& backendFormat) const; + + /* + * Return a new surface characterization with just a different use of FBO0 (in GL) + */ + SkSurfaceCharacterization createFBO0(bool usesGLFBO0) const; + + GrContextThreadSafeProxy* contextInfo() const { return fContextInfo.get(); } + sk_sp refContextInfo() const { return fContextInfo; } + size_t cacheMaxResourceBytes() const { return fCacheMaxResourceBytes; } + + bool isValid() const { return kUnknown_SkColorType != fImageInfo.colorType(); } + + const SkImageInfo& imageInfo() const { return fImageInfo; } + const GrBackendFormat& backendFormat() const { return fBackendFormat; } + GrSurfaceOrigin origin() const { return fOrigin; } + SkISize dimensions() const { return fImageInfo.dimensions(); } + int width() const { return fImageInfo.width(); } + int height() const { return fImageInfo.height(); } + SkColorType colorType() const { return fImageInfo.colorType(); } + int sampleCount() const { return fSampleCnt; } + bool isTextureable() const { return Textureable::kYes == fIsTextureable; } + bool isMipMapped() const { return MipMapped::kYes == fIsMipMapped; } + bool usesGLFBO0() const { return UsesGLFBO0::kYes == fUsesGLFBO0; } + bool vkRTSupportsInputAttachment() const { + return VkRTSupportsInputAttachment::kYes == fVkRTSupportsInputAttachment; + } + bool vulkanSecondaryCBCompatible() const { + return VulkanSecondaryCBCompatible::kYes == fVulkanSecondaryCBCompatible; + } + GrProtected isProtected() const { return fIsProtected; } + SkColorSpace* colorSpace() const { return fImageInfo.colorSpace(); } + sk_sp refColorSpace() const { return fImageInfo.refColorSpace(); } + const SkSurfaceProps& surfaceProps()const { return fSurfaceProps; } + + // Is the provided backend texture compatible with this surface characterization? + bool isCompatible(const GrBackendTexture&) const; + +private: + friend class SkSurface_Gpu; // for 'set' & 'config' + friend class GrVkSecondaryCBDrawContext; // for 'set' & 'config' + friend class GrContextThreadSafeProxy; // for private ctor + friend class SkDeferredDisplayListRecorder; // for 'config' + friend class SkSurface; // for 'config' + + SkDEBUGCODE(void validate() const;) + + SkSurfaceCharacterization(sk_sp contextInfo, + size_t cacheMaxResourceBytes, + const SkImageInfo& ii, + const GrBackendFormat& backendFormat, + GrSurfaceOrigin origin, + int sampleCnt, + Textureable isTextureable, + MipMapped isMipMapped, + UsesGLFBO0 usesGLFBO0, + VkRTSupportsInputAttachment vkRTSupportsInputAttachment, + VulkanSecondaryCBCompatible vulkanSecondaryCBCompatible, + GrProtected isProtected, + const SkSurfaceProps& surfaceProps) + : fContextInfo(std::move(contextInfo)) + , fCacheMaxResourceBytes(cacheMaxResourceBytes) + , fImageInfo(ii) + , fBackendFormat(backendFormat) + , fOrigin(origin) + , fSampleCnt(sampleCnt) + , fIsTextureable(isTextureable) + , fIsMipMapped(isMipMapped) + , fUsesGLFBO0(usesGLFBO0) + , fVkRTSupportsInputAttachment(vkRTSupportsInputAttachment) + , fVulkanSecondaryCBCompatible(vulkanSecondaryCBCompatible) + , fIsProtected(isProtected) + , fSurfaceProps(surfaceProps) { + if (fSurfaceProps.flags() & SkSurfaceProps::kDynamicMSAA_Flag) { + // Dynamic MSAA is not currently supported with DDL. + *this = {}; + } + SkDEBUGCODE(this->validate()); + } + + void set(sk_sp contextInfo, + size_t cacheMaxResourceBytes, + const SkImageInfo& ii, + const GrBackendFormat& backendFormat, + GrSurfaceOrigin origin, + int sampleCnt, + Textureable isTextureable, + MipMapped isMipMapped, + UsesGLFBO0 usesGLFBO0, + VkRTSupportsInputAttachment vkRTSupportsInputAttachment, + VulkanSecondaryCBCompatible vulkanSecondaryCBCompatible, + GrProtected isProtected, + const SkSurfaceProps& surfaceProps) { + if (surfaceProps.flags() & SkSurfaceProps::kDynamicMSAA_Flag) { + // Dynamic MSAA is not currently supported with DDL. + *this = {}; + } else { + fContextInfo = contextInfo; + fCacheMaxResourceBytes = cacheMaxResourceBytes; + + fImageInfo = ii; + fBackendFormat = backendFormat; + fOrigin = origin; + fSampleCnt = sampleCnt; + fIsTextureable = isTextureable; + fIsMipMapped = isMipMapped; + fUsesGLFBO0 = usesGLFBO0; + fVkRTSupportsInputAttachment = vkRTSupportsInputAttachment; + fVulkanSecondaryCBCompatible = vulkanSecondaryCBCompatible; + fIsProtected = isProtected; + fSurfaceProps = surfaceProps; + } + SkDEBUGCODE(this->validate()); + } + + sk_sp fContextInfo; + size_t fCacheMaxResourceBytes; + + SkImageInfo fImageInfo; + GrBackendFormat fBackendFormat; + GrSurfaceOrigin fOrigin; + int fSampleCnt; + Textureable fIsTextureable; + MipMapped fIsMipMapped; + UsesGLFBO0 fUsesGLFBO0; + VkRTSupportsInputAttachment fVkRTSupportsInputAttachment; + VulkanSecondaryCBCompatible fVulkanSecondaryCBCompatible; + GrProtected fIsProtected; + SkSurfaceProps fSurfaceProps; +}; + +#else// !defined(SK_GANESH) +class GrBackendFormat; + +class SK_API SkSurfaceCharacterization { +public: + SkSurfaceCharacterization() : fSurfaceProps(0, kUnknown_SkPixelGeometry) { } + + SkSurfaceCharacterization createResized(int width, int height) const { + return *this; + } + + SkSurfaceCharacterization createColorSpace(sk_sp) const { + return *this; + } + + SkSurfaceCharacterization createBackendFormat(SkColorType, const GrBackendFormat&) const { + return *this; + } + + SkSurfaceCharacterization createFBO0(bool usesGLFBO0) const { + return *this; + } + + bool operator==(const SkSurfaceCharacterization& other) const { return false; } + bool operator!=(const SkSurfaceCharacterization& other) const { + return !(*this == other); + } + + size_t cacheMaxResourceBytes() const { return 0; } + + bool isValid() const { return false; } + + int width() const { return 0; } + int height() const { return 0; } + int stencilCount() const { return 0; } + bool isTextureable() const { return false; } + bool isMipMapped() const { return false; } + bool usesGLFBO0() const { return false; } + bool vkRTSupportsAttachmentInput() const { return false; } + bool vulkanSecondaryCBCompatible() const { return false; } + SkColorSpace* colorSpace() const { return nullptr; } + sk_sp refColorSpace() const { return nullptr; } + const SkSurfaceProps& surfaceProps()const { return fSurfaceProps; } + +private: + SkSurfaceProps fSurfaceProps; +}; + +#endif + +#endif diff --git a/gfx/skia/skia/include/core/SkSurfaceProps.h b/gfx/skia/skia/include/core/SkSurfaceProps.h new file mode 100644 index 0000000000..357af25dec --- /dev/null +++ b/gfx/skia/skia/include/core/SkSurfaceProps.h @@ -0,0 +1,93 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSurfaceProps_DEFINED +#define SkSurfaceProps_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" + +/** + * Description of how the LCD strips are arranged for each pixel. If this is unknown, or the + * pixels are meant to be "portable" and/or transformed before showing (e.g. rotated, scaled) + * then use kUnknown_SkPixelGeometry. + */ +enum SkPixelGeometry { + kUnknown_SkPixelGeometry, + kRGB_H_SkPixelGeometry, + kBGR_H_SkPixelGeometry, + kRGB_V_SkPixelGeometry, + kBGR_V_SkPixelGeometry, +}; + +// Returns true iff geo is a known geometry and is RGB. +static inline bool SkPixelGeometryIsRGB(SkPixelGeometry geo) { + return kRGB_H_SkPixelGeometry == geo || kRGB_V_SkPixelGeometry == geo; +} + +// Returns true iff geo is a known geometry and is BGR. +static inline bool SkPixelGeometryIsBGR(SkPixelGeometry geo) { + return kBGR_H_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo; +} + +// Returns true iff geo is a known geometry and is horizontal. +static inline bool SkPixelGeometryIsH(SkPixelGeometry geo) { + return kRGB_H_SkPixelGeometry == geo || kBGR_H_SkPixelGeometry == geo; +} + +// Returns true iff geo is a known geometry and is vertical. +static inline bool SkPixelGeometryIsV(SkPixelGeometry geo) { + return kRGB_V_SkPixelGeometry == geo || kBGR_V_SkPixelGeometry == geo; +} + +/** + * Describes properties and constraints of a given SkSurface. The rendering engine can parse these + * during drawing, and can sometimes optimize its performance (e.g. disabling an expensive + * feature). + */ +class SK_API SkSurfaceProps { +public: + enum Flags { + kUseDeviceIndependentFonts_Flag = 1 << 0, + // Use internal MSAA to render to non-MSAA GPU surfaces. + kDynamicMSAA_Flag = 1 << 1 + }; + /** Deprecated alias used by Chromium. Will be removed. */ + static const Flags kUseDistanceFieldFonts_Flag = kUseDeviceIndependentFonts_Flag; + + /** No flags, unknown pixel geometry. */ + SkSurfaceProps(); + SkSurfaceProps(uint32_t flags, SkPixelGeometry); + + SkSurfaceProps(const SkSurfaceProps&); + SkSurfaceProps& operator=(const SkSurfaceProps&); + + SkSurfaceProps cloneWithPixelGeometry(SkPixelGeometry newPixelGeometry) const { + return SkSurfaceProps(fFlags, newPixelGeometry); + } + + uint32_t flags() const { return fFlags; } + SkPixelGeometry pixelGeometry() const { return fPixelGeometry; } + + bool isUseDeviceIndependentFonts() const { + return SkToBool(fFlags & kUseDeviceIndependentFonts_Flag); + } + + bool operator==(const SkSurfaceProps& that) const { + return fFlags == that.fFlags && fPixelGeometry == that.fPixelGeometry; + } + + bool operator!=(const SkSurfaceProps& that) const { + return !(*this == that); + } + +private: + uint32_t fFlags; + SkPixelGeometry fPixelGeometry; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkSwizzle.h b/gfx/skia/skia/include/core/SkSwizzle.h new file mode 100644 index 0000000000..61e93b2da7 --- /dev/null +++ b/gfx/skia/skia/include/core/SkSwizzle.h @@ -0,0 +1,19 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSwizzle_DEFINED +#define SkSwizzle_DEFINED + +#include "include/core/SkTypes.h" + +/** + Swizzles byte order of |count| 32-bit pixels, swapping R and B. + (RGBA <-> BGRA) +*/ +SK_API void SkSwapRB(uint32_t* dest, const uint32_t* src, int count); + +#endif diff --git a/gfx/skia/skia/include/core/SkTextBlob.h b/gfx/skia/skia/include/core/SkTextBlob.h new file mode 100644 index 0000000000..8f6cb01c04 --- /dev/null +++ b/gfx/skia/skia/include/core/SkTextBlob.h @@ -0,0 +1,506 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTextBlob_DEFINED +#define SkTextBlob_DEFINED + +#include "include/core/SkFont.h" +#include "include/core/SkPaint.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkString.h" +#include "include/private/base/SkTemplates.h" + +#include + +struct SkRSXform; +struct SkSerialProcs; +struct SkDeserialProcs; + +namespace sktext { +class GlyphRunList; +} + +/** \class SkTextBlob + SkTextBlob combines multiple text runs into an immutable container. Each text + run consists of glyphs, SkPaint, and position. Only parts of SkPaint related to + fonts and text rendering are used by run. +*/ +class SK_API SkTextBlob final : public SkNVRefCnt { +private: + class RunRecord; + +public: + + /** Returns conservative bounding box. Uses SkPaint associated with each glyph to + determine glyph bounds, and unions all bounds. Returned bounds may be + larger than the bounds of all glyphs in runs. + + @return conservative bounding box + */ + const SkRect& bounds() const { return fBounds; } + + /** Returns a non-zero value unique among all text blobs. + + @return identifier for SkTextBlob + */ + uint32_t uniqueID() const { return fUniqueID; } + + /** Returns the number of intervals that intersect bounds. + bounds describes a pair of lines parallel to the text advance. + The return count is zero or a multiple of two, and is at most twice the number of glyphs in + the the blob. + + Pass nullptr for intervals to determine the size of the interval array. + + Runs within the blob that contain SkRSXform are ignored when computing intercepts. + + @param bounds lower and upper line parallel to the advance + @param intervals returned intersections; may be nullptr + @param paint specifies stroking, SkPathEffect that affects the result; may be nullptr + @return number of intersections; may be zero + */ + int getIntercepts(const SkScalar bounds[2], SkScalar intervals[], + const SkPaint* paint = nullptr) const; + + /** Creates SkTextBlob with a single run. + + font contains attributes used to define the run text. + + When encoding is SkTextEncoding::kUTF8, SkTextEncoding::kUTF16, or + SkTextEncoding::kUTF32, this function uses the default + character-to-glyph mapping from the SkTypeface in font. It does not + perform typeface fallback for characters not found in the SkTypeface. + It does not perform kerning or other complex shaping; glyphs are + positioned based on their default advances. + + @param text character code points or glyphs drawn + @param byteLength byte length of text array + @param font text size, typeface, text scale, and so on, used to draw + @param encoding text encoding used in the text array + @return SkTextBlob constructed from one run + */ + static sk_sp MakeFromText(const void* text, size_t byteLength, const SkFont& font, + SkTextEncoding encoding = SkTextEncoding::kUTF8); + + /** Creates SkTextBlob with a single run. string meaning depends on SkTextEncoding; + by default, string is encoded as UTF-8. + + font contains attributes used to define the run text. + + When encoding is SkTextEncoding::kUTF8, SkTextEncoding::kUTF16, or + SkTextEncoding::kUTF32, this function uses the default + character-to-glyph mapping from the SkTypeface in font. It does not + perform typeface fallback for characters not found in the SkTypeface. + It does not perform kerning or other complex shaping; glyphs are + positioned based on their default advances. + + @param string character code points or glyphs drawn + @param font text size, typeface, text scale, and so on, used to draw + @param encoding text encoding used in the text array + @return SkTextBlob constructed from one run + */ + static sk_sp MakeFromString(const char* string, const SkFont& font, + SkTextEncoding encoding = SkTextEncoding::kUTF8) { + if (!string) { + return nullptr; + } + return MakeFromText(string, strlen(string), font, encoding); + } + + /** Returns a textblob built from a single run of text with x-positions and a single y value. + This is equivalent to using SkTextBlobBuilder and calling allocRunPosH(). + Returns nullptr if byteLength is zero. + + @param text character code points or glyphs drawn (based on encoding) + @param byteLength byte length of text array + @param xpos array of x-positions, must contain values for all of the character points. + @param constY shared y-position for each character point, to be paired with each xpos. + @param font SkFont used for this run + @param encoding specifies the encoding of the text array. + @return new textblob or nullptr + */ + static sk_sp MakeFromPosTextH(const void* text, size_t byteLength, + const SkScalar xpos[], SkScalar constY, const SkFont& font, + SkTextEncoding encoding = SkTextEncoding::kUTF8); + + /** Returns a textblob built from a single run of text with positions. + This is equivalent to using SkTextBlobBuilder and calling allocRunPos(). + Returns nullptr if byteLength is zero. + + @param text character code points or glyphs drawn (based on encoding) + @param byteLength byte length of text array + @param pos array of positions, must contain values for all of the character points. + @param font SkFont used for this run + @param encoding specifies the encoding of the text array. + @return new textblob or nullptr + */ + static sk_sp MakeFromPosText(const void* text, size_t byteLength, + const SkPoint pos[], const SkFont& font, + SkTextEncoding encoding = SkTextEncoding::kUTF8); + + static sk_sp MakeFromRSXform(const void* text, size_t byteLength, + const SkRSXform xform[], const SkFont& font, + SkTextEncoding encoding = SkTextEncoding::kUTF8); + + /** Writes data to allow later reconstruction of SkTextBlob. memory points to storage + to receive the encoded data, and memory_size describes the size of storage. + Returns bytes used if provided storage is large enough to hold all data; + otherwise, returns zero. + + procs.fTypefaceProc permits supplying a custom function to encode SkTypeface. + If procs.fTypefaceProc is nullptr, default encoding is used. procs.fTypefaceCtx + may be used to provide user context to procs.fTypefaceProc; procs.fTypefaceProc + is called with a pointer to SkTypeface and user context. + + @param procs custom serial data encoders; may be nullptr + @param memory storage for data + @param memory_size size of storage + @return bytes written, or zero if required storage is larger than memory_size + + example: https://fiddle.skia.org/c/@TextBlob_serialize + */ + size_t serialize(const SkSerialProcs& procs, void* memory, size_t memory_size) const; + + /** Returns storage containing SkData describing SkTextBlob, using optional custom + encoders. + + procs.fTypefaceProc permits supplying a custom function to encode SkTypeface. + If procs.fTypefaceProc is nullptr, default encoding is used. procs.fTypefaceCtx + may be used to provide user context to procs.fTypefaceProc; procs.fTypefaceProc + is called with a pointer to SkTypeface and user context. + + @param procs custom serial data encoders; may be nullptr + @return storage containing serialized SkTextBlob + + example: https://fiddle.skia.org/c/@TextBlob_serialize_2 + */ + sk_sp serialize(const SkSerialProcs& procs) const; + + /** Recreates SkTextBlob that was serialized into data. Returns constructed SkTextBlob + if successful; otherwise, returns nullptr. Fails if size is smaller than + required data length, or if data does not permit constructing valid SkTextBlob. + + procs.fTypefaceProc permits supplying a custom function to decode SkTypeface. + If procs.fTypefaceProc is nullptr, default decoding is used. procs.fTypefaceCtx + may be used to provide user context to procs.fTypefaceProc; procs.fTypefaceProc + is called with a pointer to SkTypeface data, data byte length, and user context. + + @param data pointer for serial data + @param size size of data + @param procs custom serial data decoders; may be nullptr + @return SkTextBlob constructed from data in memory + */ + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs& procs); + + class SK_API Iter { + public: + struct Run { + SkTypeface* fTypeface; + int fGlyphCount; + const uint16_t* fGlyphIndices; +#ifdef SK_UNTIL_CRBUG_1187654_IS_FIXED + const uint32_t* fClusterIndex_forTest; + int fUtf8Size_forTest; + const char* fUtf8_forTest; +#endif + }; + + Iter(const SkTextBlob&); + + /** + * Returns true for each "run" inside the textblob, setting the Run fields (if not null). + * If this returns false, there are no more runs, and the Run parameter will be ignored. + */ + bool next(Run*); + + // Experimental, DO NO USE, will change/go-away + struct ExperimentalRun { + SkFont font; + int count; + const uint16_t* glyphs; + const SkPoint* positions; + }; + bool experimentalNext(ExperimentalRun*); + + private: + const RunRecord* fRunRecord; + }; + +private: + friend class SkNVRefCnt; + + enum GlyphPositioning : uint8_t; + + explicit SkTextBlob(const SkRect& bounds); + + ~SkTextBlob(); + + // Memory for objects of this class is created with sk_malloc rather than operator new and must + // be freed with sk_free. + void operator delete(void* p); + void* operator new(size_t); + void* operator new(size_t, void* p); + + static unsigned ScalarsPerGlyph(GlyphPositioning pos); + + // Call when this blob is part of the key to a cache entry. This allows the cache + // to know automatically those entries can be purged when this SkTextBlob is deleted. + void notifyAddedToCache(uint32_t cacheID) const { + fCacheID.store(cacheID); + } + + friend class sktext::GlyphRunList; + friend class SkTextBlobBuilder; + friend class SkTextBlobPriv; + friend class SkTextBlobRunIterator; + + const SkRect fBounds; + const uint32_t fUniqueID; + mutable std::atomic fCacheID; + + SkDEBUGCODE(size_t fStorageSize;) + + // The actual payload resides in externally-managed storage, following the object. + // (see the .cpp for more details) + + using INHERITED = SkRefCnt; +}; + +/** \class SkTextBlobBuilder + Helper class for constructing SkTextBlob. +*/ +class SK_API SkTextBlobBuilder { +public: + + /** Constructs empty SkTextBlobBuilder. By default, SkTextBlobBuilder has no runs. + + @return empty SkTextBlobBuilder + + example: https://fiddle.skia.org/c/@TextBlobBuilder_empty_constructor + */ + SkTextBlobBuilder(); + + /** Deletes data allocated internally by SkTextBlobBuilder. + */ + ~SkTextBlobBuilder(); + + /** Returns SkTextBlob built from runs of glyphs added by builder. Returned + SkTextBlob is immutable; it may be copied, but its contents may not be altered. + Returns nullptr if no runs of glyphs were added by builder. + + Resets SkTextBlobBuilder to its initial empty state, allowing it to be + reused to build a new set of runs. + + @return SkTextBlob or nullptr + + example: https://fiddle.skia.org/c/@TextBlobBuilder_make + */ + sk_sp make(); + + /** \struct SkTextBlobBuilder::RunBuffer + RunBuffer supplies storage for glyphs and positions within a run. + + A run is a sequence of glyphs sharing font metrics and positioning. + Each run may position its glyphs in one of three ways: + by specifying where the first glyph is drawn, and allowing font metrics to + determine the advance to subsequent glyphs; by specifying a baseline, and + the position on that baseline for each glyph in run; or by providing SkPoint + array, one per glyph. + */ + struct RunBuffer { + SkGlyphID* glyphs; //!< storage for glyph indexes in run + SkScalar* pos; //!< storage for glyph positions in run + char* utf8text; //!< storage for text UTF-8 code units in run + uint32_t* clusters; //!< storage for glyph clusters (index of UTF-8 code unit) + + // Helpers, since the "pos" field can be different types (always some number of floats). + SkPoint* points() const { return reinterpret_cast(pos); } + SkRSXform* xforms() const { return reinterpret_cast(pos); } + }; + + /** Returns run with storage for glyphs. Caller must write count glyphs to + RunBuffer::glyphs before next call to SkTextBlobBuilder. + + RunBuffer::pos, RunBuffer::utf8text, and RunBuffer::clusters should be ignored. + + Glyphs share metrics in font. + + Glyphs are positioned on a baseline at (x, y), using font metrics to + determine their relative placement. + + bounds defines an optional bounding box, used to suppress drawing when SkTextBlob + bounds does not intersect SkSurface bounds. If bounds is nullptr, SkTextBlob bounds + is computed from (x, y) and RunBuffer::glyphs metrics. + + @param font SkFont used for this run + @param count number of glyphs + @param x horizontal offset within the blob + @param y vertical offset within the blob + @param bounds optional run bounding box + @return writable glyph buffer + */ + const RunBuffer& allocRun(const SkFont& font, int count, SkScalar x, SkScalar y, + const SkRect* bounds = nullptr); + + /** Returns run with storage for glyphs and positions along baseline. Caller must + write count glyphs to RunBuffer::glyphs and count scalars to RunBuffer::pos + before next call to SkTextBlobBuilder. + + RunBuffer::utf8text and RunBuffer::clusters should be ignored. + + Glyphs share metrics in font. + + Glyphs are positioned on a baseline at y, using x-axis positions written by + caller to RunBuffer::pos. + + bounds defines an optional bounding box, used to suppress drawing when SkTextBlob + bounds does not intersect SkSurface bounds. If bounds is nullptr, SkTextBlob bounds + is computed from y, RunBuffer::pos, and RunBuffer::glyphs metrics. + + @param font SkFont used for this run + @param count number of glyphs + @param y vertical offset within the blob + @param bounds optional run bounding box + @return writable glyph buffer and x-axis position buffer + */ + const RunBuffer& allocRunPosH(const SkFont& font, int count, SkScalar y, + const SkRect* bounds = nullptr); + + /** Returns run with storage for glyphs and SkPoint positions. Caller must + write count glyphs to RunBuffer::glyphs and count SkPoint to RunBuffer::pos + before next call to SkTextBlobBuilder. + + RunBuffer::utf8text and RunBuffer::clusters should be ignored. + + Glyphs share metrics in font. + + Glyphs are positioned using SkPoint written by caller to RunBuffer::pos, using + two scalar values for each SkPoint. + + bounds defines an optional bounding box, used to suppress drawing when SkTextBlob + bounds does not intersect SkSurface bounds. If bounds is nullptr, SkTextBlob bounds + is computed from RunBuffer::pos, and RunBuffer::glyphs metrics. + + @param font SkFont used for this run + @param count number of glyphs + @param bounds optional run bounding box + @return writable glyph buffer and SkPoint buffer + */ + const RunBuffer& allocRunPos(const SkFont& font, int count, + const SkRect* bounds = nullptr); + + // RunBuffer.pos points to SkRSXform array + const RunBuffer& allocRunRSXform(const SkFont& font, int count); + + /** Returns run with storage for glyphs, text, and clusters. Caller must + write count glyphs to RunBuffer::glyphs, textByteCount UTF-8 code units + into RunBuffer::utf8text, and count monotonic indexes into utf8text + into RunBuffer::clusters before next call to SkTextBlobBuilder. + + RunBuffer::pos should be ignored. + + Glyphs share metrics in font. + + Glyphs are positioned on a baseline at (x, y), using font metrics to + determine their relative placement. + + bounds defines an optional bounding box, used to suppress drawing when SkTextBlob + bounds does not intersect SkSurface bounds. If bounds is nullptr, SkTextBlob bounds + is computed from (x, y) and RunBuffer::glyphs metrics. + + @param font SkFont used for this run + @param count number of glyphs + @param x horizontal offset within the blob + @param y vertical offset within the blob + @param textByteCount number of UTF-8 code units + @param bounds optional run bounding box + @return writable glyph buffer, text buffer, and cluster buffer + */ + const RunBuffer& allocRunText(const SkFont& font, int count, SkScalar x, SkScalar y, + int textByteCount, const SkRect* bounds = nullptr); + + /** Returns run with storage for glyphs, positions along baseline, text, + and clusters. Caller must write count glyphs to RunBuffer::glyphs, + count scalars to RunBuffer::pos, textByteCount UTF-8 code units into + RunBuffer::utf8text, and count monotonic indexes into utf8text into + RunBuffer::clusters before next call to SkTextBlobBuilder. + + Glyphs share metrics in font. + + Glyphs are positioned on a baseline at y, using x-axis positions written by + caller to RunBuffer::pos. + + bounds defines an optional bounding box, used to suppress drawing when SkTextBlob + bounds does not intersect SkSurface bounds. If bounds is nullptr, SkTextBlob bounds + is computed from y, RunBuffer::pos, and RunBuffer::glyphs metrics. + + @param font SkFont used for this run + @param count number of glyphs + @param y vertical offset within the blob + @param textByteCount number of UTF-8 code units + @param bounds optional run bounding box + @return writable glyph buffer, x-axis position buffer, text buffer, and cluster buffer + */ + const RunBuffer& allocRunTextPosH(const SkFont& font, int count, SkScalar y, int textByteCount, + const SkRect* bounds = nullptr); + + /** Returns run with storage for glyphs, SkPoint positions, text, and + clusters. Caller must write count glyphs to RunBuffer::glyphs, count + SkPoint to RunBuffer::pos, textByteCount UTF-8 code units into + RunBuffer::utf8text, and count monotonic indexes into utf8text into + RunBuffer::clusters before next call to SkTextBlobBuilder. + + Glyphs share metrics in font. + + Glyphs are positioned using SkPoint written by caller to RunBuffer::pos, using + two scalar values for each SkPoint. + + bounds defines an optional bounding box, used to suppress drawing when SkTextBlob + bounds does not intersect SkSurface bounds. If bounds is nullptr, SkTextBlob bounds + is computed from RunBuffer::pos, and RunBuffer::glyphs metrics. + + @param font SkFont used for this run + @param count number of glyphs + @param textByteCount number of UTF-8 code units + @param bounds optional run bounding box + @return writable glyph buffer, SkPoint buffer, text buffer, and cluster buffer + */ + const RunBuffer& allocRunTextPos(const SkFont& font, int count, int textByteCount, + const SkRect* bounds = nullptr); + + // RunBuffer.pos points to SkRSXform array + const RunBuffer& allocRunTextRSXform(const SkFont& font, int count, int textByteCount, + const SkRect* bounds = nullptr); + +private: + void reserve(size_t size); + void allocInternal(const SkFont& font, SkTextBlob::GlyphPositioning positioning, + int count, int textBytes, SkPoint offset, const SkRect* bounds); + bool mergeRun(const SkFont& font, SkTextBlob::GlyphPositioning positioning, + uint32_t count, SkPoint offset); + void updateDeferredBounds(); + + static SkRect ConservativeRunBounds(const SkTextBlob::RunRecord&); + static SkRect TightRunBounds(const SkTextBlob::RunRecord&); + + friend class SkTextBlobPriv; + friend class SkTextBlobBuilderPriv; + + skia_private::AutoTMalloc fStorage; + size_t fStorageSize; + size_t fStorageUsed; + + SkRect fBounds; + int fRunCount; + bool fDeferredBounds; + size_t fLastRun; // index into fStorage + + RunBuffer fCurrentRunBuffer; +}; + +#endif // SkTextBlob_DEFINED diff --git a/gfx/skia/skia/include/core/SkTextureCompressionType.h b/gfx/skia/skia/include/core/SkTextureCompressionType.h new file mode 100644 index 0000000000..e9b441378d --- /dev/null +++ b/gfx/skia/skia/include/core/SkTextureCompressionType.h @@ -0,0 +1,30 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTextureCompressionType_DEFINED +#define SkTextureCompressionType_DEFINED +/* + * Skia | GL_COMPRESSED_* | MTLPixelFormat* | VK_FORMAT_*_BLOCK + * -------------------------------------------------------------------------------------- + * kETC2_RGB8_UNORM | ETC1_RGB8 | ETC2_RGB8 (iOS-only) | ETC2_R8G8B8_UNORM + * | RGB8_ETC2 | | + * -------------------------------------------------------------------------------------- + * kBC1_RGB8_UNORM | RGB_S3TC_DXT1_EXT | N/A | BC1_RGB_UNORM + * -------------------------------------------------------------------------------------- + * kBC1_RGBA8_UNORM | RGBA_S3TC_DXT1_EXT | BC1_RGBA (macOS-only)| BC1_RGBA_UNORM + */ +enum class SkTextureCompressionType { + kNone, + kETC2_RGB8_UNORM, + + kBC1_RGB8_UNORM, + kBC1_RGBA8_UNORM, + kLast = kBC1_RGBA8_UNORM, + kETC1_RGB8 = kETC2_RGB8_UNORM, +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkTileMode.h b/gfx/skia/skia/include/core/SkTileMode.h new file mode 100644 index 0000000000..8a9d020958 --- /dev/null +++ b/gfx/skia/skia/include/core/SkTileMode.h @@ -0,0 +1,41 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTileModes_DEFINED +#define SkTileModes_DEFINED + +#include "include/core/SkTypes.h" + +enum class SkTileMode { + /** + * Replicate the edge color if the shader draws outside of its + * original bounds. + */ + kClamp, + + /** + * Repeat the shader's image horizontally and vertically. + */ + kRepeat, + + /** + * Repeat the shader's image horizontally and vertically, alternating + * mirror images so that adjacent images always seam. + */ + kMirror, + + /** + * Only draw within the original domain, return transparent-black everywhere else. + */ + kDecal, + + kLastTileMode = kDecal, +}; + +static constexpr int kSkTileModeCount = static_cast(SkTileMode::kLastTileMode) + 1; + +#endif diff --git a/gfx/skia/skia/include/core/SkTime.h b/gfx/skia/skia/include/core/SkTime.h new file mode 100644 index 0000000000..9135c7e113 --- /dev/null +++ b/gfx/skia/skia/include/core/SkTime.h @@ -0,0 +1,63 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkTime_DEFINED +#define SkTime_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkMacros.h" + +#include + +class SkString; + +/** \class SkTime + Platform-implemented utilities to return time of day, and millisecond counter. +*/ +class SK_API SkTime { +public: + struct DateTime { + int16_t fTimeZoneMinutes; // The number of minutes that GetDateTime() + // is ahead of or behind UTC. + uint16_t fYear; //!< e.g. 2005 + uint8_t fMonth; //!< 1..12 + uint8_t fDayOfWeek; //!< 0..6, 0==Sunday + uint8_t fDay; //!< 1..31 + uint8_t fHour; //!< 0..23 + uint8_t fMinute; //!< 0..59 + uint8_t fSecond; //!< 0..59 + + void toISO8601(SkString* dst) const; + }; + static void GetDateTime(DateTime*); + + static double GetSecs() { return GetNSecs() * 1e-9; } + static double GetMSecs() { return GetNSecs() * 1e-6; } + static double GetNSecs(); +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkAutoTime { +public: + // The label is not deep-copied, so its address must remain valid for the + // lifetime of this object + SkAutoTime(const char* label = nullptr) + : fLabel(label) + , fNow(SkTime::GetMSecs()) {} + ~SkAutoTime() { + uint64_t dur = static_cast(SkTime::GetMSecs() - fNow); + SkDebugf("%s %" PRIu64 "\n", fLabel ? fLabel : "", dur); + } +private: + const char* fLabel; + double fNow; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkTraceMemoryDump.h b/gfx/skia/skia/include/core/SkTraceMemoryDump.h new file mode 100644 index 0000000000..7837bfbd89 --- /dev/null +++ b/gfx/skia/skia/include/core/SkTraceMemoryDump.h @@ -0,0 +1,99 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTraceMemoryDump_DEFINED +#define SkTraceMemoryDump_DEFINED + +#include "include/core/SkTypes.h" + +class SkDiscardableMemory; + +/** + * Interface for memory tracing. + * This interface is meant to be passed as argument to the memory dump methods of Skia objects. + * The implementation of this interface is provided by the embedder. + */ +class SK_API SkTraceMemoryDump { +public: + /** + * Enum to specify the level of the requested details for the dump from the Skia objects. + */ + enum LevelOfDetail { + // Dump only the minimal details to get the total memory usage (Usually just the totals). + kLight_LevelOfDetail, + + // Dump the detailed breakdown of the objects in the caches. + kObjectsBreakdowns_LevelOfDetail + }; + + /** + * Appends a new memory dump (i.e. a row) to the trace memory infrastructure. + * If dumpName does not exist yet, a new one is created. Otherwise, a new column is appended to + * the previously created dump. + * Arguments: + * dumpName: an absolute, slash-separated, name for the item being dumped + * e.g., "skia/CacheX/EntryY". + * valueName: a string indicating the name of the column. + * e.g., "size", "active_size", "number_of_objects". + * This string is supposed to be long lived and is NOT copied. + * units: a string indicating the units for the value. + * e.g., "bytes", "objects". + * This string is supposed to be long lived and is NOT copied. + * value: the actual value being dumped. + */ + virtual void dumpNumericValue(const char* dumpName, + const char* valueName, + const char* units, + uint64_t value) = 0; + + virtual void dumpStringValue(const char* /*dumpName*/, + const char* /*valueName*/, + const char* /*value*/) { } + + /** + * Sets the memory backing for an existing dump. + * backingType and backingObjectId are used by the embedder to associate the memory dumped via + * dumpNumericValue with the corresponding dump that backs the memory. + */ + virtual void setMemoryBacking(const char* dumpName, + const char* backingType, + const char* backingObjectId) = 0; + + /** + * Specialization for memory backed by discardable memory. + */ + virtual void setDiscardableMemoryBacking( + const char* dumpName, + const SkDiscardableMemory& discardableMemoryObject) = 0; + + /** + * Returns the type of details requested in the dump. The granularity of the dump is supposed to + * match the LevelOfDetail argument. The level of detail must not affect the total size + * reported, but only granularity of the child entries. + */ + virtual LevelOfDetail getRequestedDetails() const = 0; + + /** + * Returns true if we should dump wrapped objects. Wrapped objects come from outside Skia, and + * may be independently tracked there. + */ + virtual bool shouldDumpWrappedObjects() const { return true; } + + /** + * If shouldDumpWrappedObjects() returns true then this function will be called to populate + * the output with information on whether the item being dumped is a wrapped object. + */ + virtual void dumpWrappedState(const char* /*dumpName*/, bool /*isWrappedObject*/) {} + +protected: + virtual ~SkTraceMemoryDump() = default; + SkTraceMemoryDump() = default; + SkTraceMemoryDump(const SkTraceMemoryDump&) = delete; + SkTraceMemoryDump& operator=(const SkTraceMemoryDump&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkTypeface.h b/gfx/skia/skia/include/core/SkTypeface.h new file mode 100644 index 0000000000..e06b9bfa8b --- /dev/null +++ b/gfx/skia/skia/include/core/SkTypeface.h @@ -0,0 +1,483 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTypeface_DEFINED +#define SkTypeface_DEFINED + +#include "include/core/SkFontArguments.h" +#include "include/core/SkFontParameters.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkFontTypes.h" +#include "include/core/SkRect.h" +#include "include/core/SkString.h" +#include "include/private/SkWeakRefCnt.h" +#include "include/private/base/SkOnce.h" + +class SkData; +class SkDescriptor; +class SkFontData; +class SkFontDescriptor; +class SkScalerContext; +class SkStream; +class SkStreamAsset; +class SkWStream; +struct SkAdvancedTypefaceMetrics; +struct SkScalerContextEffects; +struct SkScalerContextRec; + +using SkTypefaceID = uint32_t; + +// SkFontID is deprecated, please use SkTypefaceID. +using SkFontID = SkTypefaceID; + + +/** Machine endian. */ +typedef uint32_t SkFontTableTag; + +/** \class SkTypeface + + The SkTypeface class specifies the typeface and intrinsic style of a font. + This is used in the paint, along with optionally algorithmic settings like + textSize, textSkewX, textScaleX, kFakeBoldText_Mask, to specify + how text appears when drawn (and measured). + + Typeface objects are immutable, and so they can be shared between threads. +*/ +class SK_API SkTypeface : public SkWeakRefCnt { +public: + /** Returns the typeface's intrinsic style attributes. */ + SkFontStyle fontStyle() const { + return fStyle; + } + + /** Returns true if style() has the kBold bit set. */ + bool isBold() const { return fStyle.weight() >= SkFontStyle::kSemiBold_Weight; } + + /** Returns true if style() has the kItalic bit set. */ + bool isItalic() const { return fStyle.slant() != SkFontStyle::kUpright_Slant; } + + /** Returns true if the typeface claims to be fixed-pitch. + * This is a style bit, advance widths may vary even if this returns true. + */ + bool isFixedPitch() const { return fIsFixedPitch; } + + /** Copy into 'coordinates' (allocated by the caller) the design variation coordinates. + * + * @param coordinates the buffer into which to write the design variation coordinates. + * @param coordinateCount the number of entries available through 'coordinates'. + * + * @return The number of axes, or -1 if there is an error. + * If 'coordinates != nullptr' and 'coordinateCount >= numAxes' then 'coordinates' will be + * filled with the variation coordinates describing the position of this typeface in design + * variation space. It is possible the number of axes can be retrieved but actual position + * cannot. + */ + int getVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const; + + /** Copy into 'parameters' (allocated by the caller) the design variation parameters. + * + * @param parameters the buffer into which to write the design variation parameters. + * @param coordinateCount the number of entries available through 'parameters'. + * + * @return The number of axes, or -1 if there is an error. + * If 'parameters != nullptr' and 'parameterCount >= numAxes' then 'parameters' will be + * filled with the variation parameters describing the position of this typeface in design + * variation space. It is possible the number of axes can be retrieved but actual parameters + * cannot. + */ + int getVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const; + + /** Return a 32bit value for this typeface, unique for the underlying font + data. Will never return 0. + */ + SkTypefaceID uniqueID() const { return fUniqueID; } + + /** Return the uniqueID for the specified typeface. If the face is null, + resolve it to the default font and return its uniqueID. Will never + return 0. + */ + static SkTypefaceID UniqueID(const SkTypeface* face); + + /** Returns true if the two typefaces reference the same underlying font, + handling either being null (treating null as the default font) + */ + static bool Equal(const SkTypeface* facea, const SkTypeface* faceb); + + /** Returns the default normal typeface, which is never nullptr. */ + static sk_sp MakeDefault(); + + /** Creates a new reference to the typeface that most closely matches the + requested familyName and fontStyle. This method allows extended font + face specifiers as in the SkFontStyle type. Will never return null. + + @param familyName May be NULL. The name of the font family. + @param fontStyle The style of the typeface. + @return reference to the closest-matching typeface. Call must call + unref() when they are done. + */ + static sk_sp MakeFromName(const char familyName[], SkFontStyle fontStyle); + + /** Return a new typeface given a file. If the file does not exist, or is + not a valid font file, returns nullptr. + */ + static sk_sp MakeFromFile(const char path[], int index = 0); + + /** Return a new typeface given a stream. If the stream is + not a valid font file, returns nullptr. Ownership of the stream is + transferred, so the caller must not reference it again. + */ + static sk_sp MakeFromStream(std::unique_ptr stream, int index = 0); + + /** Return a new typeface given a SkData. If the data is null, or is not a valid font file, + * returns nullptr. + */ + static sk_sp MakeFromData(sk_sp, int index = 0); + + /** Return a new typeface based on this typeface but parameterized as specified in the + SkFontArguments. If the SkFontArguments does not supply an argument for a parameter + in the font then the value from this typeface will be used as the value for that + argument. If the cloned typeface would be exaclty the same as this typeface then + this typeface may be ref'ed and returned. May return nullptr on failure. + */ + sk_sp makeClone(const SkFontArguments&) const; + + /** + * A typeface can serialize just a descriptor (names, etc.), or it can also include the + * actual font data (which can be large). This enum controls how serialize() decides what + * to serialize. + */ + enum class SerializeBehavior { + kDoIncludeData, + kDontIncludeData, + kIncludeDataIfLocal, + }; + + /** Write a unique signature to a stream, sufficient to reconstruct a + typeface referencing the same font when Deserialize is called. + */ + void serialize(SkWStream*, SerializeBehavior = SerializeBehavior::kIncludeDataIfLocal) const; + + /** + * Same as serialize(SkWStream*, ...) but returns the serialized data in SkData, instead of + * writing it to a stream. + */ + sk_sp serialize(SerializeBehavior = SerializeBehavior::kIncludeDataIfLocal) const; + + /** Given the data previously written by serialize(), return a new instance + of a typeface referring to the same font. If that font is not available, + return nullptr. + Does not affect ownership of SkStream. + */ + static sk_sp MakeDeserialize(SkStream*); + + /** + * Given an array of UTF32 character codes, return their corresponding glyph IDs. + * + * @param chars pointer to the array of UTF32 chars + * @param number of chars and glyphs + * @param glyphs returns the corresponding glyph IDs for each character. + */ + void unicharsToGlyphs(const SkUnichar uni[], int count, SkGlyphID glyphs[]) const; + + int textToGlyphs(const void* text, size_t byteLength, SkTextEncoding encoding, + SkGlyphID glyphs[], int maxGlyphCount) const; + + /** + * Return the glyphID that corresponds to the specified unicode code-point + * (in UTF32 encoding). If the unichar is not supported, returns 0. + * + * This is a short-cut for calling unicharsToGlyphs(). + */ + SkGlyphID unicharToGlyph(SkUnichar unichar) const; + + /** + * Return the number of glyphs in the typeface. + */ + int countGlyphs() const; + + // Table getters -- may fail if the underlying font format is not organized + // as 4-byte tables. + + /** Return the number of tables in the font. */ + int countTables() const; + + /** Copy into tags[] (allocated by the caller) the list of table tags in + * the font, and return the number. This will be the same as CountTables() + * or 0 if an error occured. If tags == NULL, this only returns the count + * (the same as calling countTables()). + */ + int getTableTags(SkFontTableTag tags[]) const; + + /** Given a table tag, return the size of its contents, or 0 if not present + */ + size_t getTableSize(SkFontTableTag) const; + + /** Copy the contents of a table into data (allocated by the caller). Note + * that the contents of the table will be in their native endian order + * (which for most truetype tables is big endian). If the table tag is + * not found, or there is an error copying the data, then 0 is returned. + * If this happens, it is possible that some or all of the memory pointed + * to by data may have been written to, even though an error has occured. + * + * @param tag The table tag whose contents are to be copied + * @param offset The offset in bytes into the table's contents where the + * copy should start from. + * @param length The number of bytes, starting at offset, of table data + * to copy. + * @param data storage address where the table contents are copied to + * @return the number of bytes actually copied into data. If offset+length + * exceeds the table's size, then only the bytes up to the table's + * size are actually copied, and this is the value returned. If + * offset > the table's size, or tag is not a valid table, + * then 0 is returned. + */ + size_t getTableData(SkFontTableTag tag, size_t offset, size_t length, + void* data) const; + + /** + * Return an immutable copy of the requested font table, or nullptr if that table was + * not found. This can sometimes be faster than calling getTableData() twice: once to find + * the length, and then again to copy the data. + * + * @param tag The table tag whose contents are to be copied + * @return an immutable copy of the table's data, or nullptr. + */ + sk_sp copyTableData(SkFontTableTag tag) const; + + /** + * Return the units-per-em value for this typeface, or zero if there is an + * error. + */ + int getUnitsPerEm() const; + + /** + * Given a run of glyphs, return the associated horizontal adjustments. + * Adjustments are in "design units", which are integers relative to the + * typeface's units per em (see getUnitsPerEm). + * + * Some typefaces are known to never support kerning. Calling this method + * with all zeros (e.g. getKerningPairAdustments(NULL, 0, NULL)) returns + * a boolean indicating if the typeface might support kerning. If it + * returns false, then it will always return false (no kerning) for all + * possible glyph runs. If it returns true, then it *may* return true for + * somne glyph runs. + * + * If count is non-zero, then the glyphs parameter must point to at least + * [count] valid glyph IDs, and the adjustments parameter must be + * sized to at least [count - 1] entries. If the method returns true, then + * [count-1] entries in the adjustments array will be set. If the method + * returns false, then no kerning should be applied, and the adjustments + * array will be in an undefined state (possibly some values may have been + * written, but none of them should be interpreted as valid values). + */ + bool getKerningPairAdjustments(const SkGlyphID glyphs[], int count, + int32_t adjustments[]) const; + + struct LocalizedString { + SkString fString; + SkString fLanguage; + }; + class LocalizedStrings { + public: + LocalizedStrings() = default; + virtual ~LocalizedStrings() { } + virtual bool next(LocalizedString* localizedString) = 0; + void unref() { delete this; } + + private: + LocalizedStrings(const LocalizedStrings&) = delete; + LocalizedStrings& operator=(const LocalizedStrings&) = delete; + }; + /** + * Returns an iterator which will attempt to enumerate all of the + * family names specified by the font. + * It is the caller's responsibility to unref() the returned pointer. + */ + LocalizedStrings* createFamilyNameIterator() const; + + /** + * Return the family name for this typeface. It will always be returned + * encoded as UTF8, but the language of the name is whatever the host + * platform chooses. + */ + void getFamilyName(SkString* name) const; + + /** + * Return the PostScript name for this typeface. + * Value may change based on variation parameters. + * Returns false if no PostScript name is available. + */ + bool getPostScriptName(SkString* name) const; + + /** + * Return a stream for the contents of the font data, or NULL on failure. + * If ttcIndex is not null, it is set to the TrueTypeCollection index + * of this typeface within the stream, or 0 if the stream is not a + * collection. + * The caller is responsible for deleting the stream. + */ + std::unique_ptr openStream(int* ttcIndex) const; + + /** + * Return a stream for the contents of the font data. + * Returns nullptr on failure or if the font data isn't already available in stream form. + * Use when the stream can be used opportunistically but the calling code would prefer + * to fall back to table access if creating the stream would be expensive. + * Otherwise acts the same as openStream. + */ + std::unique_ptr openExistingStream(int* ttcIndex) const; + + /** + * Return a scalercontext for the given descriptor. It may return a + * stub scalercontext that will not crash, but will draw nothing. + */ + std::unique_ptr createScalerContext(const SkScalerContextEffects&, + const SkDescriptor*) const; + + /** + * Return a rectangle (scaled to 1-pt) that represents the union of the bounds of all + * of the glyphs, but each one positioned at (0,). This may be conservatively large, and + * will not take into account any hinting or other size-specific adjustments. + */ + SkRect getBounds() const; + + /*** + * Returns whether this typeface has color glyphs and therefore cannot be + * rendered as a path. e.g. Emojis. + */ + virtual bool hasColorGlyphs() const { return false; } + + // PRIVATE / EXPERIMENTAL -- do not call + void filterRec(SkScalerContextRec* rec) const { + this->onFilterRec(rec); + } + // PRIVATE / EXPERIMENTAL -- do not call + void getFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const { + this->onGetFontDescriptor(desc, isLocal); + } + // PRIVATE / EXPERIMENTAL -- do not call + void* internal_private_getCTFontRef() const { + return this->onGetCTFontRef(); + } + + /* Skia reserves all tags that begin with a lower case letter and 0 */ + using FactoryId = SkFourByteTag; + static void Register( + FactoryId id, + sk_sp (*make)(std::unique_ptr, const SkFontArguments&)); + +protected: + explicit SkTypeface(const SkFontStyle& style, bool isFixedPitch = false); + ~SkTypeface() override; + + virtual sk_sp onMakeClone(const SkFontArguments&) const = 0; + + /** Sets the fixedPitch bit. If used, must be called in the constructor. */ + void setIsFixedPitch(bool isFixedPitch) { fIsFixedPitch = isFixedPitch; } + /** Sets the font style. If used, must be called in the constructor. */ + void setFontStyle(SkFontStyle style) { fStyle = style; } + + // Must return a valid scaler context. It can not return nullptr. + virtual std::unique_ptr onCreateScalerContext(const SkScalerContextEffects&, + const SkDescriptor*) const = 0; + virtual void onFilterRec(SkScalerContextRec*) const = 0; + friend class SkScalerContext; // onFilterRec + + // Subclasses *must* override this method to work with the PDF backend. + virtual std::unique_ptr onGetAdvancedMetrics() const = 0; + // For type1 postscript fonts only, set the glyph names for each glyph. + // destination array is non-null, and points to an array of size this->countGlyphs(). + // Backends that do not suport type1 fonts should not override. + virtual void getPostScriptGlyphNames(SkString*) const = 0; + + // The mapping from glyph to Unicode; array indices are glyph ids. + // For each glyph, give the default Unicode value, if it exists. + // dstArray is non-null, and points to an array of size this->countGlyphs(). + virtual void getGlyphToUnicodeMap(SkUnichar* dstArray) const = 0; + + virtual std::unique_ptr onOpenStream(int* ttcIndex) const = 0; + + virtual std::unique_ptr onOpenExistingStream(int* ttcIndex) const; + + virtual bool onGlyphMaskNeedsCurrentColor() const = 0; + + virtual int onGetVariationDesignPosition( + SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const = 0; + + virtual int onGetVariationDesignParameters( + SkFontParameters::Variation::Axis parameters[], int parameterCount) const = 0; + + virtual void onGetFontDescriptor(SkFontDescriptor*, bool* isLocal) const = 0; + + virtual void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const = 0; + virtual int onCountGlyphs() const = 0; + + virtual int onGetUPEM() const = 0; + virtual bool onGetKerningPairAdjustments(const SkGlyphID glyphs[], int count, + int32_t adjustments[]) const; + + /** Returns the family name of the typeface as known by its font manager. + * This name may or may not be produced by the family name iterator. + */ + virtual void onGetFamilyName(SkString* familyName) const = 0; + virtual bool onGetPostScriptName(SkString*) const = 0; + + /** Returns an iterator over the family names in the font. */ + virtual LocalizedStrings* onCreateFamilyNameIterator() const = 0; + + virtual int onGetTableTags(SkFontTableTag tags[]) const = 0; + virtual size_t onGetTableData(SkFontTableTag, size_t offset, + size_t length, void* data) const = 0; + virtual sk_sp onCopyTableData(SkFontTableTag) const; + + virtual bool onComputeBounds(SkRect*) const; + + virtual void* onGetCTFontRef() const { return nullptr; } + +private: + /** Returns true if the typeface's glyph masks may refer to the foreground + * paint foreground color. This is needed to determine caching requirements. Usually true for + * typefaces that contain a COLR table. + */ + bool glyphMaskNeedsCurrentColor() const; + friend class SkStrikeServerImpl; // glyphMaskNeedsCurrentColor + friend class SkTypefaceProxyPrototype; // glyphMaskNeedsCurrentColor + + /** Retrieve detailed typeface metrics. Used by the PDF backend. */ + std::unique_ptr getAdvancedMetrics() const; + friend class SkRandomTypeface; // getAdvancedMetrics + friend class SkPDFFont; // getAdvancedMetrics + + /** Style specifies the intrinsic style attributes of a given typeface */ + enum Style { + kNormal = 0, + kBold = 0x01, + kItalic = 0x02, + + // helpers + kBoldItalic = 0x03 + }; + static SkFontStyle FromOldStyle(Style oldStyle); + static SkTypeface* GetDefaultTypeface(Style style = SkTypeface::kNormal); + + friend class SkFontPriv; // GetDefaultTypeface + friend class SkPaintPriv; // GetDefaultTypeface + friend class SkFont; // getGlyphToUnicodeMap + +private: + SkTypefaceID fUniqueID; + SkFontStyle fStyle; + mutable SkRect fBounds; + mutable SkOnce fBoundsOnce; + bool fIsFixedPitch; + + using INHERITED = SkWeakRefCnt; +}; +#endif diff --git a/gfx/skia/skia/include/core/SkTypes.h b/gfx/skia/skia/include/core/SkTypes.h new file mode 100644 index 0000000000..5530cc4463 --- /dev/null +++ b/gfx/skia/skia/include/core/SkTypes.h @@ -0,0 +1,197 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTypes_DEFINED +#define SkTypes_DEFINED + +// All of these files should be independent of things users can set via the user config file. +// They should also be able to be included in any order. +// IWYU pragma: begin_exports +#include "include/private/base/SkFeatures.h" + +// Load and verify defines from the user config file. +#include "include/private/base/SkLoadUserConfig.h" + +// Any includes or defines below can be configured by the user config file. +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkAttributes.h" +#include "include/private/base/SkDebug.h" +// IWYU pragma: end_exports + +#include +#include + +#if defined(SK_GANESH) || defined(SK_GRAPHITE) +# if !defined(SK_ENABLE_SKSL) +# define SK_ENABLE_SKSL +# endif +#else +# undef SK_GL +# undef SK_VULKAN +# undef SK_METAL +# undef SK_DAWN +# undef SK_DIRECT3D +#endif + +// If SK_R32_SHIFT is set, we'll use that to choose RGBA or BGRA. +// If not, we'll default to RGBA everywhere except BGRA on Windows. +#if defined(SK_R32_SHIFT) + static_assert(SK_R32_SHIFT == 0 || SK_R32_SHIFT == 16, ""); +#elif defined(SK_BUILD_FOR_WIN) + #define SK_R32_SHIFT 16 +#else + #define SK_R32_SHIFT 0 +#endif + +#if defined(SK_B32_SHIFT) + static_assert(SK_B32_SHIFT == (16-SK_R32_SHIFT), ""); +#else + #define SK_B32_SHIFT (16-SK_R32_SHIFT) +#endif + +#define SK_G32_SHIFT 8 +#define SK_A32_SHIFT 24 + +/** + * SK_PMCOLOR_BYTE_ORDER can be used to query the byte order of SkPMColor at compile time. + */ +#ifdef SK_CPU_BENDIAN +# define SK_PMCOLOR_BYTE_ORDER(C0, C1, C2, C3) \ + (SK_ ## C3 ## 32_SHIFT == 0 && \ + SK_ ## C2 ## 32_SHIFT == 8 && \ + SK_ ## C1 ## 32_SHIFT == 16 && \ + SK_ ## C0 ## 32_SHIFT == 24) +#else +# define SK_PMCOLOR_BYTE_ORDER(C0, C1, C2, C3) \ + (SK_ ## C0 ## 32_SHIFT == 0 && \ + SK_ ## C1 ## 32_SHIFT == 8 && \ + SK_ ## C2 ## 32_SHIFT == 16 && \ + SK_ ## C3 ## 32_SHIFT == 24) +#endif + +#if defined SK_DEBUG && defined SK_BUILD_FOR_WIN + #ifdef free + #undef free + #endif + #include + #undef free +#endif + +#ifndef SK_ALLOW_STATIC_GLOBAL_INITIALIZERS + #define SK_ALLOW_STATIC_GLOBAL_INITIALIZERS 0 +#endif + +#if !defined(SK_GAMMA_EXPONENT) + #define SK_GAMMA_EXPONENT (0.0f) // SRGB +#endif + +#ifndef GR_TEST_UTILS +# define GR_TEST_UTILS 0 +#endif + + +#if defined(SK_HISTOGRAM_ENUMERATION) || \ + defined(SK_HISTOGRAM_BOOLEAN) || \ + defined(SK_HISTOGRAM_EXACT_LINEAR) || \ + defined(SK_HISTOGRAM_MEMORY_KB) +# define SK_HISTOGRAMS_ENABLED 1 +#else +# define SK_HISTOGRAMS_ENABLED 0 +#endif + +#ifndef SK_HISTOGRAM_BOOLEAN +# define SK_HISTOGRAM_BOOLEAN(name, sample) +#endif + +#ifndef SK_HISTOGRAM_ENUMERATION +# define SK_HISTOGRAM_ENUMERATION(name, sample, enum_size) +#endif + +#ifndef SK_HISTOGRAM_EXACT_LINEAR +# define SK_HISTOGRAM_EXACT_LINEAR(name, sample, value_max) +#endif + +#ifndef SK_HISTOGRAM_MEMORY_KB +# define SK_HISTOGRAM_MEMORY_KB(name, sample) +#endif + +#define SK_HISTOGRAM_PERCENTAGE(name, percent_as_int) \ + SK_HISTOGRAM_EXACT_LINEAR(name, percent_as_int, 101) + +// The top-level define SK_ENABLE_OPTIMIZE_SIZE can be used to remove several large features at once +#if defined(SK_ENABLE_OPTIMIZE_SIZE) +# define SK_FORCE_RASTER_PIPELINE_BLITTER +# define SK_DISABLE_SDF_TEXT +#endif + +#ifndef SK_DISABLE_LEGACY_SHADERCONTEXT +# define SK_ENABLE_LEGACY_SHADERCONTEXT +#endif + +#if defined(SK_BUILD_FOR_LIBFUZZER) || defined(SK_BUILD_FOR_AFL_FUZZ) +#if !defined(SK_BUILD_FOR_FUZZER) + #define SK_BUILD_FOR_FUZZER +#endif +#endif + +/** + * Gr defines are set to 0 or 1, rather than being undefined or defined + */ + +#if !defined(GR_CACHE_STATS) + #if defined(SK_DEBUG) || defined(SK_DUMP_STATS) + #define GR_CACHE_STATS 1 + #else + #define GR_CACHE_STATS 0 + #endif +#endif + +#if !defined(GR_GPU_STATS) + #if defined(SK_DEBUG) || defined(SK_DUMP_STATS) || GR_TEST_UTILS + #define GR_GPU_STATS 1 + #else + #define GR_GPU_STATS 0 + #endif +#endif + +//////////////////////////////////////////////////////////////////////////////// + +typedef uint32_t SkFourByteTag; +static inline constexpr SkFourByteTag SkSetFourByteTag(char a, char b, char c, char d) { + return (((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | (uint32_t)d); +} + +//////////////////////////////////////////////////////////////////////////////// + +/** 32 bit integer to hold a unicode value +*/ +typedef int32_t SkUnichar; + +/** 16 bit unsigned integer to hold a glyph index +*/ +typedef uint16_t SkGlyphID; + +/** 32 bit value to hold a millisecond duration + Note that SK_MSecMax is about 25 days. +*/ +typedef uint32_t SkMSec; + +/** Maximum representable milliseconds; 24d 20h 31m 23.647s. +*/ +static constexpr SkMSec SK_MSecMax = INT32_MAX; + +/** The generation IDs in Skia reserve 0 has an invalid marker. +*/ +static constexpr uint32_t SK_InvalidGenID = 0; + +/** The unique IDs in Skia reserve 0 has an invalid marker. +*/ +static constexpr uint32_t SK_InvalidUniqueID = 0; + + +#endif diff --git a/gfx/skia/skia/include/core/SkUnPreMultiply.h b/gfx/skia/skia/include/core/SkUnPreMultiply.h new file mode 100644 index 0000000000..b492619d07 --- /dev/null +++ b/gfx/skia/skia/include/core/SkUnPreMultiply.h @@ -0,0 +1,56 @@ + +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + + + + +#ifndef SkUnPreMultiply_DEFINED +#define SkUnPreMultiply_DEFINED + +#include "include/core/SkColor.h" + +class SK_API SkUnPreMultiply { +public: + typedef uint32_t Scale; + + // index this table with alpha [0..255] + static const Scale* GetScaleTable() { + return gTable; + } + + static Scale GetScale(U8CPU alpha) { + SkASSERT(alpha <= 255); + return gTable[alpha]; + } + + /** Usage: + + const Scale* table = SkUnPreMultiply::GetScaleTable(); + + for (...) { + unsigned a = ... + SkUnPreMultiply::Scale scale = table[a]; + + red = SkUnPreMultiply::ApplyScale(scale, red); + ... + // now red is unpremultiplied + } + */ + static U8CPU ApplyScale(Scale scale, U8CPU component) { + SkASSERT(component <= 255); + return (scale * component + (1 << 23)) >> 24; + } + + static SkColor PMColorToColor(SkPMColor c); + +private: + static const uint32_t gTable[256]; +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkVertices.h b/gfx/skia/skia/include/core/SkVertices.h new file mode 100644 index 0000000000..2c3f784a42 --- /dev/null +++ b/gfx/skia/skia/include/core/SkVertices.h @@ -0,0 +1,134 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkVertices_DEFINED +#define SkVertices_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" + +#include + +class SkData; +struct SkPoint; +class SkVerticesPriv; + +/** + * An immutable set of vertex data that can be used with SkCanvas::drawVertices. + */ +class SK_API SkVertices : public SkNVRefCnt { + struct Desc; + struct Sizes; +public: + enum VertexMode { + kTriangles_VertexMode, + kTriangleStrip_VertexMode, + kTriangleFan_VertexMode, + + kLast_VertexMode = kTriangleFan_VertexMode, + }; + + /** + * Create a vertices by copying the specified arrays. texs, colors may be nullptr, + * and indices is ignored if indexCount == 0. + */ + static sk_sp MakeCopy(VertexMode mode, int vertexCount, + const SkPoint positions[], + const SkPoint texs[], + const SkColor colors[], + int indexCount, + const uint16_t indices[]); + + static sk_sp MakeCopy(VertexMode mode, int vertexCount, + const SkPoint positions[], + const SkPoint texs[], + const SkColor colors[]) { + return MakeCopy(mode, + vertexCount, + positions, + texs, + colors, + 0, + nullptr); + } + + enum BuilderFlags { + kHasTexCoords_BuilderFlag = 1 << 0, + kHasColors_BuilderFlag = 1 << 1, + }; + class Builder { + public: + Builder(VertexMode mode, int vertexCount, int indexCount, uint32_t flags); + + bool isValid() const { return fVertices != nullptr; } + + SkPoint* positions(); + uint16_t* indices(); // returns null if there are no indices + + // If we have custom attributes, these will always be null + SkPoint* texCoords(); // returns null if there are no texCoords + SkColor* colors(); // returns null if there are no colors + + // Detach the built vertices object. After the first call, this will always return null. + sk_sp detach(); + + private: + Builder(const Desc&); + + void init(const Desc&); + + // holds a partially complete object. only completed in detach() + sk_sp fVertices; + // Extra storage for intermediate vertices in the case where the client specifies indexed + // triangle fans. These get converted to indexed triangles when the Builder is finalized. + std::unique_ptr fIntermediateFanIndices; + + friend class SkVertices; + friend class SkVerticesPriv; + }; + + uint32_t uniqueID() const { return fUniqueID; } + const SkRect& bounds() const { return fBounds; } + + // returns approximate byte size of the vertices object + size_t approximateSize() const; + + // Provides access to functions that aren't part of the public API. + SkVerticesPriv priv(); + const SkVerticesPriv priv() const; // NOLINT(readability-const-return-type) + +private: + SkVertices() {} + + friend class SkVerticesPriv; + + // these are needed since we've manually sized our allocation (see Builder::init) + friend class SkNVRefCnt; + void operator delete(void* p); + + Sizes getSizes() const; + + // we store this first, to pair with the refcnt in our base-class, so we don't have an + // unnecessary pad between it and the (possibly 8-byte aligned) ptrs. + uint32_t fUniqueID; + + // these point inside our allocation, so none of these can be "freed" + SkPoint* fPositions; // [vertexCount] + uint16_t* fIndices; // [indexCount] or null + SkPoint* fTexs; // [vertexCount] or null + SkColor* fColors; // [vertexCount] or null + + SkRect fBounds; // computed to be the union of the fPositions[] + int fVertexCount; + int fIndexCount; + + VertexMode fMode; + // below here is where the actual array data is stored. +}; + +#endif diff --git a/gfx/skia/skia/include/core/SkYUVAInfo.h b/gfx/skia/skia/include/core/SkYUVAInfo.h new file mode 100644 index 0000000000..a3cf210f37 --- /dev/null +++ b/gfx/skia/skia/include/core/SkYUVAInfo.h @@ -0,0 +1,304 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkYUVAInfo_DEFINED +#define SkYUVAInfo_DEFINED + +#include "include/codec/SkEncodedOrigin.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkSize.h" + +#include +#include + +/** + * Specifies the structure of planes for a YUV image with optional alpha. The actual planar data + * is not part of this structure and depending on usage is in external textures or pixmaps. + */ +class SK_API SkYUVAInfo { +public: + enum YUVAChannels { kY, kU, kV, kA, kLast = kA }; + static constexpr int kYUVAChannelCount = static_cast(YUVAChannels::kLast + 1); + + struct YUVALocation; // For internal use. + using YUVALocations = std::array; + + /** + * Specifies how YUV (and optionally A) are divided among planes. Planes are separated by + * underscores in the enum value names. Within each plane the pixmap/texture channels are + * mapped to the YUVA channels in the order specified, e.g. for kY_UV Y is in channel 0 of plane + * 0, U is in channel 0 of plane 1, and V is in channel 1 of plane 1. Channel ordering + * within a pixmap/texture given the channels it contains: + * A: 0:A + * Luminance/Gray: 0:Gray + * Luminance/Gray + Alpha: 0:Gray, 1:A + * RG 0:R, 1:G + * RGB 0:R, 1:G, 2:B + * RGBA 0:R, 1:G, 2:B, 3:A + */ + enum class PlaneConfig { + kUnknown, + + kY_U_V, ///< Plane 0: Y, Plane 1: U, Plane 2: V + kY_V_U, ///< Plane 0: Y, Plane 1: V, Plane 2: U + kY_UV, ///< Plane 0: Y, Plane 1: UV + kY_VU, ///< Plane 0: Y, Plane 1: VU + kYUV, ///< Plane 0: YUV + kUYV, ///< Plane 0: UYV + + kY_U_V_A, ///< Plane 0: Y, Plane 1: U, Plane 2: V, Plane 3: A + kY_V_U_A, ///< Plane 0: Y, Plane 1: V, Plane 2: U, Plane 3: A + kY_UV_A, ///< Plane 0: Y, Plane 1: UV, Plane 2: A + kY_VU_A, ///< Plane 0: Y, Plane 1: VU, Plane 2: A + kYUVA, ///< Plane 0: YUVA + kUYVA, ///< Plane 0: UYVA + + kLast = kUYVA + }; + + /** + * UV subsampling is also specified in the enum value names using J:a:b notation (e.g. 4:2:0 is + * 1/2 horizontal and 1/2 vertical resolution for U and V). If alpha is present it is not sub- + * sampled. Note that Subsampling values other than k444 are only valid with PlaneConfig values + * that have U and V in different planes than Y (and A, if present). + */ + enum class Subsampling { + kUnknown, + + k444, ///< No subsampling. UV values for each Y. + k422, ///< 1 set of UV values for each 2x1 block of Y values. + k420, ///< 1 set of UV values for each 2x2 block of Y values. + k440, ///< 1 set of UV values for each 1x2 block of Y values. + k411, ///< 1 set of UV values for each 4x1 block of Y values. + k410, ///< 1 set of UV values for each 4x2 block of Y values. + + kLast = k410 + }; + + /** + * Describes how subsampled chroma values are sited relative to luma values. + * + * Currently only centered siting is supported but will expand to support additional sitings. + */ + enum class Siting { + /** + * Subsampled chroma value is sited at the center of the block of corresponding luma values. + */ + kCentered, + }; + + static constexpr int kMaxPlanes = 4; + + /** ratio of Y/A values to U/V values in x and y. */ + static std::tuple SubsamplingFactors(Subsampling); + + /** + * SubsamplingFactors(Subsampling) if planedIdx refers to a U/V plane and otherwise {1, 1} if + * inputs are valid. Invalid inputs consist of incompatible PlaneConfig/Subsampling/planeIdx + * combinations. {0, 0} is returned for invalid inputs. + */ + static std::tuple PlaneSubsamplingFactors(PlaneConfig, Subsampling, int planeIdx); + + /** + * Given image dimensions, a planer configuration, subsampling, and origin, determine the + * expected size of each plane. Returns the number of expected planes. planeDimensions[0] + * through planeDimensions[] are written. The input image dimensions are as displayed + * (after the planes have been transformed to the intended display orientation). The plane + * dimensions are output as the planes are stored in memory (may be rotated from image + * dimensions). + */ + static int PlaneDimensions(SkISize imageDimensions, + PlaneConfig, + Subsampling, + SkEncodedOrigin, + SkISize planeDimensions[kMaxPlanes]); + + /** Number of planes for a given PlaneConfig. */ + static constexpr int NumPlanes(PlaneConfig); + + /** + * Number of Y, U, V, A channels in the ith plane for a given PlaneConfig (or 0 if i is + * invalid). + */ + static constexpr int NumChannelsInPlane(PlaneConfig, int i); + + /** + * Given a PlaneConfig and a set of channel flags for each plane, convert to YUVALocations + * representation. Fails if channel flags aren't valid for the PlaneConfig (i.e. don't have + * enough channels in a plane) by returning an invalid set of locations (plane indices are -1). + */ + static YUVALocations GetYUVALocations(PlaneConfig, const uint32_t* planeChannelFlags); + + /** Does the PlaneConfig have alpha values? */ + static bool HasAlpha(PlaneConfig); + + SkYUVAInfo() = default; + SkYUVAInfo(const SkYUVAInfo&) = default; + + /** + * 'dimensions' should specify the size of the full resolution image (after planes have been + * oriented to how the image is displayed as indicated by 'origin'). + */ + SkYUVAInfo(SkISize dimensions, + PlaneConfig, + Subsampling, + SkYUVColorSpace, + SkEncodedOrigin origin = kTopLeft_SkEncodedOrigin, + Siting sitingX = Siting::kCentered, + Siting sitingY = Siting::kCentered); + + SkYUVAInfo& operator=(const SkYUVAInfo& that) = default; + + PlaneConfig planeConfig() const { return fPlaneConfig; } + Subsampling subsampling() const { return fSubsampling; } + + std::tuple planeSubsamplingFactors(int planeIdx) const { + return PlaneSubsamplingFactors(fPlaneConfig, fSubsampling, planeIdx); + } + + /** + * Dimensions of the full resolution image (after planes have been oriented to how the image + * is displayed as indicated by fOrigin). + */ + SkISize dimensions() const { return fDimensions; } + int width() const { return fDimensions.width(); } + int height() const { return fDimensions.height(); } + + SkYUVColorSpace yuvColorSpace() const { return fYUVColorSpace; } + Siting sitingX() const { return fSitingX; } + Siting sitingY() const { return fSitingY; } + + SkEncodedOrigin origin() const { return fOrigin; } + + SkMatrix originMatrix() const { + return SkEncodedOriginToMatrix(fOrigin, this->width(), this->height()); + } + + bool hasAlpha() const { return HasAlpha(fPlaneConfig); } + + /** + * Returns the number of planes and initializes planeDimensions[0]..planeDimensions[] to + * the expected dimensions for each plane. Dimensions are as stored in memory, before + * transformation to image display space as indicated by origin(). + */ + int planeDimensions(SkISize planeDimensions[kMaxPlanes]) const { + return PlaneDimensions(fDimensions, fPlaneConfig, fSubsampling, fOrigin, planeDimensions); + } + + /** + * Given a per-plane row bytes, determine size to allocate for all planes. Optionally retrieves + * the per-plane byte sizes in planeSizes if not null. If total size overflows will return + * SIZE_MAX and set all planeSizes to SIZE_MAX. + */ + size_t computeTotalBytes(const size_t rowBytes[kMaxPlanes], + size_t planeSizes[kMaxPlanes] = nullptr) const; + + int numPlanes() const { return NumPlanes(fPlaneConfig); } + + int numChannelsInPlane(int i) const { return NumChannelsInPlane(fPlaneConfig, i); } + + /** + * Given a set of channel flags for each plane, converts this->planeConfig() to YUVALocations + * representation. Fails if the channel flags aren't valid for the PlaneConfig (i.e. don't have + * enough channels in a plane) by returning default initialized locations (all plane indices are + * -1). + */ + YUVALocations toYUVALocations(const uint32_t* channelFlags) const; + + /** + * Makes a SkYUVAInfo that is identical to this one but with the passed Subsampling. If the + * passed Subsampling is not k444 and this info's PlaneConfig is not compatible with chroma + * subsampling (because Y is in the same plane as UV) then the result will be an invalid + * SkYUVAInfo. + */ + SkYUVAInfo makeSubsampling(SkYUVAInfo::Subsampling) const; + + /** + * Makes a SkYUVAInfo that is identical to this one but with the passed dimensions. If the + * passed dimensions is empty then the result will be an invalid SkYUVAInfo. + */ + SkYUVAInfo makeDimensions(SkISize) const; + + bool operator==(const SkYUVAInfo& that) const; + bool operator!=(const SkYUVAInfo& that) const { return !(*this == that); } + + bool isValid() const { return fPlaneConfig != PlaneConfig::kUnknown; } + +private: + SkISize fDimensions = {0, 0}; + + PlaneConfig fPlaneConfig = PlaneConfig::kUnknown; + Subsampling fSubsampling = Subsampling::kUnknown; + + SkYUVColorSpace fYUVColorSpace = SkYUVColorSpace::kIdentity_SkYUVColorSpace; + + /** + * YUVA data often comes from formats like JPEG that support EXIF orientation. + * Code that operates on the raw YUV data often needs to know that orientation. + */ + SkEncodedOrigin fOrigin = kTopLeft_SkEncodedOrigin; + + Siting fSitingX = Siting::kCentered; + Siting fSitingY = Siting::kCentered; +}; + +constexpr int SkYUVAInfo::NumPlanes(PlaneConfig planeConfig) { + switch (planeConfig) { + case PlaneConfig::kUnknown: return 0; + case PlaneConfig::kY_U_V: return 3; + case PlaneConfig::kY_V_U: return 3; + case PlaneConfig::kY_UV: return 2; + case PlaneConfig::kY_VU: return 2; + case PlaneConfig::kYUV: return 1; + case PlaneConfig::kUYV: return 1; + case PlaneConfig::kY_U_V_A: return 4; + case PlaneConfig::kY_V_U_A: return 4; + case PlaneConfig::kY_UV_A: return 3; + case PlaneConfig::kY_VU_A: return 3; + case PlaneConfig::kYUVA: return 1; + case PlaneConfig::kUYVA: return 1; + } + SkUNREACHABLE; +} + +constexpr int SkYUVAInfo::NumChannelsInPlane(PlaneConfig config, int i) { + switch (config) { + case PlaneConfig::kUnknown: + return 0; + + case SkYUVAInfo::PlaneConfig::kY_U_V: + case SkYUVAInfo::PlaneConfig::kY_V_U: + return i >= 0 && i < 3 ? 1 : 0; + case SkYUVAInfo::PlaneConfig::kY_UV: + case SkYUVAInfo::PlaneConfig::kY_VU: + switch (i) { + case 0: return 1; + case 1: return 2; + default: return 0; + } + case SkYUVAInfo::PlaneConfig::kYUV: + case SkYUVAInfo::PlaneConfig::kUYV: + return i == 0 ? 3 : 0; + case SkYUVAInfo::PlaneConfig::kY_U_V_A: + case SkYUVAInfo::PlaneConfig::kY_V_U_A: + return i >= 0 && i < 4 ? 1 : 0; + case SkYUVAInfo::PlaneConfig::kY_UV_A: + case SkYUVAInfo::PlaneConfig::kY_VU_A: + switch (i) { + case 0: return 1; + case 1: return 2; + case 2: return 1; + default: return 0; + } + case SkYUVAInfo::PlaneConfig::kYUVA: + case SkYUVAInfo::PlaneConfig::kUYVA: + return i == 0 ? 4 : 0; + } + return 0; +} + +#endif diff --git a/gfx/skia/skia/include/core/SkYUVAPixmaps.h b/gfx/skia/skia/include/core/SkYUVAPixmaps.h new file mode 100644 index 0000000000..f75b314c00 --- /dev/null +++ b/gfx/skia/skia/include/core/SkYUVAPixmaps.h @@ -0,0 +1,336 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkYUVAPixmaps_DEFINED +#define SkYUVAPixmaps_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkYUVAInfo.h" +#include "include/private/base/SkTo.h" + +#include +#include + +class GrImageContext; + +/** + * SkYUVAInfo combined with per-plane SkColorTypes and row bytes. Fully specifies the SkPixmaps + * for a YUVA image without the actual pixel memory and data. + */ +class SK_API SkYUVAPixmapInfo { +public: + static constexpr auto kMaxPlanes = SkYUVAInfo::kMaxPlanes; + + using PlaneConfig = SkYUVAInfo::PlaneConfig; + using Subsampling = SkYUVAInfo::Subsampling; + + /** + * Data type for Y, U, V, and possibly A channels independent of how values are packed into + * planes. + **/ + enum class DataType { + kUnorm8, ///< 8 bit unsigned normalized + kUnorm16, ///< 16 bit unsigned normalized + kFloat16, ///< 16 bit (half) floating point + kUnorm10_Unorm2, ///< 10 bit unorm for Y, U, and V. 2 bit unorm for alpha (if present). + + kLast = kUnorm10_Unorm2 + }; + static constexpr int kDataTypeCnt = static_cast(DataType::kLast) + 1; + + class SK_API SupportedDataTypes { + public: + /** Defaults to nothing supported. */ + constexpr SupportedDataTypes() = default; + + /** Init based on texture formats supported by the context. */ + SupportedDataTypes(const GrImageContext&); + + /** All legal combinations of PlaneConfig and DataType are supported. */ + static constexpr SupportedDataTypes All(); + + /** + * Checks whether there is a supported combination of color types for planes structured + * as indicated by PlaneConfig with channel data types as indicated by DataType. + */ + constexpr bool supported(PlaneConfig, DataType) const; + + /** + * Update to add support for pixmaps with numChannel channels where each channel is + * represented as DataType. + */ + void enableDataType(DataType, int numChannels); + + private: + // The bit for DataType dt with n channels is at index kDataTypeCnt*(n-1) + dt. + std::bitset fDataTypeSupport = {}; + }; + + /** + * Gets the default SkColorType to use with numChannels channels, each represented as DataType. + * Returns kUnknown_SkColorType if no such color type. + */ + static constexpr SkColorType DefaultColorTypeForDataType(DataType dataType, int numChannels); + + /** + * If the SkColorType is supported for YUVA pixmaps this will return the number of YUVA channels + * that can be stored in a plane of this color type and what the DataType is of those channels. + * If the SkColorType is not supported as a YUVA plane the number of channels is reported as 0 + * and the DataType returned should be ignored. + */ + static std::tuple NumChannelsAndDataType(SkColorType); + + /** Default SkYUVAPixmapInfo is invalid. */ + SkYUVAPixmapInfo() = default; + + /** + * Initializes the SkYUVAPixmapInfo from a SkYUVAInfo with per-plane color types and row bytes. + * This will be invalid if the colorTypes aren't compatible with the SkYUVAInfo or if a + * rowBytes entry is not valid for the plane dimensions and color type. Color type and + * row byte values beyond the number of planes in SkYUVAInfo are ignored. All SkColorTypes + * must have the same DataType or this will be invalid. + * + * If rowBytes is nullptr then bpp*width is assumed for each plane. + */ + SkYUVAPixmapInfo(const SkYUVAInfo&, + const SkColorType[kMaxPlanes], + const size_t rowBytes[kMaxPlanes]); + /** + * Like above but uses DefaultColorTypeForDataType to determine each plane's SkColorType. If + * rowBytes is nullptr then bpp*width is assumed for each plane. + */ + SkYUVAPixmapInfo(const SkYUVAInfo&, DataType, const size_t rowBytes[kMaxPlanes]); + + SkYUVAPixmapInfo(const SkYUVAPixmapInfo&) = default; + + SkYUVAPixmapInfo& operator=(const SkYUVAPixmapInfo&) = default; + + bool operator==(const SkYUVAPixmapInfo&) const; + bool operator!=(const SkYUVAPixmapInfo& that) const { return !(*this == that); } + + const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; } + + SkYUVColorSpace yuvColorSpace() const { return fYUVAInfo.yuvColorSpace(); } + + /** The number of SkPixmap planes, 0 if this SkYUVAPixmapInfo is invalid. */ + int numPlanes() const { return fYUVAInfo.numPlanes(); } + + /** The per-YUV[A] channel data type. */ + DataType dataType() const { return fDataType; } + + /** + * Row bytes for the ith plane. Returns zero if i >= numPlanes() or this SkYUVAPixmapInfo is + * invalid. + */ + size_t rowBytes(int i) const { return fRowBytes[static_cast(i)]; } + + /** Image info for the ith plane, or default SkImageInfo if i >= numPlanes() */ + const SkImageInfo& planeInfo(int i) const { return fPlaneInfos[static_cast(i)]; } + + /** + * Determine size to allocate for all planes. Optionally retrieves the per-plane sizes in + * planeSizes if not null. If total size overflows will return SIZE_MAX and set all planeSizes + * to SIZE_MAX. Returns 0 and fills planesSizes with 0 if this SkYUVAPixmapInfo is not valid. + */ + size_t computeTotalBytes(size_t planeSizes[kMaxPlanes] = nullptr) const; + + /** + * Takes an allocation that is assumed to be at least computeTotalBytes() in size and configures + * the first numPlanes() entries in pixmaps array to point into that memory. The remaining + * entries of pixmaps are default initialized. Fails if this SkYUVAPixmapInfo not valid. + */ + bool initPixmapsFromSingleAllocation(void* memory, SkPixmap pixmaps[kMaxPlanes]) const; + + /** + * Returns true if this has been configured with a non-empty dimensioned SkYUVAInfo with + * compatible color types and row bytes. + */ + bool isValid() const { return fYUVAInfo.isValid(); } + + /** Is this valid and does it use color types allowed by the passed SupportedDataTypes? */ + bool isSupported(const SupportedDataTypes&) const; + +private: + SkYUVAInfo fYUVAInfo; + std::array fPlaneInfos = {}; + std::array fRowBytes = {}; + DataType fDataType = DataType::kUnorm8; + static_assert(kUnknown_SkColorType == 0, "default init isn't kUnknown"); +}; + +/** + * Helper to store SkPixmap planes as described by a SkYUVAPixmapInfo. Can be responsible for + * allocating/freeing memory for pixmaps or use external memory. + */ +class SK_API SkYUVAPixmaps { +public: + using DataType = SkYUVAPixmapInfo::DataType; + static constexpr auto kMaxPlanes = SkYUVAPixmapInfo::kMaxPlanes; + + static SkColorType RecommendedRGBAColorType(DataType); + + /** Allocate space for pixmaps' pixels in the SkYUVAPixmaps. */ + static SkYUVAPixmaps Allocate(const SkYUVAPixmapInfo& yuvaPixmapInfo); + + /** + * Use storage in SkData as backing store for pixmaps' pixels. SkData is retained by the + * SkYUVAPixmaps. + */ + static SkYUVAPixmaps FromData(const SkYUVAPixmapInfo&, sk_sp); + + /** + * Makes a deep copy of the src SkYUVAPixmaps. The returned SkYUVAPixmaps owns its planes' + * backing stores. + */ + static SkYUVAPixmaps MakeCopy(const SkYUVAPixmaps& src); + + /** + * Use passed in memory as backing store for pixmaps' pixels. Caller must ensure memory remains + * allocated while pixmaps are in use. There must be at least + * SkYUVAPixmapInfo::computeTotalBytes() allocated starting at memory. + */ + static SkYUVAPixmaps FromExternalMemory(const SkYUVAPixmapInfo&, void* memory); + + /** + * Wraps existing SkPixmaps. The SkYUVAPixmaps will have no ownership of the SkPixmaps' pixel + * memory so the caller must ensure it remains valid. Will return an invalid SkYUVAPixmaps if + * the SkYUVAInfo isn't compatible with the SkPixmap array (number of planes, plane dimensions, + * sufficient color channels in planes, ...). + */ + static SkYUVAPixmaps FromExternalPixmaps(const SkYUVAInfo&, const SkPixmap[kMaxPlanes]); + + /** Default SkYUVAPixmaps is invalid. */ + SkYUVAPixmaps() = default; + ~SkYUVAPixmaps() = default; + + SkYUVAPixmaps(SkYUVAPixmaps&& that) = default; + SkYUVAPixmaps& operator=(SkYUVAPixmaps&& that) = default; + SkYUVAPixmaps(const SkYUVAPixmaps&) = default; + SkYUVAPixmaps& operator=(const SkYUVAPixmaps& that) = default; + + /** Does have initialized pixmaps compatible with its SkYUVAInfo. */ + bool isValid() const { return !fYUVAInfo.dimensions().isEmpty(); } + + const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; } + + DataType dataType() const { return fDataType; } + + SkYUVAPixmapInfo pixmapsInfo() const; + + /** Number of pixmap planes or 0 if this SkYUVAPixmaps is invalid. */ + int numPlanes() const { return this->isValid() ? fYUVAInfo.numPlanes() : 0; } + + /** + * Access the SkPixmap planes. They are default initialized if this is not a valid + * SkYUVAPixmaps. + */ + const std::array& planes() const { return fPlanes; } + + /** + * Get the ith SkPixmap plane. SkPixmap will be default initialized if i >= numPlanes or this + * SkYUVAPixmaps is invalid. + */ + const SkPixmap& plane(int i) const { return fPlanes[SkToSizeT(i)]; } + + /** + * Computes a YUVALocations representation of the planar layout. The result is guaranteed to be + * valid if this->isValid(). + */ + SkYUVAInfo::YUVALocations toYUVALocations() const; + + /** Does this SkPixmaps own the backing store of the planes? */ + bool ownsStorage() const { return SkToBool(fData); } + +private: + SkYUVAPixmaps(const SkYUVAPixmapInfo&, sk_sp); + SkYUVAPixmaps(const SkYUVAInfo&, DataType, const SkPixmap[kMaxPlanes]); + + std::array fPlanes = {}; + sk_sp fData; + SkYUVAInfo fYUVAInfo; + DataType fDataType; +}; + +////////////////////////////////////////////////////////////////////////////// + +constexpr SkYUVAPixmapInfo::SupportedDataTypes SkYUVAPixmapInfo::SupportedDataTypes::All() { + using ULL = unsigned long long; // bitset cons. takes this. + ULL bits = 0; + for (ULL c = 1; c <= 4; ++c) { + for (ULL dt = 0; dt <= ULL(kDataTypeCnt); ++dt) { + if (DefaultColorTypeForDataType(static_cast(dt), + static_cast(c)) != kUnknown_SkColorType) { + bits |= ULL(1) << (dt + static_cast(kDataTypeCnt)*(c - 1)); + } + } + } + SupportedDataTypes combinations; + combinations.fDataTypeSupport = bits; + return combinations; +} + +constexpr bool SkYUVAPixmapInfo::SupportedDataTypes::supported(PlaneConfig config, + DataType type) const { + int n = SkYUVAInfo::NumPlanes(config); + for (int i = 0; i < n; ++i) { + auto c = static_cast(SkYUVAInfo::NumChannelsInPlane(config, i)); + SkASSERT(c >= 1 && c <= 4); + if (!fDataTypeSupport[static_cast(type) + + (c - 1)*static_cast(kDataTypeCnt)]) { + return false; + } + } + return true; +} + +constexpr SkColorType SkYUVAPixmapInfo::DefaultColorTypeForDataType(DataType dataType, + int numChannels) { + switch (numChannels) { + case 1: + switch (dataType) { + case DataType::kUnorm8: return kGray_8_SkColorType; + case DataType::kUnorm16: return kA16_unorm_SkColorType; + case DataType::kFloat16: return kA16_float_SkColorType; + case DataType::kUnorm10_Unorm2: return kUnknown_SkColorType; + } + break; + case 2: + switch (dataType) { + case DataType::kUnorm8: return kR8G8_unorm_SkColorType; + case DataType::kUnorm16: return kR16G16_unorm_SkColorType; + case DataType::kFloat16: return kR16G16_float_SkColorType; + case DataType::kUnorm10_Unorm2: return kUnknown_SkColorType; + } + break; + case 3: + // None of these are tightly packed. The intended use case is for interleaved YUVA + // planes where we're forcing opaqueness by ignoring the alpha values. + // There are "x" rather than "A" variants for Unorm8 and Unorm10_Unorm2 but we don't + // choose them because 1) there is no inherent advantage and 2) there is better support + // in the GPU backend for the "A" versions. + switch (dataType) { + case DataType::kUnorm8: return kRGBA_8888_SkColorType; + case DataType::kUnorm16: return kR16G16B16A16_unorm_SkColorType; + case DataType::kFloat16: return kRGBA_F16_SkColorType; + case DataType::kUnorm10_Unorm2: return kRGBA_1010102_SkColorType; + } + break; + case 4: + switch (dataType) { + case DataType::kUnorm8: return kRGBA_8888_SkColorType; + case DataType::kUnorm16: return kR16G16B16A16_unorm_SkColorType; + case DataType::kFloat16: return kRGBA_F16_SkColorType; + case DataType::kUnorm10_Unorm2: return kRGBA_1010102_SkColorType; + } + break; + } + return kUnknown_SkColorType; +} + +#endif diff --git a/gfx/skia/skia/include/docs/SkPDFDocument.h b/gfx/skia/skia/include/docs/SkPDFDocument.h new file mode 100644 index 0000000000..16e953be5e --- /dev/null +++ b/gfx/skia/skia/include/docs/SkPDFDocument.h @@ -0,0 +1,202 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkPDFDocument_DEFINED +#define SkPDFDocument_DEFINED + +#include "include/core/SkDocument.h" + +#include + +#include "include/core/SkColor.h" +#include "include/core/SkMilestone.h" +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/core/SkTime.h" +#include "include/private/base/SkNoncopyable.h" + +#define SKPDF_STRING(X) SKPDF_STRING_IMPL(X) +#define SKPDF_STRING_IMPL(X) #X + +class SkExecutor; +class SkPDFArray; +class SkPDFTagTree; + +namespace SkPDF { + +/** Attributes for nodes in the PDF tree. */ +class SK_API AttributeList : SkNoncopyable { +public: + AttributeList(); + ~AttributeList(); + + // Each attribute must have an owner (e.g. "Layout", "List", "Table", etc) + // and an attribute name (e.g. "BBox", "RowSpan", etc.) from PDF32000_2008 14.8.5, + // and then a value of the proper type according to the spec. + void appendInt(const char* owner, const char* name, int value); + void appendFloat(const char* owner, const char* name, float value); + void appendName(const char* owner, const char* attrName, const char* value); + void appendFloatArray(const char* owner, + const char* name, + const std::vector& value); + void appendNodeIdArray(const char* owner, + const char* attrName, + const std::vector& nodeIds); + +private: + friend class ::SkPDFTagTree; + + std::unique_ptr fAttrs; +}; + +/** A node in a PDF structure tree, giving a semantic representation + of the content. Each node ID is associated with content + by passing the SkCanvas and node ID to SkPDF::SetNodeId() when drawing. + NodeIDs should be unique within each tree. +*/ +struct StructureElementNode { + SkString fTypeString; + std::vector> fChildVector; + int fNodeId = 0; + std::vector fAdditionalNodeIds; + AttributeList fAttributes; + SkString fAlt; + SkString fLang; +}; + +/** Optional metadata to be passed into the PDF factory function. +*/ +struct Metadata { + /** The document's title. + */ + SkString fTitle; + + /** The name of the person who created the document. + */ + SkString fAuthor; + + /** The subject of the document. + */ + SkString fSubject; + + /** Keywords associated with the document. Commas may be used to delineate + keywords within the string. + */ + SkString fKeywords; + + /** If the document was converted to PDF from another format, + the name of the conforming product that created the + original document from which it was converted. + */ + SkString fCreator; + + /** The product that is converting this document to PDF. + */ + SkString fProducer = SkString("Skia/PDF m" SKPDF_STRING(SK_MILESTONE)); + + /** The date and time the document was created. + The zero default value represents an unknown/unset time. + */ + SkTime::DateTime fCreation = {0, 0, 0, 0, 0, 0, 0, 0}; + + /** The date and time the document was most recently modified. + The zero default value represents an unknown/unset time. + */ + SkTime::DateTime fModified = {0, 0, 0, 0, 0, 0, 0, 0}; + + /** The DPI (pixels-per-inch) at which features without native PDF support + will be rasterized (e.g. draw image with perspective, draw text with + perspective, ...) A larger DPI would create a PDF that reflects the + original intent with better fidelity, but it can make for larger PDF + files too, which would use more memory while rendering, and it would be + slower to be processed or sent online or to printer. + */ + SkScalar fRasterDPI = SK_ScalarDefaultRasterDPI; + + /** If true, include XMP metadata, a document UUID, and sRGB output intent + information. This adds length to the document and makes it + non-reproducable, but are necessary features for PDF/A-2b conformance + */ + bool fPDFA = false; + + /** Encoding quality controls the trade-off between size and quality. By + default this is set to 101 percent, which corresponds to lossless + encoding. If this value is set to a value <= 100, and the image is + opaque, it will be encoded (using JPEG) with that quality setting. + */ + int fEncodingQuality = 101; + + /** An optional tree of structured document tags that provide + a semantic representation of the content. The caller + should retain ownership. + */ + StructureElementNode* fStructureElementTreeRoot = nullptr; + + /** Executor to handle threaded work within PDF Backend. If this is nullptr, + then all work will be done serially on the main thread. To have worker + threads assist with various tasks, set this to a valid SkExecutor + instance. Currently used for executing Deflate algorithm in parallel. + + If set, the PDF output will be non-reproducible in the order and + internal numbering of objects, but should render the same. + + Experimental. + */ + SkExecutor* fExecutor = nullptr; + + /** PDF streams may be compressed to save space. + Use this to specify the desired compression vs time tradeoff. + */ + enum class CompressionLevel : int { + Default = -1, + None = 0, + LowButFast = 1, + Average = 6, + HighButSlow = 9, + } fCompressionLevel = CompressionLevel::Default; + + /** Preferred Subsetter. Only respected if both are compiled in. + + The Sfntly subsetter is deprecated. + + Experimental. + */ + enum Subsetter { + kHarfbuzz_Subsetter, + kSfntly_Subsetter, + } fSubsetter = kHarfbuzz_Subsetter; +}; + +/** Associate a node ID with subsequent drawing commands in an + SkCanvas. The same node ID can appear in a StructureElementNode + in order to associate a document's structure element tree with + its content. + + A node ID of zero indicates no node ID. + + @param canvas The canvas used to draw to the PDF. + @param nodeId The node ID for subsequent drawing commands. +*/ +SK_API void SetNodeId(SkCanvas* dst, int nodeID); + +/** Create a PDF-backed document, writing the results into a SkWStream. + + PDF pages are sized in point units. 1 pt == 1/72 inch == 127/360 mm. + + @param stream A PDF document will be written to this stream. The document may write + to the stream at anytime during its lifetime, until either close() is + called or the document is deleted. + @param metadata a PDFmetadata object. Any fields may be left empty. + + @returns NULL if there is an error, otherwise a newly created PDF-backed SkDocument. +*/ +SK_API sk_sp MakeDocument(SkWStream* stream, const Metadata& metadata); + +static inline sk_sp MakeDocument(SkWStream* stream) { + return MakeDocument(stream, Metadata()); +} + +} // namespace SkPDF + +#undef SKPDF_STRING +#undef SKPDF_STRING_IMPL +#endif // SkPDFDocument_DEFINED diff --git a/gfx/skia/skia/include/docs/SkXPSDocument.h b/gfx/skia/skia/include/docs/SkXPSDocument.h new file mode 100644 index 0000000000..5cd0777c9b --- /dev/null +++ b/gfx/skia/skia/include/docs/SkXPSDocument.h @@ -0,0 +1,27 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkXPSDocument_DEFINED +#define SkXPSDocument_DEFINED + +#include "include/core/SkTypes.h" + +#ifdef SK_BUILD_FOR_WIN + +#include "include/core/SkDocument.h" + +struct IXpsOMObjectFactory; + +namespace SkXPS { + +SK_API sk_sp MakeDocument(SkWStream* stream, + IXpsOMObjectFactory* xpsFactory, + SkScalar dpi = SK_ScalarDefaultRasterDPI); + +} // namespace SkXPS +#endif // SK_BUILD_FOR_WIN +#endif // SkXPSDocument_DEFINED diff --git a/gfx/skia/skia/include/effects/Sk1DPathEffect.h b/gfx/skia/skia/include/effects/Sk1DPathEffect.h new file mode 100644 index 0000000000..fd05c52df7 --- /dev/null +++ b/gfx/skia/skia/include/effects/Sk1DPathEffect.h @@ -0,0 +1,40 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef Sk1DPathEffect_DEFINED +#define Sk1DPathEffect_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +class SkPath; +class SkPathEffect; + +class SK_API SkPath1DPathEffect { +public: + enum Style { + kTranslate_Style, // translate the shape to each position + kRotate_Style, // rotate the shape about its center + kMorph_Style, // transform each point, and turn lines into curves + + kLastEnum_Style = kMorph_Style, + }; + + /** Dash by replicating the specified path. + @param path The path to replicate (dash) + @param advance The space between instances of path + @param phase distance (mod advance) along path for its initial position + @param style how to transform path at each point (based on the current + position and tangent) + */ + static sk_sp Make(const SkPath& path, SkScalar advance, SkScalar phase, Style); + + static void RegisterFlattenables(); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/Sk2DPathEffect.h b/gfx/skia/skia/include/effects/Sk2DPathEffect.h new file mode 100644 index 0000000000..b8b3ba3981 --- /dev/null +++ b/gfx/skia/skia/include/effects/Sk2DPathEffect.h @@ -0,0 +1,33 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef Sk2DPathEffect_DEFINED +#define Sk2DPathEffect_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +class SkMatrix; +class SkPath; +class SkPathEffect; + +class SK_API SkLine2DPathEffect { +public: + static sk_sp Make(SkScalar width, const SkMatrix& matrix); + + static void RegisterFlattenables(); +}; + +class SK_API SkPath2DPathEffect { +public: + static sk_sp Make(const SkMatrix& matrix, const SkPath& path); + + static void RegisterFlattenables(); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkBlenders.h b/gfx/skia/skia/include/effects/SkBlenders.h new file mode 100644 index 0000000000..7507071b05 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkBlenders.h @@ -0,0 +1,27 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlenders_DEFINED +#define SkBlenders_DEFINED + +#include "include/core/SkBlender.h" + +class SK_API SkBlenders { +public: + /** + * Create a blender that implements the following: + * k1 * src * dst + k2 * src + k3 * dst + k4 + * @param k1, k2, k3, k4 The four coefficients. + * @param enforcePMColor If true, the RGB channels will be clamped to the calculated alpha. + */ + static sk_sp Arithmetic(float k1, float k2, float k3, float k4, bool enforcePremul); + +private: + SkBlenders() = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkBlurDrawLooper.h b/gfx/skia/skia/include/effects/SkBlurDrawLooper.h new file mode 100644 index 0000000000..fc766f807a --- /dev/null +++ b/gfx/skia/skia/include/effects/SkBlurDrawLooper.h @@ -0,0 +1,26 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlurDrawLooper_DEFINED +#define SkBlurDrawLooper_DEFINED + +#include "include/core/SkDrawLooper.h" + +#ifndef SK_SUPPORT_LEGACY_DRAWLOOPER +#error "SkDrawLooper is unsupported" +#endif + +/** + * DEPRECATED: No longer supported in Skia. + */ +namespace SkBlurDrawLooper { + sk_sp SK_API Make(SkColor4f color, SkColorSpace* cs, + SkScalar sigma, SkScalar dx, SkScalar dy); + sk_sp SK_API Make(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy); +} // namespace SkBlurDrawLooper + +#endif diff --git a/gfx/skia/skia/include/effects/SkBlurMaskFilter.h b/gfx/skia/skia/include/effects/SkBlurMaskFilter.h new file mode 100644 index 0000000000..1b9319869e --- /dev/null +++ b/gfx/skia/skia/include/effects/SkBlurMaskFilter.h @@ -0,0 +1,35 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlurMaskFilter_DEFINED +#define SkBlurMaskFilter_DEFINED + +// we include this since our callers will need to at least be able to ref/unref +#include "include/core/SkBlurTypes.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" + +class SkRRect; + +class SK_API SkBlurMaskFilter { +public: +#ifdef SK_SUPPORT_LEGACY_EMBOSSMASKFILTER + /** Create an emboss maskfilter + @param blurSigma standard deviation of the Gaussian blur to apply + before applying lighting (e.g. 3) + @param direction array of 3 scalars [x, y, z] specifying the direction of the light source + @param ambient 0...1 amount of ambient light + @param specular coefficient for specular highlights (e.g. 8) + @return the emboss maskfilter + */ + static sk_sp MakeEmboss(SkScalar blurSigma, const SkScalar direction[3], + SkScalar ambient, SkScalar specular); +#endif +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkColorMatrix.h b/gfx/skia/skia/include/effects/SkColorMatrix.h new file mode 100644 index 0000000000..5092278f0d --- /dev/null +++ b/gfx/skia/skia/include/effects/SkColorMatrix.h @@ -0,0 +1,57 @@ +/* + * Copyright 2007 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorMatrix_DEFINED +#define SkColorMatrix_DEFINED + +#include "include/core/SkTypes.h" + +#include +#include + +enum SkYUVColorSpace : int; + +class SK_API SkColorMatrix { +public: + constexpr SkColorMatrix() : SkColorMatrix(1, 0, 0, 0, 0, + 0, 1, 0, 0, 0, + 0, 0, 1, 0, 0, + 0, 0, 0, 1, 0) {} + + constexpr SkColorMatrix(float m00, float m01, float m02, float m03, float m04, + float m10, float m11, float m12, float m13, float m14, + float m20, float m21, float m22, float m23, float m24, + float m30, float m31, float m32, float m33, float m34) + : fMat { m00, m01, m02, m03, m04, + m10, m11, m12, m13, m14, + m20, m21, m22, m23, m24, + m30, m31, m32, m33, m34 } {} + + static SkColorMatrix RGBtoYUV(SkYUVColorSpace); + static SkColorMatrix YUVtoRGB(SkYUVColorSpace); + + void setIdentity(); + void setScale(float rScale, float gScale, float bScale, float aScale = 1.0f); + + void postTranslate(float dr, float dg, float db, float da); + + void setConcat(const SkColorMatrix& a, const SkColorMatrix& b); + void preConcat(const SkColorMatrix& mat) { this->setConcat(*this, mat); } + void postConcat(const SkColorMatrix& mat) { this->setConcat(mat, *this); } + + void setSaturation(float sat); + + void setRowMajor(const float src[20]) { std::copy_n(src, 20, fMat.begin()); } + void getRowMajor(float dst[20]) const { std::copy_n(fMat.begin(), 20, dst); } + +private: + std::array fMat; + + friend class SkColorFilters; +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkColorMatrixFilter.h b/gfx/skia/skia/include/effects/SkColorMatrixFilter.h new file mode 100644 index 0000000000..3e5337b0cf --- /dev/null +++ b/gfx/skia/skia/include/effects/SkColorMatrixFilter.h @@ -0,0 +1,22 @@ +/* + * Copyright 2007 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorMatrixFilter_DEFINED +#define SkColorMatrixFilter_DEFINED + +#include "include/core/SkColorFilter.h" + +// (DEPRECATED) This factory function is deprecated. Please use the one in +// SkColorFilters (i.e., Lighting). +class SK_API SkColorMatrixFilter : public SkColorFilter { +public: + static sk_sp MakeLightingFilter(SkColor mul, SkColor add) { + return SkColorFilters::Lighting(mul, add); + } +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkCornerPathEffect.h b/gfx/skia/skia/include/effects/SkCornerPathEffect.h new file mode 100644 index 0000000000..7f7e7159f3 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkCornerPathEffect.h @@ -0,0 +1,32 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCornerPathEffect_DEFINED +#define SkCornerPathEffect_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +class SkPathEffect; + +/** \class SkCornerPathEffect + + SkCornerPathEffect is a subclass of SkPathEffect that can turn sharp corners + into various treatments (e.g. rounded corners) +*/ +class SK_API SkCornerPathEffect { +public: + /** radius must be > 0 to have an effect. It specifies the distance from each corner + that should be "rounded". + */ + static sk_sp Make(SkScalar radius); + + static void RegisterFlattenables(); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkDashPathEffect.h b/gfx/skia/skia/include/effects/SkDashPathEffect.h new file mode 100644 index 0000000000..f30064aa94 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkDashPathEffect.h @@ -0,0 +1,43 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDashPathEffect_DEFINED +#define SkDashPathEffect_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +class SkPathEffect; + +class SK_API SkDashPathEffect { +public: + /** intervals: array containing an even number of entries (>=2), with + the even indices specifying the length of "on" intervals, and the odd + indices specifying the length of "off" intervals. This array will be + copied in Make, and can be disposed of freely after. + count: number of elements in the intervals array + phase: offset into the intervals array (mod the sum of all of the + intervals). + + For example: if intervals[] = {10, 20}, count = 2, and phase = 25, + this will set up a dashed path like so: + 5 pixels off + 10 pixels on + 20 pixels off + 10 pixels on + 20 pixels off + ... + A phase of -5, 25, 55, 85, etc. would all result in the same path, + because the sum of all the intervals is 30. + + Note: only affects stroked paths. + */ + static sk_sp Make(const SkScalar intervals[], int count, SkScalar phase); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkDiscretePathEffect.h b/gfx/skia/skia/include/effects/SkDiscretePathEffect.h new file mode 100644 index 0000000000..6054cbdc99 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkDiscretePathEffect.h @@ -0,0 +1,37 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDiscretePathEffect_DEFINED +#define SkDiscretePathEffect_DEFINED + +#include "include/core/SkPathEffect.h" + +/** \class SkDiscretePathEffect + + This path effect chops a path into discrete segments, and randomly displaces them. +*/ +class SK_API SkDiscretePathEffect { +public: + /** Break the path into segments of segLength length, and randomly move the endpoints + away from the original path by a maximum of deviation. + Note: works on filled or framed paths + + @param seedAssist This is a caller-supplied seedAssist that modifies + the seed value that is used to randomize the path + segments' endpoints. If not supplied it defaults to 0, + in which case filtering a path multiple times will + result in the same set of segments (this is useful for + testing). If a caller does not want this behaviour + they can pass in a different seedAssist to get a + different set of path segments. + */ + static sk_sp Make(SkScalar segLength, SkScalar dev, uint32_t seedAssist = 0); + + static void RegisterFlattenables(); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkGradientShader.h b/gfx/skia/skia/include/effects/SkGradientShader.h new file mode 100644 index 0000000000..4541118230 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkGradientShader.h @@ -0,0 +1,342 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGradientShader_DEFINED +#define SkGradientShader_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkShader.h" +#include "include/core/SkTileMode.h" + +/** \class SkGradientShader + + SkGradientShader hosts factories for creating subclasses of SkShader that + render linear and radial gradients. In general, degenerate cases should not + produce surprising results, but there are several types of degeneracies: + + * A linear gradient made from the same two points. + * A radial gradient with a radius of zero. + * A sweep gradient where the start and end angle are the same. + * A two point conical gradient where the two centers and the two radii are + the same. + + For any degenerate gradient with a decal tile mode, it will draw empty since the interpolating + region is zero area and the outer region is discarded by the decal mode. + + For any degenerate gradient with a repeat or mirror tile mode, it will draw a solid color that + is the average gradient color, since infinitely many repetitions of the gradients will fill the + shape. + + For a clamped gradient, every type is well-defined at the limit except for linear gradients. The + radial gradient with zero radius becomes the last color. The sweep gradient draws the sector + from 0 to the provided angle with the first color, with a hardstop switching to the last color. + When the provided angle is 0, this is just the solid last color again. Similarly, the two point + conical gradient becomes a circle filled with the first color, sized to the provided radius, + with a hardstop switching to the last color. When the two radii are both zero, this is just the + solid last color. + + As a linear gradient approaches the degenerate case, its shader will approach the appearance of + two half planes, each filled by the first and last colors of the gradient. The planes will be + oriented perpendicular to the vector between the two defining points of the gradient. However, + once they become the same point, Skia cannot reconstruct what that expected orientation is. To + provide a stable and predictable color in this case, Skia just uses the last color as a solid + fill to be similar to many of the other degenerate gradients' behaviors in clamp mode. +*/ +class SK_API SkGradientShader { +public: + enum Flags { + /** By default gradients will interpolate their colors in unpremul space + * and then premultiply each of the results. By setting this flag, the + * gradients will premultiply their colors first, and then interpolate + * between them. + * example: https://fiddle.skia.org/c/@GradientShader_MakeLinear + */ + kInterpolateColorsInPremul_Flag = 1 << 0, + }; + + struct Interpolation { + enum class InPremul : bool { kNo = false, kYes = true }; + + enum class ColorSpace : uint8_t { + // Default Skia behavior: interpolate in the color space of the destination surface + kDestination, + + // https://www.w3.org/TR/css-color-4/#interpolation-space + kSRGBLinear, + kLab, + kOKLab, + kLCH, + kOKLCH, + kSRGB, + kHSL, + kHWB, + + kLastColorSpace = kHWB, + }; + static constexpr int kColorSpaceCount = static_cast(ColorSpace::kLastColorSpace) + 1; + + enum class HueMethod : uint8_t { + // https://www.w3.org/TR/css-color-4/#hue-interpolation + kShorter, + kLonger, + kIncreasing, + kDecreasing, + + kLastHueMethod = kDecreasing, + }; + static constexpr int kHueMethodCount = static_cast(HueMethod::kLastHueMethod) + 1; + + InPremul fInPremul = InPremul::kNo; + + /* + * NOTE: Do not use fColorSpace or fHueMethod (yet). These features are in development and + * incomplete. This comment (and RELEASE_NOTES.txt) will be updated once the features are + * ready to be used. + */ + ColorSpace fColorSpace = ColorSpace::kDestination; + HueMethod fHueMethod = HueMethod::kShorter; // Only relevant for LCH, OKLCH, HSL, or HWB + + static Interpolation FromFlags(uint32_t flags) { + return {flags & kInterpolateColorsInPremul_Flag ? InPremul::kYes : InPremul::kNo, + ColorSpace::kDestination, + HueMethod::kShorter}; + } + }; + + /** Returns a shader that generates a linear gradient between the two specified points. +

+ @param pts The start and end points for the gradient. + @param colors The array[count] of colors, to be distributed between the two points + @param pos May be NULL. array[count] of SkScalars, or NULL, of the relative position of + each corresponding color in the colors array. If this is NULL, + the the colors are distributed evenly between the start and end point. + If this is not null, the values must lie between 0.0 and 1.0, and be + strictly increasing. If the first value is not 0.0, then an additional + color stop is added at position 0.0, with the same color as colors[0]. + If the the last value is not 1.0, then an additional color stop is added + at position 1.0, with the same color as colors[count - 1]. + @param count Must be >=2. The number of colors (and pos if not NULL) entries. + @param mode The tiling mode + + example: https://fiddle.skia.org/c/@GradientShader_MakeLinear + */ + static sk_sp MakeLinear(const SkPoint pts[2], + const SkColor colors[], const SkScalar pos[], int count, + SkTileMode mode, + uint32_t flags = 0, const SkMatrix* localMatrix = nullptr); + + /** Returns a shader that generates a linear gradient between the two specified points. +

+ @param pts The start and end points for the gradient. + @param colors The array[count] of colors, to be distributed between the two points + @param pos May be NULL. array[count] of SkScalars, or NULL, of the relative position of + each corresponding color in the colors array. If this is NULL, + the the colors are distributed evenly between the start and end point. + If this is not null, the values must lie between 0.0 and 1.0, and be + strictly increasing. If the first value is not 0.0, then an additional + color stop is added at position 0.0, with the same color as colors[0]. + If the the last value is not 1.0, then an additional color stop is added + at position 1.0, with the same color as colors[count - 1]. + @param count Must be >=2. The number of colors (and pos if not NULL) entries. + @param mode The tiling mode + + example: https://fiddle.skia.org/c/@GradientShader_MakeLinear + */ + static sk_sp MakeLinear(const SkPoint pts[2], + const SkColor4f colors[], sk_sp colorSpace, + const SkScalar pos[], int count, SkTileMode mode, + const Interpolation& interpolation, + const SkMatrix* localMatrix); + static sk_sp MakeLinear(const SkPoint pts[2], + const SkColor4f colors[], sk_sp colorSpace, + const SkScalar pos[], int count, SkTileMode mode, + uint32_t flags = 0, const SkMatrix* localMatrix = nullptr) { + return MakeLinear(pts, colors, std::move(colorSpace), pos, count, mode, + Interpolation::FromFlags(flags), localMatrix); + } + + /** Returns a shader that generates a radial gradient given the center and radius. +

+ @param center The center of the circle for this gradient + @param radius Must be positive. The radius of the circle for this gradient + @param colors The array[count] of colors, to be distributed between the center and edge of the circle + @param pos May be NULL. The array[count] of SkScalars, or NULL, of the relative position of + each corresponding color in the colors array. If this is NULL, + the the colors are distributed evenly between the center and edge of the circle. + If this is not null, the values must lie between 0.0 and 1.0, and be + strictly increasing. If the first value is not 0.0, then an additional + color stop is added at position 0.0, with the same color as colors[0]. + If the the last value is not 1.0, then an additional color stop is added + at position 1.0, with the same color as colors[count - 1]. + @param count Must be >= 2. The number of colors (and pos if not NULL) entries + @param mode The tiling mode + */ + static sk_sp MakeRadial(const SkPoint& center, SkScalar radius, + const SkColor colors[], const SkScalar pos[], int count, + SkTileMode mode, + uint32_t flags = 0, const SkMatrix* localMatrix = nullptr); + + /** Returns a shader that generates a radial gradient given the center and radius. +

+ @param center The center of the circle for this gradient + @param radius Must be positive. The radius of the circle for this gradient + @param colors The array[count] of colors, to be distributed between the center and edge of the circle + @param pos May be NULL. The array[count] of SkScalars, or NULL, of the relative position of + each corresponding color in the colors array. If this is NULL, + the the colors are distributed evenly between the center and edge of the circle. + If this is not null, the values must lie between 0.0 and 1.0, and be + strictly increasing. If the first value is not 0.0, then an additional + color stop is added at position 0.0, with the same color as colors[0]. + If the the last value is not 1.0, then an additional color stop is added + at position 1.0, with the same color as colors[count - 1]. + @param count Must be >= 2. The number of colors (and pos if not NULL) entries + @param mode The tiling mode + */ + static sk_sp MakeRadial(const SkPoint& center, SkScalar radius, + const SkColor4f colors[], sk_sp colorSpace, + const SkScalar pos[], int count, SkTileMode mode, + const Interpolation& interpolation, + const SkMatrix* localMatrix); + static sk_sp MakeRadial(const SkPoint& center, SkScalar radius, + const SkColor4f colors[], sk_sp colorSpace, + const SkScalar pos[], int count, SkTileMode mode, + uint32_t flags = 0, const SkMatrix* localMatrix = nullptr) { + return MakeRadial(center, radius, colors, std::move(colorSpace), pos, count, mode, + Interpolation::FromFlags(flags), localMatrix); + } + + /** + * Returns a shader that generates a conical gradient given two circles, or + * returns NULL if the inputs are invalid. The gradient interprets the + * two circles according to the following HTML spec. + * http://dev.w3.org/html5/2dcontext/#dom-context-2d-createradialgradient + */ + static sk_sp MakeTwoPointConical(const SkPoint& start, SkScalar startRadius, + const SkPoint& end, SkScalar endRadius, + const SkColor colors[], const SkScalar pos[], + int count, SkTileMode mode, + uint32_t flags = 0, + const SkMatrix* localMatrix = nullptr); + + /** + * Returns a shader that generates a conical gradient given two circles, or + * returns NULL if the inputs are invalid. The gradient interprets the + * two circles according to the following HTML spec. + * http://dev.w3.org/html5/2dcontext/#dom-context-2d-createradialgradient + */ + static sk_sp MakeTwoPointConical(const SkPoint& start, SkScalar startRadius, + const SkPoint& end, SkScalar endRadius, + const SkColor4f colors[], + sk_sp colorSpace, const SkScalar pos[], + int count, SkTileMode mode, + const Interpolation& interpolation, + const SkMatrix* localMatrix); + static sk_sp MakeTwoPointConical(const SkPoint& start, SkScalar startRadius, + const SkPoint& end, SkScalar endRadius, + const SkColor4f colors[], + sk_sp colorSpace, const SkScalar pos[], + int count, SkTileMode mode, + uint32_t flags = 0, + const SkMatrix* localMatrix = nullptr) { + return MakeTwoPointConical(start, startRadius, end, endRadius, colors, + std::move(colorSpace), pos, count, mode, + Interpolation::FromFlags(flags), localMatrix); + } + + /** Returns a shader that generates a sweep gradient given a center. + + The shader accepts negative angles and angles larger than 360, draws + between 0 and 360 degrees, similar to the CSS conic-gradient + semantics. 0 degrees means horizontal positive x axis. The start angle + must be less than the end angle, otherwise a null pointer is + returned. If color stops do not contain 0 and 1 but are within this + range, the respective outer color stop is repeated for 0 and 1. Color + stops less than 0 are clamped to 0, and greater than 1 are clamped to 1. +

+ @param cx The X coordinate of the center of the sweep + @param cx The Y coordinate of the center of the sweep + @param colors The array[count] of colors, to be distributed around the center, within + the gradient angle range. + @param pos May be NULL. The array[count] of SkScalars, or NULL, of the relative + position of each corresponding color in the colors array. If this is + NULL, then the colors are distributed evenly within the angular range. + If this is not null, the values must lie between 0.0 and 1.0, and be + strictly increasing. If the first value is not 0.0, then an additional + color stop is added at position 0.0, with the same color as colors[0]. + If the the last value is not 1.0, then an additional color stop is added + at position 1.0, with the same color as colors[count - 1]. + @param count Must be >= 2. The number of colors (and pos if not NULL) entries + @param mode Tiling mode: controls drawing outside of the gradient angular range. + @param startAngle Start of the angular range, corresponding to pos == 0. + @param endAngle End of the angular range, corresponding to pos == 1. + */ + static sk_sp MakeSweep(SkScalar cx, SkScalar cy, + const SkColor colors[], const SkScalar pos[], int count, + SkTileMode mode, + SkScalar startAngle, SkScalar endAngle, + uint32_t flags, const SkMatrix* localMatrix); + static sk_sp MakeSweep(SkScalar cx, SkScalar cy, + const SkColor colors[], const SkScalar pos[], int count, + uint32_t flags = 0, const SkMatrix* localMatrix = nullptr) { + return MakeSweep(cx, cy, colors, pos, count, SkTileMode::kClamp, 0, 360, flags, + localMatrix); + } + + /** Returns a shader that generates a sweep gradient given a center. + + The shader accepts negative angles and angles larger than 360, draws + between 0 and 360 degrees, similar to the CSS conic-gradient + semantics. 0 degrees means horizontal positive x axis. The start angle + must be less than the end angle, otherwise a null pointer is + returned. If color stops do not contain 0 and 1 but are within this + range, the respective outer color stop is repeated for 0 and 1. Color + stops less than 0 are clamped to 0, and greater than 1 are clamped to 1. +

+ @param cx The X coordinate of the center of the sweep + @param cx The Y coordinate of the center of the sweep + @param colors The array[count] of colors, to be distributed around the center, within + the gradient angle range. + @param pos May be NULL. The array[count] of SkScalars, or NULL, of the relative + position of each corresponding color in the colors array. If this is + NULL, then the colors are distributed evenly within the angular range. + If this is not null, the values must lie between 0.0 and 1.0, and be + strictly increasing. If the first value is not 0.0, then an additional + color stop is added at position 0.0, with the same color as colors[0]. + If the the last value is not 1.0, then an additional color stop is added + at position 1.0, with the same color as colors[count - 1]. + @param count Must be >= 2. The number of colors (and pos if not NULL) entries + @param mode Tiling mode: controls drawing outside of the gradient angular range. + @param startAngle Start of the angular range, corresponding to pos == 0. + @param endAngle End of the angular range, corresponding to pos == 1. + */ + static sk_sp MakeSweep(SkScalar cx, SkScalar cy, + const SkColor4f colors[], sk_sp colorSpace, + const SkScalar pos[], int count, + SkTileMode mode, + SkScalar startAngle, SkScalar endAngle, + const Interpolation& interpolation, + const SkMatrix* localMatrix); + static sk_sp MakeSweep(SkScalar cx, SkScalar cy, + const SkColor4f colors[], sk_sp colorSpace, + const SkScalar pos[], int count, + SkTileMode mode, + SkScalar startAngle, SkScalar endAngle, + uint32_t flags, const SkMatrix* localMatrix) { + return MakeSweep(cx, cy, colors, std::move(colorSpace), pos, count, mode, startAngle, + endAngle, Interpolation::FromFlags(flags), localMatrix); + } + static sk_sp MakeSweep(SkScalar cx, SkScalar cy, + const SkColor4f colors[], sk_sp colorSpace, + const SkScalar pos[], int count, + uint32_t flags = 0, const SkMatrix* localMatrix = nullptr) { + return MakeSweep(cx, cy, colors, std::move(colorSpace), pos, count, SkTileMode::kClamp, + 0, 360, flags, localMatrix); + } +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkHighContrastFilter.h b/gfx/skia/skia/include/effects/SkHighContrastFilter.h new file mode 100644 index 0000000000..1224ade5e4 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkHighContrastFilter.h @@ -0,0 +1,84 @@ +/* +* Copyright 2017 Google Inc. +* +* Use of this source code is governed by a BSD-style license that can be +* found in the LICENSE file. +*/ + +#ifndef SkHighContrastFilter_DEFINED +#define SkHighContrastFilter_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +class SkColorFilter; + +/** + * Configuration struct for SkHighContrastFilter. + * + * Provides transformations to improve contrast for users with low vision. + */ +struct SkHighContrastConfig { + enum class InvertStyle { + kNoInvert, + kInvertBrightness, + kInvertLightness, + + kLast = kInvertLightness + }; + + SkHighContrastConfig() { + fGrayscale = false; + fInvertStyle = InvertStyle::kNoInvert; + fContrast = 0.0f; + } + + SkHighContrastConfig(bool grayscale, + InvertStyle invertStyle, + SkScalar contrast) + : fGrayscale(grayscale), + fInvertStyle(invertStyle), + fContrast(contrast) {} + + // Returns true if all of the fields are set within the valid range. + bool isValid() const { + return fInvertStyle >= InvertStyle::kNoInvert && + fInvertStyle <= InvertStyle::kInvertLightness && + fContrast >= -1.0 && + fContrast <= 1.0; + } + + // If true, the color will be converted to grayscale. + bool fGrayscale; + + // Whether to invert brightness, lightness, or neither. + InvertStyle fInvertStyle; + + // After grayscale and inverting, the contrast can be adjusted linearly. + // The valid range is -1.0 through 1.0, where 0.0 is no adjustment. + SkScalar fContrast; +}; + +/** + * Color filter that provides transformations to improve contrast + * for users with low vision. + * + * Applies the following transformations in this order. Each of these + * can be configured using SkHighContrastConfig. + * + * - Conversion to grayscale + * - Color inversion (either in RGB or HSL space) + * - Increasing the resulting contrast. + * + * Calling SkHighContrastFilter::Make will return nullptr if the config is + * not valid, e.g. if you try to call it with a contrast outside the range of + * -1.0 to 1.0. + */ + +struct SK_API SkHighContrastFilter { + // Returns the filter, or nullptr if the config is invalid. + static sk_sp Make(const SkHighContrastConfig& config); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkImageFilters.h b/gfx/skia/skia/include/effects/SkImageFilters.h new file mode 100644 index 0000000000..75d2cb0bcc --- /dev/null +++ b/gfx/skia/skia/include/effects/SkImageFilters.h @@ -0,0 +1,541 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageFilters_DEFINED +#define SkImageFilters_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkPicture.h" +#include "include/core/SkRect.h" +#include "include/core/SkTileMode.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkRuntimeEffect.h" + +#include + +class SkBlender; +class SkColorFilter; +class SkPaint; +class SkRegion; + +namespace skif { + static constexpr SkRect kNoCropRect = {SK_ScalarNegativeInfinity, SK_ScalarNegativeInfinity, + SK_ScalarInfinity, SK_ScalarInfinity}; +} + +// A set of factory functions providing useful SkImageFilter effects. For image filters that take an +// input filter, providing nullptr means it will automatically use the dynamic source image. This +// source depends on how the filter is applied, but is either the contents of a saved layer when +// drawing with SkCanvas, or an explicit SkImage if using SkImage::makeWithFilter. +class SK_API SkImageFilters { +public: + // This is just a convenience type to allow passing SkIRects, SkRects, and optional pointers + // to those types as a crop rect for the image filter factories. It's not intended to be used + // directly. + struct CropRect { + CropRect() : fCropRect(skif::kNoCropRect) {} + // Intentionally not explicit so callers don't have to use this type but can use SkIRect or + // SkRect as desired. + CropRect(std::nullptr_t) : fCropRect(skif::kNoCropRect) {} + CropRect(const SkIRect& crop) : fCropRect(SkRect::Make(crop)) {} + CropRect(const SkRect& crop) : fCropRect(crop) {} + CropRect(const SkIRect* optionalCrop) : fCropRect(optionalCrop ? SkRect::Make(*optionalCrop) + : skif::kNoCropRect) {} + CropRect(const SkRect* optionalCrop) : fCropRect(optionalCrop ? *optionalCrop + : skif::kNoCropRect) {} + + operator const SkRect*() const { return fCropRect == skif::kNoCropRect ? nullptr : &fCropRect; } + + SkRect fCropRect; + }; + + /** + * Create a filter that updates the alpha of the image based on 'region'. Pixels inside the + * region are made more opaque and pixels outside are made more transparent. + * + * Specifically, if a pixel is inside the region, its alpha will be set to + * max(innerMin, pixel's alpha). If a pixel is outside the region, its alpha will be updated to + * min(outerMax, pixel's alpha). + * @param region The geometric region controlling the inner and outer alpha thresholds. + * @param innerMin The minimum alpha value for pixels inside 'region'. + * @param outerMax The maximum alpha value for pixels outside of 'region'. + * @param input The input filter, or uses the source bitmap if this is null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp AlphaThreshold(const SkRegion& region, SkScalar innerMin, + SkScalar outerMax, sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that implements a custom blend mode. Each output pixel is the result of + * combining the corresponding background and foreground pixels using the 4 coefficients: + * k1 * foreground * background + k2 * foreground + k3 * background + k4 + * @param k1, k2, k3, k4 The four coefficients used to combine the foreground and background. + * @param enforcePMColor If true, the RGB channels will be clamped to the calculated alpha. + * @param background The background content, using the source bitmap when this is null. + * @param foreground The foreground content, using the source bitmap when this is null. + * @param cropRect Optional rectangle that crops the inputs and output. + */ + static sk_sp Arithmetic(SkScalar k1, SkScalar k2, SkScalar k3, SkScalar k4, + bool enforcePMColor, sk_sp background, + sk_sp foreground, + const CropRect& cropRect = {}); + + /** + * This filter takes an SkBlendMode and uses it to composite the two filters together. + * @param mode The blend mode that defines the compositing operation + * @param background The Dst pixels used in blending, if null the source bitmap is used. + * @param foreground The Src pixels used in blending, if null the source bitmap is used. + * @cropRect Optional rectangle to crop input and output. + */ + static sk_sp Blend(SkBlendMode mode, sk_sp background, + sk_sp foreground = nullptr, + const CropRect& cropRect = {}); + + /** + * This filter takes an SkBlendMode and uses it to composite the two filters together. + * @param blender The blender that defines the compositing operation + * @param background The Dst pixels used in blending, if null the source bitmap is used. + * @param foreground The Src pixels used in blending, if null the source bitmap is used. + * @cropRect Optional rectangle to crop input and output. + */ + static sk_sp Blend(sk_sp blender, sk_sp background, + sk_sp foreground = nullptr, + const CropRect& cropRect = {}); + + /** + * Create a filter that blurs its input by the separate X and Y sigmas. The provided tile mode + * is used when the blur kernel goes outside the input image. + * @param sigmaX The Gaussian sigma value for blurring along the X axis. + * @param sigmaY The Gaussian sigma value for blurring along the Y axis. + * @param tileMode The tile mode applied at edges . + * TODO (michaelludwig) - kMirror is not supported yet + * @param input The input filter that is blurred, uses source bitmap if this is null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp Blur(SkScalar sigmaX, SkScalar sigmaY, SkTileMode tileMode, + sk_sp input, const CropRect& cropRect = {}); + // As above, but defaults to the decal tile mode. + static sk_sp Blur(SkScalar sigmaX, SkScalar sigmaY, sk_sp input, + const CropRect& cropRect = {}) { + return Blur(sigmaX, sigmaY, SkTileMode::kDecal, std::move(input), cropRect); + } + + /** + * Create a filter that applies the color filter to the input filter results. + * @param cf The color filter that transforms the input image. + * @param input The input filter, or uses the source bitmap if this is null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp ColorFilter(sk_sp cf, sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that composes 'inner' with 'outer', such that the results of 'inner' are + * treated as the source bitmap passed to 'outer', i.e. result = outer(inner(source)). + * @param outer The outer filter that evaluates the results of inner. + * @param inner The inner filter that produces the input to outer. + */ + static sk_sp Compose(sk_sp outer, sk_sp inner); + + /** + * Create a filter that moves each pixel in its color input based on an (x,y) vector encoded + * in its displacement input filter. Two color components of the displacement image are + * mapped into a vector as scale * (color[xChannel], color[yChannel]), where the channel + * selectors are one of R, G, B, or A. + * @param xChannelSelector RGBA channel that encodes the x displacement per pixel. + * @param yChannelSelector RGBA channel that encodes the y displacement per pixel. + * @param scale Scale applied to displacement extracted from image. + * @param displacement The filter defining the displacement image, or null to use source. + * @param color The filter providing the color pixels to be displaced. If null, + * it will use the source. + * @param cropRect Optional rectangle that crops the color input and output. + */ + static sk_sp DisplacementMap(SkColorChannel xChannelSelector, + SkColorChannel yChannelSelector, + SkScalar scale, sk_sp displacement, + sk_sp color, + const CropRect& cropRect = {}); + + /** + * Create a filter that draws a drop shadow under the input content. This filter produces an + * image that includes the inputs' content. + * @param dx The X offset of the shadow. + * @param dy The Y offset of the shadow. + * @param sigmaX The blur radius for the shadow, along the X axis. + * @param sigmaY The blur radius for the shadow, along the Y axis. + * @param color The color of the drop shadow. + * @param input The input filter, or will use the source bitmap if this is null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp DropShadow(SkScalar dx, SkScalar dy, + SkScalar sigmaX, SkScalar sigmaY, + SkColor color, sk_sp input, + const CropRect& cropRect = {}); + /** + * Create a filter that renders a drop shadow, in exactly the same manner as ::DropShadow, + * except that the resulting image does not include the input content. This allows the shadow + * and input to be composed by a filter DAG in a more flexible manner. + * @param dx The X offset of the shadow. + * @param dy The Y offset of the shadow. + * @param sigmaX The blur radius for the shadow, along the X axis. + * @param sigmaY The blur radius for the shadow, along the Y axis. + * @param color The color of the drop shadow. + * @param input The input filter, or will use the source bitmap if this is null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp DropShadowOnly(SkScalar dx, SkScalar dy, + SkScalar sigmaX, SkScalar sigmaY, + SkColor color, sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that draws the 'srcRect' portion of image into 'dstRect' using the given + * filter quality. Similar to SkCanvas::drawImageRect. Returns null if 'image' is null. + * @param image The image that is output by the filter, subset by 'srcRect'. + * @param srcRect The source pixels sampled into 'dstRect' + * @param dstRect The local rectangle to draw the image into. + * @param sampling The sampling to use when drawing the image. + */ + static sk_sp Image(sk_sp image, const SkRect& srcRect, + const SkRect& dstRect, const SkSamplingOptions& sampling); + + /** + * Create a filter that draws the image using the given sampling. + * Similar to SkCanvas::drawImage. Returns null if 'image' is null. + * @param image The image that is output by the filter. + * @param sampling The sampling to use when drawing the image. + */ + static sk_sp Image(sk_sp image, const SkSamplingOptions& sampling) { + if (image) { + SkRect r = SkRect::Make(image->bounds()); + return Image(std::move(image), r, r, sampling); + } else { + return nullptr; + } + } + + /** + * Create a filter that draws the image using Mitchel cubic resampling. + * @param image The image that is output by the filter. + */ + static sk_sp Image(sk_sp image) { + return Image(std::move(image), SkSamplingOptions({1/3.0f, 1/3.0f})); + } + + /** + * Create a filter that mimics a zoom/magnifying lens effect. + * @param srcRect + * @param inset + * @param input The input filter that is magnified, if null the source bitmap is used. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp Magnifier(const SkRect& srcRect, SkScalar inset, + sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that applies an NxM image processing kernel to the input image. This can be + * used to produce effects such as sharpening, blurring, edge detection, etc. + * @param kernelSize The kernel size in pixels, in each dimension (N by M). + * @param kernel The image processing kernel. Must contain N * M elements, in row order. + * @param gain A scale factor applied to each pixel after convolution. This can be + * used to normalize the kernel, if it does not already sum to 1. + * @param bias A bias factor added to each pixel after convolution. + * @param kernelOffset An offset applied to each pixel coordinate before convolution. + * This can be used to center the kernel over the image + * (e.g., a 3x3 kernel should have an offset of {1, 1}). + * @param tileMode How accesses outside the image are treated. + * TODO (michaelludwig) - kMirror is not supported yet + * @param convolveAlpha If true, all channels are convolved. If false, only the RGB channels + * are convolved, and alpha is copied from the source image. + * @param input The input image filter, if null the source bitmap is used instead. + * @param cropRect Optional rectangle to which the output processing will be limited. + */ + static sk_sp MatrixConvolution(const SkISize& kernelSize, + const SkScalar kernel[], SkScalar gain, + SkScalar bias, const SkIPoint& kernelOffset, + SkTileMode tileMode, bool convolveAlpha, + sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that transforms the input image by 'matrix'. This matrix transforms the + * local space, which means it effectively happens prior to any transformation coming from the + * SkCanvas initiating the filtering. + * @param matrix The matrix to apply to the original content. + * @param sampling How the image will be sampled when it is transformed + * @param input The image filter to transform, or null to use the source image. + */ + static sk_sp MatrixTransform(const SkMatrix& matrix, + const SkSamplingOptions& sampling, + sk_sp input); + + /** + * Create a filter that merges the 'count' filters together by drawing their results in order + * with src-over blending. + * @param filters The input filter array to merge, which must have 'count' elements. Any null + * filter pointers will use the source bitmap instead. + * @param count The number of input filters to be merged. + * @param cropRect Optional rectangle that crops all input filters and the output. + */ + static sk_sp Merge(sk_sp* const filters, int count, + const CropRect& cropRect = {}); + /** + * Create a filter that merges the results of the two filters together with src-over blending. + * @param first The first input filter, or the source bitmap if this is null. + * @param second The second input filter, or the source bitmap if this null. + * @param cropRect Optional rectangle that crops the inputs and output. + */ + static sk_sp Merge(sk_sp first, sk_sp second, + const CropRect& cropRect = {}) { + sk_sp array[] = { std::move(first), std::move(second) }; + return Merge(array, 2, cropRect); + } + + /** + * Create a filter that offsets the input filter by the given vector. + * @param dx The x offset in local space that the image is shifted. + * @param dy The y offset in local space that the image is shifted. + * @param input The input that will be moved, if null the source bitmap is used instead. + * @param cropRect Optional rectangle to crop the input and output. + */ + static sk_sp Offset(SkScalar dx, SkScalar dy, sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that produces the SkPicture as its output, drawn into targetRect. Note that + * the targetRect is not the same as the SkIRect cropRect that many filters accept. Returns + * null if 'pic' is null. + * @param pic The picture that is drawn for the filter output. + * @param targetRect The drawing region for the picture. + */ + static sk_sp Picture(sk_sp pic, const SkRect& targetRect); + // As above, but uses SkPicture::cullRect for the drawing region. + static sk_sp Picture(sk_sp pic) { + SkRect target = pic ? pic->cullRect() : SkRect::MakeEmpty(); + return Picture(std::move(pic), target); + } + +#ifdef SK_ENABLE_SKSL + /** + * Create a filter that fills the output with the per-pixel evaluation of the SkShader produced + * by the SkRuntimeShaderBuilder. The shader is defined in the image filter's local coordinate + * system, so it will automatically be affected by SkCanvas' transform. + * + * @param builder The builder used to produce the runtime shader, that will in turn + * fill the result image + * @param childShaderName The name of the child shader defined in the builder that will be + * bound to the input param (or the source image if the input param + * is null). If empty, the builder can have exactly one child shader, + * which automatically binds the input param. + * @param input The image filter that will be provided as input to the runtime + * shader. If null the implicit source image is used instead + */ + static sk_sp RuntimeShader(const SkRuntimeShaderBuilder& builder, + std::string_view childShaderName, + sk_sp input); + + /** + * Create a filter that fills the output with the per-pixel evaluation of the SkShader produced + * by the SkRuntimeShaderBuilder. The shader is defined in the image filter's local coordinate + * system, so it will automatically be affected by SkCanvas' transform. + * + * @param builder The builder used to produce the runtime shader, that will in turn + * fill the result image + * @param childShaderNames The names of the child shaders defined in the builder that will be + * bound to the input params (or the source image if the input param + * is null). If any name is null, or appears more than once, factory + * fails and returns nullptr. + * @param inputs The image filters that will be provided as input to the runtime + * shader. If any are null, the implicit source image is used instead. + * @param inputCount How many entries are present in 'childShaderNames' and 'inputs'. + */ + static sk_sp RuntimeShader(const SkRuntimeShaderBuilder& builder, + std::string_view childShaderNames[], + const sk_sp inputs[], + int inputCount); +#endif // SK_ENABLE_SKSL + + enum class Dither : bool { + kNo = false, + kYes = true + }; + + /** + * Create a filter that fills the output with the per-pixel evaluation of the SkShader. The + * shader is defined in the image filter's local coordinate system, so will automatically + * be affected by SkCanvas' transform. + * + * Like Image() and Picture(), this is a leaf filter that can be used to introduce inputs to + * a complex filter graph, but should generally be combined with a filter that as at least + * one null input to use the implicit source image. + * @param shader The shader that fills the result image + */ + static sk_sp Shader(sk_sp shader, const CropRect& cropRect = {}) { + return Shader(std::move(shader), Dither::kNo, cropRect); + } + static sk_sp Shader(sk_sp shader, Dither dither, + const CropRect& cropRect = {}); + + /** + * Create a tile image filter. + * @param src Defines the pixels to tile + * @param dst Defines the pixel region that the tiles will be drawn to + * @param input The input that will be tiled, if null the source bitmap is used instead. + */ + static sk_sp Tile(const SkRect& src, const SkRect& dst, + sk_sp input); + + // Morphology filter effects + + /** + * Create a filter that dilates each input pixel's channel values to the max value within the + * given radii along the x and y axes. + * @param radiusX The distance to dilate along the x axis to either side of each pixel. + * @param radiusY The distance to dilate along the y axis to either side of each pixel. + * @param input The image filter that is dilated, using source bitmap if this is null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp Dilate(SkScalar radiusX, SkScalar radiusY, + sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that erodes each input pixel's channel values to the minimum channel value + * within the given radii along the x and y axes. + * @param radiusX The distance to erode along the x axis to either side of each pixel. + * @param radiusY The distance to erode along the y axis to either side of each pixel. + * @param input The image filter that is eroded, using source bitmap if this is null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp Erode(SkScalar radiusX, SkScalar radiusY, + sk_sp input, + const CropRect& cropRect = {}); + + // Lighting filter effects + + /** + * Create a filter that calculates the diffuse illumination from a distant light source, + * interpreting the alpha channel of the input as the height profile of the surface (to + * approximate normal vectors). + * @param direction The direction to the distance light. + * @param lightColor The color of the diffuse light source. + * @param surfaceScale Scale factor to transform from alpha values to physical height. + * @param kd Diffuse reflectance coefficient. + * @param input The input filter that defines surface normals (as alpha), or uses the + * source bitmap when null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp DistantLitDiffuse(const SkPoint3& direction, SkColor lightColor, + SkScalar surfaceScale, SkScalar kd, + sk_sp input, + const CropRect& cropRect = {}); + /** + * Create a filter that calculates the diffuse illumination from a point light source, using + * alpha channel of the input as the height profile of the surface (to approximate normal + * vectors). + * @param location The location of the point light. + * @param lightColor The color of the diffuse light source. + * @param surfaceScale Scale factor to transform from alpha values to physical height. + * @param kd Diffuse reflectance coefficient. + * @param input The input filter that defines surface normals (as alpha), or uses the + * source bitmap when null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp PointLitDiffuse(const SkPoint3& location, SkColor lightColor, + SkScalar surfaceScale, SkScalar kd, + sk_sp input, + const CropRect& cropRect = {}); + /** + * Create a filter that calculates the diffuse illumination from a spot light source, using + * alpha channel of the input as the height profile of the surface (to approximate normal + * vectors). The spot light is restricted to be within 'cutoffAngle' of the vector between + * the location and target. + * @param location The location of the spot light. + * @param target The location that the spot light is point towards + * @param falloffExponent Exponential falloff parameter for illumination outside of cutoffAngle + * @param cutoffAngle Maximum angle from lighting direction that receives full light + * @param lightColor The color of the diffuse light source. + * @param surfaceScale Scale factor to transform from alpha values to physical height. + * @param kd Diffuse reflectance coefficient. + * @param input The input filter that defines surface normals (as alpha), or uses the + * source bitmap when null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp SpotLitDiffuse(const SkPoint3& location, const SkPoint3& target, + SkScalar falloffExponent, SkScalar cutoffAngle, + SkColor lightColor, SkScalar surfaceScale, + SkScalar kd, sk_sp input, + const CropRect& cropRect = {}); + + /** + * Create a filter that calculates the specular illumination from a distant light source, + * interpreting the alpha channel of the input as the height profile of the surface (to + * approximate normal vectors). + * @param direction The direction to the distance light. + * @param lightColor The color of the specular light source. + * @param surfaceScale Scale factor to transform from alpha values to physical height. + * @param ks Specular reflectance coefficient. + * @param shininess The specular exponent determining how shiny the surface is. + * @param input The input filter that defines surface normals (as alpha), or uses the + * source bitmap when null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp DistantLitSpecular(const SkPoint3& direction, SkColor lightColor, + SkScalar surfaceScale, SkScalar ks, + SkScalar shininess, sk_sp input, + const CropRect& cropRect = {}); + /** + * Create a filter that calculates the specular illumination from a point light source, using + * alpha channel of the input as the height profile of the surface (to approximate normal + * vectors). + * @param location The location of the point light. + * @param lightColor The color of the specular light source. + * @param surfaceScale Scale factor to transform from alpha values to physical height. + * @param ks Specular reflectance coefficient. + * @param shininess The specular exponent determining how shiny the surface is. + * @param input The input filter that defines surface normals (as alpha), or uses the + * source bitmap when null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp PointLitSpecular(const SkPoint3& location, SkColor lightColor, + SkScalar surfaceScale, SkScalar ks, + SkScalar shininess, sk_sp input, + const CropRect& cropRect = {}); + /** + * Create a filter that calculates the specular illumination from a spot light source, using + * alpha channel of the input as the height profile of the surface (to approximate normal + * vectors). The spot light is restricted to be within 'cutoffAngle' of the vector between + * the location and target. + * @param location The location of the spot light. + * @param target The location that the spot light is point towards + * @param falloffExponent Exponential falloff parameter for illumination outside of cutoffAngle + * @param cutoffAngle Maximum angle from lighting direction that receives full light + * @param lightColor The color of the specular light source. + * @param surfaceScale Scale factor to transform from alpha values to physical height. + * @param ks Specular reflectance coefficient. + * @param shininess The specular exponent determining how shiny the surface is. + * @param input The input filter that defines surface normals (as alpha), or uses the + * source bitmap when null. + * @param cropRect Optional rectangle that crops the input and output. + */ + static sk_sp SpotLitSpecular(const SkPoint3& location, const SkPoint3& target, + SkScalar falloffExponent, SkScalar cutoffAngle, + SkColor lightColor, SkScalar surfaceScale, + SkScalar ks, SkScalar shininess, + sk_sp input, + const CropRect& cropRect = {}); + +private: + SkImageFilters() = delete; +}; + +#endif // SkImageFilters_DEFINED diff --git a/gfx/skia/skia/include/effects/SkLayerDrawLooper.h b/gfx/skia/skia/include/effects/SkLayerDrawLooper.h new file mode 100644 index 0000000000..1e875b58cc --- /dev/null +++ b/gfx/skia/skia/include/effects/SkLayerDrawLooper.h @@ -0,0 +1,161 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLayerDrawLooper_DEFINED +#define SkLayerDrawLooper_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkDrawLooper.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" + +#ifndef SK_SUPPORT_LEGACY_DRAWLOOPER +#error "SkDrawLooper is unsupported" +#endif + +/** + * DEPRECATED: No longer supported by Skia. + */ +class SK_API SkLayerDrawLooper : public SkDrawLooper { +public: + ~SkLayerDrawLooper() override; + + /** + * Bits specifies which aspects of the layer's paint should replace the + * corresponding aspects on the draw's paint. + * kEntirePaint_Bits means use the layer's paint completely. + * 0 means ignore the layer's paint... except for fColorMode, which is + * always applied. + */ + enum Bits { + kStyle_Bit = 1 << 0, //!< use this layer's Style/stroke settings + kPathEffect_Bit = 1 << 2, //!< use this layer's patheffect + kMaskFilter_Bit = 1 << 3, //!< use this layer's maskfilter + kShader_Bit = 1 << 4, //!< use this layer's shader + kColorFilter_Bit = 1 << 5, //!< use this layer's colorfilter + kXfermode_Bit = 1 << 6, //!< use this layer's xfermode + + // unsupported kTextSkewX_Bit = 1 << 1, + + /** + * Use the layer's paint entirely, with these exceptions: + * - We never override the draw's paint's text_encoding, since that is + * used to interpret the text/len parameters in draw[Pos]Text. + * - Color is always computed using the LayerInfo's fColorMode. + */ + kEntirePaint_Bits = -1 + + }; + typedef int32_t BitFlags; + + /** + * Info for how to apply the layer's paint and offset. + * + * fColorMode controls how we compute the final color for the layer: + * The layer's paint's color is treated as the SRC + * The draw's paint's color is treated as the DST + * final-color = Mode(layers-color, draws-color); + * Any SkBlendMode will work. Two common choices are: + * kSrc: to use the layer's color, ignoring the draw's + * kDst: to just keep the draw's color, ignoring the layer's + */ + struct SK_API LayerInfo { + BitFlags fPaintBits; + SkBlendMode fColorMode; + SkVector fOffset; + bool fPostTranslate; //!< applies to fOffset + + /** + * Initial the LayerInfo. Defaults to settings that will draw the + * layer with no changes: e.g. + * fPaintBits == 0 + * fColorMode == kDst_Mode + * fOffset == (0, 0) + */ + LayerInfo(); + }; + + SkDrawLooper::Context* makeContext(SkArenaAlloc*) const override; + + bool asABlurShadow(BlurShadowRec* rec) const override; + +protected: + SkLayerDrawLooper(); + + void flatten(SkWriteBuffer&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkLayerDrawLooper) + + struct Rec { + Rec* fNext; + SkPaint fPaint; + LayerInfo fInfo; + }; + Rec* fRecs; + int fCount; + + // state-machine during the init/next cycle + class LayerDrawLooperContext : public SkDrawLooper::Context { + public: + explicit LayerDrawLooperContext(const SkLayerDrawLooper* looper); + + protected: + bool next(Info*, SkPaint* paint) override; + + private: + Rec* fCurrRec; + + static void ApplyInfo(SkPaint* dst, const SkPaint& src, const LayerInfo&); + }; + + using INHERITED = SkDrawLooper; + +public: + class SK_API Builder { + public: + Builder(); + + ~Builder(); + + /** + * Call for each layer you want to add (from top to bottom). + * This returns a paint you can modify, but that ptr is only valid until + * the next call made to addLayer(). + */ + SkPaint* addLayer(const LayerInfo&); + + /** + * This layer will draw with the original paint, at the specified offset + */ + void addLayer(SkScalar dx, SkScalar dy); + + /** + * This layer will with the original paint and no offset. + */ + void addLayer() { this->addLayer(0, 0); } + + /// Similar to addLayer, but adds a layer to the top. + SkPaint* addLayerOnTop(const LayerInfo&); + + /** + * Pass list of layers on to newly built looper and return it. This will + * also reset the builder, so it can be used to build another looper. + */ + sk_sp detach(); + + private: + Builder(const Builder&) = delete; + Builder& operator=(const Builder&) = delete; + + Rec* fRecs; + Rec* fTopRec; + int fCount; + }; +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkLumaColorFilter.h b/gfx/skia/skia/include/effects/SkLumaColorFilter.h new file mode 100644 index 0000000000..41a9a45f3f --- /dev/null +++ b/gfx/skia/skia/include/effects/SkLumaColorFilter.h @@ -0,0 +1,37 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLumaColorFilter_DEFINED +#define SkLumaColorFilter_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkColorFilter; + +/** + * SkLumaColorFilter multiplies the luma of its input into the alpha channel, + * and sets the red, green, and blue channels to zero. + * + * SkLumaColorFilter(r,g,b,a) = {0,0,0, a * luma(r,g,b)} + * + * This is similar to a luminanceToAlpha feColorMatrix, + * but note how this filter folds in the previous alpha, + * something an feColorMatrix cannot do. + * + * feColorMatrix(luminanceToAlpha; r,g,b,a) = {0,0,0, luma(r,g,b)} + * + * (Despite its name, an feColorMatrix using luminanceToAlpha does + * actually compute luma, a dot-product of gamma-encoded color channels, + * not luminance, a dot-product of linear color channels. So at least + * SkLumaColorFilter and feColorMatrix+luminanceToAlpha agree there.) + */ +struct SK_API SkLumaColorFilter { + static sk_sp Make(); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkOpPathEffect.h b/gfx/skia/skia/include/effects/SkOpPathEffect.h new file mode 100644 index 0000000000..3c9110f0cc --- /dev/null +++ b/gfx/skia/skia/include/effects/SkOpPathEffect.h @@ -0,0 +1,43 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOpPathEffect_DEFINED +#define SkOpPathEffect_DEFINED + +#include "include/core/SkPaint.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" + +class SkMatrix; +class SkPathEffect; + +class SK_API SkMergePathEffect { +public: + /* Defers to two other patheffects, and then combines their outputs using the specified op. + * e.g. + * result = output_one op output_two + * + * If either one or two is nullptr, then the original path is passed through to the op. + */ + static sk_sp Make(sk_sp one, sk_sp two, SkPathOp op); +}; + +class SK_API SkMatrixPathEffect { +public: + static sk_sp MakeTranslate(SkScalar dx, SkScalar dy); + static sk_sp Make(const SkMatrix&); +}; + +class SK_API SkStrokePathEffect { +public: + static sk_sp Make(SkScalar width, SkPaint::Join, SkPaint::Cap, + SkScalar miter = 4); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkOverdrawColorFilter.h b/gfx/skia/skia/include/effects/SkOverdrawColorFilter.h new file mode 100644 index 0000000000..5f1642483a --- /dev/null +++ b/gfx/skia/skia/include/effects/SkOverdrawColorFilter.h @@ -0,0 +1,32 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkColorFilter; + +#ifndef SkOverdrawColorFilter_DEFINED +#define SkOverdrawColorFilter_DEFINED + +/** + * Uses the value in the src alpha channel to set the dst pixel. + * 0 -> colors[0] + * 1 -> colors[1] + * ... + * 5 (or larger) -> colors[5] + * + */ +class SK_API SkOverdrawColorFilter { +public: + static constexpr int kNumColors = 6; + + static sk_sp MakeWithSkColors(const SkColor[kNumColors]); +}; + +#endif // SkOverdrawColorFilter_DEFINED diff --git a/gfx/skia/skia/include/effects/SkPerlinNoiseShader.h b/gfx/skia/skia/include/effects/SkPerlinNoiseShader.h new file mode 100644 index 0000000000..f94b3420fc --- /dev/null +++ b/gfx/skia/skia/include/effects/SkPerlinNoiseShader.h @@ -0,0 +1,54 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPerlinNoiseShader_DEFINED +#define SkPerlinNoiseShader_DEFINED + +#include "include/core/SkShader.h" + +/** \class SkPerlinNoiseShader + + SkPerlinNoiseShader creates an image using the Perlin turbulence function. + + It can produce tileable noise if asked to stitch tiles and provided a tile size. + In order to fill a large area with repeating noise, set the stitchTiles flag to + true, and render exactly a single tile of noise. Without this flag, the result + will contain visible seams between tiles. + + The algorithm used is described here : + http://www.w3.org/TR/SVG/filters.html#feTurbulenceElement +*/ +class SK_API SkPerlinNoiseShader { +public: + /** + * This will construct Perlin noise of the given type (Fractal Noise or Turbulence). + * + * Both base frequencies (X and Y) have a usual range of (0..1) and must be non-negative. + * + * The number of octaves provided should be fairly small, with a limit of 255 enforced. + * Each octave doubles the frequency, so 10 octaves would produce noise from + * baseFrequency * 1, * 2, * 4, ..., * 512, which quickly yields insignificantly small + * periods and resembles regular unstructured noise rather than Perlin noise. + * + * If tileSize isn't NULL or an empty size, the tileSize parameter will be used to modify + * the frequencies so that the noise will be tileable for the given tile size. If tileSize + * is NULL or an empty size, the frequencies will be used as is without modification. + */ + static sk_sp MakeFractalNoise(SkScalar baseFrequencyX, SkScalar baseFrequencyY, + int numOctaves, SkScalar seed, + const SkISize* tileSize = nullptr); + static sk_sp MakeTurbulence(SkScalar baseFrequencyX, SkScalar baseFrequencyY, + int numOctaves, SkScalar seed, + const SkISize* tileSize = nullptr); + + static void RegisterFlattenables(); + +private: + SkPerlinNoiseShader() = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkRuntimeEffect.h b/gfx/skia/skia/include/effects/SkRuntimeEffect.h new file mode 100644 index 0000000000..81246d4020 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkRuntimeEffect.h @@ -0,0 +1,541 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRuntimeEffect_DEFINED +#define SkRuntimeEffect_DEFINED + +#include "include/core/SkBlender.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkData.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkShader.h" +#include "include/core/SkSpan.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLSampleUsage.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTemplates.h" + +#include +#include +#include + +#ifdef SK_ENABLE_SKSL + +#include "include/sksl/SkSLVersion.h" + +class GrRecordingContext; +class SkFilterColorProgram; +class SkImage; +class SkRuntimeImageFilter; + +namespace SkSL { +class DebugTrace; +class ErrorReporter; +class FunctionDefinition; +struct Program; +enum class ProgramKind : int8_t; +struct ProgramSettings; +} // namespace SkSL + +namespace skvm { +class Program; +} + +namespace SkSL::RP { +class Program; +} + +/* + * SkRuntimeEffect supports creating custom SkShader and SkColorFilter objects using Skia's SkSL + * shading language. + * + * NOTE: This API is experimental and subject to change. + */ +class SK_API SkRuntimeEffect : public SkRefCnt { +public: + // Reflected description of a uniform variable in the effect's SkSL + struct Uniform { + enum class Type { + kFloat, + kFloat2, + kFloat3, + kFloat4, + kFloat2x2, + kFloat3x3, + kFloat4x4, + kInt, + kInt2, + kInt3, + kInt4, + }; + + enum Flags { + // Uniform is declared as an array. 'count' contains array length. + kArray_Flag = 0x1, + + // Uniform is declared with layout(color). Colors should be supplied as unpremultiplied, + // extended-range (unclamped) sRGB (ie SkColor4f). The uniform will be automatically + // transformed to unpremultiplied extended-range working-space colors. + kColor_Flag = 0x2, + + // When used with SkMeshSpecification, indicates that the uniform is present in the + // vertex shader. Not used with SkRuntimeEffect. + kVertex_Flag = 0x4, + + // When used with SkMeshSpecification, indicates that the uniform is present in the + // fragment shader. Not used with SkRuntimeEffect. + kFragment_Flag = 0x8, + + // This flag indicates that the SkSL uniform uses a medium-precision type + // (i.e., `half` instead of `float`). + kHalfPrecision_Flag = 0x10, + }; + + std::string_view name; + size_t offset; + Type type; + int count; + uint32_t flags; + + bool isArray() const { return SkToBool(this->flags & kArray_Flag); } + bool isColor() const { return SkToBool(this->flags & kColor_Flag); } + size_t sizeInBytes() const; + }; + + // Reflected description of a uniform child (shader or colorFilter) in the effect's SkSL + enum class ChildType { + kShader, + kColorFilter, + kBlender, + }; + + struct Child { + std::string_view name; + ChildType type; + int index; + }; + + class Options { + public: + // For testing purposes, disables optimization and inlining. (Normally, Runtime Effects + // don't run the inliner directly, but they still get an inlining pass once they are + // painted.) + bool forceUnoptimized = false; + + private: + friend class SkRuntimeEffect; + friend class SkRuntimeEffectPriv; + + // This flag allows Runtime Effects to access Skia implementation details like sk_FragCoord + // and functions with private identifiers (e.g. $rgb_to_hsl). + bool allowPrivateAccess = false; + + // TODO(skia:11209) - Replace this with a promised SkCapabilities? + // This flag lifts the ES2 restrictions on Runtime Effects that are gated by the + // `strictES2Mode` check. Be aware that the software renderer and pipeline-stage effect are + // still largely ES3-unaware and can still fail or crash if post-ES2 features are used. + // This is only intended for use by tests and certain internally created effects. + SkSL::Version maxVersionAllowed = SkSL::Version::k100; + }; + + // If the effect is compiled successfully, `effect` will be non-null. + // Otherwise, `errorText` will contain the reason for failure. + struct Result { + sk_sp effect; + SkString errorText; + }; + + // MakeForColorFilter and MakeForShader verify that the SkSL code is valid for those stages of + // the Skia pipeline. In all of the signatures described below, color parameters and return + // values are flexible. They are listed as being 'vec4', but they can also be 'half4' or + // 'float4'. ('vec4' is an alias for 'float4'). + + // We can't use a default argument for `options` due to a bug in Clang. + // https://bugs.llvm.org/show_bug.cgi?id=36684 + + // Color filter SkSL requires an entry point that looks like: + // vec4 main(vec4 inColor) { ... } + static Result MakeForColorFilter(SkString sksl, const Options&); + static Result MakeForColorFilter(SkString sksl) { + return MakeForColorFilter(std::move(sksl), Options{}); + } + + // Shader SkSL requires an entry point that looks like: + // vec4 main(vec2 inCoords) { ... } + static Result MakeForShader(SkString sksl, const Options&); + static Result MakeForShader(SkString sksl) { + return MakeForShader(std::move(sksl), Options{}); + } + + // Blend SkSL requires an entry point that looks like: + // vec4 main(vec4 srcColor, vec4 dstColor) { ... } + static Result MakeForBlender(SkString sksl, const Options&); + static Result MakeForBlender(SkString sksl) { + return MakeForBlender(std::move(sksl), Options{}); + } + + // Object that allows passing a SkShader, SkColorFilter or SkBlender as a child + class ChildPtr { + public: + ChildPtr() = default; + ChildPtr(sk_sp s) : fChild(std::move(s)) {} + ChildPtr(sk_sp cf) : fChild(std::move(cf)) {} + ChildPtr(sk_sp b) : fChild(std::move(b)) {} + + // Asserts that the flattenable is either null, or one of the legal derived types + ChildPtr(sk_sp f); + + std::optional type() const; + + SkShader* shader() const; + SkColorFilter* colorFilter() const; + SkBlender* blender() const; + SkFlattenable* flattenable() const { return fChild.get(); } + + using sk_is_trivially_relocatable = std::true_type; + + private: + sk_sp fChild; + + static_assert(::sk_is_trivially_relocatable::value); + }; + + sk_sp makeShader(sk_sp uniforms, + sk_sp children[], + size_t childCount, + const SkMatrix* localMatrix = nullptr) const; + sk_sp makeShader(sk_sp uniforms, + SkSpan children, + const SkMatrix* localMatrix = nullptr) const; + + sk_sp makeImage(GrRecordingContext*, + sk_sp uniforms, + SkSpan children, + const SkMatrix* localMatrix, + SkImageInfo resultInfo, + bool mipmapped) const; + + sk_sp makeColorFilter(sk_sp uniforms) const; + sk_sp makeColorFilter(sk_sp uniforms, + sk_sp children[], + size_t childCount) const; + sk_sp makeColorFilter(sk_sp uniforms, + SkSpan children) const; + + sk_sp makeBlender(sk_sp uniforms, + SkSpan children = {}) const; + + /** + * Creates a new Runtime Effect patterned after an already-existing one. The new shader behaves + * like the original, but also creates a debug trace of its execution at the requested + * coordinate. After painting with this shader, the associated DebugTrace object will contain a + * shader execution trace. Call `writeTrace` on the debug trace object to generate a full trace + * suitable for a debugger, or call `dump` to emit a human-readable trace. + * + * Debug traces are only supported on a raster (non-GPU) canvas. + + * Debug traces are currently only supported on shaders. Color filter and blender tracing is a + * work-in-progress. + */ + struct TracedShader { + sk_sp shader; + sk_sp debugTrace; + }; + static TracedShader MakeTraced(sk_sp shader, const SkIPoint& traceCoord); + + // Returns the SkSL source of the runtime effect shader. + const std::string& source() const; + + // Combined size of all 'uniform' variables. When calling makeColorFilter or makeShader, + // provide an SkData of this size, containing values for all of those variables. + size_t uniformSize() const; + + SkSpan uniforms() const { return SkSpan(fUniforms); } + SkSpan children() const { return SkSpan(fChildren); } + + // Returns pointer to the named uniform variable's description, or nullptr if not found + const Uniform* findUniform(std::string_view name) const; + + // Returns pointer to the named child's description, or nullptr if not found + const Child* findChild(std::string_view name) const; + + // Allows the runtime effect type to be identified. + bool allowShader() const { return (fFlags & kAllowShader_Flag); } + bool allowColorFilter() const { return (fFlags & kAllowColorFilter_Flag); } + bool allowBlender() const { return (fFlags & kAllowBlender_Flag); } + + static void RegisterFlattenables(); + ~SkRuntimeEffect() override; + +private: + enum Flags { + kUsesSampleCoords_Flag = 0x01, + kAllowColorFilter_Flag = 0x02, + kAllowShader_Flag = 0x04, + kAllowBlender_Flag = 0x08, + kSamplesOutsideMain_Flag = 0x10, + kUsesColorTransform_Flag = 0x20, + kAlwaysOpaque_Flag = 0x40, + }; + + SkRuntimeEffect(std::unique_ptr baseProgram, + const Options& options, + const SkSL::FunctionDefinition& main, + std::vector&& uniforms, + std::vector&& children, + std::vector&& sampleUsages, + uint32_t flags); + + sk_sp makeUnoptimizedClone(); + + static Result MakeFromSource(SkString sksl, const Options& options, SkSL::ProgramKind kind); + + static Result MakeInternal(std::unique_ptr program, + const Options& options, + SkSL::ProgramKind kind); + + static SkSL::ProgramSettings MakeSettings(const Options& options); + + uint32_t hash() const { return fHash; } + bool usesSampleCoords() const { return (fFlags & kUsesSampleCoords_Flag); } + bool samplesOutsideMain() const { return (fFlags & kSamplesOutsideMain_Flag); } + bool usesColorTransform() const { return (fFlags & kUsesColorTransform_Flag); } + bool alwaysOpaque() const { return (fFlags & kAlwaysOpaque_Flag); } + + const SkFilterColorProgram* getFilterColorProgram() const; + const SkSL::RP::Program* getRPProgram() const; + +#if defined(SK_GANESH) + friend class GrSkSLFP; // fBaseProgram, fSampleUsages + friend class GrGLSLSkSLFP; // +#endif + + friend class SkRTShader; // fBaseProgram, fMain, fSampleUsages, getRPProgram() + friend class SkRuntimeBlender; // + friend class SkRuntimeColorFilter; // + + friend class SkFilterColorProgram; + friend class SkRuntimeEffectPriv; + + uint32_t fHash; + + std::unique_ptr fBaseProgram; + std::unique_ptr fRPProgram; + mutable SkOnce fCompileRPProgramOnce; + const SkSL::FunctionDefinition& fMain; + std::vector fUniforms; + std::vector fChildren; + std::vector fSampleUsages; + + std::unique_ptr fFilterColorProgram; + + uint32_t fFlags; // Flags +}; + +/** Base class for SkRuntimeShaderBuilder, defined below. */ +class SkRuntimeEffectBuilder { +public: + struct BuilderUniform { + // Copy 'val' to this variable. No type conversion is performed - 'val' must be same + // size as expected by the effect. Information about the variable can be queried by + // looking at fVar. If the size is incorrect, no copy will be performed, and debug + // builds will abort. If this is the result of querying a missing variable, fVar will + // be nullptr, and assigning will also do nothing (and abort in debug builds). + template + std::enable_if_t::value, BuilderUniform&> operator=( + const T& val) { + if (!fVar) { + SkDEBUGFAIL("Assigning to missing variable"); + } else if (sizeof(val) != fVar->sizeInBytes()) { + SkDEBUGFAIL("Incorrect value size"); + } else { + memcpy(SkTAddOffset(fOwner->writableUniformData(), fVar->offset), + &val, sizeof(val)); + } + return *this; + } + + BuilderUniform& operator=(const SkMatrix& val) { + if (!fVar) { + SkDEBUGFAIL("Assigning to missing variable"); + } else if (fVar->sizeInBytes() != 9 * sizeof(float)) { + SkDEBUGFAIL("Incorrect value size"); + } else { + float* data = SkTAddOffset(fOwner->writableUniformData(), + (ptrdiff_t)fVar->offset); + data[0] = val.get(0); data[1] = val.get(3); data[2] = val.get(6); + data[3] = val.get(1); data[4] = val.get(4); data[5] = val.get(7); + data[6] = val.get(2); data[7] = val.get(5); data[8] = val.get(8); + } + return *this; + } + + template + bool set(const T val[], const int count) { + static_assert(std::is_trivially_copyable::value, "Value must be trivial copyable"); + if (!fVar) { + SkDEBUGFAIL("Assigning to missing variable"); + return false; + } else if (sizeof(T) * count != fVar->sizeInBytes()) { + SkDEBUGFAIL("Incorrect value size"); + return false; + } else { + memcpy(SkTAddOffset(fOwner->writableUniformData(), fVar->offset), + val, sizeof(T) * count); + } + return true; + } + + SkRuntimeEffectBuilder* fOwner; + const SkRuntimeEffect::Uniform* fVar; // nullptr if the variable was not found + }; + + struct BuilderChild { + template BuilderChild& operator=(sk_sp val) { + if (!fChild) { + SkDEBUGFAIL("Assigning to missing child"); + } else { + fOwner->fChildren[(size_t)fChild->index] = std::move(val); + } + return *this; + } + + BuilderChild& operator=(std::nullptr_t) { + if (!fChild) { + SkDEBUGFAIL("Assigning to missing child"); + } else { + fOwner->fChildren[(size_t)fChild->index] = SkRuntimeEffect::ChildPtr{}; + } + return *this; + } + + SkRuntimeEffectBuilder* fOwner; + const SkRuntimeEffect::Child* fChild; // nullptr if the child was not found + }; + + const SkRuntimeEffect* effect() const { return fEffect.get(); } + + BuilderUniform uniform(std::string_view name) { return { this, fEffect->findUniform(name) }; } + BuilderChild child(std::string_view name) { return { this, fEffect->findChild(name) }; } + + // Get access to the collated uniforms and children (in the order expected by APIs like + // makeShader on the effect): + sk_sp uniforms() { return fUniforms; } + SkSpan children() { return fChildren; } + +protected: + SkRuntimeEffectBuilder() = delete; + explicit SkRuntimeEffectBuilder(sk_sp effect) + : fEffect(std::move(effect)) + , fUniforms(SkData::MakeZeroInitialized(fEffect->uniformSize())) + , fChildren(fEffect->children().size()) {} + explicit SkRuntimeEffectBuilder(sk_sp effect, sk_sp uniforms) + : fEffect(std::move(effect)) + , fUniforms(std::move(uniforms)) + , fChildren(fEffect->children().size()) {} + + SkRuntimeEffectBuilder(SkRuntimeEffectBuilder&&) = default; + SkRuntimeEffectBuilder(const SkRuntimeEffectBuilder&) = default; + + SkRuntimeEffectBuilder& operator=(SkRuntimeEffectBuilder&&) = delete; + SkRuntimeEffectBuilder& operator=(const SkRuntimeEffectBuilder&) = delete; + +private: + void* writableUniformData() { + if (!fUniforms->unique()) { + fUniforms = SkData::MakeWithCopy(fUniforms->data(), fUniforms->size()); + } + return fUniforms->writable_data(); + } + + sk_sp fEffect; + sk_sp fUniforms; + std::vector fChildren; +}; + +/** + * SkRuntimeShaderBuilder is a utility to simplify creating SkShader objects from SkRuntimeEffects. + * + * NOTE: Like SkRuntimeEffect, this API is experimental and subject to change! + * + * Given an SkRuntimeEffect, the SkRuntimeShaderBuilder manages creating an input data block and + * provides named access to the 'uniform' variables in that block, as well as named access + * to a list of child shader slots. Usage: + * + * sk_sp effect = ...; + * SkRuntimeShaderBuilder builder(effect); + * builder.uniform("some_uniform_float") = 3.14f; + * builder.uniform("some_uniform_matrix") = SkM44::Rotate(...); + * builder.child("some_child_effect") = mySkImage->makeShader(...); + * ... + * sk_sp shader = builder.makeShader(nullptr, false); + * + * Note that SkRuntimeShaderBuilder is built entirely on the public API of SkRuntimeEffect, + * so can be used as-is or serve as inspiration for other interfaces or binding techniques. + */ +class SK_API SkRuntimeShaderBuilder : public SkRuntimeEffectBuilder { +public: + explicit SkRuntimeShaderBuilder(sk_sp); + // This is currently required by Android Framework but may go away if that dependency + // can be removed. + SkRuntimeShaderBuilder(const SkRuntimeShaderBuilder&) = default; + ~SkRuntimeShaderBuilder(); + + sk_sp makeShader(const SkMatrix* localMatrix = nullptr); + sk_sp makeImage(GrRecordingContext*, + const SkMatrix* localMatrix, + SkImageInfo resultInfo, + bool mipmapped); + +private: + using INHERITED = SkRuntimeEffectBuilder; + + explicit SkRuntimeShaderBuilder(sk_sp effect, sk_sp uniforms) + : INHERITED(std::move(effect), std::move(uniforms)) {} + + friend class SkRuntimeImageFilter; +}; + +/** + * SkRuntimeColorFilterBuilder makes it easy to setup and assign uniforms to runtime color filters. + */ +class SK_API SkRuntimeColorFilterBuilder : public SkRuntimeEffectBuilder { +public: + explicit SkRuntimeColorFilterBuilder(sk_sp); + ~SkRuntimeColorFilterBuilder(); + + SkRuntimeColorFilterBuilder(const SkRuntimeColorFilterBuilder&) = delete; + SkRuntimeColorFilterBuilder& operator=(const SkRuntimeColorFilterBuilder&) = delete; + + sk_sp makeColorFilter(); + +private: + using INHERITED = SkRuntimeEffectBuilder; +}; + +/** + * SkRuntimeBlendBuilder is a utility to simplify creation and uniform setup of runtime blenders. + */ +class SK_API SkRuntimeBlendBuilder : public SkRuntimeEffectBuilder { +public: + explicit SkRuntimeBlendBuilder(sk_sp); + ~SkRuntimeBlendBuilder(); + + SkRuntimeBlendBuilder(const SkRuntimeBlendBuilder&) = delete; + SkRuntimeBlendBuilder& operator=(const SkRuntimeBlendBuilder&) = delete; + + sk_sp makeBlender(); + +private: + using INHERITED = SkRuntimeEffectBuilder; +}; + +#endif // SK_ENABLE_SKSL + +#endif // SkRuntimeEffect_DEFINED diff --git a/gfx/skia/skia/include/effects/SkShaderMaskFilter.h b/gfx/skia/skia/include/effects/SkShaderMaskFilter.h new file mode 100644 index 0000000000..84937967bf --- /dev/null +++ b/gfx/skia/skia/include/effects/SkShaderMaskFilter.h @@ -0,0 +1,26 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkShaderMaskFilter_DEFINED +#define SkShaderMaskFilter_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkMaskFilter; +class SkShader; + +class SK_API SkShaderMaskFilter { +public: + static sk_sp Make(sk_sp shader); + +private: + static void RegisterFlattenables(); + friend class SkFlattenable; +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkStrokeAndFillPathEffect.h b/gfx/skia/skia/include/effects/SkStrokeAndFillPathEffect.h new file mode 100644 index 0000000000..fbde649334 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkStrokeAndFillPathEffect.h @@ -0,0 +1,28 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStrokeAndFillPathEffect_DEFINED +#define SkStrokeAndFillPathEffect_DEFINED + +#include "include/core/SkPaint.h" +#include "include/core/SkPathEffect.h" +#include "include/pathops/SkPathOps.h" + +class SK_API SkStrokeAndFillPathEffect { +public: + /* If the paint is set to stroke, this will add the stroke and fill geometries + * together (hoping that the winding-direction works out). + * + * If the paint is set to fill, this effect is ignored. + * + * Note that if the paint is set to stroke and the stroke-width is 0, then + * this will turn the geometry into just a fill. + */ + static sk_sp Make(); +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkTableColorFilter.h b/gfx/skia/skia/include/effects/SkTableColorFilter.h new file mode 100644 index 0000000000..9a6ce3253e --- /dev/null +++ b/gfx/skia/skia/include/effects/SkTableColorFilter.h @@ -0,0 +1,29 @@ +/* +* Copyright 2015 Google Inc. +* +* Use of this source code is governed by a BSD-style license that can be +* found in the LICENSE file. +*/ + +#ifndef SkTableColorFilter_DEFINED +#define SkTableColorFilter_DEFINED + +#include "include/core/SkColorFilter.h" + +// (DEPRECATED) These factory functions are deprecated. Please use the ones in +// SkColorFilters (i.e., Table and TableARGB). +class SK_API SkTableColorFilter { +public: + static sk_sp Make(const uint8_t table[256]) { + return SkColorFilters::Table(table); + } + + static sk_sp MakeARGB(const uint8_t tableA[256], + const uint8_t tableR[256], + const uint8_t tableG[256], + const uint8_t tableB[256]) { + return SkColorFilters::TableARGB(tableA, tableR, tableG, tableB); + } +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkTableMaskFilter.h b/gfx/skia/skia/include/effects/SkTableMaskFilter.h new file mode 100644 index 0000000000..412f138353 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkTableMaskFilter.h @@ -0,0 +1,41 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTableMaskFilter_DEFINED +#define SkTableMaskFilter_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +#include + +class SkMaskFilter; + +/** \class SkTableMaskFilter + + Applies a table lookup on each of the alpha values in the mask. + Helper methods create some common tables (e.g. gamma, clipping) + */ +class SK_API SkTableMaskFilter { +public: + /** Utility that sets the gamma table + */ + static void MakeGammaTable(uint8_t table[256], SkScalar gamma); + + /** Utility that creates a clipping table: clamps values below min to 0 + and above max to 255, and rescales the remaining into 0..255 + */ + static void MakeClipTable(uint8_t table[256], uint8_t min, uint8_t max); + + static SkMaskFilter* Create(const uint8_t table[256]); + static SkMaskFilter* CreateGamma(SkScalar gamma); + static SkMaskFilter* CreateClip(uint8_t min, uint8_t max); + + SkTableMaskFilter() = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/effects/SkTrimPathEffect.h b/gfx/skia/skia/include/effects/SkTrimPathEffect.h new file mode 100644 index 0000000000..3e6fb7c342 --- /dev/null +++ b/gfx/skia/skia/include/effects/SkTrimPathEffect.h @@ -0,0 +1,45 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTrimPathEffect_DEFINED +#define SkTrimPathEffect_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +class SkPathEffect; + +class SK_API SkTrimPathEffect { +public: + enum class Mode { + kNormal, // return the subset path [start,stop] + kInverted, // return the complement/subset paths [0,start] + [stop,1] + }; + + /** + * Take start and stop "t" values (values between 0...1), and return a path that is that + * subset of the original path. + * + * e.g. + * Make(0.5, 1.0) --> return the 2nd half of the path + * Make(0.33333, 0.66667) --> return the middle third of the path + * + * The trim values apply to the entire path, so if it contains several contours, all of them + * are including in the calculation. + * + * startT and stopT must be 0..1 inclusive. If they are outside of that interval, they will + * be pinned to the nearest legal value. If either is NaN, null will be returned. + * + * Note: for Mode::kNormal, this will return one (logical) segment (even if it is spread + * across multiple contours). For Mode::kInverted, this will return 2 logical + * segments: stopT..1 and 0...startT, in this order. + */ + static sk_sp Make(SkScalar startT, SkScalar stopT, Mode = Mode::kNormal); +}; + +#endif diff --git a/gfx/skia/skia/include/encode/SkEncoder.h b/gfx/skia/skia/include/encode/SkEncoder.h new file mode 100644 index 0000000000..8f76e8016c --- /dev/null +++ b/gfx/skia/skia/include/encode/SkEncoder.h @@ -0,0 +1,63 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEncoder_DEFINED +#define SkEncoder_DEFINED + +#include "include/core/SkPixmap.h" +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTemplates.h" + +#include +#include + +class SK_API SkEncoder : SkNoncopyable { +public: + /** + * A single frame to be encoded into an animated image. + * + * If a frame does not fit in the canvas size, this is an error. + * TODO(skia:13705): Add offsets when we have support for an encoder that supports using + * offsets. + */ + struct SK_API Frame { + /** + * Pixmap of the frame. + */ + SkPixmap pixmap; + /** + * Duration of the frame in millseconds. + */ + int duration; + }; + + /** + * Encode |numRows| rows of input. If the caller requests more rows than are remaining + * in the src, this will encode all of the remaining rows. |numRows| must be greater + * than zero. + */ + bool encodeRows(int numRows); + + virtual ~SkEncoder() {} + +protected: + + virtual bool onEncodeRows(int numRows) = 0; + + SkEncoder(const SkPixmap& src, size_t storageBytes) + : fSrc(src) + , fCurrRow(0) + , fStorage(storageBytes) + {} + + const SkPixmap& fSrc; + int fCurrRow; + skia_private::AutoTMalloc fStorage; +}; + +#endif diff --git a/gfx/skia/skia/include/encode/SkICC.h b/gfx/skia/skia/include/encode/SkICC.h new file mode 100644 index 0000000000..b14836b2ab --- /dev/null +++ b/gfx/skia/skia/include/encode/SkICC.h @@ -0,0 +1,36 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkICC_DEFINED +#define SkICC_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkAPI.h" + +#include + +class SkData; +struct skcms_ICCProfile; +struct skcms_Matrix3x3; +struct skcms_TransferFunction; + +SK_API sk_sp SkWriteICCProfile(const skcms_TransferFunction&, + const skcms_Matrix3x3& toXYZD50); + +SK_API sk_sp SkWriteICCProfile(const skcms_ICCProfile*, const char* description); + +// Utility function for populating the grid_16 member of skcms_A2B and skcms_B2A +// structures. This converts a point in XYZD50 to its representation in grid_16_lab. +// It will write 6 bytes. The behavior of this function matches how skcms will decode +// values, but might not match the specification, see https://crbug.com/skia/13807. +SK_API void SkICCFloatXYZD50ToGrid16Lab(const float* float_xyz, uint8_t* grid16_lab); + +// Utility function for popluating the table_16 member of skcms_Curve structure. +// This converts a float to its representation in table_16. It will write 2 bytes. +SK_API void SkICCFloatToTable16(const float f, uint8_t* table_16); + +#endif//SkICC_DEFINED diff --git a/gfx/skia/skia/include/encode/SkJpegEncoder.h b/gfx/skia/skia/include/encode/SkJpegEncoder.h new file mode 100644 index 0000000000..0e036501d2 --- /dev/null +++ b/gfx/skia/skia/include/encode/SkJpegEncoder.h @@ -0,0 +1,137 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkJpegEncoder_DEFINED +#define SkJpegEncoder_DEFINED + +#include "include/encode/SkEncoder.h" +#include "include/private/base/SkAPI.h" + +#include + +class SkColorSpace; +class SkData; +class SkJpegEncoderMgr; +class SkPixmap; +class SkWStream; +class SkYUVAPixmaps; +struct skcms_ICCProfile; + +class SK_API SkJpegEncoder : public SkEncoder { +public: + + enum class AlphaOption { + kIgnore, + kBlendOnBlack, + }; + + enum class Downsample { + /** + * Reduction by a factor of two in both the horizontal and vertical directions. + */ + k420, + + /** + * Reduction by a factor of two in the horizontal direction. + */ + k422, + + /** + * No downsampling. + */ + k444, + }; + + struct Options { + /** + * |fQuality| must be in [0, 100] where 0 corresponds to the lowest quality. + */ + int fQuality = 100; + + /** + * Choose the downsampling factor for the U and V components. This is only + * meaningful if the |src| is not kGray, since kGray will not be encoded as YUV. + * This is ignored in favor of |src|'s subsampling when |src| is an SkYUVAPixmaps. + * + * Our default value matches the libjpeg-turbo default. + */ + Downsample fDownsample = Downsample::k420; + + /** + * Jpegs must be opaque. This instructs the encoder on how to handle input + * images with alpha. + * + * The default is to ignore the alpha channel and treat the image as opaque. + * Another option is to blend the pixels onto a black background before encoding. + * In the second case, the encoder supports linear or legacy blending. + */ + AlphaOption fAlphaOption = AlphaOption::kIgnore; + + /** + * Optional XMP metadata. + */ + const SkData* xmpMetadata = nullptr; + + /** + * An optional ICC profile to override the default behavior. + * + * The default behavior is to generate an ICC profile using a primary matrix and + * analytic transfer function. If the color space of |src| cannot be represented + * in this way (e.g, it is HLG or PQ), then no profile will be embedded. + */ + const skcms_ICCProfile* fICCProfile = nullptr; + const char* fICCProfileDescription = nullptr; + }; + + /** + * Encode the |src| pixels to the |dst| stream. + * |options| may be used to control the encoding behavior. + * + * Returns true on success. Returns false on an invalid or unsupported |src|. + */ + static bool Encode(SkWStream* dst, const SkPixmap& src, const Options& options); + static bool Encode(SkWStream* dst, + const SkYUVAPixmaps& src, + const SkColorSpace* srcColorSpace, + const Options& options); + + /** + * Create a jpeg encoder that will encode the |src| pixels to the |dst| stream. + * |options| may be used to control the encoding behavior. + * + * |dst| is unowned but must remain valid for the lifetime of the object. + * + * This returns nullptr on an invalid or unsupported |src|. + */ + static std::unique_ptr Make(SkWStream* dst, const SkPixmap& src, + const Options& options); + static std::unique_ptr Make(SkWStream* dst, + const SkYUVAPixmaps& src, + const SkColorSpace* srcColorSpace, + const Options& options); + + ~SkJpegEncoder() override; + +protected: + bool onEncodeRows(int numRows) override; + +private: + SkJpegEncoder(std::unique_ptr, const SkPixmap& src); + SkJpegEncoder(std::unique_ptr, const SkYUVAPixmaps* srcYUVA); + + static std::unique_ptr Make(SkWStream* dst, + const SkPixmap* src, + const SkYUVAPixmaps* srcYUVA, + const SkColorSpace* srcYUVAColorSpace, + const Options& options); + + std::unique_ptr fEncoderMgr; + const SkYUVAPixmaps* fSrcYUVA = nullptr; + using INHERITED = SkEncoder; +}; + +#endif diff --git a/gfx/skia/skia/include/encode/SkPngEncoder.h b/gfx/skia/skia/include/encode/SkPngEncoder.h new file mode 100644 index 0000000000..cc7aa50b81 --- /dev/null +++ b/gfx/skia/skia/include/encode/SkPngEncoder.h @@ -0,0 +1,115 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPngEncoder_DEFINED +#define SkPngEncoder_DEFINED + +#include "include/core/SkDataTable.h" +#include "include/core/SkRefCnt.h" +#include "include/encode/SkEncoder.h" +#include "include/private/base/SkAPI.h" + +#include + +class SkPixmap; +class SkPngEncoderMgr; +class SkWStream; +struct skcms_ICCProfile; + +class SK_API SkPngEncoder : public SkEncoder { +public: + + enum class FilterFlag : int { + kZero = 0x00, + kNone = 0x08, + kSub = 0x10, + kUp = 0x20, + kAvg = 0x40, + kPaeth = 0x80, + kAll = kNone | kSub | kUp | kAvg | kPaeth, + }; + + struct Options { + /** + * Selects which filtering strategies to use. + * + * If a single filter is chosen, libpng will use that filter for every row. + * + * If multiple filters are chosen, libpng will use a heuristic to guess which filter + * will encode smallest, then apply that filter. This happens on a per row basis, + * different rows can use different filters. + * + * Using a single filter (or less filters) is typically faster. Trying all of the + * filters may help minimize the output file size. + * + * Our default value matches libpng's default. + */ + FilterFlag fFilterFlags = FilterFlag::kAll; + + /** + * Must be in [0, 9] where 9 corresponds to maximal compression. This value is passed + * directly to zlib. 0 is a special case to skip zlib entirely, creating dramatically + * larger pngs. + * + * Our default value matches libpng's default. + */ + int fZLibLevel = 6; + + /** + * Represents comments in the tEXt ancillary chunk of the png. + * The 2i-th entry is the keyword for the i-th comment, + * and the (2i + 1)-th entry is the text for the i-th comment. + */ + sk_sp fComments; + + /** + * An optional ICC profile to override the default behavior. + * + * The default behavior is to generate an ICC profile using a primary matrix and + * analytic transfer function. If the color space of |src| cannot be represented + * in this way (e.g, it is HLG or PQ), then no profile will be embedded. + */ + const skcms_ICCProfile* fICCProfile = nullptr; + const char* fICCProfileDescription = nullptr; + }; + + /** + * Encode the |src| pixels to the |dst| stream. + * |options| may be used to control the encoding behavior. + * + * Returns true on success. Returns false on an invalid or unsupported |src|. + */ + static bool Encode(SkWStream* dst, const SkPixmap& src, const Options& options); + + /** + * Create a png encoder that will encode the |src| pixels to the |dst| stream. + * |options| may be used to control the encoding behavior. + * + * |dst| is unowned but must remain valid for the lifetime of the object. + * + * This returns nullptr on an invalid or unsupported |src|. + */ + static std::unique_ptr Make(SkWStream* dst, const SkPixmap& src, + const Options& options); + + ~SkPngEncoder() override; + +protected: + bool onEncodeRows(int numRows) override; + + SkPngEncoder(std::unique_ptr, const SkPixmap& src); + + std::unique_ptr fEncoderMgr; + using INHERITED = SkEncoder; +}; + +static inline SkPngEncoder::FilterFlag operator|(SkPngEncoder::FilterFlag x, + SkPngEncoder::FilterFlag y) { + return (SkPngEncoder::FilterFlag)((int)x | (int)y); +} + +#endif diff --git a/gfx/skia/skia/include/encode/SkWebpEncoder.h b/gfx/skia/skia/include/encode/SkWebpEncoder.h new file mode 100644 index 0000000000..fe55a607dd --- /dev/null +++ b/gfx/skia/skia/include/encode/SkWebpEncoder.h @@ -0,0 +1,78 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkWebpEncoder_DEFINED +#define SkWebpEncoder_DEFINED + +#include "include/core/SkSpan.h" // IWYU pragma: keep +#include "include/encode/SkEncoder.h" +#include "include/private/base/SkAPI.h" + +class SkPixmap; +class SkWStream; +struct skcms_ICCProfile; + +namespace SkWebpEncoder { + + enum class Compression { + kLossy, + kLossless, + }; + + struct SK_API Options { + /** + * |fCompression| determines whether we will use webp lossy or lossless compression. + * + * |fQuality| must be in [0.0f, 100.0f]. + * If |fCompression| is kLossy, |fQuality| corresponds to the visual quality of the + * encoding. Decreasing the quality will result in a smaller encoded image. + * If |fCompression| is kLossless, |fQuality| corresponds to the amount of effort + * put into the encoding. Lower values will compress faster into larger files, + * while larger values will compress slower into smaller files. + * + * This scheme is designed to match the libwebp API. + */ + Compression fCompression = Compression::kLossy; + float fQuality = 100.0f; + + /** + * An optional ICC profile to override the default behavior. + * + * The default behavior is to generate an ICC profile using a primary matrix and + * analytic transfer function. If the color space of |src| cannot be represented + * in this way (e.g, it is HLG or PQ), then no profile will be embedded. + */ + const skcms_ICCProfile* fICCProfile = nullptr; + const char* fICCProfileDescription = nullptr; + }; + + /** + * Encode the |src| pixels to the |dst| stream. + * |options| may be used to control the encoding behavior. + * + * Returns true on success. Returns false on an invalid or unsupported |src|. + */ + SK_API bool Encode(SkWStream* dst, const SkPixmap& src, const Options& options); + + /** + * Encode the |src| frames to the |dst| stream. + * |options| may be used to control the encoding behavior. + * + * The size of the first frame will be used as the canvas size. If any other frame does + * not match the canvas size, this is an error. + * + * Returns true on success. Returns false on an invalid or unsupported |src|. + * + * Note: libwebp API also supports set background color, loop limit and customize + * lossy/lossless for each frame. These could be added later as needed. + */ + SK_API bool EncodeAnimated(SkWStream* dst, + SkSpan src, + const Options& options); +} // namespace SkWebpEncoder + +#endif diff --git a/gfx/skia/skia/include/gpu/GpuTypes.h b/gfx/skia/skia/include/gpu/GpuTypes.h new file mode 100644 index 0000000000..e2e3961f8b --- /dev/null +++ b/gfx/skia/skia/include/gpu/GpuTypes.h @@ -0,0 +1,72 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_GpuTypes_DEFINED +#define skgpu_GpuTypes_DEFINED + +#include "include/core/SkTypes.h" + +/** + * This file includes numerous public types that are used by all of our gpu backends. + */ + +namespace skgpu { + +/** + * Possible 3D APIs that may be used by Graphite. + */ +enum class BackendApi : unsigned { + kDawn, + kMetal, + kVulkan, + kMock, +}; + +/** Indicates whether an allocation should count against a cache budget. */ +enum class Budgeted : bool { + kNo = false, + kYes = true, +}; + +/** + * Value passed into various callbacks to tell the client the result of operations connected to a + * specific callback. The actual interpretation of kFailed and kSuccess are dependent on the + * specific callbacks and are documented with the callback itself. + */ +enum class CallbackResult : bool { + kFailed = false, + kSuccess = true, +}; + +/** + * Is the texture mipmapped or not + */ +enum class Mipmapped : bool { + kNo = false, + kYes = true, +}; + +/** + * Is the data protected on the GPU or not. + */ +enum class Protected : bool { + kNo = false, + kYes = true, +}; + +/** + * Is a texture renderable or not + */ +enum class Renderable : bool { + kNo = false, + kYes = true, +}; + +} // namespace skgpu + + +#endif // skgpu_GpuTypes_DEFINED diff --git a/gfx/skia/skia/include/gpu/GrBackendDrawableInfo.h b/gfx/skia/skia/include/gpu/GrBackendDrawableInfo.h new file mode 100644 index 0000000000..bda1e769fd --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrBackendDrawableInfo.h @@ -0,0 +1,44 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrBackendDrawableInfo_DEFINED +#define GrBackendDrawableInfo_DEFINED + +#include "include/gpu/GrTypes.h" + +#include "include/gpu/vk/GrVkTypes.h" + +class SK_API GrBackendDrawableInfo { +public: + // Creates an invalid backend drawable info. + GrBackendDrawableInfo() : fIsValid(false) {} + + GrBackendDrawableInfo(const GrVkDrawableInfo& info) + : fIsValid(true) + , fBackend(GrBackendApi::kVulkan) + , fVkInfo(info) {} + + // Returns true if the backend texture has been initialized. + bool isValid() const { return fIsValid; } + + GrBackendApi backend() const { return fBackend; } + + bool getVkDrawableInfo(GrVkDrawableInfo* outInfo) const { + if (this->isValid() && GrBackendApi::kVulkan == fBackend) { + *outInfo = fVkInfo; + return true; + } + return false; + } + +private: + bool fIsValid; + GrBackendApi fBackend; + GrVkDrawableInfo fVkInfo; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/GrBackendSemaphore.h b/gfx/skia/skia/include/gpu/GrBackendSemaphore.h new file mode 100644 index 0000000000..13d07928e7 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrBackendSemaphore.h @@ -0,0 +1,140 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrBackendSemaphore_DEFINED +#define GrBackendSemaphore_DEFINED + +#include "include/gpu/GrTypes.h" + +#include "include/gpu/gl/GrGLTypes.h" + +#ifdef SK_METAL +#include "include/gpu/mtl/GrMtlTypes.h" +#endif + +#ifdef SK_VULKAN +#include "include/gpu/vk/GrVkTypes.h" +#endif + +#ifdef SK_DIRECT3D +#include "include/private/gpu/ganesh/GrD3DTypesMinimal.h" +#endif + +/** + * Wrapper class for passing into and receiving data from Ganesh about a backend semaphore object. + */ +class GrBackendSemaphore { +public: + // For convenience we just set the backend here to OpenGL. The GrBackendSemaphore cannot be used + // until either init* is called, which will set the appropriate GrBackend. + GrBackendSemaphore() + : fBackend(GrBackendApi::kOpenGL), fGLSync(nullptr), fIsInitialized(false) {} + +#ifdef SK_DIRECT3D + // We only need to specify these if Direct3D is enabled, because it requires special copy + // characteristics. + ~GrBackendSemaphore(); + GrBackendSemaphore(const GrBackendSemaphore&); + GrBackendSemaphore& operator=(const GrBackendSemaphore&); +#endif + + void initGL(GrGLsync sync) { + fBackend = GrBackendApi::kOpenGL; + fGLSync = sync; + fIsInitialized = true; + } + +#ifdef SK_VULKAN + void initVulkan(VkSemaphore semaphore) { + fBackend = GrBackendApi::kVulkan; + fVkSemaphore = semaphore; + + fIsInitialized = true; + } + + VkSemaphore vkSemaphore() const { + if (!fIsInitialized || GrBackendApi::kVulkan != fBackend) { + return VK_NULL_HANDLE; + } + return fVkSemaphore; + } +#endif + +#ifdef SK_METAL + // It is the creator's responsibility to ref the MTLEvent passed in here, via __bridge_retained. + // The other end will wrap this BackendSemaphore and take the ref, via __bridge_transfer. + void initMetal(GrMTLHandle event, uint64_t value) { + fBackend = GrBackendApi::kMetal; + fMtlEvent = event; + fMtlValue = value; + + fIsInitialized = true; + } + + GrMTLHandle mtlSemaphore() const { + if (!fIsInitialized || GrBackendApi::kMetal != fBackend) { + return nullptr; + } + return fMtlEvent; + } + + uint64_t mtlValue() const { + if (!fIsInitialized || GrBackendApi::kMetal != fBackend) { + return 0; + } + return fMtlValue; + } + +#endif + +#ifdef SK_DIRECT3D + void initDirect3D(const GrD3DFenceInfo& info) { + fBackend = GrBackendApi::kDirect3D; + this->assignD3DFenceInfo(info); + fIsInitialized = true; + } +#endif + + bool isInitialized() const { return fIsInitialized; } + + GrGLsync glSync() const { + if (!fIsInitialized || GrBackendApi::kOpenGL != fBackend) { + return nullptr; + } + return fGLSync; + } + + +#ifdef SK_DIRECT3D + bool getD3DFenceInfo(GrD3DFenceInfo* outInfo) const; +#endif + +private: +#ifdef SK_DIRECT3D + void assignD3DFenceInfo(const GrD3DFenceInfo& info); +#endif + + GrBackendApi fBackend; + union { + GrGLsync fGLSync; +#ifdef SK_VULKAN + VkSemaphore fVkSemaphore; +#endif +#ifdef SK_METAL + GrMTLHandle fMtlEvent; // Expected to be an id +#endif +#ifdef SK_DIRECT3D + GrD3DFenceInfo* fD3DFenceInfo; +#endif + }; +#ifdef SK_METAL + uint64_t fMtlValue; +#endif + bool fIsInitialized; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/GrBackendSurface.h b/gfx/skia/skia/include/gpu/GrBackendSurface.h new file mode 100644 index 0000000000..e196cb9272 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrBackendSurface.h @@ -0,0 +1,666 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrBackendSurface_DEFINED +#define GrBackendSurface_DEFINED + +// This include of GrBackendSurfaceMutableState is not needed here, but some clients were depending +// on the include here instead of including it themselves. Adding this back here until we can fix +// up clients so it can be removed. +#include "include/gpu/GrBackendSurfaceMutableState.h" + +#include "include/gpu/GrSurfaceInfo.h" +#include "include/gpu/GrTypes.h" +#include "include/gpu/MutableTextureState.h" +#ifdef SK_GL +#include "include/gpu/gl/GrGLTypes.h" +#include "include/private/gpu/ganesh/GrGLTypesPriv.h" +#endif +#include "include/gpu/mock/GrMockTypes.h" +#ifdef SK_VULKAN +#include "include/gpu/vk/GrVkTypes.h" +#include "include/private/gpu/ganesh/GrVkTypesPriv.h" +#endif + +#ifdef SK_DAWN +#include "include/gpu/dawn/GrDawnTypes.h" +#endif + +#include + +class GrVkImageLayout; +class GrGLTextureParameters; +class GrColorFormatDesc; +enum class SkTextureCompressionType; + +namespace skgpu { +class MutableTextureStateRef; +} + +#ifdef SK_DAWN +#include "webgpu/webgpu_cpp.h" +#endif + +#ifdef SK_METAL +#include "include/gpu/mtl/GrMtlTypes.h" +#endif + +#ifdef SK_DIRECT3D +#include "include/private/gpu/ganesh/GrD3DTypesMinimal.h" +class GrD3DResourceState; +#endif + +#if defined(SK_DEBUG) || GR_TEST_UTILS +class SkString; +#endif + +#if !defined(SK_GANESH) + +// SkSurfaceCharacterization always needs a minimal version of this +class SK_API GrBackendFormat { +public: + bool isValid() const { return false; } +}; + +// SkSurface and SkImage rely on a minimal version of these always being available +class SK_API GrBackendTexture { +public: + GrBackendTexture() {} + + bool isValid() const { return false; } +}; + +class SK_API GrBackendRenderTarget { +public: + GrBackendRenderTarget() {} + + bool isValid() const { return false; } + bool isFramebufferOnly() const { return false; } +}; +#else + +enum class GrGLFormat; + +class SK_API GrBackendFormat { +public: + // Creates an invalid backend format. + GrBackendFormat() {} + GrBackendFormat(const GrBackendFormat&); + GrBackendFormat& operator=(const GrBackendFormat&); + +#ifdef SK_GL + static GrBackendFormat MakeGL(GrGLenum format, GrGLenum target) { + return GrBackendFormat(format, target); + } +#endif + +#ifdef SK_VULKAN + static GrBackendFormat MakeVk(VkFormat format, bool willUseDRMFormatModifiers = false) { + return GrBackendFormat(format, GrVkYcbcrConversionInfo(), willUseDRMFormatModifiers); + } + + static GrBackendFormat MakeVk(const GrVkYcbcrConversionInfo& ycbcrInfo, + bool willUseDRMFormatModifiers = false); +#endif + +#ifdef SK_DAWN + static GrBackendFormat MakeDawn(wgpu::TextureFormat format) { + return GrBackendFormat(format); + } +#endif + +#ifdef SK_METAL + static GrBackendFormat MakeMtl(GrMTLPixelFormat format) { + return GrBackendFormat(format); + } +#endif + +#ifdef SK_DIRECT3D + static GrBackendFormat MakeDxgi(DXGI_FORMAT format) { + return GrBackendFormat(format); + } +#endif + + static GrBackendFormat MakeMock(GrColorType colorType, SkTextureCompressionType compression, + bool isStencilFormat = false); + + bool operator==(const GrBackendFormat& that) const; + bool operator!=(const GrBackendFormat& that) const { return !(*this == that); } + + GrBackendApi backend() const { return fBackend; } + GrTextureType textureType() const { return fTextureType; } + + /** + * Gets the channels present in the format as a bitfield of SkColorChannelFlag values. + * Luminance channels are reported as kGray_SkColorChannelFlag. + */ + uint32_t channelMask() const; + + GrColorFormatDesc desc() const; + +#ifdef SK_GL + /** + * If the backend API is GL this gets the format as a GrGLFormat. Otherwise, returns + * GrGLFormat::kUnknown. + */ + GrGLFormat asGLFormat() const; + + GrGLenum asGLFormatEnum() const; +#endif + +#ifdef SK_VULKAN + /** + * If the backend API is Vulkan this gets the format as a VkFormat and returns true. Otherwise, + * returns false. + */ + bool asVkFormat(VkFormat*) const; + + const GrVkYcbcrConversionInfo* getVkYcbcrConversionInfo() const; +#endif + +#ifdef SK_DAWN + /** + * If the backend API is Dawn this gets the format as a wgpu::TextureFormat and returns true. + * Otherwise, returns false. + */ + bool asDawnFormat(wgpu::TextureFormat*) const; +#endif + +#ifdef SK_METAL + /** + * If the backend API is Metal this gets the format as a GrMtlPixelFormat. Otherwise, + * Otherwise, returns MTLPixelFormatInvalid. + */ + GrMTLPixelFormat asMtlFormat() const; +#endif + +#ifdef SK_DIRECT3D + /** + * If the backend API is Direct3D this gets the format as a DXGI_FORMAT and returns true. + * Otherwise, returns false. + */ + bool asDxgiFormat(DXGI_FORMAT*) const; +#endif + + /** + * If the backend API is not Mock these three calls will return kUnknown, kNone or false, + * respectively. Otherwise, only one of the following can be true. The GrColorType is not + * kUnknown, the compression type is not kNone, or this is a mock stencil format. + */ + GrColorType asMockColorType() const; + SkTextureCompressionType asMockCompressionType() const; + bool isMockStencilFormat() const; + + // If possible, copies the GrBackendFormat and forces the texture type to be Texture2D. If the + // GrBackendFormat was for Vulkan and it originally had a GrVkYcbcrConversionInfo, we will + // remove the conversion and set the format to be VK_FORMAT_R8G8B8A8_UNORM. + GrBackendFormat makeTexture2D() const; + + // Returns true if the backend format has been initialized. + bool isValid() const { return fValid; } + +#if defined(SK_DEBUG) || GR_TEST_UTILS + SkString toStr() const; +#endif + +private: +#ifdef SK_GL + GrBackendFormat(GrGLenum format, GrGLenum target); +#endif + +#ifdef SK_VULKAN + GrBackendFormat(const VkFormat vkFormat, const GrVkYcbcrConversionInfo&, + bool willUseDRMFormatModifiers); +#endif + +#ifdef SK_DAWN + GrBackendFormat(wgpu::TextureFormat format); +#endif + +#ifdef SK_METAL + GrBackendFormat(const GrMTLPixelFormat mtlFormat); +#endif + +#ifdef SK_DIRECT3D + GrBackendFormat(DXGI_FORMAT dxgiFormat); +#endif + + GrBackendFormat(GrColorType, SkTextureCompressionType, bool isStencilFormat); + +#ifdef SK_DEBUG + bool validateMock() const; +#endif + + GrBackendApi fBackend = GrBackendApi::kMock; + bool fValid = false; + + union { +#ifdef SK_GL + GrGLenum fGLFormat; // the sized, internal format of the GL resource +#endif +#ifdef SK_VULKAN + struct { + VkFormat fFormat; + GrVkYcbcrConversionInfo fYcbcrConversionInfo; + } fVk; +#endif +#ifdef SK_DAWN + wgpu::TextureFormat fDawnFormat; +#endif + +#ifdef SK_METAL + GrMTLPixelFormat fMtlFormat; +#endif + +#ifdef SK_DIRECT3D + DXGI_FORMAT fDxgiFormat; +#endif + struct { + GrColorType fColorType; + SkTextureCompressionType fCompressionType; + bool fIsStencilFormat; + } fMock; + }; + GrTextureType fTextureType = GrTextureType::kNone; +}; + +class SK_API GrBackendTexture { +public: + // Creates an invalid backend texture. + GrBackendTexture(); + +#ifdef SK_GL + // The GrGLTextureInfo must have a valid fFormat. + GrBackendTexture(int width, + int height, + GrMipmapped, + const GrGLTextureInfo& glInfo, + std::string_view label = {}); +#endif + +#ifdef SK_VULKAN + GrBackendTexture(int width, + int height, + const GrVkImageInfo& vkInfo, + std::string_view label = {}); +#endif + +#ifdef SK_METAL + GrBackendTexture(int width, + int height, + GrMipmapped, + const GrMtlTextureInfo& mtlInfo, + std::string_view label = {}); +#endif + +#ifdef SK_DIRECT3D + GrBackendTexture(int width, + int height, + const GrD3DTextureResourceInfo& d3dInfo, + std::string_view label = {}); +#endif + +#ifdef SK_DAWN + GrBackendTexture(int width, + int height, + const GrDawnTextureInfo& dawnInfo, + std::string_view label = {}); +#endif + + GrBackendTexture(int width, + int height, + GrMipmapped, + const GrMockTextureInfo& mockInfo, + std::string_view label = {}); + + GrBackendTexture(const GrBackendTexture& that); + + ~GrBackendTexture(); + + GrBackendTexture& operator=(const GrBackendTexture& that); + + SkISize dimensions() const { return {fWidth, fHeight}; } + int width() const { return fWidth; } + int height() const { return fHeight; } + std::string_view getLabel() const { return fLabel; } + GrMipmapped mipmapped() const { return fMipmapped; } + bool hasMipmaps() const { return fMipmapped == GrMipmapped::kYes; } + /** deprecated alias of hasMipmaps(). */ + bool hasMipMaps() const { return this->hasMipmaps(); } + GrBackendApi backend() const {return fBackend; } + GrTextureType textureType() const { return fTextureType; } + +#ifdef SK_GL + // If the backend API is GL, copies a snapshot of the GrGLTextureInfo struct into the passed in + // pointer and returns true. Otherwise returns false if the backend API is not GL. + bool getGLTextureInfo(GrGLTextureInfo*) const; + + // Call this to indicate that the texture parameters have been modified in the GL context + // externally to GrContext. + void glTextureParametersModified(); +#endif + +#ifdef SK_DAWN + // If the backend API is Dawn, copies a snapshot of the GrDawnTextureInfo struct into the passed + // in pointer and returns true. Otherwise returns false if the backend API is not Dawn. + bool getDawnTextureInfo(GrDawnTextureInfo*) const; +#endif + +#ifdef SK_VULKAN + // If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed + // in pointer and returns true. This snapshot will set the fImageLayout to the current layout + // state. Otherwise returns false if the backend API is not Vulkan. + bool getVkImageInfo(GrVkImageInfo*) const; + + // Anytime the client changes the VkImageLayout of the VkImage captured by this + // GrBackendTexture, they must call this function to notify Skia of the changed layout. + void setVkImageLayout(VkImageLayout); +#endif + +#ifdef SK_METAL + // If the backend API is Metal, copies a snapshot of the GrMtlTextureInfo struct into the passed + // in pointer and returns true. Otherwise returns false if the backend API is not Metal. + bool getMtlTextureInfo(GrMtlTextureInfo*) const; +#endif + +#ifdef SK_DIRECT3D + // If the backend API is Direct3D, copies a snapshot of the GrD3DTextureResourceInfo struct into + // the passed in pointer and returns true. This snapshot will set the fResourceState to the + // current resource state. Otherwise returns false if the backend API is not D3D. + bool getD3DTextureResourceInfo(GrD3DTextureResourceInfo*) const; + + // Anytime the client changes the D3D12_RESOURCE_STATES of the D3D12_RESOURCE captured by this + // GrBackendTexture, they must call this function to notify Skia of the changed layout. + void setD3DResourceState(GrD3DResourceStateEnum); +#endif + + // Get the GrBackendFormat for this texture (or an invalid format if this is not valid). + GrBackendFormat getBackendFormat() const; + + // If the backend API is Mock, copies a snapshot of the GrMockTextureInfo struct into the passed + // in pointer and returns true. Otherwise returns false if the backend API is not Mock. + bool getMockTextureInfo(GrMockTextureInfo*) const; + + // If the client changes any of the mutable backend of the GrBackendTexture they should call + // this function to inform Skia that those values have changed. The backend API specific state + // that can be set from this function are: + // + // Vulkan: VkImageLayout and QueueFamilyIndex + void setMutableState(const skgpu::MutableTextureState&); + + // Returns true if we are working with protected content. + bool isProtected() const; + + // Returns true if the backend texture has been initialized. + bool isValid() const { return fIsValid; } + + // Returns true if both textures are valid and refer to the same API texture. + bool isSameTexture(const GrBackendTexture&); + +#if GR_TEST_UTILS + static bool TestingOnly_Equals(const GrBackendTexture& , const GrBackendTexture&); +#endif + +private: + friend class GrVkGpu; // for getMutableState + sk_sp getMutableState() const; + +#ifdef SK_GL + friend class GrGLTexture; + friend class GrGLGpu; // for getGLTextureParams + GrBackendTexture(int width, + int height, + GrMipmapped, + const GrGLTextureInfo, + sk_sp, + std::string_view label = {}); + sk_sp getGLTextureParams() const; +#endif + +#ifdef SK_VULKAN + friend class GrVkTexture; + GrBackendTexture(int width, + int height, + const GrVkImageInfo& vkInfo, + sk_sp mutableState, + std::string_view label = {}); +#endif + +#ifdef SK_DIRECT3D + friend class GrD3DTexture; + friend class GrD3DGpu; // for getGrD3DResourceState + GrBackendTexture(int width, + int height, + const GrD3DTextureResourceInfo& vkInfo, + sk_sp state, + std::string_view label = {}); + sk_sp getGrD3DResourceState() const; +#endif + + // Free and release and resources being held by the GrBackendTexture. + void cleanup(); + + bool fIsValid; + int fWidth; // fMutableState; +}; + +class SK_API GrBackendRenderTarget { +public: + // Creates an invalid backend texture. + GrBackendRenderTarget(); + +#ifdef SK_GL + // The GrGLTextureInfo must have a valid fFormat. If wrapping in an SkSurface we require the + // stencil bits to be either 0, 8 or 16. + GrBackendRenderTarget(int width, + int height, + int sampleCnt, + int stencilBits, + const GrGLFramebufferInfo& glInfo); +#endif + +#ifdef SK_DAWN + // If wrapping in an SkSurface we require the stencil bits to be either 0, 8 or 16. + GrBackendRenderTarget(int width, + int height, + int sampleCnt, + int stencilBits, + const GrDawnRenderTargetInfo& dawnInfo); +#endif + +#ifdef SK_VULKAN + /** Deprecated. Sample count is now part of GrVkImageInfo. */ + GrBackendRenderTarget(int width, int height, int sampleCnt, const GrVkImageInfo& vkInfo); + + GrBackendRenderTarget(int width, int height, const GrVkImageInfo& vkInfo); +#endif + +#ifdef SK_METAL + GrBackendRenderTarget(int width, + int height, + const GrMtlTextureInfo& mtlInfo); + /** Deprecated. Sample count is ignored and is instead retrieved from the MtlTexture. */ + GrBackendRenderTarget(int width, + int height, + int sampleCnt, + const GrMtlTextureInfo& mtlInfo); +#endif + +#ifdef SK_DIRECT3D + GrBackendRenderTarget(int width, + int height, + const GrD3DTextureResourceInfo& d3dInfo); +#endif + + GrBackendRenderTarget(int width, + int height, + int sampleCnt, + int stencilBits, + const GrMockRenderTargetInfo& mockInfo); + + ~GrBackendRenderTarget(); + + GrBackendRenderTarget(const GrBackendRenderTarget& that); + GrBackendRenderTarget& operator=(const GrBackendRenderTarget&); + + SkISize dimensions() const { return {fWidth, fHeight}; } + int width() const { return fWidth; } + int height() const { return fHeight; } + int sampleCnt() const { return fSampleCnt; } + int stencilBits() const { return fStencilBits; } + GrBackendApi backend() const {return fBackend; } + bool isFramebufferOnly() const { return fFramebufferOnly; } + +#ifdef SK_GL + // If the backend API is GL, copies a snapshot of the GrGLFramebufferInfo struct into the passed + // in pointer and returns true. Otherwise returns false if the backend API is not GL. + bool getGLFramebufferInfo(GrGLFramebufferInfo*) const; +#endif + +#ifdef SK_DAWN + // If the backend API is Dawn, copies a snapshot of the GrDawnRenderTargetInfo struct into the + // passed-in pointer and returns true. Otherwise returns false if the backend API is not Dawn. + bool getDawnRenderTargetInfo(GrDawnRenderTargetInfo*) const; +#endif + +#ifdef SK_VULKAN + // If the backend API is Vulkan, copies a snapshot of the GrVkImageInfo struct into the passed + // in pointer and returns true. This snapshot will set the fImageLayout to the current layout + // state. Otherwise returns false if the backend API is not Vulkan. + bool getVkImageInfo(GrVkImageInfo*) const; + + // Anytime the client changes the VkImageLayout of the VkImage captured by this + // GrBackendRenderTarget, they must call this function to notify Skia of the changed layout. + void setVkImageLayout(VkImageLayout); +#endif + +#ifdef SK_METAL + // If the backend API is Metal, copies a snapshot of the GrMtlTextureInfo struct into the passed + // in pointer and returns true. Otherwise returns false if the backend API is not Metal. + bool getMtlTextureInfo(GrMtlTextureInfo*) const; +#endif + +#ifdef SK_DIRECT3D + // If the backend API is Direct3D, copies a snapshot of the GrMtlTextureInfo struct into the + // passed in pointer and returns true. Otherwise returns false if the backend API is not D3D. + bool getD3DTextureResourceInfo(GrD3DTextureResourceInfo*) const; + + // Anytime the client changes the D3D12_RESOURCE_STATES of the D3D12_RESOURCE captured by this + // GrBackendTexture, they must call this function to notify Skia of the changed layout. + void setD3DResourceState(GrD3DResourceStateEnum); +#endif + + // Get the GrBackendFormat for this render target (or an invalid format if this is not valid). + GrBackendFormat getBackendFormat() const; + + // If the backend API is Mock, copies a snapshot of the GrMockTextureInfo struct into the passed + // in pointer and returns true. Otherwise returns false if the backend API is not Mock. + bool getMockRenderTargetInfo(GrMockRenderTargetInfo*) const; + + // If the client changes any of the mutable backend of the GrBackendTexture they should call + // this function to inform Skia that those values have changed. The backend API specific state + // that can be set from this function are: + // + // Vulkan: VkImageLayout and QueueFamilyIndex + void setMutableState(const skgpu::MutableTextureState&); + + // Returns true if we are working with protected content. + bool isProtected() const; + + // Returns true if the backend texture has been initialized. + bool isValid() const { return fIsValid; } + + +#if GR_TEST_UTILS + static bool TestingOnly_Equals(const GrBackendRenderTarget&, const GrBackendRenderTarget&); +#endif + +private: + friend class GrVkGpu; // for getMutableState + sk_sp getMutableState() const; + +#ifdef SK_VULKAN + friend class GrVkRenderTarget; + GrBackendRenderTarget(int width, + int height, + const GrVkImageInfo& vkInfo, + sk_sp mutableState); +#endif + +#ifdef SK_DIRECT3D + friend class GrD3DGpu; + friend class GrD3DRenderTarget; + GrBackendRenderTarget(int width, + int height, + const GrD3DTextureResourceInfo& d3dInfo, + sk_sp state); + sk_sp getGrD3DResourceState() const; +#endif + + // Free and release and resources being held by the GrBackendTexture. + void cleanup(); + + bool fIsValid; + bool fFramebufferOnly = false; + int fWidth; // fMutableState; +}; + +#endif + +#endif diff --git a/gfx/skia/skia/include/gpu/GrBackendSurfaceMutableState.h b/gfx/skia/skia/include/gpu/GrBackendSurfaceMutableState.h new file mode 100644 index 0000000000..cbf27bf7e5 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrBackendSurfaceMutableState.h @@ -0,0 +1,26 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrBackendSurfaceMutableState_DEFINED +#define GrBackendSurfaceMutableState_DEFINED + +#include "include/gpu/MutableTextureState.h" + +class GrBackendSurfaceMutableState : public skgpu::MutableTextureState { +public: + GrBackendSurfaceMutableState() = default; + +#ifdef SK_VULKAN + GrBackendSurfaceMutableState(VkImageLayout layout, uint32_t queueFamilyIndex) + : skgpu::MutableTextureState(layout, queueFamilyIndex) {} +#endif + + GrBackendSurfaceMutableState(const GrBackendSurfaceMutableState& that) + : skgpu::MutableTextureState(that) {} +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/GrContextOptions.h b/gfx/skia/skia/include/gpu/GrContextOptions.h new file mode 100644 index 0000000000..bf4ca409a8 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrContextOptions.h @@ -0,0 +1,374 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrContextOptions_DEFINED +#define GrContextOptions_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/gpu/GrDriverBugWorkarounds.h" +#include "include/gpu/GrTypes.h" +#include "include/gpu/ShaderErrorHandler.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" + +#include + +class SkExecutor; + +#if defined(SK_GANESH) +struct SK_API GrContextOptions { + enum class Enable { + /** Forces an option to be disabled. */ + kNo, + /** Forces an option to be enabled. */ + kYes, + /** + * Uses Skia's default behavior, which may use runtime properties (e.g. driver version). + */ + kDefault + }; + + enum class ShaderCacheStrategy { + kSkSL, + kBackendSource, + kBackendBinary, + }; + + /** + * Abstract class which stores Skia data in a cache that persists between sessions. Currently, + * Skia stores compiled shader binaries (only when glProgramBinary / glGetProgramBinary are + * supported) when provided a persistent cache, but this may extend to other data in the future. + */ + class SK_API PersistentCache { + public: + virtual ~PersistentCache() = default; + + /** + * Returns the data for the key if it exists in the cache, otherwise returns null. + */ + virtual sk_sp load(const SkData& key) = 0; + + // Placeholder until all clients override the 3-parameter store(), then remove this, and + // make that version pure virtual. + virtual void store(const SkData& /*key*/, const SkData& /*data*/) { SkASSERT(false); } + + /** + * Stores data in the cache, indexed by key. description provides a human-readable + * version of the key. + */ + virtual void store(const SkData& key, const SkData& data, const SkString& /*description*/) { + this->store(key, data); + } + + protected: + PersistentCache() = default; + PersistentCache(const PersistentCache&) = delete; + PersistentCache& operator=(const PersistentCache&) = delete; + }; + + using ShaderErrorHandler = skgpu::ShaderErrorHandler; + + GrContextOptions() {} + + // Suppress prints for the GrContext. + bool fSuppressPrints = false; + + /** + * Controls whether we check for GL errors after functions that allocate resources (e.g. + * glTexImage2D), at the end of a GPU submission, or checking framebuffer completeness. The + * results of shader compilation and program linking are always checked, regardless of this + * option. Ignored on backends other than GL. + */ + Enable fSkipGLErrorChecks = Enable::kDefault; + + /** Overrides: These options override feature detection using backend API queries. These + overrides can only reduce the feature set or limits, never increase them beyond the + detected values. */ + + int fMaxTextureSizeOverride = SK_MaxS32; + + /** the threshold in bytes above which we will use a buffer mapping API to map vertex and index + buffers to CPU memory in order to update them. A value of -1 means the GrContext should + deduce the optimal value for this platform. */ + int fBufferMapThreshold = -1; + + /** + * Executor to handle threaded work within Ganesh. If this is nullptr, then all work will be + * done serially on the main thread. To have worker threads assist with various tasks, set this + * to a valid SkExecutor instance. Currently, used for software path rendering, but may be used + * for other tasks. + */ + SkExecutor* fExecutor = nullptr; + + /** Construct mipmaps manually, via repeated downsampling draw-calls. This is used when + the driver's implementation (glGenerateMipmap) contains bugs. This requires mipmap + level control (ie desktop or ES3). */ + bool fDoManualMipmapping = false; + + /** + * Disables the use of coverage counting shortcuts to render paths. Coverage counting can cause + * artifacts along shared edges if care isn't taken to ensure both contours wind in the same + * direction. + */ + // FIXME: Once this is removed from Chrome and Android, rename to fEnable"". + bool fDisableCoverageCountingPaths = true; + + /** + * Disables distance field rendering for paths. Distance field computation can be expensive, + * and yields no benefit if a path is not rendered multiple times with different transforms. + */ + bool fDisableDistanceFieldPaths = false; + + /** + * If true this allows path mask textures to be cached. This is only really useful if paths + * are commonly rendered at the same scale and fractional translation. + */ + bool fAllowPathMaskCaching = true; + + /** + * If true, the GPU will not be used to perform YUV -> RGB conversion when generating + * textures from codec-backed images. + */ + bool fDisableGpuYUVConversion = false; + + /** + * The maximum size of cache textures used for Skia's Glyph cache. + */ + size_t fGlyphCacheTextureMaximumBytes = 2048 * 1024 * 4; + + /** + * Below this threshold size in device space distance field fonts won't be used. Distance field + * fonts don't support hinting which is more important at smaller sizes. + */ + float fMinDistanceFieldFontSize = 18; + + /** + * Above this threshold size in device space glyphs are drawn as individual paths. + */ +#if defined(SK_BUILD_FOR_ANDROID) + float fGlyphsAsPathsFontSize = 384; +#elif defined(SK_BUILD_FOR_MAC) + float fGlyphsAsPathsFontSize = 256; +#else + float fGlyphsAsPathsFontSize = 324; +#endif + + /** + * Can the glyph atlas use multiple textures. If allowed, the each texture's size is bound by + * fGlypheCacheTextureMaximumBytes. + */ + Enable fAllowMultipleGlyphCacheTextures = Enable::kDefault; + + /** + * Bugs on certain drivers cause stencil buffers to leak. This flag causes Skia to avoid + * allocating stencil buffers and use alternate rasterization paths, avoiding the leak. + */ + bool fAvoidStencilBuffers = false; + + /** + * Enables driver workaround to use draws instead of HW clears, e.g. glClear on the GL backend. + */ + Enable fUseDrawInsteadOfClear = Enable::kDefault; + + /** + * Allow Ganesh to more aggressively reorder operations to reduce the number of render passes. + * Offscreen draws will be done upfront instead of interrupting the main render pass when + * possible. May increase VRAM usage, but still observes the resource cache limit. + * Enabled by default. + */ + Enable fReduceOpsTaskSplitting = Enable::kDefault; + + /** + * Some ES3 contexts report the ES2 external image extension, but not the ES3 version. + * If support for external images is critical, enabling this option will cause Ganesh to limit + * shaders to the ES2 shading language in that situation. + */ + bool fPreferExternalImagesOverES3 = false; + + /** + * Disables correctness workarounds that are enabled for particular GPUs, OSes, or drivers. + * This does not affect code path choices that are made for perfomance reasons nor does it + * override other GrContextOption settings. + */ + bool fDisableDriverCorrectnessWorkarounds = false; + + /** + * Maximum number of GPU programs or pipelines to keep active in the runtime cache. + */ + int fRuntimeProgramCacheSize = 256; + + /** + * Cache in which to store compiled shader binaries between runs. + */ + PersistentCache* fPersistentCache = nullptr; + + /** + * This affects the usage of the PersistentCache. We can cache SkSL, backend source (GLSL), or + * backend binaries (GL program binaries). By default we cache binaries, but if the driver's + * binary loading/storing is believed to have bugs, this can be limited to caching GLSL. + * Caching GLSL strings still saves CPU work when a GL program is created. + */ + ShaderCacheStrategy fShaderCacheStrategy = ShaderCacheStrategy::kBackendBinary; + + /** + * If present, use this object to report shader compilation failures. If not, report failures + * via SkDebugf and assert. + */ + ShaderErrorHandler* fShaderErrorHandler = nullptr; + + /** + * Specifies the number of samples Ganesh should use when performing internal draws with MSAA + * (hardware capabilities permitting). + * + * If 0, Ganesh will disable internal code paths that use multisampling. + */ + int fInternalMultisampleCount = 4; + + /** + * In Skia's vulkan backend a single GrContext submit equates to the submission of a single + * primary command buffer to the VkQueue. This value specifies how many vulkan secondary command + * buffers we will cache for reuse on a given primary command buffer. A single submit may use + * more than this many secondary command buffers, but after the primary command buffer is + * finished on the GPU it will only hold on to this many secondary command buffers for reuse. + * + * A value of -1 means we will pick a limit value internally. + */ + int fMaxCachedVulkanSecondaryCommandBuffers = -1; + + /** + * If true, the caps will never support mipmaps. + */ + bool fSuppressMipmapSupport = false; + + /** + * If true, the TessellationPathRenderer will not be used for path rendering. + * If false, will fallback to any driver workarounds, if set. + */ + bool fDisableTessellationPathRenderer = false; + + /** + * If true, and if supported, enables hardware tessellation in the caps. + * DEPRECATED: This value is ignored; experimental hardware tessellation is always disabled. + */ + bool fEnableExperimentalHardwareTessellation = false; + + /** + * If true, then add 1 pixel padding to all glyph masks in the atlas to support bi-lerp + * rendering of all glyphs. This must be set to true to use Slugs. + */ + bool fSupportBilerpFromGlyphAtlas = false; + + /** + * Uses a reduced variety of shaders. May perform less optimally in steady state but can reduce + * jank due to shader compilations. + */ + bool fReducedShaderVariations = false; + + /** + * If true, then allow to enable MSAA on new Intel GPUs. + */ + bool fAllowMSAAOnNewIntel = false; + + /** + * Currently on ARM Android we disable the use of GL TexStorage because of memory regressions. + * However, some clients may still want to use TexStorage. For example, TexStorage support is + * required for creating protected textures. + * + * This flag has no impact on non GL backends. + */ + bool fAlwaysUseTexStorageWhenAvailable = false; + + /** + * Optional callback that can be passed into the GrDirectContext which will be called when the + * GrDirectContext is about to be destroyed. When this call is made, it will be safe for the + * client to delete the GPU backend context that is backing the GrDirectContext. The + * GrDirectContextDestroyedContext will be passed back to the client in the callback. + */ + GrDirectContextDestroyedContext fContextDeleteContext = nullptr; + GrDirectContextDestroyedProc fContextDeleteProc = nullptr; + +#if GR_TEST_UTILS + /** + * Private options that are only meant for testing within Skia's tools. + */ + + /** + * Testing-only mode to exercise allocation failures in the flush-time callback objects. + * For now it only simulates allocation failure during the preFlush callback. + */ + bool fFailFlushTimeCallbacks = false; + + /** + * Prevents use of dual source blending, to test that all xfer modes work correctly without it. + */ + bool fSuppressDualSourceBlending = false; + + /** + * Prevents the use of non-coefficient-based blend equations, for testing dst reads, barriers, + * and in-shader blending. + */ + bool fSuppressAdvancedBlendEquations = false; + + /** + * Prevents the use of framebuffer fetches, for testing dst reads and texture barriers. + */ + bool fSuppressFramebufferFetch = false; + + /** + * If true, then all paths are processed as if "setIsVolatile" had been called. + */ + bool fAllPathsVolatile = false; + + /** + * Render everything in wireframe + */ + bool fWireframeMode = false; + + /** + * Enforces clearing of all textures when they're created. + */ + bool fClearAllTextures = false; + + /** + * Randomly generate a (false) GL_OUT_OF_MEMORY error + */ + bool fRandomGLOOM = false; + + /** + * Force off support for write/transfer pixels row bytes in caps. + */ + bool fDisallowWriteAndTransferPixelRowBytes = false; + + /** + * Include or exclude specific GPU path renderers. + */ + GpuPathRenderers fGpuPathRenderers = GpuPathRenderers::kDefault; + + /** + * Specify the GPU resource cache limit. Equivalent to calling `setResourceCacheLimit` on the + * context at construction time. + * + * A value of -1 means use the default limit value. + */ + int fResourceCacheLimitOverride = -1; + + /** + * Maximum width and height of internal texture atlases. + */ + int fMaxTextureAtlasSize = 2048; +#endif + + GrDriverBugWorkarounds fDriverBugWorkarounds; +}; +#else +struct GrContextOptions { + struct PersistentCache {}; +}; +#endif + +#endif diff --git a/gfx/skia/skia/include/gpu/GrContextThreadSafeProxy.h b/gfx/skia/skia/include/gpu/GrContextThreadSafeProxy.h new file mode 100644 index 0000000000..eb75555364 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrContextThreadSafeProxy.h @@ -0,0 +1,169 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrContextThreadSafeProxy_DEFINED +#define GrContextThreadSafeProxy_DEFINED + +#include "include/core/SkRefCnt.h" + +#if defined(SK_GANESH) + +#include "include/core/SkImageInfo.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrContextOptions.h" +#include "include/gpu/GrTypes.h" + +#include + +class GrBackendFormat; +class GrCaps; +class GrContextThreadSafeProxyPriv; +class GrThreadSafeCache; +class GrThreadSafePipelineBuilder; +class SkSurfaceCharacterization; +class SkSurfaceProps; +enum class SkTextureCompressionType; + +namespace sktext::gpu { class TextBlobRedrawCoordinator; } + +/** + * Can be used to perform actions related to the generating GrContext in a thread safe manner. The + * proxy does not access the 3D API (e.g. OpenGL) that backs the generating GrContext. + */ +class SK_API GrContextThreadSafeProxy final : public SkNVRefCnt { +public: + ~GrContextThreadSafeProxy(); + + /** + * Create a surface characterization for a DDL that will be replayed into the GrContext + * that created this proxy. On failure the resulting characterization will be invalid (i.e., + * "!c.isValid()"). + * + * @param cacheMaxResourceBytes The max resource bytes limit that will be in effect + * when the DDL created with this characterization is + * replayed. + * Note: the contract here is that the DDL will be + * created as if it had a full 'cacheMaxResourceBytes' + * to use. If replayed into a GrContext that already has + * locked GPU memory, the replay can exceed the budget. + * To rephrase, all resource allocation decisions are + * made at record time and at playback time the budget + * limits will be ignored. + * @param ii The image info specifying properties of the SkSurface + * that the DDL created with this characterization will + * be replayed into. + * Note: Ganesh doesn't make use of the SkImageInfo's + * alphaType + * @param backendFormat Information about the format of the GPU surface that + * will back the SkSurface upon replay + * @param sampleCount The sample count of the SkSurface that the DDL + * created with this characterization will be replayed + * into + * @param origin The origin of the SkSurface that the DDL created with + * this characterization will be replayed into + * @param surfaceProps The surface properties of the SkSurface that the DDL + * created with this characterization will be replayed + * into + * @param isMipMapped Will the surface the DDL will be replayed into have + * space allocated for mipmaps? + * @param willUseGLFBO0 Will the surface the DDL will be replayed into be + * backed by GL FBO 0. This flag is only valid if using + * an GL backend. + * @param isTextureable Will the surface be able to act as a texture? + * @param isProtected Will the (Vulkan) surface be DRM protected? + * @param vkRTSupportsInputAttachment Can the vulkan surface be used as in input + attachment? + * @param forVulkanSecondaryCommandBuffer Will the surface be wrapping a vulkan secondary + * command buffer via a GrVkSecondaryCBDrawContext? If + * this is true then the following is required: + * isTexureable = false + * isMipMapped = false + * willUseGLFBO0 = false + * vkRTSupportsInputAttachment = false + */ + SkSurfaceCharacterization createCharacterization( + size_t cacheMaxResourceBytes, + const SkImageInfo& ii, + const GrBackendFormat& backendFormat, + int sampleCount, + GrSurfaceOrigin origin, + const SkSurfaceProps& surfaceProps, + bool isMipMapped, + bool willUseGLFBO0 = false, + bool isTextureable = true, + GrProtected isProtected = GrProtected::kNo, + bool vkRTSupportsInputAttachment = false, + bool forVulkanSecondaryCommandBuffer = false); + + /* + * Retrieve the default GrBackendFormat for a given SkColorType and renderability. + * It is guaranteed that this backend format will be the one used by the following + * SkColorType and SkSurfaceCharacterization-based createBackendTexture methods. + * + * The caller should check that the returned format is valid. + */ + GrBackendFormat defaultBackendFormat(SkColorType ct, GrRenderable renderable) const; + + /** + * Retrieve the GrBackendFormat for a given SkTextureCompressionType. This is + * guaranteed to match the backend format used by the following + * createCompressedBackendTexture methods that take a CompressionType. + * + * The caller should check that the returned format is valid. + */ + GrBackendFormat compressedBackendFormat(SkTextureCompressionType c) const; + + /** + * Gets the maximum supported sample count for a color type. 1 is returned if only non-MSAA + * rendering is supported for the color type. 0 is returned if rendering to this color type + * is not supported at all. + */ + int maxSurfaceSampleCountForColorType(SkColorType colorType) const; + + bool isValid() const { return nullptr != fCaps; } + + bool operator==(const GrContextThreadSafeProxy& that) const { + // Each GrContext should only ever have a single thread-safe proxy. + SkASSERT((this == &that) == (this->fContextID == that.fContextID)); + return this == &that; + } + + bool operator!=(const GrContextThreadSafeProxy& that) const { return !(*this == that); } + + // Provides access to functions that aren't part of the public API. + GrContextThreadSafeProxyPriv priv(); + const GrContextThreadSafeProxyPriv priv() const; // NOLINT(readability-const-return-type) + +private: + friend class GrContextThreadSafeProxyPriv; // for ctor and hidden methods + + // DDL TODO: need to add unit tests for backend & maybe options + GrContextThreadSafeProxy(GrBackendApi, const GrContextOptions&); + + void abandonContext(); + bool abandoned() const; + + // TODO: This should be part of the constructor but right now we have a chicken-and-egg problem + // with GrContext where we get the caps by creating a GPU which requires a context (see the + // `init` method on GrContext_Base). + void init(sk_sp, sk_sp); + + const GrBackendApi fBackend; + const GrContextOptions fOptions; + const uint32_t fContextID; + sk_sp fCaps; + std::unique_ptr fTextBlobRedrawCoordinator; + std::unique_ptr fThreadSafeCache; + sk_sp fPipelineBuilder; + std::atomic fAbandoned{false}; +}; + +#else // !defined(SK_GANESH) +class SK_API GrContextThreadSafeProxy final : public SkNVRefCnt {}; +#endif + +#endif diff --git a/gfx/skia/skia/include/gpu/GrDirectContext.h b/gfx/skia/skia/include/gpu/GrDirectContext.h new file mode 100644 index 0000000000..05c8099d3d --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrDirectContext.h @@ -0,0 +1,908 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrDirectContext_DEFINED +#define GrDirectContext_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrContextOptions.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" + +#include +#include +#include +#include +#include + +class GrAtlasManager; +class GrBackendSemaphore; +class GrBackendFormat; +class GrBackendTexture; +class GrBackendRenderTarget; +class GrClientMappedBufferManager; +class GrContextThreadSafeProxy; +class GrDirectContextPriv; +class GrGpu; +class GrResourceCache; +class GrResourceProvider; +class SkData; +class SkPixmap; +class SkTaskGroup; +class SkTraceMemoryDump; +enum SkColorType : int; +enum class SkTextureCompressionType; +struct GrGLInterface; +struct GrMockOptions; +struct GrVkBackendContext; // IWYU pragma: keep +struct GrD3DBackendContext; // IWYU pragma: keep +struct GrMtlBackendContext; // IWYU pragma: keep + +namespace skgpu { + class MutableTextureState; +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + namespace ganesh { class SmallPathAtlasMgr; } +#endif +} +namespace sktext { namespace gpu { class StrikeCache; } } +namespace wgpu { class Device; } // IWYU pragma: keep + +class SK_API GrDirectContext : public GrRecordingContext { +public: +#ifdef SK_GL + /** + * Creates a GrDirectContext for a backend context. If no GrGLInterface is provided then the + * result of GrGLMakeNativeInterface() is used if it succeeds. + */ + static sk_sp MakeGL(sk_sp, const GrContextOptions&); + static sk_sp MakeGL(sk_sp); + static sk_sp MakeGL(const GrContextOptions&); + static sk_sp MakeGL(); +#endif + +#ifdef SK_VULKAN + /** + * The Vulkan context (VkQueue, VkDevice, VkInstance) must be kept alive until the returned + * GrDirectContext is destroyed. This also means that any objects created with this + * GrDirectContext (e.g. SkSurfaces, SkImages, etc.) must also be released as they may hold + * refs on the GrDirectContext. Once all these objects and the GrDirectContext are released, + * then it is safe to delete the vulkan objects. + */ + static sk_sp MakeVulkan(const GrVkBackendContext&, const GrContextOptions&); + static sk_sp MakeVulkan(const GrVkBackendContext&); +#endif + +#ifdef SK_METAL + /** + * Makes a GrDirectContext which uses Metal as the backend. The GrMtlBackendContext contains a + * MTLDevice and MTLCommandQueue which should be used by the backend. These objects must + * have their own ref which will be released when the GrMtlBackendContext is destroyed. + * Ganesh will take its own ref on the objects which will be released when the GrDirectContext + * is destroyed. + */ + static sk_sp MakeMetal(const GrMtlBackendContext&, const GrContextOptions&); + static sk_sp MakeMetal(const GrMtlBackendContext&); + /** + * Deprecated. + * + * Makes a GrDirectContext which uses Metal as the backend. The device parameter is an + * MTLDevice and queue is an MTLCommandQueue which should be used by the backend. These objects + * must have a ref on them that can be transferred to Ganesh, which will release the ref + * when the GrDirectContext is destroyed. + */ + static sk_sp MakeMetal(void* device, void* queue, const GrContextOptions&); + static sk_sp MakeMetal(void* device, void* queue); +#endif + +#ifdef SK_DIRECT3D + /** + * Makes a GrDirectContext which uses Direct3D as the backend. The Direct3D context + * must be kept alive until the returned GrDirectContext is first destroyed or abandoned. + */ + static sk_sp MakeDirect3D(const GrD3DBackendContext&, const GrContextOptions&); + static sk_sp MakeDirect3D(const GrD3DBackendContext&); +#endif + +#ifdef SK_DAWN + static sk_sp MakeDawn(const wgpu::Device&, + const GrContextOptions&); + static sk_sp MakeDawn(const wgpu::Device&); +#endif + + static sk_sp MakeMock(const GrMockOptions*, const GrContextOptions&); + static sk_sp MakeMock(const GrMockOptions*); + + ~GrDirectContext() override; + + /** + * The context normally assumes that no outsider is setting state + * within the underlying 3D API's context/device/whatever. This call informs + * the context that the state was modified and it should resend. Shouldn't + * be called frequently for good performance. + * The flag bits, state, is dependent on which backend is used by the + * context, either GL or D3D (possible in future). + */ + void resetContext(uint32_t state = kAll_GrBackendState); + + /** + * If the backend is GrBackendApi::kOpenGL, then all texture unit/target combinations for which + * the context has modified the bound texture will have texture id 0 bound. This does not + * flush the context. Calling resetContext() does not change the set that will be bound + * to texture id 0 on the next call to resetGLTextureBindings(). After this is called + * all unit/target combinations are considered to have unmodified bindings until the context + * subsequently modifies them (meaning if this is called twice in a row with no intervening + * context usage then the second call is a no-op.) + */ + void resetGLTextureBindings(); + + /** + * Abandons all GPU resources and assumes the underlying backend 3D API context is no longer + * usable. Call this if you have lost the associated GPU context, and thus internal texture, + * buffer, etc. references/IDs are now invalid. Calling this ensures that the destructors of the + * context and any of its created resource objects will not make backend 3D API calls. Content + * rendered but not previously flushed may be lost. After this function is called all subsequent + * calls on the context will fail or be no-ops. + * + * The typical use case for this function is that the underlying 3D context was lost and further + * API calls may crash. + * + * This call is not valid to be made inside ReleaseProcs passed into SkSurface or SkImages. The + * call will simply fail (and assert in debug) if it is called while inside a ReleaseProc. + * + * For Vulkan, even if the device becomes lost, the VkQueue, VkDevice, or VkInstance used to + * create the context must be kept alive even after abandoning the context. Those objects must + * live for the lifetime of the context object itself. The reason for this is so that + * we can continue to delete any outstanding GrBackendTextures/RenderTargets which must be + * cleaned up even in a device lost state. + */ + void abandonContext() override; + + /** + * Returns true if the context was abandoned or if the if the backend specific context has + * gotten into an unrecoverarble, lost state (e.g. in Vulkan backend if we've gotten a + * VK_ERROR_DEVICE_LOST). If the backend context is lost, this call will also abandon this + * context. + */ + bool abandoned() override; + + // TODO: Remove this from public after migrating Chrome. + sk_sp threadSafeProxy(); + + /** + * Checks if the underlying 3D API reported an out-of-memory error. If this returns true it is + * reset and will return false until another out-of-memory error is reported by the 3D API. If + * the context is abandoned then this will report false. + * + * Currently this is implemented for: + * + * OpenGL [ES] - Note that client calls to glGetError() may swallow GL_OUT_OF_MEMORY errors and + * therefore hide the error from Skia. Also, it is not advised to use this in combination with + * enabling GrContextOptions::fSkipGLErrorChecks. That option may prevent the context from ever + * checking the GL context for OOM. + * + * Vulkan - Reports true if VK_ERROR_OUT_OF_HOST_MEMORY or VK_ERROR_OUT_OF_DEVICE_MEMORY has + * occurred. + */ + bool oomed(); + + /** + * This is similar to abandonContext() however the underlying 3D context is not yet lost and + * the context will cleanup all allocated resources before returning. After returning it will + * assume that the underlying context may no longer be valid. + * + * The typical use case for this function is that the client is going to destroy the 3D context + * but can't guarantee that context will be destroyed first (perhaps because it may be ref'ed + * elsewhere by either the client or Skia objects). + * + * For Vulkan, even if the device becomes lost, the VkQueue, VkDevice, or VkInstance used to + * create the context must be alive before calling releaseResourcesAndAbandonContext. + */ + void releaseResourcesAndAbandonContext(); + + /////////////////////////////////////////////////////////////////////////// + // Resource Cache + + /** DEPRECATED + * Return the current GPU resource cache limits. + * + * @param maxResources If non-null, will be set to -1. + * @param maxResourceBytes If non-null, returns maximum number of bytes of + * video memory that can be held in the cache. + */ + void getResourceCacheLimits(int* maxResources, size_t* maxResourceBytes) const; + + /** + * Return the current GPU resource cache limit in bytes. + */ + size_t getResourceCacheLimit() const; + + /** + * Gets the current GPU resource cache usage. + * + * @param resourceCount If non-null, returns the number of resources that are held in the + * cache. + * @param maxResourceBytes If non-null, returns the total number of bytes of video memory held + * in the cache. + */ + void getResourceCacheUsage(int* resourceCount, size_t* resourceBytes) const; + + /** + * Gets the number of bytes in the cache consumed by purgeable (e.g. unlocked) resources. + */ + size_t getResourceCachePurgeableBytes() const; + + /** DEPRECATED + * Specify the GPU resource cache limits. If the current cache exceeds the maxResourceBytes + * limit, it will be purged (LRU) to keep the cache within the limit. + * + * @param maxResources Unused. + * @param maxResourceBytes The maximum number of bytes of video memory + * that can be held in the cache. + */ + void setResourceCacheLimits(int maxResources, size_t maxResourceBytes); + + /** + * Specify the GPU resource cache limit. If the cache currently exceeds this limit, + * it will be purged (LRU) to keep the cache within the limit. + * + * @param maxResourceBytes The maximum number of bytes of video memory + * that can be held in the cache. + */ + void setResourceCacheLimit(size_t maxResourceBytes); + + /** + * Frees GPU created by the context. Can be called to reduce GPU memory + * pressure. + */ + void freeGpuResources(); + + /** + * Purge GPU resources that haven't been used in the past 'msNotUsed' milliseconds or are + * otherwise marked for deletion, regardless of whether the context is under budget. + * + * If 'scratchResourcesOnly' is true all unlocked scratch resources older than 'msNotUsed' will + * be purged but the unlocked resources with persistent data will remain. If + * 'scratchResourcesOnly' is false then all unlocked resources older than 'msNotUsed' will be + * purged. + * + * @param msNotUsed Only unlocked resources not used in these last milliseconds + * will be cleaned up. + * @param scratchResourcesOnly If true only unlocked scratch resources will be purged. + */ + void performDeferredCleanup(std::chrono::milliseconds msNotUsed, + bool scratchResourcesOnly=false); + + // Temporary compatibility API for Android. + void purgeResourcesNotUsedInMs(std::chrono::milliseconds msNotUsed) { + this->performDeferredCleanup(msNotUsed); + } + + /** + * Purge unlocked resources from the cache until the the provided byte count has been reached + * or we have purged all unlocked resources. The default policy is to purge in LRU order, but + * can be overridden to prefer purging scratch resources (in LRU order) prior to purging other + * resource types. + * + * @param maxBytesToPurge the desired number of bytes to be purged. + * @param preferScratchResources If true scratch resources will be purged prior to other + * resource types. + */ + void purgeUnlockedResources(size_t bytesToPurge, bool preferScratchResources); + + /** + * This entry point is intended for instances where an app has been backgrounded or + * suspended. + * If 'scratchResourcesOnly' is true all unlocked scratch resources will be purged but the + * unlocked resources with persistent data will remain. If 'scratchResourcesOnly' is false + * then all unlocked resources will be purged. + * In either case, after the unlocked resources are purged a separate pass will be made to + * ensure that resource usage is under budget (i.e., even if 'scratchResourcesOnly' is true + * some resources with persistent data may be purged to be under budget). + * + * @param scratchResourcesOnly If true only unlocked scratch resources will be purged prior + * enforcing the budget requirements. + */ + void purgeUnlockedResources(bool scratchResourcesOnly); + + /** + * Gets the maximum supported texture size. + */ + using GrRecordingContext::maxTextureSize; + + /** + * Gets the maximum supported render target size. + */ + using GrRecordingContext::maxRenderTargetSize; + + /** + * Can a SkImage be created with the given color type. + */ + using GrRecordingContext::colorTypeSupportedAsImage; + + /** + * Can a SkSurface be created with the given color type. To check whether MSAA is supported + * use maxSurfaceSampleCountForColorType(). + */ + using GrRecordingContext::colorTypeSupportedAsSurface; + + /** + * Gets the maximum supported sample count for a color type. 1 is returned if only non-MSAA + * rendering is supported for the color type. 0 is returned if rendering to this color type + * is not supported at all. + */ + using GrRecordingContext::maxSurfaceSampleCountForColorType; + + /////////////////////////////////////////////////////////////////////////// + // Misc. + + /** + * Inserts a list of GPU semaphores that the current GPU-backed API must wait on before + * executing any more commands on the GPU. If this call returns false, then the GPU back-end + * will not wait on any passed in semaphores, and the client will still own the semaphores, + * regardless of the value of deleteSemaphoresAfterWait. + * + * If deleteSemaphoresAfterWait is false then Skia will not delete the semaphores. In this case + * it is the client's responsibility to not destroy or attempt to reuse the semaphores until it + * knows that Skia has finished waiting on them. This can be done by using finishedProcs on + * flush calls. + */ + bool wait(int numSemaphores, const GrBackendSemaphore* waitSemaphores, + bool deleteSemaphoresAfterWait = true); + + /** + * Call to ensure all drawing to the context has been flushed and submitted to the underlying 3D + * API. This is equivalent to calling GrContext::flush with a default GrFlushInfo followed by + * GrContext::submit(syncCpu). + */ + void flushAndSubmit(bool syncCpu = false) { + this->flush(GrFlushInfo()); + this->submit(syncCpu); + } + + /** + * Call to ensure all drawing to the context has been flushed to underlying 3D API specific + * objects. A call to `submit` is always required to ensure work is actually sent to + * the gpu. Some specific API details: + * GL: Commands are actually sent to the driver, but glFlush is never called. Thus some + * sync objects from the flush will not be valid until a submission occurs. + * + * Vulkan/Metal/D3D/Dawn: Commands are recorded to the backend APIs corresponding command + * buffer or encoder objects. However, these objects are not sent to the gpu until a + * submission occurs. + * + * If the return is GrSemaphoresSubmitted::kYes, only initialized GrBackendSemaphores will be + * submitted to the gpu during the next submit call (it is possible Skia failed to create a + * subset of the semaphores). The client should not wait on these semaphores until after submit + * has been called, and must keep them alive until then. If this call returns + * GrSemaphoresSubmitted::kNo, the GPU backend will not submit any semaphores to be signaled on + * the GPU. Thus the client should not have the GPU wait on any of the semaphores passed in with + * the GrFlushInfo. Regardless of whether semaphores were submitted to the GPU or not, the + * client is still responsible for deleting any initialized semaphores. + * Regardleess of semaphore submission the context will still be flushed. It should be + * emphasized that a return value of GrSemaphoresSubmitted::kNo does not mean the flush did not + * happen. It simply means there were no semaphores submitted to the GPU. A caller should only + * take this as a failure if they passed in semaphores to be submitted. + */ + GrSemaphoresSubmitted flush(const GrFlushInfo& info); + + void flush() { this->flush({}); } + + /** + * Submit outstanding work to the gpu from all previously un-submitted flushes. The return + * value of the submit will indicate whether or not the submission to the GPU was successful. + * + * If the call returns true, all previously passed in semaphores in flush calls will have been + * submitted to the GPU and they can safely be waited on. The caller should wait on those + * semaphores or perform some other global synchronization before deleting the semaphores. + * + * If it returns false, then those same semaphores will not have been submitted and we will not + * try to submit them again. The caller is free to delete the semaphores at any time. + * + * If the syncCpu flag is true this function will return once the gpu has finished with all + * submitted work. + */ + bool submit(bool syncCpu = false); + + /** + * Checks whether any asynchronous work is complete and if so calls related callbacks. + */ + void checkAsyncWorkCompletion(); + + /** Enumerates all cached GPU resources and dumps their memory to traceMemoryDump. */ + // Chrome is using this! + void dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const; + + bool supportsDistanceFieldText() const; + + void storeVkPipelineCacheData(); + + /** + * Retrieve the default GrBackendFormat for a given SkColorType and renderability. + * It is guaranteed that this backend format will be the one used by the following + * SkColorType and SkSurfaceCharacterization-based createBackendTexture methods. + * + * The caller should check that the returned format is valid. + */ + using GrRecordingContext::defaultBackendFormat; + + /** + * The explicitly allocated backend texture API allows clients to use Skia to create backend + * objects outside of Skia proper (i.e., Skia's caching system will not know about them.) + * + * It is the client's responsibility to delete all these objects (using deleteBackendTexture) + * before deleting the context used to create them. If the backend is Vulkan, the textures must + * be deleted before abandoning the context as well. Additionally, clients should only delete + * these objects on the thread for which that context is active. + * + * The client is responsible for ensuring synchronization between different uses + * of the backend object (i.e., wrapping it in a surface, rendering to it, deleting the + * surface, rewrapping it in a image and drawing the image will require explicit + * synchronization on the client's part). + */ + + /** + * If possible, create an uninitialized backend texture. The client should ensure that the + * returned backend texture is valid. + * For the Vulkan backend the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_UNDEFINED. + */ + GrBackendTexture createBackendTexture(int width, + int height, + const GrBackendFormat&, + GrMipmapped, + GrRenderable, + GrProtected = GrProtected::kNo, + std::string_view label = {}); + + /** + * If possible, create an uninitialized backend texture. The client should ensure that the + * returned backend texture is valid. + * If successful, the created backend texture will be compatible with the provided + * SkColorType. + * For the Vulkan backend the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_UNDEFINED. + */ + GrBackendTexture createBackendTexture(int width, int height, + SkColorType, + GrMipmapped, + GrRenderable, + GrProtected = GrProtected::kNo, + std::string_view label = {}); + + /** + * If possible, create a backend texture initialized to a particular color. The client should + * ensure that the returned backend texture is valid. The client can pass in a finishedProc + * to be notified when the data has been uploaded by the gpu and the texture can be deleted. The + * client is required to call `submit` to send the upload work to the gpu. The + * finishedProc will always get called even if we failed to create the GrBackendTexture. + * For the Vulkan backend the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + GrBackendTexture createBackendTexture(int width, int height, + const GrBackendFormat&, + const SkColor4f& color, + GrMipmapped, + GrRenderable, + GrProtected = GrProtected::kNo, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr, + std::string_view label = {}); + + /** + * If possible, create a backend texture initialized to a particular color. The client should + * ensure that the returned backend texture is valid. The client can pass in a finishedProc + * to be notified when the data has been uploaded by the gpu and the texture can be deleted. The + * client is required to call `submit` to send the upload work to the gpu. The + * finishedProc will always get called even if we failed to create the GrBackendTexture. + * If successful, the created backend texture will be compatible with the provided + * SkColorType. + * For the Vulkan backend the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + GrBackendTexture createBackendTexture(int width, int height, + SkColorType, + const SkColor4f& color, + GrMipmapped, + GrRenderable, + GrProtected = GrProtected::kNo, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr, + std::string_view label = {}); + + /** + * If possible, create a backend texture initialized with the provided pixmap data. The client + * should ensure that the returned backend texture is valid. The client can pass in a + * finishedProc to be notified when the data has been uploaded by the gpu and the texture can be + * deleted. The client is required to call `submit` to send the upload work to the gpu. + * The finishedProc will always get called even if we failed to create the GrBackendTexture. + * If successful, the created backend texture will be compatible with the provided + * pixmap(s). Compatible, in this case, means that the backend format will be the result + * of calling defaultBackendFormat on the base pixmap's colortype. The src data can be deleted + * when this call returns. + * If numLevels is 1 a non-mipmapped texture will result. If a mipmapped texture is desired + * the data for all the mipmap levels must be provided. In the mipmapped case all the + * colortypes of the provided pixmaps must be the same. Additionally, all the miplevels + * must be sized correctly (please see SkMipmap::ComputeLevelSize and ComputeLevelCount). The + * GrSurfaceOrigin controls whether the pixmap data is vertically flipped in the texture. + * Note: the pixmap's alphatypes and colorspaces are ignored. + * For the Vulkan backend the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + GrBackendTexture createBackendTexture(const SkPixmap srcData[], + int numLevels, + GrSurfaceOrigin, + GrRenderable, + GrProtected, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr, + std::string_view label = {}); + + /** + * Convenience version createBackendTexture() that takes just a base level pixmap. + */ + GrBackendTexture createBackendTexture(const SkPixmap& srcData, + GrSurfaceOrigin textureOrigin, + GrRenderable renderable, + GrProtected isProtected, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr, + std::string_view label = {}); + + // Deprecated versions that do not take origin and assume top-left. + GrBackendTexture createBackendTexture(const SkPixmap srcData[], + int numLevels, + GrRenderable renderable, + GrProtected isProtected, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr, + std::string_view label = {}); + + GrBackendTexture createBackendTexture(const SkPixmap& srcData, + GrRenderable renderable, + GrProtected isProtected, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr, + std::string_view label = {}); + + /** + * If possible, updates a backend texture to be filled to a particular color. The client should + * check the return value to see if the update was successful. The client can pass in a + * finishedProc to be notified when the data has been uploaded by the gpu and the texture can be + * deleted. The client is required to call `submit` to send the upload work to the gpu. + * The finishedProc will always get called even if we failed to update the GrBackendTexture. + * For the Vulkan backend after a successful update the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + bool updateBackendTexture(const GrBackendTexture&, + const SkColor4f& color, + GrGpuFinishedProc finishedProc, + GrGpuFinishedContext finishedContext); + + /** + * If possible, updates a backend texture to be filled to a particular color. The data in + * GrBackendTexture and passed in color is interpreted with respect to the passed in + * SkColorType. The client should check the return value to see if the update was successful. + * The client can pass in a finishedProc to be notified when the data has been uploaded by the + * gpu and the texture can be deleted. The client is required to call `submit` to send + * the upload work to the gpu. The finishedProc will always get called even if we failed to + * update the GrBackendTexture. + * For the Vulkan backend after a successful update the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + bool updateBackendTexture(const GrBackendTexture&, + SkColorType skColorType, + const SkColor4f& color, + GrGpuFinishedProc finishedProc, + GrGpuFinishedContext finishedContext); + + /** + * If possible, updates a backend texture filled with the provided pixmap data. The client + * should check the return value to see if the update was successful. The client can pass in a + * finishedProc to be notified when the data has been uploaded by the gpu and the texture can be + * deleted. The client is required to call `submit` to send the upload work to the gpu. + * The finishedProc will always get called even if we failed to create the GrBackendTexture. + * The backend texture must be compatible with the provided pixmap(s). Compatible, in this case, + * means that the backend format is compatible with the base pixmap's colortype. The src data + * can be deleted when this call returns. + * If the backend texture is mip mapped, the data for all the mipmap levels must be provided. + * In the mipmapped case all the colortypes of the provided pixmaps must be the same. + * Additionally, all the miplevels must be sized correctly (please see + * SkMipmap::ComputeLevelSize and ComputeLevelCount). The GrSurfaceOrigin controls whether the + * pixmap data is vertically flipped in the texture. + * Note: the pixmap's alphatypes and colorspaces are ignored. + * For the Vulkan backend after a successful update the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + bool updateBackendTexture(const GrBackendTexture&, + const SkPixmap srcData[], + int numLevels, + GrSurfaceOrigin = kTopLeft_GrSurfaceOrigin, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr); + + /** + * Convenience version of updateBackendTexture that takes just a base level pixmap. + */ + bool updateBackendTexture(const GrBackendTexture& texture, + const SkPixmap& srcData, + GrSurfaceOrigin textureOrigin = kTopLeft_GrSurfaceOrigin, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr) { + return this->updateBackendTexture(texture, + &srcData, + 1, + textureOrigin, + finishedProc, + finishedContext); + } + + // Deprecated version that does not take origin and assumes top-left. + bool updateBackendTexture(const GrBackendTexture& texture, + const SkPixmap srcData[], + int numLevels, + GrGpuFinishedProc finishedProc, + GrGpuFinishedContext finishedContext); + + /** + * Retrieve the GrBackendFormat for a given SkTextureCompressionType. This is + * guaranteed to match the backend format used by the following + * createCompressedBackendTexture methods that take a CompressionType. + * + * The caller should check that the returned format is valid. + */ + using GrRecordingContext::compressedBackendFormat; + + /** + *If possible, create a compressed backend texture initialized to a particular color. The + * client should ensure that the returned backend texture is valid. The client can pass in a + * finishedProc to be notified when the data has been uploaded by the gpu and the texture can be + * deleted. The client is required to call `submit` to send the upload work to the gpu. + * The finishedProc will always get called even if we failed to create the GrBackendTexture. + * For the Vulkan backend the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + GrBackendTexture createCompressedBackendTexture(int width, int height, + const GrBackendFormat&, + const SkColor4f& color, + GrMipmapped, + GrProtected = GrProtected::kNo, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr); + + GrBackendTexture createCompressedBackendTexture(int width, int height, + SkTextureCompressionType, + const SkColor4f& color, + GrMipmapped, + GrProtected = GrProtected::kNo, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr); + + /** + * If possible, create a backend texture initialized with the provided raw data. The client + * should ensure that the returned backend texture is valid. The client can pass in a + * finishedProc to be notified when the data has been uploaded by the gpu and the texture can be + * deleted. The client is required to call `submit` to send the upload work to the gpu. + * The finishedProc will always get called even if we failed to create the GrBackendTexture + * If numLevels is 1 a non-mipmapped texture will result. If a mipmapped texture is desired + * the data for all the mipmap levels must be provided. Additionally, all the miplevels + * must be sized correctly (please see SkMipmap::ComputeLevelSize and ComputeLevelCount). + * For the Vulkan backend the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + GrBackendTexture createCompressedBackendTexture(int width, int height, + const GrBackendFormat&, + const void* data, size_t dataSize, + GrMipmapped, + GrProtected = GrProtected::kNo, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr); + + GrBackendTexture createCompressedBackendTexture(int width, int height, + SkTextureCompressionType, + const void* data, size_t dataSize, + GrMipmapped, + GrProtected = GrProtected::kNo, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr); + + /** + * If possible, updates a backend texture filled with the provided color. If the texture is + * mipmapped, all levels of the mip chain will be updated to have the supplied color. The client + * should check the return value to see if the update was successful. The client can pass in a + * finishedProc to be notified when the data has been uploaded by the gpu and the texture can be + * deleted. The client is required to call `submit` to send the upload work to the gpu. + * The finishedProc will always get called even if we failed to create the GrBackendTexture. + * For the Vulkan backend after a successful update the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + bool updateCompressedBackendTexture(const GrBackendTexture&, + const SkColor4f& color, + GrGpuFinishedProc finishedProc, + GrGpuFinishedContext finishedContext); + + /** + * If possible, updates a backend texture filled with the provided raw data. The client + * should check the return value to see if the update was successful. The client can pass in a + * finishedProc to be notified when the data has been uploaded by the gpu and the texture can be + * deleted. The client is required to call `submit` to send the upload work to the gpu. + * The finishedProc will always get called even if we failed to create the GrBackendTexture. + * If a mipmapped texture is passed in, the data for all the mipmap levels must be provided. + * Additionally, all the miplevels must be sized correctly (please see + * SkMipMap::ComputeLevelSize and ComputeLevelCount). + * For the Vulkan backend after a successful update the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + bool updateCompressedBackendTexture(const GrBackendTexture&, + const void* data, + size_t dataSize, + GrGpuFinishedProc finishedProc, + GrGpuFinishedContext finishedContext); + + /** + * Updates the state of the GrBackendTexture/RenderTarget to have the passed in + * skgpu::MutableTextureState. All objects that wrap the backend surface (i.e. SkSurfaces and + * SkImages) will also be aware of this state change. This call does not submit the state change + * to the gpu, but requires the client to call `submit` to send it to the GPU. The work + * for this call is ordered linearly with all other calls that require GrContext::submit to be + * called (e.g updateBackendTexture and flush). If finishedProc is not null then it will be + * called with finishedContext after the state transition is known to have occurred on the GPU. + * + * See skgpu::MutableTextureState to see what state can be set via this call. + * + * If the backend API is Vulkan, the caller can set the skgpu::MutableTextureState's + * VkImageLayout to VK_IMAGE_LAYOUT_UNDEFINED or queueFamilyIndex to VK_QUEUE_FAMILY_IGNORED to + * tell Skia to not change those respective states. + * + * If previousState is not null and this returns true, then Skia will have filled in + * previousState to have the values of the state before this call. + */ + bool setBackendTextureState(const GrBackendTexture&, + const skgpu::MutableTextureState&, + skgpu::MutableTextureState* previousState = nullptr, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr); + bool setBackendRenderTargetState(const GrBackendRenderTarget&, + const skgpu::MutableTextureState&, + skgpu::MutableTextureState* previousState = nullptr, + GrGpuFinishedProc finishedProc = nullptr, + GrGpuFinishedContext finishedContext = nullptr); + + void deleteBackendTexture(GrBackendTexture); + + // This interface allows clients to pre-compile shaders and populate the runtime program cache. + // The key and data blobs should be the ones passed to the PersistentCache, in SkSL format. + // + // Steps to use this API: + // + // 1) Create a GrDirectContext as normal, but set fPersistentCache on GrContextOptions to + // something that will save the cached shader blobs. Set fShaderCacheStrategy to kSkSL. This + // will ensure that the blobs are SkSL, and are suitable for pre-compilation. + // 2) Run your application, and save all of the key/data pairs that are fed to the cache. + // + // 3) Switch over to shipping your application. Include the key/data pairs from above. + // 4) At startup (or any convenient time), call precompileShader for each key/data pair. + // This will compile the SkSL to create a GL program, and populate the runtime cache. + // + // This is only guaranteed to work if the context/device used in step #2 are created in the + // same way as the one used in step #4, and the same GrContextOptions are specified. + // Using cached shader blobs on a different device or driver are undefined. + bool precompileShader(const SkData& key, const SkData& data); + +#ifdef SK_ENABLE_DUMP_GPU + /** Returns a string with detailed information about the context & GPU, in JSON format. */ + SkString dump() const; +#endif + + class DirectContextID { + public: + static GrDirectContext::DirectContextID Next(); + + DirectContextID() : fID(SK_InvalidUniqueID) {} + + bool operator==(const DirectContextID& that) const { return fID == that.fID; } + bool operator!=(const DirectContextID& that) const { return !(*this == that); } + + void makeInvalid() { fID = SK_InvalidUniqueID; } + bool isValid() const { return fID != SK_InvalidUniqueID; } + + private: + constexpr DirectContextID(uint32_t id) : fID(id) {} + uint32_t fID; + }; + + DirectContextID directContextID() const { return fDirectContextID; } + + // Provides access to functions that aren't part of the public API. + GrDirectContextPriv priv(); + const GrDirectContextPriv priv() const; // NOLINT(readability-const-return-type) + +protected: + GrDirectContext(GrBackendApi backend, const GrContextOptions& options); + + bool init() override; + + GrAtlasManager* onGetAtlasManager() { return fAtlasManager.get(); } +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + skgpu::ganesh::SmallPathAtlasMgr* onGetSmallPathAtlasMgr(); +#endif + + GrDirectContext* asDirectContext() override { return this; } + +private: + // This call will make sure out work on the GPU is finished and will execute any outstanding + // asynchronous work (e.g. calling finished procs, freeing resources, etc.) related to the + // outstanding work on the gpu. The main use currently for this function is when tearing down or + // abandoning the context. + // + // When we finish up work on the GPU it could trigger callbacks to the client. In the case we + // are abandoning the context we don't want the client to be able to use the GrDirectContext to + // issue more commands during the callback. Thus before calling this function we set the + // GrDirectContext's state to be abandoned. However, we need to be able to get by the abaonded + // check in the call to know that it is safe to execute this. The shouldExecuteWhileAbandoned + // bool is used for this signal. + void syncAllOutstandingGpuWork(bool shouldExecuteWhileAbandoned); + + // This delete callback needs to be the first thing on the GrDirectContext so that it is the + // last thing destroyed. The callback may signal the client to clean up things that may need + // to survive the lifetime of some of the other objects on the GrDirectCotnext. So make sure + // we don't call it until all else has been destroyed. + class DeleteCallbackHelper { + public: + DeleteCallbackHelper(GrDirectContextDestroyedContext context, + GrDirectContextDestroyedProc proc) + : fContext(context), fProc(proc) {} + + ~DeleteCallbackHelper() { + if (fProc) { + fProc(fContext); + } + } + + private: + GrDirectContextDestroyedContext fContext; + GrDirectContextDestroyedProc fProc; + }; + std::unique_ptr fDeleteCallbackHelper; + + const DirectContextID fDirectContextID; + // fTaskGroup must appear before anything that uses it (e.g. fGpu), so that it is destroyed + // after all of its users. Clients of fTaskGroup will generally want to ensure that they call + // wait() on it as they are being destroyed, to avoid the possibility of pending tasks being + // invoked after objects they depend upon have already been destroyed. + std::unique_ptr fTaskGroup; + std::unique_ptr fStrikeCache; + sk_sp fGpu; + std::unique_ptr fResourceCache; + std::unique_ptr fResourceProvider; + + // This is incremented before we start calling ReleaseProcs from GrSurfaces and decremented + // after. A ReleaseProc may trigger code causing another resource to get freed so we to track + // the count to know if we in a ReleaseProc at any level. When this is set to a value greated + // than zero we will not allow abandonContext calls to be made on the context. + int fInsideReleaseProcCnt = 0; + + bool fDidTestPMConversions; + // true if the PM/UPM conversion succeeded; false otherwise + bool fPMUPMConversionsRoundTrip; + + GrContextOptions::PersistentCache* fPersistentCache; + + std::unique_ptr fMappedBufferManager; + std::unique_ptr fAtlasManager; + +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + std::unique_ptr fSmallPathAtlasMgr; +#endif + + friend class GrDirectContextPriv; +}; + + +#endif diff --git a/gfx/skia/skia/include/gpu/GrDriverBugWorkarounds.h b/gfx/skia/skia/include/gpu/GrDriverBugWorkarounds.h new file mode 100644 index 0000000000..1aa995c791 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrDriverBugWorkarounds.h @@ -0,0 +1,53 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrDriverBugWorkarounds_DEFINED +#define GrDriverBugWorkarounds_DEFINED + +// External embedders of Skia can override this to use their own list +// of workaround names. +#ifdef SK_GPU_WORKAROUNDS_HEADER +#include SK_GPU_WORKAROUNDS_HEADER +#else +// To regenerate this file, set gn arg "skia_generate_workarounds = true" +// or invoke `bazel run //tools:generate_workarounds` +// This is not rebuilt by default to avoid embedders having to have extra +// build steps. +#include "include/gpu/GrDriverBugWorkaroundsAutogen.h" +#endif + +#include "include/core/SkTypes.h" + +#include +#include + +enum GrDriverBugWorkaroundType { +#define GPU_OP(type, name) type, + GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP) +#undef GPU_OP + NUMBER_OF_GPU_DRIVER_BUG_WORKAROUND_TYPES +}; + +class SK_API GrDriverBugWorkarounds { + public: + GrDriverBugWorkarounds(); + GrDriverBugWorkarounds(const GrDriverBugWorkarounds&) = default; + explicit GrDriverBugWorkarounds(const std::vector& workarounds); + + GrDriverBugWorkarounds& operator=(const GrDriverBugWorkarounds&) = default; + + // Turn on any workarounds listed in |workarounds| (but don't turn any off). + void applyOverrides(const GrDriverBugWorkarounds& workarounds); + + ~GrDriverBugWorkarounds(); + +#define GPU_OP(type, name) bool name = false; + GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP) +#undef GPU_OP +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/GrDriverBugWorkaroundsAutogen.h b/gfx/skia/skia/include/gpu/GrDriverBugWorkaroundsAutogen.h new file mode 100644 index 0000000000..d0b96ca80a --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrDriverBugWorkaroundsAutogen.h @@ -0,0 +1,43 @@ +// Copyright 2018 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +// This file is auto-generated from build_workaround_header.py +// DO NOT EDIT! + +#define GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP) \ + GPU_OP(ADD_AND_TRUE_TO_LOOP_CONDITION, \ + add_and_true_to_loop_condition) \ + GPU_OP(DISABLE_BLEND_EQUATION_ADVANCED, \ + disable_blend_equation_advanced) \ + GPU_OP(DISABLE_DISCARD_FRAMEBUFFER, \ + disable_discard_framebuffer) \ + GPU_OP(DISABLE_DUAL_SOURCE_BLENDING_SUPPORT, \ + disable_dual_source_blending_support) \ + GPU_OP(DISABLE_TEXTURE_STORAGE, \ + disable_texture_storage) \ + GPU_OP(DISALLOW_LARGE_INSTANCED_DRAW, \ + disallow_large_instanced_draw) \ + GPU_OP(EMULATE_ABS_INT_FUNCTION, \ + emulate_abs_int_function) \ + GPU_OP(FLUSH_ON_FRAMEBUFFER_CHANGE, \ + flush_on_framebuffer_change) \ + GPU_OP(FORCE_UPDATE_SCISSOR_STATE_WHEN_BINDING_FBO0, \ + force_update_scissor_state_when_binding_fbo0) \ + GPU_OP(GL_CLEAR_BROKEN, \ + gl_clear_broken) \ + GPU_OP(MAX_FRAGMENT_UNIFORM_VECTORS_32, \ + max_fragment_uniform_vectors_32) \ + GPU_OP(MAX_MSAA_SAMPLE_COUNT_4, \ + max_msaa_sample_count_4) \ + GPU_OP(PACK_PARAMETERS_WORKAROUND_WITH_PACK_BUFFER, \ + pack_parameters_workaround_with_pack_buffer) \ + GPU_OP(REMOVE_POW_WITH_CONSTANT_EXPONENT, \ + remove_pow_with_constant_exponent) \ + GPU_OP(REWRITE_DO_WHILE_LOOPS, \ + rewrite_do_while_loops) \ + GPU_OP(UNBIND_ATTACHMENTS_ON_BOUND_RENDER_FBO_DELETE, \ + unbind_attachments_on_bound_render_fbo_delete) \ + GPU_OP(UNFOLD_SHORT_CIRCUIT_AS_TERNARY_OPERATION, \ + unfold_short_circuit_as_ternary_operation) \ +// The End diff --git a/gfx/skia/skia/include/gpu/GrRecordingContext.h b/gfx/skia/skia/include/gpu/GrRecordingContext.h new file mode 100644 index 0000000000..b7bd6af920 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrRecordingContext.h @@ -0,0 +1,286 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrRecordingContext_DEFINED +#define GrRecordingContext_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTArray.h" +#include "include/private/gpu/ganesh/GrImageContext.h" + +#if GR_GPU_STATS && GR_TEST_UTILS +#include +#include +#endif + +class GrAuditTrail; +class GrBackendFormat; +class GrDrawingManager; +class GrOnFlushCallbackObject; +class GrMemoryPool; +class GrProgramDesc; +class GrProgramInfo; +class GrProxyProvider; +class GrRecordingContextPriv; +class GrSurfaceProxy; +class GrThreadSafeCache; +class SkArenaAlloc; +class SkCapabilities; +class SkJSONWriter; + +namespace sktext::gpu { +class SubRunAllocator; +class TextBlobRedrawCoordinator; +} + +#if GR_TEST_UTILS +class SkString; +#endif + +class GrRecordingContext : public GrImageContext { +public: + ~GrRecordingContext() override; + + SK_API GrBackendFormat defaultBackendFormat(SkColorType ct, GrRenderable renderable) const { + return INHERITED::defaultBackendFormat(ct, renderable); + } + + /** + * Reports whether the GrDirectContext associated with this GrRecordingContext is abandoned. + * When called on a GrDirectContext it may actively check whether the underlying 3D API + * device/context has been disconnected before reporting the status. If so, calling this + * method will transition the GrDirectContext to the abandoned state. + */ + bool abandoned() override { return INHERITED::abandoned(); } + + /* + * Can a SkSurface be created with the given color type. To check whether MSAA is supported + * use maxSurfaceSampleCountForColorType(). + */ + SK_API bool colorTypeSupportedAsSurface(SkColorType colorType) const { + if (kR16G16_unorm_SkColorType == colorType || + kA16_unorm_SkColorType == colorType || + kA16_float_SkColorType == colorType || + kR16G16_float_SkColorType == colorType || + kR16G16B16A16_unorm_SkColorType == colorType || + kGray_8_SkColorType == colorType) { + return false; + } + + return this->maxSurfaceSampleCountForColorType(colorType) > 0; + } + + /** + * Gets the maximum supported texture size. + */ + SK_API int maxTextureSize() const; + + /** + * Gets the maximum supported render target size. + */ + SK_API int maxRenderTargetSize() const; + + /** + * Can a SkImage be created with the given color type. + */ + SK_API bool colorTypeSupportedAsImage(SkColorType) const; + + /** + * Gets the maximum supported sample count for a color type. 1 is returned if only non-MSAA + * rendering is supported for the color type. 0 is returned if rendering to this color type + * is not supported at all. + */ + SK_API int maxSurfaceSampleCountForColorType(SkColorType colorType) const { + return INHERITED::maxSurfaceSampleCountForColorType(colorType); + } + + SK_API sk_sp skCapabilities() const; + + // Provides access to functions that aren't part of the public API. + GrRecordingContextPriv priv(); + const GrRecordingContextPriv priv() const; // NOLINT(readability-const-return-type) + + // The collection of specialized memory arenas for different types of data recorded by a + // GrRecordingContext. Arenas does not maintain ownership of the pools it groups together. + class Arenas { + public: + Arenas(SkArenaAlloc*, sktext::gpu::SubRunAllocator*); + + // For storing pipelines and other complex data as-needed by ops + SkArenaAlloc* recordTimeAllocator() { return fRecordTimeAllocator; } + + // For storing GrTextBlob SubRuns + sktext::gpu::SubRunAllocator* recordTimeSubRunAllocator() { + return fRecordTimeSubRunAllocator; + } + + private: + SkArenaAlloc* fRecordTimeAllocator; + sktext::gpu::SubRunAllocator* fRecordTimeSubRunAllocator; + }; + +protected: + friend class GrRecordingContextPriv; // for hidden functions + friend class SkDeferredDisplayList; // for OwnedArenas + friend class SkDeferredDisplayListPriv; // for ProgramData + + // Like Arenas, but preserves ownership of the underlying pools. + class OwnedArenas { + public: + OwnedArenas(bool ddlRecording); + ~OwnedArenas(); + + Arenas get(); + + OwnedArenas& operator=(OwnedArenas&&); + + private: + bool fDDLRecording; + std::unique_ptr fRecordTimeAllocator; + std::unique_ptr fRecordTimeSubRunAllocator; + }; + + GrRecordingContext(sk_sp, bool ddlRecording); + + bool init() override; + + void abandonContext() override; + + GrDrawingManager* drawingManager(); + + // There is no going back from this method. It should only be called to control the timing + // during abandon or destruction of the context. + void destroyDrawingManager(); + + Arenas arenas() { return fArenas.get(); } + // This entry point should only be used for DDL creation where we want the ops' lifetime to + // match that of the DDL. + OwnedArenas&& detachArenas(); + + GrProxyProvider* proxyProvider() { return fProxyProvider.get(); } + const GrProxyProvider* proxyProvider() const { return fProxyProvider.get(); } + + struct ProgramData { + ProgramData(std::unique_ptr, const GrProgramInfo*); + ProgramData(ProgramData&&); // for SkTArray + ProgramData(const ProgramData&) = delete; + ~ProgramData(); + + const GrProgramDesc& desc() const { return *fDesc; } + const GrProgramInfo& info() const { return *fInfo; } + + private: + // TODO: store the GrProgramDescs in the 'fRecordTimeData' arena + std::unique_ptr fDesc; + // The program infos should be stored in 'fRecordTimeData' so do not need to be ref + // counted or deleted in the destructor. + const GrProgramInfo* fInfo = nullptr; + }; + + // This entry point gives the recording context a chance to cache the provided + // programInfo. The DDL context takes this opportunity to store programInfos as a sidecar + // to the DDL. + virtual void recordProgramInfo(const GrProgramInfo*) {} + // This asks the recording context to return any programInfos it may have collected + // via the 'recordProgramInfo' call. It is up to the caller to ensure that the lifetime + // of the programInfos matches the intended use. For example, in DDL-record mode it + // is known that all the programInfos will have been allocated in an arena with the + // same lifetime at the DDL itself. + virtual void detachProgramData(SkTArray*) {} + + sktext::gpu::TextBlobRedrawCoordinator* getTextBlobRedrawCoordinator(); + const sktext::gpu::TextBlobRedrawCoordinator* getTextBlobRedrawCoordinator() const; + + GrThreadSafeCache* threadSafeCache(); + const GrThreadSafeCache* threadSafeCache() const; + + /** + * Registers an object for flush-related callbacks. (See GrOnFlushCallbackObject.) + * + * NOTE: the drawing manager tracks this object as a raw pointer; it is up to the caller to + * ensure its lifetime is tied to that of the context. + */ + void addOnFlushCallbackObject(GrOnFlushCallbackObject*); + + GrRecordingContext* asRecordingContext() override { return this; } + + class Stats { + public: + Stats() = default; + +#if GR_GPU_STATS + void reset() { *this = {}; } + + int numPathMasksGenerated() const { return fNumPathMasksGenerated; } + void incNumPathMasksGenerated() { fNumPathMasksGenerated++; } + + int numPathMaskCacheHits() const { return fNumPathMaskCacheHits; } + void incNumPathMasksCacheHits() { fNumPathMaskCacheHits++; } + +#if GR_TEST_UTILS + void dump(SkString* out) const; + void dumpKeyValuePairs(SkTArray* keys, SkTArray* values) const; +#endif + + private: + int fNumPathMasksGenerated{0}; + int fNumPathMaskCacheHits{0}; + +#else // GR_GPU_STATS + void incNumPathMasksGenerated() {} + void incNumPathMasksCacheHits() {} + +#if GR_TEST_UTILS + void dump(SkString*) const {} + void dumpKeyValuePairs(SkTArray* keys, SkTArray* values) const {} +#endif +#endif // GR_GPU_STATS + } fStats; + +#if GR_GPU_STATS && GR_TEST_UTILS + struct DMSAAStats { + void dumpKeyValuePairs(SkTArray* keys, SkTArray* values) const; + void dump() const; + void merge(const DMSAAStats&); + int fNumRenderPasses = 0; + int fNumMultisampleRenderPasses = 0; + std::map fTriggerCounts; + }; + + DMSAAStats fDMSAAStats; +#endif + + Stats* stats() { return &fStats; } + const Stats* stats() const { return &fStats; } + void dumpJSON(SkJSONWriter*) const; + +protected: + // Delete last in case other objects call it during destruction. + std::unique_ptr fAuditTrail; + +private: + OwnedArenas fArenas; + + std::unique_ptr fDrawingManager; + std::unique_ptr fProxyProvider; + +#if GR_TEST_UTILS + int fSuppressWarningMessages = 0; +#endif + + using INHERITED = GrImageContext; +}; + +/** + * Safely cast a possibly-null base context to direct context. + */ +static inline GrDirectContext* GrAsDirectContext(GrContext_Base* base) { + return base ? base->asDirectContext() : nullptr; +} + +#endif diff --git a/gfx/skia/skia/include/gpu/GrSurfaceInfo.h b/gfx/skia/skia/include/gpu/GrSurfaceInfo.h new file mode 100644 index 0000000000..e037fb4957 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrSurfaceInfo.h @@ -0,0 +1,166 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrSurfaceInfo_DEFINED +#define GrSurfaceInfo_DEFINED + +#include "include/gpu/GrTypes.h" + +#ifdef SK_GL +#include "include/private/gpu/ganesh/GrGLTypesPriv.h" +#endif +#ifdef SK_VULKAN +#include "include/private/gpu/ganesh/GrVkTypesPriv.h" +#endif +#ifdef SK_DIRECT3D +#include "include/private/gpu/ganesh/GrD3DTypesMinimal.h" +struct GrD3DSurfaceInfo; +#endif +#ifdef SK_METAL +#include "include/private/gpu/ganesh/GrMtlTypesPriv.h" +#endif +#ifdef SK_DAWN +#include "include/private/gpu/ganesh/GrDawnTypesPriv.h" +#endif +#include "include/private/gpu/ganesh/GrMockTypesPriv.h" + +class GrSurfaceInfo { +public: + GrSurfaceInfo() {} +#ifdef SK_GL + GrSurfaceInfo(const GrGLSurfaceInfo& glInfo) + : fBackend(GrBackendApi::kOpenGL) + , fValid(true) + , fSampleCount(glInfo.fSampleCount) + , fLevelCount(glInfo.fLevelCount) + , fProtected(glInfo.fProtected) + , fGLSpec(glInfo) {} +#endif +#ifdef SK_VULKAN + GrSurfaceInfo(const GrVkSurfaceInfo& vkInfo) + : fBackend(GrBackendApi::kVulkan) + , fValid(true) + , fSampleCount(vkInfo.fSampleCount) + , fLevelCount(vkInfo.fLevelCount) + , fProtected(vkInfo.fProtected) + , fVkSpec(vkInfo) {} +#endif +#ifdef SK_DIRECT3D + GrSurfaceInfo(const GrD3DSurfaceInfo& d3dInfo); +#endif +#ifdef SK_METAL + GrSurfaceInfo(const GrMtlSurfaceInfo& mtlInfo) + : fBackend(GrBackendApi::kMetal) + , fValid(true) + , fSampleCount(mtlInfo.fSampleCount) + , fLevelCount(mtlInfo.fLevelCount) + , fProtected(mtlInfo.fProtected) + , fMtlSpec(mtlInfo) {} +#endif +#ifdef SK_DAWN + GrSurfaceInfo(const GrDawnSurfaceInfo& dawnInfo) + : fBackend(GrBackendApi::kDawn) + , fValid(true) + , fSampleCount(dawnInfo.fSampleCount) + , fLevelCount(dawnInfo.fLevelCount) + , fProtected(dawnInfo.fProtected) + , fDawnSpec(dawnInfo) {} +#endif + GrSurfaceInfo(const GrMockSurfaceInfo& mockInfo) + : fBackend(GrBackendApi::kMock) + , fValid(true) + , fSampleCount(mockInfo.fSampleCount) + , fLevelCount(mockInfo.fLevelCount) + , fProtected(mockInfo.fProtected) + , fMockSpec(mockInfo) {} + + ~GrSurfaceInfo(); + GrSurfaceInfo(const GrSurfaceInfo&) = default; + + bool isValid() const { return fValid; } + GrBackendApi backend() const { return fBackend; } + + uint32_t numSamples() const { return fSampleCount; } + uint32_t numMipLevels() const { return fLevelCount; } + GrProtected isProtected() const { return fProtected; } + +#ifdef SK_GL + bool getGLSurfaceInfo(GrGLSurfaceInfo* info) const { + if (!this->isValid() || fBackend != GrBackendApi::kOpenGL) { + return false; + } + *info = GrGLTextureSpecToSurfaceInfo(fGLSpec, fSampleCount, fLevelCount, fProtected); + return true; + } +#endif +#ifdef SK_VULKAN + bool getVkSurfaceInfo(GrVkSurfaceInfo* info) const { + if (!this->isValid() || fBackend != GrBackendApi::kVulkan) { + return false; + } + *info = GrVkImageSpecToSurfaceInfo(fVkSpec, fSampleCount, fLevelCount, fProtected); + return true; + } +#endif +#ifdef SK_DIRECT3D + bool getD3DSurfaceInfo(GrD3DSurfaceInfo*) const; +#endif +#ifdef SK_METAL + bool getMtlSurfaceInfo(GrMtlSurfaceInfo* info) const { + if (!this->isValid() || fBackend != GrBackendApi::kMetal) { + return false; + } + *info = GrMtlTextureSpecToSurfaceInfo(fMtlSpec, fSampleCount, fLevelCount, fProtected); + return true; + } +#endif +#ifdef SK_DAWN + bool getDawnSurfaceInfo(GrDawnSurfaceInfo* info) const { + if (!this->isValid() || fBackend != GrBackendApi::kDawn) { + return false; + } + *info = GrDawnTextureSpecToSurfaceInfo(fDawnSpec, fSampleCount, fLevelCount, fProtected); + return true; + } +#endif + bool getMockSurfaceInfo(GrMockSurfaceInfo* info) const { + if (!this->isValid() || fBackend != GrBackendApi::kMock) { + return false; + } + *info = GrMockTextureSpecToSurfaceInfo(fMockSpec, fSampleCount, fLevelCount, fProtected); + return true; + } + +private: + GrBackendApi fBackend = GrBackendApi::kMock; + bool fValid = false; + + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + GrProtected fProtected = GrProtected::kNo; + + union { +#ifdef SK_GL + GrGLTextureSpec fGLSpec; +#endif +#ifdef SK_VULKAN + GrVkImageSpec fVkSpec; +#endif +#ifdef SK_DIRECT3D + GrD3DTextureResourceSpecHolder fD3DSpec; +#endif +#ifdef SK_METAL + GrMtlTextureSpec fMtlSpec; +#endif +#ifdef SK_DAWN + GrDawnTextureSpec fDawnSpec; +#endif + GrMockTextureSpec fMockSpec; + }; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/GrTypes.h b/gfx/skia/skia/include/gpu/GrTypes.h new file mode 100644 index 0000000000..177a35a943 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrTypes.h @@ -0,0 +1,244 @@ +/* + * Copyright 2010 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrTypes_DEFINED +#define GrTypes_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" // IWYU pragma: keep + +#include +#include +class GrBackendSemaphore; + +namespace skgpu { +enum class Mipmapped : bool; +enum class Protected : bool; +enum class Renderable : bool; +} + +//////////////////////////////////////////////////////////////////////////////// + +/** + * Wraps a C++11 enum that we use as a bitfield, and enables a limited amount of + * masking with type safety. Instantiated with the ~ operator. + */ +template class GrTFlagsMask { +public: + constexpr explicit GrTFlagsMask(TFlags value) : GrTFlagsMask(static_cast(value)) {} + constexpr explicit GrTFlagsMask(int value) : fValue(value) {} + constexpr int value() const { return fValue; } +private: + const int fValue; +}; + +/** + * Defines bitwise operators that make it possible to use an enum class as a + * basic bitfield. + */ +#define GR_MAKE_BITFIELD_CLASS_OPS(X) \ + [[maybe_unused]] constexpr GrTFlagsMask operator~(X a) { \ + return GrTFlagsMask(~static_cast(a)); \ + } \ + [[maybe_unused]] constexpr X operator|(X a, X b) { \ + return static_cast(static_cast(a) | static_cast(b)); \ + } \ + [[maybe_unused]] inline X& operator|=(X& a, X b) { \ + return (a = a | b); \ + } \ + [[maybe_unused]] constexpr bool operator&(X a, X b) { \ + return SkToBool(static_cast(a) & static_cast(b)); \ + } \ + [[maybe_unused]] constexpr GrTFlagsMask operator|(GrTFlagsMask a, GrTFlagsMask b) { \ + return GrTFlagsMask(a.value() | b.value()); \ + } \ + [[maybe_unused]] constexpr GrTFlagsMask operator|(GrTFlagsMask a, X b) { \ + return GrTFlagsMask(a.value() | static_cast(b)); \ + } \ + [[maybe_unused]] constexpr GrTFlagsMask operator|(X a, GrTFlagsMask b) { \ + return GrTFlagsMask(static_cast(a) | b.value()); \ + } \ + [[maybe_unused]] constexpr X operator&(GrTFlagsMask a, GrTFlagsMask b) { \ + return static_cast(a.value() & b.value()); \ + } \ + [[maybe_unused]] constexpr X operator&(GrTFlagsMask a, X b) { \ + return static_cast(a.value() & static_cast(b)); \ + } \ + [[maybe_unused]] constexpr X operator&(X a, GrTFlagsMask b) { \ + return static_cast(static_cast(a) & b.value()); \ + } \ + [[maybe_unused]] inline X& operator&=(X& a, GrTFlagsMask b) { \ + return (a = a & b); \ + } \ + +#define GR_DECL_BITFIELD_CLASS_OPS_FRIENDS(X) \ + friend constexpr GrTFlagsMask operator ~(X); \ + friend constexpr X operator |(X, X); \ + friend X& operator |=(X&, X); \ + friend constexpr bool operator &(X, X); \ + friend constexpr GrTFlagsMask operator|(GrTFlagsMask, GrTFlagsMask); \ + friend constexpr GrTFlagsMask operator|(GrTFlagsMask, X); \ + friend constexpr GrTFlagsMask operator|(X, GrTFlagsMask); \ + friend constexpr X operator&(GrTFlagsMask, GrTFlagsMask); \ + friend constexpr X operator&(GrTFlagsMask, X); \ + friend constexpr X operator&(X, GrTFlagsMask); \ + friend X& operator &=(X&, GrTFlagsMask) + +/////////////////////////////////////////////////////////////////////////////// + +/** + * Possible 3D APIs that may be used by Ganesh. + */ +enum class GrBackendApi : unsigned { + kOpenGL, + kVulkan, + kMetal, + kDirect3D, + kDawn, + /** + * Mock is a backend that does not draw anything. It is used for unit tests + * and to measure CPU overhead. + */ + kMock, + + /** + * Added here to support the legacy GrBackend enum value and clients who referenced it using + * GrBackend::kOpenGL_GrBackend. + */ + kOpenGL_GrBackend = kOpenGL, +}; + +/** + * Previously the above enum was not an enum class but a normal enum. To support the legacy use of + * the enum values we define them below so that no clients break. + */ +typedef GrBackendApi GrBackend; + +static constexpr GrBackendApi kMetal_GrBackend = GrBackendApi::kMetal; +static constexpr GrBackendApi kVulkan_GrBackend = GrBackendApi::kVulkan; +static constexpr GrBackendApi kMock_GrBackend = GrBackendApi::kMock; + +/////////////////////////////////////////////////////////////////////////////// + +/** + * Used to say whether a texture has mip levels allocated or not. + */ +/** Deprecated legacy alias of skgpu::Mipmapped. */ +using GrMipmapped = skgpu::Mipmapped; +/** Deprecated legacy alias of skgpu::Mipmapped. */ +using GrMipMapped = skgpu::Mipmapped; + +/* + * Can a GrBackendObject be rendered to? + */ +using GrRenderable = skgpu::Renderable; + +/* + * Used to say whether texture is backed by protected memory. + */ +using GrProtected = skgpu::Protected; + +/////////////////////////////////////////////////////////////////////////////// + +/** + * GPU SkImage and SkSurfaces can be stored such that (0, 0) in texture space may correspond to + * either the top-left or bottom-left content pixel. + */ +enum GrSurfaceOrigin : int { + kTopLeft_GrSurfaceOrigin, + kBottomLeft_GrSurfaceOrigin, +}; + +/** + * A GrContext's cache of backend context state can be partially invalidated. + * These enums are specific to the GL backend and we'd add a new set for an alternative backend. + */ +enum GrGLBackendState { + kRenderTarget_GrGLBackendState = 1 << 0, + // Also includes samplers bound to texture units. + kTextureBinding_GrGLBackendState = 1 << 1, + // View state stands for scissor and viewport + kView_GrGLBackendState = 1 << 2, + kBlend_GrGLBackendState = 1 << 3, + kMSAAEnable_GrGLBackendState = 1 << 4, + kVertex_GrGLBackendState = 1 << 5, + kStencil_GrGLBackendState = 1 << 6, + kPixelStore_GrGLBackendState = 1 << 7, + kProgram_GrGLBackendState = 1 << 8, + kFixedFunction_GrGLBackendState = 1 << 9, + kMisc_GrGLBackendState = 1 << 10, + kALL_GrGLBackendState = 0xffff +}; + +/** + * This value translates to reseting all the context state for any backend. + */ +static const uint32_t kAll_GrBackendState = 0xffffffff; + +typedef void* GrGpuFinishedContext; +typedef void (*GrGpuFinishedProc)(GrGpuFinishedContext finishedContext); + +typedef void* GrGpuSubmittedContext; +typedef void (*GrGpuSubmittedProc)(GrGpuSubmittedContext submittedContext, bool success); + +typedef void* GrDirectContextDestroyedContext; +typedef void (*GrDirectContextDestroyedProc)(GrDirectContextDestroyedContext destroyedContext); + +/** + * Struct to supply options to flush calls. + * + * After issuing all commands, fNumSemaphore semaphores will be signaled by the gpu. The client + * passes in an array of fNumSemaphores GrBackendSemaphores. In general these GrBackendSemaphore's + * can be either initialized or not. If they are initialized, the backend uses the passed in + * semaphore. If it is not initialized, a new semaphore is created and the GrBackendSemaphore + * object is initialized with that semaphore. The semaphores are not sent to the GPU until the next + * GrContext::submit call is made. See the GrContext::submit for more information. + * + * The client will own and be responsible for deleting the underlying semaphores that are stored + * and returned in initialized GrBackendSemaphore objects. The GrBackendSemaphore objects + * themselves can be deleted as soon as this function returns. + * + * If a finishedProc is provided, the finishedProc will be called when all work submitted to the gpu + * from this flush call and all previous flush calls has finished on the GPU. If the flush call + * fails due to an error and nothing ends up getting sent to the GPU, the finished proc is called + * immediately. + * + * If a submittedProc is provided, the submittedProc will be called when all work from this flush + * call is submitted to the GPU. If the flush call fails due to an error and nothing will get sent + * to the GPU, the submitted proc is called immediately. It is possibly that when work is finally + * submitted, that the submission actual fails. In this case we will not reattempt to do the + * submission. Skia notifies the client of these via the success bool passed into the submittedProc. + * The submittedProc is useful to the client to know when semaphores that were sent with the flush + * have actually been submitted to the GPU so that they can be waited on (or deleted if the submit + * fails). + * Note about GL: In GL work gets sent to the driver immediately during the flush call, but we don't + * really know when the driver sends the work to the GPU. Therefore, we treat the submitted proc as + * we do in other backends. It will be called when the next GrContext::submit is called after the + * flush (or possibly during the flush if there is no work to be done for the flush). The main use + * case for the submittedProc is to know when semaphores have been sent to the GPU and even in GL + * it is required to call GrContext::submit to flush them. So a client should be able to treat all + * backend APIs the same in terms of how the submitted procs are treated. + */ +struct GrFlushInfo { + size_t fNumSemaphores = 0; + GrBackendSemaphore* fSignalSemaphores = nullptr; + GrGpuFinishedProc fFinishedProc = nullptr; + GrGpuFinishedContext fFinishedContext = nullptr; + GrGpuSubmittedProc fSubmittedProc = nullptr; + GrGpuSubmittedContext fSubmittedContext = nullptr; +}; + +/** + * Enum used as return value when flush with semaphores so the client knows whether the valid + * semaphores will be submitted on the next GrContext::submit call. + */ +enum class GrSemaphoresSubmitted : bool { + kNo = false, + kYes = true +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/GrYUVABackendTextures.h b/gfx/skia/skia/include/gpu/GrYUVABackendTextures.h new file mode 100644 index 0000000000..edcde7e533 --- /dev/null +++ b/gfx/skia/skia/include/gpu/GrYUVABackendTextures.h @@ -0,0 +1,124 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrYUVABackendTextures_DEFINED +#define GrYUVABackendTextures_DEFINED + +#include "include/core/SkYUVAInfo.h" +#include "include/gpu/GrBackendSurface.h" + +#include + +/** + * A description of a set GrBackendTextures that hold the planar data described by a SkYUVAInfo. + */ +class SK_API GrYUVABackendTextureInfo { +public: + static constexpr auto kMaxPlanes = SkYUVAInfo::kMaxPlanes; + + /** Default GrYUVABackendTextureInfo is invalid. */ + GrYUVABackendTextureInfo() = default; + + /** + * Initializes a GrYUVABackendTextureInfo to describe a set of textures that can store the + * planes indicated by the SkYUVAInfo. The texture dimensions are taken from the SkYUVAInfo's + * plane dimensions. All the described textures share a common origin. The planar image this + * describes will be mip mapped if all the textures are individually mip mapped as indicated + * by GrMipmapped. This will produce an invalid result (return false from isValid()) if the + * passed formats' channels don't agree with SkYUVAInfo. + */ + GrYUVABackendTextureInfo(const SkYUVAInfo&, + const GrBackendFormat[kMaxPlanes], + GrMipmapped, + GrSurfaceOrigin); + + GrYUVABackendTextureInfo(const GrYUVABackendTextureInfo&) = default; + + GrYUVABackendTextureInfo& operator=(const GrYUVABackendTextureInfo&) = default; + + bool operator==(const GrYUVABackendTextureInfo&) const; + bool operator!=(const GrYUVABackendTextureInfo& that) const { return !(*this == that); } + + const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; } + + SkYUVColorSpace yuvColorSpace() const { return fYUVAInfo.yuvColorSpace(); } + + GrMipmapped mipmapped() const { return fMipmapped; } + + GrSurfaceOrigin textureOrigin() const { return fTextureOrigin; } + + /** The number of SkPixmap planes, 0 if this GrYUVABackendTextureInfo is invalid. */ + int numPlanes() const { return fYUVAInfo.numPlanes(); } + + /** Format of the ith plane, or invalid format if i >= numPlanes() */ + const GrBackendFormat& planeFormat(int i) const { return fPlaneFormats[i]; } + + /** + * Returns true if this has been configured with a valid SkYUVAInfo with compatible texture + * formats. + */ + bool isValid() const { return fYUVAInfo.isValid(); } + + /** + * Computes a YUVALocations representation of the planar layout. The result is guaranteed to be + * valid if this->isValid(). + */ + SkYUVAInfo::YUVALocations toYUVALocations() const; + +private: + SkYUVAInfo fYUVAInfo; + GrBackendFormat fPlaneFormats[kMaxPlanes]; + GrMipmapped fMipmapped = GrMipmapped::kNo; + GrSurfaceOrigin fTextureOrigin = kTopLeft_GrSurfaceOrigin; +}; + +/** + * A set of GrBackendTextures that hold the planar data for an image described a SkYUVAInfo. + */ +class SK_API GrYUVABackendTextures { +public: + GrYUVABackendTextures() = default; + GrYUVABackendTextures(const GrYUVABackendTextures&) = delete; + GrYUVABackendTextures(GrYUVABackendTextures&&) = default; + + GrYUVABackendTextures& operator=(const GrYUVABackendTextures&) = delete; + GrYUVABackendTextures& operator=(GrYUVABackendTextures&&) = default; + + GrYUVABackendTextures(const SkYUVAInfo&, + const GrBackendTexture[SkYUVAInfo::kMaxPlanes], + GrSurfaceOrigin textureOrigin); + + const std::array& textures() const { + return fTextures; + } + + GrBackendTexture texture(int i) const { + SkASSERT(i >= 0 && i < SkYUVAInfo::kMaxPlanes); + return fTextures[static_cast(i)]; + } + + const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; } + + int numPlanes() const { return fYUVAInfo.numPlanes(); } + + GrSurfaceOrigin textureOrigin() const { return fTextureOrigin; } + + bool isValid() const { return fYUVAInfo.isValid(); } + + /** + * Computes a YUVALocations representation of the planar layout. The result is guaranteed to be + * valid if this->isValid(). + */ + SkYUVAInfo::YUVALocations toYUVALocations() const; + +private: + SkYUVAInfo fYUVAInfo; + std::array fTextures; + GrSurfaceOrigin fTextureOrigin = kTopLeft_GrSurfaceOrigin; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/MutableTextureState.h b/gfx/skia/skia/include/gpu/MutableTextureState.h new file mode 100644 index 0000000000..19b7cd54c6 --- /dev/null +++ b/gfx/skia/skia/include/gpu/MutableTextureState.h @@ -0,0 +1,122 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_MutableTextureState_DEFINED +#define skgpu_MutableTextureState_DEFINED + +#include "include/gpu/GpuTypes.h" + +#ifdef SK_VULKAN +#include "include/private/gpu/vk/VulkanTypesPriv.h" +#endif + +#include + +class GrVkGpu; + +namespace skgpu { + +/** + * Since Skia and clients can both modify gpu textures and their connected state, Skia needs a way + * for clients to inform us if they have modifiend any of this state. In order to not need setters + * for every single API and state, we use this class to be a generic wrapper around all the mutable + * state. This class is used for calls that inform Skia of these texture/image state changes by the + * client as well as for requesting state changes to be done by Skia. The backend specific state + * that is wrapped by this class are: + * + * Vulkan: VkImageLayout and QueueFamilyIndex + */ +class SK_API MutableTextureState { +public: + MutableTextureState() {} + +#ifdef SK_VULKAN + MutableTextureState(VkImageLayout layout, uint32_t queueFamilyIndex) + : fVkState(layout, queueFamilyIndex) + , fBackend(BackendApi::kVulkan) + , fIsValid(true) {} +#endif + + MutableTextureState(const MutableTextureState& that) + : fBackend(that.fBackend), fIsValid(that.fIsValid) { + if (!fIsValid) { + return; + } + switch (fBackend) { + case BackendApi::kVulkan: + #ifdef SK_VULKAN + SkASSERT(that.fBackend == BackendApi::kVulkan); + fVkState = that.fVkState; + #endif + break; + default: + (void)that; + SkUNREACHABLE; + } + } + + MutableTextureState& operator=(const MutableTextureState& that) { + if (this != &that) { + this->~MutableTextureState(); + new (this) MutableTextureState(that); + } + return *this; + } + +#ifdef SK_VULKAN + // If this class is not Vulkan backed it will return value of VK_IMAGE_LAYOUT_UNDEFINED. + // Otherwise it will return the VkImageLayout. + VkImageLayout getVkImageLayout() const { + if (this->isValid() && fBackend != BackendApi::kVulkan) { + return VK_IMAGE_LAYOUT_UNDEFINED; + } + return fVkState.getImageLayout(); + } + + // If this class is not Vulkan backed it will return value of VK_QUEUE_FAMILY_IGNORED. + // Otherwise it will return the VkImageLayout. + uint32_t getQueueFamilyIndex() const { + if (this->isValid() && fBackend != BackendApi::kVulkan) { + return VK_QUEUE_FAMILY_IGNORED; + } + return fVkState.getQueueFamilyIndex(); + } +#endif + + BackendApi backend() const { return fBackend; } + + // Returns true if the backend mutable state has been initialized. + bool isValid() const { return fIsValid; } + +private: + friend class MutableTextureStateRef; + friend class ::GrVkGpu; + +#ifdef SK_VULKAN + void setVulkanState(VkImageLayout layout, uint32_t queueFamilyIndex) { + SkASSERT(!this->isValid() || fBackend == BackendApi::kVulkan); + fVkState.setImageLayout(layout); + fVkState.setQueueFamilyIndex(queueFamilyIndex); + fBackend = BackendApi::kVulkan; + fIsValid = true; + } +#endif + + union { + char fPlaceholder; +#ifdef SK_VULKAN + VulkanMutableTextureState fVkState; +#endif + }; + + BackendApi fBackend = BackendApi::kMock; + bool fIsValid = false; +}; + +} // namespace skgpu + +#endif // skgpu_MutableTextureState_DEFINED diff --git a/gfx/skia/skia/include/gpu/ShaderErrorHandler.h b/gfx/skia/skia/include/gpu/ShaderErrorHandler.h new file mode 100644 index 0000000000..8960da5c5a --- /dev/null +++ b/gfx/skia/skia/include/gpu/ShaderErrorHandler.h @@ -0,0 +1,36 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_ShaderErrorHandler_DEFINED +#define skgpu_ShaderErrorHandler_DEFINED + +#include "include/core/SkTypes.h" + +namespace skgpu { +/** + * Abstract class to report errors when compiling shaders. + */ +class SK_API ShaderErrorHandler { +public: + virtual ~ShaderErrorHandler() = default; + + virtual void compileError(const char* shader, const char* errors) = 0; + +protected: + ShaderErrorHandler() = default; + ShaderErrorHandler(const ShaderErrorHandler&) = delete; + ShaderErrorHandler& operator=(const ShaderErrorHandler&) = delete; +}; + +/** + * Used when no error handler is set. Will report failures via SkDebugf and asserts. + */ +ShaderErrorHandler* DefaultShaderErrorHandler(); + +} // namespace skgpu + +#endif // skgpu_ShaderErrorHandler_DEFINED diff --git a/gfx/skia/skia/include/gpu/d3d/GrD3DBackendContext.h b/gfx/skia/skia/include/gpu/d3d/GrD3DBackendContext.h new file mode 100644 index 0000000000..bb85e52e5c --- /dev/null +++ b/gfx/skia/skia/include/gpu/d3d/GrD3DBackendContext.h @@ -0,0 +1,35 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrD3DBackendContext_DEFINED +#define GrD3DBackendContext_DEFINED + +// GrD3DTypes.h includes d3d12.h, which in turn includes windows.h, which redefines many +// common identifiers such as: +// * interface +// * small +// * near +// * far +// * CreateSemaphore +// * MemoryBarrier +// +// You should only include GrD3DBackendContext.h if you are prepared to rename those identifiers. +#include "include/gpu/d3d/GrD3DTypes.h" + +#include "include/gpu/GrTypes.h" + +// The BackendContext contains all of the base D3D objects needed by the GrD3DGpu. The assumption +// is that the client will set these up and pass them to the GrD3DGpu constructor. +struct SK_API GrD3DBackendContext { + gr_cp fAdapter; + gr_cp fDevice; + gr_cp fQueue; + sk_sp fMemoryAllocator; + GrProtected fProtectedContext = GrProtected::kNo; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/d3d/GrD3DTypes.h b/gfx/skia/skia/include/gpu/d3d/GrD3DTypes.h new file mode 100644 index 0000000000..b595422e86 --- /dev/null +++ b/gfx/skia/skia/include/gpu/d3d/GrD3DTypes.h @@ -0,0 +1,248 @@ + +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrD3DTypes_DEFINED +#define GrD3DTypes_DEFINED + +// This file includes d3d12.h, which in turn includes windows.h, which redefines many +// common identifiers such as: +// * interface +// * small +// * near +// * far +// * CreateSemaphore +// * MemoryBarrier +// +// You should only include this header if you need the Direct3D definitions and are +// prepared to rename those identifiers. + +#include "include/core/SkRefCnt.h" +#include "include/gpu/GpuTypes.h" +#include +#include + +class GrD3DGpu; + + /** Check if the argument is non-null, and if so, call obj->AddRef() and return obj. + */ +template static inline T* GrSafeComAddRef(T* obj) { + if (obj) { + obj->AddRef(); + } + return obj; +} + +/** Check if the argument is non-null, and if so, call obj->Release() + */ +template static inline void GrSafeComRelease(T* obj) { + if (obj) { + obj->Release(); + } +} + +template class gr_cp { +public: + using element_type = T; + + constexpr gr_cp() : fObject(nullptr) {} + constexpr gr_cp(std::nullptr_t) : fObject(nullptr) {} + + /** + * Shares the underlying object by calling AddRef(), so that both the argument and the newly + * created gr_cp both have a reference to it. + */ + gr_cp(const gr_cp& that) : fObject(GrSafeComAddRef(that.get())) {} + + /** + * Move the underlying object from the argument to the newly created gr_cp. Afterwards only + * the new gr_cp will have a reference to the object, and the argument will point to null. + * No call to AddRef() or Release() will be made. + */ + gr_cp(gr_cp&& that) : fObject(that.release()) {} + + /** + * Adopt the bare object into the newly created gr_cp. + * No call to AddRef() or Release() will be made. + */ + explicit gr_cp(T* obj) { + fObject = obj; + } + + /** + * Calls Release() on the underlying object pointer. + */ + ~gr_cp() { + GrSafeComRelease(fObject); + SkDEBUGCODE(fObject = nullptr); + } + + /** + * Shares the underlying object referenced by the argument by calling AddRef() on it. If this + * gr_cp previously had a reference to an object (i.e. not null) it will call Release() + * on that object. + */ + gr_cp& operator=(const gr_cp& that) { + if (this != &that) { + this->reset(GrSafeComAddRef(that.get())); + } + return *this; + } + + /** + * Move the underlying object from the argument to the gr_cp. If the gr_cp + * previously held a reference to another object, Release() will be called on that object. + * No call to AddRef() will be made. + */ + gr_cp& operator=(gr_cp&& that) { + this->reset(that.release()); + return *this; + } + + explicit operator bool() const { return this->get() != nullptr; } + + T* get() const { return fObject; } + T* operator->() const { return fObject; } + T** operator&() { return &fObject; } + + /** + * Adopt the new object, and call Release() on any previously held object (if not null). + * No call to AddRef() will be made. + */ + void reset(T* object = nullptr) { + T* oldObject = fObject; + fObject = object; + GrSafeComRelease(oldObject); + } + + /** + * Shares the new object by calling AddRef() on it. If this gr_cp previously had a + * reference to an object (i.e. not null) it will call Release() on that object. + */ + void retain(T* object) { + if (this->fObject != object) { + this->reset(GrSafeComAddRef(object)); + } + } + + /** + * Return the original object, and set the internal object to nullptr. + * The caller must assume ownership of the object, and manage its reference count directly. + * No call to Release() will be made. + */ + T* SK_WARN_UNUSED_RESULT release() { + T* obj = fObject; + fObject = nullptr; + return obj; + } + +private: + T* fObject; +}; + +template inline bool operator==(const gr_cp& a, + const gr_cp& b) { + return a.get() == b.get(); +} + +template inline bool operator!=(const gr_cp& a, + const gr_cp& b) { + return a.get() != b.get(); +} + +// interface classes for the GPU memory allocator +class GrD3DAlloc : public SkRefCnt { +public: + ~GrD3DAlloc() override = default; +}; + +class GrD3DMemoryAllocator : public SkRefCnt { +public: + virtual gr_cp createResource(D3D12_HEAP_TYPE, const D3D12_RESOURCE_DESC*, + D3D12_RESOURCE_STATES initialResourceState, + sk_sp* allocation, + const D3D12_CLEAR_VALUE*) = 0; + virtual gr_cp createAliasingResource(sk_sp& allocation, + uint64_t localOffset, + const D3D12_RESOURCE_DESC*, + D3D12_RESOURCE_STATES initialResourceState, + const D3D12_CLEAR_VALUE*) = 0; +}; + +// Note: there is no notion of Borrowed or Adopted resources in the D3D backend, +// so Ganesh will ref fResource once it's asked to wrap it. +// Clients are responsible for releasing their own ref to avoid memory leaks. +struct GrD3DTextureResourceInfo { + gr_cp fResource = nullptr; + sk_sp fAlloc = nullptr; + D3D12_RESOURCE_STATES fResourceState = D3D12_RESOURCE_STATE_COMMON; + DXGI_FORMAT fFormat = DXGI_FORMAT_UNKNOWN; + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + unsigned int fSampleQualityPattern = DXGI_STANDARD_MULTISAMPLE_QUALITY_PATTERN; + skgpu::Protected fProtected = skgpu::Protected::kNo; + + GrD3DTextureResourceInfo() = default; + + GrD3DTextureResourceInfo(ID3D12Resource* resource, + const sk_sp alloc, + D3D12_RESOURCE_STATES resourceState, + DXGI_FORMAT format, + uint32_t sampleCount, + uint32_t levelCount, + unsigned int sampleQualityLevel, + skgpu::Protected isProtected = skgpu::Protected::kNo) + : fResource(resource) + , fAlloc(alloc) + , fResourceState(resourceState) + , fFormat(format) + , fSampleCount(sampleCount) + , fLevelCount(levelCount) + , fSampleQualityPattern(sampleQualityLevel) + , fProtected(isProtected) {} + + GrD3DTextureResourceInfo(const GrD3DTextureResourceInfo& info, + D3D12_RESOURCE_STATES resourceState) + : fResource(info.fResource) + , fAlloc(info.fAlloc) + , fResourceState(resourceState) + , fFormat(info.fFormat) + , fSampleCount(info.fSampleCount) + , fLevelCount(info.fLevelCount) + , fSampleQualityPattern(info.fSampleQualityPattern) + , fProtected(info.fProtected) {} + +#if GR_TEST_UTILS + bool operator==(const GrD3DTextureResourceInfo& that) const { + return fResource == that.fResource && fResourceState == that.fResourceState && + fFormat == that.fFormat && fSampleCount == that.fSampleCount && + fLevelCount == that.fLevelCount && + fSampleQualityPattern == that.fSampleQualityPattern && fProtected == that.fProtected; + } +#endif +}; + +struct GrD3DFenceInfo { + GrD3DFenceInfo() + : fFence(nullptr) + , fValue(0) { + } + + gr_cp fFence; + uint64_t fValue; // signal value for the fence +}; + +struct GrD3DSurfaceInfo { + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + skgpu::Protected fProtected = skgpu::Protected::kNo; + + DXGI_FORMAT fFormat = DXGI_FORMAT_UNKNOWN; + unsigned int fSampleQualityPattern = DXGI_STANDARD_MULTISAMPLE_QUALITY_PATTERN; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/dawn/GrDawnTypes.h b/gfx/skia/skia/include/gpu/dawn/GrDawnTypes.h new file mode 100644 index 0000000000..fbd3dbaf55 --- /dev/null +++ b/gfx/skia/skia/include/gpu/dawn/GrDawnTypes.h @@ -0,0 +1,95 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrDawnTypes_DEFINED +#define GrDawnTypes_DEFINED + +#include "include/gpu/GpuTypes.h" + +#ifdef Always +#undef Always +static constexpr int Always = 2; +#endif +#ifdef Success +#undef Success +static constexpr int Success = 0; +#endif +#ifdef None +#undef None +static constexpr int None = 0L; +#endif +#include "webgpu/webgpu_cpp.h" // IWYU pragma: export + +struct GrDawnTextureInfo { + wgpu::Texture fTexture; + wgpu::TextureFormat fFormat; + uint32_t fLevelCount; + GrDawnTextureInfo() : fTexture(nullptr), fFormat(), fLevelCount(0) { + } + GrDawnTextureInfo(const GrDawnTextureInfo& other) + : fTexture(other.fTexture) + , fFormat(other.fFormat) + , fLevelCount(other.fLevelCount) { + } + GrDawnTextureInfo& operator=(const GrDawnTextureInfo& other) { + fTexture = other.fTexture; + fFormat = other.fFormat; + fLevelCount = other.fLevelCount; + return *this; + } + bool operator==(const GrDawnTextureInfo& other) const { + return fTexture.Get() == other.fTexture.Get() && + fFormat == other.fFormat && + fLevelCount == other.fLevelCount; + } +}; + +// GrDawnRenderTargetInfo holds a reference to a (1-mip) TextureView. This means that, for now, +// GrDawnRenderTarget is suitable for rendering, but not readPixels() or writePixels(). Also, +// backdrop filters and certain blend modes requiring copying the destination framebuffer +// will not work. +struct GrDawnRenderTargetInfo { + wgpu::TextureView fTextureView; + wgpu::TextureFormat fFormat; + uint32_t fLevelCount; + GrDawnRenderTargetInfo() : fTextureView(nullptr), fFormat(), fLevelCount(0) { + } + GrDawnRenderTargetInfo(const GrDawnRenderTargetInfo& other) + : fTextureView(other.fTextureView) + , fFormat(other.fFormat) + , fLevelCount(other.fLevelCount) { + } + explicit GrDawnRenderTargetInfo(const GrDawnTextureInfo& texInfo) + : fFormat(texInfo.fFormat) + , fLevelCount(1) { + wgpu::TextureViewDescriptor desc; + desc.format = texInfo.fFormat; + desc.mipLevelCount = 1; + fTextureView = texInfo.fTexture.CreateView(&desc); + } + GrDawnRenderTargetInfo& operator=(const GrDawnRenderTargetInfo& other) { + fTextureView = other.fTextureView; + fFormat = other.fFormat; + fLevelCount = other.fLevelCount; + return *this; + } + bool operator==(const GrDawnRenderTargetInfo& other) const { + return fTextureView.Get() == other.fTextureView.Get() && + fFormat == other.fFormat && + fLevelCount == other.fLevelCount; + } +}; + +struct GrDawnSurfaceInfo { + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + skgpu::Protected fProtected = skgpu::Protected::kNo; + + wgpu::TextureFormat fFormat; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/gl/GrGLAssembleHelpers.h b/gfx/skia/skia/include/gpu/gl/GrGLAssembleHelpers.h new file mode 100644 index 0000000000..bfa2aea376 --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLAssembleHelpers.h @@ -0,0 +1,11 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/gpu/gl/GrGLAssembleInterface.h" + +void GrGetEGLQueryAndDisplay(GrEGLQueryStringFn** queryString, GrEGLDisplay* display, + void* ctx, GrGLGetProc get); diff --git a/gfx/skia/skia/include/gpu/gl/GrGLAssembleInterface.h b/gfx/skia/skia/include/gpu/gl/GrGLAssembleInterface.h new file mode 100644 index 0000000000..4f9f9f9ee0 --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLAssembleInterface.h @@ -0,0 +1,39 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/gpu/gl/GrGLInterface.h" + +typedef GrGLFuncPtr (*GrGLGetProc)(void* ctx, const char name[]); + +/** + * Generic function for creating a GrGLInterface for an either OpenGL or GLES. It calls + * get() to get each function address. ctx is a generic ptr passed to and interpreted by get(). + */ +SK_API sk_sp GrGLMakeAssembledInterface(void *ctx, GrGLGetProc get); + +/** + * Generic function for creating a GrGLInterface for an OpenGL (but not GLES) context. It calls + * get() to get each function address. ctx is a generic ptr passed to and interpreted by get(). + */ +SK_API sk_sp GrGLMakeAssembledGLInterface(void *ctx, GrGLGetProc get); + +/** + * Generic function for creating a GrGLInterface for an OpenGL ES (but not Open GL) context. It + * calls get() to get each function address. ctx is a generic ptr passed to and interpreted by + * get(). + */ +SK_API sk_sp GrGLMakeAssembledGLESInterface(void *ctx, GrGLGetProc get); + +/** + * Generic function for creating a GrGLInterface for a WebGL (similar to OpenGL ES) context. It + * calls get() to get each function address. ctx is a generic ptr passed to and interpreted by + * get(). + */ +SK_API sk_sp GrGLMakeAssembledWebGLInterface(void *ctx, GrGLGetProc get); + +/** Deprecated version of GrGLMakeAssembledInterface() that returns a bare pointer. */ +SK_API const GrGLInterface* GrGLAssembleInterface(void *ctx, GrGLGetProc get); diff --git a/gfx/skia/skia/include/gpu/gl/GrGLConfig.h b/gfx/skia/skia/include/gpu/gl/GrGLConfig.h new file mode 100644 index 0000000000..e3573486ca --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLConfig.h @@ -0,0 +1,79 @@ + +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + + +#ifndef GrGLConfig_DEFINED +#define GrGLConfig_DEFINED + +#include "include/gpu/GrTypes.h" + +/** + * Optional GL config file. + */ +#ifdef GR_GL_CUSTOM_SETUP_HEADER + #include GR_GL_CUSTOM_SETUP_HEADER +#endif + +#if !defined(GR_GL_FUNCTION_TYPE) + #if defined(SK_BUILD_FOR_WIN) + #define GR_GL_FUNCTION_TYPE __stdcall + #else + #define GR_GL_FUNCTION_TYPE + #endif +#endif + +/** + * The following are optional defines that can be enabled at the compiler + * command line, in a IDE project, in a GrUserConfig.h file, or in a GL custom + * file (if one is in use). If a GR_GL_CUSTOM_SETUP_HEADER is used they can + * also be placed there. + * + * GR_GL_LOG_CALLS: if 1 Gr can print every GL call using SkDebugf. Defaults to + * 0. Logging can be enabled and disabled at runtime using a debugger via to + * global gLogCallsGL. The initial value of gLogCallsGL is controlled by + * GR_GL_LOG_CALLS_START. + * + * GR_GL_LOG_CALLS_START: controls the initial value of gLogCallsGL when + * GR_GL_LOG_CALLS is 1. Defaults to 0. + * + * GR_GL_CHECK_ERROR: if enabled Gr can do a glGetError() after every GL call. + * Defaults to 1 if SK_DEBUG is set, otherwise 0. When GR_GL_CHECK_ERROR is 1 + * this can be toggled in a debugger using the gCheckErrorGL global. The initial + * value of gCheckErrorGL is controlled by by GR_GL_CHECK_ERROR_START. + * + * GR_GL_CHECK_ERROR_START: controls the initial value of gCheckErrorGL + * when GR_GL_CHECK_ERROR is 1. Defaults to 1. + * + */ + +#if !defined(GR_GL_LOG_CALLS) + #ifdef SK_DEBUG + #define GR_GL_LOG_CALLS 1 + #else + #define GR_GL_LOG_CALLS 0 + #endif +#endif + +#if !defined(GR_GL_LOG_CALLS_START) + #define GR_GL_LOG_CALLS_START 0 +#endif + +#if !defined(GR_GL_CHECK_ERROR) + #ifdef SK_DEBUG + #define GR_GL_CHECK_ERROR 1 + #else + #define GR_GL_CHECK_ERROR 0 + #endif +#endif + +#if !defined(GR_GL_CHECK_ERROR_START) + #define GR_GL_CHECK_ERROR_START 1 +#endif + +#endif diff --git a/gfx/skia/skia/include/gpu/gl/GrGLConfig_chrome.h b/gfx/skia/skia/include/gpu/gl/GrGLConfig_chrome.h new file mode 100644 index 0000000000..40127d1704 --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLConfig_chrome.h @@ -0,0 +1,14 @@ + +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef GrGLConfig_chrome_DEFINED +#define GrGLConfig_chrome_DEFINED + +// glGetError() forces a sync with gpu process on chrome +#define GR_GL_CHECK_ERROR_START 0 + +#endif diff --git a/gfx/skia/skia/include/gpu/gl/GrGLExtensions.h b/gfx/skia/skia/include/gpu/gl/GrGLExtensions.h new file mode 100644 index 0000000000..dfa83e1962 --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLExtensions.h @@ -0,0 +1,78 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrGLExtensions_DEFINED +#define GrGLExtensions_DEFINED + +#include "include/core/SkString.h" +#include "include/gpu/gl/GrGLFunctions.h" +#include "include/private/base/SkTArray.h" + +#include + +struct GrGLInterface; +class SkJSONWriter; + +/** + * This helper queries the current GL context for its extensions, remembers them, and can be + * queried. It supports both glGetString- and glGetStringi-style extension string APIs and will + * use the latter if it is available. It also will query for EGL extensions if a eglQueryString + * implementation is provided. + */ +class SK_API GrGLExtensions { +public: + GrGLExtensions() {} + + GrGLExtensions(const GrGLExtensions&); + + GrGLExtensions& operator=(const GrGLExtensions&); + + void swap(GrGLExtensions* that) { + using std::swap; + swap(fStrings, that->fStrings); + swap(fInitialized, that->fInitialized); + } + + /** + * We sometimes need to use this class without having yet created a GrGLInterface. This version + * of init expects that getString is always non-NULL while getIntegerv and getStringi are non- + * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail. + */ + bool init(GrGLStandard standard, + GrGLFunction getString, + GrGLFunction getStringi, + GrGLFunction getIntegerv, + GrGLFunction queryString = nullptr, + GrEGLDisplay eglDisplay = nullptr); + + bool isInitialized() const { return fInitialized; } + + /** + * Queries whether an extension is present. This will fail if init() has not been called. + */ + bool has(const char[]) const; + + /** + * Removes an extension if present. Returns true if the extension was present before the call. + */ + bool remove(const char[]); + + /** + * Adds an extension to list + */ + void add(const char[]); + + void reset() { fStrings.clear(); } + + void dumpJSON(SkJSONWriter*) const; + +private: + bool fInitialized = false; + SkTArray fStrings; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/gl/GrGLFunctions.h b/gfx/skia/skia/include/gpu/gl/GrGLFunctions.h new file mode 100644 index 0000000000..4e488abcad --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLFunctions.h @@ -0,0 +1,307 @@ + +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrGLFunctions_DEFINED +#define GrGLFunctions_DEFINED + +#include +#include "include/gpu/gl/GrGLTypes.h" +#include "include/private/base/SkTLogic.h" + + +extern "C" { + +/////////////////////////////////////////////////////////////////////////////// + +using GrGLActiveTextureFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum texture); +using GrGLAttachShaderFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint shader); +using GrGLBeginQueryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint id); +using GrGLBindAttribLocationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint index, const char* name); +using GrGLBindBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint buffer); +using GrGLBindFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint framebuffer); +using GrGLBindRenderbufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint renderbuffer); +using GrGLBindTextureFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint texture); +using GrGLBindFragDataLocationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name); +using GrGLBindFragDataLocationIndexedFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint colorNumber, GrGLuint index, const GrGLchar* name); +using GrGLBindSamplerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint unit, GrGLuint sampler); +using GrGLBindVertexArrayFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint array); +using GrGLBlendBarrierFn = GrGLvoid GR_GL_FUNCTION_TYPE(); +using GrGLBlendColorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha); +using GrGLBlendEquationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode); +using GrGLBlendFuncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum sfactor, GrGLenum dfactor); +using GrGLBlitFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter); +using GrGLBufferDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage); +using GrGLBufferSubDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data); +using GrGLCheckFramebufferStatusFn = GrGLenum GR_GL_FUNCTION_TYPE(GrGLenum target); +using GrGLClearFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLbitfield mask); +using GrGLClearColorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha); +using GrGLClearStencilFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint s); +using GrGLClearTexImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level, GrGLenum format, GrGLenum type, const GrGLvoid* data); +using GrGLClearTexSubImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLenum format, GrGLenum type, const GrGLvoid* data); +using GrGLColorMaskFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha); +using GrGLCompileShaderFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader); +using GrGLCompressedTexImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data); +using GrGLCompressedTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLsizei imageSize, const GrGLvoid* data); +using GrGLCopyBufferSubDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum readTargt, GrGLenum writeTarget, GrGLintptr readOffset, GrGLintptr writeOffset, GrGLsizeiptr size); +using GrGLCopyTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height); +using GrGLCreateProgramFn = GrGLuint GR_GL_FUNCTION_TYPE(); +using GrGLCreateShaderFn = GrGLuint GR_GL_FUNCTION_TYPE(GrGLenum type); +using GrGLCullFaceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode); +using GrGLDeleteBuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* buffers); +using GrGLDeleteFencesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* fences); +using GrGLDeleteFramebuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* framebuffers); +using GrGLDeleteProgramFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program); +using GrGLDeleteQueriesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* ids); +using GrGLDeleteRenderbuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* renderbuffers); +using GrGLDeleteSamplersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei count, const GrGLuint* samplers); +using GrGLDeleteShaderFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader); +using GrGLDeleteTexturesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* textures); +using GrGLDeleteVertexArraysFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* arrays); +using GrGLDepthMaskFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLboolean flag); +using GrGLDisableFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum cap); +using GrGLDisableVertexAttribArrayFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint index); +using GrGLDrawArraysFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLint first, GrGLsizei count); +using GrGLDrawArraysInstancedFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei primcount); +using GrGLDrawArraysIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLvoid* indirect); +using GrGLDrawBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode); +using GrGLDrawBuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLenum* bufs); +using GrGLDrawElementsFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices); +using GrGLDrawElementsInstancedFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices, GrGLsizei primcount); +using GrGLDrawElementsIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect); +using GrGLDrawRangeElementsFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLuint start, GrGLuint end, GrGLsizei count, GrGLenum type, const GrGLvoid* indices); +using GrGLEnableFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum cap); +using GrGLEnableVertexAttribArrayFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint index); +using GrGLEndQueryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target); +using GrGLFinishFn = GrGLvoid GR_GL_FUNCTION_TYPE(); +using GrGLFinishFenceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint fence); +using GrGLFlushFn = GrGLvoid GR_GL_FUNCTION_TYPE(); +using GrGLFlushMappedBufferRangeFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length); +using GrGLFramebufferRenderbufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer); +using GrGLFramebufferTexture2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level); +using GrGLFramebufferTexture2DMultisampleFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level, GrGLsizei samples); +using GrGLFrontFaceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode); +using GrGLGenBuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* buffers); +using GrGLGenFencesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* fences); +using GrGLGenFramebuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* framebuffers); +using GrGLGenerateMipmapFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target); +using GrGLGenQueriesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* ids); +using GrGLGenRenderbuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* renderbuffers); +using GrGLGenSamplersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei count, GrGLuint* samplers); +using GrGLGenTexturesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* textures); +using GrGLGenVertexArraysFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* arrays); +using GrGLGetBufferParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLint* params); +using GrGLGetErrorFn = GrGLenum GR_GL_FUNCTION_TYPE(); +using GrGLGetFramebufferAttachmentParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum pname, GrGLint* params); +using GrGLGetFloatvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLfloat* params); +using GrGLGetIntegervFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLint* params); +using GrGLGetMultisamplefvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLuint index, GrGLfloat* val); +using GrGLGetProgramBinaryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, GrGLenum* binaryFormat, void* binary); +using GrGLGetProgramInfoLogFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog); +using GrGLGetProgramivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLenum pname, GrGLint* params); +using GrGLGetQueryivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum GLtarget, GrGLenum pname, GrGLint* params); +using GrGLGetQueryObjecti64vFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLint64* params); +using GrGLGetQueryObjectivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLint* params); +using GrGLGetQueryObjectui64vFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLuint64* params); +using GrGLGetQueryObjectuivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLuint* params); +using GrGLGetRenderbufferParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLint* params); +using GrGLGetShaderInfoLogFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader, GrGLsizei bufsize, GrGLsizei* length, char* infolog); +using GrGLGetShaderivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader, GrGLenum pname, GrGLint* params); +using GrGLGetShaderPrecisionFormatFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum shadertype, GrGLenum precisiontype, GrGLint* range, GrGLint* precision); +using GrGLGetStringFn = const GrGLubyte* GR_GL_FUNCTION_TYPE(GrGLenum name); +using GrGLGetStringiFn = const GrGLubyte* GR_GL_FUNCTION_TYPE(GrGLenum name, GrGLuint index); +using GrGLGetTexLevelParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLenum pname, GrGLint* params); +using GrGLGetUniformLocationFn = GrGLint GR_GL_FUNCTION_TYPE(GrGLuint program, const char* name); +using GrGLInsertEventMarkerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei length, const char* marker); +using GrGLInvalidateBufferDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint buffer); +using GrGLInvalidateBufferSubDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length); +using GrGLInvalidateFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments); +using GrGLInvalidateSubFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height); +using GrGLInvalidateTexImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level); +using GrGLInvalidateTexSubImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth); +using GrGLIsTextureFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLuint texture); +using GrGLLineWidthFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLfloat width); +using GrGLLinkProgramFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program); +using GrGLMapBufferFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum access); +using GrGLMapBufferRangeFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access); +using GrGLMapBufferSubDataFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLuint target, GrGLintptr offset, GrGLsizeiptr size, GrGLenum access); +using GrGLMapTexSubImage2DFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLenum access); +using GrGLMemoryBarrierFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLbitfield barriers); +using GrGLPatchParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLint value); +using GrGLPixelStoreiFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLint param); +using GrGLPolygonModeFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLenum mode); +using GrGLPopGroupMarkerFn = GrGLvoid GR_GL_FUNCTION_TYPE(); +using GrGLProgramBinaryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLenum binaryFormat, void* binary, GrGLsizei length); +using GrGLProgramParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLenum pname, GrGLint value); +using GrGLPushGroupMarkerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei length, const char* marker); +using GrGLQueryCounterFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum target); +using GrGLReadBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum src); +using GrGLReadPixelsFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels); +using GrGLRenderbufferStorageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height); +using GrGLRenderbufferStorageMultisampleFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height); +using GrGLResolveMultisampleFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(); +using GrGLSamplerParameterfFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint sampler, GrGLenum pname, GrGLfloat param); +using GrGLSamplerParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint sampler, GrGLenum pname, GrGLint param); +using GrGLSamplerParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint sampler, GrGLenum pname, const GrGLint* params); +using GrGLScissorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height); +// GL_CHROMIUM_bind_uniform_location +using GrGLBindUniformLocationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLint location, const char* name); +using GrGLSetFenceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint fence, GrGLenum condition); +using GrGLShaderSourceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader, GrGLsizei count, const char* const* str, const GrGLint* length); +using GrGLStencilFuncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum func, GrGLint ref, GrGLuint mask); +using GrGLStencilFuncSeparateFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask); +using GrGLStencilMaskFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint mask); +using GrGLStencilMaskSeparateFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLuint mask); +using GrGLStencilOpFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum fail, GrGLenum zfail, GrGLenum zpass); +using GrGLStencilOpSeparateFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass); +using GrGLTexBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLuint buffer); +using GrGLTexBufferRangeFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size); +using GrGLTexImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels); +using GrGLTexParameterfFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLfloat param); +using GrGLTexParameterfvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, const GrGLfloat* params); +using GrGLTexParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLint param); +using GrGLTexParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, const GrGLint* params); +using GrGLTexStorage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei levels, GrGLenum internalformat, GrGLsizei width, GrGLsizei height); +using GrGLDiscardFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments); +using GrGLTestFenceFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLuint fence); +using GrGLTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels); +using GrGLTextureBarrierFn = GrGLvoid GR_GL_FUNCTION_TYPE(); +using GrGLUniform1fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0); +using GrGLUniform1iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0); +using GrGLUniform1fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v); +using GrGLUniform1ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v); +using GrGLUniform2fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0, GrGLfloat v1); +using GrGLUniform2iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0, GrGLint v1); +using GrGLUniform2fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v); +using GrGLUniform2ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v); +using GrGLUniform3fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2); +using GrGLUniform3iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2); +using GrGLUniform3fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v); +using GrGLUniform3ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v); +using GrGLUniform4fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2, GrGLfloat v3); +using GrGLUniform4iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3); +using GrGLUniform4fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v); +using GrGLUniform4ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v); +using GrGLUniformMatrix2fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value); +using GrGLUniformMatrix3fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value); +using GrGLUniformMatrix4fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value); +using GrGLUnmapBufferFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLenum target); +using GrGLUnmapBufferSubDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(const GrGLvoid* mem); +using GrGLUnmapTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(const GrGLvoid* mem); +using GrGLUseProgramFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program); +using GrGLVertexAttrib1fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat value); +using GrGLVertexAttrib2fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat* values); +using GrGLVertexAttrib3fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat* values); +using GrGLVertexAttrib4fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat* values); +using GrGLVertexAttribDivisorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint index, GrGLuint divisor); +using GrGLVertexAttribIPointerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* ptr); +using GrGLVertexAttribPointerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr); +using GrGLViewportFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height); + +/* GL_NV_framebuffer_mixed_samples */ +using GrGLCoverageModulationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum components); + +/* EXT_base_instance */ +using GrGLDrawArraysInstancedBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei instancecount, GrGLuint baseinstance); +using GrGLDrawElementsInstancedBaseVertexBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, GrGLenum type, const void *indices, GrGLsizei instancecount, GrGLint basevertex, GrGLuint baseinstance); + +/* EXT_multi_draw_indirect */ +using GrGLMultiDrawArraysIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLvoid* indirect, GrGLsizei drawcount, GrGLsizei stride); +using GrGLMultiDrawElementsIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect, GrGLsizei drawcount, GrGLsizei stride); + +/* ANGLE_base_vertex_base_instance */ +using GrGLMultiDrawArraysInstancedBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLint* firsts, const GrGLsizei* counts, const GrGLsizei* instanceCounts, const GrGLuint* baseInstances, const GrGLsizei drawcount); +using GrGLMultiDrawElementsInstancedBaseVertexBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLint* counts, GrGLenum type, const GrGLvoid* const* indices, const GrGLsizei* instanceCounts, const GrGLint* baseVertices, const GrGLuint* baseInstances, const GrGLsizei drawcount); + +/* ARB_sync */ +using GrGLFenceSyncFn = GrGLsync GR_GL_FUNCTION_TYPE(GrGLenum condition, GrGLbitfield flags); +using GrGLIsSyncFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLsync sync); +using GrGLClientWaitSyncFn = GrGLenum GR_GL_FUNCTION_TYPE(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout); +using GrGLWaitSyncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout); +using GrGLDeleteSyncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsync sync); + +/* ARB_internalformat_query */ +using GrGLGetInternalformativFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLenum pname, GrGLsizei bufSize, GrGLint* params); + +/* KHR_debug */ +using GrGLDebugMessageControlFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum source, GrGLenum type, GrGLenum severity, GrGLsizei count, const GrGLuint* ids, GrGLboolean enabled); +using GrGLDebugMessageInsertFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum source, GrGLenum type, GrGLuint id, GrGLenum severity, GrGLsizei length, const GrGLchar* buf); +using GrGLDebugMessageCallbackFn = GrGLvoid GR_GL_FUNCTION_TYPE(GRGLDEBUGPROC callback, const GrGLvoid* userParam); +using GrGLGetDebugMessageLogFn = GrGLuint GR_GL_FUNCTION_TYPE(GrGLuint count, GrGLsizei bufSize, GrGLenum* sources, GrGLenum* types, GrGLuint* ids, GrGLenum* severities, GrGLsizei* lengths, GrGLchar* messageLog); +using GrGLPushDebugGroupFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum source, GrGLuint id, GrGLsizei length, const GrGLchar* message); +using GrGLPopDebugGroupFn = GrGLvoid GR_GL_FUNCTION_TYPE(); +using GrGLObjectLabelFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum identifier, GrGLuint name, GrGLsizei length, const GrGLchar* label); + +/** EXT_window_rectangles */ +using GrGLWindowRectanglesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, const GrGLint box[]); + +/** GL_QCOM_tiled_rendering */ +using GrGLStartTilingFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint x, GrGLuint y, GrGLuint width, GrGLuint height, GrGLbitfield preserveMask); +using GrGLEndTilingFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLbitfield preserveMask); + +/** EGL functions */ +using GrEGLQueryStringFn = const char* GR_GL_FUNCTION_TYPE(GrEGLDisplay dpy, GrEGLint name); +using GrEGLGetCurrentDisplayFn = GrEGLDisplay GR_GL_FUNCTION_TYPE(); +using GrEGLCreateImageFn = GrEGLImage GR_GL_FUNCTION_TYPE(GrEGLDisplay dpy, GrEGLContext ctx, GrEGLenum target, GrEGLClientBuffer buffer, const GrEGLint* attrib_list); +using GrEGLDestroyImageFn = GrEGLBoolean GR_GL_FUNCTION_TYPE(GrEGLDisplay dpy, GrEGLImage image); +} // extern "C" + +// This is a lighter-weight std::function, trying to reduce code size and compile time +// by only supporting the exact use cases we require. +template class GrGLFunction; + +template +class GrGLFunction { +public: + using Fn = R GR_GL_FUNCTION_TYPE(Args...); + // Construct empty. + GrGLFunction() = default; + GrGLFunction(std::nullptr_t) {} + + // Construct from a simple function pointer. + GrGLFunction(Fn* fn_ptr) { + static_assert(sizeof(fn_ptr) <= sizeof(fBuf), "fBuf is too small"); + if (fn_ptr) { + memcpy(fBuf, &fn_ptr, sizeof(fn_ptr)); + fCall = [](const void* buf, Args... args) { + return (*(Fn**)buf)(std::forward(args)...); + }; + } + } + + // Construct from a small closure. + template + GrGLFunction(Closure closure) : GrGLFunction() { + static_assert(sizeof(Closure) <= sizeof(fBuf), "fBuf is too small"); +#if defined(__APPLE__) // I am having serious trouble getting these to work with all STLs... + static_assert(std::is_trivially_copyable::value, ""); + static_assert(std::is_trivially_destructible::value, ""); +#endif + + memcpy(fBuf, &closure, sizeof(closure)); + fCall = [](const void* buf, Args... args) { + auto closure = (const Closure*)buf; + return (*closure)(args...); + }; + } + + R operator()(Args... args) const { + SkASSERT(fCall); + return fCall(fBuf, std::forward(args)...); + } + + explicit operator bool() const { return fCall != nullptr; } + + void reset() { fCall = nullptr; } + +private: + using Call = R(const void* buf, Args...); + Call* fCall = nullptr; + size_t fBuf[4]; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/gl/GrGLInterface.h b/gfx/skia/skia/include/gpu/gl/GrGLInterface.h new file mode 100644 index 0000000000..64ca419b9b --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLInterface.h @@ -0,0 +1,340 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrGLInterface_DEFINED +#define GrGLInterface_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/gpu/gl/GrGLExtensions.h" +#include "include/gpu/gl/GrGLFunctions.h" + +//////////////////////////////////////////////////////////////////////////////// + +typedef void(*GrGLFuncPtr)(); +struct GrGLInterface; + + +/** + * Rather than depend on platform-specific GL headers and libraries, we require + * the client to provide a struct of GL function pointers. This struct can be + * specified per-GrContext as a parameter to GrContext::MakeGL. If no interface is + * passed to MakeGL then a default GL interface is created using GrGLMakeNativeInterface(). + * If this returns nullptr then GrContext::MakeGL() will fail. + * + * The implementation of GrGLMakeNativeInterface is platform-specific. Several + * implementations have been provided (for GLX, WGL, EGL, etc), along with an + * implementation that simply returns nullptr. Clients should select the most + * appropriate one to build. + */ +SK_API sk_sp GrGLMakeNativeInterface(); + +/** + * GrContext uses the following interface to make all calls into OpenGL. When a + * GrContext is created it is given a GrGLInterface. The interface's function + * pointers must be valid for the OpenGL context associated with the GrContext. + * On some platforms, such as Windows, function pointers for OpenGL extensions + * may vary between OpenGL contexts. So the caller must be careful to use a + * GrGLInterface initialized for the correct context. All functions that should + * be available based on the OpenGL's version and extension string must be + * non-NULL or GrContext creation will fail. This can be tested with the + * validate() method when the OpenGL context has been made current. + */ +struct SK_API GrGLInterface : public SkRefCnt { +private: + using INHERITED = SkRefCnt; + +#if GR_GL_CHECK_ERROR + // This is here to avoid having our debug code that checks for a GL error after most GL calls + // accidentally swallow an OOM that should be reported. + mutable bool fOOMed = false; + bool fSuppressErrorLogging = false; +#endif + +public: + GrGLInterface(); + + // Validates that the GrGLInterface supports its advertised standard. This means the necessary + // function pointers have been initialized for both the GL version and any advertised + // extensions. + bool validate() const; + +#if GR_GL_CHECK_ERROR + GrGLenum checkError(const char* location, const char* call) const; + bool checkAndResetOOMed() const; + void suppressErrorLogging(); +#endif + +#if GR_TEST_UTILS + GrGLInterface(const GrGLInterface& that) + : fStandard(that.fStandard) + , fExtensions(that.fExtensions) + , fFunctions(that.fFunctions) {} +#endif + + // Indicates the type of GL implementation + union { + GrGLStandard fStandard; + GrGLStandard fBindingsExported; // Legacy name, will be remove when Chromium is updated. + }; + + GrGLExtensions fExtensions; + + bool hasExtension(const char ext[]) const { return fExtensions.has(ext); } + + /** + * The function pointers are in a struct so that we can have a compiler generated assignment + * operator. + */ + struct Functions { + GrGLFunction fActiveTexture; + GrGLFunction fAttachShader; + GrGLFunction fBeginQuery; + GrGLFunction fBindAttribLocation; + GrGLFunction fBindBuffer; + GrGLFunction fBindFragDataLocation; + GrGLFunction fBindFragDataLocationIndexed; + GrGLFunction fBindFramebuffer; + GrGLFunction fBindRenderbuffer; + GrGLFunction fBindSampler; + GrGLFunction fBindTexture; + GrGLFunction fBindVertexArray; + GrGLFunction fBlendBarrier; + GrGLFunction fBlendColor; + GrGLFunction fBlendEquation; + GrGLFunction fBlendFunc; + GrGLFunction fBlitFramebuffer; + GrGLFunction fBufferData; + GrGLFunction fBufferSubData; + GrGLFunction fCheckFramebufferStatus; + GrGLFunction fClear; + GrGLFunction fClearColor; + GrGLFunction fClearStencil; + GrGLFunction fClearTexImage; + GrGLFunction fClearTexSubImage; + GrGLFunction fColorMask; + GrGLFunction fCompileShader; + GrGLFunction fCompressedTexImage2D; + GrGLFunction fCompressedTexSubImage2D; + GrGLFunction fCopyBufferSubData; + GrGLFunction fCopyTexSubImage2D; + GrGLFunction fCreateProgram; + GrGLFunction fCreateShader; + GrGLFunction fCullFace; + GrGLFunction fDeleteBuffers; + GrGLFunction fDeleteFences; + GrGLFunction fDeleteFramebuffers; + GrGLFunction fDeleteProgram; + GrGLFunction fDeleteQueries; + GrGLFunction fDeleteRenderbuffers; + GrGLFunction fDeleteSamplers; + GrGLFunction fDeleteShader; + GrGLFunction fDeleteTextures; + GrGLFunction fDeleteVertexArrays; + GrGLFunction fDepthMask; + GrGLFunction fDisable; + GrGLFunction fDisableVertexAttribArray; + GrGLFunction fDrawArrays; + GrGLFunction fDrawArraysIndirect; + GrGLFunction fDrawArraysInstanced; + GrGLFunction fDrawBuffer; + GrGLFunction fDrawBuffers; + GrGLFunction fDrawElements; + GrGLFunction fDrawElementsIndirect; + GrGLFunction fDrawElementsInstanced; + GrGLFunction fDrawRangeElements; + GrGLFunction fEnable; + GrGLFunction fEnableVertexAttribArray; + GrGLFunction fEndQuery; + GrGLFunction fFinish; + GrGLFunction fFinishFence; + GrGLFunction fFlush; + GrGLFunction fFlushMappedBufferRange; + GrGLFunction fFramebufferRenderbuffer; + GrGLFunction fFramebufferTexture2D; + GrGLFunction fFramebufferTexture2DMultisample; + GrGLFunction fFrontFace; + GrGLFunction fGenBuffers; + GrGLFunction fGenFences; + GrGLFunction fGenFramebuffers; + GrGLFunction fGenerateMipmap; + GrGLFunction fGenQueries; + GrGLFunction fGenRenderbuffers; + GrGLFunction fGenSamplers; + GrGLFunction fGenTextures; + GrGLFunction fGenVertexArrays; + GrGLFunction fGetBufferParameteriv; + GrGLFunction fGetError; + GrGLFunction fGetFramebufferAttachmentParameteriv; + GrGLFunction fGetFloatv; + GrGLFunction fGetIntegerv; + GrGLFunction fGetMultisamplefv; + GrGLFunction fGetProgramBinary; + GrGLFunction fGetProgramInfoLog; + GrGLFunction fGetProgramiv; + GrGLFunction fGetQueryObjecti64v; + GrGLFunction fGetQueryObjectiv; + GrGLFunction fGetQueryObjectui64v; + GrGLFunction fGetQueryObjectuiv; + GrGLFunction fGetQueryiv; + GrGLFunction fGetRenderbufferParameteriv; + GrGLFunction fGetShaderInfoLog; + GrGLFunction fGetShaderiv; + GrGLFunction fGetShaderPrecisionFormat; + GrGLFunction fGetString; + GrGLFunction fGetStringi; + GrGLFunction fGetTexLevelParameteriv; + GrGLFunction fGetUniformLocation; + GrGLFunction fInsertEventMarker; + GrGLFunction fInvalidateBufferData; + GrGLFunction fInvalidateBufferSubData; + GrGLFunction fInvalidateFramebuffer; + GrGLFunction fInvalidateSubFramebuffer; + GrGLFunction fInvalidateTexImage; + GrGLFunction fInvalidateTexSubImage; + GrGLFunction fIsTexture; + GrGLFunction fLineWidth; + GrGLFunction fLinkProgram; + GrGLFunction fProgramBinary; + GrGLFunction fProgramParameteri; + GrGLFunction fMapBuffer; + GrGLFunction fMapBufferRange; + GrGLFunction fMapBufferSubData; + GrGLFunction fMapTexSubImage2D; + GrGLFunction fMemoryBarrier; + GrGLFunction fDrawArraysInstancedBaseInstance; + GrGLFunction fDrawElementsInstancedBaseVertexBaseInstance; + GrGLFunction fMultiDrawArraysIndirect; + GrGLFunction fMultiDrawElementsIndirect; + GrGLFunction fMultiDrawArraysInstancedBaseInstance; + GrGLFunction fMultiDrawElementsInstancedBaseVertexBaseInstance; + GrGLFunction fPatchParameteri; + GrGLFunction fPixelStorei; + GrGLFunction fPolygonMode; + GrGLFunction fPopGroupMarker; + GrGLFunction fPushGroupMarker; + GrGLFunction fQueryCounter; + GrGLFunction fReadBuffer; + GrGLFunction fReadPixels; + GrGLFunction fRenderbufferStorage; + + // On OpenGL ES there are multiple incompatible extensions that add support for MSAA + // and ES3 adds MSAA support to the standard. On an ES3 driver we may still use the + // older extensions for performance reasons or due to ES3 driver bugs. We want the function + // that creates the GrGLInterface to provide all available functions and internally + // we will select among them. They all have a method called glRenderbufferStorageMultisample*. + // So we have separate function pointers for GL_IMG/EXT_multisampled_to_texture, + // GL_CHROMIUM/ANGLE_framebuffer_multisample/ES3, and GL_APPLE_framebuffer_multisample + // variations. + // + // If a driver supports multiple GL_ARB_framebuffer_multisample-style extensions then we will + // assume the function pointers for the standard (or equivalent GL_ARB) version have + // been preferred over GL_EXT, GL_CHROMIUM, or GL_ANGLE variations that have reduced + // functionality. + + // GL_EXT_multisampled_render_to_texture (preferred) or GL_IMG_multisampled_render_to_texture + GrGLFunction fRenderbufferStorageMultisampleES2EXT; + // GL_APPLE_framebuffer_multisample + GrGLFunction fRenderbufferStorageMultisampleES2APPLE; + + // This is used to store the pointer for GL_ARB/EXT/ANGLE/CHROMIUM_framebuffer_multisample or + // the standard function in ES3+ or GL 3.0+. + GrGLFunction fRenderbufferStorageMultisample; + + // Pointer to BindUniformLocationCHROMIUM from the GL_CHROMIUM_bind_uniform_location extension. + GrGLFunction fBindUniformLocation; + + GrGLFunction fResolveMultisampleFramebuffer; + GrGLFunction fSamplerParameterf; + GrGLFunction fSamplerParameteri; + GrGLFunction fSamplerParameteriv; + GrGLFunction fScissor; + GrGLFunction fSetFence; + GrGLFunction fShaderSource; + GrGLFunction fStencilFunc; + GrGLFunction fStencilFuncSeparate; + GrGLFunction fStencilMask; + GrGLFunction fStencilMaskSeparate; + GrGLFunction fStencilOp; + GrGLFunction fStencilOpSeparate; + GrGLFunction fTestFence; + GrGLFunction fTexBuffer; + GrGLFunction fTexBufferRange; + GrGLFunction fTexImage2D; + GrGLFunction fTexParameterf; + GrGLFunction fTexParameterfv; + GrGLFunction fTexParameteri; + GrGLFunction fTexParameteriv; + GrGLFunction fTexSubImage2D; + GrGLFunction fTexStorage2D; + GrGLFunction fTextureBarrier; + GrGLFunction fDiscardFramebuffer; + GrGLFunction fUniform1f; + GrGLFunction fUniform1i; + GrGLFunction fUniform1fv; + GrGLFunction fUniform1iv; + GrGLFunction fUniform2f; + GrGLFunction fUniform2i; + GrGLFunction fUniform2fv; + GrGLFunction fUniform2iv; + GrGLFunction fUniform3f; + GrGLFunction fUniform3i; + GrGLFunction fUniform3fv; + GrGLFunction fUniform3iv; + GrGLFunction fUniform4f; + GrGLFunction fUniform4i; + GrGLFunction fUniform4fv; + GrGLFunction fUniform4iv; + GrGLFunction fUniformMatrix2fv; + GrGLFunction fUniformMatrix3fv; + GrGLFunction fUniformMatrix4fv; + GrGLFunction fUnmapBuffer; + GrGLFunction fUnmapBufferSubData; + GrGLFunction fUnmapTexSubImage2D; + GrGLFunction fUseProgram; + GrGLFunction fVertexAttrib1f; + GrGLFunction fVertexAttrib2fv; + GrGLFunction fVertexAttrib3fv; + GrGLFunction fVertexAttrib4fv; + GrGLFunction fVertexAttribDivisor; + GrGLFunction fVertexAttribIPointer; + GrGLFunction fVertexAttribPointer; + GrGLFunction fViewport; + + /* ARB_sync */ + GrGLFunction fFenceSync; + GrGLFunction fIsSync; + GrGLFunction fClientWaitSync; + GrGLFunction fWaitSync; + GrGLFunction fDeleteSync; + + /* ARB_internalforamt_query */ + GrGLFunction fGetInternalformativ; + + /* KHR_debug */ + GrGLFunction fDebugMessageControl; + GrGLFunction fDebugMessageInsert; + GrGLFunction fDebugMessageCallback; + GrGLFunction fGetDebugMessageLog; + GrGLFunction fPushDebugGroup; + GrGLFunction fPopDebugGroup; + GrGLFunction fObjectLabel; + + /* EXT_window_rectangles */ + GrGLFunction fWindowRectangles; + + /* GL_QCOM_tiled_rendering */ + GrGLFunction fStartTiling; + GrGLFunction fEndTiling; + } fFunctions; + +#if GR_TEST_UTILS + // This exists for internal testing. + virtual void abandon() const; +#endif +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/gl/GrGLTypes.h b/gfx/skia/skia/include/gpu/gl/GrGLTypes.h new file mode 100644 index 0000000000..3af4802eaa --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/GrGLTypes.h @@ -0,0 +1,208 @@ + +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrGLTypes_DEFINED +#define GrGLTypes_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/gl/GrGLConfig.h" + +/** + * Classifies GL contexts by which standard they implement (currently as OpenGL vs. OpenGL ES). + */ +enum GrGLStandard { + kNone_GrGLStandard, + kGL_GrGLStandard, + kGLES_GrGLStandard, + kWebGL_GrGLStandard, +}; +static const int kGrGLStandardCnt = 4; + +// The following allow certain interfaces to be turned off at compile time +// (for example, to lower code size). +#if SK_ASSUME_GL_ES + #define GR_IS_GR_GL(standard) false + #define GR_IS_GR_GL_ES(standard) true + #define GR_IS_GR_WEBGL(standard) false + #define SK_DISABLE_GL_INTERFACE 1 + #define SK_DISABLE_WEBGL_INTERFACE 1 +#elif SK_ASSUME_GL + #define GR_IS_GR_GL(standard) true + #define GR_IS_GR_GL_ES(standard) false + #define GR_IS_GR_WEBGL(standard) false + #define SK_DISABLE_GL_ES_INTERFACE 1 + #define SK_DISABLE_WEBGL_INTERFACE 1 +#elif SK_ASSUME_WEBGL + #define GR_IS_GR_GL(standard) false + #define GR_IS_GR_GL_ES(standard) false + #define GR_IS_GR_WEBGL(standard) true + #define SK_DISABLE_GL_ES_INTERFACE 1 + #define SK_DISABLE_GL_INTERFACE 1 +#else + #define GR_IS_GR_GL(standard) (kGL_GrGLStandard == standard) + #define GR_IS_GR_GL_ES(standard) (kGLES_GrGLStandard == standard) + #define GR_IS_GR_WEBGL(standard) (kWebGL_GrGLStandard == standard) +#endif + +/////////////////////////////////////////////////////////////////////////////// + +/** + * The supported GL formats represented as an enum. Actual support by GrContext depends on GL + * context version and extensions. + */ +enum class GrGLFormat { + kUnknown, + + kRGBA8, + kR8, + kALPHA8, + kLUMINANCE8, + kLUMINANCE8_ALPHA8, + kBGRA8, + kRGB565, + kRGBA16F, + kR16F, + kRGB8, + kRGBX8, + kRG8, + kRGB10_A2, + kRGBA4, + kSRGB8_ALPHA8, + kCOMPRESSED_ETC1_RGB8, + kCOMPRESSED_RGB8_ETC2, + kCOMPRESSED_RGB8_BC1, + kCOMPRESSED_RGBA8_BC1, + kR16, + kRG16, + kRGBA16, + kRG16F, + kLUMINANCE16F, + + kLastColorFormat = kLUMINANCE16F, + + // Depth/Stencil formats + kSTENCIL_INDEX8, + kSTENCIL_INDEX16, + kDEPTH24_STENCIL8, + + kLast = kDEPTH24_STENCIL8 +}; + +/////////////////////////////////////////////////////////////////////////////// +/** + * Declares typedefs for all the GL functions used in GrGLInterface + */ + +typedef unsigned int GrGLenum; +typedef unsigned char GrGLboolean; +typedef unsigned int GrGLbitfield; +typedef signed char GrGLbyte; +typedef char GrGLchar; +typedef short GrGLshort; +typedef int GrGLint; +typedef int GrGLsizei; +typedef int64_t GrGLint64; +typedef unsigned char GrGLubyte; +typedef unsigned short GrGLushort; +typedef unsigned int GrGLuint; +typedef uint64_t GrGLuint64; +typedef unsigned short int GrGLhalf; +typedef float GrGLfloat; +typedef float GrGLclampf; +typedef double GrGLdouble; +typedef double GrGLclampd; +typedef void GrGLvoid; +#ifdef _WIN64 +typedef signed long long int GrGLintptr; +typedef signed long long int GrGLsizeiptr; +#else +typedef signed long int GrGLintptr; +typedef signed long int GrGLsizeiptr; +#endif +typedef void* GrGLeglImage; +typedef struct __GLsync* GrGLsync; + +struct GrGLDrawArraysIndirectCommand { + GrGLuint fCount; + GrGLuint fInstanceCount; + GrGLuint fFirst; + GrGLuint fBaseInstance; // Requires EXT_base_instance on ES. +}; + +// static_asserts must have messages in this file because its included in C++14 client code. +static_assert(16 == sizeof(GrGLDrawArraysIndirectCommand), ""); + +struct GrGLDrawElementsIndirectCommand { + GrGLuint fCount; + GrGLuint fInstanceCount; + GrGLuint fFirstIndex; + GrGLuint fBaseVertex; + GrGLuint fBaseInstance; // Requires EXT_base_instance on ES. +}; + +static_assert(20 == sizeof(GrGLDrawElementsIndirectCommand), ""); + +/** + * KHR_debug + */ +typedef void (GR_GL_FUNCTION_TYPE* GRGLDEBUGPROC)(GrGLenum source, + GrGLenum type, + GrGLuint id, + GrGLenum severity, + GrGLsizei length, + const GrGLchar* message, + const void* userParam); + +/** + * EGL types. + */ +typedef void* GrEGLImage; +typedef void* GrEGLDisplay; +typedef void* GrEGLContext; +typedef void* GrEGLClientBuffer; +typedef unsigned int GrEGLenum; +typedef int32_t GrEGLint; +typedef unsigned int GrEGLBoolean; + +/////////////////////////////////////////////////////////////////////////////// +/** + * Types for interacting with GL resources created externally to Skia. GrBackendObjects for GL + * textures are really const GrGLTexture*. The fFormat here should be a sized, internal format + * for the texture. We will try to use the sized format if the GL Context supports it, otherwise + * we will internally fall back to using the base internal formats. + */ +struct GrGLTextureInfo { + GrGLenum fTarget; + GrGLuint fID; + GrGLenum fFormat = 0; + + bool operator==(const GrGLTextureInfo& that) const { + return fTarget == that.fTarget && fID == that.fID && fFormat == that.fFormat; + } +}; + +struct GrGLFramebufferInfo { + GrGLuint fFBOID; + GrGLenum fFormat = 0; + + bool operator==(const GrGLFramebufferInfo& that) const { + return fFBOID == that.fFBOID && fFormat == that.fFormat; + } +}; + +struct GrGLSurfaceInfo { + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + skgpu::Protected fProtected = skgpu::Protected::kNo; + + GrGLenum fTarget = 0; + GrGLenum fFormat = 0; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/gl/egl/GrGLMakeEGLInterface.h b/gfx/skia/skia/include/gpu/gl/egl/GrGLMakeEGLInterface.h new file mode 100644 index 0000000000..a3eb420b04 --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/egl/GrGLMakeEGLInterface.h @@ -0,0 +1,14 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/gpu/GrTypes.h" + +#include "include/core/SkRefCnt.h" + +struct GrGLInterface; + +sk_sp GrGLMakeEGLInterface(); diff --git a/gfx/skia/skia/include/gpu/gl/glx/GrGLMakeGLXInterface.h b/gfx/skia/skia/include/gpu/gl/glx/GrGLMakeGLXInterface.h new file mode 100644 index 0000000000..b49cde4589 --- /dev/null +++ b/gfx/skia/skia/include/gpu/gl/glx/GrGLMakeGLXInterface.h @@ -0,0 +1,14 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/gpu/GrTypes.h" + +#include "include/core/SkRefCnt.h" + +struct GrGLInterface; + +sk_sp GrGLMakeGLXInterface(); diff --git a/gfx/skia/skia/include/gpu/graphite/BackendTexture.h b/gfx/skia/skia/include/gpu/graphite/BackendTexture.h new file mode 100644 index 0000000000..2502b819a2 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/BackendTexture.h @@ -0,0 +1,153 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_BackendTexture_DEFINED +#define skgpu_graphite_BackendTexture_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/gpu/graphite/TextureInfo.h" + +#ifdef SK_DAWN +#include "include/gpu/graphite/dawn/DawnTypes.h" +#endif + +#ifdef SK_METAL +#include "include/gpu/graphite/mtl/MtlGraphiteTypes.h" +#endif + +#ifdef SK_VULKAN +#include "include/private/gpu/vk/SkiaVulkan.h" +#endif + +namespace skgpu { +class MutableTextureState; +class MutableTextureStateRef; +} + +namespace skgpu::graphite { + +class BackendTexture { +public: + BackendTexture(); +#ifdef SK_DAWN + // Create a BackendTexture from a wgpu::Texture. Texture info will be + // queried from the texture. Comparing to wgpu::TextureView, + // SkImage::readPixels(), SkSurface::readPixels() and + // SkSurface::writePixels() are implemented by direct buffer copy. They + // should be more efficient. For wgpu::TextureView, those methods will use + // create an intermediate wgpu::Texture, and use it to transfer pixels. + // Note: for better performance, using wgpu::Texture IS RECOMMENDED. + BackendTexture(wgpu::Texture texture); + // Create a BackendTexture from a wgpu::TextureView. Texture dimensions and + // info have to be provided. + // Note: this method is for importing wgpu::TextureView from wgpu::SwapChain + // only. + BackendTexture(SkISize dimensions, + const DawnTextureInfo& info, + wgpu::TextureView textureView); +#endif +#ifdef SK_METAL + // The BackendTexture will not call retain or release on the passed in MtlHandle. Thus the + // client must keep the MtlHandle valid until they are no longer using the BackendTexture. + BackendTexture(SkISize dimensions, MtlHandle mtlTexture); +#endif + +#ifdef SK_VULKAN + BackendTexture(SkISize dimensions, + const VulkanTextureInfo&, + VkImageLayout, + uint32_t queueFamilyIndex, + VkImage); +#endif + + BackendTexture(const BackendTexture&); + + ~BackendTexture(); + + BackendTexture& operator=(const BackendTexture&); + + bool operator==(const BackendTexture&) const; + bool operator!=(const BackendTexture& that) const { return !(*this == that); } + + bool isValid() const { return fInfo.isValid(); } + BackendApi backend() const { return fInfo.backend(); } + + SkISize dimensions() const { return fDimensions; } + + const TextureInfo& info() const { return fInfo; } + + // If the client changes any of the mutable backend of the GrBackendTexture they should call + // this function to inform Skia that those values have changed. The backend API specific state + // that can be set from this function are: + // + // Vulkan: VkImageLayout and QueueFamilyIndex + void setMutableState(const skgpu::MutableTextureState&); + +#ifdef SK_DAWN + wgpu::Texture getDawnTexture() const; + wgpu::TextureView getDawnTextureView() const; +#endif +#ifdef SK_METAL + MtlHandle getMtlTexture() const; +#endif + +#ifdef SK_VULKAN + VkImage getVkImage() const; + VkImageLayout getVkImageLayout() const; + uint32_t getVkQueueFamilyIndex() const; +#endif + +private: + sk_sp mutableState() const; + + SkISize fDimensions; + TextureInfo fInfo; + + sk_sp fMutableState; + +#ifdef SK_DAWN + struct Dawn { + Dawn(wgpu::Texture texture) : fTexture(std::move(texture)) {} + Dawn(wgpu::TextureView textureView) : fTextureView(std::move(textureView)) {} + + bool operator==(const Dawn& that) const { + return fTexture.Get() == that.fTexture.Get() && + fTextureView.Get() == that.fTextureView.Get(); + } + bool operator!=(const Dawn& that) const { + return !this->operator==(that); + } + Dawn& operator=(const Dawn& that) { + fTexture = that.fTexture; + fTextureView = that.fTextureView; + return *this; + } + + wgpu::Texture fTexture; + wgpu::TextureView fTextureView; + }; +#endif + + union { +#ifdef SK_DAWN + Dawn fDawn; +#endif +#ifdef SK_METAL + MtlHandle fMtlTexture; +#endif +#ifdef SK_VULKAN + VkImage fVkImage; +#endif + }; +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_BackendTexture_DEFINED + diff --git a/gfx/skia/skia/include/gpu/graphite/Context.h b/gfx/skia/skia/include/gpu/graphite/Context.h new file mode 100644 index 0000000000..d6da45ad4c --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/Context.h @@ -0,0 +1,166 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_Context_DEFINED +#define skgpu_graphite_Context_DEFINED + +#include "include/core/SkImage.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkShader.h" +#include "include/gpu/graphite/ContextOptions.h" +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/gpu/graphite/Recorder.h" +#include "include/private/base/SingleOwner.h" + +#include + +class SkRuntimeEffect; + +namespace skgpu::graphite { + +class BackendTexture; +class Buffer; +class ClientMappedBufferManager; +class Context; +class ContextPriv; +class GlobalCache; +class PaintOptions; +class PlotUploadTracker; +class QueueManager; +class Recording; +class ResourceProvider; +class SharedContext; +class TextureProxy; + +class SK_API Context final { +public: + Context(const Context&) = delete; + Context(Context&&) = delete; + Context& operator=(const Context&) = delete; + Context& operator=(Context&&) = delete; + + ~Context(); + + BackendApi backend() const; + + std::unique_ptr makeRecorder(const RecorderOptions& = {}); + + bool insertRecording(const InsertRecordingInfo&); + bool submit(SyncToCpu = SyncToCpu::kNo); + + void asyncReadPixels(const SkImage* image, + const SkColorInfo& dstColorInfo, + const SkIRect& srcRect, + SkImage::ReadPixelsCallback callback, + SkImage::ReadPixelsContext context); + + void asyncReadPixels(const SkSurface* surface, + const SkColorInfo& dstColorInfo, + const SkIRect& srcRect, + SkImage::ReadPixelsCallback callback, + SkImage::ReadPixelsContext context); + + /** + * Checks whether any asynchronous work is complete and if so calls related callbacks. + */ + void checkAsyncWorkCompletion(); + + /** + * Called to delete the passed in BackendTexture. This should only be called if the + * BackendTexture was created by calling Recorder::createBackendTexture on a Recorder created + * from this Context. If the BackendTexture is not valid or does not match the BackendApi of the + * Context then nothing happens. + * + * Otherwise this will delete/release the backend object that is wrapped in the BackendTexture. + * The BackendTexture will be reset to an invalid state and should not be used again. + */ + void deleteBackendTexture(BackendTexture&); + + // Provides access to functions that aren't part of the public API. + ContextPriv priv(); + const ContextPriv priv() const; // NOLINT(readability-const-return-type) + + class ContextID { + public: + static Context::ContextID Next(); + + ContextID() : fID(SK_InvalidUniqueID) {} + + bool operator==(const ContextID& that) const { return fID == that.fID; } + bool operator!=(const ContextID& that) const { return !(*this == that); } + + void makeInvalid() { fID = SK_InvalidUniqueID; } + bool isValid() const { return fID != SK_InvalidUniqueID; } + + private: + constexpr ContextID(uint32_t id) : fID(id) {} + uint32_t fID; + }; + + ContextID contextID() const { return fContextID; } + +protected: + Context(sk_sp, std::unique_ptr, const ContextOptions&); + +private: + friend class ContextPriv; + friend class ContextCtorAccessor; + + SingleOwner* singleOwner() const { return &fSingleOwner; } + + // Must be called in Make() to handle one-time GPU setup operations that can possibly fail and + // require Context::Make() to return a nullptr. + bool finishInitialization(); + + void asyncReadPixels(const TextureProxy* textureProxy, + const SkImageInfo& srcImageInfo, + const SkColorInfo& dstColorInfo, + const SkIRect& srcRect, + SkImage::ReadPixelsCallback callback, + SkImage::ReadPixelsContext context); + + // Inserts a texture to buffer transfer task, used by asyncReadPixels methods + struct PixelTransferResult { + using ConversionFn = void(void* dst, const void* mappedBuffer); + // If null then the transfer could not be performed. Otherwise this buffer will contain + // the pixel data when the transfer is complete. + sk_sp fTransferBuffer; + // If this is null then the transfer buffer will contain the data in the requested + // color type. Otherwise, when the transfer is done this must be called to convert + // from the transfer buffer's color type to the requested color type. + std::function fPixelConverter; + }; + PixelTransferResult transferPixels(const TextureProxy*, + const SkImageInfo& srcImageInfo, + const SkColorInfo& dstColorInfo, + const SkIRect& srcRect); + + sk_sp fSharedContext; + std::unique_ptr fResourceProvider; + std::unique_ptr fQueueManager; + std::unique_ptr fMappedBufferManager; + std::unique_ptr fPlotUploadTracker; + + // In debug builds we guard against improper thread handling. This guard is passed to the + // ResourceCache for the Context. + mutable SingleOwner fSingleOwner; + +#if GRAPHITE_TEST_UTILS + // In test builds a Recorder may track the Context that was used to create it. + bool fStoreContextRefInRecorder = false; + // If this tracking is on, to allow the client to safely delete this Context or its Recorders + // in any order we must also track the Recorders created here. + std::vector fTrackedRecorders; +#endif + + // Needed for MessageBox handling + const ContextID fContextID; +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_Context_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/ContextOptions.h b/gfx/skia/skia/include/gpu/graphite/ContextOptions.h new file mode 100644 index 0000000000..2838f10b0d --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/ContextOptions.h @@ -0,0 +1,87 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_ContextOptions_DEFINED +#define skgpu_graphite_ContextOptions_DEFINED + +namespace skgpu { class ShaderErrorHandler; } + +namespace skgpu::graphite { + +struct SK_API ContextOptions { + ContextOptions() {} + + /** + * Disables correctness workarounds that are enabled for particular GPUs, OSes, or drivers. + * This does not affect code path choices that are made for perfomance reasons nor does it + * override other ContextOption settings. + */ + bool fDisableDriverCorrectnessWorkarounds = false; + + /** + * If present, use this object to report shader compilation failures. If not, report failures + * via SkDebugf and assert. + */ + skgpu::ShaderErrorHandler* fShaderErrorHandler = nullptr; + + /** + * Will the client make sure to only ever be executing one thread that uses the Context and all + * derived classes (e.g. Recorders, Recordings, etc.) at a time. If so we can possibly make some + * objects (e.g. VulkanMemoryAllocator) not thread safe to improve single thread performance. + */ + bool fClientWillExternallySynchronizeAllThreads = false; + + /** + * The maximum size of cache textures used for Skia's Glyph cache. + */ + size_t fGlyphCacheTextureMaximumBytes = 2048 * 1024 * 4; + + /** + * Below this threshold size in device space distance field fonts won't be used. Distance field + * fonts don't support hinting which is more important at smaller sizes. + */ + float fMinDistanceFieldFontSize = 18; + + /** + * Above this threshold size in device space glyphs are drawn as individual paths. + */ +#if defined(SK_BUILD_FOR_ANDROID) + float fGlyphsAsPathsFontSize = 384; +#elif defined(SK_BUILD_FOR_MAC) + float fGlyphsAsPathsFontSize = 256; +#else + float fGlyphsAsPathsFontSize = 324; +#endif + + /** + * Can the glyph atlas use multiple textures. If allowed, the each texture's size is bound by + * fGlypheCacheTextureMaximumBytes. + */ + bool fAllowMultipleGlyphCacheTextures = true; + bool fSupportBilerpFromGlyphAtlas = false; + +#if GRAPHITE_TEST_UTILS + /** + * Private options that are only meant for testing within Skia's tools. + */ + + /** + * Maximum width and height of internal texture atlases. + */ + int fMaxTextureAtlasSize = 2048; + + /** + * If true, will store a pointer in Recorder that points back to the Context + * that created it. Used by readPixels() and other methods that normally require a Context. + */ + bool fStoreContextRefInRecorder = false; +#endif +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_ContextOptions diff --git a/gfx/skia/skia/include/gpu/graphite/GraphiteTypes.h b/gfx/skia/skia/include/gpu/graphite/GraphiteTypes.h new file mode 100644 index 0000000000..231f2a5e14 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/GraphiteTypes.h @@ -0,0 +1,105 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_GraphiteTypes_DEFINED +#define skgpu_graphite_GraphiteTypes_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "include/gpu/GpuTypes.h" + +#include + +class SkSurface; + +namespace skgpu::graphite { + +class Recording; +class Task; + +using GpuFinishedContext = void*; +using GpuFinishedProc = void (*)(GpuFinishedContext finishedContext, CallbackResult); + +/** + * The fFinishedProc is called when the Recording has been submitted and finished on the GPU, or + * when there is a failure that caused it not to be submitted. The callback will always be called + * and the caller can use the callback to know it is safe to free any resources associated with + * the Recording that they may be holding onto. If the Recording is successfully submitted to the + * GPU the callback will be called with CallbackResult::kSuccess once the GPU has finished. All + * other cases where some failure occured it will be called with CallbackResult::kFailed. + * + * The fTargetSurface, if provided, is used as a target for any draws recorded onto a deferred + * canvas returned from Recorder::makeDeferredCanvas. This target surface must be provided iff + * the Recording contains any such draws. It must be Graphite-backed and its backing texture's + * TextureInfo must match the info provided to the Recorder when making the deferred canvas. + * + * fTargetTranslation is an additional translation applied to draws targeting fTargetSurface. + */ +struct InsertRecordingInfo { + Recording* fRecording = nullptr; + + SkSurface* fTargetSurface = nullptr; + SkIVector fTargetTranslation = {0, 0}; + + GpuFinishedContext fFinishedContext = nullptr; + GpuFinishedProc fFinishedProc = nullptr; +}; + +/** + * The fFinishedProc is called when the Recording has been submitted and finished on the GPU, or + * when there is a failure that caused it not to be submitted. The callback will always be called + * and the caller can use the callback to know it is safe to free any resources associated with + * the Recording that they may be holding onto. If the Recording is successfully submitted to the + * GPU the callback will be called with CallbackResult::kSuccess once the GPU has finished. All + * other cases where some failure occured it will be called with CallbackResult::kFailed. + */ +struct InsertFinishInfo { + GpuFinishedContext fFinishedContext = nullptr; + GpuFinishedProc fFinishedProc = nullptr; +}; + +/** + * Actually submit work to the GPU and track its completion + */ +enum class SyncToCpu : bool { + kYes = true, + kNo = false +}; + +/* + * For Promise Images - should the Promise Image be fulfilled every time a Recording that references + * it is inserted into the Context. + */ +enum class Volatile : bool { + kNo = false, // only fulfilled once + kYes = true // fulfilled on every insertion call +}; + +/* + * Graphite's different rendering methods each only apply to certain types of draws. This + * enum supports decision-making regarding the different renderers and what is being drawn. + */ +enum DrawTypeFlags : uint8_t { + + kNone = 0b000, + + // SkCanvas:: drawSimpleText, drawString, drawGlyphs, drawTextBlob, drawSlug + kText = 0b001, + + // SkCanvas::drawVertices + kDrawVertices = 0b010, + + // All other canvas draw calls + kShape = 0b100, + + kMostCommon = kText | kShape, + kAll = kText | kDrawVertices | kShape +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_GraphiteTypes_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/ImageProvider.h b/gfx/skia/skia/include/gpu/graphite/ImageProvider.h new file mode 100644 index 0000000000..2773f03b1d --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/ImageProvider.h @@ -0,0 +1,60 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_ImageProvider_DEFINED +#define skgpu_graphite_ImageProvider_DEFINED + +#include "include/core/SkImage.h" +#include "include/core/SkRefCnt.h" + +namespace skgpu::graphite { + +class Recorder; + +/* + * This class provides a centralized location for clients to perform any caching of images + * they desire. Whenever Graphite encounters an SkImage which is not Graphite-backed + * it will call ImageProvider::findOrCreate. The client's derived version of this class should + * return a Graphite-backed version of the provided SkImage that meets the specified + * requirements. + * + * Skia requires that 'findOrCreate' return a Graphite-backed image that preserves the dimensions, + * number of channels and alpha type of the original image. The bit depth of the + * individual channels can change (e.g., 4444 -> 8888 is allowed). + * Wrt mipmapping, the returned image can have different mipmap settings than requested. If + * mipmapping was requested but not returned, the sampling level will be reduced to linear. + * If the requirements are not met by the returned image (modulo the flexibility wrt mipmapping) + * Graphite will drop the draw. + * + * Note: by default, Graphite will not perform any caching of images + * + * Threading concerns: + * If the same ImageProvider is given to multiple Recorders it is up to the + * client to handle any required thread synchronization. This is not limited to just + * restricting access to whatever map a derived class may have but extends to ensuring + * that an image created on one Recorder has had its creation work submitted before it + * is used by any work submitted by another Recording. Please note, this requirement + * (re the submission of creation work and image usage on different threads) is common to all + * graphite SkImages and isn't unique to SkImages returned by the ImageProvider. + * + * TODO(b/240996632): add documentation re shutdown order. + * TODO(b/240997067): add unit tests + */ +class SK_API ImageProvider : public SkRefCnt { +public: + // If the client's derived class already has a Graphite-backed image that has the same + // contents as 'image' and meets the requirements, then it can be returned. + // makeTextureImage can always be called to create an acceptable Graphite-backed image + // which could then be cached. + virtual sk_sp findOrCreate(Recorder* recorder, + const SkImage* image, + SkImage::RequiredImageProperties) = 0; +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_ImageProvider_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/Recorder.h b/gfx/skia/skia/include/gpu/graphite/Recorder.h new file mode 100644 index 0000000000..b27f682d2d --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/Recorder.h @@ -0,0 +1,212 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_Recorder_DEFINED +#define skgpu_graphite_Recorder_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/gpu/graphite/Recording.h" +#include "include/private/base/SingleOwner.h" +#include "include/private/base/SkTArray.h" + +#include + +class SkCanvas; +struct SkImageInfo; +class SkPixmap; + +namespace skgpu { +class RefCntedCallback; +class TokenTracker; +} + +namespace sktext::gpu { +class StrikeCache; +class TextBlobRedrawCoordinator; +} + +namespace skgpu::graphite { + +class AtlasManager; +class BackendTexture; +class Caps; +class Context; +class Device; +class DrawBufferManager; +class GlobalCache; +class ImageProvider; +class RecorderPriv; +class ResourceProvider; +class RuntimeEffectDictionary; +class SharedContext; +class Task; +class TaskGraph; +class TextureDataBlock; +class TextureInfo; +class UniformDataBlock; +class UploadBufferManager; + +template class PipelineDataCache; +using UniformDataCache = PipelineDataCache; +using TextureDataCache = PipelineDataCache; + +struct SK_API RecorderOptions final { + RecorderOptions(); + RecorderOptions(const RecorderOptions&); + ~RecorderOptions(); + + sk_sp fImageProvider; +}; + +class SK_API Recorder final { +public: + Recorder(const Recorder&) = delete; + Recorder(Recorder&&) = delete; + Recorder& operator=(const Recorder&) = delete; + Recorder& operator=(Recorder&&) = delete; + + ~Recorder(); + + std::unique_ptr snap(); + + ImageProvider* clientImageProvider() { return fClientImageProvider.get(); } + const ImageProvider* clientImageProvider() const { return fClientImageProvider.get(); } + + /** + * Creates a new backend gpu texture matching the dimensions and TextureInfo. If an invalid + * TextureInfo or a TextureInfo Skia can't support is passed in, this will return an invalid + * BackendTexture. Thus the client should check isValid on the returned BackendTexture to know + * if it succeeded or not. + * + * If this does return a valid BackendTexture, the caller is required to use + * Recorder::deleteBackendTexture or Context::deleteBackendTexture to delete the texture. It is + * safe to use the Context that created this Recorder or any other Recorder created from the + * same Context to call deleteBackendTexture. + */ + BackendTexture createBackendTexture(SkISize dimensions, const TextureInfo&); + + /** + * If possible, updates a backend texture with the provided pixmap data. The client + * should check the return value to see if the update was successful. The client is required + * to insert a Recording into the Context and call `submit` to send the upload work to the gpu. + * The backend texture must be compatible with the provided pixmap(s). Compatible, in this case, + * means that the backend format is compatible with the base pixmap's colortype. The src data + * can be deleted when this call returns. + * If the backend texture is mip mapped, the data for all the mipmap levels must be provided. + * In the mipmapped case all the colortypes of the provided pixmaps must be the same. + * Additionally, all the miplevels must be sized correctly (please see + * SkMipmap::ComputeLevelSize and ComputeLevelCount). + * Note: the pixmap's alphatypes and colorspaces are ignored. + * For the Vulkan backend after a successful update the layout of the created VkImage will be: + * VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL + */ + bool updateBackendTexture(const BackendTexture&, + const SkPixmap srcData[], + int numLevels); + + /** + * Called to delete the passed in BackendTexture. This should only be called if the + * BackendTexture was created by calling Recorder::createBackendTexture on a Recorder that is + * associated with the same Context. If the BackendTexture is not valid or does not match the + * BackendApi of the Recorder then nothing happens. + * + * Otherwise this will delete/release the backend object that is wrapped in the BackendTexture. + * The BackendTexture will be reset to an invalid state and should not be used again. + */ + void deleteBackendTexture(BackendTexture&); + + // Adds a proc that will be moved to the Recording upon snap, subsequently attached to the + // CommandBuffer when the Recording is added, and called when that CommandBuffer is submitted + // and finishes. If the Recorder or Recording is deleted before the proc is added to the + // CommandBuffer, it will be called with result Failure. + void addFinishInfo(const InsertFinishInfo&); + + // Returns a canvas that will record to a proxy surface, which must be instantiated on replay. + // This can only be called once per Recording; subsequent calls will return null until a + // Recording is snapped. Additionally, the returned SkCanvas is only valid until the next + // Recording snap, at which point it is deleted. + SkCanvas* makeDeferredCanvas(const SkImageInfo&, const TextureInfo&); + + // Provides access to functions that aren't part of the public API. + RecorderPriv priv(); + const RecorderPriv priv() const; // NOLINT(readability-const-return-type) + +#if GR_TEST_UTILS + bool deviceIsRegistered(Device*); +#endif + +private: + friend class Context; // For ctor + friend class Device; // For registering and deregistering Devices; + friend class RecorderPriv; // for ctor and hidden methods + + Recorder(sk_sp, const RecorderOptions&); + + SingleOwner* singleOwner() const { return &fSingleOwner; } + + BackendApi backend() const; + + // We keep track of all Devices that are connected to a Recorder. This allows the client to + // safely delete an SkSurface or a Recorder in any order. If the client deletes the Recorder + // we need to notify all Devices that the Recorder is no longer valid. If we delete the + // SkSurface/Device first we will flush all the Device's into the Recorder before deregistering + // it from the Recorder. + // + // We do not need to take a ref on the Device since the Device will flush and deregister itself + // in its dtor. There is no other need for the Recorder to know about the Device after this + // point. + // + // Note: We could probably get by with only registering Devices directly connected to + // SkSurfaces. All other one off Devices will be created in a controlled scope where the + // Recorder should still be valid by the time they need to flush their work when the Device is + // deleted. We would have to make sure we safely handle cases where a client calls saveLayer + // then either deletes the SkSurface or Recorder before calling restore. For simplicity we just + // register every device for now, but if we see extra overhead in pushing back the extra + // pointers, we can look into only registering SkSurface Devices. + void registerDevice(Device*); + void deregisterDevice(const Device*); + + sk_sp fSharedContext; + std::unique_ptr fResourceProvider; + std::unique_ptr fRuntimeEffectDict; + + std::unique_ptr fGraph; + std::unique_ptr fUniformDataCache; + std::unique_ptr fTextureDataCache; + std::unique_ptr fDrawBufferManager; + std::unique_ptr fUploadBufferManager; + std::vector fTrackedDevices; + + uint32_t fRecorderID; // Needed for MessageBox handling for text + std::unique_ptr fAtlasManager; + std::unique_ptr fTokenTracker; + std::unique_ptr fStrikeCache; + std::unique_ptr fTextBlobCache; + sk_sp fClientImageProvider; + + // In debug builds we guard against improper thread handling + // This guard is passed to the ResourceCache. + // TODO: Should we also pass this to Device, DrawContext, and similar classes? + mutable SingleOwner fSingleOwner; + + sk_sp fTargetProxyDevice; + std::unique_ptr fTargetProxyCanvas; + std::unique_ptr fTargetProxyData; + + SkTArray> fFinishedProcs; + +#if GRAPHITE_TEST_UTILS + // For testing use only -- the Context used to create this Recorder + Context* fContext = nullptr; +#endif +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_Recorder_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/Recording.h b/gfx/skia/skia/include/gpu/graphite/Recording.h new file mode 100644 index 0000000000..6a94ab84b8 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/Recording.h @@ -0,0 +1,96 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_Recording_DEFINED +#define skgpu_graphite_Recording_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/private/SkChecksum.h" +#include "include/private/base/SkTArray.h" + +#include +#include +#include + +namespace skgpu { +class RefCntedCallback; +} + +namespace skgpu::graphite { + +class CommandBuffer; +class RecordingPriv; +class Resource; +class ResourceProvider; +class TaskGraph; +class Texture; +class TextureInfo; +class TextureProxy; + +class Recording final { +public: + ~Recording(); + + RecordingPriv priv(); + +#if GRAPHITE_TEST_UTILS + bool isTargetProxyInstantiated() const; +#endif + +private: + friend class Recorder; // for ctor and LazyProxyData + friend class RecordingPriv; + + // LazyProxyData is used if this recording should be replayed to a target that is provided on + // replay, and it handles the target proxy's instantiation with the provided target. + class LazyProxyData { + public: + LazyProxyData(const TextureInfo&); + + TextureProxy* lazyProxy(); + sk_sp refLazyProxy(); + + bool lazyInstantiate(ResourceProvider*, sk_sp); + + private: + sk_sp fTarget; + sk_sp fTargetProxy; + }; + + struct ProxyHash { + std::size_t operator()(const sk_sp& proxy) const { + return SkGoodHash()(proxy.get()); + } + }; + + Recording(std::unique_ptr, + std::unordered_set, ProxyHash>&& nonVolatileLazyProxies, + std::unordered_set, ProxyHash>&& volatileLazyProxies, + std::unique_ptr targetProxyData, + SkTArray>&& finishedProcs); + + bool addCommands(CommandBuffer*, ResourceProvider*); + void addResourceRef(sk_sp); + + std::unique_ptr fGraph; + // We don't always take refs to all resources used by specific Tasks (e.g. a common buffer used + // for uploads). Instead we'll just hold onto one ref for those Resources outside the Tasks. + // Those refs are stored in the array here and will eventually be passed onto a CommandBuffer + // when the Recording adds its commands. + std::vector> fExtraResourceRefs; + + std::unordered_set, ProxyHash> fNonVolatileLazyProxies; + std::unordered_set, ProxyHash> fVolatileLazyProxies; + + std::unique_ptr fTargetProxyData; + + SkTArray> fFinishedProcs; +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_Recording_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/TextureInfo.h b/gfx/skia/skia/include/gpu/graphite/TextureInfo.h new file mode 100644 index 0000000000..dd4e6698c3 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/TextureInfo.h @@ -0,0 +1,162 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_TextureInfo_DEFINED +#define skgpu_graphite_TextureInfo_DEFINED + +#include "include/gpu/graphite/GraphiteTypes.h" + +#ifdef SK_DAWN +#include "include/private/gpu/graphite/DawnTypesPriv.h" +#endif + +#ifdef SK_METAL +#include "include/private/gpu/graphite/MtlGraphiteTypesPriv.h" +#endif + +#ifdef SK_VULKAN +#include "include/private/gpu/graphite/VulkanGraphiteTypesPriv.h" +#endif + +namespace skgpu::graphite { + +class TextureInfo { +public: + TextureInfo() {} +#ifdef SK_DAWN + TextureInfo(const DawnTextureInfo& dawnInfo) + : fBackend(BackendApi::kDawn) + , fValid(true) + , fSampleCount(dawnInfo.fSampleCount) + , fMipmapped(dawnInfo.fMipmapped) + , fProtected(Protected::kNo) + , fDawnSpec(dawnInfo) {} +#endif + +#ifdef SK_METAL + TextureInfo(const MtlTextureInfo& mtlInfo) + : fBackend(BackendApi::kMetal) + , fValid(true) + , fSampleCount(mtlInfo.fSampleCount) + , fMipmapped(mtlInfo.fMipmapped) + , fProtected(Protected::kNo) + , fMtlSpec(mtlInfo) {} +#endif + +#ifdef SK_VULKAN + TextureInfo(const VulkanTextureInfo& vkInfo) + : fBackend(BackendApi::kVulkan) + , fValid(true) + , fSampleCount(vkInfo.fSampleCount) + , fMipmapped(vkInfo.fMipmapped) + , fProtected(Protected::kNo) + , fVkSpec(vkInfo) { + if (vkInfo.fFlags & VK_IMAGE_CREATE_PROTECTED_BIT) { + fProtected = Protected::kYes; + } + } +#endif + + ~TextureInfo() {} + TextureInfo(const TextureInfo&) = default; + TextureInfo& operator=(const TextureInfo&); + + bool operator==(const TextureInfo&) const; + bool operator!=(const TextureInfo& that) const { return !(*this == that); } + + bool isValid() const { return fValid; } + BackendApi backend() const { return fBackend; } + + uint32_t numSamples() const { return fSampleCount; } + Mipmapped mipmapped() const { return fMipmapped; } + Protected isProtected() const { return fProtected; } + +#ifdef SK_DAWN + bool getDawnTextureInfo(DawnTextureInfo* info) const { + if (!this->isValid() || fBackend != BackendApi::kDawn) { + return false; + } + *info = DawnTextureSpecToTextureInfo(fDawnSpec, fSampleCount, fMipmapped); + return true; + } +#endif + +#ifdef SK_METAL + bool getMtlTextureInfo(MtlTextureInfo* info) const { + if (!this->isValid() || fBackend != BackendApi::kMetal) { + return false; + } + *info = MtlTextureSpecToTextureInfo(fMtlSpec, fSampleCount, fMipmapped); + return true; + } +#endif + +#ifdef SK_VULKAN + bool getVulkanTextureInfo(VulkanTextureInfo* info) const { + if (!this->isValid() || fBackend != BackendApi::kVulkan) { + return false; + } + *info = VulkanTextureSpecToTextureInfo(fVkSpec, fSampleCount, fMipmapped); + return true; + } +#endif + +private: +#ifdef SK_DAWN + friend class DawnCaps; + friend class DawnCommandBuffer; + friend class DawnGraphicsPipeline; + friend class DawnResourceProvider; + friend class DawnTexture; + const DawnTextureSpec& dawnTextureSpec() const { + SkASSERT(fValid && fBackend == BackendApi::kDawn); + return fDawnSpec; + } +#endif + +#ifdef SK_METAL + friend class MtlCaps; + friend class MtlGraphicsPipeline; + friend class MtlTexture; + const MtlTextureSpec& mtlTextureSpec() const { + SkASSERT(fValid && fBackend == BackendApi::kMetal); + return fMtlSpec; + } +#endif + +#ifdef SK_VULKAN + friend class VulkanCaps; + friend class VulkanTexture; + const VulkanTextureSpec& vulkanTextureSpec() const { + SkASSERT(fValid && fBackend == BackendApi::kVulkan); + return fVkSpec; + } +#endif + + BackendApi fBackend = BackendApi::kMock; + bool fValid = false; + + uint32_t fSampleCount = 1; + Mipmapped fMipmapped = Mipmapped::kNo; + Protected fProtected = Protected::kNo; + + union { +#ifdef SK_DAWN + DawnTextureSpec fDawnSpec; +#endif +#ifdef SK_METAL + MtlTextureSpec fMtlSpec; +#endif +#ifdef SK_VULKAN + VulkanTextureSpec fVkSpec; +#endif + }; +}; + +} // namespace skgpu::graphite + +#endif //skgpu_graphite_TextureInfo_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/YUVABackendTextures.h b/gfx/skia/skia/include/gpu/graphite/YUVABackendTextures.h new file mode 100644 index 0000000000..c3b80ae196 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/YUVABackendTextures.h @@ -0,0 +1,139 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_YUVABackendTextures_DEFINED +#define skgpu_graphite_YUVABackendTextures_DEFINED + +#include "include/core/SkSpan.h" +#include "include/core/SkYUVAInfo.h" +#include "include/gpu/graphite/BackendTexture.h" + +#include + +namespace skgpu::graphite { +class Recorder; + +/** + * A description of a set of BackendTextures that hold the planar data described by a SkYUVAInfo. + */ +class SK_API YUVABackendTextureInfo { +public: + static constexpr auto kMaxPlanes = SkYUVAInfo::kMaxPlanes; + + /** Default YUVABackendTextureInfo is invalid. */ + YUVABackendTextureInfo() = default; + YUVABackendTextureInfo(const YUVABackendTextureInfo&) = default; + YUVABackendTextureInfo& operator=(const YUVABackendTextureInfo&) = default; + + /** + * Initializes a YUVABackendTextureInfo to describe a set of textures that can store the + * planes indicated by the SkYUVAInfo. The texture dimensions are taken from the SkYUVAInfo's + * plane dimensions. All the described textures share a common origin. The planar image this + * describes will be mip mapped if all the textures are individually mip mapped as indicated + * by Mipmapped. This will produce an invalid result (return false from isValid()) if the + * passed formats' channels don't agree with SkYUVAInfo. + */ + YUVABackendTextureInfo(const Recorder*, + const SkYUVAInfo&, + const TextureInfo[kMaxPlanes], + Mipmapped); + + bool operator==(const YUVABackendTextureInfo&) const; + bool operator!=(const YUVABackendTextureInfo& that) const { return !(*this == that); } + + /** TextureInfo for the ith plane, or invalid if i >= numPlanes() */ + const TextureInfo& planeTextureInfo(int i) const { + SkASSERT(i >= 0); + return fPlaneTextureInfos[static_cast(i)]; + } + + const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; } + + SkYUVColorSpace yuvColorSpace() const { return fYUVAInfo.yuvColorSpace(); } + + Mipmapped mipmapped() const { return fMipmapped; } + + /** The number of planes, 0 if this YUVABackendTextureInfo is invalid. */ + int numPlanes() const { return fYUVAInfo.numPlanes(); } + + /** + * Returns true if this has been configured with a valid SkYUVAInfo with compatible texture + * formats. + */ + bool isValid() const { return fYUVAInfo.isValid(); } + + /** + * Computes a YUVALocations representation of the planar layout. The result is guaranteed to be + * valid if this->isValid(). + */ + SkYUVAInfo::YUVALocations toYUVALocations() const; + +private: + SkYUVAInfo fYUVAInfo; + std::array fPlaneTextureInfos; + std::array fPlaneChannelMasks; + Mipmapped fMipmapped = Mipmapped::kNo; +}; + +/** + * A set of BackendTextures that hold the planar data for an image described a SkYUVAInfo. + */ +class SK_API YUVABackendTextures { +public: + static constexpr auto kMaxPlanes = SkYUVAInfo::kMaxPlanes; + + YUVABackendTextures() = default; + YUVABackendTextures(const YUVABackendTextures&) = delete; + YUVABackendTextures& operator=(const YUVABackendTextures&) = delete; + + /** + * Initializes a YUVABackendTextures object from a set of textures that store the planes + * indicated by the SkYUVAInfo. This will produce an invalid result (return false from + * isValid()) if the passed texture formats' channels don't agree with SkYUVAInfo. + */ + YUVABackendTextures(const Recorder*, + const SkYUVAInfo&, + const BackendTexture[kMaxPlanes]); + + SkSpan planeTextures() const { + return SkSpan(fPlaneTextures); + } + + /** BackendTexture for the ith plane, or invalid if i >= numPlanes() */ + BackendTexture planeTexture(int i) const { + SkASSERT(i >= 0); + return fPlaneTextures[static_cast(i)]; + } + + const SkYUVAInfo& yuvaInfo() const { return fYUVAInfo; } + + SkYUVColorSpace yuvColorSpace() const { return fYUVAInfo.yuvColorSpace(); } + + /** The number of planes, 0 if this YUVABackendTextureInfo is invalid. */ + int numPlanes() const { return fYUVAInfo.numPlanes(); } + + /** + * Returns true if this has been configured with a valid SkYUVAInfo with compatible texture + * formats. + */ + bool isValid() const { return fYUVAInfo.isValid(); } + + /** + * Computes a YUVALocations representation of the planar layout. The result is guaranteed to be + * valid if this->isValid(). + */ + SkYUVAInfo::YUVALocations toYUVALocations() const; + +private: + SkYUVAInfo fYUVAInfo; + std::array fPlaneTextures; + std::array fPlaneChannelMasks; +}; + +} // End of namespace skgpu::graphite + +#endif // skgpu_graphite_YUVABackendTextures_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/dawn/DawnBackendContext.h b/gfx/skia/skia/include/gpu/graphite/dawn/DawnBackendContext.h new file mode 100644 index 0000000000..99282c4d76 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/dawn/DawnBackendContext.h @@ -0,0 +1,25 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_DawnBackendContext_DEFINED +#define skgpu_graphite_DawnBackendContext_DEFINED + +#include "webgpu/webgpu_cpp.h" + +namespace skgpu::graphite { + +// The DawnBackendContext contains all of the base Dawn objects needed by the graphite Dawn +// backend. The client will create this object and pass it into the Context::MakeDawn factory call +// when setting up Skia. +struct SK_API DawnBackendContext { + wgpu::Device fDevice; + wgpu::Queue fQueue; +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_DawnBackendContext_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/dawn/DawnTypes.h b/gfx/skia/skia/include/gpu/graphite/dawn/DawnTypes.h new file mode 100644 index 0000000000..291be75630 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/dawn/DawnTypes.h @@ -0,0 +1,40 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_DawnTypes_DEFINED +#define skgpu_graphite_DawnTypes_DEFINED + +#include "include/gpu/graphite/GraphiteTypes.h" +#include "webgpu/webgpu_cpp.h" + +namespace skgpu::graphite { + +struct DawnTextureInfo { + uint32_t fSampleCount = 1; + Mipmapped fMipmapped = Mipmapped::kNo; + + // wgpu::TextureDescriptor properties + wgpu::TextureFormat fFormat = wgpu::TextureFormat::Undefined; + wgpu::TextureUsage fUsage = wgpu::TextureUsage::None; + + DawnTextureInfo() = default; + DawnTextureInfo(const wgpu::Texture& texture); + DawnTextureInfo(uint32_t sampleCount, + Mipmapped mipmapped, + wgpu::TextureFormat format, + wgpu::TextureUsage usage) + : fSampleCount(sampleCount) + , fMipmapped(mipmapped) + , fFormat(format) + , fUsage(usage) {} +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_DawnTypes_DEFINED + + diff --git a/gfx/skia/skia/include/gpu/graphite/dawn/DawnUtils.h b/gfx/skia/skia/include/gpu/graphite/dawn/DawnUtils.h new file mode 100644 index 0000000000..ef1b57c9e0 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/dawn/DawnUtils.h @@ -0,0 +1,26 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_DawnUtils_DEFINED +#define skgpu_graphite_DawnUtils_DEFINED + +#include + +namespace skgpu::graphite { + +class Context; +struct ContextOptions; +struct DawnBackendContext; + +namespace ContextFactory { +std::unique_ptr MakeDawn(const DawnBackendContext&, const ContextOptions&); +} // namespace ContextFactory + +} // namespace skgpu::graphite + + +#endif // skgpu_graphite_DawnUtils_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/mtl/MtlBackendContext.h b/gfx/skia/skia/include/gpu/graphite/mtl/MtlBackendContext.h new file mode 100644 index 0000000000..9d6d0192d1 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/mtl/MtlBackendContext.h @@ -0,0 +1,25 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_MtlBackendContext_DEFINED +#define skgpu_graphite_MtlBackendContext_DEFINED + +#include "include/gpu/graphite/mtl/MtlGraphiteTypes.h" + +namespace skgpu::graphite { + +// The MtlBackendContext contains all of the base Metal objects needed by the graphite Metal +// backend. The client will create this object and pass it into the Context::MakeMetal factory call +// when setting up Skia. +struct SK_API MtlBackendContext { + sk_cfp fDevice; + sk_cfp fQueue; +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_MtlBackendContext_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/mtl/MtlGraphiteTypes.h b/gfx/skia/skia/include/gpu/graphite/mtl/MtlGraphiteTypes.h new file mode 100644 index 0000000000..bc04421643 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/mtl/MtlGraphiteTypes.h @@ -0,0 +1,69 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_MtlGraphiteTypes_DEFINED +#define skgpu_graphite_MtlGraphiteTypes_DEFINED + +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/ports/SkCFObject.h" + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef __APPLE__ + +#include +#include + +#if TARGET_OS_SIMULATOR +#define SK_API_AVAILABLE_CA_METAL_LAYER SK_API_AVAILABLE(macos(10.11), ios(13.0)) +#else // TARGET_OS_SIMULATOR +#define SK_API_AVAILABLE_CA_METAL_LAYER SK_API_AVAILABLE(macos(10.11), ios(8.0)) +#endif // TARGET_OS_SIMULATOR + +#endif // __APPLE__ + + +namespace skgpu::graphite { + +/** + * Declares typedefs for Metal types used in Graphite cpp code + */ +using MtlPixelFormat = unsigned int; +using MtlTextureUsage = unsigned int; +using MtlStorageMode = unsigned int; +using MtlHandle = const void*; + +struct MtlTextureInfo { + uint32_t fSampleCount = 1; + skgpu::Mipmapped fMipmapped = skgpu::Mipmapped::kNo; + + // Since we aren't in an Obj-C header we can't directly use Mtl types here. Each of these can + // cast to their mapped Mtl types list below. + MtlPixelFormat fFormat = 0; // MTLPixelFormat fFormat = MTLPixelFormatInvalid; + MtlTextureUsage fUsage = 0; // MTLTextureUsage fUsage = MTLTextureUsageUnknown; + MtlStorageMode fStorageMode = 0; // MTLStorageMode fStorageMode = MTLStorageModeShared; + bool fFramebufferOnly = false; + + MtlTextureInfo() = default; + MtlTextureInfo(MtlHandle mtlTexture); + MtlTextureInfo(uint32_t sampleCount, + skgpu::Mipmapped mipmapped, + MtlPixelFormat format, + MtlTextureUsage usage, + MtlStorageMode storageMode, + bool framebufferOnly) + : fSampleCount(sampleCount) + , fMipmapped(mipmapped) + , fFormat(format) + , fUsage(usage) + , fStorageMode(storageMode) + , fFramebufferOnly(framebufferOnly) {} +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_MtlGraphiteTypes_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/mtl/MtlGraphiteUtils.h b/gfx/skia/skia/include/gpu/graphite/mtl/MtlGraphiteUtils.h new file mode 100644 index 0000000000..681f0867ae --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/mtl/MtlGraphiteUtils.h @@ -0,0 +1,25 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_MtlGraphiteUtils_DEFINED +#define skgpu_graphite_MtlGraphiteUtils_DEFINED + +#include + +namespace skgpu::graphite { + +class Context; +struct ContextOptions; +struct MtlBackendContext; + +namespace ContextFactory { +std::unique_ptr MakeMetal(const MtlBackendContext&, const ContextOptions&); +} // namespace ContextFactory + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_MtlGraphiteUtils_DEFINED diff --git a/gfx/skia/skia/include/gpu/graphite/vk/VulkanGraphiteTypes.h b/gfx/skia/skia/include/gpu/graphite/vk/VulkanGraphiteTypes.h new file mode 100644 index 0000000000..bd448d2ca6 --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/vk/VulkanGraphiteTypes.h @@ -0,0 +1,64 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_VulkanGraphiteTypes_DEFINED +#define skgpu_graphite_VulkanGraphiteTypes_DEFINED + +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/gpu/vk/VulkanTypes.h" + +namespace skgpu::graphite { + +struct VulkanTextureInfo { + uint32_t fSampleCount = 1; + Mipmapped fMipmapped = Mipmapped::kNo; + + // VkImageCreateInfo properties + // Currently the only supported flag is VK_IMAGE_CREATE_PROTECTED_BIT. Any other flag will not + // be accepted + VkImageCreateFlags fFlags = 0; + VkFormat fFormat = VK_FORMAT_UNDEFINED; + VkImageTiling fImageTiling = VK_IMAGE_TILING_OPTIMAL; + VkImageUsageFlags fImageUsageFlags = 0; + VkSharingMode fSharingMode = VK_SHARING_MODE_EXCLUSIVE; + + // Properties related to the image view and sampling. These are less inherent properties of the + // VkImage but describe how the VkImage should be used within Skia. + + // What aspect to use for the VkImageView. The normal, default is VK_IMAGE_ASPECT_COLOR_BIT. + // However, if the VkImage is a Ycbcr format, the client can pass a specific plan here to have + // Skia directly sample a plane. In that case the client should also pass in a VkFormat that is + // compatible with the plane as described by the Vulkan spec. + VkImageAspectFlags fAspectMask = VK_IMAGE_ASPECT_COLOR_BIT; + // TODO: Either Make the ycbcr conversion info shareable with Ganesh or add a version for + // Graphite. + // GrVkYcbcrConversionInfo fYcbcrConversionInfo; + + VulkanTextureInfo() = default; + VulkanTextureInfo(uint32_t sampleCount, + Mipmapped mipmapped, + VkImageCreateFlags flags, + VkFormat format, + VkImageTiling imageTiling, + VkImageUsageFlags imageUsageFlags, + VkSharingMode sharingMode, + VkImageAspectFlags aspectMask) + : fSampleCount(sampleCount) + , fMipmapped(mipmapped) + , fFlags(flags) + , fFormat(format) + , fImageTiling(imageTiling) + , fImageUsageFlags(imageUsageFlags) + , fSharingMode(sharingMode) + , fAspectMask(aspectMask) {} +}; + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_VulkanGraphiteTypes_DEFINED + + diff --git a/gfx/skia/skia/include/gpu/graphite/vk/VulkanGraphiteUtils.h b/gfx/skia/skia/include/gpu/graphite/vk/VulkanGraphiteUtils.h new file mode 100644 index 0000000000..07c76a332d --- /dev/null +++ b/gfx/skia/skia/include/gpu/graphite/vk/VulkanGraphiteUtils.h @@ -0,0 +1,26 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_VulkanGraphiteUtils_DEFINED +#define skgpu_graphite_VulkanGraphiteUtils_DEFINED + +#include + +namespace skgpu { struct VulkanBackendContext; } + +namespace skgpu::graphite { + +class Context; +struct ContextOptions; + +namespace ContextFactory { +std::unique_ptr MakeVulkan(const VulkanBackendContext&, const ContextOptions&); +} // namespace ContextFactory + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_VulkanGraphiteUtils_DEFINED diff --git a/gfx/skia/skia/include/gpu/mock/GrMockTypes.h b/gfx/skia/skia/include/gpu/mock/GrMockTypes.h new file mode 100644 index 0000000000..dfa648086c --- /dev/null +++ b/gfx/skia/skia/include/gpu/mock/GrMockTypes.h @@ -0,0 +1,146 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrMockOptions_DEFINED +#define GrMockOptions_DEFINED + +#include "include/core/SkTextureCompressionType.h" +#include "include/gpu/GpuTypes.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" + +class GrBackendFormat; + +struct GrMockTextureInfo { + GrMockTextureInfo() + : fColorType(GrColorType::kUnknown) + , fCompressionType(SkTextureCompressionType::kNone) + , fID(0) {} + + GrMockTextureInfo(GrColorType colorType, + SkTextureCompressionType compressionType, + int id) + : fColorType(colorType) + , fCompressionType(compressionType) + , fID(id) { + SkASSERT(fID); + if (fCompressionType != SkTextureCompressionType::kNone) { + SkASSERT(colorType == GrColorType::kUnknown); + } + } + + bool operator==(const GrMockTextureInfo& that) const { + return fColorType == that.fColorType && + fCompressionType == that.fCompressionType && + fID == that.fID; + } + + GrBackendFormat getBackendFormat() const; + + SkTextureCompressionType compressionType() const { return fCompressionType; } + + GrColorType colorType() const { + SkASSERT(fCompressionType == SkTextureCompressionType::kNone); + return fColorType; + } + + int id() const { return fID; } + +private: + GrColorType fColorType; + SkTextureCompressionType fCompressionType; + int fID; +}; + +struct GrMockRenderTargetInfo { + GrMockRenderTargetInfo() + : fColorType(GrColorType::kUnknown) + , fID(0) {} + + GrMockRenderTargetInfo(GrColorType colorType, int id) + : fColorType(colorType) + , fID(id) { + SkASSERT(fID); + } + + bool operator==(const GrMockRenderTargetInfo& that) const { + return fColorType == that.fColorType && + fID == that.fID; + } + + GrBackendFormat getBackendFormat() const; + + GrColorType colorType() const { return fColorType; } + +private: + GrColorType fColorType; + int fID; +}; + +struct GrMockSurfaceInfo { + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + skgpu::Protected fProtected = skgpu::Protected::kNo; + + GrColorType fColorType = GrColorType::kUnknown; + SkTextureCompressionType fCompressionType = SkTextureCompressionType::kNone; +}; + +static constexpr int kSkTextureCompressionTypeCount = static_cast(SkTextureCompressionType::kLast) + 1; + +/** + * A pointer to this type is used as the GrBackendContext when creating a Mock GrContext. It can be + * used to specify capability options for the mock context. If nullptr is used a default constructed + * GrMockOptions is used. + */ +struct GrMockOptions { + GrMockOptions() { + using Renderability = ConfigOptions::Renderability; + // By default RGBA_8888 and BGRA_8888 are textureable and renderable and + // A8 and RGB565 are texturable. + fConfigOptions[(int)GrColorType::kRGBA_8888].fRenderability = Renderability::kNonMSAA; + fConfigOptions[(int)GrColorType::kRGBA_8888].fTexturable = true; + fConfigOptions[(int)GrColorType::kAlpha_8].fTexturable = true; + fConfigOptions[(int)GrColorType::kBGR_565].fTexturable = true; + + fConfigOptions[(int)GrColorType::kBGRA_8888] = fConfigOptions[(int)GrColorType::kRGBA_8888]; + + fCompressedOptions[(int)SkTextureCompressionType::kETC2_RGB8_UNORM].fTexturable = true; + fCompressedOptions[(int)SkTextureCompressionType::kBC1_RGB8_UNORM].fTexturable = true; + fCompressedOptions[(int)SkTextureCompressionType::kBC1_RGBA8_UNORM].fTexturable = true; + } + + struct ConfigOptions { + enum Renderability { kNo, kNonMSAA, kMSAA }; + Renderability fRenderability = kNo; + bool fTexturable = false; + }; + + // GrCaps options. + bool fMipmapSupport = false; + bool fDrawInstancedSupport = false; + bool fHalfFloatVertexAttributeSupport = false; + uint32_t fMapBufferFlags = 0; + int fMaxTextureSize = 2048; + int fMaxRenderTargetSize = 2048; + int fMaxWindowRectangles = 0; + int fMaxVertexAttributes = 16; + ConfigOptions fConfigOptions[kGrColorTypeCnt]; + ConfigOptions fCompressedOptions[kSkTextureCompressionTypeCount]; + + // GrShaderCaps options. + bool fIntegerSupport = false; + bool fFlatInterpolationSupport = false; + int fMaxVertexSamplers = 0; + int fMaxFragmentSamplers = 8; + bool fShaderDerivativeSupport = true; + bool fDualSourceBlendingSupport = false; + + // GrMockGpu options. + bool fFailTextureAllocations = false; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/mtl/GrMtlBackendContext.h b/gfx/skia/skia/include/gpu/mtl/GrMtlBackendContext.h new file mode 100644 index 0000000000..0d88f479ac --- /dev/null +++ b/gfx/skia/skia/include/gpu/mtl/GrMtlBackendContext.h @@ -0,0 +1,21 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrMtlBackendContext_DEFINED +#define GrMtlBackendContext_DEFINED + +#include "include/gpu/mtl/GrMtlTypes.h" + +// The BackendContext contains all of the base Metal objects needed by the GrMtlGpu. The assumption +// is that the client will set these up and pass them to the GrMtlGpu constructor. +struct SK_API GrMtlBackendContext { + sk_cfp fDevice; + sk_cfp fQueue; + sk_cfp fBinaryArchive; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/mtl/GrMtlTypes.h b/gfx/skia/skia/include/gpu/mtl/GrMtlTypes.h new file mode 100644 index 0000000000..7c0d620e06 --- /dev/null +++ b/gfx/skia/skia/include/gpu/mtl/GrMtlTypes.h @@ -0,0 +1,63 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrMtlTypes_DEFINED +#define GrMtlTypes_DEFINED + +#include "include/gpu/GpuTypes.h" +#include "include/ports/SkCFObject.h" + +/** + * Declares typedefs for Metal types used in Ganesh cpp code + */ +using GrMTLPixelFormat = unsigned int; +using GrMTLTextureUsage = unsigned int; +using GrMTLStorageMode = unsigned int; +using GrMTLHandle = const void*; + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef __APPLE__ + +#include + +#if TARGET_OS_SIMULATOR +#define SK_API_AVAILABLE_CA_METAL_LAYER SK_API_AVAILABLE(macos(10.11), ios(13.0)) +#else // TARGET_OS_SIMULATOR +#define SK_API_AVAILABLE_CA_METAL_LAYER SK_API_AVAILABLE(macos(10.11), ios(8.0)) +#endif // TARGET_OS_SIMULATOR + +/** + * Types for interacting with Metal resources created externally to Skia. + * This is used by GrBackendObjects. + */ +struct GrMtlTextureInfo { +public: + GrMtlTextureInfo() {} + + sk_cfp fTexture; + + bool operator==(const GrMtlTextureInfo& that) const { + return fTexture == that.fTexture; + } +}; + +struct GrMtlSurfaceInfo { + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + skgpu::Protected fProtected = skgpu::Protected::kNo; + + // Since we aren't in an Obj-C header we can't directly use Mtl types here. Each of these can + // cast to their mapped Mtl types list below. + GrMTLPixelFormat fFormat = 0; // MTLPixelFormat fFormat = MTLPixelFormatInvalid; + GrMTLTextureUsage fUsage = 0; // MTLTextureUsage fUsage = MTLTextureUsageUnknown; + GrMTLStorageMode fStorageMode = 0; // MTLStorageMode fStorageMode = MTLStorageModeShared; +}; + +#endif + +#endif diff --git a/gfx/skia/skia/include/gpu/mtl/MtlMemoryAllocator.h b/gfx/skia/skia/include/gpu/mtl/MtlMemoryAllocator.h new file mode 100644 index 0000000000..425c461791 --- /dev/null +++ b/gfx/skia/skia/include/gpu/mtl/MtlMemoryAllocator.h @@ -0,0 +1,39 @@ +/* + * Copyright 2022 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_MtlMemoryAllocator_DEFINED +#define skgpu_MtlMemoryAllocator_DEFINED + +#ifdef __APPLE__ + +#ifdef __OBJC__ +#import +#endif + +namespace skgpu { + +// interface classes for the GPU memory allocator +class MtlAlloc : public SkRefCnt { +public: + ~MtlAlloc() override = default; +}; + +#ifdef __OBJC__ +class MtlMemoryAllocator : public SkRefCnt { +public: + virtual id newBufferWithLength(NSUInteger length, MTLResourceOptions options, + sk_sp* allocation) = 0; + virtual id newTextureWithDescriptor(MTLTextureDescriptor* texDesc, + sk_sp* allocation) = 0; +}; +#endif + +} // namespace skgpu + +#endif // __APPLE__ + +#endif // skgpu_MtlMemoryAllocator_DEFINED diff --git a/gfx/skia/skia/include/gpu/vk/GrVkBackendContext.h b/gfx/skia/skia/include/gpu/vk/GrVkBackendContext.h new file mode 100644 index 0000000000..23c1b0deaf --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/GrVkBackendContext.h @@ -0,0 +1,78 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrVkBackendContext_DEFINED +#define GrVkBackendContext_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/gpu/vk/GrVkTypes.h" +#include "include/gpu/vk/VulkanMemoryAllocator.h" + +namespace skgpu { class VulkanExtensions; } + +enum GrVkExtensionFlags { + kEXT_debug_report_GrVkExtensionFlag = 0x0001, + kNV_glsl_shader_GrVkExtensionFlag = 0x0002, + kKHR_surface_GrVkExtensionFlag = 0x0004, + kKHR_swapchain_GrVkExtensionFlag = 0x0008, + kKHR_win32_surface_GrVkExtensionFlag = 0x0010, + kKHR_android_surface_GrVkExtensionFlag = 0x0020, + kKHR_xcb_surface_GrVkExtensionFlag = 0x0040, +}; + +enum GrVkFeatureFlags { + kGeometryShader_GrVkFeatureFlag = 0x0001, + kDualSrcBlend_GrVkFeatureFlag = 0x0002, + kSampleRateShading_GrVkFeatureFlag = 0x0004, +}; + +// It is not guarenteed VkPhysicalDeviceProperties2 will be in the client's header so we forward +// declare it here to be safe. +struct VkPhysicalDeviceFeatures2; + +// The BackendContext contains all of the base Vulkan objects needed by the GrVkGpu. The assumption +// is that the client will set these up and pass them to the GrVkGpu constructor. The VkDevice +// created must support at least one graphics queue, which is passed in as well. +// The QueueFamilyIndex must match the family of the given queue. It is needed for CommandPool +// creation, and any GrBackendObjects handed to us (e.g., for wrapped textures) needs to be created +// in or transitioned to that family. The refs held by members of this struct must be released +// (either by deleting the struct or manually releasing the refs) before the underlying vulkan +// device and instance are destroyed. +struct SK_API GrVkBackendContext { + VkInstance fInstance = VK_NULL_HANDLE; + VkPhysicalDevice fPhysicalDevice = VK_NULL_HANDLE; + VkDevice fDevice = VK_NULL_HANDLE; + VkQueue fQueue = VK_NULL_HANDLE; + uint32_t fGraphicsQueueIndex = 0; + uint32_t fMinAPIVersion = 0; // Deprecated. Use fInstanceVersion + // instead. + uint32_t fInstanceVersion = 0; // Deprecated. Use fMaxApiVersion + // The max api version set here should match the value set in VkApplicationInfo::apiVersion when + // then VkInstance was created. + uint32_t fMaxAPIVersion = 0; + uint32_t fExtensions = 0; // Deprecated. Use fVkExtensions instead. + const skgpu::VulkanExtensions* fVkExtensions = nullptr; + uint32_t fFeatures = 0; // Deprecated. Use fDeviceFeatures[2] + // instead. + // The client can create their VkDevice with either a VkPhysicalDeviceFeatures or + // VkPhysicalDeviceFeatures2 struct, thus we have to support taking both. The + // VkPhysicalDeviceFeatures2 struct is needed so we know if the client enabled any extension + // specific features. If fDeviceFeatures2 is not null then we ignore fDeviceFeatures. If both + // fDeviceFeatures and fDeviceFeatures2 are null we will assume no features are enabled. + const VkPhysicalDeviceFeatures* fDeviceFeatures = nullptr; + const VkPhysicalDeviceFeatures2* fDeviceFeatures2 = nullptr; + sk_sp fMemoryAllocator; + skgpu::VulkanGetProc fGetProc = nullptr; + // This is deprecated and should be set to false. The client is responsible for managing the + // lifetime of the VkInstance and VkDevice objects. + bool fOwnsInstanceAndDevice = false; + // Indicates that we are working with protected content and all CommandPool and Queue operations + // should be done in a protected context. + skgpu::Protected fProtectedContext = skgpu::Protected::kNo; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/vk/GrVkExtensions.h b/gfx/skia/skia/include/gpu/vk/GrVkExtensions.h new file mode 100644 index 0000000000..b32cc16eb5 --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/GrVkExtensions.h @@ -0,0 +1,15 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrVkExtensions_DEFINED +#define GrVkExtensions_DEFINED + +#include "include/gpu/vk/VulkanExtensions.h" + +using GrVkExtensions = skgpu::VulkanExtensions; + +#endif diff --git a/gfx/skia/skia/include/gpu/vk/GrVkMemoryAllocator.h b/gfx/skia/skia/include/gpu/vk/GrVkMemoryAllocator.h new file mode 100644 index 0000000000..034e1f506c --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/GrVkMemoryAllocator.h @@ -0,0 +1,15 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrVkMemoryAllocator_DEFINED +#define GrVkMemoryAllocator_DEFINED + +#include "include/gpu/vk/VulkanMemoryAllocator.h" + +using GrVkMemoryAllocator = skgpu::VulkanMemoryAllocator; + +#endif diff --git a/gfx/skia/skia/include/gpu/vk/GrVkTypes.h b/gfx/skia/skia/include/gpu/vk/GrVkTypes.h new file mode 100644 index 0000000000..ae680a8af5 --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/GrVkTypes.h @@ -0,0 +1,149 @@ + +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrVkTypes_DEFINED +#define GrVkTypes_DEFINED + +#include "include/gpu/GpuTypes.h" +#include "include/gpu/vk/VulkanTypes.h" + +using GrVkBackendMemory = skgpu::VulkanBackendMemory; +using GrVkAlloc = skgpu::VulkanAlloc; + +// This struct is used to pass in the necessary information to create a VkSamplerYcbcrConversion +// object for an VkExternalFormatANDROID. +struct GrVkYcbcrConversionInfo { + bool operator==(const GrVkYcbcrConversionInfo& that) const { + // Invalid objects are not required to have all other fields initialized or matching. + if (!this->isValid() && !that.isValid()) { + return true; + } + return this->fFormat == that.fFormat && + this->fExternalFormat == that.fExternalFormat && + this->fYcbcrModel == that.fYcbcrModel && + this->fYcbcrRange == that.fYcbcrRange && + this->fXChromaOffset == that.fXChromaOffset && + this->fYChromaOffset == that.fYChromaOffset && + this->fChromaFilter == that.fChromaFilter && + this->fForceExplicitReconstruction == that.fForceExplicitReconstruction; + } + bool operator!=(const GrVkYcbcrConversionInfo& that) const { return !(*this == that); } + + bool isValid() const { return fYcbcrModel != VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY; } + + // Format of the source image. Must be set to VK_FORMAT_UNDEFINED for external images or + // a valid image format otherwise. + VkFormat fFormat = VK_FORMAT_UNDEFINED; + + // The external format. Must be non-zero for external images, zero otherwise. + // Should be compatible to be used in a VkExternalFormatANDROID struct. + uint64_t fExternalFormat = 0; + + VkSamplerYcbcrModelConversion fYcbcrModel = VK_SAMPLER_YCBCR_MODEL_CONVERSION_RGB_IDENTITY; + VkSamplerYcbcrRange fYcbcrRange = VK_SAMPLER_YCBCR_RANGE_ITU_FULL; + VkChromaLocation fXChromaOffset = VK_CHROMA_LOCATION_COSITED_EVEN; + VkChromaLocation fYChromaOffset = VK_CHROMA_LOCATION_COSITED_EVEN; + VkFilter fChromaFilter = VK_FILTER_NEAREST; + VkBool32 fForceExplicitReconstruction = false; + + // For external images format features here should be those returned by a call to + // vkAndroidHardwareBufferFormatPropertiesANDROID + VkFormatFeatureFlags fFormatFeatures = 0; +}; + +/* + * When wrapping a GrBackendTexture or GrBackendRendenderTarget, the fCurrentQueueFamily should + * either be VK_QUEUE_FAMILY_IGNORED, VK_QUEUE_FAMILY_EXTERNAL, or VK_QUEUE_FAMILY_FOREIGN_EXT. If + * fSharingMode is VK_SHARING_MODE_EXCLUSIVE then fCurrentQueueFamily can also be the graphics + * queue index passed into Skia. + */ +struct GrVkImageInfo { + VkImage fImage = VK_NULL_HANDLE; + skgpu::VulkanAlloc fAlloc; + VkImageTiling fImageTiling = VK_IMAGE_TILING_OPTIMAL; + VkImageLayout fImageLayout = VK_IMAGE_LAYOUT_UNDEFINED; + VkFormat fFormat = VK_FORMAT_UNDEFINED; + VkImageUsageFlags fImageUsageFlags = 0; + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + uint32_t fCurrentQueueFamily = VK_QUEUE_FAMILY_IGNORED; + skgpu::Protected fProtected = skgpu::Protected::kNo; + GrVkYcbcrConversionInfo fYcbcrConversionInfo; + VkSharingMode fSharingMode = VK_SHARING_MODE_EXCLUSIVE; +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + bool fPartOfSwapchainOrAndroidWindow = false; +#endif + +#if GR_TEST_UTILS + bool operator==(const GrVkImageInfo& that) const { + bool equal = fImage == that.fImage && fAlloc == that.fAlloc && + fImageTiling == that.fImageTiling && + fImageLayout == that.fImageLayout && + fFormat == that.fFormat && + fImageUsageFlags == that.fImageUsageFlags && + fSampleCount == that.fSampleCount && + fLevelCount == that.fLevelCount && + fCurrentQueueFamily == that.fCurrentQueueFamily && + fProtected == that.fProtected && + fYcbcrConversionInfo == that.fYcbcrConversionInfo && + fSharingMode == that.fSharingMode; +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + equal = equal && (fPartOfSwapchainOrAndroidWindow == that.fPartOfSwapchainOrAndroidWindow); +#endif + return equal; + } +#endif +}; + +using GrVkGetProc = skgpu::VulkanGetProc; + +/** + * This object is wrapped in a GrBackendDrawableInfo and passed in as an argument to + * drawBackendGpu() calls on an SkDrawable. The drawable will use this info to inject direct + * Vulkan calls into our stream of GPU draws. + * + * The SkDrawable is given a secondary VkCommandBuffer in which to record draws. The GPU backend + * will then execute that command buffer within a render pass it is using for its own draws. The + * drawable is also given the attachment of the color index, a compatible VkRenderPass, and the + * VkFormat of the color attachment so that it can make VkPipeline objects for the draws. The + * SkDrawable must not alter the state of the VkRenderpass or sub pass. + * + * Additionally, the SkDrawable may fill in the passed in fDrawBounds with the bounds of the draws + * that it submits to the command buffer. This will be used by the GPU backend for setting the + * bounds in vkCmdBeginRenderPass. If fDrawBounds is not updated, we will assume that the entire + * attachment may have been written to. + * + * The SkDrawable is always allowed to create its own command buffers and submit them to the queue + * to render offscreen textures which will be sampled in draws added to the passed in + * VkCommandBuffer. If this is done the SkDrawable is in charge of adding the required memory + * barriers to the queue for the sampled images since the Skia backend will not do this. + */ +struct GrVkDrawableInfo { + VkCommandBuffer fSecondaryCommandBuffer; + uint32_t fColorAttachmentIndex; + VkRenderPass fCompatibleRenderPass; + VkFormat fFormat; + VkRect2D* fDrawBounds; +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + bool fFromSwapchainOrAndroidWindow; +#endif +}; + +struct GrVkSurfaceInfo { + uint32_t fSampleCount = 1; + uint32_t fLevelCount = 0; + skgpu::Protected fProtected = skgpu::Protected::kNo; + + VkImageTiling fImageTiling = VK_IMAGE_TILING_OPTIMAL; + VkFormat fFormat = VK_FORMAT_UNDEFINED; + VkImageUsageFlags fImageUsageFlags = 0; + GrVkYcbcrConversionInfo fYcbcrConversionInfo; + VkSharingMode fSharingMode = VK_SHARING_MODE_EXCLUSIVE; +}; + +#endif diff --git a/gfx/skia/skia/include/gpu/vk/VulkanBackendContext.h b/gfx/skia/skia/include/gpu/vk/VulkanBackendContext.h new file mode 100644 index 0000000000..c78e2de0c9 --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/VulkanBackendContext.h @@ -0,0 +1,46 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_VulkanBackendContext_DEFINED +#define skgpu_VulkanBackendContext_DEFINED + +#include "include/gpu/GpuTypes.h" +#include "include/gpu/vk/VulkanMemoryAllocator.h" +#include "include/gpu/vk/VulkanTypes.h" + +namespace skgpu { + +class VulkanExtensions; + +// The VkBackendContext contains all of the base Vk objects needed by the skia Vulkan context. +struct SK_API VulkanBackendContext { + VkInstance fInstance; + VkPhysicalDevice fPhysicalDevice; + VkDevice fDevice; + VkQueue fQueue; + uint32_t fGraphicsQueueIndex; + // The max api version set here should match the value set in VkApplicationInfo::apiVersion when + // then VkInstance was created. + uint32_t fMaxAPIVersion; + const skgpu::VulkanExtensions* fVkExtensions = nullptr; + // The client can create their VkDevice with either a VkPhysicalDeviceFeatures or + // VkPhysicalDeviceFeatures2 struct, thus we have to support taking both. The + // VkPhysicalDeviceFeatures2 struct is needed so we know if the client enabled any extension + // specific features. If fDeviceFeatures2 is not null then we ignore fDeviceFeatures. If both + // fDeviceFeatures and fDeviceFeatures2 are null we will assume no features are enabled. + const VkPhysicalDeviceFeatures* fDeviceFeatures = nullptr; + const VkPhysicalDeviceFeatures2* fDeviceFeatures2 = nullptr; + // Optional. The client may provide an inplementation of a VulkanMemoryAllocator for Skia to use + // for allocating Vulkan resources that use VkDeviceMemory. + sk_sp fMemoryAllocator; + skgpu::VulkanGetProc fGetProc; + Protected fProtectedContext; +}; + +} // namespace skgpu::graphite + +#endif // skgpu_VulkanBackendContext_DEFINED diff --git a/gfx/skia/skia/include/gpu/vk/VulkanExtensions.h b/gfx/skia/skia/include/gpu/vk/VulkanExtensions.h new file mode 100644 index 0000000000..aea442e491 --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/VulkanExtensions.h @@ -0,0 +1,67 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_VulkanExtensions_DEFINED +#define skgpu_VulkanExtensions_DEFINED + +#include "include/core/SkString.h" +#include "include/gpu/vk/VulkanTypes.h" +#include "include/private/base/SkTArray.h" + +namespace skgpu { + +/** + * Helper class that eats in an array of extensions strings for instance and device and allows for + * quicker querying if an extension is present. + */ +class SK_API VulkanExtensions { +public: + VulkanExtensions() {} + + void init(VulkanGetProc, VkInstance, VkPhysicalDevice, + uint32_t instanceExtensionCount, const char* const* instanceExtensions, + uint32_t deviceExtensionCount, const char* const* deviceExtensions); + + bool hasExtension(const char[], uint32_t minVersion) const; + + struct Info { + Info() {} + Info(const char* name) : fName(name), fSpecVersion(0) {} + + SkString fName; + uint32_t fSpecVersion; + + struct Less { + bool operator()(const Info& a, const SkString& b) const { + return strcmp(a.fName.c_str(), b.c_str()) < 0; + } + bool operator()(const SkString& a, const VulkanExtensions::Info& b) const { + return strcmp(a.c_str(), b.fName.c_str()) < 0; + } + }; + }; + +#ifdef SK_DEBUG + void dump() const { + SkDebugf("**Vulkan Extensions**\n"); + for (int i = 0; i < fExtensions.size(); ++i) { + SkDebugf("%s. Version: %d\n", + fExtensions[i].fName.c_str(), fExtensions[i].fSpecVersion); + } + SkDebugf("**End Vulkan Extensions**\n"); + } +#endif + +private: + void getSpecVersions(VulkanGetProc getProc, VkInstance, VkPhysicalDevice); + + SkTArray fExtensions; +}; + +} // namespace skgpu + +#endif // skgpu_VulkanExtensions_DEFINED diff --git a/gfx/skia/skia/include/gpu/vk/VulkanMemoryAllocator.h b/gfx/skia/skia/include/gpu/vk/VulkanMemoryAllocator.h new file mode 100644 index 0000000000..ebaa28ed1b --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/VulkanMemoryAllocator.h @@ -0,0 +1,114 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_VulkanMemoryAllocator_DEFINED +#define skgpu_VulkanMemoryAllocator_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/vk/VulkanTypes.h" + +namespace skgpu { + +class VulkanMemoryAllocator : public SkRefCnt { +public: + enum AllocationPropertyFlags { + kNone_AllocationPropertyFlag = 0b0000, + // Allocation will be placed in its own VkDeviceMemory and not suballocated from some larger + // block. + kDedicatedAllocation_AllocationPropertyFlag = 0b0001, + // Says that the backing memory can only be accessed by the device. Additionally the device + // may lazily allocate the memory. This cannot be used with buffers that will be host + // visible. Setting this flag does not guarantee that we will allocate memory that respects + // it, but we will try to prefer memory that can respect it. + kLazyAllocation_AllocationPropertyFlag = 0b0010, + // The allocation will be mapped immediately and stay mapped until it is destroyed. This + // flag is only valid for buffers which are host visible (i.e. must have a usage other than + // BufferUsage::kGpuOnly). + kPersistentlyMapped_AllocationPropertyFlag = 0b0100, + // Allocation can only be accessed by the device using a protected context. + kProtected_AllocationPropertyFlag = 0b1000, + }; + + enum class BufferUsage { + // Buffers that will only be accessed from the device (large const buffers) will always be + // in device local memory. + kGpuOnly, + // Buffers that typically will be updated multiple times by the host and read on the gpu + // (e.g. uniform or vertex buffers). CPU writes will generally be sequential in the buffer + // and will try to take advantage of the write-combined nature of the gpu buffers. Thus this + // will always be mappable and coherent memory, and it will prefer to be in device local + // memory. + kCpuWritesGpuReads, + // Buffers that will be accessed on the host and copied to another GPU resource (transfer + // buffers). Will always be mappable and coherent memory. + kTransfersFromCpuToGpu, + // Buffers which are typically writted to by the GPU and then read on the host. Will always + // be mappable memory, and will prefer cached memory. + kTransfersFromGpuToCpu, + }; + + virtual VkResult allocateImageMemory(VkImage image, + uint32_t allocationPropertyFlags, + skgpu::VulkanBackendMemory* memory) = 0; + + virtual VkResult allocateBufferMemory(VkBuffer buffer, + BufferUsage usage, + uint32_t allocationPropertyFlags, + skgpu::VulkanBackendMemory* memory) = 0; + + // Fills out the passed in skgpu::VulkanAlloc struct for the passed in + // skgpu::VulkanBackendMemory. + virtual void getAllocInfo(const skgpu::VulkanBackendMemory&, skgpu::VulkanAlloc*) const = 0; + + // Maps the entire allocation and returns a pointer to the start of the allocation. The + // implementation may map more memory than just the allocation, but the returned pointer must + // point at the start of the memory for the requested allocation. + virtual void* mapMemory(const skgpu::VulkanBackendMemory&) { return nullptr; } + virtual VkResult mapMemory(const skgpu::VulkanBackendMemory& memory, void** data) { + *data = this->mapMemory(memory); + // VK_ERROR_INITIALIZATION_FAILED is a bogus result to return from this function, but it is + // just something to return that is not VK_SUCCESS and can't be interpreted by a caller to + // mean something specific happened like device lost or oom. This will be removed once we + // update clients to implement this virtual. + return *data ? VK_SUCCESS : VK_ERROR_INITIALIZATION_FAILED; + } + virtual void unmapMemory(const skgpu::VulkanBackendMemory&) = 0; + + // The following two calls are used for managing non-coherent memory. The offset is relative to + // the start of the allocation and not the underlying VkDeviceMemory. Additionaly the client + // must make sure that the offset + size passed in is less that or equal to the allocation size. + // It is the responsibility of the implementation to make sure all alignment requirements are + // followed. The client should not have to deal with any sort of alignment issues. + virtual void flushMappedMemory(const skgpu::VulkanBackendMemory&, VkDeviceSize, VkDeviceSize) {} + virtual VkResult flushMemory(const skgpu::VulkanBackendMemory& memory, + VkDeviceSize offset, + VkDeviceSize size) { + this->flushMappedMemory(memory, offset, size); + return VK_SUCCESS; + } + virtual void invalidateMappedMemory(const skgpu::VulkanBackendMemory&, + VkDeviceSize, + VkDeviceSize) {} + virtual VkResult invalidateMemory(const skgpu::VulkanBackendMemory& memory, + VkDeviceSize offset, + VkDeviceSize size) { + this->invalidateMappedMemory(memory, offset, size); + return VK_SUCCESS; + } + + virtual void freeMemory(const skgpu::VulkanBackendMemory&) = 0; + + // Returns the total amount of memory that is allocated as well as total + // amount of memory in use by an allocation from this allocator. + // Return 1st param is total allocated memory, 2nd is total used memory. + virtual std::pair totalAllocatedAndUsedMemory() const = 0; +}; + +} // namespace skgpu + +#endif // skgpu_VulkanMemoryAllocator_DEFINED diff --git a/gfx/skia/skia/include/gpu/vk/VulkanTypes.h b/gfx/skia/skia/include/gpu/vk/VulkanTypes.h new file mode 100644 index 0000000000..5468c59211 --- /dev/null +++ b/gfx/skia/skia/include/gpu/vk/VulkanTypes.h @@ -0,0 +1,59 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_VulkanTypes_DEFINED +#define skgpu_VulkanTypes_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/gpu/vk/SkiaVulkan.h" + +#include + +#ifndef VK_VERSION_1_1 +#error Skia requires the use of Vulkan 1.1 headers +#endif + +namespace skgpu { + +using VulkanGetProc = std::function; + +typedef intptr_t VulkanBackendMemory; + +/** + * Types for interacting with Vulkan resources created externally to Skia. + */ +struct VulkanAlloc { + // can be VK_NULL_HANDLE iff is an RT and is borrowed + VkDeviceMemory fMemory = VK_NULL_HANDLE; + VkDeviceSize fOffset = 0; + VkDeviceSize fSize = 0; // this can be indeterminate iff Tex uses borrow semantics + uint32_t fFlags = 0; + // handle to memory allocated via skgpu::VulkanMemoryAllocator. + VulkanBackendMemory fBackendMemory = 0; + + enum Flag { + kNoncoherent_Flag = 0x1, // memory must be flushed to device after mapping + kMappable_Flag = 0x2, // memory is able to be mapped. + kLazilyAllocated_Flag = 0x4, // memory was created with lazy allocation + }; + + bool operator==(const VulkanAlloc& that) const { + return fMemory == that.fMemory && fOffset == that.fOffset && fSize == that.fSize && + fFlags == that.fFlags && fUsesSystemHeap == that.fUsesSystemHeap; + } + +private: + bool fUsesSystemHeap = false; +}; + +} // namespace skgpu + +#endif // skgpu_VulkanTypes_DEFINED diff --git a/gfx/skia/skia/include/pathops/SkPathOps.h b/gfx/skia/skia/include/pathops/SkPathOps.h new file mode 100644 index 0000000000..2d1a911be1 --- /dev/null +++ b/gfx/skia/skia/include/pathops/SkPathOps.h @@ -0,0 +1,113 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOps_DEFINED +#define SkPathOps_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" + +struct SkRect; + + +// FIXME: move everything below into the SkPath class +/** + * The logical operations that can be performed when combining two paths. + */ +enum SkPathOp { + kDifference_SkPathOp, //!< subtract the op path from the first path + kIntersect_SkPathOp, //!< intersect the two paths + kUnion_SkPathOp, //!< union (inclusive-or) the two paths + kXOR_SkPathOp, //!< exclusive-or the two paths + kReverseDifference_SkPathOp, //!< subtract the first path from the op path +}; + +/** Set this path to the result of applying the Op to this path and the + specified path: this = (this op operand). + The resulting path will be constructed from non-overlapping contours. + The curve order is reduced where possible so that cubics may be turned + into quadratics, and quadratics maybe turned into lines. + + Returns true if operation was able to produce a result; + otherwise, result is unmodified. + + @param one The first operand (for difference, the minuend) + @param two The second operand (for difference, the subtrahend) + @param op The operator to apply. + @param result The product of the operands. The result may be one of the + inputs. + @return True if the operation succeeded. + */ +bool SK_API Op(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result); + +/** Set this path to a set of non-overlapping contours that describe the + same area as the original path. + The curve order is reduced where possible so that cubics may + be turned into quadratics, and quadratics maybe turned into lines. + + Returns true if operation was able to produce a result; + otherwise, result is unmodified. + + @param path The path to simplify. + @param result The simplified path. The result may be the input. + @return True if simplification succeeded. + */ +bool SK_API Simplify(const SkPath& path, SkPath* result); + +/** Set the resulting rectangle to the tight bounds of the path. + + @param path The path measured. + @param result The tight bounds of the path. + @return True if the bounds could be computed. + */ +bool SK_API TightBounds(const SkPath& path, SkRect* result); + +/** Set the result with fill type winding to area equivalent to path. + Returns true if successful. Does not detect if path contains contours which + contain self-crossings or cross other contours; in these cases, may return + true even though result does not fill same area as path. + + Returns true if operation was able to produce a result; + otherwise, result is unmodified. The result may be the input. + + @param path The path typically with fill type set to even odd. + @param result The equivalent path with fill type set to winding. + @return True if winding path was set. + */ +bool SK_API AsWinding(const SkPath& path, SkPath* result); + +/** Perform a series of path operations, optimized for unioning many paths together. + */ +class SK_API SkOpBuilder { +public: + /** Add one or more paths and their operand. The builder is empty before the first + path is added, so the result of a single add is (emptyPath OP path). + + @param path The second operand. + @param _operator The operator to apply to the existing and supplied paths. + */ + void add(const SkPath& path, SkPathOp _operator); + + /** Computes the sum of all paths and operands, and resets the builder to its + initial state. + + @param result The product of the operands. + @return True if the operation succeeded. + */ + bool resolve(SkPath* result); + +private: + SkTArray fPathRefs; + SkTDArray fOps; + + static bool FixWinding(SkPath* path); + static void ReversePath(SkPath* path); + void reset(); +}; + +#endif diff --git a/gfx/skia/skia/include/ports/SkCFObject.h b/gfx/skia/skia/include/ports/SkCFObject.h new file mode 100644 index 0000000000..20e86671b7 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkCFObject.h @@ -0,0 +1,180 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCFObject_DEFINED +#define SkCFObject_DEFINED + +#ifdef __APPLE__ + +#include "include/core/SkTypes.h" + +#include // std::nullptr_t + +#import + +/** + * Wrapper class for managing lifetime of CoreFoundation objects. It will call + * CFRetain and CFRelease appropriately on creation, assignment, and deletion. + * Based on sk_sp<>. + */ +template static inline T SkCFSafeRetain(T obj) { + if (obj) { + CFRetain(obj); + } + return obj; +} + +template static inline void SkCFSafeRelease(T obj) { + if (obj) { + CFRelease(obj); + } +} + +template class sk_cfp { +public: + using element_type = T; + + constexpr sk_cfp() {} + constexpr sk_cfp(std::nullptr_t) {} + + /** + * Shares the underlying object by calling CFRetain(), so that both the argument and the newly + * created sk_cfp both have a reference to it. + */ + sk_cfp(const sk_cfp& that) : fObject(SkCFSafeRetain(that.get())) {} + + /** + * Move the underlying object from the argument to the newly created sk_cfp. Afterwards only + * the new sk_cfp will have a reference to the object, and the argument will point to null. + * No call to CFRetain() or CFRelease() will be made. + */ + sk_cfp(sk_cfp&& that) : fObject(that.release()) {} + + /** + * Adopt the bare object into the newly created sk_cfp. + * No call to CFRetain() or CFRelease() will be made. + */ + explicit sk_cfp(T obj) { + fObject = obj; + } + + /** + * Calls CFRelease() on the underlying object pointer. + */ + ~sk_cfp() { + SkCFSafeRelease(fObject); + SkDEBUGCODE(fObject = nil); + } + + sk_cfp& operator=(std::nullptr_t) { this->reset(); return *this; } + + /** + * Shares the underlying object referenced by the argument by calling CFRetain() on it. If this + * sk_cfp previously had a reference to an object (i.e. not null) it will call CFRelease() + * on that object. + */ + sk_cfp& operator=(const sk_cfp& that) { + if (this != &that) { + this->reset(SkCFSafeRetain(that.get())); + } + return *this; + } + + /** + * Move the underlying object from the argument to the sk_cfp. If the sk_cfp + * previously held a reference to another object, CFRelease() will be called on that object. + * No call to CFRetain() will be made. + */ + sk_cfp& operator=(sk_cfp&& that) { + this->reset(that.release()); + return *this; + } + + explicit operator bool() const { return this->get() != nil; } + + T get() const { return fObject; } + T operator*() const { + SkASSERT(fObject); + return fObject; + } + + /** + * Adopt the new object, and call CFRelease() on any previously held object (if not null). + * No call to CFRetain() will be made. + */ + void reset(T object = nil) { + // Need to unref after assigning, see + // http://wg21.cmeerw.net/lwg/issue998 + // http://wg21.cmeerw.net/lwg/issue2262 + T oldObject = fObject; + fObject = object; + SkCFSafeRelease(oldObject); + } + + /** + * Shares the new object by calling CFRetain() on it. If this sk_cfp previously had a + * reference to an object (i.e. not null) it will call CFRelease() on that object. + */ + void retain(T object) { + if (fObject != object) { + this->reset(SkCFSafeRetain(object)); + } + } + + /** + * Return the original object, and set the internal object to nullptr. + * The caller must assume ownership of the object, and manage its reference count directly. + * No call to CFRelease() will be made. + */ + T SK_WARN_UNUSED_RESULT release() { + T obj = fObject; + fObject = nil; + return obj; + } + +private: + T fObject = nil; +}; + +template inline bool operator==(const sk_cfp& a, + const sk_cfp& b) { + return a.get() == b.get(); +} +template inline bool operator==(const sk_cfp& a, + std::nullptr_t) { + return !a; +} +template inline bool operator==(std::nullptr_t, + const sk_cfp& b) { + return !b; +} + +template inline bool operator!=(const sk_cfp& a, + const sk_cfp& b) { + return a.get() != b.get(); +} +template inline bool operator!=(const sk_cfp& a, + std::nullptr_t) { + return static_cast(a); +} +template inline bool operator!=(std::nullptr_t, + const sk_cfp& b) { + return static_cast(b); +} + +/* + * Returns a sk_cfp wrapping the provided object AND calls retain on it (if not null). + * + * This is different than the semantics of the constructor for sk_cfp, which just wraps the + * object, effectively "adopting" it. + */ +template sk_cfp sk_ret_cfp(T obj) { + return sk_cfp(SkCFSafeRetain(obj)); +} + +#endif // __APPLE__ +#endif // SkCFObject_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontConfigInterface.h b/gfx/skia/skia/include/ports/SkFontConfigInterface.h new file mode 100644 index 0000000000..65fd612593 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontConfigInterface.h @@ -0,0 +1,115 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontConfigInterface_DEFINED +#define SkFontConfigInterface_DEFINED + +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypeface.h" + +class SkFontMgr; + +/** + * \class SkFontConfigInterface + * + * A simple interface for remotable font management. + * The global instance can be found with RefGlobal(). + */ +class SK_API SkFontConfigInterface : public SkRefCnt { +public: + + /** + * Returns the global SkFontConfigInterface instance. If it is not + * nullptr, calls ref() on it. The caller must balance this with a call to + * unref(). The default SkFontConfigInterface is the result of calling + * GetSingletonDirectInterface. + */ + static sk_sp RefGlobal(); + + /** + * Replace the current global instance with the specified one. + */ + static void SetGlobal(sk_sp fc); + + /** + * This should be treated as private to the impl of SkFontConfigInterface. + * Callers should not change or expect any particular values. It is meant + * to be a union of possible storage types to aid the impl. + */ + struct FontIdentity { + FontIdentity() : fID(0), fTTCIndex(0) {} + + bool operator==(const FontIdentity& other) const { + return fID == other.fID && + fTTCIndex == other.fTTCIndex && + fString == other.fString; + } + bool operator!=(const FontIdentity& other) const { + return !(*this == other); + } + + uint32_t fID; + int32_t fTTCIndex; + SkString fString; + SkFontStyle fStyle; + + // If buffer is NULL, just return the number of bytes that would have + // been written. Will pad contents to a multiple of 4. + size_t writeToMemory(void* buffer = nullptr) const; + + // Recreate from a flattened buffer, returning the number of bytes read. + size_t readFromMemory(const void* buffer, size_t length); + }; + + /** + * Given a familyName and style, find the best match. + * + * If a match is found, return true and set its outFontIdentifier. + * If outFamilyName is not null, assign the found familyName to it + * (which may differ from the requested familyName). + * If outStyle is not null, assign the found style to it + * (which may differ from the requested style). + * + * If a match is not found, return false, and ignore all out parameters. + */ + virtual bool matchFamilyName(const char familyName[], + SkFontStyle requested, + FontIdentity* outFontIdentifier, + SkString* outFamilyName, + SkFontStyle* outStyle) = 0; + + /** + * Given a FontRef, open a stream to access its data, or return null + * if the FontRef's data is not available. The caller is responsible for + * deleting the stream when it is done accessing the data. + */ + virtual SkStreamAsset* openStream(const FontIdentity&) = 0; + + /** + * Return an SkTypeface for the given FontIdentity. + * + * The default implementation simply returns a new typeface built using data obtained from + * openStream(), but derived classes may implement more complex caching schemes. + */ + virtual sk_sp makeTypeface(const FontIdentity& identity) { + return SkTypeface::MakeFromStream(std::unique_ptr(this->openStream(identity)), + identity.fTTCIndex); + + } + + /** + * Return a singleton instance of a direct subclass that calls into + * libfontconfig. This does not affect the refcnt of the returned instance. + */ + static SkFontConfigInterface* GetSingletonDirectInterface(); + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/ports/SkFontMgr_FontConfigInterface.h b/gfx/skia/skia/include/ports/SkFontMgr_FontConfigInterface.h new file mode 100644 index 0000000000..05771257d2 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_FontConfigInterface.h @@ -0,0 +1,20 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_FontConfigInterface_DEFINED +#define SkFontMgr_FontConfigInterface_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkFontMgr; +class SkFontConfigInterface; + +/** Creates a SkFontMgr which wraps a SkFontConfigInterface. */ +SK_API sk_sp SkFontMgr_New_FCI(sk_sp fci); + +#endif // #ifndef SkFontMgr_FontConfigInterface_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontMgr_android.h b/gfx/skia/skia/include/ports/SkFontMgr_android.h new file mode 100644 index 0000000000..d68f3ba034 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_android.h @@ -0,0 +1,45 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_android_DEFINED +#define SkFontMgr_android_DEFINED + +#include "include/core/SkRefCnt.h" + +class SkFontMgr; + +struct SkFontMgr_Android_CustomFonts { + /** When specifying custom fonts, indicates how to use system fonts. */ + enum SystemFontUse { + kOnlyCustom, /** Use only custom fonts. NDK compliant. */ + kPreferCustom, /** Use custom fonts before system fonts. */ + kPreferSystem /** Use system fonts before custom fonts. */ + }; + /** Whether or not to use system fonts. */ + SystemFontUse fSystemFontUse; + + /** Base path to resolve relative font file names. If a directory, should end with '/'. */ + const char* fBasePath; + + /** Optional custom configuration file to use. */ + const char* fFontsXml; + + /** Optional custom configuration file for fonts which provide fallback. + * In the new style (version > 21) fontsXml format is used, this should be NULL. + */ + const char* fFallbackFontsXml; + + /** Optional custom flag. If set to true the SkFontMgr will acquire all requisite + * system IO resources on initialization. + */ + bool fIsolated; +}; + +/** Create a font manager for Android. If 'custom' is NULL, use only system fonts. */ +SK_API sk_sp SkFontMgr_New_Android(const SkFontMgr_Android_CustomFonts* custom); + +#endif // SkFontMgr_android_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontMgr_data.h b/gfx/skia/skia/include/ports/SkFontMgr_data.h new file mode 100644 index 0000000000..6a22365af4 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_data.h @@ -0,0 +1,22 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkFontMgr_data_DEFINED +#define SkFontMgr_data_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" + +class SkFontMgr; + +/** Create a custom font manager which wraps a collection of SkData-stored fonts. + * This font manager uses FreeType for rendering. + */ +SK_API sk_sp SkFontMgr_New_Custom_Data(SkSpan>); + +#endif // SkFontMgr_data_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontMgr_directory.h b/gfx/skia/skia/include/ports/SkFontMgr_directory.h new file mode 100644 index 0000000000..b1a60fb4da --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_directory.h @@ -0,0 +1,21 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_directory_DEFINED +#define SkFontMgr_directory_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkFontMgr; + +/** Create a custom font manager which scans a given directory for font files. + * This font manager uses FreeType for rendering. + */ +SK_API sk_sp SkFontMgr_New_Custom_Directory(const char* dir); + +#endif // SkFontMgr_directory_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontMgr_empty.h b/gfx/skia/skia/include/ports/SkFontMgr_empty.h new file mode 100644 index 0000000000..e5756421d0 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_empty.h @@ -0,0 +1,21 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_empty_DEFINED +#define SkFontMgr_empty_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkFontMgr; + +/** Create a custom font manager that contains no built-in fonts. + * This font manager uses FreeType for rendering. + */ +SK_API sk_sp SkFontMgr_New_Custom_Empty(); + +#endif // SkFontMgr_empty_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontMgr_fontconfig.h b/gfx/skia/skia/include/ports/SkFontMgr_fontconfig.h new file mode 100644 index 0000000000..4b2bb2d297 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_fontconfig.h @@ -0,0 +1,22 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_fontconfig_DEFINED +#define SkFontMgr_fontconfig_DEFINED + +#include "include/core/SkRefCnt.h" +#include + +class SkFontMgr; + +/** Create a font manager around a FontConfig instance. + * If 'fc' is NULL, will use a new default config. + * Takes ownership of 'fc' and will call FcConfigDestroy on it. + */ +SK_API sk_sp SkFontMgr_New_FontConfig(FcConfig* fc); + +#endif // #ifndef SkFontMgr_fontconfig_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontMgr_fuchsia.h b/gfx/skia/skia/include/ports/SkFontMgr_fuchsia.h new file mode 100644 index 0000000000..d20530af72 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_fuchsia.h @@ -0,0 +1,19 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_fuchsia_DEFINED +#define SkFontMgr_fuchsia_DEFINED + +#include + +#include "include/core/SkRefCnt.h" + +class SkFontMgr; + +SK_API sk_sp SkFontMgr_New_Fuchsia(fuchsia::fonts::ProviderSyncPtr provider); + +#endif // SkFontMgr_fuchsia_DEFINED diff --git a/gfx/skia/skia/include/ports/SkFontMgr_indirect.h b/gfx/skia/skia/include/ports/SkFontMgr_indirect.h new file mode 100644 index 0000000000..2a499ab676 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_indirect.h @@ -0,0 +1,102 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_indirect_DEFINED +#define SkFontMgr_indirect_DEFINED + +#include "include/core/SkFontMgr.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" +#include "include/ports/SkRemotableFontMgr.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTArray.h" + +class SkData; +class SkFontStyle; +class SkStreamAsset; +class SkString; + +class SK_API SkFontMgr_Indirect : public SkFontMgr { +public: + // TODO: The SkFontMgr is only used for createFromStream/File/Data. + // In the future these calls should be broken out into their own interface + // with a name like SkFontRenderer. + SkFontMgr_Indirect(sk_sp impl, sk_sp proxy) + : fImpl(std::move(impl)), fProxy(std::move(proxy)) + { } + +protected: + int onCountFamilies() const override; + void onGetFamilyName(int index, SkString* familyName) const override; + SkFontStyleSet* onCreateStyleSet(int index) const override; + + SkFontStyleSet* onMatchFamily(const char familyName[]) const override; + + SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle& fontStyle) const override; + + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle&, + const char* bcp47[], + int bcp47Count, + SkUnichar character) const override; + + sk_sp onMakeFromStreamIndex(std::unique_ptr, int ttcIndex) const override; + sk_sp onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const override; + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override; + sk_sp onMakeFromData(sk_sp, int ttcIndex) const override; + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle) const override; + +private: + SkTypeface* createTypefaceFromFontId(const SkFontIdentity& fontId) const; + + sk_sp fImpl; + sk_sp fProxy; + + struct DataEntry { + uint32_t fDataId; // key1 + uint32_t fTtcIndex; // key2 + SkTypeface* fTypeface; // value: weak ref to typeface + + DataEntry() = default; + + DataEntry(DataEntry&& that) { *this = std::move(that); } + DataEntry& operator=(DataEntry&& that) { + if (this != &that) { + fDataId = that.fDataId; + fTtcIndex = that.fTtcIndex; + fTypeface = that.fTypeface; + + SkDEBUGCODE(that.fDataId = SkFontIdentity::kInvalidDataId;) + SkDEBUGCODE(that.fTtcIndex = 0xbbadbeef;) + that.fTypeface = nullptr; + } + return *this; + } + + ~DataEntry() { + if (fTypeface) { + fTypeface->weak_unref(); + } + } + }; + /** + * This cache is essentially { dataId: { ttcIndex: typeface } } + * For data caching we want a mapping from data id to weak references to + * typefaces with that data id. By storing the index next to the typeface, + * this data cache also acts as a typeface cache. + */ + mutable SkTArray fDataCache; + mutable SkMutex fDataCacheMutex; + + friend class SkStyleSet_Indirect; +}; + +#endif diff --git a/gfx/skia/skia/include/ports/SkFontMgr_mac_ct.h b/gfx/skia/skia/include/ports/SkFontMgr_mac_ct.h new file mode 100644 index 0000000000..45cba65b5d --- /dev/null +++ b/gfx/skia/skia/include/ports/SkFontMgr_mac_ct.h @@ -0,0 +1,27 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_mac_ct_DEFINED +#define SkFontMgr_mac_ct_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +#ifdef SK_BUILD_FOR_MAC +#import +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#endif + +class SkFontMgr; + +/** Create a font manager for CoreText. If the collection is nullptr the system default will be used. */ +SK_API extern sk_sp SkFontMgr_New_CoreText(CTFontCollectionRef); + +#endif // SkFontMgr_mac_ct_DEFINED diff --git a/gfx/skia/skia/include/ports/SkImageGeneratorCG.h b/gfx/skia/skia/include/ports/SkImageGeneratorCG.h new file mode 100644 index 0000000000..93592cde4e --- /dev/null +++ b/gfx/skia/skia/include/ports/SkImageGeneratorCG.h @@ -0,0 +1,20 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#include "include/core/SkData.h" +#include "include/core/SkImageGenerator.h" + +#include + +namespace SkImageGeneratorCG { +SK_API std::unique_ptr MakeFromEncodedCG(sk_sp); +} // namespace SkImageGeneratorCG + +#endif //defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) diff --git a/gfx/skia/skia/include/ports/SkImageGeneratorNDK.h b/gfx/skia/skia/include/ports/SkImageGeneratorNDK.h new file mode 100644 index 0000000000..739a586f0d --- /dev/null +++ b/gfx/skia/skia/include/ports/SkImageGeneratorNDK.h @@ -0,0 +1,40 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageGeneratorNDK_DEFINED +#define SkImageGeneratorNDK_DEFINED + +#include "include/core/SkTypes.h" +#ifdef SK_ENABLE_NDK_IMAGES + +#include "include/core/SkData.h" +#include "include/core/SkImageGenerator.h" + +#include + +namespace SkImageGeneratorNDK { +/** + * Create a generator that uses the Android NDK's APIs for decoding images. + * + * Only supported on devices where __ANDROID_API__ >= 30. + * + * As with SkCodec, the SkColorSpace passed to getPixels() determines the + * type of color space transformations to apply. A null SkColorSpace means to + * apply none. + * + * A note on scaling: Calling getPixels() on the resulting SkImageGenerator + * with dimensions that do not match getInfo() requests a scale. For WebP + * files, dimensions smaller than those of getInfo are supported. For Jpeg + * files, dimensions of 1/2, 1/4, and 1/8 are supported. TODO: Provide an + * API like SkCodecImageGenerator::getScaledDimensions() to report which + * dimensions are supported? + */ +SK_API std::unique_ptr MakeFromEncodedNDK(sk_sp); +} + +#endif // SK_ENABLE_NDK_IMAGES +#endif // SkImageGeneratorNDK_DEFINED diff --git a/gfx/skia/skia/include/ports/SkImageGeneratorWIC.h b/gfx/skia/skia/include/ports/SkImageGeneratorWIC.h new file mode 100644 index 0000000000..eb57a20956 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkImageGeneratorWIC.h @@ -0,0 +1,35 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#if defined(SK_BUILD_FOR_WIN) + +#include "include/core/SkData.h" +#include "include/core/SkImageGenerator.h" + +#include + +/* + * Any Windows program that uses COM must initialize the COM library by calling + * the CoInitializeEx function. In addition, each thread that uses a COM + * interface must make a separate call to this function. + * + * For every successful call to CoInitializeEx, the thread must call + * CoUninitialize before it exits. + * + * SkImageGeneratorWIC requires the COM library and leaves it to the client to + * initialize COM for their application. + * + * For more information on initializing COM, please see: + * https://msdn.microsoft.com/en-us/library/windows/desktop/ff485844.aspx + */ +namespace SkImageGeneratorWIC { +SK_API std::unique_ptr MakeFromEncodedWIC(sk_sp); +} + +#endif // SK_BUILD_FOR_WIN diff --git a/gfx/skia/skia/include/ports/SkRemotableFontMgr.h b/gfx/skia/skia/include/ports/SkRemotableFontMgr.h new file mode 100644 index 0000000000..eacb6bde9c --- /dev/null +++ b/gfx/skia/skia/include/ports/SkRemotableFontMgr.h @@ -0,0 +1,139 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRemotableFontMgr_DEFINED +#define SkRemotableFontMgr_DEFINED + +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTemplates.h" + +class SkDataTable; +class SkStreamAsset; + +struct SK_API SkFontIdentity { + static const uint32_t kInvalidDataId = 0xFFFFFFFF; + + // Note that fDataId is a data identifier, not a font identifier. + // (fDataID, fTtcIndex) can be seen as a font identifier. + uint32_t fDataId; + uint32_t fTtcIndex; + + // On Linux/FontConfig there is also the ability to specify preferences for rendering + // antialias, embedded bitmaps, autohint, hinting, hintstyle, lcd rendering + // may all be set or set to no-preference + // (No-preference is resolved against globals set by the platform) + // Since they may be selected against, these are really 'extensions' to SkFontStyle. + // SkFontStyle should pick these up. + SkFontStyle fFontStyle; +}; + +class SK_API SkRemotableFontIdentitySet : public SkRefCnt { +public: + SkRemotableFontIdentitySet(int count, SkFontIdentity** data); + + int count() const { return fCount; } + const SkFontIdentity& at(int index) const { return fData[index]; } + + static SkRemotableFontIdentitySet* NewEmpty(); + +private: + SkRemotableFontIdentitySet() : fCount(0), fData() { } + + friend SkRemotableFontIdentitySet* sk_remotable_font_identity_set_new(); + + int fCount; + skia_private::AutoTArray fData; + + using INHERITED = SkRefCnt; +}; + +class SK_API SkRemotableFontMgr : public SkRefCnt { +public: + /** + * Returns all of the fonts with the given familyIndex. + * Returns NULL if the index is out of bounds. + * Returns empty if there are no fonts at the given index. + * + * The caller must unref() the returned object. + */ + virtual SkRemotableFontIdentitySet* getIndex(int familyIndex) const = 0; + + /** + * Returns the closest match to the given style in the given index. + * If there are no available fonts at the given index, the return value's + * data id will be kInvalidDataId. + */ + virtual SkFontIdentity matchIndexStyle(int familyIndex, const SkFontStyle&) const = 0; + + /** + * Returns all the fonts on the system with the given name. + * If the given name is NULL, will return the default font family. + * Never returns NULL; will return an empty set if the name is not found. + * + * It is possible that this will return fonts not accessible from + * getIndex(int) or matchIndexStyle(int, SkFontStyle) due to + * hidden or auto-activated fonts. + * + * The matching may be done in a system dependent way. The name may be + * matched case-insensitive, there may be system aliases which resolve, + * and names outside the current locale may be considered. However, this + * should only return fonts which are somehow associated with the requested + * name. + * + * The caller must unref() the returned object. + */ + virtual SkRemotableFontIdentitySet* matchName(const char familyName[]) const = 0; + + /** + * Returns the closest matching font to the specified name and style. + * If there are no available fonts which match the name, the return value's + * data id will be kInvalidDataId. + * If the given name is NULL, the match will be against any default fonts. + * + * It is possible that this will return a font identity not accessible from + * methods returning sets due to hidden or auto-activated fonts. + * + * The matching may be done in a system dependent way. The name may be + * matched case-insensitive, there may be system aliases which resolve, + * and names outside the current locale may be considered. However, this + * should only return a font which is somehow associated with the requested + * name. + * + * The caller must unref() the returned object. + */ + virtual SkFontIdentity matchNameStyle(const char familyName[], const SkFontStyle&) const = 0; + + /** + * Use the system fall-back to find a font for the given character. + * If no font can be found for the character, the return value's data id + * will be kInvalidDataId. + * If the name is NULL, the match will start against any default fonts. + * If the bpc47 is NULL, a default locale will be assumed. + * + * Note that bpc47 is a combination of ISO 639, 15924, and 3166-1 codes, + * so it is fine to just pass a ISO 639 here. + */ + virtual SkFontIdentity matchNameStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const=0; + + /** + * Returns the data for the given data id. + * Will return NULL if the data id is invalid. + * Note that this is a data id, not a font id. + * + * The caller must unref() the returned object. + */ + virtual SkStreamAsset* getData(int dataId) const = 0; + +private: + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/ports/SkTypeface_cairo.h b/gfx/skia/skia/include/ports/SkTypeface_cairo.h new file mode 100644 index 0000000000..7cf1aec3b1 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkTypeface_cairo.h @@ -0,0 +1,17 @@ +#ifndef SkTypeface_cairo_DEFINED +#define SkTypeface_cairo_DEFINED + +#include "include/core/SkTypeface.h" +#include "include/core/SkSurfaceProps.h" + +struct FT_FaceRec_; +typedef FT_FaceRec_* FT_Face; + +SK_API extern void SkInitCairoFT(bool fontHintingEnabled); + +SK_API extern SkTypeface* SkCreateTypefaceFromCairoFTFont( + FT_Face face = nullptr, void* faceContext = nullptr, + SkPixelGeometry pixelGeometry = kUnknown_SkPixelGeometry, + uint8_t lcdFilter = 0); + +#endif diff --git a/gfx/skia/skia/include/ports/SkTypeface_mac.h b/gfx/skia/skia/include/ports/SkTypeface_mac.h new file mode 100644 index 0000000000..ec68e05492 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkTypeface_mac.h @@ -0,0 +1,44 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTypeface_mac_DEFINED +#define SkTypeface_mac_DEFINED + +#include "include/core/SkTypeface.h" + +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#include + +#ifdef SK_BUILD_FOR_MAC +#import +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#endif + +/** + * Like the other Typeface make methods, this returns a new reference to the + * corresponding typeface for the specified CTFontRef. + */ +SK_API extern sk_sp SkMakeTypefaceFromCTFont(CTFontRef); + +/** + * Returns the platform-specific CTFontRef handle for a + * given SkTypeface. Note that the returned CTFontRef gets + * released when the source SkTypeface is destroyed. + * + * This method is deprecated. It may only be used by Blink Mac + * legacy code in special cases related to text-shaping + * with AAT fonts, clipboard handling and font fallback. + * See https://code.google.com/p/skia/issues/detail?id=3408 + */ +SK_API extern CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face); + +#endif // defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) +#endif // SkTypeface_mac_DEFINED diff --git a/gfx/skia/skia/include/ports/SkTypeface_win.h b/gfx/skia/skia/include/ports/SkTypeface_win.h new file mode 100644 index 0000000000..22a930e319 --- /dev/null +++ b/gfx/skia/skia/include/ports/SkTypeface_win.h @@ -0,0 +1,93 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTypeface_win_DEFINED +#define SkTypeface_win_DEFINED + +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" + +#ifdef SK_BUILD_FOR_WIN + +#ifdef UNICODE +typedef struct tagLOGFONTW LOGFONTW; +typedef LOGFONTW LOGFONT; +#else +typedef struct tagLOGFONTA LOGFONTA; +typedef LOGFONTA LOGFONT; +#endif // UNICODE + +/** + * Like the other Typeface create methods, this returns a new reference to the + * corresponding typeface for the specified logfont. The caller is responsible + * for calling unref() when it is finished. + */ +SK_API SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT&); + +/** + * Copy the LOGFONT associated with this typeface into the lf parameter. Note + * that the lfHeight will need to be set afterwards, since the typeface does + * not track this (the paint does). + * typeface may be NULL, in which case we return the logfont for the default font. + */ +SK_API void SkLOGFONTFromTypeface(const SkTypeface* typeface, LOGFONT* lf); + +/** + * Set an optional callback to ensure that the data behind a LOGFONT is loaded. + * This will get called if Skia tries to access the data but hits a failure. + * Normally this is null, and is only required if the font data needs to be + * remotely (re)loaded. + */ +SK_API void SkTypeface_SetEnsureLOGFONTAccessibleProc(void (*)(const LOGFONT&)); + +// Experimental! +// +class SkFontMgr; +class SkRemotableFontMgr; +struct IDWriteFactory; +struct IDWriteFontCollection; +struct IDWriteFontFallback; +struct IDWriteFontFace; + +/** + * Like the other Typeface create methods, this returns a new reference to the + * corresponding typeface for the specified dwrite font. The caller is responsible + * for calling unref() when it is finished. + */ +SK_API SkTypeface* SkCreateTypefaceFromDWriteFont(IDWriteFactory* aFactory, + IDWriteFontFace* aFontFace, + SkFontStyle aStyle, + int aRenderingMode, + float aGamma, + float aContrast, + float aClearTypeLevel); + +SK_API sk_sp SkFontMgr_New_GDI(); +SK_API sk_sp SkFontMgr_New_DirectWrite(IDWriteFactory* factory = nullptr, + IDWriteFontCollection* collection = nullptr); +SK_API sk_sp SkFontMgr_New_DirectWrite(IDWriteFactory* factory, + IDWriteFontCollection* collection, + IDWriteFontFallback* fallback); + +/** + * Creates an SkFontMgr which renders using DirectWrite and obtains its data + * from the SkRemotableFontMgr. + * + * If DirectWrite could not be initialized, will return NULL. + */ +SK_API sk_sp SkFontMgr_New_DirectWriteRenderer(sk_sp); + +/** + * Creates an SkRemotableFontMgr backed by DirectWrite using the default + * system font collection in the current locale. + * + * If DirectWrite could not be initialized, will return NULL. + */ +SK_API sk_sp SkRemotableFontMgr_New_DirectWrite(); + +#endif // SK_BUILD_FOR_WIN +#endif // SkTypeface_win_DEFINED diff --git a/gfx/skia/skia/include/private/SkBitmaskEnum.h b/gfx/skia/skia/include/private/SkBitmaskEnum.h new file mode 100644 index 0000000000..b25045359d --- /dev/null +++ b/gfx/skia/skia/include/private/SkBitmaskEnum.h @@ -0,0 +1,59 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkEnumOperators_DEFINED +#define SkEnumOperators_DEFINED + +#include + +namespace sknonstd { +template struct is_bitmask_enum : std::false_type {}; + +template +std::enable_if_t::value, bool> constexpr Any(E e) { + return static_cast>(e) != 0; +} +} // namespace sknonstd + +template +std::enable_if_t::value, E> constexpr operator|(E l, E r) { + using U = std::underlying_type_t; + return static_cast(static_cast(l) | static_cast(r)); +} + +template +std::enable_if_t::value, E&> constexpr operator|=(E& l, E r) { + return l = l | r; +} + +template +std::enable_if_t::value, E> constexpr operator&(E l, E r) { + using U = std::underlying_type_t; + return static_cast(static_cast(l) & static_cast(r)); +} + +template +std::enable_if_t::value, E&> constexpr operator&=(E& l, E r) { + return l = l & r; +} + +template +std::enable_if_t::value, E> constexpr operator^(E l, E r) { + using U = std::underlying_type_t; + return static_cast(static_cast(l) ^ static_cast(r)); +} + +template +std::enable_if_t::value, E&> constexpr operator^=(E& l, E r) { + return l = l ^ r; +} + +template +std::enable_if_t::value, E> constexpr operator~(E e) { + return static_cast(~static_cast>(e)); +} + +#endif // SkEnumOperators_DEFINED diff --git a/gfx/skia/skia/include/private/SkChecksum.h b/gfx/skia/skia/include/private/SkChecksum.h new file mode 100644 index 0000000000..d36e726089 --- /dev/null +++ b/gfx/skia/skia/include/private/SkChecksum.h @@ -0,0 +1,81 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkChecksum_DEFINED +#define SkChecksum_DEFINED + +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/SkOpts_spi.h" +#include "include/private/base/SkTLogic.h" + +#include +#include + +class SkChecksum { +public: + SkChecksum() = default; + // Make noncopyable + SkChecksum(const SkChecksum&) = delete; + SkChecksum& operator=(const SkChecksum&) = delete; + + /** + * uint32_t -> uint32_t hash, useful for when you're about to trucate this hash but you + * suspect its low bits aren't well mixed. + * + * This is the Murmur3 finalizer. + */ + static uint32_t Mix(uint32_t hash) { + hash ^= hash >> 16; + hash *= 0x85ebca6b; + hash ^= hash >> 13; + hash *= 0xc2b2ae35; + hash ^= hash >> 16; + return hash; + } + + /** + * uint32_t -> uint32_t hash, useful for when you're about to trucate this hash but you + * suspect its low bits aren't well mixed. + * + * This version is 2-lines cheaper than Mix, but seems to be sufficient for the font cache. + */ + static uint32_t CheapMix(uint32_t hash) { + hash ^= hash >> 16; + hash *= 0x85ebca6b; + hash ^= hash >> 16; + return hash; + } +}; + +// SkGoodHash should usually be your first choice in hashing data. +// It should be both reasonably fast and high quality. +struct SkGoodHash { + template + std::enable_if_t operator()(const K& k) const { + return SkChecksum::Mix(*(const uint32_t*)&k); + } + + template + std::enable_if_t operator()(const K& k) const { + return SkOpts::hash_fn(&k, sizeof(K), 0); + } + + uint32_t operator()(const SkString& k) const { + return SkOpts::hash_fn(k.c_str(), k.size(), 0); + } + + uint32_t operator()(const std::string& k) const { + return SkOpts::hash_fn(k.c_str(), k.size(), 0); + } + + uint32_t operator()(std::string_view k) const { + return SkOpts::hash_fn(k.data(), k.size(), 0); + } +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkColorData.h b/gfx/skia/skia/include/private/SkColorData.h new file mode 100644 index 0000000000..1bef596a36 --- /dev/null +++ b/gfx/skia/skia/include/private/SkColorData.h @@ -0,0 +1,386 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorData_DEFINED +#define SkColorData_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkColorPriv.h" +#include "include/private/base/SkTo.h" + +//////////////////////////////////////////////////////////////////////////////////////////// +// Convert a 16bit pixel to a 32bit pixel + +#define SK_R16_BITS 5 +#define SK_G16_BITS 6 +#define SK_B16_BITS 5 + +#define SK_R16_SHIFT (SK_B16_BITS + SK_G16_BITS) +#define SK_G16_SHIFT (SK_B16_BITS) +#define SK_B16_SHIFT 0 + +#define SK_R16_MASK ((1 << SK_R16_BITS) - 1) +#define SK_G16_MASK ((1 << SK_G16_BITS) - 1) +#define SK_B16_MASK ((1 << SK_B16_BITS) - 1) + +#define SkGetPackedR16(color) (((unsigned)(color) >> SK_R16_SHIFT) & SK_R16_MASK) +#define SkGetPackedG16(color) (((unsigned)(color) >> SK_G16_SHIFT) & SK_G16_MASK) +#define SkGetPackedB16(color) (((unsigned)(color) >> SK_B16_SHIFT) & SK_B16_MASK) + +static inline unsigned SkR16ToR32(unsigned r) { + return (r << (8 - SK_R16_BITS)) | (r >> (2 * SK_R16_BITS - 8)); +} + +static inline unsigned SkG16ToG32(unsigned g) { + return (g << (8 - SK_G16_BITS)) | (g >> (2 * SK_G16_BITS - 8)); +} + +static inline unsigned SkB16ToB32(unsigned b) { + return (b << (8 - SK_B16_BITS)) | (b >> (2 * SK_B16_BITS - 8)); +} + +#define SkPacked16ToR32(c) SkR16ToR32(SkGetPackedR16(c)) +#define SkPacked16ToG32(c) SkG16ToG32(SkGetPackedG16(c)) +#define SkPacked16ToB32(c) SkB16ToB32(SkGetPackedB16(c)) + +////////////////////////////////////////////////////////////////////////////// + +#define SkASSERT_IS_BYTE(x) SkASSERT(0 == ((x) & ~0xFFu)) + +// Reverse the bytes coorsponding to RED and BLUE in a packed pixels. Note the +// pair of them are in the same 2 slots in both RGBA and BGRA, thus there is +// no need to pass in the colortype to this function. +static inline uint32_t SkSwizzle_RB(uint32_t c) { + static const uint32_t kRBMask = (0xFF << SK_R32_SHIFT) | (0xFF << SK_B32_SHIFT); + + unsigned c0 = (c >> SK_R32_SHIFT) & 0xFF; + unsigned c1 = (c >> SK_B32_SHIFT) & 0xFF; + return (c & ~kRBMask) | (c0 << SK_B32_SHIFT) | (c1 << SK_R32_SHIFT); +} + +static inline uint32_t SkPackARGB_as_RGBA(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + SkASSERT_IS_BYTE(a); + SkASSERT_IS_BYTE(r); + SkASSERT_IS_BYTE(g); + SkASSERT_IS_BYTE(b); + return (a << SK_RGBA_A32_SHIFT) | (r << SK_RGBA_R32_SHIFT) | + (g << SK_RGBA_G32_SHIFT) | (b << SK_RGBA_B32_SHIFT); +} + +static inline uint32_t SkPackARGB_as_BGRA(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + SkASSERT_IS_BYTE(a); + SkASSERT_IS_BYTE(r); + SkASSERT_IS_BYTE(g); + SkASSERT_IS_BYTE(b); + return (a << SK_BGRA_A32_SHIFT) | (r << SK_BGRA_R32_SHIFT) | + (g << SK_BGRA_G32_SHIFT) | (b << SK_BGRA_B32_SHIFT); +} + +static inline SkPMColor SkSwizzle_RGBA_to_PMColor(uint32_t c) { +#ifdef SK_PMCOLOR_IS_RGBA + return c; +#else + return SkSwizzle_RB(c); +#endif +} + +static inline SkPMColor SkSwizzle_BGRA_to_PMColor(uint32_t c) { +#ifdef SK_PMCOLOR_IS_BGRA + return c; +#else + return SkSwizzle_RB(c); +#endif +} + +////////////////////////////////////////////////////////////////////////////// + +///@{ +/** See ITU-R Recommendation BT.709 at http://www.itu.int/rec/R-REC-BT.709/ .*/ +#define SK_ITU_BT709_LUM_COEFF_R (0.2126f) +#define SK_ITU_BT709_LUM_COEFF_G (0.7152f) +#define SK_ITU_BT709_LUM_COEFF_B (0.0722f) +///@} + +///@{ +/** A float value which specifies this channel's contribution to luminance. */ +#define SK_LUM_COEFF_R SK_ITU_BT709_LUM_COEFF_R +#define SK_LUM_COEFF_G SK_ITU_BT709_LUM_COEFF_G +#define SK_LUM_COEFF_B SK_ITU_BT709_LUM_COEFF_B +///@} + +/** Computes the luminance from the given r, g, and b in accordance with + SK_LUM_COEFF_X. For correct results, r, g, and b should be in linear space. +*/ +static inline U8CPU SkComputeLuminance(U8CPU r, U8CPU g, U8CPU b) { + //The following is + //r * SK_LUM_COEFF_R + g * SK_LUM_COEFF_G + b * SK_LUM_COEFF_B + //with SK_LUM_COEFF_X in 1.8 fixed point (rounding adjusted to sum to 256). + return (r * 54 + g * 183 + b * 19) >> 8; +} + +/** Calculates 256 - (value * alpha256) / 255 in range [0,256], + * for [0,255] value and [0,256] alpha256. + */ +static inline U16CPU SkAlphaMulInv256(U16CPU value, U16CPU alpha256) { + unsigned prod = 0xFFFF - value * alpha256; + return (prod + (prod >> 8)) >> 8; +} + +// The caller may want negative values, so keep all params signed (int) +// so we don't accidentally slip into unsigned math and lose the sign +// extension when we shift (in SkAlphaMul) +static inline int SkAlphaBlend(int src, int dst, int scale256) { + SkASSERT((unsigned)scale256 <= 256); + return dst + SkAlphaMul(src - dst, scale256); +} + +static inline uint16_t SkPackRGB16(unsigned r, unsigned g, unsigned b) { + SkASSERT(r <= SK_R16_MASK); + SkASSERT(g <= SK_G16_MASK); + SkASSERT(b <= SK_B16_MASK); + + return SkToU16((r << SK_R16_SHIFT) | (g << SK_G16_SHIFT) | (b << SK_B16_SHIFT)); +} + +#define SK_R16_MASK_IN_PLACE (SK_R16_MASK << SK_R16_SHIFT) +#define SK_G16_MASK_IN_PLACE (SK_G16_MASK << SK_G16_SHIFT) +#define SK_B16_MASK_IN_PLACE (SK_B16_MASK << SK_B16_SHIFT) + +/////////////////////////////////////////////////////////////////////////////// + +/** + * Abstract 4-byte interpolation, implemented on top of SkPMColor + * utility functions. Third parameter controls blending of the first two: + * (src, dst, 0) returns dst + * (src, dst, 0xFF) returns src + * scale is [0..256], unlike SkFourByteInterp which takes [0..255] + */ +static inline SkPMColor SkFourByteInterp256(SkPMColor src, SkPMColor dst, int scale) { + unsigned a = SkTo(SkAlphaBlend(SkGetPackedA32(src), SkGetPackedA32(dst), scale)); + unsigned r = SkTo(SkAlphaBlend(SkGetPackedR32(src), SkGetPackedR32(dst), scale)); + unsigned g = SkTo(SkAlphaBlend(SkGetPackedG32(src), SkGetPackedG32(dst), scale)); + unsigned b = SkTo(SkAlphaBlend(SkGetPackedB32(src), SkGetPackedB32(dst), scale)); + + return SkPackARGB32(a, r, g, b); +} + +/** + * Abstract 4-byte interpolation, implemented on top of SkPMColor + * utility functions. Third parameter controls blending of the first two: + * (src, dst, 0) returns dst + * (src, dst, 0xFF) returns src + */ +static inline SkPMColor SkFourByteInterp(SkPMColor src, SkPMColor dst, U8CPU srcWeight) { + int scale = (int)SkAlpha255To256(srcWeight); + return SkFourByteInterp256(src, dst, scale); +} + +/** + * 0xAARRGGBB -> 0x00AA00GG, 0x00RR00BB + */ +static inline void SkSplay(uint32_t color, uint32_t* ag, uint32_t* rb) { + const uint32_t mask = 0x00FF00FF; + *ag = (color >> 8) & mask; + *rb = color & mask; +} + +/** + * 0xAARRGGBB -> 0x00AA00GG00RR00BB + * (note, ARGB -> AGRB) + */ +static inline uint64_t SkSplay(uint32_t color) { + const uint32_t mask = 0x00FF00FF; + uint64_t agrb = (color >> 8) & mask; // 0x0000000000AA00GG + agrb <<= 32; // 0x00AA00GG00000000 + agrb |= color & mask; // 0x00AA00GG00RR00BB + return agrb; +} + +/** + * 0xAAxxGGxx, 0xRRxxBBxx-> 0xAARRGGBB + */ +static inline uint32_t SkUnsplay(uint32_t ag, uint32_t rb) { + const uint32_t mask = 0xFF00FF00; + return (ag & mask) | ((rb & mask) >> 8); +} + +/** + * 0xAAxxGGxxRRxxBBxx -> 0xAARRGGBB + * (note, AGRB -> ARGB) + */ +static inline uint32_t SkUnsplay(uint64_t agrb) { + const uint32_t mask = 0xFF00FF00; + return SkPMColor( + ((agrb & mask) >> 8) | // 0x00RR00BB + ((agrb >> 32) & mask)); // 0xAARRGGBB +} + +static inline SkPMColor SkFastFourByteInterp256_32(SkPMColor src, SkPMColor dst, unsigned scale) { + SkASSERT(scale <= 256); + + // Two 8-bit blends per two 32-bit registers, with space to make sure the math doesn't collide. + uint32_t src_ag, src_rb, dst_ag, dst_rb; + SkSplay(src, &src_ag, &src_rb); + SkSplay(dst, &dst_ag, &dst_rb); + + const uint32_t ret_ag = src_ag * scale + (256 - scale) * dst_ag; + const uint32_t ret_rb = src_rb * scale + (256 - scale) * dst_rb; + + return SkUnsplay(ret_ag, ret_rb); +} + +static inline SkPMColor SkFastFourByteInterp256_64(SkPMColor src, SkPMColor dst, unsigned scale) { + SkASSERT(scale <= 256); + // Four 8-bit blends in one 64-bit register, with space to make sure the math doesn't collide. + return SkUnsplay(SkSplay(src) * scale + (256-scale) * SkSplay(dst)); +} + +// TODO(mtklein): Replace slow versions with fast versions, using scale + (scale>>7) everywhere. + +/** + * Same as SkFourByteInterp256, but faster. + */ +static inline SkPMColor SkFastFourByteInterp256(SkPMColor src, SkPMColor dst, unsigned scale) { + // On a 64-bit machine, _64 is about 10% faster than _32, but ~40% slower on a 32-bit machine. + if (sizeof(void*) == 4) { + return SkFastFourByteInterp256_32(src, dst, scale); + } else { + return SkFastFourByteInterp256_64(src, dst, scale); + } +} + +/** + * Nearly the same as SkFourByteInterp, but faster and a touch more accurate, due to better + * srcWeight scaling to [0, 256]. + */ +static inline SkPMColor SkFastFourByteInterp(SkPMColor src, SkPMColor dst, U8CPU srcWeight) { + SkASSERT(srcWeight <= 255); + // scale = srcWeight + (srcWeight >> 7) is more accurate than + // scale = srcWeight + 1, but 7% slower + return SkFastFourByteInterp256(src, dst, srcWeight + (srcWeight >> 7)); +} + +/** + * Interpolates between colors src and dst using [0,256] scale. + */ +static inline SkPMColor SkPMLerp(SkPMColor src, SkPMColor dst, unsigned scale) { + return SkFastFourByteInterp256(src, dst, scale); +} + +static inline SkPMColor SkBlendARGB32(SkPMColor src, SkPMColor dst, U8CPU aa) { + SkASSERT((unsigned)aa <= 255); + + unsigned src_scale = SkAlpha255To256(aa); + unsigned dst_scale = SkAlphaMulInv256(SkGetPackedA32(src), src_scale); + + const uint32_t mask = 0xFF00FF; + + uint32_t src_rb = (src & mask) * src_scale; + uint32_t src_ag = ((src >> 8) & mask) * src_scale; + + uint32_t dst_rb = (dst & mask) * dst_scale; + uint32_t dst_ag = ((dst >> 8) & mask) * dst_scale; + + return (((src_rb + dst_rb) >> 8) & mask) | ((src_ag + dst_ag) & ~mask); +} + +//////////////////////////////////////////////////////////////////////////////////////////// +// Convert a 32bit pixel to a 16bit pixel (no dither) + +#define SkR32ToR16_MACRO(r) ((unsigned)(r) >> (SK_R32_BITS - SK_R16_BITS)) +#define SkG32ToG16_MACRO(g) ((unsigned)(g) >> (SK_G32_BITS - SK_G16_BITS)) +#define SkB32ToB16_MACRO(b) ((unsigned)(b) >> (SK_B32_BITS - SK_B16_BITS)) + +#ifdef SK_DEBUG + static inline unsigned SkR32ToR16(unsigned r) { + SkR32Assert(r); + return SkR32ToR16_MACRO(r); + } + static inline unsigned SkG32ToG16(unsigned g) { + SkG32Assert(g); + return SkG32ToG16_MACRO(g); + } + static inline unsigned SkB32ToB16(unsigned b) { + SkB32Assert(b); + return SkB32ToB16_MACRO(b); + } +#else + #define SkR32ToR16(r) SkR32ToR16_MACRO(r) + #define SkG32ToG16(g) SkG32ToG16_MACRO(g) + #define SkB32ToB16(b) SkB32ToB16_MACRO(b) +#endif + +static inline U16CPU SkPixel32ToPixel16(SkPMColor c) { + unsigned r = ((c >> (SK_R32_SHIFT + (8 - SK_R16_BITS))) & SK_R16_MASK) << SK_R16_SHIFT; + unsigned g = ((c >> (SK_G32_SHIFT + (8 - SK_G16_BITS))) & SK_G16_MASK) << SK_G16_SHIFT; + unsigned b = ((c >> (SK_B32_SHIFT + (8 - SK_B16_BITS))) & SK_B16_MASK) << SK_B16_SHIFT; + return r | g | b; +} + +static inline U16CPU SkPack888ToRGB16(U8CPU r, U8CPU g, U8CPU b) { + return (SkR32ToR16(r) << SK_R16_SHIFT) | + (SkG32ToG16(g) << SK_G16_SHIFT) | + (SkB32ToB16(b) << SK_B16_SHIFT); +} + +///////////////////////////////////////////////////////////////////////////////////////// + +static inline SkColor SkPixel16ToColor(U16CPU src) { + SkASSERT(src == SkToU16(src)); + + unsigned r = SkPacked16ToR32(src); + unsigned g = SkPacked16ToG32(src); + unsigned b = SkPacked16ToB32(src); + + SkASSERT((r >> (8 - SK_R16_BITS)) == SkGetPackedR16(src)); + SkASSERT((g >> (8 - SK_G16_BITS)) == SkGetPackedG16(src)); + SkASSERT((b >> (8 - SK_B16_BITS)) == SkGetPackedB16(src)); + + return SkColorSetRGB(r, g, b); +} + +/////////////////////////////////////////////////////////////////////////////// + +typedef uint16_t SkPMColor16; + +// Put in OpenGL order (r g b a) +#define SK_A4444_SHIFT 0 +#define SK_R4444_SHIFT 12 +#define SK_G4444_SHIFT 8 +#define SK_B4444_SHIFT 4 + +static inline U8CPU SkReplicateNibble(unsigned nib) { + SkASSERT(nib <= 0xF); + return (nib << 4) | nib; +} + +#define SkGetPackedA4444(c) (((unsigned)(c) >> SK_A4444_SHIFT) & 0xF) +#define SkGetPackedR4444(c) (((unsigned)(c) >> SK_R4444_SHIFT) & 0xF) +#define SkGetPackedG4444(c) (((unsigned)(c) >> SK_G4444_SHIFT) & 0xF) +#define SkGetPackedB4444(c) (((unsigned)(c) >> SK_B4444_SHIFT) & 0xF) + +#define SkPacked4444ToA32(c) SkReplicateNibble(SkGetPackedA4444(c)) + +static inline SkPMColor SkPixel4444ToPixel32(U16CPU c) { + uint32_t d = (SkGetPackedA4444(c) << SK_A32_SHIFT) | + (SkGetPackedR4444(c) << SK_R32_SHIFT) | + (SkGetPackedG4444(c) << SK_G32_SHIFT) | + (SkGetPackedB4444(c) << SK_B32_SHIFT); + return d | (d << 4); +} + +using SkPMColor4f = SkRGBA4f; + +constexpr SkPMColor4f SK_PMColor4fTRANSPARENT = { 0, 0, 0, 0 }; +constexpr SkPMColor4f SK_PMColor4fBLACK = { 0, 0, 0, 1 }; +constexpr SkPMColor4f SK_PMColor4fWHITE = { 1, 1, 1, 1 }; +constexpr SkPMColor4f SK_PMColor4fILLEGAL = { SK_FloatNegativeInfinity, + SK_FloatNegativeInfinity, + SK_FloatNegativeInfinity, + SK_FloatNegativeInfinity }; + +#endif diff --git a/gfx/skia/skia/include/private/SkEncodedInfo.h b/gfx/skia/skia/include/private/SkEncodedInfo.h new file mode 100644 index 0000000000..74e2ad1480 --- /dev/null +++ b/gfx/skia/skia/include/private/SkEncodedInfo.h @@ -0,0 +1,272 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEncodedInfo_DEFINED +#define SkEncodedInfo_DEFINED + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "modules/skcms/skcms.h" + +#include +#include +#include + +struct SkEncodedInfo { +public: + class ICCProfile { + public: + static std::unique_ptr Make(sk_sp); + static std::unique_ptr Make(const skcms_ICCProfile&); + + const skcms_ICCProfile* profile() const { return &fProfile; } + private: + ICCProfile(const skcms_ICCProfile&, sk_sp = nullptr); + + skcms_ICCProfile fProfile; + sk_sp fData; + }; + + enum Alpha { + kOpaque_Alpha, + kUnpremul_Alpha, + + // Each pixel is either fully opaque or fully transparent. + // There is no difference between requesting kPremul or kUnpremul. + kBinary_Alpha, + }; + + /* + * We strive to make the number of components per pixel obvious through + * our naming conventions. + * Ex: kRGB has 3 components. kRGBA has 4 components. + * + * This sometimes results in redundant Alpha and Color information. + * Ex: kRGB images must also be kOpaque. + */ + enum Color { + // PNG, WBMP + kGray_Color, + + // PNG + kGrayAlpha_Color, + + // PNG with Skia-specific sBIT + // Like kGrayAlpha, except this expects to be treated as + // kAlpha_8_SkColorType, which ignores the gray component. If + // decoded to full color (e.g. kN32), the gray component is respected + // (so it can share code with kGrayAlpha). + kXAlpha_Color, + + // PNG + // 565 images may be encoded to PNG by specifying the number of + // significant bits for each channel. This is a strange 565 + // representation because the image is still encoded with 8 bits per + // component. + k565_Color, + + // PNG, GIF, BMP + kPalette_Color, + + // PNG, RAW + kRGB_Color, + kRGBA_Color, + + // BMP + kBGR_Color, + kBGRX_Color, + kBGRA_Color, + + // JPEG, WEBP + kYUV_Color, + + // WEBP + kYUVA_Color, + + // JPEG + // Photoshop actually writes inverted CMYK data into JPEGs, where zero + // represents 100% ink coverage. For this reason, we treat CMYK JPEGs + // as having inverted CMYK. libjpeg-turbo warns that this may break + // other applications, but the CMYK JPEGs we see on the web expect to + // be treated as inverted CMYK. + kInvertedCMYK_Color, + kYCCK_Color, + }; + + static SkEncodedInfo Make(int width, int height, Color color, Alpha alpha, + int bitsPerComponent) { + return Make(width, height, color, alpha, bitsPerComponent, nullptr); + } + + static SkEncodedInfo Make(int width, int height, Color color, + Alpha alpha, int bitsPerComponent, std::unique_ptr profile) { + return Make(width, height, color, alpha, /*bitsPerComponent*/ bitsPerComponent, + std::move(profile), /*colorDepth*/ bitsPerComponent); + } + + static SkEncodedInfo Make(int width, int height, Color color, + Alpha alpha, int bitsPerComponent, std::unique_ptr profile, + int colorDepth) { + SkASSERT(1 == bitsPerComponent || + 2 == bitsPerComponent || + 4 == bitsPerComponent || + 8 == bitsPerComponent || + 16 == bitsPerComponent); + + switch (color) { + case kGray_Color: + SkASSERT(kOpaque_Alpha == alpha); + break; + case kGrayAlpha_Color: + SkASSERT(kOpaque_Alpha != alpha); + break; + case kPalette_Color: + SkASSERT(16 != bitsPerComponent); + break; + case kRGB_Color: + case kBGR_Color: + case kBGRX_Color: + SkASSERT(kOpaque_Alpha == alpha); + SkASSERT(bitsPerComponent >= 8); + break; + case kYUV_Color: + case kInvertedCMYK_Color: + case kYCCK_Color: + SkASSERT(kOpaque_Alpha == alpha); + SkASSERT(8 == bitsPerComponent); + break; + case kRGBA_Color: + SkASSERT(bitsPerComponent >= 8); + break; + case kBGRA_Color: + case kYUVA_Color: + SkASSERT(8 == bitsPerComponent); + break; + case kXAlpha_Color: + SkASSERT(kUnpremul_Alpha == alpha); + SkASSERT(8 == bitsPerComponent); + break; + case k565_Color: + SkASSERT(kOpaque_Alpha == alpha); + SkASSERT(8 == bitsPerComponent); + break; + default: + SkASSERT(false); + break; + } + + return SkEncodedInfo(width, height, color, alpha, + bitsPerComponent, colorDepth, std::move(profile)); + } + + /* + * Returns a recommended SkImageInfo. + * + * TODO: Leave this up to the client. + */ + SkImageInfo makeImageInfo() const { + auto ct = kGray_Color == fColor ? kGray_8_SkColorType : + kXAlpha_Color == fColor ? kAlpha_8_SkColorType : + k565_Color == fColor ? kRGB_565_SkColorType : + kN32_SkColorType ; + auto alpha = kOpaque_Alpha == fAlpha ? kOpaque_SkAlphaType + : kUnpremul_SkAlphaType; + sk_sp cs = fProfile ? SkColorSpace::Make(*fProfile->profile()) + : nullptr; + if (!cs) { + cs = SkColorSpace::MakeSRGB(); + } + return SkImageInfo::Make(fWidth, fHeight, ct, alpha, std::move(cs)); + } + + int width() const { return fWidth; } + int height() const { return fHeight; } + Color color() const { return fColor; } + Alpha alpha() const { return fAlpha; } + bool opaque() const { return fAlpha == kOpaque_Alpha; } + const skcms_ICCProfile* profile() const { + if (!fProfile) return nullptr; + return fProfile->profile(); + } + + uint8_t bitsPerComponent() const { return fBitsPerComponent; } + + uint8_t bitsPerPixel() const { + switch (fColor) { + case kGray_Color: + return fBitsPerComponent; + case kXAlpha_Color: + case kGrayAlpha_Color: + return 2 * fBitsPerComponent; + case kPalette_Color: + return fBitsPerComponent; + case kRGB_Color: + case kBGR_Color: + case kYUV_Color: + case k565_Color: + return 3 * fBitsPerComponent; + case kRGBA_Color: + case kBGRA_Color: + case kBGRX_Color: + case kYUVA_Color: + case kInvertedCMYK_Color: + case kYCCK_Color: + return 4 * fBitsPerComponent; + default: + SkASSERT(false); + return 0; + } + } + + SkEncodedInfo(const SkEncodedInfo& orig) = delete; + SkEncodedInfo& operator=(const SkEncodedInfo&) = delete; + + SkEncodedInfo(SkEncodedInfo&& orig) = default; + SkEncodedInfo& operator=(SkEncodedInfo&&) = default; + + // Explicit copy method, to avoid accidental copying. + SkEncodedInfo copy() const { + auto copy = SkEncodedInfo::Make( + fWidth, fHeight, fColor, fAlpha, fBitsPerComponent, nullptr, fColorDepth); + if (fProfile) { + copy.fProfile = std::make_unique(*fProfile); + } + return copy; + } + + // Return number of bits of R/G/B channel + uint8_t getColorDepth() const { + return fColorDepth; + } + +private: + SkEncodedInfo(int width, int height, Color color, Alpha alpha, + uint8_t bitsPerComponent, uint8_t colorDepth, std::unique_ptr profile) + : fWidth(width) + , fHeight(height) + , fColor(color) + , fAlpha(alpha) + , fBitsPerComponent(bitsPerComponent) + , fColorDepth(colorDepth) + , fProfile(std::move(profile)) + {} + + int fWidth; + int fHeight; + Color fColor; + Alpha fAlpha; + uint8_t fBitsPerComponent; + uint8_t fColorDepth; + std::unique_ptr fProfile; +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkGainmapInfo.h b/gfx/skia/skia/include/private/SkGainmapInfo.h new file mode 100644 index 0000000000..d477371188 --- /dev/null +++ b/gfx/skia/skia/include/private/SkGainmapInfo.h @@ -0,0 +1,92 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGainmapInfo_DEFINED +#define SkGainmapInfo_DEFINED + +#include "include/core/SkColor.h" + +/** + * Gainmap rendering parameters. Suppose our display has HDR to SDR ratio of H and we wish to + * display an image with gainmap on this display. Let B be the pixel value from the base image + * in a color space that has the primaries of the base image and a linear transfer function. Let + * G be the pixel value from the gainmap. Let D be the output pixel in the same color space as B. + * The value of D is computed as follows: + * + * First, let W be a weight parameter determing how much the gainmap will be applied. + * W = clamp((log(H) - log(fDisplayRatioSdr)) / + * (log(fDisplayRatioHdr) - log(fDisplayRatioSdr), 0, 1) + * + * Next, let L be the gainmap value in log space. We compute this from the value G that was + * sampled from the texture as follows: + * L = mix(log(fGainmapRatioMin), log(fGainmapRatioMax), pow(G, fGainmapGamma)) + * + * Finally, apply the gainmap to compute D, the displayed pixel. If the base image is SDR then + * compute: + * D = (B + fEpsilonSdr) * exp(L * W) - fEpsilonHdr + * If the base image is HDR then compute: + * D = (B + fEpsilonHdr) * exp(L * (W - 1)) - fEpsilonSdr + * + * In the above math, log() is a natural logarithm and exp() is natural exponentiation. Note, + * however, that the base used for the log() and exp() functions does not affect the results of + * the computation (it cancels out, as long as the same base is used throughout). + */ +struct SkGainmapInfo { + /** + * Parameters for converting the gainmap from its image encoding to log space. These are + * specified per color channel. The alpha value is unused. + */ + SkColor4f fGainmapRatioMin = {1.f, 1.f, 1.f, 1.0}; + SkColor4f fGainmapRatioMax = {2.f, 2.f, 2.f, 1.0}; + SkColor4f fGainmapGamma = {1.f, 1.f, 1.f, 1.f}; + + /** + * Parameters sometimes used in gainmap computation to avoid numerical instability. + */ + SkColor4f fEpsilonSdr = {0.f, 0.f, 0.f, 1.0}; + SkColor4f fEpsilonHdr = {0.f, 0.f, 0.f, 1.0}; + + /** + * If the output display's HDR to SDR ratio is less or equal than fDisplayRatioSdr then the SDR + * rendition is displayed. If the output display's HDR to SDR ratio is greater or equal than + * fDisplayRatioHdr then the HDR rendition is displayed. If the output display's HDR to SDR + * ratio is between these values then an interpolation between the two is displayed using the + * math above. + */ + float fDisplayRatioSdr = 1.f; + float fDisplayRatioHdr = 2.f; + + /** + * Whether the base image is the SDR image or the HDR image. + */ + enum class BaseImageType { + kSDR, + kHDR, + }; + BaseImageType fBaseImageType = BaseImageType::kSDR; + + // TODO(ccameron): Remove these parameters after the new parameters roll into Android. + SkColor4f fLogRatioMin = {0.f, 0.f, 0.f, 1.0}; + SkColor4f fLogRatioMax = {1.f, 1.f, 1.f, 1.0}; + float fHdrRatioMin = 1.f; + float fHdrRatioMax = 50.f; + + /** + * The type of file that created this gainmap. + */ + enum class Type { + kUnknown, + kMultiPicture, + kJpegR_Linear, + kJpegR_HLG, + kJpegR_PQ, + kHDRGM, + }; + Type fType = Type::kUnknown; +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkGainmapShader.h b/gfx/skia/skia/include/private/SkGainmapShader.h new file mode 100644 index 0000000000..f490ab96a4 --- /dev/null +++ b/gfx/skia/skia/include/private/SkGainmapShader.h @@ -0,0 +1,53 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGainmapShader_DEFINED +#define SkGainmapShader_DEFINED + +#include "include/core/SkRefCnt.h" + +class SkColorSpace; +class SkShader; +class SkImage; +struct SkGainmapInfo; +struct SkRect; +struct SkSamplingOptions; + +/** + * A gainmap shader will apply a gainmap to an base image using the math described alongside the + * definition of SkGainmapInfo. + */ +class SK_API SkGainmapShader { +public: + /** + * Make a gainmap shader. + * + * When sampling the base image baseImage, the rectangle baseRect will be sampled to map to + * the rectangle dstRect. Sampling will be done according to baseSamplingOptions. + * + * When sampling the gainmap image gainmapImage, the rectangle gainmapRect will be sampled to + * map to the rectangle dstRect. Sampling will be done according to gainmapSamplingOptions. + * + * The gainmap will be applied according to the HDR to SDR ratio specified in dstHdrRatio. + * + * This shader must know the color space of the canvas that it will be rendered to. This color + * space must be specified in dstColorSpace. + * TODO(ccameron): Remove the need for dstColorSpace. + */ + static sk_sp Make(const sk_sp& baseImage, + const SkRect& baseRect, + const SkSamplingOptions& baseSamplingOptions, + const sk_sp& gainmapImage, + const SkRect& gainmapRect, + const SkSamplingOptions& gainmapSamplingOptions, + const SkGainmapInfo& gainmapInfo, + const SkRect& dstRect, + float dstHdrRatio, + sk_sp dstColorSpace); +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkIDChangeListener.h b/gfx/skia/skia/include/private/SkIDChangeListener.h new file mode 100644 index 0000000000..a32dae1a5a --- /dev/null +++ b/gfx/skia/skia/include/private/SkIDChangeListener.h @@ -0,0 +1,76 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkIDChangeListener_DEFINED +#define SkIDChangeListener_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkThreadAnnotations.h" + +#include + +/** + * Used to be notified when a gen/unique ID is invalidated, typically to preemptively purge + * associated items from a cache that are no longer reachable. The listener can + * be marked for deregistration if the cached item is remove before the listener is + * triggered. This prevents unbounded listener growth when cache items are routinely + * removed before the gen ID/unique ID is invalidated. + */ +class SkIDChangeListener : public SkRefCnt { +public: + SkIDChangeListener(); + + ~SkIDChangeListener() override; + + virtual void changed() = 0; + + /** + * Mark the listener is no longer needed. It should be removed and changed() should not be + * called. + */ + void markShouldDeregister() { fShouldDeregister.store(true, std::memory_order_relaxed); } + + /** Indicates whether markShouldDeregister was called. */ + bool shouldDeregister() { return fShouldDeregister.load(std::memory_order_acquire); } + + /** Manages a list of SkIDChangeListeners. */ + class List { + public: + List(); + + ~List(); + + /** + * Add a new listener to the list. It must not already be deregistered. Also clears out + * previously deregistered listeners. + */ + void add(sk_sp listener) SK_EXCLUDES(fMutex); + + /** + * The number of registered listeners (including deregisterd listeners that are yet-to-be + * removed. + */ + int count() const SK_EXCLUDES(fMutex); + + /** Calls changed() on all listeners that haven't been deregistered and resets the list. */ + void changed() SK_EXCLUDES(fMutex); + + /** Resets without calling changed() on the listeners. */ + void reset() SK_EXCLUDES(fMutex); + + private: + mutable SkMutex fMutex; + SkSTArray<1, sk_sp> fListeners SK_GUARDED_BY(fMutex); + }; + +private: + std::atomic fShouldDeregister; +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkJpegGainmapEncoder.h b/gfx/skia/skia/include/private/SkJpegGainmapEncoder.h new file mode 100644 index 0000000000..756de78b23 --- /dev/null +++ b/gfx/skia/skia/include/private/SkJpegGainmapEncoder.h @@ -0,0 +1,71 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkJpegGainmapEncoder_DEFINED +#define SkJpegGainmapEncoder_DEFINED + +#include "include/encode/SkJpegEncoder.h" + +class SkPixmap; +class SkWStream; +struct SkGainmapInfo; + +class SK_API SkJpegGainmapEncoder { +public: + /** + * Encode a JpegR image to |dst|. + * + * The base image is specified by |base|, and |baseOptions| controls the encoding behavior for + * the base image. + * + * The gainmap image is specified by |gainmap|, and |gainmapOptions| controls the encoding + * behavior for the gainmap image. + * + * The rendering behavior of the gainmap image is provided in |gainmapInfo|. Not all gainmap + * based images are compatible with JpegR. If the image is not compatible with JpegR, then + * convert the gainmap to a format that is capable with JpegR. This conversion may result in + * less precise quantization of the gainmap image. + * + * Returns true on success. Returns false on an invalid or unsupported |src|. + */ + static bool EncodeJpegR(SkWStream* dst, + const SkPixmap& base, + const SkJpegEncoder::Options& baseOptions, + const SkPixmap& gainmap, + const SkJpegEncoder::Options& gainmapOptions, + const SkGainmapInfo& gainmapInfo); + + /** + * Encode an HDRGM image to |dst|. + * + * The base image is specified by |base|, and |baseOptions| controls the encoding behavior for + * the base image. + * + * The gainmap image is specified by |gainmap|, and |gainmapOptions| controls the encoding + * behavior for the gainmap image. + * + * The rendering behavior of the gainmap image is provided in |gainmapInfo|. + * + * If |baseOptions| or |gainmapOptions| specify XMP metadata, then that metadata will be + * overwritten. + * + * Returns true on success. Returns false on an invalid or unsupported |src|. + */ + static bool EncodeHDRGM(SkWStream* dst, + const SkPixmap& base, + const SkJpegEncoder::Options& baseOptions, + const SkPixmap& gainmap, + const SkJpegEncoder::Options& gainmapOptions, + const SkGainmapInfo& gainmapInfo); + + /** + * Write a Multi Picture Format containing the |imageCount| images specified by |images|. + */ + static bool MakeMPF(SkWStream* dst, const SkData** images, size_t imageCount); +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkOpts_spi.h b/gfx/skia/skia/include/private/SkOpts_spi.h new file mode 100644 index 0000000000..6e888b77c8 --- /dev/null +++ b/gfx/skia/skia/include/private/SkOpts_spi.h @@ -0,0 +1,23 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOpts_spi_DEFINED +#define SkOpts_spi_DEFINED + +#include "include/private/base/SkAPI.h" + +#include + +// These are exposed as SK_SPI (e.g. SkParagraph), the rest of SkOpts is +// declared in src/core + +namespace SkOpts { + // The fastest high quality 32-bit hash we can provide on this platform. + extern uint32_t SK_SPI (*hash_fn)(const void* data, size_t bytes, uint32_t seed); +} // namespace SkOpts + +#endif diff --git a/gfx/skia/skia/include/private/SkPathRef.h b/gfx/skia/skia/include/private/SkPathRef.h new file mode 100644 index 0000000000..5e48086d35 --- /dev/null +++ b/gfx/skia/skia/include/private/SkPathRef.h @@ -0,0 +1,539 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathRef_DEFINED +#define SkPathRef_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/SkIDChangeListener.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTo.h" + +#include +#include +#include +#include +#include + +class SkMatrix; +class SkRRect; + +// These are computed from a stream of verbs +struct SkPathVerbAnalysis { + bool valid; + int points, weights; + unsigned segmentMask; +}; +SkPathVerbAnalysis sk_path_analyze_verbs(const uint8_t verbs[], int count); + + +/** + * Holds the path verbs and points. It is versioned by a generation ID. None of its public methods + * modify the contents. To modify or append to the verbs/points wrap the SkPathRef in an + * SkPathRef::Editor object. Installing the editor resets the generation ID. It also performs + * copy-on-write if the SkPathRef is shared by multiple SkPaths. The caller passes the Editor's + * constructor a pointer to a sk_sp, which may be updated to point to a new SkPathRef + * after the editor's constructor returns. + * + * The points and verbs are stored in a single allocation. The points are at the begining of the + * allocation while the verbs are stored at end of the allocation, in reverse order. Thus the points + * and verbs both grow into the middle of the allocation until the meet. To access verb i in the + * verb array use ref.verbs()[~i] (because verbs() returns a pointer just beyond the first + * logical verb or the last verb in memory). + */ + +class SK_API SkPathRef final : public SkNVRefCnt { +public: + // See https://bugs.chromium.org/p/skia/issues/detail?id=13817 for how these sizes were + // determined. + using PointsArray = SkSTArray<4, SkPoint>; + using VerbsArray = SkSTArray<4, uint8_t>; + using ConicWeightsArray = SkSTArray<2, SkScalar>; + + SkPathRef(PointsArray points, VerbsArray verbs, ConicWeightsArray weights, + unsigned segmentMask) + : fPoints(std::move(points)) + , fVerbs(std::move(verbs)) + , fConicWeights(std::move(weights)) + { + fBoundsIsDirty = true; // this also invalidates fIsFinite + fGenerationID = 0; // recompute + fSegmentMask = segmentMask; + fIsOval = false; + fIsRRect = false; + // The next two values don't matter unless fIsOval or fIsRRect are true. + fRRectOrOvalIsCCW = false; + fRRectOrOvalStartIdx = 0xAC; + SkDEBUGCODE(fEditorsAttached.store(0);) + + this->computeBounds(); // do this now, before we worry about multiple owners/threads + SkDEBUGCODE(this->validate();) + } + + class Editor { + public: + Editor(sk_sp* pathRef, + int incReserveVerbs = 0, + int incReservePoints = 0); + + ~Editor() { SkDEBUGCODE(fPathRef->fEditorsAttached--;) } + + /** + * Returns the array of points. + */ + SkPoint* writablePoints() { return fPathRef->getWritablePoints(); } + const SkPoint* points() const { return fPathRef->points(); } + + /** + * Gets the ith point. Shortcut for this->points() + i + */ + SkPoint* atPoint(int i) { return fPathRef->getWritablePoints() + i; } + const SkPoint* atPoint(int i) const { return &fPathRef->fPoints[i]; } + + /** + * Adds the verb and allocates space for the number of points indicated by the verb. The + * return value is a pointer to where the points for the verb should be written. + * 'weight' is only used if 'verb' is kConic_Verb + */ + SkPoint* growForVerb(int /*SkPath::Verb*/ verb, SkScalar weight = 0) { + SkDEBUGCODE(fPathRef->validate();) + return fPathRef->growForVerb(verb, weight); + } + + /** + * Allocates space for multiple instances of a particular verb and the + * requisite points & weights. + * The return pointer points at the first new point (indexed normally []). + * If 'verb' is kConic_Verb, 'weights' will return a pointer to the + * space for the conic weights (indexed normally). + */ + SkPoint* growForRepeatedVerb(int /*SkPath::Verb*/ verb, + int numVbs, + SkScalar** weights = nullptr) { + return fPathRef->growForRepeatedVerb(verb, numVbs, weights); + } + + /** + * Concatenates all verbs from 'path' onto the pathRef's verbs array. Increases the point + * count by the number of points in 'path', and the conic weight count by the number of + * conics in 'path'. + * + * Returns pointers to the uninitialized points and conic weights data. + */ + std::tuple growForVerbsInPath(const SkPathRef& path) { + return fPathRef->growForVerbsInPath(path); + } + + /** + * Resets the path ref to a new verb and point count. The new verbs and points are + * uninitialized. + */ + void resetToSize(int newVerbCnt, int newPointCnt, int newConicCount) { + fPathRef->resetToSize(newVerbCnt, newPointCnt, newConicCount); + } + + /** + * Gets the path ref that is wrapped in the Editor. + */ + SkPathRef* pathRef() { return fPathRef; } + + void setIsOval(bool isOval, bool isCCW, unsigned start) { + fPathRef->setIsOval(isOval, isCCW, start); + } + + void setIsRRect(bool isRRect, bool isCCW, unsigned start) { + fPathRef->setIsRRect(isRRect, isCCW, start); + } + + void setBounds(const SkRect& rect) { fPathRef->setBounds(rect); } + + private: + SkPathRef* fPathRef; + }; + + class SK_API Iter { + public: + Iter(); + Iter(const SkPathRef&); + + void setPathRef(const SkPathRef&); + + /** Return the next verb in this iteration of the path. When all + segments have been visited, return kDone_Verb. + + If any point in the path is non-finite, return kDone_Verb immediately. + + @param pts The points representing the current verb and/or segment + This must not be NULL. + @return The verb for the current segment + */ + uint8_t next(SkPoint pts[4]); + uint8_t peek() const; + + SkScalar conicWeight() const { return *fConicWeights; } + + private: + const SkPoint* fPts; + const uint8_t* fVerbs; + const uint8_t* fVerbStop; + const SkScalar* fConicWeights; + }; + +public: + /** + * Gets a path ref with no verbs or points. + */ + static SkPathRef* CreateEmpty(); + + /** + * Returns true if all of the points in this path are finite, meaning there + * are no infinities and no NaNs. + */ + bool isFinite() const { + if (fBoundsIsDirty) { + this->computeBounds(); + } + return SkToBool(fIsFinite); + } + + /** + * Returns a mask, where each bit corresponding to a SegmentMask is + * set if the path contains 1 or more segments of that type. + * Returns 0 for an empty path (no segments). + */ + uint32_t getSegmentMasks() const { return fSegmentMask; } + + /** Returns true if the path is an oval. + * + * @param rect returns the bounding rect of this oval. It's a circle + * if the height and width are the same. + * @param isCCW is the oval CCW (or CW if false). + * @param start indicates where the contour starts on the oval (see + * SkPath::addOval for intepretation of the index). + * + * @return true if this path is an oval. + * Tracking whether a path is an oval is considered an + * optimization for performance and so some paths that are in + * fact ovals can report false. + */ + bool isOval(SkRect* rect, bool* isCCW, unsigned* start) const { + if (fIsOval) { + if (rect) { + *rect = this->getBounds(); + } + if (isCCW) { + *isCCW = SkToBool(fRRectOrOvalIsCCW); + } + if (start) { + *start = fRRectOrOvalStartIdx; + } + } + + return SkToBool(fIsOval); + } + + bool isRRect(SkRRect* rrect, bool* isCCW, unsigned* start) const; + + bool hasComputedBounds() const { + return !fBoundsIsDirty; + } + + /** Returns the bounds of the path's points. If the path contains 0 or 1 + points, the bounds is set to (0,0,0,0), and isEmpty() will return true. + Note: this bounds may be larger than the actual shape, since curves + do not extend as far as their control points. + */ + const SkRect& getBounds() const { + if (fBoundsIsDirty) { + this->computeBounds(); + } + return fBounds; + } + + SkRRect getRRect() const; + + /** + * Transforms a path ref by a matrix, allocating a new one only if necessary. + */ + static void CreateTransformedCopy(sk_sp* dst, + const SkPathRef& src, + const SkMatrix& matrix); + + // static SkPathRef* CreateFromBuffer(SkRBuffer* buffer); + + /** + * Rollsback a path ref to zero verbs and points with the assumption that the path ref will be + * repopulated with approximately the same number of verbs and points. A new path ref is created + * only if necessary. + */ + static void Rewind(sk_sp* pathRef); + + ~SkPathRef(); + int countPoints() const { return fPoints.size(); } + int countVerbs() const { return fVerbs.size(); } + int countWeights() const { return fConicWeights.size(); } + + size_t approximateBytesUsed() const; + + /** + * Returns a pointer one beyond the first logical verb (last verb in memory order). + */ + const uint8_t* verbsBegin() const { return fVerbs.begin(); } + + /** + * Returns a const pointer to the first verb in memory (which is the last logical verb). + */ + const uint8_t* verbsEnd() const { return fVerbs.end(); } + + /** + * Returns a const pointer to the first point. + */ + const SkPoint* points() const { return fPoints.begin(); } + + /** + * Shortcut for this->points() + this->countPoints() + */ + const SkPoint* pointsEnd() const { return this->points() + this->countPoints(); } + + const SkScalar* conicWeights() const { return fConicWeights.begin(); } + const SkScalar* conicWeightsEnd() const { return fConicWeights.end(); } + + /** + * Convenience methods for getting to a verb or point by index. + */ + uint8_t atVerb(int index) const { return fVerbs[index]; } + const SkPoint& atPoint(int index) const { return fPoints[index]; } + + bool operator== (const SkPathRef& ref) const; + + void interpolate(const SkPathRef& ending, SkScalar weight, SkPathRef* out) const; + + /** + * Gets an ID that uniquely identifies the contents of the path ref. If two path refs have the + * same ID then they have the same verbs and points. However, two path refs may have the same + * contents but different genIDs. + * skbug.com/1762 for background on why fillType is necessary (for now). + */ + uint32_t genID(uint8_t fillType) const; + + void addGenIDChangeListener(sk_sp); // Threadsafe. + int genIDChangeListenerCount(); // Threadsafe + + bool dataMatchesVerbs() const; + bool isValid() const; + SkDEBUGCODE(void validate() const { SkASSERT(this->isValid()); } ) + + /** + * Resets this SkPathRef to a clean state. + */ + void reset(); + + bool isInitialEmptyPathRef() const { + return fGenerationID == kEmptyGenID; + } + +private: + enum SerializationOffsets { + kLegacyRRectOrOvalStartIdx_SerializationShift = 28, // requires 3 bits, ignored. + kLegacyRRectOrOvalIsCCW_SerializationShift = 27, // requires 1 bit, ignored. + kLegacyIsRRect_SerializationShift = 26, // requires 1 bit, ignored. + kIsFinite_SerializationShift = 25, // requires 1 bit + kLegacyIsOval_SerializationShift = 24, // requires 1 bit, ignored. + kSegmentMask_SerializationShift = 0 // requires 4 bits (deprecated) + }; + + SkPathRef(int numVerbs = 0, int numPoints = 0) { + fBoundsIsDirty = true; // this also invalidates fIsFinite + fGenerationID = kEmptyGenID; + fSegmentMask = 0; + fIsOval = false; + fIsRRect = false; + // The next two values don't matter unless fIsOval or fIsRRect are true. + fRRectOrOvalIsCCW = false; + fRRectOrOvalStartIdx = 0xAC; + if (numPoints > 0) + fPoints.reserve_back(numPoints); + if (numVerbs > 0) + fVerbs.reserve_back(numVerbs); + SkDEBUGCODE(fEditorsAttached.store(0);) + SkDEBUGCODE(this->validate();) + } + + void copy(const SkPathRef& ref, int additionalReserveVerbs, int additionalReservePoints); + + // Return true if the computed bounds are finite. + static bool ComputePtBounds(SkRect* bounds, const SkPathRef& ref) { + return bounds->setBoundsCheck(ref.points(), ref.countPoints()); + } + + // called, if dirty, by getBounds() + void computeBounds() const { + SkDEBUGCODE(this->validate();) + // TODO(mtklein): remove fBoundsIsDirty and fIsFinite, + // using an inverted rect instead of fBoundsIsDirty and always recalculating fIsFinite. + SkASSERT(fBoundsIsDirty); + + fIsFinite = ComputePtBounds(&fBounds, *this); + fBoundsIsDirty = false; + } + + void setBounds(const SkRect& rect) { + SkASSERT(rect.fLeft <= rect.fRight && rect.fTop <= rect.fBottom); + fBounds = rect; + fBoundsIsDirty = false; + fIsFinite = fBounds.isFinite(); + } + + /** Makes additional room but does not change the counts or change the genID */ + void incReserve(int additionalVerbs, int additionalPoints) { + SkDEBUGCODE(this->validate();) + // Use reserve() so that if there is not enough space, the array will grow with some + // additional space. This ensures repeated calls to grow won't always allocate. + if (additionalPoints > 0) + fPoints.reserve(fPoints.size() + additionalPoints); + if (additionalVerbs > 0) + fVerbs.reserve(fVerbs.size() + additionalVerbs); + SkDEBUGCODE(this->validate();) + } + + /** + * Resets all state except that of the verbs, points, and conic-weights. + * Intended to be called from other functions that reset state. + */ + void commonReset() { + SkDEBUGCODE(this->validate();) + this->callGenIDChangeListeners(); + fBoundsIsDirty = true; // this also invalidates fIsFinite + fGenerationID = 0; + + fSegmentMask = 0; + fIsOval = false; + fIsRRect = false; + } + + /** Resets the path ref with verbCount verbs and pointCount points, all uninitialized. Also + * allocates space for reserveVerb additional verbs and reservePoints additional points.*/ + void resetToSize(int verbCount, int pointCount, int conicCount, + int reserveVerbs = 0, int reservePoints = 0) { + commonReset(); + // Use reserve_back() so the arrays are sized to exactly fit the data. + const int pointDelta = pointCount + reservePoints - fPoints.size(); + if (pointDelta > 0) { + fPoints.reserve_back(pointDelta); + } + fPoints.resize_back(pointCount); + const int verbDelta = verbCount + reserveVerbs - fVerbs.size(); + if (verbDelta > 0) { + fVerbs.reserve_back(verbDelta); + } + fVerbs.resize_back(verbCount); + fConicWeights.resize_back(conicCount); + SkDEBUGCODE(this->validate();) + } + + /** + * Increases the verb count by numVbs and point count by the required amount. + * The new points are uninitialized. All the new verbs are set to the specified + * verb. If 'verb' is kConic_Verb, 'weights' will return a pointer to the + * uninitialized conic weights. + */ + SkPoint* growForRepeatedVerb(int /*SkPath::Verb*/ verb, int numVbs, SkScalar** weights); + + /** + * Increases the verb count 1, records the new verb, and creates room for the requisite number + * of additional points. A pointer to the first point is returned. Any new points are + * uninitialized. + */ + SkPoint* growForVerb(int /*SkPath::Verb*/ verb, SkScalar weight); + + /** + * Concatenates all verbs from 'path' onto our own verbs array. Increases the point count by the + * number of points in 'path', and the conic weight count by the number of conics in 'path'. + * + * Returns pointers to the uninitialized points and conic weights data. + */ + std::tuple growForVerbsInPath(const SkPathRef& path); + + /** + * Private, non-const-ptr version of the public function verbsMemBegin(). + */ + uint8_t* verbsBeginWritable() { return fVerbs.begin(); } + + /** + * Called the first time someone calls CreateEmpty to actually create the singleton. + */ + friend SkPathRef* sk_create_empty_pathref(); + + void setIsOval(bool isOval, bool isCCW, unsigned start) { + fIsOval = isOval; + fRRectOrOvalIsCCW = isCCW; + fRRectOrOvalStartIdx = SkToU8(start); + } + + void setIsRRect(bool isRRect, bool isCCW, unsigned start) { + fIsRRect = isRRect; + fRRectOrOvalIsCCW = isCCW; + fRRectOrOvalStartIdx = SkToU8(start); + } + + // called only by the editor. Note that this is not a const function. + SkPoint* getWritablePoints() { + SkDEBUGCODE(this->validate();) + fIsOval = false; + fIsRRect = false; + return fPoints.begin(); + } + + const SkPoint* getPoints() const { + SkDEBUGCODE(this->validate();) + return fPoints.begin(); + } + + void callGenIDChangeListeners(); + + enum { + kMinSize = 256, + }; + + mutable SkRect fBounds; + + PointsArray fPoints; + VerbsArray fVerbs; + ConicWeightsArray fConicWeights; + + enum { + kEmptyGenID = 1, // GenID reserved for path ref with zero points and zero verbs. + }; + mutable uint32_t fGenerationID; + SkDEBUGCODE(std::atomic fEditorsAttached;) // assert only one editor in use at any time. + + SkIDChangeListener::List fGenIDChangeListeners; + + mutable uint8_t fBoundsIsDirty; + mutable bool fIsFinite; // only meaningful if bounds are valid + + bool fIsOval; + bool fIsRRect; + // Both the circle and rrect special cases have a notion of direction and starting point + // The next two variables store that information for either. + bool fRRectOrOvalIsCCW; + uint8_t fRRectOrOvalStartIdx; + uint8_t fSegmentMask; + + friend class PathRefTest_Private; + friend class ForceIsRRect_Private; // unit test isRRect + friend class SkPath; + friend class SkPathBuilder; + friend class SkPathPriv; +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkSLDefines.h b/gfx/skia/skia/include/private/SkSLDefines.h new file mode 100644 index 0000000000..a258054229 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLDefines.h @@ -0,0 +1,64 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DEFINES +#define SKSL_DEFINES + +#include + +#include "include/core/SkTypes.h" +#include "include/private/base/SkTArray.h" + +using SKSL_INT = int64_t; +using SKSL_FLOAT = float; + +namespace SkSL { + +class Expression; +class Statement; + +using ComponentArray = SkSTArray<4, int8_t>; // for Swizzles + +class ExpressionArray : public SkSTArray<2, std::unique_ptr> { +public: + using SkSTArray::SkSTArray; + + /** Returns a new ExpressionArray containing a clone of every element. */ + ExpressionArray clone() const; +}; + +using StatementArray = SkSTArray<2, std::unique_ptr>; + +// Functions larger than this (measured in IR nodes) will not be inlined. This growth factor +// accounts for the number of calls being inlined--i.e., a function called five times (that is, with +// five inlining opportunities) would be considered 5x larger than if it were called once. This +// default threshold value is arbitrary, but tends to work well in practice. +static constexpr int kDefaultInlineThreshold = 50; + +// A hard upper limit on the number of variable slots allowed in a function/global scope. +// This is an arbitrary limit, but is needed to prevent code generation from taking unbounded +// amounts of time or space. +static constexpr int kVariableSlotLimit = 100000; + +// The SwizzleComponent namespace is used both by the SkSL::Swizzle expression, and the DSL swizzle. +// This namespace is injected into SkSL::dsl so that `using namespace SkSL::dsl` enables DSL code +// like `Swizzle(var, X, Y, ONE)` to compile without any extra qualifications. +namespace SwizzleComponent { + +enum Type : int8_t { + X = 0, Y = 1, Z = 2, W = 3, + R = 4, G = 5, B = 6, A = 7, + S = 8, T = 9, P = 10, Q = 11, + UL = 12, UT = 13, UR = 14, UB = 15, + ZERO, + ONE +}; + +} // namespace SwizzleComponent +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkSLIRNode.h b/gfx/skia/skia/include/private/SkSLIRNode.h new file mode 100644 index 0000000000..8fb4279b76 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLIRNode.h @@ -0,0 +1,145 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_IRNODE +#define SKSL_IRNODE + +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLPool.h" + +#include + +namespace SkSL { + +// The fKind field of IRNode could contain any of these values. +enum class ProgramElementKind { + kExtension = 0, + kFunction, + kFunctionPrototype, + kGlobalVar, + kInterfaceBlock, + kModifiers, + kStructDefinition, + + kFirst = kExtension, + kLast = kStructDefinition +}; + +enum class SymbolKind { + kExternal = (int) ProgramElementKind::kLast + 1, + kField, + kFunctionDeclaration, + kType, + kVariable, + + kFirst = kExternal, + kLast = kVariable +}; + +enum class StatementKind { + kBlock = (int) SymbolKind::kLast + 1, + kBreak, + kContinue, + kDiscard, + kDo, + kExpression, + kFor, + kIf, + kNop, + kReturn, + kSwitch, + kSwitchCase, + kVarDeclaration, + + kFirst = kBlock, + kLast = kVarDeclaration, +}; + +enum class ExpressionKind { + kBinary = (int) StatementKind::kLast + 1, + kChildCall, + kConstructorArray, + kConstructorArrayCast, + kConstructorCompound, + kConstructorCompoundCast, + kConstructorDiagonalMatrix, + kConstructorMatrixResize, + kConstructorScalarCast, + kConstructorSplat, + kConstructorStruct, + kFieldAccess, + kFunctionReference, + kFunctionCall, + kIndex, + kLiteral, + kMethodReference, + kPoison, + kPostfix, + kPrefix, + kSetting, + kSwizzle, + kTernary, + kTypeReference, + kVariableReference, + + kFirst = kBinary, + kLast = kVariableReference +}; + +/** + * Represents a node in the intermediate representation (IR) tree. The IR is a fully-resolved + * version of the program (all types determined, everything validated), ready for code generation. + */ +class IRNode : public Poolable { +public: + virtual ~IRNode() {} + + virtual std::string description() const = 0; + + // No copy construction or assignment + IRNode(const IRNode&) = delete; + IRNode& operator=(const IRNode&) = delete; + + // position of this element within the program being compiled, for error reporting purposes + Position fPosition; + + /** + * Use is to check the type of an IRNode. + * e.g. replace `s.kind() == Statement::Kind::kReturn` with `s.is()`. + */ + template + bool is() const { + return this->fKind == (int)T::kIRNodeKind; + } + + /** + * Use as to downcast IRNodes. + * e.g. replace `(ReturnStatement&) s` with `s.as()`. + */ + template + const T& as() const { + SkASSERT(this->is()); + return static_cast(*this); + } + + template + T& as() { + SkASSERT(this->is()); + return static_cast(*this); + } + +protected: + IRNode(Position position, int kind) + : fPosition(position) + , fKind(kind) {} + + int fKind; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkSLLayout.h b/gfx/skia/skia/include/private/SkSLLayout.h new file mode 100644 index 0000000000..a99f18a477 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLLayout.h @@ -0,0 +1,93 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_LAYOUT +#define SKSL_LAYOUT + +#include + +namespace SkSL { + +/** + * Represents a layout block appearing before a variable declaration, as in: + * + * layout (location = 0) int x; + */ +struct Layout { + enum Flag { + kOriginUpperLeft_Flag = 1 << 0, + kPushConstant_Flag = 1 << 1, + kBlendSupportAllEquations_Flag = 1 << 2, + kColor_Flag = 1 << 3, + + // These flags indicate if the qualifier appeared, regardless of the accompanying value. + kLocation_Flag = 1 << 4, + kOffset_Flag = 1 << 5, + kBinding_Flag = 1 << 6, + kTexture_Flag = 1 << 7, + kSampler_Flag = 1 << 8, + kIndex_Flag = 1 << 9, + kSet_Flag = 1 << 10, + kBuiltin_Flag = 1 << 11, + kInputAttachmentIndex_Flag = 1 << 12, + + // These flags indicate the backend type; only one at most can be set. + kSPIRV_Flag = 1 << 13, + kMetal_Flag = 1 << 14, + kGL_Flag = 1 << 15, + kWGSL_Flag = 1 << 16, + }; + + static constexpr int kAllBackendFlagsMask = + Layout::kSPIRV_Flag | Layout::kMetal_Flag | Layout::kGL_Flag | Layout::kWGSL_Flag; + + Layout(int flags, int location, int offset, int binding, int index, int set, int builtin, + int inputAttachmentIndex) + : fFlags(flags) + , fLocation(location) + , fOffset(offset) + , fBinding(binding) + , fIndex(index) + , fSet(set) + , fBuiltin(builtin) + , fInputAttachmentIndex(inputAttachmentIndex) {} + + Layout() = default; + + static Layout builtin(int builtin) { + Layout result; + result.fBuiltin = builtin; + return result; + } + + std::string description() const; + + bool operator==(const Layout& other) const; + + bool operator!=(const Layout& other) const { + return !(*this == other); + } + + int fFlags = 0; + int fLocation = -1; + int fOffset = -1; + int fBinding = -1; + int fTexture = -1; + int fSampler = -1; + int fIndex = -1; + int fSet = -1; + // builtin comes from SPIR-V and identifies which particular builtin value this object + // represents. + int fBuiltin = -1; + // input_attachment_index comes from Vulkan/SPIR-V to connect a shader variable to the a + // corresponding attachment on the subpass in which the shader is being used. + int fInputAttachmentIndex = -1; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkSLModifiers.h b/gfx/skia/skia/include/private/SkSLModifiers.h new file mode 100644 index 0000000000..7e8efddf19 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLModifiers.h @@ -0,0 +1,178 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_MODIFIERS +#define SKSL_MODIFIERS + +#include "include/private/SkSLLayout.h" + +#include +#include +#include + +namespace SkSL { + +class Context; +class Position; + +/** + * A set of modifier keywords (in, out, uniform, etc.) appearing before a declaration. + */ +struct Modifiers { + /** + * OpenGL requires modifiers to be in a strict order: + * - invariant-qualifier: (invariant) + * - interpolation-qualifier: flat, noperspective, (smooth) + * - storage-qualifier: const, uniform + * - parameter-qualifier: in, out, inout + * - precision-qualifier: highp, mediump, lowp + * + * SkSL does not have `invariant` or `smooth`. + */ + + enum Flag { + kNo_Flag = 0, + // Real GLSL modifiers + kFlat_Flag = 1 << 0, + kNoPerspective_Flag = 1 << 1, + kConst_Flag = 1 << 2, + kUniform_Flag = 1 << 3, + kIn_Flag = 1 << 4, + kOut_Flag = 1 << 5, + kHighp_Flag = 1 << 6, + kMediump_Flag = 1 << 7, + kLowp_Flag = 1 << 8, + kReadOnly_Flag = 1 << 9, + kWriteOnly_Flag = 1 << 10, + kBuffer_Flag = 1 << 11, + // Corresponds to the GLSL 'shared' modifier. Only allowed in a compute program. + kWorkgroup_Flag = 1 << 12, + // SkSL extensions, not present in GLSL + kExport_Flag = 1 << 13, + kES3_Flag = 1 << 14, + kPure_Flag = 1 << 15, + kInline_Flag = 1 << 16, + kNoInline_Flag = 1 << 17, + }; + + Modifiers() + : fLayout(Layout()) + , fFlags(0) {} + + Modifiers(const Layout& layout, int flags) + : fLayout(layout) + , fFlags(flags) {} + + std::string description() const { + return fLayout.description() + DescribeFlags(fFlags) + " "; + } + + static std::string DescribeFlags(int flags) { + // SkSL extensions + std::string result; + if (flags & kExport_Flag) { + result += "$export "; + } + if (flags & kES3_Flag) { + result += "$es3 "; + } + if (flags & kPure_Flag) { + result += "$pure "; + } + if (flags & kInline_Flag) { + result += "inline "; + } + if (flags & kNoInline_Flag) { + result += "noinline "; + } + + // Real GLSL qualifiers (must be specified in order in GLSL 4.1 and below) + if (flags & kFlat_Flag) { + result += "flat "; + } + if (flags & kNoPerspective_Flag) { + result += "noperspective "; + } + if (flags & kConst_Flag) { + result += "const "; + } + if (flags & kUniform_Flag) { + result += "uniform "; + } + if ((flags & kIn_Flag) && (flags & kOut_Flag)) { + result += "inout "; + } else if (flags & kIn_Flag) { + result += "in "; + } else if (flags & kOut_Flag) { + result += "out "; + } + if (flags & kHighp_Flag) { + result += "highp "; + } + if (flags & kMediump_Flag) { + result += "mediump "; + } + if (flags & kLowp_Flag) { + result += "lowp "; + } + if (flags & kReadOnly_Flag) { + result += "readonly "; + } + if (flags & kWriteOnly_Flag) { + result += "writeonly "; + } + if (flags & kBuffer_Flag) { + result += "buffer "; + } + + // We're using a non-GLSL name for this one; the GLSL equivalent is "shared" + if (flags & kWorkgroup_Flag) { + result += "workgroup "; + } + + if (!result.empty()) { + result.pop_back(); + } + return result; + } + + bool operator==(const Modifiers& other) const { + return fLayout == other.fLayout && fFlags == other.fFlags; + } + + bool operator!=(const Modifiers& other) const { + return !(*this == other); + } + + /** + * Verifies that only permitted modifiers and layout flags are included. Reports errors and + * returns false in the event of a violation. + */ + bool checkPermitted(const Context& context, + Position pos, + int permittedModifierFlags, + int permittedLayoutFlags) const; + + Layout fLayout; + int fFlags; +}; + +} // namespace SkSL + +namespace std { + +template <> +struct hash { + size_t operator()(const SkSL::Modifiers& key) const { + return (size_t) key.fFlags ^ ((size_t) key.fLayout.fFlags << 8) ^ + ((size_t) key.fLayout.fBuiltin << 16); + } +}; + +} // namespace std + +#endif diff --git a/gfx/skia/skia/include/private/SkSLProgramElement.h b/gfx/skia/skia/include/private/SkSLProgramElement.h new file mode 100644 index 0000000000..34d57bcdf8 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLProgramElement.h @@ -0,0 +1,41 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_PROGRAMELEMENT +#define SKSL_PROGRAMELEMENT + +#include "include/private/SkSLIRNode.h" + +#include + +namespace SkSL { + +/** + * Represents a top-level element (e.g. function or global variable) in a program. + */ +class ProgramElement : public IRNode { +public: + using Kind = ProgramElementKind; + + ProgramElement(Position pos, Kind kind) + : INHERITED(pos, (int) kind) { + SkASSERT(kind >= Kind::kFirst && kind <= Kind::kLast); + } + + Kind kind() const { + return (Kind) fKind; + } + + virtual std::unique_ptr clone() const = 0; + +private: + using INHERITED = IRNode; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkSLProgramKind.h b/gfx/skia/skia/include/private/SkSLProgramKind.h new file mode 100644 index 0000000000..f2355bd7d8 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLProgramKind.h @@ -0,0 +1,36 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLProgramKind_DEFINED +#define SkSLProgramKind_DEFINED + +#include + +namespace SkSL { + +/** + * SkSL supports several different program kinds. + */ +enum class ProgramKind : int8_t { + kFragment, + kVertex, + kCompute, + kGraphiteFragment, + kGraphiteVertex, + kRuntimeColorFilter, // Runtime effect only suitable as SkColorFilter + kRuntimeShader, // " " " " " SkShader + kRuntimeBlender, // " " " " " SkBlender + kPrivateRuntimeColorFilter, // Runtime color filter with public restrictions lifted + kPrivateRuntimeShader, // Runtime shader " " " " + kPrivateRuntimeBlender, // Runtime blender " " " " + kMeshVertex, // Vertex portion of a custom mesh + kMeshFragment, // Fragment " " " " " +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkSLSampleUsage.h b/gfx/skia/skia/include/private/SkSLSampleUsage.h new file mode 100644 index 0000000000..39d9e25818 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLSampleUsage.h @@ -0,0 +1,85 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLSampleUsage_DEFINED +#define SkSLSampleUsage_DEFINED + +#include "include/core/SkTypes.h" + +namespace SkSL { + +/** + * Represents all of the ways that a fragment processor is sampled by its parent. + */ +class SampleUsage { +public: + enum class Kind { + // Child is never sampled + kNone, + // Child is only sampled at the same coordinates as the parent + kPassThrough, + // Child is sampled with a matrix whose value is uniform + kUniformMatrix, + // Child is sampled with sk_FragCoord.xy + kFragCoord, + // Child is sampled using explicit coordinates + kExplicit, + }; + + // Make a SampleUsage that corresponds to no sampling of the child at all + SampleUsage() = default; + + SampleUsage(Kind kind, bool hasPerspective) : fKind(kind), fHasPerspective(hasPerspective) { + if (kind != Kind::kUniformMatrix) { + SkASSERT(!fHasPerspective); + } + } + + // Child is sampled with a matrix whose value is uniform. The name is fixed. + static SampleUsage UniformMatrix(bool hasPerspective) { + return SampleUsage(Kind::kUniformMatrix, hasPerspective); + } + + static SampleUsage Explicit() { + return SampleUsage(Kind::kExplicit, false); + } + + static SampleUsage PassThrough() { + return SampleUsage(Kind::kPassThrough, false); + } + + static SampleUsage FragCoord() { return SampleUsage(Kind::kFragCoord, false); } + + bool operator==(const SampleUsage& that) const { + return fKind == that.fKind && fHasPerspective == that.fHasPerspective; + } + + bool operator!=(const SampleUsage& that) const { return !(*this == that); } + + // Arbitrary name used by all uniform sampling matrices + static const char* MatrixUniformName() { return "matrix"; } + + SampleUsage merge(const SampleUsage& other); + + Kind kind() const { return fKind; } + + bool hasPerspective() const { return fHasPerspective; } + + bool isSampled() const { return fKind != Kind::kNone; } + bool isPassThrough() const { return fKind == Kind::kPassThrough; } + bool isExplicit() const { return fKind == Kind::kExplicit; } + bool isUniformMatrix() const { return fKind == Kind::kUniformMatrix; } + bool isFragCoord() const { return fKind == Kind::kFragCoord; } + +private: + Kind fKind = Kind::kNone; + bool fHasPerspective = false; // Only valid if fKind is kUniformMatrix +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkSLStatement.h b/gfx/skia/skia/include/private/SkSLStatement.h new file mode 100644 index 0000000000..3e5f084c75 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLStatement.h @@ -0,0 +1,44 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_STATEMENT +#define SKSL_STATEMENT + +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLSymbol.h" + +namespace SkSL { + +/** + * Abstract supertype of all statements. + */ +class Statement : public IRNode { +public: + using Kind = StatementKind; + + Statement(Position pos, Kind kind) + : INHERITED(pos, (int) kind) { + SkASSERT(kind >= Kind::kFirst && kind <= Kind::kLast); + } + + Kind kind() const { + return (Kind) fKind; + } + + virtual bool isEmpty() const { + return false; + } + + virtual std::unique_ptr clone() const = 0; + +private: + using INHERITED = IRNode; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkSLString.h b/gfx/skia/skia/include/private/SkSLString.h new file mode 100644 index 0000000000..f8f3768ca8 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLString.h @@ -0,0 +1,59 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_STRING +#define SKSL_STRING + +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" + +#include +#include +#include + +namespace SkSL { + +bool stod(std::string_view s, SKSL_FLOAT* value); +bool stoi(std::string_view s, SKSL_INT* value); + +namespace String { + +std::string printf(const char* fmt, ...) SK_PRINTF_LIKE(1, 2); +void appendf(std::string* str, const char* fmt, ...) SK_PRINTF_LIKE(2, 3); +void vappendf(std::string* str, const char* fmt, va_list va) SK_PRINTF_LIKE(2, 0); + +inline auto Separator() { + // This returns a lambda which emits "" the first time it is called, and ", " every subsequent + // time it is called. + struct Output { + const std::string fSpace, fComma; + }; + static const Output* kOutput = new Output{{}, {", "}}; + + return [firstSeparator = true]() mutable -> const std::string& { + if (firstSeparator) { + firstSeparator = false; + return kOutput->fSpace; + } else { + return kOutput->fComma; + } + }; +} + +} // namespace String +} // namespace SkSL + +namespace skstd { + +// We use a custom to_string(float|double) which ignores locale settings and writes `1.0` instead +// of `1.00000`. +std::string to_string(float value); +std::string to_string(double value); + +} // namespace skstd + +#endif diff --git a/gfx/skia/skia/include/private/SkSLSymbol.h b/gfx/skia/skia/include/private/SkSLSymbol.h new file mode 100644 index 0000000000..a5b563c5c7 --- /dev/null +++ b/gfx/skia/skia/include/private/SkSLSymbol.h @@ -0,0 +1,63 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_SYMBOL +#define SKSL_SYMBOL + +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLProgramElement.h" + +namespace SkSL { + +class Type; + +/** + * Represents a symboltable entry. + */ +class Symbol : public IRNode { +public: + using Kind = SymbolKind; + + Symbol(Position pos, Kind kind, std::string_view name, const Type* type = nullptr) + : INHERITED(pos, (int) kind) + , fName(name) + , fType(type) { + SkASSERT(kind >= Kind::kFirst && kind <= Kind::kLast); + } + + ~Symbol() override {} + + const Type& type() const { + SkASSERT(fType); + return *fType; + } + + Kind kind() const { + return (Kind) fKind; + } + + std::string_view name() const { + return fName; + } + + /** + * Don't call this directly--use SymbolTable::renameSymbol instead! + */ + void setName(std::string_view newName) { + fName = newName; + } + +private: + std::string_view fName; + const Type* fType; + + using INHERITED = IRNode; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/private/SkShadowFlags.h b/gfx/skia/skia/include/private/SkShadowFlags.h new file mode 100644 index 0000000000..99ed6cb8a0 --- /dev/null +++ b/gfx/skia/skia/include/private/SkShadowFlags.h @@ -0,0 +1,27 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkShadowFlags_DEFINED +#define SkShadowFlags_DEFINED + +// A set of flags shared between the SkAmbientShadowMaskFilter and the SkSpotShadowMaskFilter +enum SkShadowFlags { + kNone_ShadowFlag = 0x00, + /** The occluding object is not opaque. Knowing that the occluder is opaque allows + * us to cull shadow geometry behind it and improve performance. */ + kTransparentOccluder_ShadowFlag = 0x01, + /** Don't try to use analytic shadows. */ + kGeometricOnly_ShadowFlag = 0x02, + /** Light position represents a direction, light radius is blur radius at elevation 1 */ + kDirectionalLight_ShadowFlag = 0x04, + /** Concave paths will only use blur to generate the shadow */ + kConcaveBlurOnly_ShadowFlag = 0x08, + /** mask for all shadow flags */ + kAll_ShadowFlag = 0x0F +}; + +#endif diff --git a/gfx/skia/skia/include/private/SkSpinlock.h b/gfx/skia/skia/include/private/SkSpinlock.h new file mode 100644 index 0000000000..3816dc9dff --- /dev/null +++ b/gfx/skia/skia/include/private/SkSpinlock.h @@ -0,0 +1,57 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSpinlock_DEFINED +#define SkSpinlock_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkThreadAnnotations.h" +#include + +class SK_CAPABILITY("mutex") SkSpinlock { +public: + constexpr SkSpinlock() = default; + + void acquire() SK_ACQUIRE() { + // To act as a mutex, we need an acquire barrier when we acquire the lock. + if (fLocked.exchange(true, std::memory_order_acquire)) { + // Lock was contended. Fall back to an out-of-line spin loop. + this->contendedAcquire(); + } + } + + // Acquire the lock or fail (quickly). Lets the caller decide to do something other than wait. + bool tryAcquire() SK_TRY_ACQUIRE(true) { + // To act as a mutex, we need an acquire barrier when we acquire the lock. + if (fLocked.exchange(true, std::memory_order_acquire)) { + // Lock was contended. Let the caller decide what to do. + return false; + } + return true; + } + + void release() SK_RELEASE_CAPABILITY() { + // To act as a mutex, we need a release barrier when we release the lock. + fLocked.store(false, std::memory_order_release); + } + +private: + SK_API void contendedAcquire(); + + std::atomic fLocked{false}; +}; + +class SK_SCOPED_CAPABILITY SkAutoSpinlock { +public: + SkAutoSpinlock(SkSpinlock& mutex) SK_ACQUIRE(mutex) : fSpinlock(mutex) { fSpinlock.acquire(); } + ~SkAutoSpinlock() SK_RELEASE_CAPABILITY() { fSpinlock.release(); } + +private: + SkSpinlock& fSpinlock; +}; + +#endif//SkSpinlock_DEFINED diff --git a/gfx/skia/skia/include/private/SkWeakRefCnt.h b/gfx/skia/skia/include/private/SkWeakRefCnt.h new file mode 100644 index 0000000000..058a18652b --- /dev/null +++ b/gfx/skia/skia/include/private/SkWeakRefCnt.h @@ -0,0 +1,173 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkWeakRefCnt_DEFINED +#define SkWeakRefCnt_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +#include +#include + +/** \class SkWeakRefCnt + + SkWeakRefCnt is the base class for objects that may be shared by multiple + objects. When an existing strong owner wants to share a reference, it calls + ref(). When a strong owner wants to release its reference, it calls + unref(). When the shared object's strong reference count goes to zero as + the result of an unref() call, its (virtual) weak_dispose method is called. + It is an error for the destructor to be called explicitly (or via the + object going out of scope on the stack or calling delete) if + getRefCnt() > 1. + + In addition to strong ownership, an owner may instead obtain a weak + reference by calling weak_ref(). A call to weak_ref() must be balanced by a + call to weak_unref(). To obtain a strong reference from a weak reference, + call try_ref(). If try_ref() returns true, the owner's pointer is now also + a strong reference on which unref() must be called. Note that this does not + affect the original weak reference, weak_unref() must still be called. When + the weak reference count goes to zero, the object is deleted. While the + weak reference count is positive and the strong reference count is zero the + object still exists, but will be in the disposed state. It is up to the + object to define what this means. + + Note that a strong reference implicitly implies a weak reference. As a + result, it is allowable for the owner of a strong ref to call try_ref(). + This will have the same effect as calling ref(), but may be more expensive. + + Example: + + SkWeakRefCnt myRef = strongRef.weak_ref(); + ... // strongRef.unref() may or may not be called + if (myRef.try_ref()) { + ... // use myRef + myRef.unref(); + } else { + // myRef is in the disposed state + } + myRef.weak_unref(); +*/ +class SK_API SkWeakRefCnt : public SkRefCnt { +public: + /** Default construct, initializing the reference counts to 1. + The strong references collectively hold one weak reference. When the + strong reference count goes to zero, the collectively held weak + reference is released. + */ + SkWeakRefCnt() : SkRefCnt(), fWeakCnt(1) {} + + /** Destruct, asserting that the weak reference count is 1. + */ + ~SkWeakRefCnt() override { +#ifdef SK_DEBUG + SkASSERT(getWeakCnt() == 1); + fWeakCnt.store(0, std::memory_order_relaxed); +#endif + } + +#ifdef SK_DEBUG + /** Return the weak reference count. */ + int32_t getWeakCnt() const { + return fWeakCnt.load(std::memory_order_relaxed); + } +#endif + +private: + /** If fRefCnt is 0, returns 0. + * Otherwise increments fRefCnt, acquires, and returns the old value. + */ + int32_t atomic_conditional_acquire_strong_ref() const { + int32_t prev = fRefCnt.load(std::memory_order_relaxed); + do { + if (0 == prev) { + break; + } + } while(!fRefCnt.compare_exchange_weak(prev, prev+1, std::memory_order_acquire, + std::memory_order_relaxed)); + return prev; + } + +public: + /** Creates a strong reference from a weak reference, if possible. The + caller must already be an owner. If try_ref() returns true the owner + is in posession of an additional strong reference. Both the original + reference and new reference must be properly unreferenced. If try_ref() + returns false, no strong reference could be created and the owner's + reference is in the same state as before the call. + */ + bool SK_WARN_UNUSED_RESULT try_ref() const { + if (atomic_conditional_acquire_strong_ref() != 0) { + // Acquire barrier (L/SL), if not provided above. + // Prevents subsequent code from happening before the increment. + return true; + } + return false; + } + + /** Increment the weak reference count. Must be balanced by a call to + weak_unref(). + */ + void weak_ref() const { + SkASSERT(getRefCnt() > 0); + SkASSERT(getWeakCnt() > 0); + // No barrier required. + (void)fWeakCnt.fetch_add(+1, std::memory_order_relaxed); + } + + /** Decrement the weak reference count. If the weak reference count is 1 + before the decrement, then call delete on the object. Note that if this + is the case, then the object needs to have been allocated via new, and + not on the stack. + */ + void weak_unref() const { + SkASSERT(getWeakCnt() > 0); + // A release here acts in place of all releases we "should" have been doing in ref(). + if (1 == fWeakCnt.fetch_add(-1, std::memory_order_acq_rel)) { + // Like try_ref(), the acquire is only needed on success, to make sure + // code in internal_dispose() doesn't happen before the decrement. +#ifdef SK_DEBUG + // so our destructor won't complain + fWeakCnt.store(1, std::memory_order_relaxed); +#endif + this->INHERITED::internal_dispose(); + } + } + + /** Returns true if there are no strong references to the object. When this + is the case all future calls to try_ref() will return false. + */ + bool weak_expired() const { + return fRefCnt.load(std::memory_order_relaxed) == 0; + } + +protected: + /** Called when the strong reference count goes to zero. This allows the + object to free any resources it may be holding. Weak references may + still exist and their level of allowed access to the object is defined + by the object's class. + */ + virtual void weak_dispose() const { + } + +private: + /** Called when the strong reference count goes to zero. Calls weak_dispose + on the object and releases the implicit weak reference held + collectively by the strong references. + */ + void internal_dispose() const override { + weak_dispose(); + weak_unref(); + } + + /* Invariant: fWeakCnt = #weak + (fRefCnt > 0 ? 1 : 0) */ + mutable std::atomic fWeakCnt; + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/private/base/README.md b/gfx/skia/skia/include/private/base/README.md new file mode 100644 index 0000000000..7f4f17b228 --- /dev/null +++ b/gfx/skia/skia/include/private/base/README.md @@ -0,0 +1,4 @@ +Files in "base" are used by many parts of Skia, but are not part of the public Skia API. +See also src/base for other files that are part of base, but not needed by the public API. + +Files here should not depend on anything other than system headers or other files in base. \ No newline at end of file diff --git a/gfx/skia/skia/include/private/base/SingleOwner.h b/gfx/skia/skia/include/private/base/SingleOwner.h new file mode 100644 index 0000000000..473981e1fb --- /dev/null +++ b/gfx/skia/skia/include/private/base/SingleOwner.h @@ -0,0 +1,75 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_SingleOwner_DEFINED +#define skgpu_SingleOwner_DEFINED + +#include "include/private/base/SkDebug.h" // IWYU pragma: keep + +#if defined(SK_DEBUG) +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkThreadAnnotations.h" +#include "include/private/base/SkThreadID.h" + +#endif + +namespace skgpu { + +#if defined(SK_DEBUG) + +#define SKGPU_ASSERT_SINGLE_OWNER(obj) \ + skgpu::SingleOwner::AutoEnforce debug_SingleOwner(obj, __FILE__, __LINE__); + +// This is a debug tool to verify an object is only being used from one thread at a time. +class SingleOwner { +public: + SingleOwner() : fOwner(kIllegalThreadID), fReentranceCount(0) {} + + struct AutoEnforce { + AutoEnforce(SingleOwner* so, const char* file, int line) + : fFile(file), fLine(line), fSO(so) { + fSO->enter(file, line); + } + ~AutoEnforce() { fSO->exit(fFile, fLine); } + + const char* fFile; + int fLine; + SingleOwner* fSO; + }; + +private: + void enter(const char* file, int line) { + SkAutoMutexExclusive lock(fMutex); + SkThreadID self = SkGetThreadID(); + SkASSERTF(fOwner == self || fOwner == kIllegalThreadID, "%s:%d Single owner failure.", + file, line); + fReentranceCount++; + fOwner = self; + } + + void exit(const char* file, int line) { + SkAutoMutexExclusive lock(fMutex); + SkASSERTF(fOwner == SkGetThreadID(), "%s:%d Single owner failure.", file, line); + fReentranceCount--; + if (fReentranceCount == 0) { + fOwner = kIllegalThreadID; + } + } + + SkMutex fMutex; + SkThreadID fOwner SK_GUARDED_BY(fMutex); + int fReentranceCount SK_GUARDED_BY(fMutex); +}; +#else +#define SKGPU_ASSERT_SINGLE_OWNER(obj) +class SingleOwner {}; // Provide a no-op implementation so we can pass pointers to constructors +#endif + +} // namespace skgpu + +#endif diff --git a/gfx/skia/skia/include/private/base/SkAPI.h b/gfx/skia/skia/include/private/base/SkAPI.h new file mode 100644 index 0000000000..4028f95d87 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkAPI.h @@ -0,0 +1,52 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAPI_DEFINED +#define SkAPI_DEFINED + +#include "include/private/base/SkLoadUserConfig.h" // IWYU pragma: keep + +// If SKIA_IMPLEMENTATION is defined as 1, that signals we are building Skia and should +// export our symbols. If it is not set (or set to 0), then Skia is being used by a client +// and we should not export our symbols. +#if !defined(SKIA_IMPLEMENTATION) + #define SKIA_IMPLEMENTATION 0 +#endif + +// If we are compiling Skia is being as a DLL, we need to be sure to export all of our public +// APIs to that DLL. If a client is using Skia which was compiled as a DLL, we need to instruct +// the linker to use the symbols from that DLL. This is the goal of the SK_API define. +#if !defined(SK_API) + #if defined(SKIA_DLL) + #if defined(_MSC_VER) + #if SKIA_IMPLEMENTATION + #define SK_API __declspec(dllexport) + #else + #define SK_API __declspec(dllimport) + #endif + #else + #define SK_API __attribute__((visibility("default"))) + #endif + #else + #define SK_API + #endif +#endif + +// SK_SPI is functionally identical to SK_API, but used within src to clarify that it's less stable +#if !defined(SK_SPI) + #define SK_SPI SK_API +#endif + +// See https://clang.llvm.org/docs/AttributeReference.html#availability +// The API_AVAILABLE macro comes from on MacOS +#if defined(SK_ENABLE_API_AVAILABLE) +# define SK_API_AVAILABLE API_AVAILABLE +#else +# define SK_API_AVAILABLE(...) +#endif + +#endif diff --git a/gfx/skia/skia/include/private/base/SkAlign.h b/gfx/skia/skia/include/private/base/SkAlign.h new file mode 100644 index 0000000000..2b2138ddd4 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkAlign.h @@ -0,0 +1,39 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAlign_DEFINED +#define SkAlign_DEFINED + +#include "include/private/base/SkAssert.h" + +#include + +template static constexpr T SkAlign2(T x) { return (x + 1) >> 1 << 1; } +template static constexpr T SkAlign4(T x) { return (x + 3) >> 2 << 2; } +template static constexpr T SkAlign8(T x) { return (x + 7) >> 3 << 3; } + +template static constexpr bool SkIsAlign2(T x) { return 0 == (x & 1); } +template static constexpr bool SkIsAlign4(T x) { return 0 == (x & 3); } +template static constexpr bool SkIsAlign8(T x) { return 0 == (x & 7); } + +template static constexpr T SkAlignPtr(T x) { + return sizeof(void*) == 8 ? SkAlign8(x) : SkAlign4(x); +} +template static constexpr bool SkIsAlignPtr(T x) { + return sizeof(void*) == 8 ? SkIsAlign8(x) : SkIsAlign4(x); +} + +/** + * align up to a power of 2 + */ +static inline constexpr size_t SkAlignTo(size_t x, size_t alignment) { + // The same as alignment && SkIsPow2(value), w/o a dependency cycle. + SkASSERT(alignment && (alignment & (alignment - 1)) == 0); + return (x + alignment - 1) & ~(alignment - 1); +} + +#endif diff --git a/gfx/skia/skia/include/private/base/SkAlignedStorage.h b/gfx/skia/skia/include/private/base/SkAlignedStorage.h new file mode 100644 index 0000000000..532ad03978 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkAlignedStorage.h @@ -0,0 +1,32 @@ +// Copyright 2022 Google LLC +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#ifndef SkAlignedStorage_DEFINED +#define SkAlignedStorage_DEFINED + +#include +#include + +template class SkAlignedSTStorage { +public: + SkAlignedSTStorage() {} + SkAlignedSTStorage(SkAlignedSTStorage&&) = delete; + SkAlignedSTStorage(const SkAlignedSTStorage&) = delete; + SkAlignedSTStorage& operator=(SkAlignedSTStorage&&) = delete; + SkAlignedSTStorage& operator=(const SkAlignedSTStorage&) = delete; + + // Returns void* because this object does not initialize the + // memory. Use placement new for types that require a constructor. + void* get() { return fStorage; } + const void* get() const { return fStorage; } + + // Act as a container of bytes because the storage is uninitialized. + std::byte* data() { return fStorage; } + const std::byte* data() const { return fStorage; } + size_t size() const { return std::size(fStorage); } + +private: + alignas(T) std::byte fStorage[sizeof(T) * N]; +}; + +#endif // SkAlignedStorage_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkAssert.h b/gfx/skia/skia/include/private/base/SkAssert.h new file mode 100644 index 0000000000..053e25f22b --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkAssert.h @@ -0,0 +1,93 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAssert_DEFINED +#define SkAssert_DEFINED + +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkDebug.h" // IWYU pragma: keep + +/** Called internally if we hit an unrecoverable error. + The platform implementation must not return, but should either throw + an exception or otherwise exit. +*/ +[[noreturn]] SK_API extern void sk_abort_no_print(void); +SK_API extern bool sk_abort_is_enabled(); + +#if defined(SK_BUILD_FOR_GOOGLE3) + void SkDebugfForDumpStackTrace(const char* data, void* unused); + namespace base { + void DumpStackTrace(int skip_count, void w(const char*, void*), void* arg); + } +# define SK_DUMP_GOOGLE3_STACK() ::base::DumpStackTrace(0, SkDebugfForDumpStackTrace, nullptr) +#else +# define SK_DUMP_GOOGLE3_STACK() +#endif + +#if !defined(SK_ABORT) +# if defined(SK_BUILD_FOR_WIN) + // This style lets Visual Studio follow errors back to the source file. +# define SK_DUMP_LINE_FORMAT "%s(%d)" +# else +# define SK_DUMP_LINE_FORMAT "%s:%d" +# endif +# define SK_ABORT(message, ...) \ + do { if (sk_abort_is_enabled()) { \ + SkDebugf(SK_DUMP_LINE_FORMAT ": fatal error: \"" message "\"\n", \ + __FILE__, __LINE__, ##__VA_ARGS__); \ + SK_DUMP_GOOGLE3_STACK(); \ + sk_abort_no_print(); \ + } } while (false) +#endif + +// SkASSERT, SkASSERTF and SkASSERT_RELEASE can be used as stand alone assertion expressions, e.g. +// uint32_t foo(int x) { +// SkASSERT(x > 4); +// return x - 4; +// } +// and are also written to be compatible with constexpr functions: +// constexpr uint32_t foo(int x) { +// return SkASSERT(x > 4), +// x - 4; +// } +#define SkASSERT_RELEASE(cond) \ + static_cast( (cond) ? (void)0 : []{ SK_ABORT("assert(%s)", #cond); }() ) + +#if defined(SK_DEBUG) + #define SkASSERT(cond) SkASSERT_RELEASE(cond) + #define SkASSERTF(cond, fmt, ...) static_cast( (cond) ? (void)0 : [&]{ \ + SkDebugf(fmt"\n", ##__VA_ARGS__); \ + SK_ABORT("assert(%s)", #cond); \ + }() ) + #define SkDEBUGFAIL(message) SK_ABORT("%s", message) + #define SkDEBUGFAILF(fmt, ...) SK_ABORT(fmt, ##__VA_ARGS__) + #define SkAssertResult(cond) SkASSERT(cond) +#else + #define SkASSERT(cond) static_cast(0) + #define SkASSERTF(cond, fmt, ...) static_cast(0) + #define SkDEBUGFAIL(message) + #define SkDEBUGFAILF(fmt, ...) + + // unlike SkASSERT, this macro executes its condition in the non-debug build. + // The if is present so that this can be used with functions marked SK_WARN_UNUSED_RESULT. + #define SkAssertResult(cond) if (cond) {} do {} while(false) +#endif + +#if !defined(SkUNREACHABLE) +# if defined(_MSC_VER) && !defined(__clang__) +# include +# define FAST_FAIL_INVALID_ARG 5 +// See https://developercommunity.visualstudio.com/content/problem/1128631/code-flow-doesnt-see-noreturn-with-extern-c.html +// for why this is wrapped. Hopefully removable after msvc++ 19.27 is no longer supported. +[[noreturn]] static inline void sk_fast_fail() { __fastfail(FAST_FAIL_INVALID_ARG); } +# define SkUNREACHABLE sk_fast_fail() +# else +# define SkUNREACHABLE __builtin_trap() +# endif +#endif + +#endif diff --git a/gfx/skia/skia/include/private/base/SkAttributes.h b/gfx/skia/skia/include/private/base/SkAttributes.h new file mode 100644 index 0000000000..038a800e97 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkAttributes.h @@ -0,0 +1,89 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAttributes_DEFINED +#define SkAttributes_DEFINED + +#include "include/private/base/SkFeatures.h" // IWYU pragma: keep +#include "include/private/base/SkLoadUserConfig.h" // IWYU pragma: keep + +#if defined(__clang__) || defined(__GNUC__) +# define SK_ATTRIBUTE(attr) __attribute__((attr)) +#else +# define SK_ATTRIBUTE(attr) +#endif + +#if !defined(SK_UNUSED) +# if !defined(__clang__) && defined(_MSC_VER) +# define SK_UNUSED __pragma(warning(suppress:4189)) +# else +# define SK_UNUSED SK_ATTRIBUTE(unused) +# endif +#endif + +#if !defined(SK_WARN_UNUSED_RESULT) + #define SK_WARN_UNUSED_RESULT SK_ATTRIBUTE(warn_unused_result) +#endif + +/** + * If your judgment is better than the compiler's (i.e. you've profiled it), + * you can use SK_ALWAYS_INLINE to force inlining. E.g. + * inline void someMethod() { ... } // may not be inlined + * SK_ALWAYS_INLINE void someMethod() { ... } // should always be inlined + */ +#if !defined(SK_ALWAYS_INLINE) +# if defined(SK_BUILD_FOR_WIN) +# define SK_ALWAYS_INLINE __forceinline +# else +# define SK_ALWAYS_INLINE SK_ATTRIBUTE(always_inline) inline +# endif +#endif + +/** + * If your judgment is better than the compiler's (i.e. you've profiled it), + * you can use SK_NEVER_INLINE to prevent inlining. + */ +#if !defined(SK_NEVER_INLINE) +# if defined(SK_BUILD_FOR_WIN) +# define SK_NEVER_INLINE __declspec(noinline) +# else +# define SK_NEVER_INLINE SK_ATTRIBUTE(noinline) +# endif +#endif + +/** + * Used to annotate a function as taking printf style arguments. + * `A` is the (1 based) index of the format string argument. + * `B` is the (1 based) index of the first argument used by the format string. + */ +#if !defined(SK_PRINTF_LIKE) +# define SK_PRINTF_LIKE(A, B) SK_ATTRIBUTE(format(printf, (A), (B))) +#endif + +/** + * Used to ignore sanitizer warnings. + */ +#if !defined(SK_NO_SANITIZE) +# define SK_NO_SANITIZE(A) SK_ATTRIBUTE(no_sanitize(A)) +#endif + +/** + * Annotates a class' non-trivial special functions as trivial for the purposes of calls. + * Allows a class with a non-trivial destructor to be __is_trivially_relocatable. + * Use of this attribute on a public API breaks platform ABI. + * Annotated classes may not hold pointers derived from `this`. + * Annotated classes must implement move+delete as equivalent to memcpy+free. + * Use may require more complete types, as callee destroys. + * + * https://clang.llvm.org/docs/AttributeReference.html#trivial-abi + * https://libcxx.llvm.org/DesignDocs/UniquePtrTrivialAbi.html + */ +#if !defined(SK_TRIVIAL_ABI) +# define SK_TRIVIAL_ABI +#endif + +#endif diff --git a/gfx/skia/skia/include/private/base/SkCPUTypes.h b/gfx/skia/skia/include/private/base/SkCPUTypes.h new file mode 100644 index 0000000000..a5f60fd3ef --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkCPUTypes.h @@ -0,0 +1,25 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkCPUTypes_DEFINED +#define SkCPUTypes_DEFINED + +// TODO(bungeman,kjlubick) There are a lot of assumptions throughout the codebase that +// these types are 32 bits, when they could be more or less. Public APIs should stop +// using these. Internally, we could use uint_fast8_t and uint_fast16_t, but not in +// public APIs due to ABI incompatibilities. + +/** Fast type for unsigned 8 bits. Use for parameter passing and local + variables, not for storage +*/ +typedef unsigned U8CPU; + +/** Fast type for unsigned 16 bits. Use for parameter passing and local + variables, not for storage +*/ +typedef unsigned U16CPU; + +#endif diff --git a/gfx/skia/skia/include/private/base/SkContainers.h b/gfx/skia/skia/include/private/base/SkContainers.h new file mode 100644 index 0000000000..2ece73e287 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkContainers.h @@ -0,0 +1,46 @@ +// Copyright 2022 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#ifndef SkContainers_DEFINED +#define SkContainers_DEFINED + +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkSpan_impl.h" + +#include +#include + +class SK_SPI SkContainerAllocator { +public: + SkContainerAllocator(size_t sizeOfT, int maxCapacity) + : fSizeOfT{sizeOfT} + , fMaxCapacity{maxCapacity} {} + + // allocate will abort on failure. Given a capacity of 0, it will return the empty span. + // The bytes allocated are freed using sk_free(). + SkSpan allocate(int capacity, double growthFactor = 1.0); + +private: + friend struct SkContainerAllocatorTestingPeer; + // All capacity counts will be rounded up to kCapacityMultiple. + // TODO: this is a constant from the original SkTArray code. This should be checked some how. + static constexpr int64_t kCapacityMultiple = 8; + + // Rounds up capacity to next multiple of kCapacityMultiple and pin to fMaxCapacity. + size_t roundUpCapacity(int64_t capacity) const; + + // Grows the capacity by growthFactor being sure to stay with in kMinBytes and fMaxCapacity. + size_t growthFactorCapacity(int capacity, double growthFactor) const; + + const size_t fSizeOfT; + const int64_t fMaxCapacity; +}; + +// sk_allocate_canfail returns the empty span on failure. Parameter size must be > 0. +SkSpan sk_allocate_canfail(size_t size); + +// Returns the empty span if size is 0. sk_allocate_throw aborts on failure. +SkSpan sk_allocate_throw(size_t size); + +SK_SPI void sk_report_container_overflow_and_die(); +#endif // SkContainers_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkDebug.h b/gfx/skia/skia/include/private/base/SkDebug.h new file mode 100644 index 0000000000..2e4810fc1c --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkDebug.h @@ -0,0 +1,27 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDebug_DEFINED +#define SkDebug_DEFINED + +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkAttributes.h" +#include "include/private/base/SkLoadUserConfig.h" // IWYU pragma: keep + +#if !defined(SkDebugf) + void SK_SPI SkDebugf(const char format[], ...) SK_PRINTF_LIKE(1, 2); +#endif + +#if defined(SK_DEBUG) + #define SkDEBUGCODE(...) __VA_ARGS__ + #define SkDEBUGF(...) SkDebugf(__VA_ARGS__) +#else + #define SkDEBUGCODE(...) + #define SkDEBUGF(...) +#endif + +#endif diff --git a/gfx/skia/skia/include/private/base/SkDeque.h b/gfx/skia/skia/include/private/base/SkDeque.h new file mode 100644 index 0000000000..fbc6167313 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkDeque.h @@ -0,0 +1,143 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkDeque_DEFINED +#define SkDeque_DEFINED + +#include "include/private/base/SkAPI.h" + +#include + +/* + * The deque class works by blindly creating memory space of a specified element + * size. It manages the memory as a doubly linked list of blocks each of which + * can contain multiple elements. Pushes and pops add/remove blocks from the + * beginning/end of the list as necessary while each block tracks the used + * portion of its memory. + * One behavior to be aware of is that the pops do not immediately remove an + * empty block from the beginning/end of the list (Presumably so push/pop pairs + * on the block boundaries don't cause thrashing). This can result in the first/ + * last element not residing in the first/last block. + */ +class SK_API SkDeque { +public: + /** + * elemSize specifies the size of each individual element in the deque + * allocCount specifies how many elements are to be allocated as a block + */ + explicit SkDeque(size_t elemSize, int allocCount = 1); + SkDeque(size_t elemSize, void* storage, size_t storageSize, int allocCount = 1); + ~SkDeque(); + + bool empty() const { return 0 == fCount; } + int count() const { return fCount; } + size_t elemSize() const { return fElemSize; } + + const void* front() const { return fFront; } + const void* back() const { return fBack; } + + void* front() { + return (void*)((const SkDeque*)this)->front(); + } + + void* back() { + return (void*)((const SkDeque*)this)->back(); + } + + /** + * push_front and push_back return a pointer to the memory space + * for the new element + */ + void* push_front(); + void* push_back(); + + void pop_front(); + void pop_back(); + +private: + struct Block; + +public: + class Iter { + public: + enum IterStart { + kFront_IterStart, + kBack_IterStart, + }; + + /** + * Creates an uninitialized iterator. Must be reset() + */ + Iter(); + + Iter(const SkDeque& d, IterStart startLoc); + void* next(); + void* prev(); + + void reset(const SkDeque& d, IterStart startLoc); + + private: + SkDeque::Block* fCurBlock; + char* fPos; + size_t fElemSize; + }; + + // Inherit privately from Iter to prevent access to reverse iteration + class F2BIter : private Iter { + public: + F2BIter() {} + + /** + * Wrap Iter's 2 parameter ctor to force initialization to the + * beginning of the deque + */ + F2BIter(const SkDeque& d) : INHERITED(d, kFront_IterStart) {} + + using Iter::next; + + /** + * Wrap Iter::reset to force initialization to the beginning of the + * deque + */ + void reset(const SkDeque& d) { + this->INHERITED::reset(d, kFront_IterStart); + } + + private: + using INHERITED = Iter; + }; + +private: + // allow unit test to call numBlocksAllocated + friend class DequeUnitTestHelper; + + void* fFront; + void* fBack; + + Block* fFrontBlock; + Block* fBackBlock; + size_t fElemSize; + void* fInitialStorage; + int fCount; // number of elements in the deque + int fAllocCount; // number of elements to allocate per block + + Block* allocateBlock(int allocCount); + void freeBlock(Block* block); + + /** + * This returns the number of chunk blocks allocated by the deque. It + * can be used to gauge the effectiveness of the selected allocCount. + */ + int numBlocksAllocated() const; + + SkDeque(const SkDeque&) = delete; + SkDeque& operator=(const SkDeque&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/private/base/SkFeatures.h b/gfx/skia/skia/include/private/base/SkFeatures.h new file mode 100644 index 0000000000..662bf03211 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkFeatures.h @@ -0,0 +1,151 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFeatures_DEFINED +#define SkFeatures_DEFINED + +#if !defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_WIN) && \ + !defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_MAC) + + #ifdef __APPLE__ + #include + #endif + + #if defined(_WIN32) || defined(__SYMBIAN32__) + #define SK_BUILD_FOR_WIN + #elif defined(ANDROID) || defined(__ANDROID__) + #define SK_BUILD_FOR_ANDROID + #elif defined(linux) || defined(__linux) || defined(__FreeBSD__) || \ + defined(__OpenBSD__) || defined(__sun) || defined(__NetBSD__) || \ + defined(__DragonFly__) || defined(__Fuchsia__) || \ + defined(__GLIBC__) || defined(__GNU__) || defined(__unix__) + #define SK_BUILD_FOR_UNIX + #elif TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR + #define SK_BUILD_FOR_IOS + #else + #define SK_BUILD_FOR_MAC + #endif +#endif // end SK_BUILD_FOR_* + + +#if defined(SK_BUILD_FOR_WIN) && !defined(__clang__) + #if !defined(SK_RESTRICT) + #define SK_RESTRICT __restrict + #endif + #if !defined(SK_WARN_UNUSED_RESULT) + #define SK_WARN_UNUSED_RESULT + #endif +#endif + +#if !defined(SK_RESTRICT) + #define SK_RESTRICT __restrict__ +#endif + +#if !defined(SK_CPU_BENDIAN) && !defined(SK_CPU_LENDIAN) + #if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) + #define SK_CPU_BENDIAN + #elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) + #define SK_CPU_LENDIAN + #elif defined(__sparc) || defined(__sparc__) || \ + defined(_POWER) || defined(__powerpc__) || \ + defined(__ppc__) || defined(__hppa) || \ + defined(__PPC__) || defined(__PPC64__) || \ + defined(_MIPSEB) || defined(__ARMEB__) || \ + defined(__s390__) || \ + (defined(__sh__) && defined(__BIG_ENDIAN__)) || \ + (defined(__ia64) && defined(__BIG_ENDIAN__)) + #define SK_CPU_BENDIAN + #else + #define SK_CPU_LENDIAN + #endif +#endif + +#if defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64) + #define SK_CPU_X86 1 +#endif + +/** + * SK_CPU_SSE_LEVEL + * + * If defined, SK_CPU_SSE_LEVEL should be set to the highest supported level. + * On non-intel CPU this should be undefined. + */ +#define SK_CPU_SSE_LEVEL_SSE1 10 +#define SK_CPU_SSE_LEVEL_SSE2 20 +#define SK_CPU_SSE_LEVEL_SSE3 30 +#define SK_CPU_SSE_LEVEL_SSSE3 31 +#define SK_CPU_SSE_LEVEL_SSE41 41 +#define SK_CPU_SSE_LEVEL_SSE42 42 +#define SK_CPU_SSE_LEVEL_AVX 51 +#define SK_CPU_SSE_LEVEL_AVX2 52 +#define SK_CPU_SSE_LEVEL_SKX 60 + +// TODO(brianosman,kjlubick) clean up these checks + +// Are we in GCC/Clang? +#ifndef SK_CPU_SSE_LEVEL + // These checks must be done in descending order to ensure we set the highest + // available SSE level. + #if defined(__AVX512F__) && defined(__AVX512DQ__) && defined(__AVX512CD__) && \ + defined(__AVX512BW__) && defined(__AVX512VL__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SKX + #elif defined(__AVX2__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2 + #elif defined(__AVX__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX + #elif defined(__SSE4_2__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE42 + #elif defined(__SSE4_1__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE41 + #elif defined(__SSSE3__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSSE3 + #elif defined(__SSE3__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE3 + #elif defined(__SSE2__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2 + #endif +#endif + +// Are we in VisualStudio? +#ifndef SK_CPU_SSE_LEVEL + // These checks must be done in descending order to ensure we set the highest + // available SSE level. 64-bit intel guarantees at least SSE2 support. + #if defined(__AVX512F__) && defined(__AVX512DQ__) && defined(__AVX512CD__) && \ + defined(__AVX512BW__) && defined(__AVX512VL__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SKX + #elif defined(__AVX2__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2 + #elif defined(__AVX__) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX + #elif defined(_M_X64) || defined(_M_AMD64) + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2 + #elif defined(_M_IX86_FP) + #if _M_IX86_FP >= 2 + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2 + #elif _M_IX86_FP == 1 + #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE1 + #endif + #endif +#endif + +// ARM defines +#if defined(__arm__) && (!defined(__APPLE__) || !TARGET_IPHONE_SIMULATOR) + #define SK_CPU_ARM32 +#elif defined(__aarch64__) + #define SK_CPU_ARM64 +#endif + +// All 64-bit ARM chips have NEON. Many 32-bit ARM chips do too. +#if !defined(SK_ARM_HAS_NEON) && defined(__ARM_NEON) + #define SK_ARM_HAS_NEON +#endif + +#if defined(__ARM_FEATURE_CRC32) + #define SK_ARM_HAS_CRC32 +#endif + +#endif // SkFeatures_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkFixed.h b/gfx/skia/skia/include/private/base/SkFixed.h new file mode 100644 index 0000000000..2c8f2fb56c --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkFixed.h @@ -0,0 +1,143 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFixed_DEFINED +#define SkFixed_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMath.h" // IWYU pragma: keep +#include "include/private/base/SkTPin.h" // IWYU pragma: keep + +#include + +/** \file SkFixed.h + + Types and macros for 16.16 fixed point +*/ + +/** 32 bit signed integer used to represent fractions values with 16 bits to the right of the decimal point +*/ +typedef int32_t SkFixed; +#define SK_Fixed1 (1 << 16) +#define SK_FixedHalf (1 << 15) +#define SK_FixedQuarter (1 << 14) +#define SK_FixedMax (0x7FFFFFFF) +#define SK_FixedMin (-SK_FixedMax) +#define SK_FixedPI (0x3243F) +#define SK_FixedSqrt2 (92682) +#define SK_FixedTanPIOver8 (0x6A0A) +#define SK_FixedRoot2Over2 (0xB505) + +// NOTE: SkFixedToFloat is exact. SkFloatToFixed seems to lack a rounding step. For all fixed-point +// values, this version is as accurate as possible for (fixed -> float -> fixed). Rounding reduces +// accuracy if the intermediate floats are in the range that only holds integers (adding 0.5f to an +// odd integer then snaps to nearest even). Using double for the rounding math gives maximum +// accuracy for (float -> fixed -> float), but that's usually overkill. +#define SkFixedToFloat(x) ((x) * 1.52587890625e-5f) +#define SkFloatToFixed(x) sk_float_saturate2int((x) * SK_Fixed1) + +#ifdef SK_DEBUG + static inline SkFixed SkFloatToFixed_Check(float x) { + int64_t n64 = (int64_t)(x * SK_Fixed1); + SkFixed n32 = (SkFixed)n64; + SkASSERT(n64 == n32); + return n32; + } +#else + #define SkFloatToFixed_Check(x) SkFloatToFixed(x) +#endif + +#define SkFixedToDouble(x) ((x) * 1.52587890625e-5) +#define SkDoubleToFixed(x) ((SkFixed)((x) * SK_Fixed1)) + +/** Converts an integer to a SkFixed, asserting that the result does not overflow + a 32 bit signed integer +*/ +#ifdef SK_DEBUG + inline SkFixed SkIntToFixed(int n) + { + SkASSERT(n >= -32768 && n <= 32767); + // Left shifting a negative value has undefined behavior in C, so we cast to unsigned before + // shifting. + return (SkFixed)( (unsigned)n << 16 ); + } +#else + // Left shifting a negative value has undefined behavior in C, so we cast to unsigned before + // shifting. Then we force the cast to SkFixed to ensure that the answer is signed (like the + // debug version). + #define SkIntToFixed(n) (SkFixed)((unsigned)(n) << 16) +#endif + +#define SkFixedRoundToInt(x) (((x) + SK_FixedHalf) >> 16) +#define SkFixedCeilToInt(x) (((x) + SK_Fixed1 - 1) >> 16) +#define SkFixedFloorToInt(x) ((x) >> 16) + +static inline SkFixed SkFixedRoundToFixed(SkFixed x) { + return (SkFixed)( (uint32_t)(x + SK_FixedHalf) & 0xFFFF0000 ); +} +static inline SkFixed SkFixedCeilToFixed(SkFixed x) { + return (SkFixed)( (uint32_t)(x + SK_Fixed1 - 1) & 0xFFFF0000 ); +} +static inline SkFixed SkFixedFloorToFixed(SkFixed x) { + return (SkFixed)( (uint32_t)x & 0xFFFF0000 ); +} + +#define SkFixedAve(a, b) (((a) + (b)) >> 1) + +// The divide may exceed 32 bits. Clamp to a signed 32 bit result. +#define SkFixedDiv(numer, denom) \ + SkToS32(SkTPin((SkLeftShift((int64_t)(numer), 16) / (denom)), SK_MinS32, SK_MaxS32)) + +static inline SkFixed SkFixedMul(SkFixed a, SkFixed b) { + return (SkFixed)((int64_t)a * b >> 16); +} + +/////////////////////////////////////////////////////////////////////////////// +// Platform-specific alternatives to our portable versions. + +// The VCVT float-to-fixed instruction is part of the VFPv3 instruction set. +#if defined(__ARM_VFPV3__) + #include + + /* This does not handle NaN or other obscurities, but is faster than + than (int)(x*65536). When built on Android with -Os, needs forcing + to inline or we lose the speed benefit. + */ + SK_ALWAYS_INLINE SkFixed SkFloatToFixed_arm(float x) + { + int32_t y; + asm("vcvt.s32.f32 %0, %0, #16": "+w"(x)); + std::memcpy(&y, &x, sizeof(y)); + return y; + } + #undef SkFloatToFixed + #define SkFloatToFixed(x) SkFloatToFixed_arm(x) +#endif + +/////////////////////////////////////////////////////////////////////////////// + +#define SkFixedToScalar(x) SkFixedToFloat(x) +#define SkScalarToFixed(x) SkFloatToFixed(x) + +/////////////////////////////////////////////////////////////////////////////// + +typedef int64_t SkFixed3232; // 32.32 + +#define SkFixed3232Max SK_MaxS64 +#define SkFixed3232Min (-SkFixed3232Max) + +#define SkIntToFixed3232(x) (SkLeftShift((SkFixed3232)(x), 32)) +#define SkFixed3232ToInt(x) ((int)((x) >> 32)) +#define SkFixedToFixed3232(x) (SkLeftShift((SkFixed3232)(x), 16)) +#define SkFixed3232ToFixed(x) ((SkFixed)((x) >> 16)) +#define SkFloatToFixed3232(x) sk_float_saturate2int64((x) * (65536.0f * 65536.0f)) +#define SkFixed3232ToFloat(x) (x * (1 / (65536.0f * 65536.0f))) + +#define SkScalarToFixed3232(x) SkFloatToFixed3232(x) + +#endif diff --git a/gfx/skia/skia/include/private/base/SkFloatBits.h b/gfx/skia/skia/include/private/base/SkFloatBits.h new file mode 100644 index 0000000000..37a7b271ae --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkFloatBits.h @@ -0,0 +1,90 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFloatBits_DEFINED +#define SkFloatBits_DEFINED + +#include "include/private/base/SkMath.h" + +#include + +/** Convert a sign-bit int (i.e. float interpreted as int) into a 2s compliement + int. This also converts -0 (0x80000000) to 0. Doing this to a float allows + it to be compared using normal C operators (<, <=, etc.) +*/ +static inline int32_t SkSignBitTo2sCompliment(int32_t x) { + if (x < 0) { + x &= 0x7FFFFFFF; + x = -x; + } + return x; +} + +/** Convert a 2s compliment int to a sign-bit (i.e. int interpreted as float). + This undoes the result of SkSignBitTo2sCompliment(). + */ +static inline int32_t Sk2sComplimentToSignBit(int32_t x) { + int sign = x >> 31; + // make x positive + x = (x ^ sign) - sign; + // set the sign bit as needed + x |= SkLeftShift(sign, 31); + return x; +} + +union SkFloatIntUnion { + float fFloat; + int32_t fSignBitInt; +}; + +// Helper to see a float as its bit pattern (w/o aliasing warnings) +static inline int32_t SkFloat2Bits(float x) { + SkFloatIntUnion data; + data.fFloat = x; + return data.fSignBitInt; +} + +// Helper to see a bit pattern as a float (w/o aliasing warnings) +static inline float SkBits2Float(int32_t floatAsBits) { + SkFloatIntUnion data; + data.fSignBitInt = floatAsBits; + return data.fFloat; +} + +constexpr int32_t gFloatBits_exponent_mask = 0x7F800000; +constexpr int32_t gFloatBits_matissa_mask = 0x007FFFFF; + +static inline bool SkFloatBits_IsFinite(int32_t bits) { + return (bits & gFloatBits_exponent_mask) != gFloatBits_exponent_mask; +} + +static inline bool SkFloatBits_IsInf(int32_t bits) { + return ((bits & gFloatBits_exponent_mask) == gFloatBits_exponent_mask) && + (bits & gFloatBits_matissa_mask) == 0; +} + +/** Return the float as a 2s compliment int. Just to be used to compare floats + to each other or against positive float-bit-constants (like 0). This does + not return the int equivalent of the float, just something cheaper for + compares-only. + */ +static inline int32_t SkFloatAs2sCompliment(float x) { + return SkSignBitTo2sCompliment(SkFloat2Bits(x)); +} + +/** Return the 2s compliment int as a float. This undos the result of + SkFloatAs2sCompliment + */ +static inline float Sk2sComplimentAsFloat(int32_t x) { + return SkBits2Float(Sk2sComplimentToSignBit(x)); +} + +// Scalar wrappers for float-bit routines + +#define SkScalarAs2sCompliment(x) SkFloatAs2sCompliment(x) + +#endif diff --git a/gfx/skia/skia/include/private/base/SkFloatingPoint.h b/gfx/skia/skia/include/private/base/SkFloatingPoint.h new file mode 100644 index 0000000000..4b2eb4d897 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkFloatingPoint.h @@ -0,0 +1,247 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFloatingPoint_DEFINED +#define SkFloatingPoint_DEFINED + +#include "include/private/base/SkAttributes.h" +#include "include/private/base/SkFloatBits.h" +#include "include/private/base/SkMath.h" + +#include +#include +#include +#include + +constexpr float SK_FloatSqrt2 = 1.41421356f; +constexpr float SK_FloatPI = 3.14159265f; +constexpr double SK_DoublePI = 3.14159265358979323846264338327950288; + +// C++98 cmath std::pow seems to be the earliest portable way to get float pow. +// However, on Linux including cmath undefines isfinite. +// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14608 +static inline float sk_float_pow(float base, float exp) { + return powf(base, exp); +} + +#define sk_float_sqrt(x) sqrtf(x) +#define sk_float_sin(x) sinf(x) +#define sk_float_cos(x) cosf(x) +#define sk_float_tan(x) tanf(x) +#define sk_float_floor(x) floorf(x) +#define sk_float_ceil(x) ceilf(x) +#define sk_float_trunc(x) truncf(x) +#ifdef SK_BUILD_FOR_MAC +# define sk_float_acos(x) static_cast(acos(x)) +# define sk_float_asin(x) static_cast(asin(x)) +#else +# define sk_float_acos(x) acosf(x) +# define sk_float_asin(x) asinf(x) +#endif +#define sk_float_atan2(y,x) atan2f(y,x) +#define sk_float_abs(x) fabsf(x) +#define sk_float_copysign(x, y) copysignf(x, y) +#define sk_float_mod(x,y) fmodf(x,y) +#define sk_float_exp(x) expf(x) +#define sk_float_log(x) logf(x) + +constexpr float sk_float_degrees_to_radians(float degrees) { + return degrees * (SK_FloatPI / 180); +} + +constexpr float sk_float_radians_to_degrees(float radians) { + return radians * (180 / SK_FloatPI); +} + +// floor(double+0.5) vs. floorf(float+0.5f) give comparable performance, but upcasting to double +// means tricky values like 0.49999997 and 2^24 get rounded correctly. If these were rounded +// as floatf(x + .5f), they would be 1 higher than expected. +#define sk_float_round(x) (float)sk_double_round((double)(x)) + +// can't find log2f on android, but maybe that just a tool bug? +#ifdef SK_BUILD_FOR_ANDROID + static inline float sk_float_log2(float x) { + const double inv_ln_2 = 1.44269504088896; + return (float)(log(x) * inv_ln_2); + } +#else + #define sk_float_log2(x) log2f(x) +#endif + +static inline bool sk_float_isfinite(float x) { + return SkFloatBits_IsFinite(SkFloat2Bits(x)); +} + +static inline bool sk_floats_are_finite(float a, float b) { + return sk_float_isfinite(a) && sk_float_isfinite(b); +} + +static inline bool sk_floats_are_finite(const float array[], int count) { + float prod = 0; + for (int i = 0; i < count; ++i) { + prod *= array[i]; + } + // At this point, prod will either be NaN or 0 + return prod == 0; // if prod is NaN, this check will return false +} + +static inline bool sk_float_isinf(float x) { + return SkFloatBits_IsInf(SkFloat2Bits(x)); +} + +#ifdef SK_BUILD_FOR_WIN + #define sk_float_isnan(x) _isnan(x) +#elif defined(__clang__) || defined(__GNUC__) + #define sk_float_isnan(x) __builtin_isnan(x) +#else + #define sk_float_isnan(x) isnan(x) +#endif + +#define sk_double_isnan(a) sk_float_isnan(a) + +#define SK_MaxS32FitsInFloat 2147483520 +#define SK_MinS32FitsInFloat -SK_MaxS32FitsInFloat + +#define SK_MaxS64FitsInFloat (SK_MaxS64 >> (63-24) << (63-24)) // 0x7fffff8000000000 +#define SK_MinS64FitsInFloat -SK_MaxS64FitsInFloat + +/** + * Return the closest int for the given float. Returns SK_MaxS32FitsInFloat for NaN. + */ +static inline int sk_float_saturate2int(float x) { + x = x < SK_MaxS32FitsInFloat ? x : SK_MaxS32FitsInFloat; + x = x > SK_MinS32FitsInFloat ? x : SK_MinS32FitsInFloat; + return (int)x; +} + +/** + * Return the closest int for the given double. Returns SK_MaxS32 for NaN. + */ +static inline int sk_double_saturate2int(double x) { + x = x < SK_MaxS32 ? x : SK_MaxS32; + x = x > SK_MinS32 ? x : SK_MinS32; + return (int)x; +} + +/** + * Return the closest int64_t for the given float. Returns SK_MaxS64FitsInFloat for NaN. + */ +static inline int64_t sk_float_saturate2int64(float x) { + x = x < SK_MaxS64FitsInFloat ? x : SK_MaxS64FitsInFloat; + x = x > SK_MinS64FitsInFloat ? x : SK_MinS64FitsInFloat; + return (int64_t)x; +} + +#define sk_float_floor2int(x) sk_float_saturate2int(sk_float_floor(x)) +#define sk_float_round2int(x) sk_float_saturate2int(sk_float_round(x)) +#define sk_float_ceil2int(x) sk_float_saturate2int(sk_float_ceil(x)) + +#define sk_float_floor2int_no_saturate(x) (int)sk_float_floor(x) +#define sk_float_round2int_no_saturate(x) (int)sk_float_round(x) +#define sk_float_ceil2int_no_saturate(x) (int)sk_float_ceil(x) + +#define sk_double_floor(x) floor(x) +#define sk_double_round(x) floor((x) + 0.5) +#define sk_double_ceil(x) ceil(x) +#define sk_double_floor2int(x) (int)sk_double_floor(x) +#define sk_double_round2int(x) (int)sk_double_round(x) +#define sk_double_ceil2int(x) (int)sk_double_ceil(x) + +// Cast double to float, ignoring any warning about too-large finite values being cast to float. +// Clang thinks this is undefined, but it's actually implementation defined to return either +// the largest float or infinity (one of the two bracketing representable floats). Good enough! +#ifdef __clang__ +SK_NO_SANITIZE("float-cast-overflow") +#elif defined(__GNUC__) +SK_ATTRIBUTE(no_sanitize_undefined) +#endif +static inline float sk_double_to_float(double x) { + return static_cast(x); +} + +#define SK_FloatNaN std::numeric_limits::quiet_NaN() +#define SK_FloatInfinity (+std::numeric_limits::infinity()) +#define SK_FloatNegativeInfinity (-std::numeric_limits::infinity()) + +#define SK_DoubleNaN std::numeric_limits::quiet_NaN() + +// Returns false if any of the floats are outside of [0...1] +// Returns true if count is 0 +bool sk_floats_are_unit(const float array[], size_t count); + +static inline float sk_float_rsqrt_portable(float x) { return 1.0f / sk_float_sqrt(x); } +static inline float sk_float_rsqrt (float x) { return 1.0f / sk_float_sqrt(x); } + +// Returns the log2 of the provided value, were that value to be rounded up to the next power of 2. +// Returns 0 if value <= 0: +// Never returns a negative number, even if value is NaN. +// +// sk_float_nextlog2((-inf..1]) -> 0 +// sk_float_nextlog2((1..2]) -> 1 +// sk_float_nextlog2((2..4]) -> 2 +// sk_float_nextlog2((4..8]) -> 3 +// ... +static inline int sk_float_nextlog2(float x) { + uint32_t bits = (uint32_t)SkFloat2Bits(x); + bits += (1u << 23) - 1u; // Increment the exponent for non-powers-of-2. + int exp = ((int32_t)bits >> 23) - 127; + return exp & ~(exp >> 31); // Return 0 for negative or denormalized floats, and exponents < 0. +} + +// This is the number of significant digits we can print in a string such that when we read that +// string back we get the floating point number we expect. The minimum value C requires is 6, but +// most compilers support 9 +#ifdef FLT_DECIMAL_DIG +#define SK_FLT_DECIMAL_DIG FLT_DECIMAL_DIG +#else +#define SK_FLT_DECIMAL_DIG 9 +#endif + +// IEEE defines how float divide behaves for non-finite values and zero-denoms, but C does not +// so we have a helper that suppresses the possible undefined-behavior warnings. + +#ifdef __clang__ +SK_NO_SANITIZE("float-divide-by-zero") +#elif defined(__GNUC__) +SK_ATTRIBUTE(no_sanitize_undefined) +#endif +static inline float sk_ieee_float_divide(float numer, float denom) { + return numer / denom; +} + +#ifdef __clang__ +SK_NO_SANITIZE("float-divide-by-zero") +#elif defined(__GNUC__) +SK_ATTRIBUTE(no_sanitize_undefined) +#endif +static inline double sk_ieee_double_divide(double numer, double denom) { + return numer / denom; +} + +// While we clean up divide by zero, we'll replace places that do divide by zero with this TODO. +static inline float sk_ieee_float_divide_TODO_IS_DIVIDE_BY_ZERO_SAFE_HERE(float n, float d) { + return sk_ieee_float_divide(n,d); +} + +static inline float sk_fmaf(float f, float m, float a) { +#if defined(FP_FAST_FMA) + return std::fmaf(f,m,a); +#else + return f*m+a; +#endif +} + +// Returns true iff the provided number is within a small epsilon of 0. +bool sk_double_nearly_zero(double a); + +// Comparing floating point numbers is complicated. This helper only works if one or none +// of the two inputs is not very close to zero. It also does not work if both inputs could be NaN. +// The term "ulps" stands for "units of least precision". Read the following for more nuance: +// https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/ +bool sk_doubles_nearly_equal_ulps(double a, double b, uint8_t max_ulps_diff=16); + +#endif diff --git a/gfx/skia/skia/include/private/base/SkLoadUserConfig.h b/gfx/skia/skia/include/private/base/SkLoadUserConfig.h new file mode 100644 index 0000000000..397d40bf0c --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkLoadUserConfig.h @@ -0,0 +1,58 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SK_USER_CONFIG_WAS_LOADED + +// Include this to set reasonable defaults (e.g. for SK_CPU_LENDIAN) +#include "include/private/base/SkFeatures.h" + +// Allows embedders that want to disable macros that take arguments to just +// define that symbol to be one of these +#define SK_NOTHING_ARG1(arg1) +#define SK_NOTHING_ARG2(arg1, arg2) +#define SK_NOTHING_ARG3(arg1, arg2, arg3) + +// IWYU pragma: begin_exports + +// Note: SK_USER_CONFIG_HEADER will not work with Bazel builds, as that file will not +// be specified for the Bazel sandbox. +#if defined (SK_USER_CONFIG_HEADER) + #include SK_USER_CONFIG_HEADER +#else + #include "include/config/SkUserConfig.h" +#endif +// IWYU pragma: end_exports + +// Checks to make sure the SkUserConfig options do not conflict. +#if !defined(SK_DEBUG) && !defined(SK_RELEASE) + #ifdef NDEBUG + #define SK_RELEASE + #else + #define SK_DEBUG + #endif +#endif + +#if defined(SK_DEBUG) && defined(SK_RELEASE) +# error "cannot define both SK_DEBUG and SK_RELEASE" +#elif !defined(SK_DEBUG) && !defined(SK_RELEASE) +# error "must define either SK_DEBUG or SK_RELEASE" +#endif + +#if defined(SK_CPU_LENDIAN) && defined(SK_CPU_BENDIAN) +# error "cannot define both SK_CPU_LENDIAN and SK_CPU_BENDIAN" +#elif !defined(SK_CPU_LENDIAN) && !defined(SK_CPU_BENDIAN) +# error "must define either SK_CPU_LENDIAN or SK_CPU_BENDIAN" +#endif + +#if defined(SK_CPU_BENDIAN) && !defined(I_ACKNOWLEDGE_SKIA_DOES_NOT_SUPPORT_BIG_ENDIAN) + #error "The Skia team is not endian-savvy enough to support big-endian CPUs." + #error "If you still want to use Skia," + #error "please define I_ACKNOWLEDGE_SKIA_DOES_NOT_SUPPORT_BIG_ENDIAN." +#endif + +#define SK_USER_CONFIG_WAS_LOADED +#endif // SK_USER_CONFIG_WAS_LOADED diff --git a/gfx/skia/skia/include/private/base/SkMacros.h b/gfx/skia/skia/include/private/base/SkMacros.h new file mode 100644 index 0000000000..a28602c4fb --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkMacros.h @@ -0,0 +1,107 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkMacros_DEFINED +#define SkMacros_DEFINED + +/* + * Usage: SK_MACRO_CONCAT(a, b) to construct the symbol ab + * + * SK_MACRO_CONCAT_IMPL_PRIV just exists to make this work. Do not use directly + * + */ +#define SK_MACRO_CONCAT(X, Y) SK_MACRO_CONCAT_IMPL_PRIV(X, Y) +#define SK_MACRO_CONCAT_IMPL_PRIV(X, Y) X ## Y + +/* + * Usage: SK_MACRO_APPEND_LINE(foo) to make foo123, where 123 is the current + * line number. Easy way to construct + * unique names for local functions or + * variables. + */ +#define SK_MACRO_APPEND_LINE(name) SK_MACRO_CONCAT(name, __LINE__) + +#define SK_MACRO_APPEND_COUNTER(name) SK_MACRO_CONCAT(name, __COUNTER__) + +//////////////////////////////////////////////////////////////////////////////// + +// Can be used to bracket data types that must be dense/packed, e.g. hash keys. +#if defined(__clang__) // This should work on GCC too, but GCC diagnostic pop didn't seem to work! + #define SK_BEGIN_REQUIRE_DENSE _Pragma("GCC diagnostic push") \ + _Pragma("GCC diagnostic error \"-Wpadded\"") + #define SK_END_REQUIRE_DENSE _Pragma("GCC diagnostic pop") +#else + #define SK_BEGIN_REQUIRE_DENSE + #define SK_END_REQUIRE_DENSE +#endif + +#ifdef MOZ_SKIA + + #ifdef MOZ_ASAN + #include "mozilla/MemoryChecking.h" + #define SK_INTENTIONALLY_LEAKED(X) MOZ_LSAN_INTENTIONALLY_LEAK_OBJECT(X) + #else + #define SK_INTENTIONALLY_LEAKED(x) ((void)0) + #endif + +#else // !MOZ_SKIA + +#if defined(__clang__) && defined(__has_feature) + // Some compilers have a preprocessor that does not appear to do short-circuit + // evaluation as expected + #if __has_feature(leak_sanitizer) || __has_feature(address_sanitizer) + // Chrome had issues if we tried to include lsan_interface.h ourselves. + // https://github.com/llvm/llvm-project/blob/10a35632d55bb05004fe3d0c2d4432bb74897ee7/compiler-rt/include/sanitizer/lsan_interface.h#L26 +extern "C" { + void __lsan_ignore_object(const void *p); +} + #define SK_INTENTIONALLY_LEAKED(X) __lsan_ignore_object(X) + #else + #define SK_INTENTIONALLY_LEAKED(X) ((void)0) + #endif +#else + #define SK_INTENTIONALLY_LEAKED(X) ((void)0) +#endif + +#endif // MOZ_SKIA + +#define SK_INIT_TO_AVOID_WARNING = 0 + +//////////////////////////////////////////////////////////////////////////////// + +/** + * Defines overloaded bitwise operators to make it easier to use an enum as a + * bitfield. + */ +#define SK_MAKE_BITFIELD_OPS(X) \ + inline X operator ~(X a) { \ + using U = std::underlying_type_t; \ + return (X) (~static_cast(a)); \ + } \ + inline X operator |(X a, X b) { \ + using U = std::underlying_type_t; \ + return (X) (static_cast(a) | static_cast(b)); \ + } \ + inline X& operator |=(X& a, X b) { \ + return (a = a | b); \ + } \ + inline X operator &(X a, X b) { \ + using U = std::underlying_type_t; \ + return (X) (static_cast(a) & static_cast(b)); \ + } \ + inline X& operator &=(X& a, X b) { \ + return (a = a & b); \ + } + +#define SK_DECL_BITFIELD_OPS_FRIENDS(X) \ + friend X operator ~(X a); \ + friend X operator |(X a, X b); \ + friend X& operator |=(X& a, X b); \ + \ + friend X operator &(X a, X b); \ + friend X& operator &=(X& a, X b); + +#endif // SkMacros_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkMalloc.h b/gfx/skia/skia/include/private/base/SkMalloc.h new file mode 100644 index 0000000000..1c0c2e73da --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkMalloc.h @@ -0,0 +1,144 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMalloc_DEFINED +#define SkMalloc_DEFINED + +#include + +#include "include/private/base/SkAPI.h" + +/* + memory wrappers to be implemented by the porting layer (platform) +*/ + + +/** Free memory returned by sk_malloc(). It is safe to pass null. */ +SK_API extern void sk_free(void*); + +/** + * Called internally if we run out of memory. The platform implementation must + * not return, but should either throw an exception or otherwise exit. + */ +SK_API extern void sk_out_of_memory(void); + +enum { + /** + * If this bit is set, the returned buffer must be zero-initialized. If this bit is not set + * the buffer can be uninitialized. + */ + SK_MALLOC_ZERO_INITIALIZE = 1 << 0, + + /** + * If this bit is set, the implementation must throw/crash/quit if the request cannot + * be fulfilled. If this bit is not set, then it should return nullptr on failure. + */ + SK_MALLOC_THROW = 1 << 1, +}; +/** + * Return a block of memory (at least 4-byte aligned) of at least the specified size. + * If the requested memory cannot be returned, either return nullptr or throw/exit, depending + * on the SK_MALLOC_THROW bit. If the allocation succeeds, the memory will be zero-initialized + * if the SK_MALLOC_ZERO_INITIALIZE bit was set. + * + * To free the memory, call sk_free() + */ +SK_API extern void* sk_malloc_flags(size_t size, unsigned flags); + +/** Same as standard realloc(), but this one never returns null on failure. It will throw + * if it fails. + * If size is 0, it will call sk_free on buffer and return null. (This behavior is implementation- + * defined for normal realloc. We follow what glibc does.) + */ +SK_API extern void* sk_realloc_throw(void* buffer, size_t size); + +static inline void* sk_malloc_throw(size_t size) { + return sk_malloc_flags(size, SK_MALLOC_THROW); +} + +static inline void* sk_calloc_throw(size_t size) { + return sk_malloc_flags(size, SK_MALLOC_THROW | SK_MALLOC_ZERO_INITIALIZE); +} + +static inline void* sk_calloc_canfail(size_t size) { +#if defined(SK_BUILD_FOR_FUZZER) + // To reduce the chance of OOM, pretend we can't allocate more than 200kb. + if (size > 200000) { + return nullptr; + } +#endif + return sk_malloc_flags(size, SK_MALLOC_ZERO_INITIALIZE); +} + +// Performs a safe multiply count * elemSize, checking for overflow +SK_API extern void* sk_calloc_throw(size_t count, size_t elemSize); +SK_API extern void* sk_malloc_throw(size_t count, size_t elemSize); +SK_API extern void* sk_realloc_throw(void* buffer, size_t count, size_t elemSize); + +/** + * These variants return nullptr on failure + */ +static inline void* sk_malloc_canfail(size_t size) { +#if defined(SK_BUILD_FOR_FUZZER) + // To reduce the chance of OOM, pretend we can't allocate more than 200kb. + if (size > 200000) { + return nullptr; + } +#endif + return sk_malloc_flags(size, 0); +} +SK_API extern void* sk_malloc_canfail(size_t count, size_t elemSize); + +// bzero is safer than memset, but we can't rely on it, so... sk_bzero() +static inline void sk_bzero(void* buffer, size_t size) { + // Please c.f. sk_careful_memcpy. It's undefined behavior to call memset(null, 0, 0). + if (size) { + memset(buffer, 0, size); + } +} + +/** + * sk_careful_memcpy() is just like memcpy(), but guards against undefined behavior. + * + * It is undefined behavior to call memcpy() with null dst or src, even if len is 0. + * If an optimizer is "smart" enough, it can exploit this to do unexpected things. + * memcpy(dst, src, 0); + * if (src) { + * printf("%x\n", *src); + * } + * In this code the compiler can assume src is not null and omit the if (src) {...} check, + * unconditionally running the printf, crashing the program if src really is null. + * Of the compilers we pay attention to only GCC performs this optimization in practice. + */ +static inline void* sk_careful_memcpy(void* dst, const void* src, size_t len) { + // When we pass >0 len we had better already be passing valid pointers. + // So we just need to skip calling memcpy when len == 0. + if (len) { + memcpy(dst,src,len); + } + return dst; +} + +static inline void* sk_careful_memmove(void* dst, const void* src, size_t len) { + // When we pass >0 len we had better already be passing valid pointers. + // So we just need to skip calling memcpy when len == 0. + if (len) { + memmove(dst,src,len); + } + return dst; +} + +static inline int sk_careful_memcmp(const void* a, const void* b, size_t len) { + // When we pass >0 len we had better already be passing valid pointers. + // So we just need to skip calling memcmp when len == 0. + if (len == 0) { + return 0; // we treat zero-length buffers as "equal" + } + return memcmp(a, b, len); +} + +#endif // SkMalloc_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkMath.h b/gfx/skia/skia/include/private/base/SkMath.h new file mode 100644 index 0000000000..34bfa739f7 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkMath.h @@ -0,0 +1,77 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMath_DEFINED +#define SkMath_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkCPUTypes.h" + +#include +#include + +// Max Signed 16 bit value +static constexpr int16_t SK_MaxS16 = INT16_MAX; +static constexpr int16_t SK_MinS16 = -SK_MaxS16; + +static constexpr int32_t SK_MaxS32 = INT32_MAX; +static constexpr int32_t SK_MinS32 = -SK_MaxS32; +static constexpr int32_t SK_NaN32 = INT32_MIN; + +static constexpr int64_t SK_MaxS64 = INT64_MAX; +static constexpr int64_t SK_MinS64 = -SK_MaxS64; + +// 64bit -> 32bit utilities + +// Handy util that can be passed two ints, and will automatically promote to +// 64bits before the multiply, so the caller doesn't have to remember to cast +// e.g. (int64_t)a * b; +static inline int64_t sk_64_mul(int64_t a, int64_t b) { + return a * b; +} + +static inline constexpr int32_t SkLeftShift(int32_t value, int32_t shift) { + return (int32_t) ((uint32_t) value << shift); +} + +static inline constexpr int64_t SkLeftShift(int64_t value, int32_t shift) { + return (int64_t) ((uint64_t) value << shift); +} + +/////////////////////////////////////////////////////////////////////////////// + +/** + * Returns true if value is a power of 2. Does not explicitly check for + * value <= 0. + */ +template constexpr inline bool SkIsPow2(T value) { + return (value & (value - 1)) == 0; +} + +/////////////////////////////////////////////////////////////////////////////// + +/** + * Return a*b/((1 << shift) - 1), rounding any fractional bits. + * Only valid if a and b are unsigned and <= 32767 and shift is > 0 and <= 8 + */ +static inline unsigned SkMul16ShiftRound(U16CPU a, U16CPU b, int shift) { + SkASSERT(a <= 32767); + SkASSERT(b <= 32767); + SkASSERT(shift > 0 && shift <= 8); + unsigned prod = a*b + (1 << (shift - 1)); + return (prod + (prod >> shift)) >> shift; +} + +/** + * Return a*b/255, rounding any fractional bits. + * Only valid if a and b are unsigned and <= 32767. + */ +static inline U8CPU SkMulDiv255Round(U16CPU a, U16CPU b) { + return SkMul16ShiftRound(a, b, 8); +} + +#endif diff --git a/gfx/skia/skia/include/private/base/SkMutex.h b/gfx/skia/skia/include/private/base/SkMutex.h new file mode 100644 index 0000000000..4452beb912 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkMutex.h @@ -0,0 +1,64 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMutex_DEFINED +#define SkMutex_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkSemaphore.h" +#include "include/private/base/SkThreadAnnotations.h" +#include "include/private/base/SkThreadID.h" + +class SK_CAPABILITY("mutex") SkMutex { +public: + constexpr SkMutex() = default; + + ~SkMutex() { + this->assertNotHeld(); + } + + void acquire() SK_ACQUIRE() { + fSemaphore.wait(); + SkDEBUGCODE(fOwner = SkGetThreadID();) + } + + void release() SK_RELEASE_CAPABILITY() { + this->assertHeld(); + SkDEBUGCODE(fOwner = kIllegalThreadID;) + fSemaphore.signal(); + } + + void assertHeld() SK_ASSERT_CAPABILITY(this) { + SkASSERT(fOwner == SkGetThreadID()); + } + + void assertNotHeld() { + SkASSERT(fOwner == kIllegalThreadID); + } + +private: + SkSemaphore fSemaphore{1}; + SkDEBUGCODE(SkThreadID fOwner{kIllegalThreadID};) +}; + +class SK_SCOPED_CAPABILITY SkAutoMutexExclusive { +public: + SkAutoMutexExclusive(SkMutex& mutex) SK_ACQUIRE(mutex) : fMutex(mutex) { fMutex.acquire(); } + ~SkAutoMutexExclusive() SK_RELEASE_CAPABILITY() { fMutex.release(); } + + SkAutoMutexExclusive(const SkAutoMutexExclusive&) = delete; + SkAutoMutexExclusive(SkAutoMutexExclusive&&) = delete; + + SkAutoMutexExclusive& operator=(const SkAutoMutexExclusive&) = delete; + SkAutoMutexExclusive& operator=(SkAutoMutexExclusive&&) = delete; + +private: + SkMutex& fMutex; +}; + +#endif // SkMutex_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkNoncopyable.h b/gfx/skia/skia/include/private/base/SkNoncopyable.h new file mode 100644 index 0000000000..ec4a4e5161 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkNoncopyable.h @@ -0,0 +1,30 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkNoncopyable_DEFINED +#define SkNoncopyable_DEFINED + +#include "include/private/base/SkAPI.h" + +/** \class SkNoncopyable (DEPRECATED) + + SkNoncopyable is the base class for objects that do not want to + be copied. It hides its copy-constructor and its assignment-operator. +*/ +class SK_API SkNoncopyable { +public: + SkNoncopyable() = default; + + SkNoncopyable(SkNoncopyable&&) = default; + SkNoncopyable& operator =(SkNoncopyable&&) = default; + +private: + SkNoncopyable(const SkNoncopyable&) = delete; + SkNoncopyable& operator=(const SkNoncopyable&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/private/base/SkOnce.h b/gfx/skia/skia/include/private/base/SkOnce.h new file mode 100644 index 0000000000..97ce6b6311 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkOnce.h @@ -0,0 +1,55 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOnce_DEFINED +#define SkOnce_DEFINED + +#include "include/private/base/SkThreadAnnotations.h" + +#include +#include +#include + +// SkOnce provides call-once guarantees for Skia, much like std::once_flag/std::call_once(). +// +// There should be no particularly error-prone gotcha use cases when using SkOnce. +// It works correctly as a class member, a local, a global, a function-scoped static, whatever. + +class SkOnce { +public: + constexpr SkOnce() = default; + + template + void operator()(Fn&& fn, Args&&... args) { + auto state = fState.load(std::memory_order_acquire); + + if (state == Done) { + return; + } + + // If it looks like no one has started calling fn(), try to claim that job. + if (state == NotStarted && fState.compare_exchange_strong(state, Claimed, + std::memory_order_relaxed, + std::memory_order_relaxed)) { + // Great! We'll run fn() then notify the other threads by releasing Done into fState. + fn(std::forward(args)...); + return fState.store(Done, std::memory_order_release); + } + + // Some other thread is calling fn(). + // We'll just spin here acquiring until it releases Done into fState. + SK_POTENTIALLY_BLOCKING_REGION_BEGIN; + while (fState.load(std::memory_order_acquire) != Done) { /*spin*/ } + SK_POTENTIALLY_BLOCKING_REGION_END; + } + +private: + enum State : uint8_t { NotStarted, Claimed, Done}; + std::atomic fState{NotStarted}; +}; + +#endif // SkOnce_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkPathEnums.h b/gfx/skia/skia/include/private/base/SkPathEnums.h new file mode 100644 index 0000000000..642bbb3489 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkPathEnums.h @@ -0,0 +1,25 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * This file contains private enums related to paths. See also skbug.com/10670 + */ + +#ifndef SkPathEnums_DEFINED +#define SkPathEnums_DEFINED + +enum class SkPathConvexity { + kConvex, + kConcave, + kUnknown, +}; + +enum class SkPathFirstDirection { + kCW, // == SkPathDirection::kCW + kCCW, // == SkPathDirection::kCCW + kUnknown, +}; + +#endif diff --git a/gfx/skia/skia/include/private/base/SkSafe32.h b/gfx/skia/skia/include/private/base/SkSafe32.h new file mode 100644 index 0000000000..5ba4c2f9a4 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkSafe32.h @@ -0,0 +1,49 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSafe32_DEFINED +#define SkSafe32_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkMath.h" + +#include + +static constexpr int32_t Sk64_pin_to_s32(int64_t x) { + return x < SK_MinS32 ? SK_MinS32 : (x > SK_MaxS32 ? SK_MaxS32 : (int32_t)x); +} + +static constexpr int32_t Sk32_sat_add(int32_t a, int32_t b) { + return Sk64_pin_to_s32((int64_t)a + (int64_t)b); +} + +static constexpr int32_t Sk32_sat_sub(int32_t a, int32_t b) { + return Sk64_pin_to_s32((int64_t)a - (int64_t)b); +} + +// To avoid UBSAN complaints about 2's compliment overflows +// +static constexpr int32_t Sk32_can_overflow_add(int32_t a, int32_t b) { + return (int32_t)((uint32_t)a + (uint32_t)b); +} +static constexpr int32_t Sk32_can_overflow_sub(int32_t a, int32_t b) { + return (int32_t)((uint32_t)a - (uint32_t)b); +} + +/** + * This is a 'safe' abs for 32-bit integers that asserts when undefined behavior would occur. + * SkTAbs (in SkTemplates.h) is a general purpose absolute-value function. + */ +static inline int32_t SkAbs32(int32_t value) { + SkASSERT(value != SK_NaN32); // The most negative int32_t can't be negated. + if (value < 0) { + value = -value; + } + return value; +} + +#endif diff --git a/gfx/skia/skia/include/private/base/SkSemaphore.h b/gfx/skia/skia/include/private/base/SkSemaphore.h new file mode 100644 index 0000000000..f78ee86625 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkSemaphore.h @@ -0,0 +1,84 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSemaphore_DEFINED +#define SkSemaphore_DEFINED + +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkThreadAnnotations.h" + +#include +#include + +class SkSemaphore { +public: + constexpr SkSemaphore(int count = 0) : fCount(count), fOSSemaphore(nullptr) {} + + // Cleanup the underlying OS semaphore. + SK_SPI ~SkSemaphore(); + + // Increment the counter n times. + // Generally it's better to call signal(n) instead of signal() n times. + void signal(int n = 1); + + // Decrement the counter by 1, + // then if the counter is < 0, sleep this thread until the counter is >= 0. + void wait(); + + // If the counter is positive, decrement it by 1 and return true, otherwise return false. + SK_SPI bool try_wait(); + +private: + // This implementation follows the general strategy of + // 'A Lightweight Semaphore with Partial Spinning' + // found here + // http://preshing.com/20150316/semaphores-are-surprisingly-versatile/ + // That article (and entire blog) are very much worth reading. + // + // We wrap an OS-provided semaphore with a user-space atomic counter that + // lets us avoid interacting with the OS semaphore unless strictly required: + // moving the count from >=0 to <0 or vice-versa, i.e. sleeping or waking threads. + struct OSSemaphore; + + SK_SPI void osSignal(int n); + SK_SPI void osWait(); + + std::atomic fCount; + SkOnce fOSSemaphoreOnce; + OSSemaphore* fOSSemaphore; +}; + +inline void SkSemaphore::signal(int n) { + int prev = fCount.fetch_add(n, std::memory_order_release); + + // We only want to call the OS semaphore when our logical count crosses + // from <0 to >=0 (when we need to wake sleeping threads). + // + // This is easiest to think about with specific examples of prev and n. + // If n == 5 and prev == -3, there are 3 threads sleeping and we signal + // std::min(-(-3), 5) == 3 times on the OS semaphore, leaving the count at 2. + // + // If prev >= 0, no threads are waiting, std::min(-prev, n) is always <= 0, + // so we don't call the OS semaphore, leaving the count at (prev + n). + int toSignal = std::min(-prev, n); + if (toSignal > 0) { + this->osSignal(toSignal); + } +} + +inline void SkSemaphore::wait() { + // Since this fetches the value before the subtract, zero and below means that there are no + // resources left, so the thread needs to wait. + if (fCount.fetch_sub(1, std::memory_order_acquire) <= 0) { + SK_POTENTIALLY_BLOCKING_REGION_BEGIN; + this->osWait(); + SK_POTENTIALLY_BLOCKING_REGION_END; + } +} + +#endif//SkSemaphore_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkSpan_impl.h b/gfx/skia/skia/include/private/base/SkSpan_impl.h new file mode 100644 index 0000000000..5f31a651bb --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkSpan_impl.h @@ -0,0 +1,129 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSpan_DEFINED +#define SkSpan_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTo.h" + +#include +#include +#include +#include +#include + +// Having this be an export works around IWYU churn related to +// https://github.com/include-what-you-use/include-what-you-use/issues/1121 +#include // IWYU pragma: export + +// Add macro to check the lifetime of initializer_list arguments. initializer_list has a very +// short life span, and can only be used as a parameter, and not as a variable. +#if defined(__clang__) && defined(__has_cpp_attribute) && __has_cpp_attribute(clang::lifetimebound) +#define SK_CHECK_IL_LIFETIME [[clang::lifetimebound]] +#else +#define SK_CHECK_IL_LIFETIME +#endif + +/** + * SkSpan holds a reference to contiguous data of type T along with a count. SkSpan does not own + * the data itself but is merely a reference, therefore you must take care with the lifetime of + * the underlying data. + * + * SkSpan is a count and a pointer into existing array or data type that stores its data in + * contiguous memory like std::vector. Any container that works with std::size() and std::data() + * can be used. + * + * SkSpan makes a convenient parameter for a routine to accept array like things. This allows you to + * write the routine without overloads for all different container types. + * + * Example: + * void routine(SkSpan a) { ... } + * + * std::vector v = {1, 2, 3, 4, 5}; + * + * routine(a); + * + * A word of caution when working with initializer_list, initializer_lists have a lifetime that is + * limited to the current statement. The following is correct and safe: + * + * Example: + * routine({1,2,3,4,5}); + * + * The following is undefined, and will result in erratic execution: + * + * Bad Example: + * initializer_list l = {1, 2, 3, 4, 5}; // The data behind l dies at the ;. + * routine(l); + */ +template +class SkSpan { +public: + constexpr SkSpan() : fPtr{nullptr}, fSize{0} {} + + template , bool> = true> + constexpr SkSpan(T* ptr, Integer size) : fPtr{ptr}, fSize{SkToSizeT(size)} { + SkASSERT(ptr || fSize == 0); // disallow nullptr + a nonzero size + SkASSERT(fSize < kMaxSize); + } + template >> + constexpr SkSpan(const SkSpan& that) : fPtr(std::data(that)), fSize(std::size(that)) {} + constexpr SkSpan(const SkSpan& o) = default; + template constexpr SkSpan(T(&a)[N]) : SkSpan(a, N) { } + template + constexpr SkSpan(Container& c) : SkSpan(std::data(c), std::size(c)) { } + SkSpan(std::initializer_list il SK_CHECK_IL_LIFETIME) + : SkSpan(std::data(il), std::size(il)) {} + + constexpr SkSpan& operator=(const SkSpan& that) = default; + + constexpr T& operator [] (size_t i) const { + SkASSERT(i < this->size()); + return fPtr[i]; + } + constexpr T& front() const { return fPtr[0]; } + constexpr T& back() const { return fPtr[fSize - 1]; } + constexpr T* begin() const { return fPtr; } + constexpr T* end() const { return fPtr + fSize; } + constexpr auto rbegin() const { return std::make_reverse_iterator(this->end()); } + constexpr auto rend() const { return std::make_reverse_iterator(this->begin()); } + constexpr T* data() const { return this->begin(); } + constexpr size_t size() const { return fSize; } + constexpr bool empty() const { return fSize == 0; } + constexpr size_t size_bytes() const { return fSize * sizeof(T); } + constexpr SkSpan first(size_t prefixLen) const { + SkASSERT(prefixLen <= this->size()); + return SkSpan{fPtr, prefixLen}; + } + constexpr SkSpan last(size_t postfixLen) const { + SkASSERT(postfixLen <= this->size()); + return SkSpan{fPtr + (this->size() - postfixLen), postfixLen}; + } + constexpr SkSpan subspan(size_t offset) const { + return this->subspan(offset, this->size() - offset); + } + constexpr SkSpan subspan(size_t offset, size_t count) const { + SkASSERT(offset <= this->size()); + SkASSERT(count <= this->size() - offset); + return SkSpan{fPtr + offset, count}; + } + +private: + static const constexpr size_t kMaxSize = std::numeric_limits::max() / sizeof(T); + T* fPtr; + size_t fSize; +}; + +template +SkSpan(Container&) -> + SkSpan()))>>; + +template +SkSpan(std::initializer_list) -> + SkSpan>()))>>; + +#endif // SkSpan_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkTArray.h b/gfx/skia/skia/include/private/base/SkTArray.h new file mode 100644 index 0000000000..635d04e2a8 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTArray.h @@ -0,0 +1,696 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTArray_DEFINED +#define SkTArray_DEFINED + +#include "include/private/base/SkAlignedStorage.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkAttributes.h" +#include "include/private/base/SkContainers.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkSpan_impl.h" +#include "include/private/base/SkTo.h" +#include "include/private/base/SkTypeTraits.h" // IWYU pragma: keep + +#include +#include +#include +#include +#include +#include +#include +#include + +namespace skia_private { +/** TArray implements a typical, mostly std::vector-like array. + Each T will be default-initialized on allocation, and ~T will be called on destruction. + + MEM_MOVE controls the behavior when a T needs to be moved (e.g. when the array is resized) + - true: T will be bit-copied via memcpy. + - false: T will be moved via move-constructors. +*/ +template > class TArray { +public: + using value_type = T; + + /** + * Creates an empty array with no initial storage + */ + TArray() : fOwnMemory(true), fCapacity{0} {} + + /** + * Creates an empty array that will preallocate space for reserveCount + * elements. + */ + explicit TArray(int reserveCount) : TArray() { this->reserve_back(reserveCount); } + + /** + * Copies one array to another. The new array will be heap allocated. + */ + TArray(const TArray& that) : TArray(that.fData, that.fSize) {} + + TArray(TArray&& that) { + if (that.fOwnMemory) { + this->setData(that); + that.setData({}); + } else { + this->initData(that.fSize); + that.move(fData); + } + fSize = std::exchange(that.fSize, 0); + } + + /** + * Creates a TArray by copying contents of a standard C array. The new + * array will be heap allocated. Be careful not to use this constructor + * when you really want the (void*, int) version. + */ + TArray(const T* array, int count) { + this->initData(count); + this->copy(array); + } + + /** + * Creates a TArray by copying contents of an initializer list. + */ + TArray(std::initializer_list data) : TArray(data.begin(), data.size()) {} + + TArray& operator=(const TArray& that) { + if (this == &that) { + return *this; + } + this->clear(); + this->checkRealloc(that.size(), kExactFit); + fSize = that.fSize; + this->copy(that.fData); + return *this; + } + TArray& operator=(TArray&& that) { + if (this != &that) { + this->clear(); + if (that.fOwnMemory) { + // The storage is on the heap, so move the data pointer. + if (fOwnMemory) { + sk_free(fData); + } + + fData = std::exchange(that.fData, nullptr); + + // Can't use exchange with bitfields. + fCapacity = that.fCapacity; + that.fCapacity = 0; + + fOwnMemory = true; + } else { + // The data is stored inline in that, so move it element-by-element. + this->checkRealloc(that.size(), kExactFit); + that.move(fData); + } + fSize = std::exchange(that.fSize, 0); + } + return *this; + } + + ~TArray() { + this->destroyAll(); + if (fOwnMemory) { + sk_free(fData); + } + } + + /** + * Resets to size() = n newly constructed T objects and resets any reserve count. + */ + void reset(int n) { + SkASSERT(n >= 0); + this->clear(); + this->checkRealloc(n, kExactFit); + fSize = n; + for (int i = 0; i < this->size(); ++i) { + new (fData + i) T; + } + } + + /** + * Resets to a copy of a C array and resets any reserve count. + */ + void reset(const T* array, int count) { + SkASSERT(count >= 0); + this->clear(); + this->checkRealloc(count, kExactFit); + fSize = count; + this->copy(array); + } + + /** + * Ensures there is enough reserved space for n elements. + */ + void reserve(int n) { + SkASSERT(n >= 0); + if (n > this->size()) { + this->checkRealloc(n - this->size(), kGrowing); + } + } + + /** + * Ensures there is enough reserved space for n additional elements. The is guaranteed at least + * until the array size grows above n and subsequently shrinks below n, any version of reset() + * is called, or reserve_back() is called again. + */ + void reserve_back(int n) { + SkASSERT(n >= 0); + if (n > 0) { + this->checkRealloc(n, kExactFit); + } + } + + void removeShuffle(int n) { + SkASSERT(n < this->size()); + int newCount = fSize - 1; + fSize = newCount; + fData[n].~T(); + if (n != newCount) { + this->move(n, newCount); + } + } + + // Is the array empty. + bool empty() const { return fSize == 0; } + + /** + * Adds 1 new default-initialized T value and returns it by reference. Note + * the reference only remains valid until the next call that adds or removes + * elements. + */ + T& push_back() { + void* newT = this->push_back_raw(1); + return *new (newT) T; + } + + /** + * Version of above that uses a copy constructor to initialize the new item + */ + T& push_back(const T& t) { + void* newT = this->push_back_raw(1); + return *new (newT) T(t); + } + + /** + * Version of above that uses a move constructor to initialize the new item + */ + T& push_back(T&& t) { + void* newT = this->push_back_raw(1); + return *new (newT) T(std::move(t)); + } + + /** + * Construct a new T at the back of this array. + */ + template T& emplace_back(Args&&... args) { + void* newT = this->push_back_raw(1); + return *new (newT) T(std::forward(args)...); + } + + /** + * Allocates n more default-initialized T values, and returns the address of + * the start of that new range. Note: this address is only valid until the + * next API call made on the array that might add or remove elements. + */ + T* push_back_n(int n) { + SkASSERT(n >= 0); + T* newTs = TCast(this->push_back_raw(n)); + for (int i = 0; i < n; ++i) { + new (&newTs[i]) T; + } + return newTs; + } + + /** + * Version of above that uses a copy constructor to initialize all n items + * to the same T. + */ + T* push_back_n(int n, const T& t) { + SkASSERT(n >= 0); + T* newTs = TCast(this->push_back_raw(n)); + for (int i = 0; i < n; ++i) { + new (&newTs[i]) T(t); + } + return static_cast(newTs); + } + + /** + * Version of above that uses a copy constructor to initialize the n items + * to separate T values. + */ + T* push_back_n(int n, const T t[]) { + SkASSERT(n >= 0); + this->checkRealloc(n, kGrowing); + T* end = this->end(); + for (int i = 0; i < n; ++i) { + new (end + i) T(t[i]); + } + fSize += n; + return end; + } + + /** + * Version of above that uses the move constructor to set n items. + */ + T* move_back_n(int n, T* t) { + SkASSERT(n >= 0); + this->checkRealloc(n, kGrowing); + T* end = this->end(); + for (int i = 0; i < n; ++i) { + new (end + i) T(std::move(t[i])); + } + fSize += n; + return end; + } + + /** + * Removes the last element. Not safe to call when size() == 0. + */ + void pop_back() { + SkASSERT(fSize > 0); + --fSize; + fData[fSize].~T(); + } + + /** + * Removes the last n elements. Not safe to call when size() < n. + */ + void pop_back_n(int n) { + SkASSERT(n >= 0); + SkASSERT(this->size() >= n); + int i = fSize; + while (i-- > fSize - n) { + (*this)[i].~T(); + } + fSize -= n; + } + + /** + * Pushes or pops from the back to resize. Pushes will be default + * initialized. + */ + void resize_back(int newCount) { + SkASSERT(newCount >= 0); + + if (newCount > this->size()) { + this->push_back_n(newCount - fSize); + } else if (newCount < this->size()) { + this->pop_back_n(fSize - newCount); + } + } + + /** Swaps the contents of this array with that array. Does a pointer swap if possible, + otherwise copies the T values. */ + void swap(TArray& that) { + using std::swap; + if (this == &that) { + return; + } + if (fOwnMemory && that.fOwnMemory) { + swap(fData, that.fData); + swap(fSize, that.fSize); + + // Can't use swap because fCapacity is a bit field. + auto allocCount = fCapacity; + fCapacity = that.fCapacity; + that.fCapacity = allocCount; + } else { + // This could be more optimal... + TArray copy(std::move(that)); + that = std::move(*this); + *this = std::move(copy); + } + } + + T* begin() { + return fData; + } + const T* begin() const { + return fData; + } + + // It's safe to use fItemArray + fSize because if fItemArray is nullptr then adding 0 is + // valid and returns nullptr. See [expr.add] in the C++ standard. + T* end() { + if (fData == nullptr) { + SkASSERT(fSize == 0); + } + return fData + fSize; + } + const T* end() const { + if (fData == nullptr) { + SkASSERT(fSize == 0); + } + return fData + fSize; + } + T* data() { return fData; } + const T* data() const { return fData; } + int size() const { return fSize; } + size_t size_bytes() const { return this->bytes(fSize); } + void resize(size_t count) { this->resize_back((int)count); } + + void clear() { + this->destroyAll(); + fSize = 0; + } + + void shrink_to_fit() { + if (!fOwnMemory || fSize == fCapacity) { + return; + } + if (fSize == 0) { + sk_free(fData); + fData = nullptr; + fCapacity = 0; + } else { + SkSpan allocation = Allocate(fSize); + this->move(TCast(allocation.data())); + if (fOwnMemory) { + sk_free(fData); + } + this->setDataFromBytes(allocation); + } + } + + /** + * Get the i^th element. + */ + T& operator[] (int i) { + SkASSERT(i < this->size()); + SkASSERT(i >= 0); + return fData[i]; + } + + const T& operator[] (int i) const { + SkASSERT(i < this->size()); + SkASSERT(i >= 0); + return fData[i]; + } + + T& at(int i) { return (*this)[i]; } + const T& at(int i) const { return (*this)[i]; } + + /** + * equivalent to operator[](0) + */ + T& front() { SkASSERT(fSize > 0); return fData[0];} + + const T& front() const { SkASSERT(fSize > 0); return fData[0];} + + /** + * equivalent to operator[](size() - 1) + */ + T& back() { SkASSERT(fSize); return fData[fSize - 1];} + + const T& back() const { SkASSERT(fSize > 0); return fData[fSize - 1];} + + /** + * equivalent to operator[](size()-1-i) + */ + T& fromBack(int i) { + SkASSERT(i >= 0); + SkASSERT(i < this->size()); + return fData[fSize - i - 1]; + } + + const T& fromBack(int i) const { + SkASSERT(i >= 0); + SkASSERT(i < this->size()); + return fData[fSize - i - 1]; + } + + bool operator==(const TArray& right) const { + int leftCount = this->size(); + if (leftCount != right.size()) { + return false; + } + for (int index = 0; index < leftCount; ++index) { + if (fData[index] != right.fData[index]) { + return false; + } + } + return true; + } + + bool operator!=(const TArray& right) const { + return !(*this == right); + } + + int capacity() const { + return fCapacity; + } + +protected: + // Creates an empty array that will use the passed storage block until it is insufficiently + // large to hold the entire array. + template + TArray(SkAlignedSTStorage* storage, int size = 0) { + static_assert(InitialCapacity >= 0); + SkASSERT(size >= 0); + SkASSERT(storage->get() != nullptr); + if (size > InitialCapacity) { + this->initData(size); + } else { + this->setDataFromBytes(*storage); + fSize = size; + + // setDataFromBytes always sets fOwnMemory to true, but we are actually using static + // storage here, which shouldn't ever be freed. + fOwnMemory = false; + } + } + + // Copy a C array, using pre-allocated storage if preAllocCount >= count. Otherwise, storage + // will only be used when array shrinks to fit. + template + TArray(const T* array, int size, SkAlignedSTStorage* storage) + : TArray{storage, size} + { + this->copy(array); + } + +private: + // Growth factors for checkRealloc. + static constexpr double kExactFit = 1.0; + static constexpr double kGrowing = 1.5; + + static constexpr int kMinHeapAllocCount = 8; + static_assert(SkIsPow2(kMinHeapAllocCount), "min alloc count not power of two."); + + // Note for 32-bit machines kMaxCapacity will be <= SIZE_MAX. For 64-bit machines it will + // just be INT_MAX if the sizeof(T) < 2^32. + static constexpr int kMaxCapacity = SkToInt(std::min(SIZE_MAX / sizeof(T), (size_t)INT_MAX)); + + void setDataFromBytes(SkSpan allocation) { + T* data = TCast(allocation.data()); + // We have gotten extra bytes back from the allocation limit, pin to kMaxCapacity. It + // would seem like the SkContainerAllocator should handle the divide, but it would have + // to a full divide instruction. If done here the size is known at compile, and usually + // can be implemented by a right shift. The full divide takes ~50X longer than the shift. + size_t size = std::min(allocation.size() / sizeof(T), SkToSizeT(kMaxCapacity)); + setData(SkSpan(data, size)); + } + + void setData(SkSpan array) { + fData = array.data(); + fCapacity = SkToU32(array.size()); + fOwnMemory = true; + } + + // We disable Control-Flow Integrity sanitization (go/cfi) when casting item-array buffers. + // CFI flags this code as dangerous because we are casting `buffer` to a T* while the buffer's + // contents might still be uninitialized memory. When T has a vtable, this is especially risky + // because we could hypothetically access a virtual method on fItemArray and jump to an + // unpredictable location in memory. Of course, TArray won't actually use fItemArray in this + // way, and we don't want to construct a T before the user requests one. There's no real risk + // here, so disable CFI when doing these casts. +#ifdef __clang__ + SK_NO_SANITIZE("cfi") +#elif defined(__GNUC__) + SK_ATTRIBUTE(no_sanitize_undefined) +#endif + static T* TCast(void* buffer) { + return (T*)buffer; + } + + size_t bytes(int n) const { + SkASSERT(n <= kMaxCapacity); + return SkToSizeT(n) * sizeof(T); + } + + static SkSpan Allocate(int capacity, double growthFactor = 1.0) { + return SkContainerAllocator{sizeof(T), kMaxCapacity}.allocate(capacity, growthFactor); + } + + void initData(int count) { + this->setDataFromBytes(Allocate(count)); + fSize = count; + } + + void destroyAll() { + if (!this->empty()) { + T* cursor = this->begin(); + T* const end = this->end(); + do { + cursor->~T(); + cursor++; + } while (cursor < end); + } + } + + /** In the following move and copy methods, 'dst' is assumed to be uninitialized raw storage. + * In the following move methods, 'src' is destroyed leaving behind uninitialized raw storage. + */ + void copy(const T* src) { + if constexpr (std::is_trivially_copyable_v) { + if (!this->empty() && src != nullptr) { + sk_careful_memcpy(fData, src, this->size_bytes()); + } + } else { + for (int i = 0; i < this->size(); ++i) { + new (fData + i) T(src[i]); + } + } + } + + void move(int dst, int src) { + if constexpr (MEM_MOVE) { + memcpy(static_cast(&fData[dst]), + static_cast(&fData[src]), + sizeof(T)); + } else { + new (&fData[dst]) T(std::move(fData[src])); + fData[src].~T(); + } + } + + void move(void* dst) { + if constexpr (MEM_MOVE) { + sk_careful_memcpy(dst, fData, this->bytes(fSize)); + } else { + for (int i = 0; i < this->size(); ++i) { + new (static_cast(dst) + this->bytes(i)) T(std::move(fData[i])); + fData[i].~T(); + } + } + } + + // Helper function that makes space for n objects, adjusts the count, but does not initialize + // the new objects. + void* push_back_raw(int n) { + this->checkRealloc(n, kGrowing); + void* ptr = fData + fSize; + fSize += n; + return ptr; + } + + void checkRealloc(int delta, double growthFactor) { + // This constant needs to be declared in the function where it is used to work around + // MSVC's persnickety nature about template definitions. + SkASSERT(delta >= 0); + SkASSERT(fSize >= 0); + SkASSERT(fCapacity >= 0); + + // Return if there are enough remaining allocated elements to satisfy the request. + if (this->capacity() - fSize >= delta) { + return; + } + + // Don't overflow fSize or size_t later in the memory allocation. Overflowing memory + // allocation really only applies to fSizes on 32-bit machines; on 64-bit machines this + // will probably never produce a check. Since kMaxCapacity is bounded above by INT_MAX, + // this also checks the bounds of fSize. + if (delta > kMaxCapacity - fSize) { + sk_report_container_overflow_and_die(); + } + const int newCount = fSize + delta; + + SkSpan allocation = Allocate(newCount, growthFactor); + + this->move(TCast(allocation.data())); + if (fOwnMemory) { + sk_free(fData); + } + this->setDataFromBytes(allocation); + SkASSERT(this->capacity() >= newCount); + SkASSERT(fData != nullptr); + } + + T* fData{nullptr}; + int fSize{0}; + uint32_t fOwnMemory : 1; + uint32_t fCapacity : 31; +}; + +template static inline void swap(TArray& a, TArray& b) { + a.swap(b); +} + +} // namespace skia_private + +/** + * Subclass of TArray that contains a preallocated memory block for the array. + */ +template > +class SkSTArray : private SkAlignedSTStorage, public skia_private::TArray { +private: + static_assert(N > 0); + using STORAGE = SkAlignedSTStorage; + using INHERITED = skia_private::TArray; + +public: + SkSTArray() + : STORAGE{}, INHERITED(static_cast(this)) {} + + SkSTArray(const T* array, int count) + : STORAGE{}, INHERITED(array, count, static_cast(this)) {} + + SkSTArray(std::initializer_list data) : SkSTArray(data.begin(), SkToInt(data.size())) {} + + explicit SkSTArray(int reserveCount) : SkSTArray() { + this->reserve_back(reserveCount); + } + + SkSTArray (const SkSTArray& that) : SkSTArray() { *this = that; } + explicit SkSTArray(const INHERITED& that) : SkSTArray() { *this = that; } + SkSTArray ( SkSTArray&& that) : SkSTArray() { *this = std::move(that); } + explicit SkSTArray( INHERITED&& that) : SkSTArray() { *this = std::move(that); } + + SkSTArray& operator=(const SkSTArray& that) { + INHERITED::operator=(that); + return *this; + } + SkSTArray& operator=(const INHERITED& that) { + INHERITED::operator=(that); + return *this; + } + + SkSTArray& operator=(SkSTArray&& that) { + INHERITED::operator=(std::move(that)); + return *this; + } + SkSTArray& operator=(INHERITED&& that) { + INHERITED::operator=(std::move(that)); + return *this; + } + + // Force the use of TArray for data() and size(). + using INHERITED::data; + using INHERITED::size; +}; + +// TODO: remove this typedef when all uses have been converted from SkTArray to TArray. +template > +using SkTArray = skia_private::TArray; + +#endif diff --git a/gfx/skia/skia/include/private/base/SkTDArray.h b/gfx/skia/skia/include/private/base/SkTDArray.h new file mode 100644 index 0000000000..b08d285378 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTDArray.h @@ -0,0 +1,236 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTDArray_DEFINED +#define SkTDArray_DEFINED + +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTo.h" + +#include +#include +#include + +class SK_SPI SkTDStorage { +public: + explicit SkTDStorage(int sizeOfT); + SkTDStorage(const void* src, int size, int sizeOfT); + + // Copy + SkTDStorage(const SkTDStorage& that); + SkTDStorage& operator= (const SkTDStorage& that); + + // Move + SkTDStorage(SkTDStorage&& that); + SkTDStorage& operator= (SkTDStorage&& that); + + ~SkTDStorage(); + + void reset(); + void swap(SkTDStorage& that); + + // Size routines + bool empty() const { return fSize == 0; } + void clear() { fSize = 0; } + int size() const { return fSize; } + void resize(int newSize); + size_t size_bytes() const { return this->bytes(fSize); } + + // Capacity routines + int capacity() const { return fCapacity; } + void reserve(int newCapacity); + void shrink_to_fit(); + + void* data() { return fStorage; } + const void* data() const { return fStorage; } + + // Deletion routines + void erase(int index, int count); + // Removes the entry at 'index' and replaces it with the last array element + void removeShuffle(int index); + + // Insertion routines + void* prepend(); + + void append(); + void append(int count); + void* append(const void* src, int count); + + void* insert(int index); + void* insert(int index, int count, const void* src); + + void pop_back() { + SkASSERT(fSize > 0); + fSize--; + } + + friend bool operator==(const SkTDStorage& a, const SkTDStorage& b); + friend bool operator!=(const SkTDStorage& a, const SkTDStorage& b) { + return !(a == b); + } + +private: + size_t bytes(int n) const { return SkToSizeT(n * fSizeOfT); } + void* address(int n) { return fStorage + this->bytes(n); } + + // Adds delta to fSize. Crash if outside [0, INT_MAX] + int calculateSizeOrDie(int delta); + + // Move the tail of the array defined by the indexes tailStart and tailEnd to dstIndex. The + // elements at dstIndex are overwritten by the tail. + void moveTail(int dstIndex, int tailStart, int tailEnd); + + // Copy src into the array at dstIndex. + void copySrc(int dstIndex, const void* src, int count); + + const int fSizeOfT; + std::byte* fStorage{nullptr}; + int fCapacity{0}; // size of the allocation in fArray (#elements) + int fSize{0}; // logical number of elements (fSize <= fCapacity) +}; + +static inline void swap(SkTDStorage& a, SkTDStorage& b) { + a.swap(b); +} + +// SkTDArray implements a std::vector-like array for raw data-only objects that do not require +// construction or destruction. The constructor and destructor for T will not be called; T objects +// will always be moved via raw memcpy. Newly created T objects will contain uninitialized memory. +template class SkTDArray { +public: + SkTDArray() : fStorage{sizeof(T)} {} + SkTDArray(const T src[], int count) : fStorage{src, count, sizeof(T)} { } + SkTDArray(const std::initializer_list& list) : SkTDArray(list.begin(), list.size()) {} + + // Copy + SkTDArray(const SkTDArray& src) : SkTDArray(src.data(), src.size()) {} + SkTDArray& operator=(const SkTDArray& src) { + fStorage = src.fStorage; + return *this; + } + + // Move + SkTDArray(SkTDArray&& src) : fStorage{std::move(src.fStorage)} {} + SkTDArray& operator=(SkTDArray&& src) { + fStorage = std::move(src.fStorage); + return *this; + } + + friend bool operator==(const SkTDArray& a, const SkTDArray& b) { + return a.fStorage == b.fStorage; + } + friend bool operator!=(const SkTDArray& a, const SkTDArray& b) { return !(a == b); } + + void swap(SkTDArray& that) { + using std::swap; + swap(fStorage, that.fStorage); + } + + bool empty() const { return fStorage.empty(); } + + // Return the number of elements in the array + int size() const { return fStorage.size(); } + + // Return the total number of elements allocated. + // Note: capacity() - size() gives you the number of elements you can add without causing an + // allocation. + int capacity() const { return fStorage.capacity(); } + + // return the number of bytes in the array: count * sizeof(T) + size_t size_bytes() const { return fStorage.size_bytes(); } + + T* data() { return static_cast(fStorage.data()); } + const T* data() const { return static_cast(fStorage.data()); } + T* begin() { return this->data(); } + const T* begin() const { return this->data(); } + T* end() { return this->data() + this->size(); } + const T* end() const { return this->data() + this->size(); } + + T& operator[](int index) { + SkASSERT(index < this->size()); + return this->data()[index]; + } + const T& operator[](int index) const { + SkASSERT(index < this->size()); + return this->data()[index]; + } + + const T& back() const { + SkASSERT(this->size() > 0); + return this->data()[this->size() - 1]; + } + T& back() { + SkASSERT(this->size() > 0); + return this->data()[this->size() - 1]; + } + + void reset() { + fStorage.reset(); + } + + void clear() { + fStorage.clear(); + } + + // Sets the number of elements in the array. + // If the array does not have space for count elements, it will increase + // the storage allocated to some amount greater than that required. + // It will never shrink the storage. + void resize(int count) { + fStorage.resize(count); + } + + void reserve(int n) { + fStorage.reserve(n); + } + + T* append() { + fStorage.append(); + return this->end() - 1; + } + T* append(int count) { + fStorage.append(count); + return this->end() - count; + } + T* append(int count, const T* src) { + return static_cast(fStorage.append(src, count)); + } + + T* insert(int index) { + return static_cast(fStorage.insert(index)); + } + T* insert(int index, int count, const T* src = nullptr) { + return static_cast(fStorage.insert(index, count, src)); + } + + void remove(int index, int count = 1) { + fStorage.erase(index, count); + } + + void removeShuffle(int index) { + fStorage.removeShuffle(index); + } + + // routines to treat the array like a stack + void push_back(const T& v) { + this->append(); + this->back() = v; + } + void pop_back() { fStorage.pop_back(); } + + void shrink_to_fit() { + fStorage.shrink_to_fit(); + } + +private: + SkTDStorage fStorage; +}; + +template static inline void swap(SkTDArray& a, SkTDArray& b) { a.swap(b); } + +#endif diff --git a/gfx/skia/skia/include/private/base/SkTFitsIn.h b/gfx/skia/skia/include/private/base/SkTFitsIn.h new file mode 100644 index 0000000000..365748abef --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTFitsIn.h @@ -0,0 +1,105 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTFitsIn_DEFINED +#define SkTFitsIn_DEFINED + +#include "include/private/base/SkDebug.h" + +#include +#include +#include + +/** + * std::underlying_type is only defined for enums. For integral types, we just want the type. + */ +template +struct sk_strip_enum { + typedef T type; +}; + +template +struct sk_strip_enum::value>::type> { + typedef typename std::underlying_type::type type; +}; + + +/** + * In C++ an unsigned to signed cast where the source value cannot be represented in the destination + * type results in an implementation defined destination value. Unlike C, C++ does not allow a trap. + * This makes "(S)(D)s == s" a possibly useful test. However, there are two cases where this is + * incorrect: + * + * when testing if a value of a smaller signed type can be represented in a larger unsigned type + * (int8_t)(uint16_t)-1 == -1 => (int8_t)0xFFFF == -1 => [implementation defined] == -1 + * + * when testing if a value of a larger unsigned type can be represented in a smaller signed type + * (uint16_t)(int8_t)0xFFFF == 0xFFFF => (uint16_t)-1 == 0xFFFF => 0xFFFF == 0xFFFF => true. + * + * Consider the cases: + * u = unsigned, less digits + * U = unsigned, more digits + * s = signed, less digits + * S = signed, more digits + * v is the value we're considering. + * + * u -> U: (u)(U)v == v, trivially true + * U -> u: (U)(u)v == v, both casts well defined, test works + * s -> S: (s)(S)v == v, trivially true + * S -> s: (S)(s)v == v, first cast implementation value, second cast defined, test works + * s -> U: (s)(U)v == v, *this is bad*, the second cast results in implementation defined value + * S -> u: (S)(u)v == v, the second cast is required to prevent promotion of rhs to unsigned + * u -> S: (u)(S)v == v, trivially true + * U -> s: (U)(s)v == v, *this is bad*, + * first cast results in implementation defined value, + * second cast is defined. However, this creates false positives + * uint16_t x = 0xFFFF + * (uint16_t)(int8_t)x == x + * => (uint16_t)-1 == x + * => 0xFFFF == x + * => true + * + * So for the eight cases three are trivially true, three more are valid casts, and two are special. + * The two 'full' checks which otherwise require two comparisons are valid cast checks. + * The two remaining checks s -> U [v >= 0] and U -> s [v <= max(s)] can be done with one op. + */ + +template +static constexpr inline +typename std::enable_if<(std::is_integral::value || std::is_enum::value) && + (std::is_integral::value || std::is_enum::value), bool>::type +/*bool*/ SkTFitsIn(S src) { + // Ensure that is_signed and is_unsigned are passed the arithmetic underlyng types of enums. + using Sa = typename sk_strip_enum::type; + using Da = typename sk_strip_enum::type; + + // SkTFitsIn() is used in public headers, so needs to be written targeting at most C++11. + return + + // E.g. (int8_t)(uint8_t) int8_t(-1) == -1, but the uint8_t == 255, not -1. + (std::is_signed::value && std::is_unsigned::value && sizeof(Sa) <= sizeof(Da)) ? + (S)0 <= src : + + // E.g. (uint8_t)(int8_t) uint8_t(255) == 255, but the int8_t == -1. + (std::is_signed::value && std::is_unsigned::value && sizeof(Da) <= sizeof(Sa)) ? + src <= (S)std::numeric_limits::max() : + +#if !defined(SK_DEBUG) && !defined(__MSVC_RUNTIME_CHECKS ) + // Correct (simple) version. This trips up MSVC's /RTCc run-time checking. + (S)(D)src == src; +#else + // More complex version that's safe with /RTCc. Used in all debug builds, for coverage. + (std::is_signed::value) ? + (intmax_t)src >= (intmax_t)std::numeric_limits::min() && + (intmax_t)src <= (intmax_t)std::numeric_limits::max() : + + // std::is_unsigned ? + (uintmax_t)src <= (uintmax_t)std::numeric_limits::max(); +#endif +} + +#endif diff --git a/gfx/skia/skia/include/private/base/SkTLogic.h b/gfx/skia/skia/include/private/base/SkTLogic.h new file mode 100644 index 0000000000..26f363c946 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTLogic.h @@ -0,0 +1,56 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * + * This header provides some std:: features early in the skstd namespace + * and several Skia-specific additions in the sknonstd namespace. + */ + +#ifndef SkTLogic_DEFINED +#define SkTLogic_DEFINED + +#include +#include +#include "include/private/base/SkTo.h" + +// The sknonstd namespace contains things we would like to be proposed and feel std-ish. +namespace sknonstd { + +// The name 'copy' here is fraught with peril. In this case it means 'append', not 'overwrite'. +// Alternate proposed names are 'propagate', 'augment', or 'append' (and 'add', but already taken). +// std::experimental::propagate_const already exists for other purposes in TSv2. +// These also follow the pattern used by boost. +template struct copy_const { + using type = std::conditional_t::value, std::add_const_t, D>; +}; +template using copy_const_t = typename copy_const::type; + +template struct copy_volatile { + using type = std::conditional_t::value, std::add_volatile_t, D>; +}; +template using copy_volatile_t = typename copy_volatile::type; + +template struct copy_cv { + using type = copy_volatile_t, S>; +}; +template using copy_cv_t = typename copy_cv::type; + +// The name 'same' here means 'overwrite'. +// Alternate proposed names are 'replace', 'transfer', or 'qualify_from'. +// same_xxx can be written as copy_xxx, S> +template using same_const = copy_const, S>; +template using same_const_t = typename same_const::type; +template using same_volatile =copy_volatile,S>; +template using same_volatile_t = typename same_volatile::type; +template using same_cv = copy_cv, S>; +template using same_cv_t = typename same_cv::type; + +} // namespace sknonstd + +template +constexpr int SkCount(const Container& c) { return SkTo(std::size(c)); } + +#endif diff --git a/gfx/skia/skia/include/private/base/SkTPin.h b/gfx/skia/skia/include/private/base/SkTPin.h new file mode 100644 index 0000000000..c824c44640 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTPin.h @@ -0,0 +1,23 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTPin_DEFINED +#define SkTPin_DEFINED + +#include + +/** @return x pinned (clamped) between lo and hi, inclusively. + + Unlike std::clamp(), SkTPin() always returns a value between lo and hi. + If x is NaN, SkTPin() returns lo but std::clamp() returns NaN. +*/ +template +static constexpr const T& SkTPin(const T& x, const T& lo, const T& hi) { + return std::max(lo, std::min(x, hi)); +} + +#endif diff --git a/gfx/skia/skia/include/private/base/SkTemplates.h b/gfx/skia/skia/include/private/base/SkTemplates.h new file mode 100644 index 0000000000..cbcf36c594 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTemplates.h @@ -0,0 +1,426 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTemplates_DEFINED +#define SkTemplates_DEFINED + +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTLogic.h" + +#include +#include +#include +#include +#include +#include +#include + + +/** \file SkTemplates.h + + This file contains light-weight template classes for type-safe and exception-safe + resource management. +*/ + +/** + * Marks a local variable as known to be unused (to avoid warnings). + * Note that this does *not* prevent the local variable from being optimized away. + */ +template inline void sk_ignore_unused_variable(const T&) { } + +/** + * This is a general purpose absolute-value function. + * See SkAbs32 in (SkSafe32.h) for a 32-bit int specific version that asserts. + */ +template static inline T SkTAbs(T value) { + if (value < 0) { + value = -value; + } + return value; +} + +/** + * Returns a pointer to a D which comes immediately after S[count]. + */ +template inline D* SkTAfter(S* ptr, size_t count = 1) { + return reinterpret_cast(ptr + count); +} + +/** + * Returns a pointer to a D which comes byteOffset bytes after S. + */ +template inline D* SkTAddOffset(S* ptr, ptrdiff_t byteOffset) { + // The intermediate char* has the same cv-ness as D as this produces better error messages. + // This relies on the fact that reinterpret_cast can add constness, but cannot remove it. + return reinterpret_cast(reinterpret_cast*>(ptr) + byteOffset); +} + +template struct SkOverloadedFunctionObject { + template + auto operator()(Args&&... args) const -> decltype(P(std::forward(args)...)) { + return P(std::forward(args)...); + } +}; + +template using SkFunctionObject = + SkOverloadedFunctionObject, F>; + +/** \class SkAutoTCallVProc + + Call a function when this goes out of scope. The template uses two + parameters, the object, and a function that is to be called in the destructor. + If release() is called, the object reference is set to null. If the object + reference is null when the destructor is called, we do not call the + function. +*/ +template class SkAutoTCallVProc + : public std::unique_ptr> { + using inherited = std::unique_ptr>; +public: + using inherited::inherited; + SkAutoTCallVProc(const SkAutoTCallVProc&) = delete; + SkAutoTCallVProc(SkAutoTCallVProc&& that) : inherited(std::move(that)) {} + + operator T*() const { return this->get(); } +}; + + +namespace skia_private { +/** Allocate an array of T elements, and free the array in the destructor + */ +template class AutoTArray { +public: + AutoTArray() {} + /** Allocate count number of T elements + */ + explicit AutoTArray(int count) { + SkASSERT(count >= 0); + if (count) { + fArray.reset(new T[count]); + } + SkDEBUGCODE(fCount = count;) + } + + AutoTArray(AutoTArray&& other) : fArray(std::move(other.fArray)) { + SkDEBUGCODE(fCount = other.fCount; other.fCount = 0;) + } + AutoTArray& operator=(AutoTArray&& other) { + if (this != &other) { + fArray = std::move(other.fArray); + SkDEBUGCODE(fCount = other.fCount; other.fCount = 0;) + } + return *this; + } + + /** Reallocates given a new count. Reallocation occurs even if new count equals old count. + */ + void reset(int count = 0) { *this = AutoTArray(count); } + + /** Return the array of T elements. Will be NULL if count == 0 + */ + T* get() const { return fArray.get(); } + + /** Return the nth element in the array + */ + T& operator[](int index) const { + SkASSERT((unsigned)index < (unsigned)fCount); + return fArray[index]; + } + + /** Aliases matching other types, like std::vector. */ + const T* data() const { return fArray.get(); } + T* data() { return fArray.get(); } + +private: + std::unique_ptr fArray; + SkDEBUGCODE(int fCount = 0;) +}; + +/** Wraps AutoTArray, with room for kCountRequested elements preallocated. + */ +template class AutoSTArray { +public: + AutoSTArray(AutoSTArray&&) = delete; + AutoSTArray(const AutoSTArray&) = delete; + AutoSTArray& operator=(AutoSTArray&&) = delete; + AutoSTArray& operator=(const AutoSTArray&) = delete; + + /** Initialize with no objects */ + AutoSTArray() { + fArray = nullptr; + fCount = 0; + } + + /** Allocate count number of T elements + */ + AutoSTArray(int count) { + fArray = nullptr; + fCount = 0; + this->reset(count); + } + + ~AutoSTArray() { + this->reset(0); + } + + /** Destroys previous objects in the array and default constructs count number of objects */ + void reset(int count) { + T* start = fArray; + T* iter = start + fCount; + while (iter > start) { + (--iter)->~T(); + } + + SkASSERT(count >= 0); + if (fCount != count) { + if (fCount > kCount) { + // 'fArray' was allocated last time so free it now + SkASSERT((T*) fStorage != fArray); + sk_free(fArray); + } + + if (count > kCount) { + fArray = (T*) sk_malloc_throw(count, sizeof(T)); + } else if (count > 0) { + fArray = (T*) fStorage; + } else { + fArray = nullptr; + } + + fCount = count; + } + + iter = fArray; + T* stop = fArray + count; + while (iter < stop) { + new (iter++) T; + } + } + + /** Return the number of T elements in the array + */ + int count() const { return fCount; } + + /** Return the array of T elements. Will be NULL if count == 0 + */ + T* get() const { return fArray; } + + T* begin() { return fArray; } + + const T* begin() const { return fArray; } + + T* end() { return fArray + fCount; } + + const T* end() const { return fArray + fCount; } + + /** Return the nth element in the array + */ + T& operator[](int index) const { + SkASSERT(index < fCount); + return fArray[index]; + } + + /** Aliases matching other types, like std::vector. */ + const T* data() const { return fArray; } + T* data() { return fArray; } + size_t size() const { return fCount; } + +private: +#if defined(SK_BUILD_FOR_GOOGLE3) + // Stack frame size is limited for SK_BUILD_FOR_GOOGLE3. 4k is less than the actual max, + // but some functions have multiple large stack allocations. + static const int kMaxBytes = 4 * 1024; + static const int kCount = kCountRequested * sizeof(T) > kMaxBytes + ? kMaxBytes / sizeof(T) + : kCountRequested; +#else + static const int kCount = kCountRequested; +#endif + + int fCount; + T* fArray; + alignas(T) char fStorage[kCount * sizeof(T)]; +}; + +/** Manages an array of T elements, freeing the array in the destructor. + * Does NOT call any constructors/destructors on T (T must be POD). + */ +template ::value && + std::is_trivially_destructible::value>> +class AutoTMalloc { +public: + /** Takes ownership of the ptr. The ptr must be a value which can be passed to sk_free. */ + explicit AutoTMalloc(T* ptr = nullptr) : fPtr(ptr) {} + + /** Allocates space for 'count' Ts. */ + explicit AutoTMalloc(size_t count) + : fPtr(count ? (T*)sk_malloc_throw(count, sizeof(T)) : nullptr) {} + + AutoTMalloc(AutoTMalloc&&) = default; + AutoTMalloc& operator=(AutoTMalloc&&) = default; + + /** Resize the memory area pointed to by the current ptr preserving contents. */ + void realloc(size_t count) { + fPtr.reset(count ? (T*)sk_realloc_throw(fPtr.release(), count * sizeof(T)) : nullptr); + } + + /** Resize the memory area pointed to by the current ptr without preserving contents. */ + T* reset(size_t count = 0) { + fPtr.reset(count ? (T*)sk_malloc_throw(count, sizeof(T)) : nullptr); + return this->get(); + } + + T* get() const { return fPtr.get(); } + + operator T*() { return fPtr.get(); } + + operator const T*() const { return fPtr.get(); } + + T& operator[](int index) { return fPtr.get()[index]; } + + const T& operator[](int index) const { return fPtr.get()[index]; } + + /** Aliases matching other types, like std::vector. */ + const T* data() const { return fPtr.get(); } + T* data() { return fPtr.get(); } + + /** + * Transfer ownership of the ptr to the caller, setting the internal + * pointer to NULL. Note that this differs from get(), which also returns + * the pointer, but it does not transfer ownership. + */ + T* release() { return fPtr.release(); } + +private: + std::unique_ptr> fPtr; +}; + +template ::value && + std::is_trivially_destructible::value>> +class AutoSTMalloc { +public: + AutoSTMalloc() : fPtr(fTStorage) {} + + AutoSTMalloc(size_t count) { + if (count > kCount) { + fPtr = (T*)sk_malloc_throw(count, sizeof(T)); + } else if (count) { + fPtr = fTStorage; + } else { + fPtr = nullptr; + } + } + + AutoSTMalloc(AutoSTMalloc&&) = delete; + AutoSTMalloc(const AutoSTMalloc&) = delete; + AutoSTMalloc& operator=(AutoSTMalloc&&) = delete; + AutoSTMalloc& operator=(const AutoSTMalloc&) = delete; + + ~AutoSTMalloc() { + if (fPtr != fTStorage) { + sk_free(fPtr); + } + } + + // doesn't preserve contents + T* reset(size_t count) { + if (fPtr != fTStorage) { + sk_free(fPtr); + } + if (count > kCount) { + fPtr = (T*)sk_malloc_throw(count, sizeof(T)); + } else if (count) { + fPtr = fTStorage; + } else { + fPtr = nullptr; + } + return fPtr; + } + + T* get() const { return fPtr; } + + operator T*() { + return fPtr; + } + + operator const T*() const { + return fPtr; + } + + T& operator[](int index) { + return fPtr[index]; + } + + const T& operator[](int index) const { + return fPtr[index]; + } + + /** Aliases matching other types, like std::vector. */ + const T* data() const { return fPtr; } + T* data() { return fPtr; } + + // Reallocs the array, can be used to shrink the allocation. Makes no attempt to be intelligent + void realloc(size_t count) { + if (count > kCount) { + if (fPtr == fTStorage) { + fPtr = (T*)sk_malloc_throw(count, sizeof(T)); + memcpy((void*)fPtr, fTStorage, kCount * sizeof(T)); + } else { + fPtr = (T*)sk_realloc_throw(fPtr, count, sizeof(T)); + } + } else if (count) { + if (fPtr != fTStorage) { + fPtr = (T*)sk_realloc_throw(fPtr, count, sizeof(T)); + } + } else { + this->reset(0); + } + } + +private: + // Since we use uint32_t storage, we might be able to get more elements for free. + static const size_t kCountWithPadding = SkAlign4(kCountRequested*sizeof(T)) / sizeof(T); +#if defined(SK_BUILD_FOR_GOOGLE3) + // Stack frame size is limited for SK_BUILD_FOR_GOOGLE3. 4k is less than the actual max, but some functions + // have multiple large stack allocations. + static const size_t kMaxBytes = 4 * 1024; + static const size_t kCount = kCountRequested * sizeof(T) > kMaxBytes + ? kMaxBytes / sizeof(T) + : kCountWithPadding; +#else + static const size_t kCount = kCountWithPadding; +#endif + + T* fPtr; + union { + uint32_t fStorage32[SkAlign4(kCount*sizeof(T)) >> 2]; + T fTStorage[1]; // do NOT want to invoke T::T() + }; +}; + +using UniqueVoidPtr = std::unique_ptr>; + +} // namespace skia_private + +template +constexpr auto SkMakeArrayFromIndexSequence(C c, std::index_sequence is) +-> std::array())), sizeof...(Is)> { + return {{ c(Is)... }}; +} + +template constexpr auto SkMakeArray(C c) +-> std::array::value_type>())), N> { + return SkMakeArrayFromIndexSequence(c, std::make_index_sequence{}); +} + +#endif diff --git a/gfx/skia/skia/include/private/base/SkThreadAnnotations.h b/gfx/skia/skia/include/private/base/SkThreadAnnotations.h new file mode 100644 index 0000000000..fc2a4aacee --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkThreadAnnotations.h @@ -0,0 +1,91 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkThreadAnnotations_DEFINED +#define SkThreadAnnotations_DEFINED + +// The bulk of this code is cribbed from: +// http://clang.llvm.org/docs/ThreadSafetyAnalysis.html + +#if defined(__clang__) && (!defined(SWIG)) +#define SK_THREAD_ANNOTATION_ATTRIBUTE(x) __attribute__((x)) +#else +#define SK_THREAD_ANNOTATION_ATTRIBUTE(x) // no-op +#endif + +#define SK_CAPABILITY(x) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(capability(x)) + +#define SK_SCOPED_CAPABILITY \ + SK_THREAD_ANNOTATION_ATTRIBUTE(scoped_lockable) + +#define SK_GUARDED_BY(x) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(guarded_by(x)) + +#define SK_PT_GUARDED_BY(x) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(pt_guarded_by(x)) + +#define SK_ACQUIRED_BEFORE(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(acquired_before(__VA_ARGS__)) + +#define SK_ACQUIRED_AFTER(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(acquired_after(__VA_ARGS__)) + +#define SK_REQUIRES(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(requires_capability(__VA_ARGS__)) + +#define SK_REQUIRES_SHARED(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(requires_shared_capability(__VA_ARGS__)) + +#define SK_ACQUIRE(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(acquire_capability(__VA_ARGS__)) + +#define SK_ACQUIRE_SHARED(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(acquire_shared_capability(__VA_ARGS__)) + +// Would be SK_RELEASE, but that is already in use as SK_DEBUG vs. SK_RELEASE. +#define SK_RELEASE_CAPABILITY(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(release_capability(__VA_ARGS__)) + +// For symmetry with SK_RELEASE_CAPABILITY. +#define SK_RELEASE_SHARED_CAPABILITY(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(release_shared_capability(__VA_ARGS__)) + +#define SK_TRY_ACQUIRE(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(try_acquire_capability(__VA_ARGS__)) + +#define SK_TRY_ACQUIRE_SHARED(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(try_acquire_shared_capability(__VA_ARGS__)) + +#define SK_EXCLUDES(...) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(locks_excluded(__VA_ARGS__)) + +#define SK_ASSERT_CAPABILITY(x) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(assert_capability(x)) + +#define SK_ASSERT_SHARED_CAPABILITY(x) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(assert_shared_capability(x)) + +#define SK_RETURN_CAPABILITY(x) \ + SK_THREAD_ANNOTATION_ATTRIBUTE(lock_returned(x)) + +#define SK_NO_THREAD_SAFETY_ANALYSIS \ + SK_THREAD_ANNOTATION_ATTRIBUTE(no_thread_safety_analysis) + +#if defined(SK_BUILD_FOR_GOOGLE3) && !defined(SK_BUILD_FOR_WASM_IN_GOOGLE3) + extern "C" { + void __google_cxa_guard_acquire_begin(void); + void __google_cxa_guard_acquire_end (void); + } + #define SK_POTENTIALLY_BLOCKING_REGION_BEGIN __google_cxa_guard_acquire_begin() + #define SK_POTENTIALLY_BLOCKING_REGION_END __google_cxa_guard_acquire_end() +#else + #define SK_POTENTIALLY_BLOCKING_REGION_BEGIN + #define SK_POTENTIALLY_BLOCKING_REGION_END +#endif + +#endif // SkThreadAnnotations_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkThreadID.h b/gfx/skia/skia/include/private/base/SkThreadID.h new file mode 100644 index 0000000000..18984884c9 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkThreadID.h @@ -0,0 +1,23 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkThreadID_DEFINED +#define SkThreadID_DEFINED + +#include "include/private/base/SkAPI.h" +#include "include/private/base/SkDebug.h" + +#include + +typedef int64_t SkThreadID; + +// SkMutex.h uses SkGetThreadID in debug only code. +SkDEBUGCODE(SK_SPI) SkThreadID SkGetThreadID(); + +const SkThreadID kIllegalThreadID = 0; + +#endif // SkThreadID_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkTo.h b/gfx/skia/skia/include/private/base/SkTo.h new file mode 100644 index 0000000000..51ccafeeaf --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTo.h @@ -0,0 +1,39 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkTo_DEFINED +#define SkTo_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTFitsIn.h" + +#include +#include + +template constexpr D SkTo(S s) { + return SkASSERT(SkTFitsIn(s)), + static_cast(s); +} + +template constexpr int8_t SkToS8(S x) { return SkTo(x); } +template constexpr uint8_t SkToU8(S x) { return SkTo(x); } +template constexpr int16_t SkToS16(S x) { return SkTo(x); } +template constexpr uint16_t SkToU16(S x) { return SkTo(x); } +template constexpr int32_t SkToS32(S x) { return SkTo(x); } +template constexpr uint32_t SkToU32(S x) { return SkTo(x); } +template constexpr int64_t SkToS64(S x) { return SkTo(x); } +template constexpr uint64_t SkToU64(S x) { return SkTo(x); } +template constexpr int SkToInt(S x) { return SkTo(x); } +template constexpr unsigned SkToUInt(S x) { return SkTo(x); } +template constexpr size_t SkToSizeT(S x) { return SkTo(x); } + +/** @return false or true based on the condition +*/ +template static constexpr bool SkToBool(const T& x) { + return (bool)x; +} + +#endif // SkTo_DEFINED diff --git a/gfx/skia/skia/include/private/base/SkTypeTraits.h b/gfx/skia/skia/include/private/base/SkTypeTraits.h new file mode 100644 index 0000000000..736f789776 --- /dev/null +++ b/gfx/skia/skia/include/private/base/SkTypeTraits.h @@ -0,0 +1,33 @@ +// Copyright 2022 Google LLC +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#ifndef SkTypeTraits_DEFINED +#define SkTypeTraits_DEFINED + +#include +#include + +// Trait for identifying types which are relocatable via memcpy, for container optimizations. +template +struct sk_has_trivially_relocatable_member : std::false_type {}; + +// Types can declare themselves trivially relocatable with a public +// using sk_is_trivially_relocatable = std::true_type; +template +struct sk_has_trivially_relocatable_member> + : T::sk_is_trivially_relocatable {}; + +// By default, all trivially copyable types are trivially relocatable. +template +struct sk_is_trivially_relocatable + : std::disjunction, sk_has_trivially_relocatable_member>{}; + +// Here be some dragons: while technically not guaranteed, we count on all sane unique_ptr +// implementations to be trivially relocatable. +template +struct sk_is_trivially_relocatable> : std::true_type {}; + +template +inline constexpr bool sk_is_trivially_relocatable_v = sk_is_trivially_relocatable::value; + +#endif // SkTypeTraits_DEFINED diff --git a/gfx/skia/skia/include/private/chromium/GrSlug.h b/gfx/skia/skia/include/private/chromium/GrSlug.h new file mode 100644 index 0000000000..56841c5b99 --- /dev/null +++ b/gfx/skia/skia/include/private/chromium/GrSlug.h @@ -0,0 +1,16 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrSlug_DEFINED +#define GrSlug_DEFINED + +#include "include/private/chromium/Slug.h" + +// TODO: Update Chrome to use sktext::gpu classes and remove these +using GrSlug = sktext::gpu::Slug; + +#endif // GrSlug_DEFINED diff --git a/gfx/skia/skia/include/private/chromium/GrVkSecondaryCBDrawContext.h b/gfx/skia/skia/include/private/chromium/GrVkSecondaryCBDrawContext.h new file mode 100644 index 0000000000..51ed8a804d --- /dev/null +++ b/gfx/skia/skia/include/private/chromium/GrVkSecondaryCBDrawContext.h @@ -0,0 +1,130 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrVkSecondaryCBDrawContext_DEFINED +#define GrVkSecondaryCBDrawContext_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTypes.h" + +#include + +class GrBackendSemaphore; +class GrRecordingContext; +struct GrVkDrawableInfo; +namespace skgpu::ganesh { +class Device; +} +class SkCanvas; +class SkDeferredDisplayList; +struct SkImageInfo; +class SkSurfaceCharacterization; +class SkSurfaceProps; + +/** + * This class is a private header that is intended to only be used inside of Chromium. This requires + * Chromium to burrow in and include this specifically since it is not part of skia's public include + * directory. + */ + +/** + * This class is used to draw into an external Vulkan secondary command buffer that is imported + * by the client. The secondary command buffer that gets imported must already have had begin called + * on it with VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT. Thus any draws to the imported + * command buffer cannot require changing the render pass. This requirement means that certain types + * of draws will not be supported when using a GrVkSecondaryCBDrawContext. This includes: + * Draws that require a dst copy for blending will be dropped + * Text draws will be dropped (these may require intermediate uploads of text data) + * Read and Write pixels will not work + * Any other draw that requires a copy will fail (this includes using backdrop filter with save + * layer). + * Stenciling is also disabled, but that should not restrict any actual draws from working. + * + * While using a GrVkSecondaryCBDrawContext, the client can also draw into normal SkSurfaces and + * then draw those SkSufaces (as SkImages) into the GrVkSecondaryCBDrawContext. If any of the + * previously mentioned unsupported draws are needed by the client, they can draw them into an + * offscreen surface, and then draw that into the GrVkSecondaryCBDrawContext. + * + * After all drawing to the GrVkSecondaryCBDrawContext has been done, the client must call flush() + * on the GrVkSecondaryCBDrawContext to actually fill in the secondary VkCommandBuffer with the + * draws. + * + * Additionally, the client must keep the GrVkSecondaryCBDrawContext alive until the secondary + * VkCommandBuffer has been submitted and all work finished on the GPU. Before deleting the + * GrVkSecondaryCBDrawContext, the client must call releaseResources() so that Skia can cleanup + * any internal objects that were created for the draws into the secondary command buffer. + */ +class SK_SPI GrVkSecondaryCBDrawContext : public SkRefCnt { +public: + static sk_sp Make(GrRecordingContext*, + const SkImageInfo&, + const GrVkDrawableInfo&, + const SkSurfaceProps* props); + + ~GrVkSecondaryCBDrawContext() override; + + SkCanvas* getCanvas(); + + // Records all the draws to the imported secondary command buffer and sets any dependent + // offscreen draws to the GPU. + void flush(); + + /** Inserts a list of GPU semaphores that Skia will have the driver wait on before executing + commands for this secondary CB. The wait semaphores will get added to the VkCommandBuffer + owned by this GrContext when flush() is called, and not the command buffer which the + Secondary CB is from. This will guarantee that the driver waits on the semaphores before + the secondary command buffer gets executed. If this call returns false, then the GPU + back end will not wait on any passed in semaphores, and the client will still own the + semaphores, regardless of the value of deleteSemaphoresAfterWait. + + If deleteSemaphoresAfterWait is false then Skia will not delete the semaphores. In this case + it is the client's responsibility to not destroy or attempt to reuse the semaphores until it + knows that Skia has finished waiting on them. This can be done by using finishedProcs + on flush calls. + + @param numSemaphores size of waitSemaphores array + @param waitSemaphores array of semaphore containers + @paramm deleteSemaphoresAfterWait who owns and should delete the semaphores + @return true if GPU is waiting on semaphores + */ + bool wait(int numSemaphores, + const GrBackendSemaphore waitSemaphores[], + bool deleteSemaphoresAfterWait = true); + + // This call will release all resources held by the draw context. The client must call + // releaseResources() before deleting the drawing context. However, the resources also include + // any Vulkan resources that were created and used for draws. Therefore the client must only + // call releaseResources() after submitting the secondary command buffer, and waiting for it to + // finish on the GPU. If it is called earlier then some vulkan objects may be deleted while they + // are still in use by the GPU. + void releaseResources(); + + const SkSurfaceProps& props() const { return fProps; } + + // TODO: Fill out these calls to support DDL + bool characterize(SkSurfaceCharacterization* characterization) const; + +#ifndef SK_DDL_IS_UNIQUE_POINTER + bool draw(sk_sp deferredDisplayList); +#else + bool draw(const SkDeferredDisplayList* deferredDisplayList); +#endif + + bool isCompatible(const SkSurfaceCharacterization& characterization) const; + +private: + explicit GrVkSecondaryCBDrawContext(sk_sp, const SkSurfaceProps*); + + sk_sp fDevice; + std::unique_ptr fCachedCanvas; + const SkSurfaceProps fProps; + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/private/chromium/SkChromeRemoteGlyphCache.h b/gfx/skia/skia/include/private/chromium/SkChromeRemoteGlyphCache.h new file mode 100644 index 0000000000..962d183b2d --- /dev/null +++ b/gfx/skia/skia/include/private/chromium/SkChromeRemoteGlyphCache.h @@ -0,0 +1,148 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkChromeRemoteGlyphCache_DEFINED +#define SkChromeRemoteGlyphCache_DEFINED + +#include +#include + +#include "include/core/SkData.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypeface.h" +#include "include/utils/SkNoDrawCanvas.h" + +struct SkPackedGlyphID; +class SkAutoDescriptor; +class SkStrikeCache; +class SkStrikeClientImpl; +class SkStrikeServer; +class SkStrikeServerImpl; +namespace sktext::gpu { class Slug; } + +using SkDiscardableHandleId = uint32_t; +// This class is not thread-safe. +class SkStrikeServer { +public: + // An interface used by the server to create handles for pinning SkStrike + // entries on the remote client. + class DiscardableHandleManager { + public: + SK_SPI virtual ~DiscardableHandleManager() = default; + + // Creates a new *locked* handle and returns a unique ID that can be used to identify + // it on the remote client. + SK_SPI virtual SkDiscardableHandleId createHandle() = 0; + + // Returns true if the handle could be successfully locked. The server can + // assume it will remain locked until the next set of serialized entries is + // pulled from the SkStrikeServer. + // If returns false, the cache entry mapped to the handle has been deleted + // on the client. Any subsequent attempts to lock the same handle are not + // allowed. + SK_SPI virtual bool lockHandle(SkDiscardableHandleId) = 0; + + // Returns true if a handle has been deleted on the remote client. It is + // invalid to use a handle id again with this manager once this returns true. + SK_SPI virtual bool isHandleDeleted(SkDiscardableHandleId) = 0; + }; + + SK_SPI explicit SkStrikeServer(DiscardableHandleManager* discardableHandleManager); + SK_SPI ~SkStrikeServer(); + + // Create an analysis SkCanvas used to populate the SkStrikeServer with ops + // which will be serialized and rendered using the SkStrikeClient. + SK_API std::unique_ptr makeAnalysisCanvas(int width, int height, + const SkSurfaceProps& props, + sk_sp colorSpace, + bool DFTSupport, + bool DFTPerspSupport = true); + + // Serializes the strike data captured using a canvas returned by ::makeAnalysisCanvas. Any + // handles locked using the DiscardableHandleManager will be assumed to be + // unlocked after this call. + SK_SPI void writeStrikeData(std::vector* memory); + + // Testing helpers + void setMaxEntriesInDescriptorMapForTesting(size_t count); + size_t remoteStrikeMapSizeForTesting() const; + +private: + SkStrikeServerImpl* impl(); + + std::unique_ptr fImpl; +}; + +class SkStrikeClient { +public: + // This enum is used in histogram reporting in chromium. Please don't re-order the list of + // entries, and consider it to be append-only. + enum CacheMissType : uint32_t { + // Hard failures where no fallback could be found. + kFontMetrics = 0, + kGlyphMetrics = 1, + kGlyphImage = 2, + kGlyphPath = 3, + + // (DEPRECATED) The original glyph could not be found and a fallback was used. + kGlyphMetricsFallback = 4, + kGlyphPathFallback = 5, + + kGlyphDrawable = 6, + kLast = kGlyphDrawable + }; + + // An interface to delete handles that may be pinned by the remote server. + class DiscardableHandleManager : public SkRefCnt { + public: + ~DiscardableHandleManager() override = default; + + // Returns true if the handle was unlocked and can be safely deleted. Once + // successful, subsequent attempts to delete the same handle are invalid. + virtual bool deleteHandle(SkDiscardableHandleId) = 0; + + virtual void assertHandleValid(SkDiscardableHandleId) {} + + virtual void notifyCacheMiss(CacheMissType type, int fontSize) = 0; + + struct ReadFailureData { + size_t memorySize; + size_t bytesRead; + uint64_t typefaceSize; + uint64_t strikeCount; + uint64_t glyphImagesCount; + uint64_t glyphPathsCount; + }; + virtual void notifyReadFailure(const ReadFailureData& data) {} + }; + + SK_SPI explicit SkStrikeClient(sk_sp, + bool isLogging = true, + SkStrikeCache* strikeCache = nullptr); + SK_SPI ~SkStrikeClient(); + + // Deserializes the strike data from a SkStrikeServer. All messages generated + // from a server when serializing the ops must be deserialized before the op + // is rasterized. + // Returns false if the data is invalid. + SK_SPI bool readStrikeData(const volatile void* memory, size_t memorySize); + + // Given a descriptor re-write the Rec mapping the typefaceID from the renderer to the + // corresponding typefaceID on the GPU. + SK_SPI bool translateTypefaceID(SkAutoDescriptor* descriptor) const; + + // Testing helpers + sk_sp retrieveTypefaceUsingServerIDForTest(SkTypefaceID) const; + + // Given a buffer, unflatten into a slug making sure to do the typefaceID translation from + // renderer to GPU. Returns nullptr if there was a problem. + sk_sp deserializeSlugForTest(const void* data, size_t size) const; + +private: + std::unique_ptr fImpl; +}; +#endif // SkChromeRemoteGlyphCache_DEFINED diff --git a/gfx/skia/skia/include/private/chromium/SkDiscardableMemory.h b/gfx/skia/skia/include/private/chromium/SkDiscardableMemory.h new file mode 100644 index 0000000000..ade4d71aa7 --- /dev/null +++ b/gfx/skia/skia/include/private/chromium/SkDiscardableMemory.h @@ -0,0 +1,70 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDiscardableMemory_DEFINED +#define SkDiscardableMemory_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +/** + * Interface for discardable memory. Implementation is provided by the + * embedder. + */ +class SK_SPI SkDiscardableMemory { +public: + /** + * Factory method that creates, initializes and locks an SkDiscardableMemory + * object. If either of these steps fails, a nullptr pointer will be returned. + */ + static SkDiscardableMemory* Create(size_t bytes); + + /** + * Factory class that creates, initializes and locks an SkDiscardableMemory + * object. If either of these steps fails, a nullptr pointer will be returned. + */ + class Factory : public SkRefCnt { + public: + virtual SkDiscardableMemory* create(size_t bytes) = 0; + private: + using INHERITED = SkRefCnt; + }; + + /** Must not be called while locked. + */ + virtual ~SkDiscardableMemory() {} + + /** + * Locks the memory, prevent it from being discarded. Once locked. you may + * obtain a pointer to that memory using the data() method. + * + * lock() may return false, indicating that the underlying memory was + * discarded and that the lock failed. + * + * Nested calls to lock are not allowed. + */ + virtual bool SK_WARN_UNUSED_RESULT lock() = 0; + + /** + * Returns the current pointer for the discardable memory. This call is ONLY + * valid when the discardable memory object is locked. + */ + virtual void* data() = 0; + + /** + * Unlock the memory so that it can be purged by the system. Must be called + * after every successful lock call. + */ + virtual void unlock() = 0; + +protected: + SkDiscardableMemory() = default; + SkDiscardableMemory(const SkDiscardableMemory&) = delete; + SkDiscardableMemory& operator=(const SkDiscardableMemory&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/include/private/chromium/Slug.h b/gfx/skia/skia/include/private/chromium/Slug.h new file mode 100644 index 0000000000..6775af0fc6 --- /dev/null +++ b/gfx/skia/skia/include/private/chromium/Slug.h @@ -0,0 +1,67 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef sktext_gpu_Slug_DEFINED +#define sktext_gpu_Slug_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" + +class SkCanvas; +class SkMatrix; +class SkPaint; +class SkTextBlob; +class SkReadBuffer; +class SkStrikeClient; +class SkWriteBuffer; + +namespace sktext::gpu { +// Slug encapsulates an SkTextBlob at a specific origin, using a specific paint. It can be +// manipulated using matrix and clip changes to the canvas. If the canvas is transformed, then +// the Slug will also transform with smaller glyphs using bi-linear interpolation to render. You +// can think of a Slug as making a rubber stamp out of a SkTextBlob. +class SK_API Slug : public SkRefCnt { +public: + // Return nullptr if the blob would not draw. This is not because of clipping, but because of + // some paint optimization. The Slug is captured as if drawn using drawTextBlob. + static sk_sp ConvertBlob( + SkCanvas* canvas, const SkTextBlob& blob, SkPoint origin, const SkPaint& paint); + + // Serialize the slug. + sk_sp serialize() const; + size_t serialize(void* buffer, size_t size) const; + + // Set the client parameter to the appropriate SkStrikeClient when typeface ID translation + // is needed. + static sk_sp Deserialize( + const void* data, size_t size, const SkStrikeClient* client = nullptr); + static sk_sp MakeFromBuffer(SkReadBuffer& buffer); + + + // Draw the Slug obeying the canvas's mapping and clipping. + void draw(SkCanvas* canvas) const; + + virtual SkRect sourceBounds() const = 0; + virtual SkRect sourceBoundsWithOrigin () const = 0; + + // The paint passed into ConvertBlob; this paint is used instead of the paint resulting from + // the call to aboutToDraw because when we call draw(), the initial paint is needed to call + // aboutToDraw again to get the layer right. + virtual const SkPaint& initialPaint() const = 0; + + virtual void doFlatten(SkWriteBuffer&) const = 0; + + uint32_t uniqueID() const { return fUniqueID; } + +private: + static uint32_t NextUniqueID(); + const uint32_t fUniqueID{NextUniqueID()}; +}; +} // namespace sktext::gpu + +#endif // sktext_gpu_Slug_DEFINED diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrContext_Base.h b/gfx/skia/skia/include/private/gpu/ganesh/GrContext_Base.h new file mode 100644 index 0000000000..ba7172e005 --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrContext_Base.h @@ -0,0 +1,100 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrContext_Base_DEFINED +#define GrContext_Base_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrContextOptions.h" +#include "include/gpu/GrTypes.h" + +class GrBaseContextPriv; +class GrCaps; +class GrContextThreadSafeProxy; +class GrDirectContext; +class GrImageContext; +class GrRecordingContext; +enum class SkTextureCompressionType; + +class GrContext_Base : public SkRefCnt { +public: + ~GrContext_Base() override; + + /* + * Safely downcast to a GrDirectContext. + */ + virtual GrDirectContext* asDirectContext() { return nullptr; } + + /* + * The 3D API backing this context + */ + SK_API GrBackendApi backend() const; + + /* + * Retrieve the default GrBackendFormat for a given SkColorType and renderability. + * It is guaranteed that this backend format will be the one used by the GrContext + * SkColorType and SkSurfaceCharacterization-based createBackendTexture methods. + * + * The caller should check that the returned format is valid. + */ + SK_API GrBackendFormat defaultBackendFormat(SkColorType, GrRenderable) const; + + SK_API GrBackendFormat compressedBackendFormat(SkTextureCompressionType) const; + + /** + * Gets the maximum supported sample count for a color type. 1 is returned if only non-MSAA + * rendering is supported for the color type. 0 is returned if rendering to this color type + * is not supported at all. + */ + SK_API int maxSurfaceSampleCountForColorType(SkColorType colorType) const; + + // TODO: When the public version is gone, rename to refThreadSafeProxy and add raw ptr ver. + sk_sp threadSafeProxy(); + + // Provides access to functions that aren't part of the public API. + GrBaseContextPriv priv(); + const GrBaseContextPriv priv() const; // NOLINT(readability-const-return-type) + +protected: + friend class GrBaseContextPriv; // for hidden functions + + GrContext_Base(sk_sp); + + virtual bool init(); + + /** + * An identifier for this context. The id is used by all compatible contexts. For example, + * if SkImages are created on one thread using an image creation context, then fed into a + * DDL Recorder on second thread (which has a recording context) and finally replayed on + * a third thread with a direct context, then all three contexts will report the same id. + * It is an error for an image to be used with contexts that report different ids. + */ + uint32_t contextID() const; + + bool matches(GrContext_Base* candidate) const { + return candidate && candidate->contextID() == this->contextID(); + } + + /* + * The options in effect for this context + */ + const GrContextOptions& options() const; + + const GrCaps* caps() const; + sk_sp refCaps() const; + + virtual GrImageContext* asImageContext() { return nullptr; } + virtual GrRecordingContext* asRecordingContext() { return nullptr; } + + sk_sp fThreadSafeProxy; + +private: + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrD3DTypesMinimal.h b/gfx/skia/skia/include/private/gpu/ganesh/GrD3DTypesMinimal.h new file mode 100644 index 0000000000..26b7534476 --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrD3DTypesMinimal.h @@ -0,0 +1,74 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrD3DTypesMinimal_DEFINED +#define GrD3DTypesMinimal_DEFINED + +// Minimal definitions of Direct3D types, without including d3d12.h + +#include "include/core/SkRefCnt.h" + +#include + +#include "include/gpu/GrTypes.h" + +struct ID3D12Resource; +class GrD3DResourceState; +typedef int GrD3DResourceStateEnum; +struct GrD3DSurfaceInfo; +struct GrD3DTextureResourceInfo; +struct GrD3DTextureResourceSpec; +struct GrD3DFenceInfo; + +// This struct is to used to store the the actual information about the Direct3D backend image on +// GrBackendTexture and GrBackendRenderTarget. When a client calls getD3DTextureInfo on a +// GrBackendTexture/RenderTarget, we use the GrD3DBackendSurfaceInfo to create a snapshot +// GrD3DTextureResourceInfo object. Internally, this uses a ref count GrD3DResourceState object to +// track the current D3D12_RESOURCE_STATES which can be shared with an internal GrD3DTextureResource +// so that state updates can be seen by all users of the texture. +struct GrD3DBackendSurfaceInfo { + GrD3DBackendSurfaceInfo(const GrD3DTextureResourceInfo& info, GrD3DResourceState* state); + + void cleanup(); + + GrD3DBackendSurfaceInfo& operator=(const GrD3DBackendSurfaceInfo&) = delete; + + // Assigns the passed in GrD3DBackendSurfaceInfo to this object. if isValid is true we will also + // attempt to unref the old fLayout on this object. + void assign(const GrD3DBackendSurfaceInfo&, bool isValid); + + void setResourceState(GrD3DResourceStateEnum state); + + sk_sp getGrD3DResourceState() const; + + GrD3DTextureResourceInfo snapTextureResourceInfo() const; + + bool isProtected() const; +#if GR_TEST_UTILS + bool operator==(const GrD3DBackendSurfaceInfo& that) const; +#endif + +private: + GrD3DTextureResourceInfo* fTextureResourceInfo; + GrD3DResourceState* fResourceState; +}; + +struct GrD3DTextureResourceSpecHolder { +public: + GrD3DTextureResourceSpecHolder(const GrD3DSurfaceInfo&); + + void cleanup(); + + GrD3DSurfaceInfo getSurfaceInfo(uint32_t sampleCount, + uint32_t levelCount, + skgpu::Protected isProtected) const; + +private: + GrD3DTextureResourceSpec* fSpec; +}; + +#endif diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrDawnTypesPriv.h b/gfx/skia/skia/include/private/gpu/ganesh/GrDawnTypesPriv.h new file mode 100644 index 0000000000..ffcdc0eaaf --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrDawnTypesPriv.h @@ -0,0 +1,26 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrDawnTypesPriv_DEFINED +#define GrDawnTypesPriv_DEFINED + +#include "include/gpu/dawn/GrDawnTypes.h" + +struct GrDawnTextureSpec { + GrDawnTextureSpec() {} + GrDawnTextureSpec(const GrDawnSurfaceInfo& info) : fFormat(info.fFormat) {} + + wgpu::TextureFormat fFormat; +}; + +GrDawnSurfaceInfo GrDawnTextureSpecToSurfaceInfo(const GrDawnTextureSpec& dawnSpec, + uint32_t sampleCount, + uint32_t levelCount, + skgpu::Protected isProtected); + +#endif + diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrGLTypesPriv.h b/gfx/skia/skia/include/private/gpu/ganesh/GrGLTypesPriv.h new file mode 100644 index 0000000000..7db777487a --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrGLTypesPriv.h @@ -0,0 +1,108 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRefCnt.h" +#include "include/gpu/gl/GrGLTypes.h" + +#ifndef GrGLTypesPriv_DEFINED +#define GrGLTypesPriv_DEFINED + +static constexpr int kGrGLColorFormatCount = static_cast(GrGLFormat::kLastColorFormat) + 1; + +class GrGLTextureParameters : public SkNVRefCnt { +public: + // We currently consider texture parameters invalid on all textures + // GrContext::resetContext(). We use this type to track whether instances of + // GrGLTextureParameters were updated before or after the most recent resetContext(). At 10 + // resets / frame and 60fps a 64bit timestamp will overflow in about a billion years. + // TODO: Require clients to use GrBackendTexture::glTextureParametersModified() to invalidate + // texture parameters and get rid of timestamp checking. + using ResetTimestamp = uint64_t; + + // This initializes the params to have an expired timestamp. They'll be considered invalid the + // first time the texture is used unless set() is called. + GrGLTextureParameters() = default; + + // This is texture parameter state that is overridden when a non-zero sampler object is bound. + struct SamplerOverriddenState { + SamplerOverriddenState(); + void invalidate(); + + GrGLenum fMinFilter; + GrGLenum fMagFilter; + GrGLenum fWrapS; + GrGLenum fWrapT; + GrGLfloat fMinLOD; + GrGLfloat fMaxLOD; + GrGLfloat fMaxAniso; + // We always want the border color to be transparent black, so no need to store 4 floats. + // Just track if it's been invalidated and no longer the default + bool fBorderColorInvalid; + }; + + // Texture parameter state that is not overridden by a bound sampler object. + struct NonsamplerState { + NonsamplerState(); + void invalidate(); + + GrGLint fBaseMipMapLevel; + GrGLint fMaxMipmapLevel; + bool fSwizzleIsRGBA; + }; + + void invalidate(); + + ResetTimestamp resetTimestamp() const { return fResetTimestamp; } + const SamplerOverriddenState& samplerOverriddenState() const { return fSamplerOverriddenState; } + const NonsamplerState& nonsamplerState() const { return fNonsamplerState; } + + // SamplerOverriddenState is optional because we don't track it when we're using sampler + // objects. + void set(const SamplerOverriddenState* samplerState, + const NonsamplerState& nonsamplerState, + ResetTimestamp currTimestamp); + +private: + static constexpr ResetTimestamp kExpiredTimestamp = 0; + + SamplerOverriddenState fSamplerOverriddenState; + NonsamplerState fNonsamplerState; + ResetTimestamp fResetTimestamp = kExpiredTimestamp; +}; + +class GrGLBackendTextureInfo { +public: + GrGLBackendTextureInfo(const GrGLTextureInfo& info, GrGLTextureParameters* params) + : fInfo(info), fParams(params) {} + GrGLBackendTextureInfo(const GrGLBackendTextureInfo&) = delete; + GrGLBackendTextureInfo& operator=(const GrGLBackendTextureInfo&) = delete; + const GrGLTextureInfo& info() const { return fInfo; } + GrGLTextureParameters* parameters() const { return fParams; } + sk_sp refParameters() const { return sk_ref_sp(fParams); } + + void cleanup(); + void assign(const GrGLBackendTextureInfo&, bool thisIsValid); + +private: + GrGLTextureInfo fInfo; + GrGLTextureParameters* fParams; +}; + +struct GrGLTextureSpec { + GrGLTextureSpec() : fTarget(0), fFormat(0) {} + GrGLTextureSpec(const GrGLSurfaceInfo& info) : fTarget(info.fTarget), fFormat(info.fFormat) {} + + GrGLenum fTarget; + GrGLenum fFormat; +}; + +GrGLSurfaceInfo GrGLTextureSpecToSurfaceInfo(const GrGLTextureSpec& glSpec, + uint32_t sampleCount, + uint32_t levelCount, + skgpu::Protected isProtected); + +#endif diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrImageContext.h b/gfx/skia/skia/include/private/gpu/ganesh/GrImageContext.h new file mode 100644 index 0000000000..72fdd4433d --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrImageContext.h @@ -0,0 +1,55 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrImageContext_DEFINED +#define GrImageContext_DEFINED + +#include "include/private/base/SingleOwner.h" +#include "include/private/gpu/ganesh/GrContext_Base.h" + +class GrImageContextPriv; + +// This is now just a view on a ThreadSafeProxy, that SkImages can attempt to +// downcast to a GrDirectContext as a backdoor to some operations. Once we remove the backdoors, +// this goes away and SkImages just hold ThreadSafeProxies. +class GrImageContext : public GrContext_Base { +public: + ~GrImageContext() override; + + // Provides access to functions that aren't part of the public API. + GrImageContextPriv priv(); + const GrImageContextPriv priv() const; // NOLINT(readability-const-return-type) + +protected: + friend class GrImageContextPriv; // for hidden functions + + GrImageContext(sk_sp); + + SK_API virtual void abandonContext(); + SK_API virtual bool abandoned(); + + /** This is only useful for debug purposes */ + skgpu::SingleOwner* singleOwner() const { return &fSingleOwner; } + + GrImageContext* asImageContext() override { return this; } + +private: + // When making promise images, we currently need a placeholder GrImageContext instance to give + // to the SkImage that has no real power, just a wrapper around the ThreadSafeProxy. + // TODO: De-power SkImage to ThreadSafeProxy or at least figure out a way to share one instance. + static sk_sp MakeForPromiseImage(sk_sp); + + // In debug builds we guard against improper thread handling + // This guard is passed to the GrDrawingManager and, from there to all the + // GrSurfaceDrawContexts. It is also passed to the GrResourceProvider and SkGpuDevice. + // TODO: Move this down to GrRecordingContext. + mutable skgpu::SingleOwner fSingleOwner; + + using INHERITED = GrContext_Base; +}; + +#endif diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrMockTypesPriv.h b/gfx/skia/skia/include/private/gpu/ganesh/GrMockTypesPriv.h new file mode 100644 index 0000000000..59a608dcfc --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrMockTypesPriv.h @@ -0,0 +1,32 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrMockTypesPriv_DEFINED +#define GrMockTypesPriv_DEFINED + +#include "include/core/SkTextureCompressionType.h" +#include "include/gpu/mock/GrMockTypes.h" + +struct GrMockTextureSpec { + GrMockTextureSpec() + : fColorType(GrColorType::kUnknown) + , fCompressionType(SkTextureCompressionType::kNone) {} + GrMockTextureSpec(const GrMockSurfaceInfo& info) + : fColorType(info.fColorType) + , fCompressionType(info.fCompressionType) {} + + GrColorType fColorType = GrColorType::kUnknown; + SkTextureCompressionType fCompressionType = SkTextureCompressionType::kNone; +}; + +GrMockSurfaceInfo GrMockTextureSpecToSurfaceInfo(const GrMockTextureSpec& mockSpec, + uint32_t sampleCount, + uint32_t levelCount, + GrProtected isProtected); + +#endif + diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrMtlTypesPriv.h b/gfx/skia/skia/include/private/gpu/ganesh/GrMtlTypesPriv.h new file mode 100644 index 0000000000..ef65848b5e --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrMtlTypesPriv.h @@ -0,0 +1,75 @@ +/* + * Copyright 2021 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrMtlTypesPriv_DEFINED +#define GrMtlTypesPriv_DEFINED + +#include "include/gpu/GrTypes.h" +#include "include/gpu/mtl/GrMtlTypes.h" + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef __APPLE__ + +#include + +#if defined(SK_BUILD_FOR_MAC) +#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 110000 +#define GR_METAL_SDK_VERSION 230 +#elif __MAC_OS_X_VERSION_MAX_ALLOWED >= 101500 +#define GR_METAL_SDK_VERSION 220 +#elif __MAC_OS_X_VERSION_MAX_ALLOWED >= 101400 +#define GR_METAL_SDK_VERSION 210 +#else +#error Must use at least 10.14 SDK to build Metal backend for MacOS +#endif +#else +#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 140000 || __TV_OS_VERSION_MAX_ALLOWED >= 140000 +#define GR_METAL_SDK_VERSION 230 +#elif __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000 || __TV_OS_VERSION_MAX_ALLOWED >= 130000 +#define GR_METAL_SDK_VERSION 220 +#elif __IPHONE_OS_VERSION_MAX_ALLOWED >= 120000 || __TV_OS_VERSION_MAX_ALLOWED >= 120000 +#define GR_METAL_SDK_VERSION 210 +#else +#error Must use at least 12.00 SDK to build Metal backend for iOS +#endif +#endif + +#if __has_feature(objc_arc) && __has_attribute(objc_externally_retained) +#define GR_NORETAIN __attribute__((objc_externally_retained)) +#define GR_NORETAIN_BEGIN \ + _Pragma("clang attribute push (__attribute__((objc_externally_retained)), apply_to=any(function,objc_method))") +#define GR_NORETAIN_END _Pragma("clang attribute pop") +#else +#define GR_NORETAIN +#define GR_NORETAIN_BEGIN +#define GR_NORETAIN_END +#endif + +struct GrMtlTextureSpec { + GrMtlTextureSpec() + : fFormat(0) + , fUsage(0) + , fStorageMode(0) {} + GrMtlTextureSpec(const GrMtlSurfaceInfo& info) + : fFormat(info.fFormat) + , fUsage(info.fUsage) + , fStorageMode(info.fStorageMode) {} + + GrMTLPixelFormat fFormat; + GrMTLTextureUsage fUsage; + GrMTLStorageMode fStorageMode; +}; + +GrMtlSurfaceInfo GrMtlTextureSpecToSurfaceInfo(const GrMtlTextureSpec& mtlSpec, + uint32_t sampleCount, + uint32_t levelCount, + skgpu::Protected isProtected); + +#endif // __APPLE__ + +#endif // GrMtlTypesPriv_DEFINED diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrTypesPriv.h b/gfx/skia/skia/include/private/gpu/ganesh/GrTypesPriv.h new file mode 100644 index 0000000000..fb8688de0d --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrTypesPriv.h @@ -0,0 +1,1042 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrTypesPriv_DEFINED +#define GrTypesPriv_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPath.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTextureCompressionType.h" +#include "include/gpu/GrTypes.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTypeTraits.h" + +#include +#include + +class GrBackendFormat; +class GrCaps; +class GrSurfaceProxy; + +#ifdef MOZ_SKIA +#include "mozilla/TimeStamp.h" + +struct GrStdSteadyClock +{ + typedef mozilla::TimeStamp time_point; + + static time_point now() { + return mozilla::TimeStamp::NowLoRes(); + } +}; + +static inline GrStdSteadyClock::time_point +operator-(GrStdSteadyClock::time_point t, std::chrono::milliseconds ms) { + return t - mozilla::TimeDuration::FromMilliseconds(ms.count()); +} + +#else + +// The old libstdc++ uses the draft name "monotonic_clock" rather than "steady_clock". This might +// not actually be monotonic, depending on how libstdc++ was built. However, this is only currently +// used for idle resource purging so it shouldn't cause a correctness problem. +#if defined(__GLIBCXX__) && (__GLIBCXX__ < 20130000) +using GrStdSteadyClock = std::chrono::monotonic_clock; +#else +using GrStdSteadyClock = std::chrono::steady_clock; +#endif + +#endif + +/** + * divide, rounding up + */ + +static inline constexpr size_t GrSizeDivRoundUp(size_t x, size_t y) { return (x + (y - 1)) / y; } + +/** + * Geometric primitives used for drawing. + */ +enum class GrPrimitiveType : uint8_t { + kTriangles, + kTriangleStrip, + kPoints, + kLines, // 1 pix wide only + kLineStrip, // 1 pix wide only +}; +static constexpr int kNumGrPrimitiveTypes = (int)GrPrimitiveType::kLineStrip + 1; + +static constexpr bool GrIsPrimTypeLines(GrPrimitiveType type) { + return GrPrimitiveType::kLines == type || GrPrimitiveType::kLineStrip == type; +} + +enum class GrPrimitiveRestart : bool { + kNo = false, + kYes = true +}; + +/** + * Should a created surface be texturable? + */ +enum class GrTexturable : bool { + kNo = false, + kYes = true +}; + +// A DDL recorder has its own proxy provider and proxy cache. This enum indicates if +// a given proxy provider is one of these special ones. +enum class GrDDLProvider : bool { + kNo = false, + kYes = true +}; + +/** Ownership rules for external GPU resources imported into Skia. */ +enum GrWrapOwnership { + /** Skia will assume the client will keep the resource alive and Skia will not free it. */ + kBorrow_GrWrapOwnership, + + /** Skia will assume ownership of the resource and free it. */ + kAdopt_GrWrapOwnership, +}; + +enum class GrWrapCacheable : bool { + /** + * The wrapped resource will be removed from the cache as soon as it becomes purgeable. It may + * still be assigned and found by a unique key, but the presence of the key will not be used to + * keep the resource alive when it has no references. + */ + kNo = false, + /** + * The wrapped resource is allowed to remain in the GrResourceCache when it has no references + * but has a unique key. Such resources should only be given unique keys when it is known that + * the key will eventually be removed from the resource or invalidated via the message bus. + */ + kYes = true +}; + +enum class GrBudgetedType : uint8_t { + /** The resource is budgeted and is subject to purging under budget pressure. */ + kBudgeted, + /** + * The resource is unbudgeted and is purged as soon as it has no refs regardless of whether + * it has a unique or scratch key. + */ + kUnbudgetedUncacheable, + /** + * The resource is unbudgeted and is allowed to remain in the cache with no refs if it + * has a unique key. Scratch keys are ignored. + */ + kUnbudgetedCacheable, +}; + +enum class GrScissorTest : bool { + kDisabled = false, + kEnabled = true +}; + +/* + * Used to say whether texture is backed by memory. + */ +enum class GrMemoryless : bool { + /** + * The texture will be allocated normally and will affect memory budgets. + */ + kNo = false, + /** + * The texture will be not use GPU memory and will not affect memory budgets. + */ + kYes = true +}; + +struct GrMipLevel { + const void* fPixels = nullptr; + size_t fRowBytes = 0; + // This may be used to keep fPixels from being freed while a GrMipLevel exists. + sk_sp fOptionalStorage; + + static_assert(::sk_is_trivially_relocatable::value); + static_assert(::sk_is_trivially_relocatable::value); + + using sk_is_trivially_relocatable = std::true_type; +}; + +enum class GrSemaphoreWrapType { + kWillSignal, + kWillWait, +}; + +/** + * This enum is used to specify the load operation to be used when an OpsTask/GrOpsRenderPass + * begins execution. + */ +enum class GrLoadOp { + kLoad, + kClear, + kDiscard, +}; + +/** + * This enum is used to specify the store operation to be used when an OpsTask/GrOpsRenderPass + * ends execution. + */ +enum class GrStoreOp { + kStore, + kDiscard, +}; + +/** + * Used to control antialiasing in draw calls. + */ +enum class GrAA : bool { + kNo = false, + kYes = true +}; + +enum class GrFillRule : bool { + kNonzero, + kEvenOdd +}; + +inline GrFillRule GrFillRuleForPathFillType(SkPathFillType fillType) { + switch (fillType) { + case SkPathFillType::kWinding: + case SkPathFillType::kInverseWinding: + return GrFillRule::kNonzero; + case SkPathFillType::kEvenOdd: + case SkPathFillType::kInverseEvenOdd: + return GrFillRule::kEvenOdd; + } + SkUNREACHABLE; +} + +inline GrFillRule GrFillRuleForSkPath(const SkPath& path) { + return GrFillRuleForPathFillType(path.getFillType()); +} + +/** This enum indicates the type of antialiasing to be performed. */ +enum class GrAAType : unsigned { + /** No antialiasing */ + kNone, + /** Use fragment shader code to blend with a fractional pixel coverage. */ + kCoverage, + /** Use normal MSAA. */ + kMSAA, + + kLast = kMSAA +}; +static const int kGrAATypeCount = static_cast(GrAAType::kLast) + 1; + +static constexpr bool GrAATypeIsHW(GrAAType type) { + switch (type) { + case GrAAType::kNone: + return false; + case GrAAType::kCoverage: + return false; + case GrAAType::kMSAA: + return true; + } + SkUNREACHABLE; +} + +/** + * Some pixel configs are inherently clamped to [0,1], some are allowed to go outside that range, + * and some are FP but manually clamped in the XP. + */ +enum class GrClampType { + kAuto, // Normalized, fixed-point configs + kManual, // Clamped FP configs + kNone, // Normal (unclamped) FP configs +}; + +/** + * A number of rectangle/quadrilateral drawing APIs can control anti-aliasing on a per edge basis. + * These masks specify which edges are AA'ed. The intent for this is to support tiling with seamless + * boundaries, where the inner edges are non-AA and the outer edges are AA. Regular rectangle draws + * simply use kAll or kNone depending on if they want anti-aliasing or not. + * + * In APIs that support per-edge AA, GrQuadAAFlags is the only AA-control parameter that is + * provided (compared to the typical GrAA parameter). kNone is equivalent to GrAA::kNo, and any + * other set of edge flags would require GrAA::kYes (with rendering output dependent on how that + * maps to GrAAType for a given SurfaceDrawContext). + * + * These values are identical to SkCanvas::QuadAAFlags. + */ +enum class GrQuadAAFlags { + kLeft = 0b0001, + kTop = 0b0010, + kRight = 0b0100, + kBottom = 0b1000, + + kNone = 0b0000, + kAll = 0b1111, +}; + +GR_MAKE_BITFIELD_CLASS_OPS(GrQuadAAFlags) + +static inline GrQuadAAFlags SkToGrQuadAAFlags(unsigned flags) { + return static_cast(flags); +} + +/** + * The type of texture. Backends other than GL currently only use the 2D value but the type must + * still be known at the API-neutral layer as it used to determine whether MIP maps, renderability, + * and sampling parameters are legal for proxies that will be instantiated with wrapped textures. + */ +enum class GrTextureType { + kNone, + k2D, + /* Rectangle uses unnormalized texture coordinates. */ + kRectangle, + kExternal +}; + +enum GrShaderType { + kVertex_GrShaderType, + kFragment_GrShaderType, + + kLastkFragment_GrShaderType = kFragment_GrShaderType +}; +static const int kGrShaderTypeCount = kLastkFragment_GrShaderType + 1; + +enum GrShaderFlags { + kNone_GrShaderFlags = 0, + kVertex_GrShaderFlag = 1 << 0, + kFragment_GrShaderFlag = 1 << 1 +}; +SK_MAKE_BITFIELD_OPS(GrShaderFlags) + +/** Rectangle and external textures only support the clamp wrap mode and do not support + * MIP maps. + */ +static inline bool GrTextureTypeHasRestrictedSampling(GrTextureType type) { + switch (type) { + case GrTextureType::k2D: + return false; + case GrTextureType::kRectangle: + return true; + case GrTextureType::kExternal: + return true; + default: + SK_ABORT("Unexpected texture type"); + } +} + +////////////////////////////////////////////////////////////////////////////// + +/** + * Types used to describe format of vertices in arrays. + */ +enum GrVertexAttribType { + kFloat_GrVertexAttribType = 0, + kFloat2_GrVertexAttribType, + kFloat3_GrVertexAttribType, + kFloat4_GrVertexAttribType, + kHalf_GrVertexAttribType, + kHalf2_GrVertexAttribType, + kHalf4_GrVertexAttribType, + + kInt2_GrVertexAttribType, // vector of 2 32-bit ints + kInt3_GrVertexAttribType, // vector of 3 32-bit ints + kInt4_GrVertexAttribType, // vector of 4 32-bit ints + + + kByte_GrVertexAttribType, // signed byte + kByte2_GrVertexAttribType, // vector of 2 8-bit signed bytes + kByte4_GrVertexAttribType, // vector of 4 8-bit signed bytes + kUByte_GrVertexAttribType, // unsigned byte + kUByte2_GrVertexAttribType, // vector of 2 8-bit unsigned bytes + kUByte4_GrVertexAttribType, // vector of 4 8-bit unsigned bytes + + kUByte_norm_GrVertexAttribType, // unsigned byte, e.g. coverage, 0 -> 0.0f, 255 -> 1.0f. + kUByte4_norm_GrVertexAttribType, // vector of 4 unsigned bytes, e.g. colors, 0 -> 0.0f, + // 255 -> 1.0f. + + kShort2_GrVertexAttribType, // vector of 2 16-bit shorts. + kShort4_GrVertexAttribType, // vector of 4 16-bit shorts. + + kUShort2_GrVertexAttribType, // vector of 2 unsigned shorts. 0 -> 0, 65535 -> 65535. + kUShort2_norm_GrVertexAttribType, // vector of 2 unsigned shorts. 0 -> 0.0f, 65535 -> 1.0f. + + kInt_GrVertexAttribType, + kUInt_GrVertexAttribType, + + kUShort_norm_GrVertexAttribType, + + kUShort4_norm_GrVertexAttribType, // vector of 4 unsigned shorts. 0 -> 0.0f, 65535 -> 1.0f. + + kLast_GrVertexAttribType = kUShort4_norm_GrVertexAttribType +}; +static const int kGrVertexAttribTypeCount = kLast_GrVertexAttribType + 1; + +////////////////////////////////////////////////////////////////////////////// + +/** + * We have coverage effects that clip rendering to the edge of some geometric primitive. + * This enum specifies how that clipping is performed. Not all factories that take a + * GrClipEdgeType will succeed with all values and it is up to the caller to verify success. + */ +enum class GrClipEdgeType { + kFillBW, + kFillAA, + kInverseFillBW, + kInverseFillAA, + + kLast = kInverseFillAA +}; +static const int kGrClipEdgeTypeCnt = (int) GrClipEdgeType::kLast + 1; + +static constexpr bool GrClipEdgeTypeIsFill(const GrClipEdgeType edgeType) { + return (GrClipEdgeType::kFillAA == edgeType || GrClipEdgeType::kFillBW == edgeType); +} + +static constexpr bool GrClipEdgeTypeIsInverseFill(const GrClipEdgeType edgeType) { + return (GrClipEdgeType::kInverseFillAA == edgeType || + GrClipEdgeType::kInverseFillBW == edgeType); +} + +static constexpr bool GrClipEdgeTypeIsAA(const GrClipEdgeType edgeType) { + return (GrClipEdgeType::kFillBW != edgeType && + GrClipEdgeType::kInverseFillBW != edgeType); +} + +static inline GrClipEdgeType GrInvertClipEdgeType(const GrClipEdgeType edgeType) { + switch (edgeType) { + case GrClipEdgeType::kFillBW: + return GrClipEdgeType::kInverseFillBW; + case GrClipEdgeType::kFillAA: + return GrClipEdgeType::kInverseFillAA; + case GrClipEdgeType::kInverseFillBW: + return GrClipEdgeType::kFillBW; + case GrClipEdgeType::kInverseFillAA: + return GrClipEdgeType::kFillAA; + } + SkUNREACHABLE; +} + +/** + * Indicates the type of pending IO operations that can be recorded for gpu resources. + */ +enum GrIOType { + kRead_GrIOType, + kWrite_GrIOType, + kRW_GrIOType +}; + +/** + * Indicates the type of data that a GPU buffer will be used for. + */ +enum class GrGpuBufferType { + kVertex, + kIndex, + kDrawIndirect, + kXferCpuToGpu, + kXferGpuToCpu, + kUniform, +}; +static const constexpr int kGrGpuBufferTypeCount = static_cast(GrGpuBufferType::kUniform) + 1; + +/** + * Provides a performance hint regarding the frequency at which a data store will be accessed. + */ +enum GrAccessPattern { + /** Data store will be respecified repeatedly and used many times. */ + kDynamic_GrAccessPattern, + /** Data store will be specified once and used many times. (Thus disqualified from caching.) */ + kStatic_GrAccessPattern, + /** Data store will be specified once and used at most a few times. (Also can't be cached.) */ + kStream_GrAccessPattern, + + kLast_GrAccessPattern = kStream_GrAccessPattern +}; + +// Flags shared between the GrSurface & GrSurfaceProxy class hierarchies +enum class GrInternalSurfaceFlags { + kNone = 0, + + // Texture-level + + // Means the pixels in the texture are read-only. Cannot also be a GrRenderTarget[Proxy]. + kReadOnly = 1 << 0, + + // RT-level + + // This flag is for use with GL only. It tells us that the internal render target wraps FBO 0. + kGLRTFBOIDIs0 = 1 << 1, + + // This means the render target is multisampled, and internally holds a non-msaa texture for + // resolving into. The render target resolves itself by blitting into this internal texture. + // (asTexture() might or might not return the internal texture, but if it does, we always + // resolve the render target before accessing this texture's data.) + kRequiresManualMSAAResolve = 1 << 2, + + // This means the pixels in the render target are write-only. This is used for Dawn and Metal + // swap chain targets which can be rendered to, but not read or copied. + kFramebufferOnly = 1 << 3, + + // This is a Vulkan only flag. If set the surface can be used as an input attachment in a + // shader. This is used for doing in shader blending where we want to sample from the same + // image we are drawing to. + kVkRTSupportsInputAttachment = 1 << 4, +}; + +GR_MAKE_BITFIELD_CLASS_OPS(GrInternalSurfaceFlags) + +// 'GR_MAKE_BITFIELD_CLASS_OPS' defines the & operator on GrInternalSurfaceFlags to return bool. +// We want to find the bitwise & with these masks, so we declare them as ints. +constexpr static int kGrInternalTextureFlagsMask = static_cast( + GrInternalSurfaceFlags::kReadOnly); + +// We don't include kVkRTSupportsInputAttachment in this mask since we check it manually. We don't +// require that both the surface and proxy have matching values for this flag. Instead we require +// if the proxy has it set then the surface must also have it set. All other flags listed here must +// match on the proxy and surface. +// TODO: Add back kFramebufferOnly flag here once we update SkSurfaceCharacterization to take it +// as a flag. skbug.com/10672 +constexpr static int kGrInternalRenderTargetFlagsMask = static_cast( + GrInternalSurfaceFlags::kGLRTFBOIDIs0 | + GrInternalSurfaceFlags::kRequiresManualMSAAResolve/* | + GrInternalSurfaceFlags::kFramebufferOnly*/); + +constexpr static int kGrInternalTextureRenderTargetFlagsMask = + kGrInternalTextureFlagsMask | kGrInternalRenderTargetFlagsMask; + +#ifdef SK_DEBUG +// Takes a pointer to a GrCaps, and will suppress prints if required +#define GrCapsDebugf(caps, ...) if (!(caps)->suppressPrints()) SkDebugf(__VA_ARGS__) +#else +#define GrCapsDebugf(caps, ...) do {} while (0) +#endif + +/** + * Specifies if the holder owns the backend, OpenGL or Vulkan, object. + */ +enum class GrBackendObjectOwnership : bool { + /** Holder does not destroy the backend object. */ + kBorrowed = false, + /** Holder destroys the backend object. */ + kOwned = true +}; + +/* + * Object for CPU-GPU synchronization + */ +typedef uint64_t GrFence; + +/** + * Used to include or exclude specific GPU path renderers for testing purposes. + */ +enum class GpuPathRenderers { + kNone = 0, // Always use software masks and/or DefaultPathRenderer. + kDashLine = 1 << 0, + kAtlas = 1 << 1, + kTessellation = 1 << 2, + kCoverageCounting = 1 << 3, + kAAHairline = 1 << 4, + kAAConvex = 1 << 5, + kAALinearizing = 1 << 6, + kSmall = 1 << 7, + kTriangulating = 1 << 8, + kDefault = ((1 << 9) - 1) // All path renderers. +}; + +/** + * Used to describe the current state of Mips on a GrTexture + */ +enum class GrMipmapStatus { + kNotAllocated, // Mips have not been allocated + kDirty, // Mips are allocated but the full mip tree does not have valid data + kValid, // All levels fully allocated and have valid data in them +}; + +GR_MAKE_BITFIELD_CLASS_OPS(GpuPathRenderers) + +/** + * Like SkColorType this describes a layout of pixel data in CPU memory. It specifies the channels, + * their type, and width. This exists so that the GPU backend can have private types that have no + * analog in the public facing SkColorType enum and omit types not implemented in the GPU backend. + * It does not refer to a texture format and the mapping to texture formats may be many-to-many. + * It does not specify the sRGB encoding of the stored values. The components are listed in order of + * where they appear in memory. In other words the first component listed is in the low bits and + * the last component in the high bits. + */ +enum class GrColorType { + kUnknown, + kAlpha_8, + kBGR_565, + kABGR_4444, // This name differs from SkColorType. kARGB_4444_SkColorType is misnamed. + kRGBA_8888, + kRGBA_8888_SRGB, + kRGB_888x, + kRG_88, + kBGRA_8888, + kRGBA_1010102, + kBGRA_1010102, + kGray_8, + kGrayAlpha_88, + kAlpha_F16, + kRGBA_F16, + kRGBA_F16_Clamped, + kRGBA_F32, + + kAlpha_16, + kRG_1616, + kRG_F16, + kRGBA_16161616, + + // Unusual types that come up after reading back in cases where we are reassigning the meaning + // of a texture format's channels to use for a particular color format but have to read back the + // data to a full RGBA quadruple. (e.g. using a R8 texture format as A8 color type but the API + // only supports reading to RGBA8.) None of these have SkColorType equivalents. + kAlpha_8xxx, + kAlpha_F32xxx, + kGray_8xxx, + kR_8xxx, + + // Types used to initialize backend textures. + kRGB_888, + kR_8, + kR_16, + kR_F16, + kGray_F16, + kBGRA_4444, + kARGB_4444, + + kLast = kARGB_4444 +}; + +static const int kGrColorTypeCnt = static_cast(GrColorType::kLast) + 1; + +static constexpr SkColorType GrColorTypeToSkColorType(GrColorType ct) { + switch (ct) { + case GrColorType::kUnknown: return kUnknown_SkColorType; + case GrColorType::kAlpha_8: return kAlpha_8_SkColorType; + case GrColorType::kBGR_565: return kRGB_565_SkColorType; + case GrColorType::kABGR_4444: return kARGB_4444_SkColorType; + case GrColorType::kRGBA_8888: return kRGBA_8888_SkColorType; + case GrColorType::kRGBA_8888_SRGB: return kSRGBA_8888_SkColorType; + case GrColorType::kRGB_888x: return kRGB_888x_SkColorType; + case GrColorType::kRG_88: return kR8G8_unorm_SkColorType; + case GrColorType::kBGRA_8888: return kBGRA_8888_SkColorType; + case GrColorType::kRGBA_1010102: return kRGBA_1010102_SkColorType; + case GrColorType::kBGRA_1010102: return kBGRA_1010102_SkColorType; + case GrColorType::kGray_8: return kGray_8_SkColorType; + case GrColorType::kGrayAlpha_88: return kUnknown_SkColorType; + case GrColorType::kAlpha_F16: return kA16_float_SkColorType; + case GrColorType::kRGBA_F16: return kRGBA_F16_SkColorType; + case GrColorType::kRGBA_F16_Clamped: return kRGBA_F16Norm_SkColorType; + case GrColorType::kRGBA_F32: return kRGBA_F32_SkColorType; + case GrColorType::kAlpha_8xxx: return kUnknown_SkColorType; + case GrColorType::kAlpha_F32xxx: return kUnknown_SkColorType; + case GrColorType::kGray_8xxx: return kUnknown_SkColorType; + case GrColorType::kR_8xxx: return kUnknown_SkColorType; + case GrColorType::kAlpha_16: return kA16_unorm_SkColorType; + case GrColorType::kRG_1616: return kR16G16_unorm_SkColorType; + case GrColorType::kRGBA_16161616: return kR16G16B16A16_unorm_SkColorType; + case GrColorType::kRG_F16: return kR16G16_float_SkColorType; + case GrColorType::kRGB_888: return kUnknown_SkColorType; + case GrColorType::kR_8: return kR8_unorm_SkColorType; + case GrColorType::kR_16: return kUnknown_SkColorType; + case GrColorType::kR_F16: return kUnknown_SkColorType; + case GrColorType::kGray_F16: return kUnknown_SkColorType; + case GrColorType::kARGB_4444: return kUnknown_SkColorType; + case GrColorType::kBGRA_4444: return kUnknown_SkColorType; + } + SkUNREACHABLE; +} + +static constexpr GrColorType SkColorTypeToGrColorType(SkColorType ct) { + switch (ct) { + case kUnknown_SkColorType: return GrColorType::kUnknown; + case kAlpha_8_SkColorType: return GrColorType::kAlpha_8; + case kRGB_565_SkColorType: return GrColorType::kBGR_565; + case kARGB_4444_SkColorType: return GrColorType::kABGR_4444; + case kRGBA_8888_SkColorType: return GrColorType::kRGBA_8888; + case kSRGBA_8888_SkColorType: return GrColorType::kRGBA_8888_SRGB; + case kRGB_888x_SkColorType: return GrColorType::kRGB_888x; + case kBGRA_8888_SkColorType: return GrColorType::kBGRA_8888; + case kGray_8_SkColorType: return GrColorType::kGray_8; + case kRGBA_F16Norm_SkColorType: return GrColorType::kRGBA_F16_Clamped; + case kRGBA_F16_SkColorType: return GrColorType::kRGBA_F16; + case kRGBA_1010102_SkColorType: return GrColorType::kRGBA_1010102; + case kRGB_101010x_SkColorType: return GrColorType::kUnknown; + case kBGRA_1010102_SkColorType: return GrColorType::kBGRA_1010102; + case kBGR_101010x_SkColorType: return GrColorType::kUnknown; + case kBGR_101010x_XR_SkColorType: return GrColorType::kUnknown; + case kRGBA_F32_SkColorType: return GrColorType::kRGBA_F32; + case kR8G8_unorm_SkColorType: return GrColorType::kRG_88; + case kA16_unorm_SkColorType: return GrColorType::kAlpha_16; + case kR16G16_unorm_SkColorType: return GrColorType::kRG_1616; + case kA16_float_SkColorType: return GrColorType::kAlpha_F16; + case kR16G16_float_SkColorType: return GrColorType::kRG_F16; + case kR16G16B16A16_unorm_SkColorType: return GrColorType::kRGBA_16161616; + case kR8_unorm_SkColorType: return GrColorType::kR_8; + } + SkUNREACHABLE; +} + +static constexpr uint32_t GrColorTypeChannelFlags(GrColorType ct) { + switch (ct) { + case GrColorType::kUnknown: return 0; + case GrColorType::kAlpha_8: return kAlpha_SkColorChannelFlag; + case GrColorType::kBGR_565: return kRGB_SkColorChannelFlags; + case GrColorType::kABGR_4444: return kRGBA_SkColorChannelFlags; + case GrColorType::kRGBA_8888: return kRGBA_SkColorChannelFlags; + case GrColorType::kRGBA_8888_SRGB: return kRGBA_SkColorChannelFlags; + case GrColorType::kRGB_888x: return kRGB_SkColorChannelFlags; + case GrColorType::kRG_88: return kRG_SkColorChannelFlags; + case GrColorType::kBGRA_8888: return kRGBA_SkColorChannelFlags; + case GrColorType::kRGBA_1010102: return kRGBA_SkColorChannelFlags; + case GrColorType::kBGRA_1010102: return kRGBA_SkColorChannelFlags; + case GrColorType::kGray_8: return kGray_SkColorChannelFlag; + case GrColorType::kGrayAlpha_88: return kGrayAlpha_SkColorChannelFlags; + case GrColorType::kAlpha_F16: return kAlpha_SkColorChannelFlag; + case GrColorType::kRGBA_F16: return kRGBA_SkColorChannelFlags; + case GrColorType::kRGBA_F16_Clamped: return kRGBA_SkColorChannelFlags; + case GrColorType::kRGBA_F32: return kRGBA_SkColorChannelFlags; + case GrColorType::kAlpha_8xxx: return kAlpha_SkColorChannelFlag; + case GrColorType::kAlpha_F32xxx: return kAlpha_SkColorChannelFlag; + case GrColorType::kGray_8xxx: return kGray_SkColorChannelFlag; + case GrColorType::kR_8xxx: return kRed_SkColorChannelFlag; + case GrColorType::kAlpha_16: return kAlpha_SkColorChannelFlag; + case GrColorType::kRG_1616: return kRG_SkColorChannelFlags; + case GrColorType::kRGBA_16161616: return kRGBA_SkColorChannelFlags; + case GrColorType::kRG_F16: return kRG_SkColorChannelFlags; + case GrColorType::kRGB_888: return kRGB_SkColorChannelFlags; + case GrColorType::kR_8: return kRed_SkColorChannelFlag; + case GrColorType::kR_16: return kRed_SkColorChannelFlag; + case GrColorType::kR_F16: return kRed_SkColorChannelFlag; + case GrColorType::kGray_F16: return kGray_SkColorChannelFlag; + case GrColorType::kARGB_4444: return kRGBA_SkColorChannelFlags; + case GrColorType::kBGRA_4444: return kRGBA_SkColorChannelFlags; + } + SkUNREACHABLE; +} + +/** + * Describes the encoding of channel data in a GrColorType. + */ +enum class GrColorTypeEncoding { + kUnorm, + kSRGBUnorm, + // kSnorm, + kFloat, + // kSint + // kUint +}; + +/** + * Describes a GrColorType by how many bits are used for each color component and how they are + * encoded. Currently all the non-zero channels share a single GrColorTypeEncoding. This could be + * expanded to store separate encodings and to indicate which bits belong to which components. + */ +class GrColorFormatDesc { +public: + static constexpr GrColorFormatDesc MakeRGBA(int rgba, GrColorTypeEncoding e) { + return {rgba, rgba, rgba, rgba, 0, e}; + } + + static constexpr GrColorFormatDesc MakeRGBA(int rgb, int a, GrColorTypeEncoding e) { + return {rgb, rgb, rgb, a, 0, e}; + } + + static constexpr GrColorFormatDesc MakeRGB(int rgb, GrColorTypeEncoding e) { + return {rgb, rgb, rgb, 0, 0, e}; + } + + static constexpr GrColorFormatDesc MakeRGB(int r, int g, int b, GrColorTypeEncoding e) { + return {r, g, b, 0, 0, e}; + } + + static constexpr GrColorFormatDesc MakeAlpha(int a, GrColorTypeEncoding e) { + return {0, 0, 0, a, 0, e}; + } + + static constexpr GrColorFormatDesc MakeR(int r, GrColorTypeEncoding e) { + return {r, 0, 0, 0, 0, e}; + } + + static constexpr GrColorFormatDesc MakeRG(int rg, GrColorTypeEncoding e) { + return {rg, rg, 0, 0, 0, e}; + } + + static constexpr GrColorFormatDesc MakeGray(int grayBits, GrColorTypeEncoding e) { + return {0, 0, 0, 0, grayBits, e}; + } + + static constexpr GrColorFormatDesc MakeGrayAlpha(int grayAlpha, GrColorTypeEncoding e) { + return {0, 0, 0, 0, grayAlpha, e}; + } + + static constexpr GrColorFormatDesc MakeInvalid() { return {}; } + + constexpr int r() const { return fRBits; } + constexpr int g() const { return fGBits; } + constexpr int b() const { return fBBits; } + constexpr int a() const { return fABits; } + constexpr int operator[](int c) const { + switch (c) { + case 0: return this->r(); + case 1: return this->g(); + case 2: return this->b(); + case 3: return this->a(); + } + SkUNREACHABLE; + } + + constexpr int gray() const { return fGrayBits; } + + constexpr GrColorTypeEncoding encoding() const { return fEncoding; } + +private: + int fRBits = 0; + int fGBits = 0; + int fBBits = 0; + int fABits = 0; + int fGrayBits = 0; + GrColorTypeEncoding fEncoding = GrColorTypeEncoding::kUnorm; + + constexpr GrColorFormatDesc() = default; + + constexpr GrColorFormatDesc(int r, int g, int b, int a, int gray, GrColorTypeEncoding encoding) + : fRBits(r), fGBits(g), fBBits(b), fABits(a), fGrayBits(gray), fEncoding(encoding) { + SkASSERT(r >= 0 && g >= 0 && b >= 0 && a >= 0 && gray >= 0); + SkASSERT(!gray || (!r && !g && !b)); + SkASSERT(r || g || b || a || gray); + } +}; + +static constexpr GrColorFormatDesc GrGetColorTypeDesc(GrColorType ct) { + switch (ct) { + case GrColorType::kUnknown: + return GrColorFormatDesc::MakeInvalid(); + case GrColorType::kAlpha_8: + return GrColorFormatDesc::MakeAlpha(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kBGR_565: + return GrColorFormatDesc::MakeRGB(5, 6, 5, GrColorTypeEncoding::kUnorm); + case GrColorType::kABGR_4444: + return GrColorFormatDesc::MakeRGBA(4, GrColorTypeEncoding::kUnorm); + case GrColorType::kRGBA_8888: + return GrColorFormatDesc::MakeRGBA(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kRGBA_8888_SRGB: + return GrColorFormatDesc::MakeRGBA(8, GrColorTypeEncoding::kSRGBUnorm); + case GrColorType::kRGB_888x: + return GrColorFormatDesc::MakeRGB(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kRG_88: + return GrColorFormatDesc::MakeRG(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kBGRA_8888: + return GrColorFormatDesc::MakeRGBA(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kRGBA_1010102: + return GrColorFormatDesc::MakeRGBA(10, 2, GrColorTypeEncoding::kUnorm); + case GrColorType::kBGRA_1010102: + return GrColorFormatDesc::MakeRGBA(10, 2, GrColorTypeEncoding::kUnorm); + case GrColorType::kGray_8: + return GrColorFormatDesc::MakeGray(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kGrayAlpha_88: + return GrColorFormatDesc::MakeGrayAlpha(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kAlpha_F16: + return GrColorFormatDesc::MakeAlpha(16, GrColorTypeEncoding::kFloat); + case GrColorType::kRGBA_F16: + return GrColorFormatDesc::MakeRGBA(16, GrColorTypeEncoding::kFloat); + case GrColorType::kRGBA_F16_Clamped: + return GrColorFormatDesc::MakeRGBA(16, GrColorTypeEncoding::kFloat); + case GrColorType::kRGBA_F32: + return GrColorFormatDesc::MakeRGBA(32, GrColorTypeEncoding::kFloat); + case GrColorType::kAlpha_8xxx: + return GrColorFormatDesc::MakeAlpha(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kAlpha_F32xxx: + return GrColorFormatDesc::MakeAlpha(32, GrColorTypeEncoding::kFloat); + case GrColorType::kGray_8xxx: + return GrColorFormatDesc::MakeGray(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kR_8xxx: + return GrColorFormatDesc::MakeR(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kAlpha_16: + return GrColorFormatDesc::MakeAlpha(16, GrColorTypeEncoding::kUnorm); + case GrColorType::kRG_1616: + return GrColorFormatDesc::MakeRG(16, GrColorTypeEncoding::kUnorm); + case GrColorType::kRGBA_16161616: + return GrColorFormatDesc::MakeRGBA(16, GrColorTypeEncoding::kUnorm); + case GrColorType::kRG_F16: + return GrColorFormatDesc::MakeRG(16, GrColorTypeEncoding::kFloat); + case GrColorType::kRGB_888: + return GrColorFormatDesc::MakeRGB(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kR_8: + return GrColorFormatDesc::MakeR(8, GrColorTypeEncoding::kUnorm); + case GrColorType::kR_16: + return GrColorFormatDesc::MakeR(16, GrColorTypeEncoding::kUnorm); + case GrColorType::kR_F16: + return GrColorFormatDesc::MakeR(16, GrColorTypeEncoding::kFloat); + case GrColorType::kGray_F16: + return GrColorFormatDesc::MakeGray(16, GrColorTypeEncoding::kFloat); + case GrColorType::kARGB_4444: + return GrColorFormatDesc::MakeRGBA(4, GrColorTypeEncoding::kUnorm); + case GrColorType::kBGRA_4444: + return GrColorFormatDesc::MakeRGBA(4, GrColorTypeEncoding::kUnorm); + } + SkUNREACHABLE; +} + +static constexpr GrClampType GrColorTypeClampType(GrColorType colorType) { + if (GrGetColorTypeDesc(colorType).encoding() == GrColorTypeEncoding::kUnorm || + GrGetColorTypeDesc(colorType).encoding() == GrColorTypeEncoding::kSRGBUnorm) { + return GrClampType::kAuto; + } + return GrColorType::kRGBA_F16_Clamped == colorType ? GrClampType::kManual : GrClampType::kNone; +} + +// Consider a color type "wider" than n if it has more than n bits for any its representable +// channels. +static constexpr bool GrColorTypeIsWiderThan(GrColorType colorType, int n) { + SkASSERT(n > 0); + auto desc = GrGetColorTypeDesc(colorType); + return (desc.r() && desc.r() > n )|| + (desc.g() && desc.g() > n) || + (desc.b() && desc.b() > n) || + (desc.a() && desc.a() > n) || + (desc.gray() && desc.gray() > n); +} + +static constexpr bool GrColorTypeIsAlphaOnly(GrColorType ct) { + return GrColorTypeChannelFlags(ct) == kAlpha_SkColorChannelFlag; +} + +static constexpr bool GrColorTypeHasAlpha(GrColorType ct) { + return GrColorTypeChannelFlags(ct) & kAlpha_SkColorChannelFlag; +} + +static constexpr size_t GrColorTypeBytesPerPixel(GrColorType ct) { + switch (ct) { + case GrColorType::kUnknown: return 0; + case GrColorType::kAlpha_8: return 1; + case GrColorType::kBGR_565: return 2; + case GrColorType::kABGR_4444: return 2; + case GrColorType::kRGBA_8888: return 4; + case GrColorType::kRGBA_8888_SRGB: return 4; + case GrColorType::kRGB_888x: return 4; + case GrColorType::kRG_88: return 2; + case GrColorType::kBGRA_8888: return 4; + case GrColorType::kRGBA_1010102: return 4; + case GrColorType::kBGRA_1010102: return 4; + case GrColorType::kGray_8: return 1; + case GrColorType::kGrayAlpha_88: return 2; + case GrColorType::kAlpha_F16: return 2; + case GrColorType::kRGBA_F16: return 8; + case GrColorType::kRGBA_F16_Clamped: return 8; + case GrColorType::kRGBA_F32: return 16; + case GrColorType::kAlpha_8xxx: return 4; + case GrColorType::kAlpha_F32xxx: return 16; + case GrColorType::kGray_8xxx: return 4; + case GrColorType::kR_8xxx: return 4; + case GrColorType::kAlpha_16: return 2; + case GrColorType::kRG_1616: return 4; + case GrColorType::kRGBA_16161616: return 8; + case GrColorType::kRG_F16: return 4; + case GrColorType::kRGB_888: return 3; + case GrColorType::kR_8: return 1; + case GrColorType::kR_16: return 2; + case GrColorType::kR_F16: return 2; + case GrColorType::kGray_F16: return 2; + case GrColorType::kARGB_4444: return 2; + case GrColorType::kBGRA_4444: return 2; + } + SkUNREACHABLE; +} + +// In general we try to not mix CompressionType and ColorType, but currently SkImage still requires +// an SkColorType even for CompressedTypes so we need some conversion. +static constexpr SkColorType GrCompressionTypeToSkColorType(SkTextureCompressionType compression) { + switch (compression) { + case SkTextureCompressionType::kNone: return kUnknown_SkColorType; + case SkTextureCompressionType::kETC2_RGB8_UNORM: return kRGB_888x_SkColorType; + case SkTextureCompressionType::kBC1_RGB8_UNORM: return kRGB_888x_SkColorType; + case SkTextureCompressionType::kBC1_RGBA8_UNORM: return kRGBA_8888_SkColorType; + } + + SkUNREACHABLE; +} + +enum class GrDstSampleFlags { + kNone = 0, + kRequiresTextureBarrier = 1 << 0, + kAsInputAttachment = 1 << 1, +}; +GR_MAKE_BITFIELD_CLASS_OPS(GrDstSampleFlags) + +using GrVisitProxyFunc = std::function; + +#if defined(SK_DEBUG) || GR_TEST_UTILS || defined(SK_ENABLE_DUMP_GPU) +static constexpr const char* GrBackendApiToStr(GrBackendApi api) { + switch (api) { + case GrBackendApi::kOpenGL: return "OpenGL"; + case GrBackendApi::kVulkan: return "Vulkan"; + case GrBackendApi::kMetal: return "Metal"; + case GrBackendApi::kDirect3D: return "Direct3D"; + case GrBackendApi::kDawn: return "Dawn"; + case GrBackendApi::kMock: return "Mock"; + } + SkUNREACHABLE; +} + +static constexpr const char* GrColorTypeToStr(GrColorType ct) { + switch (ct) { + case GrColorType::kUnknown: return "kUnknown"; + case GrColorType::kAlpha_8: return "kAlpha_8"; + case GrColorType::kBGR_565: return "kRGB_565"; + case GrColorType::kABGR_4444: return "kABGR_4444"; + case GrColorType::kRGBA_8888: return "kRGBA_8888"; + case GrColorType::kRGBA_8888_SRGB: return "kRGBA_8888_SRGB"; + case GrColorType::kRGB_888x: return "kRGB_888x"; + case GrColorType::kRG_88: return "kRG_88"; + case GrColorType::kBGRA_8888: return "kBGRA_8888"; + case GrColorType::kRGBA_1010102: return "kRGBA_1010102"; + case GrColorType::kBGRA_1010102: return "kBGRA_1010102"; + case GrColorType::kGray_8: return "kGray_8"; + case GrColorType::kGrayAlpha_88: return "kGrayAlpha_88"; + case GrColorType::kAlpha_F16: return "kAlpha_F16"; + case GrColorType::kRGBA_F16: return "kRGBA_F16"; + case GrColorType::kRGBA_F16_Clamped: return "kRGBA_F16_Clamped"; + case GrColorType::kRGBA_F32: return "kRGBA_F32"; + case GrColorType::kAlpha_8xxx: return "kAlpha_8xxx"; + case GrColorType::kAlpha_F32xxx: return "kAlpha_F32xxx"; + case GrColorType::kGray_8xxx: return "kGray_8xxx"; + case GrColorType::kR_8xxx: return "kR_8xxx"; + case GrColorType::kAlpha_16: return "kAlpha_16"; + case GrColorType::kRG_1616: return "kRG_1616"; + case GrColorType::kRGBA_16161616: return "kRGBA_16161616"; + case GrColorType::kRG_F16: return "kRG_F16"; + case GrColorType::kRGB_888: return "kRGB_888"; + case GrColorType::kR_8: return "kR_8"; + case GrColorType::kR_16: return "kR_16"; + case GrColorType::kR_F16: return "kR_F16"; + case GrColorType::kGray_F16: return "kGray_F16"; + case GrColorType::kARGB_4444: return "kARGB_4444"; + case GrColorType::kBGRA_4444: return "kBGRA_4444"; + } + SkUNREACHABLE; +} + +static constexpr const char* GrCompressionTypeToStr(SkTextureCompressionType compression) { + switch (compression) { + case SkTextureCompressionType::kNone: return "kNone"; + case SkTextureCompressionType::kETC2_RGB8_UNORM: return "kETC2_RGB8_UNORM"; + case SkTextureCompressionType::kBC1_RGB8_UNORM: return "kBC1_RGB8_UNORM"; + case SkTextureCompressionType::kBC1_RGBA8_UNORM: return "kBC1_RGBA8_UNORM"; + } + SkUNREACHABLE; +} + +static constexpr const char* GrSurfaceOriginToStr(GrSurfaceOrigin origin) { + switch (origin) { + case kTopLeft_GrSurfaceOrigin: return "kTopLeft"; + case kBottomLeft_GrSurfaceOrigin: return "kBottomLeft"; + } + SkUNREACHABLE; +} +#endif + +#endif diff --git a/gfx/skia/skia/include/private/gpu/ganesh/GrVkTypesPriv.h b/gfx/skia/skia/include/private/gpu/ganesh/GrVkTypesPriv.h new file mode 100644 index 0000000000..f300a71396 --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/ganesh/GrVkTypesPriv.h @@ -0,0 +1,73 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef GrVkTypesPriv_DEFINED +#define GrVkTypesPriv_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/gpu/vk/GrVkTypes.h" + +namespace skgpu { +class MutableTextureStateRef; +} + + +// This struct is to used to store the the actual information about the vulkan backend image on the +// GrBackendTexture and GrBackendRenderTarget. When a client calls getVkImageInfo on a +// GrBackendTexture/RenderTarget, we use the GrVkBackendSurfaceInfo to create a snapshot +// GrVkImgeInfo object. Internally, this uses a ref count GrVkImageLayout object to track the +// current VkImageLayout which can be shared with an internal GrVkImage so that layout updates can +// be seen by all users of the image. +struct GrVkBackendSurfaceInfo { + GrVkBackendSurfaceInfo(GrVkImageInfo info) : fImageInfo(info) {} + + void cleanup(); + + GrVkBackendSurfaceInfo& operator=(const GrVkBackendSurfaceInfo&) = delete; + + // Assigns the passed in GrVkBackendSurfaceInfo to this object. if isValid is true we will also + // attempt to unref the old fLayout on this object. + void assign(const GrVkBackendSurfaceInfo&, bool isValid); + + GrVkImageInfo snapImageInfo(const skgpu::MutableTextureStateRef*) const; + + bool isProtected() const { return fImageInfo.fProtected == skgpu::Protected::kYes; } +#if GR_TEST_UTILS + bool operator==(const GrVkBackendSurfaceInfo& that) const; +#endif + +private: + GrVkImageInfo fImageInfo; +}; + +struct GrVkImageSpec { + GrVkImageSpec() + : fImageTiling(VK_IMAGE_TILING_OPTIMAL) + , fFormat(VK_FORMAT_UNDEFINED) + , fImageUsageFlags(0) + , fSharingMode(VK_SHARING_MODE_EXCLUSIVE) {} + + GrVkImageSpec(const GrVkSurfaceInfo& info) + : fImageTiling(info.fImageTiling) + , fFormat(info.fFormat) + , fImageUsageFlags(info.fImageUsageFlags) + , fYcbcrConversionInfo(info.fYcbcrConversionInfo) + , fSharingMode(info.fSharingMode) {} + + VkImageTiling fImageTiling; + VkFormat fFormat; + VkImageUsageFlags fImageUsageFlags; + GrVkYcbcrConversionInfo fYcbcrConversionInfo; + VkSharingMode fSharingMode; +}; + +GrVkSurfaceInfo GrVkImageSpecToSurfaceInfo(const GrVkImageSpec& vkSpec, + uint32_t sampleCount, + uint32_t levelCount, + skgpu::Protected isProtected); + +#endif diff --git a/gfx/skia/skia/include/private/gpu/graphite/DawnTypesPriv.h b/gfx/skia/skia/include/private/gpu/graphite/DawnTypesPriv.h new file mode 100644 index 0000000000..bbf401c95e --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/graphite/DawnTypesPriv.h @@ -0,0 +1,38 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_DawnTypesPriv_DEFINED +#define skgpu_graphite_DawnTypesPriv_DEFINED + +#include "include/gpu/graphite/dawn/DawnTypes.h" + +namespace skgpu::graphite { + +struct DawnTextureSpec { + DawnTextureSpec() + : fFormat(wgpu::TextureFormat::Undefined) + , fUsage(wgpu::TextureUsage::None) {} + DawnTextureSpec(const DawnTextureInfo& info) + : fFormat(info.fFormat) + , fUsage(info.fUsage) {} + + bool operator==(const DawnTextureSpec& that) const { + return fUsage == that.fUsage && + fFormat == that.fFormat; + } + + wgpu::TextureFormat fFormat; + wgpu::TextureUsage fUsage; +}; + +DawnTextureInfo DawnTextureSpecToTextureInfo(const DawnTextureSpec& dawnSpec, + uint32_t sampleCount, + Mipmapped mipmapped); + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_DawnTypesPriv_DEFINED diff --git a/gfx/skia/skia/include/private/gpu/graphite/MtlGraphiteTypesPriv.h b/gfx/skia/skia/include/private/gpu/graphite/MtlGraphiteTypesPriv.h new file mode 100644 index 0000000000..bf26aa2a78 --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/graphite/MtlGraphiteTypesPriv.h @@ -0,0 +1,74 @@ +/* + * Copyright 2021 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_MtlGraphiteTypesPriv_DEFINED +#define skgpu_graphite_MtlGraphiteTypesPriv_DEFINED + +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/gpu/graphite/mtl/MtlGraphiteTypes.h" + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef __APPLE__ + +#include + +// We're using the MSL version as shorthand for the Metal SDK version here +#if defined(SK_BUILD_FOR_MAC) +#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 110000 +#define GR_METAL_SDK_VERSION 230 +#elif __MAC_OS_X_VERSION_MAX_ALLOWED >= 120000 +#define GR_METAL_SDK_VERSION 240 +#else +#error Must use at least 11.00 SDK to build Metal backend for MacOS +#endif +#else +#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 140000 || __TV_OS_VERSION_MAX_ALLOWED >= 140000 +#define GR_METAL_SDK_VERSION 230 +#elif __IPHONE_OS_VERSION_MAX_ALLOWED >= 150000 || __TV_OS_VERSION_MAX_ALLOWED >= 150000 +#define GR_METAL_SDK_VERSION 240 +#else +#error Must use at least 14.00 SDK to build Metal backend for iOS +#endif +#endif + +#endif // __APPLE__ + +namespace skgpu::graphite { + +struct MtlTextureSpec { + MtlTextureSpec() + : fFormat(0) + , fUsage(0) + , fStorageMode(0) + , fFramebufferOnly(false) {} + MtlTextureSpec(const MtlTextureInfo& info) + : fFormat(info.fFormat) + , fUsage(info.fUsage) + , fStorageMode(info.fStorageMode) + , fFramebufferOnly(info.fFramebufferOnly) {} + + bool operator==(const MtlTextureSpec& that) const { + return fFormat == that.fFormat && + fUsage == that.fUsage && + fStorageMode == that.fStorageMode && + fFramebufferOnly == that.fFramebufferOnly; + } + + MtlPixelFormat fFormat; + MtlTextureUsage fUsage; + MtlStorageMode fStorageMode; + bool fFramebufferOnly; +}; + +MtlTextureInfo MtlTextureSpecToTextureInfo(const MtlTextureSpec& mtlSpec, + uint32_t sampleCount, + Mipmapped mipmapped); + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_MtlGraphiteTypesPriv_DEFINED diff --git a/gfx/skia/skia/include/private/gpu/graphite/VulkanGraphiteTypesPriv.h b/gfx/skia/skia/include/private/gpu/graphite/VulkanGraphiteTypesPriv.h new file mode 100644 index 0000000000..b4304e3ae8 --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/graphite/VulkanGraphiteTypesPriv.h @@ -0,0 +1,55 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_graphite_VulkanGraphiteTypesPriv_DEFINED +#define skgpu_graphite_VulkanGraphiteTypesPriv_DEFINED + +#include "include/gpu/graphite/vk/VulkanGraphiteTypes.h" + +namespace skgpu::graphite { + +struct VulkanTextureSpec { + VulkanTextureSpec() + : fFlags(0) + , fFormat(VK_FORMAT_UNDEFINED) + , fImageTiling(VK_IMAGE_TILING_OPTIMAL) + , fImageUsageFlags(0) + , fSharingMode(VK_SHARING_MODE_EXCLUSIVE) + , fAspectMask(VK_IMAGE_ASPECT_COLOR_BIT) {} + VulkanTextureSpec(const VulkanTextureInfo& info) + : fFlags(info.fFlags) + , fFormat(info.fFormat) + , fImageTiling(info.fImageTiling) + , fImageUsageFlags(info.fImageUsageFlags) + , fSharingMode(info.fSharingMode) + , fAspectMask(info.fAspectMask) {} + + bool operator==(const VulkanTextureSpec& that) const { + return fFlags == that.fFlags && + fFormat == that.fFormat && + fImageTiling == that.fImageTiling && + fImageUsageFlags == that.fImageUsageFlags && + fSharingMode == that.fSharingMode && + fAspectMask == that.fAspectMask; + } + + VkImageCreateFlags fFlags; + VkFormat fFormat; + VkImageTiling fImageTiling; + VkImageUsageFlags fImageUsageFlags; + VkSharingMode fSharingMode; + VkImageAspectFlags fAspectMask; + // GrVkYcbcrConversionInfo fYcbcrConversionInfo; +}; + +VulkanTextureInfo VulkanTextureSpecToTextureInfo(const VulkanTextureSpec& vkSpec, + uint32_t sampleCount, + Mipmapped mipmapped); + +} // namespace skgpu::graphite + +#endif // skgpu_graphite_VulkanGraphiteTypesPriv_DEFINED diff --git a/gfx/skia/skia/include/private/gpu/vk/SkiaVulkan.h b/gfx/skia/skia/include/private/gpu/vk/SkiaVulkan.h new file mode 100644 index 0000000000..ca4bcf108b --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/vk/SkiaVulkan.h @@ -0,0 +1,36 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkiaVulkan_DEFINED +#define SkiaVulkan_DEFINED + +#include "include/core/SkTypes.h" + +// IWYU pragma: begin_exports + +#if SKIA_IMPLEMENTATION || !defined(SK_VULKAN) +#include "include/third_party/vulkan/vulkan/vulkan_core.h" +#else +// For google3 builds we don't set SKIA_IMPLEMENTATION so we need to make sure that the vulkan +// headers stay up to date for our needs +#include +#endif + +#ifdef SK_BUILD_FOR_ANDROID +// This is needed to get android extensions for external memory +#if SKIA_IMPLEMENTATION || !defined(SK_VULKAN) +#include "include/third_party/vulkan/vulkan/vulkan_android.h" +#else +// For google3 builds we don't set SKIA_IMPLEMENTATION so we need to make sure that the vulkan +// headers stay up to date for our needs +#include +#endif +#endif + +// IWYU pragma: end_exports + +#endif diff --git a/gfx/skia/skia/include/private/gpu/vk/VulkanTypesPriv.h b/gfx/skia/skia/include/private/gpu/vk/VulkanTypesPriv.h new file mode 100644 index 0000000000..e99869ca1a --- /dev/null +++ b/gfx/skia/skia/include/private/gpu/vk/VulkanTypesPriv.h @@ -0,0 +1,57 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef skgpu_VulkanTypesPriv_DEFINED +#define skgpu_VulkanTypesPriv_DEFINED + +#include "include/gpu/vk/VulkanTypes.h" + +#include + +namespace skgpu { + +class VulkanMutableTextureState { +public: + VulkanMutableTextureState(VkImageLayout layout, uint32_t queueFamilyIndex) + : fLayout(layout) + , fQueueFamilyIndex(queueFamilyIndex) {} + + VulkanMutableTextureState& operator=(const VulkanMutableTextureState& that) { + fLayout = that.getImageLayout(); + fQueueFamilyIndex = that.getQueueFamilyIndex(); + return *this; + } + + void setImageLayout(VkImageLayout layout) { + // Defaulting to use std::memory_order_seq_cst + fLayout.store(layout); + } + + VkImageLayout getImageLayout() const { + // Defaulting to use std::memory_order_seq_cst + return fLayout.load(); + } + + void setQueueFamilyIndex(uint32_t queueFamilyIndex) { + // Defaulting to use std::memory_order_seq_cst + fQueueFamilyIndex.store(queueFamilyIndex); + } + + uint32_t getQueueFamilyIndex() const { + // Defaulting to use std::memory_order_seq_cst + return fQueueFamilyIndex.load(); + } + +private: + std::atomic fLayout; + std::atomic fQueueFamilyIndex; +}; + +} // namespace skgpu + +#endif // skgpu_VulkanGraphiteTypesPriv_DEFINED + diff --git a/gfx/skia/skia/include/sksl/DSL.h b/gfx/skia/skia/include/sksl/DSL.h new file mode 100644 index 0000000000..6b9ebd4727 --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSL.h @@ -0,0 +1,37 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL +#define SKSL_DSL + +#include "include/sksl/DSLBlock.h" +#include "include/sksl/DSLCore.h" +#include "include/sksl/DSLExpression.h" +#include "include/sksl/DSLFunction.h" +#include "include/sksl/DSLType.h" + +namespace SkSL { + +namespace dsl { + +using Block = DSLBlock; +using Case = DSLCase; +using Expression = DSLExpression; +using Field = DSLField; +using Function = DSLFunction; +using GlobalVar = DSLGlobalVar; +using Layout = DSLLayout; +using Modifiers = DSLModifiers; +using Parameter = DSLParameter; +using Statement = DSLStatement; +using Var = DSLVar; + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLBlock.h b/gfx/skia/skia/include/sksl/DSLBlock.h new file mode 100644 index 0000000000..233236ae1e --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLBlock.h @@ -0,0 +1,58 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_BLOCK +#define SKSL_DSL_BLOCK + +#include "include/private/SkSLDefines.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/DSLStatement.h" +#include "include/sksl/SkSLPosition.h" + +#include + +namespace SkSL { + +class Block; +class SymbolTable; + +namespace dsl { + +class DSLBlock { +public: + template + DSLBlock(Statements... statements) { + fStatements.reserve_back(sizeof...(statements)); + ((void)fStatements.push_back(DSLStatement(statements.release()).release()), ...); + } + + DSLBlock(SkSL::StatementArray statements, std::shared_ptr symbols = nullptr, + Position pos = {}); + + DSLBlock(SkTArray statements, std::shared_ptr symbols = nullptr, + Position pos = {}); + + DSLBlock(DSLBlock&& other) = default; + DSLBlock& operator=(DSLBlock&& other) = default; + + ~DSLBlock() = default; + + void append(DSLStatement stmt); + + std::unique_ptr release(); + +private: + SkSL::StatementArray fStatements; + std::shared_ptr fSymbols; + Position fPosition; +}; + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLCase.h b/gfx/skia/skia/include/sksl/DSLCase.h new file mode 100644 index 0000000000..06e7225f11 --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLCase.h @@ -0,0 +1,62 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_CASE +#define SKSL_DSL_CASE + +#include "include/private/SkSLDefines.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/DSLExpression.h" +#include "include/sksl/DSLStatement.h" +#include "include/sksl/SkSLPosition.h" + +#include + +namespace SkSL { + +namespace dsl { + +class DSLCase { +public: + // An empty expression means 'default:'. + template + DSLCase(DSLExpression value, Statements... statements) + : fValue(std::move(value)) { + fStatements.reserve_back(sizeof...(statements)); + ((void)fStatements.push_back(DSLStatement(std::move(statements)).release()), ...); + } + + DSLCase(DSLExpression value, SkTArray statements, + Position pos = {}); + + DSLCase(DSLExpression value, SkSL::StatementArray statements, + Position pos = {}); + + DSLCase(DSLCase&&); + + ~DSLCase(); + + DSLCase& operator=(DSLCase&&); + + void append(DSLStatement stmt); + +private: + DSLExpression fValue; + SkSL::StatementArray fStatements; + Position fPosition; + + friend class DSLCore; + + template + friend DSLStatement Switch(DSLExpression value, Cases... cases); +}; + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLCore.h b/gfx/skia/skia/include/sksl/DSLCore.h new file mode 100644 index 0000000000..3d3408c307 --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLCore.h @@ -0,0 +1,468 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_CORE +#define SKSL_DSL_CORE + +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLProgramKind.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/DSLCase.h" +#include "include/sksl/DSLExpression.h" +#include "include/sksl/DSLStatement.h" +#include "include/sksl/DSLVar.h" // IWYU pragma: keep +#include "include/sksl/SkSLPosition.h" + +#include +#include +#include +#include + +namespace SkSL { + +class Compiler; +class ErrorReporter; +struct Program; +struct ProgramSettings; + +namespace dsl { + +class DSLField; +class DSLModifiers; + +// When users import the DSL namespace via `using namespace SkSL::dsl`, we want the SwizzleComponent +// Type enum to come into scope as well, so `Swizzle(var, X, Y, ONE)` can work as expected. +// `namespace SkSL::SwizzleComponent` contains only an `enum Type`; this `using namespace` directive +// shouldn't pollute the SkSL::dsl namespace with anything else. +using namespace SkSL::SwizzleComponent; + +/** + * Starts DSL output on the current thread using the specified compiler. This must be called + * prior to any other DSL functions. + */ +void Start(SkSL::Compiler* compiler, SkSL::ProgramKind kind = SkSL::ProgramKind::kFragment); + +void Start(SkSL::Compiler* compiler, SkSL::ProgramKind kind, const SkSL::ProgramSettings& settings); + +/** + * Signals the end of DSL output. This must be called sometime between a call to Start() and the + * termination of the thread. + */ +void End(); + +/** + * Returns all global elements (functions and global variables) as a self-contained Program. The + * optional source string is retained as the program's source. DSL programs do not normally have + * sources, but when a DSL program is produced from parsed program text (as in Parser), it may be + * important to retain it so that any std::string_views derived from it remain valid. + */ +std::unique_ptr ReleaseProgram(std::unique_ptr source = nullptr); + +/** + * Returns the ErrorReporter which will be notified of any errors that occur during DSL calls. The + * default error reporter aborts on any error. + */ +ErrorReporter& GetErrorReporter(); + +/** + * Installs an ErrorReporter which will be notified of any errors that occur during DSL calls. + */ +void SetErrorReporter(ErrorReporter* errorReporter); + +/** + * #extension : enable + */ +void AddExtension(std::string_view name, Position pos = {}); + +/** + * break; + */ +DSLStatement Break(Position pos = {}); + +/** + * continue; + */ +DSLStatement Continue(Position pos = {}); + +/** + * Adds a modifiers declaration to the current program. + */ +void Declare(const DSLModifiers& modifiers, Position pos = {}); + +/** + * Creates a local variable declaration statement. + */ +DSLStatement Declare(DSLVar& var, Position pos = {}); + +/** + * Creates a local variable declaration statement containing multiple variables. + */ +DSLStatement Declare(SkTArray& vars, Position pos = {}); + +/** + * Declares a global variable. + */ +void Declare(DSLGlobalVar& var, Position pos = {}); + +/** + * Declares a set of global variables. + */ +void Declare(SkTArray& vars, Position pos = {}); + +/** + * default: statements + */ +template +DSLCase Default(Statements... statements) { + return DSLCase(DSLExpression(), std::move(statements)...); +} + +/** + * discard; + */ +DSLStatement Discard(Position pos = {}); + +/** + * do stmt; while (test); + */ +DSLStatement Do(DSLStatement stmt, DSLExpression test, Position pos = {}); + +/** + * for (initializer; test; next) stmt; + */ +DSLStatement For(DSLStatement initializer, DSLExpression test, DSLExpression next, + DSLStatement stmt, Position pos = {}, ForLoopPositions positions = {}); + +/** + * if (test) ifTrue; [else ifFalse;] + */ +DSLStatement If(DSLExpression test, DSLStatement ifTrue, DSLStatement ifFalse = DSLStatement(), + Position pos = {}); + +DSLExpression InterfaceBlock(const DSLModifiers& modifiers, std::string_view typeName, + SkTArray fields, std::string_view varName = "", + int arraySize = 0, Position pos = {}); + +/** + * return [value]; + */ +DSLStatement Return(DSLExpression value = DSLExpression(), + Position pos = {}); + +/** + * test ? ifTrue : ifFalse + */ +DSLExpression Select(DSLExpression test, DSLExpression ifTrue, DSLExpression ifFalse, + Position = {}); + +// Internal use only +DSLStatement Switch(DSLExpression value, SkTArray cases, Position pos = {}); + +/** + * switch (value) { cases } + */ +template +DSLStatement Switch(DSLExpression value, Cases... cases) { + SkTArray caseArray; + caseArray.reserve_back(sizeof...(cases)); + (caseArray.push_back(std::move(cases)), ...); + return Switch(std::move(value), std::move(caseArray), Position{}); +} + +/** + * while (test) stmt; + */ +DSLStatement While(DSLExpression test, DSLStatement stmt, + Position pos = {}); + +/** + * expression.xyz1 + */ +DSLExpression Swizzle(DSLExpression base, + SkSL::SwizzleComponent::Type a, + Position pos = {}, + Position maskPos = {}); + +DSLExpression Swizzle(DSLExpression base, + SkSL::SwizzleComponent::Type a, + SkSL::SwizzleComponent::Type b, + Position pos = {}, + Position maskPos = {}); + +DSLExpression Swizzle(DSLExpression base, + SkSL::SwizzleComponent::Type a, + SkSL::SwizzleComponent::Type b, + SkSL::SwizzleComponent::Type c, + Position pos = {}, + Position maskPos = {}); + +DSLExpression Swizzle(DSLExpression base, + SkSL::SwizzleComponent::Type a, + SkSL::SwizzleComponent::Type b, + SkSL::SwizzleComponent::Type c, + SkSL::SwizzleComponent::Type d, + Position pos = {}, + Position maskPos = {}); + +/** + * Returns the absolute value of x. If x is a vector, operates componentwise. + */ +DSLExpression Abs(DSLExpression x, Position pos = {}); + +/** + * Returns true if all of the components of boolean vector x are true. + */ +DSLExpression All(DSLExpression x, Position pos = {}); + +/** + * Returns true if any of the components of boolean vector x are true. + */ +DSLExpression Any(DSLExpression x, Position pos = {}); + +/** + * Returns the arctangent of y over x. Operates componentwise on vectors. + */ +DSLExpression Atan(DSLExpression y_over_x, Position pos = {}); +DSLExpression Atan(DSLExpression y, DSLExpression x, Position pos = {}); + +/** + * Returns x rounded towards positive infinity. If x is a vector, operates componentwise. + */ +DSLExpression Ceil(DSLExpression x, Position pos = {}); + +/** + * Returns x clamped to between min and max. If x is a vector, operates componentwise. + */ +DSLExpression Clamp(DSLExpression x, DSLExpression min, DSLExpression max, + Position pos = {}); + +/** + * Returns the cosine of x. If x is a vector, operates componentwise. + */ +DSLExpression Cos(DSLExpression x, Position pos = {}); + +/** + * Returns the cross product of x and y. + */ +DSLExpression Cross(DSLExpression x, DSLExpression y, Position pos = {}); + +/** + * Returns x converted from radians to degrees. If x is a vector, operates componentwise. + */ +DSLExpression Degrees(DSLExpression x, Position pos = {}); + +/** + * Returns the distance between x and y. + */ +DSLExpression Distance(DSLExpression x, DSLExpression y, + Position pos = {}); + +/** + * Returns the dot product of x and y. + */ +DSLExpression Dot(DSLExpression x, DSLExpression y, Position pos = {}); + +/** + * Returns a boolean vector indicating whether components of x are equal to the corresponding + * components of y. + */ +DSLExpression Equal(DSLExpression x, DSLExpression y, Position pos = {}); + +/** + * Returns e^x. If x is a vector, operates componentwise. + */ +DSLExpression Exp(DSLExpression x, Position pos = {}); + +/** + * Returns 2^x. If x is a vector, operates componentwise. + */ +DSLExpression Exp2(DSLExpression x, Position pos = {}); + +/** + * If dot(i, nref) >= 0, returns n, otherwise returns -n. + */ +DSLExpression Faceforward(DSLExpression n, DSLExpression i, DSLExpression nref, + Position pos = {}); + +/** + * Returns x rounded towards negative infinity. If x is a vector, operates componentwise. + */ +DSLExpression Floor(DSLExpression x, Position pos = {}); + +/** + * Returns the fractional part of x. If x is a vector, operates componentwise. + */ +DSLExpression Fract(DSLExpression x, Position pos = {}); + +/** + * Returns a boolean vector indicating whether components of x are greater than the corresponding + * components of y. + */ +DSLExpression GreaterThan(DSLExpression x, DSLExpression y, + Position pos = {}); + +/** + * Returns a boolean vector indicating whether components of x are greater than or equal to the + * corresponding components of y. + */ +DSLExpression GreaterThanEqual(DSLExpression x, DSLExpression y, + Position pos = {}); + +/** + * Returns the 1/sqrt(x). If x is a vector, operates componentwise. + */ +DSLExpression Inversesqrt(DSLExpression x, Position pos = {}); + +/** + * Returns the inverse of the matrix x. + */ +DSLExpression Inverse(DSLExpression x, Position pos = {}); + +/** + * Returns the length of the vector x. + */ +DSLExpression Length(DSLExpression x, Position pos = {}); + +/** + * Returns a boolean vector indicating whether components of x are less than the corresponding + * components of y. + */ +DSLExpression LessThan(DSLExpression x, DSLExpression y, + Position pos = {}); + +/** + * Returns a boolean vector indicating whether components of x are less than or equal to the + * corresponding components of y. + */ +DSLExpression LessThanEqual(DSLExpression x, DSLExpression y, + Position pos = {}); + +/** + * Returns the log base e of x. If x is a vector, operates componentwise. + */ +DSLExpression Log(DSLExpression x, Position pos = {}); + +/** + * Returns the log base 2 of x. If x is a vector, operates componentwise. + */ +DSLExpression Log2(DSLExpression x, Position pos = {}); + +/** + * Returns the larger (closer to positive infinity) of x and y. If x is a vector, operates + * componentwise. y may be either a vector of the same dimensions as x, or a scalar. + */ +DSLExpression Max(DSLExpression x, DSLExpression y, Position pos = {}); + +/** + * Returns the smaller (closer to negative infinity) of x and y. If x is a vector, operates + * componentwise. y may be either a vector of the same dimensions as x, or a scalar. + */ +DSLExpression Min(DSLExpression x, DSLExpression y, Position pos = {}); + +/** + * Returns a linear intepolation between x and y at position a, where a=0 results in x and a=1 + * results in y. If x and y are vectors, operates componentwise. a may be either a vector of the + * same dimensions as x and y, or a scalar. + */ +DSLExpression Mix(DSLExpression x, DSLExpression y, DSLExpression a, + Position pos = {}); + +/** + * Returns x modulo y. If x is a vector, operates componentwise. y may be either a vector of the + * same dimensions as x, or a scalar. + */ +DSLExpression Mod(DSLExpression x, DSLExpression y, Position pos = {}); + +/** + * Returns the vector x normalized to a length of 1. + */ +DSLExpression Normalize(DSLExpression x, Position pos = {}); + +/** + * Returns a boolean vector indicating whether components of x are not equal to the corresponding + * components of y. + */ +DSLExpression NotEqual(DSLExpression x, DSLExpression y, + Position pos = {}); + +/** + * Returns x raised to the power y. If x is a vector, operates componentwise. y may be either a + * vector of the same dimensions as x, or a scalar. + */ +DSLExpression Pow(DSLExpression x, DSLExpression y, Position pos = {}); + +/** + * Returns x converted from degrees to radians. If x is a vector, operates componentwise. + */ +DSLExpression Radians(DSLExpression x, Position pos = {}); + +/** + * Returns i reflected from a surface with normal n. + */ +DSLExpression Reflect(DSLExpression i, DSLExpression n, Position pos = {}); + +/** + * Returns i refracted across a surface with normal n and ratio of indices of refraction eta. + */ +DSLExpression Refract(DSLExpression i, DSLExpression n, DSLExpression eta, + Position pos = {}); + +/** + * Returns x, rounded to the nearest integer. If x is a vector, operates componentwise. + */ +DSLExpression Round(DSLExpression x, Position pos = {}); + +/** + * Returns x clamped to the range [0, 1]. If x is a vector, operates componentwise. + */ +DSLExpression Saturate(DSLExpression x, Position pos = {}); + +/** + * Returns -1, 0, or 1 depending on whether x is negative, zero, or positive, respectively. If x is + * a vector, operates componentwise. + */ +DSLExpression Sign(DSLExpression x, Position pos = {}); + +/** + * Returns the sine of x. If x is a vector, operates componentwise. + */ +DSLExpression Sin(DSLExpression x, Position pos = {}); + +/** + * Returns a smooth interpolation between 0 (at x=edge1) and 1 (at x=edge2). If x is a vector, + * operates componentwise. edge1 and edge2 may either be both vectors of the same dimensions as x or + * scalars. + */ +DSLExpression Smoothstep(DSLExpression edge1, DSLExpression edge2, DSLExpression x, + Position pos = {}); + +/** + * Returns the square root of x. If x is a vector, operates componentwise. + */ +DSLExpression Sqrt(DSLExpression x, Position pos = {}); + +/** + * Returns 0 if x < edge or 1 if x >= edge. If x is a vector, operates componentwise. edge may be + * either a vector of the same dimensions as x, or a scalar. + */ +DSLExpression Step(DSLExpression edge, DSLExpression x, Position pos = {}); + +/** + * Returns the tangent of x. If x is a vector, operates componentwise. + */ +DSLExpression Tan(DSLExpression x, Position pos = {}); + +/** + * Returns x converted from premultipled to unpremultiplied alpha. + */ +DSLExpression Unpremul(DSLExpression x, Position pos = {}); + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLExpression.h b/gfx/skia/skia/include/sksl/DSLExpression.h new file mode 100644 index 0000000000..46e70fa2be --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLExpression.h @@ -0,0 +1,241 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_EXPRESSION +#define SKSL_DSL_EXPRESSION + +#include "include/private/base/SkTArray.h" +#include "include/sksl/SkSLOperator.h" +#include "include/sksl/SkSLPosition.h" + +#include +#include +#include +#include +#include + +#if defined(__has_cpp_attribute) && __has_cpp_attribute(clang::reinitializes) +#define SK_CLANG_REINITIALIZES [[clang::reinitializes]] +#else +#define SK_CLANG_REINITIALIZES +#endif + +namespace SkSL { + +class Expression; +class ExpressionArray; + +namespace dsl { + +class DSLType; +class DSLVarBase; + +/** + * Represents an expression such as 'cos(x)' or 'a + b'. + */ +class DSLExpression { +public: + DSLExpression(const DSLExpression&) = delete; + + DSLExpression(DSLExpression&&); + + DSLExpression(); + + /** + * Creates an expression representing a literal float. + */ + DSLExpression(float value, Position pos = {}); + + /** + * Creates an expression representing a literal float. + */ + DSLExpression(double value, Position pos = {}) + : DSLExpression((float) value) {} + + /** + * Creates an expression representing a literal int. + */ + DSLExpression(int value, Position pos = {}); + + /** + * Creates an expression representing a literal int. + */ + DSLExpression(int64_t value, Position pos = {}); + + /** + * Creates an expression representing a literal uint. + */ + DSLExpression(unsigned int value, Position pos = {}); + + /** + * Creates an expression representing a literal bool. + */ + DSLExpression(bool value, Position pos = {}); + + /** + * Creates an expression representing a variable reference. + */ + DSLExpression(DSLVarBase& var, Position pos = {}); + + DSLExpression(DSLVarBase&& var, Position pos = {}); + + // If expression is null, returns Poison + explicit DSLExpression(std::unique_ptr expression, Position pos = {}); + + static DSLExpression Poison(Position pos = {}); + + ~DSLExpression(); + + DSLType type() const; + + std::string description() const; + + Position position() const; + + void setPosition(Position pos); + + /** + * Performs assignment, like the '=' operator. + */ + DSLExpression assign(DSLExpression other); + + DSLExpression x(Position pos = {}); + + DSLExpression y(Position pos = {}); + + DSLExpression z(Position pos = {}); + + DSLExpression w(Position pos = {}); + + DSLExpression r(Position pos = {}); + + DSLExpression g(Position pos = {}); + + DSLExpression b(Position pos = {}); + + DSLExpression a(Position pos = {}); + + /** + * Creates an SkSL struct field access expression. + */ + DSLExpression field(std::string_view name, Position pos = {}); + + /** + * Creates an SkSL array index expression. + */ + DSLExpression operator[](DSLExpression index); + + DSLExpression operator()(SkTArray args, Position pos = {}); + + DSLExpression operator()(ExpressionArray args, Position pos = {}); + + /** + * Invokes a prefix operator. + */ + DSLExpression prefix(Operator::Kind op, Position pos); + + /** + * Invokes a postfix operator. + */ + DSLExpression postfix(Operator::Kind op, Position pos); + + /** + * Invokes a binary operator. + */ + DSLExpression binary(Operator::Kind op, DSLExpression right, Position pos); + + /** + * Equivalent to operator[]. + */ + DSLExpression index(DSLExpression index, Position pos); + + /** + * Returns true if this object contains an expression. DSLExpressions which were created with + * the empty constructor or which have already been release()ed do not have a value. + * DSLExpressions created with errors are still considered to have a value (but contain poison). + */ + bool hasValue() const { + return fExpression != nullptr; + } + + /** + * Returns true if this object contains an expression which is not poison. + */ + bool isValid() const; + + SK_CLANG_REINITIALIZES void swap(DSLExpression& other); + + /** + * Invalidates this object and returns the SkSL expression it represents. It is an error to call + * this on an invalid DSLExpression. + */ + std::unique_ptr release(); + +private: + /** + * Calls release if this expression has a value, otherwise returns null. + */ + std::unique_ptr releaseIfPossible(); + + std::unique_ptr fExpression; + + friend DSLExpression SampleChild(int index, DSLExpression coords); + + friend class DSLCore; + friend class DSLVarBase; + friend class DSLWriter; +}; + +DSLExpression operator+(DSLExpression left, DSLExpression right); +DSLExpression operator+(DSLExpression expr); +DSLExpression operator+=(DSLExpression left, DSLExpression right); +DSLExpression operator-(DSLExpression left, DSLExpression right); +DSLExpression operator-(DSLExpression expr); +DSLExpression operator-=(DSLExpression left, DSLExpression right); +DSLExpression operator*(DSLExpression left, DSLExpression right); +DSLExpression operator*=(DSLExpression left, DSLExpression right); +DSLExpression operator/(DSLExpression left, DSLExpression right); +DSLExpression operator/=(DSLExpression left, DSLExpression right); +DSLExpression operator%(DSLExpression left, DSLExpression right); +DSLExpression operator%=(DSLExpression left, DSLExpression right); +DSLExpression operator<<(DSLExpression left, DSLExpression right); +DSLExpression operator<<=(DSLExpression left, DSLExpression right); +DSLExpression operator>>(DSLExpression left, DSLExpression right); +DSLExpression operator>>=(DSLExpression left, DSLExpression right); +DSLExpression operator&&(DSLExpression left, DSLExpression right); +DSLExpression operator||(DSLExpression left, DSLExpression right); +DSLExpression operator&(DSLExpression left, DSLExpression right); +DSLExpression operator&=(DSLExpression left, DSLExpression right); +DSLExpression operator|(DSLExpression left, DSLExpression right); +DSLExpression operator|=(DSLExpression left, DSLExpression right); +DSLExpression operator^(DSLExpression left, DSLExpression right); +DSLExpression operator^=(DSLExpression left, DSLExpression right); +DSLExpression LogicalXor(DSLExpression left, DSLExpression right); +DSLExpression operator,(DSLExpression left, DSLExpression right); +DSLExpression operator==(DSLExpression left, DSLExpression right); +DSLExpression operator!=(DSLExpression left, DSLExpression right); +DSLExpression operator>(DSLExpression left, DSLExpression right); +DSLExpression operator<(DSLExpression left, DSLExpression right); +DSLExpression operator>=(DSLExpression left, DSLExpression right); +DSLExpression operator<=(DSLExpression left, DSLExpression right); +DSLExpression operator!(DSLExpression expr); +DSLExpression operator~(DSLExpression expr); +DSLExpression operator++(DSLExpression expr); +DSLExpression operator++(DSLExpression expr, int); +DSLExpression operator--(DSLExpression expr); +DSLExpression operator--(DSLExpression expr, int); + +} // namespace dsl + +} // namespace SkSL + +template struct sk_is_trivially_relocatable; + +template <> +struct sk_is_trivially_relocatable : std::true_type {}; + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLFunction.h b/gfx/skia/skia/include/sksl/DSLFunction.h new file mode 100644 index 0000000000..a4928b02fe --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLFunction.h @@ -0,0 +1,114 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_FUNCTION +#define SKSL_DSL_FUNCTION + +#include "include/core/SkSpan.h" +#include "include/private/SkSLDefines.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/DSLBlock.h" +#include "include/sksl/DSLExpression.h" +#include "include/sksl/DSLModifiers.h" +#include "include/sksl/DSLStatement.h" +#include "include/sksl/DSLVar.h" +#include "include/sksl/SkSLPosition.h" + +#include +#include + +namespace SkSL { + +class FunctionDeclaration; + +namespace dsl { + +class DSLType; + +class DSLFunction { +public: + template + DSLFunction(const DSLType& returnType, std::string_view name, Parameters&... parameters) + : DSLFunction(DSLModifiers(), returnType, name, parameters...) {} + + template + DSLFunction(const DSLModifiers& modifiers, const DSLType& returnType, std::string_view name, + Parameters&... parameters) { + SkTArray parameterArray; + parameterArray.reserve_back(sizeof...(parameters)); + (parameterArray.push_back(¶meters), ...); + + // We can't have a default parameter and a template parameter pack at the same time, so + // unfortunately we can't capture position from this overload. + this->init(modifiers, returnType, name, parameterArray, Position()); + } + + DSLFunction(std::string_view name, const DSLModifiers& modifiers, const DSLType& returnType, + SkSpan parameters, Position pos = {}) { + this->init(modifiers, returnType, name, parameters, pos); + } + + DSLFunction(SkSL::FunctionDeclaration* decl) + : fDecl(decl) {} + + virtual ~DSLFunction() = default; + + template + void define(Stmt... stmts) { + DSLBlock block = DSLBlock(DSLStatement(std::move(stmts))...); + this->define(std::move(block)); + } + + void define(DSLBlock block, Position pos = {}); + + void prototype(); + + /** + * Invokes the function with the given arguments. + */ + template + DSLExpression operator()(Args&&... args) { + ExpressionArray argArray; + argArray.reserve_back(sizeof...(args)); + this->collectArgs(argArray, std::forward(args)...); + return this->call(std::move(argArray)); + } + + /** + * Invokes the function with the given arguments. + */ + DSLExpression call(SkSpan args, Position pos = {}); + + DSLExpression call(ExpressionArray args, Position pos = {}); + +private: + void collectArgs(ExpressionArray& args) {} + + template + void collectArgs(ExpressionArray& args, DSLVar& var, RemainingArgs&&... remaining) { + args.push_back(DSLExpression(var).release()); + collectArgs(args, std::forward(remaining)...); + } + + template + void collectArgs(ExpressionArray& args, DSLExpression expr, RemainingArgs&&... remaining) { + args.push_back(expr.release()); + collectArgs(args, std::forward(remaining)...); + } + + void init(DSLModifiers modifiers, const DSLType& returnType, std::string_view name, + SkSpan params, Position pos); + + SkSL::FunctionDeclaration* fDecl = nullptr; + SkSL::Position fPosition; +}; + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLLayout.h b/gfx/skia/skia/include/sksl/DSLLayout.h new file mode 100644 index 0000000000..6eb8b6257b --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLLayout.h @@ -0,0 +1,118 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_LAYOUT +#define SKSL_DSL_LAYOUT + +#include "include/private/SkSLLayout.h" +#include "include/sksl/SkSLPosition.h" + +namespace SkSL { + +namespace dsl { + +class DSLLayout { +public: + DSLLayout() {} + + DSLLayout& originUpperLeft(Position pos = {}) { + return this->flag(SkSL::Layout::kOriginUpperLeft_Flag, "origin_upper_left", pos); + } + + DSLLayout& pushConstant(Position pos = {}) { + return this->flag(SkSL::Layout::kPushConstant_Flag, "push_constant", pos); + } + + DSLLayout& blendSupportAllEquations(Position pos = {}) { + return this->flag(SkSL::Layout::kBlendSupportAllEquations_Flag, + "blend_support_all_equations", pos); + } + + DSLLayout& color(Position pos = {}) { + return this->flag(SkSL::Layout::kColor_Flag, "color", pos); + } + + DSLLayout& location(int location, Position pos = {}) { + return this->intValue(&fSkSLLayout.fLocation, location, SkSL::Layout::kLocation_Flag, + "location", pos); + } + + DSLLayout& offset(int offset, Position pos = {}) { + return this->intValue(&fSkSLLayout.fOffset, offset, SkSL::Layout::kOffset_Flag, "offset", + pos); + } + + DSLLayout& binding(int binding, Position pos = {}) { + return this->intValue(&fSkSLLayout.fBinding, binding, SkSL::Layout::kBinding_Flag, + "binding", pos); + } + + DSLLayout& texture(int texture, Position pos = {}) { + return this->intValue(&fSkSLLayout.fTexture, texture, SkSL::Layout::kTexture_Flag, + "texture", pos); + } + + DSLLayout& sampler(int sampler, Position pos = {}) { + return this->intValue(&fSkSLLayout.fSampler, sampler, SkSL::Layout::kSampler_Flag, + "sampler", pos); + } + + DSLLayout& index(int index, Position pos = {}) { + return this->intValue(&fSkSLLayout.fIndex, index, SkSL::Layout::kIndex_Flag, "index", pos); + } + + DSLLayout& set(int set, Position pos = {}) { + return this->intValue(&fSkSLLayout.fSet, set, SkSL::Layout::kSet_Flag, "set", pos); + } + + DSLLayout& builtin(int builtin, Position pos = {}) { + return this->intValue(&fSkSLLayout.fBuiltin, builtin, SkSL::Layout::kBuiltin_Flag, + "builtin", pos); + } + + DSLLayout& inputAttachmentIndex(int inputAttachmentIndex, + Position pos = {}) { + return this->intValue(&fSkSLLayout.fInputAttachmentIndex, inputAttachmentIndex, + SkSL::Layout::kInputAttachmentIndex_Flag, "input_attachment_index", + pos); + } + + DSLLayout& spirv(Position pos = {}) { + return this->flag(SkSL::Layout::kSPIRV_Flag, "spirv", pos); + } + + DSLLayout& metal(Position pos = {}) { + return this->flag(SkSL::Layout::kMetal_Flag, "metal", pos); + } + + DSLLayout& gl(Position pos = {}) { + return this->flag(SkSL::Layout::kGL_Flag, "gl", pos); + } + + DSLLayout& wgsl(Position pos = {}) { + return this->flag(SkSL::Layout::kWGSL_Flag, "wgsl", pos); + } + +private: + explicit DSLLayout(SkSL::Layout skslLayout) + : fSkSLLayout(skslLayout) {} + + DSLLayout& flag(SkSL::Layout::Flag mask, const char* name, Position pos); + + DSLLayout& intValue(int* target, int value, SkSL::Layout::Flag flag, const char* name, + Position pos); + + SkSL::Layout fSkSLLayout; + + friend class DSLModifiers; +}; + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLModifiers.h b/gfx/skia/skia/include/sksl/DSLModifiers.h new file mode 100644 index 0000000000..c60b7b2c0c --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLModifiers.h @@ -0,0 +1,72 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_MODIFIERS +#define SKSL_DSL_MODIFIERS + +#include "include/core/SkSpan.h" +#include "include/private/SkSLModifiers.h" +#include "include/sksl/DSLLayout.h" + +namespace SkSL { + +namespace dsl { + +class DSLField; +class DSLType; + +enum Modifier { + kNo_Modifier = SkSL::Modifiers::kNo_Flag, + kConst_Modifier = SkSL::Modifiers::kConst_Flag, + kIn_Modifier = SkSL::Modifiers::kIn_Flag, + kOut_Modifier = SkSL::Modifiers::kOut_Flag, + kInOut_Modifier = SkSL::Modifiers::kIn_Flag | SkSL::Modifiers::kOut_Flag, + kUniform_Modifier = SkSL::Modifiers::kUniform_Flag, + kFlat_Modifier = SkSL::Modifiers::kFlat_Flag, + kNoPerspective_Modifier = SkSL::Modifiers::kNoPerspective_Flag, +}; + +class DSLModifiers { +public: + DSLModifiers(int flags = 0, Position pos = {}) + : DSLModifiers(DSLLayout(), flags, pos) {} + + DSLModifiers(DSLLayout layout, int flags = 0, Position pos = {}) + : fModifiers(layout.fSkSLLayout, flags) + , fPosition(pos) {} + + int& flags() { + return fModifiers.fFlags; + } + + const int& flags() const { + return fModifiers.fFlags; + } + + DSLLayout layout() const { + return DSLLayout(fModifiers.fLayout); + } + +private: + SkSL::Modifiers fModifiers; + Position fPosition; + + friend DSLType StructType(std::string_view name, + SkSpan fields, + bool interfaceBlock, + Position pos); + friend class DSLCore; + friend class DSLFunction; + friend class DSLType; + friend class DSLWriter; +}; + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLStatement.h b/gfx/skia/skia/include/sksl/DSLStatement.h new file mode 100644 index 0000000000..391e911d3a --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLStatement.h @@ -0,0 +1,82 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_STATEMENT +#define SKSL_DSL_STATEMENT + +#include "include/core/SkTypes.h" +#include "include/private/SkSLStatement.h" +#include "include/sksl/SkSLPosition.h" + +#include +#include + +namespace SkSL { + +class Expression; + +namespace dsl { + +class DSLBlock; +class DSLExpression; + +class DSLStatement { +public: + DSLStatement(); + + DSLStatement(DSLExpression expr); + + DSLStatement(DSLBlock block); + + DSLStatement(DSLStatement&&) = default; + + DSLStatement(std::unique_ptr expr); + + DSLStatement(std::unique_ptr stmt, Position pos); + + DSLStatement(std::unique_ptr stmt); + + ~DSLStatement(); + + DSLStatement& operator=(DSLStatement&& other) = default; + + Position position() { + SkASSERT(this->hasValue()); + return fStatement->fPosition; + } + + void setPosition(Position pos) { + SkASSERT(this->hasValue()); + fStatement->fPosition = pos; + } + + bool hasValue() { return fStatement != nullptr; } + + std::unique_ptr release() { + SkASSERT(this->hasValue()); + return std::move(fStatement); + } + +private: + std::unique_ptr releaseIfPossible() { + return std::move(fStatement); + } + + std::unique_ptr fStatement; + + friend class DSLCore; + friend class DSLWriter; + friend DSLStatement operator,(DSLStatement left, DSLStatement right); +}; + +DSLStatement operator,(DSLStatement left, DSLStatement right); + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLType.h b/gfx/skia/skia/include/sksl/DSLType.h new file mode 100644 index 0000000000..fe2522e1aa --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLType.h @@ -0,0 +1,297 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_TYPE +#define SKSL_DSL_TYPE + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/sksl/DSLExpression.h" +#include "include/sksl/DSLModifiers.h" +#include "include/sksl/SkSLPosition.h" + +#include +#include +#include + +namespace SkSL { + +class Compiler; +class Type; + +namespace dsl { + +class DSLField; +class DSLVarBase; + +enum TypeConstant : uint8_t { + kBool_Type, + kBool2_Type, + kBool3_Type, + kBool4_Type, + kHalf_Type, + kHalf2_Type, + kHalf3_Type, + kHalf4_Type, + kHalf2x2_Type, + kHalf3x2_Type, + kHalf4x2_Type, + kHalf2x3_Type, + kHalf3x3_Type, + kHalf4x3_Type, + kHalf2x4_Type, + kHalf3x4_Type, + kHalf4x4_Type, + kFloat_Type, + kFloat2_Type, + kFloat3_Type, + kFloat4_Type, + kFragmentProcessor_Type, + kFloat2x2_Type, + kFloat3x2_Type, + kFloat4x2_Type, + kFloat2x3_Type, + kFloat3x3_Type, + kFloat4x3_Type, + kFloat2x4_Type, + kFloat3x4_Type, + kFloat4x4_Type, + kInt_Type, + kInt2_Type, + kInt3_Type, + kInt4_Type, + kShader_Type, + kShort_Type, + kShort2_Type, + kShort3_Type, + kShort4_Type, + kUInt_Type, + kUInt2_Type, + kUInt3_Type, + kUInt4_Type, + kUShort_Type, + kUShort2_Type, + kUShort3_Type, + kUShort4_Type, + kVoid_Type, + kPoison_Type, +}; + +class DSLType { +public: + DSLType(TypeConstant tc, Position pos = {}); + + DSLType(const SkSL::Type* type, Position pos = {}); + + DSLType(std::string_view name, Position pos = {}); + + DSLType(std::string_view name, + DSLModifiers* modifiers, + Position pos = {}); + + static DSLType Invalid(); + + /** + * Returns true if the SkSL type is non-null. + */ + bool hasValue() const { return fSkSLType != nullptr; } + + /** + * Returns true if this type is a bool. + */ + bool isBoolean() const; + + /** + * Returns true if this is a numeric scalar type. + */ + bool isNumber() const; + + /** + * Returns true if this is a floating-point scalar type (float or half). + */ + bool isFloat() const; + + /** + * Returns true if this is a signed scalar type (int or short). + */ + bool isSigned() const; + + /** + * Returns true if this is an unsigned scalar type (uint or ushort). + */ + bool isUnsigned() const; + + /** + * Returns true if this is a signed or unsigned integer. + */ + bool isInteger() const; + + /** + * Returns true if this is a scalar type. + */ + bool isScalar() const; + + /** + * Returns true if this is a vector type. + */ + bool isVector() const; + + /** + * Returns true if this is a matrix type. + */ + bool isMatrix() const; + + /** + * Returns true if this is a array type. + */ + bool isArray() const; + + /** + * Returns true if this is a struct type. + */ + bool isStruct() const; + + /** + * Returns true if this is an interface block + */ + bool isInterfaceBlock() const; + + /** + * Returns true if this is a Skia object type (shader, colorFilter, blender). + */ + bool isEffectChild() const; + + template + static DSLExpression Construct(DSLType type, DSLVarBase& var, Args&&... args) { + DSLExpression argArray[] = {var, args...}; + return Construct(type, SkSpan(argArray)); + } + + template + static DSLExpression Construct(DSLType type, DSLExpression expr, Args&&... args) { + DSLExpression argArray[] = {std::move(expr), std::move(args)...}; + return Construct(type, SkSpan(argArray)); + } + + static DSLExpression Construct(DSLType type, SkSpan argArray); + +private: + const SkSL::Type& skslType() const { + SkASSERT(fSkSLType); + return *fSkSLType; + } + + const SkSL::Type* fSkSLType = nullptr; + + friend DSLType Array(const DSLType& base, int count, Position pos); + friend DSLType Struct(std::string_view name, SkSpan fields, Position pos); + friend DSLType StructType(std::string_view name, + SkSpan fields, + bool interfaceBlock, + Position pos); + friend DSLType UnsizedArray(const DSLType& base, Position pos); + friend class DSLCore; + friend class DSLFunction; + friend class DSLVarBase; + friend class DSLWriter; + friend class SkSL::Compiler; +}; + +#define TYPE(T) \ + template \ + DSLExpression T(Args&&... args) { \ + return DSLType::Construct(k ## T ## _Type, std::forward(args)...); \ + } + +#define VECTOR_TYPE(T) \ + TYPE(T) \ + TYPE(T ## 2) \ + TYPE(T ## 3) \ + TYPE(T ## 4) + +#define MATRIX_TYPE(T) \ + TYPE(T ## 2x2) \ + TYPE(T ## 3x2) \ + TYPE(T ## 4x2) \ + TYPE(T ## 2x3) \ + TYPE(T ## 3x3) \ + TYPE(T ## 4x3) \ + TYPE(T ## 2x4) \ + TYPE(T ## 3x4) \ + TYPE(T ## 4x4) + +VECTOR_TYPE(Bool) +VECTOR_TYPE(Float) +VECTOR_TYPE(Half) +VECTOR_TYPE(Int) +VECTOR_TYPE(UInt) +VECTOR_TYPE(Short) +VECTOR_TYPE(UShort) + +MATRIX_TYPE(Float) +MATRIX_TYPE(Half) + +#undef TYPE +#undef VECTOR_TYPE +#undef MATRIX_TYPE + +DSLType Array(const DSLType& base, int count, Position pos = {}); + +DSLType UnsizedArray(const DSLType& base, Position pos = {}); + +class DSLField { +public: + DSLField(const DSLType type, std::string_view name, + Position pos = {}) + : DSLField(DSLModifiers(), type, name, pos) {} + + DSLField(const DSLModifiers& modifiers, const DSLType type, std::string_view name, + Position pos = {}) + : fModifiers(modifiers) + , fType(type) + , fName(name) + , fPosition(pos) {} + +private: + DSLModifiers fModifiers; + const DSLType fType; + std::string_view fName; + Position fPosition; + + friend class DSLCore; + friend DSLType StructType(std::string_view name, + SkSpan fields, + bool interfaceBlock, + Position pos); +}; + +/** + * Creates a StructDefinition at the top level and returns the associated type. + */ +DSLType Struct(std::string_view name, SkSpan fields, Position pos = {}); + +template +DSLType Struct(std::string_view name, Field... fields) { + DSLField fieldTypes[] = {std::move(fields)...}; + return Struct(name, SkSpan(fieldTypes), Position()); +} + +/** + * Creates a struct type and adds it to the current symbol table. Does _not_ create a ProgramElement + * at the top level, so the type will exist, but won't be represented anywhere in the output. + * (Use Struct or InterfaceBlock to add a top-level program element.) + */ +DSLType StructType(std::string_view name, + SkSpan fields, + bool interfaceBlock, + Position pos); + +} // namespace dsl + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/DSLVar.h b/gfx/skia/skia/include/sksl/DSLVar.h new file mode 100644 index 0000000000..f052a525e3 --- /dev/null +++ b/gfx/skia/skia/include/sksl/DSLVar.h @@ -0,0 +1,231 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DSL_VAR +#define SKSL_DSL_VAR + +#include "include/private/SkSLStatement.h" +#include "include/sksl/DSLExpression.h" +#include "include/sksl/DSLModifiers.h" +#include "include/sksl/DSLType.h" +#include "include/sksl/SkSLPosition.h" + +#include +#include +#include +#include + +namespace SkSL { + +class Expression; +class ExpressionArray; +class Variable; +enum class VariableStorage : int8_t; + +namespace dsl { + +class DSLVarBase { +public: + /** + * Constructs a new variable with the specified type and name. + */ + DSLVarBase(VariableStorage storage, DSLType type, std::string_view name, + DSLExpression initialValue, Position pos, Position namePos); + + DSLVarBase(VariableStorage storage, const DSLModifiers& modifiers, DSLType type, + std::string_view name, DSLExpression initialValue, Position pos, Position namePos); + + DSLVarBase(DSLVarBase&&) = default; + + std::string_view name() const { + return fName; + } + + const DSLModifiers& modifiers() const { + return fModifiers; + } + + VariableStorage storage() const { + return fStorage; + } + + DSLExpression x() { + return DSLExpression(*this).x(); + } + + DSLExpression y() { + return DSLExpression(*this).y(); + } + + DSLExpression z() { + return DSLExpression(*this).z(); + } + + DSLExpression w() { + return DSLExpression(*this).w(); + } + + DSLExpression r() { + return DSLExpression(*this).r(); + } + + DSLExpression g() { + return DSLExpression(*this).g(); + } + + DSLExpression b() { + return DSLExpression(*this).b(); + } + + DSLExpression a() { + return DSLExpression(*this).a(); + } + + DSLExpression field(std::string_view name) { + return DSLExpression(*this).field(name); + } + + DSLExpression operator[](DSLExpression&& index); + + DSLExpression operator++() { + return ++DSLExpression(*this); + } + + DSLExpression operator++(int) { + return DSLExpression(*this)++; + } + + DSLExpression operator--() { + return --DSLExpression(*this); + } + + DSLExpression operator--(int) { + return DSLExpression(*this)--; + } + + template DSLExpression assign(T&& param) { + return this->assignExpression(DSLExpression(std::forward(param))); + } + +protected: + /** + * Creates an empty, unpopulated var. Can be replaced with a real var later via `swap`. + */ + DSLVarBase(VariableStorage storage) : fType(kVoid_Type), fStorage(storage) {} + + DSLExpression assignExpression(DSLExpression other); + + void swap(DSLVarBase& other); + + DSLModifiers fModifiers; + // We only need to keep track of the type here so that we can create the SkSL::Variable. For + // predefined variables this field is unnecessary, so we don't bother tracking it and just set + // it to kVoid; in other words, you shouldn't generally be relying on this field to be correct. + // If you need to determine the variable's type, look at DSLWriter::Var(...)->type() instead. + DSLType fType; + std::unique_ptr fDeclaration; + SkSL::Variable* fVar = nullptr; + Position fNamePosition; + std::string_view fName; + DSLExpression fInitialValue; + Position fPosition; + VariableStorage fStorage; + bool fInitialized = false; + + friend class DSLCore; + friend class DSLFunction; + friend class DSLWriter; +}; + +/** + * A local variable. + */ +class DSLVar : public DSLVarBase { +public: + DSLVar(); + + DSLVar(DSLType type, std::string_view name, DSLExpression initialValue = DSLExpression(), + Position pos = {}, Position namePos = {}); + + DSLVar(const DSLModifiers& modifiers, DSLType type, std::string_view name, + DSLExpression initialValue = DSLExpression(), Position pos = {}, Position namePos = {}); + + DSLVar(DSLVar&&) = default; + + void swap(DSLVar& other); + +private: + using INHERITED = DSLVarBase; +}; + +/** + * A global variable. + */ +class DSLGlobalVar : public DSLVarBase { +public: + DSLGlobalVar(); + + DSLGlobalVar(DSLType type, std::string_view name, DSLExpression initialValue = DSLExpression(), + Position pos = {}, Position namePos = {}); + + DSLGlobalVar(const DSLModifiers& modifiers, DSLType type, std::string_view name, + DSLExpression initialValue = DSLExpression(), + Position pos = {}, Position namePos = {}); + + DSLGlobalVar(const char* name); + + DSLGlobalVar(DSLGlobalVar&&) = default; + + void swap(DSLGlobalVar& other); + + /** + * Implements the following method calls: + * half4 shader::eval(float2 coords); + * half4 colorFilter::eval(half4 input); + */ + DSLExpression eval(DSLExpression x, Position pos = {}); + + /** + * Implements the following method call: + * half4 blender::eval(half4 src, half4 dst); + */ + DSLExpression eval(DSLExpression x, DSLExpression y, Position pos = {}); + +private: + DSLExpression eval(ExpressionArray args, Position pos); + + std::unique_ptr methodCall(std::string_view methodName, Position pos); + + using INHERITED = DSLVarBase; +}; + +/** + * A function parameter. + */ +class DSLParameter : public DSLVarBase { +public: + DSLParameter(); + + DSLParameter(DSLType type, std::string_view name, Position pos = {}, Position namePos = {}); + + DSLParameter(const DSLModifiers& modifiers, DSLType type, std::string_view name, + Position pos = {}, Position namePos = {}); + + DSLParameter(DSLParameter&&) = default; + + void swap(DSLParameter& other); + +private: + using INHERITED = DSLVarBase; +}; + +} // namespace dsl + +} // namespace SkSL + + +#endif diff --git a/gfx/skia/skia/include/sksl/SkSLDebugTrace.h b/gfx/skia/skia/include/sksl/SkSLDebugTrace.h new file mode 100644 index 0000000000..9c5eafbc94 --- /dev/null +++ b/gfx/skia/skia/include/sksl/SkSLDebugTrace.h @@ -0,0 +1,28 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_DEBUG_TRACE +#define SKSL_DEBUG_TRACE + +#include "include/core/SkRefCnt.h" + +class SkWStream; + +namespace SkSL { + +class DebugTrace : public SkRefCnt { +public: + /** Serializes a debug trace to JSON which can be parsed by our debugger. */ + virtual void writeTrace(SkWStream* w) const = 0; + + /** Generates a human-readable dump of the debug trace. */ + virtual void dump(SkWStream* o) const = 0; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/SkSLErrorReporter.h b/gfx/skia/skia/include/sksl/SkSLErrorReporter.h new file mode 100644 index 0000000000..4abf4631b8 --- /dev/null +++ b/gfx/skia/skia/include/sksl/SkSLErrorReporter.h @@ -0,0 +1,65 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_ERROR_REPORTER +#define SKSL_ERROR_REPORTER + +#include "include/core/SkTypes.h" + +#include + +namespace SkSL { + +class Position; + +/** + * Class which is notified in the event of an error. + */ +class ErrorReporter { +public: + ErrorReporter() {} + + virtual ~ErrorReporter() {} + + void error(Position position, std::string_view msg); + + std::string_view source() const { return fSource; } + + void setSource(std::string_view source) { fSource = source; } + + int errorCount() const { + return fErrorCount; + } + + void resetErrorCount() { + fErrorCount = 0; + } + +protected: + /** + * Called when an error is reported. + */ + virtual void handleError(std::string_view msg, Position position) = 0; + +private: + Position position(int offset) const; + + std::string_view fSource; + int fErrorCount = 0; +}; + +/** + * Error reporter for tests that need an SkSL context; aborts immediately if an error is reported. + */ +class TestingOnly_AbortErrorReporter : public ErrorReporter { +public: + void handleError(std::string_view msg, Position pos) override; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/SkSLOperator.h b/gfx/skia/skia/include/sksl/SkSLOperator.h new file mode 100644 index 0000000000..1e47dce618 --- /dev/null +++ b/gfx/skia/skia/include/sksl/SkSLOperator.h @@ -0,0 +1,154 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_OPERATOR +#define SKSL_OPERATOR + +#include +#include + +namespace SkSL { + +class Context; +class Type; + +enum class OperatorKind : uint8_t { + PLUS, + MINUS, + STAR, + SLASH, + PERCENT, + SHL, + SHR, + LOGICALNOT, + LOGICALAND, + LOGICALOR, + LOGICALXOR, + BITWISENOT, + BITWISEAND, + BITWISEOR, + BITWISEXOR, + EQ, + EQEQ, + NEQ, + LT, + GT, + LTEQ, + GTEQ, + PLUSEQ, + MINUSEQ, + STAREQ, + SLASHEQ, + PERCENTEQ, + SHLEQ, + SHREQ, + BITWISEANDEQ, + BITWISEOREQ, + BITWISEXOREQ, + PLUSPLUS, + MINUSMINUS, + COMMA +}; + +enum class OperatorPrecedence : uint8_t { + kParentheses = 1, + kPostfix = 2, + kPrefix = 3, + kMultiplicative = 4, + kAdditive = 5, + kShift = 6, + kRelational = 7, + kEquality = 8, + kBitwiseAnd = 9, + kBitwiseXor = 10, + kBitwiseOr = 11, + kLogicalAnd = 12, + kLogicalXor = 13, + kLogicalOr = 14, + kTernary = 15, + kAssignment = 16, + kSequence = 17, + kTopLevel = kSequence +}; + +class Operator { +public: + using Kind = OperatorKind; + + Operator(Kind op) : fKind(op) {} + + Kind kind() const { return fKind; } + + bool isEquality() const { + return fKind == Kind::EQEQ || fKind == Kind::NEQ; + } + + OperatorPrecedence getBinaryPrecedence() const; + + // Returns the operator name surrounded by the expected whitespace for a tidy binary expression. + const char* operatorName() const; + + // Returns the operator name without any surrounding whitespace. + std::string_view tightOperatorName() const; + + // Returns true if op is '=' or any compound assignment operator ('+=', '-=', etc.) + bool isAssignment() const; + + // Given a compound assignment operator, returns the non-assignment version of the operator + // (e.g. '+=' becomes '+') + Operator removeAssignment() const; + + /** + * Defines the set of relational (comparison) operators: + * < <= > >= + */ + bool isRelational() const; + + /** + * Defines the set of operators which are only valid on integral types: + * << <<= >> >>= & &= | |= ^ ^= % %= + */ + bool isOnlyValidForIntegralTypes() const; + + /** + * Defines the set of operators which perform vector/matrix math. + * + += - -= * *= / /= % %= << <<= >> >>= & &= | |= ^ ^= + */ + bool isValidForMatrixOrVector() const; + + /* + * Defines the set of operators allowed by The OpenGL ES Shading Language 1.00, Section 5.1. + * The set of illegal (reserved) operators are the ones that only make sense with integral + * types. This is not a coincidence: It's because ES2 doesn't require 'int' to be anything but + * syntactic sugar for floats with truncation after each operation. + */ + bool isAllowedInStrictES2Mode() const { + return !this->isOnlyValidForIntegralTypes(); + } + + /** + * Determines the operand and result types of a binary expression. Returns true if the + * expression is legal, false otherwise. If false, the values of the out parameters are + * undefined. + */ + bool determineBinaryType(const Context& context, + const Type& left, + const Type& right, + const Type** outLeftType, + const Type** outRightType, + const Type** outResultType) const; + +private: + bool isOperator() const; + bool isMatrixMultiply(const Type& left, const Type& right) const; + + Kind fKind; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/SkSLPosition.h b/gfx/skia/skia/include/sksl/SkSLPosition.h new file mode 100644 index 0000000000..5f8e80a607 --- /dev/null +++ b/gfx/skia/skia/include/sksl/SkSLPosition.h @@ -0,0 +1,104 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_POSITION +#define SKSL_POSITION + +#include "include/core/SkTypes.h" + +#include +#include + +namespace SkSL { + +class Position { +public: + Position() + : fStartOffset(-1) + , fLength(0) {} + + static Position Range(int startOffset, int endOffset) { + SkASSERT(startOffset <= endOffset); + SkASSERT(startOffset <= 0xFFFFFF); + int length = endOffset - startOffset; + Position result; + result.fStartOffset = startOffset; + result.fLength = length <= 0xFF ? length : 0xFF; + return result; + } + + bool valid() const { + return fStartOffset != -1; + } + + int line(std::string_view source) const; + + int startOffset() const { + SkASSERT(this->valid()); + return fStartOffset; + } + + int endOffset() const { + SkASSERT(this->valid()); + return fStartOffset + fLength; + } + + // Returns the position from this through, and including the entirety of, end. + Position rangeThrough(Position end) const { + if (fStartOffset == -1 || end.fStartOffset == -1) { + return *this; + } + SkASSERTF(this->startOffset() <= end.startOffset() && this->endOffset() <= end.endOffset(), + "Invalid range: (%d-%d) - (%d-%d)\n", this->startOffset(), this->endOffset(), + end.startOffset(), end.endOffset()); + return Range(this->startOffset(), end.endOffset()); + } + + // Returns a position representing the character immediately after this position + Position after() const { + int endOffset = this->endOffset(); + return Range(endOffset, endOffset + 1); + } + + bool operator==(const Position& other) const { + return fStartOffset == other.fStartOffset && fLength == other.fLength; + } + + bool operator!=(const Position& other) const { + return !(*this == other); + } + + bool operator>(const Position& other) const { + return fStartOffset > other.fStartOffset; + } + + bool operator>=(const Position& other) const { + return fStartOffset >= other.fStartOffset; + } + + bool operator<(const Position& other) const { + return fStartOffset < other.fStartOffset; + } + + bool operator<=(const Position& other) const { + return fStartOffset <= other.fStartOffset; + } + +private: + int32_t fStartOffset : 24; + uint32_t fLength : 8; +}; + +struct ForLoopPositions { + Position initPosition = Position(); + Position conditionPosition = Position(); + Position nextPosition = Position(); +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/sksl/SkSLVersion.h b/gfx/skia/skia/include/sksl/SkSLVersion.h new file mode 100644 index 0000000000..ad059d580e --- /dev/null +++ b/gfx/skia/skia/include/sksl/SkSLVersion.h @@ -0,0 +1,27 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLVersion_DEFINED +#define SkSLVersion_DEFINED + +namespace SkSL { + +enum class Version { + /** + * Desktop GLSL 1.10, GLSL ES 1.00, WebGL 1.0 + */ + k100, + + /** + * Desktop GLSL 3.30, GLSL ES 3.00, WebGL 2.0 + */ + k300, +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/include/utils/SkAnimCodecPlayer.h b/gfx/skia/skia/include/utils/SkAnimCodecPlayer.h new file mode 100644 index 0000000000..f4729aa37d --- /dev/null +++ b/gfx/skia/skia/include/utils/SkAnimCodecPlayer.h @@ -0,0 +1,67 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAnimCodecPlayer_DEFINED +#define SkAnimCodecPlayer_DEFINED + +#include "include/codec/SkCodec.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" + +#include +#include +#include + +class SkImage; + +class SkAnimCodecPlayer { +public: + SkAnimCodecPlayer(std::unique_ptr codec); + ~SkAnimCodecPlayer(); + + /** + * Returns the current frame of the animation. This defaults to the first frame for + * animated codecs (i.e. msec = 0). Calling this multiple times (without calling seek()) + * will always return the same image object (or null if there was an error). + */ + sk_sp getFrame(); + + /** + * Return the size of the image(s) that will be returned by getFrame(). + */ + SkISize dimensions() const; + + /** + * Returns the total duration of the animation in milliseconds. Returns 0 for a single-frame + * image. + */ + uint32_t duration() const { return fTotalDuration; } + + /** + * Finds the closest frame associated with the time code (in milliseconds) and sets that + * to be the current frame (call getFrame() to retrieve that image). + * Returns true iff this call to seek() changed the "current frame" for the animation. + * Thus if seek() returns false, then getFrame() will return the same image as it did + * before this call to seek(). + */ + bool seek(uint32_t msec); + + +private: + std::unique_ptr fCodec; + SkImageInfo fImageInfo; + std::vector fFrameInfos; + std::vector > fImages; + int fCurrIndex = 0; + uint32_t fTotalDuration; + + sk_sp getFrameAt(int index); +}; + +#endif + diff --git a/gfx/skia/skia/include/utils/SkBase64.h b/gfx/skia/skia/include/utils/SkBase64.h new file mode 100644 index 0000000000..e01028543a --- /dev/null +++ b/gfx/skia/skia/include/utils/SkBase64.h @@ -0,0 +1,53 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBase64_DEFINED +#define SkBase64_DEFINED + +#include "include/core/SkTypes.h" + +#include + +struct SkBase64 { +public: + enum Error { + kNoError, + kPadError, + kBadCharError + }; + + /** + Base64 encodes src into dst. + + Normally this is called once with 'dst' nullptr to get the required size, then again with an + allocated 'dst' pointer to do the actual encoding. + + @param dst nullptr or a pointer to a buffer large enough to receive the result + + @param encode nullptr for default encoding or a pointer to at least 65 chars. + encode[64] will be used as the pad character. + Encodings other than the default encoding cannot be decoded. + + @return the required length of dst for encoding. + */ + static size_t Encode(const void* src, size_t length, void* dst, const char* encode = nullptr); + + /** + Base64 decodes src into dst. + + Normally this is called once with 'dst' nullptr to get the required size, then again with an + allocated 'dst' pointer to do the actual encoding. + + @param dst nullptr or a pointer to a buffer large enough to receive the result + + @param dstLength assigned the length dst is required to be. Must not be nullptr. + */ + static Error SK_WARN_UNUSED_RESULT Decode(const void* src, size_t srcLength, + void* dst, size_t* dstLength); +}; + +#endif // SkBase64_DEFINED diff --git a/gfx/skia/skia/include/utils/SkCamera.h b/gfx/skia/skia/include/utils/SkCamera.h new file mode 100644 index 0000000000..536691875e --- /dev/null +++ b/gfx/skia/skia/include/utils/SkCamera.h @@ -0,0 +1,109 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// Inspired by Rob Johnson's most excellent QuickDraw GX sample code + +#ifndef SkCamera_DEFINED +#define SkCamera_DEFINED + +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkNoncopyable.h" + +// NOTE -- This entire header / impl is deprecated, and will be removed from Skia soon. +// +// Skia now has support for a 4x matrix (SkM44) in SkCanvas. +// + +class SkCanvas; + +// DEPRECATED +class SkPatch3D { +public: + SkPatch3D(); + + void reset(); + void transform(const SkM44&, SkPatch3D* dst = nullptr) const; + + // dot a unit vector with the patch's normal + SkScalar dotWith(SkScalar dx, SkScalar dy, SkScalar dz) const; + SkScalar dotWith(const SkV3& v) const { + return this->dotWith(v.x, v.y, v.z); + } + + // deprecated, but still here for animator (for now) + void rotate(SkScalar /*x*/, SkScalar /*y*/, SkScalar /*z*/) {} + void rotateDegrees(SkScalar /*x*/, SkScalar /*y*/, SkScalar /*z*/) {} + +private: +public: // make public for SkDraw3D for now + SkV3 fU, fV; + SkV3 fOrigin; + + friend class SkCamera3D; +}; + +// DEPRECATED +class SkCamera3D { +public: + SkCamera3D(); + + void reset(); + void update(); + void patchToMatrix(const SkPatch3D&, SkMatrix* matrix) const; + + SkV3 fLocation; // origin of the camera's space + SkV3 fAxis; // view direction + SkV3 fZenith; // up direction + SkV3 fObserver; // eye position (may not be the same as the origin) + +private: + mutable SkMatrix fOrientation; + mutable bool fNeedToUpdate; + + void doUpdate() const; +}; + +// DEPRECATED +class SK_API Sk3DView : SkNoncopyable { +public: + Sk3DView(); + ~Sk3DView(); + + void save(); + void restore(); + + void translate(SkScalar x, SkScalar y, SkScalar z); + void rotateX(SkScalar deg); + void rotateY(SkScalar deg); + void rotateZ(SkScalar deg); + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + void setCameraLocation(SkScalar x, SkScalar y, SkScalar z); + SkScalar getCameraLocationX() const; + SkScalar getCameraLocationY() const; + SkScalar getCameraLocationZ() const; +#endif + + void getMatrix(SkMatrix*) const; + void applyToCanvas(SkCanvas*) const; + + SkScalar dotWithNormal(SkScalar dx, SkScalar dy, SkScalar dz) const; + +private: + struct Rec { + Rec* fNext; + SkM44 fMatrix; + }; + Rec* fRec; + Rec fInitialRec; + SkCamera3D fCamera; +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkCanvasStateUtils.h b/gfx/skia/skia/include/utils/SkCanvasStateUtils.h new file mode 100644 index 0000000000..0172e37931 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkCanvasStateUtils.h @@ -0,0 +1,81 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCanvasStateUtils_DEFINED +#define SkCanvasStateUtils_DEFINED + +#include "include/core/SkTypes.h" + +#include + +class SkCanvas; +class SkCanvasState; + +/** + * A set of functions that are useful for copying the state of an SkCanvas + * across a library boundary where the Skia library on the other side of the + * boundary may be newer. The expected usage is outline below... + * + * Lib Boundary + * CaptureCanvasState(...) ||| + * SkCanvas --> SkCanvasState ||| + * ||| CreateFromCanvasState(...) + * ||| SkCanvasState --> SkCanvas` + * ||| Draw into SkCanvas` + * ||| Unref SkCanvas` + * ReleaseCanvasState(...) ||| + * + */ +class SK_API SkCanvasStateUtils { +public: + /** + * Captures the current state of the canvas into an opaque ptr that is safe + * to pass to a different instance of Skia (which may be the same version, + * or may be newer). The function will return NULL in the event that one of the + * following conditions are true. + * 1) the canvas device type is not supported (currently only raster is supported) + * 2) the canvas clip type is not supported (currently only non-AA clips are supported) + * + * It is recommended that the original canvas also not be used until all + * canvases that have been created using its captured state have been dereferenced. + * + * Finally, it is important to note that any draw filters attached to the + * canvas are NOT currently captured. + * + * @param canvas The canvas you wish to capture the current state of. + * @return NULL or an opaque ptr that can be passed to CreateFromCanvasState + * to reconstruct the canvas. The caller is responsible for calling + * ReleaseCanvasState to free the memory associated with this state. + */ + static SkCanvasState* CaptureCanvasState(SkCanvas* canvas); + + /** + * Create a new SkCanvas from the captured state of another SkCanvas. The + * function will return NULL in the event that one of the + * following conditions are true. + * 1) the captured state is in an unrecognized format + * 2) the captured canvas device type is not supported + * + * @param state Opaque object created by CaptureCanvasState. + * @return NULL or an SkCanvas* whose devices and matrix/clip state are + * identical to the captured canvas. The caller is responsible for + * calling unref on the SkCanvas. + */ + static std::unique_ptr MakeFromCanvasState(const SkCanvasState* state); + + /** + * Free the memory associated with the captured canvas state. The state + * should not be released until all SkCanvas objects created using that + * state have been dereferenced. Must be called from the same library + * instance that created the state via CaptureCanvasState. + * + * @param state The captured state you wish to dispose of. + */ + static void ReleaseCanvasState(SkCanvasState* state); +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkCustomTypeface.h b/gfx/skia/skia/include/utils/SkCustomTypeface.h new file mode 100644 index 0000000000..d387fb24ca --- /dev/null +++ b/gfx/skia/skia/include/utils/SkCustomTypeface.h @@ -0,0 +1,69 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCustomTypeface_DEFINED +#define SkCustomTypeface_DEFINED + +#include "include/core/SkDrawable.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkPath.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" + +#include +#include + +class SkStream; +class SkStreamAsset; +struct SkFontArguments; + +class SK_API SkCustomTypefaceBuilder { +public: + SkCustomTypefaceBuilder(); + + void setGlyph(SkGlyphID, float advance, const SkPath&); + void setGlyph(SkGlyphID, float advance, sk_sp, const SkRect& bounds); + + void setMetrics(const SkFontMetrics& fm, float scale = 1); + void setFontStyle(SkFontStyle); + + sk_sp detach(); + + static constexpr SkTypeface::FactoryId FactoryId = SkSetFourByteTag('u','s','e','r'); + static sk_sp MakeFromStream(std::unique_ptr, const SkFontArguments&); + +private: + struct GlyphRec { + // logical union + SkPath fPath; + sk_sp fDrawable; + + SkRect fBounds = {0,0,0,0}; // only used for drawable glyphs atm + float fAdvance = 0; + + bool isDrawable() const { + SkASSERT(!fDrawable || fPath.isEmpty()); + return fDrawable != nullptr; + } + }; + + std::vector fGlyphRecs; + SkFontMetrics fMetrics; + SkFontStyle fStyle; + + GlyphRec& ensureStorage(SkGlyphID); + + static sk_sp Deserialize(SkStream*); + + friend class SkTypeface; + friend class SkUserTypeface; +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkEventTracer.h b/gfx/skia/skia/include/utils/SkEventTracer.h new file mode 100644 index 0000000000..2ec0a3b355 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkEventTracer.h @@ -0,0 +1,90 @@ +/* + * Copyright (C) 2014 Google Inc. All rights reserved. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEventTracer_DEFINED +#define SkEventTracer_DEFINED + +// The class in this header defines the interface between Skia's internal +// tracing macros and an external entity (e.g., Chrome) that will consume them. +// Such an entity should subclass SkEventTracer and provide an instance of +// that event to SkEventTracer::SetInstance. + +// If you're looking for the tracing macros to instrument Skia itself, those +// live in src/core/SkTraceEvent.h + +#include "include/core/SkTypes.h" + +#include + +class SK_API SkEventTracer { +public: + + typedef uint64_t Handle; + + /** + * If this is the first call to SetInstance or GetInstance then the passed instance is + * installed and true is returned. Otherwise, false is returned. In either case ownership of the + * tracer is transferred and it will be deleted when no longer needed. + * + * Not deleting the tracer on process exit should not cause problems as + * the whole heap is about to go away with the process. This can also + * improve performance by reducing the amount of work needed. + * + * @param leakTracer Do not delete tracer on process exit. + */ + static bool SetInstance(SkEventTracer*, bool leakTracer = false); + + /** + * Gets the event tracer. If this is the first call to SetInstance or GetIntance then a default + * event tracer is installed and returned. + */ + static SkEventTracer* GetInstance(); + + virtual ~SkEventTracer() = default; + + // The pointer returned from GetCategoryGroupEnabled() points to a + // value with zero or more of the following bits. Used in this class only. + // The TRACE_EVENT macros should only use the value as a bool. + // These values must be in sync with macro values in trace_event.h in chromium. + enum CategoryGroupEnabledFlags { + // Category group enabled for the recording mode. + kEnabledForRecording_CategoryGroupEnabledFlags = 1 << 0, + // Category group enabled for the monitoring mode. + kEnabledForMonitoring_CategoryGroupEnabledFlags = 1 << 1, + // Category group enabled by SetEventCallbackEnabled(). + kEnabledForEventCallback_CategoryGroupEnabledFlags = 1 << 2, + }; + + virtual const uint8_t* getCategoryGroupEnabled(const char* name) = 0; + virtual const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag) = 0; + + virtual SkEventTracer::Handle + addTraceEvent(char phase, + const uint8_t* categoryEnabledFlag, + const char* name, + uint64_t id, + int32_t numArgs, + const char** argNames, + const uint8_t* argTypes, + const uint64_t* argValues, + uint8_t flags) = 0; + + virtual void + updateTraceEventDuration(const uint8_t* categoryEnabledFlag, + const char* name, + SkEventTracer::Handle handle) = 0; + + // Optional method that can be implemented to allow splitting up traces into different sections. + virtual void newTracingSection(const char*) {} + +protected: + SkEventTracer() = default; + SkEventTracer(const SkEventTracer&) = delete; + SkEventTracer& operator=(const SkEventTracer&) = delete; +}; + +#endif // SkEventTracer_DEFINED diff --git a/gfx/skia/skia/include/utils/SkNWayCanvas.h b/gfx/skia/skia/include/utils/SkNWayCanvas.h new file mode 100644 index 0000000000..87c6916b39 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkNWayCanvas.h @@ -0,0 +1,133 @@ + +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkNWayCanvas_DEFINED +#define SkNWayCanvas_DEFINED + +#include "include/core/SkCanvasVirtualEnforcer.h" +#include "include/core/SkColor.h" +#include "include/core/SkM44.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTDArray.h" +#include "include/utils/SkNoDrawCanvas.h" + +#include + +namespace sktext { +class GlyphRunList; +} + +class SkCanvas; +class SkData; +class SkDrawable; +class SkImage; +class SkMatrix; +class SkPaint; +class SkPath; +class SkPicture; +class SkRRect; +class SkRegion; +class SkShader; +class SkTextBlob; +class SkVertices; +enum class SkBlendMode; +enum class SkClipOp; +struct SkDrawShadowRec; +struct SkPoint; +struct SkRSXform; +struct SkRect; + +#if defined(SK_GANESH) +namespace sktext::gpu { +class Slug; +} +#endif + +class SK_API SkNWayCanvas : public SkCanvasVirtualEnforcer { +public: + SkNWayCanvas(int width, int height); + ~SkNWayCanvas() override; + + virtual void addCanvas(SkCanvas*); + virtual void removeCanvas(SkCanvas*); + virtual void removeAll(); + +protected: + SkTDArray fList; + + void willSave() override; + SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override; + bool onDoSaveBehind(const SkRect*) override; + void willRestore() override; + + void didConcat44(const SkM44&) override; + void didSetM44(const SkM44&) override; + void didScale(SkScalar, SkScalar) override; + void didTranslate(SkScalar, SkScalar) override; + + void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override; + void onDrawGlyphRunList(const sktext::GlyphRunList&, const SkPaint&) override; + void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) override; +#if defined(SK_GANESH) + void onDrawSlug(const sktext::gpu::Slug* slug) override; +#endif + void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode, const SkPaint& paint) override; + + void onDrawPaint(const SkPaint&) override; + void onDrawBehind(const SkPaint&) override; + void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override; + void onDrawRect(const SkRect&, const SkPaint&) override; + void onDrawRegion(const SkRegion&, const SkPaint&) override; + void onDrawOval(const SkRect&, const SkPaint&) override; + void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override; + void onDrawRRect(const SkRRect&, const SkPaint&) override; + void onDrawPath(const SkPath&, const SkPaint&) override; + + void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&, + const SkPaint*) override; + void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&, + const SkPaint*, SrcRectConstraint) override; + void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode, + const SkPaint*) override; + void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int, + SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override; + + void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override; + void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override; + + void onClipRect(const SkRect&, SkClipOp, ClipEdgeStyle) override; + void onClipRRect(const SkRRect&, SkClipOp, ClipEdgeStyle) override; + void onClipPath(const SkPath&, SkClipOp, ClipEdgeStyle) override; + void onClipShader(sk_sp, SkClipOp) override; + void onClipRegion(const SkRegion&, SkClipOp) override; + void onResetClip() override; + + void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override; + void onDrawDrawable(SkDrawable*, const SkMatrix*) override; + void onDrawAnnotation(const SkRect&, const char[], SkData*) override; + + void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&, + SkBlendMode) override; + void onDrawEdgeAAImageSet2(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[], + const SkSamplingOptions&,const SkPaint*, SrcRectConstraint) override; + + void onFlush() override; + + class Iter; + +private: + using INHERITED = SkCanvasVirtualEnforcer; +}; + + +#endif diff --git a/gfx/skia/skia/include/utils/SkNoDrawCanvas.h b/gfx/skia/skia/include/utils/SkNoDrawCanvas.h new file mode 100644 index 0000000000..3f25638738 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkNoDrawCanvas.h @@ -0,0 +1,80 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkNoDrawCanvas_DEFINED +#define SkNoDrawCanvas_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkCanvasVirtualEnforcer.h" + +struct SkIRect; + +// SkNoDrawCanvas is a helper for SkCanvas subclasses which do not need to +// actually rasterize (e.g., analysis of the draw calls). +// +// It provides the following simplifications: +// +// * not backed by any device/pixels +// * conservative clipping (clipping calls only use rectangles) +// +class SK_API SkNoDrawCanvas : public SkCanvasVirtualEnforcer { +public: + SkNoDrawCanvas(int width, int height); + SkNoDrawCanvas(const SkIRect&); + + explicit SkNoDrawCanvas(sk_sp device); + + // Optimization to reset state to be the same as after construction. + void resetCanvas(int w, int h) { this->resetForNextPicture(SkIRect::MakeWH(w, h)); } + void resetCanvas(const SkIRect& rect) { this->resetForNextPicture(rect); } + +protected: + SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override; + bool onDoSaveBehind(const SkRect*) override; + + // No-op overrides for aborting rasterization earlier than SkNullBlitter. + void onDrawAnnotation(const SkRect&, const char[], SkData*) override {} + void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override {} + void onDrawDrawable(SkDrawable*, const SkMatrix*) override {} + void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override {} + void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode, + const SkPaint&) override {} + + void onDrawPaint(const SkPaint&) override {} + void onDrawBehind(const SkPaint&) override {} + void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override {} + void onDrawRect(const SkRect&, const SkPaint&) override {} + void onDrawRegion(const SkRegion&, const SkPaint&) override {} + void onDrawOval(const SkRect&, const SkPaint&) override {} + void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override {} + void onDrawRRect(const SkRRect&, const SkPaint&) override {} + void onDrawPath(const SkPath&, const SkPaint&) override {} + + void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&, + const SkPaint*) override {} + void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&, + const SkPaint*, SrcRectConstraint) override {} + void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode, + const SkPaint*) override {} + void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int, + SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override {} + + void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override {} + void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override {} + void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override {} + + void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&, + SkBlendMode) override {} + void onDrawEdgeAAImageSet2(const ImageSetEntry[], int, const SkPoint[], const SkMatrix[], + const SkSamplingOptions&, const SkPaint*, + SrcRectConstraint) override {} + +private: + using INHERITED = SkCanvasVirtualEnforcer; +}; + +#endif // SkNoDrawCanvas_DEFINED diff --git a/gfx/skia/skia/include/utils/SkNullCanvas.h b/gfx/skia/skia/include/utils/SkNullCanvas.h new file mode 100644 index 0000000000..a77e3e3de9 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkNullCanvas.h @@ -0,0 +1,22 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkNullCanvas_DEFINED +#define SkNullCanvas_DEFINED + +#include "include/core/SkTypes.h" + +#include + +class SkCanvas; + +/** + * Creates a canvas that draws nothing. This is useful for performance testing. + */ +SK_API std::unique_ptr SkMakeNullCanvas(); + +#endif diff --git a/gfx/skia/skia/include/utils/SkOrderedFontMgr.h b/gfx/skia/skia/include/utils/SkOrderedFontMgr.h new file mode 100644 index 0000000000..a03bfdb541 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkOrderedFontMgr.h @@ -0,0 +1,65 @@ +/* + * Copyright 2021 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOrderedFontMgr_DEFINED +#define SkOrderedFontMgr_DEFINED + +#include "include/core/SkFontMgr.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +#include +#include + +class SkData; +class SkFontStyle; +class SkStreamAsset; +class SkString; +class SkTypeface; +struct SkFontArguments; + +/** + * Collects an order list of other font managers, and visits them in order + * when a request to find or match is issued. + * + * Note: this explicitly fails on any attempt to Make a typeface: all of + * those requests will return null. + */ +class SK_API SkOrderedFontMgr : public SkFontMgr { +public: + SkOrderedFontMgr(); + ~SkOrderedFontMgr() override; + + void append(sk_sp); + +protected: + int onCountFamilies() const override; + void onGetFamilyName(int index, SkString* familyName) const override; + SkFontStyleSet* onCreateStyleSet(int index)const override; + + SkFontStyleSet* onMatchFamily(const char familyName[]) const override; + + SkTypeface* onMatchFamilyStyle(const char familyName[], const SkFontStyle&) const override; + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override; + + // Note: all of these always return null + sk_sp onMakeFromData(sk_sp, int ttcIndex) const override; + sk_sp onMakeFromStreamIndex(std::unique_ptr, + int ttcIndex) const override; + sk_sp onMakeFromStreamArgs(std::unique_ptr, + const SkFontArguments&) const override; + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override; + + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle) const override; + +private: + std::vector> fList; +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkPaintFilterCanvas.h b/gfx/skia/skia/include/utils/SkPaintFilterCanvas.h new file mode 100644 index 0000000000..9a836bc7c2 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkPaintFilterCanvas.h @@ -0,0 +1,141 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPaintFilterCanvas_DEFINED +#define SkPaintFilterCanvas_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkCanvasVirtualEnforcer.h" +#include "include/core/SkColor.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTDArray.h" +#include "include/utils/SkNWayCanvas.h" + +#include + +namespace sktext { +class GlyphRunList; +} + +class GrRecordingContext; +class SkData; +class SkDrawable; +class SkImage; +class SkMatrix; +class SkPaint; +class SkPath; +class SkPicture; +class SkPixmap; +class SkRRect; +class SkRegion; +class SkSurface; +class SkSurfaceProps; +class SkTextBlob; +class SkVertices; +enum class SkBlendMode; +struct SkDrawShadowRec; +struct SkPoint; +struct SkRSXform; +struct SkRect; + +/** \class SkPaintFilterCanvas + + A utility proxy base class for implementing draw/paint filters. +*/ +class SK_API SkPaintFilterCanvas : public SkCanvasVirtualEnforcer { +public: + /** + * The new SkPaintFilterCanvas is configured for forwarding to the + * specified canvas. Also copies the target canvas matrix and clip bounds. + */ + SkPaintFilterCanvas(SkCanvas* canvas); + + enum Type { + kPicture_Type, + }; + + // Forwarded to the wrapped canvas. + SkISize getBaseLayerSize() const override { return proxy()->getBaseLayerSize(); } + GrRecordingContext* recordingContext() override { return proxy()->recordingContext(); } + +protected: + /** + * Called with the paint that will be used to draw the specified type. + * The implementation may modify the paint as they wish. + * + * The result bool is used to determine whether the draw op is to be + * executed (true) or skipped (false). + * + * Note: The base implementation calls onFilter() for top-level/explicit paints only. + * To also filter encapsulated paints (e.g. SkPicture, SkTextBlob), clients may need to + * override the relevant methods (i.e. drawPicture, drawTextBlob). + */ + virtual bool onFilter(SkPaint& paint) const = 0; + + void onDrawPaint(const SkPaint&) override; + void onDrawBehind(const SkPaint&) override; + void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override; + void onDrawRect(const SkRect&, const SkPaint&) override; + void onDrawRRect(const SkRRect&, const SkPaint&) override; + void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override; + void onDrawRegion(const SkRegion&, const SkPaint&) override; + void onDrawOval(const SkRect&, const SkPaint&) override; + void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override; + void onDrawPath(const SkPath&, const SkPaint&) override; + + void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&, + const SkPaint*) override; + void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&, + const SkPaint*, SrcRectConstraint) override; + void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode, + const SkPaint*) override; + void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int, + SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override; + + void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override; + void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode, + const SkPaint& paint) override; + void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override; + void onDrawDrawable(SkDrawable*, const SkMatrix*) override; + + void onDrawGlyphRunList(const sktext::GlyphRunList&, const SkPaint&) override; + void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) override; + void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override; + void onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) override; + + void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&, + SkBlendMode) override; + void onDrawEdgeAAImageSet2(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[], + const SkSamplingOptions&,const SkPaint*, SrcRectConstraint) override; + + // Forwarded to the wrapped canvas. + sk_sp onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override; + bool onPeekPixels(SkPixmap* pixmap) override; + bool onAccessTopLayerPixels(SkPixmap* pixmap) override; + SkImageInfo onImageInfo() const override; + bool onGetProps(SkSurfaceProps* props, bool top) const override; + +private: + class AutoPaintFilter; + + SkCanvas* proxy() const { SkASSERT(fList.size() == 1); return fList[0]; } + + SkPaintFilterCanvas* internal_private_asPaintFilterCanvas() const override { + return const_cast(this); + } + + friend class SkAndroidFrameworkUtils; +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkParse.h b/gfx/skia/skia/include/utils/SkParse.h new file mode 100644 index 0000000000..bcabc3c793 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkParse.h @@ -0,0 +1,37 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkParse_DEFINED +#define SkParse_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +#include +#include + +class SK_API SkParse { +public: + static int Count(const char str[]); // number of scalars or int values + static int Count(const char str[], char separator); + static const char* FindColor(const char str[], SkColor* value); + static const char* FindHex(const char str[], uint32_t* value); + static const char* FindMSec(const char str[], SkMSec* value); + static const char* FindNamedColor(const char str[], size_t len, SkColor* color); + static const char* FindS32(const char str[], int32_t* value); + static const char* FindScalar(const char str[], SkScalar* value); + static const char* FindScalars(const char str[], SkScalar value[], int count); + + static bool FindBool(const char str[], bool* value); + // return the index of str in list[], or -1 if not found + static int FindList(const char str[], const char list[]); +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkParsePath.h b/gfx/skia/skia/include/utils/SkParsePath.h new file mode 100644 index 0000000000..acd0ef2305 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkParsePath.h @@ -0,0 +1,25 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkParsePath_DEFINED +#define SkParsePath_DEFINED + +#include "include/core/SkPath.h" + +class SkString; + +class SK_API SkParsePath { +public: + static bool FromSVGString(const char str[], SkPath*); + + enum class PathEncoding { Absolute, Relative }; + static SkString ToSVGString(const SkPath&, PathEncoding = PathEncoding::Absolute); +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkShadowUtils.h b/gfx/skia/skia/include/utils/SkShadowUtils.h new file mode 100644 index 0000000000..b7c43d569f --- /dev/null +++ b/gfx/skia/skia/include/utils/SkShadowUtils.h @@ -0,0 +1,88 @@ + +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkShadowUtils_DEFINED +#define SkShadowUtils_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/SkShadowFlags.h" + +#include + +class SkCanvas; +class SkMatrix; +class SkPath; +struct SkPoint3; +struct SkRect; + +class SK_API SkShadowUtils { +public: + /** + * Draw an offset spot shadow and outlining ambient shadow for the given path using a disc + * light. The shadow may be cached, depending on the path type and canvas matrix. If the + * matrix is perspective or the path is volatile, it will not be cached. + * + * @param canvas The canvas on which to draw the shadows. + * @param path The occluder used to generate the shadows. + * @param zPlaneParams Values for the plane function which returns the Z offset of the + * occluder from the canvas based on local x and y values (the current matrix is not applied). + * @param lightPos Generally, the 3D position of the light relative to the canvas plane. + * If kDirectionalLight_ShadowFlag is set, this specifies a vector pointing + * towards the light. + * @param lightRadius Generally, the radius of the disc light. + * If DirectionalLight_ShadowFlag is set, this specifies the amount of + * blur when the occluder is at Z offset == 1. The blur will grow linearly + * as the Z value increases. + * @param ambientColor The color of the ambient shadow. + * @param spotColor The color of the spot shadow. + * @param flags Options controlling opaque occluder optimizations, shadow appearance, + * and light position. See SkShadowFlags. + */ + static void DrawShadow(SkCanvas* canvas, const SkPath& path, const SkPoint3& zPlaneParams, + const SkPoint3& lightPos, SkScalar lightRadius, + SkColor ambientColor, SkColor spotColor, + uint32_t flags = SkShadowFlags::kNone_ShadowFlag); + + /** + * Generate bounding box for shadows relative to path. Includes both the ambient and spot + * shadow bounds. + * + * @param ctm Current transformation matrix to device space. + * @param path The occluder used to generate the shadows. + * @param zPlaneParams Values for the plane function which returns the Z offset of the + * occluder from the canvas based on local x and y values (the current matrix is not applied). + * @param lightPos Generally, the 3D position of the light relative to the canvas plane. + * If kDirectionalLight_ShadowFlag is set, this specifies a vector pointing + * towards the light. + * @param lightRadius Generally, the radius of the disc light. + * If DirectionalLight_ShadowFlag is set, this specifies the amount of + * blur when the occluder is at Z offset == 1. The blur will grow linearly + * as the Z value increases. + * @param flags Options controlling opaque occluder optimizations, shadow appearance, + * and light position. See SkShadowFlags. + * @param bounds Return value for shadow bounding box. + * @return Returns true if successful, false otherwise. + */ + static bool GetLocalBounds(const SkMatrix& ctm, const SkPath& path, + const SkPoint3& zPlaneParams, const SkPoint3& lightPos, + SkScalar lightRadius, uint32_t flags, SkRect* bounds); + + /** + * Helper routine to compute color values for one-pass tonal alpha. + * + * @param inAmbientColor Original ambient color + * @param inSpotColor Original spot color + * @param outAmbientColor Modified ambient color + * @param outSpotColor Modified spot color + */ + static void ComputeTonalColors(SkColor inAmbientColor, SkColor inSpotColor, + SkColor* outAmbientColor, SkColor* outSpotColor); +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkTextUtils.h b/gfx/skia/skia/include/utils/SkTextUtils.h new file mode 100644 index 0000000000..b73ab771e8 --- /dev/null +++ b/gfx/skia/skia/include/utils/SkTextUtils.h @@ -0,0 +1,43 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTextUtils_DEFINED +#define SkTextUtils_DEFINED + +#include "include/core/SkFontTypes.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +#include +#include + +class SkCanvas; +class SkFont; +class SkPaint; +class SkPath; + +class SK_API SkTextUtils { +public: + enum Align { + kLeft_Align, + kCenter_Align, + kRight_Align, + }; + + static void Draw(SkCanvas*, const void* text, size_t size, SkTextEncoding, + SkScalar x, SkScalar y, const SkFont&, const SkPaint&, Align = kLeft_Align); + + static void DrawString(SkCanvas* canvas, const char text[], SkScalar x, SkScalar y, + const SkFont& font, const SkPaint& paint, Align align = kLeft_Align) { + Draw(canvas, text, strlen(text), SkTextEncoding::kUTF8, x, y, font, paint, align); + } + + static void GetPath(const void* text, size_t length, SkTextEncoding, SkScalar x, SkScalar y, + const SkFont&, SkPath*); +}; + +#endif diff --git a/gfx/skia/skia/include/utils/SkTraceEventPhase.h b/gfx/skia/skia/include/utils/SkTraceEventPhase.h new file mode 100644 index 0000000000..38457be24b --- /dev/null +++ b/gfx/skia/skia/include/utils/SkTraceEventPhase.h @@ -0,0 +1,19 @@ +// Copyright 2018 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +#ifndef SkTraceEventPhase_DEFINED +#define SkTraceEventPhase_DEFINED + +// Phase indicates the nature of an event entry. E.g. part of a begin/end pair. +#define TRACE_EVENT_PHASE_BEGIN ('B') +#define TRACE_EVENT_PHASE_END ('E') +#define TRACE_EVENT_PHASE_COMPLETE ('X') +#define TRACE_EVENT_PHASE_INSTANT ('I') +#define TRACE_EVENT_PHASE_ASYNC_BEGIN ('S') +#define TRACE_EVENT_PHASE_ASYNC_END ('F') +#define TRACE_EVENT_PHASE_COUNTER ('C') +#define TRACE_EVENT_PHASE_CREATE_OBJECT ('N') +#define TRACE_EVENT_PHASE_SNAPSHOT_OBJECT ('O') +#define TRACE_EVENT_PHASE_DELETE_OBJECT ('D') + +#endif // SkTraceEventPhase_DEFINED diff --git a/gfx/skia/skia/include/utils/mac/SkCGUtils.h b/gfx/skia/skia/include/utils/mac/SkCGUtils.h new file mode 100644 index 0000000000..a320dd8d4c --- /dev/null +++ b/gfx/skia/skia/include/utils/mac/SkCGUtils.h @@ -0,0 +1,78 @@ + +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkCGUtils_DEFINED +#define SkCGUtils_DEFINED + +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkSize.h" + +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#ifdef SK_BUILD_FOR_MAC +#include +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#endif + +class SkBitmap; +class SkData; +class SkPixmap; +class SkStreamRewindable; + +SK_API CGContextRef SkCreateCGContext(const SkPixmap&); + +/** + * Given a CGImage, allocate an SkBitmap and copy the image's pixels into it. If scaleToFit is not + * null, use it to determine the size of the bitmap, and scale the image to fill the bitmap. + * Otherwise use the image's width/height. + * + * On failure, return false, and leave bitmap unchanged. + */ +SK_API bool SkCreateBitmapFromCGImage(SkBitmap* dst, CGImageRef src); + +SK_API sk_sp SkMakeImageFromCGImage(CGImageRef); + +/** + * Copy the pixels from src into the memory specified by info/rowBytes/dstPixels. On failure, + * return false (e.g. ImageInfo incompatible with src). + */ +SK_API bool SkCopyPixelsFromCGImage(const SkImageInfo& info, size_t rowBytes, void* dstPixels, + CGImageRef src); +static inline bool SkCopyPixelsFromCGImage(const SkPixmap& dst, CGImageRef src) { + return SkCopyPixelsFromCGImage(dst.info(), dst.rowBytes(), dst.writable_addr(), src); +} + +/** + * Create an imageref from the specified bitmap using the specified colorspace. + * If space is NULL, then CGColorSpaceCreateDeviceRGB() is used. + */ +SK_API CGImageRef SkCreateCGImageRefWithColorspace(const SkBitmap& bm, + CGColorSpaceRef space); + +/** + * Create an imageref from the specified bitmap using the colorspace returned + * by CGColorSpaceCreateDeviceRGB() + */ +static inline CGImageRef SkCreateCGImageRef(const SkBitmap& bm) { + return SkCreateCGImageRefWithColorspace(bm, nil); +} + +/** + * Draw the bitmap into the specified CG context. The bitmap will be converted + * to a CGImage using the generic RGB colorspace. (x,y) specifies the position + * of the top-left corner of the bitmap. The bitmap is converted using the + * colorspace returned by CGColorSpaceCreateDeviceRGB() + */ +void SkCGDrawBitmap(CGContextRef, const SkBitmap&, float x, float y); + +#endif // defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) +#endif // SkCGUtils_DEFINED diff --git a/gfx/skia/skia/modules/skcms/README.chromium b/gfx/skia/skia/modules/skcms/README.chromium new file mode 100644 index 0000000000..046f6b1d19 --- /dev/null +++ b/gfx/skia/skia/modules/skcms/README.chromium @@ -0,0 +1,5 @@ +Name: skcms +URL: https://skia.org/ +Version: unknown +Security Critical: yes +License: BSD diff --git a/gfx/skia/skia/modules/skcms/skcms.cc b/gfx/skia/skia/modules/skcms/skcms.cc new file mode 100644 index 0000000000..246c08af94 --- /dev/null +++ b/gfx/skia/skia/modules/skcms/skcms.cc @@ -0,0 +1,3064 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "skcms.h" +#include "skcms_internal.h" +#include +#include +#include +#include +#include + +#if defined(__ARM_NEON) + #include +#elif defined(__SSE__) + #include + + #if defined(__clang__) + // That #include is usually enough, but Clang's headers + // "helpfully" skip including the whole kitchen sink when _MSC_VER is + // defined, because lots of programs on Windows would include that and + // it'd be a lot slower. But we want all those headers included so we + // can use their features after runtime checks later. + #include + #include + #include + #include + #include + #endif +#endif + +static bool runtime_cpu_detection = true; +void skcms_DisableRuntimeCPUDetection() { + runtime_cpu_detection = false; +} + +// sizeof(x) will return size_t, which is 32-bit on some machines and 64-bit on others. +// We have better testing on 64-bit machines, so force 32-bit machines to behave like 64-bit. +// +// Please do not use sizeof() directly, and size_t only when required. +// (We have no way of enforcing these requests...) +#define SAFE_SIZEOF(x) ((uint64_t)sizeof(x)) + +// Same sort of thing for _Layout structs with a variable sized array at the end (named "variable"). +#define SAFE_FIXED_SIZE(type) ((uint64_t)offsetof(type, variable)) + +static const union { + uint32_t bits; + float f; +} inf_ = { 0x7f800000 }; +#define INFINITY_ inf_.f + +#if defined(__clang__) || defined(__GNUC__) + #define small_memcpy __builtin_memcpy +#else + #define small_memcpy memcpy +#endif + +static float log2f_(float x) { + // The first approximation of log2(x) is its exponent 'e', minus 127. + int32_t bits; + small_memcpy(&bits, &x, sizeof(bits)); + + float e = (float)bits * (1.0f / (1<<23)); + + // If we use the mantissa too we can refine the error signficantly. + int32_t m_bits = (bits & 0x007fffff) | 0x3f000000; + float m; + small_memcpy(&m, &m_bits, sizeof(m)); + + return (e - 124.225514990f + - 1.498030302f*m + - 1.725879990f/(0.3520887068f + m)); +} +static float logf_(float x) { + const float ln2 = 0.69314718f; + return ln2*log2f_(x); +} + +static float exp2f_(float x) { + float fract = x - floorf_(x); + + float fbits = (1.0f * (1<<23)) * (x + 121.274057500f + - 1.490129070f*fract + + 27.728023300f/(4.84252568f - fract)); + + // Before we cast fbits to int32_t, check for out of range values to pacify UBSAN. + // INT_MAX is not exactly representable as a float, so exclude it as effectively infinite. + // Negative values are effectively underflow - we'll end up returning a (different) negative + // value, which makes no sense. So clamp to zero. + if (fbits >= (float)INT_MAX) { + return INFINITY_; + } else if (fbits < 0) { + return 0; + } + + int32_t bits = (int32_t)fbits; + small_memcpy(&x, &bits, sizeof(x)); + return x; +} + +// Not static, as it's used by some test tools. +float powf_(float x, float y) { + assert (x >= 0); + return (x == 0) || (x == 1) ? x + : exp2f_(log2f_(x) * y); +} + +static float expf_(float x) { + const float log2_e = 1.4426950408889634074f; + return exp2f_(log2_e * x); +} + +static float fmaxf_(float x, float y) { return x > y ? x : y; } +static float fminf_(float x, float y) { return x < y ? x : y; } + +static bool isfinitef_(float x) { return 0 == x*0; } + +static float minus_1_ulp(float x) { + int32_t bits; + memcpy(&bits, &x, sizeof(bits)); + bits = bits - 1; + memcpy(&x, &bits, sizeof(bits)); + return x; +} + +// Most transfer functions we work with are sRGBish. +// For exotic HDR transfer functions, we encode them using a tf.g that makes no sense, +// and repurpose the other fields to hold the parameters of the HDR functions. +struct TF_PQish { float A,B,C,D,E,F; }; +struct TF_HLGish { float R,G,a,b,c,K_minus_1; }; +// We didn't originally support a scale factor K for HLG, and instead just stored 0 in +// the unused `f` field of skcms_TransferFunction for HLGish and HLGInvish transfer functions. +// By storing f=K-1, those old unusued f=0 values now mean K=1, a noop scale factor. + +static float TFKind_marker(skcms_TFType kind) { + // We'd use different NaNs, but those aren't guaranteed to be preserved by WASM. + return -(float)kind; +} + +static skcms_TFType classify(const skcms_TransferFunction& tf, TF_PQish* pq = nullptr + , TF_HLGish* hlg = nullptr) { + if (tf.g < 0 && static_cast(static_cast(tf.g)) == tf.g) { + // TODO: soundness checks for PQ/HLG like we do for sRGBish? + switch ((int)tf.g) { + case -skcms_TFType_PQish: + if (pq) { + memcpy(pq , &tf.a, sizeof(*pq )); + } + return skcms_TFType_PQish; + case -skcms_TFType_HLGish: + if (hlg) { + memcpy(hlg, &tf.a, sizeof(*hlg)); + } + return skcms_TFType_HLGish; + case -skcms_TFType_HLGinvish: + if (hlg) { + memcpy(hlg, &tf.a, sizeof(*hlg)); + } + return skcms_TFType_HLGinvish; + } + return skcms_TFType_Invalid; + } + + // Basic soundness checks for sRGBish transfer functions. + if (isfinitef_(tf.a + tf.b + tf.c + tf.d + tf.e + tf.f + tf.g) + // a,c,d,g should be non-negative to make any sense. + && tf.a >= 0 + && tf.c >= 0 + && tf.d >= 0 + && tf.g >= 0 + // Raising a negative value to a fractional tf->g produces complex numbers. + && tf.a * tf.d + tf.b >= 0) { + return skcms_TFType_sRGBish; + } + + return skcms_TFType_Invalid; +} + +skcms_TFType skcms_TransferFunction_getType(const skcms_TransferFunction* tf) { + return classify(*tf); +} +bool skcms_TransferFunction_isSRGBish(const skcms_TransferFunction* tf) { + return classify(*tf) == skcms_TFType_sRGBish; +} +bool skcms_TransferFunction_isPQish(const skcms_TransferFunction* tf) { + return classify(*tf) == skcms_TFType_PQish; +} +bool skcms_TransferFunction_isHLGish(const skcms_TransferFunction* tf) { + return classify(*tf) == skcms_TFType_HLGish; +} + +bool skcms_TransferFunction_makePQish(skcms_TransferFunction* tf, + float A, float B, float C, + float D, float E, float F) { + *tf = { TFKind_marker(skcms_TFType_PQish), A,B,C,D,E,F }; + assert(skcms_TransferFunction_isPQish(tf)); + return true; +} + +bool skcms_TransferFunction_makeScaledHLGish(skcms_TransferFunction* tf, + float K, float R, float G, + float a, float b, float c) { + *tf = { TFKind_marker(skcms_TFType_HLGish), R,G, a,b,c, K-1.0f }; + assert(skcms_TransferFunction_isHLGish(tf)); + return true; +} + +float skcms_TransferFunction_eval(const skcms_TransferFunction* tf, float x) { + float sign = x < 0 ? -1.0f : 1.0f; + x *= sign; + + TF_PQish pq; + TF_HLGish hlg; + switch (classify(*tf, &pq, &hlg)) { + case skcms_TFType_Invalid: break; + + case skcms_TFType_HLGish: { + const float K = hlg.K_minus_1 + 1.0f; + return K * sign * (x*hlg.R <= 1 ? powf_(x*hlg.R, hlg.G) + : expf_((x-hlg.c)*hlg.a) + hlg.b); + } + + // skcms_TransferFunction_invert() inverts R, G, and a for HLGinvish so this math is fast. + case skcms_TFType_HLGinvish: { + const float K = hlg.K_minus_1 + 1.0f; + x /= K; + return sign * (x <= 1 ? hlg.R * powf_(x, hlg.G) + : hlg.a * logf_(x - hlg.b) + hlg.c); + } + + case skcms_TFType_sRGBish: + return sign * (x < tf->d ? tf->c * x + tf->f + : powf_(tf->a * x + tf->b, tf->g) + tf->e); + + case skcms_TFType_PQish: return sign * powf_(fmaxf_(pq.A + pq.B * powf_(x, pq.C), 0) + / (pq.D + pq.E * powf_(x, pq.C)), + pq.F); + } + return 0; +} + + +static float eval_curve(const skcms_Curve* curve, float x) { + if (curve->table_entries == 0) { + return skcms_TransferFunction_eval(&curve->parametric, x); + } + + float ix = fmaxf_(0, fminf_(x, 1)) * static_cast(curve->table_entries - 1); + int lo = (int) ix , + hi = (int)(float)minus_1_ulp(ix + 1.0f); + float t = ix - (float)lo; + + float l, h; + if (curve->table_8) { + l = curve->table_8[lo] * (1/255.0f); + h = curve->table_8[hi] * (1/255.0f); + } else { + uint16_t be_l, be_h; + memcpy(&be_l, curve->table_16 + 2*lo, 2); + memcpy(&be_h, curve->table_16 + 2*hi, 2); + uint16_t le_l = ((be_l << 8) | (be_l >> 8)) & 0xffff; + uint16_t le_h = ((be_h << 8) | (be_h >> 8)) & 0xffff; + l = le_l * (1/65535.0f); + h = le_h * (1/65535.0f); + } + return l + (h-l)*t; +} + +float skcms_MaxRoundtripError(const skcms_Curve* curve, const skcms_TransferFunction* inv_tf) { + uint32_t N = curve->table_entries > 256 ? curve->table_entries : 256; + const float dx = 1.0f / static_cast(N - 1); + float err = 0; + for (uint32_t i = 0; i < N; i++) { + float x = static_cast(i) * dx, + y = eval_curve(curve, x); + err = fmaxf_(err, fabsf_(x - skcms_TransferFunction_eval(inv_tf, y))); + } + return err; +} + +bool skcms_AreApproximateInverses(const skcms_Curve* curve, const skcms_TransferFunction* inv_tf) { + return skcms_MaxRoundtripError(curve, inv_tf) < (1/512.0f); +} + +// Additional ICC signature values that are only used internally +enum { + // File signature + skcms_Signature_acsp = 0x61637370, + + // Tag signatures + skcms_Signature_rTRC = 0x72545243, + skcms_Signature_gTRC = 0x67545243, + skcms_Signature_bTRC = 0x62545243, + skcms_Signature_kTRC = 0x6B545243, + + skcms_Signature_rXYZ = 0x7258595A, + skcms_Signature_gXYZ = 0x6758595A, + skcms_Signature_bXYZ = 0x6258595A, + + skcms_Signature_A2B0 = 0x41324230, + skcms_Signature_B2A0 = 0x42324130, + + skcms_Signature_CHAD = 0x63686164, + skcms_Signature_WTPT = 0x77747074, + + skcms_Signature_CICP = 0x63696370, + + // Type signatures + skcms_Signature_curv = 0x63757276, + skcms_Signature_mft1 = 0x6D667431, + skcms_Signature_mft2 = 0x6D667432, + skcms_Signature_mAB = 0x6D414220, + skcms_Signature_mBA = 0x6D424120, + skcms_Signature_para = 0x70617261, + skcms_Signature_sf32 = 0x73663332, + // XYZ is also a PCS signature, so it's defined in skcms.h + // skcms_Signature_XYZ = 0x58595A20, +}; + +static uint16_t read_big_u16(const uint8_t* ptr) { + uint16_t be; + memcpy(&be, ptr, sizeof(be)); +#if defined(_MSC_VER) + return _byteswap_ushort(be); +#else + return __builtin_bswap16(be); +#endif +} + +static uint32_t read_big_u32(const uint8_t* ptr) { + uint32_t be; + memcpy(&be, ptr, sizeof(be)); +#if defined(_MSC_VER) + return _byteswap_ulong(be); +#else + return __builtin_bswap32(be); +#endif +} + +static int32_t read_big_i32(const uint8_t* ptr) { + return (int32_t)read_big_u32(ptr); +} + +static float read_big_fixed(const uint8_t* ptr) { + return static_cast(read_big_i32(ptr)) * (1.0f / 65536.0f); +} + +// Maps to an in-memory profile so that fields line up to the locations specified +// in ICC.1:2010, section 7.2 +typedef struct { + uint8_t size [ 4]; + uint8_t cmm_type [ 4]; + uint8_t version [ 4]; + uint8_t profile_class [ 4]; + uint8_t data_color_space [ 4]; + uint8_t pcs [ 4]; + uint8_t creation_date_time [12]; + uint8_t signature [ 4]; + uint8_t platform [ 4]; + uint8_t flags [ 4]; + uint8_t device_manufacturer [ 4]; + uint8_t device_model [ 4]; + uint8_t device_attributes [ 8]; + uint8_t rendering_intent [ 4]; + uint8_t illuminant_X [ 4]; + uint8_t illuminant_Y [ 4]; + uint8_t illuminant_Z [ 4]; + uint8_t creator [ 4]; + uint8_t profile_id [16]; + uint8_t reserved [28]; + uint8_t tag_count [ 4]; // Technically not part of header, but required +} header_Layout; + +typedef struct { + uint8_t signature [4]; + uint8_t offset [4]; + uint8_t size [4]; +} tag_Layout; + +static const tag_Layout* get_tag_table(const skcms_ICCProfile* profile) { + return (const tag_Layout*)(profile->buffer + SAFE_SIZEOF(header_Layout)); +} + +// s15Fixed16ArrayType is technically variable sized, holding N values. However, the only valid +// use of the type is for the CHAD tag that stores exactly nine values. +typedef struct { + uint8_t type [ 4]; + uint8_t reserved [ 4]; + uint8_t values [36]; +} sf32_Layout; + +bool skcms_GetCHAD(const skcms_ICCProfile* profile, skcms_Matrix3x3* m) { + skcms_ICCTag tag; + if (!skcms_GetTagBySignature(profile, skcms_Signature_CHAD, &tag)) { + return false; + } + + if (tag.type != skcms_Signature_sf32 || tag.size < SAFE_SIZEOF(sf32_Layout)) { + return false; + } + + const sf32_Layout* sf32Tag = (const sf32_Layout*)tag.buf; + const uint8_t* values = sf32Tag->values; + for (int r = 0; r < 3; ++r) + for (int c = 0; c < 3; ++c, values += 4) { + m->vals[r][c] = read_big_fixed(values); + } + return true; +} + +// XYZType is technically variable sized, holding N XYZ triples. However, the only valid uses of +// the type are for tags/data that store exactly one triple. +typedef struct { + uint8_t type [4]; + uint8_t reserved [4]; + uint8_t X [4]; + uint8_t Y [4]; + uint8_t Z [4]; +} XYZ_Layout; + +static bool read_tag_xyz(const skcms_ICCTag* tag, float* x, float* y, float* z) { + if (tag->type != skcms_Signature_XYZ || tag->size < SAFE_SIZEOF(XYZ_Layout)) { + return false; + } + + const XYZ_Layout* xyzTag = (const XYZ_Layout*)tag->buf; + + *x = read_big_fixed(xyzTag->X); + *y = read_big_fixed(xyzTag->Y); + *z = read_big_fixed(xyzTag->Z); + return true; +} + +bool skcms_GetWTPT(const skcms_ICCProfile* profile, float xyz[3]) { + skcms_ICCTag tag; + return skcms_GetTagBySignature(profile, skcms_Signature_WTPT, &tag) && + read_tag_xyz(&tag, &xyz[0], &xyz[1], &xyz[2]); +} + +static bool read_to_XYZD50(const skcms_ICCTag* rXYZ, const skcms_ICCTag* gXYZ, + const skcms_ICCTag* bXYZ, skcms_Matrix3x3* toXYZ) { + return read_tag_xyz(rXYZ, &toXYZ->vals[0][0], &toXYZ->vals[1][0], &toXYZ->vals[2][0]) && + read_tag_xyz(gXYZ, &toXYZ->vals[0][1], &toXYZ->vals[1][1], &toXYZ->vals[2][1]) && + read_tag_xyz(bXYZ, &toXYZ->vals[0][2], &toXYZ->vals[1][2], &toXYZ->vals[2][2]); +} + +typedef struct { + uint8_t type [4]; + uint8_t reserved_a [4]; + uint8_t function_type [2]; + uint8_t reserved_b [2]; + uint8_t variable [1/*variable*/]; // 1, 3, 4, 5, or 7 s15.16, depending on function_type +} para_Layout; + +static bool read_curve_para(const uint8_t* buf, uint32_t size, + skcms_Curve* curve, uint32_t* curve_size) { + if (size < SAFE_FIXED_SIZE(para_Layout)) { + return false; + } + + const para_Layout* paraTag = (const para_Layout*)buf; + + enum { kG = 0, kGAB = 1, kGABC = 2, kGABCD = 3, kGABCDEF = 4 }; + uint16_t function_type = read_big_u16(paraTag->function_type); + if (function_type > kGABCDEF) { + return false; + } + + static const uint32_t curve_bytes[] = { 4, 12, 16, 20, 28 }; + if (size < SAFE_FIXED_SIZE(para_Layout) + curve_bytes[function_type]) { + return false; + } + + if (curve_size) { + *curve_size = SAFE_FIXED_SIZE(para_Layout) + curve_bytes[function_type]; + } + + curve->table_entries = 0; + curve->parametric.a = 1.0f; + curve->parametric.b = 0.0f; + curve->parametric.c = 0.0f; + curve->parametric.d = 0.0f; + curve->parametric.e = 0.0f; + curve->parametric.f = 0.0f; + curve->parametric.g = read_big_fixed(paraTag->variable); + + switch (function_type) { + case kGAB: + curve->parametric.a = read_big_fixed(paraTag->variable + 4); + curve->parametric.b = read_big_fixed(paraTag->variable + 8); + if (curve->parametric.a == 0) { + return false; + } + curve->parametric.d = -curve->parametric.b / curve->parametric.a; + break; + case kGABC: + curve->parametric.a = read_big_fixed(paraTag->variable + 4); + curve->parametric.b = read_big_fixed(paraTag->variable + 8); + curve->parametric.e = read_big_fixed(paraTag->variable + 12); + if (curve->parametric.a == 0) { + return false; + } + curve->parametric.d = -curve->parametric.b / curve->parametric.a; + curve->parametric.f = curve->parametric.e; + break; + case kGABCD: + curve->parametric.a = read_big_fixed(paraTag->variable + 4); + curve->parametric.b = read_big_fixed(paraTag->variable + 8); + curve->parametric.c = read_big_fixed(paraTag->variable + 12); + curve->parametric.d = read_big_fixed(paraTag->variable + 16); + break; + case kGABCDEF: + curve->parametric.a = read_big_fixed(paraTag->variable + 4); + curve->parametric.b = read_big_fixed(paraTag->variable + 8); + curve->parametric.c = read_big_fixed(paraTag->variable + 12); + curve->parametric.d = read_big_fixed(paraTag->variable + 16); + curve->parametric.e = read_big_fixed(paraTag->variable + 20); + curve->parametric.f = read_big_fixed(paraTag->variable + 24); + break; + } + return skcms_TransferFunction_isSRGBish(&curve->parametric); +} + +typedef struct { + uint8_t type [4]; + uint8_t reserved [4]; + uint8_t value_count [4]; + uint8_t variable [1/*variable*/]; // value_count, 8.8 if 1, uint16 (n*65535) if > 1 +} curv_Layout; + +static bool read_curve_curv(const uint8_t* buf, uint32_t size, + skcms_Curve* curve, uint32_t* curve_size) { + if (size < SAFE_FIXED_SIZE(curv_Layout)) { + return false; + } + + const curv_Layout* curvTag = (const curv_Layout*)buf; + + uint32_t value_count = read_big_u32(curvTag->value_count); + if (size < SAFE_FIXED_SIZE(curv_Layout) + value_count * SAFE_SIZEOF(uint16_t)) { + return false; + } + + if (curve_size) { + *curve_size = SAFE_FIXED_SIZE(curv_Layout) + value_count * SAFE_SIZEOF(uint16_t); + } + + if (value_count < 2) { + curve->table_entries = 0; + curve->parametric.a = 1.0f; + curve->parametric.b = 0.0f; + curve->parametric.c = 0.0f; + curve->parametric.d = 0.0f; + curve->parametric.e = 0.0f; + curve->parametric.f = 0.0f; + if (value_count == 0) { + // Empty tables are a shorthand for an identity curve + curve->parametric.g = 1.0f; + } else { + // Single entry tables are a shorthand for simple gamma + curve->parametric.g = read_big_u16(curvTag->variable) * (1.0f / 256.0f); + } + } else { + curve->table_8 = nullptr; + curve->table_16 = curvTag->variable; + curve->table_entries = value_count; + } + + return true; +} + +// Parses both curveType and parametricCurveType data. Ensures that at most 'size' bytes are read. +// If curve_size is not nullptr, writes the number of bytes used by the curve in (*curve_size). +static bool read_curve(const uint8_t* buf, uint32_t size, + skcms_Curve* curve, uint32_t* curve_size) { + if (!buf || size < 4 || !curve) { + return false; + } + + uint32_t type = read_big_u32(buf); + if (type == skcms_Signature_para) { + return read_curve_para(buf, size, curve, curve_size); + } else if (type == skcms_Signature_curv) { + return read_curve_curv(buf, size, curve, curve_size); + } + + return false; +} + +// mft1 and mft2 share a large chunk of data +typedef struct { + uint8_t type [ 4]; + uint8_t reserved_a [ 4]; + uint8_t input_channels [ 1]; + uint8_t output_channels [ 1]; + uint8_t grid_points [ 1]; + uint8_t reserved_b [ 1]; + uint8_t matrix [36]; +} mft_CommonLayout; + +typedef struct { + mft_CommonLayout common [1]; + + uint8_t variable [1/*variable*/]; +} mft1_Layout; + +typedef struct { + mft_CommonLayout common [1]; + + uint8_t input_table_entries [2]; + uint8_t output_table_entries [2]; + uint8_t variable [1/*variable*/]; +} mft2_Layout; + +static bool read_mft_common(const mft_CommonLayout* mftTag, skcms_A2B* a2b) { + // MFT matrices are applied before the first set of curves, but must be identity unless the + // input is PCSXYZ. We don't support PCSXYZ profiles, so we ignore this matrix. Note that the + // matrix in skcms_A2B is applied later in the pipe, so supporting this would require another + // field/flag. + a2b->matrix_channels = 0; + a2b-> input_channels = mftTag-> input_channels[0]; + a2b->output_channels = mftTag->output_channels[0]; + + // We require exactly three (ie XYZ/Lab/RGB) output channels + if (a2b->output_channels != ARRAY_COUNT(a2b->output_curves)) { + return false; + } + // We require at least one, and no more than four (ie CMYK) input channels + if (a2b->input_channels < 1 || a2b->input_channels > ARRAY_COUNT(a2b->input_curves)) { + return false; + } + + for (uint32_t i = 0; i < a2b->input_channels; ++i) { + a2b->grid_points[i] = mftTag->grid_points[0]; + } + // The grid only makes sense with at least two points along each axis + if (a2b->grid_points[0] < 2) { + return false; + } + return true; +} + +// All as the A2B version above, except where noted. +static bool read_mft_common(const mft_CommonLayout* mftTag, skcms_B2A* b2a) { + // Same as A2B. + b2a->matrix_channels = 0; + b2a-> input_channels = mftTag-> input_channels[0]; + b2a->output_channels = mftTag->output_channels[0]; + + + // For B2A, exactly 3 input channels (XYZ) and 3 (RGB) or 4 (CMYK) output channels. + if (b2a->input_channels != ARRAY_COUNT(b2a->input_curves)) { + return false; + } + if (b2a->output_channels < 3 || b2a->output_channels > ARRAY_COUNT(b2a->output_curves)) { + return false; + } + + // Same as A2B. + for (uint32_t i = 0; i < b2a->input_channels; ++i) { + b2a->grid_points[i] = mftTag->grid_points[0]; + } + if (b2a->grid_points[0] < 2) { + return false; + } + return true; +} + +template +static bool init_tables(const uint8_t* table_base, uint64_t max_tables_len, uint32_t byte_width, + uint32_t input_table_entries, uint32_t output_table_entries, + A2B_or_B2A* out) { + // byte_width is 1 or 2, [input|output]_table_entries are in [2, 4096], so no overflow + uint32_t byte_len_per_input_table = input_table_entries * byte_width; + uint32_t byte_len_per_output_table = output_table_entries * byte_width; + + // [input|output]_channels are <= 4, so still no overflow + uint32_t byte_len_all_input_tables = out->input_channels * byte_len_per_input_table; + uint32_t byte_len_all_output_tables = out->output_channels * byte_len_per_output_table; + + uint64_t grid_size = out->output_channels * byte_width; + for (uint32_t axis = 0; axis < out->input_channels; ++axis) { + grid_size *= out->grid_points[axis]; + } + + if (max_tables_len < byte_len_all_input_tables + grid_size + byte_len_all_output_tables) { + return false; + } + + for (uint32_t i = 0; i < out->input_channels; ++i) { + out->input_curves[i].table_entries = input_table_entries; + if (byte_width == 1) { + out->input_curves[i].table_8 = table_base + i * byte_len_per_input_table; + out->input_curves[i].table_16 = nullptr; + } else { + out->input_curves[i].table_8 = nullptr; + out->input_curves[i].table_16 = table_base + i * byte_len_per_input_table; + } + } + + if (byte_width == 1) { + out->grid_8 = table_base + byte_len_all_input_tables; + out->grid_16 = nullptr; + } else { + out->grid_8 = nullptr; + out->grid_16 = table_base + byte_len_all_input_tables; + } + + const uint8_t* output_table_base = table_base + byte_len_all_input_tables + grid_size; + for (uint32_t i = 0; i < out->output_channels; ++i) { + out->output_curves[i].table_entries = output_table_entries; + if (byte_width == 1) { + out->output_curves[i].table_8 = output_table_base + i * byte_len_per_output_table; + out->output_curves[i].table_16 = nullptr; + } else { + out->output_curves[i].table_8 = nullptr; + out->output_curves[i].table_16 = output_table_base + i * byte_len_per_output_table; + } + } + + return true; +} + +template +static bool read_tag_mft1(const skcms_ICCTag* tag, A2B_or_B2A* out) { + if (tag->size < SAFE_FIXED_SIZE(mft1_Layout)) { + return false; + } + + const mft1_Layout* mftTag = (const mft1_Layout*)tag->buf; + if (!read_mft_common(mftTag->common, out)) { + return false; + } + + uint32_t input_table_entries = 256; + uint32_t output_table_entries = 256; + + return init_tables(mftTag->variable, tag->size - SAFE_FIXED_SIZE(mft1_Layout), 1, + input_table_entries, output_table_entries, out); +} + +template +static bool read_tag_mft2(const skcms_ICCTag* tag, A2B_or_B2A* out) { + if (tag->size < SAFE_FIXED_SIZE(mft2_Layout)) { + return false; + } + + const mft2_Layout* mftTag = (const mft2_Layout*)tag->buf; + if (!read_mft_common(mftTag->common, out)) { + return false; + } + + uint32_t input_table_entries = read_big_u16(mftTag->input_table_entries); + uint32_t output_table_entries = read_big_u16(mftTag->output_table_entries); + + // ICC spec mandates that 2 <= table_entries <= 4096 + if (input_table_entries < 2 || input_table_entries > 4096 || + output_table_entries < 2 || output_table_entries > 4096) { + return false; + } + + return init_tables(mftTag->variable, tag->size - SAFE_FIXED_SIZE(mft2_Layout), 2, + input_table_entries, output_table_entries, out); +} + +static bool read_curves(const uint8_t* buf, uint32_t size, uint32_t curve_offset, + uint32_t num_curves, skcms_Curve* curves) { + for (uint32_t i = 0; i < num_curves; ++i) { + if (curve_offset > size) { + return false; + } + + uint32_t curve_bytes; + if (!read_curve(buf + curve_offset, size - curve_offset, &curves[i], &curve_bytes)) { + return false; + } + + if (curve_bytes > UINT32_MAX - 3) { + return false; + } + curve_bytes = (curve_bytes + 3) & ~3U; + + uint64_t new_offset_64 = (uint64_t)curve_offset + curve_bytes; + curve_offset = (uint32_t)new_offset_64; + if (new_offset_64 != curve_offset) { + return false; + } + } + + return true; +} + +// mAB and mBA tags use the same encoding, including color lookup tables. +typedef struct { + uint8_t type [ 4]; + uint8_t reserved_a [ 4]; + uint8_t input_channels [ 1]; + uint8_t output_channels [ 1]; + uint8_t reserved_b [ 2]; + uint8_t b_curve_offset [ 4]; + uint8_t matrix_offset [ 4]; + uint8_t m_curve_offset [ 4]; + uint8_t clut_offset [ 4]; + uint8_t a_curve_offset [ 4]; +} mAB_or_mBA_Layout; + +typedef struct { + uint8_t grid_points [16]; + uint8_t grid_byte_width [ 1]; + uint8_t reserved [ 3]; + uint8_t variable [1/*variable*/]; +} CLUT_Layout; + +static bool read_tag_mab(const skcms_ICCTag* tag, skcms_A2B* a2b, bool pcs_is_xyz) { + if (tag->size < SAFE_SIZEOF(mAB_or_mBA_Layout)) { + return false; + } + + const mAB_or_mBA_Layout* mABTag = (const mAB_or_mBA_Layout*)tag->buf; + + a2b->input_channels = mABTag->input_channels[0]; + a2b->output_channels = mABTag->output_channels[0]; + + // We require exactly three (ie XYZ/Lab/RGB) output channels + if (a2b->output_channels != ARRAY_COUNT(a2b->output_curves)) { + return false; + } + // We require no more than four (ie CMYK) input channels + if (a2b->input_channels > ARRAY_COUNT(a2b->input_curves)) { + return false; + } + + uint32_t b_curve_offset = read_big_u32(mABTag->b_curve_offset); + uint32_t matrix_offset = read_big_u32(mABTag->matrix_offset); + uint32_t m_curve_offset = read_big_u32(mABTag->m_curve_offset); + uint32_t clut_offset = read_big_u32(mABTag->clut_offset); + uint32_t a_curve_offset = read_big_u32(mABTag->a_curve_offset); + + // "B" curves must be present + if (0 == b_curve_offset) { + return false; + } + + if (!read_curves(tag->buf, tag->size, b_curve_offset, a2b->output_channels, + a2b->output_curves)) { + return false; + } + + // "M" curves and Matrix must be used together + if (0 != m_curve_offset) { + if (0 == matrix_offset) { + return false; + } + a2b->matrix_channels = a2b->output_channels; + if (!read_curves(tag->buf, tag->size, m_curve_offset, a2b->matrix_channels, + a2b->matrix_curves)) { + return false; + } + + // Read matrix, which is stored as a row-major 3x3, followed by the fourth column + if (tag->size < matrix_offset + 12 * SAFE_SIZEOF(uint32_t)) { + return false; + } + float encoding_factor = pcs_is_xyz ? (65535 / 32768.0f) : 1.0f; + const uint8_t* mtx_buf = tag->buf + matrix_offset; + a2b->matrix.vals[0][0] = encoding_factor * read_big_fixed(mtx_buf + 0); + a2b->matrix.vals[0][1] = encoding_factor * read_big_fixed(mtx_buf + 4); + a2b->matrix.vals[0][2] = encoding_factor * read_big_fixed(mtx_buf + 8); + a2b->matrix.vals[1][0] = encoding_factor * read_big_fixed(mtx_buf + 12); + a2b->matrix.vals[1][1] = encoding_factor * read_big_fixed(mtx_buf + 16); + a2b->matrix.vals[1][2] = encoding_factor * read_big_fixed(mtx_buf + 20); + a2b->matrix.vals[2][0] = encoding_factor * read_big_fixed(mtx_buf + 24); + a2b->matrix.vals[2][1] = encoding_factor * read_big_fixed(mtx_buf + 28); + a2b->matrix.vals[2][2] = encoding_factor * read_big_fixed(mtx_buf + 32); + a2b->matrix.vals[0][3] = encoding_factor * read_big_fixed(mtx_buf + 36); + a2b->matrix.vals[1][3] = encoding_factor * read_big_fixed(mtx_buf + 40); + a2b->matrix.vals[2][3] = encoding_factor * read_big_fixed(mtx_buf + 44); + } else { + if (0 != matrix_offset) { + return false; + } + a2b->matrix_channels = 0; + } + + // "A" curves and CLUT must be used together + if (0 != a_curve_offset) { + if (0 == clut_offset) { + return false; + } + if (!read_curves(tag->buf, tag->size, a_curve_offset, a2b->input_channels, + a2b->input_curves)) { + return false; + } + + if (tag->size < clut_offset + SAFE_FIXED_SIZE(CLUT_Layout)) { + return false; + } + const CLUT_Layout* clut = (const CLUT_Layout*)(tag->buf + clut_offset); + + if (clut->grid_byte_width[0] == 1) { + a2b->grid_8 = clut->variable; + a2b->grid_16 = nullptr; + } else if (clut->grid_byte_width[0] == 2) { + a2b->grid_8 = nullptr; + a2b->grid_16 = clut->variable; + } else { + return false; + } + + uint64_t grid_size = a2b->output_channels * clut->grid_byte_width[0]; // the payload + for (uint32_t i = 0; i < a2b->input_channels; ++i) { + a2b->grid_points[i] = clut->grid_points[i]; + // The grid only makes sense with at least two points along each axis + if (a2b->grid_points[i] < 2) { + return false; + } + grid_size *= a2b->grid_points[i]; + } + if (tag->size < clut_offset + SAFE_FIXED_SIZE(CLUT_Layout) + grid_size) { + return false; + } + } else { + if (0 != clut_offset) { + return false; + } + + // If there is no CLUT, the number of input and output channels must match + if (a2b->input_channels != a2b->output_channels) { + return false; + } + + // Zero out the number of input channels to signal that we're skipping this stage + a2b->input_channels = 0; + } + + return true; +} + +// Exactly the same as read_tag_mab(), except where there are comments. +// TODO: refactor the two to eliminate common code? +static bool read_tag_mba(const skcms_ICCTag* tag, skcms_B2A* b2a, bool pcs_is_xyz) { + if (tag->size < SAFE_SIZEOF(mAB_or_mBA_Layout)) { + return false; + } + + const mAB_or_mBA_Layout* mBATag = (const mAB_or_mBA_Layout*)tag->buf; + + b2a->input_channels = mBATag->input_channels[0]; + b2a->output_channels = mBATag->output_channels[0]; + + // Require exactly 3 inputs (XYZ) and 3 (RGB) or 4 (CMYK) outputs. + if (b2a->input_channels != ARRAY_COUNT(b2a->input_curves)) { + return false; + } + if (b2a->output_channels < 3 || b2a->output_channels > ARRAY_COUNT(b2a->output_curves)) { + return false; + } + + uint32_t b_curve_offset = read_big_u32(mBATag->b_curve_offset); + uint32_t matrix_offset = read_big_u32(mBATag->matrix_offset); + uint32_t m_curve_offset = read_big_u32(mBATag->m_curve_offset); + uint32_t clut_offset = read_big_u32(mBATag->clut_offset); + uint32_t a_curve_offset = read_big_u32(mBATag->a_curve_offset); + + if (0 == b_curve_offset) { + return false; + } + + // "B" curves are our inputs, not outputs. + if (!read_curves(tag->buf, tag->size, b_curve_offset, b2a->input_channels, + b2a->input_curves)) { + return false; + } + + if (0 != m_curve_offset) { + if (0 == matrix_offset) { + return false; + } + // Matrix channels is tied to input_channels (3), not output_channels. + b2a->matrix_channels = b2a->input_channels; + + if (!read_curves(tag->buf, tag->size, m_curve_offset, b2a->matrix_channels, + b2a->matrix_curves)) { + return false; + } + + if (tag->size < matrix_offset + 12 * SAFE_SIZEOF(uint32_t)) { + return false; + } + float encoding_factor = pcs_is_xyz ? (32768 / 65535.0f) : 1.0f; // TODO: understand + const uint8_t* mtx_buf = tag->buf + matrix_offset; + b2a->matrix.vals[0][0] = encoding_factor * read_big_fixed(mtx_buf + 0); + b2a->matrix.vals[0][1] = encoding_factor * read_big_fixed(mtx_buf + 4); + b2a->matrix.vals[0][2] = encoding_factor * read_big_fixed(mtx_buf + 8); + b2a->matrix.vals[1][0] = encoding_factor * read_big_fixed(mtx_buf + 12); + b2a->matrix.vals[1][1] = encoding_factor * read_big_fixed(mtx_buf + 16); + b2a->matrix.vals[1][2] = encoding_factor * read_big_fixed(mtx_buf + 20); + b2a->matrix.vals[2][0] = encoding_factor * read_big_fixed(mtx_buf + 24); + b2a->matrix.vals[2][1] = encoding_factor * read_big_fixed(mtx_buf + 28); + b2a->matrix.vals[2][2] = encoding_factor * read_big_fixed(mtx_buf + 32); + b2a->matrix.vals[0][3] = encoding_factor * read_big_fixed(mtx_buf + 36); + b2a->matrix.vals[1][3] = encoding_factor * read_big_fixed(mtx_buf + 40); + b2a->matrix.vals[2][3] = encoding_factor * read_big_fixed(mtx_buf + 44); + } else { + if (0 != matrix_offset) { + return false; + } + b2a->matrix_channels = 0; + } + + if (0 != a_curve_offset) { + if (0 == clut_offset) { + return false; + } + + // "A" curves are our output, not input. + if (!read_curves(tag->buf, tag->size, a_curve_offset, b2a->output_channels, + b2a->output_curves)) { + return false; + } + + if (tag->size < clut_offset + SAFE_FIXED_SIZE(CLUT_Layout)) { + return false; + } + const CLUT_Layout* clut = (const CLUT_Layout*)(tag->buf + clut_offset); + + if (clut->grid_byte_width[0] == 1) { + b2a->grid_8 = clut->variable; + b2a->grid_16 = nullptr; + } else if (clut->grid_byte_width[0] == 2) { + b2a->grid_8 = nullptr; + b2a->grid_16 = clut->variable; + } else { + return false; + } + + uint64_t grid_size = b2a->output_channels * clut->grid_byte_width[0]; + for (uint32_t i = 0; i < b2a->input_channels; ++i) { + b2a->grid_points[i] = clut->grid_points[i]; + if (b2a->grid_points[i] < 2) { + return false; + } + grid_size *= b2a->grid_points[i]; + } + if (tag->size < clut_offset + SAFE_FIXED_SIZE(CLUT_Layout) + grid_size) { + return false; + } + } else { + if (0 != clut_offset) { + return false; + } + + if (b2a->input_channels != b2a->output_channels) { + return false; + } + + // Zero out *output* channels to skip this stage. + b2a->output_channels = 0; + } + return true; +} + +// If you pass f, we'll fit a possibly-non-zero value for *f. +// If you pass nullptr, we'll assume you want *f to be treated as zero. +static int fit_linear(const skcms_Curve* curve, int N, float tol, + float* c, float* d, float* f = nullptr) { + assert(N > 1); + // We iteratively fit the first points to the TF's linear piece. + // We want the cx + f line to pass through the first and last points we fit exactly. + // + // As we walk along the points we find the minimum and maximum slope of the line before the + // error would exceed our tolerance. We stop when the range [slope_min, slope_max] becomes + // emtpy, when we definitely can't add any more points. + // + // Some points' error intervals may intersect the running interval but not lie fully + // within it. So we keep track of the last point we saw that is a valid end point candidate, + // and once the search is done, back up to build the line through *that* point. + const float dx = 1.0f / static_cast(N - 1); + + int lin_points = 1; + + float f_zero = 0.0f; + if (f) { + *f = eval_curve(curve, 0); + } else { + f = &f_zero; + } + + + float slope_min = -INFINITY_; + float slope_max = +INFINITY_; + for (int i = 1; i < N; ++i) { + float x = static_cast(i) * dx; + float y = eval_curve(curve, x); + + float slope_max_i = (y + tol - *f) / x, + slope_min_i = (y - tol - *f) / x; + if (slope_max_i < slope_min || slope_max < slope_min_i) { + // Slope intervals would no longer overlap. + break; + } + slope_max = fminf_(slope_max, slope_max_i); + slope_min = fmaxf_(slope_min, slope_min_i); + + float cur_slope = (y - *f) / x; + if (slope_min <= cur_slope && cur_slope <= slope_max) { + lin_points = i + 1; + *c = cur_slope; + } + } + + // Set D to the last point that met our tolerance. + *d = static_cast(lin_points - 1) * dx; + return lin_points; +} + +// If this skcms_Curve holds an identity table, rewrite it as an identity skcms_TransferFunction. +static void canonicalize_identity(skcms_Curve* curve) { + if (curve->table_entries && curve->table_entries <= (uint32_t)INT_MAX) { + int N = (int)curve->table_entries; + + float c = 0.0f, d = 0.0f, f = 0.0f; + if (N == fit_linear(curve, N, 1.0f/static_cast(2*N), &c,&d,&f) + && c == 1.0f + && f == 0.0f) { + curve->table_entries = 0; + curve->table_8 = nullptr; + curve->table_16 = nullptr; + curve->parametric = skcms_TransferFunction{1,1,0,0,0,0,0}; + } + } +} + +static bool read_a2b(const skcms_ICCTag* tag, skcms_A2B* a2b, bool pcs_is_xyz) { + bool ok = false; + if (tag->type == skcms_Signature_mft1) { ok = read_tag_mft1(tag, a2b); } + if (tag->type == skcms_Signature_mft2) { ok = read_tag_mft2(tag, a2b); } + if (tag->type == skcms_Signature_mAB ) { ok = read_tag_mab(tag, a2b, pcs_is_xyz); } + if (!ok) { + return false; + } + + if (a2b->input_channels > 0) { canonicalize_identity(a2b->input_curves + 0); } + if (a2b->input_channels > 1) { canonicalize_identity(a2b->input_curves + 1); } + if (a2b->input_channels > 2) { canonicalize_identity(a2b->input_curves + 2); } + if (a2b->input_channels > 3) { canonicalize_identity(a2b->input_curves + 3); } + + if (a2b->matrix_channels > 0) { canonicalize_identity(a2b->matrix_curves + 0); } + if (a2b->matrix_channels > 1) { canonicalize_identity(a2b->matrix_curves + 1); } + if (a2b->matrix_channels > 2) { canonicalize_identity(a2b->matrix_curves + 2); } + + if (a2b->output_channels > 0) { canonicalize_identity(a2b->output_curves + 0); } + if (a2b->output_channels > 1) { canonicalize_identity(a2b->output_curves + 1); } + if (a2b->output_channels > 2) { canonicalize_identity(a2b->output_curves + 2); } + + return true; +} + +static bool read_b2a(const skcms_ICCTag* tag, skcms_B2A* b2a, bool pcs_is_xyz) { + bool ok = false; + if (tag->type == skcms_Signature_mft1) { ok = read_tag_mft1(tag, b2a); } + if (tag->type == skcms_Signature_mft2) { ok = read_tag_mft2(tag, b2a); } + if (tag->type == skcms_Signature_mBA ) { ok = read_tag_mba(tag, b2a, pcs_is_xyz); } + if (!ok) { + return false; + } + + if (b2a->input_channels > 0) { canonicalize_identity(b2a->input_curves + 0); } + if (b2a->input_channels > 1) { canonicalize_identity(b2a->input_curves + 1); } + if (b2a->input_channels > 2) { canonicalize_identity(b2a->input_curves + 2); } + + if (b2a->matrix_channels > 0) { canonicalize_identity(b2a->matrix_curves + 0); } + if (b2a->matrix_channels > 1) { canonicalize_identity(b2a->matrix_curves + 1); } + if (b2a->matrix_channels > 2) { canonicalize_identity(b2a->matrix_curves + 2); } + + if (b2a->output_channels > 0) { canonicalize_identity(b2a->output_curves + 0); } + if (b2a->output_channels > 1) { canonicalize_identity(b2a->output_curves + 1); } + if (b2a->output_channels > 2) { canonicalize_identity(b2a->output_curves + 2); } + if (b2a->output_channels > 3) { canonicalize_identity(b2a->output_curves + 3); } + + return true; +} + +typedef struct { + uint8_t type [4]; + uint8_t reserved [4]; + uint8_t color_primaries [1]; + uint8_t transfer_characteristics [1]; + uint8_t matrix_coefficients [1]; + uint8_t video_full_range_flag [1]; +} CICP_Layout; + +static bool read_cicp(const skcms_ICCTag* tag, skcms_CICP* cicp) { + if (tag->type != skcms_Signature_CICP || tag->size < SAFE_SIZEOF(CICP_Layout)) { + return false; + } + + const CICP_Layout* cicpTag = (const CICP_Layout*)tag->buf; + + cicp->color_primaries = cicpTag->color_primaries[0]; + cicp->transfer_characteristics = cicpTag->transfer_characteristics[0]; + cicp->matrix_coefficients = cicpTag->matrix_coefficients[0]; + cicp->video_full_range_flag = cicpTag->video_full_range_flag[0]; + return true; +} + +void skcms_GetTagByIndex(const skcms_ICCProfile* profile, uint32_t idx, skcms_ICCTag* tag) { + if (!profile || !profile->buffer || !tag) { return; } + if (idx > profile->tag_count) { return; } + const tag_Layout* tags = get_tag_table(profile); + tag->signature = read_big_u32(tags[idx].signature); + tag->size = read_big_u32(tags[idx].size); + tag->buf = read_big_u32(tags[idx].offset) + profile->buffer; + tag->type = read_big_u32(tag->buf); +} + +bool skcms_GetTagBySignature(const skcms_ICCProfile* profile, uint32_t sig, skcms_ICCTag* tag) { + if (!profile || !profile->buffer || !tag) { return false; } + const tag_Layout* tags = get_tag_table(profile); + for (uint32_t i = 0; i < profile->tag_count; ++i) { + if (read_big_u32(tags[i].signature) == sig) { + tag->signature = sig; + tag->size = read_big_u32(tags[i].size); + tag->buf = read_big_u32(tags[i].offset) + profile->buffer; + tag->type = read_big_u32(tag->buf); + return true; + } + } + return false; +} + +static bool usable_as_src(const skcms_ICCProfile* profile) { + return profile->has_A2B + || (profile->has_trc && profile->has_toXYZD50); +} + +bool skcms_ParseWithA2BPriority(const void* buf, size_t len, + const int priority[], const int priorities, + skcms_ICCProfile* profile) { + assert(SAFE_SIZEOF(header_Layout) == 132); + + if (!profile) { + return false; + } + memset(profile, 0, SAFE_SIZEOF(*profile)); + + if (len < SAFE_SIZEOF(header_Layout)) { + return false; + } + + // Byte-swap all header fields + const header_Layout* header = (const header_Layout*)buf; + profile->buffer = (const uint8_t*)buf; + profile->size = read_big_u32(header->size); + uint32_t version = read_big_u32(header->version); + profile->data_color_space = read_big_u32(header->data_color_space); + profile->pcs = read_big_u32(header->pcs); + uint32_t signature = read_big_u32(header->signature); + float illuminant_X = read_big_fixed(header->illuminant_X); + float illuminant_Y = read_big_fixed(header->illuminant_Y); + float illuminant_Z = read_big_fixed(header->illuminant_Z); + profile->tag_count = read_big_u32(header->tag_count); + + // Validate signature, size (smaller than buffer, large enough to hold tag table), + // and major version + uint64_t tag_table_size = profile->tag_count * SAFE_SIZEOF(tag_Layout); + if (signature != skcms_Signature_acsp || + profile->size > len || + profile->size < SAFE_SIZEOF(header_Layout) + tag_table_size || + (version >> 24) > 4) { + return false; + } + + // Validate that illuminant is D50 white + if (fabsf_(illuminant_X - 0.9642f) > 0.0100f || + fabsf_(illuminant_Y - 1.0000f) > 0.0100f || + fabsf_(illuminant_Z - 0.8249f) > 0.0100f) { + return false; + } + + // Validate that all tag entries have sane offset + size + const tag_Layout* tags = get_tag_table(profile); + for (uint32_t i = 0; i < profile->tag_count; ++i) { + uint32_t tag_offset = read_big_u32(tags[i].offset); + uint32_t tag_size = read_big_u32(tags[i].size); + uint64_t tag_end = (uint64_t)tag_offset + (uint64_t)tag_size; + if (tag_size < 4 || tag_end > profile->size) { + return false; + } + } + + if (profile->pcs != skcms_Signature_XYZ && profile->pcs != skcms_Signature_Lab) { + return false; + } + + bool pcs_is_xyz = profile->pcs == skcms_Signature_XYZ; + + // Pre-parse commonly used tags. + skcms_ICCTag kTRC; + if (profile->data_color_space == skcms_Signature_Gray && + skcms_GetTagBySignature(profile, skcms_Signature_kTRC, &kTRC)) { + if (!read_curve(kTRC.buf, kTRC.size, &profile->trc[0], nullptr)) { + // Malformed tag + return false; + } + profile->trc[1] = profile->trc[0]; + profile->trc[2] = profile->trc[0]; + profile->has_trc = true; + + if (pcs_is_xyz) { + profile->toXYZD50.vals[0][0] = illuminant_X; + profile->toXYZD50.vals[1][1] = illuminant_Y; + profile->toXYZD50.vals[2][2] = illuminant_Z; + profile->has_toXYZD50 = true; + } + } else { + skcms_ICCTag rTRC, gTRC, bTRC; + if (skcms_GetTagBySignature(profile, skcms_Signature_rTRC, &rTRC) && + skcms_GetTagBySignature(profile, skcms_Signature_gTRC, &gTRC) && + skcms_GetTagBySignature(profile, skcms_Signature_bTRC, &bTRC)) { + if (!read_curve(rTRC.buf, rTRC.size, &profile->trc[0], nullptr) || + !read_curve(gTRC.buf, gTRC.size, &profile->trc[1], nullptr) || + !read_curve(bTRC.buf, bTRC.size, &profile->trc[2], nullptr)) { + // Malformed TRC tags + return false; + } + profile->has_trc = true; + } + + skcms_ICCTag rXYZ, gXYZ, bXYZ; + if (skcms_GetTagBySignature(profile, skcms_Signature_rXYZ, &rXYZ) && + skcms_GetTagBySignature(profile, skcms_Signature_gXYZ, &gXYZ) && + skcms_GetTagBySignature(profile, skcms_Signature_bXYZ, &bXYZ)) { + if (!read_to_XYZD50(&rXYZ, &gXYZ, &bXYZ, &profile->toXYZD50)) { + // Malformed XYZ tags + return false; + } + profile->has_toXYZD50 = true; + } + } + + for (int i = 0; i < priorities; i++) { + // enum { perceptual, relative_colormetric, saturation } + if (priority[i] < 0 || priority[i] > 2) { + return false; + } + uint32_t sig = skcms_Signature_A2B0 + static_cast(priority[i]); + skcms_ICCTag tag; + if (skcms_GetTagBySignature(profile, sig, &tag)) { + if (!read_a2b(&tag, &profile->A2B, pcs_is_xyz)) { + // Malformed A2B tag + return false; + } + profile->has_A2B = true; + break; + } + } + + for (int i = 0; i < priorities; i++) { + // enum { perceptual, relative_colormetric, saturation } + if (priority[i] < 0 || priority[i] > 2) { + return false; + } + uint32_t sig = skcms_Signature_B2A0 + static_cast(priority[i]); + skcms_ICCTag tag; + if (skcms_GetTagBySignature(profile, sig, &tag)) { + if (!read_b2a(&tag, &profile->B2A, pcs_is_xyz)) { + // Malformed B2A tag + return false; + } + profile->has_B2A = true; + break; + } + } + + skcms_ICCTag cicp_tag; + if (skcms_GetTagBySignature(profile, skcms_Signature_CICP, &cicp_tag)) { + if (!read_cicp(&cicp_tag, &profile->CICP)) { + // Malformed CICP tag + return false; + } + profile->has_CICP = true; + } + + return usable_as_src(profile); +} + + +const skcms_ICCProfile* skcms_sRGB_profile() { + static const skcms_ICCProfile sRGB_profile = { + nullptr, // buffer, moot here + + 0, // size, moot here + skcms_Signature_RGB, // data_color_space + skcms_Signature_XYZ, // pcs + 0, // tag count, moot here + + // We choose to represent sRGB with its canonical transfer function, + // and with its canonical XYZD50 gamut matrix. + true, // has_trc, followed by the 3 trc curves + { + {{0, {2.4f, (float)(1/1.055), (float)(0.055/1.055), (float)(1/12.92), 0.04045f, 0, 0}}}, + {{0, {2.4f, (float)(1/1.055), (float)(0.055/1.055), (float)(1/12.92), 0.04045f, 0, 0}}}, + {{0, {2.4f, (float)(1/1.055), (float)(0.055/1.055), (float)(1/12.92), 0.04045f, 0, 0}}}, + }, + + true, // has_toXYZD50, followed by 3x3 toXYZD50 matrix + {{ + { 0.436065674f, 0.385147095f, 0.143066406f }, + { 0.222488403f, 0.716873169f, 0.060607910f }, + { 0.013916016f, 0.097076416f, 0.714096069f }, + }}, + + false, // has_A2B, followed by A2B itself, which we don't care about. + { + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + {0,0,0,0}, + nullptr, + nullptr, + + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + {{ + { 0,0,0,0 }, + { 0,0,0,0 }, + { 0,0,0,0 }, + }}, + + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + }, + + false, // has_B2A, followed by B2A itself, which we also don't care about. + { + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + + 0, + {{ + { 0,0,0,0 }, + { 0,0,0,0 }, + { 0,0,0,0 }, + }}, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + + 0, + {0,0,0,0}, + nullptr, + nullptr, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + }, + + false, // has_CICP, followed by cicp itself which we don't care about. + { 0, 0, 0, 0 }, + }; + return &sRGB_profile; +} + +const skcms_ICCProfile* skcms_XYZD50_profile() { + // Just like sRGB above, but with identity transfer functions and toXYZD50 matrix. + static const skcms_ICCProfile XYZD50_profile = { + nullptr, // buffer, moot here + + 0, // size, moot here + skcms_Signature_RGB, // data_color_space + skcms_Signature_XYZ, // pcs + 0, // tag count, moot here + + true, // has_trc, followed by the 3 trc curves + { + {{0, {1,1, 0,0,0,0,0}}}, + {{0, {1,1, 0,0,0,0,0}}}, + {{0, {1,1, 0,0,0,0,0}}}, + }, + + true, // has_toXYZD50, followed by 3x3 toXYZD50 matrix + {{ + { 1,0,0 }, + { 0,1,0 }, + { 0,0,1 }, + }}, + + false, // has_A2B, followed by A2B itself, which we don't care about. + { + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + {0,0,0,0}, + nullptr, + nullptr, + + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + {{ + { 0,0,0,0 }, + { 0,0,0,0 }, + { 0,0,0,0 }, + }}, + + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + }, + + false, // has_B2A, followed by B2A itself, which we also don't care about. + { + 0, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + + 0, + {{ + { 0,0,0,0 }, + { 0,0,0,0 }, + { 0,0,0,0 }, + }}, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + + 0, + {0,0,0,0}, + nullptr, + nullptr, + { + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + {{0, {0,0, 0,0,0,0,0}}}, + }, + }, + + false, // has_CICP, followed by cicp itself which we don't care about. + { 0, 0, 0, 0 }, + }; + + return &XYZD50_profile; +} + +const skcms_TransferFunction* skcms_sRGB_TransferFunction() { + return &skcms_sRGB_profile()->trc[0].parametric; +} + +const skcms_TransferFunction* skcms_sRGB_Inverse_TransferFunction() { + static const skcms_TransferFunction sRGB_inv = + {0.416666657f, 1.137283325f, -0.0f, 12.920000076f, 0.003130805f, -0.054969788f, -0.0f}; + return &sRGB_inv; +} + +const skcms_TransferFunction* skcms_Identity_TransferFunction() { + static const skcms_TransferFunction identity = {1,1,0,0,0,0,0}; + return &identity; +} + +const uint8_t skcms_252_random_bytes[] = { + 8, 179, 128, 204, 253, 38, 134, 184, 68, 102, 32, 138, 99, 39, 169, 215, + 119, 26, 3, 223, 95, 239, 52, 132, 114, 74, 81, 234, 97, 116, 244, 205, 30, + 154, 173, 12, 51, 159, 122, 153, 61, 226, 236, 178, 229, 55, 181, 220, 191, + 194, 160, 126, 168, 82, 131, 18, 180, 245, 163, 22, 246, 69, 235, 252, 57, + 108, 14, 6, 152, 240, 255, 171, 242, 20, 227, 177, 238, 96, 85, 16, 211, + 70, 200, 149, 155, 146, 127, 145, 100, 151, 109, 19, 165, 208, 195, 164, + 137, 254, 182, 248, 64, 201, 45, 209, 5, 147, 207, 210, 113, 162, 83, 225, + 9, 31, 15, 231, 115, 37, 58, 53, 24, 49, 197, 56, 120, 172, 48, 21, 214, + 129, 111, 11, 50, 187, 196, 34, 60, 103, 71, 144, 47, 203, 77, 80, 232, + 140, 222, 250, 206, 166, 247, 139, 249, 221, 72, 106, 27, 199, 117, 54, + 219, 135, 118, 40, 79, 41, 251, 46, 93, 212, 92, 233, 148, 28, 121, 63, + 123, 158, 105, 59, 29, 42, 143, 23, 0, 107, 176, 87, 104, 183, 156, 193, + 189, 90, 188, 65, 190, 17, 198, 7, 186, 161, 1, 124, 78, 125, 170, 133, + 174, 218, 67, 157, 75, 101, 89, 217, 62, 33, 141, 228, 25, 35, 91, 230, 4, + 2, 13, 73, 86, 167, 237, 84, 243, 44, 185, 66, 130, 110, 150, 142, 216, 88, + 112, 36, 224, 136, 202, 76, 94, 98, 175, 213 +}; + +bool skcms_ApproximatelyEqualProfiles(const skcms_ICCProfile* A, const skcms_ICCProfile* B) { + // Test for exactly equal profiles first. + if (A == B || 0 == memcmp(A,B, sizeof(skcms_ICCProfile))) { + return true; + } + + // For now this is the essentially the same strategy we use in test_only.c + // for our skcms_Transform() smoke tests: + // 1) transform A to XYZD50 + // 2) transform B to XYZD50 + // 3) return true if they're similar enough + // Our current criterion in 3) is maximum 1 bit error per XYZD50 byte. + + // skcms_252_random_bytes are 252 of a random shuffle of all possible bytes. + // 252 is evenly divisible by 3 and 4. Only 192, 10, 241, and 43 are missing. + + // We want to allow otherwise equivalent profiles tagged as grayscale and RGB + // to be treated as equal. But CMYK profiles are a totally different ballgame. + const auto CMYK = skcms_Signature_CMYK; + if ((A->data_color_space == CMYK) != (B->data_color_space == CMYK)) { + return false; + } + + // Interpret as RGB_888 if data color space is RGB or GRAY, RGBA_8888 if CMYK. + // TODO: working with RGBA_8888 either way is probably fastest. + skcms_PixelFormat fmt = skcms_PixelFormat_RGB_888; + size_t npixels = 84; + if (A->data_color_space == skcms_Signature_CMYK) { + fmt = skcms_PixelFormat_RGBA_8888; + npixels = 63; + } + + // TODO: if A or B is a known profile (skcms_sRGB_profile, skcms_XYZD50_profile), + // use pre-canned results and skip that skcms_Transform() call? + uint8_t dstA[252], + dstB[252]; + if (!skcms_Transform( + skcms_252_random_bytes, fmt, skcms_AlphaFormat_Unpremul, A, + dstA, skcms_PixelFormat_RGB_888, skcms_AlphaFormat_Unpremul, skcms_XYZD50_profile(), + npixels)) { + return false; + } + if (!skcms_Transform( + skcms_252_random_bytes, fmt, skcms_AlphaFormat_Unpremul, B, + dstB, skcms_PixelFormat_RGB_888, skcms_AlphaFormat_Unpremul, skcms_XYZD50_profile(), + npixels)) { + return false; + } + + // TODO: make sure this final check has reasonable codegen. + for (size_t i = 0; i < 252; i++) { + if (abs((int)dstA[i] - (int)dstB[i]) > 1) { + return false; + } + } + return true; +} + +bool skcms_TRCs_AreApproximateInverse(const skcms_ICCProfile* profile, + const skcms_TransferFunction* inv_tf) { + if (!profile || !profile->has_trc) { + return false; + } + + return skcms_AreApproximateInverses(&profile->trc[0], inv_tf) && + skcms_AreApproximateInverses(&profile->trc[1], inv_tf) && + skcms_AreApproximateInverses(&profile->trc[2], inv_tf); +} + +static bool is_zero_to_one(float x) { + return 0 <= x && x <= 1; +} + +typedef struct { float vals[3]; } skcms_Vector3; + +static skcms_Vector3 mv_mul(const skcms_Matrix3x3* m, const skcms_Vector3* v) { + skcms_Vector3 dst = {{0,0,0}}; + for (int row = 0; row < 3; ++row) { + dst.vals[row] = m->vals[row][0] * v->vals[0] + + m->vals[row][1] * v->vals[1] + + m->vals[row][2] * v->vals[2]; + } + return dst; +} + +bool skcms_AdaptToXYZD50(float wx, float wy, + skcms_Matrix3x3* toXYZD50) { + if (!is_zero_to_one(wx) || !is_zero_to_one(wy) || + !toXYZD50) { + return false; + } + + // Assumes that Y is 1.0f. + skcms_Vector3 wXYZ = { { wx / wy, 1, (1 - wx - wy) / wy } }; + + // Now convert toXYZ matrix to toXYZD50. + skcms_Vector3 wXYZD50 = { { 0.96422f, 1.0f, 0.82521f } }; + + // Calculate the chromatic adaptation matrix. We will use the Bradford method, thus + // the matrices below. The Bradford method is used by Adobe and is widely considered + // to be the best. + skcms_Matrix3x3 xyz_to_lms = {{ + { 0.8951f, 0.2664f, -0.1614f }, + { -0.7502f, 1.7135f, 0.0367f }, + { 0.0389f, -0.0685f, 1.0296f }, + }}; + skcms_Matrix3x3 lms_to_xyz = {{ + { 0.9869929f, -0.1470543f, 0.1599627f }, + { 0.4323053f, 0.5183603f, 0.0492912f }, + { -0.0085287f, 0.0400428f, 0.9684867f }, + }}; + + skcms_Vector3 srcCone = mv_mul(&xyz_to_lms, &wXYZ); + skcms_Vector3 dstCone = mv_mul(&xyz_to_lms, &wXYZD50); + + *toXYZD50 = {{ + { dstCone.vals[0] / srcCone.vals[0], 0, 0 }, + { 0, dstCone.vals[1] / srcCone.vals[1], 0 }, + { 0, 0, dstCone.vals[2] / srcCone.vals[2] }, + }}; + *toXYZD50 = skcms_Matrix3x3_concat(toXYZD50, &xyz_to_lms); + *toXYZD50 = skcms_Matrix3x3_concat(&lms_to_xyz, toXYZD50); + + return true; +} + +bool skcms_PrimariesToXYZD50(float rx, float ry, + float gx, float gy, + float bx, float by, + float wx, float wy, + skcms_Matrix3x3* toXYZD50) { + if (!is_zero_to_one(rx) || !is_zero_to_one(ry) || + !is_zero_to_one(gx) || !is_zero_to_one(gy) || + !is_zero_to_one(bx) || !is_zero_to_one(by) || + !is_zero_to_one(wx) || !is_zero_to_one(wy) || + !toXYZD50) { + return false; + } + + // First, we need to convert xy values (primaries) to XYZ. + skcms_Matrix3x3 primaries = {{ + { rx, gx, bx }, + { ry, gy, by }, + { 1 - rx - ry, 1 - gx - gy, 1 - bx - by }, + }}; + skcms_Matrix3x3 primaries_inv; + if (!skcms_Matrix3x3_invert(&primaries, &primaries_inv)) { + return false; + } + + // Assumes that Y is 1.0f. + skcms_Vector3 wXYZ = { { wx / wy, 1, (1 - wx - wy) / wy } }; + skcms_Vector3 XYZ = mv_mul(&primaries_inv, &wXYZ); + + skcms_Matrix3x3 toXYZ = {{ + { XYZ.vals[0], 0, 0 }, + { 0, XYZ.vals[1], 0 }, + { 0, 0, XYZ.vals[2] }, + }}; + toXYZ = skcms_Matrix3x3_concat(&primaries, &toXYZ); + + skcms_Matrix3x3 DXtoD50; + if (!skcms_AdaptToXYZD50(wx, wy, &DXtoD50)) { + return false; + } + + *toXYZD50 = skcms_Matrix3x3_concat(&DXtoD50, &toXYZ); + return true; +} + + +bool skcms_Matrix3x3_invert(const skcms_Matrix3x3* src, skcms_Matrix3x3* dst) { + double a00 = src->vals[0][0], + a01 = src->vals[1][0], + a02 = src->vals[2][0], + a10 = src->vals[0][1], + a11 = src->vals[1][1], + a12 = src->vals[2][1], + a20 = src->vals[0][2], + a21 = src->vals[1][2], + a22 = src->vals[2][2]; + + double b0 = a00*a11 - a01*a10, + b1 = a00*a12 - a02*a10, + b2 = a01*a12 - a02*a11, + b3 = a20, + b4 = a21, + b5 = a22; + + double determinant = b0*b5 + - b1*b4 + + b2*b3; + + if (determinant == 0) { + return false; + } + + double invdet = 1.0 / determinant; + if (invdet > +FLT_MAX || invdet < -FLT_MAX || !isfinitef_((float)invdet)) { + return false; + } + + b0 *= invdet; + b1 *= invdet; + b2 *= invdet; + b3 *= invdet; + b4 *= invdet; + b5 *= invdet; + + dst->vals[0][0] = (float)( a11*b5 - a12*b4 ); + dst->vals[1][0] = (float)( a02*b4 - a01*b5 ); + dst->vals[2][0] = (float)( + b2 ); + dst->vals[0][1] = (float)( a12*b3 - a10*b5 ); + dst->vals[1][1] = (float)( a00*b5 - a02*b3 ); + dst->vals[2][1] = (float)( - b1 ); + dst->vals[0][2] = (float)( a10*b4 - a11*b3 ); + dst->vals[1][2] = (float)( a01*b3 - a00*b4 ); + dst->vals[2][2] = (float)( + b0 ); + + for (int r = 0; r < 3; ++r) + for (int c = 0; c < 3; ++c) { + if (!isfinitef_(dst->vals[r][c])) { + return false; + } + } + return true; +} + +skcms_Matrix3x3 skcms_Matrix3x3_concat(const skcms_Matrix3x3* A, const skcms_Matrix3x3* B) { + skcms_Matrix3x3 m = { { { 0,0,0 },{ 0,0,0 },{ 0,0,0 } } }; + for (int r = 0; r < 3; r++) + for (int c = 0; c < 3; c++) { + m.vals[r][c] = A->vals[r][0] * B->vals[0][c] + + A->vals[r][1] * B->vals[1][c] + + A->vals[r][2] * B->vals[2][c]; + } + return m; +} + +#if defined(__clang__) + [[clang::no_sanitize("float-divide-by-zero")]] // Checked for by classify() on the way out. +#endif +bool skcms_TransferFunction_invert(const skcms_TransferFunction* src, skcms_TransferFunction* dst) { + TF_PQish pq; + TF_HLGish hlg; + switch (classify(*src, &pq, &hlg)) { + case skcms_TFType_Invalid: return false; + case skcms_TFType_sRGBish: break; // handled below + + case skcms_TFType_PQish: + *dst = { TFKind_marker(skcms_TFType_PQish), -pq.A, pq.D, 1.0f/pq.F + , pq.B, -pq.E, 1.0f/pq.C}; + return true; + + case skcms_TFType_HLGish: + *dst = { TFKind_marker(skcms_TFType_HLGinvish), 1.0f/hlg.R, 1.0f/hlg.G + , 1.0f/hlg.a, hlg.b, hlg.c + , hlg.K_minus_1 }; + return true; + + case skcms_TFType_HLGinvish: + *dst = { TFKind_marker(skcms_TFType_HLGish), 1.0f/hlg.R, 1.0f/hlg.G + , 1.0f/hlg.a, hlg.b, hlg.c + , hlg.K_minus_1 }; + return true; + } + + assert (classify(*src) == skcms_TFType_sRGBish); + + // We're inverting this function, solving for x in terms of y. + // y = (cx + f) x < d + // (ax + b)^g + e x ≥ d + // The inverse of this function can be expressed in the same piecewise form. + skcms_TransferFunction inv = {0,0,0,0,0,0,0}; + + // We'll start by finding the new threshold inv.d. + // In principle we should be able to find that by solving for y at x=d from either side. + // (If those two d values aren't the same, it's a discontinuous transfer function.) + float d_l = src->c * src->d + src->f, + d_r = powf_(src->a * src->d + src->b, src->g) + src->e; + if (fabsf_(d_l - d_r) > 1/512.0f) { + return false; + } + inv.d = d_l; // TODO(mtklein): better in practice to choose d_r? + + // When d=0, the linear section collapses to a point. We leave c,d,f all zero in that case. + if (inv.d > 0) { + // Inverting the linear section is pretty straightfoward: + // y = cx + f + // y - f = cx + // (1/c)y - f/c = x + inv.c = 1.0f/src->c; + inv.f = -src->f/src->c; + } + + // The interesting part is inverting the nonlinear section: + // y = (ax + b)^g + e. + // y - e = (ax + b)^g + // (y - e)^1/g = ax + b + // (y - e)^1/g - b = ax + // (1/a)(y - e)^1/g - b/a = x + // + // To make that fit our form, we need to move the (1/a) term inside the exponentiation: + // let k = (1/a)^g + // (1/a)( y - e)^1/g - b/a = x + // (ky - ke)^1/g - b/a = x + + float k = powf_(src->a, -src->g); // (1/a)^g == a^-g + inv.g = 1.0f / src->g; + inv.a = k; + inv.b = -k * src->e; + inv.e = -src->b / src->a; + + // We need to enforce the same constraints here that we do when fitting a curve, + // a >= 0 and ad+b >= 0. These constraints are checked by classify(), so they're true + // of the source function if we're here. + + // Just like when fitting the curve, there's really no way to rescue a < 0. + if (inv.a < 0) { + return false; + } + // On the other hand we can rescue an ad+b that's gone slightly negative here. + if (inv.a * inv.d + inv.b < 0) { + inv.b = -inv.a * inv.d; + } + + // That should usually make classify(inv) == sRGBish true, but there are a couple situations + // where we might still fail here, like non-finite parameter values. + if (classify(inv) != skcms_TFType_sRGBish) { + return false; + } + + assert (inv.a >= 0); + assert (inv.a * inv.d + inv.b >= 0); + + // Now in principle we're done. + // But to preserve the valuable invariant inv(src(1.0f)) == 1.0f, we'll tweak + // e or f of the inverse, depending on which segment contains src(1.0f). + float s = skcms_TransferFunction_eval(src, 1.0f); + if (!isfinitef_(s)) { + return false; + } + + float sign = s < 0 ? -1.0f : 1.0f; + s *= sign; + if (s < inv.d) { + inv.f = 1.0f - sign * inv.c * s; + } else { + inv.e = 1.0f - sign * powf_(inv.a * s + inv.b, inv.g); + } + + *dst = inv; + return classify(*dst) == skcms_TFType_sRGBish; +} + +// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ // + +// From here below we're approximating an skcms_Curve with an skcms_TransferFunction{g,a,b,c,d,e,f}: +// +// tf(x) = cx + f x < d +// tf(x) = (ax + b)^g + e x ≥ d +// +// When fitting, we add the additional constraint that both pieces meet at d: +// +// cd + f = (ad + b)^g + e +// +// Solving for e and folding it through gives an alternate formulation of the non-linear piece: +// +// tf(x) = cx + f x < d +// tf(x) = (ax + b)^g - (ad + b)^g + cd + f x ≥ d +// +// Our overall strategy is then: +// For a couple tolerances, +// - fit_linear(): fit c,d,f iteratively to as many points as our tolerance allows +// - invert c,d,f +// - fit_nonlinear(): fit g,a,b using Gauss-Newton given those inverted c,d,f +// (and by constraint, inverted e) to the inverse of the table. +// Return the parameters with least maximum error. +// +// To run Gauss-Newton to find g,a,b, we'll also need the gradient of the residuals +// of round-trip f_inv(x), the inverse of the non-linear piece of f(x). +// +// let y = Table(x) +// r(x) = x - f_inv(y) +// +// ∂r/∂g = ln(ay + b)*(ay + b)^g +// - ln(ad + b)*(ad + b)^g +// ∂r/∂a = yg(ay + b)^(g-1) +// - dg(ad + b)^(g-1) +// ∂r/∂b = g(ay + b)^(g-1) +// - g(ad + b)^(g-1) + +// Return the residual of roundtripping skcms_Curve(x) through f_inv(y) with parameters P, +// and fill out the gradient of the residual into dfdP. +static float rg_nonlinear(float x, + const skcms_Curve* curve, + const skcms_TransferFunction* tf, + float dfdP[3]) { + const float y = eval_curve(curve, x); + + const float g = tf->g, a = tf->a, b = tf->b, + c = tf->c, d = tf->d, f = tf->f; + + const float Y = fmaxf_(a*y + b, 0.0f), + D = a*d + b; + assert (D >= 0); + + // The gradient. + dfdP[0] = logf_(Y)*powf_(Y, g) + - logf_(D)*powf_(D, g); + dfdP[1] = y*g*powf_(Y, g-1) + - d*g*powf_(D, g-1); + dfdP[2] = g*powf_(Y, g-1) + - g*powf_(D, g-1); + + // The residual. + const float f_inv = powf_(Y, g) + - powf_(D, g) + + c*d + f; + return x - f_inv; +} + +static bool gauss_newton_step(const skcms_Curve* curve, + skcms_TransferFunction* tf, + float x0, float dx, int N) { + // We'll sample x from the range [x0,x1] (both inclusive) N times with even spacing. + // + // Let P = [ tf->g, tf->a, tf->b ] (the three terms that we're adjusting). + // + // We want to do P' = P + (Jf^T Jf)^-1 Jf^T r(P), + // where r(P) is the residual vector + // and Jf is the Jacobian matrix of f(), ∂r/∂P. + // + // Let's review the shape of each of these expressions: + // r(P) is [N x 1], a column vector with one entry per value of x tested + // Jf is [N x 3], a matrix with an entry for each (x,P) pair + // Jf^T is [3 x N], the transpose of Jf + // + // Jf^T Jf is [3 x N] * [N x 3] == [3 x 3], a 3x3 matrix, + // and so is its inverse (Jf^T Jf)^-1 + // Jf^T r(P) is [3 x N] * [N x 1] == [3 x 1], a column vector with the same shape as P + // + // Our implementation strategy to get to the final ∆P is + // 1) evaluate Jf^T Jf, call that lhs + // 2) evaluate Jf^T r(P), call that rhs + // 3) invert lhs + // 4) multiply inverse lhs by rhs + // + // This is a friendly implementation strategy because we don't have to have any + // buffers that scale with N, and equally nice don't have to perform any matrix + // operations that are variable size. + // + // Other implementation strategies could trade this off, e.g. evaluating the + // pseudoinverse of Jf ( (Jf^T Jf)^-1 Jf^T ) directly, then multiplying that by + // the residuals. That would probably require implementing singular value + // decomposition, and would create a [3 x N] matrix to be multiplied by the + // [N x 1] residual vector, but on the upside I think that'd eliminate the + // possibility of this gauss_newton_step() function ever failing. + + // 0) start off with lhs and rhs safely zeroed. + skcms_Matrix3x3 lhs = {{ {0,0,0}, {0,0,0}, {0,0,0} }}; + skcms_Vector3 rhs = { {0,0,0} }; + + // 1,2) evaluate lhs and evaluate rhs + // We want to evaluate Jf only once, but both lhs and rhs involve Jf^T, + // so we'll have to update lhs and rhs at the same time. + for (int i = 0; i < N; i++) { + float x = x0 + static_cast(i)*dx; + + float dfdP[3] = {0,0,0}; + float resid = rg_nonlinear(x,curve,tf, dfdP); + + for (int r = 0; r < 3; r++) { + for (int c = 0; c < 3; c++) { + lhs.vals[r][c] += dfdP[r] * dfdP[c]; + } + rhs.vals[r] += dfdP[r] * resid; + } + } + + // If any of the 3 P parameters are unused, this matrix will be singular. + // Detect those cases and fix them up to indentity instead, so we can invert. + for (int k = 0; k < 3; k++) { + if (lhs.vals[0][k]==0 && lhs.vals[1][k]==0 && lhs.vals[2][k]==0 && + lhs.vals[k][0]==0 && lhs.vals[k][1]==0 && lhs.vals[k][2]==0) { + lhs.vals[k][k] = 1; + } + } + + // 3) invert lhs + skcms_Matrix3x3 lhs_inv; + if (!skcms_Matrix3x3_invert(&lhs, &lhs_inv)) { + return false; + } + + // 4) multiply inverse lhs by rhs + skcms_Vector3 dP = mv_mul(&lhs_inv, &rhs); + tf->g += dP.vals[0]; + tf->a += dP.vals[1]; + tf->b += dP.vals[2]; + return isfinitef_(tf->g) && isfinitef_(tf->a) && isfinitef_(tf->b); +} + +static float max_roundtrip_error_checked(const skcms_Curve* curve, + const skcms_TransferFunction* tf_inv) { + skcms_TransferFunction tf; + if (!skcms_TransferFunction_invert(tf_inv, &tf) || skcms_TFType_sRGBish != classify(tf)) { + return INFINITY_; + } + + skcms_TransferFunction tf_inv_again; + if (!skcms_TransferFunction_invert(&tf, &tf_inv_again)) { + return INFINITY_; + } + + return skcms_MaxRoundtripError(curve, &tf_inv_again); +} + +// Fit the points in [L,N) to the non-linear piece of tf, or return false if we can't. +static bool fit_nonlinear(const skcms_Curve* curve, int L, int N, skcms_TransferFunction* tf) { + // This enforces a few constraints that are not modeled in gauss_newton_step()'s optimization. + auto fixup_tf = [tf]() { + // a must be non-negative. That ensures the function is monotonically increasing. + // We don't really know how to fix up a if it goes negative. + if (tf->a < 0) { + return false; + } + // ad+b must be non-negative. That ensures we don't end up with complex numbers in powf. + // We feel just barely not uneasy enough to tweak b so ad+b is zero in this case. + if (tf->a * tf->d + tf->b < 0) { + tf->b = -tf->a * tf->d; + } + assert (tf->a >= 0 && + tf->a * tf->d + tf->b >= 0); + + // cd+f must be ~= (ad+b)^g+e. That ensures the function is continuous. We keep e as a free + // parameter so we can guarantee this. + tf->e = tf->c*tf->d + tf->f + - powf_(tf->a*tf->d + tf->b, tf->g); + + return true; + }; + + if (!fixup_tf()) { + return false; + } + + // No matter where we start, dx should always represent N even steps from 0 to 1. + const float dx = 1.0f / static_cast(N-1); + + skcms_TransferFunction best_tf = *tf; + float best_max_error = INFINITY_; + + // Need this or several curves get worse... *sigh* + float init_error = max_roundtrip_error_checked(curve, tf); + if (init_error < best_max_error) { + best_max_error = init_error; + best_tf = *tf; + } + + // As far as we can tell, 1 Gauss-Newton step won't converge, and 3 steps is no better than 2. + for (int j = 0; j < 8; j++) { + if (!gauss_newton_step(curve, tf, static_cast(L)*dx, dx, N-L) || !fixup_tf()) { + *tf = best_tf; + return isfinitef_(best_max_error); + } + + float max_error = max_roundtrip_error_checked(curve, tf); + if (max_error < best_max_error) { + best_max_error = max_error; + best_tf = *tf; + } + } + + *tf = best_tf; + return isfinitef_(best_max_error); +} + +bool skcms_ApproximateCurve(const skcms_Curve* curve, + skcms_TransferFunction* approx, + float* max_error) { + if (!curve || !approx || !max_error) { + return false; + } + + if (curve->table_entries == 0) { + // No point approximating an skcms_TransferFunction with an skcms_TransferFunction! + return false; + } + + if (curve->table_entries == 1 || curve->table_entries > (uint32_t)INT_MAX) { + // We need at least two points, and must put some reasonable cap on the maximum number. + return false; + } + + int N = (int)curve->table_entries; + const float dx = 1.0f / static_cast(N - 1); + + *max_error = INFINITY_; + const float kTolerances[] = { 1.5f / 65535.0f, 1.0f / 512.0f }; + for (int t = 0; t < ARRAY_COUNT(kTolerances); t++) { + skcms_TransferFunction tf, + tf_inv; + + // It's problematic to fit curves with non-zero f, so always force it to zero explicitly. + tf.f = 0.0f; + int L = fit_linear(curve, N, kTolerances[t], &tf.c, &tf.d); + + if (L == N) { + // If the entire data set was linear, move the coefficients to the nonlinear portion + // with G == 1. This lets use a canonical representation with d == 0. + tf.g = 1; + tf.a = tf.c; + tf.b = tf.f; + tf.c = tf.d = tf.e = tf.f = 0; + } else if (L == N - 1) { + // Degenerate case with only two points in the nonlinear segment. Solve directly. + tf.g = 1; + tf.a = (eval_curve(curve, static_cast(N-1)*dx) - + eval_curve(curve, static_cast(N-2)*dx)) + / dx; + tf.b = eval_curve(curve, static_cast(N-2)*dx) + - tf.a * static_cast(N-2)*dx; + tf.e = 0; + } else { + // Start by guessing a gamma-only curve through the midpoint. + int mid = (L + N) / 2; + float mid_x = static_cast(mid) / static_cast(N - 1); + float mid_y = eval_curve(curve, mid_x); + tf.g = log2f_(mid_y) / log2f_(mid_x); + tf.a = 1; + tf.b = 0; + tf.e = tf.c*tf.d + tf.f + - powf_(tf.a*tf.d + tf.b, tf.g); + + + if (!skcms_TransferFunction_invert(&tf, &tf_inv) || + !fit_nonlinear(curve, L,N, &tf_inv)) { + continue; + } + + // We fit tf_inv, so calculate tf to keep in sync. + // fit_nonlinear() should guarantee invertibility. + if (!skcms_TransferFunction_invert(&tf_inv, &tf)) { + assert(false); + continue; + } + } + + // We'd better have a sane, sRGB-ish TF by now. + // Other non-Bad TFs would be fine, but we know we've only ever tried to fit sRGBish; + // anything else is just some accident of math and the way we pun tf.g as a type flag. + // fit_nonlinear() should guarantee this, but the special cases may fail this test. + if (skcms_TFType_sRGBish != classify(tf)) { + continue; + } + + // We find our error by roundtripping the table through tf_inv. + // + // (The most likely use case for this approximation is to be inverted and + // used as the transfer function for a destination color space.) + // + // We've kept tf and tf_inv in sync above, but we can't guarantee that tf is + // invertible, so re-verify that here (and use the new inverse for testing). + // fit_nonlinear() should guarantee this, but the special cases that don't use + // it may fail this test. + if (!skcms_TransferFunction_invert(&tf, &tf_inv)) { + continue; + } + + float err = skcms_MaxRoundtripError(curve, &tf_inv); + if (*max_error > err) { + *max_error = err; + *approx = tf; + } + } + return isfinitef_(*max_error); +} + +// ~~~~ Impl. of skcms_Transform() ~~~~ + +typedef enum { + Op_load_a8, + Op_load_g8, + Op_load_8888_palette8, + Op_load_4444, + Op_load_565, + Op_load_888, + Op_load_8888, + Op_load_1010102, + Op_load_101010x_XR, + Op_load_161616LE, + Op_load_16161616LE, + Op_load_161616BE, + Op_load_16161616BE, + Op_load_hhh, + Op_load_hhhh, + Op_load_fff, + Op_load_ffff, + + Op_swap_rb, + Op_clamp, + Op_invert, + Op_force_opaque, + Op_premul, + Op_unpremul, + Op_matrix_3x3, + Op_matrix_3x4, + + Op_lab_to_xyz, + Op_xyz_to_lab, + + Op_tf_r, + Op_tf_g, + Op_tf_b, + Op_tf_a, + + Op_pq_r, + Op_pq_g, + Op_pq_b, + Op_pq_a, + + Op_hlg_r, + Op_hlg_g, + Op_hlg_b, + Op_hlg_a, + + Op_hlginv_r, + Op_hlginv_g, + Op_hlginv_b, + Op_hlginv_a, + + Op_table_r, + Op_table_g, + Op_table_b, + Op_table_a, + + Op_clut_A2B, + Op_clut_B2A, + + Op_store_a8, + Op_store_g8, + Op_store_4444, + Op_store_565, + Op_store_888, + Op_store_8888, + Op_store_1010102, + Op_store_161616LE, + Op_store_16161616LE, + Op_store_161616BE, + Op_store_16161616BE, + Op_store_101010x_XR, + Op_store_hhh, + Op_store_hhhh, + Op_store_fff, + Op_store_ffff, +} Op; + +#if defined(__clang__) + template using Vec = T __attribute__((ext_vector_type(N))); +#elif defined(__GNUC__) + // For some reason GCC accepts this nonsense, but not the more straightforward version, + // template using Vec = T __attribute__((vector_size(N*sizeof(T)))); + template + struct VecHelper { typedef T __attribute__((vector_size(N*sizeof(T)))) V; }; + + template using Vec = typename VecHelper::V; +#endif + +// First, instantiate our default exec_ops() implementation using the default compiliation target. + +namespace baseline { +#if defined(SKCMS_PORTABLE) || !(defined(__clang__) || defined(__GNUC__)) \ + || (defined(__EMSCRIPTEN_major__) && !defined(__wasm_simd128__)) + #define N 1 + template using V = T; + using Color = float; +#elif defined(__AVX512F__) && defined(__AVX512DQ__) + #define N 16 + template using V = Vec; + using Color = float; +#elif defined(__AVX__) + #define N 8 + template using V = Vec; + using Color = float; +#elif defined(__ARM_FEATURE_FP16_VECTOR_ARITHMETIC) && defined(SKCMS_OPT_INTO_NEON_FP16) + #define N 8 + template using V = Vec; + using Color = _Float16; +#else + #define N 4 + template using V = Vec; + using Color = float; +#endif + + #include "src/Transform_inl.h" + #undef N +} + +// Now, instantiate any other versions of run_program() we may want for runtime detection. +#if !defined(SKCMS_PORTABLE) && \ + !defined(SKCMS_NO_RUNTIME_CPU_DETECTION) && \ + (( defined(__clang__) && __clang_major__ >= 5) || \ + (!defined(__clang__) && defined(__GNUC__))) \ + && defined(__x86_64__) + + #if !defined(__AVX2__) + #if defined(__clang__) + #pragma clang attribute push(__attribute__((target("avx2,f16c"))), apply_to=function) + #elif defined(__GNUC__) + #pragma GCC push_options + #pragma GCC target("avx2,f16c") + #endif + + namespace hsw { + #define USING_AVX + #define USING_AVX_F16C + #define USING_AVX2 + #define N 8 + template using V = Vec; + using Color = float; + + #include "src/Transform_inl.h" + + // src/Transform_inl.h will undefine USING_* for us. + #undef N + } + + #if defined(__clang__) + #pragma clang attribute pop + #elif defined(__GNUC__) + #pragma GCC pop_options + #endif + + #define TEST_FOR_HSW + #endif + + #if !defined(__AVX512F__) || !defined(__AVX512DQ__) + #if defined(__clang__) + #pragma clang attribute push(__attribute__((target("avx512f,avx512dq,avx512cd,avx512bw,avx512vl"))), apply_to=function) + #elif defined(__GNUC__) + #pragma GCC push_options + #pragma GCC target("avx512f,avx512dq,avx512cd,avx512bw,avx512vl") + #endif + + namespace skx { + #define USING_AVX512F + #define N 16 + template using V = Vec; + using Color = float; + + #include "src/Transform_inl.h" + + // src/Transform_inl.h will undefine USING_* for us. + #undef N + } + + #if defined(__clang__) + #pragma clang attribute pop + #elif defined(__GNUC__) + #pragma GCC pop_options + #endif + + #define TEST_FOR_SKX + #endif + + #if defined(TEST_FOR_HSW) || defined(TEST_FOR_SKX) + enum class CpuType { None, HSW, SKX }; + static CpuType cpu_type() { + static const CpuType type = []{ + if (!runtime_cpu_detection) { + return CpuType::None; + } + // See http://www.sandpile.org/x86/cpuid.htm + + // First, a basic cpuid(1) lets us check prerequisites for HSW, SKX. + uint32_t eax, ebx, ecx, edx; + __asm__ __volatile__("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) + : "0"(1), "2"(0)); + if ((edx & (1u<<25)) && // SSE + (edx & (1u<<26)) && // SSE2 + (ecx & (1u<< 0)) && // SSE3 + (ecx & (1u<< 9)) && // SSSE3 + (ecx & (1u<<12)) && // FMA (N.B. not used, avoided even) + (ecx & (1u<<19)) && // SSE4.1 + (ecx & (1u<<20)) && // SSE4.2 + (ecx & (1u<<26)) && // XSAVE + (ecx & (1u<<27)) && // OSXSAVE + (ecx & (1u<<28)) && // AVX + (ecx & (1u<<29))) { // F16C + + // Call cpuid(7) to check for AVX2 and AVX-512 bits. + __asm__ __volatile__("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) + : "0"(7), "2"(0)); + // eax from xgetbv(0) will tell us whether XMM, YMM, and ZMM state is saved. + uint32_t xcr0, dont_need_edx; + __asm__ __volatile__("xgetbv" : "=a"(xcr0), "=d"(dont_need_edx) : "c"(0)); + + if ((xcr0 & (1u<<1)) && // XMM register state saved? + (xcr0 & (1u<<2)) && // YMM register state saved? + (ebx & (1u<<5))) { // AVX2 + // At this point we're at least HSW. Continue checking for SKX. + if ((xcr0 & (1u<< 5)) && // Opmasks state saved? + (xcr0 & (1u<< 6)) && // First 16 ZMM registers saved? + (xcr0 & (1u<< 7)) && // High 16 ZMM registers saved? + (ebx & (1u<<16)) && // AVX512F + (ebx & (1u<<17)) && // AVX512DQ + (ebx & (1u<<28)) && // AVX512CD + (ebx & (1u<<30)) && // AVX512BW + (ebx & (1u<<31))) { // AVX512VL + return CpuType::SKX; + } + return CpuType::HSW; + } + } + return CpuType::None; + }(); + return type; + } + #endif + +#endif + +typedef struct { + Op op; + const void* arg; +} OpAndArg; + +static OpAndArg select_curve_op(const skcms_Curve* curve, int channel) { + static const struct { Op sRGBish, PQish, HLGish, HLGinvish, table; } ops[] = { + { Op_tf_r, Op_pq_r, Op_hlg_r, Op_hlginv_r, Op_table_r }, + { Op_tf_g, Op_pq_g, Op_hlg_g, Op_hlginv_g, Op_table_g }, + { Op_tf_b, Op_pq_b, Op_hlg_b, Op_hlginv_b, Op_table_b }, + { Op_tf_a, Op_pq_a, Op_hlg_a, Op_hlginv_a, Op_table_a }, + }; + const auto& op = ops[channel]; + + if (curve->table_entries == 0) { + const OpAndArg noop = { Op_load_a8/*doesn't matter*/, nullptr }; + + const skcms_TransferFunction& tf = curve->parametric; + + if (tf.g == 1 && tf.a == 1 && + tf.b == 0 && tf.c == 0 && tf.d == 0 && tf.e == 0 && tf.f == 0) { + return noop; + } + + switch (classify(tf)) { + case skcms_TFType_Invalid: return noop; + case skcms_TFType_sRGBish: return OpAndArg{op.sRGBish, &tf}; + case skcms_TFType_PQish: return OpAndArg{op.PQish, &tf}; + case skcms_TFType_HLGish: return OpAndArg{op.HLGish, &tf}; + case skcms_TFType_HLGinvish: return OpAndArg{op.HLGinvish, &tf}; + } + } + return OpAndArg{op.table, curve}; +} + +static size_t bytes_per_pixel(skcms_PixelFormat fmt) { + switch (fmt >> 1) { // ignore rgb/bgr + case skcms_PixelFormat_A_8 >> 1: return 1; + case skcms_PixelFormat_G_8 >> 1: return 1; + case skcms_PixelFormat_RGBA_8888_Palette8 >> 1: return 1; + case skcms_PixelFormat_ABGR_4444 >> 1: return 2; + case skcms_PixelFormat_RGB_565 >> 1: return 2; + case skcms_PixelFormat_RGB_888 >> 1: return 3; + case skcms_PixelFormat_RGBA_8888 >> 1: return 4; + case skcms_PixelFormat_RGBA_8888_sRGB >> 1: return 4; + case skcms_PixelFormat_RGBA_1010102 >> 1: return 4; + case skcms_PixelFormat_RGB_101010x_XR >> 1: return 4; + case skcms_PixelFormat_RGB_161616LE >> 1: return 6; + case skcms_PixelFormat_RGBA_16161616LE >> 1: return 8; + case skcms_PixelFormat_RGB_161616BE >> 1: return 6; + case skcms_PixelFormat_RGBA_16161616BE >> 1: return 8; + case skcms_PixelFormat_RGB_hhh_Norm >> 1: return 6; + case skcms_PixelFormat_RGBA_hhhh_Norm >> 1: return 8; + case skcms_PixelFormat_RGB_hhh >> 1: return 6; + case skcms_PixelFormat_RGBA_hhhh >> 1: return 8; + case skcms_PixelFormat_RGB_fff >> 1: return 12; + case skcms_PixelFormat_RGBA_ffff >> 1: return 16; + } + assert(false); + return 0; +} + +static bool prep_for_destination(const skcms_ICCProfile* profile, + skcms_Matrix3x3* fromXYZD50, + skcms_TransferFunction* invR, + skcms_TransferFunction* invG, + skcms_TransferFunction* invB) { + // skcms_Transform() supports B2A destinations... + if (profile->has_B2A) { return true; } + // ...and destinations with parametric transfer functions and an XYZD50 gamut matrix. + return profile->has_trc + && profile->has_toXYZD50 + && profile->trc[0].table_entries == 0 + && profile->trc[1].table_entries == 0 + && profile->trc[2].table_entries == 0 + && skcms_TransferFunction_invert(&profile->trc[0].parametric, invR) + && skcms_TransferFunction_invert(&profile->trc[1].parametric, invG) + && skcms_TransferFunction_invert(&profile->trc[2].parametric, invB) + && skcms_Matrix3x3_invert(&profile->toXYZD50, fromXYZD50); +} + +bool skcms_Transform(const void* src, + skcms_PixelFormat srcFmt, + skcms_AlphaFormat srcAlpha, + const skcms_ICCProfile* srcProfile, + void* dst, + skcms_PixelFormat dstFmt, + skcms_AlphaFormat dstAlpha, + const skcms_ICCProfile* dstProfile, + size_t npixels) { + return skcms_TransformWithPalette(src, srcFmt, srcAlpha, srcProfile, + dst, dstFmt, dstAlpha, dstProfile, + npixels, nullptr); +} + +bool skcms_TransformWithPalette(const void* src, + skcms_PixelFormat srcFmt, + skcms_AlphaFormat srcAlpha, + const skcms_ICCProfile* srcProfile, + void* dst, + skcms_PixelFormat dstFmt, + skcms_AlphaFormat dstAlpha, + const skcms_ICCProfile* dstProfile, + size_t nz, + const void* palette) { + const size_t dst_bpp = bytes_per_pixel(dstFmt), + src_bpp = bytes_per_pixel(srcFmt); + // Let's just refuse if the request is absurdly big. + if (nz * dst_bpp > INT_MAX || nz * src_bpp > INT_MAX) { + return false; + } + int n = (int)nz; + + // Null profiles default to sRGB. Passing null for both is handy when doing format conversion. + if (!srcProfile) { + srcProfile = skcms_sRGB_profile(); + } + if (!dstProfile) { + dstProfile = skcms_sRGB_profile(); + } + + // We can't transform in place unless the PixelFormats are the same size. + if (dst == src && dst_bpp != src_bpp) { + return false; + } + // TODO: more careful alias rejection (like, dst == src + 1)? + + if (needs_palette(srcFmt) && !palette) { + return false; + } + + Op program [32]; + const void* arguments[32]; + + Op* ops = program; + const void** args = arguments; + + // These are always parametric curves of some sort. + skcms_Curve dst_curves[3]; + dst_curves[0].table_entries = + dst_curves[1].table_entries = + dst_curves[2].table_entries = 0; + + skcms_Matrix3x3 from_xyz; + + switch (srcFmt >> 1) { + default: return false; + case skcms_PixelFormat_A_8 >> 1: *ops++ = Op_load_a8; break; + case skcms_PixelFormat_G_8 >> 1: *ops++ = Op_load_g8; break; + case skcms_PixelFormat_ABGR_4444 >> 1: *ops++ = Op_load_4444; break; + case skcms_PixelFormat_RGB_565 >> 1: *ops++ = Op_load_565; break; + case skcms_PixelFormat_RGB_888 >> 1: *ops++ = Op_load_888; break; + case skcms_PixelFormat_RGBA_8888 >> 1: *ops++ = Op_load_8888; break; + case skcms_PixelFormat_RGBA_1010102 >> 1: *ops++ = Op_load_1010102; break; + case skcms_PixelFormat_RGB_101010x_XR >> 1: *ops++ = Op_load_101010x_XR; break; + case skcms_PixelFormat_RGB_161616LE >> 1: *ops++ = Op_load_161616LE; break; + case skcms_PixelFormat_RGBA_16161616LE >> 1: *ops++ = Op_load_16161616LE; break; + case skcms_PixelFormat_RGB_161616BE >> 1: *ops++ = Op_load_161616BE; break; + case skcms_PixelFormat_RGBA_16161616BE >> 1: *ops++ = Op_load_16161616BE; break; + case skcms_PixelFormat_RGB_hhh_Norm >> 1: *ops++ = Op_load_hhh; break; + case skcms_PixelFormat_RGBA_hhhh_Norm >> 1: *ops++ = Op_load_hhhh; break; + case skcms_PixelFormat_RGB_hhh >> 1: *ops++ = Op_load_hhh; break; + case skcms_PixelFormat_RGBA_hhhh >> 1: *ops++ = Op_load_hhhh; break; + case skcms_PixelFormat_RGB_fff >> 1: *ops++ = Op_load_fff; break; + case skcms_PixelFormat_RGBA_ffff >> 1: *ops++ = Op_load_ffff; break; + + case skcms_PixelFormat_RGBA_8888_Palette8 >> 1: *ops++ = Op_load_8888_palette8; + *args++ = palette; + break; + case skcms_PixelFormat_RGBA_8888_sRGB >> 1: + *ops++ = Op_load_8888; + *ops++ = Op_tf_r; *args++ = skcms_sRGB_TransferFunction(); + *ops++ = Op_tf_g; *args++ = skcms_sRGB_TransferFunction(); + *ops++ = Op_tf_b; *args++ = skcms_sRGB_TransferFunction(); + break; + } + if (srcFmt == skcms_PixelFormat_RGB_hhh_Norm || + srcFmt == skcms_PixelFormat_RGBA_hhhh_Norm) { + *ops++ = Op_clamp; + } + if (srcFmt & 1) { + *ops++ = Op_swap_rb; + } + skcms_ICCProfile gray_dst_profile; + if ((dstFmt >> 1) == (skcms_PixelFormat_G_8 >> 1)) { + // When transforming to gray, stop at XYZ (by setting toXYZ to identity), then transform + // luminance (Y) by the destination transfer function. + gray_dst_profile = *dstProfile; + skcms_SetXYZD50(&gray_dst_profile, &skcms_XYZD50_profile()->toXYZD50); + dstProfile = &gray_dst_profile; + } + + if (srcProfile->data_color_space == skcms_Signature_CMYK) { + // Photoshop creates CMYK images as inverse CMYK. + // These happen to be the only ones we've _ever_ seen. + *ops++ = Op_invert; + // With CMYK, ignore the alpha type, to avoid changing K or conflating CMY with K. + srcAlpha = skcms_AlphaFormat_Unpremul; + } + + if (srcAlpha == skcms_AlphaFormat_Opaque) { + *ops++ = Op_force_opaque; + } else if (srcAlpha == skcms_AlphaFormat_PremulAsEncoded) { + *ops++ = Op_unpremul; + } + + if (dstProfile != srcProfile) { + + if (!prep_for_destination(dstProfile, + &from_xyz, + &dst_curves[0].parametric, + &dst_curves[1].parametric, + &dst_curves[2].parametric)) { + return false; + } + + if (srcProfile->has_A2B) { + if (srcProfile->A2B.input_channels) { + for (int i = 0; i < (int)srcProfile->A2B.input_channels; i++) { + OpAndArg oa = select_curve_op(&srcProfile->A2B.input_curves[i], i); + if (oa.arg) { + *ops++ = oa.op; + *args++ = oa.arg; + } + } + *ops++ = Op_clamp; + *ops++ = Op_clut_A2B; + *args++ = &srcProfile->A2B; + } + + if (srcProfile->A2B.matrix_channels == 3) { + for (int i = 0; i < 3; i++) { + OpAndArg oa = select_curve_op(&srcProfile->A2B.matrix_curves[i], i); + if (oa.arg) { + *ops++ = oa.op; + *args++ = oa.arg; + } + } + + static const skcms_Matrix3x4 I = {{ + {1,0,0,0}, + {0,1,0,0}, + {0,0,1,0}, + }}; + if (0 != memcmp(&I, &srcProfile->A2B.matrix, sizeof(I))) { + *ops++ = Op_matrix_3x4; + *args++ = &srcProfile->A2B.matrix; + } + } + + if (srcProfile->A2B.output_channels == 3) { + for (int i = 0; i < 3; i++) { + OpAndArg oa = select_curve_op(&srcProfile->A2B.output_curves[i], i); + if (oa.arg) { + *ops++ = oa.op; + *args++ = oa.arg; + } + } + } + + if (srcProfile->pcs == skcms_Signature_Lab) { + *ops++ = Op_lab_to_xyz; + } + + } else if (srcProfile->has_trc && srcProfile->has_toXYZD50) { + for (int i = 0; i < 3; i++) { + OpAndArg oa = select_curve_op(&srcProfile->trc[i], i); + if (oa.arg) { + *ops++ = oa.op; + *args++ = oa.arg; + } + } + } else { + return false; + } + + // A2B sources are in XYZD50 by now, but TRC sources are still in their original gamut. + assert (srcProfile->has_A2B || srcProfile->has_toXYZD50); + + if (dstProfile->has_B2A) { + // B2A needs its input in XYZD50, so transform TRC sources now. + if (!srcProfile->has_A2B) { + *ops++ = Op_matrix_3x3; + *args++ = &srcProfile->toXYZD50; + } + + if (dstProfile->pcs == skcms_Signature_Lab) { + *ops++ = Op_xyz_to_lab; + } + + if (dstProfile->B2A.input_channels == 3) { + for (int i = 0; i < 3; i++) { + OpAndArg oa = select_curve_op(&dstProfile->B2A.input_curves[i], i); + if (oa.arg) { + *ops++ = oa.op; + *args++ = oa.arg; + } + } + } + + if (dstProfile->B2A.matrix_channels == 3) { + static const skcms_Matrix3x4 I = {{ + {1,0,0,0}, + {0,1,0,0}, + {0,0,1,0}, + }}; + if (0 != memcmp(&I, &dstProfile->B2A.matrix, sizeof(I))) { + *ops++ = Op_matrix_3x4; + *args++ = &dstProfile->B2A.matrix; + } + + for (int i = 0; i < 3; i++) { + OpAndArg oa = select_curve_op(&dstProfile->B2A.matrix_curves[i], i); + if (oa.arg) { + *ops++ = oa.op; + *args++ = oa.arg; + } + } + } + + if (dstProfile->B2A.output_channels) { + *ops++ = Op_clamp; + *ops++ = Op_clut_B2A; + *args++ = &dstProfile->B2A; + for (int i = 0; i < (int)dstProfile->B2A.output_channels; i++) { + OpAndArg oa = select_curve_op(&dstProfile->B2A.output_curves[i], i); + if (oa.arg) { + *ops++ = oa.op; + *args++ = oa.arg; + } + } + } + } else { + // This is a TRC destination. + // We'll concat any src->xyz matrix with our xyz->dst matrix into one src->dst matrix. + // (A2B sources are already in XYZD50, making that src->xyz matrix I.) + static const skcms_Matrix3x3 I = {{ + { 1.0f, 0.0f, 0.0f }, + { 0.0f, 1.0f, 0.0f }, + { 0.0f, 0.0f, 1.0f }, + }}; + const skcms_Matrix3x3* to_xyz = srcProfile->has_A2B ? &I : &srcProfile->toXYZD50; + + // There's a chance the source and destination gamuts are identical, + // in which case we can skip the gamut transform. + if (0 != memcmp(&dstProfile->toXYZD50, to_xyz, sizeof(skcms_Matrix3x3))) { + // Concat the entire gamut transform into from_xyz, + // now slightly misnamed but it's a handy spot to stash the result. + from_xyz = skcms_Matrix3x3_concat(&from_xyz, to_xyz); + *ops++ = Op_matrix_3x3; + *args++ = &from_xyz; + } + + // Encode back to dst RGB using its parametric transfer functions. + for (int i = 0; i < 3; i++) { + OpAndArg oa = select_curve_op(dst_curves+i, i); + if (oa.arg) { + assert (oa.op != Op_table_r && + oa.op != Op_table_g && + oa.op != Op_table_b && + oa.op != Op_table_a); + *ops++ = oa.op; + *args++ = oa.arg; + } + } + } + } + + // Clamp here before premul to make sure we're clamping to normalized values _and_ gamut, + // not just to values that fit in [0,1]. + // + // E.g. r = 1.1, a = 0.5 would fit fine in fixed point after premul (ra=0.55,a=0.5), + // but would be carrying r > 1, which is really unexpected for downstream consumers. + if (dstFmt < skcms_PixelFormat_RGB_hhh) { + *ops++ = Op_clamp; + } + + if (dstProfile->data_color_space == skcms_Signature_CMYK) { + // Photoshop creates CMYK images as inverse CMYK. + // These happen to be the only ones we've _ever_ seen. + *ops++ = Op_invert; + + // CMYK has no alpha channel, so make sure dstAlpha is a no-op. + dstAlpha = skcms_AlphaFormat_Unpremul; + } + + if (dstAlpha == skcms_AlphaFormat_Opaque) { + *ops++ = Op_force_opaque; + } else if (dstAlpha == skcms_AlphaFormat_PremulAsEncoded) { + *ops++ = Op_premul; + } + if (dstFmt & 1) { + *ops++ = Op_swap_rb; + } + switch (dstFmt >> 1) { + default: return false; + case skcms_PixelFormat_A_8 >> 1: *ops++ = Op_store_a8; break; + case skcms_PixelFormat_G_8 >> 1: *ops++ = Op_store_g8; break; + case skcms_PixelFormat_ABGR_4444 >> 1: *ops++ = Op_store_4444; break; + case skcms_PixelFormat_RGB_565 >> 1: *ops++ = Op_store_565; break; + case skcms_PixelFormat_RGB_888 >> 1: *ops++ = Op_store_888; break; + case skcms_PixelFormat_RGBA_8888 >> 1: *ops++ = Op_store_8888; break; + case skcms_PixelFormat_RGBA_1010102 >> 1: *ops++ = Op_store_1010102; break; + case skcms_PixelFormat_RGB_161616LE >> 1: *ops++ = Op_store_161616LE; break; + case skcms_PixelFormat_RGBA_16161616LE >> 1: *ops++ = Op_store_16161616LE; break; + case skcms_PixelFormat_RGB_161616BE >> 1: *ops++ = Op_store_161616BE; break; + case skcms_PixelFormat_RGBA_16161616BE >> 1: *ops++ = Op_store_16161616BE; break; + case skcms_PixelFormat_RGB_hhh_Norm >> 1: *ops++ = Op_store_hhh; break; + case skcms_PixelFormat_RGBA_hhhh_Norm >> 1: *ops++ = Op_store_hhhh; break; + case skcms_PixelFormat_RGB_101010x_XR >> 1: *ops++ = Op_store_101010x_XR; break; + case skcms_PixelFormat_RGB_hhh >> 1: *ops++ = Op_store_hhh; break; + case skcms_PixelFormat_RGBA_hhhh >> 1: *ops++ = Op_store_hhhh; break; + case skcms_PixelFormat_RGB_fff >> 1: *ops++ = Op_store_fff; break; + case skcms_PixelFormat_RGBA_ffff >> 1: *ops++ = Op_store_ffff; break; + + case skcms_PixelFormat_RGBA_8888_sRGB >> 1: + *ops++ = Op_tf_r; *args++ = skcms_sRGB_Inverse_TransferFunction(); + *ops++ = Op_tf_g; *args++ = skcms_sRGB_Inverse_TransferFunction(); + *ops++ = Op_tf_b; *args++ = skcms_sRGB_Inverse_TransferFunction(); + *ops++ = Op_store_8888; + break; + } + + auto run = baseline::run_program; +#if defined(TEST_FOR_HSW) + switch (cpu_type()) { + case CpuType::None: break; + case CpuType::HSW: run = hsw::run_program; break; + case CpuType::SKX: run = hsw::run_program; break; + } +#endif +#if defined(TEST_FOR_SKX) + switch (cpu_type()) { + case CpuType::None: break; + case CpuType::HSW: break; + case CpuType::SKX: run = skx::run_program; break; + } +#endif + run(program, arguments, (const char*)src, (char*)dst, n, src_bpp,dst_bpp); + return true; +} + +static void assert_usable_as_destination(const skcms_ICCProfile* profile) { +#if defined(NDEBUG) + (void)profile; +#else + skcms_Matrix3x3 fromXYZD50; + skcms_TransferFunction invR, invG, invB; + assert(prep_for_destination(profile, &fromXYZD50, &invR, &invG, &invB)); +#endif +} + +bool skcms_MakeUsableAsDestination(skcms_ICCProfile* profile) { + if (!profile->has_B2A) { + skcms_Matrix3x3 fromXYZD50; + if (!profile->has_trc || !profile->has_toXYZD50 + || !skcms_Matrix3x3_invert(&profile->toXYZD50, &fromXYZD50)) { + return false; + } + + skcms_TransferFunction tf[3]; + for (int i = 0; i < 3; i++) { + skcms_TransferFunction inv; + if (profile->trc[i].table_entries == 0 + && skcms_TransferFunction_invert(&profile->trc[i].parametric, &inv)) { + tf[i] = profile->trc[i].parametric; + continue; + } + + float max_error; + // Parametric curves from skcms_ApproximateCurve() are guaranteed to be invertible. + if (!skcms_ApproximateCurve(&profile->trc[i], &tf[i], &max_error)) { + return false; + } + } + + for (int i = 0; i < 3; ++i) { + profile->trc[i].table_entries = 0; + profile->trc[i].parametric = tf[i]; + } + } + assert_usable_as_destination(profile); + return true; +} + +bool skcms_MakeUsableAsDestinationWithSingleCurve(skcms_ICCProfile* profile) { + // Call skcms_MakeUsableAsDestination() with B2A disabled; + // on success that'll return a TRC/XYZ profile with three skcms_TransferFunctions. + skcms_ICCProfile result = *profile; + result.has_B2A = false; + if (!skcms_MakeUsableAsDestination(&result)) { + return false; + } + + // Of the three, pick the transfer function that best fits the other two. + int best_tf = 0; + float min_max_error = INFINITY_; + for (int i = 0; i < 3; i++) { + skcms_TransferFunction inv; + if (!skcms_TransferFunction_invert(&result.trc[i].parametric, &inv)) { + return false; + } + + float err = 0; + for (int j = 0; j < 3; ++j) { + err = fmaxf_(err, skcms_MaxRoundtripError(&profile->trc[j], &inv)); + } + if (min_max_error > err) { + min_max_error = err; + best_tf = i; + } + } + + for (int i = 0; i < 3; i++) { + result.trc[i].parametric = result.trc[best_tf].parametric; + } + + *profile = result; + assert_usable_as_destination(profile); + return true; +} diff --git a/gfx/skia/skia/modules/skcms/skcms.gni b/gfx/skia/skia/modules/skcms/skcms.gni new file mode 100644 index 0000000000..aa7daa2cf4 --- /dev/null +++ b/gfx/skia/skia/modules/skcms/skcms.gni @@ -0,0 +1,20 @@ +# DO NOT EDIT: This is a generated file. +# See //bazel/exporter_tool/README.md for more information. +# +# The source of truth is //modules/skcms/BUILD.bazel + +# To update this file, run make -C bazel generate_gni + +_modules = get_path_info("../../modules", "abspath") + +# Generated by Bazel rule //modules/skcms:public_hdrs +skcms_public_headers = [ "$_modules/skcms/skcms.h" ] + +# List generated by Bazel rules: +# //modules/skcms:srcs +# //modules/skcms:textual_hdrs +skcms_sources = [ + "$_modules/skcms/skcms.cc", + "$_modules/skcms/skcms_internal.h", + "$_modules/skcms/src/Transform_inl.h", +] diff --git a/gfx/skia/skia/modules/skcms/skcms.h b/gfx/skia/skia/modules/skcms/skcms.h new file mode 100644 index 0000000000..322549b38f --- /dev/null +++ b/gfx/skia/skia/modules/skcms/skcms.h @@ -0,0 +1,418 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#pragma once + +// skcms.h contains the entire public API for skcms. + +#ifndef SKCMS_API + #define SKCMS_API +#endif + +#include +#include +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +// A row-major 3x3 matrix (ie vals[row][col]) +typedef struct skcms_Matrix3x3 { + float vals[3][3]; +} skcms_Matrix3x3; + +// It is _not_ safe to alias the pointers to invert in-place. +SKCMS_API bool skcms_Matrix3x3_invert(const skcms_Matrix3x3*, skcms_Matrix3x3*); +SKCMS_API skcms_Matrix3x3 skcms_Matrix3x3_concat(const skcms_Matrix3x3*, const skcms_Matrix3x3*); + +// A row-major 3x4 matrix (ie vals[row][col]) +typedef struct skcms_Matrix3x4 { + float vals[3][4]; +} skcms_Matrix3x4; + +// A transfer function mapping encoded values to linear values, +// represented by this 7-parameter piecewise function: +// +// linear = sign(encoded) * (c*|encoded| + f) , 0 <= |encoded| < d +// = sign(encoded) * ((a*|encoded| + b)^g + e), d <= |encoded| +// +// (A simple gamma transfer function sets g to gamma and a to 1.) +typedef struct skcms_TransferFunction { + float g, a,b,c,d,e,f; +} skcms_TransferFunction; + +SKCMS_API float skcms_TransferFunction_eval (const skcms_TransferFunction*, float); +SKCMS_API bool skcms_TransferFunction_invert(const skcms_TransferFunction*, + skcms_TransferFunction*); + +typedef enum skcms_TFType { + skcms_TFType_Invalid, + skcms_TFType_sRGBish, + skcms_TFType_PQish, + skcms_TFType_HLGish, + skcms_TFType_HLGinvish, +} skcms_TFType; + +// Identify which kind of transfer function is encoded in an skcms_TransferFunction +SKCMS_API skcms_TFType skcms_TransferFunction_getType(const skcms_TransferFunction*); + +// We can jam a couple alternate transfer function forms into skcms_TransferFunction, +// including those matching the general forms of the SMPTE ST 2084 PQ function or HLG. +// +// PQish: +// max(A + B|encoded|^C, 0) +// linear = sign(encoded) * (------------------------) ^ F +// D + E|encoded|^C +SKCMS_API bool skcms_TransferFunction_makePQish(skcms_TransferFunction*, + float A, float B, float C, + float D, float E, float F); +// HLGish: +// { K * sign(encoded) * ( (R|encoded|)^G ) when 0 <= |encoded| <= 1/R +// linear = { K * sign(encoded) * ( e^(a(|encoded|-c)) + b ) when 1/R < |encoded| +SKCMS_API bool skcms_TransferFunction_makeScaledHLGish(skcms_TransferFunction*, + float K, float R, float G, + float a, float b, float c); + +// Compatibility shim with K=1 for old callers. +static inline bool skcms_TransferFunction_makeHLGish(skcms_TransferFunction* fn, + float R, float G, + float a, float b, float c) { + return skcms_TransferFunction_makeScaledHLGish(fn, 1.0f, R,G, a,b,c); +} + +// PQ mapping encoded [0,1] to linear [0,1]. +static inline bool skcms_TransferFunction_makePQ(skcms_TransferFunction* tf) { + return skcms_TransferFunction_makePQish(tf, -107/128.0f, 1.0f, 32/2523.0f + , 2413/128.0f, -2392/128.0f, 8192/1305.0f); +} +// HLG mapping encoded [0,1] to linear [0,12]. +static inline bool skcms_TransferFunction_makeHLG(skcms_TransferFunction* tf) { + return skcms_TransferFunction_makeHLGish(tf, 2.0f, 2.0f + , 1/0.17883277f, 0.28466892f, 0.55991073f); +} + +// Is this an ordinary sRGB-ish transfer function, or one of the HDR forms we support? +SKCMS_API bool skcms_TransferFunction_isSRGBish(const skcms_TransferFunction*); +SKCMS_API bool skcms_TransferFunction_isPQish (const skcms_TransferFunction*); +SKCMS_API bool skcms_TransferFunction_isHLGish (const skcms_TransferFunction*); + +// Unified representation of 'curv' or 'para' tag data, or a 1D table from 'mft1' or 'mft2' +typedef union skcms_Curve { + struct { + uint32_t alias_of_table_entries; + skcms_TransferFunction parametric; + }; + struct { + uint32_t table_entries; + const uint8_t* table_8; + const uint8_t* table_16; + }; +} skcms_Curve; + +// Complex transforms between device space (A) and profile connection space (B): +// A2B: device -> [ "A" curves -> CLUT ] -> [ "M" curves -> matrix ] -> "B" curves -> PCS +// B2A: device <- [ "A" curves <- CLUT ] <- [ "M" curves <- matrix ] <- "B" curves <- PCS + +typedef struct skcms_A2B { + // Optional: N 1D "A" curves, followed by an N-dimensional CLUT. + // If input_channels == 0, these curves and CLUT are skipped, + // Otherwise, input_channels must be in [1, 4]. + uint32_t input_channels; + skcms_Curve input_curves[4]; + uint8_t grid_points[4]; + const uint8_t* grid_8; + const uint8_t* grid_16; + + // Optional: 3 1D "M" curves, followed by a color matrix. + // If matrix_channels == 0, these curves and matrix are skipped, + // Otherwise, matrix_channels must be 3. + uint32_t matrix_channels; + skcms_Curve matrix_curves[3]; + skcms_Matrix3x4 matrix; + + // Required: 3 1D "B" curves. Always present, and output_channels must be 3. + uint32_t output_channels; + skcms_Curve output_curves[3]; +} skcms_A2B; + +typedef struct skcms_B2A { + // Required: 3 1D "B" curves. Always present, and input_channels must be 3. + uint32_t input_channels; + skcms_Curve input_curves[3]; + + // Optional: a color matrix, followed by 3 1D "M" curves. + // If matrix_channels == 0, this matrix and these curves are skipped, + // Otherwise, matrix_channels must be 3. + uint32_t matrix_channels; + skcms_Matrix3x4 matrix; + skcms_Curve matrix_curves[3]; + + // Optional: an N-dimensional CLUT, followed by N 1D "A" curves. + // If output_channels == 0, this CLUT and these curves are skipped, + // Otherwise, output_channels must be in [1, 4]. + uint32_t output_channels; + uint8_t grid_points[4]; + const uint8_t* grid_8; + const uint8_t* grid_16; + skcms_Curve output_curves[4]; +} skcms_B2A; + +typedef struct skcms_CICP { + uint8_t color_primaries; + uint8_t transfer_characteristics; + uint8_t matrix_coefficients; + uint8_t video_full_range_flag; +} skcms_CICP; + +typedef struct skcms_ICCProfile { + const uint8_t* buffer; + + uint32_t size; + uint32_t data_color_space; + uint32_t pcs; + uint32_t tag_count; + + // skcms_Parse() will set commonly-used fields for you when possible: + + // If we can parse red, green and blue transfer curves from the profile, + // trc will be set to those three curves, and has_trc will be true. + bool has_trc; + skcms_Curve trc[3]; + + // If this profile's gamut can be represented by a 3x3 transform to XYZD50, + // skcms_Parse() sets toXYZD50 to that transform and has_toXYZD50 to true. + bool has_toXYZD50; + skcms_Matrix3x3 toXYZD50; + + // If the profile has a valid A2B0 or A2B1 tag, skcms_Parse() sets A2B to + // that data, and has_A2B to true. skcms_ParseWithA2BPriority() does the + // same following any user-provided prioritization of A2B0, A2B1, or A2B2. + bool has_A2B; + skcms_A2B A2B; + + // If the profile has a valid B2A0 or B2A1 tag, skcms_Parse() sets B2A to + // that data, and has_B2A to true. skcms_ParseWithA2BPriority() does the + // same following any user-provided prioritization of B2A0, B2A1, or B2A2. + bool has_B2A; + skcms_B2A B2A; + + // If the profile has a valid CICP tag, skcms_Parse() sets CICP to that data, + // and has_CICP to true. + bool has_CICP; + skcms_CICP CICP; +} skcms_ICCProfile; + +// The sRGB color profile is so commonly used that we offer a canonical skcms_ICCProfile for it. +SKCMS_API const skcms_ICCProfile* skcms_sRGB_profile(void); +// Ditto for XYZD50, the most common profile connection space. +SKCMS_API const skcms_ICCProfile* skcms_XYZD50_profile(void); + +SKCMS_API const skcms_TransferFunction* skcms_sRGB_TransferFunction(void); +SKCMS_API const skcms_TransferFunction* skcms_sRGB_Inverse_TransferFunction(void); +SKCMS_API const skcms_TransferFunction* skcms_Identity_TransferFunction(void); + +// Practical equality test for two skcms_ICCProfiles. +// The implementation is subject to change, but it will always try to answer +// "can I substitute A for B?" and "can I skip transforming from A to B?". +SKCMS_API bool skcms_ApproximatelyEqualProfiles(const skcms_ICCProfile* A, + const skcms_ICCProfile* B); + +// Practical test that answers: Is curve roughly the inverse of inv_tf? Typically used by passing +// the inverse of a known parametric transfer function (like sRGB), to determine if a particular +// curve is very close to sRGB. +SKCMS_API bool skcms_AreApproximateInverses(const skcms_Curve* curve, + const skcms_TransferFunction* inv_tf); + +// Similar to above, answering the question for all three TRC curves of the given profile. Again, +// passing skcms_sRGB_InverseTransferFunction as inv_tf will answer the question: +// "Does this profile have a transfer function that is very close to sRGB?" +SKCMS_API bool skcms_TRCs_AreApproximateInverse(const skcms_ICCProfile* profile, + const skcms_TransferFunction* inv_tf); + +// Parse an ICC profile and return true if possible, otherwise return false. +// Selects an A2B profile (if present) according to priority list (each entry 0-2). +// The buffer is not copied; it must remain valid as long as the skcms_ICCProfile will be used. +SKCMS_API bool skcms_ParseWithA2BPriority(const void*, size_t, + const int priority[], int priorities, + skcms_ICCProfile*); + +static inline bool skcms_Parse(const void* buf, size_t len, skcms_ICCProfile* profile) { + // For continuity of existing user expectations, + // prefer A2B0 (perceptual) over A2B1 (relative colormetric), and ignore A2B2 (saturation). + const int priority[] = {0,1}; + return skcms_ParseWithA2BPriority(buf, len, + priority, sizeof(priority)/sizeof(*priority), + profile); +} + +SKCMS_API bool skcms_ApproximateCurve(const skcms_Curve* curve, + skcms_TransferFunction* approx, + float* max_error); + +SKCMS_API bool skcms_GetCHAD(const skcms_ICCProfile*, skcms_Matrix3x3*); +SKCMS_API bool skcms_GetWTPT(const skcms_ICCProfile*, float xyz[3]); + +// These are common ICC signature values +enum { + // data_color_space + skcms_Signature_CMYK = 0x434D594B, + skcms_Signature_Gray = 0x47524159, + skcms_Signature_RGB = 0x52474220, + + // pcs + skcms_Signature_Lab = 0x4C616220, + skcms_Signature_XYZ = 0x58595A20, +}; + +typedef enum skcms_PixelFormat { + skcms_PixelFormat_A_8, + skcms_PixelFormat_A_8_, + skcms_PixelFormat_G_8, + skcms_PixelFormat_G_8_, + skcms_PixelFormat_RGBA_8888_Palette8, + skcms_PixelFormat_BGRA_8888_Palette8, + + skcms_PixelFormat_RGB_565, + skcms_PixelFormat_BGR_565, + + skcms_PixelFormat_ABGR_4444, + skcms_PixelFormat_ARGB_4444, + + skcms_PixelFormat_RGB_888, + skcms_PixelFormat_BGR_888, + skcms_PixelFormat_RGBA_8888, + skcms_PixelFormat_BGRA_8888, + skcms_PixelFormat_RGBA_8888_sRGB, // Automatic sRGB encoding / decoding. + skcms_PixelFormat_BGRA_8888_sRGB, // (Generally used with linear transfer functions.) + + skcms_PixelFormat_RGBA_1010102, + skcms_PixelFormat_BGRA_1010102, + + skcms_PixelFormat_RGB_161616LE, // Little-endian. Pointers must be 16-bit aligned. + skcms_PixelFormat_BGR_161616LE, + skcms_PixelFormat_RGBA_16161616LE, + skcms_PixelFormat_BGRA_16161616LE, + + skcms_PixelFormat_RGB_161616BE, // Big-endian. Pointers must be 16-bit aligned. + skcms_PixelFormat_BGR_161616BE, + skcms_PixelFormat_RGBA_16161616BE, + skcms_PixelFormat_BGRA_16161616BE, + + skcms_PixelFormat_RGB_hhh_Norm, // 1-5-10 half-precision float in [0,1] + skcms_PixelFormat_BGR_hhh_Norm, // Pointers must be 16-bit aligned. + skcms_PixelFormat_RGBA_hhhh_Norm, + skcms_PixelFormat_BGRA_hhhh_Norm, + + skcms_PixelFormat_RGB_hhh, // 1-5-10 half-precision float. + skcms_PixelFormat_BGR_hhh, // Pointers must be 16-bit aligned. + skcms_PixelFormat_RGBA_hhhh, + skcms_PixelFormat_BGRA_hhhh, + + skcms_PixelFormat_RGB_fff, // 1-8-23 single-precision float (the normal kind). + skcms_PixelFormat_BGR_fff, // Pointers must be 32-bit aligned. + skcms_PixelFormat_RGBA_ffff, + skcms_PixelFormat_BGRA_ffff, + + skcms_PixelFormat_RGB_101010x_XR, // Note: This is located here to signal no clamping. + skcms_PixelFormat_BGR_101010x_XR, // Compatible with MTLPixelFormatBGR10_XR. +} skcms_PixelFormat; + +// We always store any alpha channel linearly. In the chart below, tf-1() is the inverse +// transfer function for the given color profile (applying the transfer function linearizes). + +// We treat opaque as a strong requirement, not just a performance hint: we will ignore +// any source alpha and treat it as 1.0, and will make sure that any destination alpha +// channel is filled with the equivalent of 1.0. + +// We used to offer multiple types of premultiplication, but now just one, PremulAsEncoded. +// This is the premul you're probably used to working with. + +typedef enum skcms_AlphaFormat { + skcms_AlphaFormat_Opaque, // alpha is always opaque + // tf-1(r), tf-1(g), tf-1(b), 1.0 + skcms_AlphaFormat_Unpremul, // alpha and color are unassociated + // tf-1(r), tf-1(g), tf-1(b), a + skcms_AlphaFormat_PremulAsEncoded, // premultiplied while encoded + // tf-1(r)*a, tf-1(g)*a, tf-1(b)*a, a +} skcms_AlphaFormat; + +// Convert npixels pixels from src format and color profile to dst format and color profile +// and return true, otherwise return false. It is safe to alias dst == src if dstFmt == srcFmt. +SKCMS_API bool skcms_Transform(const void* src, + skcms_PixelFormat srcFmt, + skcms_AlphaFormat srcAlpha, + const skcms_ICCProfile* srcProfile, + void* dst, + skcms_PixelFormat dstFmt, + skcms_AlphaFormat dstAlpha, + const skcms_ICCProfile* dstProfile, + size_t npixels); + +// As skcms_Transform(), supporting srcFmts with a palette. +SKCMS_API bool skcms_TransformWithPalette(const void* src, + skcms_PixelFormat srcFmt, + skcms_AlphaFormat srcAlpha, + const skcms_ICCProfile* srcProfile, + void* dst, + skcms_PixelFormat dstFmt, + skcms_AlphaFormat dstAlpha, + const skcms_ICCProfile* dstProfile, + size_t npixels, + const void* palette); + +// If profile can be used as a destination in skcms_Transform, return true. Otherwise, attempt to +// rewrite it with approximations where reasonable. If successful, return true. If no reasonable +// approximation exists, leave the profile unchanged and return false. +SKCMS_API bool skcms_MakeUsableAsDestination(skcms_ICCProfile* profile); + +// If profile can be used as a destination with a single parametric transfer function (ie for +// rasterization), return true. Otherwise, attempt to rewrite it with approximations where +// reasonable. If successful, return true. If no reasonable approximation exists, leave the +// profile unchanged and return false. +SKCMS_API bool skcms_MakeUsableAsDestinationWithSingleCurve(skcms_ICCProfile* profile); + +// Returns a matrix to adapt XYZ color from given the whitepoint to D50. +SKCMS_API bool skcms_AdaptToXYZD50(float wx, float wy, + skcms_Matrix3x3* toXYZD50); + +// Returns a matrix to convert RGB color into XYZ adapted to D50, given the +// primaries and whitepoint of the RGB model. +SKCMS_API bool skcms_PrimariesToXYZD50(float rx, float ry, + float gx, float gy, + float bx, float by, + float wx, float wy, + skcms_Matrix3x3* toXYZD50); + +// Call before your first call to skcms_Transform() to skip runtime CPU detection. +SKCMS_API void skcms_DisableRuntimeCPUDetection(void); + +// Utilities for programmatically constructing profiles +static inline void skcms_Init(skcms_ICCProfile* p) { + memset(p, 0, sizeof(*p)); + p->data_color_space = skcms_Signature_RGB; + p->pcs = skcms_Signature_XYZ; +} + +static inline void skcms_SetTransferFunction(skcms_ICCProfile* p, + const skcms_TransferFunction* tf) { + p->has_trc = true; + for (int i = 0; i < 3; ++i) { + p->trc[i].table_entries = 0; + p->trc[i].parametric = *tf; + } +} + +static inline void skcms_SetXYZD50(skcms_ICCProfile* p, const skcms_Matrix3x3* m) { + p->has_toXYZD50 = true; + p->toXYZD50 = *m; +} + +#ifdef __cplusplus +} +#endif diff --git a/gfx/skia/skia/modules/skcms/skcms_internal.h b/gfx/skia/skia/modules/skcms/skcms_internal.h new file mode 100644 index 0000000000..cc6d578ba0 --- /dev/null +++ b/gfx/skia/skia/modules/skcms/skcms_internal.h @@ -0,0 +1,56 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#pragma once + +// skcms_internal.h contains APIs shared by skcms' internals and its test tools. +// Please don't use this header from outside the skcms repo. + +#include "skcms.h" +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +// ~~~~ General Helper Macros ~~~~ + #define ARRAY_COUNT(arr) (int)(sizeof((arr)) / sizeof(*(arr))) + + typedef struct skcms_ICCTag { + uint32_t signature; + uint32_t type; + uint32_t size; + const uint8_t* buf; + } skcms_ICCTag; + + void skcms_GetTagByIndex (const skcms_ICCProfile*, uint32_t idx, skcms_ICCTag*); + bool skcms_GetTagBySignature(const skcms_ICCProfile*, uint32_t sig, skcms_ICCTag*); + + float skcms_MaxRoundtripError(const skcms_Curve* curve, const skcms_TransferFunction* inv_tf); + + // 252 of a random shuffle of all possible bytes. + // 252 is evenly divisible by 3 and 4. Only 192, 10, 241, and 43 are missing. + // Used for ICC profile equivalence testing. + extern const uint8_t skcms_252_random_bytes[252]; + +// ~~~~ Portable Math ~~~~ + static inline float floorf_(float x) { + float roundtrip = (float)((int)x); + return roundtrip > x ? roundtrip - 1 : roundtrip; + } + static inline float fabsf_(float x) { return x < 0 ? -x : x; } + float powf_(float, float); + +// ~~~~ Does this pixel format need a palette pointer to be usable? ~~~~ + static inline bool needs_palette(skcms_PixelFormat fmt) { + return (fmt >> 1) == (skcms_PixelFormat_RGBA_8888_Palette8 >> 1); + } + +#ifdef __cplusplus +} +#endif diff --git a/gfx/skia/skia/modules/skcms/src/Transform_inl.h b/gfx/skia/skia/modules/skcms/src/Transform_inl.h new file mode 100644 index 0000000000..350f6a20a6 --- /dev/null +++ b/gfx/skia/skia/modules/skcms/src/Transform_inl.h @@ -0,0 +1,1628 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// Intentionally NO #pragma once... included multiple times. + +// This file is included from skcms.cc in a namespace with some pre-defines: +// - N: depth of all vectors, 1,4,8, or 16 (preprocessor define) +// - V: a template to create a vector of N T's. + +using F = V; // Called F for historic reasons... maybe rename C? +using I32 = V; +using U64 = V; +using U32 = V; +using U16 = V; +using U8 = V; + + +#if defined(__GNUC__) && !defined(__clang__) + // Once again, GCC is kind of weird, not allowing vector = scalar directly. + static constexpr F F0 = F() + 0.0f, + F1 = F() + 1.0f, + FInfBits = F() + 0x7f800000; // equals 2139095040, the bit pattern of +Inf +#else + static constexpr F F0 = 0.0f, + F1 = 1.0f, + FInfBits = 0x7f800000; // equals 2139095040, the bit pattern of +Inf +#endif + +// Instead of checking __AVX__ below, we'll check USING_AVX. +// This lets skcms.cc set USING_AVX to force us in even if the compiler's not set that way. +// Same deal for __F16C__ and __AVX2__ ~~~> USING_AVX_F16C, USING_AVX2. + +#if !defined(USING_AVX) && N == 8 && defined(__AVX__) + #define USING_AVX +#endif +#if !defined(USING_AVX_F16C) && defined(USING_AVX) && defined(__F16C__) + #define USING AVX_F16C +#endif +#if !defined(USING_AVX2) && defined(USING_AVX) && defined(__AVX2__) + #define USING_AVX2 +#endif +#if !defined(USING_AVX512F) && N == 16 && defined(__AVX512F__) && defined(__AVX512DQ__) + #define USING_AVX512F +#endif + +// Similar to the AVX+ features, we define USING_NEON and USING_NEON_F16C. +// This is more for organizational clarity... skcms.cc doesn't force these. +#if N > 1 && defined(__ARM_NEON) + #define USING_NEON + #if __ARM_FP & 2 + #define USING_NEON_F16C + #endif + #if defined(__ARM_FEATURE_FP16_VECTOR_ARITHMETIC) && defined(SKCMS_OPT_INTO_NEON_FP16) + #define USING_NEON_FP16 + #endif +#endif + +// These -Wvector-conversion warnings seem to trigger in very bogus situations, +// like vst3q_f32() expecting a 16x char rather than a 4x float vector. :/ +#if defined(USING_NEON) && defined(__clang__) + #pragma clang diagnostic ignored "-Wvector-conversion" +#endif + +// GCC & Clang (but not clang-cl) warn returning U64 on x86 is larger than a register. +// You'd see warnings like, "using AVX even though AVX is not enabled". +// We stifle these warnings; our helpers that return U64 are always inlined. +#if defined(__SSE__) && defined(__GNUC__) + #if !defined(__has_warning) + #pragma GCC diagnostic ignored "-Wpsabi" + #elif __has_warning("-Wpsabi") + #pragma GCC diagnostic ignored "-Wpsabi" + #endif +#endif + +#if defined(__clang__) + #define FALLTHROUGH [[clang::fallthrough]] +#else + #define FALLTHROUGH +#endif + +// We tag most helper functions as SI, to enforce good code generation +// but also work around what we think is a bug in GCC: when targeting 32-bit +// x86, GCC tends to pass U16 (4x uint16_t vector) function arguments in the +// MMX mm0 register, which seems to mess with unrelated code that later uses +// x87 FP instructions (MMX's mm0 is an alias for x87's st0 register). +// +// It helps codegen to call __builtin_memcpy() when we know the byte count at compile time. +#if defined(__clang__) || defined(__GNUC__) + #define SI static inline __attribute__((always_inline)) +#else + #define SI static inline +#endif + +template +SI T load(const P* ptr) { + T val; + small_memcpy(&val, ptr, sizeof(val)); + return val; +} +template +SI void store(P* ptr, const T& val) { + small_memcpy(ptr, &val, sizeof(val)); +} + +// (T)v is a cast when N == 1 and a bit-pun when N>1, +// so we use cast(v) to actually cast or bit_pun(v) to bit-pun. +template +SI D cast(const S& v) { +#if N == 1 + return (D)v; +#elif defined(__clang__) + return __builtin_convertvector(v, D); +#else + D d; + for (int i = 0; i < N; i++) { + d[i] = v[i]; + } + return d; +#endif +} + +template +SI D bit_pun(const S& v) { + static_assert(sizeof(D) == sizeof(v), ""); + return load(&v); +} + +// When we convert from float to fixed point, it's very common to want to round, +// and for some reason compilers generate better code when converting to int32_t. +// To serve both those ends, we use this function to_fixed() instead of direct cast(). +#if defined(USING_NEON_FP16) + // NEON's got a F16 -> U16 instruction, so this should be fine without going via I16. + SI U16 to_fixed(F f) { return cast(f + 0.5f); } +#else + SI U32 to_fixed(F f) { return (U32)cast(f + 0.5f); } +#endif + + +// Sometimes we do something crazy on one branch of a conditonal, +// like divide by zero or convert a huge float to an integer, +// but then harmlessly select the other side. That trips up N==1 +// sanitizer builds, so we make if_then_else() a macro to avoid +// evaluating the unused side. + +#if N == 1 + #define if_then_else(cond, t, e) ((cond) ? (t) : (e)) +#else + template + SI T if_then_else(C cond, T t, T e) { + return bit_pun( ( cond & bit_pun(t)) | + (~cond & bit_pun(e)) ); + } +#endif + + +SI F F_from_Half(U16 half) { +#if defined(USING_NEON_FP16) + return bit_pun(half); +#elif defined(USING_NEON_F16C) + return vcvt_f32_f16((float16x4_t)half); +#elif defined(USING_AVX512F) + return (F)_mm512_cvtph_ps((__m256i)half); +#elif defined(USING_AVX_F16C) + typedef int16_t __attribute__((vector_size(16))) I16; + return __builtin_ia32_vcvtph2ps256((I16)half); +#else + U32 wide = cast(half); + // A half is 1-5-10 sign-exponent-mantissa, with 15 exponent bias. + U32 s = wide & 0x8000, + em = wide ^ s; + + // Constructing the float is easy if the half is not denormalized. + F norm = bit_pun( (s<<16) + (em<<13) + ((127-15)<<23) ); + + // Simply flush all denorm half floats to zero. + return if_then_else(em < 0x0400, F0, norm); +#endif +} + +#if defined(__clang__) + // The -((127-15)<<10) underflows that side of the math when + // we pass a denorm half float. It's harmless... we'll take the 0 side anyway. + __attribute__((no_sanitize("unsigned-integer-overflow"))) +#endif +SI U16 Half_from_F(F f) { +#if defined(USING_NEON_FP16) + return bit_pun(f); +#elif defined(USING_NEON_F16C) + return (U16)vcvt_f16_f32(f); +#elif defined(USING_AVX512F) + return (U16)_mm512_cvtps_ph((__m512 )f, _MM_FROUND_CUR_DIRECTION ); +#elif defined(USING_AVX_F16C) + return (U16)__builtin_ia32_vcvtps2ph256(f, 0x04/*_MM_FROUND_CUR_DIRECTION*/); +#else + // A float is 1-8-23 sign-exponent-mantissa, with 127 exponent bias. + U32 sem = bit_pun(f), + s = sem & 0x80000000, + em = sem ^ s; + + // For simplicity we flush denorm half floats (including all denorm floats) to zero. + return cast(if_then_else(em < 0x38800000, (U32)F0 + , (s>>16) + (em>>13) - ((127-15)<<10))); +#endif +} + +// Swap high and low bytes of 16-bit lanes, converting between big-endian and little-endian. +#if defined(USING_NEON_FP16) + SI U16 swap_endian_16(U16 v) { + return (U16)vrev16q_u8((uint8x16_t) v); + } +#elif defined(USING_NEON) + SI U16 swap_endian_16(U16 v) { + return (U16)vrev16_u8((uint8x8_t) v); + } +#endif + +SI U64 swap_endian_16x4(const U64& rgba) { + return (rgba & 0x00ff00ff00ff00ff) << 8 + | (rgba & 0xff00ff00ff00ff00) >> 8; +} + +#if defined(USING_NEON_FP16) + SI F min_(F x, F y) { return (F)vminq_f16((float16x8_t)x, (float16x8_t)y); } + SI F max_(F x, F y) { return (F)vmaxq_f16((float16x8_t)x, (float16x8_t)y); } +#elif defined(USING_NEON) + SI F min_(F x, F y) { return (F)vminq_f32((float32x4_t)x, (float32x4_t)y); } + SI F max_(F x, F y) { return (F)vmaxq_f32((float32x4_t)x, (float32x4_t)y); } +#else + SI F min_(F x, F y) { return if_then_else(x > y, y, x); } + SI F max_(F x, F y) { return if_then_else(x < y, y, x); } +#endif + +SI F floor_(F x) { +#if N == 1 + return floorf_(x); +#elif defined(USING_NEON_FP16) + return vrndmq_f16(x); +#elif defined(__aarch64__) + return vrndmq_f32(x); +#elif defined(USING_AVX512F) + // Clang's _mm512_floor_ps() passes its mask as -1, not (__mmask16)-1, + // and integer santizer catches that this implicit cast changes the + // value from -1 to 65535. We'll cast manually to work around it. + // Read this as `return _mm512_floor_ps(x)`. + return _mm512_mask_floor_ps(x, (__mmask16)-1, x); +#elif defined(USING_AVX) + return __builtin_ia32_roundps256(x, 0x01/*_MM_FROUND_FLOOR*/); +#elif defined(__SSE4_1__) + return _mm_floor_ps(x); +#else + // Round trip through integers with a truncating cast. + F roundtrip = cast(cast(x)); + // If x is negative, truncating gives the ceiling instead of the floor. + return roundtrip - if_then_else(roundtrip > x, F1, F0); + + // This implementation fails for values of x that are outside + // the range an integer can represent. We expect most x to be small. +#endif +} + +SI F approx_log2(F x) { +#if defined(USING_NEON_FP16) + // TODO(mtklein) + return x; +#else + // The first approximation of log2(x) is its exponent 'e', minus 127. + I32 bits = bit_pun(x); + + F e = cast(bits) * (1.0f / (1<<23)); + + // If we use the mantissa too we can refine the error signficantly. + F m = bit_pun( (bits & 0x007fffff) | 0x3f000000 ); + + return e - 124.225514990f + - 1.498030302f*m + - 1.725879990f/(0.3520887068f + m); +#endif +} + +SI F approx_log(F x) { + const float ln2 = 0.69314718f; + return ln2 * approx_log2(x); +} + +SI F approx_exp2(F x) { +#if defined(USING_NEON_FP16) + // TODO(mtklein) + return x; +#else + F fract = x - floor_(x); + + F fbits = (1.0f * (1<<23)) * (x + 121.274057500f + - 1.490129070f*fract + + 27.728023300f/(4.84252568f - fract)); + I32 bits = cast(min_(max_(fbits, F0), FInfBits)); + + return bit_pun(bits); +#endif +} + +SI F approx_pow(F x, float y) { + return if_then_else((x == F0) | (x == F1), x + , approx_exp2(approx_log2(x) * y)); +} + +SI F approx_exp(F x) { + const float log2_e = 1.4426950408889634074f; + return approx_exp2(log2_e * x); +} + +// Return tf(x). +SI F apply_tf(const skcms_TransferFunction* tf, F x) { +#if defined(USING_NEON_FP16) + // TODO(mtklein) + (void)tf; + return x; +#else + // Peel off the sign bit and set x = |x|. + U32 bits = bit_pun(x), + sign = bits & 0x80000000; + x = bit_pun(bits ^ sign); + + // The transfer function has a linear part up to d, exponential at d and after. + F v = if_then_else(x < tf->d, tf->c*x + tf->f + , approx_pow(tf->a*x + tf->b, tf->g) + tf->e); + + // Tack the sign bit back on. + return bit_pun(sign | bit_pun(v)); +#endif +} + +SI F apply_pq(const skcms_TransferFunction* tf, F x) { +#if defined(USING_NEON_FP16) + // TODO(mtklein) + (void)tf; + return x; +#else + U32 bits = bit_pun(x), + sign = bits & 0x80000000; + x = bit_pun(bits ^ sign); + + F v = approx_pow(max_(tf->a + tf->b * approx_pow(x, tf->c), F0) + / (tf->d + tf->e * approx_pow(x, tf->c)), + tf->f); + + return bit_pun(sign | bit_pun(v)); +#endif +} + +SI F apply_hlg(const skcms_TransferFunction* tf, F x) { +#if defined(USING_NEON_FP16) + // TODO(mtklein) + (void)tf; + return x; +#else + const float R = tf->a, G = tf->b, + a = tf->c, b = tf->d, c = tf->e, + K = tf->f + 1; + U32 bits = bit_pun(x), + sign = bits & 0x80000000; + x = bit_pun(bits ^ sign); + + F v = if_then_else(x*R <= 1, approx_pow(x*R, G) + , approx_exp((x-c)*a) + b); + + return K*bit_pun(sign | bit_pun(v)); +#endif +} + +SI F apply_hlginv(const skcms_TransferFunction* tf, F x) { +#if defined(USING_NEON_FP16) + // TODO(mtklein) + (void)tf; + return x; +#else + const float R = tf->a, G = tf->b, + a = tf->c, b = tf->d, c = tf->e, + K = tf->f + 1; + U32 bits = bit_pun(x), + sign = bits & 0x80000000; + x = bit_pun(bits ^ sign); + x /= K; + + F v = if_then_else(x <= 1, R * approx_pow(x, G) + , a * approx_log(x - b) + c); + + return bit_pun(sign | bit_pun(v)); +#endif +} + + +// Strided loads and stores of N values, starting from p. +template +SI T load_3(const P* p) { +#if N == 1 + return (T)p[0]; +#elif N == 4 + return T{p[ 0],p[ 3],p[ 6],p[ 9]}; +#elif N == 8 + return T{p[ 0],p[ 3],p[ 6],p[ 9], p[12],p[15],p[18],p[21]}; +#elif N == 16 + return T{p[ 0],p[ 3],p[ 6],p[ 9], p[12],p[15],p[18],p[21], + p[24],p[27],p[30],p[33], p[36],p[39],p[42],p[45]}; +#endif +} + +template +SI T load_4(const P* p) { +#if N == 1 + return (T)p[0]; +#elif N == 4 + return T{p[ 0],p[ 4],p[ 8],p[12]}; +#elif N == 8 + return T{p[ 0],p[ 4],p[ 8],p[12], p[16],p[20],p[24],p[28]}; +#elif N == 16 + return T{p[ 0],p[ 4],p[ 8],p[12], p[16],p[20],p[24],p[28], + p[32],p[36],p[40],p[44], p[48],p[52],p[56],p[60]}; +#endif +} + +template +SI void store_3(P* p, const T& v) { +#if N == 1 + p[0] = v; +#elif N == 4 + p[ 0] = v[ 0]; p[ 3] = v[ 1]; p[ 6] = v[ 2]; p[ 9] = v[ 3]; +#elif N == 8 + p[ 0] = v[ 0]; p[ 3] = v[ 1]; p[ 6] = v[ 2]; p[ 9] = v[ 3]; + p[12] = v[ 4]; p[15] = v[ 5]; p[18] = v[ 6]; p[21] = v[ 7]; +#elif N == 16 + p[ 0] = v[ 0]; p[ 3] = v[ 1]; p[ 6] = v[ 2]; p[ 9] = v[ 3]; + p[12] = v[ 4]; p[15] = v[ 5]; p[18] = v[ 6]; p[21] = v[ 7]; + p[24] = v[ 8]; p[27] = v[ 9]; p[30] = v[10]; p[33] = v[11]; + p[36] = v[12]; p[39] = v[13]; p[42] = v[14]; p[45] = v[15]; +#endif +} + +template +SI void store_4(P* p, const T& v) { +#if N == 1 + p[0] = v; +#elif N == 4 + p[ 0] = v[ 0]; p[ 4] = v[ 1]; p[ 8] = v[ 2]; p[12] = v[ 3]; +#elif N == 8 + p[ 0] = v[ 0]; p[ 4] = v[ 1]; p[ 8] = v[ 2]; p[12] = v[ 3]; + p[16] = v[ 4]; p[20] = v[ 5]; p[24] = v[ 6]; p[28] = v[ 7]; +#elif N == 16 + p[ 0] = v[ 0]; p[ 4] = v[ 1]; p[ 8] = v[ 2]; p[12] = v[ 3]; + p[16] = v[ 4]; p[20] = v[ 5]; p[24] = v[ 6]; p[28] = v[ 7]; + p[32] = v[ 8]; p[36] = v[ 9]; p[40] = v[10]; p[44] = v[11]; + p[48] = v[12]; p[52] = v[13]; p[56] = v[14]; p[60] = v[15]; +#endif +} + + +SI U8 gather_8(const uint8_t* p, I32 ix) { +#if N == 1 + U8 v = p[ix]; +#elif N == 4 + U8 v = { p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]] }; +#elif N == 8 + U8 v = { p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]], + p[ix[4]], p[ix[5]], p[ix[6]], p[ix[7]] }; +#elif N == 16 + U8 v = { p[ix[ 0]], p[ix[ 1]], p[ix[ 2]], p[ix[ 3]], + p[ix[ 4]], p[ix[ 5]], p[ix[ 6]], p[ix[ 7]], + p[ix[ 8]], p[ix[ 9]], p[ix[10]], p[ix[11]], + p[ix[12]], p[ix[13]], p[ix[14]], p[ix[15]] }; +#endif + return v; +} + +SI U16 gather_16(const uint8_t* p, I32 ix) { + // Load the i'th 16-bit value from p. + auto load_16 = [p](int i) { + return load(p + 2*i); + }; +#if N == 1 + U16 v = load_16(ix); +#elif N == 4 + U16 v = { load_16(ix[0]), load_16(ix[1]), load_16(ix[2]), load_16(ix[3]) }; +#elif N == 8 + U16 v = { load_16(ix[0]), load_16(ix[1]), load_16(ix[2]), load_16(ix[3]), + load_16(ix[4]), load_16(ix[5]), load_16(ix[6]), load_16(ix[7]) }; +#elif N == 16 + U16 v = { load_16(ix[ 0]), load_16(ix[ 1]), load_16(ix[ 2]), load_16(ix[ 3]), + load_16(ix[ 4]), load_16(ix[ 5]), load_16(ix[ 6]), load_16(ix[ 7]), + load_16(ix[ 8]), load_16(ix[ 9]), load_16(ix[10]), load_16(ix[11]), + load_16(ix[12]), load_16(ix[13]), load_16(ix[14]), load_16(ix[15]) }; +#endif + return v; +} + +SI U32 gather_32(const uint8_t* p, I32 ix) { + // Load the i'th 32-bit value from p. + auto load_32 = [p](int i) { + return load(p + 4*i); + }; +#if N == 1 + U32 v = load_32(ix); +#elif N == 4 + U32 v = { load_32(ix[0]), load_32(ix[1]), load_32(ix[2]), load_32(ix[3]) }; +#elif N == 8 + U32 v = { load_32(ix[0]), load_32(ix[1]), load_32(ix[2]), load_32(ix[3]), + load_32(ix[4]), load_32(ix[5]), load_32(ix[6]), load_32(ix[7]) }; +#elif N == 16 + U32 v = { load_32(ix[ 0]), load_32(ix[ 1]), load_32(ix[ 2]), load_32(ix[ 3]), + load_32(ix[ 4]), load_32(ix[ 5]), load_32(ix[ 6]), load_32(ix[ 7]), + load_32(ix[ 8]), load_32(ix[ 9]), load_32(ix[10]), load_32(ix[11]), + load_32(ix[12]), load_32(ix[13]), load_32(ix[14]), load_32(ix[15]) }; +#endif + // TODO: AVX2 and AVX-512 gathers (c.f. gather_24). + return v; +} + +SI U32 gather_24(const uint8_t* p, I32 ix) { + // First, back up a byte. Any place we're gathering from has a safe junk byte to read + // in front of it, either a previous table value, or some tag metadata. + p -= 1; + + // Load the i'th 24-bit value from p, and 1 extra byte. + auto load_24_32 = [p](int i) { + return load(p + 3*i); + }; + + // Now load multiples of 4 bytes (a junk byte, then r,g,b). +#if N == 1 + U32 v = load_24_32(ix); +#elif N == 4 + U32 v = { load_24_32(ix[0]), load_24_32(ix[1]), load_24_32(ix[2]), load_24_32(ix[3]) }; +#elif N == 8 && !defined(USING_AVX2) + U32 v = { load_24_32(ix[0]), load_24_32(ix[1]), load_24_32(ix[2]), load_24_32(ix[3]), + load_24_32(ix[4]), load_24_32(ix[5]), load_24_32(ix[6]), load_24_32(ix[7]) }; +#elif N == 8 + (void)load_24_32; + // The gather instruction here doesn't need any particular alignment, + // but the intrinsic takes a const int*. + const int* p4 = bit_pun(p); + I32 zero = { 0, 0, 0, 0, 0, 0, 0, 0}, + mask = {-1,-1,-1,-1, -1,-1,-1,-1}; + #if defined(__clang__) + U32 v = (U32)__builtin_ia32_gatherd_d256(zero, p4, 3*ix, mask, 1); + #elif defined(__GNUC__) + U32 v = (U32)__builtin_ia32_gathersiv8si(zero, p4, 3*ix, mask, 1); + #endif +#elif N == 16 + (void)load_24_32; + // The intrinsic is supposed to take const void* now, but it takes const int*, just like AVX2. + // And AVX-512 swapped the order of arguments. :/ + const int* p4 = bit_pun(p); + U32 v = (U32)_mm512_i32gather_epi32((__m512i)(3*ix), p4, 1); +#endif + + // Shift off the junk byte, leaving r,g,b in low 24 bits (and zero in the top 8). + return v >> 8; +} + +#if !defined(__arm__) + SI void gather_48(const uint8_t* p, I32 ix, U64* v) { + // As in gather_24(), with everything doubled. + p -= 2; + + // Load the i'th 48-bit value from p, and 2 extra bytes. + auto load_48_64 = [p](int i) { + return load(p + 6*i); + }; + + #if N == 1 + *v = load_48_64(ix); + #elif N == 4 + *v = U64{ + load_48_64(ix[0]), load_48_64(ix[1]), load_48_64(ix[2]), load_48_64(ix[3]), + }; + #elif N == 8 && !defined(USING_AVX2) + *v = U64{ + load_48_64(ix[0]), load_48_64(ix[1]), load_48_64(ix[2]), load_48_64(ix[3]), + load_48_64(ix[4]), load_48_64(ix[5]), load_48_64(ix[6]), load_48_64(ix[7]), + }; + #elif N == 8 + (void)load_48_64; + typedef int32_t __attribute__((vector_size(16))) Half_I32; + typedef long long __attribute__((vector_size(32))) Half_I64; + + // The gather instruction here doesn't need any particular alignment, + // but the intrinsic takes a const long long*. + const long long int* p8 = bit_pun(p); + + Half_I64 zero = { 0, 0, 0, 0}, + mask = {-1,-1,-1,-1}; + + ix *= 6; + Half_I32 ix_lo = { ix[0], ix[1], ix[2], ix[3] }, + ix_hi = { ix[4], ix[5], ix[6], ix[7] }; + + #if defined(__clang__) + Half_I64 lo = (Half_I64)__builtin_ia32_gatherd_q256(zero, p8, ix_lo, mask, 1), + hi = (Half_I64)__builtin_ia32_gatherd_q256(zero, p8, ix_hi, mask, 1); + #elif defined(__GNUC__) + Half_I64 lo = (Half_I64)__builtin_ia32_gathersiv4di(zero, p8, ix_lo, mask, 1), + hi = (Half_I64)__builtin_ia32_gathersiv4di(zero, p8, ix_hi, mask, 1); + #endif + store((char*)v + 0, lo); + store((char*)v + 32, hi); + #elif N == 16 + (void)load_48_64; + const long long int* p8 = bit_pun(p); + __m512i lo = _mm512_i32gather_epi64(_mm512_extracti32x8_epi32((__m512i)(6*ix), 0), p8, 1), + hi = _mm512_i32gather_epi64(_mm512_extracti32x8_epi32((__m512i)(6*ix), 1), p8, 1); + store((char*)v + 0, lo); + store((char*)v + 64, hi); + #endif + + *v >>= 16; + } +#endif + +SI F F_from_U8(U8 v) { + return cast(v) * (1/255.0f); +} + +SI F F_from_U16_BE(U16 v) { + // All 16-bit ICC values are big-endian, so we byte swap before converting to float. + // MSVC catches the "loss" of data here in the portable path, so we also make sure to mask. + U16 lo = (v >> 8), + hi = (v << 8) & 0xffff; + return cast(lo|hi) * (1/65535.0f); +} + +SI U16 U16_from_F(F v) { + // 65535 == inf in FP16, so promote to FP32 before converting. + return cast(cast>(v) * 65535 + 0.5f); +} + +SI F minus_1_ulp(F v) { +#if defined(USING_NEON_FP16) + return bit_pun( bit_pun(v) - 1 ); +#else + return bit_pun( bit_pun(v) - 1 ); +#endif +} + +SI F table(const skcms_Curve* curve, F v) { + // Clamp the input to [0,1], then scale to a table index. + F ix = max_(F0, min_(v, F1)) * (float)(curve->table_entries - 1); + + // We'll look up (equal or adjacent) entries at lo and hi, then lerp by t between the two. + I32 lo = cast( ix ), + hi = cast(minus_1_ulp(ix+1.0f)); + F t = ix - cast(lo); // i.e. the fractional part of ix. + + // TODO: can we load l and h simultaneously? Each entry in 'h' is either + // the same as in 'l' or adjacent. We have a rough idea that's it'd always be safe + // to read adjacent entries and perhaps underflow the table by a byte or two + // (it'd be junk, but always safe to read). Not sure how to lerp yet. + F l,h; + if (curve->table_8) { + l = F_from_U8(gather_8(curve->table_8, lo)); + h = F_from_U8(gather_8(curve->table_8, hi)); + } else { + l = F_from_U16_BE(gather_16(curve->table_16, lo)); + h = F_from_U16_BE(gather_16(curve->table_16, hi)); + } + return l + (h-l)*t; +} + +SI void sample_clut_8(const uint8_t* grid_8, I32 ix, F* r, F* g, F* b) { + U32 rgb = gather_24(grid_8, ix); + + *r = cast((rgb >> 0) & 0xff) * (1/255.0f); + *g = cast((rgb >> 8) & 0xff) * (1/255.0f); + *b = cast((rgb >> 16) & 0xff) * (1/255.0f); +} + +SI void sample_clut_8(const uint8_t* grid_8, I32 ix, F* r, F* g, F* b, F* a) { + // TODO: don't forget to optimize gather_32(). + U32 rgba = gather_32(grid_8, ix); + + *r = cast((rgba >> 0) & 0xff) * (1/255.0f); + *g = cast((rgba >> 8) & 0xff) * (1/255.0f); + *b = cast((rgba >> 16) & 0xff) * (1/255.0f); + *a = cast((rgba >> 24) & 0xff) * (1/255.0f); +} + +SI void sample_clut_16(const uint8_t* grid_16, I32 ix, F* r, F* g, F* b) { +#if defined(__arm__) + // This is up to 2x faster on 32-bit ARM than the #else-case fast path. + *r = F_from_U16_BE(gather_16(grid_16, 3*ix+0)); + *g = F_from_U16_BE(gather_16(grid_16, 3*ix+1)); + *b = F_from_U16_BE(gather_16(grid_16, 3*ix+2)); +#else + // This strategy is much faster for 64-bit builds, and fine for 32-bit x86 too. + U64 rgb; + gather_48(grid_16, ix, &rgb); + rgb = swap_endian_16x4(rgb); + + *r = cast((rgb >> 0) & 0xffff) * (1/65535.0f); + *g = cast((rgb >> 16) & 0xffff) * (1/65535.0f); + *b = cast((rgb >> 32) & 0xffff) * (1/65535.0f); +#endif +} + +SI void sample_clut_16(const uint8_t* grid_16, I32 ix, F* r, F* g, F* b, F* a) { + // TODO: gather_64()-based fast path? + *r = F_from_U16_BE(gather_16(grid_16, 4*ix+0)); + *g = F_from_U16_BE(gather_16(grid_16, 4*ix+1)); + *b = F_from_U16_BE(gather_16(grid_16, 4*ix+2)); + *a = F_from_U16_BE(gather_16(grid_16, 4*ix+3)); +} + +static void clut(uint32_t input_channels, uint32_t output_channels, + const uint8_t grid_points[4], const uint8_t* grid_8, const uint8_t* grid_16, + F* r, F* g, F* b, F* a) { + + const int dim = (int)input_channels; + assert (0 < dim && dim <= 4); + assert (output_channels == 3 || + output_channels == 4); + + // For each of these arrays, think foo[2*dim], but we use foo[8] since we know dim <= 4. + I32 index [8]; // Index contribution by dimension, first low from 0, then high from 4. + F weight[8]; // Weight for each contribution, again first low, then high. + + // O(dim) work first: calculate index,weight from r,g,b,a. + const F inputs[] = { *r,*g,*b,*a }; + for (int i = dim-1, stride = 1; i >= 0; i--) { + // x is where we logically want to sample the grid in the i-th dimension. + F x = inputs[i] * (float)(grid_points[i] - 1); + + // But we can't index at floats. lo and hi are the two integer grid points surrounding x. + I32 lo = cast( x ), // i.e. trunc(x) == floor(x) here. + hi = cast(minus_1_ulp(x+1.0f)); + // Notice how we fold in the accumulated stride across previous dimensions here. + index[i+0] = lo * stride; + index[i+4] = hi * stride; + stride *= grid_points[i]; + + // We'll interpolate between those two integer grid points by t. + F t = x - cast(lo); // i.e. fract(x) + weight[i+0] = 1-t; + weight[i+4] = t; + } + + *r = *g = *b = F0; + if (output_channels == 4) { + *a = F0; + } + + // We'll sample 2^dim == 1<input_channels, a2b->output_channels, + a2b->grid_points, a2b->grid_8, a2b->grid_16, + r,g,b,&a); +} +static void clut(const skcms_B2A* b2a, F* r, F* g, F* b, F* a) { + clut(b2a->input_channels, b2a->output_channels, + b2a->grid_points, b2a->grid_8, b2a->grid_16, + r,g,b,a); +} + +static void exec_ops(const Op* ops, const void** args, + const char* src, char* dst, int i) { + F r = F0, g = F0, b = F0, a = F1; + while (true) { + switch (*ops++) { + case Op_load_a8:{ + a = F_from_U8(load(src + 1*i)); + } break; + + case Op_load_g8:{ + r = g = b = F_from_U8(load(src + 1*i)); + } break; + + case Op_load_4444:{ + U16 abgr = load(src + 2*i); + + r = cast((abgr >> 12) & 0xf) * (1/15.0f); + g = cast((abgr >> 8) & 0xf) * (1/15.0f); + b = cast((abgr >> 4) & 0xf) * (1/15.0f); + a = cast((abgr >> 0) & 0xf) * (1/15.0f); + } break; + + case Op_load_565:{ + U16 rgb = load(src + 2*i); + + r = cast(rgb & (uint16_t)(31<< 0)) * (1.0f / (31<< 0)); + g = cast(rgb & (uint16_t)(63<< 5)) * (1.0f / (63<< 5)); + b = cast(rgb & (uint16_t)(31<<11)) * (1.0f / (31<<11)); + } break; + + case Op_load_888:{ + const uint8_t* rgb = (const uint8_t*)(src + 3*i); + #if defined(USING_NEON_FP16) + // See the explanation under USING_NEON below. This is that doubled up. + uint8x16x3_t v = {{ vdupq_n_u8(0), vdupq_n_u8(0), vdupq_n_u8(0) }}; + v = vld3q_lane_u8(rgb+ 0, v, 0); + v = vld3q_lane_u8(rgb+ 3, v, 2); + v = vld3q_lane_u8(rgb+ 6, v, 4); + v = vld3q_lane_u8(rgb+ 9, v, 6); + + v = vld3q_lane_u8(rgb+12, v, 8); + v = vld3q_lane_u8(rgb+15, v, 10); + v = vld3q_lane_u8(rgb+18, v, 12); + v = vld3q_lane_u8(rgb+21, v, 14); + + r = cast((U16)v.val[0]) * (1/255.0f); + g = cast((U16)v.val[1]) * (1/255.0f); + b = cast((U16)v.val[2]) * (1/255.0f); + #elif defined(USING_NEON) + // There's no uint8x4x3_t or vld3 load for it, so we'll load each rgb pixel one at + // a time. Since we're doing that, we might as well load them into 16-bit lanes. + // (We'd even load into 32-bit lanes, but that's not possible on ARMv7.) + uint8x8x3_t v = {{ vdup_n_u8(0), vdup_n_u8(0), vdup_n_u8(0) }}; + v = vld3_lane_u8(rgb+0, v, 0); + v = vld3_lane_u8(rgb+3, v, 2); + v = vld3_lane_u8(rgb+6, v, 4); + v = vld3_lane_u8(rgb+9, v, 6); + + // Now if we squint, those 3 uint8x8_t we constructed are really U16s, easy to + // convert to F. (Again, U32 would be even better here if drop ARMv7 or split + // ARMv7 and ARMv8 impls.) + r = cast((U16)v.val[0]) * (1/255.0f); + g = cast((U16)v.val[1]) * (1/255.0f); + b = cast((U16)v.val[2]) * (1/255.0f); + #else + r = cast(load_3(rgb+0) ) * (1/255.0f); + g = cast(load_3(rgb+1) ) * (1/255.0f); + b = cast(load_3(rgb+2) ) * (1/255.0f); + #endif + } break; + + case Op_load_8888:{ + U32 rgba = load(src + 4*i); + + r = cast((rgba >> 0) & 0xff) * (1/255.0f); + g = cast((rgba >> 8) & 0xff) * (1/255.0f); + b = cast((rgba >> 16) & 0xff) * (1/255.0f); + a = cast((rgba >> 24) & 0xff) * (1/255.0f); + } break; + + case Op_load_8888_palette8:{ + const uint8_t* palette = (const uint8_t*) *args++; + I32 ix = cast(load(src + 1*i)); + U32 rgba = gather_32(palette, ix); + + r = cast((rgba >> 0) & 0xff) * (1/255.0f); + g = cast((rgba >> 8) & 0xff) * (1/255.0f); + b = cast((rgba >> 16) & 0xff) * (1/255.0f); + a = cast((rgba >> 24) & 0xff) * (1/255.0f); + } break; + + case Op_load_1010102:{ + U32 rgba = load(src + 4*i); + + r = cast((rgba >> 0) & 0x3ff) * (1/1023.0f); + g = cast((rgba >> 10) & 0x3ff) * (1/1023.0f); + b = cast((rgba >> 20) & 0x3ff) * (1/1023.0f); + a = cast((rgba >> 30) & 0x3 ) * (1/ 3.0f); + } break; + + case Op_load_101010x_XR:{ + static constexpr float min = -0.752941f; + static constexpr float max = 1.25098f; + static constexpr float range = max - min; + U32 rgba = load(src + 4*i); + r = cast((rgba >> 0) & 0x3ff) * (1/1023.0f) * range + min; + g = cast((rgba >> 10) & 0x3ff) * (1/1023.0f) * range + min; + b = cast((rgba >> 20) & 0x3ff) * (1/1023.0f) * range + min; + } break; + + case Op_load_161616LE:{ + uintptr_t ptr = (uintptr_t)(src + 6*i); + assert( (ptr & 1) == 0 ); // src must be 2-byte aligned for this + const uint16_t* rgb = (const uint16_t*)ptr; // cast to const uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x3_t v = vld3q_u16(rgb); + r = cast((U16)v.val[0]) * (1/65535.0f); + g = cast((U16)v.val[1]) * (1/65535.0f); + b = cast((U16)v.val[2]) * (1/65535.0f); + #elif defined(USING_NEON) + uint16x4x3_t v = vld3_u16(rgb); + r = cast((U16)v.val[0]) * (1/65535.0f); + g = cast((U16)v.val[1]) * (1/65535.0f); + b = cast((U16)v.val[2]) * (1/65535.0f); + #else + r = cast(load_3(rgb+0)) * (1/65535.0f); + g = cast(load_3(rgb+1)) * (1/65535.0f); + b = cast(load_3(rgb+2)) * (1/65535.0f); + #endif + } break; + + case Op_load_16161616LE:{ + uintptr_t ptr = (uintptr_t)(src + 8*i); + assert( (ptr & 1) == 0 ); // src must be 2-byte aligned for this + const uint16_t* rgba = (const uint16_t*)ptr; // cast to const uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x4_t v = vld4q_u16(rgba); + r = cast((U16)v.val[0]) * (1/65535.0f); + g = cast((U16)v.val[1]) * (1/65535.0f); + b = cast((U16)v.val[2]) * (1/65535.0f); + a = cast((U16)v.val[3]) * (1/65535.0f); + #elif defined(USING_NEON) + uint16x4x4_t v = vld4_u16(rgba); + r = cast((U16)v.val[0]) * (1/65535.0f); + g = cast((U16)v.val[1]) * (1/65535.0f); + b = cast((U16)v.val[2]) * (1/65535.0f); + a = cast((U16)v.val[3]) * (1/65535.0f); + #else + U64 px = load(rgba); + + r = cast((px >> 0) & 0xffff) * (1/65535.0f); + g = cast((px >> 16) & 0xffff) * (1/65535.0f); + b = cast((px >> 32) & 0xffff) * (1/65535.0f); + a = cast((px >> 48) & 0xffff) * (1/65535.0f); + #endif + } break; + + case Op_load_161616BE:{ + uintptr_t ptr = (uintptr_t)(src + 6*i); + assert( (ptr & 1) == 0 ); // src must be 2-byte aligned for this + const uint16_t* rgb = (const uint16_t*)ptr; // cast to const uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x3_t v = vld3q_u16(rgb); + r = cast(swap_endian_16((U16)v.val[0])) * (1/65535.0f); + g = cast(swap_endian_16((U16)v.val[1])) * (1/65535.0f); + b = cast(swap_endian_16((U16)v.val[2])) * (1/65535.0f); + #elif defined(USING_NEON) + uint16x4x3_t v = vld3_u16(rgb); + r = cast(swap_endian_16((U16)v.val[0])) * (1/65535.0f); + g = cast(swap_endian_16((U16)v.val[1])) * (1/65535.0f); + b = cast(swap_endian_16((U16)v.val[2])) * (1/65535.0f); + #else + U32 R = load_3(rgb+0), + G = load_3(rgb+1), + B = load_3(rgb+2); + // R,G,B are big-endian 16-bit, so byte swap them before converting to float. + r = cast((R & 0x00ff)<<8 | (R & 0xff00)>>8) * (1/65535.0f); + g = cast((G & 0x00ff)<<8 | (G & 0xff00)>>8) * (1/65535.0f); + b = cast((B & 0x00ff)<<8 | (B & 0xff00)>>8) * (1/65535.0f); + #endif + } break; + + case Op_load_16161616BE:{ + uintptr_t ptr = (uintptr_t)(src + 8*i); + assert( (ptr & 1) == 0 ); // src must be 2-byte aligned for this + const uint16_t* rgba = (const uint16_t*)ptr; // cast to const uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x4_t v = vld4q_u16(rgba); + r = cast(swap_endian_16((U16)v.val[0])) * (1/65535.0f); + g = cast(swap_endian_16((U16)v.val[1])) * (1/65535.0f); + b = cast(swap_endian_16((U16)v.val[2])) * (1/65535.0f); + a = cast(swap_endian_16((U16)v.val[3])) * (1/65535.0f); + #elif defined(USING_NEON) + uint16x4x4_t v = vld4_u16(rgba); + r = cast(swap_endian_16((U16)v.val[0])) * (1/65535.0f); + g = cast(swap_endian_16((U16)v.val[1])) * (1/65535.0f); + b = cast(swap_endian_16((U16)v.val[2])) * (1/65535.0f); + a = cast(swap_endian_16((U16)v.val[3])) * (1/65535.0f); + #else + U64 px = swap_endian_16x4(load(rgba)); + + r = cast((px >> 0) & 0xffff) * (1/65535.0f); + g = cast((px >> 16) & 0xffff) * (1/65535.0f); + b = cast((px >> 32) & 0xffff) * (1/65535.0f); + a = cast((px >> 48) & 0xffff) * (1/65535.0f); + #endif + } break; + + case Op_load_hhh:{ + uintptr_t ptr = (uintptr_t)(src + 6*i); + assert( (ptr & 1) == 0 ); // src must be 2-byte aligned for this + const uint16_t* rgb = (const uint16_t*)ptr; // cast to const uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x3_t v = vld3q_u16(rgb); + U16 R = (U16)v.val[0], + G = (U16)v.val[1], + B = (U16)v.val[2]; + #elif defined(USING_NEON) + uint16x4x3_t v = vld3_u16(rgb); + U16 R = (U16)v.val[0], + G = (U16)v.val[1], + B = (U16)v.val[2]; + #else + U16 R = load_3(rgb+0), + G = load_3(rgb+1), + B = load_3(rgb+2); + #endif + r = F_from_Half(R); + g = F_from_Half(G); + b = F_from_Half(B); + } break; + + case Op_load_hhhh:{ + uintptr_t ptr = (uintptr_t)(src + 8*i); + assert( (ptr & 1) == 0 ); // src must be 2-byte aligned for this + const uint16_t* rgba = (const uint16_t*)ptr; // cast to const uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x4_t v = vld4q_u16(rgba); + U16 R = (U16)v.val[0], + G = (U16)v.val[1], + B = (U16)v.val[2], + A = (U16)v.val[3]; + #elif defined(USING_NEON) + uint16x4x4_t v = vld4_u16(rgba); + U16 R = (U16)v.val[0], + G = (U16)v.val[1], + B = (U16)v.val[2], + A = (U16)v.val[3]; + #else + U64 px = load(rgba); + U16 R = cast((px >> 0) & 0xffff), + G = cast((px >> 16) & 0xffff), + B = cast((px >> 32) & 0xffff), + A = cast((px >> 48) & 0xffff); + #endif + r = F_from_Half(R); + g = F_from_Half(G); + b = F_from_Half(B); + a = F_from_Half(A); + } break; + + case Op_load_fff:{ + uintptr_t ptr = (uintptr_t)(src + 12*i); + assert( (ptr & 3) == 0 ); // src must be 4-byte aligned for this + const float* rgb = (const float*)ptr; // cast to const float* to be safe. + #if defined(USING_NEON_FP16) + float32x4x3_t lo = vld3q_f32(rgb + 0), + hi = vld3q_f32(rgb + 12); + r = (F)vcombine_f16(vcvt_f16_f32(lo.val[0]), vcvt_f16_f32(hi.val[0])); + g = (F)vcombine_f16(vcvt_f16_f32(lo.val[1]), vcvt_f16_f32(hi.val[1])); + b = (F)vcombine_f16(vcvt_f16_f32(lo.val[2]), vcvt_f16_f32(hi.val[2])); + #elif defined(USING_NEON) + float32x4x3_t v = vld3q_f32(rgb); + r = (F)v.val[0]; + g = (F)v.val[1]; + b = (F)v.val[2]; + #else + r = load_3(rgb+0); + g = load_3(rgb+1); + b = load_3(rgb+2); + #endif + } break; + + case Op_load_ffff:{ + uintptr_t ptr = (uintptr_t)(src + 16*i); + assert( (ptr & 3) == 0 ); // src must be 4-byte aligned for this + const float* rgba = (const float*)ptr; // cast to const float* to be safe. + #if defined(USING_NEON_FP16) + float32x4x4_t lo = vld4q_f32(rgba + 0), + hi = vld4q_f32(rgba + 16); + r = (F)vcombine_f16(vcvt_f16_f32(lo.val[0]), vcvt_f16_f32(hi.val[0])); + g = (F)vcombine_f16(vcvt_f16_f32(lo.val[1]), vcvt_f16_f32(hi.val[1])); + b = (F)vcombine_f16(vcvt_f16_f32(lo.val[2]), vcvt_f16_f32(hi.val[2])); + a = (F)vcombine_f16(vcvt_f16_f32(lo.val[3]), vcvt_f16_f32(hi.val[3])); + #elif defined(USING_NEON) + float32x4x4_t v = vld4q_f32(rgba); + r = (F)v.val[0]; + g = (F)v.val[1]; + b = (F)v.val[2]; + a = (F)v.val[3]; + #else + r = load_4(rgba+0); + g = load_4(rgba+1); + b = load_4(rgba+2); + a = load_4(rgba+3); + #endif + } break; + + case Op_swap_rb:{ + F t = r; + r = b; + b = t; + } break; + + case Op_clamp:{ + r = max_(F0, min_(r, F1)); + g = max_(F0, min_(g, F1)); + b = max_(F0, min_(b, F1)); + a = max_(F0, min_(a, F1)); + } break; + + case Op_invert:{ + r = F1 - r; + g = F1 - g; + b = F1 - b; + a = F1 - a; + } break; + + case Op_force_opaque:{ + a = F1; + } break; + + case Op_premul:{ + r *= a; + g *= a; + b *= a; + } break; + + case Op_unpremul:{ + F scale = if_then_else(F1 / a < INFINITY_, F1 / a, F0); + r *= scale; + g *= scale; + b *= scale; + } break; + + case Op_matrix_3x3:{ + const skcms_Matrix3x3* matrix = (const skcms_Matrix3x3*) *args++; + const float* m = &matrix->vals[0][0]; + + F R = m[0]*r + m[1]*g + m[2]*b, + G = m[3]*r + m[4]*g + m[5]*b, + B = m[6]*r + m[7]*g + m[8]*b; + + r = R; + g = G; + b = B; + } break; + + case Op_matrix_3x4:{ + const skcms_Matrix3x4* matrix = (const skcms_Matrix3x4*) *args++; + const float* m = &matrix->vals[0][0]; + + F R = m[0]*r + m[1]*g + m[ 2]*b + m[ 3], + G = m[4]*r + m[5]*g + m[ 6]*b + m[ 7], + B = m[8]*r + m[9]*g + m[10]*b + m[11]; + + r = R; + g = G; + b = B; + } break; + + case Op_lab_to_xyz:{ + // The L*a*b values are in r,g,b, but normalized to [0,1]. Reconstruct them: + F L = r * 100.0f, + A = g * 255.0f - 128.0f, + B = b * 255.0f - 128.0f; + + // Convert to CIE XYZ. + F Y = (L + 16.0f) * (1/116.0f), + X = Y + A*(1/500.0f), + Z = Y - B*(1/200.0f); + + X = if_then_else(X*X*X > 0.008856f, X*X*X, (X - (16/116.0f)) * (1/7.787f)); + Y = if_then_else(Y*Y*Y > 0.008856f, Y*Y*Y, (Y - (16/116.0f)) * (1/7.787f)); + Z = if_then_else(Z*Z*Z > 0.008856f, Z*Z*Z, (Z - (16/116.0f)) * (1/7.787f)); + + // Adjust to XYZD50 illuminant, and stuff back into r,g,b for the next op. + r = X * 0.9642f; + g = Y ; + b = Z * 0.8249f; + } break; + + // As above, in reverse. + case Op_xyz_to_lab:{ + F X = r * (1/0.9642f), + Y = g, + Z = b * (1/0.8249f); + + X = if_then_else(X > 0.008856f, approx_pow(X, 1/3.0f), X*7.787f + (16/116.0f)); + Y = if_then_else(Y > 0.008856f, approx_pow(Y, 1/3.0f), Y*7.787f + (16/116.0f)); + Z = if_then_else(Z > 0.008856f, approx_pow(Z, 1/3.0f), Z*7.787f + (16/116.0f)); + + F L = Y*116.0f - 16.0f, + A = (X-Y)*500.0f, + B = (Y-Z)*200.0f; + + r = L * (1/100.f); + g = (A + 128.0f) * (1/255.0f); + b = (B + 128.0f) * (1/255.0f); + } break; + + case Op_tf_r:{ r = apply_tf((const skcms_TransferFunction*)*args++, r); } break; + case Op_tf_g:{ g = apply_tf((const skcms_TransferFunction*)*args++, g); } break; + case Op_tf_b:{ b = apply_tf((const skcms_TransferFunction*)*args++, b); } break; + case Op_tf_a:{ a = apply_tf((const skcms_TransferFunction*)*args++, a); } break; + + case Op_pq_r:{ r = apply_pq((const skcms_TransferFunction*)*args++, r); } break; + case Op_pq_g:{ g = apply_pq((const skcms_TransferFunction*)*args++, g); } break; + case Op_pq_b:{ b = apply_pq((const skcms_TransferFunction*)*args++, b); } break; + case Op_pq_a:{ a = apply_pq((const skcms_TransferFunction*)*args++, a); } break; + + case Op_hlg_r:{ r = apply_hlg((const skcms_TransferFunction*)*args++, r); } break; + case Op_hlg_g:{ g = apply_hlg((const skcms_TransferFunction*)*args++, g); } break; + case Op_hlg_b:{ b = apply_hlg((const skcms_TransferFunction*)*args++, b); } break; + case Op_hlg_a:{ a = apply_hlg((const skcms_TransferFunction*)*args++, a); } break; + + case Op_hlginv_r:{ r = apply_hlginv((const skcms_TransferFunction*)*args++, r); } break; + case Op_hlginv_g:{ g = apply_hlginv((const skcms_TransferFunction*)*args++, g); } break; + case Op_hlginv_b:{ b = apply_hlginv((const skcms_TransferFunction*)*args++, b); } break; + case Op_hlginv_a:{ a = apply_hlginv((const skcms_TransferFunction*)*args++, a); } break; + + case Op_table_r: { r = table((const skcms_Curve*)*args++, r); } break; + case Op_table_g: { g = table((const skcms_Curve*)*args++, g); } break; + case Op_table_b: { b = table((const skcms_Curve*)*args++, b); } break; + case Op_table_a: { a = table((const skcms_Curve*)*args++, a); } break; + + case Op_clut_A2B: { + const skcms_A2B* a2b = (const skcms_A2B*) *args++; + clut(a2b, &r,&g,&b,a); + + if (a2b->input_channels == 4) { + // CMYK is opaque. + a = F1; + } + } break; + + case Op_clut_B2A: { + const skcms_B2A* b2a = (const skcms_B2A*) *args++; + clut(b2a, &r,&g,&b,&a); + } break; + + // Notice, from here on down the store_ ops all return, ending the loop. + + case Op_store_a8: { + store(dst + 1*i, cast(to_fixed(a * 255))); + } return; + + case Op_store_g8: { + // g should be holding luminance (Y) (r,g,b ~~~> X,Y,Z) + store(dst + 1*i, cast(to_fixed(g * 255))); + } return; + + case Op_store_4444: { + store(dst + 2*i, cast(to_fixed(r * 15) << 12) + | cast(to_fixed(g * 15) << 8) + | cast(to_fixed(b * 15) << 4) + | cast(to_fixed(a * 15) << 0)); + } return; + + case Op_store_565: { + store(dst + 2*i, cast(to_fixed(r * 31) << 0 ) + | cast(to_fixed(g * 63) << 5 ) + | cast(to_fixed(b * 31) << 11 )); + } return; + + case Op_store_888: { + uint8_t* rgb = (uint8_t*)dst + 3*i; + #if defined(USING_NEON_FP16) + // See the explanation under USING_NEON below. This is that doubled up. + U16 R = to_fixed(r * 255), + G = to_fixed(g * 255), + B = to_fixed(b * 255); + + uint8x16x3_t v = {{ (uint8x16_t)R, (uint8x16_t)G, (uint8x16_t)B }}; + vst3q_lane_u8(rgb+ 0, v, 0); + vst3q_lane_u8(rgb+ 3, v, 2); + vst3q_lane_u8(rgb+ 6, v, 4); + vst3q_lane_u8(rgb+ 9, v, 6); + + vst3q_lane_u8(rgb+12, v, 8); + vst3q_lane_u8(rgb+15, v, 10); + vst3q_lane_u8(rgb+18, v, 12); + vst3q_lane_u8(rgb+21, v, 14); + #elif defined(USING_NEON) + // Same deal as load_888 but in reverse... we'll store using uint8x8x3_t, but + // get there via U16 to save some instructions converting to float. And just + // like load_888, we'd prefer to go via U32 but for ARMv7 support. + U16 R = cast(to_fixed(r * 255)), + G = cast(to_fixed(g * 255)), + B = cast(to_fixed(b * 255)); + + uint8x8x3_t v = {{ (uint8x8_t)R, (uint8x8_t)G, (uint8x8_t)B }}; + vst3_lane_u8(rgb+0, v, 0); + vst3_lane_u8(rgb+3, v, 2); + vst3_lane_u8(rgb+6, v, 4); + vst3_lane_u8(rgb+9, v, 6); + #else + store_3(rgb+0, cast(to_fixed(r * 255)) ); + store_3(rgb+1, cast(to_fixed(g * 255)) ); + store_3(rgb+2, cast(to_fixed(b * 255)) ); + #endif + } return; + + case Op_store_8888: { + store(dst + 4*i, cast(to_fixed(r * 255)) << 0 + | cast(to_fixed(g * 255)) << 8 + | cast(to_fixed(b * 255)) << 16 + | cast(to_fixed(a * 255)) << 24); + } return; + + case Op_store_101010x_XR: { + static constexpr float min = -0.752941f; + static constexpr float max = 1.25098f; + static constexpr float range = max - min; + store(dst + 4*i, cast(to_fixed(((r - min) / range) * 1023)) << 0 + | cast(to_fixed(((g - min) / range) * 1023)) << 10 + | cast(to_fixed(((b - min) / range) * 1023)) << 20); + return; + } + case Op_store_1010102: { + store(dst + 4*i, cast(to_fixed(r * 1023)) << 0 + | cast(to_fixed(g * 1023)) << 10 + | cast(to_fixed(b * 1023)) << 20 + | cast(to_fixed(a * 3)) << 30); + } return; + + case Op_store_161616LE: { + uintptr_t ptr = (uintptr_t)(dst + 6*i); + assert( (ptr & 1) == 0 ); // The dst pointer must be 2-byte aligned + uint16_t* rgb = (uint16_t*)ptr; // for this cast to uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x3_t v = {{ + (uint16x8_t)U16_from_F(r), + (uint16x8_t)U16_from_F(g), + (uint16x8_t)U16_from_F(b), + }}; + vst3q_u16(rgb, v); + #elif defined(USING_NEON) + uint16x4x3_t v = {{ + (uint16x4_t)U16_from_F(r), + (uint16x4_t)U16_from_F(g), + (uint16x4_t)U16_from_F(b), + }}; + vst3_u16(rgb, v); + #else + store_3(rgb+0, U16_from_F(r)); + store_3(rgb+1, U16_from_F(g)); + store_3(rgb+2, U16_from_F(b)); + #endif + + } return; + + case Op_store_16161616LE: { + uintptr_t ptr = (uintptr_t)(dst + 8*i); + assert( (ptr & 1) == 0 ); // The dst pointer must be 2-byte aligned + uint16_t* rgba = (uint16_t*)ptr; // for this cast to uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x4_t v = {{ + (uint16x8_t)U16_from_F(r), + (uint16x8_t)U16_from_F(g), + (uint16x8_t)U16_from_F(b), + (uint16x8_t)U16_from_F(a), + }}; + vst4q_u16(rgba, v); + #elif defined(USING_NEON) + uint16x4x4_t v = {{ + (uint16x4_t)U16_from_F(r), + (uint16x4_t)U16_from_F(g), + (uint16x4_t)U16_from_F(b), + (uint16x4_t)U16_from_F(a), + }}; + vst4_u16(rgba, v); + #else + U64 px = cast(to_fixed(r * 65535)) << 0 + | cast(to_fixed(g * 65535)) << 16 + | cast(to_fixed(b * 65535)) << 32 + | cast(to_fixed(a * 65535)) << 48; + store(rgba, px); + #endif + } return; + + case Op_store_161616BE: { + uintptr_t ptr = (uintptr_t)(dst + 6*i); + assert( (ptr & 1) == 0 ); // The dst pointer must be 2-byte aligned + uint16_t* rgb = (uint16_t*)ptr; // for this cast to uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x3_t v = {{ + (uint16x8_t)swap_endian_16(U16_from_F(r)), + (uint16x8_t)swap_endian_16(U16_from_F(g)), + (uint16x8_t)swap_endian_16(U16_from_F(b)), + }}; + vst3q_u16(rgb, v); + #elif defined(USING_NEON) + uint16x4x3_t v = {{ + (uint16x4_t)swap_endian_16(cast(U16_from_F(r))), + (uint16x4_t)swap_endian_16(cast(U16_from_F(g))), + (uint16x4_t)swap_endian_16(cast(U16_from_F(b))), + }}; + vst3_u16(rgb, v); + #else + U32 R = to_fixed(r * 65535), + G = to_fixed(g * 65535), + B = to_fixed(b * 65535); + store_3(rgb+0, cast((R & 0x00ff) << 8 | (R & 0xff00) >> 8) ); + store_3(rgb+1, cast((G & 0x00ff) << 8 | (G & 0xff00) >> 8) ); + store_3(rgb+2, cast((B & 0x00ff) << 8 | (B & 0xff00) >> 8) ); + #endif + + } return; + + case Op_store_16161616BE: { + uintptr_t ptr = (uintptr_t)(dst + 8*i); + assert( (ptr & 1) == 0 ); // The dst pointer must be 2-byte aligned + uint16_t* rgba = (uint16_t*)ptr; // for this cast to uint16_t* to be safe. + #if defined(USING_NEON_FP16) + uint16x8x4_t v = {{ + (uint16x8_t)swap_endian_16(U16_from_F(r)), + (uint16x8_t)swap_endian_16(U16_from_F(g)), + (uint16x8_t)swap_endian_16(U16_from_F(b)), + (uint16x8_t)swap_endian_16(U16_from_F(a)), + }}; + vst4q_u16(rgba, v); + #elif defined(USING_NEON) + uint16x4x4_t v = {{ + (uint16x4_t)swap_endian_16(cast(U16_from_F(r))), + (uint16x4_t)swap_endian_16(cast(U16_from_F(g))), + (uint16x4_t)swap_endian_16(cast(U16_from_F(b))), + (uint16x4_t)swap_endian_16(cast(U16_from_F(a))), + }}; + vst4_u16(rgba, v); + #else + U64 px = cast(to_fixed(r * 65535)) << 0 + | cast(to_fixed(g * 65535)) << 16 + | cast(to_fixed(b * 65535)) << 32 + | cast(to_fixed(a * 65535)) << 48; + store(rgba, swap_endian_16x4(px)); + #endif + } return; + + case Op_store_hhh: { + uintptr_t ptr = (uintptr_t)(dst + 6*i); + assert( (ptr & 1) == 0 ); // The dst pointer must be 2-byte aligned + uint16_t* rgb = (uint16_t*)ptr; // for this cast to uint16_t* to be safe. + + U16 R = Half_from_F(r), + G = Half_from_F(g), + B = Half_from_F(b); + #if defined(USING_NEON_FP16) + uint16x8x3_t v = {{ + (uint16x8_t)R, + (uint16x8_t)G, + (uint16x8_t)B, + }}; + vst3q_u16(rgb, v); + #elif defined(USING_NEON) + uint16x4x3_t v = {{ + (uint16x4_t)R, + (uint16x4_t)G, + (uint16x4_t)B, + }}; + vst3_u16(rgb, v); + #else + store_3(rgb+0, R); + store_3(rgb+1, G); + store_3(rgb+2, B); + #endif + } return; + + case Op_store_hhhh: { + uintptr_t ptr = (uintptr_t)(dst + 8*i); + assert( (ptr & 1) == 0 ); // The dst pointer must be 2-byte aligned + uint16_t* rgba = (uint16_t*)ptr; // for this cast to uint16_t* to be safe. + + U16 R = Half_from_F(r), + G = Half_from_F(g), + B = Half_from_F(b), + A = Half_from_F(a); + #if defined(USING_NEON_FP16) + uint16x8x4_t v = {{ + (uint16x8_t)R, + (uint16x8_t)G, + (uint16x8_t)B, + (uint16x8_t)A, + }}; + vst4q_u16(rgba, v); + #elif defined(USING_NEON) + uint16x4x4_t v = {{ + (uint16x4_t)R, + (uint16x4_t)G, + (uint16x4_t)B, + (uint16x4_t)A, + }}; + vst4_u16(rgba, v); + #else + store(rgba, cast(R) << 0 + | cast(G) << 16 + | cast(B) << 32 + | cast(A) << 48); + #endif + + } return; + + case Op_store_fff: { + uintptr_t ptr = (uintptr_t)(dst + 12*i); + assert( (ptr & 3) == 0 ); // The dst pointer must be 4-byte aligned + float* rgb = (float*)ptr; // for this cast to float* to be safe. + #if defined(USING_NEON_FP16) + float32x4x3_t lo = {{ + vcvt_f32_f16(vget_low_f16(r)), + vcvt_f32_f16(vget_low_f16(g)), + vcvt_f32_f16(vget_low_f16(b)), + }}, hi = {{ + vcvt_f32_f16(vget_high_f16(r)), + vcvt_f32_f16(vget_high_f16(g)), + vcvt_f32_f16(vget_high_f16(b)), + }}; + vst3q_f32(rgb + 0, lo); + vst3q_f32(rgb + 12, hi); + #elif defined(USING_NEON) + float32x4x3_t v = {{ + (float32x4_t)r, + (float32x4_t)g, + (float32x4_t)b, + }}; + vst3q_f32(rgb, v); + #else + store_3(rgb+0, r); + store_3(rgb+1, g); + store_3(rgb+2, b); + #endif + } return; + + case Op_store_ffff: { + uintptr_t ptr = (uintptr_t)(dst + 16*i); + assert( (ptr & 3) == 0 ); // The dst pointer must be 4-byte aligned + float* rgba = (float*)ptr; // for this cast to float* to be safe. + #if defined(USING_NEON_FP16) + float32x4x4_t lo = {{ + vcvt_f32_f16(vget_low_f16(r)), + vcvt_f32_f16(vget_low_f16(g)), + vcvt_f32_f16(vget_low_f16(b)), + vcvt_f32_f16(vget_low_f16(a)), + }}, hi = {{ + vcvt_f32_f16(vget_high_f16(r)), + vcvt_f32_f16(vget_high_f16(g)), + vcvt_f32_f16(vget_high_f16(b)), + vcvt_f32_f16(vget_high_f16(a)), + }}; + vst4q_f32(rgba + 0, lo); + vst4q_f32(rgba + 16, hi); + #elif defined(USING_NEON) + float32x4x4_t v = {{ + (float32x4_t)r, + (float32x4_t)g, + (float32x4_t)b, + (float32x4_t)a, + }}; + vst4q_f32(rgba, v); + #else + store_4(rgba+0, r); + store_4(rgba+1, g); + store_4(rgba+2, b); + store_4(rgba+3, a); + #endif + } return; + } + } +} + + +static void run_program(const Op* program, const void** arguments, + const char* src, char* dst, int n, + const size_t src_bpp, const size_t dst_bpp) { + int i = 0; + while (n >= N) { + exec_ops(program, arguments, src, dst, i); + i += N; + n -= N; + } + if (n > 0) { + char tmp[4*4*N] = {0}; + + memcpy(tmp, (const char*)src + (size_t)i*src_bpp, (size_t)n*src_bpp); + exec_ops(program, arguments, tmp, tmp, 0); + memcpy((char*)dst + (size_t)i*dst_bpp, tmp, (size_t)n*dst_bpp); + } +} + +// Clean up any #defines we may have set so that we can be #included again. +#if defined(USING_AVX) + #undef USING_AVX +#endif +#if defined(USING_AVX_F16C) + #undef USING_AVX_F16C +#endif +#if defined(USING_AVX2) + #undef USING_AVX2 +#endif +#if defined(USING_AVX512F) + #undef USING_AVX512F +#endif + +#if defined(USING_NEON) + #undef USING_NEON +#endif +#if defined(USING_NEON_F16C) + #undef USING_NEON_F16C +#endif +#if defined(USING_NEON_FP16) + #undef USING_NEON_FP16 +#endif + +#undef FALLTHROUGH diff --git a/gfx/skia/skia/modules/skcms/version.sha1 b/gfx/skia/skia/modules/skcms/version.sha1 new file mode 100755 index 0000000000..ae57df7d06 --- /dev/null +++ b/gfx/skia/skia/modules/skcms/version.sha1 @@ -0,0 +1 @@ +ba39d81f9797aa973bdf01aa6b0363b280352fba diff --git a/gfx/skia/skia/src/base/README.md b/gfx/skia/skia/src/base/README.md new file mode 100644 index 0000000000..322c671436 --- /dev/null +++ b/gfx/skia/skia/src/base/README.md @@ -0,0 +1,4 @@ +The files here are part of the base package (see also include/private/base). The distinction +is that the files here are not needed by anything in the public API. + +Files here should not depend on anything other than system headers or other files in base. \ No newline at end of file diff --git a/gfx/skia/skia/src/base/SkASAN.h b/gfx/skia/skia/src/base/SkASAN.h new file mode 100644 index 0000000000..8da93daaa0 --- /dev/null +++ b/gfx/skia/skia/src/base/SkASAN.h @@ -0,0 +1,65 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkASAN_DEFINED +#define SkASAN_DEFINED + +#include + +#ifdef MOZ_SKIA + +#include "mozilla/MemoryChecking.h" + +#ifdef MOZ_HAVE_MEM_CHECKS +#define SK_SANITIZE_ADDRESS MOZ_HAVE_MEM_CHECKS +#endif + +static inline void sk_asan_poison_memory_region(void const volatile *addr, size_t size) { + MOZ_MAKE_MEM_NOACCESS(addr, size); +} + +static inline void sk_asan_unpoison_memory_region(void const volatile *addr, size_t size) { + MOZ_MAKE_MEM_DEFINED(addr, size); +} + +#else // !MOZ_SKIA + +#ifdef __SANITIZE_ADDRESS__ + #define SK_SANITIZE_ADDRESS 1 +#endif +#if !defined(SK_SANITIZE_ADDRESS) && defined(__has_feature) + #if __has_feature(address_sanitizer) + #define SK_SANITIZE_ADDRESS 1 + #endif +#endif + +// Typically declared in LLVM's asan_interface.h. +#ifdef SK_SANITIZE_ADDRESS +extern "C" { + void __asan_poison_memory_region(void const volatile *addr, size_t size); + void __asan_unpoison_memory_region(void const volatile *addr, size_t size); +} +#endif + +// Code that implements bespoke allocation arenas can poison the entire arena on creation, then +// unpoison chunks of arena memory as they are parceled out. Consider leaving gaps between blocks +// to detect buffer overrun. +static inline void sk_asan_poison_memory_region(void const volatile *addr, size_t size) { +#ifdef SK_SANITIZE_ADDRESS + __asan_poison_memory_region(addr, size); +#endif +} + +static inline void sk_asan_unpoison_memory_region(void const volatile *addr, size_t size) { +#ifdef SK_SANITIZE_ADDRESS + __asan_unpoison_memory_region(addr, size); +#endif +} + +#endif // !MOZ_SKIA + +#endif // SkASAN_DEFINED diff --git a/gfx/skia/skia/src/base/SkArenaAlloc.cpp b/gfx/skia/skia/src/base/SkArenaAlloc.cpp new file mode 100644 index 0000000000..2dc1c00226 --- /dev/null +++ b/gfx/skia/skia/src/base/SkArenaAlloc.cpp @@ -0,0 +1,173 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkArenaAlloc.h" + +#include "include/private/base/SkMalloc.h" + +#include +#include +#include + +static char* end_chain(char*) { return nullptr; } + +SkArenaAlloc::SkArenaAlloc(char* block, size_t size, size_t firstHeapAllocation) + : fDtorCursor {block} + , fCursor {block} + , fEnd {block + SkToU32(size)} + , fFibonacciProgression{SkToU32(size), SkToU32(firstHeapAllocation)} +{ + if (size < sizeof(Footer)) { + fEnd = fCursor = fDtorCursor = nullptr; + } + + if (fCursor != nullptr) { + this->installFooter(end_chain, 0); + sk_asan_poison_memory_region(fCursor, fEnd - fCursor); + } +} + +SkArenaAlloc::~SkArenaAlloc() { + RunDtorsOnBlock(fDtorCursor); +} + +void SkArenaAlloc::installFooter(FooterAction* action, uint32_t padding) { + assert(SkTFitsIn(padding)); + this->installRaw(action); + this->installRaw((uint8_t)padding); + fDtorCursor = fCursor; +} + +char* SkArenaAlloc::SkipPod(char* footerEnd) { + char* objEnd = footerEnd - (sizeof(Footer) + sizeof(uint32_t)); + uint32_t skip; + memmove(&skip, objEnd, sizeof(uint32_t)); + return objEnd - (ptrdiff_t) skip; +} + +void SkArenaAlloc::RunDtorsOnBlock(char* footerEnd) { + while (footerEnd != nullptr) { + FooterAction* action; + uint8_t padding; + + memcpy(&action, footerEnd - sizeof( Footer), sizeof( action)); + memcpy(&padding, footerEnd - sizeof(padding), sizeof(padding)); + + footerEnd = action(footerEnd) - (ptrdiff_t)padding; + } +} + +char* SkArenaAlloc::NextBlock(char* footerEnd) { + char* objEnd = footerEnd - (sizeof(char*) + sizeof(Footer)); + char* next; + memmove(&next, objEnd, sizeof(char*)); + RunDtorsOnBlock(next); + sk_free(objEnd); + return nullptr; +} + +void SkArenaAlloc::ensureSpace(uint32_t size, uint32_t alignment) { + constexpr uint32_t headerSize = sizeof(Footer) + sizeof(ptrdiff_t); + constexpr uint32_t maxSize = std::numeric_limits::max(); + constexpr uint32_t overhead = headerSize + sizeof(Footer); + AssertRelease(size <= maxSize - overhead); + uint32_t objSizeAndOverhead = size + overhead; + + const uint32_t alignmentOverhead = alignment - 1; + AssertRelease(objSizeAndOverhead <= maxSize - alignmentOverhead); + objSizeAndOverhead += alignmentOverhead; + + uint32_t minAllocationSize = fFibonacciProgression.nextBlockSize(); + uint32_t allocationSize = std::max(objSizeAndOverhead, minAllocationSize); + + // Round up to a nice size. If > 32K align to 4K boundary else up to max_align_t. The > 32K + // heuristic is from the JEMalloc behavior. + { + uint32_t mask = allocationSize > (1 << 15) ? (1 << 12) - 1 : 16 - 1; + AssertRelease(allocationSize <= maxSize - mask); + allocationSize = (allocationSize + mask) & ~mask; + } + + char* newBlock = static_cast(sk_malloc_throw(allocationSize)); + + auto previousDtor = fDtorCursor; + fCursor = newBlock; + fDtorCursor = newBlock; + fEnd = fCursor + allocationSize; + + // poison the unused bytes in the block. + sk_asan_poison_memory_region(fCursor, fEnd - fCursor); + + this->installRaw(previousDtor); + this->installFooter(NextBlock, 0); +} + +char* SkArenaAlloc::allocObjectWithFooter(uint32_t sizeIncludingFooter, uint32_t alignment) { + uintptr_t mask = alignment - 1; + +restart: + uint32_t skipOverhead = 0; + const bool needsSkipFooter = fCursor != fDtorCursor; + if (needsSkipFooter) { + skipOverhead = sizeof(Footer) + sizeof(uint32_t); + } + const uint32_t totalSize = sizeIncludingFooter + skipOverhead; + + // Math on null fCursor/fEnd is undefined behavior, so explicitly check for first alloc. + if (!fCursor) { + this->ensureSpace(totalSize, alignment); + goto restart; + } + + assert(fEnd); + // This test alone would be enough nullptr were defined to be 0, but it's not. + char* objStart = (char*)((uintptr_t)(fCursor + skipOverhead + mask) & ~mask); + if ((ptrdiff_t)totalSize > fEnd - objStart) { + this->ensureSpace(totalSize, alignment); + goto restart; + } + + AssertRelease((ptrdiff_t)totalSize <= fEnd - objStart); + + // Install a skip footer if needed, thus terminating a run of POD data. The calling code is + // responsible for installing the footer after the object. + if (needsSkipFooter) { + this->installRaw(SkToU32(fCursor - fDtorCursor)); + this->installFooter(SkipPod, 0); + } + + return objStart; +} + +SkArenaAllocWithReset::SkArenaAllocWithReset(char* block, + size_t size, + size_t firstHeapAllocation) + : SkArenaAlloc(block, size, firstHeapAllocation) + , fFirstBlock{block} + , fFirstSize{SkToU32(size)} + , fFirstHeapAllocationSize{SkToU32(firstHeapAllocation)} {} + +void SkArenaAllocWithReset::reset() { + char* const firstBlock = fFirstBlock; + const uint32_t firstSize = fFirstSize; + const uint32_t firstHeapAllocationSize = fFirstHeapAllocationSize; + this->~SkArenaAllocWithReset(); + new (this) SkArenaAllocWithReset{firstBlock, firstSize, firstHeapAllocationSize}; +} + +// SkFibonacci47 is the first 47 Fibonacci numbers. Fib(47) is the largest value less than 2 ^ 32. +// Used by SkFibBlockSizes. +std::array SkFibonacci47 { + 1, 1, 2, 3, 5, 8, + 13, 21, 34, 55, 89, 144, + 233, 377, 610, 987, 1597, 2584, + 4181, 6765, 10946, 17711, 28657, 46368, + 75025, 121393, 196418, 317811, 514229, 832040, + 1346269, 2178309, 3524578, 5702887, 9227465, 14930352, + 24157817, 39088169, 63245986, 102334155, 165580141, 267914296, + 433494437, 701408733, 1134903170, 1836311903, 2971215073, +}; diff --git a/gfx/skia/skia/src/base/SkArenaAlloc.h b/gfx/skia/skia/src/base/SkArenaAlloc.h new file mode 100644 index 0000000000..547f2c5910 --- /dev/null +++ b/gfx/skia/skia/src/base/SkArenaAlloc.h @@ -0,0 +1,336 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkArenaAlloc_DEFINED +#define SkArenaAlloc_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkASAN.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +// We found allocating strictly doubling amounts of memory from the heap left too +// much unused slop, particularly on Android. Instead we'll follow a Fibonacci-like +// progression. + +// SkFibonacci47 is the first 47 Fibonacci numbers. Fib(47) is the largest value less than 2 ^ 32. +extern std::array SkFibonacci47; +template +class SkFibBlockSizes { +public: + // staticBlockSize, and firstAllocationSize are parameters describing the initial memory + // layout. staticBlockSize describes the size of the inlined memory, and firstAllocationSize + // describes the size of the first block to be allocated if the static block is exhausted. By + // convention, firstAllocationSize is the first choice for the block unit size followed by + // staticBlockSize followed by the default of 1024 bytes. + SkFibBlockSizes(uint32_t staticBlockSize, uint32_t firstAllocationSize) : fIndex{0} { + fBlockUnitSize = firstAllocationSize > 0 ? firstAllocationSize : + staticBlockSize > 0 ? staticBlockSize : 1024; + + SkASSERT_RELEASE(0 < fBlockUnitSize); + SkASSERT_RELEASE(fBlockUnitSize < std::min(kMaxSize, (1u << 26) - 1)); + } + + uint32_t nextBlockSize() { + uint32_t result = SkFibonacci47[fIndex] * fBlockUnitSize; + + if (SkTo(fIndex + 1) < SkFibonacci47.size() && + SkFibonacci47[fIndex + 1] < kMaxSize / fBlockUnitSize) + { + fIndex += 1; + } + + return result; + } + +private: + uint32_t fIndex : 6; + uint32_t fBlockUnitSize : 26; +}; + +// SkArenaAlloc allocates object and destroys the allocated objects when destroyed. It's designed +// to minimize the number of underlying block allocations. SkArenaAlloc allocates first out of an +// (optional) user-provided block of memory, and when that's exhausted it allocates on the heap, +// starting with an allocation of firstHeapAllocation bytes. If your data (plus a small overhead) +// fits in the user-provided block, SkArenaAlloc never uses the heap, and if it fits in +// firstHeapAllocation bytes, it'll use the heap only once. If 0 is specified for +// firstHeapAllocation, then blockSize is used unless that too is 0, then 1024 is used. +// +// Examples: +// +// char block[mostCasesSize]; +// SkArenaAlloc arena(block, mostCasesSize); +// +// If mostCasesSize is too large for the stack, you can use the following pattern. +// +// std::unique_ptr block{new char[mostCasesSize]}; +// SkArenaAlloc arena(block.get(), mostCasesSize, almostAllCasesSize); +// +// If the program only sometimes allocates memory, use the following pattern. +// +// SkArenaAlloc arena(nullptr, 0, almostAllCasesSize); +// +// The storage does not necessarily need to be on the stack. Embedding the storage in a class also +// works. +// +// class Foo { +// char storage[mostCasesSize]; +// SkArenaAlloc arena (storage, mostCasesSize); +// }; +// +// In addition, the system is optimized to handle POD data including arrays of PODs (where +// POD is really data with no destructors). For POD data it has zero overhead per item, and a +// typical per block overhead of 8 bytes. For non-POD objects there is a per item overhead of 4 +// bytes. For arrays of non-POD objects there is a per array overhead of typically 8 bytes. There +// is an addition overhead when switching from POD data to non-POD data of typically 8 bytes. +// +// If additional blocks are needed they are increased exponentially. This strategy bounds the +// recursion of the RunDtorsOnBlock to be limited to O(log size-of-memory). Block size grow using +// the Fibonacci sequence which means that for 2^32 memory there are 48 allocations, and for 2^48 +// there are 71 allocations. +class SkArenaAlloc { +public: + SkArenaAlloc(char* block, size_t blockSize, size_t firstHeapAllocation); + + explicit SkArenaAlloc(size_t firstHeapAllocation) + : SkArenaAlloc(nullptr, 0, firstHeapAllocation) {} + + SkArenaAlloc(const SkArenaAlloc&) = delete; + SkArenaAlloc& operator=(const SkArenaAlloc&) = delete; + SkArenaAlloc(SkArenaAlloc&&) = delete; + SkArenaAlloc& operator=(SkArenaAlloc&&) = delete; + + ~SkArenaAlloc(); + + template + auto make(Ctor&& ctor) -> decltype(ctor(nullptr)) { + using T = std::remove_pointer_t; + + uint32_t size = SkToU32(sizeof(T)); + uint32_t alignment = SkToU32(alignof(T)); + char* objStart; + if (std::is_trivially_destructible::value) { + objStart = this->allocObject(size, alignment); + fCursor = objStart + size; + sk_asan_unpoison_memory_region(objStart, size); + } else { + objStart = this->allocObjectWithFooter(size + sizeof(Footer), alignment); + // Can never be UB because max value is alignof(T). + uint32_t padding = SkToU32(objStart - fCursor); + + // Advance to end of object to install footer. + fCursor = objStart + size; + sk_asan_unpoison_memory_region(objStart, size); + FooterAction* releaser = [](char* objEnd) { + char* objStart = objEnd - (sizeof(T) + sizeof(Footer)); + ((T*)objStart)->~T(); + return objStart; + }; + this->installFooter(releaser, padding); + } + + // This must be last to make objects with nested use of this allocator work. + return ctor(objStart); + } + + template + T* make(Args&&... args) { + return this->make([&](void* objStart) { + return new(objStart) T(std::forward(args)...); + }); + } + + template + T* makeArrayDefault(size_t count) { + T* array = this->allocUninitializedArray(count); + for (size_t i = 0; i < count; i++) { + // Default initialization: if T is primitive then the value is left uninitialized. + new (&array[i]) T; + } + return array; + } + + template + T* makeArray(size_t count) { + T* array = this->allocUninitializedArray(count); + for (size_t i = 0; i < count; i++) { + // Value initialization: if T is primitive then the value is zero-initialized. + new (&array[i]) T(); + } + return array; + } + + template + T* makeInitializedArray(size_t count, Initializer initializer) { + T* array = this->allocUninitializedArray(count); + for (size_t i = 0; i < count; i++) { + new (&array[i]) T(initializer(i)); + } + return array; + } + + // Only use makeBytesAlignedTo if none of the typed variants are impractical to use. + void* makeBytesAlignedTo(size_t size, size_t align) { + AssertRelease(SkTFitsIn(size)); + auto objStart = this->allocObject(SkToU32(size), SkToU32(align)); + fCursor = objStart + size; + sk_asan_unpoison_memory_region(objStart, size); + return objStart; + } + +private: + static void AssertRelease(bool cond) { if (!cond) { ::abort(); } } + + using FooterAction = char* (char*); + struct Footer { + uint8_t unaligned_action[sizeof(FooterAction*)]; + uint8_t padding; + }; + + static char* SkipPod(char* footerEnd); + static void RunDtorsOnBlock(char* footerEnd); + static char* NextBlock(char* footerEnd); + + template + void installRaw(const T& val) { + sk_asan_unpoison_memory_region(fCursor, sizeof(val)); + memcpy(fCursor, &val, sizeof(val)); + fCursor += sizeof(val); + } + void installFooter(FooterAction* releaser, uint32_t padding); + + void ensureSpace(uint32_t size, uint32_t alignment); + + char* allocObject(uint32_t size, uint32_t alignment) { + uintptr_t mask = alignment - 1; + uintptr_t alignedOffset = (~reinterpret_cast(fCursor) + 1) & mask; + uintptr_t totalSize = size + alignedOffset; + AssertRelease(totalSize >= size); + if (totalSize > static_cast(fEnd - fCursor)) { + this->ensureSpace(size, alignment); + alignedOffset = (~reinterpret_cast(fCursor) + 1) & mask; + } + + char* object = fCursor + alignedOffset; + + SkASSERT((reinterpret_cast(object) & (alignment - 1)) == 0); + SkASSERT(object + size <= fEnd); + + return object; + } + + char* allocObjectWithFooter(uint32_t sizeIncludingFooter, uint32_t alignment); + + template + T* allocUninitializedArray(size_t countZ) { + AssertRelease(SkTFitsIn(countZ)); + uint32_t count = SkToU32(countZ); + + char* objStart; + AssertRelease(count <= std::numeric_limits::max() / sizeof(T)); + uint32_t arraySize = SkToU32(count * sizeof(T)); + uint32_t alignment = SkToU32(alignof(T)); + + if (std::is_trivially_destructible::value) { + objStart = this->allocObject(arraySize, alignment); + fCursor = objStart + arraySize; + sk_asan_unpoison_memory_region(objStart, arraySize); + } else { + constexpr uint32_t overhead = sizeof(Footer) + sizeof(uint32_t); + AssertRelease(arraySize <= std::numeric_limits::max() - overhead); + uint32_t totalSize = arraySize + overhead; + objStart = this->allocObjectWithFooter(totalSize, alignment); + + // Can never be UB because max value is alignof(T). + uint32_t padding = SkToU32(objStart - fCursor); + + // Advance to end of array to install footer. + fCursor = objStart + arraySize; + sk_asan_unpoison_memory_region(objStart, arraySize); + this->installRaw(SkToU32(count)); + this->installFooter( + [](char* footerEnd) { + char* objEnd = footerEnd - (sizeof(Footer) + sizeof(uint32_t)); + uint32_t count; + memmove(&count, objEnd, sizeof(uint32_t)); + char* objStart = objEnd - count * sizeof(T); + T* array = (T*) objStart; + for (uint32_t i = 0; i < count; i++) { + array[i].~T(); + } + return objStart; + }, + padding); + } + + return (T*)objStart; + } + + char* fDtorCursor; + char* fCursor; + char* fEnd; + + SkFibBlockSizes::max()> fFibonacciProgression; +}; + +class SkArenaAllocWithReset : public SkArenaAlloc { +public: + SkArenaAllocWithReset(char* block, size_t blockSize, size_t firstHeapAllocation); + + explicit SkArenaAllocWithReset(size_t firstHeapAllocation) + : SkArenaAllocWithReset(nullptr, 0, firstHeapAllocation) {} + + // Destroy all allocated objects, free any heap allocations. + void reset(); + +private: + char* const fFirstBlock; + const uint32_t fFirstSize; + const uint32_t fFirstHeapAllocationSize; +}; + +// Helper for defining allocators with inline/reserved storage. +// For argument declarations, stick to the base type (SkArenaAlloc). +// Note: Inheriting from the storage first means the storage will outlive the +// SkArenaAlloc, letting ~SkArenaAlloc read it as it calls destructors. +// (This is mostly only relevant for strict tools like MSAN.) +template +class SkSTArenaAlloc : private std::array, public SkArenaAlloc { +public: + explicit SkSTArenaAlloc(size_t firstHeapAllocation = InlineStorageSize) + : SkArenaAlloc{this->data(), this->size(), firstHeapAllocation} {} + + ~SkSTArenaAlloc() { + // Be sure to unpoison the memory that is probably on the stack. + sk_asan_unpoison_memory_region(this->data(), this->size()); + } +}; + +template +class SkSTArenaAllocWithReset + : private std::array, public SkArenaAllocWithReset { +public: + explicit SkSTArenaAllocWithReset(size_t firstHeapAllocation = InlineStorageSize) + : SkArenaAllocWithReset{this->data(), this->size(), firstHeapAllocation} {} + + ~SkSTArenaAllocWithReset() { + // Be sure to unpoison the memory that is probably on the stack. + sk_asan_unpoison_memory_region(this->data(), this->size()); + } +}; + +#endif // SkArenaAlloc_DEFINED diff --git a/gfx/skia/skia/src/base/SkArenaAllocList.h b/gfx/skia/skia/src/base/SkArenaAllocList.h new file mode 100644 index 0000000000..57bce52023 --- /dev/null +++ b/gfx/skia/skia/src/base/SkArenaAllocList.h @@ -0,0 +1,82 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkArenaAllocList_DEFINED +#define SkArenaAllocList_DEFINED + +#include "include/private/base/SkAssert.h" +#include "src/base/SkArenaAlloc.h" // IWYU pragma: keep + +#include + +/** + * A singly linked list of Ts stored in a SkArenaAlloc. The arena rather than the list owns + * the elements. This supports forward iteration and range based for loops. + */ +template +class SkArenaAllocList { +private: + struct Node; + +public: + SkArenaAllocList() = default; + + void reset() { fHead = fTail = nullptr; } + + template + inline T& append(SkArenaAlloc* arena, Args... args); + + class Iter { + public: + Iter() = default; + inline Iter& operator++(); + T& operator*() const { return fCurr->fT; } + T* operator->() const { return &fCurr->fT; } + bool operator==(const Iter& that) const { return fCurr == that.fCurr; } + bool operator!=(const Iter& that) const { return !(*this == that); } + + private: + friend class SkArenaAllocList; + explicit Iter(Node* node) : fCurr(node) {} + Node* fCurr = nullptr; + }; + + Iter begin() { return Iter(fHead); } + Iter end() { return Iter(); } + Iter tail() { return Iter(fTail); } + +private: + struct Node { + template + Node(Args... args) : fT(std::forward(args)...) {} + T fT; + Node* fNext = nullptr; + }; + Node* fHead = nullptr; + Node* fTail = nullptr; +}; + +template +template +T& SkArenaAllocList::append(SkArenaAlloc* arena, Args... args) { + SkASSERT(!fHead == !fTail); + auto* n = arena->make(std::forward(args)...); + if (!fTail) { + fHead = fTail = n; + } else { + fTail = fTail->fNext = n; + } + return fTail->fT; +} + +template +typename SkArenaAllocList::Iter& SkArenaAllocList::Iter::operator++() { + fCurr = fCurr->fNext; + return *this; +} + +#endif diff --git a/gfx/skia/skia/src/base/SkAutoMalloc.h b/gfx/skia/skia/src/base/SkAutoMalloc.h new file mode 100644 index 0000000000..6520cc0582 --- /dev/null +++ b/gfx/skia/skia/src/base/SkAutoMalloc.h @@ -0,0 +1,178 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAutoMalloc_DEFINED +#define SkAutoMalloc_DEFINED + +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkNoncopyable.h" + +#include +#include +#include + +/** + * Manage an allocated block of heap memory. This object is the sole manager of + * the lifetime of the block, so the caller must not call sk_free() or delete + * on the block, unless release() was called. + */ +class SkAutoMalloc : SkNoncopyable { +public: + explicit SkAutoMalloc(size_t size = 0) + : fPtr(size ? sk_malloc_throw(size) : nullptr), fSize(size) {} + + /** + * Passed to reset to specify what happens if the requested size is smaller + * than the current size (and the current block was dynamically allocated). + */ + enum OnShrink { + /** + * If the requested size is smaller than the current size, and the + * current block is dynamically allocated, free the old block and + * malloc a new block of the smaller size. + */ + kAlloc_OnShrink, + + /** + * If the requested size is smaller than the current size, and the + * current block is dynamically allocated, just return the old + * block. + */ + kReuse_OnShrink + }; + + /** + * Reallocates the block to a new size. The ptr may or may not change. + */ + void* reset(size_t size = 0, OnShrink shrink = kAlloc_OnShrink) { + if (size != fSize && (size > fSize || kReuse_OnShrink != shrink)) { + fPtr.reset(size ? sk_malloc_throw(size) : nullptr); + fSize = size; + } + return fPtr.get(); + } + + /** + * Return the allocated block. + */ + void* get() { return fPtr.get(); } + const void* get() const { return fPtr.get(); } + + /** Transfer ownership of the current ptr to the caller, setting the + internal reference to null. Note the caller is reponsible for calling + sk_free on the returned address. + */ + void* release() { + fSize = 0; + return fPtr.release(); + } + +private: + struct WrapFree { + void operator()(void* p) { sk_free(p); } + }; + std::unique_ptr fPtr; + size_t fSize; // can be larger than the requested size (see kReuse) +}; + +/** + * Manage an allocated block of memory. If the requested size is <= kSizeRequested (or slightly + * more), then the allocation will come from the stack rather than the heap. This object is the + * sole manager of the lifetime of the block, so the caller must not call sk_free() or delete on + * the block. + */ +template class SkAutoSMalloc : SkNoncopyable { +public: + /** + * Creates initially empty storage. get() returns a ptr, but it is to a zero-byte allocation. + * Must call reset(size) to return an allocated block. + */ + SkAutoSMalloc() { + fPtr = fStorage; + fSize = kSize; + } + + /** + * Allocate a block of the specified size. If size <= kSizeRequested (or slightly more), then + * the allocation will come from the stack, otherwise it will be dynamically allocated. + */ + explicit SkAutoSMalloc(size_t size) { + fPtr = fStorage; + fSize = kSize; + this->reset(size); + } + + /** + * Free the allocated block (if any). If the block was small enough to have been allocated on + * the stack, then this does nothing. + */ + ~SkAutoSMalloc() { + if (fPtr != (void*)fStorage) { + sk_free(fPtr); + } + } + + /** + * Return the allocated block. May return non-null even if the block is of zero size. Since + * this may be on the stack or dynamically allocated, the caller must not call sk_free() on it, + * but must rely on SkAutoSMalloc to manage it. + */ + void* get() const { return fPtr; } + + /** + * Return a new block of the requested size, freeing (as necessary) any previously allocated + * block. As with the constructor, if size <= kSizeRequested (or slightly more) then the return + * block may be allocated locally, rather than from the heap. + */ + void* reset(size_t size, + SkAutoMalloc::OnShrink shrink = SkAutoMalloc::kAlloc_OnShrink, + bool* didChangeAlloc = nullptr) { + size = (size < kSize) ? kSize : size; + bool alloc = size != fSize && (SkAutoMalloc::kAlloc_OnShrink == shrink || size > fSize); + if (didChangeAlloc) { + *didChangeAlloc = alloc; + } + if (alloc) { + if (fPtr != (void*)fStorage) { + sk_free(fPtr); + } + + if (size == kSize) { + SkASSERT(fPtr != fStorage); // otherwise we lied when setting didChangeAlloc. + fPtr = fStorage; + } else { + fPtr = sk_malloc_throw(size); + } + + fSize = size; + } + SkASSERT(fSize >= size && fSize >= kSize); + SkASSERT((fPtr == fStorage) || fSize > kSize); + return fPtr; + } + +private: + // Align up to 32 bits. + static const size_t kSizeAlign4 = SkAlign4(kSizeRequested); +#if defined(SK_BUILD_FOR_GOOGLE3) + // Stack frame size is limited for SK_BUILD_FOR_GOOGLE3. 4k is less than the actual max, but some functions + // have multiple large stack allocations. + static const size_t kMaxBytes = 4 * 1024; + static const size_t kSize = kSizeRequested > kMaxBytes ? kMaxBytes : kSizeAlign4; +#else + static const size_t kSize = kSizeAlign4; +#endif + + void* fPtr; + size_t fSize; // can be larger than the requested size (see kReuse) + uint32_t fStorage[kSize >> 2]; +}; +// Can't guard the constructor because it's a template class. + +#endif diff --git a/gfx/skia/skia/src/base/SkBezierCurves.cpp b/gfx/skia/skia/src/base/SkBezierCurves.cpp new file mode 100644 index 0000000000..a79129ff7d --- /dev/null +++ b/gfx/skia/skia/src/base/SkBezierCurves.cpp @@ -0,0 +1,111 @@ +/* + * Copyright 2012 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkBezierCurves.h" + +#include "include/private/base/SkAssert.h" + +#include + +static inline double interpolate(double A, double B, double t) { + return A + (B - A) * t; +} + +std::array SkBezierCubic::EvalAt(const double curve[8], double t) { + const auto in_X = [&curve](size_t n) { return curve[2*n]; }; + const auto in_Y = [&curve](size_t n) { return curve[2*n + 1]; }; + + // Two semi-common fast paths + if (t == 0) { + return {in_X(0), in_Y(0)}; + } + if (t == 1) { + return {in_X(3), in_Y(3)}; + } + // X(t) = X_0*(1-t)^3 + 3*X_1*t(1-t)^2 + 3*X_2*t^2(1-t) + X_3*t^3 + // Y(t) = Y_0*(1-t)^3 + 3*Y_1*t(1-t)^2 + 3*Y_2*t^2(1-t) + Y_3*t^3 + // Some compilers are smart enough and have sufficient registers/intrinsics to write optimal + // code from + // double one_minus_t = 1 - t; + // double a = one_minus_t * one_minus_t * one_minus_t; + // double b = 3 * one_minus_t * one_minus_t * t; + // double c = 3 * one_minus_t * t * t; + // double d = t * t * t; + // However, some (e.g. when compiling for ARM) fail to do so, so we use this form + // to help more compilers generate smaller/faster ASM. https://godbolt.org/z/M6jG9x45c + double one_minus_t = 1 - t; + double one_minus_t_squared = one_minus_t * one_minus_t; + double a = (one_minus_t_squared * one_minus_t); + double b = 3 * one_minus_t_squared * t; + double t_squared = t * t; + double c = 3 * one_minus_t * t_squared; + double d = t_squared * t; + + return {a * in_X(0) + b * in_X(1) + c * in_X(2) + d * in_X(3), + a * in_Y(0) + b * in_Y(1) + c * in_Y(2) + d * in_Y(3)}; +} + +// Perform subdivision using De Casteljau's algorithm, that is, repeated linear +// interpolation between adjacent points. +void SkBezierCubic::Subdivide(const double curve[8], double t, + double twoCurves[14]) { + SkASSERT(0.0 <= t && t <= 1.0); + // We split the curve "in" into two curves "alpha" and "beta" + const auto in_X = [&curve](size_t n) { return curve[2*n]; }; + const auto in_Y = [&curve](size_t n) { return curve[2*n + 1]; }; + const auto alpha_X = [&twoCurves](size_t n) -> double& { return twoCurves[2*n]; }; + const auto alpha_Y = [&twoCurves](size_t n) -> double& { return twoCurves[2*n + 1]; }; + const auto beta_X = [&twoCurves](size_t n) -> double& { return twoCurves[2*n + 6]; }; + const auto beta_Y = [&twoCurves](size_t n) -> double& { return twoCurves[2*n + 7]; }; + + alpha_X(0) = in_X(0); + alpha_Y(0) = in_Y(0); + + beta_X(3) = in_X(3); + beta_Y(3) = in_Y(3); + + double x01 = interpolate(in_X(0), in_X(1), t); + double y01 = interpolate(in_Y(0), in_Y(1), t); + double x12 = interpolate(in_X(1), in_X(2), t); + double y12 = interpolate(in_Y(1), in_Y(2), t); + double x23 = interpolate(in_X(2), in_X(3), t); + double y23 = interpolate(in_Y(2), in_Y(3), t); + + alpha_X(1) = x01; + alpha_Y(1) = y01; + + beta_X(2) = x23; + beta_Y(2) = y23; + + alpha_X(2) = interpolate(x01, x12, t); + alpha_Y(2) = interpolate(y01, y12, t); + + beta_X(1) = interpolate(x12, x23, t); + beta_Y(1) = interpolate(y12, y23, t); + + alpha_X(3) /*= beta_X(0) */ = interpolate(alpha_X(2), beta_X(1), t); + alpha_Y(3) /*= beta_Y(0) */ = interpolate(alpha_Y(2), beta_Y(1), t); +} + +std::array SkBezierCubic::ConvertToPolynomial(const double curve[8], bool yValues) { + const double* offset_curve = yValues ? curve + 1 : curve; + const auto P = [&offset_curve](size_t n) { return offset_curve[2*n]; }; + // A cubic Bézier curve is interpolated as follows: + // c(t) = (1 - t)^3 P_0 + 3t(1 - t)^2 P_1 + 3t^2 (1 - t) P_2 + t^3 P_3 + // = (-P_0 + 3P_1 + -3P_2 + P_3) t^3 + (3P_0 - 6P_1 + 3P_2) t^2 + + // (-3P_0 + 3P_1) t + P_0 + // Where P_N is the Nth point. The second step expands the polynomial and groups + // by powers of t. The desired output is a cubic formula, so we just need to + // combine the appropriate points to make the coefficients. + std::array results; + results[0] = -P(0) + 3*P(1) - 3*P(2) + P(3); + results[1] = 3*P(0) - 6*P(1) + 3*P(2); + results[2] = -3*P(0) + 3*P(1); + results[3] = P(0); + return results; +} + diff --git a/gfx/skia/skia/src/base/SkBezierCurves.h b/gfx/skia/skia/src/base/SkBezierCurves.h new file mode 100644 index 0000000000..772fee4bf7 --- /dev/null +++ b/gfx/skia/skia/src/base/SkBezierCurves.h @@ -0,0 +1,63 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkBezierCurves_DEFINED +#define SkBezierCurves_DEFINED + +#include + +/** + * Utilities for dealing with cubic Bézier curves. These have a start XY + * point, an end XY point, and two control XY points in between. They take + * a parameter t which is between 0 and 1 (inclusive) which is used to + * interpolate between the start and end points, via a route dictated by + * the control points, and return a new XY point. + * + * We store a Bézier curve as an array of 8 floats or doubles, where + * the even indices are the X coordinates, and the odd indices are the Y + * coordinates. + */ +class SkBezierCubic { +public: + + /** + * Evaluates the cubic Bézier curve for a given t. It returns an X and Y coordinate + * following the formula, which does the interpolation mentioned above. + * X(t) = X_0*(1-t)^3 + 3*X_1*t(1-t)^2 + 3*X_2*t^2(1-t) + X_3*t^3 + * Y(t) = Y_0*(1-t)^3 + 3*Y_1*t(1-t)^2 + 3*Y_2*t^2(1-t) + Y_3*t^3 + * + * t is typically in the range [0, 1], but this function will not assert that, + * as Bézier curves are well-defined for any real number input. + */ + static std::array EvalAt(const double curve[8], double t); + + /** + * Splits the provided Bézier curve at the location t, resulting in two + * Bézier curves that share a point (the end point from curve 1 + * and the start point from curve 2 are the same). + * + * t must be in the interval [0, 1]. + * + * The provided twoCurves array will be filled such that indices + * 0-7 are the first curve (representing the interval [0, t]), and + * indices 6-13 are the second curve (representing [t, 1]). + */ + static void Subdivide(const double curve[8], double t, + double twoCurves[14]); + + /** + * Converts the provided Bézier curve into the the equivalent cubic + * f(t) = A*t^3 + B*t^2 + C*t + D + * where f(t) will represent Y coordinates over time if yValues is + * true and the X coordinates if yValues is false. + * + * In effect, this turns the control points into an actual line, representing + * the x or y values. + */ + static std::array ConvertToPolynomial(const double curve[8], bool yValues); +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkBlockAllocator.cpp b/gfx/skia/skia/src/base/SkBlockAllocator.cpp new file mode 100644 index 0000000000..e62fc2078d --- /dev/null +++ b/gfx/skia/skia/src/base/SkBlockAllocator.cpp @@ -0,0 +1,302 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkBlockAllocator.h" + +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTo.h" + +#ifdef SK_DEBUG +#include +#endif + +SkBlockAllocator::SkBlockAllocator(GrowthPolicy policy, size_t blockIncrementBytes, + size_t additionalPreallocBytes) + : fTail(&fHead) + // Round up to the nearest max-aligned value, and then divide so that fBlockSizeIncrement + // can effectively fit higher byte counts in its 16 bits of storage + , fBlockIncrement(SkTo( + std::min(SkAlignTo(blockIncrementBytes, kAddressAlign) / kAddressAlign, + (size_t) std::numeric_limits::max()))) + , fGrowthPolicy(static_cast(policy)) + , fN0((policy == GrowthPolicy::kLinear || policy == GrowthPolicy::kExponential) ? 1 : 0) + , fN1(1) + // The head block always fills remaining space from SkBlockAllocator's size, because it's + // inline, but can take over the specified number of bytes immediately after it. + , fHead(/*prev=*/nullptr, additionalPreallocBytes + BaseHeadBlockSize()) { + SkASSERT(fBlockIncrement >= 1); + SkASSERT(additionalPreallocBytes <= kMaxAllocationSize); +} + +SkBlockAllocator::Block::Block(Block* prev, int allocationSize) + : fNext(nullptr) + , fPrev(prev) + , fSize(allocationSize) + , fCursor(kDataStart) + , fMetadata(0) + , fAllocatorMetadata(0) { + SkASSERT(allocationSize >= (int) sizeof(Block)); + SkDEBUGCODE(fSentinel = kAssignedMarker;) + + this->poisonRange(kDataStart, fSize); +} + +SkBlockAllocator::Block::~Block() { + this->unpoisonRange(kDataStart, fSize); + + SkASSERT(fSentinel == kAssignedMarker); + SkDEBUGCODE(fSentinel = kFreedMarker;) // FWIW +} + +size_t SkBlockAllocator::totalSize() const { + // Use size_t since the sum across all blocks could exceed 'int', even though each block won't + size_t size = offsetof(SkBlockAllocator, fHead) + this->scratchBlockSize(); + for (const Block* b : this->blocks()) { + size += b->fSize; + } + SkASSERT(size >= this->preallocSize()); + return size; +} + +size_t SkBlockAllocator::totalUsableSpace() const { + size_t size = this->scratchBlockSize(); + if (size > 0) { + size -= kDataStart; // scratchBlockSize reports total block size, not usable size + } + for (const Block* b : this->blocks()) { + size += (b->fSize - kDataStart); + } + SkASSERT(size >= this->preallocUsableSpace()); + return size; +} + +size_t SkBlockAllocator::totalSpaceInUse() const { + size_t size = 0; + for (const Block* b : this->blocks()) { + size += (b->fCursor - kDataStart); + } + SkASSERT(size <= this->totalUsableSpace()); + return size; +} + +SkBlockAllocator::Block* SkBlockAllocator::findOwningBlock(const void* p) { + // When in doubt, search in reverse to find an overlapping block. + uintptr_t ptr = reinterpret_cast(p); + for (Block* b : this->rblocks()) { + uintptr_t lowerBound = reinterpret_cast(b) + kDataStart; + uintptr_t upperBound = reinterpret_cast(b) + b->fSize; + if (lowerBound <= ptr && ptr < upperBound) { + SkASSERT(b->fSentinel == kAssignedMarker); + return b; + } + } + return nullptr; +} + +void SkBlockAllocator::releaseBlock(Block* block) { + if (block == &fHead) { + // Reset the cursor of the head block so that it can be reused if it becomes the new tail + block->fCursor = kDataStart; + block->fMetadata = 0; + block->poisonRange(kDataStart, block->fSize); + // Unlike in reset(), we don't set the head's next block to null because there are + // potentially heap-allocated blocks that are still connected to it. + } else { + SkASSERT(block->fPrev); + block->fPrev->fNext = block->fNext; + if (block->fNext) { + SkASSERT(fTail != block); + block->fNext->fPrev = block->fPrev; + } else { + SkASSERT(fTail == block); + fTail = block->fPrev; + } + + // The released block becomes the new scratch block (if it's bigger), or delete it + if (this->scratchBlockSize() < block->fSize) { + SkASSERT(block != fHead.fPrev); // shouldn't already be the scratch block + if (fHead.fPrev) { + delete fHead.fPrev; + } + block->markAsScratch(); + fHead.fPrev = block; + } else { + delete block; + } + } + + // Decrement growth policy (opposite of addBlock()'s increment operations) + GrowthPolicy gp = static_cast(fGrowthPolicy); + if (fN0 > 0 && (fN1 > 1 || gp == GrowthPolicy::kFibonacci)) { + SkASSERT(gp != GrowthPolicy::kFixed); // fixed never needs undoing, fN0 always is 0 + if (gp == GrowthPolicy::kLinear) { + fN1 = fN1 - fN0; + } else if (gp == GrowthPolicy::kFibonacci) { + // Subtract n0 from n1 to get the prior 2 terms in the fibonacci sequence + int temp = fN1 - fN0; // yields prior fN0 + fN1 = fN1 - temp; // yields prior fN1 + fN0 = temp; + } else { + SkASSERT(gp == GrowthPolicy::kExponential); + // Divide by 2 to undo the 2N update from addBlock + fN1 = fN1 >> 1; + fN0 = fN1; + } + } + + SkASSERT(fN1 >= 1 && fN0 >= 0); +} + +void SkBlockAllocator::stealHeapBlocks(SkBlockAllocator* other) { + Block* toSteal = other->fHead.fNext; + if (toSteal) { + // The other's next block connects back to this allocator's current tail, and its new tail + // becomes the end of other's block linked list. + SkASSERT(other->fTail != &other->fHead); + toSteal->fPrev = fTail; + fTail->fNext = toSteal; + fTail = other->fTail; + // The other allocator becomes just its inline head block + other->fTail = &other->fHead; + other->fHead.fNext = nullptr; + } // else no block to steal +} + +void SkBlockAllocator::reset() { + for (Block* b : this->rblocks()) { + if (b == &fHead) { + // Reset metadata and cursor, tail points to the head block again + fTail = b; + b->fNext = nullptr; + b->fCursor = kDataStart; + b->fMetadata = 0; + // For reset(), but NOT releaseBlock(), the head allocatorMetadata and scratch block + // are reset/destroyed. + b->fAllocatorMetadata = 0; + b->poisonRange(kDataStart, b->fSize); + this->resetScratchSpace(); + } else { + delete b; + } + } + SkASSERT(fTail == &fHead && fHead.fNext == nullptr && fHead.fPrev == nullptr && + fHead.metadata() == 0 && fHead.fCursor == kDataStart); + + GrowthPolicy gp = static_cast(fGrowthPolicy); + fN0 = (gp == GrowthPolicy::kLinear || gp == GrowthPolicy::kExponential) ? 1 : 0; + fN1 = 1; +} + +void SkBlockAllocator::resetScratchSpace() { + if (fHead.fPrev) { + delete fHead.fPrev; + fHead.fPrev = nullptr; + } +} + +void SkBlockAllocator::addBlock(int minSize, int maxSize) { + SkASSERT(minSize > (int) sizeof(Block) && minSize <= maxSize); + + // Max positive value for uint:23 storage (decltype(fN0) picks up uint64_t, not uint:23). + static constexpr int kMaxN = (1 << 23) - 1; + static_assert(2 * kMaxN <= std::numeric_limits::max()); // Growth policy won't overflow + + auto alignAllocSize = [](int size) { + // Round to a nice boundary since the block isn't maxing out: + // if allocSize > 32K, aligns on 4K boundary otherwise aligns on max_align_t, to play + // nicely with jeMalloc (from SkArenaAlloc). + int mask = size > (1 << 15) ? ((1 << 12) - 1) : (kAddressAlign - 1); + return (size + mask) & ~mask; + }; + + int allocSize; + void* mem = nullptr; + if (this->scratchBlockSize() >= minSize) { + // Activate the scratch block instead of making a new block + SkASSERT(fHead.fPrev->isScratch()); + allocSize = fHead.fPrev->fSize; + mem = fHead.fPrev; + fHead.fPrev = nullptr; + } else if (minSize < maxSize) { + // Calculate the 'next' size per growth policy sequence + GrowthPolicy gp = static_cast(fGrowthPolicy); + int nextN1 = fN0 + fN1; + int nextN0; + if (gp == GrowthPolicy::kFixed || gp == GrowthPolicy::kLinear) { + nextN0 = fN0; + } else if (gp == GrowthPolicy::kFibonacci) { + nextN0 = fN1; + } else { + SkASSERT(gp == GrowthPolicy::kExponential); + nextN0 = nextN1; + } + fN0 = std::min(kMaxN, nextN0); + fN1 = std::min(kMaxN, nextN1); + + // However, must guard against overflow here, since all the size-based asserts prevented + // alignment/addition overflows, while multiplication requires 2x bits instead of x+1. + int sizeIncrement = fBlockIncrement * kAddressAlign; + if (maxSize / sizeIncrement < nextN1) { + // The growth policy would overflow, so use the max. We've already confirmed that + // maxSize will be sufficient for the requested minimumSize + allocSize = maxSize; + } else { + allocSize = std::min(alignAllocSize(std::max(minSize, sizeIncrement * nextN1)), + maxSize); + } + } else { + SkASSERT(minSize == maxSize); + // Still align on a nice boundary, no max clamping since that would just undo the alignment + allocSize = alignAllocSize(minSize); + } + + // Create new block and append to the linked list of blocks in this allocator + if (!mem) { + mem = operator new(allocSize); + } + fTail->fNext = new (mem) Block(fTail, allocSize); + fTail = fTail->fNext; +} + +#ifdef SK_DEBUG +void SkBlockAllocator::validate() const { + std::vector blocks; + const Block* prev = nullptr; + for (const Block* block : this->blocks()) { + blocks.push_back(block); + + SkASSERT(kAssignedMarker == block->fSentinel); + if (block == &fHead) { + // The head blocks' fPrev may be non-null if it holds a scratch block, but that's not + // considered part of the linked list + SkASSERT(!prev && (!fHead.fPrev || fHead.fPrev->isScratch())); + } else { + SkASSERT(prev == block->fPrev); + } + if (prev) { + SkASSERT(prev->fNext == block); + } + + SkASSERT(block->fSize >= (int) sizeof(Block)); + SkASSERT(block->fCursor >= kDataStart); + SkASSERT(block->fCursor <= block->fSize); + + prev = block; + } + SkASSERT(prev == fTail); + SkASSERT(!blocks.empty()); + SkASSERT(blocks[0] == &fHead); + + // Confirm reverse iteration matches forward iteration + size_t j = blocks.size(); + for (const Block* b : this->rblocks()) { + SkASSERT(b == blocks[j - 1]); + j--; + } + SkASSERT(j == 0); +} +#endif diff --git a/gfx/skia/skia/src/base/SkBlockAllocator.h b/gfx/skia/skia/src/base/SkBlockAllocator.h new file mode 100644 index 0000000000..02201c17d4 --- /dev/null +++ b/gfx/skia/skia/src/base/SkBlockAllocator.h @@ -0,0 +1,754 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlockAllocator_DEFINED +#define SkBlockAllocator_DEFINED + +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkNoncopyable.h" +#include "src/base/SkASAN.h" + +#include +#include +#include +#include +#include +#include + +/** + * SkBlockAllocator provides low-level support for a block allocated arena with a dynamic tail that + * tracks space reservations within each block. Its APIs provide the ability to reserve space, + * resize reservations, and release reservations. It will automatically create new blocks if needed + * and destroy all remaining blocks when it is destructed. It assumes that anything allocated within + * its blocks has its destructors called externally. It is recommended that SkBlockAllocator is + * wrapped by a higher-level allocator that uses the low-level APIs to implement a simpler, + * purpose-focused API w/o having to worry as much about byte-level concerns. + * + * SkBlockAllocator has no limit to its total size, but each allocation is limited to 512MB (which + * should be sufficient for Skia's use cases). This upper allocation limit allows all internal + * operations to be performed using 'int' and avoid many overflow checks. Static asserts are used + * to ensure that those operations would not overflow when using the largest possible values. + * + * Possible use modes: + * 1. No upfront allocation, either on the stack or as a field + * SkBlockAllocator allocator(policy, heapAllocSize); + * + * 2. In-place new'd + * void* mem = operator new(totalSize); + * SkBlockAllocator* allocator = new (mem) SkBlockAllocator(policy, heapAllocSize, + * totalSize- sizeof(SkBlockAllocator)); + * delete allocator; + * + * 3. Use SkSBlockAllocator to increase the preallocation size + * SkSBlockAllocator<1024> allocator(policy, heapAllocSize); + * sizeof(allocator) == 1024; + */ +// TODO(michaelludwig) - While API is different, this shares similarities to SkArenaAlloc and +// SkFibBlockSizes, so we should work to integrate them. +class SkBlockAllocator final : SkNoncopyable { +public: + // Largest size that can be requested from allocate(), chosen because it's the largest pow-2 + // that is less than int32_t::max()/2. + inline static constexpr int kMaxAllocationSize = 1 << 29; + + enum class GrowthPolicy : int { + kFixed, // Next block size = N + kLinear, // = #blocks * N + kFibonacci, // = fibonacci(#blocks) * N + kExponential, // = 2^#blocks * N + kLast = kExponential + }; + inline static constexpr int kGrowthPolicyCount = static_cast(GrowthPolicy::kLast) + 1; + + class Block final { + public: + ~Block(); + void operator delete(void* p) { ::operator delete(p); } + + // Return the maximum allocation size with the given alignment that can fit in this block. + template + int avail() const { return std::max(0, fSize - this->cursor()); } + + // Return the aligned offset of the first allocation, assuming it was made with the + // specified Align, and Padding. The returned offset does not mean a valid allocation + // starts at that offset, this is a utility function for classes built on top to manage + // indexing into a block effectively. + template + int firstAlignedOffset() const { return this->alignedOffset(kDataStart); } + + // Convert an offset into this block's storage into a usable pointer. + void* ptr(int offset) { + SkASSERT(offset >= kDataStart && offset < fSize); + return reinterpret_cast(this) + offset; + } + const void* ptr(int offset) const { return const_cast(this)->ptr(offset); } + + // Every block has an extra 'int' for clients to use however they want. It will start + // at 0 when a new block is made, or when the head block is reset. + int metadata() const { return fMetadata; } + void setMetadata(int value) { fMetadata = value; } + + /** + * Release the byte range between offset 'start' (inclusive) and 'end' (exclusive). This + * will return true if those bytes were successfully reclaimed, i.e. a subsequent allocation + * request could occupy the space. Regardless of return value, the provided byte range that + * [start, end) represents should not be used until it's re-allocated with allocate<...>(). + */ + inline bool release(int start, int end); + + /** + * Resize a previously reserved byte range of offset 'start' (inclusive) to 'end' + * (exclusive). 'deltaBytes' is the SIGNED change to length of the reservation. + * + * When negative this means the reservation is shrunk and the new length is (end - start - + * |deltaBytes|). If this new length would be 0, the byte range can no longer be used (as if + * it were released instead). Asserts that it would not shrink the reservation below 0. + * + * If 'deltaBytes' is positive, the allocator attempts to increase the length of the + * reservation. If 'deltaBytes' is less than or equal to avail() and it was the last + * allocation in the block, it can be resized. If there is not enough available bytes to + * accommodate the increase in size, or another allocation is blocking the increase in size, + * then false will be returned and the reserved byte range is unmodified. + */ + inline bool resize(int start, int end, int deltaBytes); + + private: + friend class SkBlockAllocator; + + Block(Block* prev, int allocationSize); + + // We poison the unallocated space in a Block to allow ASAN to catch invalid writes. + void poisonRange(int start, int end) { + sk_asan_poison_memory_region(reinterpret_cast(this) + start, end - start); + } + void unpoisonRange(int start, int end) { + sk_asan_unpoison_memory_region(reinterpret_cast(this) + start, end - start); + } + + // Get fCursor, but aligned such that ptr(rval) satisfies Align. + template + int cursor() const { return this->alignedOffset(fCursor); } + + template + int alignedOffset(int offset) const; + + bool isScratch() const { return fCursor < 0; } + void markAsScratch() { + fCursor = -1; + this->poisonRange(kDataStart, fSize); + } + + SkDEBUGCODE(uint32_t fSentinel;) // known value to check for bad back pointers to blocks + + Block* fNext; // doubly-linked list of blocks + Block* fPrev; + + // Each block tracks its own cursor because as later blocks are released, an older block + // may become the active tail again. + int fSize; // includes the size of the BlockHeader and requested metadata + int fCursor; // (this + fCursor) points to next available allocation + int fMetadata; + + // On release builds, a Block's other 2 pointers and 3 int fields leaves 4 bytes of padding + // for 8 and 16 aligned systems. Currently this is only manipulated in the head block for + // an allocator-level metadata and is explicitly not reset when the head block is "released" + // Down the road we could instead choose to offer multiple metadata slots per block. + int fAllocatorMetadata; + }; + + // Tuple representing a range of bytes, marking the unaligned start, the first aligned point + // after any padding, and the upper limit depending on requested size. + struct ByteRange { + Block* fBlock; // Owning block + int fStart; // Inclusive byte lower limit of byte range + int fAlignedOffset; // >= start, matching alignment requirement (i.e. first real byte) + int fEnd; // Exclusive upper limit of byte range + }; + + // The size of the head block is determined by 'additionalPreallocBytes'. Subsequent heap blocks + // are determined by 'policy' and 'blockIncrementBytes', although 'blockIncrementBytes' will be + // aligned to std::max_align_t. + // + // When 'additionalPreallocBytes' > 0, the allocator assumes that many extra bytes immediately + // after the allocator can be used by its inline head block. This is useful when the allocator + // is in-place new'ed into a larger block of memory, but it should remain set to 0 if stack + // allocated or if the class layout does not guarantee that space is present. + SkBlockAllocator(GrowthPolicy policy, size_t blockIncrementBytes, + size_t additionalPreallocBytes = 0); + + ~SkBlockAllocator() { this->reset(); } + void operator delete(void* p) { ::operator delete(p); } + + /** + * Helper to calculate the minimum number of bytes needed for heap block size, under the + * assumption that Align will be the requested alignment of the first call to allocate(). + * Ex. To store N instances of T in a heap block, the 'blockIncrementBytes' should be set to + * BlockOverhead() + N * sizeof(T) when making the SkBlockAllocator. + */ + template + static constexpr size_t BlockOverhead(); + + /** + * Helper to calculate the minimum number of bytes needed for a preallocation, under the + * assumption that Align will be the requested alignment of the first call to allocate(). + * Ex. To preallocate a SkSBlockAllocator to hold N instances of T, its arge should be + * Overhead() + N * sizeof(T) + */ + template + static constexpr size_t Overhead(); + + /** + * Return the total number of bytes of the allocator, including its instance overhead, per-block + * overhead and space used for allocations. + */ + size_t totalSize() const; + /** + * Return the total number of bytes usable for allocations. This includes bytes that have + * been reserved already by a call to allocate() and bytes that are still available. It is + * totalSize() minus all allocator and block-level overhead. + */ + size_t totalUsableSpace() const; + /** + * Return the total number of usable bytes that have been reserved by allocations. This will + * be less than or equal to totalUsableSpace(). + */ + size_t totalSpaceInUse() const; + + /** + * Return the total number of bytes that were pre-allocated for the SkBlockAllocator. This will + * include 'additionalPreallocBytes' passed to the constructor, and represents what the total + * size would become after a call to reset(). + */ + size_t preallocSize() const { + // Don't double count fHead's Block overhead in both sizeof(SkBlockAllocator) and fSize. + return sizeof(SkBlockAllocator) + fHead.fSize - BaseHeadBlockSize(); + } + /** + * Return the usable size of the inline head block; this will be equal to + * 'additionalPreallocBytes' plus any alignment padding that the system had to add to Block. + * The returned value represents what could be allocated before a heap block is be created. + */ + size_t preallocUsableSpace() const { + return fHead.fSize - kDataStart; + } + + /** + * Get the current value of the allocator-level metadata (a user-oriented slot). This is + * separate from any block-level metadata, but can serve a similar purpose to compactly support + * data collections on top of SkBlockAllocator. + */ + int metadata() const { return fHead.fAllocatorMetadata; } + + /** + * Set the current value of the allocator-level metadata. + */ + void setMetadata(int value) { fHead.fAllocatorMetadata = value; } + + /** + * Reserve space that will hold 'size' bytes. This will automatically allocate a new block if + * there is not enough available space in the current block to provide 'size' bytes. The + * returned ByteRange tuple specifies the Block owning the reserved memory, the full byte range, + * and the aligned offset within that range to use for the user-facing pointer. The following + * invariants hold: + * + * 1. block->ptr(alignedOffset) is aligned to Align + * 2. end - alignedOffset == size + * 3. Padding <= alignedOffset - start <= Padding + Align - 1 + * + * Invariant #3, when Padding > 0, allows intermediate allocators to embed metadata along with + * the allocations. If the Padding bytes are used for some 'struct Meta', then + * ptr(alignedOffset - sizeof(Meta)) can be safely used as a Meta* if Meta's alignment + * requirements are less than or equal to the alignment specified in allocate<>. This can be + * easily guaranteed by using the pattern: + * + * allocate(userSize); + * + * This ensures that ptr(alignedOffset) will always satisfy UserAlign and + * ptr(alignedOffset - sizeof(Meta)) will always satisfy alignof(Meta). Alternatively, memcpy + * can be used to read and write values between start and alignedOffset without worrying about + * alignment requirements of the metadata. + * + * For over-aligned allocations, the alignedOffset (as an int) may not be a multiple of Align, + * but the result of ptr(alignedOffset) will be a multiple of Align. + */ + template + ByteRange allocate(size_t size); + + enum ReserveFlags : unsigned { + // If provided to reserve(), the input 'size' will be rounded up to the next size determined + // by the growth policy of the SkBlockAllocator. If not, 'size' will be aligned to max_align + kIgnoreGrowthPolicy_Flag = 0b01, + // If provided to reserve(), the number of available bytes of the current block will not + // be used to satisfy the reservation (assuming the contiguous range was long enough to + // begin with). + kIgnoreExistingBytes_Flag = 0b10, + + kNo_ReserveFlags = 0b00 + }; + + /** + * Ensure the block allocator has 'size' contiguous available bytes. After calling this + * function, currentBlock()->avail() may still report less than 'size' if the + * reserved space was added as a scratch block. This is done so that anything remaining in + * the current block can still be used if a smaller-than-size allocation is requested. If 'size' + * is requested by a subsequent allocation, the scratch block will automatically be activated + * and the request will not itself trigger any malloc. + * + * The optional 'flags' controls how the input size is allocated; by default it will attempt + * to use available contiguous bytes in the current block and will respect the growth policy + * of the allocator. + */ + template + void reserve(size_t size, ReserveFlags flags = kNo_ReserveFlags); + + /** + * Return a pointer to the start of the current block. This will never be null. + */ + const Block* currentBlock() const { return fTail; } + Block* currentBlock() { return fTail; } + + const Block* headBlock() const { return &fHead; } + Block* headBlock() { return &fHead; } + + /** + * Return the block that owns the allocated 'ptr'. Assuming that earlier, an allocation was + * returned as {b, start, alignedOffset, end}, and 'p = b->ptr(alignedOffset)', then a call + * to 'owningBlock(p, start) == b'. + * + * If calling code has already made a pointer to their metadata, i.e. 'm = p - Padding', then + * 'owningBlock(m, start)' will also return b, allowing you to recover the block from + * the metadata pointer. + * + * If calling code has access to the original alignedOffset, this function should not be used + * since the owning block is just 'p - alignedOffset', regardless of original Align or Padding. + */ + template + Block* owningBlock(const void* ptr, int start); + + template + const Block* owningBlock(const void* ptr, int start) const { + return const_cast(this)->owningBlock(ptr, start); + } + + /** + * Find the owning block of the allocated pointer, 'p'. Without any additional information this + * is O(N) on the number of allocated blocks. + */ + Block* findOwningBlock(const void* ptr); + const Block* findOwningBlock(const void* ptr) const { + return const_cast(this)->findOwningBlock(ptr); + } + + /** + * Explicitly free an entire block, invalidating any remaining allocations from the block. + * SkBlockAllocator will release all alive blocks automatically when it is destroyed, but this + * function can be used to reclaim memory over the lifetime of the allocator. The provided + * 'block' pointer must have previously come from a call to currentBlock() or allocate(). + * + * If 'block' represents the inline-allocated head block, its cursor and metadata are instead + * reset to their defaults. + * + * If the block is not the head block, it may be kept as a scratch block to be reused for + * subsequent allocation requests, instead of making an entirely new block. A scratch block is + * not visible when iterating over blocks but is reported in the total size of the allocator. + */ + void releaseBlock(Block* block); + + /** + * Detach every heap-allocated block owned by 'other' and concatenate them to this allocator's + * list of blocks. This memory is now managed by this allocator. Since this only transfers + * ownership of a Block, and a Block itself does not move, any previous allocations remain + * valid and associated with their original Block instances. SkBlockAllocator-level functions + * that accept allocated pointers (e.g. findOwningBlock), must now use this allocator and not + * 'other' for these allocations. + * + * The head block of 'other' cannot be stolen, so higher-level allocators and memory structures + * must handle that data differently. + */ + void stealHeapBlocks(SkBlockAllocator* other); + + /** + * Explicitly free all blocks (invalidating all allocations), and resets the head block to its + * default state. The allocator-level metadata is reset to 0 as well. + */ + void reset(); + + /** + * Remove any reserved scratch space, either from calling reserve() or releaseBlock(). + */ + void resetScratchSpace(); + + template class BlockIter; + + /** + * Clients can iterate over all active Blocks in the SkBlockAllocator using for loops: + * + * Forward iteration from head to tail block (or non-const variant): + * for (const Block* b : this->blocks()) { } + * Reverse iteration from tail to head block: + * for (const Block* b : this->rblocks()) { } + * + * It is safe to call releaseBlock() on the active block while looping. + */ + inline BlockIter blocks(); + inline BlockIter blocks() const; + inline BlockIter rblocks(); + inline BlockIter rblocks() const; + +#ifdef SK_DEBUG + inline static constexpr uint32_t kAssignedMarker = 0xBEEFFACE; + inline static constexpr uint32_t kFreedMarker = 0xCAFEBABE; + + void validate() const; +#endif + +private: + friend class BlockAllocatorTestAccess; + friend class TBlockListTestAccess; + + inline static constexpr int kDataStart = sizeof(Block); + #ifdef SK_FORCE_8_BYTE_ALIGNMENT + // This is an issue for WASM builds using emscripten, which had std::max_align_t = 16, but + // was returning pointers only aligned to 8 bytes. + // https://github.com/emscripten-core/emscripten/issues/10072 + // + // Setting this to 8 will let SkBlockAllocator properly correct for the pointer address if + // a 16-byte aligned allocation is requested in wasm (unlikely since we don't use long + // doubles). + inline static constexpr size_t kAddressAlign = 8; + #else + // The alignment Block addresses will be at when created using operator new + // (spec-compliant is pointers are aligned to max_align_t). + inline static constexpr size_t kAddressAlign = alignof(std::max_align_t); + #endif + + // Calculates the size of a new Block required to store a kMaxAllocationSize request for the + // given alignment and padding bytes. Also represents maximum valid fCursor value in a Block. + template + static constexpr size_t MaxBlockSize(); + + static constexpr int BaseHeadBlockSize() { + return sizeof(SkBlockAllocator) - offsetof(SkBlockAllocator, fHead); + } + + // Append a new block to the end of the block linked list, updating fTail. 'minSize' must + // have enough room for sizeof(Block). 'maxSize' is the upper limit of fSize for the new block + // that will preserve the static guarantees SkBlockAllocator makes. + void addBlock(int minSize, int maxSize); + + int scratchBlockSize() const { return fHead.fPrev ? fHead.fPrev->fSize : 0; } + + Block* fTail; // All non-head blocks are heap allocated; tail will never be null. + + // All remaining state is packed into 64 bits to keep SkBlockAllocator at 16 bytes + head block + // (on a 64-bit system). + + // Growth of the block size is controlled by four factors: BlockIncrement, N0 and N1, and a + // policy defining how N0 is updated. When a new block is needed, we calculate N1' = N0 + N1. + // Depending on the policy, N0' = N0 (no growth or linear growth), or N0' = N1 (Fibonacci), or + // N0' = N1' (exponential). The size of the new block is N1' * BlockIncrement * MaxAlign, + // after which fN0 and fN1 store N0' and N1' clamped into 23 bits. With current bit allocations, + // N1' is limited to 2^24, and assuming MaxAlign=16, then BlockIncrement must be '2' in order to + // eventually reach the hard 2^29 size limit of SkBlockAllocator. + + // Next heap block size = (fBlockIncrement * alignof(std::max_align_t) * (fN0 + fN1)) + uint64_t fBlockIncrement : 16; + uint64_t fGrowthPolicy : 2; // GrowthPolicy + uint64_t fN0 : 23; // = 1 for linear/exp.; = 0 for fixed/fibonacci, initially + uint64_t fN1 : 23; // = 1 initially + + // Inline head block, must be at the end so that it can utilize any additional reserved space + // from the initial allocation. + // The head block's prev pointer may be non-null, which signifies a scratch block that may be + // reused instead of allocating an entirely new block (this helps when allocate+release calls + // bounce back and forth across the capacity of a block). + alignas(kAddressAlign) Block fHead; + + static_assert(kGrowthPolicyCount <= 4); +}; + +// A wrapper around SkBlockAllocator that includes preallocated storage for the head block. +// N will be the preallocSize() reported by the allocator. +template +class SkSBlockAllocator : SkNoncopyable { +public: + using GrowthPolicy = SkBlockAllocator::GrowthPolicy; + + SkSBlockAllocator() { + new (fStorage) SkBlockAllocator(GrowthPolicy::kFixed, N, N - sizeof(SkBlockAllocator)); + } + explicit SkSBlockAllocator(GrowthPolicy policy) { + new (fStorage) SkBlockAllocator(policy, N, N - sizeof(SkBlockAllocator)); + } + + SkSBlockAllocator(GrowthPolicy policy, size_t blockIncrementBytes) { + new (fStorage) SkBlockAllocator(policy, blockIncrementBytes, N - sizeof(SkBlockAllocator)); + } + + ~SkSBlockAllocator() { + this->allocator()->~SkBlockAllocator(); + } + + SkBlockAllocator* operator->() { return this->allocator(); } + const SkBlockAllocator* operator->() const { return this->allocator(); } + + SkBlockAllocator* allocator() { return reinterpret_cast(fStorage); } + const SkBlockAllocator* allocator() const { + return reinterpret_cast(fStorage); + } + +private: + static_assert(N >= sizeof(SkBlockAllocator)); + + // Will be used to placement new the allocator + alignas(SkBlockAllocator) char fStorage[N]; +}; + +/////////////////////////////////////////////////////////////////////////////////////////////////// +// Template and inline implementations + +SK_MAKE_BITFIELD_OPS(SkBlockAllocator::ReserveFlags) + +template +constexpr size_t SkBlockAllocator::BlockOverhead() { + static_assert(SkAlignTo(kDataStart + Padding, Align) >= sizeof(Block)); + return SkAlignTo(kDataStart + Padding, Align); +} + +template +constexpr size_t SkBlockAllocator::Overhead() { + // NOTE: On most platforms, SkBlockAllocator is packed; this is not the case on debug builds + // due to extra fields, or on WASM due to 4byte pointers but 16byte max align. + return std::max(sizeof(SkBlockAllocator), + offsetof(SkBlockAllocator, fHead) + BlockOverhead()); +} + +template +constexpr size_t SkBlockAllocator::MaxBlockSize() { + // Without loss of generality, assumes 'align' will be the largest encountered alignment for the + // allocator (if it's not, the largest align will be encountered by the compiler and pass/fail + // the same set of static asserts). + return BlockOverhead() + kMaxAllocationSize; +} + +template +void SkBlockAllocator::reserve(size_t size, ReserveFlags flags) { + if (size > kMaxAllocationSize) { + SK_ABORT("Allocation too large (%zu bytes requested)", size); + } + int iSize = (int) size; + if ((flags & kIgnoreExistingBytes_Flag) || + this->currentBlock()->avail() < iSize) { + + int blockSize = BlockOverhead() + iSize; + int maxSize = (flags & kIgnoreGrowthPolicy_Flag) ? blockSize + : MaxBlockSize(); + SkASSERT((size_t) maxSize <= (MaxBlockSize())); + + SkDEBUGCODE(auto oldTail = fTail;) + this->addBlock(blockSize, maxSize); + SkASSERT(fTail != oldTail); + // Releasing the just added block will move it into scratch space, allowing the original + // tail's bytes to be used first before the scratch block is activated. + this->releaseBlock(fTail); + } +} + +template +SkBlockAllocator::ByteRange SkBlockAllocator::allocate(size_t size) { + // Amount of extra space for a new block to make sure the allocation can succeed. + static constexpr int kBlockOverhead = (int) BlockOverhead(); + + // Ensures 'offset' and 'end' calculations will be valid + static_assert((kMaxAllocationSize + SkAlignTo(MaxBlockSize(), Align)) + <= (size_t) std::numeric_limits::max()); + // Ensures size + blockOverhead + addBlock's alignment operations will be valid + static_assert(kMaxAllocationSize + kBlockOverhead + ((1 << 12) - 1) // 4K align for large blocks + <= std::numeric_limits::max()); + + if (size > kMaxAllocationSize) { + SK_ABORT("Allocation too large (%zu bytes requested)", size); + } + + int iSize = (int) size; + int offset = fTail->cursor(); + int end = offset + iSize; + if (end > fTail->fSize) { + this->addBlock(iSize + kBlockOverhead, MaxBlockSize()); + offset = fTail->cursor(); + end = offset + iSize; + } + + // Check invariants + SkASSERT(end <= fTail->fSize); + SkASSERT(end - offset == iSize); + SkASSERT(offset - fTail->fCursor >= (int) Padding && + offset - fTail->fCursor <= (int) (Padding + Align - 1)); + SkASSERT(reinterpret_cast(fTail->ptr(offset)) % Align == 0); + + int start = fTail->fCursor; + fTail->fCursor = end; + + fTail->unpoisonRange(offset - Padding, end); + + return {fTail, start, offset, end}; +} + +template +SkBlockAllocator::Block* SkBlockAllocator::owningBlock(const void* p, int start) { + // 'p' was originally formed by aligning 'block + start + Padding', producing the inequality: + // block + start + Padding <= p <= block + start + Padding + Align-1 + // Rearranging this yields: + // block <= p - start - Padding <= block + Align-1 + // Masking these terms by ~(Align-1) reconstructs 'block' if the alignment of the block is + // greater than or equal to Align (since block & ~(Align-1) == (block + Align-1) & ~(Align-1) + // in that case). Overalignment does not reduce to inequality unfortunately. + if /* constexpr */ (Align <= kAddressAlign) { + Block* block = reinterpret_cast( + (reinterpret_cast(p) - start - Padding) & ~(Align - 1)); + SkASSERT(block->fSentinel == kAssignedMarker); + return block; + } else { + // There's not a constant-time expression available to reconstruct the block from 'p', + // but this is unlikely to happen frequently. + return this->findOwningBlock(p); + } +} + +template +int SkBlockAllocator::Block::alignedOffset(int offset) const { + static_assert(SkIsPow2(Align)); + // Aligning adds (Padding + Align - 1) as an intermediate step, so ensure that can't overflow + static_assert(MaxBlockSize() + Padding + Align - 1 + <= (size_t) std::numeric_limits::max()); + + if /* constexpr */ (Align <= kAddressAlign) { + // Same as SkAlignTo, but operates on ints instead of size_t + return (offset + Padding + Align - 1) & ~(Align - 1); + } else { + // Must take into account that 'this' may be starting at a pointer that doesn't satisfy the + // larger alignment request, so must align the entire pointer, not just offset + uintptr_t blockPtr = reinterpret_cast(this); + uintptr_t alignedPtr = (blockPtr + offset + Padding + Align - 1) & ~(Align - 1); + SkASSERT(alignedPtr - blockPtr <= (uintptr_t) std::numeric_limits::max()); + return (int) (alignedPtr - blockPtr); + } +} + +bool SkBlockAllocator::Block::resize(int start, int end, int deltaBytes) { + SkASSERT(fSentinel == kAssignedMarker); + SkASSERT(start >= kDataStart && end <= fSize && start < end); + + if (deltaBytes > kMaxAllocationSize || deltaBytes < -kMaxAllocationSize) { + // Cannot possibly satisfy the resize and could overflow subsequent math + return false; + } + if (fCursor == end) { + int nextCursor = end + deltaBytes; + SkASSERT(nextCursor >= start); + // We still check nextCursor >= start for release builds that wouldn't assert. + if (nextCursor <= fSize && nextCursor >= start) { + if (nextCursor < fCursor) { + // The allocation got smaller; poison the space that can no longer be used. + this->poisonRange(nextCursor + 1, end); + } else { + // The allocation got larger; unpoison the space that can now be used. + this->unpoisonRange(end, nextCursor); + } + + fCursor = nextCursor; + return true; + } + } + return false; +} + +// NOTE: release is equivalent to resize(start, end, start - end), and the compiler can optimize +// most of the operations away, but it wasn't able to remove the unnecessary branch comparing the +// new cursor to the block size or old start, so release() gets a specialization. +bool SkBlockAllocator::Block::release(int start, int end) { + SkASSERT(fSentinel == kAssignedMarker); + SkASSERT(start >= kDataStart && end <= fSize && start < end); + + this->poisonRange(start, end); + + if (fCursor == end) { + fCursor = start; + return true; + } else { + return false; + } +} + +///////// Block iteration +template +class SkBlockAllocator::BlockIter { +private: + using BlockT = typename std::conditional::type; + using AllocatorT = + typename std::conditional::type; + +public: + BlockIter(AllocatorT* allocator) : fAllocator(allocator) {} + + class Item { + public: + bool operator!=(const Item& other) const { return fBlock != other.fBlock; } + + BlockT* operator*() const { return fBlock; } + + Item& operator++() { + this->advance(fNext); + return *this; + } + + private: + friend BlockIter; + + Item(BlockT* block) { this->advance(block); } + + void advance(BlockT* block) { + fBlock = block; + fNext = block ? (Forward ? block->fNext : block->fPrev) : nullptr; + if (!Forward && fNext && fNext->isScratch()) { + // For reverse-iteration only, we need to stop at the head, not the scratch block + // possibly stashed in head->prev. + fNext = nullptr; + } + SkASSERT(!fNext || !fNext->isScratch()); + } + + BlockT* fBlock; + // Cache this before operator++ so that fBlock can be released during iteration + BlockT* fNext; + }; + + Item begin() const { return Item(Forward ? &fAllocator->fHead : fAllocator->fTail); } + Item end() const { return Item(nullptr); } + +private: + AllocatorT* fAllocator; +}; + +SkBlockAllocator::BlockIter SkBlockAllocator::blocks() { + return BlockIter(this); +} +SkBlockAllocator::BlockIter SkBlockAllocator::blocks() const { + return BlockIter(this); +} +SkBlockAllocator::BlockIter SkBlockAllocator::rblocks() { + return BlockIter(this); +} +SkBlockAllocator::BlockIter SkBlockAllocator::rblocks() const { + return BlockIter(this); +} + +#endif // SkBlockAllocator_DEFINED diff --git a/gfx/skia/skia/src/base/SkBuffer.cpp b/gfx/skia/skia/src/base/SkBuffer.cpp new file mode 100644 index 0000000000..bb39782215 --- /dev/null +++ b/gfx/skia/skia/src/base/SkBuffer.cpp @@ -0,0 +1,90 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkBuffer.h" + +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkMalloc.h" + +#include + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +const void* SkRBuffer::skip(size_t size) { + if (fValid && size <= this->available()) { + const void* pos = fPos; + fPos += size; + return pos; + } + fValid = false; + return nullptr; +} + +bool SkRBuffer::read(void* buffer, size_t size) { + if (const void* src = this->skip(size)) { + sk_careful_memcpy(buffer, src, size); + return true; + } + return false; +} + +bool SkRBuffer::skipToAlign4() { + intptr_t pos = reinterpret_cast(fPos); + size_t n = SkAlign4(pos) - pos; + if (fValid && n <= this->available()) { + fPos += n; + return true; + } else { + fValid = false; + return false; + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void* SkWBuffer::skip(size_t size) { + void* result = fPos; + writeNoSizeCheck(nullptr, size); + return fData == nullptr ? nullptr : result; +} + +void SkWBuffer::writeNoSizeCheck(const void* buffer, size_t size) { + SkASSERT(fData == nullptr || fStop == nullptr || fPos + size <= fStop); + if (fData && buffer) { + sk_careful_memcpy(fPos, buffer, size); + } + fPos += size; +} + +size_t SkWBuffer::padToAlign4() { + size_t pos = this->pos(); + size_t n = SkAlign4(pos) - pos; + + if (n && fData) + { + char* p = fPos; + char* stop = p + n; + do { + *p++ = 0; + } while (p < stop); + } + fPos += n; + return n; +} + +#if 0 +#ifdef SK_DEBUG + static void AssertBuffer32(const void* buffer) + { + SkASSERT(buffer); + SkASSERT(((size_t)buffer & 3) == 0); + } +#else + #define AssertBuffer32(buffer) +#endif + +#endif diff --git a/gfx/skia/skia/src/base/SkBuffer.h b/gfx/skia/skia/src/base/SkBuffer.h new file mode 100644 index 0000000000..b30fda499d --- /dev/null +++ b/gfx/skia/skia/src/base/SkBuffer.h @@ -0,0 +1,134 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBuffer_DEFINED +#define SkBuffer_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkNoncopyable.h" +#include "src/base/SkSafeMath.h" + +#include +#include + +typedef float SkScalar; + +/** \class SkRBuffer + + Light weight class for reading data from a memory block. + The RBuffer is given the buffer to read from, with either a specified size + or no size (in which case no range checking is performed). It is iillegal + to attempt to read a value from an empty RBuffer (data == null). +*/ +class SkRBuffer : SkNoncopyable { +public: + SkRBuffer() : fData(nullptr), fPos(nullptr), fStop(nullptr) {} + + /** Initialize RBuffer with a data point and length. + */ + SkRBuffer(const void* data, size_t size) { + SkASSERT(data != nullptr || size == 0); + fData = (const char*)data; + fPos = (const char*)data; + fStop = (const char*)data + size; + } + + /** Return the number of bytes that have been read from the beginning + of the data pointer. + */ + size_t pos() const { return fPos - fData; } + /** Return the total size of the data pointer. Only defined if the length was + specified in the constructor or in a call to reset(). + */ + size_t size() const { return fStop - fData; } + /** Return true if the buffer has read to the end of the data pointer. + Only defined if the length was specified in the constructor or in a call + to reset(). Always returns true if the length was not specified. + */ + bool eof() const { return fPos >= fStop; } + + size_t available() const { return fStop - fPos; } + + bool isValid() const { return fValid; } + + /** Read the specified number of bytes from the data pointer. If buffer is not + null, copy those bytes into buffer. + */ + bool read(void* buffer, size_t size); + bool skipToAlign4(); + + bool readU8(uint8_t* x) { return this->read(x, 1); } + bool readS32(int32_t* x) { return this->read(x, 4); } + bool readU32(uint32_t* x) { return this->read(x, 4); } + + // returns nullptr on failure + const void* skip(size_t bytes); + template const T* skipCount(size_t count) { + return static_cast(this->skip(SkSafeMath::Mul(count, sizeof(T)))); + } + +private: + const char* fData; + const char* fPos; + const char* fStop; + bool fValid = true; +}; + +/** \class SkWBuffer + + Light weight class for writing data to a memory block. + The WBuffer is given the buffer to write into, with either a specified size + or no size, in which case no range checking is performed. An empty WBuffer + is legal, in which case no data is ever written, but the relative pos() + is updated. +*/ +class SkWBuffer : SkNoncopyable { +public: + SkWBuffer() : fData(nullptr), fPos(nullptr), fStop(nullptr) {} + SkWBuffer(void* data) { reset(data); } + SkWBuffer(void* data, size_t size) { reset(data, size); } + + void reset(void* data) { + fData = (char*)data; + fPos = (char*)data; + fStop = nullptr; // no bounds checking + } + + void reset(void* data, size_t size) { + SkASSERT(data != nullptr || size == 0); + fData = (char*)data; + fPos = (char*)data; + fStop = (char*)data + size; + } + + size_t pos() const { return fPos - fData; } + void* skip(size_t size); // return start of skipped data + + void write(const void* buffer, size_t size) { + if (size) { + this->writeNoSizeCheck(buffer, size); + } + } + + size_t padToAlign4(); + + void writePtr(const void* x) { this->writeNoSizeCheck(&x, sizeof(x)); } + void writeScalar(SkScalar x) { this->writeNoSizeCheck(&x, 4); } + void write32(int32_t x) { this->writeNoSizeCheck(&x, 4); } + void write16(int16_t x) { this->writeNoSizeCheck(&x, 2); } + void write8(int8_t x) { this->writeNoSizeCheck(&x, 1); } + void writeBool(bool x) { this->write8(x); } + +private: + void writeNoSizeCheck(const void* buffer, size_t size); + + char* fData; + char* fPos; + char* fStop; +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkContainers.cpp b/gfx/skia/skia/src/base/SkContainers.cpp new file mode 100644 index 0000000000..1e36a76ec4 --- /dev/null +++ b/gfx/skia/skia/src/base/SkContainers.cpp @@ -0,0 +1,107 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#include "include/private/base/SkContainers.h" + +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFeatures.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTo.h" + +#include +#include + +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) +#include +#elif defined(SK_BUILD_FOR_ANDROID) || (defined(SK_BUILD_FOR_UNIX) && !defined(__OpenBSD__)) +#include +#elif defined(SK_BUILD_FOR_WIN) +#include +#endif + +namespace { +// Return at least as many bytes to keep malloc aligned. +constexpr size_t kMinBytes = alignof(max_align_t); + +SkSpan complete_size(void* ptr, size_t size) { + if (ptr == nullptr) { + return {}; + } + + size_t completeSize = size; + + // Use the OS specific calls to find the actual capacity. + #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + // TODO: remove the max, when the chrome implementation of malloc_size doesn't return 0. + completeSize = std::max(malloc_size(ptr), size); + #elif defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 17 + completeSize = malloc_usable_size(ptr); + SkASSERT(completeSize >= size); + #elif defined(SK_BUILD_FOR_UNIX) && !defined(__OpenBSD__) + completeSize = malloc_usable_size(ptr); + SkASSERT(completeSize >= size); + #elif defined(SK_BUILD_FOR_WIN) + completeSize = _msize(ptr); + SkASSERT(completeSize >= size); + #endif + + return {static_cast(ptr), completeSize}; +} +} // namespace + +SkSpan SkContainerAllocator::allocate(int capacity, double growthFactor) { + SkASSERT(capacity >= 0); + SkASSERT(growthFactor >= 1.0); + SkASSERT_RELEASE(capacity <= fMaxCapacity); + + if (growthFactor > 1.0 && capacity > 0) { + capacity = this->growthFactorCapacity(capacity, growthFactor); + } + + return sk_allocate_throw(capacity * fSizeOfT); +} + +size_t SkContainerAllocator::roundUpCapacity(int64_t capacity) const { + SkASSERT(capacity >= 0); + + // If round will not go above fMaxCapacity return rounded capacity. + if (capacity < fMaxCapacity - kCapacityMultiple) { + return SkAlignTo(capacity, kCapacityMultiple); + } + + return SkToSizeT(fMaxCapacity); +} + +size_t SkContainerAllocator::growthFactorCapacity(int capacity, double growthFactor) const { + SkASSERT(capacity >= 0); + SkASSERT(growthFactor >= 1.0); + // Multiply by the growthFactor. Remember this must be done in 64-bit ints and not + // size_t because size_t changes. + const int64_t capacityGrowth = static_cast(capacity * growthFactor); + + // Notice that for small values of capacity, rounding up will provide most of the growth. + return this->roundUpCapacity(capacityGrowth); +} + + +SkSpan sk_allocate_canfail(size_t size) { + // Make sure to ask for at least the minimum number of bytes. + const size_t adjustedSize = std::max(size, kMinBytes); + void* ptr = sk_malloc_canfail(adjustedSize); + return complete_size(ptr, adjustedSize); +} + +SkSpan sk_allocate_throw(size_t size) { + if (size == 0) { + return {}; + } + // Make sure to ask for at least the minimum number of bytes. + const size_t adjustedSize = std::max(size, kMinBytes); + void* ptr = sk_malloc_throw(adjustedSize); + return complete_size(ptr, adjustedSize); +} + +void sk_report_container_overflow_and_die() { + SK_ABORT("Requested capacity is too large."); +} diff --git a/gfx/skia/skia/src/base/SkCubics.cpp b/gfx/skia/skia/src/base/SkCubics.cpp new file mode 100644 index 0000000000..64a4beb007 --- /dev/null +++ b/gfx/skia/skia/src/base/SkCubics.cpp @@ -0,0 +1,241 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkCubics.h" + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTPin.h" +#include "src/base/SkQuads.h" + +#include +#include + +static constexpr double PI = 3.141592653589793; + +static bool nearly_equal(double x, double y) { + if (sk_double_nearly_zero(x)) { + return sk_double_nearly_zero(y); + } + return sk_doubles_nearly_equal_ulps(x, y); +} + +// When the A coefficient of a cubic is close to 0, there can be floating point error +// that arises from computing a very large root. In those cases, we would rather be +// precise about the smaller 2 roots, so we have this arbitrary cutoff for when A is +// really small or small compared to B. +static bool close_to_a_quadratic(double A, double B) { + if (sk_double_nearly_zero(B)) { + return sk_double_nearly_zero(A); + } + return std::abs(A / B) < 1.0e-7; +} + +int SkCubics::RootsReal(double A, double B, double C, double D, double solution[3]) { + if (close_to_a_quadratic(A, B)) { + return SkQuads::RootsReal(B, C, D, solution); + } + if (sk_double_nearly_zero(D)) { // 0 is one root + int num = SkQuads::RootsReal(A, B, C, solution); + for (int i = 0; i < num; ++i) { + if (sk_double_nearly_zero(solution[i])) { + return num; + } + } + solution[num++] = 0; + return num; + } + if (sk_double_nearly_zero(A + B + C + D)) { // 1 is one root + int num = SkQuads::RootsReal(A, A + B, -D, solution); + for (int i = 0; i < num; ++i) { + if (sk_doubles_nearly_equal_ulps(solution[i], 1)) { + return num; + } + } + solution[num++] = 1; + return num; + } + double a, b, c; + { + // If A is zero (e.g. B was nan and thus close_to_a_quadratic was false), we will + // temporarily have infinities rolling about, but will catch that when checking + // R2MinusQ3. + double invA = sk_ieee_double_divide(1, A); + a = B * invA; + b = C * invA; + c = D * invA; + } + double a2 = a * a; + double Q = (a2 - b * 3) / 9; + double R = (2 * a2 * a - 9 * a * b + 27 * c) / 54; + double R2 = R * R; + double Q3 = Q * Q * Q; + double R2MinusQ3 = R2 - Q3; + // If one of R2 Q3 is infinite or nan, subtracting them will also be infinite/nan. + // If both are infinite or nan, the subtraction will be nan. + // In either case, we have no finite roots. + if (!std::isfinite(R2MinusQ3)) { + return 0; + } + double adiv3 = a / 3; + double r; + double* roots = solution; + if (R2MinusQ3 < 0) { // we have 3 real roots + // the divide/root can, due to finite precisions, be slightly outside of -1...1 + const double theta = acos(SkTPin(R / std::sqrt(Q3), -1., 1.)); + const double neg2RootQ = -2 * std::sqrt(Q); + + r = neg2RootQ * cos(theta / 3) - adiv3; + *roots++ = r; + + r = neg2RootQ * cos((theta + 2 * PI) / 3) - adiv3; + if (!nearly_equal(solution[0], r)) { + *roots++ = r; + } + r = neg2RootQ * cos((theta - 2 * PI) / 3) - adiv3; + if (!nearly_equal(solution[0], r) && + (roots - solution == 1 || !nearly_equal(solution[1], r))) { + *roots++ = r; + } + } else { // we have 1 real root + const double sqrtR2MinusQ3 = std::sqrt(R2MinusQ3); + A = fabs(R) + sqrtR2MinusQ3; + A = std::cbrt(A); // cube root + if (R > 0) { + A = -A; + } + if (!sk_double_nearly_zero(A)) { + A += Q / A; + } + r = A - adiv3; + *roots++ = r; + if (!sk_double_nearly_zero(R2) && + sk_doubles_nearly_equal_ulps(R2, Q3)) { + r = -A / 2 - adiv3; + if (!nearly_equal(solution[0], r)) { + *roots++ = r; + } + } + } + return static_cast(roots - solution); +} + +int SkCubics::RootsValidT(double A, double B, double C, double D, + double solution[3]) { + double allRoots[3] = {0, 0, 0}; + int realRoots = SkCubics::RootsReal(A, B, C, D, allRoots); + int foundRoots = 0; + for (int index = 0; index < realRoots; ++index) { + double tValue = allRoots[index]; + if (tValue >= 1.0 && tValue <= 1.00005) { + // Make sure we do not already have 1 (or something very close) in the list of roots. + if ((foundRoots < 1 || !sk_doubles_nearly_equal_ulps(solution[0], 1)) && + (foundRoots < 2 || !sk_doubles_nearly_equal_ulps(solution[1], 1))) { + solution[foundRoots++] = 1; + } + } else if (tValue >= -0.00005 && (tValue <= 0.0 || sk_double_nearly_zero(tValue))) { + // Make sure we do not already have 0 (or something very close) in the list of roots. + if ((foundRoots < 1 || !sk_double_nearly_zero(solution[0])) && + (foundRoots < 2 || !sk_double_nearly_zero(solution[1]))) { + solution[foundRoots++] = 0; + } + } else if (tValue > 0.0 && tValue < 1.0) { + solution[foundRoots++] = tValue; + } + } + return foundRoots; +} + +static bool approximately_zero(double x) { + // This cutoff for our binary search hopefully strikes a good balance between + // performance and accuracy. + return std::abs(x) < 0.00000001; +} + +static int find_extrema_valid_t(double A, double B, double C, + double t[2]) { + // To find the local min and max of a cubic, we take the derivative and + // solve when that is equal to 0. + // d/dt (A*t^3 + B*t^2 + C*t + D) = 3A*t^2 + 2B*t + C + double roots[2] = {0, 0}; + int numRoots = SkQuads::RootsReal(3*A, 2*B, C, roots); + int validRoots = 0; + for (int i = 0; i < numRoots; i++) { + double tValue = roots[i]; + if (tValue >= 0 && tValue <= 1.0) { + t[validRoots++] = tValue; + } + } + return validRoots; +} + +static double binary_search(double A, double B, double C, double D, double start, double stop) { + SkASSERT(start <= stop); + double left = SkCubics::EvalAt(A, B, C, D, start); + if (approximately_zero(left)) { + return start; + } + double right = SkCubics::EvalAt(A, B, C, D, stop); + if (!std::isfinite(left) || !std::isfinite(right)) { + return -1; // Not going to deal with one or more endpoints being non-finite. + } + if ((left > 0 && right > 0) || (left < 0 && right < 0)) { + return -1; // We can only have a root if one is above 0 and the other is below 0. + } + + constexpr int maxIterations = 1000; // prevent infinite loop + for (int i = 0; i < maxIterations; i++) { + double step = (start + stop) / 2; + double curr = SkCubics::EvalAt(A, B, C, D, step); + if (approximately_zero(curr)) { + return step; + } + if ((curr < 0 && left < 0) || (curr > 0 && left > 0)) { + // go right + start = step; + } else { + // go left + stop = step; + } + } + return -1; +} + +int SkCubics::BinarySearchRootsValidT(double A, double B, double C, double D, + double solution[3]) { + if (!std::isfinite(A) || !std::isfinite(B) || !std::isfinite(C) || !std::isfinite(D)) { + return 0; + } + double regions[4] = {0, 0, 0, 1}; + // Find local minima and maxima + double minMax[2] = {0, 0}; + int extremaCount = find_extrema_valid_t(A, B, C, minMax); + int startIndex = 2 - extremaCount; + if (extremaCount == 1) { + regions[startIndex + 1] = minMax[0]; + } + if (extremaCount == 2) { + // While the roots will be in the range 0 to 1 inclusive, they might not be sorted. + regions[startIndex + 1] = std::min(minMax[0], minMax[1]); + regions[startIndex + 2] = std::max(minMax[0], minMax[1]); + } + // Starting at regions[startIndex] and going up through regions[3], we have + // an ascending list of numbers in the range 0 to 1.0, between which are the possible + // locations of a root. + int foundRoots = 0; + for (;startIndex < 3; startIndex++) { + double root = binary_search(A, B, C, D, regions[startIndex], regions[startIndex + 1]); + if (root >= 0) { + // Check for duplicates + if ((foundRoots < 1 || !approximately_zero(solution[0] - root)) && + (foundRoots < 2 || !approximately_zero(solution[1] - root))) { + solution[foundRoots++] = root; + } + } + } + return foundRoots; +} diff --git a/gfx/skia/skia/src/base/SkCubics.h b/gfx/skia/skia/src/base/SkCubics.h new file mode 100644 index 0000000000..7e3cbbb567 --- /dev/null +++ b/gfx/skia/skia/src/base/SkCubics.h @@ -0,0 +1,61 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkCubics_DEFINED +#define SkCubics_DEFINED + +/** + * Utilities for dealing with cubic formulas with one variable: + * f(t) = A*t^3 + B*t^2 + C*t + d + */ +class SkCubics { +public: + /** + * Puts up to 3 real solutions to the equation + * A*t^3 + B*t^2 + C*t + d = 0 + * in the provided array and returns how many roots that was. + */ + static int RootsReal(double A, double B, double C, double D, + double solution[3]); + + /** + * Puts up to 3 real solutions to the equation + * A*t^3 + B*t^2 + C*t + D = 0 + * in the provided array, with the constraint that t is in the range [0.0, 1.0], + * and returns how many roots that was. + */ + static int RootsValidT(double A, double B, double C, double D, + double solution[3]); + + + /** + * Puts up to 3 real solutions to the equation + * A*t^3 + B*t^2 + C*t + D = 0 + * in the provided array, with the constraint that t is in the range [0.0, 1.0], + * and returns how many roots that was. + * This is a slower method than RootsValidT, but more accurate in circumstances + * where floating point error gets too big. + */ + static int BinarySearchRootsValidT(double A, double B, double C, double D, + double solution[3]); + + /** + * Evaluates the cubic function with the 4 provided coefficients and the + * provided variable. + */ + static double EvalAt(double A, double B, double C, double D, double t) { + return A * t * t * t + + B * t * t + + C * t + + D; + } + + static double EvalAt(double coefficients[4], double t) { + return EvalAt(coefficients[0], coefficients[1], coefficients[2], coefficients[3], t); + } +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkDeque.cpp b/gfx/skia/skia/src/base/SkDeque.cpp new file mode 100644 index 0000000000..ffff336f90 --- /dev/null +++ b/gfx/skia/skia/src/base/SkDeque.cpp @@ -0,0 +1,310 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDeque.h" +#include "include/private/base/SkMalloc.h" + +#include + +struct SkDeque::Block { + Block* fNext; + Block* fPrev; + char* fBegin; // start of used section in this chunk + char* fEnd; // end of used section in this chunk + char* fStop; // end of the allocated chunk + + char* start() { return (char*)(this + 1); } + const char* start() const { return (const char*)(this + 1); } + + void init(size_t size) { + fNext = fPrev = nullptr; + fBegin = fEnd = nullptr; + fStop = (char*)this + size; + } +}; + +SkDeque::SkDeque(size_t elemSize, int allocCount) + : fElemSize(elemSize) + , fInitialStorage(nullptr) + , fCount(0) + , fAllocCount(allocCount) { + SkASSERT(allocCount >= 1); + fFrontBlock = fBackBlock = nullptr; + fFront = fBack = nullptr; +} + +SkDeque::SkDeque(size_t elemSize, void* storage, size_t storageSize, int allocCount) + : fElemSize(elemSize) + , fInitialStorage(storage) + , fCount(0) + , fAllocCount(allocCount) { + SkASSERT(storageSize == 0 || storage != nullptr); + SkASSERT(allocCount >= 1); + + if (storageSize >= sizeof(Block) + elemSize) { + fFrontBlock = (Block*)storage; + fFrontBlock->init(storageSize); + } else { + fFrontBlock = nullptr; + } + fBackBlock = fFrontBlock; + fFront = fBack = nullptr; +} + +SkDeque::~SkDeque() { + Block* head = fFrontBlock; + Block* initialHead = (Block*)fInitialStorage; + + while (head) { + Block* next = head->fNext; + if (head != initialHead) { + this->freeBlock(head); + } + head = next; + } +} + +void* SkDeque::push_front() { + fCount += 1; + + if (nullptr == fFrontBlock) { + fFrontBlock = this->allocateBlock(fAllocCount); + fBackBlock = fFrontBlock; // update our linklist + } + + Block* first = fFrontBlock; + char* begin; + + if (nullptr == first->fBegin) { + INIT_CHUNK: + first->fEnd = first->fStop; + begin = first->fStop - fElemSize; + } else { + begin = first->fBegin - fElemSize; + if (begin < first->start()) { // no more room in this chunk + // should we alloc more as we accumulate more elements? + first = this->allocateBlock(fAllocCount); + first->fNext = fFrontBlock; + fFrontBlock->fPrev = first; + fFrontBlock = first; + goto INIT_CHUNK; + } + } + + first->fBegin = begin; + + if (nullptr == fFront) { + SkASSERT(nullptr == fBack); + fFront = fBack = begin; + } else { + SkASSERT(fBack); + fFront = begin; + } + + return begin; +} + +void* SkDeque::push_back() { + fCount += 1; + + if (nullptr == fBackBlock) { + fBackBlock = this->allocateBlock(fAllocCount); + fFrontBlock = fBackBlock; // update our linklist + } + + Block* last = fBackBlock; + char* end; + + if (nullptr == last->fBegin) { + INIT_CHUNK: + last->fBegin = last->start(); + end = last->fBegin + fElemSize; + } else { + end = last->fEnd + fElemSize; + if (end > last->fStop) { // no more room in this chunk + // should we alloc more as we accumulate more elements? + last = this->allocateBlock(fAllocCount); + last->fPrev = fBackBlock; + fBackBlock->fNext = last; + fBackBlock = last; + goto INIT_CHUNK; + } + } + + last->fEnd = end; + end -= fElemSize; + + if (nullptr == fBack) { + SkASSERT(nullptr == fFront); + fFront = fBack = end; + } else { + SkASSERT(fFront); + fBack = end; + } + + return end; +} + +void SkDeque::pop_front() { + SkASSERT(fCount > 0); + fCount -= 1; + + Block* first = fFrontBlock; + + SkASSERT(first != nullptr); + + if (first->fBegin == nullptr) { // we were marked empty from before + first = first->fNext; + SkASSERT(first != nullptr); // else we popped too far + first->fPrev = nullptr; + this->freeBlock(fFrontBlock); + fFrontBlock = first; + } + + char* begin = first->fBegin + fElemSize; + SkASSERT(begin <= first->fEnd); + + if (begin < fFrontBlock->fEnd) { + first->fBegin = begin; + SkASSERT(first->fBegin); + fFront = first->fBegin; + } else { + first->fBegin = first->fEnd = nullptr; // mark as empty + if (nullptr == first->fNext) { + fFront = fBack = nullptr; + } else { + SkASSERT(first->fNext->fBegin); + fFront = first->fNext->fBegin; + } + } +} + +void SkDeque::pop_back() { + SkASSERT(fCount > 0); + fCount -= 1; + + Block* last = fBackBlock; + + SkASSERT(last != nullptr); + + if (last->fEnd == nullptr) { // we were marked empty from before + last = last->fPrev; + SkASSERT(last != nullptr); // else we popped too far + last->fNext = nullptr; + this->freeBlock(fBackBlock); + fBackBlock = last; + } + + char* end = last->fEnd - fElemSize; + SkASSERT(end >= last->fBegin); + + if (end > last->fBegin) { + last->fEnd = end; + SkASSERT(last->fEnd); + fBack = last->fEnd - fElemSize; + } else { + last->fBegin = last->fEnd = nullptr; // mark as empty + if (nullptr == last->fPrev) { + fFront = fBack = nullptr; + } else { + SkASSERT(last->fPrev->fEnd); + fBack = last->fPrev->fEnd - fElemSize; + } + } +} + +int SkDeque::numBlocksAllocated() const { + int numBlocks = 0; + + for (const Block* temp = fFrontBlock; temp; temp = temp->fNext) { + ++numBlocks; + } + + return numBlocks; +} + +SkDeque::Block* SkDeque::allocateBlock(int allocCount) { + Block* newBlock = (Block*)sk_malloc_throw(sizeof(Block) + allocCount * fElemSize); + newBlock->init(sizeof(Block) + allocCount * fElemSize); + return newBlock; +} + +void SkDeque::freeBlock(Block* block) { + sk_free(block); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkDeque::Iter::Iter() : fCurBlock(nullptr), fPos(nullptr), fElemSize(0) {} + +SkDeque::Iter::Iter(const SkDeque& d, IterStart startLoc) { + this->reset(d, startLoc); +} + +// Due to how reset and next work, next actually returns the current element +// pointed to by fPos and then updates fPos to point to the next one. +void* SkDeque::Iter::next() { + char* pos = fPos; + + if (pos) { // if we were valid, try to move to the next setting + char* next = pos + fElemSize; + SkASSERT(next <= fCurBlock->fEnd); + if (next == fCurBlock->fEnd) { // exhausted this chunk, move to next + do { + fCurBlock = fCurBlock->fNext; + } while (fCurBlock != nullptr && fCurBlock->fBegin == nullptr); + next = fCurBlock ? fCurBlock->fBegin : nullptr; + } + fPos = next; + } + return pos; +} + +// Like next, prev actually returns the current element pointed to by fPos and +// then makes fPos point to the previous element. +void* SkDeque::Iter::prev() { + char* pos = fPos; + + if (pos) { // if we were valid, try to move to the prior setting + char* prev = pos - fElemSize; + SkASSERT(prev >= fCurBlock->fBegin - fElemSize); + if (prev < fCurBlock->fBegin) { // exhausted this chunk, move to prior + do { + fCurBlock = fCurBlock->fPrev; + } while (fCurBlock != nullptr && fCurBlock->fEnd == nullptr); + prev = fCurBlock ? fCurBlock->fEnd - fElemSize : nullptr; + } + fPos = prev; + } + return pos; +} + +// reset works by skipping through the spare blocks at the start (or end) +// of the doubly linked list until a non-empty one is found. The fPos +// member is then set to the first (or last) element in the block. If +// there are no elements in the deque both fCurBlock and fPos will come +// out of this routine nullptr. +void SkDeque::Iter::reset(const SkDeque& d, IterStart startLoc) { + fElemSize = d.fElemSize; + + if (kFront_IterStart == startLoc) { + // initialize the iterator to start at the front + fCurBlock = d.fFrontBlock; + while (fCurBlock && nullptr == fCurBlock->fBegin) { + fCurBlock = fCurBlock->fNext; + } + fPos = fCurBlock ? fCurBlock->fBegin : nullptr; + } else { + // initialize the iterator to start at the back + fCurBlock = d.fBackBlock; + while (fCurBlock && nullptr == fCurBlock->fEnd) { + fCurBlock = fCurBlock->fPrev; + } + fPos = fCurBlock ? fCurBlock->fEnd - fElemSize : nullptr; + } +} diff --git a/gfx/skia/skia/src/base/SkEndian.h b/gfx/skia/skia/src/base/SkEndian.h new file mode 100644 index 0000000000..732c248802 --- /dev/null +++ b/gfx/skia/skia/src/base/SkEndian.h @@ -0,0 +1,197 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEndian_DEFINED +#define SkEndian_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFeatures.h" + +#include + +/** \file SkEndian.h + + Macros and helper functions for handling 16 and 32 bit values in + big and little endian formats. +*/ + +#if defined(SK_CPU_LENDIAN) && defined(SK_CPU_BENDIAN) + #error "can't have both LENDIAN and BENDIAN defined" +#endif + +#if !defined(SK_CPU_LENDIAN) && !defined(SK_CPU_BENDIAN) + #error "need either LENDIAN or BENDIAN defined" +#endif + +/** Swap the two bytes in the low 16bits of the parameters. + e.g. 0x1234 -> 0x3412 +*/ +static inline uint16_t SkEndianSwap16(uint16_t value) { + return static_cast((value >> 8) | ((value & 0xFF) << 8)); +} + +template struct SkTEndianSwap16 { + static const uint16_t value = static_cast((N >> 8) | ((N & 0xFF) << 8)); +}; + +/** Vector version of SkEndianSwap16(), which swaps the + low two bytes of each value in the array. +*/ +static inline void SkEndianSwap16s(uint16_t array[], int count) { + SkASSERT(count == 0 || array != nullptr); + + while (--count >= 0) { + *array = SkEndianSwap16(*array); + array += 1; + } +} + +/** Reverse all 4 bytes in a 32bit value. + e.g. 0x12345678 -> 0x78563412 +*/ +static constexpr uint32_t SkEndianSwap32(uint32_t value) { + return ((value & 0xFF) << 24) | + ((value & 0xFF00) << 8) | + ((value & 0xFF0000) >> 8) | + (value >> 24); +} + +template struct SkTEndianSwap32 { + static const uint32_t value = ((N & 0xFF) << 24) | + ((N & 0xFF00) << 8) | + ((N & 0xFF0000) >> 8) | + (N >> 24); +}; + +/** Vector version of SkEndianSwap32(), which swaps the + bytes of each value in the array. +*/ +static inline void SkEndianSwap32s(uint32_t array[], int count) { + SkASSERT(count == 0 || array != nullptr); + + while (--count >= 0) { + *array = SkEndianSwap32(*array); + array += 1; + } +} + +/** Reverse all 8 bytes in a 64bit value. + e.g. 0x1122334455667788 -> 0x8877665544332211 +*/ +static inline uint64_t SkEndianSwap64(uint64_t value) { + return (((value & 0x00000000000000FFULL) << (8*7)) | + ((value & 0x000000000000FF00ULL) << (8*5)) | + ((value & 0x0000000000FF0000ULL) << (8*3)) | + ((value & 0x00000000FF000000ULL) << (8*1)) | + ((value & 0x000000FF00000000ULL) >> (8*1)) | + ((value & 0x0000FF0000000000ULL) >> (8*3)) | + ((value & 0x00FF000000000000ULL) >> (8*5)) | + ((value) >> (8*7))); +} +template struct SkTEndianSwap64 { + static const uint64_t value = (((N & 0x00000000000000FFULL) << (8*7)) | + ((N & 0x000000000000FF00ULL) << (8*5)) | + ((N & 0x0000000000FF0000ULL) << (8*3)) | + ((N & 0x00000000FF000000ULL) << (8*1)) | + ((N & 0x000000FF00000000ULL) >> (8*1)) | + ((N & 0x0000FF0000000000ULL) >> (8*3)) | + ((N & 0x00FF000000000000ULL) >> (8*5)) | + ((N) >> (8*7))); +}; + +/** Vector version of SkEndianSwap64(), which swaps the + bytes of each value in the array. +*/ +static inline void SkEndianSwap64s(uint64_t array[], int count) { + SkASSERT(count == 0 || array != nullptr); + + while (--count >= 0) { + *array = SkEndianSwap64(*array); + array += 1; + } +} + +#ifdef SK_CPU_LENDIAN + #define SkEndian_SwapBE16(n) SkEndianSwap16(n) + #define SkEndian_SwapBE32(n) SkEndianSwap32(n) + #define SkEndian_SwapBE64(n) SkEndianSwap64(n) + #define SkEndian_SwapLE16(n) (n) + #define SkEndian_SwapLE32(n) (n) + #define SkEndian_SwapLE64(n) (n) + + #define SkTEndian_SwapBE16(n) SkTEndianSwap16::value + #define SkTEndian_SwapBE32(n) SkTEndianSwap32::value + #define SkTEndian_SwapBE64(n) SkTEndianSwap64::value + #define SkTEndian_SwapLE16(n) (n) + #define SkTEndian_SwapLE32(n) (n) + #define SkTEndian_SwapLE64(n) (n) +#else // SK_CPU_BENDIAN + #define SkEndian_SwapBE16(n) (n) + #define SkEndian_SwapBE32(n) (n) + #define SkEndian_SwapBE64(n) (n) + #define SkEndian_SwapLE16(n) SkEndianSwap16(n) + #define SkEndian_SwapLE32(n) SkEndianSwap32(n) + #define SkEndian_SwapLE64(n) SkEndianSwap64(n) + + #define SkTEndian_SwapBE16(n) (n) + #define SkTEndian_SwapBE32(n) (n) + #define SkTEndian_SwapBE64(n) (n) + #define SkTEndian_SwapLE16(n) SkTEndianSwap16::value + #define SkTEndian_SwapLE32(n) SkTEndianSwap32::value + #define SkTEndian_SwapLE64(n) SkTEndianSwap64::value +#endif + +// When a bytestream is embedded in a 32-bit word, how far we need to +// shift the word to extract each byte from the low 8 bits by anding with 0xff. +#ifdef SK_CPU_LENDIAN + #define SkEndian_Byte0Shift 0 + #define SkEndian_Byte1Shift 8 + #define SkEndian_Byte2Shift 16 + #define SkEndian_Byte3Shift 24 +#else // SK_CPU_BENDIAN + #define SkEndian_Byte0Shift 24 + #define SkEndian_Byte1Shift 16 + #define SkEndian_Byte2Shift 8 + #define SkEndian_Byte3Shift 0 +#endif + + +#if defined(SK_UINT8_BITFIELD_LENDIAN) && defined(SK_UINT8_BITFIELD_BENDIAN) + #error "can't have both bitfield LENDIAN and BENDIAN defined" +#endif + +#if !defined(SK_UINT8_BITFIELD_LENDIAN) && !defined(SK_UINT8_BITFIELD_BENDIAN) + #ifdef SK_CPU_LENDIAN + #define SK_UINT8_BITFIELD_LENDIAN + #else + #define SK_UINT8_BITFIELD_BENDIAN + #endif +#endif + +#ifdef SK_UINT8_BITFIELD_LENDIAN + #define SK_UINT8_BITFIELD(f0, f1, f2, f3, f4, f5, f6, f7) \ + SK_OT_BYTE f0 : 1; \ + SK_OT_BYTE f1 : 1; \ + SK_OT_BYTE f2 : 1; \ + SK_OT_BYTE f3 : 1; \ + SK_OT_BYTE f4 : 1; \ + SK_OT_BYTE f5 : 1; \ + SK_OT_BYTE f6 : 1; \ + SK_OT_BYTE f7 : 1; +#else + #define SK_UINT8_BITFIELD(f0, f1, f2, f3, f4, f5, f6, f7) \ + SK_OT_BYTE f7 : 1; \ + SK_OT_BYTE f6 : 1; \ + SK_OT_BYTE f5 : 1; \ + SK_OT_BYTE f4 : 1; \ + SK_OT_BYTE f3 : 1; \ + SK_OT_BYTE f2 : 1; \ + SK_OT_BYTE f1 : 1; \ + SK_OT_BYTE f0 : 1; +#endif + +#endif diff --git a/gfx/skia/skia/src/base/SkFloatingPoint.cpp b/gfx/skia/skia/src/base/SkFloatingPoint.cpp new file mode 100644 index 0000000000..3e3d91d6e5 --- /dev/null +++ b/gfx/skia/skia/src/base/SkFloatingPoint.cpp @@ -0,0 +1,51 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkFloatingPoint.h" + +#include "include/private/base/SkAssert.h" + +#include + +static inline int64_t double_to_twos_complement_bits(double x) { + // Convert a double to its bit pattern + int64_t bits = 0; + static_assert(sizeof(x) == sizeof(bits)); + std::memcpy(&bits, &x, sizeof(bits)); + // Convert a sign-bit int (i.e. double interpreted as int) into a 2s complement + // int. This also converts -0 (0x8000000000000000) to 0. Doing this to a double allows + // it to be compared using normal C operators (<, <=, etc.) + if (bits < 0) { + bits &= 0x7FFFFFFFFFFFFFFF; + bits = -bits; + } + return bits; +} + +// Arbitrarily chosen. +constexpr static double sk_double_epsilon = 0.0000000001; + +bool sk_doubles_nearly_equal_ulps(double a, double b, uint8_t max_ulps_diff) { + // If both of these are zero (or very close), then using Units of Least Precision + // will not be accurate and we should use sk_double_nearly_zero instead. + SkASSERT(!(fabs(a) < sk_double_epsilon && fabs(b) < sk_double_epsilon)); + // This algorithm does not work if both inputs are NaN. + SkASSERT(!(std::isnan(a) && std::isnan(b))); + // If both inputs are infinity (or actually equal), this catches it. + if (a == b) { + return true; + } + int64_t aBits = double_to_twos_complement_bits(a); + int64_t bBits = double_to_twos_complement_bits(b); + + // Find the difference in Units of Least Precision (ULPs). + return aBits < bBits + max_ulps_diff && bBits < aBits + max_ulps_diff; +} + +bool sk_double_nearly_zero(double a) { + return a == 0 || fabs(a) < sk_double_epsilon; +} diff --git a/gfx/skia/skia/src/base/SkHalf.cpp b/gfx/skia/skia/src/base/SkHalf.cpp new file mode 100644 index 0000000000..024daa29b8 --- /dev/null +++ b/gfx/skia/skia/src/base/SkHalf.cpp @@ -0,0 +1,97 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkFloatBits.h" +#include "src/base/SkHalf.h" + +uint16_t halfMantissa(SkHalf h) { + return h & 0x03ff; +} + +uint16_t halfExponent(SkHalf h) { + return (h >> 10) & 0x001f; +} + +uint16_t halfSign(SkHalf h) { + return h >> 15; +} + +union FloatUIntUnion { + uint32_t fUInt; // this must come first for the initializations below to work + float fFloat; +}; + +// based on Fabien Giesen's float_to_half_fast3() +// see https://gist.github.com/rygorous/2156668 +SkHalf SkFloatToHalf(float f) { + static const uint32_t f32infty = { 255 << 23 }; + static const uint32_t f16infty = { 31 << 23 }; + static const FloatUIntUnion magic = { 15 << 23 }; + static const uint32_t sign_mask = 0x80000000u; + static const uint32_t round_mask = ~0xfffu; + SkHalf o = 0; + + FloatUIntUnion floatUnion; + floatUnion.fFloat = f; + + uint32_t sign = floatUnion.fUInt & sign_mask; + floatUnion.fUInt ^= sign; + + // NOTE all the integer compares in this function can be safely + // compiled into signed compares since all operands are below + // 0x80000000. Important if you want fast straight SSE2 code + // (since there's no unsigned PCMPGTD). + + // Inf or NaN (all exponent bits set) + if (floatUnion.fUInt >= f32infty) + // NaN->qNaN and Inf->Inf + o = (floatUnion.fUInt > f32infty) ? 0x7e00 : 0x7c00; + // (De)normalized number or zero + else { + floatUnion.fUInt &= round_mask; + floatUnion.fFloat *= magic.fFloat; + floatUnion.fUInt -= round_mask; + // Clamp to signed infinity if overflowed + if (floatUnion.fUInt > f16infty) { + floatUnion.fUInt = f16infty; + } + + o = floatUnion.fUInt >> 13; // Take the bits! + } + + o |= sign >> 16; + return o; +} + +// based on Fabien Giesen's half_to_float_fast2() +// see https://fgiesen.wordpress.com/2012/03/28/half-to-float-done-quic/ +float SkHalfToFloat(SkHalf h) { + static const FloatUIntUnion magic = { 126 << 23 }; + FloatUIntUnion o; + + if (halfExponent(h) == 0) + { + // Zero / Denormal + o.fUInt = magic.fUInt + halfMantissa(h); + o.fFloat -= magic.fFloat; + } + else + { + // Set mantissa + o.fUInt = halfMantissa(h) << 13; + // Set exponent + if (halfExponent(h) == 0x1f) + // Inf/NaN + o.fUInt |= (255 << 23); + else + o.fUInt |= ((127 - 15 + halfExponent(h)) << 23); + } + + // Set sign + o.fUInt |= (halfSign(h) << 31); + return o.fFloat; +} diff --git a/gfx/skia/skia/src/base/SkHalf.h b/gfx/skia/skia/src/base/SkHalf.h new file mode 100644 index 0000000000..d88c80d9db --- /dev/null +++ b/gfx/skia/skia/src/base/SkHalf.h @@ -0,0 +1,37 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkHalf_DEFINED +#define SkHalf_DEFINED + +#include "src/base/SkVx.h" + +// 16-bit floating point value +// format is 1 bit sign, 5 bits exponent, 10 bits mantissa +// only used for storage +typedef uint16_t SkHalf; + +static constexpr uint16_t SK_HalfMin = 0x0400; // 2^-14 (minimum positive normal value) +static constexpr uint16_t SK_HalfMax = 0x7bff; // 65504 +static constexpr uint16_t SK_HalfEpsilon = 0x1400; // 2^-10 +static constexpr uint16_t SK_Half1 = 0x3C00; // 1 + +// convert between half and single precision floating point +float SkHalfToFloat(SkHalf h); +SkHalf SkFloatToHalf(float f); + +// Convert between half and single precision floating point, +// assuming inputs and outputs are both finite, and may +// flush values which would be denormal half floats to zero. +static inline skvx::float4 SkHalfToFloat_finite_ftz(uint64_t rgba) { + return skvx::from_half(skvx::half4::Load(&rgba)); +} +static inline skvx::half4 SkFloatToHalf_finite_ftz(const skvx::float4& c) { + return skvx::to_half(c); +} + +#endif diff --git a/gfx/skia/skia/src/base/SkLeanWindows.h b/gfx/skia/skia/src/base/SkLeanWindows.h new file mode 100644 index 0000000000..d43150db76 --- /dev/null +++ b/gfx/skia/skia/src/base/SkLeanWindows.h @@ -0,0 +1,35 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkLeanWindows_DEFINED +#define SkLeanWindows_DEFINED + +#include "include/private/base/SkFeatures.h" // IWYU pragma: keep + +#ifdef SK_BUILD_FOR_WIN +// https://devblogs.microsoft.com/oldnewthing/20091130-00/?p=15863 +# ifndef WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +# define WIN32_IS_MEAN_WAS_LOCALLY_DEFINED +# endif +# ifndef NOMINMAX +# define NOMINMAX +# define NOMINMAX_WAS_LOCALLY_DEFINED +# endif +# +# include +# +# ifdef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED +# undef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED +# undef WIN32_LEAN_AND_MEAN +# endif +# ifdef NOMINMAX_WAS_LOCALLY_DEFINED +# undef NOMINMAX_WAS_LOCALLY_DEFINED +# undef NOMINMAX +# endif +#endif + +#endif // SkLeanWindows_DEFINED diff --git a/gfx/skia/skia/src/base/SkMSAN.h b/gfx/skia/skia/src/base/SkMSAN.h new file mode 100644 index 0000000000..85fa2fce4b --- /dev/null +++ b/gfx/skia/skia/src/base/SkMSAN.h @@ -0,0 +1,43 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMSAN_DEFINED +#define SkMSAN_DEFINED + +#include "include/private/base/SkAssert.h" + +#include +#include + +// Typically declared in LLVM's msan_interface.h. Easier for us to just re-declare. +extern "C" { + void __msan_check_mem_is_initialized(const volatile void*, size_t); + void __msan_unpoison (const volatile void*, size_t); +} + +// Code that requires initialized inputs can call this to make it clear that +// the blame for use of uninitialized data belongs further up the call stack. +static inline void sk_msan_assert_initialized(const void* begin, const void* end) { +#if defined(__has_feature) + #if __has_feature(memory_sanitizer) + __msan_check_mem_is_initialized(begin, (const char*)end - (const char*)begin); + #endif +#endif +} + +// Lie to MSAN that this range of memory is initialized. +// This can hide serious problems if overused. Every use of this should refer to a bug. +static inline void sk_msan_mark_initialized(const void* begin, const void* end, const char* skbug) { + SkASSERT(skbug && 0 != strcmp(skbug, "")); +#if defined(__has_feature) + #if __has_feature(memory_sanitizer) + __msan_unpoison(begin, (const char*)end - (const char*)begin); + #endif +#endif +} + +#endif//SkMSAN_DEFINED diff --git a/gfx/skia/skia/src/base/SkMalloc.cpp b/gfx/skia/skia/src/base/SkMalloc.cpp new file mode 100644 index 0000000000..944b4847b7 --- /dev/null +++ b/gfx/skia/skia/src/base/SkMalloc.cpp @@ -0,0 +1,22 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#include "include/private/base/SkMalloc.h" + +#include "src/base/SkSafeMath.h" + +void* sk_calloc_throw(size_t count, size_t elemSize) { + return sk_calloc_throw(SkSafeMath::Mul(count, elemSize)); +} + +void* sk_malloc_throw(size_t count, size_t elemSize) { + return sk_malloc_throw(SkSafeMath::Mul(count, elemSize)); +} + +void* sk_realloc_throw(void* buffer, size_t count, size_t elemSize) { + return sk_realloc_throw(buffer, SkSafeMath::Mul(count, elemSize)); +} + +void* sk_malloc_canfail(size_t count, size_t elemSize) { + return sk_malloc_canfail(SkSafeMath::Mul(count, elemSize)); +} diff --git a/gfx/skia/skia/src/base/SkMathPriv.cpp b/gfx/skia/skia/src/base/SkMathPriv.cpp new file mode 100644 index 0000000000..2674e69886 --- /dev/null +++ b/gfx/skia/skia/src/base/SkMathPriv.cpp @@ -0,0 +1,73 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkMathPriv.h" + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFloatingPoint.h" + +#include +#include + +/////////////////////////////////////////////////////////////////////////////// + +/* www.worldserver.com/turk/computergraphics/FixedSqrt.pdf +*/ +int32_t SkSqrtBits(int32_t x, int count) { + SkASSERT(x >= 0 && count > 0 && (unsigned)count <= 30); + + uint32_t root = 0; + uint32_t remHi = 0; + uint32_t remLo = x; + + do { + root <<= 1; + + remHi = (remHi<<2) | (remLo>>30); + remLo <<= 2; + + uint32_t testDiv = (root << 1) + 1; + if (remHi >= testDiv) { + remHi -= testDiv; + root++; + } + } while (--count >= 0); + + return root; +} + +// Kernighan's method +int SkPopCount_portable(uint32_t n) { + int count = 0; + + while (n) { + n &= (n - 1); // Remove the lowest bit in the integer. + count++; + } + return count; +} + +// Here we strip off the unwanted bits and then return the number of trailing zero bits +int SkNthSet(uint32_t target, int n) { + SkASSERT(n < SkPopCount(target)); + + for (int i = 0; i < n; ++i) { + target &= (target - 1); // Remove the lowest bit in the integer. + } + + return SkCTZ(target); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +bool sk_floats_are_unit(const float array[], size_t count) { + bool is_unit = true; + for (size_t i = 0; i < count; ++i) { + is_unit &= (array[i] >= 0) & (array[i] <= 1); + } + return is_unit; +} diff --git a/gfx/skia/skia/src/base/SkMathPriv.h b/gfx/skia/skia/src/base/SkMathPriv.h new file mode 100644 index 0000000000..0bcb113b6d --- /dev/null +++ b/gfx/skia/skia/src/base/SkMathPriv.h @@ -0,0 +1,346 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMathPriv_DEFINED +#define SkMathPriv_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkTemplates.h" + +#include +#include + +/** + * Return the integer square root of value, with a bias of bitBias + */ +int32_t SkSqrtBits(int32_t value, int bitBias); + +/** Return the integer square root of n, treated as a SkFixed (16.16) + */ +static inline int32_t SkSqrt32(int32_t n) { return SkSqrtBits(n, 15); } + +/** + * Returns (value < 0 ? 0 : value) efficiently (i.e. no compares or branches) + */ +static inline int SkClampPos(int value) { + return value & ~(value >> 31); +} + +/** + * Stores numer/denom and numer%denom into div and mod respectively. + */ +template +inline void SkTDivMod(In numer, In denom, Out* div, Out* mod) { +#ifdef SK_CPU_ARM32 + // If we wrote this as in the else branch, GCC won't fuse the two into one + // divmod call, but rather a div call followed by a divmod. Silly! This + // version is just as fast as calling __aeabi_[u]idivmod manually, but with + // prettier code. + // + // This benches as around 2x faster than the code in the else branch. + const In d = numer/denom; + *div = static_cast(d); + *mod = static_cast(numer-d*denom); +#else + // On x86 this will just be a single idiv. + *div = static_cast(numer/denom); + *mod = static_cast(numer%denom); +#endif +} + +/** Returns -1 if n < 0, else returns 0 + */ +#define SkExtractSign(n) ((int32_t)(n) >> 31) + +/** If sign == -1, returns -n, else sign must be 0, and returns n. + Typically used in conjunction with SkExtractSign(). + */ +static inline int32_t SkApplySign(int32_t n, int32_t sign) { + SkASSERT(sign == 0 || sign == -1); + return (n ^ sign) - sign; +} + +/** Return x with the sign of y */ +static inline int32_t SkCopySign32(int32_t x, int32_t y) { + return SkApplySign(x, SkExtractSign(x ^ y)); +} + +/** Given a positive value and a positive max, return the value + pinned against max. + Note: only works as long as max - value doesn't wrap around + @return max if value >= max, else value + */ +static inline unsigned SkClampUMax(unsigned value, unsigned max) { + if (value > max) { + value = max; + } + return value; +} + +// If a signed int holds min_int (e.g. 0x80000000) it is undefined what happens when +// we negate it (even though we *know* we're 2's complement and we'll get the same +// value back). So we create this helper function that casts to size_t (unsigned) first, +// to avoid the complaint. +static inline size_t sk_negate_to_size_t(int32_t value) { +#if defined(_MSC_VER) +#pragma warning(push) +#pragma warning(disable : 4146) // Thanks MSVC, we know what we're negating an unsigned +#endif + return -static_cast(value); +#if defined(_MSC_VER) +#pragma warning(pop) +#endif +} + +/////////////////////////////////////////////////////////////////////////////// + +/** Return a*b/255, truncating away any fractional bits. Only valid if both + a and b are 0..255 + */ +static inline U8CPU SkMulDiv255Trunc(U8CPU a, U8CPU b) { + SkASSERT((uint8_t)a == a); + SkASSERT((uint8_t)b == b); + unsigned prod = a*b + 1; + return (prod + (prod >> 8)) >> 8; +} + +/** Return (a*b)/255, taking the ceiling of any fractional bits. Only valid if + both a and b are 0..255. The expected result equals (a * b + 254) / 255. + */ +static inline U8CPU SkMulDiv255Ceiling(U8CPU a, U8CPU b) { + SkASSERT((uint8_t)a == a); + SkASSERT((uint8_t)b == b); + unsigned prod = a*b + 255; + return (prod + (prod >> 8)) >> 8; +} + +/** Just the rounding step in SkDiv255Round: round(value / 255) + */ +static inline unsigned SkDiv255Round(unsigned prod) { + prod += 128; + return (prod + (prod >> 8)) >> 8; +} + +/** + * Swap byte order of a 4-byte value, e.g. 0xaarrggbb -> 0xbbggrraa. + */ +#if defined(_MSC_VER) + #include + static inline uint32_t SkBSwap32(uint32_t v) { return _byteswap_ulong(v); } +#else + static inline uint32_t SkBSwap32(uint32_t v) { return __builtin_bswap32(v); } +#endif + +/* + * Return the number of set bits (i.e., the population count) in the provided uint32_t. + */ +int SkPopCount_portable(uint32_t n); + +#if defined(__GNUC__) || defined(__clang__) + static inline int SkPopCount(uint32_t n) { + return __builtin_popcount(n); + } +#else + static inline int SkPopCount(uint32_t n) { + return SkPopCount_portable(n); + } +#endif + +/* + * Return the 0-based index of the nth bit set in target + * Returns 32 if there is no nth bit set. + */ +int SkNthSet(uint32_t target, int n); + +//! Returns the number of leading zero bits (0...32) +// From Hacker's Delight 2nd Edition +constexpr int SkCLZ_portable(uint32_t x) { + int n = 32; + uint32_t y = x >> 16; if (y != 0) {n -= 16; x = y;} + y = x >> 8; if (y != 0) {n -= 8; x = y;} + y = x >> 4; if (y != 0) {n -= 4; x = y;} + y = x >> 2; if (y != 0) {n -= 2; x = y;} + y = x >> 1; if (y != 0) {return n - 2;} + return n - static_cast(x); +} + +static_assert(32 == SkCLZ_portable(0)); +static_assert(31 == SkCLZ_portable(1)); +static_assert( 1 == SkCLZ_portable(1 << 30)); +static_assert( 1 == SkCLZ_portable((1 << 30) | (1 << 24) | 1)); +static_assert( 0 == SkCLZ_portable(~0U)); + +#if defined(SK_BUILD_FOR_WIN) + #include + + static inline int SkCLZ(uint32_t mask) { + if (mask) { + unsigned long index = 0; + _BitScanReverse(&index, mask); + // Suppress this bogus /analyze warning. The check for non-zero + // guarantees that _BitScanReverse will succeed. + #pragma warning(suppress : 6102) // Using 'index' from failed function call + return index ^ 0x1F; + } else { + return 32; + } + } +#elif defined(SK_CPU_ARM32) || defined(__GNUC__) || defined(__clang__) + static inline int SkCLZ(uint32_t mask) { + // __builtin_clz(0) is undefined, so we have to detect that case. + return mask ? __builtin_clz(mask) : 32; + } +#else + static inline int SkCLZ(uint32_t mask) { + return SkCLZ_portable(mask); + } +#endif + +//! Returns the number of trailing zero bits (0...32) +// From Hacker's Delight 2nd Edition +constexpr int SkCTZ_portable(uint32_t x) { + return 32 - SkCLZ_portable(~x & (x - 1)); +} + +static_assert(32 == SkCTZ_portable(0)); +static_assert( 0 == SkCTZ_portable(1)); +static_assert(30 == SkCTZ_portable(1 << 30)); +static_assert( 2 == SkCTZ_portable((1 << 30) | (1 << 24) | (1 << 2))); +static_assert( 0 == SkCTZ_portable(~0U)); + +#if defined(SK_BUILD_FOR_WIN) + #include + + static inline int SkCTZ(uint32_t mask) { + if (mask) { + unsigned long index = 0; + _BitScanForward(&index, mask); + // Suppress this bogus /analyze warning. The check for non-zero + // guarantees that _BitScanReverse will succeed. + #pragma warning(suppress : 6102) // Using 'index' from failed function call + return index; + } else { + return 32; + } + } +#elif defined(SK_CPU_ARM32) || defined(__GNUC__) || defined(__clang__) + static inline int SkCTZ(uint32_t mask) { + // __builtin_ctz(0) is undefined, so we have to detect that case. + return mask ? __builtin_ctz(mask) : 32; + } +#else + static inline int SkCTZ(uint32_t mask) { + return SkCTZ_portable(mask); + } +#endif + +/** + * Returns the log2 of the specified value, were that value to be rounded up + * to the next power of 2. It is undefined to pass 0. Examples: + * SkNextLog2(1) -> 0 + * SkNextLog2(2) -> 1 + * SkNextLog2(3) -> 2 + * SkNextLog2(4) -> 2 + * SkNextLog2(5) -> 3 + */ +static inline int SkNextLog2(uint32_t value) { + SkASSERT(value != 0); + return 32 - SkCLZ(value - 1); +} + +constexpr int SkNextLog2_portable(uint32_t value) { + SkASSERT(value != 0); + return 32 - SkCLZ_portable(value - 1); +} + +/** +* Returns the log2 of the specified value, were that value to be rounded down +* to the previous power of 2. It is undefined to pass 0. Examples: +* SkPrevLog2(1) -> 0 +* SkPrevLog2(2) -> 1 +* SkPrevLog2(3) -> 1 +* SkPrevLog2(4) -> 2 +* SkPrevLog2(5) -> 2 +*/ +static inline int SkPrevLog2(uint32_t value) { + SkASSERT(value != 0); + return 32 - SkCLZ(value >> 1); +} + +constexpr int SkPrevLog2_portable(uint32_t value) { + SkASSERT(value != 0); + return 32 - SkCLZ_portable(value >> 1); +} + +/** + * Returns the smallest power-of-2 that is >= the specified value. If value + * is already a power of 2, then it is returned unchanged. It is undefined + * if value is <= 0. + */ +static inline int SkNextPow2(int value) { + SkASSERT(value > 0); + return 1 << SkNextLog2(static_cast(value)); +} + +constexpr int SkNextPow2_portable(int value) { + SkASSERT(value > 0); + return 1 << SkNextLog2_portable(static_cast(value)); +} + +/** +* Returns the largest power-of-2 that is <= the specified value. If value +* is already a power of 2, then it is returned unchanged. It is undefined +* if value is <= 0. +*/ +static inline int SkPrevPow2(int value) { + SkASSERT(value > 0); + return 1 << SkPrevLog2(static_cast(value)); +} + +constexpr int SkPrevPow2_portable(int value) { + SkASSERT(value > 0); + return 1 << SkPrevLog2_portable(static_cast(value)); +} + +/////////////////////////////////////////////////////////////////////////////// + +/** + * Return the smallest power-of-2 >= n. + */ +static inline uint32_t GrNextPow2(uint32_t n) { + return n ? (1 << (32 - SkCLZ(n - 1))) : 1; +} + +/** + * Returns the next power of 2 >= n or n if the next power of 2 can't be represented by size_t. + */ +static inline size_t GrNextSizePow2(size_t n) { + constexpr int kNumSizeTBits = 8 * sizeof(size_t); + constexpr size_t kHighBitSet = size_t(1) << (kNumSizeTBits - 1); + + if (!n) { + return 1; + } else if (n >= kHighBitSet) { + return n; + } + + n--; + uint32_t shift = 1; + while (shift < kNumSizeTBits) { + n |= n >> shift; + shift <<= 1; + } + return n + 1; +} + +// conservative check. will return false for very large values that "could" fit +template static inline bool SkFitsInFixed(T x) { + return SkTAbs(x) <= 32767.0f; +} + +#endif diff --git a/gfx/skia/skia/src/base/SkQuads.cpp b/gfx/skia/skia/src/base/SkQuads.cpp new file mode 100644 index 0000000000..a77837932c --- /dev/null +++ b/gfx/skia/skia/src/base/SkQuads.cpp @@ -0,0 +1,69 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/base/SkQuads.h" + +#include "include/private/base/SkFloatingPoint.h" + +#include + +// Solve 0 = M * x + B. If M is 0, there are no solutions, unless B is also 0, +// in which case there are infinite solutions, so we just return 1 of them. +static int solve_linear(const double M, const double B, double solution[2]) { + if (sk_double_nearly_zero(M)) { + solution[0] = 0; + if (sk_double_nearly_zero(B)) { + return 1; + } + return 0; + } + solution[0] = -B / M; + if (!std::isfinite(solution[0])) { + return 0; + } + return 1; +} + +// When the A coefficient of a quadratic is close to 0, there can be floating point error +// that arises from computing a very large root. In those cases, we would rather be +// precise about the one smaller root, so we have this arbitrary cutoff for when A is +// really small or small compared to B. +static bool close_to_linear(double A, double B) { + if (sk_double_nearly_zero(B)) { + return sk_double_nearly_zero(A); + } + // This is a different threshold (tighter) than the close_to_a_quadratic in SkCubics.cpp + // because the SkQuads::RootsReal gives better answers for longer as A/B -> 0. + return std::abs(A / B) < 1.0e-16; +} + +int SkQuads::RootsReal(const double A, const double B, const double C, double solution[2]) { + if (close_to_linear(A, B)) { + return solve_linear(B, C, solution); + } + // If A is zero (e.g. B was nan and thus close_to_linear was false), we will + // temporarily have infinities rolling about, but will catch that when checking + // p2 - q. + const double p = sk_ieee_double_divide(B, 2 * A); + const double q = sk_ieee_double_divide(C, A); + /* normal form: x^2 + px + q = 0 */ + const double p2 = p * p; + if (!std::isfinite(p2 - q) || + (!sk_double_nearly_zero(p2 - q) && p2 < q)) { + return 0; + } + double sqrt_D = 0; + if (p2 > q) { + sqrt_D = sqrt(p2 - q); + } + solution[0] = sqrt_D - p; + solution[1] = -sqrt_D - p; + if (sk_double_nearly_zero(sqrt_D) || + sk_doubles_nearly_equal_ulps(solution[0], solution[1])) { + return 1; + } + return 2; +} diff --git a/gfx/skia/skia/src/base/SkQuads.h b/gfx/skia/skia/src/base/SkQuads.h new file mode 100644 index 0000000000..645d43bcd4 --- /dev/null +++ b/gfx/skia/skia/src/base/SkQuads.h @@ -0,0 +1,36 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkQuads_DEFINED +#define SkQuads_DEFINED + +/** + * Utilities for dealing with quadratic formulas with one variable: + * f(t) = A*t^2 + B*t + C + */ +class SkQuads { +public: + /** + * Puts up to 2 real solutions to the equation + * A*t^2 + B*t + C = 0 + * in the provided array. + */ + static int RootsReal(double A, double B, double C, + double solution[2]); + + /** + * Evaluates the quadratic function with the 3 provided coefficients and the + * provided variable. + */ + static double EvalAt(double A, double B, double C, double t) { + return A * t * t + + B * t + + C; + } +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkRandom.h b/gfx/skia/skia/src/base/SkRandom.h new file mode 100644 index 0000000000..96b3824896 --- /dev/null +++ b/gfx/skia/skia/src/base/SkRandom.h @@ -0,0 +1,173 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRandom_DEFINED +#define SkRandom_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkFloatBits.h" + +#include + +typedef float SkScalar; + +/** \class SkRandom + + Utility class that implements pseudo random 32bit numbers using Marsaglia's + multiply-with-carry "mother of all" algorithm. Unlike rand(), this class holds + its own state, so that multiple instances can be used with no side-effects. + + Has a large period and all bits are well-randomized. + */ +class SkRandom { +public: + SkRandom() { init(0); } + SkRandom(uint32_t seed) { init(seed); } + SkRandom(const SkRandom& rand) : fK(rand.fK), fJ(rand.fJ) {} + + SkRandom& operator=(const SkRandom& rand) { + fK = rand.fK; + fJ = rand.fJ; + + return *this; + } + + /** Return the next pseudo random number as an unsigned 32bit value. + */ + uint32_t nextU() { + fK = kKMul*(fK & 0xffff) + (fK >> 16); + fJ = kJMul*(fJ & 0xffff) + (fJ >> 16); + return (((fK << 16) | (fK >> 16)) + fJ); + } + + /** Return the next pseudo random number as a signed 32bit value. + */ + int32_t nextS() { return (int32_t)this->nextU(); } + + /** + * Returns value [0...1) as an IEEE float + */ + float nextF() { + int floatint = 0x3f800000 | (int)(this->nextU() >> 9); + float f = SkBits2Float(floatint) - 1.0f; + return f; + } + + /** + * Returns value [min...max) as a float + */ + float nextRangeF(float min, float max) { + return min + this->nextF() * (max - min); + } + + /** Return the next pseudo random number, as an unsigned value of + at most bitCount bits. + @param bitCount The maximum number of bits to be returned + */ + uint32_t nextBits(unsigned bitCount) { + SkASSERT(bitCount > 0 && bitCount <= 32); + return this->nextU() >> (32 - bitCount); + } + + /** Return the next pseudo random unsigned number, mapped to lie within + [min, max] inclusive. + */ + uint32_t nextRangeU(uint32_t min, uint32_t max) { + SkASSERT(min <= max); + uint32_t range = max - min + 1; + if (0 == range) { + return this->nextU(); + } else { + return min + this->nextU() % range; + } + } + + /** Return the next pseudo random unsigned number, mapped to lie within + [0, count). + */ + uint32_t nextULessThan(uint32_t count) { + SkASSERT(count > 0); + return this->nextRangeU(0, count - 1); + } + + /** Return the next pseudo random number expressed as a SkScalar + in the range [0..SK_Scalar1). + */ + SkScalar nextUScalar1() { return SkFixedToScalar(this->nextUFixed1()); } + + /** Return the next pseudo random number expressed as a SkScalar + in the range [min..max). + */ + SkScalar nextRangeScalar(SkScalar min, SkScalar max) { + return this->nextUScalar1() * (max - min) + min; + } + + /** Return the next pseudo random number expressed as a SkScalar + in the range [-SK_Scalar1..SK_Scalar1). + */ + SkScalar nextSScalar1() { return SkFixedToScalar(this->nextSFixed1()); } + + /** Return the next pseudo random number as a bool. + */ + bool nextBool() { return this->nextU() >= 0x80000000; } + + /** A biased version of nextBool(). + */ + bool nextBiasedBool(SkScalar fractionTrue) { + SkASSERT(fractionTrue >= 0 && fractionTrue <= 1); + return this->nextUScalar1() <= fractionTrue; + } + + /** Reset the random object. + */ + void setSeed(uint32_t seed) { init(seed); } + +private: + // Initialize state variables with LCG. + // We must ensure that both J and K are non-zero, otherwise the + // multiply-with-carry step will forevermore return zero. + void init(uint32_t seed) { + fK = NextLCG(seed); + if (0 == fK) { + fK = NextLCG(fK); + } + fJ = NextLCG(fK); + if (0 == fJ) { + fJ = NextLCG(fJ); + } + SkASSERT(0 != fK && 0 != fJ); + } + static uint32_t NextLCG(uint32_t seed) { return kMul*seed + kAdd; } + + /** Return the next pseudo random number expressed as an unsigned SkFixed + in the range [0..SK_Fixed1). + */ + SkFixed nextUFixed1() { return this->nextU() >> 16; } + + /** Return the next pseudo random number expressed as a signed SkFixed + in the range [-SK_Fixed1..SK_Fixed1). + */ + SkFixed nextSFixed1() { return this->nextS() >> 15; } + + // See "Numerical Recipes in C", 1992 page 284 for these constants + // For the LCG that sets the initial state from a seed + enum { + kMul = 1664525, + kAdd = 1013904223 + }; + // Constants for the multiply-with-carry steps + enum { + kKMul = 30345, + kJMul = 18000, + }; + + uint32_t fK; + uint32_t fJ; +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkRectMemcpy.h b/gfx/skia/skia/src/base/SkRectMemcpy.h new file mode 100644 index 0000000000..07ba0f0c65 --- /dev/null +++ b/gfx/skia/skia/src/base/SkRectMemcpy.h @@ -0,0 +1,32 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRectMemcpy_DEFINED +#define SkRectMemcpy_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTemplates.h" + +#include + +static inline void SkRectMemcpy(void* dst, size_t dstRB, const void* src, size_t srcRB, + size_t trimRowBytes, int rowCount) { + SkASSERT(trimRowBytes <= dstRB); + SkASSERT(trimRowBytes <= srcRB); + if (trimRowBytes == dstRB && trimRowBytes == srcRB) { + memcpy(dst, src, trimRowBytes * rowCount); + return; + } + + for (int i = 0; i < rowCount; ++i) { + memcpy(dst, src, trimRowBytes); + dst = SkTAddOffset(dst, dstRB); + src = SkTAddOffset(src, srcRB); + } +} + +#endif diff --git a/gfx/skia/skia/src/base/SkSafeMath.cpp b/gfx/skia/skia/src/base/SkSafeMath.cpp new file mode 100644 index 0000000000..cb69125edb --- /dev/null +++ b/gfx/skia/skia/src/base/SkSafeMath.cpp @@ -0,0 +1,20 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkSafeMath.h" + +size_t SkSafeMath::Add(size_t x, size_t y) { + SkSafeMath tmp; + size_t sum = tmp.add(x, y); + return tmp.ok() ? sum : SIZE_MAX; +} + +size_t SkSafeMath::Mul(size_t x, size_t y) { + SkSafeMath tmp; + size_t prod = tmp.mul(x, y); + return tmp.ok() ? prod : SIZE_MAX; +} diff --git a/gfx/skia/skia/src/base/SkSafeMath.h b/gfx/skia/skia/src/base/SkSafeMath.h new file mode 100644 index 0000000000..8ca44749f4 --- /dev/null +++ b/gfx/skia/skia/src/base/SkSafeMath.h @@ -0,0 +1,113 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSafeMath_DEFINED +#define SkSafeMath_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" // IWYU pragma: keep +#include "include/private/base/SkTFitsIn.h" + +#include +#include +#include + +// SkSafeMath always check that a series of operations do not overflow. +// This must be correct for all platforms, because this is a check for safety at runtime. + +class SkSafeMath { +public: + SkSafeMath() = default; + + bool ok() const { return fOK; } + explicit operator bool() const { return fOK; } + + size_t mul(size_t x, size_t y) { + return sizeof(size_t) == sizeof(uint64_t) ? mul64(x, y) : mul32(x, y); + } + + size_t add(size_t x, size_t y) { + size_t result = x + y; + fOK &= result >= x; + return result; + } + + /** + * Return a + b, unless this result is an overflow/underflow. In those cases, fOK will + * be set to false, and it is undefined what this returns. + */ + int addInt(int a, int b) { + if (b < 0 && a < std::numeric_limits::min() - b) { + fOK = false; + return a; + } else if (b > 0 && a > std::numeric_limits::max() - b) { + fOK = false; + return a; + } + return a + b; + } + + size_t alignUp(size_t x, size_t alignment) { + SkASSERT(alignment && !(alignment & (alignment - 1))); + return add(x, alignment - 1) & ~(alignment - 1); + } + + template T castTo(size_t value) { + if (!SkTFitsIn(value)) { + fOK = false; + } + return static_cast(value); + } + + // These saturate to their results + static size_t Add(size_t x, size_t y); + static size_t Mul(size_t x, size_t y); + static size_t Align4(size_t x) { + SkSafeMath safe; + return safe.alignUp(x, 4); + } + +private: + uint32_t mul32(uint32_t x, uint32_t y) { + uint64_t bx = x; + uint64_t by = y; + uint64_t result = bx * by; + fOK &= result >> 32 == 0; + // Overflow information is capture in fOK. Return the result modulo 2^32. + return (uint32_t)result; + } + + uint64_t mul64(uint64_t x, uint64_t y) { + if (x <= std::numeric_limits::max() >> 32 + && y <= std::numeric_limits::max() >> 32) { + return x * y; + } else { + auto hi = [](uint64_t x) { return x >> 32; }; + auto lo = [](uint64_t x) { return x & 0xFFFFFFFF; }; + + uint64_t lx_ly = lo(x) * lo(y); + uint64_t hx_ly = hi(x) * lo(y); + uint64_t lx_hy = lo(x) * hi(y); + uint64_t hx_hy = hi(x) * hi(y); + uint64_t result = 0; + result = this->add(lx_ly, (hx_ly << 32)); + result = this->add(result, (lx_hy << 32)); + fOK &= (hx_hy + (hx_ly >> 32) + (lx_hy >> 32)) == 0; + + #if defined(SK_DEBUG) && defined(__clang__) && defined(__x86_64__) + auto double_check = (unsigned __int128)x * y; + SkASSERT(result == (double_check & 0xFFFFFFFFFFFFFFFF)); + SkASSERT(!fOK || (double_check >> 64 == 0)); + #endif + + return result; + } + } + bool fOK = true; +}; + +#endif//SkSafeMath_DEFINED diff --git a/gfx/skia/skia/src/base/SkScopeExit.h b/gfx/skia/skia/src/base/SkScopeExit.h new file mode 100644 index 0000000000..9c3581b464 --- /dev/null +++ b/gfx/skia/skia/src/base/SkScopeExit.h @@ -0,0 +1,59 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkScopeExit_DEFINED +#define SkScopeExit_DEFINED + +#include "include/private/base/SkMacros.h" + +#include +#include + +/** SkScopeExit calls a std:::function in its destructor. */ +class SkScopeExit { +public: + SkScopeExit() = default; + SkScopeExit(std::function f) : fFn(std::move(f)) {} + SkScopeExit(SkScopeExit&& that) : fFn(std::move(that.fFn)) {} + + ~SkScopeExit() { + if (fFn) { + fFn(); + } + } + + void clear() { fFn = {}; } + + SkScopeExit& operator=(SkScopeExit&& that) { + fFn = std::move(that.fFn); + return *this; + } + +private: + std::function fFn; + + SkScopeExit( const SkScopeExit& ) = delete; + SkScopeExit& operator=(const SkScopeExit& ) = delete; +}; + +/** + * SK_AT_SCOPE_EXIT(stmt) evaluates stmt when the current scope ends. + * + * E.g. + * { + * int x = 5; + * { + * SK_AT_SCOPE_EXIT(x--); + * SkASSERT(x == 5); + * } + * SkASSERT(x == 4); + * } + */ +#define SK_AT_SCOPE_EXIT(stmt) \ + SkScopeExit SK_MACRO_APPEND_LINE(at_scope_exit_)([&]() { stmt; }) + +#endif // SkScopeExit_DEFINED diff --git a/gfx/skia/skia/src/base/SkSemaphore.cpp b/gfx/skia/skia/src/base/SkSemaphore.cpp new file mode 100644 index 0000000000..cb85fa9745 --- /dev/null +++ b/gfx/skia/skia/src/base/SkSemaphore.cpp @@ -0,0 +1,83 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkSemaphore.h" + +#include "include/private/base/SkFeatures.h" // IWYU pragma: keep + +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + #include + + struct SkSemaphore::OSSemaphore { + dispatch_semaphore_t fSemaphore; + + OSSemaphore() { fSemaphore = dispatch_semaphore_create(0/*initial count*/); } + ~OSSemaphore() { dispatch_release(fSemaphore); } + + void signal(int n) { while (n --> 0) { dispatch_semaphore_signal(fSemaphore); } } + void wait() { dispatch_semaphore_wait(fSemaphore, DISPATCH_TIME_FOREVER); } + }; +#elif defined(SK_BUILD_FOR_WIN) +#include "src/base/SkLeanWindows.h" + + struct SkSemaphore::OSSemaphore { + HANDLE fSemaphore; + + OSSemaphore() { + fSemaphore = CreateSemaphore(nullptr /*security attributes, optional*/, + 0 /*initial count*/, + MAXLONG /*max count*/, + nullptr /*name, optional*/); + } + ~OSSemaphore() { CloseHandle(fSemaphore); } + + void signal(int n) { + ReleaseSemaphore(fSemaphore, n, nullptr/*returns previous count, optional*/); + } + void wait() { WaitForSingleObject(fSemaphore, INFINITE/*timeout in ms*/); } + }; +#else + // It's important we test for Mach before this. This code will compile but not work there. + #include + #include + struct SkSemaphore::OSSemaphore { + sem_t fSemaphore; + + OSSemaphore() { sem_init(&fSemaphore, 0/*cross process?*/, 0/*initial count*/); } + ~OSSemaphore() { sem_destroy(&fSemaphore); } + + void signal(int n) { while (n --> 0) { sem_post(&fSemaphore); } } + void wait() { + // Try until we're not interrupted. + while(sem_wait(&fSemaphore) == -1 && errno == EINTR); + } + }; +#endif + +/////////////////////////////////////////////////////////////////////////////// + +SkSemaphore::~SkSemaphore() { + delete fOSSemaphore; +} + +void SkSemaphore::osSignal(int n) { + fOSSemaphoreOnce([this] { fOSSemaphore = new OSSemaphore; }); + fOSSemaphore->signal(n); +} + +void SkSemaphore::osWait() { + fOSSemaphoreOnce([this] { fOSSemaphore = new OSSemaphore; }); + fOSSemaphore->wait(); +} + +bool SkSemaphore::try_wait() { + int count = fCount.load(std::memory_order_relaxed); + if (count > 0) { + return fCount.compare_exchange_weak(count, count-1, std::memory_order_acquire); + } + return false; +} diff --git a/gfx/skia/skia/src/base/SkStringView.h b/gfx/skia/skia/src/base/SkStringView.h new file mode 100644 index 0000000000..f8f83ae77e --- /dev/null +++ b/gfx/skia/skia/src/base/SkStringView.h @@ -0,0 +1,51 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStringView_DEFINED +#define SkStringView_DEFINED + +#include +#include + +namespace skstd { + +// C++20 additions +inline constexpr bool starts_with(std::string_view str, std::string_view prefix) { + if (prefix.length() > str.length()) { + return false; + } + return prefix.length() == 0 || !memcmp(str.data(), prefix.data(), prefix.length()); +} + +inline constexpr bool starts_with(std::string_view str, std::string_view::value_type c) { + return !str.empty() && str.front() == c; +} + +inline constexpr bool ends_with(std::string_view str, std::string_view suffix) { + if (suffix.length() > str.length()) { + return false; + } + return suffix.length() == 0 || !memcmp(str.data() + str.length() - suffix.length(), + suffix.data(), suffix.length()); +} + +inline constexpr bool ends_with(std::string_view str, std::string_view::value_type c) { + return !str.empty() && str.back() == c; +} + +// C++23 additions +inline constexpr bool contains(std::string_view str, std::string_view needle) { + return str.find(needle) != std::string_view::npos; +} + +inline constexpr bool contains(std::string_view str, std::string_view::value_type c) { + return str.find(c) != std::string_view::npos; +} + +} // namespace skstd + +#endif diff --git a/gfx/skia/skia/src/base/SkTBlockList.h b/gfx/skia/skia/src/base/SkTBlockList.h new file mode 100644 index 0000000000..88e91a92bb --- /dev/null +++ b/gfx/skia/skia/src/base/SkTBlockList.h @@ -0,0 +1,448 @@ +/* + * Copyright 2010 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTBlockList_DEFINED +#define SkTBlockList_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkBlockAllocator.h" + +#include +#include +#include +#include + +// Forward declarations for the iterators used by SkTBlockList +using IndexFn = int (*)(const SkBlockAllocator::Block*); +using NextFn = int (*)(const SkBlockAllocator::Block*, int); +template using ItemFn = T (*)(B*, int); +template ::type> Resolve> +class BlockIndexIterator; + +/** + * SkTBlockList manages dynamic storage for instances of T, reserving fixed blocks such that + * allocation is amortized across every N instances. In this way it is a hybrid of an array-based + * vector and a linked-list. T can be any type and non-trivial destructors are automatically + * invoked when the SkTBlockList is destructed. The addresses of instances are guaranteed + * not to move except when a list is concatenated to another. + * + * The collection supports storing a templated number of elements inline before heap-allocated + * blocks are made to hold additional instances. By default, the heap blocks are sized to hold the + * same number of items as the inline block. A common pattern is to have the inline size hold only + * a small number of items for the common case and then allocate larger blocks when needed. + * + * If the size of a collection is N, and its block size is B, the complexity of the common + * operations are: + * - push_back()/emplace_back(): O(1), with malloc O(B) + * - pop_back(): O(1), with free O(B) + * - front()/back(): O(1) + * - reset(): O(N) for non-trivial types, O(N/B) for trivial types + * - concat(): O(B) + * - random access: O(N/B) + * - iteration: O(1) at each step + * + * These characteristics make it well suited for allocating items in a LIFO ordering, or otherwise + * acting as a stack, or simply using it as a typed allocator. + */ +template +class SkTBlockList { +public: + /** + * Create an allocator that defaults to using StartingItems as heap increment. + */ + SkTBlockList() : SkTBlockList(StartingItems) {} + + /** + * Create an allocator + * + * @param itemsPerBlock the number of items to allocate at once + */ + explicit SkTBlockList(int itemsPerBlock, + SkBlockAllocator::GrowthPolicy policy = + SkBlockAllocator::GrowthPolicy::kFixed) + : fAllocator(policy, + SkBlockAllocator::BlockOverhead() + sizeof(T)*itemsPerBlock) {} + + ~SkTBlockList() { this->reset(); } + + /** + * Adds an item and returns it. + * + * @return the added item. + */ + T& push_back() { + return *new (this->pushItem()) T; + } + T& push_back(const T& t) { + return *new (this->pushItem()) T(t); + } + T& push_back(T&& t) { + return *new (this->pushItem()) T(std::move(t)); + } + + template + T& emplace_back(Args&&... args) { + return *new (this->pushItem()) T(std::forward(args)...); + } + + /** + * Move all items from 'other' to the end of this collection. When this returns, 'other' will + * be empty. Items in 'other' may be moved as part of compacting the pre-allocated start of + * 'other' into this list (using T's move constructor or memcpy if T is trivially copyable), but + * this is O(StartingItems) and not O(N). All other items are concatenated in O(1). + */ + template + void concat(SkTBlockList&& other); + + /** + * Allocate, if needed, space to hold N more Ts before another malloc will occur. + */ + void reserve(int n) { + int avail = fAllocator->currentBlock()->template avail() / sizeof(T); + if (n > avail) { + int reserved = n - avail; + // Don't consider existing bytes since we've already determined how to split the N items + fAllocator->template reserve( + reserved * sizeof(T), SkBlockAllocator::kIgnoreExistingBytes_Flag); + } + } + + /** + * Remove the last item, only call if count() != 0 + */ + void pop_back() { + SkASSERT(this->count() > 0); + + SkBlockAllocator::Block* block = fAllocator->currentBlock(); + + // Run dtor for the popped item + int releaseIndex = Last(block); + GetItem(block, releaseIndex).~T(); + + if (releaseIndex == First(block)) { + fAllocator->releaseBlock(block); + } else { + // Since this always follows LIFO, the block should always be able to release the memory + SkAssertResult(block->release(releaseIndex, releaseIndex + sizeof(T))); + block->setMetadata(Decrement(block, releaseIndex)); + } + + fAllocator->setMetadata(fAllocator->metadata() - 1); + } + + /** + * Removes all added items. + */ + void reset() { + // Invoke destructors in reverse order if not trivially destructible + if constexpr (!std::is_trivially_destructible::value) { + for (T& t : this->ritems()) { + t.~T(); + } + } + + fAllocator->reset(); + } + + /** + * Returns the item count. + */ + int count() const { +#ifdef SK_DEBUG + // Confirm total count matches sum of block counts + int count = 0; + for (const auto* b :fAllocator->blocks()) { + if (b->metadata() == 0) { + continue; // skip empty + } + count += (sizeof(T) + Last(b) - First(b)) / sizeof(T); + } + SkASSERT(count == fAllocator->metadata()); +#endif + return fAllocator->metadata(); + } + + /** + * Is the count 0? + */ + bool empty() const { return this->count() == 0; } + + /** + * Access first item, only call if count() != 0 + */ + T& front() { + // This assumes that the head block actually have room to store the first item. + static_assert(StartingItems >= 1); + SkASSERT(this->count() > 0 && fAllocator->headBlock()->metadata() > 0); + return GetItem(fAllocator->headBlock(), First(fAllocator->headBlock())); + } + const T& front() const { + SkASSERT(this->count() > 0 && fAllocator->headBlock()->metadata() > 0); + return GetItem(fAllocator->headBlock(), First(fAllocator->headBlock())); + } + + /** + * Access last item, only call if count() != 0 + */ + T& back() { + SkASSERT(this->count() > 0 && fAllocator->currentBlock()->metadata() > 0); + return GetItem(fAllocator->currentBlock(), Last(fAllocator->currentBlock())); + } + const T& back() const { + SkASSERT(this->count() > 0 && fAllocator->currentBlock()->metadata() > 0); + return GetItem(fAllocator->currentBlock(), Last(fAllocator->currentBlock())); + } + + /** + * Access item by index. Not an operator[] since it should not be considered constant time. + * Use for-range loops by calling items() or ritems() instead to access all added items in order + */ + T& item(int i) { + SkASSERT(i >= 0 && i < this->count()); + + // Iterate over blocks until we find the one that contains i. + for (auto* b : fAllocator->blocks()) { + if (b->metadata() == 0) { + continue; // skip empty + } + + int start = First(b); + int end = Last(b) + sizeof(T); // exclusive + int index = start + i * sizeof(T); + if (index < end) { + return GetItem(b, index); + } else { + i -= (end - start) / sizeof(T); + } + } + SkUNREACHABLE; + } + const T& item(int i) const { + return const_cast(this)->item(i); + } + +private: + // Let other SkTBlockLists have access (only ever used when T and S are the same but you + // cannot have partial specializations declared as a friend...) + template friend class SkTBlockList; + friend class TBlockListTestAccess; // for fAllocator + + inline static constexpr size_t StartingSize = + SkBlockAllocator::Overhead() + StartingItems * sizeof(T); + + static T& GetItem(SkBlockAllocator::Block* block, int index) { + return *static_cast(block->ptr(index)); + } + static const T& GetItem(const SkBlockAllocator::Block* block, int index) { + return *static_cast(block->ptr(index)); + } + static int First(const SkBlockAllocator::Block* b) { + return b->firstAlignedOffset(); + } + static int Last(const SkBlockAllocator::Block* b) { + return b->metadata(); + } + static int Increment(const SkBlockAllocator::Block* b, int index) { + return index + sizeof(T); + } + static int Decrement(const SkBlockAllocator::Block* b, int index) { + return index - sizeof(T); + } + + void* pushItem() { + // 'template' required because fAllocator is a template, calling a template member + auto br = fAllocator->template allocate(sizeof(T)); + SkASSERT(br.fStart == br.fAlignedOffset || + br.fAlignedOffset == First(fAllocator->currentBlock())); + br.fBlock->setMetadata(br.fAlignedOffset); + fAllocator->setMetadata(fAllocator->metadata() + 1); + return br.fBlock->ptr(br.fAlignedOffset); + } + + // N represents the number of items, whereas SkSBlockAllocator takes total bytes, so must + // account for the block allocator's size too. + // + // This class uses the SkBlockAllocator's metadata to track total count of items, and per-block + // metadata to track the index of the last allocated item within each block. + SkSBlockAllocator fAllocator; + +public: + using Iter = BlockIndexIterator; + using CIter = BlockIndexIterator; + using RIter = BlockIndexIterator; + using CRIter = BlockIndexIterator; + + /** + * Iterate over all items in allocation order (oldest to newest) using a for-range loop: + * + * for (auto&& T : this->items()) {} + */ + Iter items() { return Iter(fAllocator.allocator()); } + CIter items() const { return CIter(fAllocator.allocator()); } + + // Iterate from newest to oldest using a for-range loop. + RIter ritems() { return RIter(fAllocator.allocator()); } + CRIter ritems() const { return CRIter(fAllocator.allocator()); } +}; + +template +template +void SkTBlockList::concat(SkTBlockList&& other) { + // Optimize the common case where the list to append only has a single item + if (other.empty()) { + return; + } else if (other.count() == 1) { + this->push_back(other.back()); + other.pop_back(); + return; + } + + // Manually move all items in other's head block into this list; all heap blocks from 'other' + // will be appended to the block linked list (no per-item moves needed then). + int headItemCount = 0; + SkBlockAllocator::Block* headBlock = other.fAllocator->headBlock(); + SkDEBUGCODE(int oldCount = this->count();) + if (headBlock->metadata() > 0) { + int headStart = First(headBlock); + int headEnd = Last(headBlock) + sizeof(T); // exclusive + headItemCount = (headEnd - headStart) / sizeof(T); + int avail = fAllocator->currentBlock()->template avail() / sizeof(T); + if (headItemCount > avail) { + // Make sure there is extra room for the items beyond what's already avail. Use the + // kIgnoreGrowthPolicy_Flag to make this reservation as tight as possible since + // 'other's heap blocks will be appended after it and any extra space is wasted. + fAllocator->template reserve((headItemCount - avail) * sizeof(T), + SkBlockAllocator::kIgnoreExistingBytes_Flag | + SkBlockAllocator::kIgnoreGrowthPolicy_Flag); + } + + if constexpr (std::is_trivially_copy_constructible::value) { + // memcpy all items at once (or twice between current and reserved space). + SkASSERT(std::is_trivially_destructible::value); + auto copy = [](SkBlockAllocator::Block* src, int start, SkBlockAllocator* dst, int n) { + auto target = dst->template allocate(n * sizeof(T)); + memcpy(target.fBlock->ptr(target.fAlignedOffset), src->ptr(start), n * sizeof(T)); + target.fBlock->setMetadata(target.fAlignedOffset + (n - 1) * sizeof(T)); + }; + + if (avail > 0) { + // Copy 0 to avail items into existing tail block + copy(headBlock, headStart, fAllocator.allocator(), std::min(headItemCount, avail)); + } + if (headItemCount > avail) { + // Copy (head count - avail) into the extra reserved space + copy(headBlock, headStart + avail * sizeof(T), + fAllocator.allocator(), headItemCount - avail); + } + fAllocator->setMetadata(fAllocator->metadata() + headItemCount); + } else { + // Move every item over one at a time + for (int i = headStart; i < headEnd; i += sizeof(T)) { + T& toMove = GetItem(headBlock, i); + this->push_back(std::move(toMove)); + // Anything of interest should have been moved, but run this since T isn't + // a trusted type. + toMove.~T(); // NOLINT(bugprone-use-after-move): calling dtor always allowed + } + } + + other.fAllocator->releaseBlock(headBlock); + } + + // other's head block must have been fully copied since it cannot be stolen + SkASSERT(other.fAllocator->headBlock()->metadata() == 0 && + fAllocator->metadata() == oldCount + headItemCount); + fAllocator->stealHeapBlocks(other.fAllocator.allocator()); + fAllocator->setMetadata(fAllocator->metadata() + + (other.fAllocator->metadata() - headItemCount)); + other.fAllocator->setMetadata(0); +} + +/** + * BlockIndexIterator provides a reusable iterator template for collections built on top of a + * SkBlockAllocator, where each item is of the same type, and the index to an item can be iterated + * over in a known manner. It supports const and non-const, and forward and reverse, assuming it's + * provided with proper functions for starting, ending, and advancing. + */ +template ::type> Resolve> +class BlockIndexIterator { + using BlockIter = typename SkBlockAllocator::BlockIter; +public: + BlockIndexIterator(BlockIter iter) : fBlockIter(iter) {} + + class Item { + public: + bool operator!=(const Item& other) const { + return other.fBlock != fBlock || (SkToBool(*fBlock) && other.fIndex != fIndex); + } + + T operator*() const { + SkASSERT(*fBlock); + return Resolve(*fBlock, fIndex); + } + + Item& operator++() { + const auto* block = *fBlock; + SkASSERT(block && block->metadata() > 0); + SkASSERT((Forward && Next(block, fIndex) > fIndex) || + (!Forward && Next(block, fIndex) < fIndex)); + fIndex = Next(block, fIndex); + if ((Forward && fIndex > fEndIndex) || (!Forward && fIndex < fEndIndex)) { + ++fBlock; + this->setIndices(); + } + return *this; + } + + private: + friend BlockIndexIterator; + using BlockItem = typename BlockIter::Item; + + Item(BlockItem block) : fBlock(block) { + this->setIndices(); + } + + void setIndices() { + // Skip empty blocks + while(*fBlock && (*fBlock)->metadata() == 0) { + ++fBlock; + } + if (*fBlock) { + fIndex = Start(*fBlock); + fEndIndex = End(*fBlock); + } else { + fIndex = 0; + fEndIndex = 0; + } + + SkASSERT((Forward && fIndex <= fEndIndex) || (!Forward && fIndex >= fEndIndex)); + } + + BlockItem fBlock; + int fIndex; + int fEndIndex; + }; + + Item begin() const { return Item(fBlockIter.begin()); } + Item end() const { return Item(fBlockIter.end()); } + +private: + BlockIter fBlockIter; +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkTDArray.cpp b/gfx/skia/skia/src/base/SkTDArray.cpp new file mode 100644 index 0000000000..2cf7780f95 --- /dev/null +++ b/gfx/skia/skia/src/base/SkTDArray.cpp @@ -0,0 +1,240 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkTDArray.h" + +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTo.h" + +#include +#include +#include +#include +#include +#include + +SkTDStorage::SkTDStorage(int sizeOfT) : fSizeOfT{sizeOfT} {} + +SkTDStorage::SkTDStorage(const void* src, int size, int sizeOfT) + : fSizeOfT{sizeOfT} + , fCapacity{size} + , fSize{size} { + if (size > 0) { + SkASSERT(src != nullptr); + size_t storageSize = this->bytes(size); + fStorage = static_cast(sk_malloc_throw(storageSize)); + memcpy(fStorage, src, storageSize); + } +} + +SkTDStorage::SkTDStorage(const SkTDStorage& that) + : SkTDStorage{that.fStorage, that.fSize, that.fSizeOfT} {} + +SkTDStorage& SkTDStorage::operator=(const SkTDStorage& that) { + if (this != &that) { + if (that.fSize <= fCapacity) { + fSize = that.fSize; + if (fSize > 0) { + memcpy(fStorage, that.data(), that.size_bytes()); + } + } else { + *this = SkTDStorage{that.data(), that.size(), that.fSizeOfT}; + } + } + return *this; +} + +SkTDStorage::SkTDStorage(SkTDStorage&& that) + : fSizeOfT{that.fSizeOfT} + , fStorage(std::exchange(that.fStorage, nullptr)) + , fCapacity{that.fCapacity} + , fSize{that.fSize} {} + +SkTDStorage& SkTDStorage::operator=(SkTDStorage&& that) { + if (this != &that) { + this->~SkTDStorage(); + new (this) SkTDStorage{std::move(that)}; + } + return *this; +} + +SkTDStorage::~SkTDStorage() { + sk_free(fStorage); +} + +void SkTDStorage::reset() { + const int sizeOfT = fSizeOfT; + this->~SkTDStorage(); + new (this) SkTDStorage{sizeOfT}; +} + +void SkTDStorage::swap(SkTDStorage& that) { + SkASSERT(fSizeOfT == that.fSizeOfT); + using std::swap; + swap(fStorage, that.fStorage); + swap(fCapacity, that.fCapacity); + swap(fSize, that.fSize); +} + +void SkTDStorage::resize(int newSize) { + SkASSERT(newSize >= 0); + if (newSize > fCapacity) { + this->reserve(newSize); + } + fSize = newSize; +} + +void SkTDStorage::reserve(int newCapacity) { + SkASSERT(newCapacity >= 0); + if (newCapacity > fCapacity) { + // Establish the maximum number of elements that includes a valid count for end. In the + // largest case end() = &fArray[INT_MAX] which is 1 after the last indexable element. + static constexpr int kMaxCount = INT_MAX; + + // Assume that the array will max out. + int expandedReserve = kMaxCount; + if (kMaxCount - newCapacity > 4) { + // Add 1/4 more than we need. Add 4 to ensure this grows by at least 1. Pin to + // kMaxCount if no room for 1/4 growth. + int growth = 4 + ((newCapacity + 4) >> 2); + // Read this line as: if (count + growth < kMaxCount) { ... } + // It's rewritten to avoid signed integer overflow. + if (kMaxCount - newCapacity > growth) { + expandedReserve = newCapacity + growth; + } + } + + + // With a T size of 1, the above allocator produces the progression of 7, 15, ... Since, + // the sizeof max_align_t is often 16, there is no reason to allocate anything less than + // 16 bytes. This eliminates a realloc when pushing back bytes to an SkTDArray. + if (fSizeOfT == 1) { + // Round up to the multiple of 16. + expandedReserve = (expandedReserve + 15) & ~15; + } + + fCapacity = expandedReserve; + size_t newStorageSize = this->bytes(fCapacity); + fStorage = static_cast(sk_realloc_throw(fStorage, newStorageSize)); + } +} + +void SkTDStorage::shrink_to_fit() { + if (fCapacity != fSize) { + fCapacity = fSize; + // Because calling realloc with size of 0 is implementation defined, force to a good state + // by freeing fStorage. + if (fCapacity > 0) { + fStorage = static_cast(sk_realloc_throw(fStorage, this->bytes(fCapacity))); + } else { + sk_free(fStorage); + fStorage = nullptr; + } + } +} + +void SkTDStorage::erase(int index, int count) { + SkASSERT(count >= 0); + SkASSERT(fSize >= count); + SkASSERT(0 <= index && index <= fSize); + + if (count > 0) { + // Check that the resulting size fits in an int. This will abort if not. + const int newCount = this->calculateSizeOrDie(-count); + this->moveTail(index, index + count, fSize); + this->resize(newCount); + } +} + +void SkTDStorage::removeShuffle(int index) { + SkASSERT(fSize > 0); + SkASSERT(0 <= index && index < fSize); + // Check that the new count is valid. + const int newCount = this->calculateSizeOrDie(-1); + this->moveTail(index, fSize - 1, fSize); + this->resize(newCount); +} + +void* SkTDStorage::prepend() { + return this->insert(/*index=*/0); +} + +void SkTDStorage::append() { + if (fSize < fCapacity) { + fSize++; + } else { + this->insert(fSize); + } +} + +void SkTDStorage::append(int count) { + SkASSERT(count >= 0); + // Read as: if (fSize + count <= fCapacity) {...}. This is a UB safe way to avoid the add. + if (fCapacity - fSize >= count) { + fSize += count; + } else { + this->insert(fSize, count, nullptr); + } +} + +void* SkTDStorage::append(const void* src, int count) { + return this->insert(fSize, count, src); +} + +void* SkTDStorage::insert(int index) { + return this->insert(index, /*count=*/1, nullptr); +} + +void* SkTDStorage::insert(int index, int count, const void* src) { + SkASSERT(0 <= index && index <= fSize); + SkASSERT(count >= 0); + + if (count > 0) { + const int oldCount = fSize; + const int newCount = this->calculateSizeOrDie(count); + this->resize(newCount); + this->moveTail(index + count, index, oldCount); + + if (src != nullptr) { + this->copySrc(index, src, count); + } + } + + return this->address(index); +} + +bool operator==(const SkTDStorage& a, const SkTDStorage& b) { + return a.size() == b.size() && + (a.size() == 0 || !memcmp(a.data(), b.data(), a.bytes(a.size()))); +} + +int SkTDStorage::calculateSizeOrDie(int delta) { + // Check that count will not go negative. + SkASSERT_RELEASE(-fSize <= delta); + + // We take care to avoid overflow here. + // Because count and delta are both signed 32-bit ints, the sum of count and delta is at + // most 4294967294, which fits fine in uint32_t. Proof follows in assert. + static_assert(UINT32_MAX >= (uint32_t)INT_MAX + (uint32_t)INT_MAX); + uint32_t testCount = (uint32_t)fSize + (uint32_t)delta; + SkASSERT_RELEASE(SkTFitsIn(testCount)); + return SkToInt(testCount); +} + +void SkTDStorage::moveTail(int to, int tailStart, int tailEnd) { + SkASSERT(0 <= to && to <= fSize); + SkASSERT(0 <= tailStart && tailStart <= tailEnd && tailEnd <= fSize); + if (to != tailStart && tailStart != tailEnd) { + this->copySrc(to, this->address(tailStart), tailEnd - tailStart); + } +} + +void SkTDStorage::copySrc(int dstIndex, const void* src, int count) { + SkASSERT(count > 0); + memmove(this->address(dstIndex), src, this->bytes(count)); +} diff --git a/gfx/skia/skia/src/base/SkTDPQueue.h b/gfx/skia/skia/src/base/SkTDPQueue.h new file mode 100644 index 0000000000..3a897130f2 --- /dev/null +++ b/gfx/skia/skia/src/base/SkTDPQueue.h @@ -0,0 +1,222 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTDPQueue_DEFINED +#define SkTDPQueue_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkTSort.h" + +#include + +/** + * This class implements a priority queue. T is the type of the elements in the queue. LESS is a + * function that compares two Ts and returns true if the first is higher priority than the second. + * + * Optionally objects may know their index into the priority queue. The queue will update the index + * as the objects move through the queue. This is enabled by using a non-nullptr function for INDEX. + * When an INDEX function is provided random deletes from the queue are allowed using remove(). + * Additionally, the * priority is allowed to change as long as priorityDidChange() is called + * afterwards. In debug builds the index will be set to -1 before an element is removed from the + * queue. + */ +template +class SkTDPQueue { +public: + SkTDPQueue() {} + SkTDPQueue(int reserve) { fArray.reserve(reserve); } + + SkTDPQueue(SkTDPQueue&&) = default; + SkTDPQueue& operator =(SkTDPQueue&&) = default; + + SkTDPQueue(const SkTDPQueue&) = delete; + SkTDPQueue& operator=(const SkTDPQueue&) = delete; + + /** Number of items in the queue. */ + int count() const { return fArray.size(); } + + /** Gets the next item in the queue without popping it. */ + const T& peek() const { return fArray[0]; } + T& peek() { return fArray[0]; } + + /** Removes the next item. */ + void pop() { + this->validate(); + SkDEBUGCODE(if (SkToBool(INDEX)) { *INDEX(fArray[0]) = -1; }) + if (1 == fArray.size()) { + fArray.pop_back(); + return; + } + + fArray[0] = fArray[fArray.size() - 1]; + this->setIndex(0); + fArray.pop_back(); + this->percolateDownIfNecessary(0); + + this->validate(); + } + + /** Inserts a new item in the queue based on its priority. */ + void insert(T entry) { + this->validate(); + int index = fArray.size(); + *fArray.append() = entry; + this->setIndex(fArray.size() - 1); + this->percolateUpIfNecessary(index); + this->validate(); + } + + /** Random access removal. This requires that the INDEX function is non-nullptr. */ + void remove(T entry) { + SkASSERT(nullptr != INDEX); + int index = *INDEX(entry); + SkASSERT(index >= 0 && index < fArray.size()); + this->validate(); + SkDEBUGCODE(*INDEX(fArray[index]) = -1;) + if (index == fArray.size() - 1) { + fArray.pop_back(); + return; + } + fArray[index] = fArray[fArray.size() - 1]; + fArray.pop_back(); + this->setIndex(index); + this->percolateUpOrDown(index); + this->validate(); + } + + /** Notification that the priority of an entry has changed. This must be called after an + item's priority is changed to maintain correct ordering. Changing the priority is only + allowed if an INDEX function is provided. */ + void priorityDidChange(T entry) { + SkASSERT(nullptr != INDEX); + int index = *INDEX(entry); + SkASSERT(index >= 0 && index < fArray.size()); + this->validate(index); + this->percolateUpOrDown(index); + this->validate(); + } + + /** Gets the item at index i in the priority queue (for i < this->count()). at(0) is equivalent + to peek(). Otherwise, there is no guarantee about ordering of elements in the queue. */ + T at(int i) const { return fArray[i]; } + + /** Sorts the queue into priority order. The queue is only guarenteed to remain in sorted order + * until any other operation, other than at(), is performed. + */ + void sort() { + if (fArray.size() > 1) { + SkTQSort(fArray.begin(), fArray.end(), LESS); + for (int i = 0; i < fArray.size(); i++) { + this->setIndex(i); + } + this->validate(); + } + } + +private: + static int LeftOf(int x) { SkASSERT(x >= 0); return 2 * x + 1; } + static int ParentOf(int x) { SkASSERT(x > 0); return (x - 1) >> 1; } + + void percolateUpOrDown(int index) { + SkASSERT(index >= 0); + if (!percolateUpIfNecessary(index)) { + this->validate(index); + this->percolateDownIfNecessary(index); + } + } + + bool percolateUpIfNecessary(int index) { + SkASSERT(index >= 0); + bool percolated = false; + do { + if (0 == index) { + this->setIndex(index); + return percolated; + } + int p = ParentOf(index); + if (LESS(fArray[index], fArray[p])) { + using std::swap; + swap(fArray[index], fArray[p]); + this->setIndex(index); + index = p; + percolated = true; + } else { + this->setIndex(index); + return percolated; + } + this->validate(index); + } while (true); + } + + void percolateDownIfNecessary(int index) { + SkASSERT(index >= 0); + do { + int child = LeftOf(index); + + if (child >= fArray.size()) { + // We're a leaf. + this->setIndex(index); + return; + } + + if (child + 1 >= fArray.size()) { + // We only have a left child. + if (LESS(fArray[child], fArray[index])) { + using std::swap; + swap(fArray[child], fArray[index]); + this->setIndex(child); + this->setIndex(index); + return; + } + } else if (LESS(fArray[child + 1], fArray[child])) { + // The right child is the one we should swap with, if we swap. + child++; + } + + // Check if we need to swap. + if (LESS(fArray[child], fArray[index])) { + using std::swap; + swap(fArray[child], fArray[index]); + this->setIndex(index); + index = child; + } else { + // We're less than both our children. + this->setIndex(index); + return; + } + this->validate(index); + } while (true); + } + + void setIndex(int index) { + SkASSERT(index < fArray.size()); + if (SkToBool(INDEX)) { + *INDEX(fArray[index]) = index; + } + } + + void validate(int excludedIndex = -1) const { +#ifdef SK_DEBUG + for (int i = 1; i < fArray.size(); ++i) { + int p = ParentOf(i); + if (excludedIndex != p && excludedIndex != i) { + SkASSERT(!(LESS(fArray[i], fArray[p]))); + SkASSERT(!SkToBool(INDEX) || *INDEX(fArray[i]) == i); + } + } +#endif + } + + SkTDArray fArray; +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkTInternalLList.h b/gfx/skia/skia/src/base/SkTInternalLList.h new file mode 100644 index 0000000000..5b655a35eb --- /dev/null +++ b/gfx/skia/skia/src/base/SkTInternalLList.h @@ -0,0 +1,304 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTInternalLList_DEFINED +#define SkTInternalLList_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTo.h" + +/** + * This macro creates the member variables required by the SkTInternalLList class. It should be + * placed in the private section of any class that will be stored in a double linked list. + */ +#define SK_DECLARE_INTERNAL_LLIST_INTERFACE(ClassName) \ + friend class SkTInternalLList; \ + /* back pointer to the owning list - for debugging */ \ + SkDEBUGCODE(SkTInternalLList* fList = nullptr;) \ + ClassName* fPrev = nullptr; \ + ClassName* fNext = nullptr + +/** + * This class implements a templated internal doubly linked list data structure. + */ +template class SkTInternalLList { +public: + SkTInternalLList() {} + + void reset() { + fHead = nullptr; + fTail = nullptr; + } + + void remove(T* entry) { + SkASSERT(fHead && fTail); + SkASSERT(this->isInList(entry)); + + T* prev = entry->fPrev; + T* next = entry->fNext; + + if (prev) { + prev->fNext = next; + } else { + fHead = next; + } + if (next) { + next->fPrev = prev; + } else { + fTail = prev; + } + + entry->fPrev = nullptr; + entry->fNext = nullptr; + +#ifdef SK_DEBUG + entry->fList = nullptr; +#endif + } + + void addToHead(T* entry) { + SkASSERT(nullptr == entry->fPrev && nullptr == entry->fNext); + SkASSERT(nullptr == entry->fList); + + entry->fPrev = nullptr; + entry->fNext = fHead; + if (fHead) { + fHead->fPrev = entry; + } + fHead = entry; + if (nullptr == fTail) { + fTail = entry; + } + +#ifdef SK_DEBUG + entry->fList = this; +#endif + } + + void addToTail(T* entry) { + SkASSERT(nullptr == entry->fPrev && nullptr == entry->fNext); + SkASSERT(nullptr == entry->fList); + + entry->fPrev = fTail; + entry->fNext = nullptr; + if (fTail) { + fTail->fNext = entry; + } + fTail = entry; + if (nullptr == fHead) { + fHead = entry; + } + +#ifdef SK_DEBUG + entry->fList = this; +#endif + } + + /** + * Inserts a new list entry before an existing list entry. The new entry must not already be + * a member of this or any other list. If existingEntry is NULL then the new entry is added + * at the tail. + */ + void addBefore(T* newEntry, T* existingEntry) { + SkASSERT(newEntry); + + if (nullptr == existingEntry) { + this->addToTail(newEntry); + return; + } + + SkASSERT(this->isInList(existingEntry)); + newEntry->fNext = existingEntry; + T* prev = existingEntry->fPrev; + existingEntry->fPrev = newEntry; + newEntry->fPrev = prev; + if (nullptr == prev) { + SkASSERT(fHead == existingEntry); + fHead = newEntry; + } else { + prev->fNext = newEntry; + } +#ifdef SK_DEBUG + newEntry->fList = this; +#endif + } + + /** + * Inserts a new list entry after an existing list entry. The new entry must not already be + * a member of this or any other list. If existingEntry is NULL then the new entry is added + * at the head. + */ + void addAfter(T* newEntry, T* existingEntry) { + SkASSERT(newEntry); + + if (nullptr == existingEntry) { + this->addToHead(newEntry); + return; + } + + SkASSERT(this->isInList(existingEntry)); + newEntry->fPrev = existingEntry; + T* next = existingEntry->fNext; + existingEntry->fNext = newEntry; + newEntry->fNext = next; + if (nullptr == next) { + SkASSERT(fTail == existingEntry); + fTail = newEntry; + } else { + next->fPrev = newEntry; + } +#ifdef SK_DEBUG + newEntry->fList = this; +#endif + } + + void concat(SkTInternalLList&& list) { + if (list.isEmpty()) { + return; + } + + list.fHead->fPrev = fTail; + if (!fHead) { + SkASSERT(!list.fHead->fPrev); + fHead = list.fHead; + } else { + SkASSERT(fTail); + fTail->fNext = list.fHead; + } + fTail = list.fTail; + +#ifdef SK_DEBUG + for (T* node = list.fHead; node; node = node->fNext) { + SkASSERT(node->fList == &list); + node->fList = this; + } +#endif + + list.fHead = list.fTail = nullptr; + } + + bool isEmpty() const { + SkASSERT(SkToBool(fHead) == SkToBool(fTail)); + return !fHead; + } + + T* head() const { return fHead; } + T* tail() const { return fTail; } + + class Iter { + public: + enum IterStart { + kHead_IterStart, + kTail_IterStart + }; + + Iter() : fCurr(nullptr) {} + Iter(const Iter& iter) : fCurr(iter.fCurr) {} + Iter& operator= (const Iter& iter) { fCurr = iter.fCurr; return *this; } + + T* init(const SkTInternalLList& list, IterStart startLoc) { + if (kHead_IterStart == startLoc) { + fCurr = list.fHead; + } else { + SkASSERT(kTail_IterStart == startLoc); + fCurr = list.fTail; + } + + return fCurr; + } + + T* get() { return fCurr; } + + /** + * Return the next/previous element in the list or NULL if at the end. + */ + T* next() { + if (nullptr == fCurr) { + return nullptr; + } + + fCurr = fCurr->fNext; + return fCurr; + } + + T* prev() { + if (nullptr == fCurr) { + return nullptr; + } + + fCurr = fCurr->fPrev; + return fCurr; + } + + /** + * C++11 range-for interface. + */ + bool operator!=(const Iter& that) { return fCurr != that.fCurr; } + T* operator*() { return this->get(); } + void operator++() { this->next(); } + + private: + T* fCurr; + }; + + Iter begin() const { + Iter iter; + iter.init(*this, Iter::kHead_IterStart); + return iter; + } + + Iter end() const { return Iter(); } + +#ifdef SK_DEBUG + void validate() const { + SkASSERT(!fHead == !fTail); + Iter iter; + for (T* item = iter.init(*this, Iter::kHead_IterStart); item; item = iter.next()) { + SkASSERT(this->isInList(item)); + if (nullptr == item->fPrev) { + SkASSERT(fHead == item); + } else { + SkASSERT(item->fPrev->fNext == item); + } + if (nullptr == item->fNext) { + SkASSERT(fTail == item); + } else { + SkASSERT(item->fNext->fPrev == item); + } + } + } + + /** + * Debugging-only method that uses the list back pointer to check if 'entry' is indeed in 'this' + * list. + */ + bool isInList(const T* entry) const { + return entry->fList == this; + } + + /** + * Debugging-only method that laboriously counts the list entries. + */ + int countEntries() const { + int count = 0; + for (T* entry = fHead; entry; entry = entry->fNext) { + ++count; + } + return count; + } +#endif // SK_DEBUG + +private: + T* fHead = nullptr; + T* fTail = nullptr; + + SkTInternalLList(const SkTInternalLList&) = delete; + SkTInternalLList& operator=(const SkTInternalLList&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkTLazy.h b/gfx/skia/skia/src/base/SkTLazy.h new file mode 100644 index 0000000000..38b3b373db --- /dev/null +++ b/gfx/skia/skia/src/base/SkTLazy.h @@ -0,0 +1,208 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTLazy_DEFINED +#define SkTLazy_DEFINED + +#include "include/private/base/SkAssert.h" + +#include +#include + +/** + * Efficient way to defer allocating/initializing a class until it is needed + * (if ever). + */ +template class SkTLazy { +public: + SkTLazy() = default; + explicit SkTLazy(const T* src) : fValue(src ? std::optional(*src) : std::nullopt) {} + SkTLazy(const SkTLazy& that) : fValue(that.fValue) {} + SkTLazy(SkTLazy&& that) : fValue(std::move(that.fValue)) {} + + ~SkTLazy() = default; + + SkTLazy& operator=(const SkTLazy& that) { + fValue = that.fValue; + return *this; + } + + SkTLazy& operator=(SkTLazy&& that) { + fValue = std::move(that.fValue); + return *this; + } + + /** + * Return a pointer to an instance of the class initialized with 'args'. + * If a previous instance had been initialized (either from init() or + * set()) it will first be destroyed, so that a freshly initialized + * instance is always returned. + */ + template T* init(Args&&... args) { + fValue.emplace(std::forward(args)...); + return this->get(); + } + + /** + * Copy src into this, and return a pointer to a copy of it. Note this + * will always return the same pointer, so if it is called on a lazy that + * has already been initialized, then this will copy over the previous + * contents. + */ + T* set(const T& src) { + fValue = src; + return this->get(); + } + + T* set(T&& src) { + fValue = std::move(src); + return this->get(); + } + + /** + * Destroy the lazy object (if it was created via init() or set()) + */ + void reset() { + fValue.reset(); + } + + /** + * Returns true if a valid object has been initialized in the SkTLazy, + * false otherwise. + */ + bool isValid() const { return fValue.has_value(); } + + /** + * Returns the object. This version should only be called when the caller + * knows that the object has been initialized. + */ + T* get() { + SkASSERT(fValue.has_value()); + return &fValue.value(); + } + const T* get() const { + SkASSERT(fValue.has_value()); + return &fValue.value(); + } + + T* operator->() { return this->get(); } + const T* operator->() const { return this->get(); } + + T& operator*() { + SkASSERT(fValue.has_value()); + return *fValue; + } + const T& operator*() const { + SkASSERT(fValue.has_value()); + return *fValue; + } + + /** + * Like above but doesn't assert if object isn't initialized (in which case + * nullptr is returned). + */ + const T* getMaybeNull() const { return fValue.has_value() ? this->get() : nullptr; } + T* getMaybeNull() { return fValue.has_value() ? this->get() : nullptr; } + +private: + std::optional fValue; +}; + +/** + * A helper built on top of std::optional to do copy-on-first-write. The object is initialized + * with a const pointer but provides a non-const pointer accessor. The first time the + * accessor is called (if ever) the object is cloned. + * + * In the following example at most one copy of constThing is made: + * + * SkTCopyOnFirstWrite thing(&constThing); + * ... + * function_that_takes_a_const_thing_ptr(thing); // constThing is passed + * ... + * if (need_to_modify_thing()) { + * thing.writable()->modifyMe(); // makes a copy of constThing + * } + * ... + * x = thing->readSomething(); + * ... + * if (need_to_modify_thing_now()) { + * thing.writable()->changeMe(); // makes a copy of constThing if we didn't call modifyMe() + * } + * + * consume_a_thing(thing); // could be constThing or a modified copy. + */ +template +class SkTCopyOnFirstWrite { +public: + explicit SkTCopyOnFirstWrite(const T& initial) : fObj(&initial) {} + + explicit SkTCopyOnFirstWrite(const T* initial) : fObj(initial) {} + + // Constructor for delayed initialization. + SkTCopyOnFirstWrite() : fObj(nullptr) {} + + SkTCopyOnFirstWrite(const SkTCopyOnFirstWrite& that) { *this = that; } + SkTCopyOnFirstWrite( SkTCopyOnFirstWrite&& that) { *this = std::move(that); } + + SkTCopyOnFirstWrite& operator=(const SkTCopyOnFirstWrite& that) { + fLazy = that.fLazy; + fObj = fLazy.has_value() ? &fLazy.value() : that.fObj; + return *this; + } + + SkTCopyOnFirstWrite& operator=(SkTCopyOnFirstWrite&& that) { + fLazy = std::move(that.fLazy); + fObj = fLazy.has_value() ? &fLazy.value() : that.fObj; + return *this; + } + + // Should only be called once, and only if the default constructor was used. + void init(const T& initial) { + SkASSERT(!fObj); + SkASSERT(!fLazy.has_value()); + fObj = &initial; + } + + // If not already initialized, in-place instantiates the writable object + template + void initIfNeeded(Args&&... args) { + if (!fObj) { + SkASSERT(!fLazy.has_value()); + fObj = &fLazy.emplace(std::forward(args)...); + } + } + + /** + * Returns a writable T*. The first time this is called the initial object is cloned. + */ + T* writable() { + SkASSERT(fObj); + if (!fLazy.has_value()) { + fLazy = *fObj; + fObj = &fLazy.value(); + } + return &fLazy.value(); + } + + const T* get() const { return fObj; } + + /** + * Operators for treating this as though it were a const pointer. + */ + + const T *operator->() const { return fObj; } + + operator const T*() const { return fObj; } + + const T& operator *() const { return *fObj; } + +private: + const T* fObj; + std::optional fLazy; +}; + +#endif diff --git a/gfx/skia/skia/src/base/SkTSearch.cpp b/gfx/skia/skia/src/base/SkTSearch.cpp new file mode 100644 index 0000000000..d91772e03b --- /dev/null +++ b/gfx/skia/skia/src/base/SkTSearch.cpp @@ -0,0 +1,117 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#include "src/base/SkTSearch.h" + +#include "include/private/base/SkMalloc.h" + +#include +#include + +static inline const char* index_into_base(const char*const* base, int index, + size_t elemSize) +{ + return *(const char*const*)((const char*)base + index * elemSize); +} + +int SkStrSearch(const char*const* base, int count, const char target[], + size_t target_len, size_t elemSize) +{ + if (count <= 0) + return ~0; + + SkASSERT(base != nullptr); + + int lo = 0; + int hi = count - 1; + + while (lo < hi) + { + int mid = (hi + lo) >> 1; + const char* elem = index_into_base(base, mid, elemSize); + + int cmp = strncmp(elem, target, target_len); + if (cmp < 0) + lo = mid + 1; + else if (cmp > 0 || strlen(elem) > target_len) + hi = mid; + else + return mid; + } + + const char* elem = index_into_base(base, hi, elemSize); + int cmp = strncmp(elem, target, target_len); + if (cmp || strlen(elem) > target_len) + { + if (cmp < 0) + hi += 1; + hi = ~hi; + } + return hi; +} + +int SkStrSearch(const char*const* base, int count, const char target[], + size_t elemSize) +{ + return SkStrSearch(base, count, target, strlen(target), elemSize); +} + +int SkStrLCSearch(const char*const* base, int count, const char target[], + size_t len, size_t elemSize) +{ + SkASSERT(target); + + SkAutoAsciiToLC tolc(target, len); + + return SkStrSearch(base, count, tolc.lc(), len, elemSize); +} + +int SkStrLCSearch(const char*const* base, int count, const char target[], + size_t elemSize) +{ + return SkStrLCSearch(base, count, target, strlen(target), elemSize); +} + +////////////////////////////////////////////////////////////////////////////// + +SkAutoAsciiToLC::SkAutoAsciiToLC(const char str[], size_t len) +{ + // see if we need to compute the length + if ((long)len < 0) { + len = strlen(str); + } + fLength = len; + + // assign lc to our preallocated storage if len is small enough, or allocate + // it on the heap + char* lc; + if (len <= STORAGE) { + lc = fStorage; + } else { + lc = (char*)sk_malloc_throw(len + 1); + } + fLC = lc; + + // convert any asii to lower-case. we let non-ascii (utf8) chars pass + // through unchanged + for (int i = (int)(len - 1); i >= 0; --i) { + int c = str[i]; + if ((c & 0x80) == 0) { // is just ascii + c = tolower(c); + } + lc[i] = c; + } + lc[len] = 0; +} + +SkAutoAsciiToLC::~SkAutoAsciiToLC() +{ + if (fLC != fStorage) { + sk_free(fLC); + } +} diff --git a/gfx/skia/skia/src/base/SkTSearch.h b/gfx/skia/skia/src/base/SkTSearch.h new file mode 100644 index 0000000000..6ebd304029 --- /dev/null +++ b/gfx/skia/skia/src/base/SkTSearch.h @@ -0,0 +1,132 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkTSearch_DEFINED +#define SkTSearch_DEFINED + +#include "include/private/base/SkAssert.h" + +#include + +/** + * All of the SkTSearch variants want to return the index (0...N-1) of the + * found element, or the bit-not of where to insert the element. + * + * At a simple level, if the return value is negative, it was not found. + * + * For clients that want to insert the new element if it was not found, use + * the following logic: + * + * int index = SkTSearch(...); + * if (index >= 0) { + * // found at index + * } else { + * index = ~index; // now we are positive + * // insert at index + * } + */ + + +// The most general form of SkTSearch takes an array of T and a key of type K. A functor, less, is +// used to perform comparisons. It has two function operators: +// bool operator() (const T& t, const K& k) +// bool operator() (const K& t, const T& k) +template +int SkTSearch(const T base[], int count, const K& key, size_t elemSize, const LESS& less) +{ + SkASSERT(count >= 0); + if (count <= 0) { + return ~0; + } + + SkASSERT(base != nullptr); // base may be nullptr if count is zero + + int lo = 0; + int hi = count - 1; + + while (lo < hi) { + int mid = lo + ((hi - lo) >> 1); + const T* elem = (const T*)((const char*)base + mid * elemSize); + + if (less(*elem, key)) + lo = mid + 1; + else + hi = mid; + } + + const T* elem = (const T*)((const char*)base + hi * elemSize); + if (less(*elem, key)) { + hi += 1; + hi = ~hi; + } else if (less(key, *elem)) { + hi = ~hi; + } + return hi; +} + +// Specialization for case when T==K and the caller wants to use a function rather than functor. +template +int SkTSearch(const T base[], int count, const T& target, size_t elemSize) { + return SkTSearch(base, count, target, elemSize, + [](const T& a, const T& b) { return LESS(a, b); }); +} + +// Specialization for T==K, compare using op <. +template +int SkTSearch(const T base[], int count, const T& target, size_t elemSize) { + return SkTSearch(base, count, target, elemSize, [](const T& a, const T& b) { return a < b; }); +} + +// Specialization for case where domain is an array of T* and the key value is a T*, and you want +// to compare the T objects, not the pointers. +template +int SkTSearch(T* base[], int count, T* target, size_t elemSize) { + return SkTSearch(base, count, target, elemSize, + [](const T* t, const T* k) { return LESS(*t, *k); }); +} + +int SkStrSearch(const char*const* base, int count, const char target[], + size_t target_len, size_t elemSize); +int SkStrSearch(const char*const* base, int count, const char target[], + size_t elemSize); + +/** Like SkStrSearch, but treats target as if it were all lower-case. Assumes that + base points to a table of lower-case strings. +*/ +int SkStrLCSearch(const char*const* base, int count, const char target[], + size_t target_len, size_t elemSize); +int SkStrLCSearch(const char*const* base, int count, const char target[], + size_t elemSize); + +/** Helper class to convert a string to lower-case, but only modifying the ascii + characters. This makes the routine very fast and never changes the string + length, but it is not suitable for linguistic purposes. Normally this is + used for buiding and searching string tables. +*/ +class SkAutoAsciiToLC { +public: + SkAutoAsciiToLC(const char str[], size_t len = (size_t)-1); + ~SkAutoAsciiToLC(); + + const char* lc() const { return fLC; } + size_t length() const { return fLength; } + +private: + char* fLC; // points to either the heap or fStorage + size_t fLength; + enum { + STORAGE = 64 + }; + char fStorage[STORAGE+1]; +}; + +// Helper when calling qsort with a compare proc that has typed its arguments +#define SkCastForQSort(compare) reinterpret_cast(compare) + +#endif diff --git a/gfx/skia/skia/src/base/SkTSort.h b/gfx/skia/skia/src/base/SkTSort.h new file mode 100644 index 0000000000..a1d35cc158 --- /dev/null +++ b/gfx/skia/skia/src/base/SkTSort.h @@ -0,0 +1,214 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTSort_DEFINED +#define SkTSort_DEFINED + +#include "include/private/base/SkTo.h" +#include "src/base/SkMathPriv.h" + +#include +#include + +/////////////////////////////////////////////////////////////////////////////// + +/* Sifts a broken heap. The input array is a heap from root to bottom + * except that the root entry may be out of place. + * + * Sinks a hole from array[root] to leaf and then sifts the original array[root] element + * from the leaf level up. + * + * This version does extra work, in that it copies child to parent on the way down, + * then copies parent to child on the way back up. When copies are inexpensive, + * this is an optimization as this sift variant should only be used when + * the potentially out of place root entry value is expected to be small. + * + * @param root the one based index into array of the out-of-place root of the heap. + * @param bottom the one based index in the array of the last entry in the heap. + */ +template +void SkTHeapSort_SiftUp(T array[], size_t root, size_t bottom, const C& lessThan) { + T x = array[root-1]; + size_t start = root; + size_t j = root << 1; + while (j <= bottom) { + if (j < bottom && lessThan(array[j-1], array[j])) { + ++j; + } + array[root-1] = array[j-1]; + root = j; + j = root << 1; + } + j = root >> 1; + while (j >= start) { + if (lessThan(array[j-1], x)) { + array[root-1] = array[j-1]; + root = j; + j = root >> 1; + } else { + break; + } + } + array[root-1] = x; +} + +/* Sifts a broken heap. The input array is a heap from root to bottom + * except that the root entry may be out of place. + * + * Sifts the array[root] element from the root down. + * + * @param root the one based index into array of the out-of-place root of the heap. + * @param bottom the one based index in the array of the last entry in the heap. + */ +template +void SkTHeapSort_SiftDown(T array[], size_t root, size_t bottom, const C& lessThan) { + T x = array[root-1]; + size_t child = root << 1; + while (child <= bottom) { + if (child < bottom && lessThan(array[child-1], array[child])) { + ++child; + } + if (lessThan(x, array[child-1])) { + array[root-1] = array[child-1]; + root = child; + child = root << 1; + } else { + break; + } + } + array[root-1] = x; +} + +/** Sorts the array of size count using comparator lessThan using a Heap Sort algorithm. Be sure to + * specialize swap if T has an efficient swap operation. + * + * @param array the array to be sorted. + * @param count the number of elements in the array. + * @param lessThan a functor with bool operator()(T a, T b) which returns true if a comes before b. + */ +template void SkTHeapSort(T array[], size_t count, const C& lessThan) { + for (size_t i = count >> 1; i > 0; --i) { + SkTHeapSort_SiftDown(array, i, count, lessThan); + } + + for (size_t i = count - 1; i > 0; --i) { + using std::swap; + swap(array[0], array[i]); + SkTHeapSort_SiftUp(array, 1, i, lessThan); + } +} + +/** Sorts the array of size count using comparator '<' using a Heap Sort algorithm. */ +template void SkTHeapSort(T array[], size_t count) { + SkTHeapSort(array, count, [](const T& a, const T& b) { return a < b; }); +} + +/////////////////////////////////////////////////////////////////////////////// + +/** Sorts the array of size count using comparator lessThan using an Insertion Sort algorithm. */ +template +void SkTInsertionSort(T* left, int count, const C& lessThan) { + T* right = left + count - 1; + for (T* next = left + 1; next <= right; ++next) { + if (!lessThan(*next, *(next - 1))) { + continue; + } + T insert = std::move(*next); + T* hole = next; + do { + *hole = std::move(*(hole - 1)); + --hole; + } while (left < hole && lessThan(insert, *(hole - 1))); + *hole = std::move(insert); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +template +T* SkTQSort_Partition(T* left, int count, T* pivot, const C& lessThan) { + T* right = left + count - 1; + using std::swap; + T pivotValue = *pivot; + swap(*pivot, *right); + T* newPivot = left; + while (left < right) { + if (lessThan(*left, pivotValue)) { + swap(*left, *newPivot); + newPivot += 1; + } + left += 1; + } + swap(*newPivot, *right); + return newPivot; +} + +/* Introsort is a modified Quicksort. + * When the region to be sorted is a small constant size, it uses Insertion Sort. + * When depth becomes zero, it switches over to Heap Sort. + * This implementation recurses on the left region after pivoting and loops on the right, + * we already limit the stack depth by switching to heap sort, + * and cache locality on the data appears more important than saving a few stack frames. + * + * @param depth at this recursion depth, switch to Heap Sort. + * @param left points to the beginning of the region to be sorted + * @param count number of items to be sorted + * @param lessThan a functor/lambda which returns true if a comes before b. + */ +template +void SkTIntroSort(int depth, T* left, int count, const C& lessThan) { + for (;;) { + if (count <= 32) { + SkTInsertionSort(left, count, lessThan); + return; + } + + if (depth == 0) { + SkTHeapSort(left, count, lessThan); + return; + } + --depth; + + T* middle = left + ((count - 1) >> 1); + T* pivot = SkTQSort_Partition(left, count, middle, lessThan); + int pivotCount = pivot - left; + + SkTIntroSort(depth, left, pivotCount, lessThan); + left += pivotCount + 1; + count -= pivotCount + 1; + } +} + +/** Sorts the region from left to right using comparator lessThan using Introsort. + * Be sure to specialize `swap` if T has an efficient swap operation. + * + * @param begin points to the beginning of the region to be sorted + * @param end points past the end of the region to be sorted + * @param lessThan a functor/lambda which returns true if a comes before b. + */ +template +void SkTQSort(T* begin, T* end, const C& lessThan) { + int n = SkToInt(end - begin); + if (n <= 1) { + return; + } + // Limit Introsort recursion depth to no more than 2 * ceil(log2(n-1)). + int depth = 2 * SkNextLog2(n - 1); + SkTIntroSort(depth, begin, n, lessThan); +} + +/** Sorts the region from left to right using comparator 'a < b' using Introsort. */ +template void SkTQSort(T* begin, T* end) { + SkTQSort(begin, end, [](const T& a, const T& b) { return a < b; }); +} + +/** Sorts the region from left to right using comparator '*a < *b' using Introsort. */ +template void SkTQSort(T** begin, T** end) { + SkTQSort(begin, end, [](const T* a, const T* b) { return *a < *b; }); +} + +#endif diff --git a/gfx/skia/skia/src/base/SkThreadID.cpp b/gfx/skia/skia/src/base/SkThreadID.cpp new file mode 100644 index 0000000000..e5b7a06c7c --- /dev/null +++ b/gfx/skia/skia/src/base/SkThreadID.cpp @@ -0,0 +1,16 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkThreadID.h" + +#ifdef SK_BUILD_FOR_WIN + #include "src/base/SkLeanWindows.h" + SkThreadID SkGetThreadID() { return GetCurrentThreadId(); } +#else + #include + SkThreadID SkGetThreadID() { return (int64_t)pthread_self(); } +#endif diff --git a/gfx/skia/skia/src/base/SkUTF.cpp b/gfx/skia/skia/src/base/SkUTF.cpp new file mode 100644 index 0000000000..20325fb2b6 --- /dev/null +++ b/gfx/skia/skia/src/base/SkUTF.cpp @@ -0,0 +1,316 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#include "src/base/SkUTF.h" + +#include "include/private/base/SkTFitsIn.h" + +static constexpr inline int32_t left_shift(int32_t value, int32_t shift) { + return (int32_t) ((uint32_t) value << shift); +} + +template static constexpr bool is_align2(T x) { return 0 == (x & 1); } + +template static constexpr bool is_align4(T x) { return 0 == (x & 3); } + +static constexpr inline bool utf16_is_high_surrogate(uint16_t c) { return (c & 0xFC00) == 0xD800; } + +static constexpr inline bool utf16_is_low_surrogate(uint16_t c) { return (c & 0xFC00) == 0xDC00; } + +/** @returns -1 iff invalid UTF8 byte, + 0 iff UTF8 continuation byte, + 1 iff ASCII byte, + 2 iff leading byte of 2-byte sequence, + 3 iff leading byte of 3-byte sequence, and + 4 iff leading byte of 4-byte sequence. + I.e.: if return value > 0, then gives length of sequence. +*/ +static int utf8_byte_type(uint8_t c) { + if (c < 0x80) { + return 1; + } else if (c < 0xC0) { + return 0; + } else if (c >= 0xF5 || (c & 0xFE) == 0xC0) { // "octet values c0, c1, f5 to ff never appear" + return -1; + } else { + int value = (((0xe5 << 24) >> ((unsigned)c >> 4 << 1)) & 3) + 1; + // assert(value >= 2 && value <=4); + return value; + } +} +static bool utf8_type_is_valid_leading_byte(int type) { return type > 0; } + +static bool utf8_byte_is_continuation(uint8_t c) { return utf8_byte_type(c) == 0; } + +//////////////////////////////////////////////////////////////////////////////// + +int SkUTF::CountUTF8(const char* utf8, size_t byteLength) { + if (!utf8 && byteLength) { + return -1; + } + int count = 0; + const char* stop = utf8 + byteLength; + while (utf8 < stop) { + int type = utf8_byte_type(*(const uint8_t*)utf8); + if (!utf8_type_is_valid_leading_byte(type) || utf8 + type > stop) { + return -1; // Sequence extends beyond end. + } + while(type-- > 1) { + ++utf8; + if (!utf8_byte_is_continuation(*(const uint8_t*)utf8)) { + return -1; + } + } + ++utf8; + ++count; + } + return count; +} + +int SkUTF::CountUTF16(const uint16_t* utf16, size_t byteLength) { + if (!utf16 || !is_align2(intptr_t(utf16)) || !is_align2(byteLength)) { + return -1; + } + const uint16_t* src = (const uint16_t*)utf16; + const uint16_t* stop = src + (byteLength >> 1); + int count = 0; + while (src < stop) { + unsigned c = *src++; + if (utf16_is_low_surrogate(c)) { + return -1; + } + if (utf16_is_high_surrogate(c)) { + if (src >= stop) { + return -1; + } + c = *src++; + if (!utf16_is_low_surrogate(c)) { + return -1; + } + } + count += 1; + } + return count; +} + +int SkUTF::CountUTF32(const int32_t* utf32, size_t byteLength) { + if (!is_align4(intptr_t(utf32)) || !is_align4(byteLength) || !SkTFitsIn(byteLength >> 2)) { + return -1; + } + const uint32_t kInvalidUnicharMask = 0xFF000000; // unichar fits in 24 bits + const uint32_t* ptr = (const uint32_t*)utf32; + const uint32_t* stop = ptr + (byteLength >> 2); + while (ptr < stop) { + if (*ptr & kInvalidUnicharMask) { + return -1; + } + ptr += 1; + } + return (int)(byteLength >> 2); +} + +template +static SkUnichar next_fail(const T** ptr, const T* end) { + *ptr = end; + return -1; +} + +SkUnichar SkUTF::NextUTF8(const char** ptr, const char* end) { + if (!ptr || !end ) { + return -1; + } + const uint8_t* p = (const uint8_t*)*ptr; + if (!p || p >= (const uint8_t*)end) { + return next_fail(ptr, end); + } + int c = *p; + int hic = c << 24; + + if (!utf8_type_is_valid_leading_byte(utf8_byte_type(c))) { + return next_fail(ptr, end); + } + if (hic < 0) { + uint32_t mask = (uint32_t)~0x3F; + hic = left_shift(hic, 1); + do { + ++p; + if (p >= (const uint8_t*)end) { + return next_fail(ptr, end); + } + // check before reading off end of array. + uint8_t nextByte = *p; + if (!utf8_byte_is_continuation(nextByte)) { + return next_fail(ptr, end); + } + c = (c << 6) | (nextByte & 0x3F); + mask <<= 5; + } while ((hic = left_shift(hic, 1)) < 0); + c &= ~mask; + } + *ptr = (char*)p + 1; + return c; +} + +SkUnichar SkUTF::NextUTF16(const uint16_t** ptr, const uint16_t* end) { + if (!ptr || !end ) { + return -1; + } + const uint16_t* src = *ptr; + if (!src || src + 1 > end || !is_align2(intptr_t(src))) { + return next_fail(ptr, end); + } + uint16_t c = *src++; + SkUnichar result = c; + if (utf16_is_low_surrogate(c)) { + return next_fail(ptr, end); // srcPtr should never point at low surrogate. + } + if (utf16_is_high_surrogate(c)) { + if (src + 1 > end) { + return next_fail(ptr, end); // Truncated string. + } + uint16_t low = *src++; + if (!utf16_is_low_surrogate(low)) { + return next_fail(ptr, end); + } + /* + [paraphrased from wikipedia] + Take the high surrogate and subtract 0xD800, then multiply by 0x400. + Take the low surrogate and subtract 0xDC00. Add these two results + together, and finally add 0x10000 to get the final decoded codepoint. + + unicode = (high - 0xD800) * 0x400 + low - 0xDC00 + 0x10000 + unicode = (high * 0x400) - (0xD800 * 0x400) + low - 0xDC00 + 0x10000 + unicode = (high << 10) - (0xD800 << 10) + low - 0xDC00 + 0x10000 + unicode = (high << 10) + low - ((0xD800 << 10) + 0xDC00 - 0x10000) + */ + result = (result << 10) + (SkUnichar)low - ((0xD800 << 10) + 0xDC00 - 0x10000); + } + *ptr = src; + return result; +} + +SkUnichar SkUTF::NextUTF32(const int32_t** ptr, const int32_t* end) { + if (!ptr || !end ) { + return -1; + } + const int32_t* s = *ptr; + if (!s || s + 1 > end || !is_align4(intptr_t(s))) { + return next_fail(ptr, end); + } + int32_t value = *s; + const uint32_t kInvalidUnicharMask = 0xFF000000; // unichar fits in 24 bits + if (value & kInvalidUnicharMask) { + return next_fail(ptr, end); + } + *ptr = s + 1; + return value; +} + +size_t SkUTF::ToUTF8(SkUnichar uni, char utf8[SkUTF::kMaxBytesInUTF8Sequence]) { + if ((uint32_t)uni > 0x10FFFF) { + return 0; + } + if (uni <= 127) { + if (utf8) { + *utf8 = (char)uni; + } + return 1; + } + char tmp[4]; + char* p = tmp; + size_t count = 1; + while (uni > 0x7F >> count) { + *p++ = (char)(0x80 | (uni & 0x3F)); + uni >>= 6; + count += 1; + } + if (utf8) { + p = tmp; + utf8 += count; + while (p < tmp + count - 1) { + *--utf8 = *p++; + } + *--utf8 = (char)(~(0xFF >> count) | uni); + } + return count; +} + +size_t SkUTF::ToUTF16(SkUnichar uni, uint16_t utf16[2]) { + if ((uint32_t)uni > 0x10FFFF) { + return 0; + } + int extra = (uni > 0xFFFF); + if (utf16) { + if (extra) { + utf16[0] = (uint16_t)((0xD800 - 64) + (uni >> 10)); + utf16[1] = (uint16_t)(0xDC00 | (uni & 0x3FF)); + } else { + utf16[0] = (uint16_t)uni; + } + } + return 1 + extra; +} + +int SkUTF::UTF8ToUTF16(uint16_t dst[], int dstCapacity, const char src[], size_t srcByteLength) { + if (!dst) { + dstCapacity = 0; + } + + int dstLength = 0; + uint16_t* endDst = dst + dstCapacity; + const char* endSrc = src + srcByteLength; + while (src < endSrc) { + SkUnichar uni = NextUTF8(&src, endSrc); + if (uni < 0) { + return -1; + } + + uint16_t utf16[2]; + size_t count = ToUTF16(uni, utf16); + if (count == 0) { + return -1; + } + dstLength += count; + + if (dst) { + uint16_t* elems = utf16; + while (dst < endDst && count > 0) { + *dst++ = *elems++; + count -= 1; + } + } + } + return dstLength; +} + +int SkUTF::UTF16ToUTF8(char dst[], int dstCapacity, const uint16_t src[], size_t srcLength) { + if (!dst) { + dstCapacity = 0; + } + + int dstLength = 0; + const char* endDst = dst + dstCapacity; + const uint16_t* endSrc = src + srcLength; + while (src < endSrc) { + SkUnichar uni = NextUTF16(&src, endSrc); + if (uni < 0) { + return -1; + } + + char utf8[SkUTF::kMaxBytesInUTF8Sequence]; + size_t count = ToUTF8(uni, utf8); + if (count == 0) { + return -1; + } + dstLength += count; + + if (dst) { + const char* elems = utf8; + while (dst < endDst && count > 0) { + *dst++ = *elems++; + count -= 1; + } + } + } + return dstLength; +} diff --git a/gfx/skia/skia/src/base/SkUTF.h b/gfx/skia/skia/src/base/SkUTF.h new file mode 100644 index 0000000000..e50804da98 --- /dev/null +++ b/gfx/skia/skia/src/base/SkUTF.h @@ -0,0 +1,95 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkUTF_DEFINED +#define SkUTF_DEFINED + +#include "include/private/base/SkAPI.h" + +#include +#include + +typedef int32_t SkUnichar; + +namespace SkUTF { + +/** Given a sequence of UTF-8 bytes, return the number of unicode codepoints. + If the sequence is invalid UTF-8, return -1. +*/ +SK_SPI int CountUTF8(const char* utf8, size_t byteLength); + +/** Given a sequence of aligned UTF-16 characters in machine-endian form, + return the number of unicode codepoints. If the sequence is invalid + UTF-16, return -1. +*/ +SK_SPI int CountUTF16(const uint16_t* utf16, size_t byteLength); + +/** Given a sequence of aligned UTF-32 characters in machine-endian form, + return the number of unicode codepoints. If the sequence is invalid + UTF-32, return -1. +*/ +SK_SPI int CountUTF32(const int32_t* utf32, size_t byteLength); + +/** Given a sequence of UTF-8 bytes, return the first unicode codepoint. + The pointer will be incremented to point at the next codepoint's start. If + invalid UTF-8 is encountered, set *ptr to end and return -1. +*/ +SK_SPI SkUnichar NextUTF8(const char** ptr, const char* end); + +/** Given a sequence of aligned UTF-16 characters in machine-endian form, + return the first unicode codepoint. The pointer will be incremented to + point at the next codepoint's start. If invalid UTF-16 is encountered, + set *ptr to end and return -1. +*/ +SK_SPI SkUnichar NextUTF16(const uint16_t** ptr, const uint16_t* end); + +/** Given a sequence of aligned UTF-32 characters in machine-endian form, + return the first unicode codepoint. The pointer will be incremented to + point at the next codepoint's start. If invalid UTF-32 is encountered, + set *ptr to end and return -1. +*/ +SK_SPI SkUnichar NextUTF32(const int32_t** ptr, const int32_t* end); + +constexpr unsigned kMaxBytesInUTF8Sequence = 4; + +/** Convert the unicode codepoint into UTF-8. If `utf8` is non-null, place the + result in that array. Return the number of bytes in the result. If `utf8` + is null, simply return the number of bytes that would be used. For invalid + unicode codepoints, return 0. +*/ +SK_SPI size_t ToUTF8(SkUnichar uni, char utf8[kMaxBytesInUTF8Sequence] = nullptr); + +/** Convert the unicode codepoint into UTF-16. If `utf16` is non-null, place + the result in that array. Return the number of UTF-16 code units in the + result (1 or 2). If `utf16` is null, simply return the number of code + units that would be used. For invalid unicode codepoints, return 0. +*/ +SK_SPI size_t ToUTF16(SkUnichar uni, uint16_t utf16[2] = nullptr); + +/** Returns the number of resulting UTF16 values needed to convert the src utf8 sequence. + * If dst is not null, it is filled with the corresponding values up to its capacity. + * If there is an error, -1 is returned and the dst[] buffer is undefined. + */ +SK_SPI int UTF8ToUTF16(uint16_t dst[], int dstCapacity, const char src[], size_t srcByteLength); + +/** Returns the number of resulting UTF8 values needed to convert the src utf16 sequence. + * If dst is not null, it is filled with the corresponding values up to its capacity. + * If there is an error, -1 is returned and the dst[] buffer is undefined. + */ +SK_SPI int UTF16ToUTF8(char dst[], int dstCapacity, const uint16_t src[], size_t srcLength); + +/** + * Given a UTF-16 code point, returns true iff it is a leading surrogate. + * https://unicode.org/faq/utf_bom.html#utf16-2 + */ +static inline bool IsLeadingSurrogateUTF16(uint16_t c) { return ((c) & 0xFC00) == 0xD800; } + +/** + * Given a UTF-16 code point, returns true iff it is a trailing surrogate. + * https://unicode.org/faq/utf_bom.html#utf16-2 + */ +static inline bool IsTrailingSurrogateUTF16(uint16_t c) { return ((c) & 0xFC00) == 0xDC00; } + + +} // namespace SkUTF + +#endif // SkUTF_DEFINED diff --git a/gfx/skia/skia/src/base/SkUtils.cpp b/gfx/skia/skia/src/base/SkUtils.cpp new file mode 100644 index 0000000000..b9852e9389 --- /dev/null +++ b/gfx/skia/skia/src/base/SkUtils.cpp @@ -0,0 +1,13 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkUtils.h" + +const char SkHexadecimalDigits::gUpper[16] = + { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; +const char SkHexadecimalDigits::gLower[16] = + { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; diff --git a/gfx/skia/skia/src/base/SkUtils.h b/gfx/skia/skia/src/base/SkUtils.h new file mode 100644 index 0000000000..ae2331dfca --- /dev/null +++ b/gfx/skia/skia/src/base/SkUtils.h @@ -0,0 +1,55 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkUtils_DEFINED +#define SkUtils_DEFINED + +#include "include/private/base/SkAttributes.h" + +#include +#include // is_trivially_copyable + +namespace SkHexadecimalDigits { + extern const char gUpper[16]; // 0-9A-F + extern const char gLower[16]; // 0-9a-f +} // namespace SkHexadecimalDigits + +/////////////////////////////////////////////////////////////////////////////// + +// If T is an 8-byte GCC or Clang vector extension type, it would naturally +// pass or return in the MMX mm0 register on 32-bit x86 builds. This has the +// fun side effect of clobbering any state in the x87 st0 register. (There is +// no ABI governing who should preserve mm?/st? registers, so no one does!) +// +// We force-inline sk_unaligned_load() and sk_unaligned_store() to avoid that, +// making them safe to use for all types on all platforms, thus solving the +// problem once and for all! + +template +static SK_ALWAYS_INLINE T sk_unaligned_load(const P* ptr) { + static_assert(std::is_trivially_copyable::value); + static_assert(std::is_trivially_copyable

::value); + T val; + memcpy(&val, ptr, sizeof(val)); + return val; +} + +template +static SK_ALWAYS_INLINE void sk_unaligned_store(P* ptr, T val) { + static_assert(std::is_trivially_copyable::value); + static_assert(std::is_trivially_copyable

::value); + memcpy(ptr, &val, sizeof(val)); +} + +// Copy the bytes from src into an instance of type Dst and return it. +template +static SK_ALWAYS_INLINE Dst sk_bit_cast(const Src& src) { + static_assert(sizeof(Dst) == sizeof(Src)); + return sk_unaligned_load(&src); +} + +#endif diff --git a/gfx/skia/skia/src/base/SkVx.h b/gfx/skia/skia/src/base/SkVx.h new file mode 100644 index 0000000000..a1731ad0c4 --- /dev/null +++ b/gfx/skia/skia/src/base/SkVx.h @@ -0,0 +1,1183 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKVX_DEFINED +#define SKVX_DEFINED + +// skvx::Vec are SIMD vectors of N T's, a v1.5 successor to SkNx. +// +// This time we're leaning a bit less on platform-specific intrinsics and a bit +// more on Clang/GCC vector extensions, but still keeping the option open to +// drop in platform-specific intrinsics, actually more easily than before. +// +// We've also fixed a few of the caveats that used to make SkNx awkward to work +// with across translation units. skvx::Vec always has N*sizeof(T) size +// and alignment and is safe to use across translation units freely. +// (Ideally we'd only align to T, but that tanks ARMv7 NEON codegen.) + +// Please try to keep this file independent of Skia headers. +#include // std::min, std::max +#include // assert() +#include // ceilf, floorf, truncf, roundf, sqrtf, etc. +#include // intXX_t +#include // memcpy() +#include // std::initializer_list +#include +#include // std::index_sequence + +// Users may disable SIMD with SKNX_NO_SIMD, which may be set via compiler flags. +// The gn build has no option which sets SKNX_NO_SIMD. +// Use SKVX_USE_SIMD internally to avoid confusing double negation. +// Do not use 'defined' in a macro expansion. +#if !defined(SKNX_NO_SIMD) + #define SKVX_USE_SIMD 1 +#else + #define SKVX_USE_SIMD 0 +#endif + +#if SKVX_USE_SIMD + #if defined(__SSE__) || defined(__AVX__) || defined(__AVX2__) + #include + #elif defined(__ARM_NEON) + #include + #elif defined(__wasm_simd128__) + #include + #endif +#endif + +// To avoid ODR violations, all methods must be force-inlined... +#if defined(_MSC_VER) + #define SKVX_ALWAYS_INLINE __forceinline +#else + #define SKVX_ALWAYS_INLINE __attribute__((always_inline)) +#endif + +// ... and all standalone functions must be static. Please use these helpers: +#define SI static inline +#define SIT template < typename T> SI +#define SIN template SI +#define SINT template SI +#define SINTU template ::value>> SI + +namespace skvx { + +template +struct alignas(N*sizeof(T)) Vec; + +template +SI Vec shuffle(const Vec&); + +template +SI D bit_pun(const S& s) { + static_assert(sizeof(D) == sizeof(S)); + D d; + memcpy(&d, &s, sizeof(D)); + return d; +} + +// All Vec have the same simple memory layout, the same as `T vec[N]`. +template +struct alignas(N*sizeof(T)) VecStorage { + SKVX_ALWAYS_INLINE VecStorage() = default; + SKVX_ALWAYS_INLINE VecStorage(T s) : lo(s), hi(s) {} + + Vec lo, hi; +}; + +template +struct VecStorage<4,T> { + SKVX_ALWAYS_INLINE VecStorage() = default; + SKVX_ALWAYS_INLINE VecStorage(T s) : lo(s), hi(s) {} + SKVX_ALWAYS_INLINE VecStorage(T x, T y, T z, T w) : lo(x,y), hi(z, w) {} + SKVX_ALWAYS_INLINE VecStorage(Vec<2,T> xy, T z, T w) : lo(xy), hi(z,w) {} + SKVX_ALWAYS_INLINE VecStorage(T x, T y, Vec<2,T> zw) : lo(x,y), hi(zw) {} + SKVX_ALWAYS_INLINE VecStorage(Vec<2,T> xy, Vec<2,T> zw) : lo(xy), hi(zw) {} + + SKVX_ALWAYS_INLINE Vec<2,T>& xy() { return lo; } + SKVX_ALWAYS_INLINE Vec<2,T>& zw() { return hi; } + SKVX_ALWAYS_INLINE T& x() { return lo.lo.val; } + SKVX_ALWAYS_INLINE T& y() { return lo.hi.val; } + SKVX_ALWAYS_INLINE T& z() { return hi.lo.val; } + SKVX_ALWAYS_INLINE T& w() { return hi.hi.val; } + + SKVX_ALWAYS_INLINE Vec<2,T> xy() const { return lo; } + SKVX_ALWAYS_INLINE Vec<2,T> zw() const { return hi; } + SKVX_ALWAYS_INLINE T x() const { return lo.lo.val; } + SKVX_ALWAYS_INLINE T y() const { return lo.hi.val; } + SKVX_ALWAYS_INLINE T z() const { return hi.lo.val; } + SKVX_ALWAYS_INLINE T w() const { return hi.hi.val; } + + // Exchange-based swizzles. These should take 1 cycle on NEON and 3 (pipelined) cycles on SSE. + SKVX_ALWAYS_INLINE Vec<4,T> yxwz() const { return shuffle<1,0,3,2>(bit_pun>(*this)); } + SKVX_ALWAYS_INLINE Vec<4,T> zwxy() const { return shuffle<2,3,0,1>(bit_pun>(*this)); } + + Vec<2,T> lo, hi; +}; + +template +struct VecStorage<2,T> { + SKVX_ALWAYS_INLINE VecStorage() = default; + SKVX_ALWAYS_INLINE VecStorage(T s) : lo(s), hi(s) {} + SKVX_ALWAYS_INLINE VecStorage(T x, T y) : lo(x), hi(y) {} + + SKVX_ALWAYS_INLINE T& x() { return lo.val; } + SKVX_ALWAYS_INLINE T& y() { return hi.val; } + + SKVX_ALWAYS_INLINE T x() const { return lo.val; } + SKVX_ALWAYS_INLINE T y() const { return hi.val; } + + // This exchange-based swizzle should take 1 cycle on NEON and 3 (pipelined) cycles on SSE. + SKVX_ALWAYS_INLINE Vec<2,T> yx() const { return shuffle<1,0>(bit_pun>(*this)); } + + SKVX_ALWAYS_INLINE Vec<4,T> xyxy() const { + return Vec<4,T>(bit_pun>(*this), bit_pun>(*this)); + } + + Vec<1,T> lo, hi; +}; + +// Translate from a value type T to its corresponding Mask, the result of a comparison. +template struct Mask { using type = T; }; +template <> struct Mask { using type = int32_t; }; +template <> struct Mask { using type = int64_t; }; +template using M = typename Mask::type; + +template +struct NoConversion { T vals[N]; }; + +template +struct ConvertNative { + typedef NoConversion type; +}; + +#if SKVX_USE_SIMD && defined(__SSE__) +template<> +struct ConvertNative<4, float> { + typedef __m128 type; +}; + +template<> +struct ConvertNative<4, int32_t> { + typedef __m128i type; +}; + +template <> +struct ConvertNative<4, uint32_t> { + typedef __m128i type; +}; + +template<> +struct ConvertNative<8, int16_t> { + typedef __m128i type; +}; + +template <> +struct ConvertNative<8, uint16_t> { + typedef __m128i type; +}; + +template <> +struct ConvertNative<16, uint8_t> { + typedef __m128i type; +}; +#endif + +#if SKVX_USE_SIMD && defined(__AVX__) +template<> +struct ConvertNative<8, float> { + typedef __m256 type; +}; + +template<> +struct ConvertNative<8, int32_t> { + typedef __m256i type; +}; + +template <> +struct ConvertNative<8, uint32_t> { + typedef __m256i type; +}; + +template<> +struct ConvertNative<16, int16_t> { + typedef __m256i type; +}; + +template <> +struct ConvertNative<16, uint16_t> { + typedef __m256i type; +}; +#endif + +#if SKVX_USE_SIMD && defined(__ARM_NEON) +template<> +struct ConvertNative<4, float> { + typedef float32x4_t type; +}; + +template<> +struct ConvertNative<4, int32_t> { + typedef int32x4_t type; +}; + +template <> +struct ConvertNative<4, uint32_t> { + typedef uint32x4_t type; +}; + +template<> +struct ConvertNative<4, int16_t> { + typedef int16x4_t type; +}; + +template <> +struct ConvertNative<4, uint16_t> { + typedef uint16x4_t type; +}; + +template<> +struct ConvertNative<8, int16_t> { + typedef int16x8_t type; +}; + +template <> +struct ConvertNative<8, uint16_t> { + typedef uint16x8_t type; +}; + +template <> +struct ConvertNative<8, uint8_t> { + typedef uint8x8_t type; +}; +#endif + +template +struct alignas(N*sizeof(T)) Vec : public VecStorage { + typedef T elem_type; + + static_assert((N & (N-1)) == 0, "N must be a power of 2."); + static_assert(sizeof(T) >= alignof(T), "What kind of unusual T is this?"); + + // Methods belong here in the class declaration of Vec only if: + // - they must be here, like constructors or operator[]; + // - they'll definitely never want a specialized implementation. + // Other operations on Vec should be defined outside the type. + + SKVX_ALWAYS_INLINE Vec() = default; + SKVX_ALWAYS_INLINE Vec(typename ConvertNative::type native) : Vec(bit_pun(native)) {} + + using VecStorage::VecStorage; + + // NOTE: Vec{x} produces x000..., whereas Vec(x) produces xxxx.... since this constructor fills + // unspecified lanes with 0s, whereas the single T constructor fills all lanes with the value. + SKVX_ALWAYS_INLINE Vec(std::initializer_list xs) { + T vals[N] = {0}; + memcpy(vals, xs.begin(), std::min(xs.size(), (size_t)N)*sizeof(T)); + + this->lo = Vec::Load(vals + 0); + this->hi = Vec::Load(vals + N/2); + } + + operator typename ConvertNative::type() const { return bit_pun::type>(*this); } + + SKVX_ALWAYS_INLINE T operator[](int i) const { return ilo[i] : this->hi[i-N/2]; } + SKVX_ALWAYS_INLINE T& operator[](int i) { return ilo[i] : this->hi[i-N/2]; } + + SKVX_ALWAYS_INLINE static Vec Load(const void* ptr) { + Vec v; + memcpy(&v, ptr, sizeof(Vec)); + return v; + } + SKVX_ALWAYS_INLINE void store(void* ptr) const { + memcpy(ptr, this, sizeof(Vec)); + } +}; + +template +struct Vec<1,T> { + typedef T elem_type; + + T val; + + SKVX_ALWAYS_INLINE Vec() = default; + + Vec(T s) : val(s) {} + + SKVX_ALWAYS_INLINE Vec(std::initializer_list xs) : val(xs.size() ? *xs.begin() : 0) {} + + SKVX_ALWAYS_INLINE T operator[](int) const { return val; } + SKVX_ALWAYS_INLINE T& operator[](int) { return val; } + + SKVX_ALWAYS_INLINE static Vec Load(const void* ptr) { + Vec v; + memcpy(&v, ptr, sizeof(Vec)); + return v; + } + SKVX_ALWAYS_INLINE void store(void* ptr) const { + memcpy(ptr, this, sizeof(Vec)); + } +}; + +// Join two Vec into one Vec<2N,T>. +SINT Vec<2*N,T> join(const Vec& lo, const Vec& hi) { + Vec<2*N,T> v; + v.lo = lo; + v.hi = hi; + return v; +} + +// We have three strategies for implementing Vec operations: +// 1) lean on Clang/GCC vector extensions when available; +// 2) use map() to apply a scalar function lane-wise; +// 3) recurse on lo/hi to scalar portable implementations. +// We can slot in platform-specific implementations as overloads for particular Vec, +// or often integrate them directly into the recursion of style 3), allowing fine control. + +#if SKVX_USE_SIMD && (defined(__clang__) || defined(__GNUC__)) + + // VExt types have the same size as Vec and support most operations directly. + #if defined(__clang__) + template + using VExt = T __attribute__((ext_vector_type(N))); + + #elif defined(__GNUC__) + template + struct VExtHelper { + typedef T __attribute__((vector_size(N*sizeof(T)))) type; + }; + + template + using VExt = typename VExtHelper::type; + + // For some reason some (new!) versions of GCC cannot seem to deduce N in the generic + // to_vec() below for N=4 and T=float. This workaround seems to help... + SI Vec<4,float> to_vec(VExt<4,float> v) { return bit_pun>(v); } + #endif + + SINT VExt to_vext(const Vec& v) { return bit_pun>(v); } + SINT Vec to_vec(const VExt& v) { return bit_pun>(v); } + + SINT Vec operator+(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) + to_vext(y)); + } + SINT Vec operator-(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) - to_vext(y)); + } + SINT Vec operator*(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) * to_vext(y)); + } + SINT Vec operator/(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) / to_vext(y)); + } + + SINT Vec operator^(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) ^ to_vext(y)); + } + SINT Vec operator&(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) & to_vext(y)); + } + SINT Vec operator|(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) | to_vext(y)); + } + SINT Vec operator&&(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) & to_vext(y)); + } + SINT Vec operator||(const Vec& x, const Vec& y) { + return to_vec(to_vext(x) | to_vext(y)); + } + + SINT Vec operator!(const Vec& x) { return to_vec(!to_vext(x)); } + SINT Vec operator-(const Vec& x) { return to_vec(-to_vext(x)); } + SINT Vec operator~(const Vec& x) { return to_vec(~to_vext(x)); } + + SINT Vec operator<<(const Vec& x, int k) { return to_vec(to_vext(x) << k); } + SINT Vec operator>>(const Vec& x, int k) { return to_vec(to_vext(x) >> k); } + + SINT Vec> operator==(const Vec& x, const Vec& y) { + return bit_pun>>(to_vext(x) == to_vext(y)); + } + SINT Vec> operator!=(const Vec& x, const Vec& y) { + return bit_pun>>(to_vext(x) != to_vext(y)); + } + SINT Vec> operator<=(const Vec& x, const Vec& y) { + return bit_pun>>(to_vext(x) <= to_vext(y)); + } + SINT Vec> operator>=(const Vec& x, const Vec& y) { + return bit_pun>>(to_vext(x) >= to_vext(y)); + } + SINT Vec> operator< (const Vec& x, const Vec& y) { + return bit_pun>>(to_vext(x) < to_vext(y)); + } + SINT Vec> operator> (const Vec& x, const Vec& y) { + return bit_pun>>(to_vext(x) > to_vext(y)); + } + +#else + + // Either SKNX_NO_SIMD is defined, or Clang/GCC vector extensions are not available. + // We'll implement things portably with N==1 scalar implementations and recursion onto them. + + // N == 1 scalar implementations. + SIT Vec<1,T> operator+(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val + y.val; } + SIT Vec<1,T> operator-(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val - y.val; } + SIT Vec<1,T> operator*(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val * y.val; } + SIT Vec<1,T> operator/(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val / y.val; } + + SIT Vec<1,T> operator^(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val ^ y.val; } + SIT Vec<1,T> operator&(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val & y.val; } + SIT Vec<1,T> operator|(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val | y.val; } + SIT Vec<1,T> operator&&(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val & y.val; } + SIT Vec<1,T> operator||(const Vec<1,T>& x, const Vec<1,T>& y) { return x.val | y.val; } + + SIT Vec<1,T> operator!(const Vec<1,T>& x) { return !x.val; } + SIT Vec<1,T> operator-(const Vec<1,T>& x) { return -x.val; } + SIT Vec<1,T> operator~(const Vec<1,T>& x) { return ~x.val; } + + SIT Vec<1,T> operator<<(const Vec<1,T>& x, int k) { return x.val << k; } + SIT Vec<1,T> operator>>(const Vec<1,T>& x, int k) { return x.val >> k; } + + SIT Vec<1,M> operator==(const Vec<1,T>& x, const Vec<1,T>& y) { + return x.val == y.val ? ~0 : 0; + } + SIT Vec<1,M> operator!=(const Vec<1,T>& x, const Vec<1,T>& y) { + return x.val != y.val ? ~0 : 0; + } + SIT Vec<1,M> operator<=(const Vec<1,T>& x, const Vec<1,T>& y) { + return x.val <= y.val ? ~0 : 0; + } + SIT Vec<1,M> operator>=(const Vec<1,T>& x, const Vec<1,T>& y) { + return x.val >= y.val ? ~0 : 0; + } + SIT Vec<1,M> operator< (const Vec<1,T>& x, const Vec<1,T>& y) { + return x.val < y.val ? ~0 : 0; + } + SIT Vec<1,M> operator> (const Vec<1,T>& x, const Vec<1,T>& y) { + return x.val > y.val ? ~0 : 0; + } + + // Recurse on lo/hi down to N==1 scalar implementations. + SINT Vec operator+(const Vec& x, const Vec& y) { + return join(x.lo + y.lo, x.hi + y.hi); + } + SINT Vec operator-(const Vec& x, const Vec& y) { + return join(x.lo - y.lo, x.hi - y.hi); + } + SINT Vec operator*(const Vec& x, const Vec& y) { + return join(x.lo * y.lo, x.hi * y.hi); + } + SINT Vec operator/(const Vec& x, const Vec& y) { + return join(x.lo / y.lo, x.hi / y.hi); + } + + SINT Vec operator^(const Vec& x, const Vec& y) { + return join(x.lo ^ y.lo, x.hi ^ y.hi); + } + SINT Vec operator&(const Vec& x, const Vec& y) { + return join(x.lo & y.lo, x.hi & y.hi); + } + SINT Vec operator|(const Vec& x, const Vec& y) { + return join(x.lo | y.lo, x.hi | y.hi); + } + SINT Vec operator&&(const Vec& x, const Vec& y) { + return join(x.lo & y.lo, x.hi & y.hi); + } + SINT Vec operator||(const Vec& x, const Vec& y) { + return join(x.lo | y.lo, x.hi | y.hi); + } + + SINT Vec operator!(const Vec& x) { return join(!x.lo, !x.hi); } + SINT Vec operator-(const Vec& x) { return join(-x.lo, -x.hi); } + SINT Vec operator~(const Vec& x) { return join(~x.lo, ~x.hi); } + + SINT Vec operator<<(const Vec& x, int k) { return join(x.lo << k, x.hi << k); } + SINT Vec operator>>(const Vec& x, int k) { return join(x.lo >> k, x.hi >> k); } + + SINT Vec> operator==(const Vec& x, const Vec& y) { + return join(x.lo == y.lo, x.hi == y.hi); + } + SINT Vec> operator!=(const Vec& x, const Vec& y) { + return join(x.lo != y.lo, x.hi != y.hi); + } + SINT Vec> operator<=(const Vec& x, const Vec& y) { + return join(x.lo <= y.lo, x.hi <= y.hi); + } + SINT Vec> operator>=(const Vec& x, const Vec& y) { + return join(x.lo >= y.lo, x.hi >= y.hi); + } + SINT Vec> operator< (const Vec& x, const Vec& y) { + return join(x.lo < y.lo, x.hi < y.hi); + } + SINT Vec> operator> (const Vec& x, const Vec& y) { + return join(x.lo > y.lo, x.hi > y.hi); + } +#endif + +// Scalar/vector operations splat the scalar to a vector. +SINTU Vec operator+ (U x, const Vec& y) { return Vec(x) + y; } +SINTU Vec operator- (U x, const Vec& y) { return Vec(x) - y; } +SINTU Vec operator* (U x, const Vec& y) { return Vec(x) * y; } +SINTU Vec operator/ (U x, const Vec& y) { return Vec(x) / y; } +SINTU Vec operator^ (U x, const Vec& y) { return Vec(x) ^ y; } +SINTU Vec operator& (U x, const Vec& y) { return Vec(x) & y; } +SINTU Vec operator| (U x, const Vec& y) { return Vec(x) | y; } +SINTU Vec operator&&(U x, const Vec& y) { return Vec(x) && y; } +SINTU Vec operator||(U x, const Vec& y) { return Vec(x) || y; } +SINTU Vec> operator==(U x, const Vec& y) { return Vec(x) == y; } +SINTU Vec> operator!=(U x, const Vec& y) { return Vec(x) != y; } +SINTU Vec> operator<=(U x, const Vec& y) { return Vec(x) <= y; } +SINTU Vec> operator>=(U x, const Vec& y) { return Vec(x) >= y; } +SINTU Vec> operator< (U x, const Vec& y) { return Vec(x) < y; } +SINTU Vec> operator> (U x, const Vec& y) { return Vec(x) > y; } + +SINTU Vec operator+ (const Vec& x, U y) { return x + Vec(y); } +SINTU Vec operator- (const Vec& x, U y) { return x - Vec(y); } +SINTU Vec operator* (const Vec& x, U y) { return x * Vec(y); } +SINTU Vec operator/ (const Vec& x, U y) { return x / Vec(y); } +SINTU Vec operator^ (const Vec& x, U y) { return x ^ Vec(y); } +SINTU Vec operator& (const Vec& x, U y) { return x & Vec(y); } +SINTU Vec operator| (const Vec& x, U y) { return x | Vec(y); } +SINTU Vec operator&&(const Vec& x, U y) { return x && Vec(y); } +SINTU Vec operator||(const Vec& x, U y) { return x || Vec(y); } +SINTU Vec> operator==(const Vec& x, U y) { return x == Vec(y); } +SINTU Vec> operator!=(const Vec& x, U y) { return x != Vec(y); } +SINTU Vec> operator<=(const Vec& x, U y) { return x <= Vec(y); } +SINTU Vec> operator>=(const Vec& x, U y) { return x >= Vec(y); } +SINTU Vec> operator< (const Vec& x, U y) { return x < Vec(y); } +SINTU Vec> operator> (const Vec& x, U y) { return x > Vec(y); } + +SINT Vec& operator+=(Vec& x, const Vec& y) { return (x = x + y); } +SINT Vec& operator-=(Vec& x, const Vec& y) { return (x = x - y); } +SINT Vec& operator*=(Vec& x, const Vec& y) { return (x = x * y); } +SINT Vec& operator/=(Vec& x, const Vec& y) { return (x = x / y); } +SINT Vec& operator^=(Vec& x, const Vec& y) { return (x = x ^ y); } +SINT Vec& operator&=(Vec& x, const Vec& y) { return (x = x & y); } +SINT Vec& operator|=(Vec& x, const Vec& y) { return (x = x | y); } + +SINTU Vec& operator+=(Vec& x, U y) { return (x = x + Vec(y)); } +SINTU Vec& operator-=(Vec& x, U y) { return (x = x - Vec(y)); } +SINTU Vec& operator*=(Vec& x, U y) { return (x = x * Vec(y)); } +SINTU Vec& operator/=(Vec& x, U y) { return (x = x / Vec(y)); } +SINTU Vec& operator^=(Vec& x, U y) { return (x = x ^ Vec(y)); } +SINTU Vec& operator&=(Vec& x, U y) { return (x = x & Vec(y)); } +SINTU Vec& operator|=(Vec& x, U y) { return (x = x | Vec(y)); } + +SINT Vec& operator<<=(Vec& x, int bits) { return (x = x << bits); } +SINT Vec& operator>>=(Vec& x, int bits) { return (x = x >> bits); } + +// Some operations we want are not expressible with Clang/GCC vector extensions. + +// Clang can reason about naive_if_then_else() and optimize through it better +// than if_then_else(), so it's sometimes useful to call it directly when we +// think an entire expression should optimize away, e.g. min()/max(). +SINT Vec naive_if_then_else(const Vec>& cond, const Vec& t, const Vec& e) { + return bit_pun>(( cond & bit_pun>>(t)) | + (~cond & bit_pun>>(e)) ); +} + +SIT Vec<1,T> if_then_else(const Vec<1,M>& cond, const Vec<1,T>& t, const Vec<1,T>& e) { + // In practice this scalar implementation is unlikely to be used. See next if_then_else(). + return bit_pun>(( cond & bit_pun>>(t)) | + (~cond & bit_pun>>(e)) ); +} +SINT Vec if_then_else(const Vec>& cond, const Vec& t, const Vec& e) { + // Specializations inline here so they can generalize what types the apply to. +#if SKVX_USE_SIMD && defined(__AVX2__) + if constexpr (N*sizeof(T) == 32) { + return bit_pun>(_mm256_blendv_epi8(bit_pun<__m256i>(e), + bit_pun<__m256i>(t), + bit_pun<__m256i>(cond))); + } +#endif +#if SKVX_USE_SIMD && defined(__SSE4_1__) + if constexpr (N*sizeof(T) == 16) { + return bit_pun>(_mm_blendv_epi8(bit_pun<__m128i>(e), + bit_pun<__m128i>(t), + bit_pun<__m128i>(cond))); + } +#endif +#if SKVX_USE_SIMD && defined(__ARM_NEON) + if constexpr (N*sizeof(T) == 16) { + return bit_pun>(vbslq_u8(bit_pun(cond), + bit_pun(t), + bit_pun(e))); + } +#endif + // Recurse for large vectors to try to hit the specializations above. + if constexpr (N*sizeof(T) > 16) { + return join(if_then_else(cond.lo, t.lo, e.lo), + if_then_else(cond.hi, t.hi, e.hi)); + } + // This default can lead to better code than the recursing onto scalars. + return naive_if_then_else(cond, t, e); +} + +SIT bool any(const Vec<1,T>& x) { return x.val != 0; } +SINT bool any(const Vec& x) { + // For any(), the _mm_testz intrinsics are correct and don't require comparing 'x' to 0, so it's + // lower latency compared to _mm_movemask + _mm_compneq on plain SSE. +#if SKVX_USE_SIMD && defined(__AVX2__) + if constexpr (N*sizeof(T) == 32) { + return !_mm256_testz_si256(bit_pun<__m256i>(x), _mm256_set1_epi32(-1)); + } +#endif +#if SKVX_USE_SIMD && defined(__SSE_4_1__) + if constexpr (N*sizeof(T) == 16) { + return !_mm_testz_si128(bit_pun<__m128i>(x), _mm_set1_epi32(-1)); + } +#endif +#if SKVX_USE_SIMD && defined(__SSE__) + if constexpr (N*sizeof(T) == 16) { + // On SSE, movemask checks only the MSB in each lane, which is fine if the lanes were set + // directly from a comparison op (which sets all bits to 1 when true), but skvx::Vec<> + // treats any non-zero value as true, so we have to compare 'x' to 0 before calling movemask + return _mm_movemask_ps(_mm_cmpneq_ps(bit_pun<__m128>(x), _mm_set1_ps(0))) != 0b0000; + } +#endif +#if SKVX_USE_SIMD && defined(__aarch64__) + // On 64-bit NEON, take the max across lanes, which will be non-zero if any lane was true. + // The specific lane-size doesn't really matter in this case since it's really any set bit + // that we're looking for. + if constexpr (N*sizeof(T) == 8 ) { return vmaxv_u8 (bit_pun (x)) > 0; } + if constexpr (N*sizeof(T) == 16) { return vmaxvq_u8(bit_pun(x)) > 0; } +#endif +#if SKVX_USE_SIMD && defined(__wasm_simd128__) + if constexpr (N == 4 && sizeof(T) == 4) { + return wasm_i32x4_any_true(bit_pun>(x)); + } +#endif + return any(x.lo) + || any(x.hi); +} + +SIT bool all(const Vec<1,T>& x) { return x.val != 0; } +SINT bool all(const Vec& x) { +// Unlike any(), we have to respect the lane layout, or we'll miss cases where a +// true lane has a mix of 0 and 1 bits. +#if SKVX_USE_SIMD && defined(__SSE__) + // Unfortunately, the _mm_testc intrinsics don't let us avoid the comparison to 0 for all()'s + // correctness, so always just use the plain SSE version. + if constexpr (N == 4 && sizeof(T) == 4) { + return _mm_movemask_ps(_mm_cmpneq_ps(bit_pun<__m128>(x), _mm_set1_ps(0))) == 0b1111; + } +#endif +#if SKVX_USE_SIMD && defined(__aarch64__) + // On 64-bit NEON, take the min across the lanes, which will be non-zero if all lanes are != 0. + if constexpr (sizeof(T)==1 && N==8) {return vminv_u8 (bit_pun (x)) > 0;} + if constexpr (sizeof(T)==1 && N==16) {return vminvq_u8 (bit_pun(x)) > 0;} + if constexpr (sizeof(T)==2 && N==4) {return vminv_u16 (bit_pun(x)) > 0;} + if constexpr (sizeof(T)==2 && N==8) {return vminvq_u16(bit_pun(x)) > 0;} + if constexpr (sizeof(T)==4 && N==2) {return vminv_u32 (bit_pun(x)) > 0;} + if constexpr (sizeof(T)==4 && N==4) {return vminvq_u32(bit_pun(x)) > 0;} +#endif +#if SKVX_USE_SIMD && defined(__wasm_simd128__) + if constexpr (N == 4 && sizeof(T) == 4) { + return wasm_i32x4_all_true(bit_pun>(x)); + } +#endif + return all(x.lo) + && all(x.hi); +} + +// cast() Vec to Vec, as if applying a C-cast to each lane. +// TODO: implement with map()? +template +SI Vec<1,D> cast(const Vec<1,S>& src) { return (D)src.val; } + +template +SI Vec cast(const Vec& src) { +#if SKVX_USE_SIMD && defined(__clang__) + return to_vec(__builtin_convertvector(to_vext(src), VExt)); +#else + return join(cast(src.lo), cast(src.hi)); +#endif +} + +// min/max match logic of std::min/std::max, which is important when NaN is involved. +SIT T min(const Vec<1,T>& x) { return x.val; } +SIT T max(const Vec<1,T>& x) { return x.val; } +SINT T min(const Vec& x) { return std::min(min(x.lo), min(x.hi)); } +SINT T max(const Vec& x) { return std::max(max(x.lo), max(x.hi)); } + +SINT Vec min(const Vec& x, const Vec& y) { return naive_if_then_else(y < x, y, x); } +SINT Vec max(const Vec& x, const Vec& y) { return naive_if_then_else(x < y, y, x); } + +SINTU Vec min(const Vec& x, U y) { return min(x, Vec(y)); } +SINTU Vec max(const Vec& x, U y) { return max(x, Vec(y)); } +SINTU Vec min(U x, const Vec& y) { return min(Vec(x), y); } +SINTU Vec max(U x, const Vec& y) { return max(Vec(x), y); } + +// pin matches the logic of SkTPin, which is important when NaN is involved. It always returns +// values in the range lo..hi, and if x is NaN, it returns lo. +SINT Vec pin(const Vec& x, const Vec& lo, const Vec& hi) { + return max(lo, min(x, hi)); +} + +// Shuffle values from a vector pretty arbitrarily: +// skvx::Vec<4,float> rgba = {R,G,B,A}; +// shuffle<2,1,0,3> (rgba) ~> {B,G,R,A} +// shuffle<2,1> (rgba) ~> {B,G} +// shuffle<2,1,2,1,2,1,2,1>(rgba) ~> {B,G,B,G,B,G,B,G} +// shuffle<3,3,3,3> (rgba) ~> {A,A,A,A} +// The only real restriction is that the output also be a legal N=power-of-two sknx::Vec. +template +SI Vec shuffle(const Vec& x) { +#if SKVX_USE_SIMD && defined(__clang__) + // TODO: can we just always use { x[Ix]... }? + return to_vec(__builtin_shufflevector(to_vext(x), to_vext(x), Ix...)); +#else + return { x[Ix]... }; +#endif +} + +// Call map(fn, x) for a vector with fn() applied to each lane of x, { fn(x[0]), fn(x[1]), ... }, +// or map(fn, x,y) for a vector of fn(x[i], y[i]), etc. + +template +SI auto map(std::index_sequence, + Fn&& fn, const Args&... args) -> skvx::Vec { + auto lane = [&](size_t i) +#if defined(__clang__) + // CFI, specifically -fsanitize=cfi-icall, seems to give a false positive here, + // with errors like "control flow integrity check for type 'float (float) + // noexcept' failed during indirect function call... note: sqrtf.cfi_jt defined + // here". But we can be quite sure fn is the right type: it's all inferred! + // So, stifle CFI in this function. + __attribute__((no_sanitize("cfi"))) +#endif + { return fn(args[static_cast(i)]...); }; + + return { lane(I)... }; +} + +template +auto map(Fn&& fn, const Vec& first, const Rest&... rest) { + // Derive an {0...N-1} index_sequence from the size of the first arg: N lanes in, N lanes out. + return map(std::make_index_sequence{}, fn, first,rest...); +} + +SIN Vec ceil(const Vec& x) { return map( ceilf, x); } +SIN Vec floor(const Vec& x) { return map(floorf, x); } +SIN Vec trunc(const Vec& x) { return map(truncf, x); } +SIN Vec round(const Vec& x) { return map(roundf, x); } +SIN Vec sqrt(const Vec& x) { return map( sqrtf, x); } +SIN Vec abs(const Vec& x) { return map( fabsf, x); } +SIN Vec fma(const Vec& x, + const Vec& y, + const Vec& z) { + // I don't understand why Clang's codegen is terrible if we write map(fmaf, x,y,z) directly. + auto fn = [](float x, float y, float z) { return fmaf(x,y,z); }; + return map(fn, x,y,z); +} + +SI Vec<1,int> lrint(const Vec<1,float>& x) { + return (int)lrintf(x.val); +} +SIN Vec lrint(const Vec& x) { +#if SKVX_USE_SIMD && defined(__AVX__) + if constexpr (N == 8) { + return bit_pun>(_mm256_cvtps_epi32(bit_pun<__m256>(x))); + } +#endif +#if SKVX_USE_SIMD && defined(__SSE__) + if constexpr (N == 4) { + return bit_pun>(_mm_cvtps_epi32(bit_pun<__m128>(x))); + } +#endif + return join(lrint(x.lo), + lrint(x.hi)); +} + +SIN Vec fract(const Vec& x) { return x - floor(x); } + +// Assumes inputs are finite and treat/flush denorm half floats as/to zero. +// Key constants to watch for: +// - a float is 32-bit, 1-8-23 sign-exponent-mantissa, with 127 exponent bias; +// - a half is 16-bit, 1-5-10 sign-exponent-mantissa, with 15 exponent bias. +SIN Vec to_half_finite_ftz(const Vec& x) { + Vec sem = bit_pun>(x), + s = sem & 0x8000'0000, + em = sem ^ s, + is_norm = em > 0x387f'd000, // halfway between largest f16 denorm and smallest norm + norm = (em>>13) - ((127-15)<<10); + return cast((s>>16) | (is_norm & norm)); +} +SIN Vec from_half_finite_ftz(const Vec& x) { + Vec wide = cast(x), + s = wide & 0x8000, + em = wide ^ s, + is_norm = em > 0x3ff, + norm = (em<<13) + ((127-15)<<23); + return bit_pun>((s<<16) | (is_norm & norm)); +} + +// Like if_then_else(), these N=1 base cases won't actually be used unless explicitly called. +SI Vec<1,uint16_t> to_half(const Vec<1,float>& x) { return to_half_finite_ftz(x); } +SI Vec<1,float> from_half(const Vec<1,uint16_t>& x) { return from_half_finite_ftz(x); } + +SIN Vec to_half(const Vec& x) { +#if SKVX_USE_SIMD && defined(__F16C__) + if constexpr (N == 8) { + return bit_pun>(_mm256_cvtps_ph(bit_pun<__m256>(x), + _MM_FROUND_TO_NEAREST_INT)); + } +#endif +#if SKVX_USE_SIMD && defined(__aarch64__) + if constexpr (N == 4) { + return bit_pun>(vcvt_f16_f32(bit_pun(x))); + + } +#endif + if constexpr (N > 4) { + return join(to_half(x.lo), + to_half(x.hi)); + } + return to_half_finite_ftz(x); +} + +SIN Vec from_half(const Vec& x) { +#if SKVX_USE_SIMD && defined(__F16C__) + if constexpr (N == 8) { + return bit_pun>(_mm256_cvtph_ps(bit_pun<__m128i>(x))); + } +#endif +#if SKVX_USE_SIMD && defined(__aarch64__) + if constexpr (N == 4) { + return bit_pun>(vcvt_f32_f16(bit_pun(x))); + } +#endif + if constexpr (N > 4) { + return join(from_half(x.lo), + from_half(x.hi)); + } + return from_half_finite_ftz(x); +} + +// div255(x) = (x + 127) / 255 is a bit-exact rounding divide-by-255, packing down to 8-bit. +SIN Vec div255(const Vec& x) { + return cast( (x+127)/255 ); +} + +// approx_scale(x,y) approximates div255(cast(x)*cast(y)) within a bit, +// and is always perfect when x or y is 0 or 255. +SIN Vec approx_scale(const Vec& x, const Vec& y) { + // All of (x*y+x)/256, (x*y+y)/256, and (x*y+255)/256 meet the criteria above. + // We happen to have historically picked (x*y+x)/256. + auto X = cast(x), + Y = cast(y); + return cast( (X*Y+X)/256 ); +} + +// saturated_add(x,y) sums values and clamps to the maximum value instead of overflowing. +SINT std::enable_if_t, Vec> saturated_add(const Vec& x, + const Vec& y) { +#if SKVX_USE_SIMD && (defined(__SSE__) || defined(__ARM_NEON)) + // Both SSE and ARM have 16-lane saturated adds, so use intrinsics for those and recurse down + // or join up to take advantage. + if constexpr (N == 16 && sizeof(T) == 1) { + #if defined(__SSE__) + return bit_pun>(_mm_adds_epu8(bit_pun<__m128i>(x), bit_pun<__m128i>(y))); + #else // __ARM_NEON + return bit_pun>(vqaddq_u8(bit_pun(x), bit_pun(y))); + #endif + } else if constexpr (N < 16 && sizeof(T) == 1) { + return saturated_add(join(x,x), join(y,y)).lo; + } else if constexpr (sizeof(T) == 1) { + return join(saturated_add(x.lo, y.lo), saturated_add(x.hi, y.hi)); + } +#endif + // Otherwise saturate manually + auto sum = x + y; + return if_then_else(sum < x, Vec(std::numeric_limits::max()), sum); +} + +// The ScaledDividerU32 takes a divisor > 1, and creates a function divide(numerator) that +// calculates a numerator / denominator. For this to be rounded properly, numerator should have +// half added in: +// divide(numerator + half) == floor(numerator/denominator + 1/2). +// +// This gives an answer within +/- 1 from the true value. +// +// Derivation of half: +// numerator/denominator + 1/2 = (numerator + half) / d +// numerator + denominator / 2 = numerator + half +// half = denominator / 2. +// +// Because half is divided by 2, that division must also be rounded. +// half == denominator / 2 = (denominator + 1) / 2. +// +// The divisorFactor is just a scaled value: +// divisorFactor = (1 / divisor) * 2 ^ 32. +// The maximum that can be divided and rounded is UINT_MAX - half. +class ScaledDividerU32 { +public: + explicit ScaledDividerU32(uint32_t divisor) + : fDivisorFactor{(uint32_t)(std::round((1.0 / divisor) * (1ull << 32)))} + , fHalf{(divisor + 1) >> 1} { + assert(divisor > 1); + } + + Vec<4, uint32_t> divide(const Vec<4, uint32_t>& numerator) const { +#if SKVX_USE_SIMD && defined(__ARM_NEON) + uint64x2_t hi = vmull_n_u32(vget_high_u32(to_vext(numerator)), fDivisorFactor); + uint64x2_t lo = vmull_n_u32(vget_low_u32(to_vext(numerator)), fDivisorFactor); + + return to_vec<4, uint32_t>(vcombine_u32(vshrn_n_u64(lo,32), vshrn_n_u64(hi,32))); +#else + return cast((cast(numerator) * fDivisorFactor) >> 32); +#endif + } + + uint32_t half() const { return fHalf; } + +private: + const uint32_t fDivisorFactor; + const uint32_t fHalf; +}; + + +SIN Vec mull(const Vec& x, + const Vec& y) { +#if SKVX_USE_SIMD && defined(__ARM_NEON) + // With NEON we can do eight u8*u8 -> u16 in one instruction, vmull_u8 (read, mul-long). + if constexpr (N == 8) { + return to_vec<8,uint16_t>(vmull_u8(to_vext(x), to_vext(y))); + } else if constexpr (N < 8) { + return mull(join(x,x), join(y,y)).lo; + } else { // N > 8 + return join(mull(x.lo, y.lo), mull(x.hi, y.hi)); + } +#else + return cast(x) * cast(y); +#endif +} + +SIN Vec mull(const Vec& x, + const Vec& y) { +#if SKVX_USE_SIMD && defined(__ARM_NEON) + // NEON can do four u16*u16 -> u32 in one instruction, vmull_u16 + if constexpr (N == 4) { + return to_vec<4,uint32_t>(vmull_u16(to_vext(x), to_vext(y))); + } else if constexpr (N < 4) { + return mull(join(x,x), join(y,y)).lo; + } else { // N > 4 + return join(mull(x.lo, y.lo), mull(x.hi, y.hi)); + } +#else + return cast(x) * cast(y); +#endif +} + +SIN Vec mulhi(const Vec& x, + const Vec& y) { +#if SKVX_USE_SIMD && defined(__SSE__) + // Use _mm_mulhi_epu16 for 8xuint16_t and join or split to get there. + if constexpr (N == 8) { + return bit_pun>(_mm_mulhi_epu16(bit_pun<__m128i>(x), bit_pun<__m128i>(y))); + } else if constexpr (N < 8) { + return mulhi(join(x,x), join(y,y)).lo; + } else { // N > 8 + return join(mulhi(x.lo, y.lo), mulhi(x.hi, y.hi)); + } +#else + return skvx::cast(mull(x, y) >> 16); +#endif +} + +SINT T dot(const Vec& a, const Vec& b) { + // While dot is a "horizontal" operation like any or all, it needs to remain + // in floating point and there aren't really any good SIMD instructions that make it faster. + // The constexpr cases remove the for loop in the only cases we realistically call. + auto ab = a*b; + if constexpr (N == 2) { + return ab[0] + ab[1]; + } else if constexpr (N == 4) { + return ab[0] + ab[1] + ab[2] + ab[3]; + } else { + T sum = ab[0]; + for (int i = 1; i < N; ++i) { + sum += ab[i]; + } + return sum; + } +} + +SIT T cross(const Vec<2, T>& a, const Vec<2, T>& b) { + auto x = a * shuffle<1,0>(b); + return x[0] - x[1]; +} + +SIN float length(const Vec& v) { + return std::sqrt(dot(v, v)); +} + +SIN double length(const Vec& v) { + return std::sqrt(dot(v, v)); +} + +SIN Vec normalize(const Vec& v) { + return v / length(v); +} + +SIN Vec normalize(const Vec& v) { + return v / length(v); +} + +SINT bool isfinite(const Vec& v) { + // Multiply all values together with 0. If they were all finite, the output is + // 0 (also finite). If any were not, we'll get nan. + return std::isfinite(dot(v, Vec(0))); +} + +// De-interleaving load of 4 vectors. +// +// WARNING: These are really only supported well on NEON. Consider restructuring your data before +// resorting to these methods. +SIT void strided_load4(const T* v, + Vec<1,T>& a, + Vec<1,T>& b, + Vec<1,T>& c, + Vec<1,T>& d) { + a.val = v[0]; + b.val = v[1]; + c.val = v[2]; + d.val = v[3]; +} +SINT void strided_load4(const T* v, + Vec& a, + Vec& b, + Vec& c, + Vec& d) { + strided_load4(v, a.lo, b.lo, c.lo, d.lo); + strided_load4(v + 4*(N/2), a.hi, b.hi, c.hi, d.hi); +} +#if SKVX_USE_SIMD && defined(__ARM_NEON) +#define IMPL_LOAD4_TRANSPOSED(N, T, VLD) \ +SI void strided_load4(const T* v, \ + Vec& a, \ + Vec& b, \ + Vec& c, \ + Vec& d) { \ + auto mat = VLD(v); \ + a = bit_pun>(mat.val[0]); \ + b = bit_pun>(mat.val[1]); \ + c = bit_pun>(mat.val[2]); \ + d = bit_pun>(mat.val[3]); \ +} +IMPL_LOAD4_TRANSPOSED(2, uint32_t, vld4_u32) +IMPL_LOAD4_TRANSPOSED(4, uint16_t, vld4_u16) +IMPL_LOAD4_TRANSPOSED(8, uint8_t, vld4_u8) +IMPL_LOAD4_TRANSPOSED(2, int32_t, vld4_s32) +IMPL_LOAD4_TRANSPOSED(4, int16_t, vld4_s16) +IMPL_LOAD4_TRANSPOSED(8, int8_t, vld4_s8) +IMPL_LOAD4_TRANSPOSED(2, float, vld4_f32) +IMPL_LOAD4_TRANSPOSED(4, uint32_t, vld4q_u32) +IMPL_LOAD4_TRANSPOSED(8, uint16_t, vld4q_u16) +IMPL_LOAD4_TRANSPOSED(16, uint8_t, vld4q_u8) +IMPL_LOAD4_TRANSPOSED(4, int32_t, vld4q_s32) +IMPL_LOAD4_TRANSPOSED(8, int16_t, vld4q_s16) +IMPL_LOAD4_TRANSPOSED(16, int8_t, vld4q_s8) +IMPL_LOAD4_TRANSPOSED(4, float, vld4q_f32) +#undef IMPL_LOAD4_TRANSPOSED + +#elif SKVX_USE_SIMD && defined(__SSE__) + +SI void strided_load4(const float* v, + Vec<4,float>& a, + Vec<4,float>& b, + Vec<4,float>& c, + Vec<4,float>& d) { + __m128 a_ = _mm_loadu_ps(v); + __m128 b_ = _mm_loadu_ps(v+4); + __m128 c_ = _mm_loadu_ps(v+8); + __m128 d_ = _mm_loadu_ps(v+12); + _MM_TRANSPOSE4_PS(a_, b_, c_, d_); + a = bit_pun>(a_); + b = bit_pun>(b_); + c = bit_pun>(c_); + d = bit_pun>(d_); +} +#endif + +// De-interleaving load of 2 vectors. +// +// WARNING: These are really only supported well on NEON. Consider restructuring your data before +// resorting to these methods. +SIT void strided_load2(const T* v, Vec<1,T>& a, Vec<1,T>& b) { + a.val = v[0]; + b.val = v[1]; +} +SINT void strided_load2(const T* v, Vec& a, Vec& b) { + strided_load2(v, a.lo, b.lo); + strided_load2(v + 2*(N/2), a.hi, b.hi); +} +#if SKVX_USE_SIMD && defined(__ARM_NEON) +#define IMPL_LOAD2_TRANSPOSED(N, T, VLD) \ +SI void strided_load2(const T* v, Vec& a, Vec& b) { \ + auto mat = VLD(v); \ + a = bit_pun>(mat.val[0]); \ + b = bit_pun>(mat.val[1]); \ +} +IMPL_LOAD2_TRANSPOSED(2, uint32_t, vld2_u32) +IMPL_LOAD2_TRANSPOSED(4, uint16_t, vld2_u16) +IMPL_LOAD2_TRANSPOSED(8, uint8_t, vld2_u8) +IMPL_LOAD2_TRANSPOSED(2, int32_t, vld2_s32) +IMPL_LOAD2_TRANSPOSED(4, int16_t, vld2_s16) +IMPL_LOAD2_TRANSPOSED(8, int8_t, vld2_s8) +IMPL_LOAD2_TRANSPOSED(2, float, vld2_f32) +IMPL_LOAD2_TRANSPOSED(4, uint32_t, vld2q_u32) +IMPL_LOAD2_TRANSPOSED(8, uint16_t, vld2q_u16) +IMPL_LOAD2_TRANSPOSED(16, uint8_t, vld2q_u8) +IMPL_LOAD2_TRANSPOSED(4, int32_t, vld2q_s32) +IMPL_LOAD2_TRANSPOSED(8, int16_t, vld2q_s16) +IMPL_LOAD2_TRANSPOSED(16, int8_t, vld2q_s8) +IMPL_LOAD2_TRANSPOSED(4, float, vld2q_f32) +#undef IMPL_LOAD2_TRANSPOSED +#endif + +// Define commonly used aliases +using float2 = Vec< 2, float>; +using float4 = Vec< 4, float>; +using float8 = Vec< 8, float>; + +using double2 = Vec< 2, double>; +using double4 = Vec< 4, double>; +using double8 = Vec< 8, double>; + +using byte2 = Vec< 2, uint8_t>; +using byte4 = Vec< 4, uint8_t>; +using byte8 = Vec< 8, uint8_t>; +using byte16 = Vec<16, uint8_t>; + +using int2 = Vec< 2, int32_t>; +using int4 = Vec< 4, int32_t>; +using int8 = Vec< 8, int32_t>; + +using uint2 = Vec< 2, uint32_t>; +using uint4 = Vec< 4, uint32_t>; +using uint8 = Vec< 8, uint32_t>; + +using long2 = Vec< 2, int64_t>; +using long4 = Vec< 4, int64_t>; +using long8 = Vec< 8, int64_t>; + +// Use with from_half and to_half to convert between floatX, and use these for storage. +using half2 = Vec< 2, uint16_t>; +using half4 = Vec< 4, uint16_t>; +using half8 = Vec< 8, uint16_t>; + +} // namespace skvx + +#undef SINTU +#undef SINT +#undef SIN +#undef SIT +#undef SI +#undef SKVX_ALWAYS_INLINE +#undef SKVX_USE_SIMD + +#endif//SKVX_DEFINED diff --git a/gfx/skia/skia/src/base/SkZip.h b/gfx/skia/skia/src/base/SkZip.h new file mode 100644 index 0000000000..884aa11d8d --- /dev/null +++ b/gfx/skia/skia/src/base/SkZip.h @@ -0,0 +1,215 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkZip_DEFINED +#define SkZip_DEFINED + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkSpan_impl.h" + +#include +#include +#include +#include +#include +#include + +// Take a list of things that can be pointers, and use them all in parallel. The iterators and +// accessor operator[] for the class produce a tuple of the items. +template +class SkZip { + using ReturnTuple = std::tuple; + + class Iterator { + public: + using value_type = ReturnTuple; + using difference_type = ptrdiff_t; + using pointer = value_type*; + using reference = value_type; + using iterator_category = std::input_iterator_tag; + constexpr Iterator(const SkZip* zip, size_t index) : fZip{zip}, fIndex{index} { } + constexpr Iterator(const Iterator& that) : Iterator{ that.fZip, that.fIndex } { } + constexpr Iterator& operator++() { ++fIndex; return *this; } + constexpr Iterator operator++(int) { Iterator tmp(*this); operator++(); return tmp; } + constexpr bool operator==(const Iterator& rhs) const { return fIndex == rhs.fIndex; } + constexpr bool operator!=(const Iterator& rhs) const { return fIndex != rhs.fIndex; } + constexpr reference operator*() { return (*fZip)[fIndex]; } + friend constexpr difference_type operator-(Iterator lhs, Iterator rhs) { + return lhs.fIndex - rhs.fIndex; + } + + private: + const SkZip* const fZip = nullptr; + size_t fIndex = 0; + }; + + template + inline static constexpr T* nullify = nullptr; + +public: + constexpr SkZip() : fPointers{nullify...}, fSize{0} {} + constexpr SkZip(size_t) = delete; + constexpr SkZip(size_t size, Ts*... ts) + : fPointers{ts...} + , fSize{size} {} + constexpr SkZip(const SkZip& that) = default; + constexpr SkZip& operator=(const SkZip &that) = default; + + // Check to see if U can be used for const T or is the same as T + template + using CanConvertToConst = typename std::integral_constant::value && sizeof(U) == sizeof(T)>::type; + + // Allow SkZip to be constructed from SkZip. + template...>::value>> + constexpr SkZip(const SkZip& that) + : fPointers(that.data()) + , fSize{that.size()} { } + + constexpr ReturnTuple operator[](size_t i) const { return this->index(i);} + constexpr size_t size() const { return fSize; } + constexpr bool empty() const { return this->size() == 0; } + constexpr ReturnTuple front() const { return this->index(0); } + constexpr ReturnTuple back() const { return this->index(this->size() - 1); } + constexpr Iterator begin() const { return Iterator{this, 0}; } + constexpr Iterator end() const { return Iterator{this, this->size()}; } + template constexpr auto get() const { + return SkSpan(std::get(fPointers), fSize); + } + constexpr std::tuple data() const { return fPointers; } + constexpr SkZip first(size_t n) const { + SkASSERT(n <= this->size()); + if (n == 0) { return SkZip(); } + return SkZip{n, fPointers}; + } + constexpr SkZip last(size_t n) const { + SkASSERT(n <= this->size()); + if (n == 0) { return SkZip(); } + return SkZip{n, this->pointersAt(fSize - n)}; + } + constexpr SkZip subspan(size_t offset, size_t count) const { + SkASSERT(offset < this->size()); + SkASSERT(count <= this->size() - offset); + if (count == 0) { return SkZip(); } + return SkZip(count, pointersAt(offset)); + } + +private: + constexpr SkZip(size_t n, const std::tuple& pointers) + : fPointers{pointers} + , fSize{n} {} + + constexpr ReturnTuple index(size_t i) const { + SkASSERT(this->size() > 0); + SkASSERT(i < this->size()); + return indexDetail(i, std::make_index_sequence{}); + } + + template + constexpr ReturnTuple indexDetail(size_t i, std::index_sequence) const { + return ReturnTuple((std::get(fPointers))[i]...); + } + + std::tuple pointersAt(size_t i) const { + SkASSERT(this->size() > 0); + SkASSERT(i < this->size()); + return pointersAtDetail(i, std::make_index_sequence{}); + } + + template + constexpr std::tuple pointersAtDetail(size_t i, std::index_sequence) const { + return std::tuple{&(std::get(fPointers))[i]...}; + } + + std::tuple fPointers; + size_t fSize; +}; + +class SkMakeZipDetail { + template struct DecayPointer{ + using U = typename std::remove_cv::type>::type; + using type = typename std::conditional::value, U, T>::type; + }; + template using DecayPointerT = typename DecayPointer::type; + + template struct ContiguousMemory { }; + template struct ContiguousMemory { + using value_type = T; + static constexpr value_type* Data(T* t) { return t; } + static constexpr size_t Size(T* s) { return SIZE_MAX; } + }; + template struct ContiguousMemory { + using value_type = T; + static constexpr value_type* Data(T(&t)[N]) { return t; } + static constexpr size_t Size(T(&)[N]) { return N; } + }; + // In general, we don't want r-value collections, but SkSpans are ok, because they are a view + // onto an actual container. + template struct ContiguousMemory> { + using value_type = T; + static constexpr value_type* Data(SkSpan s) { return s.data(); } + static constexpr size_t Size(SkSpan s) { return s.size(); } + }; + // Only accept l-value references to collections. + template struct ContiguousMemory { + using value_type = typename std::remove_pointer().data())>::type; + static constexpr value_type* Data(C& c) { return c.data(); } + static constexpr size_t Size(C& c) { return c.size(); } + }; + template using Span = ContiguousMemory>; + template using ValueType = typename Span::value_type; + + template struct PickOneSize { }; + template struct PickOneSize { + static constexpr size_t Size(T* t, Ts... ts) { + return PickOneSize::Size(std::forward(ts)...); + } + }; + template struct PickOneSize { + static constexpr size_t Size(T(&)[N], Ts...) { return N; } + }; + template struct PickOneSize, Ts...> { + static constexpr size_t Size(SkSpan s, Ts...) { return s.size(); } + }; + template struct PickOneSize { + static constexpr size_t Size(C& c, Ts...) { return c.size(); } + }; + +public: + template + static constexpr auto MakeZip(Ts&& ... ts) { + + // Pick the first collection that has a size, and use that for the size. + size_t size = PickOneSize...>::Size(std::forward(ts)...); + +#ifdef SK_DEBUG + // Check that all sizes are the same. + size_t minSize = SIZE_MAX; + size_t maxSize = 0; + for (size_t s : {Span::Size(std::forward(ts))...}) { + if (s != SIZE_MAX) { + minSize = std::min(minSize, s); + maxSize = std::max(maxSize, s); + } + } + SkASSERT(minSize == maxSize); +#endif + + return SkZip...>{size, Span::Data(std::forward(ts))...}; + } +}; + +template +SkZip(size_t size, Ts*... ts) -> SkZip; + +template +inline constexpr auto SkMakeZip(Ts&& ... ts) { + return SkMakeZipDetail::MakeZip(std::forward(ts)...); +} +#endif //SkZip_DEFINED diff --git a/gfx/skia/skia/src/codec/SkCodec.cpp b/gfx/skia/skia/src/codec/SkCodec.cpp new file mode 100644 index 0000000000..d49857a130 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkCodec.cpp @@ -0,0 +1,972 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/codec/SkCodec.h" + +#include "include/codec/SkCodecAnimation.h" +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorPriv.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkImage.h" // IWYU pragma: keep +#include "include/core/SkMatrix.h" +#include "include/core/SkStream.h" +#include "include/private/base/SkTemplates.h" +#include "modules/skcms/skcms.h" +#include "src/codec/SkCodecPriv.h" +#include "src/codec/SkFrameHolder.h" +#include "src/codec/SkSampler.h" + +// We always include and compile in these BMP codecs +#include "src/codec/SkBmpCodec.h" +#include "src/codec/SkWbmpCodec.h" + +#include + +#ifdef SK_CODEC_DECODES_AVIF +#include "src/codec/SkAvifCodec.h" +#endif + +#ifdef SK_HAS_HEIF_LIBRARY +#include "src/codec/SkHeifCodec.h" +#endif + +#ifdef SK_CODEC_DECODES_JPEG +#include "src/codec/SkJpegCodec.h" +#endif + +#ifdef SK_CODEC_DECODES_JPEGXL +#include "src/codec/SkJpegxlCodec.h" +#endif + +#ifdef SK_CODEC_DECODES_PNG +#include "src/codec/SkIcoCodec.h" +#include "src/codec/SkPngCodec.h" +#endif + +#ifdef SK_CODEC_DECODES_RAW +#include "src/codec/SkRawCodec.h" +#endif + +#ifdef SK_CODEC_DECODES_WEBP +#include "src/codec/SkWebpCodec.h" +#endif + +#ifdef SK_HAS_WUFFS_LIBRARY +#include "src/codec/SkWuffsCodec.h" +#endif + +namespace { + +struct DecoderProc { + bool (*IsFormat)(const void*, size_t); + std::unique_ptr (*MakeFromStream)(std::unique_ptr, SkCodec::Result*); +}; + +std::vector* decoders() { + static auto* decoders = new std::vector { + #ifdef SK_CODEC_DECODES_JPEG + { SkJpegCodec::IsJpeg, SkJpegCodec::MakeFromStream }, + #endif + #ifdef SK_CODEC_DECODES_WEBP + { SkWebpCodec::IsWebp, SkWebpCodec::MakeFromStream }, + #endif + #ifdef SK_HAS_WUFFS_LIBRARY + { SkWuffsCodec_IsFormat, SkWuffsCodec_MakeFromStream }, + #endif + #ifdef SK_CODEC_DECODES_PNG + { SkIcoCodec::IsIco, SkIcoCodec::MakeFromStream }, + #endif + { SkBmpCodec::IsBmp, SkBmpCodec::MakeFromStream }, + { SkWbmpCodec::IsWbmp, SkWbmpCodec::MakeFromStream }, + #ifdef SK_CODEC_DECODES_AVIF + { SkAvifCodec::IsAvif, SkAvifCodec::MakeFromStream }, + #endif + #ifdef SK_CODEC_DECODES_JPEGXL + { SkJpegxlCodec::IsJpegxl, SkJpegxlCodec::MakeFromStream }, + #endif + }; + return decoders; +} + +} // namespace + +void SkCodec::Register( + bool (*peek)(const void*, size_t), + std::unique_ptr (*make)(std::unique_ptr, SkCodec::Result*)) { + decoders()->push_back(DecoderProc{peek, make}); +} + +std::unique_ptr SkCodec::MakeFromStream( + std::unique_ptr stream, Result* outResult, + SkPngChunkReader* chunkReader, SelectionPolicy selectionPolicy) { + Result resultStorage; + if (!outResult) { + outResult = &resultStorage; + } + + if (!stream) { + *outResult = kInvalidInput; + return nullptr; + } + + if (selectionPolicy != SelectionPolicy::kPreferStillImage + && selectionPolicy != SelectionPolicy::kPreferAnimation) { + *outResult = kInvalidParameters; + return nullptr; + } + + constexpr size_t bytesToRead = MinBufferedBytesNeeded(); + + char buffer[bytesToRead]; + size_t bytesRead = stream->peek(buffer, bytesToRead); + + // It is also possible to have a complete image less than bytesToRead bytes + // (e.g. a 1 x 1 wbmp), meaning peek() would return less than bytesToRead. + // Assume that if bytesRead < bytesToRead, but > 0, the stream is shorter + // than bytesToRead, so pass that directly to the decoder. + // It also is possible the stream uses too small a buffer for peeking, but + // we trust the caller to use a large enough buffer. + + if (0 == bytesRead) { + // TODO: After implementing peek in CreateJavaOutputStreamAdaptor.cpp, this + // printf could be useful to notice failures. + // SkCodecPrintf("Encoded image data failed to peek!\n"); + + // It is possible the stream does not support peeking, but does support + // rewinding. + // Attempt to read() and pass the actual amount read to the decoder. + bytesRead = stream->read(buffer, bytesToRead); + if (!stream->rewind()) { + SkCodecPrintf("Encoded image data could not peek or rewind to determine format!\n"); + *outResult = kCouldNotRewind; + return nullptr; + } + } + + // PNG is special, since we want to be able to supply an SkPngChunkReader. + // But this code follows the same pattern as the loop. +#ifdef SK_CODEC_DECODES_PNG + if (SkPngCodec::IsPng(buffer, bytesRead)) { + return SkPngCodec::MakeFromStream(std::move(stream), outResult, chunkReader); + } +#endif + + for (DecoderProc proc : *decoders()) { + if (proc.IsFormat(buffer, bytesRead)) { + return proc.MakeFromStream(std::move(stream), outResult); + } + } + +#ifdef SK_HAS_HEIF_LIBRARY + SkEncodedImageFormat format; + if (SkHeifCodec::IsSupported(buffer, bytesRead, &format)) { + return SkHeifCodec::MakeFromStream(std::move(stream), selectionPolicy, + format, outResult); + } +#endif + +#ifdef SK_CODEC_DECODES_RAW + // Try to treat the input as RAW if all the other checks failed. + return SkRawCodec::MakeFromStream(std::move(stream), outResult); +#else + if (bytesRead < bytesToRead) { + *outResult = kIncompleteInput; + } else { + *outResult = kUnimplemented; + } + + return nullptr; +#endif +} + +std::unique_ptr SkCodec::MakeFromData(sk_sp data, SkPngChunkReader* reader) { + if (!data) { + return nullptr; + } + return MakeFromStream(SkMemoryStream::Make(std::move(data)), nullptr, reader); +} + +SkCodec::SkCodec(SkEncodedInfo&& info, + XformFormat srcFormat, + std::unique_ptr stream, + SkEncodedOrigin origin) + : fEncodedInfo(std::move(info)) + , fSrcXformFormat(srcFormat) + , fStream(std::move(stream)) + , fOrigin(origin) + , fDstInfo() + , fOptions() {} + +SkCodec::~SkCodec() {} + +void SkCodec::setSrcXformFormat(XformFormat pixelFormat) { + fSrcXformFormat = pixelFormat; +} + +bool SkCodec::queryYUVAInfo(const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes, + SkYUVAPixmapInfo* yuvaPixmapInfo) const { + if (!yuvaPixmapInfo) { + return false; + } + return this->onQueryYUVAInfo(supportedDataTypes, yuvaPixmapInfo) && + yuvaPixmapInfo->isSupported(supportedDataTypes); +} + +SkCodec::Result SkCodec::getYUVAPlanes(const SkYUVAPixmaps& yuvaPixmaps) { + if (!yuvaPixmaps.isValid()) { + return kInvalidInput; + } + if (!this->rewindIfNeeded()) { + return kCouldNotRewind; + } + return this->onGetYUVAPlanes(yuvaPixmaps); +} + +bool SkCodec::conversionSupported(const SkImageInfo& dst, bool srcIsOpaque, bool needsColorXform) { + if (!valid_alpha(dst.alphaType(), srcIsOpaque)) { + return false; + } + + switch (dst.colorType()) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + case kRGBA_F16_SkColorType: + return true; + case kBGR_101010x_XR_SkColorType: + case kRGB_565_SkColorType: + return srcIsOpaque; + case kGray_8_SkColorType: + return SkEncodedInfo::kGray_Color == fEncodedInfo.color() && srcIsOpaque; + case kAlpha_8_SkColorType: + // conceptually we can convert anything into alpha_8, but we haven't actually coded + // all of those other conversions yet. + return SkEncodedInfo::kXAlpha_Color == fEncodedInfo.color(); + default: + return false; + } +} + +bool SkCodec::rewindIfNeeded() { + // Store the value of fNeedsRewind so we can update it. Next read will + // require a rewind. + const bool needsRewind = fNeedsRewind; + fNeedsRewind = true; + if (!needsRewind) { + return true; + } + + // startScanlineDecode will need to be called before decoding scanlines. + fCurrScanline = -1; + // startIncrementalDecode will need to be called before incrementalDecode. + fStartedIncrementalDecode = false; + + // Some codecs do not have a stream. They may hold onto their own data or another codec. + // They must handle rewinding themselves. + if (fStream && !fStream->rewind()) { + return false; + } + + return this->onRewind(); +} + +static SkIRect frame_rect_on_screen(SkIRect frameRect, + const SkIRect& screenRect) { + if (!frameRect.intersect(screenRect)) { + return SkIRect::MakeEmpty(); + } + + return frameRect; +} + +bool zero_rect(const SkImageInfo& dstInfo, void* pixels, size_t rowBytes, + SkISize srcDimensions, SkIRect prevRect) { + const auto dimensions = dstInfo.dimensions(); + if (dimensions != srcDimensions) { + SkRect src = SkRect::Make(srcDimensions); + SkRect dst = SkRect::Make(dimensions); + SkMatrix map = SkMatrix::RectToRect(src, dst); + SkRect asRect = SkRect::Make(prevRect); + if (!map.mapRect(&asRect)) { + return false; + } + asRect.roundOut(&prevRect); + } + + if (!prevRect.intersect(SkIRect::MakeSize(dimensions))) { + // Nothing to zero, due to scaling or bad frame rect. + return true; + } + + const SkImageInfo info = dstInfo.makeDimensions(prevRect.size()); + const size_t bpp = dstInfo.bytesPerPixel(); + const size_t offset = prevRect.x() * bpp + prevRect.y() * rowBytes; + void* eraseDst = SkTAddOffset(pixels, offset); + SkSampler::Fill(info, eraseDst, rowBytes, SkCodec::kNo_ZeroInitialized); + return true; +} + +SkCodec::Result SkCodec::handleFrameIndex(const SkImageInfo& info, void* pixels, size_t rowBytes, + const Options& options, GetPixelsCallback getPixelsFn) { + if (getPixelsFn) { + // If a callback is used, it handles the frame index, so calls from this SkCodec + // should always short-circuit in the else case below. + fUsingCallbackForHandleFrameIndex = true; + } else if (fUsingCallbackForHandleFrameIndex) { + return kSuccess; + } + + if (!this->rewindIfNeeded()) { + return kCouldNotRewind; + } + + const int index = options.fFrameIndex; + if (0 == index) { + return this->initializeColorXform(info, fEncodedInfo.alpha(), fEncodedInfo.opaque()) + ? kSuccess : kInvalidConversion; + } + + if (index < 0) { + return kInvalidParameters; + } + + if (options.fSubset) { + // If we add support for this, we need to update the code that zeroes + // a kRestoreBGColor frame. + return kInvalidParameters; + } + + if (index >= this->onGetFrameCount()) { + return kIncompleteInput; + } + + const auto* frameHolder = this->getFrameHolder(); + SkASSERT(frameHolder); + + const auto* frame = frameHolder->getFrame(index); + SkASSERT(frame); + + const int requiredFrame = frame->getRequiredFrame(); + if (requiredFrame != kNoFrame) { + // Decode earlier frame if necessary + const SkFrame* preppedFrame = nullptr; + if (options.fPriorFrame == kNoFrame) { + Result result = kInternalError; + // getPixelsFn will be set when things like SkAndroidCodec are calling this function. + // Thus, we call the provided function when recursively decoding previous frames, + // but only when necessary (i.e. there is a required frame). + if (getPixelsFn) { + result = getPixelsFn(info, pixels, rowBytes, options, requiredFrame); + } else { + Options prevFrameOptions(options); + prevFrameOptions.fFrameIndex = requiredFrame; + result = this->getPixels(info, pixels, rowBytes, &prevFrameOptions); + } + if (result != kSuccess) { + return result; + } + preppedFrame = frameHolder->getFrame(requiredFrame); + } else { + // Check for a valid frame as a starting point. Alternatively, we could + // treat an invalid frame as not providing one, but rejecting it will + // make it easier to catch the mistake. + if (options.fPriorFrame < requiredFrame || options.fPriorFrame >= index) { + return kInvalidParameters; + } + preppedFrame = frameHolder->getFrame(options.fPriorFrame); + } + + SkASSERT(preppedFrame); + switch (preppedFrame->getDisposalMethod()) { + case SkCodecAnimation::DisposalMethod::kRestorePrevious: + SkASSERT(options.fPriorFrame != kNoFrame); + return kInvalidParameters; + case SkCodecAnimation::DisposalMethod::kRestoreBGColor: + // If a frame after the required frame is provided, there is no + // need to clear, since it must be covered by the desired frame. + // FIXME: If the required frame is kRestoreBGColor, we don't actually need to decode + // it, since we'll just clear it to transparent. Instead, we could decode *its* + // required frame and then clear. + if (preppedFrame->frameId() == requiredFrame) { + SkIRect preppedRect = preppedFrame->frameRect(); + if (!zero_rect(info, pixels, rowBytes, this->dimensions(), preppedRect)) { + return kInternalError; + } + } + break; + default: + break; + } + } + + return this->initializeColorXform(info, frame->reportedAlpha(), !frame->hasAlpha()) + ? kSuccess : kInvalidConversion; +} + +SkCodec::Result SkCodec::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + const Options* options) { + if (kUnknown_SkColorType == info.colorType()) { + return kInvalidConversion; + } + if (nullptr == pixels) { + return kInvalidParameters; + } + if (rowBytes < info.minRowBytes()) { + return kInvalidParameters; + } + + // Default options. + Options optsStorage; + if (nullptr == options) { + options = &optsStorage; + } else { + if (options->fSubset) { + SkIRect subset(*options->fSubset); + if (!this->onGetValidSubset(&subset) || subset != *options->fSubset) { + // FIXME: How to differentiate between not supporting subset at all + // and not supporting this particular subset? + return kUnimplemented; + } + } + } + + const Result frameIndexResult = this->handleFrameIndex(info, pixels, rowBytes, + *options); + if (frameIndexResult != kSuccess) { + return frameIndexResult; + } + + // FIXME: Support subsets somehow? Note that this works for SkWebpCodec + // because it supports arbitrary scaling/subset combinations. + if (!this->dimensionsSupported(info.dimensions())) { + return kInvalidScale; + } + + fDstInfo = info; + fOptions = *options; + + // On an incomplete decode, the subclass will specify the number of scanlines that it decoded + // successfully. + int rowsDecoded = 0; + const Result result = this->onGetPixels(info, pixels, rowBytes, *options, &rowsDecoded); + + // A return value of kIncompleteInput indicates a truncated image stream. + // In this case, we will fill any uninitialized memory with a default value. + // Some subclasses will take care of filling any uninitialized memory on + // their own. They indicate that all of the memory has been filled by + // setting rowsDecoded equal to the height. + if ((kIncompleteInput == result || kErrorInInput == result) && rowsDecoded != info.height()) { + // FIXME: (skbug.com/5772) fillIncompleteImage will fill using the swizzler's width, unless + // there is a subset. In that case, it will use the width of the subset. From here, the + // subset will only be non-null in the case of SkWebpCodec, but it treats the subset + // differenty from the other codecs, and it needs to use the width specified by the info. + // Set the subset to null so SkWebpCodec uses the correct width. + fOptions.fSubset = nullptr; + this->fillIncompleteImage(info, pixels, rowBytes, options->fZeroInitialized, info.height(), + rowsDecoded); + } + + return result; +} + +std::tuple, SkCodec::Result> SkCodec::getImage(const SkImageInfo& info, + const Options* options) { + SkBitmap bm; + if (!bm.tryAllocPixels(info)) { + return {nullptr, kInternalError}; + } + + Result result = this->getPixels(info, bm.getPixels(), bm.rowBytes(), options); + switch (result) { + case kSuccess: + case kIncompleteInput: + case kErrorInInput: + bm.setImmutable(); + return {bm.asImage(), result}; + + default: break; + } + return {nullptr, result}; +} + +std::tuple, SkCodec::Result> SkCodec::getImage() { + return this->getImage(this->getInfo(), nullptr); +} + +SkCodec::Result SkCodec::startIncrementalDecode(const SkImageInfo& info, void* pixels, + size_t rowBytes, const SkCodec::Options* options) { + fStartedIncrementalDecode = false; + + if (kUnknown_SkColorType == info.colorType()) { + return kInvalidConversion; + } + if (nullptr == pixels) { + return kInvalidParameters; + } + + // Set options. + Options optsStorage; + if (nullptr == options) { + options = &optsStorage; + } else { + if (options->fSubset) { + SkIRect size = SkIRect::MakeSize(info.dimensions()); + if (!size.contains(*options->fSubset)) { + return kInvalidParameters; + } + + const int top = options->fSubset->top(); + const int bottom = options->fSubset->bottom(); + if (top < 0 || top >= info.height() || top >= bottom || bottom > info.height()) { + return kInvalidParameters; + } + } + } + + const Result frameIndexResult = this->handleFrameIndex(info, pixels, rowBytes, + *options); + if (frameIndexResult != kSuccess) { + return frameIndexResult; + } + + if (!this->dimensionsSupported(info.dimensions())) { + return kInvalidScale; + } + + fDstInfo = info; + fOptions = *options; + + const Result result = this->onStartIncrementalDecode(info, pixels, rowBytes, fOptions); + if (kSuccess == result) { + fStartedIncrementalDecode = true; + } else if (kUnimplemented == result) { + // FIXME: This is temporarily necessary, until we transition SkCodec + // implementations from scanline decoding to incremental decoding. + // SkAndroidCodec will first attempt to use incremental decoding, but + // will fall back to scanline decoding if incremental returns + // kUnimplemented. rewindIfNeeded(), above, set fNeedsRewind to true + // (after potentially rewinding), but we do not want the next call to + // startScanlineDecode() to do a rewind. + fNeedsRewind = false; + } + return result; +} + + +SkCodec::Result SkCodec::startScanlineDecode(const SkImageInfo& info, + const SkCodec::Options* options) { + // Reset fCurrScanline in case of failure. + fCurrScanline = -1; + + // Set options. + Options optsStorage; + if (nullptr == options) { + options = &optsStorage; + } else if (options->fSubset) { + SkIRect size = SkIRect::MakeSize(info.dimensions()); + if (!size.contains(*options->fSubset)) { + return kInvalidInput; + } + + // We only support subsetting in the x-dimension for scanline decoder. + // Subsetting in the y-dimension can be accomplished using skipScanlines(). + if (options->fSubset->top() != 0 || options->fSubset->height() != info.height()) { + return kInvalidInput; + } + } + + // Scanline decoding only supports decoding the first frame. + if (options->fFrameIndex != 0) { + return kUnimplemented; + } + + // The void* dst and rowbytes in handleFrameIndex or only used for decoding prior + // frames, which is not supported here anyway, so it is safe to pass nullptr/0. + const Result frameIndexResult = this->handleFrameIndex(info, nullptr, 0, *options); + if (frameIndexResult != kSuccess) { + return frameIndexResult; + } + + // FIXME: Support subsets somehow? + if (!this->dimensionsSupported(info.dimensions())) { + return kInvalidScale; + } + + const Result result = this->onStartScanlineDecode(info, *options); + if (result != SkCodec::kSuccess) { + return result; + } + + // FIXME: See startIncrementalDecode. That method set fNeedsRewind to false + // so that when onStartScanlineDecode calls rewindIfNeeded it would not + // rewind. But it also relies on that call to rewindIfNeeded to set + // fNeedsRewind to true for future decodes. When + // fUsingCallbackForHandleFrameIndex is true, that call to rewindIfNeeded is + // skipped, so this method sets it back to true. + SkASSERT(fUsingCallbackForHandleFrameIndex || fNeedsRewind); + fNeedsRewind = true; + + fCurrScanline = 0; + fDstInfo = info; + fOptions = *options; + return kSuccess; +} + +int SkCodec::getScanlines(void* dst, int countLines, size_t rowBytes) { + if (fCurrScanline < 0) { + return 0; + } + + SkASSERT(!fDstInfo.isEmpty()); + if (countLines <= 0 || fCurrScanline + countLines > fDstInfo.height()) { + return 0; + } + + const int linesDecoded = this->onGetScanlines(dst, countLines, rowBytes); + if (linesDecoded < countLines) { + this->fillIncompleteImage(this->dstInfo(), dst, rowBytes, this->options().fZeroInitialized, + countLines, linesDecoded); + } + fCurrScanline += countLines; + return linesDecoded; +} + +bool SkCodec::skipScanlines(int countLines) { + if (fCurrScanline < 0) { + return false; + } + + SkASSERT(!fDstInfo.isEmpty()); + if (countLines < 0 || fCurrScanline + countLines > fDstInfo.height()) { + // Arguably, we could just skip the scanlines which are remaining, + // and return true. We choose to return false so the client + // can catch their bug. + return false; + } + + bool result = this->onSkipScanlines(countLines); + fCurrScanline += countLines; + return result; +} + +int SkCodec::outputScanline(int inputScanline) const { + SkASSERT(0 <= inputScanline && inputScanline < fEncodedInfo.height()); + return this->onOutputScanline(inputScanline); +} + +int SkCodec::onOutputScanline(int inputScanline) const { + switch (this->getScanlineOrder()) { + case kTopDown_SkScanlineOrder: + return inputScanline; + case kBottomUp_SkScanlineOrder: + return fEncodedInfo.height() - inputScanline - 1; + default: + // This case indicates an interlaced gif and is implemented by SkGifCodec. + SkASSERT(false); + return 0; + } +} + +void SkCodec::fillIncompleteImage(const SkImageInfo& info, void* dst, size_t rowBytes, + ZeroInitialized zeroInit, int linesRequested, int linesDecoded) { + if (kYes_ZeroInitialized == zeroInit) { + return; + } + + const int linesRemaining = linesRequested - linesDecoded; + SkSampler* sampler = this->getSampler(false); + + const int fillWidth = sampler ? sampler->fillWidth() : + fOptions.fSubset ? fOptions.fSubset->width() : + info.width() ; + void* fillDst = this->getScanlineOrder() == kBottomUp_SkScanlineOrder ? dst : + SkTAddOffset(dst, linesDecoded * rowBytes); + const auto fillInfo = info.makeWH(fillWidth, linesRemaining); + SkSampler::Fill(fillInfo, fillDst, rowBytes, kNo_ZeroInitialized); +} + +bool sk_select_xform_format(SkColorType colorType, bool forColorTable, + skcms_PixelFormat* outFormat) { + SkASSERT(outFormat); + + switch (colorType) { + case kRGBA_8888_SkColorType: + *outFormat = skcms_PixelFormat_RGBA_8888; + break; + case kBGRA_8888_SkColorType: + *outFormat = skcms_PixelFormat_BGRA_8888; + break; + case kRGB_565_SkColorType: + if (forColorTable) { +#ifdef SK_PMCOLOR_IS_RGBA + *outFormat = skcms_PixelFormat_RGBA_8888; +#else + *outFormat = skcms_PixelFormat_BGRA_8888; +#endif + break; + } + *outFormat = skcms_PixelFormat_BGR_565; + break; + case kRGBA_F16_SkColorType: + *outFormat = skcms_PixelFormat_RGBA_hhhh; + break; + case kBGR_101010x_XR_SkColorType: + *outFormat = skcms_PixelFormat_BGR_101010x_XR; + break; + case kGray_8_SkColorType: + *outFormat = skcms_PixelFormat_G_8; + break; + default: + return false; + } + return true; +} + +bool SkCodec::initializeColorXform(const SkImageInfo& dstInfo, SkEncodedInfo::Alpha encodedAlpha, + bool srcIsOpaque) { + fXformTime = kNo_XformTime; + bool needsColorXform = false; + if (this->usesColorXform()) { + if (kRGBA_F16_SkColorType == dstInfo.colorType() || + kBGR_101010x_XR_SkColorType == dstInfo.colorType()) { + needsColorXform = true; + if (dstInfo.colorSpace()) { + dstInfo.colorSpace()->toProfile(&fDstProfile); + } else { + // Use the srcProfile to avoid conversion. + const auto* srcProfile = fEncodedInfo.profile(); + fDstProfile = srcProfile ? *srcProfile : *skcms_sRGB_profile(); + } + } else if (dstInfo.colorSpace()) { + dstInfo.colorSpace()->toProfile(&fDstProfile); + const auto* srcProfile = fEncodedInfo.profile(); + if (!srcProfile) { + srcProfile = skcms_sRGB_profile(); + } + if (!skcms_ApproximatelyEqualProfiles(srcProfile, &fDstProfile) ) { + needsColorXform = true; + } + } + } + + if (!this->conversionSupported(dstInfo, srcIsOpaque, needsColorXform)) { + return false; + } + + if (needsColorXform) { + fXformTime = SkEncodedInfo::kPalette_Color != fEncodedInfo.color() + || kRGBA_F16_SkColorType == dstInfo.colorType() + ? kDecodeRow_XformTime : kPalette_XformTime; + if (!sk_select_xform_format(dstInfo.colorType(), fXformTime == kPalette_XformTime, + &fDstXformFormat)) { + return false; + } + if (encodedAlpha == SkEncodedInfo::kUnpremul_Alpha + && dstInfo.alphaType() == kPremul_SkAlphaType) { + fDstXformAlphaFormat = skcms_AlphaFormat_PremulAsEncoded; + } else { + fDstXformAlphaFormat = skcms_AlphaFormat_Unpremul; + } + } + return true; +} + +void SkCodec::applyColorXform(void* dst, const void* src, int count) const { + // It is okay for srcProfile to be null. This will use sRGB. + const auto* srcProfile = fEncodedInfo.profile(); + SkAssertResult(skcms_Transform(src, fSrcXformFormat, skcms_AlphaFormat_Unpremul, srcProfile, + dst, fDstXformFormat, fDstXformAlphaFormat, &fDstProfile, + count)); +} + +std::vector SkCodec::getFrameInfo() { + const int frameCount = this->getFrameCount(); + SkASSERT(frameCount >= 0); + if (frameCount <= 0) { + return std::vector{}; + } + + if (frameCount == 1 && !this->onGetFrameInfo(0, nullptr)) { + // Not animated. + return std::vector{}; + } + + std::vector result(frameCount); + for (int i = 0; i < frameCount; ++i) { + SkAssertResult(this->onGetFrameInfo(i, &result[i])); + } + return result; +} + +const char* SkCodec::ResultToString(Result result) { + switch (result) { + case kSuccess: + return "success"; + case kIncompleteInput: + return "incomplete input"; + case kErrorInInput: + return "error in input"; + case kInvalidConversion: + return "invalid conversion"; + case kInvalidScale: + return "invalid scale"; + case kInvalidParameters: + return "invalid parameters"; + case kInvalidInput: + return "invalid input"; + case kCouldNotRewind: + return "could not rewind"; + case kInternalError: + return "internal error"; + case kUnimplemented: + return "unimplemented"; + default: + SkASSERT(false); + return "bogus result value"; + } +} + +void SkFrame::fillIn(SkCodec::FrameInfo* frameInfo, bool fullyReceived) const { + SkASSERT(frameInfo); + + frameInfo->fRequiredFrame = fRequiredFrame; + frameInfo->fDuration = fDuration; + frameInfo->fFullyReceived = fullyReceived; + frameInfo->fAlphaType = fHasAlpha ? kUnpremul_SkAlphaType + : kOpaque_SkAlphaType; + frameInfo->fHasAlphaWithinBounds = this->reportedAlpha() != SkEncodedInfo::kOpaque_Alpha; + frameInfo->fDisposalMethod = fDisposalMethod; + frameInfo->fBlend = fBlend; + frameInfo->fFrameRect = fRect; +} + +static bool independent(const SkFrame& frame) { + return frame.getRequiredFrame() == SkCodec::kNoFrame; +} + +static bool restore_bg(const SkFrame& frame) { + return frame.getDisposalMethod() == SkCodecAnimation::DisposalMethod::kRestoreBGColor; +} + +// As its name suggests, this method computes a frame's alpha (e.g. completely +// opaque, unpremul, binary) and its required frame (a preceding frame that +// this frame depends on, to draw the complete image at this frame's point in +// the animation stream), and calls this frame's setter methods with that +// computed information. +// +// A required frame of kNoFrame means that this frame is independent: drawing +// the complete image at this frame's point in the animation stream does not +// require first preparing the pixel buffer based on another frame. Instead, +// drawing can start from an uninitialized pixel buffer. +// +// "Uninitialized" is from the SkCodec's caller's point of view. In the SkCodec +// implementation, for independent frames, first party Skia code (in src/codec) +// will typically fill the buffer with a uniform background color (e.g. +// transparent black) before calling into third party codec-specific code (e.g. +// libjpeg or libpng). Pixels outside of the frame's rect will remain this +// background color after drawing this frame. For incomplete decodes, pixels +// inside that rect may be (at least temporarily) set to that background color. +// In an incremental decode, later passes may then overwrite that background +// color. +// +// Determining kNoFrame or otherwise involves testing a number of conditions +// sequentially. The first satisfied condition results in setting the required +// frame to kNoFrame (an "INDx" condition) or to a non-negative frame number (a +// "DEPx" condition), and the function returning early. Those "INDx" and "DEPx" +// labels also map to comments in the function body. +// +// - IND1: this frame is the first frame. +// - IND2: this frame fills out the whole image, and it is completely opaque +// or it overwrites (not blends with) the previous frame. +// - IND3: all preceding frames' disposals are kRestorePrevious. +// - IND4: the prevFrame's disposal is kRestoreBGColor, and it fills out the +// whole image or it is itself otherwise independent. +// - DEP5: this frame reports alpha (it is not completely opaque) and it +// blends with (not overwrites) the previous frame. +// - IND6: this frame's rect covers the rects of all preceding frames back to +// and including the most recent independent frame before this frame. +// - DEP7: unconditional. +// +// The "prevFrame" variable initially points to the previous frame (also known +// as the prior frame), but that variable may iterate further backwards over +// the course of this computation. +void SkFrameHolder::setAlphaAndRequiredFrame(SkFrame* frame) { + const bool reportsAlpha = frame->reportedAlpha() != SkEncodedInfo::kOpaque_Alpha; + const auto screenRect = SkIRect::MakeWH(fScreenWidth, fScreenHeight); + const auto frameRect = frame_rect_on_screen(frame->frameRect(), screenRect); + + const int i = frame->frameId(); + if (0 == i) { + frame->setHasAlpha(reportsAlpha || frameRect != screenRect); + frame->setRequiredFrame(SkCodec::kNoFrame); // IND1 + return; + } + + + const bool blendWithPrevFrame = frame->getBlend() == SkCodecAnimation::Blend::kSrcOver; + if ((!reportsAlpha || !blendWithPrevFrame) && frameRect == screenRect) { + frame->setHasAlpha(reportsAlpha); + frame->setRequiredFrame(SkCodec::kNoFrame); // IND2 + return; + } + + const SkFrame* prevFrame = this->getFrame(i-1); + while (prevFrame->getDisposalMethod() == SkCodecAnimation::DisposalMethod::kRestorePrevious) { + const int prevId = prevFrame->frameId(); + if (0 == prevId) { + frame->setHasAlpha(true); + frame->setRequiredFrame(SkCodec::kNoFrame); // IND3 + return; + } + + prevFrame = this->getFrame(prevId - 1); + } + + const bool clearPrevFrame = restore_bg(*prevFrame); + auto prevFrameRect = frame_rect_on_screen(prevFrame->frameRect(), screenRect); + + if (clearPrevFrame) { + if (prevFrameRect == screenRect || independent(*prevFrame)) { + frame->setHasAlpha(true); + frame->setRequiredFrame(SkCodec::kNoFrame); // IND4 + return; + } + } + + if (reportsAlpha && blendWithPrevFrame) { + // Note: We could be more aggressive here. If prevFrame clears + // to background color and covers its required frame (and that + // frame is independent), prevFrame could be marked independent. + // Would this extra complexity be worth it? + frame->setRequiredFrame(prevFrame->frameId()); // DEP5 + frame->setHasAlpha(prevFrame->hasAlpha() || clearPrevFrame); + return; + } + + while (frameRect.contains(prevFrameRect)) { + const int prevRequiredFrame = prevFrame->getRequiredFrame(); + if (prevRequiredFrame == SkCodec::kNoFrame) { + frame->setRequiredFrame(SkCodec::kNoFrame); // IND6 + frame->setHasAlpha(true); + return; + } + + prevFrame = this->getFrame(prevRequiredFrame); + prevFrameRect = frame_rect_on_screen(prevFrame->frameRect(), screenRect); + } + + frame->setRequiredFrame(prevFrame->frameId()); // DEP7 + if (restore_bg(*prevFrame)) { + frame->setHasAlpha(true); + return; + } + SkASSERT(prevFrame->getDisposalMethod() == SkCodecAnimation::DisposalMethod::kKeep); + frame->setHasAlpha(prevFrame->hasAlpha() || (reportsAlpha && !blendWithPrevFrame)); +} + diff --git a/gfx/skia/skia/src/codec/SkCodecImageGenerator.cpp b/gfx/skia/skia/src/codec/SkCodecImageGenerator.cpp new file mode 100644 index 0000000000..5df8729148 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkCodecImageGenerator.cpp @@ -0,0 +1,110 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/codec/SkCodecImageGenerator.h" + +#include "include/codec/SkEncodedOrigin.h" +#include "include/core/SkAlphaType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkTypes.h" +#include "src/codec/SkPixmapUtils.h" + +#include + + +std::unique_ptr SkCodecImageGenerator::MakeFromEncodedCodec( + sk_sp data, std::optional at) { + auto codec = SkCodec::MakeFromData(data); + if (nullptr == codec) { + return nullptr; + } + + return std::unique_ptr(new SkCodecImageGenerator(std::move(codec), data, at)); +} + +std::unique_ptr SkCodecImageGenerator::MakeFromCodec( + std::unique_ptr codec) { + return codec ? std::unique_ptr( + new SkCodecImageGenerator(std::move(codec), nullptr, std::nullopt)) + : nullptr; +} + +static SkImageInfo adjust_info(SkCodec* codec, std::optional at) { + SkASSERT(at != kOpaque_SkAlphaType); + SkImageInfo info = codec->getInfo(); + if (at.has_value()) { + // If a specific alpha type was requested, use that. + info = info.makeAlphaType(*at); + } else if (kUnpremul_SkAlphaType == info.alphaType()) { + // Otherwise, prefer premul over unpremul (this produces better filtering in general) + info = info.makeAlphaType(kPremul_SkAlphaType); + } + if (SkEncodedOriginSwapsWidthHeight(codec->getOrigin())) { + info = SkPixmapUtils::SwapWidthHeight(info); + } + return info; +} + +SkCodecImageGenerator::SkCodecImageGenerator(std::unique_ptr codec, + sk_sp data, + std::optional at) + : INHERITED(adjust_info(codec.get(), at)) + , fCodec(std::move(codec)) + , fData(std::move(data)) {} + +sk_sp SkCodecImageGenerator::onRefEncodedData() { + return fData; +} + +bool SkCodecImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, const SkCodec::Options* options) { + SkPixmap dst(info, pixels, rowBytes); + + auto decode = [this, options](const SkPixmap& pm) { + SkCodec::Result result = fCodec->getPixels(pm, options); + switch (result) { + case SkCodec::kSuccess: + case SkCodec::kIncompleteInput: + case SkCodec::kErrorInInput: + return true; + default: + return false; + } + }; + + return SkPixmapUtils::Orient(dst, fCodec->getOrigin(), decode); +} + +bool SkCodecImageGenerator::onGetPixels(const SkImageInfo& requestInfo, void* requestPixels, + size_t requestRowBytes, const Options& options) { + return this->getPixels(requestInfo, requestPixels, requestRowBytes, nullptr); +} + +bool SkCodecImageGenerator::onQueryYUVAInfo( + const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes, + SkYUVAPixmapInfo* yuvaPixmapInfo) const { + return fCodec->queryYUVAInfo(supportedDataTypes, yuvaPixmapInfo); +} + +bool SkCodecImageGenerator::onGetYUVAPlanes(const SkYUVAPixmaps& yuvaPixmaps) { + switch (fCodec->getYUVAPlanes(yuvaPixmaps)) { + case SkCodec::kSuccess: + case SkCodec::kIncompleteInput: + case SkCodec::kErrorInInput: + return true; + default: + return false; + } +} + +SkISize SkCodecImageGenerator::getScaledDimensions(float desiredScale) const { + SkISize size = fCodec->getScaledDimensions(desiredScale); + if (SkEncodedOriginSwapsWidthHeight(fCodec->getOrigin())) { + std::swap(size.fWidth, size.fHeight); + } + return size; +} diff --git a/gfx/skia/skia/src/codec/SkCodecImageGenerator.h b/gfx/skia/skia/src/codec/SkCodecImageGenerator.h new file mode 100644 index 0000000000..5823ebd9cd --- /dev/null +++ b/gfx/skia/skia/src/codec/SkCodecImageGenerator.h @@ -0,0 +1,128 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkCodecImageGenerator_DEFINED +#define SkCodecImageGenerator_DEFINED + +#include "include/codec/SkCodec.h" +#include "include/core/SkData.h" +#include "include/core/SkImageGenerator.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "include/core/SkYUVAPixmaps.h" + +#include +#include +#include + +enum SkAlphaType : int; +struct SkImageInfo; + +class SkCodecImageGenerator : public SkImageGenerator { +public: + /* + * If this data represents an encoded image that we know how to decode, + * return an SkCodecImageGenerator. Otherwise return nullptr. + */ + static std::unique_ptr MakeFromEncodedCodec( + sk_sp, std::optional = std::nullopt); + + static std::unique_ptr MakeFromCodec(std::unique_ptr); + + /** + * Return a size that approximately supports the desired scale factor. The codec may not be able + * to scale efficiently to the exact scale factor requested, so return a size that approximates + * that scale. The returned value is the codec's suggestion for the closest valid scale that it + * can natively support. + * + * This is similar to SkCodec::getScaledDimensions, but adjusts the returned dimensions based + * on the image's EXIF orientation. + */ + SkISize getScaledDimensions(float desiredScale) const; + + /** + * Decode into the given pixels, a block of memory of size at + * least (info.fHeight - 1) * rowBytes + (info.fWidth * + * bytesPerPixel) + * + * Repeated calls to this function should give the same results, + * allowing the PixelRef to be immutable. + * + * @param info A description of the format + * expected by the caller. This can simply be identical + * to the info returned by getInfo(). + * + * This contract also allows the caller to specify + * different output-configs, which the implementation can + * decide to support or not. + * + * A size that does not match getInfo() implies a request + * to scale. If the generator cannot perform this scale, + * it will return false. + * + * @return true on success. + */ + bool getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, const SkCodec::Options* options = nullptr); + + /** + * Return the number of frames in the image. + * + * May require reading through the stream. + */ + int getFrameCount() { return fCodec->getFrameCount(); } + + /** + * Return info about a single frame. + * + * Only supported by multi-frame images. Does not read through the stream, + * so it should be called after getFrameCount() to parse any frames that + * have not already been parsed. + */ + bool getFrameInfo(int index, SkCodec::FrameInfo* info) const { + return fCodec->getFrameInfo(index, info); + } + + /** + * Return the number of times to repeat, if this image is animated. This number does not + * include the first play through of each frame. For example, a repetition count of 4 means + * that each frame is played 5 times and then the animation stops. + * + * It can return kRepetitionCountInfinite, a negative number, meaning that the animation + * should loop forever. + * + * May require reading the stream to find the repetition count. + * + * As such, future decoding calls may require a rewind. + * + * For still (non-animated) image codecs, this will return 0. + */ + int getRepetitionCount() { return fCodec->getRepetitionCount(); } + +protected: + sk_sp onRefEncodedData() override; + + bool onGetPixels(const SkImageInfo& info, + void* pixels, + size_t rowBytes, + const Options& opts) override; + + bool onQueryYUVAInfo(const SkYUVAPixmapInfo::SupportedDataTypes&, + SkYUVAPixmapInfo*) const override; + + bool onGetYUVAPlanes(const SkYUVAPixmaps& yuvaPixmaps) override; + +private: + /* + * Takes ownership of codec + */ + SkCodecImageGenerator(std::unique_ptr, sk_sp, std::optional); + + std::unique_ptr fCodec; + sk_sp fData; + + using INHERITED = SkImageGenerator; +}; +#endif // SkCodecImageGenerator_DEFINED diff --git a/gfx/skia/skia/src/codec/SkCodecPriv.h b/gfx/skia/skia/src/codec/SkCodecPriv.h new file mode 100644 index 0000000000..8d05f11e91 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkCodecPriv.h @@ -0,0 +1,259 @@ +/* + * Copyright 2015 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCodecPriv_DEFINED +#define SkCodecPriv_DEFINED + +#include "include/codec/SkEncodedOrigin.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkTypes.h" +#include "include/private/SkColorData.h" +#include "include/private/SkEncodedInfo.h" +#include "src/codec/SkColorTable.h" +#include "src/base/SkEndian.h" + +#ifdef SK_PRINT_CODEC_MESSAGES + #define SkCodecPrintf SkDebugf +#else + #define SkCodecPrintf(...) +#endif + +// Defined in SkCodec.cpp +bool sk_select_xform_format(SkColorType colorType, bool forColorTable, + skcms_PixelFormat* outFormat); + +// FIXME: Consider sharing with dm, nanbench, and tools. +static inline float get_scale_from_sample_size(int sampleSize) { + return 1.0f / ((float) sampleSize); +} + +static inline bool is_valid_subset(const SkIRect& subset, const SkISize& imageDims) { + return SkIRect::MakeSize(imageDims).contains(subset); +} + +/* + * returns a scaled dimension based on the original dimension and the sampleSize + * NOTE: we round down here for scaled dimension to match the behavior of SkImageDecoder + * FIXME: I think we should call this get_sampled_dimension(). + */ +static inline int get_scaled_dimension(int srcDimension, int sampleSize) { + if (sampleSize > srcDimension) { + return 1; + } + return srcDimension / sampleSize; +} + +/* + * Returns the first coordinate that we will keep during a scaled decode. + * The output can be interpreted as an x-coordinate or a y-coordinate. + * + * This does not need to be called and is not called when sampleFactor == 1. + */ +static inline int get_start_coord(int sampleFactor) { return sampleFactor / 2; } + +/* + * Given a coordinate in the original image, this returns the corresponding + * coordinate in the scaled image. This function is meaningless if + * IsCoordNecessary returns false. + * The output can be interpreted as an x-coordinate or a y-coordinate. + * + * This does not need to be called and is not called when sampleFactor == 1. + */ +static inline int get_dst_coord(int srcCoord, int sampleFactor) { return srcCoord / sampleFactor; } + +/* + * When scaling, we will discard certain y-coordinates (rows) and + * x-coordinates (columns). This function returns true if we should keep the + * coordinate and false otherwise. + * The inputs may be x-coordinates or y-coordinates. + * + * This does not need to be called and is not called when sampleFactor == 1. + */ +static inline bool is_coord_necessary(int srcCoord, int sampleFactor, int scaledDim) { + // Get the first coordinate that we want to keep + int startCoord = get_start_coord(sampleFactor); + + // Return false on edge cases + if (srcCoord < startCoord || get_dst_coord(srcCoord, sampleFactor) >= scaledDim) { + return false; + } + + // Every sampleFactor rows are necessary + return ((srcCoord - startCoord) % sampleFactor) == 0; +} + +static inline bool valid_alpha(SkAlphaType dstAlpha, bool srcIsOpaque) { + if (kUnknown_SkAlphaType == dstAlpha) { + return false; + } + + if (srcIsOpaque) { + if (kOpaque_SkAlphaType != dstAlpha) { + SkCodecPrintf("Warning: an opaque image should be decoded as opaque " + "- it is being decoded as non-opaque, which will draw slower\n"); + } + return true; + } + + return dstAlpha != kOpaque_SkAlphaType; +} + +/* + * If there is a color table, get a pointer to the colors, otherwise return nullptr + */ +static inline const SkPMColor* get_color_ptr(SkColorTable* colorTable) { + return nullptr != colorTable ? colorTable->readColors() : nullptr; +} + +/* + * Compute row bytes for an image using pixels per byte + */ +static inline size_t compute_row_bytes_ppb(int width, uint32_t pixelsPerByte) { + return (width + pixelsPerByte - 1) / pixelsPerByte; +} + +/* + * Compute row bytes for an image using bytes per pixel + */ +static inline size_t compute_row_bytes_bpp(int width, uint32_t bytesPerPixel) { + return width * bytesPerPixel; +} + +/* + * Compute row bytes for an image + */ +static inline size_t compute_row_bytes(int width, uint32_t bitsPerPixel) { + if (bitsPerPixel < 16) { + SkASSERT(0 == 8 % bitsPerPixel); + const uint32_t pixelsPerByte = 8 / bitsPerPixel; + return compute_row_bytes_ppb(width, pixelsPerByte); + } else { + SkASSERT(0 == bitsPerPixel % 8); + const uint32_t bytesPerPixel = bitsPerPixel / 8; + return compute_row_bytes_bpp(width, bytesPerPixel); + } +} + +/* + * Get a byte from a buffer + * This method is unsafe, the caller is responsible for performing a check + */ +static inline uint8_t get_byte(const uint8_t* buffer, uint32_t i) { + return buffer[i]; +} + +/* + * Get a short from a buffer + * This method is unsafe, the caller is responsible for performing a check + */ +static inline uint16_t get_short(const uint8_t* buffer, uint32_t i) { + uint16_t result; + memcpy(&result, &(buffer[i]), 2); +#ifdef SK_CPU_BENDIAN + return SkEndianSwap16(result); +#else + return result; +#endif +} + +/* + * Get an int from a buffer + * This method is unsafe, the caller is responsible for performing a check + */ +static inline uint32_t get_int(const uint8_t* buffer, uint32_t i) { + uint32_t result; + memcpy(&result, &(buffer[i]), 4); +#ifdef SK_CPU_BENDIAN + return SkEndianSwap32(result); +#else + return result; +#endif +} + +/* + * @param data Buffer to read bytes from + * @param isLittleEndian Output parameter + * Indicates if the data is little endian + * Is unaffected on false returns + */ +static inline bool is_valid_endian_marker(const uint8_t* data, bool* isLittleEndian) { + // II indicates Intel (little endian) and MM indicates motorola (big endian). + if (('I' != data[0] || 'I' != data[1]) && ('M' != data[0] || 'M' != data[1])) { + return false; + } + + *isLittleEndian = ('I' == data[0]); + return true; +} + +static inline uint16_t get_endian_short(const uint8_t* data, bool littleEndian) { + if (littleEndian) { + return (data[1] << 8) | (data[0]); + } + + return (data[0] << 8) | (data[1]); +} + +static inline uint32_t get_endian_int(const uint8_t* data, bool littleEndian) { + if (littleEndian) { + return (data[3] << 24) | (data[2] << 16) | (data[1] << 8) | (data[0]); + } + + return (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | (data[3]); +} + +static inline SkPMColor premultiply_argb_as_rgba(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + if (a != 255) { + r = SkMulDiv255Round(r, a); + g = SkMulDiv255Round(g, a); + b = SkMulDiv255Round(b, a); + } + + return SkPackARGB_as_RGBA(a, r, g, b); +} + +static inline SkPMColor premultiply_argb_as_bgra(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + if (a != 255) { + r = SkMulDiv255Round(r, a); + g = SkMulDiv255Round(g, a); + b = SkMulDiv255Round(b, a); + } + + return SkPackARGB_as_BGRA(a, r, g, b); +} + +static inline bool is_rgba(SkColorType colorType) { +#ifdef SK_PMCOLOR_IS_RGBA + return (kBGRA_8888_SkColorType != colorType); +#else + return (kRGBA_8888_SkColorType == colorType); +#endif +} + +// Method for coverting to a 32 bit pixel. +typedef uint32_t (*PackColorProc)(U8CPU a, U8CPU r, U8CPU g, U8CPU b); + +static inline PackColorProc choose_pack_color_proc(bool isPremul, SkColorType colorType) { + bool isRGBA = is_rgba(colorType); + if (isPremul) { + if (isRGBA) { + return &premultiply_argb_as_rgba; + } else { + return &premultiply_argb_as_bgra; + } + } else { + if (isRGBA) { + return &SkPackARGB_as_RGBA; + } else { + return &SkPackARGB_as_BGRA; + } + } +} + +bool is_orientation_marker(const uint8_t* data, size_t data_length, SkEncodedOrigin* orientation); + +#endif // SkCodecPriv_DEFINED diff --git a/gfx/skia/skia/src/codec/SkColorTable.cpp b/gfx/skia/skia/src/codec/SkColorTable.cpp new file mode 100644 index 0000000000..5c700689e5 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkColorTable.cpp @@ -0,0 +1,25 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/codec/SkColorTable.h" + +#include "include/private/base/SkMalloc.h" + +#include + +SkColorTable::SkColorTable(const SkPMColor colors[], int count) { + SkASSERT(0 == count || colors); + SkASSERT(count >= 0 && count <= 256); + + fCount = count; + fColors = reinterpret_cast(sk_malloc_throw(count * sizeof(SkPMColor))); + + memcpy(fColors, colors, count * sizeof(SkPMColor)); +} + +SkColorTable::~SkColorTable() { + sk_free(fColors); +} diff --git a/gfx/skia/skia/src/codec/SkColorTable.h b/gfx/skia/skia/src/codec/SkColorTable.h new file mode 100644 index 0000000000..b2f4f3f66d --- /dev/null +++ b/gfx/skia/skia/src/codec/SkColorTable.h @@ -0,0 +1,51 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorTable_DEFINED +#define SkColorTable_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +/** \class SkColorTable + + SkColorTable holds an array SkPMColors (premultiplied 32-bit colors) used by + 8-bit bitmaps, where the bitmap bytes are interpreted as indices into the colortable. + + SkColorTable is thread-safe. +*/ +class SkColorTable : public SkRefCnt { +public: + /** Copy up to 256 colors into a new SkColorTable. + */ + SkColorTable(const SkPMColor colors[], int count); + ~SkColorTable() override; + + /** Returns the number of colors in the table. + */ + int count() const { return fCount; } + + /** Returns the specified color from the table. In the debug build, this asserts that + * the index is in range (0 <= index < count). + */ + SkPMColor operator[](int index) const { + SkASSERT(fColors != nullptr && (unsigned)index < (unsigned)fCount); + return fColors[index]; + } + + /** Return the array of colors for reading. */ + const SkPMColor* readColors() const { return fColors; } + +private: + SkPMColor* fColors; + int fCount; + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/src/codec/SkEncodedInfo.cpp b/gfx/skia/skia/src/codec/SkEncodedInfo.cpp new file mode 100644 index 0000000000..56f1a0259d --- /dev/null +++ b/gfx/skia/skia/src/codec/SkEncodedInfo.cpp @@ -0,0 +1,30 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkEncodedInfo.h" + +#include "modules/skcms/skcms.h" + +std::unique_ptr SkEncodedInfo::ICCProfile::Make(sk_sp data) { + if (data) { + skcms_ICCProfile profile; + if (skcms_Parse(data->data(), data->size(), &profile)) { + return std::unique_ptr(new ICCProfile(profile, std::move(data))); + } + } + return nullptr; +} + +std::unique_ptr SkEncodedInfo::ICCProfile::Make( + const skcms_ICCProfile& profile) { + return std::unique_ptr(new ICCProfile(profile)); +} + +SkEncodedInfo::ICCProfile::ICCProfile(const skcms_ICCProfile& profile, sk_sp data) + : fProfile(profile) + , fData(std::move(data)) +{} diff --git a/gfx/skia/skia/src/codec/SkFrameHolder.h b/gfx/skia/skia/src/codec/SkFrameHolder.h new file mode 100644 index 0000000000..5facbd872a --- /dev/null +++ b/gfx/skia/skia/src/codec/SkFrameHolder.h @@ -0,0 +1,206 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFrameHolder_DEFINED +#define SkFrameHolder_DEFINED + +#include "include/codec/SkCodec.h" +#include "include/codec/SkCodecAnimation.h" +#include "include/core/SkRect.h" +#include "include/core/SkTypes.h" +#include "include/private/SkEncodedInfo.h" +#include "include/private/base/SkNoncopyable.h" + +/** + * Base class for a single frame of an animated image. + * + * Separate from SkCodec::FrameInfo, which is a pared down + * interface that only contains the info the client needs. + */ +class SkFrame : public SkNoncopyable { +public: + SkFrame(int id) + : fId(id) + , fHasAlpha(false) + , fRequiredFrame(kUninitialized) + , fDisposalMethod(SkCodecAnimation::DisposalMethod::kKeep) + , fDuration(0) + , fBlend(SkCodecAnimation::Blend::kSrcOver) + { + fRect.setEmpty(); + } + + virtual ~SkFrame() {} + + /** + * An explicit move constructor, as + * https://en.cppreference.com/w/cpp/language/move_constructor says that + * there is no implicit move constructor if there are user-declared + * destructors, and we have one, immediately above. + * + * Without a move constructor, it is harder to use an SkFrame, or an + * SkFrame subclass, inside a std::vector. + */ + SkFrame(SkFrame&&) = default; + + /** + * 0-based index of the frame in the image sequence. + */ + int frameId() const { return fId; } + + /** + * How this frame reports its alpha. + * + * This only considers the rectangle of this frame, and + * considers it to have alpha even if it is opaque once + * blended with the frame behind it. + */ + SkEncodedInfo::Alpha reportedAlpha() const { + return this->onReportedAlpha(); + } + + /** + * Cached value representing whether the frame has alpha, + * after compositing with the prior frame. + */ + bool hasAlpha() const { return fHasAlpha; } + + /** + * Cache whether the finished frame has alpha. + */ + void setHasAlpha(bool alpha) { fHasAlpha = alpha; } + + /** + * Whether enough of the frame has been read to determine + * fRequiredFrame and fHasAlpha. + */ + bool reachedStartOfData() const { return fRequiredFrame != kUninitialized; } + + /** + * The frame this one depends on. + * + * Must not be called until fRequiredFrame has been set properly. + */ + int getRequiredFrame() const { + SkASSERT(this->reachedStartOfData()); + return fRequiredFrame; + } + + /** + * Set the frame that this frame depends on. + */ + void setRequiredFrame(int req) { fRequiredFrame = req; } + + /** + * Set the rectangle that is updated by this frame. + */ + void setXYWH(int x, int y, int width, int height) { + fRect.setXYWH(x, y, width, height); + } + + /** + * The rectangle that is updated by this frame. + */ + SkIRect frameRect() const { return fRect; } + + int xOffset() const { return fRect.x(); } + int yOffset() const { return fRect.y(); } + int width() const { return fRect.width(); } + int height() const { return fRect.height(); } + + SkCodecAnimation::DisposalMethod getDisposalMethod() const { + return fDisposalMethod; + } + + void setDisposalMethod(SkCodecAnimation::DisposalMethod disposalMethod) { + fDisposalMethod = disposalMethod; + } + + /** + * Set the duration (in ms) to show this frame. + */ + void setDuration(int duration) { + fDuration = duration; + } + + /** + * Duration in ms to show this frame. + */ + int getDuration() const { + return fDuration; + } + + void setBlend(SkCodecAnimation::Blend blend) { + fBlend = blend; + } + + SkCodecAnimation::Blend getBlend() const { + return fBlend; + } + + /** + * Fill in the FrameInfo with details from this object. + */ + void fillIn(SkCodec::FrameInfo*, bool fullyReceived) const; + +protected: + virtual SkEncodedInfo::Alpha onReportedAlpha() const = 0; + +private: + inline static constexpr int kUninitialized = -2; + + const int fId; + bool fHasAlpha; + int fRequiredFrame; + SkIRect fRect; + SkCodecAnimation::DisposalMethod fDisposalMethod; + int fDuration; + SkCodecAnimation::Blend fBlend; +}; + +/** + * Base class for an object which holds the SkFrames of an + * image sequence. + */ +class SkFrameHolder : public SkNoncopyable { +public: + SkFrameHolder() + : fScreenWidth(0) + , fScreenHeight(0) + {} + + virtual ~SkFrameHolder() {} + + /** + * Size of the image. Each frame will be contained in + * these dimensions (possibly after clipping). + */ + int screenWidth() const { return fScreenWidth; } + int screenHeight() const { return fScreenHeight; } + + /** + * Compute the opacity and required frame, based on + * the frame's reportedAlpha and how it blends + * with prior frames. + */ + void setAlphaAndRequiredFrame(SkFrame*); + + /** + * Return the frame with frameId i. + */ + const SkFrame* getFrame(int i) const { + return this->onGetFrame(i); + } + +protected: + int fScreenWidth; + int fScreenHeight; + + virtual const SkFrame* onGetFrame(int i) const = 0; +}; + +#endif // SkFrameHolder_DEFINED diff --git a/gfx/skia/skia/src/codec/SkMaskSwizzler.cpp b/gfx/skia/skia/src/codec/SkMaskSwizzler.cpp new file mode 100644 index 0000000000..4866e876a0 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkMaskSwizzler.cpp @@ -0,0 +1,575 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/codec/SkMaskSwizzler.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRect.h" +#include "include/private/SkColorData.h" +#include "src/codec/SkCodecPriv.h" +#include "src/codec/SkMasks.h" + +static void swizzle_mask16_to_rgba_opaque( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint16_t* srcPtr = ((uint16_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint16_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPackARGB_as_RGBA(0xFF, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask16_to_bgra_opaque( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint16_t* srcPtr = ((uint16_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint16_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPackARGB_as_BGRA(0xFF, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask16_to_rgba_unpremul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint16_t* srcPtr = ((uint16_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint16_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = SkPackARGB_as_RGBA(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask16_to_bgra_unpremul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint16_t* srcPtr = ((uint16_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint16_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = SkPackARGB_as_BGRA(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask16_to_rgba_premul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint16_t* srcPtr = ((uint16_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint16_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = premultiply_argb_as_rgba(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask16_to_bgra_premul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint16_t* srcPtr = ((uint16_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint16_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = premultiply_argb_as_bgra(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +// TODO (msarett): We have promoted a two byte per pixel image to 8888, only to +// convert it back to 565. Instead, we should swizzle to 565 directly. +static void swizzle_mask16_to_565( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint16_t* srcPtr = ((uint16_t*) srcRow) + startX; + uint16_t* dstPtr = (uint16_t*) dstRow; + for (int i = 0; i < width; i++) { + uint16_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPack888ToRGB16(red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask24_to_rgba_opaque( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + srcRow += 3 * startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcRow[0] | (srcRow[1] << 8) | srcRow[2] << 16; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPackARGB_as_RGBA(0xFF, red, green, blue); + srcRow += 3 * sampleX; + } +} + +static void swizzle_mask24_to_bgra_opaque( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + srcRow += 3 * startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcRow[0] | (srcRow[1] << 8) | srcRow[2] << 16; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPackARGB_as_BGRA(0xFF, red, green, blue); + srcRow += 3 * sampleX; + } +} + +static void swizzle_mask24_to_rgba_unpremul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + srcRow += 3 * startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcRow[0] | (srcRow[1] << 8) | srcRow[2] << 16; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = SkPackARGB_as_RGBA(alpha, red, green, blue); + srcRow += 3 * sampleX; + } +} + +static void swizzle_mask24_to_bgra_unpremul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + srcRow += 3 * startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcRow[0] | (srcRow[1] << 8) | srcRow[2] << 16; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = SkPackARGB_as_BGRA(alpha, red, green, blue); + srcRow += 3 * sampleX; + } +} + +static void swizzle_mask24_to_rgba_premul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + srcRow += 3 * startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcRow[0] | (srcRow[1] << 8) | srcRow[2] << 16; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = premultiply_argb_as_rgba(alpha, red, green, blue); + srcRow += 3 * sampleX; + } +} + +static void swizzle_mask24_to_bgra_premul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + srcRow += 3 * startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcRow[0] | (srcRow[1] << 8) | srcRow[2] << 16; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = premultiply_argb_as_bgra(alpha, red, green, blue); + srcRow += 3 * sampleX; + } +} + +static void swizzle_mask24_to_565( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + srcRow += 3 * startX; + uint16_t* dstPtr = (uint16_t*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcRow[0] | (srcRow[1] << 8) | srcRow[2] << 16; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPack888ToRGB16(red, green, blue); + srcRow += 3 * sampleX; + } +} + +static void swizzle_mask32_to_rgba_opaque( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint32_t* srcPtr = ((uint32_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPackARGB_as_RGBA(0xFF, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask32_to_bgra_opaque( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint32_t* srcPtr = ((uint32_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPackARGB_as_BGRA(0xFF, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask32_to_rgba_unpremul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint32_t* srcPtr = ((uint32_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = SkPackARGB_as_RGBA(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask32_to_bgra_unpremul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint32_t* srcPtr = ((uint32_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = SkPackARGB_as_BGRA(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask32_to_rgba_premul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint32_t* srcPtr = ((uint32_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = premultiply_argb_as_rgba(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask32_to_bgra_premul( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + + // Use the masks to decode to the destination + uint32_t* srcPtr = ((uint32_t*) srcRow) + startX; + SkPMColor* dstPtr = (SkPMColor*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + uint8_t alpha = masks->getAlpha(p); + dstPtr[i] = premultiply_argb_as_bgra(alpha, red, green, blue); + srcPtr += sampleX; + } +} + +static void swizzle_mask32_to_565( + void* dstRow, const uint8_t* srcRow, int width, SkMasks* masks, + uint32_t startX, uint32_t sampleX) { + // Use the masks to decode to the destination + uint32_t* srcPtr = ((uint32_t*) srcRow) + startX; + uint16_t* dstPtr = (uint16_t*) dstRow; + for (int i = 0; i < width; i++) { + uint32_t p = srcPtr[0]; + uint8_t red = masks->getRed(p); + uint8_t green = masks->getGreen(p); + uint8_t blue = masks->getBlue(p); + dstPtr[i] = SkPack888ToRGB16(red, green, blue); + srcPtr += sampleX; + } +} + +/* + * + * Create a new mask swizzler + * + */ +SkMaskSwizzler* SkMaskSwizzler::CreateMaskSwizzler(const SkImageInfo& dstInfo, + bool srcIsOpaque, SkMasks* masks, uint32_t bitsPerPixel, + const SkCodec::Options& options) { + + // Choose the appropriate row procedure + RowProc proc = nullptr; + switch (bitsPerPixel) { + case 16: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + if (srcIsOpaque) { + proc = &swizzle_mask16_to_rgba_opaque; + } else { + switch (dstInfo.alphaType()) { + case kUnpremul_SkAlphaType: + proc = &swizzle_mask16_to_rgba_unpremul; + break; + case kPremul_SkAlphaType: + proc = &swizzle_mask16_to_rgba_premul; + break; + default: + break; + } + } + break; + case kBGRA_8888_SkColorType: + if (srcIsOpaque) { + proc = &swizzle_mask16_to_bgra_opaque; + } else { + switch (dstInfo.alphaType()) { + case kUnpremul_SkAlphaType: + proc = &swizzle_mask16_to_bgra_unpremul; + break; + case kPremul_SkAlphaType: + proc = &swizzle_mask16_to_bgra_premul; + break; + default: + break; + } + } + break; + case kRGB_565_SkColorType: + proc = &swizzle_mask16_to_565; + break; + default: + break; + } + break; + case 24: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + if (srcIsOpaque) { + proc = &swizzle_mask24_to_rgba_opaque; + } else { + switch (dstInfo.alphaType()) { + case kUnpremul_SkAlphaType: + proc = &swizzle_mask24_to_rgba_unpremul; + break; + case kPremul_SkAlphaType: + proc = &swizzle_mask24_to_rgba_premul; + break; + default: + break; + } + } + break; + case kBGRA_8888_SkColorType: + if (srcIsOpaque) { + proc = &swizzle_mask24_to_bgra_opaque; + } else { + switch (dstInfo.alphaType()) { + case kUnpremul_SkAlphaType: + proc = &swizzle_mask24_to_bgra_unpremul; + break; + case kPremul_SkAlphaType: + proc = &swizzle_mask24_to_bgra_premul; + break; + default: + break; + } + } + break; + case kRGB_565_SkColorType: + proc = &swizzle_mask24_to_565; + break; + default: + break; + } + break; + case 32: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + if (srcIsOpaque) { + proc = &swizzle_mask32_to_rgba_opaque; + } else { + switch (dstInfo.alphaType()) { + case kUnpremul_SkAlphaType: + proc = &swizzle_mask32_to_rgba_unpremul; + break; + case kPremul_SkAlphaType: + proc = &swizzle_mask32_to_rgba_premul; + break; + default: + break; + } + } + break; + case kBGRA_8888_SkColorType: + if (srcIsOpaque) { + proc = &swizzle_mask32_to_bgra_opaque; + } else { + switch (dstInfo.alphaType()) { + case kUnpremul_SkAlphaType: + proc = &swizzle_mask32_to_bgra_unpremul; + break; + case kPremul_SkAlphaType: + proc = &swizzle_mask32_to_bgra_premul; + break; + default: + break; + } + } + break; + case kRGB_565_SkColorType: + proc = &swizzle_mask32_to_565; + break; + default: + break; + } + break; + default: + SkASSERT(false); + return nullptr; + } + + int srcOffset = 0; + int srcWidth = dstInfo.width(); + if (options.fSubset) { + srcOffset = options.fSubset->left(); + srcWidth = options.fSubset->width(); + } + + return new SkMaskSwizzler(masks, proc, srcOffset, srcWidth); +} + +/* + * + * Constructor for mask swizzler + * + */ +SkMaskSwizzler::SkMaskSwizzler(SkMasks* masks, RowProc proc, int srcOffset, int subsetWidth) + : fMasks(masks) + , fRowProc(proc) + , fSubsetWidth(subsetWidth) + , fDstWidth(subsetWidth) + , fSampleX(1) + , fSrcOffset(srcOffset) + , fX0(srcOffset) +{} + +int SkMaskSwizzler::onSetSampleX(int sampleX) { + // FIXME: Share this function with SkSwizzler? + SkASSERT(sampleX > 0); // Surely there is an upper limit? Should there be + // way to report failure? + fSampleX = sampleX; + fX0 = get_start_coord(sampleX) + fSrcOffset; + fDstWidth = get_scaled_dimension(fSubsetWidth, sampleX); + + // check that fX0 is valid + SkASSERT(fX0 >= 0); + return fDstWidth; +} + +/* + * + * Swizzle the specified row + * + */ +void SkMaskSwizzler::swizzle(void* dst, const uint8_t* SK_RESTRICT src) { + SkASSERT(nullptr != dst && nullptr != src); + fRowProc(dst, src, fDstWidth, fMasks, fX0, fSampleX); +} diff --git a/gfx/skia/skia/src/codec/SkMaskSwizzler.h b/gfx/skia/skia/src/codec/SkMaskSwizzler.h new file mode 100644 index 0000000000..4cac41905c --- /dev/null +++ b/gfx/skia/skia/src/codec/SkMaskSwizzler.h @@ -0,0 +1,76 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkMaskSwizzler_DEFINED +#define SkMaskSwizzler_DEFINED + +#include "include/codec/SkCodec.h" +#include "include/core/SkTypes.h" +#include "src/codec/SkSampler.h" + +#include + +class SkMasks; +struct SkImageInfo; + +/* + * + * Used to swizzle images whose pixel components are extracted by bit masks + * Currently only used by bmp + * + */ +class SkMaskSwizzler : public SkSampler { +public: + + /* + * @param masks Unowned pointer to helper class + */ + static SkMaskSwizzler* CreateMaskSwizzler(const SkImageInfo& dstInfo, + bool srcIsOpaque, + SkMasks* masks, + uint32_t bitsPerPixel, + const SkCodec::Options& options); + + /* + * Swizzle a row + */ + void swizzle(void* dst, const uint8_t* SK_RESTRICT src); + + int fillWidth() const override { + return fDstWidth; + } + + /** + * Returns the byte offset at which we write to destination memory, taking + * scaling, subsetting, and partial frames into account. + * A similar function exists on SkSwizzler. + */ + int swizzleWidth() const { return fDstWidth; } + +private: + + /* + * Row procedure used for swizzle + */ + typedef void (*RowProc)(void* dstRow, const uint8_t* srcRow, int width, + SkMasks* masks, uint32_t startX, uint32_t sampleX); + + SkMaskSwizzler(SkMasks* masks, RowProc proc, int subsetWidth, int srcOffset); + + int onSetSampleX(int) override; + + SkMasks* fMasks; // unowned + const RowProc fRowProc; + + // FIXME: Can this class share more with SkSwizzler? These variables are all the same. + const int fSubsetWidth; // Width of the subset of source before any sampling. + int fDstWidth; // Width of dst, which may differ with sampling. + int fSampleX; + int fSrcOffset; + int fX0; +}; + +#endif diff --git a/gfx/skia/skia/src/codec/SkMasks.cpp b/gfx/skia/skia/src/codec/SkMasks.cpp new file mode 100644 index 0000000000..c116167174 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkMasks.cpp @@ -0,0 +1,153 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/codec/SkMasks.h" + +#include "src/codec/SkCodecPriv.h" + +/* + * + * Used to convert 1-7 bit color components into 8-bit color components + * + */ +static constexpr uint8_t n_bit_to_8_bit_lookup_table[] = { + // 1 bit + 0, 255, + // 2 bits + 0, 85, 170, 255, + // 3 bits + 0, 36, 73, 109, 146, 182, 219, 255, + // 4 bits + 0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255, + // 5 bits + 0, 8, 16, 25, 33, 41, 49, 58, 66, 74, 82, 90, 99, 107, 115, 123, 132, 140, + 148, 156, 165, 173, 181, 189, 197, 206, 214, 222, 230, 239, 247, 255, + // 6 bits + 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 45, 49, 53, 57, 61, 65, 69, 73, + 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 130, 134, 138, + 142, 146, 150, 154, 158, 162, 166, 170, 174, 178, 182, 186, 190, 194, 198, + 202, 206, 210, 215, 219, 223, 227, 231, 235, 239, 243, 247, 251, 255, + // 7 bits + 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, + 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, + 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, + 112, 114, 116, 118, 120, 122, 124, 126, 129, 131, 133, 135, 137, 139, 141, + 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, + 173, 175, 177, 179, 181, 183, 185, 187, 189, 191, 193, 195, 197, 199, 201, + 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, + 233, 235, 237, 239, 241, 243, 245, 247, 249, 251, 253, 255 +}; + +/* + * + * Convert an n bit component to an 8-bit component + * + */ +static uint8_t convert_to_8(uint8_t component, uint32_t n) { + if (0 == n) { + return 0; + } else if (8 > n) { + return n_bit_to_8_bit_lookup_table[(1 << n) - 2 + component]; + } else { + SkASSERT(8 == n); + return component; + } +} + +static uint8_t get_comp(uint32_t pixel, uint32_t mask, uint32_t shift, + uint32_t size) { + return convert_to_8((pixel & mask) >> shift, size); +} + +/* + * + * Get a color component + * + */ +uint8_t SkMasks::getRed(uint32_t pixel) const { + return get_comp(pixel, fRed.mask, fRed.shift, fRed.size); +} +uint8_t SkMasks::getGreen(uint32_t pixel) const { + return get_comp(pixel, fGreen.mask, fGreen.shift, fGreen.size); +} +uint8_t SkMasks::getBlue(uint32_t pixel) const { + return get_comp(pixel, fBlue.mask, fBlue.shift, fBlue.size); +} +uint8_t SkMasks::getAlpha(uint32_t pixel) const { + return get_comp(pixel, fAlpha.mask, fAlpha.shift, fAlpha.size); +} + +/* + * + * Process an input mask to obtain the necessary information + * + */ +static SkMasks::MaskInfo process_mask(uint32_t mask) { + // Determine properties of the mask + uint32_t tempMask = mask; + uint32_t shift = 0; + uint32_t size = 0; + if (tempMask != 0) { + // Count trailing zeros on masks + for (; (tempMask & 1) == 0; tempMask >>= 1) { + shift++; + } + // Count the size of the mask + for (; tempMask & 1; tempMask >>= 1) { + size++; + } + // Verify that the mask is continuous + if (tempMask) { + SkCodecPrintf("Warning: Bit mask is not continuous.\n"); + // Finish processing the mask + for (; tempMask; tempMask >>= 1) { + size++; + } + } + // Truncate masks greater than 8 bits + if (size > 8) { + shift += size - 8; + size = 8; + mask &= 0xFF << shift; + } + } + + return { mask, shift, size }; +} + +/* + * + * Create the masks object + * + */ +SkMasks* SkMasks::CreateMasks(InputMasks masks, int bytesPerPixel) { + SkASSERT(0 < bytesPerPixel && bytesPerPixel <= 4); + + // Trim the input masks to match bytesPerPixel. + if (bytesPerPixel < 4) { + int bitsPerPixel = 8*bytesPerPixel; + masks.red &= (1 << bitsPerPixel) - 1; + masks.green &= (1 << bitsPerPixel) - 1; + masks.blue &= (1 << bitsPerPixel) - 1; + masks.alpha &= (1 << bitsPerPixel) - 1; + } + + // Check that masks do not overlap. + if (((masks.red & masks.green) | + (masks.red & masks.blue ) | + (masks.red & masks.alpha) | + (masks.green & masks.blue ) | + (masks.green & masks.alpha) | + (masks.blue & masks.alpha) ) != 0) { + return nullptr; + } + + return new SkMasks(process_mask(masks.red ), + process_mask(masks.green), + process_mask(masks.blue ), + process_mask(masks.alpha)); +} + diff --git a/gfx/skia/skia/src/codec/SkMasks.h b/gfx/skia/skia/src/codec/SkMasks.h new file mode 100644 index 0000000000..99d1a9bed7 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkMasks.h @@ -0,0 +1,61 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkMasks_DEFINED +#define SkMasks_DEFINED + +#include "include/core/SkTypes.h" + +#include + +// Contains useful mask routines for SkMaskSwizzler +class SkMasks { +public: + //Contains all of the information for a single mask + struct MaskInfo { + uint32_t mask; + uint32_t shift; // To the left + uint32_t size; // Of mask width + }; + + constexpr SkMasks(const MaskInfo red, const MaskInfo green, const MaskInfo blue, + const MaskInfo alpha) + : fRed(red) + , fGreen(green) + , fBlue(blue) + , fAlpha(alpha) { } + + //Input bit masks format + struct InputMasks { + uint32_t red; + uint32_t green; + uint32_t blue; + uint32_t alpha; + }; + + // Create the masks object + static SkMasks* CreateMasks(InputMasks masks, int bytesPerPixel); + + // Get a color component + uint8_t getRed(uint32_t pixel) const; + uint8_t getGreen(uint32_t pixel) const; + uint8_t getBlue(uint32_t pixel) const; + uint8_t getAlpha(uint32_t pixel) const; + + // Getter for the alpha mask + // The alpha mask may be used in other decoding modes + uint32_t getAlphaMask() const { + return fAlpha.mask; + } + +private: + const MaskInfo fRed; + const MaskInfo fGreen; + const MaskInfo fBlue; + const MaskInfo fAlpha; +}; + +#endif diff --git a/gfx/skia/skia/src/codec/SkParseEncodedOrigin.cpp b/gfx/skia/skia/src/codec/SkParseEncodedOrigin.cpp new file mode 100644 index 0000000000..8d3d76a69f --- /dev/null +++ b/gfx/skia/skia/src/codec/SkParseEncodedOrigin.cpp @@ -0,0 +1,77 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/codec/SkEncodedOrigin.h" + +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" +#include "src/codec/SkCodecPriv.h" + +#include +#include +#include + +static bool parse_encoded_origin(const uint8_t* exifData, size_t data_length, uint64_t offset, + bool littleEndian, bool is_root, SkEncodedOrigin* orientation) { + // Require that the marker is at least large enough to contain the number of entries. + if (data_length < offset + 2) { + return false; + } + uint32_t numEntries = get_endian_short(exifData + offset, littleEndian); + + // Tag (2 bytes), Datatype (2 bytes), Number of elements (4 bytes), Data (4 bytes) + const uint32_t kEntrySize = 12; + const auto max = SkTo((data_length - offset - 2) / kEntrySize); + numEntries = std::min(numEntries, max); + + // Advance the data to the start of the entries. + auto data = exifData + offset + 2; + + const uint16_t kOriginTag = 0x112; + const uint16_t kOriginType = 3; + const uint16_t kSubIFDOffsetTag = 0x8769; + const uint16_t kSubIFDOffsetType = 4; + + for (uint32_t i = 0; i < numEntries; i++, data += kEntrySize) { + uint16_t tag = get_endian_short(data, littleEndian); + uint16_t type = get_endian_short(data + 2, littleEndian); + uint32_t count = get_endian_int(data + 4, littleEndian); + + if (kOriginTag == tag && kOriginType == type && 1 == count) { + uint16_t val = get_endian_short(data + 8, littleEndian); + if (0 < val && val <= kLast_SkEncodedOrigin) { + *orientation = (SkEncodedOrigin)val; + return true; + } + } else if (kSubIFDOffsetTag == tag && kSubIFDOffsetType == type && 1 == count && is_root) { + uint32_t subifd = get_endian_int(data + 8, littleEndian); + if (0 < subifd && subifd < data_length) { + if (parse_encoded_origin(exifData, data_length, subifd, littleEndian, false, + orientation)) { + return true; + } + } + } + } + + return false; +} + +bool SkParseEncodedOrigin(const uint8_t* data, size_t data_length, SkEncodedOrigin* orientation) { + SkASSERT(orientation); + bool littleEndian; + // We need eight bytes to read the endian marker and the offset, below. + if (data_length < 8 || !is_valid_endian_marker(data, &littleEndian)) { + return false; + } + + // Get the offset from the start of the marker. + // Though this only reads four bytes, use a larger int in case it overflows. + uint64_t offset = get_endian_int(data + 4, littleEndian); + + return parse_encoded_origin(data, data_length, offset, littleEndian, true, orientation); +} diff --git a/gfx/skia/skia/src/codec/SkParseEncodedOrigin.h b/gfx/skia/skia/src/codec/SkParseEncodedOrigin.h new file mode 100644 index 0000000000..4891557a19 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkParseEncodedOrigin.h @@ -0,0 +1,19 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkParseEncodedOrigin_DEFINED +#define SkParseEncodedOrigin_DEFINED + +#include "include/codec/SkEncodedOrigin.h" + +/** + * If |data| is an EXIF tag representing an SkEncodedOrigin, return true and set |out| + * appropriately. Otherwise return false. + */ +bool SkParseEncodedOrigin(const uint8_t* data, size_t data_length, SkEncodedOrigin* out); + +#endif // SkParseEncodedOrigin_DEFINED diff --git a/gfx/skia/skia/src/codec/SkPixmapUtils.cpp b/gfx/skia/skia/src/codec/SkPixmapUtils.cpp new file mode 100644 index 0000000000..9364ed4d7c --- /dev/null +++ b/gfx/skia/skia/src/codec/SkPixmapUtils.cpp @@ -0,0 +1,69 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/codec/SkPixmapUtils.h" + +#include "include/codec/SkEncodedOrigin.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkImage.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkSurface.h" + +#include + +static bool draw_orientation(const SkPixmap& dst, const SkPixmap& src, SkEncodedOrigin origin) { + auto surf = SkSurface::MakeRasterDirect(dst.info(), dst.writable_addr(), dst.rowBytes()); + if (!surf) { + return false; + } + + SkBitmap bm; + bm.installPixels(src); + + SkMatrix m = SkEncodedOriginToMatrix(origin, dst.width(), dst.height()); + + SkPaint p; + p.setBlendMode(SkBlendMode::kSrc); + surf->getCanvas()->concat(m); + surf->getCanvas()->drawImage(SkImage::MakeFromBitmap(bm), 0, 0, SkSamplingOptions(), &p); + return true; +} + +bool SkPixmapUtils::Orient(const SkPixmap& dst, const SkPixmap& src, SkEncodedOrigin origin) { + if (src.colorType() != dst.colorType()) { + return false; + } + // note: we just ignore alphaType and colorSpace for this transformation + + int w = src.width(); + int h = src.height(); + if (SkEncodedOriginSwapsWidthHeight(origin)) { + using std::swap; + swap(w, h); + } + if (dst.width() != w || dst.height() != h) { + return false; + } + if (w == 0 || h == 0) { + return true; + } + + // check for aliasing to self + if (src.addr() == dst.addr()) { + return kTopLeft_SkEncodedOrigin == origin; + } + return draw_orientation(dst, src, origin); +} + +SkImageInfo SkPixmapUtils::SwapWidthHeight(const SkImageInfo& info) { + return info.makeWH(info.height(), info.width()); +} diff --git a/gfx/skia/skia/src/codec/SkPixmapUtils.h b/gfx/skia/skia/src/codec/SkPixmapUtils.h new file mode 100644 index 0000000000..e438fbbe83 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkPixmapUtils.h @@ -0,0 +1,61 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPixmapUtils_DEFINED +#define SkPixmapUtils_DEFINED + +#include "include/codec/SkEncodedOrigin.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "src/core/SkAutoPixmapStorage.h" + +class SkPixmapUtils { +public: + /** + * Copy the pixels in this pixmap into dst, applying the orientation transformations specified + * by the flags. If the inputs are invalid, this returns false and no copy is made. + */ + static bool Orient(const SkPixmap& dst, const SkPixmap& src, SkEncodedOrigin); + + static SkImageInfo SwapWidthHeight(const SkImageInfo& info); + + /** + * Decode an image and then copy into dst, applying origin. + * + * @param dst SkPixmap to write the final image, after + * applying the origin. + * @param origin SkEncodedOrigin to apply to the raw pixels. + * @param decode Function for decoding into a pixmap without + * applying the origin. + */ + + template + static bool Orient(const SkPixmap& dst, SkEncodedOrigin origin, Fn&& decode) { + SkAutoPixmapStorage storage; + const SkPixmap* tmp = &dst; + if (origin != kTopLeft_SkEncodedOrigin) { + auto info = dst.info(); + if (SkEncodedOriginSwapsWidthHeight(origin)) { + info = SwapWidthHeight(info); + } + if (!storage.tryAlloc(info)) { + return false; + } + tmp = &storage; + } + if (!decode(*tmp)) { + return false; + } + if (tmp != &dst) { + return Orient(dst, *tmp, origin); + } + return true; + } + +}; + +#endif // SkPixmapUtils_DEFINED diff --git a/gfx/skia/skia/src/codec/SkSampler.cpp b/gfx/skia/skia/src/codec/SkSampler.cpp new file mode 100644 index 0000000000..3a6832c183 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkSampler.cpp @@ -0,0 +1,71 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/codec/SkSampler.h" + +#include "include/codec/SkCodec.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/private/base/SkTemplates.h" +#include "src/codec/SkCodecPriv.h" +#include "src/core/SkOpts.h" + +#include +#include + +void SkSampler::Fill(const SkImageInfo& info, void* dst, size_t rowBytes, + SkCodec::ZeroInitialized zeroInit) { + SkASSERT(dst != nullptr); + + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + return; + } + + const int width = info.width(); + const int numRows = info.height(); + + // Use the proper memset routine to fill the remaining bytes + switch (info.colorType()) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: { + uint32_t* dstRow = (uint32_t*) dst; + for (int row = 0; row < numRows; row++) { + SkOpts::memset32(dstRow, 0, width); + dstRow = SkTAddOffset(dstRow, rowBytes); + } + break; + } + case kRGB_565_SkColorType: { + uint16_t* dstRow = (uint16_t*) dst; + for (int row = 0; row < numRows; row++) { + SkOpts::memset16(dstRow, 0, width); + dstRow = SkTAddOffset(dstRow, rowBytes); + } + break; + } + case kGray_8_SkColorType: { + uint8_t* dstRow = (uint8_t*) dst; + for (int row = 0; row < numRows; row++) { + memset(dstRow, 0, width); + dstRow = SkTAddOffset(dstRow, rowBytes); + } + break; + } + case kRGBA_F16_SkColorType: { + uint64_t* dstRow = (uint64_t*) dst; + for (int row = 0; row < numRows; row++) { + SkOpts::memset64(dstRow, 0, width); + dstRow = SkTAddOffset(dstRow, rowBytes); + } + break; + } + default: + SkCodecPrintf("Error: Unsupported dst color type for fill(). Doing nothing.\n"); + SkASSERT(false); + break; + } +} diff --git a/gfx/skia/skia/src/codec/SkSampler.h b/gfx/skia/skia/src/codec/SkSampler.h new file mode 100644 index 0000000000..ac3b27c441 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkSampler.h @@ -0,0 +1,89 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkSampler_DEFINED +#define SkSampler_DEFINED + +#include "include/codec/SkCodec.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkNoncopyable.h" +#include "src/codec/SkCodecPriv.h" + +#include + +struct SkImageInfo; + +class SkSampler : public SkNoncopyable { +public: + /** + * Update the sampler to sample every sampleX'th pixel. Returns the + * width after sampling. + */ + int setSampleX(int sampleX) { + return this->onSetSampleX(sampleX); + } + + /** + * Update the sampler to sample every sampleY'th row. + */ + void setSampleY(int sampleY) { + fSampleY = sampleY; + } + + /** + * Retrieve the value set for sampleY. + */ + int sampleY() const { + return fSampleY; + } + + /** + * Based on fSampleY, return whether this row belongs in the output. + * + * @param row Row of the image, starting with the first row in the subset. + */ + bool rowNeeded(int row) const { + return (row - get_start_coord(fSampleY)) % fSampleY == 0; + } + + /** + * Fill the remainder of the destination with 0. + * + * 0 has a different meaning depending on the SkColorType. For color types + * with transparency, this means transparent. For k565 and kGray, 0 is + * black. + * + * @param info + * Contains the color type of the rows to fill. + * Contains the pixel width of the destination rows to fill + * Contains the number of rows that we need to fill. + * + * @param dst + * The destination row to fill. + * + * @param rowBytes + * Stride in bytes of the destination. + * + * @param zeroInit + * Indicates whether memory is already zero initialized. + */ + static void Fill(const SkImageInfo& info, void* dst, size_t rowBytes, + SkCodec::ZeroInitialized zeroInit); + + virtual int fillWidth() const = 0; + + SkSampler() + : fSampleY(1) + {} + + virtual ~SkSampler() {} +private: + int fSampleY; + + virtual int onSetSampleX(int) = 0; +}; + +#endif // SkSampler_DEFINED diff --git a/gfx/skia/skia/src/codec/SkSwizzler.cpp b/gfx/skia/skia/src/codec/SkSwizzler.cpp new file mode 100644 index 0000000000..d5a1ddbc89 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkSwizzler.cpp @@ -0,0 +1,1250 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/codec/SkSwizzler.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorPriv.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRect.h" +#include "include/private/SkColorData.h" +#include "include/private/SkEncodedInfo.h" +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkHalf.h" +#include "src/codec/SkCodecPriv.h" +#include "src/core/SkOpts.h" + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + #include "include/android/SkAndroidFrameworkUtils.h" +#endif + +#include + +static void copy(void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + memcpy(dst, src + offset, width * bpp); +} + +static void sample1(void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + src += offset; + uint8_t* dst8 = (uint8_t*) dst; + for (int x = 0; x < width; x++) { + dst8[x] = *src; + src += deltaSrc; + } +} + +static void sample2(void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + src += offset; + uint16_t* dst16 = (uint16_t*) dst; + for (int x = 0; x < width; x++) { + dst16[x] = *((const uint16_t*) src); + src += deltaSrc; + } +} + +static void sample4(void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + src += offset; + uint32_t* dst32 = (uint32_t*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = *((const uint32_t*) src); + src += deltaSrc; + } +} + +static void sample6(void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + src += offset; + uint8_t* dst8 = (uint8_t*) dst; + for (int x = 0; x < width; x++) { + memcpy(dst8, src, 6); + dst8 += 6; + src += deltaSrc; + } +} + +static void sample8(void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + src += offset; + uint64_t* dst64 = (uint64_t*) dst; + for (int x = 0; x < width; x++) { + dst64[x] = *((const uint64_t*) src); + src += deltaSrc; + } +} + +// kBit +// These routines exclusively choose between white and black + +#define GRAYSCALE_BLACK 0 +#define GRAYSCALE_WHITE 0xFF + + +// same as swizzle_bit_to_index and swizzle_bit_to_n32 except for value assigned to dst[x] +static void swizzle_bit_to_grayscale( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { + + uint8_t* SK_RESTRICT dst = (uint8_t*) dstRow; + + // increment src by byte offset and bitIndex by bit offset + src += offset / 8; + int bitIndex = offset % 8; + uint8_t currByte = *src; + + dst[0] = ((currByte >> (7-bitIndex)) & 1) ? GRAYSCALE_WHITE : GRAYSCALE_BLACK; + + for (int x = 1; x < dstWidth; x++) { + int bitOffset = bitIndex + deltaSrc; + bitIndex = bitOffset % 8; + currByte = *(src += bitOffset / 8); + dst[x] = ((currByte >> (7-bitIndex)) & 1) ? GRAYSCALE_WHITE : GRAYSCALE_BLACK; + } +} + +#undef GRAYSCALE_BLACK +#undef GRAYSCALE_WHITE + +// same as swizzle_bit_to_grayscale and swizzle_bit_to_index except for value assigned to dst[x] +static void swizzle_bit_to_n32( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { + SkPMColor* SK_RESTRICT dst = (SkPMColor*) dstRow; + + // increment src by byte offset and bitIndex by bit offset + src += offset / 8; + int bitIndex = offset % 8; + uint8_t currByte = *src; + + dst[0] = ((currByte >> (7 - bitIndex)) & 1) ? SK_ColorWHITE : SK_ColorBLACK; + + for (int x = 1; x < dstWidth; x++) { + int bitOffset = bitIndex + deltaSrc; + bitIndex = bitOffset % 8; + currByte = *(src += bitOffset / 8); + dst[x] = ((currByte >> (7 - bitIndex)) & 1) ? SK_ColorWHITE : SK_ColorBLACK; + } +} + +#define RGB565_BLACK 0 +#define RGB565_WHITE 0xFFFF + +static void swizzle_bit_to_565( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { + uint16_t* SK_RESTRICT dst = (uint16_t*) dstRow; + + // increment src by byte offset and bitIndex by bit offset + src += offset / 8; + int bitIndex = offset % 8; + uint8_t currByte = *src; + + dst[0] = ((currByte >> (7 - bitIndex)) & 1) ? RGB565_WHITE : RGB565_BLACK; + + for (int x = 1; x < dstWidth; x++) { + int bitOffset = bitIndex + deltaSrc; + bitIndex = bitOffset % 8; + currByte = *(src += bitOffset / 8); + dst[x] = ((currByte >> (7 - bitIndex)) & 1) ? RGB565_WHITE : RGB565_BLACK; + } +} + +#undef RGB565_BLACK +#undef RGB565_WHITE + +static void swizzle_bit_to_f16( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor* /*ctable*/) { + constexpr uint64_t kWhite = (((uint64_t) SK_Half1) << 0) | + (((uint64_t) SK_Half1) << 16) | + (((uint64_t) SK_Half1) << 32) | + (((uint64_t) SK_Half1) << 48); + constexpr uint64_t kBlack = (((uint64_t) 0) << 0) | + (((uint64_t) 0) << 16) | + (((uint64_t) 0) << 32) | + (((uint64_t) SK_Half1) << 48); + + uint64_t* SK_RESTRICT dst = (uint64_t*) dstRow; + + // increment src by byte offset and bitIndex by bit offset + src += offset / 8; + int bitIndex = offset % 8; + uint8_t currByte = *src; + + dst[0] = ((currByte >> (7 - bitIndex)) & 1) ? kWhite : kBlack; + + for (int x = 1; x < dstWidth; x++) { + int bitOffset = bitIndex + deltaSrc; + bitIndex = bitOffset % 8; + currByte = *(src += bitOffset / 8); + dst[x] = ((currByte >> (7 - bitIndex)) & 1) ? kWhite : kBlack; + } +} + +// kIndex1, kIndex2, kIndex4 + +static void swizzle_small_index_to_565( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + uint16_t* dst = (uint16_t*) dstRow; + src += offset / 8; + int bitIndex = offset % 8; + uint8_t currByte = *src; + const uint8_t mask = (1 << bpp) - 1; + uint8_t index = (currByte >> (8 - bpp - bitIndex)) & mask; + dst[0] = SkPixel32ToPixel16(ctable[index]); + + for (int x = 1; x < dstWidth; x++) { + int bitOffset = bitIndex + deltaSrc; + bitIndex = bitOffset % 8; + currByte = *(src += bitOffset / 8); + index = (currByte >> (8 - bpp - bitIndex)) & mask; + dst[x] = SkPixel32ToPixel16(ctable[index]); + } +} + +static void swizzle_small_index_to_n32( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + SkPMColor* dst = (SkPMColor*) dstRow; + src += offset / 8; + int bitIndex = offset % 8; + uint8_t currByte = *src; + const uint8_t mask = (1 << bpp) - 1; + uint8_t index = (currByte >> (8 - bpp - bitIndex)) & mask; + dst[0] = ctable[index]; + + for (int x = 1; x < dstWidth; x++) { + int bitOffset = bitIndex + deltaSrc; + bitIndex = bitOffset % 8; + currByte = *(src += bitOffset / 8); + index = (currByte >> (8 - bpp - bitIndex)) & mask; + dst[x] = ctable[index]; + } +} + +// kIndex + +static void swizzle_index_to_n32( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + SkPMColor c = ctable[*src]; + dst[x] = c; + src += deltaSrc; + } +} + +static void swizzle_index_to_n32_skipZ( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + SkPMColor c = ctable[*src]; + if (c != 0) { + dst[x] = c; + } + src += deltaSrc; + } +} + +static void swizzle_index_to_565( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bytesPerPixel, int deltaSrc, int offset, const SkPMColor ctable[]) { + src += offset; + uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = SkPixel32ToPixel16(ctable[*src]); + src += deltaSrc; + } +} + +// kGray + +static void swizzle_gray_to_n32( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = SkPackARGB32NoCheck(0xFF, *src, *src, *src); + src += deltaSrc; + } +} + +static void fast_swizzle_gray_to_n32( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + // Note that there is no need to distinguish between RGB and BGR. + // Each color channel will get the same value. + SkOpts::gray_to_RGB1((uint32_t*) dst, src + offset, width); +} + +static void swizzle_gray_to_565( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bytesPerPixel, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = SkPack888ToRGB16(src[0], src[0], src[0]); + src += deltaSrc; + } +} + +// kGrayAlpha + +static void swizzle_grayalpha_to_n32_unpremul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + src += offset; + SkPMColor* dst32 = (SkPMColor*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = SkPackARGB32NoCheck(src[1], src[0], src[0], src[0]); + src += deltaSrc; + } +} + +static void fast_swizzle_grayalpha_to_n32_unpremul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + // Note that there is no need to distinguish between RGB and BGR. + // Each color channel will get the same value. + SkOpts::grayA_to_RGBA((uint32_t*) dst, src + offset, width); +} + +static void swizzle_grayalpha_to_n32_premul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + src += offset; + SkPMColor* dst32 = (SkPMColor*) dst; + for (int x = 0; x < width; x++) { + uint8_t pmgray = SkMulDiv255Round(src[1], src[0]); + dst32[x] = SkPackARGB32NoCheck(src[1], pmgray, pmgray, pmgray); + src += deltaSrc; + } +} + +static void fast_swizzle_grayalpha_to_n32_premul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + // Note that there is no need to distinguish between rgb and bgr. + // Each color channel will get the same value. + SkOpts::grayA_to_rgbA((uint32_t*) dst, src + offset, width); +} + +static void swizzle_grayalpha_to_a8(void* dst, const uint8_t* src, int width, int bpp, + int deltaSrc, int offset, const SkPMColor[]) { + src += offset; + uint8_t* dst8 = (uint8_t*)dst; + for (int x = 0; x < width; ++x) { + dst8[x] = src[1]; // src[0] is gray, ignored + src += deltaSrc; + } +} + +// kBGR + +static void swizzle_bgr_to_565( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = SkPack888ToRGB16(src[2], src[1], src[0]); + src += deltaSrc; + } +} + +// kRGB + +static void swizzle_rgb_to_rgba( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = SkPackARGB_as_RGBA(0xFF, src[0], src[1], src[2]); + src += deltaSrc; + } +} + +static void swizzle_rgb_to_bgra( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = SkPackARGB_as_BGRA(0xFF, src[0], src[1], src[2]); + src += deltaSrc; + } +} + +static void fast_swizzle_rgb_to_rgba( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, + int offset, const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + SkOpts::RGB_to_RGB1((uint32_t*) dst, src + offset, width); +} + +static void fast_swizzle_rgb_to_bgra( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, + int offset, const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + SkOpts::RGB_to_BGR1((uint32_t*) dst, src + offset, width); +} + +static void swizzle_rgb_to_565( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bytesPerPixel, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = SkPack888ToRGB16(src[0], src[1], src[2]); + src += deltaSrc; + } +} + +// kRGBA + +static void swizzle_rgba_to_rgba_premul( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = premultiply_argb_as_rgba(src[3], src[0], src[1], src[2]); + src += deltaSrc; + } +} + +static void swizzle_rgba_to_bgra_premul( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + dst[x] = premultiply_argb_as_bgra(src[3], src[0], src[1], src[2]); + src += deltaSrc; + } +} + +static void fast_swizzle_rgba_to_rgba_premul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, + int offset, const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + SkOpts::RGBA_to_rgbA((uint32_t*) dst, (const uint32_t*)(src + offset), width); +} + +static void fast_swizzle_rgba_to_bgra_premul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, + int offset, const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + SkOpts::RGBA_to_bgrA((uint32_t*) dst, (const uint32_t*)(src + offset), width); +} + +static void swizzle_rgba_to_bgra_unpremul( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + uint32_t* SK_RESTRICT dst = reinterpret_cast(dstRow); + for (int x = 0; x < dstWidth; x++) { + unsigned alpha = src[3]; + dst[x] = SkPackARGB_as_BGRA(alpha, src[0], src[1], src[2]); + src += deltaSrc; + } +} + +static void fast_swizzle_rgba_to_bgra_unpremul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + SkOpts::RGBA_to_BGRA((uint32_t*) dst, (const uint32_t*)(src + offset), width); +} + +// 16-bits per component kRGB and kRGBA + +static void swizzle_rgb16_to_rgba( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + auto strip16to8 = [](const uint8_t* ptr) { + return 0xFF000000 | (ptr[4] << 16) | (ptr[2] << 8) | ptr[0]; + }; + + src += offset; + uint32_t* dst32 = (uint32_t*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = strip16to8(src); + src += deltaSrc; + } +} + +static void swizzle_rgb16_to_bgra( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + auto strip16to8 = [](const uint8_t* ptr) { + return 0xFF000000 | (ptr[0] << 16) | (ptr[2] << 8) | ptr[4]; + }; + + src += offset; + uint32_t* dst32 = (uint32_t*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = strip16to8(src); + src += deltaSrc; + } +} + +static void swizzle_rgb16_to_565( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + auto strip16to565 = [](const uint8_t* ptr) { + return SkPack888ToRGB16(ptr[0], ptr[2], ptr[4]); + }; + + src += offset; + uint16_t* dst16 = (uint16_t*) dst; + for (int x = 0; x < width; x++) { + dst16[x] = strip16to565(src); + src += deltaSrc; + } +} + +static void swizzle_rgba16_to_rgba_unpremul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + auto strip16to8 = [](const uint8_t* ptr) { + return (ptr[6] << 24) | (ptr[4] << 16) | (ptr[2] << 8) | ptr[0]; + }; + + src += offset; + uint32_t* dst32 = (uint32_t*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = strip16to8(src); + src += deltaSrc; + } +} + +static void swizzle_rgba16_to_rgba_premul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + auto stripAndPremul16to8 = [](const uint8_t* ptr) { + return premultiply_argb_as_rgba(ptr[6], ptr[0], ptr[2], ptr[4]); + }; + + src += offset; + uint32_t* dst32 = (uint32_t*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = stripAndPremul16to8(src); + src += deltaSrc; + } +} + +static void swizzle_rgba16_to_bgra_unpremul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + auto strip16to8 = [](const uint8_t* ptr) { + return (ptr[6] << 24) | (ptr[0] << 16) | (ptr[2] << 8) | ptr[4]; + }; + + src += offset; + uint32_t* dst32 = (uint32_t*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = strip16to8(src); + src += deltaSrc; + } +} + +static void swizzle_rgba16_to_bgra_premul( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + auto stripAndPremul16to8 = [](const uint8_t* ptr) { + return premultiply_argb_as_bgra(ptr[6], ptr[0], ptr[2], ptr[4]); + }; + + src += offset; + uint32_t* dst32 = (uint32_t*) dst; + for (int x = 0; x < width; x++) { + dst32[x] = stripAndPremul16to8(src); + src += deltaSrc; + } +} + +// kCMYK +// +// CMYK is stored as four bytes per pixel. +// +// We will implement a crude conversion from CMYK -> RGB using formulas +// from easyrgb.com. +// +// CMYK -> CMY +// C = C * (1 - K) + K +// M = M * (1 - K) + K +// Y = Y * (1 - K) + K +// +// libjpeg actually gives us inverted CMYK, so we must subtract the +// original terms from 1. +// CMYK -> CMY +// C = (1 - C) * (1 - (1 - K)) + (1 - K) +// M = (1 - M) * (1 - (1 - K)) + (1 - K) +// Y = (1 - Y) * (1 - (1 - K)) + (1 - K) +// +// Simplifying the above expression. +// CMYK -> CMY +// C = 1 - CK +// M = 1 - MK +// Y = 1 - YK +// +// CMY -> RGB +// R = (1 - C) * 255 +// G = (1 - M) * 255 +// B = (1 - Y) * 255 +// +// Therefore the full conversion is below. This can be verified at +// www.rapidtables.com (assuming inverted CMYK). +// CMYK -> RGB +// R = C * K * 255 +// G = M * K * 255 +// B = Y * K * 255 +// +// As a final note, we have treated the CMYK values as if they were on +// a scale from 0-1, when in fact they are 8-bit ints scaling from 0-255. +// We must divide each CMYK component by 255 to obtain the true conversion +// we should perform. +// CMYK -> RGB +// R = C * K / 255 +// G = M * K / 255 +// B = Y * K / 255 +static void swizzle_cmyk_to_rgba( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + const uint8_t r = SkMulDiv255Round(src[0], src[3]); + const uint8_t g = SkMulDiv255Round(src[1], src[3]); + const uint8_t b = SkMulDiv255Round(src[2], src[3]); + + dst[x] = SkPackARGB_as_RGBA(0xFF, r, g, b); + src += deltaSrc; + } +} + +static void swizzle_cmyk_to_bgra( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + SkPMColor* SK_RESTRICT dst = (SkPMColor*)dstRow; + for (int x = 0; x < dstWidth; x++) { + const uint8_t r = SkMulDiv255Round(src[0], src[3]); + const uint8_t g = SkMulDiv255Round(src[1], src[3]); + const uint8_t b = SkMulDiv255Round(src[2], src[3]); + + dst[x] = SkPackARGB_as_BGRA(0xFF, r, g, b); + src += deltaSrc; + } +} + +static void fast_swizzle_cmyk_to_rgba( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + SkOpts::inverted_CMYK_to_RGB1((uint32_t*) dst, (const uint32_t*)(src + offset), width); +} + +static void fast_swizzle_cmyk_to_bgra( + void* dst, const uint8_t* src, int width, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]) { + + // This function must not be called if we are sampling. If we are not + // sampling, deltaSrc should equal bpp. + SkASSERT(deltaSrc == bpp); + + SkOpts::inverted_CMYK_to_BGR1((uint32_t*) dst, (const uint32_t*)(src + offset), width); +} + +static void swizzle_cmyk_to_565( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + + src += offset; + uint16_t* SK_RESTRICT dst = (uint16_t*)dstRow; + for (int x = 0; x < dstWidth; x++) { + const uint8_t r = SkMulDiv255Round(src[0], src[3]); + const uint8_t g = SkMulDiv255Round(src[1], src[3]); + const uint8_t b = SkMulDiv255Round(src[2], src[3]); + + dst[x] = SkPack888ToRGB16(r, g, b); + src += deltaSrc; + } +} + +template +void SkSwizzler::SkipLeadingGrayAlphaZerosThen( + void* dst, const uint8_t* src, int width, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + SkASSERT(!ctable); + + const uint16_t* src16 = (const uint16_t*) (src + offset); + uint32_t* dst32 = (uint32_t*) dst; + + // This may miss opportunities to skip when the output is premultiplied, + // e.g. for a src pixel 0x00FF which is not zero but becomes zero after premultiplication. + while (width > 0 && *src16 == 0x0000) { + width--; + dst32++; + src16 += deltaSrc / 2; + } + proc(dst32, (const uint8_t*)src16, width, bpp, deltaSrc, 0, ctable); +} + +template +void SkSwizzler::SkipLeading8888ZerosThen( + void* SK_RESTRICT dstRow, const uint8_t* SK_RESTRICT src, int dstWidth, + int bpp, int deltaSrc, int offset, const SkPMColor ctable[]) { + SkASSERT(!ctable); + + auto src32 = (const uint32_t*)(src+offset); + auto dst32 = (uint32_t*)dstRow; + + // This may miss opportunities to skip when the output is premultiplied, + // e.g. for a src pixel 0x00FFFFFF which is not zero but becomes zero after premultiplication. + while (dstWidth > 0 && *src32 == 0x00000000) { + dstWidth--; + dst32++; + src32 += deltaSrc/4; + } + proc(dst32, (const uint8_t*)src32, dstWidth, bpp, deltaSrc, 0, ctable); +} + +std::unique_ptr SkSwizzler::MakeSimple(int srcBPP, const SkImageInfo& dstInfo, + const SkCodec::Options& options) { + RowProc proc = nullptr; + switch (srcBPP) { + case 1: // kGray_8_SkColorType + proc = &sample1; + break; + case 2: // kRGB_565_SkColorType + proc = &sample2; + break; + case 4: // kRGBA_8888_SkColorType + // kBGRA_8888_SkColorType + // kRGBA_1010102_SkColorType + proc = &sample4; + break; + case 6: // 16 bit PNG no alpha + proc = &sample6; + break; + case 8: // 16 bit PNG with alpha + proc = &sample8; + break; + default: + return nullptr; + } + + return Make(dstInfo, ©, proc, nullptr /*ctable*/, srcBPP, + dstInfo.bytesPerPixel(), options, nullptr /*frame*/); +} + +std::unique_ptr SkSwizzler::Make(const SkEncodedInfo& encodedInfo, + const SkPMColor* ctable, + const SkImageInfo& dstInfo, + const SkCodec::Options& options, + const SkIRect* frame) { + if (SkEncodedInfo::kPalette_Color == encodedInfo.color() && nullptr == ctable) { + return nullptr; + } + + RowProc fastProc = nullptr; + RowProc proc = nullptr; + SkCodec::ZeroInitialized zeroInit = options.fZeroInitialized; + const bool premultiply = (SkEncodedInfo::kOpaque_Alpha != encodedInfo.alpha()) && + (kPremul_SkAlphaType == dstInfo.alphaType()); + + switch (encodedInfo.color()) { + case SkEncodedInfo::kGray_Color: + switch (encodedInfo.bitsPerComponent()) { + case 1: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + proc = &swizzle_bit_to_n32; + break; + case kRGB_565_SkColorType: + proc = &swizzle_bit_to_565; + break; + case kGray_8_SkColorType: + proc = &swizzle_bit_to_grayscale; + break; + case kRGBA_F16_SkColorType: + proc = &swizzle_bit_to_f16; + break; + default: + return nullptr; + } + break; + case 8: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + proc = &swizzle_gray_to_n32; + fastProc = &fast_swizzle_gray_to_n32; + break; + case kGray_8_SkColorType: + proc = &sample1; + fastProc = © + break; + case kRGB_565_SkColorType: + proc = &swizzle_gray_to_565; + break; + default: + return nullptr; + } + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::kXAlpha_Color: + case SkEncodedInfo::kGrayAlpha_Color: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + if (premultiply) { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeadingGrayAlphaZerosThen + ; + fastProc = &SkipLeadingGrayAlphaZerosThen + ; + } else { + proc = &swizzle_grayalpha_to_n32_premul; + fastProc = &fast_swizzle_grayalpha_to_n32_premul; + } + } else { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeadingGrayAlphaZerosThen + ; + fastProc = &SkipLeadingGrayAlphaZerosThen + ; + } else { + proc = &swizzle_grayalpha_to_n32_unpremul; + fastProc = &fast_swizzle_grayalpha_to_n32_unpremul; + } + } + break; + case kAlpha_8_SkColorType: + proc = &swizzle_grayalpha_to_a8; + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::kPalette_Color: + // We assume that the color table is premultiplied and swizzled + // as desired. + switch (encodedInfo.bitsPerComponent()) { + case 1: + case 2: + case 4: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + proc = &swizzle_small_index_to_n32; + break; + case kRGB_565_SkColorType: + proc = &swizzle_small_index_to_565; + break; + default: + return nullptr; + } + break; + case 8: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &swizzle_index_to_n32_skipZ; + } else { + proc = &swizzle_index_to_n32; + } + break; + case kRGB_565_SkColorType: + proc = &swizzle_index_to_565; + break; + default: + return nullptr; + } + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::k565_Color: + // Treat 565 exactly like RGB (since it's still encoded as 8 bits per component). + // We just mark as 565 when we have a hint that there are only 5/6/5 "significant" + // bits in each channel. + case SkEncodedInfo::kRGB_Color: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + if (16 == encodedInfo.bitsPerComponent()) { + proc = &swizzle_rgb16_to_rgba; + break; + } + + SkASSERT(8 == encodedInfo.bitsPerComponent()); + proc = &swizzle_rgb_to_rgba; + fastProc = &fast_swizzle_rgb_to_rgba; + break; + case kBGRA_8888_SkColorType: + if (16 == encodedInfo.bitsPerComponent()) { + proc = &swizzle_rgb16_to_bgra; + break; + } + + SkASSERT(8 == encodedInfo.bitsPerComponent()); + proc = &swizzle_rgb_to_bgra; + fastProc = &fast_swizzle_rgb_to_bgra; + break; + case kRGB_565_SkColorType: + if (16 == encodedInfo.bitsPerComponent()) { + proc = &swizzle_rgb16_to_565; + break; + } + + proc = &swizzle_rgb_to_565; + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::kRGBA_Color: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + if (16 == encodedInfo.bitsPerComponent()) { + proc = premultiply ? &swizzle_rgba16_to_rgba_premul : + &swizzle_rgba16_to_rgba_unpremul; + break; + } + + SkASSERT(8 == encodedInfo.bitsPerComponent()); + if (premultiply) { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen + ; + } else { + proc = &swizzle_rgba_to_rgba_premul; + fastProc = &fast_swizzle_rgba_to_rgba_premul; + } + } else { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen; + } else { + proc = &sample4; + fastProc = © + } + } + break; + case kBGRA_8888_SkColorType: + if (16 == encodedInfo.bitsPerComponent()) { + proc = premultiply ? &swizzle_rgba16_to_bgra_premul : + &swizzle_rgba16_to_bgra_unpremul; + break; + } + + SkASSERT(8 == encodedInfo.bitsPerComponent()); + if (premultiply) { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen + ; + } else { + proc = &swizzle_rgba_to_bgra_premul; + fastProc = &fast_swizzle_rgba_to_bgra_premul; + } + } else { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen + ; + } else { + proc = &swizzle_rgba_to_bgra_unpremul; + fastProc = &fast_swizzle_rgba_to_bgra_unpremul; + } + } + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::kBGR_Color: + switch (dstInfo.colorType()) { + case kBGRA_8888_SkColorType: + proc = &swizzle_rgb_to_rgba; + fastProc = &fast_swizzle_rgb_to_rgba; + break; + case kRGBA_8888_SkColorType: + proc = &swizzle_rgb_to_bgra; + fastProc = &fast_swizzle_rgb_to_bgra; + break; + case kRGB_565_SkColorType: + proc = &swizzle_bgr_to_565; + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::kBGRX_Color: + switch (dstInfo.colorType()) { + case kBGRA_8888_SkColorType: + proc = &swizzle_rgb_to_rgba; + break; + case kRGBA_8888_SkColorType: + proc = &swizzle_rgb_to_bgra; + break; + case kRGB_565_SkColorType: + proc = &swizzle_bgr_to_565; + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::kBGRA_Color: + switch (dstInfo.colorType()) { + case kBGRA_8888_SkColorType: + if (premultiply) { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen + ; + } else { + proc = &swizzle_rgba_to_rgba_premul; + fastProc = &fast_swizzle_rgba_to_rgba_premul; + } + } else { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen; + } else { + proc = &sample4; + fastProc = © + } + } + break; + case kRGBA_8888_SkColorType: + if (premultiply) { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen + ; + } else { + proc = &swizzle_rgba_to_bgra_premul; + fastProc = &fast_swizzle_rgba_to_bgra_premul; + } + } else { + if (SkCodec::kYes_ZeroInitialized == zeroInit) { + proc = &SkipLeading8888ZerosThen; + fastProc = &SkipLeading8888ZerosThen + ; + } else { + proc = &swizzle_rgba_to_bgra_unpremul; + fastProc = &fast_swizzle_rgba_to_bgra_unpremul; + } + } + break; + default: + return nullptr; + } + break; + case SkEncodedInfo::kInvertedCMYK_Color: + switch (dstInfo.colorType()) { + case kRGBA_8888_SkColorType: + proc = &swizzle_cmyk_to_rgba; + fastProc = &fast_swizzle_cmyk_to_rgba; + break; + case kBGRA_8888_SkColorType: + proc = &swizzle_cmyk_to_bgra; + fastProc = &fast_swizzle_cmyk_to_bgra; + break; + case kRGB_565_SkColorType: + proc = &swizzle_cmyk_to_565; + break; + default: + return nullptr; + } + break; + default: + return nullptr; + } + + // Store bpp in bytes if it is an even multiple, otherwise use bits + uint8_t bitsPerPixel = encodedInfo.bitsPerPixel(); + int srcBPP = SkIsAlign8(bitsPerPixel) ? bitsPerPixel / 8 : bitsPerPixel; + int dstBPP = dstInfo.bytesPerPixel(); + return Make(dstInfo, fastProc, proc, ctable, srcBPP, dstBPP, options, frame); +} + +std::unique_ptr SkSwizzler::Make(const SkImageInfo& dstInfo, + RowProc fastProc, RowProc proc, const SkPMColor* ctable, int srcBPP, + int dstBPP, const SkCodec::Options& options, const SkIRect* frame) { + int srcOffset = 0; + int srcWidth = dstInfo.width(); + int dstOffset = 0; + int dstWidth = srcWidth; + if (options.fSubset) { + // We do not currently support subset decodes for image types that may have + // frames (gif). + SkASSERT(!frame); + srcOffset = options.fSubset->left(); + srcWidth = options.fSubset->width(); + dstWidth = srcWidth; + } else if (frame) { + dstOffset = frame->left(); + srcWidth = frame->width(); + } + + return std::unique_ptr(new SkSwizzler(fastProc, proc, ctable, srcOffset, srcWidth, + dstOffset, dstWidth, srcBPP, dstBPP)); +} + +SkSwizzler::SkSwizzler(RowProc fastProc, RowProc proc, const SkPMColor* ctable, int srcOffset, + int srcWidth, int dstOffset, int dstWidth, int srcBPP, int dstBPP) + : fFastProc(fastProc) + , fSlowProc(proc) + , fActualProc(fFastProc ? fFastProc : fSlowProc) + , fColorTable(ctable) + , fSrcOffset(srcOffset) + , fDstOffset(dstOffset) + , fSrcOffsetUnits(srcOffset * srcBPP) + , fDstOffsetBytes(dstOffset * dstBPP) + , fSrcWidth(srcWidth) + , fDstWidth(dstWidth) + , fSwizzleWidth(srcWidth) + , fAllocatedWidth(dstWidth) + , fSampleX(1) + , fSrcBPP(srcBPP) + , fDstBPP(dstBPP) +{} + +int SkSwizzler::onSetSampleX(int sampleX) { + SkASSERT(sampleX > 0); + + fSampleX = sampleX; + fDstOffsetBytes = (fDstOffset / sampleX) * fDstBPP; + fSwizzleWidth = get_scaled_dimension(fSrcWidth, sampleX); + fAllocatedWidth = get_scaled_dimension(fDstWidth, sampleX); + + int frameSampleX = sampleX; + if (fSrcWidth < fDstWidth) { + // Although SkSampledCodec adjusted sampleX so that it will never be + // larger than the width of the image (or subset, if applicable), it + // doesn't account for the width of a subset frame (i.e. gif). As a + // result, get_start_coord(sampleX) could result in fSrcOffsetUnits + // being wider than fSrcWidth. Compute a sampling rate based on the + // frame width to ensure that fSrcOffsetUnits is sensible. + frameSampleX = fSrcWidth / fSwizzleWidth; + } + fSrcOffsetUnits = (get_start_coord(frameSampleX) + fSrcOffset) * fSrcBPP; + + if (fDstOffsetBytes > 0) { + const size_t dstSwizzleBytes = fSwizzleWidth * fDstBPP; + const size_t dstAllocatedBytes = fAllocatedWidth * fDstBPP; + if (fDstOffsetBytes + dstSwizzleBytes > dstAllocatedBytes) { +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + SkAndroidFrameworkUtils::SafetyNetLog("118143775"); +#endif + SkASSERT(dstSwizzleBytes <= dstAllocatedBytes); + fDstOffsetBytes = dstAllocatedBytes - dstSwizzleBytes; + } + } + + // The optimized swizzler functions do not support sampling. Sampled swizzles + // are already fast because they skip pixels. We haven't seen a situation + // where speeding up sampling has a significant impact on total decode time. + if (1 == fSampleX && fFastProc) { + fActualProc = fFastProc; + } else { + fActualProc = fSlowProc; + } + + return fAllocatedWidth; +} + +void SkSwizzler::swizzle(void* dst, const uint8_t* SK_RESTRICT src) { + SkASSERT(nullptr != dst && nullptr != src); + fActualProc(SkTAddOffset(dst, fDstOffsetBytes), src, fSwizzleWidth, fSrcBPP, + fSampleX * fSrcBPP, fSrcOffsetUnits, fColorTable); +} diff --git a/gfx/skia/skia/src/codec/SkSwizzler.h b/gfx/skia/skia/src/codec/SkSwizzler.h new file mode 100644 index 0000000000..e048bee3c8 --- /dev/null +++ b/gfx/skia/skia/src/codec/SkSwizzler.h @@ -0,0 +1,230 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSwizzler_DEFINED +#define SkSwizzler_DEFINED + +#include "include/codec/SkCodec.h" +#include "include/core/SkColor.h" +#include "include/core/SkTypes.h" +#include "src/codec/SkSampler.h" + +#include +#include +#include + +struct SkEncodedInfo; +struct SkIRect; +struct SkImageInfo; + +class SkSwizzler : public SkSampler { +public: + /** + * Create a new SkSwizzler. + * @param encodedInfo Description of the format of the encoded data. + * @param ctable Unowned pointer to an array of up to 256 colors for an + * index source. + * @param dstInfo Describes the destination. + * @param options Contains partial scanline information and whether the dst is zero- + * initialized. + * @param frame Is non-NULL if the source pixels are part of an image + * frame that is a subset of the full image. + * + * Note that a deeper discussion of partial scanline subsets and image frame + * subsets is below. Currently, we do not support both simultaneously. If + * options->fSubset is non-NULL, frame must be NULL. + * + * @return A new SkSwizzler or nullptr on failure. + */ + static std::unique_ptr Make(const SkEncodedInfo& encodedInfo, + const SkPMColor* ctable, const SkImageInfo& dstInfo, const SkCodec::Options&, + const SkIRect* frame = nullptr); + + /** + * Create a simplified swizzler that does not need to do format conversion. The swizzler + * only needs to sample and/or subset. + * + * @param srcBPP Bytes per pixel of the source. + * @param dstInfo Describes the destination. + * @param options Contains partial scanline information and whether the dst is zero- + * initialized. + * @return A new SkSwizzler or nullptr on failure. + */ + static std::unique_ptr MakeSimple(int srcBPP, const SkImageInfo& dstInfo, + const SkCodec::Options&); + + /** + * Swizzle a line. Generally this will be called height times, once + * for each row of source. + * By allowing the caller to pass in the dst pointer, we give the caller + * flexibility to use the swizzler even when the encoded data does not + * store the rows in order. This also improves usability for scaled and + * subset decodes. + * @param dst Where we write the output. + * @param src The next row of the source data. + */ + void swizzle(void* dst, const uint8_t* SK_RESTRICT src); + + int fillWidth() const override { + return fAllocatedWidth; + } + + /** + * If fSampleX > 1, the swizzler is sampling every fSampleX'th pixel and + * discarding the rest. + * + * This getter is currently used by SkBmpStandardCodec for Bmp-in-Ico decodes. + * Ideally, the subclasses of SkCodec would have no knowledge of sampling, but + * this allows us to apply a transparency mask to pixels after swizzling. + */ + int sampleX() const { return fSampleX; } + + /** + * Returns the actual number of pixels written to destination memory, taking + * scaling, subsetting, and partial frames into account. + */ + int swizzleWidth() const { return fSwizzleWidth; } + + /** + * Returns the byte offset at which we write to destination memory, taking + * scaling, subsetting, and partial frames into account. + */ + size_t swizzleOffsetBytes() const { return fDstOffsetBytes; } + +private: + + /** + * Method for converting raw data to Skia pixels. + * @param dstRow Row in which to write the resulting pixels. + * @param src Row of src data, in format specified by SrcConfig + * @param dstWidth Width in pixels of the destination + * @param bpp if bitsPerPixel % 8 == 0, deltaSrc is bytesPerPixel + * else, deltaSrc is bitsPerPixel + * @param deltaSrc bpp * sampleX + * @param ctable Colors (used for kIndex source). + * @param offset The offset before the first pixel to sample. + Is in bytes or bits based on what deltaSrc is in. + */ + typedef void (*RowProc)(void* SK_RESTRICT dstRow, + const uint8_t* SK_RESTRICT src, + int dstWidth, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]); + + template + static void SkipLeading8888ZerosThen(void* SK_RESTRICT dstRow, + const uint8_t* SK_RESTRICT src, + int dstWidth, int bpp, int deltaSrc, int offset, + const SkPMColor ctable[]); + + template + static void SkipLeadingGrayAlphaZerosThen(void* dst, const uint8_t* src, int width, int bpp, + int deltaSrc, int offset, const SkPMColor ctable[]); + + // May be NULL. We have not implemented optimized functions for all supported transforms. + const RowProc fFastProc; + // Always non-NULL. Supports sampling. + const RowProc fSlowProc; + // The actual RowProc we are using. This depends on if fFastProc is non-NULL and + // whether or not we are sampling. + RowProc fActualProc; + + const SkPMColor* fColorTable; // Unowned pointer + + // Subset Swizzles + // There are two types of subset swizzles that we support. We do not + // support both at the same time. + // TODO: If we want to support partial scanlines for gifs (which may + // use frame subsets), we will need to support both subsetting + // modes at the same time. + // (1) Partial Scanlines + // The client only wants to write a subset of the source pixels + // to the destination. This subset is specified to CreateSwizzler + // using options->fSubset. We will store subset information in + // the following fields. + // + // fSrcOffset: The starting pixel of the source. + // fSrcOffsetUnits: Derived from fSrcOffset with two key + // differences: + // (1) This takes the size of source pixels into + // account by multiplying by fSrcBPP. This may + // be measured in bits or bytes depending on + // which is natural for the SrcConfig. + // (2) If we are sampling, this will be larger + // than fSrcOffset * fSrcBPP, since sampling + // implies that we will skip some pixels. + // fDstOffset: Will be zero. There is no destination offset + // for this type of subset. + // fDstOffsetBytes: Will be zero. + // fSrcWidth: The width of the desired subset of source + // pixels, before any sampling is performed. + // fDstWidth: Will be equal to fSrcWidth, since this is also + // calculated before any sampling is performed. + // For this type of subset, the destination width + // matches the desired subset of the source. + // fSwizzleWidth: The actual number of pixels that will be + // written by the RowProc. This is a scaled + // version of fSrcWidth/fDstWidth. + // fAllocatedWidth: Will be equal to fSwizzleWidth. For this type + // of subset, the number of pixels written is the + // same as the actual width of the destination. + // (2) Frame Subset + // The client will decode the entire width of the source into a + // subset of destination memory. This subset is specified to + // CreateSwizzler in the "frame" parameter. We store subset + // information in the following fields. + // + // fSrcOffset: Will be zero. The starting pixel of the source. + // fSrcOffsetUnits: Will only be non-zero if we are sampling, + // since sampling implies that we will skip some + // pixels. Note that this is measured in bits + // or bytes depending on which is natural for + // SrcConfig. + // fDstOffset: First pixel to write in destination. + // fDstOffsetBytes: fDstOffset * fDstBPP. + // fSrcWidth: The entire width of the source pixels, before + // any sampling is performed. + // fDstWidth: The entire width of the destination memory, + // before any sampling is performed. + // fSwizzleWidth: The actual number of pixels that will be + // written by the RowProc. This is a scaled + // version of fSrcWidth. + // fAllocatedWidth: The actual number of pixels in destination + // memory. This is a scaled version of + // fDstWidth. + // + // If we are not subsetting, these fields are more straightforward. + // fSrcOffset = fDstOffet = fDstOffsetBytes = 0 + // fSrcOffsetUnits may be non-zero (we will skip the first few pixels when sampling) + // fSrcWidth = fDstWidth = Full original width + // fSwizzleWidth = fAllcoatedWidth = Scaled width (if we are sampling) + const int fSrcOffset; + const int fDstOffset; + int fSrcOffsetUnits; + int fDstOffsetBytes; + const int fSrcWidth; + const int fDstWidth; + int fSwizzleWidth; + int fAllocatedWidth; + + int fSampleX; // Step between X samples + const int fSrcBPP; // Bits/bytes per pixel for the SrcConfig + // if bitsPerPixel % 8 == 0 + // fBPP is bytesPerPixel + // else + // fBPP is bitsPerPixel + const int fDstBPP; // Bytes per pixel for the destination color type + + SkSwizzler(RowProc fastProc, RowProc proc, const SkPMColor* ctable, int srcOffset, + int srcWidth, int dstOffset, int dstWidth, int srcBPP, int dstBPP); + static std::unique_ptr Make(const SkImageInfo& dstInfo, RowProc fastProc, + RowProc proc, const SkPMColor* ctable, int srcBPP, int dstBPP, + const SkCodec::Options& options, const SkIRect* frame); + + int onSetSampleX(int) override; + +}; +#endif // SkSwizzler_DEFINED diff --git a/gfx/skia/skia/src/core/Sk4px.h b/gfx/skia/skia/src/core/Sk4px.h new file mode 100644 index 0000000000..ec7653f34c --- /dev/null +++ b/gfx/skia/skia/src/core/Sk4px.h @@ -0,0 +1,249 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef Sk4px_DEFINED +#define Sk4px_DEFINED + +#include "include/core/SkColor.h" +#include "include/private/SkColorData.h" +#include "src/base/SkVx.h" + +// 1, 2 or 4 SkPMColors, generally vectorized. +class Sk4px { +public: + Sk4px(const skvx::byte16& v) : fV(v) {} + + static Sk4px DupPMColor(SkPMColor c) { + skvx::uint4 splat(c); + + Sk4px v; + memcpy((void*)&v, &splat, 16); + return v; + } + + // RGBA rgba XYZW xyzw -> AAAA aaaa WWWW wwww + Sk4px alphas() const { + static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian."); + return Sk4px(skvx::shuffle<3,3,3,3, 7,7,7,7, 11,11,11,11, 15,15,15,15>(fV)); + } + Sk4px inv() const { return Sk4px(skvx::byte16(255) - fV); } + + // When loading or storing fewer than 4 SkPMColors, we use the low lanes. + static Sk4px Load4(const SkPMColor px[4]) { + Sk4px v; + memcpy((void*)&v, px, 16); + return v; + } + static Sk4px Load2(const SkPMColor px[2]) { + Sk4px v; + memcpy((void*)&v, px, 8); + return v; + } + static Sk4px Load1(const SkPMColor px[1]) { + Sk4px v; + memcpy((void*)&v, px, 4); + return v; + } + + // Ditto for Alphas... Load2Alphas fills the low two lanes of Sk4px. + // AaXx -> AAAA aaaa XXXX xxxx + static Sk4px Load4Alphas(const SkAlpha alphas[4]) { + skvx::byte4 a = skvx::byte4::Load(alphas); + return Sk4px(skvx::shuffle<0,0,0,0, 1,1,1,1, 2,2,2,2, 3,3,3,3>(a)); + } + // Aa -> AAAA aaaa ???? ???? + static Sk4px Load2Alphas(const SkAlpha alphas[2]) { + skvx::byte2 a = skvx::byte2::Load(alphas); + return Sk4px(join(skvx::shuffle<0,0,0,0, 1,1,1,1>(a), skvx::byte8())); + } + + void store4(SkPMColor px[4]) const { memcpy(px, this, 16); } + void store2(SkPMColor px[2]) const { memcpy(px, this, 8); } + void store1(SkPMColor px[1]) const { memcpy(px, this, 4); } + + // 1, 2, or 4 SkPMColors with 16-bit components. + // This is most useful as the result of a multiply, e.g. from mulWiden(). + class Wide { + public: + Wide(const skvx::Vec<16, uint16_t>& v) : fV(v) {} + + // Rounds, i.e. (x+127) / 255. + Sk4px div255() const { return Sk4px(skvx::div255(fV)); } + + Wide operator * (const Wide& o) const { return Wide(fV * o.fV); } + Wide operator + (const Wide& o) const { return Wide(fV + o.fV); } + Wide operator - (const Wide& o) const { return Wide(fV - o.fV); } + Wide operator >> (int bits) const { return Wide(fV >> bits); } + Wide operator << (int bits) const { return Wide(fV << bits); } + + private: + skvx::Vec<16, uint16_t> fV; + }; + + // Widen 8-bit values to low 8-bits of 16-bit lanes. + Wide widen() const { return Wide(skvx::cast(fV)); } + // 8-bit x 8-bit -> 16-bit components. + Wide mulWiden(const skvx::byte16& o) const { return Wide(mull(fV, o)); } + + // The only 8-bit multiply we use is 8-bit x 8-bit -> 16-bit. Might as well make it pithy. + Wide operator * (const Sk4px& o) const { return this->mulWiden(o.fV); } + + Sk4px operator + (const Sk4px& o) const { return Sk4px(fV + o.fV); } + Sk4px operator - (const Sk4px& o) const { return Sk4px(fV - o.fV); } + Sk4px operator < (const Sk4px& o) const { return Sk4px(fV < o.fV); } + Sk4px operator & (const Sk4px& o) const { return Sk4px(fV & o.fV); } + Sk4px thenElse(const Sk4px& t, const Sk4px& e) const { + return Sk4px(if_then_else(fV, t.fV, e.fV)); + } + + // Generally faster than (*this * o).div255(). + // May be incorrect by +-1, but is always exactly correct when *this or o is 0 or 255. + Sk4px approxMulDiv255(const Sk4px& o) const { + return Sk4px(approx_scale(fV, o.fV)); + } + + Sk4px saturatedAdd(const Sk4px& o) const { + return Sk4px(saturated_add(fV, o.fV)); + } + + // A generic driver that maps fn over a src array into a dst array. + // fn should take an Sk4px (4 src pixels) and return an Sk4px (4 dst pixels). + template + [[maybe_unused]] static void MapSrc(int n, SkPMColor* dst, const SkPMColor* src, const Fn& fn) { + SkASSERT(dst); + SkASSERT(src); + // This looks a bit odd, but it helps loop-invariant hoisting across different calls to fn. + // Basically, we need to make sure we keep things inside a single loop. + while (n > 0) { + if (n >= 8) { + Sk4px dst0 = fn(Load4(src+0)), + dst4 = fn(Load4(src+4)); + dst0.store4(dst+0); + dst4.store4(dst+4); + dst += 8; src += 8; n -= 8; + continue; // Keep our stride at 8 pixels as long as possible. + } + SkASSERT(n <= 7); + if (n >= 4) { + fn(Load4(src)).store4(dst); + dst += 4; src += 4; n -= 4; + } + if (n >= 2) { + fn(Load2(src)).store2(dst); + dst += 2; src += 2; n -= 2; + } + if (n >= 1) { + fn(Load1(src)).store1(dst); + } + break; + } + } + + // As above, but with dst4' = fn(dst4, src4). + template + [[maybe_unused]] static void MapDstSrc(int n, SkPMColor* dst, const SkPMColor* src, + const Fn& fn) { + SkASSERT(dst); + SkASSERT(src); + while (n > 0) { + if (n >= 8) { + Sk4px dst0 = fn(Load4(dst+0), Load4(src+0)), + dst4 = fn(Load4(dst+4), Load4(src+4)); + dst0.store4(dst+0); + dst4.store4(dst+4); + dst += 8; src += 8; n -= 8; + continue; // Keep our stride at 8 pixels as long as possible. + } + SkASSERT(n <= 7); + if (n >= 4) { + fn(Load4(dst), Load4(src)).store4(dst); + dst += 4; src += 4; n -= 4; + } + if (n >= 2) { + fn(Load2(dst), Load2(src)).store2(dst); + dst += 2; src += 2; n -= 2; + } + if (n >= 1) { + fn(Load1(dst), Load1(src)).store1(dst); + } + break; + } + } + + // As above, but with dst4' = fn(dst4, alpha4). + template + [[maybe_unused]] static void MapDstAlpha(int n, SkPMColor* dst, const SkAlpha* a, + const Fn& fn) { + SkASSERT(dst); + SkASSERT(a); + while (n > 0) { + if (n >= 8) { + Sk4px dst0 = fn(Load4(dst+0), Load4Alphas(a+0)), + dst4 = fn(Load4(dst+4), Load4Alphas(a+4)); + dst0.store4(dst+0); + dst4.store4(dst+4); + dst += 8; a += 8; n -= 8; + continue; // Keep our stride at 8 pixels as long as possible. + } + SkASSERT(n <= 7); + if (n >= 4) { + fn(Load4(dst), Load4Alphas(a)).store4(dst); + dst += 4; a += 4; n -= 4; + } + if (n >= 2) { + fn(Load2(dst), Load2Alphas(a)).store2(dst); + dst += 2; a += 2; n -= 2; + } + if (n >= 1) { + fn(Load1(dst), skvx::byte16(*a)).store1(dst); + } + break; + } + } + + // As above, but with dst4' = fn(dst4, src4, alpha4). + template + [[maybe_unused]] static void MapDstSrcAlpha(int n, SkPMColor* dst, const SkPMColor* src, + const SkAlpha* a, const Fn& fn) { + SkASSERT(dst); + SkASSERT(src); + SkASSERT(a); + while (n > 0) { + if (n >= 8) { + Sk4px dst0 = fn(Load4(dst+0), Load4(src+0), Load4Alphas(a+0)), + dst4 = fn(Load4(dst+4), Load4(src+4), Load4Alphas(a+4)); + dst0.store4(dst+0); + dst4.store4(dst+4); + dst += 8; src += 8; a += 8; n -= 8; + continue; // Keep our stride at 8 pixels as long as possible. + } + SkASSERT(n <= 7); + if (n >= 4) { + fn(Load4(dst), Load4(src), Load4Alphas(a)).store4(dst); + dst += 4; src += 4; a += 4; n -= 4; + } + if (n >= 2) { + fn(Load2(dst), Load2(src), Load2Alphas(a)).store2(dst); + dst += 2; src += 2; a += 2; n -= 2; + } + if (n >= 1) { + fn(Load1(dst), Load1(src), skvx::byte16(*a)).store1(dst); + } + break; + } + } + +private: + Sk4px() = default; + + skvx::byte16 fV; +}; + +static_assert(sizeof(Sk4px) == sizeof(skvx::byte16)); +static_assert(alignof(Sk4px) == alignof(skvx::byte16)); + +#endif // Sk4px_DEFINED diff --git a/gfx/skia/skia/src/core/SkAAClip.cpp b/gfx/skia/skia/src/core/SkAAClip.cpp new file mode 100644 index 0000000000..2506bbd46a --- /dev/null +++ b/gfx/skia/skia/src/core/SkAAClip.cpp @@ -0,0 +1,1968 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkAAClip.h" + +#include "include/core/SkPath.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkRectPriv.h" +#include "src/core/SkScan.h" +#include +#include + +namespace { + +class AutoAAClipValidate { +public: + AutoAAClipValidate(const SkAAClip& clip) : fClip(clip) { + fClip.validate(); + } + ~AutoAAClipValidate() { + fClip.validate(); + } +private: + const SkAAClip& fClip; +}; + +#ifdef SK_DEBUG + #define AUTO_AACLIP_VALIDATE(clip) AutoAAClipValidate acv(clip) +#else + #define AUTO_AACLIP_VALIDATE(clip) +#endif + +/////////////////////////////////////////////////////////////////////////////// + +static constexpr int32_t kMaxInt32 = 0x7FFFFFFF; + +#ifdef SK_DEBUG +// assert we're exactly width-wide, and then return the number of bytes used +static size_t compute_row_length(const uint8_t row[], int width) { + const uint8_t* origRow = row; + while (width > 0) { + int n = row[0]; + SkASSERT(n > 0); + SkASSERT(n <= width); + row += 2; + width -= n; + } + SkASSERT(0 == width); + return row - origRow; +} +#endif + +/* + * Data runs are packed [count, alpha] + */ +struct YOffset { + int32_t fY; + uint32_t fOffset; +}; + +class RowIter { +public: + RowIter(const uint8_t* row, const SkIRect& bounds) { + fRow = row; + fLeft = bounds.fLeft; + fBoundsRight = bounds.fRight; + if (row) { + fRight = bounds.fLeft + row[0]; + SkASSERT(fRight <= fBoundsRight); + fAlpha = row[1]; + fDone = false; + } else { + fDone = true; + fRight = kMaxInt32; + fAlpha = 0; + } + } + + bool done() const { return fDone; } + int left() const { return fLeft; } + int right() const { return fRight; } + U8CPU alpha() const { return fAlpha; } + void next() { + if (!fDone) { + fLeft = fRight; + if (fRight == fBoundsRight) { + fDone = true; + fRight = kMaxInt32; + fAlpha = 0; + } else { + fRow += 2; + fRight += fRow[0]; + fAlpha = fRow[1]; + SkASSERT(fRight <= fBoundsRight); + } + } + } + +private: + const uint8_t* fRow; + int fLeft; + int fRight; + int fBoundsRight; + bool fDone; + uint8_t fAlpha; +}; + +class Iter { +public: + Iter() = default; + + Iter(int y, const uint8_t* data, const YOffset* start, const YOffset* end) + : fCurrYOff(start) + , fStopYOff(end) + , fData(data + start->fOffset) + , fTop(y) + , fBottom(y + start->fY + 1) + , fDone(false) {} + + bool done() const { return fDone; } + int top() const { return fTop; } + int bottom() const { return fBottom; } + const uint8_t* data() const { return fData; } + + void next() { + if (!fDone) { + const YOffset* prev = fCurrYOff; + const YOffset* curr = prev + 1; + SkASSERT(curr <= fStopYOff); + + fTop = fBottom; + if (curr >= fStopYOff) { + fDone = true; + fBottom = kMaxInt32; + fData = nullptr; + } else { + fBottom += curr->fY - prev->fY; + fData += curr->fOffset - prev->fOffset; + fCurrYOff = curr; + } + } + } + +private: + const YOffset* fCurrYOff = nullptr; + const YOffset* fStopYOff = nullptr; + const uint8_t* fData = nullptr; + + int fTop = kMaxInt32; + int fBottom = kMaxInt32; + bool fDone = true; +}; + +} // namespace + +/////////////////////////////////////////////////////////////////////////////// + +struct SkAAClip::RunHead { + std::atomic fRefCnt; + int32_t fRowCount; + size_t fDataSize; + + YOffset* yoffsets() { + return (YOffset*)((char*)this + sizeof(RunHead)); + } + const YOffset* yoffsets() const { + return (const YOffset*)((const char*)this + sizeof(RunHead)); + } + uint8_t* data() { + return (uint8_t*)(this->yoffsets() + fRowCount); + } + const uint8_t* data() const { + return (const uint8_t*)(this->yoffsets() + fRowCount); + } + + static RunHead* Alloc(int rowCount, size_t dataSize) { + size_t size = sizeof(RunHead) + rowCount * sizeof(YOffset) + dataSize; + RunHead* head = (RunHead*)sk_malloc_throw(size); + head->fRefCnt.store(1); + head->fRowCount = rowCount; + head->fDataSize = dataSize; + return head; + } + + static int ComputeRowSizeForWidth(int width) { + // 2 bytes per segment, where each segment can store up to 255 for count + int segments = 0; + while (width > 0) { + segments += 1; + int n = std::min(width, 255); + width -= n; + } + return segments * 2; // each segment is row[0] + row[1] (n + alpha) + } + + static RunHead* AllocRect(const SkIRect& bounds) { + SkASSERT(!bounds.isEmpty()); + int width = bounds.width(); + size_t rowSize = ComputeRowSizeForWidth(width); + RunHead* head = RunHead::Alloc(1, rowSize); + YOffset* yoff = head->yoffsets(); + yoff->fY = bounds.height() - 1; + yoff->fOffset = 0; + uint8_t* row = head->data(); + while (width > 0) { + int n = std::min(width, 255); + row[0] = n; + row[1] = 0xFF; + width -= n; + row += 2; + } + return head; + } + + static Iter Iterate(const SkAAClip& clip) { + const RunHead* head = clip.fRunHead; + if (!clip.fRunHead) { + // A null run head is an empty clip, so return aan already finished iterator. + return Iter(); + } + + return Iter(clip.getBounds().fTop, head->data(), head->yoffsets(), + head->yoffsets() + head->fRowCount); + } +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkAAClip::Builder { + class Blitter; + + SkIRect fBounds; + struct Row { + int fY; + int fWidth; + SkTDArray* fData; + }; + SkTDArray fRows; + Row* fCurrRow; + int fPrevY; + int fWidth; + int fMinY; + +public: + Builder(const SkIRect& bounds) : fBounds(bounds) { + fPrevY = -1; + fWidth = bounds.width(); + fCurrRow = nullptr; + fMinY = bounds.fTop; + } + + ~Builder() { + Row* row = fRows.begin(); + Row* stop = fRows.end(); + while (row < stop) { + delete row->fData; + row += 1; + } + } + + bool applyClipOp(SkAAClip* target, const SkAAClip& other, SkClipOp op); + bool blitPath(SkAAClip* target, const SkPath& path, bool doAA); + +private: + using AlphaProc = U8CPU (*)(U8CPU alphaA, U8CPU alphaB); + void operateX(int lastY, RowIter& iterA, RowIter& iterB, AlphaProc proc); + void operateY(const SkAAClip& A, const SkAAClip& B, SkClipOp op); + + void addRun(int x, int y, U8CPU alpha, int count) { + SkASSERT(count > 0); + SkASSERT(fBounds.contains(x, y)); + SkASSERT(fBounds.contains(x + count - 1, y)); + + x -= fBounds.left(); + y -= fBounds.top(); + + Row* row = fCurrRow; + if (y != fPrevY) { + SkASSERT(y > fPrevY); + fPrevY = y; + row = this->flushRow(true); + row->fY = y; + row->fWidth = 0; + SkASSERT(row->fData); + SkASSERT(row->fData->empty()); + fCurrRow = row; + } + + SkASSERT(row->fWidth <= x); + SkASSERT(row->fWidth < fBounds.width()); + + SkTDArray& data = *row->fData; + + int gap = x - row->fWidth; + if (gap) { + AppendRun(data, 0, gap); + row->fWidth += gap; + SkASSERT(row->fWidth < fBounds.width()); + } + + AppendRun(data, alpha, count); + row->fWidth += count; + SkASSERT(row->fWidth <= fBounds.width()); + } + + void addColumn(int x, int y, U8CPU alpha, int height) { + SkASSERT(fBounds.contains(x, y + height - 1)); + + this->addRun(x, y, alpha, 1); + this->flushRowH(fCurrRow); + y -= fBounds.fTop; + SkASSERT(y == fCurrRow->fY); + fCurrRow->fY = y + height - 1; + } + + void addRectRun(int x, int y, int width, int height) { + SkASSERT(fBounds.contains(x + width - 1, y + height - 1)); + this->addRun(x, y, 0xFF, width); + + // we assum the rect must be all we'll see for these scanlines + // so we ensure our row goes all the way to our right + this->flushRowH(fCurrRow); + + y -= fBounds.fTop; + SkASSERT(y == fCurrRow->fY); + fCurrRow->fY = y + height - 1; + } + + void addAntiRectRun(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) { + // According to SkBlitter.cpp, no matter whether leftAlpha is 0 or positive, + // we should always consider [x, x+1] as the left-most column and [x+1, x+1+width] + // as the rect with full alpha. + SkASSERT(fBounds.contains(x + width + (rightAlpha > 0 ? 1 : 0), + y + height - 1)); + SkASSERT(width >= 0); + + // Conceptually we're always adding 3 runs, but we should + // merge or omit them if possible. + if (leftAlpha == 0xFF) { + width++; + } else if (leftAlpha > 0) { + this->addRun(x++, y, leftAlpha, 1); + } else { + // leftAlpha is 0, ignore the left column + x++; + } + if (rightAlpha == 0xFF) { + width++; + } + if (width > 0) { + this->addRun(x, y, 0xFF, width); + } + if (rightAlpha > 0 && rightAlpha < 255) { + this->addRun(x + width, y, rightAlpha, 1); + } + + // if we never called addRun, we might not have a fCurrRow yet + if (fCurrRow) { + // we assume the rect must be all we'll see for these scanlines + // so we ensure our row goes all the way to our right + this->flushRowH(fCurrRow); + + y -= fBounds.fTop; + SkASSERT(y == fCurrRow->fY); + fCurrRow->fY = y + height - 1; + } + } + + bool finish(SkAAClip* target) { + this->flushRow(false); + + const Row* row = fRows.begin(); + const Row* stop = fRows.end(); + + size_t dataSize = 0; + while (row < stop) { + dataSize += row->fData->size(); + row += 1; + } + + if (0 == dataSize) { + return target->setEmpty(); + } + + SkASSERT(fMinY >= fBounds.fTop); + SkASSERT(fMinY < fBounds.fBottom); + int adjustY = fMinY - fBounds.fTop; + fBounds.fTop = fMinY; + + RunHead* head = RunHead::Alloc(fRows.size(), dataSize); + YOffset* yoffset = head->yoffsets(); + uint8_t* data = head->data(); + uint8_t* baseData = data; + + row = fRows.begin(); + SkDEBUGCODE(int prevY = row->fY - 1;) + while (row < stop) { + SkASSERT(prevY < row->fY); // must be monotonic + SkDEBUGCODE(prevY = row->fY); + + yoffset->fY = row->fY - adjustY; + yoffset->fOffset = SkToU32(data - baseData); + yoffset += 1; + + size_t n = row->fData->size(); + memcpy(data, row->fData->begin(), n); + SkASSERT(compute_row_length(data, fBounds.width()) == n); + data += n; + + row += 1; + } + + target->freeRuns(); + target->fBounds = fBounds; + target->fRunHead = head; + return target->trimBounds(); + } + + void dump() { + this->validate(); + int y; + for (y = 0; y < fRows.size(); ++y) { + const Row& row = fRows[y]; + SkDebugf("Y:%3d W:%3d", row.fY, row.fWidth); + const SkTDArray& data = *row.fData; + int count = data.size(); + SkASSERT(!(count & 1)); + const uint8_t* ptr = data.begin(); + for (int x = 0; x < count; x += 2) { + SkDebugf(" [%3d:%02X]", ptr[0], ptr[1]); + ptr += 2; + } + SkDebugf("\n"); + } + } + + void validate() { +#ifdef SK_DEBUG + int prevY = -1; + for (int i = 0; i < fRows.size(); ++i) { + const Row& row = fRows[i]; + SkASSERT(prevY < row.fY); + SkASSERT(fWidth == row.fWidth); + int count = row.fData->size(); + const uint8_t* ptr = row.fData->begin(); + SkASSERT(!(count & 1)); + int w = 0; + for (int x = 0; x < count; x += 2) { + int n = ptr[0]; + SkASSERT(n > 0); + w += n; + SkASSERT(w <= fWidth); + ptr += 2; + } + SkASSERT(w == fWidth); + prevY = row.fY; + } +#endif + } + + void flushRowH(Row* row) { + // flush current row if needed + if (row->fWidth < fWidth) { + AppendRun(*row->fData, 0, fWidth - row->fWidth); + row->fWidth = fWidth; + } + } + + Row* flushRow(bool readyForAnother) { + Row* next = nullptr; + int count = fRows.size(); + if (count > 0) { + this->flushRowH(&fRows[count - 1]); + } + if (count > 1) { + // are our last two runs the same? + Row* prev = &fRows[count - 2]; + Row* curr = &fRows[count - 1]; + SkASSERT(prev->fWidth == fWidth); + SkASSERT(curr->fWidth == fWidth); + if (*prev->fData == *curr->fData) { + prev->fY = curr->fY; + if (readyForAnother) { + curr->fData->clear(); + next = curr; + } else { + delete curr->fData; + fRows.removeShuffle(count - 1); + } + } else { + if (readyForAnother) { + next = fRows.append(); + next->fData = new SkTDArray; + } + } + } else { + if (readyForAnother) { + next = fRows.append(); + next->fData = new SkTDArray; + } + } + return next; + } + + static void AppendRun(SkTDArray& data, U8CPU alpha, int count) { + do { + int n = count; + if (n > 255) { + n = 255; + } + uint8_t* ptr = data.append(2); + ptr[0] = n; + ptr[1] = alpha; + count -= n; + } while (count > 0); + } +}; + +void SkAAClip::Builder::operateX(int lastY, RowIter& iterA, RowIter& iterB, AlphaProc proc) { + auto advanceRowIter = [](RowIter& iter, int& iterLeft, int& iterRite, int rite) { + if (rite == iterRite) { + iter.next(); + iterLeft = iter.left(); + iterRite = iter.right(); + } + }; + + int leftA = iterA.left(); + int riteA = iterA.right(); + int leftB = iterB.left(); + int riteB = iterB.right(); + + int prevRite = fBounds.fLeft; + + do { + U8CPU alphaA = 0; + U8CPU alphaB = 0; + int left, rite; + + if (leftA < leftB) { + left = leftA; + alphaA = iterA.alpha(); + if (riteA <= leftB) { + rite = riteA; + } else { + rite = leftA = leftB; + } + } else if (leftB < leftA) { + left = leftB; + alphaB = iterB.alpha(); + if (riteB <= leftA) { + rite = riteB; + } else { + rite = leftB = leftA; + } + } else { + left = leftA; // or leftB, since leftA == leftB + rite = leftA = leftB = std::min(riteA, riteB); + alphaA = iterA.alpha(); + alphaB = iterB.alpha(); + } + + if (left >= fBounds.fRight) { + break; + } + if (rite > fBounds.fRight) { + rite = fBounds.fRight; + } + + if (left >= fBounds.fLeft) { + SkASSERT(rite > left); + this->addRun(left, lastY, proc(alphaA, alphaB), rite - left); + prevRite = rite; + } + + advanceRowIter(iterA, leftA, riteA, rite); + advanceRowIter(iterB, leftB, riteB, rite); + } while (!iterA.done() || !iterB.done()); + + if (prevRite < fBounds.fRight) { + this->addRun(prevRite, lastY, 0, fBounds.fRight - prevRite); + } +} + +void SkAAClip::Builder::operateY(const SkAAClip& A, const SkAAClip& B, SkClipOp op) { + static const AlphaProc kDiff = [](U8CPU a, U8CPU b) { return SkMulDiv255Round(a, 0xFF - b); }; + static const AlphaProc kIntersect = [](U8CPU a, U8CPU b) { return SkMulDiv255Round(a, b); }; + AlphaProc proc = (op == SkClipOp::kDifference) ? kDiff : kIntersect; + + Iter iterA = RunHead::Iterate(A); + Iter iterB = RunHead::Iterate(B); + + SkASSERT(!iterA.done()); + int topA = iterA.top(); + int botA = iterA.bottom(); + SkASSERT(!iterB.done()); + int topB = iterB.top(); + int botB = iterB.bottom(); + + auto advanceIter = [](Iter& iter, int& iterTop, int& iterBot, int bot) { + if (bot == iterBot) { + iter.next(); + iterTop = iterBot; + SkASSERT(iterBot == iter.top()); + iterBot = iter.bottom(); + } + }; + +#if defined(SK_BUILD_FOR_FUZZER) + if ((botA - topA) > 100000 || (botB - topB) > 100000) { + return; + } +#endif + + do { + const uint8_t* rowA = nullptr; + const uint8_t* rowB = nullptr; + int top, bot; + + if (topA < topB) { + top = topA; + rowA = iterA.data(); + if (botA <= topB) { + bot = botA; + } else { + bot = topA = topB; + } + + } else if (topB < topA) { + top = topB; + rowB = iterB.data(); + if (botB <= topA) { + bot = botB; + } else { + bot = topB = topA; + } + } else { + top = topA; // or topB, since topA == topB + bot = topA = topB = std::min(botA, botB); + rowA = iterA.data(); + rowB = iterB.data(); + } + + if (top >= fBounds.fBottom) { + break; + } + + if (bot > fBounds.fBottom) { + bot = fBounds.fBottom; + } + SkASSERT(top < bot); + + if (!rowA && !rowB) { + this->addRun(fBounds.fLeft, bot - 1, 0, fBounds.width()); + } else if (top >= fBounds.fTop) { + SkASSERT(bot <= fBounds.fBottom); + RowIter rowIterA(rowA, rowA ? A.getBounds() : fBounds); + RowIter rowIterB(rowB, rowB ? B.getBounds() : fBounds); + this->operateX(bot - 1, rowIterA, rowIterB, proc); + } + + advanceIter(iterA, topA, botA, bot); + advanceIter(iterB, topB, botB, bot); + } while (!iterA.done() || !iterB.done()); +} + +class SkAAClip::Builder::Blitter final : public SkBlitter { + int fLastY; + + /* + If we see a gap of 1 or more empty scanlines while building in Y-order, + we inject an explicit empty scanline (alpha==0) + + See AAClipTest.cpp : test_path_with_hole() + */ + void checkForYGap(int y) { + SkASSERT(y >= fLastY); + if (fLastY > -SK_MaxS32) { + int gap = y - fLastY; + if (gap > 1) { + fBuilder->addRun(fLeft, y - 1, 0, fRight - fLeft); + } + } + fLastY = y; + } + +public: + Blitter(Builder* builder) { + fBuilder = builder; + fLeft = builder->fBounds.fLeft; + fRight = builder->fBounds.fRight; + fMinY = SK_MaxS32; + fLastY = -SK_MaxS32; // sentinel + } + + void finish() { + if (fMinY < SK_MaxS32) { + fBuilder->fMinY = fMinY; + } + } + + /** + Must evaluate clips in scan-line order, so don't want to allow blitV(), + but an AAClip can be clipped down to a single pixel wide, so we + must support it (given AntiRect semantics: minimum width is 2). + Instead we'll rely on the runtime asserts to guarantee Y monotonicity; + any failure cases that misses may have minor artifacts. + */ + void blitV(int x, int y, int height, SkAlpha alpha) override { + if (height == 1) { + // We're still in scan-line order if height is 1 + // This is useful for Analytic AA + const SkAlpha alphas[2] = {alpha, 0}; + const int16_t runs[2] = {1, 0}; + this->blitAntiH(x, y, alphas, runs); + } else { + this->recordMinY(y); + fBuilder->addColumn(x, y, alpha, height); + fLastY = y + height - 1; + } + } + + void blitRect(int x, int y, int width, int height) override { + this->recordMinY(y); + this->checkForYGap(y); + fBuilder->addRectRun(x, y, width, height); + fLastY = y + height - 1; + } + + void blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) override { + this->recordMinY(y); + this->checkForYGap(y); + fBuilder->addAntiRectRun(x, y, width, height, leftAlpha, rightAlpha); + fLastY = y + height - 1; + } + + void blitMask(const SkMask&, const SkIRect& clip) override + { unexpected(); } + + const SkPixmap* justAnOpaqueColor(uint32_t*) override { + return nullptr; + } + + void blitH(int x, int y, int width) override { + this->recordMinY(y); + this->checkForYGap(y); + fBuilder->addRun(x, y, 0xFF, width); + } + + void blitAntiH(int x, int y, const SkAlpha alpha[], const int16_t runs[]) override { + this->recordMinY(y); + this->checkForYGap(y); + for (;;) { + int count = *runs; + if (count <= 0) { + return; + } + + // The supersampler's buffer can be the width of the device, so + // we may have to trim the run to our bounds. Previously, we assert that + // the extra spans are always alpha==0. + // However, the analytic AA is too sensitive to precision errors + // so it may have extra spans with very tiny alpha because after several + // arithmatic operations, the edge may bleed the path boundary a little bit. + // Therefore, instead of always asserting alpha==0, we assert alpha < 0x10. + int localX = x; + int localCount = count; + if (x < fLeft) { + SkASSERT(0x10 > *alpha); + int gap = fLeft - x; + SkASSERT(gap <= count); + localX += gap; + localCount -= gap; + } + int right = x + count; + if (right > fRight) { + SkASSERT(0x10 > *alpha); + localCount -= right - fRight; + SkASSERT(localCount >= 0); + } + + if (localCount) { + fBuilder->addRun(localX, y, *alpha, localCount); + } + // Next run + runs += count; + alpha += count; + x += count; + } + } + +private: + Builder* fBuilder; + int fLeft; // cache of builder's bounds' left edge + int fRight; + int fMinY; + + /* + * We track this, in case the scan converter skipped some number of + * scanlines at the (relative to the bounds it was given). This allows + * the builder, during its finish, to trip its bounds down to the "real" + * top. + */ + void recordMinY(int y) { + if (y < fMinY) { + fMinY = y; + } + } + + void unexpected() { + SK_ABORT("---- did not expect to get called here"); + } +}; + +bool SkAAClip::Builder::applyClipOp(SkAAClip* target, const SkAAClip& other, SkClipOp op) { + this->operateY(*target, other, op); + return this->finish(target); +} + +bool SkAAClip::Builder::blitPath(SkAAClip* target, const SkPath& path, bool doAA) { + Blitter blitter(this); + SkRegion clip(fBounds); + + if (doAA) { + SkScan::AntiFillPath(path, clip, &blitter, true); + } else { + SkScan::FillPath(path, clip, &blitter); + } + + blitter.finish(); + return this->finish(target); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkAAClip::copyToMask(SkMask* mask) const { + auto expandRowToMask = [](uint8_t* dst, const uint8_t* row, int width) { + while (width > 0) { + int n = row[0]; + SkASSERT(width >= n); + memset(dst, row[1], n); + dst += n; + row += 2; + width -= n; + } + SkASSERT(0 == width); + }; + + mask->fFormat = SkMask::kA8_Format; + if (this->isEmpty()) { + mask->fBounds.setEmpty(); + mask->fImage = nullptr; + mask->fRowBytes = 0; + return; + } + + mask->fBounds = fBounds; + mask->fRowBytes = fBounds.width(); + size_t size = mask->computeImageSize(); + mask->fImage = SkMask::AllocImage(size); + + Iter iter = RunHead::Iterate(*this); + uint8_t* dst = mask->fImage; + const int width = fBounds.width(); + + int y = fBounds.fTop; + while (!iter.done()) { + do { + expandRowToMask(dst, iter.data(), width); + dst += mask->fRowBytes; + } while (++y < iter.bottom()); + iter.next(); + } +} + +#ifdef SK_DEBUG + +void SkAAClip::validate() const { + if (nullptr == fRunHead) { + SkASSERT(fBounds.isEmpty()); + return; + } + SkASSERT(!fBounds.isEmpty()); + + const RunHead* head = fRunHead; + SkASSERT(head->fRefCnt.load() > 0); + SkASSERT(head->fRowCount > 0); + + const YOffset* yoff = head->yoffsets(); + const YOffset* ystop = yoff + head->fRowCount; + const int lastY = fBounds.height() - 1; + + // Y and offset must be monotonic + int prevY = -1; + int32_t prevOffset = -1; + while (yoff < ystop) { + SkASSERT(prevY < yoff->fY); + SkASSERT(yoff->fY <= lastY); + prevY = yoff->fY; + SkASSERT(prevOffset < (int32_t)yoff->fOffset); + prevOffset = yoff->fOffset; + const uint8_t* row = head->data() + yoff->fOffset; + size_t rowLength = compute_row_length(row, fBounds.width()); + SkASSERT(yoff->fOffset + rowLength <= head->fDataSize); + yoff += 1; + } + // check the last entry; + --yoff; + SkASSERT(yoff->fY == lastY); +} + +static void dump_one_row(const uint8_t* SK_RESTRICT row, + int width, int leading_num) { + if (leading_num) { + SkDebugf( "%03d ", leading_num ); + } + while (width > 0) { + int n = row[0]; + int val = row[1]; + char out = '.'; + if (val == 0xff) { + out = '*'; + } else if (val > 0) { + out = '+'; + } + for (int i = 0 ; i < n ; i++) { + SkDebugf( "%c", out ); + } + row += 2; + width -= n; + } + SkDebugf( "\n" ); +} + +void SkAAClip::debug(bool compress_y) const { + Iter iter = RunHead::Iterate(*this); + const int width = fBounds.width(); + + int y = fBounds.fTop; + while (!iter.done()) { + if (compress_y) { + dump_one_row(iter.data(), width, iter.bottom() - iter.top() + 1); + } else { + do { + dump_one_row(iter.data(), width, 0); + } while (++y < iter.bottom()); + } + iter.next(); + } +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +// Count the number of zeros on the left and right edges of the passed in +// RLE row. If 'row' is all zeros return 'width' in both variables. +static void count_left_right_zeros(const uint8_t* row, int width, + int* leftZ, int* riteZ) { + int zeros = 0; + do { + if (row[1]) { + break; + } + int n = row[0]; + SkASSERT(n > 0); + SkASSERT(n <= width); + zeros += n; + row += 2; + width -= n; + } while (width > 0); + *leftZ = zeros; + + if (0 == width) { + // this line is completely empty return 'width' in both variables + *riteZ = *leftZ; + return; + } + + zeros = 0; + while (width > 0) { + int n = row[0]; + SkASSERT(n > 0); + if (0 == row[1]) { + zeros += n; + } else { + zeros = 0; + } + row += 2; + width -= n; + } + *riteZ = zeros; +} + +// modify row in place, trimming off (zeros) from the left and right sides. +// return the number of bytes that were completely eliminated from the left +static int trim_row_left_right(uint8_t* row, int width, int leftZ, int riteZ) { + int trim = 0; + while (leftZ > 0) { + SkASSERT(0 == row[1]); + int n = row[0]; + SkASSERT(n > 0); + SkASSERT(n <= width); + width -= n; + row += 2; + if (n > leftZ) { + row[-2] = n - leftZ; + break; + } + trim += 2; + leftZ -= n; + SkASSERT(leftZ >= 0); + } + + if (riteZ) { + // walk row to the end, and then we'll back up to trim riteZ + while (width > 0) { + int n = row[0]; + SkASSERT(n <= width); + width -= n; + row += 2; + } + // now skip whole runs of zeros + do { + row -= 2; + SkASSERT(0 == row[1]); + int n = row[0]; + SkASSERT(n > 0); + if (n > riteZ) { + row[0] = n - riteZ; + break; + } + riteZ -= n; + SkASSERT(riteZ >= 0); + } while (riteZ > 0); + } + + return trim; +} + +bool SkAAClip::trimLeftRight() { + if (this->isEmpty()) { + return false; + } + + AUTO_AACLIP_VALIDATE(*this); + + const int width = fBounds.width(); + RunHead* head = fRunHead; + YOffset* yoff = head->yoffsets(); + YOffset* stop = yoff + head->fRowCount; + uint8_t* base = head->data(); + + // After this loop, 'leftZeros' & 'rightZeros' will contain the minimum + // number of zeros on the left and right of the clip. This information + // can be used to shrink the bounding box. + int leftZeros = width; + int riteZeros = width; + while (yoff < stop) { + int L, R; + count_left_right_zeros(base + yoff->fOffset, width, &L, &R); + SkASSERT(L + R < width || (L == width && R == width)); + if (L < leftZeros) { + leftZeros = L; + } + if (R < riteZeros) { + riteZeros = R; + } + if (0 == (leftZeros | riteZeros)) { + // no trimming to do + return true; + } + yoff += 1; + } + + SkASSERT(leftZeros || riteZeros); + if (width == leftZeros) { + SkASSERT(width == riteZeros); + return this->setEmpty(); + } + + this->validate(); + + fBounds.fLeft += leftZeros; + fBounds.fRight -= riteZeros; + SkASSERT(!fBounds.isEmpty()); + + // For now we don't realloc the storage (for time), we just shrink in place + // This means we don't have to do any memmoves either, since we can just + // play tricks with the yoff->fOffset for each row + yoff = head->yoffsets(); + while (yoff < stop) { + uint8_t* row = base + yoff->fOffset; + SkDEBUGCODE((void)compute_row_length(row, width);) + yoff->fOffset += trim_row_left_right(row, width, leftZeros, riteZeros); + SkDEBUGCODE((void)compute_row_length(base + yoff->fOffset, width - leftZeros - riteZeros);) + yoff += 1; + } + return true; +} + +static bool row_is_all_zeros(const uint8_t* row, int width) { + SkASSERT(width > 0); + do { + if (row[1]) { + return false; + } + int n = row[0]; + SkASSERT(n <= width); + width -= n; + row += 2; + } while (width > 0); + SkASSERT(0 == width); + return true; +} + +bool SkAAClip::trimTopBottom() { + if (this->isEmpty()) { + return false; + } + + this->validate(); + + const int width = fBounds.width(); + RunHead* head = fRunHead; + YOffset* yoff = head->yoffsets(); + YOffset* stop = yoff + head->fRowCount; + const uint8_t* base = head->data(); + + // Look to trim away empty rows from the top. + // + int skip = 0; + while (yoff < stop) { + const uint8_t* data = base + yoff->fOffset; + if (!row_is_all_zeros(data, width)) { + break; + } + skip += 1; + yoff += 1; + } + SkASSERT(skip <= head->fRowCount); + if (skip == head->fRowCount) { + return this->setEmpty(); + } + if (skip > 0) { + // adjust fRowCount and fBounds.fTop, and slide all the data up + // as we remove [skip] number of YOffset entries + yoff = head->yoffsets(); + int dy = yoff[skip - 1].fY + 1; + for (int i = skip; i < head->fRowCount; ++i) { + SkASSERT(yoff[i].fY >= dy); + yoff[i].fY -= dy; + } + YOffset* dst = head->yoffsets(); + size_t size = head->fRowCount * sizeof(YOffset) + head->fDataSize; + memmove(dst, dst + skip, size - skip * sizeof(YOffset)); + + fBounds.fTop += dy; + SkASSERT(!fBounds.isEmpty()); + head->fRowCount -= skip; + SkASSERT(head->fRowCount > 0); + + this->validate(); + // need to reset this after the memmove + base = head->data(); + } + + // Look to trim away empty rows from the bottom. + // We know that we have at least one non-zero row, so we can just walk + // backwards without checking for running past the start. + // + stop = yoff = head->yoffsets() + head->fRowCount; + do { + yoff -= 1; + } while (row_is_all_zeros(base + yoff->fOffset, width)); + skip = SkToInt(stop - yoff - 1); + SkASSERT(skip >= 0 && skip < head->fRowCount); + if (skip > 0) { + // removing from the bottom is easier than from the top, as we don't + // have to adjust any of the Y values, we just have to trim the array + memmove(stop - skip, stop, head->fDataSize); + + fBounds.fBottom = fBounds.fTop + yoff->fY + 1; + SkASSERT(!fBounds.isEmpty()); + head->fRowCount -= skip; + SkASSERT(head->fRowCount > 0); + } + this->validate(); + + return true; +} + +// can't validate before we're done, since trimming is part of the process of +// making us valid after the Builder. Since we build from top to bottom, its +// possible our fBounds.fBottom is bigger than our last scanline of data, so +// we trim fBounds.fBottom back up. +// +// TODO: check for duplicates in X and Y to further compress our data +// +bool SkAAClip::trimBounds() { + if (this->isEmpty()) { + return false; + } + + const RunHead* head = fRunHead; + const YOffset* yoff = head->yoffsets(); + + SkASSERT(head->fRowCount > 0); + const YOffset& lastY = yoff[head->fRowCount - 1]; + SkASSERT(lastY.fY + 1 <= fBounds.height()); + fBounds.fBottom = fBounds.fTop + lastY.fY + 1; + SkASSERT(lastY.fY + 1 == fBounds.height()); + SkASSERT(!fBounds.isEmpty()); + + return this->trimTopBottom() && this->trimLeftRight(); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkAAClip::SkAAClip() { + fBounds.setEmpty(); + fRunHead = nullptr; +} + +SkAAClip::SkAAClip(const SkAAClip& src) { + SkDEBUGCODE(fBounds.setEmpty();) // need this for validate + fRunHead = nullptr; + *this = src; +} + +SkAAClip::~SkAAClip() { + this->freeRuns(); +} + +SkAAClip& SkAAClip::operator=(const SkAAClip& src) { + AUTO_AACLIP_VALIDATE(*this); + src.validate(); + + if (this != &src) { + this->freeRuns(); + fBounds = src.fBounds; + fRunHead = src.fRunHead; + if (fRunHead) { + fRunHead->fRefCnt++; + } + } + return *this; +} + +bool SkAAClip::setEmpty() { + this->freeRuns(); + fBounds.setEmpty(); + fRunHead = nullptr; + return false; +} + +bool SkAAClip::setRect(const SkIRect& bounds) { + if (bounds.isEmpty()) { + return this->setEmpty(); + } + + AUTO_AACLIP_VALIDATE(*this); + + this->freeRuns(); + fBounds = bounds; + fRunHead = RunHead::AllocRect(bounds); + SkASSERT(!this->isEmpty()); + return true; +} + +bool SkAAClip::isRect() const { + if (this->isEmpty()) { + return false; + } + + const RunHead* head = fRunHead; + if (head->fRowCount != 1) { + return false; + } + const YOffset* yoff = head->yoffsets(); + if (yoff->fY != fBounds.fBottom - 1) { + return false; + } + + const uint8_t* row = head->data() + yoff->fOffset; + int width = fBounds.width(); + do { + if (row[1] != 0xFF) { + return false; + } + int n = row[0]; + SkASSERT(n <= width); + width -= n; + row += 2; + } while (width > 0); + return true; +} + +bool SkAAClip::setRegion(const SkRegion& rgn) { + if (rgn.isEmpty()) { + return this->setEmpty(); + } + if (rgn.isRect()) { + return this->setRect(rgn.getBounds()); + } + + + const SkIRect& bounds = rgn.getBounds(); + const int offsetX = bounds.fLeft; + const int offsetY = bounds.fTop; + + SkTDArray yArray; + SkTDArray xArray; + + yArray.reserve(std::min(bounds.height(), 1024)); + xArray.reserve(std::min(bounds.width(), 512) * 128); + + auto appendXRun = [&xArray](uint8_t value, int count) { + SkASSERT(count >= 0); + while (count > 0) { + int n = count; + if (n > 255) { + n = 255; + } + uint8_t* data = xArray.append(2); + data[0] = n; + data[1] = value; + count -= n; + } + }; + + SkRegion::Iterator iter(rgn); + int prevRight = 0; + int prevBot = 0; + YOffset* currY = nullptr; + + for (; !iter.done(); iter.next()) { + const SkIRect& r = iter.rect(); + SkASSERT(bounds.contains(r)); + + int bot = r.fBottom - offsetY; + SkASSERT(bot >= prevBot); + if (bot > prevBot) { + if (currY) { + // flush current row + appendXRun(0, bounds.width() - prevRight); + } + // did we introduce an empty-gap from the prev row? + int top = r.fTop - offsetY; + if (top > prevBot) { + currY = yArray.append(); + currY->fY = top - 1; + currY->fOffset = xArray.size(); + appendXRun(0, bounds.width()); + } + // create a new record for this Y value + currY = yArray.append(); + currY->fY = bot - 1; + currY->fOffset = xArray.size(); + prevRight = 0; + prevBot = bot; + } + + int x = r.fLeft - offsetX; + appendXRun(0, x - prevRight); + + int w = r.fRight - r.fLeft; + appendXRun(0xFF, w); + prevRight = x + w; + SkASSERT(prevRight <= bounds.width()); + } + // flush last row + appendXRun(0, bounds.width() - prevRight); + + // now pack everything into a RunHead + RunHead* head = RunHead::Alloc(yArray.size(), xArray.size_bytes()); + memcpy(head->yoffsets(), yArray.begin(), yArray.size_bytes()); + memcpy(head->data(), xArray.begin(), xArray.size_bytes()); + + this->setEmpty(); + fBounds = bounds; + fRunHead = head; + this->validate(); + return true; +} + +bool SkAAClip::setPath(const SkPath& path, const SkIRect& clip, bool doAA) { + AUTO_AACLIP_VALIDATE(*this); + + if (clip.isEmpty()) { + return this->setEmpty(); + } + + SkIRect ibounds; + // Since we assert that the BuilderBlitter will never blit outside the intersection + // of clip and ibounds, we create the builder with the snug bounds. + if (path.isInverseFillType()) { + ibounds = clip; + } else { + path.getBounds().roundOut(&ibounds); + if (ibounds.isEmpty() || !ibounds.intersect(clip)) { + return this->setEmpty(); + } + } + + Builder builder(ibounds); + return builder.blitPath(this, path, doAA); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkAAClip::op(const SkAAClip& other, SkClipOp op) { + AUTO_AACLIP_VALIDATE(*this); + + if (this->isEmpty()) { + // Once the clip is empty, it cannot become un-empty. + return false; + } + + SkIRect bounds = fBounds; + switch(op) { + case SkClipOp::kDifference: + if (other.isEmpty() || !SkIRect::Intersects(fBounds, other.fBounds)) { + // this remains unmodified and isn't empty + return true; + } + break; + + case SkClipOp::kIntersect: + if (other.isEmpty() || !bounds.intersect(other.fBounds)) { + // the intersected clip becomes empty + return this->setEmpty(); + } + break; + } + + + SkASSERT(SkIRect::Intersects(bounds, fBounds)); + SkASSERT(SkIRect::Intersects(bounds, other.fBounds)); + + Builder builder(bounds); + return builder.applyClipOp(this, other, op); +} + +bool SkAAClip::op(const SkIRect& rect, SkClipOp op) { + // It can be expensive to build a local aaclip before applying the op, so + // we first see if we can restrict the bounds of new rect to our current + // bounds, or note that the new rect subsumes our current clip. + SkIRect pixelBounds = fBounds; + if (!pixelBounds.intersect(rect)) { + // No change or clip becomes empty depending on 'op' + switch(op) { + case SkClipOp::kDifference: return !this->isEmpty(); + case SkClipOp::kIntersect: return this->setEmpty(); + } + SkUNREACHABLE; + } else if (pixelBounds == fBounds) { + // Wholly inside 'rect', so clip becomes empty or remains unchanged + switch(op) { + case SkClipOp::kDifference: return this->setEmpty(); + case SkClipOp::kIntersect: return !this->isEmpty(); + } + SkUNREACHABLE; + } else if (op == SkClipOp::kIntersect && this->quickContains(pixelBounds)) { + // We become just the remaining rectangle + return this->setRect(pixelBounds); + } else { + SkAAClip clip; + clip.setRect(rect); + return this->op(clip, op); + } +} + +bool SkAAClip::op(const SkRect& rect, SkClipOp op, bool doAA) { + if (!doAA) { + return this->op(rect.round(), op); + } else { + // Tighten bounds for "path" aaclip of the rect + SkIRect pixelBounds = fBounds; + if (!pixelBounds.intersect(rect.roundOut())) { + // No change or clip becomes empty depending on 'op' + switch(op) { + case SkClipOp::kDifference: return !this->isEmpty(); + case SkClipOp::kIntersect: return this->setEmpty(); + } + SkUNREACHABLE; + } else if (rect.contains(SkRect::Make(fBounds))) { + // Wholly inside 'rect', so clip becomes empty or remains unchanged + switch(op) { + case SkClipOp::kDifference: return this->setEmpty(); + case SkClipOp::kIntersect: return !this->isEmpty(); + } + SkUNREACHABLE; + } else if (op == SkClipOp::kIntersect && this->quickContains(pixelBounds)) { + // We become just the rect intersected with pixel bounds (preserving fractional coords + // for AA edges). + return this->setPath(SkPath::Rect(rect), pixelBounds, /*doAA=*/true); + } else { + SkAAClip rectClip; + rectClip.setPath(SkPath::Rect(rect), + op == SkClipOp::kDifference ? fBounds : pixelBounds, + /*doAA=*/true); + return this->op(rectClip, op); + } + } +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkAAClip::translate(int dx, int dy, SkAAClip* dst) const { + if (nullptr == dst) { + return !this->isEmpty(); + } + + if (this->isEmpty()) { + return dst->setEmpty(); + } + + if (this != dst) { + fRunHead->fRefCnt++; + dst->freeRuns(); + dst->fRunHead = fRunHead; + dst->fBounds = fBounds; + } + dst->fBounds.offset(dx, dy); + return true; +} + +void SkAAClip::freeRuns() { + if (fRunHead) { + SkASSERT(fRunHead->fRefCnt.load() >= 1); + if (1 == fRunHead->fRefCnt--) { + sk_free(fRunHead); + } + } +} + +const uint8_t* SkAAClip::findRow(int y, int* lastYForRow) const { + SkASSERT(fRunHead); + + if (y < fBounds.fTop || y >= fBounds.fBottom) { + return nullptr; + } + y -= fBounds.y(); // our yoffs values are relative to the top + + const YOffset* yoff = fRunHead->yoffsets(); + while (yoff->fY < y) { + yoff += 1; + SkASSERT(yoff - fRunHead->yoffsets() < fRunHead->fRowCount); + } + + if (lastYForRow) { + *lastYForRow = fBounds.y() + yoff->fY; + } + return fRunHead->data() + yoff->fOffset; +} + +const uint8_t* SkAAClip::findX(const uint8_t data[], int x, int* initialCount) const { + SkASSERT(x >= fBounds.fLeft && x < fBounds.fRight); + x -= fBounds.x(); + + // first skip up to X + for (;;) { + int n = data[0]; + if (x < n) { + if (initialCount) { + *initialCount = n - x; + } + break; + } + data += 2; + x -= n; + } + return data; +} + +bool SkAAClip::quickContains(int left, int top, int right, int bottom) const { + if (this->isEmpty()) { + return false; + } + if (!fBounds.contains(SkIRect{left, top, right, bottom})) { + return false; + } + + int lastY SK_INIT_TO_AVOID_WARNING; + const uint8_t* row = this->findRow(top, &lastY); + if (lastY < bottom) { + return false; + } + // now just need to check in X + int count; + row = this->findX(row, left, &count); + + int rectWidth = right - left; + while (0xFF == row[1]) { + if (count >= rectWidth) { + return true; + } + rectWidth -= count; + row += 2; + count = row[0]; + } + return false; +} + +/////////////////////////////////////////////////////////////////////////////// + +static void expandToRuns(const uint8_t* SK_RESTRICT data, int initialCount, int width, + int16_t* SK_RESTRICT runs, SkAlpha* SK_RESTRICT aa) { + // we don't read our initial n from data, since the caller may have had to + // clip it, hence the initialCount parameter. + int n = initialCount; + for (;;) { + if (n > width) { + n = width; + } + SkASSERT(n > 0); + runs[0] = n; + runs += n; + + aa[0] = data[1]; + aa += n; + + data += 2; + width -= n; + if (0 == width) { + break; + } + // load the next count + n = data[0]; + } + runs[0] = 0; // sentinel +} + +SkAAClipBlitter::~SkAAClipBlitter() { + sk_free(fScanlineScratch); +} + +void SkAAClipBlitter::ensureRunsAndAA() { + if (nullptr == fScanlineScratch) { + // add 1 so we can store the terminating run count of 0 + int count = fAAClipBounds.width() + 1; + // we use this either for fRuns + fAA, or a scaline of a mask + // which may be as deep as 32bits + fScanlineScratch = sk_malloc_throw(count * sizeof(SkPMColor)); + fRuns = (int16_t*)fScanlineScratch; + fAA = (SkAlpha*)(fRuns + count); + } +} + +void SkAAClipBlitter::blitH(int x, int y, int width) { + SkASSERT(width > 0); + SkASSERT(fAAClipBounds.contains(x, y)); + SkASSERT(fAAClipBounds.contains(x + width - 1, y)); + + const uint8_t* row = fAAClip->findRow(y); + int initialCount; + row = fAAClip->findX(row, x, &initialCount); + + if (initialCount >= width) { + SkAlpha alpha = row[1]; + if (0 == alpha) { + return; + } + if (0xFF == alpha) { + fBlitter->blitH(x, y, width); + return; + } + } + + this->ensureRunsAndAA(); + expandToRuns(row, initialCount, width, fRuns, fAA); + + fBlitter->blitAntiH(x, y, fAA, fRuns); +} + +static void merge(const uint8_t* SK_RESTRICT row, int rowN, + const SkAlpha* SK_RESTRICT srcAA, + const int16_t* SK_RESTRICT srcRuns, + SkAlpha* SK_RESTRICT dstAA, + int16_t* SK_RESTRICT dstRuns, + int width) { + SkDEBUGCODE(int accumulated = 0;) + int srcN = srcRuns[0]; + // do we need this check? + if (0 == srcN) { + return; + } + + for (;;) { + SkASSERT(rowN > 0); + SkASSERT(srcN > 0); + + unsigned newAlpha = SkMulDiv255Round(srcAA[0], row[1]); + int minN = std::min(srcN, rowN); + dstRuns[0] = minN; + dstRuns += minN; + dstAA[0] = newAlpha; + dstAA += minN; + + if (0 == (srcN -= minN)) { + srcN = srcRuns[0]; // refresh + srcRuns += srcN; + srcAA += srcN; + srcN = srcRuns[0]; // reload + if (0 == srcN) { + break; + } + } + if (0 == (rowN -= minN)) { + row += 2; + rowN = row[0]; // reload + } + + SkDEBUGCODE(accumulated += minN;) + SkASSERT(accumulated <= width); + } + dstRuns[0] = 0; +} + +void SkAAClipBlitter::blitAntiH(int x, int y, const SkAlpha aa[], + const int16_t runs[]) { + + const uint8_t* row = fAAClip->findRow(y); + int initialCount; + row = fAAClip->findX(row, x, &initialCount); + + this->ensureRunsAndAA(); + + merge(row, initialCount, aa, runs, fAA, fRuns, fAAClipBounds.width()); + fBlitter->blitAntiH(x, y, fAA, fRuns); +} + +void SkAAClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + if (fAAClip->quickContains(x, y, x + 1, y + height)) { + fBlitter->blitV(x, y, height, alpha); + return; + } + + for (;;) { + int lastY SK_INIT_TO_AVOID_WARNING; + const uint8_t* row = fAAClip->findRow(y, &lastY); + int dy = lastY - y + 1; + if (dy > height) { + dy = height; + } + height -= dy; + + row = fAAClip->findX(row, x); + SkAlpha newAlpha = SkMulDiv255Round(alpha, row[1]); + if (newAlpha) { + fBlitter->blitV(x, y, dy, newAlpha); + } + SkASSERT(height >= 0); + if (height <= 0) { + break; + } + y = lastY + 1; + } +} + +void SkAAClipBlitter::blitRect(int x, int y, int width, int height) { + if (fAAClip->quickContains(x, y, x + width, y + height)) { + fBlitter->blitRect(x, y, width, height); + return; + } + + while (--height >= 0) { + this->blitH(x, y, width); + y += 1; + } +} + +typedef void (*MergeAAProc)(const void* src, int width, const uint8_t* row, + int initialRowCount, void* dst); + +static void small_memcpy(void* dst, const void* src, size_t n) { + memcpy(dst, src, n); +} + +static void small_bzero(void* dst, size_t n) { + sk_bzero(dst, n); +} + +static inline uint8_t mergeOne(uint8_t value, unsigned alpha) { + return SkMulDiv255Round(value, alpha); +} + +static inline uint16_t mergeOne(uint16_t value, unsigned alpha) { + unsigned r = SkGetPackedR16(value); + unsigned g = SkGetPackedG16(value); + unsigned b = SkGetPackedB16(value); + return SkPackRGB16(SkMulDiv255Round(r, alpha), + SkMulDiv255Round(g, alpha), + SkMulDiv255Round(b, alpha)); +} + +template +void mergeT(const void* inSrc, int srcN, const uint8_t* SK_RESTRICT row, int rowN, void* inDst) { + const T* SK_RESTRICT src = static_cast(inSrc); + T* SK_RESTRICT dst = static_cast(inDst); + for (;;) { + SkASSERT(rowN > 0); + SkASSERT(srcN > 0); + + int n = std::min(rowN, srcN); + unsigned rowA = row[1]; + if (0xFF == rowA) { + small_memcpy(dst, src, n * sizeof(T)); + } else if (0 == rowA) { + small_bzero(dst, n * sizeof(T)); + } else { + for (int i = 0; i < n; ++i) { + dst[i] = mergeOne(src[i], rowA); + } + } + + if (0 == (srcN -= n)) { + break; + } + + src += n; + dst += n; + + SkASSERT(rowN == n); + row += 2; + rowN = row[0]; + } +} + +static MergeAAProc find_merge_aa_proc(SkMask::Format format) { + switch (format) { + case SkMask::kBW_Format: + SkDEBUGFAIL("unsupported"); + return nullptr; + case SkMask::kA8_Format: + case SkMask::k3D_Format: + return mergeT ; + case SkMask::kLCD16_Format: + return mergeT; + default: + SkDEBUGFAIL("unsupported"); + return nullptr; + } +} + +static U8CPU bit2byte(int bitInAByte) { + SkASSERT(bitInAByte <= 0xFF); + // negation turns any non-zero into 0xFFFFFF??, so we just shift down + // some value >= 8 to get a full FF value + return -bitInAByte >> 8; +} + +static void upscaleBW2A8(SkMask* dstMask, const SkMask& srcMask) { + SkASSERT(SkMask::kBW_Format == srcMask.fFormat); + SkASSERT(SkMask::kA8_Format == dstMask->fFormat); + + const int width = srcMask.fBounds.width(); + const int height = srcMask.fBounds.height(); + + const uint8_t* SK_RESTRICT src = (const uint8_t*)srcMask.fImage; + const size_t srcRB = srcMask.fRowBytes; + uint8_t* SK_RESTRICT dst = (uint8_t*)dstMask->fImage; + const size_t dstRB = dstMask->fRowBytes; + + const int wholeBytes = width >> 3; + const int leftOverBits = width & 7; + + for (int y = 0; y < height; ++y) { + uint8_t* SK_RESTRICT d = dst; + for (int i = 0; i < wholeBytes; ++i) { + int srcByte = src[i]; + d[0] = bit2byte(srcByte & (1 << 7)); + d[1] = bit2byte(srcByte & (1 << 6)); + d[2] = bit2byte(srcByte & (1 << 5)); + d[3] = bit2byte(srcByte & (1 << 4)); + d[4] = bit2byte(srcByte & (1 << 3)); + d[5] = bit2byte(srcByte & (1 << 2)); + d[6] = bit2byte(srcByte & (1 << 1)); + d[7] = bit2byte(srcByte & (1 << 0)); + d += 8; + } + if (leftOverBits) { + int srcByte = src[wholeBytes]; + for (int x = 0; x < leftOverBits; ++x) { + *d++ = bit2byte(srcByte & 0x80); + srcByte <<= 1; + } + } + src += srcRB; + dst += dstRB; + } +} + +void SkAAClipBlitter::blitMask(const SkMask& origMask, const SkIRect& clip) { + SkASSERT(fAAClip->getBounds().contains(clip)); + + if (fAAClip->quickContains(clip)) { + fBlitter->blitMask(origMask, clip); + return; + } + + const SkMask* mask = &origMask; + + // if we're BW, we need to upscale to A8 (ugh) + SkMask grayMask; + if (SkMask::kBW_Format == origMask.fFormat) { + grayMask.fFormat = SkMask::kA8_Format; + grayMask.fBounds = origMask.fBounds; + grayMask.fRowBytes = origMask.fBounds.width(); + size_t size = grayMask.computeImageSize(); + grayMask.fImage = (uint8_t*)fGrayMaskScratch.reset(size, + SkAutoMalloc::kReuse_OnShrink); + + upscaleBW2A8(&grayMask, origMask); + mask = &grayMask; + } + + this->ensureRunsAndAA(); + + // HACK -- we are devolving 3D into A8, need to copy the rest of the 3D + // data into a temp block to support it better (ugh) + + const void* src = mask->getAddr(clip.fLeft, clip.fTop); + const size_t srcRB = mask->fRowBytes; + const int width = clip.width(); + MergeAAProc mergeProc = find_merge_aa_proc(mask->fFormat); + + SkMask rowMask; + rowMask.fFormat = SkMask::k3D_Format == mask->fFormat ? SkMask::kA8_Format : mask->fFormat; + rowMask.fBounds.fLeft = clip.fLeft; + rowMask.fBounds.fRight = clip.fRight; + rowMask.fRowBytes = mask->fRowBytes; // doesn't matter, since our height==1 + rowMask.fImage = (uint8_t*)fScanlineScratch; + + int y = clip.fTop; + const int stopY = y + clip.height(); + + do { + int localStopY SK_INIT_TO_AVOID_WARNING; + const uint8_t* row = fAAClip->findRow(y, &localStopY); + // findRow returns last Y, not stop, so we add 1 + localStopY = std::min(localStopY + 1, stopY); + + int initialCount; + row = fAAClip->findX(row, clip.fLeft, &initialCount); + do { + mergeProc(src, width, row, initialCount, rowMask.fImage); + rowMask.fBounds.fTop = y; + rowMask.fBounds.fBottom = y + 1; + fBlitter->blitMask(rowMask, rowMask.fBounds); + src = (const void*)((const char*)src + srcRB); + } while (++y < localStopY); + } while (y < stopY); +} + +const SkPixmap* SkAAClipBlitter::justAnOpaqueColor(uint32_t* value) { + return nullptr; +} diff --git a/gfx/skia/skia/src/core/SkAAClip.h b/gfx/skia/skia/src/core/SkAAClip.h new file mode 100644 index 0000000000..bb79fc275f --- /dev/null +++ b/gfx/skia/skia/src/core/SkAAClip.h @@ -0,0 +1,123 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAAClip_DEFINED +#define SkAAClip_DEFINED + +#include "include/core/SkClipOp.h" +#include "include/core/SkRect.h" +#include "src/base/SkAutoMalloc.h" +#include "src/core/SkBlitter.h" + +class SkPath; +class SkRegion; + +class SkAAClip { +public: + SkAAClip(); + SkAAClip(const SkAAClip&); + ~SkAAClip(); + + SkAAClip& operator=(const SkAAClip&); + + bool isEmpty() const { return nullptr == fRunHead; } + const SkIRect& getBounds() const { return fBounds; } + + // Returns true iff the clip is not empty, and is just a hard-edged rect (no partial alpha). + // If true, getBounds() can be used in place of this clip. + bool isRect() const; + + bool setEmpty(); + bool setRect(const SkIRect&); + bool setPath(const SkPath&, const SkIRect& bounds, bool doAA = true); + bool setRegion(const SkRegion&); + + bool op(const SkIRect&, SkClipOp); + bool op(const SkRect&, SkClipOp, bool doAA); + bool op(const SkAAClip&, SkClipOp); + + bool translate(int dx, int dy, SkAAClip* dst) const; + + /** + * Allocates a mask the size of the aaclip, and expands its data into + * the mask, using kA8_Format. Used for tests and visualization purposes. + */ + void copyToMask(SkMask*) const; + + bool quickContains(const SkIRect& r) const { + return this->quickContains(r.fLeft, r.fTop, r.fRight, r.fBottom); + } + +#ifdef SK_DEBUG + void validate() const; + void debug(bool compress_y=false) const; +#else + void validate() const {} + void debug(bool compress_y=false) const {} +#endif + +private: + class Builder; + struct RunHead; + friend class SkAAClipBlitter; + + SkIRect fBounds; + RunHead* fRunHead; + + void freeRuns(); + + bool quickContains(int left, int top, int right, int bottom) const; + + bool trimBounds(); + bool trimTopBottom(); + bool trimLeftRight(); + + // For SkAAClipBlitter and quickContains + const uint8_t* findRow(int y, int* lastYForRow = nullptr) const; + const uint8_t* findX(const uint8_t data[], int x, int* initialCount = nullptr) const; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkAAClipBlitter : public SkBlitter { +public: + SkAAClipBlitter() : fScanlineScratch(nullptr) {} + ~SkAAClipBlitter() override; + + void init(SkBlitter* blitter, const SkAAClip* aaclip) { + SkASSERT(aaclip && !aaclip->isEmpty()); + fBlitter = blitter; + fAAClip = aaclip; + fAAClipBounds = aaclip->getBounds(); + } + + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitMask(const SkMask&, const SkIRect& clip) override; + const SkPixmap* justAnOpaqueColor(uint32_t* value) override; + +private: + SkBlitter* fBlitter; + const SkAAClip* fAAClip; + SkIRect fAAClipBounds; + + // point into fScanlineScratch + int16_t* fRuns; + SkAlpha* fAA; + + enum { + kSize = 32 * 32 + }; + SkAutoSMalloc fGrayMaskScratch; // used for blitMask + void* fScanlineScratch; // enough for a mask at 32bit, or runs+aa + + void ensureRunsAndAA(); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkATrace.cpp b/gfx/skia/skia/src/core/SkATrace.cpp new file mode 100644 index 0000000000..f5c56be7b4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkATrace.cpp @@ -0,0 +1,87 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkATrace.h" + +#include "src/core/SkTraceEvent.h" +#include "src/core/SkTraceEventCommon.h" + +#ifdef SK_BUILD_FOR_ANDROID + #include +#endif + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + #include +#endif + +SkATrace::SkATrace() : fBeginSection(nullptr), fEndSection(nullptr), fIsEnabled(nullptr) { +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) + fIsEnabled = []{ return static_cast(CC_UNLIKELY(ATRACE_ENABLED())); }; + fBeginSection = [](const char* name){ ATRACE_BEGIN(name); }; + fEndSection = []{ ATRACE_END(); }; +#elif defined(SK_BUILD_FOR_ANDROID) + if (void* lib = dlopen("libandroid.so", RTLD_NOW | RTLD_LOCAL)) { + fBeginSection = (decltype(fBeginSection))dlsym(lib, "ATrace_beginSection"); + fEndSection = (decltype(fEndSection))dlsym(lib, "ATrace_endSection"); + fIsEnabled = (decltype(fIsEnabled))dlsym(lib, "ATrace_isEnabled"); + } +#endif + + if (!fIsEnabled) { + fIsEnabled = []{ return false; }; + } +} + +SkEventTracer::Handle SkATrace::addTraceEvent(char phase, + const uint8_t* categoryEnabledFlag, + const char* name, + uint64_t id, + int numArgs, + const char** argNames, + const uint8_t* argTypes, + const uint64_t* argValues, + uint8_t flags) { + if (fIsEnabled()) { + if (TRACE_EVENT_PHASE_COMPLETE == phase || + TRACE_EVENT_PHASE_INSTANT == phase) { + fBeginSection(name); + } + + if (TRACE_EVENT_PHASE_INSTANT == phase) { + fEndSection(); + } + } + return 0; +} + +void SkATrace::updateTraceEventDuration(const uint8_t* categoryEnabledFlag, + const char* name, + SkEventTracer::Handle handle) { + // This is only ever called from a scoped trace event so we will just end the ATrace section. + if (fIsEnabled()) { + fEndSection(); + } +} + +const uint8_t* SkATrace::getCategoryGroupEnabled(const char* name) { + // Chrome tracing is setup to not repeatly call this function once it has been initialized. So + // we can't use this to do a check for ATrace isEnabled(). Thus we will always return yes here + // and then check to see if ATrace is enabled when beginning and ending a section. + static uint8_t yes = SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags; + return &yes; +} + + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + +bool SkAndroidFrameworkTraceUtil::gEnableAndroidTracing = false; +bool SkAndroidFrameworkTraceUtil::gUsePerfettoTrackEvents = false; + +#endif //SK_BUILD_FOR_ANDROID_FRAMEWORK + + + diff --git a/gfx/skia/skia/src/core/SkATrace.h b/gfx/skia/skia/src/core/SkATrace.h new file mode 100644 index 0000000000..e0e642aa10 --- /dev/null +++ b/gfx/skia/skia/src/core/SkATrace.h @@ -0,0 +1,59 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkATrace_DEFINED +#define SkATrace_DEFINED + +#include "include/utils/SkEventTracer.h" + +/** + * This class is used to support ATrace in android apps. It hooks into the SkEventTracer system. It + * currently supports the macros TRACE_EVENT*, TRACE_EVENT_INSTANT*, and TRACE_EVENT_BEGIN/END*. + * For versions of these calls that take additoinal args and value pairs we currently just drop them + * and report only the name. Since ATrace is a simple push and pop system (all traces are fully + * nested), if using BEGIN and END you should also make sure your calls are properly nested (i.e. if + * startA is before startB, then endB is before endA). + */ +class SkATrace : public SkEventTracer { +public: + SkATrace(); + + SkEventTracer::Handle addTraceEvent(char phase, + const uint8_t* categoryEnabledFlag, + const char* name, + uint64_t id, + int numArgs, + const char** argNames, + const uint8_t* argTypes, + const uint64_t* argValues, + uint8_t flags) override; + + + void updateTraceEventDuration(const uint8_t* categoryEnabledFlag, + const char* name, + SkEventTracer::Handle handle) override; + + const uint8_t* getCategoryGroupEnabled(const char* name) override; + + const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag) override { + static const char* category = "skiaATrace"; + return category; + } + + // Atrace does not yet support splitting up trace output into sections. + void newTracingSection(const char* name) override {} + +private: + SkATrace(const SkATrace&) = delete; + SkATrace& operator=(const SkATrace&) = delete; + + void (*fBeginSection)(const char*); + void (*fEndSection)(void); + bool (*fIsEnabled)(void); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkAdvancedTypefaceMetrics.h b/gfx/skia/skia/src/core/SkAdvancedTypefaceMetrics.h new file mode 100644 index 0000000000..4c05ce2184 --- /dev/null +++ b/gfx/skia/skia/src/core/SkAdvancedTypefaceMetrics.h @@ -0,0 +1,74 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAdvancedTypefaceMetrics_DEFINED +#define SkAdvancedTypefaceMetrics_DEFINED + +#include "include/core/SkRect.h" +#include "include/core/SkString.h" +#include "include/private/SkBitmaskEnum.h" + +/** \class SkAdvancedTypefaceMetrics + + The SkAdvancedTypefaceMetrics class is used by the PDF backend to correctly + embed typefaces. This class is created and filled in with information by + SkTypeface::getAdvancedMetrics. +*/ +struct SkAdvancedTypefaceMetrics { + // The PostScript name of the font. See `FontName` and `BaseFont` in PDF standard. + SkString fPostScriptName; + SkString fFontName; + + // These enum values match the values used in the PDF file format. + enum StyleFlags : uint32_t { + kFixedPitch_Style = 0x00000001, + kSerif_Style = 0x00000002, + kScript_Style = 0x00000008, + kItalic_Style = 0x00000040, + kAllCaps_Style = 0x00010000, + kSmallCaps_Style = 0x00020000, + kForceBold_Style = 0x00040000 + }; + StyleFlags fStyle = (StyleFlags)0; // Font style characteristics. + + enum FontType : uint8_t { + kType1_Font, + kType1CID_Font, + kCFF_Font, + kTrueType_Font, + kOther_Font, + }; + // The type of the underlying font program. This field determines which + // of the following fields are valid. If it is kOther_Font the per glyph + // information will never be populated. + FontType fType = kOther_Font; + + enum FontFlags : uint8_t { + kVariable_FontFlag = 1 << 0, //! struct is_bitmask_enum : std::true_type {}; +template <> struct is_bitmask_enum : std::true_type {}; +} // namespace sknonstd + +#endif diff --git a/gfx/skia/skia/src/core/SkAlphaRuns.cpp b/gfx/skia/skia/src/core/SkAlphaRuns.cpp new file mode 100644 index 0000000000..ce1e42192d --- /dev/null +++ b/gfx/skia/skia/src/core/SkAlphaRuns.cpp @@ -0,0 +1,78 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkTo.h" +#include "src/core/SkAntiRun.h" +#include "src/core/SkOpts.h" + +void SkAlphaRuns::reset(int width) { + SkASSERT(width > 0); + +#ifdef SK_DEBUG +#ifndef SK_DISABLE_SLOW_DEBUG_VALIDATION + SkOpts::memset16((uint16_t*)fRuns, (uint16_t)(-42), width); +#endif +#endif + fRuns[0] = SkToS16(width); + fRuns[width] = 0; + fAlpha[0] = 0; + + SkDEBUGCODE(fWidth = width;) + SkDEBUGCODE(this->validate();) +} + +#ifdef SK_DEBUG + void SkAlphaRuns::assertValid(int y, int maxStep) const { +#ifndef SK_DISABLE_SLOW_DEBUG_VALIDATION + int max = (y + 1) * maxStep - (y == maxStep - 1); + + const int16_t* runs = fRuns; + const uint8_t* alpha = fAlpha; + + while (*runs) { + SkASSERT(*alpha <= max); + alpha += *runs; + runs += *runs; + } +#endif + } + + void SkAlphaRuns::dump() const { + const int16_t* runs = fRuns; + const uint8_t* alpha = fAlpha; + + SkDebugf("Runs"); + while (*runs) { + int n = *runs; + + SkDebugf(" %02x", *alpha); + if (n > 1) { + SkDebugf(",%d", n); + } + alpha += n; + runs += n; + } + SkDebugf("\n"); + } + + void SkAlphaRuns::validate() const { +#ifndef SK_DISABLE_SLOW_DEBUG_VALIDATION + SkASSERT(fWidth > 0); + + int count = 0; + const int16_t* runs = fRuns; + + while (*runs) { + SkASSERT(*runs > 0); + count += *runs; + SkASSERT(count <= fWidth); + runs += *runs; + } + SkASSERT(count == fWidth); +#endif + } +#endif diff --git a/gfx/skia/skia/src/core/SkAnalyticEdge.cpp b/gfx/skia/skia/src/core/SkAnalyticEdge.cpp new file mode 100644 index 0000000000..16b31bf356 --- /dev/null +++ b/gfx/skia/skia/src/core/SkAnalyticEdge.cpp @@ -0,0 +1,438 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkTo.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkAnalyticEdge.h" +#include "src/core/SkFDot6.h" +#include + +static const int kInverseTableSize = 1024; // SK_FDot6One * 16 + +static inline SkFixed quick_inverse(SkFDot6 x) { + static const int32_t table[] = { + -4096, -4100, -4104, -4108, -4112, -4116, -4120, -4124, -4128, -4132, -4136, + -4140, -4144, -4148, -4152, -4156, -4161, -4165, -4169, -4173, -4177, -4181, + -4185, -4190, -4194, -4198, -4202, -4206, -4211, -4215, -4219, -4223, -4228, + -4232, -4236, -4240, -4245, -4249, -4253, -4258, -4262, -4266, -4271, -4275, + -4279, -4284, -4288, -4293, -4297, -4301, -4306, -4310, -4315, -4319, -4324, + -4328, -4332, -4337, -4341, -4346, -4350, -4355, -4359, -4364, -4369, -4373, + -4378, -4382, -4387, -4391, -4396, -4401, -4405, -4410, -4415, -4419, -4424, + -4429, -4433, -4438, -4443, -4447, -4452, -4457, -4462, -4466, -4471, -4476, + -4481, -4485, -4490, -4495, -4500, -4505, -4510, -4514, -4519, -4524, -4529, + -4534, -4539, -4544, -4549, -4554, -4559, -4563, -4568, -4573, -4578, -4583, + -4588, -4593, -4599, -4604, -4609, -4614, -4619, -4624, -4629, -4634, -4639, + -4644, -4650, -4655, -4660, -4665, -4670, -4675, -4681, -4686, -4691, -4696, + -4702, -4707, -4712, -4718, -4723, -4728, -4733, -4739, -4744, -4750, -4755, + -4760, -4766, -4771, -4777, -4782, -4788, -4793, -4798, -4804, -4809, -4815, + -4821, -4826, -4832, -4837, -4843, -4848, -4854, -4860, -4865, -4871, -4877, + -4882, -4888, -4894, -4899, -4905, -4911, -4917, -4922, -4928, -4934, -4940, + -4946, -4951, -4957, -4963, -4969, -4975, -4981, -4987, -4993, -4999, -5005, + -5011, -5017, -5023, -5029, -5035, -5041, -5047, -5053, -5059, -5065, -5071, + -5077, -5084, -5090, -5096, -5102, -5108, -5115, -5121, -5127, -5133, -5140, + -5146, -5152, -5159, -5165, -5171, -5178, -5184, -5190, -5197, -5203, -5210, + -5216, -5223, -5229, -5236, -5242, -5249, -5256, -5262, -5269, -5275, -5282, + -5289, -5295, -5302, -5309, -5315, -5322, -5329, -5336, -5343, -5349, -5356, + -5363, -5370, -5377, -5384, -5391, -5398, -5405, -5412, -5418, -5426, -5433, + -5440, -5447, -5454, -5461, -5468, -5475, -5482, -5489, -5497, -5504, -5511, + -5518, -5526, -5533, -5540, -5548, -5555, -5562, -5570, -5577, -5584, -5592, + -5599, -5607, -5614, -5622, -5629, -5637, -5645, -5652, -5660, -5667, -5675, + -5683, -5691, -5698, -5706, -5714, -5722, -5729, -5737, -5745, -5753, -5761, + -5769, -5777, -5785, -5793, -5801, -5809, -5817, -5825, -5833, -5841, -5849, + -5857, -5866, -5874, -5882, -5890, -5899, -5907, -5915, -5924, -5932, -5940, + -5949, -5957, -5966, -5974, -5983, -5991, -6000, -6009, -6017, -6026, -6034, + -6043, -6052, -6061, -6069, -6078, -6087, -6096, -6105, -6114, -6123, -6132, + -6141, -6150, -6159, -6168, -6177, -6186, -6195, -6204, -6213, -6223, -6232, + -6241, -6250, -6260, -6269, -6278, -6288, -6297, -6307, -6316, -6326, -6335, + -6345, -6355, -6364, -6374, -6384, -6393, -6403, -6413, -6423, -6432, -6442, + -6452, -6462, -6472, -6482, -6492, -6502, -6512, -6523, -6533, -6543, -6553, + -6563, -6574, -6584, -6594, -6605, -6615, -6626, -6636, -6647, -6657, -6668, + -6678, -6689, -6700, -6710, -6721, -6732, -6743, -6754, -6765, -6775, -6786, + -6797, -6808, -6820, -6831, -6842, -6853, -6864, -6875, -6887, -6898, -6909, + -6921, -6932, -6944, -6955, -6967, -6978, -6990, -7002, -7013, -7025, -7037, + -7049, -7061, -7073, -7084, -7096, -7108, -7121, -7133, -7145, -7157, -7169, + -7182, -7194, -7206, -7219, -7231, -7244, -7256, -7269, -7281, -7294, -7307, + -7319, -7332, -7345, -7358, -7371, -7384, -7397, -7410, -7423, -7436, -7449, + -7463, -7476, -7489, -7503, -7516, -7530, -7543, -7557, -7570, -7584, -7598, + -7612, -7626, -7639, -7653, -7667, -7681, -7695, -7710, -7724, -7738, -7752, + -7767, -7781, -7796, -7810, -7825, -7839, -7854, -7869, -7884, -7898, -7913, + -7928, -7943, -7958, -7973, -7989, -8004, -8019, -8035, -8050, -8065, -8081, + -8097, -8112, -8128, -8144, -8160, -8176, -8192, -8208, -8224, -8240, -8256, + -8272, -8289, -8305, -8322, -8338, -8355, -8371, -8388, -8405, -8422, -8439, + -8456, -8473, -8490, -8507, -8525, -8542, -8559, -8577, -8594, -8612, -8630, + -8648, -8665, -8683, -8701, -8719, -8738, -8756, -8774, -8793, -8811, -8830, + -8848, -8867, -8886, -8905, -8924, -8943, -8962, -8981, -9000, -9020, -9039, + -9058, -9078, -9098, -9118, -9137, -9157, -9177, -9198, -9218, -9238, -9258, + -9279, -9300, -9320, -9341, -9362, -9383, -9404, -9425, -9446, -9467, -9489, + -9510, -9532, -9554, -9576, -9597, -9619, -9642, -9664, -9686, -9709, -9731, + -9754, -9776, -9799, -9822, -9845, -9868, -9892, -9915, -9939, -9962, -9986, + -10010, -10034, -10058, -10082, -10106, -10131, -10155, -10180, -10205, -10230, + -10255, -10280, -10305, -10330, -10356, -10381, -10407, -10433, -10459, -10485, + -10512, -10538, -10564, -10591, -10618, -10645, -10672, -10699, -10727, -10754, + -10782, -10810, -10837, -10866, -10894, -10922, -10951, -10979, -11008, -11037, + -11066, -11096, -11125, -11155, -11184, -11214, -11244, -11275, -11305, -11335, + -11366, -11397, -11428, -11459, -11491, -11522, -11554, -11586, -11618, -11650, + -11683, -11715, -11748, -11781, -11814, -11848, -11881, -11915, -11949, -11983, + -12018, -12052, -12087, -12122, -12157, -12192, -12228, -12264, -12300, -12336, + -12372, -12409, -12446, -12483, -12520, -12557, -12595, -12633, -12671, -12710, + -12748, -12787, -12826, -12865, -12905, -12945, -12985, -13025, -13066, -13107, + -13148, -13189, -13231, -13273, -13315, -13357, -13400, -13443, -13486, -13530, + -13573, -13617, -13662, -13706, -13751, -13797, -13842, -13888, -13934, -13981, + -14027, -14074, -14122, -14169, -14217, -14266, -14315, -14364, -14413, -14463, + -14513, -14563, -14614, -14665, -14716, -14768, -14820, -14873, -14926, -14979, + -15033, -15087, -15141, -15196, -15252, -15307, -15363, -15420, -15477, -15534, + -15592, -15650, -15709, -15768, -15827, -15887, -15947, -16008, -16070, -16131, + -16194, -16256, -16320, -16384, -16448, -16513, -16578, -16644, -16710, -16777, + -16844, -16912, -16980, -17050, -17119, -17189, -17260, -17331, -17403, -17476, + -17549, -17623, -17697, -17772, -17848, -17924, -18001, -18078, -18157, -18236, + -18315, -18396, -18477, -18558, -18641, -18724, -18808, -18893, -18978, -19065, + -19152, -19239, -19328, -19418, -19508, -19599, -19691, -19784, -19878, -19972, + -20068, -20164, -20262, -20360, -20460, -20560, -20661, -20763, -20867, -20971, + -21076, -21183, -21290, -21399, -21509, -21620, -21732, -21845, -21959, -22075, + -22192, -22310, -22429, -22550, -22671, -22795, -22919, -23045, -23172, -23301, + -23431, -23563, -23696, -23831, -23967, -24105, -24244, -24385, -24528, -24672, + -24818, -24966, -25115, -25266, -25420, -25575, -25731, -25890, -26051, -26214, + -26379, -26546, -26715, -26886, -27060, -27235, -27413, -27594, -27776, -27962, + -28149, -28339, -28532, -28728, -28926, -29127, -29330, -29537, -29746, -29959, + -30174, -30393, -30615, -30840, -31068, -31300, -31536, -31775, -32017, -32263, + -32513, -32768, -33026, -33288, -33554, -33825, -34100, -34379, -34663, -34952, + -35246, -35544, -35848, -36157, -36472, -36792, -37117, -37449, -37786, -38130, + -38479, -38836, -39199, -39568, -39945, -40329, -40721, -41120, -41527, -41943, + -42366, -42799, -43240, -43690, -44150, -44620, -45100, -45590, -46091, -46603, + -47127, -47662, -48210, -48770, -49344, -49932, -50533, -51150, -51781, -52428, + -53092, -53773, -54471, -55188, -55924, -56679, -57456, -58254, -59074, -59918, + -60787, -61680, -62601, -63550, -64527, -65536, -66576, -67650, -68759, -69905, + -71089, -72315, -73584, -74898, -76260, -77672, -79137, -80659, -82241, -83886, + -85598, -87381, -89240, -91180, -93206, -95325, -97541, -99864, -102300, + -104857, -107546, -110376, -113359, -116508, -119837, -123361, -127100, -131072, + -135300, -139810, -144631, -149796, -155344, -161319, -167772, -174762, -182361, + -190650, -199728, -209715, -220752, -233016, -246723, -262144, -279620, -299593, + -322638, -349525, -381300, -419430, -466033, -524288, -599186, -699050, -838860, + -1048576, -1398101, -2097152, -4194304, 0 + }; + + static constexpr size_t kLastEntry = std::size(table) - 1; + SkASSERT(SkAbs32(x) <= static_cast(kLastEntry)); + static_assert(kLastEntry == kInverseTableSize); + + if (x > 0) { + return -table[kLastEntry - x]; + } else { + return table[kLastEntry + x]; + } +} + +static inline SkFixed quick_div(SkFDot6 a, SkFDot6 b) { + const int kMinBits = 3; // abs(b) should be at least (1 << kMinBits) for quick division + const int kMaxBits = 31; // Number of bits available in signed int + // Given abs(b) <= (1 << kMinBits), the inverse of abs(b) is at most 1 << (22 - kMinBits) in + // SkFixed format. Hence abs(a) should be less than kMaxAbsA + const int kMaxAbsA = 1 << (kMaxBits - (22 - kMinBits)); + SkFDot6 abs_a = SkAbs32(a); + SkFDot6 abs_b = SkAbs32(b); + if (abs_b >= (1 << kMinBits) && abs_b < kInverseTableSize && abs_a < kMaxAbsA) { + SkASSERT((int64_t)a * quick_inverse(b) <= SK_MaxS32 + && (int64_t)a * quick_inverse(b) >= SK_MinS32); + SkFixed ourAnswer = (a * quick_inverse(b)) >> 6; + SkASSERT( + (SkFDot6Div(a,b) == 0 && ourAnswer == 0) || + SkFixedDiv(SkAbs32(SkFDot6Div(a,b) - ourAnswer), SkAbs32(SkFDot6Div(a,b))) <= 1 << 10 + ); + return ourAnswer; + } + return SkFDot6Div(a, b); +} + +bool SkAnalyticEdge::setLine(const SkPoint& p0, const SkPoint& p1) { + fRiteE = nullptr; + + // We must set X/Y using the same way (e.g., times 4, to FDot6, then to Fixed) as Quads/Cubics. + // Otherwise the order of the edge might be wrong due to precision limit. + const int accuracy = kDefaultAccuracy; +#ifdef SK_RASTERIZE_EVEN_ROUNDING + SkFixed x0 = SkFDot6ToFixed(SkScalarRoundToFDot6(p0.fX, accuracy)) >> accuracy; + SkFixed y0 = SnapY(SkFDot6ToFixed(SkScalarRoundToFDot6(p0.fY, accuracy)) >> accuracy); + SkFixed x1 = SkFDot6ToFixed(SkScalarRoundToFDot6(p1.fX, accuracy)) >> accuracy; + SkFixed y1 = SnapY(SkFDot6ToFixed(SkScalarRoundToFDot6(p1.fY, accuracy)) >> accuracy); +#else + const int multiplier = (1 << kDefaultAccuracy); + SkFixed x0 = SkFDot6ToFixed(SkScalarToFDot6(p0.fX * multiplier)) >> accuracy; + SkFixed y0 = SnapY(SkFDot6ToFixed(SkScalarToFDot6(p0.fY * multiplier)) >> accuracy); + SkFixed x1 = SkFDot6ToFixed(SkScalarToFDot6(p1.fX * multiplier)) >> accuracy; + SkFixed y1 = SnapY(SkFDot6ToFixed(SkScalarToFDot6(p1.fY * multiplier)) >> accuracy); +#endif + + int winding = 1; + + if (y0 > y1) { + using std::swap; + swap(x0, x1); + swap(y0, y1); + winding = -1; + } + + // are we a zero-height line? + SkFDot6 dy = SkFixedToFDot6(y1 - y0); + if (dy == 0) { + return false; + } + SkFDot6 dx = SkFixedToFDot6(x1 - x0); + SkFixed slope = quick_div(dx, dy); + SkFixed absSlope = SkAbs32(slope); + + fX = x0; + fDX = slope; + fUpperX = x0; + fY = y0; + fUpperY = y0; + fLowerY = y1; + fDY = dx == 0 || slope == 0 ? SK_MaxS32 : absSlope < kInverseTableSize + ? quick_inverse(absSlope) + : SkAbs32(quick_div(dy, dx)); + fEdgeType = kLine_Type; + fCurveCount = 0; + fWinding = SkToS8(winding); + fCurveShift = 0; + + return true; +} + +// This will become a bottleneck for small ovals rendering if we call SkFixedDiv twice here. +// Therefore, we'll let the outter function compute the slope once and send in the value. +// Moreover, we'll compute fDY by quickly lookup the inverse table (if possible). +bool SkAnalyticEdge::updateLine(SkFixed x0, SkFixed y0, SkFixed x1, SkFixed y1, SkFixed slope) { + // Since we send in the slope, we can no longer snap y inside this function. + // If we don't send in the slope, or we do some more sophisticated snapping, this function + // could be a performance bottleneck. + SkASSERT(fWinding == 1 || fWinding == -1); + SkASSERT(fCurveCount != 0); + + // We don't chop at y extrema for cubics so the y is not guaranteed to be increasing for them. + // In that case, we have to swap x/y and negate the winding. + if (y0 > y1) { + using std::swap; + swap(x0, x1); + swap(y0, y1); + fWinding = -fWinding; + } + + SkASSERT(y0 <= y1); + + SkFDot6 dx = SkFixedToFDot6(x1 - x0); + SkFDot6 dy = SkFixedToFDot6(y1 - y0); + + // are we a zero-height line? + if (dy == 0) { + return false; + } + + SkASSERT(slope < SK_MaxS32); + + SkFDot6 absSlope = SkAbs32(SkFixedToFDot6(slope)); + fX = x0; + fDX = slope; + fUpperX = x0; + fY = y0; + fUpperY = y0; + fLowerY = y1; + fDY = (dx == 0 || slope == 0) + ? SK_MaxS32 + : absSlope < kInverseTableSize + ? quick_inverse(absSlope) + : SkAbs32(quick_div(dy, dx)); + + return true; +} + +bool SkAnalyticEdge::update(SkFixed last_y, bool sortY) { + SkASSERT(last_y >= fLowerY); // we shouldn't update edge if last_y < fLowerY + if (fCurveCount < 0) { + return static_cast(this)->updateCubic(sortY); + } else if (fCurveCount > 0) { + return static_cast(this)->updateQuadratic(); + } + return false; +} + +bool SkAnalyticQuadraticEdge::setQuadratic(const SkPoint pts[3]) { + fRiteE = nullptr; + + if (!fQEdge.setQuadraticWithoutUpdate(pts, kDefaultAccuracy)) { + return false; + } + fQEdge.fQx >>= kDefaultAccuracy; + fQEdge.fQy >>= kDefaultAccuracy; + fQEdge.fQDx >>= kDefaultAccuracy; + fQEdge.fQDy >>= kDefaultAccuracy; + fQEdge.fQDDx >>= kDefaultAccuracy; + fQEdge.fQDDy >>= kDefaultAccuracy; + fQEdge.fQLastX >>= kDefaultAccuracy; + fQEdge.fQLastY >>= kDefaultAccuracy; + fQEdge.fQy = SnapY(fQEdge.fQy); + fQEdge.fQLastY = SnapY(fQEdge.fQLastY); + + fWinding = fQEdge.fWinding; + fEdgeType = kQuad_Type; + fCurveCount = fQEdge.fCurveCount; + fCurveShift = fQEdge.fCurveShift; + + fSnappedX = fQEdge.fQx; + fSnappedY = fQEdge.fQy; + + return this->updateQuadratic(); +} + +bool SkAnalyticQuadraticEdge::updateQuadratic() { + int success = 0; // initialize to fail! + int count = fCurveCount; + SkFixed oldx = fQEdge.fQx; + SkFixed oldy = fQEdge.fQy; + SkFixed dx = fQEdge.fQDx; + SkFixed dy = fQEdge.fQDy; + SkFixed newx, newy, newSnappedX, newSnappedY; + int shift = fCurveShift; + + SkASSERT(count > 0); + + do { + SkFixed slope; + if (--count > 0) + { + newx = oldx + (dx >> shift); + newy = oldy + (dy >> shift); + if (SkAbs32(dy >> shift) >= SK_Fixed1 * 2) { // only snap when dy is large enough + SkFDot6 diffY = SkFixedToFDot6(newy - fSnappedY); + slope = diffY ? quick_div(SkFixedToFDot6(newx - fSnappedX), diffY) + : SK_MaxS32; + newSnappedY = std::min(fQEdge.fQLastY, SkFixedRoundToFixed(newy)); + newSnappedX = newx - SkFixedMul(slope, newy - newSnappedY); + } else { + newSnappedY = std::min(fQEdge.fQLastY, SnapY(newy)); + newSnappedX = newx; + SkFDot6 diffY = SkFixedToFDot6(newSnappedY - fSnappedY); + slope = diffY ? quick_div(SkFixedToFDot6(newx - fSnappedX), diffY) + : SK_MaxS32; + } + dx += fQEdge.fQDDx; + dy += fQEdge.fQDDy; + } + else // last segment + { + newx = fQEdge.fQLastX; + newy = fQEdge.fQLastY; + newSnappedY = newy; + newSnappedX = newx; + SkFDot6 diffY = (newy - fSnappedY) >> 10; + slope = diffY ? quick_div((newx - fSnappedX) >> 10, diffY) : SK_MaxS32; + } + if (slope < SK_MaxS32) { + success = this->updateLine(fSnappedX, fSnappedY, newSnappedX, newSnappedY, slope); + } + oldx = newx; + oldy = newy; + } while (count > 0 && !success); + + SkASSERT(newSnappedY <= fQEdge.fQLastY); + + fQEdge.fQx = newx; + fQEdge.fQy = newy; + fQEdge.fQDx = dx; + fQEdge.fQDy = dy; + fSnappedX = newSnappedX; + fSnappedY = newSnappedY; + fCurveCount = SkToS8(count); + return success; +} + +bool SkAnalyticCubicEdge::setCubic(const SkPoint pts[4], bool sortY) { + fRiteE = nullptr; + + if (!fCEdge.setCubicWithoutUpdate(pts, kDefaultAccuracy, sortY)) { + return false; + } + + fCEdge.fCx >>= kDefaultAccuracy; + fCEdge.fCy >>= kDefaultAccuracy; + fCEdge.fCDx >>= kDefaultAccuracy; + fCEdge.fCDy >>= kDefaultAccuracy; + fCEdge.fCDDx >>= kDefaultAccuracy; + fCEdge.fCDDy >>= kDefaultAccuracy; + fCEdge.fCDDDx >>= kDefaultAccuracy; + fCEdge.fCDDDy >>= kDefaultAccuracy; + fCEdge.fCLastX >>= kDefaultAccuracy; + fCEdge.fCLastY >>= kDefaultAccuracy; + fCEdge.fCy = SnapY(fCEdge.fCy); + fCEdge.fCLastY = SnapY(fCEdge.fCLastY); + + fWinding = fCEdge.fWinding; + fEdgeType = kCubic_Type; + fCurveCount = fCEdge.fCurveCount; + fCurveShift = fCEdge.fCurveShift; + fCubicDShift = fCEdge.fCubicDShift; + + fSnappedY = fCEdge.fCy; + + return this->updateCubic(sortY); +} + +bool SkAnalyticCubicEdge::updateCubic(bool sortY) { + int success; + int count = fCurveCount; + SkFixed oldx = fCEdge.fCx; + SkFixed oldy = fCEdge.fCy; + SkFixed newx, newy; + const int ddshift = fCurveShift; + const int dshift = fCubicDShift; + + SkASSERT(count < 0); + + do { + if (++count < 0) { + newx = oldx + (fCEdge.fCDx >> dshift); + fCEdge.fCDx += fCEdge.fCDDx >> ddshift; + fCEdge.fCDDx += fCEdge.fCDDDx; + + newy = oldy + (fCEdge.fCDy >> dshift); + fCEdge.fCDy += fCEdge.fCDDy >> ddshift; + fCEdge.fCDDy += fCEdge.fCDDDy; + } + else { // last segment + newx = fCEdge.fCLastX; + newy = fCEdge.fCLastY; + } + + // we want to say SkASSERT(oldy <= newy), but our finite fixedpoint + // doesn't always achieve that, so we have to explicitly pin it here. + if (sortY && newy < oldy) { + newy = oldy; + } + + SkFixed newSnappedY = SnapY(newy); + // we want to SkASSERT(snappedNewY <= fCEdge.fCLastY), but our finite fixedpoint + // doesn't always achieve that, so we have to explicitly pin it here. + if (sortY && fCEdge.fCLastY < newSnappedY) { + newSnappedY = fCEdge.fCLastY; + count = 0; + } + + SkFixed slope = SkFixedToFDot6(newSnappedY - fSnappedY) == 0 + ? SK_MaxS32 + : SkFDot6Div(SkFixedToFDot6(newx - oldx), + SkFixedToFDot6(newSnappedY - fSnappedY)); + + success = this->updateLine(oldx, fSnappedY, newx, newSnappedY, slope); + + oldx = newx; + oldy = newy; + fSnappedY = newSnappedY; + } while (count < 0 && !success); + + fCEdge.fCx = newx; + fCEdge.fCy = newy; + fCurveCount = SkToS8(count); + return success; +} diff --git a/gfx/skia/skia/src/core/SkAnalyticEdge.h b/gfx/skia/skia/src/core/SkAnalyticEdge.h new file mode 100644 index 0000000000..eb2fa56755 --- /dev/null +++ b/gfx/skia/skia/src/core/SkAnalyticEdge.h @@ -0,0 +1,141 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAnalyticEdge_DEFINED +#define SkAnalyticEdge_DEFINED + +#include "include/private/base/SkTo.h" +#include "src/core/SkEdge.h" + +#include + +struct SkAnalyticEdge { + // Similar to SkEdge, the conic edges will be converted to quadratic edges + enum Type { + kLine_Type, + kQuad_Type, + kCubic_Type + }; + + SkAnalyticEdge* fNext; + SkAnalyticEdge* fPrev; + + // During aaa_walk_edges, if this edge is a left edge, + // then fRiteE is its corresponding right edge. Otherwise it's nullptr. + SkAnalyticEdge* fRiteE; + + SkFixed fX; + SkFixed fDX; + SkFixed fUpperX; // The x value when y = fUpperY + SkFixed fY; // The current y + SkFixed fUpperY; // The upper bound of y (our edge is from y = fUpperY to y = fLowerY) + SkFixed fLowerY; // The lower bound of y (our edge is from y = fUpperY to y = fLowerY) + SkFixed fDY; // abs(1/fDX); may be SK_MaxS32 when fDX is close to 0. + // fDY is only used for blitting trapezoids. + + SkFixed fSavedX; // For deferred blitting + SkFixed fSavedY; // For deferred blitting + SkFixed fSavedDY; // For deferred blitting + + Type fEdgeType; // Remembers the *initial* edge type + + int8_t fCurveCount; // only used by kQuad(+) and kCubic(-) + uint8_t fCurveShift; // appled to all Dx/DDx/DDDx except for fCubicDShift exception + uint8_t fCubicDShift; // applied to fCDx and fCDy only in cubic + int8_t fWinding; // 1 or -1 + + static const int kDefaultAccuracy = 2; // default accuracy for snapping + + static inline SkFixed SnapY(SkFixed y) { + const int accuracy = kDefaultAccuracy; + // This approach is safer than left shift, round, then right shift + return ((unsigned)y + (SK_Fixed1 >> (accuracy + 1))) >> (16 - accuracy) << (16 - accuracy); + } + + // Update fX, fY of this edge so fY = y + inline void goY(SkFixed y) { + if (y == fY + SK_Fixed1) { + fX = fX + fDX; + fY = y; + } else if (y != fY) { + // Drop lower digits as our alpha only has 8 bits + // (fDX and y - fUpperY may be greater than SK_Fixed1) + fX = fUpperX + SkFixedMul(fDX, y - fUpperY); + fY = y; + } + } + + inline void goY(SkFixed y, int yShift) { + SkASSERT(yShift >= 0 && yShift <= kDefaultAccuracy); + SkASSERT(fDX == 0 || y - fY == SK_Fixed1 >> yShift); + fY = y; + fX += fDX >> yShift; + } + + inline void saveXY(SkFixed x, SkFixed y, SkFixed dY) { + fSavedX = x; + fSavedY = y; + fSavedDY = dY; + } + + bool setLine(const SkPoint& p0, const SkPoint& p1); + bool updateLine(SkFixed ax, SkFixed ay, SkFixed bx, SkFixed by, SkFixed slope); + + // return true if we're NOT done with this edge + bool update(SkFixed last_y, bool sortY = true); + +#ifdef SK_DEBUG + void dump() const { + SkDebugf("edge: upperY:%d lowerY:%d y:%g x:%g dx:%g w:%d\n", + fUpperY, fLowerY, SkFixedToFloat(fY), SkFixedToFloat(fX), + SkFixedToFloat(fDX), fWinding); + } + + void validate() const { + SkASSERT(fPrev && fNext); + SkASSERT(fPrev->fNext == this); + SkASSERT(fNext->fPrev == this); + + SkASSERT(fUpperY < fLowerY); + SkASSERT(SkAbs32(fWinding) == 1); + } +#endif +}; + +struct SkAnalyticQuadraticEdge : public SkAnalyticEdge { + SkQuadraticEdge fQEdge; + + // snap y to integer points in the middle of the curve to accelerate AAA path filling + SkFixed fSnappedX, fSnappedY; + + bool setQuadratic(const SkPoint pts[3]); + bool updateQuadratic(); + inline void keepContinuous() { + // We use fX as the starting x to ensure the continuouty. + // Without it, we may break the sorted edge list. + SkASSERT(SkAbs32(fX - SkFixedMul(fY - fSnappedY, fDX) - fSnappedX) < SK_Fixed1); + SkASSERT(SkAbs32(fY - fSnappedY) < SK_Fixed1); // This may differ due to smooth jump + fSnappedX = fX; + fSnappedY = fY; + } +}; + +struct SkAnalyticCubicEdge : public SkAnalyticEdge { + SkCubicEdge fCEdge; + + SkFixed fSnappedY; // to make sure that y is increasing with smooth jump and snapping + + bool setCubic(const SkPoint pts[4], bool sortY = true); + bool updateCubic(bool sortY = true); + inline void keepContinuous() { + SkASSERT(SkAbs32(fX - SkFixedMul(fDX, fY - SnapY(fCEdge.fCy)) - fCEdge.fCx) < SK_Fixed1); + fCEdge.fCx = fX; + fSnappedY = fY; + } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkAnnotation.cpp b/gfx/skia/skia/src/core/SkAnnotation.cpp new file mode 100644 index 0000000000..9af344871d --- /dev/null +++ b/gfx/skia/skia/src/core/SkAnnotation.cpp @@ -0,0 +1,48 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAnnotation.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "src/core/SkAnnotationKeys.h" + +const char* SkAnnotationKeys::URL_Key() { + return "SkAnnotationKey_URL"; +} + +const char* SkAnnotationKeys::Define_Named_Dest_Key() { + return "SkAnnotationKey_Define_Named_Dest"; +} + +const char* SkAnnotationKeys::Link_Named_Dest_Key() { + return "SkAnnotationKey_Link_Named_Dest"; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkAnnotateRectWithURL(SkCanvas* canvas, const SkRect& rect, SkData* value) { + if (nullptr == value) { + return; + } + canvas->drawAnnotation(rect, SkAnnotationKeys::URL_Key(), value); +} + +void SkAnnotateNamedDestination(SkCanvas* canvas, const SkPoint& point, SkData* name) { + if (nullptr == name) { + return; + } + const SkRect rect = SkRect::MakeXYWH(point.x(), point.y(), 0, 0); + canvas->drawAnnotation(rect, SkAnnotationKeys::Define_Named_Dest_Key(), name); +} + +void SkAnnotateLinkToDestination(SkCanvas* canvas, const SkRect& rect, SkData* name) { + if (nullptr == name) { + return; + } + canvas->drawAnnotation(rect, SkAnnotationKeys::Link_Named_Dest_Key(), name); +} diff --git a/gfx/skia/skia/src/core/SkAnnotationKeys.h b/gfx/skia/skia/src/core/SkAnnotationKeys.h new file mode 100644 index 0000000000..90fdc6d30a --- /dev/null +++ b/gfx/skia/skia/src/core/SkAnnotationKeys.h @@ -0,0 +1,33 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAnnotationKeys_DEFINED +#define SkAnnotationKeys_DEFINED + +#include "include/core/SkTypes.h" + +class SkAnnotationKeys { +public: + /** + * Returns the canonical key whose payload is a URL + */ + static const char* URL_Key(); + + /** + * Returns the canonical key whose payload is the name of a destination to + * be defined. + */ + static const char* Define_Named_Dest_Key(); + + /** + * Returns the canonical key whose payload is the name of a destination to + * be linked to. + */ + static const char* Link_Named_Dest_Key(); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkAntiRun.h b/gfx/skia/skia/src/core/SkAntiRun.h new file mode 100644 index 0000000000..5a9800b796 --- /dev/null +++ b/gfx/skia/skia/src/core/SkAntiRun.h @@ -0,0 +1,196 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAntiRun_DEFINED +#define SkAntiRun_DEFINED + +#include "include/private/base/SkTo.h" +#include "src/core/SkBlitter.h" + +/** Sparse array of run-length-encoded alpha (supersampling coverage) values. + Sparseness allows us to independently compose several paths into the + same SkAlphaRuns buffer. +*/ + +class SkAlphaRuns { +public: + int16_t* fRuns; + uint8_t* fAlpha; + + // Return 0-255 given 0-256 + static inline SkAlpha CatchOverflow(int alpha) { + SkASSERT(alpha >= 0 && alpha <= 256); + return alpha - (alpha >> 8); + } + + /// Returns true if the scanline contains only a single run, + /// of alpha value 0. + bool empty() const { + SkASSERT(fRuns[0] > 0); + return fAlpha[0] == 0 && fRuns[fRuns[0]] == 0; + } + + /// Reinitialize for a new scanline. + void reset(int width); + + /** + * Insert into the buffer a run starting at (x-offsetX): + * if startAlpha > 0 + * one pixel with value += startAlpha, + * max 255 + * if middleCount > 0 + * middleCount pixels with value += maxValue + * if stopAlpha > 0 + * one pixel with value += stopAlpha + * Returns the offsetX value that should be passed on the next call, + * assuming we're on the same scanline. If the caller is switching + * scanlines, then offsetX should be 0 when this is called. + */ + SK_ALWAYS_INLINE int add(int x, U8CPU startAlpha, int middleCount, U8CPU stopAlpha, + U8CPU maxValue, int offsetX) { + SkASSERT(middleCount >= 0); + SkASSERT(x >= 0 && x + (startAlpha != 0) + middleCount + (stopAlpha != 0) <= fWidth); + + SkASSERT(fRuns[offsetX] >= 0); + + int16_t* runs = fRuns + offsetX; + uint8_t* alpha = fAlpha + offsetX; + uint8_t* lastAlpha = alpha; + x -= offsetX; + + if (startAlpha) { + SkAlphaRuns::Break(runs, alpha, x, 1); + /* I should be able to just add alpha[x] + startAlpha. + However, if the trailing edge of the previous span and the leading + edge of the current span round to the same super-sampled x value, + I might overflow to 256 with this add, hence the funny subtract (crud). + */ + unsigned tmp = alpha[x] + startAlpha; + SkASSERT(tmp <= 256); + alpha[x] = SkToU8(tmp - (tmp >> 8)); // was (tmp >> 7), but that seems wrong if we're trying to catch 256 + + runs += x + 1; + alpha += x + 1; + x = 0; + SkDEBUGCODE(this->validate();) + } + + if (middleCount) { + SkAlphaRuns::Break(runs, alpha, x, middleCount); + alpha += x; + runs += x; + x = 0; + do { + alpha[0] = SkToU8(CatchOverflow(alpha[0] + maxValue)); + int n = runs[0]; + SkASSERT(n <= middleCount); + alpha += n; + runs += n; + middleCount -= n; + } while (middleCount > 0); + SkDEBUGCODE(this->validate();) + lastAlpha = alpha; + } + + if (stopAlpha) { + SkAlphaRuns::Break(runs, alpha, x, 1); + alpha += x; + alpha[0] = SkToU8(alpha[0] + stopAlpha); + SkDEBUGCODE(this->validate();) + lastAlpha = alpha; + } + + return SkToS32(lastAlpha - fAlpha); // new offsetX + } + + SkDEBUGCODE(void assertValid(int y, int maxStep) const;) + SkDEBUGCODE(void dump() const;) + + /** + * Break the runs in the buffer at offsets x and x+count, properly + * updating the runs to the right and left. + * i.e. from the state AAAABBBB, run-length encoded as A4B4, + * Break(..., 2, 5) would produce AAAABBBB rle as A2A2B3B1. + * Allows add() to sum another run to some of the new sub-runs. + * i.e. adding ..CCCCC. would produce AADDEEEB, rle as A2D2E3B1. + */ + static void Break(int16_t runs[], uint8_t alpha[], int x, int count) { + SkASSERT(count > 0 && x >= 0); + + // SkAlphaRuns::BreakAt(runs, alpha, x); + // SkAlphaRuns::BreakAt(&runs[x], &alpha[x], count); + + int16_t* next_runs = runs + x; + uint8_t* next_alpha = alpha + x; + + while (x > 0) { + int n = runs[0]; + SkASSERT(n > 0); + + if (x < n) { + alpha[x] = alpha[0]; + runs[0] = SkToS16(x); + runs[x] = SkToS16(n - x); + break; + } + runs += n; + alpha += n; + x -= n; + } + + runs = next_runs; + alpha = next_alpha; + x = count; + + for (;;) { + int n = runs[0]; + SkASSERT(n > 0); + + if (x < n) { + alpha[x] = alpha[0]; + runs[0] = SkToS16(x); + runs[x] = SkToS16(n - x); + break; + } + x -= n; + if (x <= 0) { + break; + } + runs += n; + alpha += n; + } + } + + /** + * Cut (at offset x in the buffer) a run into two shorter runs with + * matching alpha values. + * Used by the RectClipBlitter to trim a RLE encoding to match the + * clipping rectangle. + */ + static void BreakAt(int16_t runs[], uint8_t alpha[], int x) { + while (x > 0) { + int n = runs[0]; + SkASSERT(n > 0); + + if (x < n) { + alpha[x] = alpha[0]; + runs[0] = SkToS16(x); + runs[x] = SkToS16(n - x); + break; + } + runs += n; + alpha += n; + x -= n; + } + } + +private: + SkDEBUGCODE(int fWidth;) + SkDEBUGCODE(void validate() const;) +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkAutoBlitterChoose.h b/gfx/skia/skia/src/core/SkAutoBlitterChoose.h new file mode 100644 index 0000000000..34f4272e35 --- /dev/null +++ b/gfx/skia/skia/src/core/SkAutoBlitterChoose.h @@ -0,0 +1,57 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAutoBlitterChoose_DEFINED +#define SkAutoBlitterChoose_DEFINED + +#include "include/private/base/SkMacros.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkDrawBase.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkSurfacePriv.h" + +class SkMatrix; +class SkPaint; +class SkPixmap; + +class SkAutoBlitterChoose : SkNoncopyable { +public: + SkAutoBlitterChoose() {} + SkAutoBlitterChoose(const SkDrawBase& draw, const SkMatrixProvider* matrixProvider, + const SkPaint& paint, bool drawCoverage = false) { + this->choose(draw, matrixProvider, paint, drawCoverage); + } + + SkBlitter* operator->() { return fBlitter; } + SkBlitter* get() const { return fBlitter; } + + SkBlitter* choose(const SkDrawBase& draw, const SkMatrixProvider* matrixProvider, + const SkPaint& paint, bool drawCoverage = false) { + SkASSERT(!fBlitter); + if (!matrixProvider) { + matrixProvider = draw.fMatrixProvider; + } + fBlitter = draw.fBlitterChooser(draw.fDst, + matrixProvider->localToDevice(), + paint, + &fAlloc, + drawCoverage, + draw.fRC->clipShader(), + SkSurfacePropsCopyOrDefault(draw.fProps)); + return fBlitter; + } + +private: + // Owned by fAlloc, which will handle the delete. + SkBlitter* fBlitter = nullptr; + + SkSTArenaAlloc fAlloc; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkAutoPixmapStorage.cpp b/gfx/skia/skia/src/core/SkAutoPixmapStorage.cpp new file mode 100644 index 0000000000..9b7a886d8b --- /dev/null +++ b/gfx/skia/skia/src/core/SkAutoPixmapStorage.cpp @@ -0,0 +1,82 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkData.h" +#include "src/core/SkAutoPixmapStorage.h" + +SkAutoPixmapStorage::SkAutoPixmapStorage() : fStorage(nullptr) {} + +SkAutoPixmapStorage::~SkAutoPixmapStorage() { + this->freeStorage(); +} + +SkAutoPixmapStorage::SkAutoPixmapStorage(SkAutoPixmapStorage&& other) : fStorage(nullptr) { + *this = std::move(other); +} + +SkAutoPixmapStorage& SkAutoPixmapStorage::operator=(SkAutoPixmapStorage&& other) { + this->fStorage = other.fStorage; + this->INHERITED::reset(other.info(), this->fStorage, other.rowBytes()); + + other.fStorage = nullptr; + other.INHERITED::reset(); + + return *this; +} + +size_t SkAutoPixmapStorage::AllocSize(const SkImageInfo& info, size_t* rowBytes) { + size_t rb = info.minRowBytes(); + if (rowBytes) { + *rowBytes = rb; + } + return info.computeByteSize(rb); +} + +bool SkAutoPixmapStorage::tryAlloc(const SkImageInfo& info) { + this->freeStorage(); + + size_t rb; + size_t size = AllocSize(info, &rb); + if (SkImageInfo::ByteSizeOverflowed(size)) { + return false; + } + void* pixels = sk_malloc_canfail(size); + if (nullptr == pixels) { + return false; + } + this->reset(info, pixels, rb); + fStorage = pixels; + return true; +} + +void SkAutoPixmapStorage::alloc(const SkImageInfo& info) { + SkASSERT_RELEASE(this->tryAlloc(info)); +} + +void* SkAutoPixmapStorage::detachPixels() { + if (!fStorage) { + return nullptr; + } + + void* data = fStorage; + fStorage = nullptr; + this->INHERITED::reset(); + + return data; +} + +sk_sp SkAutoPixmapStorage::detachPixelsAsData() { + if (!fStorage) { + return nullptr; + } + + sk_sp data = SkData::MakeFromMalloc(fStorage, this->computeByteSize()); + fStorage = nullptr; + this->INHERITED::reset(); + + return data; +} diff --git a/gfx/skia/skia/src/core/SkAutoPixmapStorage.h b/gfx/skia/skia/src/core/SkAutoPixmapStorage.h new file mode 100644 index 0000000000..5d651f141c --- /dev/null +++ b/gfx/skia/skia/src/core/SkAutoPixmapStorage.h @@ -0,0 +1,92 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkAutoPixmapStorage_DEFINED +#define SkAutoPixmapStorage_DEFINED + +#include "include/core/SkPixmap.h" +#include "include/private/base/SkMalloc.h" + +class SkData; + +class SkAutoPixmapStorage : public SkPixmap { +public: + SkAutoPixmapStorage(); + ~SkAutoPixmapStorage(); + + SkAutoPixmapStorage(SkAutoPixmapStorage&& other); + + /** + * Leave the moved-from object in a free-but-valid state. + */ + SkAutoPixmapStorage& operator=(SkAutoPixmapStorage&& other); + + /** + * Try to allocate memory for the pixels needed to match the specified Info. On success + * return true and fill out the pixmap to point to that memory. The storage will be freed + * when this object is destroyed, or if another call to tryAlloc() or alloc() is made. + * + * On failure, return false and reset() the pixmap to empty. + */ + bool tryAlloc(const SkImageInfo&); + + /** + * Allocate memory for the pixels needed to match the specified Info and fill out the pixmap + * to point to that memory. The storage will be freed when this object is destroyed, + * or if another call to tryAlloc() or alloc() is made. + * + * If the memory cannot be allocated, calls SK_ABORT(). + */ + void alloc(const SkImageInfo&); + + /** + * Gets the size and optionally the rowBytes that would be allocated by SkAutoPixmapStorage if + * alloc/tryAlloc was called. + */ + static size_t AllocSize(const SkImageInfo& info, size_t* rowBytes); + + /** + * Returns a void* of the allocated pixel memory and resets the pixmap. If the storage hasn't + * been allocated, the result is NULL. The caller is responsible for calling sk_free to free + * the returned memory. + */ + void* SK_WARN_UNUSED_RESULT detachPixels(); + + /** + * Returns an SkData object wrapping the allocated pixels memory, and resets the pixmap. + * If the storage hasn't been allocated, the result is NULL. + */ + sk_sp SK_WARN_UNUSED_RESULT detachPixelsAsData(); + + // We wrap these so we can clear our internal storage + + void reset() { + this->freeStorage(); + this->INHERITED::reset(); + } + void reset(const SkImageInfo& info, const void* addr, size_t rb) { + this->freeStorage(); + this->INHERITED::reset(info, addr, rb); + } + + bool SK_WARN_UNUSED_RESULT reset(const SkMask& mask) { + this->freeStorage(); + return this->INHERITED::reset(mask); + } + +private: + void* fStorage; + + void freeStorage() { + sk_free(fStorage); + fStorage = nullptr; + } + + using INHERITED = SkPixmap; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkBBHFactory.cpp b/gfx/skia/skia/src/core/SkBBHFactory.cpp new file mode 100644 index 0000000000..18853a0052 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBBHFactory.cpp @@ -0,0 +1,18 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBBHFactory.h" +#include "src/core/SkRTree.h" + +sk_sp SkRTreeFactory::operator()() const { + return sk_make_sp(); +} + +void SkBBoxHierarchy::insert(const SkRect rects[], const Metadata[], int N) { + // Ignore Metadata. + this->insert(rects, N); +} diff --git a/gfx/skia/skia/src/core/SkBigPicture.cpp b/gfx/skia/skia/src/core/SkBigPicture.cpp new file mode 100644 index 0000000000..887b9df034 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBigPicture.cpp @@ -0,0 +1,91 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBBHFactory.h" +#include "src/core/SkBigPicture.h" +#include "src/core/SkRecord.h" +#include "src/core/SkRecordDraw.h" +#include "src/core/SkTraceEvent.h" + +SkBigPicture::SkBigPicture(const SkRect& cull, + sk_sp record, + std::unique_ptr drawablePicts, + sk_sp bbh, + size_t approxBytesUsedBySubPictures) + : fCullRect(cull) + , fApproxBytesUsedBySubPictures(approxBytesUsedBySubPictures) + , fRecord(std::move(record)) + , fDrawablePicts(std::move(drawablePicts)) + , fBBH(std::move(bbh)) +{} + +void SkBigPicture::playback(SkCanvas* canvas, AbortCallback* callback) const { + SkASSERT(canvas); + + // If the query contains the whole picture, don't bother with the BBH. + const bool useBBH = !canvas->getLocalClipBounds().contains(this->cullRect()); + + SkRecordDraw(*fRecord, + canvas, + this->drawablePicts(), + nullptr, + this->drawableCount(), + useBBH ? fBBH.get() : nullptr, + callback); +} + +void SkBigPicture::partialPlayback(SkCanvas* canvas, + int start, + int stop, + const SkM44& initialCTM) const { + SkASSERT(canvas); + SkRecordPartialDraw(*fRecord, + canvas, + this->drawablePicts(), + this->drawableCount(), + start, + stop, + initialCTM); +} + +struct NestedApproxOpCounter { + int fCount = 0; + + template void operator()(const T& op) { + fCount += 1; + } + void operator()(const SkRecords::DrawPicture& op) { + fCount += op.picture->approximateOpCount(true); + } +}; + +SkRect SkBigPicture::cullRect() const { return fCullRect; } +int SkBigPicture::approximateOpCount(bool nested) const { + if (nested) { + NestedApproxOpCounter visitor; + for (int i = 0; i < fRecord->count(); i++) { + fRecord->visit(i, visitor); + } + return visitor.fCount; + } else { + return fRecord->count(); + } +} +size_t SkBigPicture::approximateBytesUsed() const { + size_t bytes = sizeof(*this) + fRecord->bytesUsed() + fApproxBytesUsedBySubPictures; + if (fBBH) { bytes += fBBH->bytesUsed(); } + return bytes; +} + +int SkBigPicture::drawableCount() const { + return fDrawablePicts ? fDrawablePicts->count() : 0; +} + +SkPicture const* const* SkBigPicture::drawablePicts() const { + return fDrawablePicts ? fDrawablePicts->begin() : nullptr; +} + diff --git a/gfx/skia/skia/src/core/SkBigPicture.h b/gfx/skia/skia/src/core/SkBigPicture.h new file mode 100644 index 0000000000..09ae1e244f --- /dev/null +++ b/gfx/skia/skia/src/core/SkBigPicture.h @@ -0,0 +1,74 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBigPicture_DEFINED +#define SkBigPicture_DEFINED + +#include "include/core/SkM44.h" +#include "include/core/SkPicture.h" +#include "include/core/SkRect.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTemplates.h" + +class SkBBoxHierarchy; +class SkMatrix; +class SkRecord; + +// An implementation of SkPicture supporting an arbitrary number of drawing commands. +// This is called "big" because there used to be a "mini" that only supported a subset of the +// calls as an optimization. +class SkBigPicture final : public SkPicture { +public: + // An array of refcounted const SkPicture pointers. + class SnapshotArray : ::SkNoncopyable { + public: + SnapshotArray(const SkPicture* pics[], int count) : fPics(pics), fCount(count) {} + ~SnapshotArray() { for (int i = 0; i < fCount; i++) { fPics[i]->unref(); } } + + const SkPicture* const* begin() const { return fPics; } + int count() const { return fCount; } + private: + skia_private::AutoTMalloc fPics; + int fCount; + }; + + SkBigPicture(const SkRect& cull, + sk_sp, + std::unique_ptr, + sk_sp, + size_t approxBytesUsedBySubPictures); + + +// SkPicture overrides + void playback(SkCanvas*, AbortCallback*) const override; + SkRect cullRect() const override; + int approximateOpCount(bool nested) const override; + size_t approximateBytesUsed() const override; + const SkBigPicture* asSkBigPicture() const override { return this; } + +// Used by GrLayerHoister + void partialPlayback(SkCanvas*, + int start, + int stop, + const SkM44& initialCTM) const; +// Used by GrRecordReplaceDraw + const SkBBoxHierarchy* bbh() const { return fBBH.get(); } + const SkRecord* record() const { return fRecord.get(); } + +private: + int drawableCount() const; + SkPicture const* const* drawablePicts() const; + + const SkRect fCullRect; + const size_t fApproxBytesUsedBySubPictures; + sk_sp fRecord; + std::unique_ptr fDrawablePicts; + sk_sp fBBH; +}; + +#endif//SkBigPicture_DEFINED diff --git a/gfx/skia/skia/src/core/SkBitmap.cpp b/gfx/skia/skia/src/core/SkBitmap.cpp new file mode 100644 index 0000000000..c89b53001c --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmap.cpp @@ -0,0 +1,671 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" + +#include "include/core/SkColorSpace.h" // IWYU pragma: keep +#include "include/core/SkColorType.h" +#include "include/core/SkImage.h" +#include "include/core/SkMallocPixelRef.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixelRef.h" +#include "include/core/SkRect.h" +#include "include/core/SkShader.h" +#include "include/core/SkTileMode.h" +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkConvertPixels.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkPixelRefPriv.h" +#include "src/core/SkWritePixelsRec.h" +#include "src/shaders/SkImageShader.h" + +#include +#include +class SkMaskFilter; + +static bool reset_return_false(SkBitmap* bm) { + bm->reset(); + return false; +} + +SkBitmap::SkBitmap() {} + +SkBitmap::SkBitmap(const SkBitmap& src) + : fPixelRef (src.fPixelRef) + , fPixmap (src.fPixmap) + , fMips (src.fMips) +{ + SkDEBUGCODE(src.validate();) + SkDEBUGCODE(this->validate();) +} + +SkBitmap::SkBitmap(SkBitmap&& other) + : fPixelRef (std::move(other.fPixelRef)) + , fPixmap (std::move(other.fPixmap)) + , fMips (std::move(other.fMips)) +{ + SkASSERT(!other.fPixelRef); + other.fPixmap.reset(); +} + +SkBitmap::~SkBitmap() {} + +SkBitmap& SkBitmap::operator=(const SkBitmap& src) { + if (this != &src) { + fPixelRef = src.fPixelRef; + fPixmap = src.fPixmap; + fMips = src.fMips; + } + SkDEBUGCODE(this->validate();) + return *this; +} + +SkBitmap& SkBitmap::operator=(SkBitmap&& other) { + if (this != &other) { + fPixelRef = std::move(other.fPixelRef); + fPixmap = std::move(other.fPixmap); + fMips = std::move(other.fMips); + SkASSERT(!other.fPixelRef); + other.fPixmap.reset(); + } + return *this; +} + +void SkBitmap::swap(SkBitmap& other) { + using std::swap; + swap(*this, other); + SkDEBUGCODE(this->validate();) +} + +void SkBitmap::reset() { + fPixelRef = nullptr; // Free pixels. + fPixmap.reset(); + fMips.reset(); +} + +void SkBitmap::getBounds(SkRect* bounds) const { + SkASSERT(bounds); + *bounds = SkRect::Make(this->dimensions()); +} + +void SkBitmap::getBounds(SkIRect* bounds) const { + SkASSERT(bounds); + *bounds = fPixmap.bounds(); +} + +SkColorSpace* SkBitmap::colorSpace() const { return fPixmap.colorSpace(); } + +sk_sp SkBitmap::refColorSpace() const { return fPixmap.info().refColorSpace(); } + +/////////////////////////////////////////////////////////////////////////////// + +bool SkBitmap::setInfo(const SkImageInfo& info, size_t rowBytes) { + SkAlphaType newAT = info.alphaType(); + if (!SkColorTypeValidateAlphaType(info.colorType(), info.alphaType(), &newAT)) { + return reset_return_false(this); + } + // don't look at info.alphaType(), since newAT is the real value... + + // require that rowBytes fit in 31bits + int64_t mrb = info.minRowBytes64(); + if (!SkTFitsIn(mrb)) { + return reset_return_false(this); + } + if (!SkTFitsIn(rowBytes)) { + return reset_return_false(this); + } + + if (info.width() < 0 || info.height() < 0) { + return reset_return_false(this); + } + + if (kUnknown_SkColorType == info.colorType()) { + rowBytes = 0; + } else if (0 == rowBytes) { + rowBytes = (size_t)mrb; + } else if (!info.validRowBytes(rowBytes)) { + return reset_return_false(this); + } + + fPixelRef = nullptr; // Free pixels. + fPixmap.reset(info.makeAlphaType(newAT), nullptr, SkToU32(rowBytes)); + SkDEBUGCODE(this->validate();) + return true; +} + + + +bool SkBitmap::setAlphaType(SkAlphaType newAlphaType) { + if (!SkColorTypeValidateAlphaType(this->colorType(), newAlphaType, &newAlphaType)) { + return false; + } + if (this->alphaType() != newAlphaType) { + auto newInfo = fPixmap.info().makeAlphaType(newAlphaType); + fPixmap.reset(std::move(newInfo), fPixmap.addr(), fPixmap.rowBytes()); + } + SkDEBUGCODE(this->validate();) + return true; +} + +SkIPoint SkBitmap::pixelRefOrigin() const { + const char* addr = (const char*)fPixmap.addr(); + const char* pix = (const char*)(fPixelRef ? fPixelRef->pixels() : nullptr); + size_t rb = this->rowBytes(); + if (!pix || 0 == rb) { + return {0, 0}; + } + SkASSERT(this->bytesPerPixel() > 0); + SkASSERT(this->bytesPerPixel() == (1 << this->shiftPerPixel())); + SkASSERT(addr >= pix); + size_t off = addr - pix; + return {SkToS32((off % rb) >> this->shiftPerPixel()), SkToS32(off / rb)}; +} + +void SkBitmap::setPixelRef(sk_sp pr, int dx, int dy) { +#ifdef SK_DEBUG + if (pr) { + if (kUnknown_SkColorType != this->colorType()) { + SkASSERT(dx >= 0 && this->width() + dx <= pr->width()); + SkASSERT(dy >= 0 && this->height() + dy <= pr->height()); + } + } +#endif + fPixelRef = kUnknown_SkColorType != this->colorType() ? std::move(pr) : nullptr; + void* p = nullptr; + size_t rowBytes = this->rowBytes(); + // ignore dx,dy if there is no pixelref + if (fPixelRef) { + rowBytes = fPixelRef->rowBytes(); + // TODO(reed): Enforce that PixelRefs must have non-null pixels. + p = fPixelRef->pixels(); + if (p) { + p = (char*)p + dy * rowBytes + dx * this->bytesPerPixel(); + } + } + fPixmap.reset(fPixmap.info(), p, rowBytes); + SkDEBUGCODE(this->validate();) +} + +void SkBitmap::setPixels(void* p) { + if (kUnknown_SkColorType == this->colorType()) { + p = nullptr; + } + size_t rb = this->rowBytes(); + fPixmap.reset(fPixmap.info(), p, rb); + fPixelRef = p ? sk_make_sp(this->width(), this->height(), p, rb) : nullptr; + SkDEBUGCODE(this->validate();) +} + +bool SkBitmap::tryAllocPixels(Allocator* allocator) { + HeapAllocator stdalloc; + + if (nullptr == allocator) { + allocator = &stdalloc; + } + return allocator->allocPixelRef(this); +} + +bool SkBitmap::tryAllocN32Pixels(int width, int height, bool isOpaque) { + SkImageInfo info = SkImageInfo::MakeN32(width, height, + isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType); + return this->tryAllocPixels(info); +} + +void SkBitmap::allocN32Pixels(int width, int height, bool isOpaque) { + SkImageInfo info = SkImageInfo::MakeN32(width, height, + isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType); + this->allocPixels(info); +} + +void SkBitmap::allocPixels() { + this->allocPixels((Allocator*)nullptr); +} + +void SkBitmap::allocPixels(Allocator* allocator) { + if (!this->tryAllocPixels(allocator)) { + const SkImageInfo& info = this->info(); + SK_ABORT("SkBitmap::tryAllocPixels failed " + "ColorType:%d AlphaType:%d [w:%d h:%d] rb:%zu", + info.colorType(), info.alphaType(), info.width(), info.height(), this->rowBytes()); + } +} + +void SkBitmap::allocPixelsFlags(const SkImageInfo& info, uint32_t flags) { + SkASSERT_RELEASE(this->tryAllocPixelsFlags(info, flags)); +} + +void SkBitmap::allocPixels(const SkImageInfo& info, size_t rowBytes) { + SkASSERT_RELEASE(this->tryAllocPixels(info, rowBytes)); +} + +void SkBitmap::allocPixels(const SkImageInfo& info) { + this->allocPixels(info, info.minRowBytes()); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkBitmap::tryAllocPixels(const SkImageInfo& requestedInfo, size_t rowBytes) { + if (!this->setInfo(requestedInfo, rowBytes)) { + return reset_return_false(this); + } + + // setInfo may have corrected info (e.g. 565 is always opaque). + const SkImageInfo& correctedInfo = this->info(); + if (kUnknown_SkColorType == correctedInfo.colorType()) { + return true; + } + // setInfo may have computed a valid rowbytes if 0 were passed in + rowBytes = this->rowBytes(); + + sk_sp pr = SkMallocPixelRef::MakeAllocate(correctedInfo, rowBytes); + if (!pr) { + return reset_return_false(this); + } + this->setPixelRef(std::move(pr), 0, 0); + if (nullptr == this->getPixels()) { + return reset_return_false(this); + } + SkDEBUGCODE(this->validate();) + return true; +} + +bool SkBitmap::tryAllocPixelsFlags(const SkImageInfo& requestedInfo, uint32_t allocFlags) { + if (!this->setInfo(requestedInfo)) { + return reset_return_false(this); + } + + // setInfo may have corrected info (e.g. 565 is always opaque). + const SkImageInfo& correctedInfo = this->info(); + + sk_sp pr = SkMallocPixelRef::MakeAllocate(correctedInfo, + correctedInfo.minRowBytes()); + if (!pr) { + return reset_return_false(this); + } + this->setPixelRef(std::move(pr), 0, 0); + if (nullptr == this->getPixels()) { + return reset_return_false(this); + } + SkDEBUGCODE(this->validate();) + return true; +} + +static void invoke_release_proc(void (*proc)(void* pixels, void* ctx), void* pixels, void* ctx) { + if (proc) { + proc(pixels, ctx); + } +} + +bool SkBitmap::installPixels(const SkImageInfo& requestedInfo, void* pixels, size_t rb, + void (*releaseProc)(void* addr, void* context), void* context) { + if (!this->setInfo(requestedInfo, rb)) { + invoke_release_proc(releaseProc, pixels, context); + this->reset(); + return false; + } + if (nullptr == pixels) { + invoke_release_proc(releaseProc, pixels, context); + return true; // we behaved as if they called setInfo() + } + + // setInfo may have corrected info (e.g. 565 is always opaque). + const SkImageInfo& correctedInfo = this->info(); + this->setPixelRef( + SkMakePixelRefWithProc(correctedInfo.width(), correctedInfo.height(), + rb, pixels, releaseProc, context), 0, 0); + SkDEBUGCODE(this->validate();) + return true; +} + +bool SkBitmap::installPixels(const SkPixmap& pixmap) { + return this->installPixels(pixmap.info(), pixmap.writable_addr(), pixmap.rowBytes(), + nullptr, nullptr); +} + +bool SkBitmap::installMaskPixels(const SkMask& mask) { + if (SkMask::kA8_Format != mask.fFormat) { + this->reset(); + return false; + } + return this->installPixels(SkImageInfo::MakeA8(mask.fBounds.width(), + mask.fBounds.height()), + mask.fImage, mask.fRowBytes); +} + +/////////////////////////////////////////////////////////////////////////////// + +uint32_t SkBitmap::getGenerationID() const { + return fPixelRef ? fPixelRef->getGenerationID() : 0; +} + +void SkBitmap::notifyPixelsChanged() const { + SkASSERT(!this->isImmutable()); + if (fPixelRef) { + fPixelRef->notifyPixelsChanged(); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +/** We explicitly use the same allocator for our pixels that SkMask does, + so that we can freely assign memory allocated by one class to the other. + */ +bool SkBitmap::HeapAllocator::allocPixelRef(SkBitmap* dst) { + const SkImageInfo& info = dst->info(); + if (kUnknown_SkColorType == info.colorType()) { +// SkDebugf("unsupported config for info %d\n", dst->config()); + return false; + } + + sk_sp pr = SkMallocPixelRef::MakeAllocate(info, dst->rowBytes()); + if (!pr) { + return false; + } + + dst->setPixelRef(std::move(pr), 0, 0); + SkDEBUGCODE(dst->validate();) + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkBitmap::isImmutable() const { + return fPixelRef ? fPixelRef->isImmutable() : false; +} + +void SkBitmap::setImmutable() { + if (fPixelRef) { + fPixelRef->setImmutable(); + } +} + +void* SkBitmap::getAddr(int x, int y) const { + SkASSERT((unsigned)x < (unsigned)this->width()); + SkASSERT((unsigned)y < (unsigned)this->height()); + + char* base = (char*)this->getPixels(); + if (base) { + base += (y * this->rowBytes()) + (x << this->shiftPerPixel()); + } + return base; +} + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// + +void SkBitmap::erase(SkColor4f c, SkColorSpace* colorSpace, const SkIRect& area) const { + SkDEBUGCODE(this->validate();) + + if (kUnknown_SkColorType == this->colorType()) { + // TODO: can we ASSERT that we never get here? + return; // can't erase. Should we bzero so the memory is not uninitialized? + } + + SkPixmap result; + if (!this->peekPixels(&result)) { + return; + } + + if (result.erase(c, colorSpace, &area)) { + this->notifyPixelsChanged(); + } +} + +void SkBitmap::erase(SkColor c, const SkIRect& area) const { + this->erase(SkColor4f::FromColor(c), nullptr, area); +} + +void SkBitmap::erase(SkColor4f c, const SkIRect& area) const { + this->erase(c, nullptr, area); +} + +void SkBitmap::eraseColor(SkColor4f c, SkColorSpace* colorSpace) const { + this->erase(c, colorSpace, SkIRect::MakeWH(this->width(), this->height())); +} + +void SkBitmap::eraseColor(SkColor c) const { + this->erase(SkColor4f::FromColor(c), nullptr, SkIRect::MakeWH(this->width(), this->height())); +} + +////////////////////////////////////////////////////////////////////////////////////// +////////////////////////////////////////////////////////////////////////////////////// + +bool SkBitmap::extractSubset(SkBitmap* result, const SkIRect& subset) const { + SkDEBUGCODE(this->validate();) + + if (nullptr == result || !fPixelRef) { + return false; // no src pixels + } + + SkIRect srcRect, r; + srcRect.setWH(this->width(), this->height()); + if (!r.intersect(srcRect, subset)) { + return false; // r is empty (i.e. no intersection) + } + + // If the upper left of the rectangle was outside the bounds of this SkBitmap, we should have + // exited above. + SkASSERT(static_cast(r.fLeft) < static_cast(this->width())); + SkASSERT(static_cast(r.fTop) < static_cast(this->height())); + + SkBitmap dst; + dst.setInfo(this->info().makeDimensions(r.size()), this->rowBytes()); + + if (fPixelRef) { + SkIPoint origin = this->pixelRefOrigin(); + // share the pixelref with a custom offset + dst.setPixelRef(fPixelRef, origin.x() + r.fLeft, origin.y() + r.fTop); + } + SkDEBUGCODE(dst.validate();) + + // we know we're good, so commit to result + result->swap(dst); + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkBitmap::readPixels(const SkImageInfo& requestedDstInfo, void* dstPixels, size_t dstRB, + int x, int y) const { + SkPixmap src; + if (!this->peekPixels(&src)) { + return false; + } + return src.readPixels(requestedDstInfo, dstPixels, dstRB, x, y); +} + +bool SkBitmap::readPixels(const SkPixmap& dst, int srcX, int srcY) const { + return this->readPixels(dst.info(), dst.writable_addr(), dst.rowBytes(), srcX, srcY); +} + +bool SkBitmap::writePixels(const SkPixmap& src, int dstX, int dstY) { + if (!SkImageInfoValidConversion(this->info(), src.info())) { + return false; + } + + SkWritePixelsRec rec(src.info(), src.addr(), src.rowBytes(), dstX, dstY); + if (!rec.trim(this->width(), this->height())) { + return false; + } + + void* dstPixels = this->getAddr(rec.fX, rec.fY); + const SkImageInfo dstInfo = this->info().makeDimensions(rec.fInfo.dimensions()); + if (!SkConvertPixels(dstInfo, dstPixels, this->rowBytes(), + rec.fInfo, rec.fPixels, rec.fRowBytes)) { + return false; + } + this->notifyPixelsChanged(); + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +static bool GetBitmapAlpha(const SkBitmap& src, uint8_t* SK_RESTRICT alpha, int alphaRowBytes) { + SkASSERT(alpha != nullptr); + SkASSERT(alphaRowBytes >= src.width()); + + SkPixmap pmap; + if (!src.peekPixels(&pmap)) { + for (int y = 0; y < src.height(); ++y) { + memset(alpha, 0, src.width()); + alpha += alphaRowBytes; + } + return false; + } + return SkConvertPixels(SkImageInfo::MakeA8(pmap.width(), pmap.height()), alpha, alphaRowBytes, + pmap.info(), pmap.addr(), pmap.rowBytes()); +} + +bool SkBitmap::extractAlpha(SkBitmap* dst, const SkPaint* paint, + Allocator *allocator, SkIPoint* offset) const { + SkDEBUGCODE(this->validate();) + + SkBitmap tmpBitmap; + SkMatrix identity; + SkMask srcM, dstM; + + if (this->width() == 0 || this->height() == 0) { + return false; + } + srcM.fBounds.setWH(this->width(), this->height()); + srcM.fRowBytes = SkAlign4(this->width()); + srcM.fFormat = SkMask::kA8_Format; + + SkMaskFilter* filter = paint ? paint->getMaskFilter() : nullptr; + + // compute our (larger?) dst bounds if we have a filter + if (filter) { + identity.reset(); + if (!as_MFB(filter)->filterMask(&dstM, srcM, identity, nullptr)) { + goto NO_FILTER_CASE; + } + dstM.fRowBytes = SkAlign4(dstM.fBounds.width()); + } else { + NO_FILTER_CASE: + tmpBitmap.setInfo(SkImageInfo::MakeA8(this->width(), this->height()), srcM.fRowBytes); + if (!tmpBitmap.tryAllocPixels(allocator)) { + // Allocation of pixels for alpha bitmap failed. + SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n", + tmpBitmap.width(), tmpBitmap.height()); + return false; + } + GetBitmapAlpha(*this, tmpBitmap.getAddr8(0, 0), srcM.fRowBytes); + if (offset) { + offset->set(0, 0); + } + tmpBitmap.swap(*dst); + return true; + } + srcM.fImage = SkMask::AllocImage(srcM.computeImageSize()); + SkAutoMaskFreeImage srcCleanup(srcM.fImage); + + GetBitmapAlpha(*this, srcM.fImage, srcM.fRowBytes); + if (!as_MFB(filter)->filterMask(&dstM, srcM, identity, nullptr)) { + goto NO_FILTER_CASE; + } + SkAutoMaskFreeImage dstCleanup(dstM.fImage); + + tmpBitmap.setInfo(SkImageInfo::MakeA8(dstM.fBounds.width(), dstM.fBounds.height()), + dstM.fRowBytes); + if (!tmpBitmap.tryAllocPixels(allocator)) { + // Allocation of pixels for alpha bitmap failed. + SkDebugf("extractAlpha failed to allocate (%d,%d) alpha bitmap\n", + tmpBitmap.width(), tmpBitmap.height()); + return false; + } + memcpy(tmpBitmap.getPixels(), dstM.fImage, dstM.computeImageSize()); + if (offset) { + offset->set(dstM.fBounds.fLeft, dstM.fBounds.fTop); + } + SkDEBUGCODE(tmpBitmap.validate();) + + tmpBitmap.swap(*dst); + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG +void SkBitmap::validate() const { + this->info().validate(); + + SkASSERT(this->info().validRowBytes(this->rowBytes())); + + if (fPixelRef && fPixelRef->pixels()) { + SkASSERT(this->getPixels()); + } else { + SkASSERT(!this->getPixels()); + } + + if (this->getPixels()) { + SkASSERT(fPixelRef); + SkASSERT(fPixelRef->rowBytes() == this->rowBytes()); + SkIPoint origin = this->pixelRefOrigin(); + SkASSERT(origin.fX >= 0); + SkASSERT(origin.fY >= 0); + SkASSERT(fPixelRef->width() >= (int)this->width() + origin.fX); + SkASSERT(fPixelRef->height() >= (int)this->height() + origin.fY); + SkASSERT(fPixelRef->rowBytes() >= this->info().minRowBytes()); + } +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +bool SkBitmap::peekPixels(SkPixmap* pmap) const { + if (this->getPixels()) { + if (pmap) { + *pmap = fPixmap; + } + return true; + } + return false; +} + +sk_sp SkBitmap::asImage() const { + return SkImage::MakeFromBitmap(*this); +} + +sk_sp SkBitmap::makeShader(const SkSamplingOptions& sampling, + const SkMatrix& lm) const { + return this->makeShader(SkTileMode::kClamp, SkTileMode::kClamp, + sampling, &lm); +} + +sk_sp SkBitmap::makeShader(const SkSamplingOptions& sampling, + const SkMatrix* lm) const { + return this->makeShader(SkTileMode::kClamp, SkTileMode::kClamp, + sampling, lm); +} + +sk_sp SkBitmap::makeShader(SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + const SkMatrix& lm) const { + if (!lm.invert(nullptr)) { + return nullptr; + } + return SkImageShader::Make(SkMakeImageFromRasterBitmap(*this, kIfMutable_SkCopyPixelsMode), + tmx, tmy, sampling, &lm); +} + +sk_sp SkBitmap::makeShader(SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + const SkMatrix* lm) const { + if (lm && !lm->invert(nullptr)) { + return nullptr; + } + return SkImageShader::Make(SkMakeImageFromRasterBitmap(*this, kIfMutable_SkCopyPixelsMode), + tmx, tmy, sampling, lm); +} diff --git a/gfx/skia/skia/src/core/SkBitmapCache.cpp b/gfx/skia/skia/src/core/SkBitmapCache.cpp new file mode 100644 index 0000000000..5b53273d65 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmapCache.cpp @@ -0,0 +1,300 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImage.h" +#include "include/core/SkPixelRef.h" +#include "include/core/SkRect.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkResourceCache.h" +#include "src/image/SkImage_Base.h" + +/** + * Use this for bitmapcache and mipmapcache entries. + */ +uint64_t SkMakeResourceCacheSharedIDForBitmap(uint32_t bitmapGenID) { + uint64_t sharedID = SkSetFourByteTag('b', 'm', 'a', 'p'); + return (sharedID << 32) | bitmapGenID; +} + +void SkNotifyBitmapGenIDIsStale(uint32_t bitmapGenID) { + SkResourceCache::PostPurgeSharedID(SkMakeResourceCacheSharedIDForBitmap(bitmapGenID)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkBitmapCacheDesc SkBitmapCacheDesc::Make(uint32_t imageID, const SkIRect& subset) { + SkASSERT(imageID); + SkASSERT(subset.width() > 0 && subset.height() > 0); + return { imageID, subset }; +} + +SkBitmapCacheDesc SkBitmapCacheDesc::Make(const SkImage* image) { + SkIRect bounds = SkIRect::MakeWH(image->width(), image->height()); + return Make(image->uniqueID(), bounds); +} + +namespace { +static unsigned gBitmapKeyNamespaceLabel; + +struct BitmapKey : public SkResourceCache::Key { +public: + BitmapKey(const SkBitmapCacheDesc& desc) : fDesc(desc) { + this->init(&gBitmapKeyNamespaceLabel, SkMakeResourceCacheSharedIDForBitmap(fDesc.fImageID), + sizeof(fDesc)); + } + + const SkBitmapCacheDesc fDesc; +}; +} // namespace + +////////////////////// +#include "include/private/chromium/SkDiscardableMemory.h" +#include "src/core/SkNextID.h" + +void SkBitmapCache_setImmutableWithID(SkPixelRef* pr, uint32_t id) { + pr->setImmutableWithID(id); +} + +class SkBitmapCache::Rec : public SkResourceCache::Rec { +public: + Rec(const SkBitmapCacheDesc& desc, const SkImageInfo& info, size_t rowBytes, + std::unique_ptr dm, void* block) + : fKey(desc) + , fDM(std::move(dm)) + , fMalloc(block) + , fInfo(info) + , fRowBytes(rowBytes) + { + SkASSERT(!(fDM && fMalloc)); // can't have both + + // We need an ID to return with the bitmap/pixelref. We can't necessarily use the key/desc + // ID - lazy images cache the same ID with multiple keys (in different color types). + fPrUniqueID = SkNextID::ImageID(); + } + + ~Rec() override { + SkASSERT(0 == fExternalCounter); + if (fDM && fDiscardableIsLocked) { + SkASSERT(fDM->data()); + fDM->unlock(); + } + sk_free(fMalloc); // may be null + } + + const Key& getKey() const override { return fKey; } + size_t bytesUsed() const override { + return sizeof(fKey) + fInfo.computeByteSize(fRowBytes); + } + bool canBePurged() override { + SkAutoMutexExclusive ama(fMutex); + return fExternalCounter == 0; + } + void postAddInstall(void* payload) override { + SkAssertResult(this->install(static_cast(payload))); + } + + const char* getCategory() const override { return "bitmap"; } + SkDiscardableMemory* diagnostic_only_getDiscardable() const override { + return fDM.get(); + } + + static void ReleaseProc(void* addr, void* ctx) { + Rec* rec = static_cast(ctx); + SkAutoMutexExclusive ama(rec->fMutex); + + SkASSERT(rec->fExternalCounter > 0); + rec->fExternalCounter -= 1; + if (rec->fDM) { + SkASSERT(rec->fMalloc == nullptr); + if (rec->fExternalCounter == 0) { + rec->fDM->unlock(); + rec->fDiscardableIsLocked = false; + } + } else { + SkASSERT(rec->fMalloc != nullptr); + } + } + + bool install(SkBitmap* bitmap) { + SkAutoMutexExclusive ama(fMutex); + + if (!fDM && !fMalloc) { + return false; + } + + if (fDM) { + if (!fDiscardableIsLocked) { + SkASSERT(fExternalCounter == 0); + if (!fDM->lock()) { + fDM.reset(nullptr); + return false; + } + fDiscardableIsLocked = true; + } + SkASSERT(fDM->data()); + } + + bitmap->installPixels(fInfo, fDM ? fDM->data() : fMalloc, fRowBytes, ReleaseProc, this); + SkBitmapCache_setImmutableWithID(bitmap->pixelRef(), fPrUniqueID); + fExternalCounter++; + + return true; + } + + static bool Finder(const SkResourceCache::Rec& baseRec, void* contextBitmap) { + Rec* rec = (Rec*)&baseRec; + SkBitmap* result = (SkBitmap*)contextBitmap; + return rec->install(result); + } + +private: + BitmapKey fKey; + + SkMutex fMutex; + + // either fDM or fMalloc can be non-null, but not both + std::unique_ptr fDM; + void* fMalloc; + + SkImageInfo fInfo; + size_t fRowBytes; + uint32_t fPrUniqueID; + + // This field counts the number of external pixelrefs we have created. + // They notify us when they are destroyed so we can decrement this. + int fExternalCounter = 0; + bool fDiscardableIsLocked = true; +}; + +void SkBitmapCache::PrivateDeleteRec(Rec* rec) { delete rec; } + +SkBitmapCache::RecPtr SkBitmapCache::Alloc(const SkBitmapCacheDesc& desc, const SkImageInfo& info, + SkPixmap* pmap) { + // Ensure that the info matches the subset (i.e. the subset is the entire image) + SkASSERT(info.width() == desc.fSubset.width()); + SkASSERT(info.height() == desc.fSubset.height()); + + const size_t rb = info.minRowBytes(); + size_t size = info.computeByteSize(rb); + if (SkImageInfo::ByteSizeOverflowed(size)) { + return nullptr; + } + + std::unique_ptr dm; + void* block = nullptr; + + auto factory = SkResourceCache::GetDiscardableFactory(); + if (factory) { + dm.reset(factory(size)); + } else { + block = sk_malloc_canfail(size); + } + if (!dm && !block) { + return nullptr; + } + *pmap = SkPixmap(info, dm ? dm->data() : block, rb); + return RecPtr(new Rec(desc, info, rb, std::move(dm), block)); +} + +void SkBitmapCache::Add(RecPtr rec, SkBitmap* bitmap) { + SkResourceCache::Add(rec.release(), bitmap); +} + +bool SkBitmapCache::Find(const SkBitmapCacheDesc& desc, SkBitmap* result) { + desc.validate(); + return SkResourceCache::Find(BitmapKey(desc), SkBitmapCache::Rec::Finder, result); +} + +////////////////////////////////////////////////////////////////////////////////////////// +////////////////////////////////////////////////////////////////////////////////////////// + +#define CHECK_LOCAL(localCache, localName, globalName, ...) \ + ((localCache) ? localCache->localName(__VA_ARGS__) : SkResourceCache::globalName(__VA_ARGS__)) + +namespace { +static unsigned gMipMapKeyNamespaceLabel; + +struct MipMapKey : public SkResourceCache::Key { +public: + MipMapKey(const SkBitmapCacheDesc& desc) : fDesc(desc) { + this->init(&gMipMapKeyNamespaceLabel, SkMakeResourceCacheSharedIDForBitmap(fDesc.fImageID), + sizeof(fDesc)); + } + + const SkBitmapCacheDesc fDesc; +}; + +struct MipMapRec : public SkResourceCache::Rec { + MipMapRec(const SkBitmapCacheDesc& desc, const SkMipmap* result) + : fKey(desc) + , fMipMap(result) + { + fMipMap->attachToCacheAndRef(); + } + + ~MipMapRec() override { + fMipMap->detachFromCacheAndUnref(); + } + + const Key& getKey() const override { return fKey; } + size_t bytesUsed() const override { return sizeof(fKey) + fMipMap->size(); } + const char* getCategory() const override { return "mipmap"; } + SkDiscardableMemory* diagnostic_only_getDiscardable() const override { + return fMipMap->diagnostic_only_getDiscardable(); + } + + static bool Finder(const SkResourceCache::Rec& baseRec, void* contextMip) { + const MipMapRec& rec = static_cast(baseRec); + const SkMipmap* mm = SkRef(rec.fMipMap); + // the call to ref() above triggers a "lock" in the case of discardable memory, + // which means we can now check for null (in case the lock failed). + if (nullptr == mm->data()) { + mm->unref(); // balance our call to ref() + return false; + } + // the call must call unref() when they are done. + *(const SkMipmap**)contextMip = mm; + return true; + } + +private: + MipMapKey fKey; + const SkMipmap* fMipMap; +}; +} // namespace + +const SkMipmap* SkMipmapCache::FindAndRef(const SkBitmapCacheDesc& desc, + SkResourceCache* localCache) { + MipMapKey key(desc); + const SkMipmap* result; + + if (!CHECK_LOCAL(localCache, find, Find, key, MipMapRec::Finder, &result)) { + result = nullptr; + } + return result; +} + +static SkResourceCache::DiscardableFactory get_fact(SkResourceCache* localCache) { + return localCache ? localCache->discardableFactory() + : SkResourceCache::GetDiscardableFactory(); +} + +const SkMipmap* SkMipmapCache::AddAndRef(const SkImage_Base* image, SkResourceCache* localCache) { + SkBitmap src; + if (!image->getROPixels(nullptr, &src)) { + return nullptr; + } + + SkMipmap* mipmap = SkMipmap::Build(src, get_fact(localCache)); + if (mipmap) { + MipMapRec* rec = new MipMapRec(SkBitmapCacheDesc::Make(image), mipmap); + CHECK_LOCAL(localCache, add, Add, rec); + image->notifyAddedToRasterCache(); + } + return mipmap; +} diff --git a/gfx/skia/skia/src/core/SkBitmapCache.h b/gfx/skia/skia/src/core/SkBitmapCache.h new file mode 100644 index 0000000000..18ebcb2bd5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmapCache.h @@ -0,0 +1,67 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBitmapCache_DEFINED +#define SkBitmapCache_DEFINED + +#include "include/core/SkRect.h" +#include + +class SkBitmap; +class SkImage; +class SkImage_Base; +struct SkImageInfo; +class SkMipmap; +class SkPixmap; +class SkResourceCache; + +uint64_t SkMakeResourceCacheSharedIDForBitmap(uint32_t bitmapGenID); + +void SkNotifyBitmapGenIDIsStale(uint32_t bitmapGenID); + +struct SkBitmapCacheDesc { + uint32_t fImageID; // != 0 + SkIRect fSubset; // always set to a valid rect (entire or subset) + + void validate() const { + SkASSERT(fImageID); + SkASSERT(fSubset.fLeft >= 0 && fSubset.fTop >= 0); + SkASSERT(fSubset.width() > 0 && fSubset.height() > 0); + } + + static SkBitmapCacheDesc Make(const SkImage*); + static SkBitmapCacheDesc Make(uint32_t genID, const SkIRect& subset); +}; + +class SkBitmapCache { +public: + /** + * Search based on the desc. If found, returns true and + * result will be set to the matching bitmap with its pixels already locked. + */ + static bool Find(const SkBitmapCacheDesc&, SkBitmap* result); + + class Rec; + struct RecDeleter { void operator()(Rec* r) { PrivateDeleteRec(r); } }; + typedef std::unique_ptr RecPtr; + + static RecPtr Alloc(const SkBitmapCacheDesc&, const SkImageInfo&, SkPixmap*); + static void Add(RecPtr, SkBitmap*); + +private: + static void PrivateDeleteRec(Rec*); +}; + +class SkMipmapCache { +public: + static const SkMipmap* FindAndRef(const SkBitmapCacheDesc&, + SkResourceCache* localCache = nullptr); + static const SkMipmap* AddAndRef(const SkImage_Base*, + SkResourceCache* localCache = nullptr); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkBitmapDevice.cpp b/gfx/skia/skia/src/core/SkBitmapDevice.cpp new file mode 100644 index 0000000000..f00b7f6072 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmapDevice.cpp @@ -0,0 +1,705 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkBitmapDevice.h" + +#include "include/core/SkBlender.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRasterHandleAllocator.h" +#include "include/core/SkShader.h" +#include "include/core/SkSurface.h" +#include "include/core/SkVertices.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkDraw.h" +#include "src/core/SkImageFilterCache.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkStrikeCache.h" +#include "src/image/SkImage_Base.h" +#include "src/text/GlyphRun.h" + +struct Bounder { + SkRect fBounds; + bool fHasBounds; + + Bounder(const SkRect& r, const SkPaint& paint) { + if ((fHasBounds = paint.canComputeFastBounds())) { + fBounds = paint.computeFastBounds(r, &fBounds); + } + } + + bool hasBounds() const { return fHasBounds; } + const SkRect* bounds() const { return fHasBounds ? &fBounds : nullptr; } + operator const SkRect* () const { return this->bounds(); } +}; + +class SkDrawTiler { + enum { + // 8K is 1 too big, since 8K << supersample == 32768 which is too big for SkFixed + kMaxDim = 8192 - 1 + }; + + SkBitmapDevice* fDevice; + SkPixmap fRootPixmap; + SkIRect fSrcBounds; + + // Used for tiling and non-tiling + SkDraw fDraw; + + // fCurr... are only used if fNeedTiling + SkTLazy fTileMatrixProvider; + SkRasterClip fTileRC; + SkIPoint fOrigin; + + bool fDone, fNeedsTiling; + +public: + static bool NeedsTiling(SkBitmapDevice* dev) { + return dev->width() > kMaxDim || dev->height() > kMaxDim; + } + + SkDrawTiler(SkBitmapDevice* dev, const SkRect* bounds) : fDevice(dev) { + fDone = false; + + // we need fDst to be set, and if we're actually drawing, to dirty the genID + if (!dev->accessPixels(&fRootPixmap)) { + // NoDrawDevice uses us (why?) so we have to catch this case w/ no pixels + fRootPixmap.reset(dev->imageInfo(), nullptr, 0); + } + + // do a quick check, so we don't even have to process "bounds" if there is no need + const SkIRect clipR = dev->fRCStack.rc().getBounds(); + fNeedsTiling = clipR.right() > kMaxDim || clipR.bottom() > kMaxDim; + if (fNeedsTiling) { + if (bounds) { + // Make sure we round first, and then intersect. We can't rely on promoting the + // clipR to floats (and then intersecting with devBounds) since promoting + // int --> float can make the float larger than the int. + // rounding(out) first runs the risk of clamping if the float is larger an intmax + // but our roundOut() is saturating, which is fine for this use case + // + // e.g. the older version of this code did this: + // devBounds = mapRect(bounds); + // if (devBounds.intersect(SkRect::Make(clipR))) { + // fSrcBounds = devBounds.roundOut(); + // The problem being that the promotion of clipR to SkRect was unreliable + // + fSrcBounds = dev->localToDevice().mapRect(*bounds).roundOut(); + if (fSrcBounds.intersect(clipR)) { + // Check again, now that we have computed srcbounds. + fNeedsTiling = fSrcBounds.right() > kMaxDim || fSrcBounds.bottom() > kMaxDim; + } else { + fNeedsTiling = false; + fDone = true; + } + } else { + fSrcBounds = clipR; + } + } + + if (fNeedsTiling) { + // fDraw.fDst and fMatrixProvider are reset each time in setupTileDraw() + fDraw.fRC = &fTileRC; + // we'll step/increase it before using it + fOrigin.set(fSrcBounds.fLeft - kMaxDim, fSrcBounds.fTop); + } else { + // don't reference fSrcBounds, as it may not have been set + fDraw.fDst = fRootPixmap; + fDraw.fMatrixProvider = dev; + fDraw.fRC = &dev->fRCStack.rc(); + fOrigin.set(0, 0); + } + + fDraw.fProps = &fDevice->surfaceProps(); + } + + bool needsTiling() const { return fNeedsTiling; } + + const SkDraw* next() { + if (fDone) { + return nullptr; + } + if (fNeedsTiling) { + do { + this->stepAndSetupTileDraw(); // might set the clip to empty and fDone to true + } while (!fDone && fTileRC.isEmpty()); + // if we exit the loop and we're still empty, we're (past) done + if (fTileRC.isEmpty()) { + SkASSERT(fDone); + return nullptr; + } + SkASSERT(!fTileRC.isEmpty()); + } else { + fDone = true; // only draw untiled once + } + return &fDraw; + } + +private: + void stepAndSetupTileDraw() { + SkASSERT(!fDone); + SkASSERT(fNeedsTiling); + + // We do fRootPixmap.width() - kMaxDim instead of fOrigin.fX + kMaxDim to avoid overflow. + if (fOrigin.fX >= fSrcBounds.fRight - kMaxDim) { // too far + fOrigin.fX = fSrcBounds.fLeft; + fOrigin.fY += kMaxDim; + } else { + fOrigin.fX += kMaxDim; + } + // fDone = next origin will be invalid. + fDone = fOrigin.fX >= fSrcBounds.fRight - kMaxDim && + fOrigin.fY >= fSrcBounds.fBottom - kMaxDim; + + SkIRect bounds = SkIRect::MakeXYWH(fOrigin.x(), fOrigin.y(), kMaxDim, kMaxDim); + SkASSERT(!bounds.isEmpty()); + bool success = fRootPixmap.extractSubset(&fDraw.fDst, bounds); + SkASSERT_RELEASE(success); + // now don't use bounds, since fDst has the clipped dimensions. + + fDraw.fMatrixProvider = fTileMatrixProvider.init(fDevice->asMatrixProvider(), + SkIntToScalar(-fOrigin.x()), + SkIntToScalar(-fOrigin.y())); + fDevice->fRCStack.rc().translate(-fOrigin.x(), -fOrigin.y(), &fTileRC); + fTileRC.op(SkIRect::MakeWH(fDraw.fDst.width(), fDraw.fDst.height()), + SkClipOp::kIntersect); + } +}; + +// Passing a bounds allows the tiler to only visit the dst-tiles that might intersect the +// drawing. If null is passed, the tiler has to visit everywhere. The bounds is expected to be +// in local coordinates, as the tiler itself will transform that into device coordinates. +// +#define LOOP_TILER(code, boundsPtr) \ + SkDrawTiler priv_tiler(this, boundsPtr); \ + while (const SkDraw* priv_draw = priv_tiler.next()) { \ + priv_draw->code; \ + } + +// Helper to create an SkDraw from a device +class SkBitmapDevice::BDDraw : public SkDraw { +public: + BDDraw(SkBitmapDevice* dev) { + // we need fDst to be set, and if we're actually drawing, to dirty the genID + if (!dev->accessPixels(&fDst)) { + // NoDrawDevice uses us (why?) so we have to catch this case w/ no pixels + fDst.reset(dev->imageInfo(), nullptr, 0); + } + fMatrixProvider = dev; + fRC = &dev->fRCStack.rc(); + } +}; + +static bool valid_for_bitmap_device(const SkImageInfo& info, + SkAlphaType* newAlphaType) { + if (info.width() < 0 || info.height() < 0 || kUnknown_SkColorType == info.colorType()) { + return false; + } + + if (newAlphaType) { + *newAlphaType = SkColorTypeIsAlwaysOpaque(info.colorType()) ? kOpaque_SkAlphaType + : info.alphaType(); + } + + return true; +} + +SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap) + : INHERITED(bitmap.info(), SkSurfaceProps()) + , fBitmap(bitmap) + , fRCStack(bitmap.width(), bitmap.height()) + , fGlyphPainter(this->surfaceProps(), bitmap.colorType(), bitmap.colorSpace()) { + SkASSERT(valid_for_bitmap_device(bitmap.info(), nullptr)); +} + +SkBitmapDevice* SkBitmapDevice::Create(const SkImageInfo& info) { + return Create(info, SkSurfaceProps()); +} + +SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap, const SkSurfaceProps& surfaceProps, + SkRasterHandleAllocator::Handle hndl) + : INHERITED(bitmap.info(), surfaceProps) + , fBitmap(bitmap) + , fRasterHandle(hndl) + , fRCStack(bitmap.width(), bitmap.height()) + , fGlyphPainter(this->surfaceProps(), bitmap.colorType(), bitmap.colorSpace()) { + SkASSERT(valid_for_bitmap_device(bitmap.info(), nullptr)); +} + +SkBitmapDevice* SkBitmapDevice::Create(const SkImageInfo& origInfo, + const SkSurfaceProps& surfaceProps, + SkRasterHandleAllocator* allocator) { + SkAlphaType newAT = origInfo.alphaType(); + if (!valid_for_bitmap_device(origInfo, &newAT)) { + return nullptr; + } + + SkRasterHandleAllocator::Handle hndl = nullptr; + const SkImageInfo info = origInfo.makeAlphaType(newAT); + SkBitmap bitmap; + + if (kUnknown_SkColorType == info.colorType()) { + if (!bitmap.setInfo(info)) { + return nullptr; + } + } else if (allocator) { + hndl = allocator->allocBitmap(info, &bitmap); + if (!hndl) { + return nullptr; + } + } else if (info.isOpaque()) { + // If this bitmap is opaque, we don't have any sensible default color, + // so we just return uninitialized pixels. + if (!bitmap.tryAllocPixels(info)) { + return nullptr; + } + } else { + // This bitmap has transparency, so we'll zero the pixels (to transparent). + // We use the flag as a faster alloc-then-eraseColor(SK_ColorTRANSPARENT). + if (!bitmap.tryAllocPixelsFlags(info, SkBitmap::kZeroPixels_AllocFlag)) { + return nullptr; + } + } + + return new SkBitmapDevice(bitmap, surfaceProps, hndl); +} + +void SkBitmapDevice::replaceBitmapBackendForRasterSurface(const SkBitmap& bm) { + SkASSERT(bm.width() == fBitmap.width()); + SkASSERT(bm.height() == fBitmap.height()); + fBitmap = bm; // intent is to use bm's pixelRef (and rowbytes/config) + this->privateResize(fBitmap.info().width(), fBitmap.info().height()); +} + +SkBaseDevice* SkBitmapDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint* layerPaint) { + const SkSurfaceProps surfaceProps(this->surfaceProps().flags(), cinfo.fPixelGeometry); + + // Need to force L32 for now if we have an image filter. + // If filters ever support other colortypes, e.g. F16, we can modify this check. + SkImageInfo info = cinfo.fInfo; + if (layerPaint && layerPaint->getImageFilter()) { + // TODO: can we query the imagefilter, to see if it can handle floats (so we don't always + // use N32 when the layer itself was float)? + info = info.makeColorType(kN32_SkColorType); + } + + return SkBitmapDevice::Create(info, surfaceProps, cinfo.fAllocator); +} + +bool SkBitmapDevice::onAccessPixels(SkPixmap* pmap) { + if (this->onPeekPixels(pmap)) { + fBitmap.notifyPixelsChanged(); + return true; + } + return false; +} + +bool SkBitmapDevice::onPeekPixels(SkPixmap* pmap) { + const SkImageInfo info = fBitmap.info(); + if (fBitmap.getPixels() && (kUnknown_SkColorType != info.colorType())) { + pmap->reset(fBitmap.info(), fBitmap.getPixels(), fBitmap.rowBytes()); + return true; + } + return false; +} + +bool SkBitmapDevice::onWritePixels(const SkPixmap& pm, int x, int y) { + // since we don't stop creating un-pixeled devices yet, check for no pixels here + if (nullptr == fBitmap.getPixels()) { + return false; + } + + if (fBitmap.writePixels(pm, x, y)) { + fBitmap.notifyPixelsChanged(); + return true; + } + return false; +} + +bool SkBitmapDevice::onReadPixels(const SkPixmap& pm, int x, int y) { + return fBitmap.readPixels(pm, x, y); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkBitmapDevice::drawPaint(const SkPaint& paint) { + BDDraw(this).drawPaint(paint); +} + +void SkBitmapDevice::drawPoints(SkCanvas::PointMode mode, size_t count, + const SkPoint pts[], const SkPaint& paint) { + LOOP_TILER( drawPoints(mode, count, pts, paint, nullptr), nullptr) +} + +void SkBitmapDevice::drawRect(const SkRect& r, const SkPaint& paint) { + LOOP_TILER( drawRect(r, paint), Bounder(r, paint)) +} + +void SkBitmapDevice::drawOval(const SkRect& oval, const SkPaint& paint) { + // call the VIRTUAL version, so any subclasses who do handle drawPath aren't + // required to override drawOval. + this->drawPath(SkPath::Oval(oval), paint, true); +} + +void SkBitmapDevice::drawRRect(const SkRRect& rrect, const SkPaint& paint) { +#ifdef SK_IGNORE_BLURRED_RRECT_OPT + // call the VIRTUAL version, so any subclasses who do handle drawPath aren't + // required to override drawRRect. + this->drawPath(SkPath::RRect(rrect), paint, true); +#else + LOOP_TILER( drawRRect(rrect, paint), Bounder(rrect.getBounds(), paint)) +#endif +} + +void SkBitmapDevice::drawPath(const SkPath& path, + const SkPaint& paint, + bool pathIsMutable) { + const SkRect* bounds = nullptr; + if (SkDrawTiler::NeedsTiling(this) && !path.isInverseFillType()) { + bounds = &path.getBounds(); + } + SkDrawTiler tiler(this, bounds ? Bounder(*bounds, paint).bounds() : nullptr); + if (tiler.needsTiling()) { + pathIsMutable = false; + } + while (const SkDraw* draw = tiler.next()) { + draw->drawPath(path, paint, nullptr, pathIsMutable); + } +} + +void SkBitmapDevice::drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix, + const SkRect* dstOrNull, const SkSamplingOptions& sampling, + const SkPaint& paint) { + const SkRect* bounds = dstOrNull; + SkRect storage; + if (!bounds && SkDrawTiler::NeedsTiling(this)) { + matrix.mapRect(&storage, SkRect::MakeIWH(bitmap.width(), bitmap.height())); + Bounder b(storage, paint); + if (b.hasBounds()) { + storage = *b.bounds(); + bounds = &storage; + } + } + LOOP_TILER(drawBitmap(bitmap, matrix, dstOrNull, sampling, paint), bounds) +} + +static inline bool CanApplyDstMatrixAsCTM(const SkMatrix& m, const SkPaint& paint) { + if (!paint.getMaskFilter()) { + return true; + } + + // Some mask filters parameters (sigma) depend on the CTM/scale. + return m.getType() <= SkMatrix::kTranslate_Mask; +} + +void SkBitmapDevice::drawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint& paint, + SkCanvas::SrcRectConstraint constraint) { + SkASSERT(dst.isFinite()); + SkASSERT(dst.isSorted()); + + SkBitmap bitmap; + // TODO: Elevate direct context requirement to public API and remove cheat. + auto dContext = as_IB(image)->directContext(); + if (!as_IB(image)->getROPixels(dContext, &bitmap)) { + return; + } + + SkRect bitmapBounds, tmpSrc, tmpDst; + SkBitmap tmpBitmap; + + bitmapBounds.setIWH(bitmap.width(), bitmap.height()); + + // Compute matrix from the two rectangles + if (src) { + tmpSrc = *src; + } else { + tmpSrc = bitmapBounds; + } + SkMatrix matrix = SkMatrix::RectToRect(tmpSrc, dst); + + const SkRect* dstPtr = &dst; + const SkBitmap* bitmapPtr = &bitmap; + + // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if + // needed (if the src was clipped). No check needed if src==null. + if (src) { + if (!bitmapBounds.contains(*src)) { + if (!tmpSrc.intersect(bitmapBounds)) { + return; // nothing to draw + } + // recompute dst, based on the smaller tmpSrc + matrix.mapRect(&tmpDst, tmpSrc); + if (!tmpDst.isFinite()) { + return; + } + dstPtr = &tmpDst; + } + } + + if (src && !src->contains(bitmapBounds) && + SkCanvas::kFast_SrcRectConstraint == constraint && + sampling != SkSamplingOptions()) { + // src is smaller than the bounds of the bitmap, and we are filtering, so we don't know + // how much more of the bitmap we need, so we can't use extractSubset or drawBitmap, + // but we must use a shader w/ dst bounds (which can access all of the bitmap needed). + goto USE_SHADER; + } + + if (src) { + // since we may need to clamp to the borders of the src rect within + // the bitmap, we extract a subset. + const SkIRect srcIR = tmpSrc.roundOut(); + if (!bitmap.extractSubset(&tmpBitmap, srcIR)) { + return; + } + bitmapPtr = &tmpBitmap; + + // Since we did an extract, we need to adjust the matrix accordingly + SkScalar dx = 0, dy = 0; + if (srcIR.fLeft > 0) { + dx = SkIntToScalar(srcIR.fLeft); + } + if (srcIR.fTop > 0) { + dy = SkIntToScalar(srcIR.fTop); + } + if (dx || dy) { + matrix.preTranslate(dx, dy); + } + +#ifdef SK_DRAWBITMAPRECT_FAST_OFFSET + SkRect extractedBitmapBounds = SkRect::MakeXYWH(dx, dy, + SkIntToScalar(bitmapPtr->width()), + SkIntToScalar(bitmapPtr->height())); +#else + SkRect extractedBitmapBounds; + extractedBitmapBounds.setIWH(bitmapPtr->width(), bitmapPtr->height()); +#endif + if (extractedBitmapBounds == tmpSrc) { + // no fractional part in src, we can just call drawBitmap + goto USE_DRAWBITMAP; + } + } else { + USE_DRAWBITMAP: + // We can go faster by just calling drawBitmap, which will concat the + // matrix with the CTM, and try to call drawSprite if it can. If not, + // it will make a shader and call drawRect, as we do below. + if (CanApplyDstMatrixAsCTM(matrix, paint)) { + this->drawBitmap(*bitmapPtr, matrix, dstPtr, sampling, paint); + return; + } + } + + USE_SHADER: + + // construct a shader, so we can call drawRect with the dst + auto s = SkMakeBitmapShaderForPaint(paint, *bitmapPtr, SkTileMode::kClamp, SkTileMode::kClamp, + sampling, &matrix, kNever_SkCopyPixelsMode); + if (!s) { + return; + } + + SkPaint paintWithShader(paint); + paintWithShader.setStyle(SkPaint::kFill_Style); + paintWithShader.setShader(std::move(s)); + + // Call ourself, in case the subclass wanted to share this setup code + // but handle the drawRect code themselves. + this->drawRect(*dstPtr, paintWithShader); +} + +void SkBitmapDevice::onDrawGlyphRunList(SkCanvas* canvas, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) { + SkASSERT(!glyphRunList.hasRSXForm()); + LOOP_TILER( drawGlyphRunList(canvas, &fGlyphPainter, glyphRunList, drawingPaint), nullptr ) +} + +void SkBitmapDevice::drawVertices(const SkVertices* vertices, + sk_sp blender, + const SkPaint& paint, + bool skipColorXform) { +#ifdef SK_LEGACY_IGNORE_DRAW_VERTICES_BLEND_WITH_NO_SHADER + if (!paint.getShader()) { + blender = SkBlender::Mode(SkBlendMode::kDst); + } +#endif + BDDraw(this).drawVertices(vertices, std::move(blender), paint, skipColorXform); +} + +#ifdef SK_ENABLE_SKSL +void SkBitmapDevice::drawMesh(const SkMesh&, sk_sp, const SkPaint&) { + // TODO: Implement +} +#endif + +void SkBitmapDevice::drawAtlas(const SkRSXform xform[], + const SkRect tex[], + const SkColor colors[], + int count, + sk_sp blender, + const SkPaint& paint) { + // set this to true for performance comparisons with the old drawVertices way + if ((false)) { + this->INHERITED::drawAtlas(xform, tex, colors, count, std::move(blender), paint); + return; + } + BDDraw(this).drawAtlas(xform, tex, colors, count, std::move(blender), paint); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkBitmapDevice::drawDevice(SkBaseDevice* device, const SkSamplingOptions& sampling, + const SkPaint& paint) { + SkASSERT(!paint.getImageFilter()); + SkASSERT(!paint.getMaskFilter()); + + this->INHERITED::drawDevice(device, sampling, paint); +} + +void SkBitmapDevice::drawSpecial(SkSpecialImage* src, + const SkMatrix& localToDevice, + const SkSamplingOptions& sampling, + const SkPaint& paint) { + SkASSERT(!paint.getImageFilter()); + SkASSERT(!paint.getMaskFilter()); + SkASSERT(!src->isTextureBacked()); + + SkBitmap resultBM; + if (src->getROPixels(&resultBM)) { + SkDraw draw; + SkMatrixProvider matrixProvider(localToDevice); + if (!this->accessPixels(&draw.fDst)) { + return; // no pixels to draw to so skip it + } + draw.fMatrixProvider = &matrixProvider; + draw.fRC = &fRCStack.rc(); + draw.drawBitmap(resultBM, SkMatrix::I(), nullptr, sampling, paint); + } +} +sk_sp SkBitmapDevice::makeSpecial(const SkBitmap& bitmap) { + return SkSpecialImage::MakeFromRaster(bitmap.bounds(), bitmap, this->surfaceProps()); +} + +sk_sp SkBitmapDevice::makeSpecial(const SkImage* image) { + return SkSpecialImage::MakeFromImage(nullptr, SkIRect::MakeWH(image->width(), image->height()), + image->makeNonTextureImage(), this->surfaceProps()); +} + +sk_sp SkBitmapDevice::snapSpecial(const SkIRect& bounds, bool forceCopy) { + if (forceCopy) { + return SkSpecialImage::CopyFromRaster(bounds, fBitmap, this->surfaceProps()); + } else { + return SkSpecialImage::MakeFromRaster(bounds, fBitmap, this->surfaceProps()); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkBitmapDevice::makeSurface(const SkImageInfo& info, const SkSurfaceProps& props) { + return SkSurface::MakeRaster(info, &props); +} + +SkImageFilterCache* SkBitmapDevice::getImageFilterCache() { + SkImageFilterCache* cache = SkImageFilterCache::Get(); + cache->ref(); + return cache; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkBitmapDevice::onSave() { + fRCStack.save(); +} + +void SkBitmapDevice::onRestore() { + fRCStack.restore(); +} + +void SkBitmapDevice::onClipRect(const SkRect& rect, SkClipOp op, bool aa) { + fRCStack.clipRect(this->localToDevice(), rect, op, aa); +} + +void SkBitmapDevice::onClipRRect(const SkRRect& rrect, SkClipOp op, bool aa) { + fRCStack.clipRRect(this->localToDevice(), rrect, op, aa); +} + +void SkBitmapDevice::onClipPath(const SkPath& path, SkClipOp op, bool aa) { + fRCStack.clipPath(this->localToDevice(), path, op, aa); +} + +void SkBitmapDevice::onClipShader(sk_sp sh) { + fRCStack.clipShader(std::move(sh)); +} + +void SkBitmapDevice::onClipRegion(const SkRegion& rgn, SkClipOp op) { + SkIPoint origin = this->getOrigin(); + SkRegion tmp; + const SkRegion* ptr = &rgn; + if (origin.fX | origin.fY) { + // translate from "global/canvas" coordinates to relative to this device + rgn.translate(-origin.fX, -origin.fY, &tmp); + ptr = &tmp; + } + fRCStack.clipRegion(*ptr, op); +} + +void SkBitmapDevice::onReplaceClip(const SkIRect& rect) { + // Transform from "global/canvas" coordinates to relative to this device + SkRect deviceRect = SkMatrixPriv::MapRect(this->globalToDevice(), SkRect::Make(rect)); + fRCStack.replaceClip(deviceRect.round()); +} + +bool SkBitmapDevice::onClipIsWideOpen() const { + const SkRasterClip& rc = fRCStack.rc(); + // If we're AA, we can't be wide-open (we would represent that as BW) + return rc.isBW() && rc.bwRgn().isRect() && + rc.bwRgn().getBounds() == SkIRect{0, 0, this->width(), this->height()}; +} + +bool SkBitmapDevice::onClipIsAA() const { + const SkRasterClip& rc = fRCStack.rc(); + return !rc.isEmpty() && rc.isAA(); +} + +void SkBitmapDevice::onAsRgnClip(SkRegion* rgn) const { + const SkRasterClip& rc = fRCStack.rc(); + if (rc.isAA()) { + rgn->setRect(rc.getBounds()); + } else { + *rgn = rc.bwRgn(); + } +} + +void SkBitmapDevice::validateDevBounds(const SkIRect& drawClipBounds) { +#ifdef SK_DEBUG + const SkIRect& stackBounds = fRCStack.rc().getBounds(); + SkASSERT(drawClipBounds == stackBounds); +#endif +} + +SkBaseDevice::ClipType SkBitmapDevice::onGetClipType() const { + const SkRasterClip& rc = fRCStack.rc(); + if (rc.isEmpty()) { + return ClipType::kEmpty; + } else if (rc.isRect() && !SkToBool(rc.clipShader())) { + return ClipType::kRect; + } else { + return ClipType::kComplex; + } +} + +SkIRect SkBitmapDevice::onDevClipBounds() const { + return fRCStack.rc().getBounds(); +} diff --git a/gfx/skia/skia/src/core/SkBitmapDevice.h b/gfx/skia/skia/src/core/SkBitmapDevice.h new file mode 100644 index 0000000000..d5985b8577 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmapDevice.h @@ -0,0 +1,167 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBitmapDevice_DEFINED +#define SkBitmapDevice_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "src/core/SkDevice.h" +#include "src/core/SkGlyphRunPainter.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRasterClipStack.h" + +class SkImageFilterCache; +class SkMatrix; +class SkPaint; +class SkPath; +class SkPixmap; +class SkRasterHandleAllocator; +class SkRRect; +class SkSurface; +class SkSurfaceProps; +struct SkPoint; +#ifdef SK_ENABLE_SKSL +class SkMesh; +#endif +/////////////////////////////////////////////////////////////////////////////// +class SkBitmapDevice : public SkBaseDevice { +public: + /** + * Construct a new device with the specified bitmap as its backend. It is + * valid for the bitmap to have no pixels associated with it. In that case, + * any drawing to this device will have no effect. + */ + SkBitmapDevice(const SkBitmap& bitmap); + + /** + * Create a new device along with its requisite pixel memory using + * default SkSurfaceProps (i.e., kLegacyFontHost_InitType-style). + * Note: this entry point is slated for removal - no one should call it. + */ + static SkBitmapDevice* Create(const SkImageInfo& info); + + /** + * Construct a new device with the specified bitmap as its backend. It is + * valid for the bitmap to have no pixels associated with it. In that case, + * any drawing to this device will have no effect. + */ + SkBitmapDevice(const SkBitmap& bitmap, const SkSurfaceProps& surfaceProps, + void* externalHandle = nullptr); + + static SkBitmapDevice* Create(const SkImageInfo&, const SkSurfaceProps&, + SkRasterHandleAllocator* = nullptr); + +protected: + void* getRasterHandle() const override { return fRasterHandle; } + + /** These are called inside the per-device-layer loop for each draw call. + When these are called, we have already applied any saveLayer operations, + and are handling any looping from the paint. + */ + void drawPaint(const SkPaint& paint) override; + void drawPoints(SkCanvas::PointMode mode, size_t count, + const SkPoint[], const SkPaint& paint) override; + void drawRect(const SkRect& r, const SkPaint& paint) override; + void drawOval(const SkRect& oval, const SkPaint& paint) override; + void drawRRect(const SkRRect& rr, const SkPaint& paint) override; + + /** + * If pathIsMutable, then the implementation is allowed to cast path to a + * non-const pointer and modify it in place (as an optimization). Canvas + * may do this to implement helpers such as drawOval, by placing a temp + * path on the stack to hold the representation of the oval. + */ + void drawPath(const SkPath&, const SkPaint&, bool pathIsMutable) override; + + void drawImageRect(const SkImage*, const SkRect* src, const SkRect& dst, + const SkSamplingOptions&, const SkPaint&, + SkCanvas::SrcRectConstraint) override; + + void drawVertices(const SkVertices*, sk_sp, const SkPaint&, bool) override; +#ifdef SK_ENABLE_SKSL + void drawMesh(const SkMesh&, sk_sp, const SkPaint&) override; +#endif + + void drawAtlas(const SkRSXform[], const SkRect[], const SkColor[], int count, sk_sp, + const SkPaint&) override; + + /////////////////////////////////////////////////////////////////////////// + + void drawDevice(SkBaseDevice*, const SkSamplingOptions&, const SkPaint&) override; + void drawSpecial(SkSpecialImage*, const SkMatrix&, const SkSamplingOptions&, + const SkPaint&) override; + + sk_sp makeSpecial(const SkBitmap&) override; + sk_sp makeSpecial(const SkImage*) override; + sk_sp snapSpecial(const SkIRect&, bool forceCopy = false) override; + void setImmutable() override { fBitmap.setImmutable(); } + + /////////////////////////////////////////////////////////////////////////// + + void onDrawGlyphRunList(SkCanvas*, + const sktext::GlyphRunList&, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) override; + bool onReadPixels(const SkPixmap&, int x, int y) override; + bool onWritePixels(const SkPixmap&, int, int) override; + bool onPeekPixels(SkPixmap*) override; + bool onAccessPixels(SkPixmap*) override; + + void onSave() override; + void onRestore() override; + void onClipRect(const SkRect& rect, SkClipOp, bool aa) override; + void onClipRRect(const SkRRect& rrect, SkClipOp, bool aa) override; + void onClipPath(const SkPath& path, SkClipOp, bool aa) override; + void onClipShader(sk_sp) override; + void onClipRegion(const SkRegion& deviceRgn, SkClipOp) override; + void onReplaceClip(const SkIRect& rect) override; + bool onClipIsAA() const override; + bool onClipIsWideOpen() const override; + void onAsRgnClip(SkRegion*) const override; + void validateDevBounds(const SkIRect& r) override; + ClipType onGetClipType() const override; + SkIRect onDevClipBounds() const override; + + void drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect* dstOrNull, + const SkSamplingOptions&, const SkPaint&); + +private: + friend class SkCanvas; + friend class SkDraw; + friend class SkDrawBase; + friend class SkDrawTiler; + friend class SkSurface_Raster; + + class BDDraw; + + // used to change the backend's pixels (and possibly config/rowbytes) + // but cannot change the width/height, so there should be no change to + // any clip information. + void replaceBitmapBackendForRasterSurface(const SkBitmap&) override; + + SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override; + + sk_sp makeSurface(const SkImageInfo&, const SkSurfaceProps&) override; + + SkImageFilterCache* getImageFilterCache() override; + + SkBitmap fBitmap; + void* fRasterHandle = nullptr; + SkRasterClipStack fRCStack; + SkGlyphRunListPainterCPU fGlyphPainter; + + + using INHERITED = SkBaseDevice; +}; + +#endif // SkBitmapDevice_DEFINED diff --git a/gfx/skia/skia/src/core/SkBitmapProcState.cpp b/gfx/skia/skia/src/core/SkBitmapProcState.cpp new file mode 100644 index 0000000000..7f7dfd6db4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmapProcState.cpp @@ -0,0 +1,694 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImageEncoder.h" +#include "include/core/SkPaint.h" +#include "include/core/SkShader.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTPin.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkBitmapProcState.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkMipmapAccessor.h" +#include "src/core/SkOpts.h" +#include "src/core/SkResourceCache.h" + +// One-stop-shop shader for, +// - nearest-neighbor sampling (_nofilter_), +// - clamp tiling in X and Y both (Clamp_), +// - with at most a scale and translate matrix (_DX_), +// - and no extra alpha applied (_opaque_), +// - sampling from 8888 (_S32_) and drawing to 8888 (_S32_). +static void Clamp_S32_opaque_D32_nofilter_DX_shaderproc(const void* sIn, int x, int y, + SkPMColor* dst, int count) { + const SkBitmapProcState& s = *static_cast(sIn); + SkASSERT(s.fInvMatrix.isScaleTranslate()); + SkASSERT(s.fAlphaScale == 256); + + const unsigned maxX = s.fPixmap.width() - 1; + SkFractionalInt fx; + int dstY; + { + const SkBitmapProcStateAutoMapper mapper(s, x, y); + const unsigned maxY = s.fPixmap.height() - 1; + dstY = SkTPin(mapper.intY(), 0, maxY); + fx = mapper.fractionalIntX(); + } + + const SkPMColor* src = s.fPixmap.addr32(0, dstY); + const SkFractionalInt dx = s.fInvSxFractionalInt; + + // Check if we're safely inside [0...maxX] so no need to clamp each computed index. + // + if ((uint64_t)SkFractionalIntToInt(fx) <= maxX && + (uint64_t)SkFractionalIntToInt(fx + dx * (count - 1)) <= maxX) + { + int count4 = count >> 2; + for (int i = 0; i < count4; ++i) { + SkPMColor src0 = src[SkFractionalIntToInt(fx)]; fx += dx; + SkPMColor src1 = src[SkFractionalIntToInt(fx)]; fx += dx; + SkPMColor src2 = src[SkFractionalIntToInt(fx)]; fx += dx; + SkPMColor src3 = src[SkFractionalIntToInt(fx)]; fx += dx; + dst[0] = src0; + dst[1] = src1; + dst[2] = src2; + dst[3] = src3; + dst += 4; + } + for (int i = (count4 << 2); i < count; ++i) { + unsigned index = SkFractionalIntToInt(fx); + SkASSERT(index <= maxX); + *dst++ = src[index]; + fx += dx; + } + } else { + for (int i = 0; i < count; ++i) { + dst[i] = src[SkTPin(SkFractionalIntToInt(fx), 0, maxX)]; + fx += dx; + } + } +} + +static void S32_alpha_D32_nofilter_DX(const SkBitmapProcState& s, + const uint32_t* xy, int count, SkPMColor* colors) { + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(s.fInvMatrix.isScaleTranslate()); + SkASSERT(!s.fBilerp); + SkASSERT(4 == s.fPixmap.info().bytesPerPixel()); + SkASSERT(s.fAlphaScale <= 256); + + // xy is a 32-bit y-coordinate, followed by 16-bit x-coordinates. + unsigned y = *xy++; + SkASSERT(y < (unsigned)s.fPixmap.height()); + + auto row = (const SkPMColor*)( (const char*)s.fPixmap.addr() + y * s.fPixmap.rowBytes() ); + + if (1 == s.fPixmap.width()) { + SkOpts::memset32(colors, SkAlphaMulQ(row[0], s.fAlphaScale), count); + return; + } + + // Step 4 xs == 2 uint32_t at a time. + while (count >= 4) { + uint32_t x01 = *xy++, + x23 = *xy++; + + SkPMColor p0 = row[UNPACK_PRIMARY_SHORT (x01)]; + SkPMColor p1 = row[UNPACK_SECONDARY_SHORT(x01)]; + SkPMColor p2 = row[UNPACK_PRIMARY_SHORT (x23)]; + SkPMColor p3 = row[UNPACK_SECONDARY_SHORT(x23)]; + + *colors++ = SkAlphaMulQ(p0, s.fAlphaScale); + *colors++ = SkAlphaMulQ(p1, s.fAlphaScale); + *colors++ = SkAlphaMulQ(p2, s.fAlphaScale); + *colors++ = SkAlphaMulQ(p3, s.fAlphaScale); + + count -= 4; + } + + // Step 1 x == 1 uint16_t at a time. + auto x = (const uint16_t*)xy; + while (count --> 0) { + *colors++ = SkAlphaMulQ(row[*x++], s.fAlphaScale); + } +} + +static void S32_alpha_D32_nofilter_DXDY(const SkBitmapProcState& s, + const uint32_t* xy, int count, SkPMColor* colors) { + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(!s.fBilerp); + SkASSERT(4 == s.fPixmap.info().bytesPerPixel()); + SkASSERT(s.fAlphaScale <= 256); + + auto src = (const char*)s.fPixmap.addr(); + size_t rb = s.fPixmap.rowBytes(); + + while (count --> 0) { + uint32_t XY = *xy++, + x = XY & 0xffff, + y = XY >> 16; + SkASSERT(x < (unsigned)s.fPixmap.width ()); + SkASSERT(y < (unsigned)s.fPixmap.height()); + *colors++ = ((const SkPMColor*)(src + y*rb))[x]; + } +} + +SkBitmapProcState::SkBitmapProcState(const SkImage_Base* image, SkTileMode tmx, SkTileMode tmy) + : fImage(image) + , fTileModeX(tmx) + , fTileModeY(tmy) +{} + +// true iff the matrix has a scale and no more than an optional translate. +static bool matrix_only_scale_translate(const SkMatrix& m) { + return (m.getType() & ~SkMatrix::kTranslate_Mask) == SkMatrix::kScale_Mask; +} + +/** + * For the purposes of drawing bitmaps, if a matrix is "almost" translate + * go ahead and treat it as if it were, so that subsequent code can go fast. + */ +static bool just_trans_general(const SkMatrix& matrix) { + SkASSERT(matrix_only_scale_translate(matrix)); + + const SkScalar tol = SK_Scalar1 / 32768; + + return SkScalarNearlyZero(matrix[SkMatrix::kMScaleX] - SK_Scalar1, tol) + && SkScalarNearlyZero(matrix[SkMatrix::kMScaleY] - SK_Scalar1, tol); +} + +/** + * Determine if the matrix can be treated as integral-only-translate, + * for the purpose of filtering. + */ +static bool just_trans_integral(const SkMatrix& m) { + static constexpr SkScalar tol = SK_Scalar1 / 256; + + return m.getType() <= SkMatrix::kTranslate_Mask + && SkScalarNearlyEqual(m.getTranslateX(), SkScalarRoundToScalar(m.getTranslateX()), tol) + && SkScalarNearlyEqual(m.getTranslateY(), SkScalarRoundToScalar(m.getTranslateY()), tol); +} + +static bool valid_for_filtering(unsigned dimension) { + // for filtering, width and height must fit in 14bits, since we use steal + // 2 bits from each to store our 4bit subpixel data + return (dimension & ~0x3FFF) == 0; +} + +bool SkBitmapProcState::init(const SkMatrix& inv, SkAlpha paintAlpha, + const SkSamplingOptions& sampling) { + SkASSERT(!inv.hasPerspective()); + SkASSERT(SkOpts::S32_alpha_D32_filter_DXDY || inv.isScaleTranslate()); + SkASSERT(!sampling.isAniso()); + SkASSERT(!sampling.useCubic); + SkASSERT(sampling.mipmap != SkMipmapMode::kLinear); + + fPixmap.reset(); + fBilerp = false; + + auto* access = SkMipmapAccessor::Make(&fAlloc, (const SkImage*)fImage, inv, sampling.mipmap); + if (!access) { + return false; + } + std::tie(fPixmap, fInvMatrix) = access->level(); + fInvMatrix.preConcat(inv); + + fPaintAlpha = paintAlpha; + fBilerp = sampling.filter == SkFilterMode::kLinear; + SkASSERT(fPixmap.addr()); + + bool integral_translate_only = just_trans_integral(fInvMatrix); + if (!integral_translate_only) { + // Most of the scanline procs deal with "unit" texture coordinates, as this + // makes it easy to perform tiling modes (repeat = (x & 0xFFFF)). To generate + // those, we divide the matrix by its dimensions here. + // + // We don't do this if we're either trivial (can ignore the matrix) or clamping + // in both X and Y since clamping to width,height is just as easy as to 0xFFFF. + + if (fTileModeX != SkTileMode::kClamp || fTileModeY != SkTileMode::kClamp) { + SkMatrixPriv::PostIDiv(&fInvMatrix, fPixmap.width(), fPixmap.height()); + } + + // Now that all possible changes to the matrix have taken place, check + // to see if we're really close to a no-scale matrix. If so, explicitly + // set it to be so. Subsequent code may inspect this matrix to choose + // a faster path in this case. + + // This code will only execute if the matrix has some scale component; + // if it's already pure translate then we won't do this inversion. + + if (matrix_only_scale_translate(fInvMatrix)) { + SkMatrix forward; + if (fInvMatrix.invert(&forward) && just_trans_general(forward)) { + fInvMatrix.setTranslate(-forward.getTranslateX(), -forward.getTranslateY()); + } + } + + // Recompute the flag after matrix adjustments. + integral_translate_only = just_trans_integral(fInvMatrix); + } + + if (fBilerp && + (!valid_for_filtering(fPixmap.width() | fPixmap.height()) || integral_translate_only)) { + fBilerp = false; + } + + return true; +} + +/* + * Analyze filter-quality and matrix, and decide how to implement that. + * + * In general, we cascade down the request level [ High ... None ] + * - for a given level, if we can fulfill it, fine, else + * - else we downgrade to the next lower level and try again. + * We can always fulfill requests for Low and None + * - sometimes we will "ignore" Low and give None, but this is likely a legacy perf hack + * and may be removed. + */ +bool SkBitmapProcState::chooseProcs() { + SkASSERT(!fInvMatrix.hasPerspective()); + SkASSERT(SkOpts::S32_alpha_D32_filter_DXDY || fInvMatrix.isScaleTranslate()); + SkASSERT(fPixmap.colorType() == kN32_SkColorType); + SkASSERT(fPixmap.alphaType() == kPremul_SkAlphaType || + fPixmap.alphaType() == kOpaque_SkAlphaType); + + SkASSERT(fTileModeX != SkTileMode::kDecal); + + fInvProc = SkMatrixPriv::GetMapXYProc(fInvMatrix); + fInvSxFractionalInt = SkScalarToFractionalInt(fInvMatrix.getScaleX()); + fInvKyFractionalInt = SkScalarToFractionalInt(fInvMatrix.getSkewY ()); + + fAlphaScale = SkAlpha255To256(fPaintAlpha); + + bool translate_only = (fInvMatrix.getType() & ~SkMatrix::kTranslate_Mask) == 0; + fMatrixProc = this->chooseMatrixProc(translate_only); + SkASSERT(fMatrixProc); + + if (fInvMatrix.isScaleTranslate()) { + fSampleProc32 = fBilerp ? SkOpts::S32_alpha_D32_filter_DX : S32_alpha_D32_nofilter_DX ; + } else { + fSampleProc32 = fBilerp ? SkOpts::S32_alpha_D32_filter_DXDY : S32_alpha_D32_nofilter_DXDY; + } + SkASSERT(fSampleProc32); + + fShaderProc32 = this->chooseShaderProc32(); + + // our special-case shaderprocs + // TODO: move this one into chooseShaderProc32() or pull all that in here. + if (nullptr == fShaderProc32 + && fAlphaScale == 256 + && !fBilerp + && SkTileMode::kClamp == fTileModeX + && SkTileMode::kClamp == fTileModeY + && fInvMatrix.isScaleTranslate()) { + fShaderProc32 = Clamp_S32_opaque_D32_nofilter_DX_shaderproc; + } + + return true; +} + +static void Clamp_S32_D32_nofilter_trans_shaderproc(const void* sIn, + int x, int y, + SkPMColor* colors, + int count) { + const SkBitmapProcState& s = *static_cast(sIn); + SkASSERT(s.fInvMatrix.isTranslate()); + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(!s.fBilerp); + + const int maxX = s.fPixmap.width() - 1; + const int maxY = s.fPixmap.height() - 1; + int ix = s.fFilterOneX + x; + int iy = SkTPin(s.fFilterOneY + y, 0, maxY); + const SkPMColor* row = s.fPixmap.addr32(0, iy); + + // clamp to the left + if (ix < 0) { + int n = std::min(-ix, count); + SkOpts::memset32(colors, row[0], n); + count -= n; + if (0 == count) { + return; + } + colors += n; + SkASSERT(-ix == n); + ix = 0; + } + // copy the middle + if (ix <= maxX) { + int n = std::min(maxX - ix + 1, count); + memcpy(colors, row + ix, n * sizeof(SkPMColor)); + count -= n; + if (0 == count) { + return; + } + colors += n; + } + SkASSERT(count > 0); + // clamp to the right + SkOpts::memset32(colors, row[maxX], count); +} + +static inline int sk_int_mod(int x, int n) { + SkASSERT(n > 0); + if ((unsigned)x >= (unsigned)n) { + if (x < 0) { + x = n + ~(~x % n); + } else { + x = x % n; + } + } + return x; +} + +static inline int sk_int_mirror(int x, int n) { + x = sk_int_mod(x, 2 * n); + if (x >= n) { + x = n + ~(x - n); + } + return x; +} + +static void Repeat_S32_D32_nofilter_trans_shaderproc(const void* sIn, + int x, int y, + SkPMColor* colors, + int count) { + const SkBitmapProcState& s = *static_cast(sIn); + SkASSERT(s.fInvMatrix.isTranslate()); + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(!s.fBilerp); + + const int stopX = s.fPixmap.width(); + const int stopY = s.fPixmap.height(); + int ix = s.fFilterOneX + x; + int iy = sk_int_mod(s.fFilterOneY + y, stopY); + const SkPMColor* row = s.fPixmap.addr32(0, iy); + + ix = sk_int_mod(ix, stopX); + for (;;) { + int n = std::min(stopX - ix, count); + memcpy(colors, row + ix, n * sizeof(SkPMColor)); + count -= n; + if (0 == count) { + return; + } + colors += n; + ix = 0; + } +} + +static inline void filter_32_alpha(unsigned t, + SkPMColor color0, + SkPMColor color1, + SkPMColor* dstColor, + unsigned alphaScale) { + SkASSERT((unsigned)t <= 0xF); + SkASSERT(alphaScale <= 256); + + const uint32_t mask = 0xFF00FF; + + int scale = 256 - 16*t; + uint32_t lo = (color0 & mask) * scale; + uint32_t hi = ((color0 >> 8) & mask) * scale; + + scale = 16*t; + lo += (color1 & mask) * scale; + hi += ((color1 >> 8) & mask) * scale; + + // TODO: if (alphaScale < 256) ... + lo = ((lo >> 8) & mask) * alphaScale; + hi = ((hi >> 8) & mask) * alphaScale; + + *dstColor = ((lo >> 8) & mask) | (hi & ~mask); +} + +static void S32_D32_constX_shaderproc(const void* sIn, + int x, int y, + SkPMColor* colors, + int count) { + const SkBitmapProcState& s = *static_cast(sIn); + SkASSERT(s.fInvMatrix.isScaleTranslate()); + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(1 == s.fPixmap.width()); + + int iY0; + int iY1 SK_INIT_TO_AVOID_WARNING; + int iSubY SK_INIT_TO_AVOID_WARNING; + + if (s.fBilerp) { + SkBitmapProcState::MatrixProc mproc = s.getMatrixProc(); + uint32_t xy[2]; + + mproc(s, xy, 1, x, y); + + iY0 = xy[0] >> 18; + iY1 = xy[0] & 0x3FFF; + iSubY = (xy[0] >> 14) & 0xF; + } else { + int yTemp; + + if (s.fInvMatrix.isTranslate()) { + yTemp = s.fFilterOneY + y; + } else{ + const SkBitmapProcStateAutoMapper mapper(s, x, y); + + // When the matrix has a scale component the setup code in + // chooseProcs multiples the inverse matrix by the inverse of the + // bitmap's width and height. Since this method is going to do + // its own tiling and sampling we need to undo that here. + if (SkTileMode::kClamp != s.fTileModeX || SkTileMode::kClamp != s.fTileModeY) { + yTemp = SkFractionalIntToInt(mapper.fractionalIntY() * s.fPixmap.height()); + } else { + yTemp = mapper.intY(); + } + } + + const int stopY = s.fPixmap.height(); + switch (s.fTileModeY) { + case SkTileMode::kClamp: + iY0 = SkTPin(yTemp, 0, stopY-1); + break; + case SkTileMode::kRepeat: + iY0 = sk_int_mod(yTemp, stopY); + break; + case SkTileMode::kMirror: + default: + iY0 = sk_int_mirror(yTemp, stopY); + break; + } + +#ifdef SK_DEBUG + { + const SkBitmapProcStateAutoMapper mapper(s, x, y); + int iY2; + + if (!s.fInvMatrix.isTranslate() && + (SkTileMode::kClamp != s.fTileModeX || SkTileMode::kClamp != s.fTileModeY)) { + iY2 = SkFractionalIntToInt(mapper.fractionalIntY() * s.fPixmap.height()); + } else { + iY2 = mapper.intY(); + } + + switch (s.fTileModeY) { + case SkTileMode::kClamp: + iY2 = SkTPin(iY2, 0, stopY-1); + break; + case SkTileMode::kRepeat: + iY2 = sk_int_mod(iY2, stopY); + break; + case SkTileMode::kMirror: + default: + iY2 = sk_int_mirror(iY2, stopY); + break; + } + + SkASSERT(iY0 == iY2); + } +#endif + } + + const SkPMColor* row0 = s.fPixmap.addr32(0, iY0); + SkPMColor color; + + if (s.fBilerp) { + const SkPMColor* row1 = s.fPixmap.addr32(0, iY1); + filter_32_alpha(iSubY, *row0, *row1, &color, s.fAlphaScale); + } else { + if (s.fAlphaScale < 256) { + color = SkAlphaMulQ(*row0, s.fAlphaScale); + } else { + color = *row0; + } + } + + SkOpts::memset32(colors, color, count); +} + +static void DoNothing_shaderproc(const void*, int x, int y, + SkPMColor* colors, int count) { + // if we get called, the matrix is too tricky, so we just draw nothing + SkOpts::memset32(colors, 0, count); +} + +bool SkBitmapProcState::setupForTranslate() { + SkPoint pt; + const SkBitmapProcStateAutoMapper mapper(*this, 0, 0, &pt); + + /* + * if the translate is larger than our ints, we can get random results, or + * worse, we might get 0x80000000, which wreaks havoc on us, since we can't + * negate it. + */ + const SkScalar too_big = SkIntToScalar(1 << 30); + if (SkScalarAbs(pt.fX) > too_big || SkScalarAbs(pt.fY) > too_big) { + return false; + } + + // Since we know we're not filtered, we re-purpose these fields allow + // us to go from device -> src coordinates w/ just an integer add, + // rather than running through the inverse-matrix + fFilterOneX = mapper.intX(); + fFilterOneY = mapper.intY(); + + return true; +} + +SkBitmapProcState::ShaderProc32 SkBitmapProcState::chooseShaderProc32() { + + if (kN32_SkColorType != fPixmap.colorType()) { + return nullptr; + } + + if (1 == fPixmap.width() && fInvMatrix.isScaleTranslate()) { + if (!fBilerp && fInvMatrix.isTranslate() && !this->setupForTranslate()) { + return DoNothing_shaderproc; + } + return S32_D32_constX_shaderproc; + } + + if (fAlphaScale < 256) { + return nullptr; + } + if (!fInvMatrix.isTranslate()) { + return nullptr; + } + if (fBilerp) { + return nullptr; + } + + SkTileMode tx = fTileModeX; + SkTileMode ty = fTileModeY; + + if (SkTileMode::kClamp == tx && SkTileMode::kClamp == ty) { + if (this->setupForTranslate()) { + return Clamp_S32_D32_nofilter_trans_shaderproc; + } + return DoNothing_shaderproc; + } + if (SkTileMode::kRepeat == tx && SkTileMode::kRepeat == ty) { + if (this->setupForTranslate()) { + return Repeat_S32_D32_nofilter_trans_shaderproc; + } + return DoNothing_shaderproc; + } + return nullptr; +} + +#ifdef SK_DEBUG + +static void check_scale_nofilter(uint32_t bitmapXY[], int count, + unsigned mx, unsigned my) { + unsigned y = *bitmapXY++; + SkASSERT(y < my); + + const uint16_t* xptr = reinterpret_cast(bitmapXY); + for (int i = 0; i < count; ++i) { + SkASSERT(xptr[i] < mx); + } +} + +static void check_scale_filter(uint32_t bitmapXY[], int count, + unsigned mx, unsigned my) { + uint32_t YY = *bitmapXY++; + unsigned y0 = YY >> 18; + unsigned y1 = YY & 0x3FFF; + SkASSERT(y0 < my); + SkASSERT(y1 < my); + + for (int i = 0; i < count; ++i) { + uint32_t XX = bitmapXY[i]; + unsigned x0 = XX >> 18; + unsigned x1 = XX & 0x3FFF; + SkASSERT(x0 < mx); + SkASSERT(x1 < mx); + } +} + +static void check_affine_nofilter(uint32_t bitmapXY[], int count, unsigned mx, unsigned my) { + for (int i = 0; i < count; ++i) { + uint32_t XY = bitmapXY[i]; + unsigned x = XY & 0xFFFF; + unsigned y = XY >> 16; + SkASSERT(x < mx); + SkASSERT(y < my); + } +} + +static void check_affine_filter(uint32_t bitmapXY[], int count, unsigned mx, unsigned my) { + for (int i = 0; i < count; ++i) { + uint32_t YY = *bitmapXY++; + unsigned y0 = YY >> 18; + unsigned y1 = YY & 0x3FFF; + SkASSERT(y0 < my); + SkASSERT(y1 < my); + + uint32_t XX = *bitmapXY++; + unsigned x0 = XX >> 18; + unsigned x1 = XX & 0x3FFF; + SkASSERT(x0 < mx); + SkASSERT(x1 < mx); + } +} + +void SkBitmapProcState::DebugMatrixProc(const SkBitmapProcState& state, + uint32_t bitmapXY[], int count, + int x, int y) { + SkASSERT(bitmapXY); + SkASSERT(count > 0); + + state.fMatrixProc(state, bitmapXY, count, x, y); + + void (*proc)(uint32_t bitmapXY[], int count, unsigned mx, unsigned my); + + if (state.fInvMatrix.isScaleTranslate()) { + proc = state.fBilerp ? check_scale_filter : check_scale_nofilter; + } else { + proc = state.fBilerp ? check_affine_filter : check_affine_nofilter; + } + + proc(bitmapXY, count, state.fPixmap.width(), state.fPixmap.height()); +} + +SkBitmapProcState::MatrixProc SkBitmapProcState::getMatrixProc() const { + return DebugMatrixProc; +} + +#endif + +/* + The storage requirements for the different matrix procs are as follows, + where each X or Y is 2 bytes, and N is the number of pixels/elements: + + scale/translate nofilter Y(4bytes) + N * X + affine/perspective nofilter N * (X Y) + scale/translate filter Y Y + N * (X X) + affine filter N * (Y Y X X) + */ +int SkBitmapProcState::maxCountForBufferSize(size_t bufferSize) const { + int32_t size = static_cast(bufferSize); + + size &= ~3; // only care about 4-byte aligned chunks + if (fInvMatrix.isScaleTranslate()) { + size -= 4; // the shared Y (or YY) coordinate + if (size < 0) { + size = 0; + } + size >>= 1; + } else { + size >>= 2; + } + + if (fBilerp) { + size >>= 1; + } + + return size; +} + diff --git a/gfx/skia/skia/src/core/SkBitmapProcState.h b/gfx/skia/skia/src/core/SkBitmapProcState.h new file mode 100644 index 0000000000..c6ab4c4bc6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmapProcState.h @@ -0,0 +1,209 @@ +/* + * Copyright 2007 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBitmapProcState_DEFINED +#define SkBitmapProcState_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkPaint.h" +#include "include/core/SkShader.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkFloatBits.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMipmapAccessor.h" + +typedef SkFixed3232 SkFractionalInt; +#define SkScalarToFractionalInt(x) SkScalarToFixed3232(x) +#define SkFractionalIntToFixed(x) SkFixed3232ToFixed(x) +#define SkFixedToFractionalInt(x) SkFixedToFixed3232(x) +#define SkFractionalIntToInt(x) SkFixed3232ToInt(x) + +class SkPaint; + +struct SkBitmapProcState { + SkBitmapProcState(const SkImage_Base* image, SkTileMode tmx, SkTileMode tmy); + + bool setup(const SkMatrix& inv, SkColor color, const SkSamplingOptions& sampling) { + return this->init(inv, color, sampling) + && this->chooseProcs(); + } + + typedef void (*ShaderProc32)(const void* ctx, int x, int y, SkPMColor[], int count); + + typedef void (*MatrixProc)(const SkBitmapProcState&, + uint32_t bitmapXY[], + int count, + int x, int y); + + typedef void (*SampleProc32)(const SkBitmapProcState&, + const uint32_t[], + int count, + SkPMColor colors[]); + + const SkImage_Base* fImage; + + SkPixmap fPixmap; + SkMatrix fInvMatrix; // This changes based on tile mode. + SkAlpha fPaintAlpha; + SkTileMode fTileModeX; + SkTileMode fTileModeY; + bool fBilerp; + + SkMatrixPriv::MapXYProc fInvProc; // chooseProcs + SkFractionalInt fInvSxFractionalInt; + SkFractionalInt fInvKyFractionalInt; + + SkFixed fFilterOneX; + SkFixed fFilterOneY; + + uint16_t fAlphaScale; // chooseProcs + + /** Given the byte size of the index buffer to be passed to the matrix proc, + return the maximum number of resulting pixels that can be computed + (i.e. the number of SkPMColor values to be written by the sample proc). + This routine takes into account that filtering and scale-vs-affine + affect the amount of buffer space needed. + + Only valid to call after chooseProcs (setContext) has been called. It is + safe to call this inside the shader's shadeSpan() method. + */ + int maxCountForBufferSize(size_t bufferSize) const; + + // If a shader proc is present, then the corresponding matrix/sample procs + // are ignored + ShaderProc32 getShaderProc32() const { return fShaderProc32; } + +#ifdef SK_DEBUG + MatrixProc getMatrixProc() const; +#else + MatrixProc getMatrixProc() const { return fMatrixProc; } +#endif + SampleProc32 getSampleProc32() const { return fSampleProc32; } + +private: + enum { + kBMStateSize = 136 // found by inspection. if too small, we will call new/delete + }; + SkSTArenaAlloc fAlloc; + + ShaderProc32 fShaderProc32; // chooseProcs + // These are used if the shaderproc is nullptr + MatrixProc fMatrixProc; // chooseProcs + SampleProc32 fSampleProc32; // chooseProcs + + bool init(const SkMatrix& inverse, SkAlpha, const SkSamplingOptions&); + bool chooseProcs(); + MatrixProc chooseMatrixProc(bool trivial_matrix); + ShaderProc32 chooseShaderProc32(); + + // Return false if we failed to setup for fast translate (e.g. overflow) + bool setupForTranslate(); + +#ifdef SK_DEBUG + static void DebugMatrixProc(const SkBitmapProcState&, + uint32_t[], int count, int x, int y); +#endif +}; + +/* Macros for packing and unpacking pairs of 16bit values in a 32bit uint. + Used to allow access to a stream of uint16_t either one at a time, or + 2 at a time by unpacking a uint32_t + */ +#ifdef SK_CPU_BENDIAN + #define PACK_TWO_SHORTS(pri, sec) ((pri) << 16 | (sec)) + #define UNPACK_PRIMARY_SHORT(packed) ((uint32_t)(packed) >> 16) + #define UNPACK_SECONDARY_SHORT(packed) ((packed) & 0xFFFF) +#else + #define PACK_TWO_SHORTS(pri, sec) ((pri) | ((sec) << 16)) + #define UNPACK_PRIMARY_SHORT(packed) ((packed) & 0xFFFF) + #define UNPACK_SECONDARY_SHORT(packed) ((uint32_t)(packed) >> 16) +#endif + +#ifdef SK_DEBUG + static inline uint32_t pack_two_shorts(U16CPU pri, U16CPU sec) { + SkASSERT((uint16_t)pri == pri); + SkASSERT((uint16_t)sec == sec); + return PACK_TWO_SHORTS(pri, sec); + } +#else + #define pack_two_shorts(pri, sec) PACK_TWO_SHORTS(pri, sec) +#endif + +// Helper class for mapping the middle of pixel (x, y) into SkFractionalInt bitmap space. +// Discussion: +// Overall, this code takes a point in destination space, and uses the center of the pixel +// at (x, y) to determine the sample point in source space. It then adjusts the pixel by different +// amounts based in filtering and tiling. +// This code can be broken into two main cases based on filtering: +// * no filtering (nearest neighbor) - when using nearest neighbor filtering all tile modes reduce +// the sampled by one ulp. If a simple point pt lies precisely on XXX.1/2 then it forced down +// when positive making 1/2 + 1/2 = .999999 instead of 1.0. +// * filtering - in the filtering case, the code calculates the -1/2 shift for starting the +// bilerp kernel. There is a twist; there is a big difference between clamp and the other tile +// modes. In tile and repeat the matrix has been reduced by an additional 1/width and 1/height +// factor. This maps from destination space to [0, 1) (instead of source space) to allow easy +// modulo arithmetic. This means that the -1/2 needed by bilerp is actually 1/2 * 1/width for x +// and 1/2 * 1/height for y. This is what happens when the poorly named fFilterOne{X|Y} is +// divided by two. +class SkBitmapProcStateAutoMapper { +public: + SkBitmapProcStateAutoMapper(const SkBitmapProcState& s, int x, int y, + SkPoint* scalarPoint = nullptr) { + SkPoint pt; + s.fInvProc(s.fInvMatrix, + SkIntToScalar(x) + SK_ScalarHalf, + SkIntToScalar(y) + SK_ScalarHalf, &pt); + + SkFixed biasX = 0, biasY = 0; + if (s.fBilerp) { + biasX = s.fFilterOneX >> 1; + biasY = s.fFilterOneY >> 1; + } else { + // Our rasterizer biases upward. That is a rect from 0.5...1.5 fills pixel 1 and not + // pixel 0. To make an image that is mapped 1:1 with device pixels but at a half pixel + // offset select every pixel from the src image once we make exact integer pixel sample + // values round down not up. Note that a mirror mapping will not have this property. + biasX = 1; + biasY = 1; + } + + // punt to unsigned for defined underflow behavior + fX = (SkFractionalInt)((uint64_t)SkScalarToFractionalInt(pt.x()) - + (uint64_t)SkFixedToFractionalInt(biasX)); + fY = (SkFractionalInt)((uint64_t)SkScalarToFractionalInt(pt.y()) - + (uint64_t)SkFixedToFractionalInt(biasY)); + + if (scalarPoint) { + scalarPoint->set(pt.x() - SkFixedToScalar(biasX), + pt.y() - SkFixedToScalar(biasY)); + } + } + + SkFractionalInt fractionalIntX() const { return fX; } + SkFractionalInt fractionalIntY() const { return fY; } + + SkFixed fixedX() const { return SkFractionalIntToFixed(fX); } + SkFixed fixedY() const { return SkFractionalIntToFixed(fY); } + + int intX() const { return SkFractionalIntToInt(fX); } + int intY() const { return SkFractionalIntToInt(fY); } + +private: + SkFractionalInt fX, fY; +}; + +namespace sktests { + // f is the value to pack, max is the largest the value can be. + uint32_t pack_clamp(SkFixed f, unsigned max); + // As above, but width is the width of the pretend bitmap. + uint32_t pack_repeat(SkFixed f, unsigned max, size_t width); + uint32_t pack_mirror(SkFixed f, unsigned max, size_t width); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkBitmapProcState_matrixProcs.cpp b/gfx/skia/skia/src/core/SkBitmapProcState_matrixProcs.cpp new file mode 100644 index 0000000000..184c63ea78 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBitmapProcState_matrixProcs.cpp @@ -0,0 +1,541 @@ +/* + * Copyright 2008 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkShader.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkBitmapProcState.h" +#include "src/core/SkOpts.h" + +/* + * The decal_ functions require that + * 1. dx > 0 + * 2. [fx, fx+dx, fx+2dx, fx+3dx, ... fx+(count-1)dx] are all <= maxX + * + * In addition, we use SkFractionalInt to keep more fractional precision than + * just SkFixed, so we will abort the decal_ call if dx is very small, since + * the decal_ function just operates on SkFixed. If that were changed, we could + * skip the very_small test here. + */ +static inline bool can_truncate_to_fixed_for_decal(SkFixed fx, + SkFixed dx, + int count, unsigned max) { + SkASSERT(count > 0); + + // if decal_ kept SkFractionalInt precision, this would just be dx <= 0 + // I just made up the 1/256. Just don't want to perceive accumulated error + // if we truncate frDx and lose its low bits. + if (dx <= SK_Fixed1 / 256) { + return false; + } + + // Note: it seems the test should be (fx <= max && lastFx <= max); but + // historically it's been a strict inequality check, and changing produces + // unexpected diffs. Further investigation is needed. + + // We cast to unsigned so we don't have to check for negative values, which + // will now appear as very large positive values, and thus fail our test! + if ((unsigned)SkFixedFloorToInt(fx) >= max) { + return false; + } + + // Promote to 64bit (48.16) to avoid overflow. + const uint64_t lastFx = fx + sk_64_mul(dx, count - 1); + + return SkTFitsIn(lastFx) && (unsigned)SkFixedFloorToInt(SkTo(lastFx)) < max; +} + +// When not filtering, we store 32-bit y, 16-bit x, 16-bit x, 16-bit x, ... +// When filtering we write out 32-bit encodings, pairing 14.4 x0 with 14-bit x1. + +// The clamp routines may try to fall into one of these unclamped decal fast-paths. +// (Only clamp works in the right coordinate space to check for decal.) +static void decal_nofilter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count) { + // can_truncate_to_fixed_for_decal() checked only that stepping fx+=dx count-1 + // times doesn't overflow fx, so we take unusual care not to step count times. + for (; count > 2; count -= 2) { + *dst++ = pack_two_shorts( (fx + 0) >> 16, + (fx + dx) >> 16); + fx += dx+dx; + } + + SkASSERT(count <= 2); + switch (count) { + case 2: ((uint16_t*)dst)[1] = SkToU16((fx + dx) >> 16); [[fallthrough]]; + case 1: ((uint16_t*)dst)[0] = SkToU16((fx + 0) >> 16); + } +} + +// A generic implementation for unfiltered scale+translate, templated on tiling method. +template +static void nofilter_scale(const SkBitmapProcState& s, + uint32_t xy[], int count, int x, int y) { + SkASSERT(s.fInvMatrix.isScaleTranslate()); + + // Write out our 32-bit y, and get our intial fx. + SkFractionalInt fx; + { + const SkBitmapProcStateAutoMapper mapper(s, x, y); + *xy++ = tiley(mapper.fixedY(), s.fPixmap.height() - 1); + fx = mapper.fractionalIntX(); + } + + const unsigned maxX = s.fPixmap.width() - 1; + if (0 == maxX) { + // If width == 1, all the x-values must refer to that pixel, and must be zero. + memset(xy, 0, count * sizeof(uint16_t)); + return; + } + + const SkFractionalInt dx = s.fInvSxFractionalInt; + + if (tryDecal) { + const SkFixed fixedFx = SkFractionalIntToFixed(fx); + const SkFixed fixedDx = SkFractionalIntToFixed(dx); + + if (can_truncate_to_fixed_for_decal(fixedFx, fixedDx, count, maxX)) { + decal_nofilter_scale(xy, fixedFx, fixedDx, count); + return; + } + } + + // Remember, each x-coordinate is 16-bit. + for (; count >= 2; count -= 2) { + *xy++ = pack_two_shorts(tilex(SkFractionalIntToFixed(fx ), maxX), + tilex(SkFractionalIntToFixed(fx + dx), maxX)); + fx += dx+dx; + } + + auto xx = (uint16_t*)xy; + while (count --> 0) { + *xx++ = tilex(SkFractionalIntToFixed(fx), maxX); + fx += dx; + } +} + +template +static void nofilter_affine(const SkBitmapProcState& s, + uint32_t xy[], int count, int x, int y) { + SkASSERT(!s.fInvMatrix.hasPerspective()); + + const SkBitmapProcStateAutoMapper mapper(s, x, y); + + SkFractionalInt fx = mapper.fractionalIntX(), + fy = mapper.fractionalIntY(), + dx = s.fInvSxFractionalInt, + dy = s.fInvKyFractionalInt; + int maxX = s.fPixmap.width () - 1, + maxY = s.fPixmap.height() - 1; + + while (count --> 0) { + *xy++ = (tiley(SkFractionalIntToFixed(fy), maxY) << 16) + | (tilex(SkFractionalIntToFixed(fx), maxX) ); + fx += dx; + fy += dy; + } +} + +// used when both tilex and tiley are clamp +// Extract the high four fractional bits from fx, the lerp parameter when filtering. +static unsigned extract_low_bits_clamp_clamp(SkFixed fx, int /*max*/) { + // If we're already scaled up to by max like clamp/decal, + // just grab the high four fractional bits. + return (fx >> 12) & 0xf; +} + +//used when one of tilex and tiley is not clamp +static unsigned extract_low_bits_general(SkFixed fx, int max) { + // In repeat or mirror fx is in [0,1], so scale up by max first. + // TODO: remove the +1 here and the -1 at the call sites... + return extract_low_bits_clamp_clamp((fx & 0xffff) * (max+1), max); +} + +// Takes a SkFixed number and packs it into a 32bit integer in the following schema: +// 14 bits to represent the low integer value (n) +// 4 bits to represent a linear distance between low and high (floored to nearest 1/16) +// 14 bits to represent the high integer value (n+1) +// If f is less than 0, then both integers will be 0. If f is greater than or equal to max, both +// integers will be that max value. In all cases, the middle 4 bits will represent the fractional +// part (to a resolution of 1/16). If the two integers are equal, doing any linear interpolation +// will result in the same integer, so the fractional part does not matter. +// +// The "one" parameter corresponds to the maximum distance between the high and low coordinate. +// For the clamp operation, this is just SkFixed1, but for others it is 1 / pixmap width because the +// distances are already normalized to between 0 and 1.0. +// +// See also SK_OPTS_NS::decode_packed_coordinates_and_weight for unpacking this value. +template +SK_NO_SANITIZE("signed-integer-overflow") +static uint32_t pack(SkFixed f, unsigned max, SkFixed one) { + uint32_t packed = tile(f, max); // low coordinate in high bits + packed = (packed << 4) | extract_low_bits(f, max); // (lerp weight _is_ coord fractional part) + packed = (packed << 14) | tile((f + one), max); // high coordinate in low bits + return packed; +} + +template +static void filter_scale(const SkBitmapProcState& s, + uint32_t xy[], int count, int x, int y) { + SkASSERT(s.fInvMatrix.isScaleTranslate()); + + const unsigned maxX = s.fPixmap.width() - 1; + const SkFractionalInt dx = s.fInvSxFractionalInt; + SkFractionalInt fx; + { + const SkBitmapProcStateAutoMapper mapper(s, x, y); + const unsigned maxY = s.fPixmap.height() - 1; + // compute our two Y values up front + *xy++ = pack(mapper.fixedY(), maxY, s.fFilterOneY); + // now initialize fx + fx = mapper.fractionalIntX(); + } + + // For historical reasons we check both ends are < maxX rather than <= maxX. + // TODO: try changing this? See also can_truncate_to_fixed_for_decal(). + if (tryDecal && + (unsigned)SkFractionalIntToInt(fx ) < maxX && + (unsigned)SkFractionalIntToInt(fx + dx*(count-1)) < maxX) { + while (count --> 0) { + SkFixed fixedFx = SkFractionalIntToFixed(fx); + SkASSERT((fixedFx >> (16 + 14)) == 0); + *xy++ = (fixedFx >> 12 << 14) | ((fixedFx >> 16) + 1); + fx += dx; + } + return; + } + + while (count --> 0) { + *xy++ = pack(SkFractionalIntToFixed(fx), maxX, s.fFilterOneX); + fx += dx; + } +} + +template +static void filter_affine(const SkBitmapProcState& s, + uint32_t xy[], int count, int x, int y) { + SkASSERT(!s.fInvMatrix.hasPerspective()); + + const SkBitmapProcStateAutoMapper mapper(s, x, y); + + SkFixed oneX = s.fFilterOneX, + oneY = s.fFilterOneY; + + SkFractionalInt fx = mapper.fractionalIntX(), + fy = mapper.fractionalIntY(), + dx = s.fInvSxFractionalInt, + dy = s.fInvKyFractionalInt; + unsigned maxX = s.fPixmap.width () - 1, + maxY = s.fPixmap.height() - 1; + while (count --> 0) { + *xy++ = pack(SkFractionalIntToFixed(fy), maxY, oneY); + *xy++ = pack(SkFractionalIntToFixed(fx), maxX, oneX); + + fy += dy; + fx += dx; + } +} + +// Helper to ensure that when we shift down, we do it w/o sign-extension +// so the caller doesn't have to manually mask off the top 16 bits. +static inline unsigned SK_USHIFT16(unsigned x) { + return x >> 16; +} + +static unsigned repeat(SkFixed fx, int max) { + SkASSERT(max < 65535); + return SK_USHIFT16((unsigned)(fx & 0xFFFF) * (max + 1)); +} +static unsigned mirror(SkFixed fx, int max) { + SkASSERT(max < 65535); + // s is 0xFFFFFFFF if we're on an odd interval, or 0 if an even interval + SkFixed s = SkLeftShift(fx, 15) >> 31; + + // This should be exactly the same as repeat(fx ^ s, max) from here on. + return SK_USHIFT16( ((fx ^ s) & 0xFFFF) * (max + 1) ); +} + +static unsigned clamp(SkFixed fx, int max) { + return SkTPin(fx >> 16, 0, max); +} + +static const SkBitmapProcState::MatrixProc ClampX_ClampY_Procs[] = { + nofilter_scale , filter_scale , + nofilter_affine, filter_affine, +}; +static const SkBitmapProcState::MatrixProc RepeatX_RepeatY_Procs[] = { + nofilter_scale , filter_scale , + nofilter_affine, filter_affine +}; +static const SkBitmapProcState::MatrixProc MirrorX_MirrorY_Procs[] = { + nofilter_scale , filter_scale , + nofilter_affine, filter_affine, +}; + + +/////////////////////////////////////////////////////////////////////////////// +// This next chunk has some specializations for unfiltered translate-only matrices. + +static inline U16CPU int_clamp(int x, int n) { + if (x < 0) { x = 0; } + if (x >= n) { x = n - 1; } + return x; +} + +/* returns 0...(n-1) given any x (positive or negative). + + As an example, if n (which is always positive) is 5... + + x: -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 + returns: 2 3 4 0 1 2 3 4 0 1 2 3 4 0 1 2 3 + */ +static inline int sk_int_mod(int x, int n) { + SkASSERT(n > 0); + if ((unsigned)x >= (unsigned)n) { + if (x < 0) { + x = n + ~(~x % n); + } else { + x = x % n; + } + } + return x; +} + +static inline U16CPU int_repeat(int x, int n) { + return sk_int_mod(x, n); +} + +static inline U16CPU int_mirror(int x, int n) { + x = sk_int_mod(x, 2 * n); + if (x >= n) { + x = n + ~(x - n); + } + return x; +} + +static void fill_sequential(uint16_t xptr[], int pos, int count) { + while (count --> 0) { + *xptr++ = pos++; + } +} + +static void fill_backwards(uint16_t xptr[], int pos, int count) { + while (count --> 0) { + SkASSERT(pos >= 0); + *xptr++ = pos--; + } +} + +template< U16CPU (tiley)(int x, int n) > +static void clampx_nofilter_trans(const SkBitmapProcState& s, + uint32_t xy[], int count, int x, int y) { + SkASSERT(s.fInvMatrix.isTranslate()); + + const SkBitmapProcStateAutoMapper mapper(s, x, y); + *xy++ = tiley(mapper.intY(), s.fPixmap.height()); + int xpos = mapper.intX(); + + const int width = s.fPixmap.width(); + if (1 == width) { + // all of the following X values must be 0 + memset(xy, 0, count * sizeof(uint16_t)); + return; + } + + uint16_t* xptr = reinterpret_cast(xy); + int n; + + // fill before 0 as needed + if (xpos < 0) { + n = -xpos; + if (n > count) { + n = count; + } + memset(xptr, 0, n * sizeof(uint16_t)); + count -= n; + if (0 == count) { + return; + } + xptr += n; + xpos = 0; + } + + // fill in 0..width-1 if needed + if (xpos < width) { + n = width - xpos; + if (n > count) { + n = count; + } + fill_sequential(xptr, xpos, n); + count -= n; + if (0 == count) { + return; + } + xptr += n; + } + + // fill the remaining with the max value + SkOpts::memset16(xptr, width - 1, count); +} + +template< U16CPU (tiley)(int x, int n) > +static void repeatx_nofilter_trans(const SkBitmapProcState& s, + uint32_t xy[], int count, int x, int y) { + SkASSERT(s.fInvMatrix.isTranslate()); + + const SkBitmapProcStateAutoMapper mapper(s, x, y); + *xy++ = tiley(mapper.intY(), s.fPixmap.height()); + int xpos = mapper.intX(); + + const int width = s.fPixmap.width(); + if (1 == width) { + // all of the following X values must be 0 + memset(xy, 0, count * sizeof(uint16_t)); + return; + } + + uint16_t* xptr = reinterpret_cast(xy); + int start = sk_int_mod(xpos, width); + int n = width - start; + if (n > count) { + n = count; + } + fill_sequential(xptr, start, n); + xptr += n; + count -= n; + + while (count >= width) { + fill_sequential(xptr, 0, width); + xptr += width; + count -= width; + } + + if (count > 0) { + fill_sequential(xptr, 0, count); + } +} + +template< U16CPU (tiley)(int x, int n) > +static void mirrorx_nofilter_trans(const SkBitmapProcState& s, + uint32_t xy[], int count, int x, int y) { + SkASSERT(s.fInvMatrix.isTranslate()); + + const SkBitmapProcStateAutoMapper mapper(s, x, y); + *xy++ = tiley(mapper.intY(), s.fPixmap.height()); + int xpos = mapper.intX(); + + const int width = s.fPixmap.width(); + if (1 == width) { + // all of the following X values must be 0 + memset(xy, 0, count * sizeof(uint16_t)); + return; + } + + uint16_t* xptr = reinterpret_cast(xy); + // need to know our start, and our initial phase (forward or backward) + bool forward; + int n; + int start = sk_int_mod(xpos, 2 * width); + if (start >= width) { + start = width + ~(start - width); + forward = false; + n = start + 1; // [start .. 0] + } else { + forward = true; + n = width - start; // [start .. width) + } + if (n > count) { + n = count; + } + if (forward) { + fill_sequential(xptr, start, n); + } else { + fill_backwards(xptr, start, n); + } + forward = !forward; + xptr += n; + count -= n; + + while (count >= width) { + if (forward) { + fill_sequential(xptr, 0, width); + } else { + fill_backwards(xptr, width - 1, width); + } + forward = !forward; + xptr += width; + count -= width; + } + + if (count > 0) { + if (forward) { + fill_sequential(xptr, 0, count); + } else { + fill_backwards(xptr, width - 1, count); + } + } +} + + +/////////////////////////////////////////////////////////////////////////////// +// The main entry point to the file, choosing between everything above. + +SkBitmapProcState::MatrixProc SkBitmapProcState::chooseMatrixProc(bool translate_only_matrix) { + SkASSERT(!fInvMatrix.hasPerspective()); + SkASSERT(fTileModeX != SkTileMode::kDecal); + + if( fTileModeX == fTileModeY ) { + // Check for our special case translate methods when there is no scale/affine/perspective. + if (translate_only_matrix && !fBilerp) { + switch (fTileModeX) { + default: SkASSERT(false); [[fallthrough]]; + case SkTileMode::kClamp: return clampx_nofilter_trans; + case SkTileMode::kRepeat: return repeatx_nofilter_trans; + case SkTileMode::kMirror: return mirrorx_nofilter_trans; + } + } + + // The arrays are all [ nofilter, filter ]. + int index = fBilerp ? 1 : 0; + if (!fInvMatrix.isScaleTranslate()) { + index |= 2; + } + + if (fTileModeX == SkTileMode::kClamp) { + // clamp gets special version of filterOne, working in non-normalized space (allowing decal) + fFilterOneX = SK_Fixed1; + fFilterOneY = SK_Fixed1; + return ClampX_ClampY_Procs[index]; + } + + // all remaining procs use this form for filterOne, putting them into normalized space. + fFilterOneX = SK_Fixed1 / fPixmap.width(); + fFilterOneY = SK_Fixed1 / fPixmap.height(); + + if (fTileModeX == SkTileMode::kRepeat) { + return RepeatX_RepeatY_Procs[index]; + } + return MirrorX_MirrorY_Procs[index]; + } + + SkASSERT(fTileModeX == fTileModeY); + return nullptr; +} + +uint32_t sktests::pack_clamp(SkFixed f, unsigned max) { + // Based on ClampX_ClampY_Procs[1] (filter_scale) + return ::pack(f, max, SK_Fixed1); +} + +uint32_t sktests::pack_repeat(SkFixed f, unsigned max, size_t width) { + // Based on RepeatX_RepeatY_Procs[1] (filter_scale) + return ::pack(f, max, SK_Fixed1 / width); +} + +uint32_t sktests::pack_mirror(SkFixed f, unsigned max, size_t width) { + // Based on MirrorX_MirrorY_Procs[1] (filter_scale) + return ::pack(f, max, SK_Fixed1 / width); +} diff --git a/gfx/skia/skia/src/core/SkBlendMode.cpp b/gfx/skia/skia/src/core/SkBlendMode.cpp new file mode 100644 index 0000000000..1d3bfd7bd1 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlendMode.cpp @@ -0,0 +1,157 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkBlendModePriv.h" + +#include "src/base/SkVx.h" +#include "src/core/SkRasterPipeline.h" + +bool SkBlendMode_ShouldPreScaleCoverage(SkBlendMode mode, bool rgb_coverage) { + // The most important things we do here are: + // 1) never pre-scale with rgb coverage if the blend mode involves a source-alpha term; + // 2) always pre-scale Plus. + // + // When we pre-scale with rgb coverage, we scale each of source r,g,b, with a distinct value, + // and source alpha with one of those three values. This process destructively updates the + // source-alpha term, so we can't evaluate blend modes that need its original value. + // + // Plus always requires pre-scaling as a specific quirk of its implementation in + // SkRasterPipeline. This lets us put the clamp inside the blend mode itself rather + // than as a separate stage that'd come after the lerp. + // + // This function is a finer-grained breakdown of SkBlendMode_SupportsCoverageAsAlpha(). + switch (mode) { + case SkBlendMode::kDst: // d --> no sa term, ok! + case SkBlendMode::kDstOver: // d + s*inv(da) --> no sa term, ok! + case SkBlendMode::kPlus: // clamp(s+d) --> no sa term, ok! + return true; + + case SkBlendMode::kDstOut: // d * inv(sa) + case SkBlendMode::kSrcATop: // s*da + d*inv(sa) + case SkBlendMode::kSrcOver: // s + d*inv(sa) + case SkBlendMode::kXor: // s*inv(da) + d*inv(sa) + return !rgb_coverage; + + default: break; + } + return false; +} + +// Users of this function may want to switch to the rgb-coverage aware version above. +bool SkBlendMode_SupportsCoverageAsAlpha(SkBlendMode mode) { + return SkBlendMode_ShouldPreScaleCoverage(mode, false); +} + +bool SkBlendMode_AsCoeff(SkBlendMode mode, SkBlendModeCoeff* src, SkBlendModeCoeff* dst) { + struct CoeffRec { + SkBlendModeCoeff fSrc; + SkBlendModeCoeff fDst; + }; + + static constexpr CoeffRec kCoeffs[] = { + // For Porter-Duff blend functions, color = src * src coeff + dst * dst coeff + // src coeff dst coeff blend func + // ---------------------- ----------------------- ---------- + { SkBlendModeCoeff::kZero, SkBlendModeCoeff::kZero }, // clear + { SkBlendModeCoeff::kOne, SkBlendModeCoeff::kZero }, // src + { SkBlendModeCoeff::kZero, SkBlendModeCoeff::kOne }, // dst + { SkBlendModeCoeff::kOne, SkBlendModeCoeff::kISA }, // src-over + { SkBlendModeCoeff::kIDA, SkBlendModeCoeff::kOne }, // dst-over + { SkBlendModeCoeff::kDA, SkBlendModeCoeff::kZero }, // src-in + { SkBlendModeCoeff::kZero, SkBlendModeCoeff::kSA }, // dst-in + { SkBlendModeCoeff::kIDA, SkBlendModeCoeff::kZero }, // src-out + { SkBlendModeCoeff::kZero, SkBlendModeCoeff::kISA }, // dst-out + { SkBlendModeCoeff::kDA, SkBlendModeCoeff::kISA }, // src-atop + { SkBlendModeCoeff::kIDA, SkBlendModeCoeff::kSA }, // dst-atop + { SkBlendModeCoeff::kIDA, SkBlendModeCoeff::kISA }, // xor + + { SkBlendModeCoeff::kOne, SkBlendModeCoeff::kOne }, // plus + { SkBlendModeCoeff::kZero, SkBlendModeCoeff::kSC }, // modulate + { SkBlendModeCoeff::kOne, SkBlendModeCoeff::kISC }, // screen + }; + + if (mode > SkBlendMode::kScreen) { + return false; + } + if (src) { + *src = kCoeffs[static_cast(mode)].fSrc; + } + if (dst) { + *dst = kCoeffs[static_cast(mode)].fDst; + } + return true; +} + +void SkBlendMode_AppendStages(SkBlendMode mode, SkRasterPipeline* p) { + auto stage = SkRasterPipelineOp::srcover; + switch (mode) { + case SkBlendMode::kClear: stage = SkRasterPipelineOp::clear; break; + case SkBlendMode::kSrc: return; // This stage is a no-op. + case SkBlendMode::kDst: stage = SkRasterPipelineOp::move_dst_src; break; + case SkBlendMode::kSrcOver: stage = SkRasterPipelineOp::srcover; break; + case SkBlendMode::kDstOver: stage = SkRasterPipelineOp::dstover; break; + case SkBlendMode::kSrcIn: stage = SkRasterPipelineOp::srcin; break; + case SkBlendMode::kDstIn: stage = SkRasterPipelineOp::dstin; break; + case SkBlendMode::kSrcOut: stage = SkRasterPipelineOp::srcout; break; + case SkBlendMode::kDstOut: stage = SkRasterPipelineOp::dstout; break; + case SkBlendMode::kSrcATop: stage = SkRasterPipelineOp::srcatop; break; + case SkBlendMode::kDstATop: stage = SkRasterPipelineOp::dstatop; break; + case SkBlendMode::kXor: stage = SkRasterPipelineOp::xor_; break; + case SkBlendMode::kPlus: stage = SkRasterPipelineOp::plus_; break; + case SkBlendMode::kModulate: stage = SkRasterPipelineOp::modulate; break; + + case SkBlendMode::kScreen: stage = SkRasterPipelineOp::screen; break; + case SkBlendMode::kOverlay: stage = SkRasterPipelineOp::overlay; break; + case SkBlendMode::kDarken: stage = SkRasterPipelineOp::darken; break; + case SkBlendMode::kLighten: stage = SkRasterPipelineOp::lighten; break; + case SkBlendMode::kColorDodge: stage = SkRasterPipelineOp::colordodge; break; + case SkBlendMode::kColorBurn: stage = SkRasterPipelineOp::colorburn; break; + case SkBlendMode::kHardLight: stage = SkRasterPipelineOp::hardlight; break; + case SkBlendMode::kSoftLight: stage = SkRasterPipelineOp::softlight; break; + case SkBlendMode::kDifference: stage = SkRasterPipelineOp::difference; break; + case SkBlendMode::kExclusion: stage = SkRasterPipelineOp::exclusion; break; + case SkBlendMode::kMultiply: stage = SkRasterPipelineOp::multiply; break; + + case SkBlendMode::kHue: stage = SkRasterPipelineOp::hue; break; + case SkBlendMode::kSaturation: stage = SkRasterPipelineOp::saturation; break; + case SkBlendMode::kColor: stage = SkRasterPipelineOp::color; break; + case SkBlendMode::kLuminosity: stage = SkRasterPipelineOp::luminosity; break; + } + p->append(stage); +} + +SkPMColor4f SkBlendMode_Apply(SkBlendMode mode, const SkPMColor4f& src, const SkPMColor4f& dst) { + // special-case simple/common modes... + switch (mode) { + case SkBlendMode::kClear: return SK_PMColor4fTRANSPARENT; + case SkBlendMode::kSrc: return src; + case SkBlendMode::kDst: return dst; + case SkBlendMode::kSrcOver: { + SkPMColor4f r; + (skvx::float4::Load(src.vec()) + skvx::float4::Load(dst.vec()) * (1-src.fA)).store(&r); + return r; + } + default: + break; + } + + SkRasterPipeline_<256> p; + SkPMColor4f src_storage = src, + dst_storage = dst, + res_storage; + SkRasterPipeline_MemoryCtx src_ctx = { &src_storage, 0 }, + dst_ctx = { &dst_storage, 0 }, + res_ctx = { &res_storage, 0 }; + + p.append(SkRasterPipelineOp::load_f32, &dst_ctx); + p.append(SkRasterPipelineOp::move_src_dst); + p.append(SkRasterPipelineOp::load_f32, &src_ctx); + SkBlendMode_AppendStages(mode, &p); + p.append(SkRasterPipelineOp::store_f32, &res_ctx); + p.run(0,0, 1,1); + return res_storage; +} diff --git a/gfx/skia/skia/src/core/SkBlendModeBlender.cpp b/gfx/skia/skia/src/core/SkBlendModeBlender.cpp new file mode 100644 index 0000000000..fab4359b0f --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlendModeBlender.cpp @@ -0,0 +1,118 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkBlendModeBlender.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkEffectPriv.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrBlendFragmentProcessor.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +sk_sp SkBlender::Mode(SkBlendMode mode) { +#define RETURN_SINGLETON_BLENDER(m) \ + case m: { \ + static auto* sBlender = new SkBlendModeBlender{m}; \ + return sk_ref_sp(sBlender); \ + } + + switch (mode) { + RETURN_SINGLETON_BLENDER(SkBlendMode::kClear) + RETURN_SINGLETON_BLENDER(SkBlendMode::kSrc) + RETURN_SINGLETON_BLENDER(SkBlendMode::kDst) + RETURN_SINGLETON_BLENDER(SkBlendMode::kSrcOver) + RETURN_SINGLETON_BLENDER(SkBlendMode::kDstOver) + RETURN_SINGLETON_BLENDER(SkBlendMode::kSrcIn) + RETURN_SINGLETON_BLENDER(SkBlendMode::kDstIn) + RETURN_SINGLETON_BLENDER(SkBlendMode::kSrcOut) + RETURN_SINGLETON_BLENDER(SkBlendMode::kDstOut) + RETURN_SINGLETON_BLENDER(SkBlendMode::kSrcATop) + RETURN_SINGLETON_BLENDER(SkBlendMode::kDstATop) + RETURN_SINGLETON_BLENDER(SkBlendMode::kXor) + RETURN_SINGLETON_BLENDER(SkBlendMode::kPlus) + RETURN_SINGLETON_BLENDER(SkBlendMode::kModulate) + RETURN_SINGLETON_BLENDER(SkBlendMode::kScreen) + RETURN_SINGLETON_BLENDER(SkBlendMode::kOverlay) + RETURN_SINGLETON_BLENDER(SkBlendMode::kDarken) + RETURN_SINGLETON_BLENDER(SkBlendMode::kLighten) + RETURN_SINGLETON_BLENDER(SkBlendMode::kColorDodge) + RETURN_SINGLETON_BLENDER(SkBlendMode::kColorBurn) + RETURN_SINGLETON_BLENDER(SkBlendMode::kHardLight) + RETURN_SINGLETON_BLENDER(SkBlendMode::kSoftLight) + RETURN_SINGLETON_BLENDER(SkBlendMode::kDifference) + RETURN_SINGLETON_BLENDER(SkBlendMode::kExclusion) + RETURN_SINGLETON_BLENDER(SkBlendMode::kMultiply) + RETURN_SINGLETON_BLENDER(SkBlendMode::kHue) + RETURN_SINGLETON_BLENDER(SkBlendMode::kSaturation) + RETURN_SINGLETON_BLENDER(SkBlendMode::kColor) + RETURN_SINGLETON_BLENDER(SkBlendMode::kLuminosity) + } + + SkDEBUGFAILF("invalid blend mode %d", (int)mode); + return nullptr; + +#undef RETURN_SINGLETON_BLENDER +} + +#if defined(SK_GRAPHITE) +void SkBlenderBase::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer, + skgpu::graphite::DstColorType dstColorType) const { + using namespace skgpu::graphite; + SkASSERT(dstColorType == DstColorType::kSurface || dstColorType == DstColorType::kPrimitive); + + const bool primitiveColorBlender = dstColorType == DstColorType::kPrimitive; + std::optional bm = as_BB(this)->asBlendMode(); + if (primitiveColorBlender && bm.has_value()) { + PrimitiveBlendModeBlock::BeginBlock(keyContext, builder, gatherer, bm.value()); + builder->endBlock(); + } else if (!primitiveColorBlender) { + BlendModeBlock::BeginBlock(keyContext, builder, gatherer, + bm.value_or(SkBlendMode::kSrcOver)); + builder->endBlock(); + } +} +#endif + +sk_sp SkBlendModeBlender::CreateProc(SkReadBuffer& buffer) { + SkBlendMode mode = buffer.read32LE(SkBlendMode::kLastMode); + return SkBlender::Mode(mode); +} + +void SkBlendModeBlender::flatten(SkWriteBuffer& buffer) const { + buffer.writeInt((int)fMode); +} + +#if defined(SK_GANESH) +std::unique_ptr SkBlendModeBlender::asFragmentProcessor( + std::unique_ptr srcFP, + std::unique_ptr dstFP, + const GrFPArgs& fpArgs) const { + return GrBlendFragmentProcessor::Make(std::move(srcFP), std::move(dstFP), fMode); +} +#endif + +bool SkBlendModeBlender::onAppendStages(const SkStageRec& rec) const { + SkBlendMode_AppendStages(fMode, rec.fPipeline); + return true; +} + +skvm::Color SkBlendModeBlender::onProgram(skvm::Builder* p, skvm::Color src, skvm::Color dst, + const SkColorInfo& colorInfo, skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + return p->blend(fMode, src, dst); +} diff --git a/gfx/skia/skia/src/core/SkBlendModeBlender.h b/gfx/skia/skia/src/core/SkBlendModeBlender.h new file mode 100644 index 0000000000..5e0ab291e0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlendModeBlender.h @@ -0,0 +1,42 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlendModeBlender_DEFINED +#define SkBlendModeBlender_DEFINED + +#include "src/core/SkBlenderBase.h" + +class SkBlendModeBlender : public SkBlenderBase { +public: + SkBlendModeBlender(SkBlendMode mode) : fMode(mode) {} + + SK_FLATTENABLE_HOOKS(SkBlendModeBlender) + +private: + using INHERITED = SkBlenderBase; + + std::optional asBlendMode() const final { return fMode; } + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor( + std::unique_ptr srcFP, + std::unique_ptr dstFP, + const GrFPArgs& fpArgs) const override; +#endif + + void flatten(SkWriteBuffer& buffer) const override; + + bool onAppendStages(const SkStageRec& rec) const override; + + skvm::Color onProgram(skvm::Builder* p, skvm::Color src, skvm::Color dst, + const SkColorInfo& colorInfo, skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override; + + SkBlendMode fMode; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkBlendModePriv.h b/gfx/skia/skia/src/core/SkBlendModePriv.h new file mode 100644 index 0000000000..1b1a592e36 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlendModePriv.h @@ -0,0 +1,40 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlendModePriv_DEFINED +#define SkBlendModePriv_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/private/SkColorData.h" + +class SkRasterPipeline; + +/** + * Sentinel value for SkBlendMode enum. + * + * Will never be a valid enum value, but will be storable in a byte. + */ +constexpr uint8_t kCustom_SkBlendMode = 0xFF; + +bool SkBlendMode_SupportsCoverageAsAlpha(SkBlendMode); + +static inline bool SkBlendMode_CaresAboutRBOrder(SkBlendMode mode) { + return (mode > SkBlendMode::kLastSeparableMode); +} + +bool SkBlendMode_ShouldPreScaleCoverage(SkBlendMode, bool rgb_coverage); +void SkBlendMode_AppendStages(SkBlendMode, SkRasterPipeline*); + +SkPMColor4f SkBlendMode_Apply(SkBlendMode, const SkPMColor4f& src, const SkPMColor4f& dst); + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrXferProcessor.h" +const GrXPFactory* SkBlendMode_AsXPFactory(SkBlendMode); +#endif + +#endif diff --git a/gfx/skia/skia/src/core/SkBlenderBase.h b/gfx/skia/skia/src/core/SkBlenderBase.h new file mode 100644 index 0000000000..5456be9973 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlenderBase.h @@ -0,0 +1,107 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlenderBase_DEFINED +#define SkBlenderBase_DEFINED + +#include "include/core/SkBlender.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkVM.h" + +#include + +struct GrFPArgs; +class GrFragmentProcessor; +class SkColorInfo; +class SkRuntimeEffect; +struct SkStageRec; + +namespace skgpu::graphite { +enum class DstColorType; +class KeyContext; +class PaintParamsKeyBuilder; +class PipelineDataGatherer; +} + +/** + * Encapsulates a blend function, including non-public APIs. + * Blends combine a source color (the result of our paint) and destination color (from the canvas) + * into a final color. + */ +class SkBlenderBase : public SkBlender { +public: + /** + * Returns true if this SkBlender represents any SkBlendMode, and returns the blender's + * SkBlendMode in `mode`. Returns false for other types of blends. + */ + virtual std::optional asBlendMode() const { return {}; } + + SK_WARN_UNUSED_RESULT bool appendStages(const SkStageRec& rec) const { + return this->onAppendStages(rec); + } + + SK_WARN_UNUSED_RESULT + virtual bool onAppendStages(const SkStageRec& rec) const = 0; + + /** Creates the blend program in SkVM. */ + SK_WARN_UNUSED_RESULT + skvm::Color program(skvm::Builder* p, skvm::Color src, skvm::Color dst, + const SkColorInfo& colorInfo, skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + return this->onProgram(p, src, dst, colorInfo, uniforms, alloc); + } + +#if defined(SK_GANESH) + /** + * Returns a GrFragmentProcessor that implements this blend for the GPU backend. + * The GrFragmentProcessor expects premultiplied inputs and returns a premultiplied output. + */ + virtual std::unique_ptr asFragmentProcessor( + std::unique_ptr srcFP, + std::unique_ptr dstFP, + const GrFPArgs& fpArgs) const = 0; +#endif + + virtual SkRuntimeEffect* asRuntimeEffect() const { return nullptr; } + +#if defined(SK_GRAPHITE) + /** + * TODO: Make pure virtual. + * dstColorType = kPrimitive when blending the result of the paint evaluation with a primitive + * color (which is supplied by certain geometries). dstColorType = kSurface when blending the + * result of the paint evaluation with the back buffer. + */ + virtual void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*, + skgpu::graphite::DstColorType dstColorType) const; +#endif + + static SkFlattenable::Type GetFlattenableType() { return kSkBlender_Type; } + Type getFlattenableType() const override { return GetFlattenableType(); } + +private: + virtual skvm::Color onProgram(skvm::Builder* p, skvm::Color src, skvm::Color dst, + const SkColorInfo& colorInfo, skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const = 0; + + using INHERITED = SkFlattenable; +}; + +inline SkBlenderBase* as_BB(SkBlender* blend) { + return static_cast(blend); +} + +inline const SkBlenderBase* as_BB(const SkBlender* blend) { + return static_cast(blend); +} + +inline const SkBlenderBase* as_BB(const sk_sp& blend) { + return static_cast(blend.get()); +} + +#endif // SkBlenderBase_DEFINED diff --git a/gfx/skia/skia/src/core/SkBlitBWMaskTemplate.h b/gfx/skia/skia/src/core/SkBlitBWMaskTemplate.h new file mode 100644 index 0000000000..7f0203671f --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitBWMaskTemplate.h @@ -0,0 +1,127 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#include "include/core/SkBitmap.h" +#include "src/core/SkMask.h" + +#ifndef ClearLow3Bits_DEFINED +#define ClearLow3Bits_DEFINED + #define ClearLow3Bits(x) ((unsigned)(x) >> 3 << 3) +#endif + +/* + SK_BLITBWMASK_NAME name of function(const SkBitmap& bitmap, const SkMask& mask, const SkIRect& clip, SK_BLITBWMASK_ARGS) + SK_BLITBWMASK_ARGS list of additional arguments to SK_BLITBWMASK_NAME, beginning with a comma + SK_BLITBWMASK_BLIT8 name of function(U8CPU byteMask, SK_BLITBWMASK_DEVTYPE* dst, int x, int y) + SK_BLITBWMASK_GETADDR either writable_addr[8,16,32] + SK_BLITBWMASK_DEVTYPE either U32 or U16 or U8 +*/ + +static void SK_BLITBWMASK_NAME(const SkPixmap& dstPixmap, const SkMask& srcMask, + const SkIRect& clip SK_BLITBWMASK_ARGS) { + SkASSERT(clip.fRight <= srcMask.fBounds.fRight); + + int cx = clip.fLeft; + int cy = clip.fTop; + int maskLeft = srcMask.fBounds.fLeft; + unsigned mask_rowBytes = srcMask.fRowBytes; + size_t bitmap_rowBytes = dstPixmap.rowBytes(); + unsigned height = clip.height(); + + SkASSERT(mask_rowBytes != 0); + SkASSERT(bitmap_rowBytes != 0); + SkASSERT(height != 0); + + const uint8_t* bits = srcMask.getAddr1(cx, cy); + SK_BLITBWMASK_DEVTYPE* device = dstPixmap.SK_BLITBWMASK_GETADDR(cx, cy); + + if (cx == maskLeft && clip.fRight == srcMask.fBounds.fRight) + { + do { + SK_BLITBWMASK_DEVTYPE* dst = device; + unsigned rb = mask_rowBytes; + do { + U8CPU mask = *bits++; + SK_BLITBWMASK_BLIT8(mask, dst); + dst += 8; + } while (--rb != 0); + device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); + } while (--height != 0); + } + else + { + int left_edge = cx - maskLeft; + SkASSERT(left_edge >= 0); + int rite_edge = clip.fRight - maskLeft; + SkASSERT(rite_edge > left_edge); + + int left_mask = 0xFF >> (left_edge & 7); + int rite_mask = 0xFF << (8 - (rite_edge & 7)); + rite_mask &= 0xFF; // only want low-8 bits of mask + int full_runs = (rite_edge >> 3) - ((left_edge + 7) >> 3); + + // check for empty right mask, so we don't read off the end (or go slower than we need to) + if (rite_mask == 0) + { + SkASSERT(full_runs >= 0); + full_runs -= 1; + rite_mask = 0xFF; + } + if (left_mask == 0xFF) + full_runs -= 1; + + // back up manually so we can keep in sync with our byte-aligned src + // and not trigger an assert from the getAddr## function + device -= left_edge & 7; + + if (full_runs < 0) + { + left_mask &= rite_mask; + SkASSERT(left_mask != 0); + do { + U8CPU mask = *bits & left_mask; + SK_BLITBWMASK_BLIT8(mask, device); + bits += mask_rowBytes; + device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); + } while (--height != 0); + } + else + { + do { + int runs = full_runs; + SK_BLITBWMASK_DEVTYPE* dst = device; + const uint8_t* b = bits; + U8CPU mask; + + mask = *b++ & left_mask; + SK_BLITBWMASK_BLIT8(mask, dst); + dst += 8; + + while (--runs >= 0) + { + mask = *b++; + SK_BLITBWMASK_BLIT8(mask, dst); + dst += 8; + } + + mask = *b & rite_mask; + SK_BLITBWMASK_BLIT8(mask, dst); + + bits += mask_rowBytes; + device = (SK_BLITBWMASK_DEVTYPE*)((char*)device + bitmap_rowBytes); + } while (--height != 0); + } + } +} + +#undef SK_BLITBWMASK_NAME +#undef SK_BLITBWMASK_ARGS +#undef SK_BLITBWMASK_BLIT8 +#undef SK_BLITBWMASK_GETADDR +#undef SK_BLITBWMASK_DEVTYPE +#undef SK_BLITBWMASK_DOROWSETUP diff --git a/gfx/skia/skia/src/core/SkBlitRow.h b/gfx/skia/skia/src/core/SkBlitRow.h new file mode 100644 index 0000000000..cc4ba86407 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitRow.h @@ -0,0 +1,38 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlitRow_DEFINED +#define SkBlitRow_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkColor.h" + +class SkBlitRow { +public: + enum Flags32 { + kGlobalAlpha_Flag32 = 1 << 0, + kSrcPixelAlpha_Flag32 = 1 << 1 + }; + + /** Function pointer that blends 32bit colors onto a 32bit destination. + @param dst array of dst 32bit colors + @param src array of src 32bit colors (w/ or w/o alpha) + @param count number of colors to blend + @param alpha global alpha to be applied to all src colors + */ + typedef void (*Proc32)(uint32_t dst[], const SkPMColor src[], int count, U8CPU alpha); + + static Proc32 Factory32(unsigned flags32); + + /** Blend a single color onto a row of S32 pixels, writing the result + into a row of D32 pixels. src and dst may be the same memory, but + if they are not, they may not overlap. + */ + static void Color32(SkPMColor dst[], const SkPMColor src[], int count, SkPMColor color); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkBlitRow_D32.cpp b/gfx/skia/skia/src/core/SkBlitRow_D32.cpp new file mode 100644 index 0000000000..6959979c22 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitRow_D32.cpp @@ -0,0 +1,313 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkColorData.h" +#include "src/core/SkBlitRow.h" +#include "src/core/SkOpts.h" + +// Everyone agrees memcpy() is the best way to do this. +static void blit_row_s32_opaque(SkPMColor* dst, + const SkPMColor* src, + int count, + U8CPU alpha) { + SkASSERT(255 == alpha); + memcpy(dst, src, count * sizeof(SkPMColor)); +} + +// We have SSE2, NEON, and portable implementations of +// blit_row_s32_blend() and blit_row_s32a_blend(). + +// TODO(mtklein): can we do better in NEON than 2 pixels at a time? + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #include + + static inline __m128i SkPMLerp_SSE2(const __m128i& src, + const __m128i& dst, + const unsigned src_scale) { + // Computes dst + (((src - dst)*src_scale)>>8) + const __m128i mask = _mm_set1_epi32(0x00FF00FF); + + // Unpack the 16x8-bit source into 2 8x16-bit splayed halves. + __m128i src_rb = _mm_and_si128(mask, src); + __m128i src_ag = _mm_srli_epi16(src, 8); + __m128i dst_rb = _mm_and_si128(mask, dst); + __m128i dst_ag = _mm_srli_epi16(dst, 8); + + // Compute scaled differences. + __m128i diff_rb = _mm_sub_epi16(src_rb, dst_rb); + __m128i diff_ag = _mm_sub_epi16(src_ag, dst_ag); + __m128i s = _mm_set1_epi16(src_scale); + diff_rb = _mm_mullo_epi16(diff_rb, s); + diff_ag = _mm_mullo_epi16(diff_ag, s); + + // Pack the differences back together. + diff_rb = _mm_srli_epi16(diff_rb, 8); + diff_ag = _mm_andnot_si128(mask, diff_ag); + __m128i diff = _mm_or_si128(diff_rb, diff_ag); + + // Add difference to destination. + return _mm_add_epi8(dst, diff); + } + + + static void blit_row_s32_blend(SkPMColor* dst, const SkPMColor* src, int count, U8CPU alpha) { + SkASSERT(alpha <= 255); + + auto src4 = (const __m128i*)src; + auto dst4 = ( __m128i*)dst; + + while (count >= 4) { + _mm_storeu_si128(dst4, SkPMLerp_SSE2(_mm_loadu_si128(src4), + _mm_loadu_si128(dst4), + SkAlpha255To256(alpha))); + src4++; + dst4++; + count -= 4; + } + + src = (const SkPMColor*)src4; + dst = ( SkPMColor*)dst4; + + while (count --> 0) { + *dst = SkPMLerp(*src, *dst, SkAlpha255To256(alpha)); + src++; + dst++; + } + } + + static inline __m128i SkBlendARGB32_SSE2(const __m128i& src, + const __m128i& dst, + const unsigned aa) { + unsigned alpha = SkAlpha255To256(aa); + __m128i src_scale = _mm_set1_epi16(alpha); + // SkAlphaMulInv256(SkGetPackedA32(src), src_scale) + __m128i dst_scale = _mm_srli_epi32(src, 24); + // High words in dst_scale are 0, so it's safe to multiply with 16-bit src_scale. + dst_scale = _mm_mullo_epi16(dst_scale, src_scale); + dst_scale = _mm_sub_epi32(_mm_set1_epi32(0xFFFF), dst_scale); + dst_scale = _mm_add_epi32(dst_scale, _mm_srli_epi32(dst_scale, 8)); + dst_scale = _mm_srli_epi32(dst_scale, 8); + // Duplicate scales into 2x16-bit pattern per pixel. + dst_scale = _mm_shufflelo_epi16(dst_scale, _MM_SHUFFLE(2, 2, 0, 0)); + dst_scale = _mm_shufflehi_epi16(dst_scale, _MM_SHUFFLE(2, 2, 0, 0)); + + const __m128i mask = _mm_set1_epi32(0x00FF00FF); + + // Unpack the 16x8-bit source/destination into 2 8x16-bit splayed halves. + __m128i src_rb = _mm_and_si128(mask, src); + __m128i src_ag = _mm_srli_epi16(src, 8); + __m128i dst_rb = _mm_and_si128(mask, dst); + __m128i dst_ag = _mm_srli_epi16(dst, 8); + + // Scale them. + src_rb = _mm_mullo_epi16(src_rb, src_scale); + src_ag = _mm_mullo_epi16(src_ag, src_scale); + dst_rb = _mm_mullo_epi16(dst_rb, dst_scale); + dst_ag = _mm_mullo_epi16(dst_ag, dst_scale); + + // Add the scaled source and destination. + dst_rb = _mm_add_epi16(src_rb, dst_rb); + dst_ag = _mm_add_epi16(src_ag, dst_ag); + + // Unsplay the halves back together. + dst_rb = _mm_srli_epi16(dst_rb, 8); + dst_ag = _mm_andnot_si128(mask, dst_ag); + return _mm_or_si128(dst_rb, dst_ag); + } + + static void blit_row_s32a_blend(SkPMColor* dst, const SkPMColor* src, int count, U8CPU alpha) { + SkASSERT(alpha <= 255); + + auto src4 = (const __m128i*)src; + auto dst4 = ( __m128i*)dst; + + while (count >= 4) { + _mm_storeu_si128(dst4, SkBlendARGB32_SSE2(_mm_loadu_si128(src4), + _mm_loadu_si128(dst4), + alpha)); + src4++; + dst4++; + count -= 4; + } + + src = (const SkPMColor*)src4; + dst = ( SkPMColor*)dst4; + + while (count --> 0) { + *dst = SkBlendARGB32(*src, *dst, alpha); + src++; + dst++; + } + } + +#elif defined(SK_ARM_HAS_NEON) + #include + + static void blit_row_s32_blend(SkPMColor* dst, const SkPMColor* src, int count, U8CPU alpha) { + SkASSERT(alpha <= 255); + + uint16_t src_scale = SkAlpha255To256(alpha); + uint16_t dst_scale = 256 - src_scale; + + while (count >= 2) { + uint8x8_t vsrc, vdst, vres; + uint16x8_t vsrc_wide, vdst_wide; + + vsrc = vreinterpret_u8_u32(vld1_u32(src)); + vdst = vreinterpret_u8_u32(vld1_u32(dst)); + + vsrc_wide = vmovl_u8(vsrc); + vsrc_wide = vmulq_u16(vsrc_wide, vdupq_n_u16(src_scale)); + + vdst_wide = vmull_u8(vdst, vdup_n_u8(dst_scale)); + + vdst_wide += vsrc_wide; + vres = vshrn_n_u16(vdst_wide, 8); + + vst1_u32(dst, vreinterpret_u32_u8(vres)); + + src += 2; + dst += 2; + count -= 2; + } + + if (count == 1) { + uint8x8_t vsrc = vdup_n_u8(0), vdst = vdup_n_u8(0), vres; + uint16x8_t vsrc_wide, vdst_wide; + + vsrc = vreinterpret_u8_u32(vld1_lane_u32(src, vreinterpret_u32_u8(vsrc), 0)); + vdst = vreinterpret_u8_u32(vld1_lane_u32(dst, vreinterpret_u32_u8(vdst), 0)); + + vsrc_wide = vmovl_u8(vsrc); + vsrc_wide = vmulq_u16(vsrc_wide, vdupq_n_u16(src_scale)); + vdst_wide = vmull_u8(vdst, vdup_n_u8(dst_scale)); + vdst_wide += vsrc_wide; + vres = vshrn_n_u16(vdst_wide, 8); + + vst1_lane_u32(dst, vreinterpret_u32_u8(vres), 0); + } + } + + static void blit_row_s32a_blend(SkPMColor* dst, const SkPMColor* src, int count, U8CPU alpha) { + SkASSERT(alpha < 255); + + unsigned alpha256 = SkAlpha255To256(alpha); + + if (count & 1) { + uint8x8_t vsrc = vdup_n_u8(0), vdst = vdup_n_u8(0), vres; + uint16x8_t vdst_wide, vsrc_wide; + unsigned dst_scale; + + vsrc = vreinterpret_u8_u32(vld1_lane_u32(src, vreinterpret_u32_u8(vsrc), 0)); + vdst = vreinterpret_u8_u32(vld1_lane_u32(dst, vreinterpret_u32_u8(vdst), 0)); + + dst_scale = vget_lane_u8(vsrc, 3); + dst_scale = SkAlphaMulInv256(dst_scale, alpha256); + + vsrc_wide = vmovl_u8(vsrc); + vsrc_wide = vmulq_n_u16(vsrc_wide, alpha256); + + vdst_wide = vmovl_u8(vdst); + vdst_wide = vmulq_n_u16(vdst_wide, dst_scale); + + vdst_wide += vsrc_wide; + vres = vshrn_n_u16(vdst_wide, 8); + + vst1_lane_u32(dst, vreinterpret_u32_u8(vres), 0); + dst++; + src++; + count--; + } + + uint8x8_t alpha_mask; + static const uint8_t alpha_mask_setup[] = {3,3,3,3,7,7,7,7}; + alpha_mask = vld1_u8(alpha_mask_setup); + + while (count) { + + uint8x8_t vsrc, vdst, vres, vsrc_alphas; + uint16x8_t vdst_wide, vsrc_wide, vsrc_scale, vdst_scale; + + __builtin_prefetch(src+32); + __builtin_prefetch(dst+32); + + vsrc = vreinterpret_u8_u32(vld1_u32(src)); + vdst = vreinterpret_u8_u32(vld1_u32(dst)); + + vsrc_scale = vdupq_n_u16(alpha256); + + vsrc_alphas = vtbl1_u8(vsrc, alpha_mask); + vdst_scale = vmovl_u8(vsrc_alphas); + // Calculate SkAlphaMulInv256(vdst_scale, vsrc_scale). + // A 16-bit lane would overflow if we used 0xFFFF here, + // so use an approximation with 0xFF00 that is off by 1, + // and add back 1 after to get the correct value. + // This is valid if alpha256 <= 255. + vdst_scale = vmlsq_u16(vdupq_n_u16(0xFF00), vdst_scale, vsrc_scale); + vdst_scale = vsraq_n_u16(vdst_scale, vdst_scale, 8); + vdst_scale = vsraq_n_u16(vdupq_n_u16(1), vdst_scale, 8); + + vsrc_wide = vmovl_u8(vsrc); + vsrc_wide *= vsrc_scale; + + vdst_wide = vmovl_u8(vdst); + vdst_wide *= vdst_scale; + + vdst_wide += vsrc_wide; + vres = vshrn_n_u16(vdst_wide, 8); + + vst1_u32(dst, vreinterpret_u32_u8(vres)); + + src += 2; + dst += 2; + count -= 2; + } + } + +#else + static void blit_row_s32_blend(SkPMColor* dst, const SkPMColor* src, int count, U8CPU alpha) { + SkASSERT(alpha <= 255); + while (count --> 0) { + *dst = SkPMLerp(*src, *dst, SkAlpha255To256(alpha)); + src++; + dst++; + } + } + + static void blit_row_s32a_blend(SkPMColor* dst, const SkPMColor* src, int count, U8CPU alpha) { + SkASSERT(alpha <= 255); + while (count --> 0) { + *dst = SkBlendARGB32(*src, *dst, alpha); + src++; + dst++; + } + } +#endif + +SkBlitRow::Proc32 SkBlitRow::Factory32(unsigned flags) { + static const SkBlitRow::Proc32 kProcs[] = { + blit_row_s32_opaque, + blit_row_s32_blend, + nullptr, // blit_row_s32a_opaque is in SkOpts + blit_row_s32a_blend + }; + + SkASSERT(flags < std::size(kProcs)); + flags &= std::size(kProcs) - 1; // just to be safe + + return flags == 2 ? SkOpts::blit_row_s32a_opaque + : kProcs[flags]; +} + +void SkBlitRow::Color32(SkPMColor dst[], const SkPMColor src[], int count, SkPMColor color) { + switch (SkGetPackedA32(color)) { + case 0: memmove(dst, src, count * sizeof(SkPMColor)); return; + case 255: SkOpts::memset32(dst, color, count); return; + } + return SkOpts::blit_row_color32(dst, src, count, color); +} diff --git a/gfx/skia/skia/src/core/SkBlitter.cpp b/gfx/skia/skia/src/core/SkBlitter.cpp new file mode 100644 index 0000000000..e09886fcc9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitter.cpp @@ -0,0 +1,898 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkBlitter.h" + +#include "include/core/SkColor.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkString.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkAntiRun.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkOpts.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRegionPriv.h" +#include "src/core/SkVMBlitter.h" +#include "src/core/SkWriteBuffer.h" +#include "src/core/SkXfermodeInterpretation.h" +#include "src/shaders/SkShaderBase.h" + +using namespace skia_private; + +// Hacks for testing. +bool gUseSkVMBlitter{false}; +bool gSkForceRasterPipelineBlitter{false}; + +SkBlitter::~SkBlitter() {} + +bool SkBlitter::isNullBlitter() const { return false; } + +const SkPixmap* SkBlitter::justAnOpaqueColor(uint32_t* value) { + return nullptr; +} + +/* +void SkBlitter::blitH(int x, int y, int width) { + SkDEBUGFAIL("unimplemented"); +} + + +void SkBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], + const int16_t runs[]) { + SkDEBUGFAIL("unimplemented"); +} + */ + +inline static SkAlpha ScalarToAlpha(SkScalar a) { + SkAlpha alpha = (SkAlpha)(a * 255); + return alpha > 247 ? 0xFF : alpha < 8 ? 0 : alpha; +} + +void SkBlitter::blitFatAntiRect(const SkRect& rect) { + SkIRect bounds = rect.roundOut(); + SkASSERT(bounds.width() >= 3); + + // skbug.com/7813 + // To ensure consistency of the threaded backend (a rect that's considered fat in the init-once + // phase must also be considered fat in the draw phase), we have to deal with rects with small + // heights because the horizontal tiling in the threaded backend may change the height. + // + // This also implies that we cannot do vertical tiling unless we can blit any rect (not just the + // fat one.) + if (bounds.height() == 0) { + return; + } + + int runSize = bounds.width() + 1; // +1 so we can set runs[bounds.width()] = 0 + void* storage = this->allocBlitMemory(runSize * (sizeof(int16_t) + sizeof(SkAlpha))); + int16_t* runs = reinterpret_cast(storage); + SkAlpha* alphas = reinterpret_cast(runs + runSize); + + runs[0] = 1; + runs[1] = bounds.width() - 2; + runs[bounds.width() - 1] = 1; + runs[bounds.width()] = 0; + + SkScalar partialL = bounds.fLeft + 1 - rect.fLeft; + SkScalar partialR = rect.fRight - (bounds.fRight - 1); + SkScalar partialT = bounds.fTop + 1 - rect.fTop; + SkScalar partialB = rect.fBottom - (bounds.fBottom - 1); + + if (bounds.height() == 1) { + partialT = rect.fBottom - rect.fTop; + } + + alphas[0] = ScalarToAlpha(partialL * partialT); + alphas[1] = ScalarToAlpha(partialT); + alphas[bounds.width() - 1] = ScalarToAlpha(partialR * partialT); + this->blitAntiH(bounds.fLeft, bounds.fTop, alphas, runs); + + if (bounds.height() > 2) { + this->blitAntiRect(bounds.fLeft, bounds.fTop + 1, bounds.width() - 2, bounds.height() - 2, + ScalarToAlpha(partialL), ScalarToAlpha(partialR)); + } + + if (bounds.height() > 1) { + alphas[0] = ScalarToAlpha(partialL * partialB); + alphas[1] = ScalarToAlpha(partialB); + alphas[bounds.width() - 1] = ScalarToAlpha(partialR * partialB); + this->blitAntiH(bounds.fLeft, bounds.fBottom - 1, alphas, runs); + } +} + +void SkBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + if (alpha == 255) { + this->blitRect(x, y, 1, height); + } else { + int16_t runs[2]; + runs[0] = 1; + runs[1] = 0; + + while (--height >= 0) { + this->blitAntiH(x, y++, &alpha, runs); + } + } +} + +void SkBlitter::blitRect(int x, int y, int width, int height) { + SkASSERT(width > 0); + while (--height >= 0) { + this->blitH(x, y++, width); + } +} + +/// Default implementation doesn't check for easy optimizations +/// such as alpha == 255; also uses blitV(), which some subclasses +/// may not support. +void SkBlitter::blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) { + if (leftAlpha > 0) { // we may send in x = -1 with leftAlpha = 0 + this->blitV(x, y, height, leftAlpha); + } + x++; + if (width > 0) { + this->blitRect(x, y, width, height); + x += width; + } + if (rightAlpha > 0) { + this->blitV(x, y, height, rightAlpha); + } +} + +////////////////////////////////////////////////////////////////////////////// + +static inline void bits_to_runs(SkBlitter* blitter, int x, int y, + const uint8_t bits[], + uint8_t left_mask, ptrdiff_t rowBytes, + uint8_t right_mask) { + int inFill = 0; + int pos = 0; + + while (--rowBytes >= 0) { + uint8_t b = *bits++ & left_mask; + if (rowBytes == 0) { + b &= right_mask; + } + + for (uint8_t test = 0x80U; test != 0; test >>= 1) { + if (b & test) { + if (!inFill) { + pos = x; + inFill = true; + } + } else { + if (inFill) { + blitter->blitH(pos, y, x - pos); + inFill = false; + } + } + x += 1; + } + left_mask = 0xFFU; + } + + // final cleanup + if (inFill) { + blitter->blitH(pos, y, x - pos); + } +} + +// maskBitCount is the number of 1's to place in the mask. It must be in the range between 1 and 8. +static uint8_t generate_right_mask(int maskBitCount) { + return static_cast((0xFF00U >> maskBitCount) & 0xFF); +} + +void SkBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { + SkASSERT(mask.fBounds.contains(clip)); + + if (mask.fFormat == SkMask::kLCD16_Format) { + return; // needs to be handled by subclass + } + + if (mask.fFormat == SkMask::kBW_Format) { + int cx = clip.fLeft; + int cy = clip.fTop; + int maskLeft = mask.fBounds.fLeft; + int maskRowBytes = mask.fRowBytes; + int height = clip.height(); + + const uint8_t* bits = mask.getAddr1(cx, cy); + + SkDEBUGCODE(const uint8_t* endOfImage = + mask.fImage + (mask.fBounds.height() - 1) * maskRowBytes + + ((mask.fBounds.width() + 7) >> 3)); + + if (cx == maskLeft && clip.fRight == mask.fBounds.fRight) { + while (--height >= 0) { + int affectedRightBit = mask.fBounds.width() - 1; + ptrdiff_t rowBytes = (affectedRightBit >> 3) + 1; + SkASSERT(bits + rowBytes <= endOfImage); + U8CPU rightMask = generate_right_mask((affectedRightBit & 7) + 1); + bits_to_runs(this, cx, cy, bits, 0xFF, rowBytes, rightMask); + bits += maskRowBytes; + cy += 1; + } + } else { + // Bits is calculated as the offset into the mask at the point {cx, cy} therefore, all + // addressing into the bit mask is relative to that point. Since this is an address + // calculated from a arbitrary bit in that byte, calculate the left most bit. + int bitsLeft = cx - ((cx - maskLeft) & 7); + + // Everything is relative to the bitsLeft. + int leftEdge = cx - bitsLeft; + SkASSERT(leftEdge >= 0); + int rightEdge = clip.fRight - bitsLeft; + SkASSERT(rightEdge > leftEdge); + + // Calculate left byte and mask + const uint8_t* leftByte = bits; + U8CPU leftMask = 0xFFU >> (leftEdge & 7); + + // Calculate right byte and mask + int affectedRightBit = rightEdge - 1; + const uint8_t* rightByte = bits + (affectedRightBit >> 3); + U8CPU rightMask = generate_right_mask((affectedRightBit & 7) + 1); + + // leftByte and rightByte are byte locations therefore, to get a count of bytes the + // code must add one. + ptrdiff_t rowBytes = rightByte - leftByte + 1; + + while (--height >= 0) { + SkASSERT(bits + rowBytes <= endOfImage); + bits_to_runs(this, bitsLeft, cy, bits, leftMask, rowBytes, rightMask); + bits += maskRowBytes; + cy += 1; + } + } + } else { + int width = clip.width(); + AutoSTMalloc<64, int16_t> runStorage(width + 1); + int16_t* runs = runStorage.get(); + const uint8_t* aa = mask.getAddr8(clip.fLeft, clip.fTop); + + SkOpts::memset16((uint16_t*)runs, 1, width); + runs[width] = 0; + + int height = clip.height(); + int y = clip.fTop; + while (--height >= 0) { + this->blitAntiH(clip.fLeft, y, aa, runs); + aa += mask.fRowBytes; + y += 1; + } + } +} + +/////////////////////// these are not virtual, just helpers + +#if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) +void SkBlitter::blitMaskRegion(const SkMask& mask, const SkRegion& clip) { + if (clip.quickReject(mask.fBounds)) { + return; + } + + SkRegion::Cliperator clipper(clip, mask.fBounds); + + while (!clipper.done()) { + const SkIRect& cr = clipper.rect(); + this->blitMask(mask, cr); + clipper.next(); + } +} +#endif + +void SkBlitter::blitRectRegion(const SkIRect& rect, const SkRegion& clip) { + SkRegion::Cliperator clipper(clip, rect); + + while (!clipper.done()) { + const SkIRect& cr = clipper.rect(); + this->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); + clipper.next(); + } +} + +void SkBlitter::blitRegion(const SkRegion& clip) { + SkRegionPriv::VisitSpans(clip, [this](const SkIRect& r) { + this->blitRect(r.left(), r.top(), r.width(), r.height()); + }); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkNullBlitter::blitH(int x, int y, int width) {} + +void SkNullBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], + const int16_t runs[]) {} + +void SkNullBlitter::blitV(int x, int y, int height, SkAlpha alpha) {} + +void SkNullBlitter::blitRect(int x, int y, int width, int height) {} + +void SkNullBlitter::blitMask(const SkMask& mask, const SkIRect& clip) {} + +const SkPixmap* SkNullBlitter::justAnOpaqueColor(uint32_t* value) { + return nullptr; +} + +bool SkNullBlitter::isNullBlitter() const { return true; } + +/////////////////////////////////////////////////////////////////////////////// + +static int compute_anti_width(const int16_t runs[]) { + int width = 0; + + for (;;) { + int count = runs[0]; + + SkASSERT(count >= 0); + if (count == 0) { + break; + } + width += count; + runs += count; + } + return width; +} + +static inline bool y_in_rect(int y, const SkIRect& rect) { + return (unsigned)(y - rect.fTop) < (unsigned)rect.height(); +} + +static inline bool x_in_rect(int x, const SkIRect& rect) { + return (unsigned)(x - rect.fLeft) < (unsigned)rect.width(); +} + +void SkRectClipBlitter::blitH(int left, int y, int width) { + SkASSERT(width > 0); + + if (!y_in_rect(y, fClipRect)) { + return; + } + + int right = left + width; + + if (left < fClipRect.fLeft) { + left = fClipRect.fLeft; + } + if (right > fClipRect.fRight) { + right = fClipRect.fRight; + } + + width = right - left; + if (width > 0) { + fBlitter->blitH(left, y, width); + } +} + +void SkRectClipBlitter::blitAntiH(int left, int y, const SkAlpha aa[], + const int16_t runs[]) { + if (!y_in_rect(y, fClipRect) || left >= fClipRect.fRight) { + return; + } + + int x0 = left; + int x1 = left + compute_anti_width(runs); + + if (x1 <= fClipRect.fLeft) { + return; + } + + SkASSERT(x0 < x1); + if (x0 < fClipRect.fLeft) { + int dx = fClipRect.fLeft - x0; + SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, dx); + runs += dx; + aa += dx; + x0 = fClipRect.fLeft; + } + + SkASSERT(x0 < x1 && runs[x1 - x0] == 0); + if (x1 > fClipRect.fRight) { + x1 = fClipRect.fRight; + SkAlphaRuns::BreakAt((int16_t*)runs, (uint8_t*)aa, x1 - x0); + ((int16_t*)runs)[x1 - x0] = 0; + } + + SkASSERT(x0 < x1 && runs[x1 - x0] == 0); + SkASSERT(compute_anti_width(runs) == x1 - x0); + + fBlitter->blitAntiH(x0, y, aa, runs); +} + +void SkRectClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + SkASSERT(height > 0); + + if (!x_in_rect(x, fClipRect)) { + return; + } + + int y0 = y; + int y1 = y + height; + + if (y0 < fClipRect.fTop) { + y0 = fClipRect.fTop; + } + if (y1 > fClipRect.fBottom) { + y1 = fClipRect.fBottom; + } + + if (y0 < y1) { + fBlitter->blitV(x, y0, y1 - y0, alpha); + } +} + +void SkRectClipBlitter::blitRect(int left, int y, int width, int height) { + SkIRect r; + + r.setLTRB(left, y, left + width, y + height); + if (r.intersect(fClipRect)) { + fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); + } +} + +void SkRectClipBlitter::blitAntiRect(int left, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) { + SkIRect r; + + // The *true* width of the rectangle blitted is width+2: + r.setLTRB(left, y, left + width + 2, y + height); + if (r.intersect(fClipRect)) { + if (r.fLeft != left) { + SkASSERT(r.fLeft > left); + leftAlpha = 255; + } + if (r.fRight != left + width + 2) { + SkASSERT(r.fRight < left + width + 2); + rightAlpha = 255; + } + if (255 == leftAlpha && 255 == rightAlpha) { + fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); + } else if (1 == r.width()) { + if (r.fLeft == left) { + fBlitter->blitV(r.fLeft, r.fTop, r.height(), leftAlpha); + } else { + SkASSERT(r.fLeft == left + width + 1); + fBlitter->blitV(r.fLeft, r.fTop, r.height(), rightAlpha); + } + } else { + fBlitter->blitAntiRect(r.fLeft, r.fTop, r.width() - 2, r.height(), + leftAlpha, rightAlpha); + } + } +} + +void SkRectClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { + SkASSERT(mask.fBounds.contains(clip)); + + SkIRect r = clip; + + if (r.intersect(fClipRect)) { + fBlitter->blitMask(mask, r); + } +} + +const SkPixmap* SkRectClipBlitter::justAnOpaqueColor(uint32_t* value) { + return fBlitter->justAnOpaqueColor(value); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkRgnClipBlitter::blitH(int x, int y, int width) { + SkRegion::Spanerator span(*fRgn, y, x, x + width); + int left, right; + + while (span.next(&left, &right)) { + SkASSERT(left < right); + fBlitter->blitH(left, y, right - left); + } +} + +void SkRgnClipBlitter::blitAntiH(int x, int y, const SkAlpha aa[], + const int16_t runs[]) { + int width = compute_anti_width(runs); + SkRegion::Spanerator span(*fRgn, y, x, x + width); + int left, right; + SkDEBUGCODE(const SkIRect& bounds = fRgn->getBounds();) + + int prevRite = x; + while (span.next(&left, &right)) { + SkASSERT(x <= left); + SkASSERT(left < right); + SkASSERT(left >= bounds.fLeft && right <= bounds.fRight); + + SkAlphaRuns::Break((int16_t*)runs, (uint8_t*)aa, left - x, right - left); + + // now zero before left + if (left > prevRite) { + int index = prevRite - x; + ((uint8_t*)aa)[index] = 0; // skip runs after right + ((int16_t*)runs)[index] = SkToS16(left - prevRite); + } + + prevRite = right; + } + + if (prevRite > x) { + ((int16_t*)runs)[prevRite - x] = 0; + + if (x < 0) { + int skip = runs[0]; + SkASSERT(skip >= -x); + aa += skip; + runs += skip; + x += skip; + } + fBlitter->blitAntiH(x, y, aa, runs); + } +} + +void SkRgnClipBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + SkIRect bounds; + bounds.setXYWH(x, y, 1, height); + + SkRegion::Cliperator iter(*fRgn, bounds); + + while (!iter.done()) { + const SkIRect& r = iter.rect(); + SkASSERT(bounds.contains(r)); + + fBlitter->blitV(x, r.fTop, r.height(), alpha); + iter.next(); + } +} + +void SkRgnClipBlitter::blitRect(int x, int y, int width, int height) { + SkIRect bounds; + bounds.setXYWH(x, y, width, height); + + SkRegion::Cliperator iter(*fRgn, bounds); + + while (!iter.done()) { + const SkIRect& r = iter.rect(); + SkASSERT(bounds.contains(r)); + + fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); + iter.next(); + } +} + +void SkRgnClipBlitter::blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) { + // The *true* width of the rectangle to blit is width + 2 + SkIRect bounds; + bounds.setXYWH(x, y, width + 2, height); + + SkRegion::Cliperator iter(*fRgn, bounds); + + while (!iter.done()) { + const SkIRect& r = iter.rect(); + SkASSERT(bounds.contains(r)); + SkASSERT(r.fLeft >= x); + SkASSERT(r.fRight <= x + width + 2); + + SkAlpha effectiveLeftAlpha = (r.fLeft == x) ? leftAlpha : 255; + SkAlpha effectiveRightAlpha = (r.fRight == x + width + 2) ? + rightAlpha : 255; + + if (255 == effectiveLeftAlpha && 255 == effectiveRightAlpha) { + fBlitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); + } else if (1 == r.width()) { + if (r.fLeft == x) { + fBlitter->blitV(r.fLeft, r.fTop, r.height(), + effectiveLeftAlpha); + } else { + SkASSERT(r.fLeft == x + width + 1); + fBlitter->blitV(r.fLeft, r.fTop, r.height(), + effectiveRightAlpha); + } + } else { + fBlitter->blitAntiRect(r.fLeft, r.fTop, r.width() - 2, r.height(), + effectiveLeftAlpha, effectiveRightAlpha); + } + iter.next(); + } +} + + +void SkRgnClipBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { + SkASSERT(mask.fBounds.contains(clip)); + + SkRegion::Cliperator iter(*fRgn, clip); + const SkIRect& r = iter.rect(); + SkBlitter* blitter = fBlitter; + + while (!iter.done()) { + blitter->blitMask(mask, r); + iter.next(); + } +} + +const SkPixmap* SkRgnClipBlitter::justAnOpaqueColor(uint32_t* value) { + return fBlitter->justAnOpaqueColor(value); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkBlitter* SkBlitterClipper::apply(SkBlitter* blitter, const SkRegion* clip, + const SkIRect* ir) { + if (clip) { + const SkIRect& clipR = clip->getBounds(); + + if (clip->isEmpty() || (ir && !SkIRect::Intersects(clipR, *ir))) { + blitter = &fNullBlitter; + } else if (clip->isRect()) { + if (ir == nullptr || !clipR.contains(*ir)) { + fRectBlitter.init(blitter, clipR); + blitter = &fRectBlitter; + } + } else { + fRgnBlitter.init(blitter, clip); + blitter = &fRgnBlitter; + } + } + return blitter; +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "src/core/SkCoreBlitters.h" + +bool SkBlitter::UseLegacyBlitter(const SkPixmap& device, + const SkPaint& paint, + const SkMatrix& matrix) { + if (gSkForceRasterPipelineBlitter || gUseSkVMBlitter) { + return false; + } +#if defined(SK_FORCE_RASTER_PIPELINE_BLITTER) + return false; +#else + + if (paint.isDither()) { + return false; + } + + const SkMaskFilterBase* mf = as_MFB(paint.getMaskFilter()); + const auto mode = paint.asBlendMode(); + + // The legacy blitters cannot handle any of these complex features (anymore). + if (device.alphaType() == kUnpremul_SkAlphaType || + !mode || + mode.value() > SkBlendMode::kLastCoeffMode || + (mf && mf->getFormat() == SkMask::k3D_Format)) { + return false; + } + + // All the real legacy fast paths are for shaders and SrcOver. + // Choosing SkRasterPipelineBlitter will also let us to hit its single-color memset path. + if (!paint.getShader() && mode != SkBlendMode::kSrcOver) { + return false; + } + + auto cs = device.colorSpace(); + // We check (indirectly via makeContext()) later on if the shader can handle the colorspace + // in legacy mode, so here we just focus on if a single color needs raster-pipeline. + if (cs && !paint.getShader()) { + if (!paint.getColor4f().fitsInBytes() || !cs->isSRGB()) { + return false; + } + } + + // Only kN32 is handled by legacy blitters now + return device.colorType() == kN32_SkColorType; +#endif +} + +SkBlitter* SkBlitter::Choose(const SkPixmap& device, + const SkMatrix& ctm, + const SkPaint& origPaint, + SkArenaAlloc* alloc, + bool drawCoverage, + sk_sp clipShader, + const SkSurfaceProps& props) { + SkASSERT(alloc); + + if (kUnknown_SkColorType == device.colorType()) { + return alloc->make(); + } + + // We may tweak the original paint as we go. + SkTCopyOnFirstWrite paint(origPaint); + + if (auto mode = paint->asBlendMode()) { + // We have the most fast-paths for SrcOver, so see if we can act like SrcOver. + if (mode.value() != SkBlendMode::kSrcOver) { + switch (SkInterpretXfermode(*paint, SkColorTypeIsAlwaysOpaque(device.colorType()))) { + case kSrcOver_SkXfermodeInterpretation: + paint.writable()->setBlendMode(SkBlendMode::kSrcOver); + break; + case kSkipDrawing_SkXfermodeInterpretation: + return alloc->make(); + default: + break; + } + } + + // A Clear blend mode will ignore the entire color pipeline, as if Src mode with 0x00000000. + if (mode.value() == SkBlendMode::kClear) { + SkPaint* p = paint.writable(); + p->setShader(nullptr); + p->setColorFilter(nullptr); + p->setBlendMode(SkBlendMode::kSrc); + p->setColor(0x00000000); + } + } + + if (paint->getColorFilter()) { + SkPaintPriv::RemoveColorFilter(paint.writable(), device.colorSpace()); + } + SkASSERT(!paint->getColorFilter()); + + if (drawCoverage) { + if (device.colorType() == kAlpha_8_SkColorType) { + SkASSERT(!paint->getShader()); + SkASSERT(paint->isSrcOver()); + return alloc->make(device, *paint); + } + return alloc->make(); + } + + if (paint->isDither() && !SkPaintPriv::ShouldDither(*paint, device.colorType())) { + paint.writable()->setDither(false); + } + + // Same basic idea used a few times: try SkRP, then try SkVM, then give up with a null-blitter. + // (Setting gUseSkVMBlitter is the only way we prefer SkVM over SkRP at the moment.) + auto create_SkRP_or_SkVMBlitter = [&]() -> SkBlitter* { + + // We need to make sure that in case RP blitter cannot be created we use VM and + // when VM blitter cannot be created we use RP + if (gUseSkVMBlitter) { + if (auto blitter = SkVMBlitter::Make(device, *paint, ctm, alloc, clipShader)) { + return blitter; + } + } + if (auto blitter = SkCreateRasterPipelineBlitter(device, + *paint, + ctm, + alloc, + clipShader, + props)) { + return blitter; + } + if (!gUseSkVMBlitter) { + if (auto blitter = SkVMBlitter::Make(device, *paint, ctm, alloc, clipShader)) { + return blitter; + } + } + return alloc->make(); + }; + + // We'll end here for many interesting cases: color spaces, color filters, most color types. + if (clipShader || !UseLegacyBlitter(device, *paint, ctm)) { + return create_SkRP_or_SkVMBlitter(); + } + + // Everything but legacy kN32_SkColorType should already be handled. + SkASSERT(device.colorType() == kN32_SkColorType); + + // And we should either have a shader, be blending with SrcOver, or both. + SkASSERT(paint->getShader() || paint->asBlendMode() == SkBlendMode::kSrcOver); + + // Legacy blitters keep their shader state on a shader context. + SkShaderBase::Context* shaderContext = nullptr; + if (paint->getShader()) { + shaderContext = as_SB(paint->getShader())->makeContext( + {paint->getColor4f(), ctm, nullptr, device.colorType(), device.colorSpace(), props}, + alloc); + + // Creating the context isn't always possible... try fallbacks before giving up. + if (!shaderContext) { + return create_SkRP_or_SkVMBlitter(); + } + } + + switch (device.colorType()) { + case kN32_SkColorType: + if (shaderContext) { + return alloc->make(device, *paint, shaderContext); + } else if (paint->getColor() == SK_ColorBLACK) { + return alloc->make(device, *paint); + } else if (paint->getAlpha() == 0xFF) { + return alloc->make(device, *paint); + } else { + return alloc->make(device, *paint); + } + + default: + SkASSERT(false); + return alloc->make(); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +SkShaderBlitter::SkShaderBlitter(const SkPixmap& device, const SkPaint& paint, + SkShaderBase::Context* shaderContext) + : INHERITED(device) + , fShader(paint.getShader()) + , fShaderContext(shaderContext) { + SkASSERT(fShader); + SkASSERT(fShaderContext); + + fShader->ref(); + fShaderFlags = fShaderContext->getFlags(); + fConstInY = SkToBool(fShaderFlags & SkShaderBase::kConstInY32_Flag); +} + +SkShaderBlitter::~SkShaderBlitter() { + fShader->unref(); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG + +void SkRectClipCheckBlitter::blitH(int x, int y, int width) { + SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, width, 1))); + fBlitter->blitH(x, y, width); +} + +void SkRectClipCheckBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) { + const int16_t* iter = runs; + for (; *iter; iter += *iter) + ; + int width = iter - runs; + SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, width, 1))); + fBlitter->blitAntiH(x, y, aa, runs); +} + +void SkRectClipCheckBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, 1, height))); + fBlitter->blitV(x, y, height, alpha); +} + +void SkRectClipCheckBlitter::blitRect(int x, int y, int width, int height) { + SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, width, height))); + fBlitter->blitRect(x, y, width, height); +} + +void SkRectClipCheckBlitter::blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) { + bool skipLeft = !leftAlpha; + bool skipRight = !rightAlpha; + SkIRect r = SkIRect::MakeXYWH(x + skipLeft, y, width + 2 - skipRight - skipLeft, height); + SkASSERT(r.isEmpty() || fClipRect.contains(r)); + fBlitter->blitAntiRect(x, y, width, height, leftAlpha, rightAlpha); +} + +void SkRectClipCheckBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { + SkASSERT(mask.fBounds.contains(clip)); + SkASSERT(fClipRect.contains(clip)); + fBlitter->blitMask(mask, clip); +} + +const SkPixmap* SkRectClipCheckBlitter::justAnOpaqueColor(uint32_t* value) { + return fBlitter->justAnOpaqueColor(value); +} + +void SkRectClipCheckBlitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { + SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, 2, 1))); + fBlitter->blitAntiH2(x, y, a0, a1); +} + +void SkRectClipCheckBlitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { + SkASSERT(fClipRect.contains(SkIRect::MakeXYWH(x, y, 1, 2))); + fBlitter->blitAntiV2(x, y, a0, a1); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkBlitter.h b/gfx/skia/skia/src/core/SkBlitter.h new file mode 100644 index 0000000000..03329da6ee --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitter.h @@ -0,0 +1,300 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlitter_DEFINED +#define SkBlitter_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkRect.h" +#include "include/core/SkRegion.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkAutoMalloc.h" +#include "src/shaders/SkShaderBase.h" + +class SkArenaAlloc; +class SkMatrix; +class SkMatrixProvider; +class SkPaint; +class SkPixmap; +class SkSurfaceProps; +struct SkMask; + +/** SkBlitter and its subclasses are responsible for actually writing pixels + into memory. Besides efficiency, they handle clipping and antialiasing. + A SkBlitter subclass contains all the context needed to generate pixels + for the destination and how src/generated pixels map to the destination. + The coordinates passed to the blitX calls are in destination pixel space. +*/ +class SkBlitter { +public: + virtual ~SkBlitter(); + + /// Blit a horizontal run of one or more pixels. + virtual void blitH(int x, int y, int width) = 0; + + /// Blit a horizontal run of antialiased pixels; runs[] is a *sparse* + /// zero-terminated run-length encoding of spans of constant alpha values. + /// The runs[] and antialias[] work together to represent long runs of pixels with the same + /// alphas. The runs[] contains the number of pixels with the same alpha, and antialias[] + /// contain the coverage value for that number of pixels. The runs[] (and antialias[]) are + /// encoded in a clever way. The runs array is zero terminated, and has enough entries for + /// each pixel plus one, in most cases some of the entries will not contain valid data. An entry + /// in the runs array contains the number of pixels (np) that have the same alpha value. The + /// next np value is found np entries away. For example, if runs[0] = 7, then the next valid + /// entry will by at runs[7]. The runs array and antialias[] are coupled by index. So, if the + /// np entry is at runs[45] = 12 then the alpha value can be found at antialias[45] = 0x88. + /// This would mean to use an alpha value of 0x88 for the next 12 pixels starting at pixel 45. + virtual void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) = 0; + + /// Blit a vertical run of pixels with a constant alpha value. + virtual void blitV(int x, int y, int height, SkAlpha alpha); + + /// Blit a solid rectangle one or more pixels wide. + virtual void blitRect(int x, int y, int width, int height); + + /** Blit a rectangle with one alpha-blended column on the left, + width (zero or more) opaque pixels, and one alpha-blended column + on the right. + The result will always be at least two pixels wide. + */ + virtual void blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha); + + // Blit a rect in AA with size at least 3 x 3 (small rect has too many edge cases...) + void blitFatAntiRect(const SkRect& rect); + + /// Blit a pattern of pixels defined by a rectangle-clipped mask; + /// typically used for text. + virtual void blitMask(const SkMask&, const SkIRect& clip); + + /** If the blitter just sets a single value for each pixel, return the + bitmap it draws into, and assign value. If not, return nullptr and ignore + the value parameter. + */ + virtual const SkPixmap* justAnOpaqueColor(uint32_t* value); + + // (x, y), (x + 1, y) + virtual void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { + int16_t runs[3]; + uint8_t aa[2]; + + runs[0] = 1; + runs[1] = 1; + runs[2] = 0; + aa[0] = SkToU8(a0); + aa[1] = SkToU8(a1); + this->blitAntiH(x, y, aa, runs); + } + + // (x, y), (x, y + 1) + virtual void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { + int16_t runs[2]; + uint8_t aa[1]; + + runs[0] = 1; + runs[1] = 0; + aa[0] = SkToU8(a0); + this->blitAntiH(x, y, aa, runs); + // reset in case the clipping blitter modified runs + runs[0] = 1; + runs[1] = 0; + aa[0] = SkToU8(a1); + this->blitAntiH(x, y + 1, aa, runs); + } + + /** + * Special method just to identify the null blitter, which is returned + * from Choose() if the request cannot be fulfilled. Default impl + * returns false. + */ + virtual bool isNullBlitter() const; + + /** + * Special methods for blitters that can blit more than one row at a time. + * This function returns the number of rows that this blitter could optimally + * process at a time. It is still required to support blitting one scanline + * at a time. + */ + virtual int requestRowsPreserved() const { return 1; } + + /** + * This function allocates memory for the blitter that the blitter then owns. + * The memory can be used by the calling function at will, but it will be + * released when the blitter's destructor is called. This function returns + * nullptr if no persistent memory is needed by the blitter. + */ + virtual void* allocBlitMemory(size_t sz) { + return fBlitMemory.reset(sz, SkAutoMalloc::kReuse_OnShrink); + } + + ///@name non-virtual helpers +#if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) + void blitMaskRegion(const SkMask& mask, const SkRegion& clip); +#endif + void blitRectRegion(const SkIRect& rect, const SkRegion& clip); + void blitRegion(const SkRegion& clip); + ///@} + + /** @name Factories + Return the correct blitter to use given the specified context. + */ + static SkBlitter* Choose(const SkPixmap& dst, + const SkMatrix& ctm, + const SkPaint& paint, + SkArenaAlloc*, + bool drawCoverage, + sk_sp clipShader, + const SkSurfaceProps& props); + + static SkBlitter* ChooseSprite(const SkPixmap& dst, + const SkPaint&, + const SkPixmap& src, + int left, int top, + SkArenaAlloc*, sk_sp clipShader); + ///@} + + static bool UseLegacyBlitter(const SkPixmap&, const SkPaint&, const SkMatrix&); + +protected: + SkAutoMalloc fBlitMemory; +}; + +/** This blitter silently never draws anything. +*/ +class SkNullBlitter : public SkBlitter { +public: + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitMask(const SkMask&, const SkIRect& clip) override; + const SkPixmap* justAnOpaqueColor(uint32_t* value) override; + bool isNullBlitter() const override; +}; + +/** Wraps another (real) blitter, and ensures that the real blitter is only + called with coordinates that have been clipped by the specified clipRect. + This means the caller need not perform the clipping ahead of time. +*/ +class SkRectClipBlitter : public SkBlitter { +public: + void init(SkBlitter* blitter, const SkIRect& clipRect) { + SkASSERT(!clipRect.isEmpty()); + fBlitter = blitter; + fClipRect = clipRect; + } + + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) override; + void blitMask(const SkMask&, const SkIRect& clip) override; + const SkPixmap* justAnOpaqueColor(uint32_t* value) override; + + int requestRowsPreserved() const override { + return fBlitter->requestRowsPreserved(); + } + + void* allocBlitMemory(size_t sz) override { + return fBlitter->allocBlitMemory(sz); + } + +private: + SkBlitter* fBlitter; + SkIRect fClipRect; +}; + +/** Wraps another (real) blitter, and ensures that the real blitter is only + called with coordinates that have been clipped by the specified clipRgn. + This means the caller need not perform the clipping ahead of time. +*/ +class SkRgnClipBlitter : public SkBlitter { +public: + void init(SkBlitter* blitter, const SkRegion* clipRgn) { + SkASSERT(clipRgn && !clipRgn->isEmpty()); + fBlitter = blitter; + fRgn = clipRgn; + } + + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) override; + void blitMask(const SkMask&, const SkIRect& clip) override; + const SkPixmap* justAnOpaqueColor(uint32_t* value) override; + + int requestRowsPreserved() const override { + return fBlitter->requestRowsPreserved(); + } + + void* allocBlitMemory(size_t sz) override { + return fBlitter->allocBlitMemory(sz); + } + +private: + SkBlitter* fBlitter; + const SkRegion* fRgn; +}; + +#ifdef SK_DEBUG +class SkRectClipCheckBlitter : public SkBlitter { +public: + void init(SkBlitter* blitter, const SkIRect& clipRect) { + SkASSERT(blitter); + SkASSERT(!clipRect.isEmpty()); + fBlitter = blitter; + fClipRect = clipRect; + } + + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitAntiRect(int x, int y, int width, int height, + SkAlpha leftAlpha, SkAlpha rightAlpha) override; + void blitMask(const SkMask&, const SkIRect& clip) override; + const SkPixmap* justAnOpaqueColor(uint32_t* value) override; + void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override; + void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override; + + int requestRowsPreserved() const override { + return fBlitter->requestRowsPreserved(); + } + + void* allocBlitMemory(size_t sz) override { + return fBlitter->allocBlitMemory(sz); + } + +private: + SkBlitter* fBlitter; + SkIRect fClipRect; +}; +#endif + +/** Factory to set up the appropriate most-efficient wrapper blitter + to apply a clip. Returns a pointer to a member, so lifetime must + be managed carefully. +*/ +class SkBlitterClipper { +public: + SkBlitter* apply(SkBlitter* blitter, const SkRegion* clip, + const SkIRect* bounds = nullptr); + +private: + SkNullBlitter fNullBlitter; + SkRectClipBlitter fRectBlitter; + SkRgnClipBlitter fRgnBlitter; +}; + +// A good size for creating shader contexts on the stack. +enum {kSkBlitterContextSize = 3332}; + +#endif diff --git a/gfx/skia/skia/src/core/SkBlitter_A8.cpp b/gfx/skia/skia/src/core/SkBlitter_A8.cpp new file mode 100644 index 0000000000..ea01296c99 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitter_A8.cpp @@ -0,0 +1,313 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPaint.h" +#include "include/core/SkTypes.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlitter_A8.h" + +SkA8_Coverage_Blitter::SkA8_Coverage_Blitter(const SkPixmap& device, const SkPaint& paint) + : fDevice(device) +{ + SkASSERT(nullptr == paint.getShader()); + SkASSERT(nullptr == paint.getColorFilter()); +} + +void SkA8_Coverage_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], + const int16_t runs[]) { + uint8_t* device = fDevice.writable_addr8(x, y); + SkDEBUGCODE(int totalCount = 0;) + + for (;;) { + int count = runs[0]; + SkASSERT(count >= 0); + if (count == 0) { + return; + } + if (antialias[0]) { + memset(device, antialias[0], count); + } + runs += count; + antialias += count; + device += count; + + SkDEBUGCODE(totalCount += count;) + } + SkASSERT(fDevice.width() == totalCount); +} + +void SkA8_Coverage_Blitter::blitH(int x, int y, int width) { + memset(fDevice.writable_addr8(x, y), 0xFF, width); +} + +void SkA8_Coverage_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { + if (0 == alpha) { + return; + } + + uint8_t* dst = fDevice.writable_addr8(x, y); + const size_t dstRB = fDevice.rowBytes(); + while (--height >= 0) { + *dst = alpha; + dst += dstRB; + } +} + +void SkA8_Coverage_Blitter::blitRect(int x, int y, int width, int height) { + uint8_t* dst = fDevice.writable_addr8(x, y); + const size_t dstRB = fDevice.rowBytes(); + while (--height >= 0) { + memset(dst, 0xFF, width); + dst += dstRB; + } +} + +void SkA8_Coverage_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { + if (SkMask::kA8_Format != mask.fFormat) { + this->SkBlitter::blitMask(mask, clip); + return; + } + + int x = clip.fLeft; + int y = clip.fTop; + int width = clip.width(); + int height = clip.height(); + + uint8_t* dst = fDevice.writable_addr8(x, y); + const uint8_t* src = mask.getAddr8(x, y); + const size_t srcRB = mask.fRowBytes; + const size_t dstRB = fDevice.rowBytes(); + + while (--height >= 0) { + memcpy(dst, src, width); + dst += dstRB; + src += srcRB; + } +} + +const SkPixmap* SkA8_Coverage_Blitter::justAnOpaqueColor(uint32_t*) { + return nullptr; +} + +////////////// + +static inline uint8_t div255(unsigned prod) { + SkASSERT(prod <= 255*255); + return (prod + 128) * 257 >> 16; +} + +static inline unsigned u8_lerp(uint8_t a, uint8_t b, uint8_t t) { + return div255((255 - t) * a + t * b); +} + +using AlphaProc = uint8_t(*)(uint8_t src, uint8_t dst); + +static uint8_t srcover_p (uint8_t src, uint8_t dst) { return src + div255((255 - src) * dst); } +static uint8_t src_p (uint8_t src, uint8_t dst) { return src; } + +template void A8_row_bw(uint8_t dst[], uint8_t src, int N, Mode proc) { + for (int i = 0; i < N; ++i) { + dst[i] = proc(src, dst[i]); + } +} +using A8_RowBlitBW = void(*)(uint8_t[], uint8_t, int); + +template +void A8_row_aa(uint8_t dst[], uint8_t src, int N, uint8_t aa, Mode proc, const bool canFoldAA) { + if (canFoldAA) { + src = div255(src * aa); + for (int i = 0; i < N; ++i) { + dst[i] = proc(src, dst[i]); + } + } else { + for (int i = 0; i < N; ++i) { + dst[i] = u8_lerp(dst[i], proc(src, dst[i]), aa); + } + } +} +using A8_RowBlitAA = void(*)(uint8_t[], uint8_t, int, uint8_t aa); + +#define WRAP_BLIT(proc, canFoldAA) \ + proc, \ + [](uint8_t dst[], uint8_t src, int N) \ + { A8_row_bw(dst, src, N, proc); }, \ + [](uint8_t dst[], uint8_t src, int N, uint8_t aa) \ + { A8_row_aa(dst, src, N, aa, proc, canFoldAA); } + +struct A8_RowBlitBWPair { + SkBlendMode mode; + AlphaProc oneProc; + A8_RowBlitBW bwProc; + A8_RowBlitAA aaProc; +}; +constexpr A8_RowBlitBWPair gA8_RowBlitPairs[] = { + {SkBlendMode::kSrcOver, WRAP_BLIT(srcover_p, true)}, + {SkBlendMode::kSrc, WRAP_BLIT(src_p, false)}, +}; +#undef WRAP_BLIT + +static const A8_RowBlitBWPair* find_a8_rowproc_pair(SkBlendMode bm) { + for (auto& pair : gA8_RowBlitPairs) { + if (pair.mode == bm) { + return &pair; + } + } + return nullptr; +} + +class SkA8_Blitter : public SkBlitter { +public: + SkA8_Blitter(const SkPixmap& device, const SkPaint& paint); + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitMask(const SkMask&, const SkIRect&) override; + const SkPixmap* justAnOpaqueColor(uint32_t*) override; + +private: + const SkPixmap fDevice; + AlphaProc fOneProc; + A8_RowBlitBW fBWProc; + A8_RowBlitAA fAAProc; + SkAlpha fSrc; + + using INHERITED = SkBlitter; +}; + +SkA8_Blitter::SkA8_Blitter(const SkPixmap& device, + const SkPaint& paint) : fDevice(device) { + SkASSERT(nullptr == paint.getShader()); + SkASSERT(nullptr == paint.getColorFilter()); + auto mode = paint.asBlendMode(); + SkASSERT(mode); + auto pair = find_a8_rowproc_pair(*mode); + SkASSERT(pair); + + fOneProc = pair->oneProc; + fBWProc = pair->bwProc; + fAAProc = pair->aaProc; + fSrc = paint.getAlpha(); +} + +void SkA8_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) { + uint8_t* device = fDevice.writable_addr8(x, y); + SkDEBUGCODE(int totalCount = 0;) + + for (;;) { + int count = runs[0]; + SkASSERT(count >= 0); + if (count == 0) { + return; + } + + if (antialias[0] == 0xFF) { + fBWProc(device, fSrc, count); + } else if (antialias[0] != 0) { + fAAProc(device, fSrc, count, antialias[0]); + } + + runs += count; + antialias += count; + device += count; + + SkDEBUGCODE(totalCount += count;) + } + SkASSERT(fDevice.width() == totalCount); +} + +void SkA8_Blitter::blitH(int x, int y, int width) { + fBWProc(fDevice.writable_addr8(x, y), fSrc, width); +} + +void SkA8_Blitter::blitV(int x, int y, int height, SkAlpha aa) { + uint8_t* device = fDevice.writable_addr8(x, y); + const size_t dstRB = fDevice.rowBytes(); + + if (aa == 0xFF) { + while (--height >= 0) { + *device = fOneProc(fSrc, *device); + device += dstRB; + } + } else if (aa != 0) { + while (--height >= 0) { + fAAProc(device, fSrc, 1, aa); + device += dstRB; + } + } +} + +void SkA8_Blitter::blitRect(int x, int y, int width, int height) { + uint8_t* device = fDevice.writable_addr8(x, y); + const size_t dstRB = fDevice.rowBytes(); + + while (--height >= 0) { + fBWProc(device, fSrc, width); + device += dstRB; + } +} + +void SkA8_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { + if (SkMask::kA8_Format != mask.fFormat) { + this->INHERITED::blitMask(mask, clip); + return; + } + + int x = clip.fLeft; + int y = clip.fTop; + int width = clip.width(); + int height = clip.height(); + + uint8_t* dst = fDevice.writable_addr8(x, y); + const uint8_t* src = mask.getAddr8(x, y); + const size_t srcRB = mask.fRowBytes; + const size_t dstRB = fDevice.rowBytes(); + + while (--height >= 0) { + for (int i = 0; i < width; ++i) { + dst[i] = u8_lerp(dst[i], fOneProc(fSrc, dst[i]), src[i]); + } + dst += dstRB; + src += srcRB; + } +} + +const SkPixmap* SkA8_Blitter::justAnOpaqueColor(uint32_t*) { + return nullptr; +} + +////////////////// + +SkBlitter* SkA8Blitter_Choose(const SkPixmap& dst, + const SkMatrix& ctm, + const SkPaint& paint, + SkArenaAlloc* alloc, + bool drawCoverage, + sk_sp clipShader, + const SkSurfaceProps&) { + if (dst.colorType() != SkColorType::kAlpha_8_SkColorType) { + return nullptr; + } + if (paint.getShader() || paint.getColorFilter()) { + return nullptr; + } + if (clipShader) { + return nullptr; // would not be hard to support ...? + } + + if (drawCoverage) { + return alloc->make(dst, paint); + } else { + // we only support certain blendmodes... + auto mode = paint.asBlendMode(); + if (mode && find_a8_rowproc_pair(*mode)) { + return alloc->make(dst, paint); + } + } + return nullptr; +} + diff --git a/gfx/skia/skia/src/core/SkBlitter_A8.h b/gfx/skia/skia/src/core/SkBlitter_A8.h new file mode 100644 index 0000000000..cd91d5fdd7 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitter_A8.h @@ -0,0 +1,43 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlitter_A8_DEFINED +#define SkBlitter_A8_DEFINED + +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "src/core/SkBlitter.h" + +class SkPaint; +class SkMatrix; +class SkArenaAlloc; +class SkShader; +class SkSurfaceProps; + +class SkA8_Coverage_Blitter : public SkBlitter { +public: + SkA8_Coverage_Blitter(const SkPixmap& device, const SkPaint& paint); + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitMask(const SkMask&, const SkIRect&) override; + const SkPixmap* justAnOpaqueColor(uint32_t*) override; + +private: + const SkPixmap fDevice; +}; + +SkBlitter* SkA8Blitter_Choose(const SkPixmap& dst, + const SkMatrix& ctm, + const SkPaint& paint, + SkArenaAlloc*, + bool drawCoverage, + sk_sp clipShader, + const SkSurfaceProps&); + +#endif // SkBlitter_A8_DEFINED diff --git a/gfx/skia/skia/src/core/SkBlitter_ARGB32.cpp b/gfx/skia/skia/src/core/SkBlitter_ARGB32.cpp new file mode 100644 index 0000000000..fbb5322080 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitter_ARGB32.cpp @@ -0,0 +1,1420 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkShader.h" +#include "include/private/SkColorData.h" +#include "src/base/SkVx.h" +#include "src/core/SkCoreBlitters.h" +#include "src/core/SkOpts.h" +#include "src/core/SkXfermodePriv.h" + +static inline int upscale_31_to_32(int value) { + SkASSERT((unsigned)value <= 31); + return value + (value >> 4); +} + +static inline int blend_32(int src, int dst, int scale) { + SkASSERT((unsigned)src <= 0xFF); + SkASSERT((unsigned)dst <= 0xFF); + SkASSERT((unsigned)scale <= 32); + return dst + ((src - dst) * scale >> 5); +} + +static inline SkPMColor blend_lcd16(int srcA, int srcR, int srcG, int srcB, + SkPMColor dst, uint16_t mask) { + if (mask == 0) { + return dst; + } + + /* We want all of these in 5bits, hence the shifts in case one of them + * (green) is 6bits. + */ + int maskR = SkGetPackedR16(mask) >> (SK_R16_BITS - 5); + int maskG = SkGetPackedG16(mask) >> (SK_G16_BITS - 5); + int maskB = SkGetPackedB16(mask) >> (SK_B16_BITS - 5); + + // Now upscale them to 0..32, so we can use blend32 + maskR = upscale_31_to_32(maskR); + maskG = upscale_31_to_32(maskG); + maskB = upscale_31_to_32(maskB); + + // srcA has been upscaled to 256 before passed into this function + maskR = maskR * srcA >> 8; + maskG = maskG * srcA >> 8; + maskB = maskB * srcA >> 8; + + int dstR = SkGetPackedR32(dst); + int dstG = SkGetPackedG32(dst); + int dstB = SkGetPackedB32(dst); + + // LCD blitting is only supported if the dst is known/required + // to be opaque + return SkPackARGB32(0xFF, + blend_32(srcR, dstR, maskR), + blend_32(srcG, dstG, maskG), + blend_32(srcB, dstB, maskB)); +} + +static inline SkPMColor blend_lcd16_opaque(int srcR, int srcG, int srcB, + SkPMColor dst, uint16_t mask, + SkPMColor opaqueDst) { + if (mask == 0) { + return dst; + } + + if (0xFFFF == mask) { + return opaqueDst; + } + + /* We want all of these in 5bits, hence the shifts in case one of them + * (green) is 6bits. + */ + int maskR = SkGetPackedR16(mask) >> (SK_R16_BITS - 5); + int maskG = SkGetPackedG16(mask) >> (SK_G16_BITS - 5); + int maskB = SkGetPackedB16(mask) >> (SK_B16_BITS - 5); + + // Now upscale them to 0..32, so we can use blend32 + maskR = upscale_31_to_32(maskR); + maskG = upscale_31_to_32(maskG); + maskB = upscale_31_to_32(maskB); + + int dstR = SkGetPackedR32(dst); + int dstG = SkGetPackedG32(dst); + int dstB = SkGetPackedB32(dst); + + // LCD blitting is only supported if the dst is known/required + // to be opaque + return SkPackARGB32(0xFF, + blend_32(srcR, dstR, maskR), + blend_32(srcG, dstG, maskG), + blend_32(srcB, dstB, maskB)); +} + + +// TODO: rewrite at least the SSE code here. It's miserable. + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #include + + // The following (left) shifts cause the top 5 bits of the mask components to + // line up with the corresponding components in an SkPMColor. + // Note that the mask's RGB16 order may differ from the SkPMColor order. + #define SK_R16x5_R32x5_SHIFT (SK_R32_SHIFT - SK_R16_SHIFT - SK_R16_BITS + 5) + #define SK_G16x5_G32x5_SHIFT (SK_G32_SHIFT - SK_G16_SHIFT - SK_G16_BITS + 5) + #define SK_B16x5_B32x5_SHIFT (SK_B32_SHIFT - SK_B16_SHIFT - SK_B16_BITS + 5) + + #if SK_R16x5_R32x5_SHIFT == 0 + #define SkPackedR16x5ToUnmaskedR32x5_SSE2(x) (x) + #elif SK_R16x5_R32x5_SHIFT > 0 + #define SkPackedR16x5ToUnmaskedR32x5_SSE2(x) (_mm_slli_epi32(x, SK_R16x5_R32x5_SHIFT)) + #else + #define SkPackedR16x5ToUnmaskedR32x5_SSE2(x) (_mm_srli_epi32(x, -SK_R16x5_R32x5_SHIFT)) + #endif + + #if SK_G16x5_G32x5_SHIFT == 0 + #define SkPackedG16x5ToUnmaskedG32x5_SSE2(x) (x) + #elif SK_G16x5_G32x5_SHIFT > 0 + #define SkPackedG16x5ToUnmaskedG32x5_SSE2(x) (_mm_slli_epi32(x, SK_G16x5_G32x5_SHIFT)) + #else + #define SkPackedG16x5ToUnmaskedG32x5_SSE2(x) (_mm_srli_epi32(x, -SK_G16x5_G32x5_SHIFT)) + #endif + + #if SK_B16x5_B32x5_SHIFT == 0 + #define SkPackedB16x5ToUnmaskedB32x5_SSE2(x) (x) + #elif SK_B16x5_B32x5_SHIFT > 0 + #define SkPackedB16x5ToUnmaskedB32x5_SSE2(x) (_mm_slli_epi32(x, SK_B16x5_B32x5_SHIFT)) + #else + #define SkPackedB16x5ToUnmaskedB32x5_SSE2(x) (_mm_srli_epi32(x, -SK_B16x5_B32x5_SHIFT)) + #endif + + static __m128i blend_lcd16_sse2(__m128i &src, __m128i &dst, __m128i &mask, __m128i &srcA) { + // In the following comments, the components of src, dst and mask are + // abbreviated as (s)rc, (d)st, and (m)ask. Color components are marked + // by an R, G, B, or A suffix. Components of one of the four pixels that + // are processed in parallel are marked with 0, 1, 2, and 3. "d1B", for + // example is the blue channel of the second destination pixel. Memory + // layout is shown for an ARGB byte order in a color value. + + // src and srcA store 8-bit values interleaved with zeros. + // src = (0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0) + // srcA = (srcA, 0, srcA, 0, srcA, 0, srcA, 0, + // srcA, 0, srcA, 0, srcA, 0, srcA, 0) + // mask stores 16-bit values (compressed three channels) interleaved with zeros. + // Lo and Hi denote the low and high bytes of a 16-bit value, respectively. + // mask = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0, + // m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0) + + // Get the R,G,B of each 16bit mask pixel, we want all of them in 5 bits. + // r = (0, m0R, 0, 0, 0, m1R, 0, 0, 0, m2R, 0, 0, 0, m3R, 0, 0) + __m128i r = _mm_and_si128(SkPackedR16x5ToUnmaskedR32x5_SSE2(mask), + _mm_set1_epi32(0x1F << SK_R32_SHIFT)); + + // g = (0, 0, m0G, 0, 0, 0, m1G, 0, 0, 0, m2G, 0, 0, 0, m3G, 0) + __m128i g = _mm_and_si128(SkPackedG16x5ToUnmaskedG32x5_SSE2(mask), + _mm_set1_epi32(0x1F << SK_G32_SHIFT)); + + // b = (0, 0, 0, m0B, 0, 0, 0, m1B, 0, 0, 0, m2B, 0, 0, 0, m3B) + __m128i b = _mm_and_si128(SkPackedB16x5ToUnmaskedB32x5_SSE2(mask), + _mm_set1_epi32(0x1F << SK_B32_SHIFT)); + + // Pack the 4 16bit mask pixels into 4 32bit pixels, (p0, p1, p2, p3) + // Each component (m0R, m0G, etc.) is then a 5-bit value aligned to an + // 8-bit position + // mask = (0, m0R, m0G, m0B, 0, m1R, m1G, m1B, + // 0, m2R, m2G, m2B, 0, m3R, m3G, m3B) + mask = _mm_or_si128(_mm_or_si128(r, g), b); + + // Interleave R,G,B into the lower byte of word. + // i.e. split the sixteen 8-bit values from mask into two sets of eight + // 16-bit values, padded by zero. + __m128i maskLo, maskHi; + // maskLo = (0, 0, m0R, 0, m0G, 0, m0B, 0, 0, 0, m1R, 0, m1G, 0, m1B, 0) + maskLo = _mm_unpacklo_epi8(mask, _mm_setzero_si128()); + // maskHi = (0, 0, m2R, 0, m2G, 0, m2B, 0, 0, 0, m3R, 0, m3G, 0, m3B, 0) + maskHi = _mm_unpackhi_epi8(mask, _mm_setzero_si128()); + + // Upscale from 0..31 to 0..32 + // (allows to replace division by left-shift further down) + // Left-shift each component by 4 and add the result back to that component, + // mapping numbers in the range 0..15 to 0..15, and 16..31 to 17..32 + maskLo = _mm_add_epi16(maskLo, _mm_srli_epi16(maskLo, 4)); + maskHi = _mm_add_epi16(maskHi, _mm_srli_epi16(maskHi, 4)); + + // Multiply each component of maskLo and maskHi by srcA + maskLo = _mm_mullo_epi16(maskLo, srcA); + maskHi = _mm_mullo_epi16(maskHi, srcA); + + // Left shift mask components by 8 (divide by 256) + maskLo = _mm_srli_epi16(maskLo, 8); + maskHi = _mm_srli_epi16(maskHi, 8); + + // Interleave R,G,B into the lower byte of the word + // dstLo = (0, 0, d0R, 0, d0G, 0, d0B, 0, 0, 0, d1R, 0, d1G, 0, d1B, 0) + __m128i dstLo = _mm_unpacklo_epi8(dst, _mm_setzero_si128()); + // dstLo = (0, 0, d2R, 0, d2G, 0, d2B, 0, 0, 0, d3R, 0, d3G, 0, d3B, 0) + __m128i dstHi = _mm_unpackhi_epi8(dst, _mm_setzero_si128()); + + // mask = (src - dst) * mask + maskLo = _mm_mullo_epi16(maskLo, _mm_sub_epi16(src, dstLo)); + maskHi = _mm_mullo_epi16(maskHi, _mm_sub_epi16(src, dstHi)); + + // mask = (src - dst) * mask >> 5 + maskLo = _mm_srai_epi16(maskLo, 5); + maskHi = _mm_srai_epi16(maskHi, 5); + + // Add two pixels into result. + // result = dst + ((src - dst) * mask >> 5) + __m128i resultLo = _mm_add_epi16(dstLo, maskLo); + __m128i resultHi = _mm_add_epi16(dstHi, maskHi); + + // Pack into 4 32bit dst pixels. + // resultLo and resultHi contain eight 16-bit components (two pixels) each. + // Merge into one SSE regsiter with sixteen 8-bit values (four pixels), + // clamping to 255 if necessary. + return _mm_packus_epi16(resultLo, resultHi); + } + + static __m128i blend_lcd16_opaque_sse2(__m128i &src, __m128i &dst, __m128i &mask) { + // In the following comments, the components of src, dst and mask are + // abbreviated as (s)rc, (d)st, and (m)ask. Color components are marked + // by an R, G, B, or A suffix. Components of one of the four pixels that + // are processed in parallel are marked with 0, 1, 2, and 3. "d1B", for + // example is the blue channel of the second destination pixel. Memory + // layout is shown for an ARGB byte order in a color value. + + // src and srcA store 8-bit values interleaved with zeros. + // src = (0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0) + // mask stores 16-bit values (shown as high and low bytes) interleaved with + // zeros + // mask = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0, + // m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0) + + // Get the R,G,B of each 16bit mask pixel, we want all of them in 5 bits. + // r = (0, m0R, 0, 0, 0, m1R, 0, 0, 0, m2R, 0, 0, 0, m3R, 0, 0) + __m128i r = _mm_and_si128(SkPackedR16x5ToUnmaskedR32x5_SSE2(mask), + _mm_set1_epi32(0x1F << SK_R32_SHIFT)); + + // g = (0, 0, m0G, 0, 0, 0, m1G, 0, 0, 0, m2G, 0, 0, 0, m3G, 0) + __m128i g = _mm_and_si128(SkPackedG16x5ToUnmaskedG32x5_SSE2(mask), + _mm_set1_epi32(0x1F << SK_G32_SHIFT)); + + // b = (0, 0, 0, m0B, 0, 0, 0, m1B, 0, 0, 0, m2B, 0, 0, 0, m3B) + __m128i b = _mm_and_si128(SkPackedB16x5ToUnmaskedB32x5_SSE2(mask), + _mm_set1_epi32(0x1F << SK_B32_SHIFT)); + + // Pack the 4 16bit mask pixels into 4 32bit pixels, (p0, p1, p2, p3) + // Each component (m0R, m0G, etc.) is then a 5-bit value aligned to an + // 8-bit position + // mask = (0, m0R, m0G, m0B, 0, m1R, m1G, m1B, + // 0, m2R, m2G, m2B, 0, m3R, m3G, m3B) + mask = _mm_or_si128(_mm_or_si128(r, g), b); + + // Interleave R,G,B into the lower byte of word. + // i.e. split the sixteen 8-bit values from mask into two sets of eight + // 16-bit values, padded by zero. + __m128i maskLo, maskHi; + // maskLo = (0, 0, m0R, 0, m0G, 0, m0B, 0, 0, 0, m1R, 0, m1G, 0, m1B, 0) + maskLo = _mm_unpacklo_epi8(mask, _mm_setzero_si128()); + // maskHi = (0, 0, m2R, 0, m2G, 0, m2B, 0, 0, 0, m3R, 0, m3G, 0, m3B, 0) + maskHi = _mm_unpackhi_epi8(mask, _mm_setzero_si128()); + + // Upscale from 0..31 to 0..32 + // (allows to replace division by left-shift further down) + // Left-shift each component by 4 and add the result back to that component, + // mapping numbers in the range 0..15 to 0..15, and 16..31 to 17..32 + maskLo = _mm_add_epi16(maskLo, _mm_srli_epi16(maskLo, 4)); + maskHi = _mm_add_epi16(maskHi, _mm_srli_epi16(maskHi, 4)); + + // Interleave R,G,B into the lower byte of the word + // dstLo = (0, 0, d0R, 0, d0G, 0, d0B, 0, 0, 0, d1R, 0, d1G, 0, d1B, 0) + __m128i dstLo = _mm_unpacklo_epi8(dst, _mm_setzero_si128()); + // dstLo = (0, 0, d2R, 0, d2G, 0, d2B, 0, 0, 0, d3R, 0, d3G, 0, d3B, 0) + __m128i dstHi = _mm_unpackhi_epi8(dst, _mm_setzero_si128()); + + // mask = (src - dst) * mask + maskLo = _mm_mullo_epi16(maskLo, _mm_sub_epi16(src, dstLo)); + maskHi = _mm_mullo_epi16(maskHi, _mm_sub_epi16(src, dstHi)); + + // mask = (src - dst) * mask >> 5 + maskLo = _mm_srai_epi16(maskLo, 5); + maskHi = _mm_srai_epi16(maskHi, 5); + + // Add two pixels into result. + // result = dst + ((src - dst) * mask >> 5) + __m128i resultLo = _mm_add_epi16(dstLo, maskLo); + __m128i resultHi = _mm_add_epi16(dstHi, maskHi); + + // Pack into 4 32bit dst pixels and force opaque. + // resultLo and resultHi contain eight 16-bit components (two pixels) each. + // Merge into one SSE regsiter with sixteen 8-bit values (four pixels), + // clamping to 255 if necessary. Set alpha components to 0xFF. + return _mm_or_si128(_mm_packus_epi16(resultLo, resultHi), + _mm_set1_epi32(SK_A32_MASK << SK_A32_SHIFT)); + } + + void blit_row_lcd16(SkPMColor dst[], const uint16_t mask[], SkColor src, int width, SkPMColor) { + if (width <= 0) { + return; + } + + int srcA = SkColorGetA(src); + int srcR = SkColorGetR(src); + int srcG = SkColorGetG(src); + int srcB = SkColorGetB(src); + + srcA = SkAlpha255To256(srcA); + + if (width >= 4) { + SkASSERT(((size_t)dst & 0x03) == 0); + while (((size_t)dst & 0x0F) != 0) { + *dst = blend_lcd16(srcA, srcR, srcG, srcB, *dst, *mask); + mask++; + dst++; + width--; + } + + __m128i *d = reinterpret_cast<__m128i*>(dst); + // Set alpha to 0xFF and replicate source four times in SSE register. + __m128i src_sse = _mm_set1_epi32(SkPackARGB32(0xFF, srcR, srcG, srcB)); + // Interleave with zeros to get two sets of four 16-bit values. + src_sse = _mm_unpacklo_epi8(src_sse, _mm_setzero_si128()); + // Set srcA_sse to contain eight copies of srcA, padded with zero. + // src_sse=(0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0) + __m128i srcA_sse = _mm_set1_epi16(srcA); + while (width >= 4) { + // Load four destination pixels into dst_sse. + __m128i dst_sse = _mm_load_si128(d); + // Load four 16-bit masks into lower half of mask_sse. + __m128i mask_sse = _mm_loadl_epi64( + reinterpret_cast(mask)); + + // Check whether masks are equal to 0 and get the highest bit + // of each byte of result, if masks are all zero, we will get + // pack_cmp to 0xFFFF + int pack_cmp = _mm_movemask_epi8(_mm_cmpeq_epi16(mask_sse, + _mm_setzero_si128())); + + // if mask pixels are not all zero, we will blend the dst pixels + if (pack_cmp != 0xFFFF) { + // Unpack 4 16bit mask pixels to + // mask_sse = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0, + // m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0) + mask_sse = _mm_unpacklo_epi16(mask_sse, + _mm_setzero_si128()); + + // Process 4 32bit dst pixels + __m128i result = blend_lcd16_sse2(src_sse, dst_sse, mask_sse, srcA_sse); + _mm_store_si128(d, result); + } + + d++; + mask += 4; + width -= 4; + } + + dst = reinterpret_cast(d); + } + + while (width > 0) { + *dst = blend_lcd16(srcA, srcR, srcG, srcB, *dst, *mask); + mask++; + dst++; + width--; + } + } + + void blit_row_lcd16_opaque(SkPMColor dst[], const uint16_t mask[], + SkColor src, int width, SkPMColor opaqueDst) { + if (width <= 0) { + return; + } + + int srcR = SkColorGetR(src); + int srcG = SkColorGetG(src); + int srcB = SkColorGetB(src); + + if (width >= 4) { + SkASSERT(((size_t)dst & 0x03) == 0); + while (((size_t)dst & 0x0F) != 0) { + *dst = blend_lcd16_opaque(srcR, srcG, srcB, *dst, *mask, opaqueDst); + mask++; + dst++; + width--; + } + + __m128i *d = reinterpret_cast<__m128i*>(dst); + // Set alpha to 0xFF and replicate source four times in SSE register. + __m128i src_sse = _mm_set1_epi32(SkPackARGB32(0xFF, srcR, srcG, srcB)); + // Set srcA_sse to contain eight copies of srcA, padded with zero. + // src_sse=(0xFF, 0, sR, 0, sG, 0, sB, 0, 0xFF, 0, sR, 0, sG, 0, sB, 0) + src_sse = _mm_unpacklo_epi8(src_sse, _mm_setzero_si128()); + while (width >= 4) { + // Load four destination pixels into dst_sse. + __m128i dst_sse = _mm_load_si128(d); + // Load four 16-bit masks into lower half of mask_sse. + __m128i mask_sse = _mm_loadl_epi64( + reinterpret_cast(mask)); + + // Check whether masks are equal to 0 and get the highest bit + // of each byte of result, if masks are all zero, we will get + // pack_cmp to 0xFFFF + int pack_cmp = _mm_movemask_epi8(_mm_cmpeq_epi16(mask_sse, + _mm_setzero_si128())); + + // if mask pixels are not all zero, we will blend the dst pixels + if (pack_cmp != 0xFFFF) { + // Unpack 4 16bit mask pixels to + // mask_sse = (m0RGBLo, m0RGBHi, 0, 0, m1RGBLo, m1RGBHi, 0, 0, + // m2RGBLo, m2RGBHi, 0, 0, m3RGBLo, m3RGBHi, 0, 0) + mask_sse = _mm_unpacklo_epi16(mask_sse, + _mm_setzero_si128()); + + // Process 4 32bit dst pixels + __m128i result = blend_lcd16_opaque_sse2(src_sse, dst_sse, mask_sse); + _mm_store_si128(d, result); + } + + d++; + mask += 4; + width -= 4; + } + + dst = reinterpret_cast(d); + } + + while (width > 0) { + *dst = blend_lcd16_opaque(srcR, srcG, srcB, *dst, *mask, opaqueDst); + mask++; + dst++; + width--; + } + } + +#elif defined(SK_ARM_HAS_NEON) + #include + + #define NEON_A (SK_A32_SHIFT / 8) + #define NEON_R (SK_R32_SHIFT / 8) + #define NEON_G (SK_G32_SHIFT / 8) + #define NEON_B (SK_B32_SHIFT / 8) + + static inline uint8x8_t blend_32_neon(uint8x8_t src, uint8x8_t dst, uint16x8_t scale) { + int16x8_t src_wide, dst_wide; + + src_wide = vreinterpretq_s16_u16(vmovl_u8(src)); + dst_wide = vreinterpretq_s16_u16(vmovl_u8(dst)); + + src_wide = (src_wide - dst_wide) * vreinterpretq_s16_u16(scale); + + dst_wide += vshrq_n_s16(src_wide, 5); + + return vmovn_u16(vreinterpretq_u16_s16(dst_wide)); + } + + void blit_row_lcd16_opaque(SkPMColor dst[], const uint16_t src[], + SkColor color, int width, + SkPMColor opaqueDst) { + int colR = SkColorGetR(color); + int colG = SkColorGetG(color); + int colB = SkColorGetB(color); + + uint8x8_t vcolR = vdup_n_u8(colR); + uint8x8_t vcolG = vdup_n_u8(colG); + uint8x8_t vcolB = vdup_n_u8(colB); + uint8x8_t vopqDstA = vdup_n_u8(SkGetPackedA32(opaqueDst)); + uint8x8_t vopqDstR = vdup_n_u8(SkGetPackedR32(opaqueDst)); + uint8x8_t vopqDstG = vdup_n_u8(SkGetPackedG32(opaqueDst)); + uint8x8_t vopqDstB = vdup_n_u8(SkGetPackedB32(opaqueDst)); + + while (width >= 8) { + uint8x8x4_t vdst; + uint16x8_t vmask; + uint16x8_t vmaskR, vmaskG, vmaskB; + uint8x8_t vsel_trans, vsel_opq; + + vdst = vld4_u8((uint8_t*)dst); + vmask = vld1q_u16(src); + + // Prepare compare masks + vsel_trans = vmovn_u16(vceqq_u16(vmask, vdupq_n_u16(0))); + vsel_opq = vmovn_u16(vceqq_u16(vmask, vdupq_n_u16(0xFFFF))); + + // Get all the color masks on 5 bits + vmaskR = vshrq_n_u16(vmask, SK_R16_SHIFT); + vmaskG = vshrq_n_u16(vshlq_n_u16(vmask, SK_R16_BITS), + SK_B16_BITS + SK_R16_BITS + 1); + vmaskB = vmask & vdupq_n_u16(SK_B16_MASK); + + // Upscale to 0..32 + vmaskR = vmaskR + vshrq_n_u16(vmaskR, 4); + vmaskG = vmaskG + vshrq_n_u16(vmaskG, 4); + vmaskB = vmaskB + vshrq_n_u16(vmaskB, 4); + + vdst.val[NEON_A] = vbsl_u8(vsel_trans, vdst.val[NEON_A], vdup_n_u8(0xFF)); + vdst.val[NEON_A] = vbsl_u8(vsel_opq, vopqDstA, vdst.val[NEON_A]); + + vdst.val[NEON_R] = blend_32_neon(vcolR, vdst.val[NEON_R], vmaskR); + vdst.val[NEON_G] = blend_32_neon(vcolG, vdst.val[NEON_G], vmaskG); + vdst.val[NEON_B] = blend_32_neon(vcolB, vdst.val[NEON_B], vmaskB); + + vdst.val[NEON_R] = vbsl_u8(vsel_opq, vopqDstR, vdst.val[NEON_R]); + vdst.val[NEON_G] = vbsl_u8(vsel_opq, vopqDstG, vdst.val[NEON_G]); + vdst.val[NEON_B] = vbsl_u8(vsel_opq, vopqDstB, vdst.val[NEON_B]); + + vst4_u8((uint8_t*)dst, vdst); + + dst += 8; + src += 8; + width -= 8; + } + + // Leftovers + for (int i = 0; i < width; i++) { + dst[i] = blend_lcd16_opaque(colR, colG, colB, dst[i], src[i], opaqueDst); + } + } + + void blit_row_lcd16(SkPMColor dst[], const uint16_t src[], + SkColor color, int width, SkPMColor) { + int colA = SkColorGetA(color); + int colR = SkColorGetR(color); + int colG = SkColorGetG(color); + int colB = SkColorGetB(color); + + colA = SkAlpha255To256(colA); + + uint16x8_t vcolA = vdupq_n_u16(colA); + uint8x8_t vcolR = vdup_n_u8(colR); + uint8x8_t vcolG = vdup_n_u8(colG); + uint8x8_t vcolB = vdup_n_u8(colB); + + while (width >= 8) { + uint8x8x4_t vdst; + uint16x8_t vmask; + uint16x8_t vmaskR, vmaskG, vmaskB; + + vdst = vld4_u8((uint8_t*)dst); + vmask = vld1q_u16(src); + + // Get all the color masks on 5 bits + vmaskR = vshrq_n_u16(vmask, SK_R16_SHIFT); + vmaskG = vshrq_n_u16(vshlq_n_u16(vmask, SK_R16_BITS), + SK_B16_BITS + SK_R16_BITS + 1); + vmaskB = vmask & vdupq_n_u16(SK_B16_MASK); + + // Upscale to 0..32 + vmaskR = vmaskR + vshrq_n_u16(vmaskR, 4); + vmaskG = vmaskG + vshrq_n_u16(vmaskG, 4); + vmaskB = vmaskB + vshrq_n_u16(vmaskB, 4); + + vmaskR = vshrq_n_u16(vmaskR * vcolA, 8); + vmaskG = vshrq_n_u16(vmaskG * vcolA, 8); + vmaskB = vshrq_n_u16(vmaskB * vcolA, 8); + + vdst.val[NEON_A] = vdup_n_u8(0xFF); + vdst.val[NEON_R] = blend_32_neon(vcolR, vdst.val[NEON_R], vmaskR); + vdst.val[NEON_G] = blend_32_neon(vcolG, vdst.val[NEON_G], vmaskG); + vdst.val[NEON_B] = blend_32_neon(vcolB, vdst.val[NEON_B], vmaskB); + + vst4_u8((uint8_t*)dst, vdst); + + dst += 8; + src += 8; + width -= 8; + } + + for (int i = 0; i < width; i++) { + dst[i] = blend_lcd16(colA, colR, colG, colB, dst[i], src[i]); + } + } + +#else + + static inline void blit_row_lcd16(SkPMColor dst[], const uint16_t mask[], + SkColor src, int width, SkPMColor) { + int srcA = SkColorGetA(src); + int srcR = SkColorGetR(src); + int srcG = SkColorGetG(src); + int srcB = SkColorGetB(src); + + srcA = SkAlpha255To256(srcA); + + for (int i = 0; i < width; i++) { + dst[i] = blend_lcd16(srcA, srcR, srcG, srcB, dst[i], mask[i]); + } + } + + static inline void blit_row_lcd16_opaque(SkPMColor dst[], const uint16_t mask[], + SkColor src, int width, + SkPMColor opaqueDst) { + int srcR = SkColorGetR(src); + int srcG = SkColorGetG(src); + int srcB = SkColorGetB(src); + + for (int i = 0; i < width; i++) { + dst[i] = blend_lcd16_opaque(srcR, srcG, srcB, dst[i], mask[i], opaqueDst); + } + } + +#endif + +static bool blit_color(const SkPixmap& device, + const SkMask& mask, + const SkIRect& clip, + SkColor color) { + int x = clip.fLeft, + y = clip.fTop; + + if (device.colorType() == kN32_SkColorType && mask.fFormat == SkMask::kA8_Format) { + SkOpts::blit_mask_d32_a8(device.writable_addr32(x,y), device.rowBytes(), + (const SkAlpha*)mask.getAddr(x,y), mask.fRowBytes, + color, clip.width(), clip.height()); + return true; + } + + if (device.colorType() == kN32_SkColorType && mask.fFormat == SkMask::kLCD16_Format) { + auto dstRow = device.writable_addr32(x,y); + auto maskRow = (const uint16_t*)mask.getAddr(x,y); + + auto blit_row = blit_row_lcd16; + SkPMColor opaqueDst = 0; // ignored unless opaque + + if (0xff == SkColorGetA(color)) { + blit_row = blit_row_lcd16_opaque; + opaqueDst = SkPreMultiplyColor(color); + } + + for (int height = clip.height(); height --> 0; ) { + blit_row(dstRow, maskRow, color, clip.width(), opaqueDst); + + dstRow = (SkPMColor*) (( char*) dstRow + device.rowBytes()); + maskRow = (const uint16_t*)((const char*)maskRow + mask.fRowBytes); + } + return true; + } + + return false; +} + +/////////////////////////////////////////////////////////////////////////////// + +static void SkARGB32_Blit32(const SkPixmap& device, const SkMask& mask, + const SkIRect& clip, SkPMColor srcColor) { + U8CPU alpha = SkGetPackedA32(srcColor); + unsigned flags = SkBlitRow::kSrcPixelAlpha_Flag32; + if (alpha != 255) { + flags |= SkBlitRow::kGlobalAlpha_Flag32; + } + SkBlitRow::Proc32 proc = SkBlitRow::Factory32(flags); + + int x = clip.fLeft; + int y = clip.fTop; + int width = clip.width(); + int height = clip.height(); + + SkPMColor* dstRow = device.writable_addr32(x, y); + const SkPMColor* srcRow = reinterpret_cast(mask.getAddr8(x, y)); + + do { + proc(dstRow, srcRow, width, alpha); + dstRow = (SkPMColor*)((char*)dstRow + device.rowBytes()); + srcRow = (const SkPMColor*)((const char*)srcRow + mask.fRowBytes); + } while (--height != 0); +} + +////////////////////////////////////////////////////////////////////////////////////// + +SkARGB32_Blitter::SkARGB32_Blitter(const SkPixmap& device, const SkPaint& paint) + : INHERITED(device) { + SkColor color = paint.getColor(); + fColor = color; + + fSrcA = SkColorGetA(color); + unsigned scale = SkAlpha255To256(fSrcA); + fSrcR = SkAlphaMul(SkColorGetR(color), scale); + fSrcG = SkAlphaMul(SkColorGetG(color), scale); + fSrcB = SkAlphaMul(SkColorGetB(color), scale); + + fPMColor = SkPackARGB32(fSrcA, fSrcR, fSrcG, fSrcB); +} + +const SkPixmap* SkARGB32_Blitter::justAnOpaqueColor(uint32_t* value) { + if (255 == fSrcA) { + *value = fPMColor; + return &fDevice; + } + return nullptr; +} + +#if defined _WIN32 // disable warning : local variable used without having been initialized +#pragma warning ( push ) +#pragma warning ( disable : 4701 ) +#endif + +void SkARGB32_Blitter::blitH(int x, int y, int width) { + SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width()); + + uint32_t* device = fDevice.writable_addr32(x, y); + SkBlitRow::Color32(device, device, width, fPMColor); +} + +void SkARGB32_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], + const int16_t runs[]) { + if (fSrcA == 0) { + return; + } + + uint32_t color = fPMColor; + uint32_t* device = fDevice.writable_addr32(x, y); + unsigned opaqueMask = fSrcA; // if fSrcA is 0xFF, then we will catch the fast opaque case + + for (;;) { + int count = runs[0]; + SkASSERT(count >= 0); + if (count <= 0) { + return; + } + unsigned aa = antialias[0]; + if (aa) { + if ((opaqueMask & aa) == 255) { + SkOpts::memset32(device, color, count); + } else { + uint32_t sc = SkAlphaMulQ(color, SkAlpha255To256(aa)); + SkBlitRow::Color32(device, device, count, sc); + } + } + runs += count; + antialias += count; + device += count; + } +} + +void SkARGB32_Blitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { + uint32_t* device = fDevice.writable_addr32(x, y); + SkDEBUGCODE((void)fDevice.writable_addr32(x + 1, y);) + + device[0] = SkBlendARGB32(fPMColor, device[0], a0); + device[1] = SkBlendARGB32(fPMColor, device[1], a1); +} + +void SkARGB32_Blitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { + uint32_t* device = fDevice.writable_addr32(x, y); + SkDEBUGCODE((void)fDevice.writable_addr32(x, y + 1);) + + device[0] = SkBlendARGB32(fPMColor, device[0], a0); + device = (uint32_t*)((char*)device + fDevice.rowBytes()); + device[0] = SkBlendARGB32(fPMColor, device[0], a1); +} + +////////////////////////////////////////////////////////////////////////////////////// + +#define solid_8_pixels(mask, dst, color) \ + do { \ + if (mask & 0x80) dst[0] = color; \ + if (mask & 0x40) dst[1] = color; \ + if (mask & 0x20) dst[2] = color; \ + if (mask & 0x10) dst[3] = color; \ + if (mask & 0x08) dst[4] = color; \ + if (mask & 0x04) dst[5] = color; \ + if (mask & 0x02) dst[6] = color; \ + if (mask & 0x01) dst[7] = color; \ + } while (0) + +#define SK_BLITBWMASK_NAME SkARGB32_BlitBW +#define SK_BLITBWMASK_ARGS , SkPMColor color +#define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst, color) +#define SK_BLITBWMASK_GETADDR writable_addr32 +#define SK_BLITBWMASK_DEVTYPE uint32_t +#include "src/core/SkBlitBWMaskTemplate.h" + +#define blend_8_pixels(mask, dst, sc, dst_scale) \ + do { \ + if (mask & 0x80) { dst[0] = sc + SkAlphaMulQ(dst[0], dst_scale); } \ + if (mask & 0x40) { dst[1] = sc + SkAlphaMulQ(dst[1], dst_scale); } \ + if (mask & 0x20) { dst[2] = sc + SkAlphaMulQ(dst[2], dst_scale); } \ + if (mask & 0x10) { dst[3] = sc + SkAlphaMulQ(dst[3], dst_scale); } \ + if (mask & 0x08) { dst[4] = sc + SkAlphaMulQ(dst[4], dst_scale); } \ + if (mask & 0x04) { dst[5] = sc + SkAlphaMulQ(dst[5], dst_scale); } \ + if (mask & 0x02) { dst[6] = sc + SkAlphaMulQ(dst[6], dst_scale); } \ + if (mask & 0x01) { dst[7] = sc + SkAlphaMulQ(dst[7], dst_scale); } \ + } while (0) + +#define SK_BLITBWMASK_NAME SkARGB32_BlendBW +#define SK_BLITBWMASK_ARGS , uint32_t sc, unsigned dst_scale +#define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, sc, dst_scale) +#define SK_BLITBWMASK_GETADDR writable_addr32 +#define SK_BLITBWMASK_DEVTYPE uint32_t +#include "src/core/SkBlitBWMaskTemplate.h" + +void SkARGB32_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { + SkASSERT(mask.fBounds.contains(clip)); + SkASSERT(fSrcA != 0xFF); + + if (fSrcA == 0) { + return; + } + + if (blit_color(fDevice, mask, clip, fColor)) { + return; + } + + switch (mask.fFormat) { + case SkMask::kBW_Format: + SkARGB32_BlendBW(fDevice, mask, clip, fPMColor, SkAlpha255To256(255 - fSrcA)); + break; + case SkMask::kARGB32_Format: + SkARGB32_Blit32(fDevice, mask, clip, fPMColor); + break; + default: + SK_ABORT("Mask format not handled."); + } +} + +void SkARGB32_Opaque_Blitter::blitMask(const SkMask& mask, + const SkIRect& clip) { + SkASSERT(mask.fBounds.contains(clip)); + + if (blit_color(fDevice, mask, clip, fColor)) { + return; + } + + switch (mask.fFormat) { + case SkMask::kBW_Format: + SkARGB32_BlitBW(fDevice, mask, clip, fPMColor); + break; + case SkMask::kARGB32_Format: + SkARGB32_Blit32(fDevice, mask, clip, fPMColor); + break; + default: + SK_ABORT("Mask format not handled."); + } +} + +void SkARGB32_Opaque_Blitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { + uint32_t* device = fDevice.writable_addr32(x, y); + SkDEBUGCODE((void)fDevice.writable_addr32(x + 1, y);) + + device[0] = SkFastFourByteInterp(fPMColor, device[0], a0); + device[1] = SkFastFourByteInterp(fPMColor, device[1], a1); +} + +void SkARGB32_Opaque_Blitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { + uint32_t* device = fDevice.writable_addr32(x, y); + SkDEBUGCODE((void)fDevice.writable_addr32(x, y + 1);) + + device[0] = SkFastFourByteInterp(fPMColor, device[0], a0); + device = (uint32_t*)((char*)device + fDevice.rowBytes()); + device[0] = SkFastFourByteInterp(fPMColor, device[0], a1); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkARGB32_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { + if (alpha == 0 || fSrcA == 0) { + return; + } + + uint32_t* device = fDevice.writable_addr32(x, y); + uint32_t color = fPMColor; + + if (alpha != 255) { + color = SkAlphaMulQ(color, SkAlpha255To256(alpha)); + } + + unsigned dst_scale = SkAlpha255To256(255 - SkGetPackedA32(color)); + size_t rowBytes = fDevice.rowBytes(); + while (--height >= 0) { + device[0] = color + SkAlphaMulQ(device[0], dst_scale); + device = (uint32_t*)((char*)device + rowBytes); + } +} + +void SkARGB32_Blitter::blitRect(int x, int y, int width, int height) { + SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width() && y + height <= fDevice.height()); + + if (fSrcA == 0) { + return; + } + + uint32_t* device = fDevice.writable_addr32(x, y); + uint32_t color = fPMColor; + size_t rowBytes = fDevice.rowBytes(); + + if (SkGetPackedA32(fPMColor) == 0xFF) { + SkOpts::rect_memset32(device, color, width, rowBytes, height); + } else { + while (height --> 0) { + SkBlitRow::Color32(device, device, width, color); + device = (uint32_t*)((char*)device + rowBytes); + } + } +} + +#if defined _WIN32 +#pragma warning ( pop ) +#endif + +/////////////////////////////////////////////////////////////////////// + +void SkARGB32_Black_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], + const int16_t runs[]) { + uint32_t* device = fDevice.writable_addr32(x, y); + SkPMColor black = (SkPMColor)(SK_A32_MASK << SK_A32_SHIFT); + + for (;;) { + int count = runs[0]; + SkASSERT(count >= 0); + if (count <= 0) { + return; + } + unsigned aa = antialias[0]; + if (aa) { + if (aa == 255) { + SkOpts::memset32(device, black, count); + } else { + SkPMColor src = aa << SK_A32_SHIFT; + unsigned dst_scale = 256 - aa; + int n = count; + do { + --n; + device[n] = src + SkAlphaMulQ(device[n], dst_scale); + } while (n > 0); + } + } + runs += count; + antialias += count; + device += count; + } +} + +void SkARGB32_Black_Blitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { + uint32_t* device = fDevice.writable_addr32(x, y); + SkDEBUGCODE((void)fDevice.writable_addr32(x + 1, y);) + + device[0] = (a0 << SK_A32_SHIFT) + SkAlphaMulQ(device[0], 256 - a0); + device[1] = (a1 << SK_A32_SHIFT) + SkAlphaMulQ(device[1], 256 - a1); +} + +void SkARGB32_Black_Blitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { + uint32_t* device = fDevice.writable_addr32(x, y); + SkDEBUGCODE((void)fDevice.writable_addr32(x, y + 1);) + + device[0] = (a0 << SK_A32_SHIFT) + SkAlphaMulQ(device[0], 256 - a0); + device = (uint32_t*)((char*)device + fDevice.rowBytes()); + device[0] = (a1 << SK_A32_SHIFT) + SkAlphaMulQ(device[0], 256 - a1); +} + +/////////////////////////////////////////////////////////////////////////////// + +// Special version of SkBlitRow::Factory32 that knows we're in kSrc_Mode, +// instead of kSrcOver_Mode +static void blend_srcmode(SkPMColor* SK_RESTRICT device, + const SkPMColor* SK_RESTRICT span, + int count, U8CPU aa) { + int aa256 = SkAlpha255To256(aa); + for (int i = 0; i < count; ++i) { + device[i] = SkFourByteInterp256(span[i], device[i], aa256); + } +} + +SkARGB32_Shader_Blitter::SkARGB32_Shader_Blitter(const SkPixmap& device, + const SkPaint& paint, SkShaderBase::Context* shaderContext) + : INHERITED(device, paint, shaderContext) +{ + fBuffer = (SkPMColor*)sk_malloc_throw(device.width() * (sizeof(SkPMColor))); + + fXfermode = SkXfermode::Peek(paint.getBlendMode_or(SkBlendMode::kSrcOver)); + + int flags = 0; + if (!(shaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag)) { + flags |= SkBlitRow::kSrcPixelAlpha_Flag32; + } + // we call this on the output from the shader + fProc32 = SkBlitRow::Factory32(flags); + // we call this on the output from the shader + alpha from the aa buffer + fProc32Blend = SkBlitRow::Factory32(flags | SkBlitRow::kGlobalAlpha_Flag32); + + fShadeDirectlyIntoDevice = false; + if (fXfermode == nullptr) { + if (shaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag) { + fShadeDirectlyIntoDevice = true; + } + } else { + if (SkBlendMode::kSrc == paint.asBlendMode()) { + fShadeDirectlyIntoDevice = true; + fProc32Blend = blend_srcmode; + } + } + + fConstInY = SkToBool(shaderContext->getFlags() & SkShaderBase::kConstInY32_Flag); +} + +SkARGB32_Shader_Blitter::~SkARGB32_Shader_Blitter() { + sk_free(fBuffer); +} + +void SkARGB32_Shader_Blitter::blitH(int x, int y, int width) { + SkASSERT(x >= 0 && y >= 0 && x + width <= fDevice.width()); + + uint32_t* device = fDevice.writable_addr32(x, y); + + if (fShadeDirectlyIntoDevice) { + fShaderContext->shadeSpan(x, y, device, width); + } else { + SkPMColor* span = fBuffer; + fShaderContext->shadeSpan(x, y, span, width); + if (fXfermode) { + fXfermode->xfer32(device, span, width, nullptr); + } else { + fProc32(device, span, width, 255); + } + } +} + +void SkARGB32_Shader_Blitter::blitRect(int x, int y, int width, int height) { + SkASSERT(x >= 0 && y >= 0 && + x + width <= fDevice.width() && y + height <= fDevice.height()); + + uint32_t* device = fDevice.writable_addr32(x, y); + size_t deviceRB = fDevice.rowBytes(); + auto* shaderContext = fShaderContext; + SkPMColor* span = fBuffer; + + if (fConstInY) { + if (fShadeDirectlyIntoDevice) { + // shade the first row directly into the device + shaderContext->shadeSpan(x, y, device, width); + span = device; + while (--height > 0) { + device = (uint32_t*)((char*)device + deviceRB); + memcpy(device, span, width << 2); + } + } else { + shaderContext->shadeSpan(x, y, span, width); + SkXfermode* xfer = fXfermode; + if (xfer) { + do { + xfer->xfer32(device, span, width, nullptr); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } else { + SkBlitRow::Proc32 proc = fProc32; + do { + proc(device, span, width, 255); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } + } + return; + } + + if (fShadeDirectlyIntoDevice) { + do { + shaderContext->shadeSpan(x, y, device, width); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } else { + SkXfermode* xfer = fXfermode; + if (xfer) { + do { + shaderContext->shadeSpan(x, y, span, width); + xfer->xfer32(device, span, width, nullptr); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } else { + SkBlitRow::Proc32 proc = fProc32; + do { + shaderContext->shadeSpan(x, y, span, width); + proc(device, span, width, 255); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } + } +} + +void SkARGB32_Shader_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], + const int16_t runs[]) { + SkPMColor* span = fBuffer; + uint32_t* device = fDevice.writable_addr32(x, y); + auto* shaderContext = fShaderContext; + + if (fXfermode && !fShadeDirectlyIntoDevice) { + for (;;) { + SkXfermode* xfer = fXfermode; + + int count = *runs; + if (count <= 0) + break; + int aa = *antialias; + if (aa) { + shaderContext->shadeSpan(x, y, span, count); + if (aa == 255) { + xfer->xfer32(device, span, count, nullptr); + } else { + // count is almost always 1 + for (int i = count - 1; i >= 0; --i) { + xfer->xfer32(&device[i], &span[i], 1, antialias); + } + } + } + device += count; + runs += count; + antialias += count; + x += count; + } + } else if (fShadeDirectlyIntoDevice || + (shaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag)) { + for (;;) { + int count = *runs; + if (count <= 0) { + break; + } + int aa = *antialias; + if (aa) { + if (aa == 255) { + // cool, have the shader draw right into the device + shaderContext->shadeSpan(x, y, device, count); + } else { + shaderContext->shadeSpan(x, y, span, count); + fProc32Blend(device, span, count, aa); + } + } + device += count; + runs += count; + antialias += count; + x += count; + } + } else { + for (;;) { + int count = *runs; + if (count <= 0) { + break; + } + int aa = *antialias; + if (aa) { + shaderContext->shadeSpan(x, y, span, count); + if (aa == 255) { + fProc32(device, span, count, 255); + } else { + fProc32Blend(device, span, count, aa); + } + } + device += count; + runs += count; + antialias += count; + x += count; + } + } +} + +using U32 = skvx::Vec< 4, uint32_t>; +using U8x4 = skvx::Vec<16, uint8_t>; +using U8 = skvx::Vec< 4, uint8_t>; + +static void drive(SkPMColor* dst, const SkPMColor* src, const uint8_t* cov, int n, + U8x4 (*kernel)(U8x4,U8x4,U8x4)) { + + auto apply = [kernel](U32 dst, U32 src, U8 cov) -> U32 { + U8x4 cov_splat = skvx::shuffle<0,0,0,0, 1,1,1,1, 2,2,2,2, 3,3,3,3>(cov); + return skvx::bit_pun(kernel(skvx::bit_pun(dst), + skvx::bit_pun(src), + cov_splat)); + }; + while (n >= 4) { + apply(U32::Load(dst), U32::Load(src), U8::Load(cov)).store(dst); + dst += 4; + src += 4; + cov += 4; + n -= 4; + } + while (n --> 0) { + *dst = apply(U32{*dst}, U32{*src}, U8{*cov})[0]; + dst++; + src++; + cov++; + } +} + +static void blend_row_A8(SkPMColor* dst, const void* mask, const SkPMColor* src, int n) { + auto cov = (const uint8_t*)mask; + drive(dst, src, cov, n, [](U8x4 d, U8x4 s, U8x4 c) { + U8x4 s_aa = skvx::approx_scale(s, c), + alpha = skvx::shuffle<3,3,3,3, 7,7,7,7, 11,11,11,11, 15,15,15,15>(s_aa); + return s_aa + skvx::approx_scale(d, 255 - alpha); + }); +} + +static void blend_row_A8_opaque(SkPMColor* dst, const void* mask, const SkPMColor* src, int n) { + auto cov = (const uint8_t*)mask; + drive(dst, src, cov, n, [](U8x4 d, U8x4 s, U8x4 c) { + return skvx::div255( skvx::cast(s) * skvx::cast( c ) + + skvx::cast(d) * skvx::cast(255-c)); + }); +} + +static void blend_row_lcd16(SkPMColor* dst, const void* vmask, const SkPMColor* src, int n) { + auto src_alpha_blend = [](int s, int d, int sa, int m) { + return d + SkAlphaMul(s - SkAlphaMul(sa, d), m); + }; + + auto upscale_31_to_255 = [](int v) { + return (v << 3) | (v >> 2); + }; + + auto mask = (const uint16_t*)vmask; + for (int i = 0; i < n; ++i) { + uint16_t m = mask[i]; + if (0 == m) { + continue; + } + + SkPMColor s = src[i]; + SkPMColor d = dst[i]; + + int srcA = SkGetPackedA32(s); + int srcR = SkGetPackedR32(s); + int srcG = SkGetPackedG32(s); + int srcB = SkGetPackedB32(s); + + srcA += srcA >> 7; + + // We're ignoring the least significant bit of the green coverage channel here. + int maskR = SkGetPackedR16(m) >> (SK_R16_BITS - 5); + int maskG = SkGetPackedG16(m) >> (SK_G16_BITS - 5); + int maskB = SkGetPackedB16(m) >> (SK_B16_BITS - 5); + + // Scale up to 8-bit coverage to work with SkAlphaMul() in src_alpha_blend(). + maskR = upscale_31_to_255(maskR); + maskG = upscale_31_to_255(maskG); + maskB = upscale_31_to_255(maskB); + + // This LCD blit routine only works if the destination is opaque. + dst[i] = SkPackARGB32(0xFF, + src_alpha_blend(srcR, SkGetPackedR32(d), srcA, maskR), + src_alpha_blend(srcG, SkGetPackedG32(d), srcA, maskG), + src_alpha_blend(srcB, SkGetPackedB32(d), srcA, maskB)); + } +} + +static void blend_row_LCD16_opaque(SkPMColor* dst, const void* vmask, const SkPMColor* src, int n) { + auto mask = (const uint16_t*)vmask; + + for (int i = 0; i < n; ++i) { + uint16_t m = mask[i]; + if (0 == m) { + continue; + } + + SkPMColor s = src[i]; + SkPMColor d = dst[i]; + + int srcR = SkGetPackedR32(s); + int srcG = SkGetPackedG32(s); + int srcB = SkGetPackedB32(s); + + // We're ignoring the least significant bit of the green coverage channel here. + int maskR = SkGetPackedR16(m) >> (SK_R16_BITS - 5); + int maskG = SkGetPackedG16(m) >> (SK_G16_BITS - 5); + int maskB = SkGetPackedB16(m) >> (SK_B16_BITS - 5); + + // Now upscale them to 0..32, so we can use blend_32. + maskR = upscale_31_to_32(maskR); + maskG = upscale_31_to_32(maskG); + maskB = upscale_31_to_32(maskB); + + // This LCD blit routine only works if the destination is opaque. + dst[i] = SkPackARGB32(0xFF, + blend_32(srcR, SkGetPackedR32(d), maskR), + blend_32(srcG, SkGetPackedG32(d), maskG), + blend_32(srcB, SkGetPackedB32(d), maskB)); + } +} + +void SkARGB32_Shader_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { + // we only handle kA8 with an xfermode + if (fXfermode && (SkMask::kA8_Format != mask.fFormat)) { + this->INHERITED::blitMask(mask, clip); + return; + } + + SkASSERT(mask.fBounds.contains(clip)); + + void (*blend_row)(SkPMColor*, const void* mask, const SkPMColor*, int) = nullptr; + + if (!fXfermode) { + bool opaque = (fShaderContext->getFlags() & SkShaderBase::kOpaqueAlpha_Flag); + + if (mask.fFormat == SkMask::kA8_Format && opaque) { + blend_row = blend_row_A8_opaque; + } else if (mask.fFormat == SkMask::kA8_Format) { + blend_row = blend_row_A8; + } else if (mask.fFormat == SkMask::kLCD16_Format && opaque) { + blend_row = blend_row_LCD16_opaque; + } else if (mask.fFormat == SkMask::kLCD16_Format) { + blend_row = blend_row_lcd16; + } else { + this->INHERITED::blitMask(mask, clip); + return; + } + } + + const int x = clip.fLeft; + const int width = clip.width(); + int y = clip.fTop; + int height = clip.height(); + + char* dstRow = (char*)fDevice.writable_addr32(x, y); + const size_t dstRB = fDevice.rowBytes(); + const uint8_t* maskRow = (const uint8_t*)mask.getAddr(x, y); + const size_t maskRB = mask.fRowBytes; + + SkPMColor* span = fBuffer; + + if (fXfermode) { + SkASSERT(SkMask::kA8_Format == mask.fFormat); + SkXfermode* xfer = fXfermode; + do { + fShaderContext->shadeSpan(x, y, span, width); + xfer->xfer32(reinterpret_cast(dstRow), span, width, maskRow); + dstRow += dstRB; + maskRow += maskRB; + y += 1; + } while (--height > 0); + } else { + SkASSERT(blend_row); + do { + fShaderContext->shadeSpan(x, y, span, width); + blend_row(reinterpret_cast(dstRow), maskRow, span, width); + dstRow += dstRB; + maskRow += maskRB; + y += 1; + } while (--height > 0); + } +} + +void SkARGB32_Shader_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { + SkASSERT(x >= 0 && y >= 0 && y + height <= fDevice.height()); + + uint32_t* device = fDevice.writable_addr32(x, y); + size_t deviceRB = fDevice.rowBytes(); + + if (fConstInY) { + SkPMColor c; + fShaderContext->shadeSpan(x, y, &c, 1); + + if (fShadeDirectlyIntoDevice) { + if (255 == alpha) { + do { + *device = c; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } else { + do { + *device = SkFourByteInterp(c, *device, alpha); + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } + } else { + SkXfermode* xfer = fXfermode; + if (xfer) { + do { + xfer->xfer32(device, &c, 1, &alpha); + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } else { + SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend; + do { + proc(device, &c, 1, alpha); + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } + } + return; + } + + if (fShadeDirectlyIntoDevice) { + if (255 == alpha) { + do { + fShaderContext->shadeSpan(x, y, device, 1); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } else { + do { + SkPMColor c; + fShaderContext->shadeSpan(x, y, &c, 1); + *device = SkFourByteInterp(c, *device, alpha); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } + } else { + SkPMColor* span = fBuffer; + SkXfermode* xfer = fXfermode; + if (xfer) { + do { + fShaderContext->shadeSpan(x, y, span, 1); + xfer->xfer32(device, span, 1, &alpha); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } else { + SkBlitRow::Proc32 proc = (255 == alpha) ? fProc32 : fProc32Blend; + do { + fShaderContext->shadeSpan(x, y, span, 1); + proc(device, span, 1, alpha); + y += 1; + device = (uint32_t*)((char*)device + deviceRB); + } while (--height > 0); + } + } +} diff --git a/gfx/skia/skia/src/core/SkBlitter_Sprite.cpp b/gfx/skia/skia/src/core/SkBlitter_Sprite.cpp new file mode 100644 index 0000000000..ac38d1bbc9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlitter_Sprite.cpp @@ -0,0 +1,228 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColorSpace.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkCoreBlitters.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkOpts.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkSpriteBlitter.h" +#include "src/core/SkVMBlitter.h" + +extern bool gUseSkVMBlitter; +extern bool gSkForceRasterPipelineBlitter; + +SkSpriteBlitter::SkSpriteBlitter(const SkPixmap& source) + : fSource(source) {} + +bool SkSpriteBlitter::setup(const SkPixmap& dst, int left, int top, const SkPaint& paint) { + fDst = dst; + fLeft = left; + fTop = top; + fPaint = &paint; + return true; +} + +void SkSpriteBlitter::blitH(int x, int y, int width) { + SkDEBUGFAIL("how did we get here?"); + + // Fallback to blitRect. + this->blitRect(x, y, width, 1); +} + +void SkSpriteBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) { + SkDEBUGFAIL("how did we get here?"); + + // No fallback strategy. +} + +void SkSpriteBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + SkDEBUGFAIL("how did we get here?"); + + // Fall back to superclass if the code gets here in release mode. + INHERITED::blitV(x, y, height, alpha); +} + +void SkSpriteBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { + SkDEBUGFAIL("how did we get here?"); + + // Fall back to superclass if the code gets here in release mode. + INHERITED::blitMask(mask, clip); +} + +/////////////////////////////////////////////////////////////////////////////// + +class SkSpriteBlitter_Memcpy final : public SkSpriteBlitter { +public: + static bool Supports(const SkPixmap& dst, const SkPixmap& src, const SkPaint& paint) { + // the caller has already inspected the colorspace on src and dst + SkASSERT(0 == SkColorSpaceXformSteps(src,dst).flags.mask()); + + if (dst.colorType() != src.colorType()) { + return false; + } + if (paint.getMaskFilter() || paint.getColorFilter() || paint.getImageFilter()) { + return false; + } + if (0xFF != paint.getAlpha()) { + return false; + } + const auto mode = paint.asBlendMode(); + return mode == SkBlendMode::kSrc || (mode == SkBlendMode::kSrcOver && src.isOpaque()); + } + + SkSpriteBlitter_Memcpy(const SkPixmap& src) + : INHERITED(src) {} + + void blitRect(int x, int y, int width, int height) override { + SkASSERT(fDst.colorType() == fSource.colorType()); + SkASSERT(width > 0 && height > 0); + + char* dst = (char*)fDst.writable_addr(x, y); + const char* src = (const char*)fSource.addr(x - fLeft, y - fTop); + const size_t dstRB = fDst.rowBytes(); + const size_t srcRB = fSource.rowBytes(); + const size_t bytesToCopy = width << fSource.shiftPerPixel(); + + while (height --> 0) { + memcpy(dst, src, bytesToCopy); + dst += dstRB; + src += srcRB; + } + } + +private: + using INHERITED = SkSpriteBlitter; +}; + +class SkRasterPipelineSpriteBlitter : public SkSpriteBlitter { +public: + SkRasterPipelineSpriteBlitter(const SkPixmap& src, SkArenaAlloc* alloc, + sk_sp clipShader) + : INHERITED(src) + , fAlloc(alloc) + , fBlitter(nullptr) + , fSrcPtr{nullptr, 0} + , fClipShader(std::move(clipShader)) + {} + + bool setup(const SkPixmap& dst, int left, int top, const SkPaint& paint) override { + fDst = dst; + fLeft = left; + fTop = top; + fPaintColor = paint.getColor4f(); + + SkRasterPipeline p(fAlloc); + p.append_load(fSource.colorType(), &fSrcPtr); + + if (SkColorTypeIsAlphaOnly(fSource.colorType())) { + // The color for A8 images comes from the (sRGB) paint color. + p.append_set_rgb(fAlloc, fPaintColor); + p.append(SkRasterPipelineOp::premul); + } + if (auto dstCS = fDst.colorSpace()) { + auto srcCS = fSource.colorSpace(); + if (!srcCS || SkColorTypeIsAlphaOnly(fSource.colorType())) { + // We treat untagged images as sRGB. + // Alpha-only images get their r,g,b from the paint color, so they're also sRGB. + srcCS = sk_srgb_singleton(); + } + auto srcAT = fSource.isOpaque() ? kOpaque_SkAlphaType + : kPremul_SkAlphaType; + fAlloc->make(srcCS, srcAT, + dstCS, kPremul_SkAlphaType) + ->apply(&p); + } + if (fPaintColor.fA != 1.0f) { + p.append(SkRasterPipelineOp::scale_1_float, &fPaintColor.fA); + } + + bool is_opaque = fSource.isOpaque() && fPaintColor.fA == 1.0f; + fBlitter = SkCreateRasterPipelineBlitter(fDst, paint, p, is_opaque, fAlloc, fClipShader); + return fBlitter != nullptr; + } + + void blitRect(int x, int y, int width, int height) override { + fSrcPtr.stride = fSource.rowBytesAsPixels(); + + // We really want fSrcPtr.pixels = fSource.addr(-fLeft, -fTop) here, but that asserts. + // Instead we ask for addr(-fLeft+x, -fTop+y), then back up (x,y) manually. + // Representing bpp as a size_t keeps all this math in size_t instead of int, + // which could wrap around with large enough fSrcPtr.stride and y. + size_t bpp = fSource.info().bytesPerPixel(); + fSrcPtr.pixels = (char*)fSource.addr(-fLeft+x, -fTop+y) - bpp * x + - bpp * y * fSrcPtr.stride; + + fBlitter->blitRect(x,y,width,height); + } + +private: + SkArenaAlloc* fAlloc; + SkBlitter* fBlitter; + SkRasterPipeline_MemoryCtx fSrcPtr; + SkColor4f fPaintColor; + sk_sp fClipShader; + + using INHERITED = SkSpriteBlitter; +}; + +// returning null means the caller will call SkBlitter::Choose() and +// have wrapped the source bitmap inside a shader +SkBlitter* SkBlitter::ChooseSprite(const SkPixmap& dst, const SkPaint& paint, + const SkPixmap& source, int left, int top, + SkArenaAlloc* alloc, sk_sp clipShader) { + /* We currently ignore antialiasing and filtertype, meaning we will take our + special blitters regardless of these settings. Ignoring filtertype seems fine + since by definition there is no scale in the matrix. Ignoring antialiasing is + a bit of a hack, since we "could" pass in the fractional left/top for the bitmap, + and respect that by blending the edges of the bitmap against the device. To support + this we could either add more special blitters here, or detect antialiasing in the + paint and return null if it is set, forcing the client to take the slow shader case + (which does respect soft edges). + */ + SkASSERT(alloc != nullptr); + + if (gUseSkVMBlitter) { + return SkVMBlitter::Make(dst, paint, source,left,top, alloc, std::move(clipShader)); + } + + // TODO: in principle SkRasterPipelineSpriteBlitter could be made to handle this. + if (source.alphaType() == kUnpremul_SkAlphaType) { + return nullptr; + } + + SkSpriteBlitter* blitter = nullptr; + + if (gSkForceRasterPipelineBlitter) { + // Do not use any of these optimized memory blitters + } else if (0 == SkColorSpaceXformSteps(source,dst).flags.mask() && !clipShader) { + if (!blitter && SkSpriteBlitter_Memcpy::Supports(dst, source, paint)) { + blitter = alloc->make(source); + } + if (!blitter) { + switch (dst.colorType()) { + case kN32_SkColorType: + blitter = SkSpriteBlitter::ChooseL32(source, paint, alloc); + break; + default: + break; + } + } + } + if (!blitter && !paint.getMaskFilter()) { + blitter = alloc->make(source, alloc, clipShader); + } + + if (blitter && blitter->setup(dst, left,top, paint)) { + return blitter; + } + + return SkVMBlitter::Make(dst, paint, source,left,top, alloc, std::move(clipShader)); +} diff --git a/gfx/skia/skia/src/core/SkBlurMF.cpp b/gfx/skia/skia/src/core/SkBlurMF.cpp new file mode 100644 index 0000000000..c315d7e047 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlurMF.cpp @@ -0,0 +1,1680 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPathBuilder.h" +#include "include/core/SkRRect.h" +#include "include/core/SkStrokeRec.h" +#include "include/core/SkVertices.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkBlitter_A8.h" +#include "src/core/SkBlurMask.h" +#include "src/core/SkDrawBase.h" +#include "src/core/SkGpuBlurUtils.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRRectPriv.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkStringUtils.h" +#include "src/core/SkWriteBuffer.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrResourceProvider.h" +#include "src/gpu/ganesh/GrShaderCaps.h" +#include "src/gpu/ganesh/GrStyle.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/GrThreadSafeCache.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/SurfaceDrawContext.h" +#include "src/gpu/ganesh/effects/GrBlendFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrMatrixEffect.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/gpu/ganesh/geometry/GrStyledShape.h" +#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h" +#include "src/gpu/ganesh/glsl/GrGLSLProgramDataManager.h" +#include "src/gpu/ganesh/glsl/GrGLSLUniformHandler.h" +#endif // defined(SK_GANESH) + +using namespace skia_private; + +class SkBlurMaskFilterImpl : public SkMaskFilterBase { +public: + SkBlurMaskFilterImpl(SkScalar sigma, SkBlurStyle, bool respectCTM); + + // overrides from SkMaskFilter + SkMask::Format getFormat() const override; + bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&, + SkIPoint* margin) const override; + +#if defined(SK_GANESH) + bool canFilterMaskGPU(const GrStyledShape& shape, + const SkIRect& devSpaceShapeBounds, + const SkIRect& clipBounds, + const SkMatrix& ctm, + SkIRect* maskRect) const override; + bool directFilterMaskGPU(GrRecordingContext*, + skgpu::ganesh::SurfaceDrawContext*, + GrPaint&&, + const GrClip*, + const SkMatrix& viewMatrix, + const GrStyledShape&) const override; + GrSurfaceProxyView filterMaskGPU(GrRecordingContext*, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + const SkMatrix& ctm, + const SkIRect& maskRect) const override; +#endif + + void computeFastBounds(const SkRect&, SkRect*) const override; + bool asABlur(BlurRec*) const override; + + +protected: + FilterReturn filterRectsToNine(const SkRect[], int count, const SkMatrix&, + const SkIRect& clipBounds, + NinePatch*) const override; + + FilterReturn filterRRectToNine(const SkRRect&, const SkMatrix&, + const SkIRect& clipBounds, + NinePatch*) const override; + + bool filterRectMask(SkMask* dstM, const SkRect& r, const SkMatrix& matrix, + SkIPoint* margin, SkMask::CreateMode createMode) const; + bool filterRRectMask(SkMask* dstM, const SkRRect& r, const SkMatrix& matrix, + SkIPoint* margin, SkMask::CreateMode createMode) const; + + bool ignoreXform() const { return !fRespectCTM; } + +private: + SK_FLATTENABLE_HOOKS(SkBlurMaskFilterImpl) + // To avoid unseemly allocation requests (esp. for finite platforms like + // handset) we limit the radius so something manageable. (as opposed to + // a request like 10,000) + static const SkScalar kMAX_BLUR_SIGMA; + + SkScalar fSigma; + SkBlurStyle fBlurStyle; + bool fRespectCTM; + + SkBlurMaskFilterImpl(SkReadBuffer&); + void flatten(SkWriteBuffer&) const override; + + SkScalar computeXformedSigma(const SkMatrix& ctm) const { + SkScalar xformedSigma = this->ignoreXform() ? fSigma : ctm.mapRadius(fSigma); + return std::min(xformedSigma, kMAX_BLUR_SIGMA); + } + + friend class SkBlurMaskFilter; + + using INHERITED = SkMaskFilter; + friend void sk_register_blur_maskfilter_createproc(); +}; + +const SkScalar SkBlurMaskFilterImpl::kMAX_BLUR_SIGMA = SkIntToScalar(128); + +/////////////////////////////////////////////////////////////////////////////// + +SkBlurMaskFilterImpl::SkBlurMaskFilterImpl(SkScalar sigma, SkBlurStyle style, bool respectCTM) + : fSigma(sigma) + , fBlurStyle(style) + , fRespectCTM(respectCTM) { + SkASSERT(fSigma > 0); + SkASSERT((unsigned)style <= kLastEnum_SkBlurStyle); +} + +SkMask::Format SkBlurMaskFilterImpl::getFormat() const { + return SkMask::kA8_Format; +} + +bool SkBlurMaskFilterImpl::asABlur(BlurRec* rec) const { + if (this->ignoreXform()) { + return false; + } + + if (rec) { + rec->fSigma = fSigma; + rec->fStyle = fBlurStyle; + } + return true; +} + +bool SkBlurMaskFilterImpl::filterMask(SkMask* dst, const SkMask& src, + const SkMatrix& matrix, + SkIPoint* margin) const { + SkScalar sigma = this->computeXformedSigma(matrix); + return SkBlurMask::BoxBlur(dst, src, sigma, fBlurStyle, margin); +} + +bool SkBlurMaskFilterImpl::filterRectMask(SkMask* dst, const SkRect& r, + const SkMatrix& matrix, + SkIPoint* margin, SkMask::CreateMode createMode) const { + SkScalar sigma = computeXformedSigma(matrix); + + return SkBlurMask::BlurRect(sigma, dst, r, fBlurStyle, margin, createMode); +} + +bool SkBlurMaskFilterImpl::filterRRectMask(SkMask* dst, const SkRRect& r, + const SkMatrix& matrix, + SkIPoint* margin, SkMask::CreateMode createMode) const { + SkScalar sigma = computeXformedSigma(matrix); + + return SkBlurMask::BlurRRect(sigma, dst, r, fBlurStyle, margin, createMode); +} + +static bool prepare_to_draw_into_mask(const SkRect& bounds, SkMask* mask) { + SkASSERT(mask != nullptr); + + mask->fBounds = bounds.roundOut(); + mask->fRowBytes = SkAlign4(mask->fBounds.width()); + mask->fFormat = SkMask::kA8_Format; + const size_t size = mask->computeImageSize(); + mask->fImage = SkMask::AllocImage(size, SkMask::kZeroInit_Alloc); + if (nullptr == mask->fImage) { + return false; + } + return true; +} + +template bool draw_into_mask(SkMask* mask, const SkRect& bounds, Proc proc) { + if (!prepare_to_draw_into_mask(bounds, mask)) { + return false; + } + + const int dx = mask->fBounds.fLeft; + const int dy = mask->fBounds.fTop; + SkRasterClip rclip(mask->fBounds); + rclip.setRect(mask->fBounds.makeOffset(-dx, -dy)); + + SkASSERT(mask->fFormat == SkMask::kA8_Format); + auto info = SkImageInfo::MakeA8(mask->fBounds.width(), mask->fBounds.height()); + auto pm = SkPixmap(info, mask->fImage, mask->fRowBytes); + + SkMatrix ctm = SkMatrix::Translate(-SkIntToScalar(dx), -SkIntToScalar(dy)); + + SkMatrixProvider matrixProvider(ctm); + + SkDrawBase draw; + draw.fBlitterChooser = SkA8Blitter_Choose; + draw.fMatrixProvider = &matrixProvider; + draw.fDst = pm; + draw.fRC = &rclip; + + SkPaint paint; + paint.setAntiAlias(true); + + proc(draw, paint); + return true; +} + +static bool draw_rects_into_mask(const SkRect rects[], int count, SkMask* mask) { + return draw_into_mask(mask, rects[0], [&](SkDrawBase& draw, const SkPaint& paint) { + if (1 == count) { + draw.drawRect(rects[0], paint); + } else { + // todo: do I need a fast way to do this? + SkPath path = SkPathBuilder().addRect(rects[0]) + .addRect(rects[1]) + .setFillType(SkPathFillType::kEvenOdd) + .detach(); + draw.drawPath(path, paint); + } + }); +} + +static bool draw_rrect_into_mask(const SkRRect rrect, SkMask* mask) { + return draw_into_mask(mask, rrect.rect(), [&](SkDrawBase& draw, const SkPaint& paint) { + draw.drawRRect(rrect, paint); + }); +} + +static bool rect_exceeds(const SkRect& r, SkScalar v) { + return r.fLeft < -v || r.fTop < -v || r.fRight > v || r.fBottom > v || + r.width() > v || r.height() > v; +} + +#include "src/core/SkMaskCache.h" + +static SkCachedData* copy_mask_to_cacheddata(SkMask* mask) { + const size_t size = mask->computeTotalImageSize(); + SkCachedData* data = SkResourceCache::NewCachedData(size); + if (data) { + memcpy(data->writable_data(), mask->fImage, size); + SkMask::FreeImage(mask->fImage); + mask->fImage = (uint8_t*)data->data(); + } + return data; +} + +static SkCachedData* find_cached_rrect(SkMask* mask, SkScalar sigma, SkBlurStyle style, + const SkRRect& rrect) { + return SkMaskCache::FindAndRef(sigma, style, rrect, mask); +} + +static SkCachedData* add_cached_rrect(SkMask* mask, SkScalar sigma, SkBlurStyle style, + const SkRRect& rrect) { + SkCachedData* cache = copy_mask_to_cacheddata(mask); + if (cache) { + SkMaskCache::Add(sigma, style, rrect, *mask, cache); + } + return cache; +} + +static SkCachedData* find_cached_rects(SkMask* mask, SkScalar sigma, SkBlurStyle style, + const SkRect rects[], int count) { + return SkMaskCache::FindAndRef(sigma, style, rects, count, mask); +} + +static SkCachedData* add_cached_rects(SkMask* mask, SkScalar sigma, SkBlurStyle style, + const SkRect rects[], int count) { + SkCachedData* cache = copy_mask_to_cacheddata(mask); + if (cache) { + SkMaskCache::Add(sigma, style, rects, count, *mask, cache); + } + return cache; +} + +static const bool c_analyticBlurRRect{true}; + +SkMaskFilterBase::FilterReturn +SkBlurMaskFilterImpl::filterRRectToNine(const SkRRect& rrect, const SkMatrix& matrix, + const SkIRect& clipBounds, + NinePatch* patch) const { + SkASSERT(patch != nullptr); + switch (rrect.getType()) { + case SkRRect::kEmpty_Type: + // Nothing to draw. + return kFalse_FilterReturn; + + case SkRRect::kRect_Type: + // We should have caught this earlier. + SkASSERT(false); + [[fallthrough]]; + case SkRRect::kOval_Type: + // The nine patch special case does not handle ovals, and we + // already have code for rectangles. + return kUnimplemented_FilterReturn; + + // These three can take advantage of this fast path. + case SkRRect::kSimple_Type: + case SkRRect::kNinePatch_Type: + case SkRRect::kComplex_Type: + break; + } + + // TODO: report correct metrics for innerstyle, where we do not grow the + // total bounds, but we do need an inset the size of our blur-radius + if (kInner_SkBlurStyle == fBlurStyle) { + return kUnimplemented_FilterReturn; + } + + // TODO: take clipBounds into account to limit our coordinates up front + // for now, just skip too-large src rects (to take the old code path). + if (rect_exceeds(rrect.rect(), SkIntToScalar(32767))) { + return kUnimplemented_FilterReturn; + } + + SkIPoint margin; + SkMask srcM, dstM; + srcM.fBounds = rrect.rect().roundOut(); + srcM.fFormat = SkMask::kA8_Format; + srcM.fRowBytes = 0; + + bool filterResult = false; + if (c_analyticBlurRRect) { + // special case for fast round rect blur + // don't actually do the blur the first time, just compute the correct size + filterResult = this->filterRRectMask(&dstM, rrect, matrix, &margin, + SkMask::kJustComputeBounds_CreateMode); + } + + if (!filterResult) { + filterResult = this->filterMask(&dstM, srcM, matrix, &margin); + } + + if (!filterResult) { + return kFalse_FilterReturn; + } + + // Now figure out the appropriate width and height of the smaller round rectangle + // to stretch. It will take into account the larger radius per side as well as double + // the margin, to account for inner and outer blur. + const SkVector& UL = rrect.radii(SkRRect::kUpperLeft_Corner); + const SkVector& UR = rrect.radii(SkRRect::kUpperRight_Corner); + const SkVector& LR = rrect.radii(SkRRect::kLowerRight_Corner); + const SkVector& LL = rrect.radii(SkRRect::kLowerLeft_Corner); + + const SkScalar leftUnstretched = std::max(UL.fX, LL.fX) + SkIntToScalar(2 * margin.fX); + const SkScalar rightUnstretched = std::max(UR.fX, LR.fX) + SkIntToScalar(2 * margin.fX); + + // Extra space in the middle to ensure an unchanging piece for stretching. Use 3 to cover + // any fractional space on either side plus 1 for the part to stretch. + const SkScalar stretchSize = SkIntToScalar(3); + + const SkScalar totalSmallWidth = leftUnstretched + rightUnstretched + stretchSize; + if (totalSmallWidth >= rrect.rect().width()) { + // There is no valid piece to stretch. + return kUnimplemented_FilterReturn; + } + + const SkScalar topUnstretched = std::max(UL.fY, UR.fY) + SkIntToScalar(2 * margin.fY); + const SkScalar bottomUnstretched = std::max(LL.fY, LR.fY) + SkIntToScalar(2 * margin.fY); + + const SkScalar totalSmallHeight = topUnstretched + bottomUnstretched + stretchSize; + if (totalSmallHeight >= rrect.rect().height()) { + // There is no valid piece to stretch. + return kUnimplemented_FilterReturn; + } + + SkRect smallR = SkRect::MakeWH(totalSmallWidth, totalSmallHeight); + + SkRRect smallRR; + SkVector radii[4]; + radii[SkRRect::kUpperLeft_Corner] = UL; + radii[SkRRect::kUpperRight_Corner] = UR; + radii[SkRRect::kLowerRight_Corner] = LR; + radii[SkRRect::kLowerLeft_Corner] = LL; + smallRR.setRectRadii(smallR, radii); + + const SkScalar sigma = this->computeXformedSigma(matrix); + SkCachedData* cache = find_cached_rrect(&patch->fMask, sigma, fBlurStyle, smallRR); + if (!cache) { + bool analyticBlurWorked = false; + if (c_analyticBlurRRect) { + analyticBlurWorked = + this->filterRRectMask(&patch->fMask, smallRR, matrix, &margin, + SkMask::kComputeBoundsAndRenderImage_CreateMode); + } + + if (!analyticBlurWorked) { + if (!draw_rrect_into_mask(smallRR, &srcM)) { + return kFalse_FilterReturn; + } + + SkAutoMaskFreeImage amf(srcM.fImage); + + if (!this->filterMask(&patch->fMask, srcM, matrix, &margin)) { + return kFalse_FilterReturn; + } + } + cache = add_cached_rrect(&patch->fMask, sigma, fBlurStyle, smallRR); + } + + patch->fMask.fBounds.offsetTo(0, 0); + patch->fOuterRect = dstM.fBounds; + patch->fCenter.fX = SkScalarCeilToInt(leftUnstretched) + 1; + patch->fCenter.fY = SkScalarCeilToInt(topUnstretched) + 1; + SkASSERT(nullptr == patch->fCache); + patch->fCache = cache; // transfer ownership to patch + return kTrue_FilterReturn; +} + +// Use the faster analytic blur approach for ninepatch rects +static const bool c_analyticBlurNinepatch{true}; + +SkMaskFilterBase::FilterReturn +SkBlurMaskFilterImpl::filterRectsToNine(const SkRect rects[], int count, + const SkMatrix& matrix, + const SkIRect& clipBounds, + NinePatch* patch) const { + if (count < 1 || count > 2) { + return kUnimplemented_FilterReturn; + } + + // TODO: report correct metrics for innerstyle, where we do not grow the + // total bounds, but we do need an inset the size of our blur-radius + if (kInner_SkBlurStyle == fBlurStyle || kOuter_SkBlurStyle == fBlurStyle) { + return kUnimplemented_FilterReturn; + } + + // TODO: take clipBounds into account to limit our coordinates up front + // for now, just skip too-large src rects (to take the old code path). + if (rect_exceeds(rects[0], SkIntToScalar(32767))) { + return kUnimplemented_FilterReturn; + } + + SkIPoint margin; + SkMask srcM, dstM; + srcM.fBounds = rects[0].roundOut(); + srcM.fFormat = SkMask::kA8_Format; + srcM.fRowBytes = 0; + + bool filterResult = false; + if (count == 1 && c_analyticBlurNinepatch) { + // special case for fast rect blur + // don't actually do the blur the first time, just compute the correct size + filterResult = this->filterRectMask(&dstM, rects[0], matrix, &margin, + SkMask::kJustComputeBounds_CreateMode); + } else { + filterResult = this->filterMask(&dstM, srcM, matrix, &margin); + } + + if (!filterResult) { + return kFalse_FilterReturn; + } + + /* + * smallR is the smallest version of 'rect' that will still guarantee that + * we get the same blur results on all edges, plus 1 center row/col that is + * representative of the extendible/stretchable edges of the ninepatch. + * Since our actual edge may be fractional we inset 1 more to be sure we + * don't miss any interior blur. + * x is an added pixel of blur, and { and } are the (fractional) edge + * pixels from the original rect. + * + * x x { x x .... x x } x x + * + * Thus, in this case, we inset by a total of 5 (on each side) beginning + * with our outer-rect (dstM.fBounds) + */ + SkRect smallR[2]; + SkIPoint center; + + // +2 is from +1 for each edge (to account for possible fractional edges + int smallW = dstM.fBounds.width() - srcM.fBounds.width() + 2; + int smallH = dstM.fBounds.height() - srcM.fBounds.height() + 2; + SkIRect innerIR; + + if (1 == count) { + innerIR = srcM.fBounds; + center.set(smallW, smallH); + } else { + SkASSERT(2 == count); + rects[1].roundIn(&innerIR); + center.set(smallW + (innerIR.left() - srcM.fBounds.left()), + smallH + (innerIR.top() - srcM.fBounds.top())); + } + + // +1 so we get a clean, stretchable, center row/col + smallW += 1; + smallH += 1; + + // we want the inset amounts to be integral, so we don't change any + // fractional phase on the fRight or fBottom of our smallR. + const SkScalar dx = SkIntToScalar(innerIR.width() - smallW); + const SkScalar dy = SkIntToScalar(innerIR.height() - smallH); + if (dx < 0 || dy < 0) { + // we're too small, relative to our blur, to break into nine-patch, + // so we ask to have our normal filterMask() be called. + return kUnimplemented_FilterReturn; + } + + smallR[0].setLTRB(rects[0].left(), rects[0].top(), + rects[0].right() - dx, rects[0].bottom() - dy); + if (smallR[0].width() < 2 || smallR[0].height() < 2) { + return kUnimplemented_FilterReturn; + } + if (2 == count) { + smallR[1].setLTRB(rects[1].left(), rects[1].top(), + rects[1].right() - dx, rects[1].bottom() - dy); + SkASSERT(!smallR[1].isEmpty()); + } + + const SkScalar sigma = this->computeXformedSigma(matrix); + SkCachedData* cache = find_cached_rects(&patch->fMask, sigma, fBlurStyle, smallR, count); + if (!cache) { + if (count > 1 || !c_analyticBlurNinepatch) { + if (!draw_rects_into_mask(smallR, count, &srcM)) { + return kFalse_FilterReturn; + } + + SkAutoMaskFreeImage amf(srcM.fImage); + + if (!this->filterMask(&patch->fMask, srcM, matrix, &margin)) { + return kFalse_FilterReturn; + } + } else { + if (!this->filterRectMask(&patch->fMask, smallR[0], matrix, &margin, + SkMask::kComputeBoundsAndRenderImage_CreateMode)) { + return kFalse_FilterReturn; + } + } + cache = add_cached_rects(&patch->fMask, sigma, fBlurStyle, smallR, count); + } + patch->fMask.fBounds.offsetTo(0, 0); + patch->fOuterRect = dstM.fBounds; + patch->fCenter = center; + SkASSERT(nullptr == patch->fCache); + patch->fCache = cache; // transfer ownership to patch + return kTrue_FilterReturn; +} + +void SkBlurMaskFilterImpl::computeFastBounds(const SkRect& src, + SkRect* dst) const { + // TODO: if we're doing kInner blur, should we return a different outset? + // i.e. pad == 0 ? + + SkScalar pad = 3.0f * fSigma; + + dst->setLTRB(src.fLeft - pad, src.fTop - pad, + src.fRight + pad, src.fBottom + pad); +} + +sk_sp SkBlurMaskFilterImpl::CreateProc(SkReadBuffer& buffer) { + const SkScalar sigma = buffer.readScalar(); + SkBlurStyle style = buffer.read32LE(kLastEnum_SkBlurStyle); + + uint32_t flags = buffer.read32LE(0x3); // historically we only recorded 2 bits + bool respectCTM = !(flags & 1); // historically we stored ignoreCTM in low bit + + return SkMaskFilter::MakeBlur((SkBlurStyle)style, sigma, respectCTM); +} + +void SkBlurMaskFilterImpl::flatten(SkWriteBuffer& buffer) const { + buffer.writeScalar(fSigma); + buffer.writeUInt(fBlurStyle); + buffer.writeUInt(!fRespectCTM); // historically we recorded ignoreCTM +} + + +#if defined(SK_GANESH) && defined(SK_GANESH) + +/////////////////////////////////////////////////////////////////////////////// +// Circle Blur +/////////////////////////////////////////////////////////////////////////////// + +// Computes an unnormalized half kernel (right side). Returns the summation of all the half +// kernel values. +static float make_unnormalized_half_kernel(float* halfKernel, int halfKernelSize, float sigma) { + const float invSigma = 1.f / sigma; + const float b = -0.5f * invSigma * invSigma; + float tot = 0.0f; + // Compute half kernel values at half pixel steps out from the center. + float t = 0.5f; + for (int i = 0; i < halfKernelSize; ++i) { + float value = expf(t * t * b); + tot += value; + halfKernel[i] = value; + t += 1.f; + } + return tot; +} + +// Create a Gaussian half-kernel (right side) and a summed area table given a sigma and number +// of discrete steps. The half kernel is normalized to sum to 0.5. +static void make_half_kernel_and_summed_table(float* halfKernel, + float* summedHalfKernel, + int halfKernelSize, + float sigma) { + // The half kernel should sum to 0.5 not 1.0. + const float tot = 2.f * make_unnormalized_half_kernel(halfKernel, halfKernelSize, sigma); + float sum = 0.f; + for (int i = 0; i < halfKernelSize; ++i) { + halfKernel[i] /= tot; + sum += halfKernel[i]; + summedHalfKernel[i] = sum; + } +} + +// Applies the 1D half kernel vertically at points along the x axis to a circle centered at the +// origin with radius circleR. +void apply_kernel_in_y(float* results, + int numSteps, + float firstX, + float circleR, + int halfKernelSize, + const float* summedHalfKernelTable) { + float x = firstX; + for (int i = 0; i < numSteps; ++i, x += 1.f) { + if (x < -circleR || x > circleR) { + results[i] = 0; + continue; + } + float y = sqrtf(circleR * circleR - x * x); + // In the column at x we exit the circle at +y and -y + // The summed table entry j is actually reflects an offset of j + 0.5. + y -= 0.5f; + int yInt = SkScalarFloorToInt(y); + SkASSERT(yInt >= -1); + if (y < 0) { + results[i] = (y + 0.5f) * summedHalfKernelTable[0]; + } else if (yInt >= halfKernelSize - 1) { + results[i] = 0.5f; + } else { + float yFrac = y - yInt; + results[i] = (1.f - yFrac) * summedHalfKernelTable[yInt] + + yFrac * summedHalfKernelTable[yInt + 1]; + } + } +} + +// Apply a Gaussian at point (evalX, 0) to a circle centered at the origin with radius circleR. +// This relies on having a half kernel computed for the Gaussian and a table of applications of +// the half kernel in y to columns at (evalX - halfKernel, evalX - halfKernel + 1, ..., evalX + +// halfKernel) passed in as yKernelEvaluations. +static uint8_t eval_at(float evalX, + float circleR, + const float* halfKernel, + int halfKernelSize, + const float* yKernelEvaluations) { + float acc = 0; + + float x = evalX - halfKernelSize; + for (int i = 0; i < halfKernelSize; ++i, x += 1.f) { + if (x < -circleR || x > circleR) { + continue; + } + float verticalEval = yKernelEvaluations[i]; + acc += verticalEval * halfKernel[halfKernelSize - i - 1]; + } + for (int i = 0; i < halfKernelSize; ++i, x += 1.f) { + if (x < -circleR || x > circleR) { + continue; + } + float verticalEval = yKernelEvaluations[i + halfKernelSize]; + acc += verticalEval * halfKernel[i]; + } + // Since we applied a half kernel in y we multiply acc by 2 (the circle is symmetric about + // the x axis). + return SkUnitScalarClampToByte(2.f * acc); +} + +// This function creates a profile of a blurred circle. It does this by computing a kernel for +// half the Gaussian and a matching summed area table. The summed area table is used to compute +// an array of vertical applications of the half kernel to the circle along the x axis. The +// table of y evaluations has 2 * k + n entries where k is the size of the half kernel and n is +// the size of the profile being computed. Then for each of the n profile entries we walk out k +// steps in each horizontal direction multiplying the corresponding y evaluation by the half +// kernel entry and sum these values to compute the profile entry. +static void create_circle_profile(uint8_t* weights, + float sigma, + float circleR, + int profileTextureWidth) { + const int numSteps = profileTextureWidth; + + // The full kernel is 6 sigmas wide. + int halfKernelSize = SkScalarCeilToInt(6.0f * sigma); + // round up to next multiple of 2 and then divide by 2 + halfKernelSize = ((halfKernelSize + 1) & ~1) >> 1; + + // Number of x steps at which to apply kernel in y to cover all the profile samples in x. + int numYSteps = numSteps + 2 * halfKernelSize; + + AutoTArray bulkAlloc(halfKernelSize + halfKernelSize + numYSteps); + float* halfKernel = bulkAlloc.get(); + float* summedKernel = bulkAlloc.get() + halfKernelSize; + float* yEvals = bulkAlloc.get() + 2 * halfKernelSize; + make_half_kernel_and_summed_table(halfKernel, summedKernel, halfKernelSize, sigma); + + float firstX = -halfKernelSize + 0.5f; + apply_kernel_in_y(yEvals, numYSteps, firstX, circleR, halfKernelSize, summedKernel); + + for (int i = 0; i < numSteps - 1; ++i) { + float evalX = i + 0.5f; + weights[i] = eval_at(evalX, circleR, halfKernel, halfKernelSize, yEvals + i); + } + // Ensure the tail of the Gaussian goes to zero. + weights[numSteps - 1] = 0; +} + +static void create_half_plane_profile(uint8_t* profile, int profileWidth) { + SkASSERT(!(profileWidth & 0x1)); + // The full kernel is 6 sigmas wide. + float sigma = profileWidth / 6.f; + int halfKernelSize = profileWidth / 2; + + AutoTArray halfKernel(halfKernelSize); + + // The half kernel should sum to 0.5. + const float tot = 2.f * make_unnormalized_half_kernel(halfKernel.get(), halfKernelSize, sigma); + float sum = 0.f; + // Populate the profile from the right edge to the middle. + for (int i = 0; i < halfKernelSize; ++i) { + halfKernel[halfKernelSize - i - 1] /= tot; + sum += halfKernel[halfKernelSize - i - 1]; + profile[profileWidth - i - 1] = SkUnitScalarClampToByte(sum); + } + // Populate the profile from the middle to the left edge (by flipping the half kernel and + // continuing the summation). + for (int i = 0; i < halfKernelSize; ++i) { + sum += halfKernel[i]; + profile[halfKernelSize - i - 1] = SkUnitScalarClampToByte(sum); + } + // Ensure tail goes to 0. + profile[profileWidth - 1] = 0; +} + +static std::unique_ptr create_profile_effect(GrRecordingContext* rContext, + const SkRect& circle, + float sigma, + float* solidRadius, + float* textureRadius) { + float circleR = circle.width() / 2.0f; + if (!sk_float_isfinite(circleR) || circleR < SK_ScalarNearlyZero) { + return nullptr; + } + + auto threadSafeCache = rContext->priv().threadSafeCache(); + + // Profile textures are cached by the ratio of sigma to circle radius and by the size of the + // profile texture (binned by powers of 2). + SkScalar sigmaToCircleRRatio = sigma / circleR; + // When sigma is really small this becomes a equivalent to convolving a Gaussian with a + // half-plane. Similarly, in the extreme high ratio cases circle becomes a point WRT to the + // Guassian and the profile texture is a just a Gaussian evaluation. However, we haven't yet + // implemented this latter optimization. + sigmaToCircleRRatio = std::min(sigmaToCircleRRatio, 8.f); + SkFixed sigmaToCircleRRatioFixed; + static const SkScalar kHalfPlaneThreshold = 0.1f; + bool useHalfPlaneApprox = false; + if (sigmaToCircleRRatio <= kHalfPlaneThreshold) { + useHalfPlaneApprox = true; + sigmaToCircleRRatioFixed = 0; + *solidRadius = circleR - 3 * sigma; + *textureRadius = 6 * sigma; + } else { + // Convert to fixed point for the key. + sigmaToCircleRRatioFixed = SkScalarToFixed(sigmaToCircleRRatio); + // We shave off some bits to reduce the number of unique entries. We could probably + // shave off more than we do. + sigmaToCircleRRatioFixed &= ~0xff; + sigmaToCircleRRatio = SkFixedToScalar(sigmaToCircleRRatioFixed); + sigma = circleR * sigmaToCircleRRatio; + *solidRadius = 0; + *textureRadius = circleR + 3 * sigma; + } + + static constexpr int kProfileTextureWidth = 512; + // This would be kProfileTextureWidth/textureRadius if it weren't for the fact that we do + // the calculation of the profile coord in a coord space that has already been scaled by + // 1 / textureRadius. This is done to avoid overflow in length(). + SkMatrix texM = SkMatrix::Scale(kProfileTextureWidth, 1.f); + + static const skgpu::UniqueKey::Domain kDomain = skgpu::UniqueKey::GenerateDomain(); + skgpu::UniqueKey key; + skgpu::UniqueKey::Builder builder(&key, kDomain, 1, "1-D Circular Blur"); + builder[0] = sigmaToCircleRRatioFixed; + builder.finish(); + + GrSurfaceProxyView profileView = threadSafeCache->find(key); + if (profileView) { + SkASSERT(profileView.asTextureProxy()); + SkASSERT(profileView.origin() == kTopLeft_GrSurfaceOrigin); + return GrTextureEffect::Make(std::move(profileView), kPremul_SkAlphaType, texM); + } + + SkBitmap bm; + if (!bm.tryAllocPixels(SkImageInfo::MakeA8(kProfileTextureWidth, 1))) { + return nullptr; + } + + if (useHalfPlaneApprox) { + create_half_plane_profile(bm.getAddr8(0, 0), kProfileTextureWidth); + } else { + // Rescale params to the size of the texture we're creating. + SkScalar scale = kProfileTextureWidth / *textureRadius; + create_circle_profile( + bm.getAddr8(0, 0), sigma * scale, circleR * scale, kProfileTextureWidth); + } + bm.setImmutable(); + + profileView = std::get<0>(GrMakeUncachedBitmapProxyView(rContext, bm)); + if (!profileView) { + return nullptr; + } + + profileView = threadSafeCache->add(key, profileView); + return GrTextureEffect::Make(std::move(profileView), kPremul_SkAlphaType, texM); +} + +static std::unique_ptr make_circle_blur(GrRecordingContext* context, + const SkRect& circle, + float sigma) { + if (SkGpuBlurUtils::IsEffectivelyZeroSigma(sigma)) { + return nullptr; + } + + float solidRadius; + float textureRadius; + std::unique_ptr profile = + create_profile_effect(context, circle, sigma, &solidRadius, &textureRadius); + if (!profile) { + return nullptr; + } + + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform shader blurProfile;" + "uniform half4 circleData;" + + "half4 main(float2 xy) {" + // We just want to compute "(length(vec) - circleData.z + 0.5) * circleData.w" but need + // to rearrange to avoid passing large values to length() that would overflow. + "half2 vec = half2((sk_FragCoord.xy - circleData.xy) * circleData.w);" + "half dist = length(vec) + (0.5 - circleData.z) * circleData.w;" + "return blurProfile.eval(half2(dist, 0.5)).aaaa;" + "}" + ); + + SkV4 circleData = {circle.centerX(), circle.centerY(), solidRadius, 1.f / textureRadius}; + auto circleBlurFP = GrSkSLFP::Make(effect, "CircleBlur", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kCompatibleWithCoverageAsAlpha, + "blurProfile", GrSkSLFP::IgnoreOptFlags(std::move(profile)), + "circleData", circleData); + // Modulate blur with the input color. + return GrBlendFragmentProcessor::Make(std::move(circleBlurFP), + /*dst=*/nullptr); +} + +/////////////////////////////////////////////////////////////////////////////// +// Rect Blur +/////////////////////////////////////////////////////////////////////////////// + +static std::unique_ptr make_rect_integral_fp(GrRecordingContext* rContext, + float sixSigma) { + SkASSERT(!SkGpuBlurUtils::IsEffectivelyZeroSigma(sixSigma / 6.f)); + auto threadSafeCache = rContext->priv().threadSafeCache(); + + int width = SkGpuBlurUtils::CreateIntegralTable(sixSigma, nullptr); + + static const skgpu::UniqueKey::Domain kDomain = skgpu::UniqueKey::GenerateDomain(); + skgpu::UniqueKey key; + skgpu::UniqueKey::Builder builder(&key, kDomain, 1, "Rect Blur Mask"); + builder[0] = width; + builder.finish(); + + SkMatrix m = SkMatrix::Scale(width / sixSigma, 1.f); + + GrSurfaceProxyView view = threadSafeCache->find(key); + + if (view) { + SkASSERT(view.origin() == kTopLeft_GrSurfaceOrigin); + return GrTextureEffect::Make( + std::move(view), kPremul_SkAlphaType, m, GrSamplerState::Filter::kLinear); + } + + SkBitmap bitmap; + if (!SkGpuBlurUtils::CreateIntegralTable(sixSigma, &bitmap)) { + return {}; + } + + view = std::get<0>(GrMakeUncachedBitmapProxyView(rContext, bitmap)); + if (!view) { + return {}; + } + + view = threadSafeCache->add(key, view); + + SkASSERT(view.origin() == kTopLeft_GrSurfaceOrigin); + return GrTextureEffect::Make( + std::move(view), kPremul_SkAlphaType, m, GrSamplerState::Filter::kLinear); +} + +static std::unique_ptr make_rect_blur(GrRecordingContext* context, + const GrShaderCaps& caps, + const SkRect& srcRect, + const SkMatrix& viewMatrix, + float transformedSigma) { + SkASSERT(viewMatrix.preservesRightAngles()); + SkASSERT(srcRect.isSorted()); + + if (SkGpuBlurUtils::IsEffectivelyZeroSigma(transformedSigma)) { + // No need to blur the rect + return nullptr; + } + + SkMatrix invM; + SkRect rect; + if (viewMatrix.rectStaysRect()) { + invM = SkMatrix::I(); + // We can do everything in device space when the src rect projects to a rect in device space + SkAssertResult(viewMatrix.mapRect(&rect, srcRect)); + } else { + // The view matrix may scale, perhaps anisotropically. But we want to apply our device space + // "transformedSigma" to the delta of frag coord from the rect edges. Factor out the scaling + // to define a space that is purely rotation/translation from device space (and scale from + // src space) We'll meet in the middle: pre-scale the src rect to be in this space and then + // apply the inverse of the rotation/translation portion to the frag coord. + SkMatrix m; + SkSize scale; + if (!viewMatrix.decomposeScale(&scale, &m)) { + return nullptr; + } + if (!m.invert(&invM)) { + return nullptr; + } + rect = {srcRect.left() * scale.width(), + srcRect.top() * scale.height(), + srcRect.right() * scale.width(), + srcRect.bottom() * scale.height()}; + } + + if (!caps.fFloatIs32Bits) { + // We promote the math that gets us into the Gaussian space to full float when the rect + // coords are large. If we don't have full float then fail. We could probably clip the rect + // to an outset device bounds instead. + if (SkScalarAbs(rect.fLeft) > 16000.f || SkScalarAbs(rect.fTop) > 16000.f || + SkScalarAbs(rect.fRight) > 16000.f || SkScalarAbs(rect.fBottom) > 16000.f) { + return nullptr; + } + } + + const float sixSigma = 6 * transformedSigma; + std::unique_ptr integral = make_rect_integral_fp(context, sixSigma); + if (!integral) { + return nullptr; + } + + // In the fast variant we think of the midpoint of the integral texture as aligning with the + // closest rect edge both in x and y. To simplify texture coord calculation we inset the rect so + // that the edge of the inset rect corresponds to t = 0 in the texture. It actually simplifies + // things a bit in the !isFast case, too. + float threeSigma = sixSigma / 2; + SkRect insetRect = {rect.left() + threeSigma, + rect.top() + threeSigma, + rect.right() - threeSigma, + rect.bottom() - threeSigma}; + + // In our fast variant we find the nearest horizontal and vertical edges and for each do a + // lookup in the integral texture for each and multiply them. When the rect is less than 6 sigma + // wide then things aren't so simple and we have to consider both the left and right edge of the + // rectangle (and similar in y). + bool isFast = insetRect.isSorted(); + + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + // Effect that is a LUT for integral of normal distribution. The value at x:[0,6*sigma] is + // the integral from -inf to (3*sigma - x). I.e. x is mapped from [0, 6*sigma] to + // [3*sigma to -3*sigma]. The flip saves a reversal in the shader. + "uniform shader integral;" + + "uniform float4 rect;" + "uniform int isFast;" // specialized + + "half4 main(float2 pos) {" + "half xCoverage, yCoverage;" + "if (bool(isFast)) {" + // Get the smaller of the signed distance from the frag coord to the left and right + // edges and similar for y. + // The integral texture goes "backwards" (from 3*sigma to -3*sigma), So, the below + // computations align the left edge of the integral texture with the inset rect's + // edge extending outward 6 * sigma from the inset rect. + "half2 xy = max(half2(rect.LT - pos), half2(pos - rect.RB));" + "xCoverage = integral.eval(half2(xy.x, 0.5)).a;" + "yCoverage = integral.eval(half2(xy.y, 0.5)).a;" + "} else {" + // We just consider just the x direction here. In practice we compute x and y + // separately and multiply them together. + // We define our coord system so that the point at which we're evaluating a kernel + // defined by the normal distribution (K) at 0. In this coord system let L be left + // edge and R be the right edge of the rectangle. + // We can calculate C by integrating K with the half infinite ranges outside the + // L to R range and subtracting from 1: + // C = 1 - - + // K is symmetric about x=0 so: + // C = 1 - - + + // The integral texture goes "backwards" (from 3*sigma to -3*sigma) which is + // factored in to the below calculations. + // Also, our rect uniform was pre-inset by 3 sigma from the actual rect being + // blurred, also factored in. + "half4 rect = half4(half2(rect.LT - pos), half2(pos - rect.RB));" + "xCoverage = 1 - integral.eval(half2(rect.L, 0.5)).a" + "- integral.eval(half2(rect.R, 0.5)).a;" + "yCoverage = 1 - integral.eval(half2(rect.T, 0.5)).a" + "- integral.eval(half2(rect.B, 0.5)).a;" + "}" + "return half4(xCoverage * yCoverage);" + "}" + ); + + std::unique_ptr fp = + GrSkSLFP::Make(effect, "RectBlur", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kCompatibleWithCoverageAsAlpha, + "integral", GrSkSLFP::IgnoreOptFlags(std::move(integral)), + "rect", insetRect, + "isFast", GrSkSLFP::Specialize(isFast)); + // Modulate blur with the input color. + fp = GrBlendFragmentProcessor::Make(std::move(fp), + /*dst=*/nullptr); + if (!invM.isIdentity()) { + fp = GrMatrixEffect::Make(invM, std::move(fp)); + } + return GrFragmentProcessor::DeviceSpace(std::move(fp)); +} + +/////////////////////////////////////////////////////////////////////////////// +// RRect Blur +/////////////////////////////////////////////////////////////////////////////// + +static constexpr auto kBlurredRRectMaskOrigin = kTopLeft_GrSurfaceOrigin; + +static void make_blurred_rrect_key(skgpu::UniqueKey* key, + const SkRRect& rrectToDraw, + float xformedSigma) { + SkASSERT(!SkGpuBlurUtils::IsEffectivelyZeroSigma(xformedSigma)); + static const skgpu::UniqueKey::Domain kDomain = skgpu::UniqueKey::GenerateDomain(); + + skgpu::UniqueKey::Builder builder(key, kDomain, 9, "RoundRect Blur Mask"); + builder[0] = SkScalarCeilToInt(xformedSigma - 1 / 6.0f); + + int index = 1; + // TODO: this is overkill for _simple_ circular rrects + for (auto c : {SkRRect::kUpperLeft_Corner, + SkRRect::kUpperRight_Corner, + SkRRect::kLowerRight_Corner, + SkRRect::kLowerLeft_Corner}) { + SkASSERT(SkScalarIsInt(rrectToDraw.radii(c).fX) && SkScalarIsInt(rrectToDraw.radii(c).fY)); + builder[index++] = SkScalarCeilToInt(rrectToDraw.radii(c).fX); + builder[index++] = SkScalarCeilToInt(rrectToDraw.radii(c).fY); + } + builder.finish(); +} + +static bool fillin_view_on_gpu(GrDirectContext* dContext, + const GrSurfaceProxyView& lazyView, + sk_sp trampoline, + const SkRRect& rrectToDraw, + const SkISize& dimensions, + float xformedSigma) { +#if defined(SK_GANESH) + SkASSERT(!SkGpuBlurUtils::IsEffectivelyZeroSigma(xformedSigma)); + + // We cache blur masks. Use default surface props here so we can use the same cached mask + // regardless of the final dst surface. + SkSurfaceProps defaultSurfaceProps; + + std::unique_ptr sdc = + skgpu::ganesh::SurfaceDrawContext::MakeWithFallback(dContext, + GrColorType::kAlpha_8, + nullptr, + SkBackingFit::kExact, + dimensions, + defaultSurfaceProps, + 1, + GrMipmapped::kNo, + GrProtected::kNo, + kBlurredRRectMaskOrigin); + if (!sdc) { + return false; + } + + GrPaint paint; + + sdc->clear(SK_PMColor4fTRANSPARENT); + sdc->drawRRect(nullptr, + std::move(paint), + GrAA::kYes, + SkMatrix::I(), + rrectToDraw, + GrStyle::SimpleFill()); + + GrSurfaceProxyView srcView = sdc->readSurfaceView(); + SkASSERT(srcView.asTextureProxy()); + auto rtc2 = SkGpuBlurUtils::GaussianBlur(dContext, + std::move(srcView), + sdc->colorInfo().colorType(), + sdc->colorInfo().alphaType(), + nullptr, + SkIRect::MakeSize(dimensions), + SkIRect::MakeSize(dimensions), + xformedSigma, + xformedSigma, + SkTileMode::kClamp, + SkBackingFit::kExact); + if (!rtc2 || !rtc2->readSurfaceView()) { + return false; + } + + auto view = rtc2->readSurfaceView(); + SkASSERT(view.swizzle() == lazyView.swizzle()); + SkASSERT(view.origin() == lazyView.origin()); + trampoline->fProxy = view.asTextureProxyRef(); + + return true; +#else + return false; +#endif +} + +// Evaluate the vertical blur at the specified 'y' value given the location of the top of the +// rrect. +static uint8_t eval_V(float top, int y, const uint8_t* integral, int integralSize, float sixSigma) { + if (top < 0) { + return 0; // an empty column + } + + float fT = (top - y - 0.5f) * (integralSize / sixSigma); + if (fT < 0) { + return 255; + } else if (fT >= integralSize - 1) { + return 0; + } + + int lower = (int)fT; + float frac = fT - lower; + + SkASSERT(lower + 1 < integralSize); + + return integral[lower] * (1.0f - frac) + integral[lower + 1] * frac; +} + +// Apply a gaussian 'kernel' horizontally at the specified 'x', 'y' location. +static uint8_t eval_H(int x, + int y, + const std::vector& topVec, + const float* kernel, + int kernelSize, + const uint8_t* integral, + int integralSize, + float sixSigma) { + SkASSERT(0 <= x && x < (int)topVec.size()); + SkASSERT(kernelSize % 2); + + float accum = 0.0f; + + int xSampleLoc = x - (kernelSize / 2); + for (int i = 0; i < kernelSize; ++i, ++xSampleLoc) { + if (xSampleLoc < 0 || xSampleLoc >= (int)topVec.size()) { + continue; + } + + accum += kernel[i] * eval_V(topVec[xSampleLoc], y, integral, integralSize, sixSigma); + } + + return accum + 0.5f; +} + +// Create a cpu-side blurred-rrect mask that is close to the version the gpu would've produced. +// The match needs to be close bc the cpu- and gpu-generated version must be interchangeable. +static GrSurfaceProxyView create_mask_on_cpu(GrRecordingContext* rContext, + const SkRRect& rrectToDraw, + const SkISize& dimensions, + float xformedSigma) { + SkASSERT(!SkGpuBlurUtils::IsEffectivelyZeroSigma(xformedSigma)); + int radius = SkGpuBlurUtils::SigmaRadius(xformedSigma); + int kernelSize = 2 * radius + 1; + + SkASSERT(kernelSize % 2); + SkASSERT(dimensions.width() % 2); + SkASSERT(dimensions.height() % 2); + + SkVector radii = rrectToDraw.getSimpleRadii(); + SkASSERT(SkScalarNearlyEqual(radii.fX, radii.fY)); + + const int halfWidthPlus1 = (dimensions.width() / 2) + 1; + const int halfHeightPlus1 = (dimensions.height() / 2) + 1; + + std::unique_ptr kernel(new float[kernelSize]); + + SkGpuBlurUtils::Compute1DGaussianKernel(kernel.get(), xformedSigma, radius); + + SkBitmap integral; + if (!SkGpuBlurUtils::CreateIntegralTable(6 * xformedSigma, &integral)) { + return {}; + } + + SkBitmap result; + if (!result.tryAllocPixels(SkImageInfo::MakeA8(dimensions.width(), dimensions.height()))) { + return {}; + } + + std::vector topVec; + topVec.reserve(dimensions.width()); + for (int x = 0; x < dimensions.width(); ++x) { + if (x < rrectToDraw.rect().fLeft || x > rrectToDraw.rect().fRight) { + topVec.push_back(-1); + } else { + if (x + 0.5f < rrectToDraw.rect().fLeft + radii.fX) { // in the circular section + float xDist = rrectToDraw.rect().fLeft + radii.fX - x - 0.5f; + float h = sqrtf(radii.fX * radii.fX - xDist * xDist); + SkASSERT(0 <= h && h < radii.fY); + topVec.push_back(rrectToDraw.rect().fTop + radii.fX - h + 3 * xformedSigma); + } else { + topVec.push_back(rrectToDraw.rect().fTop + 3 * xformedSigma); + } + } + } + + for (int y = 0; y < halfHeightPlus1; ++y) { + uint8_t* scanline = result.getAddr8(0, y); + + for (int x = 0; x < halfWidthPlus1; ++x) { + scanline[x] = eval_H(x, + y, + topVec, + kernel.get(), + kernelSize, + integral.getAddr8(0, 0), + integral.width(), + 6 * xformedSigma); + scanline[dimensions.width() - x - 1] = scanline[x]; + } + + memcpy(result.getAddr8(0, dimensions.height() - y - 1), scanline, result.rowBytes()); + } + + result.setImmutable(); + + auto view = std::get<0>(GrMakeUncachedBitmapProxyView(rContext, result)); + if (!view) { + return {}; + } + + SkASSERT(view.origin() == kBlurredRRectMaskOrigin); + return view; +} + +static std::unique_ptr find_or_create_rrect_blur_mask_fp( + GrRecordingContext* rContext, + const SkRRect& rrectToDraw, + const SkISize& dimensions, + float xformedSigma) { + SkASSERT(!SkGpuBlurUtils::IsEffectivelyZeroSigma(xformedSigma)); + skgpu::UniqueKey key; + make_blurred_rrect_key(&key, rrectToDraw, xformedSigma); + + auto threadSafeCache = rContext->priv().threadSafeCache(); + + // It seems like we could omit this matrix and modify the shader code to not normalize + // the coords used to sample the texture effect. However, the "proxyDims" value in the + // shader is not always the actual the proxy dimensions. This is because 'dimensions' here + // was computed using integer corner radii as determined in + // SkComputeBlurredRRectParams whereas the shader code uses the float radius to compute + // 'proxyDims'. Why it draws correctly with these unequal values is a mystery for the ages. + auto m = SkMatrix::Scale(dimensions.width(), dimensions.height()); + + GrSurfaceProxyView view; + + if (GrDirectContext* dContext = rContext->asDirectContext()) { + // The gpu thread gets priority over the recording threads. If the gpu thread is first, + // it crams a lazy proxy into the cache and then fills it in later. + auto [lazyView, trampoline] = GrThreadSafeCache::CreateLazyView(dContext, + GrColorType::kAlpha_8, + dimensions, + kBlurredRRectMaskOrigin, + SkBackingFit::kExact); + if (!lazyView) { + return nullptr; + } + + view = threadSafeCache->findOrAdd(key, lazyView); + if (view != lazyView) { + SkASSERT(view.asTextureProxy()); + SkASSERT(view.origin() == kBlurredRRectMaskOrigin); + return GrTextureEffect::Make(std::move(view), kPremul_SkAlphaType, m); + } + + if (!fillin_view_on_gpu(dContext, + lazyView, + std::move(trampoline), + rrectToDraw, + dimensions, + xformedSigma)) { + // In this case something has gone disastrously wrong so set up to drop the draw + // that needed this resource and reduce future pollution of the cache. + threadSafeCache->remove(key); + return nullptr; + } + } else { + view = threadSafeCache->find(key); + if (view) { + SkASSERT(view.asTextureProxy()); + SkASSERT(view.origin() == kBlurredRRectMaskOrigin); + return GrTextureEffect::Make(std::move(view), kPremul_SkAlphaType, m); + } + + view = create_mask_on_cpu(rContext, rrectToDraw, dimensions, xformedSigma); + if (!view) { + return nullptr; + } + + view = threadSafeCache->add(key, view); + } + + SkASSERT(view.asTextureProxy()); + SkASSERT(view.origin() == kBlurredRRectMaskOrigin); + return GrTextureEffect::Make(std::move(view), kPremul_SkAlphaType, m); +} + +static std::unique_ptr make_rrect_blur(GrRecordingContext* context, + float sigma, + float xformedSigma, + const SkRRect& srcRRect, + const SkRRect& devRRect) { + // Should've been caught up-stream +#ifdef SK_DEBUG + SkASSERTF(!SkRRectPriv::IsCircle(devRRect), + "Unexpected circle. %d\n\t%s\n\t%s", + SkRRectPriv::IsCircle(srcRRect), + srcRRect.dumpToString(true).c_str(), + devRRect.dumpToString(true).c_str()); + SkASSERTF(!devRRect.isRect(), + "Unexpected rect. %d\n\t%s\n\t%s", + srcRRect.isRect(), + srcRRect.dumpToString(true).c_str(), + devRRect.dumpToString(true).c_str()); +#endif + + // TODO: loosen this up + if (!SkRRectPriv::IsSimpleCircular(devRRect)) { + return nullptr; + } + + if (SkGpuBlurUtils::IsEffectivelyZeroSigma(xformedSigma)) { + return nullptr; + } + + // Make sure we can successfully ninepatch this rrect -- the blur sigma has to be sufficiently + // small relative to both the size of the corner radius and the width (and height) of the rrect. + SkRRect rrectToDraw; + SkISize dimensions; + SkScalar ignored[SkGpuBlurUtils::kBlurRRectMaxDivisions]; + + bool ninePatchable = SkGpuBlurUtils::ComputeBlurredRRectParams(srcRRect, + devRRect, + sigma, + xformedSigma, + &rrectToDraw, + &dimensions, + ignored, + ignored, + ignored, + ignored); + if (!ninePatchable) { + return nullptr; + } + + std::unique_ptr maskFP = + find_or_create_rrect_blur_mask_fp(context, rrectToDraw, dimensions, xformedSigma); + if (!maskFP) { + return nullptr; + } + + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform shader ninePatchFP;" + + "uniform half cornerRadius;" + "uniform float4 proxyRect;" + "uniform half blurRadius;" + + "half4 main(float2 xy) {" + // Warp the fragment position to the appropriate part of the 9-patch blur texture by + // snipping out the middle section of the proxy rect. + "float2 translatedFragPosFloat = sk_FragCoord.xy - proxyRect.LT;" + "float2 proxyCenter = (proxyRect.RB - proxyRect.LT) * 0.5;" + "half edgeSize = 2.0 * blurRadius + cornerRadius + 0.5;" + + // Position the fragment so that (0, 0) marks the center of the proxy rectangle. + // Negative coordinates are on the left/top side and positive numbers are on the + // right/bottom. + "translatedFragPosFloat -= proxyCenter;" + + // Temporarily strip off the fragment's sign. x/y are now strictly increasing as we + // move away from the center. + "half2 fragDirection = half2(sign(translatedFragPosFloat));" + "translatedFragPosFloat = abs(translatedFragPosFloat);" + + // Our goal is to snip out the "middle section" of the proxy rect (everything but the + // edge). We've repositioned our fragment position so that (0, 0) is the centerpoint + // and x/y are always positive, so we can subtract here and interpret negative results + // as being within the middle section. + "half2 translatedFragPosHalf = half2(translatedFragPosFloat - (proxyCenter - edgeSize));" + + // Remove the middle section by clamping to zero. + "translatedFragPosHalf = max(translatedFragPosHalf, 0);" + + // Reapply the fragment's sign, so that negative coordinates once again mean left/top + // side and positive means bottom/right side. + "translatedFragPosHalf *= fragDirection;" + + // Offset the fragment so that (0, 0) marks the upper-left again, instead of the center + // point. + "translatedFragPosHalf += half2(edgeSize);" + + "half2 proxyDims = half2(2.0 * edgeSize);" + "half2 texCoord = translatedFragPosHalf / proxyDims;" + + "return ninePatchFP.eval(texCoord).aaaa;" + "}" + ); + + float cornerRadius = SkRRectPriv::GetSimpleRadii(devRRect).fX; + float blurRadius = 3.f * SkScalarCeilToScalar(xformedSigma - 1 / 6.0f); + SkRect proxyRect = devRRect.getBounds().makeOutset(blurRadius, blurRadius); + + auto rrectBlurFP = GrSkSLFP::Make(effect, "RRectBlur", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kCompatibleWithCoverageAsAlpha, + "ninePatchFP", GrSkSLFP::IgnoreOptFlags(std::move(maskFP)), + "cornerRadius", cornerRadius, + "proxyRect", proxyRect, + "blurRadius", blurRadius); + // Modulate blur with the input color. + return GrBlendFragmentProcessor::Make(std::move(rrectBlurFP), + /*dst=*/nullptr); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkBlurMaskFilterImpl::directFilterMaskGPU(GrRecordingContext* context, + skgpu::ganesh::SurfaceDrawContext* sdc, + GrPaint&& paint, + const GrClip* clip, + const SkMatrix& viewMatrix, + const GrStyledShape& shape) const { + SkASSERT(sdc); + + if (fBlurStyle != kNormal_SkBlurStyle) { + return false; + } + + // TODO: we could handle blurred stroked circles + if (!shape.style().isSimpleFill()) { + return false; + } + + SkScalar xformedSigma = this->computeXformedSigma(viewMatrix); + if (SkGpuBlurUtils::IsEffectivelyZeroSigma(xformedSigma)) { + sdc->drawShape(clip, std::move(paint), GrAA::kYes, viewMatrix, GrStyledShape(shape)); + return true; + } + + SkRRect srcRRect; + bool inverted; + if (!shape.asRRect(&srcRRect, nullptr, nullptr, &inverted) || inverted) { + return false; + } + + std::unique_ptr fp; + + SkRRect devRRect; + bool devRRectIsValid = srcRRect.transform(viewMatrix, &devRRect); + + bool devRRectIsCircle = devRRectIsValid && SkRRectPriv::IsCircle(devRRect); + + bool canBeRect = srcRRect.isRect() && viewMatrix.preservesRightAngles(); + bool canBeCircle = (SkRRectPriv::IsCircle(srcRRect) && viewMatrix.isSimilarity()) || + devRRectIsCircle; + + if (canBeRect || canBeCircle) { + if (canBeRect) { + fp = make_rect_blur(context, *context->priv().caps()->shaderCaps(), + srcRRect.rect(), viewMatrix, xformedSigma); + } else { + SkRect devBounds; + if (devRRectIsCircle) { + devBounds = devRRect.getBounds(); + } else { + SkPoint center = {srcRRect.getBounds().centerX(), srcRRect.getBounds().centerY()}; + viewMatrix.mapPoints(¢er, 1); + SkScalar radius = viewMatrix.mapVector(0, srcRRect.width()/2.f).length(); + devBounds = {center.x() - radius, + center.y() - radius, + center.x() + radius, + center.y() + radius}; + } + fp = make_circle_blur(context, devBounds, xformedSigma); + } + + if (!fp) { + return false; + } + + SkRect srcProxyRect = srcRRect.rect(); + // Determine how much to outset the src rect to ensure we hit pixels within three sigma. + SkScalar outsetX = 3.0f*xformedSigma; + SkScalar outsetY = 3.0f*xformedSigma; + if (viewMatrix.isScaleTranslate()) { + outsetX /= SkScalarAbs(viewMatrix.getScaleX()); + outsetY /= SkScalarAbs(viewMatrix.getScaleY()); + } else { + SkSize scale; + if (!viewMatrix.decomposeScale(&scale, nullptr)) { + return false; + } + outsetX /= scale.width(); + outsetY /= scale.height(); + } + srcProxyRect.outset(outsetX, outsetY); + + paint.setCoverageFragmentProcessor(std::move(fp)); + sdc->drawRect(clip, std::move(paint), GrAA::kNo, viewMatrix, srcProxyRect); + return true; + } + if (!viewMatrix.isScaleTranslate()) { + return false; + } + if (!devRRectIsValid || !SkRRectPriv::AllCornersCircular(devRRect)) { + return false; + } + + fp = make_rrect_blur(context, fSigma, xformedSigma, srcRRect, devRRect); + if (!fp) { + return false; + } + + if (!this->ignoreXform()) { + SkRect srcProxyRect = srcRRect.rect(); + srcProxyRect.outset(3.0f*fSigma, 3.0f*fSigma); + paint.setCoverageFragmentProcessor(std::move(fp)); + sdc->drawRect(clip, std::move(paint), GrAA::kNo, viewMatrix, srcProxyRect); + } else { + SkMatrix inverse; + if (!viewMatrix.invert(&inverse)) { + return false; + } + + SkIRect proxyBounds; + float extra=3.f*SkScalarCeilToScalar(xformedSigma-1/6.0f); + devRRect.rect().makeOutset(extra, extra).roundOut(&proxyBounds); + + paint.setCoverageFragmentProcessor(std::move(fp)); + sdc->fillPixelsWithLocalMatrix(clip, std::move(paint), proxyBounds, inverse); + } + + return true; +} + +bool SkBlurMaskFilterImpl::canFilterMaskGPU(const GrStyledShape& shape, + const SkIRect& devSpaceShapeBounds, + const SkIRect& clipBounds, + const SkMatrix& ctm, + SkIRect* maskRect) const { + SkScalar xformedSigma = this->computeXformedSigma(ctm); + if (SkGpuBlurUtils::IsEffectivelyZeroSigma(xformedSigma)) { + *maskRect = devSpaceShapeBounds; + return maskRect->intersect(clipBounds); + } + + if (maskRect) { + float sigma3 = 3 * SkScalarToFloat(xformedSigma); + + // Outset srcRect and clipRect by 3 * sigma, to compute affected blur area. + SkIRect clipRect = clipBounds.makeOutset(sigma3, sigma3); + SkIRect srcRect = devSpaceShapeBounds.makeOutset(sigma3, sigma3); + + if (!srcRect.intersect(clipRect)) { + srcRect.setEmpty(); + } + *maskRect = srcRect; + } + + // We prefer to blur paths with small blur radii on the CPU. + static const SkScalar kMIN_GPU_BLUR_SIZE = SkIntToScalar(64); + static const SkScalar kMIN_GPU_BLUR_SIGMA = SkIntToScalar(32); + + if (devSpaceShapeBounds.width() <= kMIN_GPU_BLUR_SIZE && + devSpaceShapeBounds.height() <= kMIN_GPU_BLUR_SIZE && + xformedSigma <= kMIN_GPU_BLUR_SIGMA) { + return false; + } + + return true; +} + +GrSurfaceProxyView SkBlurMaskFilterImpl::filterMaskGPU(GrRecordingContext* context, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + const SkMatrix& ctm, + const SkIRect& maskRect) const { + // 'maskRect' isn't snapped to the UL corner but the mask in 'src' is. + const SkIRect clipRect = SkIRect::MakeWH(maskRect.width(), maskRect.height()); + + SkScalar xformedSigma = this->computeXformedSigma(ctm); + + // If we're doing a normal blur, we can clobber the pathTexture in the + // gaussianBlur. Otherwise, we need to save it for later compositing. + bool isNormalBlur = (kNormal_SkBlurStyle == fBlurStyle); + auto srcBounds = SkIRect::MakeSize(srcView.proxy()->dimensions()); + auto surfaceDrawContext = SkGpuBlurUtils::GaussianBlur(context, + srcView, + srcColorType, + srcAlphaType, + nullptr, + clipRect, + srcBounds, + xformedSigma, + xformedSigma, + SkTileMode::kClamp); + if (!surfaceDrawContext || !surfaceDrawContext->asTextureProxy()) { + return {}; + } + + if (!isNormalBlur) { + GrPaint paint; + // Blend pathTexture over blurTexture. + paint.setCoverageFragmentProcessor(GrTextureEffect::Make(std::move(srcView), srcAlphaType)); + if (kInner_SkBlurStyle == fBlurStyle) { + // inner: dst = dst * src + paint.setCoverageSetOpXPFactory(SkRegion::kIntersect_Op); + } else if (kSolid_SkBlurStyle == fBlurStyle) { + // solid: dst = src + dst - src * dst + // = src + (1 - src) * dst + paint.setCoverageSetOpXPFactory(SkRegion::kUnion_Op); + } else if (kOuter_SkBlurStyle == fBlurStyle) { + // outer: dst = dst * (1 - src) + // = 0 * src + (1 - src) * dst + paint.setCoverageSetOpXPFactory(SkRegion::kDifference_Op); + } else { + paint.setCoverageSetOpXPFactory(SkRegion::kReplace_Op); + } + + surfaceDrawContext->fillPixelsWithLocalMatrix(nullptr, std::move(paint), clipRect, + SkMatrix::I()); + } + + return surfaceDrawContext->readSurfaceView(); +} + +#endif // defined(SK_GANESH) && defined(SK_GANESH) + +void sk_register_blur_maskfilter_createproc() { SK_REGISTER_FLATTENABLE(SkBlurMaskFilterImpl); } + +sk_sp SkMaskFilter::MakeBlur(SkBlurStyle style, SkScalar sigma, bool respectCTM) { + if (SkScalarIsFinite(sigma) && sigma > 0) { + return sk_sp(new SkBlurMaskFilterImpl(sigma, style, respectCTM)); + } + return nullptr; +} diff --git a/gfx/skia/skia/src/core/SkBlurMask.cpp b/gfx/skia/skia/src/core/SkBlurMask.cpp new file mode 100644 index 0000000000..faeae36e71 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlurMask.cpp @@ -0,0 +1,661 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkBlurMask.h" + +#include "include/core/SkColorPriv.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkEndian.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkMaskBlurFilter.h" + +using namespace skia_private; + +// This constant approximates the scaling done in the software path's +// "high quality" mode, in SkBlurMask::Blur() (1 / sqrt(3)). +// IMHO, it actually should be 1: we blur "less" than we should do +// according to the CSS and canvas specs, simply because Safari does the same. +// Firefox used to do the same too, until 4.0 where they fixed it. So at some +// point we should probably get rid of these scaling constants and rebaseline +// all the blur tests. +static const SkScalar kBLUR_SIGMA_SCALE = 0.57735f; + +SkScalar SkBlurMask::ConvertRadiusToSigma(SkScalar radius) { + return radius > 0 ? kBLUR_SIGMA_SCALE * radius + 0.5f : 0.0f; +} + +SkScalar SkBlurMask::ConvertSigmaToRadius(SkScalar sigma) { + return sigma > 0.5f ? (sigma - 0.5f) / kBLUR_SIGMA_SCALE : 0.0f; +} + + +template +static void merge_src_with_blur(uint8_t dst[], int dstRB, + AlphaIter src, int srcRB, + const uint8_t blur[], int blurRB, + int sw, int sh) { + dstRB -= sw; + blurRB -= sw; + while (--sh >= 0) { + AlphaIter rowSrc(src); + for (int x = sw - 1; x >= 0; --x) { + *dst = SkToU8(SkAlphaMul(*blur, SkAlpha255To256(*rowSrc))); + ++dst; + ++rowSrc; + ++blur; + } + dst += dstRB; + src >>= srcRB; + blur += blurRB; + } +} + +template +static void clamp_solid_with_orig(uint8_t dst[], int dstRowBytes, + AlphaIter src, int srcRowBytes, + int sw, int sh) { + int x; + while (--sh >= 0) { + AlphaIter rowSrc(src); + for (x = sw - 1; x >= 0; --x) { + int s = *rowSrc; + int d = *dst; + *dst = SkToU8(s + d - SkMulDiv255Round(s, d)); + ++dst; + ++rowSrc; + } + dst += dstRowBytes - sw; + src >>= srcRowBytes; + } +} + +template +static void clamp_outer_with_orig(uint8_t dst[], int dstRowBytes, + AlphaIter src, int srcRowBytes, + int sw, int sh) { + int x; + while (--sh >= 0) { + AlphaIter rowSrc(src); + for (x = sw - 1; x >= 0; --x) { + int srcValue = *rowSrc; + if (srcValue) { + *dst = SkToU8(SkAlphaMul(*dst, SkAlpha255To256(255 - srcValue))); + } + ++dst; + ++rowSrc; + } + dst += dstRowBytes - sw; + src >>= srcRowBytes; + } +} +/////////////////////////////////////////////////////////////////////////////// + +// we use a local function to wrap the class static method to work around +// a bug in gcc98 +void SkMask_FreeImage(uint8_t* image); +void SkMask_FreeImage(uint8_t* image) { + SkMask::FreeImage(image); +} + +bool SkBlurMask::BoxBlur(SkMask* dst, const SkMask& src, SkScalar sigma, SkBlurStyle style, + SkIPoint* margin) { + if (src.fFormat != SkMask::kBW_Format && + src.fFormat != SkMask::kA8_Format && + src.fFormat != SkMask::kARGB32_Format && + src.fFormat != SkMask::kLCD16_Format) + { + return false; + } + + SkMaskBlurFilter blurFilter{sigma, sigma}; + if (blurFilter.hasNoBlur()) { + // If there is no effective blur most styles will just produce the original mask. + // However, kOuter_SkBlurStyle will produce an empty mask. + if (style == kOuter_SkBlurStyle) { + dst->fImage = nullptr; + dst->fBounds = SkIRect::MakeEmpty(); + dst->fRowBytes = dst->fBounds.width(); + dst->fFormat = SkMask::kA8_Format; + if (margin != nullptr) { + // This filter will disregard the src.fImage completely. + // The margin is actually {-(src.fBounds.width() / 2), -(src.fBounds.height() / 2)} + // but it is not clear if callers will fall over with negative margins. + *margin = SkIPoint{0,0}; + } + return true; + } + return false; + } + const SkIPoint border = blurFilter.blur(src, dst); + // If src.fImage is null, then this call is only to calculate the border. + if (src.fImage != nullptr && dst->fImage == nullptr) { + return false; + } + + if (margin != nullptr) { + *margin = border; + } + + if (src.fImage == nullptr) { + if (style == kInner_SkBlurStyle) { + dst->fBounds = src.fBounds; // restore trimmed bounds + dst->fRowBytes = dst->fBounds.width(); + } + return true; + } + + switch (style) { + case kNormal_SkBlurStyle: + break; + case kSolid_SkBlurStyle: { + auto dstStart = &dst->fImage[border.x() + border.y() * dst->fRowBytes]; + switch (src.fFormat) { + case SkMask::kBW_Format: + clamp_solid_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(src.fImage, 0), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + break; + case SkMask::kA8_Format: + clamp_solid_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(src.fImage), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + break; + case SkMask::kARGB32_Format: { + uint32_t* srcARGB = reinterpret_cast(src.fImage); + clamp_solid_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(srcARGB), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + } break; + case SkMask::kLCD16_Format: { + uint16_t* srcLCD = reinterpret_cast(src.fImage); + clamp_solid_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(srcLCD), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + } break; + default: + SK_ABORT("Unhandled format."); + } + } break; + case kOuter_SkBlurStyle: { + auto dstStart = &dst->fImage[border.x() + border.y() * dst->fRowBytes]; + switch (src.fFormat) { + case SkMask::kBW_Format: + clamp_outer_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(src.fImage, 0), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + break; + case SkMask::kA8_Format: + clamp_outer_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(src.fImage), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + break; + case SkMask::kARGB32_Format: { + uint32_t* srcARGB = reinterpret_cast(src.fImage); + clamp_outer_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(srcARGB), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + } break; + case SkMask::kLCD16_Format: { + uint16_t* srcLCD = reinterpret_cast(src.fImage); + clamp_outer_with_orig( + dstStart, dst->fRowBytes, + SkMask::AlphaIter(srcLCD), src.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + } break; + default: + SK_ABORT("Unhandled format."); + } + } break; + case kInner_SkBlurStyle: { + // now we allocate the "real" dst, mirror the size of src + SkMask blur = *dst; + SkAutoMaskFreeImage autoFreeBlurMask(blur.fImage); + dst->fBounds = src.fBounds; + dst->fRowBytes = dst->fBounds.width(); + size_t dstSize = dst->computeImageSize(); + if (0 == dstSize) { + return false; // too big to allocate, abort + } + dst->fImage = SkMask::AllocImage(dstSize); + auto blurStart = &blur.fImage[border.x() + border.y() * blur.fRowBytes]; + switch (src.fFormat) { + case SkMask::kBW_Format: + merge_src_with_blur( + dst->fImage, dst->fRowBytes, + SkMask::AlphaIter(src.fImage, 0), src.fRowBytes, + blurStart, blur.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + break; + case SkMask::kA8_Format: + merge_src_with_blur( + dst->fImage, dst->fRowBytes, + SkMask::AlphaIter(src.fImage), src.fRowBytes, + blurStart, blur.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + break; + case SkMask::kARGB32_Format: { + uint32_t* srcARGB = reinterpret_cast(src.fImage); + merge_src_with_blur( + dst->fImage, dst->fRowBytes, + SkMask::AlphaIter(srcARGB), src.fRowBytes, + blurStart, blur.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + } break; + case SkMask::kLCD16_Format: { + uint16_t* srcLCD = reinterpret_cast(src.fImage); + merge_src_with_blur( + dst->fImage, dst->fRowBytes, + SkMask::AlphaIter(srcLCD), src.fRowBytes, + blurStart, blur.fRowBytes, + src.fBounds.width(), src.fBounds.height()); + } break; + default: + SK_ABORT("Unhandled format."); + } + } break; + } + + return true; +} + +/* Convolving a box with itself three times results in a piecewise + quadratic function: + + 0 x <= -1.5 + 9/8 + 3/2 x + 1/2 x^2 -1.5 < x <= -.5 + 3/4 - x^2 -.5 < x <= .5 + 9/8 - 3/2 x + 1/2 x^2 0.5 < x <= 1.5 + 0 1.5 < x + + Mathematica: + + g[x_] := Piecewise [ { + {9/8 + 3/2 x + 1/2 x^2 , -1.5 < x <= -.5}, + {3/4 - x^2 , -.5 < x <= .5}, + {9/8 - 3/2 x + 1/2 x^2 , 0.5 < x <= 1.5} + }, 0] + + To get the profile curve of the blurred step function at the rectangle + edge, we evaluate the indefinite integral, which is piecewise cubic: + + 0 x <= -1.5 + 9/16 + 9/8 x + 3/4 x^2 + 1/6 x^3 -1.5 < x <= -0.5 + 1/2 + 3/4 x - 1/3 x^3 -.5 < x <= .5 + 7/16 + 9/8 x - 3/4 x^2 + 1/6 x^3 .5 < x <= 1.5 + 1 1.5 < x + + in Mathematica code: + + gi[x_] := Piecewise[ { + { 0 , x <= -1.5 }, + { 9/16 + 9/8 x + 3/4 x^2 + 1/6 x^3, -1.5 < x <= -0.5 }, + { 1/2 + 3/4 x - 1/3 x^3 , -.5 < x <= .5}, + { 7/16 + 9/8 x - 3/4 x^2 + 1/6 x^3, .5 < x <= 1.5} + },1] +*/ + +static float gaussianIntegral(float x) { + if (x > 1.5f) { + return 0.0f; + } + if (x < -1.5f) { + return 1.0f; + } + + float x2 = x*x; + float x3 = x2*x; + + if ( x > 0.5f ) { + return 0.5625f - (x3 / 6.0f - 3.0f * x2 * 0.25f + 1.125f * x); + } + if ( x > -0.5f ) { + return 0.5f - (0.75f * x - x3 / 3.0f); + } + return 0.4375f + (-x3 / 6.0f - 3.0f * x2 * 0.25f - 1.125f * x); +} + +/* ComputeBlurProfile fills in an array of floating + point values between 0 and 255 for the profile signature of + a blurred half-plane with the given blur radius. Since we're + going to be doing screened multiplications (i.e., 1 - (1-x)(1-y)) + all the time, we actually fill in the profile pre-inverted + (already done 255-x). +*/ + +void SkBlurMask::ComputeBlurProfile(uint8_t* profile, int size, SkScalar sigma) { + SkASSERT(SkScalarCeilToInt(6*sigma) == size); + + int center = size >> 1; + + float invr = 1.f/(2*sigma); + + profile[0] = 255; + for (int x = 1 ; x < size ; ++x) { + float scaled_x = (center - x - .5f) * invr; + float gi = gaussianIntegral(scaled_x); + profile[x] = 255 - (uint8_t) (255.f * gi); + } +} + +// TODO MAYBE: Maintain a profile cache to avoid recomputing this for +// commonly used radii. Consider baking some of the most common blur radii +// directly in as static data? + +// Implementation adapted from Michael Herf's approach: +// http://stereopsis.com/shadowrect/ + +uint8_t SkBlurMask::ProfileLookup(const uint8_t *profile, int loc, + int blurredWidth, int sharpWidth) { + // how far are we from the original edge? + int dx = SkAbs32(((loc << 1) + 1) - blurredWidth) - sharpWidth; + int ox = dx >> 1; + if (ox < 0) { + ox = 0; + } + + return profile[ox]; +} + +void SkBlurMask::ComputeBlurredScanline(uint8_t *pixels, const uint8_t *profile, + unsigned int width, SkScalar sigma) { + + unsigned int profile_size = SkScalarCeilToInt(6*sigma); + skia_private::AutoTMalloc horizontalScanline(width); + + unsigned int sw = width - profile_size; + // nearest odd number less than the profile size represents the center + // of the (2x scaled) profile + int center = ( profile_size & ~1 ) - 1; + + int w = sw - center; + + for (unsigned int x = 0 ; x < width ; ++x) { + if (profile_size <= sw) { + pixels[x] = ProfileLookup(profile, x, width, w); + } else { + float span = float(sw)/(2*sigma); + float giX = 1.5f - (x+.5f)/(2*sigma); + pixels[x] = (uint8_t) (255 * (gaussianIntegral(giX) - gaussianIntegral(giX + span))); + } + } +} + +bool SkBlurMask::BlurRect(SkScalar sigma, SkMask *dst, + const SkRect &src, SkBlurStyle style, + SkIPoint *margin, SkMask::CreateMode createMode) { + int profileSize = SkScalarCeilToInt(6*sigma); + if (profileSize <= 0) { + return false; // no blur to compute + } + + int pad = profileSize/2; + if (margin) { + margin->set( pad, pad ); + } + + dst->fBounds.setLTRB(SkScalarRoundToInt(src.fLeft - pad), + SkScalarRoundToInt(src.fTop - pad), + SkScalarRoundToInt(src.fRight + pad), + SkScalarRoundToInt(src.fBottom + pad)); + + dst->fRowBytes = dst->fBounds.width(); + dst->fFormat = SkMask::kA8_Format; + dst->fImage = nullptr; + + int sw = SkScalarFloorToInt(src.width()); + int sh = SkScalarFloorToInt(src.height()); + + if (createMode == SkMask::kJustComputeBounds_CreateMode) { + if (style == kInner_SkBlurStyle) { + dst->fBounds = src.round(); // restore trimmed bounds + dst->fRowBytes = sw; + } + return true; + } + + AutoTMalloc profile(profileSize); + + ComputeBlurProfile(profile, profileSize, sigma); + + size_t dstSize = dst->computeImageSize(); + if (0 == dstSize) { + return false; // too big to allocate, abort + } + + uint8_t* dp = SkMask::AllocImage(dstSize); + + dst->fImage = dp; + + int dstHeight = dst->fBounds.height(); + int dstWidth = dst->fBounds.width(); + + uint8_t *outptr = dp; + + AutoTMalloc horizontalScanline(dstWidth); + AutoTMalloc verticalScanline(dstHeight); + + ComputeBlurredScanline(horizontalScanline, profile, dstWidth, sigma); + ComputeBlurredScanline(verticalScanline, profile, dstHeight, sigma); + + for (int y = 0 ; y < dstHeight ; ++y) { + for (int x = 0 ; x < dstWidth ; x++) { + unsigned int maskval = SkMulDiv255Round(horizontalScanline[x], verticalScanline[y]); + *(outptr++) = maskval; + } + } + + if (style == kInner_SkBlurStyle) { + // now we allocate the "real" dst, mirror the size of src + size_t srcSize = (size_t)(src.width() * src.height()); + if (0 == srcSize) { + return false; // too big to allocate, abort + } + dst->fImage = SkMask::AllocImage(srcSize); + for (int y = 0 ; y < sh ; y++) { + uint8_t *blur_scanline = dp + (y+pad)*dstWidth + pad; + uint8_t *inner_scanline = dst->fImage + y*sw; + memcpy(inner_scanline, blur_scanline, sw); + } + SkMask::FreeImage(dp); + + dst->fBounds = src.round(); // restore trimmed bounds + dst->fRowBytes = sw; + + } else if (style == kOuter_SkBlurStyle) { + for (int y = pad ; y < dstHeight-pad ; y++) { + uint8_t *dst_scanline = dp + y*dstWidth + pad; + memset(dst_scanline, 0, sw); + } + } else if (style == kSolid_SkBlurStyle) { + for (int y = pad ; y < dstHeight-pad ; y++) { + uint8_t *dst_scanline = dp + y*dstWidth + pad; + memset(dst_scanline, 0xff, sw); + } + } + // normal and solid styles are the same for analytic rect blurs, so don't + // need to handle solid specially. + + return true; +} + +bool SkBlurMask::BlurRRect(SkScalar sigma, SkMask *dst, + const SkRRect &src, SkBlurStyle style, + SkIPoint *margin, SkMask::CreateMode createMode) { + // Temporary for now -- always fail, should cause caller to fall back + // to old path. Plumbing just to land API and parallelize effort. + + return false; +} + +// The "simple" blur is a direct implementation of separable convolution with a discrete +// gaussian kernel. It's "ground truth" in a sense; too slow to be used, but very +// useful for correctness comparisons. + +bool SkBlurMask::BlurGroundTruth(SkScalar sigma, SkMask* dst, const SkMask& src, + SkBlurStyle style, SkIPoint* margin) { + + if (src.fFormat != SkMask::kA8_Format) { + return false; + } + + float variance = sigma * sigma; + + int windowSize = SkScalarCeilToInt(sigma*6); + // round window size up to nearest odd number + windowSize |= 1; + + AutoTMalloc gaussWindow(windowSize); + + int halfWindow = windowSize >> 1; + + gaussWindow[halfWindow] = 1; + + float windowSum = 1; + for (int x = 1 ; x <= halfWindow ; ++x) { + float gaussian = expf(-x*x / (2*variance)); + gaussWindow[halfWindow + x] = gaussWindow[halfWindow-x] = gaussian; + windowSum += 2*gaussian; + } + + // leave the filter un-normalized for now; we will divide by the normalization + // sum later; + + int pad = halfWindow; + if (margin) { + margin->set( pad, pad ); + } + + dst->fBounds = src.fBounds; + dst->fBounds.outset(pad, pad); + + dst->fRowBytes = dst->fBounds.width(); + dst->fFormat = SkMask::kA8_Format; + dst->fImage = nullptr; + + if (src.fImage) { + + size_t dstSize = dst->computeImageSize(); + if (0 == dstSize) { + return false; // too big to allocate, abort + } + + int srcWidth = src.fBounds.width(); + int srcHeight = src.fBounds.height(); + int dstWidth = dst->fBounds.width(); + + const uint8_t* srcPixels = src.fImage; + uint8_t* dstPixels = SkMask::AllocImage(dstSize); + SkAutoMaskFreeImage autoFreeDstPixels(dstPixels); + + // do the actual blur. First, make a padded copy of the source. + // use double pad so we never have to check if we're outside anything + + int padWidth = srcWidth + 4*pad; + int padHeight = srcHeight; + int padSize = padWidth * padHeight; + + AutoTMalloc padPixels(padSize); + memset(padPixels, 0, padSize); + + for (int y = 0 ; y < srcHeight; ++y) { + uint8_t* padptr = padPixels + y * padWidth + 2*pad; + const uint8_t* srcptr = srcPixels + y * srcWidth; + memcpy(padptr, srcptr, srcWidth); + } + + // blur in X, transposing the result into a temporary floating point buffer. + // also double-pad the intermediate result so that the second blur doesn't + // have to do extra conditionals. + + int tmpWidth = padHeight + 4*pad; + int tmpHeight = padWidth - 2*pad; + int tmpSize = tmpWidth * tmpHeight; + + AutoTMalloc tmpImage(tmpSize); + memset(tmpImage, 0, tmpSize*sizeof(tmpImage[0])); + + for (int y = 0 ; y < padHeight ; ++y) { + uint8_t *srcScanline = padPixels + y*padWidth; + for (int x = pad ; x < padWidth - pad ; ++x) { + float *outPixel = tmpImage + (x-pad)*tmpWidth + y + 2*pad; // transposed output + uint8_t *windowCenter = srcScanline + x; + for (int i = -pad ; i <= pad ; ++i) { + *outPixel += gaussWindow[pad+i]*windowCenter[i]; + } + *outPixel /= windowSum; + } + } + + // blur in Y; now filling in the actual desired destination. We have to do + // the transpose again; these transposes guarantee that we read memory in + // linear order. + + for (int y = 0 ; y < tmpHeight ; ++y) { + float *srcScanline = tmpImage + y*tmpWidth; + for (int x = pad ; x < tmpWidth - pad ; ++x) { + float *windowCenter = srcScanline + x; + float finalValue = 0; + for (int i = -pad ; i <= pad ; ++i) { + finalValue += gaussWindow[pad+i]*windowCenter[i]; + } + finalValue /= windowSum; + uint8_t *outPixel = dstPixels + (x-pad)*dstWidth + y; // transposed output + int integerPixel = int(finalValue + 0.5f); + *outPixel = SkTPin(SkClampPos(integerPixel), 0, 255); + } + } + + dst->fImage = dstPixels; + switch (style) { + case kNormal_SkBlurStyle: + break; + case kSolid_SkBlurStyle: { + clamp_solid_with_orig( + dstPixels + pad*dst->fRowBytes + pad, dst->fRowBytes, + SkMask::AlphaIter(srcPixels), src.fRowBytes, + srcWidth, srcHeight); + } break; + case kOuter_SkBlurStyle: { + clamp_outer_with_orig( + dstPixels + pad*dst->fRowBytes + pad, dst->fRowBytes, + SkMask::AlphaIter(srcPixels), src.fRowBytes, + srcWidth, srcHeight); + } break; + case kInner_SkBlurStyle: { + // now we allocate the "real" dst, mirror the size of src + size_t srcSize = src.computeImageSize(); + if (0 == srcSize) { + return false; // too big to allocate, abort + } + dst->fImage = SkMask::AllocImage(srcSize); + merge_src_with_blur(dst->fImage, src.fRowBytes, + SkMask::AlphaIter(srcPixels), src.fRowBytes, + dstPixels + pad*dst->fRowBytes + pad, + dst->fRowBytes, srcWidth, srcHeight); + SkMask::FreeImage(dstPixels); + } break; + } + autoFreeDstPixels.release(); + } + + if (style == kInner_SkBlurStyle) { + dst->fBounds = src.fBounds; // restore trimmed bounds + dst->fRowBytes = src.fRowBytes; + } + + return true; +} diff --git a/gfx/skia/skia/src/core/SkBlurMask.h b/gfx/skia/skia/src/core/SkBlurMask.h new file mode 100644 index 0000000000..b7f790e962 --- /dev/null +++ b/gfx/skia/skia/src/core/SkBlurMask.h @@ -0,0 +1,87 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlurMask_DEFINED +#define SkBlurMask_DEFINED + +#include "include/core/SkBlurTypes.h" +#include "include/core/SkRRect.h" +#include "include/core/SkShader.h" +#include "src/core/SkMask.h" + +class SkBlurMask { +public: + static bool SK_WARN_UNUSED_RESULT BlurRect(SkScalar sigma, SkMask *dst, const SkRect &src, + SkBlurStyle, SkIPoint *margin = nullptr, + SkMask::CreateMode createMode = + SkMask::kComputeBoundsAndRenderImage_CreateMode); + static bool SK_WARN_UNUSED_RESULT BlurRRect(SkScalar sigma, SkMask *dst, const SkRRect &src, + SkBlurStyle, SkIPoint *margin = nullptr, + SkMask::CreateMode createMode = + SkMask::kComputeBoundsAndRenderImage_CreateMode); + + // forceQuality will prevent BoxBlur from falling back to the low quality approach when sigma + // is very small -- this can be used predict the margin bump ahead of time without completely + // replicating the internal logic. This permits not only simpler caching of blurred results, + // but also being able to predict precisely at what pixels the blurred profile of e.g. a + // rectangle will lie. + // + // Calling details: + // * calculate margin - if src.fImage is null, then this call only calculates the border. + // * failure - if src.fImage is not null, failure is signal with dst->fImage being + // null. + + static bool SK_WARN_UNUSED_RESULT BoxBlur(SkMask* dst, const SkMask& src, + SkScalar sigma, SkBlurStyle style, + SkIPoint* margin = nullptr); + + // the "ground truth" blur does a gaussian convolution; it's slow + // but useful for comparison purposes. + static bool SK_WARN_UNUSED_RESULT BlurGroundTruth(SkScalar sigma, SkMask* dst, + const SkMask& src, + SkBlurStyle, SkIPoint* margin = nullptr); + + // If radius > 0, return the corresponding sigma, else return 0 + static SkScalar SK_SPI ConvertRadiusToSigma(SkScalar radius); + // If sigma > 0.5, return the corresponding radius, else return 0 + static SkScalar SK_SPI ConvertSigmaToRadius(SkScalar sigma); + + /* Helper functions for analytic rectangle blurs */ + + /** Look up the intensity of the (one dimnensional) blurred half-plane. + @param profile The precomputed 1D blur profile; initialized by ComputeBlurProfile below. + @param loc the location to look up; The lookup will clamp invalid inputs, but + meaningful data are available between 0 and blurred_width + @param blurred_width The width of the final, blurred rectangle + @param sharp_width The width of the original, unblurred rectangle. + */ + static uint8_t ProfileLookup(const uint8_t* profile, int loc, int blurredWidth, int sharpWidth); + + /** Populate the profile of a 1D blurred halfplane. + @param profile The 1D table to fill in + @param size Should be 6*sigma bytes + @param sigma The standard deviation of the gaussian blur kernel + */ + static void ComputeBlurProfile(uint8_t* profile, int size, SkScalar sigma); + + /** Compute an entire scanline of a blurred step function. This is a 1D helper that + will produce both the horizontal and vertical profiles of the blurry rectangle. + @param pixels Location to store the resulting pixel data; allocated and managed by caller + @param profile Precomputed blur profile computed by ComputeBlurProfile above. + @param width Size of the pixels array. + @param sigma Standard deviation of the gaussian blur kernel used to compute the profile; + this implicitly gives the size of the pixels array. + */ + + static void ComputeBlurredScanline(uint8_t* pixels, const uint8_t* profile, + unsigned int width, SkScalar sigma); + + + +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkCachedData.cpp b/gfx/skia/skia/src/core/SkCachedData.cpp new file mode 100644 index 0000000000..7731a6b351 --- /dev/null +++ b/gfx/skia/skia/src/core/SkCachedData.cpp @@ -0,0 +1,177 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkMalloc.h" +#include "include/private/chromium/SkDiscardableMemory.h" +#include "src/core/SkCachedData.h" + +SkCachedData::SkCachedData(void* data, size_t size) + : fData(data) + , fSize(size) + , fRefCnt(1) + , fStorageType(kMalloc_StorageType) + , fInCache(false) + , fIsLocked(true) +{ + fStorage.fMalloc = data; +} + +SkCachedData::SkCachedData(size_t size, SkDiscardableMemory* dm) + : fData(dm->data()) + , fSize(size) + , fRefCnt(1) + , fStorageType(kDiscardableMemory_StorageType) + , fInCache(false) + , fIsLocked(true) +{ + fStorage.fDM = dm; +} + +SkCachedData::~SkCachedData() { + switch (fStorageType) { + case kMalloc_StorageType: + sk_free(fStorage.fMalloc); + break; + case kDiscardableMemory_StorageType: + delete fStorage.fDM; + break; + } +} + +class SkCachedData::AutoMutexWritable { +public: + AutoMutexWritable(const SkCachedData* cd) : fCD(const_cast(cd)) { + fCD->fMutex.acquire(); + fCD->validate(); + } + ~AutoMutexWritable() { + fCD->validate(); + fCD->fMutex.release(); + } + + SkCachedData* get() { return fCD; } + SkCachedData* operator->() { return fCD; } + +private: + SkCachedData* fCD; +}; + +void SkCachedData::internalRef(bool fromCache) const { + AutoMutexWritable(this)->inMutexRef(fromCache); +} + +void SkCachedData::internalUnref(bool fromCache) const { + if (AutoMutexWritable(this)->inMutexUnref(fromCache)) { + // can't delete inside doInternalUnref, since it is locking a mutex (which we own) + delete this; + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkCachedData::inMutexRef(bool fromCache) { + if ((1 == fRefCnt) && fInCache) { + this->inMutexLock(); + } + + fRefCnt += 1; + if (fromCache) { + SkASSERT(!fInCache); + fInCache = true; + } +} + +bool SkCachedData::inMutexUnref(bool fromCache) { + switch (--fRefCnt) { + case 0: + // we're going to be deleted, so we need to be unlocked (for DiscardableMemory) + if (fIsLocked) { + this->inMutexUnlock(); + } + break; + case 1: + if (fInCache && !fromCache) { + // If we're down to 1 owner, and that owner is the cache, this it is safe + // to unlock (and mutate fData) even if the cache is in a different thread, + // as the cache is NOT allowed to inspect or use fData. + this->inMutexUnlock(); + } + break; + default: + break; + } + + if (fromCache) { + SkASSERT(fInCache); + fInCache = false; + } + + // return true when we need to be deleted + return 0 == fRefCnt; +} + +void SkCachedData::inMutexLock() { + fMutex.assertHeld(); + + SkASSERT(!fIsLocked); + fIsLocked = true; + + switch (fStorageType) { + case kMalloc_StorageType: + this->setData(fStorage.fMalloc); + break; + case kDiscardableMemory_StorageType: + if (fStorage.fDM->lock()) { + void* ptr = fStorage.fDM->data(); + SkASSERT(ptr); + this->setData(ptr); + } else { + this->setData(nullptr); // signal failure to lock, contents are gone + } + break; + } +} + +void SkCachedData::inMutexUnlock() { + fMutex.assertHeld(); + + SkASSERT(fIsLocked); + fIsLocked = false; + + switch (fStorageType) { + case kMalloc_StorageType: + // nothing to do/check + break; + case kDiscardableMemory_StorageType: + if (fData) { // did the previous lock succeed? + fStorage.fDM->unlock(); + } + break; + } + this->setData(nullptr); // signal that we're in an unlocked state +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG +void SkCachedData::validate() const { + if (fIsLocked) { + SkASSERT((fInCache && fRefCnt > 1) || !fInCache); + switch (fStorageType) { + case kMalloc_StorageType: + SkASSERT(fData == fStorage.fMalloc); + break; + case kDiscardableMemory_StorageType: + // fData can be null or the actual value, depending if DM's lock succeeded + break; + } + } else { + SkASSERT((fInCache && 1 == fRefCnt) || (0 == fRefCnt)); + SkASSERT(nullptr == fData); + } +} +#endif diff --git a/gfx/skia/skia/src/core/SkCachedData.h b/gfx/skia/skia/src/core/SkCachedData.h new file mode 100644 index 0000000000..2573bafbd5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkCachedData.h @@ -0,0 +1,113 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCachedData_DEFINED +#define SkCachedData_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkNoncopyable.h" + +class SkDiscardableMemory; + +class SkCachedData : ::SkNoncopyable { +public: + SkCachedData(void* mallocData, size_t size); + SkCachedData(size_t size, SkDiscardableMemory*); + virtual ~SkCachedData(); + + size_t size() const { return fSize; } + const void* data() const { return fData; } + + void* writable_data() { return fData; } + + void ref() const { this->internalRef(false); } + void unref() const { this->internalUnref(false); } + + int testing_only_getRefCnt() const { return fRefCnt; } + bool testing_only_isLocked() const { return fIsLocked; } + bool testing_only_isInCache() const { return fInCache; } + + SkDiscardableMemory* diagnostic_only_getDiscardable() const { + return kDiscardableMemory_StorageType == fStorageType ? fStorage.fDM : nullptr; + } + +protected: + // called when fData changes. could be nullptr. + virtual void onDataChange(void* oldData, void* newData) {} + +private: + SkMutex fMutex; // could use a pool of these... + + enum StorageType { + kDiscardableMemory_StorageType, + kMalloc_StorageType + }; + + union { + SkDiscardableMemory* fDM; + void* fMalloc; + } fStorage; + void* fData; + size_t fSize; + int fRefCnt; // low-bit means we're owned by the cache + StorageType fStorageType; + bool fInCache; + bool fIsLocked; + + void internalRef(bool fromCache) const; + void internalUnref(bool fromCache) const; + + void inMutexRef(bool fromCache); + bool inMutexUnref(bool fromCache); // returns true if we should delete "this" + void inMutexLock(); + void inMutexUnlock(); + + // called whenever our fData might change (lock or unlock) + void setData(void* newData) { + if (newData != fData) { + // notify our subclasses of the change + this->onDataChange(fData, newData); + fData = newData; + } + } + + class AutoMutexWritable; + +public: +#ifdef SK_DEBUG + void validate() const; +#else + void validate() const {} +#endif + + /* + * Attaching a data to to a SkResourceCache (only one at a time) enables the data to be + * unlocked when the cache is the only owner, thus freeing it to be purged (assuming the + * data is backed by a SkDiscardableMemory). + * + * When attached, it also automatically attempts to "lock" the data when the first client + * ref's the data (typically from a find(key, visitor) call). + * + * Thus the data will always be "locked" when a non-cache has a ref on it (whether or not + * the lock succeeded to recover the memory -- check data() to see if it is nullptr). + */ + + /* + * Call when adding this instance to a SkResourceCache::Rec subclass + * (typically in the Rec's constructor). + */ + void attachToCacheAndRef() const { this->internalRef(true); } + + /* + * Call when removing this instance from a SkResourceCache::Rec subclass + * (typically in the Rec's destructor). + */ + void detachFromCacheAndUnref() const { this->internalUnref(true); } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkCanvas.cpp b/gfx/skia/skia/src/core/SkCanvas.cpp new file mode 100644 index 0000000000..c072afe5fb --- /dev/null +++ b/gfx/skia/skia/src/core/SkCanvas.cpp @@ -0,0 +1,3087 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkBlender.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkMesh.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPicture.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkRasterHandleAllocator.h" +#include "include/core/SkRegion.h" +#include "include/core/SkShader.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTextBlob.h" +#include "include/core/SkTileMode.h" +#include "include/core/SkTypes.h" +#include "include/core/SkVertices.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkSafe32.h" +#include "include/private/base/SkSpan_impl.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "include/utils/SkNoDrawCanvas.h" +#include "src/base/SkMSAN.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkDevice.h" +#include "src/core/SkImageFilterTypes.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkLatticeIter.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMatrixUtils.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSurfacePriv.h" +#include "src/core/SkTextBlobPriv.h" +#include "src/core/SkTraceEvent.h" +#include "src/core/SkVerticesPriv.h" +#include "src/image/SkSurface_Base.h" +#include "src/text/GlyphRun.h" +#include "src/utils/SkPatchUtils.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/Device_v1.h" +#include "src/utils/SkTestCanvas.h" +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) +# include "src/gpu/ganesh/GrRenderTarget.h" +# include "src/gpu/ganesh/GrRenderTargetProxy.h" +#endif +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Device.h" +#endif + +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) +#include "include/private/chromium/SkChromeRemoteGlyphCache.h" +#include "include/private/chromium/Slug.h" +#endif + +#define RETURN_ON_NULL(ptr) do { if (nullptr == (ptr)) return; } while (0) +#define RETURN_ON_FALSE(pred) do { if (!(pred)) return; } while (0) + +// This is a test: static_assert with no message is a c++17 feature, +// and std::max() is constexpr only since the c++14 stdlib. +static_assert(std::max(3,4) == 4); + +using Slug = sktext::gpu::Slug; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +/* + * Return true if the drawing this rect would hit every pixels in the canvas. + * + * Returns false if + * - rect does not contain the canvas' bounds + * - paint is not fill + * - paint would blur or otherwise change the coverage of the rect + */ +bool SkCanvas::wouldOverwriteEntireSurface(const SkRect* rect, const SkPaint* paint, + ShaderOverrideOpacity overrideOpacity) const { + static_assert((int)SkPaintPriv::kNone_ShaderOverrideOpacity == + (int)kNone_ShaderOverrideOpacity, + "need_matching_enums0"); + static_assert((int)SkPaintPriv::kOpaque_ShaderOverrideOpacity == + (int)kOpaque_ShaderOverrideOpacity, + "need_matching_enums1"); + static_assert((int)SkPaintPriv::kNotOpaque_ShaderOverrideOpacity == + (int)kNotOpaque_ShaderOverrideOpacity, + "need_matching_enums2"); + + const SkISize size = this->getBaseLayerSize(); + const SkRect bounds = SkRect::MakeIWH(size.width(), size.height()); + + // if we're clipped at all, we can't overwrite the entire surface + { + const SkBaseDevice* base = this->baseDevice(); + const SkBaseDevice* top = this->topDevice(); + if (base != top) { + return false; // we're in a saveLayer, so conservatively don't assume we'll overwrite + } + if (!base->clipIsWideOpen()) { + return false; + } + } + + if (rect) { + if (!this->getTotalMatrix().isScaleTranslate()) { + return false; // conservative + } + + SkRect devRect; + this->getTotalMatrix().mapRectScaleTranslate(&devRect, *rect); + if (!devRect.contains(bounds)) { + return false; + } + } + + if (paint) { + SkPaint::Style paintStyle = paint->getStyle(); + if (!(paintStyle == SkPaint::kFill_Style || + paintStyle == SkPaint::kStrokeAndFill_Style)) { + return false; + } + if (paint->getMaskFilter() || paint->getPathEffect() || paint->getImageFilter()) { + return false; // conservative + } + } + return SkPaintPriv::Overwrites(paint, (SkPaintPriv::ShaderOverrideOpacity)overrideOpacity); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkCanvas::predrawNotify(bool willOverwritesEntireSurface) { + if (fSurfaceBase) { + if (!fSurfaceBase->aboutToDraw(willOverwritesEntireSurface + ? SkSurface::kDiscard_ContentChangeMode + : SkSurface::kRetain_ContentChangeMode)) { + return false; + } + } + return true; +} + +bool SkCanvas::predrawNotify(const SkRect* rect, const SkPaint* paint, + ShaderOverrideOpacity overrideOpacity) { + if (fSurfaceBase) { + SkSurface::ContentChangeMode mode = SkSurface::kRetain_ContentChangeMode; + // Since willOverwriteAllPixels() may not be complete free to call, we only do so if + // there is an outstanding snapshot, since w/o that, there will be no copy-on-write + // and therefore we don't care which mode we're in. + // + if (fSurfaceBase->outstandingImageSnapshot()) { + if (this->wouldOverwriteEntireSurface(rect, paint, overrideOpacity)) { + mode = SkSurface::kDiscard_ContentChangeMode; + } + } + if (!fSurfaceBase->aboutToDraw(mode)) { + return false; + } + } + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +SkCanvas::Layer::Layer(sk_sp device, + sk_sp imageFilter, + const SkPaint& paint) + : fDevice(std::move(device)) + , fImageFilter(std::move(imageFilter)) + , fPaint(paint) + , fDiscard(false) { + SkASSERT(fDevice); + // Any image filter should have been pulled out and stored in 'imageFilter' so that 'paint' + // can be used as-is to draw the result of the filter to the dst device. + SkASSERT(!fPaint.getImageFilter()); +} + +SkCanvas::BackImage::BackImage(sk_sp img, SkIPoint loc) + :fImage(img), fLoc(loc) {} +SkCanvas::BackImage::BackImage(const BackImage&) = default; +SkCanvas::BackImage::BackImage(BackImage&&) = default; +SkCanvas::BackImage& SkCanvas::BackImage::operator=(const BackImage&) = default; +SkCanvas::BackImage::~BackImage() = default; + +SkCanvas::MCRec::MCRec(SkBaseDevice* device) : fDevice(device) { + SkASSERT(fDevice); +} + +SkCanvas::MCRec::MCRec(const MCRec* prev) : fDevice(prev->fDevice), fMatrix(prev->fMatrix) { + SkASSERT(fDevice); +} + +SkCanvas::MCRec::~MCRec() {} + +void SkCanvas::MCRec::newLayer(sk_sp layerDevice, + sk_sp filter, + const SkPaint& restorePaint) { + SkASSERT(!fBackImage); + fLayer = std::make_unique(std::move(layerDevice), std::move(filter), restorePaint); + fDevice = fLayer->fDevice.get(); +} + +void SkCanvas::MCRec::reset(SkBaseDevice* device) { + SkASSERT(!fLayer); + SkASSERT(device); + SkASSERT(fDeferredSaveCount == 0); + fDevice = device; + fMatrix.setIdentity(); +} + +class SkCanvas::AutoUpdateQRBounds { +public: + explicit AutoUpdateQRBounds(SkCanvas* canvas) : fCanvas(canvas) { + // pre-condition, fQuickRejectBounds and other state should be valid before anything + // modifies the device's clip. + fCanvas->validateClip(); + } + ~AutoUpdateQRBounds() { + fCanvas->fQuickRejectBounds = fCanvas->computeDeviceClipBounds(); + // post-condition, we should remain valid after re-computing the bounds + fCanvas->validateClip(); + } + +private: + SkCanvas* fCanvas; + + AutoUpdateQRBounds(AutoUpdateQRBounds&&) = delete; + AutoUpdateQRBounds(const AutoUpdateQRBounds&) = delete; + AutoUpdateQRBounds& operator=(AutoUpdateQRBounds&&) = delete; + AutoUpdateQRBounds& operator=(const AutoUpdateQRBounds&) = delete; +}; + +///////////////////////////////////////////////////////////////////////////// +// Attempts to convert an image filter to its equivalent color filter, which if possible, modifies +// the paint to compose the image filter's color filter into the paint's color filter slot. +// Returns true if the paint has been modified. +// Requires the paint to have an image filter and the copy-on-write be initialized. +static bool image_to_color_filter(SkPaint* paint) { + SkASSERT(SkToBool(paint) && paint->getImageFilter()); + + SkColorFilter* imgCFPtr; + if (!paint->getImageFilter()->asAColorFilter(&imgCFPtr)) { + return false; + } + sk_sp imgCF(imgCFPtr); + + SkColorFilter* paintCF = paint->getColorFilter(); + if (paintCF) { + // The paint has both a colorfilter(paintCF) and an imagefilter-that-is-a-colorfilter(imgCF) + // and we need to combine them into a single colorfilter. + imgCF = imgCF->makeComposed(sk_ref_sp(paintCF)); + } + + paint->setColorFilter(std::move(imgCF)); + paint->setImageFilter(nullptr); + return true; +} + +/** + * We implement ImageFilters for a given draw by creating a layer, then applying the + * imagefilter to the pixels of that layer (its backing surface/image), and then + * we call restore() to xfer that layer to the main canvas. + * + * 1. SaveLayer (with a paint containing the current imagefilter and xfermode) + * 2. Generate the src pixels: + * Remove the imagefilter and the xfermode from the paint that we (AutoDrawLooper) + * return (fPaint). We then draw the primitive (using srcover) into a cleared + * buffer/surface. + * 3. Restore the layer created in #1 + * The imagefilter is passed the buffer/surface from the layer (now filled with the + * src pixels of the primitive). It returns a new "filtered" buffer, which we + * draw onto the previous layer using the xfermode from the original paint. + */ +class AutoLayerForImageFilter { +public: + // "rawBounds" is the original bounds of the primitive about to be drawn, unmodified by the + // paint. It's used to determine the size of the offscreen layer for filters. + // If null, the clip will be used instead. + // + // Draw functions should use layer->paint() instead of the passed-in paint. + AutoLayerForImageFilter(SkCanvas* canvas, + const SkPaint& paint, + const SkRect* rawBounds = nullptr) + : fPaint(paint) + , fCanvas(canvas) + , fTempLayerForImageFilter(false) { + SkDEBUGCODE(fSaveCount = canvas->getSaveCount();) + + if (fPaint.getImageFilter() && !image_to_color_filter(&fPaint)) { + // The draw paint has an image filter that couldn't be simplified to an equivalent + // color filter, so we have to inject an automatic saveLayer(). + SkPaint restorePaint; + restorePaint.setImageFilter(fPaint.refImageFilter()); + restorePaint.setBlender(fPaint.refBlender()); + + // Remove the restorePaint fields from our "working" paint + fPaint.setImageFilter(nullptr); + fPaint.setBlendMode(SkBlendMode::kSrcOver); + + SkRect storage; + if (rawBounds && fPaint.canComputeFastBounds()) { + // Make rawBounds include all paint outsets except for those due to image filters. + // At this point, fPaint's image filter has been moved to 'restorePaint'. + SkASSERT(!fPaint.getImageFilter()); + rawBounds = &fPaint.computeFastBounds(*rawBounds, &storage); + } + + canvas->fSaveCount += 1; + (void)canvas->internalSaveLayer(SkCanvas::SaveLayerRec(rawBounds, &restorePaint), + SkCanvas::kFullLayer_SaveLayerStrategy); + fTempLayerForImageFilter = true; + } + } + + AutoLayerForImageFilter(const AutoLayerForImageFilter&) = delete; + AutoLayerForImageFilter& operator=(const AutoLayerForImageFilter&) = delete; + AutoLayerForImageFilter(AutoLayerForImageFilter&&) = default; + AutoLayerForImageFilter& operator=(AutoLayerForImageFilter&&) = default; + + ~AutoLayerForImageFilter() { + if (fTempLayerForImageFilter) { + fCanvas->fSaveCount -= 1; + fCanvas->internalRestore(); + } + SkASSERT(fCanvas->getSaveCount() == fSaveCount); + } + + const SkPaint& paint() const { return fPaint; } + +private: + SkPaint fPaint; + SkCanvas* fCanvas; + bool fTempLayerForImageFilter; + + SkDEBUGCODE(int fSaveCount;) +}; + +std::optional SkCanvas::aboutToDraw( + SkCanvas* canvas, + const SkPaint& paint, + const SkRect* rawBounds, + CheckForOverwrite checkOverwrite, + ShaderOverrideOpacity overrideOpacity) +{ + if (checkOverwrite == CheckForOverwrite::kYes) { + if (!this->predrawNotify(rawBounds, &paint, overrideOpacity)) { + return std::nullopt; + } + } else { + if (!this->predrawNotify()) { + return std::nullopt; + } + } + return std::optional(std::in_place, canvas, paint, rawBounds); +} + +//////////////////////////////////////////////////////////////////////////// + +void SkCanvas::resetForNextPicture(const SkIRect& bounds) { + this->restoreToCount(1); + + // We're peering through a lot of structs here. Only at this scope do we + // know that the device is a SkNoPixelsDevice. + SkASSERT(fBaseDevice->isNoPixelsDevice()); + static_cast(fBaseDevice.get())->resetForNextPicture(bounds); + fMCRec->reset(fBaseDevice.get()); + fQuickRejectBounds = this->computeDeviceClipBounds(); +} + +void SkCanvas::init(sk_sp device) { + // SkCanvas.h declares internal storage for the hidden struct MCRec, and this + // assert ensure it's sufficient. <= is used because the struct has pointer fields, so the + // declared size is an upper bound across architectures. When the size is smaller, more stack + static_assert(sizeof(MCRec) <= kMCRecSize); + + if (!device) { + device = sk_make_sp(SkIRect::MakeEmpty(), fProps); + } + + // From this point on, SkCanvas will always have a device + SkASSERT(device); + + fSaveCount = 1; + fMCRec = new (fMCStack.push_back()) MCRec(device.get()); + + // The root device and the canvas should always have the same pixel geometry + SkASSERT(fProps.pixelGeometry() == device->surfaceProps().pixelGeometry()); + + fSurfaceBase = nullptr; + fBaseDevice = std::move(device); + fScratchGlyphRunBuilder = std::make_unique(); + fQuickRejectBounds = this->computeDeviceClipBounds(); +} + +SkCanvas::SkCanvas() : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) { + this->init(nullptr); +} + +SkCanvas::SkCanvas(int width, int height, const SkSurfaceProps* props) + : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) + , fProps(SkSurfacePropsCopyOrDefault(props)) { + this->init(sk_make_sp( + SkIRect::MakeWH(std::max(width, 0), std::max(height, 0)), fProps)); +} + +SkCanvas::SkCanvas(const SkIRect& bounds) + : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) { + SkIRect r = bounds.isEmpty() ? SkIRect::MakeEmpty() : bounds; + this->init(sk_make_sp(r, fProps)); +} + +SkCanvas::SkCanvas(sk_sp device) + : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) + , fProps(device->surfaceProps()) { + this->init(std::move(device)); +} + +SkCanvas::~SkCanvas() { + // Mark all pending layers to be discarded during restore (rather than drawn) + SkDeque::Iter iter(fMCStack, SkDeque::Iter::kFront_IterStart); + for (;;) { + MCRec* rec = (MCRec*)iter.next(); + if (!rec) { + break; + } + if (rec->fLayer) { + rec->fLayer->fDiscard = true; + } + } + + // free up the contents of our deque + this->restoreToCount(1); // restore everything but the last + this->internalRestore(); // restore the last, since we're going away +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkCanvas::flush() { + this->onFlush(); +} + +void SkCanvas::onFlush() { +#if defined(SK_GANESH) + auto dContext = GrAsDirectContext(this->recordingContext()); + + if (dContext) { + dContext->flushAndSubmit(); + } +#endif +} + +SkSurface* SkCanvas::getSurface() const { + return fSurfaceBase; +} + +SkISize SkCanvas::getBaseLayerSize() const { + return this->baseDevice()->imageInfo().dimensions(); +} + +SkBaseDevice* SkCanvas::topDevice() const { + SkASSERT(fMCRec->fDevice); + return fMCRec->fDevice; +} + +bool SkCanvas::readPixels(const SkPixmap& pm, int x, int y) { + return pm.addr() && this->baseDevice()->readPixels(pm, x, y); +} + +bool SkCanvas::readPixels(const SkImageInfo& dstInfo, void* dstP, size_t rowBytes, int x, int y) { + return this->readPixels({ dstInfo, dstP, rowBytes}, x, y); +} + +bool SkCanvas::readPixels(const SkBitmap& bm, int x, int y) { + SkPixmap pm; + return bm.peekPixels(&pm) && this->readPixels(pm, x, y); +} + +bool SkCanvas::writePixels(const SkBitmap& bitmap, int x, int y) { + SkPixmap pm; + if (bitmap.peekPixels(&pm)) { + return this->writePixels(pm.info(), pm.addr(), pm.rowBytes(), x, y); + } + return false; +} + +bool SkCanvas::writePixels(const SkImageInfo& srcInfo, const void* pixels, size_t rowBytes, + int x, int y) { + SkBaseDevice* device = this->baseDevice(); + + // This check gives us an early out and prevents generation ID churn on the surface. + // This is purely optional: it is a subset of the checks performed by SkWritePixelsRec. + SkIRect srcRect = SkIRect::MakeXYWH(x, y, srcInfo.width(), srcInfo.height()); + if (!srcRect.intersect({0, 0, device->width(), device->height()})) { + return false; + } + + // Tell our owning surface to bump its generation ID. + const bool completeOverwrite = srcRect.size() == device->imageInfo().dimensions(); + if (!this->predrawNotify(completeOverwrite)) { + return false; + } + + // This can still fail, most notably in the case of a invalid color type or alpha type + // conversion. We could pull those checks into this function and avoid the unnecessary + // generation ID bump. But then we would be performing those checks twice, since they + // are also necessary at the bitmap/pixmap entry points. + return device->writePixels({srcInfo, pixels, rowBytes}, x, y); +} + +////////////////////////////////////////////////////////////////////////////// + +void SkCanvas::checkForDeferredSave() { + if (fMCRec->fDeferredSaveCount > 0) { + this->doSave(); + } +} + +int SkCanvas::getSaveCount() const { +#ifdef SK_DEBUG + int count = 0; + SkDeque::Iter iter(fMCStack, SkDeque::Iter::kFront_IterStart); + for (;;) { + const MCRec* rec = (const MCRec*)iter.next(); + if (!rec) { + break; + } + count += 1 + rec->fDeferredSaveCount; + } + SkASSERT(count == fSaveCount); +#endif + return fSaveCount; +} + +int SkCanvas::save() { + fSaveCount += 1; + fMCRec->fDeferredSaveCount += 1; + return this->getSaveCount() - 1; // return our prev value +} + +void SkCanvas::doSave() { + this->willSave(); + + SkASSERT(fMCRec->fDeferredSaveCount > 0); + fMCRec->fDeferredSaveCount -= 1; + this->internalSave(); +} + +void SkCanvas::restore() { + if (fMCRec->fDeferredSaveCount > 0) { + SkASSERT(fSaveCount > 1); + fSaveCount -= 1; + fMCRec->fDeferredSaveCount -= 1; + } else { + // check for underflow + if (fMCStack.count() > 1) { + this->willRestore(); + SkASSERT(fSaveCount > 1); + fSaveCount -= 1; + this->internalRestore(); + this->didRestore(); + } + } +} + +void SkCanvas::restoreToCount(int count) { + // safety check + if (count < 1) { + count = 1; + } + + int n = this->getSaveCount() - count; + for (int i = 0; i < n; ++i) { + this->restore(); + } +} + +void SkCanvas::internalSave() { + fMCRec = new (fMCStack.push_back()) MCRec(fMCRec); + + this->topDevice()->save(); +} + +int SkCanvas::saveLayer(const SkRect* bounds, const SkPaint* paint) { + return this->saveLayer(SaveLayerRec(bounds, paint, 0)); +} + +int SkCanvas::saveLayer(const SaveLayerRec& rec) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (rec.fPaint && rec.fPaint->nothingToDraw()) { + // no need for the layer (or any of the draws until the matching restore() + this->save(); + this->clipRect({0,0,0,0}); + } else { + SaveLayerStrategy strategy = this->getSaveLayerStrategy(rec); + fSaveCount += 1; + this->internalSaveLayer(rec, strategy); + } + return this->getSaveCount() - 1; +} + +int SkCanvas::only_axis_aligned_saveBehind(const SkRect* bounds) { + if (bounds && !this->getLocalClipBounds().intersects(*bounds)) { + // Assuming clips never expand, if the request bounds is outside of the current clip + // there is no need to copy/restore the area, so just devolve back to a regular save. + this->save(); + } else { + bool doTheWork = this->onDoSaveBehind(bounds); + fSaveCount += 1; + this->internalSave(); + if (doTheWork) { + this->internalSaveBehind(bounds); + } + } + return this->getSaveCount() - 1; +} + +// In our current design/features, we should never have a layer (src) in a different colorspace +// than its parent (dst), so we assert that here. This is called out from other asserts, in case +// we add some feature in the future to allow a given layer/imagefilter to operate in a specific +// colorspace. +static void check_drawdevice_colorspaces(SkColorSpace* src, SkColorSpace* dst) { + SkASSERT(src == dst); +} + +// Helper function to compute the center reference point used for scale decomposition under +// non-linear transformations. +static skif::ParameterSpace compute_decomposition_center( + const SkMatrix& dstToLocal, + const skif::ParameterSpace* contentBounds, + const skif::DeviceSpace& targetOutput) { + // Will use the inverse and center of the device bounds if the content bounds aren't provided. + SkRect rect = contentBounds ? SkRect(*contentBounds) : SkRect::Make(SkIRect(targetOutput)); + SkPoint center = {rect.centerX(), rect.centerY()}; + if (!contentBounds) { + // Theoretically, the inverse transform could put center's homogeneous coord behind W = 0, + // but that case is handled automatically in Mapping::decomposeCTM later. + dstToLocal.mapPoints(¢er, 1); + } + + return skif::ParameterSpace(center); +} + +// Compute suitable transformations and layer bounds for a new layer that will be used as the source +// input into 'filter' before being drawn into 'dst' via the returned skif::Mapping. +// Null filters are permitted and act as the identity. The returned mapping will be compatible with +// the image filter. +// +// Returns an empty rect if the layer wouldn't draw anything after filtering. +static std::pair> get_layer_mapping_and_bounds( + const SkImageFilter* filter, + const SkMatrix& localToDst, + const skif::DeviceSpace& targetOutput, + const skif::ParameterSpace* contentBounds = nullptr, + bool mustCoverDst = true, + SkScalar scaleFactor = 1.0f) { + auto failedMapping = []() { + return std::make_pair>( + {}, skif::LayerSpace::Empty()); + }; + + SkMatrix dstToLocal; + if (!localToDst.isFinite() || + !localToDst.invert(&dstToLocal)) { + return failedMapping(); + } + + skif::ParameterSpace center = + compute_decomposition_center(dstToLocal, contentBounds, targetOutput); + // *after* possibly getting a representative point from the provided content bounds, it might + // be necessary to discard the bounds for subsequent layer calculations. + if (mustCoverDst) { + contentBounds = nullptr; + } + + // Determine initial mapping and a reasonable maximum dimension to prevent layer-to-device + // transforms with perspective and skew from triggering excessive buffer allocations. + skif::Mapping mapping; + if (!mapping.decomposeCTM(localToDst, filter, center)) { + return failedMapping(); + } + // Push scale factor into layer matrix and device matrix (net no change, but the layer will have + // its resolution adjusted in comparison to the final device). + if (scaleFactor != 1.0f && + !mapping.adjustLayerSpace(SkMatrix::Scale(scaleFactor, scaleFactor))) { + return failedMapping(); + } + + // Perspective and skew could exceed this since mapping.deviceToLayer(targetOutput) is + // theoretically unbounded under those conditions. Under a 45 degree rotation, a layer needs to + // be 2X larger per side of the prior device in order to fully cover it. We use the max of that + // and 2048 for a reasonable upper limit (this allows small layers under extreme transforms to + // use more relative resolution than a larger layer). + static const int kMinDimThreshold = 2048; + int maxLayerDim = std::max(Sk64_pin_to_s32(2 * std::max(SkIRect(targetOutput).width64(), + SkIRect(targetOutput).height64())), + kMinDimThreshold); + + skif::LayerSpace layerBounds; + if (filter) { + layerBounds = as_IFB(filter)->getInputBounds(mapping, targetOutput, contentBounds); + // When a filter is involved, the layer size may be larger than the default maxLayerDim due + // to required inputs for filters (e.g. a displacement map with a large radius). + if (layerBounds.width() > maxLayerDim || layerBounds.height() > maxLayerDim) { + skif::Mapping idealMapping{mapping.layerMatrix()}; + auto idealLayerBounds = as_IFB(filter)->getInputBounds(idealMapping, targetOutput, + contentBounds); + maxLayerDim = std::max(std::max(idealLayerBounds.width(), idealLayerBounds.height()), + maxLayerDim); + } + } else { + layerBounds = mapping.deviceToLayer(targetOutput); + if (contentBounds) { + // For better or for worse, user bounds currently act as a hard clip on the layer's + // extent (i.e., they implement the CSS filter-effects 'filter region' feature). + skif::LayerSpace knownBounds = mapping.paramToLayer(*contentBounds).roundOut(); + if (!layerBounds.intersect(knownBounds)) { + return failedMapping(); + } + } + } + + if (layerBounds.width() > maxLayerDim || layerBounds.height() > maxLayerDim) { + skif::LayerSpace newLayerBounds( + SkIRect::MakeWH(std::min(layerBounds.width(), maxLayerDim), + std::min(layerBounds.height(), maxLayerDim))); + SkMatrix adjust = SkMatrix::MakeRectToRect(SkRect::Make(SkIRect(layerBounds)), + SkRect::Make(SkIRect(newLayerBounds)), + SkMatrix::kFill_ScaleToFit); + if (!mapping.adjustLayerSpace(adjust)) { + return failedMapping(); + } else { + layerBounds = newLayerBounds; + } + } + + return {mapping, layerBounds}; +} + +// Ideally image filters operate in the dst color type, but if there is insufficient alpha bits +// we move some bits from color channels into the alpha channel since that can greatly improve +// the quality of blurs and other filters. +static SkColorType image_filter_color_type(SkImageInfo dstInfo) { + if (dstInfo.bytesPerPixel() <= 4 && + dstInfo.colorType() != kRGBA_8888_SkColorType && + dstInfo.colorType() != kBGRA_8888_SkColorType) { + // "Upgrade" A8, G8, 565, 4444, 1010102, 101010x, and 888x to 8888 + return kN32_SkColorType; + } else { + return dstInfo.colorType(); + } +} + +static bool draw_layer_as_sprite(const SkMatrix& matrix, const SkISize& size) { + // Assume anti-aliasing and highest valid filter mode (linear) for drawing layers and image + // filters. If the layer can be drawn as a sprite, these can be downgraded. + SkPaint paint; + paint.setAntiAlias(true); + SkSamplingOptions sampling{SkFilterMode::kLinear}; + return SkTreatAsSprite(matrix, size, sampling, paint.isAntiAlias()); +} + +void SkCanvas::internalDrawDeviceWithFilter(SkBaseDevice* src, + SkBaseDevice* dst, + const SkImageFilter* filter, + const SkPaint& paint, + DeviceCompatibleWithFilter compat, + SkScalar scaleFactor) { + check_drawdevice_colorspaces(dst->imageInfo().colorSpace(), + src->imageInfo().colorSpace()); + sk_sp filterColorSpace = dst->imageInfo().refColorSpace(); // == src.refColorSpace + + // 'filterColorType' ends up being the actual color type of the layer, so image filtering is + // effectively done in the layer's format. We get there in a roundabout way due to handling both + // regular and backdrop filters: + // - For regular filters, 'src' is the layer and 'dst' is the parent device. But the layer + // was constructed with a color type equal to image_filter_color_type(dst), so this matches + // the layer. + // - For backdrop filters, 'src' is the parent device and 'dst' is the layer, which was already + // constructed as image_filter_color_type(src). Calling image_filter_color_type twice does + // not change the color type, so it remains the color type of the layer. + const SkColorType filterColorType = image_filter_color_type(dst->imageInfo()); + + // 'filter' sees the src device's buffer as the implicit input image, and processes the image + // in this device space (referred to as the "layer" space). However, the filter + // parameters need to respect the current matrix, which is not necessarily the local matrix that + // was set on 'src' (e.g. because we've popped src off the stack already). + // TODO (michaelludwig): Stay in SkM44 once skif::Mapping supports SkM44 instead of SkMatrix. + SkMatrix localToSrc = (src->globalToDevice() * fMCRec->fMatrix).asM33(); + SkISize srcDims = src->imageInfo().dimensions(); + + // Whether or not we need to make a transformed tmp image from 'src', and what that transform is + bool needsIntermediateImage = false; + SkMatrix srcToIntermediate; + + skif::Mapping mapping; + skif::LayerSpace requiredInput; + if (compat == DeviceCompatibleWithFilter::kYes) { + // Just use the relative transform from src to dst and the src's whole image, since + // internalSaveLayer should have already determined what was necessary. We explicitly + // construct the inverse (dst->src) to avoid the case where src's and dst's coord transforms + // were individually invertible by SkM44::invert() but their product is considered not + // invertible by SkMatrix::invert(). When this happens the matrices are already poorly + // conditioned so getRelativeTransform() gives us something reasonable. + SkASSERT(scaleFactor == 1.0f); + mapping = skif::Mapping(src->getRelativeTransform(*dst), + dst->getRelativeTransform(*src), + localToSrc); + requiredInput = skif::LayerSpace(SkIRect::MakeSize(srcDims)); + SkASSERT(!requiredInput.isEmpty()); + } else { + // Compute the image filter mapping by decomposing the local->device matrix of dst and + // re-determining the required input. + std::tie(mapping, requiredInput) = get_layer_mapping_and_bounds( + filter, dst->localToDevice(), skif::DeviceSpace(dst->devClipBounds()), + nullptr, true, SkTPin(scaleFactor, 0.f, 1.f)); + if (requiredInput.isEmpty()) { + return; + } + + // The above mapping transforms from local to dst's device space, where the layer space + // represents the intermediate buffer. Now we need to determine the transform from src to + // intermediate to prepare the input to the filter. + if (!localToSrc.invert(&srcToIntermediate)) { + return; + } + srcToIntermediate.postConcat(mapping.layerMatrix()); + if (draw_layer_as_sprite(srcToIntermediate, srcDims)) { + // src differs from intermediate by just an integer translation, so it can be applied + // automatically when taking a subset of src if we update the mapping. + skif::LayerSpace srcOrigin({(int) srcToIntermediate.getTranslateX(), + (int) srcToIntermediate.getTranslateY()}); + mapping.applyOrigin(srcOrigin); + requiredInput.offset(-srcOrigin); + } else { + // The contents of 'src' will be drawn to an intermediate buffer using srcToIntermediate + // and that buffer will be the input to the image filter. + needsIntermediateImage = true; + } + } + + sk_sp filterInput; + if (!needsIntermediateImage) { + // The src device can be snapped directly + skif::LayerSpace srcSubset(SkIRect::MakeSize(srcDims)); + if (srcSubset.intersect(requiredInput)) { + filterInput = src->snapSpecial(SkIRect(srcSubset)); + + // TODO: For now image filter input images need to have a (0,0) origin. The required + // input's top left has been baked into srcSubset so we use that as the image origin. + mapping.applyOrigin(srcSubset.topLeft()); + } + } else { + // We need to produce a temporary image that is equivalent to 'src' but transformed to + // a coordinate space compatible with the image filter + SkASSERT(compat == DeviceCompatibleWithFilter::kUnknown); + SkRect srcRect; + if (!SkMatrixPriv::InverseMapRect(srcToIntermediate, &srcRect, + SkRect::Make(SkIRect(requiredInput)))) { + return; + } + + if (!srcRect.intersect(SkRect::Make(srcDims))) { + return; + } + SkIRect srcSubset = skif::RoundOut(srcRect); + + if (srcToIntermediate.isScaleTranslate()) { + // The transform is from srcRect to requiredInput, but srcRect may have been reduced + // to the src dimensions, so map srcSubset back to the intermediate space to get the + // appropriate scaled dimensions for snapScaledSpecial. + skif::LayerSpace requiredSubset( + skif::RoundOut(srcToIntermediate.mapRect(srcRect))); + filterInput = src->snapSpecialScaled(srcSubset, + {requiredSubset.width(), requiredSubset.height()}); + if (filterInput) { + // TODO: Like the non-intermediate case, we need to apply the image origin + mapping.applyOrigin(requiredSubset.topLeft()); + } // else fall through and apply transform using a draw + } + + if (!filterInput) { + // Either a complex transform or the scaled copy failed so do a copy-as-draw fallback. + sk_sp srcImage = src->snapSpecial(srcSubset); + if (!srcImage) { + return; + } + // Make a new surface and draw 'srcImage' into it with the srcToIntermediate transform + // to produce the final input image for the filter + SkBaseDevice::CreateInfo info(SkImageInfo::Make(requiredInput.width(), + requiredInput.height(), + filterColorType, + kPremul_SkAlphaType, + filterColorSpace), + SkPixelGeometry::kUnknown_SkPixelGeometry, + SkBaseDevice::TileUsage::kNever_TileUsage, + fAllocator.get()); + sk_sp intermediateDevice(src->onCreateDevice(info, &paint)); + if (!intermediateDevice) { + return; + } + intermediateDevice->setOrigin(SkM44(srcToIntermediate), + requiredInput.left(), requiredInput.top()); + + // We use drawPaint to fill the entire device with the src input + clamp tiling, which + // extends the backdrop's edge pixels to the parts of 'requiredInput' that map offscreen + // Without this, the intermediateDevice would contain transparent pixels that may then + // infect blurs and other filters with large kernels. + SkPaint imageFill; + imageFill.setShader(srcImage->asShader(SkTileMode::kClamp, + SkSamplingOptions{SkFilterMode::kLinear}, + SkMatrix::Translate(srcSubset.topLeft()))); + intermediateDevice->drawPaint(imageFill); + filterInput = intermediateDevice->snapSpecial(); + + // TODO: Like the non-intermediate case, we need to apply the image origin. + mapping.applyOrigin(requiredInput.topLeft()); + } + } + + if (filterInput) { + const bool use_nn = + draw_layer_as_sprite(mapping.layerToDevice(), filterInput->subset().size()); + SkSamplingOptions sampling{use_nn ? SkFilterMode::kNearest : SkFilterMode::kLinear}; + if (filter) { + dst->drawFilteredImage(mapping, filterInput.get(), filterColorType, filter, + sampling, paint); + } else { + dst->drawSpecial(filterInput.get(), mapping.layerToDevice(), sampling, paint); + } + } +} + +// This is similar to image_to_color_filter used by AutoLayerForImageFilter, but with key changes: +// - image_to_color_filter requires the entire image filter DAG to be represented as a color filter +// that does not affect transparent black (SkImageFilter::asAColorFilter) +// - when that is met, the image filter's CF is composed around any CF that was on the draw's paint +// since for a draw, the color filtering happens before any image filtering +// - optimize_layer_filter only applies to the last node and does not care about transparent black +// since a layer is being made regardless (SkImageFilter::isColorFilterNode) +// - any extracted CF is composed inside the restore paint's CF because image filters are evaluated +// before the color filter of a restore paint for layers. +// +// Assumes that 'filter', and thus its inputs, will remain owned by the caller. Modifies 'paint' +// to have the updated color filter and returns the image filter to evaluate on restore. +// TODO(michaelludwig): skbug.com/12083, once this guard goes away, the coversDevice arg can go away +static const SkImageFilter* optimize_layer_filter(const SkImageFilter* filter, SkPaint* paint, + bool* coversDevice=nullptr) { + SkASSERT(paint); + SkColorFilter* cf; + if (filter && filter->isColorFilterNode(&cf)) { + sk_sp inner(cf); + if (paint->getAlphaf() < 1.f) { + // The paint's alpha is applied after the image filter but before the paint's color + // filter. If there is transparency, we have to apply it between the two filters. + // FIXME: The Blend CF should allow composing directly at construction. + inner = SkColorFilters::Compose( + SkColorFilters::Blend(/*src*/paint->getColor4f(), nullptr, SkBlendMode::kDstIn), + /*dst*/std::move(inner)); + paint->setAlphaf(1.f); + } + + // Check if the once-wrapped color filter affects transparent black *before* we combine + // it with any original color filter on the paint. + if (coversDevice) { +#if defined(SK_LEGACY_LAYER_BOUNDS_EXPANSION) + *coversDevice = as_CFB(inner)->affectsTransparentBlack(); +#else + *coversDevice = false; +#endif + } + + paint->setColorFilter(SkColorFilters::Compose(paint->refColorFilter(), std::move(inner))); + SkASSERT(filter->countInputs() == 1); + return filter->getInput(0); + } else { + if (coversDevice) { + *coversDevice = false; + } + return filter; + } +} + +// If there is a backdrop filter, or if the restore paint has a color filter or blend mode that +// affects transparent black, then the new layer must be sized such that it covers the entire device +// clip bounds of the prior device (otherwise edges of the temporary layer would be visible). +// See skbug.com/8783 +static bool must_cover_prior_device(const SkImageFilter* backdrop, + const SkPaint& restorePaint) { +#if defined(SK_LEGACY_LAYER_BOUNDS_EXPANSION) + return SkToBool(backdrop); +#else + const SkColorFilter* cf = restorePaint.getColorFilter(); + if (backdrop || (cf && as_CFB(cf)->affectsTransparentBlack())) { + // Backdrop image filters always affect the entire (clip-limited) layer. A color filter + // affecting transparent black will colorize pixels that are outside the drawn bounds hint. + return true; + } + // A custom blender is assumed to modify transparent black; some fixed blend modes also modify + // transparent black and the whole layer must be used for the same reason as color filters. + if (auto blendMode = restorePaint.asBlendMode()) { + SkBlendModeCoeff src, dst; + if (SkBlendMode_AsCoeff(*blendMode, &src, &dst)) { + // If the source is (0,0,0,0), then dst is preserved as long as its coefficient + // evaluates to 1.0. This is true for kOne, kISA, and kISC. Anything else means the + // blend mode affects transparent black. + return dst != SkBlendModeCoeff::kOne && + dst != SkBlendModeCoeff::kISA && + dst != SkBlendModeCoeff::kISC; + } else { + // else an advanced blend mode, which preserve transparent black + return false; + } + } else { + // Blenders that aren't blend modes are assumed to modify transparent black. + return true; + } +#endif +} + +void SkCanvas::internalSaveLayer(const SaveLayerRec& rec, SaveLayerStrategy strategy) { + TRACE_EVENT0("skia", TRACE_FUNC); + // Do this before we create the layer. We don't call the public save() since that would invoke a + // possibly overridden virtual. + this->internalSave(); + + if (this->isClipEmpty()) { + // Early out if the layer wouldn't draw anything + return; + } + + // Build up the paint for restoring the layer, taking only the pieces of rec.fPaint that are + // relevant. Filtering is automatically chosen in internalDrawDeviceWithFilter based on the + // device's coordinate space. + SkPaint restorePaint(rec.fPaint ? *rec.fPaint : SkPaint()); + restorePaint.setMaskFilter(nullptr); // mask filters are ignored for saved layers + restorePaint.setImageFilter(nullptr); // the image filter is held separately + // Smooth non-axis-aligned layer edges; this automatically downgrades to non-AA for aligned + // layer restores. This is done to match legacy behavior where the post-applied MatrixTransform + // bilerp also smoothed cropped edges. See skbug.com/11252 + restorePaint.setAntiAlias(true); + + bool optimizedCFAffectsTransparent; + const SkImageFilter* filter = optimize_layer_filter( + rec.fPaint ? rec.fPaint->getImageFilter() : nullptr, &restorePaint, + &optimizedCFAffectsTransparent); + +#if !defined(SK_LEGACY_LAYER_BOUNDS_EXPANSION) + SkASSERT(!optimizedCFAffectsTransparent); // shouldn't be needed by new code +#endif + + // Size the new layer relative to the prior device, which may already be aligned for filters. + SkBaseDevice* priorDevice = this->topDevice(); + skif::Mapping newLayerMapping; + skif::LayerSpace layerBounds; + std::tie(newLayerMapping, layerBounds) = get_layer_mapping_and_bounds( + filter, priorDevice->localToDevice(), + skif::DeviceSpace(priorDevice->devClipBounds()), + skif::ParameterSpace::Optional(rec.fBounds), + must_cover_prior_device(rec.fBackdrop, restorePaint) || optimizedCFAffectsTransparent); + + auto abortLayer = [this]() { + // The filtered content would not draw anything, or the new device space has an invalid + // coordinate system, in which case we mark the current top device as empty so that nothing + // draws until the canvas is restored past this saveLayer. + AutoUpdateQRBounds aqr(this); + this->topDevice()->clipRect(SkRect::MakeEmpty(), SkClipOp::kIntersect, /* aa */ false); + }; + + if (layerBounds.isEmpty()) { + abortLayer(); + return; + } + + sk_sp newDevice; + if (strategy == kFullLayer_SaveLayerStrategy) { + SkASSERT(!layerBounds.isEmpty()); + + SkColorType layerColorType = SkToBool(rec.fSaveLayerFlags & kF16ColorType) + ? kRGBA_F16_SkColorType + : image_filter_color_type(priorDevice->imageInfo()); + SkImageInfo info = SkImageInfo::Make(layerBounds.width(), layerBounds.height(), + layerColorType, kPremul_SkAlphaType, + priorDevice->imageInfo().refColorSpace()); + + SkPixelGeometry geo = rec.fSaveLayerFlags & kPreserveLCDText_SaveLayerFlag + ? fProps.pixelGeometry() + : kUnknown_SkPixelGeometry; + const auto createInfo = SkBaseDevice::CreateInfo(info, geo, SkBaseDevice::kNever_TileUsage, + fAllocator.get()); + // Use the original paint as a hint so that it includes the image filter + newDevice.reset(priorDevice->onCreateDevice(createInfo, rec.fPaint)); + } + + bool initBackdrop = (rec.fSaveLayerFlags & kInitWithPrevious_SaveLayerFlag) || rec.fBackdrop; + if (!newDevice) { + // Either we weren't meant to allocate a full layer, or the full layer creation failed. + // Using an explicit NoPixelsDevice lets us reflect what the layer state would have been + // on success (or kFull_LayerStrategy) while squashing draw calls that target something that + // doesn't exist. + newDevice = sk_make_sp(SkIRect::MakeWH(layerBounds.width(), + layerBounds.height()), + fProps, this->imageInfo().refColorSpace()); + initBackdrop = false; + } + + // Configure device to match determined mapping for any image filters. + // The setDeviceCoordinateSystem applies the prior device's global transform since + // 'newLayerMapping' only defines the transforms between the two devices and it must be updated + // to the global coordinate system. + newDevice->setDeviceCoordinateSystem( + priorDevice->deviceToGlobal() * SkM44(newLayerMapping.layerToDevice()), + SkM44(newLayerMapping.deviceToLayer()) * priorDevice->globalToDevice(), + SkM44(newLayerMapping.layerMatrix()), + layerBounds.left(), + layerBounds.top()); + + if (initBackdrop) { + SkPaint backdropPaint; + const SkImageFilter* backdropFilter = optimize_layer_filter(rec.fBackdrop, &backdropPaint); + // The new device was constructed to be compatible with 'filter', not necessarily + // 'rec.fBackdrop', so allow DrawDeviceWithFilter to transform the prior device contents + // if necessary to evaluate the backdrop filter. If no filters are involved, then the + // devices differ by integer translations and are always compatible. + bool scaleBackdrop = rec.fExperimentalBackdropScale != 1.0f; + auto compat = (filter || backdropFilter || scaleBackdrop) + ? DeviceCompatibleWithFilter::kUnknown : DeviceCompatibleWithFilter::kYes; + this->internalDrawDeviceWithFilter(priorDevice, // src + newDevice.get(), // dst + backdropFilter, + backdropPaint, + compat, + rec.fExperimentalBackdropScale); + } + + fMCRec->newLayer(std::move(newDevice), sk_ref_sp(filter), restorePaint); + fQuickRejectBounds = this->computeDeviceClipBounds(); +} + +int SkCanvas::saveLayerAlphaf(const SkRect* bounds, float alpha) { + if (alpha >= 1.0f) { + return this->saveLayer(bounds, nullptr); + } else { + SkPaint tmpPaint; + tmpPaint.setAlphaf(alpha); + return this->saveLayer(bounds, &tmpPaint); + } +} + +void SkCanvas::internalSaveBehind(const SkRect* localBounds) { + SkBaseDevice* device = this->topDevice(); + + // Map the local bounds into the top device's coordinate space (this is not + // necessarily the full global CTM transform). + SkIRect devBounds; + if (localBounds) { + SkRect tmp; + device->localToDevice().mapRect(&tmp, *localBounds); + if (!devBounds.intersect(tmp.round(), device->devClipBounds())) { + devBounds.setEmpty(); + } + } else { + devBounds = device->devClipBounds(); + } + if (devBounds.isEmpty()) { + return; + } + + // This is getting the special image from the current device, which is then drawn into (both by + // a client, and the drawClippedToSaveBehind below). Since this is not saving a layer, with its + // own device, we need to explicitly copy the back image contents so that its original content + // is available when we splat it back later during restore. + auto backImage = device->snapSpecial(devBounds, /* forceCopy= */ true); + if (!backImage) { + return; + } + + // we really need the save, so we can wack the fMCRec + this->checkForDeferredSave(); + + fMCRec->fBackImage = + std::make_unique(BackImage{std::move(backImage), devBounds.topLeft()}); + + SkPaint paint; + paint.setBlendMode(SkBlendMode::kClear); + this->drawClippedToSaveBehind(paint); +} + +void SkCanvas::internalRestore() { + SkASSERT(!fMCStack.empty()); + + // now detach these from fMCRec so we can pop(). Gets freed after its drawn + std::unique_ptr layer = std::move(fMCRec->fLayer); + std::unique_ptr backImage = std::move(fMCRec->fBackImage); + + // now do the normal restore() + fMCRec->~MCRec(); // balanced in save() + fMCStack.pop_back(); + fMCRec = (MCRec*) fMCStack.back(); + + if (!fMCRec) { + // This was the last record, restored during the destruction of the SkCanvas + return; + } + + this->topDevice()->restore(fMCRec->fMatrix); + + if (backImage) { + SkPaint paint; + paint.setBlendMode(SkBlendMode::kDstOver); + this->topDevice()->drawSpecial(backImage->fImage.get(), + SkMatrix::Translate(backImage->fLoc), + SkSamplingOptions(), + paint); + } + + // Draw the layer's device contents into the now-current older device. We can't call public + // draw functions since we don't want to record them. + if (layer && !layer->fDevice->isNoPixelsDevice() && !layer->fDiscard) { + layer->fDevice->setImmutable(); + + // Don't go through AutoLayerForImageFilter since device draws are so closely tied to + // internalSaveLayer and internalRestore. + if (this->predrawNotify()) { + SkBaseDevice* dstDev = this->topDevice(); + if (layer->fImageFilter) { + this->internalDrawDeviceWithFilter(layer->fDevice.get(), // src + dstDev, // dst + layer->fImageFilter.get(), + layer->fPaint, + DeviceCompatibleWithFilter::kYes); + } else { + // NOTE: We don't just call internalDrawDeviceWithFilter with a null filter + // because we want to take advantage of overridden drawDevice functions for + // document-based devices. + SkSamplingOptions sampling; + dstDev->drawDevice(layer->fDevice.get(), sampling, layer->fPaint); + } + } + } + + // Reset the clip restriction if the restore went past the save point that had added it. + if (this->getSaveCount() < fClipRestrictionSaveCount) { + fClipRestrictionRect.setEmpty(); + fClipRestrictionSaveCount = -1; + } + // Update the quick-reject bounds in case the restore changed the top device or the + // removed save record had included modifications to the clip stack. + fQuickRejectBounds = this->computeDeviceClipBounds(); + this->validateClip(); +} + +sk_sp SkCanvas::makeSurface(const SkImageInfo& info, const SkSurfaceProps* props) { + if (nullptr == props) { + props = &fProps; + } + return this->onNewSurface(info, *props); +} + +sk_sp SkCanvas::onNewSurface(const SkImageInfo& info, const SkSurfaceProps& props) { + return this->baseDevice()->makeSurface(info, props); +} + +SkImageInfo SkCanvas::imageInfo() const { + return this->onImageInfo(); +} + +SkImageInfo SkCanvas::onImageInfo() const { + return this->baseDevice()->imageInfo(); +} + +bool SkCanvas::getProps(SkSurfaceProps* props) const { + return this->onGetProps(props, /*top=*/false); +} + +SkSurfaceProps SkCanvas::getBaseProps() const { + SkSurfaceProps props; + this->onGetProps(&props, /*top=*/false); + return props; +} + +SkSurfaceProps SkCanvas::getTopProps() const { + SkSurfaceProps props; + this->onGetProps(&props, /*top=*/true); + return props; +} + +bool SkCanvas::onGetProps(SkSurfaceProps* props, bool top) const { + if (props) { + *props = top ? topDevice()->surfaceProps() : fProps; + } + return true; +} + +bool SkCanvas::peekPixels(SkPixmap* pmap) { + return this->onPeekPixels(pmap); +} + +bool SkCanvas::onPeekPixels(SkPixmap* pmap) { + return this->baseDevice()->peekPixels(pmap); +} + +void* SkCanvas::accessTopLayerPixels(SkImageInfo* info, size_t* rowBytes, SkIPoint* origin) { + SkPixmap pmap; + if (!this->onAccessTopLayerPixels(&pmap)) { + return nullptr; + } + if (info) { + *info = pmap.info(); + } + if (rowBytes) { + *rowBytes = pmap.rowBytes(); + } + if (origin) { + // If the caller requested the origin, they presumably are expecting the returned pixels to + // be axis-aligned with the root canvas. If the top level device isn't axis aligned, that's + // not the case. Until we update accessTopLayerPixels() to accept a coord space matrix + // instead of an origin, just don't expose the pixels in that case. Note that this means + // that layers with complex coordinate spaces can still report their pixels if the caller + // does not ask for the origin (e.g. just to dump its output to a file, etc). + if (this->topDevice()->isPixelAlignedToGlobal()) { + *origin = this->topDevice()->getOrigin(); + } else { + return nullptr; + } + } + return pmap.writable_addr(); +} + +bool SkCanvas::onAccessTopLayerPixels(SkPixmap* pmap) { + return this->topDevice()->accessPixels(pmap); +} + +///////////////////////////////////////////////////////////////////////////// + +void SkCanvas::translate(SkScalar dx, SkScalar dy) { + if (dx || dy) { + this->checkForDeferredSave(); + fMCRec->fMatrix.preTranslate(dx, dy); + + this->topDevice()->setGlobalCTM(fMCRec->fMatrix); + + this->didTranslate(dx,dy); + } +} + +void SkCanvas::scale(SkScalar sx, SkScalar sy) { + if (sx != 1 || sy != 1) { + this->checkForDeferredSave(); + fMCRec->fMatrix.preScale(sx, sy); + + this->topDevice()->setGlobalCTM(fMCRec->fMatrix); + + this->didScale(sx, sy); + } +} + +void SkCanvas::rotate(SkScalar degrees) { + SkMatrix m; + m.setRotate(degrees); + this->concat(m); +} + +void SkCanvas::rotate(SkScalar degrees, SkScalar px, SkScalar py) { + SkMatrix m; + m.setRotate(degrees, px, py); + this->concat(m); +} + +void SkCanvas::skew(SkScalar sx, SkScalar sy) { + SkMatrix m; + m.setSkew(sx, sy); + this->concat(m); +} + +void SkCanvas::concat(const SkMatrix& matrix) { + if (matrix.isIdentity()) { + return; + } + this->concat(SkM44(matrix)); +} + +void SkCanvas::internalConcat44(const SkM44& m) { + this->checkForDeferredSave(); + + fMCRec->fMatrix.preConcat(m); + + this->topDevice()->setGlobalCTM(fMCRec->fMatrix); +} + +void SkCanvas::concat(const SkM44& m) { + this->internalConcat44(m); + // notify subclasses + this->didConcat44(m); +} + +void SkCanvas::internalSetMatrix(const SkM44& m) { + fMCRec->fMatrix = m; + + this->topDevice()->setGlobalCTM(fMCRec->fMatrix); +} + +void SkCanvas::setMatrix(const SkMatrix& matrix) { + this->setMatrix(SkM44(matrix)); +} + +void SkCanvas::setMatrix(const SkM44& m) { + this->checkForDeferredSave(); + this->internalSetMatrix(m); + this->didSetM44(m); +} + +void SkCanvas::resetMatrix() { + this->setMatrix(SkM44()); +} + +////////////////////////////////////////////////////////////////////////////// + +void SkCanvas::clipRect(const SkRect& rect, SkClipOp op, bool doAA) { + if (!rect.isFinite()) { + return; + } + this->checkForDeferredSave(); + ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; + this->onClipRect(rect.makeSorted(), op, edgeStyle); +} + +void SkCanvas::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle edgeStyle) { + SkASSERT(rect.isSorted()); + const bool isAA = kSoft_ClipEdgeStyle == edgeStyle; + + AutoUpdateQRBounds aqr(this); + this->topDevice()->clipRect(rect, op, isAA); +} + +void SkCanvas::androidFramework_setDeviceClipRestriction(const SkIRect& rect) { + // The device clip restriction is a surface-space rectangular intersection that cannot be + // drawn outside of. The rectangle is remembered so that subsequent resetClip calls still + // respect the restriction. Other than clip resetting, all clip operations restrict the set + // of renderable pixels, so once set, the restriction will be respected until the canvas + // save stack is restored past the point this function was invoked. Unfortunately, the current + // implementation relies on the clip stack of the underyling SkDevices, which leads to some + // awkward behavioral interactions (see skbug.com/12252). + // + // Namely, a canvas restore() could undo the clip restriction's rect, and if + // setDeviceClipRestriction were called at a nested save level, there's no way to undo just the + // prior restriction and re-apply the new one. It also only makes sense to apply to the base + // device; any other device for a saved layer will be clipped back to the base device during its + // matched restore. As such, we: + // - Remember the save count that added the clip restriction and reset the rect to empty when + // we've restored past that point to keep our state in sync with the device's clip stack. + // - We assert that we're on the base device when this is invoked. + // - We assert that setDeviceClipRestriction() is only called when there was no prior + // restriction (cannot re-restrict, and prior state must have been reset by restoring the + // canvas state). + // - Historically, the empty rect would reset the clip restriction but it only could do so + // partially since the device's clips wasn't adjusted. Resetting is now handled + // automatically via SkCanvas::restore(), so empty input rects are skipped. + SkASSERT(this->topDevice() == this->baseDevice()); // shouldn't be in a nested layer + // and shouldn't already have a restriction + SkASSERT(fClipRestrictionSaveCount < 0 && fClipRestrictionRect.isEmpty()); + + if (fClipRestrictionSaveCount < 0 && !rect.isEmpty()) { + fClipRestrictionRect = rect; + fClipRestrictionSaveCount = this->getSaveCount(); + + // A non-empty clip restriction immediately applies an intersection op (ignoring the ctm). + // so we have to resolve the save. + this->checkForDeferredSave(); + AutoUpdateQRBounds aqr(this); + // Use clipRegion() since that operates in canvas-space, whereas clipRect() would apply the + // device's current transform first. + this->topDevice()->clipRegion(SkRegion(rect), SkClipOp::kIntersect); + } +} + +void SkCanvas::internal_private_resetClip() { + this->checkForDeferredSave(); + this->onResetClip(); +} + +void SkCanvas::onResetClip() { + SkIRect deviceRestriction = this->topDevice()->imageInfo().bounds(); + if (fClipRestrictionSaveCount >= 0 && this->topDevice() == this->baseDevice()) { + // Respect the device clip restriction when resetting the clip if we're on the base device. + // If we're not on the base device, then the "reset" applies to the top device's clip stack, + // and the clip restriction will be respected automatically during a restore of the layer. + if (!deviceRestriction.intersect(fClipRestrictionRect)) { + deviceRestriction = SkIRect::MakeEmpty(); + } + } + + AutoUpdateQRBounds aqr(this); + this->topDevice()->replaceClip(deviceRestriction); +} + +void SkCanvas::clipRRect(const SkRRect& rrect, SkClipOp op, bool doAA) { + this->checkForDeferredSave(); + ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; + if (rrect.isRect()) { + this->onClipRect(rrect.getBounds(), op, edgeStyle); + } else { + this->onClipRRect(rrect, op, edgeStyle); + } +} + +void SkCanvas::onClipRRect(const SkRRect& rrect, SkClipOp op, ClipEdgeStyle edgeStyle) { + bool isAA = kSoft_ClipEdgeStyle == edgeStyle; + + AutoUpdateQRBounds aqr(this); + this->topDevice()->clipRRect(rrect, op, isAA); +} + +void SkCanvas::clipPath(const SkPath& path, SkClipOp op, bool doAA) { + this->checkForDeferredSave(); + ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; + + if (!path.isInverseFillType() && fMCRec->fMatrix.asM33().rectStaysRect()) { + SkRect r; + if (path.isRect(&r)) { + this->onClipRect(r, op, edgeStyle); + return; + } + SkRRect rrect; + if (path.isOval(&r)) { + rrect.setOval(r); + this->onClipRRect(rrect, op, edgeStyle); + return; + } + if (path.isRRect(&rrect)) { + this->onClipRRect(rrect, op, edgeStyle); + return; + } + } + + this->onClipPath(path, op, edgeStyle); +} + +void SkCanvas::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle edgeStyle) { + bool isAA = kSoft_ClipEdgeStyle == edgeStyle; + + AutoUpdateQRBounds aqr(this); + this->topDevice()->clipPath(path, op, isAA); +} + +void SkCanvas::clipShader(sk_sp sh, SkClipOp op) { + if (sh) { + if (sh->isOpaque()) { + if (op == SkClipOp::kIntersect) { + // we don't occlude anything, so skip this call + } else { + SkASSERT(op == SkClipOp::kDifference); + // we occlude everything, so set the clip to empty + this->clipRect({0,0,0,0}); + } + } else { + this->checkForDeferredSave(); + this->onClipShader(std::move(sh), op); + } + } +} + +void SkCanvas::onClipShader(sk_sp sh, SkClipOp op) { + AutoUpdateQRBounds aqr(this); + this->topDevice()->clipShader(sh, op); +} + +void SkCanvas::clipRegion(const SkRegion& rgn, SkClipOp op) { + this->checkForDeferredSave(); + this->onClipRegion(rgn, op); +} + +void SkCanvas::onClipRegion(const SkRegion& rgn, SkClipOp op) { + AutoUpdateQRBounds aqr(this); + this->topDevice()->clipRegion(rgn, op); +} + +void SkCanvas::validateClip() const { +#ifdef SK_DEBUG +#ifndef SK_DISABLE_SLOW_DEBUG_VALIDATION + SkRect tmp = this->computeDeviceClipBounds(); + if (this->isClipEmpty()) { + SkASSERT(fQuickRejectBounds.isEmpty()); + } else { + SkASSERT(tmp == fQuickRejectBounds); + } +#endif +#endif +} + +bool SkCanvas::androidFramework_isClipAA() const { + return this->topDevice()->onClipIsAA(); +} + +void SkCanvas::temporary_internal_getRgnClip(SkRegion* rgn) { + rgn->setEmpty(); + SkBaseDevice* device = this->topDevice(); + if (device && device->isPixelAlignedToGlobal()) { + device->onAsRgnClip(rgn); + SkIPoint origin = device->getOrigin(); + if (origin.x() | origin.y()) { + rgn->translate(origin.x(), origin.y()); + } + } +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkCanvas::isClipEmpty() const { + return this->topDevice()->onGetClipType() == SkBaseDevice::ClipType::kEmpty; +} + +bool SkCanvas::isClipRect() const { + return this->topDevice()->onGetClipType() == SkBaseDevice::ClipType::kRect; +} + +bool SkCanvas::quickReject(const SkRect& src) const { +#ifdef SK_DEBUG + // Verify that fQuickRejectBounds are set properly. + this->validateClip(); +#endif + + SkRect devRect = SkMatrixPriv::MapRect(fMCRec->fMatrix, src); + return !devRect.isFinite() || !devRect.intersects(fQuickRejectBounds); +} + +bool SkCanvas::quickReject(const SkPath& path) const { + return path.isEmpty() || this->quickReject(path.getBounds()); +} + +bool SkCanvas::internalQuickReject(const SkRect& bounds, const SkPaint& paint, + const SkMatrix* matrix) { + if (!bounds.isFinite() || paint.nothingToDraw()) { + return true; + } + + if (paint.canComputeFastBounds()) { + SkRect tmp = matrix ? matrix->mapRect(bounds) : bounds; + return this->quickReject(paint.computeFastBounds(tmp, &tmp)); + } + + return false; +} + + +SkRect SkCanvas::getLocalClipBounds() const { + SkIRect ibounds = this->getDeviceClipBounds(); + if (ibounds.isEmpty()) { + return SkRect::MakeEmpty(); + } + + SkMatrix inverse; + // if we can't invert the CTM, we can't return local clip bounds + if (!fMCRec->fMatrix.asM33().invert(&inverse)) { + return SkRect::MakeEmpty(); + } + + SkRect bounds; + // adjust it outwards in case we are antialiasing + const int margin = 1; + + SkRect r = SkRect::Make(ibounds.makeOutset(margin, margin)); + inverse.mapRect(&bounds, r); + return bounds; +} + +SkIRect SkCanvas::getDeviceClipBounds() const { + return this->computeDeviceClipBounds(/*outsetForAA=*/false).roundOut(); +} + +SkRect SkCanvas::computeDeviceClipBounds(bool outsetForAA) const { + const SkBaseDevice* dev = this->topDevice(); + if (dev->onGetClipType() == SkBaseDevice::ClipType::kEmpty) { + return SkRect::MakeEmpty(); + } else { + SkRect devClipBounds = + SkMatrixPriv::MapRect(dev->deviceToGlobal(), SkRect::Make(dev->devClipBounds())); + if (outsetForAA) { + // Expand bounds out by 1 in case we are anti-aliasing. We store the + // bounds as floats to enable a faster quick reject implementation. + devClipBounds.outset(1.f, 1.f); + } + return devClipBounds; + } +} + +/////////////////////////////////////////////////////////////////////// + +SkMatrix SkCanvas::getTotalMatrix() const { + return fMCRec->fMatrix.asM33(); +} + +SkM44 SkCanvas::getLocalToDevice() const { + return fMCRec->fMatrix; +} + +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) && defined(SK_GANESH) + +SkIRect SkCanvas::topLayerBounds() const { + return this->topDevice()->getGlobalBounds(); +} + +GrBackendRenderTarget SkCanvas::topLayerBackendRenderTarget() const { + auto proxy = SkCanvasPriv::TopDeviceTargetProxy(const_cast(this)); + if (!proxy) { + return {}; + } + const GrRenderTarget* renderTarget = proxy->peekRenderTarget(); + return renderTarget ? renderTarget->getBackendRenderTarget() : GrBackendRenderTarget(); +} +#endif + +GrRecordingContext* SkCanvas::recordingContext() { +#if defined(SK_GANESH) + if (auto gpuDevice = this->topDevice()->asGaneshDevice()) { + return gpuDevice->recordingContext(); + } +#endif + + return nullptr; +} + +skgpu::graphite::Recorder* SkCanvas::recorder() { +#if defined(SK_GRAPHITE) + if (auto graphiteDevice = this->topDevice()->asGraphiteDevice()) { + return graphiteDevice->recorder(); + } +#endif + + return nullptr; +} + + +void SkCanvas::drawDRRect(const SkRRect& outer, const SkRRect& inner, + const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (outer.isEmpty()) { + return; + } + if (inner.isEmpty()) { + this->drawRRect(outer, paint); + return; + } + + // We don't have this method (yet), but technically this is what we should + // be able to return ... + // if (!outer.contains(inner))) { + // + // For now at least check for containment of bounds + if (!outer.getBounds().contains(inner.getBounds())) { + return; + } + + this->onDrawDRRect(outer, inner, paint); +} + +void SkCanvas::drawPaint(const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + this->onDrawPaint(paint); +} + +void SkCanvas::drawRect(const SkRect& r, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + // To avoid redundant logic in our culling code and various backends, we always sort rects + // before passing them along. + this->onDrawRect(r.makeSorted(), paint); +} + +void SkCanvas::drawClippedToSaveBehind(const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + this->onDrawBehind(paint); +} + +void SkCanvas::drawRegion(const SkRegion& region, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (region.isEmpty()) { + return; + } + + if (region.isRect()) { + return this->drawIRect(region.getBounds(), paint); + } + + this->onDrawRegion(region, paint); +} + +void SkCanvas::drawOval(const SkRect& r, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + // To avoid redundant logic in our culling code and various backends, we always sort rects + // before passing them along. + this->onDrawOval(r.makeSorted(), paint); +} + +void SkCanvas::drawRRect(const SkRRect& rrect, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + this->onDrawRRect(rrect, paint); +} + +void SkCanvas::drawPoints(PointMode mode, size_t count, const SkPoint pts[], const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + this->onDrawPoints(mode, count, pts, paint); +} + +void SkCanvas::drawVertices(const sk_sp& vertices, SkBlendMode mode, + const SkPaint& paint) { + this->drawVertices(vertices.get(), mode, paint); +} + +void SkCanvas::drawVertices(const SkVertices* vertices, SkBlendMode mode, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + RETURN_ON_NULL(vertices); + + // We expect fans to be converted to triangles when building or deserializing SkVertices. + SkASSERT(vertices->priv().mode() != SkVertices::kTriangleFan_VertexMode); + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + // Preserve legacy behavior for Android: ignore the SkShader if there are no texCoords present + if (paint.getShader() && !vertices->priv().hasTexCoords()) { + SkPaint noShaderPaint(paint); + noShaderPaint.setShader(nullptr); + this->onDrawVerticesObject(vertices, mode, noShaderPaint); + return; + } +#endif + this->onDrawVerticesObject(vertices, mode, paint); +} + +#ifdef SK_ENABLE_SKSL +void SkCanvas::drawMesh(const SkMesh& mesh, sk_sp blender, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + RETURN_ON_FALSE(mesh.isValid()); + if (!blender) { + blender = SkBlender::Mode(SkBlendMode::kModulate); + } + this->onDrawMesh(mesh, std::move(blender), paint); +} +#endif + +void SkCanvas::drawPath(const SkPath& path, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + this->onDrawPath(path, paint); +} + +// Returns true if the rect can be "filled" : non-empty and finite +static bool fillable(const SkRect& r) { + SkScalar w = r.width(); + SkScalar h = r.height(); + return SkScalarIsFinite(w) && w > 0 && SkScalarIsFinite(h) && h > 0; +} + +static SkPaint clean_paint_for_lattice(const SkPaint* paint) { + SkPaint cleaned; + if (paint) { + cleaned = *paint; + cleaned.setMaskFilter(nullptr); + cleaned.setAntiAlias(false); + } + return cleaned; +} + +void SkCanvas::drawImageNine(const SkImage* image, const SkIRect& center, const SkRect& dst, + SkFilterMode filter, const SkPaint* paint) { + RETURN_ON_NULL(image); + + const int xdivs[] = {center.fLeft, center.fRight}; + const int ydivs[] = {center.fTop, center.fBottom}; + + Lattice lat; + lat.fXDivs = xdivs; + lat.fYDivs = ydivs; + lat.fRectTypes = nullptr; + lat.fXCount = lat.fYCount = 2; + lat.fBounds = nullptr; + lat.fColors = nullptr; + this->drawImageLattice(image, lat, dst, filter, paint); +} + +void SkCanvas::drawImageLattice(const SkImage* image, const Lattice& lattice, const SkRect& dst, + SkFilterMode filter, const SkPaint* paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + RETURN_ON_NULL(image); + if (dst.isEmpty()) { + return; + } + + SkIRect bounds; + Lattice latticePlusBounds = lattice; + if (!latticePlusBounds.fBounds) { + bounds = SkIRect::MakeWH(image->width(), image->height()); + latticePlusBounds.fBounds = &bounds; + } + + SkPaint latticePaint = clean_paint_for_lattice(paint); + if (SkLatticeIter::Valid(image->width(), image->height(), latticePlusBounds)) { + this->onDrawImageLattice2(image, latticePlusBounds, dst, filter, &latticePaint); + } else { + this->drawImageRect(image, SkRect::MakeIWH(image->width(), image->height()), dst, + SkSamplingOptions(filter), &latticePaint, kStrict_SrcRectConstraint); + } +} + +void SkCanvas::drawAtlas(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[], + const SkColor colors[], int count, SkBlendMode mode, + const SkSamplingOptions& sampling, const SkRect* cull, + const SkPaint* paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + RETURN_ON_NULL(atlas); + if (count <= 0) { + return; + } + SkASSERT(atlas); + SkASSERT(tex); + this->onDrawAtlas2(atlas, xform, tex, colors, count, mode, sampling, cull, paint); +} + +void SkCanvas::drawAnnotation(const SkRect& rect, const char key[], SkData* value) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (key) { + this->onDrawAnnotation(rect, key, value); + } +} + +void SkCanvas::private_draw_shadow_rec(const SkPath& path, const SkDrawShadowRec& rec) { + TRACE_EVENT0("skia", TRACE_FUNC); + this->onDrawShadowRec(path, rec); +} + +void SkCanvas::onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) { + // We don't test quickReject because the shadow outsets the path's bounds. + // TODO(michaelludwig): Is it worth calling SkDrawShadowMetrics::GetLocalBounds here? + if (!this->predrawNotify()) { + return; + } + this->topDevice()->drawShadow(path, rec); +} + +void SkCanvas::experimental_DrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], + QuadAAFlags aaFlags, const SkColor4f& color, + SkBlendMode mode) { + TRACE_EVENT0("skia", TRACE_FUNC); + // Make sure the rect is sorted before passing it along + this->onDrawEdgeAAQuad(rect.makeSorted(), clip, aaFlags, color, mode); +} + +void SkCanvas::experimental_DrawEdgeAAImageSet(const ImageSetEntry imageSet[], int cnt, + const SkPoint dstClips[], + const SkMatrix preViewMatrices[], + const SkSamplingOptions& sampling, + const SkPaint* paint, + SrcRectConstraint constraint) { + TRACE_EVENT0("skia", TRACE_FUNC); + this->onDrawEdgeAAImageSet2(imageSet, cnt, dstClips, preViewMatrices, sampling, paint, + constraint); +} + +////////////////////////////////////////////////////////////////////////////// +// These are the virtual drawing methods +////////////////////////////////////////////////////////////////////////////// + +void SkCanvas::onDiscard() { + if (fSurfaceBase) { + sk_ignore_unused_variable(fSurfaceBase->aboutToDraw(SkSurface::kDiscard_ContentChangeMode)); + } +} + +void SkCanvas::onDrawPaint(const SkPaint& paint) { + this->internalDrawPaint(paint); +} + +void SkCanvas::internalDrawPaint(const SkPaint& paint) { + // drawPaint does not call internalQuickReject() because computing its geometry is not free + // (see getLocalClipBounds(), and the two conditions below are sufficient. + if (paint.nothingToDraw() || this->isClipEmpty()) { + return; + } + + auto layer = this->aboutToDraw(this, paint, nullptr, CheckForOverwrite::kYes); + if (layer) { + this->topDevice()->drawPaint(layer->paint()); + } +} + +void SkCanvas::onDrawPoints(PointMode mode, size_t count, const SkPoint pts[], + const SkPaint& paint) { + if ((long)count <= 0 || paint.nothingToDraw()) { + return; + } + SkASSERT(pts != nullptr); + + SkRect bounds; + // Compute bounds from points (common for drawing a single line) + if (count == 2) { + bounds.set(pts[0], pts[1]); + } else { + bounds.setBounds(pts, SkToInt(count)); + } + + // Enforce paint style matches implicit behavior of drawPoints + SkPaint strokePaint = paint; + strokePaint.setStyle(SkPaint::kStroke_Style); + if (this->internalQuickReject(bounds, strokePaint)) { + return; + } + + auto layer = this->aboutToDraw(this, strokePaint, &bounds); + if (layer) { + this->topDevice()->drawPoints(mode, count, pts, layer->paint()); + } +} + +void SkCanvas::onDrawRect(const SkRect& r, const SkPaint& paint) { + SkASSERT(r.isSorted()); + if (this->internalQuickReject(r, paint)) { + return; + } + + auto layer = this->aboutToDraw(this, paint, &r, CheckForOverwrite::kYes); + if (layer) { + this->topDevice()->drawRect(r, layer->paint()); + } +} + +void SkCanvas::onDrawRegion(const SkRegion& region, const SkPaint& paint) { + const SkRect bounds = SkRect::Make(region.getBounds()); + if (this->internalQuickReject(bounds, paint)) { + return; + } + + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + this->topDevice()->drawRegion(region, layer->paint()); + } +} + +void SkCanvas::onDrawBehind(const SkPaint& paint) { + SkBaseDevice* dev = this->topDevice(); + if (!dev) { + return; + } + + SkIRect bounds; + SkDeque::Iter iter(fMCStack, SkDeque::Iter::kBack_IterStart); + for (;;) { + const MCRec* rec = (const MCRec*)iter.prev(); + if (!rec) { + return; // no backimages, so nothing to draw + } + if (rec->fBackImage) { + // drawBehind should only have been called when the saveBehind record is active; + // if this fails, it means a real saveLayer was made w/o being restored first. + SkASSERT(dev == rec->fDevice); + bounds = SkIRect::MakeXYWH(rec->fBackImage->fLoc.fX, rec->fBackImage->fLoc.fY, + rec->fBackImage->fImage->width(), + rec->fBackImage->fImage->height()); + break; + } + } + + // The backimage location (and thus bounds) were defined in the device's space, so mark it + // as a clip. We use a clip instead of just drawing a rect in case the paint has an image + // filter on it (which is applied before any auto-layer so the filter is clipped). + dev->save(); + { + // We also have to temporarily whack the device matrix since clipRegion is affected by the + // global-to-device matrix and clipRect is affected by the local-to-device. + SkAutoDeviceTransformRestore adtr(dev, SkMatrix::I()); + dev->clipRect(SkRect::Make(bounds), SkClipOp::kIntersect, /* aa */ false); + // ~adtr will reset the local-to-device matrix so that drawPaint() shades correctly. + } + + auto layer = this->aboutToDraw(this, paint); + if (layer) { + this->topDevice()->drawPaint(layer->paint()); + } + + dev->restore(fMCRec->fMatrix); +} + +void SkCanvas::onDrawOval(const SkRect& oval, const SkPaint& paint) { + SkASSERT(oval.isSorted()); + if (this->internalQuickReject(oval, paint)) { + return; + } + + auto layer = this->aboutToDraw(this, paint, &oval); + if (layer) { + this->topDevice()->drawOval(oval, layer->paint()); + } +} + +void SkCanvas::onDrawArc(const SkRect& oval, SkScalar startAngle, + SkScalar sweepAngle, bool useCenter, + const SkPaint& paint) { + SkASSERT(oval.isSorted()); + if (this->internalQuickReject(oval, paint)) { + return; + } + + auto layer = this->aboutToDraw(this, paint, &oval); + if (layer) { + this->topDevice()->drawArc(oval, startAngle, sweepAngle, useCenter, layer->paint()); + } +} + +void SkCanvas::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) { + const SkRect& bounds = rrect.getBounds(); + + // Delegating to simpler draw operations + if (rrect.isRect()) { + // call the non-virtual version + this->SkCanvas::drawRect(bounds, paint); + return; + } else if (rrect.isOval()) { + // call the non-virtual version + this->SkCanvas::drawOval(bounds, paint); + return; + } + + if (this->internalQuickReject(bounds, paint)) { + return; + } + + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + this->topDevice()->drawRRect(rrect, layer->paint()); + } +} + +void SkCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) { + const SkRect& bounds = outer.getBounds(); + if (this->internalQuickReject(bounds, paint)) { + return; + } + + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + this->topDevice()->drawDRRect(outer, inner, layer->paint()); + } +} + +void SkCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) { + if (!path.isFinite()) { + return; + } + + const SkRect& pathBounds = path.getBounds(); + if (!path.isInverseFillType() && this->internalQuickReject(pathBounds, paint)) { + return; + } + if (path.isInverseFillType() && pathBounds.width() <= 0 && pathBounds.height() <= 0) { + this->internalDrawPaint(paint); + return; + } + + auto layer = this->aboutToDraw(this, paint, path.isInverseFillType() ? nullptr : &pathBounds); + if (layer) { + this->topDevice()->drawPath(path, layer->paint()); + } +} + +bool SkCanvas::canDrawBitmapAsSprite(SkScalar x, SkScalar y, int w, int h, + const SkSamplingOptions& sampling, const SkPaint& paint) { + if (!paint.getImageFilter()) { + return false; + } + + const SkMatrix& ctm = this->getTotalMatrix(); + if (!SkTreatAsSprite(ctm, SkISize::Make(w, h), sampling, paint.isAntiAlias())) { + return false; + } + + // The other paint effects need to be applied before the image filter, but the sprite draw + // applies the filter explicitly first. + if (paint.getAlphaf() < 1.f || paint.getColorFilter() || paint.getMaskFilter()) { + return false; + } + // Currently we can only use the filterSprite code if we are clipped to the bitmap's bounds. + // Once we can filter and the filter will return a result larger than itself, we should be + // able to remove this constraint. + // skbug.com/4526 + // + SkPoint pt; + ctm.mapXY(x, y, &pt); + SkIRect ir = SkIRect::MakeXYWH(SkScalarRoundToInt(pt.x()), SkScalarRoundToInt(pt.y()), w, h); + // quick bounds have been outset by 1px compared to overall device bounds, so this makes the + // contains check equivalent to between ir and device bounds + ir.outset(1, 1); + return ir.contains(fQuickRejectBounds); +} + +// Clean-up the paint to match the drawing semantics for drawImage et al. (skbug.com/7804). +static SkPaint clean_paint_for_drawImage(const SkPaint* paint) { + SkPaint cleaned; + if (paint) { + cleaned = *paint; + cleaned.setStyle(SkPaint::kFill_Style); + cleaned.setPathEffect(nullptr); + } + return cleaned; +} + +// drawVertices fills triangles and ignores mask filter and path effect, +// so canonicalize the paint before checking quick reject. +static SkPaint clean_paint_for_drawVertices(SkPaint paint) { + paint.setStyle(SkPaint::kFill_Style); + paint.setMaskFilter(nullptr); + paint.setPathEffect(nullptr); + return paint; +} + +void SkCanvas::onDrawImage2(const SkImage* image, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint) { + SkPaint realPaint = clean_paint_for_drawImage(paint); + + SkRect bounds = SkRect::MakeXYWH(x, y, image->width(), image->height()); + if (this->internalQuickReject(bounds, realPaint)) { + return; + } + + if (realPaint.getImageFilter() && + this->canDrawBitmapAsSprite(x, y, image->width(), image->height(), sampling, realPaint) && + !image_to_color_filter(&realPaint)) { + // Evaluate the image filter directly on the input image and then draw the result, instead + // of first drawing the image to a temporary layer and filtering. + SkBaseDevice* device = this->topDevice(); + sk_sp special; + if ((special = device->makeSpecial(image))) { + sk_sp filter = realPaint.refImageFilter(); + realPaint.setImageFilter(nullptr); + + // TODO(michaelludwig) - Many filters could probably be evaluated like this even if the + // CTM is not translate-only; the post-transformation of the filtered image by the CTM + // will probably look just as good and not require an extra layer. + // TODO(michaelludwig) - Once image filter implementations can support source images + // with non-(0,0) origins, we can just mark the origin as (x,y) instead of doing a + // pre-concat here. + SkMatrix layerToDevice = device->localToDevice(); + layerToDevice.preTranslate(x, y); + + SkMatrix deviceToLayer; + if (!layerToDevice.invert(&deviceToLayer)) { + return; // bad ctm, draw nothing + } + + skif::Mapping mapping(layerToDevice, deviceToLayer, SkMatrix::Translate(-x, -y)); + + if (this->predrawNotify()) { + // While we are skipping an initial layer, evaluate the rest of the image filter + // pipeline in the same color format as we would have if there was a layer. + const auto filterColorType = image_filter_color_type(device->imageInfo()); + device->drawFilteredImage(mapping, special.get(), filterColorType, filter.get(), + sampling,realPaint); + } + return; + } // else fall through to regular drawing path + } + + auto layer = this->aboutToDraw(this, realPaint, &bounds); + if (layer) { + this->topDevice()->drawImageRect(image, nullptr, bounds, sampling, + layer->paint(), kFast_SrcRectConstraint); + } +} + +static SkSamplingOptions clean_sampling_for_constraint( + const SkSamplingOptions& sampling, + SkCanvas::SrcRectConstraint constraint) { + if (constraint == SkCanvas::kStrict_SrcRectConstraint) { + if (sampling.mipmap != SkMipmapMode::kNone) { + return SkSamplingOptions(sampling.filter); + } + if (sampling.isAniso()) { + return SkSamplingOptions(SkFilterMode::kLinear); + } + } + return sampling; +} + +void SkCanvas::onDrawImageRect2(const SkImage* image, const SkRect& src, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint* paint, + SrcRectConstraint constraint) { + SkPaint realPaint = clean_paint_for_drawImage(paint); + SkSamplingOptions realSampling = clean_sampling_for_constraint(sampling, constraint); + + if (this->internalQuickReject(dst, realPaint)) { + return; + } + + auto layer = this->aboutToDraw(this, realPaint, &dst, CheckForOverwrite::kYes, + image->isOpaque() ? kOpaque_ShaderOverrideOpacity + : kNotOpaque_ShaderOverrideOpacity); + if (layer) { + this->topDevice()->drawImageRect(image, &src, dst, realSampling, layer->paint(), constraint); + } +} + +void SkCanvas::onDrawImageLattice2(const SkImage* image, const Lattice& lattice, const SkRect& dst, + SkFilterMode filter, const SkPaint* paint) { + SkPaint realPaint = clean_paint_for_drawImage(paint); + + if (this->internalQuickReject(dst, realPaint)) { + return; + } + + auto layer = this->aboutToDraw(this, realPaint, &dst); + if (layer) { + this->topDevice()->drawImageLattice(image, lattice, dst, filter, layer->paint()); + } +} + +void SkCanvas::drawImage(const SkImage* image, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + RETURN_ON_NULL(image); + this->onDrawImage2(image, x, y, sampling, paint); +} + +void SkCanvas::drawImageRect(const SkImage* image, const SkRect& src, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint* paint, + SrcRectConstraint constraint) { + RETURN_ON_NULL(image); + if (!fillable(dst) || !fillable(src)) { + return; + } + this->onDrawImageRect2(image, src, dst, sampling, paint, constraint); +} + +void SkCanvas::drawImageRect(const SkImage* image, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint* paint) { + RETURN_ON_NULL(image); + this->drawImageRect(image, SkRect::MakeIWH(image->width(), image->height()), dst, sampling, + paint, kFast_SrcRectConstraint); +} + +void SkCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) { + auto glyphRunList = fScratchGlyphRunBuilder->blobToGlyphRunList(*blob, {x, y}); + this->onDrawGlyphRunList(glyphRunList, paint); +} + +void SkCanvas::onDrawGlyphRunList(const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) { + SkRect bounds = glyphRunList.sourceBoundsWithOrigin(); + if (this->internalQuickReject(bounds, paint)) { + return; + } + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + this->topDevice()->drawGlyphRunList(this, glyphRunList, paint, layer->paint()); + } +} + +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) +sk_sp SkCanvas::convertBlobToSlug( + const SkTextBlob& blob, SkPoint origin, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + auto glyphRunList = fScratchGlyphRunBuilder->blobToGlyphRunList(blob, origin); + return this->onConvertGlyphRunListToSlug(glyphRunList, paint); +} + +sk_sp +SkCanvas::onConvertGlyphRunListToSlug( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) { + SkRect bounds = glyphRunList.sourceBoundsWithOrigin(); + if (bounds.isEmpty() || !bounds.isFinite() || paint.nothingToDraw()) { + return nullptr; + } + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + return this->topDevice()->convertGlyphRunListToSlug(glyphRunList, paint, layer->paint()); + } + return nullptr; +} + +void SkCanvas::drawSlug(const Slug* slug) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (slug) { + this->onDrawSlug(slug); + } +} + +void SkCanvas::onDrawSlug(const Slug* slug) { + SkRect bounds = slug->sourceBoundsWithOrigin(); + if (this->internalQuickReject(bounds, slug->initialPaint())) { + return; + } + + auto layer = this->aboutToDraw(this, slug->initialPaint(), &bounds); + if (layer) { + this->topDevice()->drawSlug(this, slug, layer->paint()); + } +} +#endif + +// These call the (virtual) onDraw... method +void SkCanvas::drawSimpleText(const void* text, size_t byteLength, SkTextEncoding encoding, + SkScalar x, SkScalar y, const SkFont& font, const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (byteLength) { + sk_msan_assert_initialized(text, SkTAddOffset(text, byteLength)); + const sktext::GlyphRunList& glyphRunList = + fScratchGlyphRunBuilder->textToGlyphRunList( + font, paint, text, byteLength, {x, y}, encoding); + if (!glyphRunList.empty()) { + this->onDrawGlyphRunList(glyphRunList, paint); + } + } +} + +void SkCanvas::drawGlyphs(int count, const SkGlyphID* glyphs, const SkPoint* positions, + const uint32_t* clusters, int textByteCount, const char* utf8text, + SkPoint origin, const SkFont& font, const SkPaint& paint) { + if (count <= 0) { return; } + + sktext::GlyphRun glyphRun { + font, + SkSpan(positions, count), + SkSpan(glyphs, count), + SkSpan(utf8text, textByteCount), + SkSpan(clusters, count), + SkSpan() + }; + + sktext::GlyphRunList glyphRunList = fScratchGlyphRunBuilder->makeGlyphRunList( + glyphRun, paint, origin); + this->onDrawGlyphRunList(glyphRunList, paint); +} + +void SkCanvas::drawGlyphs(int count, const SkGlyphID glyphs[], const SkPoint positions[], + SkPoint origin, const SkFont& font, const SkPaint& paint) { + if (count <= 0) { return; } + + sktext::GlyphRun glyphRun { + font, + SkSpan(positions, count), + SkSpan(glyphs, count), + SkSpan(), + SkSpan(), + SkSpan() + }; + + sktext::GlyphRunList glyphRunList = fScratchGlyphRunBuilder->makeGlyphRunList( + glyphRun, paint, origin); + this->onDrawGlyphRunList(glyphRunList, paint); +} + +void SkCanvas::drawGlyphs(int count, const SkGlyphID glyphs[], const SkRSXform xforms[], + SkPoint origin, const SkFont& font, const SkPaint& paint) { + if (count <= 0) { return; } + + auto [positions, rotateScales] = + fScratchGlyphRunBuilder->convertRSXForm(SkSpan(xforms, count)); + + sktext::GlyphRun glyphRun { + font, + positions, + SkSpan(glyphs, count), + SkSpan(), + SkSpan(), + rotateScales + }; + sktext::GlyphRunList glyphRunList = fScratchGlyphRunBuilder->makeGlyphRunList( + glyphRun, paint, origin); + this->onDrawGlyphRunList(glyphRunList, paint); +} + +#if defined(SK_GANESH) && GR_TEST_UTILS +bool gSkBlobAsSlugTesting = false; +#endif + +void SkCanvas::drawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + RETURN_ON_NULL(blob); + RETURN_ON_FALSE(blob->bounds().makeOffset(x, y).isFinite()); + + // Overflow if more than 2^21 glyphs stopping a buffer overflow latter in the stack. + // See chromium:1080481 + // TODO: can consider unrolling a few at a time if this limit becomes a problem. + int totalGlyphCount = 0; + constexpr int kMaxGlyphCount = 1 << 21; + SkTextBlob::Iter i(*blob); + SkTextBlob::Iter::Run r; + while (i.next(&r)) { + int glyphsLeft = kMaxGlyphCount - totalGlyphCount; + RETURN_ON_FALSE(r.fGlyphCount <= glyphsLeft); + totalGlyphCount += r.fGlyphCount; + } + +#if defined(SK_GANESH) && GR_TEST_UTILS + // Draw using text blob normally or if the blob has RSX form because slugs can't convert that + // form. + if (!gSkBlobAsSlugTesting || + this->topDevice()->asGaneshDevice() == nullptr || + SkTextBlobPriv::HasRSXForm(*blob)) +#endif + { + this->onDrawTextBlob(blob, x, y, paint); + } +#if defined(SK_GANESH) && GR_TEST_UTILS + else { + auto slug = Slug::ConvertBlob(this, *blob, {x, y}, paint); + slug->draw(this); + } +#endif +} + +void SkCanvas::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode bmode, + const SkPaint& paint) { + SkPaint simplePaint = clean_paint_for_drawVertices(paint); + + const SkRect& bounds = vertices->bounds(); + if (this->internalQuickReject(bounds, simplePaint)) { + return; + } + + auto layer = this->aboutToDraw(this, simplePaint, &bounds); + if (layer) { + this->topDevice()->drawVertices(vertices, SkBlender::Mode(bmode), layer->paint()); + } +} + +#ifdef SK_ENABLE_SKSL +void SkCanvas::onDrawMesh(const SkMesh& mesh, sk_sp blender, const SkPaint& paint) { + SkPaint simplePaint = clean_paint_for_drawVertices(paint); + + if (this->internalQuickReject(mesh.bounds(), simplePaint)) { + return; + } + + auto layer = this->aboutToDraw(this, simplePaint, nullptr); + if (layer) { + this->topDevice()->drawMesh(mesh, std::move(blender), paint); + } +} +#endif + +void SkCanvas::drawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode bmode, + const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (nullptr == cubics) { + return; + } + + this->onDrawPatch(cubics, colors, texCoords, bmode, paint); +} + +void SkCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode bmode, + const SkPaint& paint) { + // drawPatch has the same behavior restrictions as drawVertices + SkPaint simplePaint = clean_paint_for_drawVertices(paint); + + // Since a patch is always within the convex hull of the control points, we discard it when its + // bounding rectangle is completely outside the current clip. + SkRect bounds; + bounds.setBounds(cubics, SkPatchUtils::kNumCtrlPts); + if (this->internalQuickReject(bounds, simplePaint)) { + return; + } + + auto layer = this->aboutToDraw(this, simplePaint, &bounds); + if (layer) { + this->topDevice()->drawPatch(cubics, colors, texCoords, SkBlender::Mode(bmode), + layer->paint()); + } +} + +void SkCanvas::drawDrawable(SkDrawable* dr, SkScalar x, SkScalar y) { +#ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK + TRACE_EVENT0("skia", TRACE_FUNC); +#endif + RETURN_ON_NULL(dr); + if (x || y) { + SkMatrix matrix = SkMatrix::Translate(x, y); + this->onDrawDrawable(dr, &matrix); + } else { + this->onDrawDrawable(dr, nullptr); + } +} + +void SkCanvas::drawDrawable(SkDrawable* dr, const SkMatrix* matrix) { +#ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK + TRACE_EVENT0("skia", TRACE_FUNC); +#endif + RETURN_ON_NULL(dr); + if (matrix && matrix->isIdentity()) { + matrix = nullptr; + } + this->onDrawDrawable(dr, matrix); +} + +void SkCanvas::onDrawDrawable(SkDrawable* dr, const SkMatrix* matrix) { + // drawable bounds are no longer reliable (e.g. android displaylist) + // so don't use them for quick-reject + if (this->predrawNotify()) { + this->topDevice()->drawDrawable(this, dr, matrix); + } +} + +void SkCanvas::onDrawAtlas2(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[], + const SkColor colors[], int count, SkBlendMode bmode, + const SkSamplingOptions& sampling, const SkRect* cull, + const SkPaint* paint) { + // drawAtlas is a combination of drawVertices and drawImage... + SkPaint realPaint = clean_paint_for_drawVertices(clean_paint_for_drawImage(paint)); + realPaint.setShader(atlas->makeShader(sampling)); + + if (cull && this->internalQuickReject(*cull, realPaint)) { + return; + } + + auto layer = this->aboutToDraw(this, realPaint); + if (layer) { + this->topDevice()->drawAtlas(xform, tex, colors, count, SkBlender::Mode(bmode), + layer->paint()); + } +} + +void SkCanvas::onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) { + SkASSERT(key); + + if (this->predrawNotify()) { + this->topDevice()->drawAnnotation(rect, key, value); + } +} + +void SkCanvas::onDrawEdgeAAQuad(const SkRect& r, const SkPoint clip[4], QuadAAFlags edgeAA, + const SkColor4f& color, SkBlendMode mode) { + SkASSERT(r.isSorted()); + + SkPaint paint{color}; + paint.setBlendMode(mode); + if (this->internalQuickReject(r, paint)) { + return; + } + + if (this->predrawNotify()) { + this->topDevice()->drawEdgeAAQuad(r, clip, edgeAA, color, mode); + } +} + +void SkCanvas::onDrawEdgeAAImageSet2(const ImageSetEntry imageSet[], int count, + const SkPoint dstClips[], const SkMatrix preViewMatrices[], + const SkSamplingOptions& sampling, const SkPaint* paint, + SrcRectConstraint constraint) { + if (count <= 0) { + // Nothing to draw + return; + } + + SkPaint realPaint = clean_paint_for_drawImage(paint); + SkSamplingOptions realSampling = clean_sampling_for_constraint(sampling, constraint); + + // We could calculate the set's dstRect union to always check quickReject(), but we can't reject + // individual entries and Chromium's occlusion culling already makes it likely that at least one + // entry will be visible. So, we only calculate the draw bounds when it's trivial (count == 1), + // or we need it for the autolooper (since it greatly improves image filter perf). + bool needsAutoLayer = SkToBool(realPaint.getImageFilter()); + bool setBoundsValid = count == 1 || needsAutoLayer; + SkRect setBounds = imageSet[0].fDstRect; + if (imageSet[0].fMatrixIndex >= 0) { + // Account for the per-entry transform that is applied prior to the CTM when drawing + preViewMatrices[imageSet[0].fMatrixIndex].mapRect(&setBounds); + } + if (needsAutoLayer) { + for (int i = 1; i < count; ++i) { + SkRect entryBounds = imageSet[i].fDstRect; + if (imageSet[i].fMatrixIndex >= 0) { + preViewMatrices[imageSet[i].fMatrixIndex].mapRect(&entryBounds); + } + setBounds.joinPossiblyEmptyRect(entryBounds); + } + } + + // If we happen to have the draw bounds, though, might as well check quickReject(). + if (setBoundsValid && this->internalQuickReject(setBounds, realPaint)) { + return; + } + + auto layer = this->aboutToDraw(this, realPaint, setBoundsValid ? &setBounds : nullptr); + if (layer) { + this->topDevice()->drawEdgeAAImageSet(imageSet, count, dstClips, preViewMatrices, + realSampling, layer->paint(), constraint); + } +} + +////////////////////////////////////////////////////////////////////////////// +// These methods are NOT virtual, and therefore must call back into virtual +// methods, rather than actually drawing themselves. +////////////////////////////////////////////////////////////////////////////// + +void SkCanvas::drawColor(const SkColor4f& c, SkBlendMode mode) { + SkPaint paint; + paint.setColor(c); + paint.setBlendMode(mode); + this->drawPaint(paint); +} + +void SkCanvas::drawPoint(SkScalar x, SkScalar y, const SkPaint& paint) { + const SkPoint pt = { x, y }; + this->drawPoints(kPoints_PointMode, 1, &pt, paint); +} + +void SkCanvas::drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, const SkPaint& paint) { + SkPoint pts[2]; + pts[0].set(x0, y0); + pts[1].set(x1, y1); + this->drawPoints(kLines_PointMode, 2, pts, paint); +} + +void SkCanvas::drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, const SkPaint& paint) { + if (radius < 0) { + radius = 0; + } + + SkRect r; + r.setLTRB(cx - radius, cy - radius, cx + radius, cy + radius); + this->drawOval(r, paint); +} + +void SkCanvas::drawRoundRect(const SkRect& r, SkScalar rx, SkScalar ry, + const SkPaint& paint) { + if (rx > 0 && ry > 0) { + SkRRect rrect; + rrect.setRectXY(r, rx, ry); + this->drawRRect(rrect, paint); + } else { + this->drawRect(r, paint); + } +} + +void SkCanvas::drawArc(const SkRect& oval, SkScalar startAngle, + SkScalar sweepAngle, bool useCenter, + const SkPaint& paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (oval.isEmpty() || !sweepAngle) { + return; + } + this->onDrawArc(oval, startAngle, sweepAngle, useCenter, paint); +} + +/////////////////////////////////////////////////////////////////////////////// +#ifdef SK_DISABLE_SKPICTURE +void SkCanvas::drawPicture(const SkPicture* picture, const SkMatrix* matrix, const SkPaint* paint) {} + + +void SkCanvas::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix, + const SkPaint* paint) {} +#else + +void SkCanvas::drawPicture(const SkPicture* picture, const SkMatrix* matrix, const SkPaint* paint) { + TRACE_EVENT0("skia", TRACE_FUNC); + RETURN_ON_NULL(picture); + + if (matrix && matrix->isIdentity()) { + matrix = nullptr; + } + if (picture->approximateOpCount() <= kMaxPictureOpsToUnrollInsteadOfRef) { + SkAutoCanvasMatrixPaint acmp(this, matrix, paint, picture->cullRect()); + picture->playback(this); + } else { + this->onDrawPicture(picture, matrix, paint); + } +} + +void SkCanvas::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix, + const SkPaint* paint) { + if (this->internalQuickReject(picture->cullRect(), paint ? *paint : SkPaint{}, matrix)) { + return; + } + + SkAutoCanvasMatrixPaint acmp(this, matrix, paint, picture->cullRect()); + picture->playback(this); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +SkCanvas::ImageSetEntry::ImageSetEntry() = default; +SkCanvas::ImageSetEntry::~ImageSetEntry() = default; +SkCanvas::ImageSetEntry::ImageSetEntry(const ImageSetEntry&) = default; +SkCanvas::ImageSetEntry& SkCanvas::ImageSetEntry::operator=(const ImageSetEntry&) = default; + +SkCanvas::ImageSetEntry::ImageSetEntry(sk_sp image, const SkRect& srcRect, + const SkRect& dstRect, int matrixIndex, float alpha, + unsigned aaFlags, bool hasClip) + : fImage(std::move(image)) + , fSrcRect(srcRect) + , fDstRect(dstRect) + , fMatrixIndex(matrixIndex) + , fAlpha(alpha) + , fAAFlags(aaFlags) + , fHasClip(hasClip) {} + +SkCanvas::ImageSetEntry::ImageSetEntry(sk_sp image, const SkRect& srcRect, + const SkRect& dstRect, float alpha, unsigned aaFlags) + : fImage(std::move(image)) + , fSrcRect(srcRect) + , fDstRect(dstRect) + , fAlpha(alpha) + , fAAFlags(aaFlags) {} + +/////////////////////////////////////////////////////////////////////////////// + +std::unique_ptr SkCanvas::MakeRasterDirect(const SkImageInfo& info, void* pixels, + size_t rowBytes, const SkSurfaceProps* props) { + if (!SkSurfaceValidateRasterInfo(info, rowBytes)) { + return nullptr; + } + + SkBitmap bitmap; + if (!bitmap.installPixels(info, pixels, rowBytes)) { + return nullptr; + } + + return props ? + std::make_unique(bitmap, *props) : + std::make_unique(bitmap); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkNoDrawCanvas::SkNoDrawCanvas(int width, int height) + : INHERITED(SkIRect::MakeWH(width, height)) {} + +SkNoDrawCanvas::SkNoDrawCanvas(const SkIRect& bounds) + : INHERITED(bounds) {} + +SkNoDrawCanvas::SkNoDrawCanvas(sk_sp device) + : INHERITED(device) {} + +SkCanvas::SaveLayerStrategy SkNoDrawCanvas::getSaveLayerStrategy(const SaveLayerRec& rec) { + (void)this->INHERITED::getSaveLayerStrategy(rec); + return kNoLayer_SaveLayerStrategy; +} + +bool SkNoDrawCanvas::onDoSaveBehind(const SkRect*) { + return false; +} + +/////////////////////////////////////////////////////////////////////////////// + +static_assert((int)SkRegion::kDifference_Op == (int)SkClipOp::kDifference, ""); +static_assert((int)SkRegion::kIntersect_Op == (int)SkClipOp::kIntersect, ""); + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkRasterHandleAllocator::Handle SkCanvas::accessTopRasterHandle() const { + const SkBaseDevice* dev = this->topDevice(); + if (fAllocator) { + SkRasterHandleAllocator::Handle handle = dev->getRasterHandle(); + SkIRect clip = dev->devClipBounds(); + if (!clip.intersect({0, 0, dev->width(), dev->height()})) { + clip.setEmpty(); + } + + fAllocator->updateHandle(handle, dev->localToDevice(), clip); + return handle; + } + return nullptr; +} + +static bool install(SkBitmap* bm, const SkImageInfo& info, + const SkRasterHandleAllocator::Rec& rec) { + return bm->installPixels(info, rec.fPixels, rec.fRowBytes, rec.fReleaseProc, rec.fReleaseCtx); +} + +SkRasterHandleAllocator::Handle SkRasterHandleAllocator::allocBitmap(const SkImageInfo& info, + SkBitmap* bm) { + SkRasterHandleAllocator::Rec rec; + if (!this->allocHandle(info, &rec) || !install(bm, info, rec)) { + return nullptr; + } + return rec.fHandle; +} + +std::unique_ptr +SkRasterHandleAllocator::MakeCanvas(std::unique_ptr alloc, + const SkImageInfo& info, const Rec* rec, + const SkSurfaceProps* props) { + if (!alloc || !SkSurfaceValidateRasterInfo(info, rec ? rec->fRowBytes : kIgnoreRowBytesValue)) { + return nullptr; + } + + SkBitmap bm; + Handle hndl; + + if (rec) { + hndl = install(&bm, info, *rec) ? rec->fHandle : nullptr; + } else { + hndl = alloc->allocBitmap(info, &bm); + } + return hndl ? std::unique_ptr(new SkCanvas(bm, std::move(alloc), hndl, props)) + : nullptr; +} + +//////////////////////////////////////////////////////////////////////////////////////////////////// +#if defined(SK_GANESH) && GR_TEST_UTILS +SkTestCanvas::SkTestCanvas(SkCanvas* canvas) + : SkCanvas(sk_ref_sp(canvas->baseDevice())) {} + +void SkTestCanvas::onDrawGlyphRunList( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) { + SkRect bounds = glyphRunList.sourceBoundsWithOrigin(); + if (this->internalQuickReject(bounds, paint)) { + return; + } + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + if (glyphRunList.hasRSXForm()) { + this->SkCanvas::onDrawGlyphRunList(glyphRunList, layer->paint()); + } else { + auto slug = this->onConvertGlyphRunListToSlug(glyphRunList, layer->paint()); + this->drawSlug(slug.get()); + } + } +} + +SkTestCanvas::SkTestCanvas(SkCanvas* canvas) + : SkCanvas(sk_ref_sp(canvas->baseDevice())) {} + +void SkTestCanvas::onDrawGlyphRunList( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) { + SkRect bounds = glyphRunList.sourceBoundsWithOrigin(); + if (this->internalQuickReject(bounds, paint)) { + return; + } + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + if (glyphRunList.hasRSXForm()) { + this->SkCanvas::onDrawGlyphRunList(glyphRunList, layer->paint()); + } else { + sk_sp bytes; + { + auto slug = this->onConvertGlyphRunListToSlug(glyphRunList, layer->paint()); + if (slug != nullptr) { + bytes = slug->serialize(); + } + } + { + if (bytes != nullptr) { + auto slug = Slug::Deserialize(bytes->data(), bytes->size()); + this->drawSlug(slug.get()); + } + } + } + } +} + +// A do nothing handle manager for the remote strike server. +class ServerHandleManager : public SkStrikeServer::DiscardableHandleManager { +public: + SkDiscardableHandleId createHandle() override { + return 0; + } + + bool lockHandle(SkDiscardableHandleId id) override { + return true; + } + + bool isHandleDeleted(SkDiscardableHandleId id) override { + return false; + } +}; + +// Lock the strikes into the cache for the length of the test. This handler is tied to the lifetime +// of the canvas used to render the entire test. +class ClientHandleManager : public SkStrikeClient::DiscardableHandleManager { +public: + bool deleteHandle(SkDiscardableHandleId id) override { + return fIsLocked; + } + + void assertHandleValid(SkDiscardableHandleId id) override { + DiscardableHandleManager::assertHandleValid(id); + } + + void notifyCacheMiss(SkStrikeClient::CacheMissType type, int fontSize) override { + + } + + void notifyReadFailure(const ReadFailureData& data) override { + DiscardableHandleManager::notifyReadFailure(data); + } + + void unlock() { + fIsLocked = true; + } + +private: + bool fIsLocked{false}; +}; + +SkTestCanvas::SkTestCanvas(SkCanvas* canvas) + : SkCanvas(sk_ref_sp(canvas->baseDevice())) + , fServerHandleManager(new ServerHandleManager{}) + , fClientHandleManager(new ClientHandleManager{}) + , fStrikeServer(fServerHandleManager.get()) + , fStrikeClient(fClientHandleManager) {} + +// Allow the strikes to be freed from the strike cache after the test has been drawn. +SkTestCanvas::~SkTestCanvas() { + static_cast(fClientHandleManager.get())->unlock(); +} + +void SkTestCanvas::onDrawGlyphRunList( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) { + SkRect bounds = glyphRunList.sourceBoundsWithOrigin(); + if (this->internalQuickReject(bounds, paint)) { + return; + } + auto layer = this->aboutToDraw(this, paint, &bounds); + if (layer) { + if (glyphRunList.hasRSXForm()) { + this->SkCanvas::onDrawGlyphRunList(glyphRunList, layer->paint()); + } else { + sk_sp slugBytes; + std::vector glyphBytes; + { + auto analysisCanvas = fStrikeServer.makeAnalysisCanvas( + this->topDevice()->width(), + this->topDevice()->height(), + this->fProps, + this->topDevice()->imageInfo().refColorSpace(), + // TODO: Where should we get this value from? + /*DFTSupport=*/ true); + + // TODO: Move the analysis canvas processing up to the via to handle a whole + // document at a time. This is not the correct way to handle the CTM; it doesn't + // work for layers. + analysisCanvas->setMatrix(this->getLocalToDevice()); + auto slug = analysisCanvas->onConvertGlyphRunListToSlug(glyphRunList, + layer->paint()); + if (slug != nullptr) { + slugBytes = slug->serialize(); + } + fStrikeServer.writeStrikeData(&glyphBytes); + } + { + if (!glyphBytes.empty()) { + fStrikeClient.readStrikeData(glyphBytes.data(), glyphBytes.size()); + } + if (slugBytes != nullptr) { + auto slug = Slug::Deserialize( + slugBytes->data(), slugBytes->size(), &fStrikeClient); + this->drawSlug(slug.get()); + } + } + } + } +} +#endif + +//////////////////////////////////////////////////////////////////////////////////////////////////// diff --git a/gfx/skia/skia/src/core/SkCanvasPriv.cpp b/gfx/skia/skia/src/core/SkCanvasPriv.cpp new file mode 100644 index 0000000000..3733516dbc --- /dev/null +++ b/gfx/skia/skia/src/core/SkCanvasPriv.cpp @@ -0,0 +1,156 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkCanvasPriv.h" + +#include "src/base/SkAutoMalloc.h" +#include "src/core/SkDevice.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriter32.h" + +#include + +SkAutoCanvasMatrixPaint::SkAutoCanvasMatrixPaint(SkCanvas* canvas, const SkMatrix* matrix, + const SkPaint* paint, const SkRect& bounds) + : fCanvas(canvas) + , fSaveCount(canvas->getSaveCount()) { + if (paint) { + SkRect newBounds = bounds; + if (matrix) { + matrix->mapRect(&newBounds); + } + canvas->saveLayer(&newBounds, paint); + } else if (matrix) { + canvas->save(); + } + + if (matrix) { + canvas->concat(*matrix); + } +} + +SkAutoCanvasMatrixPaint::~SkAutoCanvasMatrixPaint() { + fCanvas->restoreToCount(fSaveCount); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkCanvasPriv::ReadLattice(SkReadBuffer& buffer, SkCanvas::Lattice* lattice) { + lattice->fXCount = buffer.readInt(); + lattice->fXDivs = buffer.skipT(lattice->fXCount); + lattice->fYCount = buffer.readInt(); + lattice->fYDivs = buffer.skipT(lattice->fYCount); + int flagCount = buffer.readInt(); + lattice->fRectTypes = nullptr; + lattice->fColors = nullptr; + if (flagCount) { + lattice->fRectTypes = buffer.skipT(flagCount); + lattice->fColors = buffer.skipT(flagCount); + } + lattice->fBounds = buffer.skipT(); + return buffer.isValid(); +} + +size_t SkCanvasPriv::WriteLattice(void* buffer, const SkCanvas::Lattice& lattice) { + int flagCount = lattice.fRectTypes ? (lattice.fXCount + 1) * (lattice.fYCount + 1) : 0; + + const size_t size = (1 + lattice.fXCount + 1 + lattice.fYCount + 1) * sizeof(int32_t) + + SkAlign4(flagCount * sizeof(SkCanvas::Lattice::RectType)) + + SkAlign4(flagCount * sizeof(SkColor)) + + sizeof(SkIRect); + + if (buffer) { + SkWriter32 writer(buffer, size); + writer.write32(lattice.fXCount); + writer.write(lattice.fXDivs, lattice.fXCount * sizeof(uint32_t)); + writer.write32(lattice.fYCount); + writer.write(lattice.fYDivs, lattice.fYCount * sizeof(uint32_t)); + writer.write32(flagCount); + writer.writePad(lattice.fRectTypes, flagCount * sizeof(uint8_t)); + writer.write(lattice.fColors, flagCount * sizeof(SkColor)); + SkASSERT(lattice.fBounds); + writer.write(lattice.fBounds, sizeof(SkIRect)); + SkASSERT(writer.bytesWritten() == size); + } + return size; +} + +void SkCanvasPriv::WriteLattice(SkWriteBuffer& buffer, const SkCanvas::Lattice& lattice) { + const size_t size = WriteLattice(nullptr, lattice); + SkAutoSMalloc<1024> storage(size); + WriteLattice(storage.get(), lattice); + buffer.writePad32(storage.get(), size); +} + +void SkCanvasPriv::GetDstClipAndMatrixCounts(const SkCanvas::ImageSetEntry set[], int count, + int* totalDstClipCount, int* totalMatrixCount) { + int dstClipCount = 0; + int maxMatrixIndex = -1; + for (int i = 0; i < count; ++i) { + dstClipCount += 4 * set[i].fHasClip; + if (set[i].fMatrixIndex > maxMatrixIndex) { + maxMatrixIndex = set[i].fMatrixIndex; + } + } + + *totalDstClipCount = dstClipCount; + *totalMatrixCount = maxMatrixIndex + 1; +} + +#if GR_TEST_UTILS && defined(SK_GANESH) + +#include "src/gpu/ganesh/Device_v1.h" + +skgpu::ganesh::SurfaceDrawContext* SkCanvasPriv::TopDeviceSurfaceDrawContext(SkCanvas* canvas) { + if (auto gpuDevice = canvas->topDevice()->asGaneshDevice()) { + return gpuDevice->surfaceDrawContext(); + } + + return nullptr; +} + +skgpu::ganesh::SurfaceFillContext* SkCanvasPriv::TopDeviceSurfaceFillContext(SkCanvas* canvas) { + if (auto gpuDevice = canvas->topDevice()->asGaneshDevice()) { + return gpuDevice->surfaceFillContext(); + } + + return nullptr; +} + +#endif // GR_TEST_UTILS && defined(SK_GANESH) + + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/Device_v1.h" + +GrRenderTargetProxy* SkCanvasPriv::TopDeviceTargetProxy(SkCanvas* canvas) { + if (auto gpuDevice = canvas->topDevice()->asGaneshDevice()) { + return gpuDevice->targetProxy(); + } + + return nullptr; +} + +#else // defined(SK_GANESH) + +GrRenderTargetProxy* SkCanvasPriv::TopDeviceTargetProxy(SkCanvas* canvas) { + return nullptr; +} + +#endif // defined(SK_GANESH) + +#if GRAPHITE_TEST_UTILS +#include "src/gpu/graphite/Device.h" + +skgpu::graphite::TextureProxy* SkCanvasPriv::TopDeviceGraphiteTargetProxy(SkCanvas* canvas) { + if (auto gpuDevice = canvas->topDevice()->asGraphiteDevice()) { + return gpuDevice->target(); + } + return nullptr; +} + +#endif // GRAPHITE_TEST_UTILS diff --git a/gfx/skia/skia/src/core/SkCanvasPriv.h b/gfx/skia/skia/src/core/SkCanvasPriv.h new file mode 100644 index 0000000000..432127d8a1 --- /dev/null +++ b/gfx/skia/skia/src/core/SkCanvasPriv.h @@ -0,0 +1,116 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCanvasPriv_DEFINED +#define SkCanvasPriv_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/private/base/SkNoncopyable.h" + +class SkReadBuffer; +class SkWriteBuffer; + +#if GR_TEST_UTILS && defined(SK_GANESH) +namespace skgpu::ganesh { +class SurfaceDrawContext; +class SurfaceFillContext; +} // namespace skgpu::ganesh +#endif + +// This declaration must match the one in SkDeferredDisplayList.h +#if defined(SK_GANESH) +class GrRenderTargetProxy; +#else +using GrRenderTargetProxy = SkRefCnt; +#endif // defined(SK_GANESH) + +#if GRAPHITE_TEST_UTILS +namespace skgpu::graphite { + class TextureProxy; +} +#endif + +class SkAutoCanvasMatrixPaint : SkNoncopyable { +public: + SkAutoCanvasMatrixPaint(SkCanvas*, const SkMatrix*, const SkPaint*, const SkRect& bounds); + ~SkAutoCanvasMatrixPaint(); + +private: + SkCanvas* fCanvas; + int fSaveCount; +}; + +class SkCanvasPriv { +public: + // The lattice has pointers directly into the readbuffer + static bool ReadLattice(SkReadBuffer&, SkCanvas::Lattice*); + + static void WriteLattice(SkWriteBuffer&, const SkCanvas::Lattice&); + + // return the byte-size of the lattice, even if the buffer is null + // storage must be 4-byte aligned + static size_t WriteLattice(void* storage, const SkCanvas::Lattice&); + + static int SaveBehind(SkCanvas* canvas, const SkRect* subset) { + return canvas->only_axis_aligned_saveBehind(subset); + } + static void DrawBehind(SkCanvas* canvas, const SkPaint& paint) { + canvas->drawClippedToSaveBehind(paint); + } + + // Exposed for testing on non-Android framework builds + static void ResetClip(SkCanvas* canvas) { + canvas->internal_private_resetClip(); + } + + static SkBaseDevice* TopDevice(SkCanvas* canvas) { + return canvas->topDevice(); + } + +#if GR_TEST_UTILS && defined(SK_GANESH) + static skgpu::ganesh::SurfaceDrawContext* TopDeviceSurfaceDrawContext(SkCanvas*); + static skgpu::ganesh::SurfaceFillContext* TopDeviceSurfaceFillContext(SkCanvas*); +#endif + static GrRenderTargetProxy* TopDeviceTargetProxy(SkCanvas*); + +#if GRAPHITE_TEST_UTILS + static skgpu::graphite::TextureProxy* TopDeviceGraphiteTargetProxy(SkCanvas*); +#endif + + // The experimental_DrawEdgeAAImageSet API accepts separate dstClips and preViewMatrices arrays, + // where entries refer into them, but no explicit size is provided. Given a set of entries, + // computes the minimum length for these arrays that would provide index access errors. + static void GetDstClipAndMatrixCounts(const SkCanvas::ImageSetEntry set[], int count, + int* totalDstClipCount, int* totalMatrixCount); + + static SkCanvas::SaveLayerRec ScaledBackdropLayer(const SkRect* bounds, + const SkPaint* paint, + const SkImageFilter* backdrop, + SkScalar backdropScale, + SkCanvas::SaveLayerFlags saveLayerFlags) { + return SkCanvas::SaveLayerRec(bounds, paint, backdrop, backdropScale, saveLayerFlags); + } + + static SkScalar GetBackdropScaleFactor(const SkCanvas::SaveLayerRec& rec) { + return rec.fExperimentalBackdropScale; + } + + static void SetBackdropScaleFactor(SkCanvas::SaveLayerRec* rec, SkScalar scale) { + rec->fExperimentalBackdropScale = scale; + } +}; + +/** + * This constant is trying to balance the speed of ref'ing a subpicture into a parent picture, + * against the playback cost of recursing into the subpicture to get at its actual ops. + * + * For now we pick a conservatively small value, though measurement (and other heuristics like + * the type of ops contained) may justify changing this value. + */ +constexpr int kMaxPictureOpsToUnrollInsteadOfRef = 1; + +#endif diff --git a/gfx/skia/skia/src/core/SkCanvas_Raster.cpp b/gfx/skia/skia/src/core/SkCanvas_Raster.cpp new file mode 100644 index 0000000000..28694ac42a --- /dev/null +++ b/gfx/skia/skia/src/core/SkCanvas_Raster.cpp @@ -0,0 +1,54 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkRasterHandleAllocator.h" +#include "include/core/SkRefCnt.h" +#include "src/core/SkBitmapDevice.h" +#include "src/core/SkDevice.h" +#include "src/core/SkSurfacePriv.h" +#include "src/text/GlyphRun.h" // IWYU pragma: keep + +#include +#include + +class SkBitmap; +class SkSurfaceProps; + +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkImageInfo.h" + +#endif + +SkCanvas::SkCanvas(const SkBitmap& bitmap, const SkSurfaceProps& props) + : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)), fProps(props) { + this->init(sk_make_sp(bitmap, fProps)); +} + +SkCanvas::SkCanvas(const SkBitmap& bitmap, + std::unique_ptr alloc, + SkRasterHandleAllocator::Handle hndl, + const SkSurfaceProps* props) + : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) + , fProps(SkSurfacePropsCopyOrDefault(props)) + , fAllocator(std::move(alloc)) { + this->init(sk_make_sp(bitmap, fProps, hndl)); +} + +SkCanvas::SkCanvas(const SkBitmap& bitmap) : SkCanvas(bitmap, nullptr, nullptr, nullptr) {} + +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) +SkCanvas::SkCanvas(const SkBitmap& bitmap, ColorBehavior) + : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) { + SkBitmap tmp(bitmap); + *const_cast(&tmp.info()) = tmp.info().makeColorSpace(nullptr); + this->init(sk_make_sp(tmp, fProps)); +} +#endif + diff --git a/gfx/skia/skia/src/core/SkCapabilities.cpp b/gfx/skia/skia/src/core/SkCapabilities.cpp new file mode 100644 index 0000000000..50e7e58715 --- /dev/null +++ b/gfx/skia/skia/src/core/SkCapabilities.cpp @@ -0,0 +1,30 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCapabilities.h" + +#ifdef SK_ENABLE_SKSL +#include "src/sksl/SkSLUtil.h" +#endif + +sk_sp SkCapabilities::RasterBackend() { + static SkCapabilities* sCaps = [](){ + SkCapabilities* caps = new SkCapabilities; +#ifdef SK_ENABLE_SKSL + caps->fSkSLVersion = SkSL::Version::k100; +#endif + return caps; + }(); + + return sk_ref_sp(sCaps); +} + +#ifdef SK_ENABLE_SKSL +void SkCapabilities::initSkCaps(const SkSL::ShaderCaps* shaderCaps) { + this->fSkSLVersion = shaderCaps->supportedSkSLVerion(); +} +#endif diff --git a/gfx/skia/skia/src/core/SkChromeRemoteGlyphCache.cpp b/gfx/skia/skia/src/core/SkChromeRemoteGlyphCache.cpp new file mode 100644 index 0000000000..4802c1e9b8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkChromeRemoteGlyphCache.cpp @@ -0,0 +1,1271 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/chromium/SkChromeRemoteGlyphCache.h" + +#include "include/core/SkDrawable.h" +#include "include/core/SkFont.h" +#include "include/core/SkSpan.h" +#include "include/core/SkTypeface.h" +#include "include/private/SkChecksum.h" +#include "include/private/base/SkDebug.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkDescriptor.h" +#include "src/core/SkDevice.h" +#include "src/core/SkDistanceFieldGen.h" +#include "src/core/SkDraw.h" +#include "src/core/SkEnumerate.h" +#include "src/core/SkFontMetricsPriv.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkTHash.h" +#include "src/core/SkTraceEvent.h" +#include "src/core/SkTypeface_remote.h" +#include "src/core/SkWriteBuffer.h" +#include "src/text/GlyphRun.h" +#include "src/text/StrikeForGPU.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GrContextOptions.h" +#include "src/gpu/ganesh/GrDrawOpAtlas.h" +#include "src/text/gpu/SDFTControl.h" +#include "src/text/gpu/SubRunAllocator.h" +#include "src/text/gpu/SubRunContainer.h" +#include "src/text/gpu/TextBlob.h" +#endif + +using namespace sktext; +using namespace sktext::gpu; +using namespace skglyph; + +// TODO: remove when new serialization code is done. +//#define SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION + +namespace { +#if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) +// -- Serializer ----------------------------------------------------------------------------------- +size_t pad(size_t size, size_t alignment) { return (size + (alignment - 1)) & ~(alignment - 1); } + +// Alignment between x86 and x64 differs for some types, in particular +// int64_t and doubles have 4 and 8-byte alignment, respectively. +// Be consistent even when writing and reading across different architectures. +template +size_t serialization_alignment() { + return sizeof(T) == 8 ? 8 : alignof(T); +} + +class Serializer { +public: + explicit Serializer(std::vector* buffer) : fBuffer{buffer} {} + + template + T* emplace(Args&&... args) { + auto result = this->allocate(sizeof(T), serialization_alignment()); + return new (result) T{std::forward(args)...}; + } + + template + void write(const T& data) { + T* result = (T*)this->allocate(sizeof(T), serialization_alignment()); + memcpy(result, &data, sizeof(T)); + } + + void writeDescriptor(const SkDescriptor& desc) { + write(desc.getLength()); + auto result = this->allocate(desc.getLength(), alignof(SkDescriptor)); + memcpy(result, &desc, desc.getLength()); + } + + void* allocate(size_t size, size_t alignment) { + size_t aligned = pad(fBuffer->size(), alignment); + fBuffer->resize(aligned + size); + return &(*fBuffer)[aligned]; + } + +private: + std::vector* fBuffer; +}; + +// -- Deserializer ------------------------------------------------------------------------------- +// Note that the Deserializer is reading untrusted data, we need to guard against invalid data. +class Deserializer { +public: + Deserializer(const volatile char* memory, size_t memorySize) + : fMemory(memory), fMemorySize(memorySize) {} + + template + bool read(T* val) { + auto* result = this->ensureAtLeast(sizeof(T), serialization_alignment()); + if (!result) return false; + + memcpy(val, const_cast(result), sizeof(T)); + return true; + } + + bool readDescriptor(SkAutoDescriptor* ad) { + uint32_t descLength = 0u; + if (!this->read(&descLength)) return false; + + auto* underlyingBuffer = this->ensureAtLeast(descLength, alignof(SkDescriptor)); + if (!underlyingBuffer) return false; + SkReadBuffer buffer((void*)underlyingBuffer, descLength); + auto autoDescriptor = SkAutoDescriptor::MakeFromBuffer(buffer); + if (!autoDescriptor.has_value()) { return false; } + + *ad = std::move(*autoDescriptor); + return true; + } + + const volatile void* read(size_t size, size_t alignment) { + return this->ensureAtLeast(size, alignment); + } + + size_t bytesRead() const { return fBytesRead; } + +private: + const volatile char* ensureAtLeast(size_t size, size_t alignment) { + size_t padded = pad(fBytesRead, alignment); + + // Not enough data. + if (padded > fMemorySize) return nullptr; + if (size > fMemorySize - padded) return nullptr; + + auto* result = fMemory + padded; + fBytesRead = padded + size; + return result; + } + + // Note that we read each piece of memory only once to guard against TOCTOU violations. + const volatile char* fMemory; + size_t fMemorySize; + size_t fBytesRead = 0u; +}; + +// Paths use a SkWriter32 which requires 4 byte alignment. +static const size_t kPathAlignment = 4u; +static const size_t kDrawableAlignment = 8u; +#endif + +// -- StrikeSpec ----------------------------------------------------------------------------------- +struct StrikeSpec { + StrikeSpec() = default; + StrikeSpec(SkTypefaceID typefaceID, SkDiscardableHandleId discardableHandleId) + : fTypefaceID{typefaceID}, fDiscardableHandleId(discardableHandleId) {} + SkTypefaceID fTypefaceID = 0u; + SkDiscardableHandleId fDiscardableHandleId = 0u; +}; + +// -- RemoteStrike ---------------------------------------------------------------------------- +class RemoteStrike final : public sktext::StrikeForGPU { +public: + // N.B. RemoteStrike is not valid until ensureScalerContext is called. + RemoteStrike(const SkStrikeSpec& strikeSpec, + std::unique_ptr context, + SkDiscardableHandleId discardableHandleId); + ~RemoteStrike() override = default; + + void lock() override {} + void unlock() override {} + SkGlyphDigest digestFor(skglyph::ActionType, SkPackedGlyphID) override; + bool prepareForImage(SkGlyph* glyph) override { + this->ensureScalerContext(); + glyph->setImage(&fAlloc, fContext.get()); + return glyph->image() != nullptr; + } + bool prepareForPath(SkGlyph* glyph) override { + this->ensureScalerContext(); + glyph->setPath(&fAlloc, fContext.get()); + return glyph->path() != nullptr; + } + bool prepareForDrawable(SkGlyph* glyph) override { + this->ensureScalerContext(); + glyph->setDrawable(&fAlloc, fContext.get()); + return glyph->drawable() != nullptr; + } + + #if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) + void writePendingGlyphs(Serializer* serializer); + #else + void writePendingGlyphs(SkWriteBuffer& buffer); + #endif + + SkDiscardableHandleId discardableHandleId() const { return fDiscardableHandleId; } + + const SkDescriptor& getDescriptor() const override { + return *fDescriptor.getDesc(); + } + + void setStrikeSpec(const SkStrikeSpec& strikeSpec); + + const SkGlyphPositionRoundingSpec& roundingSpec() const override { + return fRoundingSpec; + } + + sktext::SkStrikePromise strikePromise() override; + + bool hasPendingGlyphs() const { + return !fMasksToSend.empty() || !fPathsToSend.empty() || !fDrawablesToSend.empty(); + } + + void resetScalerContext(); + +private: + #if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) + void writeGlyphPath(const SkGlyph& glyph, Serializer* serializer) const; + void writeGlyphDrawable(const SkGlyph& glyph, Serializer* serializer) const; + #endif + + void ensureScalerContext(); + + const SkAutoDescriptor fDescriptor; + const SkDiscardableHandleId fDiscardableHandleId; + + const SkGlyphPositionRoundingSpec fRoundingSpec; + + // The context built using fDescriptor + std::unique_ptr fContext; + + // fStrikeSpec is set every time getOrCreateCache is called. This allows the code to maintain + // the fContext as lazy as possible. + const SkStrikeSpec* fStrikeSpec; + + // Have the metrics been sent for this strike. Only send them once. + bool fHaveSentFontMetrics{false}; + + // The masks and paths that currently reside in the GPU process. + SkTHashTable fSentGlyphs; + + // The Masks, SDFT Mask, and Paths that need to be sent to the GPU task for the processed + // TextBlobs. Cleared after diffs are serialized. + std::vector fMasksToSend; + std::vector fPathsToSend; + std::vector fDrawablesToSend; + + // Alloc for storing bits and pieces of paths and drawables, Cleared after diffs are serialized. + SkArenaAllocWithReset fAlloc{256}; +}; + +RemoteStrike::RemoteStrike( + const SkStrikeSpec& strikeSpec, + std::unique_ptr context, + uint32_t discardableHandleId) + : fDescriptor{strikeSpec.descriptor()} + , fDiscardableHandleId(discardableHandleId) + , fRoundingSpec{context->isSubpixel(), context->computeAxisAlignmentForHText()} + // N.B. context must come last because it is used above. + , fContext{std::move(context)} { + SkASSERT(fDescriptor.getDesc() != nullptr); + SkASSERT(fContext != nullptr); +} + +#if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) +// No need to write fScalerContextBits because any needed image is already generated. +void write_glyph(const SkGlyph& glyph, Serializer* serializer) { + serializer->write(glyph.getPackedID()); + serializer->write(glyph.advanceX()); + serializer->write(glyph.advanceY()); + serializer->write(glyph.width()); + serializer->write(glyph.height()); + serializer->write(glyph.top()); + serializer->write(glyph.left()); + serializer->write(glyph.maskFormat()); +} + +void RemoteStrike::writePendingGlyphs(Serializer* serializer) { + SkASSERT(this->hasPendingGlyphs()); + + // Write the desc. + serializer->emplace(fContext->getTypeface()->uniqueID(), fDiscardableHandleId); + serializer->writeDescriptor(*fDescriptor.getDesc()); + + serializer->emplace(fHaveSentFontMetrics); + if (!fHaveSentFontMetrics) { + // Write FontMetrics if not sent before. + SkFontMetrics fontMetrics; + fContext->getFontMetrics(&fontMetrics); + serializer->write(fontMetrics); + fHaveSentFontMetrics = true; + } + + // Write mask glyphs + serializer->emplace(fMasksToSend.size()); + for (SkGlyph& glyph : fMasksToSend) { + SkASSERT(SkMask::IsValidFormat(glyph.maskFormat())); + + write_glyph(glyph, serializer); + auto imageSize = glyph.imageSize(); + if (imageSize > 0 && SkGlyphDigest::FitsInAtlas(glyph)) { + glyph.setImage(serializer->allocate(imageSize, glyph.formatAlignment())); + fContext->getImage(glyph); + } + } + fMasksToSend.clear(); + + // Write glyphs paths. + serializer->emplace(fPathsToSend.size()); + for (SkGlyph& glyph : fPathsToSend) { + SkASSERT(SkMask::IsValidFormat(glyph.maskFormat())); + + write_glyph(glyph, serializer); + this->writeGlyphPath(glyph, serializer); + } + fPathsToSend.clear(); + + // Write glyphs drawables. + serializer->emplace(fDrawablesToSend.size()); + for (SkGlyph& glyph : fDrawablesToSend) { + SkASSERT(SkMask::IsValidFormat(glyph.maskFormat())); + + write_glyph(glyph, serializer); + writeGlyphDrawable(glyph, serializer); + } + fDrawablesToSend.clear(); + fAlloc.reset(); +} +#else +void RemoteStrike::writePendingGlyphs(SkWriteBuffer& buffer) { + SkASSERT(this->hasPendingGlyphs()); + + buffer.writeUInt(fContext->getTypeface()->uniqueID()); + buffer.writeUInt(fDiscardableHandleId); + fDescriptor.getDesc()->flatten(buffer); + + buffer.writeBool(fHaveSentFontMetrics); + if (!fHaveSentFontMetrics) { + // Write FontMetrics if not sent before. + SkFontMetrics fontMetrics; + fContext->getFontMetrics(&fontMetrics); + SkFontMetricsPriv::Flatten(buffer, fontMetrics); + fHaveSentFontMetrics = true; + } + + // Make sure to install all the mask data into the glyphs before sending. + for (SkGlyph& glyph: fMasksToSend) { + this->prepareForImage(&glyph); + } + + // Make sure to install all the path data into the glyphs before sending. + for (SkGlyph& glyph: fPathsToSend) { + this->prepareForPath(&glyph); + } + + // Make sure to install all the drawable data into the glyphs before sending. + for (SkGlyph& glyph: fDrawablesToSend) { + this->prepareForDrawable(&glyph); + } + + // Send all the pending glyph information. + SkStrike::FlattenGlyphsByType(buffer, fMasksToSend, fPathsToSend, fDrawablesToSend); + + // Reset all the sending data. + fMasksToSend.clear(); + fPathsToSend.clear(); + fDrawablesToSend.clear(); + fAlloc.reset(); +} +#endif + +void RemoteStrike::ensureScalerContext() { + if (fContext == nullptr) { + fContext = fStrikeSpec->createScalerContext(); + } +} + +void RemoteStrike::resetScalerContext() { + fContext = nullptr; + fStrikeSpec = nullptr; +} + +void RemoteStrike::setStrikeSpec(const SkStrikeSpec& strikeSpec) { + fStrikeSpec = &strikeSpec; +} + +#if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) +void RemoteStrike::writeGlyphPath(const SkGlyph& glyph, Serializer* serializer) const { + if (glyph.isEmpty()) { + serializer->write(0u); + return; + } + + const SkPath* path = glyph.path(); + + if (path == nullptr) { + serializer->write(0u); + return; + } + + size_t pathSize = path->writeToMemory(nullptr); + serializer->write(pathSize); + path->writeToMemory(serializer->allocate(pathSize, kPathAlignment)); + + serializer->write(glyph.pathIsHairline()); +} + +void RemoteStrike::writeGlyphDrawable(const SkGlyph& glyph, Serializer* serializer) const { + if (glyph.isEmpty()) { + serializer->write(0u); + return; + } + + SkDrawable* drawable = glyph.drawable(); + + if (drawable == nullptr) { + serializer->write(0u); + return; + } + + sk_sp picture(drawable->newPictureSnapshot()); + sk_sp data = picture->serialize(); + serializer->write(data->size()); + memcpy(serializer->allocate(data->size(), kDrawableAlignment), data->data(), data->size()); +} +#endif + +SkGlyphDigest RemoteStrike::digestFor(ActionType actionType, SkPackedGlyphID packedGlyphID) { + SkGlyphDigest* digestPtr = fSentGlyphs.find(packedGlyphID); + if (digestPtr != nullptr && digestPtr->actionFor(actionType) != GlyphAction::kUnset) { + return *digestPtr; + } + + SkGlyph* glyph; + this->ensureScalerContext(); + switch (actionType) { + case kPath: { + fPathsToSend.emplace_back(fContext->makeGlyph(packedGlyphID, &fAlloc)); + glyph = &fPathsToSend.back(); + break; + } + case kDrawable: { + fDrawablesToSend.emplace_back(fContext->makeGlyph(packedGlyphID, &fAlloc)); + glyph = &fDrawablesToSend.back(); + break; + } + default: { + fMasksToSend.emplace_back(fContext->makeGlyph(packedGlyphID, &fAlloc)); + glyph = &fMasksToSend.back(); + break; + } + } + + if (digestPtr == nullptr) { + digestPtr = fSentGlyphs.set(SkGlyphDigest{0, *glyph}); + } + + digestPtr->setActionFor(actionType, glyph, this); + + return *digestPtr; +} + +sktext::SkStrikePromise RemoteStrike::strikePromise() { + return sktext::SkStrikePromise{*this->fStrikeSpec}; +} +} // namespace + +// -- SkStrikeServerImpl --------------------------------------------------------------------------- +class SkStrikeServerImpl final : public sktext::StrikeForGPUCacheInterface { +public: + explicit SkStrikeServerImpl( + SkStrikeServer::DiscardableHandleManager* discardableHandleManager); + + // SkStrikeServer API methods + void writeStrikeData(std::vector* memory); + + sk_sp findOrCreateScopedStrike(const SkStrikeSpec& strikeSpec) override; + + // Methods for testing + void setMaxEntriesInDescriptorMapForTesting(size_t count); + size_t remoteStrikeMapSizeForTesting() const; + +private: + inline static constexpr size_t kMaxEntriesInDescriptorMap = 2000u; + + void checkForDeletedEntries(); + + sk_sp getOrCreateCache(const SkStrikeSpec& strikeSpec); + + struct MapOps { + size_t operator()(const SkDescriptor* key) const { + return key->getChecksum(); + } + bool operator()(const SkDescriptor* lhs, const SkDescriptor* rhs) const { + return *lhs == *rhs; + } + }; + + using DescToRemoteStrike = + std::unordered_map, MapOps, MapOps>; + DescToRemoteStrike fDescToRemoteStrike; + + SkStrikeServer::DiscardableHandleManager* const fDiscardableHandleManager; + SkTHashSet fCachedTypefaces; + size_t fMaxEntriesInDescriptorMap = kMaxEntriesInDescriptorMap; + + // State cached until the next serialization. + SkTHashSet fRemoteStrikesToSend; + std::vector fTypefacesToSend; +}; + +SkStrikeServerImpl::SkStrikeServerImpl(SkStrikeServer::DiscardableHandleManager* dhm) + : fDiscardableHandleManager(dhm) { + SkASSERT(fDiscardableHandleManager); +} + +void SkStrikeServerImpl::setMaxEntriesInDescriptorMapForTesting(size_t count) { + fMaxEntriesInDescriptorMap = count; +} +size_t SkStrikeServerImpl::remoteStrikeMapSizeForTesting() const { + return fDescToRemoteStrike.size(); +} + +#if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) +void SkStrikeServerImpl::writeStrikeData(std::vector* memory) { + #if defined(SK_TRACE_GLYPH_RUN_PROCESS) + SkString msg; + msg.appendf("\nBegin send strike differences\n"); + #endif + + size_t strikesToSend = 0; + fRemoteStrikesToSend.foreach ([&](RemoteStrike* strike) { + if (strike->hasPendingGlyphs()) { + strikesToSend++; + } else { + strike->resetScalerContext(); + } + }); + + if (strikesToSend == 0 && fTypefacesToSend.empty()) { + fRemoteStrikesToSend.reset(); + return; + } + + Serializer serializer(memory); + serializer.emplace(fTypefacesToSend.size()); + for (const auto& typefaceProto: fTypefacesToSend) { + // Temporary: use inside knowledge of SkBinaryWriteBuffer to set the size and alignment. + // This should agree with the alignment used in readStrikeData. + alignas(uint32_t) std::uint8_t bufferBytes[24]; + SkBinaryWriteBuffer buffer{bufferBytes, std::size(bufferBytes)}; + typefaceProto.flatten(buffer); + serializer.write(buffer.bytesWritten()); + void* dest = serializer.allocate(buffer.bytesWritten(), alignof(uint32_t)); + buffer.writeToMemory(dest); + } + fTypefacesToSend.clear(); + + serializer.emplace(SkTo(strikesToSend)); + fRemoteStrikesToSend.foreach ( + [&](RemoteStrike* strike) { + if (strike->hasPendingGlyphs()) { + strike->writePendingGlyphs(&serializer); + strike->resetScalerContext(); + } + #ifdef SK_DEBUG + auto it = fDescToRemoteStrike.find(&strike->getDescriptor()); + SkASSERT(it != fDescToRemoteStrike.end()); + SkASSERT(it->second.get() == strike); + #endif + #if defined(SK_TRACE_GLYPH_RUN_PROCESS) + msg.append(strike->getDescriptor().dumpRec()); + #endif + } + ); + fRemoteStrikesToSend.reset(); + #if defined(SK_TRACE_GLYPH_RUN_PROCESS) + msg.appendf("End send strike differences"); + SkDebugf("%s\n", msg.c_str()); + #endif +} +#else +void SkStrikeServerImpl::writeStrikeData(std::vector* memory) { + SkBinaryWriteBuffer buffer{nullptr, 0}; + + // Gather statistics about what needs to be sent. + size_t strikesToSend = 0; + fRemoteStrikesToSend.foreach([&](RemoteStrike* strike) { + if (strike->hasPendingGlyphs()) { + strikesToSend++; + } else { + // This strike has nothing to send, so drop its scaler context to reduce memory. + strike->resetScalerContext(); + } + }); + + // If there are no strikes or typefaces to send, then cleanup and return. + if (strikesToSend == 0 && fTypefacesToSend.empty()) { + fRemoteStrikesToSend.reset(); + return; + } + + // Send newly seen typefaces. + SkASSERT_RELEASE(SkTFitsIn(fTypefacesToSend.size())); + buffer.writeInt(fTypefacesToSend.size()); + for (const auto& typeface: fTypefacesToSend) { + SkTypefaceProxyPrototype proto{typeface}; + proto.flatten(buffer); + } + fTypefacesToSend.clear(); + + buffer.writeInt(strikesToSend); + fRemoteStrikesToSend.foreach( + [&](RemoteStrike* strike) { + if (strike->hasPendingGlyphs()) { + strike->writePendingGlyphs(buffer); + strike->resetScalerContext(); + } + } + ); + fRemoteStrikesToSend.reset(); + + // Copy data into the vector. + auto data = buffer.snapshotAsData(); + memory->assign(data->bytes(), data->bytes() + data->size()); +} +#endif // defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) + +sk_sp SkStrikeServerImpl::findOrCreateScopedStrike( + const SkStrikeSpec& strikeSpec) { + return this->getOrCreateCache(strikeSpec); +} + +void SkStrikeServerImpl::checkForDeletedEntries() { + auto it = fDescToRemoteStrike.begin(); + while (fDescToRemoteStrike.size() > fMaxEntriesInDescriptorMap && + it != fDescToRemoteStrike.end()) { + RemoteStrike* strike = it->second.get(); + if (fDiscardableHandleManager->isHandleDeleted(strike->discardableHandleId())) { + // If we are trying to send the strike, then do not erase it. + if (!fRemoteStrikesToSend.contains(strike)) { + // Erase returns the iterator following the removed element. + it = fDescToRemoteStrike.erase(it); + continue; + } + } + ++it; + } +} + +sk_sp SkStrikeServerImpl::getOrCreateCache(const SkStrikeSpec& strikeSpec) { + // In cases where tracing is turned off, make sure not to get an unused function warning. + // Lambdaize the function. + TRACE_EVENT1("skia", "RecForDesc", "rec", + TRACE_STR_COPY( + [&strikeSpec](){ + auto ptr = + strikeSpec.descriptor().findEntry(kRec_SkDescriptorTag, nullptr); + SkScalerContextRec rec; + std::memcpy((void*)&rec, ptr, sizeof(rec)); + return rec.dump(); + }().c_str() + ) + ); + + if (auto it = fDescToRemoteStrike.find(&strikeSpec.descriptor()); + it != fDescToRemoteStrike.end()) + { + // We have processed the RemoteStrike before. Reuse it. + sk_sp strike = it->second; + strike->setStrikeSpec(strikeSpec); + if (fRemoteStrikesToSend.contains(strike.get())) { + // Already tracking + return strike; + } + + // Strike is in unknown state on GPU. Start tracking strike on GPU by locking it. + bool locked = fDiscardableHandleManager->lockHandle(it->second->discardableHandleId()); + if (locked) { + fRemoteStrikesToSend.add(strike.get()); + return strike; + } + + // If it wasn't locked, then forget this strike, and build it anew below. + fDescToRemoteStrike.erase(it); + } + + const SkTypeface& typeface = strikeSpec.typeface(); + // Create a new RemoteStrike. Start by processing the typeface. + const SkTypefaceID typefaceId = typeface.uniqueID(); + if (!fCachedTypefaces.contains(typefaceId)) { + fCachedTypefaces.add(typefaceId); + fTypefacesToSend.emplace_back(typeface); + } + + auto context = strikeSpec.createScalerContext(); + auto newHandle = fDiscardableHandleManager->createHandle(); // Locked on creation + auto remoteStrike = sk_make_sp(strikeSpec, std::move(context), newHandle); + remoteStrike->setStrikeSpec(strikeSpec); + fRemoteStrikesToSend.add(remoteStrike.get()); + auto d = &remoteStrike->getDescriptor(); + fDescToRemoteStrike[d] = remoteStrike; + + checkForDeletedEntries(); + + return remoteStrike; +} + +// -- GlyphTrackingDevice -------------------------------------------------------------------------- +#if defined(SK_GANESH) +class GlyphTrackingDevice final : public SkNoPixelsDevice { +public: + GlyphTrackingDevice( + const SkISize& dimensions, const SkSurfaceProps& props, SkStrikeServerImpl* server, + sk_sp colorSpace, sktext::gpu::SDFTControl SDFTControl) + : SkNoPixelsDevice(SkIRect::MakeSize(dimensions), props, std::move(colorSpace)) + , fStrikeServerImpl(server) + , fSDFTControl(SDFTControl) { + SkASSERT(fStrikeServerImpl != nullptr); + } + + SkBaseDevice* onCreateDevice(const CreateInfo& cinfo, const SkPaint*) override { + const SkSurfaceProps surfaceProps(this->surfaceProps().flags(), cinfo.fPixelGeometry); + return new GlyphTrackingDevice(cinfo.fInfo.dimensions(), surfaceProps, fStrikeServerImpl, + cinfo.fInfo.refColorSpace(), fSDFTControl); + } + + SkStrikeDeviceInfo strikeDeviceInfo() const override { + return {this->surfaceProps(), this->scalerContextFlags(), &fSDFTControl}; + } + +protected: + void onDrawGlyphRunList(SkCanvas*, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) override { + SkMatrix drawMatrix = this->localToDevice(); + drawMatrix.preTranslate(glyphRunList.origin().x(), glyphRunList.origin().y()); + + // Just ignore the resulting SubRunContainer. Since we're passing in a null SubRunAllocator + // no SubRuns will be produced. + STSubRunAllocator tempAlloc; + auto container = SubRunContainer::MakeInAlloc(glyphRunList, + drawMatrix, + drawingPaint, + this->strikeDeviceInfo(), + fStrikeServerImpl, + &tempAlloc, + SubRunContainer::kStrikeCalculationsOnly, + "Cache Diff"); + // Calculations only. No SubRuns. + SkASSERT(container->isEmpty()); + } + + sk_sp convertGlyphRunListToSlug(const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) override { + // Full matrix for placing glyphs. + SkMatrix positionMatrix = this->localToDevice(); + positionMatrix.preTranslate(glyphRunList.origin().x(), glyphRunList.origin().y()); + + // Use the SkStrikeServer's strike cache to generate the Slug. + return skgpu::ganesh::MakeSlug(this->localToDevice(), + glyphRunList, + initialPaint, + drawingPaint, + this->strikeDeviceInfo(), + fStrikeServerImpl); + } + +private: + SkStrikeServerImpl* const fStrikeServerImpl; + const sktext::gpu::SDFTControl fSDFTControl; +}; +#endif // defined(SK_GANESH) + +// -- SkStrikeServer ------------------------------------------------------------------------------- +SkStrikeServer::SkStrikeServer(DiscardableHandleManager* dhm) + : fImpl(new SkStrikeServerImpl{dhm}) { } + +SkStrikeServer::~SkStrikeServer() = default; + +std::unique_ptr SkStrikeServer::makeAnalysisCanvas(int width, int height, + const SkSurfaceProps& props, + sk_sp colorSpace, + bool DFTSupport, + bool DFTPerspSupport) { +#if defined(SK_GANESH) + GrContextOptions ctxOptions; +#if !defined(SK_DISABLE_SDF_TEXT) + auto control = sktext::gpu::SDFTControl{DFTSupport, + props.isUseDeviceIndependentFonts(), + DFTPerspSupport, + ctxOptions.fMinDistanceFieldFontSize, + ctxOptions.fGlyphsAsPathsFontSize}; +#else + auto control = sktext::gpu::SDFTControl{}; +#endif + + sk_sp trackingDevice(new GlyphTrackingDevice( + SkISize::Make(width, height), + props, this->impl(), + std::move(colorSpace), + control)); +#else + sk_sp trackingDevice(new SkNoPixelsDevice( + SkIRect::MakeWH(width, height), props, std::move(colorSpace))); +#endif + return std::make_unique(std::move(trackingDevice)); +} + +void SkStrikeServer::writeStrikeData(std::vector* memory) { + fImpl->writeStrikeData(memory); +} + +SkStrikeServerImpl* SkStrikeServer::impl() { return fImpl.get(); } + +void SkStrikeServer::setMaxEntriesInDescriptorMapForTesting(size_t count) { + fImpl->setMaxEntriesInDescriptorMapForTesting(count); +} +size_t SkStrikeServer::remoteStrikeMapSizeForTesting() const { + return fImpl->remoteStrikeMapSizeForTesting(); +} + +// -- DiscardableStrikePinner ---------------------------------------------------------------------- +class DiscardableStrikePinner : public SkStrikePinner { +public: + DiscardableStrikePinner(SkDiscardableHandleId discardableHandleId, + sk_sp manager) + : fDiscardableHandleId(discardableHandleId), fManager(std::move(manager)) {} + + ~DiscardableStrikePinner() override = default; + bool canDelete() override { return fManager->deleteHandle(fDiscardableHandleId); } + void assertValid() override { fManager->assertHandleValid(fDiscardableHandleId); } + +private: + const SkDiscardableHandleId fDiscardableHandleId; + sk_sp fManager; +}; + +// -- SkStrikeClientImpl --------------------------------------------------------------------------- +class SkStrikeClientImpl { +public: + explicit SkStrikeClientImpl(sk_sp, + bool isLogging = true, + SkStrikeCache* strikeCache = nullptr); + + bool readStrikeData(const volatile void* memory, size_t memorySize); + bool translateTypefaceID(SkAutoDescriptor* descriptor) const; + sk_sp retrieveTypefaceUsingServerID(SkTypefaceID) const; + +private: + class PictureBackedGlyphDrawable final : public SkDrawable { + public: + PictureBackedGlyphDrawable(sk_sp self) : fSelf(std::move(self)) {} + private: + sk_sp fSelf; + SkRect onGetBounds() override { return fSelf->cullRect(); } + size_t onApproximateBytesUsed() override { + return sizeof(PictureBackedGlyphDrawable) + fSelf->approximateBytesUsed(); + } + void onDraw(SkCanvas* canvas) override { canvas->drawPicture(fSelf); } + }; + + #if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) + static bool ReadGlyph(SkTLazy& glyph, Deserializer* deserializer); + #endif + + sk_sp addTypeface(const SkTypefaceProxyPrototype& typefaceProto); + + SkTHashMap> fServerTypefaceIdToTypeface; + sk_sp fDiscardableHandleManager; + SkStrikeCache* const fStrikeCache; + const bool fIsLogging; +}; + +SkStrikeClientImpl::SkStrikeClientImpl( + sk_sp + discardableManager, + bool isLogging, + SkStrikeCache* strikeCache) + : fDiscardableHandleManager(std::move(discardableManager)), + fStrikeCache{strikeCache ? strikeCache : SkStrikeCache::GlobalStrikeCache()}, + fIsLogging{isLogging} {} + +#if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) +// No need to write fScalerContextBits because any needed image is already generated. +bool SkStrikeClientImpl::ReadGlyph(SkTLazy& glyph, Deserializer* deserializer) { + SkPackedGlyphID glyphID; + if (!deserializer->read(&glyphID)) return false; + glyph.init(glyphID); + if (!deserializer->read(&glyph->fAdvanceX)) return false; + if (!deserializer->read(&glyph->fAdvanceY)) return false; + if (!deserializer->read(&glyph->fWidth)) return false; + if (!deserializer->read(&glyph->fHeight)) return false; + if (!deserializer->read(&glyph->fTop)) return false; + if (!deserializer->read(&glyph->fLeft)) return false; + uint8_t maskFormat; + if (!deserializer->read(&maskFormat)) return false; + if (!SkMask::IsValidFormat(maskFormat)) return false; + glyph->fMaskFormat = static_cast(maskFormat); + SkDEBUGCODE(glyph->fAdvancesBoundsFormatAndInitialPathDone = true;) + + return true; +} +#endif + +// Change the path count to track the line number of the failing read. +// TODO: change __LINE__ back to glyphPathsCount when bug chromium:1287356 is closed. +#define READ_FAILURE \ + { \ + SkDebugf("Bad font data serialization line: %d", __LINE__); \ + SkStrikeClient::DiscardableHandleManager::ReadFailureData data = { \ + memorySize, deserializer.bytesRead(), typefaceSize, \ + strikeCount, glyphImagesCount, __LINE__}; \ + fDiscardableHandleManager->notifyReadFailure(data); \ + return false; \ + } + +#if defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) +bool SkStrikeClientImpl::readStrikeData(const volatile void* memory, size_t memorySize) { + SkASSERT(memorySize != 0u); + Deserializer deserializer(static_cast(memory), memorySize); + + uint64_t typefaceSize = 0; + uint64_t strikeCount = 0; + uint64_t glyphImagesCount = 0; + uint64_t glyphPathsCount = 0; + uint64_t glyphDrawablesCount = 0; + + if (!deserializer.read(&typefaceSize)) READ_FAILURE + for (size_t i = 0; i < typefaceSize; ++i) { + uint32_t typefaceSizeBytes; + // Read the size of the buffer generated at flatten time. + if (!deserializer.read(&typefaceSizeBytes)) READ_FAILURE + // Temporary: use inside knowledge of SkReadBuffer to set the alignment. + // This should agree with the alignment used in writeStrikeData. + auto* bytes = deserializer.read(typefaceSizeBytes, alignof(uint32_t)); + if (bytes == nullptr) READ_FAILURE + SkReadBuffer buffer(const_cast(bytes), typefaceSizeBytes); + auto typefaceProto = SkTypefaceProxyPrototype::MakeFromBuffer(buffer); + if (!typefaceProto) READ_FAILURE + + this->addTypeface(typefaceProto.value()); + } + + #if defined(SK_TRACE_GLYPH_RUN_PROCESS) + SkString msg; + msg.appendf("\nBegin receive strike differences\n"); + #endif + + if (!deserializer.read(&strikeCount)) READ_FAILURE + + for (size_t i = 0; i < strikeCount; ++i) { + StrikeSpec spec; + if (!deserializer.read(&spec)) READ_FAILURE + + SkAutoDescriptor ad; + if (!deserializer.readDescriptor(&ad)) READ_FAILURE + #if defined(SK_TRACE_GLYPH_RUN_PROCESS) + msg.appendf(" Received descriptor:\n%s", ad.getDesc()->dumpRec().c_str()); + #endif + + bool fontMetricsInitialized; + if (!deserializer.read(&fontMetricsInitialized)) READ_FAILURE + + SkFontMetrics fontMetrics{}; + if (!fontMetricsInitialized) { + if (!deserializer.read(&fontMetrics)) READ_FAILURE + } + + // Preflight the TypefaceID before doing the Descriptor translation. + auto* tfPtr = fServerTypefaceIdToTypeface.find(spec.fTypefaceID); + // Received a TypefaceID for a typeface we don't know about. + if (!tfPtr) READ_FAILURE + + // Replace the ContextRec in the desc from the server to create the client + // side descriptor. + if (!this->translateTypefaceID(&ad)) READ_FAILURE + SkDescriptor* clientDesc = ad.getDesc(); + + #if defined(SK_TRACE_GLYPH_RUN_PROCESS) + msg.appendf(" Mapped descriptor:\n%s", clientDesc->dumpRec().c_str()); + #endif + auto strike = fStrikeCache->findStrike(*clientDesc); + + // Make sure strike is pinned + if (strike) { + strike->verifyPinnedStrike(); + } + + // Metrics are only sent the first time. If the metrics are not initialized, there must + // be an existing strike. + if (fontMetricsInitialized && strike == nullptr) READ_FAILURE + if (strike == nullptr) { + // Note that we don't need to deserialize the effects since we won't be generating any + // glyphs here anyway, and the desc is still correct since it includes the serialized + // effects. + SkStrikeSpec strikeSpec{*clientDesc, *tfPtr}; + strike = fStrikeCache->createStrike( + strikeSpec, &fontMetrics, + std::make_unique( + spec.fDiscardableHandleId, fDiscardableHandleManager)); + } + + if (!deserializer.read(&glyphImagesCount)) READ_FAILURE + for (size_t j = 0; j < glyphImagesCount; j++) { + SkTLazy glyph; + if (!ReadGlyph(glyph, &deserializer)) READ_FAILURE + + if (!glyph->isEmpty() && SkGlyphDigest::FitsInAtlas(*glyph)) { + const volatile void* image = + deserializer.read(glyph->imageSize(), glyph->formatAlignment()); + if (!image) READ_FAILURE + glyph->fImage = (void*)image; + } + + strike->mergeGlyphAndImage(glyph->getPackedID(), *glyph); + } + + if (!deserializer.read(&glyphPathsCount)) READ_FAILURE + for (size_t j = 0; j < glyphPathsCount; j++) { + SkTLazy glyph; + if (!ReadGlyph(glyph, &deserializer)) READ_FAILURE + + SkGlyph* allocatedGlyph = strike->mergeGlyphAndImage(glyph->getPackedID(), *glyph); + + SkPath* pathPtr = nullptr; + SkPath path; + uint64_t pathSize = 0u; + bool hairline = false; + if (!deserializer.read(&pathSize)) READ_FAILURE + + if (pathSize > 0) { + auto* pathData = deserializer.read(pathSize, kPathAlignment); + if (!pathData) READ_FAILURE + if (!path.readFromMemory(const_cast(pathData), pathSize)) READ_FAILURE + pathPtr = &path; + if (!deserializer.read(&hairline)) READ_FAILURE + } + + strike->mergePath(allocatedGlyph, pathPtr, hairline); + } + + if (!deserializer.read(&glyphDrawablesCount)) READ_FAILURE + for (size_t j = 0; j < glyphDrawablesCount; j++) { + SkTLazy glyph; + if (!ReadGlyph(glyph, &deserializer)) READ_FAILURE + + SkGlyph* allocatedGlyph = strike->mergeGlyphAndImage(glyph->getPackedID(), *glyph); + + sk_sp drawable; + uint64_t drawableSize = 0u; + if (!deserializer.read(&drawableSize)) READ_FAILURE + + if (drawableSize > 0) { + auto* drawableData = deserializer.read(drawableSize, kDrawableAlignment); + if (!drawableData) READ_FAILURE + sk_sp picture(SkPicture::MakeFromData( + const_cast(drawableData), drawableSize)); + if (!picture) READ_FAILURE + + drawable = sk_make_sp(std::move(picture)); + } + + strike->mergeDrawable(allocatedGlyph, std::move(drawable)); + } + } + +#if defined(SK_TRACE_GLYPH_RUN_PROCESS) + msg.appendf("End receive strike differences"); + SkDebugf("%s\n", msg.c_str()); +#endif + + return true; +} +#else +bool SkStrikeClientImpl::readStrikeData(const volatile void* memory, size_t memorySize) { + SkASSERT(memorySize != 0); + SkASSERT(memory != nullptr); + + SkReadBuffer buffer{const_cast(memory), memorySize}; + + int curTypeface = 0, + curStrike = 0; + + auto postError = [&](int line) { + SkDebugf("Read Error Posted %s : %d", __FILE__, line); + SkStrikeClient::DiscardableHandleManager::ReadFailureData data{ + memorySize, + buffer.offset(), + SkTo(curTypeface), + SkTo(curStrike), + SkTo(0), + SkTo(0)}; + fDiscardableHandleManager->notifyReadFailure(data); + }; + + // Read the number of typefaces sent. + const int typefaceCount = buffer.readInt(); + for (curTypeface = 0; curTypeface < typefaceCount; ++curTypeface) { + auto proto = SkTypefaceProxyPrototype::MakeFromBuffer(buffer); + if (proto) { + this->addTypeface(proto.value()); + } else { + postError(__LINE__); + return false; + } + } + + // Read the number of strikes sent. + const int stirkeCount = buffer.readInt(); + for (curStrike = 0; curStrike < stirkeCount; ++curStrike) { + + const SkTypefaceID serverTypefaceID = buffer.readUInt(); + if (serverTypefaceID == 0 && !buffer.isValid()) { + postError(__LINE__); + return false; + } + + const SkDiscardableHandleId discardableHandleID = buffer.readUInt(); + if (discardableHandleID == 0 && !buffer.isValid()) { + postError(__LINE__); + return false; + } + + std::optional serverDescriptor = SkAutoDescriptor::MakeFromBuffer(buffer); + if (!buffer.validate(serverDescriptor.has_value())) { + postError(__LINE__); + return false; + } + + const bool fontMetricsInitialized = buffer.readBool(); + if (!fontMetricsInitialized && !buffer.isValid()) { + postError(__LINE__); + return false; + } + + std::optional fontMetrics; + if (!fontMetricsInitialized) { + fontMetrics = SkFontMetricsPriv::MakeFromBuffer(buffer); + if (!fontMetrics || !buffer.isValid()) { + postError(__LINE__); + return false; + } + } + + auto* clientTypeface = fServerTypefaceIdToTypeface.find(serverTypefaceID); + if (clientTypeface == nullptr) { + postError(__LINE__); + return false; + } + + if (!this->translateTypefaceID(&serverDescriptor.value())) { + postError(__LINE__); + return false; + } + + SkDescriptor* clientDescriptor = serverDescriptor->getDesc(); + auto strike = fStrikeCache->findStrike(*clientDescriptor); + + if (strike == nullptr) { + // Metrics are only sent the first time. If creating a new strike, then the metrics + // are not initialized. + if (fontMetricsInitialized) { + postError(__LINE__); + return false; + } + SkStrikeSpec strikeSpec{*clientDescriptor, *clientTypeface}; + strike = fStrikeCache->createStrike( + strikeSpec, &fontMetrics.value(), + std::make_unique( + discardableHandleID, fDiscardableHandleManager)); + } + + // Make sure this strike is pinned on the GPU side. + strike->verifyPinnedStrike(); + + if (!strike->mergeFromBuffer(buffer)) { + postError(__LINE__); + return false; + } + } + + return true; +} +#endif // defined(SK_SUPPORT_LEGACY_STRIKE_SERIALIZATION) + +bool SkStrikeClientImpl::translateTypefaceID(SkAutoDescriptor* toChange) const { + SkDescriptor& descriptor = *toChange->getDesc(); + + // Rewrite the typefaceID in the rec. + { + uint32_t size; + // findEntry returns a const void*, remove the const in order to update in place. + void* ptr = const_cast(descriptor.findEntry(kRec_SkDescriptorTag, &size)); + SkScalerContextRec rec; + std::memcpy((void*)&rec, ptr, size); + // Get the local typeface from remote typefaceID. + auto* tfPtr = fServerTypefaceIdToTypeface.find(rec.fTypefaceID); + // Received a strike for a typeface which doesn't exist. + if (!tfPtr) { return false; } + // Update the typeface id to work with the client side. + rec.fTypefaceID = tfPtr->get()->uniqueID(); + std::memcpy(ptr, &rec, size); + } + + descriptor.computeChecksum(); + + return true; +} + +sk_sp SkStrikeClientImpl::retrieveTypefaceUsingServerID(SkTypefaceID typefaceID) const { + auto* tfPtr = fServerTypefaceIdToTypeface.find(typefaceID); + return tfPtr != nullptr ? *tfPtr : nullptr; +} + +sk_sp SkStrikeClientImpl::addTypeface(const SkTypefaceProxyPrototype& typefaceProto) { + sk_sp* typeface = + fServerTypefaceIdToTypeface.find(typefaceProto.serverTypefaceID()); + + // We already have the typeface. + if (typeface != nullptr) { + return *typeface; + } + + auto newTypeface = sk_make_sp( + typefaceProto, fDiscardableHandleManager, fIsLogging); + fServerTypefaceIdToTypeface.set(typefaceProto.serverTypefaceID(), newTypeface); + return std::move(newTypeface); +} + +// SkStrikeClient ---------------------------------------------------------------------------------- +SkStrikeClient::SkStrikeClient(sk_sp discardableManager, + bool isLogging, + SkStrikeCache* strikeCache) + : fImpl{new SkStrikeClientImpl{std::move(discardableManager), isLogging, strikeCache}} {} + +SkStrikeClient::~SkStrikeClient() = default; + +bool SkStrikeClient::readStrikeData(const volatile void* memory, size_t memorySize) { + return fImpl->readStrikeData(memory, memorySize); +} + +sk_sp SkStrikeClient::retrieveTypefaceUsingServerIDForTest( + SkTypefaceID typefaceID) const { + return fImpl->retrieveTypefaceUsingServerID(typefaceID); +} + +bool SkStrikeClient::translateTypefaceID(SkAutoDescriptor* descriptor) const { + return fImpl->translateTypefaceID(descriptor); +} + +#if defined(SK_GANESH) +sk_sp SkStrikeClient::deserializeSlugForTest(const void* data, size_t size) const { + return sktext::gpu::Slug::Deserialize(data, size, this); +} +#endif // defined(SK_GANESH) diff --git a/gfx/skia/skia/src/core/SkClipStack.cpp b/gfx/skia/skia/src/core/SkClipStack.cpp new file mode 100644 index 0000000000..2e26754e52 --- /dev/null +++ b/gfx/skia/skia/src/core/SkClipStack.cpp @@ -0,0 +1,999 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkPath.h" +#include "src/core/SkClipStack.h" +#include "src/core/SkRectPriv.h" +#include "src/shaders/SkShaderBase.h" + +#include +#include + +SkClipStack::Element::Element(const Element& that) { + switch (that.getDeviceSpaceType()) { + case DeviceSpaceType::kEmpty: + fDeviceSpaceRRect.setEmpty(); + fDeviceSpacePath.reset(); + fShader.reset(); + break; + case DeviceSpaceType::kRect: // Rect uses rrect + case DeviceSpaceType::kRRect: + fDeviceSpacePath.reset(); + fShader.reset(); + fDeviceSpaceRRect = that.fDeviceSpaceRRect; + break; + case DeviceSpaceType::kPath: + fShader.reset(); + fDeviceSpacePath.set(that.getDeviceSpacePath()); + break; + case DeviceSpaceType::kShader: + fDeviceSpacePath.reset(); + fShader = that.fShader; + break; + } + + fSaveCount = that.fSaveCount; + fOp = that.fOp; + fDeviceSpaceType = that.fDeviceSpaceType; + fDoAA = that.fDoAA; + fIsReplace = that.fIsReplace; + fFiniteBoundType = that.fFiniteBoundType; + fFiniteBound = that.fFiniteBound; + fIsIntersectionOfRects = that.fIsIntersectionOfRects; + fGenID = that.fGenID; +} + +SkClipStack::Element::~Element() = default; + +bool SkClipStack::Element::operator== (const Element& element) const { + if (this == &element) { + return true; + } + if (fOp != element.fOp || fDeviceSpaceType != element.fDeviceSpaceType || + fDoAA != element.fDoAA || fIsReplace != element.fIsReplace || + fSaveCount != element.fSaveCount) { + return false; + } + switch (fDeviceSpaceType) { + case DeviceSpaceType::kShader: + return this->getShader() == element.getShader(); + case DeviceSpaceType::kPath: + return this->getDeviceSpacePath() == element.getDeviceSpacePath(); + case DeviceSpaceType::kRRect: + return fDeviceSpaceRRect == element.fDeviceSpaceRRect; + case DeviceSpaceType::kRect: + return this->getDeviceSpaceRect() == element.getDeviceSpaceRect(); + case DeviceSpaceType::kEmpty: + return true; + default: + SkDEBUGFAIL("Unexpected type."); + return false; + } +} + +const SkRect& SkClipStack::Element::getBounds() const { + static const SkRect kEmpty = {0, 0, 0, 0}; + static const SkRect kInfinite = SkRectPriv::MakeLargeS32(); + switch (fDeviceSpaceType) { + case DeviceSpaceType::kRect: // fallthrough + case DeviceSpaceType::kRRect: + return fDeviceSpaceRRect.getBounds(); + case DeviceSpaceType::kPath: + return fDeviceSpacePath->getBounds(); + case DeviceSpaceType::kShader: + // Shaders have infinite bounds since any pixel could have clipped or full coverage + // (which is different from wide-open, where every pixel has 1.0 coverage, or empty + // where every pixel has 0.0 coverage). + return kInfinite; + case DeviceSpaceType::kEmpty: + return kEmpty; + default: + SkDEBUGFAIL("Unexpected type."); + return kEmpty; + } +} + +bool SkClipStack::Element::contains(const SkRect& rect) const { + switch (fDeviceSpaceType) { + case DeviceSpaceType::kRect: + return this->getDeviceSpaceRect().contains(rect); + case DeviceSpaceType::kRRect: + return fDeviceSpaceRRect.contains(rect); + case DeviceSpaceType::kPath: + return fDeviceSpacePath->conservativelyContainsRect(rect); + case DeviceSpaceType::kEmpty: + case DeviceSpaceType::kShader: + return false; + default: + SkDEBUGFAIL("Unexpected type."); + return false; + } +} + +bool SkClipStack::Element::contains(const SkRRect& rrect) const { + switch (fDeviceSpaceType) { + case DeviceSpaceType::kRect: + return this->getDeviceSpaceRect().contains(rrect.getBounds()); + case DeviceSpaceType::kRRect: + // We don't currently have a generalized rrect-rrect containment. + return fDeviceSpaceRRect.contains(rrect.getBounds()) || rrect == fDeviceSpaceRRect; + case DeviceSpaceType::kPath: + return fDeviceSpacePath->conservativelyContainsRect(rrect.getBounds()); + case DeviceSpaceType::kEmpty: + case DeviceSpaceType::kShader: + return false; + default: + SkDEBUGFAIL("Unexpected type."); + return false; + } +} + +void SkClipStack::Element::invertShapeFillType() { + switch (fDeviceSpaceType) { + case DeviceSpaceType::kRect: + fDeviceSpacePath.init(); + fDeviceSpacePath->addRect(this->getDeviceSpaceRect()); + fDeviceSpacePath->setFillType(SkPathFillType::kInverseEvenOdd); + fDeviceSpaceType = DeviceSpaceType::kPath; + break; + case DeviceSpaceType::kRRect: + fDeviceSpacePath.init(); + fDeviceSpacePath->addRRect(fDeviceSpaceRRect); + fDeviceSpacePath->setFillType(SkPathFillType::kInverseEvenOdd); + fDeviceSpaceType = DeviceSpaceType::kPath; + break; + case DeviceSpaceType::kPath: + fDeviceSpacePath->toggleInverseFillType(); + break; + case DeviceSpaceType::kShader: + fShader = as_SB(fShader)->makeInvertAlpha(); + break; + case DeviceSpaceType::kEmpty: + // Should this set to an empty, inverse filled path? + break; + } +} + +void SkClipStack::Element::initCommon(int saveCount, SkClipOp op, bool doAA) { + fSaveCount = saveCount; + fOp = op; + fDoAA = doAA; + fIsReplace = false; + // A default of inside-out and empty bounds means the bounds are effectively void as it + // indicates that nothing is known to be outside the clip. + fFiniteBoundType = kInsideOut_BoundsType; + fFiniteBound.setEmpty(); + fIsIntersectionOfRects = false; + fGenID = kInvalidGenID; +} + +void SkClipStack::Element::initRect(int saveCount, const SkRect& rect, const SkMatrix& m, + SkClipOp op, bool doAA) { + if (m.rectStaysRect()) { + SkRect devRect; + m.mapRect(&devRect, rect); + fDeviceSpaceRRect.setRect(devRect); + fDeviceSpaceType = DeviceSpaceType::kRect; + this->initCommon(saveCount, op, doAA); + return; + } + SkPath path; + path.addRect(rect); + path.setIsVolatile(true); + this->initAsPath(saveCount, path, m, op, doAA); +} + +void SkClipStack::Element::initRRect(int saveCount, const SkRRect& rrect, const SkMatrix& m, + SkClipOp op, bool doAA) { + if (rrect.transform(m, &fDeviceSpaceRRect)) { + SkRRect::Type type = fDeviceSpaceRRect.getType(); + if (SkRRect::kRect_Type == type || SkRRect::kEmpty_Type == type) { + fDeviceSpaceType = DeviceSpaceType::kRect; + } else { + fDeviceSpaceType = DeviceSpaceType::kRRect; + } + this->initCommon(saveCount, op, doAA); + return; + } + SkPath path; + path.addRRect(rrect); + path.setIsVolatile(true); + this->initAsPath(saveCount, path, m, op, doAA); +} + +void SkClipStack::Element::initPath(int saveCount, const SkPath& path, const SkMatrix& m, + SkClipOp op, bool doAA) { + if (!path.isInverseFillType()) { + SkRect r; + if (path.isRect(&r)) { + this->initRect(saveCount, r, m, op, doAA); + return; + } + SkRect ovalRect; + if (path.isOval(&ovalRect)) { + SkRRect rrect; + rrect.setOval(ovalRect); + this->initRRect(saveCount, rrect, m, op, doAA); + return; + } + } + this->initAsPath(saveCount, path, m, op, doAA); +} + +void SkClipStack::Element::initAsPath(int saveCount, const SkPath& path, const SkMatrix& m, + SkClipOp op, bool doAA) { + path.transform(m, fDeviceSpacePath.init()); + fDeviceSpacePath->setIsVolatile(true); + fDeviceSpaceType = DeviceSpaceType::kPath; + this->initCommon(saveCount, op, doAA); +} + +void SkClipStack::Element::initShader(int saveCount, sk_sp shader) { + SkASSERT(shader); + fDeviceSpaceType = DeviceSpaceType::kShader; + fShader = std::move(shader); + this->initCommon(saveCount, SkClipOp::kIntersect, false); +} + +void SkClipStack::Element::initReplaceRect(int saveCount, const SkRect& rect, bool doAA) { + fDeviceSpaceRRect.setRect(rect); + fDeviceSpaceType = DeviceSpaceType::kRect; + this->initCommon(saveCount, SkClipOp::kIntersect, doAA); + fIsReplace = true; +} + +void SkClipStack::Element::asDeviceSpacePath(SkPath* path) const { + switch (fDeviceSpaceType) { + case DeviceSpaceType::kEmpty: + path->reset(); + break; + case DeviceSpaceType::kRect: + path->reset(); + path->addRect(this->getDeviceSpaceRect()); + break; + case DeviceSpaceType::kRRect: + path->reset(); + path->addRRect(fDeviceSpaceRRect); + break; + case DeviceSpaceType::kPath: + *path = *fDeviceSpacePath; + break; + case DeviceSpaceType::kShader: + path->reset(); + path->addRect(SkRectPriv::MakeLargeS32()); + break; + } + path->setIsVolatile(true); +} + +void SkClipStack::Element::setEmpty() { + fDeviceSpaceType = DeviceSpaceType::kEmpty; + fFiniteBound.setEmpty(); + fFiniteBoundType = kNormal_BoundsType; + fIsIntersectionOfRects = false; + fDeviceSpaceRRect.setEmpty(); + fDeviceSpacePath.reset(); + fShader.reset(); + fGenID = kEmptyGenID; + SkDEBUGCODE(this->checkEmpty();) +} + +void SkClipStack::Element::checkEmpty() const { + SkASSERT(fFiniteBound.isEmpty()); + SkASSERT(kNormal_BoundsType == fFiniteBoundType); + SkASSERT(!fIsIntersectionOfRects); + SkASSERT(kEmptyGenID == fGenID); + SkASSERT(fDeviceSpaceRRect.isEmpty()); + SkASSERT(!fDeviceSpacePath.isValid()); + SkASSERT(!fShader); +} + +bool SkClipStack::Element::canBeIntersectedInPlace(int saveCount, SkClipOp op) const { + if (DeviceSpaceType::kEmpty == fDeviceSpaceType && + (SkClipOp::kDifference == op || SkClipOp::kIntersect == op)) { + return true; + } + // Only clips within the same save/restore frame (as captured by + // the save count) can be merged + return fSaveCount == saveCount && + SkClipOp::kIntersect == op && + (SkClipOp::kIntersect == fOp || this->isReplaceOp()); +} + +bool SkClipStack::Element::rectRectIntersectAllowed(const SkRect& newR, bool newAA) const { + SkASSERT(DeviceSpaceType::kRect == fDeviceSpaceType); + + if (fDoAA == newAA) { + // if the AA setting is the same there is no issue + return true; + } + + if (!SkRect::Intersects(this->getDeviceSpaceRect(), newR)) { + // The calling code will correctly set the result to the empty clip + return true; + } + + if (this->getDeviceSpaceRect().contains(newR)) { + // if the new rect carves out a portion of the old one there is no + // issue + return true; + } + + // So either the two overlap in some complex manner or newR contains oldR. + // In the first, case the edges will require different AA. In the second, + // the AA setting that would be carried forward is incorrect (e.g., oldR + // is AA while newR is BW but since newR contains oldR, oldR will be + // drawn BW) since the new AA setting will predominate. + return false; +} + +// a mirror of combineBoundsRevDiff +void SkClipStack::Element::combineBoundsDiff(FillCombo combination, const SkRect& prevFinite) { + switch (combination) { + case kInvPrev_InvCur_FillCombo: + // In this case the only pixels that can remain set + // are inside the current clip rect since the extensions + // to infinity of both clips cancel out and whatever + // is outside of the current clip is removed + fFiniteBoundType = kNormal_BoundsType; + break; + case kInvPrev_Cur_FillCombo: + // In this case the current op is finite so the only pixels + // that aren't set are whatever isn't set in the previous + // clip and whatever this clip carves out + fFiniteBound.join(prevFinite); + fFiniteBoundType = kInsideOut_BoundsType; + break; + case kPrev_InvCur_FillCombo: + // In this case everything outside of this clip's bound + // is erased, so the only pixels that can remain set + // occur w/in the intersection of the two finite bounds + if (!fFiniteBound.intersect(prevFinite)) { + fFiniteBound.setEmpty(); + fGenID = kEmptyGenID; + } + fFiniteBoundType = kNormal_BoundsType; + break; + case kPrev_Cur_FillCombo: + // The most conservative result bound is that of the + // prior clip. This could be wildly incorrect if the + // second clip either exactly matches the first clip + // (which should yield the empty set) or reduces the + // size of the prior bound (e.g., if the second clip + // exactly matched the bottom half of the prior clip). + // We ignore these two possibilities. + fFiniteBound = prevFinite; + break; + default: + SkDEBUGFAIL("SkClipStack::Element::combineBoundsDiff Invalid fill combination"); + break; + } +} + +// a mirror of combineBoundsUnion +void SkClipStack::Element::combineBoundsIntersection(int combination, const SkRect& prevFinite) { + + switch (combination) { + case kInvPrev_InvCur_FillCombo: + // The only pixels that aren't writable in this case + // occur in the union of the two finite bounds + fFiniteBound.join(prevFinite); + fFiniteBoundType = kInsideOut_BoundsType; + break; + case kInvPrev_Cur_FillCombo: + // In this case the only pixels that will remain writeable + // are within the current clip + break; + case kPrev_InvCur_FillCombo: + // In this case the only pixels that will remain writeable + // are with the previous clip + fFiniteBound = prevFinite; + fFiniteBoundType = kNormal_BoundsType; + break; + case kPrev_Cur_FillCombo: + if (!fFiniteBound.intersect(prevFinite)) { + this->setEmpty(); + } + break; + default: + SkDEBUGFAIL("SkClipStack::Element::combineBoundsIntersection Invalid fill combination"); + break; + } +} + +void SkClipStack::Element::updateBoundAndGenID(const Element* prior) { + // We set this first here but we may overwrite it later if we determine that the clip is + // either wide-open or empty. + fGenID = GetNextGenID(); + + // First, optimistically update the current Element's bound information + // with the current clip's bound + fIsIntersectionOfRects = false; + switch (fDeviceSpaceType) { + case DeviceSpaceType::kRect: + fFiniteBound = this->getDeviceSpaceRect(); + fFiniteBoundType = kNormal_BoundsType; + + if (this->isReplaceOp() || + (SkClipOp::kIntersect == fOp && nullptr == prior) || + (SkClipOp::kIntersect == fOp && prior->fIsIntersectionOfRects && + prior->rectRectIntersectAllowed(this->getDeviceSpaceRect(), fDoAA))) { + fIsIntersectionOfRects = true; + } + break; + case DeviceSpaceType::kRRect: + fFiniteBound = fDeviceSpaceRRect.getBounds(); + fFiniteBoundType = kNormal_BoundsType; + break; + case DeviceSpaceType::kPath: + fFiniteBound = fDeviceSpacePath->getBounds(); + + if (fDeviceSpacePath->isInverseFillType()) { + fFiniteBoundType = kInsideOut_BoundsType; + } else { + fFiniteBoundType = kNormal_BoundsType; + } + break; + case DeviceSpaceType::kShader: + // A shader is infinite. We don't act as wide-open here (which is an empty bounds with + // the inside out type). This is because when the bounds is empty and inside-out, we + // know there's full coverage everywhere. With a shader, there's *unknown* coverage + // everywhere. + fFiniteBound = SkRectPriv::MakeLargeS32(); + fFiniteBoundType = kNormal_BoundsType; + break; + case DeviceSpaceType::kEmpty: + SkDEBUGFAIL("We shouldn't get here with an empty element."); + break; + } + + // Now determine the previous Element's bound information taking into + // account that there may be no previous clip + SkRect prevFinite; + SkClipStack::BoundsType prevType; + + if (nullptr == prior) { + // no prior clip means the entire plane is writable + prevFinite.setEmpty(); // there are no pixels that cannot be drawn to + prevType = kInsideOut_BoundsType; + } else { + prevFinite = prior->fFiniteBound; + prevType = prior->fFiniteBoundType; + } + + FillCombo combination = kPrev_Cur_FillCombo; + if (kInsideOut_BoundsType == fFiniteBoundType) { + combination = (FillCombo) (combination | 0x01); + } + if (kInsideOut_BoundsType == prevType) { + combination = (FillCombo) (combination | 0x02); + } + + SkASSERT(kInvPrev_InvCur_FillCombo == combination || + kInvPrev_Cur_FillCombo == combination || + kPrev_InvCur_FillCombo == combination || + kPrev_Cur_FillCombo == combination); + + // Now integrate with clip with the prior clips + if (!this->isReplaceOp()) { + switch (fOp) { + case SkClipOp::kDifference: + this->combineBoundsDiff(combination, prevFinite); + break; + case SkClipOp::kIntersect: + this->combineBoundsIntersection(combination, prevFinite); + break; + default: + SkDebugf("SkClipOp error\n"); + SkASSERT(0); + break; + } + } // else Replace just ignores everything prior and should already have filled in bounds. +} + +// This constant determines how many Element's are allocated together as a block in +// the deque. As such it needs to balance allocating too much memory vs. +// incurring allocation/deallocation thrashing. It should roughly correspond to +// the deepest save/restore stack we expect to see. +static const int kDefaultElementAllocCnt = 8; + +SkClipStack::SkClipStack() + : fDeque(sizeof(Element), kDefaultElementAllocCnt) + , fSaveCount(0) { +} + +SkClipStack::SkClipStack(void* storage, size_t size) + : fDeque(sizeof(Element), storage, size, kDefaultElementAllocCnt) + , fSaveCount(0) { +} + +SkClipStack::SkClipStack(const SkClipStack& b) + : fDeque(sizeof(Element), kDefaultElementAllocCnt) { + *this = b; +} + +SkClipStack::~SkClipStack() { + reset(); +} + +SkClipStack& SkClipStack::operator=(const SkClipStack& b) { + if (this == &b) { + return *this; + } + reset(); + + fSaveCount = b.fSaveCount; + SkDeque::F2BIter recIter(b.fDeque); + for (const Element* element = (const Element*)recIter.next(); + element != nullptr; + element = (const Element*)recIter.next()) { + new (fDeque.push_back()) Element(*element); + } + + return *this; +} + +bool SkClipStack::operator==(const SkClipStack& b) const { + if (this->getTopmostGenID() == b.getTopmostGenID()) { + return true; + } + if (fSaveCount != b.fSaveCount || + fDeque.count() != b.fDeque.count()) { + return false; + } + SkDeque::F2BIter myIter(fDeque); + SkDeque::F2BIter bIter(b.fDeque); + const Element* myElement = (const Element*)myIter.next(); + const Element* bElement = (const Element*)bIter.next(); + + while (myElement != nullptr && bElement != nullptr) { + if (*myElement != *bElement) { + return false; + } + myElement = (const Element*)myIter.next(); + bElement = (const Element*)bIter.next(); + } + return myElement == nullptr && bElement == nullptr; +} + +void SkClipStack::reset() { + // We used a placement new for each object in fDeque, so we're responsible + // for calling the destructor on each of them as well. + while (!fDeque.empty()) { + Element* element = (Element*)fDeque.back(); + element->~Element(); + fDeque.pop_back(); + } + + fSaveCount = 0; +} + +void SkClipStack::save() { + fSaveCount += 1; +} + +void SkClipStack::restore() { + fSaveCount -= 1; + restoreTo(fSaveCount); +} + +void SkClipStack::restoreTo(int saveCount) { + while (!fDeque.empty()) { + Element* element = (Element*)fDeque.back(); + if (element->fSaveCount <= saveCount) { + break; + } + element->~Element(); + fDeque.pop_back(); + } +} + +SkRect SkClipStack::bounds(const SkIRect& deviceBounds) const { + // TODO: optimize this. + SkRect r; + SkClipStack::BoundsType bounds; + this->getBounds(&r, &bounds); + if (bounds == SkClipStack::kInsideOut_BoundsType) { + return SkRect::Make(deviceBounds); + } + return r.intersect(SkRect::Make(deviceBounds)) ? r : SkRect::MakeEmpty(); +} + +// TODO: optimize this. +bool SkClipStack::isEmpty(const SkIRect& r) const { return this->bounds(r).isEmpty(); } + +void SkClipStack::getBounds(SkRect* canvFiniteBound, + BoundsType* boundType, + bool* isIntersectionOfRects) const { + SkASSERT(canvFiniteBound && boundType); + + Element* element = (Element*)fDeque.back(); + + if (nullptr == element) { + // the clip is wide open - the infinite plane w/ no pixels un-writeable + canvFiniteBound->setEmpty(); + *boundType = kInsideOut_BoundsType; + if (isIntersectionOfRects) { + *isIntersectionOfRects = false; + } + return; + } + + *canvFiniteBound = element->fFiniteBound; + *boundType = element->fFiniteBoundType; + if (isIntersectionOfRects) { + *isIntersectionOfRects = element->fIsIntersectionOfRects; + } +} + +bool SkClipStack::internalQuickContains(const SkRect& rect) const { + Iter iter(*this, Iter::kTop_IterStart); + const Element* element = iter.prev(); + while (element != nullptr) { + // TODO: Once expanding ops are removed, this condition is equiv. to op == kDifference. + if (SkClipOp::kIntersect != element->getOp() && !element->isReplaceOp()) { + return false; + } + if (element->isInverseFilled()) { + // Part of 'rect' could be trimmed off by the inverse-filled clip element + if (SkRect::Intersects(element->getBounds(), rect)) { + return false; + } + } else { + if (!element->contains(rect)) { + return false; + } + } + if (element->isReplaceOp()) { + break; + } + element = iter.prev(); + } + return true; +} + +bool SkClipStack::internalQuickContains(const SkRRect& rrect) const { + Iter iter(*this, Iter::kTop_IterStart); + const Element* element = iter.prev(); + while (element != nullptr) { + // TODO: Once expanding ops are removed, this condition is equiv. to op == kDifference. + if (SkClipOp::kIntersect != element->getOp() && !element->isReplaceOp()) { + return false; + } + if (element->isInverseFilled()) { + // Part of 'rrect' could be trimmed off by the inverse-filled clip element + if (SkRect::Intersects(element->getBounds(), rrect.getBounds())) { + return false; + } + } else { + if (!element->contains(rrect)) { + return false; + } + } + if (element->isReplaceOp()) { + break; + } + element = iter.prev(); + } + return true; +} + +void SkClipStack::pushElement(const Element& element) { + // Use reverse iterator instead of back because Rect path may need previous + SkDeque::Iter iter(fDeque, SkDeque::Iter::kBack_IterStart); + Element* prior = (Element*) iter.prev(); + + if (prior) { + if (element.isReplaceOp()) { + this->restoreTo(fSaveCount - 1); + prior = (Element*) fDeque.back(); + } else if (prior->canBeIntersectedInPlace(fSaveCount, element.getOp())) { + switch (prior->fDeviceSpaceType) { + case Element::DeviceSpaceType::kEmpty: + SkDEBUGCODE(prior->checkEmpty();) + return; + case Element::DeviceSpaceType::kShader: + if (Element::DeviceSpaceType::kShader == element.getDeviceSpaceType()) { + prior->fShader = SkShaders::Blend(SkBlendMode::kSrcIn, + element.fShader, prior->fShader); + Element* priorPrior = (Element*) iter.prev(); + prior->updateBoundAndGenID(priorPrior); + return; + } + break; + case Element::DeviceSpaceType::kRect: + if (Element::DeviceSpaceType::kRect == element.getDeviceSpaceType()) { + if (prior->rectRectIntersectAllowed(element.getDeviceSpaceRect(), + element.isAA())) { + SkRect isectRect; + if (!isectRect.intersect(prior->getDeviceSpaceRect(), + element.getDeviceSpaceRect())) { + prior->setEmpty(); + return; + } + + prior->fDeviceSpaceRRect.setRect(isectRect); + prior->fDoAA = element.isAA(); + Element* priorPrior = (Element*) iter.prev(); + prior->updateBoundAndGenID(priorPrior); + return; + } + break; + } + [[fallthrough]]; + default: + if (!SkRect::Intersects(prior->getBounds(), element.getBounds())) { + prior->setEmpty(); + return; + } + break; + } + } + } + Element* newElement = new (fDeque.push_back()) Element(element); + newElement->updateBoundAndGenID(prior); +} + +void SkClipStack::clipRRect(const SkRRect& rrect, const SkMatrix& matrix, SkClipOp op, bool doAA) { + Element element(fSaveCount, rrect, matrix, op, doAA); + this->pushElement(element); +} + +void SkClipStack::clipRect(const SkRect& rect, const SkMatrix& matrix, SkClipOp op, bool doAA) { + Element element(fSaveCount, rect, matrix, op, doAA); + this->pushElement(element); +} + +void SkClipStack::clipPath(const SkPath& path, const SkMatrix& matrix, SkClipOp op, + bool doAA) { + Element element(fSaveCount, path, matrix, op, doAA); + this->pushElement(element); +} + +void SkClipStack::clipShader(sk_sp shader) { + Element element(fSaveCount, std::move(shader)); + this->pushElement(element); +} + +void SkClipStack::replaceClip(const SkRect& rect, bool doAA) { + Element element(fSaveCount, rect, doAA); + this->pushElement(element); +} + +void SkClipStack::clipEmpty() { + Element* element = (Element*) fDeque.back(); + + if (element && element->canBeIntersectedInPlace(fSaveCount, SkClipOp::kIntersect)) { + element->setEmpty(); + } + new (fDeque.push_back()) Element(fSaveCount); + + ((Element*)fDeque.back())->fGenID = kEmptyGenID; +} + +/////////////////////////////////////////////////////////////////////////////// + +SkClipStack::Iter::Iter() : fStack(nullptr) { +} + +SkClipStack::Iter::Iter(const SkClipStack& stack, IterStart startLoc) + : fStack(&stack) { + this->reset(stack, startLoc); +} + +const SkClipStack::Element* SkClipStack::Iter::next() { + return (const SkClipStack::Element*)fIter.next(); +} + +const SkClipStack::Element* SkClipStack::Iter::prev() { + return (const SkClipStack::Element*)fIter.prev(); +} + +const SkClipStack::Element* SkClipStack::Iter::skipToTopmost(SkClipOp op) { + if (nullptr == fStack) { + return nullptr; + } + + fIter.reset(fStack->fDeque, SkDeque::Iter::kBack_IterStart); + + const SkClipStack::Element* element = nullptr; + + for (element = (const SkClipStack::Element*) fIter.prev(); + element; + element = (const SkClipStack::Element*) fIter.prev()) { + + if (op == element->fOp) { + // The Deque's iterator is actually one pace ahead of the + // returned value. So while "element" is the element we want to + // return, the iterator is actually pointing at (and will + // return on the next "next" or "prev" call) the element + // in front of it in the deque. Bump the iterator forward a + // step so we get the expected result. + if (nullptr == fIter.next()) { + // The reverse iterator has run off the front of the deque + // (i.e., the "op" clip is the first clip) and can't + // recover. Reset the iterator to start at the front. + fIter.reset(fStack->fDeque, SkDeque::Iter::kFront_IterStart); + } + break; + } + } + + if (nullptr == element) { + // There were no "op" clips + fIter.reset(fStack->fDeque, SkDeque::Iter::kFront_IterStart); + } + + return this->next(); +} + +void SkClipStack::Iter::reset(const SkClipStack& stack, IterStart startLoc) { + fStack = &stack; + fIter.reset(stack.fDeque, static_cast(startLoc)); +} + +// helper method +void SkClipStack::getConservativeBounds(int offsetX, + int offsetY, + int maxWidth, + int maxHeight, + SkRect* devBounds, + bool* isIntersectionOfRects) const { + SkASSERT(devBounds); + + devBounds->setLTRB(0, 0, + SkIntToScalar(maxWidth), SkIntToScalar(maxHeight)); + + SkRect temp; + SkClipStack::BoundsType boundType; + + // temp starts off in canvas space here + this->getBounds(&temp, &boundType, isIntersectionOfRects); + if (SkClipStack::kInsideOut_BoundsType == boundType) { + return; + } + + // but is converted to device space here + temp.offset(SkIntToScalar(offsetX), SkIntToScalar(offsetY)); + + if (!devBounds->intersect(temp)) { + devBounds->setEmpty(); + } +} + +bool SkClipStack::isRRect(const SkRect& bounds, SkRRect* rrect, bool* aa) const { + const Element* back = static_cast(fDeque.back()); + if (!back) { + // TODO: return bounds? + return false; + } + // First check if the entire stack is known to be a rect by the top element. + if (back->fIsIntersectionOfRects && back->fFiniteBoundType == BoundsType::kNormal_BoundsType) { + rrect->setRect(back->fFiniteBound); + *aa = back->isAA(); + return true; + } + + if (back->getDeviceSpaceType() != SkClipStack::Element::DeviceSpaceType::kRect && + back->getDeviceSpaceType() != SkClipStack::Element::DeviceSpaceType::kRRect) { + return false; + } + if (back->isReplaceOp()) { + *rrect = back->asDeviceSpaceRRect(); + *aa = back->isAA(); + return true; + } + + if (back->getOp() == SkClipOp::kIntersect) { + SkRect backBounds; + if (!backBounds.intersect(bounds, back->asDeviceSpaceRRect().rect())) { + return false; + } + // We limit to 17 elements. This means the back element will be bounds checked at most 16 + // times if it is an rrect. + int cnt = fDeque.count(); + if (cnt > 17) { + return false; + } + if (cnt > 1) { + SkDeque::Iter iter(fDeque, SkDeque::Iter::kBack_IterStart); + SkAssertResult(static_cast(iter.prev()) == back); + while (const Element* prior = (const Element*)iter.prev()) { + // TODO: Once expanding clip ops are removed, this is equiv. to op == kDifference + if ((prior->getOp() != SkClipOp::kIntersect && !prior->isReplaceOp()) || + !prior->contains(backBounds)) { + return false; + } + if (prior->isReplaceOp()) { + break; + } + } + } + *rrect = back->asDeviceSpaceRRect(); + *aa = back->isAA(); + return true; + } + return false; +} + +uint32_t SkClipStack::GetNextGenID() { + // 0-2 are reserved for invalid, empty & wide-open + static const uint32_t kFirstUnreservedGenID = 3; + static std::atomic nextID{kFirstUnreservedGenID}; + + uint32_t id; + do { + id = nextID.fetch_add(1, std::memory_order_relaxed); + } while (id < kFirstUnreservedGenID); + return id; +} + +uint32_t SkClipStack::getTopmostGenID() const { + if (fDeque.empty()) { + return kWideOpenGenID; + } + + const Element* back = static_cast(fDeque.back()); + if (kInsideOut_BoundsType == back->fFiniteBoundType && back->fFiniteBound.isEmpty() && + Element::DeviceSpaceType::kShader != back->fDeviceSpaceType) { + return kWideOpenGenID; + } + + return back->getGenID(); +} + +#ifdef SK_DEBUG +void SkClipStack::Element::dump() const { + static const char* kTypeStrings[] = { + "empty", + "rect", + "rrect", + "path", + "shader" + }; + static_assert(0 == static_cast(DeviceSpaceType::kEmpty), "enum mismatch"); + static_assert(1 == static_cast(DeviceSpaceType::kRect), "enum mismatch"); + static_assert(2 == static_cast(DeviceSpaceType::kRRect), "enum mismatch"); + static_assert(3 == static_cast(DeviceSpaceType::kPath), "enum mismatch"); + static_assert(4 == static_cast(DeviceSpaceType::kShader), "enum mismatch"); + static_assert(std::size(kTypeStrings) == kTypeCnt, "enum mismatch"); + + const char* opName = this->isReplaceOp() ? "replace" : + (fOp == SkClipOp::kDifference ? "difference" : "intersect"); + SkDebugf("Type: %s, Op: %s, AA: %s, Save Count: %d\n", kTypeStrings[(int)fDeviceSpaceType], + opName, (fDoAA ? "yes" : "no"), fSaveCount); + switch (fDeviceSpaceType) { + case DeviceSpaceType::kEmpty: + SkDebugf("\n"); + break; + case DeviceSpaceType::kRect: + this->getDeviceSpaceRect().dump(); + SkDebugf("\n"); + break; + case DeviceSpaceType::kRRect: + this->getDeviceSpaceRRect().dump(); + SkDebugf("\n"); + break; + case DeviceSpaceType::kPath: + this->getDeviceSpacePath().dump(nullptr, false); + break; + case DeviceSpaceType::kShader: + // SkShaders don't provide much introspection that's worth while. + break; + } +} + +void SkClipStack::dump() const { + B2TIter iter(*this); + const Element* e; + while ((e = iter.next())) { + e->dump(); + SkDebugf("\n"); + } +} +#endif diff --git a/gfx/skia/skia/src/core/SkClipStack.h b/gfx/skia/skia/src/core/SkClipStack.h new file mode 100644 index 0000000000..64c086b352 --- /dev/null +++ b/gfx/skia/skia/src/core/SkClipStack.h @@ -0,0 +1,507 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkClipStack_DEFINED +#define SkClipStack_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkPath.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRect.h" +#include "include/core/SkRegion.h" +#include "include/core/SkShader.h" +#include "include/private/base/SkDeque.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkMessageBus.h" + +// Because a single save/restore state can have multiple clips, this class +// stores the stack depth (fSaveCount) and clips (fDeque) separately. +// Each clip in fDeque stores the stack state to which it belongs +// (i.e., the fSaveCount in force when it was added). Restores are thus +// implemented by removing clips from fDeque that have an fSaveCount larger +// then the freshly decremented count. +class SkClipStack { +public: + enum BoundsType { + // The bounding box contains all the pixels that can be written to + kNormal_BoundsType, + // The bounding box contains all the pixels that cannot be written to. + // The real bound extends out to infinity and all the pixels outside + // of the bound can be written to. Note that some of the pixels inside + // the bound may also be writeable but all pixels that cannot be + // written to are guaranteed to be inside. + kInsideOut_BoundsType + }; + + /** + * An element of the clip stack. It represents a shape combined with the prevoius clip using a + * set operator. Each element can be antialiased or not. + */ + class Element { + public: + /** This indicates the shape type of the clip element in device space. */ + enum class DeviceSpaceType { + //!< This element makes the clip empty (regardless of previous elements). + kEmpty, + //!< This element combines a device space rect with the current clip. + kRect, + //!< This element combines a device space round-rect with the current clip. + kRRect, + //!< This element combines a device space path with the current clip. + kPath, + //!< This element does not have geometry, but applies a shader to the clip + kShader, + + kLastType = kShader + }; + static const int kTypeCnt = (int)DeviceSpaceType::kLastType + 1; + + Element() { + this->initCommon(0, SkClipOp::kIntersect, false); + this->setEmpty(); + } + + Element(const Element&); + + Element(const SkRect& rect, const SkMatrix& m, SkClipOp op, bool doAA) { + this->initRect(0, rect, m, op, doAA); + } + + Element(const SkRRect& rrect, const SkMatrix& m, SkClipOp op, bool doAA) { + this->initRRect(0, rrect, m, op, doAA); + } + + Element(const SkPath& path, const SkMatrix& m, SkClipOp op, bool doAA) { + this->initPath(0, path, m, op, doAA); + } + + Element(sk_sp shader) { + this->initShader(0, std::move(shader)); + } + + Element(const SkRect& rect, bool doAA) { + this->initReplaceRect(0, rect, doAA); + } + + ~Element(); + + bool operator== (const Element& element) const; + bool operator!= (const Element& element) const { return !(*this == element); } + + //!< Call to get the type of the clip element. + DeviceSpaceType getDeviceSpaceType() const { return fDeviceSpaceType; } + + //!< Call to get the save count associated with this clip element. + int getSaveCount() const { return fSaveCount; } + + //!< Call if getDeviceSpaceType() is kPath to get the path. + const SkPath& getDeviceSpacePath() const { + SkASSERT(DeviceSpaceType::kPath == fDeviceSpaceType); + return *fDeviceSpacePath; + } + + //!< Call if getDeviceSpaceType() is kRRect to get the round-rect. + const SkRRect& getDeviceSpaceRRect() const { + SkASSERT(DeviceSpaceType::kRRect == fDeviceSpaceType); + return fDeviceSpaceRRect; + } + + //!< Call if getDeviceSpaceType() is kRect to get the rect. + const SkRect& getDeviceSpaceRect() const { + SkASSERT(DeviceSpaceType::kRect == fDeviceSpaceType && + (fDeviceSpaceRRect.isRect() || fDeviceSpaceRRect.isEmpty())); + return fDeviceSpaceRRect.getBounds(); + } + + //! refShader() const { + return fShader; + } + const SkShader* getShader() const { + return fShader.get(); + } + + //!< Call if getDeviceSpaceType() is not kEmpty to get the set operation used to combine + //!< this element. + SkClipOp getOp() const { return fOp; } + // Augments getOps()'s behavior by requiring a clip reset before the op is applied. + bool isReplaceOp() const { return fIsReplace; } + + //!< Call to get the element as a path, regardless of its type. + void asDeviceSpacePath(SkPath* path) const; + + //!< Call if getType() is not kPath to get the element as a round rect. + const SkRRect& asDeviceSpaceRRect() const { + SkASSERT(DeviceSpaceType::kPath != fDeviceSpaceType); + return fDeviceSpaceRRect; + } + + /** If getType() is not kEmpty this indicates whether the clip shape should be anti-aliased + when it is rasterized. */ + bool isAA() const { return fDoAA; } + + //!< Inverts the fill of the clip shape. Note that a kEmpty element remains kEmpty. + void invertShapeFillType(); + + /** The GenID can be used by clip stack clients to cache representations of the clip. The + ID corresponds to the set of clip elements up to and including this element within the + stack not to the element itself. That is the same clip path in different stacks will + have a different ID since the elements produce different clip result in the context of + their stacks. */ + uint32_t getGenID() const { SkASSERT(kInvalidGenID != fGenID); return fGenID; } + + /** + * Gets the bounds of the clip element, either the rect or path bounds. (Whether the shape + * is inverse filled is not considered.) + */ + const SkRect& getBounds() const; + + /** + * Conservatively checks whether the clip shape contains the rect/rrect. (Whether the shape + * is inverse filled is not considered.) + */ + bool contains(const SkRect& rect) const; + bool contains(const SkRRect& rrect) const; + + /** + * Is the clip shape inverse filled. + */ + bool isInverseFilled() const { + return DeviceSpaceType::kPath == fDeviceSpaceType && + fDeviceSpacePath->isInverseFillType(); + } + +#ifdef SK_DEBUG + /** + * Dumps the element to SkDebugf. This is intended for Skia development debugging + * Don't rely on the existence of this function or the formatting of its output. + */ + void dump() const; +#endif + + private: + friend class SkClipStack; + + SkTLazy fDeviceSpacePath; + SkRRect fDeviceSpaceRRect; + sk_sp fShader; + int fSaveCount; // save count of stack when this element was added. + SkClipOp fOp; + DeviceSpaceType fDeviceSpaceType; + bool fDoAA; + bool fIsReplace; + + /* fFiniteBoundType and fFiniteBound are used to incrementally update the clip stack's + bound. When fFiniteBoundType is kNormal_BoundsType, fFiniteBound represents the + conservative bounding box of the pixels that aren't clipped (i.e., any pixels that can be + drawn to are inside the bound). When fFiniteBoundType is kInsideOut_BoundsType (which + occurs when a clip is inverse filled), fFiniteBound represents the conservative bounding + box of the pixels that _are_ clipped (i.e., any pixels that cannot be drawn to are inside + the bound). When fFiniteBoundType is kInsideOut_BoundsType the actual bound is the + infinite plane. This behavior of fFiniteBoundType and fFiniteBound is required so that we + can capture the cancelling out of the extensions to infinity when two inverse filled + clips are Booleaned together. */ + SkClipStack::BoundsType fFiniteBoundType; + SkRect fFiniteBound; + + // When element is applied to the previous elements in the stack is the result known to be + // equivalent to a single rect intersection? IIOW, is the clip effectively a rectangle. + bool fIsIntersectionOfRects; + + uint32_t fGenID; + Element(int saveCount) { + this->initCommon(saveCount, SkClipOp::kIntersect, false); + this->setEmpty(); + } + + Element(int saveCount, const SkRRect& rrect, const SkMatrix& m, SkClipOp op, bool doAA) { + this->initRRect(saveCount, rrect, m, op, doAA); + } + + Element(int saveCount, const SkRect& rect, const SkMatrix& m, SkClipOp op, bool doAA) { + this->initRect(saveCount, rect, m, op, doAA); + } + + Element(int saveCount, const SkPath& path, const SkMatrix& m, SkClipOp op, bool doAA) { + this->initPath(saveCount, path, m, op, doAA); + } + + Element(int saveCount, sk_sp shader) { + this->initShader(saveCount, std::move(shader)); + } + + Element(int saveCount, const SkRect& rect, bool doAA) { + this->initReplaceRect(saveCount, rect, doAA); + } + + void initCommon(int saveCount, SkClipOp op, bool doAA); + void initRect(int saveCount, const SkRect&, const SkMatrix&, SkClipOp, bool doAA); + void initRRect(int saveCount, const SkRRect&, const SkMatrix&, SkClipOp, bool doAA); + void initPath(int saveCount, const SkPath&, const SkMatrix&, SkClipOp, bool doAA); + void initAsPath(int saveCount, const SkPath&, const SkMatrix&, SkClipOp, bool doAA); + void initShader(int saveCount, sk_sp); + void initReplaceRect(int saveCount, const SkRect&, bool doAA); + + void setEmpty(); + + // All Element methods below are only used within SkClipStack.cpp + inline void checkEmpty() const; + inline bool canBeIntersectedInPlace(int saveCount, SkClipOp op) const; + /* This method checks to see if two rect clips can be safely merged into one. The issue here + is that to be strictly correct all the edges of the resulting rect must have the same + anti-aliasing. */ + bool rectRectIntersectAllowed(const SkRect& newR, bool newAA) const; + /** Determines possible finite bounds for the Element given the previous element of the + stack */ + void updateBoundAndGenID(const Element* prior); + // The different combination of fill & inverse fill when combining bounding boxes + enum FillCombo { + kPrev_Cur_FillCombo, + kPrev_InvCur_FillCombo, + kInvPrev_Cur_FillCombo, + kInvPrev_InvCur_FillCombo + }; + // per-set operation functions used by updateBoundAndGenID(). + inline void combineBoundsDiff(FillCombo combination, const SkRect& prevFinite); + inline void combineBoundsIntersection(int combination, const SkRect& prevFinite); + }; + + SkClipStack(); + SkClipStack(void* storage, size_t size); + SkClipStack(const SkClipStack& b); + ~SkClipStack(); + + SkClipStack& operator=(const SkClipStack& b); + bool operator==(const SkClipStack& b) const; + bool operator!=(const SkClipStack& b) const { return !(*this == b); } + + void reset(); + + int getSaveCount() const { return fSaveCount; } + void save(); + void restore(); + + class AutoRestore { + public: + AutoRestore(SkClipStack* cs, bool doSave) + : fCS(cs), fSaveCount(cs->getSaveCount()) + { + if (doSave) { + fCS->save(); + } + } + ~AutoRestore() { + SkASSERT(fCS->getSaveCount() >= fSaveCount); // no underflow + while (fCS->getSaveCount() > fSaveCount) { + fCS->restore(); + } + } + + private: + SkClipStack* fCS; + const int fSaveCount; + }; + + /** + * getBounds places the current finite bound in its first parameter. In its + * second, it indicates which kind of bound is being returned. If + * 'canvFiniteBound' is a normal bounding box then it encloses all writeable + * pixels. If 'canvFiniteBound' is an inside out bounding box then it + * encloses all the un-writeable pixels and the true/normal bound is the + * infinite plane. isIntersectionOfRects is an optional parameter + * that is true if 'canvFiniteBound' resulted from an intersection of rects. + */ + void getBounds(SkRect* canvFiniteBound, + BoundsType* boundType, + bool* isIntersectionOfRects = nullptr) const; + + SkRect bounds(const SkIRect& deviceBounds) const; + bool isEmpty(const SkIRect& deviceBounds) const; + + /** + * Returns true if the input (r)rect in device space is entirely contained + * by the clip. A return value of false does not guarantee that the (r)rect + * is not contained by the clip. + */ + bool quickContains(const SkRect& devRect) const { + return this->isWideOpen() || this->internalQuickContains(devRect); + } + + bool quickContains(const SkRRect& devRRect) const { + return this->isWideOpen() || this->internalQuickContains(devRRect); + } + + void clipDevRect(const SkIRect& ir, SkClipOp op) { + SkRect r; + r.set(ir); + this->clipRect(r, SkMatrix::I(), op, false); + } + void clipRect(const SkRect&, const SkMatrix& matrix, SkClipOp, bool doAA); + void clipRRect(const SkRRect&, const SkMatrix& matrix, SkClipOp, bool doAA); + void clipPath(const SkPath&, const SkMatrix& matrix, SkClipOp, bool doAA); + void clipShader(sk_sp); + // An optimized version of clipDevRect(emptyRect, kIntersect, ...) + void clipEmpty(); + + void replaceClip(const SkRect& devRect, bool doAA); + + /** + * isWideOpen returns true if the clip state corresponds to the infinite + * plane (i.e., draws are not limited at all) + */ + bool isWideOpen() const { return this->getTopmostGenID() == kWideOpenGenID; } + + /** + * This method quickly and conservatively determines whether the entire stack is equivalent to + * intersection with a rrect given a bounds, where the rrect must not contain the entire bounds. + * + * @param bounds A bounds on what will be drawn through the clip. The clip only need be + * equivalent to a intersection with a rrect for draws within the bounds. The + * returned rrect must intersect the bounds but need not be contained by the + * bounds. + * @param rrect If return is true rrect will contain the rrect equivalent to the stack. + * @param aa If return is true aa will indicate whether the equivalent rrect clip is + * antialiased. + * @return true if the stack is equivalent to a single rrect intersect clip, false otherwise. + */ + bool isRRect(const SkRect& bounds, SkRRect* rrect, bool* aa) const; + + /** + * The generation ID has three reserved values to indicate special + * (potentially ignorable) cases + */ + static const uint32_t kInvalidGenID = 0; //!< Invalid id that is never returned by + //!< SkClipStack. Useful when caching clips + //!< based on GenID. + static const uint32_t kEmptyGenID = 1; // no pixels writeable + static const uint32_t kWideOpenGenID = 2; // all pixels writeable + + uint32_t getTopmostGenID() const; + +#ifdef SK_DEBUG + /** + * Dumps the contents of the clip stack to SkDebugf. This is intended for Skia development + * debugging. Don't rely on the existence of this function or the formatting of its output. + */ + void dump() const; +#endif + +public: + class Iter { + public: + enum IterStart { + kBottom_IterStart = SkDeque::Iter::kFront_IterStart, + kTop_IterStart = SkDeque::Iter::kBack_IterStart + }; + + /** + * Creates an uninitialized iterator. Must be reset() + */ + Iter(); + + Iter(const SkClipStack& stack, IterStart startLoc); + + /** + * Return the clip element for this iterator. If next()/prev() returns NULL, then the + * iterator is done. + */ + const Element* next(); + const Element* prev(); + + /** + * Moves the iterator to the topmost element with the specified RegionOp and returns that + * element. If no clip element with that op is found, the first element is returned. + */ + const Element* skipToTopmost(SkClipOp op); + + /** + * Restarts the iterator on a clip stack. + */ + void reset(const SkClipStack& stack, IterStart startLoc); + + private: + const SkClipStack* fStack; + SkDeque::Iter fIter; + }; + + /** + * The B2TIter iterates from the bottom of the stack to the top. + * It inherits privately from Iter to prevent access to reverse iteration. + */ + class B2TIter : private Iter { + public: + B2TIter() {} + + /** + * Wrap Iter's 2 parameter ctor to force initialization to the + * beginning of the deque/bottom of the stack + */ + B2TIter(const SkClipStack& stack) + : INHERITED(stack, kBottom_IterStart) { + } + + using Iter::next; + + /** + * Wrap Iter::reset to force initialization to the + * beginning of the deque/bottom of the stack + */ + void reset(const SkClipStack& stack) { + this->INHERITED::reset(stack, kBottom_IterStart); + } + + private: + + using INHERITED = Iter; + }; + + /** + * GetConservativeBounds returns a conservative bound of the current clip. + * Since this could be the infinite plane (if inverse fills were involved) the + * maxWidth and maxHeight parameters can be used to limit the returned bound + * to the expected drawing area. Similarly, the offsetX and offsetY parameters + * allow the caller to offset the returned bound to account for translated + * drawing areas (i.e., those resulting from a saveLayer). For finite bounds, + * the translation (+offsetX, +offsetY) is applied before the clamp to the + * maximum rectangle: [0,maxWidth) x [0,maxHeight). + * isIntersectionOfRects is an optional parameter that is true when + * 'devBounds' is the result of an intersection of rects. In this case + * 'devBounds' is the exact answer/clip. + */ + void getConservativeBounds(int offsetX, + int offsetY, + int maxWidth, + int maxHeight, + SkRect* devBounds, + bool* isIntersectionOfRects = nullptr) const; + +private: + friend class Iter; + + SkDeque fDeque; + int fSaveCount; + + bool internalQuickContains(const SkRect& devRect) const; + bool internalQuickContains(const SkRRect& devRRect) const; + + /** + * Helper for clipDevPath, etc. + */ + void pushElement(const Element& element); + + /** + * Restore the stack back to the specified save count. + */ + void restoreTo(int saveCount); + + /** + * Return the next unique generation ID. + */ + static uint32_t GetNextGenID(); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkClipStackDevice.cpp b/gfx/skia/skia/src/core/SkClipStackDevice.cpp new file mode 100644 index 0000000000..d30fd6880d --- /dev/null +++ b/gfx/skia/skia/src/core/SkClipStackDevice.cpp @@ -0,0 +1,124 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkClipStackDevice.h" +#include "src/core/SkDraw.h" +#include "src/core/SkRasterClip.h" + +SkIRect SkClipStackDevice::onDevClipBounds() const { + SkIRect r = fClipStack.bounds(this->imageInfo().bounds()).roundOut(); + if (!r.isEmpty()) { + SkASSERT(this->imageInfo().bounds().contains(r)); + } + return r; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkClipStackDevice::onSave() { + fClipStack.save(); +} + +void SkClipStackDevice::onRestore() { + fClipStack.restore(); +} + +void SkClipStackDevice::onClipRect(const SkRect& rect, SkClipOp op, bool aa) { + fClipStack.clipRect(rect, this->localToDevice(), op, aa); +} + +void SkClipStackDevice::onClipRRect(const SkRRect& rrect, SkClipOp op, bool aa) { + fClipStack.clipRRect(rrect, this->localToDevice(), op, aa); +} + +void SkClipStackDevice::onClipPath(const SkPath& path, SkClipOp op, bool aa) { + fClipStack.clipPath(path, this->localToDevice(), op, aa); +} + +void SkClipStackDevice::onClipShader(sk_sp shader) { + fClipStack.clipShader(std::move(shader)); +} + +void SkClipStackDevice::onClipRegion(const SkRegion& rgn, SkClipOp op) { + SkIPoint origin = this->getOrigin(); + SkRegion tmp; + SkPath path; + rgn.getBoundaryPath(&path); + path.transform(SkMatrix::Translate(-origin)); + fClipStack.clipPath(path, SkMatrix::I(), op, false); +} + +void SkClipStackDevice::onReplaceClip(const SkIRect& rect) { + SkRect deviceRect = SkMatrixPriv::MapRect(this->globalToDevice(), SkRect::Make(rect)); + fClipStack.replaceClip(deviceRect, /*doAA=*/false); +} + +bool SkClipStackDevice::onClipIsAA() const { + SkClipStack::B2TIter iter(fClipStack); + const SkClipStack::Element* element; + + while ((element = iter.next()) != nullptr) { + if (element->isAA()) { + return true; + } + } + return false; +} + +bool SkClipStackDevice::onClipIsWideOpen() const { + return fClipStack.quickContains(SkRect::MakeIWH(this->width(), this->height())); +} + +void SkClipStackDevice::onAsRgnClip(SkRegion* rgn) const { + SkClipStack::BoundsType boundType; + bool isIntersectionOfRects; + SkRect bounds; + fClipStack.getBounds(&bounds, &boundType, &isIntersectionOfRects); + if (isIntersectionOfRects && SkClipStack::kNormal_BoundsType == boundType) { + rgn->setRect(bounds.round()); + } else { + SkRegion boundsRgn({0, 0, this->width(), this->height()}); + SkPath tmpPath; + + *rgn = boundsRgn; + SkClipStack::B2TIter iter(fClipStack); + while (auto elem = iter.next()) { + tmpPath.rewind(); + elem->asDeviceSpacePath(&tmpPath); + SkRegion tmpRgn; + tmpRgn.setPath(tmpPath, boundsRgn); + if (elem->isReplaceOp()) { + // All replace elements are rectangles + // TODO: SkClipStack can be simplified to be I,D,R ops now, which means element + // iteration can be from top of the stack to the most recent replace element. + // When that's done, this loop will be simplifiable. + rgn->setRect(elem->getDeviceSpaceRect().round()); + } else { + rgn->op(tmpRgn, static_cast(elem->getOp())); + } + } + } +} + +SkBaseDevice::ClipType SkClipStackDevice::onGetClipType() const { + if (fClipStack.isWideOpen()) { + return ClipType::kRect; + } + if (fClipStack.isEmpty(SkIRect::MakeWH(this->width(), this->height()))) { + return ClipType::kEmpty; + } else { + SkClipStack::BoundsType boundType; + bool isIntersectionOfRects; + SkRect bounds; + fClipStack.getBounds(&bounds, &boundType, &isIntersectionOfRects); + if (isIntersectionOfRects && SkClipStack::kNormal_BoundsType == boundType) { + return ClipType::kRect; + } else { + return ClipType::kComplex; + } + } +} diff --git a/gfx/skia/skia/src/core/SkClipStackDevice.h b/gfx/skia/skia/src/core/SkClipStackDevice.h new file mode 100644 index 0000000000..eff1f1a440 --- /dev/null +++ b/gfx/skia/skia/src/core/SkClipStackDevice.h @@ -0,0 +1,49 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkClipStackDevice_DEFINED +#define SkClipStackDevice_DEFINED + +#include "src/core/SkClipStack.h" +#include "src/core/SkDevice.h" + +class SkClipStackDevice : public SkBaseDevice { +public: + SkClipStackDevice(const SkImageInfo& info, const SkSurfaceProps& props) + : SkBaseDevice(info, props) + , fClipStack(fStorage, sizeof(fStorage)) + {} + + SkClipStack& cs() { return fClipStack; } + const SkClipStack& cs() const { return fClipStack; } + +protected: + void onSave() override; + void onRestore() override; + void onClipRect(const SkRect& rect, SkClipOp, bool aa) override; + void onClipRRect(const SkRRect& rrect, SkClipOp, bool aa) override; + void onClipPath(const SkPath& path, SkClipOp, bool aa) override; + void onClipShader(sk_sp) override; + void onClipRegion(const SkRegion& deviceRgn, SkClipOp) override; + void onReplaceClip(const SkIRect& rect) override; + bool onClipIsAA() const override; + bool onClipIsWideOpen() const override; + void onAsRgnClip(SkRegion*) const override; + ClipType onGetClipType() const override; + SkIRect onDevClipBounds() const override; + +private: + enum { + kPreallocCount = 16 // empirically determined, adjust as needed to reduce mallocs + }; + intptr_t fStorage[kPreallocCount * sizeof(SkClipStack::Element) / sizeof(intptr_t)]; + SkClipStack fClipStack; + + using INHERITED = SkBaseDevice; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkColor.cpp b/gfx/skia/skia/src/core/SkColor.cpp new file mode 100644 index 0000000000..02a79e43eb --- /dev/null +++ b/gfx/skia/skia/src/core/SkColor.cpp @@ -0,0 +1,170 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColor.h" +#include "include/core/SkColorPriv.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTPin.h" +#include "src/base/SkVx.h" +#include "src/core/SkSwizzlePriv.h" + +#include + +SkPMColor SkPreMultiplyARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + return SkPremultiplyARGBInline(a, r, g, b); +} + +SkPMColor SkPreMultiplyColor(SkColor c) { + return SkPremultiplyARGBInline(SkColorGetA(c), SkColorGetR(c), + SkColorGetG(c), SkColorGetB(c)); +} + +/////////////////////////////////////////////////////////////////////////////// + +static inline SkScalar ByteToScalar(U8CPU x) { + SkASSERT(x <= 255); + return SkIntToScalar(x) / 255; +} + +static inline SkScalar ByteDivToScalar(int numer, U8CPU denom) { + // cast to keep the answer signed + return SkIntToScalar(numer) / (int)denom; +} + +void SkRGBToHSV(U8CPU r, U8CPU g, U8CPU b, SkScalar hsv[3]) { + SkASSERT(hsv); + + unsigned min = std::min(r, std::min(g, b)); + unsigned max = std::max(r, std::max(g, b)); + unsigned delta = max - min; + + SkScalar v = ByteToScalar(max); + SkASSERT(v >= 0 && v <= SK_Scalar1); + + if (0 == delta) { // we're a shade of gray + hsv[0] = 0; + hsv[1] = 0; + hsv[2] = v; + return; + } + + SkScalar s = ByteDivToScalar(delta, max); + SkASSERT(s >= 0 && s <= SK_Scalar1); + + SkScalar h; + if (r == max) { + h = ByteDivToScalar(g - b, delta); + } else if (g == max) { + h = SkIntToScalar(2) + ByteDivToScalar(b - r, delta); + } else { // b == max + h = SkIntToScalar(4) + ByteDivToScalar(r - g, delta); + } + + h *= 60; + if (h < 0) { + h += SkIntToScalar(360); + } + SkASSERT(h >= 0 && h < SkIntToScalar(360)); + + hsv[0] = h; + hsv[1] = s; + hsv[2] = v; +} + +SkColor SkHSVToColor(U8CPU a, const SkScalar hsv[3]) { + SkASSERT(hsv); + + SkScalar s = SkTPin(hsv[1], 0.0f, 1.0f); + SkScalar v = SkTPin(hsv[2], 0.0f, 1.0f); + + U8CPU v_byte = SkScalarRoundToInt(v * 255); + + if (SkScalarNearlyZero(s)) { // shade of gray + return SkColorSetARGB(a, v_byte, v_byte, v_byte); + } + SkScalar hx = (hsv[0] < 0 || hsv[0] >= SkIntToScalar(360)) ? 0 : hsv[0]/60; + SkScalar w = SkScalarFloorToScalar(hx); + SkScalar f = hx - w; + + unsigned p = SkScalarRoundToInt((SK_Scalar1 - s) * v * 255); + unsigned q = SkScalarRoundToInt((SK_Scalar1 - (s * f)) * v * 255); + unsigned t = SkScalarRoundToInt((SK_Scalar1 - (s * (SK_Scalar1 - f))) * v * 255); + + unsigned r, g, b; + + SkASSERT((unsigned)(w) < 6); + switch ((unsigned)(w)) { + case 0: r = v_byte; g = t; b = p; break; + case 1: r = q; g = v_byte; b = p; break; + case 2: r = p; g = v_byte; b = t; break; + case 3: r = p; g = q; b = v_byte; break; + case 4: r = t; g = p; b = v_byte; break; + default: r = v_byte; g = p; b = q; break; + } + return SkColorSetARGB(a, r, g, b); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +template <> +SkColor4f SkColor4f::FromColor(SkColor bgra) { + SkColor4f rgba; + auto c4f = Sk4f_fromL32(bgra); +#ifdef SK_CPU_BENDIAN + // ARGB -> RGBA + c4f = skvx::shuffle<1, 2, 3, 0>(c4f); +#else + // BGRA -> RGBA + c4f = swizzle_rb(c4f); +#endif + c4f.store(rgba.vec()); + return rgba; +} + +template <> +SkColor SkColor4f::toSkColor() const { + auto c4f = skvx::float4::Load(this->vec()); +#ifdef SK_CPU_BENDIAN + // RGBA -> ARGB + c4f = skvx::shuffle<3, 0, 1, 2>(c4f); +#else + // RGBA -> BGRA + c4f = swizzle_rb(c4f); +#endif + return Sk4f_toL32(c4f); +} + +template <> +uint32_t SkColor4f::toBytes_RGBA() const { + return Sk4f_toL32(skvx::float4::Load(this->vec())); +} + +template <> +SkColor4f SkColor4f::FromBytes_RGBA(uint32_t c) { + SkColor4f color; + Sk4f_fromL32(c).store(&color); + return color; +} + +template <> +SkPMColor4f SkPMColor4f::FromPMColor(SkPMColor c) { + SkPMColor4f color; + swizzle_rb_if_bgra(Sk4f_fromL32(c)).store(&color); + return color; +} + +template <> +uint32_t SkPMColor4f::toBytes_RGBA() const { + return Sk4f_toL32(skvx::float4::Load(this->vec())); +} + +template <> +SkPMColor4f SkPMColor4f::FromBytes_RGBA(uint32_t c) { + SkPMColor4f color; + Sk4f_fromL32(c).store(&color); + return color; +} diff --git a/gfx/skia/skia/src/core/SkColorFilter.cpp b/gfx/skia/skia/src/core/SkColorFilter.cpp new file mode 100644 index 0000000000..e4328e1b71 --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorFilter.cpp @@ -0,0 +1,633 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRefCnt.h" +#include "include/core/SkString.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/base/SkTDArray.h" +#include "modules/skcms/skcms.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorFilterPriv.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +bool SkColorFilter::asAColorMode(SkColor* color, SkBlendMode* mode) const { + return as_CFB(this)->onAsAColorMode(color, mode); +} + +bool SkColorFilter::asAColorMatrix(float matrix[20]) const { + return as_CFB(this)->onAsAColorMatrix(matrix); +} + +bool SkColorFilter::isAlphaUnchanged() const { + return as_CFB(this)->onIsAlphaUnchanged(); +} + +sk_sp SkColorFilter::Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs) { + return sk_sp(static_cast( + SkFlattenable::Deserialize( + kSkColorFilter_Type, data, size, procs).release())); +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkColorFilterBase::onAsAColorMode(SkColor*, SkBlendMode*) const { + return false; +} + +bool SkColorFilterBase::onAsAColorMatrix(float matrix[20]) const { + return false; +} + +#if defined(SK_GANESH) +GrFPResult SkColorFilterBase::asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext* context, + const GrColorInfo& dstColorInfo, + const SkSurfaceProps& props) const { + // This color filter doesn't implement `asFragmentProcessor`. + return GrFPFailure(std::move(inputFP)); +} +#endif + +skvm::Color SkColorFilterBase::program(skvm::Builder* p, skvm::Color c, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const { + skvm::F32 original = c.a; + if ((c = this->onProgram(p,c, dst, uniforms,alloc))) { + if (this->isAlphaUnchanged()) { + c.a = original; + } + return c; + } + //SkDebugf("cannot program %s\n", this->getTypeName()); + return {}; +} + +SkColor SkColorFilter::filterColor(SkColor c) const { + // This is mostly meaningless. We should phase-out this call entirely. + SkColorSpace* cs = nullptr; + return this->filterColor4f(SkColor4f::FromColor(c), cs, cs).toSkColor(); +} + +SkColor4f SkColorFilter::filterColor4f(const SkColor4f& origSrcColor, SkColorSpace* srcCS, + SkColorSpace* dstCS) const { + SkPMColor4f color = { origSrcColor.fR, origSrcColor.fG, origSrcColor.fB, origSrcColor.fA }; + SkColorSpaceXformSteps(srcCS, kUnpremul_SkAlphaType, + dstCS, kPremul_SkAlphaType).apply(color.vec()); + + return as_CFB(this)->onFilterColor4f(color, dstCS).unpremul(); +} + +SkPMColor4f SkColorFilterBase::onFilterColor4f(const SkPMColor4f& color, + SkColorSpace* dstCS) const { + constexpr size_t kEnoughForCommonFilters = 512; // big enough for compose+colormatrix + SkSTArenaAlloc alloc; + SkRasterPipeline pipeline(&alloc); + pipeline.append_constant_color(&alloc, color.vec()); + SkMatrixProvider matrixProvider(SkMatrix::I()); + SkSurfaceProps props{}; // default OK; colorFilters don't render text + SkStageRec rec = {&pipeline, &alloc, kRGBA_F32_SkColorType, dstCS, color.unpremul(), props}; + + if (as_CFB(this)->appendStages(rec, color.fA == 1)) { + SkPMColor4f dst; + SkRasterPipeline_MemoryCtx dstPtr = { &dst, 0 }; + pipeline.append(SkRasterPipelineOp::store_f32, &dstPtr); + pipeline.run(0,0, 1,1); + return dst; + } + + // This filter doesn't support SkRasterPipeline... try skvm. + skvm::Builder b; + skvm::Uniforms uni(b.uniform(), 4); + SkColor4f uniColor = {color.fR, color.fG, color.fB, color.fA}; + SkColorInfo dstInfo = {kRGBA_F32_SkColorType, kPremul_SkAlphaType, sk_ref_sp(dstCS)}; + if (skvm::Color filtered = + as_CFB(this)->program(&b, b.uniformColor(uniColor, &uni), dstInfo, &uni, &alloc)) { + + b.store({skvm::PixelFormat::FLOAT, 32,32,32,32, 0,32,64,96}, + b.varying(), filtered); + + const bool allow_jit = false; // We're only filtering one color, no point JITing. + b.done("filterColor4f", allow_jit).eval(1, uni.buf.data(), &color); + return color; + } + + SkASSERT(false); + return SkPMColor4f{0,0,0,0}; +} + +#if defined(SK_GRAPHITE) +void SkColorFilterBase::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + // Return the input color as-is. + PassthroughShaderBlock::BeginBlock(keyContext, builder, gatherer); + builder->endBlock(); +} +#endif + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +class SkComposeColorFilter final : public SkColorFilterBase { +public: + bool onIsAlphaUnchanged() const override { + // Can only claim alphaunchanged support if both our proxys do. + return fOuter->isAlphaUnchanged() && fInner->isAlphaUnchanged(); + } + + bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override { + bool innerIsOpaque = shaderIsOpaque; + if (!fInner->isAlphaUnchanged()) { + innerIsOpaque = false; + } + return fInner->appendStages(rec, shaderIsOpaque) && + fOuter->appendStages(rec, innerIsOpaque); + } + + skvm::Color onProgram(skvm::Builder* p, skvm::Color c, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const override { + c = fInner->program(p, c, dst, uniforms, alloc); + return c ? fOuter->program(p, c, dst, uniforms, alloc) : skvm::Color{}; + } + +#if defined(SK_GANESH) + GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext* context, + const GrColorInfo& dstColorInfo, + const SkSurfaceProps& props) const override { + // Unfortunately, we need to clone the input before we know we need it. This lets us return + // the original FP if either internal color filter fails. + auto inputClone = inputFP ? inputFP->clone() : nullptr; + + auto [innerSuccess, innerFP] = + fInner->asFragmentProcessor(std::move(inputFP), context, dstColorInfo, props); + if (!innerSuccess) { + return GrFPFailure(std::move(inputClone)); + } + + auto [outerSuccess, outerFP] = + fOuter->asFragmentProcessor(std::move(innerFP), context, dstColorInfo, props); + if (!outerSuccess) { + return GrFPFailure(std::move(inputClone)); + } + + return GrFPSuccess(std::move(outerFP)); + } +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const override { + using namespace skgpu::graphite; + + ComposeColorFilterBlock::BeginBlock(keyContext, builder, gatherer); + + as_CFB(fInner)->addToKey(keyContext, builder, gatherer); + as_CFB(fOuter)->addToKey(keyContext, builder, gatherer); + + builder->endBlock(); + } +#endif // SK_GRAPHITE + +protected: + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeFlattenable(fOuter.get()); + buffer.writeFlattenable(fInner.get()); + } + +private: + friend void ::SkRegisterComposeColorFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkComposeColorFilter) + + SkComposeColorFilter(sk_sp outer, sk_sp inner) + : fOuter(as_CFB_sp(std::move(outer))) + , fInner(as_CFB_sp(std::move(inner))) + {} + + sk_sp fOuter; + sk_sp fInner; + + friend class SkColorFilter; + + using INHERITED = SkColorFilter; +}; + +sk_sp SkComposeColorFilter::CreateProc(SkReadBuffer& buffer) { + sk_sp outer(buffer.readColorFilter()); + sk_sp inner(buffer.readColorFilter()); + return outer ? outer->makeComposed(std::move(inner)) : inner; +} + +sk_sp SkColorFilter::makeComposed(sk_sp inner) const { + if (!inner) { + return sk_ref_sp(this); + } + + return sk_sp(new SkComposeColorFilter(sk_ref_sp(this), std::move(inner))); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +class ColorSpaceXformColorFilter final : public SkColorFilterBase { +public: + ColorSpaceXformColorFilter(sk_sp src, sk_sp dst) + : fSrc(std::move(src)) + , fDst(std::move(dst)) + , fSteps( + // We handle premul/unpremul separately, so here just always upm->upm. + fSrc.get(), + kUnpremul_SkAlphaType, + fDst.get(), + kUnpremul_SkAlphaType) + + {} + +#if defined(SK_GANESH) + GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext* context, + const GrColorInfo& dstColorInfo, + const SkSurfaceProps& props) const override { + // wish our caller would let us know if our input was opaque... + constexpr SkAlphaType alphaType = kPremul_SkAlphaType; + return GrFPSuccess(GrColorSpaceXformEffect::Make( + std::move(inputFP), fSrc.get(), alphaType, fDst.get(), alphaType)); + SkUNREACHABLE; + } +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const override { + using namespace skgpu::graphite; + + constexpr SkAlphaType alphaType = kPremul_SkAlphaType; + ColorSpaceTransformBlock::ColorSpaceTransformData data( + fSrc.get(), alphaType, fDst.get(), alphaType); + ColorSpaceTransformBlock::BeginBlock(keyContext, builder, gatherer, &data); + builder->endBlock(); + } +#endif + + bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override { + if (!shaderIsOpaque) { + rec.fPipeline->append(SkRasterPipelineOp::unpremul); + } + + fSteps.apply(rec.fPipeline); + + if (!shaderIsOpaque) { + rec.fPipeline->append(SkRasterPipelineOp::premul); + } + return true; + } + + skvm::Color onProgram(skvm::Builder* p, skvm::Color c, const SkColorInfo& dst, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const override { + return premul(fSteps.program(p, uniforms, unpremul(c))); + } + +protected: + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeDataAsByteArray(fSrc->serialize().get()); + buffer.writeDataAsByteArray(fDst->serialize().get()); + } + +private: + friend void ::SkRegisterColorSpaceXformColorFilterFlattenable(); + SK_FLATTENABLE_HOOKS(ColorSpaceXformColorFilter) + static sk_sp LegacyGammaOnlyCreateProc(SkReadBuffer& buffer); + + const sk_sp fSrc; + const sk_sp fDst; + SkColorSpaceXformSteps fSteps; + + friend class SkColorFilter; + using INHERITED = SkColorFilterBase; +}; + +sk_sp ColorSpaceXformColorFilter::LegacyGammaOnlyCreateProc(SkReadBuffer& buffer) { + uint32_t dir = buffer.read32(); + if (!buffer.validate(dir <= 1)) { + return nullptr; + } + if (dir == 0) { + return SkColorFilters::LinearToSRGBGamma(); + } + return SkColorFilters::SRGBToLinearGamma(); +} + +sk_sp ColorSpaceXformColorFilter::CreateProc(SkReadBuffer& buffer) { + sk_sp colorSpaces[2]; + for (int i = 0; i < 2; ++i) { + auto data = buffer.readByteArrayAsData(); + if (!buffer.validate(data != nullptr)) { + return nullptr; + } + colorSpaces[i] = SkColorSpace::Deserialize(data->data(), data->size()); + if (!buffer.validate(colorSpaces[i] != nullptr)) { + return nullptr; + } + } + return sk_sp( + new ColorSpaceXformColorFilter(std::move(colorSpaces[0]), std::move(colorSpaces[1]))); +} + +sk_sp SkColorFilters::LinearToSRGBGamma() { + static SkColorFilter* gSingleton = new ColorSpaceXformColorFilter( + SkColorSpace::MakeSRGBLinear(), SkColorSpace::MakeSRGB()); + return sk_ref_sp(gSingleton); +} + +sk_sp SkColorFilters::SRGBToLinearGamma() { + static SkColorFilter* gSingleton = new ColorSpaceXformColorFilter( + SkColorSpace::MakeSRGB(), SkColorSpace::MakeSRGBLinear()); + return sk_ref_sp(gSingleton); +} + +sk_sp SkColorFilterPriv::MakeColorSpaceXform(sk_sp src, + sk_sp dst) { + return sk_make_sp(std::move(src), std::move(dst)); +} + +class SkWorkingFormatColorFilter final : public SkColorFilterBase { +public: + SkWorkingFormatColorFilter(sk_sp child, + const skcms_TransferFunction* tf, + const skcms_Matrix3x3* gamut, + const SkAlphaType* at) { + fChild = std::move(child); + if (tf) { fTF = *tf; fUseDstTF = false; } + if (gamut) { fGamut = *gamut; fUseDstGamut = false; } + if (at) { fAT = *at; fUseDstAT = false; } + } + + sk_sp workingFormat(const sk_sp& dstCS, SkAlphaType* at) const { + skcms_TransferFunction tf = fTF; + skcms_Matrix3x3 gamut = fGamut; + + if (fUseDstTF ) { SkAssertResult(dstCS->isNumericalTransferFn(&tf)); } + if (fUseDstGamut) { SkAssertResult(dstCS->toXYZD50 (&gamut)); } + + *at = fUseDstAT ? kPremul_SkAlphaType : fAT; + return SkColorSpace::MakeRGB(tf, gamut); + } + +#if defined(SK_GANESH) + GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext* context, + const GrColorInfo& dstColorInfo, + const SkSurfaceProps& props) const override { + sk_sp dstCS = dstColorInfo.refColorSpace(); + if (!dstCS) { dstCS = SkColorSpace::MakeSRGB(); } + + SkAlphaType workingAT; + sk_sp workingCS = this->workingFormat(dstCS, &workingAT); + + GrColorInfo dst = {dstColorInfo.colorType(), dstColorInfo.alphaType(), dstCS}, + working = {dstColorInfo.colorType(), workingAT, workingCS}; + + auto [ok, fp] = as_CFB(fChild)->asFragmentProcessor( + GrColorSpaceXformEffect::Make(std::move(inputFP), dst,working), context, working, + props); + + return ok ? GrFPSuccess(GrColorSpaceXformEffect::Make(std::move(fp), working,dst)) + : GrFPFailure(std::move(fp)); + } +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const override { + using namespace skgpu::graphite; + + const SkAlphaType dstAT = keyContext.dstColorInfo().alphaType(); + sk_sp dstCS = keyContext.dstColorInfo().refColorSpace(); + if (!dstCS) { + dstCS = SkColorSpace::MakeSRGB(); + } + + SkAlphaType workingAT; + sk_sp workingCS = this->workingFormat(dstCS, &workingAT); + + ColorSpaceTransformBlock::ColorSpaceTransformData data1( + dstCS.get(), dstAT, workingCS.get(), workingAT); + ColorSpaceTransformBlock::BeginBlock(keyContext, builder, gatherer, &data1); + builder->endBlock(); + + as_CFB(fChild)->addToKey(keyContext, builder, gatherer); + + ColorSpaceTransformBlock::ColorSpaceTransformData data2( + workingCS.get(), workingAT, dstCS.get(), dstAT); + ColorSpaceTransformBlock::BeginBlock(keyContext, builder, gatherer, &data2); + builder->endBlock(); + } +#endif + + bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override { + sk_sp dstCS = sk_ref_sp(rec.fDstCS); + + if (!dstCS) { dstCS = SkColorSpace::MakeSRGB(); } + + SkAlphaType workingAT; + sk_sp workingCS = this->workingFormat(dstCS, &workingAT); + + SkColorInfo dst = {rec.fDstColorType, kPremul_SkAlphaType, dstCS}, + working = {rec.fDstColorType, workingAT, workingCS}; + + const auto* dstToWorking = rec.fAlloc->make(dst, working); + const auto* workingToDst = rec.fAlloc->make(working, dst); + + // Any SkSL effects might reference the paint color, which is already in the destination + // color space. We need to transform it to the working space for consistency. + SkColor4f paintColorInWorkingSpace = rec.fPaintColor; + dstToWorking->apply(paintColorInWorkingSpace.vec()); + + SkStageRec workingRec = {rec.fPipeline, + rec.fAlloc, + rec.fDstColorType, + workingCS.get(), + paintColorInWorkingSpace, + rec.fSurfaceProps}; + + dstToWorking->apply(rec.fPipeline); + if (!as_CFB(fChild)->appendStages(workingRec, shaderIsOpaque)) { + return false; + } + workingToDst->apply(rec.fPipeline); + return true; + } + + skvm::Color onProgram(skvm::Builder* p, skvm::Color c, const SkColorInfo& rawDst, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const override { + sk_sp dstCS = rawDst.refColorSpace(); + if (!dstCS) { dstCS = SkColorSpace::MakeSRGB(); } + + SkAlphaType workingAT; + sk_sp workingCS = this->workingFormat(dstCS, &workingAT); + + SkColorInfo dst = {rawDst.colorType(), kPremul_SkAlphaType, dstCS}, + working = {rawDst.colorType(), workingAT, workingCS}; + + c = SkColorSpaceXformSteps{dst,working}.program(p, uniforms, c); + c = as_CFB(fChild)->program(p, c, working, uniforms, alloc); + return c ? SkColorSpaceXformSteps{working,dst}.program(p, uniforms, c) + : c; + } + + SkPMColor4f onFilterColor4f(const SkPMColor4f& origColor, + SkColorSpace* rawDstCS) const override { + sk_sp dstCS = sk_ref_sp(rawDstCS); + if (!dstCS) { dstCS = SkColorSpace::MakeSRGB(); } + + SkAlphaType workingAT; + sk_sp workingCS = this->workingFormat(dstCS, &workingAT); + + SkColorInfo dst = {kUnknown_SkColorType, kPremul_SkAlphaType, dstCS}, + working = {kUnknown_SkColorType, workingAT, workingCS}; + + SkPMColor4f color = origColor; + SkColorSpaceXformSteps{dst,working}.apply(color.vec()); + color = as_CFB(fChild)->onFilterColor4f(color, working.colorSpace()); + SkColorSpaceXformSteps{working,dst}.apply(color.vec()); + return color; + } + + bool onIsAlphaUnchanged() const override { return fChild->isAlphaUnchanged(); } + +private: + friend void ::SkRegisterWorkingFormatColorFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkWorkingFormatColorFilter) + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeFlattenable(fChild.get()); + buffer.writeBool(fUseDstTF); + buffer.writeBool(fUseDstGamut); + buffer.writeBool(fUseDstAT); + if (!fUseDstTF) { buffer.writeScalarArray(&fTF.g, 7); } + if (!fUseDstGamut) { buffer.writeScalarArray(&fGamut.vals[0][0], 9); } + if (!fUseDstAT) { buffer.writeInt(fAT); } + } + + sk_sp fChild; + skcms_TransferFunction fTF; bool fUseDstTF = true; + skcms_Matrix3x3 fGamut; bool fUseDstGamut = true; + SkAlphaType fAT; bool fUseDstAT = true; +}; + +sk_sp SkWorkingFormatColorFilter::CreateProc(SkReadBuffer& buffer) { + sk_sp child = buffer.readColorFilter(); + bool useDstTF = buffer.readBool(), + useDstGamut = buffer.readBool(), + useDstAT = buffer.readBool(); + + skcms_TransferFunction tf; + skcms_Matrix3x3 gamut; + SkAlphaType at; + + if (!useDstTF) { buffer.readScalarArray(&tf.g, 7); } + if (!useDstGamut) { buffer.readScalarArray(&gamut.vals[0][0], 9); } + if (!useDstAT) { at = buffer.read32LE(kLastEnum_SkAlphaType); } + + return SkColorFilterPriv::WithWorkingFormat(std::move(child), + useDstTF ? nullptr : &tf, + useDstGamut ? nullptr : &gamut, + useDstAT ? nullptr : &at); +} + +sk_sp SkColorFilterPriv::WithWorkingFormat(sk_sp child, + const skcms_TransferFunction* tf, + const skcms_Matrix3x3* gamut, + const SkAlphaType* at) { + return sk_make_sp(std::move(child), tf, gamut, at); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkColorFilters::Lerp(float weight, sk_sp cf0, + sk_sp cf1) { +#ifdef SK_ENABLE_SKSL + if (!cf0 && !cf1) { + return nullptr; + } + if (SkScalarIsNaN(weight)) { + return nullptr; + } + + if (cf0 == cf1) { + return cf0; // or cf1 + } + + if (weight <= 0) { + return cf0; + } + if (weight >= 1) { + return cf1; + } + + static const SkRuntimeEffect* effect = SkMakeCachedRuntimeEffect( + SkRuntimeEffect::MakeForColorFilter, + "uniform colorFilter cf0;" + "uniform colorFilter cf1;" + "uniform half weight;" + "half4 main(half4 color) {" + "return mix(cf0.eval(color), cf1.eval(color), weight);" + "}" + ).release(); + SkASSERT(effect); + + sk_sp inputs[] = {cf0,cf1}; + return effect->makeColorFilter(SkData::MakeWithCopy(&weight, sizeof(weight)), + inputs, std::size(inputs)); +#else + // TODO(skia:12197) + return nullptr; +#endif +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkRegisterComposeColorFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkComposeColorFilter); +} + +void SkRegisterColorSpaceXformColorFilterFlattenable() { + SK_REGISTER_FLATTENABLE(ColorSpaceXformColorFilter); + // TODO(ccameron): Remove after grace period for SKPs to stop using old serialization. + SkFlattenable::Register("SkSRGBGammaColorFilter", + ColorSpaceXformColorFilter::LegacyGammaOnlyCreateProc); +} + +void SkRegisterWorkingFormatColorFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkWorkingFormatColorFilter); +} diff --git a/gfx/skia/skia/src/core/SkColorFilterBase.h b/gfx/skia/skia/src/core/SkColorFilterBase.h new file mode 100644 index 0000000000..31652db6be --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorFilterBase.h @@ -0,0 +1,141 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorFilterBase_DEFINED +#define SkColorFilterBase_DEFINED + +#include "include/core/SkColorFilter.h" +#include "include/private/SkColorData.h" +#include "src/core/SkVM_fwd.h" + +#include +#include + +class GrColorInfo; +class GrFragmentProcessor; +class GrRecordingContext; +class SkArenaAlloc; +class SkBitmap; +class SkColorInfo; +class SkColorSpace; +class SkRuntimeEffect; +class SkSurfaceProps; +struct SkStageRec; +using GrFPResult = std::tuple>; + +namespace skgpu::graphite { +class KeyContext; +class PaintParamsKeyBuilder; +class PipelineDataGatherer; +} + +class SkColorFilterBase : public SkColorFilter { +public: + SK_WARN_UNUSED_RESULT + virtual bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const = 0; + + SK_WARN_UNUSED_RESULT + skvm::Color program(skvm::Builder*, skvm::Color, + const SkColorInfo& dst, skvm::Uniforms*, SkArenaAlloc*) const; + + /** Returns the flags for this filter. Override in subclasses to return custom flags. + */ + virtual bool onIsAlphaUnchanged() const { return false; } + +#if defined(SK_GANESH) + /** + * A subclass may implement this factory function to work with the GPU backend. It returns + * a GrFragmentProcessor that implements the color filter in GPU shader code. + * + * The fragment processor receives a input FP that generates a premultiplied input color, and + * produces a premultiplied output color. + * + * A GrFPFailure indicates that the color filter isn't implemented for the GPU backend. + */ + virtual GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext* context, + const GrColorInfo& dstColorInfo, + const SkSurfaceProps& props) const; +#endif + + bool affectsTransparentBlack() const { + return this->filterColor(SK_ColorTRANSPARENT) != SK_ColorTRANSPARENT; + } + + virtual SkRuntimeEffect* asRuntimeEffect() const { return nullptr; } + + static SkFlattenable::Type GetFlattenableType() { + return kSkColorFilter_Type; + } + + SkFlattenable::Type getFlattenableType() const override { + return kSkColorFilter_Type; + } + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr) { + return sk_sp(static_cast( + SkFlattenable::Deserialize( + kSkColorFilter_Type, data, size, procs).release())); + } + + virtual SkPMColor4f onFilterColor4f(const SkPMColor4f& color, SkColorSpace* dstCS) const; + +#if defined(SK_GRAPHITE) + /** + Add implementation details, for the specified backend, of this SkColorFilter to the + provided key. + + @param keyContext backend context for key creation + @param builder builder for creating the key for this SkShader + @param gatherer if non-null, storage for this colorFilter's data + */ + virtual void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const; +#endif + +protected: + SkColorFilterBase() {} + + virtual bool onAsAColorMatrix(float[20]) const; + virtual bool onAsAColorMode(SkColor* color, SkBlendMode* bmode) const; + +private: + virtual skvm::Color onProgram(skvm::Builder*, skvm::Color, + const SkColorInfo& dst, skvm::Uniforms*, SkArenaAlloc*) const = 0; + + friend class SkColorFilter; + + using INHERITED = SkFlattenable; +}; + +static inline SkColorFilterBase* as_CFB(SkColorFilter* filter) { + return static_cast(filter); +} + +static inline const SkColorFilterBase* as_CFB(const SkColorFilter* filter) { + return static_cast(filter); +} + +static inline const SkColorFilterBase* as_CFB(const sk_sp& filter) { + return static_cast(filter.get()); +} + +static inline sk_sp as_CFB_sp(sk_sp filter) { + return sk_sp(static_cast(filter.release())); +} + + +void SkRegisterComposeColorFilterFlattenable(); +void SkRegisterMatrixColorFilterFlattenable(); +void SkRegisterModeColorFilterFlattenable(); +void SkRegisterColorSpaceXformColorFilterFlattenable(); +void SkRegisterTableColorFilterFlattenable(); +void SkRegisterWorkingFormatColorFilterFlattenable(); + +#endif diff --git a/gfx/skia/skia/src/core/SkColorFilterPriv.h b/gfx/skia/skia/src/core/SkColorFilterPriv.h new file mode 100644 index 0000000000..2a243103f7 --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorFilterPriv.h @@ -0,0 +1,34 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorFilterPriv_DEFINED +#define SkColorFilterPriv_DEFINED + +#include "include/core/SkColorFilter.h" + +class SkColorSpace; +struct skcms_Matrix3x3; +struct skcms_TransferFunction; + +class SkColorFilterPriv { +public: + static sk_sp MakeGaussian(); + + // Make a color filter that will convert from src to dst. + static sk_sp MakeColorSpaceXform(sk_sp src, + sk_sp dst); + + // Runs the child filter in a different working color format than usual (premul in + // destination surface's color space), with all inputs and outputs expressed in this format. + // Each non-null {tf,gamut,at} parameter overrides that particular aspect of the color format. + static sk_sp WithWorkingFormat(sk_sp child, + const skcms_TransferFunction* tf, + const skcms_Matrix3x3* gamut, + const SkAlphaType* at); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkColorFilter_Matrix.cpp b/gfx/skia/skia/src/core/SkColorFilter_Matrix.cpp new file mode 100644 index 0000000000..7ecdbcc9d6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorFilter_Matrix.cpp @@ -0,0 +1,256 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRefCnt.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/effects/SkColorMatrix.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkColorData.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif // SK_GRAPHITE + +static bool is_alpha_unchanged(const float matrix[20]) { + const float* srcA = matrix + 15; + + return SkScalarNearlyZero (srcA[0]) + && SkScalarNearlyZero (srcA[1]) + && SkScalarNearlyZero (srcA[2]) + && SkScalarNearlyEqual(srcA[3], 1) + && SkScalarNearlyZero (srcA[4]); +} + +class SkColorFilter_Matrix final : public SkColorFilterBase { +public: + enum class Domain : uint8_t { kRGBA, kHSLA }; + + explicit SkColorFilter_Matrix(const float array[20], Domain); + + bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override; + + bool onIsAlphaUnchanged() const override { return fAlphaIsUnchanged; } + +#if defined(SK_GANESH) + GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext*, + const GrColorInfo&, + const SkSurfaceProps&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +private: + friend void ::SkRegisterMatrixColorFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkColorFilter_Matrix) + + void flatten(SkWriteBuffer&) const override; + bool onAsAColorMatrix(float matrix[20]) const override; + + skvm::Color onProgram(skvm::Builder*, skvm::Color, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, SkArenaAlloc*) const override; + + float fMatrix[20]; + bool fAlphaIsUnchanged; + Domain fDomain; +}; + +SkColorFilter_Matrix::SkColorFilter_Matrix(const float array[20], Domain domain) + : fAlphaIsUnchanged(is_alpha_unchanged(array)) + , fDomain(domain) { + memcpy(fMatrix, array, 20 * sizeof(float)); +} + +void SkColorFilter_Matrix::flatten(SkWriteBuffer& buffer) const { + SkASSERT(sizeof(fMatrix)/sizeof(float) == 20); + buffer.writeScalarArray(fMatrix, 20); + + // RGBA flag + buffer.writeBool(fDomain == Domain::kRGBA); +} + +sk_sp SkColorFilter_Matrix::CreateProc(SkReadBuffer& buffer) { + float matrix[20]; + if (!buffer.readScalarArray(matrix, 20)) { + return nullptr; + } + + auto is_rgba = buffer.readBool(); + return is_rgba ? SkColorFilters::Matrix(matrix) + : SkColorFilters::HSLAMatrix(matrix); +} + +bool SkColorFilter_Matrix::onAsAColorMatrix(float matrix[20]) const { + if (matrix) { + memcpy(matrix, fMatrix, 20 * sizeof(float)); + } + return true; +} + +bool SkColorFilter_Matrix::appendStages(const SkStageRec& rec, bool shaderIsOpaque) const { + const bool willStayOpaque = shaderIsOpaque && fAlphaIsUnchanged, + hsla = fDomain == Domain::kHSLA; + + SkRasterPipeline* p = rec.fPipeline; + if (!shaderIsOpaque) { p->append(SkRasterPipelineOp::unpremul); } + if ( hsla) { p->append(SkRasterPipelineOp::rgb_to_hsl); } + if ( true) { p->append(SkRasterPipelineOp::matrix_4x5, fMatrix); } + if ( hsla) { p->append(SkRasterPipelineOp::hsl_to_rgb); } + if ( true) { p->append(SkRasterPipelineOp::clamp_01); } + if (!willStayOpaque) { p->append(SkRasterPipelineOp::premul); } + return true; +} + + +skvm::Color SkColorFilter_Matrix::onProgram(skvm::Builder* p, skvm::Color c, + const SkColorInfo& /*dst*/, + skvm::Uniforms* uniforms, SkArenaAlloc*) const { + auto apply_matrix = [&](auto xyzw) { + auto dot = [&](int j) { + auto custom_mad = [&](float f, skvm::F32 m, skvm::F32 a) { + // skvm::Builder won't fold f*0 == 0, but we shouldn't encounter NaN here. + // While looking, also simplify f == ±1. Anything else becomes a uniform. + return f == 0.0f ? a + : f == +1.0f ? a + m + : f == -1.0f ? a - m + : m * p->uniformF(uniforms->pushF(f)) + a; + }; + + // Similarly, let skvm::Builder fold away the additive bias when zero. + const float b = fMatrix[4+j*5]; + skvm::F32 bias = b == 0.0f ? p->splat(0.0f) + : p->uniformF(uniforms->pushF(b)); + + auto [x,y,z,w] = xyzw; + return custom_mad(fMatrix[0+j*5], x, + custom_mad(fMatrix[1+j*5], y, + custom_mad(fMatrix[2+j*5], z, + custom_mad(fMatrix[3+j*5], w, bias)))); + }; + return std::make_tuple(dot(0), dot(1), dot(2), dot(3)); + }; + + c = unpremul(c); + + if (fDomain == Domain::kHSLA) { + auto [h,s,l,a] = apply_matrix(p->to_hsla(c)); + c = p->to_rgba({h,s,l,a}); + } else { + auto [r,g,b,a] = apply_matrix(c); + c = {r,g,b,a}; + } + + return premul(clamp01(c)); +} + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/effects/GrSkSLFP.h" + +static std::unique_ptr rgb_to_hsl(std::unique_ptr child) { + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForColorFilter, + "half4 main(half4 color) {" + "return $rgb_to_hsl(color.rgb, color.a);" + "}" + ); + SkASSERT(SkRuntimeEffectPriv::SupportsConstantOutputForConstantInput(effect)); + return GrSkSLFP::Make(effect, "RgbToHsl", std::move(child), + GrSkSLFP::OptFlags::kPreservesOpaqueInput); +} + +static std::unique_ptr hsl_to_rgb(std::unique_ptr child) { + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForColorFilter, + "half4 main(half4 color) {" + "return $hsl_to_rgb(color.rgb, color.a);" + "}" + ); + SkASSERT(SkRuntimeEffectPriv::SupportsConstantOutputForConstantInput(effect)); + return GrSkSLFP::Make(effect, "HslToRgb", std::move(child), + GrSkSLFP::OptFlags::kPreservesOpaqueInput); +} + +GrFPResult SkColorFilter_Matrix::asFragmentProcessor(std::unique_ptr fp, + GrRecordingContext*, + const GrColorInfo&, + const SkSurfaceProps&) const { + switch (fDomain) { + case Domain::kRGBA: + fp = GrFragmentProcessor::ColorMatrix(std::move(fp), fMatrix, + /* unpremulInput = */ true, + /* clampRGBOutput = */ true, + /* premulOutput = */ true); + break; + + case Domain::kHSLA: + fp = rgb_to_hsl(std::move(fp)); + fp = GrFragmentProcessor::ColorMatrix(std::move(fp), fMatrix, + /* unpremulInput = */ false, + /* clampRGBOutput = */ false, + /* premulOutput = */ false); + fp = hsl_to_rgb(std::move(fp)); + break; + } + + return GrFPSuccess(std::move(fp)); +} + +#endif // defined(SK_GANESH) + +#if defined(SK_GRAPHITE) +void SkColorFilter_Matrix::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + MatrixColorFilterBlock::MatrixColorFilterData matrixCFData(fMatrix, + fDomain == Domain::kHSLA); + + MatrixColorFilterBlock::BeginBlock(keyContext, builder, gatherer, &matrixCFData); + builder->endBlock(); +} +#endif // SK_GRAPHITE + +/////////////////////////////////////////////////////////////////////////////// + +static sk_sp MakeMatrix(const float array[20], + SkColorFilter_Matrix::Domain domain) { + if (!sk_floats_are_finite(array, 20)) { + return nullptr; + } + return sk_make_sp(array, domain); +} + +sk_sp SkColorFilters::Matrix(const float array[20]) { + return MakeMatrix(array, SkColorFilter_Matrix::Domain::kRGBA); +} + +sk_sp SkColorFilters::Matrix(const SkColorMatrix& cm) { + return MakeMatrix(cm.fMat.data(), SkColorFilter_Matrix::Domain::kRGBA); +} + +sk_sp SkColorFilters::HSLAMatrix(const float array[20]) { + return MakeMatrix(array, SkColorFilter_Matrix::Domain::kHSLA); +} + +sk_sp SkColorFilters::HSLAMatrix(const SkColorMatrix& cm) { + return MakeMatrix(cm.fMat.data(), SkColorFilter_Matrix::Domain::kHSLA); +} + +void SkRegisterMatrixColorFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkColorFilter_Matrix); +} diff --git a/gfx/skia/skia/src/core/SkColorSpace.cpp b/gfx/skia/skia/src/core/SkColorSpace.cpp new file mode 100644 index 0000000000..d93435d0cc --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorSpace.cpp @@ -0,0 +1,411 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/private/SkOpts_spi.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTemplates.h" +#include "modules/skcms/skcms.h" +#include "src/core/SkColorSpacePriv.h" + +#include + +bool SkColorSpacePrimaries::toXYZD50(skcms_Matrix3x3* toXYZ_D50) const { + return skcms_PrimariesToXYZD50(fRX, fRY, fGX, fGY, fBX, fBY, fWX, fWY, toXYZ_D50); +} + +SkColorSpace::SkColorSpace(const skcms_TransferFunction& transferFn, + const skcms_Matrix3x3& toXYZD50) + : fTransferFn(transferFn) + , fToXYZD50(toXYZD50) { + fTransferFnHash = SkOpts::hash_fn(&fTransferFn, 7*sizeof(float), 0); + fToXYZD50Hash = SkOpts::hash_fn(&fToXYZD50, 9*sizeof(float), 0); +} + +static bool xyz_almost_equal(const skcms_Matrix3x3& mA, const skcms_Matrix3x3& mB) { + for (int r = 0; r < 3; ++r) { + for (int c = 0; c < 3; ++c) { + if (!color_space_almost_equal(mA.vals[r][c], mB.vals[r][c])) { + return false; + } + } + } + + return true; +} + +sk_sp SkColorSpace::MakeRGB(const skcms_TransferFunction& transferFn, + const skcms_Matrix3x3& toXYZ) { + if (skcms_TransferFunction_getType(&transferFn) == skcms_TFType_Invalid) { + return nullptr; + } + + const skcms_TransferFunction* tf = &transferFn; + + if (is_almost_srgb(transferFn)) { + if (xyz_almost_equal(toXYZ, SkNamedGamut::kSRGB)) { + return SkColorSpace::MakeSRGB(); + } + tf = &SkNamedTransferFn::kSRGB; + } else if (is_almost_2dot2(transferFn)) { + tf = &SkNamedTransferFn::k2Dot2; + } else if (is_almost_linear(transferFn)) { + if (xyz_almost_equal(toXYZ, SkNamedGamut::kSRGB)) { + return SkColorSpace::MakeSRGBLinear(); + } + tf = &SkNamedTransferFn::kLinear; + } + + return sk_sp(new SkColorSpace(*tf, toXYZ)); +} + +class SkColorSpaceSingletonFactory { +public: + static SkColorSpace* Make(const skcms_TransferFunction& transferFn, + const skcms_Matrix3x3& to_xyz) { + return new SkColorSpace(transferFn, to_xyz); + } +}; + +SkColorSpace* sk_srgb_singleton() { + static SkColorSpace* cs = SkColorSpaceSingletonFactory::Make(SkNamedTransferFn::kSRGB, + SkNamedGamut::kSRGB); + return cs; +} + +SkColorSpace* sk_srgb_linear_singleton() { + static SkColorSpace* cs = SkColorSpaceSingletonFactory::Make(SkNamedTransferFn::kLinear, + SkNamedGamut::kSRGB); + return cs; +} + +sk_sp SkColorSpace::MakeSRGB() { + return sk_ref_sp(sk_srgb_singleton()); +} + +sk_sp SkColorSpace::MakeSRGBLinear() { + return sk_ref_sp(sk_srgb_linear_singleton()); +} + +void SkColorSpace::computeLazyDstFields() const { + fLazyDstFieldsOnce([this] { + + // Invert 3x3 gamut, defaulting to sRGB if we can't. + { + if (!skcms_Matrix3x3_invert(&fToXYZD50, &fFromXYZD50)) { + SkAssertResult(skcms_Matrix3x3_invert(&skcms_sRGB_profile()->toXYZD50, + &fFromXYZD50)); + } + } + + // Invert transfer function, defaulting to sRGB if we can't. + { + if (!skcms_TransferFunction_invert(&fTransferFn, &fInvTransferFn)) { + fInvTransferFn = *skcms_sRGB_Inverse_TransferFunction(); + } + } + + }); +} + +bool SkColorSpace::isNumericalTransferFn(skcms_TransferFunction* coeffs) const { + // TODO: Change transferFn/invTransferFn to just operate on skcms_TransferFunction (all callers + // already pass pointers to an skcms struct). Then remove this function, and update the two + // remaining callers to do the right thing with transferFn and classify. + this->transferFn(coeffs); + return skcms_TransferFunction_getType(coeffs) == skcms_TFType_sRGBish; +} + +void SkColorSpace::transferFn(float gabcdef[7]) const { + memcpy(gabcdef, &fTransferFn, 7*sizeof(float)); +} + +void SkColorSpace::transferFn(skcms_TransferFunction* fn) const { + *fn = fTransferFn; +} + +void SkColorSpace::invTransferFn(skcms_TransferFunction* fn) const { + this->computeLazyDstFields(); + *fn = fInvTransferFn; +} + +bool SkColorSpace::toXYZD50(skcms_Matrix3x3* toXYZD50) const { + *toXYZD50 = fToXYZD50; + return true; +} + +void SkColorSpace::gamutTransformTo(const SkColorSpace* dst, skcms_Matrix3x3* src_to_dst) const { + dst->computeLazyDstFields(); + *src_to_dst = skcms_Matrix3x3_concat(&dst->fFromXYZD50, &fToXYZD50); +} + +bool SkColorSpace::isSRGB() const { + return sk_srgb_singleton() == this; +} + +bool SkColorSpace::gammaCloseToSRGB() const { + // Nearly-equal transfer functions were snapped at construction time, so just do an exact test + return memcmp(&fTransferFn, &SkNamedTransferFn::kSRGB, 7*sizeof(float)) == 0; +} + +bool SkColorSpace::gammaIsLinear() const { + // Nearly-equal transfer functions were snapped at construction time, so just do an exact test + return memcmp(&fTransferFn, &SkNamedTransferFn::kLinear, 7*sizeof(float)) == 0; +} + +sk_sp SkColorSpace::makeLinearGamma() const { + if (this->gammaIsLinear()) { + return sk_ref_sp(const_cast(this)); + } + return SkColorSpace::MakeRGB(SkNamedTransferFn::kLinear, fToXYZD50); +} + +sk_sp SkColorSpace::makeSRGBGamma() const { + if (this->gammaCloseToSRGB()) { + return sk_ref_sp(const_cast(this)); + } + return SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, fToXYZD50); +} + +sk_sp SkColorSpace::makeColorSpin() const { + skcms_Matrix3x3 spin = {{ + { 0, 0, 1 }, + { 1, 0, 0 }, + { 0, 1, 0 }, + }}; + + skcms_Matrix3x3 spun = skcms_Matrix3x3_concat(&fToXYZD50, &spin); + + return sk_sp(new SkColorSpace(fTransferFn, spun)); +} + +void SkColorSpace::toProfile(skcms_ICCProfile* profile) const { + skcms_Init (profile); + skcms_SetTransferFunction(profile, &fTransferFn); + skcms_SetXYZD50 (profile, &fToXYZD50); +} + +sk_sp SkColorSpace::Make(const skcms_ICCProfile& profile) { + // TODO: move below ≈sRGB test? + if (!profile.has_toXYZD50 || !profile.has_trc) { + return nullptr; + } + + if (skcms_ApproximatelyEqualProfiles(&profile, skcms_sRGB_profile())) { + return SkColorSpace::MakeSRGB(); + } + + // TODO: can we save this work and skip lazily inverting the matrix later? + skcms_Matrix3x3 inv; + if (!skcms_Matrix3x3_invert(&profile.toXYZD50, &inv)) { + return nullptr; + } + + // We can't work with tables or mismatched parametric curves, + // but if they all look close enough to sRGB, that's fine. + // TODO: should we maybe do this unconditionally to snap near-sRGB parametrics to sRGB? + const skcms_Curve* trc = profile.trc; + if (trc[0].table_entries != 0 || + trc[1].table_entries != 0 || + trc[2].table_entries != 0 || + 0 != memcmp(&trc[0].parametric, &trc[1].parametric, sizeof(trc[0].parametric)) || + 0 != memcmp(&trc[0].parametric, &trc[2].parametric, sizeof(trc[0].parametric))) + { + if (skcms_TRCs_AreApproximateInverse(&profile, skcms_sRGB_Inverse_TransferFunction())) { + return SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, profile.toXYZD50); + } + return nullptr; + } + + return SkColorSpace::MakeRGB(profile.trc[0].parametric, profile.toXYZD50); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +enum Version { + k0_Version, // Initial version, header + flags for matrix and profile + k1_Version, // Simple header (version tag) + 16 floats + + kCurrent_Version = k1_Version, +}; + +enum NamedColorSpace { + kSRGB_NamedColorSpace, + kAdobeRGB_NamedColorSpace, + kSRGBLinear_NamedColorSpace, +}; + +enum NamedGamma { + kLinear_NamedGamma, + kSRGB_NamedGamma, + k2Dot2_NamedGamma, +}; + +struct ColorSpaceHeader { + // Flag values, only used by old (k0_Version) serialization + inline static constexpr uint8_t kMatrix_Flag = 1 << 0; + inline static constexpr uint8_t kICC_Flag = 1 << 1; + inline static constexpr uint8_t kTransferFn_Flag = 1 << 3; + + uint8_t fVersion = kCurrent_Version; + + // Other fields are only used by k0_Version. Could be re-purposed in future versions. + uint8_t fNamed = 0; + uint8_t fGammaNamed = 0; + uint8_t fFlags = 0; +}; + +size_t SkColorSpace::writeToMemory(void* memory) const { + if (memory) { + *((ColorSpaceHeader*) memory) = ColorSpaceHeader(); + memory = SkTAddOffset(memory, sizeof(ColorSpaceHeader)); + + memcpy(memory, &fTransferFn, 7 * sizeof(float)); + memory = SkTAddOffset(memory, 7 * sizeof(float)); + + memcpy(memory, &fToXYZD50, 9 * sizeof(float)); + } + + return sizeof(ColorSpaceHeader) + 16 * sizeof(float); +} + +sk_sp SkColorSpace::serialize() const { + sk_sp data = SkData::MakeUninitialized(this->writeToMemory(nullptr)); + this->writeToMemory(data->writable_data()); + return data; +} + +sk_sp SkColorSpace::Deserialize(const void* data, size_t length) { + if (length < sizeof(ColorSpaceHeader)) { + return nullptr; + } + + ColorSpaceHeader header = *((const ColorSpaceHeader*) data); + data = SkTAddOffset(data, sizeof(ColorSpaceHeader)); + length -= sizeof(ColorSpaceHeader); + if (k1_Version == header.fVersion) { + if (length < 16 * sizeof(float)) { + return nullptr; + } + + skcms_TransferFunction transferFn; + memcpy(&transferFn, data, 7 * sizeof(float)); + data = SkTAddOffset(data, 7 * sizeof(float)); + + skcms_Matrix3x3 toXYZ; + memcpy(&toXYZ, data, 9 * sizeof(float)); + return SkColorSpace::MakeRGB(transferFn, toXYZ); + } else if (k0_Version == header.fVersion) { + if (0 == header.fFlags) { + switch ((NamedColorSpace)header.fNamed) { + case kSRGB_NamedColorSpace: + return SkColorSpace::MakeSRGB(); + case kSRGBLinear_NamedColorSpace: + return SkColorSpace::MakeSRGBLinear(); + case kAdobeRGB_NamedColorSpace: + return SkColorSpace::MakeRGB(SkNamedTransferFn::k2Dot2, + SkNamedGamut::kAdobeRGB); + } + } + + auto make_named_tf = [=](const skcms_TransferFunction& tf) { + if (ColorSpaceHeader::kMatrix_Flag != header.fFlags || length < 12 * sizeof(float)) { + return sk_sp(nullptr); + } + + // Version 0 matrix is row-major 3x4 + skcms_Matrix3x3 toXYZ; + memcpy(&toXYZ.vals[0][0], (const float*)data + 0, 3 * sizeof(float)); + memcpy(&toXYZ.vals[1][0], (const float*)data + 4, 3 * sizeof(float)); + memcpy(&toXYZ.vals[2][0], (const float*)data + 8, 3 * sizeof(float)); + return SkColorSpace::MakeRGB(tf, toXYZ); + }; + + switch ((NamedGamma) header.fGammaNamed) { + case kSRGB_NamedGamma: + return make_named_tf(SkNamedTransferFn::kSRGB); + case k2Dot2_NamedGamma: + return make_named_tf(SkNamedTransferFn::k2Dot2); + case kLinear_NamedGamma: + return make_named_tf(SkNamedTransferFn::kLinear); + default: + break; + } + + switch (header.fFlags) { + case ColorSpaceHeader::kICC_Flag: { + // Deprecated and unsupported code path + return nullptr; + } + case ColorSpaceHeader::kTransferFn_Flag: { + if (length < 19 * sizeof(float)) { + return nullptr; + } + + // Version 0 TF is in abcdefg order + skcms_TransferFunction transferFn; + transferFn.a = *(((const float*) data) + 0); + transferFn.b = *(((const float*) data) + 1); + transferFn.c = *(((const float*) data) + 2); + transferFn.d = *(((const float*) data) + 3); + transferFn.e = *(((const float*) data) + 4); + transferFn.f = *(((const float*) data) + 5); + transferFn.g = *(((const float*) data) + 6); + data = SkTAddOffset(data, 7 * sizeof(float)); + + // Version 0 matrix is row-major 3x4 + skcms_Matrix3x3 toXYZ; + memcpy(&toXYZ.vals[0][0], (const float*)data + 0, 3 * sizeof(float)); + memcpy(&toXYZ.vals[1][0], (const float*)data + 4, 3 * sizeof(float)); + memcpy(&toXYZ.vals[2][0], (const float*)data + 8, 3 * sizeof(float)); + return SkColorSpace::MakeRGB(transferFn, toXYZ); + } + default: + return nullptr; + } + } else { + return nullptr; + } +} + +bool SkColorSpace::Equals(const SkColorSpace* x, const SkColorSpace* y) { + if (x == y) { + return true; + } + + if (!x || !y) { + return false; + } + + if (x->hash() == y->hash()) { + #if defined(SK_DEBUG) + // Do these floats function equivalently? + // This returns true more often than simple float comparison (NaN vs. NaN) and, + // also returns true more often than simple bitwise comparison (+0 vs. -0) and, + // even returns true more often than those two OR'd together (two different NaNs). + auto equiv = [](float X, float Y) { + return (X==Y) + || (sk_float_isnan(X) && sk_float_isnan(Y)); + }; + + for (int i = 0; i < 7; i++) { + float X = (&x->fTransferFn.g)[i], + Y = (&y->fTransferFn.g)[i]; + SkASSERTF(equiv(X,Y), "Hash collision at tf[%d], !equiv(%g,%g)\n", i, X,Y); + } + for (int r = 0; r < 3; r++) + for (int c = 0; c < 3; c++) { + float X = x->fToXYZD50.vals[r][c], + Y = y->fToXYZD50.vals[r][c]; + SkASSERTF(equiv(X,Y), "Hash collision at toXYZD50[%d][%d], !equiv(%g,%g)\n", r,c, X,Y); + } + #endif + return true; + } + return false; +} diff --git a/gfx/skia/skia/src/core/SkColorSpacePriv.h b/gfx/skia/skia/src/core/SkColorSpacePriv.h new file mode 100644 index 0000000000..cfcb91fc7c --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorSpacePriv.h @@ -0,0 +1,86 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkColorSpacePriv_DEFINED +#define SkColorSpacePriv_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/private/base/SkTemplates.h" +#include "modules/skcms/skcms.h" + +namespace skvm { +class Builder; +struct Color; +struct F32; +struct Uniforms; +} + +// A gamut narrower than sRGB, useful for testing. +static constexpr skcms_Matrix3x3 gNarrow_toXYZD50 = {{ + { 0.190974f, 0.404865f, 0.368380f }, + { 0.114746f, 0.582937f, 0.302318f }, + { 0.032925f, 0.153615f, 0.638669f }, +}}; + +static inline bool color_space_almost_equal(float a, float b) { + return SkTAbs(a - b) < 0.01f; +} + +// Let's use a stricter version for transfer functions. Worst case, these are encoded +// in ICC format, which offers 16-bits of fractional precision. +static inline bool transfer_fn_almost_equal(float a, float b) { + return SkTAbs(a - b) < 0.001f; +} + +static inline bool is_almost_srgb(const skcms_TransferFunction& coeffs) { + return transfer_fn_almost_equal(SkNamedTransferFn::kSRGB.a, coeffs.a) && + transfer_fn_almost_equal(SkNamedTransferFn::kSRGB.b, coeffs.b) && + transfer_fn_almost_equal(SkNamedTransferFn::kSRGB.c, coeffs.c) && + transfer_fn_almost_equal(SkNamedTransferFn::kSRGB.d, coeffs.d) && + transfer_fn_almost_equal(SkNamedTransferFn::kSRGB.e, coeffs.e) && + transfer_fn_almost_equal(SkNamedTransferFn::kSRGB.f, coeffs.f) && + transfer_fn_almost_equal(SkNamedTransferFn::kSRGB.g, coeffs.g); +} + +static inline bool is_almost_2dot2(const skcms_TransferFunction& coeffs) { + return transfer_fn_almost_equal(1.0f, coeffs.a) && + transfer_fn_almost_equal(0.0f, coeffs.b) && + transfer_fn_almost_equal(0.0f, coeffs.e) && + transfer_fn_almost_equal(2.2f, coeffs.g) && + coeffs.d <= 0.0f; +} + +static inline bool is_almost_linear(const skcms_TransferFunction& coeffs) { + // OutputVal = InputVal ^ 1.0f + const bool linearExp = + transfer_fn_almost_equal(1.0f, coeffs.a) && + transfer_fn_almost_equal(0.0f, coeffs.b) && + transfer_fn_almost_equal(0.0f, coeffs.e) && + transfer_fn_almost_equal(1.0f, coeffs.g) && + coeffs.d <= 0.0f; + + // OutputVal = 1.0f * InputVal + const bool linearFn = + transfer_fn_almost_equal(1.0f, coeffs.c) && + transfer_fn_almost_equal(0.0f, coeffs.f) && + coeffs.d >= 1.0f; + + return linearExp || linearFn; +} + +skvm::F32 sk_program_transfer_fn( + skvm::F32 v, skcms_TFType, + skvm::F32 G, skvm::F32 A, skvm::F32 B, skvm::F32 C, skvm::F32 D, skvm::F32 E, skvm::F32 F); + +skvm::Color sk_program_transfer_fn(skvm::Builder*, skvm::Uniforms*, + const skcms_TransferFunction&, skvm::Color); + +// Return raw pointers to commonly used SkColorSpaces. +// No need to ref/unref these, but if you do, do it in pairs. +SkColorSpace* sk_srgb_singleton(); +SkColorSpace* sk_srgb_linear_singleton(); + +#endif // SkColorSpacePriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkColorSpaceXformSteps.cpp b/gfx/skia/skia/src/core/SkColorSpaceXformSteps.cpp new file mode 100644 index 0000000000..de94bc6f86 --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorSpaceXformSteps.cpp @@ -0,0 +1,227 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkColorSpaceXformSteps.h" + +#include "include/core/SkColorSpace.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkFloatingPoint.h" +#include "modules/skcms/skcms.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkVM.h" + +// See skia.org/user/color (== site/user/color.md). + +SkColorSpaceXformSteps::SkColorSpaceXformSteps(const SkColorSpace* src, SkAlphaType srcAT, + const SkColorSpace* dst, SkAlphaType dstAT) { + // Opaque outputs are treated as the same alpha type as the source input. + // TODO: we'd really like to have a good way of explaining why we think this is useful. + if (dstAT == kOpaque_SkAlphaType) { + dstAT = srcAT; + } + + // We have some options about what to do with null src or dst here. + // This pair seems to be the most consistent with legacy expectations. + if (!src) { src = sk_srgb_singleton(); } + if (!dst) { dst = src; } + + if (src->hash() == dst->hash() && srcAT == dstAT) { + SkASSERT(SkColorSpace::Equals(src,dst)); + return; + } + + this->flags.unpremul = srcAT == kPremul_SkAlphaType; + this->flags.linearize = !src->gammaIsLinear(); + this->flags.gamut_transform = src->toXYZD50Hash() != dst->toXYZD50Hash(); + this->flags.encode = !dst->gammaIsLinear(); + this->flags.premul = srcAT != kOpaque_SkAlphaType && dstAT == kPremul_SkAlphaType; + + if (this->flags.gamut_transform) { + skcms_Matrix3x3 src_to_dst; // TODO: switch src_to_dst_matrix to row-major + src->gamutTransformTo(dst, &src_to_dst); + + this->src_to_dst_matrix[0] = src_to_dst.vals[0][0]; + this->src_to_dst_matrix[1] = src_to_dst.vals[1][0]; + this->src_to_dst_matrix[2] = src_to_dst.vals[2][0]; + + this->src_to_dst_matrix[3] = src_to_dst.vals[0][1]; + this->src_to_dst_matrix[4] = src_to_dst.vals[1][1]; + this->src_to_dst_matrix[5] = src_to_dst.vals[2][1]; + + this->src_to_dst_matrix[6] = src_to_dst.vals[0][2]; + this->src_to_dst_matrix[7] = src_to_dst.vals[1][2]; + this->src_to_dst_matrix[8] = src_to_dst.vals[2][2]; + } else { + #ifdef SK_DEBUG + skcms_Matrix3x3 srcM, dstM; + src->toXYZD50(&srcM); + dst->toXYZD50(&dstM); + SkASSERT(0 == memcmp(&srcM, &dstM, 9*sizeof(float)) && "Hash collision"); + #endif + } + + // Fill out all the transfer functions we'll use. + src-> transferFn(&this->srcTF ); + dst->invTransferFn(&this->dstTFInv); + + // If we linearize then immediately reencode with the same transfer function, skip both. + if ( this->flags.linearize && + !this->flags.gamut_transform && + this->flags.encode && + src->transferFnHash() == dst->transferFnHash()) + { + #ifdef SK_DEBUG + skcms_TransferFunction dstTF; + dst->transferFn(&dstTF); + for (int i = 0; i < 7; i++) { + SkASSERT( (&srcTF.g)[i] == (&dstTF.g)[i] && "Hash collision" ); + } + #endif + this->flags.linearize = false; + this->flags.encode = false; + } + + // Skip unpremul...premul if there are no non-linear operations between. + if ( this->flags.unpremul && + !this->flags.linearize && + !this->flags.encode && + this->flags.premul) + { + this->flags.unpremul = false; + this->flags.premul = false; + } +} + +void SkColorSpaceXformSteps::apply(float* rgba) const { + if (flags.unpremul) { + // I don't know why isfinite(x) stopped working on the Chromecast bots... + auto is_finite = [](float x) { return x*0 == 0; }; + + float invA = sk_ieee_float_divide(1.0f, rgba[3]); + invA = is_finite(invA) ? invA : 0; + rgba[0] *= invA; + rgba[1] *= invA; + rgba[2] *= invA; + } + if (flags.linearize) { + rgba[0] = skcms_TransferFunction_eval(&srcTF, rgba[0]); + rgba[1] = skcms_TransferFunction_eval(&srcTF, rgba[1]); + rgba[2] = skcms_TransferFunction_eval(&srcTF, rgba[2]); + } + if (flags.gamut_transform) { + float temp[3] = { rgba[0], rgba[1], rgba[2] }; + for (int i = 0; i < 3; ++i) { + rgba[i] = src_to_dst_matrix[ i] * temp[0] + + src_to_dst_matrix[3 + i] * temp[1] + + src_to_dst_matrix[6 + i] * temp[2]; + } + } + if (flags.encode) { + rgba[0] = skcms_TransferFunction_eval(&dstTFInv, rgba[0]); + rgba[1] = skcms_TransferFunction_eval(&dstTFInv, rgba[1]); + rgba[2] = skcms_TransferFunction_eval(&dstTFInv, rgba[2]); + } + if (flags.premul) { + rgba[0] *= rgba[3]; + rgba[1] *= rgba[3]; + rgba[2] *= rgba[3]; + } +} + +void SkColorSpaceXformSteps::apply(SkRasterPipeline* p) const { + if (flags.unpremul) { p->append(SkRasterPipelineOp::unpremul); } + if (flags.linearize) { p->append_transfer_function(srcTF); } + if (flags.gamut_transform) { p->append(SkRasterPipelineOp::matrix_3x3, &src_to_dst_matrix); } + if (flags.encode) { p->append_transfer_function(dstTFInv); } + if (flags.premul) { p->append(SkRasterPipelineOp::premul); } +} + +skvm::F32 sk_program_transfer_fn( + skvm::F32 v, skcms_TFType tf_type, + skvm::F32 G, skvm::F32 A, skvm::F32 B, skvm::F32 C, skvm::F32 D, skvm::F32 E, skvm::F32 F) +{ + // Strip off the sign bit and save it for later. + skvm::I32 bits = pun_to_I32(v), + sign = bits & 0x80000000; + v = pun_to_F32(bits ^ sign); + + switch (tf_type) { + case skcms_TFType_Invalid: SkASSERT(false); break; + + case skcms_TFType_sRGBish: { + v = select(v <= D, C*v + F + , approx_powf(A*v + B, G) + E); + } break; + + case skcms_TFType_PQish: { + skvm::F32 vC = approx_powf(v, C); + v = approx_powf(max(B * vC + A, 0.0f) / (E * vC + D), F); + } break; + + case skcms_TFType_HLGish: { + skvm::F32 vA = v*A, + K = F + 1.0f; + v = K*select(vA <= 1.0f, approx_powf(vA, B) + , approx_exp((v-E) * C + D)); + } break; + + case skcms_TFType_HLGinvish: { + skvm::F32 K = F + 1.0f; + v /= K; + v = select(v <= 1.0f, A * approx_powf(v, B) + , C * approx_log(v-D) + E); + } break; + } + + // Re-apply the original sign bit on our way out the door. + return pun_to_F32(sign | pun_to_I32(v)); +} + +skvm::Color sk_program_transfer_fn(skvm::Builder* p, skvm::Uniforms* uniforms, + const skcms_TransferFunction& tf, skvm::Color c) { + skvm::F32 G = p->uniformF(uniforms->pushF(tf.g)), + A = p->uniformF(uniforms->pushF(tf.a)), + B = p->uniformF(uniforms->pushF(tf.b)), + C = p->uniformF(uniforms->pushF(tf.c)), + D = p->uniformF(uniforms->pushF(tf.d)), + E = p->uniformF(uniforms->pushF(tf.e)), + F = p->uniformF(uniforms->pushF(tf.f)); + skcms_TFType tf_type = skcms_TransferFunction_getType(&tf); + return { + sk_program_transfer_fn(c.r, tf_type, G,A,B,C,D,E,F), + sk_program_transfer_fn(c.g, tf_type, G,A,B,C,D,E,F), + sk_program_transfer_fn(c.b, tf_type, G,A,B,C,D,E,F), + c.a, + }; +} + +skvm::Color SkColorSpaceXformSteps::program(skvm::Builder* p, skvm::Uniforms* uniforms, + skvm::Color c) const { + if (flags.unpremul) { + c = unpremul(c); + } + if (flags.linearize) { + c = sk_program_transfer_fn(p, uniforms, srcTF, c); + } + if (flags.gamut_transform) { + auto m = [&](int index) { + return p->uniformF(uniforms->pushF(src_to_dst_matrix[index])); + }; + auto R = c.r * m(0) + c.g * m(3) + c.b * m(6), + G = c.r * m(1) + c.g * m(4) + c.b * m(7), + B = c.r * m(2) + c.g * m(5) + c.b * m(8); + c = {R, G, B, c.a}; + } + if (flags.encode) { + c = sk_program_transfer_fn(p, uniforms, dstTFInv, c); + } + if (flags.premul) { + c = premul(c); + } + return c; +} diff --git a/gfx/skia/skia/src/core/SkColorSpaceXformSteps.h b/gfx/skia/skia/src/core/SkColorSpaceXformSteps.h new file mode 100644 index 0000000000..37bc4f9113 --- /dev/null +++ b/gfx/skia/skia/src/core/SkColorSpaceXformSteps.h @@ -0,0 +1,57 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorSpaceXformSteps_DEFINED +#define SkColorSpaceXformSteps_DEFINED + +#include "include/core/SkAlphaType.h" +#include "modules/skcms/skcms.h" +#include "src/core/SkVM.h" +#include + +class SkColorSpace; +class SkRasterPipeline; + +struct SkColorSpaceXformSteps { + + struct Flags { + bool unpremul = false; + bool linearize = false; + bool gamut_transform = false; + bool encode = false; + bool premul = false; + + constexpr uint32_t mask() const { + return (unpremul ? 1 : 0) + | (linearize ? 2 : 0) + | (gamut_transform ? 4 : 0) + | (encode ? 8 : 0) + | (premul ? 16 : 0); + } + }; + + SkColorSpaceXformSteps() {} + SkColorSpaceXformSteps(const SkColorSpace* src, SkAlphaType srcAT, + const SkColorSpace* dst, SkAlphaType dstAT); + + template + SkColorSpaceXformSteps(const S& src, const D& dst) + : SkColorSpaceXformSteps(src.colorSpace(), src.alphaType(), + dst.colorSpace(), dst.alphaType()) {} + + void apply(float rgba[4]) const; + void apply(SkRasterPipeline*) const; + skvm::Color program(skvm::Builder*, skvm::Uniforms*, skvm::Color) const; + + Flags flags; + + skcms_TransferFunction srcTF, // Apply for linearize. + dstTFInv; // Apply for encode. + float src_to_dst_matrix[9]; // Apply this 3x3 column-major matrix for gamut_transform. +}; + +#endif//SkColorSpaceXformSteps_DEFINED diff --git a/gfx/skia/skia/src/core/SkCompressedDataUtils.cpp b/gfx/skia/skia/src/core/SkCompressedDataUtils.cpp new file mode 100644 index 0000000000..8d9be0c874 --- /dev/null +++ b/gfx/skia/skia/src/core/SkCompressedDataUtils.cpp @@ -0,0 +1,306 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkCompressedDataUtils.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorPriv.h" +#include "include/core/SkData.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkMipmap.h" + +#include +#include + +using namespace skia_private; + +struct ETC1Block { + uint32_t fHigh; + uint32_t fLow; +}; + +constexpr uint32_t kFlipBit = 0x1; // set -> T/B sub-blocks; not-set -> L/R sub-blocks +constexpr uint32_t kDiffBit = 0x2; // set -> differential; not-set -> individual + +static inline int extend_4To8bits(int b) { + int c = b & 0xf; + return (c << 4) | c; +} + +static inline int extend_5To8bits(int b) { + int c = b & 0x1f; + return (c << 3) | (c >> 2); +} + +static inline int extend_5plus3To8Bits(int base, int diff) { + static const int kLookup[8] = { 0, 1, 2, 3, -4, -3, -2, -1 }; + + return extend_5To8bits((0x1f & base) + kLookup[0x7 & diff]); +} + +static const int kNumETC1ModifierTables = 8; +static const int kNumETC1PixelIndices = 4; + +// The index of each row in this table is the ETC1 table codeword +// The index of each column in this table is the ETC1 pixel index value +static const int kETC1ModifierTables[kNumETC1ModifierTables][kNumETC1PixelIndices] = { + /* 0 */ { 2, 8, -2, -8 }, + /* 1 */ { 5, 17, -5, -17 }, + /* 2 */ { 9, 29, -9, -29 }, + /* 3 */ { 13, 42, -13, -42 }, + /* 4 */ { 18, 60, -18, -60 }, + /* 5 */ { 24, 80, -24, -80 }, + /* 6 */ { 33, 106, -33, -106 }, + /* 7 */ { 47, 183, -47, -183 } +}; + +static int num_4x4_blocks(int size) { + return ((size + 3) & ~3) >> 2; +} + +// Return which sub-block a given x,y location in the overall 4x4 block belongs to +static int xy_to_subblock_index(int x, int y, bool flip) { + SkASSERT(x >= 0 && x < 4); + SkASSERT(y >= 0 && y < 4); + + if (flip) { + return y < 2 ? 0 : 1; // sub-block 1 is on top of sub-block 2 + } else { + return x < 2 ? 0 : 1; // sub-block 1 is to the left of sub-block 2 + } +} + +struct IColor { + int fR, fG, fB; +}; + +static SkPMColor add_delta_and_clamp(const IColor& col, int delta) { + int r8 = SkTPin(col.fR + delta, 0, 255); + int g8 = SkTPin(col.fG + delta, 0, 255); + int b8 = SkTPin(col.fB + delta, 0, 255); + + return SkPackARGB32(0xFF, r8, g8, b8); +} + +static bool decompress_etc1(SkISize dimensions, const uint8_t* srcData, SkBitmap* dst) { + const ETC1Block* srcBlocks = reinterpret_cast(srcData); + + int numXBlocks = num_4x4_blocks(dimensions.width()); + int numYBlocks = num_4x4_blocks(dimensions.height()); + + for (int y = 0; y < numYBlocks; ++y) { + for (int x = 0; x < numXBlocks; ++x) { + const ETC1Block* curBlock1 = &srcBlocks[y * numXBlocks + x]; + uint32_t high = SkBSwap32(curBlock1->fHigh); + uint32_t low = SkBSwap32(curBlock1->fLow); + + bool flipped = SkToBool(high & kFlipBit); + bool differential = SkToBool(high & kDiffBit); + + IColor colors[2]; + + if (differential) { + colors[0].fR = extend_5To8bits(high >> 27); + colors[1].fR = extend_5plus3To8Bits(high >> 27, high >> 24); + colors[0].fG = extend_5To8bits(high >> 19); + colors[1].fG = extend_5plus3To8Bits(high >> 19, high >> 16); + colors[0].fB = extend_5To8bits(high >> 11); + colors[1].fB = extend_5plus3To8Bits(high >> 11, high >> 8); + } else { + colors[0].fR = extend_4To8bits(high >> 28); + colors[1].fR = extend_4To8bits(high >> 24); + colors[0].fG = extend_4To8bits(high >> 20); + colors[1].fG = extend_4To8bits(high >> 16); + colors[0].fB = extend_4To8bits(high >> 12); + colors[1].fB = extend_4To8bits(high >> 8); + } + + int tableIndex0 = (high >> 5) & 0x7; + int tableIndex1 = (high >> 2) & 0x7; + const int* tables[2] = { + kETC1ModifierTables[tableIndex0], + kETC1ModifierTables[tableIndex1] + }; + + int baseShift = 0; + int offsetX = 4 * x, offsetY = 4 * y; + for (int i = 0; i < 4; ++i, ++baseShift) { + for (int j = 0; j < 4; ++j) { + if (offsetX + j >= dst->width() || offsetY + i >= dst->height()) { + // This can happen for the topmost levels of a mipmap and for + // non-multiple of 4 textures + continue; + } + + int subBlockIndex = xy_to_subblock_index(j, i, flipped); + int pixelIndex = ((low >> (baseShift+(j*4))) & 0x1) | + (low >> (baseShift+(j*4)+15) & 0x2); + + SkASSERT(subBlockIndex == 0 || subBlockIndex == 1); + SkASSERT(pixelIndex >= 0 && pixelIndex < 4); + + int delta = tables[subBlockIndex][pixelIndex]; + *dst->getAddr32(offsetX + j, offsetY + i) = + add_delta_and_clamp(colors[subBlockIndex], delta); + } + } + } + } + + return true; +} + +//------------------------------------------------------------------------------------------------ +struct BC1Block { + uint16_t fColor0; + uint16_t fColor1; + uint32_t fIndices; +}; + +static SkPMColor from565(uint16_t rgb565) { + uint8_t r8 = SkR16ToR32((rgb565 >> 11) & 0x1F); + uint8_t g8 = SkG16ToG32((rgb565 >> 5) & 0x3F); + uint8_t b8 = SkB16ToB32(rgb565 & 0x1F); + + return SkPackARGB32(0xFF, r8, g8, b8); +} + +// return t*col0 + (1-t)*col1 +static SkPMColor lerp(float t, SkPMColor col0, SkPMColor col1) { + SkASSERT(SkGetPackedA32(col0) == 0xFF && SkGetPackedA32(col1) == 0xFF); + + // TODO: given 't' is only either 1/3 or 2/3 this could be done faster + uint8_t r8 = SkScalarRoundToInt(t * SkGetPackedR32(col0) + (1.0f - t) * SkGetPackedR32(col1)); + uint8_t g8 = SkScalarRoundToInt(t * SkGetPackedG32(col0) + (1.0f - t) * SkGetPackedG32(col1)); + uint8_t b8 = SkScalarRoundToInt(t * SkGetPackedB32(col0) + (1.0f - t) * SkGetPackedB32(col1)); + return SkPackARGB32(0xFF, r8, g8, b8); +} + +static bool decompress_bc1(SkISize dimensions, const uint8_t* srcData, + bool isOpaque, SkBitmap* dst) { + const BC1Block* srcBlocks = reinterpret_cast(srcData); + + int numXBlocks = num_4x4_blocks(dimensions.width()); + int numYBlocks = num_4x4_blocks(dimensions.height()); + + SkPMColor colors[4]; + + for (int y = 0; y < numYBlocks; ++y) { + for (int x = 0; x < numXBlocks; ++x) { + const BC1Block* curBlock = &srcBlocks[y * numXBlocks + x]; + + colors[0] = from565(curBlock->fColor0); + colors[1] = from565(curBlock->fColor1); + if (curBlock->fColor0 <= curBlock->fColor1) { // signal for a transparent block + colors[2] = SkPackARGB32( + 0xFF, + (SkGetPackedR32(colors[0]) + SkGetPackedR32(colors[1])) >> 1, + (SkGetPackedG32(colors[0]) + SkGetPackedG32(colors[1])) >> 1, + (SkGetPackedB32(colors[0]) + SkGetPackedB32(colors[1])) >> 1); + // The opacity of the overall texture trumps the per-block transparency + colors[3] = SkPackARGB32(isOpaque ? 0xFF : 0, 0, 0, 0); + } else { + colors[2] = lerp(2.0f/3.0f, colors[0], colors[1]); + colors[3] = lerp(1.0f/3.0f, colors[0], colors[1]); + } + + int shift = 0; + int offsetX = 4 * x, offsetY = 4 * y; + for (int i = 0; i < 4; ++i) { + for (int j = 0; j < 4; ++j, shift += 2) { + if (offsetX + j >= dst->width() || offsetY + i >= dst->height()) { + // This can happen for the topmost levels of a mipmap and for + // non-multiple of 4 textures + continue; + } + + int index = (curBlock->fIndices >> shift) & 0x3; + *dst->getAddr32(offsetX + j, offsetY + i) = colors[index]; + } + } + } + } + + return true; +} + +bool SkDecompress(sk_sp data, + SkISize dimensions, + SkTextureCompressionType compressionType, + SkBitmap* dst) { + using Type = SkTextureCompressionType; + + const uint8_t* bytes = data->bytes(); + switch (compressionType) { + case Type::kNone: return false; + case Type::kETC2_RGB8_UNORM: return decompress_etc1(dimensions, bytes, dst); + case Type::kBC1_RGB8_UNORM: return decompress_bc1(dimensions, bytes, true, dst); + case Type::kBC1_RGBA8_UNORM: return decompress_bc1(dimensions, bytes, false, dst); + } + + SkUNREACHABLE; +} + +size_t SkCompressedDataSize(SkTextureCompressionType type, SkISize dimensions, + TArray* individualMipOffsets, bool mipmapped) { + SkASSERT(!individualMipOffsets || !individualMipOffsets->size()); + + int numMipLevels = 1; + if (mipmapped) { + numMipLevels = SkMipmap::ComputeLevelCount(dimensions.width(), dimensions.height()) + 1; + } + + size_t totalSize = 0; + switch (type) { + case SkTextureCompressionType::kNone: + break; + case SkTextureCompressionType::kETC2_RGB8_UNORM: + case SkTextureCompressionType::kBC1_RGB8_UNORM: + case SkTextureCompressionType::kBC1_RGBA8_UNORM: { + for (int i = 0; i < numMipLevels; ++i) { + int numBlocks = num_4x4_blocks(dimensions.width()) * + num_4x4_blocks(dimensions.height()); + + if (individualMipOffsets) { + individualMipOffsets->push_back(totalSize); + } + + static_assert(sizeof(ETC1Block) == sizeof(BC1Block)); + totalSize += numBlocks * sizeof(ETC1Block); + + dimensions = {std::max(1, dimensions.width()/2), std::max(1, dimensions.height()/2)}; + } + break; + } + } + + return totalSize; +} + +size_t SkCompressedBlockSize(SkTextureCompressionType type) { + switch (type) { + case SkTextureCompressionType::kNone: + return 0; + case SkTextureCompressionType::kETC2_RGB8_UNORM: + return sizeof(ETC1Block); + case SkTextureCompressionType::kBC1_RGB8_UNORM: + case SkTextureCompressionType::kBC1_RGBA8_UNORM: + return sizeof(BC1Block); + } + SkUNREACHABLE; +} + +size_t SkCompressedFormatDataSize(SkTextureCompressionType compressionType, + SkISize dimensions, bool mipmapped) { + return SkCompressedDataSize(compressionType, dimensions, nullptr, mipmapped); +} diff --git a/gfx/skia/skia/src/core/SkCompressedDataUtils.h b/gfx/skia/skia/src/core/SkCompressedDataUtils.h new file mode 100644 index 0000000000..45e8246f23 --- /dev/null +++ b/gfx/skia/skia/src/core/SkCompressedDataUtils.h @@ -0,0 +1,51 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCompressedDataUtils_DEFINED +#define SkCompressedDataUtils_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTextureCompressionType.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTArray.h" + +#include + +class SkBitmap; +class SkData; +struct SkISize; + +static constexpr bool SkTextureCompressionTypeIsOpaque(SkTextureCompressionType compression) { + switch (compression) { + case SkTextureCompressionType::kNone: return true; + case SkTextureCompressionType::kETC2_RGB8_UNORM: return true; + case SkTextureCompressionType::kBC1_RGB8_UNORM: return true; + case SkTextureCompressionType::kBC1_RGBA8_UNORM: return false; + } + + SkUNREACHABLE; +} + +size_t SkCompressedDataSize(SkTextureCompressionType, SkISize baseDimensions, + skia_private::TArray* individualMipOffsets, bool mipmapped); +size_t SkCompressedBlockSize(SkTextureCompressionType type); + +/** + * Returns the data size for the given SkTextureCompressionType + */ +size_t SkCompressedFormatDataSize(SkTextureCompressionType compressionType, + SkISize dimensions, bool mipmapped); + + /* + * This method will decompress the bottommost level in 'data' into 'dst'. + */ +bool SkDecompress(sk_sp data, + SkISize dimensions, + SkTextureCompressionType compressionType, + SkBitmap* dst); + +#endif diff --git a/gfx/skia/skia/src/core/SkContourMeasure.cpp b/gfx/skia/skia/src/core/SkContourMeasure.cpp new file mode 100644 index 0000000000..58ad078266 --- /dev/null +++ b/gfx/skia/skia/src/core/SkContourMeasure.cpp @@ -0,0 +1,673 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkContourMeasure.h" +#include "include/core/SkPath.h" +#include "src/base/SkTSearch.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkPathMeasurePriv.h" +#include "src/core/SkPathPriv.h" + +#define kMaxTValue 0x3FFFFFFF + +constexpr static inline SkScalar tValue2Scalar(int t) { + SkASSERT((unsigned)t <= kMaxTValue); + // 1/kMaxTValue can't be represented as a float, but it's close and the limits work fine. + const SkScalar kMaxTReciprocal = 1.0f / (SkScalar)kMaxTValue; + return t * kMaxTReciprocal; +} + +static_assert(0.0f == tValue2Scalar( 0), "Lower limit should be exact."); +static_assert(1.0f == tValue2Scalar(kMaxTValue), "Upper limit should be exact."); + +SkScalar SkContourMeasure::Segment::getScalarT() const { + return tValue2Scalar(fTValue); +} + +void SkContourMeasure_segTo(const SkPoint pts[], unsigned segType, + SkScalar startT, SkScalar stopT, SkPath* dst) { + SkASSERT(startT >= 0 && startT <= SK_Scalar1); + SkASSERT(stopT >= 0 && stopT <= SK_Scalar1); + SkASSERT(startT <= stopT); + + if (startT == stopT) { + if (!dst->isEmpty()) { + /* if the dash as a zero-length on segment, add a corresponding zero-length line. + The stroke code will add end caps to zero length lines as appropriate */ + SkPoint lastPt; + SkAssertResult(dst->getLastPt(&lastPt)); + dst->lineTo(lastPt); + } + return; + } + + SkPoint tmp0[7], tmp1[7]; + + switch (segType) { + case kLine_SegType: + if (SK_Scalar1 == stopT) { + dst->lineTo(pts[1]); + } else { + dst->lineTo(SkScalarInterp(pts[0].fX, pts[1].fX, stopT), + SkScalarInterp(pts[0].fY, pts[1].fY, stopT)); + } + break; + case kQuad_SegType: + if (0 == startT) { + if (SK_Scalar1 == stopT) { + dst->quadTo(pts[1], pts[2]); + } else { + SkChopQuadAt(pts, tmp0, stopT); + dst->quadTo(tmp0[1], tmp0[2]); + } + } else { + SkChopQuadAt(pts, tmp0, startT); + if (SK_Scalar1 == stopT) { + dst->quadTo(tmp0[3], tmp0[4]); + } else { + SkChopQuadAt(&tmp0[2], tmp1, (stopT - startT) / (1 - startT)); + dst->quadTo(tmp1[1], tmp1[2]); + } + } + break; + case kConic_SegType: { + SkConic conic(pts[0], pts[2], pts[3], pts[1].fX); + + if (0 == startT) { + if (SK_Scalar1 == stopT) { + dst->conicTo(conic.fPts[1], conic.fPts[2], conic.fW); + } else { + SkConic tmp[2]; + if (conic.chopAt(stopT, tmp)) { + dst->conicTo(tmp[0].fPts[1], tmp[0].fPts[2], tmp[0].fW); + } + } + } else { + if (SK_Scalar1 == stopT) { + SkConic tmp[2]; + if (conic.chopAt(startT, tmp)) { + dst->conicTo(tmp[1].fPts[1], tmp[1].fPts[2], tmp[1].fW); + } + } else { + SkConic tmp; + conic.chopAt(startT, stopT, &tmp); + dst->conicTo(tmp.fPts[1], tmp.fPts[2], tmp.fW); + } + } + } break; + case kCubic_SegType: + if (0 == startT) { + if (SK_Scalar1 == stopT) { + dst->cubicTo(pts[1], pts[2], pts[3]); + } else { + SkChopCubicAt(pts, tmp0, stopT); + dst->cubicTo(tmp0[1], tmp0[2], tmp0[3]); + } + } else { + SkChopCubicAt(pts, tmp0, startT); + if (SK_Scalar1 == stopT) { + dst->cubicTo(tmp0[4], tmp0[5], tmp0[6]); + } else { + SkChopCubicAt(&tmp0[3], tmp1, (stopT - startT) / (1 - startT)); + dst->cubicTo(tmp1[1], tmp1[2], tmp1[3]); + } + } + break; + default: + SK_ABORT("unknown segType"); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +static inline int tspan_big_enough(int tspan) { + SkASSERT((unsigned)tspan <= kMaxTValue); + return tspan >> 10; +} + +// can't use tangents, since we need [0..1..................2] to be seen +// as definitely not a line (it is when drawn, but not parametrically) +// so we compare midpoints +#define CHEAP_DIST_LIMIT (SK_Scalar1/2) // just made this value up + +static bool quad_too_curvy(const SkPoint pts[3], SkScalar tolerance) { + // diff = (a/4 + b/2 + c/4) - (a/2 + c/2) + // diff = -a/4 + b/2 - c/4 + SkScalar dx = SkScalarHalf(pts[1].fX) - + SkScalarHalf(SkScalarHalf(pts[0].fX + pts[2].fX)); + SkScalar dy = SkScalarHalf(pts[1].fY) - + SkScalarHalf(SkScalarHalf(pts[0].fY + pts[2].fY)); + + SkScalar dist = std::max(SkScalarAbs(dx), SkScalarAbs(dy)); + return dist > tolerance; +} + +static bool conic_too_curvy(const SkPoint& firstPt, const SkPoint& midTPt, + const SkPoint& lastPt, SkScalar tolerance) { + SkPoint midEnds = firstPt + lastPt; + midEnds *= 0.5f; + SkVector dxy = midTPt - midEnds; + SkScalar dist = std::max(SkScalarAbs(dxy.fX), SkScalarAbs(dxy.fY)); + return dist > tolerance; +} + +static bool cheap_dist_exceeds_limit(const SkPoint& pt, SkScalar x, SkScalar y, + SkScalar tolerance) { + SkScalar dist = std::max(SkScalarAbs(x - pt.fX), SkScalarAbs(y - pt.fY)); + // just made up the 1/2 + return dist > tolerance; +} + +static bool cubic_too_curvy(const SkPoint pts[4], SkScalar tolerance) { + return cheap_dist_exceeds_limit(pts[1], + SkScalarInterp(pts[0].fX, pts[3].fX, SK_Scalar1/3), + SkScalarInterp(pts[0].fY, pts[3].fY, SK_Scalar1/3), tolerance) + || + cheap_dist_exceeds_limit(pts[2], + SkScalarInterp(pts[0].fX, pts[3].fX, SK_Scalar1*2/3), + SkScalarInterp(pts[0].fY, pts[3].fY, SK_Scalar1*2/3), tolerance); +} + +class SkContourMeasureIter::Impl { +public: + Impl(const SkPath& path, bool forceClosed, SkScalar resScale) + : fPath(path) + , fIter(SkPathPriv::Iterate(fPath).begin()) + , fTolerance(CHEAP_DIST_LIMIT * SkScalarInvert(resScale)) + , fForceClosed(forceClosed) {} + + bool hasNextSegments() const { return fIter != SkPathPriv::Iterate(fPath).end(); } + SkContourMeasure* buildSegments(); + +private: + SkPath fPath; + SkPathPriv::RangeIter fIter; + SkScalar fTolerance; + bool fForceClosed; + + // temporary + SkTDArray fSegments; + SkTDArray fPts; // Points used to define the segments + + SkDEBUGCODE(void validate() const;) + SkScalar compute_line_seg(SkPoint p0, SkPoint p1, SkScalar distance, unsigned ptIndex); + SkScalar compute_quad_segs(const SkPoint pts[3], SkScalar distance, + int mint, int maxt, unsigned ptIndex); + SkScalar compute_conic_segs(const SkConic& conic, SkScalar distance, + int mint, const SkPoint& minPt, + int maxt, const SkPoint& maxPt, + unsigned ptIndex); + SkScalar compute_cubic_segs(const SkPoint pts[4], SkScalar distance, + int mint, int maxt, unsigned ptIndex); +}; + +SkScalar SkContourMeasureIter::Impl::compute_quad_segs(const SkPoint pts[3], SkScalar distance, + int mint, int maxt, unsigned ptIndex) { + if (tspan_big_enough(maxt - mint) && quad_too_curvy(pts, fTolerance)) { + SkPoint tmp[5]; + int halft = (mint + maxt) >> 1; + + SkChopQuadAtHalf(pts, tmp); + distance = this->compute_quad_segs(tmp, distance, mint, halft, ptIndex); + distance = this->compute_quad_segs(&tmp[2], distance, halft, maxt, ptIndex); + } else { + SkScalar d = SkPoint::Distance(pts[0], pts[2]); + SkScalar prevD = distance; + distance += d; + if (distance > prevD) { + SkASSERT(ptIndex < (unsigned)fPts.size()); + SkContourMeasure::Segment* seg = fSegments.append(); + seg->fDistance = distance; + seg->fPtIndex = ptIndex; + seg->fType = kQuad_SegType; + seg->fTValue = maxt; + } + } + return distance; +} + +SkScalar SkContourMeasureIter::Impl::compute_conic_segs(const SkConic& conic, SkScalar distance, + int mint, const SkPoint& minPt, + int maxt, const SkPoint& maxPt, + unsigned ptIndex) { + int halft = (mint + maxt) >> 1; + SkPoint halfPt = conic.evalAt(tValue2Scalar(halft)); + if (!halfPt.isFinite()) { + return distance; + } + if (tspan_big_enough(maxt - mint) && conic_too_curvy(minPt, halfPt, maxPt, fTolerance)) { + distance = this->compute_conic_segs(conic, distance, mint, minPt, halft, halfPt, ptIndex); + distance = this->compute_conic_segs(conic, distance, halft, halfPt, maxt, maxPt, ptIndex); + } else { + SkScalar d = SkPoint::Distance(minPt, maxPt); + SkScalar prevD = distance; + distance += d; + if (distance > prevD) { + SkASSERT(ptIndex < (unsigned)fPts.size()); + SkContourMeasure::Segment* seg = fSegments.append(); + seg->fDistance = distance; + seg->fPtIndex = ptIndex; + seg->fType = kConic_SegType; + seg->fTValue = maxt; + } + } + return distance; +} + +SkScalar SkContourMeasureIter::Impl::compute_cubic_segs(const SkPoint pts[4], SkScalar distance, + int mint, int maxt, unsigned ptIndex) { + if (tspan_big_enough(maxt - mint) && cubic_too_curvy(pts, fTolerance)) { + SkPoint tmp[7]; + int halft = (mint + maxt) >> 1; + + SkChopCubicAtHalf(pts, tmp); + distance = this->compute_cubic_segs(tmp, distance, mint, halft, ptIndex); + distance = this->compute_cubic_segs(&tmp[3], distance, halft, maxt, ptIndex); + } else { + SkScalar d = SkPoint::Distance(pts[0], pts[3]); + SkScalar prevD = distance; + distance += d; + if (distance > prevD) { + SkASSERT(ptIndex < (unsigned)fPts.size()); + SkContourMeasure::Segment* seg = fSegments.append(); + seg->fDistance = distance; + seg->fPtIndex = ptIndex; + seg->fType = kCubic_SegType; + seg->fTValue = maxt; + } + } + return distance; +} + +SkScalar SkContourMeasureIter::Impl::compute_line_seg(SkPoint p0, SkPoint p1, SkScalar distance, + unsigned ptIndex) { + SkScalar d = SkPoint::Distance(p0, p1); + SkASSERT(d >= 0); + SkScalar prevD = distance; + distance += d; + if (distance > prevD) { + SkASSERT((unsigned)ptIndex < (unsigned)fPts.size()); + SkContourMeasure::Segment* seg = fSegments.append(); + seg->fDistance = distance; + seg->fPtIndex = ptIndex; + seg->fType = kLine_SegType; + seg->fTValue = kMaxTValue; + } + return distance; +} + +#ifdef SK_DEBUG +void SkContourMeasureIter::Impl::validate() const { +#ifndef SK_DISABLE_SLOW_DEBUG_VALIDATION + const SkContourMeasure::Segment* seg = fSegments.begin(); + const SkContourMeasure::Segment* stop = fSegments.end(); + unsigned ptIndex = 0; + SkScalar distance = 0; + // limit the loop to a reasonable number; pathological cases can run for minutes + int maxChecks = 10000000; // set to INT_MAX to defeat the check + while (seg < stop) { + SkASSERT(seg->fDistance > distance); + SkASSERT(seg->fPtIndex >= ptIndex); + SkASSERT(seg->fTValue > 0); + + const SkContourMeasure::Segment* s = seg; + while (s < stop - 1 && s[0].fPtIndex == s[1].fPtIndex && --maxChecks > 0) { + SkASSERT(s[0].fType == s[1].fType); + SkASSERT(s[0].fTValue < s[1].fTValue); + s += 1; + } + + distance = seg->fDistance; + ptIndex = seg->fPtIndex; + seg += 1; + } +#endif +} +#endif + +SkContourMeasure* SkContourMeasureIter::Impl::buildSegments() { + int ptIndex = -1; + SkScalar distance = 0; + bool haveSeenClose = fForceClosed; + bool haveSeenMoveTo = false; + + /* Note: + * as we accumulate distance, we have to check that the result of += + * actually made it larger, since a very small delta might be > 0, but + * still have no effect on distance (if distance >>> delta). + * + * We do this check below, and in compute_quad_segs and compute_cubic_segs + */ + + fSegments.reset(); + fPts.reset(); + + auto end = SkPathPriv::Iterate(fPath).end(); + for (; fIter != end; ++fIter) { + auto [verb, pts, w] = *fIter; + if (haveSeenMoveTo && verb == SkPathVerb::kMove) { + break; + } + switch (verb) { + case SkPathVerb::kMove: + ptIndex += 1; + fPts.append(1, pts); + SkASSERT(!haveSeenMoveTo); + haveSeenMoveTo = true; + break; + + case SkPathVerb::kLine: { + SkASSERT(haveSeenMoveTo); + SkScalar prevD = distance; + distance = this->compute_line_seg(pts[0], pts[1], distance, ptIndex); + if (distance > prevD) { + fPts.append(1, pts + 1); + ptIndex++; + } + } break; + + case SkPathVerb::kQuad: { + SkASSERT(haveSeenMoveTo); + SkScalar prevD = distance; + distance = this->compute_quad_segs(pts, distance, 0, kMaxTValue, ptIndex); + if (distance > prevD) { + fPts.append(2, pts + 1); + ptIndex += 2; + } + } break; + + case SkPathVerb::kConic: { + SkASSERT(haveSeenMoveTo); + const SkConic conic(pts, *w); + SkScalar prevD = distance; + distance = this->compute_conic_segs(conic, distance, 0, conic.fPts[0], + kMaxTValue, conic.fPts[2], ptIndex); + if (distance > prevD) { + // we store the conic weight in our next point, followed by the last 2 pts + // thus to reconstitue a conic, you'd need to say + // SkConic(pts[0], pts[2], pts[3], weight = pts[1].fX) + fPts.append()->set(conic.fW, 0); + fPts.append(2, pts + 1); + ptIndex += 3; + } + } break; + + case SkPathVerb::kCubic: { + SkASSERT(haveSeenMoveTo); + SkScalar prevD = distance; + distance = this->compute_cubic_segs(pts, distance, 0, kMaxTValue, ptIndex); + if (distance > prevD) { + fPts.append(3, pts + 1); + ptIndex += 3; + } + } break; + + case SkPathVerb::kClose: + haveSeenClose = true; + break; + } + + } + + if (!SkScalarIsFinite(distance)) { + return nullptr; + } + if (fSegments.empty()) { + return nullptr; + } + + if (haveSeenClose) { + SkScalar prevD = distance; + SkPoint firstPt = fPts[0]; + distance = this->compute_line_seg(fPts[ptIndex], firstPt, distance, ptIndex); + if (distance > prevD) { + *fPts.append() = firstPt; + } + } + + SkDEBUGCODE(this->validate();) + + return new SkContourMeasure(std::move(fSegments), std::move(fPts), distance, haveSeenClose); +} + +static void compute_pos_tan(const SkPoint pts[], unsigned segType, + SkScalar t, SkPoint* pos, SkVector* tangent) { + switch (segType) { + case kLine_SegType: + if (pos) { + pos->set(SkScalarInterp(pts[0].fX, pts[1].fX, t), + SkScalarInterp(pts[0].fY, pts[1].fY, t)); + } + if (tangent) { + tangent->setNormalize(pts[1].fX - pts[0].fX, pts[1].fY - pts[0].fY); + } + break; + case kQuad_SegType: + SkEvalQuadAt(pts, t, pos, tangent); + if (tangent) { + tangent->normalize(); + } + break; + case kConic_SegType: { + SkConic(pts[0], pts[2], pts[3], pts[1].fX).evalAt(t, pos, tangent); + if (tangent) { + tangent->normalize(); + } + } break; + case kCubic_SegType: + SkEvalCubicAt(pts, t, pos, tangent, nullptr); + if (tangent) { + tangent->normalize(); + } + break; + default: + SkDEBUGFAIL("unknown segType"); + } +} + + +//////////////////////////////////////////////////////////////////////////////// +//////////////////////////////////////////////////////////////////////////////// + +SkContourMeasureIter::SkContourMeasureIter() { +} + +SkContourMeasureIter::SkContourMeasureIter(const SkPath& path, bool forceClosed, + SkScalar resScale) { + this->reset(path, forceClosed, resScale); +} + +SkContourMeasureIter::~SkContourMeasureIter() {} + +/** Assign a new path, or null to have none. +*/ +void SkContourMeasureIter::reset(const SkPath& path, bool forceClosed, SkScalar resScale) { + if (path.isFinite()) { + fImpl = std::make_unique(path, forceClosed, resScale); + } else { + fImpl.reset(); + } +} + +sk_sp SkContourMeasureIter::next() { + if (!fImpl) { + return nullptr; + } + while (fImpl->hasNextSegments()) { + auto cm = fImpl->buildSegments(); + if (cm) { + return sk_sp(cm); + } + } + return nullptr; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// + +SkContourMeasure::SkContourMeasure(SkTDArray&& segs, SkTDArray&& pts, SkScalar length, bool isClosed) + : fSegments(std::move(segs)) + , fPts(std::move(pts)) + , fLength(length) + , fIsClosed(isClosed) + {} + +template +int SkTKSearch(const T base[], int count, const K& key) { + SkASSERT(count >= 0); + if (count <= 0) { + return ~0; + } + + SkASSERT(base != nullptr); // base may be nullptr if count is zero + + unsigned lo = 0; + unsigned hi = count - 1; + + while (lo < hi) { + unsigned mid = (hi + lo) >> 1; + if (base[mid].fDistance < key) { + lo = mid + 1; + } else { + hi = mid; + } + } + + if (base[hi].fDistance < key) { + hi += 1; + hi = ~hi; + } else if (key < base[hi].fDistance) { + hi = ~hi; + } + return hi; +} + +const SkContourMeasure::Segment* SkContourMeasure::distanceToSegment( SkScalar distance, + SkScalar* t) const { + SkDEBUGCODE(SkScalar length = ) this->length(); + SkASSERT(distance >= 0 && distance <= length); + + const Segment* seg = fSegments.begin(); + int count = fSegments.size(); + + int index = SkTKSearch(seg, count, distance); + // don't care if we hit an exact match or not, so we xor index if it is negative + index ^= (index >> 31); + seg = &seg[index]; + + // now interpolate t-values with the prev segment (if possible) + SkScalar startT = 0, startD = 0; + // check if the prev segment is legal, and references the same set of points + if (index > 0) { + startD = seg[-1].fDistance; + if (seg[-1].fPtIndex == seg->fPtIndex) { + SkASSERT(seg[-1].fType == seg->fType); + startT = seg[-1].getScalarT(); + } + } + + SkASSERT(seg->getScalarT() > startT); + SkASSERT(distance >= startD); + SkASSERT(seg->fDistance > startD); + + *t = startT + (seg->getScalarT() - startT) * (distance - startD) / (seg->fDistance - startD); + return seg; +} + +bool SkContourMeasure::getPosTan(SkScalar distance, SkPoint* pos, SkVector* tangent) const { + if (SkScalarIsNaN(distance)) { + return false; + } + + const SkScalar length = this->length(); + SkASSERT(length > 0 && !fSegments.empty()); + + // pin the distance to a legal range + if (distance < 0) { + distance = 0; + } else if (distance > length) { + distance = length; + } + + SkScalar t; + const Segment* seg = this->distanceToSegment(distance, &t); + if (SkScalarIsNaN(t)) { + return false; + } + + SkASSERT((unsigned)seg->fPtIndex < (unsigned)fPts.size()); + compute_pos_tan(&fPts[seg->fPtIndex], seg->fType, t, pos, tangent); + return true; +} + +bool SkContourMeasure::getMatrix(SkScalar distance, SkMatrix* matrix, MatrixFlags flags) const { + SkPoint position; + SkVector tangent; + + if (this->getPosTan(distance, &position, &tangent)) { + if (matrix) { + if (flags & kGetTangent_MatrixFlag) { + matrix->setSinCos(tangent.fY, tangent.fX, 0, 0); + } else { + matrix->reset(); + } + if (flags & kGetPosition_MatrixFlag) { + matrix->postTranslate(position.fX, position.fY); + } + } + return true; + } + return false; +} + +bool SkContourMeasure::getSegment(SkScalar startD, SkScalar stopD, SkPath* dst, + bool startWithMoveTo) const { + SkASSERT(dst); + + SkScalar length = this->length(); // ensure we have built our segments + + if (startD < 0) { + startD = 0; + } + if (stopD > length) { + stopD = length; + } + if (!(startD <= stopD)) { // catch NaN values as well + return false; + } + if (fSegments.empty()) { + return false; + } + + SkPoint p; + SkScalar startT, stopT; + const Segment* seg = this->distanceToSegment(startD, &startT); + if (!SkScalarIsFinite(startT)) { + return false; + } + const Segment* stopSeg = this->distanceToSegment(stopD, &stopT); + if (!SkScalarIsFinite(stopT)) { + return false; + } + SkASSERT(seg <= stopSeg); + if (startWithMoveTo) { + compute_pos_tan(&fPts[seg->fPtIndex], seg->fType, startT, &p, nullptr); + dst->moveTo(p); + } + + if (seg->fPtIndex == stopSeg->fPtIndex) { + SkContourMeasure_segTo(&fPts[seg->fPtIndex], seg->fType, startT, stopT, dst); + } else { + do { + SkContourMeasure_segTo(&fPts[seg->fPtIndex], seg->fType, startT, SK_Scalar1, dst); + seg = SkContourMeasure::Segment::Next(seg); + startT = 0; + } while (seg->fPtIndex < stopSeg->fPtIndex); + SkContourMeasure_segTo(&fPts[seg->fPtIndex], seg->fType, 0, stopT, dst); + } + + return true; +} diff --git a/gfx/skia/skia/src/core/SkConvertPixels.cpp b/gfx/skia/skia/src/core/SkConvertPixels.cpp new file mode 100644 index 0000000000..1ffdc1d37c --- /dev/null +++ b/gfx/skia/skia/src/core/SkConvertPixels.cpp @@ -0,0 +1,253 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/core/SkConvertPixels.h" + +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkSize.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkHalf.h" +#include "src/base/SkRectMemcpy.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkOpts.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkRasterPipelineOpContexts.h" + +#include +#include +#include + +static bool rect_memcpy(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, + const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRB, + const SkColorSpaceXformSteps& steps) { + // We can copy the pixels when no color type, alpha type, or color space changes. + if (dstInfo.colorType() != srcInfo.colorType()) { + return false; + } + if (dstInfo.colorType() != kAlpha_8_SkColorType + && steps.flags.mask() != 0b00000) { + return false; + } + + SkRectMemcpy(dstPixels, dstRB, + srcPixels, srcRB, dstInfo.minRowBytes(), dstInfo.height()); + return true; +} + +static bool swizzle_or_premul(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, + const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRB, + const SkColorSpaceXformSteps& steps) { + auto is_8888 = [](SkColorType ct) { + return ct == kRGBA_8888_SkColorType || ct == kBGRA_8888_SkColorType; + }; + if (!is_8888(dstInfo.colorType()) || + !is_8888(srcInfo.colorType()) || + steps.flags.linearize || + steps.flags.gamut_transform || + steps.flags.unpremul || + steps.flags.encode) { + return false; + } + + const bool swapRB = dstInfo.colorType() != srcInfo.colorType(); + + void (*fn)(uint32_t*, const uint32_t*, int) = nullptr; + + if (steps.flags.premul) { + fn = swapRB ? SkOpts::RGBA_to_bgrA + : SkOpts::RGBA_to_rgbA; + } else { + // If we're not swizzling, we ought to have used rect_memcpy(). + SkASSERT(swapRB); + fn = SkOpts::RGBA_to_BGRA; + } + + for (int y = 0; y < dstInfo.height(); y++) { + fn((uint32_t*)dstPixels, (const uint32_t*)srcPixels, dstInfo.width()); + dstPixels = SkTAddOffset(dstPixels, dstRB); + srcPixels = SkTAddOffset(srcPixels, srcRB); + } + return true; +} + +static bool convert_to_alpha8(const SkImageInfo& dstInfo, void* vdst, size_t dstRB, + const SkImageInfo& srcInfo, const void* src, size_t srcRB, + const SkColorSpaceXformSteps&) { + if (dstInfo.colorType() != kAlpha_8_SkColorType) { + return false; + } + auto dst = (uint8_t*)vdst; + + switch (srcInfo.colorType()) { + case kUnknown_SkColorType: + case kAlpha_8_SkColorType: { + // Unknown should never happen. + // Alpha8 should have been handled by rect_memcpy(). + SkASSERT(false); + return false; + } + + case kA16_unorm_SkColorType: { + auto src16 = (const uint16_t*) src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = src16[x] >> 8; + } + dst = SkTAddOffset(dst, dstRB); + src16 = SkTAddOffset(src16, srcRB); + } + return true; + } + + case kGray_8_SkColorType: + case kRGB_565_SkColorType: + case kR8G8_unorm_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16_float_SkColorType: + case kRGB_888x_SkColorType: + case kRGB_101010x_SkColorType: + case kBGR_101010x_SkColorType: + case kBGR_101010x_XR_SkColorType: + case kR8_unorm_SkColorType: { + for (int y = 0; y < srcInfo.height(); ++y) { + memset(dst, 0xFF, srcInfo.width()); + dst = SkTAddOffset(dst, dstRB); + } + return true; + } + + case kARGB_4444_SkColorType: { + auto src16 = (const uint16_t*) src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = SkPacked4444ToA32(src16[x]); + } + dst = SkTAddOffset(dst, dstRB); + src16 = SkTAddOffset(src16, srcRB); + } + return true; + } + + case kBGRA_8888_SkColorType: + case kRGBA_8888_SkColorType: + case kSRGBA_8888_SkColorType: { + auto src32 = (const uint32_t*) src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = src32[x] >> 24; + } + dst = SkTAddOffset(dst, dstRB); + src32 = SkTAddOffset(src32, srcRB); + } + return true; + } + + case kRGBA_1010102_SkColorType: + case kBGRA_1010102_SkColorType: { + auto src32 = (const uint32_t*) src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = (src32[x] >> 30) * 0x55; + } + dst = SkTAddOffset(dst, dstRB); + src32 = SkTAddOffset(src32, srcRB); + } + return true; + } + + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: { + auto src64 = (const uint64_t*) src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = (uint8_t) (255.0f * SkHalfToFloat(src64[x] >> 48)); + } + dst = SkTAddOffset(dst, dstRB); + src64 = SkTAddOffset(src64, srcRB); + } + return true; + } + + case kRGBA_F32_SkColorType: { + auto rgba = (const float*)src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = (uint8_t)(255.0f * rgba[4*x+3]); + } + dst = SkTAddOffset(dst, dstRB); + rgba = SkTAddOffset(rgba, srcRB); + } + return true; + } + + case kA16_float_SkColorType: { + auto srcF16 = (const uint16_t*) src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = (uint8_t) (255.0f * SkHalfToFloat(srcF16[x])); + } + dst = SkTAddOffset(dst, dstRB); + srcF16 = SkTAddOffset(srcF16, srcRB); + } + return true; + } + + case kR16G16B16A16_unorm_SkColorType: { + auto src64 = (const uint64_t*) src; + for (int y = 0; y < srcInfo.height(); y++) { + for (int x = 0; x < srcInfo.width(); x++) { + dst[x] = (src64[x] >> 48) >> 8; + } + dst = SkTAddOffset(dst, dstRB); + src64 = SkTAddOffset(src64, srcRB); + } + return true; + } + } + return false; +} + +// Default: Use the pipeline. +static void convert_with_pipeline(const SkImageInfo& dstInfo, void* dstRow, int dstStride, + const SkImageInfo& srcInfo, const void* srcRow, int srcStride, + const SkColorSpaceXformSteps& steps) { + SkRasterPipeline_MemoryCtx src = { (void*)srcRow, srcStride }, + dst = { (void*)dstRow, dstStride }; + + SkRasterPipeline_<256> pipeline; + pipeline.append_load(srcInfo.colorType(), &src); + steps.apply(&pipeline); + pipeline.append_store(dstInfo.colorType(), &dst); + pipeline.run(0,0, srcInfo.width(), srcInfo.height()); +} + +bool SkConvertPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, + const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRB) { + SkASSERT(dstInfo.dimensions() == srcInfo.dimensions()); + SkASSERT(SkImageInfoValidConversion(dstInfo, srcInfo)); + + int srcStride = (int)(srcRB / srcInfo.bytesPerPixel()); + int dstStride = (int)(dstRB / dstInfo.bytesPerPixel()); + if ((size_t)srcStride * srcInfo.bytesPerPixel() != srcRB || + (size_t)dstStride * dstInfo.bytesPerPixel() != dstRB) { + return false; + } + + SkColorSpaceXformSteps steps{srcInfo.colorSpace(), srcInfo.alphaType(), + dstInfo.colorSpace(), dstInfo.alphaType()}; + + for (auto fn : {rect_memcpy, swizzle_or_premul, convert_to_alpha8}) { + if (fn(dstInfo, dstPixels, dstRB, srcInfo, srcPixels, srcRB, steps)) { + return true; + } + } + convert_with_pipeline(dstInfo, dstPixels, dstStride, srcInfo, srcPixels, srcStride, steps); + return true; +} diff --git a/gfx/skia/skia/src/core/SkConvertPixels.h b/gfx/skia/skia/src/core/SkConvertPixels.h new file mode 100644 index 0000000000..fd04535a52 --- /dev/null +++ b/gfx/skia/skia/src/core/SkConvertPixels.h @@ -0,0 +1,21 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkConvertPixels_DEFINED +#define SkConvertPixels_DEFINED + +#include "include/private/base/SkAttributes.h" + +#include + +struct SkImageInfo; + +bool SK_WARN_UNUSED_RESULT SkConvertPixels( + const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, + const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRowBytes); + +#endif diff --git a/gfx/skia/skia/src/core/SkCoreBlitters.h b/gfx/skia/skia/src/core/SkCoreBlitters.h new file mode 100644 index 0000000000..aa658a63bf --- /dev/null +++ b/gfx/skia/skia/src/core/SkCoreBlitters.h @@ -0,0 +1,145 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCoreBlitters_DEFINED +#define SkCoreBlitters_DEFINED + +#include "include/core/SkPaint.h" +#include "src/core/SkBlitRow.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkBlitter_A8.h" +#include "src/core/SkXfermodePriv.h" +#include "src/shaders/SkBitmapProcShader.h" +#include "src/shaders/SkShaderBase.h" + +class SkSurfaceProps; + +class SkRasterBlitter : public SkBlitter { +public: + SkRasterBlitter(const SkPixmap& device) : fDevice(device) {} + +protected: + const SkPixmap fDevice; + +private: + using INHERITED = SkBlitter; +}; + +class SkShaderBlitter : public SkRasterBlitter { +public: + /** + * The storage for shaderContext is owned by the caller, but the object itself is not. + * The blitter only ensures that the storage always holds a live object, but it may + * exchange that object. + */ + SkShaderBlitter(const SkPixmap& device, const SkPaint& paint, + SkShaderBase::Context* shaderContext); + ~SkShaderBlitter() override; + +protected: + uint32_t fShaderFlags; + const SkShader* fShader; + SkShaderBase::Context* fShaderContext; + bool fConstInY; + +private: + // illegal + SkShaderBlitter& operator=(const SkShaderBlitter&); + + using INHERITED = SkRasterBlitter; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkARGB32_Blitter : public SkRasterBlitter { +public: + SkARGB32_Blitter(const SkPixmap& device, const SkPaint& paint); + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitMask(const SkMask&, const SkIRect&) override; + const SkPixmap* justAnOpaqueColor(uint32_t*) override; + void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override; + void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override; + +protected: + SkColor fColor; + SkPMColor fPMColor; + +private: + unsigned fSrcA, fSrcR, fSrcG, fSrcB; + + // illegal + SkARGB32_Blitter& operator=(const SkARGB32_Blitter&); + + using INHERITED = SkRasterBlitter; +}; + +class SkARGB32_Opaque_Blitter : public SkARGB32_Blitter { +public: + SkARGB32_Opaque_Blitter(const SkPixmap& device, const SkPaint& paint) + : INHERITED(device, paint) { SkASSERT(paint.getAlpha() == 0xFF); } + void blitMask(const SkMask&, const SkIRect&) override; + void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override; + void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override; + +private: + using INHERITED = SkARGB32_Blitter; +}; + +class SkARGB32_Black_Blitter : public SkARGB32_Opaque_Blitter { +public: + SkARGB32_Black_Blitter(const SkPixmap& device, const SkPaint& paint) + : INHERITED(device, paint) {} + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override; + void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override; + void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override; + +private: + using INHERITED = SkARGB32_Opaque_Blitter; +}; + +class SkARGB32_Shader_Blitter : public SkShaderBlitter { +public: + SkARGB32_Shader_Blitter(const SkPixmap& device, const SkPaint& paint, + SkShaderBase::Context* shaderContext); + ~SkARGB32_Shader_Blitter() override; + void blitH(int x, int y, int width) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitAntiH(int x, int y, const SkAlpha[], const int16_t[]) override; + void blitMask(const SkMask&, const SkIRect&) override; + +private: + SkXfermode* fXfermode; + SkPMColor* fBuffer; + SkBlitRow::Proc32 fProc32; + SkBlitRow::Proc32 fProc32Blend; + bool fShadeDirectlyIntoDevice; + + // illegal + SkARGB32_Shader_Blitter& operator=(const SkARGB32_Shader_Blitter&); + + using INHERITED = SkShaderBlitter; +}; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap&, + const SkPaint&, + const SkMatrix& ctm, + SkArenaAlloc*, + sk_sp clipShader, + const SkSurfaceProps& props); +// Use this if you've pre-baked a shader pipeline, including modulating with paint alpha. +SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap&, const SkPaint&, + const SkRasterPipeline& shaderPipeline, + bool shader_is_opaque, + SkArenaAlloc*, sk_sp clipShader); + +#endif diff --git a/gfx/skia/skia/src/core/SkCpu.cpp b/gfx/skia/skia/src/core/SkCpu.cpp new file mode 100644 index 0000000000..26afc7038a --- /dev/null +++ b/gfx/skia/skia/src/core/SkCpu.cpp @@ -0,0 +1,161 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/private/base/SkOnce.h" +#include "src/core/SkCpu.h" + +#if defined(SK_CPU_X86) + #if defined(_MSC_VER) + #include + static void cpuid (uint32_t abcd[4]) { __cpuid ((int*)abcd, 1); } + static void cpuid7(uint32_t abcd[4]) { __cpuidex((int*)abcd, 7, 0); } + static uint64_t xgetbv(uint32_t xcr) { return _xgetbv(xcr); } + #else + #include + #if !defined(__cpuid_count) // Old Mac Clang doesn't have this defined. + #define __cpuid_count(eax, ecx, a, b, c, d) \ + __asm__("cpuid" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(eax), "2"(ecx)) + #endif + static void cpuid (uint32_t abcd[4]) { __get_cpuid(1, abcd+0, abcd+1, abcd+2, abcd+3); } + static void cpuid7(uint32_t abcd[4]) { + __cpuid_count(7, 0, abcd[0], abcd[1], abcd[2], abcd[3]); + } + static uint64_t xgetbv(uint32_t xcr) { + uint32_t eax, edx; + __asm__ __volatile__ ( "xgetbv" : "=a"(eax), "=d"(edx) : "c"(xcr)); + return (uint64_t)(edx) << 32 | eax; + } + #endif + + static uint32_t read_cpu_features() { + uint32_t features = 0; + uint32_t abcd[4] = {0,0,0,0}; + + // You might want to refer to http://www.sandpile.org/x86/cpuid.htm + + cpuid(abcd); + if (abcd[3] & (1<<25)) { features |= SkCpu:: SSE1; } + if (abcd[3] & (1<<26)) { features |= SkCpu:: SSE2; } + if (abcd[2] & (1<< 0)) { features |= SkCpu:: SSE3; } + if (abcd[2] & (1<< 9)) { features |= SkCpu::SSSE3; } + if (abcd[2] & (1<<19)) { features |= SkCpu::SSE41; } + if (abcd[2] & (1<<20)) { features |= SkCpu::SSE42; } + + if ((abcd[2] & (3<<26)) == (3<<26) // XSAVE + OSXSAVE + && (xgetbv(0) & (3<<1)) == (3<<1)) { // XMM and YMM state enabled. + if (abcd[2] & (1<<28)) { features |= SkCpu:: AVX; } + if (abcd[2] & (1<<29)) { features |= SkCpu::F16C; } + if (abcd[2] & (1<<12)) { features |= SkCpu:: FMA; } + + cpuid7(abcd); + if (abcd[1] & (1<<5)) { features |= SkCpu::AVX2; } + if (abcd[1] & (1<<3)) { features |= SkCpu::BMI1; } + if (abcd[1] & (1<<8)) { features |= SkCpu::BMI2; } + if (abcd[1] & (1<<9)) { features |= SkCpu::ERMS; } + + if ((xgetbv(0) & (7<<5)) == (7<<5)) { // All ZMM state bits enabled too. + if (abcd[1] & (1<<16)) { features |= SkCpu::AVX512F; } + if (abcd[1] & (1<<17)) { features |= SkCpu::AVX512DQ; } + if (abcd[1] & (1<<21)) { features |= SkCpu::AVX512IFMA; } + if (abcd[1] & (1<<26)) { features |= SkCpu::AVX512PF; } + if (abcd[1] & (1<<27)) { features |= SkCpu::AVX512ER; } + if (abcd[1] & (1<<28)) { features |= SkCpu::AVX512CD; } + if (abcd[1] & (1<<30)) { features |= SkCpu::AVX512BW; } + if (abcd[1] & (1<<31)) { features |= SkCpu::AVX512VL; } + } + } + return features; + } + +#elif defined(SK_CPU_ARM64) && __has_include() + #include + + static uint32_t read_cpu_features() { + const uint32_t kHWCAP_CRC32 = (1<< 7), + kHWCAP_ASIMDHP = (1<<10); + + uint32_t features = 0; + uint32_t hwcaps = getauxval(AT_HWCAP); + if (hwcaps & kHWCAP_CRC32 ) { features |= SkCpu::CRC32; } + if (hwcaps & kHWCAP_ASIMDHP) { features |= SkCpu::ASIMDHP; } + + // The Samsung Mongoose 3 core sets the ASIMDHP bit but doesn't support it. + for (int core = 0; features & SkCpu::ASIMDHP; core++) { + // These /sys files contain the core's MIDR_EL1 register, the source of + // CPU {implementer, variant, part, revision} you'd see in /proc/cpuinfo. + SkString path = + SkStringPrintf("/sys/devices/system/cpu/cpu%d/regs/identification/midr_el1", core); + + // Can't use SkData::MakeFromFileName() here, I think because /sys can't be mmap()'d. + SkFILEStream midr_el1(path.c_str()); + if (!midr_el1.isValid()) { + // This is our ordinary exit path. + // If we ask for MIDR_EL1 from a core that doesn't exist, we've checked all cores. + if (core == 0) { + // On the other hand, if we can't read MIDR_EL1 from any core, assume the worst. + features &= ~(SkCpu::ASIMDHP); + } + break; + } + + const char kMongoose3[] = "0x00000000531f0020"; // 53 == Samsung. + char buf[std::size(kMongoose3) - 1]; // No need for the terminating \0. + + if (std::size(buf) != midr_el1.read(buf, std::size(buf)) + || 0 == memcmp(kMongoose3, buf, std::size(buf))) { + features &= ~(SkCpu::ASIMDHP); + } + } + return features; + } + +#elif defined(SK_CPU_ARM32) && __has_include() && \ + (!defined(__ANDROID_API__) || __ANDROID_API__ >= 18) + // sys/auxv.h will always be present in the Android NDK due to unified + //headers, but getauxval is only defined for API >= 18. + #include + + static uint32_t read_cpu_features() { + const uint32_t kHWCAP_NEON = (1<<12); + const uint32_t kHWCAP_VFPv4 = (1<<16); + + uint32_t features = 0; + uint32_t hwcaps = getauxval(AT_HWCAP); + if (hwcaps & kHWCAP_NEON ) { + features |= SkCpu::NEON; + if (hwcaps & kHWCAP_VFPv4) { features |= SkCpu::NEON_FMA|SkCpu::VFP_FP16; } + } + return features; + } + +#elif defined(SK_CPU_ARM32) && __has_include() + #include + + static uint32_t read_cpu_features() { + uint32_t features = 0; + uint64_t cpu_features = android_getCpuFeatures(); + if (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON) { features |= SkCpu::NEON; } + if (cpu_features & ANDROID_CPU_ARM_FEATURE_NEON_FMA) { features |= SkCpu::NEON_FMA; } + if (cpu_features & ANDROID_CPU_ARM_FEATURE_VFP_FP16) { features |= SkCpu::VFP_FP16; } + return features; + } + +#else + static uint32_t read_cpu_features() { + return 0; + } + +#endif + +uint32_t SkCpu::gCachedFeatures = 0; + +void SkCpu::CacheRuntimeFeatures() { + static SkOnce once; + once([] { gCachedFeatures = read_cpu_features(); }); +} diff --git a/gfx/skia/skia/src/core/SkCpu.h b/gfx/skia/skia/src/core/SkCpu.h new file mode 100644 index 0000000000..2450d93dcb --- /dev/null +++ b/gfx/skia/skia/src/core/SkCpu.h @@ -0,0 +1,121 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCpu_DEFINED +#define SkCpu_DEFINED + +#include "include/core/SkTypes.h" + +struct SkCpu { + enum { + SSE1 = 1 << 0, + SSE2 = 1 << 1, + SSE3 = 1 << 2, + SSSE3 = 1 << 3, + SSE41 = 1 << 4, + SSE42 = 1 << 5, + AVX = 1 << 6, + F16C = 1 << 7, + FMA = 1 << 8, + AVX2 = 1 << 9, + BMI1 = 1 << 10, + BMI2 = 1 << 11, + // Handy alias for all the cool Haswell+ instructions. + HSW = AVX2 | BMI1 | BMI2 | F16C | FMA, + + AVX512F = 1 << 12, + AVX512DQ = 1 << 13, + AVX512IFMA = 1 << 14, + AVX512PF = 1 << 15, + AVX512ER = 1 << 16, + AVX512CD = 1 << 17, + AVX512BW = 1 << 18, + AVX512VL = 1 << 19, + + // Handy alias for all the cool Skylake Xeon+ instructions. + SKX = AVX512F | AVX512DQ | AVX512CD | AVX512BW | AVX512VL, + + ERMS = 1 << 20, + }; + enum { + NEON = 1 << 0, + NEON_FMA = 1 << 1, + VFP_FP16 = 1 << 2, + CRC32 = 1 << 3, + ASIMDHP = 1 << 4, + }; + + static void CacheRuntimeFeatures(); + static bool Supports(uint32_t); +private: + static uint32_t gCachedFeatures; +}; + +inline bool SkCpu::Supports(uint32_t mask) { + uint32_t features = gCachedFeatures; + + // If we mask in compile-time known lower limits, the compiler can + // often compile away this entire function. +#if SK_CPU_X86 + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1 + features |= SSE1; + #endif + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + features |= SSE2; + #endif + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE3 + features |= SSE3; + #endif + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 + features |= SSSE3; + #endif + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41 + features |= SSE41; + #endif + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE42 + features |= SSE42; + #endif + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX + features |= AVX; + #endif + // F16C goes here if we add SK_CPU_SSE_LEVEL_F16C + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + features |= AVX2; + #endif + #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SKX + features |= (AVX512F | AVX512DQ | AVX512CD | AVX512BW | AVX512VL); + #endif + // FMA doesn't fit neatly into this total ordering. + // It's available on Haswell+ just like AVX2, but it's technically a different bit. + // TODO: circle back on this if we find ourselves limited by lack of compile-time FMA + + #if defined(SK_CPU_LIMIT_AVX) + features &= (SSE1 | SSE2 | SSE3 | SSSE3 | SSE41 | SSE42 | AVX); + #elif defined(SK_CPU_LIMIT_SSE41) + features &= (SSE1 | SSE2 | SSE3 | SSSE3 | SSE41); + #elif defined(SK_CPU_LIMIT_SSE2) + features &= (SSE1 | SSE2); + #endif + +#else + #if defined(SK_ARM_HAS_NEON) + features |= NEON; + #endif + + #if defined(SK_CPU_ARM64) + features |= NEON|NEON_FMA|VFP_FP16; + #endif + + #if defined(SK_ARM_HAS_CRC32) + features |= CRC32; + #endif + +#endif + return (features & mask) == mask; +} + +#endif//SkCpu_DEFINED diff --git a/gfx/skia/skia/src/core/SkCubicClipper.cpp b/gfx/skia/skia/src/core/SkCubicClipper.cpp new file mode 100644 index 0000000000..32af6f37df --- /dev/null +++ b/gfx/skia/skia/src/core/SkCubicClipper.cpp @@ -0,0 +1,156 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkCubicClipper.h" + +#include "include/core/SkPoint.h" +#include "src/core/SkGeometry.h" + +#include +#include + +SkCubicClipper::SkCubicClipper() { + fClip.setEmpty(); +} + +void SkCubicClipper::setClip(const SkIRect& clip) { + // conver to scalars, since that's where we'll see the points + fClip.set(clip); +} + + +bool SkCubicClipper::ChopMonoAtY(const SkPoint pts[4], SkScalar y, SkScalar* t) { + SkScalar ycrv[4]; + ycrv[0] = pts[0].fY - y; + ycrv[1] = pts[1].fY - y; + ycrv[2] = pts[2].fY - y; + ycrv[3] = pts[3].fY - y; + +#ifdef NEWTON_RAPHSON // Quadratic convergence, typically <= 3 iterations. + // Initial guess. + // TODO(turk): Check for zero denominator? Shouldn't happen unless the curve + // is not only monotonic but degenerate. + SkScalar t1 = ycrv[0] / (ycrv[0] - ycrv[3]); + + // Newton's iterations. + const SkScalar tol = SK_Scalar1 / 16384; // This leaves 2 fixed noise bits. + SkScalar t0; + const int maxiters = 5; + int iters = 0; + bool converged; + do { + t0 = t1; + SkScalar y01 = SkScalarInterp(ycrv[0], ycrv[1], t0); + SkScalar y12 = SkScalarInterp(ycrv[1], ycrv[2], t0); + SkScalar y23 = SkScalarInterp(ycrv[2], ycrv[3], t0); + SkScalar y012 = SkScalarInterp(y01, y12, t0); + SkScalar y123 = SkScalarInterp(y12, y23, t0); + SkScalar y0123 = SkScalarInterp(y012, y123, t0); + SkScalar yder = (y123 - y012) * 3; + // TODO(turk): check for yder==0: horizontal. + t1 -= y0123 / yder; + converged = SkScalarAbs(t1 - t0) <= tol; // NaN-safe + ++iters; + } while (!converged && (iters < maxiters)); + *t = t1; // Return the result. + + // The result might be valid, even if outside of the range [0, 1], but + // we never evaluate a Bezier outside this interval, so we return false. + if (t1 < 0 || t1 > SK_Scalar1) + return false; // This shouldn't happen, but check anyway. + return converged; + +#else // BISECTION // Linear convergence, typically 16 iterations. + + // Check that the endpoints straddle zero. + SkScalar tNeg, tPos; // Negative and positive function parameters. + if (ycrv[0] < 0) { + if (ycrv[3] < 0) + return false; + tNeg = 0; + tPos = SK_Scalar1; + } else if (ycrv[0] > 0) { + if (ycrv[3] > 0) + return false; + tNeg = SK_Scalar1; + tPos = 0; + } else { + *t = 0; + return true; + } + + const SkScalar tol = SK_Scalar1 / 65536; // 1 for fixed, 1e-5 for float. + do { + SkScalar tMid = (tPos + tNeg) / 2; + SkScalar y01 = SkScalarInterp(ycrv[0], ycrv[1], tMid); + SkScalar y12 = SkScalarInterp(ycrv[1], ycrv[2], tMid); + SkScalar y23 = SkScalarInterp(ycrv[2], ycrv[3], tMid); + SkScalar y012 = SkScalarInterp(y01, y12, tMid); + SkScalar y123 = SkScalarInterp(y12, y23, tMid); + SkScalar y0123 = SkScalarInterp(y012, y123, tMid); + if (y0123 == 0) { + *t = tMid; + return true; + } + if (y0123 < 0) tNeg = tMid; + else tPos = tMid; + } while (!(SkScalarAbs(tPos - tNeg) <= tol)); // Nan-safe + + *t = (tNeg + tPos) / 2; + return true; +#endif // BISECTION +} + + +bool SkCubicClipper::clipCubic(const SkPoint srcPts[4], SkPoint dst[4]) { + bool reverse; + + // we need the data to be monotonically descending in Y + if (srcPts[0].fY > srcPts[3].fY) { + dst[0] = srcPts[3]; + dst[1] = srcPts[2]; + dst[2] = srcPts[1]; + dst[3] = srcPts[0]; + reverse = true; + } else { + memcpy(dst, srcPts, 4 * sizeof(SkPoint)); + reverse = false; + } + + // are we completely above or below + const SkScalar ctop = fClip.fTop; + const SkScalar cbot = fClip.fBottom; + if (dst[3].fY <= ctop || dst[0].fY >= cbot) { + return false; + } + + SkScalar t; + SkPoint tmp[7]; // for SkChopCubicAt + + // are we partially above + if (dst[0].fY < ctop && ChopMonoAtY(dst, ctop, &t)) { + SkChopCubicAt(dst, tmp, t); + dst[0] = tmp[3]; + dst[1] = tmp[4]; + dst[2] = tmp[5]; + } + + // are we partially below + if (dst[3].fY > cbot && ChopMonoAtY(dst, cbot, &t)) { + SkChopCubicAt(dst, tmp, t); + dst[1] = tmp[1]; + dst[2] = tmp[2]; + dst[3] = tmp[3]; + } + + if (reverse) { + using std::swap; + swap(dst[0], dst[3]); + swap(dst[1], dst[2]); + } + return true; +} diff --git a/gfx/skia/skia/src/core/SkCubicClipper.h b/gfx/skia/skia/src/core/SkCubicClipper.h new file mode 100644 index 0000000000..328d63b8b8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkCubicClipper.h @@ -0,0 +1,37 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkCubicClipper_DEFINED +#define SkCubicClipper_DEFINED + +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +struct SkPoint; + +/** This class is initialized with a clip rectangle, and then can be fed cubics, + which must already be monotonic in Y. + + In the future, it might return a series of segments, allowing it to clip + also in X, to ensure that all segments fit in a finite coordinate system. + */ +class SkCubicClipper { +public: + SkCubicClipper(); + + void setClip(const SkIRect& clip); + + bool SK_WARN_UNUSED_RESULT clipCubic(const SkPoint src[4], SkPoint dst[4]); + + static bool SK_WARN_UNUSED_RESULT ChopMonoAtY(const SkPoint pts[4], SkScalar y, SkScalar* t); +private: + SkRect fClip; +}; + +#endif // SkCubicClipper_DEFINED diff --git a/gfx/skia/skia/src/core/SkCubicMap.cpp b/gfx/skia/skia/src/core/SkCubicMap.cpp new file mode 100644 index 0000000000..a76712647d --- /dev/null +++ b/gfx/skia/skia/src/core/SkCubicMap.cpp @@ -0,0 +1,81 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCubicMap.h" + +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTPin.h" +#include "src/base/SkVx.h" +#include "src/core/SkOpts.h" + +#include + +static inline bool nearly_zero(SkScalar x) { + SkASSERT(x >= 0); + return x <= 0.0000000001f; +} + +static float compute_t_from_x(float A, float B, float C, float x) { + return SkOpts::cubic_solver(A, B, C, -x); +} + +float SkCubicMap::computeYFromX(float x) const { + x = SkTPin(x, 0.0f, 1.0f); + + if (nearly_zero(x) || nearly_zero(1 - x)) { + return x; + } + if (fType == kLine_Type) { + return x; + } + float t; + if (fType == kCubeRoot_Type) { + t = sk_float_pow(x / fCoeff[0].fX, 1.0f / 3); + } else { + t = compute_t_from_x(fCoeff[0].fX, fCoeff[1].fX, fCoeff[2].fX, x); + } + float a = fCoeff[0].fY; + float b = fCoeff[1].fY; + float c = fCoeff[2].fY; + float y = ((a * t + b) * t + c) * t; + + return y; +} + +static inline bool coeff_nearly_zero(float delta) { + return sk_float_abs(delta) <= 0.0000001f; +} + +SkCubicMap::SkCubicMap(SkPoint p1, SkPoint p2) { + // Clamp X values only (we allow Ys outside [0..1]). + p1.fX = std::min(std::max(p1.fX, 0.0f), 1.0f); + p2.fX = std::min(std::max(p2.fX, 0.0f), 1.0f); + + auto s1 = skvx::float2::Load(&p1) * 3; + auto s2 = skvx::float2::Load(&p2) * 3; + + (1 + s1 - s2).store(&fCoeff[0]); + (s2 - s1 - s1).store(&fCoeff[1]); + s1.store(&fCoeff[2]); + + fType = kSolver_Type; + if (SkScalarNearlyEqual(p1.fX, p1.fY) && SkScalarNearlyEqual(p2.fX, p2.fY)) { + fType = kLine_Type; + } else if (coeff_nearly_zero(fCoeff[1].fX) && coeff_nearly_zero(fCoeff[2].fX)) { + fType = kCubeRoot_Type; + } +} + +SkPoint SkCubicMap::computeFromT(float t) const { + auto a = skvx::float2::Load(&fCoeff[0]); + auto b = skvx::float2::Load(&fCoeff[1]); + auto c = skvx::float2::Load(&fCoeff[2]); + + SkPoint result; + (((a * t + b) * t + c) * t).store(&result); + return result; +} diff --git a/gfx/skia/skia/src/core/SkCubicSolver.h b/gfx/skia/skia/src/core/SkCubicSolver.h new file mode 100644 index 0000000000..e65f3cc06f --- /dev/null +++ b/gfx/skia/skia/src/core/SkCubicSolver.h @@ -0,0 +1,60 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCubicSolver_DEFINED +#define SkCubicSolver_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkFloatingPoint.h" + +namespace SK_OPTS_NS { + + static float eval_poly(float t, float b) { + return b; + } + + template + static float eval_poly(float t, float m, float b, Rest... rest) { + return eval_poly(t, sk_fmaf(m,t,b), rest...); + } + + inline float cubic_solver(float A, float B, float C, float D) { + + #ifdef SK_DEBUG + auto valid = [](float t) { + return t >= 0 && t <= 1; + }; + #endif + + auto guess_nice_cubic_root = [](float a, float b, float c, float d) { + return -d; + }; + float t = guess_nice_cubic_root(A, B, C, D); + + int iters = 0; + const int MAX_ITERS = 8; + for (; iters < MAX_ITERS; ++iters) { + SkASSERT(valid(t)); + float f = eval_poly(t, A,B,C,D); // f = At^3 + Bt^2 + Ct + D + if (sk_float_abs(f) <= 0.00005f) { + break; + } + float fp = eval_poly(t, 3*A, 2*B, C); // f' = 3At^2 + 2Bt + C + float fpp = eval_poly(t, 3*A+3*A, 2*B); // f'' = 6At + 2B + + float numer = 2 * fp * f; + float denom = sk_fmaf(2*fp, fp, -(f*fpp)); + + t -= numer / denom; + } + + SkASSERT(valid(t)); + return t; + } + +} // namespace SK_OPTS_NS +#endif diff --git a/gfx/skia/skia/src/core/SkData.cpp b/gfx/skia/skia/src/core/SkData.cpp new file mode 100644 index 0000000000..6dd2eb98cc --- /dev/null +++ b/gfx/skia/skia/src/core/SkData.cpp @@ -0,0 +1,219 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkData.h" + +#include "include/core/SkStream.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkOnce.h" +#include "src/core/SkOSFile.h" +#include "src/core/SkStreamPriv.h" + +#include +#include + +SkData::SkData(const void* ptr, size_t size, ReleaseProc proc, void* context) + : fReleaseProc(proc) + , fReleaseProcContext(context) + , fPtr(ptr) + , fSize(size) +{} + +/** This constructor means we are inline with our fPtr's contents. + * Thus we set fPtr to point right after this. + */ +SkData::SkData(size_t size) + : fReleaseProc(nullptr) + , fReleaseProcContext(nullptr) + , fPtr((const char*)(this + 1)) + , fSize(size) +{} + +SkData::~SkData() { + if (fReleaseProc) { + fReleaseProc(fPtr, fReleaseProcContext); + } +} + +bool SkData::equals(const SkData* other) const { + if (this == other) { + return true; + } + if (nullptr == other) { + return false; + } + return fSize == other->fSize && !sk_careful_memcmp(fPtr, other->fPtr, fSize); +} + +size_t SkData::copyRange(size_t offset, size_t length, void* buffer) const { + size_t available = fSize; + if (offset >= available || 0 == length) { + return 0; + } + available -= offset; + if (length > available) { + length = available; + } + SkASSERT(length > 0); + + if (buffer) { + memcpy(buffer, this->bytes() + offset, length); + } + return length; +} + +void SkData::operator delete(void* p) { + ::operator delete(p); +} + +sk_sp SkData::PrivateNewWithCopy(const void* srcOrNull, size_t length) { + if (0 == length) { + return SkData::MakeEmpty(); + } + + const size_t actualLength = length + sizeof(SkData); + SkASSERT_RELEASE(length < actualLength); // Check for overflow. + + void* storage = ::operator new (actualLength); + sk_sp data(new (storage) SkData(length)); + if (srcOrNull) { + memcpy(data->writable_data(), srcOrNull, length); + } + return data; +} + +void SkData::NoopReleaseProc(const void*, void*) {} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkData::MakeEmpty() { + static SkOnce once; + static SkData* empty; + + once([]{ empty = new SkData(nullptr, 0, nullptr, nullptr); }); + return sk_ref_sp(empty); +} + +// assumes fPtr was allocated via sk_malloc +static void sk_free_releaseproc(const void* ptr, void*) { + sk_free((void*)ptr); +} + +sk_sp SkData::MakeFromMalloc(const void* data, size_t length) { + return sk_sp(new SkData(data, length, sk_free_releaseproc, nullptr)); +} + +sk_sp SkData::MakeWithCopy(const void* src, size_t length) { + SkASSERT(src); + return PrivateNewWithCopy(src, length); +} + +sk_sp SkData::MakeUninitialized(size_t length) { + return PrivateNewWithCopy(nullptr, length); +} + +sk_sp SkData::MakeZeroInitialized(size_t length) { + auto data = MakeUninitialized(length); + if (length != 0) { + memset(data->writable_data(), 0, data->size()); + } + return data; +} + +sk_sp SkData::MakeWithProc(const void* ptr, size_t length, ReleaseProc proc, void* ctx) { + return sk_sp(new SkData(ptr, length, proc, ctx)); +} + +// assumes fPtr was allocated with sk_fmmap +static void sk_mmap_releaseproc(const void* addr, void* ctx) { + size_t length = reinterpret_cast(ctx); + sk_fmunmap(addr, length); +} + +sk_sp SkData::MakeFromFILE(FILE* f) { + size_t size; + void* addr = sk_fmmap(f, &size); + if (nullptr == addr) { + return nullptr; + } + + return SkData::MakeWithProc(addr, size, sk_mmap_releaseproc, reinterpret_cast(size)); +} + +sk_sp SkData::MakeFromFileName(const char path[]) { + FILE* f = path ? sk_fopen(path, kRead_SkFILE_Flag) : nullptr; + if (nullptr == f) { + return nullptr; + } + auto data = MakeFromFILE(f); + sk_fclose(f); + return data; +} + +sk_sp SkData::MakeFromFD(int fd) { + size_t size; + void* addr = sk_fdmmap(fd, &size); + if (nullptr == addr) { + return nullptr; + } + return SkData::MakeWithProc(addr, size, sk_mmap_releaseproc, reinterpret_cast(size)); +} + +// assumes context is a SkData +static void sk_dataref_releaseproc(const void*, void* context) { + SkData* src = reinterpret_cast(context); + src->unref(); +} + +sk_sp SkData::MakeSubset(const SkData* src, size_t offset, size_t length) { + /* + We could, if we wanted/need to, just make a deep copy of src's data, + rather than referencing it. This would duplicate the storage (of the + subset amount) but would possibly allow src to go out of scope sooner. + */ + + size_t available = src->size(); + if (offset >= available || 0 == length) { + return SkData::MakeEmpty(); + } + available -= offset; + if (length > available) { + length = available; + } + SkASSERT(length > 0); + + src->ref(); // this will be balanced in sk_dataref_releaseproc + return sk_sp(new SkData(src->bytes() + offset, length, sk_dataref_releaseproc, + const_cast(src))); +} + +sk_sp SkData::MakeWithCString(const char cstr[]) { + size_t size; + if (nullptr == cstr) { + cstr = ""; + size = 1; + } else { + size = strlen(cstr) + 1; + } + return MakeWithCopy(cstr, size); +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkData::MakeFromStream(SkStream* stream, size_t size) { + // reduce the chance of OOM by checking that the stream has enough bytes to read from before + // allocating that potentially large buffer. + if (StreamRemainingLengthIsBelow(stream, size)) { + return nullptr; + } + sk_sp data(SkData::MakeUninitialized(size)); + if (stream->read(data->writable_data(), size) != size) { + return nullptr; + } + return data; +} diff --git a/gfx/skia/skia/src/core/SkDataTable.cpp b/gfx/skia/skia/src/core/SkDataTable.cpp new file mode 100644 index 0000000000..d15e65b473 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDataTable.cpp @@ -0,0 +1,136 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkDataTable.h" + +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkOnce.h" + +#include + +static void malloc_freeproc(void* context) { + sk_free(context); +} + +// Makes empty table +SkDataTable::SkDataTable() { + fCount = 0; + fElemSize = 0; // 0 signals that we use fDir instead of fElems + fU.fDir = nullptr; + fFreeProc = nullptr; + fFreeProcContext = nullptr; +} + +SkDataTable::SkDataTable(const void* array, size_t elemSize, int count, + FreeProc proc, void* context) { + SkASSERT(count > 0); + + fCount = count; + fElemSize = elemSize; // non-zero signals we use fElems instead of fDir + fU.fElems = (const char*)array; + fFreeProc = proc; + fFreeProcContext = context; +} + +SkDataTable::SkDataTable(const Dir* dir, int count, FreeProc proc, void* ctx) { + SkASSERT(count > 0); + + fCount = count; + fElemSize = 0; // 0 signals that we use fDir instead of fElems + fU.fDir = dir; + fFreeProc = proc; + fFreeProcContext = ctx; +} + +SkDataTable::~SkDataTable() { + if (fFreeProc) { + fFreeProc(fFreeProcContext); + } +} + +size_t SkDataTable::atSize(int index) const { + SkASSERT((unsigned)index < (unsigned)fCount); + + if (fElemSize) { + return fElemSize; + } else { + return fU.fDir[index].fSize; + } +} + +const void* SkDataTable::at(int index, size_t* size) const { + SkASSERT((unsigned)index < (unsigned)fCount); + + if (fElemSize) { + if (size) { + *size = fElemSize; + } + return fU.fElems + index * fElemSize; + } else { + if (size) { + *size = fU.fDir[index].fSize; + } + return fU.fDir[index].fPtr; + } +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkDataTable::MakeEmpty() { + static SkDataTable* singleton; + static SkOnce once; + once([]{ singleton = new SkDataTable(); }); + return sk_ref_sp(singleton); +} + +sk_sp SkDataTable::MakeCopyArrays(const void * const * ptrs, + const size_t sizes[], int count) { + if (count <= 0) { + return SkDataTable::MakeEmpty(); + } + + size_t dataSize = 0; + for (int i = 0; i < count; ++i) { + dataSize += sizes[i]; + } + + size_t bufferSize = count * sizeof(Dir) + dataSize; + void* buffer = sk_malloc_throw(bufferSize); + + Dir* dir = (Dir*)buffer; + char* elem = (char*)(dir + count); + for (int i = 0; i < count; ++i) { + dir[i].fPtr = elem; + dir[i].fSize = sizes[i]; + memcpy(elem, ptrs[i], sizes[i]); + elem += sizes[i]; + } + + return sk_sp(new SkDataTable(dir, count, malloc_freeproc, buffer)); +} + +sk_sp SkDataTable::MakeCopyArray(const void* array, size_t elemSize, int count) { + if (count <= 0) { + return SkDataTable::MakeEmpty(); + } + + size_t bufferSize = elemSize * count; + void* buffer = sk_malloc_throw(bufferSize); + memcpy(buffer, array, bufferSize); + + return sk_sp(new SkDataTable(buffer, elemSize, count, malloc_freeproc, buffer)); +} + +sk_sp SkDataTable::MakeArrayProc(const void* array, size_t elemSize, int count, + FreeProc proc, void* ctx) { + if (count <= 0) { + return SkDataTable::MakeEmpty(); + } + return sk_sp(new SkDataTable(array, elemSize, count, proc, ctx)); +} diff --git a/gfx/skia/skia/src/core/SkDebug.cpp b/gfx/skia/skia/src/core/SkDebug.cpp new file mode 100644 index 0000000000..b02ddf7fa9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDebug.cpp @@ -0,0 +1,14 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#if defined(SK_BUILD_FOR_GOOGLE3) +void SkDebugfForDumpStackTrace(const char* data, void* unused) { + SkDebugf("%s", data); +} +#endif diff --git a/gfx/skia/skia/src/core/SkDebugUtils.h b/gfx/skia/skia/src/core/SkDebugUtils.h new file mode 100644 index 0000000000..9333e837d1 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDebugUtils.h @@ -0,0 +1,23 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDebugUtils_DEFINED +#define SkDebugUtils_DEFINED + +#include "include/core/SkTileMode.h" + +static constexpr const char* SkTileModeToStr(SkTileMode tm) { + switch (tm) { + case SkTileMode::kClamp: return "Clamp"; + case SkTileMode::kRepeat: return "Repeat"; + case SkTileMode::kMirror: return "Mirror"; + case SkTileMode::kDecal: return "Decal"; + } + SkUNREACHABLE; +} + +#endif // SkDebugUtils_DEFINED diff --git a/gfx/skia/skia/src/core/SkDeferredDisplayList.cpp b/gfx/skia/skia/src/core/SkDeferredDisplayList.cpp new file mode 100644 index 0000000000..9c9e98cdb6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDeferredDisplayList.cpp @@ -0,0 +1,75 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkDeferredDisplayList.h" + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "src/base/SkArenaAlloc.h" + +#include + +class SkSurfaceCharacterization; + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrRenderTargetProxy.h" +#include "src/gpu/ganesh/GrRenderTask.h" +#endif + +SkDeferredDisplayList::SkDeferredDisplayList(const SkSurfaceCharacterization& characterization, + sk_sp targetProxy, + sk_sp lazyProxyData) + : fCharacterization(characterization) +#if defined(SK_GANESH) + , fArenas(true) + , fTargetProxy(std::move(targetProxy)) + , fLazyProxyData(std::move(lazyProxyData)) +#endif +{ +#if defined(SK_GANESH) + SkASSERT(fTargetProxy->isDDLTarget()); +#endif +} + +SkDeferredDisplayList::~SkDeferredDisplayList() { +#if defined(SK_GANESH) && defined(SK_DEBUG) + for (auto& renderTask : fRenderTasks) { + SkASSERT(renderTask->unique()); + } +#endif +} + +//------------------------------------------------------------------------------------------------- +#if defined(SK_GANESH) + +SkDeferredDisplayList::ProgramIterator::ProgramIterator(GrDirectContext* dContext, + SkDeferredDisplayList* ddl) + : fDContext(dContext) + , fProgramData(ddl->programData()) + , fIndex(0) { +} + +SkDeferredDisplayList::ProgramIterator::~ProgramIterator() {} + +bool SkDeferredDisplayList::ProgramIterator::compile() { + if (!fDContext || fIndex < 0 || fIndex >= (int) fProgramData.size()) { + return false; + } + + return fDContext->priv().compile(fProgramData[fIndex].desc(), fProgramData[fIndex].info()); +} + +bool SkDeferredDisplayList::ProgramIterator::done() const { + return fIndex >= (int) fProgramData.size(); +} + +void SkDeferredDisplayList::ProgramIterator::next() { + ++fIndex; +} + +#endif diff --git a/gfx/skia/skia/src/core/SkDeferredDisplayListPriv.h b/gfx/skia/skia/src/core/SkDeferredDisplayListPriv.h new file mode 100644 index 0000000000..d6321cb7bf --- /dev/null +++ b/gfx/skia/skia/src/core/SkDeferredDisplayListPriv.h @@ -0,0 +1,63 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDeferredDisplayListPriv_DEFINED +#define SkDeferredDisplayListPriv_DEFINED + +#include "include/core/SkDeferredDisplayList.h" + +/*************************************************************************************************/ +/** Class that adds methods to SkDeferredDisplayList that are only intended for use internal to Skia. + This class is purely a privileged window into SkDeferredDisplayList. It should never have + additional data members or virtual methods. */ +class SkDeferredDisplayListPriv { +public: + +#if defined(SK_GANESH) + int numRenderTasks() const { + return fDDL->fRenderTasks.size(); + } + + GrRenderTargetProxy* targetProxy() const { + return fDDL->fTargetProxy.get(); + } + + const SkDeferredDisplayList::LazyProxyData* lazyProxyData() const { + return fDDL->fLazyProxyData.get(); + } + + const skia_private::TArray& programData() const { + return fDDL->programData(); + } + + const skia_private::TArray>& renderTasks() const { + return fDDL->fRenderTasks; + } +#endif + +private: + explicit SkDeferredDisplayListPriv(SkDeferredDisplayList* ddl) : fDDL(ddl) {} + SkDeferredDisplayListPriv& operator=(const SkDeferredDisplayListPriv&) = delete; + + // No taking addresses of this type. + const SkDeferredDisplayListPriv* operator&() const; + SkDeferredDisplayListPriv* operator&(); + + SkDeferredDisplayList* fDDL; + + friend class SkDeferredDisplayList; // to construct/copy this type. +}; + +inline SkDeferredDisplayListPriv SkDeferredDisplayList::priv() { + return SkDeferredDisplayListPriv(this); +} + +inline const SkDeferredDisplayListPriv SkDeferredDisplayList::priv () const { // NOLINT(readability-const-return-type) + return SkDeferredDisplayListPriv(const_cast(this)); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkDeferredDisplayListRecorder.cpp b/gfx/skia/skia/src/core/SkDeferredDisplayListRecorder.cpp new file mode 100644 index 0000000000..91080bd1a3 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDeferredDisplayListRecorder.cpp @@ -0,0 +1,260 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkDeferredDisplayListRecorder.h" + +#include "include/core/SkDeferredDisplayList.h" +#include "include/core/SkSurface.h" +#include "include/core/SkSurfaceCharacterization.h" +#include "src/core/SkMessageBus.h" + +#if !defined(SK_GANESH) +SkDeferredDisplayListRecorder::SkDeferredDisplayListRecorder(const SkSurfaceCharacterization&) {} + +SkDeferredDisplayListRecorder::~SkDeferredDisplayListRecorder() {} + +bool SkDeferredDisplayListRecorder::init() { return false; } + +SkCanvas* SkDeferredDisplayListRecorder::getCanvas() { return nullptr; } + +sk_sp SkDeferredDisplayListRecorder::detach() { return nullptr; } + +#else + +#include "include/core/SkPromiseImageTexture.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrYUVABackendTextures.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrRenderTargetProxy.h" +#include "src/gpu/ganesh/GrTexture.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/image/SkImage_Gpu.h" +#include "src/image/SkImage_GpuYUVA.h" +#include "src/image/SkSurface_Gpu.h" + +SkDeferredDisplayListRecorder::SkDeferredDisplayListRecorder(const SkSurfaceCharacterization& c) + : fCharacterization(c) { + if (fCharacterization.isValid()) { + fContext = GrRecordingContextPriv::MakeDDL(fCharacterization.refContextInfo()); + } +} + +SkDeferredDisplayListRecorder::~SkDeferredDisplayListRecorder() { + if (fContext) { + auto proxyProvider = fContext->priv().proxyProvider(); + + // This allows the uniquely keyed proxies to keep their keys but removes their back + // pointer to the about-to-be-deleted proxy provider. The proxies will use their + // unique key to reattach to cached versions of themselves or to appropriately tag new + // resources (if a cached version was not found). This system operates independent of + // the replaying context's proxy provider (i.e., these uniquely keyed proxies will not + // appear in the replaying proxy providers uniquely keyed proxy map). This should be fine + // since no one else should be trying to reconnect to the orphaned proxies and orphaned + // proxies from different DDLs that share the same key should simply reconnect to the + // same cached resource. + proxyProvider->orphanAllUniqueKeys(); + } +} + +bool SkDeferredDisplayListRecorder::init() { + SkASSERT(fContext); + SkASSERT(!fTargetProxy); + SkASSERT(!fLazyProxyData); + SkASSERT(!fSurface); + + if (!fCharacterization.isValid()) { + return false; + } + + fLazyProxyData = sk_sp( + new SkDeferredDisplayList::LazyProxyData); + + auto proxyProvider = fContext->priv().proxyProvider(); + const GrCaps* caps = fContext->priv().caps(); + + bool usesGLFBO0 = fCharacterization.usesGLFBO0(); + if (usesGLFBO0) { + if (GrBackendApi::kOpenGL != fContext->backend() || + fCharacterization.isTextureable()) { + return false; + } + } + + bool vkRTSupportsInputAttachment = fCharacterization.vkRTSupportsInputAttachment(); + if (vkRTSupportsInputAttachment && GrBackendApi::kVulkan != fContext->backend()) { + return false; + } + + if (fCharacterization.vulkanSecondaryCBCompatible()) { + // Because of the restrictive API allowed for a GrVkSecondaryCBDrawContext, we know ahead + // of time that we don't be able to support certain parameter combinations. Specifically we + // fail on usesGLFBO0 since we can't mix GL and Vulkan. We can't have a texturable object. + // We can't use it as in input attachment since we don't control the render pass this will + // be played into and thus can't force it to have an input attachment and the correct + // dependencies. And finally the GrVkSecondaryCBDrawContext always assumes a top left + // origin. + if (usesGLFBO0 || + vkRTSupportsInputAttachment || + fCharacterization.isTextureable() || + fCharacterization.origin() == kBottomLeft_GrSurfaceOrigin) { + return false; + } + } + + GrColorType grColorType = SkColorTypeToGrColorType(fCharacterization.colorType()); + + // What we're doing here is we're creating a lazy proxy to back the SkSurface. The lazy + // proxy, when instantiated, will use the GrRenderTarget that backs the SkSurface that the + // DDL is being replayed into. + + GrInternalSurfaceFlags surfaceFlags = GrInternalSurfaceFlags::kNone; + if (usesGLFBO0) { + surfaceFlags |= GrInternalSurfaceFlags::kGLRTFBOIDIs0; + } else if (fCharacterization.sampleCount() > 1 && !caps->msaaResolvesAutomatically() && + fCharacterization.isTextureable()) { + surfaceFlags |= GrInternalSurfaceFlags::kRequiresManualMSAAResolve; + } + + if (vkRTSupportsInputAttachment) { + surfaceFlags |= GrInternalSurfaceFlags::kVkRTSupportsInputAttachment; + } + + // FIXME: Why do we use GrMipmapped::kNo instead of SkSurfaceCharacterization::fIsMipMapped? + static constexpr GrProxyProvider::TextureInfo kTextureInfo{GrMipmapped::kNo, + GrTextureType::k2D}; + const GrProxyProvider::TextureInfo* optionalTextureInfo = nullptr; + if (fCharacterization.isTextureable()) { + optionalTextureInfo = &kTextureInfo; + } + + fTargetProxy = proxyProvider->createLazyRenderTargetProxy( + [lazyProxyData = fLazyProxyData](GrResourceProvider* resourceProvider, + const GrSurfaceProxy::LazySurfaceDesc&) { + // The proxy backing the destination surface had better have been instantiated + // prior to this one (i.e., the proxy backing the DDL's surface). + // Fulfill this lazy proxy with the destination surface's GrRenderTarget. + SkASSERT(lazyProxyData->fReplayDest->peekSurface()); + auto surface = sk_ref_sp(lazyProxyData->fReplayDest->peekSurface()); + return GrSurfaceProxy::LazyCallbackResult(std::move(surface)); + }, + fCharacterization.backendFormat(), + fCharacterization.dimensions(), + fCharacterization.sampleCount(), + surfaceFlags, + optionalTextureInfo, + GrMipmapStatus::kNotAllocated, + SkBackingFit::kExact, + skgpu::Budgeted::kYes, + fCharacterization.isProtected(), + fCharacterization.vulkanSecondaryCBCompatible(), + GrSurfaceProxy::UseAllocator::kYes); + + if (!fTargetProxy) { + return false; + } + fTargetProxy->priv().setIsDDLTarget(); + + auto device = fContext->priv().createDevice(grColorType, + fTargetProxy, + fCharacterization.refColorSpace(), + fCharacterization.origin(), + fCharacterization.surfaceProps(), + skgpu::ganesh::Device::InitContents::kUninit); + if (!device) { + return false; + } + + fSurface = sk_make_sp(std::move(device)); + return SkToBool(fSurface.get()); +} + +SkCanvas* SkDeferredDisplayListRecorder::getCanvas() { + if (!fContext) { + return nullptr; + } + + if (!fSurface && !this->init()) { + return nullptr; + } + + return fSurface->getCanvas(); +} + +sk_sp SkDeferredDisplayListRecorder::detach() { + if (!fContext || !fTargetProxy) { + return nullptr; + } + + if (fSurface) { + SkCanvas* canvas = fSurface->getCanvas(); + + canvas->restoreToCount(0); + } + + auto ddl = sk_sp(new SkDeferredDisplayList(fCharacterization, + std::move(fTargetProxy), + std::move(fLazyProxyData))); + + fContext->priv().moveRenderTasksToDDL(ddl.get()); + + // We want a new lazy proxy target for each recorded DDL so force the (lazy proxy-backed) + // SkSurface to be regenerated for each DDL. + fSurface = nullptr; + return ddl; +} + +#ifndef SK_MAKE_PROMISE_TEXTURE_DISABLE_LEGACY_API +sk_sp SkDeferredDisplayListRecorder::makePromiseTexture( + const GrBackendFormat& backendFormat, + int width, + int height, + GrMipmapped mipmapped, + GrSurfaceOrigin origin, + SkColorType colorType, + SkAlphaType alphaType, + sk_sp colorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContext) { + if (!fContext) { + return nullptr; + } + return SkImage::MakePromiseTexture(fContext->threadSafeProxy(), + backendFormat, + {width, height}, + mipmapped, + origin, + colorType, + alphaType, + std::move(colorSpace), + textureFulfillProc, + textureReleaseProc, + textureContext); +} + +sk_sp SkDeferredDisplayListRecorder::makeYUVAPromiseTexture( + const GrYUVABackendTextureInfo& backendTextureInfo, + sk_sp imageColorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContexts[]) { + if (!fContext) { + return nullptr; + } + return SkImage::MakePromiseYUVATexture(fContext->threadSafeProxy(), + backendTextureInfo, + std::move(imageColorSpace), + textureFulfillProc, + textureReleaseProc, + textureContexts); +} +#endif // !SK_MAKE_PROMISE_TEXTURE_DISABLE_LEGACY_API + +#endif diff --git a/gfx/skia/skia/src/core/SkDescriptor.cpp b/gfx/skia/skia/src/core/SkDescriptor.cpp new file mode 100644 index 0000000000..827a635241 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDescriptor.cpp @@ -0,0 +1,231 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkDescriptor.h" + +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" +#include "include/private/chromium/SkChromeRemoteGlyphCache.h" +#include "src/core/SkOpts.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include + +std::unique_ptr SkDescriptor::Alloc(size_t length) { + SkASSERT(length >= sizeof(SkDescriptor) && SkAlign4(length) == length); + void* allocation = ::operator new(length); + return std::unique_ptr(new (allocation) SkDescriptor{}); +} + +void SkDescriptor::operator delete(void* p) { ::operator delete(p); } +void* SkDescriptor::operator new(size_t) { + SK_ABORT("Descriptors are created with placement new."); +} + +void SkDescriptor::flatten(SkWriteBuffer& buffer) const { + buffer.writePad32(static_cast(this), this->fLength); +} + +void* SkDescriptor::addEntry(uint32_t tag, size_t length, const void* data) { + SkASSERT(tag); + SkASSERT(SkAlign4(length) == length); + SkASSERT(this->findEntry(tag, nullptr) == nullptr); + + Entry* entry = (Entry*)((char*)this + fLength); + entry->fTag = tag; + entry->fLen = SkToU32(length); + if (data) { + memcpy(entry + 1, data, length); + } + + fCount += 1; + fLength = SkToU32(fLength + sizeof(Entry) + length); + return (entry + 1); // return its data +} + +void SkDescriptor::computeChecksum() { + fChecksum = SkDescriptor::ComputeChecksum(this); +} + +const void* SkDescriptor::findEntry(uint32_t tag, uint32_t* length) const { + const Entry* entry = (const Entry*)(this + 1); + int count = fCount; + + while (--count >= 0) { + if (entry->fTag == tag) { + if (length) { + *length = entry->fLen; + } + return entry + 1; + } + entry = (const Entry*)((const char*)(entry + 1) + entry->fLen); + } + return nullptr; +} + +std::unique_ptr SkDescriptor::copy() const { + std::unique_ptr desc = SkDescriptor::Alloc(fLength); + memcpy(desc.get(), this, fLength); + return desc; +} + +bool SkDescriptor::operator==(const SkDescriptor& other) const { + // the first value we should look at is the checksum, so this loop + // should terminate early if they descriptors are different. + // NOTE: if we wrote a sentinel value at the end of each, we could + // remove the aa < stop test in the loop... + const uint32_t* aa = (const uint32_t*)this; + const uint32_t* bb = (const uint32_t*)&other; + const uint32_t* stop = (const uint32_t*)((const char*)aa + fLength); + do { + if (*aa++ != *bb++) + return false; + } while (aa < stop); + return true; +} + +SkString SkDescriptor::dumpRec() const { + const SkScalerContextRec* rec = static_cast( + this->findEntry(kRec_SkDescriptorTag, nullptr)); + + SkString result; + result.appendf(" Checksum: %x\n", fChecksum); + if (rec != nullptr) { + result.append(rec->dump()); + } + return result; +} + +uint32_t SkDescriptor::ComputeChecksum(const SkDescriptor* desc) { + const uint32_t* ptr = (const uint32_t*)desc + 1; // skip the checksum field + size_t len = desc->fLength - sizeof(uint32_t); + return SkOpts::hash(ptr, len); +} + +bool SkDescriptor::isValid() const { + uint32_t count = fCount; + size_t lengthRemaining = this->fLength; + if (lengthRemaining < sizeof(SkDescriptor)) { + return false; + } + lengthRemaining -= sizeof(SkDescriptor); + size_t offset = sizeof(SkDescriptor); + + while (lengthRemaining > 0 && count > 0) { + if (lengthRemaining < sizeof(Entry)) { + return false; + } + lengthRemaining -= sizeof(Entry); + + const Entry* entry = (const Entry*)(reinterpret_cast(this) + offset); + + if (lengthRemaining < entry->fLen) { + return false; + } + lengthRemaining -= entry->fLen; + + // rec tags are always a known size. + if (entry->fTag == kRec_SkDescriptorTag && entry->fLen != sizeof(SkScalerContextRec)) { + return false; + } + + offset += sizeof(Entry) + entry->fLen; + count--; + } + return lengthRemaining == 0 && count == 0; +} + +SkAutoDescriptor::SkAutoDescriptor() = default; +SkAutoDescriptor::SkAutoDescriptor(size_t size) { this->reset(size); } +SkAutoDescriptor::SkAutoDescriptor(const SkDescriptor& desc) { this->reset(desc); } +SkAutoDescriptor::SkAutoDescriptor(const SkAutoDescriptor& that) { + this->reset(*that.getDesc()); +} +SkAutoDescriptor& SkAutoDescriptor::operator=(const SkAutoDescriptor& that) { + this->reset(*that.getDesc()); + return *this; +} +SkAutoDescriptor::SkAutoDescriptor(SkAutoDescriptor&& that) { + if (that.fDesc == (SkDescriptor*)&that.fStorage) { + this->reset(*that.getDesc()); + } else { + fDesc = that.fDesc; + that.fDesc = nullptr; + } +} +SkAutoDescriptor& SkAutoDescriptor::operator=(SkAutoDescriptor&& that) { + if (that.fDesc == (SkDescriptor*)&that.fStorage) { + this->reset(*that.getDesc()); + } else { + this->free(); + fDesc = that.fDesc; + that.fDesc = nullptr; + } + return *this; +} + +SkAutoDescriptor::~SkAutoDescriptor() { this->free(); } + +std::optional SkAutoDescriptor::MakeFromBuffer(SkReadBuffer& buffer) { + SkDescriptor descriptorHeader; + if (!buffer.readPad32(&descriptorHeader, sizeof(SkDescriptor))) { return {}; } + + // Basic bounds check on header length to make sure that bodyLength calculation does not + // underflow. + if (descriptorHeader.getLength() < sizeof(SkDescriptor)) { return {}; } + uint32_t bodyLength = descriptorHeader.getLength() - sizeof(SkDescriptor); + + // Make sure the fLength makes sense with respect to the incoming data. + if (bodyLength > buffer.available()) { + return {}; + } + + SkAutoDescriptor ad{descriptorHeader.getLength()}; + memcpy(ad.fDesc, &descriptorHeader, sizeof(SkDescriptor)); + if (!buffer.readPad32(SkTAddOffset(ad.fDesc, sizeof(SkDescriptor)), bodyLength)) { + return {}; + } + +// If the fuzzer produces data but the checksum does not match, let it continue. This will boost +// fuzzing speed. We leave the actual checksum computation in for fuzzing builds to make sure +// the ComputeChecksum function is covered. +#if defined(SK_BUILD_FOR_FUZZER) + SkDescriptor::ComputeChecksum(ad.getDesc()); +#else + if (SkDescriptor::ComputeChecksum(ad.getDesc()) != ad.getDesc()->fChecksum) { return {}; } +#endif + if (!ad.getDesc()->isValid()) { return {}; } + + return {ad}; +} + +void SkAutoDescriptor::reset(size_t size) { + this->free(); + if (size <= sizeof(fStorage)) { + fDesc = new (&fStorage) SkDescriptor{}; + } else { + fDesc = SkDescriptor::Alloc(size).release(); + } +} + +void SkAutoDescriptor::reset(const SkDescriptor& desc) { + size_t size = desc.getLength(); + this->reset(size); + memcpy(fDesc, &desc, size); +} + +void SkAutoDescriptor::free() { + if (fDesc == (SkDescriptor*)&fStorage) { + fDesc->~SkDescriptor(); + } else { + delete fDesc; + } +} + + diff --git a/gfx/skia/skia/src/core/SkDescriptor.h b/gfx/skia/skia/src/core/SkDescriptor.h new file mode 100644 index 0000000000..101ab160ce --- /dev/null +++ b/gfx/skia/skia/src/core/SkDescriptor.h @@ -0,0 +1,112 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDescriptor_DEFINED +#define SkDescriptor_DEFINED + +#include +#include + +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkNoncopyable.h" +#include "src/base/SkBuffer.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkScalerContext.h" + +class SkDescriptor : SkNoncopyable { +public: + static size_t ComputeOverhead(int entryCount) { + SkASSERT(entryCount >= 0); + return sizeof(SkDescriptor) + entryCount * sizeof(Entry); + } + + static std::unique_ptr Alloc(size_t length); + + // + // Ensure the unsized delete is called. + void operator delete(void* p); + void* operator new(size_t); + void* operator new(size_t, void* p) { return p; } + + void flatten(SkWriteBuffer& buffer) const; + + uint32_t getLength() const { return fLength; } + void* addEntry(uint32_t tag, size_t length, const void* data = nullptr); + void computeChecksum(); + + // Assumes that getLength <= capacity of this SkDescriptor. + bool isValid() const; + +#ifdef SK_DEBUG + void assertChecksum() const { + SkASSERT(SkDescriptor::ComputeChecksum(this) == fChecksum); + } +#endif + + const void* findEntry(uint32_t tag, uint32_t* length) const; + + std::unique_ptr copy() const; + + // This assumes that all memory added has a length that is a multiple of 4. This is checked + // by the assert in addEntry. + bool operator==(const SkDescriptor& other) const; + bool operator!=(const SkDescriptor& other) const { return !(*this == other); } + + uint32_t getChecksum() const { return fChecksum; } + + struct Entry { + uint32_t fTag; + uint32_t fLen; + }; + + uint32_t getCount() const { return fCount; } + + SkString dumpRec() const; + +private: + SkDescriptor() = default; + friend class SkDescriptorTestHelper; + friend class SkAutoDescriptor; + + static uint32_t ComputeChecksum(const SkDescriptor* desc); + + uint32_t fChecksum{0}; // must be first + uint32_t fLength{sizeof(SkDescriptor)}; // must be second + uint32_t fCount{0}; +}; + +class SkAutoDescriptor { +public: + SkAutoDescriptor(); + explicit SkAutoDescriptor(size_t size); + explicit SkAutoDescriptor(const SkDescriptor&); + SkAutoDescriptor(const SkAutoDescriptor&); + SkAutoDescriptor& operator=(const SkAutoDescriptor&); + SkAutoDescriptor(SkAutoDescriptor&&); + SkAutoDescriptor& operator=(SkAutoDescriptor&&); + ~SkAutoDescriptor(); + + // Returns no value if there is an error. + static std::optional MakeFromBuffer(SkReadBuffer& buffer); + + void reset(size_t size); + void reset(const SkDescriptor& desc); + SkDescriptor* getDesc() const { SkASSERT(fDesc); return fDesc; } + +private: + void free(); + static constexpr size_t kStorageSize + = sizeof(SkDescriptor) + + sizeof(SkDescriptor::Entry) + sizeof(SkScalerContextRec) // for rec + + sizeof(SkDescriptor::Entry) + sizeof(void*) // for typeface + + 32; // slop for occasional small extras + + SkDescriptor* fDesc{nullptr}; + alignas(uint32_t) char fStorage[kStorageSize]; +}; + +#endif //SkDescriptor_DEFINED diff --git a/gfx/skia/skia/src/core/SkDevice.cpp b/gfx/skia/skia/src/core/SkDevice.cpp new file mode 100644 index 0000000000..cfebd98299 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDevice.cpp @@ -0,0 +1,637 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkDevice.h" + +#include "include/core/SkColorFilter.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkPathMeasure.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkShader.h" +#include "include/core/SkVertices.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkEnumerate.h" +#include "src/core/SkImageFilterCache.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkLatticeIter.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkOpts.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRectPriv.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkTextBlobPriv.h" +#include "src/image/SkImage_Base.h" +#include "src/shaders/SkLocalMatrixShader.h" +#include "src/text/GlyphRun.h" +#include "src/utils/SkPatchUtils.h" +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +SkBaseDevice::SkBaseDevice(const SkImageInfo& info, const SkSurfaceProps& surfaceProps) + : SkMatrixProvider(/* localToDevice = */ SkMatrix::I()) + , fInfo(info) + , fSurfaceProps(surfaceProps) { + fDeviceToGlobal.setIdentity(); + fGlobalToDevice.setIdentity(); +} + +void SkBaseDevice::setDeviceCoordinateSystem(const SkM44& deviceToGlobal, + const SkM44& globalToDevice, + const SkM44& localToDevice, + int bufferOriginX, + int bufferOriginY) { + fDeviceToGlobal = deviceToGlobal; + fDeviceToGlobal.normalizePerspective(); + fGlobalToDevice = globalToDevice; + fGlobalToDevice.normalizePerspective(); + + fLocalToDevice = localToDevice; + fLocalToDevice.normalizePerspective(); + if (bufferOriginX | bufferOriginY) { + fDeviceToGlobal.preTranslate(bufferOriginX, bufferOriginY); + fGlobalToDevice.postTranslate(-bufferOriginX, -bufferOriginY); + fLocalToDevice.postTranslate(-bufferOriginX, -bufferOriginY); + } + fLocalToDevice33 = fLocalToDevice.asM33(); + fLocalToDeviceDirty = true; +} + +void SkBaseDevice::setGlobalCTM(const SkM44& ctm) { + fLocalToDevice = ctm; + fLocalToDevice.normalizePerspective(); + // Map from the global CTM state to this device's coordinate system. + fLocalToDevice.postConcat(fGlobalToDevice); + fLocalToDevice33 = fLocalToDevice.asM33(); + fLocalToDeviceDirty = true; +} + +bool SkBaseDevice::isPixelAlignedToGlobal() const { + // pixelAligned is set to the identity + integer translation of the device-to-global matrix. + // If they are equal then the device is by definition pixel aligned. + SkM44 pixelAligned = SkM44(); + pixelAligned.setRC(0, 3, SkScalarFloorToScalar(fDeviceToGlobal.rc(0, 3))); + pixelAligned.setRC(1, 3, SkScalarFloorToScalar(fDeviceToGlobal.rc(1, 3))); + return pixelAligned == fDeviceToGlobal; +} + +SkIPoint SkBaseDevice::getOrigin() const { + // getOrigin() is deprecated, the old origin has been moved into the fDeviceToGlobal matrix. + // This extracts the origin from the matrix, but asserts that a more complicated coordinate + // space hasn't been set of the device. This function can be removed once existing use cases + // have been updated to use the device-to-global matrix instead or have themselves been removed + // (e.g. Android's device-space clip regions are going away, and are not compatible with the + // generalized device coordinate system). + SkASSERT(this->isPixelAlignedToGlobal()); + return SkIPoint::Make(SkScalarFloorToInt(fDeviceToGlobal.rc(0, 3)), + SkScalarFloorToInt(fDeviceToGlobal.rc(1, 3))); +} + +SkMatrix SkBaseDevice::getRelativeTransform(const SkBaseDevice& dstDevice) const { + // To get the transform from this space to the other device's, transform from our space to + // global and then from global to the other device. + return (dstDevice.fGlobalToDevice * fDeviceToGlobal).asM33(); +} + +static inline bool is_int(float x) { + return x == (float) sk_float_round2int(x); +} + +void SkBaseDevice::drawRegion(const SkRegion& region, const SkPaint& paint) { + const SkMatrix& localToDevice = this->localToDevice(); + bool isNonTranslate = localToDevice.getType() & ~(SkMatrix::kTranslate_Mask); + bool complexPaint = paint.getStyle() != SkPaint::kFill_Style || paint.getMaskFilter() || + paint.getPathEffect(); + bool antiAlias = paint.isAntiAlias() && (!is_int(localToDevice.getTranslateX()) || + !is_int(localToDevice.getTranslateY())); + if (isNonTranslate || complexPaint || antiAlias) { + SkPath path; + region.getBoundaryPath(&path); + path.setIsVolatile(true); + return this->drawPath(path, paint, true); + } + + SkRegion::Iterator it(region); + while (!it.done()) { + this->drawRect(SkRect::Make(it.rect()), paint); + it.next(); + } +} + +void SkBaseDevice::drawArc(const SkRect& oval, SkScalar startAngle, + SkScalar sweepAngle, bool useCenter, const SkPaint& paint) { + SkPath path; + bool isFillNoPathEffect = SkPaint::kFill_Style == paint.getStyle() && !paint.getPathEffect(); + SkPathPriv::CreateDrawArcPath(&path, oval, startAngle, sweepAngle, useCenter, + isFillNoPathEffect); + this->drawPath(path, paint); +} + +void SkBaseDevice::drawDRRect(const SkRRect& outer, + const SkRRect& inner, const SkPaint& paint) { + SkPath path; + path.addRRect(outer); + path.addRRect(inner); + path.setFillType(SkPathFillType::kEvenOdd); + path.setIsVolatile(true); + + this->drawPath(path, paint, true); +} + +void SkBaseDevice::drawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], sk_sp blender, + const SkPaint& paint) { + SkISize lod = SkPatchUtils::GetLevelOfDetail(cubics, &this->localToDevice()); + auto vertices = SkPatchUtils::MakeVertices(cubics, colors, texCoords, lod.width(), lod.height(), + this->imageInfo().colorSpace()); + if (vertices) { + this->drawVertices(vertices.get(), std::move(blender), paint); + } +} + +void SkBaseDevice::drawImageLattice(const SkImage* image, const SkCanvas::Lattice& lattice, + const SkRect& dst, SkFilterMode filter, const SkPaint& paint) { + SkLatticeIter iter(lattice, dst); + + SkRect srcR, dstR; + SkColor c; + bool isFixedColor = false; + const SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType); + + while (iter.next(&srcR, &dstR, &isFixedColor, &c)) { + // TODO: support this fast-path for GPU images + if (isFixedColor || (srcR.width() <= 1.0f && srcR.height() <= 1.0f && + image->readPixels(nullptr, info, &c, 4, srcR.fLeft, srcR.fTop))) { + // Fast draw with drawRect, if this is a patch containing a single color + // or if this is a patch containing a single pixel. + if (0 != c || !paint.isSrcOver()) { + SkPaint paintCopy(paint); + int alpha = SkAlphaMul(SkColorGetA(c), SkAlpha255To256(paint.getAlpha())); + paintCopy.setColor(SkColorSetA(c, alpha)); + this->drawRect(dstR, paintCopy); + } + } else { + this->drawImageRect(image, &srcR, dstR, SkSamplingOptions(filter), paint, + SkCanvas::kStrict_SrcRectConstraint); + } + } +} + +static SkPoint* quad_to_tris(SkPoint tris[6], const SkPoint quad[4]) { + tris[0] = quad[0]; + tris[1] = quad[1]; + tris[2] = quad[2]; + + tris[3] = quad[0]; + tris[4] = quad[2]; + tris[5] = quad[3]; + + return tris + 6; +} + +void SkBaseDevice::drawAtlas(const SkRSXform xform[], + const SkRect tex[], + const SkColor colors[], + int quadCount, + sk_sp blender, + const SkPaint& paint) { + const int triCount = quadCount << 1; + const int vertexCount = triCount * 3; + uint32_t flags = SkVertices::kHasTexCoords_BuilderFlag; + if (colors) { + flags |= SkVertices::kHasColors_BuilderFlag; + } + SkVertices::Builder builder(SkVertices::kTriangles_VertexMode, vertexCount, 0, flags); + + SkPoint* vPos = builder.positions(); + SkPoint* vTex = builder.texCoords(); + SkColor* vCol = builder.colors(); + for (int i = 0; i < quadCount; ++i) { + SkPoint tmp[4]; + xform[i].toQuad(tex[i].width(), tex[i].height(), tmp); + vPos = quad_to_tris(vPos, tmp); + + tex[i].toQuad(tmp); + vTex = quad_to_tris(vTex, tmp); + + if (colors) { + SkOpts::memset32(vCol, colors[i], 6); + vCol += 6; + } + } + this->drawVertices(builder.detach().get(), std::move(blender), paint); +} + +void SkBaseDevice::drawEdgeAAQuad(const SkRect& r, const SkPoint clip[4], SkCanvas::QuadAAFlags aa, + const SkColor4f& color, SkBlendMode mode) { + SkPaint paint; + paint.setColor4f(color); + paint.setBlendMode(mode); + paint.setAntiAlias(aa == SkCanvas::kAll_QuadAAFlags); + + if (clip) { + // Draw the clip directly as a quad since it's a filled color with no local coords + SkPath clipPath; + clipPath.addPoly(clip, 4, true); + this->drawPath(clipPath, paint); + } else { + this->drawRect(r, paint); + } +} + +void SkBaseDevice::drawEdgeAAImageSet(const SkCanvas::ImageSetEntry images[], int count, + const SkPoint dstClips[], const SkMatrix preViewMatrices[], + const SkSamplingOptions& sampling, const SkPaint& paint, + SkCanvas::SrcRectConstraint constraint) { + SkASSERT(paint.getStyle() == SkPaint::kFill_Style); + SkASSERT(!paint.getPathEffect()); + + SkPaint entryPaint = paint; + const SkM44 baseLocalToDevice = this->localToDevice44(); + int clipIndex = 0; + for (int i = 0; i < count; ++i) { + // TODO: Handle per-edge AA. Right now this mirrors the SkiaRenderer component of Chrome + // which turns off antialiasing unless all four edges should be antialiased. This avoids + // seaming in tiled composited layers. + entryPaint.setAntiAlias(images[i].fAAFlags == SkCanvas::kAll_QuadAAFlags); + entryPaint.setAlphaf(paint.getAlphaf() * images[i].fAlpha); + + bool needsRestore = false; + SkASSERT(images[i].fMatrixIndex < 0 || preViewMatrices); + if (images[i].fMatrixIndex >= 0) { + this->save(); + this->setLocalToDevice(baseLocalToDevice * + SkM44(preViewMatrices[images[i].fMatrixIndex])); + needsRestore = true; + } + + SkASSERT(!images[i].fHasClip || dstClips); + if (images[i].fHasClip) { + // Since drawImageRect requires a srcRect, the dst clip is implemented as a true clip + if (!needsRestore) { + this->save(); + needsRestore = true; + } + SkPath clipPath; + clipPath.addPoly(dstClips + clipIndex, 4, true); + this->clipPath(clipPath, SkClipOp::kIntersect, entryPaint.isAntiAlias()); + clipIndex += 4; + } + this->drawImageRect(images[i].fImage.get(), &images[i].fSrcRect, images[i].fDstRect, + sampling, entryPaint, constraint); + if (needsRestore) { + this->restoreLocal(baseLocalToDevice); + } + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkBaseDevice::drawDrawable(SkCanvas* canvas, SkDrawable* drawable, const SkMatrix* matrix) { + drawable->draw(canvas, matrix); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkBaseDevice::drawSpecial(SkSpecialImage*, const SkMatrix&, const SkSamplingOptions&, + const SkPaint&) {} +sk_sp SkBaseDevice::makeSpecial(const SkBitmap&) { return nullptr; } +sk_sp SkBaseDevice::makeSpecial(const SkImage*) { return nullptr; } +sk_sp SkBaseDevice::snapSpecial(const SkIRect&, bool forceCopy) { return nullptr; } +sk_sp SkBaseDevice::snapSpecialScaled(const SkIRect& subset, + const SkISize& dstDims) { + return nullptr; +} +sk_sp SkBaseDevice::snapSpecial() { + return this->snapSpecial(SkIRect::MakeWH(this->width(), this->height())); +} + +void SkBaseDevice::drawDevice(SkBaseDevice* device, const SkSamplingOptions& sampling, + const SkPaint& paint) { + sk_sp deviceImage = device->snapSpecial(); + if (deviceImage) { + this->drawSpecial(deviceImage.get(), device->getRelativeTransform(*this), sampling, paint); + } +} + +void SkBaseDevice::drawFilteredImage(const skif::Mapping& mapping, + SkSpecialImage* src, + SkColorType colorType, + const SkImageFilter* filter, + const SkSamplingOptions& sampling, + const SkPaint& paint) { + SkASSERT(!paint.getImageFilter() && !paint.getMaskFilter()); + + skif::LayerSpace targetOutput = mapping.deviceToLayer( + skif::DeviceSpace(this->devClipBounds())); + + if (colorType == kUnknown_SkColorType) { + colorType = kRGBA_8888_SkColorType; + } + + // getImageFilterCache returns a bare image filter cache pointer that must be ref'ed until the + // filter's filterImage(ctx) function returns. + sk_sp cache(this->getImageFilterCache()); + skif::Context ctx(mapping, targetOutput, cache.get(), colorType, this->imageInfo().colorSpace(), + skif::FilterResult(sk_ref_sp(src))); + + SkIPoint offset; + sk_sp result = as_IFB(filter)->filterImage(ctx).imageAndOffset(&offset); + if (result) { + SkMatrix deviceMatrixWithOffset = mapping.layerToDevice(); + deviceMatrixWithOffset.preTranslate(offset.fX, offset.fY); + this->drawSpecial(result.get(), deviceMatrixWithOffset, sampling, paint); + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkBaseDevice::readPixels(const SkPixmap& pm, int x, int y) { + return this->onReadPixels(pm, x, y); +} + +bool SkBaseDevice::writePixels(const SkPixmap& pm, int x, int y) { + return this->onWritePixels(pm, x, y); +} + +bool SkBaseDevice::onWritePixels(const SkPixmap&, int, int) { + return false; +} + +bool SkBaseDevice::onReadPixels(const SkPixmap&, int x, int y) { + return false; +} + +bool SkBaseDevice::accessPixels(SkPixmap* pmap) { + SkPixmap tempStorage; + if (nullptr == pmap) { + pmap = &tempStorage; + } + return this->onAccessPixels(pmap); +} + +bool SkBaseDevice::peekPixels(SkPixmap* pmap) { + SkPixmap tempStorage; + if (nullptr == pmap) { + pmap = &tempStorage; + } + return this->onPeekPixels(pmap); +} + +////////////////////////////////////////////////////////////////////////////////////////// + +#include "src/base/SkUtils.h" + +static sk_sp make_post_inverse_lm(const SkShader* shader, const SkMatrix& lm) { + SkMatrix inverse_lm; + if (!shader || !lm.invert(&inverse_lm)) { + return nullptr; + } + +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) // b/256873449 + // Legacy impl for old concat order. This does not work for arbitrary shader DAGs (when there is + // no single leaf local matrix). + + // LMs pre-compose. In order to push a post local matrix, we peel off any existing local matrix + // and set a new local matrix of inverse_lm * prev_local_matrix. + SkMatrix prev_local_matrix; + const auto nested_shader = as_SB(shader)->makeAsALocalMatrixShader(&prev_local_matrix); + if (nested_shader) { + // unfurl the shader + shader = nested_shader.get(); + } + + return shader->makeWithLocalMatrix(inverse_lm * prev_local_matrix); +#endif + + return shader->makeWithLocalMatrix(inverse_lm); +} + +void SkBaseDevice::drawGlyphRunList(SkCanvas* canvas, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) { + if (!this->localToDevice().isFinite()) { + return; + } + + if (!glyphRunList.hasRSXForm()) { + this->onDrawGlyphRunList(canvas, glyphRunList, initialPaint, drawingPaint); + } else { + this->simplifyGlyphRunRSXFormAndRedraw(canvas, glyphRunList, initialPaint, drawingPaint); + } +} + +void SkBaseDevice::simplifyGlyphRunRSXFormAndRedraw(SkCanvas* canvas, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) { + for (const sktext::GlyphRun& run : glyphRunList) { + if (run.scaledRotations().empty()) { + auto subList = glyphRunList.builder()->makeGlyphRunList( + run, drawingPaint, {0, 0}); + this->drawGlyphRunList(canvas, subList, initialPaint, drawingPaint); + } else { + SkPoint origin = glyphRunList.origin(); + SkPoint sharedPos{0, 0}; // we're at the origin + SkGlyphID sharedGlyphID; + sktext::GlyphRun glyphRun { + run.font(), + SkSpan{&sharedPos, 1}, + SkSpan{&sharedGlyphID, 1}, + SkSpan{}, + SkSpan{}, + SkSpan{} + }; + + for (auto [i, glyphID, pos] : SkMakeEnumerate(run.source())) { + sharedGlyphID = glyphID; + auto [scos, ssin] = run.scaledRotations()[i]; + SkRSXform rsxForm = SkRSXform::Make(scos, ssin, pos.x(), pos.y()); + SkMatrix glyphToLocal; + glyphToLocal.setRSXform(rsxForm).postTranslate(origin.x(), origin.y()); + + // We want to rotate each glyph by the rsxform, but we don't want to rotate "space" + // (i.e. the shader that cares about the ctm) so we have to undo our little ctm + // trick with a localmatrixshader so that the shader draws as if there was no + // change to the ctm. + SkPaint invertingPaint{drawingPaint}; + invertingPaint.setShader( + make_post_inverse_lm(drawingPaint.getShader(), glyphToLocal)); + SkAutoCanvasRestore acr(canvas, true); + canvas->concat(SkM44(glyphToLocal)); + sktext::GlyphRunList subList = glyphRunList.builder()->makeGlyphRunList( + glyphRun, drawingPaint, {0, 0}); + this->drawGlyphRunList(canvas, subList, initialPaint, invertingPaint); + } + } + } +} + +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) +sk_sp SkBaseDevice::convertGlyphRunListToSlug( + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) { + return nullptr; +} + +void SkBaseDevice::drawSlug(SkCanvas*, const sktext::gpu::Slug*, const SkPaint&) { + SK_ABORT("Slug drawing not supported."); +} +#endif + +////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkBaseDevice::makeSurface(SkImageInfo const&, SkSurfaceProps const&) { + return nullptr; +} + +SkScalerContextFlags SkBaseDevice::scalerContextFlags() const { + // If we're doing linear blending, then we can disable the gamma hacks. + // Otherwise, leave them on. In either case, we still want the contrast boost: + // TODO: Can we be even smarter about mask gamma based on the dest transfer function? + const SkColorSpace* const cs = fInfo.colorSpace(); + if (cs && cs->gammaIsLinear()) { + return SkScalerContextFlags::kBoostContrast; + } else { + return SkScalerContextFlags::kFakeGammaAndBoostContrast; + } +} + +////////////////////////////////////////////////////////////////////////////////////////// + +SkNoPixelsDevice::SkNoPixelsDevice(const SkIRect& bounds, const SkSurfaceProps& props) + : SkNoPixelsDevice(bounds, props, nullptr) {} + +SkNoPixelsDevice::SkNoPixelsDevice(const SkIRect& bounds, const SkSurfaceProps& props, + sk_sp colorSpace) + : SkBaseDevice(SkImageInfo::Make(bounds.size(), kUnknown_SkColorType, kUnknown_SkAlphaType, + std::move(colorSpace)), props) { + // this fails if we enable this assert: DiscardableImageMapTest.GetDiscardableImagesInRectMaxImage + //SkASSERT(bounds.width() >= 0 && bounds.height() >= 0); + + this->setOrigin(SkM44(), bounds.left(), bounds.top()); + this->resetClipStack(); +} + +void SkNoPixelsDevice::onSave() { + SkASSERT(!fClipStack.empty()); + fClipStack.back().fDeferredSaveCount++; +} + +void SkNoPixelsDevice::onRestore() { + SkASSERT(!fClipStack.empty()); + if (fClipStack.back().fDeferredSaveCount > 0) { + fClipStack.back().fDeferredSaveCount--; + } else { + fClipStack.pop_back(); + SkASSERT(!fClipStack.empty()); + } +} + +SkNoPixelsDevice::ClipState& SkNoPixelsDevice::writableClip() { + SkASSERT(!fClipStack.empty()); + ClipState& current = fClipStack.back(); + if (current.fDeferredSaveCount > 0) { + current.fDeferredSaveCount--; + // Stash current state in case 'current' moves during a resize + SkIRect bounds = current.fClipBounds; + bool aa = current.fIsAA; + bool rect = current.fIsRect; + return fClipStack.emplace_back(bounds, aa, rect); + } else { + return current; + } +} + +void SkNoPixelsDevice::onClipRect(const SkRect& rect, SkClipOp op, bool aa) { + this->writableClip().op(op, this->localToDevice44(), rect, + aa, /*fillsBounds=*/true); +} + +void SkNoPixelsDevice::onClipRRect(const SkRRect& rrect, SkClipOp op, bool aa) { + this->writableClip().op(op, this->localToDevice44(), rrect.getBounds(), + aa, /*fillsBounds=*/rrect.isRect()); +} + +void SkNoPixelsDevice::onClipPath(const SkPath& path, SkClipOp op, bool aa) { + // Toggle op if the path is inverse filled + if (path.isInverseFillType()) { + op = (op == SkClipOp::kDifference ? SkClipOp::kIntersect : SkClipOp::kDifference); + } + this->writableClip().op(op, this->localToDevice44(), path.getBounds(), + aa, /*fillsBounds=*/false); +} + +void SkNoPixelsDevice::onClipRegion(const SkRegion& globalRgn, SkClipOp op) { + this->writableClip().op(op, this->globalToDevice(), SkRect::Make(globalRgn.getBounds()), + /*isAA=*/false, /*fillsBounds=*/globalRgn.isRect()); +} + +void SkNoPixelsDevice::onClipShader(sk_sp shader) { + this->writableClip().fIsRect = false; +} + +void SkNoPixelsDevice::onReplaceClip(const SkIRect& rect) { + SkIRect deviceRect = SkMatrixPriv::MapRect(this->globalToDevice(), SkRect::Make(rect)).round(); + if (!deviceRect.intersect(this->bounds())) { + deviceRect.setEmpty(); + } + auto& clip = this->writableClip(); + clip.fClipBounds = deviceRect; + clip.fIsRect = true; + clip.fIsAA = false; +} + +SkBaseDevice::ClipType SkNoPixelsDevice::onGetClipType() const { + const auto& clip = this->clip(); + if (clip.fClipBounds.isEmpty()) { + return ClipType::kEmpty; + } else if (clip.fIsRect) { + return ClipType::kRect; + } else { + return ClipType::kComplex; + } +} + +void SkNoPixelsDevice::ClipState::op(SkClipOp op, const SkM44& transform, const SkRect& bounds, + bool isAA, bool fillsBounds) { + const bool isRect = fillsBounds && SkMatrixPriv::IsScaleTranslateAsM33(transform); + fIsAA |= isAA; + + SkRect devBounds = bounds.isEmpty() ? SkRect::MakeEmpty() + : SkMatrixPriv::MapRect(transform, bounds); + if (op == SkClipOp::kIntersect) { + if (!fClipBounds.intersect(isAA ? devBounds.roundOut() : devBounds.round())) { + fClipBounds.setEmpty(); + } + // A rectangular clip remains rectangular if the intersection is a rect + fIsRect &= isRect; + } else if (isRect) { + // Conservatively, we can leave the clip bounds unchanged and respect the difference op. + // But, if we're subtracting out an axis-aligned rectangle that fully spans our existing + // clip on an axis, we can shrink the clip bounds. + SkASSERT(op == SkClipOp::kDifference); + SkIRect difference; + if (SkRectPriv::Subtract(fClipBounds, isAA ? devBounds.roundIn() : devBounds.round(), + &difference)) { + fClipBounds = difference; + } else { + // The difference couldn't be represented as a rect + fIsRect = false; + } + } else { + // A non-rect shape was applied + fIsRect = false; + } +} diff --git a/gfx/skia/skia/src/core/SkDevice.h b/gfx/skia/skia/src/core/SkDevice.h new file mode 100644 index 0000000000..562351a9da --- /dev/null +++ b/gfx/skia/skia/src/core/SkDevice.h @@ -0,0 +1,637 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDevice_DEFINED +#define SkDevice_DEFINED + +#include "include/core/SkBlender.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkRegion.h" +#include "include/core/SkShader.h" +#include "include/core/SkSurfaceProps.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTArray.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkScalerContext.h" +#include "src/shaders/SkShaderBase.h" + +namespace sktext { +class GlyphRun; +class GlyphRunList; +} +class SkBitmap; +class SkColorSpace; +class SkMesh; +struct SkDrawShadowRec; +class SkImageFilter; +class SkImageFilterCache; +struct SkIRect; +class SkRasterHandleAllocator; +class SkSpecialImage; + +namespace skif { class Mapping; } +namespace skgpu::ganesh { +class Device; +} +namespace skgpu::graphite { +class Device; +} +namespace sktext::gpu { +class SDFTControl; +} + +struct SkStrikeDeviceInfo { + const SkSurfaceProps fSurfaceProps; + const SkScalerContextFlags fScalerContextFlags; + // This is a pointer so this can be compiled without SK_GPU_SUPPORT. + const sktext::gpu::SDFTControl* const fSDFTControl; +}; + +class SkBaseDevice : public SkRefCnt, public SkMatrixProvider { +public: + SkBaseDevice(const SkImageInfo&, const SkSurfaceProps&); + + /** + * Return ImageInfo for this device. If the canvas is not backed by pixels + * (cpu or gpu), then the info's ColorType will be kUnknown_SkColorType. + */ + const SkImageInfo& imageInfo() const { return fInfo; } + + /** + * Return SurfaceProps for this device. + */ + const SkSurfaceProps& surfaceProps() const { + return fSurfaceProps; + } + + SkScalerContextFlags scalerContextFlags() const; + + virtual SkStrikeDeviceInfo strikeDeviceInfo() const { + return {fSurfaceProps, this->scalerContextFlags(), nullptr}; + } + + SkIRect bounds() const { return SkIRect::MakeWH(this->width(), this->height()); } + + /** + * Return the bounds of the device in the coordinate space of the root + * canvas. The root device will have its top-left at 0,0, but other devices + * such as those associated with saveLayer may have a non-zero origin. + */ + void getGlobalBounds(SkIRect* bounds) const { + SkASSERT(bounds); + *bounds = SkMatrixPriv::MapRect(fDeviceToGlobal, SkRect::Make(this->bounds())).roundOut(); + } + + SkIRect getGlobalBounds() const { + SkIRect bounds; + this->getGlobalBounds(&bounds); + return bounds; + } + + /** + * Returns the bounding box of the current clip, in this device's + * coordinate space. No pixels outside of these bounds will be touched by + * draws unless the clip is further modified (at which point this will + * return the updated bounds). + */ + SkIRect devClipBounds() const { return this->onDevClipBounds(); } + + int width() const { + return this->imageInfo().width(); + } + + int height() const { + return this->imageInfo().height(); + } + + bool isOpaque() const { + return this->imageInfo().isOpaque(); + } + + bool writePixels(const SkPixmap&, int x, int y); + + /** + * Try to get write-access to the pixels behind the device. If successful, this returns true + * and fills-out the pixmap parameter. On success it also bumps the genID of the underlying + * bitmap. + * + * On failure, returns false and ignores the pixmap parameter. + */ + bool accessPixels(SkPixmap* pmap); + + /** + * Try to get read-only-access to the pixels behind the device. If successful, this returns + * true and fills-out the pixmap parameter. + * + * On failure, returns false and ignores the pixmap parameter. + */ + bool peekPixels(SkPixmap*); + + /** + * Return the device's coordinate space transform: this maps from the device's coordinate space + * into the global canvas' space (or root device space). This includes the translation + * necessary to account for the device's origin. + */ + const SkM44& deviceToGlobal() const { return fDeviceToGlobal; } + /** + * Return the inverse of getDeviceToGlobal(), mapping from the global canvas' space (or root + * device space) into this device's coordinate space. + */ + const SkM44& globalToDevice() const { return fGlobalToDevice; } + /** + * DEPRECATED: This asserts that 'getDeviceToGlobal' is a translation matrix with integer + * components. In the future some SkDevices will have more complex device-to-global transforms, + * so getDeviceToGlobal() or getRelativeTransform() should be used instead. + */ + SkIPoint getOrigin() const; + /** + * Returns true when this device's pixel grid is axis aligned with the global coordinate space, + * and any relative translation between the two spaces is in integer pixel units. + */ + bool isPixelAlignedToGlobal() const; + /** + * Get the transformation from this device's coordinate system to the provided device space. + * This transform can be used to draw this device into the provided device, such that once + * that device is drawn to the root device, the net effect will be that this device's contents + * have been transformed by the global CTM. + */ + SkMatrix getRelativeTransform(const SkBaseDevice&) const; + + virtual void* getRasterHandle() const { return nullptr; } + + const SkMatrixProvider& asMatrixProvider() const { return *this; } + + void save() { this->onSave(); } + void restore(const SkM44& ctm) { + this->onRestore(); + this->setGlobalCTM(ctm); + } + void restoreLocal(const SkM44& localToDevice) { + this->onRestore(); + this->setLocalToDevice(localToDevice); + } + void clipRect(const SkRect& rect, SkClipOp op, bool aa) { + this->onClipRect(rect, op, aa); + } + void clipRRect(const SkRRect& rrect, SkClipOp op, bool aa) { + this->onClipRRect(rrect, op, aa); + } + void clipPath(const SkPath& path, SkClipOp op, bool aa) { + this->onClipPath(path, op, aa); + } + void clipShader(sk_sp sh, SkClipOp op) { + sh = as_SB(sh)->makeWithCTM(this->localToDevice()); + if (op == SkClipOp::kDifference) { + sh = as_SB(sh)->makeInvertAlpha(); + } + this->onClipShader(std::move(sh)); + } + void clipRegion(const SkRegion& region, SkClipOp op) { + this->onClipRegion(region, op); + } + void replaceClip(const SkIRect& rect) { + this->onReplaceClip(rect); + } + + bool clipIsWideOpen() const { + return this->onClipIsWideOpen(); + } + + void setLocalToDevice(const SkM44& localToDevice) { + fLocalToDevice = localToDevice; + fLocalToDevice33 = fLocalToDevice.asM33(); + fLocalToDeviceDirty = true; + } + void setGlobalCTM(const SkM44& ctm); + virtual void validateDevBounds(const SkIRect&) {} + + virtual bool android_utils_clipWithStencil() { return false; } + + virtual skgpu::ganesh::Device* asGaneshDevice() { return nullptr; } + virtual skgpu::graphite::Device* asGraphiteDevice() { return nullptr; } + + // Ensure that non-RSXForm runs are passed to onDrawGlyphRunList. + void drawGlyphRunList(SkCanvas*, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint); + + // Snap the 'subset' contents from this device, possibly as a read-only view. If 'forceCopy' + // is true then the returned image's pixels must not be affected by subsequent draws into the + // device. When 'forceCopy' is false, the image can be a view into the device's pixels + // (avoiding a copy for performance, at the expense of safety). Default returns null. + virtual sk_sp snapSpecial(const SkIRect& subset, bool forceCopy = false); + // Can return null if unable to perform scaling as part of the copy, even if snapSpecial() w/o + // scaling would succeed. + virtual sk_sp snapSpecialScaled(const SkIRect& subset, const SkISize& dstDims); + // Get a view of the entire device's current contents as an image. + sk_sp snapSpecial(); + +protected: + enum TileUsage { + kPossible_TileUsage, //!< the created device may be drawn tiled + kNever_TileUsage, //!< the created device will never be drawn tiled + }; + + struct TextFlags { + uint32_t fFlags; // SkPaint::getFlags() + }; + + virtual void onSave() {} + virtual void onRestore() {} + virtual void onClipRect(const SkRect& rect, SkClipOp, bool aa) {} + virtual void onClipRRect(const SkRRect& rrect, SkClipOp, bool aa) {} + virtual void onClipPath(const SkPath& path, SkClipOp, bool aa) {} + virtual void onClipShader(sk_sp) {} + virtual void onClipRegion(const SkRegion& deviceRgn, SkClipOp) {} + virtual void onReplaceClip(const SkIRect& rect) {} + virtual bool onClipIsAA() const = 0; + virtual bool onClipIsWideOpen() const = 0; + virtual void onAsRgnClip(SkRegion*) const = 0; + enum class ClipType { + kEmpty, + kRect, + kComplex + }; + virtual ClipType onGetClipType() const = 0; + + // This should strive to be as tight as possible, ideally not just mapping + // the global clip bounds by fToGlobal^-1. + virtual SkIRect onDevClipBounds() const = 0; + + /** These are called inside the per-device-layer loop for each draw call. + When these are called, we have already applied any saveLayer operations, + and are handling any looping from the paint. + */ + virtual void drawPaint(const SkPaint& paint) = 0; + virtual void drawPoints(SkCanvas::PointMode mode, size_t count, + const SkPoint[], const SkPaint& paint) = 0; + virtual void drawRect(const SkRect& r, + const SkPaint& paint) = 0; + virtual void drawRegion(const SkRegion& r, + const SkPaint& paint); + virtual void drawOval(const SkRect& oval, + const SkPaint& paint) = 0; + /** By the time this is called we know that abs(sweepAngle) is in the range [0, 360). */ + virtual void drawArc(const SkRect& oval, SkScalar startAngle, + SkScalar sweepAngle, bool useCenter, const SkPaint& paint); + virtual void drawRRect(const SkRRect& rr, + const SkPaint& paint) = 0; + + // Default impl calls drawPath() + virtual void drawDRRect(const SkRRect& outer, + const SkRRect& inner, const SkPaint&); + + /** + * If pathIsMutable, then the implementation is allowed to cast path to a + * non-const pointer and modify it in place (as an optimization). Canvas + * may do this to implement helpers such as drawOval, by placing a temp + * path on the stack to hold the representation of the oval. + */ + virtual void drawPath(const SkPath& path, + const SkPaint& paint, + bool pathIsMutable = false) = 0; + + virtual void drawImageRect(const SkImage*, const SkRect* src, const SkRect& dst, + const SkSamplingOptions&, const SkPaint&, + SkCanvas::SrcRectConstraint) = 0; + virtual void drawImageLattice(const SkImage*, const SkCanvas::Lattice&, + const SkRect& dst, SkFilterMode, const SkPaint&); + + /** + * If skipColorXform is true, then the implementation should assume that the provided + * vertex colors are already in the destination color space. + */ + virtual void drawVertices(const SkVertices*, + sk_sp, + const SkPaint&, + bool skipColorXform = false) = 0; +#ifdef SK_ENABLE_SKSL + virtual void drawMesh(const SkMesh& mesh, sk_sp, const SkPaint&) = 0; +#endif + virtual void drawShadow(const SkPath&, const SkDrawShadowRec&); + + // default implementation calls drawVertices + virtual void drawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], sk_sp, const SkPaint& paint); + + // default implementation calls drawVertices + virtual void drawAtlas(const SkRSXform[], const SkRect[], const SkColor[], int count, + sk_sp, const SkPaint&); + + virtual void drawAnnotation(const SkRect&, const char[], SkData*) {} + + // Default impl always calls drawRect() with a solid-color paint, setting it to anti-aliased + // only when all edge flags are set. If there's a clip region, it draws that using drawPath, + // or uses clipPath(). + virtual void drawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], + SkCanvas::QuadAAFlags aaFlags, const SkColor4f& color, + SkBlendMode mode); + // Default impl uses drawImageRect per entry, being anti-aliased only when an entry's edge flags + // are all set. If there's a clip region, it will be applied using clipPath(). + virtual void drawEdgeAAImageSet(const SkCanvas::ImageSetEntry[], int count, + const SkPoint dstClips[], const SkMatrix preViewMatrices[], + const SkSamplingOptions&, const SkPaint&, + SkCanvas::SrcRectConstraint); + + virtual void drawDrawable(SkCanvas*, SkDrawable*, const SkMatrix*); + + // Only called with glyphRunLists that do not contain RSXForm. + virtual void onDrawGlyphRunList(SkCanvas*, + const sktext::GlyphRunList&, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) = 0; + + // Slug handling routines. +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) + virtual sk_sp convertGlyphRunListToSlug( + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint); + virtual void drawSlug(SkCanvas*, const sktext::gpu::Slug* slug, const SkPaint& drawingPaint); +#endif + + /** + * The SkDevice passed will be an SkDevice which was returned by a call to + * onCreateDevice on this device with kNeverTile_TileExpectation. + * + * The default implementation calls snapSpecial() and drawSpecial() with the relative transform + * from the input device to this device. The provided SkPaint cannot have a mask filter or + * image filter, and any shader is ignored. + */ + virtual void drawDevice(SkBaseDevice*, const SkSamplingOptions&, const SkPaint&); + + /** + * Draw the special image's subset to this device, subject to the given matrix transform instead + * of the device's current local to device matrix. + */ + virtual void drawSpecial(SkSpecialImage*, const SkMatrix& localToDevice, + const SkSamplingOptions&, const SkPaint&); + + /** + * Evaluate 'filter' and draw the final output into this device using 'paint'. The 'mapping' + * defines the parameter-to-layer space transform used to evaluate the image filter on 'src', + * and the layer-to-device space transform that is used to draw the result into this device. + * Since 'mapping' fully specifies the transform, this draw function ignores the current + * local-to-device matrix (i.e. just like drawSpecial and drawDevice). + * + * The final paint must not have an image filter or mask filter set on it; a shader is ignored. + * The provided color type will be used for any intermediate surfaces that need to be created as + * part of filter evaluation. It does not have to be src's color type or this Device's type. + */ + void drawFilteredImage(const skif::Mapping& mapping, SkSpecialImage* src, SkColorType ct, + const SkImageFilter*, const SkSamplingOptions&, const SkPaint&); + + virtual sk_sp makeSpecial(const SkBitmap&); + virtual sk_sp makeSpecial(const SkImage*); + + virtual void setImmutable() {} + + bool readPixels(const SkPixmap&, int x, int y); + + virtual sk_sp makeSurface(const SkImageInfo&, const SkSurfaceProps&); + virtual bool onPeekPixels(SkPixmap*) { return false; } + + /** + * The caller is responsible for "pre-clipping" the dst. The impl can assume that the dst + * image at the specified x,y offset will fit within the device's bounds. + * + * This is explicitly asserted in readPixels(), the public way to call this. + */ + virtual bool onReadPixels(const SkPixmap&, int x, int y); + + /** + * The caller is responsible for "pre-clipping" the src. The impl can assume that the src + * image at the specified x,y offset will fit within the device's bounds. + * + * This is explicitly asserted in writePixelsDirect(), the public way to call this. + */ + virtual bool onWritePixels(const SkPixmap&, int x, int y); + + virtual bool onAccessPixels(SkPixmap*) { return false; } + + struct CreateInfo { + CreateInfo(const SkImageInfo& info, + SkPixelGeometry geo, + TileUsage tileUsage, + SkRasterHandleAllocator* allocator) + : fInfo(info) + , fTileUsage(tileUsage) + , fPixelGeometry(geo) + , fAllocator(allocator) + {} + + const SkImageInfo fInfo; + const TileUsage fTileUsage; + const SkPixelGeometry fPixelGeometry; + SkRasterHandleAllocator* fAllocator = nullptr; + }; + + /** + * Create a new device based on CreateInfo. If the paint is not null, then it represents a + * preview of how the new device will be composed with its creator device (this). + * + * The subclass may be handed this device in drawDevice(), so it must always return + * a device that it knows how to draw, and that it knows how to identify if it is not of the + * same subclass (since drawDevice is passed a SkBaseDevice*). If the subclass cannot fulfill + * that contract (e.g. PDF cannot support some settings on the paint) it should return NULL, + * and the caller may then decide to explicitly create a bitmapdevice, knowing that later + * it could not call drawDevice with it (but it could call drawSprite or drawBitmap). + */ + virtual SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) { + return nullptr; + } + + // SkCanvas uses NoPixelsDevice when onCreateDevice fails; but then it needs to be able to + // inspect a layer's device to know if calling drawDevice() later is allowed. + virtual bool isNoPixelsDevice() const { return false; } + + // Returns whether or not localToDevice() has changed since the last call to this function. + bool checkLocalToDeviceDirty() { + bool wasDirty = fLocalToDeviceDirty; + fLocalToDeviceDirty = false; + return wasDirty; + } + +private: + friend class SkAndroidFrameworkUtils; + friend class SkCanvas; + friend class SkDraw; + friend class SkDrawBase; + friend class SkSurface_Raster; + friend class DeviceTestingAccess; + + void simplifyGlyphRunRSXFormAndRedraw(SkCanvas*, + const sktext::GlyphRunList&, + const SkPaint& initialPaint, + const SkPaint& drawingPaint); + + // used to change the backend's pixels (and possibly config/rowbytes) + // but cannot change the width/height, so there should be no change to + // any clip information. + // TODO: move to SkBitmapDevice + virtual void replaceBitmapBackendForRasterSurface(const SkBitmap&) {} + + virtual bool forceConservativeRasterClip() const { return false; } + + // Configure the device's coordinate spaces, specifying both how its device image maps back to + // the global space (via 'deviceToGlobal') and the initial CTM of the device (via + // 'localToDevice', i.e. what geometry drawn into this device will be transformed with). + // + // (bufferOriginX, bufferOriginY) defines where the (0,0) pixel the device's backing buffer + // is anchored in the device space. The final device-to-global matrix stored by the SkDevice + // will include a pre-translation by T(deviceOriginX, deviceOriginY), and the final + // local-to-device matrix will have a post-translation of T(-deviceOriginX, -deviceOriginY). + void setDeviceCoordinateSystem(const SkM44& deviceToGlobal, + const SkM44& globalToDevice, + const SkM44& localToDevice, + int bufferOriginX, + int bufferOriginY); + // Convenience to configure the device to be axis-aligned with the root canvas, but with a + // unique origin. + void setOrigin(const SkM44& globalCTM, int x, int y) { + this->setDeviceCoordinateSystem(SkM44(), SkM44(), globalCTM, x, y); + } + + virtual SkImageFilterCache* getImageFilterCache() { return nullptr; } + + friend class SkNoPixelsDevice; + friend class SkBitmapDevice; + void privateResize(int w, int h) { + *const_cast(&fInfo) = fInfo.makeWH(w, h); + } + + const SkImageInfo fInfo; + const SkSurfaceProps fSurfaceProps; + // fDeviceToGlobal and fGlobalToDevice are inverses of each other; there are never that many + // SkDevices, so pay the memory cost to avoid recalculating the inverse. + SkM44 fDeviceToGlobal; + SkM44 fGlobalToDevice; + + // fLocalToDevice (inherited from SkMatrixProvider) is the device CTM, not the global CTM + // It maps from local space to the device's coordinate space. + // fDeviceToGlobal * fLocalToDevice will match the canvas' CTM. + // + // setGlobalCTM and setLocalToDevice are intentionally not virtual for performance reasons. + // However, track a dirty bit for subclasses that want to defer local-to-device dependent + // calculations until needed for a clip or draw. + bool fLocalToDeviceDirty = true; + + using INHERITED = SkRefCnt; +}; + +class SkNoPixelsDevice : public SkBaseDevice { +public: + SkNoPixelsDevice(const SkIRect& bounds, const SkSurfaceProps& props); + SkNoPixelsDevice(const SkIRect& bounds, const SkSurfaceProps& props, + sk_sp colorSpace); + + void resetForNextPicture(const SkIRect& bounds) { + //SkASSERT(bounds.width() >= 0 && bounds.height() >= 0); + this->privateResize(bounds.width(), bounds.height()); + this->setOrigin(SkM44(), bounds.left(), bounds.top()); + this->resetClipStack(); + } + +protected: + // SkNoPixelsDevice tracks the clip conservatively in order to respond to some queries as + // accurately as possible while emphasizing performance + void onSave() override; + void onRestore() override; + void onClipRect(const SkRect& rect, SkClipOp op, bool aa) override; + void onClipRRect(const SkRRect& rrect, SkClipOp op, bool aa) override; + void onClipPath(const SkPath& path, SkClipOp op, bool aa) override; + void onClipRegion(const SkRegion& globalRgn, SkClipOp op) override; + void onClipShader(sk_sp shader) override; + void onReplaceClip(const SkIRect& rect) override; + bool onClipIsAA() const override { return this->clip().fIsAA; } + bool onClipIsWideOpen() const override { + return this->clip().fIsRect && + this->onDevClipBounds() == this->bounds(); + } + void onAsRgnClip(SkRegion* rgn) const override { + rgn->setRect(this->onDevClipBounds()); + } + ClipType onGetClipType() const override; + SkIRect onDevClipBounds() const override { return this->clip().fClipBounds; } + + void drawPaint(const SkPaint& paint) override {} + void drawPoints(SkCanvas::PointMode, size_t, const SkPoint[], const SkPaint&) override {} + void drawImageRect(const SkImage*, const SkRect*, const SkRect&, + const SkSamplingOptions&, const SkPaint&, + SkCanvas::SrcRectConstraint) override {} + void drawRect(const SkRect&, const SkPaint&) override {} + void drawOval(const SkRect&, const SkPaint&) override {} + void drawRRect(const SkRRect&, const SkPaint&) override {} + void drawPath(const SkPath&, const SkPaint&, bool) override {} + void drawDevice(SkBaseDevice*, const SkSamplingOptions&, const SkPaint&) override {} + void drawVertices(const SkVertices*, sk_sp, const SkPaint&, bool) override {} +#ifdef SK_ENABLE_SKSL + void drawMesh(const SkMesh&, sk_sp, const SkPaint&) override {} +#endif + +#if defined(SK_GANESH) + void drawSlug(SkCanvas*, const sktext::gpu::Slug*, const SkPaint&) override {} +#endif + + void onDrawGlyphRunList( + SkCanvas*, const sktext::GlyphRunList&, const SkPaint&, const SkPaint&) override {} + + bool isNoPixelsDevice() const override { return true; } + +private: + struct ClipState { + SkIRect fClipBounds; + int fDeferredSaveCount; + bool fIsAA; + bool fIsRect; + + ClipState(const SkIRect& bounds, bool isAA, bool isRect) + : fClipBounds(bounds) + , fDeferredSaveCount(0) + , fIsAA(isAA) + , fIsRect(isRect) {} + + void op(SkClipOp op, const SkM44& transform, const SkRect& bounds, + bool isAA, bool fillsBounds); + }; + + const ClipState& clip() const { return fClipStack.back(); } + ClipState& writableClip(); + + void resetClipStack() { + fClipStack.clear(); + fClipStack.emplace_back(this->bounds(), /*isAA=*/false, /*isRect=*/true); + } + + SkSTArray<4, ClipState> fClipStack; + + using INHERITED = SkBaseDevice; +}; + +class SkAutoDeviceTransformRestore : SkNoncopyable { +public: + SkAutoDeviceTransformRestore(SkBaseDevice* device, const SkMatrix& localToDevice) + : fDevice(device) + , fPrevLocalToDevice(device->localToDevice()) + { + fDevice->setLocalToDevice(SkM44(localToDevice)); + } + ~SkAutoDeviceTransformRestore() { + fDevice->setLocalToDevice(fPrevLocalToDevice); + } + +private: + SkBaseDevice* fDevice; + const SkM44 fPrevLocalToDevice; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkDistanceFieldGen.cpp b/gfx/skia/skia/src/core/SkDistanceFieldGen.cpp new file mode 100644 index 0000000000..828ba25768 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDistanceFieldGen.cpp @@ -0,0 +1,567 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkColorData.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkAutoMalloc.h" +#include "src/core/SkDistanceFieldGen.h" +#include "src/core/SkMask.h" +#include "src/core/SkPointPriv.h" + +#include + +using namespace skia_private; + +#if !defined(SK_DISABLE_SDF_TEXT) + +struct DFData { + float fAlpha; // alpha value of source texel + float fDistSq; // distance squared to nearest (so far) edge texel + SkPoint fDistVector; // distance vector to nearest (so far) edge texel +}; + +enum NeighborFlags { + kLeft_NeighborFlag = 0x01, + kRight_NeighborFlag = 0x02, + kTopLeft_NeighborFlag = 0x04, + kTop_NeighborFlag = 0x08, + kTopRight_NeighborFlag = 0x10, + kBottomLeft_NeighborFlag = 0x20, + kBottom_NeighborFlag = 0x40, + kBottomRight_NeighborFlag = 0x80, + kAll_NeighborFlags = 0xff, + + kNeighborFlagCount = 8 +}; + +// We treat an "edge" as a place where we cross from >=128 to <128, or vice versa, or +// where we have two non-zero pixels that are <128. +// 'neighborFlags' is used to limit the directions in which we test to avoid indexing +// outside of the image +static bool found_edge(const unsigned char* imagePtr, int width, int neighborFlags) { + // the order of these should match the neighbor flags above + const int kNum8ConnectedNeighbors = 8; + const int offsets[8] = {-1, 1, -width-1, -width, -width+1, width-1, width, width+1 }; + SkASSERT(kNum8ConnectedNeighbors == kNeighborFlagCount); + + // search for an edge + unsigned char currVal = *imagePtr; + unsigned char currCheck = (currVal >> 7); + for (int i = 0; i < kNum8ConnectedNeighbors; ++i) { + unsigned char neighborVal; + if ((1 << i) & neighborFlags) { + const unsigned char* checkPtr = imagePtr + offsets[i]; + neighborVal = *checkPtr; + } else { + neighborVal = 0; + } + unsigned char neighborCheck = (neighborVal >> 7); + SkASSERT(currCheck == 0 || currCheck == 1); + SkASSERT(neighborCheck == 0 || neighborCheck == 1); + // if sharp transition + if (currCheck != neighborCheck || + // or both <128 and >0 + (!currCheck && !neighborCheck && currVal && neighborVal)) { + return true; + } + } + + return false; +} + +static void init_glyph_data(DFData* data, unsigned char* edges, const unsigned char* image, + int dataWidth, int dataHeight, + int imageWidth, int imageHeight, + int pad) { + data += pad*dataWidth; + data += pad; + edges += (pad*dataWidth + pad); + + for (int j = 0; j < imageHeight; ++j) { + for (int i = 0; i < imageWidth; ++i) { + if (255 == *image) { + data->fAlpha = 1.0f; + } else { + data->fAlpha = (*image)*0.00392156862f; // 1/255 + } + int checkMask = kAll_NeighborFlags; + if (i == 0) { + checkMask &= ~(kLeft_NeighborFlag|kTopLeft_NeighborFlag|kBottomLeft_NeighborFlag); + } + if (i == imageWidth-1) { + checkMask &= ~(kRight_NeighborFlag|kTopRight_NeighborFlag|kBottomRight_NeighborFlag); + } + if (j == 0) { + checkMask &= ~(kTopLeft_NeighborFlag|kTop_NeighborFlag|kTopRight_NeighborFlag); + } + if (j == imageHeight-1) { + checkMask &= ~(kBottomLeft_NeighborFlag|kBottom_NeighborFlag|kBottomRight_NeighborFlag); + } + if (found_edge(image, imageWidth, checkMask)) { + *edges = 255; // using 255 makes for convenient debug rendering + } + ++data; + ++image; + ++edges; + } + data += 2*pad; + edges += 2*pad; + } +} + +// from Gustavson (2011) +// computes the distance to an edge given an edge normal vector and a pixel's alpha value +// assumes that direction has been pre-normalized +static float edge_distance(const SkPoint& direction, float alpha) { + float dx = direction.fX; + float dy = direction.fY; + float distance; + if (SkScalarNearlyZero(dx) || SkScalarNearlyZero(dy)) { + distance = 0.5f - alpha; + } else { + // this is easier if we treat the direction as being in the first octant + // (other octants are symmetrical) + dx = SkScalarAbs(dx); + dy = SkScalarAbs(dy); + if (dx < dy) { + using std::swap; + swap(dx, dy); + } + + // a1 = 0.5*dy/dx is the smaller fractional area chopped off by the edge + // to avoid the divide, we just consider the numerator + float a1num = 0.5f*dy; + + // we now compute the approximate distance, depending where the alpha falls + // relative to the edge fractional area + + // if 0 <= alpha < a1 + if (alpha*dx < a1num) { + // TODO: find a way to do this without square roots? + distance = 0.5f*(dx + dy) - SkScalarSqrt(2.0f*dx*dy*alpha); + // if a1 <= alpha <= 1 - a1 + } else if (alpha*dx < (dx - a1num)) { + distance = (0.5f - alpha)*dx; + // if 1 - a1 < alpha <= 1 + } else { + // TODO: find a way to do this without square roots? + distance = -0.5f*(dx + dy) + SkScalarSqrt(2.0f*dx*dy*(1.0f - alpha)); + } + } + + return distance; +} + +static void init_distances(DFData* data, unsigned char* edges, int width, int height) { + // skip one pixel border + DFData* currData = data; + DFData* prevData = data - width; + DFData* nextData = data + width; + + for (int j = 0; j < height; ++j) { + for (int i = 0; i < width; ++i) { + if (*edges) { + // we should not be in the one-pixel outside band + SkASSERT(i > 0 && i < width-1 && j > 0 && j < height-1); + // gradient will point from low to high + // +y is down in this case + // i.e., if you're outside, gradient points towards edge + // if you're inside, gradient points away from edge + SkPoint currGrad; + currGrad.fX = (prevData+1)->fAlpha - (prevData-1)->fAlpha + + SK_ScalarSqrt2*(currData+1)->fAlpha + - SK_ScalarSqrt2*(currData-1)->fAlpha + + (nextData+1)->fAlpha - (nextData-1)->fAlpha; + currGrad.fY = (nextData-1)->fAlpha - (prevData-1)->fAlpha + + SK_ScalarSqrt2*nextData->fAlpha + - SK_ScalarSqrt2*prevData->fAlpha + + (nextData+1)->fAlpha - (prevData+1)->fAlpha; + SkPointPriv::SetLengthFast(&currGrad, 1.0f); + + // init squared distance to edge and distance vector + float dist = edge_distance(currGrad, currData->fAlpha); + currGrad.scale(dist, &currData->fDistVector); + currData->fDistSq = dist*dist; + } else { + // init distance to "far away" + currData->fDistSq = 2000000.f; + currData->fDistVector.fX = 1000.f; + currData->fDistVector.fY = 1000.f; + } + ++currData; + ++prevData; + ++nextData; + ++edges; + } + } +} + +// Danielsson's 8SSEDT + +// first stage forward pass +// (forward in Y, forward in X) +static void F1(DFData* curr, int width) { + // upper left + DFData* check = curr - width-1; + SkPoint distVec = check->fDistVector; + float distSq = check->fDistSq - 2.0f*(distVec.fX + distVec.fY - 1.0f); + if (distSq < curr->fDistSq) { + distVec.fX -= 1.0f; + distVec.fY -= 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } + + // up + check = curr - width; + distVec = check->fDistVector; + distSq = check->fDistSq - 2.0f*distVec.fY + 1.0f; + if (distSq < curr->fDistSq) { + distVec.fY -= 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } + + // upper right + check = curr - width+1; + distVec = check->fDistVector; + distSq = check->fDistSq + 2.0f*(distVec.fX - distVec.fY + 1.0f); + if (distSq < curr->fDistSq) { + distVec.fX += 1.0f; + distVec.fY -= 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } + + // left + check = curr - 1; + distVec = check->fDistVector; + distSq = check->fDistSq - 2.0f*distVec.fX + 1.0f; + if (distSq < curr->fDistSq) { + distVec.fX -= 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } +} + +// second stage forward pass +// (forward in Y, backward in X) +static void F2(DFData* curr, int width) { + // right + DFData* check = curr + 1; + SkPoint distVec = check->fDistVector; + float distSq = check->fDistSq + 2.0f*distVec.fX + 1.0f; + if (distSq < curr->fDistSq) { + distVec.fX += 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } +} + +// first stage backward pass +// (backward in Y, forward in X) +static void B1(DFData* curr, int width) { + // left + DFData* check = curr - 1; + SkPoint distVec = check->fDistVector; + float distSq = check->fDistSq - 2.0f*distVec.fX + 1.0f; + if (distSq < curr->fDistSq) { + distVec.fX -= 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } +} + +// second stage backward pass +// (backward in Y, backwards in X) +static void B2(DFData* curr, int width) { + // right + DFData* check = curr + 1; + SkPoint distVec = check->fDistVector; + float distSq = check->fDistSq + 2.0f*distVec.fX + 1.0f; + if (distSq < curr->fDistSq) { + distVec.fX += 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } + + // bottom left + check = curr + width-1; + distVec = check->fDistVector; + distSq = check->fDistSq - 2.0f*(distVec.fX - distVec.fY - 1.0f); + if (distSq < curr->fDistSq) { + distVec.fX -= 1.0f; + distVec.fY += 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } + + // bottom + check = curr + width; + distVec = check->fDistVector; + distSq = check->fDistSq + 2.0f*distVec.fY + 1.0f; + if (distSq < curr->fDistSq) { + distVec.fY += 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } + + // bottom right + check = curr + width+1; + distVec = check->fDistVector; + distSq = check->fDistSq + 2.0f*(distVec.fX + distVec.fY + 1.0f); + if (distSq < curr->fDistSq) { + distVec.fX += 1.0f; + distVec.fY += 1.0f; + curr->fDistSq = distSq; + curr->fDistVector = distVec; + } +} + +// enable this to output edge data rather than the distance field +#define DUMP_EDGE 0 + +#if !DUMP_EDGE +template +static unsigned char pack_distance_field_val(float dist) { + // The distance field is constructed as unsigned char values, so that the zero value is at 128, + // Beside 128, we have 128 values in range [0, 128), but only 127 values in range (128, 255]. + // So we multiply distanceMagnitude by 127/128 at the latter range to avoid overflow. + dist = SkTPin(-dist, -distanceMagnitude, distanceMagnitude * 127.0f / 128.0f); + + // Scale into the positive range for unsigned distance. + dist += distanceMagnitude; + + // Scale into unsigned char range. + // Round to place negative and positive values as equally as possible around 128 + // (which represents zero). + return (unsigned char)SkScalarRoundToInt(dist / (2 * distanceMagnitude) * 256.0f); +} +#endif + +// assumes a padded 8-bit image and distance field +// width and height are the original width and height of the image +static bool generate_distance_field_from_image(unsigned char* distanceField, + const unsigned char* copyPtr, + int width, int height) { + SkASSERT(distanceField); + SkASSERT(copyPtr); + + // we expand our temp data by one more on each side to simplify + // the scanning code -- will always be treated as infinitely far away + int pad = SK_DistanceFieldPad + 1; + + // set params for distance field data + int dataWidth = width + 2*pad; + int dataHeight = height + 2*pad; + + // create zeroed temp DFData+edge storage + UniqueVoidPtr storage(sk_calloc_throw(dataWidth*dataHeight*(sizeof(DFData) + 1))); + DFData* dataPtr = (DFData*)storage.get(); + unsigned char* edgePtr = (unsigned char*)storage.get() + dataWidth*dataHeight*sizeof(DFData); + + // copy glyph into distance field storage + init_glyph_data(dataPtr, edgePtr, copyPtr, + dataWidth, dataHeight, + width+2, height+2, SK_DistanceFieldPad); + + // create initial distance data, particularly at edges + init_distances(dataPtr, edgePtr, dataWidth, dataHeight); + + // now perform Euclidean distance transform to propagate distances + + // forwards in y + DFData* currData = dataPtr+dataWidth+1; // skip outer buffer + unsigned char* currEdge = edgePtr+dataWidth+1; + for (int j = 1; j < dataHeight-1; ++j) { + // forwards in x + for (int i = 1; i < dataWidth-1; ++i) { + // don't need to calculate distance for edge pixels + if (!*currEdge) { + F1(currData, dataWidth); + } + ++currData; + ++currEdge; + } + + // backwards in x + --currData; // reset to end + --currEdge; + for (int i = 1; i < dataWidth-1; ++i) { + // don't need to calculate distance for edge pixels + if (!*currEdge) { + F2(currData, dataWidth); + } + --currData; + --currEdge; + } + + currData += dataWidth+1; + currEdge += dataWidth+1; + } + + // backwards in y + currData = dataPtr+dataWidth*(dataHeight-2) - 1; // skip outer buffer + currEdge = edgePtr+dataWidth*(dataHeight-2) - 1; + for (int j = 1; j < dataHeight-1; ++j) { + // forwards in x + for (int i = 1; i < dataWidth-1; ++i) { + // don't need to calculate distance for edge pixels + if (!*currEdge) { + B1(currData, dataWidth); + } + ++currData; + ++currEdge; + } + + // backwards in x + --currData; // reset to end + --currEdge; + for (int i = 1; i < dataWidth-1; ++i) { + // don't need to calculate distance for edge pixels + if (!*currEdge) { + B2(currData, dataWidth); + } + --currData; + --currEdge; + } + + currData -= dataWidth-1; + currEdge -= dataWidth-1; + } + + // copy results to final distance field data + currData = dataPtr + dataWidth+1; + currEdge = edgePtr + dataWidth+1; + unsigned char *dfPtr = distanceField; + for (int j = 1; j < dataHeight-1; ++j) { + for (int i = 1; i < dataWidth-1; ++i) { +#if DUMP_EDGE + float alpha = currData->fAlpha; + float edge = 0.0f; + if (*currEdge) { + edge = 0.25f; + } + // blend with original image + float result = alpha + (1.0f-alpha)*edge; + unsigned char val = sk_float_round2int(255*result); + *dfPtr++ = val; +#else + float dist; + if (currData->fAlpha > 0.5f) { + dist = -SkScalarSqrt(currData->fDistSq); + } else { + dist = SkScalarSqrt(currData->fDistSq); + } + *dfPtr++ = pack_distance_field_val(dist); +#endif + ++currData; + ++currEdge; + } + currData += 2; + currEdge += 2; + } + + return true; +} + +// assumes an 8-bit image and distance field +bool SkGenerateDistanceFieldFromA8Image(unsigned char* distanceField, + const unsigned char* image, + int width, int height, size_t rowBytes) { + SkASSERT(distanceField); + SkASSERT(image); + + // create temp data + SkAutoSMalloc<1024> copyStorage((width+2)*(height+2)*sizeof(char)); + unsigned char* copyPtr = (unsigned char*) copyStorage.get(); + + // we copy our source image into a padded copy to ensure we catch edge transitions + // around the outside + const unsigned char* currSrcScanLine = image; + sk_bzero(copyPtr, (width+2)*sizeof(char)); + unsigned char* currDestPtr = copyPtr + width + 2; + for (int i = 0; i < height; ++i) { + *currDestPtr++ = 0; + memcpy(currDestPtr, currSrcScanLine, width); + currSrcScanLine += rowBytes; + currDestPtr += width; + *currDestPtr++ = 0; + } + sk_bzero(currDestPtr, (width+2)*sizeof(char)); + + return generate_distance_field_from_image(distanceField, copyPtr, width, height); +} + +// assumes a 16-bit lcd mask and 8-bit distance field +bool SkGenerateDistanceFieldFromLCD16Mask(unsigned char* distanceField, + const unsigned char* image, + int w, int h, size_t rowBytes) { + SkASSERT(distanceField); + SkASSERT(image); + + // create temp data + SkAutoSMalloc<1024> copyStorage((w+2)*(h+2)*sizeof(char)); + unsigned char* copyPtr = (unsigned char*) copyStorage.get(); + + // we copy our source image into a padded copy to ensure we catch edge transitions + // around the outside + const uint16_t* start = reinterpret_cast(image); + auto currSrcScanline = SkMask::AlphaIter(start); + auto endSrcScanline = SkMask::AlphaIter(start + w); + sk_bzero(copyPtr, (w+2)*sizeof(char)); + unsigned char* currDestPtr = copyPtr + w + 2; + for (int i = 0; i < h; ++i, currSrcScanline >>= rowBytes, endSrcScanline >>= rowBytes) { + *currDestPtr++ = 0; + for (auto src = currSrcScanline; src < endSrcScanline; ++src) { + *currDestPtr++ = *src; + } + *currDestPtr++ = 0; + } + sk_bzero(currDestPtr, (w+2)*sizeof(char)); + + return generate_distance_field_from_image(distanceField, copyPtr, w, h); +} + +// assumes a 1-bit image and 8-bit distance field +bool SkGenerateDistanceFieldFromBWImage(unsigned char* distanceField, + const unsigned char* image, + int width, int height, size_t rowBytes) { + SkASSERT(distanceField); + SkASSERT(image); + + // create temp data + SkAutoSMalloc<1024> copyStorage((width+2)*(height+2)*sizeof(char)); + unsigned char* copyPtr = (unsigned char*) copyStorage.get(); + + // we copy our source image into a padded copy to ensure we catch edge transitions + // around the outside + const unsigned char* currSrcScanLine = image; + sk_bzero(copyPtr, (width+2)*sizeof(char)); + unsigned char* currDestPtr = copyPtr + width + 2; + for (int i = 0; i < height; ++i) { + *currDestPtr++ = 0; + + int rowWritesLeft = width; + const unsigned char *maskPtr = currSrcScanLine; + while (rowWritesLeft > 0) { + unsigned mask = *maskPtr++; + for (int j = 7; j >= 0 && rowWritesLeft; --j, --rowWritesLeft) { + *currDestPtr++ = (mask & (1 << j)) ? 0xff : 0; + } + } + currSrcScanLine += rowBytes; + + *currDestPtr++ = 0; + } + sk_bzero(currDestPtr, (width+2)*sizeof(char)); + + return generate_distance_field_from_image(distanceField, copyPtr, width, height); +} + +#endif // !defined(SK_DISABLE_SDF_TEXT) diff --git a/gfx/skia/skia/src/core/SkDistanceFieldGen.h b/gfx/skia/skia/src/core/SkDistanceFieldGen.h new file mode 100644 index 0000000000..8374dbe05b --- /dev/null +++ b/gfx/skia/skia/src/core/SkDistanceFieldGen.h @@ -0,0 +1,81 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkDistanceFieldGen_DEFINED +#define SkDistanceFieldGen_DEFINED + +#include "include/core/SkTypes.h" + +#include + +#if !defined(SK_DISABLE_SDF_TEXT) + +// the max magnitude for the distance field +// distance values are limited to the range (-SK_DistanceFieldMagnitude, SK_DistanceFieldMagnitude] +#define SK_DistanceFieldMagnitude 4 +// we need to pad around the original glyph to allow our maximum distance of +// SK_DistanceFieldMagnitude texels away from any edge +#define SK_DistanceFieldPad 4 +// the rect we render with is inset from the distance field glyph size to allow for bilerp +#define SK_DistanceFieldInset 2 + +// For the fragment shader: +// The distance field is constructed as unsigned char values, +// so that the zero value is at 128, and the supported range of distances is [-4 * 127/128, 4]. +// Hence our multiplier (width of the range) is 4 * 255/128 and zero threshold is 128/255. +#define SK_DistanceFieldMultiplier "7.96875" +#define SK_DistanceFieldThreshold "0.50196078431" + +/** Given 8-bit mask data, generate the associated distance field + + * @param distanceField The distance field to be generated. Should already be allocated + * by the client with the padding above. + * @param image 8-bit mask we're using to generate the distance field. + * @param w Width of the original image. + * @param h Height of the original image. + * @param rowBytes Size of each row in the image, in bytes + */ +bool SkGenerateDistanceFieldFromA8Image(unsigned char* distanceField, + const unsigned char* image, + int w, int h, size_t rowBytes); + +/** Given LCD16 mask data (not a 16-bit image), generate the associated distance field + + * @param distanceField The distance field to be generated. Should already be allocated + * by the client with the padding above. + * @param image 16-bit LCD data we're using to generate the distance field. + * @param w Width of the original image. + * @param h Height of the original image. + * @param rowBytes Size of each row in the image, in bytes + */ +bool SkGenerateDistanceFieldFromLCD16Mask(unsigned char* distanceField, + const unsigned char* image, + int w, int h, size_t rowBytes); + +/** Given 1-bit mask data, generate the associated distance field + + * @param distanceField The distance field to be generated. Should already be allocated + * by the client with the padding above. + * @param image 1-bit mask we're using to generate the distance field. + * @param w Width of the original image. + * @param h Height of the original image. + * @param rowBytes Size of each row in the image, in bytes + */ +bool SkGenerateDistanceFieldFromBWImage(unsigned char* distanceField, + const unsigned char* image, + int w, int h, size_t rowBytes); + +/** Given width and height of original image, return size (in bytes) of distance field + * @param w Width of the original image. + * @param h Height of the original image. + */ +inline size_t SkComputeDistanceFieldSize(int w, int h) { + return (w + 2*SK_DistanceFieldPad) * (h + 2*SK_DistanceFieldPad) * sizeof(unsigned char); +} + +#endif // !defined(SK_DISABLE_SDF_TEXT) + +#endif diff --git a/gfx/skia/skia/src/core/SkDocument.cpp b/gfx/skia/skia/src/core/SkDocument.cpp new file mode 100644 index 0000000000..30c94d8317 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDocument.cpp @@ -0,0 +1,78 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkDocument.h" +#include "include/core/SkStream.h" + +SkDocument::SkDocument(SkWStream* stream) : fStream(stream), fState(kBetweenPages_State) {} + +SkDocument::~SkDocument() { + this->close(); +} + +static SkCanvas* trim(SkCanvas* canvas, SkScalar width, SkScalar height, + const SkRect* content) { + if (content && canvas) { + SkRect inner = *content; + if (!inner.intersect({0, 0, width, height})) { + return nullptr; + } + canvas->clipRect(inner); + canvas->translate(inner.x(), inner.y()); + } + return canvas; +} + +SkCanvas* SkDocument::beginPage(SkScalar width, SkScalar height, + const SkRect* content) { + if (width <= 0 || height <= 0 || kClosed_State == fState) { + return nullptr; + } + if (kInPage_State == fState) { + this->endPage(); + } + SkASSERT(kBetweenPages_State == fState); + fState = kInPage_State; + return trim(this->onBeginPage(width, height), width, height, content); +} + +void SkDocument::endPage() { + if (kInPage_State == fState) { + fState = kBetweenPages_State; + this->onEndPage(); + } +} + +void SkDocument::close() { + for (;;) { + switch (fState) { + case kBetweenPages_State: { + fState = kClosed_State; + this->onClose(fStream); + // we don't own the stream, but we mark it nullptr since we can + // no longer write to it. + fStream = nullptr; + return; + } + case kInPage_State: + this->endPage(); + break; + case kClosed_State: + return; + } + } +} + +void SkDocument::abort() { + this->onAbort(); + + fState = kClosed_State; + // we don't own the stream, but we mark it nullptr since we can + // no longer write to it. + fStream = nullptr; +} diff --git a/gfx/skia/skia/src/core/SkDraw.cpp b/gfx/skia/skia/src/core/SkDraw.cpp new file mode 100644 index 0000000000..cdecd7b82d --- /dev/null +++ b/gfx/skia/skia/src/core/SkDraw.cpp @@ -0,0 +1,616 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkColorType.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRegion.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTileMode.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkAutoBlitterChoose.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkDraw.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkMatrixUtils.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRectPriv.h" +#include "src/core/SkScan.h" +#include + +#if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) +#include "src/core/SkMaskFilterBase.h" +#endif + +using namespace skia_private; + +static SkPaint make_paint_with_image(const SkPaint& origPaint, const SkBitmap& bitmap, + const SkSamplingOptions& sampling, + SkMatrix* matrix = nullptr) { + SkPaint paint(origPaint); + paint.setShader(SkMakeBitmapShaderForPaint(origPaint, bitmap, SkTileMode::kClamp, + SkTileMode::kClamp, sampling, matrix, + kNever_SkCopyPixelsMode)); + return paint; +} + +SkDraw::SkDraw() { + fBlitterChooser = SkBlitter::Choose; +} + +struct PtProcRec { + SkCanvas::PointMode fMode; + const SkPaint* fPaint; + const SkRegion* fClip; + const SkRasterClip* fRC; + + // computed values + SkRect fClipBounds; + SkScalar fRadius; + + typedef void (*Proc)(const PtProcRec&, const SkPoint devPts[], int count, + SkBlitter*); + + bool init(SkCanvas::PointMode, const SkPaint&, const SkMatrix* matrix, + const SkRasterClip*); + Proc chooseProc(SkBlitter** blitter); + +private: + SkAAClipBlitterWrapper fWrapper; +}; + +static void bw_pt_rect_hair_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + SkASSERT(rec.fClip->isRect()); + const SkIRect& r = rec.fClip->getBounds(); + + for (int i = 0; i < count; i++) { + int x = SkScalarFloorToInt(devPts[i].fX); + int y = SkScalarFloorToInt(devPts[i].fY); + if (r.contains(x, y)) { + blitter->blitH(x, y, 1); + } + } +} + +static void bw_pt_rect_16_hair_proc(const PtProcRec& rec, + const SkPoint devPts[], int count, + SkBlitter* blitter) { + SkASSERT(rec.fRC->isRect()); + const SkIRect& r = rec.fRC->getBounds(); + uint32_t value; + const SkPixmap* dst = blitter->justAnOpaqueColor(&value); + SkASSERT(dst); + + uint16_t* addr = dst->writable_addr16(0, 0); + size_t rb = dst->rowBytes(); + + for (int i = 0; i < count; i++) { + int x = SkScalarFloorToInt(devPts[i].fX); + int y = SkScalarFloorToInt(devPts[i].fY); + if (r.contains(x, y)) { + ((uint16_t*)((char*)addr + y * rb))[x] = SkToU16(value); + } + } +} + +static void bw_pt_rect_32_hair_proc(const PtProcRec& rec, + const SkPoint devPts[], int count, + SkBlitter* blitter) { + SkASSERT(rec.fRC->isRect()); + const SkIRect& r = rec.fRC->getBounds(); + uint32_t value; + const SkPixmap* dst = blitter->justAnOpaqueColor(&value); + SkASSERT(dst); + + SkPMColor* addr = dst->writable_addr32(0, 0); + size_t rb = dst->rowBytes(); + + for (int i = 0; i < count; i++) { + int x = SkScalarFloorToInt(devPts[i].fX); + int y = SkScalarFloorToInt(devPts[i].fY); + if (r.contains(x, y)) { + ((SkPMColor*)((char*)addr + y * rb))[x] = value; + } + } +} + +static void bw_pt_hair_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + for (int i = 0; i < count; i++) { + int x = SkScalarFloorToInt(devPts[i].fX); + int y = SkScalarFloorToInt(devPts[i].fY); + if (rec.fClip->contains(x, y)) { + blitter->blitH(x, y, 1); + } + } +} + +static void bw_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + for (int i = 0; i < count; i += 2) { + SkScan::HairLine(&devPts[i], 2, *rec.fRC, blitter); + } +} + +static void bw_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + SkScan::HairLine(devPts, count, *rec.fRC, blitter); +} + +// aa versions + +static void aa_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + for (int i = 0; i < count; i += 2) { + SkScan::AntiHairLine(&devPts[i], 2, *rec.fRC, blitter); + } +} + +static void aa_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + SkScan::AntiHairLine(devPts, count, *rec.fRC, blitter); +} + +// square procs (strokeWidth > 0 but matrix is square-scale (sx == sy) + +static SkRect make_square_rad(SkPoint center, SkScalar radius) { + return { + center.fX - radius, center.fY - radius, + center.fX + radius, center.fY + radius + }; +} + +static SkXRect make_xrect(const SkRect& r) { + SkASSERT(SkRectPriv::FitsInFixed(r)); + return { + SkScalarToFixed(r.fLeft), SkScalarToFixed(r.fTop), + SkScalarToFixed(r.fRight), SkScalarToFixed(r.fBottom) + }; +} + +static void bw_square_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + for (int i = 0; i < count; i++) { + SkRect r = make_square_rad(devPts[i], rec.fRadius); + if (r.intersect(rec.fClipBounds)) { + SkScan::FillXRect(make_xrect(r), *rec.fRC, blitter); + } + } +} + +static void aa_square_proc(const PtProcRec& rec, const SkPoint devPts[], + int count, SkBlitter* blitter) { + for (int i = 0; i < count; i++) { + SkRect r = make_square_rad(devPts[i], rec.fRadius); + if (r.intersect(rec.fClipBounds)) { + SkScan::AntiFillXRect(make_xrect(r), *rec.fRC, blitter); + } + } +} + +// If this returns true, then chooseProc() must return a valid proc +bool PtProcRec::init(SkCanvas::PointMode mode, const SkPaint& paint, + const SkMatrix* matrix, const SkRasterClip* rc) { + if ((unsigned)mode > (unsigned)SkCanvas::kPolygon_PointMode) { + return false; + } + if (paint.getPathEffect() || paint.getMaskFilter()) { + return false; + } + SkScalar width = paint.getStrokeWidth(); + SkScalar radius = -1; // sentinel value, a "valid" value must be > 0 + + if (0 == width) { + radius = 0.5f; + } else if (paint.getStrokeCap() != SkPaint::kRound_Cap && + matrix->isScaleTranslate() && SkCanvas::kPoints_PointMode == mode) { + SkScalar sx = matrix->get(SkMatrix::kMScaleX); + SkScalar sy = matrix->get(SkMatrix::kMScaleY); + if (SkScalarNearlyZero(sx - sy)) { + radius = SkScalarHalf(width * SkScalarAbs(sx)); + } + } + if (radius > 0) { + SkRect clipBounds = SkRect::Make(rc->getBounds()); + // if we return true, the caller may assume that the constructed shapes can be represented + // using SkFixed (after clipping), so we preflight that here. + if (!SkRectPriv::FitsInFixed(clipBounds)) { + return false; + } + fMode = mode; + fPaint = &paint; + fClip = nullptr; + fRC = rc; + fClipBounds = clipBounds; + fRadius = radius; + return true; + } + return false; +} + +PtProcRec::Proc PtProcRec::chooseProc(SkBlitter** blitterPtr) { + Proc proc = nullptr; + + SkBlitter* blitter = *blitterPtr; + if (fRC->isBW()) { + fClip = &fRC->bwRgn(); + } else { + fWrapper.init(*fRC, blitter); + fClip = &fWrapper.getRgn(); + blitter = fWrapper.getBlitter(); + *blitterPtr = blitter; + } + + // for our arrays + SkASSERT(0 == SkCanvas::kPoints_PointMode); + SkASSERT(1 == SkCanvas::kLines_PointMode); + SkASSERT(2 == SkCanvas::kPolygon_PointMode); + SkASSERT((unsigned)fMode <= (unsigned)SkCanvas::kPolygon_PointMode); + + if (fPaint->isAntiAlias()) { + if (0 == fPaint->getStrokeWidth()) { + static const Proc gAAProcs[] = { + aa_square_proc, aa_line_hair_proc, aa_poly_hair_proc + }; + proc = gAAProcs[fMode]; + } else if (fPaint->getStrokeCap() != SkPaint::kRound_Cap) { + SkASSERT(SkCanvas::kPoints_PointMode == fMode); + proc = aa_square_proc; + } + } else { // BW + if (fRadius <= 0.5f) { // small radii and hairline + if (SkCanvas::kPoints_PointMode == fMode && fClip->isRect()) { + uint32_t value; + const SkPixmap* bm = blitter->justAnOpaqueColor(&value); + if (bm && kRGB_565_SkColorType == bm->colorType()) { + proc = bw_pt_rect_16_hair_proc; + } else if (bm && kN32_SkColorType == bm->colorType()) { + proc = bw_pt_rect_32_hair_proc; + } else { + proc = bw_pt_rect_hair_proc; + } + } else { + static Proc gBWProcs[] = { + bw_pt_hair_proc, bw_line_hair_proc, bw_poly_hair_proc + }; + proc = gBWProcs[fMode]; + } + } else { + proc = bw_square_proc; + } + } + return proc; +} + +// each of these costs 8-bytes of stack space, so don't make it too large +// must be even for lines/polygon to work +#define MAX_DEV_PTS 32 + +void SkDraw::drawPoints(SkCanvas::PointMode mode, size_t count, + const SkPoint pts[], const SkPaint& paint, + SkBaseDevice* device) const { + // if we're in lines mode, force count to be even + if (SkCanvas::kLines_PointMode == mode) { + count &= ~(size_t)1; + } + + SkASSERT(pts != nullptr); + SkDEBUGCODE(this->validate();) + + // nothing to draw + if (!count || fRC->isEmpty()) { + return; + } + + SkMatrix ctm = fMatrixProvider->localToDevice(); + PtProcRec rec; + if (!device && rec.init(mode, paint, &ctm, fRC)) { + SkAutoBlitterChoose blitter(*this, nullptr, paint); + + SkPoint devPts[MAX_DEV_PTS]; + SkBlitter* bltr = blitter.get(); + PtProcRec::Proc proc = rec.chooseProc(&bltr); + // we have to back up subsequent passes if we're in polygon mode + const size_t backup = (SkCanvas::kPolygon_PointMode == mode); + + do { + int n = SkToInt(count); + if (n > MAX_DEV_PTS) { + n = MAX_DEV_PTS; + } + ctm.mapPoints(devPts, pts, n); + if (!SkScalarsAreFinite(&devPts[0].fX, n * 2)) { + return; + } + proc(rec, devPts, n, bltr); + pts += n - backup; + SkASSERT(SkToInt(count) >= n); + count -= n; + if (count > 0) { + count += backup; + } + } while (count != 0); + } else { + this->drawDevicePoints(mode, count, pts, paint, device); + } +} + +static bool clipped_out(const SkMatrix& m, const SkRasterClip& c, + const SkRect& srcR) { + SkRect dstR; + m.mapRect(&dstR, srcR); + return c.quickReject(dstR.roundOut()); +} + +static bool clipped_out(const SkMatrix& matrix, const SkRasterClip& clip, + int width, int height) { + SkRect r; + r.setIWH(width, height); + return clipped_out(matrix, clip, r); +} + +static bool clipHandlesSprite(const SkRasterClip& clip, int x, int y, const SkPixmap& pmap) { + return clip.isBW() || clip.quickContains(SkIRect::MakeXYWH(x, y, pmap.width(), pmap.height())); +} + +void SkDraw::drawBitmap(const SkBitmap& bitmap, const SkMatrix& prematrix, + const SkRect* dstBounds, const SkSamplingOptions& sampling, + const SkPaint& origPaint) const { + SkDEBUGCODE(this->validate();) + + // nothing to draw + if (fRC->isEmpty() || + bitmap.width() == 0 || bitmap.height() == 0 || + bitmap.colorType() == kUnknown_SkColorType) { + return; + } + + SkTCopyOnFirstWrite paint(origPaint); + if (origPaint.getStyle() != SkPaint::kFill_Style) { + paint.writable()->setStyle(SkPaint::kFill_Style); + } + + SkPreConcatMatrixProvider matrixProvider(*fMatrixProvider, prematrix); + SkMatrix matrix = matrixProvider.localToDevice(); + + if (clipped_out(matrix, *fRC, bitmap.width(), bitmap.height())) { + return; + } + + if (!SkColorTypeIsAlphaOnly(bitmap.colorType()) && + SkTreatAsSprite(matrix, bitmap.dimensions(), sampling, paint->isAntiAlias())) { + // + // It is safe to call lock pixels now, since we know the matrix is + // (more or less) identity. + // + SkPixmap pmap; + if (!bitmap.peekPixels(&pmap)) { + return; + } + int ix = SkScalarRoundToInt(matrix.getTranslateX()); + int iy = SkScalarRoundToInt(matrix.getTranslateY()); + if (clipHandlesSprite(*fRC, ix, iy, pmap)) { + SkSTArenaAlloc allocator; + // blitter will be owned by the allocator. + SkBlitter* blitter = SkBlitter::ChooseSprite(fDst, *paint, pmap, ix, iy, &allocator, + fRC->clipShader()); + if (blitter) { + SkScan::FillIRect(SkIRect::MakeXYWH(ix, iy, pmap.width(), pmap.height()), + *fRC, blitter); + return; + } + // if !blitter, then we fall-through to the slower case + } + } + + // now make a temp draw on the stack, and use it + // + SkDraw draw(*this); + draw.fMatrixProvider = &matrixProvider; + + // For a long time, the CPU backend treated A8 bitmaps as coverage, rather than alpha. This was + // inconsistent with the GPU backend (skbug.com/9692). When this was fixed, it altered behavior + // for some Android apps (b/231400686). Thus: keep the old behavior in the framework. +#if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) + if (bitmap.colorType() == kAlpha_8_SkColorType && !paint->getColorFilter()) { + draw.drawBitmapAsMask(bitmap, sampling, *paint); + return; + } +#endif + + SkPaint paintWithShader = make_paint_with_image(*paint, bitmap, sampling); + const SkRect srcBounds = SkRect::MakeIWH(bitmap.width(), bitmap.height()); + if (dstBounds) { + this->drawRect(srcBounds, paintWithShader, &prematrix, dstBounds); + } else { + draw.drawRect(srcBounds, paintWithShader); + } +} + +void SkDraw::drawSprite(const SkBitmap& bitmap, int x, int y, const SkPaint& origPaint) const { + SkDEBUGCODE(this->validate();) + + // nothing to draw + if (fRC->isEmpty() || + bitmap.width() == 0 || bitmap.height() == 0 || + bitmap.colorType() == kUnknown_SkColorType) { + return; + } + + const SkIRect bounds = SkIRect::MakeXYWH(x, y, bitmap.width(), bitmap.height()); + + if (fRC->quickReject(bounds)) { + return; // nothing to draw + } + + SkPaint paint(origPaint); + paint.setStyle(SkPaint::kFill_Style); + + SkPixmap pmap; + if (!bitmap.peekPixels(&pmap)) { + return; + } + + if (nullptr == paint.getColorFilter() && clipHandlesSprite(*fRC, x, y, pmap)) { + // blitter will be owned by the allocator. + SkSTArenaAlloc allocator; + SkBlitter* blitter = SkBlitter::ChooseSprite(fDst, paint, pmap, x, y, &allocator, + fRC->clipShader()); + if (blitter) { + SkScan::FillIRect(bounds, *fRC, blitter); + return; + } + } + + SkMatrix matrix; + SkRect r; + + // get a scalar version of our rect + r.set(bounds); + + // create shader with offset + matrix.setTranslate(r.fLeft, r.fTop); + SkPaint paintWithShader = make_paint_with_image(paint, bitmap, SkSamplingOptions(), &matrix); + SkDraw draw(*this); + SkMatrixProvider matrixProvider(SkMatrix::I()); + draw.fMatrixProvider = &matrixProvider; + // call ourself with a rect + draw.drawRect(r, paintWithShader); +} + +#if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) +void SkDraw::drawDevMask(const SkMask& srcM, const SkPaint& paint) const { + if (srcM.fBounds.isEmpty()) { + return; + } + + const SkMask* mask = &srcM; + + SkMask dstM; + if (paint.getMaskFilter() && + as_MFB(paint.getMaskFilter()) + ->filterMask(&dstM, srcM, fMatrixProvider->localToDevice(), nullptr)) { + mask = &dstM; + } + SkAutoMaskFreeImage ami(dstM.fImage); + + SkAutoBlitterChoose blitterChooser(*this, nullptr, paint); + SkBlitter* blitter = blitterChooser.get(); + + SkAAClipBlitterWrapper wrapper; + const SkRegion* clipRgn; + + if (fRC->isBW()) { + clipRgn = &fRC->bwRgn(); + } else { + wrapper.init(*fRC, blitter); + clipRgn = &wrapper.getRgn(); + blitter = wrapper.getBlitter(); + } + blitter->blitMaskRegion(*mask, *clipRgn); +} + +void SkDraw::drawBitmapAsMask(const SkBitmap& bitmap, const SkSamplingOptions& sampling, + const SkPaint& paint) const { + SkASSERT(bitmap.colorType() == kAlpha_8_SkColorType); + + // nothing to draw + if (fRC->isEmpty()) { + return; + } + + SkMatrix ctm = fMatrixProvider->localToDevice(); + if (SkTreatAsSprite(ctm, bitmap.dimensions(), sampling, paint.isAntiAlias())) + { + int ix = SkScalarRoundToInt(ctm.getTranslateX()); + int iy = SkScalarRoundToInt(ctm.getTranslateY()); + + SkPixmap pmap; + if (!bitmap.peekPixels(&pmap)) { + return; + } + SkMask mask; + mask.fBounds.setXYWH(ix, iy, pmap.width(), pmap.height()); + mask.fFormat = SkMask::kA8_Format; + mask.fRowBytes = SkToU32(pmap.rowBytes()); + // fImage is typed as writable, but in this case it is used read-only + mask.fImage = (uint8_t*)pmap.addr8(0, 0); + + this->drawDevMask(mask, paint); + } else { // need to xform the bitmap first + SkRect r; + SkMask mask; + + r.setIWH(bitmap.width(), bitmap.height()); + ctm.mapRect(&r); + r.round(&mask.fBounds); + + // set the mask's bounds to the transformed bitmap-bounds, + // clipped to the actual device and further limited by the clip bounds + { + SkASSERT(fDst.bounds().contains(fRC->getBounds())); + SkIRect devBounds = fDst.bounds(); + devBounds.intersect(fRC->getBounds().makeOutset(1, 1)); + // need intersect(l, t, r, b) on irect + if (!mask.fBounds.intersect(devBounds)) { + return; + } + } + + mask.fFormat = SkMask::kA8_Format; + mask.fRowBytes = SkAlign4(mask.fBounds.width()); + size_t size = mask.computeImageSize(); + if (0 == size) { + // the mask is too big to allocated, draw nothing + return; + } + + // allocate (and clear) our temp buffer to hold the transformed bitmap + AutoTMalloc storage(size); + mask.fImage = storage.get(); + memset(mask.fImage, 0, size); + + // now draw our bitmap(src) into mask(dst), transformed by the matrix + { + SkBitmap device; + device.installPixels(SkImageInfo::MakeA8(mask.fBounds.width(), mask.fBounds.height()), + mask.fImage, mask.fRowBytes); + + SkCanvas c(device); + // need the unclipped top/left for the translate + c.translate(-SkIntToScalar(mask.fBounds.fLeft), + -SkIntToScalar(mask.fBounds.fTop)); + c.concat(ctm); + + // We can't call drawBitmap, or we'll infinitely recurse. Instead + // we manually build a shader and draw that into our new mask + SkPaint tmpPaint; + tmpPaint.setAntiAlias(paint.isAntiAlias()); + tmpPaint.setDither(paint.isDither()); + SkPaint paintWithShader = make_paint_with_image(tmpPaint, bitmap, sampling); + SkRect rr; + rr.setIWH(bitmap.width(), bitmap.height()); + c.drawRect(rr, paintWithShader); + } + this->drawDevMask(mask, paint); + } +} +#endif + diff --git a/gfx/skia/skia/src/core/SkDraw.h b/gfx/skia/skia/src/core/SkDraw.h new file mode 100644 index 0000000000..bdb3b999de --- /dev/null +++ b/gfx/skia/skia/src/core/SkDraw.h @@ -0,0 +1,79 @@ + +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkDraw_DEFINED +#define SkDraw_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "src/base/SkZip.h" +#include "src/core/SkDrawBase.h" +#include + +class SkArenaAlloc; +class SkBaseDevice; +class SkBitmap; +class SkBlender; +class SkGlyph; +class SkGlyphRunListPainterCPU; +class SkMatrix; +class SkPaint; +class SkVertices; +namespace sktext { class GlyphRunList; } +struct SkPoint3; +struct SkPoint; +struct SkRSXform; +struct SkRect; + + +// defaults to use SkBlitter::Choose() +class SkDraw : public SkDrawBase { +public: + SkDraw(); + + /* If dstOrNull is null, computes a dst by mapping the bitmap's bounds through the matrix. */ + void drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect* dstOrNull, + const SkSamplingOptions&, const SkPaint&) const override; + void drawSprite(const SkBitmap&, int x, int y, const SkPaint&) const; + void drawGlyphRunList(SkCanvas* canvas, + SkGlyphRunListPainterCPU* glyphPainter, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& paint) const; + + void paintMasks(SkZip accepted, const SkPaint& paint) const override; + + void drawPoints(SkCanvas::PointMode, size_t count, const SkPoint[], + const SkPaint&, SkBaseDevice*) const; + /* If skipColorXform, skips color conversion when assigning per-vertex colors */ + void drawVertices(const SkVertices*, + sk_sp, + const SkPaint&, + bool skipColorXform) const; + void drawAtlas(const SkRSXform[], const SkRect[], const SkColor[], int count, + sk_sp, const SkPaint&); + +#if defined(SK_SUPPORT_LEGACY_ALPHA_BITMAP_AS_COVERAGE) + void drawDevMask(const SkMask& mask, const SkPaint&) const; + void drawBitmapAsMask(const SkBitmap&, const SkSamplingOptions&, const SkPaint&) const; +#endif + +private: + void drawFixedVertices(const SkVertices* vertices, + sk_sp blender, + const SkPaint& paint, + const SkMatrix& ctmInverse, + const SkPoint* dev2, + const SkPoint3* dev3, + SkArenaAlloc* outerAlloc, + bool skipColorXform) const; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkDrawBase.cpp b/gfx/skia/skia/src/core/SkDrawBase.cpp new file mode 100644 index 0000000000..2aace4361b --- /dev/null +++ b/gfx/skia/skia/src/core/SkDrawBase.cpp @@ -0,0 +1,776 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPathUtils.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStrokeRec.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkTLazy.h" +#include "src/base/SkZip.h" +#include "src/core/SkAutoBlitterChoose.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkBlitter_A8.h" +#include "src/core/SkDevice.h" +#include "src/core/SkDrawBase.h" +#include "src/core/SkDrawProcs.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkPathEffectBase.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRectPriv.h" +#include "src/core/SkScan.h" +#include +#include +#include + +class SkBitmap; +class SkBlitter; +class SkGlyph; +class SkMaskFilter; + +using namespace skia_private; + +/////////////////////////////////////////////////////////////////////////////// + +SkDrawBase::SkDrawBase() {} + +bool SkDrawBase::computeConservativeLocalClipBounds(SkRect* localBounds) const { + if (fRC->isEmpty()) { + return false; + } + + SkMatrix inverse; + if (!fMatrixProvider->localToDevice().invert(&inverse)) { + return false; + } + + SkIRect devBounds = fRC->getBounds(); + // outset to have slop for antialasing and hairlines + devBounds.outset(1, 1); + inverse.mapRect(localBounds, SkRect::Make(devBounds)); + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkDrawBase::drawPaint(const SkPaint& paint) const { + SkDEBUGCODE(this->validate();) + + if (fRC->isEmpty()) { + return; + } + + SkIRect devRect; + devRect.setWH(fDst.width(), fDst.height()); + + SkAutoBlitterChoose blitter(*this, nullptr, paint); + SkScan::FillIRect(devRect, *fRC, blitter.get()); +} + +/////////////////////////////////////////////////////////////////////////////// + +static inline SkPoint compute_stroke_size(const SkPaint& paint, const SkMatrix& matrix) { + SkASSERT(matrix.rectStaysRect()); + SkASSERT(SkPaint::kFill_Style != paint.getStyle()); + + SkVector size; + SkPoint pt = { paint.getStrokeWidth(), paint.getStrokeWidth() }; + matrix.mapVectors(&size, &pt, 1); + return SkPoint::Make(SkScalarAbs(size.fX), SkScalarAbs(size.fY)); +} + +static bool easy_rect_join(const SkRect& rect, const SkPaint& paint, const SkMatrix& matrix, + SkPoint* strokeSize) { + if (rect.isEmpty() || SkPaint::kMiter_Join != paint.getStrokeJoin() || + paint.getStrokeMiter() < SK_ScalarSqrt2) { + return false; + } + + *strokeSize = compute_stroke_size(paint, matrix); + return true; +} + +SkDrawBase::RectType SkDrawBase::ComputeRectType(const SkRect& rect, + const SkPaint& paint, + const SkMatrix& matrix, + SkPoint* strokeSize) { + RectType rtype; + const SkScalar width = paint.getStrokeWidth(); + const bool zeroWidth = (0 == width); + SkPaint::Style style = paint.getStyle(); + + if ((SkPaint::kStrokeAndFill_Style == style) && zeroWidth) { + style = SkPaint::kFill_Style; + } + + if (paint.getPathEffect() || paint.getMaskFilter() || + !matrix.rectStaysRect() || SkPaint::kStrokeAndFill_Style == style) { + rtype = kPath_RectType; + } else if (SkPaint::kFill_Style == style) { + rtype = kFill_RectType; + } else if (zeroWidth) { + rtype = kHair_RectType; + } else if (easy_rect_join(rect, paint, matrix, strokeSize)) { + rtype = kStroke_RectType; + } else { + rtype = kPath_RectType; + } + return rtype; +} + +static const SkPoint* rect_points(const SkRect& r) { + return reinterpret_cast(&r); +} + +static SkPoint* rect_points(SkRect& r) { + return reinterpret_cast(&r); +} + +static void draw_rect_as_path(const SkDrawBase& orig, const SkRect& prePaintRect, + const SkPaint& paint, const SkMatrixProvider* matrixProvider) { + SkDrawBase draw(orig); + draw.fMatrixProvider = matrixProvider; + SkPath tmp; + tmp.addRect(prePaintRect); + tmp.setFillType(SkPathFillType::kWinding); + draw.drawPath(tmp, paint, nullptr, true); +} + +void SkDrawBase::drawRect(const SkRect& prePaintRect, const SkPaint& paint, + const SkMatrix* paintMatrix, const SkRect* postPaintRect) const { + SkDEBUGCODE(this->validate();) + + // nothing to draw + if (fRC->isEmpty()) { + return; + } + + const SkMatrixProvider* matrixProvider = fMatrixProvider; + SkTLazy preConcatMatrixProvider; + if (paintMatrix) { + SkASSERT(postPaintRect); + matrixProvider = preConcatMatrixProvider.init(*matrixProvider, *paintMatrix); + } else { + SkASSERT(!postPaintRect); + } + + SkMatrix ctm = fMatrixProvider->localToDevice(); + SkPoint strokeSize; + RectType rtype = ComputeRectType(prePaintRect, paint, ctm, &strokeSize); + + if (kPath_RectType == rtype) { + draw_rect_as_path(*this, prePaintRect, paint, matrixProvider); + return; + } + + SkRect devRect; + const SkRect& paintRect = paintMatrix ? *postPaintRect : prePaintRect; + // skip the paintMatrix when transforming the rect by the CTM + ctm.mapPoints(rect_points(devRect), rect_points(paintRect), 2); + devRect.sort(); + + // look for the quick exit, before we build a blitter + SkRect bbox = devRect; + if (paint.getStyle() != SkPaint::kFill_Style) { + // extra space for hairlines + if (paint.getStrokeWidth() == 0) { + bbox.outset(1, 1); + } else { + // For kStroke_RectType, strokeSize is already computed. + const SkPoint& ssize = (kStroke_RectType == rtype) + ? strokeSize + : compute_stroke_size(paint, ctm); + bbox.outset(SkScalarHalf(ssize.x()), SkScalarHalf(ssize.y())); + } + } + if (SkPathPriv::TooBigForMath(bbox)) { + return; + } + + if (!SkRectPriv::FitsInFixed(bbox) && rtype != kHair_RectType) { + draw_rect_as_path(*this, prePaintRect, paint, matrixProvider); + return; + } + + SkIRect ir = bbox.roundOut(); + if (fRC->quickReject(ir)) { + return; + } + + SkAutoBlitterChoose blitterStorage(*this, matrixProvider, paint); + const SkRasterClip& clip = *fRC; + SkBlitter* blitter = blitterStorage.get(); + + // we want to "fill" if we are kFill or kStrokeAndFill, since in the latter + // case we are also hairline (if we've gotten to here), which devolves to + // effectively just kFill + switch (rtype) { + case kFill_RectType: + if (paint.isAntiAlias()) { + SkScan::AntiFillRect(devRect, clip, blitter); + } else { + SkScan::FillRect(devRect, clip, blitter); + } + break; + case kStroke_RectType: + if (paint.isAntiAlias()) { + SkScan::AntiFrameRect(devRect, strokeSize, clip, blitter); + } else { + SkScan::FrameRect(devRect, strokeSize, clip, blitter); + } + break; + case kHair_RectType: + if (paint.isAntiAlias()) { + SkScan::AntiHairRect(devRect, clip, blitter); + } else { + SkScan::HairRect(devRect, clip, blitter); + } + break; + default: + SkDEBUGFAIL("bad rtype"); + } +} + +static SkScalar fast_len(const SkVector& vec) { + SkScalar x = SkScalarAbs(vec.fX); + SkScalar y = SkScalarAbs(vec.fY); + if (x < y) { + using std::swap; + swap(x, y); + } + return x + SkScalarHalf(y); +} + +bool SkDrawTreatAAStrokeAsHairline(SkScalar strokeWidth, const SkMatrix& matrix, + SkScalar* coverage) { + SkASSERT(strokeWidth > 0); + // We need to try to fake a thick-stroke with a modulated hairline. + + if (matrix.hasPerspective()) { + return false; + } + + SkVector src[2], dst[2]; + src[0].set(strokeWidth, 0); + src[1].set(0, strokeWidth); + matrix.mapVectors(dst, src, 2); + SkScalar len0 = fast_len(dst[0]); + SkScalar len1 = fast_len(dst[1]); + if (len0 <= SK_Scalar1 && len1 <= SK_Scalar1) { + if (coverage) { + *coverage = SkScalarAve(len0, len1); + } + return true; + } + return false; +} + +void SkDrawBase::drawRRect(const SkRRect& rrect, const SkPaint& paint) const { + SkDEBUGCODE(this->validate()); + + if (fRC->isEmpty()) { + return; + } + + SkMatrix ctm = fMatrixProvider->localToDevice(); + { + // TODO: Investigate optimizing these options. They are in the same + // order as SkDrawBase::drawPath, which handles each case. It may be + // that there is no way to optimize for these using the SkRRect path. + SkScalar coverage; + if (SkDrawTreatAsHairline(paint, ctm, &coverage)) { + goto DRAW_PATH; + } + + if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) { + goto DRAW_PATH; + } + } + + if (paint.getMaskFilter()) { + // Transform the rrect into device space. + SkRRect devRRect; + if (rrect.transform(ctm, &devRRect)) { + SkAutoBlitterChoose blitter(*this, nullptr, paint); + if (as_MFB(paint.getMaskFilter())->filterRRect(devRRect, ctm, *fRC, blitter.get())) { + return; // filterRRect() called the blitter, so we're done + } + } + } + +DRAW_PATH: + // Now fall back to the default case of using a path. + SkPath path; + path.addRRect(rrect); + this->drawPath(path, paint, nullptr, true); +} + +void SkDrawBase::drawDevPath(const SkPath& devPath, const SkPaint& paint, bool drawCoverage, + SkBlitter* customBlitter, bool doFill) const { + if (SkPathPriv::TooBigForMath(devPath)) { + return; + } + SkBlitter* blitter = nullptr; + SkAutoBlitterChoose blitterStorage; + if (nullptr == customBlitter) { + blitter = blitterStorage.choose(*this, nullptr, paint, drawCoverage); + } else { + blitter = customBlitter; + } + + if (paint.getMaskFilter()) { + SkStrokeRec::InitStyle style = doFill ? SkStrokeRec::kFill_InitStyle + : SkStrokeRec::kHairline_InitStyle; + if (as_MFB(paint.getMaskFilter()) + ->filterPath(devPath, fMatrixProvider->localToDevice(), *fRC, blitter, style)) { + return; // filterPath() called the blitter, so we're done + } + } + + void (*proc)(const SkPath&, const SkRasterClip&, SkBlitter*); + if (doFill) { + if (paint.isAntiAlias()) { + proc = SkScan::AntiFillPath; + } else { + proc = SkScan::FillPath; + } + } else { // hairline + if (paint.isAntiAlias()) { + switch (paint.getStrokeCap()) { + case SkPaint::kButt_Cap: + proc = SkScan::AntiHairPath; + break; + case SkPaint::kSquare_Cap: + proc = SkScan::AntiHairSquarePath; + break; + case SkPaint::kRound_Cap: + proc = SkScan::AntiHairRoundPath; + break; + } + } else { + switch (paint.getStrokeCap()) { + case SkPaint::kButt_Cap: + proc = SkScan::HairPath; + break; + case SkPaint::kSquare_Cap: + proc = SkScan::HairSquarePath; + break; + case SkPaint::kRound_Cap: + proc = SkScan::HairRoundPath; + break; + } + } + } + + proc(devPath, *fRC, blitter); +} + +void SkDrawBase::drawPath(const SkPath& origSrcPath, const SkPaint& origPaint, + const SkMatrix* prePathMatrix, bool pathIsMutable, + bool drawCoverage, SkBlitter* customBlitter) const { + SkDEBUGCODE(this->validate();) + + // nothing to draw + if (fRC->isEmpty()) { + return; + } + + SkPath* pathPtr = (SkPath*)&origSrcPath; + bool doFill = true; + SkPath tmpPathStorage; + SkPath* tmpPath = &tmpPathStorage; + const SkMatrixProvider* matrixProvider = fMatrixProvider; + SkTLazy preConcatMatrixProvider; + tmpPath->setIsVolatile(true); + + if (prePathMatrix) { + if (origPaint.getPathEffect() || origPaint.getStyle() != SkPaint::kFill_Style) { + SkPath* result = pathPtr; + + if (!pathIsMutable) { + result = tmpPath; + pathIsMutable = true; + } + pathPtr->transform(*prePathMatrix, result); + pathPtr = result; + } else { + matrixProvider = preConcatMatrixProvider.init(*matrixProvider, *prePathMatrix); + } + } + + SkTCopyOnFirstWrite paint(origPaint); + + { + SkScalar coverage; + if (SkDrawTreatAsHairline(origPaint, matrixProvider->localToDevice(), &coverage)) { + const auto bm = origPaint.asBlendMode(); + if (SK_Scalar1 == coverage) { + paint.writable()->setStrokeWidth(0); + } else if (bm && SkBlendMode_SupportsCoverageAsAlpha(bm.value())) { + U8CPU newAlpha; +#if 0 + newAlpha = SkToU8(SkScalarRoundToInt(coverage * + origPaint.getAlpha())); +#else + // this is the old technique, which we preserve for now so + // we don't change previous results (testing) + // the new way seems fine, its just (a tiny bit) different + int scale = (int)(coverage * 256); + newAlpha = origPaint.getAlpha() * scale >> 8; +#endif + SkPaint* writablePaint = paint.writable(); + writablePaint->setStrokeWidth(0); + writablePaint->setAlpha(newAlpha); + } + } + } + + if (paint->getPathEffect() || paint->getStyle() != SkPaint::kFill_Style) { + SkRect cullRect; + const SkRect* cullRectPtr = nullptr; + if (this->computeConservativeLocalClipBounds(&cullRect)) { + cullRectPtr = &cullRect; + } + doFill = skpathutils::FillPathWithPaint(*pathPtr, *paint, tmpPath, cullRectPtr, + fMatrixProvider->localToDevice()); + pathPtr = tmpPath; + } + + // avoid possibly allocating a new path in transform if we can + SkPath* devPathPtr = pathIsMutable ? pathPtr : tmpPath; + + // transform the path into device space + pathPtr->transform(matrixProvider->localToDevice(), devPathPtr); + +#if defined(SK_BUILD_FOR_FUZZER) + if (devPathPtr->countPoints() > 1000) { + return; + } +#endif + + this->drawDevPath(*devPathPtr, *paint, drawCoverage, customBlitter, doFill); +} + +void SkDrawBase::paintMasks(SkZip, const SkPaint&) const { + SkASSERT(false); +} +void SkDrawBase::drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect*, + const SkSamplingOptions&, const SkPaint&) const { + SkASSERT(false); +} + +//////////////////////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG + +void SkDrawBase::validate() const { + SkASSERT(fMatrixProvider != nullptr); + SkASSERT(fRC != nullptr); + + const SkIRect& cr = fRC->getBounds(); + SkIRect br; + + br.setWH(fDst.width(), fDst.height()); + SkASSERT(cr.isEmpty() || br.contains(cr)); +} + +#endif + +//////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkDrawBase::ComputeMaskBounds(const SkRect& devPathBounds, const SkIRect& clipBounds, + const SkMaskFilter* filter, const SkMatrix* filterMatrix, + SkIRect* bounds) { + // init our bounds from the path + *bounds = devPathBounds.makeOutset(SK_ScalarHalf, SK_ScalarHalf).roundOut(); + + SkIPoint margin = SkIPoint::Make(0, 0); + if (filter) { + SkASSERT(filterMatrix); + + SkMask srcM, dstM; + + srcM.fBounds = *bounds; + srcM.fFormat = SkMask::kA8_Format; + if (!as_MFB(filter)->filterMask(&dstM, srcM, *filterMatrix, &margin)) { + return false; + } + } + + // trim the bounds to reflect the clip (plus whatever slop the filter needs) + // Ugh. Guard against gigantic margins from wacky filters. Without this + // check we can request arbitrary amounts of slop beyond our visible + // clip, and bring down the renderer (at least on finite RAM machines + // like handsets, etc.). Need to balance this invented value between + // quality of large filters like blurs, and the corresponding memory + // requests. + static constexpr int kMaxMargin = 128; + if (!bounds->intersect(clipBounds.makeOutset(std::min(margin.fX, kMaxMargin), + std::min(margin.fY, kMaxMargin)))) { + return false; + } + + return true; +} + +static void draw_into_mask(const SkMask& mask, const SkPath& devPath, + SkStrokeRec::InitStyle style) { + SkDrawBase draw; + draw.fBlitterChooser = SkA8Blitter_Choose; + if (!draw.fDst.reset(mask)) { + return; + } + + SkRasterClip clip; + SkMatrix matrix; + SkPaint paint; + + clip.setRect(SkIRect::MakeWH(mask.fBounds.width(), mask.fBounds.height())); + matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft), + -SkIntToScalar(mask.fBounds.fTop)); + + SkMatrixProvider matrixProvider(matrix); + draw.fRC = &clip; + draw.fMatrixProvider = &matrixProvider; + paint.setAntiAlias(true); + switch (style) { + case SkStrokeRec::kHairline_InitStyle: + SkASSERT(!paint.getStrokeWidth()); + paint.setStyle(SkPaint::kStroke_Style); + break; + case SkStrokeRec::kFill_InitStyle: + SkASSERT(paint.getStyle() == SkPaint::kFill_Style); + break; + + } + draw.drawPath(devPath, paint); +} + +bool SkDrawBase::DrawToMask(const SkPath& devPath, const SkIRect& clipBounds, + const SkMaskFilter* filter, const SkMatrix* filterMatrix, + SkMask* mask, SkMask::CreateMode mode, + SkStrokeRec::InitStyle style) { + if (devPath.isEmpty()) { + return false; + } + + if (SkMask::kJustRenderImage_CreateMode != mode) { + // By using infinite bounds for inverse fills, ComputeMaskBounds is able to clip it to + // 'clipBounds' outset by whatever extra margin the mask filter requires. + static const SkRect kInverseBounds = { SK_ScalarNegativeInfinity, SK_ScalarNegativeInfinity, + SK_ScalarInfinity, SK_ScalarInfinity}; + SkRect pathBounds = devPath.isInverseFillType() ? kInverseBounds + : devPath.getBounds(); + if (!ComputeMaskBounds(pathBounds, clipBounds, filter, + filterMatrix, &mask->fBounds)) + return false; + } + + if (SkMask::kComputeBoundsAndRenderImage_CreateMode == mode) { + mask->fFormat = SkMask::kA8_Format; + mask->fRowBytes = mask->fBounds.width(); + size_t size = mask->computeImageSize(); + if (0 == size) { + // we're too big to allocate the mask, abort + return false; + } + mask->fImage = SkMask::AllocImage(size, SkMask::kZeroInit_Alloc); + } + + if (SkMask::kJustComputeBounds_CreateMode != mode) { + draw_into_mask(*mask, devPath, style); + } + + return true; +} + +void SkDrawBase::drawDevicePoints(SkCanvas::PointMode mode, size_t count, + const SkPoint pts[], const SkPaint& paint, + SkBaseDevice* device) const { + // if we're in lines mode, force count to be even + if (SkCanvas::kLines_PointMode == mode) { + count &= ~(size_t)1; + } + + SkASSERT(pts != nullptr); + SkDEBUGCODE(this->validate();) + + // nothing to draw + if (!count || fRC->isEmpty()) { + return; + } + + // needed? + if (!SkScalarsAreFinite(&pts[0].fX, count * 2)) { + return; + } + + SkMatrix ctm = fMatrixProvider->localToDevice(); + switch (mode) { + case SkCanvas::kPoints_PointMode: { + // temporarily mark the paint as filling. + SkPaint newPaint(paint); + newPaint.setStyle(SkPaint::kFill_Style); + + SkScalar width = newPaint.getStrokeWidth(); + SkScalar radius = SkScalarHalf(width); + + if (newPaint.getStrokeCap() == SkPaint::kRound_Cap) { + if (device) { + for (size_t i = 0; i < count; ++i) { + SkRect r = SkRect::MakeLTRB(pts[i].fX - radius, pts[i].fY - radius, + pts[i].fX + radius, pts[i].fY + radius); + device->drawOval(r, newPaint); + } + } else { + SkPath path; + SkMatrix preMatrix; + + path.addCircle(0, 0, radius); + for (size_t i = 0; i < count; i++) { + preMatrix.setTranslate(pts[i].fX, pts[i].fY); + // pass true for the last point, since we can modify + // then path then + path.setIsVolatile((count-1) == i); + this->drawPath(path, newPaint, &preMatrix, (count-1) == i); + } + } + } else { + SkRect r; + + for (size_t i = 0; i < count; i++) { + r.fLeft = pts[i].fX - radius; + r.fTop = pts[i].fY - radius; + r.fRight = r.fLeft + width; + r.fBottom = r.fTop + width; + if (device) { + device->drawRect(r, newPaint); + } else { + this->drawRect(r, newPaint); + } + } + } + break; + } + case SkCanvas::kLines_PointMode: + if (2 == count && paint.getPathEffect()) { + // most likely a dashed line - see if it is one of the ones + // we can accelerate + SkStrokeRec stroke(paint); + SkPathEffectBase::PointData pointData; + + SkPath path = SkPath::Line(pts[0], pts[1]); + + SkRect cullRect = SkRect::Make(fRC->getBounds()); + + if (as_PEB(paint.getPathEffect())->asPoints(&pointData, path, stroke, ctm, + &cullRect)) { + // 'asPoints' managed to find some fast path + + SkPaint newP(paint); + newP.setPathEffect(nullptr); + newP.setStyle(SkPaint::kFill_Style); + + if (!pointData.fFirst.isEmpty()) { + if (device) { + device->drawPath(pointData.fFirst, newP); + } else { + this->drawPath(pointData.fFirst, newP); + } + } + + if (!pointData.fLast.isEmpty()) { + if (device) { + device->drawPath(pointData.fLast, newP); + } else { + this->drawPath(pointData.fLast, newP); + } + } + + if (pointData.fSize.fX == pointData.fSize.fY) { + // The rest of the dashed line can just be drawn as points + SkASSERT(pointData.fSize.fX == SkScalarHalf(newP.getStrokeWidth())); + + if (SkPathEffectBase::PointData::kCircles_PointFlag & pointData.fFlags) { + newP.setStrokeCap(SkPaint::kRound_Cap); + } else { + newP.setStrokeCap(SkPaint::kButt_Cap); + } + + if (device) { + device->drawPoints(SkCanvas::kPoints_PointMode, + pointData.fNumPoints, + pointData.fPoints, + newP); + } else { + this->drawDevicePoints(SkCanvas::kPoints_PointMode, + pointData.fNumPoints, + pointData.fPoints, + newP, + device); + } + break; + } else { + // The rest of the dashed line must be drawn as rects + SkASSERT(!(SkPathEffectBase::PointData::kCircles_PointFlag & + pointData.fFlags)); + + SkRect r; + + for (int i = 0; i < pointData.fNumPoints; ++i) { + r.setLTRB(pointData.fPoints[i].fX - pointData.fSize.fX, + pointData.fPoints[i].fY - pointData.fSize.fY, + pointData.fPoints[i].fX + pointData.fSize.fX, + pointData.fPoints[i].fY + pointData.fSize.fY); + if (device) { + device->drawRect(r, newP); + } else { + this->drawRect(r, newP); + } + } + } + + break; + } + } + [[fallthrough]]; // couldn't take fast path + case SkCanvas::kPolygon_PointMode: { + count -= 1; + SkPath path; + SkPaint p(paint); + p.setStyle(SkPaint::kStroke_Style); + size_t inc = (SkCanvas::kLines_PointMode == mode) ? 2 : 1; + path.setIsVolatile(true); + for (size_t i = 0; i < count; i += inc) { + path.moveTo(pts[i]); + path.lineTo(pts[i+1]); + if (device) { + device->drawPath(path, p, true); + } else { + this->drawPath(path, p, nullptr, true); + } + path.rewind(); + } + break; + } + } +} + diff --git a/gfx/skia/skia/src/core/SkDrawBase.h b/gfx/skia/skia/src/core/SkDrawBase.h new file mode 100644 index 0000000000..6afa13738b --- /dev/null +++ b/gfx/skia/skia/src/core/SkDrawBase.h @@ -0,0 +1,166 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDrawBase_DEFINED +#define SkDrawBase_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkStrokeRec.h" +#include "include/private/base/SkAttributes.h" +#include "src/base/SkZip.h" +#include "src/core/SkGlyphRunPainter.h" +#include "src/core/SkMask.h" +#include + +class SkArenaAlloc; +class SkBaseDevice; +class SkBitmap; +class SkBlitter; +class SkGlyph; +class SkMaskFilter; +class SkMatrix; +class SkMatrixProvider; +class SkPath; +class SkRRect; +class SkRasterClip; +class SkShader; +class SkSurfaceProps; +struct SkIRect; +struct SkPoint; +struct SkRect; + +class SkDrawBase : public SkGlyphRunListPainterCPU::BitmapDevicePainter { +public: + SkDrawBase(); + + void drawPaint(const SkPaint&) const; + void drawRect(const SkRect& prePaintRect, const SkPaint&, const SkMatrix* paintMatrix, + const SkRect* postPaintRect) const; + void drawRect(const SkRect& rect, const SkPaint& paint) const { + this->drawRect(rect, paint, nullptr, nullptr); + } + void drawRRect(const SkRRect&, const SkPaint&) const; + /** + * To save on mallocs, we allow a flag that tells us that srcPath is + * mutable, so that we don't have to make copies of it as we transform it. + * + * If prePathMatrix is not null, it should logically be applied before any + * stroking or other effects. If there are no effects on the paint that + * affect the geometry/rasterization, then the pre matrix can just be + * pre-concated with the current matrix. + */ + void drawPath(const SkPath& path, const SkPaint& paint, + const SkMatrix* prePathMatrix = nullptr, bool pathIsMutable = false) const { + this->drawPath(path, paint, prePathMatrix, pathIsMutable, false); + } + + /** + * Overwrite the target with the path's coverage (i.e. its mask). + * Will overwrite the entire device, so it need not be zero'd first. + * + * Only device A8 is supported right now. + */ + void drawPathCoverage(const SkPath& src, const SkPaint& paint, + SkBlitter* customBlitter = nullptr) const { + bool isHairline = paint.getStyle() == SkPaint::kStroke_Style && + paint.getStrokeWidth() > 0; + this->drawPath(src, paint, nullptr, false, !isHairline, customBlitter); + } + + void drawDevicePoints(SkCanvas::PointMode, size_t count, const SkPoint[], const SkPaint&, + SkBaseDevice*) const; + + static bool ComputeMaskBounds(const SkRect& devPathBounds, const SkIRect& clipBounds, + const SkMaskFilter* filter, const SkMatrix* filterMatrix, + SkIRect* bounds); + + /** Helper function that creates a mask from a path and an optional maskfilter. + Note however, that the resulting mask will not have been actually filtered, + that must be done afterwards (by calling filterMask). The maskfilter is provided + solely to assist in computing the mask's bounds (if the mode requests that). + */ + static bool DrawToMask(const SkPath& devPath, const SkIRect& clipBounds, + const SkMaskFilter*, const SkMatrix* filterMatrix, + SkMask* mask, SkMask::CreateMode mode, + SkStrokeRec::InitStyle style); + + enum RectType { + kHair_RectType, + kFill_RectType, + kStroke_RectType, + kPath_RectType + }; + + /** + * Based on the paint's style, strokeWidth, and the matrix, classify how + * to draw the rect. If no special-case is available, returns + * kPath_RectType. + * + * Iff RectType == kStroke_RectType, then strokeSize is set to the device + * width and height of the stroke. + */ + static RectType ComputeRectType(const SkRect&, const SkPaint&, const SkMatrix&, + SkPoint* strokeSize); + + using BlitterChooser = SkBlitter* (const SkPixmap& dst, + const SkMatrix& ctm, + const SkPaint&, + SkArenaAlloc*, + bool drawCoverage, + sk_sp clipShader, + const SkSurfaceProps&); + + +private: + // not supported + void paintMasks(SkZip accepted, const SkPaint& paint) const override; + void drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect* dstOrNull, + const SkSamplingOptions&, const SkPaint&) const override; + + void drawPath(const SkPath&, + const SkPaint&, + const SkMatrix* preMatrix, + bool pathIsMutable, + bool drawCoverage, + SkBlitter* customBlitter = nullptr) const; + + void drawLine(const SkPoint[2], const SkPaint&) const; + + void drawDevPath(const SkPath& devPath, + const SkPaint& paint, + bool drawCoverage, + SkBlitter* customBlitter, + bool doFill) const; + /** + * Return the current clip bounds, in local coordinates, with slop to account + * for antialiasing or hairlines (i.e. device-bounds outset by 1, and then + * run through the inverse of the matrix). + * + * If the matrix cannot be inverted, or the current clip is empty, return + * false and ignore bounds parameter. + */ + bool SK_WARN_UNUSED_RESULT computeConservativeLocalClipBounds(SkRect* bounds) const; + +public: + SkPixmap fDst; + BlitterChooser* fBlitterChooser{nullptr}; // required + const SkMatrixProvider* fMatrixProvider{nullptr}; // required + const SkRasterClip* fRC{nullptr}; // required + const SkSurfaceProps* fProps{nullptr}; // optional + +#ifdef SK_DEBUG + void validate() const; +#else + void validate() const {} +#endif +}; + +#endif // SkDrawBase_DEFINED diff --git a/gfx/skia/skia/src/core/SkDrawLooper.cpp b/gfx/skia/skia/src/core/SkDrawLooper.cpp new file mode 100644 index 0000000000..cf5cf343bf --- /dev/null +++ b/gfx/skia/skia/src/core/SkDrawLooper.cpp @@ -0,0 +1,110 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkRect.h" +#include "src/base/SkArenaAlloc.h" + +#ifdef SK_SUPPORT_LEGACY_DRAWLOOPER + +#include "include/core/SkDrawLooper.h" + +void SkDrawLooper::Context::Info::applyToCTM(SkMatrix* ctm) const { + if (fApplyPostCTM) { + ctm->postTranslate(fTranslate.fX, fTranslate.fY); + } else { + ctm->preTranslate(fTranslate.fX, fTranslate.fY); + } +} + +void SkDrawLooper::Context::Info::applyToCanvas(SkCanvas* canvas) const { + if (fApplyPostCTM) { + canvas->setMatrix(canvas->getLocalToDevice().postTranslate(fTranslate.fX, fTranslate.fY)); + } else { + canvas->translate(fTranslate.fX, fTranslate.fY); + } +} + +bool SkDrawLooper::canComputeFastBounds(const SkPaint& paint) const { + SkSTArenaAlloc<48> alloc; + + SkDrawLooper::Context* context = this->makeContext(&alloc); + for (;;) { + SkPaint p(paint); + SkDrawLooper::Context::Info info; + if (context->next(&info, &p)) { + if (!p.canComputeFastBounds()) { + return false; + } + } else { + break; + } + } + return true; +} + +void SkDrawLooper::computeFastBounds(const SkPaint& paint, const SkRect& s, + SkRect* dst) const { + // src and dst rects may alias and we need to keep the original src, so copy it. + const SkRect src = s; + + SkSTArenaAlloc<48> alloc; + + *dst = src; // catch case where there are no loops + SkDrawLooper::Context* context = this->makeContext(&alloc); + + for (bool firstTime = true;; firstTime = false) { + SkPaint p(paint); + SkDrawLooper::Context::Info info; + if (context->next(&info, &p)) { + SkRect r(src); + + p.computeFastBounds(r, &r); + r.offset(info.fTranslate.fX, info.fTranslate.fY); + + if (firstTime) { + *dst = r; + } else { + dst->join(r); + } + } else { + break; + } + } +} + +bool SkDrawLooper::asABlurShadow(BlurShadowRec*) const { + return false; +} + +void SkDrawLooper::apply(SkCanvas* canvas, const SkPaint& paint, + std::function proc) { + SkSTArenaAlloc<256> alloc; + Context* ctx = this->makeContext(&alloc); + if (ctx) { + Context::Info info; + for (;;) { + SkPaint p = paint; + if (!ctx->next(&info, &p)) { + break; + } + canvas->save(); + if (info.fApplyPostCTM) { + canvas->setMatrix(canvas->getLocalToDevice().postTranslate(info.fTranslate.fX, + info.fTranslate.fY)); + } else { + canvas->translate(info.fTranslate.fX, info.fTranslate.fY); + } + proc(canvas, p); + canvas->restore(); + } + } +} + +#endif diff --git a/gfx/skia/skia/src/core/SkDrawProcs.h b/gfx/skia/skia/src/core/SkDrawProcs.h new file mode 100644 index 0000000000..fc59f52ec8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDrawProcs.h @@ -0,0 +1,43 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDrawProcs_DEFINED +#define SkDrawProcs_DEFINED + +#include "include/core/SkPaint.h" +#include "include/core/SkScalar.h" +class SkMatrix; + +bool SkDrawTreatAAStrokeAsHairline(SkScalar strokeWidth, const SkMatrix&, + SkScalar* coverage); + +/** + * If the current paint is set to stroke and the stroke-width when applied to + * the matrix is <= 1.0, then this returns true, and sets coverage (simulating + * a stroke by drawing a hairline with partial coverage). If any of these + * conditions are false, then this returns false and coverage is ignored. + */ +inline bool SkDrawTreatAsHairline(const SkPaint& paint, const SkMatrix& matrix, + SkScalar* coverage) { + if (SkPaint::kStroke_Style != paint.getStyle()) { + return false; + } + + SkScalar strokeWidth = paint.getStrokeWidth(); + if (0 == strokeWidth) { + *coverage = SK_Scalar1; + return true; + } + + if (!paint.isAntiAlias()) { + return false; + } + + return SkDrawTreatAAStrokeAsHairline(strokeWidth, matrix, coverage); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkDrawShadowInfo.cpp b/gfx/skia/skia/src/core/SkDrawShadowInfo.cpp new file mode 100644 index 0000000000..3a84f6c294 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDrawShadowInfo.cpp @@ -0,0 +1,217 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkDrawShadowInfo.h" + +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkRect.h" +#include "include/private/SkShadowFlags.h" +#include "include/private/base/SkTo.h" + +namespace SkDrawShadowMetrics { + +static SkScalar compute_z(SkScalar x, SkScalar y, const SkPoint3& params) { + return x*params.fX + y*params.fY + params.fZ; +} + +bool GetSpotShadowTransform(const SkPoint3& lightPos, SkScalar lightRadius, + const SkMatrix& ctm, const SkPoint3& zPlaneParams, + const SkRect& pathBounds, bool directional, + SkMatrix* shadowTransform, SkScalar* radius) { + auto heightFunc = [zPlaneParams] (SkScalar x, SkScalar y) { + return zPlaneParams.fX*x + zPlaneParams.fY*y + zPlaneParams.fZ; + }; + SkScalar occluderHeight = heightFunc(pathBounds.centerX(), pathBounds.centerY()); + + // TODO: have directional lights support tilt via the zPlaneParams + if (!ctm.hasPerspective() || directional) { + SkScalar scale; + SkVector translate; + if (directional) { + SkDrawShadowMetrics::GetDirectionalParams(occluderHeight, lightPos.fX, lightPos.fY, + lightPos.fZ, lightRadius, radius, + &scale, &translate); + } else { + SkDrawShadowMetrics::GetSpotParams(occluderHeight, lightPos.fX, lightPos.fY, + lightPos.fZ, lightRadius, radius, + &scale, &translate); + } + shadowTransform->setScaleTranslate(scale, scale, translate.fX, translate.fY); + shadowTransform->preConcat(ctm); + } else { + if (SkScalarNearlyZero(pathBounds.width()) || SkScalarNearlyZero(pathBounds.height())) { + return false; + } + + // get rotated quad in 3D + SkPoint pts[4]; + ctm.mapRectToQuad(pts, pathBounds); + + SkPoint3 pts3D[4]; + SkScalar z = heightFunc(pathBounds.fLeft, pathBounds.fTop); + pts3D[0].set(pts[0].fX, pts[0].fY, z); + z = heightFunc(pathBounds.fRight, pathBounds.fTop); + pts3D[1].set(pts[1].fX, pts[1].fY, z); + z = heightFunc(pathBounds.fRight, pathBounds.fBottom); + pts3D[2].set(pts[2].fX, pts[2].fY, z); + z = heightFunc(pathBounds.fLeft, pathBounds.fBottom); + pts3D[3].set(pts[3].fX, pts[3].fY, z); + + // project from light through corners to z=0 plane + for (int i = 0; i < 4; ++i) { + SkScalar dz = lightPos.fZ - pts3D[i].fZ; + // light shouldn't be below or at a corner's z-location + if (dz <= SK_ScalarNearlyZero) { + return false; + } + SkScalar zRatio = pts3D[i].fZ / dz; + pts3D[i].fX -= (lightPos.fX - pts3D[i].fX)*zRatio; + pts3D[i].fY -= (lightPos.fY - pts3D[i].fY)*zRatio; + pts3D[i].fZ = SK_Scalar1; + } + + // Generate matrix that projects from [-1,1]x[-1,1] square to projected quad + SkPoint3 h0, h1, h2; + // Compute homogenous crossing point between top and bottom edges (gives new x-axis). + h0 = (pts3D[1].cross(pts3D[0])).cross(pts3D[2].cross(pts3D[3])); + // Compute homogenous crossing point between left and right edges (gives new y-axis). + h1 = (pts3D[0].cross(pts3D[3])).cross(pts3D[1].cross(pts3D[2])); + // Compute homogenous crossing point between diagonals (gives new origin). + h2 = (pts3D[0].cross(pts3D[2])).cross(pts3D[1].cross(pts3D[3])); + // If h2 is a vector (z=0 in 2D homogeneous space), that means that at least + // two of the quad corners are coincident and we don't have a realistic projection + if (SkScalarNearlyZero(h2.fZ)) { + return false; + } + // In some cases the crossing points are in the wrong direction + // to map (-1,-1) to pts3D[0], so we need to correct for that. + // Want h0 to be to the right of the left edge. + SkVector3 v = pts3D[3] - pts3D[0]; + SkVector3 w = h0 - pts3D[0]; + SkScalar perpDot = v.fX*w.fY - v.fY*w.fX; + if (perpDot > 0) { + h0 = -h0; + } + // Want h1 to be above the bottom edge. + v = pts3D[1] - pts3D[0]; + perpDot = v.fX*w.fY - v.fY*w.fX; + if (perpDot < 0) { + h1 = -h1; + } + shadowTransform->setAll(h0.fX / h2.fZ, h1.fX / h2.fZ, h2.fX / h2.fZ, + h0.fY / h2.fZ, h1.fY / h2.fZ, h2.fY / h2.fZ, + h0.fZ / h2.fZ, h1.fZ / h2.fZ, 1); + // generate matrix that transforms from bounds to [-1,1]x[-1,1] square + SkMatrix toHomogeneous; + SkScalar xScale = 2/(pathBounds.fRight - pathBounds.fLeft); + SkScalar yScale = 2/(pathBounds.fBottom - pathBounds.fTop); + toHomogeneous.setAll(xScale, 0, -xScale*pathBounds.fLeft - 1, + 0, yScale, -yScale*pathBounds.fTop - 1, + 0, 0, 1); + shadowTransform->preConcat(toHomogeneous); + + *radius = SkDrawShadowMetrics::SpotBlurRadius(occluderHeight, lightPos.fZ, lightRadius); + } + + return true; +} + +void GetLocalBounds(const SkPath& path, const SkDrawShadowRec& rec, const SkMatrix& ctm, + SkRect* bounds) { + SkRect ambientBounds = path.getBounds(); + SkScalar occluderZ; + if (SkScalarNearlyZero(rec.fZPlaneParams.fX) && SkScalarNearlyZero(rec.fZPlaneParams.fY)) { + occluderZ = rec.fZPlaneParams.fZ; + } else { + occluderZ = compute_z(ambientBounds.fLeft, ambientBounds.fTop, rec.fZPlaneParams); + occluderZ = std::max(occluderZ, compute_z(ambientBounds.fRight, ambientBounds.fTop, + rec.fZPlaneParams)); + occluderZ = std::max(occluderZ, compute_z(ambientBounds.fLeft, ambientBounds.fBottom, + rec.fZPlaneParams)); + occluderZ = std::max(occluderZ, compute_z(ambientBounds.fRight, ambientBounds.fBottom, + rec.fZPlaneParams)); + } + SkScalar ambientBlur; + SkScalar spotBlur; + SkScalar spotScale; + SkPoint spotOffset; + if (ctm.hasPerspective()) { + // transform ambient and spot bounds into device space + ctm.mapRect(&ambientBounds); + + // get ambient blur (in device space) + ambientBlur = SkDrawShadowMetrics::AmbientBlurRadius(occluderZ); + + // get spot params (in device space) + if (SkToBool(rec.fFlags & SkShadowFlags::kDirectionalLight_ShadowFlag)) { + SkDrawShadowMetrics::GetDirectionalParams(occluderZ, rec.fLightPos.fX, rec.fLightPos.fY, + rec.fLightPos.fZ, rec.fLightRadius, + &spotBlur, &spotScale, &spotOffset); + } else { + SkPoint devLightPos = SkPoint::Make(rec.fLightPos.fX, rec.fLightPos.fY); + ctm.mapPoints(&devLightPos, 1); + SkDrawShadowMetrics::GetSpotParams(occluderZ, devLightPos.fX, devLightPos.fY, + rec.fLightPos.fZ, rec.fLightRadius, + &spotBlur, &spotScale, &spotOffset); + } + } else { + SkScalar devToSrcScale = SkScalarInvert(ctm.getMinScale()); + + // get ambient blur (in local space) + SkScalar devSpaceAmbientBlur = SkDrawShadowMetrics::AmbientBlurRadius(occluderZ); + ambientBlur = devSpaceAmbientBlur*devToSrcScale; + + // get spot params (in local space) + if (SkToBool(rec.fFlags & SkShadowFlags::kDirectionalLight_ShadowFlag)) { + SkDrawShadowMetrics::GetDirectionalParams(occluderZ, rec.fLightPos.fX, rec.fLightPos.fY, + rec.fLightPos.fZ, rec.fLightRadius, + &spotBlur, &spotScale, &spotOffset); + // light dir is in device space, so need to map spot offset back into local space + SkMatrix inverse; + if (ctm.invert(&inverse)) { + inverse.mapVectors(&spotOffset, 1); + } + } else { + SkDrawShadowMetrics::GetSpotParams(occluderZ, rec.fLightPos.fX, rec.fLightPos.fY, + rec.fLightPos.fZ, rec.fLightRadius, + &spotBlur, &spotScale, &spotOffset); + } + + // convert spot blur to local space + spotBlur *= devToSrcScale; + } + + // in both cases, adjust ambient and spot bounds + SkRect spotBounds = ambientBounds; + ambientBounds.outset(ambientBlur, ambientBlur); + spotBounds.fLeft *= spotScale; + spotBounds.fTop *= spotScale; + spotBounds.fRight *= spotScale; + spotBounds.fBottom *= spotScale; + spotBounds.offset(spotOffset.fX, spotOffset.fY); + spotBounds.outset(spotBlur, spotBlur); + + // merge bounds + *bounds = ambientBounds; + bounds->join(spotBounds); + // outset a bit to account for floating point error + bounds->outset(1, 1); + + // if perspective, transform back to src space + if (ctm.hasPerspective()) { + // TODO: create tighter mapping from dev rect back to src rect + SkMatrix inverse; + if (ctm.invert(&inverse)) { + inverse.mapRect(bounds); + } + } +} + + +} // namespace SkDrawShadowMetrics + diff --git a/gfx/skia/skia/src/core/SkDrawShadowInfo.h b/gfx/skia/skia/src/core/SkDrawShadowInfo.h new file mode 100644 index 0000000000..d0957cc6a6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDrawShadowInfo.h @@ -0,0 +1,96 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDrawShadowInfo_DEFINED +#define SkDrawShadowInfo_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkPoint.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTPin.h" + +#include +#include + +class SkMatrix; +class SkPath; +struct SkRect; + +struct SkDrawShadowRec { + SkPoint3 fZPlaneParams; + SkPoint3 fLightPos; + SkScalar fLightRadius; + SkColor fAmbientColor; + SkColor fSpotColor; + uint32_t fFlags; +}; + +namespace SkDrawShadowMetrics { + +static constexpr auto kAmbientHeightFactor = 1.0f / 128.0f; +static constexpr auto kAmbientGeomFactor = 64.0f; +// Assuming that we have a light height of 600 for the spot shadow, +// the spot values will reach their maximum at a height of approximately 292.3077. +// We'll round up to 300 to keep it simple. +static constexpr auto kMaxAmbientRadius = 300*kAmbientHeightFactor*kAmbientGeomFactor; + +static inline float divide_and_pin(float numer, float denom, float min, float max) { + float result = SkTPin(sk_ieee_float_divide(numer, denom), min, max); + // ensure that SkTPin handled non-finites correctly + SkASSERT(result >= min && result <= max); + return result; +} + +inline SkScalar AmbientBlurRadius(SkScalar height) { + return std::min(height*kAmbientHeightFactor*kAmbientGeomFactor, kMaxAmbientRadius); +} + +inline SkScalar AmbientRecipAlpha(SkScalar height) { + return 1.0f + std::max(height*kAmbientHeightFactor, 0.0f); +} + +inline SkScalar SpotBlurRadius(SkScalar occluderZ, SkScalar lightZ, SkScalar lightRadius) { + return lightRadius*divide_and_pin(occluderZ, lightZ - occluderZ, 0.0f, 0.95f); +} + +inline void GetSpotParams(SkScalar occluderZ, SkScalar lightX, SkScalar lightY, SkScalar lightZ, + SkScalar lightRadius, + SkScalar* blurRadius, SkScalar* scale, SkVector* translate) { + SkScalar zRatio = divide_and_pin(occluderZ, lightZ - occluderZ, 0.0f, 0.95f); + *blurRadius = lightRadius*zRatio; + *scale = divide_and_pin(lightZ, lightZ - occluderZ, 1.0f, 1.95f); + *translate = SkVector::Make(-zRatio * lightX, -zRatio * lightY); +} + +inline void GetDirectionalParams(SkScalar occluderZ, SkScalar lightX, SkScalar lightY, + SkScalar lightZ, SkScalar lightRadius, + SkScalar* blurRadius, SkScalar* scale, SkVector* translate) { + *blurRadius = lightRadius*occluderZ; + *scale = 1; + // Max z-ratio is "max expected elevation"/"min allowable z" + constexpr SkScalar kMaxZRatio = 64/SK_ScalarNearlyZero; + SkScalar zRatio = divide_and_pin(occluderZ, lightZ, 0.0f, kMaxZRatio); + *translate = SkVector::Make(-zRatio * lightX, -zRatio * lightY); +} + +// Create the transformation to apply to a path to get its base shadow outline, given the light +// parameters and the path's 3D transformation (given by ctm and zPlaneParams). +// Also computes the blur radius to apply the transformed outline. +bool GetSpotShadowTransform(const SkPoint3& lightPos, SkScalar lightRadius, + const SkMatrix& ctm, const SkPoint3& zPlaneParams, + const SkRect& pathBounds, bool directional, + SkMatrix* shadowTransform, SkScalar* radius); + +// get bounds prior to the ctm being applied +void GetLocalBounds(const SkPath&, const SkDrawShadowRec&, const SkMatrix& ctm, SkRect* bounds); + +} // namespace SkDrawShadowMetrics + +#endif diff --git a/gfx/skia/skia/src/core/SkDraw_atlas.cpp b/gfx/skia/skia/src/core/SkDraw_atlas.cpp new file mode 100644 index 0000000000..54bf06734c --- /dev/null +++ b/gfx/skia/skia/src/core/SkDraw_atlas.cpp @@ -0,0 +1,237 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBlender.h" +#include "include/core/SkColor.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkShader.h" +#include "include/core/SkSurfaceProps.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkCoreBlitters.h" +#include "src/core/SkDraw.h" +#include "src/core/SkEffectPriv.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkRasterPipelineOpContexts.h" +#include "src/core/SkRasterPipelineOpList.h" +#include "src/core/SkScan.h" +#include "src/core/SkSurfacePriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkVMBlitter.h" +#include "src/shaders/SkShaderBase.h" +#include "src/shaders/SkTransformShader.h" + +#include +#include +#include + +class SkBlitter; +class SkColorInfo; +class SkColorSpace; +enum class SkBlendMode; + + +static void fill_rect(const SkMatrix& ctm, const SkRasterClip& rc, + const SkRect& r, SkBlitter* blitter, SkPath* scratchPath) { + if (ctm.rectStaysRect()) { + SkRect dr; + ctm.mapRect(&dr, r); + SkScan::FillRect(dr, rc, blitter); + } else { + SkPoint pts[4]; + r.toQuad(pts); + ctm.mapPoints(pts, pts, 4); + + scratchPath->rewind(); + scratchPath->addPoly(pts, 4, true); + SkScan::FillPath(*scratchPath, rc, blitter); + } +} + +static void load_color(SkRasterPipeline_UniformColorCtx* ctx, const float rgba[]) { + // only need one of these. can I query the pipeline to know if its lowp or highp? + ctx->rgba[0] = SkScalarRoundToInt(rgba[0]*255); ctx->r = rgba[0]; + ctx->rgba[1] = SkScalarRoundToInt(rgba[1]*255); ctx->g = rgba[1]; + ctx->rgba[2] = SkScalarRoundToInt(rgba[2]*255); ctx->b = rgba[2]; + ctx->rgba[3] = SkScalarRoundToInt(rgba[3]*255); ctx->a = rgba[3]; +} + +extern bool gUseSkVMBlitter; + +class UpdatableColorShader : public SkShaderBase { +public: + explicit UpdatableColorShader(SkColorSpace* cs) + : fSteps{sk_srgb_singleton(), kUnpremul_SkAlphaType, cs, kUnpremul_SkAlphaType} {} + skvm::Color program(skvm::Builder* builder, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override { + skvm::Uniform color = uniforms->pushPtr(fValues); + skvm::F32 r = builder->arrayF(color, 0); + skvm::F32 g = builder->arrayF(color, 1); + skvm::F32 b = builder->arrayF(color, 2); + skvm::F32 a = builder->arrayF(color, 3); + + return {r, g, b, a}; + } + + void updateColor(SkColor c) const { + SkColor4f c4 = SkColor4f::FromColor(c); + fSteps.apply(c4.vec()); + auto cp4 = c4.premul(); + fValues[0] = cp4.fR; + fValues[1] = cp4.fG; + fValues[2] = cp4.fB; + fValues[3] = cp4.fA; + } + +private: + // For serialization. This will never be called. + Factory getFactory() const override { return nullptr; } + const char* getTypeName() const override { return nullptr; } + + SkColorSpaceXformSteps fSteps; + mutable float fValues[4]; +}; + +void SkDraw::drawAtlas(const SkRSXform xform[], + const SkRect textures[], + const SkColor colors[], + int count, + sk_sp blender, + const SkPaint& paint) { + sk_sp atlasShader = paint.refShader(); + if (!atlasShader) { + return; + } + + SkSTArenaAlloc<256> alloc; + + SkPaint p(paint); + p.setAntiAlias(false); // we never respect this for drawAtlas(or drawVertices) + p.setStyle(SkPaint::kFill_Style); + p.setShader(nullptr); + p.setMaskFilter(nullptr); + + const SkMatrix& ctm = fMatrixProvider->localToDevice(); + // The RSXForms can't contain perspective - only the CTM cab. + const bool perspective = ctm.hasPerspective(); + + auto transformShader = alloc.make(*as_SB(atlasShader), perspective); + + auto rpblit = [&]() { + SkRasterPipeline pipeline(&alloc); + SkSurfaceProps props = SkSurfacePropsCopyOrDefault(fProps); + SkStageRec rec = { + &pipeline, &alloc, fDst.colorType(), fDst.colorSpace(), p.getColor4f(), props}; + // We pass an identity matrix here rather than the CTM. The CTM gets folded into the + // per-triangle matrix. + if (!as_SB(transformShader)->appendRootStages(rec, SkMatrix::I())) { + return false; + } + + SkRasterPipeline_UniformColorCtx* uniformCtx = nullptr; + SkColorSpaceXformSteps steps( + sk_srgb_singleton(), kUnpremul_SkAlphaType, rec.fDstCS, kUnpremul_SkAlphaType); + + if (colors) { + // we will late-bind the values in ctx, once for each color in the loop + uniformCtx = alloc.make(); + rec.fPipeline->append(SkRasterPipelineOp::uniform_color_dst, uniformCtx); + if (std::optional bm = as_BB(blender)->asBlendMode(); bm.has_value()) { + SkBlendMode_AppendStages(*bm, rec.fPipeline); + } else { + return false; + } + } + + bool isOpaque = !colors && transformShader->isOpaque(); + if (p.getAlphaf() != 1) { + rec.fPipeline->append(SkRasterPipelineOp::scale_1_float, + alloc.make(p.getAlphaf())); + isOpaque = false; + } + + auto blitter = SkCreateRasterPipelineBlitter( + fDst, p, pipeline, isOpaque, &alloc, fRC->clipShader()); + if (!blitter) { + return false; + } + SkPath scratchPath; + + for (int i = 0; i < count; ++i) { + if (colors) { + SkColor4f c4 = SkColor4f::FromColor(colors[i]); + steps.apply(c4.vec()); + load_color(uniformCtx, c4.premul().vec()); + } + + SkMatrix mx; + mx.setRSXform(xform[i]); + mx.preTranslate(-textures[i].fLeft, -textures[i].fTop); + mx.postConcat(ctm); + if (transformShader->update(mx)) { + fill_rect(mx, *fRC, textures[i], blitter, &scratchPath); + } + } + return true; + }; + + if (gUseSkVMBlitter || !rpblit()) { + UpdatableColorShader* colorShader = nullptr; + sk_sp shader; + if (colors) { + colorShader = alloc.make(fDst.colorSpace()); + shader = SkShaders::Blend(std::move(blender), + sk_ref_sp(colorShader), + sk_ref_sp(transformShader)); + } else { + shader = sk_ref_sp(transformShader); + } + p.setShader(std::move(shader)); + // We use identity here and fold the CTM into the update matrix. + if (auto blitter = SkVMBlitter::Make(fDst, + p, + SkMatrix::I(), + &alloc, + fRC->clipShader())) { + SkPath scratchPath; + for (int i = 0; i < count; ++i) { + if (colorShader) { + colorShader->updateColor(colors[i]); + } + + SkMatrix mx; + mx.setRSXform(xform[i]); + mx.preTranslate(-textures[i].fLeft, -textures[i].fTop); + mx.postConcat(ctm); + if (transformShader->update(mx)) { + fill_rect(mx, *fRC, textures[i], blitter, &scratchPath); + } + } + } + } +} diff --git a/gfx/skia/skia/src/core/SkDraw_text.cpp b/gfx/skia/skia/src/core/SkDraw_text.cpp new file mode 100644 index 0000000000..0263eed15e --- /dev/null +++ b/gfx/skia/skia/src/core/SkDraw_text.cpp @@ -0,0 +1,143 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRegion.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkZip.h" +#include "src/core/SkAAClip.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkDraw.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkGlyphRunPainter.h" +#include "src/core/SkMask.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkSurfacePriv.h" + +#include +#include + +class SkCanvas; +class SkPaint; +namespace sktext { class GlyphRunList; } + +// disable warning : local variable used without having been initialized +#if defined _WIN32 +#pragma warning ( push ) +#pragma warning ( disable : 4701 ) +#endif + +//////////////////////////////////////////////////////////////////////////////////////////////////// + +static bool check_glyph_position(SkPoint position) { + // Prevent glyphs from being drawn outside of or straddling the edge of device space. + // Comparisons written a little weirdly so that NaN coordinates are treated safely. + auto gt = [](float a, int b) { return !(a <= (float)b); }; + auto lt = [](float a, int b) { return !(a >= (float)b); }; + return !(gt(position.fX, INT_MAX - (INT16_MAX + SkTo(UINT16_MAX))) || + lt(position.fX, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/)) || + gt(position.fY, INT_MAX - (INT16_MAX + SkTo(UINT16_MAX))) || + lt(position.fY, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/))); +} + +void SkDraw::paintMasks(SkZip accepted, const SkPaint& paint) const { + // The size used for a typical blitter. + SkSTArenaAlloc<3308> alloc; + SkBlitter* blitter = SkBlitter::Choose(fDst, + fMatrixProvider->localToDevice(), + paint, + &alloc, + false, + fRC->clipShader(), + SkSurfacePropsCopyOrDefault(fProps)); + + SkAAClipBlitterWrapper wrapper{*fRC, blitter}; + blitter = wrapper.getBlitter(); + + bool useRegion = fRC->isBW() && !fRC->isRect(); + + if (useRegion) { + for (auto [glyph, pos] : accepted) { + if (check_glyph_position(pos)) { + SkMask mask = glyph->mask(pos); + + SkRegion::Cliperator clipper(fRC->bwRgn(), mask.fBounds); + + if (!clipper.done()) { + if (SkMask::kARGB32_Format == mask.fFormat) { + SkBitmap bm; + bm.installPixels(SkImageInfo::MakeN32Premul(mask.fBounds.size()), + mask.fImage, + mask.fRowBytes); + this->drawSprite(bm, mask.fBounds.x(), mask.fBounds.y(), paint); + } else { + const SkIRect& cr = clipper.rect(); + do { + blitter->blitMask(mask, cr); + clipper.next(); + } while (!clipper.done()); + } + } + } + } + } else { + SkIRect clipBounds = fRC->isBW() ? fRC->bwRgn().getBounds() + : fRC->aaRgn().getBounds(); + for (auto [glyph, pos] : accepted) { + if (check_glyph_position(pos)) { + SkMask mask = glyph->mask(pos); + SkIRect storage; + const SkIRect* bounds = &mask.fBounds; + + // this extra test is worth it, assuming that most of the time it succeeds + // since we can avoid writing to storage + if (!clipBounds.containsNoEmptyCheck(mask.fBounds)) { + if (!storage.intersect(mask.fBounds, clipBounds)) { + continue; + } + bounds = &storage; + } + + if (SkMask::kARGB32_Format == mask.fFormat) { + SkBitmap bm; + bm.installPixels(SkImageInfo::MakeN32Premul(mask.fBounds.size()), + mask.fImage, + mask.fRowBytes); + this->drawSprite(bm, mask.fBounds.x(), mask.fBounds.y(), paint); + } else { + blitter->blitMask(mask, *bounds); + } + } + } + } +} + +void SkDraw::drawGlyphRunList(SkCanvas* canvas, + SkGlyphRunListPainterCPU* glyphPainter, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& paint) const { + + SkDEBUGCODE(this->validate();) + + if (fRC->isEmpty()) { + return; + } + + glyphPainter->drawForBitmapDevice(canvas, this, glyphRunList, paint, + fMatrixProvider->localToDevice()); +} + +#if defined _WIN32 +#pragma warning ( pop ) +#endif + diff --git a/gfx/skia/skia/src/core/SkDraw_vertices.cpp b/gfx/skia/skia/src/core/SkDraw_vertices.cpp new file mode 100644 index 0000000000..78c48d1135 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDraw_vertices.cpp @@ -0,0 +1,551 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkBlender.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkShader.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTypes.h" +#include "include/core/SkVertices.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkTLazy.h" +#include "src/base/SkVx.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkConvertPixels.h" +#include "src/core/SkCoreBlitters.h" +#include "src/core/SkDraw.h" +#include "src/core/SkEffectPriv.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkRasterPipelineOpList.h" +#include "src/core/SkScan.h" +#include "src/core/SkSurfacePriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkVMBlitter.h" +#include "src/core/SkVertState.h" +#include "src/core/SkVerticesPriv.h" +#include "src/shaders/SkShaderBase.h" +#include "src/shaders/SkTransformShader.h" + +#include +#include +#include +#include + +class SkBlitter; + +struct Matrix43 { + float fMat[12]; // column major + + skvx::float4 map(float x, float y) const { + return skvx::float4::Load(&fMat[0]) * x + + skvx::float4::Load(&fMat[4]) * y + + skvx::float4::Load(&fMat[8]); + } + + // Pass a by value, so we don't have to worry about aliasing with this + void setConcat(const Matrix43 a, const SkMatrix& b) { + SkASSERT(!b.hasPerspective()); + + fMat[ 0] = a.dot(0, b.getScaleX(), b.getSkewY()); + fMat[ 1] = a.dot(1, b.getScaleX(), b.getSkewY()); + fMat[ 2] = a.dot(2, b.getScaleX(), b.getSkewY()); + fMat[ 3] = a.dot(3, b.getScaleX(), b.getSkewY()); + + fMat[ 4] = a.dot(0, b.getSkewX(), b.getScaleY()); + fMat[ 5] = a.dot(1, b.getSkewX(), b.getScaleY()); + fMat[ 6] = a.dot(2, b.getSkewX(), b.getScaleY()); + fMat[ 7] = a.dot(3, b.getSkewX(), b.getScaleY()); + + fMat[ 8] = a.dot(0, b.getTranslateX(), b.getTranslateY()) + a.fMat[ 8]; + fMat[ 9] = a.dot(1, b.getTranslateX(), b.getTranslateY()) + a.fMat[ 9]; + fMat[10] = a.dot(2, b.getTranslateX(), b.getTranslateY()) + a.fMat[10]; + fMat[11] = a.dot(3, b.getTranslateX(), b.getTranslateY()) + a.fMat[11]; + } + +private: + float dot(int index, float x, float y) const { + return fMat[index + 0] * x + fMat[index + 4] * y; + } +}; + +static bool SK_WARN_UNUSED_RESULT +texture_to_matrix(const VertState& state, const SkPoint verts[], const SkPoint texs[], + SkMatrix* matrix) { + SkPoint src[3], dst[3]; + + src[0] = texs[state.f0]; + src[1] = texs[state.f1]; + src[2] = texs[state.f2]; + dst[0] = verts[state.f0]; + dst[1] = verts[state.f1]; + dst[2] = verts[state.f2]; + return matrix->setPolyToPoly(src, dst, 3); +} + +class SkTriColorShader : public SkShaderBase { +public: + SkTriColorShader(bool isOpaque, bool usePersp) : fIsOpaque(isOpaque), fUsePersp(usePersp) {} + + // This gets called for each triangle, without re-calling appendStages. + bool update(const SkMatrix& ctmInv, const SkPoint pts[], const SkPMColor4f colors[], + int index0, int index1, int index2); + +protected: + bool appendStages(const SkStageRec& rec, const MatrixRec&) const override { + rec.fPipeline->append(SkRasterPipelineOp::seed_shader); + if (fUsePersp) { + rec.fPipeline->append(SkRasterPipelineOp::matrix_perspective, &fM33); + } + rec.fPipeline->append(SkRasterPipelineOp::matrix_4x3, &fM43); + return true; + } + + skvm::Color program(skvm::Builder*, + skvm::Coord, + skvm::Coord, + skvm::Color, + const MatrixRec&, + const SkColorInfo&, + skvm::Uniforms*, + SkArenaAlloc*) const override; + +private: + bool isOpaque() const override { return fIsOpaque; } + // For serialization. This will never be called. + Factory getFactory() const override { return nullptr; } + const char* getTypeName() const override { return nullptr; } + + // If fUsePersp, we need both of these matrices, + // otherwise we can combine them, and only use fM43 + + Matrix43 fM43; + SkMatrix fM33; + const bool fIsOpaque; + const bool fUsePersp; // controls our stages, and what we do in update() + mutable skvm::Uniform fColorMatrix; + mutable skvm::Uniform fCoordMatrix; + + using INHERITED = SkShaderBase; +}; + +skvm::Color SkTriColorShader::program(skvm::Builder* b, + skvm::Coord device, + skvm::Coord local, + skvm::Color, + const MatrixRec&, + const SkColorInfo&, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + fColorMatrix = uniforms->pushPtr(&fM43); + + skvm::F32 x = local.x, + y = local.y; + + if (fUsePersp) { + fCoordMatrix = uniforms->pushPtr(&fM33); + auto dot = [&, x, y](int row) { + return b->mad(x, b->arrayF(fCoordMatrix, row), + b->mad(y, b->arrayF(fCoordMatrix, row + 3), + b->arrayF(fCoordMatrix, row + 6))); + }; + + x = dot(0); + y = dot(1); + x = x * (1.0f / dot(2)); + y = y * (1.0f / dot(2)); + } + + auto colorDot = [&, x, y](int row) { + return b->mad(x, b->arrayF(fColorMatrix, row), + b->mad(y, b->arrayF(fColorMatrix, row + 4), + b->arrayF(fColorMatrix, row + 8))); + }; + + skvm::Color color; + color.r = colorDot(0); + color.g = colorDot(1); + color.b = colorDot(2); + color.a = colorDot(3); + return color; +} + +bool SkTriColorShader::update(const SkMatrix& ctmInv, const SkPoint pts[], + const SkPMColor4f colors[], int index0, int index1, int index2) { + SkMatrix m, im; + m.reset(); + m.set(0, pts[index1].fX - pts[index0].fX); + m.set(1, pts[index2].fX - pts[index0].fX); + m.set(2, pts[index0].fX); + m.set(3, pts[index1].fY - pts[index0].fY); + m.set(4, pts[index2].fY - pts[index0].fY); + m.set(5, pts[index0].fY); + if (!m.invert(&im)) { + return false; + } + + fM33.setConcat(im, ctmInv); + + auto c0 = skvx::float4::Load(colors[index0].vec()), + c1 = skvx::float4::Load(colors[index1].vec()), + c2 = skvx::float4::Load(colors[index2].vec()); + + (c1 - c0).store(&fM43.fMat[0]); + (c2 - c0).store(&fM43.fMat[4]); + c0.store(&fM43.fMat[8]); + + if (!fUsePersp) { + fM43.setConcat(fM43, fM33); + } + return true; +} + +// Convert the SkColors into float colors. The conversion depends on some conditions: +// - If the pixmap has a dst colorspace, we have to be "color-correct". +// Do we map into dst-colorspace before or after we interpolate? +// - We have to decide when to apply per-color alpha (before or after we interpolate) +// +// For now, we will take a simple approach, but recognize this is just a start: +// - convert colors into dst colorspace before interpolation (matches gradients) +// - apply per-color alpha before interpolation (matches old version of vertices) +// +static SkPMColor4f* convert_colors(const SkColor src[], + int count, + SkColorSpace* deviceCS, + SkArenaAlloc* alloc, + bool skipColorXform) { + SkPMColor4f* dst = alloc->makeArray(count); + + // Passing `nullptr` for the destination CS effectively disables color conversion. + auto dstCS = skipColorXform ? nullptr : sk_ref_sp(deviceCS); + SkImageInfo srcInfo = SkImageInfo::Make( + count, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType, SkColorSpace::MakeSRGB()); + SkImageInfo dstInfo = + SkImageInfo::Make(count, 1, kRGBA_F32_SkColorType, kPremul_SkAlphaType, dstCS); + SkAssertResult(SkConvertPixels(dstInfo, dst, 0, srcInfo, src, 0)); + return dst; +} + +static bool compute_is_opaque(const SkColor colors[], int count) { + uint32_t c = ~0; + for (int i = 0; i < count; ++i) { + c &= colors[i]; + } + return SkColorGetA(c) == 0xFF; +} + +static void fill_triangle_2(const VertState& state, SkBlitter* blitter, const SkRasterClip& rc, + const SkPoint dev2[]) { + SkPoint tmp[] = { + dev2[state.f0], dev2[state.f1], dev2[state.f2] + }; + SkScan::FillTriangle(tmp, rc, blitter); +} + +static constexpr int kMaxClippedTrianglePointCount = 4; +static void fill_triangle_3(const VertState& state, SkBlitter* blitter, const SkRasterClip& rc, + const SkPoint3 dev3[]) { + // Compute the crossing point (across zero) for the two values, expressed as a + // normalized 0...1 value. If curr is 0, returns 0. If next is 0, returns 1. + auto computeT = [](float curr, float next) { + // Check that 0 is between next and curr. + SkASSERT((next <= 0 && 0 < curr) || (curr <= 0 && 0 < next)); + float t = curr / (curr - next); + SkASSERT(0 <= t && t <= 1); + return t; + }; + + auto lerp = [](SkPoint3 curr, SkPoint3 next, float t) { + return curr + t * (next - curr); + }; + + constexpr float tol = 0.05f; + // tol is the nudge away from zero, to keep the numerics nice. + // Think of it as our near-clipping-plane (or w-plane). + auto clip = [&](SkPoint3 curr, SkPoint3 next) { + // Return the point between curr and next where the fZ value crosses tol. + // To be (really) perspective correct, we should be computing based on 1/Z, not Z. + // For now, this is close enough (and faster). + return lerp(curr, next, computeT(curr.fZ - tol, next.fZ - tol)); + }; + + // Clip a triangle (based on its homogeneous W values), and return the projected polygon. + // Since we only clip against one "edge"/plane, the max number of points in the clipped + // polygon is 4. + auto clipTriangle = [&](SkPoint dst[], const int idx[3], const SkPoint3 pts[]) -> int { + SkPoint3 outPoints[kMaxClippedTrianglePointCount]; + SkPoint3* outP = outPoints; + + for (int i = 0; i < 3; ++i) { + int curr = idx[i]; + int next = idx[(i + 1) % 3]; + if (pts[curr].fZ > tol) { + *outP++ = pts[curr]; + if (pts[next].fZ <= tol) { // curr is IN, next is OUT + *outP++ = clip(pts[curr], pts[next]); + } + } else { + if (pts[next].fZ > tol) { // curr is OUT, next is IN + *outP++ = clip(pts[curr], pts[next]); + } + } + } + + const int count = SkTo(outP - outPoints); + SkASSERT(count == 0 || count == 3 || count == 4); + for (int i = 0; i < count; ++i) { + float scale = sk_ieee_float_divide(1.0f, outPoints[i].fZ); + dst[i].set(outPoints[i].fX * scale, outPoints[i].fY * scale); + } + return count; + }; + + SkPoint tmp[kMaxClippedTrianglePointCount]; + int idx[] = { state.f0, state.f1, state.f2 }; + if (int n = clipTriangle(tmp, idx, dev3)) { + // TODO: SkScan::FillConvexPoly(tmp, n, ...); + SkASSERT(n == 3 || n == 4); + SkScan::FillTriangle(tmp, rc, blitter); + if (n == 4) { + tmp[1] = tmp[2]; + tmp[2] = tmp[3]; + SkScan::FillTriangle(tmp, rc, blitter); + } + } +} + +static void fill_triangle(const VertState& state, SkBlitter* blitter, const SkRasterClip& rc, + const SkPoint dev2[], const SkPoint3 dev3[]) { + if (dev3) { + fill_triangle_3(state, blitter, rc, dev3); + } else { + fill_triangle_2(state, blitter, rc, dev2); + } +} + +extern bool gUseSkVMBlitter; + +void SkDraw::drawFixedVertices(const SkVertices* vertices, + sk_sp blender, + const SkPaint& paint, + const SkMatrix& ctmInverse, + const SkPoint* dev2, + const SkPoint3* dev3, + SkArenaAlloc* outerAlloc, + bool skipColorXform) const { + SkVerticesPriv info(vertices->priv()); + + const int vertexCount = info.vertexCount(); + const int indexCount = info.indexCount(); + const SkPoint* positions = info.positions(); + const SkPoint* texCoords = info.texCoords(); + const uint16_t* indices = info.indices(); + const SkColor* colors = info.colors(); + + SkShader* paintShader = paint.getShader(); + + if (paintShader) { + if (!texCoords) { + texCoords = positions; + } + } else { + texCoords = nullptr; + } + + bool blenderIsDst = false; + // We can simplify things for certain blend modes. This is for speed, and SkShader_Blend + // itself insists we don't pass kSrc or kDst to it. + if (std::optional bm = as_BB(blender)->asBlendMode(); bm.has_value() && colors) { + switch (*bm) { + case SkBlendMode::kSrc: + colors = nullptr; + break; + case SkBlendMode::kDst: + blenderIsDst = true; + texCoords = nullptr; + paintShader = nullptr; + break; + default: break; + } + } + + // There is a paintShader iff there is texCoords. + SkASSERT((texCoords != nullptr) == (paintShader != nullptr)); + + SkMatrix ctm = fMatrixProvider->localToDevice(); + // Explicit texture coords can't contain perspective - only the CTM can. + const bool usePerspective = ctm.hasPerspective(); + + SkTriColorShader* triColorShader = nullptr; + SkPMColor4f* dstColors = nullptr; + if (colors) { + dstColors = + convert_colors(colors, vertexCount, fDst.colorSpace(), outerAlloc, skipColorXform); + triColorShader = outerAlloc->make(compute_is_opaque(colors, vertexCount), + usePerspective); + } + + // Combines per-vertex colors with 'shader' using 'blender'. + auto applyShaderColorBlend = [&](SkShader* shader) -> sk_sp { + if (!colors) { + return sk_ref_sp(shader); + } + if (blenderIsDst) { + return sk_ref_sp(triColorShader); + } + sk_sp shaderWithWhichToBlend; + if (!shader) { + // When there is no shader then the blender applies to the vertex colors and opaque + // paint color. + shaderWithWhichToBlend = SkShaders::Color(paint.getColor4f().makeOpaque(), nullptr); + } else { + shaderWithWhichToBlend = sk_ref_sp(shader); + } + return SkShaders::Blend(blender, + sk_ref_sp(triColorShader), + std::move(shaderWithWhichToBlend)); + }; + + // If there are separate texture coords then we need to insert a transform shader to update + // a matrix derived from each triangle's coords. In that case we will fold the CTM into + // each update and use an identity matrix provider. + SkTransformShader* transformShader = nullptr; + const SkMatrixProvider* matrixProvider = fMatrixProvider; + SkTLazy identityProvider; + if (texCoords && texCoords != positions) { + paintShader = transformShader = outerAlloc->make(*as_SB(paintShader), + usePerspective); + matrixProvider = identityProvider.init(SkMatrix::I()); + } + sk_sp blenderShader = applyShaderColorBlend(paintShader); + + SkPaint finalPaint{paint}; + finalPaint.setShader(std::move(blenderShader)); + + auto rpblit = [&]() { + VertState state(vertexCount, indices, indexCount); + VertState::Proc vertProc = state.chooseProc(info.mode()); + SkSurfaceProps props = SkSurfacePropsCopyOrDefault(fProps); + + auto blitter = SkCreateRasterPipelineBlitter(fDst, + finalPaint, + matrixProvider->localToDevice(), + outerAlloc, + fRC->clipShader(), + props); + if (!blitter) { + return false; + } + while (vertProc(&state)) { + if (triColorShader && !triColorShader->update(ctmInverse, positions, dstColors, + state.f0, state.f1, state.f2)) { + continue; + } + + SkMatrix localM; + if (!transformShader || (texture_to_matrix(state, positions, texCoords, &localM) && + transformShader->update(SkMatrix::Concat(ctm, localM)))) { + fill_triangle(state, blitter, *fRC, dev2, dev3); + } + } + return true; + }; + + if (gUseSkVMBlitter || !rpblit()) { + VertState state(vertexCount, indices, indexCount); + VertState::Proc vertProc = state.chooseProc(info.mode()); + + auto blitter = SkVMBlitter::Make(fDst, + finalPaint, + matrixProvider->localToDevice(), + outerAlloc, + this->fRC->clipShader()); + if (!blitter) { + return; + } + while (vertProc(&state)) { + SkMatrix localM; + if (transformShader && !(texture_to_matrix(state, positions, texCoords, &localM) && + transformShader->update(SkMatrix::Concat(ctm, localM)))) { + continue; + } + + if (triColorShader && !triColorShader->update(ctmInverse, positions, dstColors,state.f0, + state.f1, state.f2)) { + continue; + } + + fill_triangle(state, blitter, *fRC, dev2, dev3); + } + } +} + +void SkDraw::drawVertices(const SkVertices* vertices, + sk_sp blender, + const SkPaint& paint, + bool skipColorXform) const { + SkVerticesPriv info(vertices->priv()); + const int vertexCount = info.vertexCount(); + const int indexCount = info.indexCount(); + + // abort early if there is nothing to draw + if (vertexCount < 3 || (indexCount > 0 && indexCount < 3) || fRC->isEmpty()) { + return; + } + SkMatrix ctm = fMatrixProvider->localToDevice(); + SkMatrix ctmInv; + if (!ctm.invert(&ctmInv)) { + return; + } + + constexpr size_t kDefVertexCount = 16; + constexpr size_t kOuterSize = sizeof(SkTriColorShader) + + (2 * sizeof(SkPoint) + sizeof(SkColor4f)) * kDefVertexCount; + SkSTArenaAlloc outerAlloc; + + SkPoint* dev2 = nullptr; + SkPoint3* dev3 = nullptr; + + if (ctm.hasPerspective()) { + dev3 = outerAlloc.makeArray(vertexCount); + ctm.mapHomogeneousPoints(dev3, info.positions(), vertexCount); + // similar to the bounds check for 2d points (below) + if (!SkScalarsAreFinite((const SkScalar*)dev3, vertexCount * 3)) { + return; + } + } else { + dev2 = outerAlloc.makeArray(vertexCount); + ctm.mapPoints(dev2, info.positions(), vertexCount); + + SkRect bounds; + // this also sets bounds to empty if we see a non-finite value + bounds.setBounds(dev2, vertexCount); + if (bounds.isEmpty()) { + return; + } + } + + this->drawFixedVertices( + vertices, std::move(blender), paint, ctmInv, dev2, dev3, &outerAlloc, skipColorXform); +} diff --git a/gfx/skia/skia/src/core/SkDrawable.cpp b/gfx/skia/skia/src/core/SkDrawable.cpp new file mode 100644 index 0000000000..15f6222613 --- /dev/null +++ b/gfx/skia/skia/src/core/SkDrawable.cpp @@ -0,0 +1,99 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkDrawable.h" + +#include "include/core/SkCanvas.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPictureRecorder.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" + +#include +#include +#include + +class SkPicture; + +static int32_t next_generation_id() { + static std::atomic nextID{1}; + + int32_t id; + do { + id = nextID.fetch_add(1, std::memory_order_relaxed); + } while (id == 0); + return id; +} + +SkDrawable::SkDrawable() : fGenerationID(0) {} + +static void draw_bbox(SkCanvas* canvas, const SkRect& r) { + SkPaint paint; + paint.setStyle(SkPaint::kStroke_Style); + paint.setColor(0xFFFF7088); + canvas->drawRect(r, paint); + canvas->drawLine(r.left(), r.top(), r.right(), r.bottom(), paint); + canvas->drawLine(r.left(), r.bottom(), r.right(), r.top(), paint); +} + +void SkDrawable::draw(SkCanvas* canvas, const SkMatrix* matrix) { + SkAutoCanvasRestore acr(canvas, true); + if (matrix) { + canvas->concat(*matrix); + } + this->onDraw(canvas); + + if ((false)) { + draw_bbox(canvas, this->getBounds()); + } +} + +void SkDrawable::draw(SkCanvas* canvas, SkScalar x, SkScalar y) { + SkMatrix matrix = SkMatrix::Translate(x, y); + this->draw(canvas, &matrix); +} + +SkPicture* SkDrawable::newPictureSnapshot() { + return this->onNewPictureSnapshot(); +} + +uint32_t SkDrawable::getGenerationID() { + if (0 == fGenerationID) { + fGenerationID = next_generation_id(); + } + return fGenerationID; +} + +SkRect SkDrawable::getBounds() { + return this->onGetBounds(); +} + +size_t SkDrawable::approximateBytesUsed() { + return this->onApproximateBytesUsed(); +} +size_t SkDrawable::onApproximateBytesUsed() { + return 0; +} + +void SkDrawable::notifyDrawingChanged() { + fGenerationID = 0; +} + +///////////////////////////////////////////////////////////////////////////////////////// + +SkPicture* SkDrawable::onNewPictureSnapshot() { + SkPictureRecorder recorder; + + const SkRect bounds = this->getBounds(); + SkCanvas* canvas = recorder.beginRecording(bounds); + this->draw(canvas); + if ((false)) { + draw_bbox(canvas, bounds); + } + return recorder.finishRecordingAsPicture().release(); +} diff --git a/gfx/skia/skia/src/core/SkEdge.cpp b/gfx/skia/skia/src/core/SkEdge.cpp new file mode 100644 index 0000000000..39ff122005 --- /dev/null +++ b/gfx/skia/skia/src/core/SkEdge.cpp @@ -0,0 +1,524 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkEdge.h" + +#include "include/private/base/SkTo.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkFDot6.h" + +#include + +/* + In setLine, setQuadratic, setCubic, the first thing we do is to convert + the points into FDot6. This is modulated by the shift parameter, which + will either be 0, or something like 2 for antialiasing. + + In the float case, we want to turn the float into .6 by saying pt * 64, + or pt * 256 for antialiasing. This is implemented as 1 << (shift + 6). + + In the fixed case, we want to turn the fixed into .6 by saying pt >> 10, + or pt >> 8 for antialiasing. This is implemented as pt >> (10 - shift). +*/ + +static inline SkFixed SkFDot6ToFixedDiv2(SkFDot6 value) { + // we want to return SkFDot6ToFixed(value >> 1), but we don't want to throw + // away data in value, so just perform a modify up-shift + return SkLeftShift(value, 16 - 6 - 1); +} + +///////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG +void SkEdge::dump() const { + int realLastY = SkScalarToFixed(fLastY); + if (fCurveCount > 0) { + realLastY = static_cast(this)->fQLastY; + } else if (fCurveCount < 0) { + realLastY = static_cast(this)->fCLastY; + } + SkDebugf("edge (%c): firstY:%d lastY:%d (%g) x:%g dx:%g w:%d\n", + fCurveCount > 0 ? 'Q' : (fCurveCount < 0 ? 'C' : 'L'), + fFirstY, + fLastY, + SkFixedToFloat(realLastY), + SkFixedToFloat(fX), + SkFixedToFloat(fDX), + fWinding); +} +#endif + +int SkEdge::setLine(const SkPoint& p0, const SkPoint& p1, const SkIRect* clip, int shift) { + SkFDot6 x0, y0, x1, y1; + + { +#ifdef SK_RASTERIZE_EVEN_ROUNDING + x0 = SkScalarRoundToFDot6(p0.fX, shift); + y0 = SkScalarRoundToFDot6(p0.fY, shift); + x1 = SkScalarRoundToFDot6(p1.fX, shift); + y1 = SkScalarRoundToFDot6(p1.fY, shift); +#else + float scale = float(1 << (shift + 6)); + x0 = int(p0.fX * scale); + y0 = int(p0.fY * scale); + x1 = int(p1.fX * scale); + y1 = int(p1.fY * scale); +#endif + } + + int winding = 1; + + if (y0 > y1) { + using std::swap; + swap(x0, x1); + swap(y0, y1); + winding = -1; + } + + int top = SkFDot6Round(y0); + int bot = SkFDot6Round(y1); + + // are we a zero-height line? + if (top == bot) { + return 0; + } + // are we completely above or below the clip? + if (clip && (top >= clip->fBottom || bot <= clip->fTop)) { + return 0; + } + + SkFixed slope = SkFDot6Div(x1 - x0, y1 - y0); + const SkFDot6 dy = SkEdge_Compute_DY(top, y0); + + fX = SkFDot6ToFixed(x0 + SkFixedMul(slope, dy)); // + SK_Fixed1/2 + fDX = slope; + fFirstY = top; + fLastY = bot - 1; + fEdgeType = kLine_Type; + fCurveCount = 0; + fWinding = SkToS8(winding); + fCurveShift = 0; + + if (clip) { + this->chopLineWithClip(*clip); + } + return 1; +} + +// called from a curve subclass +int SkEdge::updateLine(SkFixed x0, SkFixed y0, SkFixed x1, SkFixed y1) +{ + SkASSERT(fWinding == 1 || fWinding == -1); + SkASSERT(fCurveCount != 0); +// SkASSERT(fCurveShift != 0); + + y0 >>= 10; + y1 >>= 10; + + SkASSERT(y0 <= y1); + + int top = SkFDot6Round(y0); + int bot = SkFDot6Round(y1); + +// SkASSERT(top >= fFirstY); + + // are we a zero-height line? + if (top == bot) + return 0; + + x0 >>= 10; + x1 >>= 10; + + SkFixed slope = SkFDot6Div(x1 - x0, y1 - y0); + const SkFDot6 dy = SkEdge_Compute_DY(top, y0); + + fX = SkFDot6ToFixed(x0 + SkFixedMul(slope, dy)); // + SK_Fixed1/2 + fDX = slope; + fFirstY = top; + fLastY = bot - 1; + + return 1; +} + +void SkEdge::chopLineWithClip(const SkIRect& clip) +{ + int top = fFirstY; + + SkASSERT(top < clip.fBottom); + + // clip the line to the top + if (top < clip.fTop) + { + SkASSERT(fLastY >= clip.fTop); + fX += fDX * (clip.fTop - top); + fFirstY = clip.fTop; + } +} + +/////////////////////////////////////////////////////////////////////////////// + +/* We store 1< dy) + dx += dy >> 1; + else + dx = dy + (dx >> 1); + return dx; +} + +static inline int diff_to_shift(SkFDot6 dx, SkFDot6 dy, int shiftAA = 2) +{ + // cheap calc of distance from center of p0-p2 to the center of the curve + SkFDot6 dist = cheap_distance(dx, dy); + + // shift down dist (it is currently in dot6) + // down by 3 should give us 1/8 pixel accuracy (assuming our dist is accurate...) + // this is chosen by heuristic: make it as big as possible (to minimize segments) + // ... but small enough so that our curves still look smooth + // When shift > 0, we're using AA and everything is scaled up so we can + // lower the accuracy. + dist = (dist + (1 << 4)) >> (3 + shiftAA); + + // each subdivision (shift value) cuts this dist (error) by 1/4 + return (32 - SkCLZ(dist)) >> 1; +} + +bool SkQuadraticEdge::setQuadraticWithoutUpdate(const SkPoint pts[3], int shift) { + SkFDot6 x0, y0, x1, y1, x2, y2; + + { +#ifdef SK_RASTERIZE_EVEN_ROUNDING + x0 = SkScalarRoundToFDot6(pts[0].fX, shift); + y0 = SkScalarRoundToFDot6(pts[0].fY, shift); + x1 = SkScalarRoundToFDot6(pts[1].fX, shift); + y1 = SkScalarRoundToFDot6(pts[1].fY, shift); + x2 = SkScalarRoundToFDot6(pts[2].fX, shift); + y2 = SkScalarRoundToFDot6(pts[2].fY, shift); +#else + float scale = float(1 << (shift + 6)); + x0 = int(pts[0].fX * scale); + y0 = int(pts[0].fY * scale); + x1 = int(pts[1].fX * scale); + y1 = int(pts[1].fY * scale); + x2 = int(pts[2].fX * scale); + y2 = int(pts[2].fY * scale); +#endif + } + + int winding = 1; + if (y0 > y2) + { + using std::swap; + swap(x0, x2); + swap(y0, y2); + winding = -1; + } + SkASSERT(y0 <= y1 && y1 <= y2); + + int top = SkFDot6Round(y0); + int bot = SkFDot6Round(y2); + + // are we a zero-height quad (line)? + if (top == bot) + return 0; + + // compute number of steps needed (1 << shift) + { + SkFDot6 dx = (SkLeftShift(x1, 1) - x0 - x2) >> 2; + SkFDot6 dy = (SkLeftShift(y1, 1) - y0 - y2) >> 2; + // This is a little confusing: + // before this line, shift is the scale up factor for AA; + // after this line, shift is the fCurveShift. + shift = diff_to_shift(dx, dy, shift); + SkASSERT(shift >= 0); + } + // need at least 1 subdivision for our bias trick + if (shift == 0) { + shift = 1; + } else if (shift > MAX_COEFF_SHIFT) { + shift = MAX_COEFF_SHIFT; + } + + fWinding = SkToS8(winding); + //fCubicDShift only set for cubics + fEdgeType = kQuad_Type; + fCurveCount = SkToS8(1 << shift); + + /* + * We want to reformulate into polynomial form, to make it clear how we + * should forward-difference. + * + * p0 (1 - t)^2 + p1 t(1 - t) + p2 t^2 ==> At^2 + Bt + C + * + * A = p0 - 2p1 + p2 + * B = 2(p1 - p0) + * C = p0 + * + * Our caller must have constrained our inputs (p0..p2) to all fit into + * 16.16. However, as seen above, we sometimes compute values that can be + * larger (e.g. B = 2*(p1 - p0)). To guard against overflow, we will store + * A and B at 1/2 of their actual value, and just apply a 2x scale during + * application in updateQuadratic(). Hence we store (shift - 1) in + * fCurveShift. + */ + + fCurveShift = SkToU8(shift - 1); + + SkFixed A = SkFDot6ToFixedDiv2(x0 - x1 - x1 + x2); // 1/2 the real value + SkFixed B = SkFDot6ToFixed(x1 - x0); // 1/2 the real value + + fQx = SkFDot6ToFixed(x0); + fQDx = B + (A >> shift); // biased by shift + fQDDx = A >> (shift - 1); // biased by shift + + A = SkFDot6ToFixedDiv2(y0 - y1 - y1 + y2); // 1/2 the real value + B = SkFDot6ToFixed(y1 - y0); // 1/2 the real value + + fQy = SkFDot6ToFixed(y0); + fQDy = B + (A >> shift); // biased by shift + fQDDy = A >> (shift - 1); // biased by shift + + fQLastX = SkFDot6ToFixed(x2); + fQLastY = SkFDot6ToFixed(y2); + + return true; +} + +int SkQuadraticEdge::setQuadratic(const SkPoint pts[3], int shift) { + if (!setQuadraticWithoutUpdate(pts, shift)) { + return 0; + } + return this->updateQuadratic(); +} + +int SkQuadraticEdge::updateQuadratic() +{ + int success; + int count = fCurveCount; + SkFixed oldx = fQx; + SkFixed oldy = fQy; + SkFixed dx = fQDx; + SkFixed dy = fQDy; + SkFixed newx, newy; + int shift = fCurveShift; + + SkASSERT(count > 0); + + do { + if (--count > 0) + { + newx = oldx + (dx >> shift); + dx += fQDDx; + newy = oldy + (dy >> shift); + dy += fQDDy; + } + else // last segment + { + newx = fQLastX; + newy = fQLastY; + } + success = this->updateLine(oldx, oldy, newx, newy); + oldx = newx; + oldy = newy; + } while (count > 0 && !success); + + fQx = newx; + fQy = newy; + fQDx = dx; + fQDy = dy; + fCurveCount = SkToS8(count); + return success; +} + +///////////////////////////////////////////////////////////////////////// + +static inline int SkFDot6UpShift(SkFDot6 x, int upShift) { + SkASSERT((SkLeftShift(x, upShift) >> upShift) == x); + return SkLeftShift(x, upShift); +} + +/* f(1/3) = (8a + 12b + 6c + d) / 27 + f(2/3) = (a + 6b + 12c + 8d) / 27 + + f(1/3)-b = (8a - 15b + 6c + d) / 27 + f(2/3)-c = (a + 6b - 15c + 8d) / 27 + + use 16/512 to approximate 1/27 +*/ +static SkFDot6 cubic_delta_from_line(SkFDot6 a, SkFDot6 b, SkFDot6 c, SkFDot6 d) +{ + // since our parameters may be negative, we don't use << to avoid ASAN warnings + SkFDot6 oneThird = (a*8 - b*15 + 6*c + d) * 19 >> 9; + SkFDot6 twoThird = (a + 6*b - c*15 + d*8) * 19 >> 9; + + return std::max(SkAbs32(oneThird), SkAbs32(twoThird)); +} + +bool SkCubicEdge::setCubicWithoutUpdate(const SkPoint pts[4], int shift, bool sortY) { + SkFDot6 x0, y0, x1, y1, x2, y2, x3, y3; + + { +#ifdef SK_RASTERIZE_EVEN_ROUNDING + x0 = SkScalarRoundToFDot6(pts[0].fX, shift); + y0 = SkScalarRoundToFDot6(pts[0].fY, shift); + x1 = SkScalarRoundToFDot6(pts[1].fX, shift); + y1 = SkScalarRoundToFDot6(pts[1].fY, shift); + x2 = SkScalarRoundToFDot6(pts[2].fX, shift); + y2 = SkScalarRoundToFDot6(pts[2].fY, shift); + x3 = SkScalarRoundToFDot6(pts[3].fX, shift); + y3 = SkScalarRoundToFDot6(pts[3].fY, shift); +#else + float scale = float(1 << (shift + 6)); + x0 = int(pts[0].fX * scale); + y0 = int(pts[0].fY * scale); + x1 = int(pts[1].fX * scale); + y1 = int(pts[1].fY * scale); + x2 = int(pts[2].fX * scale); + y2 = int(pts[2].fY * scale); + x3 = int(pts[3].fX * scale); + y3 = int(pts[3].fY * scale); +#endif + } + + int winding = 1; + if (sortY && y0 > y3) + { + using std::swap; + swap(x0, x3); + swap(x1, x2); + swap(y0, y3); + swap(y1, y2); + winding = -1; + } + + int top = SkFDot6Round(y0); + int bot = SkFDot6Round(y3); + + // are we a zero-height cubic (line)? + if (sortY && top == bot) + return 0; + + // compute number of steps needed (1 << shift) + { + // Can't use (center of curve - center of baseline), since center-of-curve + // need not be the max delta from the baseline (it could even be coincident) + // so we try just looking at the two off-curve points + SkFDot6 dx = cubic_delta_from_line(x0, x1, x2, x3); + SkFDot6 dy = cubic_delta_from_line(y0, y1, y2, y3); + // add 1 (by observation) + shift = diff_to_shift(dx, dy) + 1; + } + // need at least 1 subdivision for our bias trick + SkASSERT(shift > 0); + if (shift > MAX_COEFF_SHIFT) { + shift = MAX_COEFF_SHIFT; + } + + /* Since our in coming data is initially shifted down by 10 (or 8 in + antialias). That means the most we can shift up is 8. However, we + compute coefficients with a 3*, so the safest upshift is really 6 + */ + int upShift = 6; // largest safe value + int downShift = shift + upShift - 10; + if (downShift < 0) { + downShift = 0; + upShift = 10 - shift; + } + + fWinding = SkToS8(winding); + fEdgeType = kCubic_Type; + fCurveCount = SkToS8(SkLeftShift(-1, shift)); + fCurveShift = SkToU8(shift); + fCubicDShift = SkToU8(downShift); + + SkFixed B = SkFDot6UpShift(3 * (x1 - x0), upShift); + SkFixed C = SkFDot6UpShift(3 * (x0 - x1 - x1 + x2), upShift); + SkFixed D = SkFDot6UpShift(x3 + 3 * (x1 - x2) - x0, upShift); + + fCx = SkFDot6ToFixed(x0); + fCDx = B + (C >> shift) + (D >> 2*shift); // biased by shift + fCDDx = 2*C + (3*D >> (shift - 1)); // biased by 2*shift + fCDDDx = 3*D >> (shift - 1); // biased by 2*shift + + B = SkFDot6UpShift(3 * (y1 - y0), upShift); + C = SkFDot6UpShift(3 * (y0 - y1 - y1 + y2), upShift); + D = SkFDot6UpShift(y3 + 3 * (y1 - y2) - y0, upShift); + + fCy = SkFDot6ToFixed(y0); + fCDy = B + (C >> shift) + (D >> 2*shift); // biased by shift + fCDDy = 2*C + (3*D >> (shift - 1)); // biased by 2*shift + fCDDDy = 3*D >> (shift - 1); // biased by 2*shift + + fCLastX = SkFDot6ToFixed(x3); + fCLastY = SkFDot6ToFixed(y3); + + return true; +} + +int SkCubicEdge::setCubic(const SkPoint pts[4], int shift) { + if (!this->setCubicWithoutUpdate(pts, shift)) { + return 0; + } + return this->updateCubic(); +} + +int SkCubicEdge::updateCubic() +{ + int success; + int count = fCurveCount; + SkFixed oldx = fCx; + SkFixed oldy = fCy; + SkFixed newx, newy; + const int ddshift = fCurveShift; + const int dshift = fCubicDShift; + + SkASSERT(count < 0); + + do { + if (++count < 0) + { + newx = oldx + (fCDx >> dshift); + fCDx += fCDDx >> ddshift; + fCDDx += fCDDDx; + + newy = oldy + (fCDy >> dshift); + fCDy += fCDDy >> ddshift; + fCDDy += fCDDDy; + } + else // last segment + { + // SkDebugf("LastX err=%d, LastY err=%d\n", (oldx + (fCDx >> shift) - fLastX), (oldy + (fCDy >> shift) - fLastY)); + newx = fCLastX; + newy = fCLastY; + } + + // we want to say SkASSERT(oldy <= newy), but our finite fixedpoint + // doesn't always achieve that, so we have to explicitly pin it here. + if (newy < oldy) { + newy = oldy; + } + + success = this->updateLine(oldx, oldy, newx, newy); + oldx = newx; + oldy = newy; + } while (count < 0 && !success); + + fCx = newx; + fCy = newy; + fCurveCount = SkToS8(count); + return success; +} diff --git a/gfx/skia/skia/src/core/SkEdge.h b/gfx/skia/skia/src/core/SkEdge.h new file mode 100644 index 0000000000..99c30c530b --- /dev/null +++ b/gfx/skia/skia/src/core/SkEdge.h @@ -0,0 +1,137 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEdge_DEFINED +#define SkEdge_DEFINED + +#include "include/core/SkRect.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkFDot6.h" + +#include + +// This correctly favors the lower-pixel when y0 is on a 1/2 pixel boundary +#define SkEdge_Compute_DY(top, y0) (SkLeftShift(top, 6) + 32 - (y0)) + +struct SkEdge { + enum Type { + kLine_Type, + kQuad_Type, + kCubic_Type + }; + + SkEdge* fNext; + SkEdge* fPrev; + + SkFixed fX; + SkFixed fDX; + int32_t fFirstY; + int32_t fLastY; + Type fEdgeType; // Remembers the *initial* edge type + int8_t fCurveCount; // only used by kQuad(+) and kCubic(-) + uint8_t fCurveShift; // appled to all Dx/DDx/DDDx except for fCubicDShift exception + uint8_t fCubicDShift; // applied to fCDx and fCDy only in cubic + int8_t fWinding; // 1 or -1 + + int setLine(const SkPoint& p0, const SkPoint& p1, const SkIRect* clip, int shiftUp); + // call this version if you know you don't have a clip + inline int setLine(const SkPoint& p0, const SkPoint& p1, int shiftUp); + inline int updateLine(SkFixed ax, SkFixed ay, SkFixed bx, SkFixed by); + void chopLineWithClip(const SkIRect& clip); + + inline bool intersectsClip(const SkIRect& clip) const { + SkASSERT(fFirstY < clip.fBottom); + return fLastY >= clip.fTop; + } + +#ifdef SK_DEBUG + void dump() const; + void validate() const { + SkASSERT(fPrev && fNext); + SkASSERT(fPrev->fNext == this); + SkASSERT(fNext->fPrev == this); + + SkASSERT(fFirstY <= fLastY); + SkASSERT(SkAbs32(fWinding) == 1); + } +#endif +}; + +struct SkQuadraticEdge : public SkEdge { + SkFixed fQx, fQy; + SkFixed fQDx, fQDy; + SkFixed fQDDx, fQDDy; + SkFixed fQLastX, fQLastY; + + bool setQuadraticWithoutUpdate(const SkPoint pts[3], int shiftUp); + int setQuadratic(const SkPoint pts[3], int shiftUp); + int updateQuadratic(); +}; + +struct SkCubicEdge : public SkEdge { + SkFixed fCx, fCy; + SkFixed fCDx, fCDy; + SkFixed fCDDx, fCDDy; + SkFixed fCDDDx, fCDDDy; + SkFixed fCLastX, fCLastY; + + bool setCubicWithoutUpdate(const SkPoint pts[4], int shiftUp, bool sortY = true); + int setCubic(const SkPoint pts[4], int shiftUp); + int updateCubic(); +}; + +int SkEdge::setLine(const SkPoint& p0, const SkPoint& p1, int shift) { + SkFDot6 x0, y0, x1, y1; + + { +#ifdef SK_RASTERIZE_EVEN_ROUNDING + x0 = SkScalarRoundToFDot6(p0.fX, shift); + y0 = SkScalarRoundToFDot6(p0.fY, shift); + x1 = SkScalarRoundToFDot6(p1.fX, shift); + y1 = SkScalarRoundToFDot6(p1.fY, shift); +#else + float scale = float(1 << (shift + 6)); + x0 = int(p0.fX * scale); + y0 = int(p0.fY * scale); + x1 = int(p1.fX * scale); + y1 = int(p1.fY * scale); +#endif + } + + int winding = 1; + + if (y0 > y1) { + using std::swap; + swap(x0, x1); + swap(y0, y1); + winding = -1; + } + + int top = SkFDot6Round(y0); + int bot = SkFDot6Round(y1); + + // are we a zero-height line? + if (top == bot) { + return 0; + } + + SkFixed slope = SkFDot6Div(x1 - x0, y1 - y0); + const SkFDot6 dy = SkEdge_Compute_DY(top, y0); + + fX = SkFDot6ToFixed(x0 + SkFixedMul(slope, dy)); // + SK_Fixed1/2 + fDX = slope; + fFirstY = top; + fLastY = bot - 1; + fEdgeType = kLine_Type; + fCurveCount = 0; + fWinding = SkToS8(winding); + fCurveShift = 0; + return 1; +} + +#endif diff --git a/gfx/skia/skia/src/core/SkEdgeBuilder.cpp b/gfx/skia/skia/src/core/SkEdgeBuilder.cpp new file mode 100644 index 0000000000..4cc560a795 --- /dev/null +++ b/gfx/skia/skia/src/core/SkEdgeBuilder.cpp @@ -0,0 +1,394 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkEdgeBuilder.h" + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkSafe32.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkAnalyticEdge.h" +#include "src/core/SkEdge.h" +#include "src/core/SkEdgeClipper.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkLineClipper.h" +#include "src/core/SkPathPriv.h" + +SkEdgeBuilder::Combine SkBasicEdgeBuilder::combineVertical(const SkEdge* edge, SkEdge* last) { + // We only consider edges that were originally lines to be vertical to avoid numerical issues + // (crbug.com/1154864). + if (last->fEdgeType != SkEdge::kLine_Type || last->fDX || edge->fX != last->fX) { + return kNo_Combine; + } + if (edge->fWinding == last->fWinding) { + if (edge->fLastY + 1 == last->fFirstY) { + last->fFirstY = edge->fFirstY; + return kPartial_Combine; + } + if (edge->fFirstY == last->fLastY + 1) { + last->fLastY = edge->fLastY; + return kPartial_Combine; + } + return kNo_Combine; + } + if (edge->fFirstY == last->fFirstY) { + if (edge->fLastY == last->fLastY) { + return kTotal_Combine; + } + if (edge->fLastY < last->fLastY) { + last->fFirstY = edge->fLastY + 1; + return kPartial_Combine; + } + last->fFirstY = last->fLastY + 1; + last->fLastY = edge->fLastY; + last->fWinding = edge->fWinding; + return kPartial_Combine; + } + if (edge->fLastY == last->fLastY) { + if (edge->fFirstY > last->fFirstY) { + last->fLastY = edge->fFirstY - 1; + return kPartial_Combine; + } + last->fLastY = last->fFirstY - 1; + last->fFirstY = edge->fFirstY; + last->fWinding = edge->fWinding; + return kPartial_Combine; + } + return kNo_Combine; +} + +SkEdgeBuilder::Combine SkAnalyticEdgeBuilder::combineVertical(const SkAnalyticEdge* edge, + SkAnalyticEdge* last) { + auto approximately_equal = [](SkFixed a, SkFixed b) { + return SkAbs32(a - b) < 0x100; + }; + + // We only consider edges that were originally lines to be vertical to avoid numerical issues + // (crbug.com/1154864). + if (last->fEdgeType != SkAnalyticEdge::kLine_Type || last->fDX || edge->fX != last->fX) { + return kNo_Combine; + } + if (edge->fWinding == last->fWinding) { + if (edge->fLowerY == last->fUpperY) { + last->fUpperY = edge->fUpperY; + last->fY = last->fUpperY; + return kPartial_Combine; + } + if (approximately_equal(edge->fUpperY, last->fLowerY)) { + last->fLowerY = edge->fLowerY; + return kPartial_Combine; + } + return kNo_Combine; + } + if (approximately_equal(edge->fUpperY, last->fUpperY)) { + if (approximately_equal(edge->fLowerY, last->fLowerY)) { + return kTotal_Combine; + } + if (edge->fLowerY < last->fLowerY) { + last->fUpperY = edge->fLowerY; + last->fY = last->fUpperY; + return kPartial_Combine; + } + last->fUpperY = last->fLowerY; + last->fY = last->fUpperY; + last->fLowerY = edge->fLowerY; + last->fWinding = edge->fWinding; + return kPartial_Combine; + } + if (approximately_equal(edge->fLowerY, last->fLowerY)) { + if (edge->fUpperY > last->fUpperY) { + last->fLowerY = edge->fUpperY; + return kPartial_Combine; + } + last->fLowerY = last->fUpperY; + last->fUpperY = edge->fUpperY; + last->fY = last->fUpperY; + last->fWinding = edge->fWinding; + return kPartial_Combine; + } + return kNo_Combine; +} + +template +static bool is_vertical(const Edge* edge) { + // We only consider edges that were originally lines to be vertical to avoid numerical issues + // (crbug.com/1154864). + return edge->fDX == 0 + && edge->fEdgeType == Edge::kLine_Type; +} + +// TODO: we can deallocate the edge if edge->setFoo() fails +// or when we don't use it (kPartial_Combine or kTotal_Combine). + +void SkBasicEdgeBuilder::addLine(const SkPoint pts[]) { + SkEdge* edge = fAlloc.make(); + if (edge->setLine(pts[0], pts[1], fClipShift)) { + Combine combine = is_vertical(edge) && !fList.empty() + ? this->combineVertical(edge, (SkEdge*)fList.back()) + : kNo_Combine; + + switch (combine) { + case kTotal_Combine: fList.pop_back(); break; + case kPartial_Combine: break; + case kNo_Combine: fList.push_back(edge); break; + } + } +} +void SkAnalyticEdgeBuilder::addLine(const SkPoint pts[]) { + SkAnalyticEdge* edge = fAlloc.make(); + if (edge->setLine(pts[0], pts[1])) { + + Combine combine = is_vertical(edge) && !fList.empty() + ? this->combineVertical(edge, (SkAnalyticEdge*)fList.back()) + : kNo_Combine; + + switch (combine) { + case kTotal_Combine: fList.pop_back(); break; + case kPartial_Combine: break; + case kNo_Combine: fList.push_back(edge); break; + } + } +} +void SkBasicEdgeBuilder::addQuad(const SkPoint pts[]) { + SkQuadraticEdge* edge = fAlloc.make(); + if (edge->setQuadratic(pts, fClipShift)) { + fList.push_back(edge); + } +} +void SkAnalyticEdgeBuilder::addQuad(const SkPoint pts[]) { + SkAnalyticQuadraticEdge* edge = fAlloc.make(); + if (edge->setQuadratic(pts)) { + fList.push_back(edge); + } +} + +void SkBasicEdgeBuilder::addCubic(const SkPoint pts[]) { + SkCubicEdge* edge = fAlloc.make(); + if (edge->setCubic(pts, fClipShift)) { + fList.push_back(edge); + } +} +void SkAnalyticEdgeBuilder::addCubic(const SkPoint pts[]) { + SkAnalyticCubicEdge* edge = fAlloc.make(); + if (edge->setCubic(pts)) { + fList.push_back(edge); + } +} + +// TODO: merge addLine() and addPolyLine()? + +SkEdgeBuilder::Combine SkBasicEdgeBuilder::addPolyLine(const SkPoint pts[], + char* arg_edge, char** arg_edgePtr) { + auto edge = (SkEdge*) arg_edge; + auto edgePtr = (SkEdge**)arg_edgePtr; + + if (edge->setLine(pts[0], pts[1], fClipShift)) { + return is_vertical(edge) && edgePtr > (SkEdge**)fEdgeList + ? this->combineVertical(edge, edgePtr[-1]) + : kNo_Combine; + } + return SkEdgeBuilder::kPartial_Combine; // A convenient lie. Same do-nothing behavior. +} +SkEdgeBuilder::Combine SkAnalyticEdgeBuilder::addPolyLine(const SkPoint pts[], + char* arg_edge, char** arg_edgePtr) { + auto edge = (SkAnalyticEdge*) arg_edge; + auto edgePtr = (SkAnalyticEdge**)arg_edgePtr; + + if (edge->setLine(pts[0], pts[1])) { + return is_vertical(edge) && edgePtr > (SkAnalyticEdge**)fEdgeList + ? this->combineVertical(edge, edgePtr[-1]) + : kNo_Combine; + } + return SkEdgeBuilder::kPartial_Combine; // As above. +} + +SkRect SkBasicEdgeBuilder::recoverClip(const SkIRect& src) const { + return { SkIntToScalar(src.fLeft >> fClipShift), + SkIntToScalar(src.fTop >> fClipShift), + SkIntToScalar(src.fRight >> fClipShift), + SkIntToScalar(src.fBottom >> fClipShift), }; +} +SkRect SkAnalyticEdgeBuilder::recoverClip(const SkIRect& src) const { + return SkRect::Make(src); +} + +char* SkBasicEdgeBuilder::allocEdges(size_t n, size_t* size) { + *size = sizeof(SkEdge); + return (char*)fAlloc.makeArrayDefault(n); +} +char* SkAnalyticEdgeBuilder::allocEdges(size_t n, size_t* size) { + *size = sizeof(SkAnalyticEdge); + return (char*)fAlloc.makeArrayDefault(n); +} + +// TODO: maybe get rid of buildPoly() entirely? +int SkEdgeBuilder::buildPoly(const SkPath& path, const SkIRect* iclip, bool canCullToTheRight) { + size_t maxEdgeCount = path.countPoints(); + if (iclip) { + // clipping can turn 1 line into (up to) kMaxClippedLineSegments, since + // we turn portions that are clipped out on the left/right into vertical + // segments. + SkSafeMath safe; + maxEdgeCount = safe.mul(maxEdgeCount, SkLineClipper::kMaxClippedLineSegments); + if (!safe) { + return 0; + } + } + + size_t edgeSize; + char* edge = this->allocEdges(maxEdgeCount, &edgeSize); + + SkDEBUGCODE(char* edgeStart = edge); + char** edgePtr = fAlloc.makeArrayDefault(maxEdgeCount); + fEdgeList = (void**)edgePtr; + + SkPathEdgeIter iter(path); + if (iclip) { + SkRect clip = this->recoverClip(*iclip); + + while (auto e = iter.next()) { + switch (e.fEdge) { + case SkPathEdgeIter::Edge::kLine: { + SkPoint lines[SkLineClipper::kMaxPoints]; + int lineCount = SkLineClipper::ClipLine(e.fPts, clip, lines, canCullToTheRight); + SkASSERT(lineCount <= SkLineClipper::kMaxClippedLineSegments); + for (int i = 0; i < lineCount; i++) { + switch( this->addPolyLine(lines + i, edge, edgePtr) ) { + case kTotal_Combine: edgePtr--; break; + case kPartial_Combine: break; + case kNo_Combine: *edgePtr++ = edge; + edge += edgeSize; + } + } + break; + } + default: + SkDEBUGFAIL("unexpected verb"); + break; + } + } + } else { + while (auto e = iter.next()) { + switch (e.fEdge) { + case SkPathEdgeIter::Edge::kLine: { + switch( this->addPolyLine(e.fPts, edge, edgePtr) ) { + case kTotal_Combine: edgePtr--; break; + case kPartial_Combine: break; + case kNo_Combine: *edgePtr++ = edge; + edge += edgeSize; + } + break; + } + default: + SkDEBUGFAIL("unexpected verb"); + break; + } + } + } + SkASSERT((size_t)(edge - edgeStart) <= maxEdgeCount * edgeSize); + SkASSERT((size_t)(edgePtr - (char**)fEdgeList) <= maxEdgeCount); + return SkToInt(edgePtr - (char**)fEdgeList); +} + +int SkEdgeBuilder::build(const SkPath& path, const SkIRect* iclip, bool canCullToTheRight) { + SkAutoConicToQuads quadder; + const SkScalar conicTol = SK_Scalar1 / 4; + bool is_finite = true; + + SkPathEdgeIter iter(path); + if (iclip) { + SkRect clip = this->recoverClip(*iclip); + struct Rec { + SkEdgeBuilder* fBuilder; + bool fIsFinite; + } rec = { this, true }; + + SkEdgeClipper::ClipPath(path, clip, canCullToTheRight, + [](SkEdgeClipper* clipper, bool, void* ctx) { + Rec* rec = (Rec*)ctx; + SkPoint pts[4]; + SkPath::Verb verb; + + while ((verb = clipper->next(pts)) != SkPath::kDone_Verb) { + const int count = SkPathPriv::PtsInIter(verb); + if (!SkScalarsAreFinite(&pts[0].fX, count*2)) { + rec->fIsFinite = false; + return; + } + switch (verb) { + case SkPath::kLine_Verb: rec->fBuilder->addLine (pts); break; + case SkPath::kQuad_Verb: rec->fBuilder->addQuad (pts); break; + case SkPath::kCubic_Verb: rec->fBuilder->addCubic(pts); break; + default: break; + } + } + }, &rec); + is_finite = rec.fIsFinite; + } else { + auto handle_quad = [this](const SkPoint pts[3]) { + SkPoint monoX[5]; + int n = SkChopQuadAtYExtrema(pts, monoX); + for (int i = 0; i <= n; i++) { + this->addQuad(&monoX[i * 2]); + } + }; + while (auto e = iter.next()) { + switch (e.fEdge) { + case SkPathEdgeIter::Edge::kLine: + this->addLine(e.fPts); + break; + case SkPathEdgeIter::Edge::kQuad: { + handle_quad(e.fPts); + break; + } + case SkPathEdgeIter::Edge::kConic: { + const SkPoint* quadPts = quadder.computeQuads( + e.fPts, iter.conicWeight(), conicTol); + for (int i = 0; i < quadder.countQuads(); ++i) { + handle_quad(quadPts); + quadPts += 2; + } + } break; + case SkPathEdgeIter::Edge::kCubic: { + SkPoint monoY[10]; + int n = SkChopCubicAtYExtrema(e.fPts, monoY); + for (int i = 0; i <= n; i++) { + this->addCubic(&monoY[i * 3]); + } + break; + } + } + } + } + fEdgeList = fList.begin(); + return is_finite ? fList.size() : 0; +} + +int SkEdgeBuilder::buildEdges(const SkPath& path, + const SkIRect* shiftedClip) { + // If we're convex, then we need both edges, even if the right edge is past the clip. + const bool canCullToTheRight = !path.isConvex(); + + // We can use our buildPoly() optimization if all the segments are lines. + // (Edges are homogeneous and stored contiguously in memory, no need for indirection.) + const int count = SkPath::kLine_SegmentMask == path.getSegmentMasks() + ? this->buildPoly(path, shiftedClip, canCullToTheRight) + : this->build (path, shiftedClip, canCullToTheRight); + + SkASSERT(count >= 0); + + // If we can't cull to the right, we should have count > 1 (or 0). + if (!canCullToTheRight) { + SkASSERT(count != 1); + } + return count; +} diff --git a/gfx/skia/skia/src/core/SkEdgeBuilder.h b/gfx/skia/skia/src/core/SkEdgeBuilder.h new file mode 100644 index 0000000000..0db124c575 --- /dev/null +++ b/gfx/skia/skia/src/core/SkEdgeBuilder.h @@ -0,0 +1,92 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkEdgeBuilder_DEFINED +#define SkEdgeBuilder_DEFINED + +#include "include/core/SkRect.h" +#include "include/private/base/SkTDArray.h" +#include "src/base/SkArenaAlloc.h" + +#include + +class SkPath; +struct SkAnalyticEdge; +struct SkEdge; +struct SkPoint; + +class SkEdgeBuilder { +public: + int buildEdges(const SkPath& path, + const SkIRect* shiftedClip); + +protected: + SkEdgeBuilder() = default; + virtual ~SkEdgeBuilder() = default; + + // In general mode we allocate pointers in fList and fEdgeList points to its head. + // In polygon mode we preallocated edges contiguously in fAlloc and fEdgeList points there. + void** fEdgeList = nullptr; + SkTDArray fList; + SkSTArenaAlloc<512> fAlloc; + + enum Combine { + kNo_Combine, + kPartial_Combine, + kTotal_Combine + }; + +private: + int build (const SkPath& path, const SkIRect* clip, bool clipToTheRight); + int buildPoly(const SkPath& path, const SkIRect* clip, bool clipToTheRight); + + virtual char* allocEdges(size_t n, size_t* sizeof_edge) = 0; + virtual SkRect recoverClip(const SkIRect&) const = 0; + + virtual void addLine (const SkPoint pts[]) = 0; + virtual void addQuad (const SkPoint pts[]) = 0; + virtual void addCubic(const SkPoint pts[]) = 0; + virtual Combine addPolyLine(const SkPoint pts[], char* edge, char** edgePtr) = 0; +}; + +class SkBasicEdgeBuilder final : public SkEdgeBuilder { +public: + explicit SkBasicEdgeBuilder(int clipShift) : fClipShift(clipShift) {} + + SkEdge** edgeList() { return (SkEdge**)fEdgeList; } + +private: + Combine combineVertical(const SkEdge* edge, SkEdge* last); + + char* allocEdges(size_t, size_t*) override; + SkRect recoverClip(const SkIRect&) const override; + + void addLine (const SkPoint pts[]) override; + void addQuad (const SkPoint pts[]) override; + void addCubic(const SkPoint pts[]) override; + Combine addPolyLine(const SkPoint pts[], char* edge, char** edgePtr) override; + + const int fClipShift; +}; + +class SkAnalyticEdgeBuilder final : public SkEdgeBuilder { +public: + SkAnalyticEdgeBuilder() {} + + SkAnalyticEdge** analyticEdgeList() { return (SkAnalyticEdge**)fEdgeList; } + +private: + Combine combineVertical(const SkAnalyticEdge* edge, SkAnalyticEdge* last); + + char* allocEdges(size_t, size_t*) override; + SkRect recoverClip(const SkIRect&) const override; + + void addLine (const SkPoint pts[]) override; + void addQuad (const SkPoint pts[]) override; + void addCubic(const SkPoint pts[]) override; + Combine addPolyLine(const SkPoint pts[], char* edge, char** edgePtr) override; +}; +#endif diff --git a/gfx/skia/skia/src/core/SkEdgeClipper.cpp b/gfx/skia/skia/src/core/SkEdgeClipper.cpp new file mode 100644 index 0000000000..6789b681e8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkEdgeClipper.cpp @@ -0,0 +1,604 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkEdgeClipper.h" + +#include "include/core/SkRect.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMacros.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkLineClipper.h" +#include "src/core/SkPathPriv.h" + +#include +#include + +static bool quick_reject(const SkRect& bounds, const SkRect& clip) { + return bounds.fTop >= clip.fBottom || bounds.fBottom <= clip.fTop; +} + +static inline void clamp_le(SkScalar& value, SkScalar max) { + if (value > max) { + value = max; + } +} + +static inline void clamp_ge(SkScalar& value, SkScalar min) { + if (value < min) { + value = min; + } +} + +/* src[] must be monotonic in Y. This routine copies src into dst, and sorts + it to be increasing in Y. If it had to reverse the order of the points, + it returns true, otherwise it returns false + */ +static bool sort_increasing_Y(SkPoint dst[], const SkPoint src[], int count) { + // we need the data to be monotonically increasing in Y + if (src[0].fY > src[count - 1].fY) { + for (int i = 0; i < count; i++) { + dst[i] = src[count - i - 1]; + } + return true; + } else { + memcpy(dst, src, count * sizeof(SkPoint)); + return false; + } +} + +bool SkEdgeClipper::clipLine(SkPoint p0, SkPoint p1, const SkRect& clip) { + fCurrPoint = fPoints; + fCurrVerb = fVerbs; + + SkPoint lines[SkLineClipper::kMaxPoints]; + const SkPoint pts[] = { p0, p1 }; + int lineCount = SkLineClipper::ClipLine(pts, clip, lines, fCanCullToTheRight); + for (int i = 0; i < lineCount; i++) { + this->appendLine(lines[i], lines[i + 1]); + } + + *fCurrVerb = SkPath::kDone_Verb; + fCurrPoint = fPoints; + fCurrVerb = fVerbs; + return SkPath::kDone_Verb != fVerbs[0]; +} + +/////////////////////////////////////////////////////////////////////////////// + +static bool chopMonoQuadAt(SkScalar c0, SkScalar c1, SkScalar c2, + SkScalar target, SkScalar* t) { + /* Solve F(t) = y where F(t) := [0](1-t)^2 + 2[1]t(1-t) + [2]t^2 + * We solve for t, using quadratic equation, hence we have to rearrange + * our cooefficents to look like At^2 + Bt + C + */ + SkScalar A = c0 - c1 - c1 + c2; + SkScalar B = 2*(c1 - c0); + SkScalar C = c0 - target; + + SkScalar roots[2]; // we only expect one, but make room for 2 for safety + int count = SkFindUnitQuadRoots(A, B, C, roots); + if (count) { + *t = roots[0]; + return true; + } + return false; +} + +static bool chopMonoQuadAtY(SkPoint pts[3], SkScalar y, SkScalar* t) { + return chopMonoQuadAt(pts[0].fY, pts[1].fY, pts[2].fY, y, t); +} + +static bool chopMonoQuadAtX(SkPoint pts[3], SkScalar x, SkScalar* t) { + return chopMonoQuadAt(pts[0].fX, pts[1].fX, pts[2].fX, x, t); +} + +// Modify pts[] in place so that it is clipped in Y to the clip rect +static void chop_quad_in_Y(SkPoint pts[3], const SkRect& clip) { + SkScalar t; + SkPoint tmp[5]; // for SkChopQuadAt + + // are we partially above + if (pts[0].fY < clip.fTop) { + if (chopMonoQuadAtY(pts, clip.fTop, &t)) { + // take the 2nd chopped quad + SkChopQuadAt(pts, tmp, t); + // clamp to clean up imprecise numerics in the chop + tmp[2].fY = clip.fTop; + clamp_ge(tmp[3].fY, clip.fTop); + + pts[0] = tmp[2]; + pts[1] = tmp[3]; + } else { + // if chopMonoQuadAtY failed, then we may have hit inexact numerics + // so we just clamp against the top + for (int i = 0; i < 3; i++) { + if (pts[i].fY < clip.fTop) { + pts[i].fY = clip.fTop; + } + } + } + } + + // are we partially below + if (pts[2].fY > clip.fBottom) { + if (chopMonoQuadAtY(pts, clip.fBottom, &t)) { + SkChopQuadAt(pts, tmp, t); + // clamp to clean up imprecise numerics in the chop + clamp_le(tmp[1].fY, clip.fBottom); + tmp[2].fY = clip.fBottom; + + pts[1] = tmp[1]; + pts[2] = tmp[2]; + } else { + // if chopMonoQuadAtY failed, then we may have hit inexact numerics + // so we just clamp against the bottom + for (int i = 0; i < 3; i++) { + if (pts[i].fY > clip.fBottom) { + pts[i].fY = clip.fBottom; + } + } + } + } +} + +// srcPts[] must be monotonic in X and Y +void SkEdgeClipper::clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip) { + SkPoint pts[3]; + bool reverse = sort_increasing_Y(pts, srcPts, 3); + + // are we completely above or below + if (pts[2].fY <= clip.fTop || pts[0].fY >= clip.fBottom) { + return; + } + + // Now chop so that pts is contained within clip in Y + chop_quad_in_Y(pts, clip); + + if (pts[0].fX > pts[2].fX) { + using std::swap; + swap(pts[0], pts[2]); + reverse = !reverse; + } + SkASSERT(pts[0].fX <= pts[1].fX); + SkASSERT(pts[1].fX <= pts[2].fX); + + // Now chop in X has needed, and record the segments + + if (pts[2].fX <= clip.fLeft) { // wholly to the left + this->appendVLine(clip.fLeft, pts[0].fY, pts[2].fY, reverse); + return; + } + if (pts[0].fX >= clip.fRight) { // wholly to the right + if (!this->canCullToTheRight()) { + this->appendVLine(clip.fRight, pts[0].fY, pts[2].fY, reverse); + } + return; + } + + SkScalar t; + SkPoint tmp[5]; // for SkChopQuadAt + + // are we partially to the left + if (pts[0].fX < clip.fLeft) { + if (chopMonoQuadAtX(pts, clip.fLeft, &t)) { + SkChopQuadAt(pts, tmp, t); + this->appendVLine(clip.fLeft, tmp[0].fY, tmp[2].fY, reverse); + // clamp to clean up imprecise numerics in the chop + tmp[2].fX = clip.fLeft; + clamp_ge(tmp[3].fX, clip.fLeft); + + pts[0] = tmp[2]; + pts[1] = tmp[3]; + } else { + // if chopMonoQuadAtY failed, then we may have hit inexact numerics + // so we just clamp against the left + this->appendVLine(clip.fLeft, pts[0].fY, pts[2].fY, reverse); + return; + } + } + + // are we partially to the right + if (pts[2].fX > clip.fRight) { + if (chopMonoQuadAtX(pts, clip.fRight, &t)) { + SkChopQuadAt(pts, tmp, t); + // clamp to clean up imprecise numerics in the chop + clamp_le(tmp[1].fX, clip.fRight); + tmp[2].fX = clip.fRight; + + this->appendQuad(tmp, reverse); + this->appendVLine(clip.fRight, tmp[2].fY, tmp[4].fY, reverse); + } else { + // if chopMonoQuadAtY failed, then we may have hit inexact numerics + // so we just clamp against the right + pts[1].fX = std::min(pts[1].fX, clip.fRight); + pts[2].fX = std::min(pts[2].fX, clip.fRight); + this->appendQuad(pts, reverse); + } + } else { // wholly inside the clip + this->appendQuad(pts, reverse); + } +} + +bool SkEdgeClipper::clipQuad(const SkPoint srcPts[3], const SkRect& clip) { + fCurrPoint = fPoints; + fCurrVerb = fVerbs; + + SkRect bounds; + bounds.setBounds(srcPts, 3); + + if (!quick_reject(bounds, clip)) { + SkPoint monoY[5]; + int countY = SkChopQuadAtYExtrema(srcPts, monoY); + for (int y = 0; y <= countY; y++) { + SkPoint monoX[5]; + int countX = SkChopQuadAtXExtrema(&monoY[y * 2], monoX); + for (int x = 0; x <= countX; x++) { + this->clipMonoQuad(&monoX[x * 2], clip); + SkASSERT(fCurrVerb - fVerbs < kMaxVerbs); + SkASSERT(fCurrPoint - fPoints <= kMaxPoints); + } + } + } + + *fCurrVerb = SkPath::kDone_Verb; + fCurrPoint = fPoints; + fCurrVerb = fVerbs; + return SkPath::kDone_Verb != fVerbs[0]; +} + +/////////////////////////////////////////////////////////////////////////////// + +static SkScalar mono_cubic_closestT(const SkScalar src[], SkScalar x) { + SkScalar t = 0.5f; + SkScalar lastT; + SkScalar bestT SK_INIT_TO_AVOID_WARNING; + SkScalar step = 0.25f; + SkScalar D = src[0]; + SkScalar A = src[6] + 3*(src[2] - src[4]) - D; + SkScalar B = 3*(src[4] - src[2] - src[2] + D); + SkScalar C = 3*(src[2] - D); + x -= D; + SkScalar closest = SK_ScalarMax; + do { + SkScalar loc = ((A * t + B) * t + C) * t; + SkScalar dist = SkScalarAbs(loc - x); + if (closest > dist) { + closest = dist; + bestT = t; + } + lastT = t; + t += loc < x ? step : -step; + step *= 0.5f; + } while (closest > 0.25f && lastT != t); + return bestT; +} + +static void chop_mono_cubic_at_y(SkPoint src[4], SkScalar y, SkPoint dst[7]) { + if (SkChopMonoCubicAtY(src, y, dst)) { + return; + } + SkChopCubicAt(src, dst, mono_cubic_closestT(&src->fY, y)); +} + +// Modify pts[] in place so that it is clipped in Y to the clip rect +static void chop_cubic_in_Y(SkPoint pts[4], const SkRect& clip) { + + // are we partially above + if (pts[0].fY < clip.fTop) { + SkPoint tmp[7]; + chop_mono_cubic_at_y(pts, clip.fTop, tmp); + + /* + * For a large range in the points, we can do a poor job of chopping, such that the t + * we computed resulted in the lower cubic still being partly above the clip. + * + * If just the first or first 2 Y values are above the fTop, we can just smash them + * down. If the first 3 Ys are above fTop, we can't smash all 3, as that can really + * distort the cubic. In this case, we take the first output (tmp[3..6] and treat it as + * a guess, and re-chop against fTop. Then we fall through to checking if we need to + * smash the first 1 or 2 Y values. + */ + if (tmp[3].fY < clip.fTop && tmp[4].fY < clip.fTop && tmp[5].fY < clip.fTop) { + SkPoint tmp2[4]; + memcpy(tmp2, &tmp[3].fX, 4 * sizeof(SkPoint)); + chop_mono_cubic_at_y(tmp2, clip.fTop, tmp); + } + + // tmp[3, 4].fY should all be to the below clip.fTop. + // Since we can't trust the numerics of the chopper, we force those conditions now + tmp[3].fY = clip.fTop; + clamp_ge(tmp[4].fY, clip.fTop); + + pts[0] = tmp[3]; + pts[1] = tmp[4]; + pts[2] = tmp[5]; + } + + // are we partially below + if (pts[3].fY > clip.fBottom) { + SkPoint tmp[7]; + chop_mono_cubic_at_y(pts, clip.fBottom, tmp); + tmp[3].fY = clip.fBottom; + clamp_le(tmp[2].fY, clip.fBottom); + + pts[1] = tmp[1]; + pts[2] = tmp[2]; + pts[3] = tmp[3]; + } +} + +static void chop_mono_cubic_at_x(SkPoint src[4], SkScalar x, SkPoint dst[7]) { + if (SkChopMonoCubicAtX(src, x, dst)) { + return; + } + SkChopCubicAt(src, dst, mono_cubic_closestT(&src->fX, x)); +} + +// srcPts[] must be monotonic in X and Y +void SkEdgeClipper::clipMonoCubic(const SkPoint src[4], const SkRect& clip) { + SkPoint pts[4]; + bool reverse = sort_increasing_Y(pts, src, 4); + + // are we completely above or below + if (pts[3].fY <= clip.fTop || pts[0].fY >= clip.fBottom) { + return; + } + + // Now chop so that pts is contained within clip in Y + chop_cubic_in_Y(pts, clip); + + if (pts[0].fX > pts[3].fX) { + using std::swap; + swap(pts[0], pts[3]); + swap(pts[1], pts[2]); + reverse = !reverse; + } + + // Now chop in X has needed, and record the segments + + if (pts[3].fX <= clip.fLeft) { // wholly to the left + this->appendVLine(clip.fLeft, pts[0].fY, pts[3].fY, reverse); + return; + } + if (pts[0].fX >= clip.fRight) { // wholly to the right + if (!this->canCullToTheRight()) { + this->appendVLine(clip.fRight, pts[0].fY, pts[3].fY, reverse); + } + return; + } + + // are we partially to the left + if (pts[0].fX < clip.fLeft) { + SkPoint tmp[7]; + chop_mono_cubic_at_x(pts, clip.fLeft, tmp); + this->appendVLine(clip.fLeft, tmp[0].fY, tmp[3].fY, reverse); + + // tmp[3, 4].fX should all be to the right of clip.fLeft. + // Since we can't trust the numerics of + // the chopper, we force those conditions now + tmp[3].fX = clip.fLeft; + clamp_ge(tmp[4].fX, clip.fLeft); + + pts[0] = tmp[3]; + pts[1] = tmp[4]; + pts[2] = tmp[5]; + } + + // are we partially to the right + if (pts[3].fX > clip.fRight) { + SkPoint tmp[7]; + chop_mono_cubic_at_x(pts, clip.fRight, tmp); + tmp[3].fX = clip.fRight; + clamp_le(tmp[2].fX, clip.fRight); + + this->appendCubic(tmp, reverse); + this->appendVLine(clip.fRight, tmp[3].fY, tmp[6].fY, reverse); + } else { // wholly inside the clip + this->appendCubic(pts, reverse); + } +} + +static SkRect compute_cubic_bounds(const SkPoint pts[4]) { + SkRect r; + r.setBounds(pts, 4); + return r; +} + +static bool too_big_for_reliable_float_math(const SkRect& r) { + // limit set as the largest float value for which we can still reliably compute things like + // - chopping at XY extrema + // - chopping at Y or X values for clipping + // + // Current value chosen just by experiment. Larger (and still succeeds) is always better. + // + const SkScalar limit = 1 << 22; + return r.fLeft < -limit || r.fTop < -limit || r.fRight > limit || r.fBottom > limit; +} + +bool SkEdgeClipper::clipCubic(const SkPoint srcPts[4], const SkRect& clip) { + fCurrPoint = fPoints; + fCurrVerb = fVerbs; + + const SkRect bounds = compute_cubic_bounds(srcPts); + // check if we're clipped out vertically + if (bounds.fBottom > clip.fTop && bounds.fTop < clip.fBottom) { + if (too_big_for_reliable_float_math(bounds)) { + // can't safely clip the cubic, so we give up and draw a line (which we can safely clip) + // + // If we rewrote chopcubicat*extrema and chopmonocubic using doubles, we could very + // likely always handle the cubic safely, but (it seems) at a big loss in speed, so + // we'd only want to take that alternate impl if needed. Perhaps a TODO to try it. + // + return this->clipLine(srcPts[0], srcPts[3], clip); + } else { + SkPoint monoY[10]; + int countY = SkChopCubicAtYExtrema(srcPts, monoY); + for (int y = 0; y <= countY; y++) { + SkPoint monoX[10]; + int countX = SkChopCubicAtXExtrema(&monoY[y * 3], monoX); + for (int x = 0; x <= countX; x++) { + this->clipMonoCubic(&monoX[x * 3], clip); + SkASSERT(fCurrVerb - fVerbs < kMaxVerbs); + SkASSERT(fCurrPoint - fPoints <= kMaxPoints); + } + } + } + } + + *fCurrVerb = SkPath::kDone_Verb; + fCurrPoint = fPoints; + fCurrVerb = fVerbs; + return SkPath::kDone_Verb != fVerbs[0]; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkEdgeClipper::appendLine(SkPoint p0, SkPoint p1) { + *fCurrVerb++ = SkPath::kLine_Verb; + fCurrPoint[0] = p0; + fCurrPoint[1] = p1; + fCurrPoint += 2; +} + +void SkEdgeClipper::appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse) { + *fCurrVerb++ = SkPath::kLine_Verb; + + if (reverse) { + using std::swap; + swap(y0, y1); + } + fCurrPoint[0].set(x, y0); + fCurrPoint[1].set(x, y1); + fCurrPoint += 2; +} + +void SkEdgeClipper::appendQuad(const SkPoint pts[3], bool reverse) { + *fCurrVerb++ = SkPath::kQuad_Verb; + + if (reverse) { + fCurrPoint[0] = pts[2]; + fCurrPoint[2] = pts[0]; + } else { + fCurrPoint[0] = pts[0]; + fCurrPoint[2] = pts[2]; + } + fCurrPoint[1] = pts[1]; + fCurrPoint += 3; +} + +void SkEdgeClipper::appendCubic(const SkPoint pts[4], bool reverse) { + *fCurrVerb++ = SkPath::kCubic_Verb; + + if (reverse) { + for (int i = 0; i < 4; i++) { + fCurrPoint[i] = pts[3 - i]; + } + } else { + memcpy(fCurrPoint, pts, 4 * sizeof(SkPoint)); + } + fCurrPoint += 4; +} + +SkPath::Verb SkEdgeClipper::next(SkPoint pts[]) { + SkPath::Verb verb = *fCurrVerb; + + switch (verb) { + case SkPath::kLine_Verb: + memcpy(pts, fCurrPoint, 2 * sizeof(SkPoint)); + fCurrPoint += 2; + fCurrVerb += 1; + break; + case SkPath::kQuad_Verb: + memcpy(pts, fCurrPoint, 3 * sizeof(SkPoint)); + fCurrPoint += 3; + fCurrVerb += 1; + break; + case SkPath::kCubic_Verb: + memcpy(pts, fCurrPoint, 4 * sizeof(SkPoint)); + fCurrPoint += 4; + fCurrVerb += 1; + break; + case SkPath::kDone_Verb: + break; + default: + SkDEBUGFAIL("unexpected verb in quadclippper2 iter"); + break; + } + return verb; +} + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG +static void assert_monotonic(const SkScalar coord[], int count) { + if (coord[0] > coord[(count - 1) * 2]) { + for (int i = 1; i < count; i++) { + SkASSERT(coord[2 * (i - 1)] >= coord[i * 2]); + } + } else if (coord[0] < coord[(count - 1) * 2]) { + for (int i = 1; i < count; i++) { + SkASSERT(coord[2 * (i - 1)] <= coord[i * 2]); + } + } else { + for (int i = 1; i < count; i++) { + SkASSERT(coord[2 * (i - 1)] == coord[i * 2]); + } + } +} + +void sk_assert_monotonic_y(const SkPoint pts[], int count) { + if (count > 1) { + assert_monotonic(&pts[0].fY, count); + } +} + +void sk_assert_monotonic_x(const SkPoint pts[], int count) { + if (count > 1) { + assert_monotonic(&pts[0].fX, count); + } +} +#endif + +void SkEdgeClipper::ClipPath(const SkPath& path, const SkRect& clip, bool canCullToTheRight, + void (*consume)(SkEdgeClipper*, bool newCtr, void* ctx), void* ctx) { + SkASSERT(path.isFinite()); + + SkAutoConicToQuads quadder; + const SkScalar conicTol = SK_Scalar1 / 4; + + SkPathEdgeIter iter(path); + SkEdgeClipper clipper(canCullToTheRight); + + while (auto e = iter.next()) { + switch (e.fEdge) { + case SkPathEdgeIter::Edge::kLine: + if (clipper.clipLine(e.fPts[0], e.fPts[1], clip)) { + consume(&clipper, e.fIsNewContour, ctx); + } + break; + case SkPathEdgeIter::Edge::kQuad: + if (clipper.clipQuad(e.fPts, clip)) { + consume(&clipper, e.fIsNewContour, ctx); + } + break; + case SkPathEdgeIter::Edge::kConic: { + const SkPoint* quadPts = quadder.computeQuads(e.fPts, iter.conicWeight(), conicTol); + for (int i = 0; i < quadder.countQuads(); ++i) { + if (clipper.clipQuad(quadPts, clip)) { + consume(&clipper, e.fIsNewContour, ctx); + } + quadPts += 2; + } + } break; + case SkPathEdgeIter::Edge::kCubic: + if (clipper.clipCubic(e.fPts, clip)) { + consume(&clipper, e.fIsNewContour, ctx); + } + break; + } + } +} diff --git a/gfx/skia/skia/src/core/SkEdgeClipper.h b/gfx/skia/skia/src/core/SkEdgeClipper.h new file mode 100644 index 0000000000..230646b246 --- /dev/null +++ b/gfx/skia/skia/src/core/SkEdgeClipper.h @@ -0,0 +1,69 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkEdgeClipper_DEFINED +#define SkEdgeClipper_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkDebug.h" + +struct SkRect; + +/** This is basically an iterator. It is initialized with an edge and a clip, + and then next() is called until it returns kDone_Verb. + */ +class SkEdgeClipper { +public: + SkEdgeClipper(bool canCullToTheRight) : fCanCullToTheRight(canCullToTheRight) {} + + bool clipLine(SkPoint p0, SkPoint p1, const SkRect& clip); + bool clipQuad(const SkPoint pts[3], const SkRect& clip); + bool clipCubic(const SkPoint pts[4], const SkRect& clip); + + SkPath::Verb next(SkPoint pts[]); + + bool canCullToTheRight() const { return fCanCullToTheRight; } + + /** + * Clips each segment from the path, and passes the result (in a clipper) to the + * consume proc. + */ + static void ClipPath(const SkPath& path, const SkRect& clip, bool canCullToTheRight, + void (*consume)(SkEdgeClipper*, bool newCtr, void* ctx), void* ctx); + +private: + SkPoint* fCurrPoint; + SkPath::Verb* fCurrVerb; + const bool fCanCullToTheRight; + + enum { + kMaxVerbs = 18, // max curvature in X and Y split cubic into 9 pieces, * (line + cubic) + kMaxPoints = 54 // 2 lines + 1 cubic require 6 points; times 9 pieces + }; + SkPoint fPoints[kMaxPoints]; + SkPath::Verb fVerbs[kMaxVerbs]; + + void clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip); + void clipMonoCubic(const SkPoint srcPts[4], const SkRect& clip); + void appendLine(SkPoint p0, SkPoint p1); + void appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse); + void appendQuad(const SkPoint pts[3], bool reverse); + void appendCubic(const SkPoint pts[4], bool reverse); +}; + +#ifdef SK_DEBUG + void sk_assert_monotonic_x(const SkPoint pts[], int count); + void sk_assert_monotonic_y(const SkPoint pts[], int count); +#else + #define sk_assert_monotonic_x(pts, count) + #define sk_assert_monotonic_y(pts, count) +#endif + +#endif diff --git a/gfx/skia/skia/src/core/SkEffectPriv.h b/gfx/skia/skia/src/core/SkEffectPriv.h new file mode 100644 index 0000000000..e1d5764efa --- /dev/null +++ b/gfx/skia/skia/src/core/SkEffectPriv.h @@ -0,0 +1,29 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEffectPriv_DEFINED +#define SkEffectPriv_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkColorType.h" + +class SkArenaAlloc; +class SkColorSpace; +class SkRasterPipeline; +class SkSurfaceProps; + +// Passed to effects that will add stages to rasterpipeline +struct SkStageRec { + SkRasterPipeline* fPipeline; + SkArenaAlloc* fAlloc; + SkColorType fDstColorType; + SkColorSpace* fDstCS; // may be nullptr + SkColor4f fPaintColor; + const SkSurfaceProps& fSurfaceProps; +}; + +#endif // SkEffectPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkEnumBitMask.h b/gfx/skia/skia/src/core/SkEnumBitMask.h new file mode 100644 index 0000000000..a04f6cd0b8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkEnumBitMask.h @@ -0,0 +1,87 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEnumBitMask_DEFINED +#define SkEnumBitMask_DEFINED + +#include "include/core/SkTypes.h" + +/** + * Wraps an enum that is used for flags, and enables masking with type safety. Example: + * + * enum class MyFlags { + * kNone = 0, + * kA = 1, + * kB = 2, + * kC = 4, + * }; + * + * MAKE_MASK_OPS(MyFlags) + * + * ... + * + * Mask flags = MyFlags::kA | MyFlags::kB; + * + * if (flags & MyFlags::kB) {} + * + * ... + */ +template +class SkEnumBitMask { +public: + SK_ALWAYS_INLINE constexpr SkEnumBitMask(E e) : SkEnumBitMask((int)e) {} + + SK_ALWAYS_INLINE constexpr operator bool() const { return fValue; } + + SK_ALWAYS_INLINE bool operator==(SkEnumBitMask m) const { return fValue == m.fValue; } + SK_ALWAYS_INLINE bool operator!=(SkEnumBitMask m) const { return fValue != m.fValue; } + + SK_ALWAYS_INLINE constexpr SkEnumBitMask operator|(SkEnumBitMask m) const { + return SkEnumBitMask(fValue | m.fValue); + } + SK_ALWAYS_INLINE constexpr SkEnumBitMask operator&(SkEnumBitMask m) const { + return SkEnumBitMask(fValue & m.fValue); + } + SK_ALWAYS_INLINE constexpr SkEnumBitMask operator^(SkEnumBitMask m) const { + return SkEnumBitMask(fValue ^ m.fValue); + } + SK_ALWAYS_INLINE constexpr SkEnumBitMask operator~() const { return SkEnumBitMask(~fValue); } + + SK_ALWAYS_INLINE SkEnumBitMask& operator|=(SkEnumBitMask m) { return *this = *this | m; } + SK_ALWAYS_INLINE SkEnumBitMask& operator&=(SkEnumBitMask m) { return *this = *this & m; } + SK_ALWAYS_INLINE SkEnumBitMask& operator^=(SkEnumBitMask m) { return *this = *this ^ m; } + +private: + SK_ALWAYS_INLINE constexpr explicit SkEnumBitMask(int value) : fValue(value) {} + + int fValue; +}; + +/** + * Defines functions that make it possible to use bitwise operators on an enum. + */ +#define SK_MAKE_BITMASK_OPS(E) \ + [[maybe_unused]] constexpr SkEnumBitMask operator|(E a, E b) { \ + return SkEnumBitMask(a) | b; \ + } \ + [[maybe_unused]] constexpr SkEnumBitMask operator&(E a, E b) { \ + return SkEnumBitMask(a) & b; \ + } \ + [[maybe_unused]] constexpr SkEnumBitMask operator^(E a, E b) { \ + return SkEnumBitMask(a) ^ b; \ + } \ + [[maybe_unused]] constexpr SkEnumBitMask operator~(E e) { \ + return ~SkEnumBitMask(e); \ + } \ + +#define SK_DECL_BITMASK_OPS_FRIENDS(E) \ + friend constexpr SkEnumBitMask operator|(E, E); \ + friend constexpr SkEnumBitMask operator&(E, E); \ + friend constexpr SkEnumBitMask operator^(E, E); \ + friend constexpr SkEnumBitMask operator~(E); \ + +#endif // SkEnumBitMask_DEFINED diff --git a/gfx/skia/skia/src/core/SkEnumerate.h b/gfx/skia/skia/src/core/SkEnumerate.h new file mode 100644 index 0000000000..ecc3bf390b --- /dev/null +++ b/gfx/skia/skia/src/core/SkEnumerate.h @@ -0,0 +1,114 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEnumerate_DEFINED +#define SkEnumerate_DEFINED + +#include +#include +#include +#include + +template +class SkEnumerate { + using Captured = decltype(*std::declval()); + template struct is_tuple : std::false_type {}; + template struct is_tuple> : std::true_type {}; + + // v must be a r-value to bind to temporary non-const references. + static constexpr auto MakeResult(size_t i, Captured&& v) { + if constexpr (is_tuple::value) { + return std::tuple_cat(std::tuple{i}, v); + } else { + // Capture v by reference instead of by value by using std::tie. + return std::tuple_cat(std::tuple{i}, std::tie(v)); + } + } + + using Result = decltype(MakeResult(0, std::declval())); + + class Iterator { + public: + using value_type = Result; + using difference_type = ptrdiff_t; + using pointer = value_type*; + using reference = value_type; + using iterator_category = std::input_iterator_tag; + constexpr Iterator(ptrdiff_t index, Iter it) : fIndex{index}, fIt{it} { } + constexpr Iterator(const Iterator&) = default; + constexpr Iterator operator++() { ++fIndex; ++fIt; return *this; } + constexpr Iterator operator++(int) { Iterator tmp(*this); operator++(); return tmp; } + constexpr bool operator==(const Iterator& rhs) const { return fIt == rhs.fIt; } + constexpr bool operator!=(const Iterator& rhs) const { return fIt != rhs.fIt; } + constexpr reference operator*() { return MakeResult(fIndex, *fIt); } + + private: + ptrdiff_t fIndex; + Iter fIt; + }; + +public: + constexpr SkEnumerate(Iter begin, Iter end) : SkEnumerate{0, begin, end} {} + explicit constexpr SkEnumerate(C&& c) + : fCollection{std::move(c)} + , fBeginIndex{0} + , fBegin{std::begin(fCollection)} + , fEnd{std::end(fCollection)} { } + constexpr SkEnumerate(const SkEnumerate& that) = default; + constexpr SkEnumerate& operator=(const SkEnumerate& that) { + fBegin = that.fBegin; + fEnd = that.fEnd; + return *this; + } + constexpr Iterator begin() const { return Iterator{fBeginIndex, fBegin}; } + constexpr Iterator end() const { return Iterator{fBeginIndex + this->ssize(), fEnd}; } + constexpr bool empty() const { return fBegin == fEnd; } + constexpr size_t size() const { return std::distance(fBegin, fEnd); } + constexpr ptrdiff_t ssize() const { return std::distance(fBegin, fEnd); } + constexpr SkEnumerate first(size_t n) { + SkASSERT(n <= this->size()); + ptrdiff_t deltaEnd = this->ssize() - n; + return SkEnumerate{fBeginIndex, fBegin, std::prev(fEnd, deltaEnd)}; + } + constexpr SkEnumerate last(size_t n) { + SkASSERT(n <= this->size()); + ptrdiff_t deltaBegin = this->ssize() - n; + return SkEnumerate{fBeginIndex + deltaBegin, std::next(fBegin, deltaBegin), fEnd}; + } + constexpr SkEnumerate subspan(size_t offset, size_t count) { + SkASSERT(offset < this->size()); + SkASSERT(count <= this->size() - offset); + auto newBegin = std::next(fBegin, offset); + return SkEnumerate(fBeginIndex + offset, newBegin, std::next(newBegin, count)); + } + +private: + constexpr SkEnumerate(ptrdiff_t beginIndex, Iter begin, Iter end) + : fBeginIndex{beginIndex} + , fBegin(begin) + , fEnd(end) {} + + C fCollection; + const ptrdiff_t fBeginIndex; + Iter fBegin; + Iter fEnd; +}; + +template ()))> +inline constexpr SkEnumerate SkMakeEnumerate(C& c) { + return SkEnumerate{std::begin(c), std::end(c)}; +} +template ()))> +inline constexpr SkEnumerate SkMakeEnumerate(C&& c) { + return SkEnumerate{std::forward(c)}; +} + +template ()))> +inline constexpr SkEnumerate SkMakeEnumerate(T (&a)[N]) { + return SkEnumerate{std::begin(a), std::end(a)}; +} +#endif // SkEnumerate_DEFINED diff --git a/gfx/skia/skia/src/core/SkExecutor.cpp b/gfx/skia/skia/src/core/SkExecutor.cpp new file mode 100644 index 0000000000..fe908ad35f --- /dev/null +++ b/gfx/skia/skia/src/core/SkExecutor.cpp @@ -0,0 +1,153 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkExecutor.h" +#include "include/private/SkSpinlock.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkSemaphore.h" +#include "include/private/base/SkTArray.h" +#include +#include + +using namespace skia_private; + +#if defined(SK_BUILD_FOR_WIN) + #include "src/base/SkLeanWindows.h" + static int num_cores() { + SYSTEM_INFO sysinfo; + GetNativeSystemInfo(&sysinfo); + return (int)sysinfo.dwNumberOfProcessors; + } +#else + #include + static int num_cores() { + return (int)sysconf(_SC_NPROCESSORS_ONLN); + } +#endif + +SkExecutor::~SkExecutor() {} + +// The default default SkExecutor is an SkTrivialExecutor, which just runs the work right away. +class SkTrivialExecutor final : public SkExecutor { + void add(std::function work) override { + work(); + } +}; + +static SkExecutor& trivial_executor() { + static auto* executor = new SkTrivialExecutor(); + return *executor; +} + +static SkExecutor* gDefaultExecutor = nullptr; + +SkExecutor& SkExecutor::GetDefault() { + if (gDefaultExecutor) { + return *gDefaultExecutor; + } + return trivial_executor(); +} + +void SkExecutor::SetDefault(SkExecutor* executor) { + gDefaultExecutor = executor; +} + +// We'll always push_back() new work, but pop from the front of deques or the back of SkTArray. +static inline std::function pop(std::deque>* list) { + std::function fn = std::move(list->front()); + list->pop_front(); + return fn; +} +static inline std::function pop(TArray>* list) { + std::function fn = std::move(list->back()); + list->pop_back(); + return fn; +} + +// An SkThreadPool is an executor that runs work on a fixed pool of OS threads. +template +class SkThreadPool final : public SkExecutor { +public: + explicit SkThreadPool(int threads, bool allowBorrowing) : fAllowBorrowing(allowBorrowing) { + for (int i = 0; i < threads; i++) { + fThreads.emplace_back(&Loop, this); + } + } + + ~SkThreadPool() override { + // Signal each thread that it's time to shut down. + for (int i = 0; i < fThreads.size(); i++) { + this->add(nullptr); + } + // Wait for each thread to shut down. + for (int i = 0; i < fThreads.size(); i++) { + fThreads[i].join(); + } + } + + void add(std::function work) override { + // Add some work to our pile of work to do. + { + SkAutoMutexExclusive lock(fWorkLock); + fWork.emplace_back(std::move(work)); + } + // Tell the Loop() threads to pick it up. + fWorkAvailable.signal(1); + } + + void borrow() override { + // If there is work waiting and we're allowed to borrow work, do it. + if (fAllowBorrowing && fWorkAvailable.try_wait()) { + SkAssertResult(this->do_work()); + } + } + +private: + // This method should be called only when fWorkAvailable indicates there's work to do. + bool do_work() { + std::function work; + { + SkAutoMutexExclusive lock(fWorkLock); + SkASSERT(!fWork.empty()); // TODO: if (fWork.empty()) { return true; } ? + work = pop(&fWork); + } + + if (!work) { + return false; // This is Loop()'s signal to shut down. + } + + work(); + return true; + } + + static void Loop(void* ctx) { + auto pool = (SkThreadPool*)ctx; + do { + pool->fWorkAvailable.wait(); + } while (pool->do_work()); + } + + // Both SkMutex and SkSpinlock can work here. + using Lock = SkMutex; + + TArray fThreads; + WorkList fWork; + Lock fWorkLock; + SkSemaphore fWorkAvailable; + bool fAllowBorrowing; +}; + +std::unique_ptr SkExecutor::MakeFIFOThreadPool(int threads, bool allowBorrowing) { + using WorkList = std::deque>; + return std::make_unique>(threads > 0 ? threads : num_cores(), + allowBorrowing); +} +std::unique_ptr SkExecutor::MakeLIFOThreadPool(int threads, bool allowBorrowing) { + using WorkList = TArray>; + return std::make_unique>(threads > 0 ? threads : num_cores(), + allowBorrowing); +} diff --git a/gfx/skia/skia/src/core/SkFDot6.h b/gfx/skia/skia/src/core/SkFDot6.h new file mode 100644 index 0000000000..36bc33370e --- /dev/null +++ b/gfx/skia/skia/src/core/SkFDot6.h @@ -0,0 +1,78 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFDot6_DEFINED +#define SkFDot6_DEFINED + +#include "include/core/SkScalar.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTo.h" + +typedef int32_t SkFDot6; + +/* This uses the magic number approach suggested here: + * http://stereopsis.com/sree/fpu2006.html and used in + * _cairo_fixed_from_double. It does banker's rounding + * (i.e. round to nearest even) + */ +inline SkFDot6 SkScalarRoundToFDot6(SkScalar x, int shift = 0) +{ + union { + double fDouble; + int32_t fBits[2]; + } tmp; + int fractionalBits = 6 + shift; + double magic = (1LL << (52 - (fractionalBits))) * 1.5; + + tmp.fDouble = SkScalarToDouble(x) + magic; +#ifdef SK_CPU_BENDIAN + return tmp.fBits[1]; +#else + return tmp.fBits[0]; +#endif +} + +#define SK_FDot6One (64) +#define SK_FDot6Half (32) + +#ifdef SK_DEBUG + inline SkFDot6 SkIntToFDot6(int x) { + SkASSERT(SkToS16(x) == x); + return x << 6; + } +#else + #define SkIntToFDot6(x) ((x) << 6) +#endif + +#define SkFDot6Floor(x) ((x) >> 6) +#define SkFDot6Ceil(x) (((x) + 63) >> 6) +#define SkFDot6Round(x) (((x) + 32) >> 6) + +#define SkFixedToFDot6(x) ((x) >> 10) + +inline SkFixed SkFDot6ToFixed(SkFDot6 x) { + SkASSERT((SkLeftShift(x, 10) >> 10) == x); + + return SkLeftShift(x, 10); +} + +#define SkScalarToFDot6(x) (SkFDot6)((x) * 64) +#define SkFDot6ToScalar(x) ((SkScalar)(x) * 0.015625f) +#define SkFDot6ToFloat SkFDot6ToScalar + +inline SkFixed SkFDot6Div(SkFDot6 a, SkFDot6 b) { + SkASSERT(b != 0); + + if (SkTFitsIn(a)) { + return SkLeftShift(a, 16) / b; + } else { + return SkFixedDiv(a, b); + } +} + +#endif diff --git a/gfx/skia/skia/src/core/SkFlattenable.cpp b/gfx/skia/skia/src/core/SkFlattenable.cpp new file mode 100644 index 0000000000..9fb121d675 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFlattenable.cpp @@ -0,0 +1,157 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkFlattenable.h" + +#include "include/core/SkData.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTDArray.h" +#include "src/core/SkPtrRecorder.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include +#include + +struct SkDeserialProcs; +struct SkSerialProcs; + +SkNamedFactorySet::SkNamedFactorySet() : fNextAddedFactory(0) {} + +uint32_t SkNamedFactorySet::find(SkFlattenable::Factory factory) { + uint32_t index = fFactorySet.find(factory); + if (index > 0) { + return index; + } + const char* name = SkFlattenable::FactoryToName(factory); + if (nullptr == name) { + return 0; + } + *fNames.append() = name; + return fFactorySet.add(factory); +} + +const char* SkNamedFactorySet::getNextAddedFactoryName() { + if (fNextAddedFactory < fNames.size()) { + return fNames[fNextAddedFactory++]; + } + return nullptr; +} + +/////////////////////////////////////////////////////////////////////////////// + +SkRefCntSet::~SkRefCntSet() { + // call this now, while our decPtr() is sill in scope + this->reset(); +} + +void SkRefCntSet::incPtr(void* ptr) { + ((SkRefCnt*)ptr)->ref(); +} + +void SkRefCntSet::decPtr(void* ptr) { + ((SkRefCnt*)ptr)->unref(); +} + +/////////////////////////////////////////////////////////////////////////////// + +namespace { + +struct Entry { + const char* fName; + SkFlattenable::Factory fFactory; +}; + +struct EntryComparator { + bool operator()(const Entry& a, const Entry& b) const { + return strcmp(a.fName, b.fName) < 0; + } + bool operator()(const Entry& a, const char* b) const { + return strcmp(a.fName, b) < 0; + } + bool operator()(const char* a, const Entry& b) const { + return strcmp(a, b.fName) < 0; + } +}; + +int gCount = 0; +Entry gEntries[128]; + +} // namespace + +void SkFlattenable::Finalize() { + std::sort(gEntries, gEntries + gCount, EntryComparator()); +} + +void SkFlattenable::Register(const char name[], Factory factory) { + SkASSERT(name); + SkASSERT(factory); + SkASSERT(gCount < (int)std::size(gEntries)); + + gEntries[gCount].fName = name; + gEntries[gCount].fFactory = factory; + gCount += 1; +} + +SkFlattenable::Factory SkFlattenable::NameToFactory(const char name[]) { + RegisterFlattenablesIfNeeded(); + + SkASSERT(std::is_sorted(gEntries, gEntries + gCount, EntryComparator())); + auto pair = std::equal_range(gEntries, gEntries + gCount, name, EntryComparator()); + if (pair.first == pair.second) { + return nullptr; + } + return pair.first->fFactory; +} + +const char* SkFlattenable::FactoryToName(Factory fact) { + RegisterFlattenablesIfNeeded(); + + const Entry* entries = gEntries; + for (int i = gCount - 1; i >= 0; --i) { + if (entries[i].fFactory == fact) { + return entries[i].fName; + } + } + return nullptr; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkFlattenable::serialize(const SkSerialProcs* procs) const { + SkBinaryWriteBuffer writer; + if (procs) { + writer.setSerialProcs(*procs); + } + writer.writeFlattenable(this); + size_t size = writer.bytesWritten(); + auto data = SkData::MakeUninitialized(size); + writer.writeToMemory(data->writable_data()); + return data; +} + +size_t SkFlattenable::serialize(void* memory, size_t memory_size, + const SkSerialProcs* procs) const { + SkBinaryWriteBuffer writer(memory, memory_size); + if (procs) { + writer.setSerialProcs(*procs); + } + writer.writeFlattenable(this); + return writer.usingInitialStorage() ? writer.bytesWritten() : 0u; +} + +sk_sp SkFlattenable::Deserialize(SkFlattenable::Type type, const void* data, + size_t size, const SkDeserialProcs* procs) { + SkReadBuffer buffer(data, size); + if (procs) { + buffer.setDeserialProcs(*procs); + } + return sk_sp(buffer.readFlattenable(type)); +} diff --git a/gfx/skia/skia/src/core/SkFont.cpp b/gfx/skia/skia/src/core/SkFont.cpp new file mode 100644 index 0000000000..84426788d5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFont.cpp @@ -0,0 +1,394 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkTLazy.h" +#include "src/base/SkUTF.h" +#include "src/base/SkUtils.h" +#include "src/core/SkDraw.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkPaintDefaults.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkStrikeSpec.h" + +using namespace skia_private; + +#define kDefault_Size SkPaintDefaults_TextSize +#define kDefault_Flags SkFont::kBaselineSnap_PrivFlag +#define kDefault_Edging SkFont::Edging::kAntiAlias +#define kDefault_Hinting SkPaintDefaults_Hinting + +static inline SkScalar valid_size(SkScalar size) { + return std::max(0, size); +} + +SkFont::SkFont(sk_sp face, SkScalar size, SkScalar scaleX, SkScalar skewX) + : fTypeface(std::move(face)) + , fSize(valid_size(size)) + , fScaleX(scaleX) + , fSkewX(skewX) + , fFlags(kDefault_Flags) + , fEdging(static_cast(kDefault_Edging)) + , fHinting(static_cast(kDefault_Hinting)) +{} + +SkFont::SkFont(sk_sp face, SkScalar size) : SkFont(std::move(face), size, 1, 0) {} + +SkFont::SkFont(sk_sp face) : SkFont(std::move(face), kDefault_Size, 1, 0) {} + +SkFont::SkFont() : SkFont(nullptr, kDefault_Size) {} + +bool SkFont::operator==(const SkFont& b) const { + return fTypeface.get() == b.fTypeface.get() && + fSize == b.fSize && + fScaleX == b.fScaleX && + fSkewX == b.fSkewX && + fFlags == b.fFlags && + fEdging == b.fEdging && + fHinting == b.fHinting; +} + +void SkFont::dump() const { + SkDebugf("typeface %p\n", fTypeface.get()); + SkDebugf("size %g\n", fSize); + SkDebugf("skewx %g\n", fSkewX); + SkDebugf("scalex %g\n", fScaleX); + SkDebugf("flags 0x%X\n", fFlags); + SkDebugf("edging %d\n", (unsigned)fEdging); + SkDebugf("hinting %d\n", (unsigned)fHinting); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static inline uint32_t set_clear_mask(uint32_t bits, bool cond, uint32_t mask) { + return cond ? bits | mask : bits & ~mask; +} + +void SkFont::setForceAutoHinting(bool predicate) { + fFlags = set_clear_mask(fFlags, predicate, kForceAutoHinting_PrivFlag); +} +void SkFont::setEmbeddedBitmaps(bool predicate) { + fFlags = set_clear_mask(fFlags, predicate, kEmbeddedBitmaps_PrivFlag); +} +void SkFont::setSubpixel(bool predicate) { + fFlags = set_clear_mask(fFlags, predicate, kSubpixel_PrivFlag); +} +void SkFont::setLinearMetrics(bool predicate) { + fFlags = set_clear_mask(fFlags, predicate, kLinearMetrics_PrivFlag); +} +void SkFont::setEmbolden(bool predicate) { + fFlags = set_clear_mask(fFlags, predicate, kEmbolden_PrivFlag); +} +void SkFont::setBaselineSnap(bool predicate) { + fFlags = set_clear_mask(fFlags, predicate, kBaselineSnap_PrivFlag); +} +void SkFont::setEdging(Edging e) { + fEdging = SkToU8(e); +} + +void SkFont::setHinting(SkFontHinting h) { + fHinting = SkToU8(h); +} + +void SkFont::setSize(SkScalar size) { + fSize = valid_size(size); +} +void SkFont::setScaleX(SkScalar scale) { + fScaleX = scale; +} +void SkFont::setSkewX(SkScalar skew) { + fSkewX = skew; +} + +SkFont SkFont::makeWithSize(SkScalar newSize) const { + SkFont font = *this; + font.setSize(newSize); + return font; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkScalar SkFont::setupForAsPaths(SkPaint* paint) { + constexpr uint32_t flagsToIgnore = kEmbeddedBitmaps_PrivFlag | + kForceAutoHinting_PrivFlag; + + fFlags = (fFlags & ~flagsToIgnore) | kSubpixel_PrivFlag; + this->setHinting(SkFontHinting::kNone); + + if (this->getEdging() == Edging::kSubpixelAntiAlias) { + this->setEdging(Edging::kAntiAlias); + } + + if (paint) { + paint->setStyle(SkPaint::kFill_Style); + paint->setPathEffect(nullptr); + } + SkScalar textSize = fSize; + this->setSize(SkIntToScalar(SkFontPriv::kCanonicalTextSizeForPaths)); + return textSize / SkFontPriv::kCanonicalTextSizeForPaths; +} + +bool SkFont::hasSomeAntiAliasing() const { + Edging edging = this->getEdging(); + return edging == SkFont::Edging::kAntiAlias + || edging == SkFont::Edging::kSubpixelAntiAlias; +} + +SkGlyphID SkFont::unicharToGlyph(SkUnichar uni) const { + return this->getTypefaceOrDefault()->unicharToGlyph(uni); +} + +void SkFont::unicharsToGlyphs(const SkUnichar uni[], int count, SkGlyphID glyphs[]) const { + this->getTypefaceOrDefault()->unicharsToGlyphs(uni, count, glyphs); +} + +int SkFont::textToGlyphs(const void* text, size_t byteLength, SkTextEncoding encoding, + SkGlyphID glyphs[], int maxGlyphCount) const { + return this->getTypefaceOrDefault()->textToGlyphs(text, byteLength, encoding, + glyphs, maxGlyphCount); +} + +SkScalar SkFont::measureText(const void* text, size_t length, SkTextEncoding encoding, + SkRect* bounds, const SkPaint* paint) const { + + SkAutoToGlyphs atg(*this, text, length, encoding); + const int glyphCount = atg.count(); + if (glyphCount == 0) { + if (bounds) { + bounds->setEmpty(); + } + return 0; + } + const SkGlyphID* glyphIDs = atg.glyphs(); + + auto [strikeSpec, strikeToSourceScale] = SkStrikeSpec::MakeCanonicalized(*this, paint); + SkBulkGlyphMetrics metrics{strikeSpec}; + SkSpan glyphs = metrics.glyphs(SkSpan(glyphIDs, glyphCount)); + + SkScalar width = 0; + if (bounds) { + *bounds = glyphs[0]->rect(); + width = glyphs[0]->advanceX(); + for (int i = 1; i < glyphCount; ++i) { + SkRect r = glyphs[i]->rect(); + r.offset(width, 0); + bounds->join(r); + width += glyphs[i]->advanceX(); + } + } else { + for (auto glyph : glyphs) { + width += glyph->advanceX(); + } + } + + if (strikeToSourceScale != 1) { + width *= strikeToSourceScale; + if (bounds) { + bounds->fLeft *= strikeToSourceScale; + bounds->fTop *= strikeToSourceScale; + bounds->fRight *= strikeToSourceScale; + bounds->fBottom *= strikeToSourceScale; + } + } + + return width; +} + +void SkFont::getWidthsBounds(const SkGlyphID glyphIDs[], + int count, + SkScalar widths[], + SkRect bounds[], + const SkPaint* paint) const { + auto [strikeSpec, strikeToSourceScale] = SkStrikeSpec::MakeCanonicalized(*this, paint); + SkBulkGlyphMetrics metrics{strikeSpec}; + SkSpan glyphs = metrics.glyphs(SkSpan(glyphIDs, count)); + + if (bounds) { + SkMatrix scaleMat = SkMatrix::Scale(strikeToSourceScale, strikeToSourceScale); + SkRect* cursor = bounds; + for (auto glyph : glyphs) { + scaleMat.mapRectScaleTranslate(cursor++, glyph->rect()); + } + } + + if (widths) { + SkScalar* cursor = widths; + for (auto glyph : glyphs) { + *cursor++ = glyph->advanceX() * strikeToSourceScale; + } + } +} + +void SkFont::getPos(const SkGlyphID glyphIDs[], int count, SkPoint pos[], SkPoint origin) const { + auto [strikeSpec, strikeToSourceScale] = SkStrikeSpec::MakeCanonicalized(*this); + SkBulkGlyphMetrics metrics{strikeSpec}; + SkSpan glyphs = metrics.glyphs(SkSpan(glyphIDs, count)); + + SkPoint sum = origin; + for (auto glyph : glyphs) { + *pos++ = sum; + sum += glyph->advanceVector() * strikeToSourceScale; + } +} + +void SkFont::getXPos( + const SkGlyphID glyphIDs[], int count, SkScalar xpos[], SkScalar origin) const { + + auto [strikeSpec, strikeToSourceScale] = SkStrikeSpec::MakeCanonicalized(*this); + SkBulkGlyphMetrics metrics{strikeSpec}; + SkSpan glyphs = metrics.glyphs(SkSpan(glyphIDs, count)); + + SkScalar loc = origin; + SkScalar* cursor = xpos; + for (auto glyph : glyphs) { + *cursor++ = loc; + loc += glyph->advanceX() * strikeToSourceScale; + } +} + +void SkFont::getPaths(const SkGlyphID glyphIDs[], int count, + void (*proc)(const SkPath*, const SkMatrix&, void*), void* ctx) const { + SkFont font(*this); + SkScalar scale = font.setupForAsPaths(nullptr); + const SkMatrix mx = SkMatrix::Scale(scale, scale); + + SkStrikeSpec strikeSpec = SkStrikeSpec::MakeWithNoDevice(font); + SkBulkGlyphMetricsAndPaths paths{strikeSpec}; + SkSpan glyphs = paths.glyphs(SkSpan(glyphIDs, count)); + + for (auto glyph : glyphs) { + proc(glyph->path(), mx, ctx); + } +} + +bool SkFont::getPath(SkGlyphID glyphID, SkPath* path) const { + struct Pair { + SkPath* fPath; + bool fWasSet; + } pair = { path, false }; + + this->getPaths(&glyphID, 1, [](const SkPath* orig, const SkMatrix& mx, void* ctx) { + Pair* pair = static_cast(ctx); + if (orig) { + orig->transform(mx, pair->fPath); + pair->fWasSet = true; + } + }, &pair); + return pair.fWasSet; +} + +SkScalar SkFont::getMetrics(SkFontMetrics* metrics) const { + + auto [strikeSpec, strikeToSourceScale] = SkStrikeSpec::MakeCanonicalized(*this, nullptr); + + SkFontMetrics storage; + if (nullptr == metrics) { + metrics = &storage; + } + + auto cache = strikeSpec.findOrCreateStrike(); + *metrics = cache->getFontMetrics(); + + if (strikeToSourceScale != 1) { + SkFontPriv::ScaleFontMetrics(metrics, strikeToSourceScale); + } + return metrics->fDescent - metrics->fAscent + metrics->fLeading; +} + +SkTypeface* SkFont::getTypefaceOrDefault() const { + return fTypeface ? fTypeface.get() : SkTypeface::GetDefaultTypeface(); +} + +sk_sp SkFont::refTypefaceOrDefault() const { + return fTypeface ? fTypeface : SkTypeface::MakeDefault(); +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkFontPriv::ScaleFontMetrics(SkFontMetrics* metrics, SkScalar scale) { + metrics->fTop *= scale; + metrics->fAscent *= scale; + metrics->fDescent *= scale; + metrics->fBottom *= scale; + metrics->fLeading *= scale; + metrics->fAvgCharWidth *= scale; + metrics->fMaxCharWidth *= scale; + metrics->fXMin *= scale; + metrics->fXMax *= scale; + metrics->fXHeight *= scale; + metrics->fCapHeight *= scale; + metrics->fUnderlineThickness *= scale; + metrics->fUnderlinePosition *= scale; + metrics->fStrikeoutThickness *= scale; + metrics->fStrikeoutPosition *= scale; +} + +SkRect SkFontPriv::GetFontBounds(const SkFont& font) { + SkMatrix m; + m.setScale(font.getSize() * font.getScaleX(), font.getSize()); + m.postSkew(font.getSkewX(), 0); + + SkTypeface* typeface = font.getTypefaceOrDefault(); + + SkRect bounds; + m.mapRect(&bounds, typeface->getBounds()); + return bounds; +} + +SkScalar SkFontPriv::ApproximateTransformedTextSize(const SkFont& font, const SkMatrix& matrix, + const SkPoint& textLocation) { + if (!matrix.hasPerspective()) { + return font.getSize() * matrix.getMaxScale(); + } else { + // approximate the scale since we can't get it directly from the matrix + SkScalar maxScaleSq = SkMatrixPriv::DifferentialAreaScale(matrix, textLocation); + if (SkScalarIsFinite(maxScaleSq) && !SkScalarNearlyZero(maxScaleSq)) { + return font.getSize() * SkScalarSqrt(maxScaleSq); + } else { + return -font.getSize(); + } + } +} + +int SkFontPriv::CountTextElements(const void* text, size_t byteLength, SkTextEncoding encoding) { + switch (encoding) { + case SkTextEncoding::kUTF8: + return SkUTF::CountUTF8(reinterpret_cast(text), byteLength); + case SkTextEncoding::kUTF16: + return SkUTF::CountUTF16(reinterpret_cast(text), byteLength); + case SkTextEncoding::kUTF32: + return byteLength >> 2; + case SkTextEncoding::kGlyphID: + return byteLength >> 1; + } + SkASSERT(false); + return 0; +} + +void SkFontPriv::GlyphsToUnichars(const SkFont& font, const SkGlyphID glyphs[], int count, + SkUnichar text[]) { + if (count <= 0) { + return; + } + + auto typeface = font.getTypefaceOrDefault(); + const unsigned numGlyphsInTypeface = typeface->countGlyphs(); + AutoTArray unichars(numGlyphsInTypeface); + typeface->getGlyphToUnicodeMap(unichars.get()); + + for (int i = 0; i < count; ++i) { + unsigned id = glyphs[i]; + text[i] = (id < numGlyphsInTypeface) ? unichars[id] : 0xFFFD; + } +} diff --git a/gfx/skia/skia/src/core/SkFontDescriptor.cpp b/gfx/skia/skia/src/core/SkFontDescriptor.cpp new file mode 100644 index 0000000000..7c82e19918 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontDescriptor.cpp @@ -0,0 +1,277 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkData.h" +#include "include/core/SkStream.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkStreamPriv.h" + +enum { + kInvalid = 0x00, + + // Related to a font request. + kFontFamilyName = 0x01, // int length, data[length] + kFullName = 0x04, // int length, data[length] + kPostscriptName = 0x06, // int length, data[length] + kWeight = 0x10, // scalar (1 - 1000) + kWidth = 0x11, // scalar (percentage, 100 is 'normal') + kSlant = 0x12, // scalar (cw angle, 14 is a normal right leaning oblique) + kItalic = 0x13, // scalar (0 is Roman, 1 is fully Italic) + + // Related to font data. Can also be used with a requested font. + kPaletteIndex = 0xF8, // int + kPaletteEntryOverrides = 0xF9, // int count, (int, u32)[count] + kFontVariation = 0xFA, // int count, (u32, scalar)[count] + + // Related to font data. + kFactoryId = 0xFC, // int + kFontIndex = 0xFD, // int + kSentinel = 0xFF, // no data +}; + +SkFontDescriptor::SkFontDescriptor() { } + +static bool SK_WARN_UNUSED_RESULT read_string(SkStream* stream, SkString* string) { + size_t length; + if (!stream->readPackedUInt(&length)) { return false; } + if (length > 0) { + if (StreamRemainingLengthIsBelow(stream, length)) { + return false; + } + string->resize(length); + if (stream->read(string->data(), length) != length) { return false; } + } + return true; +} + +static bool write_string(SkWStream* stream, const SkString& string, uint32_t id) { + if (string.isEmpty()) { return true; } + return stream->writePackedUInt(id) && + stream->writePackedUInt(string.size()) && + stream->write(string.c_str(), string.size()); +} + +static bool write_uint(SkWStream* stream, size_t n, uint32_t id) { + return stream->writePackedUInt(id) && + stream->writePackedUInt(n); +} + +static bool write_scalar(SkWStream* stream, SkScalar n, uint32_t id) { + return stream->writePackedUInt(id) && + stream->writeScalar(n); +} + +static size_t SK_WARN_UNUSED_RESULT read_id(SkStream* stream) { + size_t i; + if (!stream->readPackedUInt(&i)) { return kInvalid; } + return i; +} + +static constexpr SkScalar usWidths[9] { + 1, 2, 3, 4, 5, 6, 7, 8, 9 +}; +static constexpr SkScalar width_for_usWidth[0x10] = { + 50, + 50, 62.5, 75, 87.5, 100, 112.5, 125, 150, 200, + 200, 200, 200, 200, 200, 200 +}; + +bool SkFontDescriptor::Deserialize(SkStream* stream, SkFontDescriptor* result) { + size_t factoryId; + using FactoryIdType = decltype(result->fFactoryId); + + size_t coordinateCount; + using CoordinateCountType = decltype(result->fCoordinateCount); + + size_t index; + using CollectionIndexType = decltype(result->fCollectionIndex); + + size_t paletteIndex; + using PaletteIndexType = decltype(result->fPaletteIndex); + + size_t paletteEntryOverrideCount; + using PaletteEntryOverrideCountType = decltype(result->fPaletteEntryOverrideCount); + + size_t paletteEntryOverrideIndex; + using PaletteEntryOverrideIndexType = decltype(result->fPaletteEntryOverrides[0].index); + + SkScalar weight = SkFontStyle::kNormal_Weight; + SkScalar width = SkFontStyle::kNormal_Width; + SkScalar slant = 0; + SkScalar italic = 0; + + size_t styleBits; + if (!stream->readPackedUInt(&styleBits)) { return false; } + weight = ((styleBits >> 16) & 0xFFFF); + width = ((styleBits >> 8) & 0x000F)[width_for_usWidth]; + slant = ((styleBits >> 0) & 0x000F) != SkFontStyle::kUpright_Slant ? 14 : 0; + italic = ((styleBits >> 0) & 0x000F) == SkFontStyle::kItalic_Slant ? 1 : 0; + + for (size_t id; (id = read_id(stream)) != kSentinel;) { + switch (id) { + case kFontFamilyName: + if (!read_string(stream, &result->fFamilyName)) { return false; } + break; + case kFullName: + if (!read_string(stream, &result->fFullName)) { return false; } + break; + case kPostscriptName: + if (!read_string(stream, &result->fPostscriptName)) { return false; } + break; + case kWeight: + if (!stream->readScalar(&weight)) { return false; } + break; + case kWidth: + if (!stream->readScalar(&width)) { return false; } + break; + case kSlant: + if (!stream->readScalar(&slant)) { return false; } + break; + case kItalic: + if (!stream->readScalar(&italic)) { return false; } + break; + case kFontVariation: + if (!stream->readPackedUInt(&coordinateCount)) { return false; } + if (!SkTFitsIn(coordinateCount)) { return false; } + if (StreamRemainingLengthIsBelow(stream, coordinateCount)) { + return false; + } + result->fCoordinateCount = SkTo(coordinateCount); + + result->fVariation.reset(coordinateCount); + for (size_t i = 0; i < coordinateCount; ++i) { + if (!stream->readU32(&result->fVariation[i].axis)) { return false; } + if (!stream->readScalar(&result->fVariation[i].value)) { return false; } + } + break; + case kFontIndex: + if (!stream->readPackedUInt(&index)) { return false; } + if (!SkTFitsIn(index)) { return false; } + result->fCollectionIndex = SkTo(index); + break; + case kPaletteIndex: + if (!stream->readPackedUInt(&paletteIndex)) { return false; } + if (!SkTFitsIn(paletteIndex)) { return false; } + result->fPaletteIndex = SkTo(paletteIndex); + break; + case kPaletteEntryOverrides: + if (!stream->readPackedUInt(&paletteEntryOverrideCount)) { return false; } + if (!SkTFitsIn(paletteEntryOverrideCount)) { + return false; + } + if (StreamRemainingLengthIsBelow(stream, paletteEntryOverrideCount)) { + return false; + } + result->fPaletteEntryOverrideCount = + SkTo(paletteEntryOverrideCount); + + result->fPaletteEntryOverrides.reset(paletteEntryOverrideCount); + for (size_t i = 0; i < paletteEntryOverrideCount; ++i) { + if (!stream->readPackedUInt(&paletteEntryOverrideIndex)) { return false; } + if (!SkTFitsIn(paletteEntryOverrideIndex)) { + return false; + } + result->fPaletteEntryOverrides[i].index = + SkTo(paletteEntryOverrideIndex); + if (!stream->readU32(&result->fPaletteEntryOverrides[i].color)) { + return false; + } + } + break; + case kFactoryId: + if (!stream->readPackedUInt(&factoryId)) { return false; } + if (!SkTFitsIn(factoryId)) { return false; } + result->fFactoryId = SkTo(factoryId); + break; + default: + SkDEBUGFAIL("Unknown id used by a font descriptor"); + return false; + } + } + + SkFontStyle::Slant slantEnum = SkFontStyle::kUpright_Slant; + if (slant != 0) { slantEnum = SkFontStyle::kOblique_Slant; } + if (0 < italic) { slantEnum = SkFontStyle::kItalic_Slant; } + SkFontStyle::Width widthEnum = SkFontStyleWidthForWidthAxisValue(width); + result->fStyle = SkFontStyle(SkScalarRoundToInt(weight), widthEnum, slantEnum); + + size_t length; + if (!stream->readPackedUInt(&length)) { return false; } + if (length > 0) { + if (StreamRemainingLengthIsBelow(stream, length)) { + return false; + } + sk_sp data(SkData::MakeUninitialized(length)); + if (stream->read(data->writable_data(), length) != length) { + SkDEBUGFAIL("Could not read font data"); + return false; + } + result->fStream = SkMemoryStream::Make(std::move(data)); + } + return true; +} + +void SkFontDescriptor::serialize(SkWStream* stream) const { + uint32_t styleBits = (fStyle.weight() << 16) | (fStyle.width() << 8) | (fStyle.slant()); + stream->writePackedUInt(styleBits); + + write_string(stream, fFamilyName, kFontFamilyName); + write_string(stream, fFullName, kFullName); + write_string(stream, fPostscriptName, kPostscriptName); + + write_scalar(stream, fStyle.weight(), kWeight); + write_scalar(stream, fStyle.width()[width_for_usWidth], kWidth); + write_scalar(stream, fStyle.slant() == SkFontStyle::kUpright_Slant ? 0 : 14, kSlant); + write_scalar(stream, fStyle.slant() == SkFontStyle::kItalic_Slant ? 1 : 0, kItalic); + + if (fCollectionIndex > 0) { + write_uint(stream, fCollectionIndex, kFontIndex); + } + if (fPaletteIndex > 0) { + write_uint(stream, fPaletteIndex, kPaletteIndex); + } + if (fCoordinateCount > 0) { + write_uint(stream, fCoordinateCount, kFontVariation); + for (int i = 0; i < fCoordinateCount; ++i) { + stream->write32(fVariation[i].axis); + stream->writeScalar(fVariation[i].value); + } + } + if (fPaletteEntryOverrideCount > 0) { + int nonNegativePaletteOverrideIndexes = 0; + for (int i = 0; i < fPaletteEntryOverrideCount; ++i) { + if (0 <= fPaletteEntryOverrides[i].index) { + ++nonNegativePaletteOverrideIndexes; + } + } + write_uint(stream, nonNegativePaletteOverrideIndexes, kPaletteEntryOverrides); + for (int i = 0; i < fPaletteEntryOverrideCount; ++i) { + if (0 <= fPaletteEntryOverrides[i].index) { + stream->writePackedUInt(fPaletteEntryOverrides[i].index); + stream->write32(fPaletteEntryOverrides[i].color); + } + } + } + + write_uint(stream, fFactoryId, kFactoryId); + + stream->writePackedUInt(kSentinel); + + if (fStream) { + std::unique_ptr fontStream = fStream->duplicate(); + size_t length = fontStream->getLength(); + stream->writePackedUInt(length); + stream->writeStream(fontStream.get(), length); + } else { + stream->writePackedUInt(0); + } +} + +SkFontStyle::Width SkFontDescriptor::SkFontStyleWidthForWidthAxisValue(SkScalar width) { + int usWidth = SkScalarRoundToInt(SkScalarInterpFunc(width, &width_for_usWidth[1], usWidths, 9)); + return static_cast(usWidth); +} diff --git a/gfx/skia/skia/src/core/SkFontDescriptor.h b/gfx/skia/skia/src/core/SkFontDescriptor.h new file mode 100644 index 0000000000..b4437d73e3 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontDescriptor.h @@ -0,0 +1,158 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontDescriptor_DEFINED +#define SkFontDescriptor_DEFINED + +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTemplates.h" + +class SkFontData { +public: + /** Makes a copy of the data in 'axis'. */ + SkFontData(std::unique_ptr stream, int index, int paletteIndex, + const SkFixed* axis, int axisCount, + const SkFontArguments::Palette::Override* paletteOverrides, int paletteOverrideCount) + : fStream(std::move(stream)) + , fIndex(index) + , fPaletteIndex(paletteIndex) + , fAxisCount(axisCount) + , fPaletteOverrideCount(paletteOverrideCount) + , fAxis(fAxisCount) + , fPaletteOverrides(fPaletteOverrideCount) + { + for (int i = 0; i < fAxisCount; ++i) { + fAxis[i] = axis[i]; + } + for (int i = 0; i < fPaletteOverrideCount; ++i) { + fPaletteOverrides[i] = paletteOverrides[i]; + } + } + + SkFontData(const SkFontData& that) + : fStream(that.fStream->duplicate()) + , fIndex(that.fIndex) + , fPaletteIndex(that.fPaletteIndex) + , fAxisCount(that.fAxisCount) + , fPaletteOverrideCount(that.fPaletteOverrideCount) + , fAxis(fAxisCount) + , fPaletteOverrides(fPaletteOverrideCount) + { + for (int i = 0; i < fAxisCount; ++i) { + fAxis[i] = that.fAxis[i]; + } + for (int i = 0; i < fPaletteOverrideCount; ++i) { + fPaletteOverrides[i] = that.fPaletteOverrides[i]; + } + } + bool hasStream() const { return fStream != nullptr; } + std::unique_ptr detachStream() { return std::move(fStream); } + SkStreamAsset* getStream() { return fStream.get(); } + SkStreamAsset const* getStream() const { return fStream.get(); } + int getIndex() const { return fIndex; } + int getAxisCount() const { return fAxisCount; } + const SkFixed* getAxis() const { return fAxis.get(); } + int getPaletteIndex() const { return fPaletteIndex; } + int getPaletteOverrideCount() const { return fPaletteOverrideCount; } + const SkFontArguments::Palette::Override* getPaletteOverrides() const { + return fPaletteOverrides.get(); + } + +private: + std::unique_ptr fStream; + int fIndex; + int fPaletteIndex; + int fAxisCount; + int fPaletteOverrideCount; + skia_private::AutoSTMalloc<4, SkFixed> fAxis; + skia_private::AutoSTMalloc<4, SkFontArguments::Palette::Override> fPaletteOverrides; +}; + +class SkFontDescriptor : SkNoncopyable { +public: + SkFontDescriptor(); + // Does not affect ownership of SkStream. + static bool Deserialize(SkStream*, SkFontDescriptor* result); + + void serialize(SkWStream*) const; + + SkFontStyle getStyle() const { return fStyle; } + void setStyle(SkFontStyle style) { fStyle = style; } + + const char* getFamilyName() const { return fFamilyName.c_str(); } + const char* getFullName() const { return fFullName.c_str(); } + const char* getPostscriptName() const { return fPostscriptName.c_str(); } + + void setFamilyName(const char* name) { fFamilyName.set(name); } + void setFullName(const char* name) { fFullName.set(name); } + void setPostscriptName(const char* name) { fPostscriptName.set(name); } + + bool hasStream() const { return bool(fStream); } + std::unique_ptr dupStream() const { return fStream->duplicate(); } + int getCollectionIndex() const { return fCollectionIndex; } + int getPaletteIndex() const { return fPaletteIndex; } + int getVariationCoordinateCount() const { return fCoordinateCount; } + const SkFontArguments::VariationPosition::Coordinate* getVariation() const { + return fVariation.get(); + } + int getPaletteEntryOverrideCount() const { return fPaletteEntryOverrideCount; } + const SkFontArguments::Palette::Override* getPaletteEntryOverrides() const { + return fPaletteEntryOverrides.get(); + } + SkTypeface::FactoryId getFactoryId() { + return fFactoryId; + } + + std::unique_ptr detachStream() { return std::move(fStream); } + void setStream(std::unique_ptr stream) { fStream = std::move(stream); } + void setCollectionIndex(int collectionIndex) { fCollectionIndex = collectionIndex; } + void setPaletteIndex(int paletteIndex) { fPaletteIndex = paletteIndex; } + SkFontArguments::VariationPosition::Coordinate* setVariationCoordinates(int coordinateCount) { + fCoordinateCount = coordinateCount; + return fVariation.reset(coordinateCount); + } + SkFontArguments::Palette::Override* setPaletteEntryOverrides(int paletteEntryOverrideCount) { + fPaletteEntryOverrideCount = paletteEntryOverrideCount; + return fPaletteEntryOverrides.reset(paletteEntryOverrideCount); + } + void setFactoryId(SkTypeface::FactoryId factoryId) { + fFactoryId = factoryId; + } + + SkFontArguments getFontArguments() const { + return SkFontArguments() + .setCollectionIndex(this->getCollectionIndex()) + .setVariationDesignPosition({this->getVariation(),this->getVariationCoordinateCount()}) + .setPalette({this->getPaletteIndex(), + this->getPaletteEntryOverrides(), + this->getPaletteEntryOverrideCount()}); + } + static SkFontStyle::Width SkFontStyleWidthForWidthAxisValue(SkScalar width); + +private: + SkString fFamilyName; + SkString fFullName; + SkString fPostscriptName; + SkFontStyle fStyle; + + std::unique_ptr fStream; + int fCollectionIndex = 0; + using Coordinates = + skia_private::AutoSTMalloc<4, SkFontArguments::VariationPosition::Coordinate>; + int fCoordinateCount = 0; + Coordinates fVariation; + int fPaletteIndex = 0; + int fPaletteEntryOverrideCount = 0; + skia_private::AutoTMalloc fPaletteEntryOverrides; + SkTypeface::FactoryId fFactoryId = 0; +}; + +#endif // SkFontDescriptor_DEFINED diff --git a/gfx/skia/skia/src/core/SkFontMetricsPriv.cpp b/gfx/skia/skia/src/core/SkFontMetricsPriv.cpp new file mode 100644 index 0000000000..484911a413 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontMetricsPriv.cpp @@ -0,0 +1,60 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/core/SkFontMetricsPriv.h" + +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +#include + +void SkFontMetricsPriv::Flatten(SkWriteBuffer& buffer, const SkFontMetrics& metrics) { + buffer.writeUInt(metrics.fFlags); + buffer.writeScalar(metrics.fTop); + buffer.writeScalar(metrics.fAscent); + buffer.writeScalar(metrics.fDescent); + buffer.writeScalar(metrics.fBottom); + buffer.writeScalar(metrics.fLeading); + buffer.writeScalar(metrics.fAvgCharWidth); + buffer.writeScalar(metrics.fMaxCharWidth); + buffer.writeScalar(metrics.fXMin); + buffer.writeScalar(metrics.fXMax); + buffer.writeScalar(metrics.fXHeight); + buffer.writeScalar(metrics.fCapHeight); + buffer.writeScalar(metrics.fUnderlineThickness); + buffer.writeScalar(metrics.fUnderlinePosition); + buffer.writeScalar(metrics.fStrikeoutThickness); + buffer.writeScalar(metrics.fStrikeoutPosition); +} + +std::optional SkFontMetricsPriv::MakeFromBuffer(SkReadBuffer& buffer) { + SkASSERT(buffer.isValid()); + + SkFontMetrics metrics; + metrics.fFlags = buffer.readUInt(); + metrics.fTop = buffer.readScalar(); + metrics.fAscent = buffer.readScalar(); + metrics.fDescent = buffer.readScalar(); + metrics.fBottom = buffer.readScalar(); + metrics.fLeading = buffer.readScalar(); + metrics.fAvgCharWidth = buffer.readScalar(); + metrics.fMaxCharWidth = buffer.readScalar(); + metrics.fXMin = buffer.readScalar(); + metrics.fXMax = buffer.readScalar(); + metrics.fXHeight = buffer.readScalar(); + metrics.fCapHeight = buffer.readScalar(); + metrics.fUnderlineThickness = buffer.readScalar(); + metrics.fUnderlinePosition = buffer.readScalar(); + metrics.fStrikeoutThickness = buffer.readScalar(); + metrics.fStrikeoutPosition = buffer.readScalar(); + + // All the reads above were valid, so return the metrics. + if (buffer.isValid()) { + return metrics; + } + + return std::nullopt; +} diff --git a/gfx/skia/skia/src/core/SkFontMetricsPriv.h b/gfx/skia/skia/src/core/SkFontMetricsPriv.h new file mode 100644 index 0000000000..a39e0b4b53 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontMetricsPriv.h @@ -0,0 +1,23 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMetricsPriv_DEFINED +#define SkFontMetricsPriv_DEFINED + +#include "include/core/SkFontMetrics.h" + +#include + +class SkReadBuffer; +class SkWriteBuffer; + +class SkFontMetricsPriv { +public: + static void Flatten(SkWriteBuffer& buffer, const SkFontMetrics& metrics); + static std::optional MakeFromBuffer(SkReadBuffer& buffer); +}; +#endif //SkFontMetricsPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkFontMgr.cpp b/gfx/skia/skia/src/core/SkFontMgr.cpp new file mode 100644 index 0000000000..74e2ea10f4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontMgr.cpp @@ -0,0 +1,287 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkOnce.h" +#include "src/core/SkFontDescriptor.h" + +class SkFontStyle; +class SkTypeface; + +class SkEmptyFontStyleSet : public SkFontStyleSet { +public: + int count() override { return 0; } + void getStyle(int, SkFontStyle*, SkString*) override { + SkDEBUGFAIL("SkFontStyleSet::getStyle called on empty set"); + } + SkTypeface* createTypeface(int index) override { + SkDEBUGFAIL("SkFontStyleSet::createTypeface called on empty set"); + return nullptr; + } + SkTypeface* matchStyle(const SkFontStyle&) override { + return nullptr; + } +}; + +SkFontStyleSet* SkFontStyleSet::CreateEmpty() { return new SkEmptyFontStyleSet; } + +/////////////////////////////////////////////////////////////////////////////// + +class SkEmptyFontMgr : public SkFontMgr { +protected: + int onCountFamilies() const override { + return 0; + } + void onGetFamilyName(int index, SkString* familyName) const override { + SkDEBUGFAIL("onGetFamilyName called with bad index"); + } + SkFontStyleSet* onCreateStyleSet(int index) const override { + SkDEBUGFAIL("onCreateStyleSet called with bad index"); + return nullptr; + } + SkFontStyleSet* onMatchFamily(const char[]) const override { + return SkFontStyleSet::CreateEmpty(); + } + + SkTypeface* onMatchFamilyStyle(const char[], const SkFontStyle&) const override { + return nullptr; + } + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle& style, + const char* bcp47[], + int bcp47Count, + SkUnichar character) const override { + return nullptr; + } + + sk_sp onMakeFromData(sk_sp, int) const override { + return nullptr; + } + sk_sp onMakeFromStreamIndex(std::unique_ptr, int) const override { + return nullptr; + } + sk_sp onMakeFromStreamArgs(std::unique_ptr, + const SkFontArguments&) const override { + return nullptr; + } + sk_sp onMakeFromFile(const char[], int) const override { + return nullptr; + } + sk_sp onLegacyMakeTypeface(const char [], SkFontStyle) const override { + return nullptr; + } +}; + +static SkFontStyleSet* emptyOnNull(SkFontStyleSet* fsset) { + if (nullptr == fsset) { + fsset = SkFontStyleSet::CreateEmpty(); + } + return fsset; +} + +int SkFontMgr::countFamilies() const { + return this->onCountFamilies(); +} + +void SkFontMgr::getFamilyName(int index, SkString* familyName) const { + this->onGetFamilyName(index, familyName); +} + +SkFontStyleSet* SkFontMgr::createStyleSet(int index) const { + return emptyOnNull(this->onCreateStyleSet(index)); +} + +SkFontStyleSet* SkFontMgr::matchFamily(const char familyName[]) const { + return emptyOnNull(this->onMatchFamily(familyName)); +} + +SkTypeface* SkFontMgr::matchFamilyStyle(const char familyName[], + const SkFontStyle& fs) const { + return this->onMatchFamilyStyle(familyName, fs); +} + +SkTypeface* SkFontMgr::matchFamilyStyleCharacter(const char familyName[], const SkFontStyle& style, + const char* bcp47[], int bcp47Count, + SkUnichar character) const { + return this->onMatchFamilyStyleCharacter(familyName, style, bcp47, bcp47Count, character); +} + +sk_sp SkFontMgr::makeFromData(sk_sp data, int ttcIndex) const { + if (nullptr == data) { + return nullptr; + } + return this->onMakeFromData(std::move(data), ttcIndex); +} + +sk_sp SkFontMgr::makeFromStream(std::unique_ptr stream, + int ttcIndex) const { + if (nullptr == stream) { + return nullptr; + } + return this->onMakeFromStreamIndex(std::move(stream), ttcIndex); +} + +sk_sp SkFontMgr::makeFromStream(std::unique_ptr stream, + const SkFontArguments& args) const { + if (nullptr == stream) { + return nullptr; + } + return this->onMakeFromStreamArgs(std::move(stream), args); +} + +sk_sp SkFontMgr::makeFromFile(const char path[], int ttcIndex) const { + if (nullptr == path) { + return nullptr; + } + return this->onMakeFromFile(path, ttcIndex); +} + +sk_sp SkFontMgr::legacyMakeTypeface(const char familyName[], SkFontStyle style) const { + return this->onLegacyMakeTypeface(familyName, style); +} + +sk_sp SkFontMgr::RefEmpty() { + static SkEmptyFontMgr singleton; + return sk_ref_sp(&singleton); +} + +// A global function pointer that's not declared, but can be overriden at startup by test tools. +sk_sp (*gSkFontMgr_DefaultFactory)() = nullptr; + +sk_sp SkFontMgr::RefDefault() { + static SkOnce once; + static sk_sp singleton; + + once([]{ + sk_sp fm = gSkFontMgr_DefaultFactory ? gSkFontMgr_DefaultFactory() + : SkFontMgr::Factory(); + singleton = fm ? std::move(fm) : RefEmpty(); + }); + return singleton; +} + +/** +* Width has the greatest priority. +* If the value of pattern.width is 5 (normal) or less, +* narrower width values are checked first, then wider values. +* If the value of pattern.width is greater than 5 (normal), +* wider values are checked first, followed by narrower values. +* +* Italic/Oblique has the next highest priority. +* If italic requested and there is some italic font, use it. +* If oblique requested and there is some oblique font, use it. +* If italic requested and there is some oblique font, use it. +* If oblique requested and there is some italic font, use it. +* +* Exact match. +* If pattern.weight < 400, weights below pattern.weight are checked +* in descending order followed by weights above pattern.weight +* in ascending order until a match is found. +* If pattern.weight > 500, weights above pattern.weight are checked +* in ascending order followed by weights below pattern.weight +* in descending order until a match is found. +* If pattern.weight is 400, 500 is checked first +* and then the rule for pattern.weight < 400 is used. +* If pattern.weight is 500, 400 is checked first +* and then the rule for pattern.weight < 400 is used. +*/ +SkTypeface* SkFontStyleSet::matchStyleCSS3(const SkFontStyle& pattern) { + int count = this->count(); + if (0 == count) { + return nullptr; + } + + struct Score { + int score; + int index; + Score& operator +=(int rhs) { this->score += rhs; return *this; } + Score& operator <<=(int rhs) { this->score <<= rhs; return *this; } + bool operator <(const Score& that) { return this->score < that.score; } + }; + + Score maxScore = { 0, 0 }; + for (int i = 0; i < count; ++i) { + SkFontStyle current; + this->getStyle(i, ¤t, nullptr); + Score currentScore = { 0, i }; + + // CSS stretch / SkFontStyle::Width + // Takes priority over everything else. + if (pattern.width() <= SkFontStyle::kNormal_Width) { + if (current.width() <= pattern.width()) { + currentScore += 10 - pattern.width() + current.width(); + } else { + currentScore += 10 - current.width(); + } + } else { + if (current.width() > pattern.width()) { + currentScore += 10 + pattern.width() - current.width(); + } else { + currentScore += current.width(); + } + } + currentScore <<= 8; + + // CSS style (normal, italic, oblique) / SkFontStyle::Slant (upright, italic, oblique) + // Takes priority over all valid weights. + static_assert(SkFontStyle::kUpright_Slant == 0 && + SkFontStyle::kItalic_Slant == 1 && + SkFontStyle::kOblique_Slant == 2, + "SkFontStyle::Slant values not as required."); + SkASSERT(0 <= pattern.slant() && pattern.slant() <= 2 && + 0 <= current.slant() && current.slant() <= 2); + static const int score[3][3] = { + /* Upright Italic Oblique [current]*/ + /* Upright */ { 3 , 1 , 2 }, + /* Italic */ { 1 , 3 , 2 }, + /* Oblique */ { 1 , 2 , 3 }, + /* [pattern] */ + }; + currentScore += score[pattern.slant()][current.slant()]; + currentScore <<= 8; + + // Synthetics (weight, style) [no stretch synthetic?] + + // CSS weight / SkFontStyle::Weight + // The 'closer' to the target weight, the higher the score. + // 1000 is the 'heaviest' recognized weight + if (pattern.weight() == current.weight()) { + currentScore += 1000; + // less than 400 prefer lighter weights + } else if (pattern.weight() < 400) { + if (current.weight() <= pattern.weight()) { + currentScore += 1000 - pattern.weight() + current.weight(); + } else { + currentScore += 1000 - current.weight(); + } + // between 400 and 500 prefer heavier up to 500, then lighter weights + } else if (pattern.weight() <= 500) { + if (current.weight() >= pattern.weight() && current.weight() <= 500) { + currentScore += 1000 + pattern.weight() - current.weight(); + } else if (current.weight() <= pattern.weight()) { + currentScore += 500 + current.weight(); + } else { + currentScore += 1000 - current.weight(); + } + // greater than 500 prefer heavier weights + } else if (pattern.weight() > 500) { + if (current.weight() > pattern.weight()) { + currentScore += 1000 + pattern.weight() - current.weight(); + } else { + currentScore += current.weight(); + } + } + + if (maxScore < currentScore) { + maxScore = currentScore; + } + } + + return this->createTypeface(maxScore.index); +} diff --git a/gfx/skia/skia/src/core/SkFontMgrPriv.h b/gfx/skia/skia/src/core/SkFontMgrPriv.h new file mode 100644 index 0000000000..40cf264037 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontMgrPriv.h @@ -0,0 +1,14 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkFontMgrPriv_DEFINED +#define SkFontMgrPriv_DEFINED + +#include "include/core/SkFontMgr.h" + +extern sk_sp (*gSkFontMgr_DefaultFactory)(); + +#endif // SkFontMgrPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkFontPriv.h b/gfx/skia/skia/src/core/SkFontPriv.h new file mode 100644 index 0000000000..3907085baa --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontPriv.h @@ -0,0 +1,120 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontPriv_DEFINED +#define SkFontPriv_DEFINED + +#include "include/core/SkFont.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkTemplates.h" + +class SkReadBuffer; +class SkWriteBuffer; + +class SkFontPriv { +public: + /* This is the size we use when we ask for a glyph's path. We then + * post-transform it as we draw to match the request. + * This is done to try to re-use cache entries for the path. + * + * This value is somewhat arbitrary. In theory, it could be 1, since + * we store paths as floats. However, we get the path from the font + * scaler, and it may represent its paths as fixed-point (or 26.6), + * so we shouldn't ask for something too big (might overflow 16.16) + * or too small (underflow 26.6). + * + * This value could track kMaxSizeForGlyphCache, assuming the above + * constraints, but since we ask for unhinted paths, the two values + * need not match per-se. + */ + inline static constexpr int kCanonicalTextSizeForPaths = 64; + + /** + * Return a matrix that applies the paint's text values: size, scale, skew + */ + static SkMatrix MakeTextMatrix(SkScalar size, SkScalar scaleX, SkScalar skewX) { + SkMatrix m = SkMatrix::Scale(size * scaleX, size); + if (skewX) { + m.postSkew(skewX, 0); + } + return m; + } + + static SkMatrix MakeTextMatrix(const SkFont& font) { + return MakeTextMatrix(font.getSize(), font.getScaleX(), font.getSkewX()); + } + + static void ScaleFontMetrics(SkFontMetrics*, SkScalar); + + /** + Returns the union of bounds of all glyphs. + Returned dimensions are computed by font manager from font data, + ignoring SkPaint::Hinting. Includes font metrics, but not fake bold or SkPathEffect. + + If text size is large, text scale is one, and text skew is zero, + returns the bounds as: + { SkFontMetrics::fXMin, SkFontMetrics::fTop, SkFontMetrics::fXMax, SkFontMetrics::fBottom }. + + @return union of bounds of all glyphs + */ + static SkRect GetFontBounds(const SkFont&); + + /** Return the approximate largest dimension of typical text when transformed by the matrix. + * + * @param matrix used to transform size + * @param textLocation location of the text prior to matrix transformation. Used if the + * matrix has perspective. + * @return typical largest dimension + */ + static SkScalar ApproximateTransformedTextSize(const SkFont& font, const SkMatrix& matrix, + const SkPoint& textLocation); + + static bool IsFinite(const SkFont& font) { + return SkScalarIsFinite(font.getSize()) && + SkScalarIsFinite(font.getScaleX()) && + SkScalarIsFinite(font.getSkewX()); + } + + // Returns the number of elements (characters or glyphs) in the array. + static int CountTextElements(const void* text, size_t byteLength, SkTextEncoding); + + static void GlyphsToUnichars(const SkFont&, const uint16_t glyphs[], int count, SkUnichar[]); + + static void Flatten(const SkFont&, SkWriteBuffer& buffer); + static bool Unflatten(SkFont*, SkReadBuffer& buffer); + + static inline uint8_t Flags(const SkFont& font) { return font.fFlags; } +}; + +class SkAutoToGlyphs { +public: + SkAutoToGlyphs(const SkFont& font, const void* text, size_t length, SkTextEncoding encoding) { + if (encoding == SkTextEncoding::kGlyphID || length == 0) { + fGlyphs = reinterpret_cast(text); + fCount = SkToInt(length >> 1); + } else { + fCount = font.countText(text, length, encoding); + if (fCount < 0) { + fCount = 0; + } + fStorage.reset(fCount); + font.textToGlyphs(text, length, encoding, fStorage.get(), fCount); + fGlyphs = fStorage.get(); + } + } + + int count() const { return fCount; } + const uint16_t* glyphs() const { return fGlyphs; } + +private: + skia_private::AutoSTArray<32, uint16_t> fStorage; + const uint16_t* fGlyphs; + int fCount; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkFontStream.cpp b/gfx/skia/skia/src/core/SkFontStream.cpp new file mode 100644 index 0000000000..a3194e295f --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontStream.cpp @@ -0,0 +1,211 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "src/base/SkAutoMalloc.h" +#include "src/base/SkEndian.h" +#include "src/core/SkFontStream.h" + +struct SkSFNTHeader { + uint32_t fVersion; + uint16_t fNumTables; + uint16_t fSearchRange; + uint16_t fEntrySelector; + uint16_t fRangeShift; +}; + +struct SkTTCFHeader { + uint32_t fTag; + uint32_t fVersion; + uint32_t fNumOffsets; + uint32_t fOffset0; // the first of N (fNumOffsets) +}; + +union SkSharedTTHeader { + SkSFNTHeader fSingle; + SkTTCFHeader fCollection; +}; + +struct SkSFNTDirEntry { + uint32_t fTag; + uint32_t fChecksum; + uint32_t fOffset; + uint32_t fLength; +}; + +static bool read(SkStream* stream, void* buffer, size_t amount) { + return stream->read(buffer, amount) == amount; +} + +static bool skip(SkStream* stream, size_t amount) { + return stream->skip(amount) == amount; +} + +/** Return the number of tables, or if this is a TTC (collection), return the + number of tables in the first element of the collection. In either case, + if offsetToDir is not-null, set it to the offset to the beginning of the + table headers (SkSFNTDirEntry), relative to the start of the stream. + + On an error, return 0 for number of tables, and ignore offsetToDir + */ +static int count_tables(SkStream* stream, int ttcIndex, size_t* offsetToDir) { + SkASSERT(ttcIndex >= 0); + + SkAutoSMalloc<1024> storage(sizeof(SkSharedTTHeader)); + SkSharedTTHeader* header = (SkSharedTTHeader*)storage.get(); + + if (!read(stream, header, sizeof(SkSharedTTHeader))) { + return 0; + } + + // by default, SkSFNTHeader is at the start of the stream + size_t offset = 0; + + // if we're really a collection, the first 4-bytes will be 'ttcf' + uint32_t tag = SkEndian_SwapBE32(header->fCollection.fTag); + if (SkSetFourByteTag('t', 't', 'c', 'f') == tag) { + unsigned count = SkEndian_SwapBE32(header->fCollection.fNumOffsets); + if ((unsigned)ttcIndex >= count) { + return 0; + } + + if (ttcIndex > 0) { // need to read more of the shared header + stream->rewind(); + size_t amount = sizeof(SkSharedTTHeader) + ttcIndex * sizeof(uint32_t); + header = (SkSharedTTHeader*)storage.reset(amount); + if (!read(stream, header, amount)) { + return 0; + } + } + // this is the offset to the local SkSFNTHeader + offset = SkEndian_SwapBE32((&header->fCollection.fOffset0)[ttcIndex]); + stream->rewind(); + if (!skip(stream, offset)) { + return 0; + } + if (!read(stream, header, sizeof(SkSFNTHeader))) { + return 0; + } + } + + if (offsetToDir) { + // add the size of the header, so we will point to the DirEntries + *offsetToDir = offset + sizeof(SkSFNTHeader); + } + return SkEndian_SwapBE16(header->fSingle.fNumTables); +} + +/////////////////////////////////////////////////////////////////////////////// + +struct SfntHeader { + SfntHeader() : fCount(0), fDir(nullptr) {} + ~SfntHeader() { sk_free(fDir); } + + /** If it returns true, then fCount and fDir are properly initialized. + Note: fDir will point to the raw array of SkSFNTDirEntry values, + meaning they will still be in the file's native endianness (BE). + + fDir will be automatically freed when this object is destroyed + */ + bool init(SkStream* stream, int ttcIndex) { + stream->rewind(); + + size_t offsetToDir; + fCount = count_tables(stream, ttcIndex, &offsetToDir); + if (0 == fCount) { + return false; + } + + stream->rewind(); + if (!skip(stream, offsetToDir)) { + return false; + } + + size_t size = fCount * sizeof(SkSFNTDirEntry); + fDir = reinterpret_cast(sk_malloc_throw(size)); + return read(stream, fDir, size); + } + + int fCount; + SkSFNTDirEntry* fDir; +}; + +/////////////////////////////////////////////////////////////////////////////// + +int SkFontStream::CountTTCEntries(SkStream* stream) { + stream->rewind(); + + SkSharedTTHeader shared; + if (!read(stream, &shared, sizeof(shared))) { + return 0; + } + + // if we're really a collection, the first 4-bytes will be 'ttcf' + uint32_t tag = SkEndian_SwapBE32(shared.fCollection.fTag); + if (SkSetFourByteTag('t', 't', 'c', 'f') == tag) { + return SkEndian_SwapBE32(shared.fCollection.fNumOffsets); + } else { + return 1; // normal 'sfnt' has 1 dir entry + } +} + +int SkFontStream::GetTableTags(SkStream* stream, int ttcIndex, + SkFontTableTag tags[]) { + SfntHeader header; + if (!header.init(stream, ttcIndex)) { + return 0; + } + + if (tags) { + for (int i = 0; i < header.fCount; i++) { + tags[i] = SkEndian_SwapBE32(header.fDir[i].fTag); + } + } + return header.fCount; +} + +size_t SkFontStream::GetTableData(SkStream* stream, int ttcIndex, + SkFontTableTag tag, + size_t offset, size_t length, void* data) { + SfntHeader header; + if (!header.init(stream, ttcIndex)) { + return 0; + } + + for (int i = 0; i < header.fCount; i++) { + if (SkEndian_SwapBE32(header.fDir[i].fTag) == tag) { + size_t realOffset = SkEndian_SwapBE32(header.fDir[i].fOffset); + size_t realLength = SkEndian_SwapBE32(header.fDir[i].fLength); + if (offset >= realLength) { + // invalid + return 0; + } + // if the caller is trusting the length from the file, then a + // hostile file might choose a value which would overflow offset + + // length. + if (offset + length < offset) { + return 0; + } + if (length > realLength - offset) { + length = realLength - offset; + } + if (data) { + // skip the stream to the part of the table we want to copy from + stream->rewind(); + size_t bytesToSkip = realOffset + offset; + if (!skip(stream, bytesToSkip)) { + return 0; + } + if (!read(stream, data, length)) { + return 0; + } + } + return length; + } + } + return 0; +} diff --git a/gfx/skia/skia/src/core/SkFontStream.h b/gfx/skia/skia/src/core/SkFontStream.h new file mode 100644 index 0000000000..57f0e85137 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFontStream.h @@ -0,0 +1,49 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontStream_DEFINED +#define SkFontStream_DEFINED + +class SkStream; + +#include "include/core/SkTypeface.h" + +class SkFontStream { +public: + /** + * Return the number of shared directories inside a TTC sfnt, or return 1 + * if the stream is a normal sfnt (ttf). If there is an error or + * no directory is found, return 0. + * + * Note: the stream is rewound initially, but is returned at an arbitrary + * read offset. + */ + static int CountTTCEntries(SkStream*); + + /** + * @param ttcIndex 0 for normal sfnts, or the index within a TTC sfnt. + * + * Note: the stream is rewound initially, but is returned at an arbitrary + * read offset. + */ + static int GetTableTags(SkStream*, int ttcIndex, SkFontTableTag tags[]); + + /** + * @param ttcIndex 0 for normal sfnts, or the index within a TTC sfnt. + * + * Note: the stream is rewound initially, but is returned at an arbitrary + * read offset. + */ + static size_t GetTableData(SkStream*, int ttcIndex, SkFontTableTag tag, + size_t offset, size_t length, void* data); + + static size_t GetTableSize(SkStream* stream, int ttcIndex, SkFontTableTag tag) { + return GetTableData(stream, ttcIndex, tag, 0, ~0U, nullptr); + } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkFont_serial.cpp b/gfx/skia/skia/src/core/SkFont_serial.cpp new file mode 100644 index 0000000000..0ed5c16756 --- /dev/null +++ b/gfx/skia/skia/src/core/SkFont_serial.cpp @@ -0,0 +1,117 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypeface.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +// packed int at the beginning of the serialized font: +// +// control_bits:8 size_as_byte:8 flags:12 edging:2 hinting:2 + +enum { + kSize_Is_Byte_Bit = 1 << 31, + kHas_ScaleX_Bit = 1 << 30, + kHas_SkewX_Bit = 1 << 29, + kHas_Typeface_Bit = 1 << 28, + + kShift_for_Size = 16, + kMask_For_Size = 0xFF, + + kShift_For_Flags = 4, + kMask_For_Flags = 0xFFF, + + kShift_For_Edging = 2, + kMask_For_Edging = 0x3, + + kShift_For_Hinting = 0, + kMask_For_Hinting = 0x3 +}; + +static bool scalar_is_byte(SkScalar x) { + int ix = (int)x; + return ix == x && ix >= 0 && ix <= kMask_For_Size; +} + +void SkFontPriv::Flatten(const SkFont& font, SkWriteBuffer& buffer) { + SkASSERT(font.fFlags <= SkFont::kAllFlags); + SkASSERT((font.fFlags & ~kMask_For_Flags) == 0); + SkASSERT((font.fEdging & ~kMask_For_Edging) == 0); + SkASSERT((font.fHinting & ~kMask_For_Hinting) == 0); + + uint32_t packed = 0; + packed |= font.fFlags << kShift_For_Flags; + packed |= font.fEdging << kShift_For_Edging; + packed |= font.fHinting << kShift_For_Hinting; + + if (scalar_is_byte(font.fSize)) { + packed |= kSize_Is_Byte_Bit; + packed |= (int)font.fSize << kShift_for_Size; + } + if (font.fScaleX != 1) { + packed |= kHas_ScaleX_Bit; + } + if (font.fSkewX != 0) { + packed |= kHas_SkewX_Bit; + } + if (font.fTypeface) { + packed |= kHas_Typeface_Bit; + } + + buffer.write32(packed); + if (!(packed & kSize_Is_Byte_Bit)) { + buffer.writeScalar(font.fSize); + } + if (packed & kHas_ScaleX_Bit) { + buffer.writeScalar(font.fScaleX); + } + if (packed & kHas_SkewX_Bit) { + buffer.writeScalar(font.fSkewX); + } + if (packed & kHas_Typeface_Bit) { + buffer.writeTypeface(font.fTypeface.get()); + } +} + +bool SkFontPriv::Unflatten(SkFont* font, SkReadBuffer& buffer) { + const uint32_t packed = buffer.read32(); + + if (packed & kSize_Is_Byte_Bit) { + font->fSize = (packed >> kShift_for_Size) & kMask_For_Size; + } else { + font->fSize = buffer.readScalar(); + } + if (packed & kHas_ScaleX_Bit) { + font->fScaleX = buffer.readScalar(); + } + if (packed & kHas_SkewX_Bit) { + font->fSkewX = buffer.readScalar(); + } + if (packed & kHas_Typeface_Bit) { + font->fTypeface = buffer.readTypeface(); + } + + SkASSERT(SkFont::kAllFlags <= kMask_For_Flags); + // we & with kAllFlags, to clear out any unknown flag bits + font->fFlags = SkToU8((packed >> kShift_For_Flags) & SkFont::kAllFlags); + + unsigned edging = (packed >> kShift_For_Edging) & kMask_For_Edging; + if (edging > (unsigned)SkFont::Edging::kSubpixelAntiAlias) { + edging = 0; + } + font->fEdging = SkToU8(edging); + + unsigned hinting = (packed >> kShift_For_Hinting) & kMask_For_Hinting; + if (hinting > (unsigned)SkFontHinting::kFull) { + hinting = 0; + } + font->fHinting = SkToU8(hinting); + + return buffer.isValid(); +} diff --git a/gfx/skia/skia/src/core/SkFuzzLogging.h b/gfx/skia/skia/src/core/SkFuzzLogging.h new file mode 100644 index 0000000000..9f942f35de --- /dev/null +++ b/gfx/skia/skia/src/core/SkFuzzLogging.h @@ -0,0 +1,23 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFuzzLogging_DEFINED +#define SkFuzzLogging_DEFINED + +// Utilities for Skia's fuzzer + +// When SK_FUZZ_LOGGING is defined SkDebugfs relevant to image filter fuzzing +// will be enabled. This allows the filter fuzzing code to include fuzzer +// failures based on the output logs. +// Define this flag in your SkUserConfig.h or in your Make/Build system. +#ifdef SK_FUZZ_LOGGING + #define SkFUZZF(args) SkDebugf("SkFUZZ: "); SkDebugf args +#else + #define SkFUZZF(args) +#endif + +#endif diff --git a/gfx/skia/skia/src/core/SkGaussFilter.cpp b/gfx/skia/skia/src/core/SkGaussFilter.cpp new file mode 100644 index 0000000000..5cbc93705c --- /dev/null +++ b/gfx/skia/skia/src/core/SkGaussFilter.cpp @@ -0,0 +1,109 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#include "include/core/SkTypes.h" +#include "include/private/base/SkFloatingPoint.h" +#include "src/core/SkGaussFilter.h" +#include + +// The value when we can stop expanding the filter. The spec implies that 3% is acceptable, but +// we just use 1%. +static constexpr double kGoodEnough = 1.0 / 100.0; + +// Normalize the values of gauss to 1.0, and make sure they add to one. +// NB if n == 1, then this will force gauss[0] == 1. +static void normalize(int n, double* gauss) { + // Carefully add from smallest to largest to calculate the normalizing sum. + double sum = 0; + for (int i = n-1; i >= 1; i--) { + sum += 2 * gauss[i]; + } + sum += gauss[0]; + + // Normalize gauss. + for (int i = 0; i < n; i++) { + gauss[i] /= sum; + } + + // The factors should sum to 1. Take any remaining slop, and add it to gauss[0]. Add the + // values in such a way to maintain the most accuracy. + sum = 0; + for (int i = n - 1; i >= 1; i--) { + sum += 2 * gauss[i]; + } + + gauss[0] = 1 - sum; +} + +static int calculate_bessel_factors(double sigma, double *gauss) { + auto var = sigma * sigma; + + // The two functions below come from the equations in "Handbook of Mathematical Functions" + // by Abramowitz and Stegun. Specifically, equation 9.6.10 on page 375. Bessel0 is given + // explicitly as 9.6.12 + // BesselI_0 for 0 <= sigma < 2. + // NB the k = 0 factor is just sum = 1.0. + auto besselI_0 = [](double t) -> double { + auto tSquaredOver4 = t * t / 4.0; + auto sum = 1.0; + auto factor = 1.0; + auto k = 1; + // Use a variable number of loops. When sigma is small, this only requires 3-4 loops, but + // when sigma is near 2, it could require 10 loops. The same holds for BesselI_1. + while(factor > 1.0/1000000.0) { + factor *= tSquaredOver4 / (k * k); + sum += factor; + k += 1; + } + return sum; + }; + // BesselI_1 for 0 <= sigma < 2. + auto besselI_1 = [](double t) -> double { + auto tSquaredOver4 = t * t / 4.0; + auto sum = t / 2.0; + auto factor = sum; + auto k = 1; + while (factor > 1.0/1000000.0) { + factor *= tSquaredOver4 / (k * (k + 1)); + sum += factor; + k += 1; + } + return sum; + }; + + // The following formula for calculating the Gaussian kernel is from + // "Scale-Space for Discrete Signals" by Tony Lindeberg. + // gauss(n; var) = besselI_n(var) / (e^var) + auto d = std::exp(var); + double b[SkGaussFilter::kGaussArrayMax] = {besselI_0(var), besselI_1(var)}; + gauss[0] = b[0]/d; + gauss[1] = b[1]/d; + + // The code below is tricky, and written to mirror the recursive equations from the book. + // The maximum spread for sigma == 2 is guass[4], but in order to know to stop guass[5] + // is calculated. At this point n == 5 meaning that gauss[0..4] are the factors, but a 6th + // element was used to calculate them. + int n = 1; + // The recurrence relation below is from "Numerical Recipes" 3rd Edition. + // Equation 6.5.16 p.282 + while (gauss[n] > kGoodEnough) { + b[n+1] = -(2*n/var) * b[n] + b[n-1]; + gauss[n+1] = b[n+1] / d; + n += 1; + } + + normalize(n, gauss); + + return n; +} + +SkGaussFilter::SkGaussFilter(double sigma) { + SkASSERT(0 <= sigma && sigma < 2); + + fN = calculate_bessel_factors(sigma, fBasis); +} diff --git a/gfx/skia/skia/src/core/SkGaussFilter.h b/gfx/skia/skia/src/core/SkGaussFilter.h new file mode 100644 index 0000000000..11ff4a85e8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGaussFilter.h @@ -0,0 +1,34 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGaussFilter_DEFINED +#define SkGaussFilter_DEFINED + +#include + +// Define gaussian filters for values of sigma < 2. Produce values good to 1 part in 1,000,000. +// Produces values as defined in "Scale-Space for Discrete Signals" by Tony Lindeberg. +class SkGaussFilter { +public: + inline static constexpr int kGaussArrayMax = 6; + + explicit SkGaussFilter(double sigma); + + size_t size() const { return fN; } + int radius() const { return fN - 1; } + int width() const { return 2 * this->radius() + 1; } + + // Allow a filter to be used in a C++ ranged-for loop. + const double* begin() const { return &fBasis[0]; } + const double* end() const { return &fBasis[fN]; } + +private: + double fBasis[kGaussArrayMax]; + int fN; +}; + +#endif // SkGaussFilter_DEFINED diff --git a/gfx/skia/skia/src/core/SkGeometry.cpp b/gfx/skia/skia/src/core/SkGeometry.cpp new file mode 100644 index 0000000000..f13bfadd68 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGeometry.cpp @@ -0,0 +1,1780 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkGeometry.h" + +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkRect.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkBezierCurves.h" +#include "src/base/SkCubics.h" +#include "src/base/SkVx.h" +#include "src/core/SkPointPriv.h" + +#include +#include +#include +#include +#include + +namespace { + +using float2 = skvx::float2; +using float4 = skvx::float4; + +SkVector to_vector(const float2& x) { + SkVector vector; + x.store(&vector); + return vector; +} + +//////////////////////////////////////////////////////////////////////// + +int is_not_monotonic(SkScalar a, SkScalar b, SkScalar c) { + SkScalar ab = a - b; + SkScalar bc = b - c; + if (ab < 0) { + bc = -bc; + } + return ab == 0 || bc < 0; +} + +//////////////////////////////////////////////////////////////////////// + +int valid_unit_divide(SkScalar numer, SkScalar denom, SkScalar* ratio) { + SkASSERT(ratio); + + if (numer < 0) { + numer = -numer; + denom = -denom; + } + + if (denom == 0 || numer == 0 || numer >= denom) { + return 0; + } + + SkScalar r = numer / denom; + if (SkScalarIsNaN(r)) { + return 0; + } + SkASSERTF(r >= 0 && r < SK_Scalar1, "numer %f, denom %f, r %f", numer, denom, r); + if (r == 0) { // catch underflow if numer <<<< denom + return 0; + } + *ratio = r; + return 1; +} + +// Just returns its argument, but makes it easy to set a break-point to know when +// SkFindUnitQuadRoots is going to return 0 (an error). +int return_check_zero(int value) { + if (value == 0) { + return 0; + } + return value; +} + +} // namespace + +/** From Numerical Recipes in C. + + Q = -1/2 (B + sign(B) sqrt[B*B - 4*A*C]) + x1 = Q / A + x2 = C / Q +*/ +int SkFindUnitQuadRoots(SkScalar A, SkScalar B, SkScalar C, SkScalar roots[2]) { + SkASSERT(roots); + + if (A == 0) { + return return_check_zero(valid_unit_divide(-C, B, roots)); + } + + SkScalar* r = roots; + + // use doubles so we don't overflow temporarily trying to compute R + double dr = (double)B * B - 4 * (double)A * C; + if (dr < 0) { + return return_check_zero(0); + } + dr = sqrt(dr); + SkScalar R = SkDoubleToScalar(dr); + if (!SkScalarIsFinite(R)) { + return return_check_zero(0); + } + + SkScalar Q = (B < 0) ? -(B-R)/2 : -(B+R)/2; + r += valid_unit_divide(Q, A, r); + r += valid_unit_divide(C, Q, r); + if (r - roots == 2) { + if (roots[0] > roots[1]) { + using std::swap; + swap(roots[0], roots[1]); + } else if (roots[0] == roots[1]) { // nearly-equal? + r -= 1; // skip the double root + } + } + return return_check_zero((int)(r - roots)); +} + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// + +void SkEvalQuadAt(const SkPoint src[3], SkScalar t, SkPoint* pt, SkVector* tangent) { + SkASSERT(src); + SkASSERT(t >= 0 && t <= SK_Scalar1); + + if (pt) { + *pt = SkEvalQuadAt(src, t); + } + if (tangent) { + *tangent = SkEvalQuadTangentAt(src, t); + } +} + +SkPoint SkEvalQuadAt(const SkPoint src[3], SkScalar t) { + return to_point(SkQuadCoeff(src).eval(t)); +} + +SkVector SkEvalQuadTangentAt(const SkPoint src[3], SkScalar t) { + // The derivative equation is 2(b - a +(a - 2b +c)t). This returns a + // zero tangent vector when t is 0 or 1, and the control point is equal + // to the end point. In this case, use the quad end points to compute the tangent. + if ((t == 0 && src[0] == src[1]) || (t == 1 && src[1] == src[2])) { + return src[2] - src[0]; + } + SkASSERT(src); + SkASSERT(t >= 0 && t <= SK_Scalar1); + + float2 P0 = from_point(src[0]); + float2 P1 = from_point(src[1]); + float2 P2 = from_point(src[2]); + + float2 B = P1 - P0; + float2 A = P2 - P1 - B; + float2 T = A * t + B; + + return to_vector(T + T); +} + +static inline float2 interp(const float2& v0, + const float2& v1, + const float2& t) { + return v0 + (v1 - v0) * t; +} + +void SkChopQuadAt(const SkPoint src[3], SkPoint dst[5], SkScalar t) { + SkASSERT(t > 0 && t < SK_Scalar1); + + float2 p0 = from_point(src[0]); + float2 p1 = from_point(src[1]); + float2 p2 = from_point(src[2]); + float2 tt(t); + + float2 p01 = interp(p0, p1, tt); + float2 p12 = interp(p1, p2, tt); + + dst[0] = to_point(p0); + dst[1] = to_point(p01); + dst[2] = to_point(interp(p01, p12, tt)); + dst[3] = to_point(p12); + dst[4] = to_point(p2); +} + +void SkChopQuadAtHalf(const SkPoint src[3], SkPoint dst[5]) { + SkChopQuadAt(src, dst, 0.5f); +} + +float SkMeasureAngleBetweenVectors(SkVector a, SkVector b) { + float cosTheta = sk_ieee_float_divide(a.dot(b), sqrtf(a.dot(a) * b.dot(b))); + // Pin cosTheta such that if it is NaN (e.g., if a or b was 0), then we return acos(1) = 0. + cosTheta = std::max(std::min(1.f, cosTheta), -1.f); + return acosf(cosTheta); +} + +SkVector SkFindBisector(SkVector a, SkVector b) { + std::array v; + if (a.dot(b) >= 0) { + // a,b are within +/-90 degrees apart. + v = {a, b}; + } else if (a.cross(b) >= 0) { + // a,b are >90 degrees apart. Find the bisector of their interior normals instead. (Above 90 + // degrees, the original vectors start cancelling each other out which eventually becomes + // unstable.) + v[0].set(-a.fY, +a.fX); + v[1].set(+b.fY, -b.fX); + } else { + // a,b are <-90 degrees apart. Find the bisector of their interior normals instead. (Below + // -90 degrees, the original vectors start cancelling each other out which eventually + // becomes unstable.) + v[0].set(+a.fY, -a.fX); + v[1].set(-b.fY, +b.fX); + } + // Return "normalize(v[0]) + normalize(v[1])". + skvx::float2 x0_x1{v[0].fX, v[1].fX}; + skvx::float2 y0_y1{v[0].fY, v[1].fY}; + auto invLengths = 1.0f / sqrt(x0_x1 * x0_x1 + y0_y1 * y0_y1); + x0_x1 *= invLengths; + y0_y1 *= invLengths; + return SkPoint{x0_x1[0] + x0_x1[1], y0_y1[0] + y0_y1[1]}; +} + +float SkFindQuadMidTangent(const SkPoint src[3]) { + // Tangents point in the direction of increasing T, so tan0 and -tan1 both point toward the + // midtangent. The bisector of tan0 and -tan1 is orthogonal to the midtangent: + // + // n dot midtangent = 0 + // + SkVector tan0 = src[1] - src[0]; + SkVector tan1 = src[2] - src[1]; + SkVector bisector = SkFindBisector(tan0, -tan1); + + // The midtangent can be found where (F' dot bisector) = 0: + // + // 0 = (F'(T) dot bisector) = |2*T 1| * |p0 - 2*p1 + p2| * |bisector.x| + // |-2*p0 + 2*p1 | |bisector.y| + // + // = |2*T 1| * |tan1 - tan0| * |nx| + // |2*tan0 | |ny| + // + // = 2*T * ((tan1 - tan0) dot bisector) + (2*tan0 dot bisector) + // + // T = (tan0 dot bisector) / ((tan0 - tan1) dot bisector) + float T = sk_ieee_float_divide(tan0.dot(bisector), (tan0 - tan1).dot(bisector)); + if (!(T > 0 && T < 1)) { // Use "!(positive_logic)" so T=nan will take this branch. + T = .5; // The quadratic was a line or near-line. Just chop at .5. + } + + return T; +} + +/** Quad'(t) = At + B, where + A = 2(a - 2b + c) + B = 2(b - a) + Solve for t, only if it fits between 0 < t < 1 +*/ +int SkFindQuadExtrema(SkScalar a, SkScalar b, SkScalar c, SkScalar tValue[1]) { + /* At + B == 0 + t = -B / A + */ + return valid_unit_divide(a - b, a - b - b + c, tValue); +} + +static inline void flatten_double_quad_extrema(SkScalar coords[14]) { + coords[2] = coords[6] = coords[4]; +} + +/* Returns 0 for 1 quad, and 1 for two quads, either way the answer is + stored in dst[]. Guarantees that the 1/2 quads will be monotonic. + */ +int SkChopQuadAtYExtrema(const SkPoint src[3], SkPoint dst[5]) { + SkASSERT(src); + SkASSERT(dst); + + SkScalar a = src[0].fY; + SkScalar b = src[1].fY; + SkScalar c = src[2].fY; + + if (is_not_monotonic(a, b, c)) { + SkScalar tValue; + if (valid_unit_divide(a - b, a - b - b + c, &tValue)) { + SkChopQuadAt(src, dst, tValue); + flatten_double_quad_extrema(&dst[0].fY); + return 1; + } + // if we get here, we need to force dst to be monotonic, even though + // we couldn't compute a unit_divide value (probably underflow). + b = SkScalarAbs(a - b) < SkScalarAbs(b - c) ? a : c; + } + dst[0].set(src[0].fX, a); + dst[1].set(src[1].fX, b); + dst[2].set(src[2].fX, c); + return 0; +} + +/* Returns 0 for 1 quad, and 1 for two quads, either way the answer is + stored in dst[]. Guarantees that the 1/2 quads will be monotonic. + */ +int SkChopQuadAtXExtrema(const SkPoint src[3], SkPoint dst[5]) { + SkASSERT(src); + SkASSERT(dst); + + SkScalar a = src[0].fX; + SkScalar b = src[1].fX; + SkScalar c = src[2].fX; + + if (is_not_monotonic(a, b, c)) { + SkScalar tValue; + if (valid_unit_divide(a - b, a - b - b + c, &tValue)) { + SkChopQuadAt(src, dst, tValue); + flatten_double_quad_extrema(&dst[0].fX); + return 1; + } + // if we get here, we need to force dst to be monotonic, even though + // we couldn't compute a unit_divide value (probably underflow). + b = SkScalarAbs(a - b) < SkScalarAbs(b - c) ? a : c; + } + dst[0].set(a, src[0].fY); + dst[1].set(b, src[1].fY); + dst[2].set(c, src[2].fY); + return 0; +} + +// F(t) = a (1 - t) ^ 2 + 2 b t (1 - t) + c t ^ 2 +// F'(t) = 2 (b - a) + 2 (a - 2b + c) t +// F''(t) = 2 (a - 2b + c) +// +// A = 2 (b - a) +// B = 2 (a - 2b + c) +// +// Maximum curvature for a quadratic means solving +// Fx' Fx'' + Fy' Fy'' = 0 +// +// t = - (Ax Bx + Ay By) / (Bx ^ 2 + By ^ 2) +// +SkScalar SkFindQuadMaxCurvature(const SkPoint src[3]) { + SkScalar Ax = src[1].fX - src[0].fX; + SkScalar Ay = src[1].fY - src[0].fY; + SkScalar Bx = src[0].fX - src[1].fX - src[1].fX + src[2].fX; + SkScalar By = src[0].fY - src[1].fY - src[1].fY + src[2].fY; + + SkScalar numer = -(Ax * Bx + Ay * By); + SkScalar denom = Bx * Bx + By * By; + if (denom < 0) { + numer = -numer; + denom = -denom; + } + if (numer <= 0) { + return 0; + } + if (numer >= denom) { // Also catches denom=0. + return 1; + } + SkScalar t = numer / denom; + SkASSERT((0 <= t && t < 1) || SkScalarIsNaN(t)); + return t; +} + +int SkChopQuadAtMaxCurvature(const SkPoint src[3], SkPoint dst[5]) { + SkScalar t = SkFindQuadMaxCurvature(src); + if (t > 0 && t < 1) { + SkChopQuadAt(src, dst, t); + return 2; + } else { + memcpy(dst, src, 3 * sizeof(SkPoint)); + return 1; + } +} + +void SkConvertQuadToCubic(const SkPoint src[3], SkPoint dst[4]) { + float2 scale(SkDoubleToScalar(2.0 / 3.0)); + float2 s0 = from_point(src[0]); + float2 s1 = from_point(src[1]); + float2 s2 = from_point(src[2]); + + dst[0] = to_point(s0); + dst[1] = to_point(s0 + (s1 - s0) * scale); + dst[2] = to_point(s2 + (s1 - s2) * scale); + dst[3] = to_point(s2); +} + +////////////////////////////////////////////////////////////////////////////// +///// CUBICS // CUBICS // CUBICS // CUBICS // CUBICS // CUBICS // CUBICS ///// +////////////////////////////////////////////////////////////////////////////// + +static SkVector eval_cubic_derivative(const SkPoint src[4], SkScalar t) { + SkQuadCoeff coeff; + float2 P0 = from_point(src[0]); + float2 P1 = from_point(src[1]); + float2 P2 = from_point(src[2]); + float2 P3 = from_point(src[3]); + + coeff.fA = P3 + 3 * (P1 - P2) - P0; + coeff.fB = times_2(P2 - times_2(P1) + P0); + coeff.fC = P1 - P0; + return to_vector(coeff.eval(t)); +} + +static SkVector eval_cubic_2ndDerivative(const SkPoint src[4], SkScalar t) { + float2 P0 = from_point(src[0]); + float2 P1 = from_point(src[1]); + float2 P2 = from_point(src[2]); + float2 P3 = from_point(src[3]); + float2 A = P3 + 3 * (P1 - P2) - P0; + float2 B = P2 - times_2(P1) + P0; + + return to_vector(A * t + B); +} + +void SkEvalCubicAt(const SkPoint src[4], SkScalar t, SkPoint* loc, + SkVector* tangent, SkVector* curvature) { + SkASSERT(src); + SkASSERT(t >= 0 && t <= SK_Scalar1); + + if (loc) { + *loc = to_point(SkCubicCoeff(src).eval(t)); + } + if (tangent) { + // The derivative equation returns a zero tangent vector when t is 0 or 1, and the + // adjacent control point is equal to the end point. In this case, use the + // next control point or the end points to compute the tangent. + if ((t == 0 && src[0] == src[1]) || (t == 1 && src[2] == src[3])) { + if (t == 0) { + *tangent = src[2] - src[0]; + } else { + *tangent = src[3] - src[1]; + } + if (!tangent->fX && !tangent->fY) { + *tangent = src[3] - src[0]; + } + } else { + *tangent = eval_cubic_derivative(src, t); + } + } + if (curvature) { + *curvature = eval_cubic_2ndDerivative(src, t); + } +} + +/** Cubic'(t) = At^2 + Bt + C, where + A = 3(-a + 3(b - c) + d) + B = 6(a - 2b + c) + C = 3(b - a) + Solve for t, keeping only those that fit betwee 0 < t < 1 +*/ +int SkFindCubicExtrema(SkScalar a, SkScalar b, SkScalar c, SkScalar d, + SkScalar tValues[2]) { + // we divide A,B,C by 3 to simplify + SkScalar A = d - a + 3*(b - c); + SkScalar B = 2*(a - b - b + c); + SkScalar C = b - a; + + return SkFindUnitQuadRoots(A, B, C, tValues); +} + +// This does not return b when t==1, but it otherwise seems to get better precision than +// "a*(1 - t) + b*t" for things like chopping cubics on exact cusp points. +// The responsibility falls on the caller to check that t != 1 before calling. +template +inline static skvx::Vec unchecked_mix(const skvx::Vec& a, const skvx::Vec& b, + const skvx::Vec& t) { + return (b - a)*t + a; +} + +void SkChopCubicAt(const SkPoint src[4], SkPoint dst[7], SkScalar t) { + SkASSERT(0 <= t && t <= 1); + + if (t == 1) { + memcpy(dst, src, sizeof(SkPoint) * 4); + dst[4] = dst[5] = dst[6] = src[3]; + return; + } + + float2 p0 = skvx::bit_pun(src[0]); + float2 p1 = skvx::bit_pun(src[1]); + float2 p2 = skvx::bit_pun(src[2]); + float2 p3 = skvx::bit_pun(src[3]); + float2 T = t; + + float2 ab = unchecked_mix(p0, p1, T); + float2 bc = unchecked_mix(p1, p2, T); + float2 cd = unchecked_mix(p2, p3, T); + float2 abc = unchecked_mix(ab, bc, T); + float2 bcd = unchecked_mix(bc, cd, T); + float2 abcd = unchecked_mix(abc, bcd, T); + + dst[0] = skvx::bit_pun(p0); + dst[1] = skvx::bit_pun(ab); + dst[2] = skvx::bit_pun(abc); + dst[3] = skvx::bit_pun(abcd); + dst[4] = skvx::bit_pun(bcd); + dst[5] = skvx::bit_pun(cd); + dst[6] = skvx::bit_pun(p3); +} + +void SkChopCubicAt(const SkPoint src[4], SkPoint dst[10], float t0, float t1) { + SkASSERT(0 <= t0 && t0 <= t1 && t1 <= 1); + + if (t1 == 1) { + SkChopCubicAt(src, dst, t0); + dst[7] = dst[8] = dst[9] = src[3]; + return; + } + + // Perform both chops in parallel using 4-lane SIMD. + float4 p00, p11, p22, p33, T; + p00.lo = p00.hi = skvx::bit_pun(src[0]); + p11.lo = p11.hi = skvx::bit_pun(src[1]); + p22.lo = p22.hi = skvx::bit_pun(src[2]); + p33.lo = p33.hi = skvx::bit_pun(src[3]); + T.lo = t0; + T.hi = t1; + + float4 ab = unchecked_mix(p00, p11, T); + float4 bc = unchecked_mix(p11, p22, T); + float4 cd = unchecked_mix(p22, p33, T); + float4 abc = unchecked_mix(ab, bc, T); + float4 bcd = unchecked_mix(bc, cd, T); + float4 abcd = unchecked_mix(abc, bcd, T); + float4 middle = unchecked_mix(abc, bcd, skvx::shuffle<2,3,0,1>(T)); + + dst[0] = skvx::bit_pun(p00.lo); + dst[1] = skvx::bit_pun(ab.lo); + dst[2] = skvx::bit_pun(abc.lo); + dst[3] = skvx::bit_pun(abcd.lo); + middle.store(dst + 4); + dst[6] = skvx::bit_pun(abcd.hi); + dst[7] = skvx::bit_pun(bcd.hi); + dst[8] = skvx::bit_pun(cd.hi); + dst[9] = skvx::bit_pun(p33.hi); +} + +void SkChopCubicAt(const SkPoint src[4], SkPoint dst[], + const SkScalar tValues[], int tCount) { + SkASSERT(std::all_of(tValues, tValues + tCount, [](SkScalar t) { return t >= 0 && t <= 1; })); + SkASSERT(std::is_sorted(tValues, tValues + tCount)); + + if (dst) { + if (tCount == 0) { // nothing to chop + memcpy(dst, src, 4*sizeof(SkPoint)); + } else { + int i = 0; + for (; i < tCount - 1; i += 2) { + // Do two chops at once. + float2 tt = float2::Load(tValues + i); + if (i != 0) { + float lastT = tValues[i - 1]; + tt = skvx::pin((tt - lastT) / (1 - lastT), float2(0), float2(1)); + } + SkChopCubicAt(src, dst, tt[0], tt[1]); + src = dst = dst + 6; + } + if (i < tCount) { + // Chop the final cubic if there was an odd number of chops. + SkASSERT(i + 1 == tCount); + float t = tValues[i]; + if (i != 0) { + float lastT = tValues[i - 1]; + t = SkTPin(sk_ieee_float_divide(t - lastT, 1 - lastT), 0.f, 1.f); + } + SkChopCubicAt(src, dst, t); + } + } + } +} + +void SkChopCubicAtHalf(const SkPoint src[4], SkPoint dst[7]) { + SkChopCubicAt(src, dst, 0.5f); +} + +float SkMeasureNonInflectCubicRotation(const SkPoint pts[4]) { + SkVector a = pts[1] - pts[0]; + SkVector b = pts[2] - pts[1]; + SkVector c = pts[3] - pts[2]; + if (a.isZero()) { + return SkMeasureAngleBetweenVectors(b, c); + } + if (b.isZero()) { + return SkMeasureAngleBetweenVectors(a, c); + } + if (c.isZero()) { + return SkMeasureAngleBetweenVectors(a, b); + } + // Postulate: When no points are colocated and there are no inflection points in T=0..1, the + // rotation is: 360 degrees, minus the angle [p0,p1,p2], minus the angle [p1,p2,p3]. + return 2*SK_ScalarPI - SkMeasureAngleBetweenVectors(a,-b) - SkMeasureAngleBetweenVectors(b,-c); +} + +static skvx::float4 fma(const skvx::float4& f, float m, const skvx::float4& a) { + return skvx::fma(f, skvx::float4(m), a); +} + +// Finds the root nearest 0.5. Returns 0.5 if the roots are undefined or outside 0..1. +static float solve_quadratic_equation_for_midtangent(float a, float b, float c, float discr) { + // Quadratic formula from Numerical Recipes in C: + float q = -.5f * (b + copysignf(sqrtf(discr), b)); + // The roots are q/a and c/q. Pick the midtangent closer to T=.5. + float _5qa = -.5f*q*a; + float T = fabsf(q*q + _5qa) < fabsf(a*c + _5qa) ? sk_ieee_float_divide(q,a) + : sk_ieee_float_divide(c,q); + if (!(T > 0 && T < 1)) { // Use "!(positive_logic)" so T=NaN will take this branch. + // Either the curve is a flat line with no rotation or FP precision failed us. Chop at .5. + T = .5; + } + return T; +} + +static float solve_quadratic_equation_for_midtangent(float a, float b, float c) { + return solve_quadratic_equation_for_midtangent(a, b, c, b*b - 4*a*c); +} + +float SkFindCubicMidTangent(const SkPoint src[4]) { + // Tangents point in the direction of increasing T, so tan0 and -tan1 both point toward the + // midtangent. The bisector of tan0 and -tan1 is orthogonal to the midtangent: + // + // bisector dot midtangent == 0 + // + SkVector tan0 = (src[0] == src[1]) ? src[2] - src[0] : src[1] - src[0]; + SkVector tan1 = (src[2] == src[3]) ? src[3] - src[1] : src[3] - src[2]; + SkVector bisector = SkFindBisector(tan0, -tan1); + + // Find the T value at the midtangent. This is a simple quadratic equation: + // + // midtangent dot bisector == 0, or using a tangent matrix C' in power basis form: + // + // |C'x C'y| + // |T^2 T 1| * |. . | * |bisector.x| == 0 + // |. . | |bisector.y| + // + // The coeffs for the quadratic equation we need to solve are therefore: C' * bisector + static const skvx::float4 kM[4] = {skvx::float4(-1, 2, -1, 0), + skvx::float4( 3, -4, 1, 0), + skvx::float4(-3, 2, 0, 0)}; + auto C_x = fma(kM[0], src[0].fX, + fma(kM[1], src[1].fX, + fma(kM[2], src[2].fX, skvx::float4(src[3].fX, 0,0,0)))); + auto C_y = fma(kM[0], src[0].fY, + fma(kM[1], src[1].fY, + fma(kM[2], src[2].fY, skvx::float4(src[3].fY, 0,0,0)))); + auto coeffs = C_x * bisector.x() + C_y * bisector.y(); + + // Now solve the quadratic for T. + float T = 0; + float a=coeffs[0], b=coeffs[1], c=coeffs[2]; + float discr = b*b - 4*a*c; + if (discr > 0) { // This will only be false if the curve is a line. + return solve_quadratic_equation_for_midtangent(a, b, c, discr); + } else { + // This is a 0- or 360-degree flat line. It doesn't have single points of midtangent. + // (tangent == midtangent at every point on the curve except the cusp points.) + // Chop in between both cusps instead, if any. There can be up to two cusps on a flat line, + // both where the tangent is perpendicular to the starting tangent: + // + // tangent dot tan0 == 0 + // + coeffs = C_x * tan0.x() + C_y * tan0.y(); + a = coeffs[0]; + b = coeffs[1]; + if (a != 0) { + // We want the point in between both cusps. The midpoint of: + // + // (-b +/- sqrt(b^2 - 4*a*c)) / (2*a) + // + // Is equal to: + // + // -b / (2*a) + T = -b / (2*a); + } + if (!(T > 0 && T < 1)) { // Use "!(positive_logic)" so T=NaN will take this branch. + // Either the curve is a flat line with no rotation or FP precision failed us. Chop at + // .5. + T = .5; + } + return T; + } +} + +static void flatten_double_cubic_extrema(SkScalar coords[14]) { + coords[4] = coords[8] = coords[6]; +} + +/** Given 4 points on a cubic bezier, chop it into 1, 2, 3 beziers such that + the resulting beziers are monotonic in Y. This is called by the scan + converter. Depending on what is returned, dst[] is treated as follows: + 0 dst[0..3] is the original cubic + 1 dst[0..3] and dst[3..6] are the two new cubics + 2 dst[0..3], dst[3..6], dst[6..9] are the three new cubics + If dst == null, it is ignored and only the count is returned. +*/ +int SkChopCubicAtYExtrema(const SkPoint src[4], SkPoint dst[10]) { + SkScalar tValues[2]; + int roots = SkFindCubicExtrema(src[0].fY, src[1].fY, src[2].fY, + src[3].fY, tValues); + + SkChopCubicAt(src, dst, tValues, roots); + if (dst && roots > 0) { + // we do some cleanup to ensure our Y extrema are flat + flatten_double_cubic_extrema(&dst[0].fY); + if (roots == 2) { + flatten_double_cubic_extrema(&dst[3].fY); + } + } + return roots; +} + +int SkChopCubicAtXExtrema(const SkPoint src[4], SkPoint dst[10]) { + SkScalar tValues[2]; + int roots = SkFindCubicExtrema(src[0].fX, src[1].fX, src[2].fX, + src[3].fX, tValues); + + SkChopCubicAt(src, dst, tValues, roots); + if (dst && roots > 0) { + // we do some cleanup to ensure our Y extrema are flat + flatten_double_cubic_extrema(&dst[0].fX); + if (roots == 2) { + flatten_double_cubic_extrema(&dst[3].fX); + } + } + return roots; +} + +/** http://www.faculty.idc.ac.il/arik/quality/appendixA.html + + Inflection means that curvature is zero. + Curvature is [F' x F''] / [F'^3] + So we solve F'x X F''y - F'y X F''y == 0 + After some canceling of the cubic term, we get + A = b - a + B = c - 2b + a + C = d - 3c + 3b - a + (BxCy - ByCx)t^2 + (AxCy - AyCx)t + AxBy - AyBx == 0 +*/ +int SkFindCubicInflections(const SkPoint src[4], SkScalar tValues[2]) { + SkScalar Ax = src[1].fX - src[0].fX; + SkScalar Ay = src[1].fY - src[0].fY; + SkScalar Bx = src[2].fX - 2 * src[1].fX + src[0].fX; + SkScalar By = src[2].fY - 2 * src[1].fY + src[0].fY; + SkScalar Cx = src[3].fX + 3 * (src[1].fX - src[2].fX) - src[0].fX; + SkScalar Cy = src[3].fY + 3 * (src[1].fY - src[2].fY) - src[0].fY; + + return SkFindUnitQuadRoots(Bx*Cy - By*Cx, + Ax*Cy - Ay*Cx, + Ax*By - Ay*Bx, + tValues); +} + +int SkChopCubicAtInflections(const SkPoint src[4], SkPoint dst[10]) { + SkScalar tValues[2]; + int count = SkFindCubicInflections(src, tValues); + + if (dst) { + if (count == 0) { + memcpy(dst, src, 4 * sizeof(SkPoint)); + } else { + SkChopCubicAt(src, dst, tValues, count); + } + } + return count + 1; +} + +// Assumes the third component of points is 1. +// Calcs p0 . (p1 x p2) +static double calc_dot_cross_cubic(const SkPoint& p0, const SkPoint& p1, const SkPoint& p2) { + const double xComp = (double) p0.fX * ((double) p1.fY - (double) p2.fY); + const double yComp = (double) p0.fY * ((double) p2.fX - (double) p1.fX); + const double wComp = (double) p1.fX * (double) p2.fY - (double) p1.fY * (double) p2.fX; + return (xComp + yComp + wComp); +} + +// Returns a positive power of 2 that, when multiplied by n, and excepting the two edge cases listed +// below, shifts the exponent of n to yield a magnitude somewhere inside [1..2). +// Returns 2^1023 if abs(n) < 2^-1022 (including 0). +// Returns NaN if n is Inf or NaN. +inline static double previous_inverse_pow2(double n) { + uint64_t bits; + memcpy(&bits, &n, sizeof(double)); + bits = ((1023llu*2 << 52) + ((1llu << 52) - 1)) - bits; // exp=-exp + bits &= (0x7ffllu) << 52; // mantissa=1.0, sign=0 + memcpy(&n, &bits, sizeof(double)); + return n; +} + +inline static void write_cubic_inflection_roots(double t0, double s0, double t1, double s1, + double* t, double* s) { + t[0] = t0; + s[0] = s0; + + // This copysign/abs business orients the implicit function so positive values are always on the + // "left" side of the curve. + t[1] = -copysign(t1, t1 * s1); + s[1] = -fabs(s1); + + // Ensure t[0]/s[0] <= t[1]/s[1] (s[1] is negative from above). + if (copysign(s[1], s[0]) * t[0] > -fabs(s[0]) * t[1]) { + using std::swap; + swap(t[0], t[1]); + swap(s[0], s[1]); + } +} + +SkCubicType SkClassifyCubic(const SkPoint P[4], double t[2], double s[2], double d[4]) { + // Find the cubic's inflection function, I = [T^3 -3T^2 3T -1] dot D. (D0 will always be 0 + // for integral cubics.) + // + // See "Resolution Independent Curve Rendering using Programmable Graphics Hardware", + // 4.2 Curve Categorization: + // + // https://www.microsoft.com/en-us/research/wp-content/uploads/2005/01/p1000-loop.pdf + double A1 = calc_dot_cross_cubic(P[0], P[3], P[2]); + double A2 = calc_dot_cross_cubic(P[1], P[0], P[3]); + double A3 = calc_dot_cross_cubic(P[2], P[1], P[0]); + + double D3 = 3 * A3; + double D2 = D3 - A2; + double D1 = D2 - A2 + A1; + + // Shift the exponents in D so the largest magnitude falls somewhere in 1..2. This protects us + // from overflow down the road while solving for roots and KLM functionals. + double Dmax = std::max(std::max(fabs(D1), fabs(D2)), fabs(D3)); + double norm = previous_inverse_pow2(Dmax); + D1 *= norm; + D2 *= norm; + D3 *= norm; + + if (d) { + d[3] = D3; + d[2] = D2; + d[1] = D1; + d[0] = 0; + } + + // Now use the inflection function to classify the cubic. + // + // See "Resolution Independent Curve Rendering using Programmable Graphics Hardware", + // 4.4 Integral Cubics: + // + // https://www.microsoft.com/en-us/research/wp-content/uploads/2005/01/p1000-loop.pdf + if (0 != D1) { + double discr = 3*D2*D2 - 4*D1*D3; + if (discr > 0) { // Serpentine. + if (t && s) { + double q = 3*D2 + copysign(sqrt(3*discr), D2); + write_cubic_inflection_roots(q, 6*D1, 2*D3, q, t, s); + } + return SkCubicType::kSerpentine; + } else if (discr < 0) { // Loop. + if (t && s) { + double q = D2 + copysign(sqrt(-discr), D2); + write_cubic_inflection_roots(q, 2*D1, 2*(D2*D2 - D3*D1), D1*q, t, s); + } + return SkCubicType::kLoop; + } else { // Cusp. + if (t && s) { + write_cubic_inflection_roots(D2, 2*D1, D2, 2*D1, t, s); + } + return SkCubicType::kLocalCusp; + } + } else { + if (0 != D2) { // Cusp at T=infinity. + if (t && s) { + write_cubic_inflection_roots(D3, 3*D2, 1, 0, t, s); // T1=infinity. + } + return SkCubicType::kCuspAtInfinity; + } else { // Degenerate. + if (t && s) { + write_cubic_inflection_roots(1, 0, 1, 0, t, s); // T0=T1=infinity. + } + return 0 != D3 ? SkCubicType::kQuadratic : SkCubicType::kLineOrPoint; + } + } +} + +template void bubble_sort(T array[], int count) { + for (int i = count - 1; i > 0; --i) + for (int j = i; j > 0; --j) + if (array[j] < array[j-1]) + { + T tmp(array[j]); + array[j] = array[j-1]; + array[j-1] = tmp; + } +} + +/** + * Given an array and count, remove all pair-wise duplicates from the array, + * keeping the existing sorting, and return the new count + */ +static int collaps_duplicates(SkScalar array[], int count) { + for (int n = count; n > 1; --n) { + if (array[0] == array[1]) { + for (int i = 1; i < n; ++i) { + array[i - 1] = array[i]; + } + count -= 1; + } else { + array += 1; + } + } + return count; +} + +#ifdef SK_DEBUG + +#define TEST_COLLAPS_ENTRY(array) array, std::size(array) + +static void test_collaps_duplicates() { + static bool gOnce; + if (gOnce) { return; } + gOnce = true; + const SkScalar src0[] = { 0 }; + const SkScalar src1[] = { 0, 0 }; + const SkScalar src2[] = { 0, 1 }; + const SkScalar src3[] = { 0, 0, 0 }; + const SkScalar src4[] = { 0, 0, 1 }; + const SkScalar src5[] = { 0, 1, 1 }; + const SkScalar src6[] = { 0, 1, 2 }; + const struct { + const SkScalar* fData; + int fCount; + int fCollapsedCount; + } data[] = { + { TEST_COLLAPS_ENTRY(src0), 1 }, + { TEST_COLLAPS_ENTRY(src1), 1 }, + { TEST_COLLAPS_ENTRY(src2), 2 }, + { TEST_COLLAPS_ENTRY(src3), 1 }, + { TEST_COLLAPS_ENTRY(src4), 2 }, + { TEST_COLLAPS_ENTRY(src5), 2 }, + { TEST_COLLAPS_ENTRY(src6), 3 }, + }; + for (size_t i = 0; i < std::size(data); ++i) { + SkScalar dst[3]; + memcpy(dst, data[i].fData, data[i].fCount * sizeof(dst[0])); + int count = collaps_duplicates(dst, data[i].fCount); + SkASSERT(data[i].fCollapsedCount == count); + for (int j = 1; j < count; ++j) { + SkASSERT(dst[j-1] < dst[j]); + } + } +} +#endif + +static SkScalar SkScalarCubeRoot(SkScalar x) { + return SkScalarPow(x, 0.3333333f); +} + +/* Solve coeff(t) == 0, returning the number of roots that + lie withing 0 < t < 1. + coeff[0]t^3 + coeff[1]t^2 + coeff[2]t + coeff[3] + + Eliminates repeated roots (so that all tValues are distinct, and are always + in increasing order. +*/ +static int solve_cubic_poly(const SkScalar coeff[4], SkScalar tValues[3]) { + if (SkScalarNearlyZero(coeff[0])) { // we're just a quadratic + return SkFindUnitQuadRoots(coeff[1], coeff[2], coeff[3], tValues); + } + + SkScalar a, b, c, Q, R; + + { + SkASSERT(coeff[0] != 0); + + SkScalar inva = SkScalarInvert(coeff[0]); + a = coeff[1] * inva; + b = coeff[2] * inva; + c = coeff[3] * inva; + } + Q = (a*a - b*3) / 9; + R = (2*a*a*a - 9*a*b + 27*c) / 54; + + SkScalar Q3 = Q * Q * Q; + SkScalar R2MinusQ3 = R * R - Q3; + SkScalar adiv3 = a / 3; + + if (R2MinusQ3 < 0) { // we have 3 real roots + // the divide/root can, due to finite precisions, be slightly outside of -1...1 + SkScalar theta = SkScalarACos(SkTPin(R / SkScalarSqrt(Q3), -1.0f, 1.0f)); + SkScalar neg2RootQ = -2 * SkScalarSqrt(Q); + + tValues[0] = SkTPin(neg2RootQ * SkScalarCos(theta/3) - adiv3, 0.0f, 1.0f); + tValues[1] = SkTPin(neg2RootQ * SkScalarCos((theta + 2*SK_ScalarPI)/3) - adiv3, 0.0f, 1.0f); + tValues[2] = SkTPin(neg2RootQ * SkScalarCos((theta - 2*SK_ScalarPI)/3) - adiv3, 0.0f, 1.0f); + SkDEBUGCODE(test_collaps_duplicates();) + + // now sort the roots + bubble_sort(tValues, 3); + return collaps_duplicates(tValues, 3); + } else { // we have 1 real root + SkScalar A = SkScalarAbs(R) + SkScalarSqrt(R2MinusQ3); + A = SkScalarCubeRoot(A); + if (R > 0) { + A = -A; + } + if (A != 0) { + A += Q / A; + } + tValues[0] = SkTPin(A - adiv3, 0.0f, 1.0f); + return 1; + } +} + +/* Looking for F' dot F'' == 0 + + A = b - a + B = c - 2b + a + C = d - 3c + 3b - a + + F' = 3Ct^2 + 6Bt + 3A + F'' = 6Ct + 6B + + F' dot F'' -> CCt^3 + 3BCt^2 + (2BB + CA)t + AB +*/ +static void formulate_F1DotF2(const SkScalar src[], SkScalar coeff[4]) { + SkScalar a = src[2] - src[0]; + SkScalar b = src[4] - 2 * src[2] + src[0]; + SkScalar c = src[6] + 3 * (src[2] - src[4]) - src[0]; + + coeff[0] = c * c; + coeff[1] = 3 * b * c; + coeff[2] = 2 * b * b + c * a; + coeff[3] = a * b; +} + +/* Looking for F' dot F'' == 0 + + A = b - a + B = c - 2b + a + C = d - 3c + 3b - a + + F' = 3Ct^2 + 6Bt + 3A + F'' = 6Ct + 6B + + F' dot F'' -> CCt^3 + 3BCt^2 + (2BB + CA)t + AB +*/ +int SkFindCubicMaxCurvature(const SkPoint src[4], SkScalar tValues[3]) { + SkScalar coeffX[4], coeffY[4]; + int i; + + formulate_F1DotF2(&src[0].fX, coeffX); + formulate_F1DotF2(&src[0].fY, coeffY); + + for (i = 0; i < 4; i++) { + coeffX[i] += coeffY[i]; + } + + int numRoots = solve_cubic_poly(coeffX, tValues); + // now remove extrema where the curvature is zero (mins) + // !!!! need a test for this !!!! + return numRoots; +} + +int SkChopCubicAtMaxCurvature(const SkPoint src[4], SkPoint dst[13], + SkScalar tValues[3]) { + SkScalar t_storage[3]; + + if (tValues == nullptr) { + tValues = t_storage; + } + + SkScalar roots[3]; + int rootCount = SkFindCubicMaxCurvature(src, roots); + + // Throw out values not inside 0..1. + int count = 0; + for (int i = 0; i < rootCount; ++i) { + if (0 < roots[i] && roots[i] < 1) { + tValues[count++] = roots[i]; + } + } + + if (dst) { + if (count == 0) { + memcpy(dst, src, 4 * sizeof(SkPoint)); + } else { + SkChopCubicAt(src, dst, tValues, count); + } + } + return count + 1; +} + +// Returns a constant proportional to the dimensions of the cubic. +// Constant found through experimentation -- maybe there's a better way.... +static SkScalar calc_cubic_precision(const SkPoint src[4]) { + return (SkPointPriv::DistanceToSqd(src[1], src[0]) + SkPointPriv::DistanceToSqd(src[2], src[1]) + + SkPointPriv::DistanceToSqd(src[3], src[2])) * 1e-8f; +} + +// Returns true if both points src[testIndex], src[testIndex+1] are in the same half plane defined +// by the line segment src[lineIndex], src[lineIndex+1]. +static bool on_same_side(const SkPoint src[4], int testIndex, int lineIndex) { + SkPoint origin = src[lineIndex]; + SkVector line = src[lineIndex + 1] - origin; + SkScalar crosses[2]; + for (int index = 0; index < 2; ++index) { + SkVector testLine = src[testIndex + index] - origin; + crosses[index] = line.cross(testLine); + } + return crosses[0] * crosses[1] >= 0; +} + +// Return location (in t) of cubic cusp, if there is one. +// Note that classify cubic code does not reliably return all cusp'd cubics, so +// it is not called here. +SkScalar SkFindCubicCusp(const SkPoint src[4]) { + // When the adjacent control point matches the end point, it behaves as if + // the cubic has a cusp: there's a point of max curvature where the derivative + // goes to zero. Ideally, this would be where t is zero or one, but math + // error makes not so. It is not uncommon to create cubics this way; skip them. + if (src[0] == src[1]) { + return -1; + } + if (src[2] == src[3]) { + return -1; + } + // Cubics only have a cusp if the line segments formed by the control and end points cross. + // Detect crossing if line ends are on opposite sides of plane formed by the other line. + if (on_same_side(src, 0, 2) || on_same_side(src, 2, 0)) { + return -1; + } + // Cubics may have multiple points of maximum curvature, although at most only + // one is a cusp. + SkScalar maxCurvature[3]; + int roots = SkFindCubicMaxCurvature(src, maxCurvature); + for (int index = 0; index < roots; ++index) { + SkScalar testT = maxCurvature[index]; + if (0 >= testT || testT >= 1) { // no need to consider max curvature on the end + continue; + } + // A cusp is at the max curvature, and also has a derivative close to zero. + // Choose the 'close to zero' meaning by comparing the derivative length + // with the overall cubic size. + SkVector dPt = eval_cubic_derivative(src, testT); + SkScalar dPtMagnitude = SkPointPriv::LengthSqd(dPt); + SkScalar precision = calc_cubic_precision(src); + if (dPtMagnitude < precision) { + // All three max curvature t values may be close to the cusp; + // return the first one. + return testT; + } + } + return -1; +} + +static bool close_enough_to_zero(double x) { + return std::fabs(x) < 0.00001; +} + +static bool first_axis_intersection(const double coefficients[8], bool yDirection, + double axisIntercept, double* solution) { + auto [A, B, C, D] = SkBezierCubic::ConvertToPolynomial(coefficients, yDirection); + D -= axisIntercept; + double roots[3] = {0, 0, 0}; + int count = SkCubics::RootsValidT(A, B, C, D, roots); + if (count == 0) { + return false; + } + // Verify that at least one of the roots is accurate. + for (int i = 0; i < count; i++) { + if (close_enough_to_zero(SkCubics::EvalAt(A, B, C, D, roots[i]))) { + *solution = roots[i]; + return true; + } + } + // None of the roots returned by our normal cubic solver were correct enough + // (e.g. https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55732) + // So we need to fallback to a more accurate solution. + count = SkCubics::BinarySearchRootsValidT(A, B, C, D, roots); + if (count == 0) { + return false; + } + for (int i = 0; i < count; i++) { + if (close_enough_to_zero(SkCubics::EvalAt(A, B, C, D, roots[i]))) { + *solution = roots[i]; + return true; + } + } + return false; +} + +bool SkChopMonoCubicAtY(const SkPoint src[4], SkScalar y, SkPoint dst[7]) { + double coefficients[8] = {src[0].fX, src[0].fY, src[1].fX, src[1].fY, + src[2].fX, src[2].fY, src[3].fX, src[3].fY}; + double solution = 0; + if (first_axis_intersection(coefficients, true, y, &solution)) { + double cubicPair[14]; + SkBezierCubic::Subdivide(coefficients, solution, cubicPair); + for (int i = 0; i < 7; i ++) { + dst[i].fX = sk_double_to_float(cubicPair[i*2]); + dst[i].fY = sk_double_to_float(cubicPair[i*2 + 1]); + } + return true; + } + return false; +} + +bool SkChopMonoCubicAtX(const SkPoint src[4], SkScalar x, SkPoint dst[7]) { + double coefficients[8] = {src[0].fX, src[0].fY, src[1].fX, src[1].fY, + src[2].fX, src[2].fY, src[3].fX, src[3].fY}; + double solution = 0; + if (first_axis_intersection(coefficients, false, x, &solution)) { + double cubicPair[14]; + SkBezierCubic::Subdivide(coefficients, solution, cubicPair); + for (int i = 0; i < 7; i ++) { + dst[i].fX = sk_double_to_float(cubicPair[i*2]); + dst[i].fY = sk_double_to_float(cubicPair[i*2 + 1]); + } + return true; + } + return false; +} + +/////////////////////////////////////////////////////////////////////////////// +// +// NURB representation for conics. Helpful explanations at: +// +// http://citeseerx.ist.psu.edu/viewdoc/ +// download?doi=10.1.1.44.5740&rep=rep1&type=ps +// and +// http://www.cs.mtu.edu/~shene/COURSES/cs3621/NOTES/spline/NURBS/RB-conics.html +// +// F = (A (1 - t)^2 + C t^2 + 2 B (1 - t) t w) +// ------------------------------------------ +// ((1 - t)^2 + t^2 + 2 (1 - t) t w) +// +// = {t^2 (P0 + P2 - 2 P1 w), t (-2 P0 + 2 P1 w), P0} +// ------------------------------------------------ +// {t^2 (2 - 2 w), t (-2 + 2 w), 1} +// + +// F' = 2 (C t (1 + t (-1 + w)) - A (-1 + t) (t (-1 + w) - w) + B (1 - 2 t) w) +// +// t^2 : (2 P0 - 2 P2 - 2 P0 w + 2 P2 w) +// t^1 : (-2 P0 + 2 P2 + 4 P0 w - 4 P1 w) +// t^0 : -2 P0 w + 2 P1 w +// +// We disregard magnitude, so we can freely ignore the denominator of F', and +// divide the numerator by 2 +// +// coeff[0] for t^2 +// coeff[1] for t^1 +// coeff[2] for t^0 +// +static void conic_deriv_coeff(const SkScalar src[], + SkScalar w, + SkScalar coeff[3]) { + const SkScalar P20 = src[4] - src[0]; + const SkScalar P10 = src[2] - src[0]; + const SkScalar wP10 = w * P10; + coeff[0] = w * P20 - P20; + coeff[1] = P20 - 2 * wP10; + coeff[2] = wP10; +} + +static bool conic_find_extrema(const SkScalar src[], SkScalar w, SkScalar* t) { + SkScalar coeff[3]; + conic_deriv_coeff(src, w, coeff); + + SkScalar tValues[2]; + int roots = SkFindUnitQuadRoots(coeff[0], coeff[1], coeff[2], tValues); + SkASSERT(0 == roots || 1 == roots); + + if (1 == roots) { + *t = tValues[0]; + return true; + } + return false; +} + +// We only interpolate one dimension at a time (the first, at +0, +3, +6). +static void p3d_interp(const SkScalar src[7], SkScalar dst[7], SkScalar t) { + SkScalar ab = SkScalarInterp(src[0], src[3], t); + SkScalar bc = SkScalarInterp(src[3], src[6], t); + dst[0] = ab; + dst[3] = SkScalarInterp(ab, bc, t); + dst[6] = bc; +} + +static void ratquad_mapTo3D(const SkPoint src[3], SkScalar w, SkPoint3 dst[3]) { + dst[0].set(src[0].fX * 1, src[0].fY * 1, 1); + dst[1].set(src[1].fX * w, src[1].fY * w, w); + dst[2].set(src[2].fX * 1, src[2].fY * 1, 1); +} + +static SkPoint project_down(const SkPoint3& src) { + return {src.fX / src.fZ, src.fY / src.fZ}; +} + +// return false if infinity or NaN is generated; caller must check +bool SkConic::chopAt(SkScalar t, SkConic dst[2]) const { + SkPoint3 tmp[3], tmp2[3]; + + ratquad_mapTo3D(fPts, fW, tmp); + + p3d_interp(&tmp[0].fX, &tmp2[0].fX, t); + p3d_interp(&tmp[0].fY, &tmp2[0].fY, t); + p3d_interp(&tmp[0].fZ, &tmp2[0].fZ, t); + + dst[0].fPts[0] = fPts[0]; + dst[0].fPts[1] = project_down(tmp2[0]); + dst[0].fPts[2] = project_down(tmp2[1]); dst[1].fPts[0] = dst[0].fPts[2]; + dst[1].fPts[1] = project_down(tmp2[2]); + dst[1].fPts[2] = fPts[2]; + + // to put in "standard form", where w0 and w2 are both 1, we compute the + // new w1 as sqrt(w1*w1/w0*w2) + // or + // w1 /= sqrt(w0*w2) + // + // However, in our case, we know that for dst[0]: + // w0 == 1, and for dst[1], w2 == 1 + // + SkScalar root = SkScalarSqrt(tmp2[1].fZ); + dst[0].fW = tmp2[0].fZ / root; + dst[1].fW = tmp2[2].fZ / root; + SkASSERT(sizeof(dst[0]) == sizeof(SkScalar) * 7); + SkASSERT(0 == offsetof(SkConic, fPts[0].fX)); + return SkScalarsAreFinite(&dst[0].fPts[0].fX, 7 * 2); +} + +void SkConic::chopAt(SkScalar t1, SkScalar t2, SkConic* dst) const { + if (0 == t1 || 1 == t2) { + if (0 == t1 && 1 == t2) { + *dst = *this; + return; + } else { + SkConic pair[2]; + if (this->chopAt(t1 ? t1 : t2, pair)) { + *dst = pair[SkToBool(t1)]; + return; + } + } + } + SkConicCoeff coeff(*this); + float2 tt1(t1); + float2 aXY = coeff.fNumer.eval(tt1); + float2 aZZ = coeff.fDenom.eval(tt1); + float2 midTT((t1 + t2) / 2); + float2 dXY = coeff.fNumer.eval(midTT); + float2 dZZ = coeff.fDenom.eval(midTT); + float2 tt2(t2); + float2 cXY = coeff.fNumer.eval(tt2); + float2 cZZ = coeff.fDenom.eval(tt2); + float2 bXY = times_2(dXY) - (aXY + cXY) * 0.5f; + float2 bZZ = times_2(dZZ) - (aZZ + cZZ) * 0.5f; + dst->fPts[0] = to_point(aXY / aZZ); + dst->fPts[1] = to_point(bXY / bZZ); + dst->fPts[2] = to_point(cXY / cZZ); + float2 ww = bZZ / sqrt(aZZ * cZZ); + dst->fW = ww[0]; +} + +SkPoint SkConic::evalAt(SkScalar t) const { + return to_point(SkConicCoeff(*this).eval(t)); +} + +SkVector SkConic::evalTangentAt(SkScalar t) const { + // The derivative equation returns a zero tangent vector when t is 0 or 1, + // and the control point is equal to the end point. + // In this case, use the conic endpoints to compute the tangent. + if ((t == 0 && fPts[0] == fPts[1]) || (t == 1 && fPts[1] == fPts[2])) { + return fPts[2] - fPts[0]; + } + float2 p0 = from_point(fPts[0]); + float2 p1 = from_point(fPts[1]); + float2 p2 = from_point(fPts[2]); + float2 ww(fW); + + float2 p20 = p2 - p0; + float2 p10 = p1 - p0; + + float2 C = ww * p10; + float2 A = ww * p20 - p20; + float2 B = p20 - C - C; + + return to_vector(SkQuadCoeff(A, B, C).eval(t)); +} + +void SkConic::evalAt(SkScalar t, SkPoint* pt, SkVector* tangent) const { + SkASSERT(t >= 0 && t <= SK_Scalar1); + + if (pt) { + *pt = this->evalAt(t); + } + if (tangent) { + *tangent = this->evalTangentAt(t); + } +} + +static SkScalar subdivide_w_value(SkScalar w) { + return SkScalarSqrt(SK_ScalarHalf + w * SK_ScalarHalf); +} + +void SkConic::chop(SkConic * SK_RESTRICT dst) const { + float2 scale = SkScalarInvert(SK_Scalar1 + fW); + SkScalar newW = subdivide_w_value(fW); + + float2 p0 = from_point(fPts[0]); + float2 p1 = from_point(fPts[1]); + float2 p2 = from_point(fPts[2]); + float2 ww(fW); + + float2 wp1 = ww * p1; + float2 m = (p0 + times_2(wp1) + p2) * scale * 0.5f; + SkPoint mPt = to_point(m); + if (!mPt.isFinite()) { + double w_d = fW; + double w_2 = w_d * 2; + double scale_half = 1 / (1 + w_d) * 0.5; + mPt.fX = SkDoubleToScalar((fPts[0].fX + w_2 * fPts[1].fX + fPts[2].fX) * scale_half); + mPt.fY = SkDoubleToScalar((fPts[0].fY + w_2 * fPts[1].fY + fPts[2].fY) * scale_half); + } + dst[0].fPts[0] = fPts[0]; + dst[0].fPts[1] = to_point((p0 + wp1) * scale); + dst[0].fPts[2] = dst[1].fPts[0] = mPt; + dst[1].fPts[1] = to_point((wp1 + p2) * scale); + dst[1].fPts[2] = fPts[2]; + + dst[0].fW = dst[1].fW = newW; +} + +/* + * "High order approximation of conic sections by quadratic splines" + * by Michael Floater, 1993 + */ +#define AS_QUAD_ERROR_SETUP \ + SkScalar a = fW - 1; \ + SkScalar k = a / (4 * (2 + a)); \ + SkScalar x = k * (fPts[0].fX - 2 * fPts[1].fX + fPts[2].fX); \ + SkScalar y = k * (fPts[0].fY - 2 * fPts[1].fY + fPts[2].fY); + +void SkConic::computeAsQuadError(SkVector* err) const { + AS_QUAD_ERROR_SETUP + err->set(x, y); +} + +bool SkConic::asQuadTol(SkScalar tol) const { + AS_QUAD_ERROR_SETUP + return (x * x + y * y) <= tol * tol; +} + +// Limit the number of suggested quads to approximate a conic +#define kMaxConicToQuadPOW2 5 + +int SkConic::computeQuadPOW2(SkScalar tol) const { + if (tol < 0 || !SkScalarIsFinite(tol) || !SkPointPriv::AreFinite(fPts, 3)) { + return 0; + } + + AS_QUAD_ERROR_SETUP + + SkScalar error = SkScalarSqrt(x * x + y * y); + int pow2; + for (pow2 = 0; pow2 < kMaxConicToQuadPOW2; ++pow2) { + if (error <= tol) { + break; + } + error *= 0.25f; + } + // float version -- using ceil gives the same results as the above. + if ((false)) { + SkScalar err = SkScalarSqrt(x * x + y * y); + if (err <= tol) { + return 0; + } + SkScalar tol2 = tol * tol; + if (tol2 == 0) { + return kMaxConicToQuadPOW2; + } + SkScalar fpow2 = SkScalarLog2((x * x + y * y) / tol2) * 0.25f; + int altPow2 = SkScalarCeilToInt(fpow2); + if (altPow2 != pow2) { + SkDebugf("pow2 %d altPow2 %d fbits %g err %g tol %g\n", pow2, altPow2, fpow2, err, tol); + } + pow2 = altPow2; + } + return pow2; +} + +// This was originally developed and tested for pathops: see SkOpTypes.h +// returns true if (a <= b <= c) || (a >= b >= c) +static bool between(SkScalar a, SkScalar b, SkScalar c) { + return (a - b) * (c - b) <= 0; +} + +static SkPoint* subdivide(const SkConic& src, SkPoint pts[], int level) { + SkASSERT(level >= 0); + + if (0 == level) { + memcpy(pts, &src.fPts[1], 2 * sizeof(SkPoint)); + return pts + 2; + } else { + SkConic dst[2]; + src.chop(dst); + const SkScalar startY = src.fPts[0].fY; + SkScalar endY = src.fPts[2].fY; + if (between(startY, src.fPts[1].fY, endY)) { + // If the input is monotonic and the output is not, the scan converter hangs. + // Ensure that the chopped conics maintain their y-order. + SkScalar midY = dst[0].fPts[2].fY; + if (!between(startY, midY, endY)) { + // If the computed midpoint is outside the ends, move it to the closer one. + SkScalar closerY = SkTAbs(midY - startY) < SkTAbs(midY - endY) ? startY : endY; + dst[0].fPts[2].fY = dst[1].fPts[0].fY = closerY; + } + if (!between(startY, dst[0].fPts[1].fY, dst[0].fPts[2].fY)) { + // If the 1st control is not between the start and end, put it at the start. + // This also reduces the quad to a line. + dst[0].fPts[1].fY = startY; + } + if (!between(dst[1].fPts[0].fY, dst[1].fPts[1].fY, endY)) { + // If the 2nd control is not between the start and end, put it at the end. + // This also reduces the quad to a line. + dst[1].fPts[1].fY = endY; + } + // Verify that all five points are in order. + SkASSERT(between(startY, dst[0].fPts[1].fY, dst[0].fPts[2].fY)); + SkASSERT(between(dst[0].fPts[1].fY, dst[0].fPts[2].fY, dst[1].fPts[1].fY)); + SkASSERT(between(dst[0].fPts[2].fY, dst[1].fPts[1].fY, endY)); + } + --level; + pts = subdivide(dst[0], pts, level); + return subdivide(dst[1], pts, level); + } +} + +int SkConic::chopIntoQuadsPOW2(SkPoint pts[], int pow2) const { + SkASSERT(pow2 >= 0); + *pts = fPts[0]; + SkDEBUGCODE(SkPoint* endPts); + if (pow2 == kMaxConicToQuadPOW2) { // If an extreme weight generates many quads ... + SkConic dst[2]; + this->chop(dst); + // check to see if the first chop generates a pair of lines + if (SkPointPriv::EqualsWithinTolerance(dst[0].fPts[1], dst[0].fPts[2]) && + SkPointPriv::EqualsWithinTolerance(dst[1].fPts[0], dst[1].fPts[1])) { + pts[1] = pts[2] = pts[3] = dst[0].fPts[1]; // set ctrl == end to make lines + pts[4] = dst[1].fPts[2]; + pow2 = 1; + SkDEBUGCODE(endPts = &pts[5]); + goto commonFinitePtCheck; + } + } + SkDEBUGCODE(endPts = ) subdivide(*this, pts + 1, pow2); +commonFinitePtCheck: + const int quadCount = 1 << pow2; + const int ptCount = 2 * quadCount + 1; + SkASSERT(endPts - pts == ptCount); + if (!SkPointPriv::AreFinite(pts, ptCount)) { + // if we generated a non-finite, pin ourselves to the middle of the hull, + // as our first and last are already on the first/last pts of the hull. + for (int i = 1; i < ptCount - 1; ++i) { + pts[i] = fPts[1]; + } + } + return 1 << pow2; +} + +float SkConic::findMidTangent() const { + // Tangents point in the direction of increasing T, so tan0 and -tan1 both point toward the + // midtangent. The bisector of tan0 and -tan1 is orthogonal to the midtangent: + // + // bisector dot midtangent = 0 + // + SkVector tan0 = fPts[1] - fPts[0]; + SkVector tan1 = fPts[2] - fPts[1]; + SkVector bisector = SkFindBisector(tan0, -tan1); + + // Start by finding the tangent function's power basis coefficients. These define a tangent + // direction (scaled by some uniform value) as: + // |T^2| + // Tangent_Direction(T) = dx,dy = |A B C| * |T | + // |. . .| |1 | + // + // The derivative of a conic has a cumbersome order-4 denominator. However, this isn't necessary + // if we are only interested in a vector in the same *direction* as a given tangent line. Since + // the denominator scales dx and dy uniformly, we can throw it out completely after evaluating + // the derivative with the standard quotient rule. This leaves us with a simpler quadratic + // function that we use to find a tangent. + SkVector A = (fPts[2] - fPts[0]) * (fW - 1); + SkVector B = (fPts[2] - fPts[0]) - (fPts[1] - fPts[0]) * (fW*2); + SkVector C = (fPts[1] - fPts[0]) * fW; + + // Now solve for "bisector dot midtangent = 0": + // + // |T^2| + // bisector * |A B C| * |T | = 0 + // |. . .| |1 | + // + float a = bisector.dot(A); + float b = bisector.dot(B); + float c = bisector.dot(C); + return solve_quadratic_equation_for_midtangent(a, b, c); +} + +bool SkConic::findXExtrema(SkScalar* t) const { + return conic_find_extrema(&fPts[0].fX, fW, t); +} + +bool SkConic::findYExtrema(SkScalar* t) const { + return conic_find_extrema(&fPts[0].fY, fW, t); +} + +bool SkConic::chopAtXExtrema(SkConic dst[2]) const { + SkScalar t; + if (this->findXExtrema(&t)) { + if (!this->chopAt(t, dst)) { + // if chop can't return finite values, don't chop + return false; + } + // now clean-up the middle, since we know t was meant to be at + // an X-extrema + SkScalar value = dst[0].fPts[2].fX; + dst[0].fPts[1].fX = value; + dst[1].fPts[0].fX = value; + dst[1].fPts[1].fX = value; + return true; + } + return false; +} + +bool SkConic::chopAtYExtrema(SkConic dst[2]) const { + SkScalar t; + if (this->findYExtrema(&t)) { + if (!this->chopAt(t, dst)) { + // if chop can't return finite values, don't chop + return false; + } + // now clean-up the middle, since we know t was meant to be at + // an Y-extrema + SkScalar value = dst[0].fPts[2].fY; + dst[0].fPts[1].fY = value; + dst[1].fPts[0].fY = value; + dst[1].fPts[1].fY = value; + return true; + } + return false; +} + +void SkConic::computeTightBounds(SkRect* bounds) const { + SkPoint pts[4]; + pts[0] = fPts[0]; + pts[1] = fPts[2]; + int count = 2; + + SkScalar t; + if (this->findXExtrema(&t)) { + this->evalAt(t, &pts[count++]); + } + if (this->findYExtrema(&t)) { + this->evalAt(t, &pts[count++]); + } + bounds->setBounds(pts, count); +} + +void SkConic::computeFastBounds(SkRect* bounds) const { + bounds->setBounds(fPts, 3); +} + +#if 0 // unimplemented +bool SkConic::findMaxCurvature(SkScalar* t) const { + // TODO: Implement me + return false; +} +#endif + +SkScalar SkConic::TransformW(const SkPoint pts[3], SkScalar w, const SkMatrix& matrix) { + if (!matrix.hasPerspective()) { + return w; + } + + SkPoint3 src[3], dst[3]; + + ratquad_mapTo3D(pts, w, src); + + matrix.mapHomogeneousPoints(dst, src, 3); + + // w' = sqrt(w1*w1/w0*w2) + // use doubles temporarily, to handle small numer/denom + double w0 = dst[0].fZ; + double w1 = dst[1].fZ; + double w2 = dst[2].fZ; + return sk_double_to_float(sqrt(sk_ieee_double_divide(w1 * w1, w0 * w2))); +} + +int SkConic::BuildUnitArc(const SkVector& uStart, const SkVector& uStop, SkRotationDirection dir, + const SkMatrix* userMatrix, SkConic dst[kMaxConicsForArc]) { + // rotate by x,y so that uStart is (1.0) + SkScalar x = SkPoint::DotProduct(uStart, uStop); + SkScalar y = SkPoint::CrossProduct(uStart, uStop); + + SkScalar absY = SkScalarAbs(y); + + // check for (effectively) coincident vectors + // this can happen if our angle is nearly 0 or nearly 180 (y == 0) + // ... we use the dot-prod to distinguish between 0 and 180 (x > 0) + if (absY <= SK_ScalarNearlyZero && x > 0 && ((y >= 0 && kCW_SkRotationDirection == dir) || + (y <= 0 && kCCW_SkRotationDirection == dir))) { + return 0; + } + + if (dir == kCCW_SkRotationDirection) { + y = -y; + } + + // We decide to use 1-conic per quadrant of a circle. What quadrant does [xy] lie in? + // 0 == [0 .. 90) + // 1 == [90 ..180) + // 2 == [180..270) + // 3 == [270..360) + // + int quadrant = 0; + if (0 == y) { + quadrant = 2; // 180 + SkASSERT(SkScalarAbs(x + SK_Scalar1) <= SK_ScalarNearlyZero); + } else if (0 == x) { + SkASSERT(absY - SK_Scalar1 <= SK_ScalarNearlyZero); + quadrant = y > 0 ? 1 : 3; // 90 : 270 + } else { + if (y < 0) { + quadrant += 2; + } + if ((x < 0) != (y < 0)) { + quadrant += 1; + } + } + + const SkPoint quadrantPts[] = { + { 1, 0 }, { 1, 1 }, { 0, 1 }, { -1, 1 }, { -1, 0 }, { -1, -1 }, { 0, -1 }, { 1, -1 } + }; + const SkScalar quadrantWeight = SK_ScalarRoot2Over2; + + int conicCount = quadrant; + for (int i = 0; i < conicCount; ++i) { + dst[i].set(&quadrantPts[i * 2], quadrantWeight); + } + + // Now compute any remaing (sub-90-degree) arc for the last conic + const SkPoint finalP = { x, y }; + const SkPoint& lastQ = quadrantPts[quadrant * 2]; // will already be a unit-vector + const SkScalar dot = SkVector::DotProduct(lastQ, finalP); + if (!SkScalarIsFinite(dot)) { + return 0; + } + SkASSERT(0 <= dot && dot <= SK_Scalar1 + SK_ScalarNearlyZero); + + if (dot < 1) { + SkVector offCurve = { lastQ.x() + x, lastQ.y() + y }; + // compute the bisector vector, and then rescale to be the off-curve point. + // we compute its length from cos(theta/2) = length / 1, using half-angle identity we get + // length = sqrt(2 / (1 + cos(theta)). We already have cos() when to computed the dot. + // This is nice, since our computed weight is cos(theta/2) as well! + // + const SkScalar cosThetaOver2 = SkScalarSqrt((1 + dot) / 2); + offCurve.setLength(SkScalarInvert(cosThetaOver2)); + if (!SkPointPriv::EqualsWithinTolerance(lastQ, offCurve)) { + dst[conicCount].set(lastQ, offCurve, finalP, cosThetaOver2); + conicCount += 1; + } + } + + // now handle counter-clockwise and the initial unitStart rotation + SkMatrix matrix; + matrix.setSinCos(uStart.fY, uStart.fX); + if (dir == kCCW_SkRotationDirection) { + matrix.preScale(SK_Scalar1, -SK_Scalar1); + } + if (userMatrix) { + matrix.postConcat(*userMatrix); + } + for (int i = 0; i < conicCount; ++i) { + matrix.mapPoints(dst[i].fPts, 3); + } + return conicCount; +} diff --git a/gfx/skia/skia/src/core/SkGeometry.h b/gfx/skia/skia/src/core/SkGeometry.h new file mode 100644 index 0000000000..e8c9a05ad1 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGeometry.h @@ -0,0 +1,543 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGeometry_DEFINED +#define SkGeometry_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "src/base/SkVx.h" + +#include + +class SkMatrix; +struct SkRect; + +static inline skvx::float2 from_point(const SkPoint& point) { + return skvx::float2::Load(&point); +} + +static inline SkPoint to_point(const skvx::float2& x) { + SkPoint point; + x.store(&point); + return point; +} + +static skvx::float2 times_2(const skvx::float2& value) { + return value + value; +} + +/** Given a quadratic equation Ax^2 + Bx + C = 0, return 0, 1, 2 roots for the + equation. +*/ +int SkFindUnitQuadRoots(SkScalar A, SkScalar B, SkScalar C, SkScalar roots[2]); + +/** Measures the angle between two vectors, in the range [0, pi]. +*/ +float SkMeasureAngleBetweenVectors(SkVector, SkVector); + +/** Returns a new, arbitrarily scaled vector that bisects the given vectors. The returned bisector + will always point toward the interior of the provided vectors. +*/ +SkVector SkFindBisector(SkVector, SkVector); + +/////////////////////////////////////////////////////////////////////////////// + +SkPoint SkEvalQuadAt(const SkPoint src[3], SkScalar t); +SkPoint SkEvalQuadTangentAt(const SkPoint src[3], SkScalar t); + +/** Set pt to the point on the src quadratic specified by t. t must be + 0 <= t <= 1.0 +*/ +void SkEvalQuadAt(const SkPoint src[3], SkScalar t, SkPoint* pt, SkVector* tangent = nullptr); + +/** Given a src quadratic bezier, chop it at the specified t value, + where 0 < t < 1, and return the two new quadratics in dst: + dst[0..2] and dst[2..4] +*/ +void SkChopQuadAt(const SkPoint src[3], SkPoint dst[5], SkScalar t); + +/** Given a src quadratic bezier, chop it at the specified t == 1/2, + The new quads are returned in dst[0..2] and dst[2..4] +*/ +void SkChopQuadAtHalf(const SkPoint src[3], SkPoint dst[5]); + +/** Measures the rotation of the given quadratic curve in radians. + + Rotation is perhaps easiest described via a driving analogy: If you drive your car along the + curve from p0 to p2, then by the time you arrive at p2, how many radians will your car have + rotated? For a quadratic this is the same as the vector inside the tangents at the endpoints. + + Quadratics can have rotations in the range [0, pi]. +*/ +inline float SkMeasureQuadRotation(const SkPoint pts[3]) { + return SkMeasureAngleBetweenVectors(pts[1] - pts[0], pts[2] - pts[1]); +} + +/** Given a src quadratic bezier, returns the T value whose tangent angle is halfway between the + tangents at p0 and p3. +*/ +float SkFindQuadMidTangent(const SkPoint src[3]); + +/** Given a src quadratic bezier, chop it at the tangent whose angle is halfway between the + tangents at p0 and p2. The new quads are returned in dst[0..2] and dst[2..4]. +*/ +inline void SkChopQuadAtMidTangent(const SkPoint src[3], SkPoint dst[5]) { + SkChopQuadAt(src, dst, SkFindQuadMidTangent(src)); +} + +/** Given the 3 coefficients for a quadratic bezier (either X or Y values), look + for extrema, and return the number of t-values that are found that represent + these extrema. If the quadratic has no extrema betwee (0..1) exclusive, the + function returns 0. + Returned count tValues[] + 0 ignored + 1 0 < tValues[0] < 1 +*/ +int SkFindQuadExtrema(SkScalar a, SkScalar b, SkScalar c, SkScalar tValues[1]); + +/** Given 3 points on a quadratic bezier, chop it into 1, 2 beziers such that + the resulting beziers are monotonic in Y. This is called by the scan converter. + Depending on what is returned, dst[] is treated as follows + 0 dst[0..2] is the original quad + 1 dst[0..2] and dst[2..4] are the two new quads +*/ +int SkChopQuadAtYExtrema(const SkPoint src[3], SkPoint dst[5]); +int SkChopQuadAtXExtrema(const SkPoint src[3], SkPoint dst[5]); + +/** Given 3 points on a quadratic bezier, if the point of maximum + curvature exists on the segment, returns the t value for this + point along the curve. Otherwise it will return a value of 0. +*/ +SkScalar SkFindQuadMaxCurvature(const SkPoint src[3]); + +/** Given 3 points on a quadratic bezier, divide it into 2 quadratics + if the point of maximum curvature exists on the quad segment. + Depending on what is returned, dst[] is treated as follows + 1 dst[0..2] is the original quad + 2 dst[0..2] and dst[2..4] are the two new quads + If dst == null, it is ignored and only the count is returned. +*/ +int SkChopQuadAtMaxCurvature(const SkPoint src[3], SkPoint dst[5]); + +/** Given 3 points on a quadratic bezier, use degree elevation to + convert it into the cubic fitting the same curve. The new cubic + curve is returned in dst[0..3]. +*/ +void SkConvertQuadToCubic(const SkPoint src[3], SkPoint dst[4]); + +/////////////////////////////////////////////////////////////////////////////// + +/** Set pt to the point on the src cubic specified by t. t must be + 0 <= t <= 1.0 +*/ +void SkEvalCubicAt(const SkPoint src[4], SkScalar t, SkPoint* locOrNull, + SkVector* tangentOrNull, SkVector* curvatureOrNull); + +/** Given a src cubic bezier, chop it at the specified t value, + where 0 <= t <= 1, and return the two new cubics in dst: + dst[0..3] and dst[3..6] +*/ +void SkChopCubicAt(const SkPoint src[4], SkPoint dst[7], SkScalar t); + +/** Given a src cubic bezier, chop it at the specified t0 and t1 values, + where 0 <= t0 <= t1 <= 1, and return the three new cubics in dst: + dst[0..3], dst[3..6], and dst[6..9] +*/ +void SkChopCubicAt(const SkPoint src[4], SkPoint dst[10], float t0, float t1); + +/** Given a src cubic bezier, chop it at the specified t values, + where 0 <= t0 <= t1 <= ... <= 1, and return the new cubics in dst: + dst[0..3],dst[3..6],...,dst[3*t_count..3*(t_count+1)] +*/ +void SkChopCubicAt(const SkPoint src[4], SkPoint dst[], const SkScalar t[], + int t_count); + +/** Given a src cubic bezier, chop it at the specified t == 1/2, + The new cubics are returned in dst[0..3] and dst[3..6] +*/ +void SkChopCubicAtHalf(const SkPoint src[4], SkPoint dst[7]); + +/** Given a cubic curve with no inflection points, this method measures the rotation in radians. + + Rotation is perhaps easiest described via a driving analogy: If you drive your car along the + curve from p0 to p3, then by the time you arrive at p3, how many radians will your car have + rotated? This is not quite the same as the vector inside the tangents at the endpoints, even + without inflection, because the curve might rotate around the outside of the + tangents (>= 180 degrees) or the inside (<= 180 degrees). + + Cubics can have rotations in the range [0, 2*pi]. + + NOTE: The caller must either call SkChopCubicAtInflections or otherwise prove that the provided + cubic has no inflection points prior to calling this method. +*/ +float SkMeasureNonInflectCubicRotation(const SkPoint[4]); + +/** Given a src cubic bezier, returns the T value whose tangent angle is halfway between the + tangents at p0 and p3. +*/ +float SkFindCubicMidTangent(const SkPoint src[4]); + +/** Given a src cubic bezier, chop it at the tangent whose angle is halfway between the + tangents at p0 and p3. The new cubics are returned in dst[0..3] and dst[3..6]. + + NOTE: 0- and 360-degree flat lines don't have single points of midtangent. + (tangent == midtangent at every point on these curves except the cusp points.) + If this is the case then we simply chop at a point which guarantees neither side rotates more + than 180 degrees. +*/ +inline void SkChopCubicAtMidTangent(const SkPoint src[4], SkPoint dst[7]) { + SkChopCubicAt(src, dst, SkFindCubicMidTangent(src)); +} + +/** Given the 4 coefficients for a cubic bezier (either X or Y values), look + for extrema, and return the number of t-values that are found that represent + these extrema. If the cubic has no extrema betwee (0..1) exclusive, the + function returns 0. + Returned count tValues[] + 0 ignored + 1 0 < tValues[0] < 1 + 2 0 < tValues[0] < tValues[1] < 1 +*/ +int SkFindCubicExtrema(SkScalar a, SkScalar b, SkScalar c, SkScalar d, + SkScalar tValues[2]); + +/** Given 4 points on a cubic bezier, chop it into 1, 2, 3 beziers such that + the resulting beziers are monotonic in Y. This is called by the scan converter. + Depending on what is returned, dst[] is treated as follows + 0 dst[0..3] is the original cubic + 1 dst[0..3] and dst[3..6] are the two new cubics + 2 dst[0..3], dst[3..6], dst[6..9] are the three new cubics + If dst == null, it is ignored and only the count is returned. +*/ +int SkChopCubicAtYExtrema(const SkPoint src[4], SkPoint dst[10]); +int SkChopCubicAtXExtrema(const SkPoint src[4], SkPoint dst[10]); + +/** Given a cubic bezier, return 0, 1, or 2 t-values that represent the + inflection points. +*/ +int SkFindCubicInflections(const SkPoint src[4], SkScalar tValues[2]); + +/** Return 1 for no chop, 2 for having chopped the cubic at a single + inflection point, 3 for having chopped at 2 inflection points. + dst will hold the resulting 1, 2, or 3 cubics. +*/ +int SkChopCubicAtInflections(const SkPoint src[4], SkPoint dst[10]); + +int SkFindCubicMaxCurvature(const SkPoint src[4], SkScalar tValues[3]); +int SkChopCubicAtMaxCurvature(const SkPoint src[4], SkPoint dst[13], + SkScalar tValues[3] = nullptr); +/** Returns t value of cusp if cubic has one; returns -1 otherwise. + */ +SkScalar SkFindCubicCusp(const SkPoint src[4]); + +/** Given a monotonically increasing or decreasing cubic bezier src, chop it + * where the X value is the specified value. The returned cubics will be in + * dst, sharing the middle point. That is, the first cubic is dst[0..3] and + * the second dst[3..6]. + * + * If the cubic provided is *not* monotone, it will be chopped at the first + * time the curve has the specified X value. + * + * If the cubic never reaches the specified value, the function returns false. +*/ +bool SkChopMonoCubicAtX(const SkPoint src[4], SkScalar x, SkPoint dst[7]); + +/** Given a monotonically increasing or decreasing cubic bezier src, chop it + * where the Y value is the specified value. The returned cubics will be in + * dst, sharing the middle point. That is, the first cubic is dst[0..3] and + * the second dst[3..6]. + * + * If the cubic provided is *not* monotone, it will be chopped at the first + * time the curve has the specified Y value. + * + * If the cubic never reaches the specified value, the function returns false. +*/ +bool SkChopMonoCubicAtY(const SkPoint src[4], SkScalar y, SkPoint dst[7]); + +enum class SkCubicType { + kSerpentine, + kLoop, + kLocalCusp, // Cusp at a non-infinite parameter value with an inflection at t=infinity. + kCuspAtInfinity, // Cusp with a cusp at t=infinity and a local inflection. + kQuadratic, + kLineOrPoint +}; + +static inline bool SkCubicIsDegenerate(SkCubicType type) { + switch (type) { + case SkCubicType::kSerpentine: + case SkCubicType::kLoop: + case SkCubicType::kLocalCusp: + case SkCubicType::kCuspAtInfinity: + return false; + case SkCubicType::kQuadratic: + case SkCubicType::kLineOrPoint: + return true; + } + SK_ABORT("Invalid SkCubicType"); +} + +static inline const char* SkCubicTypeName(SkCubicType type) { + switch (type) { + case SkCubicType::kSerpentine: return "kSerpentine"; + case SkCubicType::kLoop: return "kLoop"; + case SkCubicType::kLocalCusp: return "kLocalCusp"; + case SkCubicType::kCuspAtInfinity: return "kCuspAtInfinity"; + case SkCubicType::kQuadratic: return "kQuadratic"; + case SkCubicType::kLineOrPoint: return "kLineOrPoint"; + } + SK_ABORT("Invalid SkCubicType"); +} + +/** Returns the cubic classification. + + t[],s[] are set to the two homogeneous parameter values at which points the lines L & M + intersect with K, sorted from smallest to largest and oriented so positive values of the + implicit are on the "left" side. For a serpentine curve they are the inflection points. For a + loop they are the double point. For a local cusp, they are both equal and denote the cusp point. + For a cusp at an infinite parameter value, one will be the local inflection point and the other + +inf (t,s = 1,0). If the curve is degenerate (i.e. quadratic or linear) they are both set to a + parameter value of +inf (t,s = 1,0). + + d[] is filled with the cubic inflection function coefficients. See "Resolution Independent + Curve Rendering using Programmable Graphics Hardware", 4.2 Curve Categorization: + + If the input points contain infinities or NaN, the return values are undefined. + + https://www.microsoft.com/en-us/research/wp-content/uploads/2005/01/p1000-loop.pdf +*/ +SkCubicType SkClassifyCubic(const SkPoint p[4], double t[2] = nullptr, double s[2] = nullptr, + double d[4] = nullptr); + +/////////////////////////////////////////////////////////////////////////////// + +enum SkRotationDirection { + kCW_SkRotationDirection, + kCCW_SkRotationDirection +}; + +struct SkConic { + SkConic() {} + SkConic(const SkPoint& p0, const SkPoint& p1, const SkPoint& p2, SkScalar w) { + fPts[0] = p0; + fPts[1] = p1; + fPts[2] = p2; + fW = w; + } + SkConic(const SkPoint pts[3], SkScalar w) { + memcpy(fPts, pts, sizeof(fPts)); + fW = w; + } + + SkPoint fPts[3]; + SkScalar fW; + + void set(const SkPoint pts[3], SkScalar w) { + memcpy(fPts, pts, 3 * sizeof(SkPoint)); + fW = w; + } + + void set(const SkPoint& p0, const SkPoint& p1, const SkPoint& p2, SkScalar w) { + fPts[0] = p0; + fPts[1] = p1; + fPts[2] = p2; + fW = w; + } + + /** + * Given a t-value [0...1] return its position and/or tangent. + * If pos is not null, return its position at the t-value. + * If tangent is not null, return its tangent at the t-value. NOTE the + * tangent value's length is arbitrary, and only its direction should + * be used. + */ + void evalAt(SkScalar t, SkPoint* pos, SkVector* tangent = nullptr) const; + bool SK_WARN_UNUSED_RESULT chopAt(SkScalar t, SkConic dst[2]) const; + void chopAt(SkScalar t1, SkScalar t2, SkConic* dst) const; + void chop(SkConic dst[2]) const; + + SkPoint evalAt(SkScalar t) const; + SkVector evalTangentAt(SkScalar t) const; + + void computeAsQuadError(SkVector* err) const; + bool asQuadTol(SkScalar tol) const; + + /** + * return the power-of-2 number of quads needed to approximate this conic + * with a sequence of quads. Will be >= 0. + */ + int SK_SPI computeQuadPOW2(SkScalar tol) const; + + /** + * Chop this conic into N quads, stored continguously in pts[], where + * N = 1 << pow2. The amount of storage needed is (1 + 2 * N) + */ + int SK_SPI SK_WARN_UNUSED_RESULT chopIntoQuadsPOW2(SkPoint pts[], int pow2) const; + + float findMidTangent() const; + bool findXExtrema(SkScalar* t) const; + bool findYExtrema(SkScalar* t) const; + bool chopAtXExtrema(SkConic dst[2]) const; + bool chopAtYExtrema(SkConic dst[2]) const; + + void computeTightBounds(SkRect* bounds) const; + void computeFastBounds(SkRect* bounds) const; + + /** Find the parameter value where the conic takes on its maximum curvature. + * + * @param t output scalar for max curvature. Will be unchanged if + * max curvature outside 0..1 range. + * + * @return true if max curvature found inside 0..1 range, false otherwise + */ +// bool findMaxCurvature(SkScalar* t) const; // unimplemented + + static SkScalar TransformW(const SkPoint[3], SkScalar w, const SkMatrix&); + + enum { + kMaxConicsForArc = 5 + }; + static int BuildUnitArc(const SkVector& start, const SkVector& stop, SkRotationDirection, + const SkMatrix*, SkConic conics[kMaxConicsForArc]); +}; + +// inline helpers are contained in a namespace to avoid external leakage to fragile SkVx members +namespace { // NOLINT(google-build-namespaces) + +/** + * use for : eval(t) == A * t^2 + B * t + C + */ +struct SkQuadCoeff { + SkQuadCoeff() {} + + SkQuadCoeff(const skvx::float2& A, const skvx::float2& B, const skvx::float2& C) + : fA(A) + , fB(B) + , fC(C) + { + } + + SkQuadCoeff(const SkPoint src[3]) { + fC = from_point(src[0]); + auto P1 = from_point(src[1]); + auto P2 = from_point(src[2]); + fB = times_2(P1 - fC); + fA = P2 - times_2(P1) + fC; + } + + skvx::float2 eval(const skvx::float2& tt) { + return (fA * tt + fB) * tt + fC; + } + + skvx::float2 fA; + skvx::float2 fB; + skvx::float2 fC; +}; + +struct SkConicCoeff { + SkConicCoeff(const SkConic& conic) { + skvx::float2 p0 = from_point(conic.fPts[0]); + skvx::float2 p1 = from_point(conic.fPts[1]); + skvx::float2 p2 = from_point(conic.fPts[2]); + skvx::float2 ww(conic.fW); + + auto p1w = p1 * ww; + fNumer.fC = p0; + fNumer.fA = p2 - times_2(p1w) + p0; + fNumer.fB = times_2(p1w - p0); + + fDenom.fC = 1; + fDenom.fB = times_2(ww - fDenom.fC); + fDenom.fA = 0 - fDenom.fB; + } + + skvx::float2 eval(SkScalar t) { + skvx::float2 tt(t); + skvx::float2 numer = fNumer.eval(tt); + skvx::float2 denom = fDenom.eval(tt); + return numer / denom; + } + + SkQuadCoeff fNumer; + SkQuadCoeff fDenom; +}; + +struct SkCubicCoeff { + SkCubicCoeff(const SkPoint src[4]) { + skvx::float2 P0 = from_point(src[0]); + skvx::float2 P1 = from_point(src[1]); + skvx::float2 P2 = from_point(src[2]); + skvx::float2 P3 = from_point(src[3]); + skvx::float2 three(3); + fA = P3 + three * (P1 - P2) - P0; + fB = three * (P2 - times_2(P1) + P0); + fC = three * (P1 - P0); + fD = P0; + } + + skvx::float2 eval(const skvx::float2& t) { + return ((fA * t + fB) * t + fC) * t + fD; + } + + skvx::float2 fA; + skvx::float2 fB; + skvx::float2 fC; + skvx::float2 fD; +}; + +} // namespace + +#include "include/private/base/SkTemplates.h" + +/** + * Help class to allocate storage for approximating a conic with N quads. + */ +class SkAutoConicToQuads { +public: + SkAutoConicToQuads() : fQuadCount(0) {} + + /** + * Given a conic and a tolerance, return the array of points for the + * approximating quad(s). Call countQuads() to know the number of quads + * represented in these points. + * + * The quads are allocated to share end-points. e.g. if there are 4 quads, + * there will be 9 points allocated as follows + * quad[0] == pts[0..2] + * quad[1] == pts[2..4] + * quad[2] == pts[4..6] + * quad[3] == pts[6..8] + */ + const SkPoint* computeQuads(const SkConic& conic, SkScalar tol) { + int pow2 = conic.computeQuadPOW2(tol); + fQuadCount = 1 << pow2; + SkPoint* pts = fStorage.reset(1 + 2 * fQuadCount); + fQuadCount = conic.chopIntoQuadsPOW2(pts, pow2); + return pts; + } + + const SkPoint* computeQuads(const SkPoint pts[3], SkScalar weight, + SkScalar tol) { + SkConic conic; + conic.set(pts, weight); + return computeQuads(conic, tol); + } + + int countQuads() const { return fQuadCount; } + +private: + enum { + kQuadCount = 8, // should handle most conics + kPointCount = 1 + 2 * kQuadCount, + }; + skia_private::AutoSTMalloc fStorage; + int fQuadCount; // #quads for current usage +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkGlobalInitialization_core.cpp b/gfx/skia/skia/src/core/SkGlobalInitialization_core.cpp new file mode 100644 index 0000000000..c189a32cb6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGlobalInitialization_core.cpp @@ -0,0 +1,18 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFlattenable.h" +#include "include/private/base/SkOnce.h" + +void SkFlattenable::RegisterFlattenablesIfNeeded() { + static SkOnce once; + once([]{ + SkFlattenable::PrivateInitializer::InitEffects(); + SkFlattenable::PrivateInitializer::InitImageFilters(); + SkFlattenable::Finalize(); + }); +} diff --git a/gfx/skia/skia/src/core/SkGlyph.cpp b/gfx/skia/skia/src/core/SkGlyph.cpp new file mode 100644 index 0000000000..56f481e312 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGlyph.cpp @@ -0,0 +1,700 @@ +/* + * Copyright 2018 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkGlyph.h" + +#include "include/core/SkCanvas.h" +#include "include/core/SkData.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkPicture.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkWriteBuffer.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/text/StrikeForGPU.h" + +#include +#include +#include +#include + +using namespace skia_private; +using namespace skglyph; +using namespace sktext; + +//-- SkGlyph --------------------------------------------------------------------------------------- +std::optional SkGlyph::MakeFromBuffer(SkReadBuffer& buffer) { + SkASSERT(buffer.isValid()); + const SkPackedGlyphID packedID{buffer.readUInt()}; + const SkVector advance = buffer.readPoint(); + const uint32_t dimensions = buffer.readUInt(); + const uint32_t leftTop = buffer.readUInt(); + const SkMask::Format format = SkTo(buffer.readUInt()); + + if (!buffer.validate(SkMask::IsValidFormat(format))) { + return std::nullopt; + } + + SkGlyph glyph{packedID}; + glyph.fAdvanceX = advance.x(); + glyph.fAdvanceY = advance.y(); + glyph.fWidth = dimensions >> 16; + glyph.fHeight = dimensions & 0xffffu; + glyph.fLeft = leftTop >> 16; + glyph.fTop = leftTop & 0xffffu; + glyph.fMaskFormat = format; + SkDEBUGCODE(glyph.fAdvancesBoundsFormatAndInitialPathDone = true;) + return std::move(glyph); +} + +SkGlyph::SkGlyph(const SkGlyph&) = default; +SkGlyph& SkGlyph::operator=(const SkGlyph&) = default; +SkGlyph::SkGlyph(SkGlyph&&) = default; +SkGlyph& SkGlyph::operator=(SkGlyph&&) = default; +SkGlyph::~SkGlyph() = default; + +SkMask SkGlyph::mask() const { + SkMask mask; + mask.fImage = (uint8_t*)fImage; + mask.fBounds.setXYWH(fLeft, fTop, fWidth, fHeight); + mask.fRowBytes = this->rowBytes(); + mask.fFormat = fMaskFormat; + return mask; +} + +SkMask SkGlyph::mask(SkPoint position) const { + SkASSERT(SkScalarIsInt(position.x()) && SkScalarIsInt(position.y())); + SkMask answer = this->mask(); + answer.fBounds.offset(SkScalarFloorToInt(position.x()), SkScalarFloorToInt(position.y())); + return answer; +} + +void SkGlyph::zeroMetrics() { + fAdvanceX = 0; + fAdvanceY = 0; + fWidth = 0; + fHeight = 0; + fTop = 0; + fLeft = 0; +} + +static size_t bits_to_bytes(size_t bits) { + return (bits + 7) >> 3; +} + +static size_t format_alignment(SkMask::Format format) { + switch (format) { + case SkMask::kBW_Format: + case SkMask::kA8_Format: + case SkMask::k3D_Format: + case SkMask::kSDF_Format: + return alignof(uint8_t); + case SkMask::kARGB32_Format: + return alignof(uint32_t); + case SkMask::kLCD16_Format: + return alignof(uint16_t); + default: + SK_ABORT("Unknown mask format."); + break; + } + return 0; +} + +static size_t format_rowbytes(int width, SkMask::Format format) { + return format == SkMask::kBW_Format ? bits_to_bytes(width) + : width * format_alignment(format); +} + +size_t SkGlyph::formatAlignment() const { + return format_alignment(this->maskFormat()); +} + +size_t SkGlyph::allocImage(SkArenaAlloc* alloc) { + SkASSERT(!this->isEmpty()); + auto size = this->imageSize(); + fImage = alloc->makeBytesAlignedTo(size, this->formatAlignment()); + + return size; +} + +bool SkGlyph::setImage(SkArenaAlloc* alloc, SkScalerContext* scalerContext) { + if (!this->setImageHasBeenCalled()) { + // It used to be that getImage() could change the fMaskFormat. Extra checking to make + // sure there are no regressions. + SkDEBUGCODE(SkMask::Format oldFormat = this->maskFormat()); + this->allocImage(alloc); + scalerContext->getImage(*this); + SkASSERT(oldFormat == this->maskFormat()); + return true; + } + return false; +} + +bool SkGlyph::setImage(SkArenaAlloc* alloc, const void* image) { + if (!this->setImageHasBeenCalled()) { + this->allocImage(alloc); + memcpy(fImage, image, this->imageSize()); + return true; + } + return false; +} + +size_t SkGlyph::setMetricsAndImage(SkArenaAlloc* alloc, const SkGlyph& from) { + // Since the code no longer tries to find replacement glyphs, the image should always be + // nullptr. + SkASSERT(fImage == nullptr || from.fImage == nullptr); + + // TODO(herb): remove "if" when we are sure there are no colliding glyphs. + if (fImage == nullptr) { + fAdvanceX = from.fAdvanceX; + fAdvanceY = from.fAdvanceY; + fWidth = from.fWidth; + fHeight = from.fHeight; + fTop = from.fTop; + fLeft = from.fLeft; + fScalerContextBits = from.fScalerContextBits; + fMaskFormat = from.fMaskFormat; + + // From glyph may not have an image because the glyph is too large. + if (from.fImage != nullptr && this->setImage(alloc, from.image())) { + return this->imageSize(); + } + + SkDEBUGCODE(fAdvancesBoundsFormatAndInitialPathDone = from.fAdvancesBoundsFormatAndInitialPathDone;) + } + return 0; +} + +size_t SkGlyph::rowBytes() const { + return format_rowbytes(fWidth, fMaskFormat); +} + +size_t SkGlyph::rowBytesUsingFormat(SkMask::Format format) const { + return format_rowbytes(fWidth, format); +} + +size_t SkGlyph::imageSize() const { + if (this->isEmpty() || this->imageTooLarge()) { return 0; } + + size_t size = this->rowBytes() * fHeight; + + if (fMaskFormat == SkMask::k3D_Format) { + size *= 3; + } + + return size; +} + +void SkGlyph::installPath(SkArenaAlloc* alloc, const SkPath* path, bool hairline) { + SkASSERT(fPathData == nullptr); + SkASSERT(!this->setPathHasBeenCalled()); + fPathData = alloc->make(); + if (path != nullptr) { + fPathData->fPath = *path; + fPathData->fPath.updateBoundsCache(); + fPathData->fPath.getGenerationID(); + fPathData->fHasPath = true; + fPathData->fHairline = hairline; + } +} + +bool SkGlyph::setPath(SkArenaAlloc* alloc, SkScalerContext* scalerContext) { + if (!this->setPathHasBeenCalled()) { + scalerContext->getPath(*this, alloc); + SkASSERT(this->setPathHasBeenCalled()); + return this->path() != nullptr; + } + + return false; +} + +bool SkGlyph::setPath(SkArenaAlloc* alloc, const SkPath* path, bool hairline) { + if (!this->setPathHasBeenCalled()) { + this->installPath(alloc, path, hairline); + return this->path() != nullptr; + } + return false; +} + +const SkPath* SkGlyph::path() const { + // setPath must have been called previously. + SkASSERT(this->setPathHasBeenCalled()); + if (fPathData->fHasPath) { + return &fPathData->fPath; + } + return nullptr; +} + +bool SkGlyph::pathIsHairline() const { + // setPath must have been called previously. + SkASSERT(this->setPathHasBeenCalled()); + return fPathData->fHairline; +} + +void SkGlyph::installDrawable(SkArenaAlloc* alloc, sk_sp drawable) { + SkASSERT(fDrawableData == nullptr); + SkASSERT(!this->setDrawableHasBeenCalled()); + fDrawableData = alloc->make(); + if (drawable != nullptr) { + fDrawableData->fDrawable = std::move(drawable); + fDrawableData->fDrawable->getGenerationID(); + fDrawableData->fHasDrawable = true; + } +} + +bool SkGlyph::setDrawable(SkArenaAlloc* alloc, SkScalerContext* scalerContext) { + if (!this->setDrawableHasBeenCalled()) { + sk_sp drawable = scalerContext->getDrawable(*this); + this->installDrawable(alloc, std::move(drawable)); + return this->drawable() != nullptr; + } + return false; +} + +bool SkGlyph::setDrawable(SkArenaAlloc* alloc, sk_sp drawable) { + if (!this->setDrawableHasBeenCalled()) { + this->installDrawable(alloc, std::move(drawable)); + return this->drawable() != nullptr; + } + return false; +} + +SkDrawable* SkGlyph::drawable() const { + // setDrawable must have been called previously. + SkASSERT(this->setDrawableHasBeenCalled()); + if (fDrawableData->fHasDrawable) { + return fDrawableData->fDrawable.get(); + } + return nullptr; +} + +void SkGlyph::flattenMetrics(SkWriteBuffer& buffer) const { + buffer.writeUInt(fID.value()); + buffer.writePoint({fAdvanceX, fAdvanceY}); + buffer.writeUInt(fWidth << 16 | fHeight); + // Note: << has undefined behavior for negative values, so convert everything to the bit + // values of uint16_t. Using the cast keeps the signed values fLeft and fTop from sign + // extending. + const uint32_t left = static_cast(fLeft); + const uint32_t top = static_cast(fTop); + buffer.writeUInt(left << 16 | top); + buffer.writeUInt(SkTo(fMaskFormat)); +} + +void SkGlyph::flattenImage(SkWriteBuffer& buffer) const { + SkASSERT(this->setImageHasBeenCalled()); + + // If the glyph is empty or too big, then no image data is sent. + if (!this->isEmpty() && SkGlyphDigest::FitsInAtlas(*this)) { + buffer.writeByteArray(this->image(), this->imageSize()); + } +} + +size_t SkGlyph::addImageFromBuffer(SkReadBuffer& buffer, SkArenaAlloc* alloc) { + SkASSERT(buffer.isValid()); + + // If the glyph is empty or too big, then no image data is received. + if (this->isEmpty() || !SkGlyphDigest::FitsInAtlas(*this)) { + return 0; + } + + size_t memoryIncrease = 0; + + void* imageData = alloc->makeBytesAlignedTo(this->imageSize(), this->formatAlignment()); + buffer.readByteArray(imageData, this->imageSize()); + if (buffer.isValid()) { + this->installImage(imageData); + memoryIncrease += this->imageSize(); + } + + return memoryIncrease; +} + +void SkGlyph::flattenPath(SkWriteBuffer& buffer) const { + SkASSERT(this->setPathHasBeenCalled()); + + const bool hasPath = this->path() != nullptr; + buffer.writeBool(hasPath); + if (hasPath) { + buffer.writeBool(this->pathIsHairline()); + buffer.writePath(*this->path()); + } +} + +size_t SkGlyph::addPathFromBuffer(SkReadBuffer& buffer, SkArenaAlloc* alloc) { + SkASSERT(buffer.isValid()); + + size_t memoryIncrease = 0; + const bool hasPath = buffer.readBool(); + // Check if the buffer is invalid, so as to not make a logical decision on invalid data. + if (!buffer.isValid()) { + return 0; + } + if (hasPath) { + const bool pathIsHairline = buffer.readBool(); + SkPath path; + buffer.readPath(&path); + if (buffer.isValid()) { + if (this->setPath(alloc, &path, pathIsHairline)) { + memoryIncrease += path.approximateBytesUsed(); + } + } + } else { + this->setPath(alloc, nullptr, false); + } + + return memoryIncrease; +} + +void SkGlyph::flattenDrawable(SkWriteBuffer& buffer) const { + SkASSERT(this->setDrawableHasBeenCalled()); + + if (this->isEmpty() || this->drawable() == nullptr) { + buffer.writeByteArray(nullptr, 0); + return; + } + + sk_sp picture{this->drawable()->newPictureSnapshot()}; + sk_sp data = picture->serialize(); + + // If the picture is too big, or there is no picture, then drop by sending an empty byte array. + if (!SkTFitsIn(data->size()) || data->size() == 0) { + buffer.writeByteArray(nullptr, 0); + return; + } + + buffer.writeByteArray(data->data(), data->size()); +} + +size_t SkGlyph::addDrawableFromBuffer(SkReadBuffer& buffer, SkArenaAlloc* alloc) { + SkASSERT(buffer.isValid()); + + // Class to turn the drawable into a picture to serialize. + class PictureBackedGlyphDrawable final : public SkDrawable { + public: + PictureBackedGlyphDrawable(sk_sp self) : fSelf(std::move(self)) {} + private: + sk_sp fSelf; + SkRect onGetBounds() override { return fSelf->cullRect(); } + size_t onApproximateBytesUsed() override { + return sizeof(PictureBackedGlyphDrawable) + fSelf->approximateBytesUsed(); + } + void onDraw(SkCanvas* canvas) override { canvas->drawPicture(fSelf); } + }; + + size_t memoryIncrease = 0; + + sk_sp pictureData = buffer.readByteArrayAsData(); + if (!buffer.isValid()) { + return 0; + } + + // If the picture is too big, or there is no picture is indicated by an empty byte array. + if (pictureData->size() > 0) { + sk_sp picture = SkPicture::MakeFromData(pictureData.get()); + if (!buffer.validate(picture != nullptr)) { + return 0; + } + sk_sp drawable = sk_make_sp(std::move(picture)); + if (this->setDrawable(alloc, std::move(drawable))) { + memoryIncrease += this->drawable()->approximateBytesUsed(); + } + } else { + this->setDrawable(alloc, sk_sp(nullptr)); + } + + return memoryIncrease; +} + +static std::tuple calculate_path_gap( + SkScalar topOffset, SkScalar bottomOffset, const SkPath& path) { + + // Left and Right of an ever expanding gap around the path. + SkScalar left = SK_ScalarMax, + right = SK_ScalarMin; + auto expandGap = [&left, &right](SkScalar v) { + left = std::min(left, v); + right = std::max(right, v); + }; + + // Handle all the different verbs for the path. + SkPoint pts[4]; + auto addLine = [&expandGap, &pts](SkScalar offset) { + SkScalar t = sk_ieee_float_divide(offset - pts[0].fY, pts[1].fY - pts[0].fY); + if (0 <= t && t < 1) { // this handles divide by zero above + expandGap(pts[0].fX + t * (pts[1].fX - pts[0].fX)); + } + }; + + auto addQuad = [&expandGap, &pts](SkScalar offset) { + SkDQuad quad; + quad.set(pts); + double roots[2]; + int count = quad.horizontalIntersect(offset, roots); + while (--count >= 0) { + expandGap(quad.ptAtT(roots[count]).asSkPoint().fX); + } + }; + + auto addCubic = [&expandGap, &pts](SkScalar offset) { + SkDCubic cubic; + cubic.set(pts); + double roots[3]; + int count = cubic.horizontalIntersect(offset, roots); + while (--count >= 0) { + expandGap(cubic.ptAtT(roots[count]).asSkPoint().fX); + } + }; + + // Handle when a verb's points are in the gap between top and bottom. + auto addPts = [&expandGap, &pts, topOffset, bottomOffset](int ptCount) { + for (int i = 0; i < ptCount; ++i) { + if (topOffset < pts[i].fY && pts[i].fY < bottomOffset) { + expandGap(pts[i].fX); + } + } + }; + + SkPath::Iter iter(path, false); + SkPath::Verb verb; + while (SkPath::kDone_Verb != (verb = iter.next(pts))) { + switch (verb) { + case SkPath::kMove_Verb: { + break; + } + case SkPath::kLine_Verb: { + addLine(topOffset); + addLine(bottomOffset); + addPts(2); + break; + } + case SkPath::kQuad_Verb: { + SkScalar quadTop = std::min(std::min(pts[0].fY, pts[1].fY), pts[2].fY); + if (bottomOffset < quadTop) { break; } + SkScalar quadBottom = std::max(std::max(pts[0].fY, pts[1].fY), pts[2].fY); + if (topOffset > quadBottom) { break; } + addQuad(topOffset); + addQuad(bottomOffset); + addPts(3); + break; + } + case SkPath::kConic_Verb: { + SkASSERT(0); // no support for text composed of conics + break; + } + case SkPath::kCubic_Verb: { + SkScalar quadTop = + std::min(std::min(std::min(pts[0].fY, pts[1].fY), pts[2].fY), pts[3].fY); + if (bottomOffset < quadTop) { break; } + SkScalar quadBottom = + std::max(std::max(std::max(pts[0].fY, pts[1].fY), pts[2].fY), pts[3].fY); + if (topOffset > quadBottom) { break; } + addCubic(topOffset); + addCubic(bottomOffset); + addPts(4); + break; + } + case SkPath::kClose_Verb: { + break; + } + default: { + SkASSERT(0); + break; + } + } + } + + return std::tie(left, right); +} + +void SkGlyph::ensureIntercepts(const SkScalar* bounds, SkScalar scale, SkScalar xPos, + SkScalar* array, int* count, SkArenaAlloc* alloc) { + + auto offsetResults = [scale, xPos]( + const SkGlyph::Intercept* intercept,SkScalar* array, int* count) { + if (array) { + array += *count; + for (int index = 0; index < 2; index++) { + *array++ = intercept->fInterval[index] * scale + xPos; + } + } + *count += 2; + }; + + const SkGlyph::Intercept* match = + [this](const SkScalar bounds[2]) -> const SkGlyph::Intercept* { + if (!fPathData) { + return nullptr; + } + const SkGlyph::Intercept* intercept = fPathData->fIntercept; + while (intercept) { + if (bounds[0] == intercept->fBounds[0] && bounds[1] == intercept->fBounds[1]) { + return intercept; + } + intercept = intercept->fNext; + } + return nullptr; + }(bounds); + + if (match) { + if (match->fInterval[0] < match->fInterval[1]) { + offsetResults(match, array, count); + } + return; + } + + SkGlyph::Intercept* intercept = alloc->make(); + intercept->fNext = fPathData->fIntercept; + intercept->fBounds[0] = bounds[0]; + intercept->fBounds[1] = bounds[1]; + intercept->fInterval[0] = SK_ScalarMax; + intercept->fInterval[1] = SK_ScalarMin; + fPathData->fIntercept = intercept; + const SkPath* path = &(fPathData->fPath); + const SkRect& pathBounds = path->getBounds(); + if (pathBounds.fBottom < bounds[0] || bounds[1] < pathBounds.fTop) { + return; + } + + std::tie(intercept->fInterval[0], intercept->fInterval[1]) + = calculate_path_gap(bounds[0], bounds[1], *path); + + if (intercept->fInterval[0] >= intercept->fInterval[1]) { + intercept->fInterval[0] = SK_ScalarMax; + intercept->fInterval[1] = SK_ScalarMin; + return; + } + offsetResults(intercept, array, count); +} + +namespace { +uint32_t init_actions(const SkGlyph& glyph) { + constexpr uint32_t kAllUnset = 0; + constexpr uint32_t kDrop = SkTo(GlyphAction::kDrop); + constexpr uint32_t kAllDrop = + kDrop << kDirectMask | + kDrop << kDirectMaskCPU | + kDrop << kMask | + kDrop << kSDFT | + kDrop << kPath | + kDrop << kDrawable; + return glyph.isEmpty() ? kAllDrop : kAllUnset; +} +} // namespace + +// -- SkGlyphDigest -------------------------------------------------------------------------------- +SkGlyphDigest::SkGlyphDigest(size_t index, const SkGlyph& glyph) + : fPackedID{SkTo(glyph.getPackedID().value())} + , fIndex{SkTo(index)} + , fIsEmpty(glyph.isEmpty()) + , fFormat(glyph.maskFormat()) + , fActions{init_actions(glyph)} + , fLeft{SkTo(glyph.left())} + , fTop{SkTo(glyph.top())} + , fWidth{SkTo(glyph.width())} + , fHeight{SkTo(glyph.height())} {} + +void SkGlyphDigest::setActionFor(skglyph::ActionType actionType, + SkGlyph* glyph, + StrikeForGPU* strike) { + // We don't have to do any more if the glyph is marked as kDrop because it was isEmpty(). + if (this->actionFor(actionType) == GlyphAction::kUnset) { + GlyphAction action = GlyphAction::kReject; + switch (actionType) { + case kDirectMask: { + if (this->fitsInAtlasDirect()) { + action = GlyphAction::kAccept; + } + break; + } + case kDirectMaskCPU: { + if (strike->prepareForImage(glyph)) { + action = GlyphAction::kAccept; + } + break; + } + case kMask: { + if (this->fitsInAtlasInterpolated()) { + action = GlyphAction::kAccept; + } + break; + } + case kSDFT: { + if (this->fitsInAtlasDirect() && + this->maskFormat() == SkMask::Format::kSDF_Format) { + action = GlyphAction::kAccept; + } + break; + } + case kPath: { + if (strike->prepareForPath(glyph)) { + action = GlyphAction::kAccept; + } + break; + } + case kDrawable: { + if (strike->prepareForDrawable(glyph)) { + action = GlyphAction::kAccept; + } + break; + } + } + this->setAction(actionType, action); + } +} + +bool SkGlyphDigest::FitsInAtlas(const SkGlyph& glyph) { + return glyph.maxDimension() <= kSkSideTooBigForAtlas; +} + +// -- SkGlyphPositionRoundingSpec ------------------------------------------------------------------ +SkVector SkGlyphPositionRoundingSpec::HalfAxisSampleFreq( + bool isSubpixel, SkAxisAlignment axisAlignment) { + if (!isSubpixel) { + return {SK_ScalarHalf, SK_ScalarHalf}; + } else { + switch (axisAlignment) { + case SkAxisAlignment::kX: + return {SkPackedGlyphID::kSubpixelRound, SK_ScalarHalf}; + case SkAxisAlignment::kY: + return {SK_ScalarHalf, SkPackedGlyphID::kSubpixelRound}; + case SkAxisAlignment::kNone: + return {SkPackedGlyphID::kSubpixelRound, SkPackedGlyphID::kSubpixelRound}; + } + } + + // Some compilers need this. + return {0, 0}; +} + +SkIPoint SkGlyphPositionRoundingSpec::IgnorePositionMask( + bool isSubpixel, SkAxisAlignment axisAlignment) { + return SkIPoint::Make((!isSubpixel || axisAlignment == SkAxisAlignment::kY) ? 0 : ~0, + (!isSubpixel || axisAlignment == SkAxisAlignment::kX) ? 0 : ~0); +} + +SkIPoint SkGlyphPositionRoundingSpec::IgnorePositionFieldMask(bool isSubpixel, + SkAxisAlignment axisAlignment) { + SkIPoint ignoreMask = IgnorePositionMask(isSubpixel, axisAlignment); + SkIPoint answer{ignoreMask.x() & SkPackedGlyphID::kXYFieldMask.x(), + ignoreMask.y() & SkPackedGlyphID::kXYFieldMask.y()}; + return answer; +} + +SkGlyphPositionRoundingSpec::SkGlyphPositionRoundingSpec( + bool isSubpixel, SkAxisAlignment axisAlignment) + : halfAxisSampleFreq{HalfAxisSampleFreq(isSubpixel, axisAlignment)} + , ignorePositionMask{IgnorePositionMask(isSubpixel, axisAlignment)} + , ignorePositionFieldMask {IgnorePositionFieldMask(isSubpixel, axisAlignment)} {} diff --git a/gfx/skia/skia/src/core/SkGlyph.h b/gfx/skia/skia/src/core/SkGlyph.h new file mode 100644 index 0000000000..73ce682016 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGlyph.h @@ -0,0 +1,639 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGlyph_DEFINED +#define SkGlyph_DEFINED + +#include "include/core/SkDrawable.h" +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/SkChecksum.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkVx.h" +#include "src/core/SkMask.h" + +#include +#include +#include +#include +#include +#include + +class SkArenaAlloc; +class SkGlyph; +class SkReadBuffer; +class SkScalerContext; +class SkWriteBuffer; +namespace sktext { +class StrikeForGPU; +} // namespace sktext + +// -- SkPackedGlyphID ------------------------------------------------------------------------------ +// A combination of SkGlyphID and sub-pixel position information. +struct SkPackedGlyphID { + inline static constexpr uint32_t kImpossibleID = ~0u; + enum { + // Lengths + kGlyphIDLen = 16u, + kSubPixelPosLen = 2u, + + // Bit positions + kSubPixelX = 0u, + kGlyphID = kSubPixelPosLen, + kSubPixelY = kGlyphIDLen + kSubPixelPosLen, + kEndData = kGlyphIDLen + 2 * kSubPixelPosLen, + + // Masks + kGlyphIDMask = (1u << kGlyphIDLen) - 1, + kSubPixelPosMask = (1u << kSubPixelPosLen) - 1, + kMaskAll = (1u << kEndData) - 1, + + // Location of sub pixel info in a fixed pointer number. + kFixedPointBinaryPointPos = 16u, + kFixedPointSubPixelPosBits = kFixedPointBinaryPointPos - kSubPixelPosLen, + }; + + inline static const constexpr SkScalar kSubpixelRound = + 1.f / (1u << (SkPackedGlyphID::kSubPixelPosLen + 1)); + + inline static const constexpr SkIPoint kXYFieldMask{kSubPixelPosMask << kSubPixelX, + kSubPixelPosMask << kSubPixelY}; + + struct Hash { + uint32_t operator() (SkPackedGlyphID packedID) const { + return packedID.hash(); + } + }; + + constexpr explicit SkPackedGlyphID(SkGlyphID glyphID) + : fID{(uint32_t)glyphID << kGlyphID} { } + + constexpr SkPackedGlyphID(SkGlyphID glyphID, SkFixed x, SkFixed y) + : fID {PackIDXY(glyphID, x, y)} { } + + constexpr SkPackedGlyphID(SkGlyphID glyphID, uint32_t x, uint32_t y) + : fID {PackIDSubXSubY(glyphID, x, y)} { } + + SkPackedGlyphID(SkGlyphID glyphID, SkPoint pt, SkIPoint mask) + : fID{PackIDSkPoint(glyphID, pt, mask)} { } + + constexpr explicit SkPackedGlyphID(uint32_t v) : fID{v & kMaskAll} { } + constexpr SkPackedGlyphID() : fID{kImpossibleID} {} + + bool operator==(const SkPackedGlyphID& that) const { + return fID == that.fID; + } + bool operator!=(const SkPackedGlyphID& that) const { + return !(*this == that); + } + bool operator<(SkPackedGlyphID that) const { + return this->fID < that.fID; + } + + SkGlyphID glyphID() const { + return (fID >> kGlyphID) & kGlyphIDMask; + } + + uint32_t value() const { + return fID; + } + + SkFixed getSubXFixed() const { + return this->subToFixed(kSubPixelX); + } + + SkFixed getSubYFixed() const { + return this->subToFixed(kSubPixelY); + } + + uint32_t hash() const { + return SkChecksum::CheapMix(fID); + } + + SkString dump() const { + SkString str; + str.appendf("glyphID: %d, x: %d, y:%d", glyphID(), getSubXFixed(), getSubYFixed()); + return str; + } + + SkString shortDump() const { + SkString str; + str.appendf("0x%x|%1d|%1d", this->glyphID(), + this->subPixelField(kSubPixelX), + this->subPixelField(kSubPixelY)); + return str; + } + +private: + static constexpr uint32_t PackIDSubXSubY(SkGlyphID glyphID, uint32_t x, uint32_t y) { + SkASSERT(x < (1u << kSubPixelPosLen)); + SkASSERT(y < (1u << kSubPixelPosLen)); + + return (x << kSubPixelX) | (y << kSubPixelY) | (glyphID << kGlyphID); + } + + // Assumptions: pt is properly rounded. mask is set for the x or y fields. + // + // A sub-pixel field is a number on the interval [2^kSubPixel, 2^(kSubPixel + kSubPixelPosLen)). + // Where kSubPixel is either kSubPixelX or kSubPixelY. Given a number x on [0, 1) we can + // generate a sub-pixel field using: + // sub-pixel-field = x * 2^(kSubPixel + kSubPixelPosLen) + // + // We can generate the integer sub-pixel field by &-ing the integer part of sub-filed with the + // sub-pixel field mask. + // int-sub-pixel-field = int(sub-pixel-field) & (kSubPixelPosMask << kSubPixel) + // + // The last trick is to extend the range from [0, 1) to [0, 2). The extend range is + // necessary because the modulo 1 calculation (pt - floor(pt)) generates numbers on [-1, 1). + // This does not round (floor) properly when converting to integer. Adding one to the range + // causes truncation and floor to be the same. Coincidentally, masking to produce the field also + // removes the +1. + static uint32_t PackIDSkPoint(SkGlyphID glyphID, SkPoint pt, SkIPoint mask) { + #if 0 + // TODO: why does this code not work on GCC 8.3 x86 Debug builds? + using namespace skvx; + using XY = Vec<2, float>; + using SubXY = Vec<2, int>; + + const XY magic = {1.f * (1u << (kSubPixelPosLen + kSubPixelX)), + 1.f * (1u << (kSubPixelPosLen + kSubPixelY))}; + XY pos{pt.x(), pt.y()}; + XY subPos = (pos - floor(pos)) + 1.0f; + SubXY sub = cast(subPos * magic) & SubXY{mask.x(), mask.y()}; + #else + const float magicX = 1.f * (1u << (kSubPixelPosLen + kSubPixelX)), + magicY = 1.f * (1u << (kSubPixelPosLen + kSubPixelY)); + + float x = pt.x(), + y = pt.y(); + x = (x - floorf(x)) + 1.0f; + y = (y - floorf(y)) + 1.0f; + int sub[] = { + (int)(x * magicX) & mask.x(), + (int)(y * magicY) & mask.y(), + }; + #endif + + SkASSERT(sub[0] / (1u << kSubPixelX) < (1u << kSubPixelPosLen)); + SkASSERT(sub[1] / (1u << kSubPixelY) < (1u << kSubPixelPosLen)); + return (glyphID << kGlyphID) | sub[0] | sub[1]; + } + + static constexpr uint32_t PackIDXY(SkGlyphID glyphID, SkFixed x, SkFixed y) { + return PackIDSubXSubY(glyphID, FixedToSub(x), FixedToSub(y)); + } + + static constexpr uint32_t FixedToSub(SkFixed n) { + return ((uint32_t)n >> kFixedPointSubPixelPosBits) & kSubPixelPosMask; + } + + constexpr uint32_t subPixelField(uint32_t subPixelPosBit) const { + return (fID >> subPixelPosBit) & kSubPixelPosMask; + } + + constexpr SkFixed subToFixed(uint32_t subPixelPosBit) const { + uint32_t subPixelPosition = this->subPixelField(subPixelPosBit); + return subPixelPosition << kFixedPointSubPixelPosBits; + } + + uint32_t fID; +}; + +// -- SkAxisAlignment ------------------------------------------------------------------------------ +// SkAxisAlignment specifies the x component of a glyph's position is rounded when kX, and the y +// component is rounded when kY. If kNone then neither are rounded. +enum class SkAxisAlignment : uint32_t { + kNone, + kX, + kY, +}; + +// round and ignorePositionMask are used to calculate the subpixel position of a glyph. +// The per component (x or y) calculation is: +// +// subpixelOffset = (floor((viewportPosition + rounding) & mask) >> 14) & 3 +// +// where mask is either 0 or ~0, and rounding is either +// 1/2 for non-subpixel or 1/8 for subpixel. +struct SkGlyphPositionRoundingSpec { + SkGlyphPositionRoundingSpec(bool isSubpixel, SkAxisAlignment axisAlignment); + const SkVector halfAxisSampleFreq; + const SkIPoint ignorePositionMask; + const SkIPoint ignorePositionFieldMask; + +private: + static SkVector HalfAxisSampleFreq(bool isSubpixel, SkAxisAlignment axisAlignment); + static SkIPoint IgnorePositionMask(bool isSubpixel, SkAxisAlignment axisAlignment); + static SkIPoint IgnorePositionFieldMask(bool isSubpixel, SkAxisAlignment axisAlignment); +}; + +class SkGlyphRect; +namespace skglyph { +SkGlyphRect rect_union(SkGlyphRect, SkGlyphRect); +SkGlyphRect rect_intersection(SkGlyphRect, SkGlyphRect); +} // namespace skglyph + +// SkGlyphRect encodes rectangles with coordinates using SkScalar. It is specialized for +// rectangle union and intersection operations. +class SkGlyphRect { +public: + SkGlyphRect() = default; + SkGlyphRect(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom) + : fRect{-left, -top, right, bottom} { } + bool empty() const { + return -fRect[0] >= fRect[2] || -fRect[1] >= fRect[3]; + } + SkRect rect() const { + return SkRect::MakeLTRB(-fRect[0], -fRect[1], fRect[2], fRect[3]); + } + SkGlyphRect offset(SkScalar x, SkScalar y) const { + return SkGlyphRect{fRect + Storage{-x, -y, x, y}}; + } + SkGlyphRect offset(SkPoint pt) const { + return this->offset(pt.x(), pt.y()); + } + SkGlyphRect scaleAndOffset(SkScalar scale, SkPoint offset) const { + auto [x, y] = offset; + return fRect * scale + Storage{-x, -y, x, y}; + } + SkGlyphRect inset(SkScalar dx, SkScalar dy) const { + return fRect - Storage{dx, dy, dx, dy}; + } + SkPoint leftTop() const { return -this->negLeftTop(); } + SkPoint rightBottom() const { return {fRect[2], fRect[3]}; } + SkPoint widthHeight() const { return this->rightBottom() + negLeftTop(); } + friend SkGlyphRect skglyph::rect_union(SkGlyphRect, SkGlyphRect); + friend SkGlyphRect skglyph::rect_intersection(SkGlyphRect, SkGlyphRect); + +private: + SkPoint negLeftTop() const { return {fRect[0], fRect[1]}; } + using Storage = skvx::Vec<4, SkScalar>; + SkGlyphRect(Storage rect) : fRect{rect} { } + Storage fRect; +}; + +namespace skglyph { +inline SkGlyphRect empty_rect() { + constexpr SkScalar max = std::numeric_limits::max(); + return {max, max, -max, -max}; +} +inline SkGlyphRect full_rect() { + constexpr SkScalar max = std::numeric_limits::max(); + return {-max, -max, max, max}; +} +inline SkGlyphRect rect_union(SkGlyphRect a, SkGlyphRect b) { + return skvx::max(a.fRect, b.fRect); +} +inline SkGlyphRect rect_intersection(SkGlyphRect a, SkGlyphRect b) { + return skvx::min(a.fRect, b.fRect); +} + +enum class GlyphAction { + kUnset, + kAccept, + kReject, + kDrop, + kSize, +}; + +enum ActionType { + kDirectMask = 0, + kDirectMaskCPU = 2, + kMask = 4, + kSDFT = 6, + kPath = 8, + kDrawable = 10, +}; + +enum ActionTypeSize { + kTotalBits = 12 +}; +} // namespace skglyph + +// SkGlyphDigest contains a digest of information for making GPU drawing decisions. It can be +// referenced instead of the glyph itself in many situations. In the remote glyphs cache the +// SkGlyphDigest is the only information that needs to be stored in the cache. +class SkGlyphDigest { +public: + // An atlas consists of plots, and plots hold glyphs. The minimum a plot can be is 256x256. + // This means that the maximum size a glyph can be is 256x256. + static constexpr uint16_t kSkSideTooBigForAtlas = 256; + + // Default ctor is only needed for the hash table. + SkGlyphDigest() = default; + SkGlyphDigest(size_t index, const SkGlyph& glyph); + int index() const { return fIndex; } + bool isEmpty() const { return fIsEmpty; } + bool isColor() const { return fFormat == SkMask::kARGB32_Format; } + SkMask::Format maskFormat() const { return static_cast(fFormat); } + + skglyph::GlyphAction actionFor(skglyph::ActionType actionType) const { + return static_cast((fActions >> actionType) & 0b11); + } + + void setActionFor(skglyph::ActionType, SkGlyph*, sktext::StrikeForGPU*); + + uint16_t maxDimension() const { + return std::max(fWidth, fHeight); + } + + bool fitsInAtlasDirect() const { + return this->maxDimension() <= kSkSideTooBigForAtlas; + } + + bool fitsInAtlasInterpolated() const { + // Include the padding needed for interpolating the glyph when drawing. + return this->maxDimension() <= kSkSideTooBigForAtlas - 2; + } + + SkGlyphRect bounds() const { + return SkGlyphRect(fLeft, fTop, (SkScalar)fLeft + fWidth, (SkScalar)fTop + fHeight); + } + + static bool FitsInAtlas(const SkGlyph& glyph); + + // GetKey and Hash implement the required methods for SkTHashTable. + static SkPackedGlyphID GetKey(SkGlyphDigest digest) { + return SkPackedGlyphID{SkTo(digest.fPackedID)}; + } + static uint32_t Hash(SkPackedGlyphID packedID) { + return packedID.hash(); + } + +private: + void setAction(skglyph::ActionType actionType, skglyph::GlyphAction action) { + using namespace skglyph; + SkASSERT(action != GlyphAction::kUnset); + SkASSERT(this->actionFor(actionType) == GlyphAction::kUnset); + const uint64_t mask = 0b11 << actionType; + fActions &= ~mask; + fActions |= SkTo(action) << actionType; + } + + static_assert(SkPackedGlyphID::kEndData == 20); + static_assert(SkMask::kCountMaskFormats <= 8); + static_assert(SkTo(skglyph::GlyphAction::kSize) <= 4); + struct { + uint64_t fPackedID : SkPackedGlyphID::kEndData; + uint64_t fIndex : SkPackedGlyphID::kEndData; + uint64_t fIsEmpty : 1; + uint64_t fFormat : 3; + uint64_t fActions : skglyph::ActionTypeSize::kTotalBits; + }; + int16_t fLeft, fTop; + uint16_t fWidth, fHeight; +}; + +class SkGlyph { +public: + static std::optional MakeFromBuffer(SkReadBuffer&); + // SkGlyph() is used for testing. + constexpr SkGlyph() : SkGlyph{SkPackedGlyphID()} { } + SkGlyph(const SkGlyph&); + SkGlyph& operator=(const SkGlyph&); + SkGlyph(SkGlyph&&); + SkGlyph& operator=(SkGlyph&&); + ~SkGlyph(); + constexpr explicit SkGlyph(SkPackedGlyphID id) : fID{id} { } + + SkVector advanceVector() const { return SkVector{fAdvanceX, fAdvanceY}; } + SkScalar advanceX() const { return fAdvanceX; } + SkScalar advanceY() const { return fAdvanceY; } + + SkGlyphID getGlyphID() const { return fID.glyphID(); } + SkPackedGlyphID getPackedID() const { return fID; } + SkFixed getSubXFixed() const { return fID.getSubXFixed(); } + SkFixed getSubYFixed() const { return fID.getSubYFixed(); } + + size_t rowBytes() const; + size_t rowBytesUsingFormat(SkMask::Format format) const; + + // Call this to set all the metrics fields to 0 (e.g. if the scaler + // encounters an error measuring a glyph). Note: this does not alter the + // fImage, fPath, fID, fMaskFormat fields. + void zeroMetrics(); + + SkMask mask() const; + + SkMask mask(SkPoint position) const; + + // Image + // If we haven't already tried to associate an image with this glyph + // (i.e. setImageHasBeenCalled() returns false), then use the + // SkScalerContext or const void* argument to set the image. + bool setImage(SkArenaAlloc* alloc, SkScalerContext* scalerContext); + bool setImage(SkArenaAlloc* alloc, const void* image); + + // Merge the 'from' glyph into this glyph using alloc to allocate image data. Return the number + // of bytes allocated. Copy the width, height, top, left, format, and image into this glyph + // making a copy of the image using the alloc. + size_t setMetricsAndImage(SkArenaAlloc* alloc, const SkGlyph& from); + + // Returns true if the image has been set. + bool setImageHasBeenCalled() const { + return fImage != nullptr || this->isEmpty() || this->imageTooLarge(); + } + + // Return a pointer to the path if the image exists, otherwise return nullptr. + const void* image() const { SkASSERT(this->setImageHasBeenCalled()); return fImage; } + + // Return the size of the image. + size_t imageSize() const; + + // Path + // If we haven't already tried to associate a path to this glyph + // (i.e. setPathHasBeenCalled() returns false), then use the + // SkScalerContext or SkPath argument to try to do so. N.B. this + // may still result in no path being associated with this glyph, + // e.g. if you pass a null SkPath or the typeface is bitmap-only. + // + // This setPath() call is sticky... once you call it, the glyph + // stays in its state permanently, ignoring any future calls. + // + // Returns true if this is the first time you called setPath() + // and there actually is a path; call path() to get it. + bool setPath(SkArenaAlloc* alloc, SkScalerContext* scalerContext); + bool setPath(SkArenaAlloc* alloc, const SkPath* path, bool hairline); + + // Returns true if that path has been set. + bool setPathHasBeenCalled() const { return fPathData != nullptr; } + + // Return a pointer to the path if it exists, otherwise return nullptr. Only works if the + // path was previously set. + const SkPath* path() const; + bool pathIsHairline() const; + + bool setDrawable(SkArenaAlloc* alloc, SkScalerContext* scalerContext); + bool setDrawable(SkArenaAlloc* alloc, sk_sp drawable); + bool setDrawableHasBeenCalled() const { return fDrawableData != nullptr; } + SkDrawable* drawable() const; + + // Format + bool isColor() const { return fMaskFormat == SkMask::kARGB32_Format; } + SkMask::Format maskFormat() const { return fMaskFormat; } + size_t formatAlignment() const; + + // Bounds + int maxDimension() const { return std::max(fWidth, fHeight); } + SkIRect iRect() const { return SkIRect::MakeXYWH(fLeft, fTop, fWidth, fHeight); } + SkRect rect() const { return SkRect::MakeXYWH(fLeft, fTop, fWidth, fHeight); } + SkGlyphRect glyphRect() const { + return SkGlyphRect(fLeft, fTop, fLeft + fWidth, fTop + fHeight); + } + int left() const { return fLeft; } + int top() const { return fTop; } + int width() const { return fWidth; } + int height() const { return fHeight; } + bool isEmpty() const { + // fHeight == 0 -> fWidth == 0; + SkASSERT(fHeight != 0 || fWidth == 0); + return fWidth == 0; + } + bool imageTooLarge() const { return fWidth >= kMaxGlyphWidth; } + + // Make sure that the intercept information is on the glyph and return it, or return it if it + // already exists. + // * bounds - either end of the gap for the character. + // * scale, xPos - information about how wide the gap is. + // * array - accumulated gaps for many characters if not null. + // * count - the number of gaps. + void ensureIntercepts(const SkScalar bounds[2], SkScalar scale, SkScalar xPos, + SkScalar* array, int* count, SkArenaAlloc* alloc); + + // Deprecated. Do not use. The last use is in SkChromeRemoteCache, and will be deleted soon. + void setImage(void* image) { fImage = image; } + + // Serialize/deserialize functions. + // Flatten the metrics portions, but no drawing data. + void flattenMetrics(SkWriteBuffer&) const; + + // Flatten just the the mask data. + void flattenImage(SkWriteBuffer&) const; + + // Read the image data, store it in the alloc, and add it to the glyph. + size_t addImageFromBuffer(SkReadBuffer&, SkArenaAlloc*); + + // Flatten just the the path data. + void flattenPath(SkWriteBuffer&) const; + + // Read the path data, create the glyph's path data in the alloc, and add it to the glyph. + size_t addPathFromBuffer(SkReadBuffer&, SkArenaAlloc*); + + // Flatten just the drawable data. + void flattenDrawable(SkWriteBuffer&) const; + + // Read the drawable data, create the glyph's drawable data in the alloc, and add it to the + // glyph. + size_t addDrawableFromBuffer(SkReadBuffer&, SkArenaAlloc*); + +private: + // There are two sides to an SkGlyph, the scaler side (things that create glyph data) have + // access to all the fields. Scalers are assumed to maintain all the SkGlyph invariants. The + // consumer side has a tighter interface. + friend class RandomScalerContext; + friend class SkScalerContext; + friend class SkScalerContextProxy; + friend class SkScalerContext_Empty; + friend class SkScalerContext_FreeType; + friend class SkScalerContext_FreeType_Base; + friend class SkScalerContext_CairoFT; + friend class SkScalerContext_DW; + friend class SkScalerContext_GDI; + friend class SkScalerContext_Mac; + friend class SkStrikeClientImpl; + friend class SkTestScalerContext; + friend class SkTestSVGScalerContext; + friend class SkUserScalerContext; + friend class TestSVGTypeface; + friend class TestTypeface; + friend class SkGlyphTestPeer; + + inline static constexpr uint16_t kMaxGlyphWidth = 1u << 13u; + + // Support horizontal and vertical skipping strike-through / underlines. + // The caller walks the linked list looking for a match. For a horizontal underline, + // the fBounds contains the top and bottom of the underline. The fInterval pair contains the + // beginning and end of the intersection of the bounds and the glyph's path. + // If interval[0] >= interval[1], no intersection was found. + struct Intercept { + Intercept* fNext; + SkScalar fBounds[2]; // for horz underlines, the boundaries in Y + SkScalar fInterval[2]; // the outside intersections of the axis and the glyph + }; + + struct PathData { + Intercept* fIntercept{nullptr}; + SkPath fPath; + bool fHasPath{false}; + // A normal user-path will have patheffects applied to it and eventually become a dev-path. + // A dev-path is always a fill-path, except when it is hairline. + // The fPath is a dev-path, so sidecar the paths hairline status. + // This allows the user to avoid filling paths which should not be filled. + bool fHairline{false}; + }; + + struct DrawableData { + Intercept* fIntercept{nullptr}; + sk_sp fDrawable; + bool fHasDrawable{false}; + }; + + size_t allocImage(SkArenaAlloc* alloc); + + void installImage(void* imageData) { + SkASSERT(!this->setImageHasBeenCalled()); + fImage = imageData; + } + + // path == nullptr indicates that there is no path. + void installPath(SkArenaAlloc* alloc, const SkPath* path, bool hairline); + + // drawable == nullptr indicates that there is no path. + void installDrawable(SkArenaAlloc* alloc, sk_sp drawable); + + // The width and height of the glyph mask. + uint16_t fWidth = 0, + fHeight = 0; + + // The offset from the glyphs origin on the baseline to the top left of the glyph mask. + int16_t fTop = 0, + fLeft = 0; + + // fImage must remain null if the glyph is empty or if width > kMaxGlyphWidth. + void* fImage = nullptr; + + // Path data has tricky state. If the glyph isEmpty, then fPathData should always be nullptr, + // else if fPathData is not null, then a path has been requested. The fPath field of fPathData + // may still be null after the request meaning that there is no path for this glyph. + PathData* fPathData = nullptr; + DrawableData* fDrawableData = nullptr; + + // The advance for this glyph. + float fAdvanceX = 0, + fAdvanceY = 0; + + SkMask::Format fMaskFormat{SkMask::kBW_Format}; + + // Used by the SkScalerContext to pass state from generateMetrics to generateImage. + // Usually specifies which glyph representation was used to generate the metrics. + uint16_t fScalerContextBits = 0; + + // An SkGlyph can be created with just a packedID, but generally speaking some glyph factory + // needs to actually fill out the glyph before it can be used as part of that system. + SkDEBUGCODE(bool fAdvancesBoundsFormatAndInitialPathDone{false};) + + SkPackedGlyphID fID; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkGlyphRunPainter.cpp b/gfx/skia/skia/src/core/SkGlyphRunPainter.cpp new file mode 100644 index 0000000000..48755aaff4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGlyphRunPainter.cpp @@ -0,0 +1,366 @@ +/* + * Copyright 2018 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkGlyphRunPainter.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPathEffect.h" +#include "include/private/base/SkTDArray.h" +#include "src/core/SkDevice.h" +#include "src/core/SkDraw.h" +#include "src/core/SkEnumerate.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkStrikeSpec.h" +#include "src/text/GlyphRun.h" + +using namespace skglyph; +using namespace sktext; + +namespace { +SkScalerContextFlags compute_scaler_context_flags(const SkColorSpace* cs) { + // If we're doing linear blending, then we can disable the gamma hacks. + // Otherwise, leave them on. In either case, we still want the contrast boost: + // TODO: Can we be even smarter about mask gamma based on the dest transfer function? + if (cs && cs->gammaIsLinear()) { + return SkScalerContextFlags::kBoostContrast; + } else { + return SkScalerContextFlags::kFakeGammaAndBoostContrast; + } +} + +// TODO: collect this up into a single class when all the details are worked out. +// This is duplicate code. The original is in SubRunContainer.cpp. +std::tuple, SkZip> +prepare_for_path_drawing(SkStrike* strike, + SkZip source, + SkZip acceptedBuffer, + SkZip rejectedBuffer) { + int acceptedSize = 0; + int rejectedSize = 0; + strike->lock(); + for (auto [glyphID, pos] : source) { + if (!SkScalarsAreFinite(pos.x(), pos.y())) { + continue; + } + const SkPackedGlyphID packedID{glyphID}; + switch (SkGlyphDigest digest = strike->digestFor(kPath, packedID); + digest.actionFor(kPath)) { + case GlyphAction::kAccept: + acceptedBuffer[acceptedSize++] = std::make_tuple(strike->glyph(digest), pos); + break; + case GlyphAction::kReject: + rejectedBuffer[rejectedSize++] = std::make_tuple(glyphID, pos); + break; + default: + break; + } + } + strike->unlock(); + return {acceptedBuffer.first(acceptedSize), rejectedBuffer.first(rejectedSize)}; +} + +// TODO: collect this up into a single class when all the details are worked out. +// This is duplicate code. The original is in SubRunContainer.cpp. +std::tuple, SkZip> +prepare_for_drawable_drawing(SkStrike* strike, + SkZip source, + SkZip acceptedBuffer, + SkZip rejectedBuffer) { + int acceptedSize = 0; + int rejectedSize = 0; + strike->lock(); + for (auto [glyphID, pos] : source) { + if (!SkScalarsAreFinite(pos.x(), pos.y())) { + continue; + } + const SkPackedGlyphID packedID{glyphID}; + switch (SkGlyphDigest digest = strike->digestFor(kDrawable, packedID); + digest.actionFor(kDrawable)) { + case GlyphAction::kAccept: + acceptedBuffer[acceptedSize++] = std::make_tuple(strike->glyph(digest), pos); + break; + case GlyphAction::kReject: + rejectedBuffer[rejectedSize++] = std::make_tuple(glyphID, pos); + break; + default: + break; + } + } + strike->unlock(); + return {acceptedBuffer.first(acceptedSize), rejectedBuffer.first(rejectedSize)}; +} + +std::tuple, SkZip> +prepare_for_direct_mask_drawing(SkStrike* strike, + const SkMatrix& creationMatrix, + SkZip source, + SkZip acceptedBuffer, + SkZip rejectedBuffer) { + const SkIPoint mask = strike->roundingSpec().ignorePositionFieldMask; + const SkPoint halfSampleFreq = strike->roundingSpec().halfAxisSampleFreq; + + // Build up the mapping from source space to device space. Add the rounding constant + // halfSampleFreq, so we just need to floor to get the device result. + SkMatrix positionMatrixWithRounding = creationMatrix; + positionMatrixWithRounding.postTranslate(halfSampleFreq.x(), halfSampleFreq.y()); + + int acceptedSize = 0; + int rejectedSize = 0; + strike->lock(); + for (auto [glyphID, pos] : source) { + if (!SkScalarsAreFinite(pos.x(), pos.y())) { + continue; + } + + const SkPoint mappedPos = positionMatrixWithRounding.mapPoint(pos); + const SkPackedGlyphID packedGlyphID = SkPackedGlyphID{glyphID, mappedPos, mask}; + switch (SkGlyphDigest digest = strike->digestFor(kDirectMaskCPU, packedGlyphID); + digest.actionFor(kDirectMaskCPU)) { + case GlyphAction::kAccept: { + const SkPoint roundedPos{SkScalarFloorToScalar(mappedPos.x()), + SkScalarFloorToScalar(mappedPos.y())}; + acceptedBuffer[acceptedSize++] = + std::make_tuple(strike->glyph(digest), roundedPos); + break; + } + case GlyphAction::kReject: + rejectedBuffer[rejectedSize++] = std::make_tuple(glyphID, pos); + break; + default: + break; + } + } + strike->unlock(); + + return {acceptedBuffer.first(acceptedSize), rejectedBuffer.first(rejectedSize)}; +} +} // namespace + +// -- SkGlyphRunListPainterCPU --------------------------------------------------------------------- +SkGlyphRunListPainterCPU::SkGlyphRunListPainterCPU(const SkSurfaceProps& props, + SkColorType colorType, + SkColorSpace* cs) + : fDeviceProps{props} + , fBitmapFallbackProps{SkSurfaceProps{props.flags(), kUnknown_SkPixelGeometry}} + , fColorType{colorType} + , fScalerContextFlags{compute_scaler_context_flags(cs)} {} + +void SkGlyphRunListPainterCPU::drawForBitmapDevice(SkCanvas* canvas, + const BitmapDevicePainter* bitmapDevice, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& paint, + const SkMatrix& drawMatrix) { + SkSTArray<64, const SkGlyph*> acceptedPackedGlyphIDs; + SkSTArray<64, SkPoint> acceptedPositions; + SkSTArray<64, SkGlyphID> rejectedGlyphIDs; + SkSTArray<64, SkPoint> rejectedPositions; + const int maxGlyphRunSize = glyphRunList.maxGlyphRunSize(); + acceptedPackedGlyphIDs.resize(maxGlyphRunSize); + acceptedPositions.resize(maxGlyphRunSize); + const auto acceptedBuffer = SkMakeZip(acceptedPackedGlyphIDs, acceptedPositions); + rejectedGlyphIDs.resize(maxGlyphRunSize); + rejectedPositions.resize(maxGlyphRunSize); + const auto rejectedBuffer = SkMakeZip(rejectedGlyphIDs, rejectedPositions); + + // The bitmap blitters can only draw lcd text to a N32 bitmap in srcOver. Otherwise, + // convert the lcd text into A8 text. The props communicate this to the scaler. + auto& props = (kN32_SkColorType == fColorType && paint.isSrcOver()) + ? fDeviceProps + : fBitmapFallbackProps; + + SkPoint drawOrigin = glyphRunList.origin(); + SkMatrix positionMatrix{drawMatrix}; + positionMatrix.preTranslate(drawOrigin.x(), drawOrigin.y()); + for (auto& glyphRun : glyphRunList) { + const SkFont& runFont = glyphRun.font(); + + SkZip source = glyphRun.source(); + + if (SkStrikeSpec::ShouldDrawAsPath(paint, runFont, positionMatrix)) { + auto [strikeSpec, strikeToSourceScale] = + SkStrikeSpec::MakePath(runFont, paint, props, fScalerContextFlags); + + auto strike = strikeSpec.findOrCreateStrike(); + + { + auto [accepted, rejected] = prepare_for_path_drawing(strike.get(), + source, + acceptedBuffer, + rejectedBuffer); + + source = rejected; + // The paint we draw paths with must have the same anti-aliasing state as the + // runFont allowing the paths to have the same edging as the glyph masks. + SkPaint pathPaint = paint; + pathPaint.setAntiAlias(runFont.hasSomeAntiAliasing()); + + const bool stroking = pathPaint.getStyle() != SkPaint::kFill_Style; + const bool hairline = pathPaint.getStrokeWidth() == 0; + const bool needsExactCTM = pathPaint.getShader() || + pathPaint.getPathEffect() || + pathPaint.getMaskFilter() || + (stroking && !hairline); + + if (!needsExactCTM) { + for (auto [glyph, pos] : accepted) { + const SkPath* path = glyph->path(); + SkMatrix m; + SkPoint translate = drawOrigin + pos; + m.setScaleTranslate(strikeToSourceScale, strikeToSourceScale, + translate.x(), translate.y()); + SkAutoCanvasRestore acr(canvas, true); + canvas->concat(m); + canvas->drawPath(*path, pathPaint); + } + } else { + for (auto [glyph, pos] : accepted) { + const SkPath* path = glyph->path(); + SkMatrix m; + SkPoint translate = drawOrigin + pos; + m.setScaleTranslate(strikeToSourceScale, strikeToSourceScale, + translate.x(), translate.y()); + + SkPath deviceOutline; + path->transform(m, &deviceOutline); + deviceOutline.setIsVolatile(true); + canvas->drawPath(deviceOutline, pathPaint); + } + } + } + + if (!source.empty()) { + auto [accepted, rejected] = prepare_for_drawable_drawing(strike.get(), + source, + acceptedBuffer, + rejectedBuffer); + source = rejected; + + for (auto [glyph, pos] : accepted) { + SkDrawable* drawable = glyph->drawable(); + SkMatrix m; + SkPoint translate = drawOrigin + pos; + m.setScaleTranslate(strikeToSourceScale, strikeToSourceScale, + translate.x(), translate.y()); + SkAutoCanvasRestore acr(canvas, false); + SkRect drawableBounds = drawable->getBounds(); + m.mapRect(&drawableBounds); + canvas->saveLayer(&drawableBounds, &paint); + drawable->draw(canvas, &m); + } + } + } + if (!source.empty() && !positionMatrix.hasPerspective()) { + SkStrikeSpec strikeSpec = SkStrikeSpec::MakeMask( + runFont, paint, props, fScalerContextFlags, positionMatrix); + + auto strike = strikeSpec.findOrCreateStrike(); + + auto [accepted, rejected] = prepare_for_direct_mask_drawing(strike.get(), + positionMatrix, + source, + acceptedBuffer, + rejectedBuffer); + source = rejected; + bitmapDevice->paintMasks(accepted, paint); + } + if (!source.empty()) { + std::vector sourcePositions; + + // Create a strike is source space to calculate scale information. + SkStrikeSpec scaleStrikeSpec = SkStrikeSpec::MakeMask( + runFont, paint, props, fScalerContextFlags, SkMatrix::I()); + SkBulkGlyphMetrics metrics{scaleStrikeSpec}; + + auto glyphIDs = source.get<0>(); + auto positions = source.get<1>(); + SkSpan glyphs = metrics.glyphs(glyphIDs); + SkScalar maxScale = SK_ScalarMin; + + // Calculate the scale that makes the longest edge 1:1 with its side in the cache. + for (auto [glyph, pos] : SkMakeZip(glyphs, positions)) { + SkPoint corners[4]; + SkPoint srcPos = pos + drawOrigin; + // Store off the positions in device space to position the glyphs during drawing. + sourcePositions.push_back(srcPos); + SkRect rect = glyph->rect(); + rect.makeOffset(srcPos); + positionMatrix.mapRectToQuad(corners, rect); + // left top -> right top + SkScalar scale = (corners[1] - corners[0]).length() / rect.width(); + maxScale = std::max(maxScale, scale); + // right top -> right bottom + scale = (corners[2] - corners[1]).length() / rect.height(); + maxScale = std::max(maxScale, scale); + // right bottom -> left bottom + scale = (corners[3] - corners[2]).length() / rect.width(); + maxScale = std::max(maxScale, scale); + // left bottom -> left top + scale = (corners[0] - corners[3]).length() / rect.height(); + maxScale = std::max(maxScale, scale); + } + + if (maxScale <= 0) { + continue; // to the next run. + } + + if (maxScale * runFont.getSize() > 256) { + maxScale = 256.0f / runFont.getSize(); + } + + SkMatrix cacheScale = SkMatrix::Scale(maxScale, maxScale); + SkStrikeSpec strikeSpec = SkStrikeSpec::MakeMask( + runFont, paint, props, fScalerContextFlags, cacheScale); + + auto strike = strikeSpec.findOrCreateStrike(); + + auto [accepted, rejected] = prepare_for_direct_mask_drawing(strike.get(), + positionMatrix, + source, + acceptedBuffer, + rejectedBuffer); + const SkScalar invMaxScale = 1.0f/maxScale; + for (auto [glyph, srcPos] : SkMakeZip(accepted.get<0>(), sourcePositions)) { + SkMask mask = glyph->mask(); + // TODO: is this needed will A8 and BW just work? + if (mask.fFormat != SkMask::kARGB32_Format) { + continue; + } + SkBitmap bm; + bm.installPixels(SkImageInfo::MakeN32Premul(mask.fBounds.size()), + mask.fImage, + mask.fRowBytes); + + // Since the glyph in the cache is scaled by maxScale, its top left vector is too + // long. Reduce it to find proper positions on the device. + SkPoint realPos = + srcPos + SkPoint::Make(mask.fBounds.left(), mask.fBounds.top())*invMaxScale; + + // Calculate the preConcat matrix for drawBitmap to get the rectangle from the + // glyph cache (which is multiplied by maxScale) to land in the right place. + SkMatrix translate = SkMatrix::Translate(realPos); + translate.preScale(invMaxScale, invMaxScale); + + // Draw the bitmap using the rect from the scaled cache, and not the source + // rectangle for the glyph. + bitmapDevice->drawBitmap( + bm, translate, nullptr, SkSamplingOptions{SkFilterMode::kLinear}, + paint); + } + } + + // TODO: have the mask stage above reject the glyphs that are too big, and handle the + // rejects in a more sophisticated stage. + } +} diff --git a/gfx/skia/skia/src/core/SkGlyphRunPainter.h b/gfx/skia/skia/src/core/SkGlyphRunPainter.h new file mode 100644 index 0000000000..8519770509 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGlyphRunPainter.h @@ -0,0 +1,52 @@ +/* + * Copyright 2018 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGlyphRunPainter_DEFINED +#define SkGlyphRunPainter_DEFINED + +#include "include/core/SkColorType.h" +#include "include/core/SkSurfaceProps.h" +#include "src/base/SkZip.h" +#include "src/core/SkScalerContext.h" + +class SkColorSpace; +class SkDrawableGlyphBuffer; +namespace sktext { class GlyphRunList; } + +// -- SkGlyphRunListPainterCPU --------------------------------------------------------------------- +class SkGlyphRunListPainterCPU { +public: + class BitmapDevicePainter { + public: + BitmapDevicePainter() = default; + BitmapDevicePainter(const BitmapDevicePainter&) = default; + virtual ~BitmapDevicePainter() = default; + + virtual void paintMasks(SkZip accepted, + const SkPaint& paint) const = 0; + virtual void drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect* dstOrNull, + const SkSamplingOptions&, const SkPaint&) const = 0; + }; + + SkGlyphRunListPainterCPU(const SkSurfaceProps& props, + SkColorType colorType, + SkColorSpace* cs); + + void drawForBitmapDevice( + SkCanvas* canvas, const BitmapDevicePainter* bitmapDevice, + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint, + const SkMatrix& drawMatrix); +private: + // The props as on the actual device. + const SkSurfaceProps fDeviceProps; + + // The props for when the bitmap device can't draw LCD text. + const SkSurfaceProps fBitmapFallbackProps; + const SkColorType fColorType; + const SkScalerContextFlags fScalerContextFlags; +}; +#endif // SkGlyphRunPainter_DEFINED diff --git a/gfx/skia/skia/src/core/SkGpuBlurUtils.cpp b/gfx/skia/skia/src/core/SkGpuBlurUtils.cpp new file mode 100644 index 0000000000..9f18c115f8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGpuBlurUtils.cpp @@ -0,0 +1,1039 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkGpuBlurUtils.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkRect.h" +#include "src/base/SkMathPriv.h" + +#if defined(SK_GANESH) +#include "include/core/SkColorSpace.h" +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/effects/GrGaussianConvolutionFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrMatrixConvolutionEffect.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" + +#include "src/gpu/ganesh/SurfaceDrawContext.h" + +using Direction = GrGaussianConvolutionFragmentProcessor::Direction; + +static void fill_in_2D_gaussian_kernel( + float* kernel, int width, int height, SkScalar sigmaX, SkScalar sigmaY) { + const float twoSigmaSqrdX = 2.0f * SkScalarToFloat(SkScalarSquare(sigmaX)); + const float twoSigmaSqrdY = 2.0f * SkScalarToFloat(SkScalarSquare(sigmaY)); + + // SkGpuBlurUtils::GaussianBlur() should have detected the cases where a 2D blur + // degenerates to a 1D on X or Y, or to the identity. + SkASSERT(!SkGpuBlurUtils::IsEffectivelyZeroSigma(sigmaX) && + !SkGpuBlurUtils::IsEffectivelyZeroSigma(sigmaY)); + SkASSERT(!SkScalarNearlyZero(twoSigmaSqrdX) && !SkScalarNearlyZero(twoSigmaSqrdY)); + + const float sigmaXDenom = 1.0f / twoSigmaSqrdX; + const float sigmaYDenom = 1.0f / twoSigmaSqrdY; + const int xRadius = width / 2; + const int yRadius = height / 2; + + float sum = 0.0f; + for (int x = 0; x < width; x++) { + float xTerm = static_cast(x - xRadius); + xTerm = xTerm * xTerm * sigmaXDenom; + for (int y = 0; y < height; y++) { + float yTerm = static_cast(y - yRadius); + float xyTerm = sk_float_exp(-(xTerm + yTerm * yTerm * sigmaYDenom)); + // Note that the constant term (1/(sqrt(2*pi*sigma^2)) of the Gaussian + // is dropped here, since we renormalize the kernel below. + kernel[y * width + x] = xyTerm; + sum += xyTerm; + } + } + // Normalize the kernel + float scale = 1.0f / sum; + for (int i = 0; i < width * height; ++i) { + kernel[i] *= scale; + } +} + +/** + * Draws 'dstRect' into 'surfaceFillContext' evaluating a 1D Gaussian over 'srcView'. The src rect + * is 'dstRect' offset by 'dstToSrcOffset'. 'mode' and 'bounds' are applied to the src coords. + */ +static void convolve_gaussian_1d(skgpu::ganesh::SurfaceFillContext* sfc, + GrSurfaceProxyView srcView, + const SkIRect srcSubset, + SkIVector dstToSrcOffset, + const SkIRect& dstRect, + SkAlphaType srcAlphaType, + Direction direction, + int radius, + float sigma, + SkTileMode mode) { + SkASSERT(radius && !SkGpuBlurUtils::IsEffectivelyZeroSigma(sigma)); + auto wm = SkTileModeToWrapMode(mode); + auto srcRect = dstRect.makeOffset(dstToSrcOffset); + // NOTE: This could just be GrMatrixConvolutionEffect with one of the dimensions set to 1 + // and the appropriate kernel already computed, but there's value in keeping the shader simpler. + // TODO(michaelludwig): Is this true? If not, is the shader key simplicity worth it two have + // two convolution effects? + std::unique_ptr conv = + GrGaussianConvolutionFragmentProcessor::Make(std::move(srcView), + srcAlphaType, + direction, + radius, + sigma, + wm, + srcSubset, + &srcRect, + *sfc->caps()); + sfc->fillRectToRectWithFP(srcRect, dstRect, std::move(conv)); +} + +static std::unique_ptr convolve_gaussian_2d( + GrRecordingContext* rContext, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + const SkIRect& srcBounds, + const SkIRect& dstBounds, + int radiusX, + int radiusY, + SkScalar sigmaX, + SkScalar sigmaY, + SkTileMode mode, + sk_sp finalCS, + SkBackingFit dstFit) { + SkASSERT(radiusX && radiusY); + SkASSERT(!SkGpuBlurUtils::IsEffectivelyZeroSigma(sigmaX) && + !SkGpuBlurUtils::IsEffectivelyZeroSigma(sigmaY)); + // Create the sdc with default SkSurfaceProps. Gaussian blurs will soon use a + // SurfaceFillContext, at which point the SkSurfaceProps won't exist anymore. + auto sdc = skgpu::ganesh::SurfaceDrawContext::Make( + rContext, + srcColorType, + std::move(finalCS), + dstFit, + dstBounds.size(), + SkSurfaceProps(), + /*label=*/"SurfaceDrawContext_ConvolveGaussian2d", + 1, + GrMipmapped::kNo, + srcView.proxy()->isProtected(), + srcView.origin()); + if (!sdc) { + return nullptr; + } + + SkISize size = SkISize::Make(SkGpuBlurUtils::KernelWidth(radiusX), + SkGpuBlurUtils::KernelWidth(radiusY)); + SkIPoint kernelOffset = SkIPoint::Make(radiusX, radiusY); + GrPaint paint; + auto wm = SkTileModeToWrapMode(mode); + + // GaussianBlur() should have downsampled the request until we can handle the 2D blur with + // just a uniform array. + SkASSERT(size.area() <= GrMatrixConvolutionEffect::kMaxUniformSize); + float kernel[GrMatrixConvolutionEffect::kMaxUniformSize]; + fill_in_2D_gaussian_kernel(kernel, size.width(), size.height(), sigmaX, sigmaY); + auto conv = GrMatrixConvolutionEffect::Make(rContext, + std::move(srcView), + srcBounds, + size, + kernel, + 1.0f, + 0.0f, + kernelOffset, + wm, + true, + *sdc->caps()); + + paint.setColorFragmentProcessor(std::move(conv)); + paint.setPorterDuffXPFactory(SkBlendMode::kSrc); + + // 'dstBounds' is actually in 'srcView' proxy space. It represents the blurred area from src + // space that we want to capture in the new RTC at {0, 0}. Hence, we use its size as the rect to + // draw and it directly as the local rect. + sdc->fillRectToRect(nullptr, + std::move(paint), + GrAA::kNo, + SkMatrix::I(), + SkRect::Make(dstBounds.size()), + SkRect::Make(dstBounds)); + + return sdc; +} + +static std::unique_ptr convolve_gaussian( + GrRecordingContext* rContext, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + SkIRect srcBounds, + SkIRect dstBounds, + Direction direction, + int radius, + float sigma, + SkTileMode mode, + sk_sp finalCS, + SkBackingFit fit) { + using namespace SkGpuBlurUtils; + SkASSERT(radius > 0 && !SkGpuBlurUtils::IsEffectivelyZeroSigma(sigma)); + // Logically we're creating an infinite blur of 'srcBounds' of 'srcView' with 'mode' tiling + // and then capturing the 'dstBounds' portion in a new RTC where the top left of 'dstBounds' is + // at {0, 0} in the new RTC. + // + // Create the sdc with default SkSurfaceProps. Gaussian blurs will soon use a + // SurfaceFillContext, at which point the SkSurfaceProps won't exist anymore. + auto dstSDC = + skgpu::ganesh::SurfaceDrawContext::Make(rContext, + srcColorType, + std::move(finalCS), + fit, + dstBounds.size(), + SkSurfaceProps(), + /*label=*/"SurfaceDrawContext_ConvolveGaussian", + 1, + GrMipmapped::kNo, + srcView.proxy()->isProtected(), + srcView.origin()); + if (!dstSDC) { + return nullptr; + } + // This represents the translation from 'dstSurfaceDrawContext' coords to 'srcView' coords. + auto rtcToSrcOffset = dstBounds.topLeft(); + + auto srcBackingBounds = SkIRect::MakeSize(srcView.proxy()->backingStoreDimensions()); + // We've implemented splitting the dst bounds up into areas that do and do not need to + // use shader based tiling but only for some modes... + bool canSplit = mode == SkTileMode::kDecal || mode == SkTileMode::kClamp; + // ...but it's not worth doing the splitting if we'll get HW tiling instead of shader tiling. + bool canHWTile = + srcBounds.contains(srcBackingBounds) && + !rContext->priv().caps()->reducedShaderMode() && // this mode always uses shader tiling + !(mode == SkTileMode::kDecal && !rContext->priv().caps()->clampToBorderSupport()); + if (!canSplit || canHWTile) { + auto dstRect = SkIRect::MakeSize(dstBounds.size()); + convolve_gaussian_1d(dstSDC.get(), + std::move(srcView), + srcBounds, + rtcToSrcOffset, + dstRect, + srcAlphaType, + direction, + radius, + sigma, + mode); + return dstSDC; + } + + // 'left' and 'right' are the sub rects of 'srcBounds' where 'mode' must be enforced. + // 'mid' is the area where we can ignore the mode because the kernel does not reach to the + // edge of 'srcBounds'. + SkIRect mid, left, right; + // 'top' and 'bottom' are areas of 'dstBounds' that are entirely above/below 'srcBounds'. + // These are areas that we can simply clear in the dst in kDecal mode. If 'srcBounds' + // straddles the top edge of 'dstBounds' then 'top' will be inverted and we will skip + // processing for the rect. Similar for 'bottom'. The positional/directional labels above refer + // to the Direction::kX case and one should think of these as 'left' and 'right' for + // Direction::kY. + SkIRect top, bottom; + if (Direction::kX == direction) { + top = {dstBounds.left(), dstBounds.top(), dstBounds.right(), srcBounds.top()}; + bottom = {dstBounds.left(), srcBounds.bottom(), dstBounds.right(), dstBounds.bottom()}; + + // Inset for sub-rect of 'srcBounds' where the x-dir kernel doesn't reach the edges, clipped + // vertically to dstBounds. + int midA = std::max(srcBounds.top(), dstBounds.top()); + int midB = std::min(srcBounds.bottom(), dstBounds.bottom()); + mid = {srcBounds.left() + radius, midA, srcBounds.right() - radius, midB}; + if (mid.isEmpty()) { + // There is no middle where the bounds can be ignored. Make the left span the whole + // width of dst and we will not draw mid or right. + left = {dstBounds.left(), mid.top(), dstBounds.right(), mid.bottom()}; + } else { + left = {dstBounds.left(), mid.top(), mid.left(), mid.bottom()}; + right = {mid.right(), mid.top(), dstBounds.right(), mid.bottom()}; + } + } else { + // This is the same as the x direction code if you turn your head 90 degrees CCW. Swap x and + // y and swap top/bottom with left/right. + top = {dstBounds.left(), dstBounds.top(), srcBounds.left(), dstBounds.bottom()}; + bottom = {srcBounds.right(), dstBounds.top(), dstBounds.right(), dstBounds.bottom()}; + + int midA = std::max(srcBounds.left(), dstBounds.left()); + int midB = std::min(srcBounds.right(), dstBounds.right()); + mid = {midA, srcBounds.top() + radius, midB, srcBounds.bottom() - radius}; + + if (mid.isEmpty()) { + left = {mid.left(), dstBounds.top(), mid.right(), dstBounds.bottom()}; + } else { + left = {mid.left(), dstBounds.top(), mid.right(), mid.top()}; + right = {mid.left(), mid.bottom(), mid.right(), dstBounds.bottom()}; + } + } + + auto convolve = [&](SkIRect rect) { + // Transform rect into the render target's coord system. + rect.offset(-rtcToSrcOffset); + convolve_gaussian_1d(dstSDC.get(), + srcView, + srcBounds, + rtcToSrcOffset, + rect, + srcAlphaType, + direction, + radius, + sigma, + mode); + }; + auto clear = [&](SkIRect rect) { + // Transform rect into the render target's coord system. + rect.offset(-rtcToSrcOffset); + dstSDC->clearAtLeast(rect, SK_PMColor4fTRANSPARENT); + }; + + // Doing mid separately will cause two draws to occur (left and right batch together). At + // small sizes of mid it is worse to issue more draws than to just execute the slightly + // more complicated shader that implements the tile mode across mid. This threshold is + // very arbitrary right now. It is believed that a 21x44 mid on a Moto G4 is a significant + // regression compared to doing one draw but it has not been locally evaluated or tuned. + // The optimal cutoff is likely to vary by GPU. + if (!mid.isEmpty() && mid.width() * mid.height() < 256 * 256) { + left.join(mid); + left.join(right); + mid = SkIRect::MakeEmpty(); + right = SkIRect::MakeEmpty(); + // It's unknown whether for kDecal it'd be better to expand the draw rather than a draw and + // up to two clears. + if (mode == SkTileMode::kClamp) { + left.join(top); + left.join(bottom); + top = SkIRect::MakeEmpty(); + bottom = SkIRect::MakeEmpty(); + } + } + + if (!top.isEmpty()) { + if (mode == SkTileMode::kDecal) { + clear(top); + } else { + convolve(top); + } + } + + if (!bottom.isEmpty()) { + if (mode == SkTileMode::kDecal) { + clear(bottom); + } else { + convolve(bottom); + } + } + + if (mid.isEmpty()) { + convolve(left); + } else { + convolve(left); + convolve(right); + convolve(mid); + } + return dstSDC; +} + +// Expand the contents of 'src' to fit in 'dstSize'. At this point, we are expanding an intermediate +// image, so there's no need to account for a proxy offset from the original input. +static std::unique_ptr reexpand( + GrRecordingContext* rContext, + std::unique_ptr src, + const SkRect& srcBounds, + SkISize dstSize, + sk_sp colorSpace, + SkBackingFit fit) { + GrSurfaceProxyView srcView = src->readSurfaceView(); + if (!srcView.asTextureProxy()) { + return nullptr; + } + + GrColorType srcColorType = src->colorInfo().colorType(); + SkAlphaType srcAlphaType = src->colorInfo().alphaType(); + + src.reset(); // no longer needed + + // Create the sdc with default SkSurfaceProps. Gaussian blurs will soon use a + // SurfaceFillContext, at which point the SkSurfaceProps won't exist anymore. + auto dstSDC = skgpu::ganesh::SurfaceDrawContext::Make(rContext, + srcColorType, + std::move(colorSpace), + fit, + dstSize, + SkSurfaceProps(), + /*label=*/"SurfaceDrawContext_Reexpand", + 1, + GrMipmapped::kNo, + srcView.proxy()->isProtected(), + srcView.origin()); + if (!dstSDC) { + return nullptr; + } + + GrPaint paint; + auto fp = GrTextureEffect::MakeSubset(std::move(srcView), + srcAlphaType, + SkMatrix::I(), + GrSamplerState::Filter::kLinear, + srcBounds, + srcBounds, + *rContext->priv().caps()); + paint.setColorFragmentProcessor(std::move(fp)); + paint.setPorterDuffXPFactory(SkBlendMode::kSrc); + + dstSDC->fillRectToRect( + nullptr, std::move(paint), GrAA::kNo, SkMatrix::I(), SkRect::Make(dstSize), srcBounds); + + return dstSDC; +} + +static std::unique_ptr two_pass_gaussian( + GrRecordingContext* rContext, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + sk_sp colorSpace, + SkIRect srcBounds, + SkIRect dstBounds, + float sigmaX, + float sigmaY, + int radiusX, + int radiusY, + SkTileMode mode, + SkBackingFit fit) { + SkASSERT(radiusX || radiusY); + std::unique_ptr dstSDC; + if (radiusX > 0) { + SkBackingFit xFit = radiusY > 0 ? SkBackingFit::kApprox : fit; + // Expand the dstBounds vertically to produce necessary content for the y-pass. Then we will + // clip these in a tile-mode dependent way to ensure the tile-mode gets implemented + // correctly. However, if we're not going to do a y-pass then we must use the original + // dstBounds without clipping to produce the correct output size. + SkIRect xPassDstBounds = dstBounds; + if (radiusY) { + xPassDstBounds.outset(0, radiusY); + if (mode == SkTileMode::kRepeat || mode == SkTileMode::kMirror) { + int srcH = srcBounds.height(); + int srcTop = srcBounds.top(); + if (mode == SkTileMode::kMirror) { + srcTop -= srcH; + srcH *= 2; + } + + float floatH = srcH; + // First row above the dst rect where we should restart the tile mode. + int n = sk_float_floor2int_no_saturate((xPassDstBounds.top() - srcTop) / floatH); + int topClip = srcTop + n * srcH; + + // First row above below the dst rect where we should restart the tile mode. + n = sk_float_ceil2int_no_saturate((xPassDstBounds.bottom() - srcBounds.bottom()) / + floatH); + int bottomClip = srcBounds.bottom() + n * srcH; + + xPassDstBounds.fTop = std::max(xPassDstBounds.top(), topClip); + xPassDstBounds.fBottom = std::min(xPassDstBounds.bottom(), bottomClip); + } else { + if (xPassDstBounds.fBottom <= srcBounds.top()) { + if (mode == SkTileMode::kDecal) { + return nullptr; + } + xPassDstBounds.fTop = srcBounds.top(); + xPassDstBounds.fBottom = xPassDstBounds.fTop + 1; + } else if (xPassDstBounds.fTop >= srcBounds.bottom()) { + if (mode == SkTileMode::kDecal) { + return nullptr; + } + xPassDstBounds.fBottom = srcBounds.bottom(); + xPassDstBounds.fTop = xPassDstBounds.fBottom - 1; + } else { + xPassDstBounds.fTop = std::max(xPassDstBounds.fTop, srcBounds.top()); + xPassDstBounds.fBottom = std::min(xPassDstBounds.fBottom, srcBounds.bottom()); + } + int leftSrcEdge = srcBounds.fLeft - radiusX; + int rightSrcEdge = srcBounds.fRight + radiusX; + if (mode == SkTileMode::kClamp) { + // In clamp the column just outside the src bounds has the same value as the + // column just inside, unlike decal. + leftSrcEdge += 1; + rightSrcEdge -= 1; + } + if (xPassDstBounds.fRight <= leftSrcEdge) { + if (mode == SkTileMode::kDecal) { + return nullptr; + } + xPassDstBounds.fLeft = xPassDstBounds.fRight - 1; + } else { + xPassDstBounds.fLeft = std::max(xPassDstBounds.fLeft, leftSrcEdge); + } + if (xPassDstBounds.fLeft >= rightSrcEdge) { + if (mode == SkTileMode::kDecal) { + return nullptr; + } + xPassDstBounds.fRight = xPassDstBounds.fLeft + 1; + } else { + xPassDstBounds.fRight = std::min(xPassDstBounds.fRight, rightSrcEdge); + } + } + } + dstSDC = convolve_gaussian(rContext, + std::move(srcView), + srcColorType, + srcAlphaType, + srcBounds, + xPassDstBounds, + Direction::kX, + radiusX, + sigmaX, + mode, + colorSpace, + xFit); + if (!dstSDC) { + return nullptr; + } + srcView = dstSDC->readSurfaceView(); + SkIVector newDstBoundsOffset = dstBounds.topLeft() - xPassDstBounds.topLeft(); + dstBounds = SkIRect::MakeSize(dstBounds.size()).makeOffset(newDstBoundsOffset); + srcBounds = SkIRect::MakeSize(xPassDstBounds.size()); + } + + if (!radiusY) { + return dstSDC; + } + + return convolve_gaussian(rContext, + std::move(srcView), + srcColorType, + srcAlphaType, + srcBounds, + dstBounds, + Direction::kY, + radiusY, + sigmaY, + mode, + colorSpace, + fit); +} + +namespace SkGpuBlurUtils { + +std::unique_ptr GaussianBlur(GrRecordingContext* rContext, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + sk_sp colorSpace, + SkIRect dstBounds, + SkIRect srcBounds, + float sigmaX, + float sigmaY, + SkTileMode mode, + SkBackingFit fit) { + SkASSERT(rContext); + TRACE_EVENT2("skia.gpu", "GaussianBlur", "sigmaX", sigmaX, "sigmaY", sigmaY); + + if (!srcView.asTextureProxy()) { + return nullptr; + } + + int maxRenderTargetSize = rContext->priv().caps()->maxRenderTargetSize(); + if (dstBounds.width() > maxRenderTargetSize || dstBounds.height() > maxRenderTargetSize) { + return nullptr; + } + + int radiusX = SigmaRadius(sigmaX); + int radiusY = SigmaRadius(sigmaY); + // Attempt to reduce the srcBounds in order to detect that we can set the sigmas to zero or + // to reduce the amount of work to rescale the source if sigmas are large. TODO: Could consider + // how to minimize the required source bounds for repeat/mirror modes. + if (mode == SkTileMode::kClamp || mode == SkTileMode::kDecal) { + SkIRect reach = dstBounds.makeOutset(radiusX, radiusY); + SkIRect intersection; + if (!intersection.intersect(reach, srcBounds)) { + if (mode == SkTileMode::kDecal) { + return nullptr; + } else { + if (reach.fLeft >= srcBounds.fRight) { + srcBounds.fLeft = srcBounds.fRight - 1; + } else if (reach.fRight <= srcBounds.fLeft) { + srcBounds.fRight = srcBounds.fLeft + 1; + } + if (reach.fTop >= srcBounds.fBottom) { + srcBounds.fTop = srcBounds.fBottom - 1; + } else if (reach.fBottom <= srcBounds.fTop) { + srcBounds.fBottom = srcBounds.fTop + 1; + } + } + } else { + srcBounds = intersection; + } + } + + if (mode != SkTileMode::kDecal) { + // All non-decal tile modes are equivalent for one pixel width/height src and amount to a + // single color value repeated at each column/row. Applying the normalized kernel to that + // column/row yields that same color. So no blurring is necessary. + if (srcBounds.width() == 1) { + sigmaX = 0.f; + radiusX = 0; + } + if (srcBounds.height() == 1) { + sigmaY = 0.f; + radiusY = 0; + } + } + + // If we determined that there is no blurring necessary in either direction then just do a + // a draw that applies the tile mode. + if (!radiusX && !radiusY) { + // Create the sdc with default SkSurfaceProps. Gaussian blurs will soon use a + // SurfaceFillContext, at which point the SkSurfaceProps won't exist anymore. + auto result = + skgpu::ganesh::SurfaceDrawContext::Make(rContext, + srcColorType, + std::move(colorSpace), + fit, + dstBounds.size(), + SkSurfaceProps(), + /*label=*/"SurfaceDrawContext_GaussianBlur", + 1, + GrMipmapped::kNo, + srcView.proxy()->isProtected(), + srcView.origin()); + if (!result) { + return nullptr; + } + GrSamplerState sampler(SkTileModeToWrapMode(mode), GrSamplerState::Filter::kNearest); + auto fp = GrTextureEffect::MakeSubset(std::move(srcView), + srcAlphaType, + SkMatrix::I(), + sampler, + SkRect::Make(srcBounds), + SkRect::Make(dstBounds), + *rContext->priv().caps()); + result->fillRectToRectWithFP(dstBounds, SkIRect::MakeSize(dstBounds.size()), std::move(fp)); + return result; + } + + if (sigmaX <= kMaxSigma && sigmaY <= kMaxSigma) { + SkASSERT(radiusX <= GrGaussianConvolutionFragmentProcessor::kMaxKernelRadius); + SkASSERT(radiusY <= GrGaussianConvolutionFragmentProcessor::kMaxKernelRadius); + // For really small blurs (certainly no wider than 5x5 on desktop GPUs) it is faster to just + // launch a single non separable kernel vs two launches. + const int kernelSize = (2 * radiusX + 1) * (2 * radiusY + 1); + if (radiusX > 0 && radiusY > 0 && + kernelSize <= GrMatrixConvolutionEffect::kMaxUniformSize && + !rContext->priv().caps()->reducedShaderMode()) { + // Apply the proxy offset to src bounds and offset directly + return convolve_gaussian_2d(rContext, + std::move(srcView), + srcColorType, + srcBounds, + dstBounds, + radiusX, + radiusY, + sigmaX, + sigmaY, + mode, + std::move(colorSpace), + fit); + } + // This will automatically degenerate into a single pass of X or Y if only one of the + // radii are non-zero. + return two_pass_gaussian(rContext, + std::move(srcView), + srcColorType, + srcAlphaType, + std::move(colorSpace), + srcBounds, + dstBounds, + sigmaX, + sigmaY, + radiusX, + radiusY, + mode, + fit); + } + + GrColorInfo colorInfo(srcColorType, srcAlphaType, colorSpace); + auto srcCtx = rContext->priv().makeSC(srcView, colorInfo); + SkASSERT(srcCtx); + + float scaleX = sigmaX > kMaxSigma ? kMaxSigma / sigmaX : 1.f; + float scaleY = sigmaY > kMaxSigma ? kMaxSigma / sigmaY : 1.f; + // We round down here so that when we recalculate sigmas we know they will be below + // kMaxSigma (but clamp to 1 do we don't have an empty texture). + SkISize rescaledSize = {std::max(sk_float_floor2int(srcBounds.width() * scaleX), 1), + std::max(sk_float_floor2int(srcBounds.height() * scaleY), 1)}; + // Compute the sigmas using the actual scale factors used once we integerized the + // rescaledSize. + scaleX = static_cast(rescaledSize.width()) / srcBounds.width(); + scaleY = static_cast(rescaledSize.height()) / srcBounds.height(); + sigmaX *= scaleX; + sigmaY *= scaleY; + + // When we are in clamp mode any artifacts in the edge pixels due to downscaling may be + // exacerbated because of the tile mode. The particularly egregious case is when the original + // image has transparent black around the edges and the downscaling pulls in some non-zero + // values from the interior. Ultimately it'd be better for performance if the calling code could + // give us extra context around the blur to account for this. We don't currently have a good way + // to communicate this up stack. So we leave a 1 pixel border around the rescaled src bounds. + // We populate the top 1 pixel tall row of this border by rescaling the top row of the original + // source bounds into it. Because this is only rescaling in x (i.e. rescaling a 1 pixel high + // row into a shorter but still 1 pixel high row) we won't read any interior values. And similar + // for the other three borders. We'll adjust the source/dest bounds rescaled blur so that this + // border of extra pixels is used as the edge pixels for clamp mode but the dest bounds + // corresponds only to the pixels inside the border (the normally rescaled pixels inside this + // border). + // Moreover, if we clamped the rescaled size to 1 column or row then we still have a sigma + // that is greater than kMaxSigma. By using a pad and making the src 3 wide/tall instead of + // 1 we can recurse again and do another downscale. Since mirror and repeat modes are trivial + // for a single col/row we only add padding based on sigma exceeding kMaxSigma for decal. + int padX = mode == SkTileMode::kClamp || (mode == SkTileMode::kDecal && sigmaX > kMaxSigma) ? 1 + : 0; + int padY = mode == SkTileMode::kClamp || (mode == SkTileMode::kDecal && sigmaY > kMaxSigma) ? 1 + : 0; + // Create the sdc with default SkSurfaceProps. Gaussian blurs will soon use a + // SurfaceFillContext, at which point the SkSurfaceProps won't exist anymore. + auto rescaledSDC = skgpu::ganesh::SurfaceDrawContext::Make( + srcCtx->recordingContext(), + colorInfo.colorType(), + colorInfo.refColorSpace(), + SkBackingFit::kApprox, + {rescaledSize.width() + 2 * padX, rescaledSize.height() + 2 * padY}, + SkSurfaceProps(), + /*label=*/"RescaledSurfaceDrawContext", + 1, + GrMipmapped::kNo, + srcCtx->asSurfaceProxy()->isProtected(), + srcCtx->origin()); + if (!rescaledSDC) { + return nullptr; + } + if ((padX || padY) && mode == SkTileMode::kDecal) { + rescaledSDC->clear(SkPMColor4f{0, 0, 0, 0}); + } + if (!srcCtx->rescaleInto(rescaledSDC.get(), + SkIRect::MakeSize(rescaledSize).makeOffset(padX, padY), + srcBounds, + SkSurface::RescaleGamma::kSrc, + SkSurface::RescaleMode::kRepeatedLinear)) { + return nullptr; + } + if (mode == SkTileMode::kClamp) { + SkASSERT(padX == 1 && padY == 1); + // Rather than run a potentially multi-pass rescaler on single rows/columns we just do a + // single bilerp draw. If we find this quality unacceptable we should think more about how + // to rescale these with better quality but without 4 separate multi-pass downscales. + auto cheapDownscale = [&](SkIRect dstRect, SkIRect srcRect) { + rescaledSDC->drawTexture(nullptr, + srcCtx->readSurfaceView(), + srcAlphaType, + GrSamplerState::Filter::kLinear, + GrSamplerState::MipmapMode::kNone, + SkBlendMode::kSrc, + SK_PMColor4fWHITE, + SkRect::Make(srcRect), + SkRect::Make(dstRect), + GrQuadAAFlags::kNone, + SkCanvas::SrcRectConstraint::kFast_SrcRectConstraint, + SkMatrix::I(), + nullptr); + }; + auto [dw, dh] = rescaledSize; + // The are the src rows and columns from the source that we will scale into the dst padding. + float sLCol = srcBounds.left(); + float sTRow = srcBounds.top(); + float sRCol = srcBounds.right() - 1; + float sBRow = srcBounds.bottom() - 1; + + int sx = srcBounds.left(); + int sy = srcBounds.top(); + int sw = srcBounds.width(); + int sh = srcBounds.height(); + + // Downscale the edges from the original source. These draws should batch together (and with + // the above interior rescaling when it is a single pass). + cheapDownscale(SkIRect::MakeXYWH(0, 1, 1, dh), SkIRect::MakeXYWH(sLCol, sy, 1, sh)); + cheapDownscale(SkIRect::MakeXYWH(1, 0, dw, 1), SkIRect::MakeXYWH(sx, sTRow, sw, 1)); + cheapDownscale(SkIRect::MakeXYWH(dw + 1, 1, 1, dh), SkIRect::MakeXYWH(sRCol, sy, 1, sh)); + cheapDownscale(SkIRect::MakeXYWH(1, dh + 1, dw, 1), SkIRect::MakeXYWH(sx, sBRow, sw, 1)); + + // Copy the corners from the original source. These would batch with the edges except that + // at time of writing we recognize these can use kNearest and downgrade the filter. So they + // batch with each other but not the edge draws. + cheapDownscale(SkIRect::MakeXYWH(0, 0, 1, 1), SkIRect::MakeXYWH(sLCol, sTRow, 1, 1)); + cheapDownscale(SkIRect::MakeXYWH(dw + 1, 0, 1, 1), SkIRect::MakeXYWH(sRCol, sTRow, 1, 1)); + cheapDownscale(SkIRect::MakeXYWH(dw + 1, dh + 1, 1, 1), + SkIRect::MakeXYWH(sRCol, sBRow, 1, 1)); + cheapDownscale(SkIRect::MakeXYWH(0, dh + 1, 1, 1), SkIRect::MakeXYWH(sLCol, sBRow, 1, 1)); + } + srcView = rescaledSDC->readSurfaceView(); + // Drop the contexts so we don't hold the proxies longer than necessary. + rescaledSDC.reset(); + srcCtx.reset(); + + // Compute the dst bounds in the scaled down space. First move the origin to be at the top + // left since we trimmed off everything above and to the left of the original src bounds during + // the rescale. + SkRect scaledDstBounds = SkRect::Make(dstBounds.makeOffset(-srcBounds.topLeft())); + scaledDstBounds.fLeft *= scaleX; + scaledDstBounds.fTop *= scaleY; + scaledDstBounds.fRight *= scaleX; + scaledDstBounds.fBottom *= scaleY; + // Account for padding in our rescaled src, if any. + scaledDstBounds.offset(padX, padY); + // Turn the scaled down dst bounds into an integer pixel rect. + auto scaledDstBoundsI = scaledDstBounds.roundOut(); + + SkIRect scaledSrcBounds = SkIRect::MakeSize(srcView.dimensions()); + auto sdc = GaussianBlur(rContext, + std::move(srcView), + srcColorType, + srcAlphaType, + colorSpace, + scaledDstBoundsI, + scaledSrcBounds, + sigmaX, + sigmaY, + mode, + fit); + if (!sdc) { + return nullptr; + } + // We rounded out the integer scaled dst bounds. Select the fractional dst bounds from the + // integer dimension blurred result when we scale back up. + scaledDstBounds.offset(-scaledDstBoundsI.left(), -scaledDstBoundsI.top()); + return reexpand(rContext, + std::move(sdc), + scaledDstBounds, + dstBounds.size(), + std::move(colorSpace), + fit); +} + +bool ComputeBlurredRRectParams(const SkRRect& srcRRect, + const SkRRect& devRRect, + SkScalar sigma, + SkScalar xformedSigma, + SkRRect* rrectToDraw, + SkISize* widthHeight, + SkScalar rectXs[kBlurRRectMaxDivisions], + SkScalar rectYs[kBlurRRectMaxDivisions], + SkScalar texXs[kBlurRRectMaxDivisions], + SkScalar texYs[kBlurRRectMaxDivisions]) { + unsigned int devBlurRadius = 3 * SkScalarCeilToInt(xformedSigma - 1 / 6.0f); + SkScalar srcBlurRadius = 3.0f * sigma; + + const SkRect& devOrig = devRRect.getBounds(); + const SkVector& devRadiiUL = devRRect.radii(SkRRect::kUpperLeft_Corner); + const SkVector& devRadiiUR = devRRect.radii(SkRRect::kUpperRight_Corner); + const SkVector& devRadiiLR = devRRect.radii(SkRRect::kLowerRight_Corner); + const SkVector& devRadiiLL = devRRect.radii(SkRRect::kLowerLeft_Corner); + + const int devLeft = SkScalarCeilToInt(std::max(devRadiiUL.fX, devRadiiLL.fX)); + const int devTop = SkScalarCeilToInt(std::max(devRadiiUL.fY, devRadiiUR.fY)); + const int devRight = SkScalarCeilToInt(std::max(devRadiiUR.fX, devRadiiLR.fX)); + const int devBot = SkScalarCeilToInt(std::max(devRadiiLL.fY, devRadiiLR.fY)); + + // This is a conservative check for nine-patchability + if (devOrig.fLeft + devLeft + devBlurRadius >= devOrig.fRight - devRight - devBlurRadius || + devOrig.fTop + devTop + devBlurRadius >= devOrig.fBottom - devBot - devBlurRadius) { + return false; + } + + const SkVector& srcRadiiUL = srcRRect.radii(SkRRect::kUpperLeft_Corner); + const SkVector& srcRadiiUR = srcRRect.radii(SkRRect::kUpperRight_Corner); + const SkVector& srcRadiiLR = srcRRect.radii(SkRRect::kLowerRight_Corner); + const SkVector& srcRadiiLL = srcRRect.radii(SkRRect::kLowerLeft_Corner); + + const SkScalar srcLeft = std::max(srcRadiiUL.fX, srcRadiiLL.fX); + const SkScalar srcTop = std::max(srcRadiiUL.fY, srcRadiiUR.fY); + const SkScalar srcRight = std::max(srcRadiiUR.fX, srcRadiiLR.fX); + const SkScalar srcBot = std::max(srcRadiiLL.fY, srcRadiiLR.fY); + + int newRRWidth = 2 * devBlurRadius + devLeft + devRight + 1; + int newRRHeight = 2 * devBlurRadius + devTop + devBot + 1; + widthHeight->fWidth = newRRWidth + 2 * devBlurRadius; + widthHeight->fHeight = newRRHeight + 2 * devBlurRadius; + + const SkRect srcProxyRect = srcRRect.getBounds().makeOutset(srcBlurRadius, srcBlurRadius); + + rectXs[0] = srcProxyRect.fLeft; + rectXs[1] = srcProxyRect.fLeft + 2 * srcBlurRadius + srcLeft; + rectXs[2] = srcProxyRect.fRight - 2 * srcBlurRadius - srcRight; + rectXs[3] = srcProxyRect.fRight; + + rectYs[0] = srcProxyRect.fTop; + rectYs[1] = srcProxyRect.fTop + 2 * srcBlurRadius + srcTop; + rectYs[2] = srcProxyRect.fBottom - 2 * srcBlurRadius - srcBot; + rectYs[3] = srcProxyRect.fBottom; + + texXs[0] = 0.0f; + texXs[1] = 2.0f * devBlurRadius + devLeft; + texXs[2] = 2.0f * devBlurRadius + devLeft + 1; + texXs[3] = SkIntToScalar(widthHeight->fWidth); + + texYs[0] = 0.0f; + texYs[1] = 2.0f * devBlurRadius + devTop; + texYs[2] = 2.0f * devBlurRadius + devTop + 1; + texYs[3] = SkIntToScalar(widthHeight->fHeight); + + const SkRect newRect = SkRect::MakeXYWH(SkIntToScalar(devBlurRadius), + SkIntToScalar(devBlurRadius), + SkIntToScalar(newRRWidth), + SkIntToScalar(newRRHeight)); + SkVector newRadii[4]; + newRadii[0] = {SkScalarCeilToScalar(devRadiiUL.fX), SkScalarCeilToScalar(devRadiiUL.fY)}; + newRadii[1] = {SkScalarCeilToScalar(devRadiiUR.fX), SkScalarCeilToScalar(devRadiiUR.fY)}; + newRadii[2] = {SkScalarCeilToScalar(devRadiiLR.fX), SkScalarCeilToScalar(devRadiiLR.fY)}; + newRadii[3] = {SkScalarCeilToScalar(devRadiiLL.fX), SkScalarCeilToScalar(devRadiiLL.fY)}; + + rrectToDraw->setRectRadii(newRect, newRadii); + return true; +} + +// TODO: it seems like there should be some synergy with SkBlurMask::ComputeBlurProfile +// TODO: maybe cache this on the cpu side? +int CreateIntegralTable(float sixSigma, SkBitmap* table) { + // Check for NaN + if (sk_float_isnan(sixSigma)) { + return 0; + } + // Avoid overflow, covers both multiplying by 2 and finding next power of 2: + // 2*((2^31-1)/4 + 1) = 2*(2^29-1) + 2 = 2^30 and SkNextPow2(2^30) = 2^30 + if (sixSigma > SK_MaxS32/4 + 1) { + return 0; + } + // The texture we're producing represents the integral of a normal distribution over a + // six-sigma range centered at zero. We want enough resolution so that the linear + // interpolation done in texture lookup doesn't introduce noticeable artifacts. We + // conservatively choose to have 2 texels for each dst pixel. + int minWidth = 2*((int)sk_float_ceil(sixSigma)); + // Bin by powers of 2 with a minimum so we get good profile reuse. + int width = std::max(SkNextPow2(minWidth), 32); + + if (!table) { + return width; + } + + if (!table->tryAllocPixels(SkImageInfo::MakeA8(width, 1))) { + return 0; + } + *table->getAddr8(0, 0) = 255; + const float invWidth = 1.f / width; + for (int i = 1; i < width - 1; ++i) { + float x = (i + 0.5f) * invWidth; + x = (-6 * x + 3) * SK_ScalarRoot2Over2; + float integral = 0.5f * (std::erf(x) + 1.f); + *table->getAddr8(i, 0) = SkToU8(sk_float_round2int(255.f * integral)); + } + + *table->getAddr8(width - 1, 0) = 0; + table->setImmutable(); + return table->width(); +} + +void Compute1DGaussianKernel(float* kernel, float sigma, int radius) { + SkASSERT(radius == SigmaRadius(sigma)); + if (SkGpuBlurUtils::IsEffectivelyZeroSigma(sigma)) { + // Calling SigmaRadius() produces 1, just computing ceil(sigma)*3 produces 3 + SkASSERT(KernelWidth(radius) == 1); + std::fill_n(kernel, 1, 0.f); + kernel[0] = 1.f; + return; + } + + // If this fails, kEffectivelyZeroSigma isn't big enough to prevent precision issues + SkASSERT(!SkScalarNearlyZero(2.f * sigma * sigma)); + + const float sigmaDenom = 1.0f / (2.f * sigma * sigma); + int size = KernelWidth(radius); + float sum = 0.0f; + for (int i = 0; i < size; ++i) { + float term = static_cast(i - radius); + // Note that the constant term (1/(sqrt(2*pi*sigma^2)) of the Gaussian + // is dropped here, since we renormalize the kernel below. + kernel[i] = sk_float_exp(-term * term * sigmaDenom); + sum += kernel[i]; + } + // Normalize the kernel + float scale = 1.0f / sum; + for (int i = 0; i < size; ++i) { + kernel[i] *= scale; + } +} + +void Compute1DLinearGaussianKernel(float* kernel, float* offset, float sigma, int radius) { + // Given 2 adjacent gaussian points, they are blended as: Wi * Ci + Wj * Cj. + // The GPU will mix Ci and Cj as Ci * (1 - x) + Cj * x during sampling. + // Compute W', x such that W' * (Ci * (1 - x) + Cj * x) = Wi * Ci + Wj * Cj. + // Solving W' * x = Wj, W' * (1 - x) = Wi: + // W' = Wi + Wj + // x = Wj / (Wi + Wj) + auto get_new_weight = [](float* new_w, float* offset, float wi, float wj) { + *new_w = wi + wj; + *offset = wj / (wi + wj); + }; + + // Create a temporary standard kernel. + int size = KernelWidth(radius); + std::unique_ptr temp_kernel(new float[size]); + Compute1DGaussianKernel(temp_kernel.get(), sigma, radius); + + // Note that halfsize isn't just size / 2, but radius + 1. This is the size of the output array. + int halfsize = LinearKernelWidth(radius); + int halfradius = halfsize / 2; + int low_index = halfradius - 1; + + // Compute1DGaussianKernel produces a full 2N + 1 kernel. Since the kernel can be mirrored, + // compute only the upper half and mirror to the lower half. + + int index = radius; + if (radius & 1) { + // If N is odd, then use two samples. + // The centre texel gets sampled twice, so halve its influence for each sample. + // We essentially sample like this: + // Texel edges + // v v v v + // | | | | + // \-----^---/ Lower sample + // \---^-----/ Upper sample + get_new_weight(&kernel[halfradius], + &offset[halfradius], + temp_kernel[index] * 0.5f, + temp_kernel[index + 1]); + kernel[low_index] = kernel[halfradius]; + offset[low_index] = -offset[halfradius]; + index++; + low_index--; + } else { + // If N is even, then there are an even number of texels on either side of the centre texel. + // Sample the centre texel directly. + kernel[halfradius] = temp_kernel[index]; + offset[halfradius] = 0.0f; + } + index++; + + // Every other pair gets one sample. + for (int i = halfradius + 1; i < halfsize; index += 2, i++, low_index--) { + get_new_weight(&kernel[i], &offset[i], temp_kernel[index], temp_kernel[index + 1]); + offset[i] += static_cast(index - radius); + + // Mirror to lower half. + kernel[low_index] = kernel[i]; + offset[low_index] = -offset[i]; + } +} + +} // namespace SkGpuBlurUtils + +#endif // defined(SK_GANESH) diff --git a/gfx/skia/skia/src/core/SkGpuBlurUtils.h b/gfx/skia/skia/src/core/SkGpuBlurUtils.h new file mode 100644 index 0000000000..c16f20e29c --- /dev/null +++ b/gfx/skia/skia/src/core/SkGpuBlurUtils.h @@ -0,0 +1,113 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGpuBlurUtils_DEFINED +#define SkGpuBlurUtils_DEFINED + +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) +#include "include/core/SkRefCnt.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/gpu/SkBackingFit.h" + +class GrRecordingContext; +namespace skgpu { +namespace ganesh { +class SurfaceDrawContext; +} +} // namespace skgpu +class GrSurfaceProxyView; +class GrTexture; + +class SkBitmap; +enum class SkTileMode; +struct SkRect; + +namespace SkGpuBlurUtils { + +/** Maximum sigma before the implementation downscales the input image. */ +static constexpr float kMaxSigma = 4.f; + +/** + * Applies a 2D Gaussian blur to a given texture. The blurred result is returned + * as a surfaceDrawContext in case the caller wishes to draw into the result. + * The GrSurfaceOrigin of the result will watch the GrSurfaceOrigin of srcView. The output + * color type, color space, and alpha type will be the same as the src. + * + * Note: one of sigmaX and sigmaY should be non-zero! + * @param context The GPU context + * @param srcView The source to be blurred. + * @param srcColorType The colorType of srcProxy + * @param srcAlphaType The alphaType of srcProxy + * @param srcColorSpace Color space of the source. + * @param dstBounds The destination bounds, relative to the source texture. + * @param srcBounds The source bounds, relative to the source texture's offset. No pixels + * will be sampled outside of this rectangle. + * @param sigmaX The blur's standard deviation in X. + * @param sigmaY The blur's standard deviation in Y. + * @param tileMode The mode to handle samples outside bounds. + * @param fit backing fit for the returned render target context + * @return The surfaceDrawContext containing the blurred result. + */ +std::unique_ptr GaussianBlur( + GrRecordingContext*, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + sk_sp srcColorSpace, + SkIRect dstBounds, + SkIRect srcBounds, + float sigmaX, + float sigmaY, + SkTileMode mode, + SkBackingFit fit = SkBackingFit::kApprox); + +static const int kBlurRRectMaxDivisions = 6; + +// This method computes all the parameters for drawing a partially occluded nine-patched +// blurred rrect mask: +// rrectToDraw - the integerized rrect to draw in the mask +// widthHeight - how large to make the mask (rrectToDraw will be centered in this coord sys) +// rectXs, rectYs - the x & y coordinates of the covering geometry lattice +// texXs, texYs - the texture coordinate at each point in rectXs & rectYs +// It returns true if 'devRRect' is nine-patchable +bool ComputeBlurredRRectParams(const SkRRect& srcRRect, + const SkRRect& devRRect, + SkScalar sigma, + SkScalar xformedSigma, + SkRRect* rrectToDraw, + SkISize* widthHeight, + SkScalar rectXs[kBlurRRectMaxDivisions], + SkScalar rectYs[kBlurRRectMaxDivisions], + SkScalar texXs[kBlurRRectMaxDivisions], + SkScalar texYs[kBlurRRectMaxDivisions]); + +int CreateIntegralTable(float sixSigma, SkBitmap* table); + +void Compute1DGaussianKernel(float* kernel, float sigma, int radius); + +void Compute1DLinearGaussianKernel(float* kernel, float* offset, float sigma, int radius); + +// Any sigmas smaller than this are effectively an identity blur so can skip convolution at a higher +// level. The value was chosen because it corresponds roughly to a radius of 1/10px, and is slightly +// greater than sqrt(1/2*sigma^2) for SK_ScalarNearlyZero. +inline bool IsEffectivelyZeroSigma(float sigma) { return sigma <= 0.03f; } + +inline int SigmaRadius(float sigma) { + return IsEffectivelyZeroSigma(sigma) ? 0 : static_cast(ceilf(sigma * 3.0f)); +} + +inline int KernelWidth(int radius) { return 2 * radius + 1; } + +inline int LinearKernelWidth(int radius) { return radius + 1; } + +} // namespace SkGpuBlurUtils + +#endif // defined(SK_GANESH) + +#endif diff --git a/gfx/skia/skia/src/core/SkGraphics.cpp b/gfx/skia/skia/src/core/SkGraphics.cpp new file mode 100644 index 0000000000..46a6355413 --- /dev/null +++ b/gfx/skia/skia/src/core/SkGraphics.cpp @@ -0,0 +1,100 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkGraphics.h" + +#include "include/core/SkCanvas.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkOpenTypeSVGDecoder.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkShader.h" +#include "include/core/SkStream.h" +#include "include/core/SkTime.h" +#include "include/private/base/SkMath.h" +#include "src/base/SkTSearch.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkCpu.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkOpts.h" +#include "src/core/SkResourceCache.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkTypefaceCache.h" + +#include + +void SkGraphics::Init() { + // SkGraphics::Init() must be thread-safe and idempotent. + SkCpu::CacheRuntimeFeatures(); + SkOpts::Init(); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkGraphics::DumpMemoryStatistics(SkTraceMemoryDump* dump) { + SkResourceCache::DumpMemoryStatistics(dump); + SkStrikeCache::DumpMemoryStatistics(dump); +} + +void SkGraphics::PurgeAllCaches() { + SkGraphics::PurgeFontCache(); + SkGraphics::PurgeResourceCache(); + SkImageFilter_Base::PurgeCache(); +} + +/////////////////////////////////////////////////////////////////////////////// + +size_t SkGraphics::GetFontCacheLimit() { + return SkStrikeCache::GlobalStrikeCache()->getCacheSizeLimit(); +} + +size_t SkGraphics::SetFontCacheLimit(size_t bytes) { + return SkStrikeCache::GlobalStrikeCache()->setCacheSizeLimit(bytes); +} + +size_t SkGraphics::GetFontCacheUsed() { + return SkStrikeCache::GlobalStrikeCache()->getTotalMemoryUsed(); +} + +int SkGraphics::GetFontCacheCountLimit() { + return SkStrikeCache::GlobalStrikeCache()->getCacheCountLimit(); +} + +int SkGraphics::SetFontCacheCountLimit(int count) { + return SkStrikeCache::GlobalStrikeCache()->setCacheCountLimit(count); +} + +int SkGraphics::GetFontCacheCountUsed() { + return SkStrikeCache::GlobalStrikeCache()->getCacheCountUsed(); +} + +void SkGraphics::PurgeFontCache() { + SkStrikeCache::GlobalStrikeCache()->purgeAll(); + SkTypefaceCache::PurgeAll(); +} + +static SkGraphics::OpenTypeSVGDecoderFactory gSVGDecoderFactory = nullptr; + +SkGraphics::OpenTypeSVGDecoderFactory +SkGraphics::SetOpenTypeSVGDecoderFactory(OpenTypeSVGDecoderFactory svgDecoderFactory) { + OpenTypeSVGDecoderFactory old(gSVGDecoderFactory); + gSVGDecoderFactory = svgDecoderFactory; + return old; +} + +SkGraphics::OpenTypeSVGDecoderFactory SkGraphics::GetOpenTypeSVGDecoderFactory() { + return gSVGDecoderFactory; +} + +extern bool gSkVMAllowJIT; + +void SkGraphics::AllowJIT() { + gSkVMAllowJIT = true; +} diff --git a/gfx/skia/skia/src/core/SkIDChangeListener.cpp b/gfx/skia/skia/src/core/SkIDChangeListener.cpp new file mode 100644 index 0000000000..43c6a9530e --- /dev/null +++ b/gfx/skia/skia/src/core/SkIDChangeListener.cpp @@ -0,0 +1,70 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkIDChangeListener.h" + +/** + * Used to be notified when a gen/unique ID is invalidated, typically to preemptively purge + * associated items from a cache that are no longer reachable. The listener can + * be marked for deregistration if the cached item is remove before the listener is + * triggered. This prevents unbounded listener growth when cache items are routinely + * removed before the gen ID/unique ID is invalidated. + */ + +SkIDChangeListener::SkIDChangeListener() : fShouldDeregister(false) {} + +SkIDChangeListener::~SkIDChangeListener() = default; + +using List = SkIDChangeListener::List; + +List::List() = default; + +List::~List() { + // We don't need the mutex. No other thread should have this list while it's being + // destroyed. + for (auto& listener : fListeners) { + if (!listener->shouldDeregister()) { + listener->changed(); + } + } +} + +void List::add(sk_sp listener) { + if (!listener) { + return; + } + SkASSERT(!listener->shouldDeregister()); + + SkAutoMutexExclusive lock(fMutex); + // Clean out any stale listeners before we append the new one. + for (int i = 0; i < fListeners.size(); ++i) { + if (fListeners[i]->shouldDeregister()) { + fListeners.removeShuffle(i--); // No need to preserve the order after i. + } + } + fListeners.push_back(std::move(listener)); +} + +int List::count() const { + SkAutoMutexExclusive lock(fMutex); + return fListeners.size(); +} + +void List::changed() { + SkAutoMutexExclusive lock(fMutex); + for (auto& listener : fListeners) { + if (!listener->shouldDeregister()) { + listener->changed(); + } + } + fListeners.clear(); +} + +void List::reset() { + SkAutoMutexExclusive lock(fMutex); + fListeners.clear(); +} diff --git a/gfx/skia/skia/src/core/SkIPoint16.h b/gfx/skia/skia/src/core/SkIPoint16.h new file mode 100644 index 0000000000..949ae2db3c --- /dev/null +++ b/gfx/skia/skia/src/core/SkIPoint16.h @@ -0,0 +1,57 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkIPoint16_DEFINED +#define SkIPoint16_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" + +/** \struct SkIPoint16 + SkIPoint16 holds two 16 bit integer coordinates. + */ +struct SkIPoint16 { + int16_t fX; //!< x-axis value used by SkIPoint16 + + int16_t fY; //!< y-axis value used by SkIPoint16 + + /** Sets fX to x, fY to y. If SK_DEBUG is defined, asserts + if x or y does not fit in 16 bits. + + @param x integer x-axis value of constructed SkIPoint + @param y integer y-axis value of constructed SkIPoint + @return SkIPoint16 (x, y) + */ + static constexpr SkIPoint16 Make(int x, int y) { + return {SkToS16(x), SkToS16(y)}; + } + + /** Returns x-axis value of SkIPoint16. + + @return fX + */ + int16_t x() const { return fX; } + + /** Returns y-axis value of SkIPoint. + + @return fY + */ + int16_t y() const { return fY; } + + /** Sets fX to x and fY to y. + + @param x new value for fX + @param y new value for fY + */ + void set(int x, int y) { + fX = SkToS16(x); + fY = SkToS16(y); + } +}; + +#endif + diff --git a/gfx/skia/skia/src/core/SkImageFilter.cpp b/gfx/skia/skia/src/core/SkImageFilter.cpp new file mode 100644 index 0000000000..67740fcfde --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageFilter.cpp @@ -0,0 +1,682 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImageFilter.h" + +#include "include/core/SkCanvas.h" +#include "include/core/SkRect.h" +#include "include/private/base/SkSafe32.h" +#include "src/core/SkFuzzLogging.h" +#include "src/core/SkImageFilterCache.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkLocalMatrixImageFilter.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkValidationUtils.h" +#include "src/core/SkWriteBuffer.h" +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#endif +#include + +/////////////////////////////////////////////////////////////////////////////////////////////////// +// SkImageFilter - A number of the public APIs on SkImageFilter downcast to SkImageFilter_Base +// in order to perform their actual work. +/////////////////////////////////////////////////////////////////////////////////////////////////// + +/** + * Returns the number of inputs this filter will accept (some inputs can + * be NULL). + */ +int SkImageFilter::countInputs() const { return as_IFB(this)->fInputs.count(); } + +/** + * Returns the input filter at a given index, or NULL if no input is + * connected. The indices used are filter-specific. + */ +const SkImageFilter* SkImageFilter::getInput(int i) const { + SkASSERT(i < this->countInputs()); + return as_IFB(this)->fInputs[i].get(); +} + +bool SkImageFilter::isColorFilterNode(SkColorFilter** filterPtr) const { + return as_IFB(this)->onIsColorFilterNode(filterPtr); +} + +SkIRect SkImageFilter::filterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection direction, const SkIRect* inputRect) const { + // The old filterBounds() function uses SkIRects that are defined in layer space so, while + // we still are supporting it, bypass SkIF_B's new public filter bounds functions and go right + // to the internal layer-space calculations. + skif::Mapping mapping{ctm}; + if (kReverse_MapDirection == direction) { + skif::LayerSpace targetOutput(src); + if (as_IFB(this)->cropRectIsSet()) { + skif::LayerSpace outputCrop = mapping.paramToLayer( + skif::ParameterSpace(as_IFB(this)->getCropRect().rect())).roundOut(); + // Just intersect directly; unlike the forward-mapping case, since we start with the + // external target output, there's no need to embiggen due to affecting trans. black + if (!targetOutput.intersect(outputCrop)) { + // Nothing would be output by the filter, so return empty rect + return SkIRect::MakeEmpty(); + } + } + skif::LayerSpace content(inputRect ? *inputRect : src); + return SkIRect(as_IFB(this)->onGetInputLayerBounds(mapping, targetOutput, content)); + } else { + SkASSERT(!inputRect); + skif::LayerSpace content(src); + skif::LayerSpace output = as_IFB(this)->onGetOutputLayerBounds(mapping, content); + // Manually apply the crop rect for now, until cropping is performed by a dedicated SkIF. + SkIRect dst; + as_IFB(this)->getCropRect().applyTo( + SkIRect(output), ctm, as_IFB(this)->onAffectsTransparentBlack(), &dst); + return dst; + } +} + +SkRect SkImageFilter::computeFastBounds(const SkRect& src) const { + if (0 == this->countInputs()) { + return src; + } + SkRect combinedBounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src; + for (int i = 1; i < this->countInputs(); i++) { + const SkImageFilter* input = this->getInput(i); + if (input) { + combinedBounds.join(input->computeFastBounds(src)); + } else { + combinedBounds.join(src); + } + } + return combinedBounds; +} + +bool SkImageFilter::canComputeFastBounds() const { + return !as_IFB(this)->affectsTransparentBlack(); +} + +bool SkImageFilter_Base::affectsTransparentBlack() const { + if (this->onAffectsTransparentBlack()) { + return true; + } + for (int i = 0; i < this->countInputs(); i++) { + const SkImageFilter* input = this->getInput(i); + if (input && as_IFB(input)->affectsTransparentBlack()) { + return true; + } + } + return false; +} + +bool SkImageFilter::asAColorFilter(SkColorFilter** filterPtr) const { + SkASSERT(nullptr != filterPtr); + if (!this->isColorFilterNode(filterPtr)) { + return false; + } + if (nullptr != this->getInput(0) || as_CFB(*filterPtr)->affectsTransparentBlack()) { + (*filterPtr)->unref(); + return false; + } + return true; +} + +sk_sp SkImageFilter::makeWithLocalMatrix(const SkMatrix& matrix) const { + return SkLocalMatrixImageFilter::Make(matrix, this->refMe()); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// +// SkImageFilter_Base +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static int32_t next_image_filter_unique_id() { + static std::atomic nextID{1}; + + int32_t id; + do { + id = nextID.fetch_add(1, std::memory_order_relaxed); + } while (id == 0); + return id; +} + +SkImageFilter_Base::SkImageFilter_Base(sk_sp const* inputs, + int inputCount, const SkRect* cropRect) + : fUsesSrcInput(false) + , fCropRect(cropRect) + , fUniqueID(next_image_filter_unique_id()) { + fInputs.reset(inputCount); + + for (int i = 0; i < inputCount; ++i) { + if (!inputs[i] || as_IFB(inputs[i])->fUsesSrcInput) { + fUsesSrcInput = true; + } + fInputs[i] = inputs[i]; + } +} + +SkImageFilter_Base::~SkImageFilter_Base() { + SkImageFilterCache::Get()->purgeByImageFilter(this); +} + +bool SkImageFilter_Base::Common::unflatten(SkReadBuffer& buffer, int expectedCount) { + const int count = buffer.readInt(); + if (!buffer.validate(count >= 0)) { + return false; + } + if (!buffer.validate(expectedCount < 0 || count == expectedCount)) { + return false; + } + +#if defined(SK_BUILD_FOR_FUZZER) + if (count > 4) { + return false; + } +#endif + + SkASSERT(fInputs.empty()); + for (int i = 0; i < count; i++) { + fInputs.push_back(buffer.readBool() ? buffer.readImageFilter() : nullptr); + if (!buffer.isValid()) { + return false; + } + } + SkRect rect; + buffer.readRect(&rect); + if (!buffer.isValid() || !buffer.validate(SkIsValidRect(rect))) { + return false; + } + + uint32_t flags = buffer.readUInt(); + if (!buffer.isValid() || + !buffer.validate(flags == 0x0 || flags == CropRect::kHasAll_CropEdge)) { + return false; + } + fCropRect = CropRect(flags ? &rect : nullptr); + return buffer.isValid(); +} + +void SkImageFilter_Base::flatten(SkWriteBuffer& buffer) const { + buffer.writeInt(fInputs.count()); + for (int i = 0; i < fInputs.count(); i++) { + const SkImageFilter* input = this->getInput(i); + buffer.writeBool(input != nullptr); + if (input != nullptr) { + buffer.writeFlattenable(input); + } + } + buffer.writeRect(fCropRect.rect()); + buffer.writeUInt(fCropRect.flags()); +} + +skif::FilterResult SkImageFilter_Base::filterImage(const skif::Context& context) const { + // TODO (michaelludwig) - Old filters have an implicit assumption that the source image + // (originally passed separately) has an origin of (0, 0). SkComposeImageFilter makes an effort + // to ensure that remains the case. Once everyone uses the new type systems for bounds, non + // (0, 0) source origins will be easy to support. + SkASSERT(context.source().layerBounds().left() == 0 && + context.source().layerBounds().top() == 0 && + context.source().layerBounds().right() == context.source().image()->width() && + context.source().layerBounds().bottom() == context.source().image()->height()); + + skif::FilterResult result; + if (context.desiredOutput().isEmpty() || !context.isValid()) { + return result; + } + + uint32_t srcGenID = fUsesSrcInput ? context.sourceImage()->uniqueID() : 0; + const SkIRect srcSubset = fUsesSrcInput ? context.sourceImage()->subset() + : SkIRect::MakeWH(0, 0); + + SkImageFilterCacheKey key(fUniqueID, context.mapping().layerMatrix(), context.clipBounds(), + srcGenID, srcSubset); + if (context.cache() && context.cache()->get(key, &result)) { + return result; + } + + result = this->onFilterImage(context); + + if (context.gpuBacked()) { + SkASSERT(!result.image() || result.image()->isTextureBacked()); + } + + if (context.cache()) { + context.cache()->set(key, this, result); + } + + return result; +} + +skif::LayerSpace SkImageFilter_Base::getInputBounds( + const skif::Mapping& mapping, const skif::DeviceSpace& desiredOutput, + const skif::ParameterSpace* knownContentBounds) const { + // Map both the device-space desired coverage area and the known content bounds to layer space + skif::LayerSpace desiredBounds = mapping.deviceToLayer(desiredOutput); + + // TODO (michaelludwig) - To be removed once cropping is its own filter, since then an output + // crop would automatically adjust the required input of its child filter in this same way. + if (this->cropRectIsSet()) { + skif::LayerSpace outputCrop = + mapping.paramToLayer(skif::ParameterSpace(fCropRect.rect())).roundOut(); + if (!desiredBounds.intersect(outputCrop)) { + // Nothing would be output by the filter, so return empty rect + return skif::LayerSpace(SkIRect::MakeEmpty()); + } + } + + // If we have no known content bounds use the desired coverage area, because that is the most + // conservative possibility. + skif::LayerSpace contentBounds = + knownContentBounds ? mapping.paramToLayer(*knownContentBounds).roundOut() + : desiredBounds; + + // Process the layer-space desired output with the filter DAG to determine required input + skif::LayerSpace requiredInput = this->onGetInputLayerBounds( + mapping, desiredBounds, contentBounds); + // If we know what's actually going to be drawn into the layer, and we don't change transparent + // black, then we can further restrict the layer to what the known content is + // TODO (michaelludwig) - This logic could be moved into visitInputLayerBounds() when an input + // filter is null. Additionally, once all filters are robust to FilterResults with tile modes, + // we can always restrict the required input by content bounds since any additional transparent + // black is handled when producing the output result and sampling outside the input image with + // a decal tile mode. + if (knownContentBounds && !this->affectsTransparentBlack()) { + if (!requiredInput.intersect(contentBounds)) { + // Nothing would be output by the filter, so return empty rect + return skif::LayerSpace(SkIRect::MakeEmpty()); + } + } + return requiredInput; +} + +skif::DeviceSpace SkImageFilter_Base::getOutputBounds( + const skif::Mapping& mapping, const skif::ParameterSpace& contentBounds) const { + // Map the input content into the layer space where filtering will occur + skif::LayerSpace layerContent = mapping.paramToLayer(contentBounds); + // Determine the filter DAGs output bounds in layer space + skif::LayerSpace filterOutput = this->onGetOutputLayerBounds( + mapping, layerContent.roundOut()); + // FIXME (michaelludwig) - To be removed once cropping is isolated, but remain consistent with + // old filterBounds(kForward) behavior. + SkIRect dst; + as_IFB(this)->getCropRect().applyTo( + SkIRect(filterOutput), mapping.layerMatrix(), + as_IFB(this)->onAffectsTransparentBlack(), &dst); + + // Map all the way to device space + return mapping.layerToDevice(skif::LayerSpace(dst)); +} + +// TODO (michaelludwig) - Default to using the old onFilterImage, as filters are updated one by one. +// Once the old function is gone, this onFilterImage() will be made a pure virtual. +skif::FilterResult SkImageFilter_Base::onFilterImage(const skif::Context& context) const { + SkIPoint origin = {0, 0}; + auto image = this->onFilterImage(context, &origin); + return skif::FilterResult(std::move(image), skif::LayerSpace(origin)); +} + +SkImageFilter_Base::MatrixCapability SkImageFilter_Base::getCTMCapability() const { + MatrixCapability result = this->onGetCTMCapability(); + // CropRects need to apply in the source coordinate system, but are not aware of complex CTMs + // when performing clipping. For a simple fix, any filter with a crop rect set cannot support + // more than scale+translate CTMs until that's updated. + if (this->cropRectIsSet()) { + result = std::min(result, MatrixCapability::kScaleTranslate); + } + const int count = this->countInputs(); + for (int i = 0; i < count; ++i) { + if (const SkImageFilter_Base* input = as_IFB(this->getInput(i))) { + result = std::min(result, input->getCTMCapability()); + } + } + return result; +} + +void SkImageFilter_Base::CropRect::applyTo(const SkIRect& imageBounds, const SkMatrix& ctm, + bool embiggen, SkIRect* cropped) const { + *cropped = imageBounds; + if (fFlags) { + SkRect devCropR; + ctm.mapRect(&devCropR, fRect); + SkIRect devICropR = devCropR.roundOut(); + + // Compute the left/top first, in case we need to modify the right/bottom for a missing edge + if (fFlags & kHasLeft_CropEdge) { + if (embiggen || devICropR.fLeft > cropped->fLeft) { + cropped->fLeft = devICropR.fLeft; + } + } else { + devICropR.fRight = Sk32_sat_add(cropped->fLeft, devICropR.width()); + } + if (fFlags & kHasTop_CropEdge) { + if (embiggen || devICropR.fTop > cropped->fTop) { + cropped->fTop = devICropR.fTop; + } + } else { + devICropR.fBottom = Sk32_sat_add(cropped->fTop, devICropR.height()); + } + if (fFlags & kHasWidth_CropEdge) { + if (embiggen || devICropR.fRight < cropped->fRight) { + cropped->fRight = devICropR.fRight; + } + } + if (fFlags & kHasHeight_CropEdge) { + if (embiggen || devICropR.fBottom < cropped->fBottom) { + cropped->fBottom = devICropR.fBottom; + } + } + } +} + +bool SkImageFilter_Base::applyCropRect(const Context& ctx, const SkIRect& srcBounds, + SkIRect* dstBounds) const { + SkIRect tmpDst = this->onFilterNodeBounds(srcBounds, ctx.ctm(), kForward_MapDirection, nullptr); + fCropRect.applyTo(tmpDst, ctx.ctm(), this->onAffectsTransparentBlack(), dstBounds); + // Intersect against the clip bounds, in case the crop rect has + // grown the bounds beyond the original clip. This can happen for + // example in tiling, where the clip is much smaller than the filtered + // primitive. If we didn't do this, we would be processing the filter + // at the full crop rect size in every tile. + return dstBounds->intersect(ctx.clipBounds()); +} + +// Return a larger (newWidth x newHeight) copy of 'src' with black padding +// around it. +static sk_sp pad_image(SkSpecialImage* src, const SkImageFilter_Base::Context& ctx, + int newWidth, int newHeight, int offX, int offY) { + // We would like to operate in the source's color space (so that we return an "identical" + // image, other than the padding. To achieve that, we'd create a new context using + // src->getColorSpace() to replace ctx.colorSpace(). + + // That fails in at least two ways. For formats that are texturable but not renderable (like + // F16 on some ES implementations), we can't create a surface to do the work. For sRGB, images + // may be tagged with an sRGB color space (which leads to an sRGB config in makeSurface). But + // the actual config of that sRGB image on a device with no sRGB support is non-sRGB. + // + // Rather than try to special case these situations, we execute the image padding in the + // destination color space. This should not affect the output of the DAG in (almost) any case, + // because the result of this call is going to be used as an input, where it would have been + // switched to the destination space anyway. The one exception would be a filter that expected + // to consume unclamped F16 data, but the padded version of the image is pre-clamped to 8888. + // We can revisit this logic if that ever becomes an actual problem. + sk_sp surf(ctx.makeSurface(SkISize::Make(newWidth, newHeight))); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + canvas->clear(0x0); + + src->draw(canvas, offX, offY); + + return surf->makeImageSnapshot(); +} + +sk_sp SkImageFilter_Base::applyCropRectAndPad(const Context& ctx, + SkSpecialImage* src, + SkIPoint* srcOffset, + SkIRect* bounds) const { + const SkIRect srcBounds = SkIRect::MakeXYWH(srcOffset->x(), srcOffset->y(), + src->width(), src->height()); + + if (!this->applyCropRect(ctx, srcBounds, bounds)) { + return nullptr; + } + + if (srcBounds.contains(*bounds)) { + return sk_sp(SkRef(src)); + } else { + sk_sp img(pad_image(src, ctx, bounds->width(), bounds->height(), + Sk32_sat_sub(srcOffset->x(), bounds->x()), + Sk32_sat_sub(srcOffset->y(), bounds->y()))); + *srcOffset = SkIPoint::Make(bounds->x(), bounds->y()); + return img; + } +} + +// NOTE: The new onGetOutputLayerBounds() and onGetInputLayerBounds() default to calling into the +// deprecated onFilterBounds and onFilterNodeBounds. While these functions are not tagged, they do +// match the documented default behavior for the new bounds functions. +SkIRect SkImageFilter_Base::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection dir, const SkIRect* inputRect) const { + if (this->countInputs() < 1) { + return src; + } + + SkIRect totalBounds; + for (int i = 0; i < this->countInputs(); ++i) { + const SkImageFilter* filter = this->getInput(i); + SkIRect rect = filter ? filter->filterBounds(src, ctm, dir, inputRect) : src; + if (0 == i) { + totalBounds = rect; + } else { + totalBounds.join(rect); + } + } + + return totalBounds; +} + +SkIRect SkImageFilter_Base::onFilterNodeBounds(const SkIRect& src, const SkMatrix&, + MapDirection, const SkIRect*) const { + return src; +} + +skif::LayerSpace SkImageFilter_Base::visitInputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds) const { + if (this->countInputs() < 1) { + // TODO (michaelludwig) - if a filter doesn't have any inputs, it doesn't need any + // implicit source image, so arguably we could return an empty rect here. 'desiredOutput' is + // consistent with original behavior, so empty bounds may have unintended side effects + // but should be explored later. Of note is that right now an empty layer bounds assumes + // that there's no need to filter on restore, which is not the case for these filters. + return desiredOutput; + } + + skif::LayerSpace netInput; + for (int i = 0; i < this->countInputs(); ++i) { + const SkImageFilter* filter = this->getInput(i); + // The required input for this input filter, or 'targetOutput' if the filter is null and + // the source image is used (so must be sized to cover 'targetOutput'). + // TODO (michaelludwig) - Right now contentBounds is applied conditionally at the end of + // the root getInputLayerBounds() based on affecting transparent black. Once that bit only + // changes output behavior, we can have the required bounds for a null input filter be the + // intersection of the desired output and the content bounds. + skif::LayerSpace requiredInput = + filter ? as_IFB(filter)->onGetInputLayerBounds(mapping, desiredOutput, + contentBounds) + : desiredOutput; + // Accumulate with all other filters + if (i == 0) { + netInput = requiredInput; + } else { + netInput.join(requiredInput); + } + } + return netInput; +} + +skif::LayerSpace SkImageFilter_Base::visitOutputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& contentBounds) const { + if (this->countInputs() < 1) { + // TODO (michaelludwig) - if a filter doesn't have any inputs, it presumably is determining + // its output size from something other than the implicit source contentBounds, in which + // case it shouldn't be calling this helper function, so explore adding an unreachable test + return contentBounds; + } + + skif::LayerSpace netOutput; + for (int i = 0; i < this->countInputs(); ++i) { + const SkImageFilter* filter = this->getInput(i); + // The output for just this input filter, or 'contentBounds' if the filter is null and + // the source image is used (i.e. the identity filter applied to the source). + skif::LayerSpace output = + filter ? as_IFB(filter)->onGetOutputLayerBounds(mapping, contentBounds) + : contentBounds; + // Accumulate with all other filters + if (i == 0) { + netOutput = output; + } else { + netOutput.join(output); + } + } + return netOutput; +} + +skif::LayerSpace SkImageFilter_Base::onGetInputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds, VisitChildren recurse) const { + // Call old functions for now since they may have been overridden by a subclass that's not been + // updated yet; eventually this will be a pure virtual and impls control visiting children + SkIRect content = SkIRect(contentBounds); + SkIRect input = this->onFilterNodeBounds(SkIRect(desiredOutput), mapping.layerMatrix(), + kReverse_MapDirection, &content); + if (recurse == VisitChildren::kYes) { + SkIRect aggregate = this->onFilterBounds(input, mapping.layerMatrix(), + kReverse_MapDirection, &input); + return skif::LayerSpace(aggregate); + } else { + return skif::LayerSpace(input); + } +} + +skif::LayerSpace SkImageFilter_Base::onGetOutputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& contentBounds) const { + // Call old functions for now; eventually this will be a pure virtual + SkIRect aggregate = this->onFilterBounds(SkIRect(contentBounds), mapping.layerMatrix(), + kForward_MapDirection, nullptr); + SkIRect output = this->onFilterNodeBounds(aggregate, mapping.layerMatrix(), + kForward_MapDirection, nullptr); + return skif::LayerSpace(output); +} + +skif::FilterResult SkImageFilter_Base::filterInput(int index, const skif::Context& ctx) const { + const SkImageFilter* input = this->getInput(index); + if (!input) { + // Null image filters late bind to the source image + return ctx.source(); + } + + skif::FilterResult result = as_IFB(input)->filterImage(this->mapContext(ctx)); + SkASSERT(!result.image() || ctx.gpuBacked() == result.image()->isTextureBacked()); + + return result; +} + +SkImageFilter_Base::Context SkImageFilter_Base::mapContext(const Context& ctx) const { + // We don't recurse through the child input filters because that happens automatically + // as part of the filterImage() evaluation. In this case, we want the bounds for the + // edge from this node to its children, without the effects of the child filters. + skif::LayerSpace childOutput = this->onGetInputLayerBounds( + ctx.mapping(), ctx.desiredOutput(), ctx.desiredOutput(), VisitChildren::kNo); + return ctx.withNewDesiredOutput(childOutput); +} + +#if defined(SK_GANESH) +sk_sp SkImageFilter_Base::DrawWithFP(GrRecordingContext* rContext, + std::unique_ptr fp, + const SkIRect& bounds, + SkColorType colorType, + const SkColorSpace* colorSpace, + const SkSurfaceProps& surfaceProps, + GrSurfaceOrigin surfaceOrigin, + GrProtected isProtected) { + GrImageInfo info(SkColorTypeToGrColorType(colorType), + kPremul_SkAlphaType, + sk_ref_sp(colorSpace), + bounds.size()); + + auto sfc = rContext->priv().makeSFC(info, + "ImageFilterBase_DrawWithFP", + SkBackingFit::kApprox, + 1, + GrMipmapped::kNo, + isProtected, + surfaceOrigin); + if (!sfc) { + return nullptr; + } + + SkIRect dstIRect = SkIRect::MakeWH(bounds.width(), bounds.height()); + SkRect srcRect = SkRect::Make(bounds); + sfc->fillRectToRectWithFP(srcRect, dstIRect, std::move(fp)); + + return SkSpecialImage::MakeDeferredFromGpu(rContext, + dstIRect, + kNeedNewImageUniqueID_SpecialImage, + sfc->readSurfaceView(), + sfc->colorInfo(), + surfaceProps); +} + +sk_sp SkImageFilter_Base::ImageToColorSpace(SkSpecialImage* src, + SkColorType colorType, + SkColorSpace* colorSpace, + const SkSurfaceProps& surfaceProps) { + // There are several conditions that determine if we actually need to convert the source to the + // destination's color space. Rather than duplicate that logic here, just try to make an xform + // object. If that produces something, then both are tagged, and the source is in a different + // gamut than the dest. There is some overhead to making the xform, but those are cached, and + // if we get one back, that means we're about to use it during the conversion anyway. + auto colorSpaceXform = GrColorSpaceXform::Make(src->getColorSpace(), src->alphaType(), + colorSpace, kPremul_SkAlphaType); + + if (!colorSpaceXform) { + // No xform needed, just return the original image + return sk_ref_sp(src); + } + + sk_sp surf(src->makeSurface(colorType, colorSpace, + SkISize::Make(src->width(), src->height()), + kPremul_SkAlphaType, surfaceProps)); + if (!surf) { + return sk_ref_sp(src); + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + SkPaint p; + p.setBlendMode(SkBlendMode::kSrc); + src->draw(canvas, 0, 0, SkSamplingOptions(), &p); + return surf->makeImageSnapshot(); +} +#endif + +// In repeat mode, when we are going to sample off one edge of the srcBounds we require the +// opposite side be preserved. +SkIRect SkImageFilter_Base::DetermineRepeatedSrcBound(const SkIRect& srcBounds, + const SkIVector& filterOffset, + const SkISize& filterSize, + const SkIRect& originalSrcBounds) { + SkIRect tmp = srcBounds; + tmp.adjust(-filterOffset.fX, -filterOffset.fY, + filterSize.fWidth - filterOffset.fX, filterSize.fHeight - filterOffset.fY); + + if (tmp.fLeft < originalSrcBounds.fLeft || tmp.fRight > originalSrcBounds.fRight) { + tmp.fLeft = originalSrcBounds.fLeft; + tmp.fRight = originalSrcBounds.fRight; + } + if (tmp.fTop < originalSrcBounds.fTop || tmp.fBottom > originalSrcBounds.fBottom) { + tmp.fTop = originalSrcBounds.fTop; + tmp.fBottom = originalSrcBounds.fBottom; + } + + return tmp; +} + +void SkImageFilter_Base::PurgeCache() { + SkImageFilterCache::Get()->purge(); +} diff --git a/gfx/skia/skia/src/core/SkImageFilterCache.cpp b/gfx/skia/skia/src/core/SkImageFilterCache.cpp new file mode 100644 index 0000000000..4d998cf86e --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageFilterCache.cpp @@ -0,0 +1,164 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkImageFilterCache.h" + +#include + +#include "include/core/SkImageFilter.h" +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkOnce.h" +#include "src/base/SkTInternalLList.h" +#include "src/core/SkOpts.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkTDynamicHash.h" +#include "src/core/SkTHash.h" + +#ifdef SK_BUILD_FOR_IOS + enum { kDefaultCacheSize = 2 * 1024 * 1024 }; +#else + enum { kDefaultCacheSize = 128 * 1024 * 1024 }; +#endif + +namespace { + +class CacheImpl : public SkImageFilterCache { +public: + typedef SkImageFilterCacheKey Key; + CacheImpl(size_t maxBytes) : fMaxBytes(maxBytes), fCurrentBytes(0) { } + ~CacheImpl() override { + fLookup.foreach([&](Value* v) { delete v; }); + } + struct Value { + Value(const Key& key, const skif::FilterResult& image, + const SkImageFilter* filter) + : fKey(key), fImage(image), fFilter(filter) {} + + Key fKey; + skif::FilterResult fImage; + const SkImageFilter* fFilter; + static const Key& GetKey(const Value& v) { + return v.fKey; + } + static uint32_t Hash(const Key& key) { + return SkOpts::hash(reinterpret_cast(&key), sizeof(Key)); + } + SK_DECLARE_INTERNAL_LLIST_INTERFACE(Value); + }; + + bool get(const Key& key, skif::FilterResult* result) const override { + SkASSERT(result); + + SkAutoMutexExclusive mutex(fMutex); + if (Value* v = fLookup.find(key)) { + if (v != fLRU.head()) { + fLRU.remove(v); + fLRU.addToHead(v); + } + + *result = v->fImage; + return true; + } + return false; + } + + void set(const Key& key, const SkImageFilter* filter, + const skif::FilterResult& result) override { + SkAutoMutexExclusive mutex(fMutex); + if (Value* v = fLookup.find(key)) { + this->removeInternal(v); + } + Value* v = new Value(key, result, filter); + fLookup.add(v); + fLRU.addToHead(v); + fCurrentBytes += result.image() ? result.image()->getSize() : 0; + if (auto* values = fImageFilterValues.find(filter)) { + values->push_back(v); + } else { + fImageFilterValues.set(filter, {v}); + } + + while (fCurrentBytes > fMaxBytes) { + Value* tail = fLRU.tail(); + SkASSERT(tail); + if (tail == v) { + break; + } + this->removeInternal(tail); + } + } + + void purge() override { + SkAutoMutexExclusive mutex(fMutex); + while (fCurrentBytes > 0) { + Value* tail = fLRU.tail(); + SkASSERT(tail); + this->removeInternal(tail); + } + } + + void purgeByImageFilter(const SkImageFilter* filter) override { + SkAutoMutexExclusive mutex(fMutex); + auto* values = fImageFilterValues.find(filter); + if (!values) { + return; + } + for (Value* v : *values) { + // We set the filter to be null so that removeInternal() won't delete from values while + // we're iterating over it. + v->fFilter = nullptr; + this->removeInternal(v); + } + fImageFilterValues.remove(filter); + } + + SkDEBUGCODE(int count() const override { return fLookup.count(); }) +private: + void removeInternal(Value* v) { + if (v->fFilter) { + if (auto* values = fImageFilterValues.find(v->fFilter)) { + if (values->size() == 1 && (*values)[0] == v) { + fImageFilterValues.remove(v->fFilter); + } else { + for (auto it = values->begin(); it != values->end(); ++it) { + if (*it == v) { + values->erase(it); + break; + } + } + } + } + } + fCurrentBytes -= v->fImage.image() ? v->fImage.image()->getSize() : 0; + fLRU.remove(v); + fLookup.remove(v->fKey); + delete v; + } +private: + SkTDynamicHash fLookup; + mutable SkTInternalLList fLRU; + // Value* always points to an item in fLookup. + SkTHashMap> fImageFilterValues; + size_t fMaxBytes; + size_t fCurrentBytes; + mutable SkMutex fMutex; +}; + +} // namespace + +SkImageFilterCache* SkImageFilterCache::Create(size_t maxBytes) { + return new CacheImpl(maxBytes); +} + +SkImageFilterCache* SkImageFilterCache::Get() { + static SkOnce once; + static SkImageFilterCache* cache; + + once([]{ cache = SkImageFilterCache::Create(kDefaultCacheSize); }); + return cache; +} diff --git a/gfx/skia/skia/src/core/SkImageFilterCache.h b/gfx/skia/skia/src/core/SkImageFilterCache.h new file mode 100644 index 0000000000..5af859367e --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageFilterCache.h @@ -0,0 +1,73 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageFilterCache_DEFINED +#define SkImageFilterCache_DEFINED + +#include "include/core/SkMatrix.h" +#include "include/core/SkRefCnt.h" +#include "src/core/SkImageFilterTypes.h" + +struct SkIPoint; +class SkImageFilter; + +struct SkImageFilterCacheKey { + SkImageFilterCacheKey(const uint32_t uniqueID, const SkMatrix& matrix, + const SkIRect& clipBounds, uint32_t srcGenID, const SkIRect& srcSubset) + : fUniqueID(uniqueID) + , fMatrix(matrix) + , fClipBounds(clipBounds) + , fSrcGenID(srcGenID) + , fSrcSubset(srcSubset) { + // Assert that Key is tightly-packed, since it is hashed. + static_assert(sizeof(SkImageFilterCacheKey) == sizeof(uint32_t) + sizeof(SkMatrix) + + sizeof(SkIRect) + sizeof(uint32_t) + 4 * sizeof(int32_t), + "image_filter_key_tight_packing"); + fMatrix.getType(); // force initialization of type, so hashes match + SkASSERT(fMatrix.isFinite()); // otherwise we can't rely on == self when comparing keys + } + + uint32_t fUniqueID; + SkMatrix fMatrix; + SkIRect fClipBounds; + uint32_t fSrcGenID; + SkIRect fSrcSubset; + + bool operator==(const SkImageFilterCacheKey& other) const { + return fUniqueID == other.fUniqueID && + fMatrix == other.fMatrix && + fClipBounds == other.fClipBounds && + fSrcGenID == other.fSrcGenID && + fSrcSubset == other.fSrcSubset; + } +}; + +// This cache maps from (filter's unique ID + CTM + clipBounds + src bitmap generation ID) to result +// NOTE: this is the _specific_ unique ID of the image filter, so refiltering the same image with a +// copy of the image filter (with exactly the same parameters) will not yield a cache hit. +class SkImageFilterCache : public SkRefCnt { +public: + enum { kDefaultTransientSize = 32 * 1024 * 1024 }; + + ~SkImageFilterCache() override {} + static SkImageFilterCache* Create(size_t maxBytes); + static SkImageFilterCache* Get(); + + // Returns true on cache hit and updates 'result' to be the cached result. Returns false when + // not in the cache, in which case 'result' is not modified. + virtual bool get(const SkImageFilterCacheKey& key, + skif::FilterResult* result) const = 0; + // 'filter' is included in the caching to allow the purging of all of an image filter's cached + // results when it is destroyed. + virtual void set(const SkImageFilterCacheKey& key, const SkImageFilter* filter, + const skif::FilterResult& result) = 0; + virtual void purge() = 0; + virtual void purgeByImageFilter(const SkImageFilter*) = 0; + SkDEBUGCODE(virtual int count() const = 0;) +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkImageFilterTypes.cpp b/gfx/skia/skia/src/core/SkImageFilterTypes.cpp new file mode 100644 index 0000000000..aa8cddb9cc --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageFilterTypes.cpp @@ -0,0 +1,430 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkImageFilterTypes.h" + +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkMatrixPriv.h" + +// This exists to cover up issues where infinite precision would produce integers but float +// math produces values just larger/smaller than an int and roundOut/In on bounds would produce +// nearly a full pixel error. One such case is crbug.com/1313579 where the caller has produced +// near integer CTM and uses integer crop rects that would grab an extra row/column of the +// input image when using a strict roundOut. +static constexpr float kRoundEpsilon = 1e-3f; + +// Both [I]Vectors and Sk[I]Sizes are transformed as non-positioned values, i.e. go through +// mapVectors() not mapPoints(). +static SkIVector map_as_vector(int32_t x, int32_t y, const SkMatrix& matrix) { + SkVector v = SkVector::Make(SkIntToScalar(x), SkIntToScalar(y)); + matrix.mapVectors(&v, 1); + return SkIVector::Make(SkScalarRoundToInt(v.fX), SkScalarRoundToInt(v.fY)); +} + +static SkVector map_as_vector(SkScalar x, SkScalar y, const SkMatrix& matrix) { + SkVector v = SkVector::Make(x, y); + matrix.mapVectors(&v, 1); + return v; +} + +// If m is epsilon within the form [1 0 tx], this returns true and sets out to [tx, ty] +// [0 1 ty] +// [0 0 1 ] +// TODO: Use this in decomposeCTM() (and possibly extend it to support is_nearly_scale_translate) +// to be a little more forgiving on matrix types during layer configuration. +static bool is_nearly_integer_translation(const skif::LayerSpace& m, + skif::LayerSpace* out=nullptr) { + float tx = SkScalarRoundToScalar(sk_ieee_float_divide(m.rc(0,2), m.rc(2,2))); + float ty = SkScalarRoundToScalar(sk_ieee_float_divide(m.rc(1,2), m.rc(2,2))); + SkMatrix expected = SkMatrix::MakeAll(1.f, 0.f, tx, + 0.f, 1.f, ty, + 0.f, 0.f, 1.f); + for (int i = 0; i < 9; ++i) { + if (!SkScalarNearlyEqual(expected.get(i), m.get(i), kRoundEpsilon)) { + return false; + } + } + + if (out) { + *out = skif::LayerSpace({(int) tx, (int) ty}); + } + return true; +} + +static SkRect map_rect(const SkMatrix& matrix, const SkRect& rect) { + if (rect.isEmpty()) { + return SkRect::MakeEmpty(); + } + return matrix.mapRect(rect); +} + +static SkIRect map_rect(const SkMatrix& matrix, const SkIRect& rect) { + if (rect.isEmpty()) { + return SkIRect::MakeEmpty(); + } + // Unfortunately, there is a range of integer values such that we have 1px precision as an int, + // but less precision as a float. This can lead to non-empty SkIRects becoming empty simply + // because of float casting. If we're already dealing with a float rect or having a float + // output, that's what we're stuck with; but if we are starting form an irect and desiring an + // SkIRect output, we go through efforts to preserve the 1px precision for simple transforms. + if (matrix.isScaleTranslate()) { + double l = (double)matrix.getScaleX()*rect.fLeft + (double)matrix.getTranslateX(); + double r = (double)matrix.getScaleX()*rect.fRight + (double)matrix.getTranslateX(); + double t = (double)matrix.getScaleY()*rect.fTop + (double)matrix.getTranslateY(); + double b = (double)matrix.getScaleY()*rect.fBottom + (double)matrix.getTranslateY(); + + return {sk_double_saturate2int(sk_double_floor(std::min(l, r) + kRoundEpsilon)), + sk_double_saturate2int(sk_double_floor(std::min(t, b) + kRoundEpsilon)), + sk_double_saturate2int(sk_double_ceil(std::max(l, r) - kRoundEpsilon)), + sk_double_saturate2int(sk_double_ceil(std::max(t, b) - kRoundEpsilon))}; + } else { + return skif::RoundOut(matrix.mapRect(SkRect::Make(rect))); + } +} + +namespace skif { + +SkIRect RoundOut(SkRect r) { return r.makeInset(kRoundEpsilon, kRoundEpsilon).roundOut(); } + +SkIRect RoundIn(SkRect r) { return r.makeOutset(kRoundEpsilon, kRoundEpsilon).roundIn(); } + +bool Mapping::decomposeCTM(const SkMatrix& ctm, const SkImageFilter* filter, + const skif::ParameterSpace& representativePt) { + SkMatrix remainder, layer; + SkSize decomposed; + using MatrixCapability = SkImageFilter_Base::MatrixCapability; + MatrixCapability capability = + filter ? as_IFB(filter)->getCTMCapability() : MatrixCapability::kComplex; + if (capability == MatrixCapability::kTranslate) { + // Apply the entire CTM post-filtering + remainder = ctm; + layer = SkMatrix::I(); + } else if (ctm.isScaleTranslate() || capability == MatrixCapability::kComplex) { + // Either layer space can be anything (kComplex) - or - it can be scale+translate, and the + // ctm is. In both cases, the layer space can be equivalent to device space. + remainder = SkMatrix::I(); + layer = ctm; + } else if (ctm.decomposeScale(&decomposed, &remainder)) { + // This case implies some amount of sampling post-filtering, either due to skew or rotation + // in the original matrix. As such, keep the layer matrix as simple as possible. + layer = SkMatrix::Scale(decomposed.fWidth, decomposed.fHeight); + } else { + // Perspective, which has a non-uniform scaling effect on the filter. Pick a single scale + // factor that best matches where the filter will be evaluated. + SkScalar scale = SkMatrixPriv::DifferentialAreaScale(ctm, SkPoint(representativePt)); + if (SkScalarIsFinite(scale) && !SkScalarNearlyZero(scale)) { + // Now take the sqrt to go from an area scale factor to a scaling per X and Y + // FIXME: It would be nice to be able to choose a non-uniform scale. + scale = SkScalarSqrt(scale); + } else { + // The representative point was behind the W = 0 plane, so don't factor out any scale. + // NOTE: This makes remainder and layer the same as the MatrixCapability::Translate case + scale = 1.f; + } + + remainder = ctm; + remainder.preScale(SkScalarInvert(scale), SkScalarInvert(scale)); + layer = SkMatrix::Scale(scale, scale); + } + + SkMatrix invRemainder; + if (!remainder.invert(&invRemainder)) { + // Under floating point arithmetic, it's possible to decompose an invertible matrix into + // a scaling matrix and a remainder and have the remainder be non-invertible. Generally + // when this happens the scale factors are so large and the matrix so ill-conditioned that + // it's unlikely that any drawing would be reasonable, so failing to make a layer is okay. + return false; + } else { + fParamToLayerMatrix = layer; + fLayerToDevMatrix = remainder; + fDevToLayerMatrix = invRemainder; + return true; + } +} + +bool Mapping::adjustLayerSpace(const SkMatrix& layer) { + SkMatrix invLayer; + if (!layer.invert(&invLayer)) { + return false; + } + fParamToLayerMatrix.postConcat(layer); + fDevToLayerMatrix.postConcat(layer); + fLayerToDevMatrix.preConcat(invLayer); + return true; +} + +// Instantiate map specializations for the 6 geometric types used during filtering +template<> +SkRect Mapping::map(const SkRect& geom, const SkMatrix& matrix) { + return map_rect(matrix, geom); +} + +template<> +SkIRect Mapping::map(const SkIRect& geom, const SkMatrix& matrix) { + return map_rect(matrix, geom); +} + +template<> +SkIPoint Mapping::map(const SkIPoint& geom, const SkMatrix& matrix) { + SkPoint p = SkPoint::Make(SkIntToScalar(geom.fX), SkIntToScalar(geom.fY)); + matrix.mapPoints(&p, 1); + return SkIPoint::Make(SkScalarRoundToInt(p.fX), SkScalarRoundToInt(p.fY)); +} + +template<> +SkPoint Mapping::map(const SkPoint& geom, const SkMatrix& matrix) { + SkPoint p; + matrix.mapPoints(&p, &geom, 1); + return p; +} + +template<> +IVector Mapping::map(const IVector& geom, const SkMatrix& matrix) { + return IVector(map_as_vector(geom.fX, geom.fY, matrix)); +} + +template<> +Vector Mapping::map(const Vector& geom, const SkMatrix& matrix) { + return Vector(map_as_vector(geom.fX, geom.fY, matrix)); +} + +template<> +SkISize Mapping::map(const SkISize& geom, const SkMatrix& matrix) { + SkIVector v = map_as_vector(geom.fWidth, geom.fHeight, matrix); + return SkISize::Make(v.fX, v.fY); +} + +template<> +SkSize Mapping::map(const SkSize& geom, const SkMatrix& matrix) { + SkVector v = map_as_vector(geom.fWidth, geom.fHeight, matrix); + return SkSize::Make(v.fX, v.fY); +} + +template<> +SkMatrix Mapping::map(const SkMatrix& m, const SkMatrix& matrix) { + // If 'matrix' maps from the C1 coord space to the C2 coord space, and 'm' is a transform that + // operates on, and outputs to, the C1 coord space, we want to return a new matrix that is + // equivalent to 'm' that operates on and outputs to C2. This is the same as mapping the input + // from C2 to C1 (matrix^-1), then transforming by 'm', and then mapping from C1 to C2 (matrix). + SkMatrix inv; + SkAssertResult(matrix.invert(&inv)); + inv.postConcat(m); + inv.postConcat(matrix); + return inv; +} + +LayerSpace LayerSpace::mapRect(const LayerSpace& r) const { + return LayerSpace(map_rect(fData, SkRect(r))); +} + +LayerSpace LayerSpace::mapRect(const LayerSpace& r) const { + return LayerSpace(map_rect(fData, SkIRect(r))); +} + +sk_sp FilterResult::imageAndOffset(SkIPoint* offset) const { + auto [image, origin] = this->resolve(fLayerBounds); + *offset = SkIPoint(origin); + return image; +} + +FilterResult FilterResult::applyCrop(const Context& ctx, + const LayerSpace& crop) const { + LayerSpace tightBounds = crop; + // TODO(michaelludwig): Intersecting to the target output is only valid when the crop has + // decal tiling (the only current option). + if (!fImage || !tightBounds.intersect(ctx.desiredOutput())) { + // The desired output would be filled with transparent black. + return {}; + } + + if (crop.contains(fLayerBounds)) { + // The original crop does not affect the image (although the context's desired output might) + // We can tighten fLayerBounds to the desired output without resolving the image, regardless + // of the transform type. + // TODO(michaelludwig): If the crop would use mirror or repeat, the above isn't true. + FilterResult restrictedOutput = *this; + SkAssertResult(restrictedOutput.fLayerBounds.intersect(ctx.desiredOutput())); + return restrictedOutput; + } else { + return this->resolve(tightBounds); + } +} + +static bool compatible_sampling(const SkSamplingOptions& currentSampling, + bool currentXformWontAffectNearest, + SkSamplingOptions* nextSampling, + bool nextXformWontAffectNearest) { + // Both transforms could perform non-trivial sampling, but if they are similar enough we + // assume performing one non-trivial sampling operation with the concatenated transform will + // not be visually distinguishable from sampling twice. + // TODO(michaelludwig): For now ignore mipmap policy, SkSpecialImages are not supposed to be + // drawn with mipmapping, and the majority of filter steps produce images that are at the + // proper scale and do not define mip levels. The main exception is the ::Image() filter + // leaf but that doesn't use this system yet. + if (currentSampling.isAniso() && nextSampling->isAniso()) { + // Assume we can get away with one sampling at the highest anisotropy level + *nextSampling = SkSamplingOptions::Aniso(std::max(currentSampling.maxAniso, + nextSampling->maxAniso)); + return true; + } else if (currentSampling.useCubic && (nextSampling->filter == SkFilterMode::kLinear || + (nextSampling->useCubic && + currentSampling.cubic.B == nextSampling->cubic.B && + currentSampling.cubic.C == nextSampling->cubic.C))) { + // Assume we can get away with the current bicubic filter, since the next is the same + // or a bilerp that can be upgraded. + *nextSampling = currentSampling; + return true; + } else if (nextSampling->useCubic && currentSampling.filter == SkFilterMode::kLinear) { + // Mirror of the above, assume we can just get away with next's cubic resampler + return true; + } else if (currentSampling.filter == SkFilterMode::kLinear && + nextSampling->filter == SkFilterMode::kLinear) { + // Assume we can get away with a single bilerp vs. the two + return true; + } else if (nextSampling->filter == SkFilterMode::kNearest && currentXformWontAffectNearest) { + // The next transform and nearest-neighbor filtering isn't impacted by the current transform + SkASSERT(currentSampling.filter == SkFilterMode::kLinear); + return true; + } else if (currentSampling.filter == SkFilterMode::kNearest && nextXformWontAffectNearest) { + // The next transform doesn't change the nearest-neighbor filtering of the current transform + SkASSERT(nextSampling->filter == SkFilterMode::kLinear); + *nextSampling = currentSampling; + return true; + } else { + // The current or next sampling is nearest neighbor, and will produce visible texels + // oriented with the current transform; assume this is a desired effect and preserve it. + return false; + } +} + +FilterResult FilterResult::applyTransform(const Context& ctx, + const LayerSpace &transform, + const SkSamplingOptions &sampling) const { + if (!fImage) { + // Transformed transparent black remains transparent black. + return {}; + } + + // Extract the sampling options that matter based on the current and next transforms. + // We make sure the new sampling is bilerp (default) if the new transform doesn't matter + // (and assert that the current is bilerp if its transform didn't matter). Bilerp can be + // maximally combined, so simplifies the logic in compatible_sampling(). + const bool currentXformIsInteger = is_nearly_integer_translation(fTransform); + const bool nextXformIsInteger = is_nearly_integer_translation(transform); + + SkASSERT(!currentXformIsInteger || fSamplingOptions == kDefaultSampling); + SkSamplingOptions nextSampling = nextXformIsInteger ? kDefaultSampling : sampling; + + FilterResult transformed; + if (compatible_sampling(fSamplingOptions, currentXformIsInteger, + &nextSampling, nextXformIsInteger)) { + // We can concat transforms and 'nextSampling' will be either fSamplingOptions, + // sampling, or a merged combination depending on the two transforms in play. + transformed = *this; + } else { + // We'll have to resolve this FilterResult first before 'transform' and 'sampling' can be + // correctly evaluated. 'nextSampling' will always be 'sampling'. + transformed = this->resolve(fLayerBounds); + } + + transformed.concatTransform(transform, nextSampling, ctx.desiredOutput()); + if (transformed.layerBounds().isEmpty()) { + return {}; + } else { + return transformed; + } +} + +void FilterResult::concatTransform(const LayerSpace& transform, + const SkSamplingOptions& newSampling, + const LayerSpace& desiredOutput) { + if (!fImage) { + // Under normal circumstances, concatTransform() will only be called when we have an image, + // but if resolve() fails to make a special surface, we may end up here at which point + // doing nothing further is appropriate. + return; + } + fSamplingOptions = newSampling; + fTransform.postConcat(transform); + // Rebuild the layer bounds and then restrict to the current desired output. The original value + // of fLayerBounds includes the image mapped by the original fTransform as well as any + // accumulated soft crops from desired outputs of prior stages. To prevent discarding that info, + // we map fLayerBounds by the additional transform, instead of re-mapping the image bounds. + fLayerBounds = transform.mapRect(fLayerBounds); + if (!fLayerBounds.intersect(desiredOutput)) { + // The transformed output doesn't touch the desired, so it would just be transparent black. + // TODO: This intersection only applies when the tile mode is kDecal. + fLayerBounds = LayerSpace::Empty(); + } +} + +std::pair, LayerSpace> FilterResult::resolve( + LayerSpace dstBounds) const { + // TODO(michaelludwig): Only valid for kDecal, although kClamp would only need 1 extra + // pixel of padding so some restriction could happen. We also should skip the intersection if + // we need to include transparent black pixels. + if (!fImage || !dstBounds.intersect(fLayerBounds)) { + return {nullptr, {}}; + } + + // TODO: This logic to skip a draw will also need to account for the tile mode, but we can + // always restrict to the intersection of dstBounds and the image's subset since we are + // currently always decal sampling. + // TODO(michaelludwig): If we get to the point where all filter results track bounds in + // floating point, then we can extend this case to any S+T transform. + LayerSpace origin; + if (is_nearly_integer_translation(fTransform, &origin)) { + LayerSpace imageBounds(SkIRect::MakeXYWH(origin.x(), origin.y(), + fImage->width(), fImage->height())); + if (!imageBounds.intersect(dstBounds)) { + return {nullptr, {}}; + } + + // Offset the image subset directly to avoid issues negating (origin). With the prior + // intersection (bounds - origin) will be >= 0, but (bounds + (-origin)) may not, (e.g. + // origin is INT_MIN). + SkIRect subset = { imageBounds.left() - origin.x(), + imageBounds.top() - origin.y(), + imageBounds.right() - origin.x(), + imageBounds.bottom() - origin.y() }; + SkASSERT(subset.fLeft >= 0 && subset.fTop >= 0 && + subset.fRight <= fImage->width() && subset.fBottom <= fImage->height()); + + return {fImage->makeSubset(subset), imageBounds.topLeft()}; + } // else fall through and attempt a draw + + sk_sp surface = fImage->makeSurface(fImage->colorType(), + fImage->getColorSpace(), + SkISize(dstBounds.size()), + kPremul_SkAlphaType, {}); + if (!surface) { + return {nullptr, {}}; + } + SkCanvas* canvas = surface->getCanvas(); + // skbug.com/5075: GPU-backed special surfaces don't reset their contents. + canvas->clear(SK_ColorTRANSPARENT); + canvas->translate(-dstBounds.left(), -dstBounds.top()); // dst's origin adjustment + + SkPaint paint; + paint.setAntiAlias(true); + paint.setBlendMode(SkBlendMode::kSrc); + + // TODO: When using a tile mode other than kDecal, we'll need to use SkSpecialImage::asShader() + // and use drawRect(fLayerBounds). + if (!fLayerBounds.contains(dstBounds)) { + // We're resolving to a larger than necessary image, so make sure transparency outside of + // fLayerBounds is preserved. + // NOTE: This should only happen when the next layer requires processing transparent black. + canvas->clipIRect(SkIRect(fLayerBounds)); + } + canvas->concat(SkMatrix(fTransform)); // src's origin is embedded in fTransform + fImage->draw(canvas, 0.f, 0.f, fSamplingOptions, &paint); + + return {surface->makeImageSnapshot(), dstBounds.topLeft()}; +} + +} // end namespace skif diff --git a/gfx/skia/skia/src/core/SkImageFilterTypes.h b/gfx/skia/skia/src/core/SkImageFilterTypes.h new file mode 100644 index 0000000000..58dc680adf --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageFilterTypes.h @@ -0,0 +1,799 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageFilterTypes_DEFINED +#define SkImageFilterTypes_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkTypes.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" + +class GrRecordingContext; +class SkImageFilter; +class SkImageFilterCache; +class SkSpecialSurface; +class SkSurfaceProps; + +// The skif (SKI[mage]F[ilter]) namespace contains types that are used for filter implementations. +// The defined types come in two groups: users of internal Skia types, and templates to help with +// readability. Image filters cannot be implemented without access to key internal types, such as +// SkSpecialImage. It is possible to avoid the use of the readability templates, although they are +// strongly encouraged. +namespace skif { + +// Rounds in/out but with a tolerance. +SkIRect RoundOut(SkRect); +SkIRect RoundIn(SkRect); + +// skif::IVector and skif::Vector represent plain-old-data types for storing direction vectors, so +// that the coordinate-space templating system defined below can have a separate type id for +// directions vs. points, and specialize appropriately. As such, all operations with direction +// vectors are defined on the LayerSpace specialization, since that is the intended point of use. +struct IVector { + int32_t fX; + int32_t fY; + + IVector() = default; + IVector(int32_t x, int32_t y) : fX(x), fY(y) {} + explicit IVector(const SkIVector& v) : fX(v.fX), fY(v.fY) {} +}; + +struct Vector { + SkScalar fX; + SkScalar fY; + + Vector() = default; + Vector(SkScalar x, SkScalar y) : fX(x), fY(y) {} + explicit Vector(const SkVector& v) : fX(v.fX), fY(v.fY) {} +}; + +/////////////////////////////////////////////////////////////////////////////////////////////////// +// Coordinate Space Tagging +// - In order to enforce correct coordinate spaces in image filter implementations and use, +// geometry is wrapped by templated structs to declare in the type system what coordinate space +// the coordinates are defined in. +// - Currently there is ParameterSpace and DeviceSpace that are data-only wrappers around +// coordinates, and the primary LayerSpace that provides all operative functionality for image +// filters. It is intended that all logic about image bounds and access be conducted in the shared +// layer space. +// - The LayerSpace struct has type-safe specializations for SkIRect, SkRect, SkIPoint, SkPoint, +// skif::IVector (to distinguish SkIVector from SkIPoint), skif::Vector, SkISize, and SkSize. +// - A Mapping object provides type safe coordinate conversions between these spaces, and +// automatically does the "right thing" for each geometric type. +/////////////////////////////////////////////////////////////////////////////////////////////////// + +// ParameterSpace is a data-only wrapper around Skia's geometric types such as SkIPoint, and SkRect. +// Parameter space is the same as the local coordinate space of an SkShader, or the coordinates +// passed into SkCanvas::drawX calls, but "local" is avoided due to the alliteration with layer +// space. SkImageFilters are defined in terms of ParameterSpace geometry and must use the Mapping +// on Context to transform the parameters into LayerSpace to evaluate the filter in the shared +// coordinate space of the entire filter DAG. +// +// A value of ParameterSpace implies that its wrapped SkIRect is defined in the local +// parameter space. +template +class ParameterSpace { +public: + ParameterSpace() = default; + explicit ParameterSpace(const T& data) : fData(data) {} + explicit ParameterSpace(T&& data) : fData(std::move(data)) {} + + explicit operator const T&() const { return fData; } + + static const ParameterSpace* Optional(const T* ptr) { + return static_cast*>(reinterpret_cast(ptr)); + } +private: + T fData; +}; + +// DeviceSpace is a data-only wrapper around Skia's geometric types. It is similar to +// 'ParameterSpace' except that it is used to represent geometry that has been transformed or +// defined in the root device space (i.e. the final pixels of drawn content). Much of what SkCanvas +// tracks, such as its clip bounds are defined in this space and DeviceSpace provides a +// type-enforced mechanism for the canvas to pass that information into the image filtering system, +// using the Mapping of the filtering context. +template +class DeviceSpace { +public: + DeviceSpace() = default; + explicit DeviceSpace(const T& data) : fData(data) {} + explicit DeviceSpace(T&& data) : fData(std::move(data)) {} + + explicit operator const T&() const { return fData; } + +private: + T fData; +}; + +// LayerSpace is a geometric wrapper that specifies the geometry is defined in the shared layer +// space where image filters are evaluated. For a given Context (and its Mapping), the image filter +// DAG operates in the same coordinate space. This space may be different from the local coordinate +// space that defined the image filter parameters (such as blur sigma), and it may be different +// from the total CTM of the SkCanvas. +// +// To encourage correct filter use and implementation, the bulk of filter logic should be performed +// in layer space (e.g. determining what portion of an input image to read, or what the output +// region is). LayerSpace specializations for the six common Skia math types (Sk[I]Rect, Sk[I]Point, +// and Sk[I]Size), and skif::[I]Vector (to allow vectors to be specialized separately from points)) +// are provided that mimic their APIs but preserve the coordinate space and enforce type semantics. +template +class LayerSpace {}; + +// Layer-space specialization for integerized direction vectors. +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const IVector& geometry) : fData(geometry) {} + explicit LayerSpace(IVector&& geometry) : fData(std::move(geometry)) {} + explicit operator const IVector&() const { return fData; } + + explicit operator SkIVector() const { return SkIVector::Make(fData.fX, fData.fY); } + + int32_t x() const { return fData.fX; } + int32_t y() const { return fData.fY; } + + LayerSpace operator-() const { return LayerSpace({-fData.fX, -fData.fY}); } + + LayerSpace operator+(const LayerSpace& v) const { + LayerSpace sum = *this; + sum += v; + return sum; + } + LayerSpace operator-(const LayerSpace& v) const { + LayerSpace diff = *this; + diff -= v; + return diff; + } + + void operator+=(const LayerSpace& v) { + fData.fX += v.fData.fX; + fData.fY += v.fData.fY; + } + void operator-=(const LayerSpace& v) { + fData.fX -= v.fData.fX; + fData.fY -= v.fData.fY; + } + +private: + IVector fData; +}; + +// Layer-space specialization for floating point direction vectors. +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const Vector& geometry) : fData(geometry) {} + explicit LayerSpace(Vector&& geometry) : fData(std::move(geometry)) {} + explicit operator const Vector&() const { return fData; } + + explicit operator SkVector() const { return SkVector::Make(fData.fX, fData.fY); } + + SkScalar x() const { return fData.fX; } + SkScalar y() const { return fData.fY; } + + SkScalar length() const { return SkVector::Length(fData.fX, fData.fY); } + + LayerSpace operator-() const { return LayerSpace({-fData.fX, -fData.fY}); } + + LayerSpace operator*(SkScalar s) const { + LayerSpace scaled = *this; + scaled *= s; + return scaled; + } + + LayerSpace operator+(const LayerSpace& v) const { + LayerSpace sum = *this; + sum += v; + return sum; + } + LayerSpace operator-(const LayerSpace& v) const { + LayerSpace diff = *this; + diff -= v; + return diff; + } + + void operator*=(SkScalar s) { + fData.fX *= s; + fData.fY *= s; + } + void operator+=(const LayerSpace& v) { + fData.fX += v.fData.fX; + fData.fY += v.fData.fY; + } + void operator-=(const LayerSpace& v) { + fData.fX -= v.fData.fX; + fData.fY -= v.fData.fY; + } + + friend LayerSpace operator*(SkScalar s, const LayerSpace& b) { + return b * s; + } + +private: + Vector fData; +}; + +// Layer-space specialization for integer 2D coordinates (treated as positions, not directions). +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const SkIPoint& geometry) : fData(geometry) {} + explicit LayerSpace(SkIPoint&& geometry) : fData(std::move(geometry)) {} + explicit operator const SkIPoint&() const { return fData; } + + // Parrot the SkIPoint API while preserving coordinate space. + int32_t x() const { return fData.fX; } + int32_t y() const { return fData.fY; } + + // Offsetting by direction vectors produce more points + LayerSpace operator+(const LayerSpace& v) { + return LayerSpace(fData + SkIVector(v)); + } + LayerSpace operator-(const LayerSpace& v) { + return LayerSpace(fData - SkIVector(v)); + } + + void operator+=(const LayerSpace& v) { + fData += SkIVector(v); + } + void operator-=(const LayerSpace& v) { + fData -= SkIVector(v); + } + + // Subtracting another point makes a direction between them + LayerSpace operator-(const LayerSpace& p) { + return LayerSpace(IVector(fData - p.fData)); + } + + LayerSpace operator-() const { return LayerSpace({-fData.fX, -fData.fY}); } + +private: + SkIPoint fData; +}; + +// Layer-space specialization for floating point 2D coordinates (treated as positions) +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const SkPoint& geometry) : fData(geometry) {} + explicit LayerSpace(SkPoint&& geometry) : fData(std::move(geometry)) {} + explicit operator const SkPoint&() const { return fData; } + + // Parrot the SkPoint API while preserving coordinate space. + SkScalar x() const { return fData.fX; } + SkScalar y() const { return fData.fY; } + + SkScalar distanceToOrigin() const { return fData.distanceToOrigin(); } + + // Offsetting by direction vectors produce more points + LayerSpace operator+(const LayerSpace& v) { + return LayerSpace(fData + SkVector(v)); + } + LayerSpace operator-(const LayerSpace& v) { + return LayerSpace(fData - SkVector(v)); + } + + void operator+=(const LayerSpace& v) { + fData += SkVector(v); + } + void operator-=(const LayerSpace& v) { + fData -= SkVector(v); + } + + // Subtracting another point makes a direction between them + LayerSpace operator-(const LayerSpace& p) { + return LayerSpace(Vector(fData - p.fData)); + } + + LayerSpace operator-() const { return LayerSpace({-fData.fX, -fData.fY}); } + +private: + SkPoint fData; +}; + +// Layer-space specialization for integer dimensions +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const SkISize& geometry) : fData(geometry) {} + explicit LayerSpace(SkISize&& geometry) : fData(std::move(geometry)) {} + explicit operator const SkISize&() const { return fData; } + + int32_t width() const { return fData.width(); } + int32_t height() const { return fData.height(); } + + bool isEmpty() const { return fData.isEmpty(); } + +private: + SkISize fData; +}; + +// Layer-space specialization for floating point dimensions +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const SkSize& geometry) : fData(geometry) {} + explicit LayerSpace(SkSize&& geometry) : fData(std::move(geometry)) {} + explicit operator const SkSize&() const { return fData; } + + SkScalar width() const { return fData.width(); } + SkScalar height() const { return fData.height(); } + + bool isEmpty() const { return fData.isEmpty(); } + bool isZero() const { return fData.isZero(); } + + LayerSpace round() const { return LayerSpace(fData.toRound()); } + LayerSpace ceil() const { return LayerSpace(fData.toCeil()); } + LayerSpace floor() const { return LayerSpace(fData.toFloor()); } + +private: + SkSize fData; +}; + +// Layer-space specialization for axis-aligned integer bounding boxes. +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const SkIRect& geometry) : fData(geometry) {} + explicit LayerSpace(SkIRect&& geometry) : fData(std::move(geometry)) {} + explicit LayerSpace(const SkISize& size) : fData(SkIRect::MakeSize(size)) {} + explicit operator const SkIRect&() const { return fData; } + + static LayerSpace Empty() { return LayerSpace(SkIRect::MakeEmpty()); } + + // Parrot the SkIRect API while preserving coord space + bool isEmpty() const { return fData.isEmpty(); } + bool contains(const LayerSpace& r) const { return fData.contains(r.fData); } + + int32_t left() const { return fData.fLeft; } + int32_t top() const { return fData.fTop; } + int32_t right() const { return fData.fRight; } + int32_t bottom() const { return fData.fBottom; } + + int32_t width() const { return fData.width(); } + int32_t height() const { return fData.height(); } + + LayerSpace topLeft() const { return LayerSpace(fData.topLeft()); } + LayerSpace size() const { return LayerSpace(fData.size()); } + + bool intersect(const LayerSpace& r) { return fData.intersect(r.fData); } + void join(const LayerSpace& r) { fData.join(r.fData); } + void offset(const LayerSpace& v) { fData.offset(SkIVector(v)); } + void outset(const LayerSpace& delta) { fData.outset(delta.width(), delta.height()); } + +private: + SkIRect fData; +}; + +// Layer-space specialization for axis-aligned float bounding boxes. +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const SkRect& geometry) : fData(geometry) {} + explicit LayerSpace(SkRect&& geometry) : fData(std::move(geometry)) {} + explicit LayerSpace(const LayerSpace& rect) : fData(SkRect::Make(SkIRect(rect))) {} + explicit operator const SkRect&() const { return fData; } + + static LayerSpace Empty() { return LayerSpace(SkRect::MakeEmpty()); } + + // Parrot the SkRect API while preserving coord space and usage + bool isEmpty() const { return fData.isEmpty(); } + bool contains(const LayerSpace& r) const { return fData.contains(r.fData); } + + SkScalar left() const { return fData.fLeft; } + SkScalar top() const { return fData.fTop; } + SkScalar right() const { return fData.fRight; } + SkScalar bottom() const { return fData.fBottom; } + + SkScalar width() const { return fData.width(); } + SkScalar height() const { return fData.height(); } + + LayerSpace topLeft() const { + return LayerSpace(SkPoint::Make(fData.fLeft, fData.fTop)); + } + LayerSpace size() const { + return LayerSpace(SkSize::Make(fData.width(), fData.height())); + } + + LayerSpace round() const { return LayerSpace(fData.round()); } + LayerSpace roundIn() const { return LayerSpace(RoundIn(fData)); } + LayerSpace roundOut() const { return LayerSpace(RoundOut(fData)); } + + bool intersect(const LayerSpace& r) { return fData.intersect(r.fData); } + void join(const LayerSpace& r) { fData.join(r.fData); } + void offset(const LayerSpace& v) { fData.offset(SkVector(v)); } + void outset(const LayerSpace& delta) { fData.outset(delta.width(), delta.height()); } + +private: + SkRect fData; +}; + +// A transformation that manipulates geometry in the layer-space coordinate system. Mathematically +// there's little difference from these matrices compared to what's stored in a skif::Mapping, but +// the intent differs. skif::Mapping's matrices map geometry from one coordinate space to another +// while these transforms move geometry w/o changing the coordinate space semantics. +// TODO(michaelludwig): Will be replaced with an SkM44 version when skif::Mapping works with SkM44. +template<> +class LayerSpace { +public: + LayerSpace() = default; + explicit LayerSpace(const SkMatrix& m) : fData(m) {} + explicit LayerSpace(SkMatrix&& m) : fData(std::move(m)) {} + explicit operator const SkMatrix&() const { return fData; } + + // Parrot a limited selection of the SkMatrix API while preserving coordinate space. + LayerSpace mapRect(const LayerSpace& r) const; + + // Effectively mapRect(SkRect).roundOut() but more accurate when the underlying matrix or + // SkIRect has large floating point values. + LayerSpace mapRect(const LayerSpace& r) const; + + LayerSpace mapPoint(const LayerSpace& p) const { + return LayerSpace(fData.mapPoint(SkPoint(p))); + } + + LayerSpace mapVector(const LayerSpace& v) const { + return LayerSpace(Vector(fData.mapVector(v.x(), v.y()))); + } + + LayerSpace& preConcat(const LayerSpace& m) { + fData = SkMatrix::Concat(fData, m.fData); + return *this; + } + + LayerSpace& postConcat(const LayerSpace& m) { + fData = SkMatrix::Concat(m.fData, fData); + return *this; + } + + bool invert(LayerSpace* inverse) const { + return fData.invert(&inverse->fData); + } + + float rc(int row, int col) const { return fData.rc(row, col); } + float get(int i) const { return fData.get(i); } + +private: + SkMatrix fData; +}; + +// Mapping is the primary definition of the shared layer space used when evaluating an image filter +// DAG. It encapsulates any needed decomposition of the total CTM into the parameter-to-layer matrix +// (that filters use to map their parameters to the layer space), and the layer-to-device matrix +// (that canvas uses to map the output layer-space image into its root device space). Mapping +// defines functions to transform ParameterSpace and DeviceSpace types to and from their LayerSpace +// variants, which can then be used and reasoned about by SkImageFilter implementations. +class Mapping { +public: + Mapping() = default; + + // Helper constructor that equates device and layer space to the same coordinate space. + explicit Mapping(const SkMatrix& paramToLayer) + : fLayerToDevMatrix(SkMatrix::I()) + , fParamToLayerMatrix(paramToLayer) + , fDevToLayerMatrix(SkMatrix::I()) {} + + // This constructor allows the decomposition to be explicitly provided, assumes that + // 'layerToDev's inverse has already been calculated in 'devToLayer' + Mapping(const SkMatrix& layerToDev, const SkMatrix& devToLayer, const SkMatrix& paramToLayer) + : fLayerToDevMatrix(layerToDev) + , fParamToLayerMatrix(paramToLayer) + , fDevToLayerMatrix(devToLayer) {} + + // Sets this Mapping to the default decomposition of the canvas's total transform, given the + // requirements of the 'filter'. Returns false if the decomposition failed or would produce an + // invalid device matrix. Assumes 'ctm' is invertible. + bool SK_WARN_UNUSED_RESULT decomposeCTM(const SkMatrix& ctm, + const SkImageFilter* filter, + const skif::ParameterSpace& representativePt); + + // Update the mapping's parameter-to-layer matrix to be pre-concatenated with the specified + // local space transformation. This changes the definition of parameter space, any + // skif::ParameterSpace<> values are interpreted anew. Layer space and device space are + // unchanged. + void concatLocal(const SkMatrix& local) { fParamToLayerMatrix.preConcat(local); } + + // Update the mapping's layer space coordinate system by post-concatenating the given matrix + // to it's parameter-to-layer transform, and pre-concatenating the inverse of the matrix with + // it's layer-to-device transform. The net effect is that neither the parameter nor device + // coordinate systems are changed, but skif::LayerSpace is adjusted. + // + // Returns false if the layer matrix cannot be inverted, and this mapping is left unmodified. + bool adjustLayerSpace(const SkMatrix& layer); + + // Update the mapping's layer space so that the point 'origin' in the current layer coordinate + // space maps to (0, 0) in the adjusted coordinate space. + void applyOrigin(const LayerSpace& origin) { + SkAssertResult(this->adjustLayerSpace(SkMatrix::Translate(-origin.x(), -origin.y()))); + } + + const SkMatrix& layerToDevice() const { return fLayerToDevMatrix; } + const SkMatrix& deviceToLayer() const { return fDevToLayerMatrix; } + const SkMatrix& layerMatrix() const { return fParamToLayerMatrix; } + SkMatrix totalMatrix() const { + return SkMatrix::Concat(fLayerToDevMatrix, fParamToLayerMatrix); + } + + template + LayerSpace paramToLayer(const ParameterSpace& paramGeometry) const { + return LayerSpace(map(static_cast(paramGeometry), fParamToLayerMatrix)); + } + + template + LayerSpace deviceToLayer(const DeviceSpace& devGeometry) const { + return LayerSpace(map(static_cast(devGeometry), fDevToLayerMatrix)); + } + + template + DeviceSpace layerToDevice(const LayerSpace& layerGeometry) const { + return DeviceSpace(map(static_cast(layerGeometry), fLayerToDevMatrix)); + } + +private: + // The image filter process decomposes the total CTM into layerToDev * paramToLayer and uses the + // param-to-layer matrix to define the layer-space coordinate system. Depending on how it's + // decomposed, either the layer matrix or the device matrix could be the identity matrix (but + // sometimes neither). + SkMatrix fLayerToDevMatrix; + SkMatrix fParamToLayerMatrix; + + // Cached inverse of fLayerToDevMatrix + SkMatrix fDevToLayerMatrix; + + // Actual geometric mapping operations that work on coordinates and matrices w/o the type + // safety of the coordinate space wrappers (hence these are private). + template + static T map(const T& geom, const SkMatrix& matrix); +}; + +class Context; // Forward declare for FilterResult + +// Wraps an SkSpecialImage and metadata needed to rasterize it to a shared layer coordinate space. +// This includes a transform matrix, sampling options, and clip. Frequently, the transform is an +// integer translation that effectively places the origin of the image within the layer space. When +// this is the case, the FilterResult's layerBounds have the same width and height as the subset +// of the special image and translated to that origin. However, the transform of a FilterResult can +// be arbitrary, in which case its layer bounds is the bounding box that would contain the sampled +// image's contents. +// +// In order to collapse image filter nodes dynamically, FilterResult provides utilities to apply +// operations (like transform or crop) that attempt to modify the metadata without producing an +// intermediate image. Internally it tracks when a new image is needed and rasterizes as needed. +// +// When filter implementations are processing intermediate FilterResult results, it can be assumed +// that all FilterResult' layerBounds are in the same coordinate space defined by the shared +// skif::Context. +// +// NOTE: This is named FilterResult since most instances will represent the output of an image +// filter (even if that is then used as an input to the next filter). The main exception is the +// source input used when an input filter is null, but from a data-standpoint it is the same since +// it is equivalent to the result of an identity filter. +class FilterResult { + // Bilinear is used as the default because it can be downgraded to nearest-neighbor when the + // final transform is pixel-aligned, and chaining multiple bilinear samples and transforms is + // assumed to be visually close enough to sampling once at highest quality and final transform. + static constexpr SkSamplingOptions kDefaultSampling{SkFilterMode::kLinear}; +public: + FilterResult() : FilterResult(nullptr) {} + + explicit FilterResult(sk_sp image) + : FilterResult(std::move(image), LayerSpace({0, 0})) {} + + FilterResult(std::pair, LayerSpace> imageAndOrigin) + : FilterResult(std::move(std::get<0>(imageAndOrigin)), std::get<1>(imageAndOrigin)) {} + + FilterResult(sk_sp image, const LayerSpace& origin) + : fImage(std::move(image)) + , fSamplingOptions(kDefaultSampling) + , fTransform(SkMatrix::Translate(origin.x(), origin.y())) + , fLayerBounds( + fTransform.mapRect(LayerSpace(fImage ? fImage->dimensions() + : SkISize{0, 0}))) {} + + explicit operator bool() const { return SkToBool(fImage); } + + // TODO(michaelludwig): Given the planned expansion of FilterResult state, it might be nice to + // pull this back and not expose anything other than its bounding box. This will be possible if + // all rendering can be handled by functions defined on FilterResult. + const SkSpecialImage* image() const { return fImage.get(); } + sk_sp refImage() const { return fImage; } + + // Get the layer-space bounds of the result. This will incorporate any layer-space transform. + LayerSpace layerBounds() const { + return fLayerBounds; + } + + // Produce a new FilterResult that has been cropped to 'crop', taking into account the context's + // desired output. When possible, the returned FilterResult will reuse the underlying image and + // adjust its metadata. This will depend on the current transform and tile mode as well as how + // the crop rect intersects this result's layer bounds. + // TODO (michaelludwig): All FilterResults are decal mode and there are no current usages that + // require force-padding a decal FilterResult so these arguments aren't implemented yet. + FilterResult applyCrop(const Context& ctx, + const LayerSpace& crop) const; + // SkTileMode newTileMode=SkTileMode::kDecal, + // bool forcePad=false) const; + + // Produce a new FilterResult that is the transformation of this FilterResult. When this + // result's sampling and transform are compatible with the new transformation, the returned + // FilterResult can reuse the same image data and adjust just the metadata. + FilterResult applyTransform(const Context& ctx, + const LayerSpace& transform, + const SkSamplingOptions& sampling) const; + + // Extract image and origin, safely when the image is null. If there are deferred operations + // on FilterResult (such as tiling or transforms) not representable as an image+origin pair, + // the returned image will be the resolution resulting from that metadata and not necessarily + // equal to the original 'image()'. + // TODO (michaelludwig) - This is intended for convenience until all call sites of + // SkImageFilter_Base::filterImage() have been updated to work in the new type system + // (which comes later as SkDevice, SkCanvas, etc. need to be modified, and coordinate space + // tagging needs to be added). + sk_sp imageAndOffset(SkIPoint* offset) const; + +private: + // Renders this FilterResult into a new, but visually equivalent, image that fills 'dstBounds', + // has nearest-neighbor sampling, and a transform that just translates by 'dstBounds' TL corner. + std::pair, LayerSpace> + resolve(LayerSpace dstBounds) const; + + // Update metadata to concat the given transform directly. + void concatTransform(const LayerSpace& transform, + const SkSamplingOptions& newSampling, + const LayerSpace& outputBounds); + + // The effective image of a FilterResult is 'fImage' sampled by 'fSamplingOptions' and + // respecting 'fTileMode' (on the SkSpecialImage's subset), transformed by 'fTransform', clipped + // to 'fLayerBounds'. + sk_sp fImage; + SkSamplingOptions fSamplingOptions; + // SkTileMode fTileMode = SkTileMode::kDecal; + // Typically this will be an integer translation that encodes the origin of the top left corner, + // but can become more complex when combined with applyTransform(). + LayerSpace fTransform; + + // The layer bounds are initially fImage's dimensions mapped by fTransform. As the filter result + // is processed by the image filter DAG, it can be further restricted by crop rects or the + // implicit desired output at each node. + LayerSpace fLayerBounds; +}; + +// The context contains all necessary information to describe how the image filter should be +// computed (i.e. the current layer matrix and clip), and the color information of the output of a +// filter DAG. For now, this is just the color space (of the original requesting device). This is +// used when constructing intermediate rendering surfaces, so that we ensure we land in a surface +// that's similar/compatible to the final consumer of the DAG's output. +class Context { +public: + // Creates a context with the given layer matrix and destination clip, reading from 'source' + // with an origin of (0,0). + Context(const SkMatrix& layerMatrix, const SkIRect& clipBounds, SkImageFilterCache* cache, + SkColorType colorType, SkColorSpace* colorSpace, const SkSpecialImage* source) + : fMapping(layerMatrix) + , fDesiredOutput(clipBounds) + , fCache(cache) + , fColorType(colorType) + , fColorSpace(colorSpace) + , fSource(sk_ref_sp(source), LayerSpace({0, 0})) {} + + Context(const Mapping& mapping, const LayerSpace& desiredOutput, + SkImageFilterCache* cache, SkColorType colorType, SkColorSpace* colorSpace, + const FilterResult& source) + : fMapping(mapping) + , fDesiredOutput(desiredOutput) + , fCache(cache) + , fColorType(colorType) + , fColorSpace(colorSpace) + , fSource(source) {} + + // The mapping that defines the transformation from local parameter space of the filters to the + // layer space where the image filters are evaluated, as well as the remaining transformation + // from the layer space to the final device space. The layer space defined by the returned + // Mapping may be the same as the root device space, or be an intermediate space that is + // supported by the image filter DAG (depending on what it returns from getCTMCapability()). + // If a node returns something other than kComplex from getCTMCapability(), the layer matrix of + // the mapping will respect that return value, and the remaining matrix will be appropriately + // set to transform the layer space to the final device space (applied by the SkCanvas when + // filtering is finished). + const Mapping& mapping() const { return fMapping; } + // DEPRECATED: Use mapping() and its coordinate-space types instead + const SkMatrix& ctm() const { return fMapping.layerMatrix(); } + // The bounds, in the layer space, that the filtered image will be clipped to. The output + // from filterImage() must cover these clip bounds, except in areas where it will just be + // transparent black, in which case a smaller output image can be returned. + const LayerSpace& desiredOutput() const { return fDesiredOutput; } + // DEPRECATED: Use desiredOutput() instead + const SkIRect& clipBounds() const { return static_cast(fDesiredOutput); } + // The cache to use when recursing through the filter DAG, in order to avoid repeated + // calculations of the same image. + SkImageFilterCache* cache() const { return fCache; } + // The output device's color type, which can be used for intermediate images to be + // compatible with the eventual target of the filtered result. + SkColorType colorType() const { return fColorType; } +#if defined(SK_GANESH) + GrColorType grColorType() const { return SkColorTypeToGrColorType(fColorType); } +#endif + // The output device's color space, so intermediate images can match, and so filtering can + // be performed in the destination color space. + SkColorSpace* colorSpace() const { return fColorSpace; } + sk_sp refColorSpace() const { return sk_ref_sp(fColorSpace); } + // The default surface properties to use when making transient surfaces during filtering. + const SkSurfaceProps& surfaceProps() const { return fSource.image()->props(); } + + // This is the image to use whenever an expected input filter has been set to null. In the + // majority of cases, this is the original source image for the image filter DAG so it comes + // from the SkDevice that holds either the saveLayer or the temporary rendered result. The + // exception is composing two image filters (via SkImageFilters::Compose), which must use + // the output of the inner DAG as the "source" for the outer DAG. + const FilterResult& source() const { return fSource; } + // DEPRECATED: Use source() instead to get both the image and its origin. + const SkSpecialImage* sourceImage() const { return fSource.image(); } + + // True if image filtering should occur on the GPU if possible. + bool gpuBacked() const { return fSource.image()->isTextureBacked(); } + // The recording context to use when computing the filter with the GPU. + GrRecordingContext* getContext() const { return fSource.image()->getContext(); } + + /** + * Since a context can be built directly, its constructor has no chance to "return null" if + * it's given invalid or unsupported inputs. Call this to know of the the context can be + * used. + * + * The SkImageFilterCache Key, for example, requires a finite ctm (no infinities or NaN), + * so that test is part of isValid. + */ + bool isValid() const { return fSource.image() != nullptr && fMapping.layerMatrix().isFinite(); } + + // Create a surface of the given size, that matches the context's color type and color space + // as closely as possible, and uses the same backend of the device that produced the source + // image. + sk_sp makeSurface(const SkISize& size, + const SkSurfaceProps* props = nullptr) const { + if (!props) { + props = &this->surfaceProps(); + } + return fSource.image()->makeSurface(fColorType, fColorSpace, size, + kPremul_SkAlphaType, *props); + } + + // Create a new context that matches this context, but with an overridden layer space. + Context withNewMapping(const Mapping& mapping) const { + return Context(mapping, fDesiredOutput, fCache, fColorType, fColorSpace, fSource); + } + // Create a new context that matches this context, but with an overridden desired output rect. + Context withNewDesiredOutput(const LayerSpace& desiredOutput) const { + return Context(fMapping, desiredOutput, fCache, fColorType, fColorSpace, fSource); + } + +private: + Mapping fMapping; + LayerSpace fDesiredOutput; + SkImageFilterCache* fCache; + SkColorType fColorType; + // The pointed-to object is owned by the device controlling the filter process, and our lifetime + // is bounded by the device, so this can be a bare pointer. + SkColorSpace* fColorSpace; + FilterResult fSource; +}; + +} // end namespace skif + +#endif // SkImageFilterTypes_DEFINED diff --git a/gfx/skia/skia/src/core/SkImageFilter_Base.h b/gfx/skia/skia/src/core/SkImageFilter_Base.h new file mode 100644 index 0000000000..48dfc94101 --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageFilter_Base.h @@ -0,0 +1,492 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageFilter_Base_DEFINED +#define SkImageFilter_Base_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTemplates.h" + +#include "src/core/SkImageFilterTypes.h" + +class GrFragmentProcessor; +class GrRecordingContext; + +// True base class that all SkImageFilter implementations need to extend from. This provides the +// actual API surface that Skia will use to compute the filtered images. +class SkImageFilter_Base : public SkImageFilter { +public: + // DEPRECATED - Use skif::Context directly. + using Context = skif::Context; + + /** + * Request a new filtered image to be created from the src image. The returned skif::Image + * provides both the pixel data and the origin point that it should be drawn at, relative to + * the layer space defined by the provided context. + * + * If the result image cannot be created, or the result would be transparent black, returns + * a skif::Image that has a null special image, in which its origin should be ignored. + * + * TODO: Right now the imagefilters sometimes return empty result bitmaps/ + * specialimages. That doesn't seem quite right. + */ + skif::FilterResult filterImage(const skif::Context& context) const; + + /** + * Calculate the smallest-possible required layer bounds that would provide sufficient + * information to correctly compute the image filter for every pixel in the desired output + * bounds. The 'desiredOutput' is intended to represent either the root render target bounds, + * or the device-space bounds of the current clip. If the bounds of the content that will be + * drawn into the layer is known, 'knownContentBounds' should be provided, since it can be + * used to restrict the size of the layer if the image filter DAG does not affect transparent + * black. + * + * The returned rect is in the layer space defined by 'mapping', so it directly represents + * the size and location of the SkDevice created to rasterize the content prior to invoking the + * image filter (assuming its CTM and basis matrix are configured to match 'mapping'). + * + * While this operation transforms an device-space output bounds to a layer-space input bounds, + * it is not necessarily the inverse of getOutputBounds(). For instance, a blur needs to have + * an outset margin when reading pixels at the edge (to satisfy its kernel), thus it expands + * its required input rect to include every pixel that contributes to the desired output rect. + + * @param mapping The coordinate space mapping that defines both the transformation + * between local and layer, and layer to root device space, that will be + * used when the filter is later invoked. + * @param desiredOutput The desired output boundary that needs to be covered by the filter's + * output (assuming that the filter is then invoked with a suitable input) + * @param knownContentBounds + * Optional, the known layer-space bounds of the non-transparent content + * that would be rasterized in the source input image. + * + * @return The layer-space bounding box to use for an SkDevice when drawing the source image. + */ + skif::LayerSpace getInputBounds( + const skif::Mapping& mapping, const skif::DeviceSpace& desiredOutput, + const skif::ParameterSpace* knownContentBounds) const; + + /** + * Calculate the device-space bounds of the output of this filter DAG, if it were to process + * an image layer covering the 'contentBounds'. The 'mapping' defines how the content will be + * transformed to layer space when it is drawn, and how the output filter image is then + * transformed to the final device space (i.e. it specifies the mapping between the root device + * space and the parameter space of the initially provided content). + * + * While this operation transforms a parameter-space input bounds to an device-space output + * bounds, it is not necessarily the inverse of getInputBounds(). For instance, a blur needs to + * have an outset margin when reading pixels at the edge (to satisfy its kernel), so it will + * generate a result larger than its input (so that the blur is visible) and, thus, expands its + * output to include every pixel that it will touch. + * + * @param mapping The coordinate space mapping that defines both the transformation + * between local and layer, and layer to root device space, that will be + * used when the filter is later invoked. + * @param contentBounds The local-space bounds of the non-transparent content that would be + * drawn into the source image prior to filtering with this DAG, i.e. + * the same as 'knownContentBounds' in getInputBounds(). + * + * @return The root device-space bounding box of the filtered image, were it applied to + * content contained by 'contentBounds' and then drawn with 'mapping' to the root + * device (w/o any additional clipping). + */ + skif::DeviceSpace getOutputBounds( + const skif::Mapping& mapping, const skif::ParameterSpace& contentBounds) const; + + // Returns true if this image filter graph transforms a source transparent black pixel to a + // color other than transparent black. + bool affectsTransparentBlack() const; + + /** + * Most ImageFilters can natively handle scaling and translate components in the CTM. Only + * some of them can handle affine (or more complex) matrices. Some may only handle translation. + * This call returns the maximum "kind" of CTM for a filter and all of its (non-null) inputs. + */ + enum class MatrixCapability { + kTranslate, + kScaleTranslate, + kComplex, + }; + MatrixCapability getCTMCapability() const; + + uint32_t uniqueID() const { return fUniqueID; } + + static SkFlattenable::Type GetFlattenableType() { + return kSkImageFilter_Type; + } + + SkFlattenable::Type getFlattenableType() const override { + return kSkImageFilter_Type; + } + +protected: + // DEPRECATED: Will be removed once cropping is handled by a standalone image filter + class CropRect { + public: + enum CropEdge { + kHasLeft_CropEdge = 0x01, + kHasTop_CropEdge = 0x02, + kHasWidth_CropEdge = 0x04, + kHasHeight_CropEdge = 0x08, + kHasAll_CropEdge = 0x0F, + }; + CropRect() : fFlags(0) {} + explicit CropRect(const SkRect* rect) + : fRect(rect ? *rect : SkRect::MakeEmpty()), fFlags(rect ? kHasAll_CropEdge : 0x0) {} + + // CropRect(const CropRect&) = default; + + uint32_t flags() const { return fFlags; } + const SkRect& rect() const { return fRect; } + + /** + * Apply this cropRect to the imageBounds. If a given edge of the cropRect is not set, then + * the corresponding edge from imageBounds will be used. If "embiggen" is true, the crop + * rect is allowed to enlarge the size of the rect, otherwise it may only reduce the rect. + * Filters that can affect transparent black should pass "true", while all other filters + * should pass "false". + * + * Note: imageBounds is in "device" space, as the output cropped rectangle will be, so the + * matrix is ignored for those. It is only applied to the cropRect's bounds. + */ + void applyTo(const SkIRect& imageBounds, const SkMatrix& matrix, bool embiggen, + SkIRect* cropped) const; + + private: + SkRect fRect; + uint32_t fFlags; + }; + + class Common { + public: + /** + * Attempt to unflatten the cropRect and the expected number of input filters. + * If any number of input filters is valid, pass -1. + * If this fails (i.e. corrupt buffer or contents) then return false and common will + * be left uninitialized. + * If this returns true, then inputCount() is the number of found input filters, each + * of which may be NULL or a valid imagefilter. + */ + bool unflatten(SkReadBuffer&, int expectedInputs); + + const SkRect* cropRect() const { + return fCropRect.flags() != 0x0 ? &fCropRect.rect() : nullptr; + } + int inputCount() const { return fInputs.size(); } + sk_sp* inputs() { return fInputs.begin(); } + + sk_sp getInput(int index) { return fInputs[index]; } + + private: + CropRect fCropRect; + // most filters accept at most 2 input-filters + SkSTArray<2, sk_sp, true> fInputs; + }; + + // Whether or not to recurse to child input filters for certain operations that walk the DAG. + enum class VisitChildren : bool { + kNo = false, + kYes = true + }; + + SkImageFilter_Base(sk_sp const* inputs, int inputCount, + const SkRect* cropRect); + + ~SkImageFilter_Base() override; + + void flatten(SkWriteBuffer&) const override; + + // DEPRECATED - Use the private context-only variant + virtual sk_sp onFilterImage(const Context&, SkIPoint* offset) const { + return nullptr; + } + + // DEPRECATED - Override onGetOutputLayerBounds and onGetInputLayerBounds instead. The + // node-specific and aggregation functions are no longer separated in the current API. A helper + // function is provided to do the default recursion for the common filter case. + virtual SkIRect onFilterBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const; + virtual SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const; + + // DEPRECRATED - Call the Context-only filterInput() + sk_sp filterInput(int index, const Context& ctx, SkIPoint* offset) const { + return this->filterInput(index, ctx).imageAndOffset(offset); + } + + // Helper function to visit each of this filter's child filters and call their + // onGetInputLayerBounds with the provided 'desiredOutput' and 'contentBounds'. Automatically + // handles null input filters. Returns the union of all of the children's input bounds. + skif::LayerSpace visitInputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds) const; + // Helper function to visit each of this filter's child filters and call their + // onGetOutputLayerBounds with the provided 'contentBounds'. Automatically handles null input + // filters. + skif::LayerSpace visitOutputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& contentBounds) const; + + // Helper function for recursing through the filter DAG. It automatically evaluates the input + // image filter at 'index' using the given context. If the input image filter is null, it + // automatically returns the context's dynamic source image. + // + // Implementations must handle cases when the input filter was unable to compute an image and + // the returned skif::Image has a null SkSpecialImage. If the filter affects transparent black, + // it should treat null results or images that do not fully cover the requested output bounds as + // being transparent black in those regions. Filters that do not affect transparent black can + // exit early since the null image would remain transparent. + skif::FilterResult filterInput(int index, const skif::Context& ctx) const; + + /** + * Returns whether any edges of the crop rect have been set. The crop + * rect is set at construction time, and determines which pixels from the + * input image will be processed, and which pixels in the output image will be allowed. + * The size of the crop rect should be + * used as the size of the destination image. The origin of this rect + * should be used to offset access to the input images, and should also + * be added to the "offset" parameter in onFilterImage. + * + * DEPRECATED - Remove once cropping is handled by a separate filter + */ + bool cropRectIsSet() const { return fCropRect.flags() != 0x0; } + + // DEPRECATED - Remove once cropping is handled by a separate filter + CropRect getCropRect() const { return fCropRect; } + + // DEPRECATED - Remove once cropping is handled by a separate filter + const CropRect* getCropRectIfSet() const { + return this->cropRectIsSet() ? &fCropRect : nullptr; + } + + /** Given a "srcBounds" rect, computes destination bounds for this filter. + * "dstBounds" are computed by transforming the crop rect by the context's + * CTM, applying it to the initial bounds, and intersecting the result with + * the context's clip bounds. "srcBounds" (if non-null) are computed by + * intersecting the initial bounds with "dstBounds", to ensure that we never + * sample outside of the crop rect (this restriction may be relaxed in the + * future). + * + * DEPRECATED - Remove once cropping is handled by a separate filter, although it may be + * necessary to provide a similar convenience function to compute the output bounds given the + * images returned by filterInput(). + */ + bool applyCropRect(const Context&, const SkIRect& srcBounds, SkIRect* dstBounds) const; + + /** A variant of the above call which takes the original source bitmap and + * source offset. If the resulting crop rect is not entirely contained by + * the source bitmap's bounds, it creates a new bitmap in "result" and + * pads the edges with transparent black. In that case, the srcOffset is + * modified to be the same as the bounds, since no further adjustment is + * needed by the caller. This version should only be used by filters + * which are not capable of processing a smaller source bitmap into a + * larger destination. + * + * DEPRECATED - Remove once cropping is handled by a separate filter. + */ + sk_sp applyCropRectAndPad(const Context&, SkSpecialImage* src, + SkIPoint* srcOffset, SkIRect* bounds) const; + + /** + * Creates a modified Context for use when recursing up the image filter DAG. + * The clip bounds are adjusted to accommodate any margins that this + * filter requires by calling this node's + * onFilterNodeBounds(..., kReverse_MapDirection). + */ + // TODO (michaelludwig) - I don't think this is necessary to keep as protected. Other than the + // real use case in recursing through the DAG for filterInput(), it feels wrong for blur and + // other filters to need to call it. + Context mapContext(const Context& ctx) const; + +#if defined(SK_GANESH) + static sk_sp DrawWithFP(GrRecordingContext* context, + std::unique_ptr fp, + const SkIRect& bounds, + SkColorType colorType, + const SkColorSpace* colorSpace, + const SkSurfaceProps&, + GrSurfaceOrigin surfaceOrigin, + GrProtected isProtected = GrProtected::kNo); + + /** + * Returns a version of the passed-in image (possibly the original), that is in a colorspace + * with the same gamut as the one from the OutputProperties. This allows filters that do many + * texture samples to guarantee that any color space conversion has happened before running. + */ + static sk_sp ImageToColorSpace(SkSpecialImage* src, + SkColorType colorType, + SkColorSpace* colorSpace, + const SkSurfaceProps&); +#endif + + // If 'srcBounds' will sample outside the border of 'originalSrcBounds' (i.e., the sample + // will wrap around to the other side) we must preserve the far side of the src along that + // axis (e.g., if we will sample beyond the left edge of the src, the right side must be + // preserved for the repeat sampling to work). + // DEPRECATED - Remove once cropping is handled by a separate filter, that can also handle all + // tile modes (including repeat) properly + static SkIRect DetermineRepeatedSrcBound(const SkIRect& srcBounds, + const SkIVector& filterOffset, + const SkISize& filterSize, + const SkIRect& originalSrcBounds); + +private: + friend class SkImageFilter; + // For PurgeCache() + friend class SkGraphics; + + static void PurgeCache(); + + // Configuration points for the filter implementation, marked private since they should not + // need to be invoked by the subclasses. These refer to the node's specific behavior and are + // not responsible for aggregating the behavior of the entire filter DAG. + + /** + * Return true (and returns a ref'd colorfilter) if this node in the DAG is just a colorfilter + * w/o CropRect constraints. + */ + virtual bool onIsColorFilterNode(SkColorFilter** /*filterPtr*/) const { return false; } + + /** + * Return the most complex matrix type this filter can support (mapping from its parameter + * space to a layer space). If this returns anything less than kComplex, the filter only needs + * to worry about mapping from parameter to layer using a matrix that is constrained in that + * way (eg, scale+translate). + */ + virtual MatrixCapability onGetCTMCapability() const { + return MatrixCapability::kScaleTranslate; + } + + /** + * Return true if this filter would transform transparent black pixels to a color other than + * transparent black. When false, optimizations can be taken to discard regions known to be + * transparent black and thus process fewer pixels. + */ + virtual bool onAffectsTransparentBlack() const { return false; } + + /** + * This is the virtual which should be overridden by the derived class to perform image + * filtering. Subclasses are responsible for recursing to their input filters, although the + * filterInput() function is provided to handle all necessary details of this. + * + * If the image cannot be created (either because of an error or if the result would be empty + * because it was clipped out), this should return a filtered Image with a null SkSpecialImage. + * In these situations, callers that do not affect transparent black can end early, since the + * "transparent" implicit image would be unchanged. Callers that affect transparent black need + * to safely handle these null and empty images and return an image filling the context's clip + * bounds as if its input filtered image were transparent black. + */ + virtual skif::FilterResult onFilterImage(const skif::Context& context) const; + + /** + * Calculates the necessary input layer size in order for the final output of the filter to + * cover the desired output bounds. The provided 'desiredOutput' represents the requested + * input bounds for this node's parent filter node, i.e. this function answers "what does this + * node require for input in order to satisfy (as its own output), the input needs of its + * parent?". + * + * If 'recurse' is true, this function is responsible for recursing to its child image filters + * and accounting for what they require to meet this filter's input requirements. It is up to + * the filter to determine how to aggregate these inputs, but a helper function is provided for + * the common case where the final required layer size is the union of the child filters' + * required inputs, evaluated on what this filter requires for itself. 'recurse' is kNo + * when mapping Contexts while actually filtering images, since the child recursion is + * happening at a higher level. + * + * Unlike the public getInputBounds(), all internal bounds calculations are done in the shared + * layer space defined by 'mapping'. + * + * The default implementation assumes that current filter requires an input equal to + * 'desiredOutputBounds', and passes this down to its child filters, and returns the union of + * their required inputs. + */ + virtual skif::LayerSpace onGetInputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds, + VisitChildren recurse = VisitChildren::kYes) const; + + /** + * Calculates the output bounds that this filter node would touch when processing an input + * sized to 'contentBounds'. This function is responsible for recursing to its child image + * filters and accounting for what they output. It is up to the filter to determine how to + * aggregate the outputs of its children, but a helper function is provided for the common + * case where the filter output is the union of its child outputs. + * + * Unlike the public getOutputBounds(), all internal bounds calculations are done in the + * shared layer space defined by 'mapping'. + * + * The default implementation assumes that the output of this filter is equal to the union of + * the outputs of its child filters evaluated with 'contentBounds'. + */ + // TODO (michaelludwig) - When layerMatrix = I, this function could be used to implement + // onComputeFastBounds() instead of making filters implement the essentially the same calcs x2 + virtual skif::LayerSpace onGetOutputLayerBounds( + const skif::Mapping& mapping, const skif::LayerSpace& contentBounds) const; + + skia_private::AutoSTArray<2, sk_sp> fInputs; + + bool fUsesSrcInput; + CropRect fCropRect; + uint32_t fUniqueID; // Globally unique + + using INHERITED = SkImageFilter; +}; + +static inline SkImageFilter_Base* as_IFB(SkImageFilter* filter) { + return static_cast(filter); +} + +static inline SkImageFilter_Base* as_IFB(const sk_sp& filter) { + return static_cast(filter.get()); +} + +static inline const SkImageFilter_Base* as_IFB(const SkImageFilter* filter) { + return static_cast(filter); +} + +/** + * Helper to unflatten the common data, and return nullptr if we fail. + */ +#define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount) \ + Common localVar; \ + do { \ + if (!localVar.unflatten(buffer, expectedCount)) { \ + return nullptr; \ + } \ + } while (0) + + +/** + * All image filter implementations defined for the include/effects/SkImageFilters.h factories + * are entirely encapsulated within their own CPP files. SkFlattenable deserialization needs a hook + * into these types, so their registration functions are exposed here. + */ +void SkRegisterAlphaThresholdImageFilterFlattenable(); +void SkRegisterArithmeticImageFilterFlattenable(); +void SkRegisterBlendImageFilterFlattenable(); +void SkRegisterBlurImageFilterFlattenable(); +void SkRegisterColorFilterImageFilterFlattenable(); +void SkRegisterComposeImageFilterFlattenable(); +void SkRegisterCropImageFilterFlattenable(); +void SkRegisterDisplacementMapImageFilterFlattenable(); +void SkRegisterDropShadowImageFilterFlattenable(); +void SkRegisterImageImageFilterFlattenable(); +void SkRegisterLightingImageFilterFlattenables(); +void SkRegisterMagnifierImageFilterFlattenable(); +void SkRegisterMatrixConvolutionImageFilterFlattenable(); +void SkRegisterMatrixTransformImageFilterFlattenable(); +void SkRegisterMergeImageFilterFlattenable(); +void SkRegisterMorphologyImageFilterFlattenables(); +void SkRegisterPictureImageFilterFlattenable(); +#ifdef SK_ENABLE_SKSL +void SkRegisterRuntimeImageFilterFlattenable(); +#endif +void SkRegisterShaderImageFilterFlattenable(); +void SkRegisterTileImageFilterFlattenable(); + +#endif // SkImageFilter_Base_DEFINED diff --git a/gfx/skia/skia/src/core/SkImageGenerator.cpp b/gfx/skia/skia/src/core/SkImageGenerator.cpp new file mode 100644 index 0000000000..9c15b5654d --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageGenerator.cpp @@ -0,0 +1,123 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImageGenerator.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorType.h" +#include "include/core/SkGraphics.h" +#include "include/core/SkSize.h" +#include "include/private/base/SkAssert.h" +#include "src/core/SkNextID.h" + +#include + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#endif + +SkImageGenerator::SkImageGenerator(const SkImageInfo& info, uint32_t uniqueID) + : fInfo(info) + , fUniqueID(kNeedNewImageUniqueID == uniqueID ? SkNextID::ImageID() : uniqueID) +{} + +bool SkImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) { + if (kUnknown_SkColorType == info.colorType()) { + return false; + } + if (nullptr == pixels) { + return false; + } + if (rowBytes < info.minRowBytes()) { + return false; + } + + Options defaultOpts; + return this->onGetPixels(info, pixels, rowBytes, defaultOpts); +} + +bool SkImageGenerator::queryYUVAInfo(const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes, + SkYUVAPixmapInfo* yuvaPixmapInfo) const { + SkASSERT(yuvaPixmapInfo); + + return this->onQueryYUVAInfo(supportedDataTypes, yuvaPixmapInfo) && + yuvaPixmapInfo->isSupported(supportedDataTypes); +} + +bool SkImageGenerator::getYUVAPlanes(const SkYUVAPixmaps& yuvaPixmaps) { + return this->onGetYUVAPlanes(yuvaPixmaps); +} + +#if defined(SK_GANESH) +GrSurfaceProxyView SkImageGenerator::generateTexture(GrRecordingContext* ctx, + const SkImageInfo& info, + GrMipmapped mipmapped, + GrImageTexGenPolicy texGenPolicy) { + SkASSERT_RELEASE(fInfo.dimensions() == info.dimensions()); + + if (!ctx || ctx->abandoned()) { + return {}; + } + + return this->onGenerateTexture(ctx, info, mipmapped, texGenPolicy); +} + +GrSurfaceProxyView SkImageGenerator::onGenerateTexture(GrRecordingContext*, + const SkImageInfo&, + GrMipmapped, + GrImageTexGenPolicy) { + return {}; +} +#endif // defined(SK_GANESH) + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Image_Graphite.h" + +sk_sp SkImageGenerator::makeTextureImage(skgpu::graphite::Recorder* recorder, + const SkImageInfo& info, + skgpu::Mipmapped mipmapped) { + // This still allows for a difference in colorType and colorSpace. Just no subsetting. + if (fInfo.dimensions() != info.dimensions()) { + return nullptr; + } + + return this->onMakeTextureImage(recorder, info, mipmapped); +} + +sk_sp SkImageGenerator::onMakeTextureImage(skgpu::graphite::Recorder*, + const SkImageInfo&, + skgpu::Mipmapped) { + return nullptr; +} + +#endif // SK_GRAPHITE + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static SkGraphics::ImageGeneratorFromEncodedDataFactory gFactory; + +SkGraphics::ImageGeneratorFromEncodedDataFactory +SkGraphics::SetImageGeneratorFromEncodedDataFactory(ImageGeneratorFromEncodedDataFactory factory) +{ + ImageGeneratorFromEncodedDataFactory prev = gFactory; + gFactory = factory; + return prev; +} + +std::unique_ptr SkImageGenerator::MakeFromEncoded( + sk_sp data, std::optional at) { + if (!data || at == kOpaque_SkAlphaType) { + return nullptr; + } + if (gFactory) { + if (std::unique_ptr generator = gFactory(data)) { + return generator; + } + } + return SkImageGenerator::MakeFromEncodedImpl(std::move(data), at); +} diff --git a/gfx/skia/skia/src/core/SkImageInfo.cpp b/gfx/skia/skia/src/core/SkImageInfo.cpp new file mode 100644 index 0000000000..b717c07d97 --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageInfo.cpp @@ -0,0 +1,236 @@ +/* + * Copyright 2010 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImageInfo.h" + +#include "include/core/SkColor.h" +#include "include/core/SkColorSpace.h" +#include "include/private/base/SkAssert.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkImageInfoPriv.h" + +int SkColorTypeBytesPerPixel(SkColorType ct) { + switch (ct) { + case kUnknown_SkColorType: return 0; + case kAlpha_8_SkColorType: return 1; + case kRGB_565_SkColorType: return 2; + case kARGB_4444_SkColorType: return 2; + case kRGBA_8888_SkColorType: return 4; + case kBGRA_8888_SkColorType: return 4; + case kRGB_888x_SkColorType: return 4; + case kRGBA_1010102_SkColorType: return 4; + case kRGB_101010x_SkColorType: return 4; + case kBGRA_1010102_SkColorType: return 4; + case kBGR_101010x_SkColorType: return 4; + case kBGR_101010x_XR_SkColorType: return 4; + case kGray_8_SkColorType: return 1; + case kRGBA_F16Norm_SkColorType: return 8; + case kRGBA_F16_SkColorType: return 8; + case kRGBA_F32_SkColorType: return 16; + case kR8G8_unorm_SkColorType: return 2; + case kA16_unorm_SkColorType: return 2; + case kR16G16_unorm_SkColorType: return 4; + case kA16_float_SkColorType: return 2; + case kR16G16_float_SkColorType: return 4; + case kR16G16B16A16_unorm_SkColorType: return 8; + case kSRGBA_8888_SkColorType: return 4; + case kR8_unorm_SkColorType: return 1; + } + SkUNREACHABLE; +} + +bool SkColorTypeIsAlwaysOpaque(SkColorType ct) { + return !(SkColorTypeChannelFlags(ct) & kAlpha_SkColorChannelFlag); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkColorInfo::SkColorInfo() = default; +SkColorInfo::~SkColorInfo() = default; + +SkColorInfo::SkColorInfo(SkColorType ct, SkAlphaType at, sk_sp cs) + : fColorSpace(std::move(cs)), fColorType(ct), fAlphaType(at) {} + +SkColorInfo::SkColorInfo(const SkColorInfo&) = default; +SkColorInfo::SkColorInfo(SkColorInfo&&) = default; + +SkColorInfo& SkColorInfo::operator=(const SkColorInfo&) = default; +SkColorInfo& SkColorInfo::operator=(SkColorInfo&&) = default; + +SkColorSpace* SkColorInfo::colorSpace() const { return fColorSpace.get(); } +sk_sp SkColorInfo::refColorSpace() const { return fColorSpace; } + +bool SkColorInfo::operator==(const SkColorInfo& other) const { + return fColorType == other.fColorType && fAlphaType == other.fAlphaType && + SkColorSpace::Equals(fColorSpace.get(), other.fColorSpace.get()); +} + +bool SkColorInfo::operator!=(const SkColorInfo& other) const { return !(*this == other); } + +SkColorInfo SkColorInfo::makeAlphaType(SkAlphaType newAlphaType) const { + return SkColorInfo(this->colorType(), newAlphaType, this->refColorSpace()); +} + +SkColorInfo SkColorInfo::makeColorType(SkColorType newColorType) const { + return SkColorInfo(newColorType, this->alphaType(), this->refColorSpace()); +} + +SkColorInfo SkColorInfo::makeColorSpace(sk_sp cs) const { + return SkColorInfo(this->colorType(), this->alphaType(), std::move(cs)); +} + +int SkColorInfo::bytesPerPixel() const { return SkColorTypeBytesPerPixel(fColorType); } + +bool SkColorInfo::gammaCloseToSRGB() const { + return fColorSpace && fColorSpace->gammaCloseToSRGB(); +} + +int SkColorInfo::shiftPerPixel() const { return SkColorTypeShiftPerPixel(fColorType); } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +size_t SkImageInfo::computeOffset(int x, int y, size_t rowBytes) const { + SkASSERT((unsigned)x < (unsigned)this->width()); + SkASSERT((unsigned)y < (unsigned)this->height()); + return SkColorTypeComputeOffset(this->colorType(), x, y, rowBytes); +} + +size_t SkImageInfo::computeByteSize(size_t rowBytes) const { + if (0 == this->height()) { + return 0; + } + SkSafeMath safe; + size_t bytes = safe.add(safe.mul(safe.addInt(this->height(), -1), rowBytes), + safe.mul(this->width(), this->bytesPerPixel())); + + // The CPU backend implements some memory operations on images using instructions that take a + // signed 32-bit offset from the base. If we ever make an image larger than that, overflow can + // cause us to read/write memory that starts 2GB *before* the buffer. (crbug.com/1264705) + constexpr size_t kMaxSigned32BitSize = SK_MaxS32; + return (safe.ok() && (bytes <= kMaxSigned32BitSize)) ? bytes : SIZE_MAX; +} + +SkColorSpace* SkImageInfo::colorSpace() const { return fColorInfo.colorSpace(); } + +sk_sp SkImageInfo::refColorSpace() const { return fColorInfo.refColorSpace(); } + +SkImageInfo SkImageInfo::makeColorSpace(sk_sp cs) const { + return Make(fDimensions, fColorInfo.makeColorSpace(std::move(cs))); +} + +SkImageInfo SkImageInfo::Make(int width, int height, SkColorType ct, SkAlphaType at) { + return Make(width, height, ct, at, nullptr); +} + +SkImageInfo SkImageInfo::Make(int width, int height, SkColorType ct, SkAlphaType at, + sk_sp cs) { + return SkImageInfo({width, height}, {ct, at, std::move(cs)}); +} + +SkImageInfo SkImageInfo::Make(SkISize dimensions, SkColorType ct, SkAlphaType at) { + return Make(dimensions, ct, at, nullptr); +} + +SkImageInfo SkImageInfo::Make(SkISize dimensions, SkColorType ct, SkAlphaType at, + sk_sp cs) { + return SkImageInfo(dimensions, {ct, at, std::move(cs)}); +} + +SkImageInfo SkImageInfo::MakeN32(int width, int height, SkAlphaType at) { + return MakeN32(width, height, at, nullptr); +} + +SkImageInfo SkImageInfo::MakeN32(int width, int height, SkAlphaType at, sk_sp cs) { + return Make({width, height}, kN32_SkColorType, at, std::move(cs)); +} + +SkImageInfo SkImageInfo::MakeS32(int width, int height, SkAlphaType at) { + return SkImageInfo({width, height}, {kN32_SkColorType, at, SkColorSpace::MakeSRGB()}); +} + +SkImageInfo SkImageInfo::MakeN32Premul(int width, int height) { + return MakeN32Premul(width, height, nullptr); +} + +SkImageInfo SkImageInfo::MakeN32Premul(int width, int height, sk_sp cs) { + return Make({width, height}, kN32_SkColorType, kPremul_SkAlphaType, std::move(cs)); +} + +SkImageInfo SkImageInfo::MakeN32Premul(SkISize dimensions) { + return MakeN32Premul(dimensions, nullptr); +} + +SkImageInfo SkImageInfo::MakeN32Premul(SkISize dimensions, sk_sp cs) { + return Make(dimensions, kN32_SkColorType, kPremul_SkAlphaType, std::move(cs)); +} + +SkImageInfo SkImageInfo::MakeA8(int width, int height) { + return Make({width, height}, kAlpha_8_SkColorType, kPremul_SkAlphaType, nullptr); +} + +SkImageInfo SkImageInfo::MakeA8(SkISize dimensions) { + return Make(dimensions, kAlpha_8_SkColorType, kPremul_SkAlphaType, nullptr); +} + +SkImageInfo SkImageInfo::MakeUnknown(int width, int height) { + return Make({width, height}, kUnknown_SkColorType, kUnknown_SkAlphaType, nullptr); +} + +#ifdef SK_DEBUG +void SkImageInfo::validate() const { + SkASSERT(fDimensions.width() >= 0); + SkASSERT(fDimensions.height() >= 0); + SkASSERT(SkColorTypeIsValid(this->colorType())); + SkASSERT(SkAlphaTypeIsValid(this->alphaType())); +} +#endif + +bool SkColorTypeValidateAlphaType(SkColorType colorType, SkAlphaType alphaType, + SkAlphaType* canonical) { + switch (colorType) { + case kUnknown_SkColorType: + alphaType = kUnknown_SkAlphaType; + break; + case kAlpha_8_SkColorType: // fall-through + case kA16_unorm_SkColorType: // fall-through + case kA16_float_SkColorType: + if (kUnpremul_SkAlphaType == alphaType) { + alphaType = kPremul_SkAlphaType; + } + [[fallthrough]]; + case kARGB_4444_SkColorType: + case kRGBA_8888_SkColorType: + case kSRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + case kRGBA_1010102_SkColorType: + case kBGRA_1010102_SkColorType: + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: + case kRGBA_F32_SkColorType: + case kR16G16B16A16_unorm_SkColorType: + if (kUnknown_SkAlphaType == alphaType) { + return false; + } + break; + case kGray_8_SkColorType: + case kR8G8_unorm_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16_float_SkColorType: + case kRGB_565_SkColorType: + case kRGB_888x_SkColorType: + case kRGB_101010x_SkColorType: + case kBGR_101010x_SkColorType: + case kBGR_101010x_XR_SkColorType: + case kR8_unorm_SkColorType: + alphaType = kOpaque_SkAlphaType; + break; + } + if (canonical) { + *canonical = alphaType; + } + return true; +} diff --git a/gfx/skia/skia/src/core/SkImageInfoPriv.h b/gfx/skia/skia/src/core/SkImageInfoPriv.h new file mode 100644 index 0000000000..2d42d5fdc5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkImageInfoPriv.h @@ -0,0 +1,203 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageInfoPriv_DEFINED +#define SkImageInfoPriv_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkImageInfo.h" + +static inline uint32_t SkColorTypeChannelFlags(SkColorType ct) { + switch (ct) { + case kUnknown_SkColorType: return 0; + case kAlpha_8_SkColorType: return kAlpha_SkColorChannelFlag; + case kRGB_565_SkColorType: return kRGB_SkColorChannelFlags; + case kARGB_4444_SkColorType: return kRGBA_SkColorChannelFlags; + case kRGBA_8888_SkColorType: return kRGBA_SkColorChannelFlags; + case kRGB_888x_SkColorType: return kRGB_SkColorChannelFlags; + case kBGRA_8888_SkColorType: return kRGBA_SkColorChannelFlags; + case kRGBA_1010102_SkColorType: return kRGBA_SkColorChannelFlags; + case kRGB_101010x_SkColorType: return kRGB_SkColorChannelFlags; + case kBGRA_1010102_SkColorType: return kRGBA_SkColorChannelFlags; + case kBGR_101010x_SkColorType: return kRGB_SkColorChannelFlags; + case kBGR_101010x_XR_SkColorType: return kRGB_SkColorChannelFlags; + case kGray_8_SkColorType: return kGray_SkColorChannelFlag; + case kRGBA_F16Norm_SkColorType: return kRGBA_SkColorChannelFlags; + case kRGBA_F16_SkColorType: return kRGBA_SkColorChannelFlags; + case kRGBA_F32_SkColorType: return kRGBA_SkColorChannelFlags; + case kR8G8_unorm_SkColorType: return kRG_SkColorChannelFlags; + case kA16_unorm_SkColorType: return kAlpha_SkColorChannelFlag; + case kR16G16_unorm_SkColorType: return kRG_SkColorChannelFlags; + case kA16_float_SkColorType: return kAlpha_SkColorChannelFlag; + case kR16G16_float_SkColorType: return kRG_SkColorChannelFlags; + case kR16G16B16A16_unorm_SkColorType: return kRGBA_SkColorChannelFlags; + case kSRGBA_8888_SkColorType: return kRGBA_SkColorChannelFlags; + case kR8_unorm_SkColorType: return kRed_SkColorChannelFlag; + } + SkUNREACHABLE; +} + +static inline bool SkColorTypeIsAlphaOnly(SkColorType ct) { + return SkColorTypeChannelFlags(ct) == kAlpha_SkColorChannelFlag; +} + +static inline bool SkAlphaTypeIsValid(unsigned value) { + return value <= kLastEnum_SkAlphaType; +} + +static int SkColorTypeShiftPerPixel(SkColorType ct) { + switch (ct) { + case kUnknown_SkColorType: return 0; + case kAlpha_8_SkColorType: return 0; + case kRGB_565_SkColorType: return 1; + case kARGB_4444_SkColorType: return 1; + case kRGBA_8888_SkColorType: return 2; + case kRGB_888x_SkColorType: return 2; + case kBGRA_8888_SkColorType: return 2; + case kRGBA_1010102_SkColorType: return 2; + case kRGB_101010x_SkColorType: return 2; + case kBGRA_1010102_SkColorType: return 2; + case kBGR_101010x_SkColorType: return 2; + case kBGR_101010x_XR_SkColorType: return 2; + case kGray_8_SkColorType: return 0; + case kRGBA_F16Norm_SkColorType: return 3; + case kRGBA_F16_SkColorType: return 3; + case kRGBA_F32_SkColorType: return 4; + case kR8G8_unorm_SkColorType: return 1; + case kA16_unorm_SkColorType: return 1; + case kR16G16_unorm_SkColorType: return 2; + case kA16_float_SkColorType: return 1; + case kR16G16_float_SkColorType: return 2; + case kR16G16B16A16_unorm_SkColorType: return 3; + case kSRGBA_8888_SkColorType: return 2; + case kR8_unorm_SkColorType: return 0; + } + SkUNREACHABLE; +} + +static inline size_t SkColorTypeMinRowBytes(SkColorType ct, int width) { + return (size_t)(width * SkColorTypeBytesPerPixel(ct)); +} + +static inline bool SkColorTypeIsValid(unsigned value) { + return value <= kLastEnum_SkColorType; +} + +static inline size_t SkColorTypeComputeOffset(SkColorType ct, int x, int y, size_t rowBytes) { + if (kUnknown_SkColorType == ct) { + return 0; + } + return (size_t)y * rowBytes + ((size_t)x << SkColorTypeShiftPerPixel(ct)); +} + +static inline bool SkColorTypeIsNormalized(SkColorType ct) { + switch (ct) { + case kUnknown_SkColorType: + case kAlpha_8_SkColorType: + case kRGB_565_SkColorType: + case kARGB_4444_SkColorType: + case kRGBA_8888_SkColorType: + case kRGB_888x_SkColorType: + case kBGRA_8888_SkColorType: + case kRGBA_1010102_SkColorType: + case kRGB_101010x_SkColorType: + case kBGRA_1010102_SkColorType: + case kBGR_101010x_SkColorType: + case kGray_8_SkColorType: + case kRGBA_F16Norm_SkColorType: + case kR8G8_unorm_SkColorType: + case kA16_unorm_SkColorType: + case kA16_float_SkColorType: /*subtle... alpha is always [0,1]*/ + case kR16G16_unorm_SkColorType: + case kR16G16B16A16_unorm_SkColorType: + case kSRGBA_8888_SkColorType: + case kR8_unorm_SkColorType: + return true; + + case kBGR_101010x_XR_SkColorType: + case kRGBA_F16_SkColorType: + case kRGBA_F32_SkColorType: + case kR16G16_float_SkColorType: + return false; + } + SkUNREACHABLE; +} + +static inline int SkColorTypeMaxBitsPerChannel(SkColorType ct) { + switch (ct) { + case kUnknown_SkColorType: + return 0; + + case kARGB_4444_SkColorType: + return 4; + + case kRGB_565_SkColorType: + return 6; + + case kAlpha_8_SkColorType: + case kRGBA_8888_SkColorType: + case kRGB_888x_SkColorType: + case kBGRA_8888_SkColorType: + case kGray_8_SkColorType: + case kR8G8_unorm_SkColorType: + case kSRGBA_8888_SkColorType: + case kR8_unorm_SkColorType: + return 8; + + case kRGBA_1010102_SkColorType: + case kRGB_101010x_SkColorType: + case kBGRA_1010102_SkColorType: + case kBGR_101010x_SkColorType: + case kBGR_101010x_XR_SkColorType: + return 10; + + case kRGBA_F16Norm_SkColorType: + case kA16_unorm_SkColorType: + case kA16_float_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16B16A16_unorm_SkColorType: + case kRGBA_F16_SkColorType: + case kR16G16_float_SkColorType: + return 16; + + case kRGBA_F32_SkColorType: + return 32; + } + SkUNREACHABLE; +} + +/** + * Returns true if |info| contains a valid colorType and alphaType. + */ +static inline bool SkColorInfoIsValid(const SkColorInfo& info) { + return info.colorType() != kUnknown_SkColorType && info.alphaType() != kUnknown_SkAlphaType; +} + +/** + * Returns true if |info| contains a valid combination of width, height and colorInfo. + */ +static inline bool SkImageInfoIsValid(const SkImageInfo& info) { + if (info.width() <= 0 || info.height() <= 0) { + return false; + } + + const int kMaxDimension = SK_MaxS32 >> 2; + if (info.width() > kMaxDimension || info.height() > kMaxDimension) { + return false; + } + + return SkColorInfoIsValid(info.colorInfo()); +} + +/** + * Returns true if Skia has defined a pixel conversion from the |src| to the |dst|. + * Returns false otherwise. + */ +static inline bool SkImageInfoValidConversion(const SkImageInfo& dst, const SkImageInfo& src) { + return SkImageInfoIsValid(dst) && SkImageInfoIsValid(src); +} +#endif // SkImageInfoPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkImagePriv.h b/gfx/skia/skia/src/core/SkImagePriv.h new file mode 100644 index 0000000000..7d343fe2c9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkImagePriv.h @@ -0,0 +1,62 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImagePriv_DEFINED +#define SkImagePriv_DEFINED + +#include "include/core/SkImage.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTileMode.h" + +class SkPixelRef; + +enum SkCopyPixelsMode { + kIfMutable_SkCopyPixelsMode, //!< only copy src pixels if they are marked mutable + kAlways_SkCopyPixelsMode, //!< always copy src pixels (even if they are marked immutable) + kNever_SkCopyPixelsMode, //!< never copy src pixels (even if they are marked mutable) +}; + +// If alloc is non-nullptr, it will be used to allocate the returned SkShader, and MUST outlive +// the SkShader. +sk_sp SkMakeBitmapShader(const SkBitmap& src, SkTileMode, SkTileMode, + const SkSamplingOptions&, const SkMatrix* localMatrix, + SkCopyPixelsMode); + +// Convenience function to return a shader that implements the shader+image behavior defined for +// drawImage/Bitmap where the paint's shader is ignored when the bitmap is a color image, but +// properly compose them together when it is an alpha image. This allows the returned paint to +// be assigned to a paint clone without discarding the original behavior. +sk_sp SkMakeBitmapShaderForPaint(const SkPaint& paint, const SkBitmap& src, + SkTileMode, SkTileMode, const SkSamplingOptions&, + const SkMatrix* localMatrix, SkCopyPixelsMode); + +/** + * Examines the bitmap to decide if it can share the existing pixelRef, or + * if it needs to make a deep-copy of the pixels. + * + * The bitmap's pixelref will be shared if either the bitmap is marked as + * immutable, or CopyPixelsMode allows it. Shared pixel refs are also + * locked when kLocked_SharedPixelRefMode is specified. + * + * Passing kLocked_SharedPixelRefMode allows the image's peekPixels() method + * to succeed, but it will force any lazy decodes/generators to execute if + * they exist on the pixelref. + * + * It is illegal to call this with a texture-backed bitmap. + * + * If the bitmap's colortype cannot be converted into a corresponding + * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return + * nullptr. + */ +extern SK_SPI sk_sp SkMakeImageFromRasterBitmap(const SkBitmap&, SkCopyPixelsMode); + +// Given an image created from SkNewImageFromBitmap, return its pixelref. This +// may be called to see if the surface and the image share the same pixelref, +// in which case the surface may need to perform a copy-on-write. +extern const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* rasterImage); + +#endif diff --git a/gfx/skia/skia/src/core/SkLRUCache.h b/gfx/skia/skia/src/core/SkLRUCache.h new file mode 100644 index 0000000000..83b1e688ac --- /dev/null +++ b/gfx/skia/skia/src/core/SkLRUCache.h @@ -0,0 +1,130 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLRUCache_DEFINED +#define SkLRUCache_DEFINED + +#include "include/private/SkChecksum.h" +#include "src/base/SkTInternalLList.h" +#include "src/core/SkTHash.h" + +/** + * A generic LRU cache. + */ +template +class SkLRUCache { +private: + struct Entry { + Entry(const K& key, V&& value) + : fKey(key) + , fValue(std::move(value)) {} + + K fKey; + V fValue; + + SK_DECLARE_INTERNAL_LLIST_INTERFACE(Entry); + }; + +public: + explicit SkLRUCache(int maxCount) : fMaxCount(maxCount) {} + SkLRUCache() = delete; + + ~SkLRUCache() { + Entry* node = fLRU.head(); + while (node) { + fLRU.remove(node); + delete node; + node = fLRU.head(); + } + } + + // Make noncopyable + SkLRUCache(const SkLRUCache&) = delete; + SkLRUCache& operator=(const SkLRUCache&) = delete; + + V* find(const K& key) { + Entry** value = fMap.find(key); + if (!value) { + return nullptr; + } + Entry* entry = *value; + if (entry != fLRU.head()) { + fLRU.remove(entry); + fLRU.addToHead(entry); + } // else it's already at head position, don't need to do anything + return &entry->fValue; + } + + V* insert(const K& key, V value) { + SkASSERT(!this->find(key)); + + Entry* entry = new Entry(key, std::move(value)); + fMap.set(entry); + fLRU.addToHead(entry); + while (fMap.count() > fMaxCount) { + this->remove(fLRU.tail()->fKey); + } + return &entry->fValue; + } + + V* insert_or_update(const K& key, V value) { + if (V* found = this->find(key)) { + *found = std::move(value); + return found; + } else { + return this->insert(key, std::move(value)); + } + } + + int count() const { + return fMap.count(); + } + + template // f(K*, V*) + void foreach(Fn&& fn) { + typename SkTInternalLList::Iter iter; + for (Entry* e = iter.init(fLRU, SkTInternalLList::Iter::kHead_IterStart); e; + e = iter.next()) { + fn(&e->fKey, &e->fValue); + } + } + + void reset() { + fMap.reset(); + for (Entry* e = fLRU.head(); e; e = fLRU.head()) { + fLRU.remove(e); + delete e; + } + } + +private: + struct Traits { + static const K& GetKey(Entry* e) { + return e->fKey; + } + + static uint32_t Hash(const K& k) { + return HashK()(k); + } + }; + + void remove(const K& key) { + Entry** value = fMap.find(key); + SkASSERT(value); + Entry* entry = *value; + SkASSERT(key == entry->fKey); + fMap.remove(key); + fLRU.remove(entry); + delete entry; + } + + int fMaxCount; + SkTHashTable fMap; + SkTInternalLList fLRU; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkLatticeIter.cpp b/gfx/skia/skia/src/core/SkLatticeIter.cpp new file mode 100644 index 0000000000..d95d67e6b9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkLatticeIter.cpp @@ -0,0 +1,302 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRect.h" +#include "src/core/SkLatticeIter.h" + +/** + * Divs must be in increasing order with no duplicates. + */ +static bool valid_divs(const int* divs, int count, int start, int end) { + int prev = start - 1; + for (int i = 0; i < count; i++) { + if (prev >= divs[i] || divs[i] >= end) { + return false; + } + prev = divs[i]; + } + + return true; +} + +bool SkLatticeIter::Valid(int width, int height, const SkCanvas::Lattice& lattice) { + SkIRect totalBounds = SkIRect::MakeWH(width, height); + SkASSERT(lattice.fBounds); + const SkIRect latticeBounds = *lattice.fBounds; + if (!totalBounds.contains(latticeBounds)) { + return false; + } + + bool zeroXDivs = lattice.fXCount <= 0 || (1 == lattice.fXCount && + latticeBounds.fLeft == lattice.fXDivs[0]); + bool zeroYDivs = lattice.fYCount <= 0 || (1 == lattice.fYCount && + latticeBounds.fTop == lattice.fYDivs[0]); + if (zeroXDivs && zeroYDivs) { + return false; + } + + return valid_divs(lattice.fXDivs, lattice.fXCount, latticeBounds.fLeft, latticeBounds.fRight) + && valid_divs(lattice.fYDivs, lattice.fYCount, latticeBounds.fTop, latticeBounds.fBottom); +} + +/** + * Count the number of pixels that are in "scalable" patches. + */ +static int count_scalable_pixels(const int32_t* divs, int numDivs, bool firstIsScalable, + int start, int end) { + if (0 == numDivs) { + return firstIsScalable ? end - start : 0; + } + + int i; + int count; + if (firstIsScalable) { + count = divs[0] - start; + i = 1; + } else { + count = 0; + i = 0; + } + + for (; i < numDivs; i += 2) { + // Alternatively, we could use |top| and |bottom| as variable names, instead of + // |left| and |right|. + int left = divs[i]; + int right = (i + 1 < numDivs) ? divs[i + 1] : end; + count += right - left; + } + + return count; +} + +/** + * Set points for the src and dst rects on subsequent draw calls. + */ +static void set_points(float* dst, int* src, const int* divs, int divCount, int srcFixed, + int srcScalable, int srcStart, int srcEnd, float dstStart, float dstEnd, + bool isScalable) { + float dstLen = dstEnd - dstStart; + float scale; + if (srcFixed <= dstLen) { + // This is the "normal" case, where we scale the "scalable" patches and leave + // the other patches fixed. + scale = (dstLen - ((float) srcFixed)) / ((float) srcScalable); + } else { + // In this case, we eliminate the "scalable" patches and scale the "fixed" patches. + scale = dstLen / ((float) srcFixed); + } + + src[0] = srcStart; + dst[0] = dstStart; + for (int i = 0; i < divCount; i++) { + src[i + 1] = divs[i]; + int srcDelta = src[i + 1] - src[i]; + float dstDelta; + if (srcFixed <= dstLen) { + dstDelta = isScalable ? scale * srcDelta : srcDelta; + } else { + dstDelta = isScalable ? 0.0f : scale * srcDelta; + } + dst[i + 1] = dst[i] + dstDelta; + + // Alternate between "scalable" and "fixed" patches. + isScalable = !isScalable; + } + + src[divCount + 1] = srcEnd; + dst[divCount + 1] = dstEnd; +} + +SkLatticeIter::SkLatticeIter(const SkCanvas::Lattice& lattice, const SkRect& dst) { + const int* xDivs = lattice.fXDivs; + const int origXCount = lattice.fXCount; + const int* yDivs = lattice.fYDivs; + const int origYCount = lattice.fYCount; + SkASSERT(lattice.fBounds); + const SkIRect src = *lattice.fBounds; + + // In the x-dimension, the first rectangle always starts at x = 0 and is "scalable". + // If xDiv[0] is 0, it indicates that the first rectangle is degenerate, so the + // first real rectangle "scalable" in the x-direction. + // + // The same interpretation applies to the y-dimension. + // + // As we move left to right across the image, alternating patches will be "fixed" or + // "scalable" in the x-direction. Similarly, as move top to bottom, alternating + // patches will be "fixed" or "scalable" in the y-direction. + int xCount = origXCount; + int yCount = origYCount; + bool xIsScalable = (xCount > 0 && src.fLeft == xDivs[0]); + if (xIsScalable) { + // Once we've decided that the first patch is "scalable", we don't need the + // xDiv. It is always implied that we start at the edge of the bounds. + xDivs++; + xCount--; + } + bool yIsScalable = (yCount > 0 && src.fTop == yDivs[0]); + if (yIsScalable) { + // Once we've decided that the first patch is "scalable", we don't need the + // yDiv. It is always implied that we start at the edge of the bounds. + yDivs++; + yCount--; + } + + // Count "scalable" and "fixed" pixels in each dimension. + int xCountScalable = count_scalable_pixels(xDivs, xCount, xIsScalable, src.fLeft, src.fRight); + int xCountFixed = src.width() - xCountScalable; + int yCountScalable = count_scalable_pixels(yDivs, yCount, yIsScalable, src.fTop, src.fBottom); + int yCountFixed = src.height() - yCountScalable; + + fSrcX.reset(xCount + 2); + fDstX.reset(xCount + 2); + set_points(fDstX.begin(), fSrcX.begin(), xDivs, xCount, xCountFixed, xCountScalable, + src.fLeft, src.fRight, dst.fLeft, dst.fRight, xIsScalable); + + fSrcY.reset(yCount + 2); + fDstY.reset(yCount + 2); + set_points(fDstY.begin(), fSrcY.begin(), yDivs, yCount, yCountFixed, yCountScalable, + src.fTop, src.fBottom, dst.fTop, dst.fBottom, yIsScalable); + + fCurrX = fCurrY = 0; + fNumRectsInLattice = (xCount + 1) * (yCount + 1); + fNumRectsToDraw = fNumRectsInLattice; + + if (lattice.fRectTypes) { + fRectTypes.push_back_n(fNumRectsInLattice); + fColors.push_back_n(fNumRectsInLattice); + + const SkCanvas::Lattice::RectType* flags = lattice.fRectTypes; + const SkColor* colors = lattice.fColors; + + bool hasPadRow = (yCount != origYCount); + bool hasPadCol = (xCount != origXCount); + if (hasPadRow) { + // The first row of rects are all empty, skip the first row of flags. + flags += origXCount + 1; + colors += origXCount + 1; + } + + int i = 0; + for (int y = 0; y < yCount + 1; y++) { + for (int x = 0; x < origXCount + 1; x++) { + if (0 == x && hasPadCol) { + // The first column of rects are all empty. Skip a rect. + flags++; + colors++; + continue; + } + + fRectTypes[i] = *flags; + fColors[i] = SkCanvas::Lattice::kFixedColor == *flags ? *colors : 0; + flags++; + colors++; + i++; + } + } + + for (int j = 0; j < fRectTypes.size(); j++) { + if (SkCanvas::Lattice::kTransparent == fRectTypes[j]) { + fNumRectsToDraw--; + } + } + } +} + +bool SkLatticeIter::Valid(int width, int height, const SkIRect& center) { + return !center.isEmpty() && SkIRect::MakeWH(width, height).contains(center); +} + +SkLatticeIter::SkLatticeIter(int w, int h, const SkIRect& c, const SkRect& dst) { + SkASSERT(SkIRect::MakeWH(w, h).contains(c)); + + fSrcX.reset(4); + fSrcY.reset(4); + fDstX.reset(4); + fDstY.reset(4); + + fSrcX[0] = 0; + fSrcX[1] = SkIntToScalar(c.fLeft); + fSrcX[2] = SkIntToScalar(c.fRight); + fSrcX[3] = SkIntToScalar(w); + + fSrcY[0] = 0; + fSrcY[1] = SkIntToScalar(c.fTop); + fSrcY[2] = SkIntToScalar(c.fBottom); + fSrcY[3] = SkIntToScalar(h); + + fDstX[0] = dst.fLeft; + fDstX[1] = dst.fLeft + SkIntToScalar(c.fLeft); + fDstX[2] = dst.fRight - SkIntToScalar(w - c.fRight); + fDstX[3] = dst.fRight; + + fDstY[0] = dst.fTop; + fDstY[1] = dst.fTop + SkIntToScalar(c.fTop); + fDstY[2] = dst.fBottom - SkIntToScalar(h - c.fBottom); + fDstY[3] = dst.fBottom; + + if (fDstX[1] > fDstX[2]) { + fDstX[1] = fDstX[0] + (fDstX[3] - fDstX[0]) * c.fLeft / (w - c.width()); + fDstX[2] = fDstX[1]; + } + + if (fDstY[1] > fDstY[2]) { + fDstY[1] = fDstY[0] + (fDstY[3] - fDstY[0]) * c.fTop / (h - c.height()); + fDstY[2] = fDstY[1]; + } + + fCurrX = fCurrY = 0; + fNumRectsInLattice = 9; + fNumRectsToDraw = 9; +} + +bool SkLatticeIter::next(SkIRect* src, SkRect* dst, bool* isFixedColor, SkColor* fixedColor) { + int currRect = fCurrX + fCurrY * (fSrcX.size() - 1); + if (currRect == fNumRectsInLattice) { + return false; + } + + const int x = fCurrX; + const int y = fCurrY; + SkASSERT(x >= 0 && x < fSrcX.size() - 1); + SkASSERT(y >= 0 && y < fSrcY.size() - 1); + + if (fSrcX.size() - 1 == ++fCurrX) { + fCurrX = 0; + fCurrY += 1; + } + + if (fRectTypes.size() > 0 + && SkToBool(SkCanvas::Lattice::kTransparent == fRectTypes[currRect])) { + return this->next(src, dst, isFixedColor, fixedColor); + } + + src->setLTRB(fSrcX[x], fSrcY[y], fSrcX[x + 1], fSrcY[y + 1]); + dst->setLTRB(fDstX[x], fDstY[y], fDstX[x + 1], fDstY[y + 1]); + if (isFixedColor && fixedColor) { + *isFixedColor = fRectTypes.size() > 0 + && SkToBool(SkCanvas::Lattice::kFixedColor == fRectTypes[currRect]); + if (*isFixedColor) { + *fixedColor = fColors[currRect]; + } + } + return true; +} + +void SkLatticeIter::mapDstScaleTranslate(const SkMatrix& matrix) { + SkASSERT(matrix.isScaleTranslate()); + SkScalar tx = matrix.getTranslateX(); + SkScalar sx = matrix.getScaleX(); + for (int i = 0; i < fDstX.size(); i++) { + fDstX[i] = fDstX[i] * sx + tx; + } + + SkScalar ty = matrix.getTranslateY(); + SkScalar sy = matrix.getScaleY(); + for (int i = 0; i < fDstY.size(); i++) { + fDstY[i] = fDstY[i] * sy + ty; + } +} diff --git a/gfx/skia/skia/src/core/SkLatticeIter.h b/gfx/skia/skia/src/core/SkLatticeIter.h new file mode 100644 index 0000000000..5148e55555 --- /dev/null +++ b/gfx/skia/skia/src/core/SkLatticeIter.h @@ -0,0 +1,77 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLatticeIter_DEFINED +#define SkLatticeIter_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkTArray.h" + +struct SkIRect; +struct SkRect; + +/** + * Disect a lattice request into an sequence of src-rect / dst-rect pairs + */ +class SK_SPI SkLatticeIter { +public: + + static bool Valid(int imageWidth, int imageHeight, const SkCanvas::Lattice& lattice); + + SkLatticeIter(const SkCanvas::Lattice& lattice, const SkRect& dst); + + static bool Valid(int imageWidth, int imageHeight, const SkIRect& center); + + SkLatticeIter(int imageWidth, int imageHeight, const SkIRect& center, const SkRect& dst); + + /** + * While it returns true, use src/dst to draw the image/bitmap. Optional parameters + * isFixedColor and fixedColor specify if the rectangle is filled with a fixed color. + * If (*isFixedColor) is true, then (*fixedColor) contains the rectangle color. + */ + bool next(SkIRect* src, SkRect* dst, bool* isFixedColor = nullptr, + SkColor* fixedColor = nullptr); + + /** Version of above that converts the integer src rect to a scalar rect. */ + bool next(SkRect* src, SkRect* dst, bool* isFixedColor = nullptr, + SkColor* fixedColor = nullptr) { + SkIRect isrcR; + if (this->next(&isrcR, dst, isFixedColor, fixedColor)) { + *src = SkRect::Make(isrcR); + return true; + } + return false; + } + + /** + * Apply a matrix to the dst points. + */ + void mapDstScaleTranslate(const SkMatrix& matrix); + + /** + * Returns the number of rects that will actually be drawn. + */ + int numRectsToDraw() const { + return fNumRectsToDraw; + } + +private: + skia_private::TArray fSrcX; + skia_private::TArray fSrcY; + skia_private::TArray fDstX; + skia_private::TArray fDstY; + skia_private::TArray fRectTypes; + skia_private::TArray fColors; + + int fCurrX; + int fCurrY; + int fNumRectsInLattice; + int fNumRectsToDraw; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkLineClipper.cpp b/gfx/skia/skia/src/core/SkLineClipper.cpp new file mode 100644 index 0000000000..a2e8031096 --- /dev/null +++ b/gfx/skia/skia/src/core/SkLineClipper.cpp @@ -0,0 +1,282 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkLineClipper.h" + +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" + +#include +#include + +template T pin_unsorted(T value, T limit0, T limit1) { + if (limit1 < limit0) { + using std::swap; + swap(limit0, limit1); + } + // now the limits are sorted + SkASSERT(limit0 <= limit1); + + if (value < limit0) { + value = limit0; + } else if (value > limit1) { + value = limit1; + } + return value; +} + +// return X coordinate of intersection with horizontal line at Y +static SkScalar sect_with_horizontal(const SkPoint src[2], SkScalar Y) { + SkScalar dy = src[1].fY - src[0].fY; + if (SkScalarNearlyZero(dy)) { + return SkScalarAve(src[0].fX, src[1].fX); + } else { + // need the extra precision so we don't compute a value that exceeds + // our original limits + double X0 = src[0].fX; + double Y0 = src[0].fY; + double X1 = src[1].fX; + double Y1 = src[1].fY; + double result = X0 + ((double)Y - Y0) * (X1 - X0) / (Y1 - Y0); + + // The computed X value might still exceed [X0..X1] due to quantum flux + // when the doubles were added and subtracted, so we have to pin the + // answer :( + return (float)pin_unsorted(result, X0, X1); + } +} + +// return Y coordinate of intersection with vertical line at X +static SkScalar sect_with_vertical(const SkPoint src[2], SkScalar X) { + SkScalar dx = src[1].fX - src[0].fX; + if (SkScalarNearlyZero(dx)) { + return SkScalarAve(src[0].fY, src[1].fY); + } else { + // need the extra precision so we don't compute a value that exceeds + // our original limits + double X0 = src[0].fX; + double Y0 = src[0].fY; + double X1 = src[1].fX; + double Y1 = src[1].fY; + double result = Y0 + ((double)X - X0) * (Y1 - Y0) / (X1 - X0); + return (float)result; + } +} + +static SkScalar sect_clamp_with_vertical(const SkPoint src[2], SkScalar x) { + SkScalar y = sect_with_vertical(src, x); + // Our caller expects y to be between src[0].fY and src[1].fY (unsorted), but due to the + // numerics of floats/doubles, we might have computed a value slightly outside of that, + // so we have to manually clamp afterwards. + // See skbug.com/7491 + return pin_unsorted(y, src[0].fY, src[1].fY); +} + +/////////////////////////////////////////////////////////////////////////////// + +static inline bool nestedLT(SkScalar a, SkScalar b, SkScalar dim) { + return a <= b && (a < b || dim > 0); +} + +// returns true if outer contains inner, even if inner is empty. +// note: outer.contains(inner) always returns false if inner is empty. +static inline bool containsNoEmptyCheck(const SkRect& outer, + const SkRect& inner) { + return outer.fLeft <= inner.fLeft && outer.fTop <= inner.fTop && + outer.fRight >= inner.fRight && outer.fBottom >= inner.fBottom; +} + +bool SkLineClipper::IntersectLine(const SkPoint src[2], const SkRect& clip, + SkPoint dst[2]) { + SkRect bounds; + + bounds.set(src[0], src[1]); + if (containsNoEmptyCheck(clip, bounds)) { + if (src != dst) { + memcpy(dst, src, 2 * sizeof(SkPoint)); + } + return true; + } + // check for no overlap, and only permit coincident edges if the line + // and the edge are colinear + if (nestedLT(bounds.fRight, clip.fLeft, bounds.width()) || + nestedLT(clip.fRight, bounds.fLeft, bounds.width()) || + nestedLT(bounds.fBottom, clip.fTop, bounds.height()) || + nestedLT(clip.fBottom, bounds.fTop, bounds.height())) { + return false; + } + + int index0, index1; + + if (src[0].fY < src[1].fY) { + index0 = 0; + index1 = 1; + } else { + index0 = 1; + index1 = 0; + } + + SkPoint tmp[2]; + memcpy(tmp, src, sizeof(tmp)); + + // now compute Y intersections + if (tmp[index0].fY < clip.fTop) { + tmp[index0].set(sect_with_horizontal(src, clip.fTop), clip.fTop); + } + if (tmp[index1].fY > clip.fBottom) { + tmp[index1].set(sect_with_horizontal(src, clip.fBottom), clip.fBottom); + } + + if (tmp[0].fX < tmp[1].fX) { + index0 = 0; + index1 = 1; + } else { + index0 = 1; + index1 = 0; + } + + // check for quick-reject in X again, now that we may have been chopped + if ((tmp[index1].fX <= clip.fLeft || tmp[index0].fX >= clip.fRight)) { + // usually we will return false, but we don't if the line is vertical and coincident + // with the clip. + if (tmp[0].fX != tmp[1].fX || tmp[0].fX < clip.fLeft || tmp[0].fX > clip.fRight) { + return false; + } + } + + if (tmp[index0].fX < clip.fLeft) { + tmp[index0].set(clip.fLeft, sect_with_vertical(tmp, clip.fLeft)); + } + if (tmp[index1].fX > clip.fRight) { + tmp[index1].set(clip.fRight, sect_with_vertical(tmp, clip.fRight)); + } +#ifdef SK_DEBUG + bounds.set(tmp[0], tmp[1]); + SkASSERT(containsNoEmptyCheck(clip, bounds)); +#endif + memcpy(dst, tmp, sizeof(tmp)); + return true; +} + +#ifdef SK_DEBUG +// return value between the two limits, where the limits are either ascending +// or descending. +static bool is_between_unsorted(SkScalar value, + SkScalar limit0, SkScalar limit1) { + if (limit0 < limit1) { + return limit0 <= value && value <= limit1; + } else { + return limit1 <= value && value <= limit0; + } +} +#endif + +int SkLineClipper::ClipLine(const SkPoint pts[2], const SkRect& clip, SkPoint lines[kMaxPoints], + bool canCullToTheRight) { + int index0, index1; + + if (pts[0].fY < pts[1].fY) { + index0 = 0; + index1 = 1; + } else { + index0 = 1; + index1 = 0; + } + + // Check if we're completely clipped out in Y (above or below + + if (pts[index1].fY <= clip.fTop) { // we're above the clip + return 0; + } + if (pts[index0].fY >= clip.fBottom) { // we're below the clip + return 0; + } + + // Chop in Y to produce a single segment, stored in tmp[0..1] + + SkPoint tmp[2]; + memcpy(tmp, pts, sizeof(tmp)); + + // now compute intersections + if (pts[index0].fY < clip.fTop) { + tmp[index0].set(sect_with_horizontal(pts, clip.fTop), clip.fTop); + SkASSERT(is_between_unsorted(tmp[index0].fX, pts[0].fX, pts[1].fX)); + } + if (tmp[index1].fY > clip.fBottom) { + tmp[index1].set(sect_with_horizontal(pts, clip.fBottom), clip.fBottom); + SkASSERT(is_between_unsorted(tmp[index1].fX, pts[0].fX, pts[1].fX)); + } + + // Chop it into 1..3 segments that are wholly within the clip in X. + + // temp storage for up to 3 segments + SkPoint resultStorage[kMaxPoints]; + SkPoint* result; // points to our results, either tmp or resultStorage + int lineCount = 1; + bool reverse; + + if (pts[0].fX < pts[1].fX) { + index0 = 0; + index1 = 1; + reverse = false; + } else { + index0 = 1; + index1 = 0; + reverse = true; + } + + if (tmp[index1].fX <= clip.fLeft) { // wholly to the left + tmp[0].fX = tmp[1].fX = clip.fLeft; + result = tmp; + reverse = false; + } else if (tmp[index0].fX >= clip.fRight) { // wholly to the right + if (canCullToTheRight) { + return 0; + } + tmp[0].fX = tmp[1].fX = clip.fRight; + result = tmp; + reverse = false; + } else { + result = resultStorage; + SkPoint* r = result; + + if (tmp[index0].fX < clip.fLeft) { + r->set(clip.fLeft, tmp[index0].fY); + r += 1; + r->set(clip.fLeft, sect_clamp_with_vertical(tmp, clip.fLeft)); + SkASSERT(is_between_unsorted(r->fY, tmp[0].fY, tmp[1].fY)); + } else { + *r = tmp[index0]; + } + r += 1; + + if (tmp[index1].fX > clip.fRight) { + r->set(clip.fRight, sect_clamp_with_vertical(tmp, clip.fRight)); + SkASSERT(is_between_unsorted(r->fY, tmp[0].fY, tmp[1].fY)); + r += 1; + r->set(clip.fRight, tmp[index1].fY); + } else { + *r = tmp[index1]; + } + + lineCount = SkToInt(r - result); + } + + // Now copy the results into the caller's lines[] parameter + if (reverse) { + // copy the pts in reverse order to maintain winding order + for (int i = 0; i <= lineCount; i++) { + lines[lineCount - i] = result[i]; + } + } else { + memcpy(lines, result, (lineCount + 1) * sizeof(SkPoint)); + } + return lineCount; +} diff --git a/gfx/skia/skia/src/core/SkLineClipper.h b/gfx/skia/skia/src/core/SkLineClipper.h new file mode 100644 index 0000000000..65460147c7 --- /dev/null +++ b/gfx/skia/skia/src/core/SkLineClipper.h @@ -0,0 +1,45 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkLineClipper_DEFINED +#define SkLineClipper_DEFINED + +struct SkPoint; +struct SkRect; + +class SkLineClipper { +public: + enum { + kMaxPoints = 4, + kMaxClippedLineSegments = kMaxPoints - 1 + }; + + /* Clip the line pts[0]...pts[1] against clip, ignoring segments that + lie completely above or below the clip. For portions to the left or + right, turn those into vertical line segments that are aligned to the + edge of the clip. + + Return the number of line segments that result, and store the end-points + of those segments sequentially in lines as follows: + 1st segment: lines[0]..lines[1] + 2nd segment: lines[1]..lines[2] + 3rd segment: lines[2]..lines[3] + */ + static int ClipLine(const SkPoint pts[2], const SkRect& clip, + SkPoint lines[kMaxPoints], bool canCullToTheRight); + + /* Intersect the line segment against the rect. If there is a non-empty + resulting segment, return true and set dst[] to that segment. If not, + return false and ignore dst[]. + + ClipLine is specialized for scan-conversion, as it adds vertical + segments on the sides to show where the line extended beyond the + left or right sides. IntersectLine does not. + */ + static bool IntersectLine(const SkPoint src[2], const SkRect& clip, SkPoint dst[2]); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkLocalMatrixImageFilter.cpp b/gfx/skia/skia/src/core/SkLocalMatrixImageFilter.cpp new file mode 100644 index 0000000000..34be583a98 --- /dev/null +++ b/gfx/skia/skia/src/core/SkLocalMatrixImageFilter.cpp @@ -0,0 +1,73 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkLocalMatrixImageFilter.h" + +#include "include/core/SkString.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkWriteBuffer.h" + +sk_sp SkLocalMatrixImageFilter::Make(const SkMatrix& localM, + sk_sp input) { + if (!input) { + return nullptr; + } + if (localM.isIdentity()) { + return input; + } + MatrixCapability inputCapability = as_IFB(input)->getCTMCapability(); + if ((inputCapability == MatrixCapability::kTranslate && !localM.isTranslate()) || + (inputCapability == MatrixCapability::kScaleTranslate && !localM.isScaleTranslate())) { + // Nothing we can do at this point + return nullptr; + } + return sk_sp(new SkLocalMatrixImageFilter(localM, input)); +} + +SkLocalMatrixImageFilter::SkLocalMatrixImageFilter(const SkMatrix& localM, + sk_sp input) + : INHERITED(&input, 1, nullptr) + , fLocalM(localM) { +} + +sk_sp SkLocalMatrixImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkMatrix lm; + buffer.readMatrix(&lm); + return SkLocalMatrixImageFilter::Make(lm, common.getInput(0)); +} + +void SkLocalMatrixImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeMatrix(fLocalM); +} + +sk_sp SkLocalMatrixImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + skif::Mapping newMapping = ctx.mapping(); + newMapping.concatLocal(fLocalM); + Context localCtx = ctx.withNewMapping(newMapping); + return this->filterInput(0, localCtx, offset); +} + +SkIRect SkLocalMatrixImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection dir, const SkIRect* inputRect) const { + return this->getInput(0)->filterBounds(src, SkMatrix::Concat(ctm, fLocalM), dir, inputRect); +} + +SkRect SkLocalMatrixImageFilter::computeFastBounds(const SkRect& bounds) const { + // In order to match the behavior of onFilterBounds, we map 'bounds' by the inverse of our + // local matrix, pass that to our child, and then map the result by our local matrix. + SkMatrix localInv; + if (!fLocalM.invert(&localInv)) { + return this->getInput(0)->computeFastBounds(bounds); + } + + SkRect localBounds = localInv.mapRect(bounds); + return fLocalM.mapRect(this->getInput(0)->computeFastBounds(localBounds)); +} diff --git a/gfx/skia/skia/src/core/SkLocalMatrixImageFilter.h b/gfx/skia/skia/src/core/SkLocalMatrixImageFilter.h new file mode 100644 index 0000000000..d12666a6f4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkLocalMatrixImageFilter.h @@ -0,0 +1,42 @@ +/* + * Copyright 2015 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLocalMatrixImageFilter_DEFINED +#define SkLocalMatrixImageFilter_DEFINED + +#include "include/core/SkFlattenable.h" +#include "src/core/SkImageFilter_Base.h" + +/** + * Wraps another imagefilter + matrix, such that using this filter will give the same result + * as using the wrapped filter with the matrix applied to its context. + */ +class SkLocalMatrixImageFilter : public SkImageFilter_Base { +public: + static sk_sp Make(const SkMatrix& localM, sk_sp input); + + SkRect computeFastBounds(const SkRect&) const override; + +protected: + void flatten(SkWriteBuffer&) const override; + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + SkIRect onFilterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + + MatrixCapability onGetCTMCapability() const override { return MatrixCapability::kComplex; } + +private: + SK_FLATTENABLE_HOOKS(SkLocalMatrixImageFilter) + + SkLocalMatrixImageFilter(const SkMatrix& localM, sk_sp input); + + SkMatrix fLocalM; + + using INHERITED = SkImageFilter_Base; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkM44.cpp b/gfx/skia/skia/src/core/SkM44.cpp new file mode 100644 index 0000000000..747372cfd8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkM44.cpp @@ -0,0 +1,356 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" +#include "src/base/SkVx.h" + +#include "src/core/SkMatrixInvert.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkPathPriv.h" + +bool SkM44::operator==(const SkM44& other) const { + if (this == &other) { + return true; + } + + auto a0 = skvx::float4::Load(fMat + 0); + auto a1 = skvx::float4::Load(fMat + 4); + auto a2 = skvx::float4::Load(fMat + 8); + auto a3 = skvx::float4::Load(fMat + 12); + + auto b0 = skvx::float4::Load(other.fMat + 0); + auto b1 = skvx::float4::Load(other.fMat + 4); + auto b2 = skvx::float4::Load(other.fMat + 8); + auto b3 = skvx::float4::Load(other.fMat + 12); + + auto eq = (a0 == b0) & (a1 == b1) & (a2 == b2) & (a3 == b3); + return (eq[0] & eq[1] & eq[2] & eq[3]) == ~0; +} + +static void transpose_arrays(SkScalar dst[], const SkScalar src[]) { + dst[0] = src[0]; dst[1] = src[4]; dst[2] = src[8]; dst[3] = src[12]; + dst[4] = src[1]; dst[5] = src[5]; dst[6] = src[9]; dst[7] = src[13]; + dst[8] = src[2]; dst[9] = src[6]; dst[10] = src[10]; dst[11] = src[14]; + dst[12] = src[3]; dst[13] = src[7]; dst[14] = src[11]; dst[15] = src[15]; +} + +void SkM44::getRowMajor(SkScalar v[]) const { + transpose_arrays(v, fMat); +} + +SkM44& SkM44::setConcat(const SkM44& a, const SkM44& b) { + auto c0 = skvx::float4::Load(a.fMat + 0); + auto c1 = skvx::float4::Load(a.fMat + 4); + auto c2 = skvx::float4::Load(a.fMat + 8); + auto c3 = skvx::float4::Load(a.fMat + 12); + + auto compute = [&](skvx::float4 r) { + return c0*r[0] + (c1*r[1] + (c2*r[2] + c3*r[3])); + }; + + auto m0 = compute(skvx::float4::Load(b.fMat + 0)); + auto m1 = compute(skvx::float4::Load(b.fMat + 4)); + auto m2 = compute(skvx::float4::Load(b.fMat + 8)); + auto m3 = compute(skvx::float4::Load(b.fMat + 12)); + + m0.store(fMat + 0); + m1.store(fMat + 4); + m2.store(fMat + 8); + m3.store(fMat + 12); + return *this; +} + +SkM44& SkM44::preConcat(const SkMatrix& b) { + auto c0 = skvx::float4::Load(fMat + 0); + auto c1 = skvx::float4::Load(fMat + 4); + auto c3 = skvx::float4::Load(fMat + 12); + + auto compute = [&](float r0, float r1, float r3) { + return (c0*r0 + (c1*r1 + c3*r3)); + }; + + auto m0 = compute(b[0], b[3], b[6]); + auto m1 = compute(b[1], b[4], b[7]); + auto m3 = compute(b[2], b[5], b[8]); + + m0.store(fMat + 0); + m1.store(fMat + 4); + m3.store(fMat + 12); + return *this; +} + +SkM44& SkM44::preTranslate(SkScalar x, SkScalar y, SkScalar z) { + auto c0 = skvx::float4::Load(fMat + 0); + auto c1 = skvx::float4::Load(fMat + 4); + auto c2 = skvx::float4::Load(fMat + 8); + auto c3 = skvx::float4::Load(fMat + 12); + + // only need to update the last column + (c0*x + (c1*y + (c2*z + c3))).store(fMat + 12); + return *this; +} + +SkM44& SkM44::postTranslate(SkScalar x, SkScalar y, SkScalar z) { + skvx::float4 t = { x, y, z, 0 }; + (t * fMat[ 3] + skvx::float4::Load(fMat + 0)).store(fMat + 0); + (t * fMat[ 7] + skvx::float4::Load(fMat + 4)).store(fMat + 4); + (t * fMat[11] + skvx::float4::Load(fMat + 8)).store(fMat + 8); + (t * fMat[15] + skvx::float4::Load(fMat + 12)).store(fMat + 12); + return *this; +} + +SkM44& SkM44::preScale(SkScalar x, SkScalar y) { + auto c0 = skvx::float4::Load(fMat + 0); + auto c1 = skvx::float4::Load(fMat + 4); + + (c0 * x).store(fMat + 0); + (c1 * y).store(fMat + 4); + return *this; +} + +SkM44& SkM44::preScale(SkScalar x, SkScalar y, SkScalar z) { + auto c0 = skvx::float4::Load(fMat + 0); + auto c1 = skvx::float4::Load(fMat + 4); + auto c2 = skvx::float4::Load(fMat + 8); + + (c0 * x).store(fMat + 0); + (c1 * y).store(fMat + 4); + (c2 * z).store(fMat + 8); + return *this; +} + +SkV4 SkM44::map(float x, float y, float z, float w) const { + auto c0 = skvx::float4::Load(fMat + 0); + auto c1 = skvx::float4::Load(fMat + 4); + auto c2 = skvx::float4::Load(fMat + 8); + auto c3 = skvx::float4::Load(fMat + 12); + + SkV4 v; + (c0*x + (c1*y + (c2*z + c3*w))).store(&v.x); + return v; +} + +static SkRect map_rect_affine(const SkRect& src, const float mat[16]) { + // When multiplied against vectors of the form , 'flip' allows a single min() + // to compute both the min and "negated" max between the xy coordinates. Once finished, another + // multiplication produces the original max. + const skvx::float4 flip{1.f, 1.f, -1.f, -1.f}; + + // Since z = 0 and it's assumed ther's no perspective, only load the upper 2x2 and (tx,ty) in c3 + auto c0 = skvx::shuffle<0,1,0,1>(skvx::float2::Load(mat + 0)) * flip; + auto c1 = skvx::shuffle<0,1,0,1>(skvx::float2::Load(mat + 4)) * flip; + auto c3 = skvx::shuffle<0,1,0,1>(skvx::float2::Load(mat + 12)); + + // Compute the min and max of the four transformed corners pre-translation; then translate once + // at the end. + auto minMax = c3 + flip * min(min(c0 * src.fLeft + c1 * src.fTop, + c0 * src.fRight + c1 * src.fTop), + min(c0 * src.fLeft + c1 * src.fBottom, + c0 * src.fRight + c1 * src.fBottom)); + + // minMax holds (min x, min y, max x, max y) so can be copied into an SkRect expecting l,t,r,b + SkRect r; + minMax.store(&r); + return r; +} + +static SkRect map_rect_perspective(const SkRect& src, const float mat[16]) { + // Like map_rect_affine, z = 0 so we can skip the 3rd column, but we do need to compute w's + // for each corner of the src rect. + auto c0 = skvx::float4::Load(mat + 0); + auto c1 = skvx::float4::Load(mat + 4); + auto c3 = skvx::float4::Load(mat + 12); + + // Unlike map_rect_affine, we do not defer the 4th column since we may need to homogeneous + // coordinates to clip against the w=0 plane + auto tl = c0 * src.fLeft + c1 * src.fTop + c3; + auto tr = c0 * src.fRight + c1 * src.fTop + c3; + auto bl = c0 * src.fLeft + c1 * src.fBottom + c3; + auto br = c0 * src.fRight + c1 * src.fBottom + c3; + + // After clipping to w>0 and projecting to 2d, 'project' employs the same negation trick to + // compute min and max at the same time. + const skvx::float4 flip{1.f, 1.f, -1.f, -1.f}; + auto project = [&flip](const skvx::float4& p0, const skvx::float4& p1, const skvx::float4& p2) { + float w0 = p0[3]; + if (w0 >= SkPathPriv::kW0PlaneDistance) { + // Unclipped, just divide by w + return flip * skvx::shuffle<0,1,0,1>(p0) / w0; + } else { + auto clip = [&](const skvx::float4& p) { + float w = p[3]; + if (w >= SkPathPriv::kW0PlaneDistance) { + float t = (SkPathPriv::kW0PlaneDistance - w0) / (w - w0); + auto c = (t * skvx::shuffle<0,1>(p) + (1.f - t) * skvx::shuffle<0,1>(p0)) / + SkPathPriv::kW0PlaneDistance; + + return flip * skvx::shuffle<0,1,0,1>(c); + } else { + return skvx::float4(SK_ScalarInfinity); + } + }; + // Clip both edges leaving p0, and return the min/max of the two clipped points + // (since clip returns infinity when both p0 and 2nd vertex have w<0, it'll + // automatically be ignored). + return min(clip(p1), clip(p2)); + } + }; + + // Project all 4 corners, and pass in their adjacent vertices for clipping if it has w < 0, + // then accumulate the min and max xy's. + auto minMax = flip * min(min(project(tl, tr, bl), project(tr, br, tl)), + min(project(br, bl, tr), project(bl, tl, br))); + + SkRect r; + minMax.store(&r); + return r; +} + +SkRect SkMatrixPriv::MapRect(const SkM44& m, const SkRect& src) { + const bool hasPerspective = + m.fMat[3] != 0 || m.fMat[7] != 0 || m.fMat[11] != 0 || m.fMat[15] != 1; + if (hasPerspective) { + return map_rect_perspective(src, m.fMat); + } else { + return map_rect_affine(src, m.fMat); + } +} + +void SkM44::normalizePerspective() { + // If the bottom row of the matrix is [0, 0, 0, not_one], we will treat the matrix as if it + // is in perspective, even though it stills behaves like its affine. If we divide everything + // by the not_one value, then it will behave the same, but will be treated as affine, + // and therefore faster (e.g. clients can forward-difference calculations). + if (fMat[15] != 1 && fMat[15] != 0 && fMat[3] == 0 && fMat[7] == 0 && fMat[11] == 0) { + double inv = 1.0 / fMat[15]; + (skvx::float4::Load(fMat + 0) * inv).store(fMat + 0); + (skvx::float4::Load(fMat + 4) * inv).store(fMat + 4); + (skvx::float4::Load(fMat + 8) * inv).store(fMat + 8); + (skvx::float4::Load(fMat + 12) * inv).store(fMat + 12); + fMat[15] = 1.0f; + } +} + +/////////////////////////////////////////////////////////////////////////////// + +/** We always perform the calculation in doubles, to avoid prematurely losing + precision along the way. This relies on the compiler automatically + promoting our SkScalar values to double (if needed). + */ +bool SkM44::invert(SkM44* inverse) const { + SkScalar tmp[16]; + if (SkInvert4x4Matrix(fMat, tmp) == 0.0f) { + return false; + } + memcpy(inverse->fMat, tmp, sizeof(tmp)); + return true; +} + +SkM44 SkM44::transpose() const { + SkM44 trans(SkM44::kUninitialized_Constructor); + transpose_arrays(trans.fMat, fMat); + return trans; +} + +SkM44& SkM44::setRotateUnitSinCos(SkV3 axis, SkScalar sinAngle, SkScalar cosAngle) { + // Taken from "Essential Mathematics for Games and Interactive Applications" + // James M. Van Verth and Lars M. Bishop -- third edition + SkScalar x = axis.x; + SkScalar y = axis.y; + SkScalar z = axis.z; + SkScalar c = cosAngle; + SkScalar s = sinAngle; + SkScalar t = 1 - c; + + *this = { t*x*x + c, t*x*y - s*z, t*x*z + s*y, 0, + t*x*y + s*z, t*y*y + c, t*y*z - s*x, 0, + t*x*z - s*y, t*y*z + s*x, t*z*z + c, 0, + 0, 0, 0, 1 }; + return *this; +} + +SkM44& SkM44::setRotate(SkV3 axis, SkScalar radians) { + SkScalar len = axis.length(); + if (len > 0 && SkScalarIsFinite(len)) { + this->setRotateUnit(axis * (SK_Scalar1 / len), radians); + } else { + this->setIdentity(); + } + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkM44::dump() const { + SkDebugf("|%g %g %g %g|\n" + "|%g %g %g %g|\n" + "|%g %g %g %g|\n" + "|%g %g %g %g|\n", + fMat[0], fMat[4], fMat[8], fMat[12], + fMat[1], fMat[5], fMat[9], fMat[13], + fMat[2], fMat[6], fMat[10], fMat[14], + fMat[3], fMat[7], fMat[11], fMat[15]); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkM44 SkM44::RectToRect(const SkRect& src, const SkRect& dst) { + if (src.isEmpty()) { + return SkM44(); + } else if (dst.isEmpty()) { + return SkM44::Scale(0.f, 0.f, 0.f); + } + + float sx = dst.width() / src.width(); + float sy = dst.height() / src.height(); + + float tx = dst.fLeft - sx * src.fLeft; + float ty = dst.fTop - sy * src.fTop; + + return SkM44{sx, 0.f, 0.f, tx, + 0.f, sy, 0.f, ty, + 0.f, 0.f, 1.f, 0.f, + 0.f, 0.f, 0.f, 1.f}; +} + +static SkV3 normalize(SkV3 v) { + const auto vlen = v.length(); + + return SkScalarNearlyZero(vlen) ? v : v * (1.0f / vlen); +} + +static SkV4 v4(SkV3 v, SkScalar w) { return {v.x, v.y, v.z, w}; } + +SkM44 SkM44::LookAt(const SkV3& eye, const SkV3& center, const SkV3& up) { + SkV3 f = normalize(center - eye); + SkV3 u = normalize(up); + SkV3 s = normalize(f.cross(u)); + + SkM44 m(SkM44::kUninitialized_Constructor); + if (!SkM44::Cols(v4(s, 0), v4(s.cross(f), 0), v4(-f, 0), v4(eye, 1)).invert(&m)) { + m.setIdentity(); + } + return m; +} + +SkM44 SkM44::Perspective(float near, float far, float angle) { + SkASSERT(far > near); + + float denomInv = sk_ieee_float_divide(1, far - near); + float halfAngle = angle * 0.5f; + SkASSERT(halfAngle != 0); + float cot = sk_ieee_float_divide(1, sk_float_tan(halfAngle)); + + SkM44 m; + m.setRC(0, 0, cot); + m.setRC(1, 1, cot); + m.setRC(2, 2, (far + near) * denomInv); + m.setRC(2, 3, 2 * far * near * denomInv); + m.setRC(3, 2, -1); + return m; +} diff --git a/gfx/skia/skia/src/core/SkMD5.cpp b/gfx/skia/skia/src/core/SkMD5.cpp new file mode 100644 index 0000000000..43dc0db261 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMD5.cpp @@ -0,0 +1,261 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * The following code is based on the description in RFC 1321. + * http://www.ietf.org/rfc/rfc1321.txt + */ + +//The following macros can be defined to affect the MD5 code generated. +//SK_MD5_CLEAR_DATA causes all intermediate state to be overwritten with 0's. +//SK_CPU_LENDIAN allows 32 bit <=> 8 bit conversions without copies (if alligned). +//SK_CPU_FAST_UNALIGNED_ACCESS allows 32 bit <=> 8 bit conversions without copies if SK_CPU_LENDIAN. + +#include "src/core/SkMD5.h" + +#include "include/private/base/SkFeatures.h" + +/** MD5 basic transformation. Transforms state based on block. */ +static void transform(uint32_t state[4], const uint8_t block[64]); + +/** Encodes input into output (4 little endian 32 bit values). */ +static void encode(uint8_t output[16], const uint32_t input[4]); + +/** Encodes input into output (little endian 64 bit value). */ +static void encode(uint8_t output[8], const uint64_t input); + +/** Decodes input (4 little endian 32 bit values) into storage, if required. */ +static const uint32_t* decode(uint32_t storage[16], const uint8_t input[64]); + +SkMD5::SkMD5() : byteCount(0) { + // These are magic numbers from the specification. + this->state[0] = 0x67452301; + this->state[1] = 0xefcdab89; + this->state[2] = 0x98badcfe; + this->state[3] = 0x10325476; +} + +bool SkMD5::write(const void* buf, size_t inputLength) { + const uint8_t* input = reinterpret_cast(buf); + unsigned int bufferIndex = (unsigned int)(this->byteCount & 0x3F); + unsigned int bufferAvailable = 64 - bufferIndex; + + unsigned int inputIndex; + if (inputLength >= bufferAvailable) { + if (bufferIndex) { + memcpy(&this->buffer[bufferIndex], input, bufferAvailable); + transform(this->state, this->buffer); + inputIndex = bufferAvailable; + } else { + inputIndex = 0; + } + + for (; inputIndex + 63 < inputLength; inputIndex += 64) { + transform(this->state, &input[inputIndex]); + } + + bufferIndex = 0; + } else { + inputIndex = 0; + } + + memcpy(&this->buffer[bufferIndex], &input[inputIndex], inputLength - inputIndex); + + this->byteCount += inputLength; + return true; +} + +SkMD5::Digest SkMD5::finish() { + SkMD5::Digest digest; + // Get the number of bits before padding. + uint8_t bits[8]; + encode(bits, this->byteCount << 3); + + // Pad out to 56 mod 64. + unsigned int bufferIndex = (unsigned int)(this->byteCount & 0x3F); + unsigned int paddingLength = (bufferIndex < 56) ? (56 - bufferIndex) : (120 - bufferIndex); + static const uint8_t PADDING[64] = { + 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + }; + (void)this->write(PADDING, paddingLength); + + // Append length (length before padding, will cause final update). + (void)this->write(bits, 8); + + // Write out digest. + encode(digest.data, this->state); + +#if defined(SK_MD5_CLEAR_DATA) + // Clear state. + memset(this, 0, sizeof(*this)); +#endif + return digest; +} + +struct F { uint32_t operator()(uint32_t x, uint32_t y, uint32_t z) { + //return (x & y) | ((~x) & z); + return ((y ^ z) & x) ^ z; //equivelent but faster +}}; + +struct G { uint32_t operator()(uint32_t x, uint32_t y, uint32_t z) { + return (x & z) | (y & (~z)); + //return ((x ^ y) & z) ^ y; //equivelent but slower +}}; + +struct H { uint32_t operator()(uint32_t x, uint32_t y, uint32_t z) { + return x ^ y ^ z; +}}; + +struct I { uint32_t operator()(uint32_t x, uint32_t y, uint32_t z) { + return y ^ (x | (~z)); +}}; + +/** Rotates x left n bits. */ +static inline uint32_t rotate_left(uint32_t x, uint8_t n) { + return (x << n) | (x >> (32 - n)); +} + +template +static inline void operation(T operation, uint32_t& a, uint32_t b, uint32_t c, uint32_t d, + uint32_t x, uint8_t s, uint32_t t) { + a = b + rotate_left(a + operation(b, c, d) + x + t, s); +} + +static void transform(uint32_t state[4], const uint8_t block[64]) { + uint32_t a = state[0], b = state[1], c = state[2], d = state[3]; + + uint32_t storage[16]; + const uint32_t* X = decode(storage, block); + + // Round 1 + operation(F(), a, b, c, d, X[ 0], 7, 0xd76aa478); // 1 + operation(F(), d, a, b, c, X[ 1], 12, 0xe8c7b756); // 2 + operation(F(), c, d, a, b, X[ 2], 17, 0x242070db); // 3 + operation(F(), b, c, d, a, X[ 3], 22, 0xc1bdceee); // 4 + operation(F(), a, b, c, d, X[ 4], 7, 0xf57c0faf); // 5 + operation(F(), d, a, b, c, X[ 5], 12, 0x4787c62a); // 6 + operation(F(), c, d, a, b, X[ 6], 17, 0xa8304613); // 7 + operation(F(), b, c, d, a, X[ 7], 22, 0xfd469501); // 8 + operation(F(), a, b, c, d, X[ 8], 7, 0x698098d8); // 9 + operation(F(), d, a, b, c, X[ 9], 12, 0x8b44f7af); // 10 + operation(F(), c, d, a, b, X[10], 17, 0xffff5bb1); // 11 + operation(F(), b, c, d, a, X[11], 22, 0x895cd7be); // 12 + operation(F(), a, b, c, d, X[12], 7, 0x6b901122); // 13 + operation(F(), d, a, b, c, X[13], 12, 0xfd987193); // 14 + operation(F(), c, d, a, b, X[14], 17, 0xa679438e); // 15 + operation(F(), b, c, d, a, X[15], 22, 0x49b40821); // 16 + + // Round 2 + operation(G(), a, b, c, d, X[ 1], 5, 0xf61e2562); // 17 + operation(G(), d, a, b, c, X[ 6], 9, 0xc040b340); // 18 + operation(G(), c, d, a, b, X[11], 14, 0x265e5a51); // 19 + operation(G(), b, c, d, a, X[ 0], 20, 0xe9b6c7aa); // 20 + operation(G(), a, b, c, d, X[ 5], 5, 0xd62f105d); // 21 + operation(G(), d, a, b, c, X[10], 9, 0x2441453); // 22 + operation(G(), c, d, a, b, X[15], 14, 0xd8a1e681); // 23 + operation(G(), b, c, d, a, X[ 4], 20, 0xe7d3fbc8); // 24 + operation(G(), a, b, c, d, X[ 9], 5, 0x21e1cde6); // 25 + operation(G(), d, a, b, c, X[14], 9, 0xc33707d6); // 26 + operation(G(), c, d, a, b, X[ 3], 14, 0xf4d50d87); // 27 + operation(G(), b, c, d, a, X[ 8], 20, 0x455a14ed); // 28 + operation(G(), a, b, c, d, X[13], 5, 0xa9e3e905); // 29 + operation(G(), d, a, b, c, X[ 2], 9, 0xfcefa3f8); // 30 + operation(G(), c, d, a, b, X[ 7], 14, 0x676f02d9); // 31 + operation(G(), b, c, d, a, X[12], 20, 0x8d2a4c8a); // 32 + + // Round 3 + operation(H(), a, b, c, d, X[ 5], 4, 0xfffa3942); // 33 + operation(H(), d, a, b, c, X[ 8], 11, 0x8771f681); // 34 + operation(H(), c, d, a, b, X[11], 16, 0x6d9d6122); // 35 + operation(H(), b, c, d, a, X[14], 23, 0xfde5380c); // 36 + operation(H(), a, b, c, d, X[ 1], 4, 0xa4beea44); // 37 + operation(H(), d, a, b, c, X[ 4], 11, 0x4bdecfa9); // 38 + operation(H(), c, d, a, b, X[ 7], 16, 0xf6bb4b60); // 39 + operation(H(), b, c, d, a, X[10], 23, 0xbebfbc70); // 40 + operation(H(), a, b, c, d, X[13], 4, 0x289b7ec6); // 41 + operation(H(), d, a, b, c, X[ 0], 11, 0xeaa127fa); // 42 + operation(H(), c, d, a, b, X[ 3], 16, 0xd4ef3085); // 43 + operation(H(), b, c, d, a, X[ 6], 23, 0x4881d05); // 44 + operation(H(), a, b, c, d, X[ 9], 4, 0xd9d4d039); // 45 + operation(H(), d, a, b, c, X[12], 11, 0xe6db99e5); // 46 + operation(H(), c, d, a, b, X[15], 16, 0x1fa27cf8); // 47 + operation(H(), b, c, d, a, X[ 2], 23, 0xc4ac5665); // 48 + + // Round 4 + operation(I(), a, b, c, d, X[ 0], 6, 0xf4292244); // 49 + operation(I(), d, a, b, c, X[ 7], 10, 0x432aff97); // 50 + operation(I(), c, d, a, b, X[14], 15, 0xab9423a7); // 51 + operation(I(), b, c, d, a, X[ 5], 21, 0xfc93a039); // 52 + operation(I(), a, b, c, d, X[12], 6, 0x655b59c3); // 53 + operation(I(), d, a, b, c, X[ 3], 10, 0x8f0ccc92); // 54 + operation(I(), c, d, a, b, X[10], 15, 0xffeff47d); // 55 + operation(I(), b, c, d, a, X[ 1], 21, 0x85845dd1); // 56 + operation(I(), a, b, c, d, X[ 8], 6, 0x6fa87e4f); // 57 + operation(I(), d, a, b, c, X[15], 10, 0xfe2ce6e0); // 58 + operation(I(), c, d, a, b, X[ 6], 15, 0xa3014314); // 59 + operation(I(), b, c, d, a, X[13], 21, 0x4e0811a1); // 60 + operation(I(), a, b, c, d, X[ 4], 6, 0xf7537e82); // 61 + operation(I(), d, a, b, c, X[11], 10, 0xbd3af235); // 62 + operation(I(), c, d, a, b, X[ 2], 15, 0x2ad7d2bb); // 63 + operation(I(), b, c, d, a, X[ 9], 21, 0xeb86d391); // 64 + + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + +#if defined(SK_MD5_CLEAR_DATA) + // Clear sensitive information. + if (X == &storage) { + memset(storage, 0, sizeof(storage)); + } +#endif +} + +static void encode(uint8_t output[16], const uint32_t input[4]) { + for (size_t i = 0, j = 0; i < 4; i++, j += 4) { + output[j ] = (uint8_t) (input[i] & 0xff); + output[j+1] = (uint8_t)((input[i] >> 8) & 0xff); + output[j+2] = (uint8_t)((input[i] >> 16) & 0xff); + output[j+3] = (uint8_t)((input[i] >> 24) & 0xff); + } +} + +static void encode(uint8_t output[8], const uint64_t input) { + output[0] = (uint8_t) (input & 0xff); + output[1] = (uint8_t)((input >> 8) & 0xff); + output[2] = (uint8_t)((input >> 16) & 0xff); + output[3] = (uint8_t)((input >> 24) & 0xff); + output[4] = (uint8_t)((input >> 32) & 0xff); + output[5] = (uint8_t)((input >> 40) & 0xff); + output[6] = (uint8_t)((input >> 48) & 0xff); + output[7] = (uint8_t)((input >> 56) & 0xff); +} + +static inline bool is_aligned(const void *pointer, size_t byte_count) { + return reinterpret_cast(pointer) % byte_count == 0; +} + +static const uint32_t* decode(uint32_t storage[16], const uint8_t input[64]) { +#if defined(SK_CPU_LENDIAN) && defined(SK_CPU_FAST_UNALIGNED_ACCESS) + return reinterpret_cast(input); +#else +#if defined(SK_CPU_LENDIAN) + if (is_aligned(input, 4)) { + return reinterpret_cast(input); + } +#endif + for (size_t i = 0, j = 0; j < 64; i++, j += 4) { + storage[i] = ((uint32_t)input[j ]) | + (((uint32_t)input[j+1]) << 8) | + (((uint32_t)input[j+2]) << 16) | + (((uint32_t)input[j+3]) << 24); + } + return storage; +#endif +} diff --git a/gfx/skia/skia/src/core/SkMD5.h b/gfx/skia/skia/src/core/SkMD5.h new file mode 100644 index 0000000000..10cacf188b --- /dev/null +++ b/gfx/skia/skia/src/core/SkMD5.h @@ -0,0 +1,45 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMD5_DEFINED +#define SkMD5_DEFINED + +#include "include/core/SkStream.h" +#include "include/private/base/SkTo.h" + +#include +#include + +/* Calculate a 128-bit MD5 message-digest of the bytes sent to this stream. */ +class SkMD5 : public SkWStream { +public: + SkMD5(); + + /** Processes input, adding it to the digest. + Calling this after finish is undefined. */ + bool write(const void* buffer, size_t size) final; + + size_t bytesWritten() const final { return SkToSizeT(this->byteCount); } + + struct Digest { + uint8_t data[16]; + bool operator ==(Digest const& other) const { + return 0 == memcmp(data, other.data, sizeof(data)); + } + bool operator !=(Digest const& other) const { return !(*this == other); } + }; + + /** Computes and returns the digest. */ + Digest finish(); + +private: + uint64_t byteCount; // number of bytes, modulo 2^64 + uint32_t state[4]; // state (ABCD) + uint8_t buffer[64]; // input buffer +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkMallocPixelRef.cpp b/gfx/skia/skia/src/core/SkMallocPixelRef.cpp new file mode 100644 index 0000000000..6ee86aba35 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMallocPixelRef.cpp @@ -0,0 +1,77 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkMallocPixelRef.h" + +#include "include/core/SkData.h" +#include "include/core/SkImageInfo.h" +#include "include/private/base/SkMalloc.h" + +static bool is_valid(const SkImageInfo& info) { + if (info.width() < 0 || info.height() < 0 || + (unsigned)info.colorType() > (unsigned)kLastEnum_SkColorType || + (unsigned)info.alphaType() > (unsigned)kLastEnum_SkAlphaType) + { + return false; + } + return true; +} + +sk_sp SkMallocPixelRef::MakeAllocate(const SkImageInfo& info, size_t rowBytes) { + if (rowBytes == 0) { + rowBytes = info.minRowBytes(); + // rowBytes can still be zero, if it overflowed (width * bytesPerPixel > size_t) + // or if colortype is unknown + } + if (!is_valid(info) || !info.validRowBytes(rowBytes)) { + return nullptr; + } + size_t size = info.computeByteSize(rowBytes); + if (SkImageInfo::ByteSizeOverflowed(size)) { + return nullptr; + } +#if defined(SK_BUILD_FOR_FUZZER) + if (size > 10000000) { + return nullptr; + } +#endif + void* addr = sk_calloc_canfail(size); + if (nullptr == addr) { + return nullptr; + } + + struct PixelRef final : public SkPixelRef { + PixelRef(int w, int h, void* s, size_t r) : SkPixelRef(w, h, s, r) {} + ~PixelRef() override { sk_free(this->pixels()); } + }; + return sk_sp(new PixelRef(info.width(), info.height(), addr, rowBytes)); +} + +sk_sp SkMallocPixelRef::MakeWithData(const SkImageInfo& info, + size_t rowBytes, + sk_sp data) { + SkASSERT(data != nullptr); + if (!is_valid(info)) { + return nullptr; + } + // TODO: what should we return if computeByteSize returns 0? + // - the info was empty? + // - we overflowed computing the size? + if ((rowBytes < info.minRowBytes()) || (data->size() < info.computeByteSize(rowBytes))) { + return nullptr; + } + struct PixelRef final : public SkPixelRef { + sk_sp fData; + PixelRef(int w, int h, void* s, size_t r, sk_sp d) + : SkPixelRef(w, h, s, r), fData(std::move(d)) {} + }; + void* pixels = const_cast(data->data()); + sk_sp pr(new PixelRef(info.width(), info.height(), pixels, rowBytes, + std::move(data))); + pr->setImmutable(); // since we were created with (immutable) data + return pr; +} diff --git a/gfx/skia/skia/src/core/SkMask.cpp b/gfx/skia/skia/src/core/SkMask.cpp new file mode 100644 index 0000000000..d072b2297f --- /dev/null +++ b/gfx/skia/skia/src/core/SkMask.cpp @@ -0,0 +1,118 @@ +/* + * Copyright 2007 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkMask.h" + +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" + +#include + +/** returns the product if it is positive and fits in 31 bits. Otherwise this + returns 0. + */ +static int32_t safeMul32(int32_t a, int32_t b) { + int64_t size = sk_64_mul(a, b); + if (size > 0 && SkTFitsIn(size)) { + return size; + } + return 0; +} + +size_t SkMask::computeImageSize() const { + return safeMul32(fBounds.height(), fRowBytes); +} + +size_t SkMask::computeTotalImageSize() const { + size_t size = this->computeImageSize(); + if (fFormat == SkMask::k3D_Format) { + size = safeMul32(SkToS32(size), 3); + } + return size; +} + +/** We explicitly use this allocator for SkBimap pixels, so that we can + freely assign memory allocated by one class to the other. +*/ +uint8_t* SkMask::AllocImage(size_t size, AllocType at) { + size_t aligned_size = SkSafeMath::Align4(size); + unsigned flags = SK_MALLOC_THROW; + if (at == kZeroInit_Alloc) { + flags |= SK_MALLOC_ZERO_INITIALIZE; + } + return static_cast(sk_malloc_flags(aligned_size, flags)); +} + +/** We explicitly use this allocator for SkBimap pixels, so that we can + freely assign memory allocated by one class to the other. +*/ +void SkMask::FreeImage(void* image) { + sk_free(image); +} + +SkMask SkMask::PrepareDestination(int radiusX, int radiusY, const SkMask& src) { + SkSafeMath safe; + + SkMask dst; + dst.fImage = nullptr; + dst.fFormat = SkMask::kA8_Format; + + // dstW = srcW + 2 * radiusX; + size_t dstW = safe.add(src.fBounds.width(), safe.add(radiusX, radiusX)); + // dstH = srcH + 2 * radiusY; + size_t dstH = safe.add(src.fBounds.height(), safe.add(radiusY, radiusY)); + + size_t toAlloc = safe.mul(dstW, dstH); + + // We can only deal with masks that fit in INT_MAX and sides that fit in int. + if (!SkTFitsIn(dstW) || !SkTFitsIn(dstH) || toAlloc > INT_MAX || !safe) { + dst.fBounds.setEmpty(); + dst.fRowBytes = 0; + return dst; + } + + dst.fBounds.setWH(SkTo(dstW), SkTo(dstH)); + dst.fBounds.offset(src.fBounds.x(), src.fBounds.y()); + dst.fBounds.offset(-radiusX, -radiusY); + dst.fRowBytes = SkTo(dstW); + + if (src.fImage != nullptr) { + dst.fImage = SkMask::AllocImage(toAlloc); + } + + return dst; +} + + +/////////////////////////////////////////////////////////////////////////////// + +static const int gMaskFormatToShift[] = { + ~0, // BW -- not supported + 0, // A8 + 0, // 3D + 2, // ARGB32 + 1, // LCD16 + 0, // SDF +}; + +static int maskFormatToShift(SkMask::Format format) { + SkASSERT((unsigned)format < std::size(gMaskFormatToShift)); + SkASSERT(SkMask::kBW_Format != format); + return gMaskFormatToShift[format]; +} + +void* SkMask::getAddr(int x, int y) const { + SkASSERT(kBW_Format != fFormat); + SkASSERT(fBounds.contains(x, y)); + SkASSERT(fImage); + + char* addr = (char*)fImage; + addr += (y - fBounds.fTop) * fRowBytes; + addr += (x - fBounds.fLeft) << maskFormatToShift(fFormat); + return addr; +} diff --git a/gfx/skia/skia/src/core/SkMask.h b/gfx/skia/skia/src/core/SkMask.h new file mode 100644 index 0000000000..619dfcf76d --- /dev/null +++ b/gfx/skia/skia/src/core/SkMask.h @@ -0,0 +1,243 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMask_DEFINED +#define SkMask_DEFINED + +#include "include/core/SkRect.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTemplates.h" + +#include + +/** \class SkMask + SkMask is used to describe alpha bitmaps, either 1bit, 8bit, or + the 3-channel 3D format. These are passed to SkMaskFilter objects. +*/ +struct SkMask { + SkMask() : fImage(nullptr) {} + + enum Format : uint8_t { + kBW_Format, //!< 1bit per pixel mask (e.g. monochrome) + kA8_Format, //!< 8bits per pixel mask (e.g. antialiasing) + k3D_Format, //!< 3 8bit per pixl planes: alpha, mul, add + kARGB32_Format, //!< SkPMColor + kLCD16_Format, //!< 565 alpha for r/g/b + kSDF_Format, //!< 8bits representing signed distance field + }; + + enum { + kCountMaskFormats = kSDF_Format + 1 + }; + + uint8_t* fImage; + SkIRect fBounds; + uint32_t fRowBytes; + Format fFormat; + + static bool IsValidFormat(uint8_t format) { return format < kCountMaskFormats; } + + /** Returns true if the mask is empty: i.e. it has an empty bounds. + */ + bool isEmpty() const { return fBounds.isEmpty(); } + + /** Return the byte size of the mask, assuming only 1 plane. + Does not account for k3D_Format. For that, use computeTotalImageSize(). + If there is an overflow of 32bits, then returns 0. + */ + size_t computeImageSize() const; + + /** Return the byte size of the mask, taking into account + any extra planes (e.g. k3D_Format). + If there is an overflow of 32bits, then returns 0. + */ + size_t computeTotalImageSize() const; + + /** Returns the address of the byte that holds the specified bit. + Asserts that the mask is kBW_Format, and that x,y are in range. + x,y are in the same coordiate space as fBounds. + */ + uint8_t* getAddr1(int x, int y) const { + SkASSERT(kBW_Format == fFormat); + SkASSERT(fBounds.contains(x, y)); + SkASSERT(fImage != nullptr); + return fImage + ((x - fBounds.fLeft) >> 3) + (y - fBounds.fTop) * fRowBytes; + } + + /** Returns the address of the specified byte. + Asserts that the mask is kA8_Format, and that x,y are in range. + x,y are in the same coordiate space as fBounds. + */ + uint8_t* getAddr8(int x, int y) const { + SkASSERT(kA8_Format == fFormat || kSDF_Format == fFormat); + SkASSERT(fBounds.contains(x, y)); + SkASSERT(fImage != nullptr); + return fImage + x - fBounds.fLeft + (y - fBounds.fTop) * fRowBytes; + } + + /** + * Return the address of the specified 16bit mask. In the debug build, + * this asserts that the mask's format is kLCD16_Format, and that (x,y) + * are contained in the mask's fBounds. + */ + uint16_t* getAddrLCD16(int x, int y) const { + SkASSERT(kLCD16_Format == fFormat); + SkASSERT(fBounds.contains(x, y)); + SkASSERT(fImage != nullptr); + uint16_t* row = (uint16_t*)(fImage + (y - fBounds.fTop) * fRowBytes); + return row + (x - fBounds.fLeft); + } + + /** + * Return the address of the specified 32bit mask. In the debug build, + * this asserts that the mask's format is 32bits, and that (x,y) + * are contained in the mask's fBounds. + */ + uint32_t* getAddr32(int x, int y) const { + SkASSERT(kARGB32_Format == fFormat); + SkASSERT(fBounds.contains(x, y)); + SkASSERT(fImage != nullptr); + uint32_t* row = (uint32_t*)(fImage + (y - fBounds.fTop) * fRowBytes); + return row + (x - fBounds.fLeft); + } + + /** + * Returns the address of the specified pixel, computing the pixel-size + * at runtime based on the mask format. This will be slightly slower than + * using one of the routines where the format is implied by the name + * e.g. getAddr8 or getAddr32. + * + * x,y must be contained by the mask's bounds (this is asserted in the + * debug build, but not checked in the release build.) + * + * This should not be called with kBW_Format, as it will give unspecified + * results (and assert in the debug build). + */ + void* getAddr(int x, int y) const; + + enum AllocType { + kUninit_Alloc, + kZeroInit_Alloc, + }; + static uint8_t* AllocImage(size_t bytes, AllocType = kUninit_Alloc); + static void FreeImage(void* image); + + enum CreateMode { + kJustComputeBounds_CreateMode, //!< compute bounds and return + kJustRenderImage_CreateMode, //!< render into preallocate mask + kComputeBoundsAndRenderImage_CreateMode //!< compute bounds, alloc image and render into it + }; + + /** Iterates over the coverage values along a scanline in a given SkMask::Format. Provides + * constructor, copy constructor for creating + * operator++, operator-- for iterating over the coverage values on a scanline + * operator>>= to add row bytes + * operator* to get the coverage value at the current location + * operator< to compare two iterators + */ + template struct AlphaIter; + + /** + * Returns initial destination mask data padded by radiusX and radiusY + */ + static SkMask PrepareDestination(int radiusX, int radiusY, const SkMask& src); +}; + +template <> struct SkMask::AlphaIter { + AlphaIter(const uint8_t* ptr, int offset) : fPtr(ptr), fOffset(7 - offset) {} + AlphaIter(const AlphaIter& that) : fPtr(that.fPtr), fOffset(that.fOffset) {} + AlphaIter& operator++() { + if (0 < fOffset ) { + --fOffset; + } else { + ++fPtr; + fOffset = 7; + } + return *this; + } + AlphaIter& operator--() { + if (fOffset < 7) { + ++fOffset; + } else { + --fPtr; + fOffset = 0; + } + return *this; + } + AlphaIter& operator>>=(uint32_t rb) { + fPtr = SkTAddOffset(fPtr, rb); + return *this; + } + uint8_t operator*() const { return ((*fPtr) >> fOffset) & 1 ? 0xFF : 0; } + bool operator<(const AlphaIter& that) const { + return fPtr < that.fPtr || (fPtr == that.fPtr && fOffset > that.fOffset); + } + const uint8_t* fPtr; + int fOffset; +}; + +template <> struct SkMask::AlphaIter { + AlphaIter(const uint8_t* ptr) : fPtr(ptr) {} + AlphaIter(const AlphaIter& that) : fPtr(that.fPtr) {} + AlphaIter& operator++() { ++fPtr; return *this; } + AlphaIter& operator--() { --fPtr; return *this; } + AlphaIter& operator>>=(uint32_t rb) { + fPtr = SkTAddOffset(fPtr, rb); + return *this; + } + uint8_t operator*() const { return *fPtr; } + bool operator<(const AlphaIter& that) const { return fPtr < that.fPtr; } + const uint8_t* fPtr; +}; + +template <> struct SkMask::AlphaIter { + AlphaIter(const uint32_t* ptr) : fPtr(ptr) {} + AlphaIter(const AlphaIter& that) : fPtr(that.fPtr) {} + AlphaIter& operator++() { ++fPtr; return *this; } + AlphaIter& operator--() { --fPtr; return *this; } + AlphaIter& operator>>=(uint32_t rb) { + fPtr = SkTAddOffset(fPtr, rb); + return *this; + } + uint8_t operator*() const { return SkGetPackedA32(*fPtr); } + bool operator<(const AlphaIter& that) const { return fPtr < that.fPtr; } + const uint32_t* fPtr; +}; + +template <> struct SkMask::AlphaIter { + AlphaIter(const uint16_t* ptr) : fPtr(ptr) {} + AlphaIter(const AlphaIter& that) : fPtr(that.fPtr) {} + AlphaIter& operator++() { ++fPtr; return *this; } + AlphaIter& operator--() { --fPtr; return *this; } + AlphaIter& operator>>=(uint32_t rb) { + fPtr = SkTAddOffset(fPtr, rb); + return *this; + } + uint8_t operator*() const { + unsigned packed = *fPtr; + unsigned r = SkPacked16ToR32(packed); + unsigned g = SkPacked16ToG32(packed); + unsigned b = SkPacked16ToB32(packed); + return (r + g + b) / 3; + } + bool operator<(const AlphaIter& that) const { return fPtr < that.fPtr; } + const uint16_t* fPtr; +}; + +/////////////////////////////////////////////////////////////////////////////// + +/** + * \using SkAutoMaskImage + * + * Stack class used to manage the fImage buffer in a SkMask. + * When this object loses scope, the buffer is freed with SkMask::FreeImage(). + */ +using SkAutoMaskFreeImage = + std::unique_ptr>; + +#endif diff --git a/gfx/skia/skia/src/core/SkMaskBlurFilter.cpp b/gfx/skia/skia/src/core/SkMaskBlurFilter.cpp new file mode 100644 index 0000000000..f159dbc571 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskBlurFilter.cpp @@ -0,0 +1,1054 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkMaskBlurFilter.h" + +#include "include/core/SkColorPriv.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkVx.h" +#include "src/core/SkGaussFilter.h" + +#include +#include + +namespace { +static const double kPi = 3.14159265358979323846264338327950288; + +class PlanGauss final { +public: + explicit PlanGauss(double sigma) { + auto possibleWindow = static_cast(floor(sigma * 3 * sqrt(2 * kPi) / 4 + 0.5)); + auto window = std::max(1, possibleWindow); + + fPass0Size = window - 1; + fPass1Size = window - 1; + fPass2Size = (window & 1) == 1 ? window - 1 : window; + + // Calculating the border is tricky. I will go through the odd case which is simpler, and + // then through the even case. Given a stack of filters seven wide for the odd case of + // three passes. + // + // S + // aaaAaaa + // bbbBbbb + // cccCccc + // D + // + // The furthest changed pixel is when the filters are in the following configuration. + // + // S + // aaaAaaa + // bbbBbbb + // cccCccc + // D + // + // The A pixel is calculated using the value S, the B uses A, and the C uses B, and + // finally D is C. So, with a window size of seven the border is nine. In general, the + // border is 3*((window - 1)/2). + // + // For even cases the filter stack is more complicated. The spec specifies two passes + // of even filters and a final pass of odd filters. A stack for a width of six looks like + // this. + // + // S + // aaaAaa + // bbBbbb + // cccCccc + // D + // + // The furthest pixel looks like this. + // + // S + // aaaAaa + // bbBbbb + // cccCccc + // D + // + // For a window of size, the border value is seven. In general the border is 3 * + // (window/2) -1. + fBorder = (window & 1) == 1 ? 3 * ((window - 1) / 2) : 3 * (window / 2) - 1; + fSlidingWindow = 2 * fBorder + 1; + + // If the window is odd then the divisor is just window ^ 3 otherwise, + // it is window * window * (window + 1) = window ^ 2 + window ^ 3; + auto window2 = window * window; + auto window3 = window2 * window; + auto divisor = (window & 1) == 1 ? window3 : window3 + window2; + + fWeight = static_cast(round(1.0 / divisor * (1ull << 32))); + } + + size_t bufferSize() const { return fPass0Size + fPass1Size + fPass2Size; } + + int border() const { return fBorder; } + +public: + class Scan { + public: + Scan(uint64_t weight, int noChangeCount, + uint32_t* buffer0, uint32_t* buffer0End, + uint32_t* buffer1, uint32_t* buffer1End, + uint32_t* buffer2, uint32_t* buffer2End) + : fWeight{weight} + , fNoChangeCount{noChangeCount} + , fBuffer0{buffer0} + , fBuffer0End{buffer0End} + , fBuffer1{buffer1} + , fBuffer1End{buffer1End} + , fBuffer2{buffer2} + , fBuffer2End{buffer2End} + { } + + template void blur(const AlphaIter srcBegin, const AlphaIter srcEnd, + uint8_t* dst, int dstStride, uint8_t* dstEnd) const { + auto buffer0Cursor = fBuffer0; + auto buffer1Cursor = fBuffer1; + auto buffer2Cursor = fBuffer2; + + std::memset(fBuffer0, 0x00, (fBuffer2End - fBuffer0) * sizeof(*fBuffer0)); + + uint32_t sum0 = 0; + uint32_t sum1 = 0; + uint32_t sum2 = 0; + + // Consume the source generating pixels. + for (AlphaIter src = srcBegin; src < srcEnd; ++src, dst += dstStride) { + uint32_t leadingEdge = *src; + sum0 += leadingEdge; + sum1 += sum0; + sum2 += sum1; + + *dst = this->finalScale(sum2); + + sum2 -= *buffer2Cursor; + *buffer2Cursor = sum1; + buffer2Cursor = (buffer2Cursor + 1) < fBuffer2End ? buffer2Cursor + 1 : fBuffer2; + + sum1 -= *buffer1Cursor; + *buffer1Cursor = sum0; + buffer1Cursor = (buffer1Cursor + 1) < fBuffer1End ? buffer1Cursor + 1 : fBuffer1; + + sum0 -= *buffer0Cursor; + *buffer0Cursor = leadingEdge; + buffer0Cursor = (buffer0Cursor + 1) < fBuffer0End ? buffer0Cursor + 1 : fBuffer0; + } + + // The leading edge is off the right side of the mask. + for (int i = 0; i < fNoChangeCount; i++) { + uint32_t leadingEdge = 0; + sum0 += leadingEdge; + sum1 += sum0; + sum2 += sum1; + + *dst = this->finalScale(sum2); + + sum2 -= *buffer2Cursor; + *buffer2Cursor = sum1; + buffer2Cursor = (buffer2Cursor + 1) < fBuffer2End ? buffer2Cursor + 1 : fBuffer2; + + sum1 -= *buffer1Cursor; + *buffer1Cursor = sum0; + buffer1Cursor = (buffer1Cursor + 1) < fBuffer1End ? buffer1Cursor + 1 : fBuffer1; + + sum0 -= *buffer0Cursor; + *buffer0Cursor = leadingEdge; + buffer0Cursor = (buffer0Cursor + 1) < fBuffer0End ? buffer0Cursor + 1 : fBuffer0; + + dst += dstStride; + } + + // Starting from the right, fill in the rest of the buffer. + std::memset(fBuffer0, 0, (fBuffer2End - fBuffer0) * sizeof(*fBuffer0)); + + sum0 = sum1 = sum2 = 0; + + uint8_t* dstCursor = dstEnd; + AlphaIter src = srcEnd; + while (dstCursor > dst) { + dstCursor -= dstStride; + uint32_t leadingEdge = *(--src); + sum0 += leadingEdge; + sum1 += sum0; + sum2 += sum1; + + *dstCursor = this->finalScale(sum2); + + sum2 -= *buffer2Cursor; + *buffer2Cursor = sum1; + buffer2Cursor = (buffer2Cursor + 1) < fBuffer2End ? buffer2Cursor + 1 : fBuffer2; + + sum1 -= *buffer1Cursor; + *buffer1Cursor = sum0; + buffer1Cursor = (buffer1Cursor + 1) < fBuffer1End ? buffer1Cursor + 1 : fBuffer1; + + sum0 -= *buffer0Cursor; + *buffer0Cursor = leadingEdge; + buffer0Cursor = (buffer0Cursor + 1) < fBuffer0End ? buffer0Cursor + 1 : fBuffer0; + } + } + + private: + inline static constexpr uint64_t kHalf = static_cast(1) << 31; + + uint8_t finalScale(uint32_t sum) const { + return SkTo((fWeight * sum + kHalf) >> 32); + } + + uint64_t fWeight; + int fNoChangeCount; + uint32_t* fBuffer0; + uint32_t* fBuffer0End; + uint32_t* fBuffer1; + uint32_t* fBuffer1End; + uint32_t* fBuffer2; + uint32_t* fBuffer2End; + }; + + Scan makeBlurScan(int width, uint32_t* buffer) const { + uint32_t* buffer0, *buffer0End, *buffer1, *buffer1End, *buffer2, *buffer2End; + buffer0 = buffer; + buffer0End = buffer1 = buffer0 + fPass0Size; + buffer1End = buffer2 = buffer1 + fPass1Size; + buffer2End = buffer2 + fPass2Size; + int noChangeCount = fSlidingWindow > width ? fSlidingWindow - width : 0; + + return Scan( + fWeight, noChangeCount, + buffer0, buffer0End, + buffer1, buffer1End, + buffer2, buffer2End); + } + + uint64_t fWeight; + int fBorder; + int fSlidingWindow; + int fPass0Size; + int fPass1Size; + int fPass2Size; +}; + +} // namespace + +// NB 135 is the largest sigma that will not cause a buffer full of 255 mask values to overflow +// using the Gauss filter. It also limits the size of buffers used hold intermediate values. The +// additional + 1 added to window represents adding one more leading element before subtracting the +// trailing element. +// Explanation of maximums: +// sum0 = (window + 1) * 255 +// sum1 = (window + 1) * sum0 -> (window + 1) * (window + 1) * 255 +// sum2 = (window + 1) * sum1 -> (window + 1) * (window + 1) * (window + 1) * 255 -> window^3 * 255 +// +// The value (window + 1)^3 * 255 must fit in a uint32_t. So, +// (window + 1)^3 * 255 < 2^32. window = 255. +// +// window = floor(sigma * 3 * sqrt(2 * kPi) / 4) +// For window <= 255, the largest value for sigma is 135. +SkMaskBlurFilter::SkMaskBlurFilter(double sigmaW, double sigmaH) + : fSigmaW{SkTPin(sigmaW, 0.0, 135.0)} + , fSigmaH{SkTPin(sigmaH, 0.0, 135.0)} +{ + SkASSERT(sigmaW >= 0); + SkASSERT(sigmaH >= 0); +} + +bool SkMaskBlurFilter::hasNoBlur() const { + return (3 * fSigmaW <= 1) && (3 * fSigmaH <= 1); +} + +// We favor A8 masks, and if we need to work with another format, we'll convert to A8 first. +// Each of these converts width (up to 8) mask values to A8. +static void bw_to_a8(uint8_t* a8, const uint8_t* from, int width) { + SkASSERT(0 < width && width <= 8); + + uint8_t masks = *from; + for (int i = 0; i < width; ++i) { + a8[i] = (masks >> (7 - i)) & 1 ? 0xFF + : 0x00; + } +} +static void lcd_to_a8(uint8_t* a8, const uint8_t* from, int width) { + SkASSERT(0 < width && width <= 8); + + for (int i = 0; i < width; ++i) { + unsigned rgb = reinterpret_cast(from)[i], + r = SkPacked16ToR32(rgb), + g = SkPacked16ToG32(rgb), + b = SkPacked16ToB32(rgb); + a8[i] = (r + g + b) / 3; + } +} +static void argb32_to_a8(uint8_t* a8, const uint8_t* from, int width) { + SkASSERT(0 < width && width <= 8); + for (int i = 0; i < width; ++i) { + uint32_t rgba = reinterpret_cast(from)[i]; + a8[i] = SkGetPackedA32(rgba); + } +} +using ToA8 = decltype(bw_to_a8); + +using fp88 = skvx::Vec<8, uint16_t>; // 8-wide fixed point 8.8 + +static fp88 load(const uint8_t* from, int width, ToA8* toA8) { + // Our fast path is a full 8-byte load of A8. + // So we'll conditionally handle the two slow paths using tmp: + // - if we have a function to convert another mask to A8, use it; + // - if not but we have less than 8 bytes to load, load them one at a time. + uint8_t tmp[8] = {0,0,0,0, 0,0,0,0}; + if (toA8) { + toA8(tmp, from, width); + from = tmp; + } else if (width < 8) { + for (int i = 0; i < width; ++i) { + tmp[i] = from[i]; + } + from = tmp; + } + + // Load A8 and convert to 8.8 fixed-point. + return skvx::cast(skvx::byte8::Load(from)) << 8; +} + +static void store(uint8_t* to, const fp88& v, int width) { + skvx::byte8 b = skvx::cast(v >> 8); + if (width == 8) { + b.store(to); + } else { + uint8_t buffer[8]; + b.store(buffer); + for (int i = 0; i < width; i++) { + to[i] = buffer[i]; + } + } +} + +static constexpr uint16_t _____ = 0u; +static constexpr uint16_t kHalf = 0x80u; + +// In all the blur_x_radius_N and blur_y_radius_N functions the gaussian values are encoded +// in 0.16 format, none of the values is greater than one. The incoming mask values are in 8.8 +// format. The resulting multiply has a 8.24 format, by the mulhi truncates the lower 16 bits +// resulting in a 8.8 format. +// +// The blur_x_radius_N function below blur along a row of pixels using a kernel with radius N. This +// system is setup to minimize the number of multiplies needed. +// +// Explanation: +// Blurring a specific mask value is given by the following equation where D_n is the resulting +// mask value and S_n is the source value. The example below is for a filter with a radius of 1 +// and a width of 3 (radius == (width-1)/2). The indexes for the source and destination are +// aligned. The filter is given by G_n where n is the symmetric filter value. +// +// D[n] = S[n-1]*G[1] + S[n]*G[0] + S[n+1]*G[1]. +// +// We can start the source index at an offset relative to the destination separated by the +// radius. This results in a non-traditional restating of the above filter. +// +// D[n] = S[n]*G[1] + S[n+1]*G[0] + S[n+2]*G[1] +// +// If we look at three specific consecutive destinations the following equations result: +// +// D[5] = S[5]*G[1] + S[6]*G[0] + S[7]*G[1] +// D[7] = S[6]*G[1] + S[7]*G[0] + S[8]*G[1] +// D[8] = S[7]*G[1] + S[8]*G[0] + S[9]*G[1]. +// +// In the above equations, notice that S[7] is used in all three. In particular, two values are +// used: S[7]*G[0] and S[7]*G[1]. So, S[7] is only multiplied twice, but used in D[5], D[6] and +// D[7]. +// +// From the point of view of a source value we end up with the following three equations. +// +// Given S[7]: +// D[5] += S[7]*G[1] +// D[6] += S[7]*G[0] +// D[7] += S[7]*G[1] +// +// In General: +// D[n] += S[n]*G[1] +// D[n+1] += S[n]*G[0] +// D[n+2] += S[n]*G[1] +// +// Now these equations can be ganged using SIMD to form: +// D[n..n+7] += S[n..n+7]*G[1] +// D[n+1..n+8] += S[n..n+7]*G[0] +// D[n+2..n+9] += S[n..n+7]*G[1] +// The next set of values becomes. +// D[n+8..n+15] += S[n+8..n+15]*G[1] +// D[n+9..n+16] += S[n+8..n+15]*G[0] +// D[n+10..n+17] += S[n+8..n+15]*G[1] +// You can see that the D[n+8] and D[n+9] values overlap the two sets, using parts of both +// S[n..7] and S[n+8..n+15]. +// +// Just one more transformation allows the code to maintain all working values in +// registers. I introduce the notation {0, S[n..n+7] * G[k]} to mean that the value where 0 is +// prepended to the array of values to form {0, S[n] * G[k], ..., S[n+7]*G[k]}. +// +// D[n..n+7] += S[n..n+7] * G[1] +// D[n..n+8] += {0, S[n..n+7] * G[0]} +// D[n..n+9] += {0, 0, S[n..n+7] * G[1]} +// +// Now we can encode D[n..n+7] in a single Sk8h register called d0, and D[n+8..n+15] in a +// register d8. In addition, S[0..n+7] becomes s0. +// +// The translation of the {0, S[n..n+7] * G[k]} is translated in the following way below. +// +// Sk8h v0 = s0*G[0] +// Sk8h v1 = s0*G[1] +// /* D[n..n+7] += S[n..n+7] * G[1] */ +// d0 += v1; +// /* D[n..n+8] += {0, S[n..n+7] * G[0]} */ +// d0 += {_____, v0[0], v0[1], v0[2], v0[3], v0[4], v0[5], v0[6]} +// d1 += {v0[7], _____, _____, _____, _____, _____, _____, _____} +// /* D[n..n+9] += {0, 0, S[n..n+7] * G[1]} */ +// d0 += {_____, _____, v1[0], v1[1], v1[2], v1[3], v1[4], v1[5]} +// d1 += {v1[6], v1[7], _____, _____, _____, _____, _____, _____} +// Where we rely on the compiler to generate efficient code for the {____, n, ....} notation. + +static void blur_x_radius_1( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88&, const fp88&, const fp88&, + fp88* d0, fp88* d8) { + + auto v1 = mulhi(s0, g1); + auto v0 = mulhi(s0, g0); + + // D[n..n+7] += S[n..n+7] * G[1] + *d0 += v1; + + //D[n..n+8] += {0, S[n..n+7] * G[0]} + *d0 += fp88{_____, v0[0], v0[1], v0[2], v0[3], v0[4], v0[5], v0[6]}; + *d8 += fp88{v0[7], _____, _____, _____, _____, _____, _____, _____}; + + // D[n..n+9] += {0, 0, S[n..n+7] * G[1]} + *d0 += fp88{_____, _____, v1[0], v1[1], v1[2], v1[3], v1[4], v1[5]}; + *d8 += fp88{v1[6], v1[7], _____, _____, _____, _____, _____, _____}; + +} + +static void blur_x_radius_2( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88&, const fp88&, + fp88* d0, fp88* d8) { + auto v0 = mulhi(s0, g0); + auto v1 = mulhi(s0, g1); + auto v2 = mulhi(s0, g2); + + // D[n..n+7] += S[n..n+7] * G[2] + *d0 += v2; + + // D[n..n+8] += {0, S[n..n+7] * G[1]} + *d0 += fp88{_____, v1[0], v1[1], v1[2], v1[3], v1[4], v1[5], v1[6]}; + *d8 += fp88{v1[7], _____, _____, _____, _____, _____, _____, _____}; + + // D[n..n+9] += {0, 0, S[n..n+7] * G[0]} + *d0 += fp88{_____, _____, v0[0], v0[1], v0[2], v0[3], v0[4], v0[5]}; + *d8 += fp88{v0[6], v0[7], _____, _____, _____, _____, _____, _____}; + + // D[n..n+10] += {0, 0, 0, S[n..n+7] * G[1]} + *d0 += fp88{_____, _____, _____, v1[0], v1[1], v1[2], v1[3], v1[4]}; + *d8 += fp88{v1[5], v1[6], v1[7], _____, _____, _____, _____, _____}; + + // D[n..n+11] += {0, 0, 0, 0, S[n..n+7] * G[2]} + *d0 += fp88{_____, _____, _____, _____, v2[0], v2[1], v2[2], v2[3]}; + *d8 += fp88{v2[4], v2[5], v2[6], v2[7], _____, _____, _____, _____}; +} + +static void blur_x_radius_3( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88& g3, const fp88&, + fp88* d0, fp88* d8) { + auto v0 = mulhi(s0, g0); + auto v1 = mulhi(s0, g1); + auto v2 = mulhi(s0, g2); + auto v3 = mulhi(s0, g3); + + // D[n..n+7] += S[n..n+7] * G[3] + *d0 += v3; + + // D[n..n+8] += {0, S[n..n+7] * G[2]} + *d0 += fp88{_____, v2[0], v2[1], v2[2], v2[3], v2[4], v2[5], v2[6]}; + *d8 += fp88{v2[7], _____, _____, _____, _____, _____, _____, _____}; + + // D[n..n+9] += {0, 0, S[n..n+7] * G[1]} + *d0 += fp88{_____, _____, v1[0], v1[1], v1[2], v1[3], v1[4], v1[5]}; + *d8 += fp88{v1[6], v1[7], _____, _____, _____, _____, _____, _____}; + + // D[n..n+10] += {0, 0, 0, S[n..n+7] * G[0]} + *d0 += fp88{_____, _____, _____, v0[0], v0[1], v0[2], v0[3], v0[4]}; + *d8 += fp88{v0[5], v0[6], v0[7], _____, _____, _____, _____, _____}; + + // D[n..n+11] += {0, 0, 0, 0, S[n..n+7] * G[1]} + *d0 += fp88{_____, _____, _____, _____, v1[0], v1[1], v1[2], v1[3]}; + *d8 += fp88{v1[4], v1[5], v1[6], v1[7], _____, _____, _____, _____}; + + // D[n..n+12] += {0, 0, 0, 0, 0, S[n..n+7] * G[2]} + *d0 += fp88{_____, _____, _____, _____, _____, v2[0], v2[1], v2[2]}; + *d8 += fp88{v2[3], v2[4], v2[5], v2[6], v2[7], _____, _____, _____}; + + // D[n..n+13] += {0, 0, 0, 0, 0, 0, S[n..n+7] * G[3]} + *d0 += fp88{_____, _____, _____, _____, _____, _____, v3[0], v3[1]}; + *d8 += fp88{v3[2], v3[3], v3[4], v3[5], v3[6], v3[7], _____, _____}; +} + +static void blur_x_radius_4( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88& g3, const fp88& g4, + fp88* d0, fp88* d8) { + auto v0 = mulhi(s0, g0); + auto v1 = mulhi(s0, g1); + auto v2 = mulhi(s0, g2); + auto v3 = mulhi(s0, g3); + auto v4 = mulhi(s0, g4); + + // D[n..n+7] += S[n..n+7] * G[4] + *d0 += v4; + + // D[n..n+8] += {0, S[n..n+7] * G[3]} + *d0 += fp88{_____, v3[0], v3[1], v3[2], v3[3], v3[4], v3[5], v3[6]}; + *d8 += fp88{v3[7], _____, _____, _____, _____, _____, _____, _____}; + + // D[n..n+9] += {0, 0, S[n..n+7] * G[2]} + *d0 += fp88{_____, _____, v2[0], v2[1], v2[2], v2[3], v2[4], v2[5]}; + *d8 += fp88{v2[6], v2[7], _____, _____, _____, _____, _____, _____}; + + // D[n..n+10] += {0, 0, 0, S[n..n+7] * G[1]} + *d0 += fp88{_____, _____, _____, v1[0], v1[1], v1[2], v1[3], v1[4]}; + *d8 += fp88{v1[5], v1[6], v1[7], _____, _____, _____, _____, _____}; + + // D[n..n+11] += {0, 0, 0, 0, S[n..n+7] * G[0]} + *d0 += fp88{_____, _____, _____, _____, v0[0], v0[1], v0[2], v0[3]}; + *d8 += fp88{v0[4], v0[5], v0[6], v0[7], _____, _____, _____, _____}; + + // D[n..n+12] += {0, 0, 0, 0, 0, S[n..n+7] * G[1]} + *d0 += fp88{_____, _____, _____, _____, _____, v1[0], v1[1], v1[2]}; + *d8 += fp88{v1[3], v1[4], v1[5], v1[6], v1[7], _____, _____, _____}; + + // D[n..n+13] += {0, 0, 0, 0, 0, 0, S[n..n+7] * G[2]} + *d0 += fp88{_____, _____, _____, _____, _____, _____, v2[0], v2[1]}; + *d8 += fp88{v2[2], v2[3], v2[4], v2[5], v2[6], v2[7], _____, _____}; + + // D[n..n+14] += {0, 0, 0, 0, 0, 0, 0, S[n..n+7] * G[3]} + *d0 += fp88{_____, _____, _____, _____, _____, _____, _____, v3[0]}; + *d8 += fp88{v3[1], v3[2], v3[3], v3[4], v3[5], v3[6], v3[7], _____}; + + // D[n..n+15] += {0, 0, 0, 0, 0, 0, 0, 0, S[n..n+7] * G[4]} + *d8 += v4; +} + +using BlurX = decltype(blur_x_radius_1); + +// BlurX will only be one of the functions blur_x_radius_(1|2|3|4). +static void blur_row( + BlurX blur, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88& g3, const fp88& g4, + const uint8_t* src, int srcW, + uint8_t* dst, int dstW) { + // Clear the buffer to handle summing wider than source. + fp88 d0(kHalf), d8(kHalf); + + // Go by multiples of 8 in src. + int x = 0; + for (; x <= srcW - 8; x += 8) { + blur(load(src, 8, nullptr), g0, g1, g2, g3, g4, &d0, &d8); + + store(dst, d0, 8); + + d0 = d8; + d8 = fp88(kHalf); + + src += 8; + dst += 8; + } + + // There are src values left, but the remainder of src values is not a multiple of 8. + int srcTail = srcW - x; + if (srcTail > 0) { + + blur(load(src, srcTail, nullptr), g0, g1, g2, g3, g4, &d0, &d8); + + int dstTail = std::min(8, dstW - x); + store(dst, d0, dstTail); + + d0 = d8; + dst += dstTail; + x += dstTail; + } + + // There are dst mask values to complete. + int dstTail = dstW - x; + if (dstTail > 0) { + store(dst, d0, dstTail); + } +} + +// BlurX will only be one of the functions blur_x_radius_(1|2|3|4). +static void blur_x_rect(BlurX blur, + uint16_t* gauss, + const uint8_t* src, size_t srcStride, int srcW, + uint8_t* dst, size_t dstStride, int dstW, int dstH) { + + fp88 g0(gauss[0]), + g1(gauss[1]), + g2(gauss[2]), + g3(gauss[3]), + g4(gauss[4]); + + // Blur *ALL* the rows. + for (int y = 0; y < dstH; y++) { + blur_row(blur, g0, g1, g2, g3, g4, src, srcW, dst, dstW); + src += srcStride; + dst += dstStride; + } +} + +static void direct_blur_x(int radius, uint16_t* gauss, + const uint8_t* src, size_t srcStride, int srcW, + uint8_t* dst, size_t dstStride, int dstW, int dstH) { + + switch (radius) { + case 1: + blur_x_rect(blur_x_radius_1, gauss, src, srcStride, srcW, dst, dstStride, dstW, dstH); + break; + + case 2: + blur_x_rect(blur_x_radius_2, gauss, src, srcStride, srcW, dst, dstStride, dstW, dstH); + break; + + case 3: + blur_x_rect(blur_x_radius_3, gauss, src, srcStride, srcW, dst, dstStride, dstW, dstH); + break; + + case 4: + blur_x_rect(blur_x_radius_4, gauss, src, srcStride, srcW, dst, dstStride, dstW, dstH); + break; + + default: + SkASSERTF(false, "The radius %d is not handled\n", radius); + } +} + +// The operations of the blur_y_radius_N functions work on a theme similar to the blur_x_radius_N +// functions, but end up being simpler because there is no complicated shift of registers. We +// start with the non-traditional form of the gaussian filter. In the following r is the value +// when added generates the next value in the column. +// +// D[n+0r] = S[n+0r]*G[1] +// + S[n+1r]*G[0] +// + S[n+2r]*G[1] +// +// Expanding out in a way similar to blur_x_radius_N for specific values of n. +// +// D[n+0r] = S[n-2r]*G[1] + S[n-1r]*G[0] + S[n+0r]*G[1] +// D[n+1r] = S[n-1r]*G[1] + S[n+0r]*G[0] + S[n+1r]*G[1] +// D[n+2r] = S[n+0r]*G[1] + S[n+1r]*G[0] + S[n+2r]*G[1] +// +// We can see that S[n+0r] is in all three D[] equations, but is only multiplied twice. Now we +// can look at the calculation form the point of view of a source value. +// +// Given S[n+0r]: +// D[n+0r] += S[n+0r]*G[1]; +// /* D[n+0r] is done and can be stored now. */ +// D[n+1r] += S[n+0r]*G[0]; +// D[n+2r] = S[n+0r]*G[1]; +// +// Remember, by induction, that D[n+0r] == S[n-2r]*G[1] + S[n-1r]*G[0] before adding in +// S[n+0r]*G[1]. So, after the addition D[n+0r] has finished calculation and can be stored. Also, +// notice that D[n+2r] is receiving its first value from S[n+0r]*G[1] and is not added in. Notice +// how values flow in the following two iterations in source. +// +// D[n+0r] += S[n+0r]*G[1] +// D[n+1r] += S[n+0r]*G[0] +// D[n+2r] = S[n+0r]*G[1] +// /* ------- */ +// D[n+1r] += S[n+1r]*G[1] +// D[n+2r] += S[n+1r]*G[0] +// D[n+3r] = S[n+1r]*G[1] +// +// Instead of using memory we can introduce temporaries d01 and d12. The update step changes +// to the following. +// +// answer = d01 + S[n+0r]*G[1] +// d01 = d12 + S[n+0r]*G[0] +// d12 = S[n+0r]*G[1] +// return answer +// +// Finally, this can be ganged into SIMD style. +// answer[0..7] = d01[0..7] + S[n+0r..n+0r+7]*G[1] +// d01[0..7] = d12[0..7] + S[n+0r..n+0r+7]*G[0] +// d12[0..7] = S[n+0r..n+0r+7]*G[1] +// return answer[0..7] +static fp88 blur_y_radius_1( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88&, const fp88&, const fp88&, + fp88* d01, fp88* d12, fp88*, fp88*, fp88*, fp88*, fp88*, fp88*) { + auto v0 = mulhi(s0, g0); + auto v1 = mulhi(s0, g1); + + fp88 answer = *d01 + v1; + *d01 = *d12 + v0; + *d12 = v1 + kHalf; + + return answer; +} + +static fp88 blur_y_radius_2( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88&, const fp88&, + fp88* d01, fp88* d12, fp88* d23, fp88* d34, fp88*, fp88*, fp88*, fp88*) { + auto v0 = mulhi(s0, g0); + auto v1 = mulhi(s0, g1); + auto v2 = mulhi(s0, g2); + + fp88 answer = *d01 + v2; + *d01 = *d12 + v1; + *d12 = *d23 + v0; + *d23 = *d34 + v1; + *d34 = v2 + kHalf; + + return answer; +} + +static fp88 blur_y_radius_3( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88& g3, const fp88&, + fp88* d01, fp88* d12, fp88* d23, fp88* d34, fp88* d45, fp88* d56, fp88*, fp88*) { + auto v0 = mulhi(s0, g0); + auto v1 = mulhi(s0, g1); + auto v2 = mulhi(s0, g2); + auto v3 = mulhi(s0, g3); + + fp88 answer = *d01 + v3; + *d01 = *d12 + v2; + *d12 = *d23 + v1; + *d23 = *d34 + v0; + *d34 = *d45 + v1; + *d45 = *d56 + v2; + *d56 = v3 + kHalf; + + return answer; +} + +static fp88 blur_y_radius_4( + const fp88& s0, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88& g3, const fp88& g4, + fp88* d01, fp88* d12, fp88* d23, fp88* d34, fp88* d45, fp88* d56, fp88* d67, fp88* d78) { + auto v0 = mulhi(s0, g0); + auto v1 = mulhi(s0, g1); + auto v2 = mulhi(s0, g2); + auto v3 = mulhi(s0, g3); + auto v4 = mulhi(s0, g4); + + fp88 answer = *d01 + v4; + *d01 = *d12 + v3; + *d12 = *d23 + v2; + *d23 = *d34 + v1; + *d34 = *d45 + v0; + *d45 = *d56 + v1; + *d56 = *d67 + v2; + *d67 = *d78 + v3; + *d78 = v4 + kHalf; + + return answer; +} + +using BlurY = decltype(blur_y_radius_1); + +// BlurY will be one of blur_y_radius_(1|2|3|4). +static void blur_column( + ToA8 toA8, + BlurY blur, int radius, int width, + const fp88& g0, const fp88& g1, const fp88& g2, const fp88& g3, const fp88& g4, + const uint8_t* src, size_t srcRB, int srcH, + uint8_t* dst, size_t dstRB) { + fp88 d01(kHalf), d12(kHalf), d23(kHalf), d34(kHalf), + d45(kHalf), d56(kHalf), d67(kHalf), d78(kHalf); + + auto flush = [&](uint8_t* to, const fp88& v0, const fp88& v1) { + store(to, v0, width); + to += dstRB; + store(to, v1, width); + return to + dstRB; + }; + + for (int y = 0; y < srcH; y += 1) { + auto s = load(src, width, toA8); + auto b = blur(s, + g0, g1, g2, g3, g4, + &d01, &d12, &d23, &d34, &d45, &d56, &d67, &d78); + store(dst, b, width); + src += srcRB; + dst += dstRB; + } + + if (radius >= 1) { + dst = flush(dst, d01, d12); + } + if (radius >= 2) { + dst = flush(dst, d23, d34); + } + if (radius >= 3) { + dst = flush(dst, d45, d56); + } + if (radius >= 4) { + flush(dst, d67, d78); + } +} + +// BlurY will be one of blur_y_radius_(1|2|3|4). +static void blur_y_rect(ToA8 toA8, const int strideOf8, + BlurY blur, int radius, uint16_t *gauss, + const uint8_t *src, size_t srcRB, int srcW, int srcH, + uint8_t *dst, size_t dstRB) { + + fp88 g0(gauss[0]), + g1(gauss[1]), + g2(gauss[2]), + g3(gauss[3]), + g4(gauss[4]); + + int x = 0; + for (; x <= srcW - 8; x += 8) { + blur_column(toA8, blur, radius, 8, + g0, g1, g2, g3, g4, + src, srcRB, srcH, + dst, dstRB); + src += strideOf8; + dst += 8; + } + + int xTail = srcW - x; + if (xTail > 0) { + blur_column(toA8, blur, radius, xTail, + g0, g1, g2, g3, g4, + src, srcRB, srcH, + dst, dstRB); + } +} + +static void direct_blur_y(ToA8 toA8, const int strideOf8, + int radius, uint16_t* gauss, + const uint8_t* src, size_t srcRB, int srcW, int srcH, + uint8_t* dst, size_t dstRB) { + + switch (radius) { + case 1: + blur_y_rect(toA8, strideOf8, blur_y_radius_1, 1, gauss, + src, srcRB, srcW, srcH, + dst, dstRB); + break; + + case 2: + blur_y_rect(toA8, strideOf8, blur_y_radius_2, 2, gauss, + src, srcRB, srcW, srcH, + dst, dstRB); + break; + + case 3: + blur_y_rect(toA8, strideOf8, blur_y_radius_3, 3, gauss, + src, srcRB, srcW, srcH, + dst, dstRB); + break; + + case 4: + blur_y_rect(toA8, strideOf8, blur_y_radius_4, 4, gauss, + src, srcRB, srcW, srcH, + dst, dstRB); + break; + + default: + SkASSERTF(false, "The radius %d is not handled\n", radius); + } +} + +static SkIPoint small_blur(double sigmaX, double sigmaY, const SkMask& src, SkMask* dst) { + SkASSERT(sigmaX == sigmaY); // TODO + SkASSERT(0.01 <= sigmaX && sigmaX < 2); + SkASSERT(0.01 <= sigmaY && sigmaY < 2); + + SkGaussFilter filterX{sigmaX}, + filterY{sigmaY}; + + int radiusX = filterX.radius(), + radiusY = filterY.radius(); + + SkASSERT(radiusX <= 4 && radiusY <= 4); + + auto prepareGauss = [](const SkGaussFilter& filter, uint16_t* factors) { + int i = 0; + for (double d : filter) { + factors[i++] = static_cast(round(d * (1 << 16))); + } + }; + + uint16_t gaussFactorsX[SkGaussFilter::kGaussArrayMax], + gaussFactorsY[SkGaussFilter::kGaussArrayMax]; + + prepareGauss(filterX, gaussFactorsX); + prepareGauss(filterY, gaussFactorsY); + + *dst = SkMask::PrepareDestination(radiusX, radiusY, src); + if (src.fImage == nullptr) { + return {SkTo(radiusX), SkTo(radiusY)}; + } + if (dst->fImage == nullptr) { + dst->fBounds.setEmpty(); + return {0, 0}; + } + + int srcW = src.fBounds.width(), + srcH = src.fBounds.height(); + + int dstW = dst->fBounds.width(), + dstH = dst->fBounds.height(); + + size_t srcRB = src.fRowBytes, + dstRB = dst->fRowBytes; + + //TODO: handle bluring in only one direction. + + // Blur vertically and copy to destination. + switch (src.fFormat) { + case SkMask::kBW_Format: + direct_blur_y(bw_to_a8, 1, + radiusY, gaussFactorsY, + src.fImage, srcRB, srcW, srcH, + dst->fImage + radiusX, dstRB); + break; + case SkMask::kA8_Format: + direct_blur_y(nullptr, 8, + radiusY, gaussFactorsY, + src.fImage, srcRB, srcW, srcH, + dst->fImage + radiusX, dstRB); + break; + case SkMask::kARGB32_Format: + direct_blur_y(argb32_to_a8, 32, + radiusY, gaussFactorsY, + src.fImage, srcRB, srcW, srcH, + dst->fImage + radiusX, dstRB); + break; + case SkMask::kLCD16_Format: + direct_blur_y(lcd_to_a8, 16, radiusY, gaussFactorsY, + src.fImage, srcRB, srcW, srcH, + dst->fImage + radiusX, dstRB); + break; + default: + SK_ABORT("Unhandled format."); + } + + // Blur horizontally in place. + direct_blur_x(radiusX, gaussFactorsX, + dst->fImage + radiusX, dstRB, srcW, + dst->fImage, dstRB, dstW, dstH); + + return {radiusX, radiusY}; +} + +// TODO: assuming sigmaW = sigmaH. Allow different sigmas. Right now the +// API forces the sigmas to be the same. +SkIPoint SkMaskBlurFilter::blur(const SkMask& src, SkMask* dst) const { + + if (fSigmaW < 2.0 && fSigmaH < 2.0) { + return small_blur(fSigmaW, fSigmaH, src, dst); + } + + // 1024 is a place holder guess until more analysis can be done. + SkSTArenaAlloc<1024> alloc; + + PlanGauss planW(fSigmaW); + PlanGauss planH(fSigmaH); + + int borderW = planW.border(), + borderH = planH.border(); + SkASSERT(borderH >= 0 && borderW >= 0); + + *dst = SkMask::PrepareDestination(borderW, borderH, src); + if (src.fImage == nullptr) { + return {SkTo(borderW), SkTo(borderH)}; + } + if (dst->fImage == nullptr) { + dst->fBounds.setEmpty(); + return {0, 0}; + } + + int srcW = src.fBounds.width(), + srcH = src.fBounds.height(), + dstW = dst->fBounds.width(), + dstH = dst->fBounds.height(); + SkASSERT(srcW >= 0 && srcH >= 0 && dstW >= 0 && dstH >= 0); + + auto bufferSize = std::max(planW.bufferSize(), planH.bufferSize()); + auto buffer = alloc.makeArrayDefault(bufferSize); + + // Blur both directions. + int tmpW = srcH, + tmpH = dstW; + + // Make sure not to overflow the multiply for the tmp buffer size. + if (tmpH > std::numeric_limits::max() / tmpW) { + return {0, 0}; + } + auto tmp = alloc.makeArrayDefault(tmpW * tmpH); + + // Blur horizontally, and transpose. + const PlanGauss::Scan& scanW = planW.makeBlurScan(srcW, buffer); + switch (src.fFormat) { + case SkMask::kBW_Format: { + const uint8_t* bwStart = src.fImage; + auto start = SkMask::AlphaIter(bwStart, 0); + auto end = SkMask::AlphaIter(bwStart + (srcW / 8), srcW % 8); + for (int y = 0; y < srcH; ++y, start >>= src.fRowBytes, end >>= src.fRowBytes) { + auto tmpStart = &tmp[y]; + scanW.blur(start, end, tmpStart, tmpW, tmpStart + tmpW * tmpH); + } + } break; + case SkMask::kA8_Format: { + const uint8_t* a8Start = src.fImage; + auto start = SkMask::AlphaIter(a8Start); + auto end = SkMask::AlphaIter(a8Start + srcW); + for (int y = 0; y < srcH; ++y, start >>= src.fRowBytes, end >>= src.fRowBytes) { + auto tmpStart = &tmp[y]; + scanW.blur(start, end, tmpStart, tmpW, tmpStart + tmpW * tmpH); + } + } break; + case SkMask::kARGB32_Format: { + const uint32_t* argbStart = reinterpret_cast(src.fImage); + auto start = SkMask::AlphaIter(argbStart); + auto end = SkMask::AlphaIter(argbStart + srcW); + for (int y = 0; y < srcH; ++y, start >>= src.fRowBytes, end >>= src.fRowBytes) { + auto tmpStart = &tmp[y]; + scanW.blur(start, end, tmpStart, tmpW, tmpStart + tmpW * tmpH); + } + } break; + case SkMask::kLCD16_Format: { + const uint16_t* lcdStart = reinterpret_cast(src.fImage); + auto start = SkMask::AlphaIter(lcdStart); + auto end = SkMask::AlphaIter(lcdStart + srcW); + for (int y = 0; y < srcH; ++y, start >>= src.fRowBytes, end >>= src.fRowBytes) { + auto tmpStart = &tmp[y]; + scanW.blur(start, end, tmpStart, tmpW, tmpStart + tmpW * tmpH); + } + } break; + default: + SK_ABORT("Unhandled format."); + } + + // Blur vertically (scan in memory order because of the transposition), + // and transpose back to the original orientation. + const PlanGauss::Scan& scanH = planH.makeBlurScan(tmpW, buffer); + for (int y = 0; y < tmpH; y++) { + auto tmpStart = &tmp[y * tmpW]; + auto dstStart = &dst->fImage[y]; + + scanH.blur(tmpStart, tmpStart + tmpW, + dstStart, dst->fRowBytes, dstStart + dst->fRowBytes * dstH); + } + + return {SkTo(borderW), SkTo(borderH)}; +} diff --git a/gfx/skia/skia/src/core/SkMaskBlurFilter.h b/gfx/skia/skia/src/core/SkMaskBlurFilter.h new file mode 100644 index 0000000000..fe10cf4abb --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskBlurFilter.h @@ -0,0 +1,37 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMaskBlurFilter_DEFINED +#define SkMaskBlurFilter_DEFINED + +#include +#include +#include + +#include "include/core/SkTypes.h" +#include "src/core/SkMask.h" + +// Implement a single channel Gaussian blur. The specifics for implementation are taken from: +// https://drafts.fxtf.org/filters/#feGaussianBlurElement +class SkMaskBlurFilter { +public: + // Create an object suitable for filtering an SkMask using a filter with width sigmaW and + // height sigmaH. + SkMaskBlurFilter(double sigmaW, double sigmaH); + + // returns true iff the sigmas will result in an identity mask (no blurring) + bool hasNoBlur() const; + + // Given a src SkMask, generate dst SkMask returning the border width and height. + SkIPoint blur(const SkMask& src, SkMask* dst) const; + +private: + const double fSigmaW; + const double fSigmaH; +}; + +#endif // SkBlurMaskFilter_DEFINED diff --git a/gfx/skia/skia/src/core/SkMaskCache.cpp b/gfx/skia/skia/src/core/SkMaskCache.cpp new file mode 100644 index 0000000000..f08f4d7ee0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskCache.cpp @@ -0,0 +1,185 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkMaskCache.h" + +#define CHECK_LOCAL(localCache, localName, globalName, ...) \ + ((localCache) ? localCache->localName(__VA_ARGS__) : SkResourceCache::globalName(__VA_ARGS__)) + +struct MaskValue { + SkMask fMask; + SkCachedData* fData; +}; + +namespace { +static unsigned gRRectBlurKeyNamespaceLabel; + +struct RRectBlurKey : public SkResourceCache::Key { +public: + RRectBlurKey(SkScalar sigma, const SkRRect& rrect, SkBlurStyle style) + : fSigma(sigma) + , fStyle(style) + , fRRect(rrect) + { + this->init(&gRRectBlurKeyNamespaceLabel, 0, + sizeof(fSigma) + sizeof(fStyle) + sizeof(fRRect)); + } + + SkScalar fSigma; + int32_t fStyle; + SkRRect fRRect; +}; + +struct RRectBlurRec : public SkResourceCache::Rec { + RRectBlurRec(RRectBlurKey key, const SkMask& mask, SkCachedData* data) + : fKey(key) + { + fValue.fMask = mask; + fValue.fData = data; + fValue.fData->attachToCacheAndRef(); + } + ~RRectBlurRec() override { + fValue.fData->detachFromCacheAndUnref(); + } + + RRectBlurKey fKey; + MaskValue fValue; + + const Key& getKey() const override { return fKey; } + size_t bytesUsed() const override { return sizeof(*this) + fValue.fData->size(); } + const char* getCategory() const override { return "rrect-blur"; } + SkDiscardableMemory* diagnostic_only_getDiscardable() const override { + return fValue.fData->diagnostic_only_getDiscardable(); + } + + static bool Visitor(const SkResourceCache::Rec& baseRec, void* contextData) { + const RRectBlurRec& rec = static_cast(baseRec); + MaskValue* result = (MaskValue*)contextData; + + SkCachedData* tmpData = rec.fValue.fData; + tmpData->ref(); + if (nullptr == tmpData->data()) { + tmpData->unref(); + return false; + } + *result = rec.fValue; + return true; + } +}; +} // namespace + +SkCachedData* SkMaskCache::FindAndRef(SkScalar sigma, SkBlurStyle style, + const SkRRect& rrect, SkMask* mask, SkResourceCache* localCache) { + MaskValue result; + RRectBlurKey key(sigma, rrect, style); + if (!CHECK_LOCAL(localCache, find, Find, key, RRectBlurRec::Visitor, &result)) { + return nullptr; + } + + *mask = result.fMask; + mask->fImage = (uint8_t*)(result.fData->data()); + return result.fData; +} + +void SkMaskCache::Add(SkScalar sigma, SkBlurStyle style, + const SkRRect& rrect, const SkMask& mask, SkCachedData* data, + SkResourceCache* localCache) { + RRectBlurKey key(sigma, rrect, style); + return CHECK_LOCAL(localCache, add, Add, new RRectBlurRec(key, mask, data)); +} + +////////////////////////////////////////////////////////////////////////////////////////// + +namespace { +static unsigned gRectsBlurKeyNamespaceLabel; + +struct RectsBlurKey : public SkResourceCache::Key { +public: + RectsBlurKey(SkScalar sigma, SkBlurStyle style, const SkRect rects[], int count) + : fSigma(sigma) + , fStyle(style) + { + SkASSERT(1 == count || 2 == count); + SkIRect ir; + rects[0].roundOut(&ir); + fSizes[0] = SkSize{rects[0].width(), rects[0].height()}; + if (2 == count) { + fSizes[1] = SkSize{rects[1].width(), rects[1].height()}; + fSizes[2] = SkSize{rects[0].x() - rects[1].x(), rects[0].y() - rects[1].y()}; + } else { + fSizes[1] = SkSize{0, 0}; + fSizes[2] = SkSize{0, 0}; + } + fSizes[3] = SkSize{rects[0].x() - ir.x(), rects[0].y() - ir.y()}; + + this->init(&gRectsBlurKeyNamespaceLabel, 0, + sizeof(fSigma) + sizeof(fStyle) + sizeof(fSizes)); + } + + SkScalar fSigma; + int32_t fStyle; + SkSize fSizes[4]; +}; + +struct RectsBlurRec : public SkResourceCache::Rec { + RectsBlurRec(RectsBlurKey key, const SkMask& mask, SkCachedData* data) + : fKey(key) + { + fValue.fMask = mask; + fValue.fData = data; + fValue.fData->attachToCacheAndRef(); + } + ~RectsBlurRec() override { + fValue.fData->detachFromCacheAndUnref(); + } + + RectsBlurKey fKey; + MaskValue fValue; + + const Key& getKey() const override { return fKey; } + size_t bytesUsed() const override { return sizeof(*this) + fValue.fData->size(); } + const char* getCategory() const override { return "rects-blur"; } + SkDiscardableMemory* diagnostic_only_getDiscardable() const override { + return fValue.fData->diagnostic_only_getDiscardable(); + } + + static bool Visitor(const SkResourceCache::Rec& baseRec, void* contextData) { + const RectsBlurRec& rec = static_cast(baseRec); + MaskValue* result = static_cast(contextData); + + SkCachedData* tmpData = rec.fValue.fData; + tmpData->ref(); + if (nullptr == tmpData->data()) { + tmpData->unref(); + return false; + } + *result = rec.fValue; + return true; + } +}; +} // namespace + +SkCachedData* SkMaskCache::FindAndRef(SkScalar sigma, SkBlurStyle style, + const SkRect rects[], int count, SkMask* mask, + SkResourceCache* localCache) { + MaskValue result; + RectsBlurKey key(sigma, style, rects, count); + if (!CHECK_LOCAL(localCache, find, Find, key, RectsBlurRec::Visitor, &result)) { + return nullptr; + } + + *mask = result.fMask; + mask->fImage = (uint8_t*)(result.fData->data()); + return result.fData; +} + +void SkMaskCache::Add(SkScalar sigma, SkBlurStyle style, + const SkRect rects[], int count, const SkMask& mask, SkCachedData* data, + SkResourceCache* localCache) { + RectsBlurKey key(sigma, style, rects, count); + return CHECK_LOCAL(localCache, add, Add, new RectsBlurRec(key, mask, data)); +} diff --git a/gfx/skia/skia/src/core/SkMaskCache.h b/gfx/skia/skia/src/core/SkMaskCache.h new file mode 100644 index 0000000000..d22a5d1be0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskCache.h @@ -0,0 +1,44 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMaskCache_DEFINED +#define SkMaskCache_DEFINED + +#include "include/core/SkBlurTypes.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRect.h" +#include "src/core/SkCachedData.h" +#include "src/core/SkMask.h" +#include "src/core/SkResourceCache.h" + +class SkMaskCache { +public: + /** + * On success, return a ref to the SkCachedData that holds the pixels, and have mask + * already point to that memory. + * + * On failure, return nullptr. + */ + static SkCachedData* FindAndRef(SkScalar sigma, SkBlurStyle style, + const SkRRect& rrect, SkMask* mask, + SkResourceCache* localCache = nullptr); + static SkCachedData* FindAndRef(SkScalar sigma, SkBlurStyle style, + const SkRect rects[], int count, SkMask* mask, + SkResourceCache* localCache = nullptr); + + /** + * Add a mask and its pixel-data to the cache. + */ + static void Add(SkScalar sigma, SkBlurStyle style, + const SkRRect& rrect, const SkMask& mask, SkCachedData* data, + SkResourceCache* localCache = nullptr); + static void Add(SkScalar sigma, SkBlurStyle style, + const SkRect rects[], int count, const SkMask& mask, SkCachedData* data, + SkResourceCache* localCache = nullptr); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkMaskFilter.cpp b/gfx/skia/skia/src/core/SkMaskFilter.cpp new file mode 100644 index 0000000000..9cae59f5b6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskFilter.cpp @@ -0,0 +1,414 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkMaskFilter.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkRegion.h" +#include "include/core/SkStrokeRec.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkAutoMalloc.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkCachedData.h" +#include "src/core/SkDraw.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkRasterClip.h" + +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/private/base/SkTo.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" + +class GrClip; +class GrRecordingContext; +class GrStyledShape; +enum class GrColorType; +struct GrFPArgs; +namespace skgpu { +namespace ganesh { +class SurfaceDrawContext; +} +} // namespace skgpu +#endif +#if defined(SK_GANESH) || defined(SK_GRAPHITE) +#include "src/text/gpu/SDFMaskFilter.h" +#endif + +class SkRRect; +enum SkAlphaType : int; +struct SkDeserialProcs; + +SkMaskFilterBase::NinePatch::~NinePatch() { + if (fCache) { + SkASSERT((const void*)fMask.fImage == fCache->data()); + fCache->unref(); + } else { + SkMask::FreeImage(fMask.fImage); + } +} + +bool SkMaskFilterBase::asABlur(BlurRec*) const { + return false; +} + +static void extractMaskSubset(const SkMask& src, SkMask* dst) { + SkASSERT(src.fBounds.contains(dst->fBounds)); + + const int dx = dst->fBounds.left() - src.fBounds.left(); + const int dy = dst->fBounds.top() - src.fBounds.top(); + dst->fImage = src.fImage + dy * src.fRowBytes + dx; + dst->fRowBytes = src.fRowBytes; + dst->fFormat = src.fFormat; +} + +static void blitClippedMask(SkBlitter* blitter, const SkMask& mask, + const SkIRect& bounds, const SkIRect& clipR) { + SkIRect r; + if (r.intersect(bounds, clipR)) { + blitter->blitMask(mask, r); + } +} + +static void blitClippedRect(SkBlitter* blitter, const SkIRect& rect, const SkIRect& clipR) { + SkIRect r; + if (r.intersect(rect, clipR)) { + blitter->blitRect(r.left(), r.top(), r.width(), r.height()); + } +} + +#if 0 +static void dump(const SkMask& mask) { + for (int y = mask.fBounds.top(); y < mask.fBounds.bottom(); ++y) { + for (int x = mask.fBounds.left(); x < mask.fBounds.right(); ++x) { + SkDebugf("%02X", *mask.getAddr8(x, y)); + } + SkDebugf("\n"); + } + SkDebugf("\n"); +} +#endif + +static void draw_nine_clipped(const SkMask& mask, const SkIRect& outerR, + const SkIPoint& center, bool fillCenter, + const SkIRect& clipR, SkBlitter* blitter) { + int cx = center.x(); + int cy = center.y(); + SkMask m; + + // top-left + m.fBounds = mask.fBounds; + m.fBounds.fRight = cx; + m.fBounds.fBottom = cy; + if (m.fBounds.width() > 0 && m.fBounds.height() > 0) { + extractMaskSubset(mask, &m); + m.fBounds.offsetTo(outerR.left(), outerR.top()); + blitClippedMask(blitter, m, m.fBounds, clipR); + } + + // top-right + m.fBounds = mask.fBounds; + m.fBounds.fLeft = cx + 1; + m.fBounds.fBottom = cy; + if (m.fBounds.width() > 0 && m.fBounds.height() > 0) { + extractMaskSubset(mask, &m); + m.fBounds.offsetTo(outerR.right() - m.fBounds.width(), outerR.top()); + blitClippedMask(blitter, m, m.fBounds, clipR); + } + + // bottom-left + m.fBounds = mask.fBounds; + m.fBounds.fRight = cx; + m.fBounds.fTop = cy + 1; + if (m.fBounds.width() > 0 && m.fBounds.height() > 0) { + extractMaskSubset(mask, &m); + m.fBounds.offsetTo(outerR.left(), outerR.bottom() - m.fBounds.height()); + blitClippedMask(blitter, m, m.fBounds, clipR); + } + + // bottom-right + m.fBounds = mask.fBounds; + m.fBounds.fLeft = cx + 1; + m.fBounds.fTop = cy + 1; + if (m.fBounds.width() > 0 && m.fBounds.height() > 0) { + extractMaskSubset(mask, &m); + m.fBounds.offsetTo(outerR.right() - m.fBounds.width(), + outerR.bottom() - m.fBounds.height()); + blitClippedMask(blitter, m, m.fBounds, clipR); + } + + SkIRect innerR; + innerR.setLTRB(outerR.left() + cx - mask.fBounds.left(), + outerR.top() + cy - mask.fBounds.top(), + outerR.right() + (cx + 1 - mask.fBounds.right()), + outerR.bottom() + (cy + 1 - mask.fBounds.bottom())); + if (fillCenter) { + blitClippedRect(blitter, innerR, clipR); + } + + const int innerW = innerR.width(); + size_t storageSize = (innerW + 1) * (sizeof(int16_t) + sizeof(uint8_t)); + SkAutoSMalloc<4*1024> storage(storageSize); + int16_t* runs = (int16_t*)storage.get(); + uint8_t* alpha = (uint8_t*)(runs + innerW + 1); + + SkIRect r; + // top + r.setLTRB(innerR.left(), outerR.top(), innerR.right(), innerR.top()); + if (r.intersect(clipR)) { + int startY = std::max(0, r.top() - outerR.top()); + int stopY = startY + r.height(); + int width = r.width(); + for (int y = startY; y < stopY; ++y) { + runs[0] = width; + runs[width] = 0; + alpha[0] = *mask.getAddr8(cx, mask.fBounds.top() + y); + blitter->blitAntiH(r.left(), outerR.top() + y, alpha, runs); + } + } + // bottom + r.setLTRB(innerR.left(), innerR.bottom(), innerR.right(), outerR.bottom()); + if (r.intersect(clipR)) { + int startY = outerR.bottom() - r.bottom(); + int stopY = startY + r.height(); + int width = r.width(); + for (int y = startY; y < stopY; ++y) { + runs[0] = width; + runs[width] = 0; + alpha[0] = *mask.getAddr8(cx, mask.fBounds.bottom() - y - 1); + blitter->blitAntiH(r.left(), outerR.bottom() - y - 1, alpha, runs); + } + } + // left + r.setLTRB(outerR.left(), innerR.top(), innerR.left(), innerR.bottom()); + if (r.intersect(clipR)) { + SkMask leftMask; + leftMask.fImage = mask.getAddr8(mask.fBounds.left() + r.left() - outerR.left(), + mask.fBounds.top() + cy); + leftMask.fBounds = r; + leftMask.fRowBytes = 0; // so we repeat the scanline for our height + leftMask.fFormat = SkMask::kA8_Format; + blitter->blitMask(leftMask, r); + } + // right + r.setLTRB(innerR.right(), innerR.top(), outerR.right(), innerR.bottom()); + if (r.intersect(clipR)) { + SkMask rightMask; + rightMask.fImage = mask.getAddr8(mask.fBounds.right() - outerR.right() + r.left(), + mask.fBounds.top() + cy); + rightMask.fBounds = r; + rightMask.fRowBytes = 0; // so we repeat the scanline for our height + rightMask.fFormat = SkMask::kA8_Format; + blitter->blitMask(rightMask, r); + } +} + +static void draw_nine(const SkMask& mask, const SkIRect& outerR, const SkIPoint& center, + bool fillCenter, const SkRasterClip& clip, SkBlitter* blitter) { + // if we get here, we need to (possibly) resolve the clip and blitter + SkAAClipBlitterWrapper wrapper(clip, blitter); + blitter = wrapper.getBlitter(); + + SkRegion::Cliperator clipper(wrapper.getRgn(), outerR); + + if (!clipper.done()) { + const SkIRect& cr = clipper.rect(); + do { + draw_nine_clipped(mask, outerR, center, fillCenter, cr, blitter); + clipper.next(); + } while (!clipper.done()); + } +} + +static int countNestedRects(const SkPath& path, SkRect rects[2]) { + if (SkPathPriv::IsNestedFillRects(path, rects)) { + return 2; + } + return path.isRect(&rects[0]); +} + +bool SkMaskFilterBase::filterRRect(const SkRRect& devRRect, const SkMatrix& matrix, + const SkRasterClip& clip, SkBlitter* blitter) const { + // Attempt to speed up drawing by creating a nine patch. If a nine patch + // cannot be used, return false to allow our caller to recover and perform + // the drawing another way. + NinePatch patch; + patch.fMask.fImage = nullptr; + if (kTrue_FilterReturn != this->filterRRectToNine(devRRect, matrix, + clip.getBounds(), + &patch)) { + SkASSERT(nullptr == patch.fMask.fImage); + return false; + } + draw_nine(patch.fMask, patch.fOuterRect, patch.fCenter, true, clip, blitter); + return true; +} + +bool SkMaskFilterBase::filterPath(const SkPath& devPath, const SkMatrix& matrix, + const SkRasterClip& clip, SkBlitter* blitter, + SkStrokeRec::InitStyle style) const { + SkRect rects[2]; + int rectCount = 0; + if (SkStrokeRec::kFill_InitStyle == style) { + rectCount = countNestedRects(devPath, rects); + } + if (rectCount > 0) { + NinePatch patch; + + switch (this->filterRectsToNine(rects, rectCount, matrix, clip.getBounds(), &patch)) { + case kFalse_FilterReturn: + SkASSERT(nullptr == patch.fMask.fImage); + return false; + + case kTrue_FilterReturn: + draw_nine(patch.fMask, patch.fOuterRect, patch.fCenter, 1 == rectCount, clip, + blitter); + return true; + + case kUnimplemented_FilterReturn: + SkASSERT(nullptr == patch.fMask.fImage); + // fall out + break; + } + } + + SkMask srcM, dstM; + +#if defined(SK_BUILD_FOR_FUZZER) + if (devPath.countVerbs() > 1000 || devPath.countPoints() > 1000) { + return false; + } +#endif + if (!SkDraw::DrawToMask(devPath, clip.getBounds(), this, &matrix, &srcM, + SkMask::kComputeBoundsAndRenderImage_CreateMode, + style)) { + return false; + } + SkAutoMaskFreeImage autoSrc(srcM.fImage); + + if (!this->filterMask(&dstM, srcM, matrix, nullptr)) { + return false; + } + SkAutoMaskFreeImage autoDst(dstM.fImage); + + // if we get here, we need to (possibly) resolve the clip and blitter + SkAAClipBlitterWrapper wrapper(clip, blitter); + blitter = wrapper.getBlitter(); + + SkRegion::Cliperator clipper(wrapper.getRgn(), dstM.fBounds); + + if (!clipper.done()) { + const SkIRect& cr = clipper.rect(); + do { + blitter->blitMask(dstM, cr); + clipper.next(); + } while (!clipper.done()); + } + + return true; +} + +SkMaskFilterBase::FilterReturn +SkMaskFilterBase::filterRRectToNine(const SkRRect&, const SkMatrix&, + const SkIRect& clipBounds, NinePatch*) const { + return kUnimplemented_FilterReturn; +} + +SkMaskFilterBase::FilterReturn +SkMaskFilterBase::filterRectsToNine(const SkRect[], int count, const SkMatrix&, + const SkIRect& clipBounds, NinePatch*) const { + return kUnimplemented_FilterReturn; +} + +#if defined(SK_GANESH) +std::unique_ptr +SkMaskFilterBase::asFragmentProcessor(const GrFPArgs& args, const SkMatrix& ctm) const { + auto fp = this->onAsFragmentProcessor(args, MatrixRec(ctm)); + SkASSERT(SkToBool(fp) == this->hasFragmentProcessor()); + return fp; +} +bool SkMaskFilterBase::hasFragmentProcessor() const { + return this->onHasFragmentProcessor(); +} + +std::unique_ptr +SkMaskFilterBase::onAsFragmentProcessor(const GrFPArgs&, const MatrixRec&) const { + return nullptr; +} +bool SkMaskFilterBase::onHasFragmentProcessor() const { return false; } + +bool SkMaskFilterBase::canFilterMaskGPU(const GrStyledShape& shape, + const SkIRect& devSpaceShapeBounds, + const SkIRect& clipBounds, + const SkMatrix& ctm, + SkIRect* maskRect) const { + return false; +} + +bool SkMaskFilterBase::directFilterMaskGPU(GrRecordingContext*, + skgpu::ganesh::SurfaceDrawContext*, + GrPaint&&, + const GrClip*, + const SkMatrix& viewMatrix, + const GrStyledShape&) const { + return false; +} + +GrSurfaceProxyView SkMaskFilterBase::filterMaskGPU(GrRecordingContext*, + GrSurfaceProxyView view, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + const SkMatrix& ctm, + const SkIRect& maskRect) const { + return {}; +} +#endif + +void SkMaskFilterBase::computeFastBounds(const SkRect& src, SkRect* dst) const { + SkMask srcM, dstM; + + srcM.fBounds = src.roundOut(); + srcM.fRowBytes = 0; + srcM.fFormat = SkMask::kA8_Format; + + SkIPoint margin; // ignored + if (this->filterMask(&dstM, srcM, SkMatrix::I(), &margin)) { + dst->set(dstM.fBounds); + } else { + dst->set(srcM.fBounds); + } +} + +SkRect SkMaskFilter::approximateFilteredBounds(const SkRect& src) const { + SkRect dst; + as_MFB(this)->computeFastBounds(src, &dst); + return dst; +} + +void SkMaskFilter::RegisterFlattenables() { + sk_register_blur_maskfilter_createproc(); +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) && !defined(SK_DISABLE_SDF_TEXT) + sktext::gpu::register_sdf_maskfilter_createproc(); +#endif +} + +sk_sp SkMaskFilter::Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs) { + return sk_sp(static_cast( + SkFlattenable::Deserialize( + kSkMaskFilter_Type, data, size, procs).release())); +} diff --git a/gfx/skia/skia/src/core/SkMaskFilterBase.h b/gfx/skia/skia/src/core/SkMaskFilterBase.h new file mode 100644 index 0000000000..b48e377617 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskFilterBase.h @@ -0,0 +1,266 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMaskFilterBase_DEFINED +#define SkMaskFilterBase_DEFINED + +#include "include/core/SkBlurTypes.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPaint.h" +#include "include/core/SkStrokeRec.h" +#include "include/private/base/SkNoncopyable.h" +#include "src/core/SkMask.h" + +#if defined(SK_GANESH) +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/shaders/SkShaderBase.h" +#endif + +class GrClip; +struct GrFPArgs; +class GrFragmentProcessor; +class GrPaint; +class GrRecordingContext; +class GrRenderTarget; +namespace skgpu { +namespace ganesh { +class SurfaceDrawContext; +} +} // namespace skgpu +class GrResourceProvider; +class GrStyledShape; +class GrSurfaceProxyView; +class GrTexture; +class GrTextureProxy; + +class SkBitmap; +class SkBlitter; +class SkCachedData; +class SkMatrix; +class SkPath; +class SkRasterClip; +class SkRRect; + +class SkMaskFilterBase : public SkMaskFilter { +public: + /** Returns the format of the resulting mask that this subclass will return + when its filterMask() method is called. + */ + virtual SkMask::Format getFormat() const = 0; + + /** Create a new mask by filter the src mask. + If src.fImage == null, then do not allocate or create the dst image + but do fill out the other fields in dstMask. + If you do allocate a dst image, use SkMask::AllocImage() + If this returns false, dst mask is ignored. + @param dst the result of the filter. If src.fImage == null, dst should not allocate its image + @param src the original image to be filtered. + @param matrix the CTM + @param margin if not null, return the buffer dx/dy need when calculating the effect. Used when + drawing a clipped object to know how much larger to allocate the src before + applying the filter. If returning false, ignore this parameter. + @return true if the dst mask was correctly created. + */ + virtual bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&, + SkIPoint* margin) const = 0; + +#if defined(SK_GANESH) + /** + * Returns a processor if the filter can be expressed a single-pass GrProcessor without + * requiring an explicit input mask. Per-pixel, the effect receives the incoming mask's + * coverage as the input color and outputs the filtered covereage value. This means that each + * pixel's filtered coverage must only depend on the unfiltered mask value for that pixel and + * not on surrounding values. + */ + std::unique_ptr asFragmentProcessor(const GrFPArgs& args, + const SkMatrix& ctm) const; + + /** + * Returns true iff asFragmentProcessor() will return a processor + */ + bool hasFragmentProcessor() const; + + /** + * If asFragmentProcessor() fails the filter may be implemented on the GPU by a subclass + * overriding filterMaskGPU (declared below). That code path requires constructing a + * src mask as input. Since that is a potentially expensive operation, the subclass must also + * override this function to indicate whether filterTextureMaskGPU would succeeed if the mask + * were to be created. + * + * 'maskRect' returns the device space portion of the mask that the filter needs. The mask + * passed into 'filterMaskGPU' should have the same extent as 'maskRect' but be + * translated to the upper-left corner of the mask (i.e., (maskRect.fLeft, maskRect.fTop) + * appears at (0, 0) in the mask). + * + * Logically, how this works is: + * canFilterMaskGPU is called + * if (it returns true) + * the returned mask rect is used for quick rejecting + * the mask rect is used to generate the mask + * filterMaskGPU is called to filter the mask + * + * TODO: this should work as: + * if (canFilterMaskGPU(devShape, ...)) // rect, rrect, drrect, path + * filterMaskGPU(devShape, ...) + * this would hide the RRect special case and the mask generation + */ + virtual bool canFilterMaskGPU(const GrStyledShape&, + const SkIRect& devSpaceShapeBounds, + const SkIRect& clipBounds, + const SkMatrix& ctm, + SkIRect* maskRect) const; + + /** + * Try to directly render the mask filter into the target. Returns true if drawing was + * successful. If false is returned then paint is unmodified. + */ + virtual bool directFilterMaskGPU(GrRecordingContext*, + skgpu::ganesh::SurfaceDrawContext*, + GrPaint&& paint, + const GrClip*, + const SkMatrix& viewMatrix, + const GrStyledShape& shape) const; + + /** + * This function is used to implement filters that require an explicit src mask. It should only + * be called if canFilterMaskGPU returned true and the maskRect param should be the output from + * that call. + * Implementations are free to get the GrContext from the src texture in order to create + * additional textures and perform multiple passes. + */ + virtual GrSurfaceProxyView filterMaskGPU(GrRecordingContext*, + GrSurfaceProxyView srcView, + GrColorType srcColorType, + SkAlphaType srcAlphaType, + const SkMatrix& ctm, + const SkIRect& maskRect) const; +#endif + + /** + * The fast bounds function is used to enable the paint to be culled early + * in the drawing pipeline. This function accepts the current bounds of the + * paint as its src param and the filter adjust those bounds using its + * current mask and returns the result using the dest param. Callers are + * allowed to provide the same struct for both src and dest so each + * implementation must accommodate that behavior. + * + * The default impl calls filterMask with the src mask having no image, + * but subclasses may override this if they can compute the rect faster. + */ + virtual void computeFastBounds(const SkRect& src, SkRect* dest) const; + + struct BlurRec { + SkScalar fSigma; + SkBlurStyle fStyle; + }; + /** + * If this filter can be represented by a BlurRec, return true and (if not null) fill in the + * provided BlurRec parameter. If this effect cannot be represented as a BlurRec, return false + * and ignore the BlurRec parameter. + */ + virtual bool asABlur(BlurRec*) const; + + static SkFlattenable::Type GetFlattenableType() { + return kSkMaskFilter_Type; + } + + SkFlattenable::Type getFlattenableType() const override { + return kSkMaskFilter_Type; + } + +protected: + SkMaskFilterBase() {} + +#if defined(SK_GANESH) + using MatrixRec = SkShaderBase::MatrixRec; + virtual std::unique_ptr onAsFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const; + virtual bool onHasFragmentProcessor() const; +#endif + + enum FilterReturn { + kFalse_FilterReturn, + kTrue_FilterReturn, + kUnimplemented_FilterReturn + }; + + class NinePatch : ::SkNoncopyable { + public: + NinePatch() : fCache(nullptr) { } + ~NinePatch(); + + SkMask fMask; // fBounds must have [0,0] in its top-left + SkIRect fOuterRect; // width/height must be >= fMask.fBounds' + SkIPoint fCenter; // identifies center row/col for stretching + SkCachedData* fCache; + }; + + /** + * Override if your subclass can filter a rect, and return the answer as + * a ninepatch mask to be stretched over the returned outerRect. On success + * return kTrue_FilterReturn. On failure (e.g. out of memory) return + * kFalse_FilterReturn. If the normal filterMask() entry-point should be + * called (the default) return kUnimplemented_FilterReturn. + * + * By convention, the caller will take the center rol/col from the returned + * mask as the slice it can replicate horizontally and vertically as we + * stretch the mask to fit inside outerRect. It is an error for outerRect + * to be smaller than the mask's bounds. This would imply that the width + * and height of the mask should be odd. This is not required, just that + * the caller will call mask.fBounds.centerX() and centerY() to find the + * strips that will be replicated. + */ + virtual FilterReturn filterRectsToNine(const SkRect[], int count, + const SkMatrix&, + const SkIRect& clipBounds, + NinePatch*) const; + /** + * Similar to filterRectsToNine, except it performs the work on a round rect. + */ + virtual FilterReturn filterRRectToNine(const SkRRect&, const SkMatrix&, + const SkIRect& clipBounds, + NinePatch*) const; + +private: + friend class SkDraw; + friend class SkDrawBase; + + /** Helper method that, given a path in device space, will rasterize it into a kA8_Format mask + and then call filterMask(). If this returns true, the specified blitter will be called + to render that mask. Returns false if filterMask() returned false. + This method is not exported to java. + */ + bool filterPath(const SkPath& devPath, const SkMatrix& ctm, const SkRasterClip&, SkBlitter*, + SkStrokeRec::InitStyle) const; + + /** Helper method that, given a roundRect in device space, will rasterize it into a kA8_Format + mask and then call filterMask(). If this returns true, the specified blitter will be called + to render that mask. Returns false if filterMask() returned false. + */ + bool filterRRect(const SkRRect& devRRect, const SkMatrix& ctm, const SkRasterClip&, + SkBlitter*) const; + + using INHERITED = SkFlattenable; +}; + +inline SkMaskFilterBase* as_MFB(SkMaskFilter* mf) { + return static_cast(mf); +} + +inline const SkMaskFilterBase* as_MFB(const SkMaskFilter* mf) { + return static_cast(mf); +} + +inline const SkMaskFilterBase* as_MFB(const sk_sp& mf) { + return static_cast(mf.get()); +} + +// For RegisterFlattenables access to the blur mask filter implementation +extern void sk_register_blur_maskfilter_createproc(); + +#endif diff --git a/gfx/skia/skia/src/core/SkMaskGamma.cpp b/gfx/skia/skia/src/core/SkMaskGamma.cpp new file mode 100644 index 0000000000..5c82c5e7a8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskGamma.cpp @@ -0,0 +1,125 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkMaskGamma.h" + +#include "include/core/SkColor.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTo.h" + +class SkLinearColorSpaceLuminance : public SkColorSpaceLuminance { + SkScalar toLuma(SkScalar SkDEBUGCODE(gamma), SkScalar luminance) const override { + SkASSERT(SK_Scalar1 == gamma); + return luminance; + } + SkScalar fromLuma(SkScalar SkDEBUGCODE(gamma), SkScalar luma) const override { + SkASSERT(SK_Scalar1 == gamma); + return luma; + } +}; + +class SkGammaColorSpaceLuminance : public SkColorSpaceLuminance { + SkScalar toLuma(SkScalar gamma, SkScalar luminance) const override { + return SkScalarPow(luminance, gamma); + } + SkScalar fromLuma(SkScalar gamma, SkScalar luma) const override { + return SkScalarPow(luma, SkScalarInvert(gamma)); + } +}; + +class SkSRGBColorSpaceLuminance : public SkColorSpaceLuminance { + SkScalar toLuma(SkScalar SkDEBUGCODE(gamma), SkScalar luminance) const override { + SkASSERT(0 == gamma); + //The magic numbers are derived from the sRGB specification. + //See http://www.color.org/chardata/rgb/srgb.xalter . + if (luminance <= 0.04045f) { + return luminance / 12.92f; + } + return SkScalarPow((luminance + 0.055f) / 1.055f, + 2.4f); + } + SkScalar fromLuma(SkScalar SkDEBUGCODE(gamma), SkScalar luma) const override { + SkASSERT(0 == gamma); + //The magic numbers are derived from the sRGB specification. + //See http://www.color.org/chardata/rgb/srgb.xalter . + if (luma <= 0.0031308f) { + return luma * 12.92f; + } + return 1.055f * SkScalarPow(luma, SkScalarInvert(2.4f)) + - 0.055f; + } +}; + +/*static*/ const SkColorSpaceLuminance& SkColorSpaceLuminance::Fetch(SkScalar gamma) { + static SkLinearColorSpaceLuminance gSkLinearColorSpaceLuminance; + static SkGammaColorSpaceLuminance gSkGammaColorSpaceLuminance; + static SkSRGBColorSpaceLuminance gSkSRGBColorSpaceLuminance; + + if (0 == gamma) { + return gSkSRGBColorSpaceLuminance; + } else if (SK_Scalar1 == gamma) { + return gSkLinearColorSpaceLuminance; + } else { + return gSkGammaColorSpaceLuminance; + } +} + +static float apply_contrast(float srca, float contrast) { + return srca + ((1.0f - srca) * contrast * srca); +} + +void SkTMaskGamma_build_correcting_lut(uint8_t table[256], U8CPU srcI, SkScalar contrast, + const SkColorSpaceLuminance& srcConvert, SkScalar srcGamma, + const SkColorSpaceLuminance& dstConvert, SkScalar dstGamma) { + const float src = (float)srcI / 255.0f; + const float linSrc = srcConvert.toLuma(srcGamma, src); + //Guess at the dst. The perceptual inverse provides smaller visual + //discontinuities when slight changes to desaturated colors cause a channel + //to map to a different correcting lut with neighboring srcI. + //See https://code.google.com/p/chromium/issues/detail?id=141425#c59 . + const float dst = 1.0f - src; + const float linDst = dstConvert.toLuma(dstGamma, dst); + + //Contrast value tapers off to 0 as the src luminance becomes white + const float adjustedContrast = SkScalarToFloat(contrast) * linDst; + + //Remove discontinuity and instability when src is close to dst. + //The value 1/256 is arbitrary and appears to contain the instability. + if (fabs(src - dst) < (1.0f / 256.0f)) { + float ii = 0.0f; + for (int i = 0; i < 256; ++i, ii += 1.0f) { + float rawSrca = ii / 255.0f; + float srca = apply_contrast(rawSrca, adjustedContrast); + table[i] = SkToU8(sk_float_round2int(255.0f * srca)); + } + } else { + // Avoid slow int to float conversion. + float ii = 0.0f; + for (int i = 0; i < 256; ++i, ii += 1.0f) { + // 'rawSrca += 1.0f / 255.0f' and even + // 'rawSrca = i * (1.0f / 255.0f)' can add up to more than 1.0f. + // When this happens the table[255] == 0x0 instead of 0xff. + // See http://code.google.com/p/chromium/issues/detail?id=146466 + float rawSrca = ii / 255.0f; + float srca = apply_contrast(rawSrca, adjustedContrast); + SkASSERT(srca <= 1.0f); + float dsta = 1.0f - srca; + + //Calculate the output we want. + float linOut = (linSrc * srca + dsta * linDst); + SkASSERT(linOut <= 1.0f); + float out = dstConvert.fromLuma(dstGamma, linOut); + + //Undo what the blit blend will do. + float result = (out - dst) / (src - dst); + SkASSERT(sk_float_round2int(255.0f * result) <= 255); + + table[i] = SkToU8(sk_float_round2int(255.0f * result)); + } + } +} diff --git a/gfx/skia/skia/src/core/SkMaskGamma.h b/gfx/skia/skia/src/core/SkMaskGamma.h new file mode 100644 index 0000000000..4d6acd786e --- /dev/null +++ b/gfx/skia/skia/src/core/SkMaskGamma.h @@ -0,0 +1,232 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMaskGamma_DEFINED +#define SkMaskGamma_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkNoncopyable.h" + +/** + * SkColorSpaceLuminance is used to convert luminances to and from linear and + * perceptual color spaces. + * + * Luma is used to specify a linear luminance value [0.0, 1.0]. + * Luminance is used to specify a luminance value in an arbitrary color space [0.0, 1.0]. + */ +class SkColorSpaceLuminance : SkNoncopyable { +public: + virtual ~SkColorSpaceLuminance() { } + + /** Converts a color component luminance in the color space to a linear luma. */ + virtual SkScalar toLuma(SkScalar gamma, SkScalar luminance) const = 0; + /** Converts a linear luma to a color component luminance in the color space. */ + virtual SkScalar fromLuma(SkScalar gamma, SkScalar luma) const = 0; + + /** Converts a color to a luminance value. */ + static U8CPU computeLuminance(SkScalar gamma, SkColor c) { + const SkColorSpaceLuminance& luminance = Fetch(gamma); + SkScalar r = luminance.toLuma(gamma, SkIntToScalar(SkColorGetR(c)) / 255); + SkScalar g = luminance.toLuma(gamma, SkIntToScalar(SkColorGetG(c)) / 255); + SkScalar b = luminance.toLuma(gamma, SkIntToScalar(SkColorGetB(c)) / 255); + SkScalar luma = r * SK_LUM_COEFF_R + + g * SK_LUM_COEFF_G + + b * SK_LUM_COEFF_B; + SkASSERT(luma <= SK_Scalar1); + return SkScalarRoundToInt(luminance.fromLuma(gamma, luma) * 255); + } + + /** Retrieves the SkColorSpaceLuminance for the given gamma. */ + static const SkColorSpaceLuminance& Fetch(SkScalar gamma); +}; + +///@{ +/** + * Scales base <= 2^N-1 to 2^8-1 + * @param N [1, 8] the number of bits used by base. + * @param base the number to be scaled to [0, 255]. + */ +template static inline U8CPU sk_t_scale255(U8CPU base) { + base <<= (8 - N); + U8CPU lum = base; + for (unsigned int i = N; i < 8; i += N) { + lum |= base >> i; + } + return lum; +} +template<> /*static*/ inline U8CPU sk_t_scale255<1>(U8CPU base) { + return base * 0xFF; +} +template<> /*static*/ inline U8CPU sk_t_scale255<2>(U8CPU base) { + return base * 0x55; +} +template<> /*static*/ inline U8CPU sk_t_scale255<4>(U8CPU base) { + return base * 0x11; +} +template<> /*static*/ inline U8CPU sk_t_scale255<8>(U8CPU base) { + return base; +} +///@} + +template class SkTMaskPreBlend; + +void SkTMaskGamma_build_correcting_lut(uint8_t table[256], U8CPU srcI, SkScalar contrast, + const SkColorSpaceLuminance& srcConvert, SkScalar srcGamma, + const SkColorSpaceLuminance& dstConvert, SkScalar dstGamma); + +/** + * A regular mask contains linear alpha values. A gamma correcting mask + * contains non-linear alpha values in an attempt to create gamma correct blits + * in the presence of a gamma incorrect (linear) blend in the blitter. + * + * SkMaskGamma creates and maintains tables which convert linear alpha values + * to gamma correcting alpha values. + * @param R The number of luminance bits to use [1, 8] from the red channel. + * @param G The number of luminance bits to use [1, 8] from the green channel. + * @param B The number of luminance bits to use [1, 8] from the blue channel. + */ +template class SkTMaskGamma : public SkRefCnt { + +public: + + /** Creates a linear SkTMaskGamma. */ + SkTMaskGamma() : fIsLinear(true) { } + + /** + * Creates tables to convert linear alpha values to gamma correcting alpha + * values. + * + * @param contrast A value in the range [0.0, 1.0] which indicates the + * amount of artificial contrast to add. + * @param paint The color space in which the paint color was chosen. + * @param device The color space of the target device. + */ + SkTMaskGamma(SkScalar contrast, SkScalar paintGamma, SkScalar deviceGamma) : fIsLinear(false) { + const SkColorSpaceLuminance& paintConvert = SkColorSpaceLuminance::Fetch(paintGamma); + const SkColorSpaceLuminance& deviceConvert = SkColorSpaceLuminance::Fetch(deviceGamma); + for (U8CPU i = 0; i < (1 << MAX_LUM_BITS); ++i) { + U8CPU lum = sk_t_scale255(i); + SkTMaskGamma_build_correcting_lut(fGammaTables[i], lum, contrast, + paintConvert, paintGamma, + deviceConvert, deviceGamma); + } + } + + /** Given a color, returns the closest canonical color. */ + static SkColor CanonicalColor(SkColor color) { + return SkColorSetRGB( + sk_t_scale255(SkColorGetR(color) >> (8 - R_LUM_BITS)), + sk_t_scale255(SkColorGetG(color) >> (8 - G_LUM_BITS)), + sk_t_scale255(SkColorGetB(color) >> (8 - B_LUM_BITS))); + } + + /** The type of the mask pre-blend which will be returned from preBlend(SkColor). */ + typedef SkTMaskPreBlend PreBlend; + + /** + * Provides access to the tables appropriate for converting linear alpha + * values into gamma correcting alpha values when drawing the given color + * through the mask. The destination color will be approximated. + */ + PreBlend preBlend(SkColor color) const; + + /** + * Get dimensions for the full table set, so it can be allocated as a block. + */ + void getGammaTableDimensions(int* tableWidth, int* numTables) const { + *tableWidth = 256; + *numTables = (1 << MAX_LUM_BITS); + } + + /** + * Provides direct access to the full table set, so it can be uploaded + * into a texture or analyzed in other ways. + * Returns nullptr if fGammaTables hasn't been initialized. + */ + const uint8_t* getGammaTables() const { + return fIsLinear ? nullptr : (const uint8_t*) fGammaTables; + } + +private: + static const int MAX_LUM_BITS = + B_LUM_BITS > (R_LUM_BITS > G_LUM_BITS ? R_LUM_BITS : G_LUM_BITS) + ? B_LUM_BITS : (R_LUM_BITS > G_LUM_BITS ? R_LUM_BITS : G_LUM_BITS); + uint8_t fGammaTables[1 << MAX_LUM_BITS][256]; + bool fIsLinear; + + using INHERITED = SkRefCnt; +}; + + +/** + * SkTMaskPreBlend is a tear-off of SkTMaskGamma. It provides the tables to + * convert a linear alpha value for a given channel to a gamma correcting alpha + * value for that channel. This class is immutable. + * + * If fR, fG, or fB is nullptr, all of them will be. This indicates that no mask + * pre blend should be applied. SkTMaskPreBlend::isApplicable() is provided as + * a convenience function to test for the absence of this case. + */ +template class SkTMaskPreBlend { +private: + SkTMaskPreBlend(sk_sp> parent, + const uint8_t* r, const uint8_t* g, const uint8_t* b) + : fParent(std::move(parent)), fR(r), fG(g), fB(b) { } + + sk_sp> fParent; + friend class SkTMaskGamma; +public: + /** Creates a non applicable SkTMaskPreBlend. */ + SkTMaskPreBlend() : fParent(), fR(nullptr), fG(nullptr), fB(nullptr) { } + + /** + * This copy contructor exists for correctness, but should never be called + * when return value optimization is enabled. + */ + SkTMaskPreBlend(const SkTMaskPreBlend& that) + : fParent(that.fParent), fR(that.fR), fG(that.fG), fB(that.fB) { } + + ~SkTMaskPreBlend() { } + + /** True if this PreBlend should be applied. When false, fR, fG, and fB are nullptr. */ + bool isApplicable() const { return SkToBool(this->fG); } + + const uint8_t* fR; + const uint8_t* fG; + const uint8_t* fB; +}; + +template +SkTMaskPreBlend +SkTMaskGamma::preBlend(SkColor color) const { + return fIsLinear ? SkTMaskPreBlend() + : SkTMaskPreBlend(sk_ref_sp(this), + fGammaTables[SkColorGetR(color) >> (8 - MAX_LUM_BITS)], + fGammaTables[SkColorGetG(color) >> (8 - MAX_LUM_BITS)], + fGammaTables[SkColorGetB(color) >> (8 - MAX_LUM_BITS)]); +} + +///@{ +/** + * If APPLY_LUT is false, returns component unchanged. + * If APPLY_LUT is true, returns lut[component]. + * @param APPLY_LUT whether or not the look-up table should be applied to component. + * @component the initial component. + * @lut a look-up table which transforms the component. + */ +template static inline U8CPU sk_apply_lut_if(U8CPU component, const uint8_t*) { + return component; +} +template<> /*static*/ inline U8CPU sk_apply_lut_if(U8CPU component, const uint8_t* lut) { + return lut[component]; +} +///@} + +#endif diff --git a/gfx/skia/skia/src/core/SkMatrix.cpp b/gfx/skia/skia/src/core/SkMatrix.cpp new file mode 100644 index 0000000000..863f428a0b --- /dev/null +++ b/gfx/skia/skia/src/core/SkMatrix.cpp @@ -0,0 +1,1881 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkMatrix.h" + +#include "include/core/SkPath.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkSize.h" +#include "include/core/SkString.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkFloatBits.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkVx.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMatrixUtils.h" +#include "src/core/SkSamplingPriv.h" + +#include +#include + +struct SkSamplingOptions; + +void SkMatrix::doNormalizePerspective() { + // If the bottom row of the matrix is [0, 0, not_one], we will treat the matrix as if it + // is in perspective, even though it stills behaves like its affine. If we divide everything + // by the not_one value, then it will behave the same, but will be treated as affine, + // and therefore faster (e.g. clients can forward-difference calculations). + // + if (0 == fMat[SkMatrix::kMPersp0] && 0 == fMat[SkMatrix::kMPersp1]) { + SkScalar p2 = fMat[SkMatrix::kMPersp2]; + if (p2 != 0 && p2 != 1) { + double inv = 1.0 / p2; + for (int i = 0; i < 6; ++i) { + fMat[i] = SkDoubleToScalar(fMat[i] * inv); + } + fMat[SkMatrix::kMPersp2] = 1; + } + this->setTypeMask(kUnknown_Mask); + } +} + +SkMatrix& SkMatrix::reset() { *this = SkMatrix(); return *this; } + +SkMatrix& SkMatrix::set9(const SkScalar buffer[9]) { + memcpy(fMat, buffer, 9 * sizeof(SkScalar)); + this->setTypeMask(kUnknown_Mask); + return *this; +} + +SkMatrix& SkMatrix::setAffine(const SkScalar buffer[6]) { + fMat[kMScaleX] = buffer[kAScaleX]; + fMat[kMSkewX] = buffer[kASkewX]; + fMat[kMTransX] = buffer[kATransX]; + fMat[kMSkewY] = buffer[kASkewY]; + fMat[kMScaleY] = buffer[kAScaleY]; + fMat[kMTransY] = buffer[kATransY]; + fMat[kMPersp0] = 0; + fMat[kMPersp1] = 0; + fMat[kMPersp2] = 1; + this->setTypeMask(kUnknown_Mask); + return *this; +} + +// this aligns with the masks, so we can compute a mask from a variable 0/1 +enum { + kTranslate_Shift, + kScale_Shift, + kAffine_Shift, + kPerspective_Shift, + kRectStaysRect_Shift +}; + +static const int32_t kScalar1Int = 0x3f800000; + +uint8_t SkMatrix::computePerspectiveTypeMask() const { + // Benchmarking suggests that replacing this set of SkScalarAs2sCompliment + // is a win, but replacing those below is not. We don't yet understand + // that result. + if (fMat[kMPersp0] != 0 || fMat[kMPersp1] != 0 || fMat[kMPersp2] != 1) { + // If this is a perspective transform, we return true for all other + // transform flags - this does not disable any optimizations, respects + // the rule that the type mask must be conservative, and speeds up + // type mask computation. + return SkToU8(kORableMasks); + } + + return SkToU8(kOnlyPerspectiveValid_Mask | kUnknown_Mask); +} + +uint8_t SkMatrix::computeTypeMask() const { + unsigned mask = 0; + + if (fMat[kMPersp0] != 0 || fMat[kMPersp1] != 0 || fMat[kMPersp2] != 1) { + // Once it is determined that that this is a perspective transform, + // all other flags are moot as far as optimizations are concerned. + return SkToU8(kORableMasks); + } + + if (fMat[kMTransX] != 0 || fMat[kMTransY] != 0) { + mask |= kTranslate_Mask; + } + + int m00 = SkScalarAs2sCompliment(fMat[SkMatrix::kMScaleX]); + int m01 = SkScalarAs2sCompliment(fMat[SkMatrix::kMSkewX]); + int m10 = SkScalarAs2sCompliment(fMat[SkMatrix::kMSkewY]); + int m11 = SkScalarAs2sCompliment(fMat[SkMatrix::kMScaleY]); + + if (m01 | m10) { + // The skew components may be scale-inducing, unless we are dealing + // with a pure rotation. Testing for a pure rotation is expensive, + // so we opt for being conservative by always setting the scale bit. + // along with affine. + // By doing this, we are also ensuring that matrices have the same + // type masks as their inverses. + mask |= kAffine_Mask | kScale_Mask; + + // For rectStaysRect, in the affine case, we only need check that + // the primary diagonal is all zeros and that the secondary diagonal + // is all non-zero. + + // map non-zero to 1 + m01 = m01 != 0; + m10 = m10 != 0; + + int dp0 = 0 == (m00 | m11) ; // true if both are 0 + int ds1 = m01 & m10; // true if both are 1 + + mask |= (dp0 & ds1) << kRectStaysRect_Shift; + } else { + // Only test for scale explicitly if not affine, since affine sets the + // scale bit. + if ((m00 ^ kScalar1Int) | (m11 ^ kScalar1Int)) { + mask |= kScale_Mask; + } + + // Not affine, therefore we already know secondary diagonal is + // all zeros, so we just need to check that primary diagonal is + // all non-zero. + + // map non-zero to 1 + m00 = m00 != 0; + m11 = m11 != 0; + + // record if the (p)rimary diagonal is all non-zero + mask |= (m00 & m11) << kRectStaysRect_Shift; + } + + return SkToU8(mask); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool operator==(const SkMatrix& a, const SkMatrix& b) { + const SkScalar* SK_RESTRICT ma = a.fMat; + const SkScalar* SK_RESTRICT mb = b.fMat; + + return ma[0] == mb[0] && ma[1] == mb[1] && ma[2] == mb[2] && + ma[3] == mb[3] && ma[4] == mb[4] && ma[5] == mb[5] && + ma[6] == mb[6] && ma[7] == mb[7] && ma[8] == mb[8]; +} + +/////////////////////////////////////////////////////////////////////////////// + +// helper function to determine if upper-left 2x2 of matrix is degenerate +static inline bool is_degenerate_2x2(SkScalar scaleX, SkScalar skewX, + SkScalar skewY, SkScalar scaleY) { + SkScalar perp_dot = scaleX*scaleY - skewX*skewY; + return SkScalarNearlyZero(perp_dot, SK_ScalarNearlyZero*SK_ScalarNearlyZero); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkMatrix::isSimilarity(SkScalar tol) const { + // if identity or translate matrix + TypeMask mask = this->getType(); + if (mask <= kTranslate_Mask) { + return true; + } + if (mask & kPerspective_Mask) { + return false; + } + + SkScalar mx = fMat[kMScaleX]; + SkScalar my = fMat[kMScaleY]; + // if no skew, can just compare scale factors + if (!(mask & kAffine_Mask)) { + return !SkScalarNearlyZero(mx) && SkScalarNearlyEqual(SkScalarAbs(mx), SkScalarAbs(my)); + } + SkScalar sx = fMat[kMSkewX]; + SkScalar sy = fMat[kMSkewY]; + + if (is_degenerate_2x2(mx, sx, sy, my)) { + return false; + } + + // upper 2x2 is rotation/reflection + uniform scale if basis vectors + // are 90 degree rotations of each other + return (SkScalarNearlyEqual(mx, my, tol) && SkScalarNearlyEqual(sx, -sy, tol)) + || (SkScalarNearlyEqual(mx, -my, tol) && SkScalarNearlyEqual(sx, sy, tol)); +} + +bool SkMatrix::preservesRightAngles(SkScalar tol) const { + TypeMask mask = this->getType(); + + if (mask <= kTranslate_Mask) { + // identity, translate and/or scale + return true; + } + if (mask & kPerspective_Mask) { + return false; + } + + SkASSERT(mask & (kAffine_Mask | kScale_Mask)); + + SkScalar mx = fMat[kMScaleX]; + SkScalar my = fMat[kMScaleY]; + SkScalar sx = fMat[kMSkewX]; + SkScalar sy = fMat[kMSkewY]; + + if (is_degenerate_2x2(mx, sx, sy, my)) { + return false; + } + + // upper 2x2 is scale + rotation/reflection if basis vectors are orthogonal + SkVector vec[2]; + vec[0].set(mx, sy); + vec[1].set(sx, my); + + return SkScalarNearlyZero(vec[0].dot(vec[1]), SkScalarSquare(tol)); +} + +/////////////////////////////////////////////////////////////////////////////// + +static inline SkScalar sdot(SkScalar a, SkScalar b, SkScalar c, SkScalar d) { + return a * b + c * d; +} + +static inline SkScalar sdot(SkScalar a, SkScalar b, SkScalar c, SkScalar d, + SkScalar e, SkScalar f) { + return a * b + c * d + e * f; +} + +static inline SkScalar scross(SkScalar a, SkScalar b, SkScalar c, SkScalar d) { + return a * b - c * d; +} + +SkMatrix& SkMatrix::setTranslate(SkScalar dx, SkScalar dy) { + *this = SkMatrix(1, 0, dx, + 0, 1, dy, + 0, 0, 1, + (dx != 0 || dy != 0) ? kTranslate_Mask | kRectStaysRect_Mask + : kIdentity_Mask | kRectStaysRect_Mask); + return *this; +} + +SkMatrix& SkMatrix::preTranslate(SkScalar dx, SkScalar dy) { + const unsigned mask = this->getType(); + + if (mask <= kTranslate_Mask) { + fMat[kMTransX] += dx; + fMat[kMTransY] += dy; + } else if (mask & kPerspective_Mask) { + SkMatrix m; + m.setTranslate(dx, dy); + return this->preConcat(m); + } else { + fMat[kMTransX] += sdot(fMat[kMScaleX], dx, fMat[kMSkewX], dy); + fMat[kMTransY] += sdot(fMat[kMSkewY], dx, fMat[kMScaleY], dy); + } + this->updateTranslateMask(); + return *this; +} + +SkMatrix& SkMatrix::postTranslate(SkScalar dx, SkScalar dy) { + if (this->hasPerspective()) { + SkMatrix m; + m.setTranslate(dx, dy); + this->postConcat(m); + } else { + fMat[kMTransX] += dx; + fMat[kMTransY] += dy; + this->updateTranslateMask(); + } + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// + +SkMatrix& SkMatrix::setScale(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) { + if (1 == sx && 1 == sy) { + this->reset(); + } else { + this->setScaleTranslate(sx, sy, px - sx * px, py - sy * py); + } + return *this; +} + +SkMatrix& SkMatrix::setScale(SkScalar sx, SkScalar sy) { + auto rectMask = (sx == 0 || sy == 0) ? 0 : kRectStaysRect_Mask; + *this = SkMatrix(sx, 0, 0, + 0, sy, 0, + 0, 0, 1, + (sx == 1 && sy == 1) ? kIdentity_Mask | rectMask + : kScale_Mask | rectMask); + return *this; +} + +SkMatrix& SkMatrix::preScale(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) { + if (1 == sx && 1 == sy) { + return *this; + } + + SkMatrix m; + m.setScale(sx, sy, px, py); + return this->preConcat(m); +} + +SkMatrix& SkMatrix::preScale(SkScalar sx, SkScalar sy) { + if (1 == sx && 1 == sy) { + return *this; + } + + // the assumption is that these multiplies are very cheap, and that + // a full concat and/or just computing the matrix type is more expensive. + // Also, the fixed-point case checks for overflow, but the float doesn't, + // so we can get away with these blind multiplies. + + fMat[kMScaleX] *= sx; + fMat[kMSkewY] *= sx; + fMat[kMPersp0] *= sx; + + fMat[kMSkewX] *= sy; + fMat[kMScaleY] *= sy; + fMat[kMPersp1] *= sy; + + // Attempt to simplify our type when applying an inverse scale. + // TODO: The persp/affine preconditions are in place to keep the mask consistent with + // what computeTypeMask() would produce (persp/skew always implies kScale). + // We should investigate whether these flag dependencies are truly needed. + if (fMat[kMScaleX] == 1 && fMat[kMScaleY] == 1 + && !(fTypeMask & (kPerspective_Mask | kAffine_Mask))) { + this->clearTypeMask(kScale_Mask); + } else { + this->orTypeMask(kScale_Mask); + // Remove kRectStaysRect if the preScale factors were 0 + if (!sx || !sy) { + this->clearTypeMask(kRectStaysRect_Mask); + } + } + return *this; +} + +SkMatrix& SkMatrix::postScale(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) { + if (1 == sx && 1 == sy) { + return *this; + } + SkMatrix m; + m.setScale(sx, sy, px, py); + return this->postConcat(m); +} + +SkMatrix& SkMatrix::postScale(SkScalar sx, SkScalar sy) { + if (1 == sx && 1 == sy) { + return *this; + } + SkMatrix m; + m.setScale(sx, sy); + return this->postConcat(m); +} + +// this perhaps can go away, if we have a fract/high-precision way to +// scale matrices +bool SkMatrix::postIDiv(int divx, int divy) { + if (divx == 0 || divy == 0) { + return false; + } + + const float invX = 1.f / divx; + const float invY = 1.f / divy; + + fMat[kMScaleX] *= invX; + fMat[kMSkewX] *= invX; + fMat[kMTransX] *= invX; + + fMat[kMScaleY] *= invY; + fMat[kMSkewY] *= invY; + fMat[kMTransY] *= invY; + + this->setTypeMask(kUnknown_Mask); + return true; +} + +//////////////////////////////////////////////////////////////////////////////////// + +SkMatrix& SkMatrix::setSinCos(SkScalar sinV, SkScalar cosV, SkScalar px, SkScalar py) { + const SkScalar oneMinusCosV = 1 - cosV; + + fMat[kMScaleX] = cosV; + fMat[kMSkewX] = -sinV; + fMat[kMTransX] = sdot(sinV, py, oneMinusCosV, px); + + fMat[kMSkewY] = sinV; + fMat[kMScaleY] = cosV; + fMat[kMTransY] = sdot(-sinV, px, oneMinusCosV, py); + + fMat[kMPersp0] = fMat[kMPersp1] = 0; + fMat[kMPersp2] = 1; + + this->setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); + return *this; +} + +SkMatrix& SkMatrix::setRSXform(const SkRSXform& xform) { + fMat[kMScaleX] = xform.fSCos; + fMat[kMSkewX] = -xform.fSSin; + fMat[kMTransX] = xform.fTx; + + fMat[kMSkewY] = xform.fSSin; + fMat[kMScaleY] = xform.fSCos; + fMat[kMTransY] = xform.fTy; + + fMat[kMPersp0] = fMat[kMPersp1] = 0; + fMat[kMPersp2] = 1; + + this->setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); + return *this; +} + +SkMatrix& SkMatrix::setSinCos(SkScalar sinV, SkScalar cosV) { + fMat[kMScaleX] = cosV; + fMat[kMSkewX] = -sinV; + fMat[kMTransX] = 0; + + fMat[kMSkewY] = sinV; + fMat[kMScaleY] = cosV; + fMat[kMTransY] = 0; + + fMat[kMPersp0] = fMat[kMPersp1] = 0; + fMat[kMPersp2] = 1; + + this->setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); + return *this; +} + +SkMatrix& SkMatrix::setRotate(SkScalar degrees, SkScalar px, SkScalar py) { + SkScalar rad = SkDegreesToRadians(degrees); + return this->setSinCos(SkScalarSinSnapToZero(rad), SkScalarCosSnapToZero(rad), px, py); +} + +SkMatrix& SkMatrix::setRotate(SkScalar degrees) { + SkScalar rad = SkDegreesToRadians(degrees); + return this->setSinCos(SkScalarSinSnapToZero(rad), SkScalarCosSnapToZero(rad)); +} + +SkMatrix& SkMatrix::preRotate(SkScalar degrees, SkScalar px, SkScalar py) { + SkMatrix m; + m.setRotate(degrees, px, py); + return this->preConcat(m); +} + +SkMatrix& SkMatrix::preRotate(SkScalar degrees) { + SkMatrix m; + m.setRotate(degrees); + return this->preConcat(m); +} + +SkMatrix& SkMatrix::postRotate(SkScalar degrees, SkScalar px, SkScalar py) { + SkMatrix m; + m.setRotate(degrees, px, py); + return this->postConcat(m); +} + +SkMatrix& SkMatrix::postRotate(SkScalar degrees) { + SkMatrix m; + m.setRotate(degrees); + return this->postConcat(m); +} + +//////////////////////////////////////////////////////////////////////////////////// + +SkMatrix& SkMatrix::setSkew(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) { + *this = SkMatrix(1, sx, -sx * py, + sy, 1, -sy * px, + 0, 0, 1, + kUnknown_Mask | kOnlyPerspectiveValid_Mask); + return *this; +} + +SkMatrix& SkMatrix::setSkew(SkScalar sx, SkScalar sy) { + fMat[kMScaleX] = 1; + fMat[kMSkewX] = sx; + fMat[kMTransX] = 0; + + fMat[kMSkewY] = sy; + fMat[kMScaleY] = 1; + fMat[kMTransY] = 0; + + fMat[kMPersp0] = fMat[kMPersp1] = 0; + fMat[kMPersp2] = 1; + + this->setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); + return *this; +} + +SkMatrix& SkMatrix::preSkew(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) { + SkMatrix m; + m.setSkew(sx, sy, px, py); + return this->preConcat(m); +} + +SkMatrix& SkMatrix::preSkew(SkScalar sx, SkScalar sy) { + SkMatrix m; + m.setSkew(sx, sy); + return this->preConcat(m); +} + +SkMatrix& SkMatrix::postSkew(SkScalar sx, SkScalar sy, SkScalar px, SkScalar py) { + SkMatrix m; + m.setSkew(sx, sy, px, py); + return this->postConcat(m); +} + +SkMatrix& SkMatrix::postSkew(SkScalar sx, SkScalar sy) { + SkMatrix m; + m.setSkew(sx, sy); + return this->postConcat(m); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkMatrix::setRectToRect(const SkRect& src, const SkRect& dst, ScaleToFit align) { + if (src.isEmpty()) { + this->reset(); + return false; + } + + if (dst.isEmpty()) { + sk_bzero(fMat, 8 * sizeof(SkScalar)); + fMat[kMPersp2] = 1; + this->setTypeMask(kScale_Mask); + } else { + SkScalar tx, sx = dst.width() / src.width(); + SkScalar ty, sy = dst.height() / src.height(); + bool xLarger = false; + + if (align != kFill_ScaleToFit) { + if (sx > sy) { + xLarger = true; + sx = sy; + } else { + sy = sx; + } + } + + tx = dst.fLeft - src.fLeft * sx; + ty = dst.fTop - src.fTop * sy; + if (align == kCenter_ScaleToFit || align == kEnd_ScaleToFit) { + SkScalar diff; + + if (xLarger) { + diff = dst.width() - src.width() * sy; + } else { + diff = dst.height() - src.height() * sy; + } + + if (align == kCenter_ScaleToFit) { + diff = SkScalarHalf(diff); + } + + if (xLarger) { + tx += diff; + } else { + ty += diff; + } + } + + this->setScaleTranslate(sx, sy, tx, ty); + } + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +static inline float muladdmul(float a, float b, float c, float d) { + return sk_double_to_float((double)a * b + (double)c * d); +} + +static inline float rowcol3(const float row[], const float col[]) { + return row[0] * col[0] + row[1] * col[3] + row[2] * col[6]; +} + +static bool only_scale_and_translate(unsigned mask) { + return 0 == (mask & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)); +} + +SkMatrix& SkMatrix::setConcat(const SkMatrix& a, const SkMatrix& b) { + TypeMask aType = a.getType(); + TypeMask bType = b.getType(); + + if (a.isTriviallyIdentity()) { + *this = b; + } else if (b.isTriviallyIdentity()) { + *this = a; + } else if (only_scale_and_translate(aType | bType)) { + this->setScaleTranslate(a.fMat[kMScaleX] * b.fMat[kMScaleX], + a.fMat[kMScaleY] * b.fMat[kMScaleY], + a.fMat[kMScaleX] * b.fMat[kMTransX] + a.fMat[kMTransX], + a.fMat[kMScaleY] * b.fMat[kMTransY] + a.fMat[kMTransY]); + } else { + SkMatrix tmp; + + if ((aType | bType) & kPerspective_Mask) { + tmp.fMat[kMScaleX] = rowcol3(&a.fMat[0], &b.fMat[0]); + tmp.fMat[kMSkewX] = rowcol3(&a.fMat[0], &b.fMat[1]); + tmp.fMat[kMTransX] = rowcol3(&a.fMat[0], &b.fMat[2]); + tmp.fMat[kMSkewY] = rowcol3(&a.fMat[3], &b.fMat[0]); + tmp.fMat[kMScaleY] = rowcol3(&a.fMat[3], &b.fMat[1]); + tmp.fMat[kMTransY] = rowcol3(&a.fMat[3], &b.fMat[2]); + tmp.fMat[kMPersp0] = rowcol3(&a.fMat[6], &b.fMat[0]); + tmp.fMat[kMPersp1] = rowcol3(&a.fMat[6], &b.fMat[1]); + tmp.fMat[kMPersp2] = rowcol3(&a.fMat[6], &b.fMat[2]); + + tmp.setTypeMask(kUnknown_Mask); + } else { + tmp.fMat[kMScaleX] = muladdmul(a.fMat[kMScaleX], + b.fMat[kMScaleX], + a.fMat[kMSkewX], + b.fMat[kMSkewY]); + + tmp.fMat[kMSkewX] = muladdmul(a.fMat[kMScaleX], + b.fMat[kMSkewX], + a.fMat[kMSkewX], + b.fMat[kMScaleY]); + + tmp.fMat[kMTransX] = muladdmul(a.fMat[kMScaleX], + b.fMat[kMTransX], + a.fMat[kMSkewX], + b.fMat[kMTransY]) + a.fMat[kMTransX]; + + tmp.fMat[kMSkewY] = muladdmul(a.fMat[kMSkewY], + b.fMat[kMScaleX], + a.fMat[kMScaleY], + b.fMat[kMSkewY]); + + tmp.fMat[kMScaleY] = muladdmul(a.fMat[kMSkewY], + b.fMat[kMSkewX], + a.fMat[kMScaleY], + b.fMat[kMScaleY]); + + tmp.fMat[kMTransY] = muladdmul(a.fMat[kMSkewY], + b.fMat[kMTransX], + a.fMat[kMScaleY], + b.fMat[kMTransY]) + a.fMat[kMTransY]; + + tmp.fMat[kMPersp0] = 0; + tmp.fMat[kMPersp1] = 0; + tmp.fMat[kMPersp2] = 1; + //SkDebugf("Concat mat non-persp type: %d\n", tmp.getType()); + //SkASSERT(!(tmp.getType() & kPerspective_Mask)); + tmp.setTypeMask(kUnknown_Mask | kOnlyPerspectiveValid_Mask); + } + *this = tmp; + } + return *this; +} + +SkMatrix& SkMatrix::preConcat(const SkMatrix& mat) { + // check for identity first, so we don't do a needless copy of ourselves + // to ourselves inside setConcat() + if(!mat.isIdentity()) { + this->setConcat(*this, mat); + } + return *this; +} + +SkMatrix& SkMatrix::postConcat(const SkMatrix& mat) { + // check for identity first, so we don't do a needless copy of ourselves + // to ourselves inside setConcat() + if (!mat.isIdentity()) { + this->setConcat(mat, *this); + } + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// + +/* Matrix inversion is very expensive, but also the place where keeping + precision may be most important (here and matrix concat). Hence to avoid + bitmap blitting artifacts when walking the inverse, we use doubles for + the intermediate math, even though we know that is more expensive. + */ + +static inline SkScalar scross_dscale(SkScalar a, SkScalar b, + SkScalar c, SkScalar d, double scale) { + return SkDoubleToScalar(scross(a, b, c, d) * scale); +} + +static inline double dcross(double a, double b, double c, double d) { + return a * b - c * d; +} + +static inline SkScalar dcross_dscale(double a, double b, + double c, double d, double scale) { + return SkDoubleToScalar(dcross(a, b, c, d) * scale); +} + +static double sk_determinant(const float mat[9], int isPerspective) { + if (isPerspective) { + return mat[SkMatrix::kMScaleX] * + dcross(mat[SkMatrix::kMScaleY], mat[SkMatrix::kMPersp2], + mat[SkMatrix::kMTransY], mat[SkMatrix::kMPersp1]) + + + mat[SkMatrix::kMSkewX] * + dcross(mat[SkMatrix::kMTransY], mat[SkMatrix::kMPersp0], + mat[SkMatrix::kMSkewY], mat[SkMatrix::kMPersp2]) + + + mat[SkMatrix::kMTransX] * + dcross(mat[SkMatrix::kMSkewY], mat[SkMatrix::kMPersp1], + mat[SkMatrix::kMScaleY], mat[SkMatrix::kMPersp0]); + } else { + return dcross(mat[SkMatrix::kMScaleX], mat[SkMatrix::kMScaleY], + mat[SkMatrix::kMSkewX], mat[SkMatrix::kMSkewY]); + } +} + +static double sk_inv_determinant(const float mat[9], int isPerspective) { + double det = sk_determinant(mat, isPerspective); + + // Since the determinant is on the order of the cube of the matrix members, + // compare to the cube of the default nearly-zero constant (although an + // estimate of the condition number would be better if it wasn't so expensive). + if (SkScalarNearlyZero(sk_double_to_float(det), + SK_ScalarNearlyZero * SK_ScalarNearlyZero * SK_ScalarNearlyZero)) { + return 0; + } + return 1.0 / det; +} + +void SkMatrix::SetAffineIdentity(SkScalar affine[6]) { + affine[kAScaleX] = 1; + affine[kASkewY] = 0; + affine[kASkewX] = 0; + affine[kAScaleY] = 1; + affine[kATransX] = 0; + affine[kATransY] = 0; +} + +bool SkMatrix::asAffine(SkScalar affine[6]) const { + if (this->hasPerspective()) { + return false; + } + if (affine) { + affine[kAScaleX] = this->fMat[kMScaleX]; + affine[kASkewY] = this->fMat[kMSkewY]; + affine[kASkewX] = this->fMat[kMSkewX]; + affine[kAScaleY] = this->fMat[kMScaleY]; + affine[kATransX] = this->fMat[kMTransX]; + affine[kATransY] = this->fMat[kMTransY]; + } + return true; +} + +void SkMatrix::mapPoints(SkPoint dst[], const SkPoint src[], int count) const { + SkASSERT((dst && src && count > 0) || 0 == count); + // no partial overlap + SkASSERT(src == dst || &dst[count] <= &src[0] || &src[count] <= &dst[0]); + this->getMapPtsProc()(*this, dst, src, count); +} + +void SkMatrix::mapXY(SkScalar x, SkScalar y, SkPoint* result) const { + SkASSERT(result); + this->getMapXYProc()(*this, x, y, result); +} + +void SkMatrix::ComputeInv(SkScalar dst[9], const SkScalar src[9], double invDet, bool isPersp) { + SkASSERT(src != dst); + SkASSERT(src && dst); + + if (isPersp) { + dst[kMScaleX] = scross_dscale(src[kMScaleY], src[kMPersp2], src[kMTransY], src[kMPersp1], invDet); + dst[kMSkewX] = scross_dscale(src[kMTransX], src[kMPersp1], src[kMSkewX], src[kMPersp2], invDet); + dst[kMTransX] = scross_dscale(src[kMSkewX], src[kMTransY], src[kMTransX], src[kMScaleY], invDet); + + dst[kMSkewY] = scross_dscale(src[kMTransY], src[kMPersp0], src[kMSkewY], src[kMPersp2], invDet); + dst[kMScaleY] = scross_dscale(src[kMScaleX], src[kMPersp2], src[kMTransX], src[kMPersp0], invDet); + dst[kMTransY] = scross_dscale(src[kMTransX], src[kMSkewY], src[kMScaleX], src[kMTransY], invDet); + + dst[kMPersp0] = scross_dscale(src[kMSkewY], src[kMPersp1], src[kMScaleY], src[kMPersp0], invDet); + dst[kMPersp1] = scross_dscale(src[kMSkewX], src[kMPersp0], src[kMScaleX], src[kMPersp1], invDet); + dst[kMPersp2] = scross_dscale(src[kMScaleX], src[kMScaleY], src[kMSkewX], src[kMSkewY], invDet); + } else { // not perspective + dst[kMScaleX] = SkDoubleToScalar(src[kMScaleY] * invDet); + dst[kMSkewX] = SkDoubleToScalar(-src[kMSkewX] * invDet); + dst[kMTransX] = dcross_dscale(src[kMSkewX], src[kMTransY], src[kMScaleY], src[kMTransX], invDet); + + dst[kMSkewY] = SkDoubleToScalar(-src[kMSkewY] * invDet); + dst[kMScaleY] = SkDoubleToScalar(src[kMScaleX] * invDet); + dst[kMTransY] = dcross_dscale(src[kMSkewY], src[kMTransX], src[kMScaleX], src[kMTransY], invDet); + + dst[kMPersp0] = 0; + dst[kMPersp1] = 0; + dst[kMPersp2] = 1; + } +} + +bool SkMatrix::invertNonIdentity(SkMatrix* inv) const { + SkASSERT(!this->isIdentity()); + + TypeMask mask = this->getType(); + + if (0 == (mask & ~(kScale_Mask | kTranslate_Mask))) { + bool invertible = true; + if (inv) { + if (mask & kScale_Mask) { + SkScalar invX = fMat[kMScaleX]; + SkScalar invY = fMat[kMScaleY]; + if (0 == invX || 0 == invY) { + return false; + } + invX = SkScalarInvert(invX); + invY = SkScalarInvert(invY); + + // Must be careful when writing to inv, since it may be the + // same memory as this. + + inv->fMat[kMSkewX] = inv->fMat[kMSkewY] = + inv->fMat[kMPersp0] = inv->fMat[kMPersp1] = 0; + + inv->fMat[kMScaleX] = invX; + inv->fMat[kMScaleY] = invY; + inv->fMat[kMPersp2] = 1; + inv->fMat[kMTransX] = -fMat[kMTransX] * invX; + inv->fMat[kMTransY] = -fMat[kMTransY] * invY; + + inv->setTypeMask(mask | kRectStaysRect_Mask); + } else { + // translate only + inv->setTranslate(-fMat[kMTransX], -fMat[kMTransY]); + } + } else { // inv is nullptr, just check if we're invertible + if (!fMat[kMScaleX] || !fMat[kMScaleY]) { + invertible = false; + } + } + return invertible; + } + + int isPersp = mask & kPerspective_Mask; + double invDet = sk_inv_determinant(fMat, isPersp); + + if (invDet == 0) { // underflow + return false; + } + + bool applyingInPlace = (inv == this); + + SkMatrix* tmp = inv; + + SkMatrix storage; + if (applyingInPlace || nullptr == tmp) { + tmp = &storage; // we either need to avoid trampling memory or have no memory + } + + ComputeInv(tmp->fMat, fMat, invDet, isPersp); + if (!tmp->isFinite()) { + return false; + } + + tmp->setTypeMask(fTypeMask); + + if (applyingInPlace) { + *inv = storage; // need to copy answer back + } + + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkMatrix::Identity_pts(const SkMatrix& m, SkPoint dst[], const SkPoint src[], int count) { + SkASSERT(m.getType() == 0); + + if (dst != src && count > 0) { + memcpy(dst, src, count * sizeof(SkPoint)); + } +} + +void SkMatrix::Trans_pts(const SkMatrix& m, SkPoint dst[], const SkPoint src[], int count) { + SkASSERT(m.getType() <= SkMatrix::kTranslate_Mask); + if (count > 0) { + SkScalar tx = m.getTranslateX(); + SkScalar ty = m.getTranslateY(); + if (count & 1) { + dst->fX = src->fX + tx; + dst->fY = src->fY + ty; + src += 1; + dst += 1; + } + skvx::float4 trans4(tx, ty, tx, ty); + count >>= 1; + if (count & 1) { + (skvx::float4::Load(src) + trans4).store(dst); + src += 2; + dst += 2; + } + count >>= 1; + for (int i = 0; i < count; ++i) { + (skvx::float4::Load(src+0) + trans4).store(dst+0); + (skvx::float4::Load(src+2) + trans4).store(dst+2); + src += 4; + dst += 4; + } + } +} + +void SkMatrix::Scale_pts(const SkMatrix& m, SkPoint dst[], const SkPoint src[], int count) { + SkASSERT(m.getType() <= (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)); + if (count > 0) { + SkScalar tx = m.getTranslateX(); + SkScalar ty = m.getTranslateY(); + SkScalar sx = m.getScaleX(); + SkScalar sy = m.getScaleY(); + skvx::float4 trans4(tx, ty, tx, ty); + skvx::float4 scale4(sx, sy, sx, sy); + if (count & 1) { + skvx::float4 p(src->fX, src->fY, 0, 0); + p = p * scale4 + trans4; + dst->fX = p[0]; + dst->fY = p[1]; + src += 1; + dst += 1; + } + count >>= 1; + if (count & 1) { + (skvx::float4::Load(src) * scale4 + trans4).store(dst); + src += 2; + dst += 2; + } + count >>= 1; + for (int i = 0; i < count; ++i) { + (skvx::float4::Load(src+0) * scale4 + trans4).store(dst+0); + (skvx::float4::Load(src+2) * scale4 + trans4).store(dst+2); + src += 4; + dst += 4; + } + } +} + +void SkMatrix::Persp_pts(const SkMatrix& m, SkPoint dst[], + const SkPoint src[], int count) { + SkASSERT(m.hasPerspective()); + + if (count > 0) { + do { + SkScalar sy = src->fY; + SkScalar sx = src->fX; + src += 1; + + SkScalar x = sdot(sx, m.fMat[kMScaleX], sy, m.fMat[kMSkewX]) + m.fMat[kMTransX]; + SkScalar y = sdot(sx, m.fMat[kMSkewY], sy, m.fMat[kMScaleY]) + m.fMat[kMTransY]; + SkScalar z = sdot(sx, m.fMat[kMPersp0], sy, m.fMat[kMPersp1]) + m.fMat[kMPersp2]; + if (z) { + z = 1 / z; + } + + dst->fY = y * z; + dst->fX = x * z; + dst += 1; + } while (--count); + } +} + +void SkMatrix::Affine_vpts(const SkMatrix& m, SkPoint dst[], const SkPoint src[], int count) { + SkASSERT(m.getType() != SkMatrix::kPerspective_Mask); + if (count > 0) { + SkScalar tx = m.getTranslateX(); + SkScalar ty = m.getTranslateY(); + SkScalar sx = m.getScaleX(); + SkScalar sy = m.getScaleY(); + SkScalar kx = m.getSkewX(); + SkScalar ky = m.getSkewY(); + skvx::float4 trans4(tx, ty, tx, ty); + skvx::float4 scale4(sx, sy, sx, sy); + skvx::float4 skew4(kx, ky, kx, ky); // applied to swizzle of src4 + bool trailingElement = (count & 1); + count >>= 1; + skvx::float4 src4; + for (int i = 0; i < count; ++i) { + src4 = skvx::float4::Load(src); + skvx::float4 swz4 = skvx::shuffle<1,0,3,2>(src4); // y0 x0, y1 x1 + (src4 * scale4 + swz4 * skew4 + trans4).store(dst); + src += 2; + dst += 2; + } + if (trailingElement) { + // We use the same logic here to ensure that the math stays consistent throughout, even + // though the high float2 is ignored. + src4.lo = skvx::float2::Load(src); + skvx::float4 swz4 = skvx::shuffle<1,0,3,2>(src4); // y0 x0, y1 x1 + (src4 * scale4 + swz4 * skew4 + trans4).lo.store(dst); + } + } +} + +const SkMatrix::MapPtsProc SkMatrix::gMapPtsProcs[] = { + SkMatrix::Identity_pts, SkMatrix::Trans_pts, + SkMatrix::Scale_pts, SkMatrix::Scale_pts, + SkMatrix::Affine_vpts, SkMatrix::Affine_vpts, + SkMatrix::Affine_vpts, SkMatrix::Affine_vpts, + // repeat the persp proc 8 times + SkMatrix::Persp_pts, SkMatrix::Persp_pts, + SkMatrix::Persp_pts, SkMatrix::Persp_pts, + SkMatrix::Persp_pts, SkMatrix::Persp_pts, + SkMatrix::Persp_pts, SkMatrix::Persp_pts +}; + +/////////////////////////////////////////////////////////////////////////////// + +void SkMatrixPriv::MapHomogeneousPointsWithStride(const SkMatrix& mx, SkPoint3 dst[], + size_t dstStride, const SkPoint3 src[], + size_t srcStride, int count) { + SkASSERT((dst && src && count > 0) || 0 == count); + // no partial overlap + SkASSERT(src == dst || &dst[count] <= &src[0] || &src[count] <= &dst[0]); + + if (count > 0) { + if (mx.isIdentity()) { + if (src != dst) { + if (srcStride == sizeof(SkPoint3) && dstStride == sizeof(SkPoint3)) { + memcpy(dst, src, count * sizeof(SkPoint3)); + } else { + for (int i = 0; i < count; ++i) { + *dst = *src; + dst = reinterpret_cast(reinterpret_cast(dst) + dstStride); + src = reinterpret_cast(reinterpret_cast(src) + + srcStride); + } + } + } + return; + } + do { + SkScalar sx = src->fX; + SkScalar sy = src->fY; + SkScalar sw = src->fZ; + src = reinterpret_cast(reinterpret_cast(src) + srcStride); + const SkScalar* mat = mx.fMat; + typedef SkMatrix M; + SkScalar x = sdot(sx, mat[M::kMScaleX], sy, mat[M::kMSkewX], sw, mat[M::kMTransX]); + SkScalar y = sdot(sx, mat[M::kMSkewY], sy, mat[M::kMScaleY], sw, mat[M::kMTransY]); + SkScalar w = sdot(sx, mat[M::kMPersp0], sy, mat[M::kMPersp1], sw, mat[M::kMPersp2]); + + dst->set(x, y, w); + dst = reinterpret_cast(reinterpret_cast(dst) + dstStride); + } while (--count); + } +} + +void SkMatrix::mapHomogeneousPoints(SkPoint3 dst[], const SkPoint3 src[], int count) const { + SkMatrixPriv::MapHomogeneousPointsWithStride(*this, dst, sizeof(SkPoint3), src, + sizeof(SkPoint3), count); +} + +void SkMatrix::mapHomogeneousPoints(SkPoint3 dst[], const SkPoint src[], int count) const { + if (this->isIdentity()) { + for (int i = 0; i < count; ++i) { + dst[i] = { src[i].fX, src[i].fY, 1 }; + } + } else if (this->hasPerspective()) { + for (int i = 0; i < count; ++i) { + dst[i] = { + fMat[0] * src[i].fX + fMat[1] * src[i].fY + fMat[2], + fMat[3] * src[i].fX + fMat[4] * src[i].fY + fMat[5], + fMat[6] * src[i].fX + fMat[7] * src[i].fY + fMat[8], + }; + } + } else { // affine + for (int i = 0; i < count; ++i) { + dst[i] = { + fMat[0] * src[i].fX + fMat[1] * src[i].fY + fMat[2], + fMat[3] * src[i].fX + fMat[4] * src[i].fY + fMat[5], + 1, + }; + } + } +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkMatrix::mapVectors(SkPoint dst[], const SkPoint src[], int count) const { + if (this->hasPerspective()) { + SkPoint origin; + + MapXYProc proc = this->getMapXYProc(); + proc(*this, 0, 0, &origin); + + for (int i = count - 1; i >= 0; --i) { + SkPoint tmp; + + proc(*this, src[i].fX, src[i].fY, &tmp); + dst[i].set(tmp.fX - origin.fX, tmp.fY - origin.fY); + } + } else { + SkMatrix tmp = *this; + + tmp.fMat[kMTransX] = tmp.fMat[kMTransY] = 0; + tmp.clearTypeMask(kTranslate_Mask); + tmp.mapPoints(dst, src, count); + } +} + +static skvx::float4 sort_as_rect(const skvx::float4& ltrb) { + skvx::float4 rblt(ltrb[2], ltrb[3], ltrb[0], ltrb[1]); + auto min = skvx::min(ltrb, rblt); + auto max = skvx::max(ltrb, rblt); + // We can extract either pair [0,1] or [2,3] from min and max and be correct, but on + // ARM this sequence generates the fastest (a single instruction). + return skvx::float4(min[2], min[3], max[0], max[1]); +} + +void SkMatrix::mapRectScaleTranslate(SkRect* dst, const SkRect& src) const { + SkASSERT(dst); + SkASSERT(this->isScaleTranslate()); + + SkScalar sx = fMat[kMScaleX]; + SkScalar sy = fMat[kMScaleY]; + SkScalar tx = fMat[kMTransX]; + SkScalar ty = fMat[kMTransY]; + skvx::float4 scale(sx, sy, sx, sy); + skvx::float4 trans(tx, ty, tx, ty); + sort_as_rect(skvx::float4::Load(&src.fLeft) * scale + trans).store(&dst->fLeft); +} + +bool SkMatrix::mapRect(SkRect* dst, const SkRect& src, SkApplyPerspectiveClip pc) const { + SkASSERT(dst); + + if (this->getType() <= kTranslate_Mask) { + SkScalar tx = fMat[kMTransX]; + SkScalar ty = fMat[kMTransY]; + skvx::float4 trans(tx, ty, tx, ty); + sort_as_rect(skvx::float4::Load(&src.fLeft) + trans).store(&dst->fLeft); + return true; + } + if (this->isScaleTranslate()) { + this->mapRectScaleTranslate(dst, src); + return true; + } else if (pc == SkApplyPerspectiveClip::kYes && this->hasPerspective()) { + SkPath path; + path.addRect(src); + path.transform(*this); + *dst = path.getBounds(); + return false; + } else { + SkPoint quad[4]; + + src.toQuad(quad); + this->mapPoints(quad, quad, 4); + dst->setBoundsNoCheck(quad, 4); + return this->rectStaysRect(); // might still return true if rotated by 90, etc. + } +} + +SkScalar SkMatrix::mapRadius(SkScalar radius) const { + SkVector vec[2]; + + vec[0].set(radius, 0); + vec[1].set(0, radius); + this->mapVectors(vec, 2); + + SkScalar d0 = vec[0].length(); + SkScalar d1 = vec[1].length(); + + // return geometric mean + return SkScalarSqrt(d0 * d1); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkMatrix::Persp_xy(const SkMatrix& m, SkScalar sx, SkScalar sy, + SkPoint* pt) { + SkASSERT(m.hasPerspective()); + + SkScalar x = sdot(sx, m.fMat[kMScaleX], sy, m.fMat[kMSkewX]) + m.fMat[kMTransX]; + SkScalar y = sdot(sx, m.fMat[kMSkewY], sy, m.fMat[kMScaleY]) + m.fMat[kMTransY]; + SkScalar z = sdot(sx, m.fMat[kMPersp0], sy, m.fMat[kMPersp1]) + m.fMat[kMPersp2]; + if (z) { + z = 1 / z; + } + pt->fX = x * z; + pt->fY = y * z; +} + +void SkMatrix::RotTrans_xy(const SkMatrix& m, SkScalar sx, SkScalar sy, + SkPoint* pt) { + SkASSERT((m.getType() & (kAffine_Mask | kPerspective_Mask)) == kAffine_Mask); + + pt->fX = sdot(sx, m.fMat[kMScaleX], sy, m.fMat[kMSkewX]) + m.fMat[kMTransX]; + pt->fY = sdot(sx, m.fMat[kMSkewY], sy, m.fMat[kMScaleY]) + m.fMat[kMTransY]; +} + +void SkMatrix::Rot_xy(const SkMatrix& m, SkScalar sx, SkScalar sy, + SkPoint* pt) { + SkASSERT((m.getType() & (kAffine_Mask | kPerspective_Mask))== kAffine_Mask); + SkASSERT(0 == m.fMat[kMTransX]); + SkASSERT(0 == m.fMat[kMTransY]); + + pt->fX = sdot(sx, m.fMat[kMScaleX], sy, m.fMat[kMSkewX]) + m.fMat[kMTransX]; + pt->fY = sdot(sx, m.fMat[kMSkewY], sy, m.fMat[kMScaleY]) + m.fMat[kMTransY]; +} + +void SkMatrix::ScaleTrans_xy(const SkMatrix& m, SkScalar sx, SkScalar sy, + SkPoint* pt) { + SkASSERT((m.getType() & (kScale_Mask | kAffine_Mask | kPerspective_Mask)) + == kScale_Mask); + + pt->fX = sx * m.fMat[kMScaleX] + m.fMat[kMTransX]; + pt->fY = sy * m.fMat[kMScaleY] + m.fMat[kMTransY]; +} + +void SkMatrix::Scale_xy(const SkMatrix& m, SkScalar sx, SkScalar sy, + SkPoint* pt) { + SkASSERT((m.getType() & (kScale_Mask | kAffine_Mask | kPerspective_Mask)) + == kScale_Mask); + SkASSERT(0 == m.fMat[kMTransX]); + SkASSERT(0 == m.fMat[kMTransY]); + + pt->fX = sx * m.fMat[kMScaleX]; + pt->fY = sy * m.fMat[kMScaleY]; +} + +void SkMatrix::Trans_xy(const SkMatrix& m, SkScalar sx, SkScalar sy, + SkPoint* pt) { + SkASSERT(m.getType() == kTranslate_Mask); + + pt->fX = sx + m.fMat[kMTransX]; + pt->fY = sy + m.fMat[kMTransY]; +} + +void SkMatrix::Identity_xy(const SkMatrix& m, SkScalar sx, SkScalar sy, + SkPoint* pt) { + SkASSERT(0 == m.getType()); + + pt->fX = sx; + pt->fY = sy; +} + +const SkMatrix::MapXYProc SkMatrix::gMapXYProcs[] = { + SkMatrix::Identity_xy, SkMatrix::Trans_xy, + SkMatrix::Scale_xy, SkMatrix::ScaleTrans_xy, + SkMatrix::Rot_xy, SkMatrix::RotTrans_xy, + SkMatrix::Rot_xy, SkMatrix::RotTrans_xy, + // repeat the persp proc 8 times + SkMatrix::Persp_xy, SkMatrix::Persp_xy, + SkMatrix::Persp_xy, SkMatrix::Persp_xy, + SkMatrix::Persp_xy, SkMatrix::Persp_xy, + SkMatrix::Persp_xy, SkMatrix::Persp_xy +}; + +/////////////////////////////////////////////////////////////////////////////// +#if 0 +// if its nearly zero (just made up 26, perhaps it should be bigger or smaller) +#define PerspNearlyZero(x) SkScalarNearlyZero(x, (1.0f / (1 << 26))) + +bool SkMatrix::isFixedStepInX() const { + return PerspNearlyZero(fMat[kMPersp0]); +} + +SkVector SkMatrix::fixedStepInX(SkScalar y) const { + SkASSERT(PerspNearlyZero(fMat[kMPersp0])); + if (PerspNearlyZero(fMat[kMPersp1]) && + PerspNearlyZero(fMat[kMPersp2] - 1)) { + return SkVector::Make(fMat[kMScaleX], fMat[kMSkewY]); + } else { + SkScalar z = y * fMat[kMPersp1] + fMat[kMPersp2]; + return SkVector::Make(fMat[kMScaleX] / z, fMat[kMSkewY] / z); + } +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +static inline bool checkForZero(float x) { + return x*x == 0; +} + +bool SkMatrix::Poly2Proc(const SkPoint srcPt[], SkMatrix* dst) { + dst->fMat[kMScaleX] = srcPt[1].fY - srcPt[0].fY; + dst->fMat[kMSkewY] = srcPt[0].fX - srcPt[1].fX; + dst->fMat[kMPersp0] = 0; + + dst->fMat[kMSkewX] = srcPt[1].fX - srcPt[0].fX; + dst->fMat[kMScaleY] = srcPt[1].fY - srcPt[0].fY; + dst->fMat[kMPersp1] = 0; + + dst->fMat[kMTransX] = srcPt[0].fX; + dst->fMat[kMTransY] = srcPt[0].fY; + dst->fMat[kMPersp2] = 1; + dst->setTypeMask(kUnknown_Mask); + return true; +} + +bool SkMatrix::Poly3Proc(const SkPoint srcPt[], SkMatrix* dst) { + dst->fMat[kMScaleX] = srcPt[2].fX - srcPt[0].fX; + dst->fMat[kMSkewY] = srcPt[2].fY - srcPt[0].fY; + dst->fMat[kMPersp0] = 0; + + dst->fMat[kMSkewX] = srcPt[1].fX - srcPt[0].fX; + dst->fMat[kMScaleY] = srcPt[1].fY - srcPt[0].fY; + dst->fMat[kMPersp1] = 0; + + dst->fMat[kMTransX] = srcPt[0].fX; + dst->fMat[kMTransY] = srcPt[0].fY; + dst->fMat[kMPersp2] = 1; + dst->setTypeMask(kUnknown_Mask); + return true; +} + +bool SkMatrix::Poly4Proc(const SkPoint srcPt[], SkMatrix* dst) { + float a1, a2; + float x0, y0, x1, y1, x2, y2; + + x0 = srcPt[2].fX - srcPt[0].fX; + y0 = srcPt[2].fY - srcPt[0].fY; + x1 = srcPt[2].fX - srcPt[1].fX; + y1 = srcPt[2].fY - srcPt[1].fY; + x2 = srcPt[2].fX - srcPt[3].fX; + y2 = srcPt[2].fY - srcPt[3].fY; + + /* check if abs(x2) > abs(y2) */ + if ( x2 > 0 ? y2 > 0 ? x2 > y2 : x2 > -y2 : y2 > 0 ? -x2 > y2 : x2 < y2) { + float denom = sk_ieee_float_divide(x1 * y2, x2) - y1; + if (checkForZero(denom)) { + return false; + } + a1 = (((x0 - x1) * y2 / x2) - y0 + y1) / denom; + } else { + float denom = x1 - sk_ieee_float_divide(y1 * x2, y2); + if (checkForZero(denom)) { + return false; + } + a1 = (x0 - x1 - sk_ieee_float_divide((y0 - y1) * x2, y2)) / denom; + } + + /* check if abs(x1) > abs(y1) */ + if ( x1 > 0 ? y1 > 0 ? x1 > y1 : x1 > -y1 : y1 > 0 ? -x1 > y1 : x1 < y1) { + float denom = y2 - sk_ieee_float_divide(x2 * y1, x1); + if (checkForZero(denom)) { + return false; + } + a2 = (y0 - y2 - sk_ieee_float_divide((x0 - x2) * y1, x1)) / denom; + } else { + float denom = sk_ieee_float_divide(y2 * x1, y1) - x2; + if (checkForZero(denom)) { + return false; + } + a2 = (sk_ieee_float_divide((y0 - y2) * x1, y1) - x0 + x2) / denom; + } + + dst->fMat[kMScaleX] = a2 * srcPt[3].fX + srcPt[3].fX - srcPt[0].fX; + dst->fMat[kMSkewY] = a2 * srcPt[3].fY + srcPt[3].fY - srcPt[0].fY; + dst->fMat[kMPersp0] = a2; + + dst->fMat[kMSkewX] = a1 * srcPt[1].fX + srcPt[1].fX - srcPt[0].fX; + dst->fMat[kMScaleY] = a1 * srcPt[1].fY + srcPt[1].fY - srcPt[0].fY; + dst->fMat[kMPersp1] = a1; + + dst->fMat[kMTransX] = srcPt[0].fX; + dst->fMat[kMTransY] = srcPt[0].fY; + dst->fMat[kMPersp2] = 1; + dst->setTypeMask(kUnknown_Mask); + return true; +} + +typedef bool (*PolyMapProc)(const SkPoint[], SkMatrix*); + +/* Adapted from Rob Johnson's original sample code in QuickDraw GX +*/ +bool SkMatrix::setPolyToPoly(const SkPoint src[], const SkPoint dst[], int count) { + if ((unsigned)count > 4) { + SkDebugf("--- SkMatrix::setPolyToPoly count out of range %d\n", count); + return false; + } + + if (0 == count) { + this->reset(); + return true; + } + if (1 == count) { + this->setTranslate(dst[0].fX - src[0].fX, dst[0].fY - src[0].fY); + return true; + } + + const PolyMapProc gPolyMapProcs[] = { + SkMatrix::Poly2Proc, SkMatrix::Poly3Proc, SkMatrix::Poly4Proc + }; + PolyMapProc proc = gPolyMapProcs[count - 2]; + + SkMatrix tempMap, result; + + if (!proc(src, &tempMap)) { + return false; + } + if (!tempMap.invert(&result)) { + return false; + } + if (!proc(dst, &tempMap)) { + return false; + } + this->setConcat(tempMap, result); + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +enum MinMaxOrBoth { + kMin_MinMaxOrBoth, + kMax_MinMaxOrBoth, + kBoth_MinMaxOrBoth +}; + +template bool get_scale_factor(SkMatrix::TypeMask typeMask, + const SkScalar m[9], + SkScalar results[/*1 or 2*/]) { + if (typeMask & SkMatrix::kPerspective_Mask) { + return false; + } + if (SkMatrix::kIdentity_Mask == typeMask) { + results[0] = SK_Scalar1; + if (kBoth_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + results[1] = SK_Scalar1; + } + return true; + } + if (!(typeMask & SkMatrix::kAffine_Mask)) { + if (kMin_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + results[0] = std::min(SkScalarAbs(m[SkMatrix::kMScaleX]), + SkScalarAbs(m[SkMatrix::kMScaleY])); + } else if (kMax_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + results[0] = std::max(SkScalarAbs(m[SkMatrix::kMScaleX]), + SkScalarAbs(m[SkMatrix::kMScaleY])); + } else { + results[0] = SkScalarAbs(m[SkMatrix::kMScaleX]); + results[1] = SkScalarAbs(m[SkMatrix::kMScaleY]); + if (results[0] > results[1]) { + using std::swap; + swap(results[0], results[1]); + } + } + return true; + } + // ignore the translation part of the matrix, just look at 2x2 portion. + // compute singular values, take largest or smallest abs value. + // [a b; b c] = A^T*A + SkScalar a = sdot(m[SkMatrix::kMScaleX], m[SkMatrix::kMScaleX], + m[SkMatrix::kMSkewY], m[SkMatrix::kMSkewY]); + SkScalar b = sdot(m[SkMatrix::kMScaleX], m[SkMatrix::kMSkewX], + m[SkMatrix::kMScaleY], m[SkMatrix::kMSkewY]); + SkScalar c = sdot(m[SkMatrix::kMSkewX], m[SkMatrix::kMSkewX], + m[SkMatrix::kMScaleY], m[SkMatrix::kMScaleY]); + // eigenvalues of A^T*A are the squared singular values of A. + // characteristic equation is det((A^T*A) - l*I) = 0 + // l^2 - (a + c)l + (ac-b^2) + // solve using quadratic equation (divisor is non-zero since l^2 has 1 coeff + // and roots are guaranteed to be pos and real). + SkScalar bSqd = b * b; + // if upper left 2x2 is orthogonal save some math + if (bSqd <= SK_ScalarNearlyZero*SK_ScalarNearlyZero) { + if (kMin_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + results[0] = std::min(a, c); + } else if (kMax_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + results[0] = std::max(a, c); + } else { + results[0] = a; + results[1] = c; + if (results[0] > results[1]) { + using std::swap; + swap(results[0], results[1]); + } + } + } else { + SkScalar aminusc = a - c; + SkScalar apluscdiv2 = SkScalarHalf(a + c); + SkScalar x = SkScalarHalf(SkScalarSqrt(aminusc * aminusc + 4 * bSqd)); + if (kMin_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + results[0] = apluscdiv2 - x; + } else if (kMax_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + results[0] = apluscdiv2 + x; + } else { + results[0] = apluscdiv2 - x; + results[1] = apluscdiv2 + x; + } + } + if (!SkScalarIsFinite(results[0])) { + return false; + } + // Due to the floating point inaccuracy, there might be an error in a, b, c + // calculated by sdot, further deepened by subsequent arithmetic operations + // on them. Therefore, we allow and cap the nearly-zero negative values. + if (results[0] < 0) { + results[0] = 0; + } + results[0] = SkScalarSqrt(results[0]); + if (kBoth_MinMaxOrBoth == MIN_MAX_OR_BOTH) { + if (!SkScalarIsFinite(results[1])) { + return false; + } + if (results[1] < 0) { + results[1] = 0; + } + results[1] = SkScalarSqrt(results[1]); + } + return true; +} + +SkScalar SkMatrix::getMinScale() const { + SkScalar factor; + if (get_scale_factor(this->getType(), fMat, &factor)) { + return factor; + } else { + return -1; + } +} + +SkScalar SkMatrix::getMaxScale() const { + SkScalar factor; + if (get_scale_factor(this->getType(), fMat, &factor)) { + return factor; + } else { + return -1; + } +} + +bool SkMatrix::getMinMaxScales(SkScalar scaleFactors[2]) const { + return get_scale_factor(this->getType(), fMat, scaleFactors); +} + +const SkMatrix& SkMatrix::I() { + static constexpr SkMatrix identity; + SkASSERT(identity.isIdentity()); + return identity; +} + +const SkMatrix& SkMatrix::InvalidMatrix() { + static constexpr SkMatrix invalid(SK_ScalarMax, SK_ScalarMax, SK_ScalarMax, + SK_ScalarMax, SK_ScalarMax, SK_ScalarMax, + SK_ScalarMax, SK_ScalarMax, SK_ScalarMax, + kTranslate_Mask | kScale_Mask | + kAffine_Mask | kPerspective_Mask); + return invalid; +} + +bool SkMatrix::decomposeScale(SkSize* scale, SkMatrix* remaining) const { + if (this->hasPerspective()) { + return false; + } + + const SkScalar sx = SkVector::Length(this->getScaleX(), this->getSkewY()); + const SkScalar sy = SkVector::Length(this->getSkewX(), this->getScaleY()); + if (!SkScalarIsFinite(sx) || !SkScalarIsFinite(sy) || + SkScalarNearlyZero(sx) || SkScalarNearlyZero(sy)) { + return false; + } + + if (scale) { + scale->set(sx, sy); + } + if (remaining) { + *remaining = *this; + remaining->preScale(SkScalarInvert(sx), SkScalarInvert(sy)); + } + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +size_t SkMatrix::writeToMemory(void* buffer) const { + // TODO write less for simple matrices + static const size_t sizeInMemory = 9 * sizeof(SkScalar); + if (buffer) { + memcpy(buffer, fMat, sizeInMemory); + } + return sizeInMemory; +} + +size_t SkMatrix::readFromMemory(const void* buffer, size_t length) { + static const size_t sizeInMemory = 9 * sizeof(SkScalar); + if (length < sizeInMemory) { + return 0; + } + memcpy(fMat, buffer, sizeInMemory); + this->setTypeMask(kUnknown_Mask); + // Figure out the type now so that we're thread-safe + (void)this->getType(); + return sizeInMemory; +} + +void SkMatrix::dump() const { + SkString str; + str.appendf("[%8.4f %8.4f %8.4f][%8.4f %8.4f %8.4f][%8.4f %8.4f %8.4f]", + fMat[0], fMat[1], fMat[2], fMat[3], fMat[4], fMat[5], + fMat[6], fMat[7], fMat[8]); + SkDebugf("%s\n", str.c_str()); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkTreatAsSprite(const SkMatrix& mat, const SkISize& size, const SkSamplingOptions& sampling, + bool isAntiAlias) { + if (!SkSamplingPriv::NoChangeWithIdentityMatrix(sampling)) { + return false; + } + + // Our path aa is 2-bits, and our rect aa is 8, so we could use 8, + // but in practice 4 seems enough (still looks smooth) and allows + // more slightly fractional cases to fall into the fast (sprite) case. + static const unsigned kAntiAliasSubpixelBits = 4; + + const unsigned subpixelBits = isAntiAlias ? kAntiAliasSubpixelBits : 0; + + // quick reject on affine or perspective + if (mat.getType() & ~(SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) { + return false; + } + + // quick success check + if (!subpixelBits && !(mat.getType() & ~SkMatrix::kTranslate_Mask)) { + return true; + } + + // mapRect supports negative scales, so we eliminate those first + if (mat.getScaleX() < 0 || mat.getScaleY() < 0) { + return false; + } + + SkRect dst; + SkIRect isrc = SkIRect::MakeSize(size); + + { + SkRect src; + src.set(isrc); + mat.mapRect(&dst, src); + } + + // just apply the translate to isrc + isrc.offset(SkScalarRoundToInt(mat.getTranslateX()), + SkScalarRoundToInt(mat.getTranslateY())); + + if (subpixelBits) { + isrc.fLeft = SkLeftShift(isrc.fLeft, subpixelBits); + isrc.fTop = SkLeftShift(isrc.fTop, subpixelBits); + isrc.fRight = SkLeftShift(isrc.fRight, subpixelBits); + isrc.fBottom = SkLeftShift(isrc.fBottom, subpixelBits); + + const float scale = 1 << subpixelBits; + dst.fLeft *= scale; + dst.fTop *= scale; + dst.fRight *= scale; + dst.fBottom *= scale; + } + + SkIRect idst; + dst.round(&idst); + return isrc == idst; +} + +// A square matrix M can be decomposed (via polar decomposition) into two matrices -- +// an orthogonal matrix Q and a symmetric matrix S. In turn we can decompose S into U*W*U^T, +// where U is another orthogonal matrix and W is a scale matrix. These can be recombined +// to give M = (Q*U)*W*U^T, i.e., the product of two orthogonal matrices and a scale matrix. +// +// The one wrinkle is that traditionally Q may contain a reflection -- the +// calculation has been rejiggered to put that reflection into W. +bool SkDecomposeUpper2x2(const SkMatrix& matrix, + SkPoint* rotation1, + SkPoint* scale, + SkPoint* rotation2) { + + SkScalar A = matrix[SkMatrix::kMScaleX]; + SkScalar B = matrix[SkMatrix::kMSkewX]; + SkScalar C = matrix[SkMatrix::kMSkewY]; + SkScalar D = matrix[SkMatrix::kMScaleY]; + + if (is_degenerate_2x2(A, B, C, D)) { + return false; + } + + double w1, w2; + SkScalar cos1, sin1; + SkScalar cos2, sin2; + + // do polar decomposition (M = Q*S) + SkScalar cosQ, sinQ; + double Sa, Sb, Sd; + // if M is already symmetric (i.e., M = I*S) + if (SkScalarNearlyEqual(B, C)) { + cosQ = 1; + sinQ = 0; + + Sa = A; + Sb = B; + Sd = D; + } else { + cosQ = A + D; + sinQ = C - B; + SkScalar reciplen = SkScalarInvert(SkScalarSqrt(cosQ*cosQ + sinQ*sinQ)); + cosQ *= reciplen; + sinQ *= reciplen; + + // S = Q^-1*M + // we don't calc Sc since it's symmetric + Sa = A*cosQ + C*sinQ; + Sb = B*cosQ + D*sinQ; + Sd = -B*sinQ + D*cosQ; + } + + // Now we need to compute eigenvalues of S (our scale factors) + // and eigenvectors (bases for our rotation) + // From this, should be able to reconstruct S as U*W*U^T + if (SkScalarNearlyZero(SkDoubleToScalar(Sb))) { + // already diagonalized + cos1 = 1; + sin1 = 0; + w1 = Sa; + w2 = Sd; + cos2 = cosQ; + sin2 = sinQ; + } else { + double diff = Sa - Sd; + double discriminant = sqrt(diff*diff + 4.0*Sb*Sb); + double trace = Sa + Sd; + if (diff > 0) { + w1 = 0.5*(trace + discriminant); + w2 = 0.5*(trace - discriminant); + } else { + w1 = 0.5*(trace - discriminant); + w2 = 0.5*(trace + discriminant); + } + + cos1 = SkDoubleToScalar(Sb); sin1 = SkDoubleToScalar(w1 - Sa); + SkScalar reciplen = SkScalarInvert(SkScalarSqrt(cos1*cos1 + sin1*sin1)); + cos1 *= reciplen; + sin1 *= reciplen; + + // rotation 2 is composition of Q and U + cos2 = cos1*cosQ - sin1*sinQ; + sin2 = sin1*cosQ + cos1*sinQ; + + // rotation 1 is U^T + sin1 = -sin1; + } + + if (scale) { + scale->fX = SkDoubleToScalar(w1); + scale->fY = SkDoubleToScalar(w2); + } + if (rotation1) { + rotation1->fX = cos1; + rotation1->fY = sin1; + } + if (rotation2) { + rotation2->fX = cos2; + rotation2->fY = sin2; + } + + return true; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkScalar SkMatrixPriv::DifferentialAreaScale(const SkMatrix& m, const SkPoint& p) { + // [m00 m01 m02] [f(u,v)] + // Assuming M = [m10 m11 m12], define the projected p'(u,v) = [g(u,v)] where + // [m20 m12 m22] + // [x] [u] + // f(u,v) = x(u,v) / w(u,v), g(u,v) = y(u,v) / w(u,v) and [y] = M*[v] + // [w] [1] + // + // Then the differential scale factor between p = (u,v) and p' is |det J|, + // where J is the Jacobian for p': [df/du dg/du] + // [df/dv dg/dv] + // and df/du = (w*dx/du - x*dw/du)/w^2, dg/du = (w*dy/du - y*dw/du)/w^2 + // df/dv = (w*dx/dv - x*dw/dv)/w^2, dg/dv = (w*dy/dv - y*dw/dv)/w^2 + // + // From here, |det J| can be rewritten as |det J'/w^3|, where + // [x y w ] [x y w ] + // J' = [dx/du dy/du dw/du] = [m00 m10 m20] + // [dx/dv dy/dv dw/dv] [m01 m11 m21] + SkPoint3 xyw; + m.mapHomogeneousPoints(&xyw, &p, 1); + + if (xyw.fZ < SK_ScalarNearlyZero) { + // Reaching the discontinuity of xy/w and where the point would clip to w >= 0 + return SK_ScalarInfinity; + } + SkMatrix jacobian = SkMatrix::MakeAll(xyw.fX, xyw.fY, xyw.fZ, + m.getScaleX(), m.getSkewY(), m.getPerspX(), + m.getSkewX(), m.getScaleY(), m.getPerspY()); + + double denom = 1.0 / xyw.fZ; // 1/w + denom = denom * denom * denom; // 1/w^3 + return SkScalarAbs(SkDoubleToScalar(sk_determinant(jacobian.fMat, true) * denom)); +} + +bool SkMatrixPriv::NearlyAffine(const SkMatrix& m, + const SkRect& bounds, + SkScalar tolerance) { + if (!m.hasPerspective()) { + return true; + } + + // The idea here is that we are computing the differential area scale at each corner, + // and comparing them with some tolerance value. If they are similar, then we can say + // that the transformation is nearly affine. + + // We can map the four points simultaneously. + SkPoint quad[4]; + bounds.toQuad(quad); + SkPoint3 xyw[4]; + m.mapHomogeneousPoints(xyw, quad, 4); + + // Since the Jacobian is a 3x3 matrix, the determinant is a scalar triple product, + // and the initial cross product is constant across all four points. + SkPoint3 v1{m.getScaleX(), m.getSkewY(), m.getPerspX()}; + SkPoint3 v2{m.getSkewX(), m.getScaleY(), m.getPerspY()}; + SkPoint3 detCrossProd = v1.cross(v2); + + // Start with the calculations at P0. + if (xyw[0].fZ < SK_ScalarNearlyZero) { + // Reaching the discontinuity of xy/w and where the point would clip to w >= 0 + return false; + } + + // Performing a dot product with the pre-w divide transformed point completes + // the scalar triple product and the determinant calculation. + double det = detCrossProd.dot(xyw[0]); + // From that we can compute the differential area scale at P0. + double denom = 1.0 / xyw[0].fZ; // 1/w + denom = denom * denom * denom; // 1/w^3 + SkScalar a0 = SkScalarAbs(SkDoubleToScalar(det*denom)); + + // Now we compare P0's scale with that at the other three points + tolerance *= tolerance; // squared tolerance since we're comparing area + for (int i = 1; i < 4; ++i) { + if (xyw[i].fZ < SK_ScalarNearlyZero) { + // Reaching the discontinuity of xy/w and where the point would clip to w >= 0 + return false; + } + + det = detCrossProd.dot(xyw[i]); // completing scalar triple product + denom = 1.0 / xyw[i].fZ; // 1/w + denom = denom * denom * denom; // 1/w^3 + SkScalar a = SkScalarAbs(SkDoubleToScalar(det*denom)); + if (!SkScalarNearlyEqual(a0, a, tolerance)) { + return false; + } + } + + return true; +} + +SkScalar SkMatrixPriv::ComputeResScaleForStroking(const SkMatrix& matrix) { + // Not sure how to handle perspective differently, so we just don't try (yet) + SkScalar sx = SkPoint::Length(matrix[SkMatrix::kMScaleX], matrix[SkMatrix::kMSkewY]); + SkScalar sy = SkPoint::Length(matrix[SkMatrix::kMSkewX], matrix[SkMatrix::kMScaleY]); + if (SkScalarsAreFinite(sx, sy)) { + SkScalar scale = std::max(sx, sy); + if (scale > 0) { + static const SkScalar kMaxStrokeScale = 1e5f; + return std::min(scale, kMaxStrokeScale); + } + } + return 1; +} diff --git a/gfx/skia/skia/src/core/SkMatrixInvert.cpp b/gfx/skia/skia/src/core/SkMatrixInvert.cpp new file mode 100644 index 0000000000..ea8d36702c --- /dev/null +++ b/gfx/skia/skia/src/core/SkMatrixInvert.cpp @@ -0,0 +1,144 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkMatrixInvert.h" + +#include "include/private/base/SkFloatingPoint.h" + +SkScalar SkInvert2x2Matrix(const SkScalar inMatrix[4], SkScalar outMatrix[4]) { + double a00 = inMatrix[0]; + double a01 = inMatrix[1]; + double a10 = inMatrix[2]; + double a11 = inMatrix[3]; + + // Calculate the determinant + double determinant = a00 * a11 - a01 * a10; + if (outMatrix) { + double invdet = sk_ieee_double_divide(1.0, determinant); + outMatrix[0] = a11 * invdet; + outMatrix[1] = -a01 * invdet; + outMatrix[2] = -a10 * invdet; + outMatrix[3] = a00 * invdet; + // If 1/det overflows to infinity (i.e. det is denormalized) or any of the inverted matrix + // values is non-finite, return zero to indicate a non-invertible matrix. + if (!SkScalarsAreFinite(outMatrix, 4)) { + determinant = 0.0f; + } + } + return determinant; +} + +SkScalar SkInvert3x3Matrix(const SkScalar inMatrix[9], SkScalar outMatrix[9]) { + double a00 = inMatrix[0]; + double a01 = inMatrix[1]; + double a02 = inMatrix[2]; + double a10 = inMatrix[3]; + double a11 = inMatrix[4]; + double a12 = inMatrix[5]; + double a20 = inMatrix[6]; + double a21 = inMatrix[7]; + double a22 = inMatrix[8]; + + double b01 = a22 * a11 - a12 * a21; + double b11 = -a22 * a10 + a12 * a20; + double b21 = a21 * a10 - a11 * a20; + + // Calculate the determinant + double determinant = a00 * b01 + a01 * b11 + a02 * b21; + if (outMatrix) { + double invdet = sk_ieee_double_divide(1.0, determinant); + outMatrix[0] = b01 * invdet; + outMatrix[1] = (-a22 * a01 + a02 * a21) * invdet; + outMatrix[2] = ( a12 * a01 - a02 * a11) * invdet; + outMatrix[3] = b11 * invdet; + outMatrix[4] = ( a22 * a00 - a02 * a20) * invdet; + outMatrix[5] = (-a12 * a00 + a02 * a10) * invdet; + outMatrix[6] = b21 * invdet; + outMatrix[7] = (-a21 * a00 + a01 * a20) * invdet; + outMatrix[8] = ( a11 * a00 - a01 * a10) * invdet; + // If 1/det overflows to infinity (i.e. det is denormalized) or any of the inverted matrix + // values is non-finite, return zero to indicate a non-invertible matrix. + if (!SkScalarsAreFinite(outMatrix, 9)) { + determinant = 0.0f; + } + } + return determinant; +} + +SkScalar SkInvert4x4Matrix(const SkScalar inMatrix[16], SkScalar outMatrix[16]) { + double a00 = inMatrix[0]; + double a01 = inMatrix[1]; + double a02 = inMatrix[2]; + double a03 = inMatrix[3]; + double a10 = inMatrix[4]; + double a11 = inMatrix[5]; + double a12 = inMatrix[6]; + double a13 = inMatrix[7]; + double a20 = inMatrix[8]; + double a21 = inMatrix[9]; + double a22 = inMatrix[10]; + double a23 = inMatrix[11]; + double a30 = inMatrix[12]; + double a31 = inMatrix[13]; + double a32 = inMatrix[14]; + double a33 = inMatrix[15]; + + double b00 = a00 * a11 - a01 * a10; + double b01 = a00 * a12 - a02 * a10; + double b02 = a00 * a13 - a03 * a10; + double b03 = a01 * a12 - a02 * a11; + double b04 = a01 * a13 - a03 * a11; + double b05 = a02 * a13 - a03 * a12; + double b06 = a20 * a31 - a21 * a30; + double b07 = a20 * a32 - a22 * a30; + double b08 = a20 * a33 - a23 * a30; + double b09 = a21 * a32 - a22 * a31; + double b10 = a21 * a33 - a23 * a31; + double b11 = a22 * a33 - a23 * a32; + + // Calculate the determinant + double determinant = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06; + if (outMatrix) { + double invdet = sk_ieee_double_divide(1.0, determinant); + b00 *= invdet; + b01 *= invdet; + b02 *= invdet; + b03 *= invdet; + b04 *= invdet; + b05 *= invdet; + b06 *= invdet; + b07 *= invdet; + b08 *= invdet; + b09 *= invdet; + b10 *= invdet; + b11 *= invdet; + + outMatrix[0] = a11 * b11 - a12 * b10 + a13 * b09; + outMatrix[1] = a02 * b10 - a01 * b11 - a03 * b09; + outMatrix[2] = a31 * b05 - a32 * b04 + a33 * b03; + outMatrix[3] = a22 * b04 - a21 * b05 - a23 * b03; + outMatrix[4] = a12 * b08 - a10 * b11 - a13 * b07; + outMatrix[5] = a00 * b11 - a02 * b08 + a03 * b07; + outMatrix[6] = a32 * b02 - a30 * b05 - a33 * b01; + outMatrix[7] = a20 * b05 - a22 * b02 + a23 * b01; + outMatrix[8] = a10 * b10 - a11 * b08 + a13 * b06; + outMatrix[9] = a01 * b08 - a00 * b10 - a03 * b06; + outMatrix[10] = a30 * b04 - a31 * b02 + a33 * b00; + outMatrix[11] = a21 * b02 - a20 * b04 - a23 * b00; + outMatrix[12] = a11 * b07 - a10 * b09 - a12 * b06; + outMatrix[13] = a00 * b09 - a01 * b07 + a02 * b06; + outMatrix[14] = a31 * b01 - a30 * b03 - a32 * b00; + outMatrix[15] = a20 * b03 - a21 * b01 + a22 * b00; + + // If 1/det overflows to infinity (i.e. det is denormalized) or any of the inverted matrix + // values is non-finite, return zero to indicate a non-invertible matrix. + if (!SkScalarsAreFinite(outMatrix, 16)) { + determinant = 0.0f; + } + } + return determinant; +} diff --git a/gfx/skia/skia/src/core/SkMatrixInvert.h b/gfx/skia/skia/src/core/SkMatrixInvert.h new file mode 100644 index 0000000000..eda4cb9044 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMatrixInvert.h @@ -0,0 +1,24 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMatrixInvert_DEFINED +#define SkMatrixInvert_DEFINED + +#include "include/core/SkScalar.h" + +/** + * Computes the inverse of `inMatrix`, passed in column-major order. + * `inMatrix` and `outMatrix` are allowed to point to the same array of scalars in memory. + * `outMatrix` is allowed to be null. + * The return value is the determinant of the input matrix. If zero is returned, the matrix was + * non-invertible, and `outMatrix` has been left in an indeterminate state. + */ +SkScalar SkInvert2x2Matrix(const SkScalar inMatrix[4], SkScalar outMatrix[4]); +SkScalar SkInvert3x3Matrix(const SkScalar inMatrix[9], SkScalar outMatrix[9]); +SkScalar SkInvert4x4Matrix(const SkScalar inMatrix[16], SkScalar outMatrix[16]); + +#endif diff --git a/gfx/skia/skia/src/core/SkMatrixPriv.h b/gfx/skia/skia/src/core/SkMatrixPriv.h new file mode 100644 index 0000000000..086d840a7b --- /dev/null +++ b/gfx/skia/skia/src/core/SkMatrixPriv.h @@ -0,0 +1,201 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMatrixPriv_DEFINE +#define SkMatrixPriv_DEFINE + +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "src/base/SkVx.h" + +#include +#include +struct SkPoint3; + +class SkMatrixPriv { +public: + enum { + // writeTo/readFromMemory will never return a value larger than this + kMaxFlattenSize = 9 * sizeof(SkScalar) + sizeof(uint32_t), + }; + + static size_t WriteToMemory(const SkMatrix& matrix, void* buffer) { + return matrix.writeToMemory(buffer); + } + + static size_t ReadFromMemory(SkMatrix* matrix, const void* buffer, size_t length) { + return matrix->readFromMemory(buffer, length); + } + + typedef SkMatrix::MapXYProc MapXYProc; + typedef SkMatrix::MapPtsProc MapPtsProc; + + + static MapPtsProc GetMapPtsProc(const SkMatrix& matrix) { + return SkMatrix::GetMapPtsProc(matrix.getType()); + } + + static MapXYProc GetMapXYProc(const SkMatrix& matrix) { + return SkMatrix::GetMapXYProc(matrix.getType()); + } + + /** + * Attempt to map the rect through the inverse of the matrix. If it is not invertible, + * then this returns false and dst is unchanged. + */ + static bool SK_WARN_UNUSED_RESULT InverseMapRect(const SkMatrix& mx, + SkRect* dst, const SkRect& src) { + if (mx.getType() <= SkMatrix::kTranslate_Mask) { + SkScalar tx = mx.getTranslateX(); + SkScalar ty = mx.getTranslateY(); + skvx::float4 trans(tx, ty, tx, ty); + (skvx::float4::Load(&src.fLeft) - trans).store(&dst->fLeft); + return true; + } + // Insert other special-cases here (e.g. scale+translate) + + // general case + SkMatrix inverse; + if (mx.invert(&inverse)) { + inverse.mapRect(dst, src); + return true; + } + return false; + } + + /** Maps count pts, skipping stride bytes to advance from one SkPoint to the next. + Points are mapped by multiplying each SkPoint by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, pt = | y | + | G H I | | 1 | + + each resulting pts SkPoint is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param mx matrix used to map the points + @param pts storage for mapped points + @param stride size of record starting with SkPoint, in bytes + @param count number of points to transform + */ + static void MapPointsWithStride(const SkMatrix& mx, SkPoint pts[], size_t stride, int count) { + SkASSERT(stride >= sizeof(SkPoint)); + SkASSERT(0 == stride % sizeof(SkScalar)); + + SkMatrix::TypeMask tm = mx.getType(); + + if (SkMatrix::kIdentity_Mask == tm) { + return; + } + if (SkMatrix::kTranslate_Mask == tm) { + const SkScalar tx = mx.getTranslateX(); + const SkScalar ty = mx.getTranslateY(); + skvx::float2 trans(tx, ty); + for (int i = 0; i < count; ++i) { + (skvx::float2::Load(&pts->fX) + trans).store(&pts->fX); + pts = (SkPoint*)((intptr_t)pts + stride); + } + return; + } + // Insert other special-cases here (e.g. scale+translate) + + // general case + SkMatrix::MapXYProc proc = mx.getMapXYProc(); + for (int i = 0; i < count; ++i) { + proc(mx, pts->fX, pts->fY, pts); + pts = (SkPoint*)((intptr_t)pts + stride); + } + } + + /** Maps src SkPoint array of length count to dst SkPoint array, skipping stride bytes + to advance from one SkPoint to the next. + Points are mapped by multiplying each SkPoint by SkMatrix. Given: + + | A B C | | x | + Matrix = | D E F |, src = | y | + | G H I | | 1 | + + each resulting dst SkPoint is computed as: + + |A B C| |x| Ax+By+C Dx+Ey+F + Matrix * pt = |D E F| |y| = |Ax+By+C Dx+Ey+F Gx+Hy+I| = ------- , ------- + |G H I| |1| Gx+Hy+I Gx+Hy+I + + @param mx matrix used to map the points + @param dst storage for mapped points + @param src points to transform + @param stride size of record starting with SkPoint, in bytes + @param count number of points to transform + */ + static void MapPointsWithStride(const SkMatrix& mx, SkPoint dst[], size_t dstStride, + const SkPoint src[], size_t srcStride, int count) { + SkASSERT(srcStride >= sizeof(SkPoint)); + SkASSERT(dstStride >= sizeof(SkPoint)); + SkASSERT(0 == srcStride % sizeof(SkScalar)); + SkASSERT(0 == dstStride % sizeof(SkScalar)); + for (int i = 0; i < count; ++i) { + mx.mapPoints(dst, src, 1); + src = (SkPoint*)((intptr_t)src + srcStride); + dst = (SkPoint*)((intptr_t)dst + dstStride); + } + } + + static void MapHomogeneousPointsWithStride(const SkMatrix& mx, SkPoint3 dst[], size_t dstStride, + const SkPoint3 src[], size_t srcStride, int count); + + static bool PostIDiv(SkMatrix* matrix, int divx, int divy) { + return matrix->postIDiv(divx, divy); + } + + static bool CheapEqual(const SkMatrix& a, const SkMatrix& b) { + return &a == &b || 0 == memcmp(a.fMat, b.fMat, sizeof(a.fMat)); + } + + static const SkScalar* M44ColMajor(const SkM44& m) { return m.fMat; } + + // This is legacy functionality that only checks the 3x3 portion. The matrix could have Z-based + // shear, or other complex behavior. Only use this if you're planning to use the information + // to accelerate some purely 2D operation. + static bool IsScaleTranslateAsM33(const SkM44& m) { + return m.rc(1,0) == 0 && m.rc(3,0) == 0 && + m.rc(0,1) == 0 && m.rc(3,1) == 0 && + m.rc(3,3) == 1; + + } + + // Map the four corners of 'r' and return the bounding box of those points. The four corners of + // 'r' are assumed to have z = 0 and w = 1. If the matrix has perspective, the returned + // rectangle will be the bounding box of the projected points after being clipped to w > 0. + static SkRect MapRect(const SkM44& m, const SkRect& r); + + // Returns the differential area scale factor for a local point 'p' that will be transformed + // by 'm' (which may have perspective). If 'm' does not have perspective, this scale factor is + // constant regardless of 'p'; when it does have perspective, it is specific to that point. + // + // This can be crudely thought of as "device pixel area" / "local pixel area" at 'p'. + // + // Returns positive infinity if the transformed homogeneous point has w <= 0. + static SkScalar DifferentialAreaScale(const SkMatrix& m, const SkPoint& p); + + // Determines if the transformation m applied to the bounds can be approximated by + // an affine transformation, i.e., the perspective part of the transformation has little + // visible effect. + static bool NearlyAffine(const SkMatrix& m, + const SkRect& bounds, + SkScalar tolerance = SK_ScalarNearlyZero); + + static SkScalar ComputeResScaleForStroking(const SkMatrix& matrix); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkMatrixProvider.h b/gfx/skia/skia/src/core/SkMatrixProvider.h new file mode 100644 index 0000000000..3dfa5676ba --- /dev/null +++ b/gfx/skia/skia/src/core/SkMatrixProvider.h @@ -0,0 +1,68 @@ +/* +* Copyright 2020 Google LLC +* +* Use of this source code is governed by a BSD-style license that can be +* found in the LICENSE file. +*/ + +#ifndef SkMatrixProvider_DEFINED +#define SkMatrixProvider_DEFINED + +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" + +/** + * All matrix providers report a flag: "localToDeviceHitsPixelCenters". This is confusing. + * It doesn't say anything about the actual matrix in the provider. Instead, it means: "is it safe + * to tweak sampling based on the contents of the matrix". In other words, does the device end of + * the local-to-device matrix actually map to pixels, AND are the local coordinates being fed to + * the shader produced by the inverse of that matrix? For a normal device, this is trivially true. + * The matrix may be updated via transforms, but when we draw (and the local coordinates come from + * rasterization of primitives against that device), we can know that the device coordinates will + * land on pixel centers. + * + * In a few places, the matrix provider is lying about how sampling "works". When we invoke a child + * from runtime effects, we give that child a matrix provider with an identity matrix. However -- + * the coordinates being passed to that child are not the result of device -> local transformed + * coordinates. Runtime effects can generate coordinates arbitrarily - even though the provider has + * an identity matrix, we can't assume it's safe to (for example) convert linear -> nearest. + * Clip shaders are similar - they overwrite the local-to-device matrix (to match what it was when + * the clip shader was inserted). The CTM continues to change before drawing, though. In that case, + * the two matrices are not inverses, so the local coordinates may not land on texel centers in + * the clip shader. + * + * In cases where we need to inhibit filtering optimizations, use SkOverrideDeviceMatrixProvider. + */ +class SkMatrixProvider { +public: + SkMatrixProvider(const SkMatrix& localToDevice) + : fLocalToDevice(localToDevice), fLocalToDevice33(localToDevice) {} + + SkMatrixProvider(const SkM44& localToDevice) + : fLocalToDevice(localToDevice), fLocalToDevice33(localToDevice.asM33()) {} + + // These should return the "same" matrix, as either a 3x3 or 4x4. Most sites in Skia still + // call localToDevice, and operate on SkMatrix. + const SkMatrix& localToDevice() const { return fLocalToDevice33; } + const SkM44& localToDevice44() const { return fLocalToDevice; } + +private: + friend class SkBaseDevice; + + SkM44 fLocalToDevice; + SkMatrix fLocalToDevice33; // Cached SkMatrix version of above, for legacy usage +}; + +class SkPostTranslateMatrixProvider : public SkMatrixProvider { +public: + SkPostTranslateMatrixProvider(const SkMatrixProvider& parent, SkScalar dx, SkScalar dy) + : SkMatrixProvider(SkM44::Translate(dx, dy) * parent.localToDevice44()) {} +}; + +class SkPreConcatMatrixProvider : public SkMatrixProvider { +public: + SkPreConcatMatrixProvider(const SkMatrixProvider& parent, const SkMatrix& preMatrix) + : SkMatrixProvider(parent.localToDevice44() * SkM44(preMatrix)) {} +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkMatrixUtils.h b/gfx/skia/skia/src/core/SkMatrixUtils.h new file mode 100644 index 0000000000..e6a9003bed --- /dev/null +++ b/gfx/skia/skia/src/core/SkMatrixUtils.h @@ -0,0 +1,39 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMatrixUtils_DEFINED +#define SkMatrixUtils_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkSize.h" + +class SkMatrix; +struct SkSamplingOptions; + +/** + * Given a matrix, size and an antialias setting, return true if the computed dst-rect + * would align such that there is a 1-to-1 coorspondence between src and dst pixels. + * This can be called by drawing code to see if drawBitmap can be turned into + * drawSprite (which is faster). + * + * The src-rect is defined to be { 0, 0, size.width(), size.height() } + */ +bool SkTreatAsSprite(const SkMatrix&, const SkISize& size, const SkSamplingOptions&, + bool isAntiAlias); + +/** Decomposes the upper-left 2x2 of the matrix into a rotation (represented by + the cosine and sine of the rotation angle), followed by a non-uniform scale, + followed by another rotation. If there is a reflection, one of the scale + factors will be negative. + Returns true if successful. Returns false if the matrix is degenerate. + */ +bool SkDecomposeUpper2x2(const SkMatrix& matrix, + SkPoint* rotation1, + SkPoint* scale, + SkPoint* rotation2); + +#endif diff --git a/gfx/skia/skia/src/core/SkMesh.cpp b/gfx/skia/skia/src/core/SkMesh.cpp new file mode 100644 index 0000000000..c31dfb78a9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMesh.cpp @@ -0,0 +1,925 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkMesh.h" + +#ifdef SK_ENABLE_SKSL +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/private/SkOpts_spi.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLProgramKind.h" +#include "include/private/base/SkMath.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkMeshPriv.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/SkSLUtil.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLReturnStatement.h" +#include "src/sksl/ir/SkSLStructDefinition.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrGpu.h" +#include "src/gpu/ganesh/GrStagingBufferManager.h" +#endif // defined(SK_GANESH) + +#include +#include +#include +#include +#include + +using Attribute = SkMeshSpecification::Attribute; +using Varying = SkMeshSpecification::Varying; + +using IndexBuffer = SkMesh::IndexBuffer; +using VertexBuffer = SkMesh::VertexBuffer; + +#define RETURN_FAILURE(...) return Result{nullptr, SkStringPrintf(__VA_ARGS__)} + +#define RETURN_ERROR(...) return std::make_tuple(false, SkStringPrintf(__VA_ARGS__)) + +#define RETURN_SUCCESS return std::make_tuple(true, SkString{}) + +using Uniform = SkMeshSpecification::Uniform; + +static std::vector::iterator find_uniform(std::vector& uniforms, + std::string_view name) { + return std::find_if(uniforms.begin(), uniforms.end(), + [name](const SkMeshSpecification::Uniform& u) { return u.name == name; }); +} + +static std::tuple +gather_uniforms_and_check_for_main(const SkSL::Program& program, + std::vector* uniforms, + SkMeshSpecification::Uniform::Flags stage, + size_t* offset) { + bool foundMain = false; + for (const SkSL::ProgramElement* elem : program.elements()) { + if (elem->is()) { + const SkSL::FunctionDefinition& defn = elem->as(); + const SkSL::FunctionDeclaration& decl = defn.declaration(); + if (decl.isMain()) { + foundMain = true; + } + } else if (elem->is()) { + const SkSL::GlobalVarDeclaration& global = elem->as(); + const SkSL::VarDeclaration& varDecl = global.declaration()->as(); + const SkSL::Variable& var = *varDecl.var(); + if (var.modifiers().fFlags & SkSL::Modifiers::kUniform_Flag) { + auto iter = find_uniform(*uniforms, var.name()); + const auto& context = *program.fContext; + if (iter == uniforms->end()) { + uniforms->push_back(SkRuntimeEffectPriv::VarAsUniform(var, context, offset)); + uniforms->back().flags |= stage; + } else { + // Check that the two declarations are equivalent + size_t ignoredOffset = 0; + auto uniform = SkRuntimeEffectPriv::VarAsUniform(var, context, &ignoredOffset); + if (uniform.isArray() != iter->isArray() || + uniform.type != iter->type || + uniform.count != iter->count) { + return {false, SkStringPrintf("Uniform %.*s declared with different types" + " in vertex and fragment shaders.", + (int)iter->name.size(), iter->name.data())}; + } + if (uniform.isColor() != iter->isColor()) { + return {false, SkStringPrintf("Uniform %.*s declared with different color" + " layout in vertex and fragment shaders.", + (int)iter->name.size(), iter->name.data())}; + } + (*iter).flags |= stage; + } + } + } + } + if (!foundMain) { + return {false, SkString("No main function found.")}; + } + return {true, {}}; +} + +using ColorType = SkMeshSpecificationPriv::ColorType; + +ColorType get_fs_color_type(const SkSL::Program& fsProgram) { + for (const SkSL::ProgramElement* elem : fsProgram.elements()) { + if (elem->is()) { + const SkSL::FunctionDefinition& defn = elem->as(); + const SkSL::FunctionDeclaration& decl = defn.declaration(); + if (decl.isMain()) { + SkASSERT(decl.parameters().size() == 1 || decl.parameters().size() == 2); + if (decl.parameters().size() == 1) { + return ColorType::kNone; + } + const SkSL::Type& paramType = decl.parameters()[1]->type(); + SkASSERT(paramType.matches(*fsProgram.fContext->fTypes.fHalf4) || + paramType.matches(*fsProgram.fContext->fTypes.fFloat4)); + return paramType.matches(*fsProgram.fContext->fTypes.fHalf4) ? ColorType::kHalf4 + : ColorType::kFloat4; + } + } + } + SkUNREACHABLE; +} + +// This is a non-exhaustive check for the validity of a variable name. The SkSL compiler will +// actually process the name. We're just guarding against having multiple tokens embedded in the +// name before we put it into a struct definition. +static bool check_name(const SkString& name) { + if (name.isEmpty()) { + return false; + } + for (size_t i = 0; i < name.size(); ++i) { + if (name[i] != '_' && !std::isalnum(name[i], std::locale::classic())) { + return false; + } + } + return true; +} + +static size_t attribute_type_size(Attribute::Type type) { + switch (type) { + case Attribute::Type::kFloat: return 4; + case Attribute::Type::kFloat2: return 2*4; + case Attribute::Type::kFloat3: return 3*4; + case Attribute::Type::kFloat4: return 4*4; + case Attribute::Type::kUByte4_unorm: return 4; + } + SkUNREACHABLE; +} + +static const char* attribute_type_string(Attribute::Type type) { + switch (type) { + case Attribute::Type::kFloat: return "float"; + case Attribute::Type::kFloat2: return "float2"; + case Attribute::Type::kFloat3: return "float3"; + case Attribute::Type::kFloat4: return "float4"; + case Attribute::Type::kUByte4_unorm: return "half4"; + } + SkUNREACHABLE; +} + +static const char* varying_type_string(Varying::Type type) { + switch (type) { + case Varying::Type::kFloat: return "float"; + case Varying::Type::kFloat2: return "float2"; + case Varying::Type::kFloat3: return "float3"; + case Varying::Type::kFloat4: return "float4"; + case Varying::Type::kHalf: return "half"; + case Varying::Type::kHalf2: return "half2"; + case Varying::Type::kHalf3: return "half3"; + case Varying::Type::kHalf4: return "half4"; + } + SkUNREACHABLE; +} + +std::tuple +check_vertex_offsets_and_stride(SkSpan attributes, + size_t stride) { + // Vulkan 1.0 has a minimum maximum attribute count of 2048. + static_assert(SkMeshSpecification::kMaxStride <= 2048); + // ES 2 has a max of 8. + static_assert(SkMeshSpecification::kMaxAttributes <= 8); + // Four bytes alignment is required by Metal. + static_assert(SkMeshSpecification::kStrideAlignment >= 4); + static_assert(SkMeshSpecification::kOffsetAlignment >= 4); + // ES2 has a minimum maximum of 8. We may need one for a broken gl_FragCoord workaround and + // one for local coords. + static_assert(SkMeshSpecification::kMaxVaryings <= 6); + + if (attributes.empty()) { + RETURN_ERROR("At least 1 attribute is required."); + } + if (attributes.size() > SkMeshSpecification::kMaxAttributes) { + RETURN_ERROR("A maximum of %zu attributes is allowed.", + SkMeshSpecification::kMaxAttributes); + } + static_assert(SkIsPow2(SkMeshSpecification::kStrideAlignment)); + if (stride == 0 || stride & (SkMeshSpecification::kStrideAlignment - 1)) { + RETURN_ERROR("Vertex stride must be a non-zero multiple of %zu.", + SkMeshSpecification::kStrideAlignment); + } + if (stride > SkMeshSpecification::kMaxStride) { + RETURN_ERROR("Stride cannot exceed %zu.", SkMeshSpecification::kMaxStride); + } + for (const auto& a : attributes) { + if (a.offset & (SkMeshSpecification::kOffsetAlignment - 1)) { + RETURN_ERROR("Attribute offset must be a multiple of %zu.", + SkMeshSpecification::kOffsetAlignment); + } + // This equivalent to vertexAttributeAccessBeyondStride==VK_FALSE in + // VK_KHR_portability_subset. First check is to avoid overflow in second check. + if (a.offset >= stride || a.offset + attribute_type_size(a.type) > stride) { + RETURN_ERROR("Attribute offset plus size cannot exceed stride."); + } + } + RETURN_SUCCESS; +} + +int check_for_passthrough_local_coords_and_dead_varyings(const SkSL::Program& fsProgram, + uint32_t* deadVaryingMask) { + SkASSERT(deadVaryingMask); + + using namespace SkSL; + static constexpr int kFailed = -2; + + class Visitor final : public SkSL::ProgramVisitor { + public: + Visitor(const Context& context) : fContext(context) {} + + void visit(const Program& program) { ProgramVisitor::visit(program); } + + int passthroughFieldIndex() const { return fPassthroughFieldIndex; } + + uint32_t fieldUseMask() const { return fFieldUseMask; } + + protected: + bool visitProgramElement(const ProgramElement& p) override { + if (p.is()) { + const auto& def = p.as(); + if (def.type().name() == "Varyings") { + fVaryingsType = &def.type(); + } + // No reason to keep looking at this type definition. + return false; + } + if (p.is() && p.as().declaration().isMain()) { + SkASSERT(!fVaryings); + fVaryings = p.as().declaration().parameters()[0]; + + SkASSERT(fVaryingsType && fVaryingsType->matches(fVaryings->type())); + + fInMain = true; + bool result = ProgramVisitor::visitProgramElement(p); + fInMain = false; + return result; + } + return ProgramVisitor::visitProgramElement(p); + } + + bool visitStatement(const Statement& s) override { + if (!fInMain) { + return ProgramVisitor::visitStatement(s); + } + // We should only get here if are in main and therefore found the varyings parameter. + SkASSERT(fVaryings); + SkASSERT(fVaryingsType); + + if (fPassthroughFieldIndex == kFailed) { + // We've already determined there are return statements that aren't passthrough + // or return different fields. + return ProgramVisitor::visitStatement(s); + } + if (!s.is()) { + return ProgramVisitor::visitStatement(s); + } + + // We just detect simple cases like "return varyings.foo;" + const auto& rs = s.as(); + SkASSERT(rs.expression()); + if (!rs.expression()->is()) { + this->passthroughFailed(); + return ProgramVisitor::visitStatement(s); + } + const auto& fa = rs.expression()->as(); + if (!fa.base()->is()) { + this->passthroughFailed(); + return ProgramVisitor::visitStatement(s); + } + const auto& baseRef = fa.base()->as(); + if (baseRef.variable() != fVaryings) { + this->passthroughFailed(); + return ProgramVisitor::visitStatement(s); + } + if (fPassthroughFieldIndex >= 0) { + // We already found an OK return statement. Check if this one returns the same + // field. + if (fa.fieldIndex() != fPassthroughFieldIndex) { + this->passthroughFailed(); + return ProgramVisitor::visitStatement(s); + } + // We don't call our base class here because we don't want to hit visitExpression + // and mark the returned field as used. + return false; + } + const Type::Field& field = fVaryings->type().fields()[fa.fieldIndex()]; + if (!field.fType->matches(*fContext.fTypes.fFloat2)) { + this->passthroughFailed(); + return ProgramVisitor::visitStatement(s); + } + fPassthroughFieldIndex = fa.fieldIndex(); + // We don't call our base class here because we don't want to hit visitExpression and + // mark the returned field as used. + return false; + } + + bool visitExpression(const Expression& e) override { + // Anything before the Varyings struct is defined doesn't matter. + if (!fVaryingsType) { + return false; + } + if (!e.is()) { + return ProgramVisitor::visitExpression(e); + } + const auto& fa = e.as(); + if (!fa.base()->type().matches(*fVaryingsType)) { + return ProgramVisitor::visitExpression(e); + } + fFieldUseMask |= 1 << fa.fieldIndex(); + return false; + } + + private: + void passthroughFailed() { + if (fPassthroughFieldIndex >= 0) { + fFieldUseMask |= 1 << fPassthroughFieldIndex; + } + fPassthroughFieldIndex = kFailed; + } + + const Context& fContext; + const Type* fVaryingsType = nullptr; + const Variable* fVaryings = nullptr; + int fPassthroughFieldIndex = -1; + bool fInMain = false; + uint32_t fFieldUseMask = 0; + }; + + Visitor v(*fsProgram.fContext); + v.visit(fsProgram); + *deadVaryingMask = ~v.fieldUseMask(); + return v.passthroughFieldIndex(); +} + +SkMeshSpecification::Result SkMeshSpecification::Make(SkSpan attributes, + size_t vertexStride, + SkSpan varyings, + const SkString& vs, + const SkString& fs) { + return Make(attributes, + vertexStride, + varyings, + vs, + fs, + SkColorSpace::MakeSRGB(), + kPremul_SkAlphaType); +} + +SkMeshSpecification::Result SkMeshSpecification::Make(SkSpan attributes, + size_t vertexStride, + SkSpan varyings, + const SkString& vs, + const SkString& fs, + sk_sp cs) { + return Make(attributes, vertexStride, varyings, vs, fs, std::move(cs), kPremul_SkAlphaType); +} + +SkMeshSpecification::Result SkMeshSpecification::Make(SkSpan attributes, + size_t vertexStride, + SkSpan varyings, + const SkString& vs, + const SkString& fs, + sk_sp cs, + SkAlphaType at) { + SkString attributesStruct("struct Attributes {\n"); + for (const auto& a : attributes) { + attributesStruct.appendf(" %s %s;\n", attribute_type_string(a.type), a.name.c_str()); + } + attributesStruct.append("};\n"); + + bool userProvidedPositionVarying = false; + for (const auto& v : varyings) { + if (v.name.equals("position")) { + if (v.type != Varying::Type::kFloat2) { + return {nullptr, SkString("Varying \"position\" must have type float2.")}; + } + userProvidedPositionVarying = true; + } + } + + SkSTArray tempVaryings; + if (!userProvidedPositionVarying) { + // Even though we check the # of varyings in MakeFromSourceWithStructs we check here, too, + // to avoid overflow with + 1. + if (varyings.size() > kMaxVaryings - 1) { + RETURN_FAILURE("A maximum of %zu varyings is allowed.", kMaxVaryings); + } + for (const auto& v : varyings) { + tempVaryings.push_back(v); + } + tempVaryings.push_back(Varying{Varying::Type::kFloat2, SkString("position")}); + varyings = tempVaryings; + } + + SkString varyingStruct("struct Varyings {\n"); + for (const auto& v : varyings) { + varyingStruct.appendf(" %s %s;\n", varying_type_string(v.type), v.name.c_str()); + } + varyingStruct.append("};\n"); + + SkString fullVS; + fullVS.append(varyingStruct.c_str()); + fullVS.append(attributesStruct.c_str()); + fullVS.append(vs.c_str()); + + SkString fullFS; + fullFS.append(varyingStruct.c_str()); + fullFS.append(fs.c_str()); + + return MakeFromSourceWithStructs(attributes, + vertexStride, + varyings, + fullVS, + fullFS, + std::move(cs), + at); +} + +SkMeshSpecification::Result SkMeshSpecification::MakeFromSourceWithStructs( + SkSpan attributes, + size_t stride, + SkSpan varyings, + const SkString& vs, + const SkString& fs, + sk_sp cs, + SkAlphaType at) { + if (auto [ok, error] = check_vertex_offsets_and_stride(attributes, stride); !ok) { + return {nullptr, error}; + } + + for (const auto& a : attributes) { + if (!check_name(a.name)) { + RETURN_FAILURE("\"%s\" is not a valid attribute name.", a.name.c_str()); + } + } + + if (varyings.size() > kMaxVaryings) { + RETURN_FAILURE("A maximum of %zu varyings is allowed.", kMaxVaryings); + } + + for (const auto& v : varyings) { + if (!check_name(v.name)) { + return {nullptr, SkStringPrintf("\"%s\" is not a valid varying name.", v.name.c_str())}; + } + } + + std::vector uniforms; + size_t offset = 0; + + SkSL::Compiler compiler(SkSL::ShaderCapsFactory::Standalone()); + + // Disable memory pooling; this might slow down compilation slightly, but it will ensure that a + // long-lived mesh specification doesn't waste memory. + SkSL::ProgramSettings settings; + settings.fUseMemoryPool = false; + + // TODO(skia:11209): Add SkCapabilities to the API, check against required version. + std::unique_ptr vsProgram = compiler.convertProgram( + SkSL::ProgramKind::kMeshVertex, + std::string(vs.c_str()), + settings); + if (!vsProgram) { + RETURN_FAILURE("VS: %s", compiler.errorText().c_str()); + } + + if (auto [result, error] = gather_uniforms_and_check_for_main( + *vsProgram, + &uniforms, + SkMeshSpecification::Uniform::Flags::kVertex_Flag, + &offset); + !result) { + return {nullptr, std::move(error)}; + } + + if (SkSL::Analysis::CallsColorTransformIntrinsics(*vsProgram)) { + RETURN_FAILURE("Color transform intrinsics are not permitted in custom mesh shaders"); + } + + std::unique_ptr fsProgram = compiler.convertProgram( + SkSL::ProgramKind::kMeshFragment, + std::string(fs.c_str()), + settings); + + if (!fsProgram) { + RETURN_FAILURE("FS: %s", compiler.errorText().c_str()); + } + + if (auto [result, error] = gather_uniforms_and_check_for_main( + *fsProgram, + &uniforms, + SkMeshSpecification::Uniform::Flags::kFragment_Flag, + &offset); + !result) { + return {nullptr, std::move(error)}; + } + + if (SkSL::Analysis::CallsColorTransformIntrinsics(*fsProgram)) { + RETURN_FAILURE("Color transform intrinsics are not permitted in custom mesh shaders"); + } + + ColorType ct = get_fs_color_type(*fsProgram); + + if (ct == ColorType::kNone) { + cs = nullptr; + at = kPremul_SkAlphaType; + } else { + if (!cs) { + return {nullptr, SkString{"Must provide a color space if FS returns a color."}}; + } + if (at == kUnknown_SkAlphaType) { + return {nullptr, SkString{"Must provide a valid alpha type if FS returns a color."}}; + } + } + + uint32_t deadVaryingMask; + int passthroughLocalCoordsVaryingIndex = + check_for_passthrough_local_coords_and_dead_varyings(*fsProgram, &deadVaryingMask); + + if (passthroughLocalCoordsVaryingIndex >= 0) { + SkASSERT(varyings[passthroughLocalCoordsVaryingIndex].type == Varying::Type::kFloat2); + } + + return {sk_sp(new SkMeshSpecification(attributes, + stride, + varyings, + passthroughLocalCoordsVaryingIndex, + deadVaryingMask, + std::move(uniforms), + std::move(vsProgram), + std::move(fsProgram), + ct, + std::move(cs), + at)), + /*error=*/{}}; +} + +SkMeshSpecification::~SkMeshSpecification() = default; + +SkMeshSpecification::SkMeshSpecification( + SkSpan attributes, + size_t stride, + SkSpan varyings, + int passthroughLocalCoordsVaryingIndex, + uint32_t deadVaryingMask, + std::vector uniforms, + std::unique_ptr vs, + std::unique_ptr fs, + ColorType ct, + sk_sp cs, + SkAlphaType at) + : fAttributes(attributes.begin(), attributes.end()) + , fVaryings(varyings.begin(), varyings.end()) + , fUniforms(std::move(uniforms)) + , fVS(std::move(vs)) + , fFS(std::move(fs)) + , fStride(stride) + , fPassthroughLocalCoordsVaryingIndex(passthroughLocalCoordsVaryingIndex) + , fDeadVaryingMask(deadVaryingMask) + , fColorType(ct) + , fColorSpace(std::move(cs)) + , fAlphaType(at) { + fHash = SkOpts::hash_fn(fVS->fSource->c_str(), fVS->fSource->size(), 0); + fHash = SkOpts::hash_fn(fFS->fSource->c_str(), fFS->fSource->size(), fHash); + + // The attributes and varyings SkSL struct declarations are included in the program source. + // However, the attribute offsets and types need to be included, the latter because the SkSL + // struct definition has the GPU type but not the CPU data format. + for (const auto& a : fAttributes) { + fHash = SkOpts::hash_fn(&a.offset, sizeof(a.offset), fHash); + fHash = SkOpts::hash_fn(&a.type, sizeof(a.type), fHash); + } + + fHash = SkOpts::hash_fn(&stride, sizeof(stride), fHash); + + uint64_t csHash = fColorSpace ? fColorSpace->hash() : 0; + fHash = SkOpts::hash_fn(&csHash, sizeof(csHash), fHash); + + auto atInt = static_cast(fAlphaType); + fHash = SkOpts::hash_fn(&atInt, sizeof(atInt), fHash); +} + +size_t SkMeshSpecification::uniformSize() const { + return fUniforms.empty() ? 0 + : SkAlign4(fUniforms.back().offset + fUniforms.back().sizeInBytes()); +} + +const Uniform* SkMeshSpecification::findUniform(std::string_view name) const { + auto iter = std::find_if(fUniforms.begin(), fUniforms.end(), [name] (const Uniform& u) { + return u.name == name; + }); + return iter == fUniforms.end() ? nullptr : &(*iter); +} + +const Attribute* SkMeshSpecification::findAttribute(std::string_view name) const { + auto iter = std::find_if(fAttributes.begin(), fAttributes.end(), [name](const Attribute& a) { + return name.compare(a.name.c_str()) == 0; + }); + return iter == fAttributes.end() ? nullptr : &(*iter); +} + +const Varying* SkMeshSpecification::findVarying(std::string_view name) const { + auto iter = std::find_if(fVaryings.begin(), fVaryings.end(), [name](const Varying& v) { + return name.compare(v.name.c_str()) == 0; + }); + return iter == fVaryings.end() ? nullptr : &(*iter); +} + +////////////////////////////////////////////////////////////////////////////// + +SkMesh::SkMesh() = default; +SkMesh::~SkMesh() = default; + +SkMesh::SkMesh(const SkMesh&) = default; +SkMesh::SkMesh(SkMesh&&) = default; + +SkMesh& SkMesh::operator=(const SkMesh&) = default; +SkMesh& SkMesh::operator=(SkMesh&&) = default; + +sk_sp SkMesh::MakeIndexBuffer(GrDirectContext* dc, const void* data, size_t size) { + if (!dc) { + return SkMeshPriv::CpuIndexBuffer::Make(data, size); + } +#if defined(SK_GANESH) + return SkMeshPriv::GpuIndexBuffer::Make(dc, data, size); +#else + return nullptr; +#endif +} + +sk_sp SkMesh::CopyIndexBuffer(GrDirectContext* dc, sk_sp src) { + if (!src) { + return nullptr; + } + auto* ib = static_cast(src.get()); + const void* data = ib->peek(); + if (!data) { + return nullptr; + } + return MakeIndexBuffer(dc, data, ib->size()); +} + +sk_sp SkMesh::MakeVertexBuffer(GrDirectContext* dc, const void* data, size_t size) { + if (!dc) { + return SkMeshPriv::CpuVertexBuffer::Make(data, size); + } +#if defined(SK_GANESH) + return SkMeshPriv::GpuVertexBuffer::Make(dc, data, size); +#else + return nullptr; +#endif +} + +sk_sp SkMesh::CopyVertexBuffer(GrDirectContext* dc, sk_sp src) { + if (!src) { + return nullptr; + } + auto* vb = static_cast(src.get()); + const void* data = vb->peek(); + if (!data) { + return nullptr; + } + return MakeVertexBuffer(dc, data, vb->size()); +} + +SkMesh::Result SkMesh::Make(sk_sp spec, + Mode mode, + sk_sp vb, + size_t vertexCount, + size_t vertexOffset, + sk_sp uniforms, + const SkRect& bounds) { + SkMesh mesh; + mesh.fSpec = std::move(spec); + mesh.fMode = mode; + mesh.fVB = std::move(vb); + mesh.fUniforms = std::move(uniforms); + mesh.fVCount = vertexCount; + mesh.fVOffset = vertexOffset; + mesh.fBounds = bounds; + auto [valid, msg] = mesh.validate(); + if (!valid) { + mesh = {}; + } + return {std::move(mesh), std::move(msg)}; +} + +SkMesh::Result SkMesh::MakeIndexed(sk_sp spec, + Mode mode, + sk_sp vb, + size_t vertexCount, + size_t vertexOffset, + sk_sp ib, + size_t indexCount, + size_t indexOffset, + sk_sp uniforms, + const SkRect& bounds) { + if (!ib) { + // We check this before calling validate to disambiguate from a non-indexed mesh where + // IB is expected to be null. + return {{}, SkString{"An index buffer is required."}}; + } + SkMesh mesh; + mesh.fSpec = std::move(spec); + mesh.fMode = mode; + mesh.fVB = std::move(vb); + mesh.fVCount = vertexCount; + mesh.fVOffset = vertexOffset; + mesh.fIB = std::move(ib); + mesh.fUniforms = std::move(uniforms); + mesh.fICount = indexCount; + mesh.fIOffset = indexOffset; + mesh.fBounds = bounds; + auto [valid, msg] = mesh.validate(); + if (!valid) { + mesh = {}; + } + return {std::move(mesh), std::move(msg)}; +} + +bool SkMesh::isValid() const { + bool valid = SkToBool(fSpec); + SkASSERT(valid == std::get<0>(this->validate())); + return valid; +} + +static size_t min_vcount_for_mode(SkMesh::Mode mode) { + switch (mode) { + case SkMesh::Mode::kTriangles: return 3; + case SkMesh::Mode::kTriangleStrip: return 3; + } + SkUNREACHABLE; +} + +std::tuple SkMesh::validate() const { +#define FAIL_MESH_VALIDATE(...) return std::make_tuple(false, SkStringPrintf(__VA_ARGS__)) + if (!fSpec) { + FAIL_MESH_VALIDATE("SkMeshSpecification is required."); + } + + if (!fVB) { + FAIL_MESH_VALIDATE("A vertex buffer is required."); + } + + auto vb = static_cast(fVB.get()); + auto ib = static_cast(fIB.get()); + + SkSafeMath sm; + size_t vsize = sm.mul(fSpec->stride(), fVCount); + if (sm.add(vsize, fVOffset) > vb->size()) { + FAIL_MESH_VALIDATE("The vertex buffer offset and vertex count reads beyond the end of the" + " vertex buffer."); + } + + if (fVOffset%fSpec->stride() != 0) { + FAIL_MESH_VALIDATE("The vertex offset (%zu) must be a multiple of the vertex stride (%zu).", + fVOffset, + fSpec->stride()); + } + + if (size_t uniformSize = fSpec->uniformSize()) { + if (!fUniforms || fUniforms->size() < uniformSize) { + FAIL_MESH_VALIDATE("The uniform data is %zu bytes but must be at least %zu.", + fUniforms->size(), + uniformSize); + } + } + + auto modeToStr = [](Mode m) { + switch (m) { + case Mode::kTriangles: return "triangles"; + case Mode::kTriangleStrip: return "triangle-strip"; + } + SkUNREACHABLE; + }; + if (ib) { + if (fICount < min_vcount_for_mode(fMode)) { + FAIL_MESH_VALIDATE("%s mode requires at least %zu indices but index count is %zu.", + modeToStr(fMode), + min_vcount_for_mode(fMode), + fICount); + } + size_t isize = sm.mul(sizeof(uint16_t), fICount); + if (sm.add(isize, fIOffset) > ib->size()) { + FAIL_MESH_VALIDATE("The index buffer offset and index count reads beyond the end of the" + " index buffer."); + + } + // If we allow 32 bit indices then this should enforce 4 byte alignment in that case. + if (!SkIsAlign2(fIOffset)) { + FAIL_MESH_VALIDATE("The index offset must be a multiple of 2."); + } + } else { + if (fVCount < min_vcount_for_mode(fMode)) { + FAIL_MESH_VALIDATE("%s mode requires at least %zu vertices but vertex count is %zu.", + modeToStr(fMode), + min_vcount_for_mode(fMode), + fICount); + } + SkASSERT(!fICount); + SkASSERT(!fIOffset); + } + + if (!sm.ok()) { + FAIL_MESH_VALIDATE("Overflow"); + } +#undef FAIL_MESH_VALIDATE + return {true, {}}; +} + +////////////////////////////////////////////////////////////////////////////// + +static inline bool check_update(const void* data, size_t offset, size_t size, size_t bufferSize) { + SkSafeMath sm; + return data && + size && + SkIsAlign4(offset) && + SkIsAlign4(size) && + sm.add(offset, size) <= bufferSize && + sm.ok(); +} + +bool SkMesh::IndexBuffer::update(GrDirectContext* dc, + const void* data, + size_t offset, + size_t size) { + return check_update(data, offset, size, this->size()) && this->onUpdate(dc, data, offset, size); +} + +bool SkMesh::VertexBuffer::update(GrDirectContext* dc, + const void* data, + size_t offset, + size_t size) { + return check_update(data, offset, size, this->size()) && this->onUpdate(dc, data, offset, size); +} + +#if defined(SK_GANESH) +bool SkMeshPriv::UpdateGpuBuffer(GrDirectContext* dc, + sk_sp buffer, + const void* data, + size_t offset, + size_t size) { + if (!dc || dc != buffer->getContext()) { + return false; + } + SkASSERT(!dc->abandoned()); // If dc is abandoned then buffer->getContext() should be null. + + if (!dc->priv().caps()->transferFromBufferToBufferSupport()) { + auto ownedData = SkData::MakeWithCopy(data, size); + dc->priv().drawingManager()->newBufferUpdateTask(std::move(ownedData), + std::move(buffer), + offset); + return true; + } + + sk_sp tempBuffer; + size_t tempOffset = 0; + if (auto* sbm = dc->priv().getGpu()->stagingBufferManager()) { + auto alignment = dc->priv().caps()->transferFromBufferToBufferAlignment(); + auto [sliceBuffer, sliceOffset, ptr] = sbm->allocateStagingBufferSlice(size, alignment); + if (sliceBuffer) { + std::memcpy(ptr, data, size); + tempBuffer.reset(SkRef(sliceBuffer)); + tempOffset = sliceOffset; + } + } + + if (!tempBuffer) { + tempBuffer = dc->priv().resourceProvider()->createBuffer(size, + GrGpuBufferType::kXferCpuToGpu, + kDynamic_GrAccessPattern, + GrResourceProvider::ZeroInit::kNo); + if (!tempBuffer) { + return false; + } + if (!tempBuffer->updateData(data, 0, size, /*preserve=*/false)) { + return false; + } + } + + dc->priv().drawingManager()->newBufferTransferTask(std::move(tempBuffer), + tempOffset, + std::move(buffer), + offset, + size); + + return true; +} +#endif // defined(SK_GANESH) + +#endif // SK_ENABLE_SKSL diff --git a/gfx/skia/skia/src/core/SkMeshPriv.h b/gfx/skia/skia/src/core/SkMeshPriv.h new file mode 100644 index 0000000000..a4f50e9bc4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMeshPriv.h @@ -0,0 +1,250 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMeshPriv_DEFINED +#define SkMeshPriv_DEFINED + +#include "include/core/SkMesh.h" + +#ifdef SK_ENABLE_SKSL +#include "include/core/SkData.h" +#include "src/core/SkSLTypeShared.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrDirectContext.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrDrawingManager.h" +#include "src/gpu/ganesh/GrGpuBuffer.h" +#include "src/gpu/ganesh/GrResourceCache.h" +#include "src/gpu/ganesh/GrResourceProvider.h" +#endif + +struct SkMeshSpecificationPriv { + using Varying = SkMeshSpecification::Varying; + using Attribute = SkMeshSpecification::Attribute; + using ColorType = SkMeshSpecification::ColorType; + + static SkSpan Varyings(const SkMeshSpecification& spec) { + return SkSpan(spec.fVaryings); + } + + static const SkSL::Program* VS(const SkMeshSpecification& spec) { return spec.fVS.get(); } + static const SkSL::Program* FS(const SkMeshSpecification& spec) { return spec.fFS.get(); } + + static int Hash(const SkMeshSpecification& spec) { return spec.fHash; } + + static ColorType GetColorType(const SkMeshSpecification& spec) { return spec.fColorType; } + static bool HasColors(const SkMeshSpecification& spec) { + return GetColorType(spec) != ColorType::kNone; + } + + static SkColorSpace* ColorSpace(const SkMeshSpecification& spec) { + return spec.fColorSpace.get(); + } + + static SkAlphaType AlphaType(const SkMeshSpecification& spec) { return spec.fAlphaType; } + + static SkSLType VaryingTypeAsSLType(Varying::Type type) { + switch (type) { + case Varying::Type::kFloat: return SkSLType::kFloat; + case Varying::Type::kFloat2: return SkSLType::kFloat2; + case Varying::Type::kFloat3: return SkSLType::kFloat3; + case Varying::Type::kFloat4: return SkSLType::kFloat4; + case Varying::Type::kHalf: return SkSLType::kHalf; + case Varying::Type::kHalf2: return SkSLType::kHalf2; + case Varying::Type::kHalf3: return SkSLType::kHalf3; + case Varying::Type::kHalf4: return SkSLType::kHalf4; + } + SkUNREACHABLE; + } + +#if defined(SK_GANESH) + static GrVertexAttribType AttrTypeAsVertexAttribType(Attribute::Type type) { + switch (type) { + case Attribute::Type::kFloat: return kFloat_GrVertexAttribType; + case Attribute::Type::kFloat2: return kFloat2_GrVertexAttribType; + case Attribute::Type::kFloat3: return kFloat3_GrVertexAttribType; + case Attribute::Type::kFloat4: return kFloat4_GrVertexAttribType; + case Attribute::Type::kUByte4_unorm: return kUByte4_norm_GrVertexAttribType; + } + SkUNREACHABLE; + } +#endif + + static SkSLType AttrTypeAsSLType(Attribute::Type type) { + switch (type) { + case Attribute::Type::kFloat: return SkSLType::kFloat; + case Attribute::Type::kFloat2: return SkSLType::kFloat2; + case Attribute::Type::kFloat3: return SkSLType::kFloat3; + case Attribute::Type::kFloat4: return SkSLType::kFloat4; + case Attribute::Type::kUByte4_unorm: return SkSLType::kHalf4; + } + SkUNREACHABLE; + } + + static int PassthroughLocalCoordsVaryingIndex(const SkMeshSpecification& spec) { + return spec.fPassthroughLocalCoordsVaryingIndex; + } + + /** + * A varying is dead if it is never referenced OR it is only referenced as a passthrough for + * local coordinates. In the latter case it's index will returned as + * PassthroughLocalCoordsVaryingIndex. Our analysis is not very sophisticated so this is + * determined conservatively. + */ + static bool VaryingIsDead(const SkMeshSpecification& spec, int v) { + SkASSERT(v >= 0 && SkToSizeT(v) < spec.fVaryings.size()); + return (1 << v) & spec.fDeadVaryingMask; + } +}; + +struct SkMeshPriv { + class Buffer { + public: + virtual ~Buffer() = 0; + + Buffer() = default; + Buffer(const Buffer&) = delete; + + Buffer& operator=(const Buffer&) = delete; + + virtual const void* peek() const { return nullptr; } + +#if defined(SK_GANESH) + virtual sk_sp asGpuBuffer() const { return nullptr; } +#endif + }; + + class IB : public Buffer, public SkMesh::IndexBuffer {}; + class VB : public Buffer, public SkMesh::VertexBuffer {}; + + template class CpuBuffer final : public Base { + public: + ~CpuBuffer() override = default; + + static sk_sp Make(const void* data, size_t size); + + const void* peek() const override { return fData->data(); } + + size_t size() const override { return fData->size(); } + + private: + CpuBuffer(sk_sp data) : fData(std::move(data)) {} + + bool onUpdate(GrDirectContext*, const void* data, size_t offset, size_t size) override; + + sk_sp fData; + }; + + using CpuIndexBuffer = CpuBuffer; + using CpuVertexBuffer = CpuBuffer; + +#if defined(SK_GANESH) + template class GpuBuffer final : public Base { + public: + GpuBuffer() = default; + + ~GpuBuffer() override; + + static sk_sp Make(GrDirectContext*, const void* data, size_t size); + + sk_sp asGpuBuffer() const override { return fBuffer; } + + size_t size() const override { return fBuffer->size(); } + + private: + bool onUpdate(GrDirectContext*, const void* data, size_t offset, size_t size) override; + + sk_sp fBuffer; + GrDirectContext::DirectContextID fContextID; + }; + + using GpuIndexBuffer = GpuBuffer; + using GpuVertexBuffer = GpuBuffer; +#endif // defined(SK_GANESH) + +private: +#if defined(SK_GANESH) + static bool UpdateGpuBuffer(GrDirectContext*, + sk_sp, + const void*, + size_t offset, + size_t size); +#endif +}; + +inline SkMeshPriv::Buffer::~Buffer() = default; + +template sk_sp SkMeshPriv::CpuBuffer::Make(const void* data, + size_t size) { + SkASSERT(size); + sk_sp storage; + if (data) { + storage = SkData::MakeWithCopy(data, size); + } else { + storage = SkData::MakeZeroInitialized(size); + } + return sk_sp(new CpuBuffer(std::move(storage))); +} + +template bool SkMeshPriv::CpuBuffer::onUpdate(GrDirectContext* dc, + const void* data, + size_t offset, + size_t size) { + if (dc) { + return false; + } + std::memcpy(SkTAddOffset(fData->writable_data(), offset), data, size); + return true; +} + +#if defined(SK_GANESH) + +template SkMeshPriv::GpuBuffer::~GpuBuffer() { + GrResourceCache::ReturnResourceFromThread(std::move(fBuffer), fContextID); +} + +template +sk_sp SkMeshPriv::GpuBuffer::Make(GrDirectContext* dc, + const void* data, + size_t size) { + SkASSERT(dc); + + sk_sp buffer = dc->priv().resourceProvider()->createBuffer( + size, + Type, + kStatic_GrAccessPattern, + data ? GrResourceProvider::ZeroInit::kNo : GrResourceProvider::ZeroInit::kYes); + if (!buffer) { + return nullptr; + } + + if (data && !buffer->updateData(data, 0, size, /*preserve=*/false)) { + return nullptr; + } + + auto result = new GpuBuffer; + result->fBuffer = std::move(buffer); + result->fContextID = dc->directContextID(); + return sk_sp(result); +} + + +template +bool SkMeshPriv::GpuBuffer::onUpdate(GrDirectContext* dc, + const void* data, + size_t offset, + size_t size) { + return UpdateGpuBuffer(dc, fBuffer, data, offset, size); +} + +#endif // defined(SK_GANESH) + +#endif // SK_ENABLE_SKSL + +#endif diff --git a/gfx/skia/skia/src/core/SkMessageBus.h b/gfx/skia/skia/src/core/SkMessageBus.h new file mode 100644 index 0000000000..3b78793da6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMessageBus.h @@ -0,0 +1,153 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMessageBus_DEFINED +#define SkMessageBus_DEFINED + +#include + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" + +/** + * The following method must have a specialization for type 'Message': + * + * bool SkShouldPostMessageToBus(const Message&, IDType msgBusUniqueID) + * + * We may want to consider providing a default template implementation, to avoid this requirement by + * sending to all inboxes when the specialization for type 'Message' is not present. + */ +template +class SkMessageBus : SkNoncopyable { +public: + template struct is_sk_sp : std::false_type {}; + template struct is_sk_sp> : std::true_type {}; + + // We want to make sure the caller of Post() method will not keep a ref or copy of the message, + // so the message type must be sk_sp or non copyable. + static_assert(AllowCopyableMessage || is_sk_sp::value || + !std::is_copy_constructible::value, + "The message type must be sk_sp or non copyable."); + + // Post a message to be received by Inboxes for this Message type. Checks + // SkShouldPostMessageToBus() for each inbox. Threadsafe. + static void Post(Message m); + + class Inbox { + public: + Inbox(IDType uniqueID); + ~Inbox(); + + IDType uniqueID() const { return fUniqueID; } + + // Overwrite out with all the messages we've received since the last call. Threadsafe. + void poll(skia_private::TArray* out); + + private: + skia_private::TArray fMessages; + SkMutex fMessagesMutex; + const IDType fUniqueID; + + friend class SkMessageBus; + void receive(Message m); // SkMessageBus is a friend only to call this. + }; + +private: + SkMessageBus(); + static SkMessageBus* Get(); + + SkTDArray fInboxes; + SkMutex fInboxesMutex; +}; + +// This must go in a single .cpp file, not some .h, or we risk creating more than one global +// SkMessageBus per type when using shared libraries. NOTE: at most one per file will compile. +#define DECLARE_SKMESSAGEBUS_MESSAGE(Message, IDType, AllowCopyableMessage) \ + template <> \ + SkMessageBus* \ + SkMessageBus::Get() { \ + static SkOnce once; \ + static SkMessageBus* bus; \ + once([] { bus = new SkMessageBus(); }); \ + return bus; \ + } + +// ----------------------- Implementation of SkMessageBus::Inbox ----------------------- + +template +SkMessageBus::Inbox::Inbox(IDType uniqueID) + : fUniqueID(uniqueID) { + // Register ourselves with the corresponding message bus. + auto* bus = SkMessageBus::Get(); + SkAutoMutexExclusive lock(bus->fInboxesMutex); + bus->fInboxes.push_back(this); +} + +template +SkMessageBus::Inbox::~Inbox() { + // Remove ourselves from the corresponding message bus. + auto* bus = SkMessageBus::Get(); + SkAutoMutexExclusive lock(bus->fInboxesMutex); + // This is a cheaper fInboxes.remove(fInboxes.find(this)) when order doesn't matter. + for (int i = 0; i < bus->fInboxes.size(); i++) { + if (this == bus->fInboxes[i]) { + bus->fInboxes.removeShuffle(i); + break; + } + } +} + +template +void SkMessageBus::Inbox::receive(Message m) { + SkAutoMutexExclusive lock(fMessagesMutex); + fMessages.push_back(std::move(m)); +} + +template +void SkMessageBus::Inbox::poll( + skia_private::TArray* messages) { + SkASSERT(messages); + messages->clear(); + SkAutoMutexExclusive lock(fMessagesMutex); + fMessages.swap(*messages); +} + +// ----------------------- Implementation of SkMessageBus ----------------------- + +template +SkMessageBus::SkMessageBus() = default; + +template +/*static*/ void SkMessageBus::Post(Message m) { + auto* bus = SkMessageBus::Get(); + SkAutoMutexExclusive lock(bus->fInboxesMutex); + for (int i = 0; i < bus->fInboxes.size(); i++) { + if (SkShouldPostMessageToBus(m, bus->fInboxes[i]->fUniqueID)) { + if constexpr (AllowCopyableMessage) { + bus->fInboxes[i]->receive(m); + } else { + if constexpr (is_sk_sp::value) { + SkASSERT(m->unique()); + } + bus->fInboxes[i]->receive(std::move(m)); + break; + } + } + } + + if constexpr (is_sk_sp::value && !AllowCopyableMessage) { + // Make sure sk_sp has been sent to an inbox. + SkASSERT(!m); // NOLINT(bugprone-use-after-move) + } +} + +#endif // SkMessageBus_DEFINED diff --git a/gfx/skia/skia/src/core/SkMipmap.cpp b/gfx/skia/skia/src/core/SkMipmap.cpp new file mode 100644 index 0000000000..3cc9b7ce46 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMipmap.cpp @@ -0,0 +1,895 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkTypes.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkHalf.h" +#include "src/base/SkMathPriv.h" +#include "src/base/SkVx.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkMipmapBuilder.h" +#include + +// +// ColorTypeFilter is the "Type" we pass to some downsample template functions. +// It controls how we expand a pixel into a large type, with space between each component, +// so we can then perform our simple filter (either box or triangle) and store the intermediates +// in the expanded type. +// + +struct ColorTypeFilter_8888 { + typedef uint32_t Type; + static skvx::Vec<4, uint16_t> Expand(uint32_t x) { + return skvx::cast(skvx::byte4::Load(&x)); + } + static uint32_t Compact(const skvx::Vec<4, uint16_t>& x) { + uint32_t r; + skvx::cast(x).store(&r); + return r; + } +}; + +struct ColorTypeFilter_565 { + typedef uint16_t Type; + static uint32_t Expand(uint16_t x) { + return (x & ~SK_G16_MASK_IN_PLACE) | ((x & SK_G16_MASK_IN_PLACE) << 16); + } + static uint16_t Compact(uint32_t x) { + return ((x & ~SK_G16_MASK_IN_PLACE) & 0xFFFF) | ((x >> 16) & SK_G16_MASK_IN_PLACE); + } +}; + +struct ColorTypeFilter_4444 { + typedef uint16_t Type; + static uint32_t Expand(uint16_t x) { + return (x & 0xF0F) | ((x & ~0xF0F) << 12); + } + static uint16_t Compact(uint32_t x) { + return (x & 0xF0F) | ((x >> 12) & ~0xF0F); + } +}; + +struct ColorTypeFilter_8 { + typedef uint8_t Type; + static unsigned Expand(unsigned x) { + return x; + } + static uint8_t Compact(unsigned x) { + return (uint8_t)x; + } +}; + +struct ColorTypeFilter_Alpha_F16 { + typedef uint16_t Type; + static skvx::float4 Expand(uint16_t x) { + return SkHalfToFloat_finite_ftz((uint64_t) x); // expand out to four lanes + + } + static uint16_t Compact(const skvx::float4& x) { + uint64_t r; + SkFloatToHalf_finite_ftz(x).store(&r); + return r & 0xFFFF; // but ignore the extra 3 here + } +}; + +struct ColorTypeFilter_RGBA_F16 { + typedef uint64_t Type; // SkHalf x4 + static skvx::float4 Expand(uint64_t x) { + return SkHalfToFloat_finite_ftz(x); + } + static uint64_t Compact(const skvx::float4& x) { + uint64_t r; + SkFloatToHalf_finite_ftz(x).store(&r); + return r; + } +}; + +struct ColorTypeFilter_88 { + typedef uint16_t Type; + static uint32_t Expand(uint16_t x) { + return (x & 0xFF) | ((x & ~0xFF) << 8); + } + static uint16_t Compact(uint32_t x) { + return (x & 0xFF) | ((x >> 8) & ~0xFF); + } +}; + +struct ColorTypeFilter_1616 { + typedef uint32_t Type; + static uint64_t Expand(uint32_t x) { + return (x & 0xFFFF) | ((x & ~0xFFFF) << 16); + } + static uint16_t Compact(uint64_t x) { + return (x & 0xFFFF) | ((x >> 16) & ~0xFFFF); + } +}; + +struct ColorTypeFilter_F16F16 { + typedef uint32_t Type; + static skvx::float4 Expand(uint32_t x) { + return SkHalfToFloat_finite_ftz((uint64_t) x); // expand out to four lanes + } + static uint32_t Compact(const skvx::float4& x) { + uint64_t r; + SkFloatToHalf_finite_ftz(x).store(&r); + return (uint32_t) (r & 0xFFFFFFFF); // but ignore the extra 2 here + } +}; + +struct ColorTypeFilter_16161616 { + typedef uint64_t Type; + static skvx::Vec<4, uint32_t> Expand(uint64_t x) { + return skvx::cast(skvx::Vec<4, uint16_t>::Load(&x)); + } + static uint64_t Compact(const skvx::Vec<4, uint32_t>& x) { + uint64_t r; + skvx::cast(x).store(&r); + return r; + } +}; + +struct ColorTypeFilter_16 { + typedef uint16_t Type; + static uint32_t Expand(uint16_t x) { + return x; + } + static uint16_t Compact(uint32_t x) { + return (uint16_t) x; + } +}; + +struct ColorTypeFilter_1010102 { + typedef uint32_t Type; + static uint64_t Expand(uint64_t x) { + return (((x ) & 0x3ff) ) | + (((x >> 10) & 0x3ff) << 20) | + (((x >> 20) & 0x3ff) << 40) | + (((x >> 30) & 0x3 ) << 60); + } + static uint32_t Compact(uint64_t x) { + return (((x ) & 0x3ff) ) | + (((x >> 20) & 0x3ff) << 10) | + (((x >> 40) & 0x3ff) << 20) | + (((x >> 60) & 0x3 ) << 30); + } +}; + +template T add_121(const T& a, const T& b, const T& c) { + return a + b + b + c; +} + +template T shift_right(const T& x, int bits) { + return x >> bits; +} + +skvx::float4 shift_right(const skvx::float4& x, int bits) { + return x * (1.0f / (1 << bits)); +} + +template T shift_left(const T& x, int bits) { + return x << bits; +} + +skvx::float4 shift_left(const skvx::float4& x, int bits) { + return x * (1 << bits); +} + +// +// To produce each mip level, we need to filter down by 1/2 (e.g. 100x100 -> 50,50) +// If the starting dimension is odd, we floor the size of the lower level (e.g. 101 -> 50) +// In those (odd) cases, we use a triangle filter, with 1-pixel overlap between samplings, +// else for even cases, we just use a 2x box filter. +// +// This produces 4 possible isotropic filters: 2x2 2x3 3x2 3x3 where WxH indicates the number of +// src pixels we need to sample in each dimension to produce 1 dst pixel. +// +// OpenGL expects a full mipmap stack to contain anisotropic space as well. +// This means a 100x1 image would continue down to a 50x1 image, 25x1 image... +// Because of this, we need 4 more anisotropic filters: 1x2, 1x3, 2x1, 3x1. + +template void downsample_1_2(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto p1 = (const typename F::Type*)((const char*)p0 + srcRB); + auto d = static_cast(dst); + + for (int i = 0; i < count; ++i) { + auto c00 = F::Expand(p0[0]); + auto c10 = F::Expand(p1[0]); + + auto c = c00 + c10; + d[i] = F::Compact(shift_right(c, 1)); + p0 += 2; + p1 += 2; + } +} + +template void downsample_1_3(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto p1 = (const typename F::Type*)((const char*)p0 + srcRB); + auto p2 = (const typename F::Type*)((const char*)p1 + srcRB); + auto d = static_cast(dst); + + for (int i = 0; i < count; ++i) { + auto c00 = F::Expand(p0[0]); + auto c10 = F::Expand(p1[0]); + auto c20 = F::Expand(p2[0]); + + auto c = add_121(c00, c10, c20); + d[i] = F::Compact(shift_right(c, 2)); + p0 += 2; + p1 += 2; + p2 += 2; + } +} + +template void downsample_2_1(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto d = static_cast(dst); + + for (int i = 0; i < count; ++i) { + auto c00 = F::Expand(p0[0]); + auto c01 = F::Expand(p0[1]); + + auto c = c00 + c01; + d[i] = F::Compact(shift_right(c, 1)); + p0 += 2; + } +} + +template void downsample_2_2(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto p1 = (const typename F::Type*)((const char*)p0 + srcRB); + auto d = static_cast(dst); + + for (int i = 0; i < count; ++i) { + auto c00 = F::Expand(p0[0]); + auto c01 = F::Expand(p0[1]); + auto c10 = F::Expand(p1[0]); + auto c11 = F::Expand(p1[1]); + + auto c = c00 + c10 + c01 + c11; + d[i] = F::Compact(shift_right(c, 2)); + p0 += 2; + p1 += 2; + } +} + +template void downsample_2_3(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto p1 = (const typename F::Type*)((const char*)p0 + srcRB); + auto p2 = (const typename F::Type*)((const char*)p1 + srcRB); + auto d = static_cast(dst); + + for (int i = 0; i < count; ++i) { + auto c00 = F::Expand(p0[0]); + auto c01 = F::Expand(p0[1]); + auto c10 = F::Expand(p1[0]); + auto c11 = F::Expand(p1[1]); + auto c20 = F::Expand(p2[0]); + auto c21 = F::Expand(p2[1]); + + auto c = add_121(c00, c10, c20) + add_121(c01, c11, c21); + d[i] = F::Compact(shift_right(c, 3)); + p0 += 2; + p1 += 2; + p2 += 2; + } +} + +template void downsample_3_1(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto d = static_cast(dst); + + auto c02 = F::Expand(p0[0]); + for (int i = 0; i < count; ++i) { + auto c00 = c02; + auto c01 = F::Expand(p0[1]); + c02 = F::Expand(p0[2]); + + auto c = add_121(c00, c01, c02); + d[i] = F::Compact(shift_right(c, 2)); + p0 += 2; + } +} + +template void downsample_3_2(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto p1 = (const typename F::Type*)((const char*)p0 + srcRB); + auto d = static_cast(dst); + + // Given pixels: + // a0 b0 c0 d0 e0 ... + // a1 b1 c1 d1 e1 ... + // We want: + // (a0 + 2*b0 + c0 + a1 + 2*b1 + c1) / 8 + // (c0 + 2*d0 + e0 + c1 + 2*d1 + e1) / 8 + // ... + + auto c0 = F::Expand(p0[0]); + auto c1 = F::Expand(p1[0]); + auto c = c0 + c1; + for (int i = 0; i < count; ++i) { + auto a = c; + + auto b0 = F::Expand(p0[1]); + auto b1 = F::Expand(p1[1]); + auto b = b0 + b0 + b1 + b1; + + c0 = F::Expand(p0[2]); + c1 = F::Expand(p1[2]); + c = c0 + c1; + + auto sum = a + b + c; + d[i] = F::Compact(shift_right(sum, 3)); + p0 += 2; + p1 += 2; + } +} + +template void downsample_3_3(void* dst, const void* src, size_t srcRB, int count) { + SkASSERT(count > 0); + auto p0 = static_cast(src); + auto p1 = (const typename F::Type*)((const char*)p0 + srcRB); + auto p2 = (const typename F::Type*)((const char*)p1 + srcRB); + auto d = static_cast(dst); + + // Given pixels: + // a0 b0 c0 d0 e0 ... + // a1 b1 c1 d1 e1 ... + // a2 b2 c2 d2 e2 ... + // We want: + // (a0 + 2*b0 + c0 + 2*a1 + 4*b1 + 2*c1 + a2 + 2*b2 + c2) / 16 + // (c0 + 2*d0 + e0 + 2*c1 + 4*d1 + 2*e1 + c2 + 2*d2 + e2) / 16 + // ... + + auto c0 = F::Expand(p0[0]); + auto c1 = F::Expand(p1[0]); + auto c2 = F::Expand(p2[0]); + auto c = add_121(c0, c1, c2); + for (int i = 0; i < count; ++i) { + auto a = c; + + auto b0 = F::Expand(p0[1]); + auto b1 = F::Expand(p1[1]); + auto b2 = F::Expand(p2[1]); + auto b = shift_left(add_121(b0, b1, b2), 1); + + c0 = F::Expand(p0[2]); + c1 = F::Expand(p1[2]); + c2 = F::Expand(p2[2]); + c = add_121(c0, c1, c2); + + auto sum = a + b + c; + d[i] = F::Compact(shift_right(sum, 4)); + p0 += 2; + p1 += 2; + p2 += 2; + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkMipmap::SkMipmap(void* malloc, size_t size) : SkCachedData(malloc, size) {} +SkMipmap::SkMipmap(size_t size, SkDiscardableMemory* dm) : SkCachedData(size, dm) {} + +SkMipmap::~SkMipmap() = default; + +size_t SkMipmap::AllocLevelsSize(int levelCount, size_t pixelSize) { + if (levelCount < 0) { + return 0; + } + int64_t size = sk_64_mul(levelCount + 1, sizeof(Level)) + pixelSize; + if (!SkTFitsIn(size)) { + return 0; + } + return SkTo(size); +} + +SkMipmap* SkMipmap::Build(const SkPixmap& src, SkDiscardableFactoryProc fact, + bool computeContents) { + typedef void FilterProc(void*, const void* srcPtr, size_t srcRB, int count); + + FilterProc* proc_1_2 = nullptr; + FilterProc* proc_1_3 = nullptr; + FilterProc* proc_2_1 = nullptr; + FilterProc* proc_2_2 = nullptr; + FilterProc* proc_2_3 = nullptr; + FilterProc* proc_3_1 = nullptr; + FilterProc* proc_3_2 = nullptr; + FilterProc* proc_3_3 = nullptr; + + const SkColorType ct = src.colorType(); + const SkAlphaType at = src.alphaType(); + + switch (ct) { + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kRGB_565_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kARGB_4444_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kAlpha_8_SkColorType: + case kGray_8_SkColorType: + case kR8_unorm_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kR8G8_unorm_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kR16G16_unorm_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kA16_unorm_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kRGBA_1010102_SkColorType: + case kBGRA_1010102_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kA16_float_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kR16G16_float_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + case kR16G16B16A16_unorm_SkColorType: + proc_1_2 = downsample_1_2; + proc_1_3 = downsample_1_3; + proc_2_1 = downsample_2_1; + proc_2_2 = downsample_2_2; + proc_2_3 = downsample_2_3; + proc_3_1 = downsample_3_1; + proc_3_2 = downsample_3_2; + proc_3_3 = downsample_3_3; + break; + + case kUnknown_SkColorType: + case kRGB_888x_SkColorType: // TODO: use 8888? + case kRGB_101010x_SkColorType: // TODO: use 1010102? + case kBGR_101010x_SkColorType: // TODO: use 1010102? + case kBGR_101010x_XR_SkColorType: // TODO: use 1010102? + case kRGBA_F32_SkColorType: + return nullptr; + + case kSRGBA_8888_SkColorType: // TODO: needs careful handling + return nullptr; + } + + if (src.width() <= 1 && src.height() <= 1) { + return nullptr; + } + // whip through our loop to compute the exact size needed + size_t size = 0; + int countLevels = ComputeLevelCount(src.width(), src.height()); + for (int currentMipLevel = countLevels; currentMipLevel >= 0; currentMipLevel--) { + SkISize mipSize = ComputeLevelSize(src.width(), src.height(), currentMipLevel); + size += SkColorTypeMinRowBytes(ct, mipSize.fWidth) * mipSize.fHeight; + } + + size_t storageSize = SkMipmap::AllocLevelsSize(countLevels, size); + if (0 == storageSize) { + return nullptr; + } + + SkMipmap* mipmap; + if (fact) { + SkDiscardableMemory* dm = fact(storageSize); + if (nullptr == dm) { + return nullptr; + } + mipmap = new SkMipmap(storageSize, dm); + } else { + mipmap = new SkMipmap(sk_malloc_throw(storageSize), storageSize); + } + + // init + mipmap->fCS = sk_ref_sp(src.info().colorSpace()); + mipmap->fCount = countLevels; + mipmap->fLevels = (Level*)mipmap->writable_data(); + SkASSERT(mipmap->fLevels); + + Level* levels = mipmap->fLevels; + uint8_t* baseAddr = (uint8_t*)&levels[countLevels]; + uint8_t* addr = baseAddr; + int width = src.width(); + int height = src.height(); + uint32_t rowBytes; + SkPixmap srcPM(src); + + // Depending on architecture and other factors, the pixel data alignment may need to be as + // large as 8 (for F16 pixels). See the comment on SkMipmap::Level. + SkASSERT(SkIsAlign8((uintptr_t)addr)); + + for (int i = 0; i < countLevels; ++i) { + FilterProc* proc; + if (height & 1) { + if (height == 1) { // src-height is 1 + if (width & 1) { // src-width is 3 + proc = proc_3_1; + } else { // src-width is 2 + proc = proc_2_1; + } + } else { // src-height is 3 + if (width & 1) { + if (width == 1) { // src-width is 1 + proc = proc_1_3; + } else { // src-width is 3 + proc = proc_3_3; + } + } else { // src-width is 2 + proc = proc_2_3; + } + } + } else { // src-height is 2 + if (width & 1) { + if (width == 1) { // src-width is 1 + proc = proc_1_2; + } else { // src-width is 3 + proc = proc_3_2; + } + } else { // src-width is 2 + proc = proc_2_2; + } + } + width = std::max(1, width >> 1); + height = std::max(1, height >> 1); + rowBytes = SkToU32(SkColorTypeMinRowBytes(ct, width)); + + // We make the Info w/o any colorspace, since that storage is not under our control, and + // will not be deleted in a controlled fashion. When the caller is given the pixmap for + // a given level, we augment this pixmap with fCS (which we do manage). + new (&levels[i].fPixmap) SkPixmap(SkImageInfo::Make(width, height, ct, at), addr, rowBytes); + levels[i].fScale = SkSize::Make(SkIntToScalar(width) / src.width(), + SkIntToScalar(height) / src.height()); + + const SkPixmap& dstPM = levels[i].fPixmap; + if (computeContents) { + const void* srcBasePtr = srcPM.addr(); + void* dstBasePtr = dstPM.writable_addr(); + + const size_t srcRB = srcPM.rowBytes(); + for (int y = 0; y < height; y++) { + proc(dstBasePtr, srcBasePtr, srcRB, width); + srcBasePtr = (char*)srcBasePtr + srcRB * 2; // jump two rows + dstBasePtr = (char*)dstBasePtr + dstPM.rowBytes(); + } + } + srcPM = dstPM; + addr += height * rowBytes; + } + SkASSERT(addr == baseAddr + size); + + SkASSERT(mipmap->fLevels); + return mipmap; +} + +int SkMipmap::ComputeLevelCount(int baseWidth, int baseHeight) { + if (baseWidth < 1 || baseHeight < 1) { + return 0; + } + + // OpenGL's spec requires that each mipmap level have height/width equal to + // max(1, floor(original_height / 2^i) + // (or original_width) where i is the mipmap level. + // Continue scaling down until both axes are size 1. + + const int largestAxis = std::max(baseWidth, baseHeight); + if (largestAxis < 2) { + // SkMipmap::Build requires a minimum size of 2. + return 0; + } + const int leadingZeros = SkCLZ(static_cast(largestAxis)); + // If the value 00011010 has 3 leading 0s then it has 5 significant bits + // (the bits which are not leading zeros) + const int significantBits = (sizeof(uint32_t) * 8) - leadingZeros; + // This is making the assumption that the size of a byte is 8 bits + // and that sizeof(uint32_t)'s implementation-defined behavior is 4. + int mipLevelCount = significantBits; + + // SkMipmap does not include the base mip level. + // For example, it contains levels 1-x instead of 0-x. + // This is because the image used to create SkMipmap is the base level. + // So subtract 1 from the mip level count. + if (mipLevelCount > 0) { + --mipLevelCount; + } + + return mipLevelCount; +} + +SkISize SkMipmap::ComputeLevelSize(int baseWidth, int baseHeight, int level) { + if (baseWidth < 1 || baseHeight < 1) { + return SkISize::Make(0, 0); + } + + int maxLevelCount = ComputeLevelCount(baseWidth, baseHeight); + if (level >= maxLevelCount || level < 0) { + return SkISize::Make(0, 0); + } + // OpenGL's spec requires that each mipmap level have height/width equal to + // max(1, floor(original_height / 2^i) + // (or original_width) where i is the mipmap level. + + // SkMipmap does not include the base mip level. + // For example, it contains levels 1-x instead of 0-x. + // This is because the image used to create SkMipmap is the base level. + // So subtract 1 from the mip level to get the index stored by SkMipmap. + int width = std::max(1, baseWidth >> (level + 1)); + int height = std::max(1, baseHeight >> (level + 1)); + + return SkISize::Make(width, height); +} + +/////////////////////////////////////////////////////////////////////////////// + +// Returns fractional level value. floor(level) is the index of the larger level. +// < 0 means failure. +float SkMipmap::ComputeLevel(SkSize scaleSize) { + SkASSERT(scaleSize.width() >= 0 && scaleSize.height() >= 0); + +#ifndef SK_SUPPORT_LEGACY_ANISOTROPIC_MIPMAP_SCALE + // Use the smallest scale to match the GPU impl. + const float scale = std::min(scaleSize.width(), scaleSize.height()); +#else + // Ideally we'd pick the smaller scale, to match Ganesh. But ignoring one of the + // scales can produce some atrocious results, so for now we use the geometric mean. + // (https://bugs.chromium.org/p/skia/issues/detail?id=4863) + const float scale = sk_float_sqrt(scaleSize.width() * scaleSize.height()); +#endif + + if (scale >= SK_Scalar1 || scale <= 0 || !SkScalarIsFinite(scale)) { + return -1; + } + + // The -0.5 bias here is to emulate GPU's sharpen mipmap option. + float L = std::max(-SkScalarLog2(scale) - 0.5f, 0.f); + if (!SkScalarIsFinite(L)) { + return -1; + } + return L; +} + +bool SkMipmap::extractLevel(SkSize scaleSize, Level* levelPtr) const { + if (nullptr == fLevels) { + return false; + } + + float L = ComputeLevel(scaleSize); + int level = sk_float_round2int(L); + if (level <= 0) { + return false; + } + + if (level > fCount) { + level = fCount; + } + if (levelPtr) { + *levelPtr = fLevels[level - 1]; + // need to augment with our colorspace + levelPtr->fPixmap.setColorSpace(fCS); + } + return true; +} + +bool SkMipmap::validForRootLevel(const SkImageInfo& root) const { + if (nullptr == fLevels) { + return false; + } + + const SkISize dimension = root.dimensions(); + if (dimension.width() <= 1 && dimension.height() <= 1) { + return false; + } + + if (fLevels[0].fPixmap. width() != std::max(1, dimension. width() >> 1) || + fLevels[0].fPixmap.height() != std::max(1, dimension.height() >> 1)) { + return false; + } + + for (int i = 0; i < this->countLevels(); ++i) { + if (fLevels[i].fPixmap.colorType() != root.colorType() || + fLevels[i].fPixmap.alphaType() != root.alphaType()) { + return false; + } + } + return true; +} + +// Helper which extracts a pixmap from the src bitmap +// +SkMipmap* SkMipmap::Build(const SkBitmap& src, SkDiscardableFactoryProc fact) { + SkPixmap srcPixmap; + if (!src.peekPixels(&srcPixmap)) { + return nullptr; + } + return Build(srcPixmap, fact); +} + +int SkMipmap::countLevels() const { + return fCount; +} + +bool SkMipmap::getLevel(int index, Level* levelPtr) const { + if (nullptr == fLevels) { + return false; + } + if (index < 0) { + return false; + } + if (index > fCount - 1) { + return false; + } + if (levelPtr) { + *levelPtr = fLevels[index]; + // need to augment with our colorspace + levelPtr->fPixmap.setColorSpace(fCS); + } + return true; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +#include "include/core/SkImageGenerator.h" +#include "include/core/SkStream.h" +#include "include/encode/SkPngEncoder.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +static sk_sp encode_to_data(const SkPixmap& pm) { + SkDynamicMemoryWStream stream; + if (SkPngEncoder::Encode(&stream, pm, SkPngEncoder::Options())) { + return stream.detachAsData(); + } + return nullptr; +} + +/* Format + count_levels:32 + for each level, starting with the biggest (index 0 in our iterator) + encoded_size:32 + encoded_data (padded) + */ +sk_sp SkMipmap::serialize() const { + const int count = this->countLevels(); + + SkBinaryWriteBuffer buffer; + buffer.write32(count); + for (int i = 0; i < count; ++i) { + Level level; + if (this->getLevel(i, &level)) { + buffer.writeDataAsByteArray(encode_to_data(level.fPixmap).get()); + } else { + return nullptr; + } + } + return buffer.snapshotAsData(); +} + +bool SkMipmap::Deserialize(SkMipmapBuilder* builder, const void* data, size_t length) { + SkReadBuffer buffer(data, length); + + int count = buffer.read32(); + if (builder->countLevels() != count) { + return false; + } + for (int i = 0; i < count; ++i) { + size_t size = buffer.read32(); + const void* ptr = buffer.skip(size); + if (!ptr) { + return false; + } + auto gen = SkImageGenerator::MakeFromEncoded( + SkData::MakeWithProc(ptr, size, nullptr, nullptr)); + if (!gen) { + return false; + } + + SkPixmap pm = builder->level(i); + if (gen->getInfo().dimensions() != pm.dimensions()) { + return false; + } + if (!gen->getPixels(pm)) { + return false; + } + } + return buffer.isValid(); +} diff --git a/gfx/skia/skia/src/core/SkMipmap.h b/gfx/skia/skia/src/core/SkMipmap.h new file mode 100644 index 0000000000..5e1ad63faa --- /dev/null +++ b/gfx/skia/skia/src/core/SkMipmap.h @@ -0,0 +1,96 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMipmap_DEFINED +#define SkMipmap_DEFINED + +#include "include/core/SkPixmap.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "src/core/SkCachedData.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/shaders/SkShaderBase.h" + +class SkBitmap; +class SkData; +class SkDiscardableMemory; +class SkMipmapBuilder; + +typedef SkDiscardableMemory* (*SkDiscardableFactoryProc)(size_t bytes); + +/* + * SkMipmap will generate mipmap levels when given a base mipmap level image. + * + * Any function which deals with mipmap levels indices will start with index 0 + * being the first mipmap level which was generated. Said another way, it does + * not include the base level in its range. + */ +class SkMipmap : public SkCachedData { +public: + ~SkMipmap() override; + // Allocate and fill-in a mipmap. If computeContents is false, we just allocated + // and compute the sizes/rowbytes, but leave the pixel-data uninitialized. + static SkMipmap* Build(const SkPixmap& src, SkDiscardableFactoryProc, + bool computeContents = true); + + static SkMipmap* Build(const SkBitmap& src, SkDiscardableFactoryProc); + + // Determines how many levels a SkMipmap will have without creating that mipmap. + // This does not include the base mipmap level that the user provided when + // creating the SkMipmap. + static int ComputeLevelCount(int baseWidth, int baseHeight); + static int ComputeLevelCount(SkISize s) { return ComputeLevelCount(s.width(), s.height()); } + + // Determines the size of a given mipmap level. + // |level| is an index into the generated mipmap levels. It does not include + // the base level. So index 0 represents mipmap level 1. + static SkISize ComputeLevelSize(int baseWidth, int baseHeight, int level); + + // Computes the fractional level based on the scaling in X and Y. + static float ComputeLevel(SkSize scaleSize); + + // We use a block of (possibly discardable) memory to hold an array of Level structs, followed + // by the pixel data for each level. On 32-bit platforms, Level would naturally be 4 byte + // aligned, so the pixel data could end up with 4 byte alignment. If the pixel data is F16, + // it must be 8 byte aligned. To ensure this, keep the Level struct 8 byte aligned as well. + struct alignas(8) Level { + SkPixmap fPixmap; + SkSize fScale; // < 1.0 + }; + + bool extractLevel(SkSize scale, Level*) const; + + // countLevels returns the number of mipmap levels generated (which does not + // include the base mipmap level). + int countLevels() const; + + // |index| is an index into the generated mipmap levels. It does not include + // the base level. So index 0 represents mipmap level 1. + bool getLevel(int index, Level*) const; + + bool validForRootLevel(const SkImageInfo&) const; + + sk_sp serialize() const; + static bool Deserialize(SkMipmapBuilder*, const void* data, size_t size); + +protected: + void onDataChange(void* oldData, void* newData) override { + fLevels = (Level*)newData; // could be nullptr + } + +private: + sk_sp fCS; + Level* fLevels; // managed by the baseclass, may be null due to onDataChanged. + int fCount; + + SkMipmap(void* malloc, size_t size); + SkMipmap(size_t size, SkDiscardableMemory* dm); + + static size_t AllocLevelsSize(int levelCount, size_t pixelSize); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkMipmapAccessor.cpp b/gfx/skia/skia/src/core/SkMipmapAccessor.cpp new file mode 100644 index 0000000000..c6f64a30f5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMipmapAccessor.cpp @@ -0,0 +1,110 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkMatrix.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkMipmapAccessor.h" +#include "src/image/SkImage_Base.h" + +// Try to load from the base image, or from the cache +static sk_sp try_load_mips(const SkImage_Base* image) { + sk_sp mips = image->refMips(); + if (!mips) { + mips.reset(SkMipmapCache::FindAndRef(SkBitmapCacheDesc::Make(image))); + } + if (!mips) { + mips.reset(SkMipmapCache::AddAndRef(image)); + } + return mips; +} + +SkMipmapAccessor::SkMipmapAccessor(const SkImage_Base* image, const SkMatrix& inv, + SkMipmapMode requestedMode) { + SkMipmapMode resolvedMode = requestedMode; + fLowerWeight = 0; + + auto load_upper_from_base = [&]() { + // only do this once + if (fBaseStorage.getPixels() == nullptr) { + auto dContext = as_IB(image)->directContext(); + (void)image->getROPixels(dContext, &fBaseStorage); + fUpper.reset(fBaseStorage.info(), fBaseStorage.getPixels(), fBaseStorage.rowBytes()); + } + }; + + float level = 0; + if (requestedMode != SkMipmapMode::kNone) { + SkSize scale; + if (!inv.decomposeScale(&scale, nullptr)) { + resolvedMode = SkMipmapMode::kNone; + } else { + level = SkMipmap::ComputeLevel({1/scale.width(), 1/scale.height()}); + if (level <= 0) { + resolvedMode = SkMipmapMode::kNone; + level = 0; + } + } + } + + auto scale = [image](const SkPixmap& pm) { + return SkMatrix::Scale(SkIntToScalar(pm.width()) / image->width(), + SkIntToScalar(pm.height()) / image->height()); + }; + + // Nearest mode uses this level, so we round to pick the nearest. In linear mode we use this + // level as the lower of the two to interpolate between, so we take the floor. + int levelNum = resolvedMode == SkMipmapMode::kNearest ? sk_float_round2int(level) + : sk_float_floor2int(level); + float lowerWeight = level - levelNum; // fract(level) + SkASSERT(levelNum >= 0); + + if (levelNum == 0) { + load_upper_from_base(); + } + // load fCurrMip if needed + if (levelNum > 0 || (resolvedMode == SkMipmapMode::kLinear && lowerWeight > 0)) { + fCurrMip = try_load_mips(image); + if (!fCurrMip) { + load_upper_from_base(); + resolvedMode = SkMipmapMode::kNone; + } else { + SkMipmap::Level levelRec; + + SkASSERT(resolvedMode != SkMipmapMode::kNone); + if (levelNum > 0) { + if (fCurrMip->getLevel(levelNum - 1, &levelRec)) { + fUpper = levelRec.fPixmap; + } else { + load_upper_from_base(); + resolvedMode = SkMipmapMode::kNone; + } + } + + if (resolvedMode == SkMipmapMode::kLinear) { + if (fCurrMip->getLevel(levelNum, &levelRec)) { + fLower = levelRec.fPixmap; + fLowerWeight = lowerWeight; + fLowerInv = scale(fLower); + } else { + resolvedMode = SkMipmapMode::kNearest; + } + } + } + } + fUpperInv = scale(fUpper); +} + +SkMipmapAccessor* SkMipmapAccessor::Make(SkArenaAlloc* alloc, const SkImage* image, + const SkMatrix& inv, SkMipmapMode mipmap) { + auto* access = alloc->make(as_IB(image), inv, mipmap); + // return null if we failed to get the level (so the caller won't try to use it) + return access->fUpper.addr() ? access : nullptr; +} diff --git a/gfx/skia/skia/src/core/SkMipmapAccessor.h b/gfx/skia/skia/src/core/SkMipmapAccessor.h new file mode 100644 index 0000000000..36b742a27a --- /dev/null +++ b/gfx/skia/skia/src/core/SkMipmapAccessor.h @@ -0,0 +1,53 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMipmapAccessor_DEFINED +#define SkMipmapAccessor_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkImage.h" +#include "include/core/SkMatrix.h" +#include "src/core/SkMipmap.h" +#include + +class SkImage_Base; + +class SkMipmapAccessor : ::SkNoncopyable { +public: + // Returns null on failure + static SkMipmapAccessor* Make(SkArenaAlloc*, const SkImage*, const SkMatrix& inv, SkMipmapMode); + + std::pair level() const { + SkASSERT(fUpper.addr() != nullptr); + return std::make_pair(fUpper, fUpperInv); + } + + std::pair lowerLevel() const { + SkASSERT(fLower.addr() != nullptr); + return std::make_pair(fLower, fLowerInv); + } + + // 0....1. Will be 0 if there is no lowerLevel + float lowerWeight() const { return fLowerWeight; } + +private: + SkPixmap fUpper, + fLower; // only valid for mip_linear + float fLowerWeight; // lower * weight + upper * (1 - weight) + SkMatrix fUpperInv, + fLowerInv; + + // these manage lifetime for the buffers + SkBitmap fBaseStorage; + sk_sp fCurrMip; + +public: + // Don't call publicly -- this is only public for SkArenaAlloc to access it inside Make() + SkMipmapAccessor(const SkImage_Base*, const SkMatrix& inv, SkMipmapMode requestedMode); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkMipmapBuilder.cpp b/gfx/skia/skia/src/core/SkMipmapBuilder.cpp new file mode 100644 index 0000000000..a83b503ce2 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMipmapBuilder.cpp @@ -0,0 +1,37 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/core/SkMipmapBuilder.h" + +#include "include/core/SkImage.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkTypes.h" +#include "src/core/SkMipmap.h" +struct SkImageInfo; + +SkMipmapBuilder::SkMipmapBuilder(const SkImageInfo& info) { + fMM = sk_sp(SkMipmap::Build({info, nullptr, 0}, nullptr, false)); +} + +SkMipmapBuilder::~SkMipmapBuilder() {} + +int SkMipmapBuilder::countLevels() const { + return fMM ? fMM->countLevels() : 0; +} + +SkPixmap SkMipmapBuilder::level(int index) const { + SkPixmap pm; + + SkMipmap::Level level; + if (fMM && fMM->getLevel(index, &level)) { + pm = level.fPixmap; + } + return pm; +} + +sk_sp SkMipmapBuilder::attachTo(const SkImage* src) { + return src->withMipmaps(fMM); +} diff --git a/gfx/skia/skia/src/core/SkMipmapBuilder.h b/gfx/skia/skia/src/core/SkMipmapBuilder.h new file mode 100644 index 0000000000..1e76ed4f70 --- /dev/null +++ b/gfx/skia/skia/src/core/SkMipmapBuilder.h @@ -0,0 +1,40 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkMipmapBuilder_DEFINED +#define SkMipmapBuilder_DEFINED + +#include "include/core/SkRefCnt.h" + +class SkImage; +class SkMipmap; +class SkPixmap; +struct SkImageInfo; + +class SkMipmapBuilder { +public: + SkMipmapBuilder(const SkImageInfo&); + ~SkMipmapBuilder(); + + int countLevels() const; + SkPixmap level(int index) const; + + /** + * If these levels are compatible with src, return a new Image that combines src's base level + * with these levels as mip levels. If not compatible, this returns nullptr. + */ + sk_sp attachTo(const SkImage* src); + + sk_sp attachTo(sk_sp src) { + return this->attachTo(src.get()); + } + +private: + sk_sp fMM; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkModeColorFilter.cpp b/gfx/skia/skia/src/core/SkModeColorFilter.cpp new file mode 100644 index 0000000000..322db1b5b9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkModeColorFilter.cpp @@ -0,0 +1,245 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColorFilter.h" +#include "include/private/SkColorData.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkBlitRow.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkVM.h" +#include "src/core/SkValidationUtils.h" +#include "src/core/SkWriteBuffer.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +template +static SkRGBA4f map_color(const SkColor4f& c, SkColorSpace* src, SkColorSpace* dst) { + SkRGBA4f color = {c.fR, c.fG, c.fB, c.fA}; + SkColorSpaceXformSteps(src, kUnpremul_SkAlphaType, + dst, kDstAT).apply(color.vec()); + return color; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +class SkModeColorFilter final : public SkColorFilterBase { +public: + SkModeColorFilter(const SkColor4f& color, SkBlendMode mode); + + bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override; + + bool onIsAlphaUnchanged() const override; + +#if defined(SK_GANESH) + GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext*, + const GrColorInfo&, + const SkSurfaceProps&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +private: + friend void ::SkRegisterModeColorFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkModeColorFilter) + + void flatten(SkWriteBuffer&) const override; + bool onAsAColorMode(SkColor*, SkBlendMode*) const override; + + skvm::Color onProgram(skvm::Builder*, skvm::Color, + const SkColorInfo&, skvm::Uniforms*, SkArenaAlloc*) const override; + + SkColor4f fColor; // always stored in sRGB + SkBlendMode fMode; +}; + +SkModeColorFilter::SkModeColorFilter(const SkColor4f& color, + SkBlendMode mode) + : fColor(color) + , fMode(mode) {} + +bool SkModeColorFilter::onAsAColorMode(SkColor* color, SkBlendMode* mode) const { + if (color) { + *color = fColor.toSkColor(); + } + if (mode) { + *mode = fMode; + } + return true; +} + +bool SkModeColorFilter::onIsAlphaUnchanged() const { + switch (fMode) { + case SkBlendMode::kDst: //!< [Da, Dc] + case SkBlendMode::kSrcATop: //!< [Da, Sc * Da + (1 - Sa) * Dc] + return true; + default: + break; + } + return false; +} + +void SkModeColorFilter::flatten(SkWriteBuffer& buffer) const { + buffer.writeColor4f(fColor); + buffer.writeUInt((int) fMode); +} + +sk_sp SkModeColorFilter::CreateProc(SkReadBuffer& buffer) { + if (buffer.isVersionLT(SkPicturePriv::kBlend4fColorFilter)) { + // Color is 8-bit, sRGB + SkColor color = buffer.readColor(); + SkBlendMode mode = (SkBlendMode)buffer.readUInt(); + return SkColorFilters::Blend(SkColor4f::FromColor(color), /*sRGB*/nullptr, mode); + } else { + // Color is 32-bit, sRGB + SkColor4f color; + buffer.readColor4f(&color); + SkBlendMode mode = (SkBlendMode)buffer.readUInt(); + return SkColorFilters::Blend(color, /*sRGB*/nullptr, mode); + } +} + +bool SkModeColorFilter::appendStages(const SkStageRec& rec, bool shaderIsOpaque) const { + rec.fPipeline->append(SkRasterPipelineOp::move_src_dst); + SkPMColor4f color = map_color(fColor, sk_srgb_singleton(), rec.fDstCS); + rec.fPipeline->append_constant_color(rec.fAlloc, color.vec()); + SkBlendMode_AppendStages(fMode, rec.fPipeline); + return true; +} + +skvm::Color SkModeColorFilter::onProgram(skvm::Builder* p, skvm::Color c, + const SkColorInfo& dstInfo, + skvm::Uniforms* uniforms, SkArenaAlloc*) const { + SkPMColor4f color = map_color(fColor, sk_srgb_singleton(), dstInfo.colorSpace()); + // The blend program operates on this as if it were premul but the API takes an SkColor4f + skvm::Color dst = c, + src = p->uniformColor({color.fR, color.fG, color.fB, color.fA}, uniforms); + return p->blend(fMode, src,dst); +} + +/////////////////////////////////////////////////////////////////////////////// +#if defined(SK_GANESH) +#include "src/gpu/Blend.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/effects/GrBlendFragmentProcessor.h" + +GrFPResult SkModeColorFilter::asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext*, + const GrColorInfo& dstColorInfo, + const SkSurfaceProps& props) const { + if (fMode == SkBlendMode::kDst) { + // If the blend mode is "dest," the blend color won't factor into it at all. + // We can return the input FP as-is. + return GrFPSuccess(std::move(inputFP)); + } + + SkDEBUGCODE(const bool fpHasConstIO = !inputFP || inputFP->hasConstantOutputForConstantInput();) + + SkPMColor4f color = map_color(fColor, sk_srgb_singleton(), dstColorInfo.colorSpace()); + + auto colorFP = GrFragmentProcessor::MakeColor(color); + auto xferFP = GrBlendFragmentProcessor::Make(std::move(colorFP), std::move(inputFP), fMode); + + if (xferFP == nullptr) { + // This is only expected to happen if the blend mode is "dest" and the input FP is null. + // Since we already did an early-out in the "dest" blend mode case, we shouldn't get here. + SkDEBUGFAIL("GrBlendFragmentProcessor::Make returned null unexpectedly"); + return GrFPFailure(nullptr); + } + + // With a solid color input this should always be able to compute the blended color + // (at least for coeff modes). + // Occasionally, we even do better than we started; specifically, in "src" blend mode, we end up + // ditching the input FP entirely, which turns a non-constant operation into a constant one. + SkASSERT(fMode > SkBlendMode::kLastCoeffMode || + xferFP->hasConstantOutputForConstantInput() >= fpHasConstIO); + + return GrFPSuccess(std::move(xferFP)); +} + +#endif + +#if defined(SK_GRAPHITE) +void SkModeColorFilter::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SkPMColor4f color = map_color(fColor, sk_srgb_singleton(), + keyContext.dstColorInfo().colorSpace()); + BlendColorFilterBlock::BlendColorFilterData data(fMode, color); + + BlendColorFilterBlock::BeginBlock(keyContext, builder, gatherer, &data); + builder->endBlock(); +} + +#endif + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkColorFilters::Blend(const SkColor4f& color, + sk_sp colorSpace, + SkBlendMode mode) { + if (!SkIsValidMode(mode)) { + return nullptr; + } + + // First map to sRGB to simplify storage in the actual SkColorFilter instance, staying unpremul + // until the final dst color space is known when actually filtering. + SkColor4f srgb = map_color( + color, colorSpace.get(), sk_srgb_singleton()); + + // Next collapse some modes if possible + float alpha = srgb.fA; + if (SkBlendMode::kClear == mode) { + srgb = SkColors::kTransparent; + mode = SkBlendMode::kSrc; + } else if (SkBlendMode::kSrcOver == mode) { + if (0.f == alpha) { + mode = SkBlendMode::kDst; + } else if (1.f == alpha) { + mode = SkBlendMode::kSrc; + } + // else just stay srcover + } + + // Finally weed out combinations that are noops, and just return null + if (SkBlendMode::kDst == mode || + (0.f == alpha && (SkBlendMode::kSrcOver == mode || + SkBlendMode::kDstOver == mode || + SkBlendMode::kDstOut == mode || + SkBlendMode::kSrcATop == mode || + SkBlendMode::kXor == mode || + SkBlendMode::kDarken == mode)) || + (1.f == alpha && SkBlendMode::kDstIn == mode)) { + return nullptr; + } + + return sk_sp(new SkModeColorFilter(srgb, mode)); +} + +sk_sp SkColorFilters::Blend(SkColor color, SkBlendMode mode) { + return Blend(SkColor4f::FromColor(color), /*sRGB*/nullptr, mode); +} + +void SkRegisterModeColorFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkModeColorFilter); +} diff --git a/gfx/skia/skia/src/core/SkNextID.h b/gfx/skia/skia/src/core/SkNextID.h new file mode 100644 index 0000000000..395c9a27a6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkNextID.h @@ -0,0 +1,21 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkNextID_DEFINED +#define SkNextID_DEFINED + +#include "include/core/SkTypes.h" + +class SkNextID { +public: + /** + * Shared between SkPixelRef's generationID and SkImage's uniqueID + */ + static uint32_t ImageID(); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkOSFile.h b/gfx/skia/skia/src/core/SkOSFile.h new file mode 100644 index 0000000000..2f9eccf193 --- /dev/null +++ b/gfx/skia/skia/src/core/SkOSFile.h @@ -0,0 +1,101 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +// TODO: add unittests for all these operations + +#ifndef SkOSFile_DEFINED +#define SkOSFile_DEFINED + +#include + +#include "include/core/SkString.h" +#include "include/private/base/SkTemplates.h" + +enum SkFILE_Flags { + kRead_SkFILE_Flag = 0x01, + kWrite_SkFILE_Flag = 0x02 +}; + +FILE* sk_fopen(const char path[], SkFILE_Flags); +void sk_fclose(FILE*); + +size_t sk_fgetsize(FILE*); + +size_t sk_fwrite(const void* buffer, size_t byteCount, FILE*); + +void sk_fflush(FILE*); +void sk_fsync(FILE*); + +size_t sk_ftell(FILE*); + +/** Maps a file into memory. Returns the address and length on success, NULL otherwise. + * The mapping is read only. + * When finished with the mapping, free the returned pointer with sk_fmunmap. + */ +void* sk_fmmap(FILE* f, size_t* length); + +/** Maps a file descriptor into memory. Returns the address and length on success, NULL otherwise. + * The mapping is read only. + * When finished with the mapping, free the returned pointer with sk_fmunmap. + */ +void* sk_fdmmap(int fd, size_t* length); + +/** Unmaps a file previously mapped by sk_fmmap or sk_fdmmap. + * The length parameter must be the same as returned from sk_fmmap. + */ +void sk_fmunmap(const void* addr, size_t length); + +/** Returns true if the two point at the exact same filesystem object. */ +bool sk_fidentical(FILE* a, FILE* b); + +/** Returns the underlying file descriptor for the given file. + * The return value will be < 0 on failure. + */ +int sk_fileno(FILE* f); + +/** Returns true if something (file, directory, ???) exists at this path, + * and has the specified access flags. + */ +bool sk_exists(const char *path, SkFILE_Flags = (SkFILE_Flags)0); + +// Returns true if a directory exists at this path. +bool sk_isdir(const char *path); + +// Like pread, but may affect the file position marker. +// Returns the number of bytes read or SIZE_MAX if failed. +size_t sk_qread(FILE*, void* buffer, size_t count, size_t offset); + + +// Create a new directory at this path; returns true if successful. +// If the directory already existed, this will return true. +// Description of the error, if any, will be written to stderr. +bool sk_mkdir(const char* path); + +class SkOSFile { +public: + class Iter { + public: + // SPI for module use. + SK_SPI Iter(); + SK_SPI Iter(const char path[], const char suffix[] = nullptr); + SK_SPI ~Iter(); + + SK_SPI void reset(const char path[], const char suffix[] = nullptr); + /** If getDir is true, only returns directories. + Results are undefined if true and false calls are + interleaved on a single iterator. + */ + SK_SPI bool next(SkString* name, bool getDir = false); + + static const size_t kStorageSize = 40; + private: + alignas(void*) alignas(double) char fSelf[kStorageSize]; + }; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkOpts.cpp b/gfx/skia/skia/src/core/SkOpts.cpp new file mode 100644 index 0000000000..1c329ca647 --- /dev/null +++ b/gfx/skia/skia/src/core/SkOpts.cpp @@ -0,0 +1,153 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkOnce.h" +#include "src/base/SkHalf.h" +#include "src/core/SkCpu.h" +#include "src/core/SkOpts.h" + +#if defined(SK_ARM_HAS_NEON) + #if defined(SK_ARM_HAS_CRC32) + #define SK_OPTS_NS neon_and_crc32 + #else + #define SK_OPTS_NS neon + #endif +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SKX + #define SK_OPTS_NS skx +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + #define SK_OPTS_NS avx2 +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX + #define SK_OPTS_NS avx +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE42 + #define SK_OPTS_NS sse42 +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41 + #define SK_OPTS_NS sse41 +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 + #define SK_OPTS_NS ssse3 +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE3 + #define SK_OPTS_NS sse3 +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #define SK_OPTS_NS sse2 +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1 + #define SK_OPTS_NS sse +#else + #define SK_OPTS_NS portable +#endif + +#include "src/core/SkCubicSolver.h" +#include "src/opts/SkBitmapProcState_opts.h" +#include "src/opts/SkBlitMask_opts.h" +#include "src/opts/SkBlitRow_opts.h" +#include "src/opts/SkChecksum_opts.h" +#include "src/opts/SkRasterPipeline_opts.h" +#include "src/opts/SkSwizzler_opts.h" +#include "src/opts/SkUtils_opts.h" +#include "src/opts/SkVM_opts.h" +#include "src/opts/SkXfermode_opts.h" + +namespace SkOpts { + // Define default function pointer values here... + // If our global compile options are set high enough, these defaults might even be + // CPU-specialized, e.g. a typical x86-64 machine might start with SSE2 defaults. + // They'll still get a chance to be replaced with even better ones, e.g. using SSE4.1. +#define DEFINE_DEFAULT(name) decltype(name) name = SK_OPTS_NS::name + DEFINE_DEFAULT(create_xfermode); + + DEFINE_DEFAULT(blit_mask_d32_a8); + + DEFINE_DEFAULT(blit_row_color32); + DEFINE_DEFAULT(blit_row_s32a_opaque); + + DEFINE_DEFAULT(RGBA_to_BGRA); + DEFINE_DEFAULT(RGBA_to_rgbA); + DEFINE_DEFAULT(RGBA_to_bgrA); + DEFINE_DEFAULT(RGB_to_RGB1); + DEFINE_DEFAULT(RGB_to_BGR1); + DEFINE_DEFAULT(gray_to_RGB1); + DEFINE_DEFAULT(grayA_to_RGBA); + DEFINE_DEFAULT(grayA_to_rgbA); + DEFINE_DEFAULT(inverted_CMYK_to_RGB1); + DEFINE_DEFAULT(inverted_CMYK_to_BGR1); + + DEFINE_DEFAULT(memset16); + DEFINE_DEFAULT(memset32); + DEFINE_DEFAULT(memset64); + + DEFINE_DEFAULT(rect_memset16); + DEFINE_DEFAULT(rect_memset32); + DEFINE_DEFAULT(rect_memset64); + + DEFINE_DEFAULT(cubic_solver); + + DEFINE_DEFAULT(hash_fn); + + DEFINE_DEFAULT(S32_alpha_D32_filter_DX); + DEFINE_DEFAULT(S32_alpha_D32_filter_DXDY); + + DEFINE_DEFAULT(interpret_skvm); +#undef DEFINE_DEFAULT + + size_t raster_pipeline_lowp_stride = SK_OPTS_NS::raster_pipeline_lowp_stride(); + size_t raster_pipeline_highp_stride = SK_OPTS_NS::raster_pipeline_highp_stride(); + +#define M(st) (StageFn)SK_OPTS_NS::st, + StageFn ops_highp[] = { SK_RASTER_PIPELINE_OPS_ALL(M) }; + StageFn just_return_highp = (StageFn)SK_OPTS_NS::just_return; + void (*start_pipeline_highp)(size_t, size_t, size_t, size_t, SkRasterPipelineStage*) = + SK_OPTS_NS::start_pipeline; +#undef M + +#define M(st) (StageFn)SK_OPTS_NS::lowp::st, + StageFn ops_lowp[] = { SK_RASTER_PIPELINE_OPS_LOWP(M) }; + StageFn just_return_lowp = (StageFn)SK_OPTS_NS::lowp::just_return; + void (*start_pipeline_lowp)(size_t, size_t, size_t, size_t, SkRasterPipelineStage*) = + SK_OPTS_NS::lowp::start_pipeline; +#undef M + + // Each Init_foo() is defined in src/opts/SkOpts_foo.cpp. + void Init_ssse3(); + void Init_sse42(); + void Init_avx(); + void Init_hsw(); + void Init_skx(); + void Init_erms(); + void Init_crc32(); + + static void init() { + #if defined(SK_ENABLE_OPTIMIZE_SIZE) + // All Init_foo functions are omitted when optimizing for size + #elif defined(SK_CPU_X86) + #if SK_CPU_SSE_LEVEL < SK_CPU_SSE_LEVEL_SSSE3 + if (SkCpu::Supports(SkCpu::SSSE3)) { Init_ssse3(); } + #endif + + #if SK_CPU_SSE_LEVEL < SK_CPU_SSE_LEVEL_SSE42 + if (SkCpu::Supports(SkCpu::SSE42)) { Init_sse42(); } + #endif + + #if SK_CPU_SSE_LEVEL < SK_CPU_SSE_LEVEL_AVX + if (SkCpu::Supports(SkCpu::AVX)) { Init_avx(); } + if (SkCpu::Supports(SkCpu::HSW)) { Init_hsw(); } + #endif + + #if SK_CPU_SSE_LEVEL < SK_CPU_SSE_LEVEL_SKX + if (SkCpu::Supports(SkCpu::SKX)) { Init_skx(); } + #endif + + if (SkCpu::Supports(SkCpu::ERMS)) { Init_erms(); } + + #elif defined(SK_CPU_ARM64) + if (SkCpu::Supports(SkCpu::CRC32)) { Init_crc32(); } + + #endif + } + + void Init() { + static SkOnce once; + once(init); + } +} // namespace SkOpts diff --git a/gfx/skia/skia/src/core/SkOpts.h b/gfx/skia/skia/src/core/SkOpts.h new file mode 100644 index 0000000000..4df2a4f98c --- /dev/null +++ b/gfx/skia/skia/src/core/SkOpts.h @@ -0,0 +1,139 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOpts_DEFINED +#define SkOpts_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/SkOpts_spi.h" +#include "src/core/SkRasterPipelineOpList.h" +#include "src/core/SkXfermodePriv.h" + +/** + * SkOpts (short for SkOptimizations) is a mechanism where we can ship with multiple implementations + * of a set of functions and dynamically choose the best one at runtime (e.g. the call to + * SkGraphics::Init(), which calls SkOpts::Init()) depending on the detected CPU features. This is + * also referred to as having "specializations" of a given function. + * + * For example, Skia might be compiled to support CPUs that only have the sse2 instruction set + * (https://en.wikipedia.org/wiki/X86_instruction_listings#SSE2_instructions) + * but may be run on a more modern CPU that supports sse42 instructions. + * (https://en.wikipedia.org/wiki/SSE4) + * SkOpts allow Skia to have two versions of a CRC32 checksum function, one that uses normal C++ + * code (e.g. loops, bit operations, table lookups) and one that makes use of the _mm_crc32_u64 + * intrinsic function which uses the SSE4.2 crc32 machine instruction under the hood. This hash + * function is declared here in the SkOpts namespace, and then the implementation (see SkOpts.cpp) + * is deferred to a function of the same name in the sse2:: namespace (the minimum Skia is compiled + * with) using DEFINE_DEFAULT. + * + * All implementations of this hash function are done in a header file file in //src/opts + * (e.g. //src/opts/SkChecksum_opts.h). ifdefs guard each of the implementations, such that only + * one implementation is possible for a given SK_CPU_SSE_LEVEL. This header will be compiled + * *multiple* times with a different SK_CPU_SSE_LEVEL each compilation. + * + * Each CPU instruction set that we want specializations for has a .cpp file in //src/opts which + * defines an Init() function that replaces the function pointers in the SkOpts namespace with the + * ones from the specialized namespace (e.g. sse42::). These .cpp files don't implement the + * specializations, they just refer to the specialization created in the header files (e.g. + * SkChecksum_opts.h). + * + * At compile time: + * - SkOpts.cpp is compiled with the minimum CPU level (e.g. SSE2). Because this + * file includes all the headers in //src/opts/, those headers add "the default implementation" + * of all their functions to the SK_OPTS_NS namespace (e.g. sse2::hash_fn). + * - Each of the specialized .cpp files in //src/opts/ are compiled with their respective + * compiler flags. Because the specialized .cpp file includes the headers that implement the + * functions using intrinsics or other CPU-specific code, those specialized functions end up + * in the specialized namespace, e.g. (sse42::hash_fn). + * + * At link time, the default implementations and all specializations of all SkOpts functions are + * included in the resulting library/binary file. + * + * At runtime, SkOpts::Init() will run the appropriate Init functions that the current CPU level + * supports specializations for (e.g. Init_sse42, Init_ssse3). Note multiple Init functions can + * be called as CPU instruction sets are typically super sets of older instruction sets + */ + +struct SkBitmapProcState; +struct SkRasterPipelineStage; +namespace skvm { +struct InterpreterInstruction; +} +namespace SkSL { +class TraceHook; +} + +namespace SkOpts { + // Call to replace pointers to portable functions with pointers to CPU-specific functions. + // Thread-safe and idempotent. + // Called by SkGraphics::Init(). + void Init(); + + // Declare function pointers here... + + // May return nullptr if we haven't specialized the given Mode. + extern SkXfermode* (*create_xfermode)(SkBlendMode); + + extern void (*blit_mask_d32_a8)(SkPMColor*, size_t, const SkAlpha*, size_t, SkColor, int, int); + extern void (*blit_row_color32)(SkPMColor*, const SkPMColor*, int, SkPMColor); + extern void (*blit_row_s32a_opaque)(SkPMColor*, const SkPMColor*, int, U8CPU); + + // Swizzle input into some sort of 8888 pixel, {premul,unpremul} x {rgba,bgra}. + typedef void (*Swizzle_8888_u32)(uint32_t*, const uint32_t*, int); + extern Swizzle_8888_u32 RGBA_to_BGRA, // i.e. just swap RB + RGBA_to_rgbA, // i.e. just premultiply + RGBA_to_bgrA, // i.e. swap RB and premultiply + inverted_CMYK_to_RGB1, // i.e. convert color space + inverted_CMYK_to_BGR1; // i.e. convert color space + + typedef void (*Swizzle_8888_u8)(uint32_t*, const uint8_t*, int); + extern Swizzle_8888_u8 RGB_to_RGB1, // i.e. insert an opaque alpha + RGB_to_BGR1, // i.e. swap RB and insert an opaque alpha + gray_to_RGB1, // i.e. expand to color channels + an opaque alpha + grayA_to_RGBA, // i.e. expand to color channels + grayA_to_rgbA; // i.e. expand to color channels and premultiply + + extern void (*memset16)(uint16_t[], uint16_t, int); + extern void (*memset32)(uint32_t[], uint32_t, int); + extern void (*memset64)(uint64_t[], uint64_t, int); + + extern void (*rect_memset16)(uint16_t[], uint16_t, int, size_t, int); + extern void (*rect_memset32)(uint32_t[], uint32_t, int, size_t, int); + extern void (*rect_memset64)(uint64_t[], uint64_t, int, size_t, int); + + extern float (*cubic_solver)(float, float, float, float); + + static inline uint32_t hash(const void* data, size_t bytes, uint32_t seed=0) { + // hash_fn is defined in SkOpts_spi.h so it can be used by //modules + return hash_fn(data, bytes, seed); + } + + // SkBitmapProcState optimized Shader, Sample, or Matrix procs. + extern void (*S32_alpha_D32_filter_DX)(const SkBitmapProcState&, + const uint32_t* xy, int count, SkPMColor*); + extern void (*S32_alpha_D32_filter_DXDY)(const SkBitmapProcState&, + const uint32_t* xy, int count, SkPMColor*); + + // We can't necessarily express the type of SkRasterPipeline stage functions here, + // so we just use this void(*)(void) as a stand-in. + using StageFn = void(*)(void); + extern StageFn ops_highp[kNumRasterPipelineHighpOps], just_return_highp; + extern StageFn ops_lowp [kNumRasterPipelineLowpOps ], just_return_lowp; + + extern void (*start_pipeline_highp)(size_t,size_t,size_t,size_t, SkRasterPipelineStage*); + extern void (*start_pipeline_lowp )(size_t,size_t,size_t,size_t, SkRasterPipelineStage*); + + extern size_t raster_pipeline_lowp_stride; + extern size_t raster_pipeline_highp_stride; + + extern void (*interpret_skvm)(const skvm::InterpreterInstruction insts[], int ninsts, + int nregs, int loop, const int strides[], + SkSL::TraceHook* traceHooks[], int nTraceHooks, + int nargs, int n, void* args[]); +} // namespace SkOpts + +#endif // SkOpts_DEFINED diff --git a/gfx/skia/skia/src/core/SkOpts_erms.cpp b/gfx/skia/skia/src/core/SkOpts_erms.cpp new file mode 100644 index 0000000000..4e1e096d7d --- /dev/null +++ b/gfx/skia/skia/src/core/SkOpts_erms.cpp @@ -0,0 +1,122 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkMSAN.h" +#include "src/core/SkOpts.h" + +#if defined(__x86_64__) || defined(_M_X64) // memset16 and memset32 could work on 32-bit x86 too. + + static const char* note = "MSAN can't see that rep sto initializes memory."; + + #if defined(_MSC_VER) + #include + static inline void repsto(uint16_t* dst, uint16_t v, size_t n) { + sk_msan_mark_initialized(dst,dst+n,note); + __stosw(dst, v, n); + } + static inline void repsto(uint32_t* dst, uint32_t v, size_t n) { + sk_msan_mark_initialized(dst,dst+n,note); + static_assert(sizeof(uint32_t) == sizeof(unsigned long)); + __stosd(reinterpret_cast(dst), v, n); + } + static inline void repsto(uint64_t* dst, uint64_t v, size_t n) { + sk_msan_mark_initialized(dst,dst+n,note); + __stosq(dst, v, n); + } + #else + static inline void repsto(uint16_t* dst, uint16_t v, size_t n) { + sk_msan_mark_initialized(dst,dst+n,note); + asm volatile("rep stosw" : "+D"(dst), "+c"(n) : "a"(v) : "memory"); + } + static inline void repsto(uint32_t* dst, uint32_t v, size_t n) { + sk_msan_mark_initialized(dst,dst+n,note); + asm volatile("rep stosl" : "+D"(dst), "+c"(n) : "a"(v) : "memory"); + } + static inline void repsto(uint64_t* dst, uint64_t v, size_t n) { + sk_msan_mark_initialized(dst,dst+n,note); + asm volatile("rep stosq" : "+D"(dst), "+c"(n) : "a"(v) : "memory"); + } + #endif + + // ERMS is ideal for large copies but has a relatively high setup cost, + // so we use the previous best routine for small inputs. FSRM would make this moot. + static void (*g_memset16_prev)(uint16_t*, uint16_t, int); + static void (*g_memset32_prev)(uint32_t*, uint32_t, int); + static void (*g_memset64_prev)(uint64_t*, uint64_t, int); + static void (*g_rect_memset16_prev)(uint16_t*, uint16_t, int, size_t, int); + static void (*g_rect_memset32_prev)(uint32_t*, uint32_t, int, size_t, int); + static void (*g_rect_memset64_prev)(uint64_t*, uint64_t, int, size_t, int); + + // Empirically determined with `nanobench -m memset`. + static bool small(size_t bytes) { return bytes < 1024; } + + #define SK_OPTS_NS erms + namespace SK_OPTS_NS { + static inline void memset16(uint16_t* dst, uint16_t v, int n) { + return small(sizeof(v)*n) ? g_memset16_prev(dst, v, n) + : repsto(dst, v, n); + } + static inline void memset32(uint32_t* dst, uint32_t v, int n) { + return small(sizeof(v)*n) ? g_memset32_prev(dst, v, n) + : repsto(dst, v, n); + } + static inline void memset64(uint64_t* dst, uint64_t v, int n) { + return small(sizeof(v)*n) ? g_memset64_prev(dst, v, n) + : repsto(dst, v, n); + } + + static inline void rect_memset16(uint16_t* dst, uint16_t v, int n, + size_t rowBytes, int height) { + if (small(sizeof(v)*n)) { + return g_rect_memset16_prev(dst,v,n, rowBytes,height); + } + for (int stride = rowBytes/sizeof(v); height --> 0; dst += stride) { + repsto(dst, v, n); + } + } + static inline void rect_memset32(uint32_t* dst, uint32_t v, int n, + size_t rowBytes, int height) { + if (small(sizeof(v)*n)) { + return g_rect_memset32_prev(dst,v,n, rowBytes,height); + } + for (int stride = rowBytes/sizeof(v); height --> 0; dst += stride) { + repsto(dst, v, n); + } + } + static inline void rect_memset64(uint64_t* dst, uint64_t v, int n, + size_t rowBytes, int height) { + if (small(sizeof(v)*n)) { + return g_rect_memset64_prev(dst,v,n, rowBytes,height); + } + for (int stride = rowBytes/sizeof(v); height --> 0; dst += stride) { + repsto(dst, v, n); + } + } + } // namespace SK_OPTS_NS + + namespace SkOpts { + void Init_erms() { + g_memset16_prev = memset16; + g_memset32_prev = memset32; + g_memset64_prev = memset64; + g_rect_memset16_prev = rect_memset16; + g_rect_memset32_prev = rect_memset32; + g_rect_memset64_prev = rect_memset64; + + memset16 = SK_OPTS_NS::memset16; + memset32 = SK_OPTS_NS::memset32; + memset64 = SK_OPTS_NS::memset64; + rect_memset16 = SK_OPTS_NS::rect_memset16; + rect_memset32 = SK_OPTS_NS::rect_memset32; + rect_memset64 = SK_OPTS_NS::rect_memset64; + } + } +#else + namespace SkOpts { + void Init_erms() {} + } +#endif diff --git a/gfx/skia/skia/src/core/SkOrderedReadBuffer.h b/gfx/skia/skia/src/core/SkOrderedReadBuffer.h new file mode 100644 index 0000000000..239d8b68c2 --- /dev/null +++ b/gfx/skia/skia/src/core/SkOrderedReadBuffer.h @@ -0,0 +1,9 @@ +// Temporary shim to keep a couple dependencies working in Chromium. +#ifndef SkOrderedReadBuffer_DEFINED +#define SkOrderedReadBuffer_DEFINED + +#include "src/core/SkReadBuffer.h" + +typedef SkReadBuffer SkOrderedReadBuffer; + +#endif//SkOrderedReadBuffer_DEFINED diff --git a/gfx/skia/skia/src/core/SkOverdrawCanvas.cpp b/gfx/skia/skia/src/core/SkOverdrawCanvas.cpp new file mode 100644 index 0000000000..621ff4b87b --- /dev/null +++ b/gfx/skia/skia/src/core/SkOverdrawCanvas.cpp @@ -0,0 +1,259 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkOverdrawCanvas.h" + +#include "include/core/SkColorFilter.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkPath.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkTextBlob.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkDevice.h" +#include "src/core/SkDrawShadowInfo.h" +#include "src/core/SkGlyphRunPainter.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkLatticeIter.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkTextBlobPriv.h" +#include "src/text/GlyphRun.h" +#include "src/utils/SkPatchUtils.h" + +SkOverdrawCanvas::SkOverdrawCanvas(SkCanvas* canvas) + : INHERITED(canvas->onImageInfo().width(), canvas->onImageInfo().height()) +{ + // Non-drawing calls that SkOverdrawCanvas does not override (translate, save, etc.) + // will pass through to the input canvas. + this->addCanvas(canvas); + + static constexpr float kIncrementAlpha[] = { + 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, + 0.0f, 0.0f, 0.0f, 0.0f, 1.0f/255, + }; + + fPaint.setAntiAlias(false); + fPaint.setBlendMode(SkBlendMode::kPlus); + fPaint.setColorFilter(SkColorFilters::Matrix(kIncrementAlpha)); +} + +namespace { +class TextDevice : public SkNoPixelsDevice, public SkGlyphRunListPainterCPU::BitmapDevicePainter { +public: + TextDevice(SkCanvas* overdrawCanvas, const SkSurfaceProps& props) + : SkNoPixelsDevice{SkIRect::MakeWH(32767, 32767), props}, + fOverdrawCanvas{overdrawCanvas}, + fPainter{props, kN32_SkColorType, nullptr} {} + + void paintMasks(SkZip accepted, const SkPaint& paint) const override { + for (auto [glyph, pos] : accepted) { + SkMask mask = glyph->mask(pos); + // We need to ignore any matrix on the overdraw canvas (it's already been baked into + // our glyph positions). Otherwise, the CTM is double-applied. (skbug.com/13732) + fOverdrawCanvas->save(); + fOverdrawCanvas->resetMatrix(); + fOverdrawCanvas->drawRect(SkRect::Make(mask.fBounds), SkPaint()); + fOverdrawCanvas->restore(); + } + } + + void drawBitmap(const SkBitmap&, const SkMatrix&, const SkRect* dstOrNull, + const SkSamplingOptions&, const SkPaint&) const override {} + + void onDrawGlyphRunList(SkCanvas* canvas, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) override { + SkASSERT(!glyphRunList.hasRSXForm()); + fPainter.drawForBitmapDevice(canvas, this, glyphRunList, drawingPaint, + fOverdrawCanvas->getTotalMatrix()); + } + +private: + SkCanvas* const fOverdrawCanvas; + SkGlyphRunListPainterCPU fPainter; +}; +} // namespace + +void SkOverdrawCanvas::onDrawTextBlob( + const SkTextBlob* blob, SkScalar x, SkScalar y, const SkPaint& paint) { + sktext::GlyphRunBuilder b; + auto glyphRunList = b.blobToGlyphRunList(*blob, {x, y}); + this->onDrawGlyphRunList(glyphRunList, paint); +} + +void SkOverdrawCanvas::onDrawGlyphRunList( + const sktext::GlyphRunList& glyphRunList, + const SkPaint& paint) { + SkSurfaceProps props{0, kUnknown_SkPixelGeometry}; + this->getProps(&props); + TextDevice device{this, props}; + + device.drawGlyphRunList(this, glyphRunList, paint, paint); +} + +void SkOverdrawCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode blendMode, + const SkPaint&) { + fList[0]->onDrawPatch(cubics, colors, texCoords, blendMode, fPaint); +} + +void SkOverdrawCanvas::onDrawPaint(const SkPaint& paint) { + if (0 == paint.getColor() && !paint.getColorFilter() && !paint.getShader()) { + // This is a clear, ignore it. + } else { + fList[0]->onDrawPaint(this->overdrawPaint(paint)); + } +} + +void SkOverdrawCanvas::onDrawBehind(const SkPaint& paint) { + fList[0]->onDrawBehind(this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint) { + fList[0]->onDrawRect(rect, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawRegion(const SkRegion& region, const SkPaint& paint) { + fList[0]->onDrawRegion(region, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawOval(const SkRect& oval, const SkPaint& paint) { + fList[0]->onDrawOval(oval, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawArc(const SkRect& arc, SkScalar startAngle, SkScalar sweepAngle, + bool useCenter, const SkPaint& paint) { + fList[0]->onDrawArc(arc, startAngle, sweepAngle, useCenter, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, + const SkPaint& paint) { + fList[0]->onDrawDRRect(outer, inner, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawRRect(const SkRRect& rect, const SkPaint& paint) { + fList[0]->onDrawRRect(rect, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawPoints(PointMode mode, size_t count, const SkPoint points[], + const SkPaint& paint) { + fList[0]->onDrawPoints(mode, count, points, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawVerticesObject(const SkVertices* vertices, + SkBlendMode blendMode, const SkPaint& paint) { + fList[0]->onDrawVerticesObject(vertices, blendMode, this->overdrawPaint(paint)); +} + +void SkOverdrawCanvas::onDrawAtlas2(const SkImage* image, const SkRSXform xform[], + const SkRect texs[], const SkColor colors[], int count, + SkBlendMode mode, const SkSamplingOptions& sampling, + const SkRect* cull, const SkPaint* paint) { + SkPaint* paintPtr = &fPaint; + SkPaint storage; + if (paint) { + storage = this->overdrawPaint(*paint); + paintPtr = &storage; + } + + fList[0]->onDrawAtlas2(image, xform, texs, colors, count, mode, sampling, cull, paintPtr); +} + +void SkOverdrawCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) { + fList[0]->onDrawPath(path, fPaint); +} + +void SkOverdrawCanvas::onDrawImage2(const SkImage* image, SkScalar x, SkScalar y, + const SkSamplingOptions&, const SkPaint*) { + fList[0]->onDrawRect(SkRect::MakeXYWH(x, y, image->width(), image->height()), fPaint); +} + +void SkOverdrawCanvas::onDrawImageRect2(const SkImage* image, const SkRect& src, const SkRect& dst, + const SkSamplingOptions&, const SkPaint*, SrcRectConstraint) { + fList[0]->onDrawRect(dst, fPaint); +} + +void SkOverdrawCanvas::onDrawImageLattice2(const SkImage* image, const Lattice& lattice, + const SkRect& dst, SkFilterMode, const SkPaint*) { + SkIRect bounds; + Lattice latticePlusBounds = lattice; + if (!latticePlusBounds.fBounds) { + bounds = SkIRect::MakeWH(image->width(), image->height()); + latticePlusBounds.fBounds = &bounds; + } + + if (SkLatticeIter::Valid(image->width(), image->height(), latticePlusBounds)) { + SkLatticeIter iter(latticePlusBounds, dst); + + SkRect ignored, iterDst; + while (iter.next(&ignored, &iterDst)) { + fList[0]->onDrawRect(iterDst, fPaint); + } + } else { + fList[0]->onDrawRect(dst, fPaint); + } +} + +void SkOverdrawCanvas::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) { + drawable->draw(this, matrix); +} + +void SkOverdrawCanvas::onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) { + SkASSERT(false); + return; +} + +void SkOverdrawCanvas::onDrawAnnotation(const SkRect&, const char[], SkData*) {} + +void SkOverdrawCanvas::onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) { + SkRect bounds; + SkDrawShadowMetrics::GetLocalBounds(path, rec, this->getTotalMatrix(), &bounds); + fList[0]->onDrawRect(bounds, fPaint); +} + +void SkOverdrawCanvas::onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], + QuadAAFlags aa, const SkColor4f& color, SkBlendMode mode) { + if (clip) { + fList[0]->onDrawPath(SkPath::Polygon(clip, 4, true), fPaint); + } else { + fList[0]->onDrawRect(rect, fPaint); + } +} + +void SkOverdrawCanvas::onDrawEdgeAAImageSet2(const ImageSetEntry set[], int count, + const SkPoint dstClips[], + const SkMatrix preViewMatrices[], + const SkSamplingOptions& sampling, + const SkPaint* paint, + SrcRectConstraint constraint) { + int clipIndex = 0; + for (int i = 0; i < count; ++i) { + if (set[i].fMatrixIndex >= 0) { + fList[0]->save(); + fList[0]->concat(preViewMatrices[set[i].fMatrixIndex]); + } + if (set[i].fHasClip) { + fList[0]->onDrawPath(SkPath::Polygon(dstClips + clipIndex, 4, true), fPaint); + clipIndex += 4; + } else { + fList[0]->onDrawRect(set[i].fDstRect, fPaint); + } + if (set[i].fMatrixIndex >= 0) { + fList[0]->restore(); + } + } +} + +inline SkPaint SkOverdrawCanvas::overdrawPaint(const SkPaint& paint) { + SkPaint newPaint = fPaint; + newPaint.setStyle(paint.getStyle()); + newPaint.setStrokeWidth(paint.getStrokeWidth()); + return newPaint; +} diff --git a/gfx/skia/skia/src/core/SkPaint.cpp b/gfx/skia/skia/src/core/SkPaint.cpp new file mode 100644 index 0000000000..67f66bf295 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPaint.cpp @@ -0,0 +1,294 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPaint.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkBlender.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkShader.h" +#include "include/core/SkStrokeRec.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkPaintDefaults.h" +#include "src/core/SkPathEffectBase.h" + +#include + +// define this to get a printf for out-of-range parameter in setters +// e.g. setTextSize(-1) +//#define SK_REPORT_API_RANGE_CHECK + + +SkPaint::SkPaint() + : fColor4f{0, 0, 0, 1} // opaque black + , fWidth{0} + , fMiterLimit{SkPaintDefaults_MiterLimit} + , fBitfields{(unsigned)false, // fAntiAlias + (unsigned)false, // fDither + (unsigned)SkPaint::kDefault_Cap, // fCapType + (unsigned)SkPaint::kDefault_Join, // fJoinType + (unsigned)SkPaint::kFill_Style, // fStyle + 0} // fPadding +{ + static_assert(sizeof(fBitfields) == sizeof(fBitfieldsUInt), ""); +} + +SkPaint::SkPaint(const SkColor4f& color, SkColorSpace* colorSpace) : SkPaint() { + this->setColor(color, colorSpace); +} + +SkPaint::SkPaint(const SkPaint& src) = default; + +SkPaint::SkPaint(SkPaint&& src) = default; + +SkPaint::~SkPaint() = default; + +SkPaint& SkPaint::operator=(const SkPaint& src) = default; + +SkPaint& SkPaint::operator=(SkPaint&& src) = default; + +bool operator==(const SkPaint& a, const SkPaint& b) { +#define EQUAL(field) (a.field == b.field) + return EQUAL(fPathEffect) + && EQUAL(fShader) + && EQUAL(fMaskFilter) + && EQUAL(fColorFilter) + && EQUAL(fBlender) + && EQUAL(fImageFilter) + && EQUAL(fColor4f) + && EQUAL(fWidth) + && EQUAL(fMiterLimit) + && EQUAL(fBitfieldsUInt) + ; +#undef EQUAL +} + +#define DEFINE_FIELD_REF(type) \ + sk_sp SkPaint::ref##type() const { return f##type; } +DEFINE_FIELD_REF(ColorFilter) +DEFINE_FIELD_REF(Blender) +DEFINE_FIELD_REF(ImageFilter) +DEFINE_FIELD_REF(MaskFilter) +DEFINE_FIELD_REF(PathEffect) +DEFINE_FIELD_REF(Shader) +#undef DEFINE_FIELD_REF + +#define DEFINE_FIELD_SET(Field) \ + void SkPaint::set##Field(sk_sp f) { f##Field = std::move(f); } +DEFINE_FIELD_SET(ColorFilter) +DEFINE_FIELD_SET(ImageFilter) +DEFINE_FIELD_SET(MaskFilter) +DEFINE_FIELD_SET(PathEffect) +DEFINE_FIELD_SET(Shader) +#undef DEFINE_FIELD_SET + +/////////////////////////////////////////////////////////////////////////////// + +void SkPaint::reset() { *this = SkPaint(); } + +void SkPaint::setStyle(Style style) { + if ((unsigned)style < kStyleCount) { + fBitfields.fStyle = style; + } else { +#ifdef SK_REPORT_API_RANGE_CHECK + SkDebugf("SkPaint::setStyle(%d) out of range\n", style); +#endif + } +} + +void SkPaint::setStroke(bool isStroke) { + fBitfields.fStyle = isStroke ? kStroke_Style : kFill_Style; +} + +void SkPaint::setColor(SkColor color) { + fColor4f = SkColor4f::FromColor(color); +} + +void SkPaint::setColor(const SkColor4f& color, SkColorSpace* colorSpace) { + SkColorSpaceXformSteps steps{colorSpace, kUnpremul_SkAlphaType, + sk_srgb_singleton(), kUnpremul_SkAlphaType}; + fColor4f = {color.fR, color.fG, color.fB, SkTPin(color.fA, 0.0f, 1.0f)}; + steps.apply(fColor4f.vec()); +} + +void SkPaint::setAlphaf(float a) { + fColor4f.fA = SkTPin(a, 0.0f, 1.0f); +} + +void SkPaint::setARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b) { + this->setColor(SkColorSetARGB(a, r, g, b)); +} + +std::optional SkPaint::asBlendMode() const { + return fBlender ? as_BB(fBlender)->asBlendMode() + : SkBlendMode::kSrcOver; +} + +SkBlendMode SkPaint::getBlendMode_or(SkBlendMode defaultMode) const { + return this->asBlendMode().value_or(defaultMode); +} + +bool SkPaint::isSrcOver() const { + return !fBlender || as_BB(fBlender)->asBlendMode() == SkBlendMode::kSrcOver; +} + +void SkPaint::setBlendMode(SkBlendMode mode) { + this->setBlender(mode == SkBlendMode::kSrcOver ? nullptr : SkBlender::Mode(mode)); +} + +void SkPaint::setBlender(sk_sp blender) { + fBlender = std::move(blender); +} + +void SkPaint::setStrokeWidth(SkScalar width) { + if (width >= 0) { + fWidth = width; + } else { +#ifdef SK_REPORT_API_RANGE_CHECK + SkDebugf("SkPaint::setStrokeWidth() called with negative value\n"); +#endif + } +} + +void SkPaint::setStrokeMiter(SkScalar limit) { + if (limit >= 0) { + fMiterLimit = limit; + } else { +#ifdef SK_REPORT_API_RANGE_CHECK + SkDebugf("SkPaint::setStrokeMiter() called with negative value\n"); +#endif + } +} + +void SkPaint::setStrokeCap(Cap ct) { + if ((unsigned)ct < kCapCount) { + fBitfields.fCapType = SkToU8(ct); + } else { +#ifdef SK_REPORT_API_RANGE_CHECK + SkDebugf("SkPaint::setStrokeCap(%d) out of range\n", ct); +#endif + } +} + +void SkPaint::setStrokeJoin(Join jt) { + if ((unsigned)jt < kJoinCount) { + fBitfields.fJoinType = SkToU8(jt); + } else { +#ifdef SK_REPORT_API_RANGE_CHECK + SkDebugf("SkPaint::setStrokeJoin(%d) out of range\n", jt); +#endif + } +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkPaint::canComputeFastBounds() const { + if (this->getImageFilter() && !this->getImageFilter()->canComputeFastBounds()) { + return false; + } + // Pass nullptr for the bounds to determine if they can be computed + if (this->getPathEffect() && + !as_PEB(this->getPathEffect())->computeFastBounds(nullptr)) { + return false; + } + return true; +} + +const SkRect& SkPaint::computeFastBounds(const SkRect& orig, SkRect* storage) const { + // Things like stroking, etc... will do math on the bounds rect, assuming that it's sorted. + SkASSERT(orig.isSorted()); + SkPaint::Style style = this->getStyle(); + // ultra fast-case: filling with no effects that affect geometry + if (kFill_Style == style) { + uintptr_t effects = 0; + effects |= reinterpret_cast(this->getMaskFilter()); + effects |= reinterpret_cast(this->getPathEffect()); + effects |= reinterpret_cast(this->getImageFilter()); + if (!effects) { + return orig; + } + } + + return this->doComputeFastBounds(orig, storage, style); +} + +const SkRect& SkPaint::doComputeFastBounds(const SkRect& origSrc, + SkRect* storage, + Style style) const { + SkASSERT(storage); + + const SkRect* src = &origSrc; + + SkRect tmpSrc; + if (this->getPathEffect()) { + tmpSrc = origSrc; + SkAssertResult(as_PEB(this->getPathEffect())->computeFastBounds(&tmpSrc)); + src = &tmpSrc; + } + + SkScalar radius = SkStrokeRec::GetInflationRadius(*this, style); + *storage = src->makeOutset(radius, radius); + + if (this->getMaskFilter()) { + as_MFB(this->getMaskFilter())->computeFastBounds(*storage, storage); + } + + if (this->getImageFilter()) { + *storage = this->getImageFilter()->computeFastBounds(*storage); + } + + return *storage; +} + +/////////////////////////////////////////////////////////////////////////////// + +// return true if the filter exists, and may affect alpha +static bool affects_alpha(const SkColorFilter* cf) { + return cf && !as_CFB(cf)->isAlphaUnchanged(); +} + +// return true if the filter exists, and may affect alpha +static bool affects_alpha(const SkImageFilter* imf) { + // TODO: check if we should allow imagefilters to broadcast that they don't affect alpha + // ala colorfilters + return imf != nullptr; +} + +bool SkPaint::nothingToDraw() const { + auto bm = this->asBlendMode(); + if (!bm) { + return false; + } + switch (bm.value()) { + case SkBlendMode::kSrcOver: + case SkBlendMode::kSrcATop: + case SkBlendMode::kDstOut: + case SkBlendMode::kDstOver: + case SkBlendMode::kPlus: + if (0 == this->getAlpha()) { + return !affects_alpha(fColorFilter.get()) && !affects_alpha(fImageFilter.get()); + } + break; + case SkBlendMode::kDst: + return true; + default: + break; + } + return false; +} diff --git a/gfx/skia/skia/src/core/SkPaintDefaults.h b/gfx/skia/skia/src/core/SkPaintDefaults.h new file mode 100644 index 0000000000..ce90fd1803 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPaintDefaults.h @@ -0,0 +1,31 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPaintDefaults_DEFINED +#define SkPaintDefaults_DEFINED + +#include "include/core/SkFontTypes.h" + +/** + * Any of these can be specified by the build system (or SkUserConfig.h) + * to change the default values for a SkPaint. This file should not be + * edited directly. + */ + +#ifndef SkPaintDefaults_TextSize + #define SkPaintDefaults_TextSize SkIntToScalar(12) +#endif + +#ifndef SkPaintDefaults_Hinting + #define SkPaintDefaults_Hinting SkFontHinting::kNormal +#endif + +#ifndef SkPaintDefaults_MiterLimit + #define SkPaintDefaults_MiterLimit SkIntToScalar(4) +#endif + +#endif diff --git a/gfx/skia/skia/src/core/SkPaintPriv.cpp b/gfx/skia/skia/src/core/SkPaintPriv.cpp new file mode 100644 index 0000000000..5dc4e67049 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPaintPriv.cpp @@ -0,0 +1,274 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPaint.h" + +#include "src/core/SkBlenderBase.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSafeRange.h" +#include "src/core/SkWriteBuffer.h" +#include "src/core/SkXfermodePriv.h" +#include "src/shaders/SkColorFilterShader.h" +#include "src/shaders/SkShaderBase.h" + +static bool changes_alpha(const SkPaint& paint) { + SkColorFilter* cf = paint.getColorFilter(); + return cf && !as_CFB(cf)->isAlphaUnchanged(); +} + +bool SkPaintPriv::Overwrites(const SkPaint* paint, ShaderOverrideOpacity overrideOpacity) { + if (!paint) { + // No paint means we default to SRC_OVER, so we overwrite iff our shader-override + // is opaque, or we don't have one. + return overrideOpacity != kNotOpaque_ShaderOverrideOpacity; + } + + SkXfermode::SrcColorOpacity opacityType = SkXfermode::kUnknown_SrcColorOpacity; + + if (!changes_alpha(*paint)) { + const unsigned paintAlpha = paint->getAlpha(); + if (0xff == paintAlpha && overrideOpacity != kNotOpaque_ShaderOverrideOpacity && + (!paint->getShader() || paint->getShader()->isOpaque())) + { + opacityType = SkXfermode::kOpaque_SrcColorOpacity; + } else if (0 == paintAlpha) { + if (overrideOpacity == kNone_ShaderOverrideOpacity && !paint->getShader()) { + opacityType = SkXfermode::kTransparentBlack_SrcColorOpacity; + } else { + opacityType = SkXfermode::kTransparentAlpha_SrcColorOpacity; + } + } + } + + const auto bm = paint->asBlendMode(); + if (!bm) { + return false; // don't know for sure, so we play it safe and return false. + } + return SkXfermode::IsOpaque(bm.value(), opacityType); +} + +bool SkPaintPriv::ShouldDither(const SkPaint& p, SkColorType dstCT) { + // The paint dither flag can veto. + if (!p.isDither()) { + return false; + } + + if (dstCT == kUnknown_SkColorType) { + return false; + } + + // We always dither 565 or 4444 when requested. + if (dstCT == kRGB_565_SkColorType || dstCT == kARGB_4444_SkColorType) { + return true; + } + + // Otherwise, dither is only needed for non-const paints. + return p.getImageFilter() || p.getMaskFilter() || + (p.getShader() && !as_SB(p.getShader())->isConstant()); +} + +// return true if the paint is just a single color (i.e. not a shader). If its +// a shader, then we can't compute a const luminance for it :( +static bool just_a_color(const SkPaint& paint, SkColor* color) { + SkColor c = paint.getColor(); + + const auto* shader = as_SB(paint.getShader()); + if (shader && !shader->asLuminanceColor(&c)) { + return false; + } + if (paint.getColorFilter()) { + c = paint.getColorFilter()->filterColor(c); + } + if (color) { + *color = c; + } + return true; +} + +SkColor SkPaintPriv::ComputeLuminanceColor(const SkPaint& paint) { + SkColor c; + if (!just_a_color(paint, &c)) { + c = SkColorSetRGB(0x7F, 0x80, 0x7F); + } + return c; +} + +void SkPaintPriv::RemoveColorFilter(SkPaint* p, SkColorSpace* dstCS) { + if (SkColorFilter* filter = p->getColorFilter()) { + if (SkShader* shader = p->getShader()) { + // SkColorFilterShader will modulate the shader color by paint alpha + // before applying the filter, so we'll reset it to opaque. + p->setShader(sk_make_sp(sk_ref_sp(shader), + p->getAlphaf(), + sk_ref_sp(filter))); + p->setAlphaf(1.0f); + } else { + p->setColor(filter->filterColor4f(p->getColor4f(), sk_srgb_singleton(), dstCS), dstCS); + } + p->setColorFilter(nullptr); + } +} + +#ifdef SK_DEBUG + static void ASSERT_FITS_IN(uint32_t value, int bitCount) { + SkASSERT(bitCount > 0 && bitCount <= 32); + uint32_t mask = ~0U; + mask >>= (32 - bitCount); + SkASSERT(0 == (value & ~mask)); + } +#else + #define ASSERT_FITS_IN(value, bitcount) +#endif + +enum FlatFlags { + kHasTypeface_FlatFlag = 0x1, + kHasEffects_FlatFlag = 0x2, + + kFlatFlagMask = 0x3, +}; + +// SkPaint originally defined flags, some of which now apply to SkFont. These are renames +// of those flags, split into categories depending on which objects they (now) apply to. + +template uint32_t shift_bits(T value, unsigned shift, unsigned bits) { + SkASSERT(shift + bits <= 32); + uint32_t v = static_cast(value); + ASSERT_FITS_IN(v, bits); + return v << shift; +} + +constexpr uint8_t CUSTOM_BLEND_MODE_SENTINEL = 0xFF; + +/* Packing the paint + flags : 8 // 2... + blend : 8 // 30+ + cap : 2 // 3 + join : 2 // 3 + style : 2 // 3 + filter: 2 // 4 + flat : 8 // 1... + total : 32 + */ +static uint32_t pack_v68(const SkPaint& paint, unsigned flatFlags) { + uint32_t packed = 0; + const auto bm = paint.asBlendMode(); + const unsigned mode = bm ? static_cast(bm.value()) + : CUSTOM_BLEND_MODE_SENTINEL; + + packed |= shift_bits(((unsigned)paint.isDither() << 1) | + (unsigned)paint.isAntiAlias(), 0, 8); + packed |= shift_bits(mode, 8, 8); + packed |= shift_bits(paint.getStrokeCap(), 16, 2); + packed |= shift_bits(paint.getStrokeJoin(), 18, 2); + packed |= shift_bits(paint.getStyle(), 20, 2); + packed |= shift_bits(0, 22, 2); // was filterquality + packed |= shift_bits(flatFlags, 24, 8); + return packed; +} + +static uint32_t unpack_v68(SkPaint* paint, uint32_t packed, SkSafeRange& safe) { + paint->setAntiAlias((packed & 1) != 0); + paint->setDither((packed & 2) != 0); + packed >>= 8; + { + unsigned mode = packed & 0xFF; + if (mode != CUSTOM_BLEND_MODE_SENTINEL) { // sentinel for custom blender + paint->setBlendMode(safe.checkLE(mode, SkBlendMode::kLastMode)); + } + // else we will unflatten the custom blender + } + packed >>= 8; + paint->setStrokeCap(safe.checkLE(packed & 0x3, SkPaint::kLast_Cap)); + packed >>= 2; + paint->setStrokeJoin(safe.checkLE(packed & 0x3, SkPaint::kLast_Join)); + packed >>= 2; + paint->setStyle(safe.checkLE(packed & 0x3, SkPaint::kStrokeAndFill_Style)); + packed >>= 2; + // skip the (now ignored) filterquality bits + packed >>= 2; + + return packed; +} + +/* To save space/time, we analyze the paint, and write a truncated version of + it if there are not tricky elements like shaders, etc. + */ +void SkPaintPriv::Flatten(const SkPaint& paint, SkWriteBuffer& buffer) { + uint8_t flatFlags = 0; + + if (paint.getPathEffect() || + paint.getShader() || + paint.getMaskFilter() || + paint.getColorFilter() || + paint.getImageFilter() || + !paint.asBlendMode()) { + flatFlags |= kHasEffects_FlatFlag; + } + + buffer.writeScalar(paint.getStrokeWidth()); + buffer.writeScalar(paint.getStrokeMiter()); + buffer.writeColor4f(paint.getColor4f()); + + buffer.write32(pack_v68(paint, flatFlags)); + + if (flatFlags & kHasEffects_FlatFlag) { + buffer.writeFlattenable(paint.getPathEffect()); + buffer.writeFlattenable(paint.getShader()); + buffer.writeFlattenable(paint.getMaskFilter()); + buffer.writeFlattenable(paint.getColorFilter()); + buffer.writeFlattenable(paint.getImageFilter()); + buffer.writeFlattenable(paint.getBlender()); + } +} + +SkPaint SkPaintPriv::Unflatten(SkReadBuffer& buffer) { + SkPaint paint; + + paint.setStrokeWidth(buffer.readScalar()); + paint.setStrokeMiter(buffer.readScalar()); + { + SkColor4f color; + buffer.readColor4f(&color); + paint.setColor(color, sk_srgb_singleton()); + } + + SkSafeRange safe; + unsigned flatFlags = unpack_v68(&paint, buffer.readUInt(), safe); + + if (!(flatFlags & kHasEffects_FlatFlag)) { + // This is a simple SkPaint without any effects, so clear all the effect-related fields. + paint.setPathEffect(nullptr); + paint.setShader(nullptr); + paint.setMaskFilter(nullptr); + paint.setColorFilter(nullptr); + paint.setImageFilter(nullptr); + } else if (buffer.isVersionLT(SkPicturePriv::kSkBlenderInSkPaint)) { + // This paint predates the introduction of user blend functions (via SkBlender). + paint.setPathEffect(buffer.readPathEffect()); + paint.setShader(buffer.readShader()); + paint.setMaskFilter(buffer.readMaskFilter()); + paint.setColorFilter(buffer.readColorFilter()); + (void)buffer.read32(); // was drawLooper (now deprecated) + paint.setImageFilter(buffer.readImageFilter()); + } else { + paint.setPathEffect(buffer.readPathEffect()); + paint.setShader(buffer.readShader()); + paint.setMaskFilter(buffer.readMaskFilter()); + paint.setColorFilter(buffer.readColorFilter()); + paint.setImageFilter(buffer.readImageFilter()); + paint.setBlender(buffer.readBlender()); + } + + if (!buffer.validate(safe.ok())) { + paint.reset(); + } + return paint; +} diff --git a/gfx/skia/skia/src/core/SkPaintPriv.h b/gfx/skia/skia/src/core/SkPaintPriv.h new file mode 100644 index 0000000000..0d4b5d05b4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPaintPriv.h @@ -0,0 +1,63 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPaintPriv_DEFINED +#define SkPaintPriv_DEFINED + +#include "include/core/SkPaint.h" + +class SkReadBuffer; +class SkWriteBuffer; +enum SkColorType : int; + +class SkPaintPriv { +public: + enum ShaderOverrideOpacity { + kNone_ShaderOverrideOpacity, //!< there is no overriding shader (bitmap or image) + kOpaque_ShaderOverrideOpacity, //!< the overriding shader is opaque + kNotOpaque_ShaderOverrideOpacity, //!< the overriding shader may not be opaque + }; + + /** + * Returns true if drawing with this paint (or nullptr) will ovewrite all affected pixels. + * + * Note: returns conservative true, meaning it may return false even though the paint might + * in fact overwrite its pixels. + */ + static bool Overwrites(const SkPaint* paint, ShaderOverrideOpacity); + + static bool ShouldDither(const SkPaint&, SkColorType); + + /* + * The luminance color is used to determine which Gamma Canonical color to map to. This is + * really only used by backends which want to cache glyph masks, and need some way to know if + * they need to generate new masks based off a given color. + */ + static SkColor ComputeLuminanceColor(const SkPaint&); + + /** Serializes SkPaint into a buffer. A companion unflatten() call + can reconstitute the paint at a later time. + + @param buffer SkWriteBuffer receiving the flattened SkPaint data + */ + static void Flatten(const SkPaint& paint, SkWriteBuffer& buffer); + + /** Populates SkPaint, typically from a serialized stream, created by calling + flatten() at an earlier time. + */ + static SkPaint Unflatten(SkReadBuffer& buffer); + + // If this paint has any color filter, fold it into the shader and/or paint color + // so that it draws the same but getColorFilter() returns nullptr. + // + // Since we may be filtering now, we need to know what color space to filter in, + // typically the color space of the device we're drawing into. + static void RemoveColorFilter(SkPaint*, SkColorSpace* dstCS); + +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPath.cpp b/gfx/skia/skia/src/core/SkPath.cpp new file mode 100644 index 0000000000..2e9cfa9927 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPath.cpp @@ -0,0 +1,3918 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" + +#include "include/core/SkPathBuilder.h" +#include "include/core/SkRRect.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/private/SkPathRef.h" +#include "include/private/base/SkFloatBits.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkPathEnums.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkTLazy.h" +#include "src/base/SkVx.h" +#include "src/core/SkCubicClipper.h" +#include "src/core/SkEdgeClipper.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkPathMakers.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkPointPriv.h" +#include "src/core/SkStringUtils.h" + +#include +#include +#include +#include +#include + +struct SkPath_Storage_Equivalent { + void* fPtr; + int32_t fIndex; + uint32_t fFlags; +}; + +static_assert(sizeof(SkPath) == sizeof(SkPath_Storage_Equivalent), + "Please keep an eye on SkPath packing."); + +static float poly_eval(float A, float B, float C, float t) { + return (A * t + B) * t + C; +} + +static float poly_eval(float A, float B, float C, float D, float t) { + return ((A * t + B) * t + C) * t + D; +} + +//////////////////////////////////////////////////////////////////////////// + +/** + * Path.bounds is defined to be the bounds of all the control points. + * If we called bounds.join(r) we would skip r if r was empty, which breaks + * our promise. Hence we have a custom joiner that doesn't look at emptiness + */ +static void joinNoEmptyChecks(SkRect* dst, const SkRect& src) { + dst->fLeft = std::min(dst->fLeft, src.fLeft); + dst->fTop = std::min(dst->fTop, src.fTop); + dst->fRight = std::max(dst->fRight, src.fRight); + dst->fBottom = std::max(dst->fBottom, src.fBottom); +} + +static bool is_degenerate(const SkPath& path) { + return (path.countVerbs() - SkPathPriv::LeadingMoveToCount(path)) == 0; +} + +class SkAutoDisableDirectionCheck { +public: + SkAutoDisableDirectionCheck(SkPath* path) : fPath(path) { + fSaved = static_cast(fPath->getFirstDirection()); + } + + ~SkAutoDisableDirectionCheck() { + fPath->setFirstDirection(fSaved); + } + +private: + SkPath* fPath; + SkPathFirstDirection fSaved; +}; + +/* This class's constructor/destructor bracket a path editing operation. It is + used when we know the bounds of the amount we are going to add to the path + (usually a new contour, but not required). + + It captures some state about the path up front (i.e. if it already has a + cached bounds), and then if it can, it updates the cache bounds explicitly, + avoiding the need to revisit all of the points in getBounds(). + + It also notes if the path was originally degenerate, and if so, sets + isConvex to true. Thus it can only be used if the contour being added is + convex. + */ +class SkAutoPathBoundsUpdate { +public: + SkAutoPathBoundsUpdate(SkPath* path, const SkRect& r) : fPath(path), fRect(r) { + // Cannot use fRect for our bounds unless we know it is sorted + fRect.sort(); + // Mark the path's bounds as dirty if (1) they are, or (2) the path + // is non-finite, and therefore its bounds are not meaningful + fHasValidBounds = path->hasComputedBounds() && path->isFinite(); + fEmpty = path->isEmpty(); + if (fHasValidBounds && !fEmpty) { + joinNoEmptyChecks(&fRect, fPath->getBounds()); + } + fDegenerate = is_degenerate(*path); + } + + ~SkAutoPathBoundsUpdate() { + fPath->setConvexity(fDegenerate ? SkPathConvexity::kConvex + : SkPathConvexity::kUnknown); + if ((fEmpty || fHasValidBounds) && fRect.isFinite()) { + fPath->setBounds(fRect); + } + } + +private: + SkPath* fPath; + SkRect fRect; + bool fHasValidBounds; + bool fDegenerate; + bool fEmpty; +}; + +//////////////////////////////////////////////////////////////////////////// + +/* + Stores the verbs and points as they are given to us, with exceptions: + - we only record "Close" if it was immediately preceeded by Move | Line | Quad | Cubic + - we insert a Move(0,0) if Line | Quad | Cubic is our first command + + The iterator does more cleanup, especially if forceClose == true + 1. If we encounter degenerate segments, remove them + 2. if we encounter Close, return a cons'd up Line() first (if the curr-pt != start-pt) + 3. if we encounter Move without a preceeding Close, and forceClose is true, goto #2 + 4. if we encounter Line | Quad | Cubic after Close, cons up a Move +*/ + +//////////////////////////////////////////////////////////////////////////// + +// flag to require a moveTo if we begin with something else, like lineTo etc. +// This will also be the value of lastMoveToIndex for a single contour +// ending with close, so countVerbs needs to be checked against 0. +#define INITIAL_LASTMOVETOINDEX_VALUE ~0 + +SkPath::SkPath() + : fPathRef(SkPathRef::CreateEmpty()) { + this->resetFields(); + fIsVolatile = false; +} + +SkPath::SkPath(sk_sp pr, SkPathFillType ft, bool isVolatile, SkPathConvexity ct, + SkPathFirstDirection firstDirection) + : fPathRef(std::move(pr)) + , fLastMoveToIndex(INITIAL_LASTMOVETOINDEX_VALUE) + , fConvexity((uint8_t)ct) + , fFirstDirection((uint8_t)firstDirection) + , fFillType((unsigned)ft) + , fIsVolatile(isVolatile) +{} + +void SkPath::resetFields() { + //fPathRef is assumed to have been emptied by the caller. + fLastMoveToIndex = INITIAL_LASTMOVETOINDEX_VALUE; + fFillType = SkToU8(SkPathFillType::kWinding); + this->setConvexity(SkPathConvexity::kUnknown); + this->setFirstDirection(SkPathFirstDirection::kUnknown); + + // We don't touch Android's fSourcePath. It's used to track texture garbage collection, so we + // don't want to muck with it if it's been set to something non-nullptr. +} + +SkPath::SkPath(const SkPath& that) + : fPathRef(SkRef(that.fPathRef.get())) { + this->copyFields(that); + SkDEBUGCODE(that.validate();) +} + +SkPath::~SkPath() { + SkDEBUGCODE(this->validate();) +} + +SkPath& SkPath::operator=(const SkPath& that) { + SkDEBUGCODE(that.validate();) + + if (this != &that) { + fPathRef.reset(SkRef(that.fPathRef.get())); + this->copyFields(that); + } + SkDEBUGCODE(this->validate();) + return *this; +} + +void SkPath::copyFields(const SkPath& that) { + //fPathRef is assumed to have been set by the caller. + fLastMoveToIndex = that.fLastMoveToIndex; + fFillType = that.fFillType; + fIsVolatile = that.fIsVolatile; + + // Non-atomic assignment of atomic values. + this->setConvexity(that.getConvexityOrUnknown()); + this->setFirstDirection(that.getFirstDirection()); +} + +bool operator==(const SkPath& a, const SkPath& b) { + // note: don't need to look at isConvex or bounds, since just comparing the + // raw data is sufficient. + return &a == &b || + (a.fFillType == b.fFillType && *a.fPathRef == *b.fPathRef); +} + +void SkPath::swap(SkPath& that) { + if (this != &that) { + fPathRef.swap(that.fPathRef); + std::swap(fLastMoveToIndex, that.fLastMoveToIndex); + + const auto ft = fFillType; + fFillType = that.fFillType; + that.fFillType = ft; + + const auto iv = fIsVolatile; + fIsVolatile = that.fIsVolatile; + that.fIsVolatile = iv; + + // Non-atomic swaps of atomic values. + SkPathConvexity c = this->getConvexityOrUnknown(); + this->setConvexity(that.getConvexityOrUnknown()); + that.setConvexity(c); + + SkPathFirstDirection fd = this->getFirstDirection(); + this->setFirstDirection(that.getFirstDirection()); + that.setFirstDirection(fd); + } +} + +bool SkPath::isInterpolatable(const SkPath& compare) const { + // need the same structure (verbs, conicweights) and same point-count + return fPathRef->fPoints.size() == compare.fPathRef->fPoints.size() && + fPathRef->fVerbs == compare.fPathRef->fVerbs && + fPathRef->fConicWeights == compare.fPathRef->fConicWeights; +} + +bool SkPath::interpolate(const SkPath& ending, SkScalar weight, SkPath* out) const { + int pointCount = fPathRef->countPoints(); + if (pointCount != ending.fPathRef->countPoints()) { + return false; + } + if (!pointCount) { + return true; + } + out->reset(); + out->addPath(*this); + fPathRef->interpolate(*ending.fPathRef, weight, out->fPathRef.get()); + return true; +} + +static inline bool check_edge_against_rect(const SkPoint& p0, + const SkPoint& p1, + const SkRect& rect, + SkPathFirstDirection dir) { + const SkPoint* edgeBegin; + SkVector v; + if (SkPathFirstDirection::kCW == dir) { + v = p1 - p0; + edgeBegin = &p0; + } else { + v = p0 - p1; + edgeBegin = &p1; + } + if (v.fX || v.fY) { + // check the cross product of v with the vec from edgeBegin to each rect corner + SkScalar yL = v.fY * (rect.fLeft - edgeBegin->fX); + SkScalar xT = v.fX * (rect.fTop - edgeBegin->fY); + SkScalar yR = v.fY * (rect.fRight - edgeBegin->fX); + SkScalar xB = v.fX * (rect.fBottom - edgeBegin->fY); + if ((xT < yL) || (xT < yR) || (xB < yL) || (xB < yR)) { + return false; + } + } + return true; +} + +bool SkPath::conservativelyContainsRect(const SkRect& rect) const { + // This only handles non-degenerate convex paths currently. + if (!this->isConvex()) { + return false; + } + + SkPathFirstDirection direction = SkPathPriv::ComputeFirstDirection(*this); + if (direction == SkPathFirstDirection::kUnknown) { + return false; + } + + SkPoint firstPt; + SkPoint prevPt; + int segmentCount = 0; + SkDEBUGCODE(int moveCnt = 0;) + + for (auto [verb, pts, weight] : SkPathPriv::Iterate(*this)) { + if (verb == SkPathVerb::kClose || (segmentCount > 0 && verb == SkPathVerb::kMove)) { + // Closing the current contour; but since convexity is a precondition, it's the only + // contour that matters. + SkASSERT(moveCnt); + segmentCount++; + break; + } else if (verb == SkPathVerb::kMove) { + // A move at the start of the contour (or multiple leading moves, in which case we + // keep the last one before a non-move verb). + SkASSERT(!segmentCount); + SkDEBUGCODE(++moveCnt); + firstPt = prevPt = pts[0]; + } else { + int pointCount = SkPathPriv::PtsInVerb((unsigned) verb); + SkASSERT(pointCount > 0); + + if (!SkPathPriv::AllPointsEq(pts, pointCount + 1)) { + SkASSERT(moveCnt); + int nextPt = pointCount; + segmentCount++; + + if (SkPathVerb::kConic == verb) { + SkConic orig; + orig.set(pts, *weight); + SkPoint quadPts[5]; + int count = orig.chopIntoQuadsPOW2(quadPts, 1); + SkASSERT_RELEASE(2 == count); + + if (!check_edge_against_rect(quadPts[0], quadPts[2], rect, direction)) { + return false; + } + if (!check_edge_against_rect(quadPts[2], quadPts[4], rect, direction)) { + return false; + } + } else { + if (!check_edge_against_rect(prevPt, pts[nextPt], rect, direction)) { + return false; + } + } + prevPt = pts[nextPt]; + } + } + } + + if (segmentCount) { + return check_edge_against_rect(prevPt, firstPt, rect, direction); + } + return false; +} + +uint32_t SkPath::getGenerationID() const { + return fPathRef->genID(fFillType); +} + +SkPath& SkPath::reset() { + SkDEBUGCODE(this->validate();) + + if (fPathRef->unique()) { + fPathRef->reset(); + } else { + fPathRef.reset(SkPathRef::CreateEmpty()); + } + this->resetFields(); + return *this; +} + +SkPath& SkPath::rewind() { + SkDEBUGCODE(this->validate();) + + SkPathRef::Rewind(&fPathRef); + this->resetFields(); + return *this; +} + +bool SkPath::isLastContourClosed() const { + int verbCount = fPathRef->countVerbs(); + if (0 == verbCount) { + return false; + } + return kClose_Verb == fPathRef->atVerb(verbCount - 1); +} + +bool SkPath::isLine(SkPoint line[2]) const { + int verbCount = fPathRef->countVerbs(); + + if (2 == verbCount) { + SkASSERT(kMove_Verb == fPathRef->atVerb(0)); + if (kLine_Verb == fPathRef->atVerb(1)) { + SkASSERT(2 == fPathRef->countPoints()); + if (line) { + const SkPoint* pts = fPathRef->points(); + line[0] = pts[0]; + line[1] = pts[1]; + } + return true; + } + } + return false; +} + +bool SkPath::isEmpty() const { + SkDEBUGCODE(this->validate();) + return 0 == fPathRef->countVerbs(); +} + +bool SkPath::isFinite() const { + SkDEBUGCODE(this->validate();) + return fPathRef->isFinite(); +} + +bool SkPath::isConvex() const { + return SkPathConvexity::kConvex == this->getConvexity(); +} + +const SkRect& SkPath::getBounds() const { + return fPathRef->getBounds(); +} + +uint32_t SkPath::getSegmentMasks() const { + return fPathRef->getSegmentMasks(); +} + +bool SkPath::isValid() const { + return this->isValidImpl() && fPathRef->isValid(); +} + +bool SkPath::hasComputedBounds() const { + SkDEBUGCODE(this->validate();) + return fPathRef->hasComputedBounds(); +} + +void SkPath::setBounds(const SkRect& rect) { + SkPathRef::Editor ed(&fPathRef); + ed.setBounds(rect); +} + +SkPathConvexity SkPath::getConvexityOrUnknown() const { + return (SkPathConvexity)fConvexity.load(std::memory_order_relaxed); +} + +#ifdef SK_DEBUG +void SkPath::validate() const { + SkASSERT(this->isValidImpl()); +} + +void SkPath::validateRef() const { + // This will SkASSERT if not valid. + fPathRef->validate(); +} +#endif +/* + Determines if path is a rect by keeping track of changes in direction + and looking for a loop either clockwise or counterclockwise. + + The direction is computed such that: + 0: vertical up + 1: horizontal left + 2: vertical down + 3: horizontal right + +A rectangle cycles up/right/down/left or up/left/down/right. + +The test fails if: + The path is closed, and followed by a line. + A second move creates a new endpoint. + A diagonal line is parsed. + There's more than four changes of direction. + There's a discontinuity on the line (e.g., a move in the middle) + The line reverses direction. + The path contains a quadratic or cubic. + The path contains fewer than four points. + *The rectangle doesn't complete a cycle. + *The final point isn't equal to the first point. + + *These last two conditions we relax if we have a 3-edge path that would + form a rectangle if it were closed (as we do when we fill a path) + +It's OK if the path has: + Several colinear line segments composing a rectangle side. + Single points on the rectangle side. + +The direction takes advantage of the corners found since opposite sides +must travel in opposite directions. + +FIXME: Allow colinear quads and cubics to be treated like lines. +FIXME: If the API passes fill-only, return true if the filled stroke + is a rectangle, though the caller failed to close the path. + + directions values: + 0x1 is set if the segment is horizontal + 0x2 is set if the segment is moving to the right or down + thus: + two directions are opposites iff (dirA ^ dirB) == 0x2 + two directions are perpendicular iff (dirA ^ dirB) == 0x1 + + */ +static int rect_make_dir(SkScalar dx, SkScalar dy) { + return ((0 != dx) << 0) | ((dx > 0 || dy > 0) << 1); +} + +bool SkPath::isRect(SkRect* rect, bool* isClosed, SkPathDirection* direction) const { + SkDEBUGCODE(this->validate();) + int currVerb = 0; + const SkPoint* pts = fPathRef->points(); + return SkPathPriv::IsRectContour(*this, false, &currVerb, &pts, isClosed, direction, rect); +} + +bool SkPath::isOval(SkRect* bounds) const { + return SkPathPriv::IsOval(*this, bounds, nullptr, nullptr); +} + +bool SkPath::isRRect(SkRRect* rrect) const { + return SkPathPriv::IsRRect(*this, rrect, nullptr, nullptr); +} + +int SkPath::countPoints() const { + return fPathRef->countPoints(); +} + +int SkPath::getPoints(SkPoint dst[], int max) const { + SkDEBUGCODE(this->validate();) + + SkASSERT(max >= 0); + SkASSERT(!max || dst); + int count = std::min(max, fPathRef->countPoints()); + sk_careful_memcpy(dst, fPathRef->points(), count * sizeof(SkPoint)); + return fPathRef->countPoints(); +} + +SkPoint SkPath::getPoint(int index) const { + if ((unsigned)index < (unsigned)fPathRef->countPoints()) { + return fPathRef->atPoint(index); + } + return SkPoint::Make(0, 0); +} + +int SkPath::countVerbs() const { + return fPathRef->countVerbs(); +} + +int SkPath::getVerbs(uint8_t dst[], int max) const { + SkDEBUGCODE(this->validate();) + + SkASSERT(max >= 0); + SkASSERT(!max || dst); + int count = std::min(max, fPathRef->countVerbs()); + if (count) { + memcpy(dst, fPathRef->verbsBegin(), count); + } + return fPathRef->countVerbs(); +} + +size_t SkPath::approximateBytesUsed() const { + size_t size = sizeof (SkPath); + if (fPathRef != nullptr) { + size += fPathRef->approximateBytesUsed(); + } + return size; +} + +bool SkPath::getLastPt(SkPoint* lastPt) const { + SkDEBUGCODE(this->validate();) + + int count = fPathRef->countPoints(); + if (count > 0) { + if (lastPt) { + *lastPt = fPathRef->atPoint(count - 1); + } + return true; + } + if (lastPt) { + lastPt->set(0, 0); + } + return false; +} + +void SkPath::setPt(int index, SkScalar x, SkScalar y) { + SkDEBUGCODE(this->validate();) + + int count = fPathRef->countPoints(); + if (count <= index) { + return; + } else { + SkPathRef::Editor ed(&fPathRef); + ed.atPoint(index)->set(x, y); + } +} + +void SkPath::setLastPt(SkScalar x, SkScalar y) { + SkDEBUGCODE(this->validate();) + + int count = fPathRef->countPoints(); + if (count == 0) { + this->moveTo(x, y); + } else { + SkPathRef::Editor ed(&fPathRef); + ed.atPoint(count-1)->set(x, y); + } +} + +// This is the public-facing non-const setConvexity(). +void SkPath::setConvexity(SkPathConvexity c) { + fConvexity.store((uint8_t)c, std::memory_order_relaxed); +} + +// Const hooks for working with fConvexity and fFirstDirection from const methods. +void SkPath::setConvexity(SkPathConvexity c) const { + fConvexity.store((uint8_t)c, std::memory_order_relaxed); +} +void SkPath::setFirstDirection(SkPathFirstDirection d) const { + fFirstDirection.store((uint8_t)d, std::memory_order_relaxed); +} +SkPathFirstDirection SkPath::getFirstDirection() const { + return (SkPathFirstDirection)fFirstDirection.load(std::memory_order_relaxed); +} + +bool SkPath::isConvexityAccurate() const { + SkPathConvexity convexity = this->getConvexityOrUnknown(); + if (convexity != SkPathConvexity::kUnknown) { + auto conv = this->computeConvexity(); + if (conv != convexity) { + SkASSERT(false); + return false; + } + } + return true; +} + +SkPathConvexity SkPath::getConvexity() const { +// Enable once we fix all the bugs +// SkDEBUGCODE(this->isConvexityAccurate()); + SkPathConvexity convexity = this->getConvexityOrUnknown(); + if (convexity == SkPathConvexity::kUnknown) { + convexity = this->computeConvexity(); + } + SkASSERT(convexity != SkPathConvexity::kUnknown); + return convexity; +} + +////////////////////////////////////////////////////////////////////////////// +// Construction methods + +SkPath& SkPath::dirtyAfterEdit() { + this->setConvexity(SkPathConvexity::kUnknown); + this->setFirstDirection(SkPathFirstDirection::kUnknown); + +#ifdef SK_DEBUG + // enable this as needed for testing, but it slows down some chrome tests so much + // that they don't complete, so we don't enable it by default + // e.g. TEST(IdentifiabilityPaintOpDigestTest, MassiveOpSkipped) + if (this->countVerbs() < 16) { + SkASSERT(fPathRef->dataMatchesVerbs()); + } +#endif + + return *this; +} + +void SkPath::incReserve(int inc) { + SkDEBUGCODE(this->validate();) + if (inc > 0) { + SkPathRef::Editor(&fPathRef, inc, inc); + } + SkDEBUGCODE(this->validate();) +} + +SkPath& SkPath::moveTo(SkScalar x, SkScalar y) { + SkDEBUGCODE(this->validate();) + + SkPathRef::Editor ed(&fPathRef); + + // remember our index + fLastMoveToIndex = fPathRef->countPoints(); + + ed.growForVerb(kMove_Verb)->set(x, y); + + return this->dirtyAfterEdit(); +} + +SkPath& SkPath::rMoveTo(SkScalar x, SkScalar y) { + SkPoint pt = {0,0}; + int count = fPathRef->countPoints(); + if (count > 0) { + if (fLastMoveToIndex >= 0) { + pt = fPathRef->atPoint(count - 1); + } else { + pt = fPathRef->atPoint(~fLastMoveToIndex); + } + } + return this->moveTo(pt.fX + x, pt.fY + y); +} + +void SkPath::injectMoveToIfNeeded() { + if (fLastMoveToIndex < 0) { + SkScalar x, y; + if (fPathRef->countVerbs() == 0) { + x = y = 0; + } else { + const SkPoint& pt = fPathRef->atPoint(~fLastMoveToIndex); + x = pt.fX; + y = pt.fY; + } + this->moveTo(x, y); + } +} + +SkPath& SkPath::lineTo(SkScalar x, SkScalar y) { + SkDEBUGCODE(this->validate();) + + this->injectMoveToIfNeeded(); + + SkPathRef::Editor ed(&fPathRef); + ed.growForVerb(kLine_Verb)->set(x, y); + + return this->dirtyAfterEdit(); +} + +SkPath& SkPath::rLineTo(SkScalar x, SkScalar y) { + this->injectMoveToIfNeeded(); // This can change the result of this->getLastPt(). + SkPoint pt; + this->getLastPt(&pt); + return this->lineTo(pt.fX + x, pt.fY + y); +} + +SkPath& SkPath::quadTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2) { + SkDEBUGCODE(this->validate();) + + this->injectMoveToIfNeeded(); + + SkPathRef::Editor ed(&fPathRef); + SkPoint* pts = ed.growForVerb(kQuad_Verb); + pts[0].set(x1, y1); + pts[1].set(x2, y2); + + return this->dirtyAfterEdit(); +} + +SkPath& SkPath::rQuadTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2) { + this->injectMoveToIfNeeded(); // This can change the result of this->getLastPt(). + SkPoint pt; + this->getLastPt(&pt); + return this->quadTo(pt.fX + x1, pt.fY + y1, pt.fX + x2, pt.fY + y2); +} + +SkPath& SkPath::conicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, + SkScalar w) { + // check for <= 0 or NaN with this test + if (!(w > 0)) { + this->lineTo(x2, y2); + } else if (!SkScalarIsFinite(w)) { + this->lineTo(x1, y1); + this->lineTo(x2, y2); + } else if (SK_Scalar1 == w) { + this->quadTo(x1, y1, x2, y2); + } else { + SkDEBUGCODE(this->validate();) + + this->injectMoveToIfNeeded(); + + SkPathRef::Editor ed(&fPathRef); + SkPoint* pts = ed.growForVerb(kConic_Verb, w); + pts[0].set(x1, y1); + pts[1].set(x2, y2); + + (void)this->dirtyAfterEdit(); + } + return *this; +} + +SkPath& SkPath::rConicTo(SkScalar dx1, SkScalar dy1, SkScalar dx2, SkScalar dy2, + SkScalar w) { + this->injectMoveToIfNeeded(); // This can change the result of this->getLastPt(). + SkPoint pt; + this->getLastPt(&pt); + return this->conicTo(pt.fX + dx1, pt.fY + dy1, pt.fX + dx2, pt.fY + dy2, w); +} + +SkPath& SkPath::cubicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, + SkScalar x3, SkScalar y3) { + SkDEBUGCODE(this->validate();) + + this->injectMoveToIfNeeded(); + + SkPathRef::Editor ed(&fPathRef); + SkPoint* pts = ed.growForVerb(kCubic_Verb); + pts[0].set(x1, y1); + pts[1].set(x2, y2); + pts[2].set(x3, y3); + + return this->dirtyAfterEdit(); +} + +SkPath& SkPath::rCubicTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, + SkScalar x3, SkScalar y3) { + this->injectMoveToIfNeeded(); // This can change the result of this->getLastPt(). + SkPoint pt; + this->getLastPt(&pt); + return this->cubicTo(pt.fX + x1, pt.fY + y1, pt.fX + x2, pt.fY + y2, + pt.fX + x3, pt.fY + y3); +} + +SkPath& SkPath::close() { + SkDEBUGCODE(this->validate();) + + int count = fPathRef->countVerbs(); + if (count > 0) { + switch (fPathRef->atVerb(count - 1)) { + case kLine_Verb: + case kQuad_Verb: + case kConic_Verb: + case kCubic_Verb: + case kMove_Verb: { + SkPathRef::Editor ed(&fPathRef); + ed.growForVerb(kClose_Verb); + break; + } + case kClose_Verb: + // don't add a close if it's the first verb or a repeat + break; + default: + SkDEBUGFAIL("unexpected verb"); + break; + } + } + + // signal that we need a moveTo to follow us (unless we're done) +#if 0 + if (fLastMoveToIndex >= 0) { + fLastMoveToIndex = ~fLastMoveToIndex; + } +#else + fLastMoveToIndex ^= ~fLastMoveToIndex >> (8 * sizeof(fLastMoveToIndex) - 1); +#endif + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// + +static void assert_known_direction(SkPathDirection dir) { + SkASSERT(SkPathDirection::kCW == dir || SkPathDirection::kCCW == dir); +} + +SkPath& SkPath::addRect(const SkRect &rect, SkPathDirection dir, unsigned startIndex) { + assert_known_direction(dir); + this->setFirstDirection(this->hasOnlyMoveTos() ? (SkPathFirstDirection)dir + : SkPathFirstDirection::kUnknown); + SkAutoDisableDirectionCheck addc(this); + SkAutoPathBoundsUpdate apbu(this, rect); + + SkDEBUGCODE(int initialVerbCount = this->countVerbs()); + + const int kVerbs = 5; // moveTo + 3x lineTo + close + this->incReserve(kVerbs); + + SkPath_RectPointIterator iter(rect, dir, startIndex); + + this->moveTo(iter.current()); + this->lineTo(iter.next()); + this->lineTo(iter.next()); + this->lineTo(iter.next()); + this->close(); + + SkASSERT(this->countVerbs() == initialVerbCount + kVerbs); + return *this; +} + +SkPath& SkPath::addPoly(const SkPoint pts[], int count, bool close) { + SkDEBUGCODE(this->validate();) + if (count <= 0) { + return *this; + } + + fLastMoveToIndex = fPathRef->countPoints(); + + // +close makes room for the extra kClose_Verb + SkPathRef::Editor ed(&fPathRef, count+close, count); + + ed.growForVerb(kMove_Verb)->set(pts[0].fX, pts[0].fY); + if (count > 1) { + SkPoint* p = ed.growForRepeatedVerb(kLine_Verb, count - 1); + memcpy(p, &pts[1], (count-1) * sizeof(SkPoint)); + } + + if (close) { + ed.growForVerb(kClose_Verb); + fLastMoveToIndex ^= ~fLastMoveToIndex >> (8 * sizeof(fLastMoveToIndex) - 1); + } + + (void)this->dirtyAfterEdit(); + SkDEBUGCODE(this->validate();) + return *this; +} + +static bool arc_is_lone_point(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, + SkPoint* pt) { + if (0 == sweepAngle && (0 == startAngle || SkIntToScalar(360) == startAngle)) { + // Chrome uses this path to move into and out of ovals. If not + // treated as a special case the moves can distort the oval's + // bounding box (and break the circle special case). + pt->set(oval.fRight, oval.centerY()); + return true; + } else if (0 == oval.width() && 0 == oval.height()) { + // Chrome will sometimes create 0 radius round rects. Having degenerate + // quad segments in the path prevents the path from being recognized as + // a rect. + // TODO: optimizing the case where only one of width or height is zero + // should also be considered. This case, however, doesn't seem to be + // as common as the single point case. + pt->set(oval.fRight, oval.fTop); + return true; + } + return false; +} + +// Return the unit vectors pointing at the start/stop points for the given start/sweep angles +// +static void angles_to_unit_vectors(SkScalar startAngle, SkScalar sweepAngle, + SkVector* startV, SkVector* stopV, SkRotationDirection* dir) { + SkScalar startRad = SkDegreesToRadians(startAngle), + stopRad = SkDegreesToRadians(startAngle + sweepAngle); + + startV->fY = SkScalarSinSnapToZero(startRad); + startV->fX = SkScalarCosSnapToZero(startRad); + stopV->fY = SkScalarSinSnapToZero(stopRad); + stopV->fX = SkScalarCosSnapToZero(stopRad); + + /* If the sweep angle is nearly (but less than) 360, then due to precision + loss in radians-conversion and/or sin/cos, we may end up with coincident + vectors, which will fool SkBuildQuadArc into doing nothing (bad) instead + of drawing a nearly complete circle (good). + e.g. canvas.drawArc(0, 359.99, ...) + -vs- canvas.drawArc(0, 359.9, ...) + We try to detect this edge case, and tweak the stop vector + */ + if (*startV == *stopV) { + SkScalar sw = SkScalarAbs(sweepAngle); + if (sw < SkIntToScalar(360) && sw > SkIntToScalar(359)) { + // make a guess at a tiny angle (in radians) to tweak by + SkScalar deltaRad = SkScalarCopySign(SK_Scalar1/512, sweepAngle); + // not sure how much will be enough, so we use a loop + do { + stopRad -= deltaRad; + stopV->fY = SkScalarSinSnapToZero(stopRad); + stopV->fX = SkScalarCosSnapToZero(stopRad); + } while (*startV == *stopV); + } + } + *dir = sweepAngle > 0 ? kCW_SkRotationDirection : kCCW_SkRotationDirection; +} + +/** + * If this returns 0, then the caller should just line-to the singlePt, else it should + * ignore singlePt and append the specified number of conics. + */ +static int build_arc_conics(const SkRect& oval, const SkVector& start, const SkVector& stop, + SkRotationDirection dir, SkConic conics[SkConic::kMaxConicsForArc], + SkPoint* singlePt) { + SkMatrix matrix; + + matrix.setScale(SkScalarHalf(oval.width()), SkScalarHalf(oval.height())); + matrix.postTranslate(oval.centerX(), oval.centerY()); + + int count = SkConic::BuildUnitArc(start, stop, dir, &matrix, conics); + if (0 == count) { + matrix.mapXY(stop.x(), stop.y(), singlePt); + } + return count; +} + +SkPath& SkPath::addRoundRect(const SkRect& rect, const SkScalar radii[], + SkPathDirection dir) { + SkRRect rrect; + rrect.setRectRadii(rect, (const SkVector*) radii); + return this->addRRect(rrect, dir); +} + +SkPath& SkPath::addRRect(const SkRRect& rrect, SkPathDirection dir) { + // legacy start indices: 6 (CW) and 7(CCW) + return this->addRRect(rrect, dir, dir == SkPathDirection::kCW ? 6 : 7); +} + +SkPath& SkPath::addRRect(const SkRRect &rrect, SkPathDirection dir, unsigned startIndex) { + assert_known_direction(dir); + + bool isRRect = hasOnlyMoveTos(); + const SkRect& bounds = rrect.getBounds(); + + if (rrect.isRect() || rrect.isEmpty()) { + // degenerate(rect) => radii points are collapsing + this->addRect(bounds, dir, (startIndex + 1) / 2); + } else if (rrect.isOval()) { + // degenerate(oval) => line points are collapsing + this->addOval(bounds, dir, startIndex / 2); + } else { + this->setFirstDirection(this->hasOnlyMoveTos() ? (SkPathFirstDirection)dir + : SkPathFirstDirection::kUnknown); + + SkAutoPathBoundsUpdate apbu(this, bounds); + SkAutoDisableDirectionCheck addc(this); + + // we start with a conic on odd indices when moving CW vs. even indices when moving CCW + const bool startsWithConic = ((startIndex & 1) == (dir == SkPathDirection::kCW)); + const SkScalar weight = SK_ScalarRoot2Over2; + + SkDEBUGCODE(int initialVerbCount = this->countVerbs()); + const int kVerbs = startsWithConic + ? 9 // moveTo + 4x conicTo + 3x lineTo + close + : 10; // moveTo + 4x lineTo + 4x conicTo + close + this->incReserve(kVerbs); + + SkPath_RRectPointIterator rrectIter(rrect, dir, startIndex); + // Corner iterator indices follow the collapsed radii model, + // adjusted such that the start pt is "behind" the radii start pt. + const unsigned rectStartIndex = startIndex / 2 + (dir == SkPathDirection::kCW ? 0 : 1); + SkPath_RectPointIterator rectIter(bounds, dir, rectStartIndex); + + this->moveTo(rrectIter.current()); + if (startsWithConic) { + for (unsigned i = 0; i < 3; ++i) { + this->conicTo(rectIter.next(), rrectIter.next(), weight); + this->lineTo(rrectIter.next()); + } + this->conicTo(rectIter.next(), rrectIter.next(), weight); + // final lineTo handled by close(). + } else { + for (unsigned i = 0; i < 4; ++i) { + this->lineTo(rrectIter.next()); + this->conicTo(rectIter.next(), rrectIter.next(), weight); + } + } + this->close(); + + SkPathRef::Editor ed(&fPathRef); + ed.setIsRRect(isRRect, dir == SkPathDirection::kCCW, startIndex % 8); + + SkASSERT(this->countVerbs() == initialVerbCount + kVerbs); + } + + SkDEBUGCODE(fPathRef->validate();) + return *this; +} + +bool SkPath::hasOnlyMoveTos() const { + int count = fPathRef->countVerbs(); + const uint8_t* verbs = fPathRef->verbsBegin(); + for (int i = 0; i < count; ++i) { + if (*verbs == kLine_Verb || + *verbs == kQuad_Verb || + *verbs == kConic_Verb || + *verbs == kCubic_Verb) { + return false; + } + ++verbs; + } + return true; +} + +bool SkPath::isZeroLengthSincePoint(int startPtIndex) const { + int count = fPathRef->countPoints() - startPtIndex; + if (count < 2) { + return true; + } + const SkPoint* pts = fPathRef->points() + startPtIndex; + const SkPoint& first = *pts; + for (int index = 1; index < count; ++index) { + if (first != pts[index]) { + return false; + } + } + return true; +} + +SkPath& SkPath::addRoundRect(const SkRect& rect, SkScalar rx, SkScalar ry, + SkPathDirection dir) { + assert_known_direction(dir); + + if (rx < 0 || ry < 0) { + return *this; + } + + SkRRect rrect; + rrect.setRectXY(rect, rx, ry); + return this->addRRect(rrect, dir); +} + +SkPath& SkPath::addOval(const SkRect& oval, SkPathDirection dir) { + // legacy start index: 1 + return this->addOval(oval, dir, 1); +} + +SkPath& SkPath::addOval(const SkRect &oval, SkPathDirection dir, unsigned startPointIndex) { + assert_known_direction(dir); + + /* If addOval() is called after previous moveTo(), + this path is still marked as an oval. This is used to + fit into WebKit's calling sequences. + We can't simply check isEmpty() in this case, as additional + moveTo() would mark the path non empty. + */ + bool isOval = hasOnlyMoveTos(); + if (isOval) { + this->setFirstDirection((SkPathFirstDirection)dir); + } else { + this->setFirstDirection(SkPathFirstDirection::kUnknown); + } + + SkAutoDisableDirectionCheck addc(this); + SkAutoPathBoundsUpdate apbu(this, oval); + + SkDEBUGCODE(int initialVerbCount = this->countVerbs()); + const int kVerbs = 6; // moveTo + 4x conicTo + close + this->incReserve(kVerbs); + + SkPath_OvalPointIterator ovalIter(oval, dir, startPointIndex); + // The corner iterator pts are tracking "behind" the oval/radii pts. + SkPath_RectPointIterator rectIter(oval, dir, startPointIndex + (dir == SkPathDirection::kCW ? 0 : 1)); + const SkScalar weight = SK_ScalarRoot2Over2; + + this->moveTo(ovalIter.current()); + for (unsigned i = 0; i < 4; ++i) { + this->conicTo(rectIter.next(), ovalIter.next(), weight); + } + this->close(); + + SkASSERT(this->countVerbs() == initialVerbCount + kVerbs); + + SkPathRef::Editor ed(&fPathRef); + + ed.setIsOval(isOval, SkPathDirection::kCCW == dir, startPointIndex % 4); + return *this; +} + +SkPath& SkPath::addCircle(SkScalar x, SkScalar y, SkScalar r, SkPathDirection dir) { + if (r > 0) { + this->addOval(SkRect::MakeLTRB(x - r, y - r, x + r, y + r), dir); + } + return *this; +} + +SkPath& SkPath::arcTo(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, + bool forceMoveTo) { + if (oval.width() < 0 || oval.height() < 0) { + return *this; + } + + startAngle = SkScalarMod(startAngle, 360.0f); + + if (fPathRef->countVerbs() == 0) { + forceMoveTo = true; + } + + SkPoint lonePt; + if (arc_is_lone_point(oval, startAngle, sweepAngle, &lonePt)) { + return forceMoveTo ? this->moveTo(lonePt) : this->lineTo(lonePt); + } + + SkVector startV, stopV; + SkRotationDirection dir; + angles_to_unit_vectors(startAngle, sweepAngle, &startV, &stopV, &dir); + + SkPoint singlePt; + + // Adds a move-to to 'pt' if forceMoveTo is true. Otherwise a lineTo unless we're sufficiently + // close to 'pt' currently. This prevents spurious lineTos when adding a series of contiguous + // arcs from the same oval. + auto addPt = [&forceMoveTo, this](const SkPoint& pt) { + SkPoint lastPt; + if (forceMoveTo) { + this->moveTo(pt); + } else if (!this->getLastPt(&lastPt) || + !SkScalarNearlyEqual(lastPt.fX, pt.fX) || + !SkScalarNearlyEqual(lastPt.fY, pt.fY)) { + this->lineTo(pt); + } + }; + + // At this point, we know that the arc is not a lone point, but startV == stopV + // indicates that the sweepAngle is too small such that angles_to_unit_vectors + // cannot handle it. + if (startV == stopV) { + SkScalar endAngle = SkDegreesToRadians(startAngle + sweepAngle); + SkScalar radiusX = oval.width() / 2; + SkScalar radiusY = oval.height() / 2; + // We do not use SkScalar[Sin|Cos]SnapToZero here. When sin(startAngle) is 0 and sweepAngle + // is very small and radius is huge, the expected behavior here is to draw a line. But + // calling SkScalarSinSnapToZero will make sin(endAngle) be 0 which will then draw a dot. + singlePt.set(oval.centerX() + radiusX * SkScalarCos(endAngle), + oval.centerY() + radiusY * SkScalarSin(endAngle)); + addPt(singlePt); + return *this; + } + + SkConic conics[SkConic::kMaxConicsForArc]; + int count = build_arc_conics(oval, startV, stopV, dir, conics, &singlePt); + if (count) { + this->incReserve(count * 2 + 1); + const SkPoint& pt = conics[0].fPts[0]; + addPt(pt); + for (int i = 0; i < count; ++i) { + this->conicTo(conics[i].fPts[1], conics[i].fPts[2], conics[i].fW); + } + } else { + addPt(singlePt); + } + return *this; +} + +// This converts the SVG arc to conics. +// Partly adapted from Niko's code in kdelibs/kdecore/svgicons. +// Then transcribed from webkit/chrome's SVGPathNormalizer::decomposeArcToCubic() +// See also SVG implementation notes: +// http://www.w3.org/TR/SVG/implnote.html#ArcConversionEndpointToCenter +// Note that arcSweep bool value is flipped from the original implementation. +SkPath& SkPath::arcTo(SkScalar rx, SkScalar ry, SkScalar angle, SkPath::ArcSize arcLarge, + SkPathDirection arcSweep, SkScalar x, SkScalar y) { + this->injectMoveToIfNeeded(); + SkPoint srcPts[2]; + this->getLastPt(&srcPts[0]); + // If rx = 0 or ry = 0 then this arc is treated as a straight line segment (a "lineto") + // joining the endpoints. + // http://www.w3.org/TR/SVG/implnote.html#ArcOutOfRangeParameters + if (!rx || !ry) { + return this->lineTo(x, y); + } + // If the current point and target point for the arc are identical, it should be treated as a + // zero length path. This ensures continuity in animations. + srcPts[1].set(x, y); + if (srcPts[0] == srcPts[1]) { + return this->lineTo(x, y); + } + rx = SkScalarAbs(rx); + ry = SkScalarAbs(ry); + SkVector midPointDistance = srcPts[0] - srcPts[1]; + midPointDistance *= 0.5f; + + SkMatrix pointTransform; + pointTransform.setRotate(-angle); + + SkPoint transformedMidPoint; + pointTransform.mapPoints(&transformedMidPoint, &midPointDistance, 1); + SkScalar squareRx = rx * rx; + SkScalar squareRy = ry * ry; + SkScalar squareX = transformedMidPoint.fX * transformedMidPoint.fX; + SkScalar squareY = transformedMidPoint.fY * transformedMidPoint.fY; + + // Check if the radii are big enough to draw the arc, scale radii if not. + // http://www.w3.org/TR/SVG/implnote.html#ArcCorrectionOutOfRangeRadii + SkScalar radiiScale = squareX / squareRx + squareY / squareRy; + if (radiiScale > 1) { + radiiScale = SkScalarSqrt(radiiScale); + rx *= radiiScale; + ry *= radiiScale; + } + + pointTransform.setScale(1 / rx, 1 / ry); + pointTransform.preRotate(-angle); + + SkPoint unitPts[2]; + pointTransform.mapPoints(unitPts, srcPts, (int) std::size(unitPts)); + SkVector delta = unitPts[1] - unitPts[0]; + + SkScalar d = delta.fX * delta.fX + delta.fY * delta.fY; + SkScalar scaleFactorSquared = std::max(1 / d - 0.25f, 0.f); + + SkScalar scaleFactor = SkScalarSqrt(scaleFactorSquared); + if ((arcSweep == SkPathDirection::kCCW) != SkToBool(arcLarge)) { // flipped from the original implementation + scaleFactor = -scaleFactor; + } + delta.scale(scaleFactor); + SkPoint centerPoint = unitPts[0] + unitPts[1]; + centerPoint *= 0.5f; + centerPoint.offset(-delta.fY, delta.fX); + unitPts[0] -= centerPoint; + unitPts[1] -= centerPoint; + SkScalar theta1 = SkScalarATan2(unitPts[0].fY, unitPts[0].fX); + SkScalar theta2 = SkScalarATan2(unitPts[1].fY, unitPts[1].fX); + SkScalar thetaArc = theta2 - theta1; + if (thetaArc < 0 && (arcSweep == SkPathDirection::kCW)) { // arcSweep flipped from the original implementation + thetaArc += SK_ScalarPI * 2; + } else if (thetaArc > 0 && (arcSweep != SkPathDirection::kCW)) { // arcSweep flipped from the original implementation + thetaArc -= SK_ScalarPI * 2; + } + + // Very tiny angles cause our subsequent math to go wonky (skbug.com/9272) + // so we do a quick check here. The precise tolerance amount is just made up. + // PI/million happens to fix the bug in 9272, but a larger value is probably + // ok too. + if (SkScalarAbs(thetaArc) < (SK_ScalarPI / (1000 * 1000))) { + return this->lineTo(x, y); + } + + pointTransform.setRotate(angle); + pointTransform.preScale(rx, ry); + + // the arc may be slightly bigger than 1/4 circle, so allow up to 1/3rd + int segments = SkScalarCeilToInt(SkScalarAbs(thetaArc / (2 * SK_ScalarPI / 3))); + SkScalar thetaWidth = thetaArc / segments; + SkScalar t = SkScalarTan(0.5f * thetaWidth); + if (!SkScalarIsFinite(t)) { + return *this; + } + SkScalar startTheta = theta1; + SkScalar w = SkScalarSqrt(SK_ScalarHalf + SkScalarCos(thetaWidth) * SK_ScalarHalf); + auto scalar_is_integer = [](SkScalar scalar) -> bool { + return scalar == SkScalarFloorToScalar(scalar); + }; + bool expectIntegers = SkScalarNearlyZero(SK_ScalarPI/2 - SkScalarAbs(thetaWidth)) && + scalar_is_integer(rx) && scalar_is_integer(ry) && + scalar_is_integer(x) && scalar_is_integer(y); + + for (int i = 0; i < segments; ++i) { + SkScalar endTheta = startTheta + thetaWidth, + sinEndTheta = SkScalarSinSnapToZero(endTheta), + cosEndTheta = SkScalarCosSnapToZero(endTheta); + + unitPts[1].set(cosEndTheta, sinEndTheta); + unitPts[1] += centerPoint; + unitPts[0] = unitPts[1]; + unitPts[0].offset(t * sinEndTheta, -t * cosEndTheta); + SkPoint mapped[2]; + pointTransform.mapPoints(mapped, unitPts, (int) std::size(unitPts)); + /* + Computing the arc width introduces rounding errors that cause arcs to start + outside their marks. A round rect may lose convexity as a result. If the input + values are on integers, place the conic on integers as well. + */ + if (expectIntegers) { + for (SkPoint& point : mapped) { + point.fX = SkScalarRoundToScalar(point.fX); + point.fY = SkScalarRoundToScalar(point.fY); + } + } + this->conicTo(mapped[0], mapped[1], w); + startTheta = endTheta; + } + + // The final point should match the input point (by definition); replace it to + // ensure that rounding errors in the above math don't cause any problems. + this->setLastPt(x, y); + return *this; +} + +SkPath& SkPath::rArcTo(SkScalar rx, SkScalar ry, SkScalar xAxisRotate, SkPath::ArcSize largeArc, + SkPathDirection sweep, SkScalar dx, SkScalar dy) { + SkPoint currentPoint; + this->getLastPt(¤tPoint); + return this->arcTo(rx, ry, xAxisRotate, largeArc, sweep, + currentPoint.fX + dx, currentPoint.fY + dy); +} + +SkPath& SkPath::addArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle) { + if (oval.isEmpty() || 0 == sweepAngle) { + return *this; + } + + const SkScalar kFullCircleAngle = SkIntToScalar(360); + + if (sweepAngle >= kFullCircleAngle || sweepAngle <= -kFullCircleAngle) { + // We can treat the arc as an oval if it begins at one of our legal starting positions. + // See SkPath::addOval() docs. + SkScalar startOver90 = startAngle / 90.f; + SkScalar startOver90I = SkScalarRoundToScalar(startOver90); + SkScalar error = startOver90 - startOver90I; + if (SkScalarNearlyEqual(error, 0)) { + // Index 1 is at startAngle == 0. + SkScalar startIndex = std::fmod(startOver90I + 1.f, 4.f); + startIndex = startIndex < 0 ? startIndex + 4.f : startIndex; + return this->addOval(oval, sweepAngle > 0 ? SkPathDirection::kCW : SkPathDirection::kCCW, + (unsigned) startIndex); + } + } + return this->arcTo(oval, startAngle, sweepAngle, true); +} + +/* + Need to handle the case when the angle is sharp, and our computed end-points + for the arc go behind pt1 and/or p2... +*/ +SkPath& SkPath::arcTo(SkScalar x1, SkScalar y1, SkScalar x2, SkScalar y2, SkScalar radius) { + this->injectMoveToIfNeeded(); + + if (radius == 0) { + return this->lineTo(x1, y1); + } + + // need to know our prev pt so we can construct tangent vectors + SkPoint start; + this->getLastPt(&start); + + // need double precision for these calcs. + skvx::double2 befored = normalize(skvx::double2{x1 - start.fX, y1 - start.fY}); + skvx::double2 afterd = normalize(skvx::double2{x2 - x1, y2 - y1}); + double cosh = dot(befored, afterd); + double sinh = cross(befored, afterd); + + // If the previous point equals the first point, befored will be denormalized. + // If the two points equal, afterd will be denormalized. + // If the second point equals the first point, sinh will be zero. + // In all these cases, we cannot construct an arc, so we construct a line to the first point. + if (!isfinite(befored) || !isfinite(afterd) || SkScalarNearlyZero(SkDoubleToScalar(sinh))) { + return this->lineTo(x1, y1); + } + + // safe to convert back to floats now + SkScalar dist = SkScalarAbs(SkDoubleToScalar(radius * (1 - cosh) / sinh)); + SkScalar xx = x1 - dist * befored[0]; + SkScalar yy = y1 - dist * befored[1]; + + SkVector after = SkVector::Make(afterd[0], afterd[1]); + after.setLength(dist); + this->lineTo(xx, yy); + SkScalar weight = SkScalarSqrt(SkDoubleToScalar(SK_ScalarHalf + cosh * 0.5)); + return this->conicTo(x1, y1, x1 + after.fX, y1 + after.fY, weight); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkPath& SkPath::addPath(const SkPath& path, SkScalar dx, SkScalar dy, AddPathMode mode) { + SkMatrix matrix; + + matrix.setTranslate(dx, dy); + return this->addPath(path, matrix, mode); +} + +SkPath& SkPath::addPath(const SkPath& srcPath, const SkMatrix& matrix, AddPathMode mode) { + if (srcPath.isEmpty()) { + return *this; + } + + // Detect if we're trying to add ourself + const SkPath* src = &srcPath; + SkTLazy tmp; + if (this == src) { + src = tmp.set(srcPath); + } + + if (kAppend_AddPathMode == mode && !matrix.hasPerspective()) { + fLastMoveToIndex = this->countPoints() + src->fLastMoveToIndex; + + SkPathRef::Editor ed(&fPathRef); + auto [newPts, newWeights] = ed.growForVerbsInPath(*src->fPathRef); + matrix.mapPoints(newPts, src->fPathRef->points(), src->countPoints()); + if (int numWeights = src->fPathRef->countWeights()) { + memcpy(newWeights, src->fPathRef->conicWeights(), numWeights * sizeof(newWeights[0])); + } + // fiddle with fLastMoveToIndex, as we do in SkPath::close() + if ((SkPathVerb)fPathRef->verbsEnd()[-1] == SkPathVerb::kClose) { + fLastMoveToIndex ^= ~fLastMoveToIndex >> (8 * sizeof(fLastMoveToIndex) - 1); + } + return this->dirtyAfterEdit(); + } + + SkMatrixPriv::MapPtsProc mapPtsProc = SkMatrixPriv::GetMapPtsProc(matrix); + bool firstVerb = true; + for (auto [verb, pts, w] : SkPathPriv::Iterate(*src)) { + SkPoint mappedPts[3]; + switch (verb) { + case SkPathVerb::kMove: + mapPtsProc(matrix, mappedPts, &pts[0], 1); + if (firstVerb && mode == kExtend_AddPathMode && !isEmpty()) { + injectMoveToIfNeeded(); // In case last contour is closed + SkPoint lastPt; + // don't add lineTo if it is degenerate + if (fLastMoveToIndex < 0 || !this->getLastPt(&lastPt) || + lastPt != mappedPts[0]) { + this->lineTo(mappedPts[0]); + } + } else { + this->moveTo(mappedPts[0]); + } + break; + case SkPathVerb::kLine: + mapPtsProc(matrix, mappedPts, &pts[1], 1); + this->lineTo(mappedPts[0]); + break; + case SkPathVerb::kQuad: + mapPtsProc(matrix, mappedPts, &pts[1], 2); + this->quadTo(mappedPts[0], mappedPts[1]); + break; + case SkPathVerb::kConic: + mapPtsProc(matrix, mappedPts, &pts[1], 2); + this->conicTo(mappedPts[0], mappedPts[1], *w); + break; + case SkPathVerb::kCubic: + mapPtsProc(matrix, mappedPts, &pts[1], 3); + this->cubicTo(mappedPts[0], mappedPts[1], mappedPts[2]); + break; + case SkPathVerb::kClose: + this->close(); + break; + } + firstVerb = false; + } + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// + +// ignore the last point of the 1st contour +SkPath& SkPath::reversePathTo(const SkPath& path) { + if (path.fPathRef->fVerbs.empty()) { + return *this; + } + + const uint8_t* verbs = path.fPathRef->verbsEnd(); + const uint8_t* verbsBegin = path.fPathRef->verbsBegin(); + SkASSERT(verbsBegin[0] == kMove_Verb); + const SkPoint* pts = path.fPathRef->pointsEnd() - 1; + const SkScalar* conicWeights = path.fPathRef->conicWeightsEnd(); + + while (verbs > verbsBegin) { + uint8_t v = *--verbs; + pts -= SkPathPriv::PtsInVerb(v); + switch (v) { + case kMove_Verb: + // if the path has multiple contours, stop after reversing the last + return *this; + case kLine_Verb: + this->lineTo(pts[0]); + break; + case kQuad_Verb: + this->quadTo(pts[1], pts[0]); + break; + case kConic_Verb: + this->conicTo(pts[1], pts[0], *--conicWeights); + break; + case kCubic_Verb: + this->cubicTo(pts[2], pts[1], pts[0]); + break; + case kClose_Verb: + break; + default: + SkDEBUGFAIL("bad verb"); + break; + } + } + return *this; +} + +SkPath& SkPath::reverseAddPath(const SkPath& srcPath) { + // Detect if we're trying to add ourself + const SkPath* src = &srcPath; + SkTLazy tmp; + if (this == src) { + src = tmp.set(srcPath); + } + + const uint8_t* verbsBegin = src->fPathRef->verbsBegin(); + const uint8_t* verbs = src->fPathRef->verbsEnd(); + const SkPoint* pts = src->fPathRef->pointsEnd(); + const SkScalar* conicWeights = src->fPathRef->conicWeightsEnd(); + + bool needMove = true; + bool needClose = false; + while (verbs > verbsBegin) { + uint8_t v = *--verbs; + int n = SkPathPriv::PtsInVerb(v); + + if (needMove) { + --pts; + this->moveTo(pts->fX, pts->fY); + needMove = false; + } + pts -= n; + switch (v) { + case kMove_Verb: + if (needClose) { + this->close(); + needClose = false; + } + needMove = true; + pts += 1; // so we see the point in "if (needMove)" above + break; + case kLine_Verb: + this->lineTo(pts[0]); + break; + case kQuad_Verb: + this->quadTo(pts[1], pts[0]); + break; + case kConic_Verb: + this->conicTo(pts[1], pts[0], *--conicWeights); + break; + case kCubic_Verb: + this->cubicTo(pts[2], pts[1], pts[0]); + break; + case kClose_Verb: + needClose = true; + break; + default: + SkDEBUGFAIL("unexpected verb"); + } + } + return *this; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkPath::offset(SkScalar dx, SkScalar dy, SkPath* dst) const { + SkMatrix matrix; + + matrix.setTranslate(dx, dy); + this->transform(matrix, dst); +} + +static void subdivide_cubic_to(SkPath* path, const SkPoint pts[4], + int level = 2) { + if (--level >= 0) { + SkPoint tmp[7]; + + SkChopCubicAtHalf(pts, tmp); + subdivide_cubic_to(path, &tmp[0], level); + subdivide_cubic_to(path, &tmp[3], level); + } else { + path->cubicTo(pts[1], pts[2], pts[3]); + } +} + +void SkPath::transform(const SkMatrix& matrix, SkPath* dst, SkApplyPerspectiveClip pc) const { + if (matrix.isIdentity()) { + if (dst != nullptr && dst != this) { + *dst = *this; + } + return; + } + + SkDEBUGCODE(this->validate();) + if (dst == nullptr) { + dst = (SkPath*)this; + } + + if (matrix.hasPerspective()) { + SkPath tmp; + tmp.fFillType = fFillType; + + SkPath clipped; + const SkPath* src = this; + if (pc == SkApplyPerspectiveClip::kYes && + SkPathPriv::PerspectiveClip(*this, matrix, &clipped)) + { + src = &clipped; + } + + SkPath::Iter iter(*src, false); + SkPoint pts[4]; + SkPath::Verb verb; + + while ((verb = iter.next(pts)) != kDone_Verb) { + switch (verb) { + case kMove_Verb: + tmp.moveTo(pts[0]); + break; + case kLine_Verb: + tmp.lineTo(pts[1]); + break; + case kQuad_Verb: + // promote the quad to a conic + tmp.conicTo(pts[1], pts[2], + SkConic::TransformW(pts, SK_Scalar1, matrix)); + break; + case kConic_Verb: + tmp.conicTo(pts[1], pts[2], + SkConic::TransformW(pts, iter.conicWeight(), matrix)); + break; + case kCubic_Verb: + subdivide_cubic_to(&tmp, pts); + break; + case kClose_Verb: + tmp.close(); + break; + default: + SkDEBUGFAIL("unknown verb"); + break; + } + } + + dst->swap(tmp); + SkPathRef::Editor ed(&dst->fPathRef); + matrix.mapPoints(ed.writablePoints(), ed.pathRef()->countPoints()); + dst->setFirstDirection(SkPathFirstDirection::kUnknown); + } else { + SkPathConvexity convexity = this->getConvexityOrUnknown(); + + SkPathRef::CreateTransformedCopy(&dst->fPathRef, *fPathRef, matrix); + + if (this != dst) { + dst->fLastMoveToIndex = fLastMoveToIndex; + dst->fFillType = fFillType; + dst->fIsVolatile = fIsVolatile; + } + + // Due to finite/fragile float numerics, we can't assume that a convex path remains + // convex after a transformation, so mark it as unknown here. + // However, some transformations are thought to be safe: + // axis-aligned values under scale/translate. + // + if (convexity == SkPathConvexity::kConvex && + (!matrix.isScaleTranslate() || !SkPathPriv::IsAxisAligned(*this))) { + // Not safe to still assume we're convex... + convexity = SkPathConvexity::kUnknown; + } + dst->setConvexity(convexity); + + if (this->getFirstDirection() == SkPathFirstDirection::kUnknown) { + dst->setFirstDirection(SkPathFirstDirection::kUnknown); + } else { + SkScalar det2x2 = + matrix.get(SkMatrix::kMScaleX) * matrix.get(SkMatrix::kMScaleY) - + matrix.get(SkMatrix::kMSkewX) * matrix.get(SkMatrix::kMSkewY); + if (det2x2 < 0) { + dst->setFirstDirection( + SkPathPriv::OppositeFirstDirection( + (SkPathFirstDirection)this->getFirstDirection())); + } else if (det2x2 > 0) { + dst->setFirstDirection(this->getFirstDirection()); + } else { + dst->setFirstDirection(SkPathFirstDirection::kUnknown); + } + } + + SkDEBUGCODE(dst->validate();) + } +} + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// + +SkPath::Iter::Iter() { +#ifdef SK_DEBUG + fPts = nullptr; + fConicWeights = nullptr; + fMoveTo.fX = fMoveTo.fY = fLastPt.fX = fLastPt.fY = 0; + fForceClose = fCloseLine = false; +#endif + // need to init enough to make next() harmlessly return kDone_Verb + fVerbs = nullptr; + fVerbStop = nullptr; + fNeedClose = false; +} + +SkPath::Iter::Iter(const SkPath& path, bool forceClose) { + this->setPath(path, forceClose); +} + +void SkPath::Iter::setPath(const SkPath& path, bool forceClose) { + fPts = path.fPathRef->points(); + fVerbs = path.fPathRef->verbsBegin(); + fVerbStop = path.fPathRef->verbsEnd(); + fConicWeights = path.fPathRef->conicWeights(); + if (fConicWeights) { + fConicWeights -= 1; // begin one behind + } + fLastPt.fX = fLastPt.fY = 0; + fMoveTo.fX = fMoveTo.fY = 0; + fForceClose = SkToU8(forceClose); + fNeedClose = false; +} + +bool SkPath::Iter::isClosedContour() const { + if (fVerbs == nullptr || fVerbs == fVerbStop) { + return false; + } + if (fForceClose) { + return true; + } + + const uint8_t* verbs = fVerbs; + const uint8_t* stop = fVerbStop; + + if (kMove_Verb == *verbs) { + verbs += 1; // skip the initial moveto + } + + while (verbs < stop) { + // verbs points one beyond the current verb, decrement first. + unsigned v = *verbs++; + if (kMove_Verb == v) { + break; + } + if (kClose_Verb == v) { + return true; + } + } + return false; +} + +SkPath::Verb SkPath::Iter::autoClose(SkPoint pts[2]) { + SkASSERT(pts); + if (fLastPt != fMoveTo) { + // A special case: if both points are NaN, SkPoint::operation== returns + // false, but the iterator expects that they are treated as the same. + // (consider SkPoint is a 2-dimension float point). + if (SkScalarIsNaN(fLastPt.fX) || SkScalarIsNaN(fLastPt.fY) || + SkScalarIsNaN(fMoveTo.fX) || SkScalarIsNaN(fMoveTo.fY)) { + return kClose_Verb; + } + + pts[0] = fLastPt; + pts[1] = fMoveTo; + fLastPt = fMoveTo; + fCloseLine = true; + return kLine_Verb; + } else { + pts[0] = fMoveTo; + return kClose_Verb; + } +} + +SkPath::Verb SkPath::Iter::next(SkPoint ptsParam[4]) { + SkASSERT(ptsParam); + + if (fVerbs == fVerbStop) { + // Close the curve if requested and if there is some curve to close + if (fNeedClose) { + if (kLine_Verb == this->autoClose(ptsParam)) { + return kLine_Verb; + } + fNeedClose = false; + return kClose_Verb; + } + return kDone_Verb; + } + + unsigned verb = *fVerbs++; + const SkPoint* SK_RESTRICT srcPts = fPts; + SkPoint* SK_RESTRICT pts = ptsParam; + + switch (verb) { + case kMove_Verb: + if (fNeedClose) { + fVerbs--; // move back one verb + verb = this->autoClose(pts); + if (verb == kClose_Verb) { + fNeedClose = false; + } + return (Verb)verb; + } + if (fVerbs == fVerbStop) { // might be a trailing moveto + return kDone_Verb; + } + fMoveTo = *srcPts; + pts[0] = *srcPts; + srcPts += 1; + fLastPt = fMoveTo; + fNeedClose = fForceClose; + break; + case kLine_Verb: + pts[0] = fLastPt; + pts[1] = srcPts[0]; + fLastPt = srcPts[0]; + fCloseLine = false; + srcPts += 1; + break; + case kConic_Verb: + fConicWeights += 1; + [[fallthrough]]; + case kQuad_Verb: + pts[0] = fLastPt; + memcpy(&pts[1], srcPts, 2 * sizeof(SkPoint)); + fLastPt = srcPts[1]; + srcPts += 2; + break; + case kCubic_Verb: + pts[0] = fLastPt; + memcpy(&pts[1], srcPts, 3 * sizeof(SkPoint)); + fLastPt = srcPts[2]; + srcPts += 3; + break; + case kClose_Verb: + verb = this->autoClose(pts); + if (verb == kLine_Verb) { + fVerbs--; // move back one verb + } else { + fNeedClose = false; + } + fLastPt = fMoveTo; + break; + } + fPts = srcPts; + return (Verb)verb; +} + +void SkPath::RawIter::setPath(const SkPath& path) { + SkPathPriv::Iterate iterate(path); + fIter = iterate.begin(); + fEnd = iterate.end(); +} + +SkPath::Verb SkPath::RawIter::next(SkPoint pts[4]) { + if (!(fIter != fEnd)) { + return kDone_Verb; + } + auto [verb, iterPts, weights] = *fIter; + int numPts; + switch (verb) { + case SkPathVerb::kMove: numPts = 1; break; + case SkPathVerb::kLine: numPts = 2; break; + case SkPathVerb::kQuad: numPts = 3; break; + case SkPathVerb::kConic: + numPts = 3; + fConicWeight = *weights; + break; + case SkPathVerb::kCubic: numPts = 4; break; + case SkPathVerb::kClose: numPts = 0; break; + } + memcpy(pts, iterPts, sizeof(SkPoint) * numPts); + ++fIter; + return (Verb) verb; +} + +/////////////////////////////////////////////////////////////////////////////// + +static void append_params(SkString* str, const char label[], const SkPoint pts[], + int count, SkScalarAsStringType strType, SkScalar conicWeight = -12345) { + str->append(label); + str->append("("); + + const SkScalar* values = &pts[0].fX; + count *= 2; + + for (int i = 0; i < count; ++i) { + SkAppendScalar(str, values[i], strType); + if (i < count - 1) { + str->append(", "); + } + } + if (conicWeight != -12345) { + str->append(", "); + SkAppendScalar(str, conicWeight, strType); + } + str->append(");"); + if (kHex_SkScalarAsStringType == strType) { + str->append(" // "); + for (int i = 0; i < count; ++i) { + SkAppendScalarDec(str, values[i]); + if (i < count - 1) { + str->append(", "); + } + } + if (conicWeight >= 0) { + str->append(", "); + SkAppendScalarDec(str, conicWeight); + } + } + str->append("\n"); +} + +void SkPath::dump(SkWStream* wStream, bool dumpAsHex) const { + SkScalarAsStringType asType = dumpAsHex ? kHex_SkScalarAsStringType : kDec_SkScalarAsStringType; + Iter iter(*this, false); + SkPoint pts[4]; + Verb verb; + + SkString builder; + char const * const gFillTypeStrs[] = { + "Winding", + "EvenOdd", + "InverseWinding", + "InverseEvenOdd", + }; + builder.printf("path.setFillType(SkPathFillType::k%s);\n", + gFillTypeStrs[(int) this->getFillType()]); + while ((verb = iter.next(pts)) != kDone_Verb) { + switch (verb) { + case kMove_Verb: + append_params(&builder, "path.moveTo", &pts[0], 1, asType); + break; + case kLine_Verb: + append_params(&builder, "path.lineTo", &pts[1], 1, asType); + break; + case kQuad_Verb: + append_params(&builder, "path.quadTo", &pts[1], 2, asType); + break; + case kConic_Verb: + append_params(&builder, "path.conicTo", &pts[1], 2, asType, iter.conicWeight()); + break; + case kCubic_Verb: + append_params(&builder, "path.cubicTo", &pts[1], 3, asType); + break; + case kClose_Verb: + builder.append("path.close();\n"); + break; + default: + SkDebugf(" path: UNKNOWN VERB %d, aborting dump...\n", verb); + verb = kDone_Verb; // stop the loop + break; + } + if (!wStream && builder.size()) { + SkDebugf("%s", builder.c_str()); + builder.reset(); + } + } + if (wStream) { + wStream->writeText(builder.c_str()); + } +} + +void SkPath::dumpArrays(SkWStream* wStream, bool dumpAsHex) const { + SkString builder; + + auto bool_str = [](bool v) { return v ? "true" : "false"; }; + + builder.appendf("// fBoundsIsDirty = %s\n", bool_str(fPathRef->fBoundsIsDirty)); + builder.appendf("// fGenerationID = %d\n", fPathRef->fGenerationID); + builder.appendf("// fSegmentMask = %d\n", fPathRef->fSegmentMask); + builder.appendf("// fIsOval = %s\n", bool_str(fPathRef->fIsOval)); + builder.appendf("// fIsRRect = %s\n", bool_str(fPathRef->fIsRRect)); + + auto append_scalar = [&](SkScalar v) { + if (dumpAsHex) { + builder.appendf("SkBits2Float(0x%08X) /* %g */", SkFloat2Bits(v), v); + } else { + builder.appendf("%g", v); + } + }; + + builder.append("const SkPoint path_points[] = {\n"); + for (int i = 0; i < this->countPoints(); ++i) { + SkPoint p = this->getPoint(i); + builder.append(" { "); + append_scalar(p.fX); + builder.append(", "); + append_scalar(p.fY); + builder.append(" },\n"); + } + builder.append("};\n"); + + const char* gVerbStrs[] = { + "Move", "Line", "Quad", "Conic", "Cubic", "Close" + }; + builder.append("const uint8_t path_verbs[] = {\n "); + for (auto v = fPathRef->verbsBegin(); v != fPathRef->verbsEnd(); ++v) { + builder.appendf("(uint8_t)SkPathVerb::k%s, ", gVerbStrs[*v]); + } + builder.append("\n};\n"); + + const int nConics = fPathRef->conicWeightsEnd() - fPathRef->conicWeights(); + if (nConics) { + builder.append("const SkScalar path_conics[] = {\n "); + for (auto c = fPathRef->conicWeights(); c != fPathRef->conicWeightsEnd(); ++c) { + append_scalar(*c); + builder.append(", "); + } + builder.append("\n};\n"); + } + + char const * const gFillTypeStrs[] = { + "Winding", + "EvenOdd", + "InverseWinding", + "InverseEvenOdd", + }; + + builder.appendf("SkPath path = SkPath::Make(path_points, %d, path_verbs, %d, %s, %d,\n", + this->countPoints(), this->countVerbs(), + nConics ? "path_conics" : "nullptr", nConics); + builder.appendf(" SkPathFillType::k%s, %s);\n", + gFillTypeStrs[(int)this->getFillType()], + bool_str(fIsVolatile)); + + if (wStream) { + wStream->writeText(builder.c_str()); + } else { + SkDebugf("%s\n", builder.c_str()); + } +} + +bool SkPath::isValidImpl() const { + if ((fFillType & ~3) != 0) { + return false; + } + +#ifdef SK_DEBUG_PATH + if (!fBoundsIsDirty) { + SkRect bounds; + + bool isFinite = compute_pt_bounds(&bounds, *fPathRef.get()); + if (SkToBool(fIsFinite) != isFinite) { + return false; + } + + if (fPathRef->countPoints() <= 1) { + // if we're empty, fBounds may be empty but translated, so we can't + // necessarily compare to bounds directly + // try path.addOval(2, 2, 2, 2) which is empty, but the bounds will + // be [2, 2, 2, 2] + if (!bounds.isEmpty() || !fBounds.isEmpty()) { + return false; + } + } else { + if (bounds.isEmpty()) { + if (!fBounds.isEmpty()) { + return false; + } + } else { + if (!fBounds.isEmpty()) { + if (!fBounds.contains(bounds)) { + return false; + } + } + } + } + } +#endif // SK_DEBUG_PATH + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +static int sign(SkScalar x) { return x < 0; } +#define kValueNeverReturnedBySign 2 + +enum DirChange { + kUnknown_DirChange, + kLeft_DirChange, + kRight_DirChange, + kStraight_DirChange, + kBackwards_DirChange, // if double back, allow simple lines to be convex + kInvalid_DirChange +}; + +// only valid for a single contour +struct Convexicator { + + /** The direction returned is only valid if the path is determined convex */ + SkPathFirstDirection getFirstDirection() const { return fFirstDirection; } + + void setMovePt(const SkPoint& pt) { + fFirstPt = fLastPt = pt; + fExpectedDir = kInvalid_DirChange; + } + + bool addPt(const SkPoint& pt) { + if (fLastPt == pt) { + return true; + } + // should only be true for first non-zero vector after setMovePt was called. + if (fFirstPt == fLastPt && fExpectedDir == kInvalid_DirChange) { + fLastVec = pt - fLastPt; + fFirstVec = fLastVec; + } else if (!this->addVec(pt - fLastPt)) { + return false; + } + fLastPt = pt; + return true; + } + + static SkPathConvexity BySign(const SkPoint points[], int count) { + if (count <= 3) { + // point, line, or triangle are always convex + return SkPathConvexity::kConvex; + } + + const SkPoint* last = points + count; + SkPoint currPt = *points++; + SkPoint firstPt = currPt; + int dxes = 0; + int dyes = 0; + int lastSx = kValueNeverReturnedBySign; + int lastSy = kValueNeverReturnedBySign; + for (int outerLoop = 0; outerLoop < 2; ++outerLoop ) { + while (points != last) { + SkVector vec = *points - currPt; + if (!vec.isZero()) { + // give up if vector construction failed + if (!vec.isFinite()) { + return SkPathConvexity::kUnknown; + } + int sx = sign(vec.fX); + int sy = sign(vec.fY); + dxes += (sx != lastSx); + dyes += (sy != lastSy); + if (dxes > 3 || dyes > 3) { + return SkPathConvexity::kConcave; + } + lastSx = sx; + lastSy = sy; + } + currPt = *points++; + if (outerLoop) { + break; + } + } + points = &firstPt; + } + return SkPathConvexity::kConvex; // that is, it may be convex, don't know yet + } + + bool close() { + // If this was an explicit close, there was already a lineTo to fFirstPoint, so this + // addPt() is a no-op. Otherwise, the addPt implicitly closes the contour. In either case, + // we have to check the direction change along the first vector in case it is concave. + return this->addPt(fFirstPt) && this->addVec(fFirstVec); + } + + bool isFinite() const { + return fIsFinite; + } + + int reversals() const { + return fReversals; + } + +private: + DirChange directionChange(const SkVector& curVec) { + SkScalar cross = SkPoint::CrossProduct(fLastVec, curVec); + if (!SkScalarIsFinite(cross)) { + return kUnknown_DirChange; + } + if (cross == 0) { + return fLastVec.dot(curVec) < 0 ? kBackwards_DirChange : kStraight_DirChange; + } + return 1 == SkScalarSignAsInt(cross) ? kRight_DirChange : kLeft_DirChange; + } + + bool addVec(const SkVector& curVec) { + DirChange dir = this->directionChange(curVec); + switch (dir) { + case kLeft_DirChange: // fall through + case kRight_DirChange: + if (kInvalid_DirChange == fExpectedDir) { + fExpectedDir = dir; + fFirstDirection = (kRight_DirChange == dir) ? SkPathFirstDirection::kCW + : SkPathFirstDirection::kCCW; + } else if (dir != fExpectedDir) { + fFirstDirection = SkPathFirstDirection::kUnknown; + return false; + } + fLastVec = curVec; + break; + case kStraight_DirChange: + break; + case kBackwards_DirChange: + // allow path to reverse direction twice + // Given path.moveTo(0, 0); path.lineTo(1, 1); + // - 1st reversal: direction change formed by line (0,0 1,1), line (1,1 0,0) + // - 2nd reversal: direction change formed by line (1,1 0,0), line (0,0 1,1) + fLastVec = curVec; + return ++fReversals < 3; + case kUnknown_DirChange: + return (fIsFinite = false); + case kInvalid_DirChange: + SK_ABORT("Use of invalid direction change flag"); + break; + } + return true; + } + + SkPoint fFirstPt {0, 0}; // The first point of the contour, e.g. moveTo(x,y) + SkVector fFirstVec {0, 0}; // The direction leaving fFirstPt to the next vertex + + SkPoint fLastPt {0, 0}; // The last point passed to addPt() + SkVector fLastVec {0, 0}; // The direction that brought the path to fLastPt + + DirChange fExpectedDir { kInvalid_DirChange }; + SkPathFirstDirection fFirstDirection { SkPathFirstDirection::kUnknown }; + int fReversals { 0 }; + bool fIsFinite { true }; +}; + +SkPathConvexity SkPath::computeConvexity() const { + auto setComputedConvexity = [=](SkPathConvexity convexity){ + SkASSERT(SkPathConvexity::kUnknown != convexity); + this->setConvexity(convexity); + return convexity; + }; + + auto setFail = [=](){ + return setComputedConvexity(SkPathConvexity::kConcave); + }; + + if (!this->isFinite()) { + return setFail(); + } + + // pointCount potentially includes a block of leading moveTos and trailing moveTos. Convexity + // only cares about the last of the initial moveTos and the verbs before the final moveTos. + int pointCount = this->countPoints(); + int skipCount = SkPathPriv::LeadingMoveToCount(*this) - 1; + + if (fLastMoveToIndex >= 0) { + if (fLastMoveToIndex == pointCount - 1) { + // Find the last real verb that affects convexity + auto verbs = fPathRef->verbsEnd() - 1; + while(verbs > fPathRef->verbsBegin() && *verbs == Verb::kMove_Verb) { + verbs--; + pointCount--; + } + } else if (fLastMoveToIndex != skipCount) { + // There's an additional moveTo between two blocks of other verbs, so the path must have + // more than one contour and cannot be convex. + return setComputedConvexity(SkPathConvexity::kConcave); + } // else no trailing or intermediate moveTos to worry about + } + const SkPoint* points = fPathRef->points(); + if (skipCount > 0) { + points += skipCount; + pointCount -= skipCount; + } + + // Check to see if path changes direction more than three times as quick concave test + SkPathConvexity convexity = Convexicator::BySign(points, pointCount); + if (SkPathConvexity::kConvex != convexity) { + return setComputedConvexity(SkPathConvexity::kConcave); + } + + int contourCount = 0; + bool needsClose = false; + Convexicator state; + + for (auto [verb, pts, wt] : SkPathPriv::Iterate(*this)) { + // Looking for the last moveTo before non-move verbs start + if (contourCount == 0) { + if (verb == SkPathVerb::kMove) { + state.setMovePt(pts[0]); + } else { + // Starting the actual contour, fall through to c=1 to add the points + contourCount++; + needsClose = true; + } + } + // Accumulating points into the Convexicator until we hit a close or another move + if (contourCount == 1) { + if (verb == SkPathVerb::kClose || verb == SkPathVerb::kMove) { + if (!state.close()) { + return setFail(); + } + needsClose = false; + contourCount++; + } else { + // lines add 1 point, cubics add 3, conics and quads add 2 + int count = SkPathPriv::PtsInVerb((unsigned) verb); + SkASSERT(count > 0); + for (int i = 1; i <= count; ++i) { + if (!state.addPt(pts[i])) { + return setFail(); + } + } + } + } else { + // The first contour has closed and anything other than spurious trailing moves means + // there's multiple contours and the path can't be convex + if (verb != SkPathVerb::kMove) { + return setFail(); + } + } + } + + // If the path isn't explicitly closed do so implicitly + if (needsClose && !state.close()) { + return setFail(); + } + + if (this->getFirstDirection() == SkPathFirstDirection::kUnknown) { + if (state.getFirstDirection() == SkPathFirstDirection::kUnknown + && !this->getBounds().isEmpty()) { + return setComputedConvexity(state.reversals() < 3 ? + SkPathConvexity::kConvex : SkPathConvexity::kConcave); + } + this->setFirstDirection(state.getFirstDirection()); + } + return setComputedConvexity(SkPathConvexity::kConvex); +} + +/////////////////////////////////////////////////////////////////////////////// + +class ContourIter { +public: + ContourIter(const SkPathRef& pathRef); + + bool done() const { return fDone; } + // if !done() then these may be called + int count() const { return fCurrPtCount; } + const SkPoint* pts() const { return fCurrPt; } + void next(); + +private: + int fCurrPtCount; + const SkPoint* fCurrPt; + const uint8_t* fCurrVerb; + const uint8_t* fStopVerbs; + const SkScalar* fCurrConicWeight; + bool fDone; + SkDEBUGCODE(int fContourCounter;) +}; + +ContourIter::ContourIter(const SkPathRef& pathRef) { + fStopVerbs = pathRef.verbsEnd(); + fDone = false; + fCurrPt = pathRef.points(); + fCurrVerb = pathRef.verbsBegin(); + fCurrConicWeight = pathRef.conicWeights(); + fCurrPtCount = 0; + SkDEBUGCODE(fContourCounter = 0;) + this->next(); +} + +void ContourIter::next() { + if (fCurrVerb >= fStopVerbs) { + fDone = true; + } + if (fDone) { + return; + } + + // skip pts of prev contour + fCurrPt += fCurrPtCount; + + SkASSERT(SkPath::kMove_Verb == fCurrVerb[0]); + int ptCount = 1; // moveTo + const uint8_t* verbs = fCurrVerb; + + for (verbs++; verbs < fStopVerbs; verbs++) { + switch (*verbs) { + case SkPath::kMove_Verb: + goto CONTOUR_END; + case SkPath::kLine_Verb: + ptCount += 1; + break; + case SkPath::kConic_Verb: + fCurrConicWeight += 1; + [[fallthrough]]; + case SkPath::kQuad_Verb: + ptCount += 2; + break; + case SkPath::kCubic_Verb: + ptCount += 3; + break; + case SkPath::kClose_Verb: + break; + default: + SkDEBUGFAIL("unexpected verb"); + break; + } + } +CONTOUR_END: + fCurrPtCount = ptCount; + fCurrVerb = verbs; + SkDEBUGCODE(++fContourCounter;) +} + +// returns cross product of (p1 - p0) and (p2 - p0) +static SkScalar cross_prod(const SkPoint& p0, const SkPoint& p1, const SkPoint& p2) { + SkScalar cross = SkPoint::CrossProduct(p1 - p0, p2 - p0); + // We may get 0 when the above subtracts underflow. We expect this to be + // very rare and lazily promote to double. + if (0 == cross) { + double p0x = SkScalarToDouble(p0.fX); + double p0y = SkScalarToDouble(p0.fY); + + double p1x = SkScalarToDouble(p1.fX); + double p1y = SkScalarToDouble(p1.fY); + + double p2x = SkScalarToDouble(p2.fX); + double p2y = SkScalarToDouble(p2.fY); + + cross = SkDoubleToScalar((p1x - p0x) * (p2y - p0y) - + (p1y - p0y) * (p2x - p0x)); + + } + return cross; +} + +// Returns the first pt with the maximum Y coordinate +static int find_max_y(const SkPoint pts[], int count) { + SkASSERT(count > 0); + SkScalar max = pts[0].fY; + int firstIndex = 0; + for (int i = 1; i < count; ++i) { + SkScalar y = pts[i].fY; + if (y > max) { + max = y; + firstIndex = i; + } + } + return firstIndex; +} + +static int find_diff_pt(const SkPoint pts[], int index, int n, int inc) { + int i = index; + for (;;) { + i = (i + inc) % n; + if (i == index) { // we wrapped around, so abort + break; + } + if (pts[index] != pts[i]) { // found a different point, success! + break; + } + } + return i; +} + +/** + * Starting at index, and moving forward (incrementing), find the xmin and + * xmax of the contiguous points that have the same Y. + */ +static int find_min_max_x_at_y(const SkPoint pts[], int index, int n, + int* maxIndexPtr) { + const SkScalar y = pts[index].fY; + SkScalar min = pts[index].fX; + SkScalar max = min; + int minIndex = index; + int maxIndex = index; + for (int i = index + 1; i < n; ++i) { + if (pts[i].fY != y) { + break; + } + SkScalar x = pts[i].fX; + if (x < min) { + min = x; + minIndex = i; + } else if (x > max) { + max = x; + maxIndex = i; + } + } + *maxIndexPtr = maxIndex; + return minIndex; +} + +static SkPathFirstDirection crossToDir(SkScalar cross) { + return cross > 0 ? SkPathFirstDirection::kCW : SkPathFirstDirection::kCCW; +} + +/* + * We loop through all contours, and keep the computed cross-product of the + * contour that contained the global y-max. If we just look at the first + * contour, we may find one that is wound the opposite way (correctly) since + * it is the interior of a hole (e.g. 'o'). Thus we must find the contour + * that is outer most (or at least has the global y-max) before we can consider + * its cross product. + */ +SkPathFirstDirection SkPathPriv::ComputeFirstDirection(const SkPath& path) { + auto d = path.getFirstDirection(); + if (d != SkPathFirstDirection::kUnknown) { + return d; + } + + // We don't want to pay the cost for computing convexity if it is unknown, + // so we call getConvexityOrUnknown() instead of isConvex(). + if (path.getConvexityOrUnknown() == SkPathConvexity::kConvex) { + SkASSERT(d == SkPathFirstDirection::kUnknown); + return d; + } + + ContourIter iter(*path.fPathRef); + + // initialize with our logical y-min + SkScalar ymax = path.getBounds().fTop; + SkScalar ymaxCross = 0; + + for (; !iter.done(); iter.next()) { + int n = iter.count(); + if (n < 3) { + continue; + } + + const SkPoint* pts = iter.pts(); + SkScalar cross = 0; + int index = find_max_y(pts, n); + if (pts[index].fY < ymax) { + continue; + } + + // If there is more than 1 distinct point at the y-max, we take the + // x-min and x-max of them and just subtract to compute the dir. + if (pts[(index + 1) % n].fY == pts[index].fY) { + int maxIndex; + int minIndex = find_min_max_x_at_y(pts, index, n, &maxIndex); + if (minIndex == maxIndex) { + goto TRY_CROSSPROD; + } + SkASSERT(pts[minIndex].fY == pts[index].fY); + SkASSERT(pts[maxIndex].fY == pts[index].fY); + SkASSERT(pts[minIndex].fX <= pts[maxIndex].fX); + // we just subtract the indices, and let that auto-convert to + // SkScalar, since we just want - or + to signal the direction. + cross = minIndex - maxIndex; + } else { + TRY_CROSSPROD: + // Find a next and prev index to use for the cross-product test, + // but we try to find pts that form non-zero vectors from pts[index] + // + // Its possible that we can't find two non-degenerate vectors, so + // we have to guard our search (e.g. all the pts could be in the + // same place). + + // we pass n - 1 instead of -1 so we don't foul up % operator by + // passing it a negative LH argument. + int prev = find_diff_pt(pts, index, n, n - 1); + if (prev == index) { + // completely degenerate, skip to next contour + continue; + } + int next = find_diff_pt(pts, index, n, 1); + SkASSERT(next != index); + cross = cross_prod(pts[prev], pts[index], pts[next]); + // if we get a zero and the points are horizontal, then we look at the spread in + // x-direction. We really should continue to walk away from the degeneracy until + // there is a divergence. + if (0 == cross && pts[prev].fY == pts[index].fY && pts[next].fY == pts[index].fY) { + // construct the subtract so we get the correct Direction below + cross = pts[index].fX - pts[next].fX; + } + } + + if (cross) { + // record our best guess so far + ymax = pts[index].fY; + ymaxCross = cross; + } + } + if (ymaxCross) { + d = crossToDir(ymaxCross); + path.setFirstDirection(d); + } + return d; // may still be kUnknown +} + +/////////////////////////////////////////////////////////////////////////////// + +static bool between(SkScalar a, SkScalar b, SkScalar c) { + SkASSERT(((a <= b && b <= c) || (a >= b && b >= c)) == ((a - b) * (c - b) <= 0) + || (SkScalarNearlyZero(a) && SkScalarNearlyZero(b) && SkScalarNearlyZero(c))); + return (a - b) * (c - b) <= 0; +} + +static SkScalar eval_cubic_pts(SkScalar c0, SkScalar c1, SkScalar c2, SkScalar c3, + SkScalar t) { + SkScalar A = c3 + 3*(c1 - c2) - c0; + SkScalar B = 3*(c2 - c1 - c1 + c0); + SkScalar C = 3*(c1 - c0); + SkScalar D = c0; + return poly_eval(A, B, C, D, t); +} + +template static void find_minmax(const SkPoint pts[], + SkScalar* minPtr, SkScalar* maxPtr) { + SkScalar min, max; + min = max = pts[0].fX; + for (size_t i = 1; i < N; ++i) { + min = std::min(min, pts[i].fX); + max = std::max(max, pts[i].fX); + } + *minPtr = min; + *maxPtr = max; +} + +static bool checkOnCurve(SkScalar x, SkScalar y, const SkPoint& start, const SkPoint& end) { + if (start.fY == end.fY) { + return between(start.fX, x, end.fX) && x != end.fX; + } else { + return x == start.fX && y == start.fY; + } +} + +static int winding_mono_cubic(const SkPoint pts[], SkScalar x, SkScalar y, int* onCurveCount) { + SkScalar y0 = pts[0].fY; + SkScalar y3 = pts[3].fY; + + int dir = 1; + if (y0 > y3) { + using std::swap; + swap(y0, y3); + dir = -1; + } + if (y < y0 || y > y3) { + return 0; + } + if (checkOnCurve(x, y, pts[0], pts[3])) { + *onCurveCount += 1; + return 0; + } + if (y == y3) { + return 0; + } + + // quickreject or quickaccept + SkScalar min, max; + find_minmax<4>(pts, &min, &max); + if (x < min) { + return 0; + } + if (x > max) { + return dir; + } + + // compute the actual x(t) value + SkScalar t; + if (!SkCubicClipper::ChopMonoAtY(pts, y, &t)) { + return 0; + } + SkScalar xt = eval_cubic_pts(pts[0].fX, pts[1].fX, pts[2].fX, pts[3].fX, t); + if (SkScalarNearlyEqual(xt, x)) { + if (x != pts[3].fX || y != pts[3].fY) { // don't test end points; they're start points + *onCurveCount += 1; + return 0; + } + } + return xt < x ? dir : 0; +} + +static int winding_cubic(const SkPoint pts[], SkScalar x, SkScalar y, int* onCurveCount) { + SkPoint dst[10]; + int n = SkChopCubicAtYExtrema(pts, dst); + int w = 0; + for (int i = 0; i <= n; ++i) { + w += winding_mono_cubic(&dst[i * 3], x, y, onCurveCount); + } + return w; +} + +static double conic_eval_numerator(const SkScalar src[], SkScalar w, SkScalar t) { + SkASSERT(src); + SkASSERT(t >= 0 && t <= 1); + SkScalar src2w = src[2] * w; + SkScalar C = src[0]; + SkScalar A = src[4] - 2 * src2w + C; + SkScalar B = 2 * (src2w - C); + return poly_eval(A, B, C, t); +} + + +static double conic_eval_denominator(SkScalar w, SkScalar t) { + SkScalar B = 2 * (w - 1); + SkScalar C = 1; + SkScalar A = -B; + return poly_eval(A, B, C, t); +} + +static int winding_mono_conic(const SkConic& conic, SkScalar x, SkScalar y, int* onCurveCount) { + const SkPoint* pts = conic.fPts; + SkScalar y0 = pts[0].fY; + SkScalar y2 = pts[2].fY; + + int dir = 1; + if (y0 > y2) { + using std::swap; + swap(y0, y2); + dir = -1; + } + if (y < y0 || y > y2) { + return 0; + } + if (checkOnCurve(x, y, pts[0], pts[2])) { + *onCurveCount += 1; + return 0; + } + if (y == y2) { + return 0; + } + + SkScalar roots[2]; + SkScalar A = pts[2].fY; + SkScalar B = pts[1].fY * conic.fW - y * conic.fW + y; + SkScalar C = pts[0].fY; + A += C - 2 * B; // A = a + c - 2*(b*w - yCept*w + yCept) + B -= C; // B = b*w - w * yCept + yCept - a + C -= y; + int n = SkFindUnitQuadRoots(A, 2 * B, C, roots); + SkASSERT(n <= 1); + SkScalar xt; + if (0 == n) { + // zero roots are returned only when y0 == y + // Need [0] if dir == 1 + // and [2] if dir == -1 + xt = pts[1 - dir].fX; + } else { + SkScalar t = roots[0]; + xt = conic_eval_numerator(&pts[0].fX, conic.fW, t) / conic_eval_denominator(conic.fW, t); + } + if (SkScalarNearlyEqual(xt, x)) { + if (x != pts[2].fX || y != pts[2].fY) { // don't test end points; they're start points + *onCurveCount += 1; + return 0; + } + } + return xt < x ? dir : 0; +} + +static bool is_mono_quad(SkScalar y0, SkScalar y1, SkScalar y2) { + // return SkScalarSignAsInt(y0 - y1) + SkScalarSignAsInt(y1 - y2) != 0; + if (y0 == y1) { + return true; + } + if (y0 < y1) { + return y1 <= y2; + } else { + return y1 >= y2; + } +} + +static int winding_conic(const SkPoint pts[], SkScalar x, SkScalar y, SkScalar weight, + int* onCurveCount) { + SkConic conic(pts, weight); + SkConic chopped[2]; + // If the data points are very large, the conic may not be monotonic but may also + // fail to chop. Then, the chopper does not split the original conic in two. + bool isMono = is_mono_quad(pts[0].fY, pts[1].fY, pts[2].fY) || !conic.chopAtYExtrema(chopped); + int w = winding_mono_conic(isMono ? conic : chopped[0], x, y, onCurveCount); + if (!isMono) { + w += winding_mono_conic(chopped[1], x, y, onCurveCount); + } + return w; +} + +static int winding_mono_quad(const SkPoint pts[], SkScalar x, SkScalar y, int* onCurveCount) { + SkScalar y0 = pts[0].fY; + SkScalar y2 = pts[2].fY; + + int dir = 1; + if (y0 > y2) { + using std::swap; + swap(y0, y2); + dir = -1; + } + if (y < y0 || y > y2) { + return 0; + } + if (checkOnCurve(x, y, pts[0], pts[2])) { + *onCurveCount += 1; + return 0; + } + if (y == y2) { + return 0; + } + // bounds check on X (not required. is it faster?) +#if 0 + if (pts[0].fX > x && pts[1].fX > x && pts[2].fX > x) { + return 0; + } +#endif + + SkScalar roots[2]; + int n = SkFindUnitQuadRoots(pts[0].fY - 2 * pts[1].fY + pts[2].fY, + 2 * (pts[1].fY - pts[0].fY), + pts[0].fY - y, + roots); + SkASSERT(n <= 1); + SkScalar xt; + if (0 == n) { + // zero roots are returned only when y0 == y + // Need [0] if dir == 1 + // and [2] if dir == -1 + xt = pts[1 - dir].fX; + } else { + SkScalar t = roots[0]; + SkScalar C = pts[0].fX; + SkScalar A = pts[2].fX - 2 * pts[1].fX + C; + SkScalar B = 2 * (pts[1].fX - C); + xt = poly_eval(A, B, C, t); + } + if (SkScalarNearlyEqual(xt, x)) { + if (x != pts[2].fX || y != pts[2].fY) { // don't test end points; they're start points + *onCurveCount += 1; + return 0; + } + } + return xt < x ? dir : 0; +} + +static int winding_quad(const SkPoint pts[], SkScalar x, SkScalar y, int* onCurveCount) { + SkPoint dst[5]; + int n = 0; + + if (!is_mono_quad(pts[0].fY, pts[1].fY, pts[2].fY)) { + n = SkChopQuadAtYExtrema(pts, dst); + pts = dst; + } + int w = winding_mono_quad(pts, x, y, onCurveCount); + if (n > 0) { + w += winding_mono_quad(&pts[2], x, y, onCurveCount); + } + return w; +} + +static int winding_line(const SkPoint pts[], SkScalar x, SkScalar y, int* onCurveCount) { + SkScalar x0 = pts[0].fX; + SkScalar y0 = pts[0].fY; + SkScalar x1 = pts[1].fX; + SkScalar y1 = pts[1].fY; + + SkScalar dy = y1 - y0; + + int dir = 1; + if (y0 > y1) { + using std::swap; + swap(y0, y1); + dir = -1; + } + if (y < y0 || y > y1) { + return 0; + } + if (checkOnCurve(x, y, pts[0], pts[1])) { + *onCurveCount += 1; + return 0; + } + if (y == y1) { + return 0; + } + SkScalar cross = (x1 - x0) * (y - pts[0].fY) - dy * (x - x0); + + if (!cross) { + // zero cross means the point is on the line, and since the case where + // y of the query point is at the end point is handled above, we can be + // sure that we're on the line (excluding the end point) here + if (x != x1 || y != pts[1].fY) { + *onCurveCount += 1; + } + dir = 0; + } else if (SkScalarSignAsInt(cross) == dir) { + dir = 0; + } + return dir; +} + +static void tangent_cubic(const SkPoint pts[], SkScalar x, SkScalar y, + SkTDArray* tangents) { + if (!between(pts[0].fY, y, pts[1].fY) && !between(pts[1].fY, y, pts[2].fY) + && !between(pts[2].fY, y, pts[3].fY)) { + return; + } + if (!between(pts[0].fX, x, pts[1].fX) && !between(pts[1].fX, x, pts[2].fX) + && !between(pts[2].fX, x, pts[3].fX)) { + return; + } + SkPoint dst[10]; + int n = SkChopCubicAtYExtrema(pts, dst); + for (int i = 0; i <= n; ++i) { + SkPoint* c = &dst[i * 3]; + SkScalar t; + if (!SkCubicClipper::ChopMonoAtY(c, y, &t)) { + continue; + } + SkScalar xt = eval_cubic_pts(c[0].fX, c[1].fX, c[2].fX, c[3].fX, t); + if (!SkScalarNearlyEqual(x, xt)) { + continue; + } + SkVector tangent; + SkEvalCubicAt(c, t, nullptr, &tangent, nullptr); + tangents->push_back(tangent); + } +} + +static void tangent_conic(const SkPoint pts[], SkScalar x, SkScalar y, SkScalar w, + SkTDArray* tangents) { + if (!between(pts[0].fY, y, pts[1].fY) && !between(pts[1].fY, y, pts[2].fY)) { + return; + } + if (!between(pts[0].fX, x, pts[1].fX) && !between(pts[1].fX, x, pts[2].fX)) { + return; + } + SkScalar roots[2]; + SkScalar A = pts[2].fY; + SkScalar B = pts[1].fY * w - y * w + y; + SkScalar C = pts[0].fY; + A += C - 2 * B; // A = a + c - 2*(b*w - yCept*w + yCept) + B -= C; // B = b*w - w * yCept + yCept - a + C -= y; + int n = SkFindUnitQuadRoots(A, 2 * B, C, roots); + for (int index = 0; index < n; ++index) { + SkScalar t = roots[index]; + SkScalar xt = conic_eval_numerator(&pts[0].fX, w, t) / conic_eval_denominator(w, t); + if (!SkScalarNearlyEqual(x, xt)) { + continue; + } + SkConic conic(pts, w); + tangents->push_back(conic.evalTangentAt(t)); + } +} + +static void tangent_quad(const SkPoint pts[], SkScalar x, SkScalar y, + SkTDArray* tangents) { + if (!between(pts[0].fY, y, pts[1].fY) && !between(pts[1].fY, y, pts[2].fY)) { + return; + } + if (!between(pts[0].fX, x, pts[1].fX) && !between(pts[1].fX, x, pts[2].fX)) { + return; + } + SkScalar roots[2]; + int n = SkFindUnitQuadRoots(pts[0].fY - 2 * pts[1].fY + pts[2].fY, + 2 * (pts[1].fY - pts[0].fY), + pts[0].fY - y, + roots); + for (int index = 0; index < n; ++index) { + SkScalar t = roots[index]; + SkScalar C = pts[0].fX; + SkScalar A = pts[2].fX - 2 * pts[1].fX + C; + SkScalar B = 2 * (pts[1].fX - C); + SkScalar xt = poly_eval(A, B, C, t); + if (!SkScalarNearlyEqual(x, xt)) { + continue; + } + tangents->push_back(SkEvalQuadTangentAt(pts, t)); + } +} + +static void tangent_line(const SkPoint pts[], SkScalar x, SkScalar y, + SkTDArray* tangents) { + SkScalar y0 = pts[0].fY; + SkScalar y1 = pts[1].fY; + if (!between(y0, y, y1)) { + return; + } + SkScalar x0 = pts[0].fX; + SkScalar x1 = pts[1].fX; + if (!between(x0, x, x1)) { + return; + } + SkScalar dx = x1 - x0; + SkScalar dy = y1 - y0; + if (!SkScalarNearlyEqual((x - x0) * dy, dx * (y - y0))) { + return; + } + SkVector v; + v.set(dx, dy); + tangents->push_back(v); +} + +static bool contains_inclusive(const SkRect& r, SkScalar x, SkScalar y) { + return r.fLeft <= x && x <= r.fRight && r.fTop <= y && y <= r.fBottom; +} + +bool SkPath::contains(SkScalar x, SkScalar y) const { + bool isInverse = this->isInverseFillType(); + if (this->isEmpty()) { + return isInverse; + } + + if (!contains_inclusive(this->getBounds(), x, y)) { + return isInverse; + } + + SkPath::Iter iter(*this, true); + bool done = false; + int w = 0; + int onCurveCount = 0; + do { + SkPoint pts[4]; + switch (iter.next(pts)) { + case SkPath::kMove_Verb: + case SkPath::kClose_Verb: + break; + case SkPath::kLine_Verb: + w += winding_line(pts, x, y, &onCurveCount); + break; + case SkPath::kQuad_Verb: + w += winding_quad(pts, x, y, &onCurveCount); + break; + case SkPath::kConic_Verb: + w += winding_conic(pts, x, y, iter.conicWeight(), &onCurveCount); + break; + case SkPath::kCubic_Verb: + w += winding_cubic(pts, x, y, &onCurveCount); + break; + case SkPath::kDone_Verb: + done = true; + break; + } + } while (!done); + bool evenOddFill = SkPathFillType::kEvenOdd == this->getFillType() + || SkPathFillType::kInverseEvenOdd == this->getFillType(); + if (evenOddFill) { + w &= 1; + } + if (w) { + return !isInverse; + } + if (onCurveCount <= 1) { + return SkToBool(onCurveCount) ^ isInverse; + } + if ((onCurveCount & 1) || evenOddFill) { + return SkToBool(onCurveCount & 1) ^ isInverse; + } + // If the point touches an even number of curves, and the fill is winding, check for + // coincidence. Count coincidence as places where the on curve points have identical tangents. + iter.setPath(*this, true); + done = false; + SkTDArray tangents; + do { + SkPoint pts[4]; + int oldCount = tangents.size(); + switch (iter.next(pts)) { + case SkPath::kMove_Verb: + case SkPath::kClose_Verb: + break; + case SkPath::kLine_Verb: + tangent_line(pts, x, y, &tangents); + break; + case SkPath::kQuad_Verb: + tangent_quad(pts, x, y, &tangents); + break; + case SkPath::kConic_Verb: + tangent_conic(pts, x, y, iter.conicWeight(), &tangents); + break; + case SkPath::kCubic_Verb: + tangent_cubic(pts, x, y, &tangents); + break; + case SkPath::kDone_Verb: + done = true; + break; + } + if (tangents.size() > oldCount) { + int last = tangents.size() - 1; + const SkVector& tangent = tangents[last]; + if (SkScalarNearlyZero(SkPointPriv::LengthSqd(tangent))) { + tangents.remove(last); + } else { + for (int index = 0; index < last; ++index) { + const SkVector& test = tangents[index]; + if (SkScalarNearlyZero(test.cross(tangent)) + && SkScalarSignAsInt(tangent.fX * test.fX) <= 0 + && SkScalarSignAsInt(tangent.fY * test.fY) <= 0) { + tangents.remove(last); + tangents.removeShuffle(index); + break; + } + } + } + } + } while (!done); + return SkToBool(tangents.size()) ^ isInverse; +} + +// Sort of like makeSpace(0) but the the additional requirement that we actively shrink the +// allocations to just fit the current needs. makeSpace() will only grow, but never shrinks. +// +void SkPath::shrinkToFit() { + // Since this can relocate the allocated arrays, we have to defensively copy ourselves if + // we're not the only owner of the pathref... since relocating the arrays will invalidate + // any existing iterators. + if (!fPathRef->unique()) { + SkPathRef* pr = new SkPathRef; + pr->copy(*fPathRef, 0, 0); + fPathRef.reset(pr); + } + fPathRef->fPoints.shrink_to_fit(); + fPathRef->fVerbs.shrink_to_fit(); + fPathRef->fConicWeights.shrink_to_fit(); + SkDEBUGCODE(fPathRef->validate();) +} + + +int SkPath::ConvertConicToQuads(const SkPoint& p0, const SkPoint& p1, const SkPoint& p2, + SkScalar w, SkPoint pts[], int pow2) { + const SkConic conic(p0, p1, p2, w); + return conic.chopIntoQuadsPOW2(pts, pow2); +} + +bool SkPathPriv::IsSimpleRect(const SkPath& path, bool isSimpleFill, SkRect* rect, + SkPathDirection* direction, unsigned* start) { + if (path.getSegmentMasks() != SkPath::kLine_SegmentMask) { + return false; + } + SkPoint rectPts[5]; + int rectPtCnt = 0; + bool needsClose = !isSimpleFill; + for (auto [v, verbPts, w] : SkPathPriv::Iterate(path)) { + switch (v) { + case SkPathVerb::kMove: + if (0 != rectPtCnt) { + return false; + } + rectPts[0] = verbPts[0]; + ++rectPtCnt; + break; + case SkPathVerb::kLine: + if (5 == rectPtCnt) { + return false; + } + rectPts[rectPtCnt] = verbPts[1]; + ++rectPtCnt; + break; + case SkPathVerb::kClose: + if (4 == rectPtCnt) { + rectPts[4] = rectPts[0]; + rectPtCnt = 5; + } + needsClose = false; + break; + case SkPathVerb::kQuad: + case SkPathVerb::kConic: + case SkPathVerb::kCubic: + return false; + } + } + if (needsClose) { + return false; + } + if (rectPtCnt < 5) { + return false; + } + if (rectPts[0] != rectPts[4]) { + return false; + } + // Check for two cases of rectangles: pts 0 and 3 form a vertical edge or a horizontal edge ( + // and pts 1 and 2 the opposite vertical or horizontal edge). + bool vec03IsVertical; + if (rectPts[0].fX == rectPts[3].fX && rectPts[1].fX == rectPts[2].fX && + rectPts[0].fY == rectPts[1].fY && rectPts[3].fY == rectPts[2].fY) { + // Make sure it has non-zero width and height + if (rectPts[0].fX == rectPts[1].fX || rectPts[0].fY == rectPts[3].fY) { + return false; + } + vec03IsVertical = true; + } else if (rectPts[0].fY == rectPts[3].fY && rectPts[1].fY == rectPts[2].fY && + rectPts[0].fX == rectPts[1].fX && rectPts[3].fX == rectPts[2].fX) { + // Make sure it has non-zero width and height + if (rectPts[0].fY == rectPts[1].fY || rectPts[0].fX == rectPts[3].fX) { + return false; + } + vec03IsVertical = false; + } else { + return false; + } + // Set sortFlags so that it has the low bit set if pt index 0 is on right edge and second bit + // set if it is on the bottom edge. + unsigned sortFlags = + ((rectPts[0].fX < rectPts[2].fX) ? 0b00 : 0b01) | + ((rectPts[0].fY < rectPts[2].fY) ? 0b00 : 0b10); + switch (sortFlags) { + case 0b00: + rect->setLTRB(rectPts[0].fX, rectPts[0].fY, rectPts[2].fX, rectPts[2].fY); + *direction = vec03IsVertical ? SkPathDirection::kCW : SkPathDirection::kCCW; + *start = 0; + break; + case 0b01: + rect->setLTRB(rectPts[2].fX, rectPts[0].fY, rectPts[0].fX, rectPts[2].fY); + *direction = vec03IsVertical ? SkPathDirection::kCCW : SkPathDirection::kCW; + *start = 1; + break; + case 0b10: + rect->setLTRB(rectPts[0].fX, rectPts[2].fY, rectPts[2].fX, rectPts[0].fY); + *direction = vec03IsVertical ? SkPathDirection::kCCW : SkPathDirection::kCW; + *start = 3; + break; + case 0b11: + rect->setLTRB(rectPts[2].fX, rectPts[2].fY, rectPts[0].fX, rectPts[0].fY); + *direction = vec03IsVertical ? SkPathDirection::kCW : SkPathDirection::kCCW; + *start = 2; + break; + } + return true; +} + +bool SkPathPriv::DrawArcIsConvex(SkScalar sweepAngle, bool useCenter, bool isFillNoPathEffect) { + if (isFillNoPathEffect && SkScalarAbs(sweepAngle) >= 360.f) { + // This gets converted to an oval. + return true; + } + if (useCenter) { + // This is a pie wedge. It's convex if the angle is <= 180. + return SkScalarAbs(sweepAngle) <= 180.f; + } + // When the angle exceeds 360 this wraps back on top of itself. Otherwise it is a circle clipped + // to a secant, i.e. convex. + return SkScalarAbs(sweepAngle) <= 360.f; +} + +void SkPathPriv::CreateDrawArcPath(SkPath* path, const SkRect& oval, SkScalar startAngle, + SkScalar sweepAngle, bool useCenter, bool isFillNoPathEffect) { + SkASSERT(!oval.isEmpty()); + SkASSERT(sweepAngle); +#if defined(SK_BUILD_FOR_FUZZER) + if (sweepAngle > 3600.0f || sweepAngle < -3600.0f) { + return; + } +#endif + path->reset(); + path->setIsVolatile(true); + path->setFillType(SkPathFillType::kWinding); + if (isFillNoPathEffect && SkScalarAbs(sweepAngle) >= 360.f) { + path->addOval(oval); + SkASSERT(path->isConvex() && DrawArcIsConvex(sweepAngle, false, isFillNoPathEffect)); + return; + } + if (useCenter) { + path->moveTo(oval.centerX(), oval.centerY()); + } + auto firstDir = + sweepAngle > 0 ? SkPathFirstDirection::kCW : SkPathFirstDirection::kCCW; + bool convex = DrawArcIsConvex(sweepAngle, useCenter, isFillNoPathEffect); + // Arc to mods at 360 and drawArc is not supposed to. + bool forceMoveTo = !useCenter; + while (sweepAngle <= -360.f) { + path->arcTo(oval, startAngle, -180.f, forceMoveTo); + startAngle -= 180.f; + path->arcTo(oval, startAngle, -180.f, false); + startAngle -= 180.f; + forceMoveTo = false; + sweepAngle += 360.f; + } + while (sweepAngle >= 360.f) { + path->arcTo(oval, startAngle, 180.f, forceMoveTo); + startAngle += 180.f; + path->arcTo(oval, startAngle, 180.f, false); + startAngle += 180.f; + forceMoveTo = false; + sweepAngle -= 360.f; + } + path->arcTo(oval, startAngle, sweepAngle, forceMoveTo); + if (useCenter) { + path->close(); + } + path->setConvexity(convex ? SkPathConvexity::kConvex : SkPathConvexity::kConcave); + path->setFirstDirection(firstDir); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static int compute_quad_extremas(const SkPoint src[3], SkPoint extremas[3]) { + SkScalar ts[2]; + int n = SkFindQuadExtrema(src[0].fX, src[1].fX, src[2].fX, ts); + n += SkFindQuadExtrema(src[0].fY, src[1].fY, src[2].fY, &ts[n]); + SkASSERT(n >= 0 && n <= 2); + for (int i = 0; i < n; ++i) { + extremas[i] = SkEvalQuadAt(src, ts[i]); + } + extremas[n] = src[2]; + return n + 1; +} + +static int compute_conic_extremas(const SkPoint src[3], SkScalar w, SkPoint extremas[3]) { + SkConic conic(src[0], src[1], src[2], w); + SkScalar ts[2]; + int n = conic.findXExtrema(ts); + n += conic.findYExtrema(&ts[n]); + SkASSERT(n >= 0 && n <= 2); + for (int i = 0; i < n; ++i) { + extremas[i] = conic.evalAt(ts[i]); + } + extremas[n] = src[2]; + return n + 1; +} + +static int compute_cubic_extremas(const SkPoint src[4], SkPoint extremas[5]) { + SkScalar ts[4]; + int n = SkFindCubicExtrema(src[0].fX, src[1].fX, src[2].fX, src[3].fX, ts); + n += SkFindCubicExtrema(src[0].fY, src[1].fY, src[2].fY, src[3].fY, &ts[n]); + SkASSERT(n >= 0 && n <= 4); + for (int i = 0; i < n; ++i) { + SkEvalCubicAt(src, ts[i], &extremas[i], nullptr, nullptr); + } + extremas[n] = src[3]; + return n + 1; +} + +SkRect SkPath::computeTightBounds() const { + if (0 == this->countVerbs()) { + return SkRect::MakeEmpty(); + } + + if (this->getSegmentMasks() == SkPath::kLine_SegmentMask) { + return this->getBounds(); + } + + SkPoint extremas[5]; // big enough to hold worst-case curve type (cubic) extremas + 1 + + // initial with the first MoveTo, so we don't have to check inside the switch + skvx::float2 min, max; + min = max = from_point(this->getPoint(0)); + for (auto [verb, pts, w] : SkPathPriv::Iterate(*this)) { + int count = 0; + switch (verb) { + case SkPathVerb::kMove: + extremas[0] = pts[0]; + count = 1; + break; + case SkPathVerb::kLine: + extremas[0] = pts[1]; + count = 1; + break; + case SkPathVerb::kQuad: + count = compute_quad_extremas(pts, extremas); + break; + case SkPathVerb::kConic: + count = compute_conic_extremas(pts, *w, extremas); + break; + case SkPathVerb::kCubic: + count = compute_cubic_extremas(pts, extremas); + break; + case SkPathVerb::kClose: + break; + } + for (int i = 0; i < count; ++i) { + skvx::float2 tmp = from_point(extremas[i]); + min = skvx::min(min, tmp); + max = skvx::max(max, tmp); + } + } + SkRect bounds; + min.store((SkPoint*)&bounds.fLeft); + max.store((SkPoint*)&bounds.fRight); + return bounds; +} + +bool SkPath::IsLineDegenerate(const SkPoint& p1, const SkPoint& p2, bool exact) { + return exact ? p1 == p2 : SkPointPriv::EqualsWithinTolerance(p1, p2); +} + +bool SkPath::IsQuadDegenerate(const SkPoint& p1, const SkPoint& p2, + const SkPoint& p3, bool exact) { + return exact ? p1 == p2 && p2 == p3 : SkPointPriv::EqualsWithinTolerance(p1, p2) && + SkPointPriv::EqualsWithinTolerance(p2, p3); +} + +bool SkPath::IsCubicDegenerate(const SkPoint& p1, const SkPoint& p2, + const SkPoint& p3, const SkPoint& p4, bool exact) { + return exact ? p1 == p2 && p2 == p3 && p3 == p4 : + SkPointPriv::EqualsWithinTolerance(p1, p2) && + SkPointPriv::EqualsWithinTolerance(p2, p3) && + SkPointPriv::EqualsWithinTolerance(p3, p4); +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +SkPathVerbAnalysis sk_path_analyze_verbs(const uint8_t vbs[], int verbCount) { + SkPathVerbAnalysis info = {false, 0, 0, 0}; + + bool needMove = true; + bool invalid = false; + + if (verbCount >= (INT_MAX / 3)) { + invalid = true; + } else { + for (int i = 0; i < verbCount; ++i) { + switch ((SkPathVerb)vbs[i]) { + case SkPathVerb::kMove: + needMove = false; + info.points += 1; + break; + case SkPathVerb::kLine: + invalid |= needMove; + info.segmentMask |= kLine_SkPathSegmentMask; + info.points += 1; + break; + case SkPathVerb::kQuad: + invalid |= needMove; + info.segmentMask |= kQuad_SkPathSegmentMask; + info.points += 2; + break; + case SkPathVerb::kConic: + invalid |= needMove; + info.segmentMask |= kConic_SkPathSegmentMask; + info.points += 2; + info.weights += 1; + break; + case SkPathVerb::kCubic: + invalid |= needMove; + info.segmentMask |= kCubic_SkPathSegmentMask; + info.points += 3; + break; + case SkPathVerb::kClose: + invalid |= needMove; + needMove = true; + break; + default: + invalid = true; + break; + } + } + } + info.valid = !invalid; + return info; +} + +SkPath SkPath::Make(const SkPoint pts[], int pointCount, + const uint8_t vbs[], int verbCount, + const SkScalar ws[], int wCount, + SkPathFillType ft, bool isVolatile) { + if (verbCount <= 0) { + return SkPath(); + } + + const auto info = sk_path_analyze_verbs(vbs, verbCount); + if (!info.valid || info.points > pointCount || info.weights > wCount) { + SkDEBUGFAIL("invalid verbs and number of points/weights"); + return SkPath(); + } + + return SkPath(sk_sp(new SkPathRef( + SkPathRef::PointsArray(pts, info.points), + SkPathRef::VerbsArray(vbs, verbCount), + SkPathRef::ConicWeightsArray(ws, info.weights), + info.segmentMask)), + ft, isVolatile, SkPathConvexity::kUnknown, SkPathFirstDirection::kUnknown); +} + +SkPath SkPath::Rect(const SkRect& r, SkPathDirection dir, unsigned startIndex) { + return SkPathBuilder().addRect(r, dir, startIndex).detach(); +} + +SkPath SkPath::Oval(const SkRect& r, SkPathDirection dir) { + return SkPathBuilder().addOval(r, dir).detach(); +} + +SkPath SkPath::Oval(const SkRect& r, SkPathDirection dir, unsigned startIndex) { + return SkPathBuilder().addOval(r, dir, startIndex).detach(); +} + +SkPath SkPath::Circle(SkScalar x, SkScalar y, SkScalar r, SkPathDirection dir) { + return SkPathBuilder().addCircle(x, y, r, dir).detach(); +} + +SkPath SkPath::RRect(const SkRRect& rr, SkPathDirection dir) { + return SkPathBuilder().addRRect(rr, dir).detach(); +} + +SkPath SkPath::RRect(const SkRRect& rr, SkPathDirection dir, unsigned startIndex) { + return SkPathBuilder().addRRect(rr, dir, startIndex).detach(); +} + +SkPath SkPath::RRect(const SkRect& r, SkScalar rx, SkScalar ry, SkPathDirection dir) { + return SkPathBuilder().addRRect(SkRRect::MakeRectXY(r, rx, ry), dir).detach(); +} + +SkPath SkPath::Polygon(const SkPoint pts[], int count, bool isClosed, + SkPathFillType ft, bool isVolatile) { + return SkPathBuilder().addPolygon(pts, count, isClosed) + .setFillType(ft) + .setIsVolatile(isVolatile) + .detach(); +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkPathPriv::IsRectContour(const SkPath& path, bool allowPartial, int* currVerb, + const SkPoint** ptsPtr, bool* isClosed, SkPathDirection* direction, + SkRect* rect) { + int corners = 0; + SkPoint closeXY; // used to determine if final line falls on a diagonal + SkPoint lineStart; // used to construct line from previous point + const SkPoint* firstPt = nullptr; // first point in the rect (last of first moves) + const SkPoint* lastPt = nullptr; // last point in the rect (last of lines or first if closed) + SkPoint firstCorner; + SkPoint thirdCorner; + const SkPoint* pts = *ptsPtr; + const SkPoint* savePts = nullptr; // used to allow caller to iterate through a pair of rects + lineStart.set(0, 0); + signed char directions[] = {-1, -1, -1, -1, -1}; // -1 to 3; -1 is uninitialized + bool closedOrMoved = false; + bool autoClose = false; + bool insertClose = false; + int verbCnt = path.fPathRef->countVerbs(); + while (*currVerb < verbCnt && (!allowPartial || !autoClose)) { + uint8_t verb = insertClose ? (uint8_t) SkPath::kClose_Verb : path.fPathRef->atVerb(*currVerb); + switch (verb) { + case SkPath::kClose_Verb: + savePts = pts; + autoClose = true; + insertClose = false; + [[fallthrough]]; + case SkPath::kLine_Verb: { + if (SkPath::kClose_Verb != verb) { + lastPt = pts; + } + SkPoint lineEnd = SkPath::kClose_Verb == verb ? *firstPt : *pts++; + SkVector lineDelta = lineEnd - lineStart; + if (lineDelta.fX && lineDelta.fY) { + return false; // diagonal + } + if (!lineDelta.isFinite()) { + return false; // path contains infinity or NaN + } + if (lineStart == lineEnd) { + break; // single point on side OK + } + int nextDirection = rect_make_dir(lineDelta.fX, lineDelta.fY); // 0 to 3 + if (0 == corners) { + directions[0] = nextDirection; + corners = 1; + closedOrMoved = false; + lineStart = lineEnd; + break; + } + if (closedOrMoved) { + return false; // closed followed by a line + } + if (autoClose && nextDirection == directions[0]) { + break; // colinear with first + } + closedOrMoved = autoClose; + if (directions[corners - 1] == nextDirection) { + if (3 == corners && SkPath::kLine_Verb == verb) { + thirdCorner = lineEnd; + } + lineStart = lineEnd; + break; // colinear segment + } + directions[corners++] = nextDirection; + // opposite lines must point in opposite directions; xoring them should equal 2 + switch (corners) { + case 2: + firstCorner = lineStart; + break; + case 3: + if ((directions[0] ^ directions[2]) != 2) { + return false; + } + thirdCorner = lineEnd; + break; + case 4: + if ((directions[1] ^ directions[3]) != 2) { + return false; + } + break; + default: + return false; // too many direction changes + } + lineStart = lineEnd; + break; + } + case SkPath::kQuad_Verb: + case SkPath::kConic_Verb: + case SkPath::kCubic_Verb: + return false; // quadratic, cubic not allowed + case SkPath::kMove_Verb: + if (allowPartial && !autoClose && directions[0] >= 0) { + insertClose = true; + *currVerb -= 1; // try move again afterwards + goto addMissingClose; + } + if (pts != *ptsPtr) { + return false; + } + if (!corners) { + firstPt = pts; + } else { + closeXY = *firstPt - *lastPt; + if (closeXY.fX && closeXY.fY) { + return false; // we're diagonal, abort + } + } + lineStart = *pts++; + closedOrMoved = true; + break; + default: + SkDEBUGFAIL("unexpected verb"); + break; + } + *currVerb += 1; + addMissingClose: + ; + } + // Success if 4 corners and first point equals last + if (corners < 3 || corners > 4) { + return false; + } + if (savePts) { + *ptsPtr = savePts; + } + // check if close generates diagonal + closeXY = *firstPt - *lastPt; + if (closeXY.fX && closeXY.fY) { + return false; + } + if (rect) { + rect->set(firstCorner, thirdCorner); + } + if (isClosed) { + *isClosed = autoClose; + } + if (direction) { + *direction = directions[0] == ((directions[1] + 1) & 3) ? + SkPathDirection::kCW : SkPathDirection::kCCW; + } + return true; +} + + +bool SkPathPriv::IsNestedFillRects(const SkPath& path, SkRect rects[2], SkPathDirection dirs[2]) { + SkDEBUGCODE(path.validate();) + int currVerb = 0; + const SkPoint* pts = path.fPathRef->points(); + SkPathDirection testDirs[2]; + SkRect testRects[2]; + if (!IsRectContour(path, true, &currVerb, &pts, nullptr, &testDirs[0], &testRects[0])) { + return false; + } + if (IsRectContour(path, false, &currVerb, &pts, nullptr, &testDirs[1], &testRects[1])) { + if (testRects[0].contains(testRects[1])) { + if (rects) { + rects[0] = testRects[0]; + rects[1] = testRects[1]; + } + if (dirs) { + dirs[0] = testDirs[0]; + dirs[1] = testDirs[1]; + } + return true; + } + if (testRects[1].contains(testRects[0])) { + if (rects) { + rects[0] = testRects[1]; + rects[1] = testRects[0]; + } + if (dirs) { + dirs[0] = testDirs[1]; + dirs[1] = testDirs[0]; + } + return true; + } + } + return false; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +struct SkHalfPlane { + SkScalar fA, fB, fC; + + SkScalar eval(SkScalar x, SkScalar y) const { + return fA * x + fB * y + fC; + } + SkScalar operator()(SkScalar x, SkScalar y) const { return this->eval(x, y); } + + bool normalize() { + double a = fA; + double b = fB; + double c = fC; + double dmag = sqrt(a * a + b * b); + // length of initial plane normal is zero + if (dmag == 0) { + fA = fB = 0; + fC = SK_Scalar1; + return true; + } + double dscale = sk_ieee_double_divide(1.0, dmag); + a *= dscale; + b *= dscale; + c *= dscale; + // check if we're not finite, or normal is zero-length + if (!sk_float_isfinite(a) || !sk_float_isfinite(b) || !sk_float_isfinite(c) || + (a == 0 && b == 0)) { + fA = fB = 0; + fC = SK_Scalar1; + return false; + } + fA = a; + fB = b; + fC = c; + return true; + } + + enum Result { + kAllNegative, + kAllPositive, + kMixed + }; + Result test(const SkRect& bounds) const { + // check whether the diagonal aligned with the normal crosses the plane + SkPoint diagMin, diagMax; + if (fA >= 0) { + diagMin.fX = bounds.fLeft; + diagMax.fX = bounds.fRight; + } else { + diagMin.fX = bounds.fRight; + diagMax.fX = bounds.fLeft; + } + if (fB >= 0) { + diagMin.fY = bounds.fTop; + diagMax.fY = bounds.fBottom; + } else { + diagMin.fY = bounds.fBottom; + diagMax.fY = bounds.fTop; + } + SkScalar test = this->eval(diagMin.fX, diagMin.fY); + SkScalar sign = test*this->eval(diagMax.fX, diagMax.fY); + if (sign > 0) { + // the path is either all on one side of the half-plane or the other + if (test < 0) { + return kAllNegative; + } else { + return kAllPositive; + } + } + return kMixed; + } +}; + +// assumes plane is pre-normalized +// If we fail in our calculations, we return the empty path +static SkPath clip(const SkPath& path, const SkHalfPlane& plane) { + SkMatrix mx, inv; + SkPoint p0 = { -plane.fA*plane.fC, -plane.fB*plane.fC }; + mx.setAll( plane.fB, plane.fA, p0.fX, + -plane.fA, plane.fB, p0.fY, + 0, 0, 1); + if (!mx.invert(&inv)) { + return SkPath(); + } + + SkPath rotated; + path.transform(inv, &rotated); + if (!rotated.isFinite()) { + return SkPath(); + } + + SkScalar big = SK_ScalarMax; + SkRect clip = {-big, 0, big, big }; + + struct Rec { + SkPathBuilder fResult; + SkPoint fPrev = {0,0}; + } rec; + + SkEdgeClipper::ClipPath(rotated, clip, false, + [](SkEdgeClipper* clipper, bool newCtr, void* ctx) { + Rec* rec = (Rec*)ctx; + + bool addLineTo = false; + SkPoint pts[4]; + SkPath::Verb verb; + while ((verb = clipper->next(pts)) != SkPath::kDone_Verb) { + if (newCtr) { + rec->fResult.moveTo(pts[0]); + rec->fPrev = pts[0]; + newCtr = false; + } + + if (addLineTo || pts[0] != rec->fPrev) { + rec->fResult.lineTo(pts[0]); + } + + switch (verb) { + case SkPath::kLine_Verb: + rec->fResult.lineTo(pts[1]); + rec->fPrev = pts[1]; + break; + case SkPath::kQuad_Verb: + rec->fResult.quadTo(pts[1], pts[2]); + rec->fPrev = pts[2]; + break; + case SkPath::kCubic_Verb: + rec->fResult.cubicTo(pts[1], pts[2], pts[3]); + rec->fPrev = pts[3]; + break; + default: break; + } + addLineTo = true; + } + }, &rec); + + rec.fResult.setFillType(path.getFillType()); + SkPath result = rec.fResult.detach().makeTransform(mx); + if (!result.isFinite()) { + result = SkPath(); + } + return result; +} + +// true means we have written to clippedPath +bool SkPathPriv::PerspectiveClip(const SkPath& path, const SkMatrix& matrix, SkPath* clippedPath) { + if (!matrix.hasPerspective()) { + return false; + } + + SkHalfPlane plane { + matrix[SkMatrix::kMPersp0], + matrix[SkMatrix::kMPersp1], + matrix[SkMatrix::kMPersp2] - kW0PlaneDistance + }; + if (plane.normalize()) { + switch (plane.test(path.getBounds())) { + case SkHalfPlane::kAllPositive: + return false; + case SkHalfPlane::kMixed: { + *clippedPath = clip(path, plane); + return true; + } + default: break; // handled outside of the switch + } + } + // clipped out (or failed) + *clippedPath = SkPath(); + return true; +} + +int SkPathPriv::GenIDChangeListenersCount(const SkPath& path) { + return path.fPathRef->genIDChangeListenerCount(); +} + +bool SkPathPriv::IsAxisAligned(const SkPath& path) { + // Conservative (quick) test to see if all segments are axis-aligned. + // Multiple contours might give a false-negative, but for speed, we ignore that + // and just look at the raw points. + + const SkPoint* pts = path.fPathRef->points(); + const int count = path.fPathRef->countPoints(); + + for (int i = 1; i < count; ++i) { + if (pts[i-1].fX != pts[i].fX && pts[i-1].fY != pts[i].fY) { + return false; + } + } + return true; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +SkPathEdgeIter::SkPathEdgeIter(const SkPath& path) { + fMoveToPtr = fPts = path.fPathRef->points(); + fVerbs = path.fPathRef->verbsBegin(); + fVerbsStop = path.fPathRef->verbsEnd(); + fConicWeights = path.fPathRef->conicWeights(); + if (fConicWeights) { + fConicWeights -= 1; // begin one behind + } + + fNeedsCloseLine = false; + fNextIsNewContour = false; + SkDEBUGCODE(fIsConic = false;) +} diff --git a/gfx/skia/skia/src/core/SkPathBuilder.cpp b/gfx/skia/skia/src/core/SkPathBuilder.cpp new file mode 100644 index 0000000000..2ea78257e3 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathBuilder.cpp @@ -0,0 +1,867 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPathBuilder.h" + +#include "include/core/SkMatrix.h" +#include "include/core/SkRRect.h" +#include "include/private/SkPathRef.h" +#include "include/private/base/SkPathEnums.h" +#include "include/private/base/SkSafe32.h" +#include "src/base/SkVx.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkPathPriv.h" + +#include +#include +#include +#include +#include +#include + +SkPathBuilder::SkPathBuilder() { + this->reset(); +} + +SkPathBuilder::SkPathBuilder(SkPathFillType ft) { + this->reset(); + fFillType = ft; +} + +SkPathBuilder::SkPathBuilder(const SkPath& src) { + *this = src; +} + +SkPathBuilder::~SkPathBuilder() { +} + +SkPathBuilder& SkPathBuilder::reset() { + fPts.clear(); + fVerbs.clear(); + fConicWeights.clear(); + fFillType = SkPathFillType::kWinding; + fIsVolatile = false; + + // these are internal state + + fSegmentMask = 0; + fLastMovePoint = {0, 0}; + fLastMoveIndex = -1; // illegal + fNeedsMoveVerb = true; + + return *this; +} + +SkPathBuilder& SkPathBuilder::operator=(const SkPath& src) { + this->reset().setFillType(src.getFillType()); + + for (auto [verb, pts, w] : SkPathPriv::Iterate(src)) { + switch (verb) { + case SkPathVerb::kMove: this->moveTo(pts[0]); break; + case SkPathVerb::kLine: this->lineTo(pts[1]); break; + case SkPathVerb::kQuad: this->quadTo(pts[1], pts[2]); break; + case SkPathVerb::kConic: this->conicTo(pts[1], pts[2], w[0]); break; + case SkPathVerb::kCubic: this->cubicTo(pts[1], pts[2], pts[3]); break; + case SkPathVerb::kClose: this->close(); break; + } + } + return *this; +} + +void SkPathBuilder::incReserve(int extraPtCount, int extraVbCount) { + fPts.reserve_back( Sk32_sat_add(fPts.size(), extraPtCount)); + fVerbs.reserve_back(Sk32_sat_add(fVerbs.size(), extraVbCount)); +} + +SkRect SkPathBuilder::computeBounds() const { + SkRect bounds; + bounds.setBounds(fPts.begin(), fPts.size()); + return bounds; +} + +/* + * Some old behavior in SkPath -- should we keep it? + * + * After each edit (i.e. adding a verb) + this->setConvexityType(SkPathConvexity::kUnknown); + this->setFirstDirection(SkPathPriv::kUnknown_FirstDirection); + */ + +SkPathBuilder& SkPathBuilder::moveTo(SkPoint pt) { + // only needed while SkPath is mutable + fLastMoveIndex = SkToInt(fPts.size()); + + fPts.push_back(pt); + fVerbs.push_back((uint8_t)SkPathVerb::kMove); + + fLastMovePoint = pt; + fNeedsMoveVerb = false; + return *this; +} + +SkPathBuilder& SkPathBuilder::lineTo(SkPoint pt) { + this->ensureMove(); + + fPts.push_back(pt); + fVerbs.push_back((uint8_t)SkPathVerb::kLine); + + fSegmentMask |= kLine_SkPathSegmentMask; + return *this; +} + +SkPathBuilder& SkPathBuilder::quadTo(SkPoint pt1, SkPoint pt2) { + this->ensureMove(); + + SkPoint* p = fPts.push_back_n(2); + p[0] = pt1; + p[1] = pt2; + fVerbs.push_back((uint8_t)SkPathVerb::kQuad); + + fSegmentMask |= kQuad_SkPathSegmentMask; + return *this; +} + +SkPathBuilder& SkPathBuilder::conicTo(SkPoint pt1, SkPoint pt2, SkScalar w) { + this->ensureMove(); + + SkPoint* p = fPts.push_back_n(2); + p[0] = pt1; + p[1] = pt2; + fVerbs.push_back((uint8_t)SkPathVerb::kConic); + fConicWeights.push_back(w); + + fSegmentMask |= kConic_SkPathSegmentMask; + return *this; +} + +SkPathBuilder& SkPathBuilder::cubicTo(SkPoint pt1, SkPoint pt2, SkPoint pt3) { + this->ensureMove(); + + SkPoint* p = fPts.push_back_n(3); + p[0] = pt1; + p[1] = pt2; + p[2] = pt3; + fVerbs.push_back((uint8_t)SkPathVerb::kCubic); + + fSegmentMask |= kCubic_SkPathSegmentMask; + return *this; +} + +SkPathBuilder& SkPathBuilder::close() { + if (!fVerbs.empty()) { + this->ensureMove(); + + fVerbs.push_back((uint8_t)SkPathVerb::kClose); + + // fLastMovePoint stays where it is -- the previous moveTo + fNeedsMoveVerb = true; + } + return *this; +} + +/////////////////////////////////////////////////////////////////////////////////////////// + +SkPathBuilder& SkPathBuilder::rLineTo(SkPoint p1) { + this->ensureMove(); + return this->lineTo(fPts.back() + p1); +} + +SkPathBuilder& SkPathBuilder::rQuadTo(SkPoint p1, SkPoint p2) { + this->ensureMove(); + SkPoint base = fPts.back(); + return this->quadTo(base + p1, base + p2); +} + +SkPathBuilder& SkPathBuilder::rConicTo(SkPoint p1, SkPoint p2, SkScalar w) { + this->ensureMove(); + SkPoint base = fPts.back(); + return this->conicTo(base + p1, base + p2, w); +} + +SkPathBuilder& SkPathBuilder::rCubicTo(SkPoint p1, SkPoint p2, SkPoint p3) { + this->ensureMove(); + SkPoint base = fPts.back(); + return this->cubicTo(base + p1, base + p2, base + p3); +} + +/////////////////////////////////////////////////////////////////////////////////////////// + +SkPath SkPathBuilder::make(sk_sp pr) const { + auto convexity = SkPathConvexity::kUnknown; + SkPathFirstDirection dir = SkPathFirstDirection::kUnknown; + + switch (fIsA) { + case kIsA_Oval: + pr->setIsOval( true, fIsACCW, fIsAStart); + convexity = SkPathConvexity::kConvex; + dir = fIsACCW ? SkPathFirstDirection::kCCW : SkPathFirstDirection::kCW; + break; + case kIsA_RRect: + pr->setIsRRect(true, fIsACCW, fIsAStart); + convexity = SkPathConvexity::kConvex; + dir = fIsACCW ? SkPathFirstDirection::kCCW : SkPathFirstDirection::kCW; + break; + default: break; + } + + // Wonder if we can combine convexity and dir internally... + // unknown, convex_cw, convex_ccw, concave + // Do we ever have direction w/o convexity, or viceversa (inside path)? + // + auto path = SkPath(std::move(pr), fFillType, fIsVolatile, convexity, dir); + + // This hopefully can go away in the future when Paths are immutable, + // but if while they are still editable, we need to correctly set this. + const uint8_t* start = path.fPathRef->verbsBegin(); + const uint8_t* stop = path.fPathRef->verbsEnd(); + if (start < stop) { + SkASSERT(fLastMoveIndex >= 0); + // peek at the last verb, to know if our last contour is closed + const bool isClosed = (stop[-1] == (uint8_t)SkPathVerb::kClose); + path.fLastMoveToIndex = isClosed ? ~fLastMoveIndex : fLastMoveIndex; + } + + return path; +} + +SkPath SkPathBuilder::snapshot() const { + return this->make(sk_sp(new SkPathRef(fPts, + fVerbs, + fConicWeights, + fSegmentMask))); +} + +SkPath SkPathBuilder::detach() { + auto path = this->make(sk_sp(new SkPathRef(std::move(fPts), + std::move(fVerbs), + std::move(fConicWeights), + fSegmentMask))); + this->reset(); + return path; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static bool arc_is_lone_point(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, + SkPoint* pt) { + if (0 == sweepAngle && (0 == startAngle || SkIntToScalar(360) == startAngle)) { + // Chrome uses this path to move into and out of ovals. If not + // treated as a special case the moves can distort the oval's + // bounding box (and break the circle special case). + pt->set(oval.fRight, oval.centerY()); + return true; + } else if (0 == oval.width() && 0 == oval.height()) { + // Chrome will sometimes create 0 radius round rects. Having degenerate + // quad segments in the path prevents the path from being recognized as + // a rect. + // TODO: optimizing the case where only one of width or height is zero + // should also be considered. This case, however, doesn't seem to be + // as common as the single point case. + pt->set(oval.fRight, oval.fTop); + return true; + } + return false; +} + +// Return the unit vectors pointing at the start/stop points for the given start/sweep angles +// +static void angles_to_unit_vectors(SkScalar startAngle, SkScalar sweepAngle, + SkVector* startV, SkVector* stopV, SkRotationDirection* dir) { + SkScalar startRad = SkDegreesToRadians(startAngle), + stopRad = SkDegreesToRadians(startAngle + sweepAngle); + + startV->fY = SkScalarSinSnapToZero(startRad); + startV->fX = SkScalarCosSnapToZero(startRad); + stopV->fY = SkScalarSinSnapToZero(stopRad); + stopV->fX = SkScalarCosSnapToZero(stopRad); + + /* If the sweep angle is nearly (but less than) 360, then due to precision + loss in radians-conversion and/or sin/cos, we may end up with coincident + vectors, which will fool SkBuildQuadArc into doing nothing (bad) instead + of drawing a nearly complete circle (good). + e.g. canvas.drawArc(0, 359.99, ...) + -vs- canvas.drawArc(0, 359.9, ...) + We try to detect this edge case, and tweak the stop vector + */ + if (*startV == *stopV) { + SkScalar sw = SkScalarAbs(sweepAngle); + if (sw < SkIntToScalar(360) && sw > SkIntToScalar(359)) { + // make a guess at a tiny angle (in radians) to tweak by + SkScalar deltaRad = SkScalarCopySign(SK_Scalar1/512, sweepAngle); + // not sure how much will be enough, so we use a loop + do { + stopRad -= deltaRad; + stopV->fY = SkScalarSinSnapToZero(stopRad); + stopV->fX = SkScalarCosSnapToZero(stopRad); + } while (*startV == *stopV); + } + } + *dir = sweepAngle > 0 ? kCW_SkRotationDirection : kCCW_SkRotationDirection; +} + +/** + * If this returns 0, then the caller should just line-to the singlePt, else it should + * ignore singlePt and append the specified number of conics. + */ +static int build_arc_conics(const SkRect& oval, const SkVector& start, const SkVector& stop, + SkRotationDirection dir, SkConic conics[SkConic::kMaxConicsForArc], + SkPoint* singlePt) { + SkMatrix matrix; + + matrix.setScale(SkScalarHalf(oval.width()), SkScalarHalf(oval.height())); + matrix.postTranslate(oval.centerX(), oval.centerY()); + + int count = SkConic::BuildUnitArc(start, stop, dir, &matrix, conics); + if (0 == count) { + matrix.mapXY(stop.x(), stop.y(), singlePt); + } + return count; +} + +static bool nearly_equal(const SkPoint& a, const SkPoint& b) { + return SkScalarNearlyEqual(a.fX, b.fX) + && SkScalarNearlyEqual(a.fY, b.fY); +} + +SkPathBuilder& SkPathBuilder::arcTo(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, + bool forceMoveTo) { + if (oval.width() < 0 || oval.height() < 0) { + return *this; + } + + if (fVerbs.empty()) { + forceMoveTo = true; + } + + SkPoint lonePt; + if (arc_is_lone_point(oval, startAngle, sweepAngle, &lonePt)) { + return forceMoveTo ? this->moveTo(lonePt) : this->lineTo(lonePt); + } + + SkVector startV, stopV; + SkRotationDirection dir; + angles_to_unit_vectors(startAngle, sweepAngle, &startV, &stopV, &dir); + + SkPoint singlePt; + + // Adds a move-to to 'pt' if forceMoveTo is true. Otherwise a lineTo unless we're sufficiently + // close to 'pt' currently. This prevents spurious lineTos when adding a series of contiguous + // arcs from the same oval. + auto addPt = [forceMoveTo, this](const SkPoint& pt) { + if (forceMoveTo) { + this->moveTo(pt); + } else if (!nearly_equal(fPts.back(), pt)) { + this->lineTo(pt); + } + }; + + // At this point, we know that the arc is not a lone point, but startV == stopV + // indicates that the sweepAngle is too small such that angles_to_unit_vectors + // cannot handle it. + if (startV == stopV) { + SkScalar endAngle = SkDegreesToRadians(startAngle + sweepAngle); + SkScalar radiusX = oval.width() / 2; + SkScalar radiusY = oval.height() / 2; + // We do not use SkScalar[Sin|Cos]SnapToZero here. When sin(startAngle) is 0 and sweepAngle + // is very small and radius is huge, the expected behavior here is to draw a line. But + // calling SkScalarSinSnapToZero will make sin(endAngle) be 0 which will then draw a dot. + singlePt.set(oval.centerX() + radiusX * SkScalarCos(endAngle), + oval.centerY() + radiusY * SkScalarSin(endAngle)); + addPt(singlePt); + return *this; + } + + SkConic conics[SkConic::kMaxConicsForArc]; + int count = build_arc_conics(oval, startV, stopV, dir, conics, &singlePt); + if (count) { + this->incReserve(count * 2 + 1); + const SkPoint& pt = conics[0].fPts[0]; + addPt(pt); + for (int i = 0; i < count; ++i) { + this->conicTo(conics[i].fPts[1], conics[i].fPts[2], conics[i].fW); + } + } else { + addPt(singlePt); + } + return *this; +} + +SkPathBuilder& SkPathBuilder::addArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle) { + if (oval.isEmpty() || 0 == sweepAngle) { + return *this; + } + + const SkScalar kFullCircleAngle = SkIntToScalar(360); + + if (sweepAngle >= kFullCircleAngle || sweepAngle <= -kFullCircleAngle) { + // We can treat the arc as an oval if it begins at one of our legal starting positions. + // See SkPath::addOval() docs. + SkScalar startOver90 = startAngle / 90.f; + SkScalar startOver90I = SkScalarRoundToScalar(startOver90); + SkScalar error = startOver90 - startOver90I; + if (SkScalarNearlyEqual(error, 0)) { + // Index 1 is at startAngle == 0. + SkScalar startIndex = std::fmod(startOver90I + 1.f, 4.f); + startIndex = startIndex < 0 ? startIndex + 4.f : startIndex; + return this->addOval(oval, sweepAngle > 0 ? SkPathDirection::kCW : SkPathDirection::kCCW, + (unsigned) startIndex); + } + } + return this->arcTo(oval, startAngle, sweepAngle, true); +} + +SkPathBuilder& SkPathBuilder::arcTo(SkPoint p1, SkPoint p2, SkScalar radius) { + this->ensureMove(); + + if (radius == 0) { + return this->lineTo(p1); + } + + // need to know our prev pt so we can construct tangent vectors + SkPoint start = fPts.back(); + + // need double precision for these calcs. + skvx::double2 befored = normalize(skvx::double2{p1.fX - start.fX, p1.fY - start.fY}); + skvx::double2 afterd = normalize(skvx::double2{p2.fX - p1.fX, p2.fY - p1.fY}); + double cosh = dot(befored, afterd); + double sinh = cross(befored, afterd); + + // If the previous point equals the first point, befored will be denormalized. + // If the two points equal, afterd will be denormalized. + // If the second point equals the first point, sinh will be zero. + // In all these cases, we cannot construct an arc, so we construct a line to the first point. + if (!isfinite(befored) || !isfinite(afterd) || SkScalarNearlyZero(SkDoubleToScalar(sinh))) { + return this->lineTo(p1); + } + + // safe to convert back to floats now + SkScalar dist = SkScalarAbs(SkDoubleToScalar(radius * (1 - cosh) / sinh)); + SkScalar xx = p1.fX - dist * befored[0]; + SkScalar yy = p1.fY - dist * befored[1]; + + SkVector after = SkVector::Make(afterd[0], afterd[1]); + after.setLength(dist); + this->lineTo(xx, yy); + SkScalar weight = SkScalarSqrt(SkDoubleToScalar(SK_ScalarHalf + cosh * 0.5)); + return this->conicTo(p1, p1 + after, weight); +} + +// This converts the SVG arc to conics. +// Partly adapted from Niko's code in kdelibs/kdecore/svgicons. +// Then transcribed from webkit/chrome's SVGPathNormalizer::decomposeArcToCubic() +// See also SVG implementation notes: +// http://www.w3.org/TR/SVG/implnote.html#ArcConversionEndpointToCenter +// Note that arcSweep bool value is flipped from the original implementation. +SkPathBuilder& SkPathBuilder::arcTo(SkPoint rad, SkScalar angle, SkPathBuilder::ArcSize arcLarge, + SkPathDirection arcSweep, SkPoint endPt) { + this->ensureMove(); + + SkPoint srcPts[2] = { fPts.back(), endPt }; + + // If rx = 0 or ry = 0 then this arc is treated as a straight line segment (a "lineto") + // joining the endpoints. + // http://www.w3.org/TR/SVG/implnote.html#ArcOutOfRangeParameters + if (!rad.fX || !rad.fY) { + return this->lineTo(endPt); + } + // If the current point and target point for the arc are identical, it should be treated as a + // zero length path. This ensures continuity in animations. + if (srcPts[0] == srcPts[1]) { + return this->lineTo(endPt); + } + SkScalar rx = SkScalarAbs(rad.fX); + SkScalar ry = SkScalarAbs(rad.fY); + SkVector midPointDistance = srcPts[0] - srcPts[1]; + midPointDistance *= 0.5f; + + SkMatrix pointTransform; + pointTransform.setRotate(-angle); + + SkPoint transformedMidPoint; + pointTransform.mapPoints(&transformedMidPoint, &midPointDistance, 1); + SkScalar squareRx = rx * rx; + SkScalar squareRy = ry * ry; + SkScalar squareX = transformedMidPoint.fX * transformedMidPoint.fX; + SkScalar squareY = transformedMidPoint.fY * transformedMidPoint.fY; + + // Check if the radii are big enough to draw the arc, scale radii if not. + // http://www.w3.org/TR/SVG/implnote.html#ArcCorrectionOutOfRangeRadii + SkScalar radiiScale = squareX / squareRx + squareY / squareRy; + if (radiiScale > 1) { + radiiScale = SkScalarSqrt(radiiScale); + rx *= radiiScale; + ry *= radiiScale; + } + + pointTransform.setScale(1 / rx, 1 / ry); + pointTransform.preRotate(-angle); + + SkPoint unitPts[2]; + pointTransform.mapPoints(unitPts, srcPts, (int) std::size(unitPts)); + SkVector delta = unitPts[1] - unitPts[0]; + + SkScalar d = delta.fX * delta.fX + delta.fY * delta.fY; + SkScalar scaleFactorSquared = std::max(1 / d - 0.25f, 0.f); + + SkScalar scaleFactor = SkScalarSqrt(scaleFactorSquared); + if ((arcSweep == SkPathDirection::kCCW) != SkToBool(arcLarge)) { // flipped from the original implementation + scaleFactor = -scaleFactor; + } + delta.scale(scaleFactor); + SkPoint centerPoint = unitPts[0] + unitPts[1]; + centerPoint *= 0.5f; + centerPoint.offset(-delta.fY, delta.fX); + unitPts[0] -= centerPoint; + unitPts[1] -= centerPoint; + SkScalar theta1 = SkScalarATan2(unitPts[0].fY, unitPts[0].fX); + SkScalar theta2 = SkScalarATan2(unitPts[1].fY, unitPts[1].fX); + SkScalar thetaArc = theta2 - theta1; + if (thetaArc < 0 && (arcSweep == SkPathDirection::kCW)) { // arcSweep flipped from the original implementation + thetaArc += SK_ScalarPI * 2; + } else if (thetaArc > 0 && (arcSweep != SkPathDirection::kCW)) { // arcSweep flipped from the original implementation + thetaArc -= SK_ScalarPI * 2; + } + + // Very tiny angles cause our subsequent math to go wonky (skbug.com/9272) + // so we do a quick check here. The precise tolerance amount is just made up. + // PI/million happens to fix the bug in 9272, but a larger value is probably + // ok too. + if (SkScalarAbs(thetaArc) < (SK_ScalarPI / (1000 * 1000))) { + return this->lineTo(endPt); + } + + pointTransform.setRotate(angle); + pointTransform.preScale(rx, ry); + + // the arc may be slightly bigger than 1/4 circle, so allow up to 1/3rd + int segments = SkScalarCeilToInt(SkScalarAbs(thetaArc / (2 * SK_ScalarPI / 3))); + SkScalar thetaWidth = thetaArc / segments; + SkScalar t = SkScalarTan(0.5f * thetaWidth); + if (!SkScalarIsFinite(t)) { + return *this; + } + SkScalar startTheta = theta1; + SkScalar w = SkScalarSqrt(SK_ScalarHalf + SkScalarCos(thetaWidth) * SK_ScalarHalf); + auto scalar_is_integer = [](SkScalar scalar) -> bool { + return scalar == SkScalarFloorToScalar(scalar); + }; + bool expectIntegers = SkScalarNearlyZero(SK_ScalarPI/2 - SkScalarAbs(thetaWidth)) && + scalar_is_integer(rx) && scalar_is_integer(ry) && + scalar_is_integer(endPt.fX) && scalar_is_integer(endPt.fY); + + for (int i = 0; i < segments; ++i) { + SkScalar endTheta = startTheta + thetaWidth, + sinEndTheta = SkScalarSinSnapToZero(endTheta), + cosEndTheta = SkScalarCosSnapToZero(endTheta); + + unitPts[1].set(cosEndTheta, sinEndTheta); + unitPts[1] += centerPoint; + unitPts[0] = unitPts[1]; + unitPts[0].offset(t * sinEndTheta, -t * cosEndTheta); + SkPoint mapped[2]; + pointTransform.mapPoints(mapped, unitPts, (int) std::size(unitPts)); + /* + Computing the arc width introduces rounding errors that cause arcs to start + outside their marks. A round rect may lose convexity as a result. If the input + values are on integers, place the conic on integers as well. + */ + if (expectIntegers) { + for (SkPoint& point : mapped) { + point.fX = SkScalarRoundToScalar(point.fX); + point.fY = SkScalarRoundToScalar(point.fY); + } + } + this->conicTo(mapped[0], mapped[1], w); + startTheta = endTheta; + } + + // The final point should match the input point (by definition); replace it to + // ensure that rounding errors in the above math don't cause any problems. + fPts.back() = endPt; + return *this; +} + +/////////////////////////////////////////////////////////////////////////////////////////// + +namespace { + template class PointIterator { + public: + PointIterator(SkPathDirection dir, unsigned startIndex) + : fCurrent(startIndex % N) + , fAdvance(dir == SkPathDirection::kCW ? 1 : N - 1) + {} + + const SkPoint& current() const { + SkASSERT(fCurrent < N); + return fPts[fCurrent]; + } + + const SkPoint& next() { + fCurrent = (fCurrent + fAdvance) % N; + return this->current(); + } + + protected: + SkPoint fPts[N]; + + private: + unsigned fCurrent; + unsigned fAdvance; + }; + + class RectPointIterator : public PointIterator<4> { + public: + RectPointIterator(const SkRect& rect, SkPathDirection dir, unsigned startIndex) + : PointIterator(dir, startIndex) { + + fPts[0] = SkPoint::Make(rect.fLeft, rect.fTop); + fPts[1] = SkPoint::Make(rect.fRight, rect.fTop); + fPts[2] = SkPoint::Make(rect.fRight, rect.fBottom); + fPts[3] = SkPoint::Make(rect.fLeft, rect.fBottom); + } + }; + + class OvalPointIterator : public PointIterator<4> { + public: + OvalPointIterator(const SkRect& oval, SkPathDirection dir, unsigned startIndex) + : PointIterator(dir, startIndex) { + + const SkScalar cx = oval.centerX(); + const SkScalar cy = oval.centerY(); + + fPts[0] = SkPoint::Make(cx, oval.fTop); + fPts[1] = SkPoint::Make(oval.fRight, cy); + fPts[2] = SkPoint::Make(cx, oval.fBottom); + fPts[3] = SkPoint::Make(oval.fLeft, cy); + } + }; + + class RRectPointIterator : public PointIterator<8> { + public: + RRectPointIterator(const SkRRect& rrect, SkPathDirection dir, unsigned startIndex) + : PointIterator(dir, startIndex) + { + const SkRect& bounds = rrect.getBounds(); + const SkScalar L = bounds.fLeft; + const SkScalar T = bounds.fTop; + const SkScalar R = bounds.fRight; + const SkScalar B = bounds.fBottom; + + fPts[0] = SkPoint::Make(L + rrect.radii(SkRRect::kUpperLeft_Corner).fX, T); + fPts[1] = SkPoint::Make(R - rrect.radii(SkRRect::kUpperRight_Corner).fX, T); + fPts[2] = SkPoint::Make(R, T + rrect.radii(SkRRect::kUpperRight_Corner).fY); + fPts[3] = SkPoint::Make(R, B - rrect.radii(SkRRect::kLowerRight_Corner).fY); + fPts[4] = SkPoint::Make(R - rrect.radii(SkRRect::kLowerRight_Corner).fX, B); + fPts[5] = SkPoint::Make(L + rrect.radii(SkRRect::kLowerLeft_Corner).fX, B); + fPts[6] = SkPoint::Make(L, B - rrect.radii(SkRRect::kLowerLeft_Corner).fY); + fPts[7] = SkPoint::Make(L, T + rrect.radii(SkRRect::kUpperLeft_Corner).fY); + } + }; +} // anonymous namespace + + +SkPathBuilder& SkPathBuilder::addRect(const SkRect& rect, SkPathDirection dir, unsigned index) { + const int kPts = 4; // moveTo + 3 lines + const int kVerbs = 5; // moveTo + 3 lines + close + this->incReserve(kPts, kVerbs); + + RectPointIterator iter(rect, dir, index); + + this->moveTo(iter.current()); + this->lineTo(iter.next()); + this->lineTo(iter.next()); + this->lineTo(iter.next()); + return this->close(); +} + +SkPathBuilder& SkPathBuilder::addOval(const SkRect& oval, SkPathDirection dir, unsigned index) { + const IsA prevIsA = fIsA; + + const int kPts = 9; // moveTo + 4 conics(2 pts each) + const int kVerbs = 6; // moveTo + 4 conics + close + this->incReserve(kPts, kVerbs); + + OvalPointIterator ovalIter(oval, dir, index); + RectPointIterator rectIter(oval, dir, index + (dir == SkPathDirection::kCW ? 0 : 1)); + + // The corner iterator pts are tracking "behind" the oval/radii pts. + + this->moveTo(ovalIter.current()); + for (unsigned i = 0; i < 4; ++i) { + this->conicTo(rectIter.next(), ovalIter.next(), SK_ScalarRoot2Over2); + } + this->close(); + + if (prevIsA == kIsA_JustMoves) { + fIsA = kIsA_Oval; + fIsACCW = (dir == SkPathDirection::kCCW); + fIsAStart = index % 4; + } + return *this; +} + +SkPathBuilder& SkPathBuilder::addRRect(const SkRRect& rrect, SkPathDirection dir, unsigned index) { + const IsA prevIsA = fIsA; + const SkRect& bounds = rrect.getBounds(); + + if (rrect.isRect() || rrect.isEmpty()) { + // degenerate(rect) => radii points are collapsing + this->addRect(bounds, dir, (index + 1) / 2); + } else if (rrect.isOval()) { + // degenerate(oval) => line points are collapsing + this->addOval(bounds, dir, index / 2); + } else { + // we start with a conic on odd indices when moving CW vs. even indices when moving CCW + const bool startsWithConic = ((index & 1) == (dir == SkPathDirection::kCW)); + const SkScalar weight = SK_ScalarRoot2Over2; + + const int kVerbs = startsWithConic + ? 9 // moveTo + 4x conicTo + 3x lineTo + close + : 10; // moveTo + 4x lineTo + 4x conicTo + close + this->incReserve(kVerbs); + + RRectPointIterator rrectIter(rrect, dir, index); + // Corner iterator indices follow the collapsed radii model, + // adjusted such that the start pt is "behind" the radii start pt. + const unsigned rectStartIndex = index / 2 + (dir == SkPathDirection::kCW ? 0 : 1); + RectPointIterator rectIter(bounds, dir, rectStartIndex); + + this->moveTo(rrectIter.current()); + if (startsWithConic) { + for (unsigned i = 0; i < 3; ++i) { + this->conicTo(rectIter.next(), rrectIter.next(), weight); + this->lineTo(rrectIter.next()); + } + this->conicTo(rectIter.next(), rrectIter.next(), weight); + // final lineTo handled by close(). + } else { + for (unsigned i = 0; i < 4; ++i) { + this->lineTo(rrectIter.next()); + this->conicTo(rectIter.next(), rrectIter.next(), weight); + } + } + this->close(); + } + + if (prevIsA == kIsA_JustMoves) { + fIsA = kIsA_RRect; + fIsACCW = (dir == SkPathDirection::kCCW); + fIsAStart = index % 8; + } + return *this; +} + +SkPathBuilder& SkPathBuilder::addCircle(SkScalar x, SkScalar y, SkScalar r, SkPathDirection dir) { + if (r >= 0) { + this->addOval(SkRect::MakeLTRB(x - r, y - r, x + r, y + r), dir); + } + return *this; +} + +SkPathBuilder& SkPathBuilder::addPolygon(const SkPoint pts[], int count, bool isClosed) { + if (count <= 0) { + return *this; + } + + this->moveTo(pts[0]); + this->polylineTo(&pts[1], count - 1); + if (isClosed) { + this->close(); + } + return *this; +} + +SkPathBuilder& SkPathBuilder::polylineTo(const SkPoint pts[], int count) { + if (count > 0) { + this->ensureMove(); + + this->incReserve(count, count); + memcpy(fPts.push_back_n(count), pts, count * sizeof(SkPoint)); + memset(fVerbs.push_back_n(count), (uint8_t)SkPathVerb::kLine, count); + fSegmentMask |= kLine_SkPathSegmentMask; + } + return *this; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +SkPathBuilder& SkPathBuilder::offset(SkScalar dx, SkScalar dy) { + for (auto& p : fPts) { + p += {dx, dy}; + } + return *this; +} + +SkPathBuilder& SkPathBuilder::addPath(const SkPath& src) { + SkPath::RawIter iter(src); + SkPoint pts[4]; + SkPath::Verb verb; + + while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { + switch (verb) { + case SkPath::kMove_Verb: this->moveTo (pts[0]); break; + case SkPath::kLine_Verb: this->lineTo (pts[1]); break; + case SkPath::kQuad_Verb: this->quadTo (pts[1], pts[2]); break; + case SkPath::kCubic_Verb: this->cubicTo(pts[1], pts[2], pts[3]); break; + case SkPath::kConic_Verb: this->conicTo(pts[1], pts[2], iter.conicWeight()); break; + case SkPath::kClose_Verb: this->close(); break; + case SkPath::kDone_Verb: SkUNREACHABLE; + } + } + + return *this; +} + +SkPathBuilder& SkPathBuilder::privateReverseAddPath(const SkPath& src) { + + const uint8_t* verbsBegin = src.fPathRef->verbsBegin(); + const uint8_t* verbs = src.fPathRef->verbsEnd(); + const SkPoint* pts = src.fPathRef->pointsEnd(); + const SkScalar* conicWeights = src.fPathRef->conicWeightsEnd(); + + bool needMove = true; + bool needClose = false; + while (verbs > verbsBegin) { + uint8_t v = *--verbs; + int n = SkPathPriv::PtsInVerb(v); + + if (needMove) { + --pts; + this->moveTo(pts->fX, pts->fY); + needMove = false; + } + pts -= n; + switch ((SkPathVerb)v) { + case SkPathVerb::kMove: + if (needClose) { + this->close(); + needClose = false; + } + needMove = true; + pts += 1; // so we see the point in "if (needMove)" above + break; + case SkPathVerb::kLine: + this->lineTo(pts[0]); + break; + case SkPathVerb::kQuad: + this->quadTo(pts[1], pts[0]); + break; + case SkPathVerb::kConic: + this->conicTo(pts[1], pts[0], *--conicWeights); + break; + case SkPathVerb::kCubic: + this->cubicTo(pts[2], pts[1], pts[0]); + break; + case SkPathVerb::kClose: + needClose = true; + break; + default: + SkDEBUGFAIL("unexpected verb"); + } + } + return *this; +} diff --git a/gfx/skia/skia/src/core/SkPathEffect.cpp b/gfx/skia/skia/src/core/SkPathEffect.cpp new file mode 100644 index 0000000000..785cc62f72 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathEffect.cpp @@ -0,0 +1,214 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "src/core/SkPathEffectBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +/////////////////////////////////////////////////////////////////////////////// + +bool SkPathEffect::filterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* bounds) const { + return this->filterPath(dst, src, rec, bounds, SkMatrix::I()); +} + +bool SkPathEffect::filterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* bounds, const SkMatrix& ctm) const { + SkPath tmp, *tmpDst = dst; + if (dst == &src) { + tmpDst = &tmp; + } + if (as_PEB(this)->onFilterPath(tmpDst, src, rec, bounds, ctm)) { + if (dst == &src) { + *dst = tmp; + } + return true; + } + return false; +} + +bool SkPathEffectBase::asPoints(PointData* results, const SkPath& src, + const SkStrokeRec& rec, const SkMatrix& mx, const SkRect* rect) const { + return this->onAsPoints(results, src, rec, mx, rect); +} + +SkPathEffect::DashType SkPathEffect::asADash(DashInfo* info) const { + return as_PEB(this)->onAsADash(info); +} + +bool SkPathEffect::needsCTM() const { + return as_PEB(this)->onNeedsCTM(); +} + +/////////////////////////////////////////////////////////////////////////////// + +/** \class SkPairPathEffect + + Common baseclass for Compose and Sum. This subclass manages two pathEffects, + including flattening them. It does nothing in filterPath, and is only useful + for managing the lifetimes of its two arguments. + */ +class SkPairPathEffect : public SkPathEffectBase { +protected: + SkPairPathEffect(sk_sp pe0, sk_sp pe1) + : fPE0(std::move(pe0)), fPE1(std::move(pe1)) + { + SkASSERT(fPE0.get()); + SkASSERT(fPE1.get()); + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeFlattenable(fPE0.get()); + buffer.writeFlattenable(fPE1.get()); + } + + // these are visible to our subclasses + sk_sp fPE0; + sk_sp fPE1; + +private: + using INHERITED = SkPathEffectBase; +}; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +class SkComposePathEffect : public SkPairPathEffect { +public: + /** Construct a pathEffect whose effect is to apply first the inner pathEffect + and the the outer pathEffect (e.g. outer(inner(path))) + The reference counts for outer and inner are both incremented in the constructor, + and decremented in the destructor. + */ + static sk_sp Make(sk_sp outer, sk_sp inner) { + if (!outer) { + return inner; + } + if (!inner) { + return outer; + } + return sk_sp(new SkComposePathEffect(outer, inner)); + } + + SkComposePathEffect(sk_sp outer, sk_sp inner) + : INHERITED(outer, inner) {} + + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* cullRect, const SkMatrix& ctm) const override { + SkPath tmp; + const SkPath* ptr = &src; + + if (fPE1->filterPath(&tmp, src, rec, cullRect, ctm)) { + ptr = &tmp; + } + return fPE0->filterPath(dst, *ptr, rec, cullRect, ctm); + } + + SK_FLATTENABLE_HOOKS(SkComposePathEffect) + + bool computeFastBounds(SkRect* bounds) const override { + // inner (fPE1) is computed first, automatically updating bounds before computing outer. + return as_PEB(fPE1)->computeFastBounds(bounds) && + as_PEB(fPE0)->computeFastBounds(bounds); + } + +private: + // illegal + SkComposePathEffect(const SkComposePathEffect&); + SkComposePathEffect& operator=(const SkComposePathEffect&); + friend class SkPathEffect; + + using INHERITED = SkPairPathEffect; +}; + +sk_sp SkComposePathEffect::CreateProc(SkReadBuffer& buffer) { + sk_sp pe0(buffer.readPathEffect()); + sk_sp pe1(buffer.readPathEffect()); + return SkComposePathEffect::Make(std::move(pe0), std::move(pe1)); +} + +/////////////////////////////////////////////////////////////////////////////// + +/** \class SkSumPathEffect + + This subclass of SkPathEffect applies two pathEffects, one after the other. + Its filterPath() returns true if either of the effects succeeded. + */ +class SkSumPathEffect : public SkPairPathEffect { +public: + /** Construct a pathEffect whose effect is to apply two effects, in sequence. + (e.g. first(path) + second(path)) + The reference counts for first and second are both incremented in the constructor, + and decremented in the destructor. + */ + static sk_sp Make(sk_sp first, sk_sp second) { + if (!first) { + return second; + } + if (!second) { + return first; + } + return sk_sp(new SkSumPathEffect(first, second)); + } + + SkSumPathEffect(sk_sp first, sk_sp second) + : INHERITED(first, second) {} + + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* cullRect, const SkMatrix& ctm) const override { + // always call both, even if the first one succeeds + bool filteredFirst = fPE0->filterPath(dst, src, rec, cullRect, ctm); + bool filteredSecond = fPE1->filterPath(dst, src, rec, cullRect, ctm); + return filteredFirst || filteredSecond; + } + + SK_FLATTENABLE_HOOKS(SkSumPathEffect) + + bool computeFastBounds(SkRect* bounds) const override { + // Unlike Compose(), PE0 modifies the path first for Sum + return as_PEB(fPE0)->computeFastBounds(bounds) && + as_PEB(fPE1)->computeFastBounds(bounds); + } + +private: + // illegal + SkSumPathEffect(const SkSumPathEffect&); + SkSumPathEffect& operator=(const SkSumPathEffect&); + friend class SkPathEffect; + + using INHERITED = SkPairPathEffect; +}; + +sk_sp SkSumPathEffect::CreateProc(SkReadBuffer& buffer) { + sk_sp pe0(buffer.readPathEffect()); + sk_sp pe1(buffer.readPathEffect()); + return SkSumPathEffect::Make(pe0, pe1); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkPathEffect::MakeSum(sk_sp first, sk_sp second) { + return SkSumPathEffect::Make(std::move(first), std::move(second)); +} + +sk_sp SkPathEffect::MakeCompose(sk_sp outer, + sk_sp inner) { + return SkComposePathEffect::Make(std::move(outer), std::move(inner)); +} + +void SkPathEffectBase::RegisterFlattenables() { + SK_REGISTER_FLATTENABLE(SkComposePathEffect); + SK_REGISTER_FLATTENABLE(SkSumPathEffect); +} + +sk_sp SkPathEffect::Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs) { + return sk_sp(static_cast( + SkFlattenable::Deserialize( + kSkPathEffect_Type, data, size, procs).release())); +} diff --git a/gfx/skia/skia/src/core/SkPathEffectBase.h b/gfx/skia/skia/src/core/SkPathEffectBase.h new file mode 100644 index 0000000000..93feea2ee6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathEffectBase.h @@ -0,0 +1,146 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathEffectBase_DEFINED +#define SkPathEffectBase_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" + +class SkPath; +class SkStrokeRec; + +class SkPathEffectBase : public SkPathEffect { +public: + SkPathEffectBase() {} + + /** \class PointData + + PointData aggregates all the information needed to draw the point + primitives returned by an 'asPoints' call. + */ + class PointData { + public: + PointData() + : fFlags(0) + , fPoints(nullptr) + , fNumPoints(0) { + fSize.set(SK_Scalar1, SK_Scalar1); + // 'asPoints' needs to initialize/fill-in 'fClipRect' if it sets + // the kUseClip flag + } + ~PointData() { + delete [] fPoints; + } + + // TODO: consider using passed-in flags to limit the work asPoints does. + // For example, a kNoPath flag could indicate don't bother generating + // stamped solutions. + + // Currently none of these flags are supported. + enum PointFlags { + kCircles_PointFlag = 0x01, // draw points as circles (instead of rects) + kUsePath_PointFlag = 0x02, // draw points as stamps of the returned path + kUseClip_PointFlag = 0x04, // apply 'fClipRect' before drawing the points + }; + + uint32_t fFlags; // flags that impact the drawing of the points + SkPoint* fPoints; // the center point of each generated point + int fNumPoints; // number of points in fPoints + SkVector fSize; // the size to draw the points + SkRect fClipRect; // clip required to draw the points (if kUseClip is set) + SkPath fPath; // 'stamp' to be used at each point (if kUsePath is set) + + SkPath fFirst; // If not empty, contains geometry for first point + SkPath fLast; // If not empty, contains geometry for last point + }; + + /** + * Does applying this path effect to 'src' yield a set of points? If so, + * optionally return the points in 'results'. + */ + bool asPoints(PointData* results, const SkPath& src, + const SkStrokeRec&, const SkMatrix&, + const SkRect* cullR) const; + + /** + * If the PathEffect can be represented as a dash pattern, asADash will return kDash_DashType + * and None otherwise. If a non NULL info is passed in, the various DashInfo will be filled + * in if the PathEffect can be a dash pattern. If passed in info has an fCount equal or + * greater to that of the effect, it will memcpy the values of the dash intervals into the + * info. Thus the general approach will be call asADash once with default info to get DashType + * and fCount. If effect can be represented as a dash pattern, allocate space for the intervals + * in info, then call asADash again with the same info and the intervals will get copied in. + */ + + SkFlattenable::Type getFlattenableType() const override { + return kSkPathEffect_Type; + } + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr) { + return sk_sp(static_cast( + SkFlattenable::Deserialize( + kSkPathEffect_Type, data, size, procs).release())); + } + + /** + * Filter the input path. + * + * The CTM parameter is provided for path effects that can use the information. + * The output of path effects must always be in the original (input) coordinate system, + * regardless of whether the path effect uses the CTM or not. + */ + virtual bool onFilterPath(SkPath*, const SkPath&, SkStrokeRec*, const SkRect*, + const SkMatrix& /* ctm */) const = 0; + + /** Path effects *requiring* a valid CTM should override to return true. */ + virtual bool onNeedsCTM() const { return false; } + + virtual bool onAsPoints(PointData*, const SkPath&, const SkStrokeRec&, const SkMatrix&, + const SkRect*) const { + return false; + } + virtual DashType onAsADash(DashInfo*) const { + return kNone_DashType; + } + + + // Compute a conservative bounds for its effect, given the bounds of the path. 'bounds' is + // both the input and output; if false is returned, fast bounds could not be calculated and + // 'bounds' is undefined. + // + // If 'bounds' is null, performs a dry-run determining if bounds could be computed. + virtual bool computeFastBounds(SkRect* bounds) const = 0; + + static void RegisterFlattenables(); + +private: + using INHERITED = SkPathEffect; +}; + +//////////////////////////////////////////////////////////////////////////////////////////////// + +static inline SkPathEffectBase* as_PEB(SkPathEffect* effect) { + return static_cast(effect); +} + +static inline const SkPathEffectBase* as_PEB(const SkPathEffect* effect) { + return static_cast(effect); +} + +static inline const SkPathEffectBase* as_PEB(const sk_sp& effect) { + return static_cast(effect.get()); +} + +static inline sk_sp as_PEB_sp(sk_sp effect) { + return sk_sp(static_cast(effect.release())); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkPathMakers.h b/gfx/skia/skia/src/core/SkPathMakers.h new file mode 100644 index 0000000000..8e668e5378 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathMakers.h @@ -0,0 +1,88 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathMakers_DEFINED +#define SkPathMakers_DEFINED + +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRRect.h" + +template class SkPath_PointIterator { +public: + SkPath_PointIterator(SkPathDirection dir, unsigned startIndex) + : fCurrent(startIndex % N) + , fAdvance(dir == SkPathDirection::kCW ? 1 : N - 1) { } + + const SkPoint& current() const { + SkASSERT(fCurrent < N); + return fPts[fCurrent]; + } + + const SkPoint& next() { + fCurrent = (fCurrent + fAdvance) % N; + return this->current(); + } + + protected: + SkPoint fPts[N]; + + private: + unsigned fCurrent; + unsigned fAdvance; +}; + +class SkPath_RectPointIterator : public SkPath_PointIterator<4> { +public: + SkPath_RectPointIterator(const SkRect& rect, SkPathDirection dir, unsigned startIndex) + : SkPath_PointIterator(dir, startIndex) { + + fPts[0] = SkPoint::Make(rect.fLeft, rect.fTop); + fPts[1] = SkPoint::Make(rect.fRight, rect.fTop); + fPts[2] = SkPoint::Make(rect.fRight, rect.fBottom); + fPts[3] = SkPoint::Make(rect.fLeft, rect.fBottom); + } +}; + +class SkPath_OvalPointIterator : public SkPath_PointIterator<4> { +public: + SkPath_OvalPointIterator(const SkRect& oval, SkPathDirection dir, unsigned startIndex) + : SkPath_PointIterator(dir, startIndex) { + + const SkScalar cx = oval.centerX(); + const SkScalar cy = oval.centerY(); + + fPts[0] = SkPoint::Make(cx, oval.fTop); + fPts[1] = SkPoint::Make(oval.fRight, cy); + fPts[2] = SkPoint::Make(cx, oval.fBottom); + fPts[3] = SkPoint::Make(oval.fLeft, cy); + } +}; + +class SkPath_RRectPointIterator : public SkPath_PointIterator<8> { +public: + SkPath_RRectPointIterator(const SkRRect& rrect, SkPathDirection dir, unsigned startIndex) + : SkPath_PointIterator(dir, startIndex) { + + const SkRect& bounds = rrect.getBounds(); + const SkScalar L = bounds.fLeft; + const SkScalar T = bounds.fTop; + const SkScalar R = bounds.fRight; + const SkScalar B = bounds.fBottom; + + fPts[0] = SkPoint::Make(L + rrect.radii(SkRRect::kUpperLeft_Corner).fX, T); + fPts[1] = SkPoint::Make(R - rrect.radii(SkRRect::kUpperRight_Corner).fX, T); + fPts[2] = SkPoint::Make(R, T + rrect.radii(SkRRect::kUpperRight_Corner).fY); + fPts[3] = SkPoint::Make(R, B - rrect.radii(SkRRect::kLowerRight_Corner).fY); + fPts[4] = SkPoint::Make(R - rrect.radii(SkRRect::kLowerRight_Corner).fX, B); + fPts[5] = SkPoint::Make(L + rrect.radii(SkRRect::kLowerLeft_Corner).fX, B); + fPts[6] = SkPoint::Make(L, B - rrect.radii(SkRRect::kLowerLeft_Corner).fY); + fPts[7] = SkPoint::Make(L, T + rrect.radii(SkRRect::kUpperLeft_Corner).fY); + } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPathMeasure.cpp b/gfx/skia/skia/src/core/SkPathMeasure.cpp new file mode 100644 index 0000000000..445e6a12ba --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathMeasure.cpp @@ -0,0 +1,53 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkContourMeasure.h" +#include "include/core/SkPathMeasure.h" + +SkPathMeasure::SkPathMeasure() {} + +SkPathMeasure::SkPathMeasure(const SkPath& path, bool forceClosed, SkScalar resScale) + : fIter(path, forceClosed, resScale) +{ + fContour = fIter.next(); +} + +SkPathMeasure::~SkPathMeasure() {} + +void SkPathMeasure::setPath(const SkPath* path, bool forceClosed) { + fIter.reset(path ? *path : SkPath(), forceClosed); + fContour = fIter.next(); +} + +SkScalar SkPathMeasure::getLength() { + return fContour ? fContour->length() : 0; +} + +bool SkPathMeasure::getPosTan(SkScalar distance, SkPoint* position, SkVector* tangent) { + return fContour && fContour->getPosTan(distance, position, tangent); +} + +bool SkPathMeasure::getMatrix(SkScalar distance, SkMatrix* matrix, MatrixFlags flags) { + return fContour && fContour->getMatrix(distance, matrix, (SkContourMeasure::MatrixFlags)flags); +} + +bool SkPathMeasure::getSegment(SkScalar startD, SkScalar stopD, SkPath* dst, bool startWithMoveTo) { + return fContour && fContour->getSegment(startD, stopD, dst, startWithMoveTo); +} + +bool SkPathMeasure::isClosed() { + return fContour && fContour->isClosed(); +} + +bool SkPathMeasure::nextContour() { + fContour = fIter.next(); + return !!fContour; +} + +#ifdef SK_DEBUG +void SkPathMeasure::dump() {} +#endif diff --git a/gfx/skia/skia/src/core/SkPathMeasurePriv.h b/gfx/skia/skia/src/core/SkPathMeasurePriv.h new file mode 100644 index 0000000000..dbad22b622 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathMeasurePriv.h @@ -0,0 +1,29 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathMeasurePriv_DEFINED +#define SkPathMeasurePriv_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "src/core/SkGeometry.h" + +// Used in the Segment struct defined in SkPathMeasure.h +// It is used as a 2-bit field so if you add to this +// you must increase the size of the bitfield there. +enum SkSegType { + kLine_SegType, + kQuad_SegType, + kCubic_SegType, + kConic_SegType, +}; + + +void SkPathMeasure_segTo(const SkPoint pts[], unsigned segType, + SkScalar startT, SkScalar stopT, SkPath* dst); + +#endif // SkPathMeasurePriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkPathPriv.h b/gfx/skia/skia/src/core/SkPathPriv.h new file mode 100644 index 0000000000..f1721a77ef --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathPriv.h @@ -0,0 +1,529 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathPriv_DEFINED +#define SkPathPriv_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkPathBuilder.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/SkIDChangeListener.h" +#include "include/private/SkPathRef.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkPathEnums.h" + +#include +#include +#include + +class SkMatrix; +class SkRRect; + +static_assert(0 == static_cast(SkPathFillType::kWinding), "fill_type_mismatch"); +static_assert(1 == static_cast(SkPathFillType::kEvenOdd), "fill_type_mismatch"); +static_assert(2 == static_cast(SkPathFillType::kInverseWinding), "fill_type_mismatch"); +static_assert(3 == static_cast(SkPathFillType::kInverseEvenOdd), "fill_type_mismatch"); + +class SkPathPriv { +public: + // skbug.com/9906: Not a perfect solution for W plane clipping, but 1/16384 is a + // reasonable limit (roughly 5e-5) + inline static constexpr SkScalar kW0PlaneDistance = 1.f / (1 << 14); + + static SkPathFirstDirection AsFirstDirection(SkPathDirection dir) { + // since we agree numerically for the values in Direction, we can just cast. + return (SkPathFirstDirection)dir; + } + + /** + * Return the opposite of the specified direction. kUnknown is its own + * opposite. + */ + static SkPathFirstDirection OppositeFirstDirection(SkPathFirstDirection dir) { + static const SkPathFirstDirection gOppositeDir[] = { + SkPathFirstDirection::kCCW, SkPathFirstDirection::kCW, SkPathFirstDirection::kUnknown, + }; + return gOppositeDir[(unsigned)dir]; + } + + /** + * Tries to compute the direction of the outer-most non-degenerate + * contour. If it can be computed, return that direction. If it cannot be determined, + * or the contour is known to be convex, return kUnknown. If the direction was determined, + * it is cached to make subsequent calls return quickly. + */ + static SkPathFirstDirection ComputeFirstDirection(const SkPath&); + + static bool IsClosedSingleContour(const SkPath& path) { + int verbCount = path.countVerbs(); + if (verbCount == 0) + return false; + int moveCount = 0; + auto verbs = path.fPathRef->verbsBegin(); + for (int i = 0; i < verbCount; i++) { + switch (verbs[i]) { + case SkPath::Verb::kMove_Verb: + moveCount += 1; + if (moveCount > 1) { + return false; + } + break; + case SkPath::Verb::kClose_Verb: + if (i == verbCount - 1) { + return true; + } + return false; + default: break; + } + } + return false; + } + + // In some scenarios (e.g. fill or convexity checking all but the last leading move to are + // irrelevant to behavior). SkPath::injectMoveToIfNeeded should ensure that this is always at + // least 1. + static int LeadingMoveToCount(const SkPath& path) { + int verbCount = path.countVerbs(); + auto verbs = path.fPathRef->verbsBegin(); + for (int i = 0; i < verbCount; i++) { + if (verbs[i] != SkPath::Verb::kMove_Verb) { + return i; + } + } + return verbCount; // path is all move verbs + } + + static void AddGenIDChangeListener(const SkPath& path, sk_sp listener) { + path.fPathRef->addGenIDChangeListener(std::move(listener)); + } + + /** + * This returns true for a rect that has a move followed by 3 or 4 lines and a close. If + * 'isSimpleFill' is true, an uncloseed rect will also be accepted as long as it starts and + * ends at the same corner. This does not permit degenerate line or point rectangles. + */ + static bool IsSimpleRect(const SkPath& path, bool isSimpleFill, SkRect* rect, + SkPathDirection* direction, unsigned* start); + + /** + * Creates a path from arc params using the semantics of SkCanvas::drawArc. This function + * assumes empty ovals and zero sweeps have already been filtered out. + */ + static void CreateDrawArcPath(SkPath* path, const SkRect& oval, SkScalar startAngle, + SkScalar sweepAngle, bool useCenter, bool isFillNoPathEffect); + + /** + * Determines whether an arc produced by CreateDrawArcPath will be convex. Assumes a non-empty + * oval. + */ + static bool DrawArcIsConvex(SkScalar sweepAngle, bool useCenter, bool isFillNoPathEffect); + + static void ShrinkToFit(SkPath* path) { + path->shrinkToFit(); + } + + /** + * Returns a C++11-iterable object that traverses a path's verbs in order. e.g: + * + * for (SkPath::Verb verb : SkPathPriv::Verbs(path)) { + * ... + * } + */ + struct Verbs { + public: + Verbs(const SkPath& path) : fPathRef(path.fPathRef.get()) {} + struct Iter { + void operator++() { fVerb++; } + bool operator!=(const Iter& b) { return fVerb != b.fVerb; } + SkPath::Verb operator*() { return static_cast(*fVerb); } + const uint8_t* fVerb; + }; + Iter begin() { return Iter{fPathRef->verbsBegin()}; } + Iter end() { return Iter{fPathRef->verbsEnd()}; } + private: + Verbs(const Verbs&) = delete; + Verbs& operator=(const Verbs&) = delete; + SkPathRef* fPathRef; + }; + + /** + * Iterates through a raw range of path verbs, points, and conics. All values are returned + * unaltered. + * + * NOTE: This class's definition will be moved into SkPathPriv once RangeIter is removed. + */ + using RangeIter = SkPath::RangeIter; + + /** + * Iterable object for traversing verbs, points, and conic weights in a path: + * + * for (auto [verb, pts, weights] : SkPathPriv::Iterate(skPath)) { + * ... + * } + */ + struct Iterate { + public: + Iterate(const SkPath& path) + : Iterate(path.fPathRef->verbsBegin(), + // Don't allow iteration through non-finite points. + (!path.isFinite()) ? path.fPathRef->verbsBegin() + : path.fPathRef->verbsEnd(), + path.fPathRef->points(), path.fPathRef->conicWeights()) { + } + Iterate(const uint8_t* verbsBegin, const uint8_t* verbsEnd, const SkPoint* points, + const SkScalar* weights) + : fVerbsBegin(verbsBegin), fVerbsEnd(verbsEnd), fPoints(points), fWeights(weights) { + } + SkPath::RangeIter begin() { return {fVerbsBegin, fPoints, fWeights}; } + SkPath::RangeIter end() { return {fVerbsEnd, nullptr, nullptr}; } + private: + const uint8_t* fVerbsBegin; + const uint8_t* fVerbsEnd; + const SkPoint* fPoints; + const SkScalar* fWeights; + }; + + /** + * Returns a pointer to the verb data. + */ + static const uint8_t* VerbData(const SkPath& path) { + return path.fPathRef->verbsBegin(); + } + + /** Returns a raw pointer to the path points */ + static const SkPoint* PointData(const SkPath& path) { + return path.fPathRef->points(); + } + + /** Returns the number of conic weights in the path */ + static int ConicWeightCnt(const SkPath& path) { + return path.fPathRef->countWeights(); + } + + /** Returns a raw pointer to the path conic weights. */ + static const SkScalar* ConicWeightData(const SkPath& path) { + return path.fPathRef->conicWeights(); + } + + /** Returns true if the underlying SkPathRef has one single owner. */ + static bool TestingOnly_unique(const SkPath& path) { + return path.fPathRef->unique(); + } + + // Won't be needed once we can make path's immutable (with their bounds always computed) + static bool HasComputedBounds(const SkPath& path) { + return path.hasComputedBounds(); + } + + /** Returns true if constructed by addCircle(), addOval(); and in some cases, + addRoundRect(), addRRect(). SkPath constructed with conicTo() or rConicTo() will not + return true though SkPath draws oval. + + rect receives bounds of oval. + dir receives SkPathDirection of oval: kCW_Direction if clockwise, kCCW_Direction if + counterclockwise. + start receives start of oval: 0 for top, 1 for right, 2 for bottom, 3 for left. + + rect, dir, and start are unmodified if oval is not found. + + Triggers performance optimizations on some GPU surface implementations. + + @param rect storage for bounding SkRect of oval; may be nullptr + @param dir storage for SkPathDirection; may be nullptr + @param start storage for start of oval; may be nullptr + @return true if SkPath was constructed by method that reduces to oval + */ + static bool IsOval(const SkPath& path, SkRect* rect, SkPathDirection* dir, unsigned* start) { + bool isCCW = false; + bool result = path.fPathRef->isOval(rect, &isCCW, start); + if (dir && result) { + *dir = isCCW ? SkPathDirection::kCCW : SkPathDirection::kCW; + } + return result; + } + + /** Returns true if constructed by addRoundRect(), addRRect(); and if construction + is not empty, not SkRect, and not oval. SkPath constructed with other calls + will not return true though SkPath draws SkRRect. + + rrect receives bounds of SkRRect. + dir receives SkPathDirection of oval: kCW_Direction if clockwise, kCCW_Direction if + counterclockwise. + start receives start of SkRRect: 0 for top, 1 for right, 2 for bottom, 3 for left. + + rrect, dir, and start are unmodified if SkRRect is not found. + + Triggers performance optimizations on some GPU surface implementations. + + @param rrect storage for bounding SkRect of SkRRect; may be nullptr + @param dir storage for SkPathDirection; may be nullptr + @param start storage for start of SkRRect; may be nullptr + @return true if SkPath contains only SkRRect + */ + static bool IsRRect(const SkPath& path, SkRRect* rrect, SkPathDirection* dir, + unsigned* start) { + bool isCCW = false; + bool result = path.fPathRef->isRRect(rrect, &isCCW, start); + if (dir && result) { + *dir = isCCW ? SkPathDirection::kCCW : SkPathDirection::kCW; + } + return result; + } + + /** + * Sometimes in the drawing pipeline, we have to perform math on path coordinates, even after + * the path is in device-coordinates. Tessellation and clipping are two examples. Usually this + * is pretty modest, but it can involve subtracting/adding coordinates, or multiplying by + * small constants (e.g. 2,3,4). To try to preflight issues where these optionations could turn + * finite path values into infinities (or NaNs), we allow the upper drawing code to reject + * the path if its bounds (in device coordinates) is too close to max float. + */ + static bool TooBigForMath(const SkRect& bounds) { + // This value is just a guess. smaller is safer, but we don't want to reject largish paths + // that we don't have to. + constexpr SkScalar scale_down_to_allow_for_small_multiplies = 0.25f; + constexpr SkScalar max = SK_ScalarMax * scale_down_to_allow_for_small_multiplies; + + // use ! expression so we return true if bounds contains NaN + return !(bounds.fLeft >= -max && bounds.fTop >= -max && + bounds.fRight <= max && bounds.fBottom <= max); + } + static bool TooBigForMath(const SkPath& path) { + return TooBigForMath(path.getBounds()); + } + + // Returns number of valid points for each SkPath::Iter verb + static int PtsInIter(unsigned verb) { + static const uint8_t gPtsInVerb[] = { + 1, // kMove pts[0] + 2, // kLine pts[0..1] + 3, // kQuad pts[0..2] + 3, // kConic pts[0..2] + 4, // kCubic pts[0..3] + 0, // kClose + 0 // kDone + }; + + SkASSERT(verb < std::size(gPtsInVerb)); + return gPtsInVerb[verb]; + } + + // Returns number of valid points for each verb, not including the "starter" + // point that the Iterator adds for line/quad/conic/cubic + static int PtsInVerb(unsigned verb) { + static const uint8_t gPtsInVerb[] = { + 1, // kMove pts[0] + 1, // kLine pts[0..1] + 2, // kQuad pts[0..2] + 2, // kConic pts[0..2] + 3, // kCubic pts[0..3] + 0, // kClose + 0 // kDone + }; + + SkASSERT(verb < std::size(gPtsInVerb)); + return gPtsInVerb[verb]; + } + + static bool IsAxisAligned(const SkPath& path); + + static bool AllPointsEq(const SkPoint pts[], int count) { + for (int i = 1; i < count; ++i) { + if (pts[0] != pts[i]) { + return false; + } + } + return true; + } + + static int LastMoveToIndex(const SkPath& path) { return path.fLastMoveToIndex; } + + static bool IsRectContour(const SkPath&, bool allowPartial, int* currVerb, + const SkPoint** ptsPtr, bool* isClosed, SkPathDirection* direction, + SkRect* rect); + + /** Returns true if SkPath is equivalent to nested SkRect pair when filled. + If false, rect and dirs are unchanged. + If true, rect and dirs are written to if not nullptr: + setting rect[0] to outer SkRect, and rect[1] to inner SkRect; + setting dirs[0] to SkPathDirection of outer SkRect, and dirs[1] to SkPathDirection of + inner SkRect. + + @param rect storage for SkRect pair; may be nullptr + @param dirs storage for SkPathDirection pair; may be nullptr + @return true if SkPath contains nested SkRect pair + */ + static bool IsNestedFillRects(const SkPath&, SkRect rect[2], + SkPathDirection dirs[2] = nullptr); + + static bool IsInverseFillType(SkPathFillType fill) { + return (static_cast(fill) & 2) != 0; + } + + /** Returns equivalent SkPath::FillType representing SkPath fill inside its bounds. + . + + @param fill one of: kWinding_FillType, kEvenOdd_FillType, + kInverseWinding_FillType, kInverseEvenOdd_FillType + @return fill, or kWinding_FillType or kEvenOdd_FillType if fill is inverted + */ + static SkPathFillType ConvertToNonInverseFillType(SkPathFillType fill) { + return (SkPathFillType)(static_cast(fill) & 1); + } + + /** + * If needed (to not blow-up under a perspective matrix), clip the path, returning the + * answer in "result", and return true. + * + * Note result might be empty (if the path was completely clipped out). + * + * If no clipping is needed, returns false and "result" is left unchanged. + */ + static bool PerspectiveClip(const SkPath& src, const SkMatrix&, SkPath* result); + + /** + * Gets the number of GenIDChangeListeners. If another thread has access to this path then + * this may be stale before return and only indicates that the count was the return value + * at some point during the execution of the function. + */ + static int GenIDChangeListenersCount(const SkPath&); + + static void UpdatePathPoint(SkPath* path, int index, const SkPoint& pt) { + SkASSERT(index < path->countPoints()); + SkPathRef::Editor ed(&path->fPathRef); + ed.writablePoints()[index] = pt; + path->dirtyAfterEdit(); + } + + static SkPathConvexity GetConvexity(const SkPath& path) { + return path.getConvexity(); + } + static SkPathConvexity GetConvexityOrUnknown(const SkPath& path) { + return path.getConvexityOrUnknown(); + } + static void SetConvexity(const SkPath& path, SkPathConvexity c) { + path.setConvexity(c); + } + static void ForceComputeConvexity(const SkPath& path) { + path.setConvexity(SkPathConvexity::kUnknown); + (void)path.isConvex(); + } + + static void ReverseAddPath(SkPathBuilder* builder, const SkPath& reverseMe) { + builder->privateReverseAddPath(reverseMe); + } +}; + +// Lightweight variant of SkPath::Iter that only returns segments (e.g. lines/conics). +// Does not return kMove or kClose. +// Always "auto-closes" each contour. +// Roughly the same as SkPath::Iter(path, true), but does not return moves or closes +// +class SkPathEdgeIter { + const uint8_t* fVerbs; + const uint8_t* fVerbsStop; + const SkPoint* fPts; + const SkPoint* fMoveToPtr; + const SkScalar* fConicWeights; + SkPoint fScratch[2]; // for auto-close lines + bool fNeedsCloseLine; + bool fNextIsNewContour; + SkDEBUGCODE(bool fIsConic;) + + enum { + kIllegalEdgeValue = 99 + }; + +public: + SkPathEdgeIter(const SkPath& path); + + SkScalar conicWeight() const { + SkASSERT(fIsConic); + return *fConicWeights; + } + + enum class Edge { + kLine = SkPath::kLine_Verb, + kQuad = SkPath::kQuad_Verb, + kConic = SkPath::kConic_Verb, + kCubic = SkPath::kCubic_Verb, + }; + + static SkPath::Verb EdgeToVerb(Edge e) { + return SkPath::Verb(e); + } + + struct Result { + const SkPoint* fPts; // points for the segment, or null if done + Edge fEdge; + bool fIsNewContour; + + // Returns true when it holds an Edge, false when the path is done. + explicit operator bool() { return fPts != nullptr; } + }; + + Result next() { + auto closeline = [&]() { + fScratch[0] = fPts[-1]; + fScratch[1] = *fMoveToPtr; + fNeedsCloseLine = false; + fNextIsNewContour = true; + return Result{ fScratch, Edge::kLine, false }; + }; + + for (;;) { + SkASSERT(fVerbs <= fVerbsStop); + if (fVerbs == fVerbsStop) { + return fNeedsCloseLine + ? closeline() + : Result{ nullptr, Edge(kIllegalEdgeValue), false }; + } + + SkDEBUGCODE(fIsConic = false;) + + const auto v = *fVerbs++; + switch (v) { + case SkPath::kMove_Verb: { + if (fNeedsCloseLine) { + auto res = closeline(); + fMoveToPtr = fPts++; + return res; + } + fMoveToPtr = fPts++; + fNextIsNewContour = true; + } break; + case SkPath::kClose_Verb: + if (fNeedsCloseLine) return closeline(); + break; + default: { + // Actual edge. + const int pts_count = (v+2) / 2, + cws_count = (v & (v-1)) / 2; + SkASSERT(pts_count == SkPathPriv::PtsInIter(v) - 1); + + fNeedsCloseLine = true; + fPts += pts_count; + fConicWeights += cws_count; + + SkDEBUGCODE(fIsConic = (v == SkPath::kConic_Verb);) + SkASSERT(fIsConic == (cws_count > 0)); + + bool isNewContour = fNextIsNewContour; + fNextIsNewContour = false; + return { &fPts[-(pts_count + 1)], Edge(v), isNewContour }; + } + } + } + } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPathRef.cpp b/gfx/skia/skia/src/core/SkPathRef.cpp new file mode 100644 index 0000000000..0595a4bff5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathRef.cpp @@ -0,0 +1,689 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkPathRef.h" + +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkRRect.h" +#include "include/private/base/SkOnce.h" +#include "src/base/SkVx.h" + +#include + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + static constexpr int kPathRefGenIDBitCnt = 30; // leave room for the fill type (skbug.com/1762) +#else + static constexpr int kPathRefGenIDBitCnt = 32; +#endif + +////////////////////////////////////////////////////////////////////////////// +SkPathRef::Editor::Editor(sk_sp* pathRef, + int incReserveVerbs, + int incReservePoints) +{ + SkASSERT(incReserveVerbs >= 0); + SkASSERT(incReservePoints >= 0); + + if ((*pathRef)->unique()) { + (*pathRef)->incReserve(incReserveVerbs, incReservePoints); + } else { + SkPathRef* copy; + // No need to copy if the existing ref is the empty ref (because it doesn't contain + // anything). + if (!(*pathRef)->isInitialEmptyPathRef()) { + copy = new SkPathRef; + copy->copy(**pathRef, incReserveVerbs, incReservePoints); + } else { + // Size previously empty paths to exactly fit the supplied hints. The assumpion is + // the caller knows the exact size they want (as happens in chrome when deserializing + // paths). + copy = new SkPathRef(incReserveVerbs, incReservePoints); + } + pathRef->reset(copy); + } + fPathRef = pathRef->get(); + fPathRef->callGenIDChangeListeners(); + fPathRef->fGenerationID = 0; + fPathRef->fBoundsIsDirty = true; + SkDEBUGCODE(fPathRef->fEditorsAttached++;) +} + +////////////////////////////////////////////////////////////////////////////// + +size_t SkPathRef::approximateBytesUsed() const { + return sizeof(SkPathRef) + + fPoints .capacity() * sizeof(fPoints [0]) + + fVerbs .capacity() * sizeof(fVerbs [0]) + + fConicWeights.capacity() * sizeof(fConicWeights[0]); +} + +SkPathRef::~SkPathRef() { + // Deliberately don't validate() this path ref, otherwise there's no way + // to read one that's not valid and then free its memory without asserting. + SkDEBUGCODE(fGenerationID = 0xEEEEEEEE;) + SkDEBUGCODE(fEditorsAttached.store(0x7777777);) +} + +static SkPathRef* gEmpty = nullptr; + +SkPathRef* SkPathRef::CreateEmpty() { + static SkOnce once; + once([]{ + gEmpty = new SkPathRef; + gEmpty->computeBounds(); // Avoids races later to be the first to do this. + }); + return SkRef(gEmpty); +} + +static void transform_dir_and_start(const SkMatrix& matrix, bool isRRect, bool* isCCW, + unsigned* start) { + int inStart = *start; + int rm = 0; + if (isRRect) { + // Degenerate rrect indices to oval indices and remember the remainder. + // Ovals have one index per side whereas rrects have two. + rm = inStart & 0b1; + inStart /= 2; + } + // Is the antidiagonal non-zero (otherwise the diagonal is zero) + int antiDiag; + // Is the non-zero value in the top row (either kMScaleX or kMSkewX) negative + int topNeg; + // Are the two non-zero diagonal or antidiagonal values the same sign. + int sameSign; + if (matrix.get(SkMatrix::kMScaleX) != 0) { + antiDiag = 0b00; + if (matrix.get(SkMatrix::kMScaleX) > 0) { + topNeg = 0b00; + sameSign = matrix.get(SkMatrix::kMScaleY) > 0 ? 0b01 : 0b00; + } else { + topNeg = 0b10; + sameSign = matrix.get(SkMatrix::kMScaleY) > 0 ? 0b00 : 0b01; + } + } else { + antiDiag = 0b01; + if (matrix.get(SkMatrix::kMSkewX) > 0) { + topNeg = 0b00; + sameSign = matrix.get(SkMatrix::kMSkewY) > 0 ? 0b01 : 0b00; + } else { + topNeg = 0b10; + sameSign = matrix.get(SkMatrix::kMSkewY) > 0 ? 0b00 : 0b01; + } + } + if (sameSign != antiDiag) { + // This is a rotation (and maybe scale). The direction is unchanged. + // Trust me on the start computation (or draw yourself some pictures) + *start = (inStart + 4 - (topNeg | antiDiag)) % 4; + SkASSERT(*start < 4); + if (isRRect) { + *start = 2 * *start + rm; + } + } else { + // This is a mirror (and maybe scale). The direction is reversed. + *isCCW = !*isCCW; + // Trust me on the start computation (or draw yourself some pictures) + *start = (6 + (topNeg | antiDiag) - inStart) % 4; + SkASSERT(*start < 4); + if (isRRect) { + *start = 2 * *start + (rm ? 0 : 1); + } + } +} + +void SkPathRef::CreateTransformedCopy(sk_sp* dst, + const SkPathRef& src, + const SkMatrix& matrix) { + SkDEBUGCODE(src.validate();) + if (matrix.isIdentity()) { + if (dst->get() != &src) { + src.ref(); + dst->reset(const_cast(&src)); + SkDEBUGCODE((*dst)->validate();) + } + return; + } + + sk_sp srcKeepAlive; + if (!(*dst)->unique()) { + // If dst and src are the same then we are about to drop our only ref on the common path + // ref. Some other thread may have owned src when we checked unique() above but it may not + // continue to do so. Add another ref so we continue to be an owner until we're done. + if (dst->get() == &src) { + srcKeepAlive.reset(SkRef(&src)); + } + dst->reset(new SkPathRef); + } + + if (dst->get() != &src) { + (*dst)->fVerbs = src.fVerbs; + (*dst)->fConicWeights = src.fConicWeights; + (*dst)->callGenIDChangeListeners(); + (*dst)->fGenerationID = 0; // mark as dirty + // don't copy, just allocate the points + (*dst)->fPoints.resize(src.fPoints.size()); + } + matrix.mapPoints((*dst)->fPoints.begin(), src.fPoints.begin(), src.fPoints.size()); + + // Need to check this here in case (&src == dst) + bool canXformBounds = !src.fBoundsIsDirty && matrix.rectStaysRect() && src.countPoints() > 1; + + /* + * Here we optimize the bounds computation, by noting if the bounds are + * already known, and if so, we just transform those as well and mark + * them as "known", rather than force the transformed path to have to + * recompute them. + * + * Special gotchas if the path is effectively empty (<= 1 point) or + * if it is non-finite. In those cases bounds need to stay empty, + * regardless of the matrix. + */ + if (canXformBounds) { + (*dst)->fBoundsIsDirty = false; + if (src.fIsFinite) { + matrix.mapRect(&(*dst)->fBounds, src.fBounds); + if (!((*dst)->fIsFinite = (*dst)->fBounds.isFinite())) { + (*dst)->fBounds.setEmpty(); + } else if (src.countPoints() & 1) { + /* Matrix optimizations may cause the first point to use slightly different + * math for its transform, which can lead to it being outside the transformed + * bounds. Include it in the bounds just in case. + */ + SkPoint p = (*dst)->fPoints[0]; + SkRect& r = (*dst)->fBounds; + r.fLeft = std::min(r.fLeft, p.fX); + r.fTop = std::min(r.fTop, p.fY); + r.fRight = std::max(r.fRight, p.fX); + r.fBottom = std::max(r.fBottom, p.fY); + } + } else { + (*dst)->fIsFinite = false; + (*dst)->fBounds.setEmpty(); + } + } else { + (*dst)->fBoundsIsDirty = true; + } + + (*dst)->fSegmentMask = src.fSegmentMask; + + // It's an oval only if it stays a rect. + bool rectStaysRect = matrix.rectStaysRect(); + (*dst)->fIsOval = src.fIsOval && rectStaysRect; + (*dst)->fIsRRect = src.fIsRRect && rectStaysRect; + if ((*dst)->fIsOval || (*dst)->fIsRRect) { + unsigned start = src.fRRectOrOvalStartIdx; + bool isCCW = SkToBool(src.fRRectOrOvalIsCCW); + transform_dir_and_start(matrix, (*dst)->fIsRRect, &isCCW, &start); + (*dst)->fRRectOrOvalIsCCW = isCCW; + (*dst)->fRRectOrOvalStartIdx = start; + } + + if (dst->get() == &src) { + (*dst)->callGenIDChangeListeners(); + (*dst)->fGenerationID = 0; + } + + SkDEBUGCODE((*dst)->validate();) +} + +void SkPathRef::Rewind(sk_sp* pathRef) { + if ((*pathRef)->unique()) { + SkDEBUGCODE((*pathRef)->validate();) + (*pathRef)->callGenIDChangeListeners(); + (*pathRef)->fBoundsIsDirty = true; // this also invalidates fIsFinite + (*pathRef)->fGenerationID = 0; + (*pathRef)->fPoints.clear(); + (*pathRef)->fVerbs.clear(); + (*pathRef)->fConicWeights.clear(); + (*pathRef)->fSegmentMask = 0; + (*pathRef)->fIsOval = false; + (*pathRef)->fIsRRect = false; + SkDEBUGCODE((*pathRef)->validate();) + } else { + int oldVCnt = (*pathRef)->countVerbs(); + int oldPCnt = (*pathRef)->countPoints(); + pathRef->reset(new SkPathRef); + (*pathRef)->resetToSize(0, 0, 0, oldVCnt, oldPCnt); + } +} + +bool SkPathRef::operator== (const SkPathRef& ref) const { + SkDEBUGCODE(this->validate();) + SkDEBUGCODE(ref.validate();) + + // We explicitly check fSegmentMask as a quick-reject. We could skip it, + // since it is only a cache of info in the fVerbs, but its a fast way to + // notice a difference + if (fSegmentMask != ref.fSegmentMask) { + return false; + } + + bool genIDMatch = fGenerationID && fGenerationID == ref.fGenerationID; +#ifdef SK_RELEASE + if (genIDMatch) { + return true; + } +#endif + if (fPoints != ref.fPoints || fConicWeights != ref.fConicWeights || fVerbs != ref.fVerbs) { + SkASSERT(!genIDMatch); + return false; + } + if (ref.fVerbs.empty()) { + SkASSERT(ref.fPoints.empty()); + } + return true; +} + +void SkPathRef::copy(const SkPathRef& ref, + int additionalReserveVerbs, + int additionalReservePoints) { + SkDEBUGCODE(this->validate();) + this->resetToSize(ref.fVerbs.size(), ref.fPoints.size(), ref.fConicWeights.size(), + additionalReserveVerbs, additionalReservePoints); + fVerbs = ref.fVerbs; + fPoints = ref.fPoints; + fConicWeights = ref.fConicWeights; + fBoundsIsDirty = ref.fBoundsIsDirty; + if (!fBoundsIsDirty) { + fBounds = ref.fBounds; + fIsFinite = ref.fIsFinite; + } + fSegmentMask = ref.fSegmentMask; + fIsOval = ref.fIsOval; + fIsRRect = ref.fIsRRect; + fRRectOrOvalIsCCW = ref.fRRectOrOvalIsCCW; + fRRectOrOvalStartIdx = ref.fRRectOrOvalStartIdx; + SkDEBUGCODE(this->validate();) +} + +void SkPathRef::interpolate(const SkPathRef& ending, SkScalar weight, SkPathRef* out) const { + const SkScalar* inValues = &ending.getPoints()->fX; + SkScalar* outValues = &out->getWritablePoints()->fX; + int count = out->countPoints() * 2; + for (int index = 0; index < count; ++index) { + outValues[index] = outValues[index] * weight + inValues[index] * (1 - weight); + } + out->fBoundsIsDirty = true; + out->fIsOval = false; + out->fIsRRect = false; +} + +std::tuple SkPathRef::growForVerbsInPath(const SkPathRef& path) { + SkDEBUGCODE(this->validate();) + + fSegmentMask |= path.fSegmentMask; + fBoundsIsDirty = true; // this also invalidates fIsFinite + fIsOval = false; + fIsRRect = false; + + if (int numVerbs = path.countVerbs()) { + memcpy(fVerbs.push_back_n(numVerbs), path.fVerbs.begin(), numVerbs * sizeof(fVerbs[0])); + } + + SkPoint* pts = nullptr; + if (int numPts = path.countPoints()) { + pts = fPoints.push_back_n(numPts); + } + + SkScalar* weights = nullptr; + if (int numConics = path.countWeights()) { + weights = fConicWeights.push_back_n(numConics); + } + + SkDEBUGCODE(this->validate();) + return {pts, weights}; +} + +SkPoint* SkPathRef::growForRepeatedVerb(int /*SkPath::Verb*/ verb, + int numVbs, + SkScalar** weights) { + SkDEBUGCODE(this->validate();) + int pCnt; + switch (verb) { + case SkPath::kMove_Verb: + pCnt = numVbs; + break; + case SkPath::kLine_Verb: + fSegmentMask |= SkPath::kLine_SegmentMask; + pCnt = numVbs; + break; + case SkPath::kQuad_Verb: + fSegmentMask |= SkPath::kQuad_SegmentMask; + pCnt = 2 * numVbs; + break; + case SkPath::kConic_Verb: + fSegmentMask |= SkPath::kConic_SegmentMask; + pCnt = 2 * numVbs; + break; + case SkPath::kCubic_Verb: + fSegmentMask |= SkPath::kCubic_SegmentMask; + pCnt = 3 * numVbs; + break; + case SkPath::kClose_Verb: + SkDEBUGFAIL("growForRepeatedVerb called for kClose_Verb"); + pCnt = 0; + break; + case SkPath::kDone_Verb: + SkDEBUGFAIL("growForRepeatedVerb called for kDone"); + pCnt = 0; + break; + default: + SkDEBUGFAIL("default should not be reached"); + pCnt = 0; + break; + } + + fBoundsIsDirty = true; // this also invalidates fIsFinite + fIsOval = false; + fIsRRect = false; + + memset(fVerbs.push_back_n(numVbs), verb, numVbs); + if (SkPath::kConic_Verb == verb) { + SkASSERT(weights); + *weights = fConicWeights.push_back_n(numVbs); + } + SkPoint* pts = fPoints.push_back_n(pCnt); + + SkDEBUGCODE(this->validate();) + return pts; +} + +SkPoint* SkPathRef::growForVerb(int /* SkPath::Verb*/ verb, SkScalar weight) { + SkDEBUGCODE(this->validate();) + int pCnt; + unsigned mask = 0; + switch (verb) { + case SkPath::kMove_Verb: + pCnt = 1; + break; + case SkPath::kLine_Verb: + mask = SkPath::kLine_SegmentMask; + pCnt = 1; + break; + case SkPath::kQuad_Verb: + mask = SkPath::kQuad_SegmentMask; + pCnt = 2; + break; + case SkPath::kConic_Verb: + mask = SkPath::kConic_SegmentMask; + pCnt = 2; + break; + case SkPath::kCubic_Verb: + mask = SkPath::kCubic_SegmentMask; + pCnt = 3; + break; + case SkPath::kClose_Verb: + pCnt = 0; + break; + case SkPath::kDone_Verb: + SkDEBUGFAIL("growForVerb called for kDone"); + pCnt = 0; + break; + default: + SkDEBUGFAIL("default is not reached"); + pCnt = 0; + break; + } + + fSegmentMask |= mask; + fBoundsIsDirty = true; // this also invalidates fIsFinite + fIsOval = false; + fIsRRect = false; + + fVerbs.push_back(verb); + if (SkPath::kConic_Verb == verb) { + fConicWeights.push_back(weight); + } + SkPoint* pts = fPoints.push_back_n(pCnt); + + SkDEBUGCODE(this->validate();) + return pts; +} + +uint32_t SkPathRef::genID(uint8_t fillType) const { + SkASSERT(fEditorsAttached.load() == 0); + static const uint32_t kMask = (static_cast(1) << kPathRefGenIDBitCnt) - 1; + + if (fGenerationID == 0) { + if (fPoints.empty() && fVerbs.empty()) { + fGenerationID = kEmptyGenID; + } else { + static std::atomic nextID{kEmptyGenID + 1}; + do { + fGenerationID = nextID.fetch_add(1, std::memory_order_relaxed) & kMask; + } while (fGenerationID == 0 || fGenerationID == kEmptyGenID); + } + } + #if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) + SkASSERT((unsigned)fillType < (1 << (32 - kPathRefGenIDBitCnt))); + fGenerationID |= static_cast(fillType) << kPathRefGenIDBitCnt; + #endif + return fGenerationID; +} + +void SkPathRef::addGenIDChangeListener(sk_sp listener) { + if (this == gEmpty) { + return; + } + fGenIDChangeListeners.add(std::move(listener)); +} + +int SkPathRef::genIDChangeListenerCount() { return fGenIDChangeListeners.count(); } + +// we need to be called *before* the genID gets changed or zerod +void SkPathRef::callGenIDChangeListeners() { + fGenIDChangeListeners.changed(); +} + +SkRRect SkPathRef::getRRect() const { + const SkRect& bounds = this->getBounds(); + SkVector radii[4] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}}; + Iter iter(*this); + SkPoint pts[4]; + uint8_t verb = iter.next(pts); + SkASSERT(SkPath::kMove_Verb == verb); + while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { + if (SkPath::kConic_Verb == verb) { + SkVector v1_0 = pts[1] - pts[0]; + SkVector v2_1 = pts[2] - pts[1]; + SkVector dxdy; + if (v1_0.fX) { + SkASSERT(!v2_1.fX && !v1_0.fY); + dxdy.set(SkScalarAbs(v1_0.fX), SkScalarAbs(v2_1.fY)); + } else if (!v1_0.fY) { + SkASSERT(!v2_1.fX || !v2_1.fY); + dxdy.set(SkScalarAbs(v2_1.fX), SkScalarAbs(v2_1.fY)); + } else { + SkASSERT(!v2_1.fY); + dxdy.set(SkScalarAbs(v2_1.fX), SkScalarAbs(v1_0.fY)); + } + SkRRect::Corner corner = + pts[1].fX == bounds.fLeft ? + pts[1].fY == bounds.fTop ? + SkRRect::kUpperLeft_Corner : SkRRect::kLowerLeft_Corner : + pts[1].fY == bounds.fTop ? + SkRRect::kUpperRight_Corner : SkRRect::kLowerRight_Corner; + SkASSERT(!radii[corner].fX && !radii[corner].fY); + radii[corner] = dxdy; + } else { + SkASSERT((verb == SkPath::kLine_Verb + && (!(pts[1].fX - pts[0].fX) || !(pts[1].fY - pts[0].fY))) + || verb == SkPath::kClose_Verb); + } + } + SkRRect rrect; + rrect.setRectRadii(bounds, radii); + return rrect; +} + +bool SkPathRef::isRRect(SkRRect* rrect, bool* isCCW, unsigned* start) const { + if (fIsRRect) { + if (rrect) { + *rrect = this->getRRect(); + } + if (isCCW) { + *isCCW = SkToBool(fRRectOrOvalIsCCW); + } + if (start) { + *start = fRRectOrOvalStartIdx; + } + } + return SkToBool(fIsRRect); + } + +/////////////////////////////////////////////////////////////////////////////// + +SkPathRef::Iter::Iter() { +#ifdef SK_DEBUG + fPts = nullptr; + fConicWeights = nullptr; +#endif + // need to init enough to make next() harmlessly return kDone_Verb + fVerbs = nullptr; + fVerbStop = nullptr; +} + +SkPathRef::Iter::Iter(const SkPathRef& path) { + this->setPathRef(path); +} + +void SkPathRef::Iter::setPathRef(const SkPathRef& path) { + fPts = path.points(); + fVerbs = path.verbsBegin(); + fVerbStop = path.verbsEnd(); + fConicWeights = path.conicWeights(); + if (fConicWeights) { + fConicWeights -= 1; // begin one behind + } + + // Don't allow iteration through non-finite points. + if (!path.isFinite()) { + fVerbStop = fVerbs; + } +} + +uint8_t SkPathRef::Iter::next(SkPoint pts[4]) { + SkASSERT(pts); + + SkDEBUGCODE(unsigned peekResult = this->peek();) + + if (fVerbs == fVerbStop) { + SkASSERT(peekResult == SkPath::kDone_Verb); + return (uint8_t) SkPath::kDone_Verb; + } + + // fVerbs points one beyond next verb so decrement first. + unsigned verb = *fVerbs++; + const SkPoint* srcPts = fPts; + + switch (verb) { + case SkPath::kMove_Verb: + pts[0] = srcPts[0]; + srcPts += 1; + break; + case SkPath::kLine_Verb: + pts[0] = srcPts[-1]; + pts[1] = srcPts[0]; + srcPts += 1; + break; + case SkPath::kConic_Verb: + fConicWeights += 1; + [[fallthrough]]; + case SkPath::kQuad_Verb: + pts[0] = srcPts[-1]; + pts[1] = srcPts[0]; + pts[2] = srcPts[1]; + srcPts += 2; + break; + case SkPath::kCubic_Verb: + pts[0] = srcPts[-1]; + pts[1] = srcPts[0]; + pts[2] = srcPts[1]; + pts[3] = srcPts[2]; + srcPts += 3; + break; + case SkPath::kClose_Verb: + break; + case SkPath::kDone_Verb: + SkASSERT(fVerbs == fVerbStop); + break; + } + fPts = srcPts; + SkASSERT(peekResult == verb); + return (uint8_t) verb; +} + +uint8_t SkPathRef::Iter::peek() const { + return fVerbs < fVerbStop ? *fVerbs : (uint8_t) SkPath::kDone_Verb; +} + + +bool SkPathRef::isValid() const { + if (fIsOval || fIsRRect) { + // Currently we don't allow both of these to be set, even though ovals are ro + if (fIsOval == fIsRRect) { + return false; + } + if (fIsOval) { + if (fRRectOrOvalStartIdx >= 4) { + return false; + } + } else { + if (fRRectOrOvalStartIdx >= 8) { + return false; + } + } + } + + if (!fBoundsIsDirty && !fBounds.isEmpty()) { + bool isFinite = true; + auto leftTop = skvx::float2(fBounds.fLeft, fBounds.fTop); + auto rightBot = skvx::float2(fBounds.fRight, fBounds.fBottom); + for (int i = 0; i < fPoints.size(); ++i) { + auto point = skvx::float2(fPoints[i].fX, fPoints[i].fY); +#ifdef SK_DEBUG + if (fPoints[i].isFinite() && (any(point < leftTop)|| any(point > rightBot))) { + SkDebugf("bad SkPathRef bounds: %g %g %g %g\n", + fBounds.fLeft, fBounds.fTop, fBounds.fRight, fBounds.fBottom); + for (int j = 0; j < fPoints.size(); ++j) { + if (i == j) { + SkDebugf("*** bounds do not contain: "); + } + SkDebugf("%g %g\n", fPoints[j].fX, fPoints[j].fY); + } + return false; + } +#endif + + if (fPoints[i].isFinite() && any(point < leftTop) && !any(point > rightBot)) + return false; + if (!fPoints[i].isFinite()) { + isFinite = false; + } + } + if (SkToBool(fIsFinite) != isFinite) { + return false; + } + } + return true; +} + +void SkPathRef::reset() { + commonReset(); + fPoints.clear(); + fVerbs.clear(); + fConicWeights.clear(); + SkDEBUGCODE(validate();) +} + +bool SkPathRef::dataMatchesVerbs() const { + const auto info = sk_path_analyze_verbs(fVerbs.begin(), fVerbs.size()); + return info.valid && + info.segmentMask == fSegmentMask && + info.points == fPoints.size() && + info.weights == fConicWeights.size(); +} diff --git a/gfx/skia/skia/src/core/SkPathUtils.cpp b/gfx/skia/skia/src/core/SkPathUtils.cpp new file mode 100644 index 0000000000..368292ca91 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPathUtils.cpp @@ -0,0 +1,87 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPathUtils.h" + +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkStrokeRec.h" +#include "src/core/SkMatrixPriv.h" + +namespace skpathutils { + +bool FillPathWithPaint(const SkPath& src, const SkPaint& paint, SkPath* dst) { + return skpathutils::FillPathWithPaint(src, paint, dst, nullptr, 1); +} + +bool FillPathWithPaint(const SkPath& src, const SkPaint& paint, SkPath* dst, + const SkRect* cullRect, SkScalar resScale) { + return skpathutils::FillPathWithPaint(src, paint, dst, cullRect, + SkMatrix::Scale(resScale, resScale)); +} + +bool FillPathWithPaint(const SkPath& src, const SkPaint& paint, SkPath* dst, + const SkRect* cullRect, const SkMatrix& ctm) { + if (!src.isFinite()) { + dst->reset(); + return false; + } + + const SkScalar resScale = SkMatrixPriv::ComputeResScaleForStroking(ctm); + SkStrokeRec rec(paint, resScale); + +#if defined(SK_BUILD_FOR_FUZZER) + // Prevent lines with small widths from timing out. + if (rec.getStyle() == SkStrokeRec::Style::kStroke_Style && rec.getWidth() < 0.001) { + return false; + } +#endif + + const SkPath* srcPtr = &src; + SkPath tmpPath; + + SkPathEffect* pe = paint.getPathEffect(); + if (pe && pe->filterPath(&tmpPath, src, &rec, cullRect, ctm)) { + srcPtr = &tmpPath; + } + + if (!rec.applyToPath(dst, *srcPtr)) { + if (srcPtr == &tmpPath) { + // If path's were copy-on-write, this trick would not be needed. + // As it is, we want to save making a deep-copy from tmpPath -> dst + // since we know we're just going to delete tmpPath when we return, + // so the swap saves that copy. + dst->swap(tmpPath); + } else { + *dst = *srcPtr; + } + } + + if (!dst->isFinite()) { + dst->reset(); + return false; + } + return !rec.isHairlineStyle(); +} + +} // namespace skpathutils + +SK_API bool FillPathWithPaint(const SkPath &src, const SkPaint &paint, SkPath *dst, + const SkRect *cullRect, SkScalar resScale) { + return skpathutils::FillPathWithPaint(src, paint, dst, cullRect, resScale); +} + +SK_API bool FillPathWithPaint(const SkPath &src, const SkPaint &paint, SkPath *dst, + const SkRect *cullRect, const SkMatrix &ctm) { + return skpathutils::FillPathWithPaint(src, paint, dst, cullRect, ctm); +} + +SK_API bool FillPathWithPaint(const SkPath &src, const SkPaint &paint, SkPath *dst) { + return skpathutils::FillPathWithPaint(src, paint, dst); +} diff --git a/gfx/skia/skia/src/core/SkPath_serial.cpp b/gfx/skia/skia/src/core/SkPath_serial.cpp new file mode 100644 index 0000000000..ffdc5b0e3d --- /dev/null +++ b/gfx/skia/skia/src/core/SkPath_serial.cpp @@ -0,0 +1,297 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkData.h" +#include "include/private/SkPathRef.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkPathEnums.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkBuffer.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkRRectPriv.h" + +#include + +enum SerializationOffsets { + kType_SerializationShift = 28, // requires 4 bits + kDirection_SerializationShift = 26, // requires 2 bits + kFillType_SerializationShift = 8, // requires 8 bits + // low-8-bits are version + kVersion_SerializationMask = 0xFF, +}; + +enum SerializationVersions { + // kPathPrivFirstDirection_Version = 1, + // kPathPrivLastMoveToIndex_Version = 2, + // kPathPrivTypeEnumVersion = 3, + kJustPublicData_Version = 4, // introduced Feb/2018 + kVerbsAreStoredForward_Version = 5, // introduced Sept/2019 + + kMin_Version = kJustPublicData_Version, + kCurrent_Version = kVerbsAreStoredForward_Version +}; + +enum SerializationType { + kGeneral = 0, + kRRect = 1 +}; + +static unsigned extract_version(uint32_t packed) { + return packed & kVersion_SerializationMask; +} + +static SkPathFillType extract_filltype(uint32_t packed) { + return static_cast((packed >> kFillType_SerializationShift) & 0x3); +} + +static SerializationType extract_serializationtype(uint32_t packed) { + return static_cast((packed >> kType_SerializationShift) & 0xF); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +size_t SkPath::writeToMemoryAsRRect(void* storage) const { + SkRect oval; + SkRRect rrect; + bool isCCW; + unsigned start; + if (fPathRef->isOval(&oval, &isCCW, &start)) { + rrect.setOval(oval); + // Convert to rrect start indices. + start *= 2; + } else if (!fPathRef->isRRect(&rrect, &isCCW, &start)) { + return 0; + } + + // packed header, rrect, start index. + const size_t sizeNeeded = sizeof(int32_t) + SkRRect::kSizeInMemory + sizeof(int32_t); + if (!storage) { + return sizeNeeded; + } + + int firstDir = isCCW ? (int)SkPathFirstDirection::kCCW : (int)SkPathFirstDirection::kCW; + int32_t packed = (fFillType << kFillType_SerializationShift) | + (firstDir << kDirection_SerializationShift) | + (SerializationType::kRRect << kType_SerializationShift) | + kCurrent_Version; + + SkWBuffer buffer(storage); + buffer.write32(packed); + SkRRectPriv::WriteToBuffer(rrect, &buffer); + buffer.write32(SkToS32(start)); + buffer.padToAlign4(); + SkASSERT(sizeNeeded == buffer.pos()); + return buffer.pos(); +} + +size_t SkPath::writeToMemory(void* storage) const { + SkDEBUGCODE(this->validate();) + + if (size_t bytes = this->writeToMemoryAsRRect(storage)) { + return bytes; + } + + int32_t packed = (fFillType << kFillType_SerializationShift) | + (SerializationType::kGeneral << kType_SerializationShift) | + kCurrent_Version; + + int32_t pts = fPathRef->countPoints(); + int32_t cnx = fPathRef->countWeights(); + int32_t vbs = fPathRef->countVerbs(); + + SkSafeMath safe; + size_t size = 4 * sizeof(int32_t); + size = safe.add(size, safe.mul(pts, sizeof(SkPoint))); + size = safe.add(size, safe.mul(cnx, sizeof(SkScalar))); + size = safe.add(size, safe.mul(vbs, sizeof(uint8_t))); + size = safe.alignUp(size, 4); + if (!safe) { + return 0; + } + if (!storage) { + return size; + } + + SkWBuffer buffer(storage); + buffer.write32(packed); + buffer.write32(pts); + buffer.write32(cnx); + buffer.write32(vbs); + buffer.write(fPathRef->points(), pts * sizeof(SkPoint)); + buffer.write(fPathRef->conicWeights(), cnx * sizeof(SkScalar)); + buffer.write(fPathRef->verbsBegin(), vbs * sizeof(uint8_t)); + buffer.padToAlign4(); + + SkASSERT(buffer.pos() == size); + return size; +} + +sk_sp SkPath::serialize() const { + size_t size = this->writeToMemory(nullptr); + sk_sp data = SkData::MakeUninitialized(size); + this->writeToMemory(data->writable_data()); + return data; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// +// reading + +size_t SkPath::readFromMemory(const void* storage, size_t length) { + SkRBuffer buffer(storage, length); + uint32_t packed; + if (!buffer.readU32(&packed)) { + return 0; + } + unsigned version = extract_version(packed); + if (version < kMin_Version || version > kCurrent_Version) { + return 0; + } + + if (version == kJustPublicData_Version || version == kVerbsAreStoredForward_Version) { + return this->readFromMemory_EQ4Or5(storage, length); + } + return 0; +} + +size_t SkPath::readAsRRect(const void* storage, size_t length) { + SkRBuffer buffer(storage, length); + uint32_t packed; + if (!buffer.readU32(&packed)) { + return 0; + } + + SkASSERT(extract_serializationtype(packed) == SerializationType::kRRect); + + uint8_t dir = (packed >> kDirection_SerializationShift) & 0x3; + SkPathFillType fillType = extract_filltype(packed); + + SkPathDirection rrectDir; + SkRRect rrect; + int32_t start; + switch (dir) { + case (int)SkPathFirstDirection::kCW: + rrectDir = SkPathDirection::kCW; + break; + case (int)SkPathFirstDirection::kCCW: + rrectDir = SkPathDirection::kCCW; + break; + default: + return 0; + } + if (!SkRRectPriv::ReadFromBuffer(&buffer, &rrect)) { + return 0; + } + if (!buffer.readS32(&start) || start != SkTPin(start, 0, 7)) { + return 0; + } + this->reset(); + this->addRRect(rrect, rrectDir, SkToUInt(start)); + this->setFillType(fillType); + buffer.skipToAlign4(); + return buffer.pos(); +} + +size_t SkPath::readFromMemory_EQ4Or5(const void* storage, size_t length) { + SkRBuffer buffer(storage, length); + uint32_t packed; + if (!buffer.readU32(&packed)) { + return 0; + } + + bool verbsAreReversed = true; + if (extract_version(packed) == kVerbsAreStoredForward_Version) { + verbsAreReversed = false; + } + + switch (extract_serializationtype(packed)) { + case SerializationType::kRRect: + return this->readAsRRect(storage, length); + case SerializationType::kGeneral: + break; // fall out + default: + return 0; + } + + int32_t pts, cnx, vbs; + if (!buffer.readS32(&pts) || !buffer.readS32(&cnx) || !buffer.readS32(&vbs)) { + return 0; + } + + const SkPoint* points = buffer.skipCount(pts); + const SkScalar* conics = buffer.skipCount(cnx); + const uint8_t* verbs = buffer.skipCount(vbs); + buffer.skipToAlign4(); + if (!buffer.isValid()) { + return 0; + } + SkASSERT(buffer.pos() <= length); + +#define CHECK_POINTS_CONICS(p, c) \ + do { \ + if (p && ((pts -= p) < 0)) { \ + return 0; \ + } \ + if (c && ((cnx -= c) < 0)) { \ + return 0; \ + } \ + } while (0) + + int verbsStep = 1; + if (verbsAreReversed) { + verbs += vbs - 1; + verbsStep = -1; + } + + SkPath tmp; + tmp.setFillType(extract_filltype(packed)); + { + // Reserve the exact number of verbs and points needed. + SkPathRef::Editor(&tmp.fPathRef, vbs, pts); + } + for (int i = 0; i < vbs; ++i) { + switch (*verbs) { + case kMove_Verb: + CHECK_POINTS_CONICS(1, 0); + tmp.moveTo(*points++); + break; + case kLine_Verb: + CHECK_POINTS_CONICS(1, 0); + tmp.lineTo(*points++); + break; + case kQuad_Verb: + CHECK_POINTS_CONICS(2, 0); + tmp.quadTo(points[0], points[1]); + points += 2; + break; + case kConic_Verb: + CHECK_POINTS_CONICS(2, 1); + tmp.conicTo(points[0], points[1], *conics++); + points += 2; + break; + case kCubic_Verb: + CHECK_POINTS_CONICS(3, 0); + tmp.cubicTo(points[0], points[1], points[2]); + points += 3; + break; + case kClose_Verb: + tmp.close(); + break; + default: + return 0; // bad verb + } + verbs += verbsStep; + } +#undef CHECK_POINTS_CONICS + if (pts || cnx) { + return 0; // leftover points and/or conics + } + + *this = std::move(tmp); + return buffer.pos(); +} diff --git a/gfx/skia/skia/src/core/SkPicture.cpp b/gfx/skia/skia/src/core/SkPicture.cpp new file mode 100644 index 0000000000..609943748d --- /dev/null +++ b/gfx/skia/skia/src/core/SkPicture.cpp @@ -0,0 +1,352 @@ +/* + * Copyright 2007 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPicture.h" + +#include "include/core/SkImageGenerator.h" +#include "include/core/SkPictureRecorder.h" +#include "include/core/SkSerialProcs.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkPictureData.h" +#include "src/core/SkPicturePlayback.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkPictureRecord.h" +#include "src/core/SkResourceCache.h" +#include "src/core/SkStreamPriv.h" + +#include + +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +// When we read/write the SkPictInfo via a stream, we have a sentinel byte right after the info. +// Note: in the read/write buffer versions, we have a slightly different convention: +// We have a sentinel int32_t: +// 0 : failure +// 1 : PictureData +// <0 : -size of the custom data +enum { + kFailure_TrailingStreamByteAfterPictInfo = 0, // nothing follows + kPictureData_TrailingStreamByteAfterPictInfo = 1, // SkPictureData follows + kCustom_TrailingStreamByteAfterPictInfo = 2, // -size32 follows +}; + +/* SkPicture impl. This handles generic responsibilities like unique IDs and serialization. */ + +SkPicture::SkPicture() { + static std::atomic nextID{1}; + do { + fUniqueID = nextID.fetch_add(+1, std::memory_order_relaxed); + } while (fUniqueID == 0); +} + +SkPicture::~SkPicture() { + if (fAddedToCache.load()) { + SkResourceCache::PostPurgeSharedID(SkPicturePriv::MakeSharedID(fUniqueID)); + } +} + +static const char kMagic[] = { 's', 'k', 'i', 'a', 'p', 'i', 'c', 't' }; + +SkPictInfo SkPicture::createHeader() const { + SkPictInfo info; + // Copy magic bytes at the beginning of the header + static_assert(sizeof(kMagic) == 8, ""); + static_assert(sizeof(kMagic) == sizeof(info.fMagic), ""); + memcpy(info.fMagic, kMagic, sizeof(kMagic)); + + // Set picture info after magic bytes in the header + info.setVersion(SkPicturePriv::kCurrent_Version); + info.fCullRect = this->cullRect(); + return info; +} + +bool SkPicture::IsValidPictInfo(const SkPictInfo& info) { + if (0 != memcmp(info.fMagic, kMagic, sizeof(kMagic))) { + return false; + } + if (info.getVersion() < SkPicturePriv::kMin_Version || + info.getVersion() > SkPicturePriv::kCurrent_Version) { + return false; + } + return true; +} + +bool SkPicture::StreamIsSKP(SkStream* stream, SkPictInfo* pInfo) { + if (!stream) { + return false; + } + + SkPictInfo info; + SkASSERT(sizeof(kMagic) == sizeof(info.fMagic)); + if (stream->read(&info.fMagic, sizeof(kMagic)) != sizeof(kMagic)) { + return false; + } + + uint32_t version; + if (!stream->readU32(&version)) { return false; } + info.setVersion(version); + if (!stream->readScalar(&info.fCullRect.fLeft )) { return false; } + if (!stream->readScalar(&info.fCullRect.fTop )) { return false; } + if (!stream->readScalar(&info.fCullRect.fRight )) { return false; } + if (!stream->readScalar(&info.fCullRect.fBottom)) { return false; } + + if (pInfo) { + *pInfo = info; + } + return IsValidPictInfo(info); +} + +bool SkPicture_StreamIsSKP(SkStream* stream, SkPictInfo* pInfo) { + return SkPicture::StreamIsSKP(stream, pInfo); +} + +bool SkPicture::BufferIsSKP(SkReadBuffer* buffer, SkPictInfo* pInfo) { + SkPictInfo info; + SkASSERT(sizeof(kMagic) == sizeof(info.fMagic)); + if (!buffer->readByteArray(&info.fMagic, sizeof(kMagic))) { + return false; + } + + info.setVersion(buffer->readUInt()); + buffer->readRect(&info.fCullRect); + + if (IsValidPictInfo(info)) { + if (pInfo) { *pInfo = info; } + return true; + } + return false; +} + +sk_sp SkPicture::Forwardport(const SkPictInfo& info, + const SkPictureData* data, + SkReadBuffer* buffer) { + if (!data) { + return nullptr; + } + if (!data->opData()) { + return nullptr; + } + SkPicturePlayback playback(data); + SkPictureRecorder r; + playback.draw(r.beginRecording(info.fCullRect), nullptr/*no callback*/, buffer); + return r.finishRecordingAsPicture(); +} + +static const int kNestedSKPLimit = 100; // Arbitrarily set + +sk_sp SkPicture::MakeFromStream(SkStream* stream, const SkDeserialProcs* procs) { + return MakeFromStreamPriv(stream, procs, nullptr, kNestedSKPLimit); +} + +sk_sp SkPicture::MakeFromData(const void* data, size_t size, + const SkDeserialProcs* procs) { + if (!data) { + return nullptr; + } + SkMemoryStream stream(data, size); + return MakeFromStreamPriv(&stream, procs, nullptr, kNestedSKPLimit); +} + +sk_sp SkPicture::MakeFromData(const SkData* data, const SkDeserialProcs* procs) { + if (!data) { + return nullptr; + } + SkMemoryStream stream(data->data(), data->size()); + return MakeFromStreamPriv(&stream, procs, nullptr, kNestedSKPLimit); +} + +sk_sp SkPicture::MakeFromStreamPriv(SkStream* stream, const SkDeserialProcs* procsPtr, + SkTypefacePlayback* typefaces, int recursionLimit) { + if (recursionLimit <= 0) { + return nullptr; + } + SkPictInfo info; + if (!StreamIsSKP(stream, &info)) { + return nullptr; + } + + SkDeserialProcs procs; + if (procsPtr) { + procs = *procsPtr; + } + + uint8_t trailingStreamByteAfterPictInfo; + if (!stream->readU8(&trailingStreamByteAfterPictInfo)) { return nullptr; } + switch (trailingStreamByteAfterPictInfo) { + case kPictureData_TrailingStreamByteAfterPictInfo: { + std::unique_ptr data( + SkPictureData::CreateFromStream(stream, info, procs, typefaces, + recursionLimit)); + return Forwardport(info, data.get(), nullptr); + } + case kCustom_TrailingStreamByteAfterPictInfo: { + int32_t ssize; + if (!stream->readS32(&ssize) || ssize >= 0 || !procs.fPictureProc) { + return nullptr; + } + size_t size = sk_negate_to_size_t(ssize); + if (StreamRemainingLengthIsBelow(stream, size)) { + return nullptr; + } + auto data = SkData::MakeUninitialized(size); + if (stream->read(data->writable_data(), size) != size) { + return nullptr; + } + return procs.fPictureProc(data->data(), size, procs.fPictureCtx); + } + default: // fall out to error return + break; + } + return nullptr; +} + +sk_sp SkPicturePriv::MakeFromBuffer(SkReadBuffer& buffer) { + SkPictInfo info; + if (!SkPicture::BufferIsSKP(&buffer, &info)) { + return nullptr; + } + // size should be 0, 1, or negative + int32_t ssize = buffer.read32(); + if (ssize < 0) { + const SkDeserialProcs& procs = buffer.getDeserialProcs(); + if (!procs.fPictureProc) { + return nullptr; + } + size_t size = sk_negate_to_size_t(ssize); + return procs.fPictureProc(buffer.skip(size), size, procs.fPictureCtx); + } + if (ssize != 1) { + // 1 is the magic 'size' that means SkPictureData follows + return nullptr; + } + std::unique_ptr data(SkPictureData::CreateFromBuffer(buffer, info)); + return SkPicture::Forwardport(info, data.get(), &buffer); +} + +SkPictureData* SkPicture::backport() const { + SkPictInfo info = this->createHeader(); + SkPictureRecord rec(info.fCullRect.roundOut(), 0/*flags*/); + rec.beginRecording(); + this->playback(&rec); + rec.endRecording(); + return new SkPictureData(rec, info); +} + +void SkPicture::serialize(SkWStream* stream, const SkSerialProcs* procs) const { + this->serialize(stream, procs, nullptr); +} + +sk_sp SkPicture::serialize(const SkSerialProcs* procs) const { + SkDynamicMemoryWStream stream; + this->serialize(&stream, procs, nullptr); + return stream.detachAsData(); +} + +static sk_sp custom_serialize(const SkPicture* picture, const SkSerialProcs& procs) { + if (procs.fPictureProc) { + auto data = procs.fPictureProc(const_cast(picture), procs.fPictureCtx); + if (data) { + size_t size = data->size(); + if (!SkTFitsIn(size) || size <= 1) { + return SkData::MakeEmpty(); + } + return data; + } + } + return nullptr; +} + +static bool write_pad32(SkWStream* stream, const void* data, size_t size) { + if (!stream->write(data, size)) { + return false; + } + if (size & 3) { + uint32_t zero = 0; + return stream->write(&zero, 4 - (size & 3)); + } + return true; +} + +// Private serialize. +// SkPictureData::serialize makes a first pass on all subpictures, indicatewd by textBlobsOnly=true, +// to fill typefaceSet. +void SkPicture::serialize(SkWStream* stream, const SkSerialProcs* procsPtr, + SkRefCntSet* typefaceSet, bool textBlobsOnly) const { + SkSerialProcs procs; + if (procsPtr) { + procs = *procsPtr; + } + + SkPictInfo info = this->createHeader(); + stream->write(&info, sizeof(info)); + + if (auto custom = custom_serialize(this, procs)) { + int32_t size = SkToS32(custom->size()); + if (size == 0) { + stream->write8(kFailure_TrailingStreamByteAfterPictInfo); + return; + } + stream->write8(kCustom_TrailingStreamByteAfterPictInfo); + stream->write32(-size); // negative for custom format + write_pad32(stream, custom->data(), size); + return; + } + + std::unique_ptr data(this->backport()); + if (data) { + stream->write8(kPictureData_TrailingStreamByteAfterPictInfo); + data->serialize(stream, procs, typefaceSet, textBlobsOnly); + } else { + stream->write8(kFailure_TrailingStreamByteAfterPictInfo); + } +} + +void SkPicturePriv::Flatten(const sk_sp picture, SkWriteBuffer& buffer) { + SkPictInfo info = picture->createHeader(); + std::unique_ptr data(picture->backport()); + + buffer.writeByteArray(&info.fMagic, sizeof(info.fMagic)); + buffer.writeUInt(info.getVersion()); + buffer.writeRect(info.fCullRect); + + if (auto custom = custom_serialize(picture.get(), buffer.fProcs)) { + int32_t size = SkToS32(custom->size()); + buffer.write32(-size); // negative for custom format + buffer.writePad32(custom->data(), size); + return; + } + + if (data) { + buffer.write32(1); // special size meaning SkPictureData + data->flatten(buffer); + } else { + buffer.write32(0); // signal no content + } +} + +sk_sp SkPicture::MakePlaceholder(SkRect cull) { + struct Placeholder : public SkPicture { + explicit Placeholder(SkRect cull) : fCull(cull) {} + + void playback(SkCanvas*, AbortCallback*) const override { } + + // approximateOpCount() needs to be greater than kMaxPictureOpsToUnrollInsteadOfRef + // (SkCanvasPriv.h) to avoid unrolling this into a parent picture. + int approximateOpCount(bool) const override { + return kMaxPictureOpsToUnrollInsteadOfRef+1; + } + size_t approximateBytesUsed() const override { return sizeof(*this); } + SkRect cullRect() const override { return fCull; } + + SkRect fCull; + }; + return sk_make_sp(cull); +} diff --git a/gfx/skia/skia/src/core/SkPictureData.cpp b/gfx/skia/skia/src/core/SkPictureData.cpp new file mode 100644 index 0000000000..d35b35e512 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureData.cpp @@ -0,0 +1,601 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkPictureData.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkSerialProcs.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkAutoMalloc.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkPictureRecord.h" +#include "src/core/SkPtrRecorder.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkStreamPriv.h" +#include "src/core/SkTHash.h" +#include "src/core/SkTextBlobPriv.h" +#include "src/core/SkVerticesPriv.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include + +using namespace skia_private; + +template int SafeCount(const T* obj) { + return obj ? obj->size() : 0; +} + +SkPictureData::SkPictureData(const SkPictInfo& info) + : fInfo(info) {} + +void SkPictureData::initForPlayback() const { + // ensure that the paths bounds are pre-computed + for (int i = 0; i < fPaths.size(); i++) { + fPaths[i].updateBoundsCache(); + } +} + +SkPictureData::SkPictureData(const SkPictureRecord& record, + const SkPictInfo& info) + : fPictures(record.getPictures()) + , fDrawables(record.getDrawables()) + , fTextBlobs(record.getTextBlobs()) + , fVertices(record.getVertices()) + , fImages(record.getImages()) +#if defined(SK_GANESH) + , fSlugs(record.getSlugs()) +#endif + , fInfo(info) { + + fOpData = record.opData(); + + fPaints = record.fPaints; + + fPaths.reset(record.fPaths.count()); + record.fPaths.foreach([this](const SkPath& path, int n) { + // These indices are logically 1-based, but we need to serialize them + // 0-based to keep the deserializing SkPictureData::getPath() working. + fPaths[n-1] = path; + }); + + this->initForPlayback(); +} + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// + +#include "include/core/SkStream.h" + +static size_t compute_chunk_size(SkFlattenable::Factory* array, int count) { + size_t size = 4; // for 'count' + + for (int i = 0; i < count; i++) { + const char* name = SkFlattenable::FactoryToName(array[i]); + if (nullptr == name || 0 == *name) { + size += SkWStream::SizeOfPackedUInt(0); + } else { + size_t len = strlen(name); + size += SkWStream::SizeOfPackedUInt(len); + size += len; + } + } + + return size; +} + +static void write_tag_size(SkWriteBuffer& buffer, uint32_t tag, size_t size) { + buffer.writeUInt(tag); + buffer.writeUInt(SkToU32(size)); +} + +static void write_tag_size(SkWStream* stream, uint32_t tag, size_t size) { + stream->write32(tag); + stream->write32(SkToU32(size)); +} + +void SkPictureData::WriteFactories(SkWStream* stream, const SkFactorySet& rec) { + int count = rec.count(); + + AutoSTMalloc<16, SkFlattenable::Factory> storage(count); + SkFlattenable::Factory* array = (SkFlattenable::Factory*)storage.get(); + rec.copyToArray(array); + + size_t size = compute_chunk_size(array, count); + + // TODO: write_tag_size should really take a size_t + write_tag_size(stream, SK_PICT_FACTORY_TAG, (uint32_t) size); + SkDEBUGCODE(size_t start = stream->bytesWritten()); + stream->write32(count); + + for (int i = 0; i < count; i++) { + const char* name = SkFlattenable::FactoryToName(array[i]); + if (nullptr == name || 0 == *name) { + stream->writePackedUInt(0); + } else { + size_t len = strlen(name); + stream->writePackedUInt(len); + stream->write(name, len); + } + } + + SkASSERT(size == (stream->bytesWritten() - start)); +} + +void SkPictureData::WriteTypefaces(SkWStream* stream, const SkRefCntSet& rec, + const SkSerialProcs& procs) { + int count = rec.count(); + + write_tag_size(stream, SK_PICT_TYPEFACE_TAG, count); + + AutoSTMalloc<16, SkTypeface*> storage(count); + SkTypeface** array = (SkTypeface**)storage.get(); + rec.copyToArray((SkRefCnt**)array); + + for (int i = 0; i < count; i++) { + SkTypeface* tf = array[i]; + if (procs.fTypefaceProc) { + auto data = procs.fTypefaceProc(tf, procs.fTypefaceCtx); + if (data) { + stream->write(data->data(), data->size()); + continue; + } + } + array[i]->serialize(stream); + } +} + +void SkPictureData::flattenToBuffer(SkWriteBuffer& buffer, bool textBlobsOnly) const { + if (!textBlobsOnly) { + int numPaints = fPaints.size(); + if (numPaints > 0) { + write_tag_size(buffer, SK_PICT_PAINT_BUFFER_TAG, numPaints); + for (const SkPaint& paint : fPaints) { + buffer.writePaint(paint); + } + } + + int numPaths = fPaths.size(); + if (numPaths > 0) { + write_tag_size(buffer, SK_PICT_PATH_BUFFER_TAG, numPaths); + buffer.writeInt(numPaths); + for (const SkPath& path : fPaths) { + buffer.writePath(path); + } + } + } + + if (!fTextBlobs.empty()) { + write_tag_size(buffer, SK_PICT_TEXTBLOB_BUFFER_TAG, fTextBlobs.size()); + for (const auto& blob : fTextBlobs) { + SkTextBlobPriv::Flatten(*blob, buffer); + } + } + +#if defined(SK_GANESH) + if (!textBlobsOnly) { + write_tag_size(buffer, SK_PICT_SLUG_BUFFER_TAG, fSlugs.size()); + for (const auto& slug : fSlugs) { + slug->doFlatten(buffer); + } + } +#endif + + if (!textBlobsOnly) { + if (!fVertices.empty()) { + write_tag_size(buffer, SK_PICT_VERTICES_BUFFER_TAG, fVertices.size()); + for (const auto& vert : fVertices) { + vert->priv().encode(buffer); + } + } + + if (!fImages.empty()) { + write_tag_size(buffer, SK_PICT_IMAGE_BUFFER_TAG, fImages.size()); + for (const auto& img : fImages) { + buffer.writeImage(img.get()); + } + } + } +} + +// SkPictureData::serialize() will write out paints, and then write out an array of typefaces +// (unique set). However, paint's serializer will respect SerialProcs, which can cause us to +// call that custom typefaceproc on *every* typeface, not just on the unique ones. To avoid this, +// we ignore the custom proc (here) when we serialize the paints, and then do respect it when +// we serialize the typefaces. +static SkSerialProcs skip_typeface_proc(const SkSerialProcs& procs) { + SkSerialProcs newProcs = procs; + newProcs.fTypefaceProc = nullptr; + newProcs.fTypefaceCtx = nullptr; + return newProcs; +} + +// topLevelTypeFaceSet is null only on the top level call. +// This method is called recursively on every subpicture in two passes. +// textBlobsOnly serves to indicate that we are on the first pass and skip as much work as +// possible that is not relevant to collecting text blobs in topLevelTypeFaceSet +// TODO(nifong): dedupe typefaces and all other shared resources in a faster and more readable way. +void SkPictureData::serialize(SkWStream* stream, const SkSerialProcs& procs, + SkRefCntSet* topLevelTypeFaceSet, bool textBlobsOnly) const { + // This can happen at pretty much any time, so might as well do it first. + write_tag_size(stream, SK_PICT_READER_TAG, fOpData->size()); + stream->write(fOpData->bytes(), fOpData->size()); + + // We serialize all typefaces into the typeface section of the top-level picture. + SkRefCntSet localTypefaceSet; + SkRefCntSet* typefaceSet = topLevelTypeFaceSet ? topLevelTypeFaceSet : &localTypefaceSet; + + // We delay serializing the bulk of our data until after we've serialized + // factories and typefaces by first serializing to an in-memory write buffer. + SkFactorySet factSet; // buffer refs factSet, so factSet must come first. + SkBinaryWriteBuffer buffer; + buffer.setFactoryRecorder(sk_ref_sp(&factSet)); + buffer.setSerialProcs(skip_typeface_proc(procs)); + buffer.setTypefaceRecorder(sk_ref_sp(typefaceSet)); + this->flattenToBuffer(buffer, textBlobsOnly); + + // Pretend to serialize our sub-pictures for the side effect of filling typefaceSet + // with typefaces from sub-pictures. + struct DevNull: public SkWStream { + DevNull() : fBytesWritten(0) {} + size_t fBytesWritten; + bool write(const void*, size_t size) override { fBytesWritten += size; return true; } + size_t bytesWritten() const override { return fBytesWritten; } + } devnull; + for (const auto& pic : fPictures) { + pic->serialize(&devnull, nullptr, typefaceSet, /*textBlobsOnly=*/ true); + } + if (textBlobsOnly) { return; } // return early from fake serialize + + // We need to write factories before we write the buffer. + // We need to write typefaces before we write the buffer or any sub-picture. + WriteFactories(stream, factSet); + // Pass the original typefaceproc (if any) now that we're ready to actually serialize the + // typefaces. We skipped this proc before, when we were serializing paints, so that the + // paints would just write indices into our typeface set. + WriteTypefaces(stream, *typefaceSet, procs); + + // Write the buffer. + write_tag_size(stream, SK_PICT_BUFFER_SIZE_TAG, buffer.bytesWritten()); + buffer.writeToStream(stream); + + // Write sub-pictures by calling serialize again. + if (!fPictures.empty()) { + write_tag_size(stream, SK_PICT_PICTURE_TAG, fPictures.size()); + for (const auto& pic : fPictures) { + pic->serialize(stream, &procs, typefaceSet, /*textBlobsOnly=*/ false); + } + } + + stream->write32(SK_PICT_EOF_TAG); +} + +void SkPictureData::flatten(SkWriteBuffer& buffer) const { + write_tag_size(buffer, SK_PICT_READER_TAG, fOpData->size()); + buffer.writeByteArray(fOpData->bytes(), fOpData->size()); + + if (!fPictures.empty()) { + write_tag_size(buffer, SK_PICT_PICTURE_TAG, fPictures.size()); + for (const auto& pic : fPictures) { + SkPicturePriv::Flatten(pic, buffer); + } + } + + if (!fDrawables.empty()) { + write_tag_size(buffer, SK_PICT_DRAWABLE_TAG, fDrawables.size()); + for (const auto& draw : fDrawables) { + buffer.writeFlattenable(draw.get()); + } + } + + // Write this picture playback's data into a writebuffer + this->flattenToBuffer(buffer, false); + buffer.write32(SK_PICT_EOF_TAG); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkPictureData::parseStreamTag(SkStream* stream, + uint32_t tag, + uint32_t size, + const SkDeserialProcs& procs, + SkTypefacePlayback* topLevelTFPlayback, + int recursionLimit) { + switch (tag) { + case SK_PICT_READER_TAG: + SkASSERT(nullptr == fOpData); + fOpData = SkData::MakeFromStream(stream, size); + if (!fOpData) { + return false; + } + break; + case SK_PICT_FACTORY_TAG: { + if (!stream->readU32(&size)) { return false; } + if (StreamRemainingLengthIsBelow(stream, size)) { + return false; + } + fFactoryPlayback = std::make_unique(size); + for (size_t i = 0; i < size; i++) { + SkString str; + size_t len; + if (!stream->readPackedUInt(&len)) { return false; } + if (StreamRemainingLengthIsBelow(stream, len)) { + return false; + } + str.resize(len); + if (stream->read(str.data(), len) != len) { + return false; + } + fFactoryPlayback->base()[i] = SkFlattenable::NameToFactory(str.c_str()); + } + } break; + case SK_PICT_TYPEFACE_TAG: { + if (StreamRemainingLengthIsBelow(stream, size)) { + return false; + } + fTFPlayback.setCount(size); + for (uint32_t i = 0; i < size; ++i) { + if (stream->isAtEnd()) { + return false; + } + sk_sp tf; + if (procs.fTypefaceProc) { + tf = procs.fTypefaceProc(&stream, sizeof(stream), procs.fTypefaceCtx); + } else { + tf = SkTypeface::MakeDeserialize(stream); + } + if (!tf) { // failed to deserialize + // fTFPlayback asserts it never has a null, so we plop in + // the default here. + tf = SkTypeface::MakeDefault(); + } + fTFPlayback[i] = std::move(tf); + } + } break; + case SK_PICT_PICTURE_TAG: { + SkASSERT(fPictures.empty()); + if (StreamRemainingLengthIsBelow(stream, size)) { + return false; + } + fPictures.reserve_back(SkToInt(size)); + + for (uint32_t i = 0; i < size; i++) { + auto pic = SkPicture::MakeFromStreamPriv(stream, &procs, + topLevelTFPlayback, recursionLimit - 1); + if (!pic) { + return false; + } + fPictures.push_back(std::move(pic)); + } + } break; + case SK_PICT_BUFFER_SIZE_TAG: { + if (StreamRemainingLengthIsBelow(stream, size)) { + return false; + } + SkAutoMalloc storage(size); + if (stream->read(storage.get(), size) != size) { + return false; + } + + SkReadBuffer buffer(storage.get(), size); + buffer.setVersion(fInfo.getVersion()); + + if (!fFactoryPlayback) { + return false; + } + fFactoryPlayback->setupBuffer(buffer); + buffer.setDeserialProcs(procs); + + if (fTFPlayback.count() > 0) { + // .skp files <= v43 have typefaces serialized with each sub picture. + fTFPlayback.setupBuffer(buffer); + } else { + // Newer .skp files serialize all typefaces with the top picture. + topLevelTFPlayback->setupBuffer(buffer); + } + + while (!buffer.eof() && buffer.isValid()) { + tag = buffer.readUInt(); + size = buffer.readUInt(); + this->parseBufferTag(buffer, tag, size); + } + if (!buffer.isValid()) { + return false; + } + } break; + } + return true; // success +} + +static sk_sp create_image_from_buffer(SkReadBuffer& buffer) { + return buffer.readImage(); +} + +static sk_sp create_drawable_from_buffer(SkReadBuffer& buffer) { + return sk_sp((SkDrawable*)buffer.readFlattenable(SkFlattenable::kSkDrawable_Type)); +} + +// We need two types 'cause SkDrawable is const-variant. +template +bool new_array_from_buffer(SkReadBuffer& buffer, uint32_t inCount, + TArray>& array, sk_sp (*factory)(SkReadBuffer&)) { + if (!buffer.validate(array.empty() && SkTFitsIn(inCount))) { + return false; + } + if (0 == inCount) { + return true; + } + + for (uint32_t i = 0; i < inCount; ++i) { + auto obj = factory(buffer); + + if (!buffer.validate(obj != nullptr)) { + array.clear(); + return false; + } + + array.push_back(std::move(obj)); + } + + return true; +} + +void SkPictureData::parseBufferTag(SkReadBuffer& buffer, uint32_t tag, uint32_t size) { + switch (tag) { + case SK_PICT_PAINT_BUFFER_TAG: { + if (!buffer.validate(SkTFitsIn(size))) { + return; + } + const int count = SkToInt(size); + + for (int i = 0; i < count; ++i) { + fPaints.push_back(buffer.readPaint()); + if (!buffer.isValid()) { + return; + } + } + } break; + case SK_PICT_PATH_BUFFER_TAG: + if (size > 0) { + const int count = buffer.readInt(); + if (!buffer.validate(count >= 0)) { + return; + } + for (int i = 0; i < count; i++) { + buffer.readPath(&fPaths.push_back()); + if (!buffer.isValid()) { + return; + } + } + } break; + case SK_PICT_TEXTBLOB_BUFFER_TAG: + new_array_from_buffer(buffer, size, fTextBlobs, SkTextBlobPriv::MakeFromBuffer); + break; + case SK_PICT_SLUG_BUFFER_TAG: +#if defined(SK_GANESH) + new_array_from_buffer(buffer, size, fSlugs, sktext::gpu::Slug::MakeFromBuffer); +#endif + break; + case SK_PICT_VERTICES_BUFFER_TAG: + new_array_from_buffer(buffer, size, fVertices, SkVerticesPriv::Decode); + break; + case SK_PICT_IMAGE_BUFFER_TAG: + new_array_from_buffer(buffer, size, fImages, create_image_from_buffer); + break; + case SK_PICT_READER_TAG: { + // Preflight check that we can initialize all data from the buffer + // before allocating it. + if (!buffer.validateCanReadN(size)) { + return; + } + auto data(SkData::MakeUninitialized(size)); + if (!buffer.readByteArray(data->writable_data(), size) || + !buffer.validate(nullptr == fOpData)) { + return; + } + SkASSERT(nullptr == fOpData); + fOpData = std::move(data); + } break; + case SK_PICT_PICTURE_TAG: + new_array_from_buffer(buffer, size, fPictures, SkPicturePriv::MakeFromBuffer); + break; + case SK_PICT_DRAWABLE_TAG: + new_array_from_buffer(buffer, size, fDrawables, create_drawable_from_buffer); + break; + default: + buffer.validate(false); // The tag was invalid. + break; + } +} + +SkPictureData* SkPictureData::CreateFromStream(SkStream* stream, + const SkPictInfo& info, + const SkDeserialProcs& procs, + SkTypefacePlayback* topLevelTFPlayback, + int recursionLimit) { + std::unique_ptr data(new SkPictureData(info)); + if (!topLevelTFPlayback) { + topLevelTFPlayback = &data->fTFPlayback; + } + + if (!data->parseStream(stream, procs, topLevelTFPlayback, recursionLimit)) { + return nullptr; + } + return data.release(); +} + +SkPictureData* SkPictureData::CreateFromBuffer(SkReadBuffer& buffer, + const SkPictInfo& info) { + std::unique_ptr data(new SkPictureData(info)); + buffer.setVersion(info.getVersion()); + + if (!data->parseBuffer(buffer)) { + return nullptr; + } + return data.release(); +} + +bool SkPictureData::parseStream(SkStream* stream, + const SkDeserialProcs& procs, + SkTypefacePlayback* topLevelTFPlayback, + int recursionLimit) { + for (;;) { + uint32_t tag; + if (!stream->readU32(&tag)) { return false; } + if (SK_PICT_EOF_TAG == tag) { + break; + } + + uint32_t size; + if (!stream->readU32(&size)) { return false; } + if (!this->parseStreamTag(stream, tag, size, procs, topLevelTFPlayback, recursionLimit)) { + return false; // we're invalid + } + } + return true; +} + +bool SkPictureData::parseBuffer(SkReadBuffer& buffer) { + while (buffer.isValid()) { + uint32_t tag = buffer.readUInt(); + if (SK_PICT_EOF_TAG == tag) { + break; + } + this->parseBufferTag(buffer, tag, buffer.readUInt()); + } + + // Check that we encountered required tags + if (!buffer.validate(this->opData() != nullptr)) { + // If we didn't build any opData, we are invalid. Even an EmptyPicture allocates the + // SkData for the ops (though its length may be zero). + return false; + } + return true; +} + +const SkPaint* SkPictureData::optionalPaint(SkReadBuffer* reader) const { + int index = reader->readInt(); + if (index == 0) { + return nullptr; // recorder wrote a zero for no paint (likely drawimage) + } + return reader->validate(index > 0 && index <= fPaints.size()) ? + &fPaints[index - 1] : nullptr; +} + +const SkPaint& SkPictureData::requiredPaint(SkReadBuffer* reader) const { + const SkPaint* paint = this->optionalPaint(reader); + if (reader->validate(paint != nullptr)) { + return *paint; + } + static const SkPaint& stub = *(new SkPaint); + return stub; +} diff --git a/gfx/skia/skia/src/core/SkPictureData.h b/gfx/skia/skia/src/core/SkPictureData.h new file mode 100644 index 0000000000..4a384d0832 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureData.h @@ -0,0 +1,196 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPictureData_DEFINED +#define SkPictureData_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkData.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkImage.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPicture.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTextBlob.h" +#include "include/core/SkTypes.h" +#include "include/core/SkVertices.h" +#include "include/private/base/SkTArray.h" +#include "src/core/SkPictureFlat.h" +#include "src/core/SkReadBuffer.h" + +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +#include +#include + +class SkFactorySet; +class SkPictureRecord; +class SkRefCntSet; +class SkStream; +class SkWStream; +class SkWriteBuffer; +struct SkDeserialProcs; +struct SkSerialProcs; + +struct SkPictInfo { + SkPictInfo() : fVersion(~0U) {} + + uint32_t getVersion() const { + SkASSERT(fVersion != ~0U); + return fVersion; + } + + void setVersion(uint32_t version) { + SkASSERT(version != ~0U); + fVersion = version; + } + +public: + char fMagic[8]; +private: + uint32_t fVersion; +public: + SkRect fCullRect; +}; + +#define SK_PICT_READER_TAG SkSetFourByteTag('r', 'e', 'a', 'd') +#define SK_PICT_FACTORY_TAG SkSetFourByteTag('f', 'a', 'c', 't') +#define SK_PICT_TYPEFACE_TAG SkSetFourByteTag('t', 'p', 'f', 'c') +#define SK_PICT_PICTURE_TAG SkSetFourByteTag('p', 'c', 't', 'r') +#define SK_PICT_DRAWABLE_TAG SkSetFourByteTag('d', 'r', 'a', 'w') + +// This tag specifies the size of the ReadBuffer, needed for the following tags +#define SK_PICT_BUFFER_SIZE_TAG SkSetFourByteTag('a', 'r', 'a', 'y') +// these are all inside the ARRAYS tag +#define SK_PICT_PAINT_BUFFER_TAG SkSetFourByteTag('p', 'n', 't', ' ') +#define SK_PICT_PATH_BUFFER_TAG SkSetFourByteTag('p', 't', 'h', ' ') +#define SK_PICT_TEXTBLOB_BUFFER_TAG SkSetFourByteTag('b', 'l', 'o', 'b') +#define SK_PICT_SLUG_BUFFER_TAG SkSetFourByteTag('s', 'l', 'u', 'g') +#define SK_PICT_VERTICES_BUFFER_TAG SkSetFourByteTag('v', 'e', 'r', 't') +#define SK_PICT_IMAGE_BUFFER_TAG SkSetFourByteTag('i', 'm', 'a', 'g') + +// Always write this last (with no length field afterwards) +#define SK_PICT_EOF_TAG SkSetFourByteTag('e', 'o', 'f', ' ') + +template +T* read_index_base_1_or_null(SkReadBuffer* reader, + const skia_private::TArray>& array) { + int index = reader->readInt(); + return reader->validate(index > 0 && index <= array.size()) ? array[index - 1].get() : nullptr; +} + +class SkPictureData { +public: + SkPictureData(const SkPictureRecord& record, const SkPictInfo&); + // Does not affect ownership of SkStream. + static SkPictureData* CreateFromStream(SkStream*, + const SkPictInfo&, + const SkDeserialProcs&, + SkTypefacePlayback*, + int recursionLimit); + static SkPictureData* CreateFromBuffer(SkReadBuffer&, const SkPictInfo&); + + void serialize(SkWStream*, const SkSerialProcs&, SkRefCntSet*, bool textBlobsOnly=false) const; + void flatten(SkWriteBuffer&) const; + + const SkPictInfo& info() const { return fInfo; } + + const sk_sp& opData() const { return fOpData; } + +protected: + explicit SkPictureData(const SkPictInfo& info); + + // Does not affect ownership of SkStream. + bool parseStream(SkStream*, const SkDeserialProcs&, SkTypefacePlayback*, + int recursionLimit); + bool parseBuffer(SkReadBuffer& buffer); + +public: + const SkImage* getImage(SkReadBuffer* reader) const { + // images are written base-0, unlike paths, pictures, drawables, etc. + const int index = reader->readInt(); + return reader->validateIndex(index, fImages.size()) ? fImages[index].get() : nullptr; + } + + const SkPath& getPath(SkReadBuffer* reader) const { + int index = reader->readInt(); + return reader->validate(index > 0 && index <= fPaths.size()) ? + fPaths[index - 1] : fEmptyPath; + } + + const SkPicture* getPicture(SkReadBuffer* reader) const { + return read_index_base_1_or_null(reader, fPictures); + } + + SkDrawable* getDrawable(SkReadBuffer* reader) const { + return read_index_base_1_or_null(reader, fDrawables); + } + + // Return a paint if one was used for this op, or nullptr if none was used. + const SkPaint* optionalPaint(SkReadBuffer* reader) const; + + // Return the paint used for this op, invalidating the SkReadBuffer if there appears to be none. + // The returned paint is always safe to use. + const SkPaint& requiredPaint(SkReadBuffer* reader) const; + + const SkTextBlob* getTextBlob(SkReadBuffer* reader) const { + return read_index_base_1_or_null(reader, fTextBlobs); + } + +#if defined(SK_GANESH) + const sktext::gpu::Slug* getSlug(SkReadBuffer* reader) const { + return read_index_base_1_or_null(reader, fSlugs); + } +#endif + + const SkVertices* getVertices(SkReadBuffer* reader) const { + return read_index_base_1_or_null(reader, fVertices); + } + +private: + // these help us with reading/writing + // Does not affect ownership of SkStream. + bool parseStreamTag(SkStream*, uint32_t tag, uint32_t size, + const SkDeserialProcs&, SkTypefacePlayback*, + int recursionLimit); + void parseBufferTag(SkReadBuffer&, uint32_t tag, uint32_t size); + void flattenToBuffer(SkWriteBuffer&, bool textBlobsOnly) const; + + skia_private::TArray fPaints; + skia_private::TArray fPaths; + + sk_sp fOpData; // opcodes and parameters + + const SkPath fEmptyPath; + const SkBitmap fEmptyBitmap; + + skia_private::TArray> fPictures; + skia_private::TArray> fDrawables; + skia_private::TArray> fTextBlobs; + skia_private::TArray> fVertices; + skia_private::TArray> fImages; +#if defined(SK_GANESH) + skia_private::TArray> fSlugs; +#endif + + + SkTypefacePlayback fTFPlayback; + std::unique_ptr fFactoryPlayback; + + const SkPictInfo fInfo; + + static void WriteFactories(SkWStream* stream, const SkFactorySet& rec); + static void WriteTypefaces(SkWStream* stream, const SkRefCntSet& rec, const SkSerialProcs&); + + void initForPlayback() const; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPictureFlat.cpp b/gfx/skia/skia/src/core/SkPictureFlat.cpp new file mode 100644 index 0000000000..24c979e12d --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureFlat.cpp @@ -0,0 +1,22 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColorFilter.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkShader.h" +#include "include/core/SkTypeface.h" +#include "include/private/SkChecksum.h" +#include "src/core/SkPictureFlat.h" + +#include + +/////////////////////////////////////////////////////////////////////////////// + +void SkTypefacePlayback::setCount(size_t count) { + fCount = count; + fArray = std::make_unique[]>(count); +} diff --git a/gfx/skia/skia/src/core/SkPictureFlat.h b/gfx/skia/skia/src/core/SkPictureFlat.h new file mode 100644 index 0000000000..36cb274bda --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureFlat.h @@ -0,0 +1,223 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPictureFlat_DEFINED +#define SkPictureFlat_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPicture.h" +#include "include/private/SkChecksum.h" +#include "src/core/SkPtrRecorder.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkTDynamicHash.h" +#include "src/core/SkWriteBuffer.h" + +/* + * Note: While adding new DrawTypes, it is necessary to add to the end of this list + * and update LAST_DRAWTYPE_ENUM to avoid having the code read older skps wrong. + * (which can cause segfaults) + * + * Reordering can be done during version updates. + */ +enum DrawType { + UNUSED, + CLIP_PATH, + CLIP_REGION, + CLIP_RECT, + CLIP_RRECT, + CONCAT, + DRAW_BITMAP_RETIRED_2016_REMOVED_2018, + DRAW_BITMAP_MATRIX_RETIRED_2016_REMOVED_2018, + DRAW_BITMAP_NINE_RETIRED_2016_REMOVED_2018, + DRAW_BITMAP_RECT_RETIRED_2016_REMOVED_2018, + DRAW_CLEAR, + DRAW_DATA, + DRAW_OVAL, + DRAW_PAINT, + DRAW_PATH, + DRAW_PICTURE, + DRAW_POINTS, + DRAW_POS_TEXT_REMOVED_1_2019, + DRAW_POS_TEXT_TOP_BOTTOM_REMOVED_1_2019, + DRAW_POS_TEXT_H_REMOVED_1_2019, + DRAW_POS_TEXT_H_TOP_BOTTOM_REMOVED_1_2019, + DRAW_RECT, + DRAW_RRECT, + DRAW_SPRITE_RETIRED_2015_REMOVED_2018, + DRAW_TEXT_REMOVED_1_2019, + DRAW_TEXT_ON_PATH_RETIRED_08_2018_REMOVED_10_2018, + DRAW_TEXT_TOP_BOTTOM_REMOVED_1_2019, + DRAW_VERTICES_RETIRED_03_2017_REMOVED_01_2018, + RESTORE, + ROTATE, + SAVE, + SAVE_LAYER_SAVEFLAGS_DEPRECATED_2015_REMOVED_12_2020, + SCALE, + SET_MATRIX, + SKEW, + TRANSLATE, + NOOP, + BEGIN_COMMENT_GROUP_obsolete, + COMMENT_obsolete, + END_COMMENT_GROUP_obsolete, + + // new ops -- feel free to re-alphabetize on next version bump + DRAW_DRRECT, + PUSH_CULL, // deprecated, M41 was last Chromium version to write this to an .skp + POP_CULL, // deprecated, M41 was last Chromium version to write this to an .skp + + DRAW_PATCH, // could not add in aphabetical order + DRAW_PICTURE_MATRIX_PAINT, + DRAW_TEXT_BLOB, + DRAW_IMAGE, + DRAW_IMAGE_RECT_STRICT_obsolete, + DRAW_ATLAS, + DRAW_IMAGE_NINE, + DRAW_IMAGE_RECT, + + SAVE_LAYER_SAVELAYERFLAGS_DEPRECATED_JAN_2016_REMOVED_01_2018, + SAVE_LAYER_SAVELAYERREC, + + DRAW_ANNOTATION, + DRAW_DRAWABLE, + DRAW_DRAWABLE_MATRIX, + DRAW_TEXT_RSXFORM_DEPRECATED_DEC_2018, + + TRANSLATE_Z, // deprecated (M60) + + DRAW_SHADOW_REC, + DRAW_IMAGE_LATTICE, + DRAW_ARC, + DRAW_REGION, + DRAW_VERTICES_OBJECT, + + FLUSH, + + DRAW_EDGEAA_IMAGE_SET, + + SAVE_BEHIND, + + DRAW_EDGEAA_QUAD, + + DRAW_BEHIND_PAINT, + CONCAT44, + CLIP_SHADER_IN_PAINT, + MARK_CTM, // deprecated + SET_M44, + + DRAW_IMAGE2, + DRAW_IMAGE_RECT2, + DRAW_IMAGE_LATTICE2, + DRAW_EDGEAA_IMAGE_SET2, + + RESET_CLIP, + + DRAW_SLUG, + + LAST_DRAWTYPE_ENUM = DRAW_SLUG, +}; + +enum DrawVertexFlags { + DRAW_VERTICES_HAS_TEXS = 0x01, + DRAW_VERTICES_HAS_COLORS = 0x02, + DRAW_VERTICES_HAS_INDICES = 0x04, + DRAW_VERTICES_HAS_XFER = 0x08, +}; + +enum DrawAtlasFlags { + DRAW_ATLAS_HAS_COLORS = 1 << 0, + DRAW_ATLAS_HAS_CULL = 1 << 1, + DRAW_ATLAS_HAS_SAMPLING = 1 << 2, +}; + +enum DrawTextRSXformFlags { + DRAW_TEXT_RSXFORM_HAS_CULL = 1 << 0, +}; + +enum SaveLayerRecFlatFlags { + SAVELAYERREC_HAS_BOUNDS = 1 << 0, + SAVELAYERREC_HAS_PAINT = 1 << 1, + SAVELAYERREC_HAS_BACKDROP = 1 << 2, + SAVELAYERREC_HAS_FLAGS = 1 << 3, + SAVELAYERREC_HAS_CLIPMASK_OBSOLETE = 1 << 4, // 6/13/2020 + SAVELAYERREC_HAS_CLIPMATRIX_OBSOLETE = 1 << 5, // 6/13/2020 + SAVELAYERREC_HAS_BACKDROP_SCALE = 1 << 6 +}; + +enum SaveBehindFlatFlags { + SAVEBEHIND_HAS_SUBSET = 1 << 0, +}; + +/////////////////////////////////////////////////////////////////////////////// +// clipparams are packed in 5 bits +// doAA:1 | clipOp:4 + +// Newly serialized pictures will only write kIntersect or kDifference. +static inline uint32_t ClipParams_pack(SkClipOp op, bool doAA) { + unsigned doAABit = doAA ? 1 : 0; + return (doAABit << 4) | static_cast(op); +} + +// But old SKPs may have been serialized with the SK_SUPPORT_DEPRECATED_CLIPOP flag, so might +// encounter expanding clip ops. Thus, this returns the clip op as the more general Region::Op. +static inline SkRegion::Op ClipParams_unpackRegionOp(SkReadBuffer* buffer, uint32_t packed) { + uint32_t unpacked = packed & 0xF; + if (buffer->validate(unpacked <= SkRegion::kIntersect_Op || + (unpacked <= SkRegion::kReplace_Op && + buffer->isVersionLT(SkPicturePriv::kNoExpandingClipOps)))) { + return static_cast(unpacked); + } + return SkRegion::kIntersect_Op; +} + +static inline bool ClipParams_unpackDoAA(uint32_t packed) { + return SkToBool((packed >> 4) & 1); +} + +/////////////////////////////////////////////////////////////////////////////// + +class SkTypefacePlayback { +public: + SkTypefacePlayback() : fCount(0), fArray(nullptr) {} + ~SkTypefacePlayback() = default; + + void setCount(size_t count); + + size_t count() const { return fCount; } + + sk_sp& operator[](size_t index) { + SkASSERT(index < fCount); + return fArray[index]; + } + + void setupBuffer(SkReadBuffer& buffer) const { + buffer.setTypefaceArray(fArray.get(), fCount); + } + +protected: + size_t fCount; + std::unique_ptr[]> fArray; +}; + +class SkFactoryPlayback { +public: + SkFactoryPlayback(int count) : fCount(count) { fArray = new SkFlattenable::Factory[count]; } + + ~SkFactoryPlayback() { delete[] fArray; } + + SkFlattenable::Factory* base() const { return fArray; } + + void setupBuffer(SkReadBuffer& buffer) const { + buffer.setFactoryPlayback(fArray, fCount); + } + +private: + int fCount; + SkFlattenable::Factory* fArray; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPictureImageGenerator.cpp b/gfx/skia/skia/src/core/SkPictureImageGenerator.cpp new file mode 100644 index 0000000000..706812be3d --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureImageGenerator.cpp @@ -0,0 +1,170 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkImageGenerator.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPicture.h" +#include "include/core/SkSurface.h" +#include "include/core/SkSurfaceProps.h" +#include "src/base/SkTLazy.h" +#include "src/image/SkImage_Base.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrTextureProxy.h" +#endif + +class SkPictureImageGenerator : public SkImageGenerator { +public: + SkPictureImageGenerator(const SkImageInfo&, sk_sp, const SkMatrix*, + const SkPaint*, const SkSurfaceProps&); + +protected: + bool onGetPixels(const SkImageInfo&, void* pixels, size_t rowBytes, const Options&) override; + +#if defined(SK_GANESH) + GrSurfaceProxyView onGenerateTexture(GrRecordingContext*, const SkImageInfo&, + GrMipmapped, GrImageTexGenPolicy) override; +#endif + +#if defined(SK_GRAPHITE) + sk_sp onMakeTextureImage(skgpu::graphite::Recorder*, + const SkImageInfo&, + skgpu::Mipmapped) override; +#endif + +private: + sk_sp fPicture; + SkMatrix fMatrix; + SkTLazy fPaint; + SkSurfaceProps fProps; + + using INHERITED = SkImageGenerator; +}; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +std::unique_ptr +SkImageGenerator::MakeFromPicture(const SkISize& size, sk_sp picture, + const SkMatrix* matrix, const SkPaint* paint, + SkImage::BitDepth bitDepth, sk_sp colorSpace) { + return SkImageGenerator::MakeFromPicture(size, picture, matrix, paint, bitDepth, + colorSpace, {}); +} + +std::unique_ptr +SkImageGenerator::MakeFromPicture(const SkISize& size, sk_sp picture, + const SkMatrix* matrix, const SkPaint* paint, + SkImage::BitDepth bitDepth, sk_sp colorSpace, + SkSurfaceProps props) { + if (!picture || !colorSpace || size.isEmpty()) { + return nullptr; + } + + SkColorType colorType = kN32_SkColorType; + if (SkImage::BitDepth::kF16 == bitDepth) { + colorType = kRGBA_F16_SkColorType; + } + + SkImageInfo info = + SkImageInfo::Make(size, colorType, kPremul_SkAlphaType, std::move(colorSpace)); + return std::unique_ptr( + new SkPictureImageGenerator(info, std::move(picture), matrix, paint, props)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkPictureImageGenerator::SkPictureImageGenerator(const SkImageInfo& info, sk_sp picture, + const SkMatrix* matrix, const SkPaint* paint, + const SkSurfaceProps& props) + : SkImageGenerator(info) + , fPicture(std::move(picture)) + , fProps(props) { + + if (matrix) { + fMatrix = *matrix; + } else { + fMatrix.reset(); + } + + if (paint) { + fPaint.set(*paint); + } +} + +bool SkPictureImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + const Options& opts) { + std::unique_ptr canvas = SkCanvas::MakeRasterDirect(info, pixels, rowBytes, &fProps); + if (!canvas) { + return false; + } + canvas->clear(0); + canvas->drawPicture(fPicture, &fMatrix, fPaint.getMaybeNull()); + return true; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/SkGr.h" + +GrSurfaceProxyView SkPictureImageGenerator::onGenerateTexture(GrRecordingContext* ctx, + const SkImageInfo& info, + GrMipmapped mipmapped, + GrImageTexGenPolicy texGenPolicy) { + SkASSERT(ctx); + + skgpu::Budgeted budgeted = texGenPolicy == GrImageTexGenPolicy::kNew_Uncached_Unbudgeted + ? skgpu::Budgeted::kNo + : skgpu::Budgeted::kYes; + auto surface = SkSurface::MakeRenderTarget(ctx, budgeted, info, 0, kTopLeft_GrSurfaceOrigin, + &fProps, mipmapped == GrMipmapped::kYes); + if (!surface) { + return {}; + } + + surface->getCanvas()->clear(SkColors::kTransparent); + surface->getCanvas()->drawPicture(fPicture.get(), &fMatrix, fPaint.getMaybeNull()); + sk_sp image(surface->makeImageSnapshot()); + if (!image) { + return {}; + } + auto [view, ct] = as_IB(image)->asView(ctx, mipmapped); + SkASSERT(view); + SkASSERT(mipmapped == GrMipmapped::kNo || + view.asTextureProxy()->mipmapped() == GrMipmapped::kYes); + return view; +} + +#endif // defined(SK_GANESH) + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Log.h" + +sk_sp SkPictureImageGenerator::onMakeTextureImage(skgpu::graphite::Recorder* recorder, + const SkImageInfo& info, + skgpu::Mipmapped mipmapped) { + using namespace skgpu::graphite; + + sk_sp surface = SkSurface::MakeGraphite(recorder, info, mipmapped); + if (!surface) { + SKGPU_LOG_E("Failed to create Surface"); + return nullptr; + } + + surface->getCanvas()->clear(SkColors::kTransparent); + surface->getCanvas()->drawPicture(fPicture.get(), &fMatrix, fPaint.getMaybeNull()); + return surface->asImage(); +} + +#endif // SK_GRAPHITE diff --git a/gfx/skia/skia/src/core/SkPicturePlayback.cpp b/gfx/skia/skia/src/core/SkPicturePlayback.cpp new file mode 100644 index 0000000000..6c4fe97948 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPicturePlayback.cpp @@ -0,0 +1,739 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/core/SkPicturePlayback.h" + +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkClipOp.h" +#include "include/core/SkColor.h" +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkRegion.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkDrawShadowInfo.h" +#include "src/core/SkPictureData.h" +#include "src/core/SkPictureFlat.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkVerticesPriv.h" +#include "src/utils/SkPatchUtils.h" + +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +class SkDrawable; +class SkPath; +class SkTextBlob; +class SkVertices; + +using namespace skia_private; + +static const SkRect* get_rect_ptr(SkReadBuffer* reader, SkRect* storage) { + if (reader->readBool()) { + reader->readRect(storage); + return storage; + } else { + return nullptr; + } +} + +void SkPicturePlayback::draw(SkCanvas* canvas, + SkPicture::AbortCallback* callback, + SkReadBuffer* buffer) { + AutoResetOpID aroi(this); + SkASSERT(0 == fCurOffset); + + SkReadBuffer reader(fPictureData->opData()->bytes(), + fPictureData->opData()->size()); + reader.setVersion(fPictureData->info().getVersion()); + + // Record this, so we can concat w/ it if we encounter a setMatrix() + SkM44 initialMatrix = canvas->getLocalToDevice(); + + SkAutoCanvasRestore acr(canvas, false); + + while (!reader.eof() && reader.isValid()) { + if (callback && callback->abort()) { + return; + } + + fCurOffset = reader.offset(); + + uint32_t bits = reader.readInt(); + uint32_t op = bits >> 24, + size = bits & 0xffffff; + if (size == 0xffffff) { + size = reader.readInt(); + } + + if (!reader.validate(size > 0 && op > UNUSED && op <= LAST_DRAWTYPE_ENUM)) { + return; + } + + this->handleOp(&reader, (DrawType)op, size, canvas, initialMatrix); + } + + // need to propagate invalid state to the parent reader + if (buffer) { + buffer->validate(reader.isValid()); + } +} + +static void validate_offsetToRestore(SkReadBuffer* reader, size_t offsetToRestore) { + if (offsetToRestore) { + reader->validate(SkIsAlign4(offsetToRestore) && offsetToRestore >= reader->offset()); + } +} + +static bool do_clip_op(SkReadBuffer* reader, SkCanvas* canvas, SkRegion::Op op, + SkClipOp* clipOpToUse) { + switch(op) { + case SkRegion::kDifference_Op: + case SkRegion::kIntersect_Op: + // Fully supported, identity mapping between SkClipOp and Region::Op + *clipOpToUse = static_cast(op); + return true; + case SkRegion::kReplace_Op: + // Emulate the replace by resetting first and following it up with an intersect + SkASSERT(reader->isVersionLT(SkPicturePriv::kNoExpandingClipOps)); + SkCanvasPriv::ResetClip(canvas); + *clipOpToUse = SkClipOp::kIntersect; + return true; + default: + // An expanding clip op, which if encountered on an old SKP, we just silently ignore + SkASSERT(reader->isVersionLT(SkPicturePriv::kNoExpandingClipOps)); + return false; + } +} + +void SkPicturePlayback::handleOp(SkReadBuffer* reader, + DrawType op, + uint32_t size, + SkCanvas* canvas, + const SkM44& initialMatrix) { +#define BREAK_ON_READ_ERROR(r) if (!r->isValid()) break + + switch (op) { + case NOOP: { + SkASSERT(size >= 4); + reader->skip(size - 4); + } break; + case FLUSH: + canvas->flush(); + break; + case CLIP_PATH: { + const SkPath& path = fPictureData->getPath(reader); + uint32_t packed = reader->readInt(); + SkRegion::Op rgnOp = ClipParams_unpackRegionOp(reader, packed); + bool doAA = ClipParams_unpackDoAA(packed); + size_t offsetToRestore = reader->readInt(); + validate_offsetToRestore(reader, offsetToRestore); + BREAK_ON_READ_ERROR(reader); + + SkClipOp clipOp; + if (do_clip_op(reader, canvas, rgnOp, &clipOp)) { + canvas->clipPath(path, clipOp, doAA); + } + if (canvas->isClipEmpty() && offsetToRestore) { + reader->skip(offsetToRestore - reader->offset()); + } + } break; + case CLIP_REGION: { + SkRegion region; + reader->readRegion(®ion); + uint32_t packed = reader->readInt(); + SkRegion::Op rgnOp = ClipParams_unpackRegionOp(reader, packed); + size_t offsetToRestore = reader->readInt(); + validate_offsetToRestore(reader, offsetToRestore); + BREAK_ON_READ_ERROR(reader); + + SkClipOp clipOp; + if (do_clip_op(reader, canvas, rgnOp, &clipOp)) { + canvas->clipRegion(region, clipOp); + } + if (canvas->isClipEmpty() && offsetToRestore) { + reader->skip(offsetToRestore - reader->offset()); + } + } break; + case CLIP_RECT: { + SkRect rect; + reader->readRect(&rect); + uint32_t packed = reader->readInt(); + SkRegion::Op rgnOp = ClipParams_unpackRegionOp(reader, packed); + bool doAA = ClipParams_unpackDoAA(packed); + size_t offsetToRestore = reader->readInt(); + validate_offsetToRestore(reader, offsetToRestore); + BREAK_ON_READ_ERROR(reader); + + SkClipOp clipOp; + if (do_clip_op(reader, canvas, rgnOp, &clipOp)) { + canvas->clipRect(rect, clipOp, doAA); + } + if (canvas->isClipEmpty() && offsetToRestore) { + reader->skip(offsetToRestore - reader->offset()); + } + } break; + case CLIP_RRECT: { + SkRRect rrect; + reader->readRRect(&rrect); + uint32_t packed = reader->readInt(); + SkRegion::Op rgnOp = ClipParams_unpackRegionOp(reader, packed); + bool doAA = ClipParams_unpackDoAA(packed); + size_t offsetToRestore = reader->readInt(); + validate_offsetToRestore(reader, offsetToRestore); + BREAK_ON_READ_ERROR(reader); + + SkClipOp clipOp; + if (do_clip_op(reader, canvas, rgnOp, &clipOp)) { + canvas->clipRRect(rrect, clipOp, doAA); + } + if (canvas->isClipEmpty() && offsetToRestore) { + reader->skip(offsetToRestore - reader->offset()); + } + } break; + case CLIP_SHADER_IN_PAINT: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + // clipShader() was never used in conjunction with deprecated, expanding clip ops, so + // it requires the op to just be intersect or difference. + SkClipOp clipOp = reader->checkRange(SkClipOp::kDifference, SkClipOp::kIntersect); + BREAK_ON_READ_ERROR(reader); + + canvas->clipShader(paint.refShader(), clipOp); + } break; + case RESET_CLIP: + // For Android, an emulated "replace" clip op appears as a manual reset followed by + // an intersect operation (equivalent to the above handling of replace ops encountered + // in old serialized pictures). + SkCanvasPriv::ResetClip(canvas); + break; + case PUSH_CULL: break; // Deprecated, safe to ignore both push and pop. + case POP_CULL: break; + case CONCAT: { + SkMatrix matrix; + reader->readMatrix(&matrix); + BREAK_ON_READ_ERROR(reader); + + canvas->concat(matrix); + break; + } + case CONCAT44: { + const SkScalar* colMaj = reader->skipT(16); + BREAK_ON_READ_ERROR(reader); + canvas->concat(SkM44::ColMajor(colMaj)); + break; + } + case DRAW_ANNOTATION: { + SkRect rect; + reader->readRect(&rect); + SkString key; + reader->readString(&key); + sk_sp data = reader->readByteArrayAsData(); + BREAK_ON_READ_ERROR(reader); + SkASSERT(data); + + canvas->drawAnnotation(rect, key.c_str(), data.get()); + } break; + case DRAW_ARC: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + SkRect rect; + reader->readRect(&rect); + SkScalar startAngle = reader->readScalar(); + SkScalar sweepAngle = reader->readScalar(); + int useCenter = reader->readInt(); + BREAK_ON_READ_ERROR(reader); + + canvas->drawArc(rect, startAngle, sweepAngle, SkToBool(useCenter), paint); + } break; + case DRAW_ATLAS: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* atlas = fPictureData->getImage(reader); + const uint32_t flags = reader->readUInt(); + const int count = reader->readUInt(); + const SkRSXform* xform = (const SkRSXform*)reader->skip(count, sizeof(SkRSXform)); + const SkRect* tex = (const SkRect*)reader->skip(count, sizeof(SkRect)); + const SkColor* colors = nullptr; + SkBlendMode mode = SkBlendMode::kDst; + if (flags & DRAW_ATLAS_HAS_COLORS) { + colors = (const SkColor*)reader->skip(count, sizeof(SkColor)); + mode = reader->read32LE(SkBlendMode::kLastMode); + BREAK_ON_READ_ERROR(reader); + } + const SkRect* cull = nullptr; + if (flags & DRAW_ATLAS_HAS_CULL) { + cull = (const SkRect*)reader->skip(sizeof(SkRect)); + } + BREAK_ON_READ_ERROR(reader); + + SkSamplingOptions sampling; + if (flags & DRAW_ATLAS_HAS_SAMPLING) { + sampling = reader->readSampling(); + BREAK_ON_READ_ERROR(reader); + } + canvas->drawAtlas(atlas, xform, tex, colors, count, mode, sampling, cull, paint); + } break; + case DRAW_CLEAR: { + auto c = reader->readInt(); + BREAK_ON_READ_ERROR(reader); + + canvas->clear(c); + } break; + case DRAW_DATA: { + // This opcode is now dead, just need to skip it for backwards compatibility + size_t length = reader->readInt(); + (void)reader->skip(length); + // skip handles padding the read out to a multiple of 4 + } break; + case DRAW_DRAWABLE: { + auto* d = fPictureData->getDrawable(reader); + BREAK_ON_READ_ERROR(reader); + + canvas->drawDrawable(d); + } break; + case DRAW_DRAWABLE_MATRIX: { + SkMatrix matrix; + reader->readMatrix(&matrix); + SkDrawable* drawable = fPictureData->getDrawable(reader); + BREAK_ON_READ_ERROR(reader); + + canvas->drawDrawable(drawable, &matrix); + } break; + case DRAW_DRRECT: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + SkRRect outer, inner; + reader->readRRect(&outer); + reader->readRRect(&inner); + BREAK_ON_READ_ERROR(reader); + + canvas->drawDRRect(outer, inner, paint); + } break; + case DRAW_EDGEAA_QUAD: { + SkRect rect; + reader->readRect(&rect); + SkCanvas::QuadAAFlags aaFlags = static_cast(reader->read32()); + SkColor4f color; + reader->readColor4f(&color); + SkBlendMode blend = reader->read32LE(SkBlendMode::kLastMode); + BREAK_ON_READ_ERROR(reader); + bool hasClip = reader->readInt(); + SkPoint* clip = nullptr; + if (hasClip) { + clip = (SkPoint*) reader->skip(4, sizeof(SkPoint)); + } + BREAK_ON_READ_ERROR(reader); + canvas->experimental_DrawEdgeAAQuad(rect, clip, aaFlags, color, blend); + } break; + case DRAW_EDGEAA_IMAGE_SET: + case DRAW_EDGEAA_IMAGE_SET2: { + static const size_t kEntryReadSize = + 4 * sizeof(uint32_t) + 2 * sizeof(SkRect) + sizeof(SkScalar); + static const size_t kMatrixSize = 9 * sizeof(SkScalar); // != sizeof(SkMatrix) + + int cnt = reader->readInt(); + if (!reader->validate(cnt >= 0)) { + break; + } + const SkPaint* paint = fPictureData->optionalPaint(reader); + + SkSamplingOptions sampling; + if (op == DRAW_EDGEAA_IMAGE_SET2) { + sampling = reader->readSampling(); + } else { + sampling = SkSamplingOptions(SkFilterMode::kNearest); + } + + SkCanvas::SrcRectConstraint constraint = + reader->checkRange(SkCanvas::kStrict_SrcRectConstraint, + SkCanvas::kFast_SrcRectConstraint); + + if (!reader->validate(SkSafeMath::Mul(cnt, kEntryReadSize) <= reader->available())) { + break; + } + + // Track minimum necessary clip points and matrices that must be provided to satisfy + // the entries. + int expectedClips = 0; + int maxMatrixIndex = -1; + AutoTArray set(cnt); + for (int i = 0; i < cnt && reader->isValid(); ++i) { + set[i].fImage = sk_ref_sp(fPictureData->getImage(reader)); + reader->readRect(&set[i].fSrcRect); + reader->readRect(&set[i].fDstRect); + set[i].fMatrixIndex = reader->readInt(); + set[i].fAlpha = reader->readScalar(); + set[i].fAAFlags = reader->readUInt(); + set[i].fHasClip = reader->readInt(); + + expectedClips += set[i].fHasClip ? 1 : 0; + if (set[i].fMatrixIndex > maxMatrixIndex) { + maxMatrixIndex = set[i].fMatrixIndex; + } + } + + int dstClipCount = reader->readInt(); + SkPoint* dstClips = nullptr; + if (!reader->validate(dstClipCount >= 0) || + !reader->validate(expectedClips <= dstClipCount)) { + // A bad dstClipCount (either negative, or not enough to satisfy entries). + break; + } else if (dstClipCount > 0) { + dstClips = (SkPoint*) reader->skip(dstClipCount, sizeof(SkPoint)); + if (dstClips == nullptr) { + // Not enough bytes remaining so the reader has been invalidated + break; + } + } + int matrixCount = reader->readInt(); + if (!reader->validate(matrixCount >= 0) || + !reader->validate(maxMatrixIndex <= (matrixCount - 1)) || + !reader->validate( + SkSafeMath::Mul(matrixCount, kMatrixSize) <= reader->available())) { + // Entries access out-of-bound matrix indices, given provided matrices or + // there aren't enough bytes to provide that many matrices + break; + } + TArray matrices(matrixCount); + for (int i = 0; i < matrixCount && reader->isValid(); ++i) { + reader->readMatrix(&matrices.push_back()); + } + BREAK_ON_READ_ERROR(reader); + + canvas->experimental_DrawEdgeAAImageSet(set.get(), cnt, dstClips, matrices.begin(), + sampling, paint, constraint); + } break; + case DRAW_IMAGE: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* image = fPictureData->getImage(reader); + SkPoint loc; + reader->readPoint(&loc); + BREAK_ON_READ_ERROR(reader); + + canvas->drawImage(image, loc.fX, loc.fY, + SkSamplingOptions(SkFilterMode::kNearest), + paint); + } break; + case DRAW_IMAGE2: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* image = fPictureData->getImage(reader); + SkPoint loc; + reader->readPoint(&loc); + SkSamplingOptions sampling = reader->readSampling(); + BREAK_ON_READ_ERROR(reader); + + canvas->drawImage(image, loc.fX, loc.fY, sampling, paint); + } break; + case DRAW_IMAGE_LATTICE: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* image = fPictureData->getImage(reader); + SkCanvas::Lattice lattice; + (void)SkCanvasPriv::ReadLattice(*reader, &lattice); + const SkRect* dst = reader->skipT(); + BREAK_ON_READ_ERROR(reader); + + canvas->drawImageLattice(image, lattice, *dst, SkFilterMode::kNearest, paint); + } break; + case DRAW_IMAGE_LATTICE2: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* image = fPictureData->getImage(reader); + SkCanvas::Lattice lattice; + (void)SkCanvasPriv::ReadLattice(*reader, &lattice); + const SkRect* dst = reader->skipT(); + SkFilterMode filter = reader->read32LE(SkFilterMode::kLinear); + BREAK_ON_READ_ERROR(reader); + + canvas->drawImageLattice(image, lattice, *dst, filter, paint); + } break; + case DRAW_IMAGE_NINE: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* image = fPictureData->getImage(reader); + SkIRect center; + reader->readIRect(¢er); + SkRect dst; + reader->readRect(&dst); + BREAK_ON_READ_ERROR(reader); + + canvas->drawImageNine(image, center, dst, SkFilterMode::kNearest, paint); + } break; + case DRAW_IMAGE_RECT: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* image = fPictureData->getImage(reader); + SkRect storage; + const SkRect* src = get_rect_ptr(reader, &storage); // may be null + SkRect dst; + reader->readRect(&dst); // required + // DRAW_IMAGE_RECT_STRICT assumes this constraint, and doesn't store it + SkCanvas::SrcRectConstraint constraint = SkCanvas::kStrict_SrcRectConstraint; + if (DRAW_IMAGE_RECT == op) { + // newer op-code stores the constraint explicitly + constraint = reader->checkRange(SkCanvas::kStrict_SrcRectConstraint, + SkCanvas::kFast_SrcRectConstraint); + } + BREAK_ON_READ_ERROR(reader); + + auto sampling = SkSamplingOptions(SkFilterMode::kNearest); + if (src) { + canvas->drawImageRect(image, *src, dst, sampling, paint, constraint); + } else { + canvas->drawImageRect(image, dst, sampling, paint); + } + } break; + case DRAW_IMAGE_RECT2: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + const SkImage* image = fPictureData->getImage(reader); + SkRect src = reader->readRect(); + SkRect dst = reader->readRect(); + SkSamplingOptions sampling = reader->readSampling(); + auto constraint = reader->read32LE(SkCanvas::kFast_SrcRectConstraint); + BREAK_ON_READ_ERROR(reader); + + canvas->drawImageRect(image, src, dst, sampling, paint, constraint); + } break; + case DRAW_OVAL: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + SkRect rect; + reader->readRect(&rect); + BREAK_ON_READ_ERROR(reader); + + canvas->drawOval(rect, paint); + } break; + case DRAW_PAINT: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + BREAK_ON_READ_ERROR(reader); + + canvas->drawPaint(paint); + } break; + case DRAW_BEHIND_PAINT: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + BREAK_ON_READ_ERROR(reader); + + SkCanvasPriv::DrawBehind(canvas, paint); + } break; + case DRAW_PATCH: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + + const SkPoint* cubics = (const SkPoint*)reader->skip(SkPatchUtils::kNumCtrlPts, + sizeof(SkPoint)); + uint32_t flag = reader->readInt(); + const SkColor* colors = nullptr; + if (flag & DRAW_VERTICES_HAS_COLORS) { + colors = (const SkColor*)reader->skip(SkPatchUtils::kNumCorners, sizeof(SkColor)); + } + const SkPoint* texCoords = nullptr; + if (flag & DRAW_VERTICES_HAS_TEXS) { + texCoords = (const SkPoint*)reader->skip(SkPatchUtils::kNumCorners, + sizeof(SkPoint)); + } + SkBlendMode bmode = SkBlendMode::kModulate; + if (flag & DRAW_VERTICES_HAS_XFER) { + unsigned mode = reader->readInt(); + if (mode <= (unsigned)SkBlendMode::kLastMode) { + bmode = (SkBlendMode)mode; + } + } + BREAK_ON_READ_ERROR(reader); + + canvas->drawPatch(cubics, colors, texCoords, bmode, paint); + } break; + case DRAW_PATH: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + const auto& path = fPictureData->getPath(reader); + BREAK_ON_READ_ERROR(reader); + + canvas->drawPath(path, paint); + } break; + case DRAW_PICTURE: { + const auto* pic = fPictureData->getPicture(reader); + BREAK_ON_READ_ERROR(reader); + + canvas->drawPicture(pic); + } break; + case DRAW_PICTURE_MATRIX_PAINT: { + const SkPaint* paint = fPictureData->optionalPaint(reader); + SkMatrix matrix; + reader->readMatrix(&matrix); + const SkPicture* pic = fPictureData->getPicture(reader); + BREAK_ON_READ_ERROR(reader); + + canvas->drawPicture(pic, &matrix, paint); + } break; + case DRAW_POINTS: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + SkCanvas::PointMode mode = reader->checkRange(SkCanvas::kPoints_PointMode, + SkCanvas::kPolygon_PointMode); + size_t count = reader->readInt(); + const SkPoint* pts = (const SkPoint*)reader->skip(count, sizeof(SkPoint)); + BREAK_ON_READ_ERROR(reader); + + canvas->drawPoints(mode, count, pts, paint); + } break; + case DRAW_RECT: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + SkRect rect; + reader->readRect(&rect); + BREAK_ON_READ_ERROR(reader); + + canvas->drawRect(rect, paint); + } break; + case DRAW_REGION: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + SkRegion region; + reader->readRegion(®ion); + BREAK_ON_READ_ERROR(reader); + + canvas->drawRegion(region, paint); + } break; + case DRAW_RRECT: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + SkRRect rrect; + reader->readRRect(&rrect); + BREAK_ON_READ_ERROR(reader); + + canvas->drawRRect(rrect, paint); + } break; + case DRAW_SHADOW_REC: { + const auto& path = fPictureData->getPath(reader); + SkDrawShadowRec rec; + reader->readPoint3(&rec.fZPlaneParams); + reader->readPoint3(&rec.fLightPos); + rec.fLightRadius = reader->readScalar(); + rec.fAmbientColor = reader->read32(); + rec.fSpotColor = reader->read32(); + rec.fFlags = reader->read32(); + BREAK_ON_READ_ERROR(reader); + + canvas->private_draw_shadow_rec(path, rec); + } break; + case DRAW_TEXT_BLOB: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + const SkTextBlob* blob = fPictureData->getTextBlob(reader); + SkScalar x = reader->readScalar(); + SkScalar y = reader->readScalar(); + BREAK_ON_READ_ERROR(reader); + + canvas->drawTextBlob(blob, x, y, paint); + } break; + case DRAW_SLUG: { +#if defined(SK_GANESH) + const sktext::gpu::Slug* slug = fPictureData->getSlug(reader); + BREAK_ON_READ_ERROR(reader); + + slug->draw(canvas); +#endif + } break; + case DRAW_VERTICES_OBJECT: { + const SkPaint& paint = fPictureData->requiredPaint(reader); + const SkVertices* vertices = fPictureData->getVertices(reader); + const int boneCount = reader->readInt(); + (void)reader->skip(boneCount, sizeof(SkVertices_DeprecatedBone)); + SkBlendMode bmode = reader->read32LE(SkBlendMode::kLastMode); + BREAK_ON_READ_ERROR(reader); + + if (vertices) { // TODO: read error if vertices == null? + canvas->drawVertices(vertices, bmode, paint); + } + } break; + case RESTORE: + canvas->restore(); + break; + case ROTATE: { + auto deg = reader->readScalar(); + canvas->rotate(deg); + } break; + case SAVE: + canvas->save(); + break; + case SAVE_BEHIND: { + uint32_t flags = reader->readInt(); + const SkRect* subset = nullptr; + SkRect storage; + if (flags & SAVEBEHIND_HAS_SUBSET) { + reader->readRect(&storage); + subset = &storage; + } + SkCanvasPriv::SaveBehind(canvas, subset); + } break; + case SAVE_LAYER_SAVELAYERREC: { + SkCanvas::SaveLayerRec rec(nullptr, nullptr, nullptr, 0); + const uint32_t flatFlags = reader->readInt(); + SkRect bounds; + if (flatFlags & SAVELAYERREC_HAS_BOUNDS) { + reader->readRect(&bounds); + rec.fBounds = &bounds; + } + if (flatFlags & SAVELAYERREC_HAS_PAINT) { + rec.fPaint = &fPictureData->requiredPaint(reader); + } + if (flatFlags & SAVELAYERREC_HAS_BACKDROP) { + const SkPaint& paint = fPictureData->requiredPaint(reader); + rec.fBackdrop = paint.getImageFilter(); + } + if (flatFlags & SAVELAYERREC_HAS_FLAGS) { + rec.fSaveLayerFlags = reader->readInt(); + } + if (flatFlags & SAVELAYERREC_HAS_CLIPMASK_OBSOLETE) { + (void)fPictureData->getImage(reader); + } + if (flatFlags & SAVELAYERREC_HAS_CLIPMATRIX_OBSOLETE) { + SkMatrix clipMatrix_ignored; + reader->readMatrix(&clipMatrix_ignored); + } + if (!reader->isVersionLT(SkPicturePriv::Version::kBackdropScaleFactor) && + (flatFlags & SAVELAYERREC_HAS_BACKDROP_SCALE)) { + SkCanvasPriv::SetBackdropScaleFactor(&rec, reader->readScalar()); + } + BREAK_ON_READ_ERROR(reader); + + canvas->saveLayer(rec); + } break; + case SCALE: { + SkScalar sx = reader->readScalar(); + SkScalar sy = reader->readScalar(); + canvas->scale(sx, sy); + } break; + case SET_M44: { + SkM44 m; + reader->read(&m); + canvas->setMatrix(initialMatrix * m); + } break; + case SET_MATRIX: { + SkMatrix matrix; + reader->readMatrix(&matrix); + canvas->setMatrix(initialMatrix * SkM44(matrix)); + } break; + case SKEW: { + SkScalar sx = reader->readScalar(); + SkScalar sy = reader->readScalar(); + canvas->skew(sx, sy); + } break; + case TRANSLATE: { + SkScalar dx = reader->readScalar(); + SkScalar dy = reader->readScalar(); + canvas->translate(dx, dy); + } break; + default: + reader->validate(false); // unknown op + break; + } + +#undef BREAK_ON_READ_ERROR +} diff --git a/gfx/skia/skia/src/core/SkPicturePlayback.h b/gfx/skia/skia/src/core/SkPicturePlayback.h new file mode 100644 index 0000000000..fdad38e92d --- /dev/null +++ b/gfx/skia/skia/src/core/SkPicturePlayback.h @@ -0,0 +1,67 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPicturePlayback_DEFINED +#define SkPicturePlayback_DEFINED + +#include "include/core/SkM44.h" +#include "include/core/SkPicture.h" +#include "include/private/base/SkNoncopyable.h" +#include "src/core/SkPictureFlat.h" + +#include +#include + +class SkCanvas; +class SkPictureData; +class SkReadBuffer; + +// The basic picture playback class replays the provided picture into a canvas. +class SkPicturePlayback final : SkNoncopyable { +public: + SkPicturePlayback(const SkPictureData* data) + : fPictureData(data) + , fCurOffset(0) { + } + + void draw(SkCanvas* canvas, SkPicture::AbortCallback*, SkReadBuffer* buffer); + + // TODO: remove the curOp calls after cleaning up GrGatherDevice + // Return the ID of the operation currently being executed when playing + // back. 0 indicates no call is active. + size_t curOpID() const { return fCurOffset; } + void resetOpID() { fCurOffset = 0; } + +private: + const SkPictureData* fPictureData; + + // The offset of the current operation when within the draw method + size_t fCurOffset; + + void handleOp(SkReadBuffer* reader, + DrawType op, + uint32_t size, + SkCanvas* canvas, + const SkM44& initialMatrix); + + class AutoResetOpID { + public: + AutoResetOpID(SkPicturePlayback* playback) : fPlayback(playback) { } + ~AutoResetOpID() { + if (fPlayback) { + fPlayback->resetOpID(); + } + } + + private: + SkPicturePlayback* fPlayback; + }; + + using INHERITED = SkNoncopyable; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPicturePriv.h b/gfx/skia/skia/src/core/SkPicturePriv.h new file mode 100644 index 0000000000..e1a0b10e98 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPicturePriv.h @@ -0,0 +1,156 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPicturePriv_DEFINED +#define SkPicturePriv_DEFINED + +#include "include/core/SkPicture.h" + +class SkReadBuffer; +class SkWriteBuffer; +class SkStream; +struct SkPictInfo; + +class SkPicturePriv { +public: + /** + * Recreate a picture that was serialized into a buffer. If the creation requires bitmap + * decoding, the decoder must be set on the SkReadBuffer parameter by calling + * SkReadBuffer::setBitmapDecoder() before calling SkPicture::MakeFromBuffer(). + * @param buffer Serialized picture data. + * @return A new SkPicture representing the serialized data, or NULL if the buffer is + * invalid. + */ + static sk_sp MakeFromBuffer(SkReadBuffer& buffer); + + /** + * Serialize to a buffer. + */ + static void Flatten(const sk_sp , SkWriteBuffer& buffer); + + // Returns NULL if this is not an SkBigPicture. + static const SkBigPicture* AsSkBigPicture(const sk_sp picture) { + return picture->asSkBigPicture(); + } + + static uint64_t MakeSharedID(uint32_t pictureID) { + uint64_t sharedID = SkSetFourByteTag('p', 'i', 'c', 't'); + return (sharedID << 32) | pictureID; + } + + static void AddedToCache(const SkPicture* pic) { + pic->fAddedToCache.store(true); + } + + // V35: Store SkRect (rather then width & height) in header + // V36: Remove (obsolete) alphatype from SkColorTable + // V37: Added shadow only option to SkDropShadowImageFilter (last version to record CLEAR) + // V38: Added PictureResolution option to SkPictureImageFilter + // V39: Added FilterLevel option to SkPictureImageFilter + // V40: Remove UniqueID serialization from SkImageFilter. + // V41: Added serialization of SkBitmapSource's filterQuality parameter + // V42: Added a bool to SkPictureShader serialization to indicate did-we-serialize-a-picture? + // V43: Added DRAW_IMAGE and DRAW_IMAGE_RECT opt codes to serialized data + // V44: Move annotations from paint to drawAnnotation + // V45: Add invNormRotation to SkLightingShader. + // V46: Add drawTextRSXform + // V47: Add occluder rect to SkBlurMaskFilter + // V48: Read and write extended SkTextBlobs. + // V49: Gradients serialized as SkColor4f + SkColorSpace + // V50: SkXfermode -> SkBlendMode + // V51: more SkXfermode -> SkBlendMode + // V52: Remove SkTextBlob::fRunCount + // V53: SaveLayerRec clip mask + // V54: ComposeShader can use a Mode or a Lerp + // V55: Drop blendmode[] from MergeImageFilter + // V56: Add TileMode in SkBlurImageFilter. + // V57: Sweep tiling info. + // V58: No more 2pt conical flipping. + // V59: No more LocalSpace option on PictureImageFilter + // V60: Remove flags in picture header + // V61: Change SkDrawPictureRec to take two colors rather than two alphas + // V62: Don't negate size of custom encoded images (don't write origin x,y either) + // V63: Store image bounds (including origin) instead of just width/height to support subsets + // V64: Remove occluder feature from blur maskFilter + // V65: Float4 paint color + // V66: Add saveBehind + // V67: Blobs serialize fonts instead of paints + // V68: Paint doesn't serialize font-related stuff + // V69: Clean up duplicated and redundant SkImageFilter related enums + // V70: Image filters definitions hidden, registered names updated to include "Impl" + // V71: Unify erode and dilate image filters + // V72: SkColorFilter_Matrix domain (rgba vs. hsla) + // V73: Use SkColor4f in per-edge AA quad API + // V74: MorphologyImageFilter internal radius is SkScaler + // V75: SkVertices switched from unsafe use of SkReader32 to SkReadBuffer (like everything else) + // V76: Add filtering enum to ImageShader + // V77: Explicit filtering options on imageshaders + // V78: Serialize skmipmap data for images that have it + // V79: Cubic Resampler option on imageshader + // V80: Smapling options on imageshader + // V81: sampling parameters on drawImage/drawImageRect/etc. + // V82: Add filter param to picture-shader + // V83: SkMatrixImageFilter now takes SkSamplingOptions instead of SkFilterQuality + // V84: SkImageFilters::Image now takes SkSamplingOptions instead of SkFilterQuality + // V85: Remove legacy support for inheriting sampling from the paint. + // V86: Remove support for custom data inside SkVertices + // V87: SkPaint now holds a user-defined blend function (SkBlender), no longer has DrawLooper + // V88: Add blender to ComposeShader and BlendImageFilter + // V89: Deprecated SkClipOps are no longer supported + // V90: Private API for backdrop scale factor in SaveLayerRec + // V91: Added raw image shaders + // V92: Added anisotropic filtering to SkSamplingOptions + // V94: Removed local matrices from SkShaderBase. Local matrices always use SkLocalMatrixShader. + // V95: SkImageFilters::Shader only saves SkShader, not a full SkPaint + + enum Version { + kPictureShaderFilterParam_Version = 82, + kMatrixImageFilterSampling_Version = 83, + kImageFilterImageSampling_Version = 84, + kNoFilterQualityShaders_Version = 85, + kVerticesRemoveCustomData_Version = 86, + kSkBlenderInSkPaint = 87, + kBlenderInEffects = 88, + kNoExpandingClipOps = 89, + kBackdropScaleFactor = 90, + kRawImageShaders = 91, + kAnisotropicFilter = 92, + kBlend4fColorFilter = 93, + kNoShaderLocalMatrix = 94, + kShaderImageFilterSerializeShader = 95, + + // Only SKPs within the min/current picture version range (inclusive) can be read. + // + // When updating kMin_Version also update oldestSupportedSkpVersion in + // infra/bots/gen_tasks_logic/gen_tasks_logic.go + // + // Steps on how to find which oldestSupportedSkpVersion to use: + // 1) Find the git hash when the desired kMin_Version was the kCurrent_Version from the + // git logs: https://skia.googlesource.com/skia/+log/main/src/core/SkPicturePriv.h + // Eg: https://skia.googlesource.com/skia/+/bfd330d081952424a93d51715653e4d1314d4822%5E%21/#F1 + // + // 2) Use that git hash to find the SKP asset version number at that time here: + // https://skia.googlesource.com/skia/+/bfd330d081952424a93d51715653e4d1314d4822/infra/bots/assets/skp/VERSION + // + // 3) [Optional] Increment the SKP asset version number from step 3 and verify that it has + // the expected version number by downloading the asset and running skpinfo on it. + // + // 4) Use the incremented SKP asset version number as the oldestSupportedSkpVersion in + // infra/bots/gen_tasks_logic/gen_tasks_logic.go + // + // 5) Run `make -C infra/bots train` + // + // Contact the Infra Gardener (or directly ping rmistry@) if the above steps do not work + // for you. + kMin_Version = kPictureShaderFilterParam_Version, + kCurrent_Version = kShaderImageFilterSerializeShader + }; +}; + +bool SkPicture_StreamIsSKP(SkStream*, SkPictInfo*); + +#endif diff --git a/gfx/skia/skia/src/core/SkPictureRecord.cpp b/gfx/skia/skia/src/core/SkPictureRecord.cpp new file mode 100644 index 0000000000..6a4ee9c467 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureRecord.cpp @@ -0,0 +1,953 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkPictureRecord.h" + +#include "include/core/SkRRect.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTextBlob.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkTSearch.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkDrawShadowInfo.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkSamplingPriv.h" +#include "src/image/SkImage_Base.h" +#include "src/utils/SkPatchUtils.h" + +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +using namespace skia_private; + +#define HEAP_BLOCK_SIZE 4096 + +enum { + // just need a value that save or getSaveCount would never return + kNoInitialSave = -1, +}; + +// A lot of basic types get stored as a uint32_t: bools, ints, paint indices, etc. +static int const kUInt32Size = 4; + +SkPictureRecord::SkPictureRecord(const SkIRect& dimensions, uint32_t flags) + : INHERITED(dimensions) + , fRecordFlags(flags) + , fInitialSaveCount(kNoInitialSave) { +} + +SkPictureRecord::SkPictureRecord(const SkISize& dimensions, uint32_t flags) + : SkPictureRecord(SkIRect::MakeSize(dimensions), flags) {} + +/////////////////////////////////////////////////////////////////////////////// + +void SkPictureRecord::onFlush() { + size_t size = sizeof(kUInt32Size); + size_t initialOffset = this->addDraw(FLUSH, &size); + this->validate(initialOffset, size); +} + +void SkPictureRecord::willSave() { + // record the offset to us, making it non-positive to distinguish a save + // from a clip entry. + fRestoreOffsetStack.push_back(-(int32_t)fWriter.bytesWritten()); + this->recordSave(); + + this->INHERITED::willSave(); +} + +void SkPictureRecord::recordSave() { + // op only + size_t size = sizeof(kUInt32Size); + size_t initialOffset = this->addDraw(SAVE, &size); + + this->validate(initialOffset, size); +} + +SkCanvas::SaveLayerStrategy SkPictureRecord::getSaveLayerStrategy(const SaveLayerRec& rec) { + // record the offset to us, making it non-positive to distinguish a save + // from a clip entry. + fRestoreOffsetStack.push_back(-(int32_t)fWriter.bytesWritten()); + this->recordSaveLayer(rec); + + (void)this->INHERITED::getSaveLayerStrategy(rec); + /* No need for a (potentially very big) layer which we don't actually need + at this time (and may not be able to afford since during record our + clip starts out the size of the picture, which is often much larger + than the size of the actual device we'll use during playback). + */ + return kNoLayer_SaveLayerStrategy; +} + +bool SkPictureRecord::onDoSaveBehind(const SkRect* subset) { + fRestoreOffsetStack.push_back(-(int32_t)fWriter.bytesWritten()); + + size_t size = sizeof(kUInt32Size) + sizeof(uint32_t); // op + flags + uint32_t flags = 0; + if (subset) { + flags |= SAVEBEHIND_HAS_SUBSET; + size += sizeof(*subset); + } + + size_t initialOffset = this->addDraw(SAVE_BEHIND, &size); + this->addInt(flags); + if (subset) { + this->addRect(*subset); + } + + this->validate(initialOffset, size); + return false; +} + +void SkPictureRecord::recordSaveLayer(const SaveLayerRec& rec) { + // op + flatflags + size_t size = 2 * kUInt32Size; + uint32_t flatFlags = 0; + + if (rec.fBounds) { + flatFlags |= SAVELAYERREC_HAS_BOUNDS; + size += sizeof(*rec.fBounds); + } + if (rec.fPaint) { + flatFlags |= SAVELAYERREC_HAS_PAINT; + size += sizeof(uint32_t); // index + } + if (rec.fBackdrop) { + flatFlags |= SAVELAYERREC_HAS_BACKDROP; + size += sizeof(uint32_t); // (paint) index + } + if (rec.fSaveLayerFlags) { + flatFlags |= SAVELAYERREC_HAS_FLAGS; + size += sizeof(uint32_t); + } + if (SkCanvasPriv::GetBackdropScaleFactor(rec) != 1.f) { + flatFlags |= SAVELAYERREC_HAS_BACKDROP_SCALE; + size += sizeof(SkScalar); + } + + const size_t initialOffset = this->addDraw(SAVE_LAYER_SAVELAYERREC, &size); + this->addInt(flatFlags); + if (flatFlags & SAVELAYERREC_HAS_BOUNDS) { + this->addRect(*rec.fBounds); + } + if (flatFlags & SAVELAYERREC_HAS_PAINT) { + this->addPaintPtr(rec.fPaint); + } + if (flatFlags & SAVELAYERREC_HAS_BACKDROP) { + // overkill, but we didn't already track single flattenables, so using a paint for that + SkPaint paint; + paint.setImageFilter(sk_ref_sp(const_cast(rec.fBackdrop))); + this->addPaint(paint); + } + if (flatFlags & SAVELAYERREC_HAS_FLAGS) { + this->addInt(rec.fSaveLayerFlags); + } + if (flatFlags & SAVELAYERREC_HAS_BACKDROP_SCALE) { + this->addScalar(SkCanvasPriv::GetBackdropScaleFactor(rec)); + } + this->validate(initialOffset, size); +} + +#ifdef SK_DEBUG +/* + * Read the op code from 'offset' in 'writer' and extract the size too. + */ +static DrawType peek_op_and_size(SkWriter32* writer, size_t offset, uint32_t* size) { + uint32_t peek = writer->readTAt(offset); + + uint32_t op; + UNPACK_8_24(peek, op, *size); + if (MASK_24 == *size) { + // size required its own slot right after the op code + *size = writer->readTAt(offset + kUInt32Size); + } + return (DrawType) op; +} +#endif//SK_DEBUG + +void SkPictureRecord::willRestore() { +#if 0 + SkASSERT(fRestoreOffsetStack.count() > 1); +#endif + + // check for underflow + if (fRestoreOffsetStack.empty()) { + return; + } + + this->recordRestore(); + + fRestoreOffsetStack.pop_back(); + + this->INHERITED::willRestore(); +} + +void SkPictureRecord::recordRestore(bool fillInSkips) { + if (fillInSkips) { + this->fillRestoreOffsetPlaceholdersForCurrentStackLevel((uint32_t)fWriter.bytesWritten()); + } + size_t size = 1 * kUInt32Size; // RESTORE consists solely of 1 op code + size_t initialOffset = this->addDraw(RESTORE, &size); + this->validate(initialOffset, size); +} + +void SkPictureRecord::recordTranslate(const SkMatrix& m) { + SkASSERT(SkMatrix::kTranslate_Mask == m.getType()); + + // op + dx + dy + size_t size = 1 * kUInt32Size + 2 * sizeof(SkScalar); + size_t initialOffset = this->addDraw(TRANSLATE, &size); + this->addScalar(m.getTranslateX()); + this->addScalar(m.getTranslateY()); + this->validate(initialOffset, size); +} + +void SkPictureRecord::recordScale(const SkMatrix& m) { + SkASSERT(SkMatrix::kScale_Mask == m.getType()); + + // op + sx + sy + size_t size = 1 * kUInt32Size + 2 * sizeof(SkScalar); + size_t initialOffset = this->addDraw(SCALE, &size); + this->addScalar(m.getScaleX()); + this->addScalar(m.getScaleY()); + this->validate(initialOffset, size); +} + +void SkPictureRecord::didConcat44(const SkM44& m) { + this->validate(fWriter.bytesWritten(), 0); + // op + matrix + size_t size = kUInt32Size + 16 * sizeof(SkScalar); + size_t initialOffset = this->addDraw(CONCAT44, &size); + fWriter.write(SkMatrixPriv::M44ColMajor(m), 16 * sizeof(SkScalar)); + this->validate(initialOffset, size); + + this->INHERITED::didConcat44(m); +} + +void SkPictureRecord::didSetM44(const SkM44& m) { + this->validate(fWriter.bytesWritten(), 0); + // op + matrix + size_t size = kUInt32Size + 16 * sizeof(SkScalar); + size_t initialOffset = this->addDraw(SET_M44, &size); + fWriter.write(SkMatrixPriv::M44ColMajor(m), 16 * sizeof(SkScalar)); + this->validate(initialOffset, size); + this->INHERITED::didSetM44(m); +} + +void SkPictureRecord::didScale(SkScalar x, SkScalar y) { + this->didConcat44(SkM44::Scale(x, y)); +} + +void SkPictureRecord::didTranslate(SkScalar x, SkScalar y) { + this->didConcat44(SkM44::Translate(x, y)); +} + +void SkPictureRecord::recordConcat(const SkMatrix& matrix) { + this->validate(fWriter.bytesWritten(), 0); + // op + matrix + size_t size = kUInt32Size + SkMatrixPriv::WriteToMemory(matrix, nullptr); + size_t initialOffset = this->addDraw(CONCAT, &size); + this->addMatrix(matrix); + this->validate(initialOffset, size); +} + +void SkPictureRecord::fillRestoreOffsetPlaceholdersForCurrentStackLevel(uint32_t restoreOffset) { + int32_t offset = fRestoreOffsetStack.back(); + while (offset > 0) { + uint32_t peek = fWriter.readTAt(offset); + fWriter.overwriteTAt(offset, restoreOffset); + offset = peek; + } + +#ifdef SK_DEBUG + // offset of 0 has been disabled, so we skip it + if (offset > 0) { + // assert that the final offset value points to a save verb + uint32_t opSize; + DrawType drawOp = peek_op_and_size(&fWriter, -offset, &opSize); + SkASSERT(SAVE == drawOp || SAVE_LAYER_SAVELAYERREC == drawOp); + } +#endif +} + +void SkPictureRecord::beginRecording() { + // we have to call this *after* our constructor, to ensure that it gets + // recorded. This is balanced by restoreToCount() call from endRecording, + // which in-turn calls our overridden restore(), so those get recorded too. + fInitialSaveCount = this->save(); +} + +void SkPictureRecord::endRecording() { + SkASSERT(kNoInitialSave != fInitialSaveCount); + this->restoreToCount(fInitialSaveCount); +} + +size_t SkPictureRecord::recordRestoreOffsetPlaceholder() { + if (fRestoreOffsetStack.empty()) { + return -1; + } + + // The RestoreOffset field is initially filled with a placeholder + // value that points to the offset of the previous RestoreOffset + // in the current stack level, thus forming a linked list so that + // the restore offsets can be filled in when the corresponding + // restore command is recorded. + int32_t prevOffset = fRestoreOffsetStack.back(); + + size_t offset = fWriter.bytesWritten(); + this->addInt(prevOffset); + fRestoreOffsetStack.back() = SkToU32(offset); + return offset; +} + +void SkPictureRecord::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle edgeStyle) { + this->recordClipRect(rect, op, kSoft_ClipEdgeStyle == edgeStyle); + this->INHERITED::onClipRect(rect, op, edgeStyle); +} + +size_t SkPictureRecord::recordClipRect(const SkRect& rect, SkClipOp op, bool doAA) { + // id + rect + clip params + size_t size = 1 * kUInt32Size + sizeof(rect) + 1 * kUInt32Size; + // recordRestoreOffsetPlaceholder doesn't always write an offset + if (!fRestoreOffsetStack.empty()) { + // + restore offset + size += kUInt32Size; + } + size_t initialOffset = this->addDraw(CLIP_RECT, &size); + this->addRect(rect); + this->addInt(ClipParams_pack(op, doAA)); + size_t offset = this->recordRestoreOffsetPlaceholder(); + + this->validate(initialOffset, size); + return offset; +} + +void SkPictureRecord::onClipRRect(const SkRRect& rrect, SkClipOp op, ClipEdgeStyle edgeStyle) { + this->recordClipRRect(rrect, op, kSoft_ClipEdgeStyle == edgeStyle); + this->INHERITED::onClipRRect(rrect, op, edgeStyle); +} + +size_t SkPictureRecord::recordClipRRect(const SkRRect& rrect, SkClipOp op, bool doAA) { + // op + rrect + clip params + size_t size = 1 * kUInt32Size + SkRRect::kSizeInMemory + 1 * kUInt32Size; + // recordRestoreOffsetPlaceholder doesn't always write an offset + if (!fRestoreOffsetStack.empty()) { + // + restore offset + size += kUInt32Size; + } + size_t initialOffset = this->addDraw(CLIP_RRECT, &size); + this->addRRect(rrect); + this->addInt(ClipParams_pack(op, doAA)); + size_t offset = recordRestoreOffsetPlaceholder(); + this->validate(initialOffset, size); + return offset; +} + +void SkPictureRecord::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle edgeStyle) { + int pathID = this->addPathToHeap(path); + this->recordClipPath(pathID, op, kSoft_ClipEdgeStyle == edgeStyle); + this->INHERITED::onClipPath(path, op, edgeStyle); +} + +size_t SkPictureRecord::recordClipPath(int pathID, SkClipOp op, bool doAA) { + // op + path index + clip params + size_t size = 3 * kUInt32Size; + // recordRestoreOffsetPlaceholder doesn't always write an offset + if (!fRestoreOffsetStack.empty()) { + // + restore offset + size += kUInt32Size; + } + size_t initialOffset = this->addDraw(CLIP_PATH, &size); + this->addInt(pathID); + this->addInt(ClipParams_pack(op, doAA)); + size_t offset = recordRestoreOffsetPlaceholder(); + this->validate(initialOffset, size); + return offset; +} + +void SkPictureRecord::onClipShader(sk_sp cs, SkClipOp op) { + // Overkill to store a whole paint, but we don't have an existing structure to just store + // shaders. If size becomes an issue in the future, we can optimize this. + SkPaint paint; + paint.setShader(cs); + + // op + paint index + clipop + size_t size = 3 * kUInt32Size; + size_t initialOffset = this->addDraw(CLIP_SHADER_IN_PAINT, &size); + this->addPaint(paint); + this->addInt((int)op); + this->validate(initialOffset, size); + + this->INHERITED::onClipShader(std::move(cs), op); +} + +void SkPictureRecord::onClipRegion(const SkRegion& region, SkClipOp op) { + this->recordClipRegion(region, op); + this->INHERITED::onClipRegion(region, op); +} + +size_t SkPictureRecord::recordClipRegion(const SkRegion& region, SkClipOp op) { + // op + clip params + region + size_t size = 2 * kUInt32Size + region.writeToMemory(nullptr); + // recordRestoreOffsetPlaceholder doesn't always write an offset + if (!fRestoreOffsetStack.empty()) { + // + restore offset + size += kUInt32Size; + } + size_t initialOffset = this->addDraw(CLIP_REGION, &size); + this->addRegion(region); + this->addInt(ClipParams_pack(op, false)); + size_t offset = this->recordRestoreOffsetPlaceholder(); + + this->validate(initialOffset, size); + return offset; +} + +void SkPictureRecord::onResetClip() { + if (!fRestoreOffsetStack.empty()) { + // Run back through any previous clip ops, and mark their offset to + // be 0, disabling their ability to trigger a jump-to-restore, otherwise + // they could hide this expansion of the clip. + this->fillRestoreOffsetPlaceholdersForCurrentStackLevel(0); + } + size_t size = sizeof(kUInt32Size); + size_t initialOffset = this->addDraw(RESET_CLIP, &size); + this->validate(initialOffset, size); + this->INHERITED::onResetClip(); +} + +void SkPictureRecord::onDrawPaint(const SkPaint& paint) { + // op + paint index + size_t size = 2 * kUInt32Size; + size_t initialOffset = this->addDraw(DRAW_PAINT, &size); + this->addPaint(paint); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawBehind(const SkPaint& paint) { + // logically the same as drawPaint, but with a diff enum + // op + paint index + size_t size = 2 * kUInt32Size; + size_t initialOffset = this->addDraw(DRAW_BEHIND_PAINT, &size); + this->addPaint(paint); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawPoints(PointMode mode, size_t count, const SkPoint pts[], + const SkPaint& paint) { + // op + paint index + mode + count + point data + size_t size = 4 * kUInt32Size + count * sizeof(SkPoint); + size_t initialOffset = this->addDraw(DRAW_POINTS, &size); + this->addPaint(paint); + + this->addInt(mode); + this->addInt(SkToInt(count)); + fWriter.writeMul4(pts, count * sizeof(SkPoint)); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawOval(const SkRect& oval, const SkPaint& paint) { + // op + paint index + rect + size_t size = 2 * kUInt32Size + sizeof(oval); + size_t initialOffset = this->addDraw(DRAW_OVAL, &size); + this->addPaint(paint); + this->addRect(oval); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, + bool useCenter, const SkPaint& paint) { + // op + paint index + rect + start + sweep + bool (as int) + size_t size = 2 * kUInt32Size + sizeof(oval) + sizeof(startAngle) + sizeof(sweepAngle) + + sizeof(int); + size_t initialOffset = this->addDraw(DRAW_ARC, &size); + this->addPaint(paint); + this->addRect(oval); + this->addScalar(startAngle); + this->addScalar(sweepAngle); + this->addInt(useCenter); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawRect(const SkRect& rect, const SkPaint& paint) { + // op + paint index + rect + size_t size = 2 * kUInt32Size + sizeof(rect); + size_t initialOffset = this->addDraw(DRAW_RECT, &size); + this->addPaint(paint); + this->addRect(rect); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawRegion(const SkRegion& region, const SkPaint& paint) { + // op + paint index + region + size_t regionBytes = region.writeToMemory(nullptr); + size_t size = 2 * kUInt32Size + regionBytes; + size_t initialOffset = this->addDraw(DRAW_REGION, &size); + this->addPaint(paint); + fWriter.writeRegion(region); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) { + // op + paint index + rrect + size_t size = 2 * kUInt32Size + SkRRect::kSizeInMemory; + size_t initialOffset = this->addDraw(DRAW_RRECT, &size); + this->addPaint(paint); + this->addRRect(rrect); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, + const SkPaint& paint) { + // op + paint index + rrects + size_t size = 2 * kUInt32Size + SkRRect::kSizeInMemory * 2; + size_t initialOffset = this->addDraw(DRAW_DRRECT, &size); + this->addPaint(paint); + this->addRRect(outer); + this->addRRect(inner); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawPath(const SkPath& path, const SkPaint& paint) { + // op + paint index + path index + size_t size = 3 * kUInt32Size; + size_t initialOffset = this->addDraw(DRAW_PATH, &size); + this->addPaint(paint); + this->addPath(path); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawImage2(const SkImage* image, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint) { + // op + paint_index + image_index + x + y + size_t size = 3 * kUInt32Size + 2 * sizeof(SkScalar) + SkSamplingPriv::FlatSize(sampling); + size_t initialOffset = this->addDraw(DRAW_IMAGE2, &size); + this->addPaintPtr(paint); + this->addImage(image); + this->addScalar(x); + this->addScalar(y); + this->addSampling(sampling); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawImageRect2(const SkImage* image, const SkRect& src, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint* paint, + SrcRectConstraint constraint) { + // id + paint_index + image_index + constraint + size_t size = 3 * kUInt32Size + 2 * sizeof(dst) + SkSamplingPriv::FlatSize(sampling) + + kUInt32Size; + + size_t initialOffset = this->addDraw(DRAW_IMAGE_RECT2, &size); + this->addPaintPtr(paint); + this->addImage(image); + this->addRect(src); + this->addRect(dst); + this->addSampling(sampling); + this->addInt(constraint); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawImageLattice2(const SkImage* image, const Lattice& lattice, + const SkRect& dst, SkFilterMode filter, + const SkPaint* paint) { + size_t latticeSize = SkCanvasPriv::WriteLattice(nullptr, lattice); + // op + paint index + image index + lattice + dst rect + size_t size = 3 * kUInt32Size + latticeSize + sizeof(dst) + sizeof(uint32_t); // filter + size_t initialOffset = this->addDraw(DRAW_IMAGE_LATTICE2, &size); + this->addPaintPtr(paint); + this->addImage(image); + (void)SkCanvasPriv::WriteLattice(fWriter.reservePad(latticeSize), lattice); + this->addRect(dst); + this->addInt(static_cast(filter)); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) { + + // op + paint index + blob index + x/y + size_t size = 3 * kUInt32Size + 2 * sizeof(SkScalar); + size_t initialOffset = this->addDraw(DRAW_TEXT_BLOB, &size); + + this->addPaint(paint); + this->addTextBlob(blob); + this->addScalar(x); + this->addScalar(y); + + this->validate(initialOffset, size); +} + +#if defined(SK_GANESH) +void SkPictureRecord::onDrawSlug(const sktext::gpu::Slug* slug) { + // op + slug id + size_t size = 2 * kUInt32Size; + size_t initialOffset = this->addDraw(DRAW_SLUG, &size); + + this->addSlug(slug); + this->validate(initialOffset, size); +} +#endif + +void SkPictureRecord::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix, + const SkPaint* paint) { + // op + picture index + size_t size = 2 * kUInt32Size; + size_t initialOffset; + + if (nullptr == matrix && nullptr == paint) { + initialOffset = this->addDraw(DRAW_PICTURE, &size); + this->addPicture(picture); + } else { + const SkMatrix& m = matrix ? *matrix : SkMatrix::I(); + size += SkMatrixPriv::WriteToMemory(m, nullptr) + kUInt32Size; // matrix + paint + initialOffset = this->addDraw(DRAW_PICTURE_MATRIX_PAINT, &size); + this->addPaintPtr(paint); + this->addMatrix(m); + this->addPicture(picture); + } + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) { + // op + drawable index + size_t size = 2 * kUInt32Size; + size_t initialOffset; + + if (nullptr == matrix) { + initialOffset = this->addDraw(DRAW_DRAWABLE, &size); + this->addDrawable(drawable); + } else { + size += SkMatrixPriv::WriteToMemory(*matrix, nullptr); // matrix + initialOffset = this->addDraw(DRAW_DRAWABLE_MATRIX, &size); + this->addMatrix(*matrix); + this->addDrawable(drawable); + } + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawVerticesObject(const SkVertices* vertices, + SkBlendMode mode, const SkPaint& paint) { + // op + paint index + vertices index + zero_bones + mode + size_t size = 5 * kUInt32Size; + size_t initialOffset = this->addDraw(DRAW_VERTICES_OBJECT, &size); + + this->addPaint(paint); + this->addVertices(vertices); + this->addInt(0); // legacy bone count + this->addInt(static_cast(mode)); + + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode bmode, + const SkPaint& paint) { + // op + paint index + patch 12 control points + flag + patch 4 colors + 4 texture coordinates + size_t size = 2 * kUInt32Size + SkPatchUtils::kNumCtrlPts * sizeof(SkPoint) + kUInt32Size; + uint32_t flag = 0; + if (colors) { + flag |= DRAW_VERTICES_HAS_COLORS; + size += SkPatchUtils::kNumCorners * sizeof(SkColor); + } + if (texCoords) { + flag |= DRAW_VERTICES_HAS_TEXS; + size += SkPatchUtils::kNumCorners * sizeof(SkPoint); + } + if (SkBlendMode::kModulate != bmode) { + flag |= DRAW_VERTICES_HAS_XFER; + size += kUInt32Size; + } + + size_t initialOffset = this->addDraw(DRAW_PATCH, &size); + this->addPaint(paint); + this->addPatch(cubics); + this->addInt(flag); + + // write optional parameters + if (colors) { + fWriter.write(colors, SkPatchUtils::kNumCorners * sizeof(SkColor)); + } + if (texCoords) { + fWriter.write(texCoords, SkPatchUtils::kNumCorners * sizeof(SkPoint)); + } + if (flag & DRAW_VERTICES_HAS_XFER) { + this->addInt((int)bmode); + } + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawAtlas2(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[], + const SkColor colors[], int count, SkBlendMode mode, + const SkSamplingOptions& sampling, const SkRect* cull, + const SkPaint* paint) { + // [op + paint-index + atlas-index + flags + count] + [xform] + [tex] + [*colors + mode] + cull + size_t size = 5 * kUInt32Size + count * sizeof(SkRSXform) + count * sizeof(SkRect); + size += SkSamplingPriv::FlatSize(sampling); + uint32_t flags = 0; + if (colors) { + flags |= DRAW_ATLAS_HAS_COLORS; + size += count * sizeof(SkColor); + size += sizeof(uint32_t); // xfermode::mode + } + if (cull) { + flags |= DRAW_ATLAS_HAS_CULL; + size += sizeof(SkRect); + } + flags |= DRAW_ATLAS_HAS_SAMPLING; + + size_t initialOffset = this->addDraw(DRAW_ATLAS, &size); + this->addPaintPtr(paint); + this->addImage(atlas); + this->addInt(flags); + this->addInt(count); + fWriter.write(xform, count * sizeof(SkRSXform)); + fWriter.write(tex, count * sizeof(SkRect)); + + // write optional parameters + if (colors) { + fWriter.write(colors, count * sizeof(SkColor)); + this->addInt((int)mode); + } + if (cull) { + fWriter.write(cull, sizeof(SkRect)); + } + this->addSampling(sampling); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) { + // op + path index + zParams + lightPos + lightRadius + spot/ambient alphas + color + flags + size_t size = 2 * kUInt32Size + 2 * sizeof(SkPoint3) + 1 * sizeof(SkScalar) + 3 * kUInt32Size; + size_t initialOffset = this->addDraw(DRAW_SHADOW_REC, &size); + + this->addPath(path); + + fWriter.writePoint3(rec.fZPlaneParams); + fWriter.writePoint3(rec.fLightPos); + fWriter.writeScalar(rec.fLightRadius); + fWriter.write32(rec.fAmbientColor); + fWriter.write32(rec.fSpotColor); + fWriter.write32(rec.fFlags); + + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) { + size_t keyLen = SkWriter32::WriteStringSize(key); + size_t valueLen = SkWriter32::WriteDataSize(value); + size_t size = 4 + sizeof(SkRect) + keyLen + valueLen; + + size_t initialOffset = this->addDraw(DRAW_ANNOTATION, &size); + this->addRect(rect); + fWriter.writeString(key); + fWriter.writeData(value); + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], + SkCanvas::QuadAAFlags aa, const SkColor4f& color, + SkBlendMode mode) { + + // op + rect + aa flags + color + mode + hasClip(as int) + clipCount*points + size_t size = 4 * kUInt32Size + sizeof(SkColor4f) + sizeof(rect) + + (clip ? 4 : 0) * sizeof(SkPoint); + size_t initialOffset = this->addDraw(DRAW_EDGEAA_QUAD, &size); + this->addRect(rect); + this->addInt((int) aa); + fWriter.write(&color, sizeof(SkColor4f)); + this->addInt((int) mode); + this->addInt(clip != nullptr); + if (clip) { + this->addPoints(clip, 4); + } + this->validate(initialOffset, size); +} + +void SkPictureRecord::onDrawEdgeAAImageSet2(const SkCanvas::ImageSetEntry set[], int count, + const SkPoint dstClips[], + const SkMatrix preViewMatrices[], + const SkSamplingOptions& sampling, + const SkPaint* paint, + SkCanvas::SrcRectConstraint constraint) { + static constexpr size_t kMatrixSize = 9 * sizeof(SkScalar); // *not* sizeof(SkMatrix) + // op + count + paint + constraint + (image index, src rect, dst rect, alpha, aa flags, + // hasClip(int), matrixIndex) * cnt + totalClipCount + dstClips + totalMatrixCount + matrices + int totalDstClipCount, totalMatrixCount; + SkCanvasPriv::GetDstClipAndMatrixCounts(set, count, &totalDstClipCount, &totalMatrixCount); + + size_t size = 6 * kUInt32Size + sizeof(SkPoint) * totalDstClipCount + + kMatrixSize * totalMatrixCount + + (4 * kUInt32Size + 2 * sizeof(SkRect) + sizeof(SkScalar)) * count + + SkSamplingPriv::FlatSize(sampling); + size_t initialOffset = this->addDraw(DRAW_EDGEAA_IMAGE_SET2, &size); + this->addInt(count); + this->addPaintPtr(paint); + this->addSampling(sampling); + this->addInt((int) constraint); + for (int i = 0; i < count; ++i) { + this->addImage(set[i].fImage.get()); + this->addRect(set[i].fSrcRect); + this->addRect(set[i].fDstRect); + this->addInt(set[i].fMatrixIndex); + this->addScalar(set[i].fAlpha); + this->addInt((int)set[i].fAAFlags); + this->addInt(set[i].fHasClip); + } + this->addInt(totalDstClipCount); + this->addPoints(dstClips, totalDstClipCount); + this->addInt(totalMatrixCount); + for (int i = 0; i < totalMatrixCount; ++i) { + this->addMatrix(preViewMatrices[i]); + } + this->validate(initialOffset, size); +} + +/////////////////////////////////////////////////////////////////////////////// + +// De-duping helper. + +template +static bool equals(T* a, T* b) { return a->uniqueID() == b->uniqueID(); } + +template <> +bool equals(SkDrawable* a, SkDrawable* b) { + // SkDrawable's generationID is not a stable unique identifier. + return a == b; +} + +template +static int find_or_append(TArray>& array, T* obj) { + for (int i = 0; i < array.size(); i++) { + if (equals(array[i].get(), obj)) { + return i; + } + } + + array.push_back(sk_ref_sp(obj)); + + return array.size() - 1; +} + +sk_sp SkPictureRecord::onNewSurface(const SkImageInfo& info, const SkSurfaceProps&) { + return nullptr; +} + +void SkPictureRecord::addImage(const SkImage* image) { + // convention for images is 0-based index + this->addInt(find_or_append(fImages, image)); +} + +void SkPictureRecord::addMatrix(const SkMatrix& matrix) { + fWriter.writeMatrix(matrix); +} + +void SkPictureRecord::addPaintPtr(const SkPaint* paint) { + if (paint) { + fPaints.push_back(*paint); + this->addInt(fPaints.size()); + } else { + this->addInt(0); + } +} + +int SkPictureRecord::addPathToHeap(const SkPath& path) { + if (int* n = fPaths.find(path)) { + return *n; + } + int n = fPaths.count() + 1; // 0 is reserved for null / error. + fPaths.set(path, n); + return n; +} + +void SkPictureRecord::addPath(const SkPath& path) { + this->addInt(this->addPathToHeap(path)); +} + +void SkPictureRecord::addPatch(const SkPoint cubics[12]) { + fWriter.write(cubics, SkPatchUtils::kNumCtrlPts * sizeof(SkPoint)); +} + +void SkPictureRecord::addPicture(const SkPicture* picture) { + // follow the convention of recording a 1-based index + this->addInt(find_or_append(fPictures, picture) + 1); +} + +void SkPictureRecord::addDrawable(SkDrawable* drawable) { + // follow the convention of recording a 1-based index + this->addInt(find_or_append(fDrawables, drawable) + 1); +} + +void SkPictureRecord::addPoint(const SkPoint& point) { + fWriter.writePoint(point); +} + +void SkPictureRecord::addPoints(const SkPoint pts[], int count) { + fWriter.writeMul4(pts, count * sizeof(SkPoint)); +} + +void SkPictureRecord::addNoOp() { + size_t size = kUInt32Size; // op + this->addDraw(NOOP, &size); +} + +void SkPictureRecord::addRect(const SkRect& rect) { + fWriter.writeRect(rect); +} + +void SkPictureRecord::addRectPtr(const SkRect* rect) { + if (fWriter.writeBool(rect != nullptr)) { + fWriter.writeRect(*rect); + } +} + +void SkPictureRecord::addIRect(const SkIRect& rect) { + fWriter.write(&rect, sizeof(rect)); +} + +void SkPictureRecord::addIRectPtr(const SkIRect* rect) { + if (fWriter.writeBool(rect != nullptr)) { + *(SkIRect*)fWriter.reserve(sizeof(SkIRect)) = *rect; + } +} + +void SkPictureRecord::addRRect(const SkRRect& rrect) { + fWriter.writeRRect(rrect); +} + +void SkPictureRecord::addRegion(const SkRegion& region) { + fWriter.writeRegion(region); +} + +void SkPictureRecord::addSampling(const SkSamplingOptions& sampling) { + fWriter.writeSampling(sampling); +} + +void SkPictureRecord::addText(const void* text, size_t byteLength) { + addInt(SkToInt(byteLength)); + fWriter.writePad(text, byteLength); +} + +void SkPictureRecord::addTextBlob(const SkTextBlob* blob) { + // follow the convention of recording a 1-based index + this->addInt(find_or_append(fTextBlobs, blob) + 1); +} + +#if defined(SK_GANESH) +void SkPictureRecord::addSlug(const sktext::gpu::Slug* slug) { + // follow the convention of recording a 1-based index + this->addInt(find_or_append(fSlugs, slug) + 1); +} +#endif + +void SkPictureRecord::addVertices(const SkVertices* vertices) { + // follow the convention of recording a 1-based index + this->addInt(find_or_append(fVertices, vertices) + 1); +} + +/////////////////////////////////////////////////////////////////////////////// diff --git a/gfx/skia/skia/src/core/SkPictureRecord.h b/gfx/skia/skia/src/core/SkPictureRecord.h new file mode 100644 index 0000000000..dd609b7b8f --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureRecord.h @@ -0,0 +1,271 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPictureRecord_DEFINED +#define SkPictureRecord_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkCanvasVirtualEnforcer.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkPicture.h" +#include "include/core/SkTextBlob.h" +#include "include/core/SkVertices.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkPictureData.h" +#include "src/core/SkTHash.h" +#include "src/core/SkWriter32.h" + +// These macros help with packing and unpacking a single byte value and +// a 3 byte value into/out of a uint32_t +#define MASK_24 0x00FFFFFF +#define UNPACK_8_24(combined, small, large) \ + small = (combined >> 24) & 0xFF; \ + large = combined & MASK_24 +#define PACK_8_24(small, large) ((small << 24) | large) + + +class SkPictureRecord : public SkCanvasVirtualEnforcer { +public: + SkPictureRecord(const SkISize& dimensions, uint32_t recordFlags); + + SkPictureRecord(const SkIRect& dimensions, uint32_t recordFlags); + + const skia_private::TArray>& getPictures() const { + return fPictures; + } + + const skia_private::TArray>& getDrawables() const { + return fDrawables; + } + + const skia_private::TArray>& getTextBlobs() const { + return fTextBlobs; + } + +#if defined(SK_GANESH) + const skia_private::TArray>& getSlugs() const { + return fSlugs; + } +#endif + + const skia_private::TArray>& getVertices() const { + return fVertices; + } + + const skia_private::TArray>& getImages() const { + return fImages; + } + + sk_sp opData() const { + this->validate(fWriter.bytesWritten(), 0); + + if (fWriter.bytesWritten() == 0) { + return SkData::MakeEmpty(); + } + return fWriter.snapshotAsData(); + } + + void setFlags(uint32_t recordFlags) { + fRecordFlags = recordFlags; + } + + const SkWriter32& writeStream() const { + return fWriter; + } + + void beginRecording(); + void endRecording(); + +protected: + void addNoOp(); + +private: + void handleOptimization(int opt); + size_t recordRestoreOffsetPlaceholder(); + void fillRestoreOffsetPlaceholdersForCurrentStackLevel(uint32_t restoreOffset); + + SkTDArray fRestoreOffsetStack; + + SkTDArray fCullOffsetStack; + + /* + * Write the 'drawType' operation and chunk size to the skp. 'size' + * can potentially be increased if the chunk size needs its own storage + * location (i.e., it overflows 24 bits). + * Returns the start offset of the chunk. This is the location at which + * the opcode & size are stored. + * TODO: since we are handing the size into here we could call reserve + * and then return a pointer to the memory storage. This could decrease + * allocation overhead but could lead to more wasted space (the tail + * end of blocks could go unused). Possibly add a second addDraw that + * operates in this manner. + */ + size_t addDraw(DrawType drawType, size_t* size) { + size_t offset = fWriter.bytesWritten(); + + SkASSERT_RELEASE(this->predrawNotify()); + + SkASSERT(0 != *size); + SkASSERT(((uint8_t) drawType) == drawType); + + if (0 != (*size & ~MASK_24) || *size == MASK_24) { + fWriter.writeInt(PACK_8_24(drawType, MASK_24)); + *size += 1; + fWriter.writeInt(SkToU32(*size)); + } else { + fWriter.writeInt(PACK_8_24(drawType, SkToU32(*size))); + } + + return offset; + } + + void addInt(int value) { + fWriter.writeInt(value); + } + void addScalar(SkScalar scalar) { + fWriter.writeScalar(scalar); + } + + void addImage(const SkImage*); + void addMatrix(const SkMatrix& matrix); + void addPaint(const SkPaint& paint) { this->addPaintPtr(&paint); } + void addPaintPtr(const SkPaint* paint); + void addPatch(const SkPoint cubics[12]); + void addPath(const SkPath& path); + void addPicture(const SkPicture* picture); + void addDrawable(SkDrawable* picture); + void addPoint(const SkPoint& point); + void addPoints(const SkPoint pts[], int count); + void addRect(const SkRect& rect); + void addRectPtr(const SkRect* rect); + void addIRect(const SkIRect& rect); + void addIRectPtr(const SkIRect* rect); + void addRRect(const SkRRect&); + void addRegion(const SkRegion& region); + void addSampling(const SkSamplingOptions&); + void addText(const void* text, size_t byteLength); + void addTextBlob(const SkTextBlob* blob); + void addSlug(const sktext::gpu::Slug* slug); + void addVertices(const SkVertices*); + + int find(const SkBitmap& bitmap); + +protected: + void validate(size_t initialOffset, size_t size) const { + SkASSERT(fWriter.bytesWritten() == initialOffset + size); + } + + sk_sp onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override; + bool onPeekPixels(SkPixmap*) override { return false; } + + void onFlush() override; + + void willSave() override; + SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override; + bool onDoSaveBehind(const SkRect*) override; + void willRestore() override; + + void didConcat44(const SkM44&) override; + void didSetM44(const SkM44&) override; + void didScale(SkScalar, SkScalar) override; + void didTranslate(SkScalar, SkScalar) override; + + void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override; + + void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) override; +#if defined(SK_GANESH) + void onDrawSlug(const sktext::gpu::Slug* slug) override; +#endif + void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode, const SkPaint& paint) override; + + void onDrawPaint(const SkPaint&) override; + void onDrawBehind(const SkPaint&) override; + void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override; + void onDrawRect(const SkRect&, const SkPaint&) override; + void onDrawRegion(const SkRegion&, const SkPaint&) override; + void onDrawOval(const SkRect&, const SkPaint&) override; + void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override; + void onDrawRRect(const SkRRect&, const SkPaint&) override; + void onDrawPath(const SkPath&, const SkPaint&) override; + + void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&, + const SkPaint*) override; + void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&, + const SkPaint*, SrcRectConstraint) override; + void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode, + const SkPaint*) override; + void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int, + SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override; + + void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override; + void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override; + + void onClipRect(const SkRect&, SkClipOp, ClipEdgeStyle) override; + void onClipRRect(const SkRRect&, SkClipOp, ClipEdgeStyle) override; + void onClipPath(const SkPath&, SkClipOp, ClipEdgeStyle) override; + void onClipShader(sk_sp, SkClipOp) override; + void onClipRegion(const SkRegion&, SkClipOp) override; + void onResetClip() override; + + void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override; + + void onDrawDrawable(SkDrawable*, const SkMatrix*) override; + void onDrawAnnotation(const SkRect&, const char[], SkData*) override; + + void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&, + SkBlendMode) override; + void onDrawEdgeAAImageSet2(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[], + const SkSamplingOptions&,const SkPaint*, SrcRectConstraint) override; + + int addPathToHeap(const SkPath& path); // does not write to ops stream + + // These entry points allow the writing of matrices, clips, saves & + // restores to be deferred (e.g., if the MC state is being collapsed and + // only written out as needed). + void recordConcat(const SkMatrix& matrix); + void recordTranslate(const SkMatrix& matrix); + void recordScale(const SkMatrix& matrix); + size_t recordClipRect(const SkRect& rect, SkClipOp op, bool doAA); + size_t recordClipRRect(const SkRRect& rrect, SkClipOp op, bool doAA); + size_t recordClipPath(int pathID, SkClipOp op, bool doAA); + size_t recordClipRegion(const SkRegion& region, SkClipOp op); + void recordSave(); + void recordSaveLayer(const SaveLayerRec&); + void recordRestore(bool fillInSkips = true); + +private: + skia_private::TArray fPaints; + + struct PathHash { + uint32_t operator()(const SkPath& p) { return p.getGenerationID(); } + }; + SkTHashMap fPaths; + + SkWriter32 fWriter; + + skia_private::TArray> fImages; + skia_private::TArray> fPictures; + skia_private::TArray> fDrawables; + skia_private::TArray> fTextBlobs; + skia_private::TArray> fVertices; +#if defined(SK_GANESH) + skia_private::TArray> fSlugs; +#endif + + uint32_t fRecordFlags; + int fInitialSaveCount; + + friend class SkPictureData; // for SkPictureData's SkPictureRecord-based constructor + + using INHERITED = SkCanvasVirtualEnforcer; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPictureRecorder.cpp b/gfx/skia/skia/src/core/SkPictureRecorder.cpp new file mode 100644 index 0000000000..caf7d3df92 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPictureRecorder.cpp @@ -0,0 +1,145 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include + +#include "include/core/SkData.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkPictureRecorder.h" +#include "include/core/SkTypes.h" +#include "src/core/SkBigPicture.h" +#include "src/core/SkRecord.h" +#include "src/core/SkRecordDraw.h" +#include "src/core/SkRecordOpts.h" +#include "src/core/SkRecordedDrawable.h" +#include "src/core/SkRecorder.h" + +using namespace skia_private; + +SkPictureRecorder::SkPictureRecorder() { + fActivelyRecording = false; + fRecorder = std::make_unique(nullptr, SkRect::MakeEmpty()); +} + +SkPictureRecorder::~SkPictureRecorder() {} + +SkCanvas* SkPictureRecorder::beginRecording(const SkRect& userCullRect, + sk_sp bbh) { + const SkRect cullRect = userCullRect.isEmpty() ? SkRect::MakeEmpty() : userCullRect; + + fCullRect = cullRect; + fBBH = std::move(bbh); + + if (!fRecord) { + fRecord.reset(new SkRecord); + } + fRecorder->reset(fRecord.get(), cullRect); + fActivelyRecording = true; + return this->getRecordingCanvas(); +} + +SkCanvas* SkPictureRecorder::beginRecording(const SkRect& bounds, SkBBHFactory* factory) { + return this->beginRecording(bounds, factory ? (*factory)() : nullptr); +} + +SkCanvas* SkPictureRecorder::getRecordingCanvas() { + return fActivelyRecording ? fRecorder.get() : nullptr; +} + +class SkEmptyPicture final : public SkPicture { +public: + void playback(SkCanvas*, AbortCallback*) const override { } + + size_t approximateBytesUsed() const override { return sizeof(*this); } + int approximateOpCount(bool nested) const override { return 0; } + SkRect cullRect() const override { return SkRect::MakeEmpty(); } +}; + +sk_sp SkPictureRecorder::finishRecordingAsPicture() { + fActivelyRecording = false; + fRecorder->restoreToCount(1); // If we were missing any restores, add them now. + + if (fRecord->count() == 0) { + return sk_make_sp(); + } + + // TODO: delay as much of this work until just before first playback? + SkRecordOptimize(fRecord.get()); + + SkDrawableList* drawableList = fRecorder->getDrawableList(); + std::unique_ptr pictList{ + drawableList ? drawableList->newDrawableSnapshot() : nullptr + }; + + if (fBBH) { + AutoTMalloc bounds(fRecord->count()); + AutoTMalloc meta(fRecord->count()); + SkRecordFillBounds(fCullRect, *fRecord, bounds, meta); + + fBBH->insert(bounds, meta, fRecord->count()); + + // Now that we've calculated content bounds, we can update fCullRect, often trimming it. + SkRect bbhBound = SkRect::MakeEmpty(); + for (int i = 0; i < fRecord->count(); i++) { + bbhBound.join(bounds[i]); + } + SkASSERT((bbhBound.isEmpty() || fCullRect.contains(bbhBound)) + || (bbhBound.isEmpty() && fCullRect.isEmpty())); + fCullRect = bbhBound; + } + + size_t subPictureBytes = fRecorder->approxBytesUsedBySubPictures(); + for (int i = 0; pictList && i < pictList->count(); i++) { + subPictureBytes += pictList->begin()[i]->approximateBytesUsed(); + } + return sk_make_sp(fCullRect, + std::move(fRecord), + std::move(pictList), + std::move(fBBH), + subPictureBytes); +} + +sk_sp SkPictureRecorder::finishRecordingAsPictureWithCull(const SkRect& cullRect) { + fCullRect = cullRect; + return this->finishRecordingAsPicture(); +} + + +void SkPictureRecorder::partialReplay(SkCanvas* canvas) const { + if (nullptr == canvas) { + return; + } + + int drawableCount = 0; + SkDrawable* const* drawables = nullptr; + SkDrawableList* drawableList = fRecorder->getDrawableList(); + if (drawableList) { + drawableCount = drawableList->count(); + drawables = drawableList->begin(); + } + SkRecordDraw(*fRecord, canvas, nullptr, drawables, drawableCount, nullptr/*bbh*/, nullptr/*callback*/); +} + +sk_sp SkPictureRecorder::finishRecordingAsDrawable() { + fActivelyRecording = false; + fRecorder->restoreToCount(1); // If we were missing any restores, add them now. + + SkRecordOptimize(fRecord.get()); + + if (fBBH) { + AutoTMalloc bounds(fRecord->count()); + AutoTMalloc meta(fRecord->count()); + SkRecordFillBounds(fCullRect, *fRecord, bounds, meta); + fBBH->insert(bounds, meta, fRecord->count()); + } + + sk_sp drawable = + sk_make_sp(std::move(fRecord), std::move(fBBH), + fRecorder->detachDrawableList(), fCullRect); + + return drawable; +} diff --git a/gfx/skia/skia/src/core/SkPixelRef.cpp b/gfx/skia/skia/src/core/SkPixelRef.cpp new file mode 100644 index 0000000000..44d8542a97 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPixelRef.cpp @@ -0,0 +1,149 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPixelRef.h" +#include "include/private/base/SkMutex.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkNextID.h" +#include "src/core/SkPixelRefPriv.h" +#include "src/core/SkTraceEvent.h" + +#include + +uint32_t SkNextID::ImageID() { + // We never set the low bit.... see SkPixelRef::genIDIsUnique(). + static std::atomic nextID{2}; + + uint32_t id; + do { + id = nextID.fetch_add(2, std::memory_order_relaxed); + } while (id == 0); + return id; +} + +/////////////////////////////////////////////////////////////////////////////// + +SkPixelRef::SkPixelRef(int width, int height, void* pixels, size_t rowBytes) + : fWidth(width) + , fHeight(height) + , fPixels(pixels) + , fRowBytes(rowBytes) + , fAddedToCache(false) +{ + this->needsNewGenID(); + fMutability = kMutable; +} + +SkPixelRef::~SkPixelRef() { + this->callGenIDChangeListeners(); +} + +// This is undefined if there are clients in-flight trying to use us +void SkPixelRef::android_only_reset(int width, int height, size_t rowBytes) { + fWidth = width; + fHeight = height; + fRowBytes = rowBytes; + // note: we do not change fPixels + + // conservative, since its possible the "new" settings are the same as the old. + this->notifyPixelsChanged(); +} + +void SkPixelRef::needsNewGenID() { + fTaggedGenID.store(0); + SkASSERT(!this->genIDIsUnique()); // This method isn't threadsafe, so the assert should be fine. +} + +uint32_t SkPixelRef::getGenerationID() const { + uint32_t id = fTaggedGenID.load(); + if (0 == id) { + uint32_t next = SkNextID::ImageID() | 1u; + if (fTaggedGenID.compare_exchange_strong(id, next)) { + id = next; // There was no race or we won the race. fTaggedGenID is next now. + } else { + // We lost a race to set fTaggedGenID. compare_exchange() filled id with the winner. + } + // We can't quite SkASSERT(this->genIDIsUnique()). It could be non-unique + // if we got here via the else path (pretty unlikely, but possible). + } + return id & ~1u; // Mask off bottom unique bit. +} + +void SkPixelRef::addGenIDChangeListener(sk_sp listener) { + if (!listener || !this->genIDIsUnique()) { + // No point in tracking this if we're not going to call it. + return; + } + SkASSERT(!listener->shouldDeregister()); + fGenIDChangeListeners.add(std::move(listener)); +} + +// we need to be called *before* the genID gets changed or zerod +void SkPixelRef::callGenIDChangeListeners() { + // We don't invalidate ourselves if we think another SkPixelRef is sharing our genID. + if (this->genIDIsUnique()) { + fGenIDChangeListeners.changed(); + if (fAddedToCache.exchange(false)) { + SkNotifyBitmapGenIDIsStale(this->getGenerationID()); + } + } else { + // Listeners get at most one shot, so even though these weren't triggered or not, blow them + // away. + fGenIDChangeListeners.reset(); + } +} + +void SkPixelRef::notifyPixelsChanged() { +#ifdef SK_DEBUG + if (this->isImmutable()) { + SkDebugf("========== notifyPixelsChanged called on immutable pixelref"); + } +#endif + this->callGenIDChangeListeners(); + this->needsNewGenID(); +} + +void SkPixelRef::setImmutable() { + fMutability = kImmutable; +} + +void SkPixelRef::setImmutableWithID(uint32_t genID) { + /* + * We are forcing the genID to match an external value. The caller must ensure that this + * value does not conflict with other content. + * + * One use is to force this pixelref's id to match an SkImage's id + */ + fMutability = kImmutable; + fTaggedGenID.store(genID); +} + +void SkPixelRef::setTemporarilyImmutable() { + SkASSERT(fMutability != kImmutable); + fMutability = kTemporarilyImmutable; +} + +void SkPixelRef::restoreMutability() { + SkASSERT(fMutability != kImmutable); + fMutability = kMutable; +} + +sk_sp SkMakePixelRefWithProc(int width, int height, size_t rowBytes, void* addr, + void (*releaseProc)(void* addr, void* ctx), void* ctx) { + SkASSERT(width >= 0 && height >= 0); + if (nullptr == releaseProc) { + return sk_make_sp(width, height, addr, rowBytes); + } + struct PixelRef final : public SkPixelRef { + void (*fReleaseProc)(void*, void*); + void* fReleaseProcContext; + PixelRef(int w, int h, void* s, size_t r, void (*proc)(void*, void*), void* ctx) + : SkPixelRef(w, h, s, r), fReleaseProc(proc), fReleaseProcContext(ctx) {} + ~PixelRef() override { fReleaseProc(this->pixels(), fReleaseProcContext); } + }; + return sk_sp(new PixelRef(width, height, addr, rowBytes, releaseProc, ctx)); +} diff --git a/gfx/skia/skia/src/core/SkPixelRefPriv.h b/gfx/skia/skia/src/core/SkPixelRefPriv.h new file mode 100644 index 0000000000..6198ba9091 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPixelRefPriv.h @@ -0,0 +1,27 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#ifndef SkPixelRefPriv_DEFINED +#define SkPixelRefPriv_DEFINED + +#include "include/core/SkRefCnt.h" + +#include + +class SkPixelRef; + +/** + * Return a new SkMallocPixelRef with the provided pixel storage and + * rowBytes. On destruction, ReleaseProc will be called. + * + * If ReleaseProc is NULL, the pixels will never be released. This + * can be useful if the pixels were stack allocated. However, such an + * SkMallocPixelRef must not live beyond its pixels (e.g. by copying + * an SkBitmap pointing to it, or drawing to an SkPicture). + * + * Returns NULL on failure. + */ +sk_sp SkMakePixelRefWithProc(int w, int h, size_t rowBytes, void* addr, + void (*releaseProc)(void* addr, void* ctx), void* ctx); + +#endif // SkPixelRefPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkPixmap.cpp b/gfx/skia/skia/src/core/SkPixmap.cpp new file mode 100644 index 0000000000..73a79fdb8f --- /dev/null +++ b/gfx/skia/skia/src/core/SkPixmap.cpp @@ -0,0 +1,745 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPixmap.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorPriv.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTPin.h" +#include "src/base/SkHalf.h" +#include "src/base/SkVx.h" +#include "src/core/SkConvertPixels.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkMask.h" +#include "src/core/SkReadPixelsRec.h" +#include "src/core/SkSwizzlePriv.h" +#include "src/opts/SkUtils_opts.h" + +#include +#include +#include + +void SkPixmap::reset() { + fPixels = nullptr; + fRowBytes = 0; + fInfo = SkImageInfo::MakeUnknown(); +} + +void SkPixmap::reset(const SkImageInfo& info, const void* addr, size_t rowBytes) { + if (addr) { + SkASSERT(info.validRowBytes(rowBytes)); + } + fPixels = addr; + fRowBytes = rowBytes; + fInfo = info; +} + +bool SkPixmap::reset(const SkMask& src) { + if (SkMask::kA8_Format == src.fFormat) { + this->reset(SkImageInfo::MakeA8(src.fBounds.width(), src.fBounds.height()), + src.fImage, src.fRowBytes); + return true; + } + this->reset(); + return false; +} + +void SkPixmap::setColorSpace(sk_sp cs) { + fInfo = fInfo.makeColorSpace(std::move(cs)); +} + +SkColorSpace* SkPixmap::colorSpace() const { return fInfo.colorSpace(); } + +sk_sp SkPixmap::refColorSpace() const { return fInfo.refColorSpace(); } + +bool SkPixmap::extractSubset(SkPixmap* result, const SkIRect& subset) const { + SkIRect srcRect, r; + srcRect.setWH(this->width(), this->height()); + if (!r.intersect(srcRect, subset)) { + return false; // r is empty (i.e. no intersection) + } + + // If the upper left of the rectangle was outside the bounds of this SkBitmap, we should have + // exited above. + SkASSERT(static_cast(r.fLeft) < static_cast(this->width())); + SkASSERT(static_cast(r.fTop) < static_cast(this->height())); + + const void* pixels = nullptr; + if (fPixels) { + const size_t bpp = fInfo.bytesPerPixel(); + pixels = (const uint8_t*)fPixels + r.fTop * fRowBytes + r.fLeft * bpp; + } + result->reset(fInfo.makeDimensions(r.size()), pixels, fRowBytes); + return true; +} + +// This is the same as SkPixmap::addr(x,y), but this version gets inlined, while the public +// method does not. Perhaps we could bloat it so it can be inlined, but that would grow code-size +// everywhere, instead of just here (on behalf of getAlphaf()). +static const void* fast_getaddr(const SkPixmap& pm, int x, int y) { + x <<= SkColorTypeShiftPerPixel(pm.colorType()); + return static_cast(pm.addr()) + y * pm.rowBytes() + x; +} + +float SkPixmap::getAlphaf(int x, int y) const { + SkASSERT(this->addr()); + SkASSERT((unsigned)x < (unsigned)this->width()); + SkASSERT((unsigned)y < (unsigned)this->height()); + + float value = 0; + const void* srcPtr = fast_getaddr(*this, x, y); + + switch (this->colorType()) { + case kUnknown_SkColorType: + return 0; + case kGray_8_SkColorType: + case kR8G8_unorm_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16_float_SkColorType: + case kRGB_565_SkColorType: + case kRGB_888x_SkColorType: + case kRGB_101010x_SkColorType: + case kBGR_101010x_SkColorType: + case kBGR_101010x_XR_SkColorType: + case kR8_unorm_SkColorType: + return 1; + case kAlpha_8_SkColorType: + value = static_cast(srcPtr)[0] * (1.0f/255); + break; + case kA16_unorm_SkColorType: + value = static_cast(srcPtr)[0] * (1.0f/65535); + break; + case kA16_float_SkColorType: { + SkHalf half = static_cast(srcPtr)[0]; + value = SkHalfToFloat(half); + break; + } + case kARGB_4444_SkColorType: { + uint16_t u16 = static_cast(srcPtr)[0]; + value = SkGetPackedA4444(u16) * (1.0f/15); + break; + } + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + case kSRGBA_8888_SkColorType: + value = static_cast(srcPtr)[3] * (1.0f/255); + break; + case kRGBA_1010102_SkColorType: + case kBGRA_1010102_SkColorType: { + uint32_t u32 = static_cast(srcPtr)[0]; + value = (u32 >> 30) * (1.0f/3); + break; + } + case kR16G16B16A16_unorm_SkColorType: { + uint64_t u64 = static_cast(srcPtr)[0]; + value = (u64 >> 48) * (1.0f/65535); + break; + } + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: { + uint64_t px; + memcpy(&px, srcPtr, sizeof(px)); + value = SkHalfToFloat_finite_ftz(px)[3]; + break; + } + case kRGBA_F32_SkColorType: + value = static_cast(srcPtr)[3]; + break; + } + return value; +} + +bool SkPixmap::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB, + int x, int y) const { + if (!SkImageInfoValidConversion(dstInfo, fInfo)) { + return false; + } + + SkReadPixelsRec rec(dstInfo, dstPixels, dstRB, x, y); + if (!rec.trim(fInfo.width(), fInfo.height())) { + return false; + } + + const void* srcPixels = this->addr(rec.fX, rec.fY); + const SkImageInfo srcInfo = fInfo.makeDimensions(rec.fInfo.dimensions()); + return SkConvertPixels(rec.fInfo, rec.fPixels, rec.fRowBytes, srcInfo, srcPixels, + this->rowBytes()); +} + +SkColor SkPixmap::getColor(int x, int y) const { + SkASSERT(this->addr()); + SkASSERT((unsigned)x < (unsigned)this->width()); + SkASSERT((unsigned)y < (unsigned)this->height()); + + const bool needsUnpremul = (kPremul_SkAlphaType == fInfo.alphaType()); + auto toColor = [needsUnpremul](uint32_t maybePremulColor) { + return needsUnpremul ? SkUnPreMultiply::PMColorToColor(maybePremulColor) + : SkSwizzle_BGRA_to_PMColor(maybePremulColor); + }; + + switch (this->colorType()) { + case kGray_8_SkColorType: { + uint8_t value = *this->addr8(x, y); + return SkColorSetRGB(value, value, value); + } + case kR8_unorm_SkColorType: { + uint8_t value = *this->addr8(x, y); + return SkColorSetRGB(value, 0, 0); + } + case kAlpha_8_SkColorType: { + return SkColorSetA(0, *this->addr8(x, y)); + } + case kA16_unorm_SkColorType: { + uint16_t value = *this->addr16(x, y); + return SkColorSetA(0, value * (255 / 65535.0f)); + } + case kA16_float_SkColorType: { + SkHalf value = *this->addr16(x, y); + return SkColorSetA(0, 255 * SkHalfToFloat(value)); + } + case kRGB_565_SkColorType: { + return SkPixel16ToColor(*this->addr16(x, y)); + } + case kARGB_4444_SkColorType: { + uint16_t value = *this->addr16(x, y); + SkPMColor c = SkPixel4444ToPixel32(value); + return toColor(c); + } + case kR8G8_unorm_SkColorType: { + uint16_t value = *this->addr16(x, y); + return (uint32_t)( ((value >> 0) & 0xff) ) << 16 + | (uint32_t)( ((value >> 8) & 0xff) ) << 8 + | 0xff000000; + } + case kR16G16_unorm_SkColorType: { + uint32_t value = *this->addr32(x, y); + return (uint32_t)( ((value >> 0) & 0xffff) * (255/65535.0f) ) << 16 + | (uint32_t)( ((value >> 16) & 0xffff) * (255/65535.0f) ) << 8 + | 0xff000000; + } + case kR16G16_float_SkColorType: { + uint32_t value = *this->addr32(x, y); + uint32_t r = 255 * SkHalfToFloat((value >> 0) & 0xffff); + uint32_t g = 255 * SkHalfToFloat((value >> 16) & 0xffff); + return (r << 16) | (g << 8) | 0xff000000; + } + case kRGB_888x_SkColorType: { + uint32_t value = *this->addr32(x, y); + return SkSwizzle_RB(value | 0xff000000); + } + case kBGRA_8888_SkColorType: { + uint32_t value = *this->addr32(x, y); + SkPMColor c = SkSwizzle_BGRA_to_PMColor(value); + return toColor(c); + } + case kRGBA_8888_SkColorType: { + uint32_t value = *this->addr32(x, y); + SkPMColor c = SkSwizzle_RGBA_to_PMColor(value); + return toColor(c); + } + case kSRGBA_8888_SkColorType: { + auto srgb_to_linear = [](float x) { + return (x <= 0.04045f) ? x * (1 / 12.92f) + : sk_float_pow(x * (1 / 1.055f) + (0.055f / 1.055f), 2.4f); + }; + + uint32_t value = *this->addr32(x, y); + float r = ((value >> 0) & 0xff) * (1/255.0f), + g = ((value >> 8) & 0xff) * (1/255.0f), + b = ((value >> 16) & 0xff) * (1/255.0f), + a = ((value >> 24) & 0xff) * (1/255.0f); + r = srgb_to_linear(r); + g = srgb_to_linear(g); + b = srgb_to_linear(b); + if (a != 0 && needsUnpremul) { + r = SkTPin(r/a, 0.0f, 1.0f); + g = SkTPin(g/a, 0.0f, 1.0f); + b = SkTPin(b/a, 0.0f, 1.0f); + } + return (uint32_t)( r * 255.0f ) << 16 + | (uint32_t)( g * 255.0f ) << 8 + | (uint32_t)( b * 255.0f ) << 0 + | (uint32_t)( a * 255.0f ) << 24; + } + case kRGB_101010x_SkColorType: { + uint32_t value = *this->addr32(x, y); + // Convert 10-bit rgb to 8-bit bgr, and mask in 0xff alpha at the top. + return (uint32_t)( ((value >> 0) & 0x3ff) * (255/1023.0f) ) << 16 + | (uint32_t)( ((value >> 10) & 0x3ff) * (255/1023.0f) ) << 8 + | (uint32_t)( ((value >> 20) & 0x3ff) * (255/1023.0f) ) << 0 + | 0xff000000; + } + case kBGR_101010x_XR_SkColorType: { + SkASSERT(false); + return 0; + } + case kBGR_101010x_SkColorType: { + uint32_t value = *this->addr32(x, y); + // Convert 10-bit bgr to 8-bit bgr, and mask in 0xff alpha at the top. + return (uint32_t)( ((value >> 0) & 0x3ff) * (255/1023.0f) ) << 0 + | (uint32_t)( ((value >> 10) & 0x3ff) * (255/1023.0f) ) << 8 + | (uint32_t)( ((value >> 20) & 0x3ff) * (255/1023.0f) ) << 16 + | 0xff000000; + } + case kRGBA_1010102_SkColorType: + case kBGRA_1010102_SkColorType: { + uint32_t value = *this->addr32(x, y); + + float r = ((value >> 0) & 0x3ff) * (1/1023.0f), + g = ((value >> 10) & 0x3ff) * (1/1023.0f), + b = ((value >> 20) & 0x3ff) * (1/1023.0f), + a = ((value >> 30) & 0x3 ) * (1/ 3.0f); + if (this->colorType() == kBGRA_1010102_SkColorType) { + std::swap(r,b); + } + if (a != 0 && needsUnpremul) { + r = SkTPin(r/a, 0.0f, 1.0f); + g = SkTPin(g/a, 0.0f, 1.0f); + b = SkTPin(b/a, 0.0f, 1.0f); + } + return (uint32_t)( r * 255.0f ) << 16 + | (uint32_t)( g * 255.0f ) << 8 + | (uint32_t)( b * 255.0f ) << 0 + | (uint32_t)( a * 255.0f ) << 24; + } + case kR16G16B16A16_unorm_SkColorType: { + uint64_t value = *this->addr64(x, y); + + float r = ((value ) & 0xffff) * (1/65535.0f), + g = ((value >> 16) & 0xffff) * (1/65535.0f), + b = ((value >> 32) & 0xffff) * (1/65535.0f), + a = ((value >> 48) & 0xffff) * (1/65535.0f); + if (a != 0 && needsUnpremul) { + r *= (1.0f/a); + g *= (1.0f/a); + b *= (1.0f/a); + } + return (uint32_t)( r * 255.0f ) << 16 + | (uint32_t)( g * 255.0f ) << 8 + | (uint32_t)( b * 255.0f ) << 0 + | (uint32_t)( a * 255.0f ) << 24; + } + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: { + const uint64_t* addr = + (const uint64_t*)fPixels + y * (fRowBytes >> 3) + x; + skvx::float4 p4 = SkHalfToFloat_finite_ftz(*addr); + if (p4[3] && needsUnpremul) { + float inva = 1 / p4[3]; + p4 = p4 * skvx::float4(inva, inva, inva, 1); + } + // p4 is RGBA, but we want BGRA, so we need to swap next + return Sk4f_toL32(swizzle_rb(p4)); + } + case kRGBA_F32_SkColorType: { + const float* rgba = + (const float*)fPixels + 4*y*(fRowBytes >> 4) + 4*x; + skvx::float4 p4 = skvx::float4::Load(rgba); + // From here on, just like F16: + if (p4[3] && needsUnpremul) { + float inva = 1 / p4[3]; + p4 = p4 * skvx::float4(inva, inva, inva, 1); + } + // p4 is RGBA, but we want BGRA, so we need to swap next + return Sk4f_toL32(swizzle_rb(p4)); + } + case kUnknown_SkColorType: + break; + } + SkDEBUGFAIL(""); + return SkColorSetARGB(0, 0, 0, 0); +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +SkColor4f SkPixmap::getColor4f(int x, int y) const { + SkASSERT(this->addr()); + SkASSERT((unsigned)x < (unsigned)this->width()); + SkASSERT((unsigned)y < (unsigned)this->height()); + + const bool needsUnpremul = (kPremul_SkAlphaType == fInfo.alphaType()); + auto toColor = [needsUnpremul](uint32_t maybePremulColor) { + return needsUnpremul ? SkUnPreMultiply::PMColorToColor(maybePremulColor) + : SkSwizzle_BGRA_to_PMColor(maybePremulColor); + }; + + switch (this->colorType()) { + case kGray_8_SkColorType: { + float value = *this->addr8(x, y) / 255.0f; + return SkColor4f{value, value, value, 1.0}; + } + case kR8_unorm_SkColorType: { + float value = *this->addr8(x, y) / 255.0f; + return SkColor4f{value, 0.0f, 0.0f, 1.0f}; + } + case kAlpha_8_SkColorType: { + float value = *this->addr8(x, y) / 255.0f; + return SkColor4f{0.0f, 0.0f, 0.0f, value}; + } + case kA16_unorm_SkColorType: { + float value = *this->addr16(x, y) / 65535.0f; + return SkColor4f{0.0f, 0.0f, 0.0f, value}; + } + case kA16_float_SkColorType: { + SkHalf value = *this->addr16(x, y); + return SkColor4f{0.0f, 0.0f, 0.0f, SkHalfToFloat(value)}; + } + case kRGB_565_SkColorType: { + SkColor c = SkPixel16ToColor(*this->addr16(x, y)); + return SkColor4f::FromColor(c); + } + case kARGB_4444_SkColorType: { + uint16_t value = *this->addr16(x, y); + SkPMColor c = SkPixel4444ToPixel32(value); + return SkColor4f::FromColor(toColor(c)); + } + case kR8G8_unorm_SkColorType: { + uint16_t value = *this->addr16(x, y); + SkColor c = (uint32_t)(((value >> 0) & 0xff)) << 16 | + (uint32_t)(((value >> 8) & 0xff)) << 8 | 0xff000000; + return SkColor4f::FromColor(c); + } + case kR16G16_unorm_SkColorType: { + uint32_t value = *this->addr32(x, y); + SkColor c = (uint32_t)(((value >> 0) & 0xffff) * (255 / 65535.0f)) << 16 | + (uint32_t)(((value >> 16) & 0xffff) * (255 / 65535.0f)) << 8 | 0xff000000; + return SkColor4f::FromColor(c); + } + case kR16G16_float_SkColorType: { + uint32_t value = *this->addr32(x, y); + float r = SkHalfToFloat((value >> 0) & 0xffff); + float g = SkHalfToFloat((value >> 16) & 0xffff); + return SkColor4f{r, g, 0.0, 1.0}; + } + case kRGB_888x_SkColorType: { + uint32_t value = *this->addr32(x, y); + SkColor c = SkSwizzle_RB(value | 0xff000000); + return SkColor4f::FromColor(c); + } + case kBGRA_8888_SkColorType: { + uint32_t value = *this->addr32(x, y); + SkPMColor c = SkSwizzle_BGRA_to_PMColor(value); + return SkColor4f::FromColor(toColor(c)); + } + case kRGBA_8888_SkColorType: { + uint32_t value = *this->addr32(x, y); + SkPMColor c = SkSwizzle_RGBA_to_PMColor(value); + return SkColor4f::FromColor(toColor(c)); + } + case kSRGBA_8888_SkColorType: { + auto srgb_to_linear = [](float x) { + return (x <= 0.04045f) ? x * (1 / 12.92f) + : sk_float_pow(x * (1 / 1.055f) + (0.055f / 1.055f), 2.4f); + }; + + uint32_t value = *this->addr32(x, y); + float r = ((value >> 0) & 0xff) * (1 / 255.0f), + g = ((value >> 8) & 0xff) * (1 / 255.0f), + b = ((value >> 16) & 0xff) * (1 / 255.0f), + a = ((value >> 24) & 0xff) * (1 / 255.0f); + r = srgb_to_linear(r); + g = srgb_to_linear(g); + b = srgb_to_linear(b); + if (a != 0 && needsUnpremul) { + r = SkTPin(r / a, 0.0f, 1.0f); + g = SkTPin(g / a, 0.0f, 1.0f); + b = SkTPin(b / a, 0.0f, 1.0f); + } + return SkColor4f{r, g, b, a}; + } + case kBGR_101010x_XR_SkColorType: { + SkASSERT(false); + return {}; + } + case kRGB_101010x_SkColorType: { + uint32_t value = *this->addr32(x, y); + // Convert 10-bit rgb to float rgb, and mask in 0xff alpha at the top. + float r = (uint32_t)((value >> 0) & 0x3ff) / (1023.0f); + float g = (uint32_t)((value >> 10) & 0x3ff) / (1023.0f); + float b = (uint32_t)((value >> 20) & 0x3ff) / (1023.0f); + float a = 1.0f; + return SkColor4f{r, g, b, a}; + } + case kBGR_101010x_SkColorType: { + uint32_t value = *this->addr32(x, y); + // Convert 10-bit bgr to float rgb, and mask in 0xff alpha at the top. + float r = (uint32_t)((value >> 20) & 0x3ff) / (1023.0f); + float g = (uint32_t)((value >> 10) & 0x3ff) / (1023.0f); + float b = (uint32_t)((value >> 0) & 0x3ff) / (1023.0f); + float a = 1.0f; + return SkColor4f{r, g, b, a}; + } + case kRGBA_1010102_SkColorType: + case kBGRA_1010102_SkColorType: { + uint32_t value = *this->addr32(x, y); + + float r = ((value >> 0) & 0x3ff) * (1 / 1023.0f), + g = ((value >> 10) & 0x3ff) * (1 / 1023.0f), + b = ((value >> 20) & 0x3ff) * (1 / 1023.0f), + a = ((value >> 30) & 0x3) * (1 / 3.0f); + if (this->colorType() == kBGRA_1010102_SkColorType) { + std::swap(r, b); + } + if (a != 0 && needsUnpremul) { + r = SkTPin(r / a, 0.0f, 1.0f); + g = SkTPin(g / a, 0.0f, 1.0f); + b = SkTPin(b / a, 0.0f, 1.0f); + } + return SkColor4f{r, g, b, a}; + } + case kR16G16B16A16_unorm_SkColorType: { + uint64_t value = *this->addr64(x, y); + + float r = ((value)&0xffff) * (1 / 65535.0f), + g = ((value >> 16) & 0xffff) * (1 / 65535.0f), + b = ((value >> 32) & 0xffff) * (1 / 65535.0f), + a = ((value >> 48) & 0xffff) * (1 / 65535.0f); + if (a != 0 && needsUnpremul) { + r *= (1.0f / a); + g *= (1.0f / a); + b *= (1.0f / a); + } + return SkColor4f{r, g, b, a}; + } + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: { + const uint64_t* addr = (const uint64_t*)fPixels + y * (fRowBytes >> 3) + x; + skvx::float4 p4 = SkHalfToFloat_finite_ftz(*addr); + if (p4[3] && needsUnpremul) { + float inva = 1 / p4[3]; + p4 = p4 * skvx::float4(inva, inva, inva, 1); + } + return SkColor4f{p4[0], p4[1], p4[2], p4[3]}; + } + case kRGBA_F32_SkColorType: { + const float* rgba = (const float*)fPixels + 4 * y * (fRowBytes >> 4) + 4 * x; + skvx::float4 p4 = skvx::float4::Load(rgba); + // From here on, just like F16: + if (p4[3] && needsUnpremul) { + float inva = 1 / p4[3]; + p4 = p4 * skvx::float4(inva, inva, inva, 1); + } + return SkColor4f{p4[0], p4[1], p4[2], p4[3]}; + } + case kUnknown_SkColorType: + break; + } + SkDEBUGFAIL(""); + return SkColors::kTransparent; +} + +bool SkPixmap::computeIsOpaque() const { + const int height = this->height(); + const int width = this->width(); + + switch (this->colorType()) { + case kAlpha_8_SkColorType: { + unsigned a = 0xFF; + for (int y = 0; y < height; ++y) { + const uint8_t* row = this->addr8(0, y); + for (int x = 0; x < width; ++x) { + a &= row[x]; + } + if (0xFF != a) { + return false; + } + } + return true; + } + case kA16_unorm_SkColorType: { + unsigned a = 0xFFFF; + for (int y = 0; y < height; ++y) { + const uint16_t* row = this->addr16(0, y); + for (int x = 0; x < width; ++x) { + a &= row[x]; + } + if (0xFFFF != a) { + return false; + } + } + return true; + } + case kA16_float_SkColorType: { + for (int y = 0; y < height; ++y) { + const SkHalf* row = this->addr16(0, y); + for (int x = 0; x < width; ++x) { + if (row[x] < SK_Half1) { + return false; + } + } + } + return true; + } + case kRGB_565_SkColorType: + case kGray_8_SkColorType: + case kR8G8_unorm_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16_float_SkColorType: + case kRGB_888x_SkColorType: + case kRGB_101010x_SkColorType: + case kBGR_101010x_SkColorType: + case kBGR_101010x_XR_SkColorType: + case kR8_unorm_SkColorType: + return true; + case kARGB_4444_SkColorType: { + unsigned c = 0xFFFF; + for (int y = 0; y < height; ++y) { + const SkPMColor16* row = this->addr16(0, y); + for (int x = 0; x < width; ++x) { + c &= row[x]; + } + if (0xF != SkGetPackedA4444(c)) { + return false; + } + } + return true; + } + case kBGRA_8888_SkColorType: + case kRGBA_8888_SkColorType: + case kSRGBA_8888_SkColorType: { + SkPMColor c = (SkPMColor)~0; + for (int y = 0; y < height; ++y) { + const SkPMColor* row = this->addr32(0, y); + for (int x = 0; x < width; ++x) { + c &= row[x]; + } + if (0xFF != SkGetPackedA32(c)) { + return false; + } + } + return true; + } + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: { + const SkHalf* row = (const SkHalf*)this->addr(); + for (int y = 0; y < height; ++y) { + for (int x = 0; x < width; ++x) { + if (row[4 * x + 3] < SK_Half1) { + return false; + } + } + row += this->rowBytes() >> 1; + } + return true; + } + case kRGBA_F32_SkColorType: { + const float* row = (const float*)this->addr(); + for (int y = 0; y < height; ++y) { + for (int x = 0; x < width; ++x) { + if (row[4 * x + 3] < 1.0f) { + return false; + } + } + row += this->rowBytes() >> 2; + } + return true; + } + case kRGBA_1010102_SkColorType: + case kBGRA_1010102_SkColorType: { + uint32_t c = ~0; + for (int y = 0; y < height; ++y) { + const uint32_t* row = this->addr32(0, y); + for (int x = 0; x < width; ++x) { + c &= row[x]; + } + if (0b11 != c >> 30) { + return false; + } + } + return true; + } + case kR16G16B16A16_unorm_SkColorType: { + uint16_t acc = 0xFFFF; + for (int y = 0; y < height; ++y) { + const uint64_t* row = this->addr64(0, y); + for (int x = 0; x < width; ++x) { + acc &= (row[x] >> 48); + } + if (0xFFFF != acc) { + return false; + } + } + return true; + } + case kUnknown_SkColorType: + SkDEBUGFAIL(""); + break; + } + return false; +} + +bool SkPixmap::erase(SkColor color, const SkIRect& subset) const { + return this->erase(SkColor4f::FromColor(color), &subset); +} + +bool SkPixmap::erase(const SkColor4f& color, SkColorSpace* srcCS, const SkIRect* subset) const { + if (this->colorType() == kUnknown_SkColorType) { + return false; + } + + SkIRect clip = this->bounds(); + if (subset && !clip.intersect(*subset)) { + return false; // is this check really needed (i.e. to return false in this case?) + } + + // Erase is meant to simulate drawing in kSRC mode -- which means we have to convert out + // unpremul input into premul (which we always do when we draw). + const auto c = color.premul(); + + const auto dst = SkImageInfo::Make(1, 1, this->colorType(), this->alphaType(), + sk_ref_sp(this->colorSpace())); + const auto src = SkImageInfo::Make(1, 1, kRGBA_F32_SkColorType, kPremul_SkAlphaType, + sk_ref_sp(srcCS)); + + uint64_t dstPixel[2] = {}; // be large enough for our widest config (F32 x 4) + SkASSERT((size_t)dst.bytesPerPixel() <= sizeof(dstPixel)); + + if (!SkConvertPixels(dst, dstPixel, sizeof(dstPixel), src, &c, sizeof(c))) { + return false; + } + + if (this->colorType() == kRGBA_F32_SkColorType) { + SkColor4f dstColor; + memcpy(&dstColor, dstPixel, sizeof(dstColor)); + for (int y = clip.fTop; y < clip.fBottom; ++y) { + SkColor4f* addr = (SkColor4f*)this->writable_addr(clip.fLeft, y); + SK_OPTS_NS::memsetT(addr, dstColor, clip.width()); + } + } else { + using MemSet = void(*)(void*, uint64_t c, int count); + const MemSet procs[] = { + [](void* addr, uint64_t c, int count) { + SkASSERT(c == (uint8_t)c); + SK_OPTS_NS::memsetT((uint8_t*)addr, (uint8_t)c, count); + }, + [](void* addr, uint64_t c, int count) { + SkASSERT(c == (uint16_t)c); + SK_OPTS_NS::memsetT((uint16_t*)addr, (uint16_t)c, count); + }, + [](void* addr, uint64_t c, int count) { + SkASSERT(c == (uint32_t)c); + SK_OPTS_NS::memsetT((uint32_t*)addr, (uint32_t)c, count); + }, + [](void* addr, uint64_t c, int count) { + SK_OPTS_NS::memsetT((uint64_t*)addr, c, count); + }, + }; + + unsigned shift = SkColorTypeShiftPerPixel(this->colorType()); + SkASSERT(shift < std::size(procs)); + auto proc = procs[shift]; + + for (int y = clip.fTop; y < clip.fBottom; ++y) { + proc(this->writable_addr(clip.fLeft, y), dstPixel[0], clip.width()); + } + } + return true; +} diff --git a/gfx/skia/skia/src/core/SkPixmapDraw.cpp b/gfx/skia/skia/src/core/SkPixmapDraw.cpp new file mode 100644 index 0000000000..ff4c7ba379 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPixmapDraw.cpp @@ -0,0 +1,87 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * This file contains implementations of SkPixmap methods which require the CPU backend. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkShader.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTileMode.h" +#include "src/shaders/SkImageShader.h" + +#include + +struct SkSamplingOptions; + +bool SkPixmap::scalePixels(const SkPixmap& actualDst, const SkSamplingOptions& sampling) const { + // We may need to tweak how we interpret these just a little below, so we make copies. + SkPixmap src = *this, + dst = actualDst; + + // Can't do anthing with empty src or dst + if (src.width() <= 0 || src.height() <= 0 || + dst.width() <= 0 || dst.height() <= 0) { + return false; + } + + // no scaling involved? + if (src.width() == dst.width() && src.height() == dst.height()) { + return src.readPixels(dst); + } + + // If src and dst are both unpremul, we'll fake the source out to appear as if premul, + // and mark the destination as opaque. This odd combination allows us to scale unpremul + // pixels without ever premultiplying them (perhaps losing information in the color channels). + // This is an idiosyncratic feature of scalePixels(), and is tested by scalepixels_unpremul GM. + bool clampAsIfUnpremul = false; + if (src.alphaType() == kUnpremul_SkAlphaType && + dst.alphaType() == kUnpremul_SkAlphaType) { + src.reset(src.info().makeAlphaType(kPremul_SkAlphaType), src.addr(), src.rowBytes()); + dst.reset(dst.info().makeAlphaType(kOpaque_SkAlphaType), dst.addr(), dst.rowBytes()); + + // We'll need to tell the image shader to clamp to [0,1] instead of the + // usual [0,a] when using a bicubic scaling (kHigh_SkFilterQuality). + clampAsIfUnpremul = true; + } + + SkBitmap bitmap; + if (!bitmap.installPixels(src)) { + return false; + } + bitmap.setImmutable(); // Don't copy when we create an image. + + SkMatrix scale = SkMatrix::RectToRect(SkRect::Make(src.bounds()), SkRect::Make(dst.bounds())); + + sk_sp shader = SkImageShader::Make(bitmap.asImage(), + SkTileMode::kClamp, + SkTileMode::kClamp, + sampling, + &scale, + clampAsIfUnpremul); + + sk_sp surface = SkSurface::MakeRasterDirect(dst.info(), + dst.writable_addr(), + dst.rowBytes()); + if (!shader || !surface) { + return false; + } + + SkPaint paint; + paint.setBlendMode(SkBlendMode::kSrc); + paint.setShader(std::move(shader)); + surface->getCanvas()->drawPaint(paint); + return true; +} diff --git a/gfx/skia/skia/src/core/SkPoint.cpp b/gfx/skia/skia/src/core/SkPoint.cpp new file mode 100644 index 0000000000..8cf6499a7b --- /dev/null +++ b/gfx/skia/skia/src/core/SkPoint.cpp @@ -0,0 +1,169 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkFloatingPoint.h" +#include "src/core/SkPointPriv.h" + +#include + +/////////////////////////////////////////////////////////////////////////////// + +void SkPoint::scale(SkScalar scale, SkPoint* dst) const { + SkASSERT(dst); + dst->set(fX * scale, fY * scale); +} + +bool SkPoint::normalize() { + return this->setLength(fX, fY, SK_Scalar1); +} + +bool SkPoint::setNormalize(SkScalar x, SkScalar y) { + return this->setLength(x, y, SK_Scalar1); +} + +bool SkPoint::setLength(SkScalar length) { + return this->setLength(fX, fY, length); +} + +/* + * We have to worry about 2 tricky conditions: + * 1. underflow of mag2 (compared against nearlyzero^2) + * 2. overflow of mag2 (compared w/ isfinite) + * + * If we underflow, we return false. If we overflow, we compute again using + * doubles, which is much slower (3x in a desktop test) but will not overflow. + */ +template bool set_point_length(SkPoint* pt, float x, float y, float length, + float* orig_length = nullptr) { + SkASSERT(!use_rsqrt || (orig_length == nullptr)); + + // our mag2 step overflowed to infinity, so use doubles instead. + // much slower, but needed when x or y are very large, other wise we + // divide by inf. and return (0,0) vector. + double xx = x; + double yy = y; + double dmag = sqrt(xx * xx + yy * yy); + double dscale = sk_ieee_double_divide(length, dmag); + x *= dscale; + y *= dscale; + // check if we're not finite, or we're zero-length + if (!sk_float_isfinite(x) || !sk_float_isfinite(y) || (x == 0 && y == 0)) { + pt->set(0, 0); + return false; + } + float mag = 0; + if (orig_length) { + mag = sk_double_to_float(dmag); + } + pt->set(x, y); + if (orig_length) { + *orig_length = mag; + } + return true; +} + +SkScalar SkPoint::Normalize(SkPoint* pt) { + float mag; + if (set_point_length(pt, pt->fX, pt->fY, 1.0f, &mag)) { + return mag; + } + return 0; +} + +SkScalar SkPoint::Length(SkScalar dx, SkScalar dy) { + float mag2 = dx * dx + dy * dy; + if (SkScalarIsFinite(mag2)) { + return sk_float_sqrt(mag2); + } else { + double xx = dx; + double yy = dy; + return sk_double_to_float(sqrt(xx * xx + yy * yy)); + } +} + +bool SkPoint::setLength(float x, float y, float length) { + return set_point_length(this, x, y, length); +} + +bool SkPointPriv::SetLengthFast(SkPoint* pt, float length) { + return set_point_length(pt, pt->fX, pt->fY, length); +} + + +/////////////////////////////////////////////////////////////////////////////// + +SkScalar SkPointPriv::DistanceToLineBetweenSqd(const SkPoint& pt, const SkPoint& a, + const SkPoint& b, + Side* side) { + + SkVector u = b - a; + SkVector v = pt - a; + + SkScalar uLengthSqd = LengthSqd(u); + SkScalar det = u.cross(v); + if (side) { + SkASSERT(-1 == kLeft_Side && + 0 == kOn_Side && + 1 == kRight_Side); + *side = (Side) SkScalarSignAsInt(det); + } + SkScalar temp = sk_ieee_float_divide(det, uLengthSqd); + temp *= det; + // It's possible we have a degenerate line vector, or we're so far away it looks degenerate + // In this case, return squared distance to point A. + if (!SkScalarIsFinite(temp)) { + return LengthSqd(v); + } + return temp; +} + +SkScalar SkPointPriv::DistanceToLineSegmentBetweenSqd(const SkPoint& pt, const SkPoint& a, + const SkPoint& b) { + // See comments to distanceToLineBetweenSqd. If the projection of c onto + // u is between a and b then this returns the same result as that + // function. Otherwise, it returns the distance to the closer of a and + // b. Let the projection of v onto u be v'. There are three cases: + // 1. v' points opposite to u. c is not between a and b and is closer + // to a than b. + // 2. v' points along u and has magnitude less than y. c is between + // a and b and the distance to the segment is the same as distance + // to the line ab. + // 3. v' points along u and has greater magnitude than u. c is not + // not between a and b and is closer to b than a. + // v' = (u dot v) * u / |u|. So if (u dot v)/|u| is less than zero we're + // in case 1. If (u dot v)/|u| is > |u| we are in case 3. Otherwise + // we're in case 2. We actually compare (u dot v) to 0 and |u|^2 to + // avoid a sqrt to compute |u|. + + SkVector u = b - a; + SkVector v = pt - a; + + SkScalar uLengthSqd = LengthSqd(u); + SkScalar uDotV = SkPoint::DotProduct(u, v); + + // closest point is point A + if (uDotV <= 0) { + return LengthSqd(v); + // closest point is point B + } else if (uDotV > uLengthSqd) { + return DistanceToSqd(b, pt); + // closest point is inside segment + } else { + SkScalar det = u.cross(v); + SkScalar temp = sk_ieee_float_divide(det, uLengthSqd); + temp *= det; + // It's possible we have a degenerate segment, or we're so far away it looks degenerate + // In this case, return squared distance to point A. + if (!SkScalarIsFinite(temp)) { + return LengthSqd(v); + } + return temp; + } +} diff --git a/gfx/skia/skia/src/core/SkPoint3.cpp b/gfx/skia/skia/src/core/SkPoint3.cpp new file mode 100644 index 0000000000..901e90ee6f --- /dev/null +++ b/gfx/skia/skia/src/core/SkPoint3.cpp @@ -0,0 +1,76 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPoint3.h" + +// Returns the square of the Euclidian distance to (x,y,z). +static inline float get_length_squared(float x, float y, float z) { + return x * x + y * y + z * z; +} + +// Calculates the square of the Euclidian distance to (x,y,z) and stores it in +// *lengthSquared. Returns true if the distance is judged to be "nearly zero". +// +// This logic is encapsulated in a helper method to make it explicit that we +// always perform this check in the same manner, to avoid inconsistencies +// (see http://code.google.com/p/skia/issues/detail?id=560 ). +static inline bool is_length_nearly_zero(float x, float y, float z, float *lengthSquared) { + *lengthSquared = get_length_squared(x, y, z); + return *lengthSquared <= (SK_ScalarNearlyZero * SK_ScalarNearlyZero); +} + +SkScalar SkPoint3::Length(SkScalar x, SkScalar y, SkScalar z) { + float magSq = get_length_squared(x, y, z); + if (SkScalarIsFinite(magSq)) { + return sk_float_sqrt(magSq); + } else { + double xx = x; + double yy = y; + double zz = z; + return (float)sqrt(xx * xx + yy * yy + zz * zz); + } +} + +/* + * We have to worry about 2 tricky conditions: + * 1. underflow of magSq (compared against nearlyzero^2) + * 2. overflow of magSq (compared w/ isfinite) + * + * If we underflow, we return false. If we overflow, we compute again using + * doubles, which is much slower (3x in a desktop test) but will not overflow. + */ +bool SkPoint3::normalize() { + float magSq; + if (is_length_nearly_zero(fX, fY, fZ, &magSq)) { + this->set(0, 0, 0); + return false; + } + // sqrtf does not provide enough precision; since sqrt takes a double, + // there's no additional penalty to storing invScale in a double + double invScale; + if (sk_float_isfinite(magSq)) { + invScale = magSq; + } else { + // our magSq step overflowed to infinity, so use doubles instead. + // much slower, but needed when x, y or z is very large, otherwise we + // divide by inf. and return (0,0,0) vector. + double xx = fX; + double yy = fY; + double zz = fZ; + invScale = xx * xx + yy * yy + zz * zz; + } + // using a float instead of a double for scale loses too much precision + double scale = 1 / sqrt(invScale); + fX *= scale; + fY *= scale; + fZ *= scale; + if (!sk_float_isfinite(fX) || !sk_float_isfinite(fY) || !sk_float_isfinite(fZ)) { + this->set(0, 0, 0); + return false; + } + return true; +} diff --git a/gfx/skia/skia/src/core/SkPointPriv.h b/gfx/skia/skia/src/core/SkPointPriv.h new file mode 100644 index 0000000000..c8a6d520e0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkPointPriv.h @@ -0,0 +1,127 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPointPriv_DEFINED +#define SkPointPriv_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" + +class SkPointPriv { +public: + enum Side { + kLeft_Side = -1, + kOn_Side = 0, + kRight_Side = 1, + }; + + static bool AreFinite(const SkPoint array[], int count) { + return SkScalarsAreFinite(&array[0].fX, count << 1); + } + + static const SkScalar* AsScalars(const SkPoint& pt) { return &pt.fX; } + + static bool CanNormalize(SkScalar dx, SkScalar dy) { + return SkScalarsAreFinite(dx, dy) && (dx || dy); + } + + static SkScalar DistanceToLineBetweenSqd(const SkPoint& pt, const SkPoint& a, + const SkPoint& b, Side* side = nullptr); + + static SkScalar DistanceToLineBetween(const SkPoint& pt, const SkPoint& a, + const SkPoint& b, Side* side = nullptr) { + return SkScalarSqrt(DistanceToLineBetweenSqd(pt, a, b, side)); + } + + static SkScalar DistanceToLineSegmentBetweenSqd(const SkPoint& pt, const SkPoint& a, + const SkPoint& b); + + static SkScalar DistanceToLineSegmentBetween(const SkPoint& pt, const SkPoint& a, + const SkPoint& b) { + return SkScalarSqrt(DistanceToLineSegmentBetweenSqd(pt, a, b)); + } + + static SkScalar DistanceToSqd(const SkPoint& pt, const SkPoint& a) { + SkScalar dx = pt.fX - a.fX; + SkScalar dy = pt.fY - a.fY; + return dx * dx + dy * dy; + } + + static bool EqualsWithinTolerance(const SkPoint& p1, const SkPoint& p2) { + return !CanNormalize(p1.fX - p2.fX, p1.fY - p2.fY); + } + + static bool EqualsWithinTolerance(const SkPoint& pt, const SkPoint& p, SkScalar tol) { + return SkScalarNearlyZero(pt.fX - p.fX, tol) + && SkScalarNearlyZero(pt.fY - p.fY, tol); + } + + static SkScalar LengthSqd(const SkPoint& pt) { + return SkPoint::DotProduct(pt, pt); + } + + static void Negate(SkIPoint& pt) { + pt.fX = -pt.fX; + pt.fY = -pt.fY; + } + + static void RotateCCW(const SkPoint& src, SkPoint* dst) { + // use a tmp in case src == dst + SkScalar tmp = src.fX; + dst->fX = src.fY; + dst->fY = -tmp; + } + + static void RotateCCW(SkPoint* pt) { + RotateCCW(*pt, pt); + } + + static void RotateCW(const SkPoint& src, SkPoint* dst) { + // use a tmp in case src == dst + SkScalar tmp = src.fX; + dst->fX = -src.fY; + dst->fY = tmp; + } + + static void RotateCW(SkPoint* pt) { + RotateCW(*pt, pt); + } + + static bool SetLengthFast(SkPoint* pt, float length); + + static SkPoint MakeOrthog(const SkPoint& vec, Side side = kLeft_Side) { + SkASSERT(side == kRight_Side || side == kLeft_Side); + return (side == kRight_Side) ? SkPoint{-vec.fY, vec.fX} : SkPoint{vec.fY, -vec.fX}; + } + + // counter-clockwise fan + static void SetRectFan(SkPoint v[], SkScalar l, SkScalar t, SkScalar r, SkScalar b, + size_t stride) { + SkASSERT(stride >= sizeof(SkPoint)); + + ((SkPoint*)((intptr_t)v + 0 * stride))->set(l, t); + ((SkPoint*)((intptr_t)v + 1 * stride))->set(l, b); + ((SkPoint*)((intptr_t)v + 2 * stride))->set(r, b); + ((SkPoint*)((intptr_t)v + 3 * stride))->set(r, t); + } + + // tri strip with two counter-clockwise triangles + static void SetRectTriStrip(SkPoint v[], SkScalar l, SkScalar t, SkScalar r, SkScalar b, + size_t stride) { + SkASSERT(stride >= sizeof(SkPoint)); + + ((SkPoint*)((intptr_t)v + 0 * stride))->set(l, t); + ((SkPoint*)((intptr_t)v + 1 * stride))->set(l, b); + ((SkPoint*)((intptr_t)v + 2 * stride))->set(r, t); + ((SkPoint*)((intptr_t)v + 3 * stride))->set(r, b); + } + static void SetRectTriStrip(SkPoint v[], const SkRect& rect, size_t stride) { + SetRectTriStrip(v, rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, stride); + } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkPromiseImageTexture.cpp b/gfx/skia/skia/src/core/SkPromiseImageTexture.cpp new file mode 100644 index 0000000000..7912c3390b --- /dev/null +++ b/gfx/skia/skia/src/core/SkPromiseImageTexture.cpp @@ -0,0 +1,19 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPromiseImageTexture.h" + +#if defined(SK_GANESH) + +SkPromiseImageTexture::SkPromiseImageTexture(const GrBackendTexture& backendTexture) { + SkASSERT(backendTexture.isValid()); + fBackendTexture = backendTexture; +} + +SkPromiseImageTexture::~SkPromiseImageTexture() {} + +#endif // defined(SK_GANESH) diff --git a/gfx/skia/skia/src/core/SkPtrRecorder.cpp b/gfx/skia/skia/src/core/SkPtrRecorder.cpp new file mode 100644 index 0000000000..eacd45546b --- /dev/null +++ b/gfx/skia/skia/src/core/SkPtrRecorder.cpp @@ -0,0 +1,73 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/base/SkTSearch.h" +#include "src/core/SkPtrRecorder.h" + +void SkPtrSet::reset() { + Pair* p = fList.begin(); + Pair* stop = fList.end(); + while (p < stop) { + this->decPtr(p->fPtr); + p += 1; + } + fList.reset(); +} + +bool SkPtrSet::Less(const Pair& a, const Pair& b) { + return (char*)a.fPtr < (char*)b.fPtr; +} + +uint32_t SkPtrSet::find(void* ptr) const { + if (nullptr == ptr) { + return 0; + } + + int count = fList.size(); + Pair pair; + pair.fPtr = ptr; + + int index = SkTSearch(fList.begin(), count, pair, sizeof(pair)); + if (index < 0) { + return 0; + } + return fList[index].fIndex; +} + +uint32_t SkPtrSet::add(void* ptr) { + if (nullptr == ptr) { + return 0; + } + + int count = fList.size(); + Pair pair; + pair.fPtr = ptr; + + int index = SkTSearch(fList.begin(), count, pair, sizeof(pair)); + if (index < 0) { + index = ~index; // turn it back into an index for insertion + this->incPtr(ptr); + pair.fIndex = count + 1; + *fList.insert(index) = pair; + return count + 1; + } else { + return fList[index].fIndex; + } +} + +void SkPtrSet::copyToArray(void* array[]) const { + int count = fList.size(); + if (count > 0) { + SkASSERT(array); + const Pair* p = fList.begin(); + // p->fIndex is base-1, so we need to subtract to find its slot + for (int i = 0; i < count; i++) { + int index = p[i].fIndex - 1; + SkASSERT((unsigned)index < (unsigned)count); + array[index] = p[i].fPtr; + } + } +} diff --git a/gfx/skia/skia/src/core/SkPtrRecorder.h b/gfx/skia/skia/src/core/SkPtrRecorder.h new file mode 100644 index 0000000000..8179f2ff0c --- /dev/null +++ b/gfx/skia/skia/src/core/SkPtrRecorder.h @@ -0,0 +1,171 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkPtrSet_DEFINED +#define SkPtrSet_DEFINED + +#include "include/core/SkFlattenable.h" +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkTDArray.h" + +/** + * Maintains a set of ptrs, assigning each a unique ID [1...N]. Duplicate ptrs + * return the same ID (since its a set). Subclasses can override inPtr() + * and decPtr(). incPtr() is called each time a unique ptr is added ot the + * set. decPtr() is called on each ptr when the set is destroyed or reset. + */ +class SkPtrSet : public SkRefCnt { +public: + + + /** + * Search for the specified ptr in the set. If it is found, return its + * 32bit ID [1..N], or if not found, return 0. Always returns 0 for nullptr. + */ + uint32_t find(void*) const; + + /** + * Add the specified ptr to the set, returning a unique 32bit ID for it + * [1...N]. Duplicate ptrs will return the same ID. + * + * If the ptr is nullptr, it is not added, and 0 is returned. + */ + uint32_t add(void*); + + /** + * Return the number of (non-null) ptrs in the set. + */ + int count() const { return fList.size(); } + + /** + * Copy the ptrs in the set into the specified array (allocated by the + * caller). The ptrs are assgined to the array based on their corresponding + * ID. e.g. array[ptr.ID - 1] = ptr. + * + * incPtr() and decPtr() are not called during this operation. + */ + void copyToArray(void* array[]) const; + + /** + * Call decPtr() on each ptr in the set, and the reset the size of the set + * to 0. + */ + void reset(); + + /** + * Set iterator. + */ + class Iter { + public: + Iter(const SkPtrSet& set) + : fSet(set) + , fIndex(0) {} + + /** + * Return the next ptr in the set or null if the end was reached. + */ + void* next() { + return fIndex < fSet.fList.size() ? fSet.fList[fIndex++].fPtr : nullptr; + } + + private: + const SkPtrSet& fSet; + int fIndex; + }; + +protected: + virtual void incPtr(void*) {} + virtual void decPtr(void*) {} + +private: + struct Pair { + void* fPtr; // never nullptr + uint32_t fIndex; // 1...N + }; + + // we store the ptrs in sorted-order (using Cmp) so that we can efficiently + // detect duplicates when add() is called. Hence we need to store the + // ptr and its ID/fIndex explicitly, since the ptr's position in the array + // is not related to its "index". + SkTDArray fList; + + static bool Less(const Pair& a, const Pair& b); + + using INHERITED = SkRefCnt; +}; + +/** + * Templated wrapper for SkPtrSet, just meant to automate typecasting + * parameters to and from void* (which the base class expects). + */ +template class SkTPtrSet : public SkPtrSet { +public: + uint32_t find(T ptr) { + return this->INHERITED::find((void*)ptr); + } + uint32_t add(T ptr) { + return this->INHERITED::add((void*)ptr); + } + + void copyToArray(T* array) const { + this->INHERITED::copyToArray((void**)array); + } + +private: + using INHERITED = SkPtrSet; +}; + +/** + * Subclass of SkTPtrSet specialed to call ref() and unref() when the + * base class's incPtr() and decPtr() are called. This makes it a valid owner + * of each ptr, which is released when the set is reset or destroyed. + */ +class SkRefCntSet : public SkTPtrSet { +public: + ~SkRefCntSet() override; + +protected: + // overrides + void incPtr(void*) override; + void decPtr(void*) override; +}; + +class SkFactorySet : public SkTPtrSet {}; + +/** + * Similar to SkFactorySet, but only allows Factorys that have registered names. + * Also has a function to return the next added Factory's name. + */ +class SkNamedFactorySet : public SkRefCnt { +public: + + + SkNamedFactorySet(); + + /** + * Find the specified Factory in the set. If it is not already in the set, + * and has registered its name, add it to the set, and return its index. + * If the Factory has no registered name, return 0. + */ + uint32_t find(SkFlattenable::Factory); + + /** + * If new Factorys have been added to the set, return the name of the first + * Factory added after the Factory name returned by the last call to this + * function. + */ + const char* getNextAddedFactoryName(); +private: + int fNextAddedFactory; + SkFactorySet fFactorySet; + SkTDArray fNames; + + using INHERITED = SkRefCnt; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkQuadClipper.cpp b/gfx/skia/skia/src/core/SkQuadClipper.cpp new file mode 100644 index 0000000000..d265635b48 --- /dev/null +++ b/gfx/skia/skia/src/core/SkQuadClipper.cpp @@ -0,0 +1,117 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkGeometry.h" +#include "src/core/SkQuadClipper.h" + +#include + +SkQuadClipper::SkQuadClipper() { + fClip.setEmpty(); +} + +void SkQuadClipper::setClip(const SkIRect& clip) { + // conver to scalars, since that's where we'll see the points + fClip.set(clip); +} + +/////////////////////////////////////////////////////////////////////////////// + +static bool chopMonoQuadAt(SkScalar c0, SkScalar c1, SkScalar c2, + SkScalar target, SkScalar* t) { + /* Solve F(t) = y where F(t) := [0](1-t)^2 + 2[1]t(1-t) + [2]t^2 + * We solve for t, using quadratic equation, hence we have to rearrange + * our cooefficents to look like At^2 + Bt + C + */ + SkScalar A = c0 - c1 - c1 + c2; + SkScalar B = 2*(c1 - c0); + SkScalar C = c0 - target; + + SkScalar roots[2]; // we only expect one, but make room for 2 for safety + int count = SkFindUnitQuadRoots(A, B, C, roots); + if (count) { + *t = roots[0]; + return true; + } + return false; +} + +static bool chopMonoQuadAtY(SkPoint pts[3], SkScalar y, SkScalar* t) { + return chopMonoQuadAt(pts[0].fY, pts[1].fY, pts[2].fY, y, t); +} + +/////////////////////////////////////////////////////////////////////////////// + +/* If we somehow returned the fact that we had to flip the pts in Y, we could + communicate that to setQuadratic, and then avoid having to flip it back + here (only to have setQuadratic do the flip again) + */ +bool SkQuadClipper::clipQuad(const SkPoint srcPts[3], SkPoint dst[3]) { + bool reverse; + + // we need the data to be monotonically increasing in Y + if (srcPts[0].fY > srcPts[2].fY) { + dst[0] = srcPts[2]; + dst[1] = srcPts[1]; + dst[2] = srcPts[0]; + reverse = true; + } else { + memcpy(dst, srcPts, 3 * sizeof(SkPoint)); + reverse = false; + } + + // are we completely above or below + const SkScalar ctop = fClip.fTop; + const SkScalar cbot = fClip.fBottom; + if (dst[2].fY <= ctop || dst[0].fY >= cbot) { + return false; + } + + SkScalar t; + SkPoint tmp[5]; // for SkChopQuadAt + + // are we partially above + if (dst[0].fY < ctop) { + if (chopMonoQuadAtY(dst, ctop, &t)) { + // take the 2nd chopped quad + SkChopQuadAt(dst, tmp, t); + dst[0] = tmp[2]; + dst[1] = tmp[3]; + } else { + // if chopMonoQuadAtY failed, then we may have hit inexact numerics + // so we just clamp against the top + for (int i = 0; i < 3; i++) { + if (dst[i].fY < ctop) { + dst[i].fY = ctop; + } + } + } + } + + // are we partially below + if (dst[2].fY > cbot) { + if (chopMonoQuadAtY(dst, cbot, &t)) { + SkChopQuadAt(dst, tmp, t); + dst[1] = tmp[1]; + dst[2] = tmp[2]; + } else { + // if chopMonoQuadAtY failed, then we may have hit inexact numerics + // so we just clamp against the bottom + for (int i = 0; i < 3; i++) { + if (dst[i].fY > cbot) { + dst[i].fY = cbot; + } + } + } + } + + if (reverse) { + using std::swap; + swap(dst[0], dst[2]); + } + return true; +} diff --git a/gfx/skia/skia/src/core/SkQuadClipper.h b/gfx/skia/skia/src/core/SkQuadClipper.h new file mode 100644 index 0000000000..c3f5d63c8a --- /dev/null +++ b/gfx/skia/skia/src/core/SkQuadClipper.h @@ -0,0 +1,69 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkQuadClipper_DEFINED +#define SkQuadClipper_DEFINED + +#include "include/core/SkPath.h" + +/** This class is initialized with a clip rectangle, and then can be fed quads, + which must already be monotonic in Y. + + In the future, it might return a series of segments, allowing it to clip + also in X, to ensure that all segments fit in a finite coordinate system. + */ +class SkQuadClipper { +public: + SkQuadClipper(); + + void setClip(const SkIRect& clip); + + bool clipQuad(const SkPoint src[3], SkPoint dst[3]); + +private: + SkRect fClip; +}; + +/** Iterator that returns the clipped segements of a quad clipped to a rect. + The segments will be either lines or quads (based on SkPath::Verb), and + will all be monotonic in Y + */ +class SkQuadClipper2 { +public: + bool clipQuad(const SkPoint pts[3], const SkRect& clip); + bool clipCubic(const SkPoint pts[4], const SkRect& clip); + + SkPath::Verb next(SkPoint pts[]); + +private: + SkPoint* fCurrPoint; + SkPath::Verb* fCurrVerb; + + enum { + kMaxVerbs = 13, + kMaxPoints = 32 + }; + SkPoint fPoints[kMaxPoints]; + SkPath::Verb fVerbs[kMaxVerbs]; + + void clipMonoQuad(const SkPoint srcPts[3], const SkRect& clip); + void clipMonoCubic(const SkPoint srcPts[4], const SkRect& clip); + void appendVLine(SkScalar x, SkScalar y0, SkScalar y1, bool reverse); + void appendQuad(const SkPoint pts[3], bool reverse); + void appendCubic(const SkPoint pts[4], bool reverse); +}; + +#ifdef SK_DEBUG + void sk_assert_monotonic_x(const SkPoint pts[], int count); + void sk_assert_monotonic_y(const SkPoint pts[], int count); +#else + #define sk_assert_monotonic_x(pts, count) + #define sk_assert_monotonic_y(pts, count) +#endif + +#endif diff --git a/gfx/skia/skia/src/core/SkRRect.cpp b/gfx/skia/skia/src/core/SkRRect.cpp new file mode 100644 index 0000000000..f5668056e7 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRRect.cpp @@ -0,0 +1,917 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRRect.h" + +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkFloatingPoint.h" +#include "src/base/SkBuffer.h" +#include "src/core/SkRRectPriv.h" +#include "src/core/SkRectPriv.h" +#include "src/core/SkScaleToSides.h" +#include "src/core/SkStringUtils.h" + +#include +#include +#include + +/////////////////////////////////////////////////////////////////////////////// + +void SkRRect::setOval(const SkRect& oval) { + if (!this->initializeRect(oval)) { + return; + } + + SkScalar xRad = SkRectPriv::HalfWidth(fRect); + SkScalar yRad = SkRectPriv::HalfHeight(fRect); + + if (xRad == 0.0f || yRad == 0.0f) { + // All the corners will be square + memset(fRadii, 0, sizeof(fRadii)); + fType = kRect_Type; + } else { + for (int i = 0; i < 4; ++i) { + fRadii[i].set(xRad, yRad); + } + fType = kOval_Type; + } + + SkASSERT(this->isValid()); +} + +void SkRRect::setRectXY(const SkRect& rect, SkScalar xRad, SkScalar yRad) { + if (!this->initializeRect(rect)) { + return; + } + + if (!SkScalarsAreFinite(xRad, yRad)) { + xRad = yRad = 0; // devolve into a simple rect + } + + if (fRect.width() < xRad+xRad || fRect.height() < yRad+yRad) { + // At most one of these two divides will be by zero, and neither numerator is zero. + SkScalar scale = std::min(sk_ieee_float_divide(fRect. width(), xRad + xRad), + sk_ieee_float_divide(fRect.height(), yRad + yRad)); + SkASSERT(scale < SK_Scalar1); + xRad *= scale; + yRad *= scale; + } + + if (xRad <= 0 || yRad <= 0) { + // all corners are square in this case + this->setRect(rect); + return; + } + + for (int i = 0; i < 4; ++i) { + fRadii[i].set(xRad, yRad); + } + fType = kSimple_Type; + if (xRad >= SkScalarHalf(fRect.width()) && yRad >= SkScalarHalf(fRect.height())) { + fType = kOval_Type; + // TODO: assert that all the x&y radii are already W/2 & H/2 + } + + SkASSERT(this->isValid()); +} + +void SkRRect::setNinePatch(const SkRect& rect, SkScalar leftRad, SkScalar topRad, + SkScalar rightRad, SkScalar bottomRad) { + if (!this->initializeRect(rect)) { + return; + } + + const SkScalar array[4] = { leftRad, topRad, rightRad, bottomRad }; + if (!SkScalarsAreFinite(array, 4)) { + this->setRect(rect); // devolve into a simple rect + return; + } + + leftRad = std::max(leftRad, 0.0f); + topRad = std::max(topRad, 0.0f); + rightRad = std::max(rightRad, 0.0f); + bottomRad = std::max(bottomRad, 0.0f); + + SkScalar scale = SK_Scalar1; + if (leftRad + rightRad > fRect.width()) { + scale = fRect.width() / (leftRad + rightRad); + } + if (topRad + bottomRad > fRect.height()) { + scale = std::min(scale, fRect.height() / (topRad + bottomRad)); + } + + if (scale < SK_Scalar1) { + leftRad *= scale; + topRad *= scale; + rightRad *= scale; + bottomRad *= scale; + } + + if (leftRad == rightRad && topRad == bottomRad) { + if (leftRad >= SkScalarHalf(fRect.width()) && topRad >= SkScalarHalf(fRect.height())) { + fType = kOval_Type; + } else if (0 == leftRad || 0 == topRad) { + // If the left and (by equality check above) right radii are zero then it is a rect. + // Same goes for top/bottom. + fType = kRect_Type; + leftRad = 0; + topRad = 0; + rightRad = 0; + bottomRad = 0; + } else { + fType = kSimple_Type; + } + } else { + fType = kNinePatch_Type; + } + + fRadii[kUpperLeft_Corner].set(leftRad, topRad); + fRadii[kUpperRight_Corner].set(rightRad, topRad); + fRadii[kLowerRight_Corner].set(rightRad, bottomRad); + fRadii[kLowerLeft_Corner].set(leftRad, bottomRad); + + SkASSERT(this->isValid()); +} + +// These parameters intentionally double. Apropos crbug.com/463920, if one of the +// radii is huge while the other is small, single precision math can completely +// miss the fact that a scale is required. +static double compute_min_scale(double rad1, double rad2, double limit, double curMin) { + if ((rad1 + rad2) > limit) { + return std::min(curMin, limit / (rad1 + rad2)); + } + return curMin; +} + +static bool clamp_to_zero(SkVector radii[4]) { + bool allCornersSquare = true; + + // Clamp negative radii to zero + for (int i = 0; i < 4; ++i) { + if (radii[i].fX <= 0 || radii[i].fY <= 0) { + // In this case we are being a little fast & loose. Since one of + // the radii is 0 the corner is square. However, the other radii + // could still be non-zero and play in the global scale factor + // computation. + radii[i].fX = 0; + radii[i].fY = 0; + } else { + allCornersSquare = false; + } + } + + return allCornersSquare; +} + +void SkRRect::setRectRadii(const SkRect& rect, const SkVector radii[4]) { + if (!this->initializeRect(rect)) { + return; + } + + if (!SkScalarsAreFinite(&radii[0].fX, 8)) { + this->setRect(rect); // devolve into a simple rect + return; + } + + memcpy(fRadii, radii, sizeof(fRadii)); + + if (clamp_to_zero(fRadii)) { + this->setRect(rect); + return; + } + + this->scaleRadii(); + + if (!this->isValid()) { + this->setRect(rect); + return; + } +} + +bool SkRRect::initializeRect(const SkRect& rect) { + // Check this before sorting because sorting can hide nans. + if (!rect.isFinite()) { + *this = SkRRect(); + return false; + } + fRect = rect.makeSorted(); + if (fRect.isEmpty()) { + memset(fRadii, 0, sizeof(fRadii)); + fType = kEmpty_Type; + return false; + } + return true; +} + +// If we can't distinguish one of the radii relative to the other, force it to zero so it +// doesn't confuse us later. See crbug.com/850350 +// +static void flush_to_zero(SkScalar& a, SkScalar& b) { + SkASSERT(a >= 0); + SkASSERT(b >= 0); + if (a + b == a) { + b = 0; + } else if (a + b == b) { + a = 0; + } +} + +bool SkRRect::scaleRadii() { + // Proportionally scale down all radii to fit. Find the minimum ratio + // of a side and the radii on that side (for all four sides) and use + // that to scale down _all_ the radii. This algorithm is from the + // W3 spec (http://www.w3.org/TR/css3-background/) section 5.5 - Overlapping + // Curves: + // "Let f = min(Li/Si), where i is one of { top, right, bottom, left }, + // Si is the sum of the two corresponding radii of the corners on side i, + // and Ltop = Lbottom = the width of the box, + // and Lleft = Lright = the height of the box. + // If f < 1, then all corner radii are reduced by multiplying them by f." + double scale = 1.0; + + // The sides of the rectangle may be larger than a float. + double width = (double)fRect.fRight - (double)fRect.fLeft; + double height = (double)fRect.fBottom - (double)fRect.fTop; + scale = compute_min_scale(fRadii[0].fX, fRadii[1].fX, width, scale); + scale = compute_min_scale(fRadii[1].fY, fRadii[2].fY, height, scale); + scale = compute_min_scale(fRadii[2].fX, fRadii[3].fX, width, scale); + scale = compute_min_scale(fRadii[3].fY, fRadii[0].fY, height, scale); + + flush_to_zero(fRadii[0].fX, fRadii[1].fX); + flush_to_zero(fRadii[1].fY, fRadii[2].fY); + flush_to_zero(fRadii[2].fX, fRadii[3].fX); + flush_to_zero(fRadii[3].fY, fRadii[0].fY); + + if (scale < 1.0) { + SkScaleToSides::AdjustRadii(width, scale, &fRadii[0].fX, &fRadii[1].fX); + SkScaleToSides::AdjustRadii(height, scale, &fRadii[1].fY, &fRadii[2].fY); + SkScaleToSides::AdjustRadii(width, scale, &fRadii[2].fX, &fRadii[3].fX); + SkScaleToSides::AdjustRadii(height, scale, &fRadii[3].fY, &fRadii[0].fY); + } + + // adjust radii may set x or y to zero; set companion to zero as well + clamp_to_zero(fRadii); + + // May be simple, oval, or complex, or become a rect/empty if the radii adjustment made them 0 + this->computeType(); + + // TODO: Why can't we assert this here? + //SkASSERT(this->isValid()); + + return scale < 1.0; +} + +// This method determines if a point known to be inside the RRect's bounds is +// inside all the corners. +bool SkRRect::checkCornerContainment(SkScalar x, SkScalar y) const { + SkPoint canonicalPt; // (x,y) translated to one of the quadrants + int index; + + if (kOval_Type == this->type()) { + canonicalPt.set(x - fRect.centerX(), y - fRect.centerY()); + index = kUpperLeft_Corner; // any corner will do in this case + } else { + if (x < fRect.fLeft + fRadii[kUpperLeft_Corner].fX && + y < fRect.fTop + fRadii[kUpperLeft_Corner].fY) { + // UL corner + index = kUpperLeft_Corner; + canonicalPt.set(x - (fRect.fLeft + fRadii[kUpperLeft_Corner].fX), + y - (fRect.fTop + fRadii[kUpperLeft_Corner].fY)); + SkASSERT(canonicalPt.fX < 0 && canonicalPt.fY < 0); + } else if (x < fRect.fLeft + fRadii[kLowerLeft_Corner].fX && + y > fRect.fBottom - fRadii[kLowerLeft_Corner].fY) { + // LL corner + index = kLowerLeft_Corner; + canonicalPt.set(x - (fRect.fLeft + fRadii[kLowerLeft_Corner].fX), + y - (fRect.fBottom - fRadii[kLowerLeft_Corner].fY)); + SkASSERT(canonicalPt.fX < 0 && canonicalPt.fY > 0); + } else if (x > fRect.fRight - fRadii[kUpperRight_Corner].fX && + y < fRect.fTop + fRadii[kUpperRight_Corner].fY) { + // UR corner + index = kUpperRight_Corner; + canonicalPt.set(x - (fRect.fRight - fRadii[kUpperRight_Corner].fX), + y - (fRect.fTop + fRadii[kUpperRight_Corner].fY)); + SkASSERT(canonicalPt.fX > 0 && canonicalPt.fY < 0); + } else if (x > fRect.fRight - fRadii[kLowerRight_Corner].fX && + y > fRect.fBottom - fRadii[kLowerRight_Corner].fY) { + // LR corner + index = kLowerRight_Corner; + canonicalPt.set(x - (fRect.fRight - fRadii[kLowerRight_Corner].fX), + y - (fRect.fBottom - fRadii[kLowerRight_Corner].fY)); + SkASSERT(canonicalPt.fX > 0 && canonicalPt.fY > 0); + } else { + // not in any of the corners + return true; + } + } + + // A point is in an ellipse (in standard position) if: + // x^2 y^2 + // ----- + ----- <= 1 + // a^2 b^2 + // or : + // b^2*x^2 + a^2*y^2 <= (ab)^2 + SkScalar dist = SkScalarSquare(canonicalPt.fX) * SkScalarSquare(fRadii[index].fY) + + SkScalarSquare(canonicalPt.fY) * SkScalarSquare(fRadii[index].fX); + return dist <= SkScalarSquare(fRadii[index].fX * fRadii[index].fY); +} + +bool SkRRectPriv::IsNearlySimpleCircular(const SkRRect& rr, SkScalar tolerance) { + SkScalar simpleRadius = rr.fRadii[0].fX; + return SkScalarNearlyEqual(simpleRadius, rr.fRadii[0].fY, tolerance) && + SkScalarNearlyEqual(simpleRadius, rr.fRadii[1].fX, tolerance) && + SkScalarNearlyEqual(simpleRadius, rr.fRadii[1].fY, tolerance) && + SkScalarNearlyEqual(simpleRadius, rr.fRadii[2].fX, tolerance) && + SkScalarNearlyEqual(simpleRadius, rr.fRadii[2].fY, tolerance) && + SkScalarNearlyEqual(simpleRadius, rr.fRadii[3].fX, tolerance) && + SkScalarNearlyEqual(simpleRadius, rr.fRadii[3].fY, tolerance); +} + +bool SkRRectPriv::AllCornersCircular(const SkRRect& rr, SkScalar tolerance) { + return SkScalarNearlyEqual(rr.fRadii[0].fX, rr.fRadii[0].fY, tolerance) && + SkScalarNearlyEqual(rr.fRadii[1].fX, rr.fRadii[1].fY, tolerance) && + SkScalarNearlyEqual(rr.fRadii[2].fX, rr.fRadii[2].fY, tolerance) && + SkScalarNearlyEqual(rr.fRadii[3].fX, rr.fRadii[3].fY, tolerance); +} + +bool SkRRect::contains(const SkRect& rect) const { + if (!this->getBounds().contains(rect)) { + // If 'rect' isn't contained by the RR's bounds then the + // RR definitely doesn't contain it + return false; + } + + if (this->isRect()) { + // the prior test was sufficient + return true; + } + + // At this point we know all four corners of 'rect' are inside the + // bounds of of this RR. Check to make sure all the corners are inside + // all the curves + return this->checkCornerContainment(rect.fLeft, rect.fTop) && + this->checkCornerContainment(rect.fRight, rect.fTop) && + this->checkCornerContainment(rect.fRight, rect.fBottom) && + this->checkCornerContainment(rect.fLeft, rect.fBottom); +} + +static bool radii_are_nine_patch(const SkVector radii[4]) { + return radii[SkRRect::kUpperLeft_Corner].fX == radii[SkRRect::kLowerLeft_Corner].fX && + radii[SkRRect::kUpperLeft_Corner].fY == radii[SkRRect::kUpperRight_Corner].fY && + radii[SkRRect::kUpperRight_Corner].fX == radii[SkRRect::kLowerRight_Corner].fX && + radii[SkRRect::kLowerLeft_Corner].fY == radii[SkRRect::kLowerRight_Corner].fY; +} + +// There is a simplified version of this method in setRectXY +void SkRRect::computeType() { + if (fRect.isEmpty()) { + SkASSERT(fRect.isSorted()); + for (size_t i = 0; i < std::size(fRadii); ++i) { + SkASSERT((fRadii[i] == SkVector{0, 0})); + } + fType = kEmpty_Type; + SkASSERT(this->isValid()); + return; + } + + bool allRadiiEqual = true; // are all x radii equal and all y radii? + bool allCornersSquare = 0 == fRadii[0].fX || 0 == fRadii[0].fY; + + for (int i = 1; i < 4; ++i) { + if (0 != fRadii[i].fX && 0 != fRadii[i].fY) { + // if either radius is zero the corner is square so both have to + // be non-zero to have a rounded corner + allCornersSquare = false; + } + if (fRadii[i].fX != fRadii[i-1].fX || fRadii[i].fY != fRadii[i-1].fY) { + allRadiiEqual = false; + } + } + + if (allCornersSquare) { + fType = kRect_Type; + SkASSERT(this->isValid()); + return; + } + + if (allRadiiEqual) { + if (fRadii[0].fX >= SkScalarHalf(fRect.width()) && + fRadii[0].fY >= SkScalarHalf(fRect.height())) { + fType = kOval_Type; + } else { + fType = kSimple_Type; + } + SkASSERT(this->isValid()); + return; + } + + if (radii_are_nine_patch(fRadii)) { + fType = kNinePatch_Type; + } else { + fType = kComplex_Type; + } + + if (!this->isValid()) { + this->setRect(this->rect()); + SkASSERT(this->isValid()); + } +} + +bool SkRRect::transform(const SkMatrix& matrix, SkRRect* dst) const { + if (nullptr == dst) { + return false; + } + + // Assert that the caller is not trying to do this in place, which + // would violate const-ness. Do not return false though, so that + // if they know what they're doing and want to violate it they can. + SkASSERT(dst != this); + + if (matrix.isIdentity()) { + *dst = *this; + return true; + } + + if (!matrix.preservesAxisAlignment()) { + return false; + } + + SkRect newRect; + if (!matrix.mapRect(&newRect, fRect)) { + return false; + } + + // The matrix may have scaled us to zero (or due to float madness, we now have collapsed + // some dimension of the rect, so we need to check for that. Note that matrix must be + // scale and translate and mapRect() produces a sorted rect. So an empty rect indicates + // loss of precision. + if (!newRect.isFinite() || newRect.isEmpty()) { + return false; + } + + // At this point, this is guaranteed to succeed, so we can modify dst. + dst->fRect = newRect; + + // Since the only transforms that were allowed are axis aligned, the type + // remains unchanged. + dst->fType = fType; + + if (kRect_Type == fType) { + SkASSERT(dst->isValid()); + return true; + } + if (kOval_Type == fType) { + for (int i = 0; i < 4; ++i) { + dst->fRadii[i].fX = SkScalarHalf(newRect.width()); + dst->fRadii[i].fY = SkScalarHalf(newRect.height()); + } + SkASSERT(dst->isValid()); + return true; + } + + // Now scale each corner + SkScalar xScale = matrix.getScaleX(); + SkScalar yScale = matrix.getScaleY(); + + // There is a rotation of 90 (Clockwise 90) or 270 (Counter clockwise 90). + // 180 degrees rotations are simply flipX with a flipY and would come under + // a scale transform. + if (!matrix.isScaleTranslate()) { + const bool isClockwise = matrix.getSkewX() < 0; + + // The matrix location for scale changes if there is a rotation. + xScale = matrix.getSkewY() * (isClockwise ? 1 : -1); + yScale = matrix.getSkewX() * (isClockwise ? -1 : 1); + + const int dir = isClockwise ? 3 : 1; + for (int i = 0; i < 4; ++i) { + const int src = (i + dir) >= 4 ? (i + dir) % 4 : (i + dir); + // Swap X and Y axis for the radii. + dst->fRadii[i].fX = fRadii[src].fY; + dst->fRadii[i].fY = fRadii[src].fX; + } + } else { + for (int i = 0; i < 4; ++i) { + dst->fRadii[i].fX = fRadii[i].fX; + dst->fRadii[i].fY = fRadii[i].fY; + } + } + + const bool flipX = xScale < 0; + if (flipX) { + xScale = -xScale; + } + + const bool flipY = yScale < 0; + if (flipY) { + yScale = -yScale; + } + + // Scale the radii without respecting the flip. + for (int i = 0; i < 4; ++i) { + dst->fRadii[i].fX *= xScale; + dst->fRadii[i].fY *= yScale; + } + + // Now swap as necessary. + using std::swap; + if (flipX) { + if (flipY) { + // Swap with opposite corners + swap(dst->fRadii[kUpperLeft_Corner], dst->fRadii[kLowerRight_Corner]); + swap(dst->fRadii[kUpperRight_Corner], dst->fRadii[kLowerLeft_Corner]); + } else { + // Only swap in x + swap(dst->fRadii[kUpperRight_Corner], dst->fRadii[kUpperLeft_Corner]); + swap(dst->fRadii[kLowerRight_Corner], dst->fRadii[kLowerLeft_Corner]); + } + } else if (flipY) { + // Only swap in y + swap(dst->fRadii[kUpperLeft_Corner], dst->fRadii[kLowerLeft_Corner]); + swap(dst->fRadii[kUpperRight_Corner], dst->fRadii[kLowerRight_Corner]); + } + + if (!AreRectAndRadiiValid(dst->fRect, dst->fRadii)) { + return false; + } + + dst->scaleRadii(); + dst->isValid(); // TODO: is this meant to be SkASSERT(dst->isValid())? + + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkRRect::inset(SkScalar dx, SkScalar dy, SkRRect* dst) const { + SkRect r = fRect.makeInset(dx, dy); + bool degenerate = false; + if (r.fRight <= r.fLeft) { + degenerate = true; + r.fLeft = r.fRight = SkScalarAve(r.fLeft, r.fRight); + } + if (r.fBottom <= r.fTop) { + degenerate = true; + r.fTop = r.fBottom = SkScalarAve(r.fTop, r.fBottom); + } + if (degenerate) { + dst->fRect = r; + memset(dst->fRadii, 0, sizeof(dst->fRadii)); + dst->fType = kEmpty_Type; + return; + } + if (!r.isFinite()) { + *dst = SkRRect(); + return; + } + + SkVector radii[4]; + memcpy(radii, fRadii, sizeof(radii)); + for (int i = 0; i < 4; ++i) { + if (radii[i].fX) { + radii[i].fX -= dx; + } + if (radii[i].fY) { + radii[i].fY -= dy; + } + } + dst->setRectRadii(r, radii); +} + +/////////////////////////////////////////////////////////////////////////////// + +size_t SkRRect::writeToMemory(void* buffer) const { + // Serialize only the rect and corners, but not the derived type tag. + memcpy(buffer, this, kSizeInMemory); + return kSizeInMemory; +} + +void SkRRectPriv::WriteToBuffer(const SkRRect& rr, SkWBuffer* buffer) { + // Serialize only the rect and corners, but not the derived type tag. + buffer->write(&rr, SkRRect::kSizeInMemory); +} + +size_t SkRRect::readFromMemory(const void* buffer, size_t length) { + if (length < kSizeInMemory) { + return 0; + } + + // The extra (void*) tells GCC not to worry that kSizeInMemory < sizeof(SkRRect). + + SkRRect raw; + memcpy((void*)&raw, buffer, kSizeInMemory); + this->setRectRadii(raw.fRect, raw.fRadii); + return kSizeInMemory; +} + +bool SkRRectPriv::ReadFromBuffer(SkRBuffer* buffer, SkRRect* rr) { + if (buffer->available() < SkRRect::kSizeInMemory) { + return false; + } + SkRRect storage; + return buffer->read(&storage, SkRRect::kSizeInMemory) && + (rr->readFromMemory(&storage, SkRRect::kSizeInMemory) == SkRRect::kSizeInMemory); +} + +SkString SkRRect::dumpToString(bool asHex) const { + SkScalarAsStringType asType = asHex ? kHex_SkScalarAsStringType : kDec_SkScalarAsStringType; + + fRect.dump(asHex); + SkString line("const SkPoint corners[] = {\n"); + for (int i = 0; i < 4; ++i) { + SkString strX, strY; + SkAppendScalar(&strX, fRadii[i].x(), asType); + SkAppendScalar(&strY, fRadii[i].y(), asType); + line.appendf(" { %s, %s },", strX.c_str(), strY.c_str()); + if (asHex) { + line.appendf(" /* %f %f */", fRadii[i].x(), fRadii[i].y()); + } + line.append("\n"); + } + line.append("};"); + return line; +} + +void SkRRect::dump(bool asHex) const { SkDebugf("%s\n", this->dumpToString(asHex).c_str()); } + +/////////////////////////////////////////////////////////////////////////////// + +/** + * We need all combinations of predicates to be true to have a "safe" radius value. + */ +static bool are_radius_check_predicates_valid(SkScalar rad, SkScalar min, SkScalar max) { + return (min <= max) && (rad <= max - min) && (min + rad <= max) && (max - rad >= min) && + rad >= 0; +} + +bool SkRRect::isValid() const { + if (!AreRectAndRadiiValid(fRect, fRadii)) { + return false; + } + + bool allRadiiZero = (0 == fRadii[0].fX && 0 == fRadii[0].fY); + bool allCornersSquare = (0 == fRadii[0].fX || 0 == fRadii[0].fY); + bool allRadiiSame = true; + + for (int i = 1; i < 4; ++i) { + if (0 != fRadii[i].fX || 0 != fRadii[i].fY) { + allRadiiZero = false; + } + + if (fRadii[i].fX != fRadii[i-1].fX || fRadii[i].fY != fRadii[i-1].fY) { + allRadiiSame = false; + } + + if (0 != fRadii[i].fX && 0 != fRadii[i].fY) { + allCornersSquare = false; + } + } + bool patchesOfNine = radii_are_nine_patch(fRadii); + + if (fType < 0 || fType > kLastType) { + return false; + } + + switch (fType) { + case kEmpty_Type: + if (!fRect.isEmpty() || !allRadiiZero || !allRadiiSame || !allCornersSquare) { + return false; + } + break; + case kRect_Type: + if (fRect.isEmpty() || !allRadiiZero || !allRadiiSame || !allCornersSquare) { + return false; + } + break; + case kOval_Type: + if (fRect.isEmpty() || allRadiiZero || !allRadiiSame || allCornersSquare) { + return false; + } + + for (int i = 0; i < 4; ++i) { + if (!SkScalarNearlyEqual(fRadii[i].fX, SkRectPriv::HalfWidth(fRect)) || + !SkScalarNearlyEqual(fRadii[i].fY, SkRectPriv::HalfHeight(fRect))) { + return false; + } + } + break; + case kSimple_Type: + if (fRect.isEmpty() || allRadiiZero || !allRadiiSame || allCornersSquare) { + return false; + } + break; + case kNinePatch_Type: + if (fRect.isEmpty() || allRadiiZero || allRadiiSame || allCornersSquare || + !patchesOfNine) { + return false; + } + break; + case kComplex_Type: + if (fRect.isEmpty() || allRadiiZero || allRadiiSame || allCornersSquare || + patchesOfNine) { + return false; + } + break; + } + + return true; +} + +bool SkRRect::AreRectAndRadiiValid(const SkRect& rect, const SkVector radii[4]) { + if (!rect.isFinite() || !rect.isSorted()) { + return false; + } + for (int i = 0; i < 4; ++i) { + if (!are_radius_check_predicates_valid(radii[i].fX, rect.fLeft, rect.fRight) || + !are_radius_check_predicates_valid(radii[i].fY, rect.fTop, rect.fBottom)) { + return false; + } + } + return true; +} +/////////////////////////////////////////////////////////////////////////////// + +SkRect SkRRectPriv::InnerBounds(const SkRRect& rr) { + if (rr.isEmpty() || rr.isRect()) { + return rr.rect(); + } + + // We start with the outer bounds of the round rect and consider three subsets and take the + // one with maximum area. The first two are the horizontal and vertical rects inset from the + // corners, the third is the rect inscribed at the corner curves' maximal point. This forms + // the exact solution when all corners have the same radii (the radii do not have to be + // circular). + SkRect innerBounds = rr.getBounds(); + SkVector tl = rr.radii(SkRRect::kUpperLeft_Corner); + SkVector tr = rr.radii(SkRRect::kUpperRight_Corner); + SkVector bl = rr.radii(SkRRect::kLowerLeft_Corner); + SkVector br = rr.radii(SkRRect::kLowerRight_Corner); + + // Select maximum inset per edge, which may move an adjacent corner of the inscribed + // rectangle off of the rounded-rect path, but that is acceptable given that the general + // equation for inscribed area is non-trivial to evaluate. + SkScalar leftShift = std::max(tl.fX, bl.fX); + SkScalar topShift = std::max(tl.fY, tr.fY); + SkScalar rightShift = std::max(tr.fX, br.fX); + SkScalar bottomShift = std::max(bl.fY, br.fY); + + SkScalar dw = leftShift + rightShift; + SkScalar dh = topShift + bottomShift; + + // Area removed by shifting left/right + SkScalar horizArea = (innerBounds.width() - dw) * innerBounds.height(); + // And by shifting top/bottom + SkScalar vertArea = (innerBounds.height() - dh) * innerBounds.width(); + // And by shifting all edges: just considering a corner ellipse, the maximum inscribed rect has + // a corner at sqrt(2)/2 * (rX, rY), so scale all corner shifts by (1 - sqrt(2)/2) to get the + // safe shift per edge (since the shifts already are the max radius for that edge). + // - We actually scale by a value slightly increased to make it so that the shifted corners are + // safely inside the curves, otherwise numerical stability can cause it to fail contains(). + static constexpr SkScalar kScale = (1.f - SK_ScalarRoot2Over2) + 1e-5f; + SkScalar innerArea = (innerBounds.width() - kScale * dw) * (innerBounds.height() - kScale * dh); + + if (horizArea > vertArea && horizArea > innerArea) { + // Cut off corners by insetting left and right + innerBounds.fLeft += leftShift; + innerBounds.fRight -= rightShift; + } else if (vertArea > innerArea) { + // Cut off corners by insetting top and bottom + innerBounds.fTop += topShift; + innerBounds.fBottom -= bottomShift; + } else if (innerArea > 0.f) { + // Inset on all sides, scaled to touch + innerBounds.fLeft += kScale * leftShift; + innerBounds.fRight -= kScale * rightShift; + innerBounds.fTop += kScale * topShift; + innerBounds.fBottom -= kScale * bottomShift; + } else { + // Inner region would collapse to empty + return SkRect::MakeEmpty(); + } + + SkASSERT(innerBounds.isSorted() && !innerBounds.isEmpty()); + return innerBounds; +} + +SkRRect SkRRectPriv::ConservativeIntersect(const SkRRect& a, const SkRRect& b) { + // Returns the coordinate of the rect matching the corner enum. + auto getCorner = [](const SkRect& r, SkRRect::Corner corner) -> SkPoint { + switch(corner) { + case SkRRect::kUpperLeft_Corner: return {r.fLeft, r.fTop}; + case SkRRect::kUpperRight_Corner: return {r.fRight, r.fTop}; + case SkRRect::kLowerLeft_Corner: return {r.fLeft, r.fBottom}; + case SkRRect::kLowerRight_Corner: return {r.fRight, r.fBottom}; + default: SkUNREACHABLE; + } + }; + // Returns true if shape A's extreme point is contained within shape B's extreme point, relative + // to the 'corner' location. If the two shapes' corners have the same ellipse radii, this + // is sufficient for A's ellipse arc to be contained by B's ellipse arc. + auto insideCorner = [](SkRRect::Corner corner, const SkPoint& a, const SkPoint& b) { + switch(corner) { + case SkRRect::kUpperLeft_Corner: return a.fX >= b.fX && a.fY >= b.fY; + case SkRRect::kUpperRight_Corner: return a.fX <= b.fX && a.fY >= b.fY; + case SkRRect::kLowerRight_Corner: return a.fX <= b.fX && a.fY <= b.fY; + case SkRRect::kLowerLeft_Corner: return a.fX >= b.fX && a.fY <= b.fY; + default: SkUNREACHABLE; + } + }; + + auto getIntersectionRadii = [&](const SkRect& r, SkRRect::Corner corner, SkVector* radii) { + SkPoint test = getCorner(r, corner); + SkPoint aCorner = getCorner(a.rect(), corner); + SkPoint bCorner = getCorner(b.rect(), corner); + + if (test == aCorner && test == bCorner) { + // The round rects share a corner anchor, so pick A or B such that its X and Y radii + // are both larger than the other rrect's, or return false if neither A or B has the max + // corner radii (this is more permissive than the single corner tests below). + SkVector aRadii = a.radii(corner); + SkVector bRadii = b.radii(corner); + if (aRadii.fX >= bRadii.fX && aRadii.fY >= bRadii.fY) { + *radii = aRadii; + return true; + } else if (bRadii.fX >= aRadii.fX && bRadii.fY >= aRadii.fY) { + *radii = bRadii; + return true; + } else { + return false; + } + } else if (test == aCorner) { + // Test that A's ellipse is contained by B. This is a non-trivial function to evaluate + // so we resrict it to when the corners have the same radii. If not, we use the more + // conservative test that the extreme point of A's bounding box is contained in B. + *radii = a.radii(corner); + if (*radii == b.radii(corner)) { + return insideCorner(corner, aCorner, bCorner); // A inside B + } else { + return b.checkCornerContainment(aCorner.fX, aCorner.fY); + } + } else if (test == bCorner) { + // Mirror of the above + *radii = b.radii(corner); + if (*radii == a.radii(corner)) { + return insideCorner(corner, bCorner, aCorner); // B inside A + } else { + return a.checkCornerContainment(bCorner.fX, bCorner.fY); + } + } else { + // This is a corner formed by two straight edges of A and B, so confirm that it is + // contained in both (if not, then the intersection can't be a round rect). + *radii = {0.f, 0.f}; + return a.checkCornerContainment(test.fX, test.fY) && + b.checkCornerContainment(test.fX, test.fY); + } + }; + + // We fill in the SkRRect directly. Since the rect and radii are either 0s or determined by + // valid existing SkRRects, we know we are finite. + SkRRect intersection; + if (!intersection.fRect.intersect(a.rect(), b.rect())) { + // Definitely no intersection + return SkRRect::MakeEmpty(); + } + + const SkRRect::Corner corners[] = { + SkRRect::kUpperLeft_Corner, + SkRRect::kUpperRight_Corner, + SkRRect::kLowerRight_Corner, + SkRRect::kLowerLeft_Corner + }; + // By definition, edges is contained in the bounds of 'a' and 'b', but now we need to consider + // the corners. If the bound's corner point is in both rrects, the corner radii will be 0s. + // If the bound's corner point matches a's edges and is inside 'b', we use a's radii. + // Same for b's radii. If any corner fails these conditions, we reject the intersection as an + // rrect. If after determining radii for all 4 corners, they would overlap, we also reject the + // intersection shape. + for (auto c : corners) { + if (!getIntersectionRadii(intersection.fRect, c, &intersection.fRadii[c])) { + return SkRRect::MakeEmpty(); // Resulting intersection is not a rrect + } + } + + // Check for radius overlap along the four edges, since the earlier evaluation was only a + // one-sided corner check. If they aren't valid, a corner's radii doesn't fit within the rect. + // If the radii are scaled, the combination of radii from two adjacent corners doesn't fit. + // Normally for a regularly constructed SkRRect, we want this scaling, but in this case it means + // the intersection shape is definitively not a round rect. + if (!SkRRect::AreRectAndRadiiValid(intersection.fRect, intersection.fRadii) || + intersection.scaleRadii()) { + return SkRRect::MakeEmpty(); + } + + // The intersection is an rrect of the given radii. Potentially all 4 corners could have + // been simplified to (0,0) radii, making the intersection a rectangle. + intersection.computeType(); + return intersection; +} diff --git a/gfx/skia/skia/src/core/SkRRectPriv.h b/gfx/skia/skia/src/core/SkRRectPriv.h new file mode 100644 index 0000000000..cea579c901 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRRectPriv.h @@ -0,0 +1,67 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRRectPriv_DEFINED +#define SkRRectPriv_DEFINED + +#include "include/core/SkRRect.h" + +class SkRBuffer; +class SkWBuffer; + +class SkRRectPriv { +public: + static bool IsCircle(const SkRRect& rr) { + return rr.isOval() && SkScalarNearlyEqual(rr.fRadii[0].fX, rr.fRadii[0].fY); + } + + static SkVector GetSimpleRadii(const SkRRect& rr) { + SkASSERT(!rr.isComplex()); + return rr.fRadii[0]; + } + + static bool IsSimpleCircular(const SkRRect& rr) { + return rr.isSimple() && SkScalarNearlyEqual(rr.fRadii[0].fX, rr.fRadii[0].fY); + } + + // Looser version of IsSimpleCircular, where the x & y values of the radii + // only have to be nearly equal instead of strictly equal. + static bool IsNearlySimpleCircular(const SkRRect& rr, SkScalar tolerance = SK_ScalarNearlyZero); + + static bool EqualRadii(const SkRRect& rr) { + return rr.isRect() || SkRRectPriv::IsCircle(rr) || SkRRectPriv::IsSimpleCircular(rr); + } + + static const SkVector* GetRadiiArray(const SkRRect& rr) { return rr.fRadii; } + + static bool AllCornersCircular(const SkRRect& rr, SkScalar tolerance = SK_ScalarNearlyZero); + + static bool ReadFromBuffer(SkRBuffer* buffer, SkRRect* rr); + + static void WriteToBuffer(const SkRRect& rr, SkWBuffer* buffer); + + // Test if a point is in the rrect, if it were a closed set. + static bool ContainsPoint(const SkRRect& rr, const SkPoint& p) { + return rr.getBounds().contains(p.fX, p.fY) && rr.checkCornerContainment(p.fX, p.fY); + } + + // Compute an approximate largest inscribed bounding box of the rounded rect. For empty, + // rect, oval, and simple types this will be the largest inscribed rectangle. Otherwise it may + // not be the global maximum, but will be non-empty, touch at least one edge and be contained + // in the round rect. + static SkRect InnerBounds(const SkRRect& rr); + + // Attempt to compute the intersection of two round rects. The intersection is not necessarily + // a round rect. This returns intersections only when the shape is representable as a new + // round rect (or rect). Empty is returned if 'a' and 'b' do not intersect or if the + // intersection is too complicated. This is conservative, it may not always detect that an + // intersection could be represented as a round rect. However, when it does return a round rect + // that intersection will be exact (i.e. it is NOT just a subset of the actual intersection). + static SkRRect ConservativeIntersect(const SkRRect& a, const SkRRect& b); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkRSXform.cpp b/gfx/skia/skia/src/core/SkRSXform.cpp new file mode 100644 index 0000000000..67f18345c6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRSXform.cpp @@ -0,0 +1,45 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkRSXform.h" + +void SkRSXform::toQuad(SkScalar width, SkScalar height, SkPoint quad[4]) const { +#if 0 + // This is the slow way, but it documents what we're doing + quad[0].set(0, 0); + quad[1].set(width, 0); + quad[2].set(width, height); + quad[3].set(0, height); + SkMatrix m; + m.setRSXform(*this).mapPoints(quad, quad, 4); +#else + const SkScalar m00 = fSCos; + const SkScalar m01 = -fSSin; + const SkScalar m02 = fTx; + const SkScalar m10 = -m01; + const SkScalar m11 = m00; + const SkScalar m12 = fTy; + + quad[0].set(m02, m12); + quad[1].set(m00 * width + m02, m10 * width + m12); + quad[2].set(m00 * width + m01 * height + m02, m10 * width + m11 * height + m12); + quad[3].set(m01 * height + m02, m11 * height + m12); +#endif +} + +void SkRSXform::toTriStrip(SkScalar width, SkScalar height, SkPoint strip[4]) const { + const SkScalar m00 = fSCos; + const SkScalar m01 = -fSSin; + const SkScalar m02 = fTx; + const SkScalar m10 = -m01; + const SkScalar m11 = m00; + const SkScalar m12 = fTy; + + strip[0].set(m02, m12); + strip[1].set(m01 * height + m02, m11 * height + m12); + strip[2].set(m00 * width + m02, m10 * width + m12); + strip[3].set(m00 * width + m01 * height + m02, m10 * width + m11 * height + m12); +} diff --git a/gfx/skia/skia/src/core/SkRTree.cpp b/gfx/skia/skia/src/core/SkRTree.cpp new file mode 100644 index 0000000000..eb996205a4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRTree.cpp @@ -0,0 +1,168 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkRTree.h" + +SkRTree::SkRTree() : fCount(0) {} + +void SkRTree::insert(const SkRect boundsArray[], int N) { + SkASSERT(0 == fCount); + + std::vector branches; + branches.reserve(N); + + for (int i = 0; i < N; i++) { + const SkRect& bounds = boundsArray[i]; + if (bounds.isEmpty()) { + continue; + } + + Branch b; + b.fBounds = bounds; + b.fOpIndex = i; + branches.push_back(b); + } + + fCount = (int)branches.size(); + if (fCount) { + if (1 == fCount) { + fNodes.reserve(1); + Node* n = this->allocateNodeAtLevel(0); + n->fNumChildren = 1; + n->fChildren[0] = branches[0]; + fRoot.fSubtree = n; + fRoot.fBounds = branches[0].fBounds; + } else { + fNodes.reserve(CountNodes(fCount)); + fRoot = this->bulkLoad(&branches); + } + } +} + +SkRTree::Node* SkRTree::allocateNodeAtLevel(uint16_t level) { + SkDEBUGCODE(Node* p = fNodes.data()); + fNodes.push_back(Node{}); + Node& out = fNodes.back(); + SkASSERT(fNodes.data() == p); // If this fails, we didn't reserve() enough. + out.fNumChildren = 0; + out.fLevel = level; + return &out; +} + +// This function parallels bulkLoad, but just counts how many nodes bulkLoad would allocate. +int SkRTree::CountNodes(int branches) { + if (branches == 1) { + return 1; + } + int remainder = branches % kMaxChildren; + if (remainder > 0) { + if (remainder >= kMinChildren) { + remainder = 0; + } else { + remainder = kMinChildren - remainder; + } + } + int currentBranch = 0; + int nodes = 0; + while (currentBranch < branches) { + int incrementBy = kMaxChildren; + if (remainder != 0) { + if (remainder <= kMaxChildren - kMinChildren) { + incrementBy -= remainder; + remainder = 0; + } else { + incrementBy = kMinChildren; + remainder -= kMaxChildren - kMinChildren; + } + } + nodes++; + currentBranch++; + for (int k = 1; k < incrementBy && currentBranch < branches; ++k) { + currentBranch++; + } + } + return nodes + CountNodes(nodes); +} + +SkRTree::Branch SkRTree::bulkLoad(std::vector* branches, int level) { + if (branches->size() == 1) { // Only one branch. It will be the root. + return (*branches)[0]; + } + + // We might sort our branches here, but we expect Blink gives us a reasonable x,y order. + // Skipping a call to sort (in Y) here resulted in a 17% win for recording with negligible + // difference in playback speed. + int remainder = (int)branches->size() % kMaxChildren; + int newBranches = 0; + + if (remainder > 0) { + // If the remainder isn't enough to fill a node, we'll add fewer nodes to other branches. + if (remainder >= kMinChildren) { + remainder = 0; + } else { + remainder = kMinChildren - remainder; + } + } + + int currentBranch = 0; + while (currentBranch < (int)branches->size()) { + int incrementBy = kMaxChildren; + if (remainder != 0) { + // if need be, omit some nodes to make up for remainder + if (remainder <= kMaxChildren - kMinChildren) { + incrementBy -= remainder; + remainder = 0; + } else { + incrementBy = kMinChildren; + remainder -= kMaxChildren - kMinChildren; + } + } + Node* n = allocateNodeAtLevel(level); + n->fNumChildren = 1; + n->fChildren[0] = (*branches)[currentBranch]; + Branch b; + b.fBounds = (*branches)[currentBranch].fBounds; + b.fSubtree = n; + ++currentBranch; + for (int k = 1; k < incrementBy && currentBranch < (int)branches->size(); ++k) { + b.fBounds.join((*branches)[currentBranch].fBounds); + n->fChildren[k] = (*branches)[currentBranch]; + ++n->fNumChildren; + ++currentBranch; + } + (*branches)[newBranches] = b; + ++newBranches; + } + branches->resize(newBranches); + return this->bulkLoad(branches, level + 1); +} + +void SkRTree::search(const SkRect& query, std::vector* results) const { + if (fCount > 0 && SkRect::Intersects(fRoot.fBounds, query)) { + this->search(fRoot.fSubtree, query, results); + } +} + +void SkRTree::search(Node* node, const SkRect& query, std::vector* results) const { + for (int i = 0; i < node->fNumChildren; ++i) { + if (SkRect::Intersects(node->fChildren[i].fBounds, query)) { + if (0 == node->fLevel) { + results->push_back(node->fChildren[i].fOpIndex); + } else { + this->search(node->fChildren[i].fSubtree, query, results); + } + } + } +} + +size_t SkRTree::bytesUsed() const { + size_t byteCount = sizeof(SkRTree); + + byteCount += fNodes.capacity() * sizeof(Node); + + return byteCount; +} diff --git a/gfx/skia/skia/src/core/SkRTree.h b/gfx/skia/skia/src/core/SkRTree.h new file mode 100644 index 0000000000..03d55ebcd0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRTree.h @@ -0,0 +1,82 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRTree_DEFINED +#define SkRTree_DEFINED + +#include "include/core/SkBBHFactory.h" +#include "include/core/SkRect.h" + +/** + * An R-Tree implementation. In short, it is a balanced n-ary tree containing a hierarchy of + * bounding rectangles. + * + * It only supports bulk-loading, i.e. creation from a batch of bounding rectangles. + * This performs a bottom-up bulk load using the STR (sort-tile-recursive) algorithm. + * + * TODO: Experiment with other bulk-load algorithms (in particular the Hilbert pack variant, + * which groups rects by position on the Hilbert curve, is probably worth a look). There also + * exist top-down bulk load variants (VAMSplit, TopDownGreedy, etc). + * + * For more details see: + * + * Beckmann, N.; Kriegel, H. P.; Schneider, R.; Seeger, B. (1990). "The R*-tree: + * an efficient and robust access method for points and rectangles" + */ +class SkRTree : public SkBBoxHierarchy { +public: + SkRTree(); + + void insert(const SkRect[], int N) override; + void search(const SkRect& query, std::vector* results) const override; + size_t bytesUsed() const override; + + // Methods and constants below here are only public for tests. + + // Return the depth of the tree structure. + int getDepth() const { return fCount ? fRoot.fSubtree->fLevel + 1 : 0; } + // Insertion count (not overall node count, which may be greater). + int getCount() const { return fCount; } + + // These values were empirically determined to produce reasonable performance in most cases. + static const int kMinChildren = 6, + kMaxChildren = 11; + +private: + struct Node; + + struct Branch { + union { + Node* fSubtree; + int fOpIndex; + }; + SkRect fBounds; + }; + + struct Node { + uint16_t fNumChildren; + uint16_t fLevel; + Branch fChildren[kMaxChildren]; + }; + + void search(Node* root, const SkRect& query, std::vector* results) const; + + // Consumes the input array. + Branch bulkLoad(std::vector* branches, int level = 0); + + // How many times will bulkLoad() call allocateNodeAtLevel()? + static int CountNodes(int branches); + + Node* allocateNodeAtLevel(uint16_t level); + + // This is the count of data elements (rather than total nodes in the tree) + int fCount; + Branch fRoot; + std::vector fNodes; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkRasterClip.cpp b/gfx/skia/skia/src/core/SkRasterClip.cpp new file mode 100644 index 0000000000..524a47fdc8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterClip.cpp @@ -0,0 +1,328 @@ +/* + * Copyright 2010 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRegionPriv.h" + +SkRasterClip::SkRasterClip(const SkRasterClip& that) + : fIsBW(that.fIsBW) + , fIsEmpty(that.fIsEmpty) + , fIsRect(that.fIsRect) + , fShader(that.fShader) +{ + AUTO_RASTERCLIP_VALIDATE(that); + + if (fIsBW) { + fBW = that.fBW; + } else { + fAA = that.fAA; + } + + SkDEBUGCODE(this->validate();) +} + +SkRasterClip& SkRasterClip::operator=(const SkRasterClip& that) { + AUTO_RASTERCLIP_VALIDATE(that); + + fIsBW = that.fIsBW; + if (fIsBW) { + fBW = that.fBW; + } else { + fAA = that.fAA; + } + + fIsEmpty = that.isEmpty(); + fIsRect = that.isRect(); + fShader = that.fShader; + SkDEBUGCODE(this->validate();) + return *this; +} + +SkRasterClip::SkRasterClip(const SkRegion& rgn) : fBW(rgn) { + fIsBW = true; + fIsEmpty = this->computeIsEmpty(); // bounds might be empty, so compute + fIsRect = !fIsEmpty; + SkDEBUGCODE(this->validate();) +} + +SkRasterClip::SkRasterClip(const SkIRect& bounds) : fBW(bounds) { + fIsBW = true; + fIsEmpty = this->computeIsEmpty(); // bounds might be empty, so compute + fIsRect = !fIsEmpty; + SkDEBUGCODE(this->validate();) +} + +SkRasterClip::SkRasterClip() { + fIsBW = true; + fIsEmpty = true; + fIsRect = false; + SkDEBUGCODE(this->validate();) +} + +SkRasterClip::SkRasterClip(const SkPath& path, const SkIRect& bounds, bool doAA) { + if (doAA) { + fIsBW = false; + fAA.setPath(path, bounds, true); + } else { + fIsBW = true; + fBW.setPath(path, SkRegion(bounds)); + } + fIsEmpty = this->computeIsEmpty(); // bounds might be empty, so compute + fIsRect = this->computeIsRect(); + SkDEBUGCODE(this->validate();) +} + +SkRasterClip::~SkRasterClip() { + SkDEBUGCODE(this->validate();) +} + +bool SkRasterClip::setEmpty() { + AUTO_RASTERCLIP_VALIDATE(*this); + + fIsBW = true; + fBW.setEmpty(); + fAA.setEmpty(); + fIsEmpty = true; + fIsRect = false; + return false; +} + +bool SkRasterClip::setRect(const SkIRect& rect) { + AUTO_RASTERCLIP_VALIDATE(*this); + + fIsBW = true; + fAA.setEmpty(); + fIsRect = fBW.setRect(rect); + fIsEmpty = !fIsRect; + return fIsRect; +} + +///////////////////////////////////////////////////////////////////////////////////// + +bool SkRasterClip::op(const SkIRect& rect, SkClipOp op) { + AUTO_RASTERCLIP_VALIDATE(*this); + + if (fIsBW) { + fBW.op(rect, (SkRegion::Op) op); + } else { + fAA.op(rect, op); + } + return this->updateCacheAndReturnNonEmpty(); +} + +bool SkRasterClip::op(const SkRegion& rgn, SkClipOp op) { + AUTO_RASTERCLIP_VALIDATE(*this); + + if (fIsBW) { + (void)fBW.op(rgn, (SkRegion::Op) op); + } else { + SkAAClip tmp; + tmp.setRegion(rgn); + (void)fAA.op(tmp, op); + } + return this->updateCacheAndReturnNonEmpty(); +} + +/** + * Our antialiasing currently has a granularity of 1/4 of a pixel along each + * axis. Thus we can treat an axis coordinate as an integer if it differs + * from its nearest int by < half of that value (1/8 in this case). + */ +static bool nearly_integral(SkScalar x) { + static const SkScalar domain = SK_Scalar1 / 4; + static const SkScalar halfDomain = domain / 2; + + x += halfDomain; + return x - SkScalarFloorToScalar(x) < domain; +} + +bool SkRasterClip::op(const SkRect& localRect, const SkMatrix& matrix, SkClipOp op, bool doAA) { + AUTO_RASTERCLIP_VALIDATE(*this); + + const bool isScaleTrans = matrix.isScaleTranslate(); + if (!isScaleTrans) { + return this->op(SkPath::Rect(localRect), matrix, op, doAA); + } + + SkRect devRect = matrix.mapRect(localRect); + if (fIsBW && doAA) { + // check that the rect really needs aa, or is it close enought to + // integer boundaries that we can just treat it as a BW rect? + if (nearly_integral(devRect.fLeft) && nearly_integral(devRect.fTop) && + nearly_integral(devRect.fRight) && nearly_integral(devRect.fBottom)) { + doAA = false; + } + } + + if (fIsBW && !doAA) { + (void)fBW.op(devRect.round(), (SkRegion::Op) op); + } else { + if (fIsBW) { + this->convertToAA(); + } + (void)fAA.op(devRect, op, doAA); + } + return this->updateCacheAndReturnNonEmpty(); +} + +bool SkRasterClip::op(const SkRRect& rrect, const SkMatrix& matrix, SkClipOp op, bool doAA) { + return this->op(SkPath::RRect(rrect), matrix, op, doAA); +} + +bool SkRasterClip::op(const SkPath& path, const SkMatrix& matrix, SkClipOp op, bool doAA) { + AUTO_RASTERCLIP_VALIDATE(*this); + + SkPath devPath; + path.transform(matrix, &devPath); + + // Since op is either intersect or difference, the clip is always shrinking; that means we can + // always use our current bounds as the limiting factor for region/aaclip operations. + if (this->isRect() && op == SkClipOp::kIntersect) { + // However, in the relatively common case of intersecting a new path with a rectangular + // clip, it's faster to convert the path into a region/aa-mask in place than evaluate the + // actual intersection. See skbug.com/12398 + if (doAA && fIsBW) { + this->convertToAA(); + } + if (fIsBW) { + fBW.setPath(devPath, SkRegion(this->getBounds())); + } else { + fAA.setPath(devPath, this->getBounds(), doAA); + } + return this->updateCacheAndReturnNonEmpty(); + } else { + return this->op(SkRasterClip(devPath, this->getBounds(), doAA), op); + } +} + +bool SkRasterClip::op(sk_sp sh) { + AUTO_RASTERCLIP_VALIDATE(*this); + + if (!fShader) { + fShader = sh; + } else { + fShader = SkShaders::Blend(SkBlendMode::kSrcIn, sh, fShader); + } + return !this->isEmpty(); +} + +bool SkRasterClip::op(const SkRasterClip& clip, SkClipOp op) { + AUTO_RASTERCLIP_VALIDATE(*this); + clip.validate(); + + if (this->isBW() && clip.isBW()) { + (void)fBW.op(clip.fBW, (SkRegion::Op) op); + } else { + SkAAClip tmp; + const SkAAClip* other; + + if (this->isBW()) { + this->convertToAA(); + } + if (clip.isBW()) { + tmp.setRegion(clip.bwRgn()); + other = &tmp; + } else { + other = &clip.aaRgn(); + } + (void)fAA.op(*other, op); + } + return this->updateCacheAndReturnNonEmpty(); +} + +void SkRasterClip::translate(int dx, int dy, SkRasterClip* dst) const { + if (nullptr == dst) { + return; + } + + AUTO_RASTERCLIP_VALIDATE(*this); + + if (this->isEmpty()) { + dst->setEmpty(); + return; + } + if (0 == (dx | dy)) { + *dst = *this; + return; + } + + dst->fIsBW = fIsBW; + if (fIsBW) { + fBW.translate(dx, dy, &dst->fBW); + dst->fAA.setEmpty(); + } else { + fAA.translate(dx, dy, &dst->fAA); + dst->fBW.setEmpty(); + } + dst->updateCacheAndReturnNonEmpty(); +} + +void SkRasterClip::convertToAA() { + AUTO_RASTERCLIP_VALIDATE(*this); + + SkASSERT(fIsBW); + fAA.setRegion(fBW); + fIsBW = false; + + // since we are being explicitly asked to convert-to-aa, we pass false so we don't "optimize" + // ourselves back to BW. + (void)this->updateCacheAndReturnNonEmpty(false); +} + +#ifdef SK_DEBUG +void SkRasterClip::validate() const { + // can't ever assert that fBW is empty, since we may have called forceGetBW + if (fIsBW) { + SkASSERT(fAA.isEmpty()); + } + + SkRegionPriv::Validate(fBW); + fAA.validate(); + + SkASSERT(this->computeIsEmpty() == fIsEmpty); + SkASSERT(this->computeIsRect() == fIsRect); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +SkAAClipBlitterWrapper::SkAAClipBlitterWrapper() { + SkDEBUGCODE(fClipRgn = nullptr;) + SkDEBUGCODE(fBlitter = nullptr;) +} + +SkAAClipBlitterWrapper::SkAAClipBlitterWrapper(const SkRasterClip& clip, + SkBlitter* blitter) { + this->init(clip, blitter); +} + +SkAAClipBlitterWrapper::SkAAClipBlitterWrapper(const SkAAClip* aaclip, + SkBlitter* blitter) { + SkASSERT(blitter); + SkASSERT(aaclip); + fBWRgn.setRect(aaclip->getBounds()); + fAABlitter.init(blitter, aaclip); + // now our return values + fClipRgn = &fBWRgn; + fBlitter = &fAABlitter; +} + +void SkAAClipBlitterWrapper::init(const SkRasterClip& clip, SkBlitter* blitter) { + SkASSERT(blitter); + if (clip.isBW()) { + fClipRgn = &clip.bwRgn(); + fBlitter = blitter; + } else { + const SkAAClip& aaclip = clip.aaRgn(); + fBWRgn.setRect(aaclip.getBounds()); + fAABlitter.init(blitter, &aaclip); + // now our return values + fClipRgn = &fBWRgn; + fBlitter = &fAABlitter; + } +} diff --git a/gfx/skia/skia/src/core/SkRasterClip.h b/gfx/skia/skia/src/core/SkRasterClip.h new file mode 100644 index 0000000000..b8362c38eb --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterClip.h @@ -0,0 +1,185 @@ +/* + * Copyright 2010 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRasterClip_DEFINED +#define SkRasterClip_DEFINED + +#include "include/core/SkClipOp.h" +#include "include/core/SkRegion.h" +#include "include/core/SkShader.h" +#include "include/private/base/SkMacros.h" +#include "src/core/SkAAClip.h" + +class SkRRect; + +/** + * Wraps a SkRegion and SkAAClip, so we have a single object that can represent either our + * BW or antialiased clips. + */ +class SkRasterClip { +public: + SkRasterClip(); + explicit SkRasterClip(const SkIRect&); + explicit SkRasterClip(const SkRegion&); + explicit SkRasterClip(const SkRasterClip&); + SkRasterClip(const SkPath& path, const SkIRect& bounds, bool doAA); + + ~SkRasterClip(); + + SkRasterClip& operator=(const SkRasterClip&); + + bool isBW() const { return fIsBW; } + bool isAA() const { return !fIsBW; } + const SkRegion& bwRgn() const { SkASSERT(fIsBW); return fBW; } + const SkAAClip& aaRgn() const { SkASSERT(!fIsBW); return fAA; } + + bool isEmpty() const { + SkASSERT(this->computeIsEmpty() == fIsEmpty); + return fIsEmpty; + } + + bool isRect() const { + SkASSERT(this->computeIsRect() == fIsRect); + return fIsRect; + } + + bool isComplex() const { + return fIsBW ? fBW.isComplex() : !fAA.isEmpty(); + } + const SkIRect& getBounds() const { + return fIsBW ? fBW.getBounds() : fAA.getBounds(); + } + + bool setEmpty(); + bool setRect(const SkIRect&); + + bool op(const SkIRect&, SkClipOp); + bool op(const SkRegion&, SkClipOp); + bool op(const SkRect&, const SkMatrix& matrix, SkClipOp, bool doAA); + bool op(const SkRRect&, const SkMatrix& matrix, SkClipOp, bool doAA); + bool op(const SkPath&, const SkMatrix& matrix, SkClipOp, bool doAA); + bool op(sk_sp); + + void translate(int dx, int dy, SkRasterClip* dst) const; + + bool quickContains(const SkIRect& rect) const { + return fIsBW ? fBW.quickContains(rect) : fAA.quickContains(rect); + } + + /** + * Return true if this region is empty, or if the specified rectangle does + * not intersect the region. Returning false is not a guarantee that they + * intersect, but returning true is a guarantee that they do not. + */ + bool quickReject(const SkIRect& rect) const { + return !SkIRect::Intersects(this->getBounds(), rect); + } + +#ifdef SK_DEBUG + void validate() const; +#else + void validate() const {} +#endif + + sk_sp clipShader() const { return fShader; } + +private: + SkRegion fBW; + SkAAClip fAA; + bool fIsBW; + // these 2 are caches based on querying the right obj based on fIsBW + bool fIsEmpty; + bool fIsRect; + // if present, this augments the clip, not replaces it + sk_sp fShader; + + bool computeIsEmpty() const { + return fIsBW ? fBW.isEmpty() : fAA.isEmpty(); + } + + bool computeIsRect() const { + return fIsBW ? fBW.isRect() : fAA.isRect(); + } + + bool updateCacheAndReturnNonEmpty(bool detectAARect = true) { + fIsEmpty = this->computeIsEmpty(); + + // detect that our computed AA is really just a (hard-edged) rect + if (detectAARect && !fIsEmpty && !fIsBW && fAA.isRect()) { + fBW.setRect(fAA.getBounds()); + fAA.setEmpty(); // don't need this anymore + fIsBW = true; + } + + fIsRect = this->computeIsRect(); + return !fIsEmpty; + } + + void convertToAA(); + + bool op(const SkRasterClip&, SkClipOp); +}; + +class SkAutoRasterClipValidate : SkNoncopyable { +public: + SkAutoRasterClipValidate(const SkRasterClip& rc) : fRC(rc) { + fRC.validate(); + } + ~SkAutoRasterClipValidate() { + fRC.validate(); + } +private: + const SkRasterClip& fRC; +}; + +#ifdef SK_DEBUG + #define AUTO_RASTERCLIP_VALIDATE(rc) SkAutoRasterClipValidate arcv(rc) +#else + #define AUTO_RASTERCLIP_VALIDATE(rc) +#endif + +/////////////////////////////////////////////////////////////////////////////// + +/** + * Encapsulates the logic of deciding if we need to change/wrap the blitter + * for aaclipping. If so, getRgn and getBlitter return modified values. If + * not, they return the raw blitter and (bw) clip region. + * + * We need to keep the constructor/destructor cost as small as possible, so we + * can freely put this on the stack, and not pay too much for the case when + * we're really BW anyways. + */ +class SkAAClipBlitterWrapper { +public: + SkAAClipBlitterWrapper(); + SkAAClipBlitterWrapper(const SkRasterClip&, SkBlitter*); + SkAAClipBlitterWrapper(const SkAAClip*, SkBlitter*); + + void init(const SkRasterClip&, SkBlitter*); + + const SkIRect& getBounds() const { + SkASSERT(fClipRgn); + return fClipRgn->getBounds(); + } + const SkRegion& getRgn() const { + SkASSERT(fClipRgn); + return *fClipRgn; + } + SkBlitter* getBlitter() { + SkASSERT(fBlitter); + return fBlitter; + } + +private: + SkRegion fBWRgn; + SkAAClipBlitter fAABlitter; + // what we return + const SkRegion* fClipRgn; + SkBlitter* fBlitter; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkRasterClipStack.h b/gfx/skia/skia/src/core/SkRasterClipStack.h new file mode 100644 index 0000000000..0d73122d4d --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterClipStack.h @@ -0,0 +1,123 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRasterClipStack_DEFINED +#define SkRasterClipStack_DEFINED + +#include "include/core/SkClipOp.h" +#include "src/base/SkTBlockList.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkScan.h" + +class SkRasterClipStack : SkNoncopyable { +public: + SkRasterClipStack(int width, int height) + : fRootBounds(SkIRect::MakeWH(width, height)) + , fDisableAA(SkScan::PathRequiresTiling(fRootBounds)) { + fStack.emplace_back(SkRasterClip(fRootBounds)); + SkASSERT(fStack.count() == 1); + } + + void setNewSize(int w, int h) { + fRootBounds.setXYWH(0, 0, w, h); + + SkASSERT(fStack.count() == 1); + Rec& rec = fStack.back(); + SkASSERT(rec.fDeferredCount == 0); + rec.fRC.setRect(fRootBounds); + } + + const SkRasterClip& rc() const { return fStack.back().fRC; } + + void save() { + SkDEBUGCODE(fCounter += 1); + SkASSERT(fStack.back().fDeferredCount >= 0); + fStack.back().fDeferredCount += 1; + } + + void restore() { + SkDEBUGCODE(fCounter -= 1); + SkASSERT(fCounter >= 0); + + if (--fStack.back().fDeferredCount < 0) { + SkASSERT(fStack.back().fDeferredCount == -1); + SkASSERT(fStack.count() > 1); + fStack.pop_back(); + } + } + + void clipRect(const SkMatrix& ctm, const SkRect& rect, SkClipOp op, bool aa) { + this->writable_rc().op(rect, ctm, op, this->finalAA(aa)); + this->validate(); + } + + void clipRRect(const SkMatrix& ctm, const SkRRect& rrect, SkClipOp op, bool aa) { + this->writable_rc().op(rrect, ctm, op, this->finalAA(aa)); + this->validate(); + } + + void clipPath(const SkMatrix& ctm, const SkPath& path, SkClipOp op, bool aa) { + this->writable_rc().op(path, ctm, op, this->finalAA(aa)); + this->validate(); + } + + void clipShader(sk_sp sh) { + this->writable_rc().op(std::move(sh)); + this->validate(); + } + + void clipRegion(const SkRegion& rgn, SkClipOp op) { + this->writable_rc().op(rgn, op); + this->validate(); + } + + void replaceClip(const SkIRect& rect) { + SkIRect devRect = rect; + if (!devRect.intersect(fRootBounds)) { + this->writable_rc().setEmpty(); + } else { + this->writable_rc().setRect(devRect); + } + } + + void validate() const { +#ifdef SK_DEBUG + const SkRasterClip& clip = this->rc(); + if (fRootBounds.isEmpty()) { + SkASSERT(clip.isEmpty()); + } else if (!clip.isEmpty()) { + SkASSERT(fRootBounds.contains(clip.getBounds())); + } +#endif + } + +private: + struct Rec { + SkRasterClip fRC; + int fDeferredCount; // 0 for a "normal" entry + + Rec(const SkRasterClip& rc) : fRC(rc), fDeferredCount(0) {} + }; + + SkTBlockList fStack; + SkIRect fRootBounds; + bool fDisableAA; + SkDEBUGCODE(int fCounter = 0); + + SkRasterClip& writable_rc() { + SkASSERT(fStack.back().fDeferredCount >= 0); + if (fStack.back().fDeferredCount > 0) { + fStack.back().fDeferredCount -= 1; + fStack.emplace_back(fStack.back().fRC); + } + return fStack.back().fRC; + } + + bool finalAA(bool aa) const { return aa && !fDisableAA; } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkRasterPipeline.cpp b/gfx/skia/skia/src/core/SkRasterPipeline.cpp new file mode 100644 index 0000000000..df6ffdb064 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterPipeline.cpp @@ -0,0 +1,499 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkRasterPipeline.h" + +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/private/base/SkTemplates.h" +#include "modules/skcms/skcms.h" +#include "src/base/SkVx.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkOpts.h" + +#include +#include +#include + +using namespace skia_private; +using Op = SkRasterPipelineOp; + +bool gForceHighPrecisionRasterPipeline; + +SkRasterPipeline::SkRasterPipeline(SkArenaAlloc* alloc) : fAlloc(alloc) { + this->reset(); +} +void SkRasterPipeline::reset() { + fRewindCtx = nullptr; + fStages = nullptr; + fNumStages = 0; +} + +void SkRasterPipeline::append(SkRasterPipelineOp op, void* ctx) { + SkASSERT(op != Op::uniform_color); // Please use append_constant_color(). + SkASSERT(op != Op::unbounded_uniform_color); // Please use append_constant_color(). + SkASSERT(op != Op::set_rgb); // Please use append_set_rgb(). + SkASSERT(op != Op::unbounded_set_rgb); // Please use append_set_rgb(). + SkASSERT(op != Op::parametric); // Please use append_transfer_function(). + SkASSERT(op != Op::gamma_); // Please use append_transfer_function(). + SkASSERT(op != Op::PQish); // Please use append_transfer_function(). + SkASSERT(op != Op::HLGish); // Please use append_transfer_function(). + SkASSERT(op != Op::HLGinvish); // Please use append_transfer_function(). + SkASSERT(op != Op::stack_checkpoint); // Please use append_stack_rewind(). + SkASSERT(op != Op::stack_rewind); // Please use append_stack_rewind(). + this->unchecked_append(op, ctx); +} +void SkRasterPipeline::unchecked_append(SkRasterPipelineOp op, void* ctx) { + fStages = fAlloc->make(StageList{fStages, op, ctx}); + fNumStages += 1; +} +void SkRasterPipeline::append(SkRasterPipelineOp op, uintptr_t ctx) { + void* ptrCtx; + memcpy(&ptrCtx, &ctx, sizeof(ctx)); + this->append(op, ptrCtx); +} + +void SkRasterPipeline::extend(const SkRasterPipeline& src) { + if (src.empty()) { + return; + } + // Create a rewind context if `src` has one already, but we don't. If we _do_ already have one, + // we need to keep it, since we already have rewind ops that reference it. Either way, we need + // to rewrite all the rewind ops to point to _our_ rewind context; we only get that checkpoint. + if (src.fRewindCtx && !fRewindCtx) { + fRewindCtx = fAlloc->make(); + } + auto stages = fAlloc->makeArrayDefault(src.fNumStages); + + int n = src.fNumStages; + const StageList* st = src.fStages; + while (n --> 1) { + stages[n] = *st; + stages[n].prev = &stages[n-1]; + + if (stages[n].stage == Op::stack_rewind) { + // We make sure that all stack rewinds use _our_ stack context. + stages[n].ctx = fRewindCtx; + } + + st = st->prev; + } + stages[0] = *st; + stages[0].prev = fStages; + + fStages = &stages[src.fNumStages - 1]; + fNumStages += src.fNumStages; +} + +const char* SkRasterPipeline::GetOpName(SkRasterPipelineOp op) { + const char* name = ""; + switch (op) { + #define M(x) case Op::x: name = #x; break; + SK_RASTER_PIPELINE_OPS_ALL(M) + #undef M + } + return name; +} + +void SkRasterPipeline::dump() const { + SkDebugf("SkRasterPipeline, %d stages\n", fNumStages); + std::vector stages; + for (auto st = fStages; st; st = st->prev) { + stages.push_back(GetOpName(st->stage)); + } + std::reverse(stages.begin(), stages.end()); + for (const char* name : stages) { + SkDebugf("\t%s\n", name); + } + SkDebugf("\n"); +} + +void SkRasterPipeline::append_set_rgb(SkArenaAlloc* alloc, const float rgb[3]) { + auto arg = alloc->makeArrayDefault(3); + arg[0] = rgb[0]; + arg[1] = rgb[1]; + arg[2] = rgb[2]; + + auto op = Op::unbounded_set_rgb; + if (0 <= rgb[0] && rgb[0] <= 1 && + 0 <= rgb[1] && rgb[1] <= 1 && + 0 <= rgb[2] && rgb[2] <= 1) + { + op = Op::set_rgb; + } + + this->unchecked_append(op, arg); +} + +void SkRasterPipeline::append_constant_color(SkArenaAlloc* alloc, const float rgba[4]) { + // r,g,b might be outside [0,1], but alpha should probably always be in [0,1]. + SkASSERT(0 <= rgba[3] && rgba[3] <= 1); + + if (rgba[0] == 0 && rgba[1] == 0 && rgba[2] == 0 && rgba[3] == 1) { + this->append(Op::black_color); + } else if (rgba[0] == 1 && rgba[1] == 1 && rgba[2] == 1 && rgba[3] == 1) { + this->append(Op::white_color); + } else { + auto ctx = alloc->make(); + skvx::float4 color = skvx::float4::Load(rgba); + color.store(&ctx->r); + + // uniform_color requires colors in range and can go lowp, + // while unbounded_uniform_color supports out-of-range colors too but not lowp. + if (0 <= rgba[0] && rgba[0] <= rgba[3] && + 0 <= rgba[1] && rgba[1] <= rgba[3] && + 0 <= rgba[2] && rgba[2] <= rgba[3]) { + // To make loads more direct, we store 8-bit values in 16-bit slots. + color = color * 255.0f + 0.5f; + ctx->rgba[0] = (uint16_t)color[0]; + ctx->rgba[1] = (uint16_t)color[1]; + ctx->rgba[2] = (uint16_t)color[2]; + ctx->rgba[3] = (uint16_t)color[3]; + this->unchecked_append(Op::uniform_color, ctx); + } else { + this->unchecked_append(Op::unbounded_uniform_color, ctx); + } + } +} + +void SkRasterPipeline::append_matrix(SkArenaAlloc* alloc, const SkMatrix& matrix) { + SkMatrix::TypeMask mt = matrix.getType(); + + if (mt == SkMatrix::kIdentity_Mask) { + return; + } + if (mt == SkMatrix::kTranslate_Mask) { + float* trans = alloc->makeArrayDefault(2); + trans[0] = matrix.getTranslateX(); + trans[1] = matrix.getTranslateY(); + this->append(Op::matrix_translate, trans); + } else if ((mt | (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) == + (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) { + float* scaleTrans = alloc->makeArrayDefault(4); + scaleTrans[0] = matrix.getScaleX(); + scaleTrans[1] = matrix.getScaleY(); + scaleTrans[2] = matrix.getTranslateX(); + scaleTrans[3] = matrix.getTranslateY(); + this->append(Op::matrix_scale_translate, scaleTrans); + } else { + float* storage = alloc->makeArrayDefault(9); + matrix.get9(storage); + if (!matrix.hasPerspective()) { + // note: asAffine and the 2x3 stage really only need 6 entries + this->append(Op::matrix_2x3, storage); + } else { + this->append(Op::matrix_perspective, storage); + } + } +} + +void SkRasterPipeline::append_load(SkColorType ct, const SkRasterPipeline_MemoryCtx* ctx) { + switch (ct) { + case kUnknown_SkColorType: SkASSERT(false); break; + + case kAlpha_8_SkColorType: this->append(Op::load_a8, ctx); break; + case kA16_unorm_SkColorType: this->append(Op::load_a16, ctx); break; + case kA16_float_SkColorType: this->append(Op::load_af16, ctx); break; + case kRGB_565_SkColorType: this->append(Op::load_565, ctx); break; + case kARGB_4444_SkColorType: this->append(Op::load_4444, ctx); break; + case kR8G8_unorm_SkColorType: this->append(Op::load_rg88, ctx); break; + case kR16G16_unorm_SkColorType: this->append(Op::load_rg1616, ctx); break; + case kR16G16_float_SkColorType: this->append(Op::load_rgf16, ctx); break; + case kRGBA_8888_SkColorType: this->append(Op::load_8888, ctx); break; + case kRGBA_1010102_SkColorType: this->append(Op::load_1010102, ctx); break; + case kR16G16B16A16_unorm_SkColorType:this->append(Op::load_16161616,ctx); break; + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: this->append(Op::load_f16, ctx); break; + case kRGBA_F32_SkColorType: this->append(Op::load_f32, ctx); break; + + case kGray_8_SkColorType: this->append(Op::load_a8, ctx); + this->append(Op::alpha_to_gray); + break; + + case kR8_unorm_SkColorType: this->append(Op::load_a8, ctx); + this->append(Op::alpha_to_red); + break; + + case kRGB_888x_SkColorType: this->append(Op::load_8888, ctx); + this->append(Op::force_opaque); + break; + + case kBGRA_1010102_SkColorType: this->append(Op::load_1010102, ctx); + this->append(Op::swap_rb); + break; + + case kRGB_101010x_SkColorType: this->append(Op::load_1010102, ctx); + this->append(Op::force_opaque); + break; + + case kBGR_101010x_SkColorType: this->append(Op::load_1010102, ctx); + this->append(Op::force_opaque); + this->append(Op::swap_rb); + break; + + case kBGR_101010x_XR_SkColorType: this->append(Op::load_1010102_xr, ctx); + this->append(Op::force_opaque); + this->append(Op::swap_rb); + break; + + case kBGRA_8888_SkColorType: this->append(Op::load_8888, ctx); + this->append(Op::swap_rb); + break; + + case kSRGBA_8888_SkColorType: + this->append(Op::load_8888, ctx); + this->append_transfer_function(*skcms_sRGB_TransferFunction()); + break; + } +} + +void SkRasterPipeline::append_load_dst(SkColorType ct, const SkRasterPipeline_MemoryCtx* ctx) { + switch (ct) { + case kUnknown_SkColorType: SkASSERT(false); break; + + case kAlpha_8_SkColorType: this->append(Op::load_a8_dst, ctx); break; + case kA16_unorm_SkColorType: this->append(Op::load_a16_dst, ctx); break; + case kA16_float_SkColorType: this->append(Op::load_af16_dst, ctx); break; + case kRGB_565_SkColorType: this->append(Op::load_565_dst, ctx); break; + case kARGB_4444_SkColorType: this->append(Op::load_4444_dst, ctx); break; + case kR8G8_unorm_SkColorType: this->append(Op::load_rg88_dst, ctx); break; + case kR16G16_unorm_SkColorType: this->append(Op::load_rg1616_dst, ctx); break; + case kR16G16_float_SkColorType: this->append(Op::load_rgf16_dst, ctx); break; + case kRGBA_8888_SkColorType: this->append(Op::load_8888_dst, ctx); break; + case kRGBA_1010102_SkColorType: this->append(Op::load_1010102_dst, ctx); break; + case kR16G16B16A16_unorm_SkColorType: this->append(Op::load_16161616_dst,ctx); break; + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: this->append(Op::load_f16_dst, ctx); break; + case kRGBA_F32_SkColorType: this->append(Op::load_f32_dst, ctx); break; + + case kGray_8_SkColorType: this->append(Op::load_a8_dst, ctx); + this->append(Op::alpha_to_gray_dst); + break; + + case kR8_unorm_SkColorType: this->append(Op::load_a8_dst, ctx); + this->append(Op::alpha_to_red_dst); + break; + + case kRGB_888x_SkColorType: this->append(Op::load_8888_dst, ctx); + this->append(Op::force_opaque_dst); + break; + + case kBGRA_1010102_SkColorType: this->append(Op::load_1010102_dst, ctx); + this->append(Op::swap_rb_dst); + break; + + case kRGB_101010x_SkColorType: this->append(Op::load_1010102_dst, ctx); + this->append(Op::force_opaque_dst); + break; + + case kBGR_101010x_SkColorType: this->append(Op::load_1010102_dst, ctx); + this->append(Op::force_opaque_dst); + this->append(Op::swap_rb_dst); + break; + + case kBGR_101010x_XR_SkColorType: this->append(Op::load_1010102_xr_dst, ctx); + this->append(Op::force_opaque_dst); + this->append(Op::swap_rb_dst); + break; + + case kBGRA_8888_SkColorType: this->append(Op::load_8888_dst, ctx); + this->append(Op::swap_rb_dst); + break; + + case kSRGBA_8888_SkColorType: + // TODO: We could remove the double-swap if we had _dst versions of all the TF stages + this->append(Op::load_8888_dst, ctx); + this->append(Op::swap_src_dst); + this->append_transfer_function(*skcms_sRGB_TransferFunction()); + this->append(Op::swap_src_dst); + break; + } +} + +void SkRasterPipeline::append_store(SkColorType ct, const SkRasterPipeline_MemoryCtx* ctx) { + switch (ct) { + case kUnknown_SkColorType: SkASSERT(false); break; + + case kAlpha_8_SkColorType: this->append(Op::store_a8, ctx); break; + case kR8_unorm_SkColorType: this->append(Op::store_r8, ctx); break; + case kA16_unorm_SkColorType: this->append(Op::store_a16, ctx); break; + case kA16_float_SkColorType: this->append(Op::store_af16, ctx); break; + case kRGB_565_SkColorType: this->append(Op::store_565, ctx); break; + case kARGB_4444_SkColorType: this->append(Op::store_4444, ctx); break; + case kR8G8_unorm_SkColorType: this->append(Op::store_rg88, ctx); break; + case kR16G16_unorm_SkColorType: this->append(Op::store_rg1616, ctx); break; + case kR16G16_float_SkColorType: this->append(Op::store_rgf16, ctx); break; + case kRGBA_8888_SkColorType: this->append(Op::store_8888, ctx); break; + case kRGBA_1010102_SkColorType: this->append(Op::store_1010102, ctx); break; + case kR16G16B16A16_unorm_SkColorType: this->append(Op::store_16161616,ctx); break; + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: this->append(Op::store_f16, ctx); break; + case kRGBA_F32_SkColorType: this->append(Op::store_f32, ctx); break; + + case kRGB_888x_SkColorType: this->append(Op::force_opaque); + this->append(Op::store_8888, ctx); + break; + + case kBGRA_1010102_SkColorType: this->append(Op::swap_rb); + this->append(Op::store_1010102, ctx); + break; + + case kRGB_101010x_SkColorType: this->append(Op::force_opaque); + this->append(Op::store_1010102, ctx); + break; + + case kBGR_101010x_SkColorType: this->append(Op::force_opaque); + this->append(Op::swap_rb); + this->append(Op::store_1010102, ctx); + break; + + case kBGR_101010x_XR_SkColorType: this->append(Op::force_opaque); + this->append(Op::swap_rb); + this->append(Op::store_1010102_xr, ctx); + break; + + case kGray_8_SkColorType: this->append(Op::bt709_luminance_or_luma_to_alpha); + this->append(Op::store_a8, ctx); + break; + + case kBGRA_8888_SkColorType: this->append(Op::swap_rb); + this->append(Op::store_8888, ctx); + break; + + case kSRGBA_8888_SkColorType: + this->append_transfer_function(*skcms_sRGB_Inverse_TransferFunction()); + this->append(Op::store_8888, ctx); + break; + } +} + +void SkRasterPipeline::append_transfer_function(const skcms_TransferFunction& tf) { + void* ctx = const_cast(static_cast(&tf)); + switch (skcms_TransferFunction_getType(&tf)) { + case skcms_TFType_Invalid: SkASSERT(false); break; + + case skcms_TFType_sRGBish: + if (tf.a == 1 && tf.b == 0 && tf.c == 0 && tf.d == 0 && tf.e == 0 && tf.f == 0) { + this->unchecked_append(Op::gamma_, ctx); + } else { + this->unchecked_append(Op::parametric, ctx); + } + break; + case skcms_TFType_PQish: this->unchecked_append(Op::PQish, ctx); break; + case skcms_TFType_HLGish: this->unchecked_append(Op::HLGish, ctx); break; + case skcms_TFType_HLGinvish: this->unchecked_append(Op::HLGinvish, ctx); break; + } +} + +// GPUs clamp all color channels to the limits of the format just before the blend step. To match +// that auto-clamp, the RP blitter uses this helper immediately before appending blending stages. +void SkRasterPipeline::append_clamp_if_normalized(const SkImageInfo& info) { + if (SkColorTypeIsNormalized(info.colorType())) { + this->unchecked_append(Op::clamp_01, nullptr); + } +} + +void SkRasterPipeline::append_stack_rewind() { + if (!fRewindCtx) { + fRewindCtx = fAlloc->make(); + } + this->unchecked_append(Op::stack_rewind, fRewindCtx); +} + +static void prepend_to_pipeline(SkRasterPipelineStage*& ip, SkOpts::StageFn stageFn, void* ctx) { + --ip; + ip->fn = stageFn; + ip->ctx = ctx; +} + +bool SkRasterPipeline::build_lowp_pipeline(SkRasterPipelineStage* ip) const { + if (gForceHighPrecisionRasterPipeline || fRewindCtx) { + return false; + } + // Stages are stored backwards in fStages; to compensate, we assemble the pipeline in reverse + // here, back to front. + prepend_to_pipeline(ip, SkOpts::just_return_lowp, /*ctx=*/nullptr); + for (const StageList* st = fStages; st; st = st->prev) { + int opIndex = (int)st->stage; + if (opIndex >= kNumRasterPipelineLowpOps || !SkOpts::ops_lowp[opIndex]) { + // This program contains a stage that doesn't exist in lowp. + return false; + } + prepend_to_pipeline(ip, SkOpts::ops_lowp[opIndex], st->ctx); + } + return true; +} + +void SkRasterPipeline::build_highp_pipeline(SkRasterPipelineStage* ip) const { + // We assemble the pipeline in reverse, since the stage list is stored backwards. + prepend_to_pipeline(ip, SkOpts::just_return_highp, /*ctx=*/nullptr); + for (const StageList* st = fStages; st; st = st->prev) { + int opIndex = (int)st->stage; + prepend_to_pipeline(ip, SkOpts::ops_highp[opIndex], st->ctx); + } + + // stack_checkpoint and stack_rewind are only implemented in highp. We only need these stages + // when generating long (or looping) pipelines from SkSL. The other stages used by the SkSL + // Raster Pipeline generator will only have highp implementations, because we can't execute SkSL + // code without floating point. + if (fRewindCtx) { + const int rewindIndex = (int)Op::stack_checkpoint; + prepend_to_pipeline(ip, SkOpts::ops_highp[rewindIndex], fRewindCtx); + } +} + +SkRasterPipeline::StartPipelineFn SkRasterPipeline::build_pipeline( + SkRasterPipelineStage* ip) const { + // We try to build a lowp pipeline first; if that fails, we fall back to a highp float pipeline. + if (this->build_lowp_pipeline(ip)) { + return SkOpts::start_pipeline_lowp; + } + + this->build_highp_pipeline(ip); + return SkOpts::start_pipeline_highp; +} + +int SkRasterPipeline::stages_needed() const { + // Add 1 to budget for a `just_return` stage at the end. + int stages = fNumStages + 1; + + // If we have any stack_rewind stages, we will need to inject a stack_checkpoint stage. + if (fRewindCtx) { + stages += 1; + } + return stages; +} + +void SkRasterPipeline::run(size_t x, size_t y, size_t w, size_t h) const { + if (this->empty()) { + return; + } + + int stagesNeeded = this->stages_needed(); + + // Best to not use fAlloc here... we can't bound how often run() will be called. + AutoSTMalloc<32, SkRasterPipelineStage> program(stagesNeeded); + + auto start_pipeline = this->build_pipeline(program.get() + stagesNeeded); + start_pipeline(x,y,x+w,y+h, program.get()); +} + +std::function SkRasterPipeline::compile() const { + if (this->empty()) { + return [](size_t, size_t, size_t, size_t) {}; + } + + int stagesNeeded = this->stages_needed(); + + SkRasterPipelineStage* program = fAlloc->makeArray(stagesNeeded); + + auto start_pipeline = this->build_pipeline(program + stagesNeeded); + return [=](size_t x, size_t y, size_t w, size_t h) { + start_pipeline(x,y,x+w,y+h, program); + }; +} diff --git a/gfx/skia/skia/src/core/SkRasterPipeline.h b/gfx/skia/skia/src/core/SkRasterPipeline.h new file mode 100644 index 0000000000..766bb0c11d --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterPipeline.h @@ -0,0 +1,158 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRasterPipeline_DEFINED +#define SkRasterPipeline_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMacros.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkRasterPipelineOpContexts.h" +#include "src/core/SkRasterPipelineOpList.h" + +#include +#include +#include + +class SkMatrix; +enum SkColorType : int; +struct SkImageInfo; +struct skcms_TransferFunction; + +#if __has_cpp_attribute(clang::musttail) && !defined(__EMSCRIPTEN__) && !defined(SK_CPU_ARM32) + #define SK_HAS_MUSTTAIL 1 +#else + #define SK_HAS_MUSTTAIL 0 +#endif + +/** + * SkRasterPipeline provides a cheap way to chain together a pixel processing pipeline. + * + * It's particularly designed for situations where the potential pipeline is extremely + * combinatoric: {N dst formats} x {M source formats} x {K mask formats} x {C transfer modes} ... + * No one wants to write specialized routines for all those combinations, and if we did, we'd + * end up bloating our code size dramatically. SkRasterPipeline stages can be chained together + * at runtime, so we can scale this problem linearly rather than combinatorically. + * + * Each stage is represented by a function conforming to a common interface and by an + * arbitrary context pointer. The stage function arguments and calling convention are + * designed to maximize the amount of data we can pass along the pipeline cheaply, and + * vary depending on CPU feature detection. + */ + +// Raster pipeline programs are stored as a contiguous array of SkRasterPipelineStages. +SK_BEGIN_REQUIRE_DENSE +struct SkRasterPipelineStage { + // A function pointer from `stages_lowp` or `stages_highp`. The exact function pointer type + // varies depending on architecture (specifically, see `Stage` in SkRasterPipeline_opts.h). + void (*fn)(); + + // Data used by the stage function. Most context structures are declared at the top of + // SkRasterPipeline.h, and have names ending in Ctx (e.g. "SkRasterPipeline_SamplerCtx"). + void* ctx; +}; +SK_END_REQUIRE_DENSE + +class SkRasterPipeline { +public: + explicit SkRasterPipeline(SkArenaAlloc*); + + SkRasterPipeline(const SkRasterPipeline&) = delete; + SkRasterPipeline(SkRasterPipeline&&) = default; + + SkRasterPipeline& operator=(const SkRasterPipeline&) = delete; + SkRasterPipeline& operator=(SkRasterPipeline&&) = default; + + void reset(); + + void append(SkRasterPipelineOp, void* = nullptr); + void append(SkRasterPipelineOp op, const void* ctx) { this->append(op,const_cast(ctx)); } + void append(SkRasterPipelineOp, uintptr_t ctx); + + // Append all stages to this pipeline. + void extend(const SkRasterPipeline&); + + // Runs the pipeline in 2d from (x,y) inclusive to (x+w,y+h) exclusive. + void run(size_t x, size_t y, size_t w, size_t h) const; + + // Allocates a thunk which amortizes run() setup cost in alloc. + std::function compile() const; + + // Callers can inspect the stage list for debugging purposes. + struct StageList { + StageList* prev; + SkRasterPipelineOp stage; + void* ctx; + }; + + static const char* GetOpName(SkRasterPipelineOp op); + const StageList* getStageList() const { return fStages; } + int getNumStages() const { return fNumStages; } + + // Prints the entire StageList using SkDebugf. + void dump() const; + + // Appends a stage for the specified matrix. + // Tries to optimize the stage by analyzing the type of matrix. + void append_matrix(SkArenaAlloc*, const SkMatrix&); + + // Appends a stage for a constant uniform color. + // Tries to optimize the stage based on the color. + void append_constant_color(SkArenaAlloc*, const float rgba[4]); + + void append_constant_color(SkArenaAlloc* alloc, const SkColor4f& color) { + this->append_constant_color(alloc, color.vec()); + } + + // Like append_constant_color() but only affecting r,g,b, ignoring the alpha channel. + void append_set_rgb(SkArenaAlloc*, const float rgb[3]); + + void append_set_rgb(SkArenaAlloc* alloc, const SkColor4f& color) { + this->append_set_rgb(alloc, color.vec()); + } + + void append_load (SkColorType, const SkRasterPipeline_MemoryCtx*); + void append_load_dst(SkColorType, const SkRasterPipeline_MemoryCtx*); + void append_store (SkColorType, const SkRasterPipeline_MemoryCtx*); + + void append_clamp_if_normalized(const SkImageInfo&); + + void append_transfer_function(const skcms_TransferFunction&); + + void append_stack_rewind(); + + bool empty() const { return fStages == nullptr; } + +private: + bool build_lowp_pipeline(SkRasterPipelineStage* ip) const; + void build_highp_pipeline(SkRasterPipelineStage* ip) const; + + using StartPipelineFn = void(*)(size_t,size_t,size_t,size_t, SkRasterPipelineStage* program); + StartPipelineFn build_pipeline(SkRasterPipelineStage*) const; + + void unchecked_append(SkRasterPipelineOp, void*); + int stages_needed() const; + + SkArenaAlloc* fAlloc; + SkRasterPipeline_RewindCtx* fRewindCtx; + StageList* fStages; + int fNumStages; +}; + +template +class SkRasterPipeline_ : public SkRasterPipeline { +public: + SkRasterPipeline_() + : SkRasterPipeline(&fBuiltinAlloc) {} + +private: + SkSTArenaAlloc fBuiltinAlloc; +}; + + +#endif//SkRasterPipeline_DEFINED diff --git a/gfx/skia/skia/src/core/SkRasterPipelineBlitter.cpp b/gfx/skia/skia/src/core/SkRasterPipelineBlitter.cpp new file mode 100644 index 0000000000..178f6d9dcd --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterPipelineBlitter.cpp @@ -0,0 +1,607 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColor.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkShader.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkUtils.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkOpts.h" +#include "src/core/SkRasterPipeline.h" +#include "src/shaders/SkShaderBase.h" + +#define SK_BLITTER_TRACE_IS_RASTER_PIPELINE +#include "src/utils/SkBlitterTrace.h" + +class SkRasterPipelineBlitter final : public SkBlitter { +public: + // This is our common entrypoint for creating the blitter once we've sorted out shaders. + static SkBlitter* Create(const SkPixmap& dst, + const SkPaint& paint, + const SkColor4f& dstPaintColor, + SkArenaAlloc* alloc, + const SkRasterPipeline& shaderPipeline, + bool is_opaque, + bool is_constant, + sk_sp clipShader); + + SkRasterPipelineBlitter(SkPixmap dst, + SkArenaAlloc* alloc) + : fDst(dst) + , fAlloc(alloc) + , fColorPipeline(alloc) + , fBlendPipeline(alloc) + {} + + void blitH (int x, int y, int w) override; + void blitAntiH (int x, int y, const SkAlpha[], const int16_t[]) override; + void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override; + void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override; + void blitMask (const SkMask&, const SkIRect& clip) override; + void blitRect (int x, int y, int width, int height) override; + void blitV (int x, int y, int height, SkAlpha alpha) override; + +private: + void blitRectWithTrace(int x, int y, int w, int h, bool trace); + void append_load_dst (SkRasterPipeline*) const; + void append_store (SkRasterPipeline*) const; + + // these check internally, and only append if there was a native clipShader + void append_clip_scale (SkRasterPipeline*) const; + void append_clip_lerp (SkRasterPipeline*) const; + + SkPixmap fDst; + SkArenaAlloc* fAlloc; + SkRasterPipeline fColorPipeline; + SkRasterPipeline fBlendPipeline; + // If the blender is a blend-mode, we retain that information for late-stage optimizations + std::optional fBlendMode; + // set to pipeline storage (for alpha) if we have a clipShader + void* fClipShaderBuffer = nullptr; // "native" : float or U16 + + SkRasterPipeline_MemoryCtx + fDstPtr = {nullptr,0}, // Always points to the top-left of fDst. + fMaskPtr = {nullptr,0}; // Updated each call to blitMask(). + SkRasterPipeline_EmbossCtx fEmbossCtx; // Used only for k3D_Format masks. + + // We may be able to specialize blitH() or blitRect() into a memset. + void (*fMemset2D)(SkPixmap*, int x,int y, int w,int h, uint64_t color) = nullptr; + uint64_t fMemsetColor = 0; // Big enough for largest memsettable dst format, F16. + + // Built lazily on first use. + std::function fBlitRect, + fBlitAntiH, + fBlitMaskA8, + fBlitMaskLCD16, + fBlitMask3D; + + // These values are pointed to by the blit pipelines above, + // which allows us to adjust them from call to call. + float fCurrentCoverage = 0.0f; + float fDitherRate = 0.0f; + + using INHERITED = SkBlitter; +}; + +static SkColor4f paint_color_to_dst(const SkPaint& paint, const SkPixmap& dst) { + SkColor4f paintColor = paint.getColor4f(); + SkColorSpaceXformSteps(sk_srgb_singleton(), kUnpremul_SkAlphaType, + dst.colorSpace(), kUnpremul_SkAlphaType).apply(paintColor.vec()); + return paintColor; +} + +SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap& dst, + const SkPaint& paint, + const SkMatrix& ctm, + SkArenaAlloc* alloc, + sk_sp clipShader, + const SkSurfaceProps& props) { + SkColorSpace* dstCS = dst.colorSpace(); + SkColorType dstCT = dst.colorType(); + SkColor4f dstPaintColor = paint_color_to_dst(paint, dst); + + auto shader = as_SB(paint.getShader()); + + SkRasterPipeline_<256> shaderPipeline; + if (!shader) { + // Having no shader makes things nice and easy... just use the paint color + shaderPipeline.append_constant_color(alloc, dstPaintColor.premul().vec()); + bool is_opaque = dstPaintColor.fA == 1.0f, + is_constant = true; + return SkRasterPipelineBlitter::Create(dst, paint, dstPaintColor, alloc, shaderPipeline, + is_opaque, is_constant, std::move(clipShader)); + } + + bool is_opaque = shader->isOpaque() && dstPaintColor.fA == 1.0f; + bool is_constant = shader->isConstant(); + + if (shader->appendRootStages({&shaderPipeline, alloc, dstCT, dstCS, dstPaintColor, props}, + ctm)) { + if (dstPaintColor.fA != 1.0f) { + shaderPipeline.append(SkRasterPipelineOp::scale_1_float, + alloc->make(dstPaintColor.fA)); + } + return SkRasterPipelineBlitter::Create(dst, paint, dstPaintColor, alloc, shaderPipeline, + is_opaque, is_constant, std::move(clipShader)); + } + + // The shader can't draw with SkRasterPipeline. + return nullptr; +} + +SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap& dst, + const SkPaint& paint, + const SkRasterPipeline& shaderPipeline, + bool is_opaque, + SkArenaAlloc* alloc, + sk_sp clipShader) { + bool is_constant = false; // If this were the case, it'd be better to just set a paint color. + return SkRasterPipelineBlitter::Create(dst, paint, paint_color_to_dst(paint, dst), alloc, + shaderPipeline, is_opaque, is_constant, + std::move(clipShader)); +} + +SkBlitter* SkRasterPipelineBlitter::Create(const SkPixmap& dst, + const SkPaint& paint, + const SkColor4f& dstPaintColor, + SkArenaAlloc* alloc, + const SkRasterPipeline& shaderPipeline, + bool is_opaque, + bool is_constant, + sk_sp clipShader) { + auto blitter = alloc->make(dst, alloc); + + // Our job in this factory is to fill out the blitter's color and blend pipelines. + // The color pipeline is the common front of the full blit pipeline. The blend pipeline is just + // the portion that does the actual blending math (and assumes that src and dst are already + // loaded). + // + // The full blit pipelines are each constructed lazily on first use, and include the color + // pipeline, reading the dst, the blend pipeline, coverage, dithering, and writing the dst. + + // Start with the color pipeline + auto colorPipeline = &blitter->fColorPipeline; + + if (clipShader) { + auto clipP = colorPipeline; + SkColorType clipCT = kRGBA_8888_SkColorType; + SkColorSpace* clipCS = nullptr; + SkSurfaceProps props{}; // default OK; clipShader doesn't render text + SkStageRec rec = {clipP, alloc, clipCT, clipCS, SkColors::kBlack, props}; + if (as_SB(clipShader)->appendRootStages(rec, SkMatrix::I())) { + struct Storage { + // large enough for highp (float) or lowp(U16) + float fA[SkRasterPipeline_kMaxStride]; + }; + auto storage = alloc->make(); + clipP->append(SkRasterPipelineOp::store_src_a, storage->fA); + blitter->fClipShaderBuffer = storage->fA; + is_constant = false; + } else { + return nullptr; + } + } + + // Let's get the shader in first. + colorPipeline->extend(shaderPipeline); + + // If there's a color filter it comes next. + if (auto colorFilter = paint.getColorFilter()) { + SkSurfaceProps props{}; // default OK; colorFilter doesn't render text + SkStageRec rec = { + colorPipeline, alloc, dst.colorType(), dst.colorSpace(), dstPaintColor, props}; + if (!as_CFB(colorFilter)->appendStages(rec, is_opaque)) { + return nullptr; + } + is_opaque = is_opaque && as_CFB(colorFilter)->isAlphaUnchanged(); + } + + // Not all formats make sense to dither (think, F16). We set their dither rate + // to zero. We only dither non-constant shaders, so is_constant won't change here. + if (paint.isDither() && !is_constant) { + switch (dst.info().colorType()) { + case kARGB_4444_SkColorType: + blitter->fDitherRate = 1 / 15.0f; + break; + case kRGB_565_SkColorType: + blitter->fDitherRate = 1 / 63.0f; + break; + case kGray_8_SkColorType: + case kRGB_888x_SkColorType: + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + case kSRGBA_8888_SkColorType: + case kR8_unorm_SkColorType: + blitter->fDitherRate = 1 / 255.0f; + break; + case kRGB_101010x_SkColorType: + case kRGBA_1010102_SkColorType: + case kBGR_101010x_SkColorType: + case kBGRA_1010102_SkColorType: + blitter->fDitherRate = 1 / 1023.0f; + break; + + case kUnknown_SkColorType: + case kAlpha_8_SkColorType: + case kBGR_101010x_XR_SkColorType: + case kRGBA_F16_SkColorType: + case kRGBA_F16Norm_SkColorType: + case kRGBA_F32_SkColorType: + case kR8G8_unorm_SkColorType: + case kA16_float_SkColorType: + case kA16_unorm_SkColorType: + case kR16G16_float_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16B16A16_unorm_SkColorType: + blitter->fDitherRate = 0.0f; + break; + } + if (blitter->fDitherRate > 0.0f) { + colorPipeline->append(SkRasterPipelineOp::dither, &blitter->fDitherRate); + } + } + + // Optimization: A pipeline that's still constant here can collapse back into a constant color. + if (is_constant) { + SkColor4f constantColor; + SkRasterPipeline_MemoryCtx constantColorPtr = { &constantColor, 0 }; + // We could remove this clamp entirely, but if the destination is 8888, doing the clamp + // here allows the color pipeline to still run in lowp (we'll use uniform_color, rather than + // unbounded_uniform_color). + colorPipeline->append_clamp_if_normalized(dst.info()); + colorPipeline->append(SkRasterPipelineOp::store_f32, &constantColorPtr); + colorPipeline->run(0,0,1,1); + colorPipeline->reset(); + colorPipeline->append_constant_color(alloc, constantColor); + + is_opaque = constantColor.fA == 1.0f; + } + + // Now we'll build the blend pipeline + auto blendPipeline = &blitter->fBlendPipeline; + + sk_sp blender = paint.refBlender(); + if (!blender) { + blender = SkBlender::Mode(SkBlendMode::kSrcOver); + } + + // We can strength-reduce SrcOver into Src when opaque. + if (is_opaque && as_BB(blender)->asBlendMode() == SkBlendMode::kSrcOver) { + blender = SkBlender::Mode(SkBlendMode::kSrc); + } + + // When we're drawing a constant color in Src mode, we can sometimes just memset. + // (The previous two optimizations help find more opportunities for this one.) + if (is_constant && as_BB(blender)->asBlendMode() == SkBlendMode::kSrc && + dst.info().bytesPerPixel() <= static_cast(sizeof(blitter->fMemsetColor))) { + // Run our color pipeline all the way through to produce what we'd memset when we can. + // Not all blits can memset, so we need to keep colorPipeline too. + SkRasterPipeline_<256> p; + p.extend(*colorPipeline); + blitter->fDstPtr = SkRasterPipeline_MemoryCtx{&blitter->fMemsetColor, 0}; + blitter->append_store(&p); + p.run(0,0,1,1); + + switch (blitter->fDst.shiftPerPixel()) { + case 0: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) { + void* p = dst->writable_addr(x,y); + while (h --> 0) { + memset(p, c, w); + p = SkTAddOffset(p, dst->rowBytes()); + } + }; break; + + case 1: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) { + SkOpts::rect_memset16(dst->writable_addr16(x,y), c, w, dst->rowBytes(), h); + }; break; + + case 2: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) { + SkOpts::rect_memset32(dst->writable_addr32(x,y), c, w, dst->rowBytes(), h); + }; break; + + case 3: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) { + SkOpts::rect_memset64(dst->writable_addr64(x,y), c, w, dst->rowBytes(), h); + }; break; + + // TODO(F32)? + } + } + + { + SkSurfaceProps props{}; // default OK; blender doesn't render text + SkStageRec rec = { + blendPipeline, alloc, dst.colorType(), dst.colorSpace(), dstPaintColor, props}; + if (!as_BB(blender)->appendStages(rec)) { + return nullptr; + } + blitter->fBlendMode = as_BB(blender)->asBlendMode(); + } + + blitter->fDstPtr = SkRasterPipeline_MemoryCtx{ + blitter->fDst.writable_addr(), + blitter->fDst.rowBytesAsPixels(), + }; + + return blitter; +} + +void SkRasterPipelineBlitter::append_load_dst(SkRasterPipeline* p) const { + p->append_load_dst(fDst.info().colorType(), &fDstPtr); + if (fDst.info().alphaType() == kUnpremul_SkAlphaType) { + p->append(SkRasterPipelineOp::premul_dst); + } +} + +void SkRasterPipelineBlitter::append_store(SkRasterPipeline* p) const { + if (fDst.info().alphaType() == kUnpremul_SkAlphaType) { + p->append(SkRasterPipelineOp::unpremul); + } + p->append_store(fDst.info().colorType(), &fDstPtr); +} + +void SkRasterPipelineBlitter::append_clip_scale(SkRasterPipeline* p) const { + if (fClipShaderBuffer) { + p->append(SkRasterPipelineOp::scale_native, fClipShaderBuffer); + } +} + +void SkRasterPipelineBlitter::append_clip_lerp(SkRasterPipeline* p) const { + if (fClipShaderBuffer) { + p->append(SkRasterPipelineOp::lerp_native, fClipShaderBuffer); + } +} + +void SkRasterPipelineBlitter::blitH(int x, int y, int w) { + this->blitRect(x,y,w,1); +} + +void SkRasterPipelineBlitter::blitRect(int x, int y, int w, int h) { + this->blitRectWithTrace(x, y, w, h, true); +} + +void SkRasterPipelineBlitter::blitRectWithTrace(int x, int y, int w, int h, bool trace) { + if (fMemset2D) { + SK_BLITTER_TRACE_STEP(blitRectByMemset, + trace, + /*scanlines=*/h, + /*pixels=*/w * h); + fMemset2D(&fDst, x,y, w,h, fMemsetColor); + return; + } + + if (!fBlitRect) { + SkRasterPipeline p(fAlloc); + p.extend(fColorPipeline); + p.append_clamp_if_normalized(fDst.info()); + if (fBlendMode == SkBlendMode::kSrcOver + && (fDst.info().colorType() == kRGBA_8888_SkColorType || + fDst.info().colorType() == kBGRA_8888_SkColorType) + && !fDst.colorSpace() + && fDst.info().alphaType() != kUnpremul_SkAlphaType + && fDitherRate == 0.0f) { + if (fDst.info().colorType() == kBGRA_8888_SkColorType) { + p.append(SkRasterPipelineOp::swap_rb); + } + this->append_clip_scale(&p); + p.append(SkRasterPipelineOp::srcover_rgba_8888, &fDstPtr); + } else { + if (fBlendMode != SkBlendMode::kSrc) { + this->append_load_dst(&p); + p.extend(fBlendPipeline); + this->append_clip_lerp(&p); + } else if (fClipShaderBuffer) { + this->append_load_dst(&p); + this->append_clip_lerp(&p); + } + this->append_store(&p); + } + fBlitRect = p.compile(); + } + + SK_BLITTER_TRACE_STEP(blitRect, trace, /*scanlines=*/h, /*pixels=*/w * h); + fBlitRect(x,y,w,h); +} + +void SkRasterPipelineBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) { + if (!fBlitAntiH) { + SkRasterPipeline p(fAlloc); + p.extend(fColorPipeline); + p.append_clamp_if_normalized(fDst.info()); + if (fBlendMode.has_value() && + SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/false)) { + p.append(SkRasterPipelineOp::scale_1_float, &fCurrentCoverage); + this->append_clip_scale(&p); + this->append_load_dst(&p); + p.extend(fBlendPipeline); + } else { + this->append_load_dst(&p); + p.extend(fBlendPipeline); + p.append(SkRasterPipelineOp::lerp_1_float, &fCurrentCoverage); + this->append_clip_lerp(&p); + } + + this->append_store(&p); + fBlitAntiH = p.compile(); + } + + SK_BLITTER_TRACE_STEP(blitAntiH, true, /*scanlines=*/1ul, /*pixels=*/0ul); + for (int16_t run = *runs; run > 0; run = *runs) { + SK_BLITTER_TRACE_STEP_ACCUMULATE(blitAntiH, /*pixels=*/run); + switch (*aa) { + case 0x00: break; + case 0xff:this->blitRectWithTrace(x,y,run, 1, false); break; + default: + fCurrentCoverage = *aa * (1/255.0f); + fBlitAntiH(x,y,run,1); + } + x += run; + runs += run; + aa += run; + } +} + +void SkRasterPipelineBlitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) { + SkIRect clip = {x,y, x+2,y+1}; + uint8_t coverage[] = { (uint8_t)a0, (uint8_t)a1 }; + + SkMask mask; + mask.fImage = coverage; + mask.fBounds = clip; + mask.fRowBytes = 2; + mask.fFormat = SkMask::kA8_Format; + + this->blitMask(mask, clip); +} + +void SkRasterPipelineBlitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) { + SkIRect clip = {x,y, x+1,y+2}; + uint8_t coverage[] = { (uint8_t)a0, (uint8_t)a1 }; + + SkMask mask; + mask.fImage = coverage; + mask.fBounds = clip; + mask.fRowBytes = 1; + mask.fFormat = SkMask::kA8_Format; + + this->blitMask(mask, clip); +} + +void SkRasterPipelineBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + SkIRect clip = {x,y, x+1,y+height}; + + SkMask mask; + mask.fImage = α + mask.fBounds = clip; + mask.fRowBytes = 0; // so we reuse the 1 "row" for all of height + mask.fFormat = SkMask::kA8_Format; + + this->blitMask(mask, clip); +} + +void SkRasterPipelineBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { + if (mask.fFormat == SkMask::kBW_Format) { + // TODO: native BW masks? + return INHERITED::blitMask(mask, clip); + } + + // ARGB and SDF masks shouldn't make it here. + SkASSERT(mask.fFormat == SkMask::kA8_Format + || mask.fFormat == SkMask::kLCD16_Format + || mask.fFormat == SkMask::k3D_Format); + + auto extract_mask_plane = [&mask](int plane, SkRasterPipeline_MemoryCtx* ctx) { + // LCD is 16-bit per pixel; A8 and 3D are 8-bit per pixel. + size_t bpp = mask.fFormat == SkMask::kLCD16_Format ? 2 : 1; + + // Select the right mask plane. Usually plane == 0 and this is just mask.fImage. + auto ptr = (uintptr_t)mask.fImage + + plane * mask.computeImageSize(); + + // Update ctx to point "into" this current mask, but lined up with fDstPtr at (0,0). + // This sort of trickery upsets UBSAN (pointer-overflow) so our ptr must be a uintptr_t. + // mask.fRowBytes is a uint32_t, which would break our addressing math on 64-bit builds. + size_t rowBytes = mask.fRowBytes; + ctx->stride = rowBytes / bpp; + ctx->pixels = (void*)(ptr - mask.fBounds.left() * bpp + - mask.fBounds.top() * rowBytes); + }; + + extract_mask_plane(0, &fMaskPtr); + if (mask.fFormat == SkMask::k3D_Format) { + extract_mask_plane(1, &fEmbossCtx.mul); + extract_mask_plane(2, &fEmbossCtx.add); + } + + // Lazily build whichever pipeline we need, specialized for each mask format. + if (mask.fFormat == SkMask::kA8_Format && !fBlitMaskA8) { + SkRasterPipeline p(fAlloc); + p.extend(fColorPipeline); + p.append_clamp_if_normalized(fDst.info()); + if (fBlendMode.has_value() && + SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/false)) { + p.append(SkRasterPipelineOp::scale_u8, &fMaskPtr); + this->append_clip_scale(&p); + this->append_load_dst(&p); + p.extend(fBlendPipeline); + } else { + this->append_load_dst(&p); + p.extend(fBlendPipeline); + p.append(SkRasterPipelineOp::lerp_u8, &fMaskPtr); + this->append_clip_lerp(&p); + } + this->append_store(&p); + fBlitMaskA8 = p.compile(); + } + if (mask.fFormat == SkMask::kLCD16_Format && !fBlitMaskLCD16) { + SkRasterPipeline p(fAlloc); + p.extend(fColorPipeline); + p.append_clamp_if_normalized(fDst.info()); + if (fBlendMode.has_value() && + SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/true)) { + // Somewhat unusually, scale_565 needs dst loaded first. + this->append_load_dst(&p); + p.append(SkRasterPipelineOp::scale_565, &fMaskPtr); + this->append_clip_scale(&p); + p.extend(fBlendPipeline); + } else { + this->append_load_dst(&p); + p.extend(fBlendPipeline); + p.append(SkRasterPipelineOp::lerp_565, &fMaskPtr); + this->append_clip_lerp(&p); + } + this->append_store(&p); + fBlitMaskLCD16 = p.compile(); + } + if (mask.fFormat == SkMask::k3D_Format && !fBlitMask3D) { + SkRasterPipeline p(fAlloc); + p.extend(fColorPipeline); + // This bit is where we differ from kA8_Format: + p.append(SkRasterPipelineOp::emboss, &fEmbossCtx); + // Now onward just as kA8. + p.append_clamp_if_normalized(fDst.info()); + if (fBlendMode.has_value() && + SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/false)) { + p.append(SkRasterPipelineOp::scale_u8, &fMaskPtr); + this->append_clip_scale(&p); + this->append_load_dst(&p); + p.extend(fBlendPipeline); + } else { + this->append_load_dst(&p); + p.extend(fBlendPipeline); + p.append(SkRasterPipelineOp::lerp_u8, &fMaskPtr); + this->append_clip_lerp(&p); + } + this->append_store(&p); + fBlitMask3D = p.compile(); + } + + std::function* blitter = nullptr; + switch (mask.fFormat) { + case SkMask::kA8_Format: blitter = &fBlitMaskA8; break; + case SkMask::kLCD16_Format: blitter = &fBlitMaskLCD16; break; + case SkMask::k3D_Format: blitter = &fBlitMask3D; break; + default: + SkASSERT(false); + return; + } + + SkASSERT(blitter); + SK_BLITTER_TRACE_STEP(blitMask, + true, + /*scanlines=*/clip.height(), + /*pixels=*/clip.width() * clip.height()); + (*blitter)(clip.left(),clip.top(), clip.width(),clip.height()); +} diff --git a/gfx/skia/skia/src/core/SkRasterPipelineOpContexts.h b/gfx/skia/skia/src/core/SkRasterPipelineOpContexts.h new file mode 100644 index 0000000000..8ebbfdaff9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterPipelineOpContexts.h @@ -0,0 +1,205 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRasterPipelineOpContexts_DEFINED +#define SkRasterPipelineOpContexts_DEFINED + +// The largest number of pixels we handle at a time. We have a separate value for the largest number +// of pixels we handle in the highp pipeline. Many of the context structs in this file are only used +// by stages that have no lowp implementation. They can therefore use the (smaller) highp value to +// save memory in the arena. +inline static constexpr int SkRasterPipeline_kMaxStride = 16; +inline static constexpr int SkRasterPipeline_kMaxStride_highp = 8; + +// These structs hold the context data for many of the Raster Pipeline ops. +struct SkRasterPipeline_MemoryCtx { + void* pixels; + int stride; +}; + +struct SkRasterPipeline_GatherCtx { + const void* pixels; + int stride; + float width; + float height; + float weights[16]; // for bicubic and bicubic_clamp_8888 + // Controls whether pixel i-1 or i is selected when floating point sample position is exactly i. + bool roundDownAtInteger = false; +}; + +// State shared by save_xy, accumulate, and bilinear_* / bicubic_*. +struct SkRasterPipeline_SamplerCtx { + float x[SkRasterPipeline_kMaxStride_highp]; + float y[SkRasterPipeline_kMaxStride_highp]; + float fx[SkRasterPipeline_kMaxStride_highp]; + float fy[SkRasterPipeline_kMaxStride_highp]; + float scalex[SkRasterPipeline_kMaxStride_highp]; + float scaley[SkRasterPipeline_kMaxStride_highp]; + + // for bicubic_[np][13][xy] + float weights[16]; + float wx[4][SkRasterPipeline_kMaxStride_highp]; + float wy[4][SkRasterPipeline_kMaxStride_highp]; +}; + +struct SkRasterPipeline_TileCtx { + float scale; + float invScale; // cache of 1/scale + // When in the reflection portion of mirror tiling we need to snap the opposite direction + // at integer sample points than when in the forward direction. This controls which way we bias + // in the reflection. It should be 1 if SkRasterPipeline_GatherCtx::roundDownAtInteger is true + // and otherwise -1. + int mirrorBiasDir = -1; +}; + +struct SkRasterPipeline_DecalTileCtx { + uint32_t mask[SkRasterPipeline_kMaxStride]; + float limit_x; + float limit_y; + // These control which edge of the interval is included (i.e. closed interval at 0 or at limit). + // They should be set to limit_x and limit_y if SkRasterPipeline_GatherCtx::roundDownAtInteger + // is true and otherwise zero. + float inclusiveEdge_x = 0; + float inclusiveEdge_y = 0; +}; + +// State used by mipmap_linear_* +struct SkRasterPipeline_MipmapCtx { + // Original coords, saved before the base level logic + float x[SkRasterPipeline_kMaxStride_highp]; + float y[SkRasterPipeline_kMaxStride_highp]; + + // Base level color + float r[SkRasterPipeline_kMaxStride_highp]; + float g[SkRasterPipeline_kMaxStride_highp]; + float b[SkRasterPipeline_kMaxStride_highp]; + float a[SkRasterPipeline_kMaxStride_highp]; + + // Scale factors to transform base level coords to lower level coords + float scaleX; + float scaleY; + + float lowerWeight; +}; + +struct SkRasterPipeline_CoordClampCtx { + float min_x, min_y; + float max_x, max_y; +}; + +struct SkRasterPipeline_CallbackCtx { + void (*fn)(SkRasterPipeline_CallbackCtx* self, + int active_pixels /*<= SkRasterPipeline_kMaxStride_highp*/); + + // When called, fn() will have our active pixels available in rgba. + // When fn() returns, the pipeline will read back those active pixels from read_from. + float rgba[4*SkRasterPipeline_kMaxStride_highp]; + float* read_from = rgba; +}; + +// state shared by stack_checkpoint and stack_rewind +struct SkRasterPipelineStage; + +struct SkRasterPipeline_RewindCtx { + float r[SkRasterPipeline_kMaxStride_highp]; + float g[SkRasterPipeline_kMaxStride_highp]; + float b[SkRasterPipeline_kMaxStride_highp]; + float a[SkRasterPipeline_kMaxStride_highp]; + float dr[SkRasterPipeline_kMaxStride_highp]; + float dg[SkRasterPipeline_kMaxStride_highp]; + float db[SkRasterPipeline_kMaxStride_highp]; + float da[SkRasterPipeline_kMaxStride_highp]; + SkRasterPipelineStage* stage; +}; + +struct SkRasterPipeline_GradientCtx { + size_t stopCount; + float* fs[4]; + float* bs[4]; + float* ts; +}; + +struct SkRasterPipeline_EvenlySpaced2StopGradientCtx { + float f[4]; + float b[4]; +}; + +struct SkRasterPipeline_2PtConicalCtx { + uint32_t fMask[SkRasterPipeline_kMaxStride_highp]; + float fP0, + fP1; +}; + +struct SkRasterPipeline_UniformColorCtx { + float r,g,b,a; + uint16_t rgba[4]; // [0,255] in a 16-bit lane. +}; + +struct SkRasterPipeline_EmbossCtx { + SkRasterPipeline_MemoryCtx mul, + add; +}; + +struct SkRasterPipeline_TablesCtx { + const uint8_t *r, *g, *b, *a; +}; + +struct SkRasterPipeline_BinaryOpCtx { + float *dst; + const float *src; +}; + +struct SkRasterPipeline_TernaryOpCtx { + float *dst; + const float *src0; + const float *src1; +}; + +struct SkRasterPipeline_SwizzleCtx { + float *ptr; + uint16_t offsets[4]; // values must be byte offsets (4 * highp-stride * component-index) +}; + +struct SkRasterPipeline_ShuffleCtx { + float *ptr; + int count; + uint16_t offsets[16]; // values must be byte offsets (4 * highp-stride * component-index) +}; + +struct SkRasterPipeline_SwizzleCopyCtx { + float *dst; + float *src; // src values must _not_ overlap dst values + uint16_t offsets[4]; // values must be byte offsets (4 * highp-stride * component-index) +}; + +struct SkRasterPipeline_CopyIndirectCtx { + float *dst; + const float *src; + const uint32_t *indirectOffset; // this applies to `src` or `dst` based on the op + uint32_t indirectLimit; // the indirect offset is clamped to this upper bound + uint32_t slots; // the number of slots to copy +}; + +struct SkRasterPipeline_SwizzleCopyIndirectCtx : public SkRasterPipeline_CopyIndirectCtx { + uint16_t offsets[4]; // values must be byte offsets (4 * highp-stride * component-index) +}; + +struct SkRasterPipeline_BranchCtx { + int offset; // contains the label ID during compilation, and the program offset when compiled +}; + +struct SkRasterPipeline_BranchIfEqualCtx : public SkRasterPipeline_BranchCtx { + int value; + const int *ptr; +}; + +struct SkRasterPipeline_CaseOpCtx { + int expectedValue; + int* ptr; // points to a pair of adjacent I32s: {I32 actualValue, I32 defaultMask} +}; + +#endif // SkRasterPipelineOpContexts_DEFINED diff --git a/gfx/skia/skia/src/core/SkRasterPipelineOpList.h b/gfx/skia/skia/src/core/SkRasterPipelineOpList.h new file mode 100644 index 0000000000..d30da38ea1 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRasterPipelineOpList.h @@ -0,0 +1,195 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRasterPipelineOpList_DEFINED +#define SkRasterPipelineOpList_DEFINED + +// There are two macros here: The first defines ops that have lowp (and highp) implementations. +// The second defines ops that are only present in the highp pipeline. +#define SK_RASTER_PIPELINE_OPS_LOWP(M) \ + M(move_src_dst) M(move_dst_src) M(swap_src_dst) \ + M(clamp_01) M(clamp_gamut) \ + M(premul) M(premul_dst) \ + M(force_opaque) M(force_opaque_dst) \ + M(set_rgb) M(swap_rb) M(swap_rb_dst) \ + M(black_color) M(white_color) \ + M(uniform_color) M(uniform_color_dst) \ + M(seed_shader) \ + M(load_a8) M(load_a8_dst) M(store_a8) M(gather_a8) \ + M(load_565) M(load_565_dst) M(store_565) M(gather_565) \ + M(load_4444) M(load_4444_dst) M(store_4444) M(gather_4444) \ + M(load_8888) M(load_8888_dst) M(store_8888) M(gather_8888) \ + M(load_rg88) M(load_rg88_dst) M(store_rg88) M(gather_rg88) \ + M(store_r8) \ + M(alpha_to_gray) M(alpha_to_gray_dst) \ + M(alpha_to_red) M(alpha_to_red_dst) \ + M(bt709_luminance_or_luma_to_alpha) M(bt709_luminance_or_luma_to_rgb) \ + M(bilerp_clamp_8888) \ + M(load_src) M(store_src) M(store_src_a) M(load_dst) M(store_dst) \ + M(scale_u8) M(scale_565) M(scale_1_float) M(scale_native) \ + M( lerp_u8) M( lerp_565) M( lerp_1_float) M(lerp_native) \ + M(dstatop) M(dstin) M(dstout) M(dstover) \ + M(srcatop) M(srcin) M(srcout) M(srcover) \ + M(clear) M(modulate) M(multiply) M(plus_) M(screen) M(xor_) \ + M(darken) M(difference) \ + M(exclusion) M(hardlight) M(lighten) M(overlay) \ + M(srcover_rgba_8888) \ + M(matrix_translate) M(matrix_scale_translate) \ + M(matrix_2x3) \ + M(matrix_perspective) \ + M(decal_x) M(decal_y) M(decal_x_and_y) \ + M(check_decal_mask) \ + M(clamp_x_1) M(mirror_x_1) M(repeat_x_1) \ + M(clamp_x_and_y) \ + M(evenly_spaced_gradient) \ + M(gradient) \ + M(evenly_spaced_2_stop_gradient) \ + M(xy_to_unit_angle) \ + M(xy_to_radius) \ + M(emboss) \ + M(swizzle) + +#define SK_RASTER_PIPELINE_OPS_HIGHP_ONLY(M) \ + M(callback) \ + M(stack_checkpoint) M(stack_rewind) \ + M(unbounded_set_rgb) M(unbounded_uniform_color) \ + M(unpremul) M(unpremul_polar) M(dither) \ + M(load_16161616) M(load_16161616_dst) M(store_16161616) M(gather_16161616) \ + M(load_a16) M(load_a16_dst) M(store_a16) M(gather_a16) \ + M(load_rg1616) M(load_rg1616_dst) M(store_rg1616) M(gather_rg1616) \ + M(load_f16) M(load_f16_dst) M(store_f16) M(gather_f16) \ + M(load_af16) M(load_af16_dst) M(store_af16) M(gather_af16) \ + M(load_rgf16) M(load_rgf16_dst) M(store_rgf16) M(gather_rgf16) \ + M(load_f32) M(load_f32_dst) M(store_f32) M(gather_f32) \ + M(load_rgf32) M(store_rgf32) \ + M(load_1010102) M(load_1010102_dst) M(store_1010102) M(gather_1010102) \ + M(load_1010102_xr) M(load_1010102_xr_dst) M(store_1010102_xr) \ + M(store_u16_be) \ + M(store_src_rg) M(load_src_rg) \ + M(byte_tables) \ + M(colorburn) M(colordodge) M(softlight) \ + M(hue) M(saturation) M(color) M(luminosity) \ + M(matrix_3x3) M(matrix_3x4) M(matrix_4x5) M(matrix_4x3) \ + M(parametric) M(gamma_) M(PQish) M(HLGish) M(HLGinvish) \ + M(rgb_to_hsl) M(hsl_to_rgb) \ + M(css_lab_to_xyz) M(css_oklab_to_linear_srgb) \ + M(css_hcl_to_lab) \ + M(css_hsl_to_srgb) M(css_hwb_to_srgb) \ + M(gauss_a_to_rgba) \ + M(mirror_x) M(repeat_x) \ + M(mirror_y) M(repeat_y) \ + M(negate_x) \ + M(bicubic_clamp_8888) \ + M(bilinear_setup) \ + M(bilinear_nx) M(bilinear_px) M(bilinear_ny) M(bilinear_py) \ + M(bicubic_setup) \ + M(bicubic_n3x) M(bicubic_n1x) M(bicubic_p1x) M(bicubic_p3x) \ + M(bicubic_n3y) M(bicubic_n1y) M(bicubic_p1y) M(bicubic_p3y) \ + M(accumulate) \ + M(mipmap_linear_init) M(mipmap_linear_update) M(mipmap_linear_finish) \ + M(xy_to_2pt_conical_strip) \ + M(xy_to_2pt_conical_focal_on_circle) \ + M(xy_to_2pt_conical_well_behaved) \ + M(xy_to_2pt_conical_smaller) \ + M(xy_to_2pt_conical_greater) \ + M(alter_2pt_conical_compensate_focal) \ + M(alter_2pt_conical_unswap) \ + M(mask_2pt_conical_nan) \ + M(mask_2pt_conical_degenerates) M(apply_vector_mask) \ + /* Dedicated SkSL stages begin here: */ \ + M(init_lane_masks) M(store_device_xy01) \ + M(load_condition_mask) M(store_condition_mask) M(merge_condition_mask) \ + M(load_loop_mask) M(store_loop_mask) M(mask_off_loop_mask) \ + M(reenable_loop_mask) M(merge_loop_mask) M(case_op) \ + M(load_return_mask) M(store_return_mask) M(mask_off_return_mask) \ + M(branch_if_all_lanes_active) M(branch_if_any_lanes_active) M(branch_if_no_lanes_active) \ + M(branch_if_no_active_lanes_eq) M(jump) \ + M(bitwise_and_n_ints) \ + M(bitwise_and_int) M(bitwise_and_2_ints) M(bitwise_and_3_ints) M(bitwise_and_4_ints) \ + M(bitwise_or_n_ints) \ + M(bitwise_or_int) M(bitwise_or_2_ints) M(bitwise_or_3_ints) M(bitwise_or_4_ints) \ + M(bitwise_xor_n_ints) \ + M(bitwise_xor_int) M(bitwise_xor_2_ints) M(bitwise_xor_3_ints) M(bitwise_xor_4_ints) \ + M(bitwise_not_int) M(bitwise_not_2_ints) M(bitwise_not_3_ints) M(bitwise_not_4_ints) \ + M(cast_to_float_from_int) M(cast_to_float_from_2_ints) \ + M(cast_to_float_from_3_ints) M(cast_to_float_from_4_ints) \ + M(cast_to_float_from_uint) M(cast_to_float_from_2_uints) \ + M(cast_to_float_from_3_uints) M(cast_to_float_from_4_uints) \ + M(cast_to_int_from_float) M(cast_to_int_from_2_floats) \ + M(cast_to_int_from_3_floats) M(cast_to_int_from_4_floats) \ + M(cast_to_uint_from_float) M(cast_to_uint_from_2_floats) \ + M(cast_to_uint_from_3_floats) M(cast_to_uint_from_4_floats) \ + M(abs_float) M(abs_2_floats) M(abs_3_floats) M(abs_4_floats) \ + M(abs_int) M(abs_2_ints) M(abs_3_ints) M(abs_4_ints) \ + M(floor_float) M(floor_2_floats) M(floor_3_floats) M(floor_4_floats) \ + M(ceil_float) M(ceil_2_floats) M(ceil_3_floats) M(ceil_4_floats) \ + M(invsqrt_float) M(invsqrt_2_floats) M(invsqrt_3_floats) M(invsqrt_4_floats) \ + M(inverse_mat2) M(inverse_mat3) M(inverse_mat4) \ + M(sin_float) M(cos_float) M(tan_float) \ + M(asin_float) M(acos_float) M(atan_float) M(atan2_n_floats) \ + M(sqrt_float) M(pow_n_floats) M(exp_float) M(exp2_float) \ + M(log_float) M(log2_float) M(refract_4_floats) \ + M(copy_constant) M(copy_2_constants) M(copy_3_constants) M(copy_4_constants) \ + M(copy_slot_masked) M(copy_2_slots_masked) M(copy_3_slots_masked) M(copy_4_slots_masked) \ + M(copy_from_indirect_unmasked) M(copy_from_indirect_uniform_unmasked) \ + M(copy_to_indirect_masked) M(swizzle_copy_to_indirect_masked) \ + M(copy_slot_unmasked) M(copy_2_slots_unmasked) \ + M(copy_3_slots_unmasked) M(copy_4_slots_unmasked) \ + M(zero_slot_unmasked) M(zero_2_slots_unmasked) \ + M(zero_3_slots_unmasked) M(zero_4_slots_unmasked) \ + M(swizzle_copy_slot_masked) M(swizzle_copy_2_slots_masked) \ + M(swizzle_copy_3_slots_masked) M(swizzle_copy_4_slots_masked) \ + M(swizzle_1) M(swizzle_2) M(swizzle_3) M(swizzle_4) M(shuffle) \ + M(add_n_floats) M(add_float) M(add_2_floats) M(add_3_floats) M(add_4_floats) \ + M(add_n_ints) M(add_int) M(add_2_ints) M(add_3_ints) M(add_4_ints) \ + M(sub_n_floats) M(sub_float) M(sub_2_floats) M(sub_3_floats) M(sub_4_floats) \ + M(sub_n_ints) M(sub_int) M(sub_2_ints) M(sub_3_ints) M(sub_4_ints) \ + M(mul_n_floats) M(mul_float) M(mul_2_floats) M(mul_3_floats) M(mul_4_floats) \ + M(mul_n_ints) M(mul_int) M(mul_2_ints) M(mul_3_ints) M(mul_4_ints) \ + M(div_n_floats) M(div_float) M(div_2_floats) M(div_3_floats) M(div_4_floats) \ + M(div_n_ints) M(div_int) M(div_2_ints) M(div_3_ints) M(div_4_ints) \ + M(div_n_uints) M(div_uint) M(div_2_uints) M(div_3_uints) M(div_4_uints) \ + M(max_n_floats) M(max_float) M(max_2_floats) M(max_3_floats) M(max_4_floats) \ + M(max_n_ints) M(max_int) M(max_2_ints) M(max_3_ints) M(max_4_ints) \ + M(max_n_uints) M(max_uint) M(max_2_uints) M(max_3_uints) M(max_4_uints) \ + M(min_n_floats) M(min_float) M(min_2_floats) M(min_3_floats) M(min_4_floats) \ + M(min_n_ints) M(min_int) M(min_2_ints) M(min_3_ints) M(min_4_ints) \ + M(min_n_uints) M(min_uint) M(min_2_uints) M(min_3_uints) M(min_4_uints) \ + M(mod_n_floats) M(mod_float) M(mod_2_floats) M(mod_3_floats) M(mod_4_floats) \ + M(mix_n_floats) M(mix_float) M(mix_2_floats) M(mix_3_floats) M(mix_4_floats) \ + M(mix_n_ints) M(mix_int) M(mix_2_ints) M(mix_3_ints) M(mix_4_ints) \ + M(smoothstep_n_floats) M(dot_2_floats) M(dot_3_floats) M(dot_4_floats) \ + M(cmplt_n_floats) M(cmplt_float) M(cmplt_2_floats) M(cmplt_3_floats) M(cmplt_4_floats) \ + M(cmplt_n_ints) M(cmplt_int) M(cmplt_2_ints) M(cmplt_3_ints) M(cmplt_4_ints) \ + M(cmplt_n_uints) M(cmplt_uint) M(cmplt_2_uints) M(cmplt_3_uints) M(cmplt_4_uints) \ + M(cmple_n_floats) M(cmple_float) M(cmple_2_floats) M(cmple_3_floats) M(cmple_4_floats) \ + M(cmple_n_ints) M(cmple_int) M(cmple_2_ints) M(cmple_3_ints) M(cmple_4_ints) \ + M(cmple_n_uints) M(cmple_uint) M(cmple_2_uints) M(cmple_3_uints) M(cmple_4_uints) \ + M(cmpeq_n_floats) M(cmpeq_float) M(cmpeq_2_floats) M(cmpeq_3_floats) M(cmpeq_4_floats) \ + M(cmpeq_n_ints) M(cmpeq_int) M(cmpeq_2_ints) M(cmpeq_3_ints) M(cmpeq_4_ints) \ + M(cmpne_n_floats) M(cmpne_float) M(cmpne_2_floats) M(cmpne_3_floats) M(cmpne_4_floats) \ + M(cmpne_n_ints) M(cmpne_int) M(cmpne_2_ints) M(cmpne_3_ints) M(cmpne_4_ints) + +// The combined list of all RasterPipeline ops: +#define SK_RASTER_PIPELINE_OPS_ALL(M) \ + SK_RASTER_PIPELINE_OPS_LOWP(M) \ + SK_RASTER_PIPELINE_OPS_HIGHP_ONLY(M) + +// An enumeration of every RasterPipeline op: +enum class SkRasterPipelineOp { +#define M(op) op, + SK_RASTER_PIPELINE_OPS_ALL(M) +#undef M +}; + +// A count of raster pipeline ops: +#define M(st) +1 + static constexpr int kNumRasterPipelineLowpOps = SK_RASTER_PIPELINE_OPS_LOWP(M); + static constexpr int kNumRasterPipelineHighpOps = SK_RASTER_PIPELINE_OPS_ALL(M); +#undef M + +#endif // SkRasterPipelineOpList_DEFINED diff --git a/gfx/skia/skia/src/core/SkReadBuffer.cpp b/gfx/skia/skia/src/core/SkReadBuffer.cpp new file mode 100644 index 0000000000..22655a6e4e --- /dev/null +++ b/gfx/skia/skia/src/core/SkReadBuffer.cpp @@ -0,0 +1,504 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkReadBuffer.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageGenerator.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRegion.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkMalloc.h" +#include "src/base/SkAutoMalloc.h" +#include "src/base/SkMathPriv.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkMipmapBuilder.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include + +namespace { + // This generator intentionally should always fail on all attempts to get its pixels, + // simulating a bad or empty codec stream. + class EmptyImageGenerator final : public SkImageGenerator { + public: + EmptyImageGenerator(const SkImageInfo& info) : SkImageGenerator(info) { } + + }; + + static sk_sp MakeEmptyImage(int width, int height) { + return SkImage::MakeFromGenerator( + std::make_unique(SkImageInfo::MakeN32Premul(width, height))); + } + +} // anonymous namespace + +void SkReadBuffer::setMemory(const void* data, size_t size) { + this->validate(IsPtrAlign4(data) && (SkAlign4(size) == size)); + if (!fError) { + fBase = fCurr = (const char*)data; + fStop = fBase + size; + } +} + +void SkReadBuffer::setInvalid() { + if (!fError) { + // When an error is found, send the read cursor to the end of the stream + fCurr = fStop; + fError = true; + } +} + +const void* SkReadBuffer::skip(size_t size) { + size_t inc = SkAlign4(size); + this->validate(inc >= size); + const void* addr = fCurr; + this->validate(IsPtrAlign4(addr) && this->isAvailable(inc)); + if (fError) { + return nullptr; + } + + fCurr += inc; + return addr; +} + +const void* SkReadBuffer::skip(size_t count, size_t size) { + return this->skip(SkSafeMath::Mul(count, size)); +} + +void SkReadBuffer::setDeserialProcs(const SkDeserialProcs& procs) { + fProcs = procs; +} + +bool SkReadBuffer::readBool() { + uint32_t value = this->readUInt(); + // Boolean value should be either 0 or 1 + this->validate(!(value & ~1)); + return value != 0; +} + +SkColor SkReadBuffer::readColor() { + return this->readUInt(); +} + +int32_t SkReadBuffer::readInt() { + const size_t inc = sizeof(int32_t); + if (!this->validate(IsPtrAlign4(fCurr) && this->isAvailable(inc))) { + return 0; + } + int32_t value = *((const int32_t*)fCurr); + fCurr += inc; + return value; +} + +SkScalar SkReadBuffer::readScalar() { + const size_t inc = sizeof(SkScalar); + if (!this->validate(IsPtrAlign4(fCurr) && this->isAvailable(inc))) { + return 0; + } + SkScalar value = *((const SkScalar*)fCurr); + fCurr += inc; + return value; +} + +uint32_t SkReadBuffer::readUInt() { + return this->readInt(); +} + +int32_t SkReadBuffer::read32() { + return this->readInt(); +} + +uint8_t SkReadBuffer::peekByte() { + if (this->available() <= 0) { + fError = true; + return 0; + } + return *((uint8_t*)fCurr); +} + +bool SkReadBuffer::readPad32(void* buffer, size_t bytes) { + if (const void* src = this->skip(bytes)) { + // buffer might be null if bytes is zero (see SkAutoMalloc), hence we call + // the careful version of memcpy. + sk_careful_memcpy(buffer, src, bytes); + return true; + } + return false; +} + +const char* SkReadBuffer::readString(size_t* len) { + *len = this->readUInt(); + + // The string is len characters and a terminating \0. + const char* c_str = this->skipT(*len+1); + + if (this->validate(c_str && c_str[*len] == '\0')) { + return c_str; + } + return nullptr; +} + +void SkReadBuffer::readString(SkString* string) { + size_t len; + if (const char* c_str = this->readString(&len)) { + string->set(c_str, len); + return; + } + string->reset(); +} + +void SkReadBuffer::readColor4f(SkColor4f* color) { + if (!this->readPad32(color, sizeof(SkColor4f))) { + *color = {0, 0, 0, 0}; + } +} + +void SkReadBuffer::readPoint(SkPoint* point) { + point->fX = this->readScalar(); + point->fY = this->readScalar(); +} + +void SkReadBuffer::readPoint3(SkPoint3* point) { + this->readPad32(point, sizeof(SkPoint3)); +} + +void SkReadBuffer::read(SkM44* matrix) { + if (this->isValid()) { + if (const float* m = (const float*)this->skip(sizeof(float) * 16)) { + *matrix = SkM44::ColMajor(m); + } + } + if (!this->isValid()) { + *matrix = SkM44(); + } +} + +void SkReadBuffer::readMatrix(SkMatrix* matrix) { + size_t size = 0; + if (this->isValid()) { + size = SkMatrixPriv::ReadFromMemory(matrix, fCurr, this->available()); + (void)this->validate((SkAlign4(size) == size) && (0 != size)); + } + if (!this->isValid()) { + matrix->reset(); + } + (void)this->skip(size); +} + +void SkReadBuffer::readIRect(SkIRect* rect) { + if (!this->readPad32(rect, sizeof(SkIRect))) { + rect->setEmpty(); + } +} + +void SkReadBuffer::readRect(SkRect* rect) { + if (!this->readPad32(rect, sizeof(SkRect))) { + rect->setEmpty(); + } +} + +SkRect SkReadBuffer::readRect() { + SkRect r; + if (!this->readPad32(&r, sizeof(SkRect))) { + r.setEmpty(); + } + return r; +} + +SkSamplingOptions SkReadBuffer::readSampling() { + if (!this->isVersionLT(SkPicturePriv::kAnisotropicFilter)) { + int maxAniso = this->readInt(); + if (maxAniso != 0) { + return SkSamplingOptions::Aniso(maxAniso); + } + } + if (this->readBool()) { + float B = this->readScalar(); + float C = this->readScalar(); + return SkSamplingOptions({B, C}); + } else { + SkFilterMode filter = this->read32LE(SkFilterMode::kLinear); + SkMipmapMode mipmap = this->read32LE(SkMipmapMode::kLinear); + return SkSamplingOptions(filter, mipmap); + } +} + +void SkReadBuffer::readRRect(SkRRect* rrect) { + size_t size = 0; + if (!fError) { + size = rrect->readFromMemory(fCurr, this->available()); + if (!this->validate((SkAlign4(size) == size) && (0 != size))) { + rrect->setEmpty(); + } + } + (void)this->skip(size); +} + +void SkReadBuffer::readRegion(SkRegion* region) { + size_t size = 0; + if (!fError) { + size = region->readFromMemory(fCurr, this->available()); + if (!this->validate((SkAlign4(size) == size) && (0 != size))) { + region->setEmpty(); + } + } + (void)this->skip(size); +} + +void SkReadBuffer::readPath(SkPath* path) { + size_t size = 0; + if (!fError) { + size = path->readFromMemory(fCurr, this->available()); + if (!this->validate((SkAlign4(size) == size) && (0 != size))) { + path->reset(); + } + } + (void)this->skip(size); +} + +bool SkReadBuffer::readArray(void* value, size_t size, size_t elementSize) { + const uint32_t count = this->readUInt(); + return this->validate(size == count) && + this->readPad32(value, SkSafeMath::Mul(size, elementSize)); +} + +bool SkReadBuffer::readByteArray(void* value, size_t size) { + return this->readArray(value, size, sizeof(uint8_t)); +} + +bool SkReadBuffer::readColorArray(SkColor* colors, size_t size) { + return this->readArray(colors, size, sizeof(SkColor)); +} + +bool SkReadBuffer::readColor4fArray(SkColor4f* colors, size_t size) { + return this->readArray(colors, size, sizeof(SkColor4f)); +} + +bool SkReadBuffer::readIntArray(int32_t* values, size_t size) { + return this->readArray(values, size, sizeof(int32_t)); +} + +bool SkReadBuffer::readPointArray(SkPoint* points, size_t size) { + return this->readArray(points, size, sizeof(SkPoint)); +} + +bool SkReadBuffer::readScalarArray(SkScalar* values, size_t size) { + return this->readArray(values, size, sizeof(SkScalar)); +} + +const void* SkReadBuffer::skipByteArray(size_t* size) { + const uint32_t count = this->readUInt(); + const void* buf = this->skip(count); + if (size) { + *size = this->isValid() ? count : 0; + } + return buf; +} + +sk_sp SkReadBuffer::readByteArrayAsData() { + size_t numBytes = this->getArrayCount(); + if (!this->validate(this->isAvailable(numBytes))) { + return nullptr; + } + + SkAutoMalloc buffer(numBytes); + if (!this->readByteArray(buffer.get(), numBytes)) { + return nullptr; + } + return SkData::MakeFromMalloc(buffer.release(), numBytes); +} + +uint32_t SkReadBuffer::getArrayCount() { + const size_t inc = sizeof(uint32_t); + if (!this->validate(IsPtrAlign4(fCurr) && this->isAvailable(inc))) { + return 0; + } + return *((uint32_t*)fCurr); +} + +// If we see a corrupt stream, we return null (fail). If we just fail trying to decode +// the image, we don't fail, but return a 1x1 empty image. +sk_sp SkReadBuffer::readImage() { + uint32_t flags = this->read32(); + + sk_sp image; + { + sk_sp data = this->readByteArrayAsData(); + if (!data) { + this->validate(false); + return nullptr; + } + if (fProcs.fImageProc) { + image = fProcs.fImageProc(data->data(), data->size(), fProcs.fImageCtx); + } + if (!image) { + std::optional alphaType = std::nullopt; + if (flags & SkWriteBufferImageFlags::kUnpremul) { + alphaType = kUnpremul_SkAlphaType; + } + image = SkImage::MakeFromEncoded(std::move(data), alphaType); + } + } + + if (flags & SkWriteBufferImageFlags::kHasSubsetRect) { + SkIRect subset; + this->readIRect(&subset); + if (image) { + image = image->makeSubset(subset); + } + } + + if (flags & SkWriteBufferImageFlags::kHasMipmap) { + sk_sp data = this->readByteArrayAsData(); + if (!data) { + this->validate(false); + return nullptr; + } + if (image) { + SkMipmapBuilder builder(image->imageInfo()); + if (SkMipmap::Deserialize(&builder, data->data(), data->size())) { + // TODO: need to make lazy images support mips + if (auto ri = image->makeRasterImage()) { + image = ri; + } + image = builder.attachTo(image); + SkASSERT(image); // withMipmaps should never return null + } + } + } + return image ? image : MakeEmptyImage(1, 1); +} + +sk_sp SkReadBuffer::readTypeface() { + // Read 32 bits (signed) + // 0 -- return null (default font) + // >0 -- index + // <0 -- custom (serial procs) : negative size in bytes + + int32_t index = this->read32(); + if (index == 0) { + return nullptr; + } else if (index > 0) { + if (!this->validate(index <= fTFCount)) { + return nullptr; + } + return fTFArray[index - 1]; + } else { // custom + size_t size = sk_negate_to_size_t(index); + const void* data = this->skip(size); + if (!this->validate(data != nullptr && fProcs.fTypefaceProc)) { + return nullptr; + } + return fProcs.fTypefaceProc(data, size, fProcs.fTypefaceCtx); + } +} + +SkFlattenable* SkReadBuffer::readRawFlattenable() { + SkFlattenable::Factory factory = nullptr; + + if (fFactoryCount > 0) { + int32_t index = this->read32(); + if (0 == index || !this->isValid()) { + return nullptr; // writer failed to give us the flattenable + } + if (index < 0) { + this->validate(false); + return nullptr; + } + index -= 1; // we stored the index-base-1 + if ((unsigned)index >= (unsigned)fFactoryCount) { + this->validate(false); + return nullptr; + } + factory = fFactoryArray[index]; + } else { + if (this->peekByte() != 0) { + // If the first byte is non-zero, the flattenable is specified by a string. + size_t ignored_length; + if (const char* name = this->readString(&ignored_length)) { + factory = SkFlattenable::NameToFactory(name); + fFlattenableDict.set(fFlattenableDict.count() + 1, factory); + } + } else { + // Read the index. We are guaranteed that the first byte + // is zeroed, so we must shift down a byte. + uint32_t index = this->readUInt() >> 8; + if (index == 0) { + return nullptr; // writer failed to give us the flattenable + } + + if (SkFlattenable::Factory* found = fFlattenableDict.find(index)) { + factory = *found; + } + } + + if (!this->validate(factory != nullptr)) { + return nullptr; + } + } + + // if we get here, factory may still be null, but if that is the case, the + // failure was ours, not the writer. + sk_sp obj; + uint32_t sizeRecorded = this->read32(); + if (factory) { + size_t offset = this->offset(); + obj = (*factory)(*this); + // check that we read the amount we expected + size_t sizeRead = this->offset() - offset; + if (sizeRecorded != sizeRead) { + this->validate(false); + return nullptr; + } + } else { + // we must skip the remaining data + this->skip(sizeRecorded); + } + if (!this->isValid()) { + return nullptr; + } + return obj.release(); +} + +SkFlattenable* SkReadBuffer::readFlattenable(SkFlattenable::Type ft) { + SkFlattenable* obj = this->readRawFlattenable(); + if (obj && obj->getFlattenableType() != ft) { + this->validate(false); + obj->unref(); + return nullptr; + } + return obj; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +int32_t SkReadBuffer::checkInt(int32_t min, int32_t max) { + SkASSERT(min <= max); + int32_t value = this->read32(); + if (value < min || value > max) { + this->validate(false); + value = min; + } + return value; +} + +SkLegacyFQ SkReadBuffer::checkFilterQuality() { + return this->checkRange(kNone_SkLegacyFQ, kLast_SkLegacyFQ); +} diff --git a/gfx/skia/skia/src/core/SkReadBuffer.h b/gfx/skia/skia/src/core/SkReadBuffer.h new file mode 100644 index 0000000000..45f4343eb4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkReadBuffer.h @@ -0,0 +1,264 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkReadBuffer_DEFINED +#define SkReadBuffer_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSerialProcs.h" +#include "include/core/SkShader.h" +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkAssert.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkSamplingPriv.h" +#include "src/core/SkTHash.h" +#include "src/shaders/SkShaderBase.h" + +#include +#include + +class SkBlender; +class SkData; +class SkImage; +class SkM44; +class SkMaskFilter; +class SkMatrix; +class SkPath; +class SkRRect; +class SkRegion; +class SkString; +class SkTypeface; +struct SkPoint3; + +#ifdef SK_SUPPORT_LEGACY_DRAWLOOPER +#include "include/core/SkDrawLooper.h" +#endif + +class SkReadBuffer { +public: + SkReadBuffer() = default; + SkReadBuffer(const void* data, size_t size) { + this->setMemory(data, size); + } + + void setMemory(const void*, size_t); + + /** + * Returns true IFF the version is older than the specified version. + */ + bool isVersionLT(SkPicturePriv::Version targetVersion) const { + SkASSERT(targetVersion > 0); + return fVersion > 0 && fVersion < targetVersion; + } + + uint32_t getVersion() const { return fVersion; } + + /** This may be called at most once; most clients of SkReadBuffer should not mess with it. */ + void setVersion(int version) { + SkASSERT(0 == fVersion || version == fVersion); + fVersion = version; + } + + size_t size() const { return fStop - fBase; } + size_t offset() const { return fCurr - fBase; } + bool eof() { return fCurr >= fStop; } + const void* skip(size_t size); + const void* skip(size_t count, size_t size); // does safe multiply + size_t available() const { return fStop - fCurr; } + + template const T* skipT() { + return static_cast(this->skip(sizeof(T))); + } + template const T* skipT(size_t count) { + return static_cast(this->skip(count, sizeof(T))); + } + + // primitives + bool readBool(); + SkColor readColor(); + int32_t readInt(); + SkScalar readScalar(); + uint32_t readUInt(); + int32_t read32(); + + template T read32LE(T max) { + uint32_t value = this->readUInt(); + if (!this->validate(value <= static_cast(max))) { + value = 0; + } + return static_cast(value); + } + + // peek + uint8_t peekByte(); + + void readString(SkString* string); + + // common data structures + void readColor4f(SkColor4f* color); + void readPoint(SkPoint* point); + SkPoint readPoint() { SkPoint p; this->readPoint(&p); return p; } + void readPoint3(SkPoint3* point); + void read(SkM44*); + void readMatrix(SkMatrix* matrix); + void readIRect(SkIRect* rect); + void readRect(SkRect* rect); + SkRect readRect(); + void readRRect(SkRRect* rrect); + void readRegion(SkRegion* region); + + void readPath(SkPath* path); + + SkPaint readPaint() { + return SkPaintPriv::Unflatten(*this); + } + + SkFlattenable* readRawFlattenable(); + SkFlattenable* readFlattenable(SkFlattenable::Type); + template sk_sp readFlattenable() { + return sk_sp((T*)this->readFlattenable(T::GetFlattenableType())); + } + sk_sp readColorFilter() { return this->readFlattenable(); } +#ifdef SK_SUPPORT_LEGACY_DRAWLOOPER + sk_sp readDrawLooper() { return this->readFlattenable(); } +#endif + sk_sp readImageFilter() { return this->readFlattenable(); } + sk_sp readBlender() { return this->readFlattenable(); } + sk_sp readMaskFilter() { return this->readFlattenable(); } + sk_sp readPathEffect() { return this->readFlattenable(); } + sk_sp readShader() { return this->readFlattenable(); } + + // Reads SkAlign4(bytes), but will only copy bytes into the buffer. + bool readPad32(void* buffer, size_t bytes); + + // binary data and arrays + bool readByteArray(void* value, size_t size); + bool readColorArray(SkColor* colors, size_t size); + bool readColor4fArray(SkColor4f* colors, size_t size); + bool readIntArray(int32_t* values, size_t size); + bool readPointArray(SkPoint* points, size_t size); + bool readScalarArray(SkScalar* values, size_t size); + + const void* skipByteArray(size_t* size); + + sk_sp readByteArrayAsData(); + + // helpers to get info about arrays and binary data + uint32_t getArrayCount(); + + // If there is a real error (e.g. data is corrupted) this returns null. If the image cannot + // be created (e.g. it was not originally encoded) then this returns an image that doesn't + // draw. + sk_sp readImage(); + sk_sp readTypeface(); + + void setTypefaceArray(sk_sp array[], int count) { + fTFArray = array; + fTFCount = count; + } + + /** + * Call this with a pre-loaded array of Factories, in the same order as + * were created/written by the writer. SkPicture uses this. + */ + void setFactoryPlayback(SkFlattenable::Factory array[], int count) { + fFactoryArray = array; + fFactoryCount = count; + } + + void setDeserialProcs(const SkDeserialProcs& procs); + const SkDeserialProcs& getDeserialProcs() const { return fProcs; } + + /** + * If isValid is false, sets the buffer to be "invalid". Returns true if the buffer + * is still valid. + */ + bool validate(bool isValid) { + if (!isValid) { + this->setInvalid(); + } + return !fError; + } + + /** + * Helper function to do a preflight check before a large allocation or read. + * Returns true if there is enough bytes in the buffer to read n elements of T. + * If not, the buffer will be "invalid" and false will be returned. + */ + template + bool validateCanReadN(size_t n) { + return this->validate(n <= (this->available() / sizeof(T))); + } + + bool isValid() const { return !fError; } + bool validateIndex(int index, int count) { + return this->validate(index >= 0 && index < count); + } + + // Utilities that mark the buffer invalid if the requested value is out-of-range + + // If the read value is outside of the range, validate(false) is called, and min + // is returned, else the value is returned. + int32_t checkInt(int min, int max); + + template T checkRange(T min, T max) { + return static_cast(this->checkInt(static_cast(min), + static_cast(max))); + } + + SkLegacyFQ checkFilterQuality(); + + SkSamplingOptions readSampling(); + +private: + const char* readString(size_t* length); + + void setInvalid(); + bool readArray(void* value, size_t size, size_t elementSize); + bool isAvailable(size_t size) const { return size <= this->available(); } + + // These are always 4-byte aligned + const char* fCurr = nullptr; // current position within buffer + const char* fStop = nullptr; // end of buffer + const char* fBase = nullptr; // beginning of buffer + + // Only used if we do not have an fFactoryArray. + SkTHashMap fFlattenableDict; + + int fVersion = 0; + + sk_sp* fTFArray = nullptr; + int fTFCount = 0; + + SkFlattenable::Factory* fFactoryArray = nullptr; + int fFactoryCount = 0; + + SkDeserialProcs fProcs; + + static bool IsPtrAlign4(const void* ptr) { + return SkIsAlign4((uintptr_t)ptr); + } + + bool fError = false; +}; + +#endif // SkReadBuffer_DEFINED diff --git a/gfx/skia/skia/src/core/SkReadPixelsRec.cpp b/gfx/skia/skia/src/core/SkReadPixelsRec.cpp new file mode 100644 index 0000000000..505bfb51b3 --- /dev/null +++ b/gfx/skia/skia/src/core/SkReadPixelsRec.cpp @@ -0,0 +1,42 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/core/SkReadPixelsRec.h" + +#include "include/core/SkRect.h" + +bool SkReadPixelsRec::trim(int srcWidth, int srcHeight) { + if (nullptr == fPixels || fRowBytes < fInfo.minRowBytes()) { + return false; + } + if (0 >= fInfo.width() || 0 >= fInfo.height()) { + return false; + } + + int x = fX; + int y = fY; + SkIRect srcR = SkIRect::MakeXYWH(x, y, fInfo.width(), fInfo.height()); + if (!srcR.intersect({0, 0, srcWidth, srcHeight})) { + return false; + } + + // if x or y are negative, then we have to adjust pixels + if (x > 0) { + x = 0; + } + if (y > 0) { + y = 0; + } + // here x,y are either 0 or negative + // we negate and add them so UBSAN (pointer-overflow) doesn't get confused. + fPixels = ((char*)fPixels + -y*fRowBytes + -x*fInfo.bytesPerPixel()); + // the intersect may have shrunk info's logical size + fInfo = fInfo.makeDimensions(srcR.size()); + fX = srcR.x(); + fY = srcR.y(); + + return true; +} diff --git a/gfx/skia/skia/src/core/SkReadPixelsRec.h b/gfx/skia/skia/src/core/SkReadPixelsRec.h new file mode 100644 index 0000000000..959b51b3b5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkReadPixelsRec.h @@ -0,0 +1,52 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkReadPixelsRec_DEFINED +#define SkReadPixelsRec_DEFINED + +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" + +#include + +/** + * Helper class to package and trim the parameters passed to readPixels() + */ +struct SkReadPixelsRec { + SkReadPixelsRec(const SkImageInfo& info, void* pixels, size_t rowBytes, int x, int y) + : fPixels(pixels) + , fRowBytes(rowBytes) + , fInfo(info) + , fX(x) + , fY(y) + {} + + SkReadPixelsRec(const SkPixmap& pm, int x, int y) + : fPixels(pm.writable_addr()) + , fRowBytes(pm.rowBytes()) + , fInfo(pm.info()) + , fX(x) + , fY(y) + {} + + void* fPixels; + size_t fRowBytes; + SkImageInfo fInfo; + int fX; + int fY; + + /* + * On true, may have modified its fields (except fRowBytes) to make it a legal subset + * of the specified src width/height. + * + * On false, leaves self unchanged, but indicates that it does not overlap src, or + * is not valid (e.g. bad fInfo) for readPixels(). + */ + bool trim(int srcWidth, int srcHeight); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkRecord.cpp b/gfx/skia/skia/src/core/SkRecord.cpp new file mode 100644 index 0000000000..6f93944b36 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecord.cpp @@ -0,0 +1,37 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImage.h" +#include "src/core/SkRecord.h" +#include + +SkRecord::~SkRecord() { + Destroyer destroyer; + for (int i = 0; i < this->count(); i++) { + this->mutate(i, destroyer); + } +} + +void SkRecord::grow() { + SkASSERT(fCount == fReserved); + fReserved = fReserved ? fReserved * 2 : 4; + fRecords.realloc(fReserved); +} + +size_t SkRecord::bytesUsed() const { + size_t bytes = fApproxBytesAllocated + sizeof(SkRecord); + return bytes; +} + +void SkRecord::defrag() { + // Remove all the NoOps, preserving the order of other ops, e.g. + // Save, ClipRect, NoOp, DrawRect, NoOp, NoOp, Restore + // -> Save, ClipRect, DrawRect, Restore + Record* noops = std::remove_if(fRecords.get(), fRecords.get() + fCount, + [](Record op) { return op.type() == SkRecords::NoOp_Type; }); + fCount = noops - fRecords.get(); +} diff --git a/gfx/skia/skia/src/core/SkRecord.h b/gfx/skia/skia/src/core/SkRecord.h new file mode 100644 index 0000000000..d8c5efe54e --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecord.h @@ -0,0 +1,181 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRecord_DEFINED +#define SkRecord_DEFINED + +#include "include/private/base/SkTLogic.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkRecords.h" + +// SkRecord represents a sequence of SkCanvas calls, saved for future use. +// These future uses may include: replay, optimization, serialization, or combinations of those. +// +// Though an enterprising user may find calling alloc(), append(), visit(), and mutate() enough to +// work with SkRecord, you probably want to look at SkRecorder which presents an SkCanvas interface +// for creating an SkRecord, and SkRecordDraw which plays an SkRecord back into another SkCanvas. +// +// SkRecord often looks like it's compatible with any type T, but really it's compatible with any +// type T which has a static const SkRecords::Type kType. That is to say, SkRecord is compatible +// only with SkRecords::* structs defined in SkRecords.h. Your compiler will helpfully yell if you +// get this wrong. + +class SkRecord : public SkRefCnt { +public: + SkRecord() = default; + ~SkRecord() override; + + // Returns the number of canvas commands in this SkRecord. + int count() const { return fCount; } + + // Visit the i-th canvas command with a functor matching this interface: + // template + // R operator()(const T& record) { ... } + // This operator() must be defined for at least all SkRecords::*. + template + auto visit(int i, F&& f) const -> decltype(f(SkRecords::NoOp())) { + return fRecords[i].visit(f); + } + + // Mutate the i-th canvas command with a functor matching this interface: + // template + // R operator()(T* record) { ... } + // This operator() must be defined for at least all SkRecords::*. + template + auto mutate(int i, F&& f) -> decltype(f((SkRecords::NoOp*)nullptr)) { + return fRecords[i].mutate(f); + } + + // Allocate contiguous space for count Ts, to be freed when the SkRecord is destroyed. + // Here T can be any class, not just those from SkRecords. Throws on failure. + template + T* alloc(size_t count = 1) { + struct RawBytes { + alignas(T) char data[sizeof(T)]; + }; + fApproxBytesAllocated += count * sizeof(T) + alignof(T); + return (T*)fAlloc.makeArrayDefault(count); + } + + // Add a new command of type T to the end of this SkRecord. + // You are expected to placement new an object of type T onto this pointer. + template + T* append() { + if (fCount == fReserved) { + this->grow(); + } + return fRecords[fCount++].set(this->allocCommand()); + } + + // Replace the i-th command with a new command of type T. + // You are expected to placement new an object of type T onto this pointer. + // References to the original command are invalidated. + template + T* replace(int i) { + SkASSERT(i < this->count()); + + Destroyer destroyer; + this->mutate(i, destroyer); + + return fRecords[i].set(this->allocCommand()); + } + + // Does not return the bytes in any pointers embedded in the Records; callers + // need to iterate with a visitor to measure those they care for. + size_t bytesUsed() const; + + // Rearrange and resize this record to eliminate any NoOps. + // May change count() and the indices of ops, but preserves their order. + void defrag(); + +private: + // An SkRecord is structured as an array of pointers into a big chunk of memory where + // records representing each canvas draw call are stored: + // + // fRecords: [*][*][*]... + // | | | + // | | | + // | | +---------------------------------------+ + // | +-----------------+ | + // | | | + // v v v + // fAlloc: [SkRecords::DrawRect][SkRecords::DrawPosTextH][SkRecords::DrawRect]... + // + // We store the types of each of the pointers alongside the pointer. + // The cost to append a T to this structure is 8 + sizeof(T) bytes. + + // A mutator that can be used with replace to destroy canvas commands. + struct Destroyer { + template + void operator()(T* record) { record->~T(); } + }; + + template + std::enable_if_t::value, T*> allocCommand() { + static T singleton = {}; + return &singleton; + } + + template + std::enable_if_t::value, T*> allocCommand() { return this->alloc(); } + + void grow(); + + // A typed pointer to some bytes in fAlloc. visit() and mutate() allow polymorphic dispatch. + struct Record { + SkRecords::Type fType; + void* fPtr; + + // Point this record to its data in fAlloc. Returns ptr for convenience. + template + T* set(T* ptr) { + fType = T::kType; + fPtr = ptr; + SkASSERT(this->ptr() == ptr && this->type() == T::kType); + return ptr; + } + + SkRecords::Type type() const { return fType; } + void* ptr() const { return fPtr; } + + // Visit this record with functor F (see public API above). + template + auto visit(F&& f) const -> decltype(f(SkRecords::NoOp())) { + #define CASE(T) case SkRecords::T##_Type: return f(*(const SkRecords::T*)this->ptr()); + switch(this->type()) { SK_RECORD_TYPES(CASE) } + #undef CASE + SkDEBUGFAIL("Unreachable"); + static const SkRecords::NoOp noop{}; + return f(noop); + } + + // Mutate this record with functor F (see public API above). + template + auto mutate(F&& f) -> decltype(f((SkRecords::NoOp*)nullptr)) { + #define CASE(T) case SkRecords::T##_Type: return f((SkRecords::T*)this->ptr()); + switch(this->type()) { SK_RECORD_TYPES(CASE) } + #undef CASE + SkDEBUGFAIL("Unreachable"); + static const SkRecords::NoOp noop{}; + return f(const_cast(&noop)); + } + }; + + // fRecords needs to be a data structure that can append fixed length data, and need to + // support efficient random access and forward iteration. (It doesn't need to be contiguous.) + int fCount{0}, + fReserved{0}; + skia_private::AutoTMalloc fRecords; + + // fAlloc needs to be a data structure which can append variable length data in contiguous + // chunks, returning a stable handle to that data for later retrieval. + SkArenaAlloc fAlloc{256}; + size_t fApproxBytesAllocated{0}; +}; + +#endif//SkRecord_DEFINED diff --git a/gfx/skia/skia/src/core/SkRecordDraw.cpp b/gfx/skia/skia/src/core/SkRecordDraw.cpp new file mode 100644 index 0000000000..1447cb049e --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecordDraw.cpp @@ -0,0 +1,590 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBBHFactory.h" +#include "include/core/SkImage.h" +#include "include/private/base/SkTDArray.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkRecordDraw.h" +#include "src/utils/SkPatchUtils.h" + +void SkRecordDraw(const SkRecord& record, + SkCanvas* canvas, + SkPicture const* const drawablePicts[], + SkDrawable* const drawables[], + int drawableCount, + const SkBBoxHierarchy* bbh, + SkPicture::AbortCallback* callback) { + SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/); + + if (bbh) { + // Draw only ops that affect pixels in the canvas's current clip. + // The SkRecord and BBH were recorded in identity space. This canvas + // is not necessarily in that same space. getLocalClipBounds() returns us + // this canvas' clip bounds transformed back into identity space, which + // lets us query the BBH. + SkRect query = canvas->getLocalClipBounds(); + + std::vector ops; + bbh->search(query, &ops); + + SkRecords::Draw draw(canvas, drawablePicts, drawables, drawableCount); + for (int i = 0; i < (int)ops.size(); i++) { + if (callback && callback->abort()) { + return; + } + // This visit call uses the SkRecords::Draw::operator() to call + // methods on the |canvas|, wrapped by methods defined with the + // DRAW() macro. + record.visit(ops[i], draw); + } + } else { + // Draw all ops. + SkRecords::Draw draw(canvas, drawablePicts, drawables, drawableCount); + for (int i = 0; i < record.count(); i++) { + if (callback && callback->abort()) { + return; + } + // This visit call uses the SkRecords::Draw::operator() to call + // methods on the |canvas|, wrapped by methods defined with the + // DRAW() macro. + record.visit(i, draw); + } + } +} + +void SkRecordPartialDraw(const SkRecord& record, SkCanvas* canvas, + SkPicture const* const drawablePicts[], int drawableCount, + int start, int stop, + const SkM44& initialCTM) { + SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/); + + stop = std::min(stop, record.count()); + SkRecords::Draw draw(canvas, drawablePicts, nullptr, drawableCount, &initialCTM); + for (int i = start; i < stop; i++) { + record.visit(i, draw); + } +} + +namespace SkRecords { + +// NoOps draw nothing. +template <> void Draw::draw(const NoOp&) {} + +#define DRAW(T, call) template <> void Draw::draw(const T& r) { fCanvas->call; } +DRAW(Flush, flush()) +DRAW(Restore, restore()) +DRAW(Save, save()) +DRAW(SaveLayer, saveLayer(SkCanvasPriv::ScaledBackdropLayer(r.bounds, + r.paint, + r.backdrop.get(), + r.backdropScale, + r.saveLayerFlags))) + +template <> void Draw::draw(const SaveBehind& r) { + SkCanvasPriv::SaveBehind(fCanvas, r.subset); +} + +template <> void Draw::draw(const DrawBehind& r) { + SkCanvasPriv::DrawBehind(fCanvas, r.paint); +} + +DRAW(SetMatrix, setMatrix(fInitialCTM.asM33() * r.matrix)) +DRAW(SetM44, setMatrix(fInitialCTM * r.matrix)) +DRAW(Concat44, concat(r.matrix)) +DRAW(Concat, concat(r.matrix)) +DRAW(Translate, translate(r.dx, r.dy)) +DRAW(Scale, scale(r.sx, r.sy)) + +DRAW(ClipPath, clipPath(r.path, r.opAA.op(), r.opAA.aa())) +DRAW(ClipRRect, clipRRect(r.rrect, r.opAA.op(), r.opAA.aa())) +DRAW(ClipRect, clipRect(r.rect, r.opAA.op(), r.opAA.aa())) +DRAW(ClipRegion, clipRegion(r.region, r.op)) +DRAW(ClipShader, clipShader(r.shader, r.op)) + +template <> void Draw::draw(const ResetClip& r) { + SkCanvasPriv::ResetClip(fCanvas); +} + +DRAW(DrawArc, drawArc(r.oval, r.startAngle, r.sweepAngle, r.useCenter, r.paint)) +DRAW(DrawDRRect, drawDRRect(r.outer, r.inner, r.paint)) +DRAW(DrawImage, drawImage(r.image.get(), r.left, r.top, r.sampling, r.paint)) + +template <> void Draw::draw(const DrawImageLattice& r) { + SkCanvas::Lattice lattice; + lattice.fXCount = r.xCount; + lattice.fXDivs = r.xDivs; + lattice.fYCount = r.yCount; + lattice.fYDivs = r.yDivs; + lattice.fRectTypes = (0 == r.flagCount) ? nullptr : r.flags; + lattice.fColors = (0 == r.flagCount) ? nullptr : r.colors; + lattice.fBounds = &r.src; + fCanvas->drawImageLattice(r.image.get(), lattice, r.dst, r.filter, r.paint); +} + +DRAW(DrawImageRect, drawImageRect(r.image.get(), r.src, r.dst, r.sampling, r.paint, r.constraint)) +DRAW(DrawOval, drawOval(r.oval, r.paint)) +DRAW(DrawPaint, drawPaint(r.paint)) +DRAW(DrawPath, drawPath(r.path, r.paint)) +DRAW(DrawPatch, drawPatch(r.cubics, r.colors, r.texCoords, r.bmode, r.paint)) +DRAW(DrawPicture, drawPicture(r.picture.get(), &r.matrix, r.paint)) +DRAW(DrawPoints, drawPoints(r.mode, r.count, r.pts, r.paint)) +DRAW(DrawRRect, drawRRect(r.rrect, r.paint)) +DRAW(DrawRect, drawRect(r.rect, r.paint)) +DRAW(DrawRegion, drawRegion(r.region, r.paint)) +DRAW(DrawTextBlob, drawTextBlob(r.blob.get(), r.x, r.y, r.paint)) +#if defined(SK_GANESH) +DRAW(DrawSlug, drawSlug(r.slug.get())) +#else +// Turn draw into a nop. +template <> void Draw::draw(const DrawSlug&) {} +#endif +DRAW(DrawAtlas, drawAtlas(r.atlas.get(), r.xforms, r.texs, r.colors, r.count, r.mode, r.sampling, + r.cull, r.paint)) +DRAW(DrawVertices, drawVertices(r.vertices, r.bmode, r.paint)) +#ifdef SK_ENABLE_SKSL +DRAW(DrawMesh, drawMesh(r.mesh, r.blender, r.paint)) +#else +// Turn draw into a nop. +template <> void Draw::draw(const DrawMesh&) {} +#endif +DRAW(DrawShadowRec, private_draw_shadow_rec(r.path, r.rec)) +DRAW(DrawAnnotation, drawAnnotation(r.rect, r.key.c_str(), r.value.get())) + +DRAW(DrawEdgeAAQuad, experimental_DrawEdgeAAQuad( + r.rect, r.clip, r.aa, r.color, r.mode)) +DRAW(DrawEdgeAAImageSet, experimental_DrawEdgeAAImageSet( + r.set.get(), r.count, r.dstClips, r.preViewMatrices, r.sampling, r.paint, r.constraint)) + +#undef DRAW + +template <> void Draw::draw(const DrawDrawable& r) { + SkASSERT(r.index >= 0); + SkASSERT(r.index < fDrawableCount); + if (fDrawables) { + SkASSERT(nullptr == fDrawablePicts); + fCanvas->drawDrawable(fDrawables[r.index], r.matrix); + } else { + fCanvas->drawPicture(fDrawablePicts[r.index], r.matrix, nullptr); + } +} + +// This is an SkRecord visitor that fills an SkBBoxHierarchy. +// +// The interesting part here is how to calculate bounds for ops which don't +// have intrinsic bounds. What is the bounds of a Save or a Translate? +// +// We answer this by thinking about a particular definition of bounds: if I +// don't execute this op, pixels in this rectangle might draw incorrectly. So +// the bounds of a Save, a Translate, a Restore, etc. are the union of the +// bounds of Draw* ops that they might have an effect on. For any given +// Save/Restore block, the bounds of the Save, the Restore, and any other +// non-drawing ("control") ops inside are exactly the union of the bounds of +// the drawing ops inside that block. +// +// To implement this, we keep a stack of active Save blocks. As we consume ops +// inside the Save/Restore block, drawing ops are unioned with the bounds of +// the block, and control ops are stashed away for later. When we finish the +// block with a Restore, our bounds are complete, and we go back and fill them +// in for all the control ops we stashed away. +class FillBounds : SkNoncopyable { +public: + FillBounds(const SkRect& cullRect, const SkRecord& record, + SkRect bounds[], SkBBoxHierarchy::Metadata meta[]) + : fCullRect(cullRect) + , fBounds(bounds) + , fMeta(meta) { + fCTM = SkMatrix::I(); + + // We push an extra save block to track the bounds of any top-level control operations. + fSaveStack.push_back({ 0, Bounds::MakeEmpty(), nullptr, fCTM }); + } + + ~FillBounds() { + // If we have any lingering unpaired Saves, simulate restores to make + // sure all ops in those Save blocks have their bounds calculated. + while (!fSaveStack.empty()) { + this->popSaveBlock(); + } + + // Any control ops not part of any Save/Restore block draw everywhere. + while (!fControlIndices.empty()) { + this->popControl(fCullRect); + } + } + + void setCurrentOp(int currentOp) { fCurrentOp = currentOp; } + + + template void operator()(const T& op) { + this->updateCTM(op); + this->trackBounds(op); + } + + // In this file, SkRect are in local coordinates, Bounds are translated back to identity space. + typedef SkRect Bounds; + + // Adjust rect for all paints that may affect its geometry, then map it to identity space. + Bounds adjustAndMap(SkRect rect, const SkPaint* paint) const { + // Inverted rectangles really confuse our BBHs. + rect.sort(); + + // Adjust the rect for its own paint. + if (!AdjustForPaint(paint, &rect)) { + // The paint could do anything to our bounds. The only safe answer is the cull. + return fCullRect; + } + + // Adjust rect for all the paints from the SaveLayers we're inside. + if (!this->adjustForSaveLayerPaints(&rect)) { + // Same deal as above. + return fCullRect; + } + + // Map the rect back to identity space. + fCTM.mapRect(&rect); + + // Nothing can draw outside the cull rect. + if (!rect.intersect(fCullRect)) { + return Bounds::MakeEmpty(); + } + + return rect; + } + +private: + struct SaveBounds { + int controlOps; // Number of control ops in this Save block, including the Save. + Bounds bounds; // Bounds of everything in the block. + const SkPaint* paint; // Unowned. If set, adjusts the bounds of all ops in this block. + SkMatrix ctm; + }; + + // Only Restore, SetMatrix, Concat, and Translate change the CTM. + template void updateCTM(const T&) {} + void updateCTM(const Restore& op) { fCTM = op.matrix; } + void updateCTM(const SetMatrix& op) { fCTM = op.matrix; } + void updateCTM(const SetM44& op) { fCTM = op.matrix.asM33(); } + void updateCTM(const Concat44& op) { fCTM.preConcat(op.matrix.asM33()); } + void updateCTM(const Concat& op) { fCTM.preConcat(op.matrix); } + void updateCTM(const Scale& op) { fCTM.preScale(op.sx, op.sy); } + void updateCTM(const Translate& op) { fCTM.preTranslate(op.dx, op.dy); } + + // The bounds of these ops must be calculated when we hit the Restore + // from the bounds of the ops in the same Save block. + void trackBounds(const Save&) { this->pushSaveBlock(nullptr); } + void trackBounds(const SaveLayer& op) { this->pushSaveBlock(op.paint); } + void trackBounds(const SaveBehind&) { this->pushSaveBlock(nullptr); } + void trackBounds(const Restore&) { + const bool isSaveLayer = fSaveStack.back().paint != nullptr; + fBounds[fCurrentOp] = this->popSaveBlock(); + fMeta [fCurrentOp].isDraw = isSaveLayer; + } + + void trackBounds(const SetMatrix&) { this->pushControl(); } + void trackBounds(const SetM44&) { this->pushControl(); } + void trackBounds(const Concat&) { this->pushControl(); } + void trackBounds(const Concat44&) { this->pushControl(); } + void trackBounds(const Scale&) { this->pushControl(); } + void trackBounds(const Translate&) { this->pushControl(); } + void trackBounds(const ClipRect&) { this->pushControl(); } + void trackBounds(const ClipRRect&) { this->pushControl(); } + void trackBounds(const ClipPath&) { this->pushControl(); } + void trackBounds(const ClipRegion&) { this->pushControl(); } + void trackBounds(const ClipShader&) { this->pushControl(); } + void trackBounds(const ResetClip&) { this->pushControl(); } + + + // For all other ops, we can calculate and store the bounds directly now. + template void trackBounds(const T& op) { + fBounds[fCurrentOp] = this->bounds(op); + fMeta [fCurrentOp].isDraw = true; + this->updateSaveBounds(fBounds[fCurrentOp]); + } + + void pushSaveBlock(const SkPaint* paint) { + // Starting a new Save block. Push a new entry to represent that. + SaveBounds sb; + sb.controlOps = 0; + // If the paint affects transparent black, + // the bound shouldn't be smaller than the cull. + sb.bounds = + PaintMayAffectTransparentBlack(paint) ? fCullRect : Bounds::MakeEmpty(); + sb.paint = paint; + sb.ctm = this->fCTM; + + fSaveStack.push_back(sb); + this->pushControl(); + } + + static bool PaintMayAffectTransparentBlack(const SkPaint* paint) { + if (paint) { + // FIXME: this is very conservative + if ((paint->getImageFilter() && + as_IFB(paint->getImageFilter())->affectsTransparentBlack()) || + (paint->getColorFilter() && + as_CFB(paint->getColorFilter())->affectsTransparentBlack())) { + return true; + } + const auto bm = paint->asBlendMode(); + if (!bm) { + return true; // can we query other blenders for this? + } + + // Unusual blendmodes require us to process a saved layer + // even with operations outisde the clip. + // For example, DstIn is used by masking layers. + // https://code.google.com/p/skia/issues/detail?id=1291 + // https://crbug.com/401593 + switch (bm.value()) { + // For each of the following transfer modes, if the source + // alpha is zero (our transparent black), the resulting + // blended alpha is not necessarily equal to the original + // destination alpha. + case SkBlendMode::kClear: + case SkBlendMode::kSrc: + case SkBlendMode::kSrcIn: + case SkBlendMode::kDstIn: + case SkBlendMode::kSrcOut: + case SkBlendMode::kDstATop: + case SkBlendMode::kModulate: + return true; + default: + break; + } + } + return false; + } + + Bounds popSaveBlock() { + // We're done the Save block. Apply the block's bounds to all control ops inside it. + SaveBounds sb = fSaveStack.back(); + fSaveStack.pop_back(); + + while (sb.controlOps --> 0) { + this->popControl(sb.bounds); + } + + // This whole Save block may be part another Save block. + this->updateSaveBounds(sb.bounds); + + // If called from a real Restore (not a phony one for balance), it'll need the bounds. + return sb.bounds; + } + + void pushControl() { + fControlIndices.push_back(fCurrentOp); + if (!fSaveStack.empty()) { + fSaveStack.back().controlOps++; + } + } + + void popControl(const Bounds& bounds) { + fBounds[fControlIndices.back()] = bounds; + fMeta [fControlIndices.back()].isDraw = false; + fControlIndices.pop_back(); + } + + void updateSaveBounds(const Bounds& bounds) { + // If we're in a Save block, expand its bounds to cover these bounds too. + if (!fSaveStack.empty()) { + fSaveStack.back().bounds.join(bounds); + } + } + + Bounds bounds(const Flush&) const { return fCullRect; } + + Bounds bounds(const DrawPaint&) const { return fCullRect; } + Bounds bounds(const DrawBehind&) const { return fCullRect; } + Bounds bounds(const NoOp&) const { return Bounds::MakeEmpty(); } // NoOps don't draw. + + Bounds bounds(const DrawRect& op) const { return this->adjustAndMap(op.rect, &op.paint); } + Bounds bounds(const DrawRegion& op) const { + SkRect rect = SkRect::Make(op.region.getBounds()); + return this->adjustAndMap(rect, &op.paint); + } + Bounds bounds(const DrawOval& op) const { return this->adjustAndMap(op.oval, &op.paint); } + // Tighter arc bounds? + Bounds bounds(const DrawArc& op) const { return this->adjustAndMap(op.oval, &op.paint); } + Bounds bounds(const DrawRRect& op) const { + return this->adjustAndMap(op.rrect.rect(), &op.paint); + } + Bounds bounds(const DrawDRRect& op) const { + return this->adjustAndMap(op.outer.rect(), &op.paint); + } + Bounds bounds(const DrawImage& op) const { + const SkImage* image = op.image.get(); + SkRect rect = SkRect::MakeXYWH(op.left, op.top, image->width(), image->height()); + + return this->adjustAndMap(rect, op.paint); + } + Bounds bounds(const DrawImageLattice& op) const { + return this->adjustAndMap(op.dst, op.paint); + } + Bounds bounds(const DrawImageRect& op) const { + return this->adjustAndMap(op.dst, op.paint); + } + Bounds bounds(const DrawPath& op) const { + return op.path.isInverseFillType() ? fCullRect + : this->adjustAndMap(op.path.getBounds(), &op.paint); + } + Bounds bounds(const DrawPoints& op) const { + SkRect dst; + dst.setBounds(op.pts, op.count); + + // Pad the bounding box a little to make sure hairline points' bounds aren't empty. + SkScalar stroke = std::max(op.paint.getStrokeWidth(), 0.01f); + dst.outset(stroke/2, stroke/2); + + return this->adjustAndMap(dst, &op.paint); + } + Bounds bounds(const DrawPatch& op) const { + SkRect dst; + dst.setBounds(op.cubics, SkPatchUtils::kNumCtrlPts); + return this->adjustAndMap(dst, &op.paint); + } + Bounds bounds(const DrawVertices& op) const { + return this->adjustAndMap(op.vertices->bounds(), &op.paint); + } + Bounds bounds(const DrawMesh& op) const { +#ifdef SK_ENABLE_SKSL + return this->adjustAndMap(op.mesh.bounds(), &op.paint); +#else + return SkRect::MakeEmpty(); +#endif + } + Bounds bounds(const DrawAtlas& op) const { + if (op.cull) { + // TODO: can we pass nullptr for the paint? Isn't cull already "correct" + // for the paint (by the caller)? + return this->adjustAndMap(*op.cull, op.paint); + } else { + return fCullRect; + } + } + + Bounds bounds(const DrawShadowRec& op) const { + SkRect bounds; + SkDrawShadowMetrics::GetLocalBounds(op.path, op.rec, fCTM, &bounds); + return this->adjustAndMap(bounds, nullptr); + } + + Bounds bounds(const DrawPicture& op) const { + SkRect dst = op.picture->cullRect(); + op.matrix.mapRect(&dst); + return this->adjustAndMap(dst, op.paint); + } + + Bounds bounds(const DrawTextBlob& op) const { + SkRect dst = op.blob->bounds(); + dst.offset(op.x, op.y); + return this->adjustAndMap(dst, &op.paint); + } + +#if defined(SK_GANESH) + Bounds bounds(const DrawSlug& op) const { + SkRect dst = op.slug->sourceBoundsWithOrigin(); + return this->adjustAndMap(dst, &op.slug->initialPaint()); + } +#else + Bounds bounds(const DrawSlug& op) const { + return SkRect::MakeEmpty(); + } +#endif + + Bounds bounds(const DrawDrawable& op) const { + return this->adjustAndMap(op.worstCaseBounds, nullptr); + } + + Bounds bounds(const DrawAnnotation& op) const { + return this->adjustAndMap(op.rect, nullptr); + } + Bounds bounds(const DrawEdgeAAQuad& op) const { + SkRect bounds = op.rect; + if (op.clip) { + bounds.setBounds(op.clip, 4); + } + return this->adjustAndMap(bounds, nullptr); + } + Bounds bounds(const DrawEdgeAAImageSet& op) const { + SkRect rect = SkRect::MakeEmpty(); + int clipIndex = 0; + for (int i = 0; i < op.count; ++i) { + SkRect entryBounds = op.set[i].fDstRect; + if (op.set[i].fHasClip) { + entryBounds.setBounds(op.dstClips + clipIndex, 4); + clipIndex += 4; + } + if (op.set[i].fMatrixIndex >= 0) { + op.preViewMatrices[op.set[i].fMatrixIndex].mapRect(&entryBounds); + } + rect.join(this->adjustAndMap(entryBounds, nullptr)); + } + return rect; + } + + // Returns true if rect was meaningfully adjusted for the effects of paint, + // false if the paint could affect the rect in unknown ways. + static bool AdjustForPaint(const SkPaint* paint, SkRect* rect) { + if (paint) { + if (paint->canComputeFastBounds()) { + *rect = paint->computeFastBounds(*rect, rect); + return true; + } + return false; + } + return true; + } + + bool adjustForSaveLayerPaints(SkRect* rect, int savesToIgnore = 0) const { + for (int i = fSaveStack.size() - 1 - savesToIgnore; i >= 0; i--) { + SkMatrix inverse; + if (!fSaveStack[i].ctm.invert(&inverse)) { + return false; + } + inverse.mapRect(rect); + if (!AdjustForPaint(fSaveStack[i].paint, rect)) { + return false; + } + fSaveStack[i].ctm.mapRect(rect); + } + return true; + } + + // We do not guarantee anything for operations outside of the cull rect + const SkRect fCullRect; + + // Conservative identity-space bounds for each op in the SkRecord. + Bounds* fBounds; + + // Parallel array to fBounds, holding metadata for each bounds rect. + SkBBoxHierarchy::Metadata* fMeta; + + // We walk fCurrentOp through the SkRecord, + // as we go using updateCTM() to maintain the exact CTM (fCTM). + int fCurrentOp; + SkMatrix fCTM; + + // Used to track the bounds of Save/Restore blocks and the control ops inside them. + SkTDArray fSaveStack; + SkTDArray fControlIndices; +}; + +} // namespace SkRecords + +void SkRecordFillBounds(const SkRect& cullRect, const SkRecord& record, + SkRect bounds[], SkBBoxHierarchy::Metadata meta[]) { + { + SkRecords::FillBounds visitor(cullRect, record, bounds, meta); + for (int i = 0; i < record.count(); i++) { + visitor.setCurrentOp(i); + record.visit(i, visitor); + } + } +} diff --git a/gfx/skia/skia/src/core/SkRecordDraw.h b/gfx/skia/skia/src/core/SkRecordDraw.h new file mode 100644 index 0000000000..ca060ea7f0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecordDraw.h @@ -0,0 +1,83 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRecordDraw_DEFINED +#define SkRecordDraw_DEFINED + +#include "include/core/SkBBHFactory.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkMatrix.h" +#include "src/core/SkBigPicture.h" +#include "src/core/SkRecord.h" + +class SkDrawable; +class SkLayerInfo; + +// Calculate conservative identity space bounds for each op in the record. +void SkRecordFillBounds(const SkRect& cullRect, const SkRecord&, + SkRect bounds[], SkBBoxHierarchy::Metadata[]); + +// SkRecordFillBounds(), and gathers information about saveLayers and stores it for later +// use (e.g., layer hoisting). The gathered information is sufficient to determine +// where each saveLayer will land and which ops in the picture it represents. +void SkRecordComputeLayers(const SkRect& cullRect, const SkRecord&, SkRect bounds[], + const SkBigPicture::SnapshotArray*, SkLayerInfo* data); + +// Draw an SkRecord into an SkCanvas. A convenience wrapper around SkRecords::Draw. +void SkRecordDraw(const SkRecord&, SkCanvas*, SkPicture const* const drawablePicts[], + SkDrawable* const drawables[], int drawableCount, + const SkBBoxHierarchy*, SkPicture::AbortCallback*); + +// Draw a portion of an SkRecord into an SkCanvas. +// When drawing a portion of an SkRecord the CTM on the passed in canvas must be +// the composition of the replay matrix with the record-time CTM (for the portion +// of the record that is being replayed). For setMatrix calls to behave correctly +// the initialCTM parameter must set to just the replay matrix. +void SkRecordPartialDraw(const SkRecord&, SkCanvas*, + SkPicture const* const drawablePicts[], int drawableCount, + int start, int stop, const SkM44& initialCTM); + +namespace SkRecords { + +// This is an SkRecord visitor that will draw that SkRecord to an SkCanvas. +class Draw : SkNoncopyable { +public: + explicit Draw(SkCanvas* canvas, SkPicture const* const drawablePicts[], + SkDrawable* const drawables[], int drawableCount, + const SkM44* initialCTM = nullptr) + : fInitialCTM(initialCTM ? *initialCTM : canvas->getLocalToDevice()) + , fCanvas(canvas) + , fDrawablePicts(drawablePicts) + , fDrawables(drawables) + , fDrawableCount(drawableCount) + {} + + // This operator calls methods on the |canvas|. The various draw() wrapper + // methods around SkCanvas are defined by the DRAW() macro in + // SkRecordDraw.cpp. + template void operator()(const T& r) { + this->draw(r); + } + +protected: + SkPicture const* const* drawablePicts() const { return fDrawablePicts; } + int drawableCount() const { return fDrawableCount; } + +private: + // No base case, so we'll be compile-time checked that we implement all possibilities. + template void draw(const T&); + + const SkM44 fInitialCTM; + SkCanvas* fCanvas; + SkPicture const* const* fDrawablePicts; + SkDrawable* const* fDrawables; + int fDrawableCount; +}; + +} // namespace SkRecords + +#endif//SkRecordDraw_DEFINED diff --git a/gfx/skia/skia/src/core/SkRecordOpts.cpp b/gfx/skia/skia/src/core/SkRecordOpts.cpp new file mode 100644 index 0000000000..88e8493064 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecordOpts.cpp @@ -0,0 +1,314 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkRecordOpts.h" + +#include "include/private/base/SkTDArray.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkRecordPattern.h" +#include "src/core/SkRecords.h" + +using namespace SkRecords; + +// Most of the optimizations in this file are pattern-based. These are all defined as structs with: +// - a Match typedef +// - a bool onMatch(SkRceord*, Match*, int begin, int end) method, +// which returns true if it made changes and false if not. + +// Run a pattern-based optimization once across the SkRecord, returning true if it made any changes. +// It looks for spans which match Pass::Match, and when found calls onMatch() with that pattern, +// record, and [begin,end) span of the commands that matched. +template +static bool apply(Pass* pass, SkRecord* record) { + typename Pass::Match match; + bool changed = false; + int begin, end = 0; + + while (match.search(record, &begin, &end)) { + changed |= pass->onMatch(record, &match, begin, end); + } + return changed; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static void multiple_set_matrices(SkRecord* record) { + struct { + typedef Pattern, + Greedy>, + Is > + Match; + + bool onMatch(SkRecord* record, Match* pattern, int begin, int end) { + record->replace(begin); // first SetMatrix + return true; + } + } pass; + while (apply(&pass, record)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#if 0 // experimental, but needs knowledge of previous matrix to operate correctly +static void apply_matrix_to_draw_params(SkRecord* record) { + struct { + typedef Pattern, + Greedy>, + Is > + Pattern; + + bool onMatch(SkRecord* record, Pattern* pattern, int begin, int end) { + record->replace(begin); // first SetMatrix + return true; + } + } pass; + // No need to loop, as we never "open up" opportunities for more of this type of optimization. + apply(&pass, record); +} +#endif + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +// Turns the logical NoOp Save and Restore in Save-Draw*-Restore patterns into actual NoOps. +struct SaveOnlyDrawsRestoreNooper { + typedef Pattern, + Greedy, IsDraw>>, + Is> + Match; + + bool onMatch(SkRecord* record, Match*, int begin, int end) { + record->replace(begin); // Save + record->replace(end-1); // Restore + return true; + } +}; + +static bool fold_opacity_layer_color_to_paint(const SkPaint* layerPaint, + bool isSaveLayer, + SkPaint* paint) { + // We assume layerPaint is always from a saveLayer. If isSaveLayer is + // true, we assume paint is too. + + // The alpha folding can proceed if the filter layer paint does not have properties which cause + // the resulting filter layer to be "blended" in complex ways to the parent layer. + // TODO: most likely only some xfer modes are the hard constraints + if (!paint->isSrcOver()) { + return false; + } + + if (!isSaveLayer && paint->getImageFilter()) { + // For normal draws, the paint color is used as one input for the color for the draw. Image + // filter will operate on the result, and thus we can not change the input. + // For layer saves, the image filter is applied to the layer contents. The layer is then + // modulated with the paint color, so it's fine to proceed with the fold for saveLayer + // paints with image filters. + return false; + } + + if (paint->getColorFilter()) { + // Filter input depends on the paint color. + + // Here we could filter the color if we knew the draw is going to be uniform color. This + // should be detectable as drawPath/drawRect/.. without a shader being uniform, while + // drawBitmap/drawSprite or a shader being non-uniform. However, current matchers don't + // give the type out easily, so just do not optimize that at the moment. + return false; + } + + if (layerPaint) { + const uint32_t layerColor = layerPaint->getColor(); + // The layer paint color must have only alpha component. + if (SK_ColorTRANSPARENT != SkColorSetA(layerColor, SK_AlphaTRANSPARENT)) { + return false; + } + + // The layer paint can not have any effects. + if (layerPaint->getPathEffect() || + layerPaint->getShader() || + !layerPaint->isSrcOver() || + layerPaint->getMaskFilter() || + layerPaint->getColorFilter() || + layerPaint->getImageFilter()) { + return false; + } + paint->setAlpha(SkMulDiv255Round(paint->getAlpha(), SkColorGetA(layerColor))); + } + + return true; +} + +// Turns logical no-op Save-[non-drawing command]*-Restore patterns into actual no-ops. +struct SaveNoDrawsRestoreNooper { + // Greedy matches greedily, so we also have to exclude Save and Restore. + // Nested SaveLayers need to be excluded, or we'll match their Restore! + typedef Pattern, + Greedy, + Is, + Is, + IsDraw>>>, + Is> + Match; + + bool onMatch(SkRecord* record, Match*, int begin, int end) { + // The entire span between Save and Restore (inclusively) does nothing. + for (int i = begin; i < end; i++) { + record->replace(i); + } + return true; + } +}; +void SkRecordNoopSaveRestores(SkRecord* record) { + SaveOnlyDrawsRestoreNooper onlyDraws; + SaveNoDrawsRestoreNooper noDraws; + + // Run until they stop changing things. + while (apply(&onlyDraws, record) || apply(&noDraws, record)); +} + +#ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK +static bool effectively_srcover(const SkPaint* paint) { + if (!paint || paint->isSrcOver()) { + return true; + } + // src-mode with opaque and no effects (which might change opaqueness) is ok too. + return !paint->getShader() && !paint->getColorFilter() && !paint->getImageFilter() && + 0xFF == paint->getAlpha() && paint->asBlendMode() == SkBlendMode::kSrc; +} + +// For some SaveLayer-[drawing command]-Restore patterns, merge the SaveLayer's alpha into the +// draw, and no-op the SaveLayer and Restore. +struct SaveLayerDrawRestoreNooper { + typedef Pattern, IsDraw, Is> Match; + + bool onMatch(SkRecord* record, Match* match, int begin, int end) { + if (match->first()->backdrop) { + // can't throw away the layer if we have a backdrop + return false; + } + + // A SaveLayer's bounds field is just a hint, so we should be free to ignore it. + SkPaint* layerPaint = match->first()->paint; + SkPaint* drawPaint = match->second(); + + if (nullptr == layerPaint && effectively_srcover(drawPaint)) { + // There wasn't really any point to this SaveLayer at all. + return KillSaveLayerAndRestore(record, begin); + } + + if (drawPaint == nullptr) { + // We can just give the draw the SaveLayer's paint. + // TODO(mtklein): figure out how to do this clearly + return false; + } + + if (!fold_opacity_layer_color_to_paint(layerPaint, false /*isSaveLayer*/, drawPaint)) { + return false; + } + + return KillSaveLayerAndRestore(record, begin); + } + + static bool KillSaveLayerAndRestore(SkRecord* record, int saveLayerIndex) { + record->replace(saveLayerIndex); // SaveLayer + record->replace(saveLayerIndex+2); // Restore + return true; + } +}; +void SkRecordNoopSaveLayerDrawRestores(SkRecord* record) { + SaveLayerDrawRestoreNooper pass; + apply(&pass, record); +} +#endif + +/* For SVG generated: + SaveLayer (non-opaque, typically for CSS opacity) + Save + ClipRect + SaveLayer (typically for SVG filter) + Restore + Restore + Restore +*/ +struct SvgOpacityAndFilterLayerMergePass { + typedef Pattern, Is, Is, Is, + Is, Is, Is> Match; + + bool onMatch(SkRecord* record, Match* match, int begin, int end) { + if (match->first()->backdrop) { + // can't throw away the layer if we have a backdrop + return false; + } + + SkPaint* opacityPaint = match->first()->paint; + if (nullptr == opacityPaint) { + // There wasn't really any point to this SaveLayer at all. + return KillSaveLayerAndRestore(record, begin); + } + + // This layer typically contains a filter, but this should work for layers with for other + // purposes too. + SkPaint* filterLayerPaint = match->fourth()->paint; + if (filterLayerPaint == nullptr) { + // We can just give the inner SaveLayer the paint of the outer SaveLayer. + // TODO(mtklein): figure out how to do this clearly + return false; + } + + if (!fold_opacity_layer_color_to_paint(opacityPaint, true /*isSaveLayer*/, + filterLayerPaint)) { + return false; + } + + return KillSaveLayerAndRestore(record, begin); + } + + static bool KillSaveLayerAndRestore(SkRecord* record, int saveLayerIndex) { + record->replace(saveLayerIndex); // SaveLayer + record->replace(saveLayerIndex + 6); // Restore + return true; + } +}; + +void SkRecordMergeSvgOpacityAndFilterLayers(SkRecord* record) { + SvgOpacityAndFilterLayerMergePass pass; + apply(&pass, record); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkRecordOptimize(SkRecord* record) { + // This might be useful as a first pass in the future if we want to weed + // out junk for other optimization passes. Right now, nothing needs it, + // and the bounding box hierarchy will do the work of skipping no-op + // Save-NoDraw-Restore sequences better than we can here. + // As there is a known problem with this peephole and drawAnnotation, disable this. + // If we want to enable this we must first fix this bug: + // https://bugs.chromium.org/p/skia/issues/detail?id=5548 +// SkRecordNoopSaveRestores(record); + + // Turn off this optimization completely for Android framework + // because it makes the following Android CTS test fail: + // android.uirendering.cts.testclasses.LayerTests#testSaveLayerClippedWithAlpha +#ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK + SkRecordNoopSaveLayerDrawRestores(record); +#endif + SkRecordMergeSvgOpacityAndFilterLayers(record); + + record->defrag(); +} + +void SkRecordOptimize2(SkRecord* record) { + multiple_set_matrices(record); + SkRecordNoopSaveRestores(record); + // See why we turn this off in SkRecordOptimize above. +#ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK + SkRecordNoopSaveLayerDrawRestores(record); +#endif + SkRecordMergeSvgOpacityAndFilterLayers(record); + + record->defrag(); +} diff --git a/gfx/skia/skia/src/core/SkRecordOpts.h b/gfx/skia/skia/src/core/SkRecordOpts.h new file mode 100644 index 0000000000..a1e3c245a0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecordOpts.h @@ -0,0 +1,32 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRecordOpts_DEFINED +#define SkRecordOpts_DEFINED + +#include "src/core/SkRecord.h" + +// Run all optimizations in recommended order. +void SkRecordOptimize(SkRecord*); + +// Turns logical no-op Save-[non-drawing command]*-Restore patterns into actual no-ops. +void SkRecordNoopSaveRestores(SkRecord*); + +#ifndef SK_BUILD_FOR_ANDROID_FRAMEWORK +// For some SaveLayer-[drawing command]-Restore patterns, merge the SaveLayer's alpha into the +// draw, and no-op the SaveLayer and Restore. +void SkRecordNoopSaveLayerDrawRestores(SkRecord*); +#endif + +// For SVG generated SaveLayer-Save-ClipRect-SaveLayer-3xRestore patterns, merge +// the alpha of the first SaveLayer to the second SaveLayer. +void SkRecordMergeSvgOpacityAndFilterLayers(SkRecord*); + +// Experimental optimizers +void SkRecordOptimize2(SkRecord*); + +#endif//SkRecordOpts_DEFINED diff --git a/gfx/skia/skia/src/core/SkRecordPattern.h b/gfx/skia/skia/src/core/SkRecordPattern.h new file mode 100644 index 0000000000..4244fbb3e6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecordPattern.h @@ -0,0 +1,177 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRecordPattern_DEFINED +#define SkRecordPattern_DEFINED + +#include "include/private/base/SkTLogic.h" +#include "src/core/SkRecord.h" + +namespace SkRecords { + +// First, some matchers. These match a single command in the SkRecord, +// and may hang onto some data from it. If so, you can get the data by calling .get(). + +// Matches a command of type T, and stores that command. +template +class Is { +public: + Is() : fPtr(nullptr) {} + + typedef T type; + type* get() { return fPtr; } + + bool operator()(T* ptr) { + fPtr = ptr; + return true; + } + + template + bool operator()(U*) { + fPtr = nullptr; + return false; + } + +private: + type* fPtr; +}; + +// Matches any command that draws, and stores its paint. +class IsDraw { +public: + IsDraw() : fPaint(nullptr) {} + + typedef SkPaint type; + type* get() { return fPaint; } + + template + std::enable_if_t<(T::kTags & kDrawWithPaint_Tag) == kDrawWithPaint_Tag, bool> + operator()(T* draw) { + fPaint = AsPtr(draw->paint); + return true; + } + + template + std::enable_if_t<(T::kTags & kDrawWithPaint_Tag) == kDraw_Tag, bool> operator()(T* draw) { + fPaint = nullptr; + return true; + } + + template + std::enable_if_t operator()(T* draw) { + fPaint = nullptr; + return false; + } + +private: + // Abstracts away whether the paint is always part of the command or optional. + template static T* AsPtr(SkRecords::Optional& x) { return x; } + template static T* AsPtr(T& x) { return &x; } + + type* fPaint; +}; + +// Matches if Matcher doesn't. Stores nothing. +template +struct Not { + template + bool operator()(T* ptr) { return !Matcher()(ptr); } +}; + +// Matches if any of First or Rest... does. Stores nothing. +template +struct Or { + template + bool operator()(T* ptr) { return First()(ptr) || Or()(ptr); } +}; +template +struct Or { + template + bool operator()(T* ptr) { return First()(ptr); } +}; + + +// Greedy is a special matcher that greedily matches Matcher 0 or more times. Stores nothing. +template +struct Greedy { + template + bool operator()(T* ptr) { return Matcher()(ptr); } +}; + +// Pattern matches each of its matchers in order. +// +// This is the main entry point to pattern matching, and so provides a couple of extra API bits: +// - search scans through the record to look for matches; +// - first, second, third, ... return the data stored by their respective matchers in the pattern. + +template class Pattern; + +template <> class Pattern<> { +public: + // Bottoms out recursion. Just return whatever i the front decided on. + int match(SkRecord*, int i) { return i; } +}; + +template +class Pattern { +public: + // If this pattern matches the SkRecord starting from i, + // return the index just past the end of the pattern, otherwise return 0. + SK_ALWAYS_INLINE int match(SkRecord* record, int i) { + i = this->matchFirst(&fFirst, record, i); + return i > 0 ? fRest.match(record, i) : 0; + } + + // Starting from *end, walk through the SkRecord to find the first span matching this pattern. + // If there is no such span, return false. If there is, return true and set [*begin, *end). + SK_ALWAYS_INLINE bool search(SkRecord* record, int* begin, int* end) { + for (*begin = *end; *begin < record->count(); ++(*begin)) { + *end = this->match(record, *begin); + if (*end != 0) { + return true; + } + } + return false; + } + + // TODO: some sort of smart get() + template T* first() { return fFirst.get(); } + template T* second() { return fRest.template first(); } + template T* third() { return fRest.template second(); } + template T* fourth() { return fRest.template third(); } + +private: + // If first isn't a Greedy, try to match at i once. + template + int matchFirst(T* first, SkRecord* record, int i) { + if (i < record->count()) { + if (record->mutate(i, *first)) { + return i+1; + } + } + return 0; + } + + // If first is a Greedy, walk i until it doesn't match. + template + int matchFirst(Greedy* first, SkRecord* record, int i) { + while (i < record->count()) { + if (!record->mutate(i, *first)) { + return i; + } + i++; + } + return 0; + } + + First fFirst; + Pattern fRest; +}; + +} // namespace SkRecords + +#endif//SkRecordPattern_DEFINED diff --git a/gfx/skia/skia/src/core/SkRecordedDrawable.cpp b/gfx/skia/skia/src/core/SkRecordedDrawable.cpp new file mode 100644 index 0000000000..0f24468c55 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecordedDrawable.cpp @@ -0,0 +1,104 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkMatrix.h" +#include "include/core/SkPictureRecorder.h" +#include "src/core/SkPictureData.h" +#include "src/core/SkPicturePlayback.h" +#include "src/core/SkPictureRecord.h" +#include "src/core/SkRecordDraw.h" +#include "src/core/SkRecordedDrawable.h" + +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +size_t SkRecordedDrawable::onApproximateBytesUsed() { + size_t drawablesSize = 0; + if (fDrawableList) { + for (auto&& drawable : *fDrawableList) { + drawablesSize += drawable->approximateBytesUsed(); + } + } + return sizeof(*this) + + (fRecord ? fRecord->bytesUsed() : 0) + + (fBBH ? fBBH->bytesUsed() : 0) + + drawablesSize; +} + +void SkRecordedDrawable::onDraw(SkCanvas* canvas) { + SkDrawable* const* drawables = nullptr; + int drawableCount = 0; + if (fDrawableList) { + drawables = fDrawableList->begin(); + drawableCount = fDrawableList->count(); + } + SkRecordDraw(*fRecord, canvas, nullptr, drawables, drawableCount, fBBH.get(), nullptr); +} + +SkPicture* SkRecordedDrawable::onNewPictureSnapshot() { + // TODO: should we plumb-down the BBHFactory and recordFlags from our host + // PictureRecorder? + std::unique_ptr pictList{ + fDrawableList ? fDrawableList->newDrawableSnapshot() : nullptr + }; + + size_t subPictureBytes = 0; + for (int i = 0; pictList && i < pictList->count(); i++) { + subPictureBytes += pictList->begin()[i]->approximateBytesUsed(); + } + return new SkBigPicture(fBounds, fRecord, std::move(pictList), fBBH, subPictureBytes); +} + +void SkRecordedDrawable::flatten(SkWriteBuffer& buffer) const { + // Write the bounds. + buffer.writeRect(fBounds); + + // Create an SkPictureRecord to record the draw commands. + SkPictInfo info; + SkPictureRecord pictureRecord(SkISize::Make(fBounds.width(), fBounds.height()), 0); + + // If the query contains the whole picture, don't bother with the bounding box hierarchy. + SkBBoxHierarchy* bbh; + if (pictureRecord.getLocalClipBounds().contains(fBounds)) { + bbh = nullptr; + } else { + bbh = fBBH.get(); + } + + // Record the draw commands. + SkDrawable* const* drawables = fDrawableList ? fDrawableList->begin() : nullptr; + int drawableCount = fDrawableList ? fDrawableList->count() : 0; + pictureRecord.beginRecording(); + SkRecordDraw(*fRecord, &pictureRecord, nullptr, drawables, drawableCount, bbh, nullptr); + pictureRecord.endRecording(); + + // Flatten the recorded commands and drawables. + SkPictureData pictureData(pictureRecord, info); + pictureData.flatten(buffer); +} + +sk_sp SkRecordedDrawable::CreateProc(SkReadBuffer& buffer) { + // Read the bounds. + SkRect bounds; + buffer.readRect(&bounds); + + // Unflatten into a SkPictureData. + SkPictInfo info; + info.setVersion(buffer.getVersion()); + info.fCullRect = bounds; + std::unique_ptr pictureData(SkPictureData::CreateFromBuffer(buffer, info)); + if (!pictureData) { + return nullptr; + } + + // Create a drawable. + SkPicturePlayback playback(pictureData.get()); + SkPictureRecorder recorder; + playback.draw(recorder.beginRecording(bounds), nullptr, &buffer); + return recorder.finishRecordingAsDrawable(); +} diff --git a/gfx/skia/skia/src/core/SkRecordedDrawable.h b/gfx/skia/skia/src/core/SkRecordedDrawable.h new file mode 100644 index 0000000000..15914b4e9e --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecordedDrawable.h @@ -0,0 +1,42 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkRecordedDrawable_DEFINED +#define SkRecordedDrawable_DEFINED + +#include "include/core/SkDrawable.h" +#include "src/core/SkRecord.h" +#include "src/core/SkRecorder.h" + +class SkRecordedDrawable : public SkDrawable { +public: + SkRecordedDrawable(sk_sp record, sk_sp bbh, + std::unique_ptr drawableList, const SkRect& bounds) + : fRecord(std::move(record)) + , fBBH(std::move(bbh)) + , fDrawableList(std::move(drawableList)) + , fBounds(bounds) + {} + + void flatten(SkWriteBuffer& buffer) const override; + +protected: + SkRect onGetBounds() override { return fBounds; } + size_t onApproximateBytesUsed() override; + + void onDraw(SkCanvas* canvas) override; + + SkPicture* onNewPictureSnapshot() override; + +private: + SK_FLATTENABLE_HOOKS(SkRecordedDrawable) + + sk_sp fRecord; + sk_sp fBBH; + std::unique_ptr fDrawableList; + const SkRect fBounds; +}; +#endif // SkRecordedDrawable_DEFINED diff --git a/gfx/skia/skia/src/core/SkRecorder.cpp b/gfx/skia/skia/src/core/SkRecorder.cpp new file mode 100644 index 0000000000..b1eebded69 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecorder.cpp @@ -0,0 +1,423 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkRecorder.h" + +#include "include/core/SkCanvas.h" +#include "include/core/SkData.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPicture.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkRect.h" +#include "include/core/SkShader.h" +#include "include/core/SkString.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTextBlob.h" +#include "include/core/SkVertices.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkBigPicture.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkRecord.h" +#include "src/core/SkRecords.h" +#include "src/text/GlyphRun.h" +#include "src/utils/SkPatchUtils.h" + +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +#include +#include +#include +#include + +class SkBlender; +class SkMesh; +class SkPath; +class SkRRect; +class SkRegion; +class SkSurfaceProps; +enum class SkBlendMode; +enum class SkClipOp; +struct SkDrawShadowRec; + +using namespace skia_private; + +SkDrawableList::~SkDrawableList() { + for(SkDrawable* p : fArray) { + p->unref(); + } + fArray.reset(); +} + +SkBigPicture::SnapshotArray* SkDrawableList::newDrawableSnapshot() { + const int count = fArray.size(); + if (0 == count) { + return nullptr; + } + AutoTMalloc pics(count); + for (int i = 0; i < count; ++i) { + pics[i] = fArray[i]->newPictureSnapshot(); + } + return new SkBigPicture::SnapshotArray(pics.release(), count); +} + +void SkDrawableList::append(SkDrawable* drawable) { + *fArray.append() = SkRef(drawable); +} + +/////////////////////////////////////////////////////////////////////////////////////////////// + +static SkIRect safe_picture_bounds(const SkRect& bounds) { + SkIRect picBounds = bounds.roundOut(); + // roundOut() saturates the float edges to +/-SK_MaxS32FitsInFloat (~2billion), but this is + // large enough that width/height calculations will overflow, leading to negative dimensions. + static constexpr int32_t kSafeEdge = SK_MaxS32FitsInFloat / 2 - 1; + static constexpr SkIRect kSafeBounds = {-kSafeEdge, -kSafeEdge, kSafeEdge, kSafeEdge}; + static_assert((kSafeBounds.fRight - kSafeBounds.fLeft) >= 0 && + (kSafeBounds.fBottom - kSafeBounds.fTop) >= 0); + if (!picBounds.intersect(kSafeBounds)) { + picBounds.setEmpty(); + } + return picBounds; +} + +SkRecorder::SkRecorder(SkRecord* record, int width, int height) + : SkCanvasVirtualEnforcer(width, height) + , fApproxBytesUsedBySubPictures(0) + , fRecord(record) { + SkASSERT(this->imageInfo().width() >= 0 && this->imageInfo().height() >= 0); +} + +SkRecorder::SkRecorder(SkRecord* record, const SkRect& bounds) + : SkCanvasVirtualEnforcer(safe_picture_bounds(bounds)) + , fApproxBytesUsedBySubPictures(0) + , fRecord(record) { + SkASSERT(this->imageInfo().width() >= 0 && this->imageInfo().height() >= 0); +} + +void SkRecorder::reset(SkRecord* record, const SkRect& bounds) { + this->forgetRecord(); + fRecord = record; + this->resetCanvas(safe_picture_bounds(bounds)); + SkASSERT(this->imageInfo().width() >= 0 && this->imageInfo().height() >= 0); +} + +void SkRecorder::forgetRecord() { + fDrawableList.reset(nullptr); + fApproxBytesUsedBySubPictures = 0; + fRecord = nullptr; +} + +// To make appending to fRecord a little less verbose. +template +void SkRecorder::append(Args&&... args) { + new (fRecord->append()) T{std::forward(args)...}; +} + +// For methods which must call back into SkNoDrawCanvas. +#define INHERITED(method, ...) this->SkNoDrawCanvas::method(__VA_ARGS__) + +// Use copy() only for optional arguments, to be copied if present or skipped if not. +// (For most types we just pass by value and let copy constructors do their thing.) +template +T* SkRecorder::copy(const T* src) { + if (nullptr == src) { + return nullptr; + } + return new (fRecord->alloc()) T(*src); +} + +// This copy() is for arrays. +// It will work with POD or non-POD, though currently we only use it for POD. +template +T* SkRecorder::copy(const T src[], size_t count) { + if (nullptr == src) { + return nullptr; + } + T* dst = fRecord->alloc(count); + for (size_t i = 0; i < count; i++) { + new (dst + i) T(src[i]); + } + return dst; +} + +// Specialization for copying strings, using memcpy. +// This measured around 2x faster for copying code points, +// but I found no corresponding speedup for other arrays. +template <> +char* SkRecorder::copy(const char src[], size_t count) { + if (nullptr == src) { + return nullptr; + } + char* dst = fRecord->alloc(count); + memcpy(dst, src, count); + return dst; +} + +// As above, assuming and copying a terminating \0. +template <> +char* SkRecorder::copy(const char* src) { + return this->copy(src, strlen(src)+1); +} + +void SkRecorder::onDrawPaint(const SkPaint& paint) { + this->append(paint); +} + +void SkRecorder::onDrawBehind(const SkPaint& paint) { + this->append(paint); +} + +void SkRecorder::onDrawPoints(PointMode mode, + size_t count, + const SkPoint pts[], + const SkPaint& paint) { + this->append(paint, mode, SkToUInt(count), this->copy(pts, count)); +} + +void SkRecorder::onDrawRect(const SkRect& rect, const SkPaint& paint) { + this->append(paint, rect); +} + +void SkRecorder::onDrawRegion(const SkRegion& region, const SkPaint& paint) { + this->append(paint, region); +} + +void SkRecorder::onDrawOval(const SkRect& oval, const SkPaint& paint) { + this->append(paint, oval); +} + +void SkRecorder::onDrawArc(const SkRect& oval, SkScalar startAngle, SkScalar sweepAngle, + bool useCenter, const SkPaint& paint) { + this->append(paint, oval, startAngle, sweepAngle, useCenter); +} + +void SkRecorder::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) { + this->append(paint, rrect); +} + +void SkRecorder::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) { + this->append(paint, outer, inner); +} + +void SkRecorder::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) { + if (!fDrawableList) { + fDrawableList = std::make_unique(); + } + fDrawableList->append(drawable); + this->append(this->copy(matrix), drawable->getBounds(), fDrawableList->count() - 1); +} + +void SkRecorder::onDrawPath(const SkPath& path, const SkPaint& paint) { + this->append(paint, path); +} + +void SkRecorder::onDrawImage2(const SkImage* image, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint) { + this->append(this->copy(paint), sk_ref_sp(image), x, y, sampling); +} + +void SkRecorder::onDrawImageRect2(const SkImage* image, const SkRect& src, const SkRect& dst, + const SkSamplingOptions& sampling, const SkPaint* paint, + SrcRectConstraint constraint) { + this->append(this->copy(paint), sk_ref_sp(image), src, dst, + sampling, constraint); +} + +void SkRecorder::onDrawImageLattice2(const SkImage* image, const Lattice& lattice, const SkRect& dst, + SkFilterMode filter, const SkPaint* paint) { + int flagCount = lattice.fRectTypes ? (lattice.fXCount + 1) * (lattice.fYCount + 1) : 0; + SkASSERT(lattice.fBounds); + this->append(this->copy(paint), sk_ref_sp(image), + lattice.fXCount, this->copy(lattice.fXDivs, lattice.fXCount), + lattice.fYCount, this->copy(lattice.fYDivs, lattice.fYCount), + flagCount, this->copy(lattice.fRectTypes, flagCount), + this->copy(lattice.fColors, flagCount), *lattice.fBounds, dst, filter); +} + +void SkRecorder::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, + const SkPaint& paint) { + this->append(paint, sk_ref_sp(blob), x, y); +} + +#if defined(SK_GANESH) +void SkRecorder::onDrawSlug(const sktext::gpu::Slug* slug) { + this->append(sk_ref_sp(slug)); +} +#endif + +void SkRecorder::onDrawGlyphRunList( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) { + sk_sp blob = sk_ref_sp(glyphRunList.blob()); + if (glyphRunList.blob() == nullptr) { + blob = glyphRunList.makeBlob(); + } + + this->onDrawTextBlob(blob.get(), glyphRunList.origin().x(), glyphRunList.origin().y(), paint); +} + +void SkRecorder::onDrawPicture(const SkPicture* pic, const SkMatrix* matrix, const SkPaint* paint) { + fApproxBytesUsedBySubPictures += pic->approximateBytesUsed(); + this->append(this->copy(paint), sk_ref_sp(pic), matrix ? *matrix : SkMatrix::I()); +} + +void SkRecorder::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode bmode, + const SkPaint& paint) { + this->append(paint, + sk_ref_sp(const_cast(vertices)), + bmode); +} + +#ifdef SK_ENABLE_SKSL +void SkRecorder::onDrawMesh(const SkMesh& mesh, sk_sp blender, const SkPaint& paint) { + this->append(paint, mesh, std::move(blender)); +} +#endif + +void SkRecorder::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode bmode, + const SkPaint& paint) { + this->append(paint, + cubics ? this->copy(cubics, SkPatchUtils::kNumCtrlPts) : nullptr, + colors ? this->copy(colors, SkPatchUtils::kNumCorners) : nullptr, + texCoords ? this->copy(texCoords, SkPatchUtils::kNumCorners) : nullptr, + bmode); +} + +void SkRecorder::onDrawAtlas2(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[], + const SkColor colors[], int count, SkBlendMode mode, + const SkSamplingOptions& sampling, const SkRect* cull, + const SkPaint* paint) { + this->append(this->copy(paint), + sk_ref_sp(atlas), + this->copy(xform, count), + this->copy(tex, count), + this->copy(colors, count), + count, + mode, + sampling, + this->copy(cull)); +} + +void SkRecorder::onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) { + this->append(path, rec); +} + +void SkRecorder::onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) { + this->append(rect, SkString(key), sk_ref_sp(value)); +} + +void SkRecorder::onDrawEdgeAAQuad(const SkRect& rect, const SkPoint clip[4], + QuadAAFlags aa, const SkColor4f& color, SkBlendMode mode) { + this->append( + rect, this->copy(clip, 4), aa, color, mode); +} + +void SkRecorder::onDrawEdgeAAImageSet2(const ImageSetEntry set[], int count, + const SkPoint dstClips[], const SkMatrix preViewMatrices[], + const SkSamplingOptions& sampling, const SkPaint* paint, + SrcRectConstraint constraint) { + int totalDstClipCount, totalMatrixCount; + SkCanvasPriv::GetDstClipAndMatrixCounts(set, count, &totalDstClipCount, &totalMatrixCount); + + AutoTArray setCopy(count); + for (int i = 0; i < count; ++i) { + setCopy[i] = set[i]; + } + + this->append(this->copy(paint), std::move(setCopy), count, + this->copy(dstClips, totalDstClipCount), + this->copy(preViewMatrices, totalMatrixCount), sampling, constraint); +} + +void SkRecorder::onFlush() { + this->append(); +} + +void SkRecorder::willSave() { + this->append(); +} + +SkCanvas::SaveLayerStrategy SkRecorder::getSaveLayerStrategy(const SaveLayerRec& rec) { + this->append(this->copy(rec.fBounds) + , this->copy(rec.fPaint) + , sk_ref_sp(rec.fBackdrop) + , rec.fSaveLayerFlags + , SkCanvasPriv::GetBackdropScaleFactor(rec)); + return SkCanvas::kNoLayer_SaveLayerStrategy; +} + +bool SkRecorder::onDoSaveBehind(const SkRect* subset) { + this->append(this->copy(subset)); + return false; +} + +void SkRecorder::didRestore() { + this->append(this->getTotalMatrix()); +} + +void SkRecorder::didConcat44(const SkM44& m) { + this->append(m); +} + +void SkRecorder::didSetM44(const SkM44& m) { + this->append(m); +} + +void SkRecorder::didScale(SkScalar sx, SkScalar sy) { + this->append(sx, sy); +} + +void SkRecorder::didTranslate(SkScalar dx, SkScalar dy) { + this->append(dx, dy); +} + +void SkRecorder::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle edgeStyle) { + INHERITED(onClipRect, rect, op, edgeStyle); + SkRecords::ClipOpAndAA opAA(op, kSoft_ClipEdgeStyle == edgeStyle); + this->append(rect, opAA); +} + +void SkRecorder::onClipRRect(const SkRRect& rrect, SkClipOp op, ClipEdgeStyle edgeStyle) { + INHERITED(onClipRRect, rrect, op, edgeStyle); + SkRecords::ClipOpAndAA opAA(op, kSoft_ClipEdgeStyle == edgeStyle); + this->append(rrect, opAA); +} + +void SkRecorder::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle edgeStyle) { + INHERITED(onClipPath, path, op, edgeStyle); + SkRecords::ClipOpAndAA opAA(op, kSoft_ClipEdgeStyle == edgeStyle); + this->append(path, opAA); +} + +void SkRecorder::onClipShader(sk_sp cs, SkClipOp op) { + INHERITED(onClipShader, cs, op); + this->append(std::move(cs), op); +} + +void SkRecorder::onClipRegion(const SkRegion& deviceRgn, SkClipOp op) { + INHERITED(onClipRegion, deviceRgn, op); + this->append(deviceRgn, op); +} + +void SkRecorder::onResetClip() { + INHERITED(onResetClip); + this->append(); +} + +sk_sp SkRecorder::onNewSurface(const SkImageInfo&, const SkSurfaceProps&) { + return nullptr; +} diff --git a/gfx/skia/skia/src/core/SkRecorder.h b/gfx/skia/skia/src/core/SkRecorder.h new file mode 100644 index 0000000000..5ebab84f28 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecorder.h @@ -0,0 +1,179 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRecorder_DEFINED +#define SkRecorder_DEFINED + +#include "include/core/SkCanvasVirtualEnforcer.h" +#include "include/core/SkColor.h" +#include "include/core/SkM44.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTDArray.h" +#include "include/utils/SkNoDrawCanvas.h" +#include "src/core/SkBigPicture.h" + +#include +#include +#include + +class SkBlender; +class SkData; +class SkDrawable; +class SkImage; +class SkMatrix; +class SkMesh; +class SkPaint; +class SkPath; +class SkPicture; +class SkRRect; +class SkRecord; +class SkRegion; +class SkShader; +class SkSurface; +class SkSurfaceProps; +class SkTextBlob; +class SkVertices; +enum class SkBlendMode; +enum class SkClipOp; +struct SkDrawShadowRec; +struct SkImageInfo; +struct SkPoint; +struct SkRSXform; +struct SkRect; + +namespace sktext { + class GlyphRunList; + namespace gpu { class Slug; } +} + +class SkDrawableList : SkNoncopyable { +public: + SkDrawableList() {} + ~SkDrawableList(); + + int count() const { return fArray.size(); } + SkDrawable* const* begin() const { return fArray.begin(); } + SkDrawable* const* end() const { return fArray.end(); } + + void append(SkDrawable* drawable); + + // Return a new or ref'd array of pictures that were snapped from our drawables. + SkBigPicture::SnapshotArray* newDrawableSnapshot(); + +private: + SkTDArray fArray; +}; + +// SkRecorder provides an SkCanvas interface for recording into an SkRecord. + +class SkRecorder final : public SkCanvasVirtualEnforcer { +public: + // Does not take ownership of the SkRecord. + SkRecorder(SkRecord*, int width, int height); // TODO: remove + SkRecorder(SkRecord*, const SkRect& bounds); + + void reset(SkRecord*, const SkRect& bounds); + + size_t approxBytesUsedBySubPictures() const { return fApproxBytesUsedBySubPictures; } + + SkDrawableList* getDrawableList() const { return fDrawableList.get(); } + std::unique_ptr detachDrawableList() { return std::move(fDrawableList); } + + // Make SkRecorder forget entirely about its SkRecord*; all calls to SkRecorder will fail. + void forgetRecord(); + + void onFlush() override; + + void willSave() override; + SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override; + bool onDoSaveBehind(const SkRect*) override; + void willRestore() override {} + void didRestore() override; + + void didConcat44(const SkM44&) override; + void didSetM44(const SkM44&) override; + void didScale(SkScalar, SkScalar) override; + void didTranslate(SkScalar, SkScalar) override; + + void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override; + void onDrawDrawable(SkDrawable*, const SkMatrix*) override; + void onDrawTextBlob(const SkTextBlob* blob, + SkScalar x, + SkScalar y, + const SkPaint& paint) override; +#if defined(SK_GANESH) + void onDrawSlug(const sktext::gpu::Slug* slug) override; +#endif + void onDrawGlyphRunList( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) override; + void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], + const SkPoint texCoords[4], SkBlendMode, + const SkPaint& paint) override; + + void onDrawPaint(const SkPaint&) override; + void onDrawBehind(const SkPaint&) override; + void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override; + void onDrawRect(const SkRect&, const SkPaint&) override; + void onDrawRegion(const SkRegion&, const SkPaint&) override; + void onDrawOval(const SkRect&, const SkPaint&) override; + void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override; + void onDrawRRect(const SkRRect&, const SkPaint&) override; + void onDrawPath(const SkPath&, const SkPaint&) override; + + void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&, + const SkPaint*) override; + void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&, + const SkPaint*, SrcRectConstraint) override; + void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode, + const SkPaint*) override; + void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int, + SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override; + + void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override; +#ifdef SK_ENABLE_SKSL + void onDrawMesh(const SkMesh&, sk_sp, const SkPaint&) override; +#endif + void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override; + + void onClipRect(const SkRect& rect, SkClipOp, ClipEdgeStyle) override; + void onClipRRect(const SkRRect& rrect, SkClipOp, ClipEdgeStyle) override; + void onClipPath(const SkPath& path, SkClipOp, ClipEdgeStyle) override; + void onClipShader(sk_sp, SkClipOp) override; + void onClipRegion(const SkRegion& deviceRgn, SkClipOp) override; + void onResetClip() override; + + void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override; + + void onDrawAnnotation(const SkRect&, const char[], SkData*) override; + + void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&, + SkBlendMode) override; + void onDrawEdgeAAImageSet2(const ImageSetEntry[], int count, const SkPoint[], const SkMatrix[], + const SkSamplingOptions&, const SkPaint*, + SrcRectConstraint) override; + + sk_sp onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override; + +private: + template + T* copy(const T*); + + template + T* copy(const T[], size_t count); + + template + void append(Args&&...); + + size_t fApproxBytesUsedBySubPictures; + SkRecord* fRecord; + std::unique_ptr fDrawableList; +}; + +#endif//SkRecorder_DEFINED diff --git a/gfx/skia/skia/src/core/SkRecords.cpp b/gfx/skia/skia/src/core/SkRecords.cpp new file mode 100644 index 0000000000..29eb939ef6 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecords.cpp @@ -0,0 +1,24 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkPathPriv.h" +#include "src/core/SkRecords.h" + +namespace SkRecords { + PreCachedPath::PreCachedPath(const SkPath& path) : SkPath(path) { + this->updateBoundsCache(); + (void)this->getGenerationID(); +#if 0 // Disabled to see if we ever really race on this. It costs time, chromium:496982. + SkPathPriv::FirstDirection junk; + (void)SkPathPriv::CheapComputeFirstDirection(*this, &junk); +#endif + } + + TypedMatrix::TypedMatrix(const SkMatrix& matrix) : SkMatrix(matrix) { + (void)this->getType(); + } +} // namespace SkRecords diff --git a/gfx/skia/skia/src/core/SkRecords.h b/gfx/skia/skia/src/core/SkRecords.h new file mode 100644 index 0000000000..4234077ea8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRecords.h @@ -0,0 +1,362 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRecords_DEFINED +#define SkRecords_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkData.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkMesh.h" +#include "include/core/SkPath.h" +#include "include/core/SkPicture.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRSXform.h" +#include "include/core/SkRect.h" +#include "include/core/SkRegion.h" +#include "include/core/SkString.h" +#include "include/core/SkTextBlob.h" +#include "include/core/SkVertices.h" +#include "src/core/SkDrawShadowInfo.h" + +#if defined(SK_GANESH) +#include "include/private/chromium/Slug.h" +#endif + +namespace SkRecords { + +// A list of all the types of canvas calls we can record. +// Each of these is reified into a struct below. +// +// (We're using the macro-of-macro trick here to do several different things with the same list.) +// +// We leave this SK_RECORD_TYPES macro defined for use by code that wants to operate on SkRecords +// types polymorphically. (See SkRecord::Record::{visit,mutate} for an example.) +// +// Order doesn't technically matter here, but the compiler can generally generate better code if +// you keep them semantically grouped, especially the Draws. It's also nice to leave NoOp at 0. +#define SK_RECORD_TYPES(M) \ + M(NoOp) \ + M(Flush) \ + M(Restore) \ + M(Save) \ + M(SaveLayer) \ + M(SaveBehind) \ + M(SetMatrix) \ + M(SetM44) \ + M(Translate) \ + M(Scale) \ + M(Concat) \ + M(Concat44) \ + M(ClipPath) \ + M(ClipRRect) \ + M(ClipRect) \ + M(ClipRegion) \ + M(ClipShader) \ + M(ResetClip) \ + M(DrawArc) \ + M(DrawDrawable) \ + M(DrawImage) \ + M(DrawImageLattice) \ + M(DrawImageRect) \ + M(DrawDRRect) \ + M(DrawOval) \ + M(DrawBehind) \ + M(DrawPaint) \ + M(DrawPath) \ + M(DrawPatch) \ + M(DrawPicture) \ + M(DrawPoints) \ + M(DrawRRect) \ + M(DrawRect) \ + M(DrawRegion) \ + M(DrawTextBlob) \ + M(DrawSlug) \ + M(DrawAtlas) \ + M(DrawVertices) \ + M(DrawMesh) \ + M(DrawShadowRec) \ + M(DrawAnnotation) \ + M(DrawEdgeAAQuad) \ + M(DrawEdgeAAImageSet) + + +// Defines SkRecords::Type, an enum of all record types. +#define ENUM(T) T##_Type, +enum Type { SK_RECORD_TYPES(ENUM) }; +#undef ENUM + +#define ACT_AS_PTR(ptr) \ + operator T*() const { return ptr; } \ + T* operator->() const { return ptr; } + +// An Optional doesn't own the pointer's memory, but may need to destroy non-POD data. +template +class Optional { +public: + Optional() : fPtr(nullptr) {} + Optional(T* ptr) : fPtr(ptr) {} + Optional(Optional&& o) : fPtr(o.fPtr) { + o.fPtr = nullptr; + } + ~Optional() { if (fPtr) fPtr->~T(); } + + ACT_AS_PTR(fPtr) +private: + T* fPtr; + Optional(const Optional&) = delete; + Optional& operator=(const Optional&) = delete; +}; + +// PODArray doesn't own the pointer's memory, and we assume the data is POD. +template +class PODArray { +public: + PODArray() {} + PODArray(T* ptr) : fPtr(ptr) {} + // Default copy and assign. + + ACT_AS_PTR(fPtr) +private: + T* fPtr; +}; + +#undef ACT_AS_PTR + +// SkPath::getBounds() isn't thread safe unless we precache the bounds in a singlethreaded context. +// SkPath::cheapComputeDirection() is similar. +// Recording is a convenient time to cache these, or we can delay it to between record and playback. +struct PreCachedPath : public SkPath { + PreCachedPath() {} + PreCachedPath(const SkPath& path); +}; + +// Like SkPath::getBounds(), SkMatrix::getType() isn't thread safe unless we precache it. +// This may not cover all SkMatrices used by the picture (e.g. some could be hiding in a shader). +struct TypedMatrix : public SkMatrix { + TypedMatrix() {} + TypedMatrix(const SkMatrix& matrix); +}; + +enum Tags { + kDraw_Tag = 1, // May draw something (usually named DrawFoo). + kHasImage_Tag = 2, // Contains an SkImage or SkBitmap. + kHasText_Tag = 4, // Contains text. + kHasPaint_Tag = 8, // May have an SkPaint field, at least optionally. + + kDrawWithPaint_Tag = kDraw_Tag | kHasPaint_Tag, +}; + +// A macro to make it a little easier to define a struct that can be stored in SkRecord. +#define RECORD(T, tags, ...) \ +struct T { \ + static const Type kType = T##_Type; \ + static const int kTags = tags; \ + __VA_ARGS__; \ +}; + +RECORD(NoOp, 0) +RECORD(Flush, 0) +RECORD(Restore, 0, + TypedMatrix matrix) +RECORD(Save, 0) + +RECORD(SaveLayer, kHasPaint_Tag, + Optional bounds; + Optional paint; + sk_sp backdrop; + SkCanvas::SaveLayerFlags saveLayerFlags; + SkScalar backdropScale) + +RECORD(SaveBehind, 0, + Optional subset) + +RECORD(SetMatrix, 0, + TypedMatrix matrix) +RECORD(SetM44, 0, + SkM44 matrix) +RECORD(Concat, 0, + TypedMatrix matrix) +RECORD(Concat44, 0, + SkM44 matrix) + +RECORD(Translate, 0, + SkScalar dx; + SkScalar dy) + +RECORD(Scale, 0, + SkScalar sx; + SkScalar sy) + +struct ClipOpAndAA { + ClipOpAndAA() {} + ClipOpAndAA(SkClipOp op, bool aa) : fOp(static_cast(op)), fAA(aa) {} + + SkClipOp op() const { return static_cast(fOp); } + bool aa() const { return fAA != 0; } + +private: + unsigned fOp : 31; // This really only needs to be 3, but there's no win today to do so. + unsigned fAA : 1; // MSVC won't pack an enum with an bool, so we call this an unsigned. +}; +static_assert(sizeof(ClipOpAndAA) == 4, "ClipOpAndAASize"); + +RECORD(ClipPath, 0, + PreCachedPath path; + ClipOpAndAA opAA) +RECORD(ClipRRect, 0, + SkRRect rrect; + ClipOpAndAA opAA) +RECORD(ClipRect, 0, + SkRect rect; + ClipOpAndAA opAA) +RECORD(ClipRegion, 0, + SkRegion region; + SkClipOp op) +RECORD(ClipShader, 0, + sk_sp shader; + SkClipOp op) +RECORD(ResetClip, 0) + +// While not strictly required, if you have an SkPaint, it's fastest to put it first. +RECORD(DrawArc, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkRect oval; + SkScalar startAngle; + SkScalar sweepAngle; + unsigned useCenter) +RECORD(DrawDRRect, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkRRect outer; + SkRRect inner) +RECORD(DrawDrawable, kDraw_Tag, + Optional matrix; + SkRect worstCaseBounds; + int32_t index) +RECORD(DrawImage, kDraw_Tag|kHasImage_Tag|kHasPaint_Tag, + Optional paint; + sk_sp image; + SkScalar left; + SkScalar top; + SkSamplingOptions sampling) +RECORD(DrawImageLattice, kDraw_Tag|kHasImage_Tag|kHasPaint_Tag, + Optional paint; + sk_sp image; + int xCount; + PODArray xDivs; + int yCount; + PODArray yDivs; + int flagCount; + PODArray flags; + PODArray colors; + SkIRect src; + SkRect dst; + SkFilterMode filter) +RECORD(DrawImageRect, kDraw_Tag|kHasImage_Tag|kHasPaint_Tag, + Optional paint; + sk_sp image; + SkRect src; + SkRect dst; + SkSamplingOptions sampling; + SkCanvas::SrcRectConstraint constraint) +RECORD(DrawOval, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkRect oval) +RECORD(DrawPaint, kDraw_Tag|kHasPaint_Tag, + SkPaint paint) +RECORD(DrawBehind, kDraw_Tag|kHasPaint_Tag, + SkPaint paint) +RECORD(DrawPath, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + PreCachedPath path) +RECORD(DrawPicture, kDraw_Tag|kHasPaint_Tag, + Optional paint; + sk_sp picture; + TypedMatrix matrix) +RECORD(DrawPoints, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkCanvas::PointMode mode; + unsigned count; + PODArray pts) +RECORD(DrawRRect, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkRRect rrect) +RECORD(DrawRect, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkRect rect) +RECORD(DrawRegion, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkRegion region) +RECORD(DrawTextBlob, kDraw_Tag|kHasText_Tag|kHasPaint_Tag, + SkPaint paint; + sk_sp blob; + SkScalar x; + SkScalar y) +#if defined(SK_GANESH) +RECORD(DrawSlug, kDraw_Tag|kHasText_Tag, + sk_sp slug) +#else +RECORD(DrawSlug, 0) +#endif +RECORD(DrawPatch, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + PODArray cubics; + PODArray colors; + PODArray texCoords; + SkBlendMode bmode) +RECORD(DrawAtlas, kDraw_Tag|kHasImage_Tag|kHasPaint_Tag, + Optional paint; + sk_sp atlas; + PODArray xforms; + PODArray texs; + PODArray colors; + int count; + SkBlendMode mode; + SkSamplingOptions sampling; + Optional cull) +RECORD(DrawVertices, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + sk_sp vertices; + SkBlendMode bmode) +#ifdef SK_ENABLE_SKSL +RECORD(DrawMesh, kDraw_Tag|kHasPaint_Tag, + SkPaint paint; + SkMesh mesh; + sk_sp blender) +#else +RECORD(DrawMesh, 0) +#endif +RECORD(DrawShadowRec, kDraw_Tag, + PreCachedPath path; + SkDrawShadowRec rec) +RECORD(DrawAnnotation, 0, // TODO: kDraw_Tag, skia:5548 + SkRect rect; + SkString key; + sk_sp value) +RECORD(DrawEdgeAAQuad, kDraw_Tag, + SkRect rect; + PODArray clip; + SkCanvas::QuadAAFlags aa; + SkColor4f color; + SkBlendMode mode) +RECORD(DrawEdgeAAImageSet, kDraw_Tag|kHasImage_Tag|kHasPaint_Tag, + Optional paint; + skia_private::AutoTArray set; + int count; + PODArray dstClips; + PODArray preViewMatrices; + SkSamplingOptions sampling; + SkCanvas::SrcRectConstraint constraint) +#undef RECORD + +} // namespace SkRecords + +#endif//SkRecords_DEFINED diff --git a/gfx/skia/skia/src/core/SkRect.cpp b/gfx/skia/skia/src/core/SkRect.cpp new file mode 100644 index 0000000000..254aab27ce --- /dev/null +++ b/gfx/skia/skia/src/core/SkRect.cpp @@ -0,0 +1,309 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRect.h" + +#include "include/core/SkM44.h" +#include "include/private/base/SkDebug.h" +#include "src/core/SkRectPriv.h" + +class SkMatrix; + +bool SkIRect::intersect(const SkIRect& a, const SkIRect& b) { + SkIRect tmp = { + std::max(a.fLeft, b.fLeft), + std::max(a.fTop, b.fTop), + std::min(a.fRight, b.fRight), + std::min(a.fBottom, b.fBottom) + }; + if (tmp.isEmpty()) { + return false; + } + *this = tmp; + return true; +} + +void SkIRect::join(const SkIRect& r) { + // do nothing if the params are empty + if (r.fLeft >= r.fRight || r.fTop >= r.fBottom) { + return; + } + + // if we are empty, just assign + if (fLeft >= fRight || fTop >= fBottom) { + *this = r; + } else { + if (r.fLeft < fLeft) fLeft = r.fLeft; + if (r.fTop < fTop) fTop = r.fTop; + if (r.fRight > fRight) fRight = r.fRight; + if (r.fBottom > fBottom) fBottom = r.fBottom; + } +} + +///////////////////////////////////////////////////////////////////////////// + +void SkRect::toQuad(SkPoint quad[4]) const { + SkASSERT(quad); + + quad[0].set(fLeft, fTop); + quad[1].set(fRight, fTop); + quad[2].set(fRight, fBottom); + quad[3].set(fLeft, fBottom); +} + +#include "src/base/SkVx.h" + +bool SkRect::setBoundsCheck(const SkPoint pts[], int count) { + SkASSERT((pts && count > 0) || count == 0); + + if (count <= 0) { + this->setEmpty(); + return true; + } + + skvx::float4 min, max; + if (count & 1) { + min = max = skvx::float2::Load(pts).xyxy(); + pts += 1; + count -= 1; + } else { + min = max = skvx::float4::Load(pts); + pts += 2; + count -= 2; + } + + skvx::float4 accum = min * 0; + while (count) { + skvx::float4 xy = skvx::float4::Load(pts); + accum = accum * xy; + min = skvx::min(min, xy); + max = skvx::max(max, xy); + pts += 2; + count -= 2; + } + + const bool all_finite = all(accum * 0 == 0); + if (all_finite) { + this->setLTRB(std::min(min[0], min[2]), std::min(min[1], min[3]), + std::max(max[0], max[2]), std::max(max[1], max[3])); + } else { + this->setEmpty(); + } + return all_finite; +} + +void SkRect::setBoundsNoCheck(const SkPoint pts[], int count) { + if (!this->setBoundsCheck(pts, count)) { + this->setLTRB(SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN); + } +} + +#define CHECK_INTERSECT(al, at, ar, ab, bl, bt, br, bb) \ + SkScalar L = std::max(al, bl); \ + SkScalar R = std::min(ar, br); \ + SkScalar T = std::max(at, bt); \ + SkScalar B = std::min(ab, bb); \ + do { if (!(L < R && T < B)) return false; } while (0) + // do the !(opposite) check so we return false if either arg is NaN + +bool SkRect::intersect(const SkRect& r) { + CHECK_INTERSECT(r.fLeft, r.fTop, r.fRight, r.fBottom, fLeft, fTop, fRight, fBottom); + this->setLTRB(L, T, R, B); + return true; +} + +bool SkRect::intersect(const SkRect& a, const SkRect& b) { + CHECK_INTERSECT(a.fLeft, a.fTop, a.fRight, a.fBottom, b.fLeft, b.fTop, b.fRight, b.fBottom); + this->setLTRB(L, T, R, B); + return true; +} + +void SkRect::join(const SkRect& r) { + if (r.isEmpty()) { + return; + } + + if (this->isEmpty()) { + *this = r; + } else { + fLeft = std::min(fLeft, r.fLeft); + fTop = std::min(fTop, r.fTop); + fRight = std::max(fRight, r.fRight); + fBottom = std::max(fBottom, r.fBottom); + } +} + +//////////////////////////////////////////////////////////////////////////////////////////////// + +#include "include/core/SkString.h" +#include "src/core/SkStringUtils.h" + +static const char* set_scalar(SkString* storage, SkScalar value, SkScalarAsStringType asType) { + storage->reset(); + SkAppendScalar(storage, value, asType); + return storage->c_str(); +} + +void SkRect::dump(bool asHex) const { + SkScalarAsStringType asType = asHex ? kHex_SkScalarAsStringType : kDec_SkScalarAsStringType; + + SkString line; + if (asHex) { + SkString tmp; + line.printf( "SkRect::MakeLTRB(%s, /* %f */\n", set_scalar(&tmp, fLeft, asType), fLeft); + line.appendf(" %s, /* %f */\n", set_scalar(&tmp, fTop, asType), fTop); + line.appendf(" %s, /* %f */\n", set_scalar(&tmp, fRight, asType), fRight); + line.appendf(" %s /* %f */);", set_scalar(&tmp, fBottom, asType), fBottom); + } else { + SkString strL, strT, strR, strB; + SkAppendScalarDec(&strL, fLeft); + SkAppendScalarDec(&strT, fTop); + SkAppendScalarDec(&strR, fRight); + SkAppendScalarDec(&strB, fBottom); + line.printf("SkRect::MakeLTRB(%s, %s, %s, %s);", + strL.c_str(), strT.c_str(), strR.c_str(), strB.c_str()); + } + SkDebugf("%s\n", line.c_str()); +} + +//////////////////////////////////////////////////////////////////////////////////////////////// + +template +static bool subtract(const R& a, const R& b, R* out) { + if (a.isEmpty() || b.isEmpty() || !R::Intersects(a, b)) { + // Either already empty, or subtracting the empty rect, or there's no intersection, so + // in all cases the answer is A. + *out = a; + return true; + } + + // 4 rectangles to consider. If the edge in A is contained in B, the resulting difference can + // be represented exactly as a rectangle. Otherwise the difference is the largest subrectangle + // that is disjoint from B: + // 1. Left part of A: (A.left, A.top, B.left, A.bottom) + // 2. Right part of A: (B.right, A.top, A.right, A.bottom) + // 3. Top part of A: (A.left, A.top, A.right, B.top) + // 4. Bottom part of A: (A.left, B.bottom, A.right, A.bottom) + // + // Depending on how B intersects A, there will be 1 to 4 positive areas: + // - 4 occur when A contains B + // - 3 occur when B intersects a single edge + // - 2 occur when B intersects at a corner, or spans two opposing edges + // - 1 occurs when B spans two opposing edges and contains a 3rd, resulting in an exact rect + // - 0 occurs when B contains A, resulting in the empty rect + // + // Compute the relative areas of the 4 rects described above. Since each subrectangle shares + // either the width or height of A, we only have to divide by the other dimension, which avoids + // overflow on int32 types, and even if the float relative areas overflow to infinity, the + // comparisons work out correctly and (one of) the infinitely large subrects will be chosen. + float aHeight = (float) a.height(); + float aWidth = (float) a.width(); + float leftArea = 0.f, rightArea = 0.f, topArea = 0.f, bottomArea = 0.f; + int positiveCount = 0; + if (b.fLeft > a.fLeft) { + leftArea = (b.fLeft - a.fLeft) / aWidth; + positiveCount++; + } + if (a.fRight > b.fRight) { + rightArea = (a.fRight - b.fRight) / aWidth; + positiveCount++; + } + if (b.fTop > a.fTop) { + topArea = (b.fTop - a.fTop) / aHeight; + positiveCount++; + } + if (a.fBottom > b.fBottom) { + bottomArea = (a.fBottom - b.fBottom) / aHeight; + positiveCount++; + } + + if (positiveCount == 0) { + SkASSERT(b.contains(a)); + *out = R::MakeEmpty(); + return true; + } + + *out = a; + if (leftArea > rightArea && leftArea > topArea && leftArea > bottomArea) { + // Left chunk of A, so the new right edge is B's left edge + out->fRight = b.fLeft; + } else if (rightArea > topArea && rightArea > bottomArea) { + // Right chunk of A, so the new left edge is B's right edge + out->fLeft = b.fRight; + } else if (topArea > bottomArea) { + // Top chunk of A, so the new bottom edge is B's top edge + out->fBottom = b.fTop; + } else { + // Bottom chunk of A, so the new top edge is B's bottom edge + SkASSERT(bottomArea > 0.f); + out->fTop = b.fBottom; + } + + // If we have 1 valid area, the disjoint shape is representable as a rectangle. + SkASSERT(!R::Intersects(*out, b)); + return positiveCount == 1; +} + +bool SkRectPriv::Subtract(const SkRect& a, const SkRect& b, SkRect* out) { + return subtract(a, b, out); +} + +bool SkRectPriv::Subtract(const SkIRect& a, const SkIRect& b, SkIRect* out) { + return subtract(a, b, out); +} + + +bool SkRectPriv::QuadContainsRect(const SkMatrix& m, const SkIRect& a, const SkIRect& b) { + return QuadContainsRect(SkM44(m), SkRect::Make(a), SkRect::Make(b)); +} + +bool SkRectPriv::QuadContainsRect(const SkM44& m, const SkRect& a, const SkRect& b) { + SkDEBUGCODE(SkM44 inverse;) + SkASSERT(m.invert(&inverse)); + // With empty rectangles, the calculated edges could give surprising results. If 'a' were not + // sorted, its normals would point outside the sorted rectangle, so lots of potential rects + // would be seen as "contained". If 'a' is all 0s, its edge equations are also (0,0,0) so every + // point has a distance of 0, and would be interpreted as inside. + if (a.isEmpty()) { + return false; + } + // However, 'b' is only used to define its 4 corners to check against the transformed edges. + // This is valid regardless of b's emptiness or sortedness. + + // Calculate the 4 homogenous coordinates of 'a' transformed by 'm' where Z=0 and W=1. + auto ax = skvx::float4{a.fLeft, a.fRight, a.fRight, a.fLeft}; + auto ay = skvx::float4{a.fTop, a.fTop, a.fBottom, a.fBottom}; + + auto max = m.rc(0,0)*ax + m.rc(0,1)*ay + m.rc(0,3); + auto may = m.rc(1,0)*ax + m.rc(1,1)*ay + m.rc(1,3); + auto maw = m.rc(3,0)*ax + m.rc(3,1)*ay + m.rc(3,3); + + if (all(maw < 0.f)) { + // If all points of A are mapped to w < 0, then the edge equations end up representing the + // convex hull of projected points when A should in fact be considered empty. + return false; + } + + // Cross product of adjacent vertices provides homogenous lines for the 4 sides of the quad + auto lA = may*skvx::shuffle<1,2,3,0>(maw) - maw*skvx::shuffle<1,2,3,0>(may); + auto lB = maw*skvx::shuffle<1,2,3,0>(max) - max*skvx::shuffle<1,2,3,0>(maw); + auto lC = max*skvx::shuffle<1,2,3,0>(may) - may*skvx::shuffle<1,2,3,0>(max); + + // Before transforming, the corners of 'a' were in CW order, but afterwards they may become CCW, + // so the sign corrects the direction of the edge normals to point inwards. + float sign = (lA[0]*lB[1] - lB[0]*lA[1]) < 0 ? -1.f : 1.f; + + // Calculate distance from 'b' to each edge. Since 'b' has presumably been transformed by 'm' + // *and* projected, this assumes W = 1. + auto d0 = sign * (lA*b.fLeft + lB*b.fTop + lC); + auto d1 = sign * (lA*b.fRight + lB*b.fTop + lC); + auto d2 = sign * (lA*b.fRight + lB*b.fBottom + lC); + auto d3 = sign * (lA*b.fLeft + lB*b.fBottom + lC); + + // 'b' is contained in the mapped rectangle if all distances are >= 0 + return all((d0 >= 0.f) & (d1 >= 0.f) & (d2 >= 0.f) & (d3 >= 0.f)); +} diff --git a/gfx/skia/skia/src/core/SkRectPriv.h b/gfx/skia/skia/src/core/SkRectPriv.h new file mode 100644 index 0000000000..d4ac12461f --- /dev/null +++ b/gfx/skia/skia/src/core/SkRectPriv.h @@ -0,0 +1,99 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRectPriv_DEFINED +#define SkRectPriv_DEFINED + +#include "include/core/SkRect.h" +#include "src/base/SkMathPriv.h" + +class SkM44; +class SkMatrix; + +class SkRectPriv { +public: + // Returns an irect that is very large, and can be safely round-trip with SkRect and still + // be considered non-empty (i.e. width/height > 0) even if we round-out the SkRect. + static SkIRect MakeILarge() { + // SK_MaxS32 >> 1 seemed better, but it did not survive round-trip with SkRect and rounding. + // Also, 1 << 29 can be perfectly represented in float, while SK_MaxS32 >> 1 cannot. + const int32_t large = 1 << 29; + return { -large, -large, large, large }; + } + + static SkIRect MakeILargestInverted() { + return { SK_MaxS32, SK_MaxS32, SK_MinS32, SK_MinS32 }; + } + + static SkRect MakeLargeS32() { + SkRect r; + r.set(MakeILarge()); + return r; + } + + static SkRect MakeLargest() { + return { SK_ScalarMin, SK_ScalarMin, SK_ScalarMax, SK_ScalarMax }; + } + + static constexpr SkRect MakeLargestInverted() { + return { SK_ScalarMax, SK_ScalarMax, SK_ScalarMin, SK_ScalarMin }; + } + + static void GrowToInclude(SkRect* r, const SkPoint& pt) { + r->fLeft = std::min(pt.fX, r->fLeft); + r->fRight = std::max(pt.fX, r->fRight); + r->fTop = std::min(pt.fY, r->fTop); + r->fBottom = std::max(pt.fY, r->fBottom); + } + + // Conservative check if r can be expressed in fixed-point. + // Will return false for very large values that might have fit + static bool FitsInFixed(const SkRect& r) { + return SkFitsInFixed(r.fLeft) && SkFitsInFixed(r.fTop) && + SkFitsInFixed(r.fRight) && SkFitsInFixed(r.fBottom); + } + + static bool Is16Bit(const SkIRect& r) { + return SkTFitsIn(r.fLeft) && SkTFitsIn(r.fTop) && + SkTFitsIn(r.fRight) && SkTFitsIn(r.fBottom); + } + + // Returns r.width()/2 but divides first to avoid width() overflowing. + static SkScalar HalfWidth(const SkRect& r) { + return SkScalarHalf(r.fRight) - SkScalarHalf(r.fLeft); + } + // Returns r.height()/2 but divides first to avoid height() overflowing. + static SkScalar HalfHeight(const SkRect& r) { + return SkScalarHalf(r.fBottom) - SkScalarHalf(r.fTop); + } + + // Evaluate A-B. If the difference shape cannot be represented as a rectangle then false is + // returned and 'out' is set to the largest rectangle contained in said shape. If true is + // returned then A-B is representable as a rectangle, which is stored in 'out'. + static bool Subtract(const SkRect& a, const SkRect& b, SkRect* out); + static bool Subtract(const SkIRect& a, const SkIRect& b, SkIRect* out); + + // Evaluate A-B, and return the largest rectangle contained in that shape (since the difference + // may not be representable as rectangle). The returned rectangle will not intersect B. + static SkRect Subtract(const SkRect& a, const SkRect& b) { + SkRect diff; + Subtract(a, b, &diff); + return diff; + } + static SkIRect Subtract(const SkIRect& a, const SkIRect& b) { + SkIRect diff; + Subtract(a, b, &diff); + return diff; + } + + // Returns true if the quadrilateral formed by transforming the four corners of 'a' contains 'b' + static bool QuadContainsRect(const SkMatrix& m, const SkIRect& a, const SkIRect& b); + static bool QuadContainsRect(const SkM44& m, const SkRect& a, const SkRect& b); +}; + + +#endif diff --git a/gfx/skia/skia/src/core/SkRegion.cpp b/gfx/skia/skia/src/core/SkRegion.cpp new file mode 100644 index 0000000000..780a71c9ba --- /dev/null +++ b/gfx/skia/skia/src/core/SkRegion.cpp @@ -0,0 +1,1584 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRegion.h" + +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkRegionPriv.h" + +#include +#include + +using namespace skia_private; + +/* Region Layout + * + * TOP + * + * [ Bottom, X-Intervals, [Left, Right]..., X-Sentinel ] + * ... + * + * Y-Sentinel + */ + +///////////////////////////////////////////////////////////////////////////////////////////////// + +#define SkRegion_gEmptyRunHeadPtr ((SkRegionPriv::RunHead*)-1) +#define SkRegion_gRectRunHeadPtr nullptr + +constexpr int kRunArrayStackCount = 256; + +// This is a simple data structure which is like a SkSTArray, except that: +// - It does not initialize memory. +// - It does not distinguish between reserved space and initialized space. +// - resizeToAtLeast() instead of resize() +// - Uses sk_realloc_throw() +// - Can never be made smaller. +// Measurement: for the `region_union_16` benchmark, this is 6% faster. +class RunArray { +public: + RunArray() { fPtr = fStack; } + #ifdef SK_DEBUG + int count() const { return fCount; } + #endif + SkRegionPriv::RunType& operator[](int i) { + SkASSERT((unsigned)i < (unsigned)fCount); + return fPtr[i]; + } + /** Resize the array to a size greater-than-or-equal-to count. */ + void resizeToAtLeast(int count) { + if (count > fCount) { + // leave at least 50% extra space for future growth. + count += count >> 1; + fMalloc.realloc(count); + if (fPtr == fStack) { + memcpy(fMalloc.get(), fStack, fCount * sizeof(SkRegionPriv::RunType)); + } + fPtr = fMalloc.get(); + fCount = count; + } + } +private: + SkRegionPriv::RunType fStack[kRunArrayStackCount]; + AutoTMalloc fMalloc; + int fCount = kRunArrayStackCount; + SkRegionPriv::RunType* fPtr; // non-owning pointer +}; + +/* Pass in the beginning with the intervals. + * We back up 1 to read the interval-count. + * Return the beginning of the next scanline (i.e. the next Y-value) + */ +static SkRegionPriv::RunType* skip_intervals(const SkRegionPriv::RunType runs[]) { + int intervals = runs[-1]; +#ifdef SK_DEBUG + if (intervals > 0) { + SkASSERT(runs[0] < runs[1]); + SkASSERT(runs[1] < SkRegion_kRunTypeSentinel); + } else { + SkASSERT(0 == intervals); + SkASSERT(SkRegion_kRunTypeSentinel == runs[0]); + } +#endif + runs += intervals * 2 + 1; + return const_cast(runs); +} + +bool SkRegion::RunsAreARect(const SkRegion::RunType runs[], int count, + SkIRect* bounds) { + assert_sentinel(runs[0], false); // top + SkASSERT(count >= kRectRegionRuns); + + if (count == kRectRegionRuns) { + assert_sentinel(runs[1], false); // bottom + SkASSERT(1 == runs[2]); + assert_sentinel(runs[3], false); // left + assert_sentinel(runs[4], false); // right + assert_sentinel(runs[5], true); + assert_sentinel(runs[6], true); + + SkASSERT(runs[0] < runs[1]); // valid height + SkASSERT(runs[3] < runs[4]); // valid width + + bounds->setLTRB(runs[3], runs[0], runs[4], runs[1]); + return true; + } + return false; +} + +////////////////////////////////////////////////////////////////////////// + +SkRegion::SkRegion() { + fBounds.setEmpty(); + fRunHead = SkRegion_gEmptyRunHeadPtr; +} + +SkRegion::SkRegion(const SkRegion& src) { + fRunHead = SkRegion_gEmptyRunHeadPtr; // just need a value that won't trigger sk_free(fRunHead) + this->setRegion(src); +} + +SkRegion::SkRegion(const SkIRect& rect) { + fRunHead = SkRegion_gEmptyRunHeadPtr; // just need a value that won't trigger sk_free(fRunHead) + this->setRect(rect); +} + +SkRegion::~SkRegion() { + this->freeRuns(); +} + +void SkRegion::freeRuns() { + if (this->isComplex()) { + SkASSERT(fRunHead->fRefCnt >= 1); + if (--fRunHead->fRefCnt == 0) { + sk_free(fRunHead); + } + } +} + +void SkRegion::allocateRuns(int count, int ySpanCount, int intervalCount) { + fRunHead = RunHead::Alloc(count, ySpanCount, intervalCount); +} + +void SkRegion::allocateRuns(int count) { + fRunHead = RunHead::Alloc(count); +} + +void SkRegion::allocateRuns(const RunHead& head) { + fRunHead = RunHead::Alloc(head.fRunCount, + head.getYSpanCount(), + head.getIntervalCount()); +} + +SkRegion& SkRegion::operator=(const SkRegion& src) { + (void)this->setRegion(src); + return *this; +} + +void SkRegion::swap(SkRegion& other) { + using std::swap; + swap(fBounds, other.fBounds); + swap(fRunHead, other.fRunHead); +} + +int SkRegion::computeRegionComplexity() const { + if (this->isEmpty()) { + return 0; + } else if (this->isRect()) { + return 1; + } + return fRunHead->getIntervalCount(); +} + +bool SkRegion::setEmpty() { + this->freeRuns(); + fBounds.setEmpty(); + fRunHead = SkRegion_gEmptyRunHeadPtr; + return false; +} + +bool SkRegion::setRect(const SkIRect& r) { + if (r.isEmpty() || + SkRegion_kRunTypeSentinel == r.right() || + SkRegion_kRunTypeSentinel == r.bottom()) { + return this->setEmpty(); + } + this->freeRuns(); + fBounds = r; + fRunHead = SkRegion_gRectRunHeadPtr; + return true; +} + +bool SkRegion::setRegion(const SkRegion& src) { + if (this != &src) { + this->freeRuns(); + + fBounds = src.fBounds; + fRunHead = src.fRunHead; + if (this->isComplex()) { + fRunHead->fRefCnt++; + } + } + return fRunHead != SkRegion_gEmptyRunHeadPtr; +} + +bool SkRegion::op(const SkIRect& rect, const SkRegion& rgn, Op op) { + SkRegion tmp(rect); + + return this->op(tmp, rgn, op); +} + +bool SkRegion::op(const SkRegion& rgn, const SkIRect& rect, Op op) { + SkRegion tmp(rect); + + return this->op(rgn, tmp, op); +} + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK +#include +char* SkRegion::toString() { + Iterator iter(*this); + int count = 0; + while (!iter.done()) { + count++; + iter.next(); + } + // 4 ints, up to 10 digits each plus sign, 3 commas, '(', ')', SkRegion() and '\0' + const int max = (count*((11*4)+5))+11+1; + char* result = (char*)sk_malloc_throw(max); + if (result == nullptr) { + return nullptr; + } + count = snprintf(result, max, "SkRegion("); + iter.reset(*this); + while (!iter.done()) { + const SkIRect& r = iter.rect(); + count += snprintf(result+count, max - count, + "(%d,%d,%d,%d)", r.fLeft, r.fTop, r.fRight, r.fBottom); + iter.next(); + } + count += snprintf(result+count, max - count, ")"); + return result; +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +int SkRegion::count_runtype_values(int* itop, int* ibot) const { + int maxT; + + if (this->isRect()) { + maxT = 2; + } else { + SkASSERT(this->isComplex()); + maxT = fRunHead->getIntervalCount() * 2; + } + *itop = fBounds.fTop; + *ibot = fBounds.fBottom; + return maxT; +} + +static bool isRunCountEmpty(int count) { + return count <= 2; +} + +bool SkRegion::setRuns(RunType runs[], int count) { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + SkASSERT(count > 0); + + if (isRunCountEmpty(count)) { + // SkDEBUGF("setRuns: empty\n"); + assert_sentinel(runs[count-1], true); + return this->setEmpty(); + } + + // trim off any empty spans from the top and bottom + // weird I should need this, perhaps op() could be smarter... + if (count > kRectRegionRuns) { + RunType* stop = runs + count; + assert_sentinel(runs[0], false); // top + assert_sentinel(runs[1], false); // bottom + // runs[2] is uncomputed intervalCount + + if (runs[3] == SkRegion_kRunTypeSentinel) { // should be first left... + runs += 3; // skip empty initial span + runs[0] = runs[-2]; // set new top to prev bottom + assert_sentinel(runs[1], false); // bot: a sentinal would mean two in a row + assert_sentinel(runs[2], false); // intervalcount + assert_sentinel(runs[3], false); // left + assert_sentinel(runs[4], false); // right + } + + assert_sentinel(stop[-1], true); + assert_sentinel(stop[-2], true); + + // now check for a trailing empty span + if (stop[-5] == SkRegion_kRunTypeSentinel) { // eek, stop[-4] was a bottom with no x-runs + stop[-4] = SkRegion_kRunTypeSentinel; // kill empty last span + stop -= 3; + assert_sentinel(stop[-1], true); // last y-sentinel + assert_sentinel(stop[-2], true); // last x-sentinel + assert_sentinel(stop[-3], false); // last right + assert_sentinel(stop[-4], false); // last left + assert_sentinel(stop[-5], false); // last interval-count + assert_sentinel(stop[-6], false); // last bottom + } + count = (int)(stop - runs); + } + + SkASSERT(count >= kRectRegionRuns); + + if (SkRegion::RunsAreARect(runs, count, &fBounds)) { + return this->setRect(fBounds); + } + + // if we get here, we need to become a complex region + + if (!this->isComplex() || fRunHead->fRunCount != count) { + this->freeRuns(); + this->allocateRuns(count); + SkASSERT(this->isComplex()); + } + + // must call this before we can write directly into runs() + // in case we are sharing the buffer with another region (copy on write) + fRunHead = fRunHead->ensureWritable(); + memcpy(fRunHead->writable_runs(), runs, count * sizeof(RunType)); + fRunHead->computeRunBounds(&fBounds); + + // Our computed bounds might be too large, so we have to check here. + if (fBounds.isEmpty()) { + return this->setEmpty(); + } + + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + + return true; +} + +void SkRegion::BuildRectRuns(const SkIRect& bounds, + RunType runs[kRectRegionRuns]) { + runs[0] = bounds.fTop; + runs[1] = bounds.fBottom; + runs[2] = 1; // 1 interval for this scanline + runs[3] = bounds.fLeft; + runs[4] = bounds.fRight; + runs[5] = SkRegion_kRunTypeSentinel; + runs[6] = SkRegion_kRunTypeSentinel; +} + +bool SkRegion::contains(int32_t x, int32_t y) const { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + + if (!fBounds.contains(x, y)) { + return false; + } + if (this->isRect()) { + return true; + } + SkASSERT(this->isComplex()); + + const RunType* runs = fRunHead->findScanline(y); + + // Skip the Bottom and IntervalCount + runs += 2; + + // Just walk this scanline, checking each interval. The X-sentinel will + // appear as a left-inteval (runs[0]) and should abort the search. + // + // We could do a bsearch, using interval-count (runs[1]), but need to time + // when that would be worthwhile. + // + for (;;) { + if (x < runs[0]) { + break; + } + if (x < runs[1]) { + return true; + } + runs += 2; + } + return false; +} + +static SkRegionPriv::RunType scanline_bottom(const SkRegionPriv::RunType runs[]) { + return runs[0]; +} + +static const SkRegionPriv::RunType* scanline_next(const SkRegionPriv::RunType runs[]) { + // skip [B N [L R]... S] + return runs + 2 + runs[1] * 2 + 1; +} + +static bool scanline_contains(const SkRegionPriv::RunType runs[], + SkRegionPriv::RunType L, SkRegionPriv::RunType R) { + runs += 2; // skip Bottom and IntervalCount + for (;;) { + if (L < runs[0]) { + break; + } + if (R <= runs[1]) { + return true; + } + runs += 2; + } + return false; +} + +bool SkRegion::contains(const SkIRect& r) const { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + + if (!fBounds.contains(r)) { + return false; + } + if (this->isRect()) { + return true; + } + SkASSERT(this->isComplex()); + + const RunType* scanline = fRunHead->findScanline(r.fTop); + for (;;) { + if (!scanline_contains(scanline, r.fLeft, r.fRight)) { + return false; + } + if (r.fBottom <= scanline_bottom(scanline)) { + break; + } + scanline = scanline_next(scanline); + } + return true; +} + +bool SkRegion::contains(const SkRegion& rgn) const { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + SkDEBUGCODE(SkRegionPriv::Validate(rgn)); + + if (this->isEmpty() || rgn.isEmpty() || !fBounds.contains(rgn.fBounds)) { + return false; + } + if (this->isRect()) { + return true; + } + if (rgn.isRect()) { + return this->contains(rgn.getBounds()); + } + + /* + * A contains B is equivalent to + * B - A == 0 + */ + return !Oper(rgn, *this, kDifference_Op, nullptr); +} + +const SkRegion::RunType* SkRegion::getRuns(RunType tmpStorage[], + int* intervals) const { + SkASSERT(tmpStorage && intervals); + const RunType* runs = tmpStorage; + + if (this->isEmpty()) { + tmpStorage[0] = SkRegion_kRunTypeSentinel; + *intervals = 0; + } else if (this->isRect()) { + BuildRectRuns(fBounds, tmpStorage); + *intervals = 1; + } else { + runs = fRunHead->readonly_runs(); + *intervals = fRunHead->getIntervalCount(); + } + return runs; +} + +/////////////////////////////////////////////////////////////////////////////// + +static bool scanline_intersects(const SkRegionPriv::RunType runs[], + SkRegionPriv::RunType L, SkRegionPriv::RunType R) { + runs += 2; // skip Bottom and IntervalCount + for (;;) { + if (R <= runs[0]) { + break; + } + if (L < runs[1]) { + return true; + } + runs += 2; + } + return false; +} + +bool SkRegion::intersects(const SkIRect& r) const { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + + if (this->isEmpty() || r.isEmpty()) { + return false; + } + + SkIRect sect; + if (!sect.intersect(fBounds, r)) { + return false; + } + if (this->isRect()) { + return true; + } + SkASSERT(this->isComplex()); + + const RunType* scanline = fRunHead->findScanline(sect.fTop); + for (;;) { + if (scanline_intersects(scanline, sect.fLeft, sect.fRight)) { + return true; + } + if (sect.fBottom <= scanline_bottom(scanline)) { + break; + } + scanline = scanline_next(scanline); + } + return false; +} + +bool SkRegion::intersects(const SkRegion& rgn) const { + if (this->isEmpty() || rgn.isEmpty()) { + return false; + } + + if (!SkIRect::Intersects(fBounds, rgn.fBounds)) { + return false; + } + + bool weAreARect = this->isRect(); + bool theyAreARect = rgn.isRect(); + + if (weAreARect && theyAreARect) { + return true; + } + if (weAreARect) { + return rgn.intersects(this->getBounds()); + } + if (theyAreARect) { + return this->intersects(rgn.getBounds()); + } + + // both of us are complex + return Oper(*this, rgn, kIntersect_Op, nullptr); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkRegion::operator==(const SkRegion& b) const { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + SkDEBUGCODE(SkRegionPriv::Validate(b)); + + if (this == &b) { + return true; + } + if (fBounds != b.fBounds) { + return false; + } + + const SkRegion::RunHead* ah = fRunHead; + const SkRegion::RunHead* bh = b.fRunHead; + + // this catches empties and rects being equal + if (ah == bh) { + return true; + } + // now we insist that both are complex (but different ptrs) + if (!this->isComplex() || !b.isComplex()) { + return false; + } + return ah->fRunCount == bh->fRunCount && + !memcmp(ah->readonly_runs(), bh->readonly_runs(), + ah->fRunCount * sizeof(SkRegion::RunType)); +} + +// Return a (new) offset such that when applied (+=) to min and max, we don't overflow/underflow +static int32_t pin_offset_s32(int32_t min, int32_t max, int32_t offset) { + SkASSERT(min <= max); + const int32_t lo = -SK_MaxS32-1, + hi = +SK_MaxS32; + if ((int64_t)min + offset < lo) { offset = lo - min; } + if ((int64_t)max + offset > hi) { offset = hi - max; } + return offset; +} + +void SkRegion::translate(int dx, int dy, SkRegion* dst) const { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + + if (nullptr == dst) { + return; + } + if (this->isEmpty()) { + dst->setEmpty(); + return; + } + // pin dx and dy so we don't overflow our existing bounds + dx = pin_offset_s32(fBounds.fLeft, fBounds.fRight, dx); + dy = pin_offset_s32(fBounds.fTop, fBounds.fBottom, dy); + + if (this->isRect()) { + dst->setRect(fBounds.makeOffset(dx, dy)); + } else { + if (this == dst) { + dst->fRunHead = dst->fRunHead->ensureWritable(); + } else { + SkRegion tmp; + tmp.allocateRuns(*fRunHead); + SkASSERT(tmp.isComplex()); + tmp.fBounds = fBounds; + dst->swap(tmp); + } + + dst->fBounds.offset(dx, dy); + + const RunType* sruns = fRunHead->readonly_runs(); + RunType* druns = dst->fRunHead->writable_runs(); + + *druns++ = (SkRegion::RunType)(*sruns++ + dy); // top + for (;;) { + int bottom = *sruns++; + if (bottom == SkRegion_kRunTypeSentinel) { + break; + } + *druns++ = (SkRegion::RunType)(bottom + dy); // bottom; + *druns++ = *sruns++; // copy intervalCount; + for (;;) { + int x = *sruns++; + if (x == SkRegion_kRunTypeSentinel) { + break; + } + *druns++ = (SkRegion::RunType)(x + dx); + *druns++ = (SkRegion::RunType)(*sruns++ + dx); + } + *druns++ = SkRegion_kRunTypeSentinel; // x sentinel + } + *druns++ = SkRegion_kRunTypeSentinel; // y sentinel + + SkASSERT(sruns - fRunHead->readonly_runs() == fRunHead->fRunCount); + SkASSERT(druns - dst->fRunHead->readonly_runs() == dst->fRunHead->fRunCount); + } + + SkDEBUGCODE(SkRegionPriv::Validate(*this)); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkRegion::setRects(const SkIRect rects[], int count) { + if (0 == count) { + this->setEmpty(); + } else { + this->setRect(rects[0]); + for (int i = 1; i < count; i++) { + this->op(rects[i], kUnion_Op); + } + } + return !this->isEmpty(); +} + +/////////////////////////////////////////////////////////////////////////////// + +#if defined _WIN32 // disable warning : local variable used without having been initialized +#pragma warning ( push ) +#pragma warning ( disable : 4701 ) +#endif + +#ifdef SK_DEBUG +static void assert_valid_pair(int left, int rite) +{ + SkASSERT(left == SkRegion_kRunTypeSentinel || left < rite); +} +#else + #define assert_valid_pair(left, rite) +#endif + +struct spanRec { + const SkRegionPriv::RunType* fA_runs; + const SkRegionPriv::RunType* fB_runs; + int fA_left, fA_rite, fB_left, fB_rite; + int fLeft, fRite, fInside; + + void init(const SkRegionPriv::RunType a_runs[], + const SkRegionPriv::RunType b_runs[]) { + fA_left = *a_runs++; + fA_rite = *a_runs++; + fB_left = *b_runs++; + fB_rite = *b_runs++; + + fA_runs = a_runs; + fB_runs = b_runs; + } + + bool done() const { + SkASSERT(fA_left <= SkRegion_kRunTypeSentinel); + SkASSERT(fB_left <= SkRegion_kRunTypeSentinel); + return fA_left == SkRegion_kRunTypeSentinel && + fB_left == SkRegion_kRunTypeSentinel; + } + + void next() { + assert_valid_pair(fA_left, fA_rite); + assert_valid_pair(fB_left, fB_rite); + + int inside, left, rite SK_INIT_TO_AVOID_WARNING; + bool a_flush = false; + bool b_flush = false; + + int a_left = fA_left; + int a_rite = fA_rite; + int b_left = fB_left; + int b_rite = fB_rite; + + if (a_left < b_left) { + inside = 1; + left = a_left; + if (a_rite <= b_left) { // [...] <...> + rite = a_rite; + a_flush = true; + } else { // [...<..]...> or [...<...>...] + rite = a_left = b_left; + } + } else if (b_left < a_left) { + inside = 2; + left = b_left; + if (b_rite <= a_left) { // [...] <...> + rite = b_rite; + b_flush = true; + } else { // [...<..]...> or [...<...>...] + rite = b_left = a_left; + } + } else { // a_left == b_left + inside = 3; + left = a_left; // or b_left + if (a_rite <= b_rite) { + rite = b_left = a_rite; + a_flush = true; + } + if (b_rite <= a_rite) { + rite = a_left = b_rite; + b_flush = true; + } + } + + if (a_flush) { + a_left = *fA_runs++; + a_rite = *fA_runs++; + } + if (b_flush) { + b_left = *fB_runs++; + b_rite = *fB_runs++; + } + + SkASSERT(left <= rite); + + // now update our state + fA_left = a_left; + fA_rite = a_rite; + fB_left = b_left; + fB_rite = b_rite; + + fLeft = left; + fRite = rite; + fInside = inside; + } +}; + +static int distance_to_sentinel(const SkRegionPriv::RunType* runs) { + const SkRegionPriv::RunType* ptr = runs; + while (*ptr != SkRegion_kRunTypeSentinel) { ptr += 2; } + return ptr - runs; +} + +static int operate_on_span(const SkRegionPriv::RunType a_runs[], + const SkRegionPriv::RunType b_runs[], + RunArray* array, int dstOffset, + int min, int max) { + // This is a worst-case for this span plus two for TWO terminating sentinels. + array->resizeToAtLeast( + dstOffset + distance_to_sentinel(a_runs) + distance_to_sentinel(b_runs) + 2); + SkRegionPriv::RunType* dst = &(*array)[dstOffset]; // get pointer AFTER resizing. + + spanRec rec; + bool firstInterval = true; + + rec.init(a_runs, b_runs); + + while (!rec.done()) { + rec.next(); + + int left = rec.fLeft; + int rite = rec.fRite; + + // add left,rite to our dst buffer (checking for coincidence + if ((unsigned)(rec.fInside - min) <= (unsigned)(max - min) && + left < rite) { // skip if equal + if (firstInterval || *(dst - 1) < left) { + *dst++ = (SkRegionPriv::RunType)(left); + *dst++ = (SkRegionPriv::RunType)(rite); + firstInterval = false; + } else { + // update the right edge + *(dst - 1) = (SkRegionPriv::RunType)(rite); + } + } + } + SkASSERT(dst < &(*array)[array->count() - 1]); + *dst++ = SkRegion_kRunTypeSentinel; + return dst - &(*array)[0]; +} + +#if defined _WIN32 +#pragma warning ( pop ) +#endif + +static const struct { + uint8_t fMin; + uint8_t fMax; +} gOpMinMax[] = { + { 1, 1 }, // Difference + { 3, 3 }, // Intersection + { 1, 3 }, // Union + { 1, 2 } // XOR +}; +// need to ensure that the op enum lines up with our minmax array +static_assert(0 == SkRegion::kDifference_Op, ""); +static_assert(1 == SkRegion::kIntersect_Op, ""); +static_assert(2 == SkRegion::kUnion_Op, ""); +static_assert(3 == SkRegion::kXOR_Op, ""); + +class RgnOper { +public: + RgnOper(int top, RunArray* array, SkRegion::Op op) + : fMin(gOpMinMax[op].fMin) + , fMax(gOpMinMax[op].fMax) + , fArray(array) + , fTop((SkRegionPriv::RunType)top) // just a first guess, we might update this + { SkASSERT((unsigned)op <= 3); } + + void addSpan(int bottom, const SkRegionPriv::RunType a_runs[], + const SkRegionPriv::RunType b_runs[]) { + // skip X values and slots for the next Y+intervalCount + int start = fPrevDst + fPrevLen + 2; + // start points to beginning of dst interval + int stop = operate_on_span(a_runs, b_runs, fArray, start, fMin, fMax); + size_t len = SkToSizeT(stop - start); + SkASSERT(len >= 1 && (len & 1) == 1); + SkASSERT(SkRegion_kRunTypeSentinel == (*fArray)[stop - 1]); + + // Assert memcmp won't exceed fArray->count(). + SkASSERT(fArray->count() >= SkToInt(start + len - 1)); + if (fPrevLen == len && + (1 == len || !memcmp(&(*fArray)[fPrevDst], + &(*fArray)[start], + (len - 1) * sizeof(SkRegionPriv::RunType)))) { + // update Y value + (*fArray)[fPrevDst - 2] = (SkRegionPriv::RunType)bottom; + } else { // accept the new span + if (len == 1 && fPrevLen == 0) { + fTop = (SkRegionPriv::RunType)bottom; // just update our bottom + } else { + (*fArray)[start - 2] = (SkRegionPriv::RunType)bottom; + (*fArray)[start - 1] = SkToS32(len >> 1); + fPrevDst = start; + fPrevLen = len; + } + } + } + + int flush() { + (*fArray)[fStartDst] = fTop; + // Previously reserved enough for TWO sentinals. + SkASSERT(fArray->count() > SkToInt(fPrevDst + fPrevLen)); + (*fArray)[fPrevDst + fPrevLen] = SkRegion_kRunTypeSentinel; + return (int)(fPrevDst - fStartDst + fPrevLen + 1); + } + + bool isEmpty() const { return 0 == fPrevLen; } + + uint8_t fMin, fMax; + +private: + RunArray* fArray; + int fStartDst = 0; + int fPrevDst = 1; + size_t fPrevLen = 0; // will never match a length from operate_on_span + SkRegionPriv::RunType fTop; +}; + +// want a unique value to signal that we exited due to quickExit +#define QUICK_EXIT_TRUE_COUNT (-1) + +static int operate(const SkRegionPriv::RunType a_runs[], + const SkRegionPriv::RunType b_runs[], + RunArray* dst, + SkRegion::Op op, + bool quickExit) { + const SkRegionPriv::RunType gEmptyScanline[] = { + 0, // fake bottom value + 0, // zero intervals + SkRegion_kRunTypeSentinel, + // just need a 2nd value, since spanRec.init() reads 2 values, even + // though if the first value is the sentinel, it ignores the 2nd value. + // w/o the 2nd value here, we might read uninitialized memory. + // This happens when we are using gSentinel, which is pointing at + // our sentinel value. + 0 + }; + const SkRegionPriv::RunType* const gSentinel = &gEmptyScanline[2]; + + int a_top = *a_runs++; + int a_bot = *a_runs++; + int b_top = *b_runs++; + int b_bot = *b_runs++; + + a_runs += 1; // skip the intervalCount; + b_runs += 1; // skip the intervalCount; + + // Now a_runs and b_runs to their intervals (or sentinel) + + assert_sentinel(a_top, false); + assert_sentinel(a_bot, false); + assert_sentinel(b_top, false); + assert_sentinel(b_bot, false); + + RgnOper oper(std::min(a_top, b_top), dst, op); + + int prevBot = SkRegion_kRunTypeSentinel; // so we fail the first test + + while (a_bot < SkRegion_kRunTypeSentinel || + b_bot < SkRegion_kRunTypeSentinel) { + int top, bot SK_INIT_TO_AVOID_WARNING; + const SkRegionPriv::RunType* run0 = gSentinel; + const SkRegionPriv::RunType* run1 = gSentinel; + bool a_flush = false; + bool b_flush = false; + + if (a_top < b_top) { + top = a_top; + run0 = a_runs; + if (a_bot <= b_top) { // [...] <...> + bot = a_bot; + a_flush = true; + } else { // [...<..]...> or [...<...>...] + bot = a_top = b_top; + } + } else if (b_top < a_top) { + top = b_top; + run1 = b_runs; + if (b_bot <= a_top) { // [...] <...> + bot = b_bot; + b_flush = true; + } else { // [...<..]...> or [...<...>...] + bot = b_top = a_top; + } + } else { // a_top == b_top + top = a_top; // or b_top + run0 = a_runs; + run1 = b_runs; + if (a_bot <= b_bot) { + bot = b_top = a_bot; + a_flush = true; + } + if (b_bot <= a_bot) { + bot = a_top = b_bot; + b_flush = true; + } + } + + if (top > prevBot) { + oper.addSpan(top, gSentinel, gSentinel); + } + oper.addSpan(bot, run0, run1); + + if (quickExit && !oper.isEmpty()) { + return QUICK_EXIT_TRUE_COUNT; + } + + if (a_flush) { + a_runs = skip_intervals(a_runs); + a_top = a_bot; + a_bot = *a_runs++; + a_runs += 1; // skip uninitialized intervalCount + if (a_bot == SkRegion_kRunTypeSentinel) { + a_top = a_bot; + } + } + if (b_flush) { + b_runs = skip_intervals(b_runs); + b_top = b_bot; + b_bot = *b_runs++; + b_runs += 1; // skip uninitialized intervalCount + if (b_bot == SkRegion_kRunTypeSentinel) { + b_top = b_bot; + } + } + + prevBot = bot; + } + return oper.flush(); +} + +/////////////////////////////////////////////////////////////////////////////// + +/* Given count RunTypes in a complex region, return the worst case number of + logical intervals that represents (i.e. number of rects that would be + returned from the iterator). + + We could just return count/2, since there must be at least 2 values per + interval, but we can first trim off the const overhead of the initial TOP + value, plus the final BOTTOM + 2 sentinels. + */ +#if 0 // UNUSED +static int count_to_intervals(int count) { + SkASSERT(count >= 6); // a single rect is 6 values + return (count - 4) >> 1; +} +#endif + +static bool setEmptyCheck(SkRegion* result) { + return result ? result->setEmpty() : false; +} + +static bool setRectCheck(SkRegion* result, const SkIRect& rect) { + return result ? result->setRect(rect) : !rect.isEmpty(); +} + +static bool setRegionCheck(SkRegion* result, const SkRegion& rgn) { + return result ? result->setRegion(rgn) : !rgn.isEmpty(); +} + +bool SkRegion::Oper(const SkRegion& rgnaOrig, const SkRegion& rgnbOrig, Op op, + SkRegion* result) { + SkASSERT((unsigned)op < kOpCount); + + if (kReplace_Op == op) { + return setRegionCheck(result, rgnbOrig); + } + + // swith to using pointers, so we can swap them as needed + const SkRegion* rgna = &rgnaOrig; + const SkRegion* rgnb = &rgnbOrig; + // after this point, do not refer to rgnaOrig or rgnbOrig!!! + + // collaps difference and reverse-difference into just difference + if (kReverseDifference_Op == op) { + using std::swap; + swap(rgna, rgnb); + op = kDifference_Op; + } + + SkIRect bounds; + bool a_empty = rgna->isEmpty(); + bool b_empty = rgnb->isEmpty(); + bool a_rect = rgna->isRect(); + bool b_rect = rgnb->isRect(); + + switch (op) { + case kDifference_Op: + if (a_empty) { + return setEmptyCheck(result); + } + if (b_empty || !SkIRect::Intersects(rgna->fBounds, rgnb->fBounds)) { + return setRegionCheck(result, *rgna); + } + if (b_rect && rgnb->fBounds.containsNoEmptyCheck(rgna->fBounds)) { + return setEmptyCheck(result); + } + break; + + case kIntersect_Op: + if ((a_empty | b_empty) + || !bounds.intersect(rgna->fBounds, rgnb->fBounds)) { + return setEmptyCheck(result); + } + if (a_rect & b_rect) { + return setRectCheck(result, bounds); + } + if (a_rect && rgna->fBounds.contains(rgnb->fBounds)) { + return setRegionCheck(result, *rgnb); + } + if (b_rect && rgnb->fBounds.contains(rgna->fBounds)) { + return setRegionCheck(result, *rgna); + } + break; + + case kUnion_Op: + if (a_empty) { + return setRegionCheck(result, *rgnb); + } + if (b_empty) { + return setRegionCheck(result, *rgna); + } + if (a_rect && rgna->fBounds.contains(rgnb->fBounds)) { + return setRegionCheck(result, *rgna); + } + if (b_rect && rgnb->fBounds.contains(rgna->fBounds)) { + return setRegionCheck(result, *rgnb); + } + break; + + case kXOR_Op: + if (a_empty) { + return setRegionCheck(result, *rgnb); + } + if (b_empty) { + return setRegionCheck(result, *rgna); + } + break; + default: + SkDEBUGFAIL("unknown region op"); + return false; + } + + RunType tmpA[kRectRegionRuns]; + RunType tmpB[kRectRegionRuns]; + + int a_intervals, b_intervals; + const RunType* a_runs = rgna->getRuns(tmpA, &a_intervals); + const RunType* b_runs = rgnb->getRuns(tmpB, &b_intervals); + + RunArray array; + int count = operate(a_runs, b_runs, &array, op, nullptr == result); + SkASSERT(count <= array.count()); + + if (result) { + SkASSERT(count >= 0); + return result->setRuns(&array[0], count); + } else { + return (QUICK_EXIT_TRUE_COUNT == count) || !isRunCountEmpty(count); + } +} + +bool SkRegion::op(const SkRegion& rgna, const SkRegion& rgnb, Op op) { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + return SkRegion::Oper(rgna, rgnb, op, this); +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "src/base/SkBuffer.h" + +size_t SkRegion::writeToMemory(void* storage) const { + if (nullptr == storage) { + size_t size = sizeof(int32_t); // -1 (empty), 0 (rect), runCount + if (!this->isEmpty()) { + size += sizeof(fBounds); + if (this->isComplex()) { + size += 2 * sizeof(int32_t); // ySpanCount + intervalCount + size += fRunHead->fRunCount * sizeof(RunType); + } + } + return size; + } + + SkWBuffer buffer(storage); + + if (this->isEmpty()) { + buffer.write32(-1); + } else { + bool isRect = this->isRect(); + + buffer.write32(isRect ? 0 : fRunHead->fRunCount); + buffer.write(&fBounds, sizeof(fBounds)); + + if (!isRect) { + buffer.write32(fRunHead->getYSpanCount()); + buffer.write32(fRunHead->getIntervalCount()); + buffer.write(fRunHead->readonly_runs(), + fRunHead->fRunCount * sizeof(RunType)); + } + } + return buffer.pos(); +} + +static bool validate_run_count(int ySpanCount, int intervalCount, int runCount) { + // return 2 + 3 * ySpanCount + 2 * intervalCount; + if (ySpanCount < 1 || intervalCount < 2) { + return false; + } + SkSafeMath safeMath; + int sum = 2; + sum = safeMath.addInt(sum, ySpanCount); + sum = safeMath.addInt(sum, ySpanCount); + sum = safeMath.addInt(sum, ySpanCount); + sum = safeMath.addInt(sum, intervalCount); + sum = safeMath.addInt(sum, intervalCount); + return safeMath && sum == runCount; +} + +// Validate that a memory sequence is a valid region. +// Try to check all possible errors. +// never read beyond &runs[runCount-1]. +static bool validate_run(const int32_t* runs, + int runCount, + const SkIRect& givenBounds, + int32_t ySpanCount, + int32_t intervalCount) { + // Region Layout: + // Top ( Bottom Span_Interval_Count ( Left Right )* Sentinel )+ Sentinel + if (!validate_run_count(SkToInt(ySpanCount), SkToInt(intervalCount), runCount)) { + return false; + } + SkASSERT(runCount >= 7); // 7==SkRegion::kRectRegionRuns + // quick safety check: + if (runs[runCount - 1] != SkRegion_kRunTypeSentinel || + runs[runCount - 2] != SkRegion_kRunTypeSentinel) { + return false; + } + const int32_t* const end = runs + runCount; + SkIRect bounds = {0, 0, 0 ,0}; // calulated bounds + SkIRect rect = {0, 0, 0, 0}; // current rect + rect.fTop = *runs++; + if (rect.fTop == SkRegion_kRunTypeSentinel) { + return false; // no rect can contain SkRegion_kRunTypeSentinel + } + if (rect.fTop != givenBounds.fTop) { + return false; // Must not begin with empty span that does not contribute to bounds. + } + do { + --ySpanCount; + if (ySpanCount < 0) { + return false; // too many yspans + } + rect.fBottom = *runs++; + if (rect.fBottom == SkRegion_kRunTypeSentinel) { + return false; + } + if (rect.fBottom > givenBounds.fBottom) { + return false; // Must not end with empty span that does not contribute to bounds. + } + if (rect.fBottom <= rect.fTop) { + return false; // y-intervals must be ordered; rects must be non-empty. + } + + int32_t xIntervals = *runs++; + SkASSERT(runs < end); + if (xIntervals < 0 || xIntervals > intervalCount || runs + 1 + 2 * xIntervals > end) { + return false; + } + intervalCount -= xIntervals; + bool firstInterval = true; + int32_t lastRight = 0; // check that x-intervals are distinct and ordered. + while (xIntervals-- > 0) { + rect.fLeft = *runs++; + rect.fRight = *runs++; + if (rect.fLeft == SkRegion_kRunTypeSentinel || + rect.fRight == SkRegion_kRunTypeSentinel || + rect.fLeft >= rect.fRight || // check non-empty rect + (!firstInterval && rect.fLeft <= lastRight)) { + return false; + } + lastRight = rect.fRight; + firstInterval = false; + bounds.join(rect); + } + if (*runs++ != SkRegion_kRunTypeSentinel) { + return false; // required check sentinal. + } + rect.fTop = rect.fBottom; + SkASSERT(runs < end); + } while (*runs != SkRegion_kRunTypeSentinel); + ++runs; + if (ySpanCount != 0 || intervalCount != 0 || givenBounds != bounds) { + return false; + } + SkASSERT(runs == end); // if ySpanCount && intervalCount are right, must be correct length. + return true; +} +size_t SkRegion::readFromMemory(const void* storage, size_t length) { + SkRBuffer buffer(storage, length); + SkRegion tmp; + int32_t count; + + // Serialized Region Format: + // Empty: + // -1 + // Simple Rect: + // 0 LEFT TOP RIGHT BOTTOM + // Complex Region: + // COUNT LEFT TOP RIGHT BOTTOM Y_SPAN_COUNT TOTAL_INTERVAL_COUNT [RUNS....] + if (!buffer.readS32(&count) || count < -1) { + return 0; + } + if (count >= 0) { + if (!buffer.read(&tmp.fBounds, sizeof(tmp.fBounds)) || tmp.fBounds.isEmpty()) { + return 0; // Short buffer or bad bounds for non-empty region; report failure. + } + if (count == 0) { + tmp.fRunHead = SkRegion_gRectRunHeadPtr; + } else { + int32_t ySpanCount, intervalCount; + if (!buffer.readS32(&ySpanCount) || + !buffer.readS32(&intervalCount) || + buffer.available() < count * sizeof(int32_t)) { + return 0; + } + if (!validate_run((const int32_t*)((const char*)storage + buffer.pos()), count, + tmp.fBounds, ySpanCount, intervalCount)) { + return 0; // invalid runs, don't even allocate + } + tmp.allocateRuns(count, ySpanCount, intervalCount); + SkASSERT(tmp.isComplex()); + SkAssertResult(buffer.read(tmp.fRunHead->writable_runs(), count * sizeof(int32_t))); + } + } + SkASSERT(tmp.isValid()); + SkASSERT(buffer.isValid()); + this->swap(tmp); + return buffer.pos(); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkRegion::isValid() const { + if (this->isEmpty()) { + return fBounds == SkIRect{0, 0, 0, 0}; + } + if (fBounds.isEmpty()) { + return false; + } + if (this->isRect()) { + return true; + } + return fRunHead && fRunHead->fRefCnt > 0 && + validate_run(fRunHead->readonly_runs(), fRunHead->fRunCount, fBounds, + fRunHead->getYSpanCount(), fRunHead->getIntervalCount()); +} + +#ifdef SK_DEBUG +void SkRegionPriv::Validate(const SkRegion& rgn) { SkASSERT(rgn.isValid()); } + +void SkRegion::dump() const { + if (this->isEmpty()) { + SkDebugf(" rgn: empty\n"); + } else { + SkDebugf(" rgn: [%d %d %d %d]", fBounds.fLeft, fBounds.fTop, fBounds.fRight, fBounds.fBottom); + if (this->isComplex()) { + const RunType* runs = fRunHead->readonly_runs(); + for (int i = 0; i < fRunHead->fRunCount; i++) + SkDebugf(" %d", runs[i]); + } + SkDebugf("\n"); + } +} + +#endif + +/////////////////////////////////////////////////////////////////////////////// + +SkRegion::Iterator::Iterator(const SkRegion& rgn) { + this->reset(rgn); +} + +bool SkRegion::Iterator::rewind() { + if (fRgn) { + this->reset(*fRgn); + return true; + } + return false; +} + +void SkRegion::Iterator::reset(const SkRegion& rgn) { + fRgn = &rgn; + if (rgn.isEmpty()) { + fDone = true; + } else { + fDone = false; + if (rgn.isRect()) { + fRect = rgn.fBounds; + fRuns = nullptr; + } else { + fRuns = rgn.fRunHead->readonly_runs(); + fRect.setLTRB(fRuns[3], fRuns[0], fRuns[4], fRuns[1]); + fRuns += 5; + // Now fRuns points to the 2nd interval (or x-sentinel) + } + } +} + +void SkRegion::Iterator::next() { + if (fDone) { + return; + } + + if (fRuns == nullptr) { // rect case + fDone = true; + return; + } + + const RunType* runs = fRuns; + + if (runs[0] < SkRegion_kRunTypeSentinel) { // valid X value + fRect.fLeft = runs[0]; + fRect.fRight = runs[1]; + runs += 2; + } else { // we're at the end of a line + runs += 1; + if (runs[0] < SkRegion_kRunTypeSentinel) { // valid Y value + int intervals = runs[1]; + if (0 == intervals) { // empty line + fRect.fTop = runs[0]; + runs += 3; + } else { + fRect.fTop = fRect.fBottom; + } + + fRect.fBottom = runs[0]; + assert_sentinel(runs[2], false); + assert_sentinel(runs[3], false); + fRect.fLeft = runs[2]; + fRect.fRight = runs[3]; + runs += 4; + } else { // end of rgn + fDone = true; + } + } + fRuns = runs; +} + +SkRegion::Cliperator::Cliperator(const SkRegion& rgn, const SkIRect& clip) + : fIter(rgn), fClip(clip), fDone(true) { + const SkIRect& r = fIter.rect(); + + while (!fIter.done()) { + if (r.fTop >= clip.fBottom) { + break; + } + if (fRect.intersect(clip, r)) { + fDone = false; + break; + } + fIter.next(); + } +} + +void SkRegion::Cliperator::next() { + if (fDone) { + return; + } + + const SkIRect& r = fIter.rect(); + + fDone = true; + fIter.next(); + while (!fIter.done()) { + if (r.fTop >= fClip.fBottom) { + break; + } + if (fRect.intersect(fClip, r)) { + fDone = false; + break; + } + fIter.next(); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +SkRegion::Spanerator::Spanerator(const SkRegion& rgn, int y, int left, + int right) { + SkDEBUGCODE(SkRegionPriv::Validate(rgn)); + + const SkIRect& r = rgn.getBounds(); + + fDone = true; + if (!rgn.isEmpty() && y >= r.fTop && y < r.fBottom && + right > r.fLeft && left < r.fRight) { + if (rgn.isRect()) { + if (left < r.fLeft) { + left = r.fLeft; + } + if (right > r.fRight) { + right = r.fRight; + } + fLeft = left; + fRight = right; + fRuns = nullptr; // means we're a rect, not a rgn + fDone = false; + } else { + const SkRegion::RunType* runs = rgn.fRunHead->findScanline(y); + runs += 2; // skip Bottom and IntervalCount + for (;;) { + // runs[0..1] is to the right of the span, so we're done + if (runs[0] >= right) { + break; + } + // runs[0..1] is to the left of the span, so continue + if (runs[1] <= left) { + runs += 2; + continue; + } + // runs[0..1] intersects the span + fRuns = runs; + fLeft = left; + fRight = right; + fDone = false; + break; + } + } + } +} + +bool SkRegion::Spanerator::next(int* left, int* right) { + if (fDone) { + return false; + } + + if (fRuns == nullptr) { // we're a rect + fDone = true; // ok, now we're done + if (left) { + *left = fLeft; + } + if (right) { + *right = fRight; + } + return true; // this interval is legal + } + + const SkRegion::RunType* runs = fRuns; + + if (runs[0] >= fRight) { + fDone = true; + return false; + } + + SkASSERT(runs[1] > fLeft); + + if (left) { + *left = std::max(fLeft, runs[0]); + } + if (right) { + *right = std::min(fRight, runs[1]); + } + fRuns = runs + 2; + return true; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static void visit_pairs(int pairCount, int y, const int32_t pairs[], + const std::function& visitor) { + for (int i = 0; i < pairCount; ++i) { + visitor({ pairs[0], y, pairs[1], y + 1 }); + pairs += 2; + } +} + +void SkRegionPriv::VisitSpans(const SkRegion& rgn, + const std::function& visitor) { + if (rgn.isEmpty()) { + return; + } + if (rgn.isRect()) { + visitor(rgn.getBounds()); + } else { + const int32_t* p = rgn.fRunHead->readonly_runs(); + int32_t top = *p++; + int32_t bot = *p++; + do { + int pairCount = *p++; + if (pairCount == 1) { + visitor({ p[0], top, p[1], bot }); + p += 2; + } else if (pairCount > 1) { + // we have to loop repeated in Y, sending each interval in Y -> X order + for (int y = top; y < bot; ++y) { + visit_pairs(pairCount, y, p, visitor); + } + p += pairCount * 2; + } + assert_sentinel(*p, true); + p += 1; // skip sentinel + + // read next bottom or sentinel + top = bot; + bot = *p++; + } while (!SkRegionValueIsSentinel(bot)); + } +} + diff --git a/gfx/skia/skia/src/core/SkRegionPriv.h b/gfx/skia/skia/src/core/SkRegionPriv.h new file mode 100644 index 0000000000..2a9cb9b3ed --- /dev/null +++ b/gfx/skia/skia/src/core/SkRegionPriv.h @@ -0,0 +1,261 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRegionPriv_DEFINED +#define SkRegionPriv_DEFINED + +#include "include/core/SkRegion.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTo.h" + +#include +#include + +class SkRegionPriv { +public: + inline static constexpr int kRunTypeSentinel = 0x7FFFFFFF; + typedef SkRegion::RunType RunType; + typedef SkRegion::RunHead RunHead; + + // Call the function with each span, in Y -> X ascending order. + // We pass a rect, but we will still ensure the span Y->X ordering, so often the height + // of the rect may be 1. It should never be empty. + static void VisitSpans(const SkRegion& rgn, const std::function&); + +#ifdef SK_DEBUG + static void Validate(const SkRegion& rgn); +#endif +}; + +static constexpr int SkRegion_kRunTypeSentinel = 0x7FFFFFFF; + +inline bool SkRegionValueIsSentinel(int32_t value) { + return value == (int32_t)SkRegion_kRunTypeSentinel; +} + +#define assert_sentinel(value, isSentinel) \ + SkASSERT(SkRegionValueIsSentinel(value) == isSentinel) + +#ifdef SK_DEBUG +// Given the first interval (just past the interval-count), compute the +// interval count, by search for the x-sentinel +// +static int compute_intervalcount(const SkRegionPriv::RunType runs[]) { + const SkRegionPriv::RunType* curr = runs; + while (*curr < SkRegion_kRunTypeSentinel) { + SkASSERT(curr[0] < curr[1]); + SkASSERT(curr[1] < SkRegion_kRunTypeSentinel); + curr += 2; + } + return SkToInt((curr - runs) >> 1); +} +#endif + +struct SkRegion::RunHead { +private: + +public: + std::atomic fRefCnt; + int32_t fRunCount; + + /** + * Number of spans with different Y values. This does not count the initial + * Top value, nor does it count the final Y-Sentinel value. In the logical + * case of a rectangle, this would return 1, and an empty region would + * return 0. + */ + int getYSpanCount() const { + return fYSpanCount; + } + + /** + * Number of intervals in the entire region. This equals the number of + * rects that would be returned by the Iterator. In the logical case of + * a rect, this would return 1, and an empty region would return 0. + */ + int getIntervalCount() const { + return fIntervalCount; + } + + static RunHead* Alloc(int count) { + if (count < SkRegion::kRectRegionRuns) { + return nullptr; + } + + const int64_t size = sk_64_mul(count, sizeof(RunType)) + sizeof(RunHead); + if (count < 0 || !SkTFitsIn(size)) { SK_ABORT("Invalid Size"); } + + RunHead* head = (RunHead*)sk_malloc_throw(size); + head->fRefCnt = 1; + head->fRunCount = count; + // these must be filled in later, otherwise we will be invalid + head->fYSpanCount = 0; + head->fIntervalCount = 0; + return head; + } + + static RunHead* Alloc(int count, int yspancount, int intervalCount) { + if (yspancount <= 0 || intervalCount <= 1) { + return nullptr; + } + + RunHead* head = Alloc(count); + if (!head) { + return nullptr; + } + head->fYSpanCount = yspancount; + head->fIntervalCount = intervalCount; + return head; + } + + SkRegion::RunType* writable_runs() { + SkASSERT(fRefCnt == 1); + return (SkRegion::RunType*)(this + 1); + } + + const SkRegion::RunType* readonly_runs() const { + return (const SkRegion::RunType*)(this + 1); + } + + RunHead* ensureWritable() { + RunHead* writable = this; + if (fRefCnt > 1) { + // We need to alloc & copy the current region before decrease + // the refcount because it could be freed in the meantime. + writable = Alloc(fRunCount, fYSpanCount, fIntervalCount); + memcpy(writable->writable_runs(), this->readonly_runs(), + fRunCount * sizeof(RunType)); + + // fRefCount might have changed since we last checked. + // If we own the last reference at this point, we need to + // free the memory. + if (--fRefCnt == 0) { + sk_free(this); + } + } + return writable; + } + + /** + * Given a scanline (including its Bottom value at runs[0]), return the next + * scanline. Asserts that there is one (i.e. runs[0] < Sentinel) + */ + static SkRegion::RunType* SkipEntireScanline(const SkRegion::RunType runs[]) { + // we are not the Y Sentinel + SkASSERT(runs[0] < SkRegion_kRunTypeSentinel); + + const int intervals = runs[1]; + SkASSERT(runs[2 + intervals * 2] == SkRegion_kRunTypeSentinel); +#ifdef SK_DEBUG + { + int n = compute_intervalcount(&runs[2]); + SkASSERT(n == intervals); + } +#endif + + // skip the entire line [B N [L R] S] + runs += 1 + 1 + intervals * 2 + 1; + return const_cast(runs); + } + + + /** + * Return the scanline that contains the Y value. This requires that the Y + * value is already known to be contained within the bounds of the region, + * and so this routine never returns nullptr. + * + * It returns the beginning of the scanline, starting with its Bottom value. + */ + SkRegion::RunType* findScanline(int y) const { + const RunType* runs = this->readonly_runs(); + + // if the top-check fails, we didn't do a quick check on the bounds + SkASSERT(y >= runs[0]); + + runs += 1; // skip top-Y + for (;;) { + int bottom = runs[0]; + // If we hit this, we've walked off the region, and our bounds check + // failed. + SkASSERT(bottom < SkRegion_kRunTypeSentinel); + if (y < bottom) { + break; + } + runs = SkipEntireScanline(runs); + } + return const_cast(runs); + } + + // Copy src runs into us, computing interval counts and bounds along the way + void computeRunBounds(SkIRect* bounds) { + RunType* runs = this->writable_runs(); + bounds->fTop = *runs++; + + int bot; + int ySpanCount = 0; + int intervalCount = 0; + int left = SK_MaxS32; + int rite = SK_MinS32; + + do { + bot = *runs++; + SkASSERT(bot < SkRegion_kRunTypeSentinel); + ySpanCount += 1; + + const int intervals = *runs++; + SkASSERT(intervals >= 0); + SkASSERT(intervals < SkRegion_kRunTypeSentinel); + + if (intervals > 0) { +#ifdef SK_DEBUG + { + int n = compute_intervalcount(runs); + SkASSERT(n == intervals); + } +#endif + RunType L = runs[0]; + SkASSERT(L < SkRegion_kRunTypeSentinel); + if (left > L) { + left = L; + } + + runs += intervals * 2; + RunType R = runs[-1]; + SkASSERT(R < SkRegion_kRunTypeSentinel); + if (rite < R) { + rite = R; + } + + intervalCount += intervals; + } + SkASSERT(SkRegion_kRunTypeSentinel == *runs); + runs += 1; // skip x-sentinel + + // test Y-sentinel + } while (SkRegion_kRunTypeSentinel > *runs); + +#ifdef SK_DEBUG + // +1 to skip the last Y-sentinel + int runCount = SkToInt(runs - this->writable_runs() + 1); + SkASSERT(runCount == fRunCount); +#endif + + fYSpanCount = ySpanCount; + fIntervalCount = intervalCount; + + bounds->fLeft = left; + bounds->fRight = rite; + bounds->fBottom = bot; + } + +private: + int32_t fYSpanCount; + int32_t fIntervalCount; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkRegion_path.cpp b/gfx/skia/skia/src/core/SkRegion_path.cpp new file mode 100644 index 0000000000..4c14b3e811 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRegion_path.cpp @@ -0,0 +1,586 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" +#include "src/base/SkTSort.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkRegionPriv.h" +#include "src/core/SkScan.h" + +// The rgnbuilder caller *seems* to pass short counts, possible often seens early failure, so +// we may not want to promote this to a "std" routine just yet. +static bool sk_memeq32(const int32_t* SK_RESTRICT a, const int32_t* SK_RESTRICT b, int count) { + for (int i = 0; i < count; ++i) { + if (a[i] != b[i]) { + return false; + } + } + return true; +} + +class SkRgnBuilder : public SkBlitter { +public: + SkRgnBuilder(); + ~SkRgnBuilder() override; + + // returns true if it could allocate the working storage needed + bool init(int maxHeight, int maxTransitions, bool pathIsInverse); + + void done() { + if (fCurrScanline != nullptr) { + fCurrScanline->fXCount = (SkRegion::RunType)((int)(fCurrXPtr - fCurrScanline->firstX())); + if (!this->collapsWithPrev()) { // flush the last line + fCurrScanline = fCurrScanline->nextScanline(); + } + } + } + + int computeRunCount() const; + void copyToRect(SkIRect*) const; + void copyToRgn(SkRegion::RunType runs[]) const; + + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override { + SkDEBUGFAIL("blitAntiH not implemented"); + } + +#ifdef SK_DEBUG + void dump() const { + SkDebugf("SkRgnBuilder: Top = %d\n", fTop); + const Scanline* line = (Scanline*)fStorage; + while (line < fCurrScanline) { + SkDebugf("SkRgnBuilder::Scanline: LastY=%d, fXCount=%d", line->fLastY, line->fXCount); + for (int i = 0; i < line->fXCount; i++) { + SkDebugf(" %d", line->firstX()[i]); + } + SkDebugf("\n"); + + line = line->nextScanline(); + } + } +#endif +private: + /* + * Scanline mimics a row in the region, nearly. A row in a region is: + * [Bottom IntervalCount [L R]... Sentinel] + * while a Scanline is + * [LastY XCount [L R]... uninitialized] + * The two are the same length (which is good), but we have to transmute + * the scanline a little when we convert it to a region-row. + * + * Potentially we could recode this to exactly match the row format, in + * which case copyToRgn() could be a single memcpy. Not sure that is worth + * the effort. + */ + struct Scanline { + SkRegion::RunType fLastY; + SkRegion::RunType fXCount; + + SkRegion::RunType* firstX() const { return (SkRegion::RunType*)(this + 1); } + Scanline* nextScanline() const { + // add final +1 for the x-sentinel + return (Scanline*)((SkRegion::RunType*)(this + 1) + fXCount + 1); + } + }; + SkRegion::RunType* fStorage; + Scanline* fCurrScanline; + Scanline* fPrevScanline; + // points at next avialable x[] in fCurrScanline + SkRegion::RunType* fCurrXPtr; + SkRegion::RunType fTop; // first Y value + + int fStorageCount; + + bool collapsWithPrev() { + if (fPrevScanline != nullptr && + fPrevScanline->fLastY + 1 == fCurrScanline->fLastY && + fPrevScanline->fXCount == fCurrScanline->fXCount && + sk_memeq32(fPrevScanline->firstX(), fCurrScanline->firstX(), fCurrScanline->fXCount)) + { + // update the height of fPrevScanline + fPrevScanline->fLastY = fCurrScanline->fLastY; + return true; + } + return false; + } +}; + +SkRgnBuilder::SkRgnBuilder() + : fStorage(nullptr) { +} + +SkRgnBuilder::~SkRgnBuilder() { + sk_free(fStorage); +} + +bool SkRgnBuilder::init(int maxHeight, int maxTransitions, bool pathIsInverse) { + if ((maxHeight | maxTransitions) < 0) { + return false; + } + + SkSafeMath safe; + + if (pathIsInverse) { + // allow for additional X transitions to "invert" each scanline + // [ L' ... normal transitions ... R' ] + // + maxTransitions = safe.addInt(maxTransitions, 2); + } + + // compute the count with +1 and +3 slop for the working buffer + size_t count = safe.mul(safe.addInt(maxHeight, 1), safe.addInt(3, maxTransitions)); + + if (pathIsInverse) { + // allow for two "empty" rows for the top and bottom + // [ Y, 1, L, R, S] == 5 (*2 for top and bottom) + count = safe.add(count, 10); + } + + if (!safe || !SkTFitsIn(count)) { + return false; + } + fStorageCount = SkToS32(count); + + fStorage = (SkRegion::RunType*)sk_malloc_canfail(fStorageCount, sizeof(SkRegion::RunType)); + if (nullptr == fStorage) { + return false; + } + + fCurrScanline = nullptr; // signal empty collection + fPrevScanline = nullptr; // signal first scanline + return true; +} + +void SkRgnBuilder::blitH(int x, int y, int width) { + if (fCurrScanline == nullptr) { // first time + fTop = (SkRegion::RunType)(y); + fCurrScanline = (Scanline*)fStorage; + fCurrScanline->fLastY = (SkRegion::RunType)(y); + fCurrXPtr = fCurrScanline->firstX(); + } else { + SkASSERT(y >= fCurrScanline->fLastY); + + if (y > fCurrScanline->fLastY) { + // if we get here, we're done with fCurrScanline + fCurrScanline->fXCount = (SkRegion::RunType)((int)(fCurrXPtr - fCurrScanline->firstX())); + + int prevLastY = fCurrScanline->fLastY; + if (!this->collapsWithPrev()) { + fPrevScanline = fCurrScanline; + fCurrScanline = fCurrScanline->nextScanline(); + + } + if (y - 1 > prevLastY) { // insert empty run + fCurrScanline->fLastY = (SkRegion::RunType)(y - 1); + fCurrScanline->fXCount = 0; + fCurrScanline = fCurrScanline->nextScanline(); + } + // setup for the new curr line + fCurrScanline->fLastY = (SkRegion::RunType)(y); + fCurrXPtr = fCurrScanline->firstX(); + } + } + // check if we should extend the current run, or add a new one + if (fCurrXPtr > fCurrScanline->firstX() && fCurrXPtr[-1] == x) { + fCurrXPtr[-1] = (SkRegion::RunType)(x + width); + } else { + fCurrXPtr[0] = (SkRegion::RunType)(x); + fCurrXPtr[1] = (SkRegion::RunType)(x + width); + fCurrXPtr += 2; + } + SkASSERT(fCurrXPtr - fStorage < fStorageCount); +} + +int SkRgnBuilder::computeRunCount() const { + if (fCurrScanline == nullptr) { + return 0; + } + + const SkRegion::RunType* line = fStorage; + const SkRegion::RunType* stop = (const SkRegion::RunType*)fCurrScanline; + + return 2 + (int)(stop - line); +} + +void SkRgnBuilder::copyToRect(SkIRect* r) const { + SkASSERT(fCurrScanline != nullptr); + // A rect's scanline is [bottom intervals left right sentinel] == 5 + SkASSERT((const SkRegion::RunType*)fCurrScanline - fStorage == 5); + + const Scanline* line = (const Scanline*)fStorage; + SkASSERT(line->fXCount == 2); + + r->setLTRB(line->firstX()[0], fTop, line->firstX()[1], line->fLastY + 1); +} + +void SkRgnBuilder::copyToRgn(SkRegion::RunType runs[]) const { + SkASSERT(fCurrScanline != nullptr); + SkASSERT((const SkRegion::RunType*)fCurrScanline - fStorage > 4); + + const Scanline* line = (const Scanline*)fStorage; + const Scanline* stop = fCurrScanline; + + *runs++ = fTop; + do { + *runs++ = (SkRegion::RunType)(line->fLastY + 1); + int count = line->fXCount; + *runs++ = count >> 1; // intervalCount + if (count) { + memcpy(runs, line->firstX(), count * sizeof(SkRegion::RunType)); + runs += count; + } + *runs++ = SkRegion_kRunTypeSentinel; + line = line->nextScanline(); + } while (line < stop); + SkASSERT(line == stop); + *runs = SkRegion_kRunTypeSentinel; +} + +static unsigned verb_to_initial_last_index(unsigned verb) { + static const uint8_t gPathVerbToInitialLastIndex[] = { + 0, // kMove_Verb + 1, // kLine_Verb + 2, // kQuad_Verb + 2, // kConic_Verb + 3, // kCubic_Verb + 0, // kClose_Verb + 0 // kDone_Verb + }; + SkASSERT((unsigned)verb < std::size(gPathVerbToInitialLastIndex)); + return gPathVerbToInitialLastIndex[verb]; +} + +static unsigned verb_to_max_edges(unsigned verb) { + static const uint8_t gPathVerbToMaxEdges[] = { + 0, // kMove_Verb + 1, // kLine_Verb + 2, // kQuad_VerbB + 2, // kConic_VerbB + 3, // kCubic_Verb + 0, // kClose_Verb + 0 // kDone_Verb + }; + SkASSERT((unsigned)verb < std::size(gPathVerbToMaxEdges)); + return gPathVerbToMaxEdges[verb]; +} + +// If returns 0, ignore itop and ibot +static int count_path_runtype_values(const SkPath& path, int* itop, int* ibot) { + SkPath::Iter iter(path, true); + SkPoint pts[4]; + SkPath::Verb verb; + + int maxEdges = 0; + SkScalar top = SkIntToScalar(SK_MaxS16); + SkScalar bot = SkIntToScalar(SK_MinS16); + + while ((verb = iter.next(pts)) != SkPath::kDone_Verb) { + maxEdges += verb_to_max_edges(verb); + + int lastIndex = verb_to_initial_last_index(verb); + if (lastIndex > 0) { + for (int i = 1; i <= lastIndex; i++) { + if (top > pts[i].fY) { + top = pts[i].fY; + } else if (bot < pts[i].fY) { + bot = pts[i].fY; + } + } + } else if (SkPath::kMove_Verb == verb) { + if (top > pts[0].fY) { + top = pts[0].fY; + } else if (bot < pts[0].fY) { + bot = pts[0].fY; + } + } + } + if (0 == maxEdges) { + return 0; // we have only moves+closes + } + + SkASSERT(top <= bot); + *itop = SkScalarRoundToInt(top); + *ibot = SkScalarRoundToInt(bot); + return maxEdges; +} + +static bool check_inverse_on_empty_return(SkRegion* dst, const SkPath& path, const SkRegion& clip) { + if (path.isInverseFillType()) { + return dst->set(clip); + } else { + return dst->setEmpty(); + } +} + +bool SkRegion::setPath(const SkPath& path, const SkRegion& clip) { + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + + if (clip.isEmpty() || !path.isFinite() || path.isEmpty()) { + // This treats non-finite paths as empty as well, so this returns empty or 'clip' if + // it's inverse-filled. If clip is also empty, path's fill type doesn't really matter + // and this region ends up empty. + return check_inverse_on_empty_return(this, path, clip); + } + + // Our builder is very fragile, and can't be called with spans/rects out of Y->X order. + // To ensure this, we only "fill" clipped to a rect (the clip's bounds), and if the + // clip is more complex than that, we just post-intersect the result with the clip. + const SkIRect clipBounds = clip.getBounds(); + if (clip.isComplex()) { + if (!this->setPath(path, SkRegion(clipBounds))) { + return false; + } + return this->op(clip, kIntersect_Op); + } + + // SkScan::FillPath has limits on the coordinate range of the clipping SkRegion. If it's too + // big, tile the clip bounds and union the pieces back together. + if (SkScan::PathRequiresTiling(clipBounds)) { + static constexpr int kTileSize = 32767 >> 1; // Limit so coords can fit into SkFixed (16.16) + const SkIRect pathBounds = path.getBounds().roundOut(); + + this->setEmpty(); + + // Note: With large integers some intermediate calculations can overflow, but the + // end results will still be in integer range. Using int64_t for the intermediate + // values will handle this situation. + for (int64_t top = clipBounds.fTop; top < clipBounds.fBottom; top += kTileSize) { + int64_t bot = std::min(top + kTileSize, (int64_t)clipBounds.fBottom); + for (int64_t left = clipBounds.fLeft; left < clipBounds.fRight; left += kTileSize) { + int64_t right = std::min(left + kTileSize, (int64_t)clipBounds.fRight); + + SkIRect tileClipBounds = {(int)left, (int)top, (int)right, (int)bot}; + if (!SkIRect::Intersects(pathBounds, tileClipBounds)) { + continue; + } + + // Shift coordinates so the top left is (0,0) during scan conversion and then + // translate the SkRegion afterwards. + tileClipBounds.offset(-left, -top); + SkASSERT(!SkScan::PathRequiresTiling(tileClipBounds)); + SkRegion tile; + tile.setPath(path.makeTransform(SkMatrix::Translate(-left, -top)), + SkRegion(tileClipBounds)); + tile.translate(left, top); + this->op(tile, kUnion_Op); + } + } + // During tiling we only applied the bounds of the tile, now that we have a full SkRegion, + // apply the original clip. + return this->op(clip, kIntersect_Op); + } + + // compute worst-case rgn-size for the path + int pathTop, pathBot; + int pathTransitions = count_path_runtype_values(path, &pathTop, &pathBot); + if (0 == pathTransitions) { + return check_inverse_on_empty_return(this, path, clip); + } + + int clipTop, clipBot; + int clipTransitions = clip.count_runtype_values(&clipTop, &clipBot); + + int top = std::max(pathTop, clipTop); + int bot = std::min(pathBot, clipBot); + if (top >= bot) { + return check_inverse_on_empty_return(this, path, clip); + } + + SkRgnBuilder builder; + + if (!builder.init(bot - top, + std::max(pathTransitions, clipTransitions), + path.isInverseFillType())) { + // can't allocate working space, so return false + return this->setEmpty(); + } + + SkScan::FillPath(path, clip, &builder); + builder.done(); + + int count = builder.computeRunCount(); + if (count == 0) { + return this->setEmpty(); + } else if (count == kRectRegionRuns) { + builder.copyToRect(&fBounds); + this->setRect(fBounds); + } else { + SkRegion tmp; + + tmp.fRunHead = RunHead::Alloc(count); + builder.copyToRgn(tmp.fRunHead->writable_runs()); + tmp.fRunHead->computeRunBounds(&tmp.fBounds); + this->swap(tmp); + } + SkDEBUGCODE(SkRegionPriv::Validate(*this)); + return true; +} + +///////////////////////////////////////////////////////////////////////////////////////////////// +///////////////////////////////////////////////////////////////////////////////////////////////// + +struct Edge { + enum { + kY0Link = 0x01, + kY1Link = 0x02, + + kCompleteLink = (kY0Link | kY1Link) + }; + + SkRegionPriv::RunType fX; + SkRegionPriv::RunType fY0, fY1; + uint8_t fFlags; + Edge* fNext; + + void set(int x, int y0, int y1) { + SkASSERT(y0 != y1); + + fX = (SkRegionPriv::RunType)(x); + fY0 = (SkRegionPriv::RunType)(y0); + fY1 = (SkRegionPriv::RunType)(y1); + fFlags = 0; + SkDEBUGCODE(fNext = nullptr;) + } + + int top() const { + return std::min(fY0, fY1); + } +}; + +static void find_link(Edge* base, Edge* stop) { + SkASSERT(base < stop); + + if (base->fFlags == Edge::kCompleteLink) { + SkASSERT(base->fNext); + return; + } + + SkASSERT(base + 1 < stop); + + int y0 = base->fY0; + int y1 = base->fY1; + + Edge* e = base; + if ((base->fFlags & Edge::kY0Link) == 0) { + for (;;) { + e += 1; + if ((e->fFlags & Edge::kY1Link) == 0 && y0 == e->fY1) { + SkASSERT(nullptr == e->fNext); + e->fNext = base; + e->fFlags = SkToU8(e->fFlags | Edge::kY1Link); + break; + } + } + } + + e = base; + if ((base->fFlags & Edge::kY1Link) == 0) { + for (;;) { + e += 1; + if ((e->fFlags & Edge::kY0Link) == 0 && y1 == e->fY0) { + SkASSERT(nullptr == base->fNext); + base->fNext = e; + e->fFlags = SkToU8(e->fFlags | Edge::kY0Link); + break; + } + } + } + + base->fFlags = Edge::kCompleteLink; +} + +static int extract_path(Edge* edge, Edge* stop, SkPath* path) { + while (0 == edge->fFlags) { + edge++; // skip over "used" edges + } + + SkASSERT(edge < stop); + + Edge* base = edge; + Edge* prev = edge; + edge = edge->fNext; + SkASSERT(edge != base); + + int count = 1; + path->moveTo(SkIntToScalar(prev->fX), SkIntToScalar(prev->fY0)); + prev->fFlags = 0; + do { + if (prev->fX != edge->fX || prev->fY1 != edge->fY0) { // skip collinear + path->lineTo(SkIntToScalar(prev->fX), SkIntToScalar(prev->fY1)); // V + path->lineTo(SkIntToScalar(edge->fX), SkIntToScalar(edge->fY0)); // H + } + prev = edge; + edge = edge->fNext; + count += 1; + prev->fFlags = 0; + } while (edge != base); + path->lineTo(SkIntToScalar(prev->fX), SkIntToScalar(prev->fY1)); // V + path->close(); + return count; +} + +struct EdgeLT { + bool operator()(const Edge& a, const Edge& b) const { + return (a.fX == b.fX) ? a.top() < b.top() : a.fX < b.fX; + } +}; + +bool SkRegion::getBoundaryPath(SkPath* path) const { + // path could safely be nullptr if we're empty, but the caller shouldn't + // *know* that + SkASSERT(path); + + if (this->isEmpty()) { + return false; + } + + const SkIRect& bounds = this->getBounds(); + + if (this->isRect()) { + SkRect r; + r.set(bounds); // this converts the ints to scalars + path->addRect(r); + return true; + } + + SkRegion::Iterator iter(*this); + SkTDArray edges; + + for (const SkIRect& r = iter.rect(); !iter.done(); iter.next()) { + Edge* edge = edges.append(2); + edge[0].set(r.fLeft, r.fBottom, r.fTop); + edge[1].set(r.fRight, r.fTop, r.fBottom); + } + + int count = edges.size(); + Edge* start = edges.begin(); + Edge* stop = start + count; + SkTQSort(start, stop, EdgeLT()); + + Edge* e; + for (e = start; e != stop; e++) { + find_link(e, stop); + } + +#ifdef SK_DEBUG + for (e = start; e != stop; e++) { + SkASSERT(e->fNext != nullptr); + SkASSERT(e->fFlags == Edge::kCompleteLink); + } +#endif + + path->incReserve(count << 1); + do { + SkASSERT(count > 1); + count -= extract_path(start, stop, path); + } while (count > 0); + + return true; +} diff --git a/gfx/skia/skia/src/core/SkResourceCache.cpp b/gfx/skia/skia/src/core/SkResourceCache.cpp new file mode 100644 index 0000000000..2c864f74ae --- /dev/null +++ b/gfx/skia/skia/src/core/SkResourceCache.cpp @@ -0,0 +1,614 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkResourceCache.h" + +#include "include/core/SkTraceMemoryDump.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTo.h" +#include "include/private/chromium/SkDiscardableMemory.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkMessageBus.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkOpts.h" + +#include +#include + +using namespace skia_private; + +DECLARE_SKMESSAGEBUS_MESSAGE(SkResourceCache::PurgeSharedIDMessage, uint32_t, true) + +static inline bool SkShouldPostMessageToBus( + const SkResourceCache::PurgeSharedIDMessage&, uint32_t) { + // SkResourceCache is typically used as a singleton and we don't label Inboxes so all messages + // go to all inboxes. + return true; +} + +// This can be defined by the caller's build system +//#define SK_USE_DISCARDABLE_SCALEDIMAGECACHE + +#ifndef SK_DISCARDABLEMEMORY_SCALEDIMAGECACHE_COUNT_LIMIT +# define SK_DISCARDABLEMEMORY_SCALEDIMAGECACHE_COUNT_LIMIT 1024 +#endif + +#ifndef SK_DEFAULT_IMAGE_CACHE_LIMIT + #define SK_DEFAULT_IMAGE_CACHE_LIMIT (32 * 1024 * 1024) +#endif + +void SkResourceCache::Key::init(void* nameSpace, uint64_t sharedID, size_t dataSize) { + SkASSERT(SkAlign4(dataSize) == dataSize); + + // fCount32 and fHash are not hashed + static const int kUnhashedLocal32s = 2; // fCache32 + fHash + static const int kSharedIDLocal32s = 2; // fSharedID_lo + fSharedID_hi + static const int kHashedLocal32s = kSharedIDLocal32s + (sizeof(fNamespace) >> 2); + static const int kLocal32s = kUnhashedLocal32s + kHashedLocal32s; + + static_assert(sizeof(Key) == (kLocal32s << 2), "unaccounted_key_locals"); + static_assert(sizeof(Key) == offsetof(Key, fNamespace) + sizeof(fNamespace), + "namespace_field_must_be_last"); + + fCount32 = SkToS32(kLocal32s + (dataSize >> 2)); + fSharedID_lo = (uint32_t)(sharedID & 0xFFFFFFFF); + fSharedID_hi = (uint32_t)(sharedID >> 32); + fNamespace = nameSpace; + // skip unhashed fields when computing the hash + fHash = SkOpts::hash(this->as32() + kUnhashedLocal32s, + (fCount32 - kUnhashedLocal32s) << 2); +} + +#include "src/core/SkTHash.h" + +namespace { + struct HashTraits { + static uint32_t Hash(const SkResourceCache::Key& key) { return key.hash(); } + static const SkResourceCache::Key& GetKey(const SkResourceCache::Rec* rec) { + return rec->getKey(); + } + }; +} // namespace + +class SkResourceCache::Hash : + public SkTHashTable {}; + + +/////////////////////////////////////////////////////////////////////////////// + +void SkResourceCache::init() { + fHead = nullptr; + fTail = nullptr; + fHash = new Hash; + fTotalBytesUsed = 0; + fCount = 0; + fSingleAllocationByteLimit = 0; + + // One of these should be explicit set by the caller after we return. + fTotalByteLimit = 0; + fDiscardableFactory = nullptr; +} + +SkResourceCache::SkResourceCache(DiscardableFactory factory) + : fPurgeSharedIDInbox(SK_InvalidUniqueID) { + this->init(); + fDiscardableFactory = factory; +} + +SkResourceCache::SkResourceCache(size_t byteLimit) + : fPurgeSharedIDInbox(SK_InvalidUniqueID) { + this->init(); + fTotalByteLimit = byteLimit; +} + +SkResourceCache::~SkResourceCache() { + Rec* rec = fHead; + while (rec) { + Rec* next = rec->fNext; + delete rec; + rec = next; + } + delete fHash; +} + +//////////////////////////////////////////////////////////////////////////////// + +bool SkResourceCache::find(const Key& key, FindVisitor visitor, void* context) { + this->checkMessages(); + + if (auto found = fHash->find(key)) { + Rec* rec = *found; + if (visitor(*rec, context)) { + this->moveToHead(rec); // for our LRU + return true; + } else { + this->remove(rec); // stale + return false; + } + } + return false; +} + +static void make_size_str(size_t size, SkString* str) { + const char suffix[] = { 'b', 'k', 'm', 'g', 't', 0 }; + int i = 0; + while (suffix[i] && (size > 1024)) { + i += 1; + size >>= 10; + } + str->printf("%zu%c", size, suffix[i]); +} + +static bool gDumpCacheTransactions; + +void SkResourceCache::add(Rec* rec, void* payload) { + this->checkMessages(); + + SkASSERT(rec); + // See if we already have this key (racy inserts, etc.) + if (Rec** preexisting = fHash->find(rec->getKey())) { + Rec* prev = *preexisting; + if (prev->canBePurged()) { + // if it can be purged, the install may fail, so we have to remove it + this->remove(prev); + } else { + // if it cannot be purged, we reuse it and delete the new one + prev->postAddInstall(payload); + delete rec; + return; + } + } + + this->addToHead(rec); + fHash->set(rec); + rec->postAddInstall(payload); + + if (gDumpCacheTransactions) { + SkString bytesStr, totalStr; + make_size_str(rec->bytesUsed(), &bytesStr); + make_size_str(fTotalBytesUsed, &totalStr); + SkDebugf("RC: add %5s %12p key %08x -- total %5s, count %d\n", + bytesStr.c_str(), rec, rec->getHash(), totalStr.c_str(), fCount); + } + + // since the new rec may push us over-budget, we perform a purge check now + this->purgeAsNeeded(); +} + +void SkResourceCache::remove(Rec* rec) { + SkASSERT(rec->canBePurged()); + size_t used = rec->bytesUsed(); + SkASSERT(used <= fTotalBytesUsed); + + this->release(rec); + fHash->remove(rec->getKey()); + + fTotalBytesUsed -= used; + fCount -= 1; + + //SkDebugf("-RC count [%3d] bytes %d\n", fCount, fTotalBytesUsed); + + if (gDumpCacheTransactions) { + SkString bytesStr, totalStr; + make_size_str(used, &bytesStr); + make_size_str(fTotalBytesUsed, &totalStr); + SkDebugf("RC: remove %5s %12p key %08x -- total %5s, count %d\n", + bytesStr.c_str(), rec, rec->getHash(), totalStr.c_str(), fCount); + } + + delete rec; +} + +void SkResourceCache::purgeAsNeeded(bool forcePurge) { + size_t byteLimit; + int countLimit; + + if (fDiscardableFactory) { + countLimit = SK_DISCARDABLEMEMORY_SCALEDIMAGECACHE_COUNT_LIMIT; + byteLimit = UINT32_MAX; // no limit based on bytes + } else { + countLimit = SK_MaxS32; // no limit based on count + byteLimit = fTotalByteLimit; + } + + Rec* rec = fTail; + while (rec) { + if (!forcePurge && fTotalBytesUsed < byteLimit && fCount < countLimit) { + break; + } + + Rec* prev = rec->fPrev; + if (rec->canBePurged()) { + this->remove(rec); + } + rec = prev; + } +} + +//#define SK_TRACK_PURGE_SHAREDID_HITRATE + +#ifdef SK_TRACK_PURGE_SHAREDID_HITRATE +static int gPurgeCallCounter; +static int gPurgeHitCounter; +#endif + +void SkResourceCache::purgeSharedID(uint64_t sharedID) { + if (0 == sharedID) { + return; + } + +#ifdef SK_TRACK_PURGE_SHAREDID_HITRATE + gPurgeCallCounter += 1; + bool found = false; +#endif + // go backwards, just like purgeAsNeeded, just to make the code similar. + // could iterate either direction and still be correct. + Rec* rec = fTail; + while (rec) { + Rec* prev = rec->fPrev; + if (rec->getKey().getSharedID() == sharedID) { + // even though the "src" is now dead, caches could still be in-flight, so + // we have to check if it can be removed. + if (rec->canBePurged()) { + this->remove(rec); + } +#ifdef SK_TRACK_PURGE_SHAREDID_HITRATE + found = true; +#endif + } + rec = prev; + } + +#ifdef SK_TRACK_PURGE_SHAREDID_HITRATE + if (found) { + gPurgeHitCounter += 1; + } + + SkDebugf("PurgeShared calls=%d hits=%d rate=%g\n", gPurgeCallCounter, gPurgeHitCounter, + gPurgeHitCounter * 100.0 / gPurgeCallCounter); +#endif +} + +void SkResourceCache::visitAll(Visitor visitor, void* context) { + // go backwards, just like purgeAsNeeded, just to make the code similar. + // could iterate either direction and still be correct. + Rec* rec = fTail; + while (rec) { + visitor(*rec, context); + rec = rec->fPrev; + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +size_t SkResourceCache::setTotalByteLimit(size_t newLimit) { + size_t prevLimit = fTotalByteLimit; + fTotalByteLimit = newLimit; + if (newLimit < prevLimit) { + this->purgeAsNeeded(); + } + return prevLimit; +} + +SkCachedData* SkResourceCache::newCachedData(size_t bytes) { + this->checkMessages(); + + if (fDiscardableFactory) { + SkDiscardableMemory* dm = fDiscardableFactory(bytes); + return dm ? new SkCachedData(bytes, dm) : nullptr; + } else { + return new SkCachedData(sk_malloc_throw(bytes), bytes); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkResourceCache::release(Rec* rec) { + Rec* prev = rec->fPrev; + Rec* next = rec->fNext; + + if (!prev) { + SkASSERT(fHead == rec); + fHead = next; + } else { + prev->fNext = next; + } + + if (!next) { + fTail = prev; + } else { + next->fPrev = prev; + } + + rec->fNext = rec->fPrev = nullptr; +} + +void SkResourceCache::moveToHead(Rec* rec) { + if (fHead == rec) { + return; + } + + SkASSERT(fHead); + SkASSERT(fTail); + + this->validate(); + + this->release(rec); + + fHead->fPrev = rec; + rec->fNext = fHead; + fHead = rec; + + this->validate(); +} + +void SkResourceCache::addToHead(Rec* rec) { + this->validate(); + + rec->fPrev = nullptr; + rec->fNext = fHead; + if (fHead) { + fHead->fPrev = rec; + } + fHead = rec; + if (!fTail) { + fTail = rec; + } + fTotalBytesUsed += rec->bytesUsed(); + fCount += 1; + + this->validate(); +} + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG +void SkResourceCache::validate() const { + if (nullptr == fHead) { + SkASSERT(nullptr == fTail); + SkASSERT(0 == fTotalBytesUsed); + return; + } + + if (fHead == fTail) { + SkASSERT(nullptr == fHead->fPrev); + SkASSERT(nullptr == fHead->fNext); + SkASSERT(fHead->bytesUsed() == fTotalBytesUsed); + return; + } + + SkASSERT(nullptr == fHead->fPrev); + SkASSERT(fHead->fNext); + SkASSERT(nullptr == fTail->fNext); + SkASSERT(fTail->fPrev); + + size_t used = 0; + int count = 0; + const Rec* rec = fHead; + while (rec) { + count += 1; + used += rec->bytesUsed(); + SkASSERT(used <= fTotalBytesUsed); + rec = rec->fNext; + } + SkASSERT(fCount == count); + + rec = fTail; + while (rec) { + SkASSERT(count > 0); + count -= 1; + SkASSERT(used >= rec->bytesUsed()); + used -= rec->bytesUsed(); + rec = rec->fPrev; + } + + SkASSERT(0 == count); + SkASSERT(0 == used); +} +#endif + +void SkResourceCache::dump() const { + this->validate(); + + SkDebugf("SkResourceCache: count=%d bytes=%zu %s\n", + fCount, fTotalBytesUsed, fDiscardableFactory ? "discardable" : "malloc"); +} + +size_t SkResourceCache::setSingleAllocationByteLimit(size_t newLimit) { + size_t oldLimit = fSingleAllocationByteLimit; + fSingleAllocationByteLimit = newLimit; + return oldLimit; +} + +size_t SkResourceCache::getSingleAllocationByteLimit() const { + return fSingleAllocationByteLimit; +} + +size_t SkResourceCache::getEffectiveSingleAllocationByteLimit() const { + // fSingleAllocationByteLimit == 0 means the caller is asking for our default + size_t limit = fSingleAllocationByteLimit; + + // if we're not discardable (i.e. we are fixed-budget) then cap the single-limit + // to our budget. + if (nullptr == fDiscardableFactory) { + if (0 == limit) { + limit = fTotalByteLimit; + } else { + limit = std::min(limit, fTotalByteLimit); + } + } + return limit; +} + +void SkResourceCache::checkMessages() { + TArray msgs; + fPurgeSharedIDInbox.poll(&msgs); + for (int i = 0; i < msgs.size(); ++i) { + this->purgeSharedID(msgs[i].fSharedID); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +static SkResourceCache* gResourceCache = nullptr; +static SkMutex& resource_cache_mutex() { + static SkMutex& mutex = *(new SkMutex); + return mutex; +} + +/** Must hold resource_cache_mutex() when calling. */ +static SkResourceCache* get_cache() { + // resource_cache_mutex() is always held when this is called, so we don't need to be fancy in here. + resource_cache_mutex().assertHeld(); + if (nullptr == gResourceCache) { +#ifdef SK_USE_DISCARDABLE_SCALEDIMAGECACHE + gResourceCache = new SkResourceCache(SkDiscardableMemory::Create); +#else + gResourceCache = new SkResourceCache(SK_DEFAULT_IMAGE_CACHE_LIMIT); +#endif + } + return gResourceCache; +} + +size_t SkResourceCache::GetTotalBytesUsed() { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->getTotalBytesUsed(); +} + +size_t SkResourceCache::GetTotalByteLimit() { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->getTotalByteLimit(); +} + +size_t SkResourceCache::SetTotalByteLimit(size_t newLimit) { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->setTotalByteLimit(newLimit); +} + +SkResourceCache::DiscardableFactory SkResourceCache::GetDiscardableFactory() { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->discardableFactory(); +} + +SkCachedData* SkResourceCache::NewCachedData(size_t bytes) { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->newCachedData(bytes); +} + +void SkResourceCache::Dump() { + SkAutoMutexExclusive am(resource_cache_mutex()); + get_cache()->dump(); +} + +size_t SkResourceCache::SetSingleAllocationByteLimit(size_t size) { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->setSingleAllocationByteLimit(size); +} + +size_t SkResourceCache::GetSingleAllocationByteLimit() { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->getSingleAllocationByteLimit(); +} + +size_t SkResourceCache::GetEffectiveSingleAllocationByteLimit() { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->getEffectiveSingleAllocationByteLimit(); +} + +void SkResourceCache::PurgeAll() { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->purgeAll(); +} + +void SkResourceCache::CheckMessages() { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->checkMessages(); +} + +bool SkResourceCache::Find(const Key& key, FindVisitor visitor, void* context) { + SkAutoMutexExclusive am(resource_cache_mutex()); + return get_cache()->find(key, visitor, context); +} + +void SkResourceCache::Add(Rec* rec, void* payload) { + SkAutoMutexExclusive am(resource_cache_mutex()); + get_cache()->add(rec, payload); +} + +void SkResourceCache::VisitAll(Visitor visitor, void* context) { + SkAutoMutexExclusive am(resource_cache_mutex()); + get_cache()->visitAll(visitor, context); +} + +void SkResourceCache::PostPurgeSharedID(uint64_t sharedID) { + if (sharedID) { + SkMessageBus::Post(PurgeSharedIDMessage(sharedID)); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "include/core/SkGraphics.h" +#include "include/core/SkImageFilter.h" + +size_t SkGraphics::GetResourceCacheTotalBytesUsed() { + return SkResourceCache::GetTotalBytesUsed(); +} + +size_t SkGraphics::GetResourceCacheTotalByteLimit() { + return SkResourceCache::GetTotalByteLimit(); +} + +size_t SkGraphics::SetResourceCacheTotalByteLimit(size_t newLimit) { + return SkResourceCache::SetTotalByteLimit(newLimit); +} + +size_t SkGraphics::GetResourceCacheSingleAllocationByteLimit() { + return SkResourceCache::GetSingleAllocationByteLimit(); +} + +size_t SkGraphics::SetResourceCacheSingleAllocationByteLimit(size_t newLimit) { + return SkResourceCache::SetSingleAllocationByteLimit(newLimit); +} + +void SkGraphics::PurgeResourceCache() { + SkImageFilter_Base::PurgeCache(); + return SkResourceCache::PurgeAll(); +} + +///////////// + +static void dump_visitor(const SkResourceCache::Rec& rec, void*) { + SkDebugf("RC: %12s bytes %9zu discardable %p\n", + rec.getCategory(), rec.bytesUsed(), rec.diagnostic_only_getDiscardable()); +} + +void SkResourceCache::TestDumpMemoryStatistics() { + VisitAll(dump_visitor, nullptr); +} + +static void sk_trace_dump_visitor(const SkResourceCache::Rec& rec, void* context) { + SkTraceMemoryDump* dump = static_cast(context); + SkString dumpName = SkStringPrintf("skia/sk_resource_cache/%s_%p", rec.getCategory(), &rec); + SkDiscardableMemory* discardable = rec.diagnostic_only_getDiscardable(); + if (discardable) { + dump->setDiscardableMemoryBacking(dumpName.c_str(), *discardable); + + // The discardable memory size will be calculated by dumper, but we also dump what we think + // the size of object in memory is irrespective of whether object is live or dead. + dump->dumpNumericValue(dumpName.c_str(), "discardable_size", "bytes", rec.bytesUsed()); + } else { + dump->dumpNumericValue(dumpName.c_str(), "size", "bytes", rec.bytesUsed()); + dump->setMemoryBacking(dumpName.c_str(), "malloc", nullptr); + } +} + +void SkResourceCache::DumpMemoryStatistics(SkTraceMemoryDump* dump) { + // Since resource could be backed by malloc or discardable, the cache always dumps detailed + // stats to be accurate. + VisitAll(sk_trace_dump_visitor, dump); +} diff --git a/gfx/skia/skia/src/core/SkResourceCache.h b/gfx/skia/skia/src/core/SkResourceCache.h new file mode 100644 index 0000000000..3477b295b3 --- /dev/null +++ b/gfx/skia/skia/src/core/SkResourceCache.h @@ -0,0 +1,293 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkResourceCache_DEFINED +#define SkResourceCache_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/private/base/SkTDArray.h" +#include "src/core/SkMessageBus.h" + +class SkCachedData; +class SkDiscardableMemory; +class SkTraceMemoryDump; + +/** + * Cache object for bitmaps (with possible scale in X Y as part of the key). + * + * Multiple caches can be instantiated, but each instance is not implicitly + * thread-safe, so if a given instance is to be shared across threads, the + * caller must manage the access itself (e.g. via a mutex). + * + * As a convenience, a global instance is also defined, which can be safely + * access across threads via the static methods (e.g. FindAndLock, etc.). + */ +class SkResourceCache { +public: + struct Key { + /** Key subclasses must call this after their own fields and data are initialized. + * All fields and data must be tightly packed. + * @param nameSpace must be unique per Key subclass. + * @param sharedID == 0 means ignore this field, does not support group purging. + * @param dataSize is size of fields and data of the subclass, must be a multiple of 4. + */ + void init(void* nameSpace, uint64_t sharedID, size_t dataSize); + + /** Returns the size of this key. */ + size_t size() const { + return fCount32 << 2; + } + + void* getNamespace() const { return fNamespace; } + uint64_t getSharedID() const { return ((uint64_t)fSharedID_hi << 32) | fSharedID_lo; } + + // This is only valid after having called init(). + uint32_t hash() const { return fHash; } + + bool operator==(const Key& other) const { + const uint32_t* a = this->as32(); + const uint32_t* b = other.as32(); + for (int i = 0; i < fCount32; ++i) { // (This checks fCount == other.fCount first.) + if (a[i] != b[i]) { + return false; + } + } + return true; + } + + private: + int32_t fCount32; // local + user contents count32 + uint32_t fHash; + // split uint64_t into hi and lo so we don't force ourselves to pad on 32bit machines. + uint32_t fSharedID_lo; + uint32_t fSharedID_hi; + void* fNamespace; // A unique namespace tag. This is hashed. + /* uint32_t fContents32[] */ + + const uint32_t* as32() const { return (const uint32_t*)this; } + }; + + struct Rec { + typedef SkResourceCache::Key Key; + + Rec() {} + virtual ~Rec() {} + + uint32_t getHash() const { return this->getKey().hash(); } + + virtual const Key& getKey() const = 0; + virtual size_t bytesUsed() const = 0; + + // Called if the cache needs to purge/remove/delete the Rec. Default returns true. + // Subclass may return false if there are outstanding references to it (e.g. bitmaps). + // Will only be deleted/removed-from-the-cache when this returns true. + virtual bool canBePurged() { return true; } + + // A rec is first created/initialized, and then added to the cache. As part of the add(), + // the cache will callback into the rec with postAddInstall, passing in whatever payload + // was passed to add/Add. + // + // This late-install callback exists because the process of add-ing might end up deleting + // the new rec (if an existing rec in the cache has the same key and cannot be purged). + // If the new rec will be deleted during add, the pre-existing one (with the same key) + // will have postAddInstall() called on it instead, so that either way an "install" will + // happen during the add. + virtual void postAddInstall(void*) {} + + // for memory usage diagnostics + virtual const char* getCategory() const = 0; + virtual SkDiscardableMemory* diagnostic_only_getDiscardable() const { return nullptr; } + + private: + Rec* fNext; + Rec* fPrev; + + friend class SkResourceCache; + }; + + // Used with SkMessageBus + struct PurgeSharedIDMessage { + PurgeSharedIDMessage(uint64_t sharedID) : fSharedID(sharedID) {} + uint64_t fSharedID; + }; + + typedef const Rec* ID; + + /** + * Callback function for find(). If called, the cache will have found a match for the + * specified Key, and will pass in the corresponding Rec, along with a caller-specified + * context. The function can read the data in Rec, and copy whatever it likes into context + * (casting context to whatever it really is). + * + * The return value determines what the cache will do with the Rec. If the function returns + * true, then the Rec is considered "valid". If false is returned, the Rec will be considered + * "stale" and will be purged from the cache. + */ + typedef bool (*FindVisitor)(const Rec&, void* context); + + /** + * Returns a locked/pinned SkDiscardableMemory instance for the specified + * number of bytes, or nullptr on failure. + */ + typedef SkDiscardableMemory* (*DiscardableFactory)(size_t bytes); + + /* + * The following static methods are thread-safe wrappers around a global + * instance of this cache. + */ + + /** + * Returns true if the visitor was called on a matching Key, and the visitor returned true. + * + * Find() will search the cache for the specified Key. If no match is found, return false and + * do not call the FindVisitor. If a match is found, return whatever the visitor returns. + * Its return value is interpreted to mean: + * true : Rec is valid + * false : Rec is "stale" -- the cache will purge it. + */ + static bool Find(const Key& key, FindVisitor, void* context); + static void Add(Rec*, void* payload = nullptr); + + typedef void (*Visitor)(const Rec&, void* context); + // Call the visitor for every Rec in the cache. + static void VisitAll(Visitor, void* context); + + static size_t GetTotalBytesUsed(); + static size_t GetTotalByteLimit(); + static size_t SetTotalByteLimit(size_t newLimit); + + static size_t SetSingleAllocationByteLimit(size_t); + static size_t GetSingleAllocationByteLimit(); + static size_t GetEffectiveSingleAllocationByteLimit(); + + static void PurgeAll(); + static void CheckMessages(); + + static void TestDumpMemoryStatistics(); + + /** Dump memory usage statistics of every Rec in the cache using the + SkTraceMemoryDump interface. + */ + static void DumpMemoryStatistics(SkTraceMemoryDump* dump); + + /** + * Returns the DiscardableFactory used by the global cache, or nullptr. + */ + static DiscardableFactory GetDiscardableFactory(); + + static SkCachedData* NewCachedData(size_t bytes); + + static void PostPurgeSharedID(uint64_t sharedID); + + /** + * Call SkDebugf() with diagnostic information about the state of the cache + */ + static void Dump(); + + /////////////////////////////////////////////////////////////////////////// + + /** + * Construct the cache to call DiscardableFactory when it + * allocates memory for the pixels. In this mode, the cache has + * not explicit budget, and so methods like getTotalBytesUsed() + * and getTotalByteLimit() will return 0, and setTotalByteLimit + * will ignore its argument and return 0. + */ + SkResourceCache(DiscardableFactory); + + /** + * Construct the cache, allocating memory with malloc, and respect the + * byteLimit, purging automatically when a new image is added to the cache + * that pushes the total bytesUsed over the limit. Note: The limit can be + * changed at runtime with setTotalByteLimit. + */ + explicit SkResourceCache(size_t byteLimit); + ~SkResourceCache(); + + /** + * Returns true if the visitor was called on a matching Key, and the visitor returned true. + * + * find() will search the cache for the specified Key. If no match is found, return false and + * do not call the FindVisitor. If a match is found, return whatever the visitor returns. + * Its return value is interpreted to mean: + * true : Rec is valid + * false : Rec is "stale" -- the cache will purge it. + */ + bool find(const Key&, FindVisitor, void* context); + void add(Rec*, void* payload = nullptr); + void visitAll(Visitor, void* context); + + size_t getTotalBytesUsed() const { return fTotalBytesUsed; } + size_t getTotalByteLimit() const { return fTotalByteLimit; } + + /** + * This is respected by SkBitmapProcState::possiblyScaleImage. + * 0 is no maximum at all; this is the default. + * setSingleAllocationByteLimit() returns the previous value. + */ + size_t setSingleAllocationByteLimit(size_t maximumAllocationSize); + size_t getSingleAllocationByteLimit() const; + // returns the logical single allocation size (pinning against the budget when the cache + // is not backed by discardable memory. + size_t getEffectiveSingleAllocationByteLimit() const; + + /** + * Set the maximum number of bytes available to this cache. If the current + * cache exceeds this new value, it will be purged to try to fit within + * this new limit. + */ + size_t setTotalByteLimit(size_t newLimit); + + void purgeSharedID(uint64_t sharedID); + + void purgeAll() { + this->purgeAsNeeded(true); + } + + DiscardableFactory discardableFactory() const { return fDiscardableFactory; } + + SkCachedData* newCachedData(size_t bytes); + + /** + * Call SkDebugf() with diagnostic information about the state of the cache + */ + void dump() const; + +private: + Rec* fHead; + Rec* fTail; + + class Hash; + Hash* fHash; + + DiscardableFactory fDiscardableFactory; + + size_t fTotalBytesUsed; + size_t fTotalByteLimit; + size_t fSingleAllocationByteLimit; + int fCount; + + SkMessageBus::Inbox fPurgeSharedIDInbox; + + void checkMessages(); + void purgeAsNeeded(bool forcePurge = false); + + // linklist management + void moveToHead(Rec*); + void addToHead(Rec*); + void release(Rec*); + void remove(Rec*); + + void init(); // called by constructors + +#ifdef SK_DEBUG + void validate() const; +#else + void validate() const {} +#endif +}; +#endif diff --git a/gfx/skia/skia/src/core/SkRuntimeEffect.cpp b/gfx/skia/skia/src/core/SkRuntimeEffect.cpp new file mode 100644 index 0000000000..740937a560 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRuntimeEffect.cpp @@ -0,0 +1,2016 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkRuntimeEffect.h" + +#include "include/core/SkCapabilities.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkData.h" +#include "include/core/SkSurface.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkOnce.h" +#include "include/sksl/DSLCore.h" +#include "src/base/SkUtils.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkLRUCache.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkOpts.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkLocalMatrixShader.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/SkSLUtil.h" +#include "src/sksl/analysis/SkSLProgramUsage.h" +#include "src/sksl/codegen/SkSLRasterPipelineBuilder.h" +#include "src/sksl/codegen/SkSLVMCodeGenerator.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/tracing/SkVMDebugTrace.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrMatrixEffect.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/image/SkImage_Gpu.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +// This flag can be enabled to use the new Raster Pipeline code generator for SkSL. +//#define SK_ENABLE_SKSL_IN_RASTER_PIPELINE + +#ifdef SK_ENABLE_SKSL_IN_RASTER_PIPELINE +#include "src/core/SkStreamPriv.h" +#include "src/sksl/codegen/SkSLRasterPipelineCodeGenerator.h" +#include "src/sksl/tracing/SkRPDebugTrace.h" +constexpr bool kRPEnableLiveTrace = false; +#endif + +#include + +using namespace skia_private; + +#if defined(SK_BUILD_FOR_DEBUGGER) + #define SK_LENIENT_SKSL_DESERIALIZATION 1 +#else + #define SK_LENIENT_SKSL_DESERIALIZATION 0 +#endif + +#ifdef SK_ENABLE_SKSL + +using ChildType = SkRuntimeEffect::ChildType; + +static bool init_uniform_type(const SkSL::Context& ctx, + const SkSL::Type* type, + SkRuntimeEffect::Uniform* v) { + using Type = SkRuntimeEffect::Uniform::Type; + if (type->matches(*ctx.fTypes.fFloat)) { v->type = Type::kFloat; return true; } + if (type->matches(*ctx.fTypes.fHalf)) { v->type = Type::kFloat; return true; } + if (type->matches(*ctx.fTypes.fFloat2)) { v->type = Type::kFloat2; return true; } + if (type->matches(*ctx.fTypes.fHalf2)) { v->type = Type::kFloat2; return true; } + if (type->matches(*ctx.fTypes.fFloat3)) { v->type = Type::kFloat3; return true; } + if (type->matches(*ctx.fTypes.fHalf3)) { v->type = Type::kFloat3; return true; } + if (type->matches(*ctx.fTypes.fFloat4)) { v->type = Type::kFloat4; return true; } + if (type->matches(*ctx.fTypes.fHalf4)) { v->type = Type::kFloat4; return true; } + if (type->matches(*ctx.fTypes.fFloat2x2)) { v->type = Type::kFloat2x2; return true; } + if (type->matches(*ctx.fTypes.fHalf2x2)) { v->type = Type::kFloat2x2; return true; } + if (type->matches(*ctx.fTypes.fFloat3x3)) { v->type = Type::kFloat3x3; return true; } + if (type->matches(*ctx.fTypes.fHalf3x3)) { v->type = Type::kFloat3x3; return true; } + if (type->matches(*ctx.fTypes.fFloat4x4)) { v->type = Type::kFloat4x4; return true; } + if (type->matches(*ctx.fTypes.fHalf4x4)) { v->type = Type::kFloat4x4; return true; } + + if (type->matches(*ctx.fTypes.fInt)) { v->type = Type::kInt; return true; } + if (type->matches(*ctx.fTypes.fInt2)) { v->type = Type::kInt2; return true; } + if (type->matches(*ctx.fTypes.fInt3)) { v->type = Type::kInt3; return true; } + if (type->matches(*ctx.fTypes.fInt4)) { v->type = Type::kInt4; return true; } + + return false; +} + +SkRuntimeEffect::Uniform SkRuntimeEffectPriv::VarAsUniform(const SkSL::Variable& var, + const SkSL::Context& context, + size_t* offset) { + using Uniform = SkRuntimeEffect::Uniform; + SkASSERT(var.modifiers().fFlags & SkSL::Modifiers::kUniform_Flag); + Uniform uni; + uni.name = var.name(); + uni.flags = 0; + uni.count = 1; + + const SkSL::Type* type = &var.type(); + if (type->isArray()) { + uni.flags |= Uniform::kArray_Flag; + uni.count = type->columns(); + type = &type->componentType(); + } + + if (type->hasPrecision() && !type->highPrecision()) { + uni.flags |= Uniform::kHalfPrecision_Flag; + } + + SkAssertResult(init_uniform_type(context, type, &uni)); + if (var.modifiers().fLayout.fFlags & SkSL::Layout::Flag::kColor_Flag) { + uni.flags |= Uniform::kColor_Flag; + } + + uni.offset = *offset; + *offset += uni.sizeInBytes(); + SkASSERT(SkIsAlign4(*offset)); + return uni; +} + +sk_sp SkRuntimeEffectPriv::TransformUniforms( + SkSpan uniforms, + sk_sp originalData, + const SkColorSpace* dstCS) { + SkColorSpaceXformSteps steps(sk_srgb_singleton(), kUnpremul_SkAlphaType, + dstCS, kUnpremul_SkAlphaType); + return TransformUniforms(uniforms, std::move(originalData), steps); +} + +sk_sp SkRuntimeEffectPriv::TransformUniforms( + SkSpan uniforms, + sk_sp originalData, + const SkColorSpaceXformSteps& steps) { + using Flags = SkRuntimeEffect::Uniform::Flags; + using Type = SkRuntimeEffect::Uniform::Type; + + sk_sp data = nullptr; + auto writableData = [&]() { + if (!data) { + data = SkData::MakeWithCopy(originalData->data(), originalData->size()); + } + return data->writable_data(); + }; + + for (const auto& u : uniforms) { + if (u.flags & Flags::kColor_Flag) { + SkASSERT(u.type == Type::kFloat3 || u.type == Type::kFloat4); + if (steps.flags.mask()) { + float* color = SkTAddOffset(writableData(), u.offset); + if (u.type == Type::kFloat4) { + // RGBA, easy case + for (int i = 0; i < u.count; ++i) { + steps.apply(color); + color += 4; + } + } else { + // RGB, need to pad out to include alpha. Technically, this isn't necessary, + // because steps shouldn't include unpremul or premul, and thus shouldn't + // read or write the fourth element. But let's be safe. + float rgba[4]; + for (int i = 0; i < u.count; ++i) { + memcpy(rgba, color, 3 * sizeof(float)); + rgba[3] = 1.0f; + steps.apply(rgba); + memcpy(color, rgba, 3 * sizeof(float)); + color += 3; + } + } + } + } + } + return data ? data : originalData; +} + +const SkSL::RP::Program* SkRuntimeEffect::getRPProgram() const { + // Lazily compile the program the first time `getRPProgram` is called. + // By using an SkOnce, we avoid thread hazards and behave in a conceptually const way, but we + // can avoid the cost of invoking the RP code generator until it's actually needed. + fCompileRPProgramOnce([&] { +#ifdef SK_ENABLE_SKSL_IN_RASTER_PIPELINE + SkSL::SkRPDebugTrace debugTrace; + const_cast(this)->fRPProgram = + MakeRasterPipelineProgram(*fBaseProgram, + fMain, + kRPEnableLiveTrace ? &debugTrace : nullptr); + if (kRPEnableLiveTrace) { + if (fRPProgram) { + SkDebugf("-----\n\n"); + SkDebugfStream stream; + fRPProgram->dump(&stream); + SkDebugf("\n-----\n\n"); + } else { + SkDebugf("----- RP unsupported -----\n\n"); + } + } +#endif + }); + + return fRPProgram.get(); +} + +[[maybe_unused]] static SkSpan uniforms_as_span( + SkSpan uniforms, + sk_sp originalData, + const SkColorSpace* destColorSpace, + SkArenaAlloc* alloc) { + // Transform the uniforms into the destination colorspace. + sk_sp transformedData = SkRuntimeEffectPriv::TransformUniforms(uniforms, + originalData, + destColorSpace); + // If we get the original uniforms back as-is, it's safe to return a pointer into existing data. + if (originalData == transformedData) { + return SkSpan{static_cast(originalData->data()), + originalData->size() / sizeof(float)}; + } + // The transformed uniform data will go out of scope when this function returns, so we must copy + // it directly into the alloc. + int numBytes = transformedData->size(); + int numFloats = numBytes / sizeof(float); + float* uniformsInAlloc = alloc->makeArrayDefault(numFloats); + memcpy(uniformsInAlloc, transformedData->data(), numBytes); + return SkSpan{uniformsInAlloc, numFloats}; +} + +class RuntimeEffectRPCallbacks : public SkSL::RP::Callbacks { +public: + RuntimeEffectRPCallbacks(const SkStageRec& s, + const SkShaderBase::MatrixRec& m, + SkSpan c, + SkSpan u) + : fStage(s), fMatrix(m), fChildren(c), fSampleUsages(u) {} + + bool appendShader(int index) override { + if (SkShader* shader = fChildren[index].shader()) { + if (fSampleUsages[index].isPassThrough()) { + // Given a passthrough sample, the total-matrix is still as valid as before. + return as_SB(shader)->appendStages(fStage, fMatrix); + } + // For a non-passthrough sample, we need to explicitly mark the total-matrix as invalid. + SkShaderBase::MatrixRec nonPassthroughMatrix = fMatrix; + nonPassthroughMatrix.markTotalMatrixInvalid(); + return as_SB(shader)->appendStages(fStage, nonPassthroughMatrix); + } + // Return the paint color when a null child shader is evaluated. + fStage.fPipeline->append_constant_color(fStage.fAlloc, fStage.fPaintColor); + return true; + } + bool appendColorFilter(int index) override { + if (SkColorFilter* colorFilter = fChildren[index].colorFilter()) { + return as_CFB(colorFilter)->appendStages(fStage, /*shaderIsOpaque=*/false); + } + // Return the original color as-is when a null child color filter is evaluated. + return true; + } + bool appendBlender(int index) override { + if (SkBlender* blender = fChildren[index].blender()) { + return as_BB(blender)->appendStages(fStage); + } + // Return a source-over blend when a null blender is evaluated. + fStage.fPipeline->append(SkRasterPipelineOp::srcover); + return true; + } + + // TODO: If an effect calls these intrinsics more than once, we could cache and re-use the steps + // object(s), rather than re-creating them in the arena repeatedly. + void toLinearSrgb() override { + if (!fStage.fDstCS) { + // These intrinsics do nothing when color management is disabled + return; + } + fStage.fAlloc + ->make(fStage.fDstCS, kUnpremul_SkAlphaType, + sk_srgb_linear_singleton(), kUnpremul_SkAlphaType) + ->apply(fStage.fPipeline); + } + void fromLinearSrgb() override { + if (!fStage.fDstCS) { + // These intrinsics do nothing when color management is disabled + return; + } + fStage.fAlloc + ->make(sk_srgb_linear_singleton(), kUnpremul_SkAlphaType, + fStage.fDstCS, kUnpremul_SkAlphaType) + ->apply(fStage.fPipeline); + } + + const SkStageRec& fStage; + const SkShaderBase::MatrixRec& fMatrix; + SkSpan fChildren; + SkSpan fSampleUsages; +}; + +bool SkRuntimeEffectPriv::CanDraw(const SkCapabilities* caps, const SkSL::Program* program) { + SkASSERT(caps && program); + SkASSERT(program->fConfig->enforcesSkSLVersion()); + return program->fConfig->fRequiredSkSLVersion <= caps->skslVersion(); +} + +bool SkRuntimeEffectPriv::CanDraw(const SkCapabilities* caps, const SkRuntimeEffect* effect) { + SkASSERT(effect); + return CanDraw(caps, effect->fBaseProgram.get()); +} + +////////////////////////////////////////////////////////////////////////////// + +static bool flattenable_is_valid_as_child(const SkFlattenable* f) { + if (!f) { return true; } + switch (f->getFlattenableType()) { + case SkFlattenable::kSkShader_Type: + case SkFlattenable::kSkColorFilter_Type: + case SkFlattenable::kSkBlender_Type: + return true; + default: + return false; + } +} + +SkRuntimeEffect::ChildPtr::ChildPtr(sk_sp f) : fChild(std::move(f)) { + SkASSERT(flattenable_is_valid_as_child(fChild.get())); +} + +static sk_sp make_skvm_debug_trace(SkRuntimeEffect* effect, + const SkIPoint& coord) { + auto debugTrace = sk_make_sp(); + debugTrace->setSource(effect->source()); + debugTrace->setTraceCoord(coord); + return debugTrace; +} + +static ChildType child_type(const SkSL::Type& type) { + switch (type.typeKind()) { + case SkSL::Type::TypeKind::kBlender: return ChildType::kBlender; + case SkSL::Type::TypeKind::kColorFilter: return ChildType::kColorFilter; + case SkSL::Type::TypeKind::kShader: return ChildType::kShader; + default: SkUNREACHABLE; + } +} + +static bool verify_child_effects(const std::vector& reflected, + SkSpan effectPtrs) { + // Verify that the number of passed-in child-effect pointers matches the SkSL code. + if (reflected.size() != effectPtrs.size()) { + return false; + } + + // Verify that each child object's type matches its declared type in the SkSL. + for (size_t i = 0; i < effectPtrs.size(); ++i) { + std::optional effectType = effectPtrs[i].type(); + if (effectType && effectType != reflected[i].type) { + return false; + } + } + return true; +} + +/** + * If `effect` is specified, then the number and type of child objects are validated against the + * children() of `effect`. If it's nullptr, this is skipped, allowing deserialization of children, + * even when the effect could not be constructed (ie, due to malformed SkSL). + */ +static bool read_child_effects(SkReadBuffer& buffer, + const SkRuntimeEffect* effect, + TArray* children) { + size_t childCount = buffer.read32(); + if (effect && !buffer.validate(childCount == effect->children().size())) { + return false; + } + + children->clear(); + children->reserve_back(childCount); + + for (size_t i = 0; i < childCount; i++) { + sk_sp obj(buffer.readRawFlattenable()); + if (!flattenable_is_valid_as_child(obj.get())) { + buffer.validate(false); + return false; + } + children->push_back(std::move(obj)); + } + + // If we are validating against an effect, make sure any (non-null) children are the right type + if (effect) { + auto childInfo = effect->children(); + SkASSERT(childInfo.size() == SkToSizeT(children->size())); + for (size_t i = 0; i < childCount; i++) { + std::optional ct = (*children)[i].type(); + if (ct.has_value() && (*ct) != childInfo[i].type) { + buffer.validate(false); + } + } + } + + return buffer.isValid(); +} + +static void write_child_effects(SkWriteBuffer& buffer, + const std::vector& children) { + buffer.write32(children.size()); + for (const auto& child : children) { + buffer.writeFlattenable(child.flattenable()); + } +} + +static std::vector make_skvm_uniforms(skvm::Builder* p, + skvm::Uniforms* uniforms, + size_t inputSize, + const SkData& inputs) { + SkASSERTF(!(inputSize & 3), "inputSize was %zu, expected a multiple of 4", inputSize); + + const int32_t* data = reinterpret_cast(inputs.data()); + const size_t uniformCount = inputSize / sizeof(int32_t); + std::vector uniform; + uniform.reserve(uniformCount); + for (size_t index = 0; index < uniformCount; ++index) { + int32_t bits; + memcpy(&bits, data + index, sizeof(int32_t)); + uniform.push_back(p->uniform32(uniforms->push(bits)).id); + } + + return uniform; +} + +SkSL::ProgramSettings SkRuntimeEffect::MakeSettings(const Options& options) { + SkSL::ProgramSettings settings; + settings.fInlineThreshold = 0; + settings.fForceNoInline = options.forceUnoptimized; + settings.fOptimize = !options.forceUnoptimized; + settings.fMaxVersionAllowed = options.maxVersionAllowed; + + // SkSL created by the GPU backend is typically parsed, converted to a backend format, + // and the IR is immediately discarded. In that situation, it makes sense to use node + // pools to accelerate the IR allocations. Here, SkRuntimeEffect instances are often + // long-lived (especially those created internally for runtime FPs). In this situation, + // we're willing to pay for a slightly longer compile so that we don't waste huge + // amounts of memory. + settings.fUseMemoryPool = false; + return settings; +} + +// TODO: Many errors aren't caught until we process the generated Program here. Catching those +// in the IR generator would provide better errors messages (with locations). +#define RETURN_FAILURE(...) return Result{nullptr, SkStringPrintf(__VA_ARGS__)} + +SkRuntimeEffect::Result SkRuntimeEffect::MakeFromSource(SkString sksl, + const Options& options, + SkSL::ProgramKind kind) { + SkSL::Compiler compiler(SkSL::ShaderCapsFactory::Standalone()); + SkSL::ProgramSettings settings = MakeSettings(options); + std::unique_ptr program = + compiler.convertProgram(kind, std::string(sksl.c_str(), sksl.size()), settings); + + if (!program) { + RETURN_FAILURE("%s", compiler.errorText().c_str()); + } + + return MakeInternal(std::move(program), options, kind); +} + +SkRuntimeEffect::Result SkRuntimeEffect::MakeInternal(std::unique_ptr program, + const Options& options, + SkSL::ProgramKind kind) { + SkSL::Compiler compiler(SkSL::ShaderCapsFactory::Standalone()); + + uint32_t flags = 0; + switch (kind) { + case SkSL::ProgramKind::kPrivateRuntimeColorFilter: + case SkSL::ProgramKind::kRuntimeColorFilter: + // TODO(skia:11209): Figure out a way to run ES3+ color filters on the CPU. This doesn't + // need to be fast - it could just be direct IR evaluation. But without it, there's no + // way for us to fully implement the SkColorFilter API (eg, `filterColor`) + if (!SkRuntimeEffectPriv::CanDraw(SkCapabilities::RasterBackend().get(), + program.get())) { + RETURN_FAILURE("SkSL color filters must target #version 100"); + } + flags |= kAllowColorFilter_Flag; + break; + case SkSL::ProgramKind::kPrivateRuntimeShader: + case SkSL::ProgramKind::kRuntimeShader: + flags |= kAllowShader_Flag; + break; + case SkSL::ProgramKind::kPrivateRuntimeBlender: + case SkSL::ProgramKind::kRuntimeBlender: + flags |= kAllowBlender_Flag; + break; + default: + SkUNREACHABLE; + } + + // Find 'main', then locate the sample coords parameter. (It might not be present.) + const SkSL::FunctionDeclaration* main = program->getFunction("main"); + if (!main) { + RETURN_FAILURE("missing 'main' function"); + } + const auto& mainParams = main->parameters(); + auto iter = std::find_if(mainParams.begin(), mainParams.end(), [](const SkSL::Variable* p) { + return p->modifiers().fLayout.fBuiltin == SK_MAIN_COORDS_BUILTIN; + }); + const SkSL::ProgramUsage::VariableCounts sampleCoordsUsage = + iter != mainParams.end() ? program->usage()->get(**iter) + : SkSL::ProgramUsage::VariableCounts{}; + + if (sampleCoordsUsage.fRead || sampleCoordsUsage.fWrite) { + flags |= kUsesSampleCoords_Flag; + } + + // Color filters and blends are not allowed to depend on position (local or device) in any way. + // The signature of main, and the declarations in sksl_rt_colorfilter/sksl_rt_blend should + // guarantee this. + if (flags & (kAllowColorFilter_Flag | kAllowBlender_Flag)) { + SkASSERT(!(flags & kUsesSampleCoords_Flag)); + SkASSERT(!SkSL::Analysis::ReferencesFragCoords(*program)); + } + + if (SkSL::Analysis::CallsSampleOutsideMain(*program)) { + flags |= kSamplesOutsideMain_Flag; + } + + // Determine if this effect uses of the color transform intrinsics. Effects need to know this + // so they can allocate color transform objects, etc. + if (SkSL::Analysis::CallsColorTransformIntrinsics(*program)) { + flags |= kUsesColorTransform_Flag; + } + + // Shaders are the only thing that cares about this, but it's inexpensive (and safe) to call. + if (SkSL::Analysis::ReturnsOpaqueColor(*main->definition())) { + flags |= kAlwaysOpaque_Flag; + } + + size_t offset = 0; + std::vector uniforms; + std::vector children; + std::vector sampleUsages; + int elidedSampleCoords = 0; + const SkSL::Context& ctx(compiler.context()); + + // Go through program elements, pulling out information that we need + for (const SkSL::ProgramElement* elem : program->elements()) { + // Variables (uniform, etc.) + if (elem->is()) { + const SkSL::GlobalVarDeclaration& global = elem->as(); + const SkSL::VarDeclaration& varDecl = global.declaration()->as(); + + const SkSL::Variable& var = *varDecl.var(); + const SkSL::Type& varType = var.type(); + + // Child effects that can be sampled ('shader', 'colorFilter', 'blender') + if (varType.isEffectChild()) { + Child c; + c.name = var.name(); + c.type = child_type(varType); + c.index = children.size(); + children.push_back(c); + auto usage = SkSL::Analysis::GetSampleUsage( + *program, var, sampleCoordsUsage.fWrite != 0, &elidedSampleCoords); + // If the child is never sampled, we pretend that it's actually in PassThrough mode. + // Otherwise, the GP code for collecting transforms and emitting transform code gets + // very confused, leading to asserts and bad (backend) shaders. There's an implicit + // assumption that every FP is used by its parent. (skbug.com/12429) + sampleUsages.push_back(usage.isSampled() ? usage + : SkSL::SampleUsage::PassThrough()); + } + // 'uniform' variables + else if (var.modifiers().fFlags & SkSL::Modifiers::kUniform_Flag) { + uniforms.push_back(SkRuntimeEffectPriv::VarAsUniform(var, ctx, &offset)); + } + } + } + + // If the sample coords are never written to, then we will have converted sample calls that use + // them unmodified into "passthrough" sampling. If all references to the sample coords were of + // that form, then we don't actually "use" sample coords. We unset the flag to prevent creating + // an extra (unused) varying holding the coords. + if (elidedSampleCoords == sampleCoordsUsage.fRead && sampleCoordsUsage.fWrite == 0) { + flags &= ~kUsesSampleCoords_Flag; + } + +#undef RETURN_FAILURE + + sk_sp effect(new SkRuntimeEffect(std::move(program), + options, + *main->definition(), + std::move(uniforms), + std::move(children), + std::move(sampleUsages), + flags)); + return Result{std::move(effect), SkString()}; +} + +sk_sp SkRuntimeEffect::makeUnoptimizedClone() { + // Compile with maximally-permissive options; any restrictions we need to enforce were already + // handled when the original SkRuntimeEffect was made. We don't keep around the Options struct + // from when it was initially made so we don't know what was originally requested. + Options options; + options.forceUnoptimized = true; + options.maxVersionAllowed = SkSL::Version::k300; + options.allowPrivateAccess = true; + + // We do know the original ProgramKind, so we don't need to re-derive it. + SkSL::ProgramKind kind = fBaseProgram->fConfig->fKind; + + // Attempt to recompile the program's source with optimizations off. This ensures that the + // Debugger shows results on every line, even for things that could be optimized away (static + // branches, unused variables, etc). If recompilation fails, we fall back to the original code. + SkSL::Compiler compiler(SkSL::ShaderCapsFactory::Standalone()); + SkSL::ProgramSettings settings = MakeSettings(options); + std::unique_ptr program = + compiler.convertProgram(kind, *fBaseProgram->fSource, settings); + + if (!program) { + // Turning off compiler optimizations can theoretically expose a program error that + // had been optimized away (e.g. "all control paths return a value" might be found on a path + // that is completely eliminated in the optimized program). + // If this happens, the debugger will just have to show the optimized code. + return sk_ref_sp(this); + } + + SkRuntimeEffect::Result result = MakeInternal(std::move(program), options, kind); + if (!result.effect) { + // Nothing in MakeInternal should change as a result of optimizations being toggled. + SkDEBUGFAILF("makeUnoptimizedClone: MakeInternal failed\n%s", + result.errorText.c_str()); + return sk_ref_sp(this); + } + + return result.effect; +} + +SkRuntimeEffect::Result SkRuntimeEffect::MakeForColorFilter(SkString sksl, const Options& options) { + auto programKind = options.allowPrivateAccess ? SkSL::ProgramKind::kPrivateRuntimeColorFilter + : SkSL::ProgramKind::kRuntimeColorFilter; + auto result = MakeFromSource(std::move(sksl), options, programKind); + SkASSERT(!result.effect || result.effect->allowColorFilter()); + return result; +} + +SkRuntimeEffect::Result SkRuntimeEffect::MakeForShader(SkString sksl, const Options& options) { + auto programKind = options.allowPrivateAccess ? SkSL::ProgramKind::kPrivateRuntimeShader + : SkSL::ProgramKind::kRuntimeShader; + auto result = MakeFromSource(std::move(sksl), options, programKind); + SkASSERT(!result.effect || result.effect->allowShader()); + return result; +} + +SkRuntimeEffect::Result SkRuntimeEffect::MakeForBlender(SkString sksl, const Options& options) { + auto programKind = options.allowPrivateAccess ? SkSL::ProgramKind::kPrivateRuntimeBlender + : SkSL::ProgramKind::kRuntimeBlender; + auto result = MakeFromSource(std::move(sksl), options, programKind); + SkASSERT(!result.effect || result.effect->allowBlender()); + return result; +} + +sk_sp SkMakeCachedRuntimeEffect( + SkRuntimeEffect::Result (*make)(SkString sksl, const SkRuntimeEffect::Options&), + SkString sksl) { + SK_BEGIN_REQUIRE_DENSE + struct Key { + uint32_t skslHashA; + uint32_t skslHashB; + + bool operator==(const Key& that) const { + return this->skslHashA == that.skslHashA + && this->skslHashB == that.skslHashB; + } + + explicit Key(const SkString& sksl) + : skslHashA(SkOpts::hash(sksl.c_str(), sksl.size(), 0)) + , skslHashB(SkOpts::hash(sksl.c_str(), sksl.size(), 1)) {} + }; + SK_END_REQUIRE_DENSE + + static auto* mutex = new SkMutex; + static auto* cache = new SkLRUCache>(11/*totally arbitrary*/); + + Key key(sksl); + { + SkAutoMutexExclusive _(*mutex); + if (sk_sp* found = cache->find(key)) { + return *found; + } + } + + SkRuntimeEffect::Options options; + SkRuntimeEffectPriv::AllowPrivateAccess(&options); + + auto [effect, err] = make(std::move(sksl), options); + if (!effect) { + SkDEBUGFAILF("%s", err.c_str()); + return nullptr; + } + SkASSERT(err.isEmpty()); + + { + SkAutoMutexExclusive _(*mutex); + cache->insert_or_update(key, effect); + } + return effect; +} + +static size_t uniform_element_size(SkRuntimeEffect::Uniform::Type type) { + switch (type) { + case SkRuntimeEffect::Uniform::Type::kFloat: return sizeof(float); + case SkRuntimeEffect::Uniform::Type::kFloat2: return sizeof(float) * 2; + case SkRuntimeEffect::Uniform::Type::kFloat3: return sizeof(float) * 3; + case SkRuntimeEffect::Uniform::Type::kFloat4: return sizeof(float) * 4; + + case SkRuntimeEffect::Uniform::Type::kFloat2x2: return sizeof(float) * 4; + case SkRuntimeEffect::Uniform::Type::kFloat3x3: return sizeof(float) * 9; + case SkRuntimeEffect::Uniform::Type::kFloat4x4: return sizeof(float) * 16; + + case SkRuntimeEffect::Uniform::Type::kInt: return sizeof(int); + case SkRuntimeEffect::Uniform::Type::kInt2: return sizeof(int) * 2; + case SkRuntimeEffect::Uniform::Type::kInt3: return sizeof(int) * 3; + case SkRuntimeEffect::Uniform::Type::kInt4: return sizeof(int) * 4; + default: SkUNREACHABLE; + } +} + +size_t SkRuntimeEffect::Uniform::sizeInBytes() const { + static_assert(sizeof(int) == sizeof(float)); + return uniform_element_size(this->type) * this->count; +} + +SkRuntimeEffect::SkRuntimeEffect(std::unique_ptr baseProgram, + const Options& options, + const SkSL::FunctionDefinition& main, + std::vector&& uniforms, + std::vector&& children, + std::vector&& sampleUsages, + uint32_t flags) + : fHash(SkOpts::hash_fn(baseProgram->fSource->c_str(), baseProgram->fSource->size(), 0)) + , fBaseProgram(std::move(baseProgram)) + , fMain(main) + , fUniforms(std::move(uniforms)) + , fChildren(std::move(children)) + , fSampleUsages(std::move(sampleUsages)) + , fFlags(flags) { + SkASSERT(fBaseProgram); + SkASSERT(fChildren.size() == fSampleUsages.size()); + + // Everything from SkRuntimeEffect::Options which could influence the compiled result needs to + // be accounted for in `fHash`. If you've added a new field to Options and caused the static- + // assert below to trigger, please incorporate your field into `fHash` and update KnownOptions + // to match the layout of Options. + struct KnownOptions { + bool forceUnoptimized, allowPrivateAccess; + SkSL::Version maxVersionAllowed; + }; + static_assert(sizeof(Options) == sizeof(KnownOptions)); + fHash = SkOpts::hash_fn(&options.forceUnoptimized, + sizeof(options.forceUnoptimized), fHash); + fHash = SkOpts::hash_fn(&options.allowPrivateAccess, + sizeof(options.allowPrivateAccess), fHash); + fHash = SkOpts::hash_fn(&options.maxVersionAllowed, + sizeof(options.maxVersionAllowed), fHash); + + fFilterColorProgram = SkFilterColorProgram::Make(this); +} + +SkRuntimeEffect::~SkRuntimeEffect() = default; + +const std::string& SkRuntimeEffect::source() const { + return *fBaseProgram->fSource; +} + +size_t SkRuntimeEffect::uniformSize() const { + return fUniforms.empty() ? 0 + : SkAlign4(fUniforms.back().offset + fUniforms.back().sizeInBytes()); +} + +const SkRuntimeEffect::Uniform* SkRuntimeEffect::findUniform(std::string_view name) const { + auto iter = std::find_if(fUniforms.begin(), fUniforms.end(), [name](const Uniform& u) { + return u.name == name; + }); + return iter == fUniforms.end() ? nullptr : &(*iter); +} + +const SkRuntimeEffect::Child* SkRuntimeEffect::findChild(std::string_view name) const { + auto iter = std::find_if(fChildren.begin(), fChildren.end(), [name](const Child& c) { + return c.name == name; + }); + return iter == fChildren.end() ? nullptr : &(*iter); +} + +std::unique_ptr SkFilterColorProgram::Make(const SkRuntimeEffect* effect) { + // Our per-effect program technique is only possible (and necessary) for color filters + if (!effect->allowColorFilter()) { + return nullptr; + } + + // TODO(skia:10479): Can we support this? When the color filter is invoked like this, there + // may not be a real working space? If there is, we'd need to add it as a parameter to eval, + // and then coordinate where the relevant uniforms go. For now, just fall back to the slow + // path if we see these intrinsics being called. + if (effect->usesColorTransform()) { + return nullptr; + } + + // We require that any children are color filters (not shaders or blenders). In theory, we could + // detect the coords being passed to shader children, and replicate those calls, but that's very + // complicated, and has diminishing returns. (eg, for table lookup color filters). + if (!std::all_of(effect->fChildren.begin(), + effect->fChildren.end(), + [](const SkRuntimeEffect::Child& c) { + return c.type == ChildType::kColorFilter; + })) { + return nullptr; + } + + skvm::Builder p; + + // For SkSL uniforms, we reserve space and allocate skvm Uniform ids for each one. When we run + // the program, these ids will be loads from the *first* arg ptr, the uniform data of the + // specific color filter instance. + skvm::Uniforms skslUniforms{p.uniform(), 0}; + const size_t uniformCount = effect->uniformSize() / 4; + std::vector uniform; + uniform.reserve(uniformCount); + for (size_t i = 0; i < uniformCount; i++) { + uniform.push_back(p.uniform32(skslUniforms.push(/*placeholder*/ 0)).id); + } + + // We reserve a uniform color for each child invocation. While processing the SkSL, we record + // the index of the child, and the color being filtered (in a SampleCall struct). + // When we run this program later, we use the SampleCall to evaluate the correct child, and + // populate these uniform values. These Uniform ids are loads from the *second* arg ptr. + // If the color being passed is too complex for us to describe and re-create using SampleCall, + // we are unable to use this per-effect program, and callers will need to fall back to another + // (slower) implementation. + skvm::Uniforms childColorUniforms{p.uniform(), 0}; + skvm::Color inputColor = p.uniformColor(/*placeholder*/ SkColors::kWhite, &childColorUniforms); + std::vector sampleCalls; + + class Callbacks : public SkSL::SkVMCallbacks { + public: + Callbacks(skvm::Builder* builder, + const skvm::Uniforms* skslUniforms, + skvm::Uniforms* childColorUniforms, + skvm::Color inputColor, + std::vector* sampleCalls) + : fBuilder(builder) + , fSkslUniforms(skslUniforms) + , fChildColorUniforms(childColorUniforms) + , fInputColor(inputColor) + , fSampleCalls(sampleCalls) {} + + bool isSimpleUniform(skvm::Color c, int* baseOffset) { + skvm::Uniform ur, ug, ub, ua; + if (!fBuilder->allUniform(c.r.id, &ur, c.g.id, &ug, c.b.id, &ub, c.a.id, &ua)) { + return false; + } + skvm::Ptr uniPtr = fSkslUniforms->base; + if (ur.ptr != uniPtr || ug.ptr != uniPtr || ub.ptr != uniPtr || ua.ptr != uniPtr) { + return false; + } + *baseOffset = ur.offset; + return ug.offset == ur.offset + 4 && + ub.offset == ur.offset + 8 && + ua.offset == ur.offset + 12; + } + + static bool IDsEqual(skvm::Color x, skvm::Color y) { + return x.r.id == y.r.id && x.g.id == y.g.id && x.b.id == y.b.id && x.a.id == y.a.id; + } + + skvm::Color sampleColorFilter(int ix, skvm::Color c) override { + skvm::Color result = + fBuilder->uniformColor(/*placeholder*/ SkColors::kWhite, fChildColorUniforms); + SkFilterColorProgram::SampleCall call; + call.fChild = ix; + if (IDsEqual(c, fInputColor)) { + call.fKind = SkFilterColorProgram::SampleCall::Kind::kInputColor; + } else if (fBuilder->allImm(c.r.id, &call.fImm.fR, + c.g.id, &call.fImm.fG, + c.b.id, &call.fImm.fB, + c.a.id, &call.fImm.fA)) { + call.fKind = SkFilterColorProgram::SampleCall::Kind::kImmediate; + } else if (auto it = std::find_if(fChildColors.begin(), + fChildColors.end(), + [&](skvm::Color x) { return IDsEqual(x, c); }); + it != fChildColors.end()) { + call.fKind = SkFilterColorProgram::SampleCall::Kind::kPrevious; + call.fPrevious = SkTo(it - fChildColors.begin()); + } else if (isSimpleUniform(c, &call.fOffset)) { + call.fKind = SkFilterColorProgram::SampleCall::Kind::kUniform; + } else { + fAllSampleCallsSupported = false; + } + fSampleCalls->push_back(call); + fChildColors.push_back(result); + return result; + } + + // We did an early return from this function if we saw any child that wasn't a shader, so + // it should be impossible for either of these callbacks to occur: + skvm::Color sampleShader(int, skvm::Coord) override { + SkDEBUGFAIL("Unexpected child type"); + return {}; + } + skvm::Color sampleBlender(int, skvm::Color, skvm::Color) override { + SkDEBUGFAIL("Unexpected child type"); + return {}; + } + + // We did an early return from this function if we saw any call to these intrinsics, so it + // should be impossible for either of these callbacks to occur: + skvm::Color toLinearSrgb(skvm::Color color) override { + SkDEBUGFAIL("Unexpected color transform intrinsic"); + return {}; + } + skvm::Color fromLinearSrgb(skvm::Color color) override { + SkDEBUGFAIL("Unexpected color transform intrinsic"); + return {}; + } + + skvm::Builder* fBuilder; + const skvm::Uniforms* fSkslUniforms; + skvm::Uniforms* fChildColorUniforms; + skvm::Color fInputColor; + std::vector* fSampleCalls; + + std::vector fChildColors; + bool fAllSampleCallsSupported = true; + }; + Callbacks callbacks(&p, &skslUniforms, &childColorUniforms, inputColor, &sampleCalls); + + // Emit the skvm instructions for the SkSL + skvm::Coord zeroCoord = {p.splat(0.0f), p.splat(0.0f)}; + skvm::Color result = SkSL::ProgramToSkVM(*effect->fBaseProgram, + effect->fMain, + &p, + /*debugTrace=*/nullptr, + SkSpan(uniform), + /*device=*/zeroCoord, + /*local=*/zeroCoord, + inputColor, + inputColor, + &callbacks); + + // Then store the result to the *third* arg ptr + p.store({skvm::PixelFormat::FLOAT, 32, 32, 32, 32, 0, 32, 64, 96}, + p.varying(), result); + + if (!callbacks.fAllSampleCallsSupported) { + return nullptr; + } + + // This is conservative. If a filter gets the input color by sampling a null child, we'll + // return an (acceptable) false negative. All internal runtime color filters should work. + bool alphaUnchanged = (inputColor.a.id == result.a.id); + + // We'll use this program to filter one color at a time, don't bother with jit + return std::unique_ptr( + new SkFilterColorProgram(p.done(/*debug_name=*/nullptr, /*allow_jit=*/false), + std::move(sampleCalls), + alphaUnchanged)); +} + +SkFilterColorProgram::SkFilterColorProgram(skvm::Program program, + std::vector sampleCalls, + bool alphaUnchanged) + : fProgram(std::move(program)) + , fSampleCalls(std::move(sampleCalls)) + , fAlphaUnchanged(alphaUnchanged) {} + +SkPMColor4f SkFilterColorProgram::eval( + const SkPMColor4f& inColor, + const void* uniformData, + std::function evalChild) const { + // Our program defines sampling any child as returning a uniform color. Assemble a buffer + // containing those colors. The first entry is always the input color. Subsequent entries + // are for each sample call, based on the information in fSampleCalls. For any null children, + // the sample result is just the passed-in color. + SkSTArray<4, SkPMColor4f, true> childColors; + childColors.push_back(inColor); + for (const auto& s : fSampleCalls) { + SkPMColor4f passedColor = inColor; + switch (s.fKind) { + case SampleCall::Kind::kInputColor: break; + case SampleCall::Kind::kImmediate: passedColor = s.fImm; break; + case SampleCall::Kind::kPrevious: passedColor = childColors[s.fPrevious + 1]; break; + case SampleCall::Kind::kUniform: + passedColor = *SkTAddOffset(uniformData, s.fOffset); + break; + } + childColors.push_back(evalChild(s.fChild, passedColor)); + } + + SkPMColor4f result; + fProgram.eval(1, uniformData, childColors.begin(), result.vec()); + return result; +} + +const SkFilterColorProgram* SkRuntimeEffect::getFilterColorProgram() const { + return fFilterColorProgram.get(); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) +static GrFPResult make_effect_fp(sk_sp effect, + const char* name, + sk_sp uniforms, + std::unique_ptr inputFP, + std::unique_ptr destColorFP, + SkSpan children, + const GrFPArgs& childArgs) { + SkSTArray<8, std::unique_ptr> childFPs; + for (const auto& child : children) { + std::optional type = child.type(); + if (type == ChildType::kShader) { + // Convert a SkShader into a child FP. + SkShaderBase::MatrixRec mRec(SkMatrix::I()); + mRec.markTotalMatrixInvalid(); + auto childFP = as_SB(child.shader())->asFragmentProcessor(childArgs, mRec); + if (!childFP) { + return GrFPFailure(std::move(inputFP)); + } + childFPs.push_back(std::move(childFP)); + } else if (type == ChildType::kColorFilter) { + // Convert a SkColorFilter into a child FP. + auto [success, childFP] = as_CFB(child.colorFilter()) + ->asFragmentProcessor(/*inputFP=*/nullptr, + childArgs.fContext, + *childArgs.fDstColorInfo, + childArgs.fSurfaceProps); + if (!success) { + return GrFPFailure(std::move(inputFP)); + } + childFPs.push_back(std::move(childFP)); + } else if (type == ChildType::kBlender) { + // Convert a SkBlender into a child FP. + auto childFP = as_BB(child.blender())->asFragmentProcessor( + /*srcFP=*/nullptr, + GrFragmentProcessor::DestColor(), + childArgs); + if (!childFP) { + return GrFPFailure(std::move(inputFP)); + } + childFPs.push_back(std::move(childFP)); + } else { + // We have a null child effect. + childFPs.push_back(nullptr); + } + } + auto fp = GrSkSLFP::MakeWithData(std::move(effect), + name, + childArgs.fDstColorInfo->refColorSpace(), + std::move(inputFP), + std::move(destColorFP), + std::move(uniforms), + SkSpan(childFPs)); + SkASSERT(fp); + return GrFPSuccess(std::move(fp)); +} +#endif + +#if defined(SK_GRAPHITE) +static void add_children_to_key(SkSpan children, + SkSpan childInfo, + const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) { + using namespace skgpu::graphite; + + SkASSERT(children.size() == childInfo.size()); + + for (size_t index = 0; index < children.size(); ++index) { + const SkRuntimeEffect::ChildPtr& child = children[index]; + std::optional type = child.type(); + if (type == ChildType::kShader) { + as_SB(child.shader())->addToKey(keyContext, builder, gatherer); + } else if (type == ChildType::kColorFilter) { + as_CFB(child.colorFilter())->addToKey(keyContext, builder, gatherer); + } else if (type == ChildType::kBlender) { + as_BB(child.blender()) + ->addToKey(keyContext, builder, gatherer, DstColorType::kChildOutput); + } else { + // We don't have a child effect. Substitute in a no-op effect. + switch (childInfo[index].type) { + case ChildType::kShader: + case ChildType::kColorFilter: + // A "passthrough" shader returns the input color as-is. + PassthroughShaderBlock::BeginBlock(keyContext, builder, gatherer); + builder->endBlock(); + break; + + case ChildType::kBlender: + // A "passthrough" blender performs `blend_src_over(src, dest)`. + PassthroughBlenderBlock::BeginBlock(keyContext, builder, gatherer); + builder->endBlock(); + break; + } + } + } +} +#endif + +class RuntimeEffectVMCallbacks : public SkSL::SkVMCallbacks { +public: + RuntimeEffectVMCallbacks(skvm::Builder* builder, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc, + const std::vector& children, + const SkShaderBase::MatrixRec& mRec, + skvm::Color inColor, + const SkColorInfo& colorInfo) + : fBuilder(builder) + , fUniforms(uniforms) + , fAlloc(alloc) + , fChildren(children) + , fMRec(mRec) + , fInColor(inColor) + , fColorInfo(colorInfo) {} + + skvm::Color sampleShader(int ix, skvm::Coord coord) override { + // We haven't tracked device coords and the runtime effect could have arbitrarily + // manipulated the passed coords. We should be in a state where any pending matrix was + // already applied before the runtime effect's code could have manipulated the coords + // and the total matrix from child shader to device space is flagged as unknown. + SkASSERT(!fMRec.hasPendingMatrix()); + SkASSERT(!fMRec.totalMatrixIsValid()); + if (SkShader* shader = fChildren[ix].shader()) { + return as_SB(shader)->program(fBuilder, + coord, + coord, + fInColor, + fMRec, + fColorInfo, + fUniforms, + fAlloc); + } + return fInColor; + } + + skvm::Color sampleColorFilter(int ix, skvm::Color color) override { + if (SkColorFilter* colorFilter = fChildren[ix].colorFilter()) { + return as_CFB(colorFilter)->program(fBuilder, color, fColorInfo, fUniforms, fAlloc); + } + return color; + } + + skvm::Color sampleBlender(int ix, skvm::Color src, skvm::Color dst) override { + if (SkBlender* blender = fChildren[ix].blender()) { + return as_BB(blender)->program(fBuilder, src, dst, fColorInfo, fUniforms, fAlloc); + } + return blend(SkBlendMode::kSrcOver, src, dst); + } + + skvm::Color toLinearSrgb(skvm::Color color) override { + if (!fColorInfo.colorSpace()) { + // These intrinsics do nothing when color management is disabled + return color; + } + return SkColorSpaceXformSteps{fColorInfo.colorSpace(), kUnpremul_SkAlphaType, + sk_srgb_linear_singleton(), kUnpremul_SkAlphaType} + .program(fBuilder, fUniforms, color); + } + + skvm::Color fromLinearSrgb(skvm::Color color) override { + if (!fColorInfo.colorSpace()) { + // These intrinsics do nothing when color management is disabled + return color; + } + return SkColorSpaceXformSteps{sk_srgb_linear_singleton(), kUnpremul_SkAlphaType, + fColorInfo.colorSpace(), kUnpremul_SkAlphaType} + .program(fBuilder, fUniforms, color); + } + + skvm::Builder* fBuilder; + skvm::Uniforms* fUniforms; + SkArenaAlloc* fAlloc; + const std::vector& fChildren; + const SkShaderBase::MatrixRec& fMRec; + const skvm::Color fInColor; + const SkColorInfo& fColorInfo; +}; + +class SkRuntimeColorFilter : public SkColorFilterBase { +public: + SkRuntimeColorFilter(sk_sp effect, + sk_sp uniforms, + SkSpan children) + : fEffect(std::move(effect)) + , fUniforms(std::move(uniforms)) + , fChildren(children.begin(), children.end()) {} + +#if defined(SK_GANESH) + GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext* context, + const GrColorInfo& colorInfo, + const SkSurfaceProps& props) const override { + sk_sp uniforms = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + fUniforms, + colorInfo.colorSpace()); + SkASSERT(uniforms); + + GrFPArgs childArgs(context, &colorInfo, props); + return make_effect_fp(fEffect, + "runtime_color_filter", + std::move(uniforms), + std::move(inputFP), + /*destColorFP=*/nullptr, + SkSpan(fChildren), + childArgs); + } +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const override { + using namespace skgpu::graphite; + + sk_sp uniforms = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + fUniforms, + keyContext.dstColorInfo().colorSpace()); + SkASSERT(uniforms); + + RuntimeEffectBlock::BeginBlock(keyContext, builder, gatherer, + { fEffect, std::move(uniforms) }); + + add_children_to_key(fChildren, fEffect->children(), keyContext, builder, gatherer); + + builder->endBlock(); + } +#endif + + bool appendStages(const SkStageRec& rec, bool) const override { +#ifdef SK_ENABLE_SKSL_IN_RASTER_PIPELINE + if (!SkRuntimeEffectPriv::CanDraw(SkCapabilities::RasterBackend().get(), fEffect.get())) { + // SkRP has support for many parts of #version 300 already, but for now, we restrict its + // usage in runtime effects to just #version 100. + return false; + } + if (const SkSL::RP::Program* program = fEffect->getRPProgram()) { + SkSpan uniforms = uniforms_as_span(fEffect->uniforms(), + fUniforms, + rec.fDstCS, + rec.fAlloc); + SkShaderBase::MatrixRec matrix(SkMatrix::I()); + matrix.markCTMApplied(); + RuntimeEffectRPCallbacks callbacks(rec, matrix, fChildren, fEffect->fSampleUsages); + bool success = program->appendStages(rec.fPipeline, rec.fAlloc, &callbacks, uniforms); + return success; + } +#endif + return false; + } + + skvm::Color onProgram(skvm::Builder* p, skvm::Color c, + const SkColorInfo& colorInfo, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc) const override { + SkASSERT(SkRuntimeEffectPriv::CanDraw(SkCapabilities::RasterBackend().get(), + fEffect.get())); + + sk_sp inputs = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + fUniforms, + colorInfo.colorSpace()); + SkASSERT(inputs); + + SkShaderBase::MatrixRec mRec(SkMatrix::I()); + mRec.markTotalMatrixInvalid(); + RuntimeEffectVMCallbacks callbacks(p, uniforms, alloc, fChildren, mRec, c, colorInfo); + std::vector uniform = make_skvm_uniforms(p, uniforms, fEffect->uniformSize(), + *inputs); + + // There should be no way for the color filter to use device coords, but we need to supply + // something. (Uninitialized values can trigger asserts in skvm::Builder). + skvm::Coord zeroCoord = { p->splat(0.0f), p->splat(0.0f) }; + return SkSL::ProgramToSkVM(*fEffect->fBaseProgram, fEffect->fMain, p,/*debugTrace=*/nullptr, + SkSpan(uniform), /*device=*/zeroCoord, /*local=*/zeroCoord, + c, c, &callbacks); + } + + SkPMColor4f onFilterColor4f(const SkPMColor4f& color, SkColorSpace* dstCS) const override { + // Get the generic program for filtering a single color + const SkFilterColorProgram* program = fEffect->getFilterColorProgram(); + if (!program) { + // We were unable to build a cached (per-effect) program. Use the base-class fallback, + // which builds a program for the specific filter instance. + return SkColorFilterBase::onFilterColor4f(color, dstCS); + } + + // Get our specific uniform values + sk_sp inputs = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + fUniforms, + dstCS); + SkASSERT(inputs); + + auto evalChild = [&](int index, SkPMColor4f inColor) { + const auto& child = fChildren[index]; + + // SkFilterColorProgram::Make has guaranteed that any children will be color filters. + SkASSERT(!child.shader()); + SkASSERT(!child.blender()); + if (SkColorFilter* colorFilter = child.colorFilter()) { + return as_CFB(colorFilter)->onFilterColor4f(inColor, dstCS); + } + return inColor; + }; + + return program->eval(color, inputs->data(), evalChild); + } + + bool onIsAlphaUnchanged() const override { + return fEffect->getFilterColorProgram() && + fEffect->getFilterColorProgram()->isAlphaUnchanged(); + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeString(fEffect->source().c_str()); + buffer.writeDataAsByteArray(fUniforms.get()); + write_child_effects(buffer, fChildren); + } + + SkRuntimeEffect* asRuntimeEffect() const override { return fEffect.get(); } + + SK_FLATTENABLE_HOOKS(SkRuntimeColorFilter) + +private: + sk_sp fEffect; + sk_sp fUniforms; + std::vector fChildren; +}; + +sk_sp SkRuntimeColorFilter::CreateProc(SkReadBuffer& buffer) { + SkString sksl; + buffer.readString(&sksl); + sk_sp uniforms = buffer.readByteArrayAsData(); + + auto effect = SkMakeCachedRuntimeEffect(SkRuntimeEffect::MakeForColorFilter, std::move(sksl)); +#if !SK_LENIENT_SKSL_DESERIALIZATION + if (!buffer.validate(effect != nullptr)) { + return nullptr; + } +#endif + + SkSTArray<4, SkRuntimeEffect::ChildPtr> children; + if (!read_child_effects(buffer, effect.get(), &children)) { + return nullptr; + } + +#if SK_LENIENT_SKSL_DESERIALIZATION + if (!effect) { + SkDebugf("Serialized SkSL failed to compile. Ignoring/dropping SkSL color filter.\n"); + return nullptr; + } +#endif + + return effect->makeColorFilter(std::move(uniforms), SkSpan(children)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +using UniformsCallback = SkRuntimeEffectPriv::UniformsCallback; + +class SkRTShader : public SkShaderBase { +public: + SkRTShader(sk_sp effect, + sk_sp debugTrace, + sk_sp uniforms, + SkSpan children) + : fEffect(std::move(effect)) + , fDebugTrace(std::move(debugTrace)) + , fUniformData(std::move(uniforms)) + , fChildren(children.begin(), children.end()) {} + + SkRTShader(sk_sp effect, + sk_sp debugTrace, + UniformsCallback uniformsCallback, + SkSpan children) + : fEffect(std::move(effect)) + , fDebugTrace(std::move(debugTrace)) + , fUniformsCallback(std::move(uniformsCallback)) + , fChildren(children.begin(), children.end()) {} + + SkRuntimeEffect::TracedShader makeTracedClone(const SkIPoint& coord) { + sk_sp unoptimized = fEffect->makeUnoptimizedClone(); + sk_sp debugTrace = make_skvm_debug_trace(unoptimized.get(), coord); + auto debugShader = sk_make_sp( + unoptimized, debugTrace, this->uniformData(nullptr), SkSpan(fChildren)); + + return SkRuntimeEffect::TracedShader{std::move(debugShader), std::move(debugTrace)}; + } + + bool isOpaque() const override { return fEffect->alwaysOpaque(); } + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs& args, + const MatrixRec& mRec) const override { + if (!SkRuntimeEffectPriv::CanDraw(args.fContext->priv().caps(), fEffect.get())) { + return nullptr; + } + + sk_sp uniforms = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + this->uniformData(args.fDstColorInfo->colorSpace()), + args.fDstColorInfo->colorSpace()); + SkASSERT(uniforms); + + bool success; + std::unique_ptr fp; + std::tie(success, fp) = make_effect_fp(fEffect, + "runtime_shader", + std::move(uniforms), + /*inputFP=*/nullptr, + /*destColorFP=*/nullptr, + SkSpan(fChildren), + args); + if (!success) { + return nullptr; + } + + std::tie(success, fp) = mRec.apply(std::move(fp)); + if (!success) { + return nullptr; + } + return fp; + } +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const override { + using namespace skgpu::graphite; + + sk_sp uniforms = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + this->uniformData(keyContext.dstColorInfo().colorSpace()), + keyContext.dstColorInfo().colorSpace()); + SkASSERT(uniforms); + + RuntimeEffectBlock::BeginBlock(keyContext, builder, gatherer, + { fEffect, std::move(uniforms) }); + + add_children_to_key(fChildren, fEffect->children(), keyContext, builder, gatherer); + + builder->endBlock(); + } +#endif + + bool appendStages(const SkStageRec& rec, const MatrixRec& mRec) const override { +#ifdef SK_ENABLE_SKSL_IN_RASTER_PIPELINE + if (!SkRuntimeEffectPriv::CanDraw(SkCapabilities::RasterBackend().get(), fEffect.get())) { + // SkRP has support for many parts of #version 300 already, but for now, we restrict its + // usage in runtime effects to just #version 100. + return false; + } + if (fDebugTrace) { + // SkRP doesn't support debug traces yet; fall back to SkVM until this is implemented. + return false; + } + if (const SkSL::RP::Program* program = fEffect->getRPProgram()) { + std::optional newMRec = mRec.apply(rec); + if (!newMRec.has_value()) { + return false; + } + SkSpan uniforms = uniforms_as_span(fEffect->uniforms(), + this->uniformData(rec.fDstCS), + rec.fDstCS, + rec.fAlloc); + RuntimeEffectRPCallbacks callbacks(rec, *newMRec, fChildren, fEffect->fSampleUsages); + bool success = program->appendStages(rec.fPipeline, rec.fAlloc, &callbacks, uniforms); + return success; + } +#endif + return false; + } + + skvm::Color program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& colorInfo, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override { + if (!SkRuntimeEffectPriv::CanDraw(SkCapabilities::RasterBackend().get(), fEffect.get())) { + return {}; + } + + sk_sp inputs = + SkRuntimeEffectPriv::TransformUniforms(fEffect->uniforms(), + this->uniformData(colorInfo.colorSpace()), + colorInfo.colorSpace()); + SkASSERT(inputs); + + // Ensure any pending transform is applied before running the runtime shader's code, which + // gets to use and manipulate the coordinates. + std::optional newMRec = mRec.apply(p, &local, uniforms); + if (!newMRec.has_value()) { + return {}; + } + // We could omit this for children that are only sampled with passthrough coords. + newMRec->markTotalMatrixInvalid(); + + RuntimeEffectVMCallbacks callbacks(p, + uniforms, + alloc, + fChildren, + *newMRec, + paint, + colorInfo); + std::vector uniform = make_skvm_uniforms(p, uniforms, fEffect->uniformSize(), + *inputs); + + return SkSL::ProgramToSkVM(*fEffect->fBaseProgram, fEffect->fMain, p, fDebugTrace.get(), + SkSpan(uniform), device, local, paint, paint, &callbacks); + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeString(fEffect->source().c_str()); + buffer.writeDataAsByteArray(this->uniformData(nullptr).get()); + write_child_effects(buffer, fChildren); + } + + SkRuntimeEffect* asRuntimeEffect() const override { return fEffect.get(); } + + SK_FLATTENABLE_HOOKS(SkRTShader) + +private: + enum Flags { + kHasLegacyLocalMatrix_Flag = 1 << 1, + }; + + sk_sp uniformData(const SkColorSpace* dstCS) const { + if (fUniformData) { + return fUniformData; + } + + SkASSERT(fUniformsCallback); + sk_sp uniforms = fUniformsCallback({dstCS}); + SkASSERT(uniforms && uniforms->size() == fEffect->uniformSize()); + return uniforms; + } + + sk_sp fEffect; + sk_sp fDebugTrace; + sk_sp fUniformData; + UniformsCallback fUniformsCallback; + std::vector fChildren; +}; + +sk_sp SkRTShader::CreateProc(SkReadBuffer& buffer) { + SkString sksl; + buffer.readString(&sksl); + sk_sp uniforms = buffer.readByteArrayAsData(); + + SkTLazy localM; + if (buffer.isVersionLT(SkPicturePriv::kNoShaderLocalMatrix)) { + uint32_t flags = buffer.read32(); + if (flags & kHasLegacyLocalMatrix_Flag) { + buffer.readMatrix(localM.init()); + } + } + + auto effect = SkMakeCachedRuntimeEffect(SkRuntimeEffect::MakeForShader, std::move(sksl)); +#if !SK_LENIENT_SKSL_DESERIALIZATION + if (!buffer.validate(effect != nullptr)) { + return nullptr; + } +#endif + + SkSTArray<4, SkRuntimeEffect::ChildPtr> children; + if (!read_child_effects(buffer, effect.get(), &children)) { + return nullptr; + } + +#if SK_LENIENT_SKSL_DESERIALIZATION + if (!effect) { + // If any children were SkShaders, return the first one. This is a reasonable fallback. + for (int i = 0; i < children.size(); i++) { + if (children[i].shader()) { + SkDebugf("Serialized SkSL failed to compile. Replacing shader with child %d.\n", i); + return sk_ref_sp(children[i].shader()); + } + } + + // We don't know what to do, so just return nullptr (but *don't* poison the buffer). + SkDebugf("Serialized SkSL failed to compile. Ignoring/dropping SkSL shader.\n"); + return nullptr; + } +#endif + + return effect->makeShader(std::move(uniforms), SkSpan(children), localM.getMaybeNull()); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +class SkRuntimeBlender : public SkBlenderBase { +public: + SkRuntimeBlender(sk_sp effect, + sk_sp uniforms, + SkSpan children) + : fEffect(std::move(effect)) + , fUniforms(std::move(uniforms)) + , fChildren(children.begin(), children.end()) {} + + SkRuntimeEffect* asRuntimeEffect() const override { return fEffect.get(); } + + bool onAppendStages(const SkStageRec& rec) const override { +#ifdef SK_ENABLE_SKSL_IN_RASTER_PIPELINE + if (!SkRuntimeEffectPriv::CanDraw(SkCapabilities::RasterBackend().get(), fEffect.get())) { + // SkRP has support for many parts of #version 300 already, but for now, we restrict its + // usage in runtime effects to just #version 100. + return false; + } + if (const SkSL::RP::Program* program = fEffect->getRPProgram()) { + SkSpan uniforms = uniforms_as_span(fEffect->uniforms(), + fUniforms, + rec.fDstCS, + rec.fAlloc); + SkShaderBase::MatrixRec matrix(SkMatrix::I()); + matrix.markCTMApplied(); + RuntimeEffectRPCallbacks callbacks(rec, matrix, fChildren, fEffect->fSampleUsages); + bool success = program->appendStages(rec.fPipeline, rec.fAlloc, &callbacks, uniforms); + return success; + } +#endif + return false; + } + + skvm::Color onProgram(skvm::Builder* p, skvm::Color src, skvm::Color dst, + const SkColorInfo& colorInfo, skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override { + if (!SkRuntimeEffectPriv::CanDraw(SkCapabilities::RasterBackend().get(), fEffect.get())) { + return {}; + } + + sk_sp inputs = SkRuntimeEffectPriv::TransformUniforms(fEffect->uniforms(), + fUniforms, + colorInfo.colorSpace()); + SkASSERT(inputs); + + SkShaderBase::MatrixRec mRec(SkMatrix::I()); + mRec.markTotalMatrixInvalid(); + RuntimeEffectVMCallbacks callbacks(p, uniforms, alloc, fChildren, mRec, src, colorInfo); + std::vector uniform = make_skvm_uniforms(p, uniforms, fEffect->uniformSize(), + *inputs); + + // Emit the blend function as an SkVM program. + skvm::Coord zeroCoord = {p->splat(0.0f), p->splat(0.0f)}; + return SkSL::ProgramToSkVM(*fEffect->fBaseProgram, fEffect->fMain, p,/*debugTrace=*/nullptr, + SkSpan(uniform), /*device=*/zeroCoord, /*local=*/zeroCoord, + src, dst, &callbacks); + } + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor( + std::unique_ptr srcFP, + std::unique_ptr dstFP, + const GrFPArgs& args) const override { + if (!SkRuntimeEffectPriv::CanDraw(args.fContext->priv().caps(), fEffect.get())) { + return nullptr; + } + + sk_sp uniforms = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + fUniforms, + args.fDstColorInfo->colorSpace()); + SkASSERT(uniforms); + auto [success, fp] = make_effect_fp(fEffect, + "runtime_blender", + std::move(uniforms), + std::move(srcFP), + std::move(dstFP), + SkSpan(fChildren), + args); + + return success ? std::move(fp) : nullptr; + } +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer, + skgpu::graphite::DstColorType dstColorType) const override { + using namespace skgpu::graphite; + SkASSERT(dstColorType == DstColorType::kSurface || + dstColorType == DstColorType::kChildOutput); + + sk_sp uniforms = SkRuntimeEffectPriv::TransformUniforms( + fEffect->uniforms(), + fUniforms, + keyContext.dstColorInfo().colorSpace()); + SkASSERT(uniforms); + + // TODO(b/238757201): Pass into RuntimeEffectBlock::BeginBlock that this runtime effect + // needs a dst read, if dstColorType == kSurface. + RuntimeEffectBlock::BeginBlock(keyContext, builder, gatherer, + { fEffect, std::move(uniforms) }); + + add_children_to_key(fChildren, fEffect->children(), keyContext, builder, gatherer); + + builder->endBlock(); + } +#endif + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeString(fEffect->source().c_str()); + buffer.writeDataAsByteArray(fUniforms.get()); + write_child_effects(buffer, fChildren); + } + + SK_FLATTENABLE_HOOKS(SkRuntimeBlender) + +private: + using INHERITED = SkBlenderBase; + + sk_sp fEffect; + sk_sp fUniforms; + std::vector fChildren; +}; + +sk_sp SkRuntimeBlender::CreateProc(SkReadBuffer& buffer) { + SkString sksl; + buffer.readString(&sksl); + sk_sp uniforms = buffer.readByteArrayAsData(); + + auto effect = SkMakeCachedRuntimeEffect(SkRuntimeEffect::MakeForBlender, std::move(sksl)); +#if !SK_LENIENT_SKSL_DESERIALIZATION + if (!buffer.validate(effect != nullptr)) { + return nullptr; + } +#endif + + SkSTArray<4, SkRuntimeEffect::ChildPtr> children; + if (!read_child_effects(buffer, effect.get(), &children)) { + return nullptr; + } + +#if SK_LENIENT_SKSL_DESERIALIZATION + if (!effect) { + SkDebugf("Serialized SkSL failed to compile. Ignoring/dropping SkSL blender.\n"); + return nullptr; + } +#endif + + return effect->makeBlender(std::move(uniforms), SkSpan(children)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkRuntimeEffectPriv::MakeDeferredShader(const SkRuntimeEffect* effect, + UniformsCallback uniformsCallback, + SkSpan children, + const SkMatrix* localMatrix) { + if (!effect->allowShader()) { + return nullptr; + } + if (!verify_child_effects(effect->fChildren, children)) { + return nullptr; + } + if (!uniformsCallback) { + return nullptr; + } + return SkLocalMatrixShader::MakeWrapped(localMatrix, + sk_ref_sp(effect), + /*debugTrace=*/nullptr, + std::move(uniformsCallback), + children); +} + +sk_sp SkRuntimeEffect::makeShader(sk_sp uniforms, + sk_sp childShaders[], + size_t childCount, + const SkMatrix* localMatrix) const { + SkSTArray<4, ChildPtr> children(childCount); + for (size_t i = 0; i < childCount; ++i) { + children.emplace_back(childShaders[i]); + } + return this->makeShader(std::move(uniforms), SkSpan(children), localMatrix); +} + +sk_sp SkRuntimeEffect::makeShader(sk_sp uniforms, + SkSpan children, + const SkMatrix* localMatrix) const { + if (!this->allowShader()) { + return nullptr; + } + if (!verify_child_effects(fChildren, children)) { + return nullptr; + } + if (!uniforms) { + uniforms = SkData::MakeEmpty(); + } + if (uniforms->size() != this->uniformSize()) { + return nullptr; + } + return SkLocalMatrixShader::MakeWrapped(localMatrix, + sk_ref_sp(this), + /*debugTrace=*/nullptr, + std::move(uniforms), + children); +} + +sk_sp SkRuntimeEffect::makeImage(GrRecordingContext* rContext, + sk_sp uniforms, + SkSpan children, + const SkMatrix* localMatrix, + SkImageInfo resultInfo, + bool mipmapped) const { + if (resultInfo.alphaType() == kUnpremul_SkAlphaType || + resultInfo.alphaType() == kUnknown_SkAlphaType) { + return nullptr; + } + sk_sp surface; + if (rContext) { +#if defined(SK_GANESH) + if (!rContext->priv().caps()->mipmapSupport()) { + mipmapped = false; + } + surface = SkSurface::MakeRenderTarget(rContext, + skgpu::Budgeted::kYes, + resultInfo, + 1, + kTopLeft_GrSurfaceOrigin, + nullptr, + mipmapped); +#endif + } else { + surface = SkSurface::MakeRaster(resultInfo); + } + if (!surface) { + return nullptr; + } + SkCanvas* canvas = surface->getCanvas(); + auto shader = this->makeShader(std::move(uniforms), children, localMatrix); + if (!shader) { + return nullptr; + } + SkPaint paint; + paint.setShader(std::move(shader)); + paint.setBlendMode(SkBlendMode::kSrc); + canvas->drawPaint(paint); + return surface->makeImageSnapshot(); +} + +sk_sp SkRuntimeEffect::makeColorFilter(sk_sp uniforms, + sk_sp childColorFilters[], + size_t childCount) const { + SkSTArray<4, ChildPtr> children(childCount); + for (size_t i = 0; i < childCount; ++i) { + children.emplace_back(childColorFilters[i]); + } + return this->makeColorFilter(std::move(uniforms), SkSpan(children)); +} + +sk_sp SkRuntimeEffect::makeColorFilter(sk_sp uniforms, + SkSpan children) const { + if (!this->allowColorFilter()) { + return nullptr; + } + if (!verify_child_effects(fChildren, children)) { + return nullptr; + } + if (!uniforms) { + uniforms = SkData::MakeEmpty(); + } + if (uniforms->size() != this->uniformSize()) { + return nullptr; + } + return sk_make_sp(sk_ref_sp(this), std::move(uniforms), children); +} + +sk_sp SkRuntimeEffect::makeColorFilter(sk_sp uniforms) const { + return this->makeColorFilter(std::move(uniforms), /*children=*/{}); +} + +sk_sp SkRuntimeEffect::makeBlender(sk_sp uniforms, + SkSpan children) const { + if (!this->allowBlender()) { + return nullptr; + } + if (!verify_child_effects(fChildren, children)) { + return nullptr; + } + if (!uniforms) { + uniforms = SkData::MakeEmpty(); + } + if (uniforms->size() != this->uniformSize()) { + return nullptr; + } + return sk_make_sp(sk_ref_sp(this), std::move(uniforms), children); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkRuntimeEffect::TracedShader SkRuntimeEffect::MakeTraced(sk_sp shader, + const SkIPoint& traceCoord) { + SkRuntimeEffect* effect = as_SB(shader)->asRuntimeEffect(); + if (!effect) { + return TracedShader{nullptr, nullptr}; + } + // An SkShader with an attached SkRuntimeEffect must be an SkRTShader. + SkRTShader* rtShader = static_cast(shader.get()); + return rtShader->makeTracedClone(traceCoord); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +std::optional SkRuntimeEffect::ChildPtr::type() const { + if (fChild) { + switch (fChild->getFlattenableType()) { + case SkFlattenable::kSkShader_Type: + return ChildType::kShader; + case SkFlattenable::kSkColorFilter_Type: + return ChildType::kColorFilter; + case SkFlattenable::kSkBlender_Type: + return ChildType::kBlender; + default: + break; + } + } + return std::nullopt; +} + +SkShader* SkRuntimeEffect::ChildPtr::shader() const { + return (fChild && fChild->getFlattenableType() == SkFlattenable::kSkShader_Type) + ? static_cast(fChild.get()) + : nullptr; +} + +SkColorFilter* SkRuntimeEffect::ChildPtr::colorFilter() const { + return (fChild && fChild->getFlattenableType() == SkFlattenable::kSkColorFilter_Type) + ? static_cast(fChild.get()) + : nullptr; +} + +SkBlender* SkRuntimeEffect::ChildPtr::blender() const { + return (fChild && fChild->getFlattenableType() == SkFlattenable::kSkBlender_Type) + ? static_cast(fChild.get()) + : nullptr; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkRuntimeEffect::RegisterFlattenables() { + SK_REGISTER_FLATTENABLE(SkRuntimeColorFilter); + SK_REGISTER_FLATTENABLE(SkRTShader); + SK_REGISTER_FLATTENABLE(SkRuntimeBlender); +} + +SkRuntimeShaderBuilder::SkRuntimeShaderBuilder(sk_sp effect) + : INHERITED(std::move(effect)) {} + +SkRuntimeShaderBuilder::~SkRuntimeShaderBuilder() = default; + +sk_sp SkRuntimeShaderBuilder::makeImage(GrRecordingContext* recordingContext, + const SkMatrix* localMatrix, + SkImageInfo resultInfo, + bool mipmapped) { + return this->effect()->makeImage(recordingContext, + this->uniforms(), + this->children(), + localMatrix, + resultInfo, + mipmapped); +} + +sk_sp SkRuntimeShaderBuilder::makeShader(const SkMatrix* localMatrix) { + return this->effect()->makeShader(this->uniforms(), this->children(), localMatrix); +} + +SkRuntimeBlendBuilder::SkRuntimeBlendBuilder(sk_sp effect) + : INHERITED(std::move(effect)) {} + +SkRuntimeBlendBuilder::~SkRuntimeBlendBuilder() = default; + +sk_sp SkRuntimeBlendBuilder::makeBlender() { + return this->effect()->makeBlender(this->uniforms(), this->children()); +} + +SkRuntimeColorFilterBuilder::SkRuntimeColorFilterBuilder(sk_sp effect) + : INHERITED(std::move(effect)) {} + +SkRuntimeColorFilterBuilder::~SkRuntimeColorFilterBuilder() = default; + +sk_sp SkRuntimeColorFilterBuilder::makeColorFilter() { + return this->effect()->makeColorFilter(this->uniforms(), this->children()); +} + +#endif // SK_ENABLE_SKSL diff --git a/gfx/skia/skia/src/core/SkRuntimeEffectPriv.h b/gfx/skia/skia/src/core/SkRuntimeEffectPriv.h new file mode 100644 index 0000000000..46264adbe2 --- /dev/null +++ b/gfx/skia/skia/src/core/SkRuntimeEffectPriv.h @@ -0,0 +1,176 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRuntimeEffectPriv_DEFINED +#define SkRuntimeEffectPriv_DEFINED + +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkColorData.h" +#include "src/core/SkVM.h" + +#include + +#ifdef SK_ENABLE_SKSL + +namespace SkSL { +class Context; +class Variable; +struct Program; +} + +class SkCapabilities; +struct SkColorSpaceXformSteps; + +class SkRuntimeEffectPriv { +public: + struct UniformsCallbackContext { + const SkColorSpace* fDstColorSpace; + }; + + // Private (experimental) API for creating runtime shaders with late-bound uniforms. + // The callback must produce a uniform data blob of the correct size for the effect. + // It is invoked at "draw" time (essentially, when a draw call is made against the canvas + // using the resulting shader). There are no strong guarantees about timing. + // Serializing the resulting shader will immediately invoke the callback (and record the + // resulting uniforms). + using UniformsCallback = std::function(const UniformsCallbackContext&)>; + static sk_sp MakeDeferredShader(const SkRuntimeEffect* effect, + UniformsCallback uniformsCallback, + SkSpan children, + const SkMatrix* localMatrix = nullptr); + + // Helper function when creating an effect for a GrSkSLFP that verifies an effect will + // implement the constant output for constant input optimization flag. + static bool SupportsConstantOutputForConstantInput(const SkRuntimeEffect* effect) { + return effect->getFilterColorProgram(); + } + + static uint32_t Hash(const SkRuntimeEffect& effect) { + return effect.hash(); + } + + static const SkSL::Program& Program(const SkRuntimeEffect& effect) { + return *effect.fBaseProgram; + } + + static SkRuntimeEffect::Options ES3Options() { + SkRuntimeEffect::Options options; + options.maxVersionAllowed = SkSL::Version::k300; + return options; + } + + static void AllowPrivateAccess(SkRuntimeEffect::Options* options) { + options->allowPrivateAccess = true; + } + + static SkRuntimeEffect::Uniform VarAsUniform(const SkSL::Variable&, + const SkSL::Context&, + size_t* offset); + + // If there are layout(color) uniforms then this performs color space transformation on the + // color values and returns a new SkData. Otherwise, the original data is returned. + static sk_sp TransformUniforms(SkSpan uniforms, + sk_sp originalData, + const SkColorSpaceXformSteps&); + static sk_sp TransformUniforms(SkSpan uniforms, + sk_sp originalData, + const SkColorSpace* dstCS); + + static bool CanDraw(const SkCapabilities*, const SkSL::Program*); + static bool CanDraw(const SkCapabilities*, const SkRuntimeEffect*); +}; + +// These internal APIs for creating runtime effects vary from the public API in two ways: +// +// 1) they're used in contexts where it's not useful to receive an error message; +// 2) they're cached. +// +// Users of the public SkRuntimeEffect::Make*() can of course cache however they like themselves; +// keeping these APIs private means users will not be forced into our cache or cache policy. + +sk_sp SkMakeCachedRuntimeEffect( + SkRuntimeEffect::Result (*make)(SkString sksl, const SkRuntimeEffect::Options&), + SkString sksl); + +inline sk_sp SkMakeCachedRuntimeEffect( + SkRuntimeEffect::Result (*make)(SkString, const SkRuntimeEffect::Options&), + const char* sksl) { + return SkMakeCachedRuntimeEffect(make, SkString{sksl}); +} + +// Internal API that assumes (and asserts) that the shader code is valid, but does no internal +// caching. Used when the caller will cache the result in a static variable. Ownership is passed to +// the caller; the effect will be leaked if it the pointer is not stored or explicitly deleted. +inline SkRuntimeEffect* SkMakeRuntimeEffect( + SkRuntimeEffect::Result (*make)(SkString, const SkRuntimeEffect::Options&), + const char* sksl, + SkRuntimeEffect::Options options = SkRuntimeEffect::Options{}) { +#if defined(SK_DEBUG) + // Our SKSL snippets we embed in Skia should not have comments or excess indentation. + // Removing them helps trim down code size and speeds up parsing + if (SkStrContains(sksl, "//") || SkStrContains(sksl, " ")) { + SkDEBUGFAILF("Found SkSL snippet that can be minified: \n %s\n", sksl); + } +#endif + SkRuntimeEffectPriv::AllowPrivateAccess(&options); + auto result = make(SkString{sksl}, options); + if (!result.effect) { + SK_ABORT("%s", result.errorText.c_str()); + } + return result.effect.release(); +} + +/** + * Runtime effects are often long lived & cached. Individual color filters or FPs created from them + * and are often short-lived. However, color filters and FPs may need to operate on a single color + * (on the CPU). This may be done at the paint level (eg, filter the paint color), or as part of + * FP tree analysis. + * + * SkFilterColorProgram is an skvm program representing a (color filter) SkRuntimeEffect. It can + * process a single color, without knowing the details of a particular instance (uniform values or + * children). + */ +class SkFilterColorProgram { +public: + static std::unique_ptr Make(const SkRuntimeEffect* effect); + + SkPMColor4f eval(const SkPMColor4f& inColor, + const void* uniformData, + std::function evalChild) const; + + bool isAlphaUnchanged() const { return fAlphaUnchanged; } + +private: + struct SampleCall { + enum class Kind { + kInputColor, // eg child.eval(inputColor) + kImmediate, // eg child.eval(half4(1)) + kPrevious, // eg child1.eval(child2.eval(...)) + kUniform, // eg uniform half4 color; ... child.eval(color) + }; + + int fChild; + Kind fKind; + union { + SkPMColor4f fImm; // for kImmediate + int fPrevious; // for kPrevious + int fOffset; // for kUniform + }; + }; + + SkFilterColorProgram(skvm::Program program, + std::vector sampleCalls, + bool alphaUnchanged); + + skvm::Program fProgram; + std::vector fSampleCalls; + bool fAlphaUnchanged; +}; + +#endif // SK_ENABLE_SKSL + +#endif // SkRuntimeEffectPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkSLTypeShared.cpp b/gfx/skia/skia/src/core/SkSLTypeShared.cpp new file mode 100644 index 0000000000..847c4c46d3 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSLTypeShared.cpp @@ -0,0 +1,213 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkSLTypeShared.h" + +const char* SkSLTypeString(SkSLType t) { + switch (t) { + case SkSLType::kVoid: return "void"; + case SkSLType::kBool: return "bool"; + case SkSLType::kBool2: return "bool2"; + case SkSLType::kBool3: return "bool3"; + case SkSLType::kBool4: return "bool4"; + case SkSLType::kShort: return "short"; + case SkSLType::kShort2: return "short2"; + case SkSLType::kShort3: return "short3"; + case SkSLType::kShort4: return "short4"; + case SkSLType::kUShort: return "ushort"; + case SkSLType::kUShort2: return "ushort2"; + case SkSLType::kUShort3: return "ushort3"; + case SkSLType::kUShort4: return "ushort4"; + case SkSLType::kFloat: return "float"; + case SkSLType::kFloat2: return "float2"; + case SkSLType::kFloat3: return "float3"; + case SkSLType::kFloat4: return "float4"; + case SkSLType::kFloat2x2: return "float2x2"; + case SkSLType::kFloat3x3: return "float3x3"; + case SkSLType::kFloat4x4: return "float4x4"; + case SkSLType::kHalf: return "half"; + case SkSLType::kHalf2: return "half2"; + case SkSLType::kHalf3: return "half3"; + case SkSLType::kHalf4: return "half4"; + case SkSLType::kHalf2x2: return "half2x2"; + case SkSLType::kHalf3x3: return "half3x3"; + case SkSLType::kHalf4x4: return "half4x4"; + case SkSLType::kInt: return "int"; + case SkSLType::kInt2: return "int2"; + case SkSLType::kInt3: return "int3"; + case SkSLType::kInt4: return "int4"; + case SkSLType::kUInt: return "uint"; + case SkSLType::kUInt2: return "uint2"; + case SkSLType::kUInt3: return "uint3"; + case SkSLType::kUInt4: return "uint4"; + case SkSLType::kTexture2DSampler: return "sampler2D"; + case SkSLType::kTextureExternalSampler: return "samplerExternalOES"; + case SkSLType::kTexture2DRectSampler: return "sampler2DRect"; + case SkSLType::kTexture2D: return "texture2D"; + case SkSLType::kSampler: return "sampler"; + case SkSLType::kInput: return "subpassInput"; + } + SkUNREACHABLE; +} + +/** Is the shading language type full precision? */ +bool SkSLTypeIsFullPrecisionNumericType(SkSLType type) { + switch (type) { + // Half-precision types: + case SkSLType::kShort: + case SkSLType::kShort2: + case SkSLType::kShort3: + case SkSLType::kShort4: + case SkSLType::kUShort: + case SkSLType::kUShort2: + case SkSLType::kUShort3: + case SkSLType::kUShort4: + case SkSLType::kHalf: + case SkSLType::kHalf2: + case SkSLType::kHalf3: + case SkSLType::kHalf4: + case SkSLType::kHalf2x2: + case SkSLType::kHalf3x3: + case SkSLType::kHalf4x4: + // Non-numeric types: + case SkSLType::kVoid: + case SkSLType::kTexture2DSampler: + case SkSLType::kTextureExternalSampler: + case SkSLType::kTexture2DRectSampler: + case SkSLType::kTexture2D: + case SkSLType::kSampler: + case SkSLType::kInput: + case SkSLType::kBool: + case SkSLType::kBool2: + case SkSLType::kBool3: + case SkSLType::kBool4: + return false; + + // Full-precision numeric types: + case SkSLType::kInt: + case SkSLType::kInt2: + case SkSLType::kInt3: + case SkSLType::kInt4: + case SkSLType::kUInt: + case SkSLType::kUInt2: + case SkSLType::kUInt3: + case SkSLType::kUInt4: + case SkSLType::kFloat: + case SkSLType::kFloat2: + case SkSLType::kFloat3: + case SkSLType::kFloat4: + case SkSLType::kFloat2x2: + case SkSLType::kFloat3x3: + case SkSLType::kFloat4x4: + return true; + } + SkUNREACHABLE; +} + +int SkSLTypeMatrixSize(SkSLType type) { + switch (type) { + case SkSLType::kFloat2x2: + case SkSLType::kHalf2x2: + return 2; + + case SkSLType::kFloat3x3: + case SkSLType::kHalf3x3: + return 3; + + case SkSLType::kFloat4x4: + case SkSLType::kHalf4x4: + return 4; + + case SkSLType::kFloat: + case SkSLType::kHalf: + case SkSLType::kBool: + case SkSLType::kShort: + case SkSLType::kUShort: + case SkSLType::kInt: + case SkSLType::kUInt: + case SkSLType::kFloat2: + case SkSLType::kHalf2: + case SkSLType::kBool2: + case SkSLType::kShort2: + case SkSLType::kUShort2: + case SkSLType::kInt2: + case SkSLType::kUInt2: + case SkSLType::kFloat3: + case SkSLType::kHalf3: + case SkSLType::kBool3: + case SkSLType::kShort3: + case SkSLType::kUShort3: + case SkSLType::kInt3: + case SkSLType::kUInt3: + case SkSLType::kFloat4: + case SkSLType::kHalf4: + case SkSLType::kBool4: + case SkSLType::kShort4: + case SkSLType::kUShort4: + case SkSLType::kInt4: + case SkSLType::kUInt4: + case SkSLType::kVoid: + case SkSLType::kTexture2DSampler: + case SkSLType::kTextureExternalSampler: + case SkSLType::kTexture2DRectSampler: + case SkSLType::kTexture2D: + case SkSLType::kSampler: + case SkSLType::kInput: + return -1; + } + SkUNREACHABLE; +} + +bool SkSLTypeIsCombinedSamplerType(SkSLType type) { + switch (type) { + case SkSLType::kTexture2DRectSampler: + case SkSLType::kTexture2DSampler: + case SkSLType::kTextureExternalSampler: + return true; + + case SkSLType::kVoid: + case SkSLType::kFloat: + case SkSLType::kFloat2: + case SkSLType::kFloat3: + case SkSLType::kFloat4: + case SkSLType::kFloat2x2: + case SkSLType::kFloat3x3: + case SkSLType::kFloat4x4: + case SkSLType::kHalf: + case SkSLType::kHalf2: + case SkSLType::kHalf3: + case SkSLType::kHalf4: + case SkSLType::kHalf2x2: + case SkSLType::kHalf3x3: + case SkSLType::kHalf4x4: + case SkSLType::kInt: + case SkSLType::kInt2: + case SkSLType::kInt3: + case SkSLType::kInt4: + case SkSLType::kUInt: + case SkSLType::kUInt2: + case SkSLType::kUInt3: + case SkSLType::kUInt4: + case SkSLType::kBool: + case SkSLType::kBool2: + case SkSLType::kBool3: + case SkSLType::kBool4: + case SkSLType::kShort: + case SkSLType::kShort2: + case SkSLType::kShort3: + case SkSLType::kShort4: + case SkSLType::kUShort: + case SkSLType::kUShort2: + case SkSLType::kUShort3: + case SkSLType::kUShort4: + case SkSLType::kTexture2D: + case SkSLType::kSampler: + case SkSLType::kInput: + return false; + } + SkUNREACHABLE; +} diff --git a/gfx/skia/skia/src/core/SkSLTypeShared.h b/gfx/skia/skia/src/core/SkSLTypeShared.h new file mode 100644 index 0000000000..d4b49b32a9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSLTypeShared.h @@ -0,0 +1,242 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLTypeShared_DEFINED +#define SkSLTypeShared_DEFINED + +#include "include/core/SkTypes.h" + +/** + * Types of shader-language-specific boxed variables we can create. + */ +enum class SkSLType : char { + kVoid, + kBool, + kBool2, + kBool3, + kBool4, + kShort, + kShort2, + kShort3, + kShort4, + kUShort, + kUShort2, + kUShort3, + kUShort4, + kFloat, + kFloat2, + kFloat3, + kFloat4, + kFloat2x2, + kFloat3x3, + kFloat4x4, + kHalf, + kHalf2, + kHalf3, + kHalf4, + kHalf2x2, + kHalf3x3, + kHalf4x4, + kInt, + kInt2, + kInt3, + kInt4, + kUInt, + kUInt2, + kUInt3, + kUInt4, + kTexture2DSampler, + kTextureExternalSampler, + kTexture2DRectSampler, + kTexture2D, + kSampler, + kInput, + + kLast = kInput +}; +static const int kSkSLTypeCount = static_cast(SkSLType::kLast) + 1; + +/** Returns the SkSL typename for this type. */ +const char* SkSLTypeString(SkSLType t); + +/** Is the shading language type float (including vectors/matrices)? */ +static constexpr bool SkSLTypeIsFloatType(SkSLType type) { + switch (type) { + case SkSLType::kFloat: + case SkSLType::kFloat2: + case SkSLType::kFloat3: + case SkSLType::kFloat4: + case SkSLType::kFloat2x2: + case SkSLType::kFloat3x3: + case SkSLType::kFloat4x4: + case SkSLType::kHalf: + case SkSLType::kHalf2: + case SkSLType::kHalf3: + case SkSLType::kHalf4: + case SkSLType::kHalf2x2: + case SkSLType::kHalf3x3: + case SkSLType::kHalf4x4: + return true; + + case SkSLType::kVoid: + case SkSLType::kTexture2DSampler: + case SkSLType::kTextureExternalSampler: + case SkSLType::kTexture2DRectSampler: + case SkSLType::kBool: + case SkSLType::kBool2: + case SkSLType::kBool3: + case SkSLType::kBool4: + case SkSLType::kShort: + case SkSLType::kShort2: + case SkSLType::kShort3: + case SkSLType::kShort4: + case SkSLType::kUShort: + case SkSLType::kUShort2: + case SkSLType::kUShort3: + case SkSLType::kUShort4: + case SkSLType::kInt: + case SkSLType::kInt2: + case SkSLType::kInt3: + case SkSLType::kInt4: + case SkSLType::kUInt: + case SkSLType::kUInt2: + case SkSLType::kUInt3: + case SkSLType::kUInt4: + case SkSLType::kTexture2D: + case SkSLType::kSampler: + case SkSLType::kInput: + return false; + } + SkUNREACHABLE; +} + +/** Is the shading language type integral (including vectors)? */ +static constexpr bool SkSLTypeIsIntegralType(SkSLType type) { + switch (type) { + case SkSLType::kShort: + case SkSLType::kShort2: + case SkSLType::kShort3: + case SkSLType::kShort4: + case SkSLType::kUShort: + case SkSLType::kUShort2: + case SkSLType::kUShort3: + case SkSLType::kUShort4: + case SkSLType::kInt: + case SkSLType::kInt2: + case SkSLType::kInt3: + case SkSLType::kInt4: + case SkSLType::kUInt: + case SkSLType::kUInt2: + case SkSLType::kUInt3: + case SkSLType::kUInt4: + return true; + + case SkSLType::kFloat: + case SkSLType::kFloat2: + case SkSLType::kFloat3: + case SkSLType::kFloat4: + case SkSLType::kFloat2x2: + case SkSLType::kFloat3x3: + case SkSLType::kFloat4x4: + case SkSLType::kHalf: + case SkSLType::kHalf2: + case SkSLType::kHalf3: + case SkSLType::kHalf4: + case SkSLType::kHalf2x2: + case SkSLType::kHalf3x3: + case SkSLType::kHalf4x4: + case SkSLType::kVoid: + case SkSLType::kTexture2DSampler: + case SkSLType::kTextureExternalSampler: + case SkSLType::kTexture2DRectSampler: + case SkSLType::kBool: + case SkSLType::kBool2: + case SkSLType::kBool3: + case SkSLType::kBool4: + case SkSLType::kTexture2D: + case SkSLType::kSampler: + case SkSLType::kInput: + return false; + } + SkUNREACHABLE; +} + +/** If the type represents a single value or vector return the vector length; otherwise, -1. */ +static constexpr int SkSLTypeVecLength(SkSLType type) { + switch (type) { + case SkSLType::kFloat: + case SkSLType::kHalf: + case SkSLType::kBool: + case SkSLType::kShort: + case SkSLType::kUShort: + case SkSLType::kInt: + case SkSLType::kUInt: + return 1; + + case SkSLType::kFloat2: + case SkSLType::kHalf2: + case SkSLType::kBool2: + case SkSLType::kShort2: + case SkSLType::kUShort2: + case SkSLType::kInt2: + case SkSLType::kUInt2: + return 2; + + case SkSLType::kFloat3: + case SkSLType::kHalf3: + case SkSLType::kBool3: + case SkSLType::kShort3: + case SkSLType::kUShort3: + case SkSLType::kInt3: + case SkSLType::kUInt3: + return 3; + + case SkSLType::kFloat4: + case SkSLType::kHalf4: + case SkSLType::kBool4: + case SkSLType::kShort4: + case SkSLType::kUShort4: + case SkSLType::kInt4: + case SkSLType::kUInt4: + return 4; + + case SkSLType::kFloat2x2: + case SkSLType::kFloat3x3: + case SkSLType::kFloat4x4: + case SkSLType::kHalf2x2: + case SkSLType::kHalf3x3: + case SkSLType::kHalf4x4: + case SkSLType::kVoid: + case SkSLType::kTexture2DSampler: + case SkSLType::kTextureExternalSampler: + case SkSLType::kTexture2DRectSampler: + case SkSLType::kTexture2D: + case SkSLType::kSampler: + case SkSLType::kInput: + return -1; + } + SkUNREACHABLE; +} + +/** + * Is the shading language type supported as a uniform (ie, does it have a corresponding set + * function on GrGLSLProgramDataManager)? + */ +static constexpr bool SkSLTypeCanBeUniformValue(SkSLType type) { + return SkSLTypeIsFloatType(type) || SkSLTypeIsIntegralType(type); +} + +/** Is the shading language type full precision? */ +bool SkSLTypeIsFullPrecisionNumericType(SkSLType type); + +/** If the type represents a square matrix, return its size; otherwise, -1. */ +int SkSLTypeMatrixSize(SkSLType type); + +/** If the type represents a square matrix, return its size; otherwise, -1. */ +bool SkSLTypeIsCombinedSamplerType(SkSLType type); + +#endif // SkSLTypeShared_DEFINED diff --git a/gfx/skia/skia/src/core/SkSafeRange.h b/gfx/skia/skia/src/core/SkSafeRange.h new file mode 100644 index 0000000000..a8a944655c --- /dev/null +++ b/gfx/skia/skia/src/core/SkSafeRange.h @@ -0,0 +1,49 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSafeRange_DEFINED +#define SkSafeRange_DEFINED + +#include "include/core/SkTypes.h" + +#include + +// SkSafeRange always check that a series of operations are in-range. +// This check is sticky, so that if any one operation fails, the object will remember that and +// return false from ok(). + +class SkSafeRange { +public: + explicit operator bool() const { return fOK; } + + bool ok() const { return fOK; } + + // checks 0 <= value <= max. + // On success, returns value + // On failure, returns 0 and sets ok() to false + template T checkLE(uint64_t value, T max) { + SkASSERT(static_cast(max) >= 0); + if (value > static_cast(max)) { + fOK = false; + value = 0; + } + return static_cast(value); + } + + int checkGE(int value, int min) { + if (value < min) { + fOK = false; + value = min; + } + return value; + } + +private: + bool fOK = true; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkSamplingPriv.h b/gfx/skia/skia/src/core/SkSamplingPriv.h new file mode 100644 index 0000000000..1972a2016c --- /dev/null +++ b/gfx/skia/skia/src/core/SkSamplingPriv.h @@ -0,0 +1,77 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSamplingPriv_DEFINED +#define SkSamplingPriv_DEFINED + +#include "include/core/SkSamplingOptions.h" + +class SkReadBuffer; +class SkWriteBuffer; + +// Private copy of SkFilterQuality, just for legacy deserialization +// Matches values in SkFilterQuality +enum SkLegacyFQ { + kNone_SkLegacyFQ = 0, //!< nearest-neighbor; fastest but lowest quality + kLow_SkLegacyFQ = 1, //!< bilerp + kMedium_SkLegacyFQ = 2, //!< bilerp + mipmaps; good for down-scaling + kHigh_SkLegacyFQ = 3, //!< bicubic resampling; slowest but good quality + + kLast_SkLegacyFQ = kHigh_SkLegacyFQ, +}; + +// Matches values in SkSamplingOptions::MediumBehavior +enum SkMediumAs { + kNearest_SkMediumAs, + kLinear_SkMediumAs, +}; + +class SkSamplingPriv { +public: + static size_t FlatSize(const SkSamplingOptions& options) { + size_t size = sizeof(uint32_t); // maxAniso + if (!options.isAniso()) { + size += 3 * sizeof(uint32_t); // bool32 + [2 floats | 2 ints] + } + return size; + } + + // Returns true if the sampling can be ignored when the CTM is identity. + static bool NoChangeWithIdentityMatrix(const SkSamplingOptions& sampling) { + // If B == 0, the cubic resampler should have no effect for identity matrices + // https://entropymine.com/imageworsener/bicubic/ + // We assume aniso has no effect with an identity transform. + return !sampling.useCubic || sampling.cubic.B == 0; + } + + // Makes a fallback SkSamplingOptions for cases where anisotropic filtering is not allowed. + // anisotropic filtering can access mip levels if present, but we don't add mipmaps to non- + // mipmapped images when the user requests anisotropic. So we shouldn't fall back to a + // sampling that would trigger mip map creation. + static SkSamplingOptions AnisoFallback(bool imageIsMipped) { + auto mm = imageIsMipped ? SkMipmapMode::kLinear : SkMipmapMode::kNone; + return SkSamplingOptions(SkFilterMode::kLinear, mm); + } + + static SkSamplingOptions FromFQ(SkLegacyFQ fq, SkMediumAs behavior = kNearest_SkMediumAs) { + switch (fq) { + case kHigh_SkLegacyFQ: + return SkSamplingOptions(SkCubicResampler{1/3.0f, 1/3.0f}); + case kMedium_SkLegacyFQ: + return SkSamplingOptions(SkFilterMode::kLinear, + behavior == kNearest_SkMediumAs ? SkMipmapMode::kNearest + : SkMipmapMode::kLinear); + case kLow_SkLegacyFQ: + return SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kNone); + case kNone_SkLegacyFQ: + break; + } + return SkSamplingOptions(SkFilterMode::kNearest, SkMipmapMode::kNone); + } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkScalar.cpp b/gfx/skia/skia/src/core/SkScalar.cpp new file mode 100644 index 0000000000..316cae4ce7 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScalar.cpp @@ -0,0 +1,37 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkScalar.h" + +SkScalar SkScalarInterpFunc(SkScalar searchKey, const SkScalar keys[], + const SkScalar values[], int length) { + SkASSERT(length > 0); + SkASSERT(keys != nullptr); + SkASSERT(values != nullptr); +#ifdef SK_DEBUG + for (int i = 1; i < length; i++) { + SkASSERT(keys[i-1] <= keys[i]); + } +#endif + int right = 0; + while (right < length && keys[right] < searchKey) { + ++right; + } + // Could use sentinel values to eliminate conditionals, but since the + // tables are taken as input, a simpler format is better. + if (right == length) { + return values[length-1]; + } + if (right == 0) { + return values[0]; + } + // Otherwise, interpolate between right - 1 and right. + SkScalar leftKey = keys[right-1]; + SkScalar rightKey = keys[right]; + SkScalar fract = (searchKey - leftKey) / (rightKey - leftKey); + return SkScalarInterp(values[right-1], values[right], fract); +} diff --git a/gfx/skia/skia/src/core/SkScaleToSides.h b/gfx/skia/skia/src/core/SkScaleToSides.h new file mode 100644 index 0000000000..f9ba845990 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScaleToSides.h @@ -0,0 +1,64 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkScaleToSides_DEFINED +#define SkScaleToSides_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +#include +#include + +class SkScaleToSides { +public: + // This code assumes that a and b fit in a float, and therefore the resulting smaller value + // of a and b will fit in a float. The side of the rectangle may be larger than a float. + // Scale must be less than or equal to the ratio limit / (*a + *b). + // This code assumes that NaN and Inf are never passed in. + static void AdjustRadii(double limit, double scale, SkScalar* a, SkScalar* b) { + SkASSERTF(scale < 1.0 && scale > 0.0, "scale: %g", scale); + + *a = (float)((double)*a * scale); + *b = (float)((double)*b * scale); + + if (*a + *b > limit) { + float* minRadius = a; + float* maxRadius = b; + + // Force minRadius to be the smaller of the two. + if (*minRadius > *maxRadius) { + using std::swap; + swap(minRadius, maxRadius); + } + + // newMinRadius must be float in order to give the actual value of the radius. + // The newMinRadius will always be smaller than limit. The largest that minRadius can be + // is 1/2 the ratio of minRadius : (minRadius + maxRadius), therefore in the resulting + // division, minRadius can be no larger than 1/2 limit + ULP. + float newMinRadius = *minRadius; + + float newMaxRadius = (float)(limit - newMinRadius); + + // Reduce newMaxRadius an ulp at a time until it fits. This usually never happens, + // but if it does it could be 1 or 2 times. In certain pathological cases it could be + // more. Max iterations seen so far is 17. + while (newMaxRadius + newMinRadius > limit) { + newMaxRadius = nextafterf(newMaxRadius, 0.0f); + } + *maxRadius = newMaxRadius; + } + + SkASSERTF(*a >= 0.0f && *b >= 0.0f, "a: %g, b: %g, limit: %g, scale: %g", *a, *b, limit, + scale); + + SkASSERTF(*a + *b <= limit, + "\nlimit: %.17f, sum: %.17f, a: %.10f, b: %.10f, scale: %.20f", + limit, *a + *b, *a, *b, scale); + } +}; +#endif // ScaleToSides_DEFINED diff --git a/gfx/skia/skia/src/core/SkScalerContext.cpp b/gfx/skia/skia/src/core/SkScalerContext.cpp new file mode 100644 index 0000000000..8c8ec0509c --- /dev/null +++ b/gfx/skia/skia/src/core/SkScalerContext.cpp @@ -0,0 +1,1284 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPaint.h" +#include "src/core/SkScalerContext.h" + +#include "include/core/SkDrawable.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkStrokeRec.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkAutoMalloc.h" +#include "src/core/SkAutoPixmapStorage.h" +#include "src/core/SkBlitter_A8.h" +#include "src/core/SkDescriptor.h" +#include "src/core/SkDrawBase.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkMaskGamma.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRectPriv.h" +#include "src/core/SkStroke.h" +#include "src/core/SkSurfacePriv.h" +#include "src/core/SkTextFormatParams.h" +#include "src/core/SkWriteBuffer.h" +#include "src/utils/SkMatrix22.h" +#include + +/////////////////////////////////////////////////////////////////////////////// + +namespace { +static inline const constexpr bool kSkShowTextBlitCoverage = false; +static inline const constexpr bool kSkScalerContextDumpRec = false; +} + +SkScalerContextRec SkScalerContext::PreprocessRec(const SkTypeface& typeface, + const SkScalerContextEffects& effects, + const SkDescriptor& desc) { + SkScalerContextRec rec = + *static_cast(desc.findEntry(kRec_SkDescriptorTag, nullptr)); + + // Allow the typeface to adjust the rec. + typeface.onFilterRec(&rec); + + if (effects.fMaskFilter) { + // Pre-blend is not currently applied to filtered text. + // The primary filter is blur, for which contrast makes no sense, + // and for which the destination guess error is more visible. + // Also, all existing users of blur have calibrated for linear. + rec.ignorePreBlend(); + } + + SkColor lumColor = rec.getLuminanceColor(); + + if (rec.fMaskFormat == SkMask::kA8_Format) { + U8CPU lum = SkComputeLuminance(SkColorGetR(lumColor), + SkColorGetG(lumColor), + SkColorGetB(lumColor)); + lumColor = SkColorSetRGB(lum, lum, lum); + } + + // TODO: remove CanonicalColor when we to fix up Chrome layout tests. + rec.setLuminanceColor(lumColor); + + return rec; +} + +SkScalerContext::SkScalerContext(sk_sp typeface, const SkScalerContextEffects& effects, + const SkDescriptor* desc) + : fRec(PreprocessRec(*typeface, effects, *desc)) + , fTypeface(std::move(typeface)) + , fPathEffect(sk_ref_sp(effects.fPathEffect)) + , fMaskFilter(sk_ref_sp(effects.fMaskFilter)) + // Initialize based on our settings. Subclasses can also force this. + , fGenerateImageFromPath(fRec.fFrameWidth >= 0 || fPathEffect != nullptr) + + , fPreBlend(fMaskFilter ? SkMaskGamma::PreBlend() : SkScalerContext::GetMaskPreBlend(fRec)) +{ + if constexpr (kSkScalerContextDumpRec) { + SkDebugf("SkScalerContext checksum %x count %d length %d\n", + desc->getChecksum(), desc->getCount(), desc->getLength()); + SkDebugf("%s", fRec.dump().c_str()); + SkDebugf(" effects %p\n", desc->findEntry(kEffects_SkDescriptorTag, nullptr)); + } +} + +SkScalerContext::~SkScalerContext() {} + +/** + * In order to call cachedDeviceLuminance, cachedPaintLuminance, or + * cachedMaskGamma the caller must hold the mask_gamma_cache_mutex and continue + * to hold it until the returned pointer is refed or forgotten. + */ +static SkMutex& mask_gamma_cache_mutex() { + static SkMutex& mutex = *(new SkMutex); + return mutex; +} + +static SkMaskGamma* gLinearMaskGamma = nullptr; +static SkMaskGamma* gMaskGamma = nullptr; +static SkScalar gContrast = SK_ScalarMin; +static SkScalar gPaintGamma = SK_ScalarMin; +static SkScalar gDeviceGamma = SK_ScalarMin; + +/** + * The caller must hold the mask_gamma_cache_mutex() and continue to hold it until + * the returned SkMaskGamma pointer is refed or forgotten. + */ +static const SkMaskGamma& cached_mask_gamma(SkScalar contrast, SkScalar paintGamma, + SkScalar deviceGamma) { + mask_gamma_cache_mutex().assertHeld(); + if (0 == contrast && SK_Scalar1 == paintGamma && SK_Scalar1 == deviceGamma) { + if (nullptr == gLinearMaskGamma) { + gLinearMaskGamma = new SkMaskGamma; + } + return *gLinearMaskGamma; + } + if (gContrast != contrast || gPaintGamma != paintGamma || gDeviceGamma != deviceGamma) { + SkSafeUnref(gMaskGamma); + gMaskGamma = new SkMaskGamma(contrast, paintGamma, deviceGamma); + gContrast = contrast; + gPaintGamma = paintGamma; + gDeviceGamma = deviceGamma; + } + return *gMaskGamma; +} + +/** + * Expands fDeviceGamma, fPaintGamma, fContrast, and fLumBits into a mask pre-blend. + */ +SkMaskGamma::PreBlend SkScalerContext::GetMaskPreBlend(const SkScalerContextRec& rec) { + SkAutoMutexExclusive ama(mask_gamma_cache_mutex()); + + const SkMaskGamma& maskGamma = cached_mask_gamma(rec.getContrast(), + rec.getPaintGamma(), + rec.getDeviceGamma()); + + // TODO: remove CanonicalColor when we to fix up Chrome layout tests. + return maskGamma.preBlend(rec.getLuminanceColor()); +} + +size_t SkScalerContext::GetGammaLUTSize(SkScalar contrast, SkScalar paintGamma, + SkScalar deviceGamma, int* width, int* height) { + SkAutoMutexExclusive ama(mask_gamma_cache_mutex()); + const SkMaskGamma& maskGamma = cached_mask_gamma(contrast, + paintGamma, + deviceGamma); + + maskGamma.getGammaTableDimensions(width, height); + size_t size = (*width)*(*height)*sizeof(uint8_t); + + return size; +} + +bool SkScalerContext::GetGammaLUTData(SkScalar contrast, SkScalar paintGamma, SkScalar deviceGamma, + uint8_t* data) { + SkAutoMutexExclusive ama(mask_gamma_cache_mutex()); + const SkMaskGamma& maskGamma = cached_mask_gamma(contrast, + paintGamma, + deviceGamma); + const uint8_t* gammaTables = maskGamma.getGammaTables(); + if (!gammaTables) { + return false; + } + + int width, height; + maskGamma.getGammaTableDimensions(&width, &height); + size_t size = width*height * sizeof(uint8_t); + memcpy(data, gammaTables, size); + return true; +} + +SkGlyph SkScalerContext::makeGlyph(SkPackedGlyphID packedID, SkArenaAlloc* alloc) { + return internalMakeGlyph(packedID, fRec.fMaskFormat, alloc); +} + +bool SkScalerContext::GenerateMetricsFromPath( + SkGlyph* glyph, const SkPath& devPath, SkMask::Format format, + const bool verticalLCD, const bool a8FromLCD, const bool hairline) +{ + // Only BW, A8, and LCD16 can be produced from paths. + if (glyph->fMaskFormat != SkMask::kBW_Format && + glyph->fMaskFormat != SkMask::kA8_Format && + glyph->fMaskFormat != SkMask::kLCD16_Format) + { + glyph->fMaskFormat = SkMask::kA8_Format; + } + + const SkRect bounds = devPath.getBounds(); + const SkIRect ir = bounds.roundOut(); + if (!SkRectPriv::Is16Bit(ir)) { + return false; + } + glyph->fLeft = ir.fLeft; + glyph->fTop = ir.fTop; + glyph->fWidth = SkToU16(ir.width()); + glyph->fHeight = SkToU16(ir.height()); + + if (!ir.isEmpty()) { + const bool fromLCD = (glyph->fMaskFormat == SkMask::kLCD16_Format) || + (glyph->fMaskFormat == SkMask::kA8_Format && a8FromLCD); + const bool notEmptyAndFromLCD = 0 < glyph->fWidth && fromLCD; + + const bool needExtraWidth = (notEmptyAndFromLCD && !verticalLCD) || hairline; + const bool needExtraHeight = (notEmptyAndFromLCD && verticalLCD) || hairline; + if (needExtraWidth) { + glyph->fWidth += 2; + glyph->fLeft -= 1; + } + if (needExtraHeight) { + glyph->fHeight += 2; + glyph->fTop -= 1; + } + } + return true; +} + +SkGlyph SkScalerContext::internalMakeGlyph(SkPackedGlyphID packedID, SkMask::Format format, SkArenaAlloc* alloc) { + auto zeroBounds = [](SkGlyph& glyph) { + glyph.fLeft = 0; + glyph.fTop = 0; + glyph.fWidth = 0; + glyph.fHeight = 0; + }; + SkGlyph glyph{packedID}; + glyph.fMaskFormat = format; + // Must call to allow the subclass to determine the glyph representation to use. + this->generateMetrics(&glyph, alloc); + SkDEBUGCODE(glyph.fAdvancesBoundsFormatAndInitialPathDone = true;) + if (fGenerateImageFromPath) { + this->internalGetPath(glyph, alloc); + const SkPath* devPath = glyph.path(); + if (devPath) { + // generateMetrics may have modified the glyph fMaskFormat. + glyph.fMaskFormat = format; + const bool doVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); + const bool a8LCD = SkToBool(fRec.fFlags & SkScalerContext::kGenA8FromLCD_Flag); + const bool hairline = glyph.pathIsHairline(); + if (!GenerateMetricsFromPath(&glyph, *devPath, format, doVert, a8LCD, hairline)) { + zeroBounds(glyph); + return glyph; + } + } + } + + // if either dimension is empty, zap the image bounds of the glyph + if (0 == glyph.fWidth || 0 == glyph.fHeight) { + zeroBounds(glyph); + return glyph; + } + + if (fMaskFilter) { + SkMask src = glyph.mask(), + dst; + SkMatrix matrix; + + fRec.getMatrixFrom2x2(&matrix); + + src.fImage = nullptr; // only want the bounds from the filter + if (as_MFB(fMaskFilter)->filterMask(&dst, src, matrix, nullptr)) { + if (dst.fBounds.isEmpty() || !SkRectPriv::Is16Bit(dst.fBounds)) { + zeroBounds(glyph); + return glyph; + } + SkASSERT(dst.fImage == nullptr); + glyph.fLeft = dst.fBounds.fLeft; + glyph.fTop = dst.fBounds.fTop; + glyph.fWidth = SkToU16(dst.fBounds.width()); + glyph.fHeight = SkToU16(dst.fBounds.height()); + glyph.fMaskFormat = dst.fFormat; + } + } + return glyph; +} + +static void applyLUTToA8Mask(const SkMask& mask, const uint8_t* lut) { + uint8_t* SK_RESTRICT dst = (uint8_t*)mask.fImage; + unsigned rowBytes = mask.fRowBytes; + + for (int y = mask.fBounds.height() - 1; y >= 0; --y) { + for (int x = mask.fBounds.width() - 1; x >= 0; --x) { + dst[x] = lut[dst[x]]; + } + dst += rowBytes; + } +} + +static void pack4xHToMask(const SkPixmap& src, const SkMask& dst, + const SkMaskGamma::PreBlend& maskPreBlend, + const bool doBGR, const bool doVert) { +#define SAMPLES_PER_PIXEL 4 +#define LCD_PER_PIXEL 3 + SkASSERT(kAlpha_8_SkColorType == src.colorType()); + + const bool toA8 = SkMask::kA8_Format == dst.fFormat; + SkASSERT(SkMask::kLCD16_Format == dst.fFormat || toA8); + + // doVert in this function means swap x and y when writing to dst. + if (doVert) { + SkASSERT(src.width() == (dst.fBounds.height() - 2) * 4); + SkASSERT(src.height() == dst.fBounds.width()); + } else { + SkASSERT(src.width() == (dst.fBounds.width() - 2) * 4); + SkASSERT(src.height() == dst.fBounds.height()); + } + + const int sample_width = src.width(); + const int height = src.height(); + + uint8_t* dstImage = dst.fImage; + size_t dstRB = dst.fRowBytes; + // An N tap FIR is defined by + // out[n] = coeff[0]*x[n] + coeff[1]*x[n-1] + ... + coeff[N]*x[n-N] + // or + // out[n] = sum(i, 0, N, coeff[i]*x[n-i]) + + // The strategy is to use one FIR (different coefficients) for each of r, g, and b. + // This means using every 4th FIR output value of each FIR and discarding the rest. + // The FIRs are aligned, and the coefficients reach 5 samples to each side of their 'center'. + // (For r and b this is technically incorrect, but the coeffs outside round to zero anyway.) + + // These are in some fixed point repesentation. + // Adding up to more than one simulates ink spread. + // For implementation reasons, these should never add up to more than two. + + // Coefficients determined by a gausian where 5 samples = 3 std deviations (0x110 'contrast'). + // Calculated using tools/generate_fir_coeff.py + // With this one almost no fringing is ever seen, but it is imperceptibly blurry. + // The lcd smoothed text is almost imperceptibly different from gray, + // but is still sharper on small stems and small rounded corners than gray. + // This also seems to be about as wide as one can get and only have a three pixel kernel. + // TODO: calculate these at runtime so parameters can be adjusted (esp contrast). + static const unsigned int coefficients[LCD_PER_PIXEL][SAMPLES_PER_PIXEL*3] = { + //The red subpixel is centered inside the first sample (at 1/6 pixel), and is shifted. + { 0x03, 0x0b, 0x1c, 0x33, 0x40, 0x39, 0x24, 0x10, 0x05, 0x01, 0x00, 0x00, }, + //The green subpixel is centered between two samples (at 1/2 pixel), so is symetric + { 0x00, 0x02, 0x08, 0x16, 0x2b, 0x3d, 0x3d, 0x2b, 0x16, 0x08, 0x02, 0x00, }, + //The blue subpixel is centered inside the last sample (at 5/6 pixel), and is shifted. + { 0x00, 0x00, 0x01, 0x05, 0x10, 0x24, 0x39, 0x40, 0x33, 0x1c, 0x0b, 0x03, }, + }; + + size_t dstPB = toA8 ? sizeof(uint8_t) : sizeof(uint16_t); + for (int y = 0; y < height; ++y) { + uint8_t* dstP; + size_t dstPDelta; + if (doVert) { + dstP = SkTAddOffset(dstImage, y * dstPB); + dstPDelta = dstRB; + } else { + dstP = SkTAddOffset(dstImage, y * dstRB); + dstPDelta = dstPB; + } + + const uint8_t* srcP = src.addr8(0, y); + + // TODO: this fir filter implementation is straight forward, but slow. + // It should be possible to make it much faster. + for (int sample_x = -4; sample_x < sample_width + 4; sample_x += 4) { + int fir[LCD_PER_PIXEL] = { 0 }; + for (int sample_index = std::max(0, sample_x - 4), coeff_index = sample_index - (sample_x - 4) + ; sample_index < std::min(sample_x + 8, sample_width) + ; ++sample_index, ++coeff_index) + { + int sample_value = srcP[sample_index]; + for (int subpxl_index = 0; subpxl_index < LCD_PER_PIXEL; ++subpxl_index) { + fir[subpxl_index] += coefficients[subpxl_index][coeff_index] * sample_value; + } + } + for (int subpxl_index = 0; subpxl_index < LCD_PER_PIXEL; ++subpxl_index) { + fir[subpxl_index] /= 0x100; + fir[subpxl_index] = std::min(fir[subpxl_index], 255); + } + + U8CPU r, g, b; + if (doBGR) { + r = fir[2]; + g = fir[1]; + b = fir[0]; + } else { + r = fir[0]; + g = fir[1]; + b = fir[2]; + } + if constexpr (kSkShowTextBlitCoverage) { + r = std::max(r, 10u); + g = std::max(g, 10u); + b = std::max(b, 10u); + } + if (toA8) { + U8CPU a = (r + g + b) / 3; + if (maskPreBlend.isApplicable()) { + a = maskPreBlend.fG[a]; + } + *dstP = a; + } else { + if (maskPreBlend.isApplicable()) { + r = maskPreBlend.fR[r]; + g = maskPreBlend.fG[g]; + b = maskPreBlend.fB[b]; + } + *(uint16_t*)dstP = SkPack888ToRGB16(r, g, b); + } + dstP = SkTAddOffset(dstP, dstPDelta); + } + } +} + +static inline int convert_8_to_1(unsigned byte) { + SkASSERT(byte <= 0xFF); + return byte >> 7; +} + +static uint8_t pack_8_to_1(const uint8_t alpha[8]) { + unsigned bits = 0; + for (int i = 0; i < 8; ++i) { + bits <<= 1; + bits |= convert_8_to_1(alpha[i]); + } + return SkToU8(bits); +} + +static void packA8ToA1(const SkMask& mask, const uint8_t* src, size_t srcRB) { + const int height = mask.fBounds.height(); + const int width = mask.fBounds.width(); + const int octs = width >> 3; + const int leftOverBits = width & 7; + + uint8_t* dst = mask.fImage; + const int dstPad = mask.fRowBytes - SkAlign8(width)/8; + SkASSERT(dstPad >= 0); + + SkASSERT(width >= 0); + SkASSERT(srcRB >= (size_t)width); + const size_t srcPad = srcRB - width; + + for (int y = 0; y < height; ++y) { + for (int i = 0; i < octs; ++i) { + *dst++ = pack_8_to_1(src); + src += 8; + } + if (leftOverBits > 0) { + unsigned bits = 0; + int shift = 7; + for (int i = 0; i < leftOverBits; ++i, --shift) { + bits |= convert_8_to_1(*src++) << shift; + } + *dst++ = bits; + } + src += srcPad; + dst += dstPad; + } +} + +void SkScalerContext::GenerateImageFromPath( + const SkMask& mask, const SkPath& path, const SkMaskGamma::PreBlend& maskPreBlend, + const bool doBGR, const bool verticalLCD, const bool a8FromLCD, const bool hairline) +{ + SkASSERT(mask.fFormat == SkMask::kBW_Format || + mask.fFormat == SkMask::kA8_Format || + mask.fFormat == SkMask::kLCD16_Format); + + SkPaint paint; + SkPath strokePath; + const SkPath* pathToUse = &path; + + int srcW = mask.fBounds.width(); + int srcH = mask.fBounds.height(); + int dstW = srcW; + int dstH = srcH; + + SkMatrix matrix; + matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft), + -SkIntToScalar(mask.fBounds.fTop)); + + paint.setStroke(hairline); + paint.setAntiAlias(SkMask::kBW_Format != mask.fFormat); + + const bool fromLCD = (mask.fFormat == SkMask::kLCD16_Format) || + (mask.fFormat == SkMask::kA8_Format && a8FromLCD); + const bool intermediateDst = fromLCD || mask.fFormat == SkMask::kBW_Format; + if (fromLCD) { + if (verticalLCD) { + dstW = 4*dstH - 8; + dstH = srcW; + matrix.setAll(0, 4, -SkIntToScalar(mask.fBounds.fTop + 1) * 4, + 1, 0, -SkIntToScalar(mask.fBounds.fLeft), + 0, 0, 1); + } else { + dstW = 4*dstW - 8; + matrix.setAll(4, 0, -SkIntToScalar(mask.fBounds.fLeft + 1) * 4, + 0, 1, -SkIntToScalar(mask.fBounds.fTop), + 0, 0, 1); + } + + // LCD hairline doesn't line up with the pixels, so do it the expensive way. + SkStrokeRec rec(SkStrokeRec::kFill_InitStyle); + if (hairline) { + rec.setStrokeStyle(1.0f, false); + rec.setStrokeParams(SkPaint::kButt_Cap, SkPaint::kRound_Join, 0.0f); + } + if (rec.needToApply() && rec.applyToPath(&strokePath, path)) { + pathToUse = &strokePath; + paint.setStyle(SkPaint::kFill_Style); + } + } + + SkRasterClip clip; + clip.setRect(SkIRect::MakeWH(dstW, dstH)); + + const SkImageInfo info = SkImageInfo::MakeA8(dstW, dstH); + SkAutoPixmapStorage dst; + + if (intermediateDst) { + if (!dst.tryAlloc(info)) { + // can't allocate offscreen, so empty the mask and return + sk_bzero(mask.fImage, mask.computeImageSize()); + return; + } + } else { + dst.reset(info, mask.fImage, mask.fRowBytes); + } + sk_bzero(dst.writable_addr(), dst.computeByteSize()); + + SkDrawBase draw; + SkMatrixProvider matrixProvider(matrix); + draw.fBlitterChooser = SkA8Blitter_Choose; + draw.fDst = dst; + draw.fRC = &clip; + draw.fMatrixProvider = &matrixProvider; + draw.drawPath(*pathToUse, paint); + + switch (mask.fFormat) { + case SkMask::kBW_Format: + packA8ToA1(mask, dst.addr8(0, 0), dst.rowBytes()); + break; + case SkMask::kA8_Format: + if (fromLCD) { + pack4xHToMask(dst, mask, maskPreBlend, doBGR, verticalLCD); + } else if (maskPreBlend.isApplicable()) { + applyLUTToA8Mask(mask, maskPreBlend.fG); + } + break; + case SkMask::kLCD16_Format: + pack4xHToMask(dst, mask, maskPreBlend, doBGR, verticalLCD); + break; + default: + break; + } +} + +void SkScalerContext::getImage(const SkGlyph& origGlyph) { + SkASSERT(origGlyph.fAdvancesBoundsFormatAndInitialPathDone); + + const SkGlyph* unfilteredGlyph = &origGlyph; + // in case we need to call generateImage on a mask-format that is different + // (i.e. larger) than what our caller allocated by looking at origGlyph. + SkAutoMalloc tmpGlyphImageStorage; + SkGlyph tmpGlyph; + SkSTArenaAlloc tmpGlyphPathDataStorage; + if (fMaskFilter) { + // need the original bounds, sans our maskfilter + sk_sp mf = std::move(fMaskFilter); + tmpGlyph = this->makeGlyph(origGlyph.getPackedID(), &tmpGlyphPathDataStorage); + fMaskFilter = std::move(mf); + + // Use the origGlyph storage for the temporary unfiltered mask if it will fit. + if (tmpGlyph.fMaskFormat == origGlyph.fMaskFormat && + tmpGlyph.imageSize() <= origGlyph.imageSize()) + { + tmpGlyph.fImage = origGlyph.fImage; + } else { + tmpGlyphImageStorage.reset(tmpGlyph.imageSize()); + tmpGlyph.fImage = tmpGlyphImageStorage.get(); + } + unfilteredGlyph = &tmpGlyph; + } + + if (!fGenerateImageFromPath) { + generateImage(*unfilteredGlyph); + } else { + SkASSERT(origGlyph.setPathHasBeenCalled()); + const SkPath* devPath = origGlyph.path(); + + if (!devPath) { + generateImage(*unfilteredGlyph); + } else { + SkMask mask = unfilteredGlyph->mask(); + SkASSERT(SkMask::kARGB32_Format != origGlyph.fMaskFormat); + SkASSERT(SkMask::kARGB32_Format != mask.fFormat); + const bool doBGR = SkToBool(fRec.fFlags & SkScalerContext::kLCD_BGROrder_Flag); + const bool doVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); + const bool a8LCD = SkToBool(fRec.fFlags & SkScalerContext::kGenA8FromLCD_Flag); + const bool hairline = origGlyph.pathIsHairline(); + GenerateImageFromPath(mask, *devPath, fPreBlend, doBGR, doVert, a8LCD, hairline); + } + } + + if (fMaskFilter) { + // k3D_Format should not be mask filtered. + SkASSERT(SkMask::k3D_Format != unfilteredGlyph->fMaskFormat); + + SkMask filteredMask; + SkMask srcMask; + SkMatrix m; + fRec.getMatrixFrom2x2(&m); + + if (as_MFB(fMaskFilter)->filterMask(&filteredMask, unfilteredGlyph->mask(), m, nullptr)) { + // Filter succeeded; filteredMask.fImage was allocated. + srcMask = filteredMask; + } else if (unfilteredGlyph->fImage == tmpGlyphImageStorage.get()) { + // Filter did nothing; unfiltered mask is independent of origGlyph.fImage. + srcMask = unfilteredGlyph->mask(); + } else if (origGlyph.iRect() == unfilteredGlyph->iRect()) { + // Filter did nothing; the unfiltered mask is in origGlyph.fImage and matches. + return; + } else { + // Filter did nothing; the unfiltered mask is in origGlyph.fImage and conflicts. + srcMask = unfilteredGlyph->mask(); + size_t imageSize = unfilteredGlyph->imageSize(); + tmpGlyphImageStorage.reset(imageSize); + srcMask.fImage = static_cast(tmpGlyphImageStorage.get()); + memcpy(srcMask.fImage, unfilteredGlyph->fImage, imageSize); + } + + SkASSERT_RELEASE(srcMask.fFormat == origGlyph.fMaskFormat); + SkMask dstMask = origGlyph.mask(); + SkIRect origBounds = dstMask.fBounds; + + // Find the intersection of src and dst while updating the fImages. + if (srcMask.fBounds.fTop < dstMask.fBounds.fTop) { + int32_t topDiff = dstMask.fBounds.fTop - srcMask.fBounds.fTop; + srcMask.fImage += srcMask.fRowBytes * topDiff; + srcMask.fBounds.fTop = dstMask.fBounds.fTop; + } + if (dstMask.fBounds.fTop < srcMask.fBounds.fTop) { + int32_t topDiff = srcMask.fBounds.fTop - dstMask.fBounds.fTop; + dstMask.fImage += dstMask.fRowBytes * topDiff; + dstMask.fBounds.fTop = srcMask.fBounds.fTop; + } + + if (srcMask.fBounds.fLeft < dstMask.fBounds.fLeft) { + int32_t leftDiff = dstMask.fBounds.fLeft - srcMask.fBounds.fLeft; + srcMask.fImage += leftDiff; + srcMask.fBounds.fLeft = dstMask.fBounds.fLeft; + } + if (dstMask.fBounds.fLeft < srcMask.fBounds.fLeft) { + int32_t leftDiff = srcMask.fBounds.fLeft - dstMask.fBounds.fLeft; + dstMask.fImage += leftDiff; + dstMask.fBounds.fLeft = srcMask.fBounds.fLeft; + } + + if (srcMask.fBounds.fBottom < dstMask.fBounds.fBottom) { + dstMask.fBounds.fBottom = srcMask.fBounds.fBottom; + } + if (dstMask.fBounds.fBottom < srcMask.fBounds.fBottom) { + srcMask.fBounds.fBottom = dstMask.fBounds.fBottom; + } + + if (srcMask.fBounds.fRight < dstMask.fBounds.fRight) { + dstMask.fBounds.fRight = srcMask.fBounds.fRight; + } + if (dstMask.fBounds.fRight < srcMask.fBounds.fRight) { + srcMask.fBounds.fRight = dstMask.fBounds.fRight; + } + + SkASSERT(srcMask.fBounds == dstMask.fBounds); + int width = srcMask.fBounds.width(); + int height = srcMask.fBounds.height(); + int dstRB = dstMask.fRowBytes; + int srcRB = srcMask.fRowBytes; + + const uint8_t* src = srcMask.fImage; + uint8_t* dst = dstMask.fImage; + + if (SkMask::k3D_Format == filteredMask.fFormat) { + // we have to copy 3 times as much + height *= 3; + } + + // If not filling the full original glyph, clear it out first. + if (dstMask.fBounds != origBounds) { + sk_bzero(origGlyph.fImage, origGlyph.fHeight * origGlyph.rowBytes()); + } + + while (--height >= 0) { + memcpy(dst, src, width); + src += srcRB; + dst += dstRB; + } + SkMask::FreeImage(filteredMask.fImage); + } +} + +void SkScalerContext::getPath(SkGlyph& glyph, SkArenaAlloc* alloc) { + this->internalGetPath(glyph, alloc); +} + +sk_sp SkScalerContext::getDrawable(SkGlyph& glyph) { + return this->generateDrawable(glyph); +} +//TODO: make pure virtual +sk_sp SkScalerContext::generateDrawable(const SkGlyph&) { + return nullptr; +} + +void SkScalerContext::getFontMetrics(SkFontMetrics* fm) { + SkASSERT(fm); + this->generateFontMetrics(fm); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkScalerContext::internalGetPath(SkGlyph& glyph, SkArenaAlloc* alloc) { + SkASSERT(glyph.fAdvancesBoundsFormatAndInitialPathDone); + + if (glyph.setPathHasBeenCalled()) { + return; + } + + SkPath path; + SkPath devPath; + bool hairline = false; + + SkPackedGlyphID glyphID = glyph.getPackedID(); + if (!generatePath(glyph, &path)) { + glyph.setPath(alloc, (SkPath*)nullptr, hairline); + return; + } + + if (fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag) { + SkFixed dx = glyphID.getSubXFixed(); + SkFixed dy = glyphID.getSubYFixed(); + if (dx | dy) { + path.offset(SkFixedToScalar(dx), SkFixedToScalar(dy)); + } + } + + if (fRec.fFrameWidth < 0 && fPathEffect == nullptr) { + devPath.swap(path); + } else { + // need the path in user-space, with only the point-size applied + // so that our stroking and effects will operate the same way they + // would if the user had extracted the path themself, and then + // called drawPath + SkPath localPath; + SkMatrix matrix; + SkMatrix inverse; + + fRec.getMatrixFrom2x2(&matrix); + if (!matrix.invert(&inverse)) { + glyph.setPath(alloc, &devPath, hairline); + } + path.transform(inverse, &localPath); + // now localPath is only affected by the paint settings, and not the canvas matrix + + SkStrokeRec rec(SkStrokeRec::kFill_InitStyle); + + if (fRec.fFrameWidth >= 0) { + rec.setStrokeStyle(fRec.fFrameWidth, + SkToBool(fRec.fFlags & kFrameAndFill_Flag)); + // glyphs are always closed contours, so cap type is ignored, + // so we just pass something. + rec.setStrokeParams((SkPaint::Cap)fRec.fStrokeCap, + (SkPaint::Join)fRec.fStrokeJoin, + fRec.fMiterLimit); + } + + if (fPathEffect) { + SkPath effectPath; + if (fPathEffect->filterPath(&effectPath, localPath, &rec, nullptr, matrix)) { + localPath.swap(effectPath); + } + } + + if (rec.needToApply()) { + SkPath strokePath; + if (rec.applyToPath(&strokePath, localPath)) { + localPath.swap(strokePath); + } + } + + // The path effect may have modified 'rec', so wait to here to check hairline status. + if (rec.isHairlineStyle()) { + hairline = true; + } + + localPath.transform(matrix, &devPath); + } + glyph.setPath(alloc, &devPath, hairline); +} + + +void SkScalerContextRec::getMatrixFrom2x2(SkMatrix* dst) const { + dst->setAll(fPost2x2[0][0], fPost2x2[0][1], 0, + fPost2x2[1][0], fPost2x2[1][1], 0, + 0, 0, 1); +} + +void SkScalerContextRec::getLocalMatrix(SkMatrix* m) const { + *m = SkFontPriv::MakeTextMatrix(fTextSize, fPreScaleX, fPreSkewX); +} + +void SkScalerContextRec::getSingleMatrix(SkMatrix* m) const { + this->getLocalMatrix(m); + + // now concat the device matrix + SkMatrix deviceMatrix; + this->getMatrixFrom2x2(&deviceMatrix); + m->postConcat(deviceMatrix); +} + +bool SkScalerContextRec::computeMatrices(PreMatrixScale preMatrixScale, SkVector* s, SkMatrix* sA, + SkMatrix* GsA, SkMatrix* G_inv, SkMatrix* A_out) +{ + // A is the 'total' matrix. + SkMatrix A; + this->getSingleMatrix(&A); + + // The caller may find the 'total' matrix useful when dealing directly with EM sizes. + if (A_out) { + *A_out = A; + } + + // GA is the matrix A with rotation removed. + SkMatrix GA; + bool skewedOrFlipped = A.getSkewX() || A.getSkewY() || A.getScaleX() < 0 || A.getScaleY() < 0; + if (skewedOrFlipped) { + // QR by Givens rotations. G is Q^T and GA is R. G is rotational (no reflections). + // h is where A maps the horizontal baseline. + SkPoint h = SkPoint::Make(SK_Scalar1, 0); + A.mapPoints(&h, 1); + + // G is the Givens Matrix for A (rotational matrix where GA[0][1] == 0). + SkMatrix G; + SkComputeGivensRotation(h, &G); + + GA = G; + GA.preConcat(A); + + // The 'remainingRotation' is G inverse, which is fairly simple since G is 2x2 rotational. + if (G_inv) { + G_inv->setAll( + G.get(SkMatrix::kMScaleX), -G.get(SkMatrix::kMSkewX), G.get(SkMatrix::kMTransX), + -G.get(SkMatrix::kMSkewY), G.get(SkMatrix::kMScaleY), G.get(SkMatrix::kMTransY), + G.get(SkMatrix::kMPersp0), G.get(SkMatrix::kMPersp1), G.get(SkMatrix::kMPersp2)); + } + } else { + GA = A; + if (G_inv) { + G_inv->reset(); + } + } + + // If the 'total' matrix is singular, set the 'scale' to something finite and zero the matrices. + // All underlying ports have issues with zero text size, so use the matricies to zero. + // If one of the scale factors is less than 1/256 then an EM filling square will + // never affect any pixels. + // If there are any nonfinite numbers in the matrix, bail out and set the matrices to zero. + if (SkScalarAbs(GA.get(SkMatrix::kMScaleX)) <= SK_ScalarNearlyZero || + SkScalarAbs(GA.get(SkMatrix::kMScaleY)) <= SK_ScalarNearlyZero || + !GA.isFinite()) + { + s->fX = SK_Scalar1; + s->fY = SK_Scalar1; + sA->setScale(0, 0); + if (GsA) { + GsA->setScale(0, 0); + } + if (G_inv) { + G_inv->reset(); + } + return false; + } + + // At this point, given GA, create s. + switch (preMatrixScale) { + case PreMatrixScale::kFull: + s->fX = SkScalarAbs(GA.get(SkMatrix::kMScaleX)); + s->fY = SkScalarAbs(GA.get(SkMatrix::kMScaleY)); + break; + case PreMatrixScale::kVertical: { + SkScalar yScale = SkScalarAbs(GA.get(SkMatrix::kMScaleY)); + s->fX = yScale; + s->fY = yScale; + break; + } + case PreMatrixScale::kVerticalInteger: { + SkScalar realYScale = SkScalarAbs(GA.get(SkMatrix::kMScaleY)); + SkScalar intYScale = SkScalarRoundToScalar(realYScale); + if (intYScale == 0) { + intYScale = SK_Scalar1; + } + s->fX = intYScale; + s->fY = intYScale; + break; + } + } + + // The 'remaining' matrix sA is the total matrix A without the scale. + if (!skewedOrFlipped && ( + (PreMatrixScale::kFull == preMatrixScale) || + (PreMatrixScale::kVertical == preMatrixScale && A.getScaleX() == A.getScaleY()))) + { + // If GA == A and kFull, sA is identity. + // If GA == A and kVertical and A.scaleX == A.scaleY, sA is identity. + sA->reset(); + } else if (!skewedOrFlipped && PreMatrixScale::kVertical == preMatrixScale) { + // If GA == A and kVertical, sA.scaleY is SK_Scalar1. + sA->reset(); + sA->setScaleX(A.getScaleX() / s->fY); + } else { + // TODO: like kVertical, kVerticalInteger with int scales. + *sA = A; + sA->preScale(SkScalarInvert(s->fX), SkScalarInvert(s->fY)); + } + + // The 'remainingWithoutRotation' matrix GsA is the non-rotational part of A without the scale. + if (GsA) { + *GsA = GA; + // G is rotational so reorders with the scale. + GsA->preScale(SkScalarInvert(s->fX), SkScalarInvert(s->fY)); + } + + return true; +} + +SkAxisAlignment SkScalerContext::computeAxisAlignmentForHText() const { + return fRec.computeAxisAlignmentForHText(); +} + +SkAxisAlignment SkScalerContextRec::computeAxisAlignmentForHText() const { + // Why fPost2x2 can be used here. + // getSingleMatrix multiplies in getLocalMatrix, which consists of + // * fTextSize (a scale, which has no effect) + // * fPreScaleX (a scale in x, which has no effect) + // * fPreSkewX (has no effect, but would on vertical text alignment). + // In other words, making the text bigger, stretching it along the + // horizontal axis, or fake italicizing it does not move the baseline. + if (!SkToBool(fFlags & SkScalerContext::kBaselineSnap_Flag)) { + return SkAxisAlignment::kNone; + } + + if (0 == fPost2x2[1][0]) { + // The x axis is mapped onto the x axis. + return SkAxisAlignment::kX; + } + if (0 == fPost2x2[0][0]) { + // The x axis is mapped onto the y axis. + return SkAxisAlignment::kY; + } + return SkAxisAlignment::kNone; +} + +void SkScalerContextRec::setLuminanceColor(SkColor c) { + fLumBits = SkMaskGamma::CanonicalColor( + SkColorSetRGB(SkColorGetR(c), SkColorGetG(c), SkColorGetB(c))); +} + +/* + * Return the scalar with only limited fractional precision. Used to consolidate matrices + * that vary only slightly when we create our key into the font cache, since the font scaler + * typically returns the same looking resuts for tiny changes in the matrix. + */ +static SkScalar sk_relax(SkScalar x) { + SkScalar n = SkScalarRoundToScalar(x * 1024); + return n / 1024.0f; +} + +static SkMask::Format compute_mask_format(const SkFont& font) { + switch (font.getEdging()) { + case SkFont::Edging::kAlias: + return SkMask::kBW_Format; + case SkFont::Edging::kAntiAlias: + return SkMask::kA8_Format; + case SkFont::Edging::kSubpixelAntiAlias: + return SkMask::kLCD16_Format; + } + SkASSERT(false); + return SkMask::kA8_Format; +} + +// Beyond this size, LCD doesn't appreciably improve quality, but it always +// cost more RAM and draws slower, so we set a cap. +#ifndef SK_MAX_SIZE_FOR_LCDTEXT + #define SK_MAX_SIZE_FOR_LCDTEXT 48 +#endif + +const SkScalar gMaxSize2ForLCDText = SK_MAX_SIZE_FOR_LCDTEXT * SK_MAX_SIZE_FOR_LCDTEXT; + +static bool too_big_for_lcd(const SkScalerContextRec& rec, bool checkPost2x2) { + if (checkPost2x2) { + SkScalar area = rec.fPost2x2[0][0] * rec.fPost2x2[1][1] - + rec.fPost2x2[1][0] * rec.fPost2x2[0][1]; + area *= rec.fTextSize * rec.fTextSize; + return area > gMaxSize2ForLCDText; + } else { + return rec.fTextSize > SK_MAX_SIZE_FOR_LCDTEXT; + } +} + +// The only reason this is not file static is because it needs the context of SkScalerContext to +// access SkPaint::computeLuminanceColor. +void SkScalerContext::MakeRecAndEffects(const SkFont& font, const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix, + SkScalerContextRec* rec, + SkScalerContextEffects* effects) { + SkASSERT(!deviceMatrix.hasPerspective()); + + sk_bzero(rec, sizeof(SkScalerContextRec)); + + SkTypeface* typeface = font.getTypefaceOrDefault(); + + rec->fTypefaceID = typeface->uniqueID(); + rec->fTextSize = font.getSize(); + rec->fPreScaleX = font.getScaleX(); + rec->fPreSkewX = font.getSkewX(); + + bool checkPost2x2 = false; + + const SkMatrix::TypeMask mask = deviceMatrix.getType(); + if (mask & SkMatrix::kScale_Mask) { + rec->fPost2x2[0][0] = sk_relax(deviceMatrix.getScaleX()); + rec->fPost2x2[1][1] = sk_relax(deviceMatrix.getScaleY()); + checkPost2x2 = true; + } else { + rec->fPost2x2[0][0] = rec->fPost2x2[1][1] = SK_Scalar1; + } + if (mask & SkMatrix::kAffine_Mask) { + rec->fPost2x2[0][1] = sk_relax(deviceMatrix.getSkewX()); + rec->fPost2x2[1][0] = sk_relax(deviceMatrix.getSkewY()); + checkPost2x2 = true; + } else { + rec->fPost2x2[0][1] = rec->fPost2x2[1][0] = 0; + } + + SkPaint::Style style = paint.getStyle(); + SkScalar strokeWidth = paint.getStrokeWidth(); + + unsigned flags = 0; + + if (font.isEmbolden()) { +#ifdef SK_USE_FREETYPE_EMBOLDEN + flags |= SkScalerContext::kEmbolden_Flag; +#else + SkScalar fakeBoldScale = SkScalarInterpFunc(font.getSize(), + kStdFakeBoldInterpKeys, + kStdFakeBoldInterpValues, + kStdFakeBoldInterpLength); + SkScalar extra = font.getSize() * fakeBoldScale; + + if (style == SkPaint::kFill_Style) { + style = SkPaint::kStrokeAndFill_Style; + strokeWidth = extra; // ignore paint's strokeWidth if it was "fill" + } else { + strokeWidth += extra; + } +#endif + } + + if (style != SkPaint::kFill_Style && strokeWidth >= 0) { + rec->fFrameWidth = strokeWidth; + rec->fMiterLimit = paint.getStrokeMiter(); + rec->fStrokeJoin = SkToU8(paint.getStrokeJoin()); + rec->fStrokeCap = SkToU8(paint.getStrokeCap()); + + if (style == SkPaint::kStrokeAndFill_Style) { + flags |= SkScalerContext::kFrameAndFill_Flag; + } + } else { + rec->fFrameWidth = -1; + rec->fMiterLimit = 0; + rec->fStrokeJoin = 0; + rec->fStrokeCap = 0; + } + + rec->fMaskFormat = compute_mask_format(font); + + if (SkMask::kLCD16_Format == rec->fMaskFormat) { + if (too_big_for_lcd(*rec, checkPost2x2)) { + rec->fMaskFormat = SkMask::kA8_Format; + flags |= SkScalerContext::kGenA8FromLCD_Flag; + } else { + SkPixelGeometry geometry = surfaceProps.pixelGeometry(); + + switch (geometry) { + case kUnknown_SkPixelGeometry: + // eeek, can't support LCD + rec->fMaskFormat = SkMask::kA8_Format; + flags |= SkScalerContext::kGenA8FromLCD_Flag; + break; + case kRGB_H_SkPixelGeometry: + // our default, do nothing. + break; + case kBGR_H_SkPixelGeometry: + flags |= SkScalerContext::kLCD_BGROrder_Flag; + break; + case kRGB_V_SkPixelGeometry: + flags |= SkScalerContext::kLCD_Vertical_Flag; + break; + case kBGR_V_SkPixelGeometry: + flags |= SkScalerContext::kLCD_Vertical_Flag; + flags |= SkScalerContext::kLCD_BGROrder_Flag; + break; + } + } + } + + if (font.isEmbeddedBitmaps()) { + flags |= SkScalerContext::kEmbeddedBitmapText_Flag; + } + if (font.isSubpixel()) { + flags |= SkScalerContext::kSubpixelPositioning_Flag; + } + if (font.isForceAutoHinting()) { + flags |= SkScalerContext::kForceAutohinting_Flag; + } + if (font.isLinearMetrics()) { + flags |= SkScalerContext::kLinearMetrics_Flag; + } + if (font.isBaselineSnap()) { + flags |= SkScalerContext::kBaselineSnap_Flag; + } + if (typeface->glyphMaskNeedsCurrentColor()) { + flags |= SkScalerContext::kNeedsForegroundColor_Flag; + rec->fForegroundColor = paint.getColor(); + } + rec->fFlags = SkToU16(flags); + + // these modify fFlags, so do them after assigning fFlags + rec->setHinting(font.getHinting()); + rec->setLuminanceColor(SkPaintPriv::ComputeLuminanceColor(paint)); + + // For now always set the paint gamma equal to the device gamma. + // The math in SkMaskGamma can handle them being different, + // but it requires superluminous masks when + // Ex : deviceGamma(x) < paintGamma(x) and x is sufficiently large. + rec->setDeviceGamma(SK_GAMMA_EXPONENT); + rec->setPaintGamma(SK_GAMMA_EXPONENT); + +#ifdef SK_GAMMA_CONTRAST + rec->setContrast(SK_GAMMA_CONTRAST); +#else + // A value of 0.5 for SK_GAMMA_CONTRAST appears to be a good compromise. + // With lower values small text appears washed out (though correctly so). + // With higher values lcd fringing is worse and the smoothing effect of + // partial coverage is diminished. + rec->setContrast(0.5f); +#endif + + if (!SkToBool(scalerContextFlags & SkScalerContextFlags::kFakeGamma)) { + rec->ignoreGamma(); + } + if (!SkToBool(scalerContextFlags & SkScalerContextFlags::kBoostContrast)) { + rec->setContrast(0); + } + + new (effects) SkScalerContextEffects{paint}; +} + +SkDescriptor* SkScalerContext::CreateDescriptorAndEffectsUsingPaint( + const SkFont& font, const SkPaint& paint, const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, const SkMatrix& deviceMatrix, SkAutoDescriptor* ad, + SkScalerContextEffects* effects) +{ + SkScalerContextRec rec; + MakeRecAndEffects(font, paint, surfaceProps, scalerContextFlags, deviceMatrix, &rec, effects); + return AutoDescriptorGivenRecAndEffects(rec, *effects, ad); +} + +static size_t calculate_size_and_flatten(const SkScalerContextRec& rec, + const SkScalerContextEffects& effects, + SkBinaryWriteBuffer* effectBuffer) { + size_t descSize = sizeof(rec); + int entryCount = 1; + + if (effects.fPathEffect || effects.fMaskFilter) { + if (effects.fPathEffect) { effectBuffer->writeFlattenable(effects.fPathEffect); } + if (effects.fMaskFilter) { effectBuffer->writeFlattenable(effects.fMaskFilter); } + entryCount += 1; + descSize += effectBuffer->bytesWritten(); + } + + descSize += SkDescriptor::ComputeOverhead(entryCount); + return descSize; +} + +static void generate_descriptor(const SkScalerContextRec& rec, + const SkBinaryWriteBuffer& effectBuffer, + SkDescriptor* desc) { + desc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec); + + if (effectBuffer.bytesWritten() > 0) { + effectBuffer.writeToMemory(desc->addEntry(kEffects_SkDescriptorTag, + effectBuffer.bytesWritten(), + nullptr)); + } + + desc->computeChecksum(); +} + +SkDescriptor* SkScalerContext::AutoDescriptorGivenRecAndEffects( + const SkScalerContextRec& rec, + const SkScalerContextEffects& effects, + SkAutoDescriptor* ad) +{ + SkBinaryWriteBuffer buf; + + ad->reset(calculate_size_and_flatten(rec, effects, &buf)); + generate_descriptor(rec, buf, ad->getDesc()); + + return ad->getDesc(); +} + +std::unique_ptr SkScalerContext::DescriptorGivenRecAndEffects( + const SkScalerContextRec& rec, + const SkScalerContextEffects& effects) +{ + SkBinaryWriteBuffer buf; + + auto desc = SkDescriptor::Alloc(calculate_size_and_flatten(rec, effects, &buf)); + generate_descriptor(rec, buf, desc.get()); + + return desc; +} + +void SkScalerContext::DescriptorBufferGiveRec(const SkScalerContextRec& rec, void* buffer) { + generate_descriptor(rec, SkBinaryWriteBuffer{}, (SkDescriptor*)buffer); +} + +bool SkScalerContext::CheckBufferSizeForRec(const SkScalerContextRec& rec, + const SkScalerContextEffects& effects, + size_t size) { + SkBinaryWriteBuffer buf; + return size >= calculate_size_and_flatten(rec, effects, &buf); +} + +std::unique_ptr SkScalerContext::MakeEmpty( + sk_sp typeface, const SkScalerContextEffects& effects, + const SkDescriptor* desc) { + class SkScalerContext_Empty : public SkScalerContext { + public: + SkScalerContext_Empty(sk_sp typeface, const SkScalerContextEffects& effects, + const SkDescriptor* desc) + : SkScalerContext(std::move(typeface), effects, desc) {} + + protected: + bool generateAdvance(SkGlyph* glyph) override { + glyph->zeroMetrics(); + return true; + } + void generateMetrics(SkGlyph* glyph, SkArenaAlloc*) override { + glyph->fMaskFormat = fRec.fMaskFormat; + glyph->zeroMetrics(); + } + void generateImage(const SkGlyph& glyph) override {} + bool generatePath(const SkGlyph& glyph, SkPath* path) override { + path->reset(); + return false; + } + void generateFontMetrics(SkFontMetrics* metrics) override { + if (metrics) { + sk_bzero(metrics, sizeof(*metrics)); + } + } + }; + + return std::make_unique(std::move(typeface), effects, desc); +} + + + + diff --git a/gfx/skia/skia/src/core/SkScalerContext.h b/gfx/skia/skia/src/core/SkScalerContext.h new file mode 100644 index 0000000000..47470fe23b --- /dev/null +++ b/gfx/skia/skia/src/core/SkScalerContext.h @@ -0,0 +1,464 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkScalerContext_DEFINED +#define SkScalerContext_DEFINED + +#include + +#include "include/core/SkFont.h" +#include "include/core/SkFontTypes.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkMacros.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskGamma.h" +#include "src/core/SkSurfacePriv.h" +#include "src/core/SkWriteBuffer.h" + +class SkAutoDescriptor; +class SkDescriptor; +class SkMaskFilter; +class SkPathEffect; +class SkScalerContext; +class SkScalerContext_DW; + +enum class SkScalerContextFlags : uint32_t { + kNone = 0, + kFakeGamma = 1 << 0, + kBoostContrast = 1 << 1, + kFakeGammaAndBoostContrast = kFakeGamma | kBoostContrast, +}; +SK_MAKE_BITFIELD_OPS(SkScalerContextFlags) + +/* + * To allow this to be forward-declared, it must be its own typename, rather + * than a nested struct inside SkScalerContext (where it started). + * + * SkScalerContextRec must be dense, and all bytes must be set to a know quantity because this + * structure is used to calculate a checksum. + */ +SK_BEGIN_REQUIRE_DENSE +struct SkScalerContextRec { + SkTypefaceID fTypefaceID; + SkScalar fTextSize, fPreScaleX, fPreSkewX; + SkScalar fPost2x2[2][2]; + SkScalar fFrameWidth, fMiterLimit; + + // This will be set if to the paint's foreground color if + // kNeedsForegroundColor is set, which will usually be the case for COLRv0 and + // COLRv1 fonts. + uint32_t fForegroundColor{SK_ColorBLACK}; + +private: + //These describe the parameters to create (uniquely identify) the pre-blend. + uint32_t fLumBits; + uint8_t fDeviceGamma; //2.6, (0.0, 4.0) gamma, 0.0 for sRGB + uint8_t fPaintGamma; //2.6, (0.0, 4.0) gamma, 0.0 for sRGB + uint8_t fContrast; //0.8+1, [0.0, 1.0] artificial contrast + const uint8_t fReservedAlign{0}; + +public: + + SkScalar getDeviceGamma() const { + return SkIntToScalar(fDeviceGamma) / (1 << 6); + } + void setDeviceGamma(SkScalar dg) { + SkASSERT(0 <= dg && dg < SkIntToScalar(4)); + fDeviceGamma = SkScalarFloorToInt(dg * (1 << 6)); + } + + SkScalar getPaintGamma() const { + return SkIntToScalar(fPaintGamma) / (1 << 6); + } + void setPaintGamma(SkScalar pg) { + SkASSERT(0 <= pg && pg < SkIntToScalar(4)); + fPaintGamma = SkScalarFloorToInt(pg * (1 << 6)); + } + + SkScalar getContrast() const { + sk_ignore_unused_variable(fReservedAlign); + return SkIntToScalar(fContrast) / ((1 << 8) - 1); + } + void setContrast(SkScalar c) { + SkASSERT(0 <= c && c <= SK_Scalar1); + fContrast = SkScalarRoundToInt(c * ((1 << 8) - 1)); + } + + /** + * Causes the luminance color to be ignored, and the paint and device + * gamma to be effectively 1.0 + */ + void ignoreGamma() { + setLuminanceColor(SK_ColorTRANSPARENT); + setPaintGamma(SK_Scalar1); + setDeviceGamma(SK_Scalar1); + } + + /** + * Causes the luminance color and contrast to be ignored, and the + * paint and device gamma to be effectively 1.0. + */ + void ignorePreBlend() { + ignoreGamma(); + setContrast(0); + } + + SkMask::Format fMaskFormat; + +private: + uint8_t fStrokeJoin : 4; + uint8_t fStrokeCap : 4; + +public: + uint16_t fFlags; + + // Warning: when adding members note that the size of this structure + // must be a multiple of 4. SkDescriptor requires that its arguments be + // multiples of four and this structure is put in an SkDescriptor in + // SkPaint::MakeRecAndEffects. + + SkString dump() const { + SkString msg; + msg.appendf(" Rec\n"); + msg.appendf(" textsize %a prescale %a preskew %a post [%a %a %a %a]\n", + fTextSize, fPreScaleX, fPreSkewX, fPost2x2[0][0], + fPost2x2[0][1], fPost2x2[1][0], fPost2x2[1][1]); + msg.appendf(" frame %g miter %g format %d join %d cap %d flags %#hx\n", + fFrameWidth, fMiterLimit, fMaskFormat, fStrokeJoin, fStrokeCap, fFlags); + msg.appendf(" lum bits %x, device gamma %d, paint gamma %d contrast %d\n", fLumBits, + fDeviceGamma, fPaintGamma, fContrast); + msg.appendf(" foreground color %x\n", fForegroundColor); + return msg; + } + + void getMatrixFrom2x2(SkMatrix*) const; + void getLocalMatrix(SkMatrix*) const; + void getSingleMatrix(SkMatrix*) const; + + /** The kind of scale which will be applied by the underlying port (pre-matrix). */ + enum class PreMatrixScale { + kFull, // The underlying port can apply both x and y scale. + kVertical, // The underlying port can only apply a y scale. + kVerticalInteger // The underlying port can only apply an integer y scale. + }; + /** + * Compute useful matrices for use with sizing in underlying libraries. + * + * There are two kinds of text size, a 'requested/logical size' which is like asking for size + * '12' and a 'real' size which is the size after the matrix is applied. The matrices produced + * by this method are based on the 'real' size. This method effectively finds the total device + * matrix and decomposes it in various ways. + * + * The most useful decomposition is into 'scale' and 'remaining'. The 'scale' is applied first + * and then the 'remaining' to fully apply the total matrix. This decomposition is useful when + * the text size ('scale') may have meaning apart from the total matrix. This is true when + * hinting, and sometimes true for other properties as well. + * + * The second (optional) decomposition is of 'remaining' into a non-rotational part + * 'remainingWithoutRotation' and a rotational part 'remainingRotation'. The 'scale' is applied + * first, then 'remainingWithoutRotation', then 'remainingRotation' to fully apply the total + * matrix. This decomposition is helpful when only horizontal metrics can be trusted, so the + * 'scale' and 'remainingWithoutRotation' will be handled by the underlying library, but + * the final rotation 'remainingRotation' will be handled manually. + * + * The 'total' matrix is also (optionally) available. This is useful in cases where the + * underlying library will not be used, often when working directly with font data. + * + * The parameters 'scale' and 'remaining' are required, the other pointers may be nullptr. + * + * @param preMatrixScale the kind of scale to extract from the total matrix. + * @param scale the scale extracted from the total matrix (both values positive). + * @param remaining apply after scale to apply the total matrix. + * @param remainingWithoutRotation apply after scale to apply the total matrix sans rotation. + * @param remainingRotation apply after remainingWithoutRotation to apply the total matrix. + * @param total the total matrix. + * @return false if the matrix was singular. The output will be valid but not invertible. + */ + bool computeMatrices(PreMatrixScale preMatrixScale, + SkVector* scale, SkMatrix* remaining, + SkMatrix* remainingWithoutRotation = nullptr, + SkMatrix* remainingRotation = nullptr, + SkMatrix* total = nullptr); + + SkAxisAlignment computeAxisAlignmentForHText() const; + + inline SkFontHinting getHinting() const; + inline void setHinting(SkFontHinting); + + SkMask::Format getFormat() const { + return fMaskFormat; + } + + SkColor getLuminanceColor() const { + return fLumBits; + } + + // setLuminanceColor forces the alpha to be 0xFF because the blitter that draws the glyph + // will apply the alpha from the paint. Don't apply the alpha twice. + void setLuminanceColor(SkColor c); + +private: + // TODO: remove + friend class SkScalerContext; +}; +SK_END_REQUIRE_DENSE + +// TODO: rename SkScalerContextEffects -> SkStrikeEffects +struct SkScalerContextEffects { + SkScalerContextEffects() : fPathEffect(nullptr), fMaskFilter(nullptr) {} + SkScalerContextEffects(SkPathEffect* pe, SkMaskFilter* mf) + : fPathEffect(pe), fMaskFilter(mf) {} + explicit SkScalerContextEffects(const SkPaint& paint) + : fPathEffect(paint.getPathEffect()) + , fMaskFilter(paint.getMaskFilter()) {} + + SkPathEffect* fPathEffect; + SkMaskFilter* fMaskFilter; +}; + +//The following typedef hides from the rest of the implementation the number of +//most significant bits to consider when creating mask gamma tables. Two bits +//per channel was chosen as a balance between fidelity (more bits) and cache +//sizes (fewer bits). Three bits per channel was chosen when #303942; (used by +//the Chrome UI) turned out too green. +typedef SkTMaskGamma<3, 3, 3> SkMaskGamma; + +class SkScalerContext { +public: + enum Flags { + kFrameAndFill_Flag = 0x0001, + kUnused = 0x0002, + kEmbeddedBitmapText_Flag = 0x0004, + kEmbolden_Flag = 0x0008, + kSubpixelPositioning_Flag = 0x0010, + kForceAutohinting_Flag = 0x0020, // Use auto instead of bytcode hinting if hinting. + + // together, these two flags resulting in a two bit value which matches + // up with the SkPaint::Hinting enum. + kHinting_Shift = 7, // to shift into the other flags above + kHintingBit1_Flag = 0x0080, + kHintingBit2_Flag = 0x0100, + + // Pixel geometry information. + // only meaningful if fMaskFormat is kLCD16 + kLCD_Vertical_Flag = 0x0200, // else Horizontal + kLCD_BGROrder_Flag = 0x0400, // else RGB order + + // Generate A8 from LCD source (for GDI and CoreGraphics). + // only meaningful if fMaskFormat is kA8 + kGenA8FromLCD_Flag = 0x0800, // could be 0x200 (bit meaning dependent on fMaskFormat) + kLinearMetrics_Flag = 0x1000, + kBaselineSnap_Flag = 0x2000, + + kNeedsForegroundColor_Flag = 0x4000, + + kLightOnDark_Flag = 0x8000, // Moz + Mac only, used to distinguish different mask dilations + }; + + // computed values + enum { + kHinting_Mask = kHintingBit1_Flag | kHintingBit2_Flag, + }; + + SkScalerContext(sk_sp, const SkScalerContextEffects&, const SkDescriptor*); + virtual ~SkScalerContext(); + + SkTypeface* getTypeface() const { return fTypeface.get(); } + + SkMask::Format getMaskFormat() const { + return fRec.fMaskFormat; + } + + bool isSubpixel() const { + return SkToBool(fRec.fFlags & kSubpixelPositioning_Flag); + } + + bool isLinearMetrics() const { + return SkToBool(fRec.fFlags & kLinearMetrics_Flag); + } + + // DEPRECATED + bool isVertical() const { return false; } + + SkGlyph makeGlyph(SkPackedGlyphID, SkArenaAlloc*); + void getImage(const SkGlyph&); + void getPath(SkGlyph&, SkArenaAlloc*); + sk_sp getDrawable(SkGlyph&); + void getFontMetrics(SkFontMetrics*); + + /** Return the size in bytes of the associated gamma lookup table + */ + static size_t GetGammaLUTSize(SkScalar contrast, SkScalar paintGamma, SkScalar deviceGamma, + int* width, int* height); + + /** Get the associated gamma lookup table. The 'data' pointer must point to pre-allocated + * memory, with size in bytes greater than or equal to the return value of getGammaLUTSize(). + * + * If the lookup table hasn't been initialized (e.g., it's linear), this will return false. + */ + static bool GetGammaLUTData(SkScalar contrast, SkScalar paintGamma, SkScalar deviceGamma, + uint8_t* data); + + static void MakeRecAndEffects(const SkFont& font, const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix, + SkScalerContextRec* rec, + SkScalerContextEffects* effects); + + // If we are creating rec and effects from a font only, then there is no device around either. + static void MakeRecAndEffectsFromFont(const SkFont& font, + SkScalerContextRec* rec, + SkScalerContextEffects* effects) { + SkPaint paint; + return MakeRecAndEffects( + font, paint, SkSurfaceProps(), + SkScalerContextFlags::kNone, SkMatrix::I(), rec, effects); + } + + static std::unique_ptr MakeEmpty( + sk_sp typeface, const SkScalerContextEffects& effects, + const SkDescriptor* desc); + + static SkDescriptor* AutoDescriptorGivenRecAndEffects( + const SkScalerContextRec& rec, + const SkScalerContextEffects& effects, + SkAutoDescriptor* ad); + + static std::unique_ptr DescriptorGivenRecAndEffects( + const SkScalerContextRec& rec, + const SkScalerContextEffects& effects); + + static void DescriptorBufferGiveRec(const SkScalerContextRec& rec, void* buffer); + static bool CheckBufferSizeForRec(const SkScalerContextRec& rec, + const SkScalerContextEffects& effects, + size_t size); + + static SkMaskGamma::PreBlend GetMaskPreBlend(const SkScalerContextRec& rec); + + const SkScalerContextRec& getRec() const { return fRec; } + + SkScalerContextEffects getEffects() const { + return { fPathEffect.get(), fMaskFilter.get() }; + } + + /** + * Return the axis (if any) that the baseline for horizontal text should land on. + * As an example, the identity matrix will return SkAxisAlignment::kX. + */ + SkAxisAlignment computeAxisAlignmentForHText() const; + + static SkDescriptor* CreateDescriptorAndEffectsUsingPaint( + const SkFont&, const SkPaint&, const SkSurfaceProps&, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix, SkAutoDescriptor* ad, + SkScalerContextEffects* effects); + +protected: + SkScalerContextRec fRec; + + /** Generates the contents of glyph.fAdvanceX and glyph.fAdvanceY if it can do so quickly. + * Returns true if it could, false otherwise. + */ + virtual bool generateAdvance(SkGlyph* glyph) = 0; + + /** Generates the contents of glyph.fWidth, fHeight, fTop, fLeft, + * as well as fAdvanceX and fAdvanceY if not already set. + * The fMaskFormat will already be set to a requested format but may be changed. + */ + virtual void generateMetrics(SkGlyph* glyph, SkArenaAlloc*) = 0; + static bool GenerateMetricsFromPath( + SkGlyph* glyph, const SkPath& path, SkMask::Format format, + bool verticalLCD, bool a8FromLCD, bool hairline); + + /** Generates the contents of glyph.fImage. + * When called, glyph.fImage will be pointing to a pre-allocated, + * uninitialized region of memory of size glyph.imageSize(). + * This method may not change glyph.fMaskFormat. + * + * Because glyph.imageSize() will determine the size of fImage, + * generateMetrics will be called before generateImage. + */ + virtual void generateImage(const SkGlyph& glyph) = 0; + static void GenerateImageFromPath( + const SkMask& mask, const SkPath& path, const SkMaskGamma::PreBlend& maskPreBlend, + bool doBGR, bool verticalLCD, bool a8FromLCD, bool hairline); + + /** Sets the passed path to the glyph outline. + * If this cannot be done the path is set to empty; + * Does not apply subpixel positioning to the path. + * @return false if this glyph does not have any path. + */ + virtual bool SK_WARN_UNUSED_RESULT generatePath(const SkGlyph&, SkPath*) = 0; + + /** Returns the drawable for the glyph (if any). + * + * The generated drawable will be lifetime scoped to the lifetime of this scaler context. + * This means the drawable may refer to the scaler context and associated font data. + * + * The drawable does not need to be flattenable (e.g. implement getFactory and getTypeName). + * Any necessary serialization will be done with newPictureSnapshot. + */ + virtual sk_sp generateDrawable(const SkGlyph&); // TODO: = 0 + + /** Retrieves font metrics. */ + virtual void generateFontMetrics(SkFontMetrics*) = 0; + + void forceGenerateImageFromPath() { fGenerateImageFromPath = true; } + void forceOffGenerateImageFromPath() { fGenerateImageFromPath = false; } + +private: + friend class PathText; // For debug purposes + friend class PathTextBench; // For debug purposes + friend class RandomScalerContext; // For debug purposes + + static SkScalerContextRec PreprocessRec(const SkTypeface&, + const SkScalerContextEffects&, + const SkDescriptor&); + + // never null + sk_sp fTypeface; + + // optional objects, which may be null + sk_sp fPathEffect; + sk_sp fMaskFilter; + + // if this is set, we draw the image from a path, rather than + // calling generateImage. + bool fGenerateImageFromPath; + + void internalGetPath(SkGlyph&, SkArenaAlloc*); + SkGlyph internalMakeGlyph(SkPackedGlyphID, SkMask::Format, SkArenaAlloc*); + +protected: + // SkMaskGamma::PreBlend converts linear masks to gamma correcting masks. + // Visible to subclasses so that generateImage can apply the pre-blend directly. + const SkMaskGamma::PreBlend fPreBlend; +}; + +#define kRec_SkDescriptorTag SkSetFourByteTag('s', 'r', 'e', 'c') +#define kEffects_SkDescriptorTag SkSetFourByteTag('e', 'f', 'c', 't') + +/////////////////////////////////////////////////////////////////////////////// + +SkFontHinting SkScalerContextRec::getHinting() const { + unsigned hint = (fFlags & SkScalerContext::kHinting_Mask) >> + SkScalerContext::kHinting_Shift; + return static_cast(hint); +} + +void SkScalerContextRec::setHinting(SkFontHinting hinting) { + fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) | + (static_cast(hinting) << SkScalerContext::kHinting_Shift); +} + + +#endif diff --git a/gfx/skia/skia/src/core/SkScan.cpp b/gfx/skia/skia/src/core/SkScan.cpp new file mode 100644 index 0000000000..b93f5f4f07 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan.cpp @@ -0,0 +1,111 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#include "src/core/SkBlitter.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkScan.h" + +std::atomic gSkUseAnalyticAA{true}; +std::atomic gSkForceAnalyticAA{false}; + +static inline void blitrect(SkBlitter* blitter, const SkIRect& r) { + blitter->blitRect(r.fLeft, r.fTop, r.width(), r.height()); +} + +void SkScan::FillIRect(const SkIRect& r, const SkRegion* clip, + SkBlitter* blitter) { + if (!r.isEmpty()) { + if (clip) { + if (clip->isRect()) { + const SkIRect& clipBounds = clip->getBounds(); + + if (clipBounds.contains(r)) { + blitrect(blitter, r); + } else { + SkIRect rr = r; + if (rr.intersect(clipBounds)) { + blitrect(blitter, rr); + } + } + } else { + SkRegion::Cliperator cliper(*clip, r); + const SkIRect& rr = cliper.rect(); + + while (!cliper.done()) { + blitrect(blitter, rr); + cliper.next(); + } + } + } else { + blitrect(blitter, r); + } + } +} + +void SkScan::FillXRect(const SkXRect& xr, const SkRegion* clip, + SkBlitter* blitter) { + SkIRect r; + + XRect_round(xr, &r); + SkScan::FillIRect(r, clip, blitter); +} + +void SkScan::FillRect(const SkRect& r, const SkRegion* clip, + SkBlitter* blitter) { + SkIRect ir; + + r.round(&ir); + SkScan::FillIRect(ir, clip, blitter); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkScan::FillIRect(const SkIRect& r, const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isEmpty() || r.isEmpty()) { + return; + } + + if (clip.isBW()) { + FillIRect(r, &clip.bwRgn(), blitter); + return; + } + + SkAAClipBlitterWrapper wrapper(clip, blitter); + FillIRect(r, &wrapper.getRgn(), wrapper.getBlitter()); +} + +void SkScan::FillXRect(const SkXRect& xr, const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isEmpty() || xr.isEmpty()) { + return; + } + + if (clip.isBW()) { + FillXRect(xr, &clip.bwRgn(), blitter); + return; + } + + SkAAClipBlitterWrapper wrapper(clip, blitter); + FillXRect(xr, &wrapper.getRgn(), wrapper.getBlitter()); +} + +void SkScan::FillRect(const SkRect& r, const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isEmpty() || r.isEmpty()) { + return; + } + + if (clip.isBW()) { + FillRect(r, &clip.bwRgn(), blitter); + return; + } + + SkAAClipBlitterWrapper wrapper(clip, blitter); + FillRect(r, &wrapper.getRgn(), wrapper.getBlitter()); +} diff --git a/gfx/skia/skia/src/core/SkScan.h b/gfx/skia/skia/src/core/SkScan.h new file mode 100644 index 0000000000..635c6452b9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan.h @@ -0,0 +1,142 @@ +/* + * Copyright 2011 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkScan_DEFINED +#define SkScan_DEFINED + +#include "include/core/SkRect.h" +#include "include/private/base/SkFixed.h" +#include + +class SkRasterClip; +class SkRegion; +class SkBlitter; +class SkPath; + +/** Defines a fixed-point rectangle, identical to the integer SkIRect, but its + coordinates are treated as SkFixed rather than int32_t. +*/ +typedef SkIRect SkXRect; + +extern std::atomic gSkUseAnalyticAA; +extern std::atomic gSkForceAnalyticAA; + +class AdditiveBlitter; + +class SkScan { +public: + /* + * Draws count-1 line segments, one at a time: + * line(pts[0], pts[1]) + * line(pts[1], pts[2]) + * line(......, pts[count - 1]) + */ + typedef void (*HairRgnProc)(const SkPoint[], int count, const SkRegion*, SkBlitter*); + typedef void (*HairRCProc)(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); + + static void FillPath(const SkPath&, const SkIRect&, SkBlitter*); + + // Paths of a certain size cannot be anti-aliased unless externally tiled (handled by SkDraw). + // SkBitmapDevice automatically tiles, SkAAClip does not so SkRasterClipStack converts AA clips + // to BW clips if that's the case. SkRegion uses this to know when to tile and union smaller + // SkRegions together. + static bool PathRequiresTiling(const SkIRect& bounds); + + /////////////////////////////////////////////////////////////////////////// + // rasterclip + + static void FillIRect(const SkIRect&, const SkRasterClip&, SkBlitter*); + static void FillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); + static void FillRect(const SkRect&, const SkRasterClip&, SkBlitter*); + static void AntiFillRect(const SkRect&, const SkRasterClip&, SkBlitter*); + static void AntiFillXRect(const SkXRect&, const SkRasterClip&, SkBlitter*); + static void FillPath(const SkPath&, const SkRasterClip&, SkBlitter*); + static void AntiFillPath(const SkPath&, const SkRasterClip&, SkBlitter*); + static void FrameRect(const SkRect&, const SkPoint& strokeSize, + const SkRasterClip&, SkBlitter*); + static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, + const SkRasterClip&, SkBlitter*); + static void FillTriangle(const SkPoint pts[], const SkRasterClip&, SkBlitter*); + static void HairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); + static void AntiHairLine(const SkPoint[], int count, const SkRasterClip&, SkBlitter*); + static void HairRect(const SkRect&, const SkRasterClip&, SkBlitter*); + static void AntiHairRect(const SkRect&, const SkRasterClip&, SkBlitter*); + static void HairPath(const SkPath&, const SkRasterClip&, SkBlitter*); + static void AntiHairPath(const SkPath&, const SkRasterClip&, SkBlitter*); + static void HairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); + static void AntiHairSquarePath(const SkPath&, const SkRasterClip&, SkBlitter*); + static void HairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*); + static void AntiHairRoundPath(const SkPath&, const SkRasterClip&, SkBlitter*); + + // Needed by SkRegion::setPath + static void FillPath(const SkPath&, const SkRegion& clip, SkBlitter*); + +private: + friend class SkAAClip; + friend class SkRegion; + + static void FillIRect(const SkIRect&, const SkRegion* clip, SkBlitter*); + static void FillXRect(const SkXRect&, const SkRegion* clip, SkBlitter*); + static void FillRect(const SkRect&, const SkRegion* clip, SkBlitter*); + static void AntiFillRect(const SkRect&, const SkRegion* clip, SkBlitter*); + static void AntiFillXRect(const SkXRect&, const SkRegion*, SkBlitter*); + static void AntiFillPath(const SkPath&, const SkRegion& clip, SkBlitter*, bool forceRLE); + static void FillTriangle(const SkPoint pts[], const SkRegion*, SkBlitter*); + + static void AntiFrameRect(const SkRect&, const SkPoint& strokeSize, + const SkRegion*, SkBlitter*); + static void HairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); + static void AntiHairLineRgn(const SkPoint[], int count, const SkRegion*, SkBlitter*); + static void AAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, + const SkIRect& clipBounds, bool forceRLE); + static void SAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& pathIR, + const SkIRect& clipBounds, bool forceRLE); +}; + +/** Assign an SkXRect from a SkIRect, by promoting the src rect's coordinates + from int to SkFixed. Does not check for overflow if the src coordinates + exceed 32K +*/ +static inline void XRect_set(SkXRect* xr, const SkIRect& src) { + xr->fLeft = SkIntToFixed(src.fLeft); + xr->fTop = SkIntToFixed(src.fTop); + xr->fRight = SkIntToFixed(src.fRight); + xr->fBottom = SkIntToFixed(src.fBottom); +} + +/** Assign an SkXRect from a SkRect, by promoting the src rect's coordinates + from SkScalar to SkFixed. Does not check for overflow if the src coordinates + exceed 32K +*/ +static inline void XRect_set(SkXRect* xr, const SkRect& src) { + xr->fLeft = SkScalarToFixed(src.fLeft); + xr->fTop = SkScalarToFixed(src.fTop); + xr->fRight = SkScalarToFixed(src.fRight); + xr->fBottom = SkScalarToFixed(src.fBottom); +} + +/** Round the SkXRect coordinates, and store the result in the SkIRect. +*/ +static inline void XRect_round(const SkXRect& xr, SkIRect* dst) { + dst->fLeft = SkFixedRoundToInt(xr.fLeft); + dst->fTop = SkFixedRoundToInt(xr.fTop); + dst->fRight = SkFixedRoundToInt(xr.fRight); + dst->fBottom = SkFixedRoundToInt(xr.fBottom); +} + +/** Round the SkXRect coordinates out (i.e. use floor for left/top, and ceiling + for right/bottom), and store the result in the SkIRect. +*/ +static inline void XRect_roundOut(const SkXRect& xr, SkIRect* dst) { + dst->fLeft = SkFixedFloorToInt(xr.fLeft); + dst->fTop = SkFixedFloorToInt(xr.fTop); + dst->fRight = SkFixedCeilToInt(xr.fRight); + dst->fBottom = SkFixedCeilToInt(xr.fBottom); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkScanPriv.h b/gfx/skia/skia/src/core/SkScanPriv.h new file mode 100644 index 0000000000..929dd30afe --- /dev/null +++ b/gfx/skia/skia/src/core/SkScanPriv.h @@ -0,0 +1,83 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkScanPriv_DEFINED +#define SkScanPriv_DEFINED + +#include "include/core/SkPath.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkScan.h" + +// controls how much we super-sample (when we use that scan convertion) +#define SK_SUPERSAMPLE_SHIFT 2 + +class SkScanClipper { +public: + SkScanClipper(SkBlitter* blitter, const SkRegion* clip, const SkIRect& bounds, + bool skipRejectTest = false, bool boundsPreClipped = false); + + SkBlitter* getBlitter() const { return fBlitter; } + const SkIRect* getClipRect() const { return fClipRect; } + +private: + SkRectClipBlitter fRectBlitter; + SkRgnClipBlitter fRgnBlitter; +#ifdef SK_DEBUG + SkRectClipCheckBlitter fRectClipCheckBlitter; +#endif + SkBlitter* fBlitter; + const SkIRect* fClipRect; +}; + +void sk_fill_path(const SkPath& path, const SkIRect& clipRect, + SkBlitter* blitter, int start_y, int stop_y, int shiftEdgesUp, + bool pathContainedInClip); + +// blit the rects above and below avoid, clipped to clip +void sk_blit_above(SkBlitter*, const SkIRect& avoid, const SkRegion& clip); +void sk_blit_below(SkBlitter*, const SkIRect& avoid, const SkRegion& clip); + +template +static inline void remove_edge(EdgeType* edge) { + edge->fPrev->fNext = edge->fNext; + edge->fNext->fPrev = edge->fPrev; +} + +template +static inline void insert_edge_after(EdgeType* edge, EdgeType* afterMe) { + edge->fPrev = afterMe; + edge->fNext = afterMe->fNext; + afterMe->fNext->fPrev = edge; + afterMe->fNext = edge; +} + +template +void backward_insert_edge_based_on_x(EdgeType* edge) { + SkFixed x = edge->fX; + EdgeType* prev = edge->fPrev; + while (prev->fPrev && prev->fX > x) { + prev = prev->fPrev; + } + if (prev->fNext != edge) { + remove_edge(edge); + insert_edge_after(edge, prev); + } +} + +// Start from the right side, searching backwards for the point to begin the new edge list +// insertion, marching forwards from here. The implementation could have started from the left +// of the prior insertion, and search to the right, or with some additional caching, binary +// search the starting point. More work could be done to determine optimal new edge insertion. +template +EdgeType* backward_insert_start(EdgeType* prev, SkFixed x) { + while (prev->fPrev && prev->fX > x) { + prev = prev->fPrev; + } + return prev; +} + +#endif diff --git a/gfx/skia/skia/src/core/SkScan_AAAPath.cpp b/gfx/skia/skia/src/core/SkScan_AAAPath.cpp new file mode 100644 index 0000000000..0e7ff978a3 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan_AAAPath.cpp @@ -0,0 +1,2033 @@ +/* + * Copyright 2016 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" +#include "include/core/SkRegion.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkAutoMalloc.h" +#include "src/base/SkTSort.h" +#include "src/core/SkAnalyticEdge.h" +#include "src/core/SkAntiRun.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkEdge.h" +#include "src/core/SkEdgeBuilder.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkQuadClipper.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkScan.h" +#include "src/core/SkScanPriv.h" + +#include + +#if defined(SK_DISABLE_AAA) +void SkScan::AAAFillPath(const SkPath&, SkBlitter*, const SkIRect&, const SkIRect&, bool) { + SkDEBUGFAIL("AAA Disabled"); + return; +} +#else + +/* + +The following is a high-level overview of our analytic anti-aliasing +algorithm. We consider a path as a collection of line segments, as +quadratic/cubic curves are converted to small line segments. Without loss of +generality, let's assume that the draw region is [0, W] x [0, H]. + +Our algorithm is based on horizontal scan lines (y = c_i) as the previous +sampling-based algorithm did. However, our algorithm uses non-equal-spaced +scan lines, while the previous method always uses equal-spaced scan lines, +such as (y = 1/2 + 0, 1/2 + 1, 1/2 + 2, ...) in the previous non-AA algorithm, +and (y = 1/8 + 1/4, 1/8 + 2/4, 1/8 + 3/4, ...) in the previous +16-supersampling AA algorithm. + +Our algorithm contains scan lines y = c_i for c_i that is either: + +1. an integer between [0, H] + +2. the y value of a line segment endpoint + +3. the y value of an intersection of two line segments + +For two consecutive scan lines y = c_i, y = c_{i+1}, we analytically computes +the coverage of this horizontal strip of our path on each pixel. This can be +done very efficiently because the strip of our path now only consists of +trapezoids whose top and bottom edges are y = c_i, y = c_{i+1} (this includes +rectangles and triangles as special cases). + +We now describe how the coverage of single pixel is computed against such a +trapezoid. That coverage is essentially the intersection area of a rectangle +(e.g., [0, 1] x [c_i, c_{i+1}]) and our trapezoid. However, that intersection +could be complicated, as shown in the example region A below: + ++-----------\----+ +| \ C| +| \ | +\ \ | +|\ A \| +| \ \ +| \ | +| B \ | ++----\-----------+ + +However, we don't have to compute the area of A directly. Instead, we can +compute the excluded area, which are B and C, quite easily, because they're +just triangles. In fact, we can prove that an excluded region (take B as an +example) is either itself a simple trapezoid (including rectangles, triangles, +and empty regions), or its opposite (the opposite of B is A + C) is a simple +trapezoid. In any case, we can compute its area efficiently. + +In summary, our algorithm has a higher quality because it generates ground- +truth coverages analytically. It is also faster because it has much fewer +unnessasary horizontal scan lines. For example, given a triangle path, the +number of scan lines in our algorithm is only about 3 + H while the +16-supersampling algorithm has about 4H scan lines. + +*/ + +static void add_alpha(SkAlpha* alpha, SkAlpha delta) { + SkASSERT(*alpha + delta <= 256); + *alpha = SkAlphaRuns::CatchOverflow(*alpha + delta); +} + +static void safely_add_alpha(SkAlpha* alpha, SkAlpha delta) { + *alpha = std::min(0xFF, *alpha + delta); +} + +class AdditiveBlitter : public SkBlitter { +public: + ~AdditiveBlitter() override {} + + virtual SkBlitter* getRealBlitter(bool forceRealBlitter = false) = 0; + + virtual void blitAntiH(int x, int y, const SkAlpha antialias[], int len) = 0; + virtual void blitAntiH(int x, int y, const SkAlpha alpha) = 0; + virtual void blitAntiH(int x, int y, int width, const SkAlpha alpha) = 0; + + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override { + SkDEBUGFAIL("Please call real blitter's blitAntiH instead."); + } + + void blitV(int x, int y, int height, SkAlpha alpha) override { + SkDEBUGFAIL("Please call real blitter's blitV instead."); + } + + void blitH(int x, int y, int width) override { + SkDEBUGFAIL("Please call real blitter's blitH instead."); + } + + void blitRect(int x, int y, int width, int height) override { + SkDEBUGFAIL("Please call real blitter's blitRect instead."); + } + + void blitAntiRect(int x, int y, int width, int height, SkAlpha leftAlpha, SkAlpha rightAlpha) + override { + SkDEBUGFAIL("Please call real blitter's blitAntiRect instead."); + } + + virtual int getWidth() = 0; + + // Flush the additive alpha cache if floor(y) and floor(nextY) is different + // (i.e., we'll start working on a new pixel row). + virtual void flush_if_y_changed(SkFixed y, SkFixed nextY) = 0; +}; + +// We need this mask blitter because it significantly accelerates small path filling. +class MaskAdditiveBlitter : public AdditiveBlitter { +public: + MaskAdditiveBlitter(SkBlitter* realBlitter, + const SkIRect& ir, + const SkIRect& clipBounds, + bool isInverse); + ~MaskAdditiveBlitter() override { fRealBlitter->blitMask(fMask, fClipRect); } + + // Most of the time, we still consider this mask blitter as the real blitter + // so we can accelerate blitRect and others. But sometimes we want to return + // the absolute real blitter (e.g., when we fall back to the old code path). + SkBlitter* getRealBlitter(bool forceRealBlitter) override { + return forceRealBlitter ? fRealBlitter : this; + } + + // Virtual function is slow. So don't use this. Directly add alpha to the mask instead. + void blitAntiH(int x, int y, const SkAlpha antialias[], int len) override; + + // Allowing following methods are used to blit rectangles during aaa_walk_convex_edges + // Since there aren't many rectangles, we can still bear the slow speed of virtual functions. + void blitAntiH(int x, int y, const SkAlpha alpha) override; + void blitAntiH(int x, int y, int width, const SkAlpha alpha) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitRect(int x, int y, int width, int height) override; + void blitAntiRect(int x, int y, int width, int height, SkAlpha leftAlpha, SkAlpha rightAlpha) + override; + + // The flush is only needed for RLE (RunBasedAdditiveBlitter) + void flush_if_y_changed(SkFixed y, SkFixed nextY) override {} + + int getWidth() override { return fClipRect.width(); } + + static bool CanHandleRect(const SkIRect& bounds) { + int width = bounds.width(); + if (width > MaskAdditiveBlitter::kMAX_WIDTH) { + return false; + } + int64_t rb = SkAlign4(width); + // use 64bits to detect overflow + int64_t storage = rb * bounds.height(); + + return (width <= MaskAdditiveBlitter::kMAX_WIDTH) && + (storage <= MaskAdditiveBlitter::kMAX_STORAGE); + } + + // Return a pointer where pointer[x] corresonds to the alpha of (x, y) + uint8_t* getRow(int y) { + if (y != fY) { + fY = y; + fRow = fMask.fImage + (y - fMask.fBounds.fTop) * fMask.fRowBytes - fMask.fBounds.fLeft; + } + return fRow; + } + +private: + // so we don't try to do very wide things, where the RLE blitter would be faster + static const int kMAX_WIDTH = 32; + static const int kMAX_STORAGE = 1024; + + SkBlitter* fRealBlitter; + SkMask fMask; + SkIRect fClipRect; + // we add 2 because we can write 1 extra byte at either end due to precision error + uint32_t fStorage[(kMAX_STORAGE >> 2) + 2]; + + uint8_t* fRow; + int fY; +}; + +MaskAdditiveBlitter::MaskAdditiveBlitter(SkBlitter* realBlitter, + const SkIRect& ir, + const SkIRect& clipBounds, + bool isInverse) { + SkASSERT(CanHandleRect(ir)); + SkASSERT(!isInverse); + + fRealBlitter = realBlitter; + + fMask.fImage = (uint8_t*)fStorage + 1; // There's 1 extra byte at either end of fStorage + fMask.fBounds = ir; + fMask.fRowBytes = ir.width(); + fMask.fFormat = SkMask::kA8_Format; + + fY = ir.fTop - 1; + fRow = nullptr; + + fClipRect = ir; + if (!fClipRect.intersect(clipBounds)) { + SkASSERT(0); + fClipRect.setEmpty(); + } + + memset(fStorage, 0, fMask.fBounds.height() * fMask.fRowBytes + 2); +} + +void MaskAdditiveBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], int len) { + SK_ABORT("Don't use this; directly add alphas to the mask."); +} + +void MaskAdditiveBlitter::blitAntiH(int x, int y, const SkAlpha alpha) { + SkASSERT(x >= fMask.fBounds.fLeft - 1); + add_alpha(&this->getRow(y)[x], alpha); +} + +void MaskAdditiveBlitter::blitAntiH(int x, int y, int width, const SkAlpha alpha) { + SkASSERT(x >= fMask.fBounds.fLeft - 1); + uint8_t* row = this->getRow(y); + for (int i = 0; i < width; ++i) { + add_alpha(&row[x + i], alpha); + } +} + +void MaskAdditiveBlitter::blitV(int x, int y, int height, SkAlpha alpha) { + if (alpha == 0) { + return; + } + SkASSERT(x >= fMask.fBounds.fLeft - 1); + // This must be called as if this is a real blitter. + // So we directly set alpha rather than adding it. + uint8_t* row = this->getRow(y); + for (int i = 0; i < height; ++i) { + row[x] = alpha; + row += fMask.fRowBytes; + } +} + +void MaskAdditiveBlitter::blitRect(int x, int y, int width, int height) { + SkASSERT(x >= fMask.fBounds.fLeft - 1); + // This must be called as if this is a real blitter. + // So we directly set alpha rather than adding it. + uint8_t* row = this->getRow(y); + for (int i = 0; i < height; ++i) { + memset(row + x, 0xFF, width); + row += fMask.fRowBytes; + } +} + +void MaskAdditiveBlitter::blitAntiRect(int x, + int y, + int width, + int height, + SkAlpha leftAlpha, + SkAlpha rightAlpha) { + blitV(x, y, height, leftAlpha); + blitV(x + 1 + width, y, height, rightAlpha); + blitRect(x + 1, y, width, height); +} + +class RunBasedAdditiveBlitter : public AdditiveBlitter { +public: + RunBasedAdditiveBlitter(SkBlitter* realBlitter, + const SkIRect& ir, + const SkIRect& clipBounds, + bool isInverse); + + ~RunBasedAdditiveBlitter() override { this->flush(); } + + SkBlitter* getRealBlitter(bool forceRealBlitter) override { return fRealBlitter; } + + void blitAntiH(int x, int y, const SkAlpha antialias[], int len) override; + void blitAntiH(int x, int y, const SkAlpha alpha) override; + void blitAntiH(int x, int y, int width, const SkAlpha alpha) override; + + int getWidth() override { return fWidth; } + + void flush_if_y_changed(SkFixed y, SkFixed nextY) override { + if (SkFixedFloorToInt(y) != SkFixedFloorToInt(nextY)) { + this->flush(); + } + } + +protected: + SkBlitter* fRealBlitter; + + int fCurrY; // Current y coordinate. + int fWidth; // Widest row of region to be blitted + int fLeft; // Leftmost x coordinate in any row + int fTop; // Initial y coordinate (top of bounds) + + // The next three variables are used to track a circular buffer that + // contains the values used in SkAlphaRuns. These variables should only + // ever be updated in advanceRuns(), and fRuns should always point to + // a valid SkAlphaRuns... + int fRunsToBuffer; + void* fRunsBuffer; + int fCurrentRun; + SkAlphaRuns fRuns; + + int fOffsetX; + + bool check(int x, int width) const { return x >= 0 && x + width <= fWidth; } + + // extra one to store the zero at the end + int getRunsSz() const { return (fWidth + 1 + (fWidth + 2) / 2) * sizeof(int16_t); } + + // This function updates the fRuns variable to point to the next buffer space + // with adequate storage for a SkAlphaRuns. It mostly just advances fCurrentRun + // and resets fRuns to point to an empty scanline. + void advanceRuns() { + const size_t kRunsSz = this->getRunsSz(); + fCurrentRun = (fCurrentRun + 1) % fRunsToBuffer; + fRuns.fRuns = reinterpret_cast(reinterpret_cast(fRunsBuffer) + + fCurrentRun * kRunsSz); + fRuns.fAlpha = reinterpret_cast(fRuns.fRuns + fWidth + 1); + fRuns.reset(fWidth); + } + + // Blitting 0xFF and 0 is much faster so we snap alphas close to them + SkAlpha snapAlpha(SkAlpha alpha) { return alpha > 247 ? 0xFF : alpha < 8 ? 0x00 : alpha; } + + void flush() { + if (fCurrY >= fTop) { + SkASSERT(fCurrentRun < fRunsToBuffer); + for (int x = 0; fRuns.fRuns[x]; x += fRuns.fRuns[x]) { + // It seems that blitting 255 or 0 is much faster than blitting 254 or 1 + fRuns.fAlpha[x] = snapAlpha(fRuns.fAlpha[x]); + } + if (!fRuns.empty()) { + // SkDEBUGCODE(fRuns.dump();) + fRealBlitter->blitAntiH(fLeft, fCurrY, fRuns.fAlpha, fRuns.fRuns); + this->advanceRuns(); + fOffsetX = 0; + } + fCurrY = fTop - 1; + } + } + + void checkY(int y) { + if (y != fCurrY) { + this->flush(); + fCurrY = y; + } + } +}; + +RunBasedAdditiveBlitter::RunBasedAdditiveBlitter(SkBlitter* realBlitter, + const SkIRect& ir, + const SkIRect& clipBounds, + bool isInverse) { + fRealBlitter = realBlitter; + + SkIRect sectBounds; + if (isInverse) { + // We use the clip bounds instead of the ir, since we may be asked to + // draw outside of the rect when we're a inverse filltype + sectBounds = clipBounds; + } else { + if (!sectBounds.intersect(ir, clipBounds)) { + sectBounds.setEmpty(); + } + } + + const int left = sectBounds.left(); + const int right = sectBounds.right(); + + fLeft = left; + fWidth = right - left; + fTop = sectBounds.top(); + fCurrY = fTop - 1; + + fRunsToBuffer = realBlitter->requestRowsPreserved(); + fRunsBuffer = realBlitter->allocBlitMemory(fRunsToBuffer * this->getRunsSz()); + fCurrentRun = -1; + + this->advanceRuns(); + + fOffsetX = 0; +} + +void RunBasedAdditiveBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], int len) { + checkY(y); + x -= fLeft; + + if (x < 0) { + len += x; + antialias -= x; + x = 0; + } + len = std::min(len, fWidth - x); + SkASSERT(check(x, len)); + + if (x < fOffsetX) { + fOffsetX = 0; + } + + fOffsetX = fRuns.add(x, 0, len, 0, 0, fOffsetX); // Break the run + for (int i = 0; i < len; i += fRuns.fRuns[x + i]) { + for (int j = 1; j < fRuns.fRuns[x + i]; j++) { + fRuns.fRuns[x + i + j] = 1; + fRuns.fAlpha[x + i + j] = fRuns.fAlpha[x + i]; + } + fRuns.fRuns[x + i] = 1; + } + for (int i = 0; i < len; ++i) { + add_alpha(&fRuns.fAlpha[x + i], antialias[i]); + } +} + +void RunBasedAdditiveBlitter::blitAntiH(int x, int y, const SkAlpha alpha) { + checkY(y); + x -= fLeft; + + if (x < fOffsetX) { + fOffsetX = 0; + } + + if (this->check(x, 1)) { + fOffsetX = fRuns.add(x, 0, 1, 0, alpha, fOffsetX); + } +} + +void RunBasedAdditiveBlitter::blitAntiH(int x, int y, int width, const SkAlpha alpha) { + checkY(y); + x -= fLeft; + + if (x < fOffsetX) { + fOffsetX = 0; + } + + if (this->check(x, width)) { + fOffsetX = fRuns.add(x, 0, width, 0, alpha, fOffsetX); + } +} + +// This exists specifically for concave path filling. +// In those cases, we can easily accumulate alpha greater than 0xFF. +class SafeRLEAdditiveBlitter : public RunBasedAdditiveBlitter { +public: + SafeRLEAdditiveBlitter(SkBlitter* realBlitter, + const SkIRect& ir, + const SkIRect& clipBounds, + bool isInverse) + : RunBasedAdditiveBlitter(realBlitter, ir, clipBounds, isInverse) {} + + void blitAntiH(int x, int y, const SkAlpha antialias[], int len) override; + void blitAntiH(int x, int y, const SkAlpha alpha) override; + void blitAntiH(int x, int y, int width, const SkAlpha alpha) override; +}; + +void SafeRLEAdditiveBlitter::blitAntiH(int x, int y, const SkAlpha antialias[], int len) { + checkY(y); + x -= fLeft; + + if (x < 0) { + len += x; + antialias -= x; + x = 0; + } + len = std::min(len, fWidth - x); + SkASSERT(check(x, len)); + + if (x < fOffsetX) { + fOffsetX = 0; + } + + fOffsetX = fRuns.add(x, 0, len, 0, 0, fOffsetX); // Break the run + for (int i = 0; i < len; i += fRuns.fRuns[x + i]) { + for (int j = 1; j < fRuns.fRuns[x + i]; j++) { + fRuns.fRuns[x + i + j] = 1; + fRuns.fAlpha[x + i + j] = fRuns.fAlpha[x + i]; + } + fRuns.fRuns[x + i] = 1; + } + for (int i = 0; i < len; ++i) { + safely_add_alpha(&fRuns.fAlpha[x + i], antialias[i]); + } +} + +void SafeRLEAdditiveBlitter::blitAntiH(int x, int y, const SkAlpha alpha) { + checkY(y); + x -= fLeft; + + if (x < fOffsetX) { + fOffsetX = 0; + } + + if (check(x, 1)) { + // Break the run + fOffsetX = fRuns.add(x, 0, 1, 0, 0, fOffsetX); + safely_add_alpha(&fRuns.fAlpha[x], alpha); + } +} + +void SafeRLEAdditiveBlitter::blitAntiH(int x, int y, int width, const SkAlpha alpha) { + checkY(y); + x -= fLeft; + + if (x < fOffsetX) { + fOffsetX = 0; + } + + if (check(x, width)) { + // Break the run + fOffsetX = fRuns.add(x, 0, width, 0, 0, fOffsetX); + for (int i = x; i < x + width; i += fRuns.fRuns[i]) { + safely_add_alpha(&fRuns.fAlpha[i], alpha); + } + } +} + +// Return the alpha of a trapezoid whose height is 1 +static SkAlpha trapezoid_to_alpha(SkFixed l1, SkFixed l2) { + SkASSERT(l1 >= 0 && l2 >= 0); + SkFixed area = (l1 + l2) / 2; + return SkTo(area >> 8); +} + +// The alpha of right-triangle (a, a*b) +static SkAlpha partial_triangle_to_alpha(SkFixed a, SkFixed b) { + SkASSERT(a <= SK_Fixed1); +#if 0 + // TODO(mtklein): skia:8877 + SkASSERT(b <= SK_Fixed1); +#endif + + // Approximating... + // SkFixed area = SkFixedMul(a, SkFixedMul(a,b)) / 2; + SkFixed area = (a >> 11) * (a >> 11) * (b >> 11); + +#if 0 + // TODO(mtklein): skia:8877 + return SkTo(area >> 8); +#else + return SkTo((area >> 8) & 0xFF); +#endif +} + +static SkAlpha get_partial_alpha(SkAlpha alpha, SkFixed partialHeight) { + return SkToU8(SkFixedRoundToInt(alpha * partialHeight)); +} + +static SkAlpha get_partial_alpha(SkAlpha alpha, SkAlpha fullAlpha) { + return (alpha * fullAlpha) >> 8; +} + +// For SkFixed that's close to SK_Fixed1, we can't convert it to alpha by just shifting right. +// For example, when f = SK_Fixed1, right shifting 8 will get 256, but we need 255. +// This is rarely the problem so we'll only use this for blitting rectangles. +static SkAlpha fixed_to_alpha(SkFixed f) { + SkASSERT(f <= SK_Fixed1); + return get_partial_alpha(0xFF, f); +} + +// Suppose that line (l1, y)-(r1, y+1) intersects with (l2, y)-(r2, y+1), +// approximate (very coarsely) the x coordinate of the intersection. +static SkFixed approximate_intersection(SkFixed l1, SkFixed r1, SkFixed l2, SkFixed r2) { + if (l1 > r1) { + std::swap(l1, r1); + } + if (l2 > r2) { + std::swap(l2, r2); + } + return (std::max(l1, l2) + std::min(r1, r2)) / 2; +} + +// Here we always send in l < SK_Fixed1, and the first alpha we want to compute is alphas[0] +static void compute_alpha_above_line(SkAlpha* alphas, + SkFixed l, + SkFixed r, + SkFixed dY, + SkAlpha fullAlpha) { + SkASSERT(l <= r); + SkASSERT(l >> 16 == 0); + int R = SkFixedCeilToInt(r); + if (R == 0) { + return; + } else if (R == 1) { + alphas[0] = get_partial_alpha(((R << 17) - l - r) >> 9, fullAlpha); + } else { + SkFixed first = SK_Fixed1 - l; // horizontal edge length of the left-most triangle + SkFixed last = r - ((R - 1) << 16); // horizontal edge length of the right-most triangle + SkFixed firstH = SkFixedMul(first, dY); // vertical edge of the left-most triangle + alphas[0] = SkFixedMul(first, firstH) >> 9; // triangle alpha + SkFixed alpha16 = firstH + (dY >> 1); // rectangle plus triangle + for (int i = 1; i < R - 1; ++i) { + alphas[i] = alpha16 >> 8; + alpha16 += dY; + } + alphas[R - 1] = fullAlpha - partial_triangle_to_alpha(last, dY); + } +} + +// Here we always send in l < SK_Fixed1, and the first alpha we want to compute is alphas[0] +static void compute_alpha_below_line(SkAlpha* alphas, + SkFixed l, + SkFixed r, + SkFixed dY, + SkAlpha fullAlpha) { + SkASSERT(l <= r); + SkASSERT(l >> 16 == 0); + int R = SkFixedCeilToInt(r); + if (R == 0) { + return; + } else if (R == 1) { + alphas[0] = get_partial_alpha(trapezoid_to_alpha(l, r), fullAlpha); + } else { + SkFixed first = SK_Fixed1 - l; // horizontal edge length of the left-most triangle + SkFixed last = r - ((R - 1) << 16); // horizontal edge length of the right-most triangle + SkFixed lastH = SkFixedMul(last, dY); // vertical edge of the right-most triangle + alphas[R - 1] = SkFixedMul(last, lastH) >> 9; // triangle alpha + SkFixed alpha16 = lastH + (dY >> 1); // rectangle plus triangle + for (int i = R - 2; i > 0; i--) { + alphas[i] = (alpha16 >> 8) & 0xFF; + alpha16 += dY; + } + alphas[0] = fullAlpha - partial_triangle_to_alpha(first, dY); + } +} + +// Note that if fullAlpha != 0xFF, we'll multiply alpha by fullAlpha +static void blit_single_alpha(AdditiveBlitter* blitter, + int y, + int x, + SkAlpha alpha, + SkAlpha fullAlpha, + SkAlpha* maskRow, + bool isUsingMask, + bool noRealBlitter, + bool needSafeCheck) { + if (isUsingMask) { + if (fullAlpha == 0xFF && !noRealBlitter) { // noRealBlitter is needed for concave paths + maskRow[x] = alpha; + } else if (needSafeCheck) { + safely_add_alpha(&maskRow[x], get_partial_alpha(alpha, fullAlpha)); + } else { + add_alpha(&maskRow[x], get_partial_alpha(alpha, fullAlpha)); + } + } else { + if (fullAlpha == 0xFF && !noRealBlitter) { + blitter->getRealBlitter()->blitV(x, y, 1, alpha); + } else { + blitter->blitAntiH(x, y, get_partial_alpha(alpha, fullAlpha)); + } + } +} + +static void blit_two_alphas(AdditiveBlitter* blitter, + int y, + int x, + SkAlpha a1, + SkAlpha a2, + SkAlpha fullAlpha, + SkAlpha* maskRow, + bool isUsingMask, + bool noRealBlitter, + bool needSafeCheck) { + if (isUsingMask) { + if (needSafeCheck) { + safely_add_alpha(&maskRow[x], a1); + safely_add_alpha(&maskRow[x + 1], a2); + } else { + add_alpha(&maskRow[x], a1); + add_alpha(&maskRow[x + 1], a2); + } + } else { + if (fullAlpha == 0xFF && !noRealBlitter) { + blitter->getRealBlitter()->blitAntiH2(x, y, a1, a2); + } else { + blitter->blitAntiH(x, y, a1); + blitter->blitAntiH(x + 1, y, a2); + } + } +} + +static void blit_full_alpha(AdditiveBlitter* blitter, + int y, + int x, + int len, + SkAlpha fullAlpha, + SkAlpha* maskRow, + bool isUsingMask, + bool noRealBlitter, + bool needSafeCheck) { + if (isUsingMask) { + for (int i = 0; i < len; ++i) { + if (needSafeCheck) { + safely_add_alpha(&maskRow[x + i], fullAlpha); + } else { + add_alpha(&maskRow[x + i], fullAlpha); + } + } + } else { + if (fullAlpha == 0xFF && !noRealBlitter) { + blitter->getRealBlitter()->blitH(x, y, len); + } else { + blitter->blitAntiH(x, y, len, fullAlpha); + } + } +} + +static void blit_aaa_trapezoid_row(AdditiveBlitter* blitter, + int y, + SkFixed ul, + SkFixed ur, + SkFixed ll, + SkFixed lr, + SkFixed lDY, + SkFixed rDY, + SkAlpha fullAlpha, + SkAlpha* maskRow, + bool isUsingMask, + bool noRealBlitter, + bool needSafeCheck) { + int L = SkFixedFloorToInt(ul), R = SkFixedCeilToInt(lr); + int len = R - L; + + if (len == 1) { + SkAlpha alpha = trapezoid_to_alpha(ur - ul, lr - ll); + blit_single_alpha(blitter, + y, + L, + alpha, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + return; + } + + const int kQuickLen = 31; + char quickMemory[(sizeof(SkAlpha) * 2 + sizeof(int16_t)) * (kQuickLen + 1)]; + SkAlpha* alphas; + + if (len <= kQuickLen) { + alphas = (SkAlpha*)quickMemory; + } else { + alphas = new SkAlpha[(len + 1) * (sizeof(SkAlpha) * 2 + sizeof(int16_t))]; + } + + SkAlpha* tempAlphas = alphas + len + 1; + int16_t* runs = (int16_t*)(alphas + (len + 1) * 2); + + for (int i = 0; i < len; ++i) { + runs[i] = 1; + alphas[i] = fullAlpha; + } + runs[len] = 0; + + int uL = SkFixedFloorToInt(ul); + int lL = SkFixedCeilToInt(ll); + if (uL + 2 == lL) { // We only need to compute two triangles, accelerate this special case + SkFixed first = SkIntToFixed(uL) + SK_Fixed1 - ul; + SkFixed second = ll - ul - first; + SkAlpha a1 = fullAlpha - partial_triangle_to_alpha(first, lDY); + SkAlpha a2 = partial_triangle_to_alpha(second, lDY); + alphas[0] = alphas[0] > a1 ? alphas[0] - a1 : 0; + alphas[1] = alphas[1] > a2 ? alphas[1] - a2 : 0; + } else { + compute_alpha_below_line( + tempAlphas + uL - L, ul - SkIntToFixed(uL), ll - SkIntToFixed(uL), lDY, fullAlpha); + for (int i = uL; i < lL; ++i) { + if (alphas[i - L] > tempAlphas[i - L]) { + alphas[i - L] -= tempAlphas[i - L]; + } else { + alphas[i - L] = 0; + } + } + } + + int uR = SkFixedFloorToInt(ur); + int lR = SkFixedCeilToInt(lr); + if (uR + 2 == lR) { // We only need to compute two triangles, accelerate this special case + SkFixed first = SkIntToFixed(uR) + SK_Fixed1 - ur; + SkFixed second = lr - ur - first; + SkAlpha a1 = partial_triangle_to_alpha(first, rDY); + SkAlpha a2 = fullAlpha - partial_triangle_to_alpha(second, rDY); + alphas[len - 2] = alphas[len - 2] > a1 ? alphas[len - 2] - a1 : 0; + alphas[len - 1] = alphas[len - 1] > a2 ? alphas[len - 1] - a2 : 0; + } else { + compute_alpha_above_line( + tempAlphas + uR - L, ur - SkIntToFixed(uR), lr - SkIntToFixed(uR), rDY, fullAlpha); + for (int i = uR; i < lR; ++i) { + if (alphas[i - L] > tempAlphas[i - L]) { + alphas[i - L] -= tempAlphas[i - L]; + } else { + alphas[i - L] = 0; + } + } + } + + if (isUsingMask) { + for (int i = 0; i < len; ++i) { + if (needSafeCheck) { + safely_add_alpha(&maskRow[L + i], alphas[i]); + } else { + add_alpha(&maskRow[L + i], alphas[i]); + } + } + } else { + if (fullAlpha == 0xFF && !noRealBlitter) { + // Real blitter is faster than RunBasedAdditiveBlitter + blitter->getRealBlitter()->blitAntiH(L, y, alphas, runs); + } else { + blitter->blitAntiH(L, y, alphas, len); + } + } + + if (len > kQuickLen) { + delete[] alphas; + } +} + +static void blit_trapezoid_row(AdditiveBlitter* blitter, + int y, + SkFixed ul, + SkFixed ur, + SkFixed ll, + SkFixed lr, + SkFixed lDY, + SkFixed rDY, + SkAlpha fullAlpha, + SkAlpha* maskRow, + bool isUsingMask, + bool noRealBlitter = false, + bool needSafeCheck = false) { + SkASSERT(lDY >= 0 && rDY >= 0); // We should only send in the absolte value + + if (ul > ur) { + return; + } + + // Edge crosses. Approximate it. This should only happend due to precision limit, + // so the approximation could be very coarse. + if (ll > lr) { + ll = lr = approximate_intersection(ul, ll, ur, lr); + } + + if (ul == ur && ll == lr) { + return; // empty trapzoid + } + + // We're going to use the left line ul-ll and the rite line ur-lr + // to exclude the area that's not covered by the path. + // Swapping (ul, ll) or (ur, lr) won't affect that exclusion + // so we'll do that for simplicity. + if (ul > ll) { + std::swap(ul, ll); + } + if (ur > lr) { + std::swap(ur, lr); + } + + SkFixed joinLeft = SkFixedCeilToFixed(ll); + SkFixed joinRite = SkFixedFloorToFixed(ur); + if (joinLeft <= joinRite) { // There's a rect from joinLeft to joinRite that we can blit + if (ul < joinLeft) { + int len = SkFixedCeilToInt(joinLeft - ul); + if (len == 1) { + SkAlpha alpha = trapezoid_to_alpha(joinLeft - ul, joinLeft - ll); + blit_single_alpha(blitter, + y, + ul >> 16, + alpha, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } else if (len == 2) { + SkFixed first = joinLeft - SK_Fixed1 - ul; + SkFixed second = ll - ul - first; + SkAlpha a1 = partial_triangle_to_alpha(first, lDY); + SkAlpha a2 = fullAlpha - partial_triangle_to_alpha(second, lDY); + blit_two_alphas(blitter, + y, + ul >> 16, + a1, + a2, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } else { + blit_aaa_trapezoid_row(blitter, + y, + ul, + joinLeft, + ll, + joinLeft, + lDY, + SK_MaxS32, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } + } + // SkAAClip requires that we blit from left to right. + // Hence we must blit [ul, joinLeft] before blitting [joinLeft, joinRite] + if (joinLeft < joinRite) { + blit_full_alpha(blitter, + y, + SkFixedFloorToInt(joinLeft), + SkFixedFloorToInt(joinRite - joinLeft), + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } + if (lr > joinRite) { + int len = SkFixedCeilToInt(lr - joinRite); + if (len == 1) { + SkAlpha alpha = trapezoid_to_alpha(ur - joinRite, lr - joinRite); + blit_single_alpha(blitter, + y, + joinRite >> 16, + alpha, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } else if (len == 2) { + SkFixed first = joinRite + SK_Fixed1 - ur; + SkFixed second = lr - ur - first; + SkAlpha a1 = fullAlpha - partial_triangle_to_alpha(first, rDY); + SkAlpha a2 = partial_triangle_to_alpha(second, rDY); + blit_two_alphas(blitter, + y, + joinRite >> 16, + a1, + a2, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } else { + blit_aaa_trapezoid_row(blitter, + y, + joinRite, + ur, + joinRite, + lr, + SK_MaxS32, + rDY, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } + } + } else { + blit_aaa_trapezoid_row(blitter, + y, + ul, + ur, + ll, + lr, + lDY, + rDY, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter, + needSafeCheck); + } +} + +static bool operator<(const SkAnalyticEdge& a, const SkAnalyticEdge& b) { + int valuea = a.fUpperY; + int valueb = b.fUpperY; + + if (valuea == valueb) { + valuea = a.fX; + valueb = b.fX; + } + + if (valuea == valueb) { + valuea = a.fDX; + valueb = b.fDX; + } + + return valuea < valueb; +} + +static SkAnalyticEdge* sort_edges(SkAnalyticEdge* list[], int count, SkAnalyticEdge** last) { + SkTQSort(list, list + count); + + // now make the edges linked in sorted order + for (int i = 1; i < count; ++i) { + list[i - 1]->fNext = list[i]; + list[i]->fPrev = list[i - 1]; + } + + *last = list[count - 1]; + return list[0]; +} + +static void validate_sort(const SkAnalyticEdge* edge) { +#ifdef SK_DEBUG + SkFixed y = SkIntToFixed(-32768); + + while (edge->fUpperY != SK_MaxS32) { + edge->validate(); + SkASSERT(y <= edge->fUpperY); + + y = edge->fUpperY; + edge = (SkAnalyticEdge*)edge->fNext; + } +#endif +} + +// For an edge, we consider it smooth if the Dx doesn't change much, and Dy is large enough +// For curves that are updating, the Dx is not changing much if fQDx/fCDx and fQDy/fCDy are +// relatively large compared to fQDDx/QCDDx and fQDDy/fCDDy +static bool is_smooth_enough(SkAnalyticEdge* thisEdge, SkAnalyticEdge* nextEdge, int stop_y) { + if (thisEdge->fCurveCount < 0) { + const SkCubicEdge& cEdge = static_cast(thisEdge)->fCEdge; + int ddshift = cEdge.fCurveShift; + return SkAbs32(cEdge.fCDx) >> 1 >= SkAbs32(cEdge.fCDDx) >> ddshift && + SkAbs32(cEdge.fCDy) >> 1 >= SkAbs32(cEdge.fCDDy) >> ddshift && + // current Dy is (fCDy - (fCDDy >> ddshift)) >> dshift + (cEdge.fCDy - (cEdge.fCDDy >> ddshift)) >> cEdge.fCubicDShift >= SK_Fixed1; + } else if (thisEdge->fCurveCount > 0) { + const SkQuadraticEdge& qEdge = static_cast(thisEdge)->fQEdge; + return SkAbs32(qEdge.fQDx) >> 1 >= SkAbs32(qEdge.fQDDx) && + SkAbs32(qEdge.fQDy) >> 1 >= SkAbs32(qEdge.fQDDy) && + // current Dy is (fQDy - fQDDy) >> shift + (qEdge.fQDy - qEdge.fQDDy) >> qEdge.fCurveShift >= SK_Fixed1; + } + return SkAbs32(nextEdge->fDX - thisEdge->fDX) <= SK_Fixed1 && // DDx should be small + nextEdge->fLowerY - nextEdge->fUpperY >= SK_Fixed1; // Dy should be large +} + +// Check if the leftE and riteE are changing smoothly in terms of fDX. +// If yes, we can later skip the fractional y and directly jump to integer y. +static bool is_smooth_enough(SkAnalyticEdge* leftE, + SkAnalyticEdge* riteE, + SkAnalyticEdge* currE, + int stop_y) { + if (currE->fUpperY >= SkLeftShift(stop_y, 16)) { + return false; // We're at the end so we won't skip anything + } + if (leftE->fLowerY + SK_Fixed1 < riteE->fLowerY) { + return is_smooth_enough(leftE, currE, stop_y); // Only leftE is changing + } else if (leftE->fLowerY > riteE->fLowerY + SK_Fixed1) { + return is_smooth_enough(riteE, currE, stop_y); // Only riteE is changing + } + + // Now both edges are changing, find the second next edge + SkAnalyticEdge* nextCurrE = currE->fNext; + if (nextCurrE->fUpperY >= stop_y << 16) { // Check if we're at the end + return false; + } + // Ensure that currE is the next left edge and nextCurrE is the next right edge. Swap if not. + if (nextCurrE->fUpperX < currE->fUpperX) { + std::swap(currE, nextCurrE); + } + return is_smooth_enough(leftE, currE, stop_y) && is_smooth_enough(riteE, nextCurrE, stop_y); +} + +static void aaa_walk_convex_edges(SkAnalyticEdge* prevHead, + AdditiveBlitter* blitter, + int start_y, + int stop_y, + SkFixed leftBound, + SkFixed riteBound, + bool isUsingMask) { + validate_sort((SkAnalyticEdge*)prevHead->fNext); + + SkAnalyticEdge* leftE = (SkAnalyticEdge*)prevHead->fNext; + SkAnalyticEdge* riteE = (SkAnalyticEdge*)leftE->fNext; + SkAnalyticEdge* currE = (SkAnalyticEdge*)riteE->fNext; + + SkFixed y = std::max(leftE->fUpperY, riteE->fUpperY); + + for (;;) { + // We have to check fLowerY first because some edges might be alone (e.g., there's only + // a left edge but no right edge in a given y scan line) due to precision limit. + while (leftE->fLowerY <= y) { // Due to smooth jump, we may pass multiple short edges + if (!leftE->update(y)) { + if (SkFixedFloorToInt(currE->fUpperY) >= stop_y) { + goto END_WALK; + } + leftE = currE; + currE = (SkAnalyticEdge*)currE->fNext; + } + } + while (riteE->fLowerY <= y) { // Due to smooth jump, we may pass multiple short edges + if (!riteE->update(y)) { + if (SkFixedFloorToInt(currE->fUpperY) >= stop_y) { + goto END_WALK; + } + riteE = currE; + currE = (SkAnalyticEdge*)currE->fNext; + } + } + + SkASSERT(leftE); + SkASSERT(riteE); + + // check our bottom clip + if (SkFixedFloorToInt(y) >= stop_y) { + break; + } + + SkASSERT(SkFixedFloorToInt(leftE->fUpperY) <= stop_y); + SkASSERT(SkFixedFloorToInt(riteE->fUpperY) <= stop_y); + + leftE->goY(y); + riteE->goY(y); + + if (leftE->fX > riteE->fX || (leftE->fX == riteE->fX && leftE->fDX > riteE->fDX)) { + std::swap(leftE, riteE); + } + + SkFixed local_bot_fixed = std::min(leftE->fLowerY, riteE->fLowerY); + if (is_smooth_enough(leftE, riteE, currE, stop_y)) { + local_bot_fixed = SkFixedCeilToFixed(local_bot_fixed); + } + local_bot_fixed = std::min(local_bot_fixed, SkIntToFixed(stop_y)); + + SkFixed left = std::max(leftBound, leftE->fX); + SkFixed dLeft = leftE->fDX; + SkFixed rite = std::min(riteBound, riteE->fX); + SkFixed dRite = riteE->fDX; + if (0 == (dLeft | dRite)) { + int fullLeft = SkFixedCeilToInt(left); + int fullRite = SkFixedFloorToInt(rite); + SkFixed partialLeft = SkIntToFixed(fullLeft) - left; + SkFixed partialRite = rite - SkIntToFixed(fullRite); + int fullTop = SkFixedCeilToInt(y); + int fullBot = SkFixedFloorToInt(local_bot_fixed); + SkFixed partialTop = SkIntToFixed(fullTop) - y; + SkFixed partialBot = local_bot_fixed - SkIntToFixed(fullBot); + if (fullTop > fullBot) { // The rectangle is within one pixel height... + partialTop -= (SK_Fixed1 - partialBot); + partialBot = 0; + } + + if (fullRite >= fullLeft) { + if (partialTop > 0) { // blit first partial row + if (partialLeft > 0) { + blitter->blitAntiH(fullLeft - 1, + fullTop - 1, + fixed_to_alpha(SkFixedMul(partialTop, partialLeft))); + } + blitter->blitAntiH( + fullLeft, fullTop - 1, fullRite - fullLeft, fixed_to_alpha(partialTop)); + if (partialRite > 0) { + blitter->blitAntiH(fullRite, + fullTop - 1, + fixed_to_alpha(SkFixedMul(partialTop, partialRite))); + } + blitter->flush_if_y_changed(y, y + partialTop); + } + + // Blit all full-height rows from fullTop to fullBot + if (fullBot > fullTop && + // SkAAClip cannot handle the empty rect so check the non-emptiness here + // (bug chromium:662800) + (fullRite > fullLeft || fixed_to_alpha(partialLeft) > 0 || + fixed_to_alpha(partialRite) > 0)) { + blitter->getRealBlitter()->blitAntiRect(fullLeft - 1, + fullTop, + fullRite - fullLeft, + fullBot - fullTop, + fixed_to_alpha(partialLeft), + fixed_to_alpha(partialRite)); + } + + if (partialBot > 0) { // blit last partial row + if (partialLeft > 0) { + blitter->blitAntiH(fullLeft - 1, + fullBot, + fixed_to_alpha(SkFixedMul(partialBot, partialLeft))); + } + blitter->blitAntiH( + fullLeft, fullBot, fullRite - fullLeft, fixed_to_alpha(partialBot)); + if (partialRite > 0) { + blitter->blitAntiH(fullRite, + fullBot, + fixed_to_alpha(SkFixedMul(partialBot, partialRite))); + } + } + } else { + // Normal conditions, this means left and rite are within the same pixel, but if + // both left and rite were < leftBounds or > rightBounds, both edges are clipped and + // we should not do any blitting (particularly since the negative width saturates to + // full alpha). + SkFixed width = rite - left; + if (width > 0) { + if (partialTop > 0) { + blitter->blitAntiH(fullLeft - 1, + fullTop - 1, + 1, + fixed_to_alpha(SkFixedMul(partialTop, width))); + blitter->flush_if_y_changed(y, y + partialTop); + } + if (fullBot > fullTop) { + blitter->getRealBlitter()->blitV( + fullLeft - 1, fullTop, fullBot - fullTop, fixed_to_alpha(width)); + } + if (partialBot > 0) { + blitter->blitAntiH(fullLeft - 1, + fullBot, + 1, + fixed_to_alpha(SkFixedMul(partialBot, width))); + } + } + } + + y = local_bot_fixed; + } else { + // The following constant are used to snap X + // We snap X mainly for speedup (no tiny triangle) and + // avoiding edge cases caused by precision errors + const SkFixed kSnapDigit = SK_Fixed1 >> 4; + const SkFixed kSnapHalf = kSnapDigit >> 1; + const SkFixed kSnapMask = (-1 ^ (kSnapDigit - 1)); + left += kSnapHalf; + rite += kSnapHalf; // For fast rounding + + // Number of blit_trapezoid_row calls we'll have + int count = SkFixedCeilToInt(local_bot_fixed) - SkFixedFloorToInt(y); + + // If we're using mask blitter, we advance the mask row in this function + // to save some "if" condition checks. + SkAlpha* maskRow = nullptr; + if (isUsingMask) { + maskRow = static_cast(blitter)->getRow(y >> 16); + } + + // Instead of writing one loop that handles both partial-row blit_trapezoid_row + // and full-row trapezoid_row together, we use the following 3-stage flow to + // handle partial-row blit and full-row blit separately. It will save us much time + // on changing y, left, and rite. + if (count > 1) { + if ((int)(y & 0xFFFF0000) != y) { // There's a partial-row on the top + count--; + SkFixed nextY = SkFixedCeilToFixed(y + 1); + SkFixed dY = nextY - y; + SkFixed nextLeft = left + SkFixedMul(dLeft, dY); + SkFixed nextRite = rite + SkFixedMul(dRite, dY); + SkASSERT((left & kSnapMask) >= leftBound && (rite & kSnapMask) <= riteBound && + (nextLeft & kSnapMask) >= leftBound && + (nextRite & kSnapMask) <= riteBound); + blit_trapezoid_row(blitter, + y >> 16, + left & kSnapMask, + rite & kSnapMask, + nextLeft & kSnapMask, + nextRite & kSnapMask, + leftE->fDY, + riteE->fDY, + get_partial_alpha(0xFF, dY), + maskRow, + isUsingMask); + blitter->flush_if_y_changed(y, nextY); + left = nextLeft; + rite = nextRite; + y = nextY; + } + + while (count > 1) { // Full rows in the middle + count--; + if (isUsingMask) { + maskRow = static_cast(blitter)->getRow(y >> 16); + } + SkFixed nextY = y + SK_Fixed1, nextLeft = left + dLeft, nextRite = rite + dRite; + SkASSERT((left & kSnapMask) >= leftBound && (rite & kSnapMask) <= riteBound && + (nextLeft & kSnapMask) >= leftBound && + (nextRite & kSnapMask) <= riteBound); + blit_trapezoid_row(blitter, + y >> 16, + left & kSnapMask, + rite & kSnapMask, + nextLeft & kSnapMask, + nextRite & kSnapMask, + leftE->fDY, + riteE->fDY, + 0xFF, + maskRow, + isUsingMask); + blitter->flush_if_y_changed(y, nextY); + left = nextLeft; + rite = nextRite; + y = nextY; + } + } + + if (isUsingMask) { + maskRow = static_cast(blitter)->getRow(y >> 16); + } + + SkFixed dY = local_bot_fixed - y; // partial-row on the bottom + SkASSERT(dY <= SK_Fixed1); + // Smooth jumping to integer y may make the last nextLeft/nextRite out of bound. + // Take them back into the bound here. + // Note that we substract kSnapHalf later so we have to add them to leftBound/riteBound + SkFixed nextLeft = std::max(left + SkFixedMul(dLeft, dY), leftBound + kSnapHalf); + SkFixed nextRite = std::min(rite + SkFixedMul(dRite, dY), riteBound + kSnapHalf); + SkASSERT((left & kSnapMask) >= leftBound && (rite & kSnapMask) <= riteBound && + (nextLeft & kSnapMask) >= leftBound && (nextRite & kSnapMask) <= riteBound); + blit_trapezoid_row(blitter, + y >> 16, + left & kSnapMask, + rite & kSnapMask, + nextLeft & kSnapMask, + nextRite & kSnapMask, + leftE->fDY, + riteE->fDY, + get_partial_alpha(0xFF, dY), + maskRow, + isUsingMask); + blitter->flush_if_y_changed(y, local_bot_fixed); + left = nextLeft; + rite = nextRite; + y = local_bot_fixed; + left -= kSnapHalf; + rite -= kSnapHalf; + } + + leftE->fX = left; + riteE->fX = rite; + leftE->fY = riteE->fY = y; + } + +END_WALK:; +} + +static void update_next_next_y(SkFixed y, SkFixed nextY, SkFixed* nextNextY) { + *nextNextY = y > nextY && y < *nextNextY ? y : *nextNextY; +} + +static void check_intersection(const SkAnalyticEdge* edge, SkFixed nextY, SkFixed* nextNextY) { + if (edge->fPrev->fPrev && edge->fPrev->fX + edge->fPrev->fDX > edge->fX + edge->fDX) { + *nextNextY = nextY + (SK_Fixed1 >> SkAnalyticEdge::kDefaultAccuracy); + } +} + +static void insert_new_edges(SkAnalyticEdge* newEdge, SkFixed y, SkFixed* nextNextY) { + if (newEdge->fUpperY > y) { + update_next_next_y(newEdge->fUpperY, y, nextNextY); + return; + } + SkAnalyticEdge* prev = newEdge->fPrev; + if (prev->fX <= newEdge->fX) { + while (newEdge->fUpperY <= y) { + check_intersection(newEdge, y, nextNextY); + update_next_next_y(newEdge->fLowerY, y, nextNextY); + newEdge = newEdge->fNext; + } + update_next_next_y(newEdge->fUpperY, y, nextNextY); + return; + } + // find first x pos to insert + SkAnalyticEdge* start = backward_insert_start(prev, newEdge->fX); + // insert the lot, fixing up the links as we go + do { + SkAnalyticEdge* next = newEdge->fNext; + do { + if (start->fNext == newEdge) { + goto nextEdge; + } + SkAnalyticEdge* after = start->fNext; + if (after->fX >= newEdge->fX) { + break; + } + SkASSERT(start != after); + start = after; + } while (true); + remove_edge(newEdge); + insert_edge_after(newEdge, start); + nextEdge: + check_intersection(newEdge, y, nextNextY); + update_next_next_y(newEdge->fLowerY, y, nextNextY); + start = newEdge; + newEdge = next; + } while (newEdge->fUpperY <= y); + update_next_next_y(newEdge->fUpperY, y, nextNextY); +} + +static void validate_edges_for_y(const SkAnalyticEdge* edge, SkFixed y) { +#ifdef SK_DEBUG + while (edge->fUpperY <= y) { + SkASSERT(edge->fPrev && edge->fNext); + SkASSERT(edge->fPrev->fNext == edge); + SkASSERT(edge->fNext->fPrev == edge); + SkASSERT(edge->fUpperY <= edge->fLowerY); + SkASSERT(edge->fPrev->fPrev == nullptr || edge->fPrev->fX <= edge->fX); + edge = edge->fNext; + } +#endif +} + +// Return true if prev->fX, next->fX are too close in the current pixel row. +static bool edges_too_close(SkAnalyticEdge* prev, SkAnalyticEdge* next, SkFixed lowerY) { + // When next->fDX == 0, prev->fX >= next->fX - SkAbs32(next->fDX) would be false + // even if prev->fX and next->fX are close and within one pixel (e.g., prev->fX == 0.1, + // next->fX == 0.9). Adding SLACK = 1 to the formula would guarantee it to be true if two + // edges prev and next are within one pixel. + constexpr SkFixed SLACK = SK_Fixed1; + + // Note that even if the following test failed, the edges might still be very close to each + // other at some point within the current pixel row because of prev->fDX and next->fDX. + // However, to handle that case, we have to sacrafice more performance. + // I think the current quality is good enough (mainly by looking at Nebraska-StateSeal.svg) + // so I'll ignore fDX for performance tradeoff. + return next && prev && next->fUpperY < lowerY && + prev->fX + SLACK >= next->fX - SkAbs32(next->fDX); + // The following is more accurate but also slower. + // return (prev && prev->fPrev && next && next->fNext != nullptr && next->fUpperY < lowerY && + // prev->fX + SkAbs32(prev->fDX) + SLACK >= next->fX - SkAbs32(next->fDX)); +} + +// This function exists for the case where the previous rite edge is removed because +// its fLowerY <= nextY +static bool edges_too_close(int prevRite, SkFixed ul, SkFixed ll) { + return prevRite > SkFixedFloorToInt(ul) || prevRite > SkFixedFloorToInt(ll); +} + +static void blit_saved_trapezoid(SkAnalyticEdge* leftE, + SkFixed lowerY, + SkFixed lowerLeft, + SkFixed lowerRite, + AdditiveBlitter* blitter, + SkAlpha* maskRow, + bool isUsingMask, + bool noRealBlitter, + SkFixed leftClip, + SkFixed rightClip) { + SkAnalyticEdge* riteE = leftE->fRiteE; + SkASSERT(riteE); + SkASSERT(riteE->fNext == nullptr || leftE->fSavedY == riteE->fSavedY); + SkASSERT(SkFixedFloorToInt(lowerY - 1) == SkFixedFloorToInt(leftE->fSavedY)); + int y = SkFixedFloorToInt(leftE->fSavedY); + // Instead of using fixed_to_alpha(lowerY - leftE->fSavedY), we use the following fullAlpha + // to elimiate cumulative error: if there are many fractional y scan lines within the + // same row, the former may accumulate the rounding error while the later won't. + SkAlpha fullAlpha = fixed_to_alpha(lowerY - SkIntToFixed(y)) - + fixed_to_alpha(leftE->fSavedY - SkIntToFixed(y)); + // We need fSavedDY because the (quad or cubic) edge might be updated + blit_trapezoid_row( + blitter, + y, + std::max(leftE->fSavedX, leftClip), + std::min(riteE->fSavedX, rightClip), + std::max(lowerLeft, leftClip), + std::min(lowerRite, rightClip), + leftE->fSavedDY, + riteE->fSavedDY, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter || (fullAlpha == 0xFF && (edges_too_close(leftE->fPrev, leftE, lowerY) || + edges_too_close(riteE, riteE->fNext, lowerY))), + true); + leftE->fRiteE = nullptr; +} + +static void deferred_blit(SkAnalyticEdge* leftE, + SkAnalyticEdge* riteE, + SkFixed left, + SkFixed leftDY, // don't save leftE->fX/fDY as they may have been updated + SkFixed y, + SkFixed nextY, + bool isIntegralNextY, + bool leftEnds, + bool riteEnds, + AdditiveBlitter* blitter, + SkAlpha* maskRow, + bool isUsingMask, + bool noRealBlitter, + SkFixed leftClip, + SkFixed rightClip, + int yShift) { + if (leftE->fRiteE && leftE->fRiteE != riteE) { + // leftE's right edge changed. Blit the saved trapezoid. + SkASSERT(leftE->fRiteE->fNext == nullptr || leftE->fRiteE->fY == y); + blit_saved_trapezoid(leftE, + y, + left, + leftE->fRiteE->fX, + blitter, + maskRow, + isUsingMask, + noRealBlitter, + leftClip, + rightClip); + } + if (!leftE->fRiteE) { + // Save and defer blitting the trapezoid + SkASSERT(riteE->fRiteE == nullptr); + SkASSERT(leftE->fPrev == nullptr || leftE->fY == nextY); + SkASSERT(riteE->fNext == nullptr || riteE->fY == y); + leftE->saveXY(left, y, leftDY); + riteE->saveXY(riteE->fX, y, riteE->fDY); + leftE->fRiteE = riteE; + } + SkASSERT(leftE->fPrev == nullptr || leftE->fY == nextY); + riteE->goY(nextY, yShift); + // Always blit when edges end or nextY is integral + if (isIntegralNextY || leftEnds || riteEnds) { + blit_saved_trapezoid(leftE, + nextY, + leftE->fX, + riteE->fX, + blitter, + maskRow, + isUsingMask, + noRealBlitter, + leftClip, + rightClip); + } +} + +static void aaa_walk_edges(SkAnalyticEdge* prevHead, + SkAnalyticEdge* nextTail, + SkPathFillType fillType, + AdditiveBlitter* blitter, + int start_y, + int stop_y, + SkFixed leftClip, + SkFixed rightClip, + bool isUsingMask, + bool forceRLE, + bool useDeferred, + bool skipIntersect) { + prevHead->fX = prevHead->fUpperX = leftClip; + nextTail->fX = nextTail->fUpperX = rightClip; + SkFixed y = std::max(prevHead->fNext->fUpperY, SkIntToFixed(start_y)); + SkFixed nextNextY = SK_MaxS32; + + { + SkAnalyticEdge* edge; + for (edge = prevHead->fNext; edge->fUpperY <= y; edge = edge->fNext) { + edge->goY(y); + update_next_next_y(edge->fLowerY, y, &nextNextY); + } + update_next_next_y(edge->fUpperY, y, &nextNextY); + } + + int windingMask = SkPathFillType_IsEvenOdd(fillType) ? 1 : -1; + bool isInverse = SkPathFillType_IsInverse(fillType); + + if (isInverse && SkIntToFixed(start_y) != y) { + int width = SkFixedFloorToInt(rightClip - leftClip); + if (SkFixedFloorToInt(y) != start_y) { + blitter->getRealBlitter()->blitRect( + SkFixedFloorToInt(leftClip), start_y, width, SkFixedFloorToInt(y) - start_y); + start_y = SkFixedFloorToInt(y); + } + SkAlpha* maskRow = + isUsingMask ? static_cast(blitter)->getRow(start_y) : nullptr; + blit_full_alpha(blitter, + start_y, + SkFixedFloorToInt(leftClip), + width, + fixed_to_alpha(y - SkIntToFixed(start_y)), + maskRow, + isUsingMask, + false, + false); + } + + while (true) { + int w = 0; + bool in_interval = isInverse; + SkFixed prevX = prevHead->fX; + SkFixed nextY = std::min(nextNextY, SkFixedCeilToFixed(y + 1)); + bool isIntegralNextY = (nextY & (SK_Fixed1 - 1)) == 0; + SkAnalyticEdge* currE = prevHead->fNext; + SkAnalyticEdge* leftE = prevHead; + SkFixed left = leftClip; + SkFixed leftDY = 0; + bool leftEnds = false; + int prevRite = SkFixedFloorToInt(leftClip); + + nextNextY = SK_MaxS32; + + SkASSERT((nextY & ((SK_Fixed1 >> 2) - 1)) == 0); + int yShift = 0; + if ((nextY - y) & (SK_Fixed1 >> 2)) { + yShift = 2; + nextY = y + (SK_Fixed1 >> 2); + } else if ((nextY - y) & (SK_Fixed1 >> 1)) { + yShift = 1; + SkASSERT(nextY == y + (SK_Fixed1 >> 1)); + } + + SkAlpha fullAlpha = fixed_to_alpha(nextY - y); + + // If we're using mask blitter, we advance the mask row in this function + // to save some "if" condition checks. + SkAlpha* maskRow = nullptr; + if (isUsingMask) { + maskRow = static_cast(blitter)->getRow(SkFixedFloorToInt(y)); + } + + SkASSERT(currE->fPrev == prevHead); + validate_edges_for_y(currE, y); + + // Even if next - y == SK_Fixed1, we can still break the left-to-right order requirement + // of the SKAAClip: |\| (two trapezoids with overlapping middle wedges) + bool noRealBlitter = forceRLE; // forceRLE && (nextY - y != SK_Fixed1); + + while (currE->fUpperY <= y) { + SkASSERT(currE->fLowerY >= nextY); + SkASSERT(currE->fY == y); + + w += currE->fWinding; + bool prev_in_interval = in_interval; + in_interval = !(w & windingMask) == isInverse; + + bool isLeft = in_interval && !prev_in_interval; + bool isRite = !in_interval && prev_in_interval; + bool currEnds = currE->fLowerY == nextY; + + if (useDeferred) { + if (currE->fRiteE && !isLeft) { + // currE is a left edge previously, but now it's not. + // Blit the trapezoid between fSavedY and y. + SkASSERT(currE->fRiteE->fY == y); + blit_saved_trapezoid(currE, + y, + currE->fX, + currE->fRiteE->fX, + blitter, + maskRow, + isUsingMask, + noRealBlitter, + leftClip, + rightClip); + } + if (leftE->fRiteE == currE && !isRite) { + // currE is a right edge previously, but now it's not. + // Moreover, its corresponding leftE doesn't change (otherwise we'll handle it + // in the previous if clause). Hence we blit the trapezoid. + blit_saved_trapezoid(leftE, + y, + left, + currE->fX, + blitter, + maskRow, + isUsingMask, + noRealBlitter, + leftClip, + rightClip); + } + } + + if (isRite) { + if (useDeferred) { + deferred_blit(leftE, + currE, + left, + leftDY, + y, + nextY, + isIntegralNextY, + leftEnds, + currEnds, + blitter, + maskRow, + isUsingMask, + noRealBlitter, + leftClip, + rightClip, + yShift); + } else { + SkFixed rite = currE->fX; + currE->goY(nextY, yShift); + SkFixed nextLeft = std::max(leftClip, leftE->fX); + rite = std::min(rightClip, rite); + SkFixed nextRite = std::min(rightClip, currE->fX); + blit_trapezoid_row( + blitter, + y >> 16, + left, + rite, + nextLeft, + nextRite, + leftDY, + currE->fDY, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter || (fullAlpha == 0xFF && + (edges_too_close(prevRite, left, leftE->fX) || + edges_too_close(currE, currE->fNext, nextY))), + true); + prevRite = SkFixedCeilToInt(std::max(rite, currE->fX)); + } + } else { + if (isLeft) { + left = std::max(currE->fX, leftClip); + leftDY = currE->fDY; + leftE = currE; + leftEnds = leftE->fLowerY == nextY; + } + currE->goY(nextY, yShift); + } + + SkAnalyticEdge* next = currE->fNext; + SkFixed newX; + + while (currE->fLowerY <= nextY) { + if (currE->fCurveCount < 0) { + SkAnalyticCubicEdge* cubicEdge = (SkAnalyticCubicEdge*)currE; + cubicEdge->keepContinuous(); + if (!cubicEdge->updateCubic()) { + break; + } + } else if (currE->fCurveCount > 0) { + SkAnalyticQuadraticEdge* quadEdge = (SkAnalyticQuadraticEdge*)currE; + quadEdge->keepContinuous(); + if (!quadEdge->updateQuadratic()) { + break; + } + } else { + break; + } + } + SkASSERT(currE->fY == nextY); + + if (currE->fLowerY <= nextY) { + remove_edge(currE); + } else { + update_next_next_y(currE->fLowerY, nextY, &nextNextY); + newX = currE->fX; + SkASSERT(currE->fLowerY > nextY); + if (newX < prevX) { // ripple currE backwards until it is x-sorted + // If the crossing edge is a right edge, blit the saved trapezoid. + if (leftE->fRiteE == currE && useDeferred) { + SkASSERT(leftE->fY == nextY && currE->fY == nextY); + blit_saved_trapezoid(leftE, + nextY, + leftE->fX, + currE->fX, + blitter, + maskRow, + isUsingMask, + noRealBlitter, + leftClip, + rightClip); + } + backward_insert_edge_based_on_x(currE); + } else { + prevX = newX; + } + if (!skipIntersect) { + check_intersection(currE, nextY, &nextNextY); + } + } + + currE = next; + SkASSERT(currE); + } + + // was our right-edge culled away? + if (in_interval) { + if (useDeferred) { + deferred_blit(leftE, + nextTail, + left, + leftDY, + y, + nextY, + isIntegralNextY, + leftEnds, + false, + blitter, + maskRow, + isUsingMask, + noRealBlitter, + leftClip, + rightClip, + yShift); + } else { + blit_trapezoid_row(blitter, + y >> 16, + left, + rightClip, + std::max(leftClip, leftE->fX), + rightClip, + leftDY, + 0, + fullAlpha, + maskRow, + isUsingMask, + noRealBlitter || (fullAlpha == 0xFF && + edges_too_close(leftE->fPrev, leftE, nextY)), + true); + } + } + + if (forceRLE) { + ((RunBasedAdditiveBlitter*)blitter)->flush_if_y_changed(y, nextY); + } + + y = nextY; + if (y >= SkIntToFixed(stop_y)) { + break; + } + + // now currE points to the first edge with a fUpperY larger than the previous y + insert_new_edges(currE, y, &nextNextY); + } +} + +static void aaa_fill_path(const SkPath& path, + const SkIRect& clipRect, + AdditiveBlitter* blitter, + int start_y, + int stop_y, + bool pathContainedInClip, + bool isUsingMask, + bool forceRLE) { // forceRLE implies that SkAAClip is calling us + SkASSERT(blitter); + + SkAnalyticEdgeBuilder builder; + int count = builder.buildEdges(path, pathContainedInClip ? nullptr : &clipRect); + SkAnalyticEdge** list = builder.analyticEdgeList(); + + SkIRect rect = clipRect; + if (0 == count) { + if (path.isInverseFillType()) { + /* + * Since we are in inverse-fill, our caller has already drawn above + * our top (start_y) and will draw below our bottom (stop_y). Thus + * we need to restrict our drawing to the intersection of the clip + * and those two limits. + */ + if (rect.fTop < start_y) { + rect.fTop = start_y; + } + if (rect.fBottom > stop_y) { + rect.fBottom = stop_y; + } + if (!rect.isEmpty()) { + blitter->getRealBlitter()->blitRect( + rect.fLeft, rect.fTop, rect.width(), rect.height()); + } + } + return; + } + + SkAnalyticEdge headEdge, tailEdge, *last; + // this returns the first and last edge after they're sorted into a dlink list + SkAnalyticEdge* edge = sort_edges(list, count, &last); + + headEdge.fRiteE = nullptr; + headEdge.fPrev = nullptr; + headEdge.fNext = edge; + headEdge.fUpperY = headEdge.fLowerY = SK_MinS32; + headEdge.fX = SK_MinS32; + headEdge.fDX = 0; + headEdge.fDY = SK_MaxS32; + headEdge.fUpperX = SK_MinS32; + edge->fPrev = &headEdge; + + tailEdge.fRiteE = nullptr; + tailEdge.fPrev = last; + tailEdge.fNext = nullptr; + tailEdge.fUpperY = tailEdge.fLowerY = SK_MaxS32; + tailEdge.fX = SK_MaxS32; + tailEdge.fDX = 0; + tailEdge.fDY = SK_MaxS32; + tailEdge.fUpperX = SK_MaxS32; + last->fNext = &tailEdge; + + // now edge is the head of the sorted linklist + + if (!pathContainedInClip && start_y < clipRect.fTop) { + start_y = clipRect.fTop; + } + if (!pathContainedInClip && stop_y > clipRect.fBottom) { + stop_y = clipRect.fBottom; + } + + SkFixed leftBound = SkIntToFixed(rect.fLeft); + SkFixed rightBound = SkIntToFixed(rect.fRight); + if (isUsingMask) { + // If we're using mask, then we have to limit the bound within the path bounds. + // Otherwise, the edge drift may access an invalid address inside the mask. + SkIRect ir; + path.getBounds().roundOut(&ir); + leftBound = std::max(leftBound, SkIntToFixed(ir.fLeft)); + rightBound = std::min(rightBound, SkIntToFixed(ir.fRight)); + } + + if (!path.isInverseFillType() && path.isConvex() && count >= 2) { + aaa_walk_convex_edges( + &headEdge, blitter, start_y, stop_y, leftBound, rightBound, isUsingMask); + } else { + // Only use deferred blitting if there are many edges. + bool useDeferred = + count > + (SkFixedFloorToInt(tailEdge.fPrev->fLowerY - headEdge.fNext->fUpperY) + 1) * 4; + + // We skip intersection computation if there are many points which probably already + // give us enough fractional scan lines. + bool skipIntersect = path.countPoints() > (stop_y - start_y) * 2; + + aaa_walk_edges(&headEdge, + &tailEdge, + path.getFillType(), + blitter, + start_y, + stop_y, + leftBound, + rightBound, + isUsingMask, + forceRLE, + useDeferred, + skipIntersect); + } +} + +// Check if the path is a rect and fat enough after clipping; if so, blit it. +static inline bool try_blit_fat_anti_rect(SkBlitter* blitter, + const SkPath& path, + const SkIRect& clip) { + SkRect rect; + if (!path.isRect(&rect)) { + return false; // not rect + } + if (!rect.intersect(SkRect::Make(clip))) { + return true; // The intersection is empty. Hence consider it done. + } + SkIRect bounds = rect.roundOut(); + if (bounds.width() < 3) { + return false; // not fat + } + blitter->blitFatAntiRect(rect); + return true; +} + +void SkScan::AAAFillPath(const SkPath& path, + SkBlitter* blitter, + const SkIRect& ir, + const SkIRect& clipBounds, + bool forceRLE) { + bool containedInClip = clipBounds.contains(ir); + bool isInverse = path.isInverseFillType(); + + // The mask blitter (where we store intermediate alpha values directly in a mask, and then call + // the real blitter once in the end to blit the whole mask) is faster than the RLE blitter when + // the blit region is small enough (i.e., CanHandleRect(ir)). When isInverse is true, the blit + // region is no longer the rectangle ir so we won't use the mask blitter. The caller may also + // use the forceRLE flag to force not using the mask blitter. Also, when the path is a simple + // rect, preparing a mask and blitting it might have too much overhead. Hence we'll use + // blitFatAntiRect to avoid the mask and its overhead. + if (MaskAdditiveBlitter::CanHandleRect(ir) && !isInverse && !forceRLE) { + // blitFatAntiRect is slower than the normal AAA flow without MaskAdditiveBlitter. + // Hence only tryBlitFatAntiRect when MaskAdditiveBlitter would have been used. + if (!try_blit_fat_anti_rect(blitter, path, clipBounds)) { + MaskAdditiveBlitter additiveBlitter(blitter, ir, clipBounds, isInverse); + aaa_fill_path(path, + clipBounds, + &additiveBlitter, + ir.fTop, + ir.fBottom, + containedInClip, + true, + forceRLE); + } + } else if (!isInverse && path.isConvex()) { + // If the filling area is convex (i.e., path.isConvex && !isInverse), our simpler + // aaa_walk_convex_edges won't generate alphas above 255. Hence we don't need + // SafeRLEAdditiveBlitter (which is slow due to clamping). The basic RLE blitter + // RunBasedAdditiveBlitter would suffice. + RunBasedAdditiveBlitter additiveBlitter(blitter, ir, clipBounds, isInverse); + aaa_fill_path(path, + clipBounds, + &additiveBlitter, + ir.fTop, + ir.fBottom, + containedInClip, + false, + forceRLE); + } else { + // If the filling area might not be convex, the more involved aaa_walk_edges would + // be called and we have to clamp the alpha downto 255. The SafeRLEAdditiveBlitter + // does that at a cost of performance. + SafeRLEAdditiveBlitter additiveBlitter(blitter, ir, clipBounds, isInverse); + aaa_fill_path(path, + clipBounds, + &additiveBlitter, + ir.fTop, + ir.fBottom, + containedInClip, + false, + forceRLE); + } +} +#endif // defined(SK_DISABLE_AAA) diff --git a/gfx/skia/skia/src/core/SkScan_AntiPath.cpp b/gfx/skia/skia/src/core/SkScan_AntiPath.cpp new file mode 100644 index 0000000000..4ccc82ac30 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan_AntiPath.cpp @@ -0,0 +1,208 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkScanPriv.h" + +#include "include/core/SkGraphics.h" +#include "include/core/SkPath.h" +#include "include/core/SkRegion.h" +#include "src/core/SkBlitter.h" + +static SkIRect safeRoundOut(const SkRect& src) { + // roundOut will pin huge floats to max/min int + SkIRect dst = src.roundOut(); + + // intersect with a smaller huge rect, so the rect will not be considered empty for being + // too large. e.g. { -SK_MaxS32 ... SK_MaxS32 } is considered empty because its width + // exceeds signed 32bit. + const int32_t limit = SK_MaxS32 >> SK_SUPERSAMPLE_SHIFT; + (void)dst.intersect({ -limit, -limit, limit, limit}); + + return dst; +} + +SkGraphics::PathAnalyticAADeciderProc gAnalyticAADeciderProc = nullptr; + +void SkGraphics::SetPathAnalyticAADecider(SkGraphics::PathAnalyticAADeciderProc decider) { + gAnalyticAADeciderProc = decider; +} + +static bool ShouldUseAAA(const SkPath& path) { +#if defined(SK_DISABLE_AAA) + return false; +#elif defined(SK_FORCE_AAA) + return true; +#else + if (gAnalyticAADeciderProc) { + return gAnalyticAADeciderProc(path); + } + + if (gSkForceAnalyticAA) { + return true; + } + if (!gSkUseAnalyticAA) { + return false; + } + if (path.isRect(nullptr)) { + return true; + } + + const SkRect& bounds = path.getBounds(); + // When the path have so many points compared to the size of its + // bounds/resolution, it indicates that the path is not quite smooth in + // the current resolution: the expected number of turning points in + // every pixel row/column is significantly greater than zero. Hence + // Aanlytic AA is not likely to produce visible quality improvements, + // and Analytic AA might be slower than supersampling. + return path.countPoints() < std::max(bounds.width(), bounds.height()) / 2 - 10; +#endif +} + +static int overflows_short_shift(int value, int shift) { + const int s = 16 + shift; + return (SkLeftShift(value, s) >> s) - value; +} + +/** + Would any of the coordinates of this rectangle not fit in a short, + when left-shifted by shift? +*/ +static int rect_overflows_short_shift(SkIRect rect, int shift) { + SkASSERT(!overflows_short_shift(8191, shift)); + SkASSERT(overflows_short_shift(8192, shift)); + SkASSERT(!overflows_short_shift(32767, 0)); + SkASSERT(overflows_short_shift(32768, 0)); + + // Since we expect these to succeed, we bit-or together + // for a tiny extra bit of speed. + return overflows_short_shift(rect.fLeft, shift) | + overflows_short_shift(rect.fRight, shift) | + overflows_short_shift(rect.fTop, shift) | + overflows_short_shift(rect.fBottom, shift); +} + +void SkScan::AntiFillPath(const SkPath& path, const SkRegion& origClip, + SkBlitter* blitter, bool forceRLE) { + if (origClip.isEmpty()) { + return; + } + + const bool isInverse = path.isInverseFillType(); + SkIRect ir = safeRoundOut(path.getBounds()); + if (ir.isEmpty()) { + if (isInverse) { + blitter->blitRegion(origClip); + } + return; + } + + // If the intersection of the path bounds and the clip bounds + // will overflow 32767 when << by SHIFT, we can't supersample, + // so draw without antialiasing. + SkIRect clippedIR; + if (isInverse) { + // If the path is an inverse fill, it's going to fill the entire + // clip, and we care whether the entire clip exceeds our limits. + clippedIR = origClip.getBounds(); + } else { + if (!clippedIR.intersect(ir, origClip.getBounds())) { + return; + } + } + if (rect_overflows_short_shift(clippedIR, SK_SUPERSAMPLE_SHIFT)) { + SkScan::FillPath(path, origClip, blitter); + return; + } + + // Our antialiasing can't handle a clip larger than 32767, so we restrict + // the clip to that limit here. (the runs[] uses int16_t for its index). + // + // A more general solution (one that could also eliminate the need to + // disable aa based on ir bounds (see overflows_short_shift) would be + // to tile the clip/target... + SkRegion tmpClipStorage; + const SkRegion* clipRgn = &origClip; + { + static const int32_t kMaxClipCoord = 32767; + const SkIRect& bounds = origClip.getBounds(); + if (bounds.fRight > kMaxClipCoord || bounds.fBottom > kMaxClipCoord) { + SkIRect limit = { 0, 0, kMaxClipCoord, kMaxClipCoord }; + tmpClipStorage.op(origClip, limit, SkRegion::kIntersect_Op); + clipRgn = &tmpClipStorage; + } + } + // for here down, use clipRgn, not origClip + + SkScanClipper clipper(blitter, clipRgn, ir); + + if (clipper.getBlitter() == nullptr) { // clipped out + if (isInverse) { + blitter->blitRegion(*clipRgn); + } + return; + } + + SkASSERT(clipper.getClipRect() == nullptr || + *clipper.getClipRect() == clipRgn->getBounds()); + + // now use the (possibly wrapped) blitter + blitter = clipper.getBlitter(); + + if (isInverse) { + sk_blit_above(blitter, ir, *clipRgn); + } + + if (ShouldUseAAA(path)) { + // Do not use AAA if path is too complicated: + // there won't be any speedup or significant visual improvement. + SkScan::AAAFillPath(path, blitter, ir, clipRgn->getBounds(), forceRLE); + } else { + SkScan::SAAFillPath(path, blitter, ir, clipRgn->getBounds(), forceRLE); + } + + if (isInverse) { + sk_blit_below(blitter, ir, *clipRgn); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "src/core/SkRasterClip.h" + +void SkScan::FillPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + if (clip.isEmpty() || !path.isFinite()) { + return; + } + + if (clip.isBW()) { + FillPath(path, clip.bwRgn(), blitter); + } else { + SkRegion tmp; + SkAAClipBlitter aaBlitter; + + tmp.setRect(clip.getBounds()); + aaBlitter.init(blitter, &clip.aaRgn()); + SkScan::FillPath(path, tmp, &aaBlitter); + } +} + +void SkScan::AntiFillPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + if (clip.isEmpty() || !path.isFinite()) { + return; + } + + if (clip.isBW()) { + AntiFillPath(path, clip.bwRgn(), blitter, false); + } else { + SkRegion tmp; + SkAAClipBlitter aaBlitter; + + tmp.setRect(clip.getBounds()); + aaBlitter.init(blitter, &clip.aaRgn()); + AntiFillPath(path, tmp, &aaBlitter, true); // SkAAClipBlitter can blitMask, why forceRLE? + } +} diff --git a/gfx/skia/skia/src/core/SkScan_Antihair.cpp b/gfx/skia/skia/src/core/SkScan_Antihair.cpp new file mode 100644 index 0000000000..eceff4ca9c --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan_Antihair.cpp @@ -0,0 +1,1014 @@ +/* + * Copyright 2011 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkScan.h" + +#include "include/private/SkColorData.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkFDot6.h" +#include "src/core/SkLineClipper.h" +#include "src/core/SkRasterClip.h" + +#include + +/* Our attempt to compute the worst case "bounds" for the horizontal and + vertical cases has some numerical bug in it, and we sometimes undervalue + our extends. The bug is that when this happens, we will set the clip to + nullptr (for speed), and thus draw outside of the clip by a pixel, which might + only look bad, but it might also access memory outside of the valid range + allcoated for the device bitmap. + + This define enables our fix to outset our "bounds" by 1, thus avoiding the + chance of the bug, but at the cost of sometimes taking the rectblitter + case (i.e. not setting the clip to nullptr) when we might not actually need + to. If we can improve/fix the actual calculations, then we can remove this + step. + */ +#define OUTSET_BEFORE_CLIP_TEST true + +#define HLINE_STACK_BUFFER 100 + +static inline int SmallDot6Scale(int value, int dot6) { + SkASSERT((int16_t)value == value); + SkASSERT((unsigned)dot6 <= 64); + return (value * dot6) >> 6; +} + +//#define TEST_GAMMA + +#ifdef TEST_GAMMA + static uint8_t gGammaTable[256]; + #define ApplyGamma(table, alpha) (table)[alpha] + + static void build_gamma_table() { + static bool gInit = false; + + if (gInit == false) { + for (int i = 0; i < 256; i++) { + SkFixed n = i * 257; + n += n >> 15; + SkASSERT(n >= 0 && n <= SK_Fixed1); + n = SkFixedSqrt(n); + n = n * 255 >> 16; + // SkDebugf("morph %d -> %d\n", i, n); + gGammaTable[i] = SkToU8(n); + } + gInit = true; + } + } +#else + #define ApplyGamma(table, alpha) SkToU8(alpha) +#endif + +/////////////////////////////////////////////////////////////////////////////// + +static void call_hline_blitter(SkBlitter* blitter, int x, int y, int count, + U8CPU alpha) { + SkASSERT(count > 0); + + int16_t runs[HLINE_STACK_BUFFER + 1]; + uint8_t aa[HLINE_STACK_BUFFER]; + + do { + // In theory, we should be able to just do this once (outside of the loop), + // since aa[] and runs[] are supposed" to be const when we call the blitter. + // In reality, some wrapper-blitters (e.g. SkRgnClipBlitter) cast away that + // constness, and modify the buffers in-place. Hence the need to be defensive + // here and reseed the aa value. + aa[0] = ApplyGamma(gGammaTable, alpha); + + int n = count; + if (n > HLINE_STACK_BUFFER) { + n = HLINE_STACK_BUFFER; + } + runs[0] = SkToS16(n); + runs[n] = 0; + blitter->blitAntiH(x, y, aa, runs); + x += n; + count -= n; + } while (count > 0); +} + +class SkAntiHairBlitter { +public: + SkAntiHairBlitter() : fBlitter(nullptr) {} + virtual ~SkAntiHairBlitter() {} + + SkBlitter* getBlitter() const { return fBlitter; } + + void setup(SkBlitter* blitter) { + fBlitter = blitter; + } + + virtual SkFixed drawCap(int x, SkFixed fy, SkFixed slope, int mod64) = 0; + virtual SkFixed drawLine(int x, int stopx, SkFixed fy, SkFixed slope) = 0; + +private: + SkBlitter* fBlitter; +}; + +class HLine_SkAntiHairBlitter : public SkAntiHairBlitter { +public: + SkFixed drawCap(int x, SkFixed fy, SkFixed slope, int mod64) override { + fy += SK_Fixed1/2; + + int y = fy >> 16; + uint8_t a = (uint8_t)((fy >> 8) & 0xFF); + + // lower line + unsigned ma = SmallDot6Scale(a, mod64); + if (ma) { + call_hline_blitter(this->getBlitter(), x, y, 1, ma); + } + + // upper line + ma = SmallDot6Scale(255 - a, mod64); + if (ma) { + call_hline_blitter(this->getBlitter(), x, y - 1, 1, ma); + } + + return fy - SK_Fixed1/2; + } + + SkFixed drawLine(int x, int stopx, SkFixed fy, SkFixed slope) override { + SkASSERT(x < stopx); + int count = stopx - x; + fy += SK_Fixed1/2; + + int y = fy >> 16; + uint8_t a = (uint8_t)((fy >> 8) & 0xFF); + + // lower line + if (a) { + call_hline_blitter(this->getBlitter(), x, y, count, a); + } + + // upper line + a = 255 - a; + if (a) { + call_hline_blitter(this->getBlitter(), x, y - 1, count, a); + } + + return fy - SK_Fixed1/2; + } +}; + +class Horish_SkAntiHairBlitter : public SkAntiHairBlitter { +public: + SkFixed drawCap(int x, SkFixed fy, SkFixed dy, int mod64) override { + fy += SK_Fixed1/2; + + int lower_y = fy >> 16; + uint8_t a = (uint8_t)((fy >> 8) & 0xFF); + unsigned a0 = SmallDot6Scale(255 - a, mod64); + unsigned a1 = SmallDot6Scale(a, mod64); + this->getBlitter()->blitAntiV2(x, lower_y - 1, a0, a1); + + return fy + dy - SK_Fixed1/2; + } + + SkFixed drawLine(int x, int stopx, SkFixed fy, SkFixed dy) override { + SkASSERT(x < stopx); + + fy += SK_Fixed1/2; + SkBlitter* blitter = this->getBlitter(); + do { + int lower_y = fy >> 16; + uint8_t a = (uint8_t)((fy >> 8) & 0xFF); + blitter->blitAntiV2(x, lower_y - 1, 255 - a, a); + fy += dy; + } while (++x < stopx); + + return fy - SK_Fixed1/2; + } +}; + +class VLine_SkAntiHairBlitter : public SkAntiHairBlitter { +public: + SkFixed drawCap(int y, SkFixed fx, SkFixed dx, int mod64) override { + SkASSERT(0 == dx); + fx += SK_Fixed1/2; + + int x = fx >> 16; + int a = (uint8_t)((fx >> 8) & 0xFF); + + unsigned ma = SmallDot6Scale(a, mod64); + if (ma) { + this->getBlitter()->blitV(x, y, 1, ma); + } + ma = SmallDot6Scale(255 - a, mod64); + if (ma) { + this->getBlitter()->blitV(x - 1, y, 1, ma); + } + + return fx - SK_Fixed1/2; + } + + SkFixed drawLine(int y, int stopy, SkFixed fx, SkFixed dx) override { + SkASSERT(y < stopy); + SkASSERT(0 == dx); + fx += SK_Fixed1/2; + + int x = fx >> 16; + int a = (uint8_t)((fx >> 8) & 0xFF); + + if (a) { + this->getBlitter()->blitV(x, y, stopy - y, a); + } + a = 255 - a; + if (a) { + this->getBlitter()->blitV(x - 1, y, stopy - y, a); + } + + return fx - SK_Fixed1/2; + } +}; + +class Vertish_SkAntiHairBlitter : public SkAntiHairBlitter { +public: + SkFixed drawCap(int y, SkFixed fx, SkFixed dx, int mod64) override { + fx += SK_Fixed1/2; + + int x = fx >> 16; + uint8_t a = (uint8_t)((fx >> 8) & 0xFF); + this->getBlitter()->blitAntiH2(x - 1, y, + SmallDot6Scale(255 - a, mod64), SmallDot6Scale(a, mod64)); + + return fx + dx - SK_Fixed1/2; + } + + SkFixed drawLine(int y, int stopy, SkFixed fx, SkFixed dx) override { + SkASSERT(y < stopy); + fx += SK_Fixed1/2; + do { + int x = fx >> 16; + uint8_t a = (uint8_t)((fx >> 8) & 0xFF); + this->getBlitter()->blitAntiH2(x - 1, y, 255 - a, a); + fx += dx; + } while (++y < stopy); + + return fx - SK_Fixed1/2; + } +}; + +static inline SkFixed fastfixdiv(SkFDot6 a, SkFDot6 b) { + SkASSERT((SkLeftShift(a, 16) >> 16) == a); + SkASSERT(b != 0); + return SkLeftShift(a, 16) / b; +} + +#define SkBITCOUNT(x) (sizeof(x) << 3) + +#if 1 +// returns high-bit set iff x==0x8000... +static inline int bad_int(int x) { + return x & -x; +} + +static int any_bad_ints(int a, int b, int c, int d) { + return (bad_int(a) | bad_int(b) | bad_int(c) | bad_int(d)) >> (SkBITCOUNT(int) - 1); +} +#else +static inline int good_int(int x) { + return x ^ (1 << (SkBITCOUNT(x) - 1)); +} + +static int any_bad_ints(int a, int b, int c, int d) { + return !(good_int(a) & good_int(b) & good_int(c) & good_int(d)); +} +#endif + +#ifdef SK_DEBUG +static bool canConvertFDot6ToFixed(SkFDot6 x) { + const int maxDot6 = SK_MaxS32 >> (16 - 6); + return SkAbs32(x) <= maxDot6; +} +#endif + +/* + * We want the fractional part of ordinate, but we want multiples of 64 to + * return 64, not 0, so we can't just say (ordinate & 63). + * We basically want to compute those bits, and if they're 0, return 64. + * We can do that w/o a branch with an extra sub and add. + */ +static int contribution_64(SkFDot6 ordinate) { +#if 0 + int result = ordinate & 63; + if (0 == result) { + result = 64; + } +#else + int result = ((ordinate - 1) & 63) + 1; +#endif + SkASSERT(result > 0 && result <= 64); + return result; +} + +static void do_anti_hairline(SkFDot6 x0, SkFDot6 y0, SkFDot6 x1, SkFDot6 y1, + const SkIRect* clip, SkBlitter* blitter) { + // check for integer NaN (0x80000000) which we can't handle (can't negate it) + // It appears typically from a huge float (inf or nan) being converted to int. + // If we see it, just don't draw. + if (any_bad_ints(x0, y0, x1, y1)) { + return; + } + + // The caller must clip the line to [-32767.0 ... 32767.0] ahead of time + // (in dot6 format) + SkASSERT(canConvertFDot6ToFixed(x0)); + SkASSERT(canConvertFDot6ToFixed(y0)); + SkASSERT(canConvertFDot6ToFixed(x1)); + SkASSERT(canConvertFDot6ToFixed(y1)); + + if (SkAbs32(x1 - x0) > SkIntToFDot6(511) || SkAbs32(y1 - y0) > SkIntToFDot6(511)) { + /* instead of (x0 + x1) >> 1, we shift each separately. This is less + precise, but avoids overflowing the intermediate result if the + values are huge. A better fix might be to clip the original pts + directly (i.e. do the divide), so we don't spend time subdividing + huge lines at all. + */ + int hx = (x0 >> 1) + (x1 >> 1); + int hy = (y0 >> 1) + (y1 >> 1); + do_anti_hairline(x0, y0, hx, hy, clip, blitter); + do_anti_hairline(hx, hy, x1, y1, clip, blitter); + return; + } + + int scaleStart, scaleStop; + int istart, istop; + SkFixed fstart, slope; + + HLine_SkAntiHairBlitter hline_blitter; + Horish_SkAntiHairBlitter horish_blitter; + VLine_SkAntiHairBlitter vline_blitter; + Vertish_SkAntiHairBlitter vertish_blitter; + SkAntiHairBlitter* hairBlitter = nullptr; + + if (SkAbs32(x1 - x0) > SkAbs32(y1 - y0)) { // mostly horizontal + if (x0 > x1) { // we want to go left-to-right + using std::swap; + swap(x0, x1); + swap(y0, y1); + } + + istart = SkFDot6Floor(x0); + istop = SkFDot6Ceil(x1); + fstart = SkFDot6ToFixed(y0); + if (y0 == y1) { // completely horizontal, take fast case + slope = 0; + hairBlitter = &hline_blitter; + } else { + slope = fastfixdiv(y1 - y0, x1 - x0); + SkASSERT(slope >= -SK_Fixed1 && slope <= SK_Fixed1); + fstart += (slope * (32 - (x0 & 63)) + 32) >> 6; + hairBlitter = &horish_blitter; + } + + SkASSERT(istop > istart); + if (istop - istart == 1) { + // we are within a single pixel + scaleStart = x1 - x0; + SkASSERT(scaleStart >= 0 && scaleStart <= 64); + scaleStop = 0; + } else { + scaleStart = 64 - (x0 & 63); + scaleStop = x1 & 63; + } + + if (clip){ + if (istart >= clip->fRight || istop <= clip->fLeft) { + return; + } + if (istart < clip->fLeft) { + fstart += slope * (clip->fLeft - istart); + istart = clip->fLeft; + scaleStart = 64; + if (istop - istart == 1) { + // we are within a single pixel + scaleStart = contribution_64(x1); + scaleStop = 0; + } + } + if (istop > clip->fRight) { + istop = clip->fRight; + scaleStop = 0; // so we don't draw this last column + } + + SkASSERT(istart <= istop); + if (istart == istop) { + return; + } + // now test if our Y values are completely inside the clip + int top, bottom; + if (slope >= 0) { // T2B + top = SkFixedFloorToInt(fstart - SK_FixedHalf); + bottom = SkFixedCeilToInt(fstart + (istop - istart - 1) * slope + SK_FixedHalf); + } else { // B2T + bottom = SkFixedCeilToInt(fstart + SK_FixedHalf); + top = SkFixedFloorToInt(fstart + (istop - istart - 1) * slope - SK_FixedHalf); + } +#ifdef OUTSET_BEFORE_CLIP_TEST + top -= 1; + bottom += 1; +#endif + if (top >= clip->fBottom || bottom <= clip->fTop) { + return; + } + if (clip->fTop <= top && clip->fBottom >= bottom) { + clip = nullptr; + } + } + } else { // mostly vertical + if (y0 > y1) { // we want to go top-to-bottom + using std::swap; + swap(x0, x1); + swap(y0, y1); + } + + istart = SkFDot6Floor(y0); + istop = SkFDot6Ceil(y1); + fstart = SkFDot6ToFixed(x0); + if (x0 == x1) { + if (y0 == y1) { // are we zero length? + return; // nothing to do + } + slope = 0; + hairBlitter = &vline_blitter; + } else { + slope = fastfixdiv(x1 - x0, y1 - y0); + SkASSERT(slope <= SK_Fixed1 && slope >= -SK_Fixed1); + fstart += (slope * (32 - (y0 & 63)) + 32) >> 6; + hairBlitter = &vertish_blitter; + } + + SkASSERT(istop > istart); + if (istop - istart == 1) { + // we are within a single pixel + scaleStart = y1 - y0; + SkASSERT(scaleStart >= 0 && scaleStart <= 64); + scaleStop = 0; + } else { + scaleStart = 64 - (y0 & 63); + scaleStop = y1 & 63; + } + + if (clip) { + if (istart >= clip->fBottom || istop <= clip->fTop) { + return; + } + if (istart < clip->fTop) { + fstart += slope * (clip->fTop - istart); + istart = clip->fTop; + scaleStart = 64; + if (istop - istart == 1) { + // we are within a single pixel + scaleStart = contribution_64(y1); + scaleStop = 0; + } + } + if (istop > clip->fBottom) { + istop = clip->fBottom; + scaleStop = 0; // so we don't draw this last row + } + + SkASSERT(istart <= istop); + if (istart == istop) + return; + + // now test if our X values are completely inside the clip + int left, right; + if (slope >= 0) { // L2R + left = SkFixedFloorToInt(fstart - SK_FixedHalf); + right = SkFixedCeilToInt(fstart + (istop - istart - 1) * slope + SK_FixedHalf); + } else { // R2L + right = SkFixedCeilToInt(fstart + SK_FixedHalf); + left = SkFixedFloorToInt(fstart + (istop - istart - 1) * slope - SK_FixedHalf); + } +#ifdef OUTSET_BEFORE_CLIP_TEST + left -= 1; + right += 1; +#endif + if (left >= clip->fRight || right <= clip->fLeft) { + return; + } + if (clip->fLeft <= left && clip->fRight >= right) { + clip = nullptr; + } + } + } + + SkRectClipBlitter rectClipper; + if (clip) { + rectClipper.init(blitter, *clip); + blitter = &rectClipper; + } + + SkASSERT(hairBlitter); + hairBlitter->setup(blitter); + +#ifdef SK_DEBUG + if (scaleStart > 0 && scaleStop > 0) { + // be sure we don't draw twice in the same pixel + SkASSERT(istart < istop - 1); + } +#endif + + fstart = hairBlitter->drawCap(istart, fstart, slope, scaleStart); + istart += 1; + int fullSpans = istop - istart - (scaleStop > 0); + if (fullSpans > 0) { + fstart = hairBlitter->drawLine(istart, istart + fullSpans, fstart, slope); + } + if (scaleStop > 0) { + hairBlitter->drawCap(istop - 1, fstart, slope, scaleStop); + } +} + +void SkScan::AntiHairLineRgn(const SkPoint array[], int arrayCount, const SkRegion* clip, + SkBlitter* blitter) { + if (clip && clip->isEmpty()) { + return; + } + + SkASSERT(clip == nullptr || !clip->getBounds().isEmpty()); + +#ifdef TEST_GAMMA + build_gamma_table(); +#endif + + const SkScalar max = SkIntToScalar(32767); + const SkRect fixedBounds = SkRect::MakeLTRB(-max, -max, max, max); + + SkRect clipBounds; + if (clip) { + clipBounds.set(clip->getBounds()); + /* We perform integral clipping later on, but we do a scalar clip first + to ensure that our coordinates are expressible in fixed/integers. + + antialiased hairlines can draw up to 1/2 of a pixel outside of + their bounds, so we need to outset the clip before calling the + clipper. To make the numerics safer, we outset by a whole pixel, + since the 1/2 pixel boundary is important to the antihair blitter, + we don't want to risk numerical fate by chopping on that edge. + */ + clipBounds.outset(SK_Scalar1, SK_Scalar1); + } + + for (int i = 0; i < arrayCount - 1; ++i) { + SkPoint pts[2]; + + // We have to pre-clip the line to fit in a SkFixed, so we just chop + // the line. TODO find a way to actually draw beyond that range. + if (!SkLineClipper::IntersectLine(&array[i], fixedBounds, pts)) { + continue; + } + + if (clip && !SkLineClipper::IntersectLine(pts, clipBounds, pts)) { + continue; + } + + SkFDot6 x0 = SkScalarToFDot6(pts[0].fX); + SkFDot6 y0 = SkScalarToFDot6(pts[0].fY); + SkFDot6 x1 = SkScalarToFDot6(pts[1].fX); + SkFDot6 y1 = SkScalarToFDot6(pts[1].fY); + + if (clip) { + SkFDot6 left = std::min(x0, x1); + SkFDot6 top = std::min(y0, y1); + SkFDot6 right = std::max(x0, x1); + SkFDot6 bottom = std::max(y0, y1); + SkIRect ir; + + ir.setLTRB(SkFDot6Floor(left) - 1, + SkFDot6Floor(top) - 1, + SkFDot6Ceil(right) + 1, + SkFDot6Ceil(bottom) + 1); + + if (clip->quickReject(ir)) { + continue; + } + if (!clip->quickContains(ir)) { + SkRegion::Cliperator iter(*clip, ir); + const SkIRect* r = &iter.rect(); + + while (!iter.done()) { + do_anti_hairline(x0, y0, x1, y1, r, blitter); + iter.next(); + } + continue; + } + // fall through to no-clip case + } + do_anti_hairline(x0, y0, x1, y1, nullptr, blitter); + } +} + +void SkScan::AntiHairRect(const SkRect& rect, const SkRasterClip& clip, + SkBlitter* blitter) { + SkPoint pts[5]; + + pts[0].set(rect.fLeft, rect.fTop); + pts[1].set(rect.fRight, rect.fTop); + pts[2].set(rect.fRight, rect.fBottom); + pts[3].set(rect.fLeft, rect.fBottom); + pts[4] = pts[0]; + SkScan::AntiHairLine(pts, 5, clip, blitter); +} + +/////////////////////////////////////////////////////////////////////////////// + +typedef int FDot8; // 24.8 integer fixed point + +static inline FDot8 SkFixedToFDot8(SkFixed x) { + return (x + 0x80) >> 8; +} + +static void do_scanline(FDot8 L, int top, FDot8 R, U8CPU alpha, + SkBlitter* blitter) { + SkASSERT(L < R); + + if ((L >> 8) == ((R - 1) >> 8)) { // 1x1 pixel + blitter->blitV(L >> 8, top, 1, SkAlphaMul(alpha, R - L)); + return; + } + + int left = L >> 8; + + if (L & 0xFF) { + blitter->blitV(left, top, 1, SkAlphaMul(alpha, 256 - (L & 0xFF))); + left += 1; + } + + int rite = R >> 8; + int width = rite - left; + if (width > 0) { + call_hline_blitter(blitter, left, top, width, alpha); + } + if (R & 0xFF) { + blitter->blitV(rite, top, 1, SkAlphaMul(alpha, R & 0xFF)); + } +} + +static void antifilldot8(FDot8 L, FDot8 T, FDot8 R, FDot8 B, SkBlitter* blitter, + bool fillInner) { + // check for empty now that we're in our reduced precision space + if (L >= R || T >= B) { + return; + } + int top = T >> 8; + if (top == ((B - 1) >> 8)) { // just one scanline high + do_scanline(L, top, R, B - T - 1, blitter); + return; + } + + if (T & 0xFF) { + do_scanline(L, top, R, 256 - (T & 0xFF), blitter); + top += 1; + } + + int bot = B >> 8; + int height = bot - top; + if (height > 0) { + int left = L >> 8; + if (left == ((R - 1) >> 8)) { // just 1-pixel wide + blitter->blitV(left, top, height, R - L - 1); + } else { + if (L & 0xFF) { + blitter->blitV(left, top, height, 256 - (L & 0xFF)); + left += 1; + } + int rite = R >> 8; + int width = rite - left; + if (width > 0 && fillInner) { + blitter->blitRect(left, top, width, height); + } + if (R & 0xFF) { + blitter->blitV(rite, top, height, R & 0xFF); + } + } + } + + if (B & 0xFF) { + do_scanline(L, bot, R, B & 0xFF, blitter); + } +} + +static void antifillrect(const SkXRect& xr, SkBlitter* blitter) { + antifilldot8(SkFixedToFDot8(xr.fLeft), SkFixedToFDot8(xr.fTop), + SkFixedToFDot8(xr.fRight), SkFixedToFDot8(xr.fBottom), + blitter, true); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkScan::AntiFillXRect(const SkXRect& xr, const SkRegion* clip, + SkBlitter* blitter) { + if (nullptr == clip) { + antifillrect(xr, blitter); + } else { + SkIRect outerBounds; + XRect_roundOut(xr, &outerBounds); + + if (clip->isRect()) { + const SkIRect& clipBounds = clip->getBounds(); + + if (clipBounds.contains(outerBounds)) { + antifillrect(xr, blitter); + } else { + SkXRect tmpR; + // this keeps our original edges fractional + XRect_set(&tmpR, clipBounds); + if (tmpR.intersect(xr)) { + antifillrect(tmpR, blitter); + } + } + } else { + SkRegion::Cliperator clipper(*clip, outerBounds); + const SkIRect& rr = clipper.rect(); + + while (!clipper.done()) { + SkXRect tmpR; + + // this keeps our original edges fractional + XRect_set(&tmpR, rr); + if (tmpR.intersect(xr)) { + antifillrect(tmpR, blitter); + } + clipper.next(); + } + } + } +} + +void SkScan::AntiFillXRect(const SkXRect& xr, const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isBW()) { + AntiFillXRect(xr, &clip.bwRgn(), blitter); + } else { + SkIRect outerBounds; + XRect_roundOut(xr, &outerBounds); + + if (clip.quickContains(outerBounds)) { + AntiFillXRect(xr, nullptr, blitter); + } else { + SkAAClipBlitterWrapper wrapper(clip, blitter); + AntiFillXRect(xr, &wrapper.getRgn(), wrapper.getBlitter()); + } + } +} + +/* This takes a float-rect, but with the key improvement that it has + already been clipped, so we know that it is safe to convert it into a + XRect (fixedpoint), as it won't overflow. +*/ +static void antifillrect(const SkRect& r, SkBlitter* blitter) { + SkXRect xr; + + XRect_set(&xr, r); + antifillrect(xr, blitter); +} + +/* We repeat the clipping logic of AntiFillXRect because the float rect might + overflow if we blindly converted it to an XRect. This sucks that we have to + repeat the clipping logic, but I don't see how to share the code/logic. + + We clip r (as needed) into one or more (smaller) float rects, and then pass + those to our version of antifillrect, which converts it into an XRect and + then calls the blit. +*/ +void SkScan::AntiFillRect(const SkRect& origR, const SkRegion* clip, + SkBlitter* blitter) { + if (clip) { + SkRect newR; + newR.set(clip->getBounds()); + if (!newR.intersect(origR)) { + return; + } + + const SkIRect outerBounds = newR.roundOut(); + + if (clip->isRect()) { + antifillrect(newR, blitter); + } else { + SkRegion::Cliperator clipper(*clip, outerBounds); + while (!clipper.done()) { + newR.set(clipper.rect()); + if (newR.intersect(origR)) { + antifillrect(newR, blitter); + } + clipper.next(); + } + } + } else { + antifillrect(origR, blitter); + } +} + +void SkScan::AntiFillRect(const SkRect& r, const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isBW()) { + AntiFillRect(r, &clip.bwRgn(), blitter); + } else { + SkAAClipBlitterWrapper wrap(clip, blitter); + AntiFillRect(r, &wrap.getRgn(), wrap.getBlitter()); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +#define SkAlphaMulRound(a, b) SkMulDiv255Round(a, b) + +// calls blitRect() if the rectangle is non-empty +static void fillcheckrect(int L, int T, int R, int B, SkBlitter* blitter) { + if (L < R && T < B) { + blitter->blitRect(L, T, R - L, B - T); + } +} + +static inline FDot8 SkScalarToFDot8(SkScalar x) { + return (int)(x * 256); +} + +static inline int FDot8Floor(FDot8 x) { + return x >> 8; +} + +static inline int FDot8Ceil(FDot8 x) { + return (x + 0xFF) >> 8; +} + +// 1 - (1 - a)*(1 - b) +static inline U8CPU InvAlphaMul(U8CPU a, U8CPU b) { + // need precise rounding (not just SkAlphaMul) so that values like + // a=228, b=252 don't overflow the result + return SkToU8(a + b - SkAlphaMulRound(a, b)); +} + +static void inner_scanline(FDot8 L, int top, FDot8 R, U8CPU alpha, + SkBlitter* blitter) { + SkASSERT(L < R); + + if ((L >> 8) == ((R - 1) >> 8)) { // 1x1 pixel + FDot8 widClamp = R - L; + // border case clamp 256 to 255 instead of going through call_hline_blitter + // see skbug/4406 + widClamp = widClamp - (widClamp >> 8); + blitter->blitV(L >> 8, top, 1, InvAlphaMul(alpha, widClamp)); + return; + } + + int left = L >> 8; + if (L & 0xFF) { + blitter->blitV(left, top, 1, InvAlphaMul(alpha, L & 0xFF)); + left += 1; + } + + int rite = R >> 8; + int width = rite - left; + if (width > 0) { + call_hline_blitter(blitter, left, top, width, alpha); + } + + if (R & 0xFF) { + blitter->blitV(rite, top, 1, InvAlphaMul(alpha, ~R & 0xFF)); + } +} + +static void innerstrokedot8(FDot8 L, FDot8 T, FDot8 R, FDot8 B, + SkBlitter* blitter) { + SkASSERT(L < R && T < B); + + int top = T >> 8; + if (top == ((B - 1) >> 8)) { // just one scanline high + // We want the inverse of B-T, since we're the inner-stroke + int alpha = 256 - (B - T); + if (alpha) { + inner_scanline(L, top, R, alpha, blitter); + } + return; + } + + if (T & 0xFF) { + inner_scanline(L, top, R, T & 0xFF, blitter); + top += 1; + } + + int bot = B >> 8; + int height = bot - top; + if (height > 0) { + if (L & 0xFF) { + blitter->blitV(L >> 8, top, height, L & 0xFF); + } + if (R & 0xFF) { + blitter->blitV(R >> 8, top, height, ~R & 0xFF); + } + } + + if (B & 0xFF) { + inner_scanline(L, bot, R, ~B & 0xFF, blitter); + } +} + +static inline void align_thin_stroke(FDot8& edge1, FDot8& edge2) { + SkASSERT(edge1 <= edge2); + + if (FDot8Floor(edge1) == FDot8Floor(edge2)) { + edge2 -= (edge1 & 0xFF); + edge1 &= ~0xFF; + } +} + +void SkScan::AntiFrameRect(const SkRect& r, const SkPoint& strokeSize, + const SkRegion* clip, SkBlitter* blitter) { + SkASSERT(strokeSize.fX >= 0 && strokeSize.fY >= 0); + + SkScalar rx = SkScalarHalf(strokeSize.fX); + SkScalar ry = SkScalarHalf(strokeSize.fY); + + // outset by the radius + FDot8 outerL = SkScalarToFDot8(r.fLeft - rx); + FDot8 outerT = SkScalarToFDot8(r.fTop - ry); + FDot8 outerR = SkScalarToFDot8(r.fRight + rx); + FDot8 outerB = SkScalarToFDot8(r.fBottom + ry); + + SkIRect outer; + // set outer to the outer rect of the outer section + outer.setLTRB(FDot8Floor(outerL), FDot8Floor(outerT), FDot8Ceil(outerR), FDot8Ceil(outerB)); + + SkBlitterClipper clipper; + if (clip) { + if (clip->quickReject(outer)) { + return; + } + if (!clip->contains(outer)) { + blitter = clipper.apply(blitter, clip, &outer); + } + // now we can ignore clip for the rest of the function + } + + // in case we lost a bit with diameter/2 + rx = strokeSize.fX - rx; + ry = strokeSize.fY - ry; + + // inset by the radius + FDot8 innerL = SkScalarToFDot8(r.fLeft + rx); + FDot8 innerT = SkScalarToFDot8(r.fTop + ry); + FDot8 innerR = SkScalarToFDot8(r.fRight - rx); + FDot8 innerB = SkScalarToFDot8(r.fBottom - ry); + + // For sub-unit strokes, tweak the hulls such that one of the edges coincides with the pixel + // edge. This ensures that the general rect stroking logic below + // a) doesn't blit the same scanline twice + // b) computes the correct coverage when both edges fall within the same pixel + if (strokeSize.fX < 1 || strokeSize.fY < 1) { + align_thin_stroke(outerL, innerL); + align_thin_stroke(outerT, innerT); + align_thin_stroke(innerR, outerR); + align_thin_stroke(innerB, outerB); + } + + // stroke the outer hull + antifilldot8(outerL, outerT, outerR, outerB, blitter, false); + + // set outer to the outer rect of the middle section + outer.setLTRB(FDot8Ceil(outerL), FDot8Ceil(outerT), FDot8Floor(outerR), FDot8Floor(outerB)); + + if (innerL >= innerR || innerT >= innerB) { + fillcheckrect(outer.fLeft, outer.fTop, outer.fRight, outer.fBottom, + blitter); + } else { + SkIRect inner; + // set inner to the inner rect of the middle section + inner.setLTRB(FDot8Floor(innerL), FDot8Floor(innerT), FDot8Ceil(innerR), FDot8Ceil(innerB)); + + // draw the frame in 4 pieces + fillcheckrect(outer.fLeft, outer.fTop, outer.fRight, inner.fTop, + blitter); + fillcheckrect(outer.fLeft, inner.fTop, inner.fLeft, inner.fBottom, + blitter); + fillcheckrect(inner.fRight, inner.fTop, outer.fRight, inner.fBottom, + blitter); + fillcheckrect(outer.fLeft, inner.fBottom, outer.fRight, outer.fBottom, + blitter); + + // now stroke the inner rect, which is similar to antifilldot8() except that + // it treats the fractional coordinates with the inverse bias (since its + // inner). + innerstrokedot8(innerL, innerT, innerR, innerB, blitter); + } +} + +void SkScan::AntiFrameRect(const SkRect& r, const SkPoint& strokeSize, + const SkRasterClip& clip, SkBlitter* blitter) { + if (clip.isBW()) { + AntiFrameRect(r, strokeSize, &clip.bwRgn(), blitter); + } else { + SkAAClipBlitterWrapper wrap(clip, blitter); + AntiFrameRect(r, strokeSize, &wrap.getRgn(), wrap.getBlitter()); + } +} diff --git a/gfx/skia/skia/src/core/SkScan_Hairline.cpp b/gfx/skia/skia/src/core/SkScan_Hairline.cpp new file mode 100644 index 0000000000..9aee071c6e --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan_Hairline.cpp @@ -0,0 +1,743 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPaint.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkFDot6.h" +#include "src/core/SkLineClipper.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkScan.h" + +#include + +static void horiline(int x, int stopx, SkFixed fy, SkFixed dy, + SkBlitter* blitter) { + SkASSERT(x < stopx); + + do { + blitter->blitH(x, fy >> 16, 1); + fy += dy; + } while (++x < stopx); +} + +static void vertline(int y, int stopy, SkFixed fx, SkFixed dx, + SkBlitter* blitter) { + SkASSERT(y < stopy); + + do { + blitter->blitH(fx >> 16, y, 1); + fx += dx; + } while (++y < stopy); +} + +#ifdef SK_DEBUG +static bool canConvertFDot6ToFixed(SkFDot6 x) { + const int maxDot6 = SK_MaxS32 >> (16 - 6); + return SkAbs32(x) <= maxDot6; +} +#endif + +void SkScan::HairLineRgn(const SkPoint array[], int arrayCount, const SkRegion* clip, + SkBlitter* origBlitter) { + SkBlitterClipper clipper; + SkIRect clipR, ptsR; + + const SkScalar max = SkIntToScalar(32767); + const SkRect fixedBounds = SkRect::MakeLTRB(-max, -max, max, max); + + SkRect clipBounds; + if (clip) { + clipBounds.set(clip->getBounds()); + } + + for (int i = 0; i < arrayCount - 1; ++i) { + SkBlitter* blitter = origBlitter; + + SkPoint pts[2]; + + // We have to pre-clip the line to fit in a SkFixed, so we just chop + // the line. TODO find a way to actually draw beyond that range. + if (!SkLineClipper::IntersectLine(&array[i], fixedBounds, pts)) { + continue; + } + + // Perform a clip in scalar space, so we catch huge values which might + // be missed after we convert to SkFDot6 (overflow) + if (clip && !SkLineClipper::IntersectLine(pts, clipBounds, pts)) { + continue; + } + + SkFDot6 x0 = SkScalarToFDot6(pts[0].fX); + SkFDot6 y0 = SkScalarToFDot6(pts[0].fY); + SkFDot6 x1 = SkScalarToFDot6(pts[1].fX); + SkFDot6 y1 = SkScalarToFDot6(pts[1].fY); + + SkASSERT(canConvertFDot6ToFixed(x0)); + SkASSERT(canConvertFDot6ToFixed(y0)); + SkASSERT(canConvertFDot6ToFixed(x1)); + SkASSERT(canConvertFDot6ToFixed(y1)); + + if (clip) { + // now perform clipping again, as the rounding to dot6 can wiggle us + // our rects are really dot6 rects, but since we've already used + // lineclipper, we know they will fit in 32bits (26.6) + const SkIRect& bounds = clip->getBounds(); + + clipR.setLTRB(SkIntToFDot6(bounds.fLeft), SkIntToFDot6(bounds.fTop), + SkIntToFDot6(bounds.fRight), SkIntToFDot6(bounds.fBottom)); + ptsR.setLTRB(x0, y0, x1, y1); + ptsR.sort(); + + // outset the right and bottom, to account for how hairlines are + // actually drawn, which may hit the pixel to the right or below of + // the coordinate + ptsR.fRight += SK_FDot6One; + ptsR.fBottom += SK_FDot6One; + + if (!SkIRect::Intersects(ptsR, clipR)) { + continue; + } + if (!clip->isRect() || !clipR.contains(ptsR)) { + blitter = clipper.apply(origBlitter, clip); + } + } + + SkFDot6 dx = x1 - x0; + SkFDot6 dy = y1 - y0; + + if (SkAbs32(dx) > SkAbs32(dy)) { // mostly horizontal + if (x0 > x1) { // we want to go left-to-right + using std::swap; + swap(x0, x1); + swap(y0, y1); + } + int ix0 = SkFDot6Round(x0); + int ix1 = SkFDot6Round(x1); + if (ix0 == ix1) {// too short to draw + continue; + } +#if defined(SK_BUILD_FOR_FUZZER) + if ((ix1 - ix0) > 100000 || (ix1 - ix0) < 0) { + continue; // too big to draw + } +#endif + SkFixed slope = SkFixedDiv(dy, dx); + SkFixed startY = SkFDot6ToFixed(y0) + (slope * ((32 - x0) & 63) >> 6); + + horiline(ix0, ix1, startY, slope, blitter); + } else { // mostly vertical + if (y0 > y1) { // we want to go top-to-bottom + using std::swap; + swap(x0, x1); + swap(y0, y1); + } + int iy0 = SkFDot6Round(y0); + int iy1 = SkFDot6Round(y1); + if (iy0 == iy1) { // too short to draw + continue; + } +#if defined(SK_BUILD_FOR_FUZZER) + if ((iy1 - iy0) > 100000 || (iy1 - iy0) < 0) { + continue; // too big to draw + } +#endif + SkFixed slope = SkFixedDiv(dx, dy); + SkFixed startX = SkFDot6ToFixed(x0) + (slope * ((32 - y0) & 63) >> 6); + + vertline(iy0, iy1, startX, slope, blitter); + } + } +} + +// we don't just draw 4 lines, 'cause that can leave a gap in the bottom-right +// and double-hit the top-left. +void SkScan::HairRect(const SkRect& rect, const SkRasterClip& clip, SkBlitter* blitter) { + SkAAClipBlitterWrapper wrapper; + SkBlitterClipper clipper; + // Create the enclosing bounds of the hairrect. i.e. we will stroke the interior of r. + SkIRect r = SkIRect::MakeLTRB(SkScalarFloorToInt(rect.fLeft), + SkScalarFloorToInt(rect.fTop), + SkScalarFloorToInt(rect.fRight + 1), + SkScalarFloorToInt(rect.fBottom + 1)); + + // Note: r might be crazy big, if rect was huge, possibly getting pinned to max/min s32. + // We need to trim it back to something reasonable before we can query its width etc. + // since r.fRight - r.fLeft might wrap around to negative even if fRight > fLeft. + // + // We outset the clip bounds by 1 before intersecting, since r is being stroked and not filled + // so we don't want to pin an edge of it to the clip. The intersect's job is mostly to just + // get the actual edge values into a reasonable range (e.g. so width() can't overflow). + if (!r.intersect(clip.getBounds().makeOutset(1, 1))) { + return; + } + + if (clip.quickReject(r)) { + return; + } + if (!clip.quickContains(r)) { + const SkRegion* clipRgn; + if (clip.isBW()) { + clipRgn = &clip.bwRgn(); + } else { + wrapper.init(clip, blitter); + clipRgn = &wrapper.getRgn(); + blitter = wrapper.getBlitter(); + } + blitter = clipper.apply(blitter, clipRgn); + } + + int width = r.width(); + int height = r.height(); + + if ((width | height) == 0) { + return; + } + if (width <= 2 || height <= 2) { + blitter->blitRect(r.fLeft, r.fTop, width, height); + return; + } + // if we get here, we know we have 4 segments to draw + blitter->blitH(r.fLeft, r.fTop, width); // top + blitter->blitRect(r.fLeft, r.fTop + 1, 1, height - 2); // left + blitter->blitRect(r.fRight - 1, r.fTop + 1, 1, height - 2); // right + blitter->blitH(r.fLeft, r.fBottom - 1, width); // bottom +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "include/core/SkPath.h" +#include "src/base/SkVx.h" +#include "src/core/SkGeometry.h" + +#define kMaxCubicSubdivideLevel 9 +#define kMaxQuadSubdivideLevel 5 + +using float2 = skvx::float2; + +static uint32_t compute_int_quad_dist(const SkPoint pts[3]) { + // compute the vector between the control point ([1]) and the middle of the + // line connecting the start and end ([0] and [2]) + SkScalar dx = SkScalarHalf(pts[0].fX + pts[2].fX) - pts[1].fX; + SkScalar dy = SkScalarHalf(pts[0].fY + pts[2].fY) - pts[1].fY; + // we want everyone to be positive + dx = SkScalarAbs(dx); + dy = SkScalarAbs(dy); + // convert to whole pixel values (use ceiling to be conservative). + // assign to unsigned so we can safely add 1/2 of the smaller and still fit in + // uint32_t, since SkScalarCeilToInt() returns 31 bits at most. + uint32_t idx = SkScalarCeilToInt(dx); + uint32_t idy = SkScalarCeilToInt(dy); + // use the cheap approx for distance + if (idx > idy) { + return idx + (idy >> 1); + } else { + return idy + (idx >> 1); + } +} + +static void hair_quad(const SkPoint pts[3], const SkRegion* clip, + SkBlitter* blitter, int level, SkScan::HairRgnProc lineproc) { + SkASSERT(level <= kMaxQuadSubdivideLevel); + + SkQuadCoeff coeff(pts); + + const int lines = 1 << level; + float2 t(0); + float2 dt(SK_Scalar1 / lines); + + SkPoint tmp[(1 << kMaxQuadSubdivideLevel) + 1]; + SkASSERT((unsigned)lines < std::size(tmp)); + + tmp[0] = pts[0]; + float2 A = coeff.fA; + float2 B = coeff.fB; + float2 C = coeff.fC; + for (int i = 1; i < lines; ++i) { + t = t + dt; + ((A * t + B) * t + C).store(&tmp[i]); + } + tmp[lines] = pts[2]; + lineproc(tmp, lines + 1, clip, blitter); +} + +static SkRect compute_nocheck_quad_bounds(const SkPoint pts[3]) { + SkASSERT(SkScalarsAreFinite(&pts[0].fX, 6)); + + float2 min = float2::Load(pts); + float2 max = min; + for (int i = 1; i < 3; ++i) { + float2 pair = float2::Load(pts+i); + min = skvx::min(min, pair); + max = skvx::max(max, pair); + } + return { min[0], min[1], max[0], max[1] }; +} + +static bool is_inverted(const SkRect& r) { + return r.fLeft > r.fRight || r.fTop > r.fBottom; +} + +// Can't call SkRect::intersects, since it cares about empty, and we don't (since we tracking +// something to be stroked, so empty can still draw something (e.g. horizontal line) +static bool geometric_overlap(const SkRect& a, const SkRect& b) { + SkASSERT(!is_inverted(a) && !is_inverted(b)); + return a.fLeft < b.fRight && b.fLeft < a.fRight && + a.fTop < b.fBottom && b.fTop < a.fBottom; +} + +// Can't call SkRect::contains, since it cares about empty, and we don't (since we tracking +// something to be stroked, so empty can still draw something (e.g. horizontal line) +static bool geometric_contains(const SkRect& outer, const SkRect& inner) { + SkASSERT(!is_inverted(outer) && !is_inverted(inner)); + return inner.fRight <= outer.fRight && inner.fLeft >= outer.fLeft && + inner.fBottom <= outer.fBottom && inner.fTop >= outer.fTop; +} + +static inline void hairquad(const SkPoint pts[3], const SkRegion* clip, const SkRect* insetClip, const SkRect* outsetClip, + SkBlitter* blitter, int level, SkScan::HairRgnProc lineproc) { + if (insetClip) { + SkASSERT(outsetClip); + SkRect bounds = compute_nocheck_quad_bounds(pts); + if (!geometric_overlap(*outsetClip, bounds)) { + return; + } else if (geometric_contains(*insetClip, bounds)) { + clip = nullptr; + } + } + + hair_quad(pts, clip, blitter, level, lineproc); +} + +static inline SkScalar max_component(const float2& value) { + SkScalar components[2]; + value.store(components); + return std::max(components[0], components[1]); +} + +static inline int compute_cubic_segs(const SkPoint pts[4]) { + float2 p0 = from_point(pts[0]); + float2 p1 = from_point(pts[1]); + float2 p2 = from_point(pts[2]); + float2 p3 = from_point(pts[3]); + + const float2 oneThird(1.0f / 3.0f); + const float2 twoThird(2.0f / 3.0f); + + float2 p13 = oneThird * p3 + twoThird * p0; + float2 p23 = oneThird * p0 + twoThird * p3; + + SkScalar diff = max_component(max(abs(p1 - p13), abs(p2 - p23))); + SkScalar tol = SK_Scalar1 / 8; + + for (int i = 0; i < kMaxCubicSubdivideLevel; ++i) { + if (diff < tol) { + return 1 << i; + } + tol *= 4; + } + return 1 << kMaxCubicSubdivideLevel; +} + +static bool lt_90(SkPoint p0, SkPoint pivot, SkPoint p2) { + return SkVector::DotProduct(p0 - pivot, p2 - pivot) >= 0; +} + +// The off-curve points are "inside" the limits of the on-curve pts +static bool quick_cubic_niceness_check(const SkPoint pts[4]) { + return lt_90(pts[1], pts[0], pts[3]) && + lt_90(pts[2], pts[0], pts[3]) && + lt_90(pts[1], pts[3], pts[0]) && + lt_90(pts[2], pts[3], pts[0]); +} + +using mask2 = skvx::Vec<2, uint32_t>; + +static inline mask2 float2_is_finite(const float2& x) { + const mask2 exp_mask = mask2(0xFF << 23); + return (skvx::bit_pun(x) & exp_mask) != exp_mask; +} + +static void hair_cubic(const SkPoint pts[4], const SkRegion* clip, SkBlitter* blitter, + SkScan::HairRgnProc lineproc) { + const int lines = compute_cubic_segs(pts); + SkASSERT(lines > 0); + if (1 == lines) { + SkPoint tmp[2] = { pts[0], pts[3] }; + lineproc(tmp, 2, clip, blitter); + return; + } + + SkCubicCoeff coeff(pts); + + const float2 dt(SK_Scalar1 / lines); + float2 t(0); + + SkPoint tmp[(1 << kMaxCubicSubdivideLevel) + 1]; + SkASSERT((unsigned)lines < std::size(tmp)); + + tmp[0] = pts[0]; + float2 A = coeff.fA; + float2 B = coeff.fB; + float2 C = coeff.fC; + float2 D = coeff.fD; + mask2 is_finite(~0); // start out as true + for (int i = 1; i < lines; ++i) { + t = t + dt; + float2 p = ((A * t + B) * t + C) * t + D; + is_finite &= float2_is_finite(p); + p.store(&tmp[i]); + } + if (all(is_finite)) { + tmp[lines] = pts[3]; + lineproc(tmp, lines + 1, clip, blitter); + } // else some point(s) are non-finite, so don't draw +} + +static SkRect compute_nocheck_cubic_bounds(const SkPoint pts[4]) { + SkASSERT(SkScalarsAreFinite(&pts[0].fX, 8)); + + float2 min = float2::Load(pts); + float2 max = min; + for (int i = 1; i < 4; ++i) { + float2 pair = float2::Load(pts+i); + min = skvx::min(min, pair); + max = skvx::max(max, pair); + } + return { min[0], min[1], max[0], max[1] }; +} + +static inline void haircubic(const SkPoint pts[4], const SkRegion* clip, const SkRect* insetClip, const SkRect* outsetClip, + SkBlitter* blitter, int level, SkScan::HairRgnProc lineproc) { + if (insetClip) { + SkASSERT(outsetClip); + SkRect bounds = compute_nocheck_cubic_bounds(pts); + if (!geometric_overlap(*outsetClip, bounds)) { + return; + } else if (geometric_contains(*insetClip, bounds)) { + clip = nullptr; + } + } + + if (quick_cubic_niceness_check(pts)) { + hair_cubic(pts, clip, blitter, lineproc); + } else { + SkPoint tmp[13]; + SkScalar tValues[3]; + + int count = SkChopCubicAtMaxCurvature(pts, tmp, tValues); + for (int i = 0; i < count; i++) { + hair_cubic(&tmp[i * 3], clip, blitter, lineproc); + } + } +} + +static int compute_quad_level(const SkPoint pts[3]) { + uint32_t d = compute_int_quad_dist(pts); + /* quadratics approach the line connecting their start and end points + 4x closer with each subdivision, so we compute the number of + subdivisions to be the minimum need to get that distance to be less + than a pixel. + */ + int level = (33 - SkCLZ(d)) >> 1; + // safety check on level (from the previous version) + if (level > kMaxQuadSubdivideLevel) { + level = kMaxQuadSubdivideLevel; + } + return level; +} + +/* Extend the points in the direction of the starting or ending tangent by 1/2 unit to + account for a round or square cap. If there's no distance between the end point and + the control point, use the next control point to create a tangent. If the curve + is degenerate, move the cap out 1/2 unit horizontally. */ +template +void extend_pts(SkPath::Verb prevVerb, SkPath::Verb nextVerb, SkPoint* pts, int ptCount) { + SkASSERT(SkPaint::kSquare_Cap == capStyle || SkPaint::kRound_Cap == capStyle); + // The area of a circle is PI*R*R. For a unit circle, R=1/2, and the cap covers half of that. + const SkScalar capOutset = SkPaint::kSquare_Cap == capStyle ? 0.5f : SK_ScalarPI / 8; + if (SkPath::kMove_Verb == prevVerb) { + SkPoint* first = pts; + SkPoint* ctrl = first; + int controls = ptCount - 1; + SkVector tangent; + do { + tangent = *first - *++ctrl; + } while (tangent.isZero() && --controls > 0); + if (tangent.isZero()) { + tangent.set(1, 0); + controls = ptCount - 1; // If all points are equal, move all but one + } else { + tangent.normalize(); + } + do { // If the end point and control points are equal, loop to move them in tandem. + first->fX += tangent.fX * capOutset; + first->fY += tangent.fY * capOutset; + ++first; + } while (++controls < ptCount); + } + if (SkPath::kMove_Verb == nextVerb || SkPath::kDone_Verb == nextVerb + || SkPath::kClose_Verb == nextVerb) { + SkPoint* last = &pts[ptCount - 1]; + SkPoint* ctrl = last; + int controls = ptCount - 1; + SkVector tangent; + do { + tangent = *last - *--ctrl; + } while (tangent.isZero() && --controls > 0); + if (tangent.isZero()) { + tangent.set(-1, 0); + controls = ptCount - 1; + } else { + tangent.normalize(); + } + do { + last->fX += tangent.fX * capOutset; + last->fY += tangent.fY * capOutset; + --last; + } while (++controls < ptCount); + } +} + +template +void hair_path(const SkPath& path, const SkRasterClip& rclip, SkBlitter* blitter, + SkScan::HairRgnProc lineproc) { + if (path.isEmpty()) { + return; + } + + SkAAClipBlitterWrapper wrap; + const SkRegion* clip = nullptr; + SkRect insetStorage, outsetStorage; + const SkRect* insetClip = nullptr; + const SkRect* outsetClip = nullptr; + + { + const int capOut = SkPaint::kButt_Cap == capStyle ? 1 : 2; + const SkIRect ibounds = path.getBounds().roundOut().makeOutset(capOut, capOut); + if (rclip.quickReject(ibounds)) { + return; + } + if (!rclip.quickContains(ibounds)) { + if (rclip.isBW()) { + clip = &rclip.bwRgn(); + } else { + wrap.init(rclip, blitter); + blitter = wrap.getBlitter(); + clip = &wrap.getRgn(); + } + + /* + * We now cache two scalar rects, to use for culling per-segment (e.g. cubic). + * Since we're hairlining, the "bounds" of the control points isn't necessairly the + * limit of where a segment can draw (it might draw up to 1 pixel beyond in aa-hairs). + * + * Compute the pt-bounds per segment is easy, so we do that, and then inversely adjust + * the culling bounds so we can just do a straight compare per segment. + * + * insetClip is use for quick-accept (i.e. the segment is not clipped), so we inset + * it from the clip-bounds (since segment bounds can be off by 1). + * + * outsetClip is used for quick-reject (i.e. the segment is entirely outside), so we + * outset it from the clip-bounds. + */ + insetStorage.set(clip->getBounds()); + outsetStorage = insetStorage.makeOutset(1, 1); + insetStorage.inset(1, 1); + if (is_inverted(insetStorage)) { + /* + * our bounds checks assume the rects are never inverted. If insetting has + * created that, we assume that the area is too small to safely perform a + * quick-accept, so we just mark the rect as empty (so the quick-accept check + * will always fail. + */ + insetStorage.setEmpty(); // just so we don't pass an inverted rect + } + if (rclip.isRect()) { + insetClip = &insetStorage; + } + outsetClip = &outsetStorage; + } + } + + SkPathPriv::RangeIter iter = SkPathPriv::Iterate(path).begin(); + SkPathPriv::RangeIter end = SkPathPriv::Iterate(path).end(); + SkPoint pts[4], firstPt, lastPt; + SkPath::Verb prevVerb; + SkAutoConicToQuads converter; + + if (SkPaint::kButt_Cap != capStyle) { + prevVerb = SkPath::kDone_Verb; + } + while (iter != end) { + auto [pathVerb, pathPts, w] = *iter++; + SkPath::Verb verb = (SkPath::Verb)pathVerb; + SkPath::Verb nextVerb = (iter != end) ? (SkPath::Verb)iter.peekVerb() : SkPath::kDone_Verb; + memcpy(pts, pathPts, SkPathPriv::PtsInIter(verb) * sizeof(SkPoint)); + switch (verb) { + case SkPath::kMove_Verb: + firstPt = lastPt = pts[0]; + break; + case SkPath::kLine_Verb: + if (SkPaint::kButt_Cap != capStyle) { + extend_pts(prevVerb, nextVerb, pts, 2); + } + lineproc(pts, 2, clip, blitter); + lastPt = pts[1]; + break; + case SkPath::kQuad_Verb: + if (SkPaint::kButt_Cap != capStyle) { + extend_pts(prevVerb, nextVerb, pts, 3); + } + hairquad(pts, clip, insetClip, outsetClip, blitter, compute_quad_level(pts), lineproc); + lastPt = pts[2]; + break; + case SkPath::kConic_Verb: { + if (SkPaint::kButt_Cap != capStyle) { + extend_pts(prevVerb, nextVerb, pts, 3); + } + // how close should the quads be to the original conic? + const SkScalar tol = SK_Scalar1 / 4; + const SkPoint* quadPts = converter.computeQuads(pts, *w, tol); + for (int i = 0; i < converter.countQuads(); ++i) { + int level = compute_quad_level(quadPts); + hairquad(quadPts, clip, insetClip, outsetClip, blitter, level, lineproc); + quadPts += 2; + } + lastPt = pts[2]; + break; + } + case SkPath::kCubic_Verb: { + if (SkPaint::kButt_Cap != capStyle) { + extend_pts(prevVerb, nextVerb, pts, 4); + } + haircubic(pts, clip, insetClip, outsetClip, blitter, kMaxCubicSubdivideLevel, lineproc); + lastPt = pts[3]; + } break; + case SkPath::kClose_Verb: + pts[0] = lastPt; + pts[1] = firstPt; + if (SkPaint::kButt_Cap != capStyle && prevVerb == SkPath::kMove_Verb) { + // cap moveTo/close to match svg expectations for degenerate segments + extend_pts(prevVerb, nextVerb, pts, 2); + } + lineproc(pts, 2, clip, blitter); + break; + case SkPath::kDone_Verb: + break; + } + if (SkPaint::kButt_Cap != capStyle) { + if (prevVerb == SkPath::kMove_Verb && + verb >= SkPath::kLine_Verb && verb <= SkPath::kCubic_Verb) { + firstPt = pts[0]; // the curve moved the initial point, so close to it instead + } + prevVerb = verb; + } + } +} + +void SkScan::HairPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + hair_path(path, clip, blitter, SkScan::HairLineRgn); +} + +void SkScan::AntiHairPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + hair_path(path, clip, blitter, SkScan::AntiHairLineRgn); +} + +void SkScan::HairSquarePath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + hair_path(path, clip, blitter, SkScan::HairLineRgn); +} + +void SkScan::AntiHairSquarePath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + hair_path(path, clip, blitter, SkScan::AntiHairLineRgn); +} + +void SkScan::HairRoundPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + hair_path(path, clip, blitter, SkScan::HairLineRgn); +} + +void SkScan::AntiHairRoundPath(const SkPath& path, const SkRasterClip& clip, SkBlitter* blitter) { + hair_path(path, clip, blitter, SkScan::AntiHairLineRgn); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkScan::FrameRect(const SkRect& r, const SkPoint& strokeSize, + const SkRasterClip& clip, SkBlitter* blitter) { + SkASSERT(strokeSize.fX >= 0 && strokeSize.fY >= 0); + + if (strokeSize.fX < 0 || strokeSize.fY < 0) { + return; + } + + const SkScalar dx = strokeSize.fX; + const SkScalar dy = strokeSize.fY; + SkScalar rx = SkScalarHalf(dx); + SkScalar ry = SkScalarHalf(dy); + SkRect outer, tmp; + + outer.setLTRB(r.fLeft - rx, r.fTop - ry, r.fRight + rx, r.fBottom + ry); + + if (r.width() <= dx || r.height() <= dy) { + SkScan::FillRect(outer, clip, blitter); + return; + } + + tmp.setLTRB(outer.fLeft, outer.fTop, outer.fRight, outer.fTop + dy); + SkScan::FillRect(tmp, clip, blitter); + tmp.fTop = outer.fBottom - dy; + tmp.fBottom = outer.fBottom; + SkScan::FillRect(tmp, clip, blitter); + + tmp.setLTRB(outer.fLeft, outer.fTop + dy, outer.fLeft + dx, outer.fBottom - dy); + SkScan::FillRect(tmp, clip, blitter); + tmp.fLeft = outer.fRight - dx; + tmp.fRight = outer.fRight; + SkScan::FillRect(tmp, clip, blitter); +} + +void SkScan::HairLine(const SkPoint pts[], int count, const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isBW()) { + HairLineRgn(pts, count, &clip.bwRgn(), blitter); + } else { + const SkRegion* clipRgn = nullptr; + + SkRect r; + r.setBounds(pts, count); + r.outset(SK_ScalarHalf, SK_ScalarHalf); + + SkAAClipBlitterWrapper wrap; + if (!clip.quickContains(r.roundOut())) { + wrap.init(clip, blitter); + blitter = wrap.getBlitter(); + clipRgn = &wrap.getRgn(); + } + HairLineRgn(pts, count, clipRgn, blitter); + } +} + +void SkScan::AntiHairLine(const SkPoint pts[], int count, const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isBW()) { + AntiHairLineRgn(pts, count, &clip.bwRgn(), blitter); + } else { + const SkRegion* clipRgn = nullptr; + + SkRect r; + r.setBounds(pts, count); + + SkAAClipBlitterWrapper wrap; + if (!clip.quickContains(r.roundOut().makeOutset(1, 1))) { + wrap.init(clip, blitter); + blitter = wrap.getBlitter(); + clipRgn = &wrap.getRgn(); + } + AntiHairLineRgn(pts, count, clipRgn, blitter); + } +} diff --git a/gfx/skia/skia/src/core/SkScan_Path.cpp b/gfx/skia/skia/src/core/SkScan_Path.cpp new file mode 100644 index 0000000000..259e554a82 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan_Path.cpp @@ -0,0 +1,784 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" +#include "include/core/SkRegion.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkSafe32.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkTSort.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkEdge.h" +#include "src/core/SkEdgeBuilder.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkQuadClipper.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkRectPriv.h" +#include "src/core/SkScanPriv.h" + +#include + +#define kEDGE_HEAD_Y SK_MinS32 +#define kEDGE_TAIL_Y SK_MaxS32 + +#ifdef SK_DEBUG + static void validate_sort(const SkEdge* edge) { + int y = kEDGE_HEAD_Y; + + while (edge->fFirstY != SK_MaxS32) { + edge->validate(); + SkASSERT(y <= edge->fFirstY); + + y = edge->fFirstY; + edge = edge->fNext; + } + } +#else + #define validate_sort(edge) +#endif + +static void insert_new_edges(SkEdge* newEdge, int curr_y) { + if (newEdge->fFirstY != curr_y) { + return; + } + SkEdge* prev = newEdge->fPrev; + if (prev->fX <= newEdge->fX) { + return; + } + // find first x pos to insert + SkEdge* start = backward_insert_start(prev, newEdge->fX); + // insert the lot, fixing up the links as we go + do { + SkEdge* next = newEdge->fNext; + do { + if (start->fNext == newEdge) { + goto nextEdge; + } + SkEdge* after = start->fNext; + if (after->fX >= newEdge->fX) { + break; + } + start = after; + } while (true); + remove_edge(newEdge); + insert_edge_after(newEdge, start); +nextEdge: + start = newEdge; + newEdge = next; + } while (newEdge->fFirstY == curr_y); +} + +#ifdef SK_DEBUG +static void validate_edges_for_y(const SkEdge* edge, int curr_y) { + while (edge->fFirstY <= curr_y) { + SkASSERT(edge->fPrev && edge->fNext); + SkASSERT(edge->fPrev->fNext == edge); + SkASSERT(edge->fNext->fPrev == edge); + SkASSERT(edge->fFirstY <= edge->fLastY); + + SkASSERT(edge->fPrev->fX <= edge->fX); + edge = edge->fNext; + } +} +#else + #define validate_edges_for_y(edge, curr_y) +#endif + +#if defined _WIN32 // disable warning : local variable used without having been initialized +#pragma warning ( push ) +#pragma warning ( disable : 4701 ) +#endif + +typedef void (*PrePostProc)(SkBlitter* blitter, int y, bool isStartOfScanline); +#define PREPOST_START true +#define PREPOST_END false + +static void walk_edges(SkEdge* prevHead, SkPathFillType fillType, + SkBlitter* blitter, int start_y, int stop_y, + PrePostProc proc, int rightClip) { + validate_sort(prevHead->fNext); + + int curr_y = start_y; + int windingMask = SkPathFillType_IsEvenOdd(fillType) ? 1 : -1; + + for (;;) { + int w = 0; + int left SK_INIT_TO_AVOID_WARNING; + SkEdge* currE = prevHead->fNext; + SkFixed prevX = prevHead->fX; + + validate_edges_for_y(currE, curr_y); + + if (proc) { + proc(blitter, curr_y, PREPOST_START); // pre-proc + } + + while (currE->fFirstY <= curr_y) { + SkASSERT(currE->fLastY >= curr_y); + + int x = SkFixedRoundToInt(currE->fX); + + if ((w & windingMask) == 0) { // we're starting interval + left = x; + } + + w += currE->fWinding; + + if ((w & windingMask) == 0) { // we finished an interval + int width = x - left; + SkASSERT(width >= 0); + if (width > 0) { + blitter->blitH(left, curr_y, width); + } + } + + SkEdge* next = currE->fNext; + SkFixed newX; + + if (currE->fLastY == curr_y) { // are we done with this edge? + if (currE->fCurveCount > 0) { + if (((SkQuadraticEdge*)currE)->updateQuadratic()) { + newX = currE->fX; + goto NEXT_X; + } + } else if (currE->fCurveCount < 0) { + if (((SkCubicEdge*)currE)->updateCubic()) { + SkASSERT(currE->fFirstY == curr_y + 1); + + newX = currE->fX; + goto NEXT_X; + } + } + remove_edge(currE); + } else { + SkASSERT(currE->fLastY > curr_y); + newX = currE->fX + currE->fDX; + currE->fX = newX; + NEXT_X: + if (newX < prevX) { // ripple currE backwards until it is x-sorted + backward_insert_edge_based_on_x(currE); + } else { + prevX = newX; + } + } + currE = next; + SkASSERT(currE); + } + + if ((w & windingMask) != 0) { // was our right-edge culled away? + int width = rightClip - left; + if (width > 0) { + blitter->blitH(left, curr_y, width); + } + } + + if (proc) { + proc(blitter, curr_y, PREPOST_END); // post-proc + } + + curr_y += 1; + if (curr_y >= stop_y) { + break; + } + // now currE points to the first edge with a Yint larger than curr_y + insert_new_edges(currE, curr_y); + } +} + +// return true if we're NOT done with this edge +static bool update_edge(SkEdge* edge, int last_y) { + SkASSERT(edge->fLastY >= last_y); + if (last_y == edge->fLastY) { + if (edge->fCurveCount < 0) { + if (((SkCubicEdge*)edge)->updateCubic()) { + SkASSERT(edge->fFirstY == last_y + 1); + return true; + } + } else if (edge->fCurveCount > 0) { + if (((SkQuadraticEdge*)edge)->updateQuadratic()) { + SkASSERT(edge->fFirstY == last_y + 1); + return true; + } + } + return false; + } + return true; +} + +// Unexpected conditions for which we need to return +#define ASSERT_RETURN(cond) \ + do { \ + if (!(cond)) { \ + SkDEBUGFAILF("assert(%s)", #cond); \ + return; \ + } \ + } while (0) + +// Needs Y to only change once (looser than convex in X) +static void walk_simple_edges(SkEdge* prevHead, SkBlitter* blitter, int start_y, int stop_y) { + validate_sort(prevHead->fNext); + + SkEdge* leftE = prevHead->fNext; + SkEdge* riteE = leftE->fNext; + SkEdge* currE = riteE->fNext; + + // our edge choppers for curves can result in the initial edges + // not lining up, so we take the max. + int local_top = std::max(leftE->fFirstY, riteE->fFirstY); + ASSERT_RETURN(local_top >= start_y); + + while (local_top < stop_y) { + SkASSERT(leftE->fFirstY <= stop_y); + SkASSERT(riteE->fFirstY <= stop_y); + + int local_bot = std::min(leftE->fLastY, riteE->fLastY); + local_bot = std::min(local_bot, stop_y - 1); + ASSERT_RETURN(local_top <= local_bot); + + SkFixed left = leftE->fX; + SkFixed dLeft = leftE->fDX; + SkFixed rite = riteE->fX; + SkFixed dRite = riteE->fDX; + int count = local_bot - local_top; + ASSERT_RETURN(count >= 0); + + if (0 == (dLeft | dRite)) { + int L = SkFixedRoundToInt(left); + int R = SkFixedRoundToInt(rite); + if (L > R) { + std::swap(L, R); + } + if (L < R) { + count += 1; + blitter->blitRect(L, local_top, R - L, count); + } + local_top = local_bot + 1; + } else { + do { + int L = SkFixedRoundToInt(left); + int R = SkFixedRoundToInt(rite); + if (L > R) { + std::swap(L, R); + } + if (L < R) { + blitter->blitH(L, local_top, R - L); + } + // Either/both of these might overflow, since we perform this step even if + // (later) we determine that we are done with the edge, and so the computed + // left or rite edge will not be used (see update_edge). Use this helper to + // silence UBSAN when we perform the add. + left = Sk32_can_overflow_add(left, dLeft); + rite = Sk32_can_overflow_add(rite, dRite); + local_top += 1; + } while (--count >= 0); + } + + leftE->fX = left; + riteE->fX = rite; + + if (!update_edge(leftE, local_bot)) { + if (currE->fFirstY >= stop_y) { + return; // we're done + } + leftE = currE; + currE = currE->fNext; + ASSERT_RETURN(leftE->fFirstY == local_top); + } + if (!update_edge(riteE, local_bot)) { + if (currE->fFirstY >= stop_y) { + return; // we're done + } + riteE = currE; + currE = currE->fNext; + ASSERT_RETURN(riteE->fFirstY == local_top); + } + } +} + +/////////////////////////////////////////////////////////////////////////////// + +// this overrides blitH, and will call its proxy blitter with the inverse +// of the spans it is given (clipped to the left/right of the cliprect) +// +// used to implement inverse filltypes on paths +// +class InverseBlitter : public SkBlitter { +public: + void setBlitter(SkBlitter* blitter, const SkIRect& clip, int shift) { + fBlitter = blitter; + fFirstX = clip.fLeft << shift; + fLastX = clip.fRight << shift; + } + void prepost(int y, bool isStart) { + if (isStart) { + fPrevX = fFirstX; + } else { + int invWidth = fLastX - fPrevX; + if (invWidth > 0) { + fBlitter->blitH(fPrevX, y, invWidth); + } + } + } + + // overrides + void blitH(int x, int y, int width) override { + int invWidth = x - fPrevX; + if (invWidth > 0) { + fBlitter->blitH(fPrevX, y, invWidth); + } + fPrevX = x + width; + } + + // we do not expect to get called with these entrypoints + void blitAntiH(int, int, const SkAlpha[], const int16_t runs[]) override { + SkDEBUGFAIL("blitAntiH unexpected"); + } + void blitV(int x, int y, int height, SkAlpha alpha) override { + SkDEBUGFAIL("blitV unexpected"); + } + void blitRect(int x, int y, int width, int height) override { + SkDEBUGFAIL("blitRect unexpected"); + } + void blitMask(const SkMask&, const SkIRect& clip) override { + SkDEBUGFAIL("blitMask unexpected"); + } + const SkPixmap* justAnOpaqueColor(uint32_t* value) override { + SkDEBUGFAIL("justAnOpaqueColor unexpected"); + return nullptr; + } + +private: + SkBlitter* fBlitter; + int fFirstX, fLastX, fPrevX; +}; + +static void PrePostInverseBlitterProc(SkBlitter* blitter, int y, bool isStart) { + ((InverseBlitter*)blitter)->prepost(y, isStart); +} + +/////////////////////////////////////////////////////////////////////////////// + +#if defined _WIN32 +#pragma warning ( pop ) +#endif + +static bool operator<(const SkEdge& a, const SkEdge& b) { + int valuea = a.fFirstY; + int valueb = b.fFirstY; + + if (valuea == valueb) { + valuea = a.fX; + valueb = b.fX; + } + + return valuea < valueb; +} + +static SkEdge* sort_edges(SkEdge* list[], int count, SkEdge** last) { + SkTQSort(list, list + count); + + // now make the edges linked in sorted order + for (int i = 1; i < count; i++) { + list[i - 1]->fNext = list[i]; + list[i]->fPrev = list[i - 1]; + } + + *last = list[count - 1]; + return list[0]; +} + +// clipRect has not been shifted up +void sk_fill_path(const SkPath& path, const SkIRect& clipRect, SkBlitter* blitter, + int start_y, int stop_y, int shiftEdgesUp, bool pathContainedInClip) { + SkASSERT(blitter); + + SkIRect shiftedClip = clipRect; + shiftedClip.fLeft = SkLeftShift(shiftedClip.fLeft, shiftEdgesUp); + shiftedClip.fRight = SkLeftShift(shiftedClip.fRight, shiftEdgesUp); + shiftedClip.fTop = SkLeftShift(shiftedClip.fTop, shiftEdgesUp); + shiftedClip.fBottom = SkLeftShift(shiftedClip.fBottom, shiftEdgesUp); + + SkBasicEdgeBuilder builder(shiftEdgesUp); + int count = builder.buildEdges(path, pathContainedInClip ? nullptr : &shiftedClip); + SkEdge** list = builder.edgeList(); + + if (0 == count) { + if (path.isInverseFillType()) { + /* + * Since we are in inverse-fill, our caller has already drawn above + * our top (start_y) and will draw below our bottom (stop_y). Thus + * we need to restrict our drawing to the intersection of the clip + * and those two limits. + */ + SkIRect rect = clipRect; + if (rect.fTop < start_y) { + rect.fTop = start_y; + } + if (rect.fBottom > stop_y) { + rect.fBottom = stop_y; + } + if (!rect.isEmpty()) { + blitter->blitRect(rect.fLeft << shiftEdgesUp, + rect.fTop << shiftEdgesUp, + rect.width() << shiftEdgesUp, + rect.height() << shiftEdgesUp); + } + } + return; + } + + SkEdge headEdge, tailEdge, *last; + // this returns the first and last edge after they're sorted into a dlink list + SkEdge* edge = sort_edges(list, count, &last); + + headEdge.fPrev = nullptr; + headEdge.fNext = edge; + headEdge.fFirstY = kEDGE_HEAD_Y; + headEdge.fX = SK_MinS32; + edge->fPrev = &headEdge; + + tailEdge.fPrev = last; + tailEdge.fNext = nullptr; + tailEdge.fFirstY = kEDGE_TAIL_Y; + last->fNext = &tailEdge; + + // now edge is the head of the sorted linklist + + start_y = SkLeftShift(start_y, shiftEdgesUp); + stop_y = SkLeftShift(stop_y, shiftEdgesUp); + if (!pathContainedInClip && start_y < shiftedClip.fTop) { + start_y = shiftedClip.fTop; + } + if (!pathContainedInClip && stop_y > shiftedClip.fBottom) { + stop_y = shiftedClip.fBottom; + } + + InverseBlitter ib; + PrePostProc proc = nullptr; + + if (path.isInverseFillType()) { + ib.setBlitter(blitter, clipRect, shiftEdgesUp); + blitter = &ib; + proc = PrePostInverseBlitterProc; + } + + // count >= 2 is required as the convex walker does not handle missing right edges + if (path.isConvex() && (nullptr == proc) && count >= 2) { + walk_simple_edges(&headEdge, blitter, start_y, stop_y); + } else { + walk_edges(&headEdge, path.getFillType(), blitter, start_y, stop_y, proc, + shiftedClip.right()); + } +} + +void sk_blit_above(SkBlitter* blitter, const SkIRect& ir, const SkRegion& clip) { + const SkIRect& cr = clip.getBounds(); + SkIRect tmp; + + tmp.fLeft = cr.fLeft; + tmp.fRight = cr.fRight; + tmp.fTop = cr.fTop; + tmp.fBottom = ir.fTop; + if (!tmp.isEmpty()) { + blitter->blitRectRegion(tmp, clip); + } +} + +void sk_blit_below(SkBlitter* blitter, const SkIRect& ir, const SkRegion& clip) { + const SkIRect& cr = clip.getBounds(); + SkIRect tmp; + + tmp.fLeft = cr.fLeft; + tmp.fRight = cr.fRight; + tmp.fTop = ir.fBottom; + tmp.fBottom = cr.fBottom; + if (!tmp.isEmpty()) { + blitter->blitRectRegion(tmp, clip); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +/** + * If the caller is drawing an inverse-fill path, then it pass true for + * skipRejectTest, so we don't abort drawing just because the src bounds (ir) + * is outside of the clip. + */ +SkScanClipper::SkScanClipper(SkBlitter* blitter, const SkRegion* clip, + const SkIRect& ir, bool skipRejectTest, bool irPreClipped) { + fBlitter = nullptr; // null means blit nothing + fClipRect = nullptr; + + if (clip) { + fClipRect = &clip->getBounds(); + if (!skipRejectTest && !SkIRect::Intersects(*fClipRect, ir)) { // completely clipped out + return; + } + + if (clip->isRect()) { + if (!irPreClipped && fClipRect->contains(ir)) { +#ifdef SK_DEBUG + fRectClipCheckBlitter.init(blitter, *fClipRect); + blitter = &fRectClipCheckBlitter; +#endif + fClipRect = nullptr; + } else { + // only need a wrapper blitter if we're horizontally clipped + if (irPreClipped || + fClipRect->fLeft > ir.fLeft || fClipRect->fRight < ir.fRight) { + fRectBlitter.init(blitter, *fClipRect); + blitter = &fRectBlitter; + } else { +#ifdef SK_DEBUG + fRectClipCheckBlitter.init(blitter, *fClipRect); + blitter = &fRectClipCheckBlitter; +#endif + } + } + } else { + fRgnBlitter.init(blitter, clip); + blitter = &fRgnBlitter; + } + } + fBlitter = blitter; +} + +/////////////////////////////////////////////////////////////////////////////// + +static bool clip_to_limit(const SkRegion& orig, SkRegion* reduced) { + // need to limit coordinates such that the width/height of our rect can be represented + // in SkFixed (16.16). See skbug.com/7998 + const int32_t limit = 32767 >> 1; + + SkIRect limitR; + limitR.setLTRB(-limit, -limit, limit, limit); + if (limitR.contains(orig.getBounds())) { + return false; + } + reduced->op(orig, limitR, SkRegion::kIntersect_Op); + return true; +} + +// Bias used for conservative rounding of float rects to int rects, to nudge the irects a little +// larger, so we don't "think" a path's bounds are inside a clip, when (due to numeric drift in +// the scan-converter) we might walk beyond the predicted limits. +// +// This value has been determined trial and error: pick the smallest value (after the 0.5) that +// fixes any problematic cases (e.g. crbug.com/844457) +// NOTE: cubics appear to be the main reason for needing this slop. If we could (perhaps) have a +// more accurate walker for cubics, we may be able to reduce this fudge factor. +static const double kConservativeRoundBias = 0.5 + 1.5 / SK_FDot6One; + +/** + * Round the value down. This is used to round the top and left of a rectangle, + * and corresponds to the way the scan converter treats the top and left edges. + * It has a slight bias to make the "rounded" int smaller than a normal round, to create a more + * conservative int-bounds (larger) from a float rect. + */ +static inline int round_down_to_int(SkScalar x) { + double xx = x; + xx -= kConservativeRoundBias; + return sk_double_saturate2int(ceil(xx)); +} + +/** + * Round the value up. This is used to round the right and bottom of a rectangle. + * It has a slight bias to make the "rounded" int smaller than a normal round, to create a more + * conservative int-bounds (larger) from a float rect. + */ +static inline int round_up_to_int(SkScalar x) { + double xx = x; + xx += kConservativeRoundBias; + return sk_double_saturate2int(floor(xx)); +} + +/* + * Conservative rounding function, which effectively nudges the int-rect to be slightly larger + * than SkRect::round() might have produced. This is a safety-net for the scan-converter, which + * inspects the returned int-rect, and may disable clipping (for speed) if it thinks all of the + * edges will fit inside the clip's bounds. The scan-converter introduces slight numeric errors + * due to accumulated += of the slope, so this function is used to return a conservatively large + * int-bounds, and thus we will only disable clipping if we're sure the edges will stay in-bounds. + */ +static SkIRect conservative_round_to_int(const SkRect& src) { + return { + round_down_to_int(src.fLeft), + round_down_to_int(src.fTop), + round_up_to_int(src.fRight), + round_up_to_int(src.fBottom), + }; +} + +void SkScan::FillPath(const SkPath& path, const SkRegion& origClip, + SkBlitter* blitter) { + if (origClip.isEmpty()) { + return; + } + + // Our edges are fixed-point, and don't like the bounds of the clip to + // exceed that. Here we trim the clip just so we don't overflow later on + const SkRegion* clipPtr = &origClip; + SkRegion finiteClip; + if (clip_to_limit(origClip, &finiteClip)) { + if (finiteClip.isEmpty()) { + return; + } + clipPtr = &finiteClip; + } + // don't reference "origClip" any more, just use clipPtr + + + SkRect bounds = path.getBounds(); + bool irPreClipped = false; + if (!SkRectPriv::MakeLargeS32().contains(bounds)) { + if (!bounds.intersect(SkRectPriv::MakeLargeS32())) { + bounds.setEmpty(); + } + irPreClipped = true; + } + + SkIRect ir = conservative_round_to_int(bounds); + if (ir.isEmpty()) { + if (path.isInverseFillType()) { + blitter->blitRegion(*clipPtr); + } + return; + } + + SkScanClipper clipper(blitter, clipPtr, ir, path.isInverseFillType(), irPreClipped); + + blitter = clipper.getBlitter(); + if (blitter) { + // we have to keep our calls to blitter in sorted order, so we + // must blit the above section first, then the middle, then the bottom. + if (path.isInverseFillType()) { + sk_blit_above(blitter, ir, *clipPtr); + } + SkASSERT(clipper.getClipRect() == nullptr || + *clipper.getClipRect() == clipPtr->getBounds()); + sk_fill_path(path, clipPtr->getBounds(), blitter, ir.fTop, ir.fBottom, + 0, clipper.getClipRect() == nullptr); + if (path.isInverseFillType()) { + sk_blit_below(blitter, ir, *clipPtr); + } + } else { + // what does it mean to not have a blitter if path.isInverseFillType??? + } +} + +void SkScan::FillPath(const SkPath& path, const SkIRect& ir, + SkBlitter* blitter) { + SkRegion rgn(ir); + FillPath(path, rgn, blitter); +} + +bool SkScan::PathRequiresTiling(const SkIRect& bounds) { + SkRegion out; // ignored + return clip_to_limit(SkRegion(bounds), &out); +} + +/////////////////////////////////////////////////////////////////////////////// + +static int build_tri_edges(SkEdge edge[], const SkPoint pts[], + const SkIRect* clipRect, SkEdge* list[]) { + SkEdge** start = list; + + if (edge->setLine(pts[0], pts[1], clipRect, 0)) { + *list++ = edge; + edge = (SkEdge*)((char*)edge + sizeof(SkEdge)); + } + if (edge->setLine(pts[1], pts[2], clipRect, 0)) { + *list++ = edge; + edge = (SkEdge*)((char*)edge + sizeof(SkEdge)); + } + if (edge->setLine(pts[2], pts[0], clipRect, 0)) { + *list++ = edge; + } + return (int)(list - start); +} + + +static void sk_fill_triangle(const SkPoint pts[], const SkIRect* clipRect, + SkBlitter* blitter, const SkIRect& ir) { + SkASSERT(pts && blitter); + + SkEdge edgeStorage[3]; + SkEdge* list[3]; + + int count = build_tri_edges(edgeStorage, pts, clipRect, list); + if (count < 2) { + return; + } + + SkEdge headEdge, tailEdge, *last; + + // this returns the first and last edge after they're sorted into a dlink list + SkEdge* edge = sort_edges(list, count, &last); + + headEdge.fPrev = nullptr; + headEdge.fNext = edge; + headEdge.fFirstY = kEDGE_HEAD_Y; + headEdge.fX = SK_MinS32; + edge->fPrev = &headEdge; + + tailEdge.fPrev = last; + tailEdge.fNext = nullptr; + tailEdge.fFirstY = kEDGE_TAIL_Y; + last->fNext = &tailEdge; + + // now edge is the head of the sorted linklist + int stop_y = ir.fBottom; + if (clipRect && stop_y > clipRect->fBottom) { + stop_y = clipRect->fBottom; + } + int start_y = ir.fTop; + if (clipRect && start_y < clipRect->fTop) { + start_y = clipRect->fTop; + } + walk_simple_edges(&headEdge, blitter, start_y, stop_y); +} + +void SkScan::FillTriangle(const SkPoint pts[], const SkRasterClip& clip, + SkBlitter* blitter) { + if (clip.isEmpty()) { + return; + } + + SkRect r; + r.setBounds(pts, 3); + // If r is too large (larger than can easily fit in SkFixed) then we need perform geometric + // clipping. This is a bit of work, so we just call the general FillPath() to handle it. + // Use FixedMax/2 as the limit so we can subtract two edges and still store that in Fixed. + const SkScalar limit = SK_MaxS16 >> 1; + if (!SkRect::MakeLTRB(-limit, -limit, limit, limit).contains(r)) { + SkPath path; + path.addPoly(pts, 3, false); + FillPath(path, clip, blitter); + return; + } + + SkIRect ir = conservative_round_to_int(r); + if (ir.isEmpty() || !SkIRect::Intersects(ir, clip.getBounds())) { + return; + } + + SkAAClipBlitterWrapper wrap; + const SkRegion* clipRgn; + if (clip.isBW()) { + clipRgn = &clip.bwRgn(); + } else { + wrap.init(clip, blitter); + clipRgn = &wrap.getRgn(); + blitter = wrap.getBlitter(); + } + + SkScanClipper clipper(blitter, clipRgn, ir); + blitter = clipper.getBlitter(); + if (blitter) { + sk_fill_triangle(pts, clipper.getClipRect(), blitter, ir); + } +} diff --git a/gfx/skia/skia/src/core/SkScan_SAAPath.cpp b/gfx/skia/skia/src/core/SkScan_SAAPath.cpp new file mode 100644 index 0000000000..ec9b1ecea0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkScan_SAAPath.cpp @@ -0,0 +1,611 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkScanPriv.h" + +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkRegion.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkAntiRun.h" +#include "src/core/SkBlitter.h" + +#if defined(SK_FORCE_AAA) + +void SkScan::SAAFillPath(const SkPath&, SkBlitter*, const SkIRect&, const SkIRect&, bool) { + SkDEBUGFAIL("SAA Disabled"); +} + +#else + +#define SHIFT SK_SUPERSAMPLE_SHIFT +#define SCALE (1 << SHIFT) +#define MASK (SCALE - 1) + +/** @file + We have two techniques for capturing the output of the supersampler: + - SUPERMASK, which records a large mask-bitmap + this is often faster for small, complex objects + - RLE, which records a rle-encoded scanline + this is often faster for large objects with big spans + + These blitters use two coordinate systems: + - destination coordinates, scale equal to the output - often + abbreviated with 'i' or 'I' in variable names + - supersampled coordinates, scale equal to the output * SCALE + */ + +//#define FORCE_SUPERMASK +//#define FORCE_RLE + +/////////////////////////////////////////////////////////////////////////////// + +/// Base class for a single-pass supersampled blitter. +class BaseSuperBlitter : public SkBlitter { +public: + BaseSuperBlitter(SkBlitter* realBlitter, const SkIRect& ir, + const SkIRect& clipBounds, bool isInverse); + + /// Must be explicitly defined on subclasses. + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override { + SkDEBUGFAIL("How did I get here?"); + } + /// May not be called on BaseSuperBlitter because it blits out of order. + void blitV(int x, int y, int height, SkAlpha alpha) override { + SkDEBUGFAIL("How did I get here?"); + } + +protected: + SkBlitter* fRealBlitter; + /// Current y coordinate, in destination coordinates. + int fCurrIY; + /// Widest row of region to be blitted, in destination coordinates. + int fWidth; + /// Leftmost x coordinate in any row, in destination coordinates. + int fLeft; + /// Leftmost x coordinate in any row, in supersampled coordinates. + int fSuperLeft; + + SkDEBUGCODE(int fCurrX;) + /// Current y coordinate in supersampled coordinates. + int fCurrY; + /// Initial y coordinate (top of bounds). + int fTop; + + SkIRect fSectBounds; +}; + +BaseSuperBlitter::BaseSuperBlitter(SkBlitter* realBlit, const SkIRect& ir, + const SkIRect& clipBounds, bool isInverse) { + fRealBlitter = realBlit; + + SkIRect sectBounds; + if (isInverse) { + // We use the clip bounds instead of the ir, since we may be asked to + //draw outside of the rect when we're a inverse filltype + sectBounds = clipBounds; + } else { + if (!sectBounds.intersect(ir, clipBounds)) { + sectBounds.setEmpty(); + } + } + + const int left = sectBounds.left(); + const int right = sectBounds.right(); + + fLeft = left; + fSuperLeft = SkLeftShift(left, SHIFT); + fWidth = right - left; + fTop = sectBounds.top(); + fCurrIY = fTop - 1; + fCurrY = SkLeftShift(fTop, SHIFT) - 1; + + SkDEBUGCODE(fCurrX = -1;) +} + +/// Run-length-encoded supersampling antialiased blitter. +class SuperBlitter : public BaseSuperBlitter { +public: + SuperBlitter(SkBlitter* realBlitter, const SkIRect& ir, const SkIRect& clipBounds, + bool isInverse); + + ~SuperBlitter() override { + this->flush(); + } + + /// Once fRuns contains a complete supersampled row, flush() blits + /// it out through the wrapped blitter. + void flush(); + + /// Blits a row of pixels, with location and width specified + /// in supersampled coordinates. + void blitH(int x, int y, int width) override; + /// Blits a rectangle of pixels, with location and size specified + /// in supersampled coordinates. + void blitRect(int x, int y, int width, int height) override; + +private: + // The next three variables are used to track a circular buffer that + // contains the values used in SkAlphaRuns. These variables should only + // ever be updated in advanceRuns(), and fRuns should always point to + // a valid SkAlphaRuns... + int fRunsToBuffer; + void* fRunsBuffer; + int fCurrentRun; + SkAlphaRuns fRuns; + + // extra one to store the zero at the end + int getRunsSz() const { return (fWidth + 1 + (fWidth + 2)/2) * sizeof(int16_t); } + + // This function updates the fRuns variable to point to the next buffer space + // with adequate storage for a SkAlphaRuns. It mostly just advances fCurrentRun + // and resets fRuns to point to an empty scanline. + void advanceRuns() { + const size_t kRunsSz = this->getRunsSz(); + fCurrentRun = (fCurrentRun + 1) % fRunsToBuffer; + fRuns.fRuns = reinterpret_cast( + reinterpret_cast(fRunsBuffer) + fCurrentRun * kRunsSz); + fRuns.fAlpha = reinterpret_cast(fRuns.fRuns + fWidth + 1); + fRuns.reset(fWidth); + } + + int fOffsetX; +}; + +SuperBlitter::SuperBlitter(SkBlitter* realBlitter, const SkIRect& ir, const SkIRect& clipBounds, + bool isInverse) + : BaseSuperBlitter(realBlitter, ir, clipBounds, isInverse) +{ + fRunsToBuffer = realBlitter->requestRowsPreserved(); + fRunsBuffer = realBlitter->allocBlitMemory(fRunsToBuffer * this->getRunsSz()); + fCurrentRun = -1; + + this->advanceRuns(); + + fOffsetX = 0; +} + +void SuperBlitter::flush() { + if (fCurrIY >= fTop) { + + SkASSERT(fCurrentRun < fRunsToBuffer); + if (!fRuns.empty()) { + // SkDEBUGCODE(fRuns.dump();) + fRealBlitter->blitAntiH(fLeft, fCurrIY, fRuns.fAlpha, fRuns.fRuns); + this->advanceRuns(); + fOffsetX = 0; + } + + fCurrIY = fTop - 1; + SkDEBUGCODE(fCurrX = -1;) + } +} + +/** coverage_to_partial_alpha() is being used by SkAlphaRuns, which + *accumulates* SCALE pixels worth of "alpha" in [0,(256/SCALE)] + to produce a final value in [0, 255] and handles clamping 256->255 + itself, with the same (alpha - (alpha >> 8)) correction as + coverage_to_exact_alpha(). +*/ +static inline int coverage_to_partial_alpha(int aa) { + aa <<= 8 - 2*SHIFT; + return aa; +} + +/** coverage_to_exact_alpha() is being used by our blitter, which wants + a final value in [0, 255]. +*/ +static inline int coverage_to_exact_alpha(int aa) { + int alpha = (256 >> SHIFT) * aa; + // clamp 256->255 + return alpha - (alpha >> 8); +} + +void SuperBlitter::blitH(int x, int y, int width) { + SkASSERT(width > 0); + + int iy = y >> SHIFT; + SkASSERT(iy >= fCurrIY); + + x -= fSuperLeft; + // hack, until I figure out why my cubics (I think) go beyond the bounds + if (x < 0) { + width += x; + x = 0; + } + +#ifdef SK_DEBUG + SkASSERT(y != fCurrY || x >= fCurrX); +#endif + SkASSERT(y >= fCurrY); + if (fCurrY != y) { + fOffsetX = 0; + fCurrY = y; + } + + if (iy != fCurrIY) { // new scanline + this->flush(); + fCurrIY = iy; + } + + int start = x; + int stop = x + width; + + SkASSERT(start >= 0 && stop > start); + // integer-pixel-aligned ends of blit, rounded out + int fb = start & MASK; + int fe = stop & MASK; + int n = (stop >> SHIFT) - (start >> SHIFT) - 1; + + if (n < 0) { + fb = fe - fb; + n = 0; + fe = 0; + } else { + if (fb == 0) { + n += 1; + } else { + fb = SCALE - fb; + } + } + + fOffsetX = fRuns.add(x >> SHIFT, coverage_to_partial_alpha(fb), + n, coverage_to_partial_alpha(fe), + (1 << (8 - SHIFT)) - (((y & MASK) + 1) >> SHIFT), + fOffsetX); + +#ifdef SK_DEBUG + fRuns.assertValid(y & MASK, (1 << (8 - SHIFT))); + fCurrX = x + width; +#endif +} + +#if 0 // UNUSED +static void set_left_rite_runs(SkAlphaRuns& runs, int ileft, U8CPU leftA, + int n, U8CPU riteA) { + SkASSERT(leftA <= 0xFF); + SkASSERT(riteA <= 0xFF); + + int16_t* run = runs.fRuns; + uint8_t* aa = runs.fAlpha; + + if (ileft > 0) { + run[0] = ileft; + aa[0] = 0; + run += ileft; + aa += ileft; + } + + SkASSERT(leftA < 0xFF); + if (leftA > 0) { + *run++ = 1; + *aa++ = leftA; + } + + if (n > 0) { + run[0] = n; + aa[0] = 0xFF; + run += n; + aa += n; + } + + SkASSERT(riteA < 0xFF); + if (riteA > 0) { + *run++ = 1; + *aa++ = riteA; + } + run[0] = 0; +} +#endif + +void SuperBlitter::blitRect(int x, int y, int width, int height) { + SkASSERT(width > 0); + SkASSERT(height > 0); + + // blit leading rows + while ((y & MASK)) { + this->blitH(x, y++, width); + if (--height <= 0) { + return; + } + } + SkASSERT(height > 0); + + // Since this is a rect, instead of blitting supersampled rows one at a + // time and then resolving to the destination canvas, we can blit + // directly to the destintion canvas one row per SCALE supersampled rows. + int start_y = y >> SHIFT; + int stop_y = (y + height) >> SHIFT; + int count = stop_y - start_y; + if (count > 0) { + y += count << SHIFT; + height -= count << SHIFT; + + // save original X for our tail blitH() loop at the bottom + int origX = x; + + x -= fSuperLeft; + // hack, until I figure out why my cubics (I think) go beyond the bounds + if (x < 0) { + width += x; + x = 0; + } + + // There is always a left column, a middle, and a right column. + // ileft is the destination x of the first pixel of the entire rect. + // xleft is (SCALE - # of covered supersampled pixels) in that + // destination pixel. + int ileft = x >> SHIFT; + int xleft = x & MASK; + // irite is the destination x of the last pixel of the OPAQUE section. + // xrite is the number of supersampled pixels extending beyond irite; + // xrite/SCALE should give us alpha. + int irite = (x + width) >> SHIFT; + int xrite = (x + width) & MASK; + if (!xrite) { + xrite = SCALE; + irite--; + } + + // Need to call flush() to clean up pending draws before we + // even consider blitV(), since otherwise it can look nonmonotonic. + SkASSERT(start_y > fCurrIY); + this->flush(); + + int n = irite - ileft - 1; + if (n < 0) { + // If n < 0, we'll only have a single partially-transparent column + // of pixels to render. + xleft = xrite - xleft; + SkASSERT(xleft <= SCALE); + SkASSERT(xleft > 0); + fRealBlitter->blitV(ileft + fLeft, start_y, count, + coverage_to_exact_alpha(xleft)); + } else { + // With n = 0, we have two possibly-transparent columns of pixels + // to render; with n > 0, we have opaque columns between them. + + xleft = SCALE - xleft; + + // Using coverage_to_exact_alpha is not consistent with blitH() + const int coverageL = coverage_to_exact_alpha(xleft); + const int coverageR = coverage_to_exact_alpha(xrite); + + SkASSERT(coverageL > 0 || n > 0 || coverageR > 0); + SkASSERT((coverageL != 0) + n + (coverageR != 0) <= fWidth); + + fRealBlitter->blitAntiRect(ileft + fLeft, start_y, n, count, + coverageL, coverageR); + } + + // preamble for our next call to blitH() + fCurrIY = stop_y - 1; + fOffsetX = 0; + fCurrY = y - 1; + fRuns.reset(fWidth); + x = origX; + } + + // catch any remaining few rows + SkASSERT(height <= MASK); + while (--height >= 0) { + this->blitH(x, y++, width); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +/// Masked supersampling antialiased blitter. +class MaskSuperBlitter : public BaseSuperBlitter { +public: + MaskSuperBlitter(SkBlitter* realBlitter, const SkIRect& ir, const SkIRect&, bool isInverse); + ~MaskSuperBlitter() override { + fRealBlitter->blitMask(fMask, fClipRect); + } + + void blitH(int x, int y, int width) override; + + static bool CanHandleRect(const SkIRect& bounds) { +#ifdef FORCE_RLE + return false; +#endif + int width = bounds.width(); + int64_t rb = SkAlign4(width); + // use 64bits to detect overflow + int64_t storage = rb * bounds.height(); + + return (width <= MaskSuperBlitter::kMAX_WIDTH) && + (storage <= MaskSuperBlitter::kMAX_STORAGE); + } + +private: + enum { +#ifdef FORCE_SUPERMASK + kMAX_WIDTH = 2048, + kMAX_STORAGE = 1024 * 1024 * 2 +#else + kMAX_WIDTH = 32, // so we don't try to do very wide things, where the RLE blitter would be faster + kMAX_STORAGE = 1024 +#endif + }; + + SkMask fMask; + SkIRect fClipRect; + // we add 1 because add_aa_span can write (unchanged) 1 extra byte at the end, rather than + // perform a test to see if stopAlpha != 0 + uint32_t fStorage[(kMAX_STORAGE >> 2) + 1]; +}; + +MaskSuperBlitter::MaskSuperBlitter(SkBlitter* realBlitter, const SkIRect& ir, + const SkIRect& clipBounds, bool isInverse) + : BaseSuperBlitter(realBlitter, ir, clipBounds, isInverse) +{ + SkASSERT(CanHandleRect(ir)); + SkASSERT(!isInverse); + + fMask.fImage = (uint8_t*)fStorage; + fMask.fBounds = ir; + fMask.fRowBytes = ir.width(); + fMask.fFormat = SkMask::kA8_Format; + + fClipRect = ir; + if (!fClipRect.intersect(clipBounds)) { + SkASSERT(0); + fClipRect.setEmpty(); + } + + // For valgrind, write 1 extra byte at the end so we don't read + // uninitialized memory. See comment in add_aa_span and fStorage[]. + memset(fStorage, 0, fMask.fBounds.height() * fMask.fRowBytes + 1); +} + +static void add_aa_span(uint8_t* alpha, U8CPU startAlpha) { + /* I should be able to just add alpha[x] + startAlpha. + However, if the trailing edge of the previous span and the leading + edge of the current span round to the same super-sampled x value, + I might overflow to 256 with this add, hence the funny subtract. + */ + unsigned tmp = *alpha + startAlpha; + SkASSERT(tmp <= 256); + *alpha = SkToU8(tmp - (tmp >> 8)); +} + +static inline uint32_t quadplicate_byte(U8CPU value) { + uint32_t pair = (value << 8) | value; + return (pair << 16) | pair; +} + +// Perform this tricky subtract, to avoid overflowing to 256. Our caller should +// only ever call us with at most enough to hit 256 (never larger), so it is +// enough to just subtract the high-bit. Actually clamping with a branch would +// be slower (e.g. if (tmp > 255) tmp = 255;) +// +static inline void saturated_add(uint8_t* ptr, U8CPU add) { + unsigned tmp = *ptr + add; + SkASSERT(tmp <= 256); + *ptr = SkToU8(tmp - (tmp >> 8)); +} + +// minimum count before we want to setup an inner loop, adding 4-at-a-time +#define MIN_COUNT_FOR_QUAD_LOOP 16 + +static void add_aa_span(uint8_t* alpha, U8CPU startAlpha, int middleCount, + U8CPU stopAlpha, U8CPU maxValue) { + SkASSERT(middleCount >= 0); + + saturated_add(alpha, startAlpha); + alpha += 1; + + if (middleCount >= MIN_COUNT_FOR_QUAD_LOOP) { + // loop until we're quad-byte aligned + while (reinterpret_cast(alpha) & 0x3) { + alpha[0] = SkToU8(alpha[0] + maxValue); + alpha += 1; + middleCount -= 1; + } + + int bigCount = middleCount >> 2; + uint32_t* qptr = reinterpret_cast(alpha); + uint32_t qval = quadplicate_byte(maxValue); + do { + *qptr++ += qval; + } while (--bigCount > 0); + + middleCount &= 3; + alpha = reinterpret_cast (qptr); + // fall through to the following while-loop + } + + while (--middleCount >= 0) { + alpha[0] = SkToU8(alpha[0] + maxValue); + alpha += 1; + } + + // potentially this can be off the end of our "legal" alpha values, but that + // only happens if stopAlpha is also 0. Rather than test for stopAlpha != 0 + // every time (slow), we just do it, and ensure that we've allocated extra space + // (see the + 1 comment in fStorage[] + saturated_add(alpha, stopAlpha); +} + +void MaskSuperBlitter::blitH(int x, int y, int width) { + int iy = (y >> SHIFT); + + SkASSERT(iy >= fMask.fBounds.fTop && iy < fMask.fBounds.fBottom); + iy -= fMask.fBounds.fTop; // make it relative to 0 + + // This should never happen, but it does. Until the true cause is + // discovered, let's skip this span instead of crashing. + // See http://crbug.com/17569. + if (iy < 0) { + return; + } + +#ifdef SK_DEBUG + { + int ix = x >> SHIFT; + SkASSERT(ix >= fMask.fBounds.fLeft && ix < fMask.fBounds.fRight); + } +#endif + + x -= SkLeftShift(fMask.fBounds.fLeft, SHIFT); + + // hack, until I figure out why my cubics (I think) go beyond the bounds + if (x < 0) { + width += x; + x = 0; + } + + uint8_t* row = fMask.fImage + iy * fMask.fRowBytes + (x >> SHIFT); + + int start = x; + int stop = x + width; + + SkASSERT(start >= 0 && stop > start); + int fb = start & MASK; + int fe = stop & MASK; + int n = (stop >> SHIFT) - (start >> SHIFT) - 1; + + + if (n < 0) { + SkASSERT(row >= fMask.fImage); + SkASSERT(row < fMask.fImage + kMAX_STORAGE + 1); + add_aa_span(row, coverage_to_partial_alpha(fe - fb)); + } else { + fb = SCALE - fb; + SkASSERT(row >= fMask.fImage); + SkASSERT(row + n + 1 < fMask.fImage + kMAX_STORAGE + 1); + add_aa_span(row, coverage_to_partial_alpha(fb), + n, coverage_to_partial_alpha(fe), + (1 << (8 - SHIFT)) - (((y & MASK) + 1) >> SHIFT)); + } + +#ifdef SK_DEBUG + fCurrX = x + width; +#endif +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkScan::SAAFillPath(const SkPath& path, SkBlitter* blitter, const SkIRect& ir, + const SkIRect& clipBounds, bool forceRLE) { + bool containedInClip = clipBounds.contains(ir); + bool isInverse = path.isInverseFillType(); + + // MaskSuperBlitter can't handle drawing outside of ir, so we can't use it + // if we're an inverse filltype + if (!isInverse && MaskSuperBlitter::CanHandleRect(ir) && !forceRLE) { + MaskSuperBlitter superBlit(blitter, ir, clipBounds, isInverse); + SkASSERT(SkIntToScalar(ir.fTop) <= path.getBounds().fTop); + sk_fill_path(path, clipBounds, &superBlit, ir.fTop, ir.fBottom, SHIFT, containedInClip); + } else { + SuperBlitter superBlit(blitter, ir, clipBounds, isInverse); + sk_fill_path(path, clipBounds, &superBlit, ir.fTop, ir.fBottom, SHIFT, containedInClip); + } +} + +#endif // defined(SK_FORCE_AAA) diff --git a/gfx/skia/skia/src/core/SkSharedMutex.cpp b/gfx/skia/skia/src/core/SkSharedMutex.cpp new file mode 100644 index 0000000000..f2c62966cd --- /dev/null +++ b/gfx/skia/skia/src/core/SkSharedMutex.cpp @@ -0,0 +1,368 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkSharedMutex.h" + +#include "include/core/SkTypes.h" +#include "include/private/base/SkSemaphore.h" + +#include + +#if !defined(__has_feature) + #define __has_feature(x) 0 +#endif + +#if __has_feature(thread_sanitizer) + + /* Report that a lock has been created at address "lock". */ + #define ANNOTATE_RWLOCK_CREATE(lock) \ + AnnotateRWLockCreate(__FILE__, __LINE__, lock) + + /* Report that the lock at address "lock" is about to be destroyed. */ + #define ANNOTATE_RWLOCK_DESTROY(lock) \ + AnnotateRWLockDestroy(__FILE__, __LINE__, lock) + + /* Report that the lock at address "lock" has been acquired. + is_w=1 for writer lock, is_w=0 for reader lock. */ + #define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) \ + AnnotateRWLockAcquired(__FILE__, __LINE__, lock, is_w) + + /* Report that the lock at address "lock" is about to be released. */ + #define ANNOTATE_RWLOCK_RELEASED(lock, is_w) \ + AnnotateRWLockReleased(__FILE__, __LINE__, lock, is_w) + + #if defined(DYNAMIC_ANNOTATIONS_WANT_ATTRIBUTE_WEAK) + #if defined(__GNUC__) + #define DYNAMIC_ANNOTATIONS_ATTRIBUTE_WEAK __attribute__((weak)) + #else + /* TODO(glider): for Windows support we may want to change this macro in order + to prepend __declspec(selectany) to the annotations' declarations. */ + #error weak annotations are not supported for your compiler + #endif + #else + #define DYNAMIC_ANNOTATIONS_ATTRIBUTE_WEAK + #endif + +#ifdef __GNUC__ +#pragma GCC visibility push(default) +#endif + + extern "C" { + void AnnotateRWLockCreate( + const char *file, int line, + const volatile void *lock) DYNAMIC_ANNOTATIONS_ATTRIBUTE_WEAK; + void AnnotateRWLockDestroy( + const char *file, int line, + const volatile void *lock) DYNAMIC_ANNOTATIONS_ATTRIBUTE_WEAK; + void AnnotateRWLockAcquired( + const char *file, int line, + const volatile void *lock, long is_w) DYNAMIC_ANNOTATIONS_ATTRIBUTE_WEAK; + void AnnotateRWLockReleased( + const char *file, int line, + const volatile void *lock, long is_w) DYNAMIC_ANNOTATIONS_ATTRIBUTE_WEAK; + } + +#ifdef __GNUC__ +#pragma GCC visibility pop +#endif + +#else + + #define ANNOTATE_RWLOCK_CREATE(lock) + #define ANNOTATE_RWLOCK_DESTROY(lock) + #define ANNOTATE_RWLOCK_ACQUIRED(lock, is_w) + #define ANNOTATE_RWLOCK_RELEASED(lock, is_w) + +#endif + +#ifdef SK_DEBUG + + #include "include/private/base/SkTDArray.h" + #include "include/private/base/SkThreadID.h" + + class SkSharedMutex::ThreadIDSet { + public: + // Returns true if threadID is in the set. + bool find(SkThreadID threadID) const { + for (auto& t : fThreadIDs) { + if (t == threadID) return true; + } + return false; + } + + // Returns true if did not already exist. + bool tryAdd(SkThreadID threadID) { + for (auto& t : fThreadIDs) { + if (t == threadID) return false; + } + fThreadIDs.append(1, &threadID); + return true; + } + // Returns true if already exists in Set. + bool tryRemove(SkThreadID threadID) { + for (int i = 0; i < fThreadIDs.size(); ++i) { + if (fThreadIDs[i] == threadID) { + fThreadIDs.remove(i); + return true; + } + } + return false; + } + + void swap(ThreadIDSet& other) { + fThreadIDs.swap(other.fThreadIDs); + } + + int count() const { + return fThreadIDs.size(); + } + + private: + SkTDArray fThreadIDs; + }; + + SkSharedMutex::SkSharedMutex() + : fCurrentShared(new ThreadIDSet) + , fWaitingExclusive(new ThreadIDSet) + , fWaitingShared(new ThreadIDSet){ + ANNOTATE_RWLOCK_CREATE(this); + } + + SkSharedMutex::~SkSharedMutex() { ANNOTATE_RWLOCK_DESTROY(this); } + + void SkSharedMutex::acquire() { + SkThreadID threadID(SkGetThreadID()); + int currentSharedCount; + int waitingExclusiveCount; + { + SkAutoMutexExclusive l(fMu); + + SkASSERTF(!fCurrentShared->find(threadID), + "Thread %" PRIx64 " already has an shared lock\n", threadID); + + if (!fWaitingExclusive->tryAdd(threadID)) { + SkDEBUGFAILF("Thread %" PRIx64 " already has an exclusive lock\n", threadID); + } + + currentSharedCount = fCurrentShared->count(); + waitingExclusiveCount = fWaitingExclusive->count(); + } + + if (currentSharedCount > 0 || waitingExclusiveCount > 1) { + fExclusiveQueue.wait(); + } + + ANNOTATE_RWLOCK_ACQUIRED(this, 1); + } + + // Implementation Detail: + // The shared threads need two separate queues to keep the threads that were added after the + // exclusive lock separate from the threads added before. + void SkSharedMutex::release() { + ANNOTATE_RWLOCK_RELEASED(this, 1); + SkThreadID threadID(SkGetThreadID()); + int sharedWaitingCount; + int exclusiveWaitingCount; + int sharedQueueSelect; + { + SkAutoMutexExclusive l(fMu); + SkASSERT(0 == fCurrentShared->count()); + if (!fWaitingExclusive->tryRemove(threadID)) { + SkDEBUGFAILF("Thread %" PRIx64 " did not have the lock held.\n", threadID); + } + exclusiveWaitingCount = fWaitingExclusive->count(); + sharedWaitingCount = fWaitingShared->count(); + fWaitingShared.swap(fCurrentShared); + sharedQueueSelect = fSharedQueueSelect; + if (sharedWaitingCount > 0) { + fSharedQueueSelect = 1 - fSharedQueueSelect; + } + } + + if (sharedWaitingCount > 0) { + fSharedQueue[sharedQueueSelect].signal(sharedWaitingCount); + } else if (exclusiveWaitingCount > 0) { + fExclusiveQueue.signal(); + } + } + + void SkSharedMutex::assertHeld() const { + SkThreadID threadID(SkGetThreadID()); + SkAutoMutexExclusive l(fMu); + SkASSERT(0 == fCurrentShared->count()); + SkASSERT(fWaitingExclusive->find(threadID)); + } + + void SkSharedMutex::acquireShared() { + SkThreadID threadID(SkGetThreadID()); + int exclusiveWaitingCount; + int sharedQueueSelect; + { + SkAutoMutexExclusive l(fMu); + exclusiveWaitingCount = fWaitingExclusive->count(); + if (exclusiveWaitingCount > 0) { + if (!fWaitingShared->tryAdd(threadID)) { + SkDEBUGFAILF("Thread %" PRIx64 " was already waiting!\n", threadID); + } + } else { + if (!fCurrentShared->tryAdd(threadID)) { + SkDEBUGFAILF("Thread %" PRIx64 " already holds a shared lock!\n", threadID); + } + } + sharedQueueSelect = fSharedQueueSelect; + } + + if (exclusiveWaitingCount > 0) { + fSharedQueue[sharedQueueSelect].wait(); + } + + ANNOTATE_RWLOCK_ACQUIRED(this, 0); + } + + void SkSharedMutex::releaseShared() { + ANNOTATE_RWLOCK_RELEASED(this, 0); + SkThreadID threadID(SkGetThreadID()); + + int currentSharedCount; + int waitingExclusiveCount; + { + SkAutoMutexExclusive l(fMu); + if (!fCurrentShared->tryRemove(threadID)) { + SkDEBUGFAILF("Thread %" PRIx64 " does not hold a shared lock.\n", threadID); + } + currentSharedCount = fCurrentShared->count(); + waitingExclusiveCount = fWaitingExclusive->count(); + } + + if (0 == currentSharedCount && waitingExclusiveCount > 0) { + fExclusiveQueue.signal(); + } + } + + void SkSharedMutex::assertHeldShared() const { + SkThreadID threadID(SkGetThreadID()); + SkAutoMutexExclusive l(fMu); + SkASSERT(fCurrentShared->find(threadID)); + } + +#else + + // The fQueueCounts fields holds many counts in an int32_t in order to make managing them atomic. + // These three counts must be the same size, so each gets 10 bits. The 10 bits represent + // the log of the count which is 1024. + // + // The three counts held in fQueueCounts are: + // * Shared - the number of shared lock holders currently running. + // * WaitingExclusive - the number of threads waiting for an exclusive lock. + // * WaitingShared - the number of threads waiting to run while waiting for an exclusive thread + // to finish. + static const int kLogThreadCount = 10; + + enum { + kSharedOffset = (0 * kLogThreadCount), + kWaitingExlusiveOffset = (1 * kLogThreadCount), + kWaitingSharedOffset = (2 * kLogThreadCount), + kSharedMask = ((1 << kLogThreadCount) - 1) << kSharedOffset, + kWaitingExclusiveMask = ((1 << kLogThreadCount) - 1) << kWaitingExlusiveOffset, + kWaitingSharedMask = ((1 << kLogThreadCount) - 1) << kWaitingSharedOffset, + }; + + SkSharedMutex::SkSharedMutex() : fQueueCounts(0) { ANNOTATE_RWLOCK_CREATE(this); } + SkSharedMutex::~SkSharedMutex() { ANNOTATE_RWLOCK_DESTROY(this); } + void SkSharedMutex::acquire() { + // Increment the count of exclusive queue waiters. + int32_t oldQueueCounts = fQueueCounts.fetch_add(1 << kWaitingExlusiveOffset, + std::memory_order_acquire); + + // If there are no other exclusive waiters and no shared threads are running then run + // else wait. + if ((oldQueueCounts & kWaitingExclusiveMask) > 0 || (oldQueueCounts & kSharedMask) > 0) { + fExclusiveQueue.wait(); + } + ANNOTATE_RWLOCK_ACQUIRED(this, 1); + } + + void SkSharedMutex::release() { + ANNOTATE_RWLOCK_RELEASED(this, 1); + + int32_t oldQueueCounts = fQueueCounts.load(std::memory_order_relaxed); + int32_t waitingShared; + int32_t newQueueCounts; + do { + newQueueCounts = oldQueueCounts; + + // Decrement exclusive waiters. + newQueueCounts -= 1 << kWaitingExlusiveOffset; + + // The number of threads waiting to acquire a shared lock. + waitingShared = (oldQueueCounts & kWaitingSharedMask) >> kWaitingSharedOffset; + + // If there are any move the counts of all the shared waiters to actual shared. They are + // going to run next. + if (waitingShared > 0) { + + // Set waiting shared to zero. + newQueueCounts &= ~kWaitingSharedMask; + + // Because this is the exclusive release, then there are zero readers. So, the bits + // for shared locks should be zero. Since those bits are zero, we can just |= in the + // waitingShared count instead of clearing with an &= and then |= the count. + newQueueCounts |= waitingShared << kSharedOffset; + } + + } while (!fQueueCounts.compare_exchange_strong(oldQueueCounts, newQueueCounts, + std::memory_order_release, + std::memory_order_relaxed)); + + if (waitingShared > 0) { + // Run all the shared. + fSharedQueue.signal(waitingShared); + } else if ((newQueueCounts & kWaitingExclusiveMask) > 0) { + // Run a single exclusive waiter. + fExclusiveQueue.signal(); + } + } + + void SkSharedMutex::acquireShared() { + int32_t oldQueueCounts = fQueueCounts.load(std::memory_order_relaxed); + int32_t newQueueCounts; + do { + newQueueCounts = oldQueueCounts; + // If there are waiting exclusives then this shared lock waits else it runs. + if ((newQueueCounts & kWaitingExclusiveMask) > 0) { + newQueueCounts += 1 << kWaitingSharedOffset; + } else { + newQueueCounts += 1 << kSharedOffset; + } + } while (!fQueueCounts.compare_exchange_strong(oldQueueCounts, newQueueCounts, + std::memory_order_acquire, + std::memory_order_relaxed)); + + // If there are waiting exclusives, then this shared waits until after it runs. + if ((newQueueCounts & kWaitingExclusiveMask) > 0) { + fSharedQueue.wait(); + } + ANNOTATE_RWLOCK_ACQUIRED(this, 0); + + } + + void SkSharedMutex::releaseShared() { + ANNOTATE_RWLOCK_RELEASED(this, 0); + + // Decrement the shared count. + int32_t oldQueueCounts = fQueueCounts.fetch_sub(1 << kSharedOffset, + std::memory_order_release); + + // If shared count is going to zero (because the old count == 1) and there are exclusive + // waiters, then run a single exclusive waiter. + if (((oldQueueCounts & kSharedMask) >> kSharedOffset) == 1 + && (oldQueueCounts & kWaitingExclusiveMask) > 0) { + fExclusiveQueue.signal(); + } + } + +#endif diff --git a/gfx/skia/skia/src/core/SkSharedMutex.h b/gfx/skia/skia/src/core/SkSharedMutex.h new file mode 100644 index 0000000000..e3c3047aa5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSharedMutex.h @@ -0,0 +1,102 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSharedLock_DEFINED +#define SkSharedLock_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkSemaphore.h" +#include "include/private/base/SkThreadAnnotations.h" +#include + +#ifdef SK_DEBUG + #include "include/private/base/SkMutex.h" + #include +#endif // SK_DEBUG + +// There are two shared lock implementations one debug the other is high performance. They implement +// an interface similar to pthread's rwlocks. +// This is a shared lock implementation similar to pthreads rwlocks. The high performance +// implementation is cribbed from Preshing's article: +// http://preshing.com/20150316/semaphores-are-surprisingly-versatile/ +// +// This lock does not obey strict queue ordering. It will always alternate between readers and +// a single writer. +class SK_CAPABILITY("mutex") SkSharedMutex { +public: + SkSharedMutex(); + ~SkSharedMutex(); + // Acquire lock for exclusive use. + void acquire() SK_ACQUIRE(); + + // Release lock for exclusive use. + void release() SK_RELEASE_CAPABILITY(); + + // Fail if exclusive is not held. + void assertHeld() const SK_ASSERT_CAPABILITY(this); + + // Acquire lock for shared use. + void acquireShared() SK_ACQUIRE_SHARED(); + + // Release lock for shared use. + void releaseShared() SK_RELEASE_SHARED_CAPABILITY(); + + // Fail if shared lock not held. + void assertHeldShared() const SK_ASSERT_SHARED_CAPABILITY(this); + +private: +#ifdef SK_DEBUG + class ThreadIDSet; + std::unique_ptr fCurrentShared; + std::unique_ptr fWaitingExclusive; + std::unique_ptr fWaitingShared; + int fSharedQueueSelect{0}; + mutable SkMutex fMu; + SkSemaphore fSharedQueue[2]; + SkSemaphore fExclusiveQueue; +#else + std::atomic fQueueCounts; + SkSemaphore fSharedQueue; + SkSemaphore fExclusiveQueue; +#endif // SK_DEBUG +}; + +#ifndef SK_DEBUG +inline void SkSharedMutex::assertHeld() const {} +inline void SkSharedMutex::assertHeldShared() const {} +#endif // SK_DEBUG + +class SK_SCOPED_CAPABILITY SkAutoSharedMutexExclusive { +public: + explicit SkAutoSharedMutexExclusive(SkSharedMutex& lock) SK_ACQUIRE(lock) + : fLock(lock) { + lock.acquire(); + } + ~SkAutoSharedMutexExclusive() SK_RELEASE_CAPABILITY() { fLock.release(); } + +private: + SkSharedMutex& fLock; +}; + +class SK_SCOPED_CAPABILITY SkAutoSharedMutexShared { +public: + explicit SkAutoSharedMutexShared(SkSharedMutex& lock) SK_ACQUIRE_SHARED(lock) + : fLock(lock) { + lock.acquireShared(); + } + + // You would think this should be SK_RELEASE_SHARED_CAPABILITY, but SK_SCOPED_CAPABILITY + // doesn't fully understand the difference between shared and exclusive. + // Please review https://reviews.llvm.org/D52578 for more information. + ~SkAutoSharedMutexShared() SK_RELEASE_CAPABILITY() { fLock.releaseShared(); } + +private: + SkSharedMutex& fLock; +}; + +#endif // SkSharedLock_DEFINED diff --git a/gfx/skia/skia/src/core/SkSpecialImage.cpp b/gfx/skia/skia/src/core/SkSpecialImage.cpp new file mode 100644 index 0000000000..2cf9a51939 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSpecialImage.cpp @@ -0,0 +1,458 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file + */ + +#include "src/core/SkSpecialImage.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkImage.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTileMode.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkSurfacePriv.h" +#include "src/image/SkImage_Base.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/image/SkImage_Gpu.h" +#include "src/shaders/SkImageShader.h" +#endif + +// Currently, the raster imagefilters can only handle certain imageinfos. Call this to know if +// a given info is supported. +static bool valid_for_imagefilters(const SkImageInfo& info) { + // no support for other swizzles/depths yet + return info.colorType() == kN32_SkColorType; +} + +SkSpecialImage::SkSpecialImage(const SkIRect& subset, + uint32_t uniqueID, + const SkColorInfo& colorInfo, + const SkSurfaceProps& props) + : fSubset(subset) + , fUniqueID(kNeedNewImageUniqueID_SpecialImage == uniqueID ? SkNextID::ImageID() : uniqueID) + , fColorInfo(colorInfo) + , fProps(props) { +} + +sk_sp SkSpecialImage::makeSurface(SkColorType colorType, + const SkColorSpace* colorSpace, + const SkISize& size, + SkAlphaType at, + const SkSurfaceProps& props) const { + return this->onMakeSurface(colorType, colorSpace, size, at, props); +} + +sk_sp SkSpecialImage::makeTightSurface(SkColorType colorType, + const SkColorSpace* colorSpace, + const SkISize& size, + SkAlphaType at) const { + return this->onMakeTightSurface(colorType, colorSpace, size, at); +} + +sk_sp SkSpecialImage::asImage(const SkIRect* subset) const { + if (subset) { + SkIRect absolute = subset->makeOffset(this->subset().topLeft()); + return this->onAsImage(&absolute); + } else { + return this->onAsImage(nullptr); + } +} + +sk_sp SkSpecialImage::asShader(SkTileMode tileMode, + const SkSamplingOptions& sampling, + const SkMatrix& lm) const { + return this->onAsShader(tileMode, sampling, lm); +} + +sk_sp SkSpecialImage::asShader(const SkSamplingOptions& sampling) const { + return this->asShader(sampling, SkMatrix::I()); +} + +sk_sp SkSpecialImage::asShader(const SkSamplingOptions& sampling, + const SkMatrix& lm) const { + return this->asShader(SkTileMode::kClamp, sampling, lm); +} + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/TextureProxyView.h" + +bool SkSpecialImage::isGraphiteBacked() const { + return SkToBool(this->textureProxyView()); +} + +skgpu::graphite::TextureProxyView SkSpecialImage::textureProxyView() const { + return this->onTextureProxyView(); +} + +skgpu::graphite::TextureProxyView SkSpecialImage::onTextureProxyView() const { + // To get here we would need to be trying to retrieve a Graphite-backed resource from + // either a raster or Ganesh-backed special image. That should never happen. + // TODO: re-enable this assert. Right now, since image filters can fallback to raster + // in Graphite, we can get here. + //SkASSERT(false); + return {}; +} +#endif + +#ifdef SK_DEBUG +bool SkSpecialImage::RectFits(const SkIRect& rect, int width, int height) { + if (0 == width && 0 == height) { + SkASSERT(0 == rect.fLeft && 0 == rect.fRight && 0 == rect.fTop && 0 == rect.fBottom); + return true; + } + + return rect.fLeft >= 0 && rect.fLeft < width && rect.fLeft < rect.fRight && + rect.fRight >= 0 && rect.fRight <= width && + rect.fTop >= 0 && rect.fTop < height && rect.fTop < rect.fBottom && + rect.fBottom >= 0 && rect.fBottom <= height; +} +#endif + +sk_sp SkSpecialImage::MakeFromImage(GrRecordingContext* rContext, + const SkIRect& subset, + sk_sp image, + const SkSurfaceProps& props) { + SkASSERT(RectFits(subset, image->width(), image->height())); + +#if defined(SK_GANESH) + if (rContext) { + auto [view, ct] = as_IB(image)->asView(rContext, GrMipmapped::kNo); + return MakeDeferredFromGpu(rContext, + subset, + image->uniqueID(), + std::move(view), + { ct, image->alphaType(), image->refColorSpace() }, + props); + } +#endif + + // raster to gpu is supported here, but gpu to raster is not + SkBitmap bm; + if (as_IB(image)->getROPixels(nullptr, &bm)) { + return MakeFromRaster(subset, bm, props); + } + return nullptr; +} + +/////////////////////////////////////////////////////////////////////////////// + +class SkSpecialImage_Raster final : public SkSpecialImage { +public: + SkSpecialImage_Raster(const SkIRect& subset, const SkBitmap& bm, const SkSurfaceProps& props) + : SkSpecialImage(subset, bm.getGenerationID(), bm.info().colorInfo(), props) + , fBitmap(bm) { + SkASSERT(bm.pixelRef()); + SkASSERT(fBitmap.getPixels()); + } + + size_t getSize() const override { return fBitmap.computeByteSize(); } + + void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkSamplingOptions& sampling, + const SkPaint* paint) const override { + SkRect dst = SkRect::MakeXYWH(x, y, + this->subset().width(), this->subset().height()); + + canvas->drawImageRect(fBitmap.asImage(), SkRect::Make(this->subset()), dst, + sampling, paint, SkCanvas::kStrict_SrcRectConstraint); + } + + bool onGetROPixels(SkBitmap* bm) const override { + return fBitmap.extractSubset(bm, this->subset()); + } + +#if defined(SK_GANESH) + GrSurfaceProxyView onView(GrRecordingContext* context) const override { + if (context) { + return std::get<0>(GrMakeCachedBitmapProxyView( + context, fBitmap, /*label=*/"SpecialImageRaster_OnView", GrMipmapped::kNo)); + } + + return {}; + } +#endif + + sk_sp onMakeSurface(SkColorType colorType, const SkColorSpace* colorSpace, + const SkISize& size, SkAlphaType at, + const SkSurfaceProps& props) const override { + // Ignore the requested color type, the raster backend currently only supports N32 + colorType = kN32_SkColorType; // TODO: find ways to allow f16 + SkImageInfo info = SkImageInfo::Make(size, colorType, at, sk_ref_sp(colorSpace)); + return SkSpecialSurface::MakeRaster(info, props); + } + + sk_sp onMakeSubset(const SkIRect& subset) const override { + // No need to extract subset, onGetROPixels handles that when needed + return SkSpecialImage::MakeFromRaster(subset, fBitmap, this->props()); + } + + sk_sp onAsImage(const SkIRect* subset) const override { + if (subset) { + SkBitmap subsetBM; + + if (!fBitmap.extractSubset(&subsetBM, *subset)) { + return nullptr; + } + + return subsetBM.asImage(); + } + + return fBitmap.asImage(); + } + + sk_sp onAsShader(SkTileMode tileMode, + const SkSamplingOptions& sampling, + const SkMatrix& lm) const override { + // TODO(skbug.com/12784): SkImage::makeShader() doesn't support a subset yet, but SkBitmap + // supports subset views so create the shader from the subset bitmap instead of fBitmap. + SkBitmap subsetBM; + if (!this->getROPixels(&subsetBM)) { + return nullptr; + } + return subsetBM.asImage()->makeShader(tileMode, tileMode, sampling, lm); + } + + sk_sp onMakeTightSurface(SkColorType colorType, const SkColorSpace* colorSpace, + const SkISize& size, SkAlphaType at) const override { + // Ignore the requested color type, the raster backend currently only supports N32 + colorType = kN32_SkColorType; // TODO: find ways to allow f16 + SkImageInfo info = SkImageInfo::Make(size, colorType, at, sk_ref_sp(colorSpace)); + return SkSurface::MakeRaster(info); + } + +private: + SkBitmap fBitmap; +}; + +sk_sp SkSpecialImage::MakeFromRaster(const SkIRect& subset, + const SkBitmap& bm, + const SkSurfaceProps& props) { + SkASSERT(RectFits(subset, bm.width(), bm.height())); + + if (!bm.pixelRef()) { + return nullptr; + } + + const SkBitmap* srcBM = &bm; + SkBitmap tmp; + // ImageFilters only handle N32 at the moment, so force our src to be that + if (!valid_for_imagefilters(bm.info())) { + if (!tmp.tryAllocPixels(bm.info().makeColorType(kN32_SkColorType)) || + !bm.readPixels(tmp.info(), tmp.getPixels(), tmp.rowBytes(), 0, 0)) + { + return nullptr; + } + srcBM = &tmp; + } + return sk_make_sp(subset, *srcBM, props); +} + +sk_sp SkSpecialImage::CopyFromRaster(const SkIRect& subset, + const SkBitmap& bm, + const SkSurfaceProps& props) { + SkASSERT(RectFits(subset, bm.width(), bm.height())); + + if (!bm.pixelRef()) { + return nullptr; + } + + SkBitmap tmp; + SkImageInfo info = bm.info().makeDimensions(subset.size()); + // As in MakeFromRaster, must force src to N32 for ImageFilters + if (!valid_for_imagefilters(bm.info())) { + info = info.makeColorType(kN32_SkColorType); + } + if (!tmp.tryAllocPixels(info)) { + return nullptr; + } + if (!bm.readPixels(tmp.info(), tmp.getPixels(), tmp.rowBytes(), subset.x(), subset.y())) { + return nullptr; + } + + // Since we're making a copy of the raster, the resulting special image is the exact size + // of the requested subset of the original and no longer needs to be offset by subset's left + // and top, since those were relative to the original's buffer. + return sk_make_sp( + SkIRect::MakeWH(subset.width(), subset.height()), tmp, props); +} + +#if defined(SK_GANESH) +/////////////////////////////////////////////////////////////////////////////// +static sk_sp wrap_proxy_in_image(GrRecordingContext* context, + GrSurfaceProxyView view, + const SkColorInfo& colorInfo) { + + return sk_make_sp(sk_ref_sp(context), + kNeedNewImageUniqueID, + std::move(view), + colorInfo); +} + +class SkSpecialImage_Gpu final : public SkSpecialImage { +public: + SkSpecialImage_Gpu(GrRecordingContext* context, + const SkIRect& subset, + uint32_t uniqueID, + GrSurfaceProxyView view, + const SkColorInfo& colorInfo, + const SkSurfaceProps& props) + : SkSpecialImage(subset, uniqueID, colorInfo, props) + , fContext(context) + , fView(std::move(view)) { + } + + size_t getSize() const override { + return fView.proxy()->gpuMemorySize(); + } + + void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkSamplingOptions& sampling, + const SkPaint* paint) const override { + SkRect dst = SkRect::MakeXYWH(x, y, + this->subset().width(), this->subset().height()); + + // TODO: In this instance we know we're going to draw a sub-portion of the backing + // texture into the canvas so it is okay to wrap it in an SkImage. This poses + // some problems for full deferral however in that when the deferred SkImage_Gpu + // instantiates itself it is going to have to either be okay with having a larger + // than expected backing texture (unlikely) or the 'fit' of the SurfaceProxy needs + // to be tightened (if it is deferred). + sk_sp img = sk_sp( + new SkImage_Gpu(sk_ref_sp(canvas->recordingContext()), + this->uniqueID(), + fView, + this->colorInfo())); + + canvas->drawImageRect(img, SkRect::Make(this->subset()), dst, + sampling, paint, SkCanvas::kStrict_SrcRectConstraint); + } + + GrRecordingContext* onGetContext() const override { return fContext; } + + GrSurfaceProxyView onView(GrRecordingContext* context) const override { return fView; } + + bool onGetROPixels(SkBitmap* dst) const override { + // This should never be called: All GPU image filters are implemented entirely on the GPU, + // so we never perform read-back. + SkASSERT(false); + return false; + } + + sk_sp onMakeSurface(SkColorType colorType, const SkColorSpace* colorSpace, + const SkISize& size, SkAlphaType at, + const SkSurfaceProps& props) const override { + if (!fContext) { + return nullptr; + } + + SkImageInfo ii = SkImageInfo::Make(size, colorType, at, sk_ref_sp(colorSpace)); + + return SkSpecialSurface::MakeRenderTarget(fContext, ii, props, fView.origin()); + } + + sk_sp onMakeSubset(const SkIRect& subset) const override { + return SkSpecialImage::MakeDeferredFromGpu(fContext, + subset, + this->uniqueID(), + fView, + this->colorInfo(), + this->props()); + } + + sk_sp onAsImage(const SkIRect* subset) const override { + GrSurfaceProxy* proxy = fView.proxy(); + if (subset) { + if (proxy->isFunctionallyExact() && *subset == SkIRect::MakeSize(proxy->dimensions())) { + proxy->priv().exactify(false); + // The existing GrTexture is already tight so reuse it in the SkImage + return wrap_proxy_in_image(fContext, fView, this->colorInfo()); + } + + auto subsetView = GrSurfaceProxyView::Copy(fContext, + fView, + GrMipmapped::kNo, + *subset, + SkBackingFit::kExact, + skgpu::Budgeted::kYes, + /*label=*/"SkSpecialImage_AsImage"); + if (!subsetView) { + return nullptr; + } + SkASSERT(subsetView.asTextureProxy()); + SkASSERT(subsetView.proxy()->priv().isExact()); + + // MDB: this is acceptable (wrapping subsetProxy in an SkImage) bc Copy will + // return a kExact-backed proxy + return wrap_proxy_in_image(fContext, std::move(subsetView), this->colorInfo()); + } + + proxy->priv().exactify(true); + + return wrap_proxy_in_image(fContext, fView, this->colorInfo()); + } + + sk_sp onAsShader(SkTileMode tileMode, + const SkSamplingOptions& sampling, + const SkMatrix& lm) const override { + // The special image's logical (0,0) is at its subset's topLeft() so we need to account for + // that in the local matrix used when sampling. + SkMatrix subsetOrigin = SkMatrix::Translate(-this->subset().topLeft()); + subsetOrigin.postConcat(lm); + // However, we don't need to modify the subset itself since that is defined with respect to + // the base image, and the local matrix is applied before any tiling/clamping. + const SkRect subset = SkRect::Make(this->subset()); + + // asImage() w/o a subset makes no copy; create the SkImageShader directly to remember the + // subset used to access the image. + return SkImageShader::MakeSubset( + this->asImage(), subset, tileMode, tileMode, sampling, &subsetOrigin); + } + + sk_sp onMakeTightSurface(SkColorType colorType, const SkColorSpace* colorSpace, + const SkISize& size, SkAlphaType at) const override { + // TODO (michaelludwig): Why does this ignore colorType but onMakeSurface doesn't ignore it? + // Once makeTightSurface() goes away, should this type overriding behavior be moved into + // onMakeSurface() or is this unnecessary? + colorType = colorSpace && colorSpace->gammaIsLinear() + ? kRGBA_F16_SkColorType : kRGBA_8888_SkColorType; + SkImageInfo info = SkImageInfo::Make(size, colorType, at, sk_ref_sp(colorSpace)); + return SkSurface::MakeRenderTarget( + fContext, skgpu::Budgeted::kYes, info, 0, fView.origin(), nullptr); + } + +private: + GrRecordingContext* fContext; + GrSurfaceProxyView fView; +}; + +sk_sp SkSpecialImage::MakeDeferredFromGpu(GrRecordingContext* context, + const SkIRect& subset, + uint32_t uniqueID, + GrSurfaceProxyView view, + const GrColorInfo& colorInfo, + const SkSurfaceProps& props) { + if (!context || context->abandoned() || !view.asTextureProxy()) { + return nullptr; + } + + SkColorType ct = GrColorTypeToSkColorType(colorInfo.colorType()); + + SkASSERT(RectFits(subset, view.proxy()->width(), view.proxy()->height())); + return sk_make_sp(context, subset, uniqueID, std::move(view), + SkColorInfo(ct, + colorInfo.alphaType(), + colorInfo.refColorSpace()), + props); +} +#endif diff --git a/gfx/skia/skia/src/core/SkSpecialImage.h b/gfx/skia/skia/src/core/SkSpecialImage.h new file mode 100644 index 0000000000..33bcfae2df --- /dev/null +++ b/gfx/skia/skia/src/core/SkSpecialImage.h @@ -0,0 +1,263 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file + */ + +#ifndef SkSpecialImage_DEFINED +#define SkSpecialImage_DEFINED + +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkSurfaceProps.h" +#include "src/core/SkNextID.h" + +#if defined(SK_GANESH) +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#endif + +class GrColorInfo; +class GrRecordingContext; +class GrTextureProxy; +class SkBitmap; +class SkCanvas; +class SkImage; +struct SkImageInfo; +class SkMatrix; +class SkPaint; +class SkPixmap; +class SkShader; +class SkSpecialSurface; +class SkSurface; +enum class SkTileMode; + +namespace skgpu::graphite { +class Recorder; +class TextureProxyView; +} + +enum { + kNeedNewImageUniqueID_SpecialImage = 0 +}; + +/** + * This is a restricted form of SkImage solely intended for internal use. It + * differs from SkImage in that: + * - it can only be backed by raster or gpu (no generators) + * - it can be backed by a GrTextureProxy larger than its nominal bounds + * - it can't be drawn tiled + * - it can't be drawn with MIPMAPs + * It is similar to SkImage in that it abstracts how the pixels are stored/represented. + * + * Note: the contents of the backing storage outside of the subset rect are undefined. + */ +class SkSpecialImage : public SkRefCnt { +public: + typedef void* ReleaseContext; + typedef void(*RasterReleaseProc)(void* pixels, ReleaseContext); + + const SkSurfaceProps& props() const { return fProps; } + + int width() const { return fSubset.width(); } + int height() const { return fSubset.height(); } + SkISize dimensions() const { return { this->width(), this->height() }; } + const SkIRect& subset() const { return fSubset; } + + uint32_t uniqueID() const { return fUniqueID; } + + virtual size_t getSize() const = 0; + + const SkColorInfo& colorInfo() const { return fColorInfo; } + SkAlphaType alphaType() const { return fColorInfo.alphaType(); } + SkColorType colorType() const { return fColorInfo.colorType(); } + SkColorSpace* getColorSpace() const { return fColorInfo.colorSpace(); } + + /** + * Draw this SpecialImage into the canvas, automatically taking into account the image's subset + */ + void draw(SkCanvas* canvas, + SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, + const SkPaint* paint) const { + return this->onDraw(canvas, x, y, sampling, paint); + } + void draw(SkCanvas* canvas, SkScalar x, SkScalar y) const { + this->draw(canvas, x, y, SkSamplingOptions(), nullptr); + } + + static sk_sp MakeFromImage(GrRecordingContext*, + const SkIRect& subset, + sk_sp, + const SkSurfaceProps&); + static sk_sp MakeFromRaster(const SkIRect& subset, + const SkBitmap&, + const SkSurfaceProps&); + static sk_sp CopyFromRaster(const SkIRect& subset, + const SkBitmap&, + const SkSurfaceProps&); +#if defined(SK_GANESH) + static sk_sp MakeDeferredFromGpu(GrRecordingContext*, + const SkIRect& subset, + uint32_t uniqueID, + GrSurfaceProxyView, + const GrColorInfo&, + const SkSurfaceProps&); +#endif + +#if defined(SK_GRAPHITE) + static sk_sp MakeGraphite(skgpu::graphite::Recorder*, + const SkIRect& subset, + uint32_t uniqueID, + skgpu::graphite::TextureProxyView, + const SkColorInfo&, + const SkSurfaceProps&); +#endif + + /** + * Create a new special surface with a backend that is compatible with this special image. + */ + sk_sp makeSurface(SkColorType, + const SkColorSpace*, + const SkISize& size, + SkAlphaType, + const SkSurfaceProps&) const; + + /** + * Create a new surface with a backend that is compatible with this special image. + * TODO: switch this to makeSurface once we resolved the naming issue + * TODO (michaelludwig) - This is only used by SkTileImageFilter, which appears should be + * updated to work correctly with subsets and then makeTightSurface() can go away entirely. + */ + sk_sp makeTightSurface(SkColorType, + const SkColorSpace*, + const SkISize& size, + SkAlphaType = kPremul_SkAlphaType) const; + + /** + * Extract a subset of this special image and return it as a special image. + * It may or may not point to the same backing memory. The input 'subset' is relative to the + * special image's content rect. + */ + sk_sp makeSubset(const SkIRect& subset) const { + SkIRect absolute = subset.makeOffset(this->subset().topLeft()); + return this->onMakeSubset(absolute); + } + + /** + * Create an SkImage from the contents of this special image optionally extracting a subset. + * It may or may not point to the same backing memory. + * Note: when no 'subset' parameter is specified the the entire SkSpecialImage will be + * returned - including whatever extra padding may have resulted from a loose fit! + * When the 'subset' parameter is specified the returned image will be tight even if that + * entails a copy! The 'subset' is relative to this special image's content rect. + */ + // TODO: The only version that uses the subset is the tile image filter, and that doesn't need + // to if it can be rewritten to use asShader() and SkTileModes. Similarly, the only use case of + // asImage() w/o a subset is SkImage::makeFiltered() and that could/should return an SkShader so + // that users don't need to worry about correctly applying the subset, etc. + sk_sp asImage(const SkIRect* subset = nullptr) const; + + /** + * Create an SkShader that samples the contents of this special image, applying tile mode for + * any sample that falls outside its internal subset. + */ + sk_sp asShader(SkTileMode, const SkSamplingOptions&, const SkMatrix& lm) const; + sk_sp asShader(const SkSamplingOptions& sampling) const; + sk_sp asShader(const SkSamplingOptions& sampling, const SkMatrix& lm) const; + + /** + * If the SpecialImage is backed by a gpu texture, return true. + */ + bool isTextureBacked() const { return SkToBool(this->onGetContext()); } + + /** + * Return the GrRecordingContext if the SkSpecialImage is GrTexture-backed + */ + GrRecordingContext* getContext() const { return this->onGetContext(); } + +#if defined(SK_GANESH) + /** + * Regardless of how the underlying backing data is stored, returns the contents as a + * GrSurfaceProxyView. The returned view's proxy represents the entire backing image, so texture + * coordinates must be mapped from the content rect (e.g. relative to 'subset()') to the proxy's + * space (offset by subset().topLeft()). + */ + GrSurfaceProxyView view(GrRecordingContext* context) const { return this->onView(context); } +#endif + +#if defined(SK_GRAPHITE) + bool isGraphiteBacked() const; + + skgpu::graphite::TextureProxyView textureProxyView() const; +#endif + + /** + * Regardless of the underlying backing store, return the contents as an SkBitmap. + * The returned bitmap represents the subset accessed by this image, thus (0,0) refers to the + * top-left corner of 'subset'. + */ + bool getROPixels(SkBitmap* bm) const { + return this->onGetROPixels(bm); + } + +protected: + SkSpecialImage(const SkIRect& subset, + uint32_t uniqueID, + const SkColorInfo&, + const SkSurfaceProps&); + + virtual void onDraw(SkCanvas*, + SkScalar x, SkScalar y, + const SkSamplingOptions&, + const SkPaint*) const = 0; + + virtual bool onGetROPixels(SkBitmap*) const = 0; + + virtual GrRecordingContext* onGetContext() const { return nullptr; } + +#if defined(SK_GANESH) + virtual GrSurfaceProxyView onView(GrRecordingContext*) const = 0; +#endif + +#if defined(SK_GRAPHITE) + virtual skgpu::graphite::TextureProxyView onTextureProxyView() const; +#endif + + // This subset is relative to the backing store's coordinate frame, it has already been mapped + // from the content rect by the non-virtual makeSubset(). + virtual sk_sp onMakeSubset(const SkIRect& subset) const = 0; + + virtual sk_sp onMakeSurface(SkColorType colorType, + const SkColorSpace* colorSpace, + const SkISize& size, + SkAlphaType at, + const SkSurfaceProps&) const = 0; + + // This subset (when not null) is relative to the backing store's coordinate frame, it has + // already been mapped from the content rect by the non-virtual asImage(). + virtual sk_sp onAsImage(const SkIRect* subset) const = 0; + + virtual sk_sp onAsShader(SkTileMode, + const SkSamplingOptions&, + const SkMatrix&) const = 0; + + virtual sk_sp onMakeTightSurface(SkColorType colorType, + const SkColorSpace* colorSpace, + const SkISize& size, + SkAlphaType at) const = 0; + +#ifdef SK_DEBUG + static bool RectFits(const SkIRect& rect, int width, int height); +#endif + +private: + const SkIRect fSubset; + const uint32_t fUniqueID; + const SkColorInfo fColorInfo; + const SkSurfaceProps fProps; +}; + +#endif // SkSpecialImage_DEFINED diff --git a/gfx/skia/skia/src/core/SkSpecialSurface.cpp b/gfx/skia/skia/src/core/SkSpecialSurface.cpp new file mode 100644 index 0000000000..b90935b5aa --- /dev/null +++ b/gfx/skia/skia/src/core/SkSpecialSurface.cpp @@ -0,0 +1,138 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file + */ + +#include "src/core/SkSpecialSurface.h" + +#include + +#include "include/core/SkCanvas.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkMallocPixelRef.h" +#include "src/core/SkBitmapDevice.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkDevice.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSurfacePriv.h" + +SkSpecialSurface::SkSpecialSurface(sk_sp device, const SkIRect& subset) + : fSubset(subset) { + SkASSERT(fSubset.width() > 0); + SkASSERT(fSubset.height() > 0); + + fCanvas = std::make_unique(std::move(device)); + fCanvas->clipRect(SkRect::Make(subset)); +#ifdef SK_IS_BOT + fCanvas->clear(SK_ColorRED); // catch any imageFilter sloppiness +#endif +} + +sk_sp SkSpecialSurface::makeImageSnapshot() { + fCanvas->restoreToCount(0); + + // Because of the above 'restoreToCount(0)' we know we're getting the base device here. + SkBaseDevice* baseDevice = SkCanvasPriv::TopDevice(fCanvas.get()); + if (!baseDevice) { + return nullptr; + } + + sk_sp image = baseDevice->snapSpecial(this->subset()); + + fCanvas.reset(); + return image; +} + +/////////////////////////////////////////////////////////////////////////////// +sk_sp SkSpecialSurface::MakeRaster(const SkImageInfo& info, + const SkSurfaceProps& props) { + if (!SkSurfaceValidateRasterInfo(info)) { + return nullptr; + } + + sk_sp pr = SkMallocPixelRef::MakeAllocate(info, 0); + if (!pr) { + return nullptr; + } + + SkBitmap bitmap; + bitmap.setInfo(info, info.minRowBytes()); + bitmap.setPixelRef(std::move(pr), 0, 0); + + sk_sp device(new SkBitmapDevice(bitmap, + { props.flags(), kUnknown_SkPixelGeometry })); + if (!device) { + return nullptr; + } + + const SkIRect subset = SkIRect::MakeSize(info.dimensions()); + + return sk_make_sp(std::move(device), subset); +} + +/////////////////////////////////////////////////////////////////////////////// +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" + +sk_sp SkSpecialSurface::MakeRenderTarget(GrRecordingContext* rContext, + const SkImageInfo& ii, + const SkSurfaceProps& props, + GrSurfaceOrigin surfaceOrigin) { + if (!rContext) { + return nullptr; + } + + auto device = rContext->priv().createDevice(skgpu::Budgeted::kYes, + ii, + SkBackingFit::kApprox, + 1, + GrMipmapped::kNo, + GrProtected::kNo, + surfaceOrigin, + {props.flags(), kUnknown_SkPixelGeometry}, + skgpu::ganesh::Device::InitContents::kUninit); + if (!device) { + return nullptr; + } + + const SkIRect subset = SkIRect::MakeSize(ii.dimensions()); + + return sk_make_sp(std::move(device), subset); +} + +#endif // defined(SK_GANESH) + +/////////////////////////////////////////////////////////////////////////////// +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Device.h" + +sk_sp SkSpecialSurface::MakeGraphite(skgpu::graphite::Recorder* recorder, + const SkImageInfo& ii, + const SkSurfaceProps& props) { + using namespace skgpu::graphite; + + if (!recorder) { + return nullptr; + } + + sk_sp device = Device::Make(recorder, + ii, + skgpu::Budgeted::kYes, + skgpu::Mipmapped::kNo, + {props.flags(), kUnknown_SkPixelGeometry}, + /* addInitialClear= */ false); + if (!device) { + return nullptr; + } + + const SkIRect subset = SkIRect::MakeSize(ii.dimensions()); + + return sk_make_sp(std::move(device), subset); +} + +#endif // SK_GRAPHITE diff --git a/gfx/skia/skia/src/core/SkSpecialSurface.h b/gfx/skia/skia/src/core/SkSpecialSurface.h new file mode 100644 index 0000000000..4c33008940 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSpecialSurface.h @@ -0,0 +1,101 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file + */ + +#ifndef SkSpecialSurface_DEFINED +#define SkSpecialSurface_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSurfaceProps.h" + +#if defined(SK_GANESH) +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#endif + +#if defined(SK_GRAPHITE) +namespace skgpu::graphite { + class Recorder; +} +#endif + +class GrBackendFormat; +class GrRecordingContext; +class SkBaseDevice; +class SkBitmap; +class SkCanvas; +class SkSpecialImage; + +/** + * SkSpecialSurface is a restricted form of SkSurface solely for internal use. It differs + * from SkSurface in that: + * - it can be backed by GrTextures larger than [ fWidth, fHeight ] + * - it can't be used for tiling + * - it becomes inactive once a snapshot of it is taken (i.e., no copy-on-write) + * - it has no generation ID + */ +class SkSpecialSurface : public SkRefCnt { +public: + SkSpecialSurface(sk_sp, const SkIRect& subset); + +#ifdef SK_DEBUG + SkSurfaceProps props() const { return fCanvas->getBaseProps(); } +#endif + + const SkIRect& subset() const { return fSubset; } + int width() const { return fSubset.width(); } + int height() const { return fSubset.height(); } + + /** + * Return a canvas that will draw into this special surface. This will always + * return the same canvas for a given special surface, and is managed/owned by the + * special surface. + * + * The canvas will be invalid after 'makeImageSnapshot' is called. + */ + SkCanvas* getCanvas() { return fCanvas.get(); } + + /** + * Returns an image of the current state of the surface pixels up to this + * point. The canvas returned by 'getCanvas' becomes invalidated by this + * call and no more drawing to this surface is allowed. + */ + sk_sp makeImageSnapshot(); + +#if defined(SK_GANESH) + /** + * Allocate a new GPU-backed SkSpecialSurface. If the requested surface cannot + * be created, nullptr will be returned. + */ + static sk_sp MakeRenderTarget(GrRecordingContext*, + const SkImageInfo&, + const SkSurfaceProps&, + GrSurfaceOrigin); +#endif + +#if defined(SK_GRAPHITE) + static sk_sp MakeGraphite(skgpu::graphite::Recorder*, + const SkImageInfo&, + const SkSurfaceProps&); +#endif + + /** + * Return a new CPU-backed surface, with the memory for the pixels automatically + * allocated. + * + * If the requested surface cannot be created, or the request is not a + * supported configuration, nullptr will be returned. + */ + static sk_sp MakeRaster(const SkImageInfo&, + const SkSurfaceProps&); + +private: + std::unique_ptr fCanvas; + const SkIRect fSubset; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkSpinlock.cpp b/gfx/skia/skia/src/core/SkSpinlock.cpp new file mode 100644 index 0000000000..ece314ad2e --- /dev/null +++ b/gfx/skia/skia/src/core/SkSpinlock.cpp @@ -0,0 +1,50 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkSpinlock.h" +#include "include/private/base/SkThreadAnnotations.h" + +#if 0 + #include "include/private/base/SkMutex.h" + #include + #include + + static void debug_trace() { + void* stack[64]; + int len = backtrace(stack, std::size(stack)); + + // As you might imagine, we can't use an SkSpinlock here... + static SkMutex lock; + { + SkAutoMutexExclusive locked(lock); + fprintf(stderr, "\n"); + backtrace_symbols_fd(stack, len, 2/*stderr*/); + fprintf(stderr, "\n"); + } + } +#else + static void debug_trace() {} +#endif + +// Renamed from "pause" to avoid conflict with function defined in unistd.h +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #include + static void do_pause() { _mm_pause(); } +#else + static void do_pause() { /*spin*/ } +#endif + +void SkSpinlock::contendedAcquire() { + debug_trace(); + + // To act as a mutex, we need an acquire barrier when we acquire the lock. + SK_POTENTIALLY_BLOCKING_REGION_BEGIN; + while (fLocked.exchange(true, std::memory_order_acquire)) { + do_pause(); + } + SK_POTENTIALLY_BLOCKING_REGION_END; +} diff --git a/gfx/skia/skia/src/core/SkSpriteBlitter.h b/gfx/skia/skia/src/core/SkSpriteBlitter.h new file mode 100644 index 0000000000..dfb1194488 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSpriteBlitter.h @@ -0,0 +1,47 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSpriteBlitter_DEFINED +#define SkSpriteBlitter_DEFINED + +#include "include/core/SkPixmap.h" +#include "include/core/SkShader.h" +#include "src/core/SkBlitter.h" + +class SkPaint; + +// SkSpriteBlitter specializes SkBlitter in a way to move large rectangles of pixels around. +// Because of this use, the main primitive shifts from blitH style things to the more efficient +// blitRect. +class SkSpriteBlitter : public SkBlitter { +public: + SkSpriteBlitter(const SkPixmap& source); + + virtual bool setup(const SkPixmap& dst, int left, int top, const SkPaint&); + + // blitH, blitAntiH, blitV and blitMask should not be called on an SkSpriteBlitter. + void blitH(int x, int y, int width) override; + void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override; + void blitV(int x, int y, int height, SkAlpha alpha) override; + void blitMask(const SkMask&, const SkIRect& clip) override; + + // A SkSpriteBlitter must implement blitRect. + void blitRect(int x, int y, int width, int height) override = 0; + + static SkSpriteBlitter* ChooseL32(const SkPixmap& source, const SkPaint&, SkArenaAlloc*); + +protected: + SkPixmap fDst; + const SkPixmap fSource; + int fLeft, fTop; + const SkPaint* fPaint; + +private: + using INHERITED = SkBlitter; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkSpriteBlitter_ARGB32.cpp b/gfx/skia/skia/src/core/SkSpriteBlitter_ARGB32.cpp new file mode 100644 index 0000000000..1314fafdf0 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSpriteBlitter_ARGB32.cpp @@ -0,0 +1,120 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColorFilter.h" +#include "include/core/SkPaint.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlitRow.h" +#include "src/core/SkSpriteBlitter.h" +#include "src/core/SkXfermodePriv.h" + +/////////////////////////////////////////////////////////////////////////////// + +class Sprite_D32_S32 : public SkSpriteBlitter { +public: + Sprite_D32_S32(const SkPixmap& src, U8CPU alpha) : INHERITED(src) { + SkASSERT(src.colorType() == kN32_SkColorType); + + unsigned flags32 = 0; + if (255 != alpha) { + flags32 |= SkBlitRow::kGlobalAlpha_Flag32; + } + if (!src.isOpaque()) { + flags32 |= SkBlitRow::kSrcPixelAlpha_Flag32; + } + + fProc32 = SkBlitRow::Factory32(flags32); + fAlpha = alpha; + } + + void blitRect(int x, int y, int width, int height) override { + SkASSERT(width > 0 && height > 0); + uint32_t* SK_RESTRICT dst = fDst.writable_addr32(x, y); + const uint32_t* SK_RESTRICT src = fSource.addr32(x - fLeft, y - fTop); + size_t dstRB = fDst.rowBytes(); + size_t srcRB = fSource.rowBytes(); + SkBlitRow::Proc32 proc = fProc32; + U8CPU alpha = fAlpha; + + do { + proc(dst, src, width, alpha); + dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB); + src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB); + } while (--height != 0); + } + +private: + SkBlitRow::Proc32 fProc32; + U8CPU fAlpha; + + using INHERITED = SkSpriteBlitter; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class Sprite_D32_S32A_Xfer: public SkSpriteBlitter { +public: + Sprite_D32_S32A_Xfer(const SkPixmap& source, const SkPaint& paint) : SkSpriteBlitter(source) { + fXfermode = SkXfermode::Peek(paint.getBlendMode_or(SkBlendMode::kSrcOver)); + SkASSERT(fXfermode); + } + + void blitRect(int x, int y, int width, int height) override { + SkASSERT(width > 0 && height > 0); + uint32_t* SK_RESTRICT dst = fDst.writable_addr32(x, y); + const uint32_t* SK_RESTRICT src = fSource.addr32(x - fLeft, y - fTop); + size_t dstRB = fDst.rowBytes(); + size_t srcRB = fSource.rowBytes(); + SkXfermode* xfermode = fXfermode; + + do { + xfermode->xfer32(dst, src, width, nullptr); + + dst = (uint32_t* SK_RESTRICT)((char*)dst + dstRB); + src = (const uint32_t* SK_RESTRICT)((const char*)src + srcRB); + } while (--height != 0); + } + +protected: + SkXfermode* fXfermode; + +private: + using INHERITED = SkSpriteBlitter; +}; + +/////////////////////////////////////////////////////////////////////////////// + +SkSpriteBlitter* SkSpriteBlitter::ChooseL32(const SkPixmap& source, const SkPaint& paint, + SkArenaAlloc* allocator) { + SkASSERT(allocator != nullptr); + + if (paint.getColorFilter() != nullptr) { + return nullptr; + } + if (paint.getMaskFilter() != nullptr) { + return nullptr; + } + if (!paint.asBlendMode()) { + return nullptr; + } + + U8CPU alpha = paint.getAlpha(); + + if (source.colorType() == kN32_SkColorType) { + if (paint.isSrcOver()) { + // this can handle alpha, but not xfermode + return allocator->make(source, alpha); + } + if (255 == alpha) { + // this can handle an xfermode, but not alpha + return allocator->make(source, paint); + } + } + return nullptr; +} diff --git a/gfx/skia/skia/src/core/SkStream.cpp b/gfx/skia/skia/src/core/SkStream.cpp new file mode 100644 index 0000000000..e43cb7716c --- /dev/null +++ b/gfx/skia/skia/src/core/SkStream.cpp @@ -0,0 +1,986 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" + +#include "include/core/SkData.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkOSFile.h" +#include "src/core/SkStreamPriv.h" + +#include +#include +#include +#include +#include + +/////////////////////////////////////////////////////////////////////////////// + +bool SkStream::readS8(int8_t* i) { + return this->read(i, sizeof(*i)) == sizeof(*i); +} + +bool SkStream::readS16(int16_t* i) { + return this->read(i, sizeof(*i)) == sizeof(*i); +} + +bool SkStream::readS32(int32_t* i) { + return this->read(i, sizeof(*i)) == sizeof(*i); +} + +bool SkStream::readScalar(SkScalar* i) { + return this->read(i, sizeof(*i)) == sizeof(*i); +} + +#define SK_MAX_BYTE_FOR_U8 0xFD +#define SK_BYTE_SENTINEL_FOR_U16 0xFE +#define SK_BYTE_SENTINEL_FOR_U32 0xFF + +bool SkStream::readPackedUInt(size_t* i) { + uint8_t byte; + if (!this->read(&byte, 1)) { + return false; + } + if (SK_BYTE_SENTINEL_FOR_U16 == byte) { + uint16_t i16; + if (!this->readU16(&i16)) { return false; } + *i = i16; + } else if (SK_BYTE_SENTINEL_FOR_U32 == byte) { + uint32_t i32; + if (!this->readU32(&i32)) { return false; } + *i = i32; + } else { + *i = byte; + } + return true; +} + +////////////////////////////////////////////////////////////////////////////////////// + +SkWStream::~SkWStream() +{ +} + +void SkWStream::flush() +{ +} + +bool SkWStream::writeDecAsText(int32_t dec) +{ + char buffer[kSkStrAppendS32_MaxSize]; + char* stop = SkStrAppendS32(buffer, dec); + return this->write(buffer, stop - buffer); +} + +bool SkWStream::writeBigDecAsText(int64_t dec, int minDigits) +{ + char buffer[kSkStrAppendU64_MaxSize]; + char* stop = SkStrAppendU64(buffer, dec, minDigits); + return this->write(buffer, stop - buffer); +} + +bool SkWStream::writeHexAsText(uint32_t hex, int digits) +{ + SkString tmp; + tmp.appendHex(hex, digits); + return this->write(tmp.c_str(), tmp.size()); +} + +bool SkWStream::writeScalarAsText(SkScalar value) +{ + char buffer[kSkStrAppendScalar_MaxSize]; + char* stop = SkStrAppendScalar(buffer, value); + return this->write(buffer, stop - buffer); +} + +bool SkWStream::writeScalar(SkScalar value) { + return this->write(&value, sizeof(value)); +} + +int SkWStream::SizeOfPackedUInt(size_t value) { + if (value <= SK_MAX_BYTE_FOR_U8) { + return 1; + } else if (value <= 0xFFFF) { + return 3; + } + return 5; +} + +bool SkWStream::writePackedUInt(size_t value) { + uint8_t data[5]; + size_t len = 1; + if (value <= SK_MAX_BYTE_FOR_U8) { + data[0] = value; + len = 1; + } else if (value <= 0xFFFF) { + uint16_t value16 = value; + data[0] = SK_BYTE_SENTINEL_FOR_U16; + memcpy(&data[1], &value16, 2); + len = 3; + } else { + uint32_t value32 = SkToU32(value); + data[0] = SK_BYTE_SENTINEL_FOR_U32; + memcpy(&data[1], &value32, 4); + len = 5; + } + return this->write(data, len); +} + +bool SkWStream::writeStream(SkStream* stream, size_t length) { + char scratch[1024]; + const size_t MAX = sizeof(scratch); + + while (length != 0) { + size_t n = length; + if (n > MAX) { + n = MAX; + } + stream->read(scratch, n); + if (!this->write(scratch, n)) { + return false; + } + length -= n; + } + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +SkFILEStream::SkFILEStream(std::shared_ptr file, size_t end, size_t start, size_t current) + : fFILE(std::move(file)) + , fEnd(end) + , fStart(std::min(start, fEnd)) + , fCurrent(SkTPin(current, fStart, fEnd)) +{ + SkASSERT(fStart == start); + SkASSERT(fCurrent == current); +} + +SkFILEStream::SkFILEStream(std::shared_ptr file, size_t end, size_t start) + : SkFILEStream(std::move(file), end, start, start) +{ } + +SkFILEStream::SkFILEStream(FILE* file, size_t size, size_t start) + : SkFILEStream(std::shared_ptr(file, sk_fclose), SkSafeMath::Add(start, size), start) +{ } + +SkFILEStream::SkFILEStream(FILE* file, size_t size) + : SkFILEStream(file, size, file ? sk_ftell(file) : 0) +{ } + +SkFILEStream::SkFILEStream(FILE* file) + : SkFILEStream(std::shared_ptr(file, sk_fclose), + file ? sk_fgetsize(file) : 0, + file ? sk_ftell(file) : 0) +{ } + +SkFILEStream::SkFILEStream(const char path[]) + : SkFILEStream(path ? sk_fopen(path, kRead_SkFILE_Flag) : nullptr) +{ } + +SkFILEStream::~SkFILEStream() { + this->close(); +} + +void SkFILEStream::close() { + fFILE.reset(); + fEnd = 0; + fStart = 0; + fCurrent = 0; +} + +size_t SkFILEStream::read(void* buffer, size_t size) { + if (size > fEnd - fCurrent) { + size = fEnd - fCurrent; + } + size_t bytesRead = size; + if (buffer) { + bytesRead = sk_qread(fFILE.get(), buffer, size, fCurrent); + } + if (bytesRead == SIZE_MAX) { + return 0; + } + fCurrent += bytesRead; + return bytesRead; +} + +bool SkFILEStream::isAtEnd() const { + if (fCurrent == fEnd) { + return true; + } + return fCurrent >= sk_fgetsize(fFILE.get()); +} + +bool SkFILEStream::rewind() { + fCurrent = fStart; + return true; +} + +SkStreamAsset* SkFILEStream::onDuplicate() const { + return new SkFILEStream(fFILE, fEnd, fStart, fStart); +} + +size_t SkFILEStream::getPosition() const { + SkASSERT(fCurrent >= fStart); + return fCurrent - fStart; +} + +bool SkFILEStream::seek(size_t position) { + fCurrent = std::min(SkSafeMath::Add(position, fStart), fEnd); + return true; +} + +bool SkFILEStream::move(long offset) { + if (offset < 0) { + if (offset == std::numeric_limits::min() || + !SkTFitsIn(-offset) || + (size_t) (-offset) >= this->getPosition()) + { + fCurrent = fStart; + } else { + fCurrent += offset; + } + } else if (!SkTFitsIn(offset)) { + fCurrent = fEnd; + } else { + fCurrent = std::min(SkSafeMath::Add(fCurrent, (size_t) offset), fEnd); + } + + SkASSERT(fCurrent >= fStart && fCurrent <= fEnd); + return true; +} + +SkStreamAsset* SkFILEStream::onFork() const { + return new SkFILEStream(fFILE, fEnd, fStart, fCurrent); +} + +size_t SkFILEStream::getLength() const { + return fEnd - fStart; +} + +/////////////////////////////////////////////////////////////////////////////// + +static sk_sp newFromParams(const void* src, size_t size, bool copyData) { + if (copyData) { + return SkData::MakeWithCopy(src, size); + } else { + return SkData::MakeWithoutCopy(src, size); + } +} + +SkMemoryStream::SkMemoryStream() { + fData = SkData::MakeEmpty(); + fOffset = 0; +} + +SkMemoryStream::SkMemoryStream(size_t size) { + fData = SkData::MakeUninitialized(size); + fOffset = 0; +} + +SkMemoryStream::SkMemoryStream(const void* src, size_t size, bool copyData) { + fData = newFromParams(src, size, copyData); + fOffset = 0; +} + +SkMemoryStream::SkMemoryStream(sk_sp data) : fData(std::move(data)) { + if (nullptr == fData) { + fData = SkData::MakeEmpty(); + } + fOffset = 0; +} + +std::unique_ptr SkMemoryStream::MakeCopy(const void* data, size_t length) { + return std::make_unique(data, length, true); +} + +std::unique_ptr SkMemoryStream::MakeDirect(const void* data, size_t length) { + return std::make_unique(data, length, false); +} + +std::unique_ptr SkMemoryStream::Make(sk_sp data) { + return std::make_unique(std::move(data)); +} + +void SkMemoryStream::setMemoryOwned(const void* src, size_t size) { + fData = SkData::MakeFromMalloc(src, size); + fOffset = 0; +} + +void SkMemoryStream::setMemory(const void* src, size_t size, bool copyData) { + fData = newFromParams(src, size, copyData); + fOffset = 0; +} + +void SkMemoryStream::setData(sk_sp data) { + if (nullptr == data) { + fData = SkData::MakeEmpty(); + } else { + fData = data; + } + fOffset = 0; +} + +void SkMemoryStream::skipToAlign4() { + // cast to remove unary-minus warning + fOffset += -(int)fOffset & 0x03; +} + +size_t SkMemoryStream::read(void* buffer, size_t size) { + size_t dataSize = fData->size(); + + if (size > dataSize - fOffset) { + size = dataSize - fOffset; + } + if (buffer) { + memcpy(buffer, fData->bytes() + fOffset, size); + } + fOffset += size; + return size; +} + +size_t SkMemoryStream::peek(void* buffer, size_t size) const { + SkASSERT(buffer != nullptr); + + const size_t currentOffset = fOffset; + SkMemoryStream* nonConstThis = const_cast(this); + const size_t bytesRead = nonConstThis->read(buffer, size); + nonConstThis->fOffset = currentOffset; + return bytesRead; +} + +bool SkMemoryStream::isAtEnd() const { + return fOffset == fData->size(); +} + +bool SkMemoryStream::rewind() { + fOffset = 0; + return true; +} + +SkMemoryStream* SkMemoryStream::onDuplicate() const { + return new SkMemoryStream(fData); +} + +size_t SkMemoryStream::getPosition() const { + return fOffset; +} + +bool SkMemoryStream::seek(size_t position) { + fOffset = position > fData->size() + ? fData->size() + : position; + return true; +} + +bool SkMemoryStream::move(long offset) { + return this->seek(fOffset + offset); +} + +SkMemoryStream* SkMemoryStream::onFork() const { + std::unique_ptr that(this->duplicate()); + that->seek(fOffset); + return that.release(); +} + +size_t SkMemoryStream::getLength() const { + return fData->size(); +} + +const void* SkMemoryStream::getMemoryBase() { + return fData->data(); +} + +const void* SkMemoryStream::getAtPos() { + return fData->bytes() + fOffset; +} + +///////////////////////////////////////////////////////////////////////////////////////////////////////// +///////////////////////////////////////////////////////////////////////////////////////////////////////// + +SkFILEWStream::SkFILEWStream(const char path[]) +{ + fFILE = sk_fopen(path, kWrite_SkFILE_Flag); +} + +SkFILEWStream::~SkFILEWStream() +{ + if (fFILE) { + sk_fclose(fFILE); + } +} + +size_t SkFILEWStream::bytesWritten() const { + return sk_ftell(fFILE); +} + +bool SkFILEWStream::write(const void* buffer, size_t size) +{ + if (fFILE == nullptr) { + return false; + } + + if (sk_fwrite(buffer, size, fFILE) != size) + { + SkDEBUGCODE(SkDebugf("SkFILEWStream failed writing %zu bytes\n", size);) + sk_fclose(fFILE); + fFILE = nullptr; + return false; + } + return true; +} + +void SkFILEWStream::flush() +{ + if (fFILE) { + sk_fflush(fFILE); + } +} + +void SkFILEWStream::fsync() +{ + flush(); + if (fFILE) { + sk_fsync(fFILE); + } +} + +//////////////////////////////////////////////////////////////////////// + +static inline void sk_memcpy_4bytes(void* dst, const void* src, size_t size) { + if (size == 4) { + memcpy(dst, src, 4); + } else { + memcpy(dst, src, size); + } +} + +#define SkDynamicMemoryWStream_MinBlockSize 4096 + +struct SkDynamicMemoryWStream::Block { + Block* fNext; + char* fCurr; + char* fStop; + + const char* start() const { return (const char*)(this + 1); } + char* start() { return (char*)(this + 1); } + size_t avail() const { return fStop - fCurr; } + size_t written() const { return fCurr - this->start(); } + + void init(size_t size) { + fNext = nullptr; + fCurr = this->start(); + fStop = this->start() + size; + } + + const void* append(const void* data, size_t size) { + SkASSERT((size_t)(fStop - fCurr) >= size); + sk_memcpy_4bytes(fCurr, data, size); + fCurr += size; + return (const void*)((const char*)data + size); + } +}; + +SkDynamicMemoryWStream::SkDynamicMemoryWStream(SkDynamicMemoryWStream&& other) + : fHead(other.fHead) + , fTail(other.fTail) + , fBytesWrittenBeforeTail(other.fBytesWrittenBeforeTail) +{ + other.fHead = nullptr; + other.fTail = nullptr; + other.fBytesWrittenBeforeTail = 0; +} + +SkDynamicMemoryWStream& SkDynamicMemoryWStream::operator=(SkDynamicMemoryWStream&& other) { + if (this != &other) { + this->~SkDynamicMemoryWStream(); + new (this) SkDynamicMemoryWStream(std::move(other)); + } + return *this; +} + +SkDynamicMemoryWStream::~SkDynamicMemoryWStream() { + this->reset(); +} + +void SkDynamicMemoryWStream::reset() { + Block* block = fHead; + while (block != nullptr) { + Block* next = block->fNext; + sk_free(block); + block = next; + } + fHead = fTail = nullptr; + fBytesWrittenBeforeTail = 0; +} + +size_t SkDynamicMemoryWStream::bytesWritten() const { + this->validate(); + + if (fTail) { + return fBytesWrittenBeforeTail + fTail->written(); + } + return 0; +} + +bool SkDynamicMemoryWStream::write(const void* buffer, size_t count) { + if (count > 0) { + SkASSERT(buffer); + size_t size; + + if (fTail) { + if (fTail->avail() > 0) { + size = std::min(fTail->avail(), count); + buffer = fTail->append(buffer, size); + SkASSERT(count >= size); + count -= size; + if (count == 0) { + return true; + } + } + // If we get here, we've just exhausted fTail, so update our tracker + fBytesWrittenBeforeTail += fTail->written(); + } + + size = std::max(count, SkDynamicMemoryWStream_MinBlockSize - sizeof(Block)); + size = SkAlign4(size); // ensure we're always a multiple of 4 (see padToAlign4()) + + Block* block = (Block*)sk_malloc_throw(sizeof(Block) + size); + block->init(size); + block->append(buffer, count); + + if (fTail != nullptr) { + fTail->fNext = block; + } else { + fHead = fTail = block; + } + fTail = block; + this->validate(); + } + return true; +} + +bool SkDynamicMemoryWStream::writeToAndReset(SkDynamicMemoryWStream* dst) { + SkASSERT(dst); + SkASSERT(dst != this); + if (0 == this->bytesWritten()) { + return true; + } + if (0 == dst->bytesWritten()) { + *dst = std::move(*this); + return true; + } + dst->fTail->fNext = fHead; + dst->fBytesWrittenBeforeTail += fBytesWrittenBeforeTail + dst->fTail->written(); + dst->fTail = fTail; + fHead = fTail = nullptr; + fBytesWrittenBeforeTail = 0; + return true; +} + +void SkDynamicMemoryWStream::prependToAndReset(SkDynamicMemoryWStream* dst) { + SkASSERT(dst); + SkASSERT(dst != this); + if (0 == this->bytesWritten()) { + return; + } + if (0 == dst->bytesWritten()) { + *dst = std::move(*this); + return; + } + fTail->fNext = dst->fHead; + dst->fHead = fHead; + dst->fBytesWrittenBeforeTail += fBytesWrittenBeforeTail + fTail->written(); + fHead = fTail = nullptr; + fBytesWrittenBeforeTail = 0; + return; +} + + +bool SkDynamicMemoryWStream::read(void* buffer, size_t offset, size_t count) { + if (offset + count > this->bytesWritten()) { + return false; // test does not partially modify + } + Block* block = fHead; + while (block != nullptr) { + size_t size = block->written(); + if (offset < size) { + size_t part = offset + count > size ? size - offset : count; + memcpy(buffer, block->start() + offset, part); + if (count <= part) { + return true; + } + count -= part; + buffer = (void*) ((char* ) buffer + part); + } + offset = offset > size ? offset - size : 0; + block = block->fNext; + } + return false; +} + +void SkDynamicMemoryWStream::copyTo(void* dst) const { + SkASSERT(dst); + Block* block = fHead; + while (block != nullptr) { + size_t size = block->written(); + memcpy(dst, block->start(), size); + dst = (void*)((char*)dst + size); + block = block->fNext; + } +} + +bool SkDynamicMemoryWStream::writeToStream(SkWStream* dst) const { + SkASSERT(dst); + for (Block* block = fHead; block != nullptr; block = block->fNext) { + if (!dst->write(block->start(), block->written())) { + return false; + } + } + return true; +} + +void SkDynamicMemoryWStream::padToAlign4() { + // The contract is to write zeros until the entire stream has written a multiple of 4 bytes. + // Our Blocks are guaranteed always be (a) full (except the tail) and (b) a multiple of 4 + // so it is sufficient to just examine the tail (if present). + + if (fTail) { + // cast to remove unary-minus warning + int padBytes = -(int)fTail->written() & 0x03; + if (padBytes) { + int zero = 0; + fTail->append(&zero, padBytes); + } + } +} + + +void SkDynamicMemoryWStream::copyToAndReset(void* ptr) { + if (!ptr) { + this->reset(); + return; + } + // By looping through the source and freeing as we copy, we + // can reduce real memory use with large streams. + char* dst = reinterpret_cast(ptr); + Block* block = fHead; + while (block != nullptr) { + size_t len = block->written(); + memcpy(dst, block->start(), len); + dst += len; + Block* next = block->fNext; + sk_free(block); + block = next; + } + fHead = fTail = nullptr; + fBytesWrittenBeforeTail = 0; +} + +bool SkDynamicMemoryWStream::writeToAndReset(SkWStream* dst) { + SkASSERT(dst); + // By looping through the source and freeing as we copy, we + // can reduce real memory use with large streams. + bool dstStreamGood = true; + for (Block* block = fHead; block != nullptr; ) { + if (dstStreamGood && !dst->write(block->start(), block->written())) { + dstStreamGood = false; + } + Block* next = block->fNext; + sk_free(block); + block = next; + } + fHead = fTail = nullptr; + fBytesWrittenBeforeTail = 0; + return dstStreamGood; +} + +sk_sp SkDynamicMemoryWStream::detachAsData() { + const size_t size = this->bytesWritten(); + if (0 == size) { + return SkData::MakeEmpty(); + } + sk_sp data = SkData::MakeUninitialized(size); + this->copyToAndReset(data->writable_data()); + return data; +} + +#ifdef SK_DEBUG +void SkDynamicMemoryWStream::validate() const { + if (!fHead) { + SkASSERT(!fTail); + SkASSERT(fBytesWrittenBeforeTail == 0); + return; + } + SkASSERT(fTail); + + size_t bytes = 0; + const Block* block = fHead; + while (block) { + if (block->fNext) { + bytes += block->written(); + } + block = block->fNext; + } + SkASSERT(bytes == fBytesWrittenBeforeTail); +} +#endif + +//////////////////////////////////////////////////////////////////////////////////////////////// + +class SkBlockMemoryRefCnt : public SkRefCnt { +public: + explicit SkBlockMemoryRefCnt(SkDynamicMemoryWStream::Block* head) : fHead(head) { } + + ~SkBlockMemoryRefCnt() override { + SkDynamicMemoryWStream::Block* block = fHead; + while (block != nullptr) { + SkDynamicMemoryWStream::Block* next = block->fNext; + sk_free(block); + block = next; + } + } + + SkDynamicMemoryWStream::Block* const fHead; +}; + +class SkBlockMemoryStream : public SkStreamAsset { +public: + SkBlockMemoryStream(sk_sp headRef, size_t size) + : fBlockMemory(std::move(headRef)), fCurrent(fBlockMemory->fHead) + , fSize(size) , fOffset(0), fCurrentOffset(0) { } + + size_t read(void* buffer, size_t rawCount) override { + size_t count = rawCount; + if (fOffset + count > fSize) { + count = fSize - fOffset; + } + size_t bytesLeftToRead = count; + while (fCurrent != nullptr) { + size_t bytesLeftInCurrent = fCurrent->written() - fCurrentOffset; + size_t bytesFromCurrent = std::min(bytesLeftToRead, bytesLeftInCurrent); + if (buffer) { + memcpy(buffer, fCurrent->start() + fCurrentOffset, bytesFromCurrent); + buffer = SkTAddOffset(buffer, bytesFromCurrent); + } + if (bytesLeftToRead <= bytesFromCurrent) { + fCurrentOffset += bytesFromCurrent; + fOffset += count; + return count; + } + bytesLeftToRead -= bytesFromCurrent; + fCurrent = fCurrent->fNext; + fCurrentOffset = 0; + } + SkASSERT(false); + return 0; + } + + bool isAtEnd() const override { + return fOffset == fSize; + } + + size_t peek(void* buff, size_t bytesToPeek) const override { + SkASSERT(buff != nullptr); + + bytesToPeek = std::min(bytesToPeek, fSize - fOffset); + + size_t bytesLeftToPeek = bytesToPeek; + char* buffer = static_cast(buff); + const SkDynamicMemoryWStream::Block* current = fCurrent; + size_t currentOffset = fCurrentOffset; + while (bytesLeftToPeek) { + SkASSERT(current); + size_t bytesFromCurrent = std::min(current->written() - currentOffset, bytesLeftToPeek); + memcpy(buffer, current->start() + currentOffset, bytesFromCurrent); + bytesLeftToPeek -= bytesFromCurrent; + buffer += bytesFromCurrent; + current = current->fNext; + currentOffset = 0; + } + return bytesToPeek; + } + + bool rewind() override { + fCurrent = fBlockMemory->fHead; + fOffset = 0; + fCurrentOffset = 0; + return true; + } + + SkBlockMemoryStream* onDuplicate() const override { + return new SkBlockMemoryStream(fBlockMemory, fSize); + } + + size_t getPosition() const override { + return fOffset; + } + + bool seek(size_t position) override { + // If possible, skip forward. + if (position >= fOffset) { + size_t skipAmount = position - fOffset; + return this->skip(skipAmount) == skipAmount; + } + // If possible, move backward within the current block. + size_t moveBackAmount = fOffset - position; + if (moveBackAmount <= fCurrentOffset) { + fCurrentOffset -= moveBackAmount; + fOffset -= moveBackAmount; + return true; + } + // Otherwise rewind and move forward. + return this->rewind() && this->skip(position) == position; + } + + bool move(long offset) override { + return seek(fOffset + offset); + } + + SkBlockMemoryStream* onFork() const override { + SkBlockMemoryStream* that = this->onDuplicate(); + that->fCurrent = this->fCurrent; + that->fOffset = this->fOffset; + that->fCurrentOffset = this->fCurrentOffset; + return that; + } + + size_t getLength() const override { + return fSize; + } + + const void* getMemoryBase() override { + if (fBlockMemory->fHead && !fBlockMemory->fHead->fNext) { + return fBlockMemory->fHead->start(); + } + return nullptr; + } + +private: + sk_sp const fBlockMemory; + SkDynamicMemoryWStream::Block const * fCurrent; + size_t const fSize; + size_t fOffset; + size_t fCurrentOffset; +}; + +std::unique_ptr SkDynamicMemoryWStream::detachAsStream() { + if (nullptr == fHead) { + // no need to reset. + return SkMemoryStream::Make(nullptr); + } + if (fHead == fTail) { // one block, may be worth shrinking. + ptrdiff_t used = fTail->fCurr - (char*)fTail; + fHead = fTail = (SkDynamicMemoryWStream::Block*)sk_realloc_throw(fTail, SkToSizeT(used)); + fTail->fStop = fTail->fCurr = (char*)fTail + used; // Update pointers. + SkASSERT(nullptr == fTail->fNext); + SkASSERT(0 == fBytesWrittenBeforeTail); + } + std::unique_ptr stream + = std::make_unique(sk_make_sp(fHead), + this->bytesWritten()); + fHead = nullptr; // signal reset() to not free anything + this->reset(); + return stream; +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkDebugfStream::write(const void* buffer, size_t size) { + SkDebugf("%.*s", (int)size, (const char*)buffer); + fBytesWritten += size; + return true; +} + +size_t SkDebugfStream::bytesWritten() const { + return fBytesWritten; +} + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// + +static sk_sp mmap_filename(const char path[]) { + FILE* file = sk_fopen(path, kRead_SkFILE_Flag); + if (nullptr == file) { + return nullptr; + } + + auto data = SkData::MakeFromFILE(file); + sk_fclose(file); + return data; +} + +std::unique_ptr SkStream::MakeFromFile(const char path[]) { + auto data(mmap_filename(path)); + if (data) { + return std::make_unique(std::move(data)); + } + + // If we get here, then our attempt at using mmap failed, so try normal file access. + auto stream = std::make_unique(path); + if (!stream->isValid()) { + return nullptr; + } + return std::move(stream); +} + +// Declared in SkStreamPriv.h: +sk_sp SkCopyStreamToData(SkStream* stream) { + SkASSERT(stream != nullptr); + + if (stream->hasLength()) { + return SkData::MakeFromStream(stream, stream->getLength()); + } + + SkDynamicMemoryWStream tempStream; + const size_t bufferSize = 4096; + char buffer[bufferSize]; + do { + size_t bytesRead = stream->read(buffer, bufferSize); + tempStream.write(buffer, bytesRead); + } while (!stream->isAtEnd()); + return tempStream.detachAsData(); +} + +bool SkStreamCopy(SkWStream* out, SkStream* input) { + const char* base = static_cast(input->getMemoryBase()); + if (base && input->hasPosition() && input->hasLength()) { + // Shortcut that avoids the while loop. + size_t position = input->getPosition(); + size_t length = input->getLength(); + SkASSERT(length >= position); + return out->write(&base[position], length - position); + } + char scratch[4096]; + size_t count; + while (true) { + count = input->read(scratch, sizeof(scratch)); + if (0 == count) { + return true; + } + if (!out->write(scratch, count)) { + return false; + } + } +} + +bool StreamRemainingLengthIsBelow(SkStream* stream, size_t len) { + if (stream->hasLength() && stream->hasPosition()) { + size_t remainingBytes = stream->getLength() - stream->getPosition(); + return len > remainingBytes; + } + return false; +} diff --git a/gfx/skia/skia/src/core/SkStreamPriv.h b/gfx/skia/skia/src/core/SkStreamPriv.h new file mode 100644 index 0000000000..3aa7b6202b --- /dev/null +++ b/gfx/skia/skia/src/core/SkStreamPriv.h @@ -0,0 +1,50 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStreamPriv_DEFINED +#define SkStreamPriv_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" + +class SkData; + +/** + * Copy the provided stream to an SkData variable. + * + * Note: Assumes the stream is at the beginning. If it has a length, + * but is not at the beginning, this call will fail (return NULL). + * + * @param stream SkStream to be copied into data. + * @return The resulting SkData after the copy, nullptr on failure. + */ +sk_sp SkCopyStreamToData(SkStream* stream); + +/** + * Copies the input stream from the current position to the end. + * Does not rewind the input stream. + */ +bool SkStreamCopy(SkWStream* out, SkStream* input); + +/** A SkWStream that writes all output to SkDebugf, for debugging purposes. */ +class SkDebugfStream final : public SkWStream { +public: + bool write(const void* buffer, size_t size) override; + size_t bytesWritten() const override; + +private: + size_t fBytesWritten = 0; +}; + +// If the stream supports identifying the current position and total length, this returns +// true if there are not enough bytes in the stream to fulfill a read of the given length. +// Otherwise, it returns false. +// False does *not* mean a read will succeed of the given length, but true means we are +// certain it will fail. +bool StreamRemainingLengthIsBelow(SkStream* stream, size_t len); + +#endif // SkStreamPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkStrike.cpp b/gfx/skia/skia/src/core/SkStrike.cpp new file mode 100644 index 0000000000..8020df22bc --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrike.cpp @@ -0,0 +1,456 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkStrike.h" + +#include "include/core/SkDrawable.h" +#include "include/core/SkGraphics.h" +#include "include/core/SkPath.h" +#include "include/core/SkTraceMemoryDump.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkAssert.h" +#include "src/core/SkDistanceFieldGen.h" +#include "src/core/SkEnumerate.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkWriteBuffer.h" +#include "src/text/StrikeForGPU.h" + +#include +#include + +#if defined(SK_GANESH) + #include "src/text/gpu/StrikeCache.h" +#endif + +using namespace skglyph; + +static SkFontMetrics use_or_generate_metrics( + const SkFontMetrics* metrics, SkScalerContext* context) { + SkFontMetrics answer; + if (metrics) { + answer = *metrics; + } else { + context->getFontMetrics(&answer); + } + return answer; +} + +SkStrike::SkStrike(SkStrikeCache* strikeCache, + const SkStrikeSpec& strikeSpec, + std::unique_ptr scaler, + const SkFontMetrics* metrics, + std::unique_ptr pinner) + : fFontMetrics{use_or_generate_metrics(metrics, scaler.get())} + , fRoundingSpec{scaler->isSubpixel(), + scaler->computeAxisAlignmentForHText()} + , fStrikeSpec{strikeSpec} + , fStrikeCache{strikeCache} + , fScalerContext{std::move(scaler)} + , fPinner{std::move(pinner)} { + SkASSERT(fScalerContext != nullptr); +} + +class SK_SCOPED_CAPABILITY SkStrike::Monitor { +public: + Monitor(SkStrike* strike) SK_ACQUIRE(strike->fStrikeLock) + : fStrike{strike} { + fStrike->lock(); + } + + ~Monitor() SK_RELEASE_CAPABILITY() { + fStrike->unlock(); + } + +private: + SkStrike* const fStrike; +}; + +void SkStrike::lock() { + fStrikeLock.acquire(); + fMemoryIncrease = 0; +} + +void SkStrike::unlock() { + const size_t memoryIncrease = fMemoryIncrease; + fStrikeLock.release(); + this->updateMemoryUsage(memoryIncrease); +} + +void +SkStrike::FlattenGlyphsByType(SkWriteBuffer& buffer, + SkSpan images, + SkSpan paths, + SkSpan drawables) { + SkASSERT_RELEASE(SkTFitsIn(images.size()) && + SkTFitsIn(paths.size()) && + SkTFitsIn(drawables.size())); + + buffer.writeInt(images.size()); + for (SkGlyph& glyph : images) { + SkASSERT(SkMask::IsValidFormat(glyph.maskFormat())); + glyph.flattenMetrics(buffer); + glyph.flattenImage(buffer); + } + + buffer.writeInt(paths.size()); + for (SkGlyph& glyph : paths) { + SkASSERT(SkMask::IsValidFormat(glyph.maskFormat())); + glyph.flattenMetrics(buffer); + glyph.flattenPath(buffer); + } + + buffer.writeInt(drawables.size()); + for (SkGlyph& glyph : drawables) { + SkASSERT(SkMask::IsValidFormat(glyph.maskFormat())); + glyph.flattenMetrics(buffer); + glyph.flattenDrawable(buffer); + } +} + +bool SkStrike::mergeFromBuffer(SkReadBuffer& buffer) { + // Read glyphs with images for the current strike. + const int imagesCount = buffer.readInt(); + if (imagesCount == 0 && !buffer.isValid()) { + return false; + } + + { + Monitor m{this}; + for (int curImage = 0; curImage < imagesCount; ++curImage) { + if (!this->mergeGlyphAndImageFromBuffer(buffer)) { + return false; + } + } + } + + // Read glyphs with paths for the current strike. + const int pathsCount = buffer.readInt(); + if (pathsCount == 0 && !buffer.isValid()) { + return false; + } + { + Monitor m{this}; + for (int curPath = 0; curPath < pathsCount; ++curPath) { + if (!this->mergeGlyphAndPathFromBuffer(buffer)) { + return false; + } + } + } + + // Read glyphs with drawables for the current strike. + const int drawablesCount = buffer.readInt(); + if (drawablesCount == 0 && !buffer.isValid()) { + return false; + } + { + Monitor m{this}; + for (int curDrawable = 0; curDrawable < drawablesCount; ++curDrawable) { + if (!this->mergeGlyphAndDrawableFromBuffer(buffer)) { + return false; + } + } + } + + return true; +} + +SkGlyph* SkStrike::mergeGlyphAndImage(SkPackedGlyphID toID, const SkGlyph& fromGlyph) { + Monitor m{this}; + // TODO(herb): remove finding the glyph when setting the metrics and image are separated + SkGlyphDigest* digest = fDigestForPackedGlyphID.find(toID); + if (digest != nullptr) { + SkGlyph* glyph = fGlyphForIndex[digest->index()]; + if (fromGlyph.setImageHasBeenCalled()) { + if (glyph->setImageHasBeenCalled()) { + // Should never set an image on a glyph which already has an image. + SkDEBUGFAIL("Re-adding image to existing glyph. This should not happen."); + } + // TODO: assert that any metrics on fromGlyph are the same. + fMemoryIncrease += glyph->setMetricsAndImage(&fAlloc, fromGlyph); + } + return glyph; + } else { + SkGlyph* glyph = fAlloc.make(toID); + fMemoryIncrease += glyph->setMetricsAndImage(&fAlloc, fromGlyph) + sizeof(SkGlyph); + (void)this->addGlyphAndDigest(glyph); + return glyph; + } +} + +const SkPath* SkStrike::mergePath(SkGlyph* glyph, const SkPath* path, bool hairline) { + Monitor m{this}; + if (glyph->setPathHasBeenCalled()) { + SkDEBUGFAIL("Re-adding path to existing glyph. This should not happen."); + } + if (glyph->setPath(&fAlloc, path, hairline)) { + fMemoryIncrease += glyph->path()->approximateBytesUsed(); + } + + return glyph->path(); +} + +const SkDrawable* SkStrike::mergeDrawable(SkGlyph* glyph, sk_sp drawable) { + Monitor m{this}; + if (glyph->setDrawableHasBeenCalled()) { + SkDEBUGFAIL("Re-adding drawable to existing glyph. This should not happen."); + } + if (glyph->setDrawable(&fAlloc, std::move(drawable))) { + fMemoryIncrease += glyph->drawable()->approximateBytesUsed(); + SkASSERT(fMemoryIncrease > 0); + } + + return glyph->drawable(); +} + +void SkStrike::findIntercepts(const SkScalar bounds[2], SkScalar scale, SkScalar xPos, + SkGlyph* glyph, SkScalar* array, int* count) { + SkAutoMutexExclusive lock{fStrikeLock}; + glyph->ensureIntercepts(bounds, scale, xPos, array, count, &fAlloc); +} + +SkSpan SkStrike::metrics( + SkSpan glyphIDs, const SkGlyph* results[]) { + Monitor m{this}; + return this->internalPrepare(glyphIDs, kMetricsOnly, results); +} + +SkSpan SkStrike::preparePaths( + SkSpan glyphIDs, const SkGlyph* results[]) { + Monitor m{this}; + return this->internalPrepare(glyphIDs, kMetricsAndPath, results); +} + +SkSpan SkStrike::prepareImages( + SkSpan glyphIDs, const SkGlyph* results[]) { + const SkGlyph** cursor = results; + Monitor m{this}; + for (auto glyphID : glyphIDs) { + SkGlyph* glyph = this->glyph(glyphID); + this->prepareForImage(glyph); + *cursor++ = glyph; + } + + return {results, glyphIDs.size()}; +} + +SkSpan SkStrike::prepareDrawables( + SkSpan glyphIDs, const SkGlyph* results[]) { + const SkGlyph** cursor = results; + { + Monitor m{this}; + for (auto glyphID : glyphIDs) { + SkGlyph* glyph = this->glyph(SkPackedGlyphID{glyphID}); + this->prepareForDrawable(glyph); + *cursor++ = glyph; + } + } + + return {results, glyphIDs.size()}; +} + +void SkStrike::glyphIDsToPaths(SkSpan idsOrPaths) { + Monitor m{this}; + for (sktext::IDOrPath& idOrPath : idsOrPaths) { + SkGlyph* glyph = this->glyph(SkPackedGlyphID{idOrPath.fGlyphID}); + this->prepareForPath(glyph); + new (&idOrPath.fPath) SkPath{*glyph->path()}; + } +} + +void SkStrike::glyphIDsToDrawables(SkSpan idsOrDrawables) { + Monitor m{this}; + for (sktext::IDOrDrawable& idOrDrawable : idsOrDrawables) { + SkGlyph* glyph = this->glyph(SkPackedGlyphID{idOrDrawable.fGlyphID}); + this->prepareForDrawable(glyph); + SkASSERT(glyph->drawable() != nullptr); + idOrDrawable.fDrawable = glyph->drawable(); + } +} + +void SkStrike::dump() const { + SkAutoMutexExclusive lock{fStrikeLock}; + const SkTypeface* face = fScalerContext->getTypeface(); + const SkScalerContextRec& rec = fScalerContext->getRec(); + SkMatrix matrix; + rec.getSingleMatrix(&matrix); + matrix.preScale(SkScalarInvert(rec.fTextSize), SkScalarInvert(rec.fTextSize)); + SkString name; + face->getFamilyName(&name); + + SkString msg; + SkFontStyle style = face->fontStyle(); + msg.printf("cache typeface:%x %25s:(%d,%d,%d)\n %s glyphs:%3d", + face->uniqueID(), name.c_str(), style.weight(), style.width(), style.slant(), + rec.dump().c_str(), fDigestForPackedGlyphID.count()); + SkDebugf("%s\n", msg.c_str()); +} + +void SkStrike::dumpMemoryStatistics(SkTraceMemoryDump* dump) const { + SkAutoMutexExclusive lock{fStrikeLock}; + const SkTypeface* face = fScalerContext->getTypeface(); + const SkScalerContextRec& rec = fScalerContext->getRec(); + + SkString fontName; + face->getFamilyName(&fontName); + // Replace all special characters with '_'. + for (size_t index = 0; index < fontName.size(); ++index) { + if (!std::isalnum(fontName[index])) { + fontName[index] = '_'; + } + } + + SkString dumpName = SkStringPrintf("%s/%s_%d/%p", + SkStrikeCache::kGlyphCacheDumpName, + fontName.c_str(), + rec.fTypefaceID, + this); + + dump->dumpNumericValue(dumpName.c_str(), "size", "bytes", fMemoryUsed); + dump->dumpNumericValue(dumpName.c_str(), + "glyph_count", "objects", + fDigestForPackedGlyphID.count()); + dump->setMemoryBacking(dumpName.c_str(), "malloc", nullptr); +} + +SkGlyph* SkStrike::glyph(SkGlyphDigest digest) { + return fGlyphForIndex[digest.index()]; +} + +SkGlyph* SkStrike::glyph(SkPackedGlyphID packedGlyphID) { + SkGlyphDigest digest = this->digestFor(kDirectMask, packedGlyphID); + return this->glyph(digest); +} + +SkGlyphDigest SkStrike::digestFor(ActionType actionType, SkPackedGlyphID packedGlyphID) { + SkGlyphDigest* digestPtr = fDigestForPackedGlyphID.find(packedGlyphID); + if (digestPtr != nullptr && digestPtr->actionFor(actionType) != GlyphAction::kUnset) { + return *digestPtr; + } + + SkGlyph* glyph; + if (digestPtr != nullptr) { + glyph = fGlyphForIndex[digestPtr->index()]; + } else { + glyph = fAlloc.make(fScalerContext->makeGlyph(packedGlyphID, &fAlloc)); + fMemoryIncrease += sizeof(SkGlyph); + digestPtr = this->addGlyphAndDigest(glyph); + } + + digestPtr->setActionFor(actionType, glyph, this); + + return *digestPtr; +} + +SkGlyphDigest* SkStrike::addGlyphAndDigest(SkGlyph* glyph) { + size_t index = fGlyphForIndex.size(); + SkGlyphDigest digest = SkGlyphDigest{index, *glyph}; + SkGlyphDigest* newDigest = fDigestForPackedGlyphID.set(digest); + fGlyphForIndex.push_back(glyph); + return newDigest; +} + +bool SkStrike::prepareForImage(SkGlyph* glyph) { + if (glyph->setImage(&fAlloc, fScalerContext.get())) { + fMemoryIncrease += glyph->imageSize(); + } + return glyph->image() != nullptr; +} + +bool SkStrike::prepareForPath(SkGlyph* glyph) { + if (glyph->setPath(&fAlloc, fScalerContext.get())) { + fMemoryIncrease += glyph->path()->approximateBytesUsed(); + } + return glyph->path() !=nullptr; +} + +bool SkStrike::prepareForDrawable(SkGlyph* glyph) { + if (glyph->setDrawable(&fAlloc, fScalerContext.get())) { + size_t increase = glyph->drawable()->approximateBytesUsed(); + SkASSERT(increase > 0); + fMemoryIncrease += increase; + } + return glyph->drawable() != nullptr; +} + +SkGlyph* SkStrike::mergeGlyphFromBuffer(SkReadBuffer& buffer) { + SkASSERT(buffer.isValid()); + std::optional prototypeGlyph = SkGlyph::MakeFromBuffer(buffer); + if (!buffer.validate(prototypeGlyph.has_value())) { + return nullptr; + } + + // Check if this glyph has already been seen. + SkGlyphDigest* digestPtr = fDigestForPackedGlyphID.find(prototypeGlyph->getPackedID()); + if (digestPtr != nullptr) { + return fGlyphForIndex[digestPtr->index()]; + } + + // This is the first time. Allocate a new glyph. + SkGlyph* glyph = fAlloc.make(prototypeGlyph.value()); + fMemoryIncrease += sizeof(SkGlyph); + this->addGlyphAndDigest(glyph); + return glyph; +} + +bool SkStrike::mergeGlyphAndImageFromBuffer(SkReadBuffer& buffer) { + SkASSERT(buffer.isValid()); + SkGlyph* glyph = this->mergeGlyphFromBuffer(buffer); + if (!buffer.validate(glyph != nullptr)) { + return false; + } + fMemoryIncrease += glyph->addImageFromBuffer(buffer, &fAlloc); + return buffer.isValid(); +} + +bool SkStrike::mergeGlyphAndPathFromBuffer(SkReadBuffer& buffer) { + SkASSERT(buffer.isValid()); + SkGlyph* glyph = this->mergeGlyphFromBuffer(buffer); + if (!buffer.validate(glyph != nullptr)) { + return false; + } + fMemoryIncrease += glyph->addPathFromBuffer(buffer, &fAlloc); + return buffer.isValid(); +} + +bool SkStrike::mergeGlyphAndDrawableFromBuffer(SkReadBuffer& buffer) { + SkASSERT(buffer.isValid()); + SkGlyph* glyph = this->mergeGlyphFromBuffer(buffer); + if (!buffer.validate(glyph != nullptr)) { + return false; + } + fMemoryIncrease += glyph->addDrawableFromBuffer(buffer, &fAlloc); + return buffer.isValid(); +} + +SkSpan SkStrike::internalPrepare( + SkSpan glyphIDs, PathDetail pathDetail, const SkGlyph** results) { + const SkGlyph** cursor = results; + for (auto glyphID : glyphIDs) { + SkGlyph* glyph = this->glyph(SkPackedGlyphID{glyphID}); + if (pathDetail == kMetricsAndPath) { + this->prepareForPath(glyph); + } + *cursor++ = glyph; + } + + return {results, glyphIDs.size()}; +} + +void SkStrike::updateMemoryUsage(size_t increase) { + if (increase > 0) { + // fRemoved and the cache's total memory are managed under the cache's lock. This allows + // them to be accessed under LRU operation. + SkAutoMutexExclusive lock{fStrikeCache->fLock}; + fMemoryUsed += increase; + if (!fRemoved) { + fStrikeCache->fTotalMemoryUsed += increase; + } + } +} diff --git a/gfx/skia/skia/src/core/SkStrike.h b/gfx/skia/skia/src/core/SkStrike.h new file mode 100644 index 0000000000..72eca3b486 --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrike.h @@ -0,0 +1,205 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + */ + +#ifndef SkStrike_DEFINED +#define SkStrike_DEFINED + +#include "include/core/SkFontMetrics.h" +#include "include/core/SkFontTypes.h" +#include "include/core/SkRefCnt.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkDescriptor.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkGlyphRunPainter.h" +#include "src/core/SkStrikeSpec.h" +#include "src/core/SkTHash.h" + +#include + +class SkScalerContext; +class SkStrikeCache; +class SkTraceMemoryDump; + +namespace sktext { +union IDOrPath; +union IDOrDrawable; +} // namespace sktext + +class SkStrikePinner { +public: + virtual ~SkStrikePinner() = default; + virtual bool canDelete() = 0; + virtual void assertValid() {} +}; + +// This class holds the results of an SkScalerContext, and owns a references to that scaler. +class SkStrike final : public sktext::StrikeForGPU { +public: + SkStrike(SkStrikeCache* strikeCache, + const SkStrikeSpec& strikeSpec, + std::unique_ptr scaler, + const SkFontMetrics* metrics, + std::unique_ptr pinner); + + void lock() override SK_ACQUIRE(fStrikeLock); + void unlock() override SK_RELEASE_CAPABILITY(fStrikeLock); + SkGlyphDigest digestFor(skglyph::ActionType, SkPackedGlyphID) override SK_REQUIRES(fStrikeLock); + bool prepareForImage(SkGlyph* glyph) override SK_REQUIRES(fStrikeLock); + bool prepareForPath(SkGlyph*) override SK_REQUIRES(fStrikeLock); + bool prepareForDrawable(SkGlyph*) override SK_REQUIRES(fStrikeLock); + + bool mergeFromBuffer(SkReadBuffer& buffer) SK_EXCLUDES(fStrikeLock); + static void FlattenGlyphsByType(SkWriteBuffer& buffer, + SkSpan images, + SkSpan paths, + SkSpan drawables); + + // Lookup (or create if needed) the returned glyph using toID. If that glyph is not initialized + // with an image, then use the information in fromGlyph to initialize the width, height top, + // left, format and image of the glyph. This is mainly used preserving the glyph if it was + // created by a search of desperation. This is deprecated. + SkGlyph* mergeGlyphAndImage( + SkPackedGlyphID toID, const SkGlyph& fromGlyph) SK_EXCLUDES(fStrikeLock); + + // If the path has never been set, then add a path to glyph. This is deprecated. + const SkPath* mergePath( + SkGlyph* glyph, const SkPath* path, bool hairline) SK_EXCLUDES(fStrikeLock); + + // If the drawable has never been set, then add a drawable to glyph. This is deprecated. + const SkDrawable* mergeDrawable( + SkGlyph* glyph, sk_sp drawable) SK_EXCLUDES(fStrikeLock); + + // If the advance axis intersects the glyph's path, append the positions scaled and offset + // to the array (if non-null), and set the count to the updated array length. + // TODO: track memory usage. + void findIntercepts(const SkScalar bounds[2], SkScalar scale, SkScalar xPos, + SkGlyph*, SkScalar* array, int* count) SK_EXCLUDES(fStrikeLock); + + const SkFontMetrics& getFontMetrics() const { + return fFontMetrics; + } + + SkSpan metrics( + SkSpan glyphIDs, const SkGlyph* results[]) SK_EXCLUDES(fStrikeLock); + + SkSpan preparePaths( + SkSpan glyphIDs, const SkGlyph* results[]) SK_EXCLUDES(fStrikeLock); + + SkSpan prepareImages(SkSpan glyphIDs, + const SkGlyph* results[]) SK_EXCLUDES(fStrikeLock); + + SkSpan prepareDrawables( + SkSpan glyphIDs, const SkGlyph* results[]) SK_EXCLUDES(fStrikeLock); + + // SkStrikeForGPU APIs + const SkDescriptor& getDescriptor() const override { + return fStrikeSpec.descriptor(); + } + + const SkGlyphPositionRoundingSpec& roundingSpec() const override { + return fRoundingSpec; + } + + sktext::SkStrikePromise strikePromise() override { + return sktext::SkStrikePromise(sk_ref_sp(this)); + } + + // Convert all the IDs into SkPaths in the span. + void glyphIDsToPaths(SkSpan idsOrPaths) SK_EXCLUDES(fStrikeLock); + + // Convert all the IDs into SkDrawables in the span. + void glyphIDsToDrawables(SkSpan idsOrDrawables) SK_EXCLUDES(fStrikeLock); + + const SkStrikeSpec& strikeSpec() const { + return fStrikeSpec; + } + + void verifyPinnedStrike() const { + if (fPinner != nullptr) { + fPinner->assertValid(); + } + } + + void dump() const SK_EXCLUDES(fStrikeLock); + void dumpMemoryStatistics(SkTraceMemoryDump* dump) const SK_EXCLUDES(fStrikeLock); + + SkGlyph* glyph(SkGlyphDigest) SK_REQUIRES(fStrikeLock); + +private: + friend class SkStrikeCache; + friend class SkStrikeTestingPeer; + class Monitor; + + // Return a glyph. Create it if it doesn't exist, and initialize the glyph with metrics and + // advances using a scaler. + SkGlyph* glyph(SkPackedGlyphID) SK_REQUIRES(fStrikeLock); + + // Generate the glyph digest information and update structures to add the glyph. + SkGlyphDigest* addGlyphAndDigest(SkGlyph* glyph) SK_REQUIRES(fStrikeLock); + + SkGlyph* mergeGlyphFromBuffer(SkReadBuffer& buffer) SK_REQUIRES(fStrikeLock); + bool mergeGlyphAndImageFromBuffer(SkReadBuffer& buffer) SK_REQUIRES(fStrikeLock); + bool mergeGlyphAndPathFromBuffer(SkReadBuffer& buffer) SK_REQUIRES(fStrikeLock); + bool mergeGlyphAndDrawableFromBuffer(SkReadBuffer& buffer) SK_REQUIRES(fStrikeLock); + + // Maintain memory use statistics. + void updateMemoryUsage(size_t increase) SK_EXCLUDES(fStrikeLock); + + enum PathDetail { + kMetricsOnly, + kMetricsAndPath + }; + + // internalPrepare will only be called with a mutex already held. + SkSpan internalPrepare( + SkSpan glyphIDs, + PathDetail pathDetail, + const SkGlyph** results) SK_REQUIRES(fStrikeLock); + + // The following are const and need no mutex protection. + const SkFontMetrics fFontMetrics; + const SkGlyphPositionRoundingSpec fRoundingSpec; + const SkStrikeSpec fStrikeSpec; + SkStrikeCache* const fStrikeCache; + + // This mutex provides protection for this specific SkStrike. + mutable SkMutex fStrikeLock; + + // Maps from a combined GlyphID and sub-pixel position to a SkGlyphDigest. The actual glyph is + // stored in the fAlloc. The pointer to the glyph is stored fGlyphForIndex. The + // SkGlyphDigest's fIndex field stores the index. This pointer provides an unchanging + // reference to the SkGlyph as long as the strike is alive, and fGlyphForIndex + // provides a dense index for glyphs. + SkTHashTable + fDigestForPackedGlyphID SK_GUARDED_BY(fStrikeLock); + + // Maps from a glyphIndex to a glyph + std::vector fGlyphForIndex SK_GUARDED_BY(fStrikeLock); + + // Context that corresponds to the glyph information in this strike. + const std::unique_ptr fScalerContext SK_GUARDED_BY(fStrikeLock); + + // Used while changing the strike to track memory increase. + size_t fMemoryIncrease SK_GUARDED_BY(fStrikeLock) {0}; + + // So, we don't grow our arrays a lot. + inline static constexpr size_t kMinGlyphCount = 8; + inline static constexpr size_t kMinGlyphImageSize = 16 /* height */ * 8 /* width */; + inline static constexpr size_t kMinAllocAmount = kMinGlyphImageSize * kMinGlyphCount; + + SkArenaAlloc fAlloc SK_GUARDED_BY(fStrikeLock) {kMinAllocAmount}; + + // The following are protected by the SkStrikeCache's mutex. + SkStrike* fNext{nullptr}; + SkStrike* fPrev{nullptr}; + std::unique_ptr fPinner; + size_t fMemoryUsed{sizeof(SkStrike)}; + bool fRemoved{false}; +}; + +#endif // SkStrike_DEFINED diff --git a/gfx/skia/skia/src/core/SkStrikeCache.cpp b/gfx/skia/skia/src/core/SkStrikeCache.cpp new file mode 100644 index 0000000000..4b2e255903 --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrikeCache.cpp @@ -0,0 +1,326 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkStrikeCache.h" + +#include + +#include "include/core/SkGraphics.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTraceMemoryDump.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkStrike.h" + +#if defined(SK_GANESH) +#include "src/text/gpu/StrikeCache.h" +#endif + +using namespace sktext; + +bool gSkUseThreadLocalStrikeCaches_IAcknowledgeThisIsIncrediblyExperimental = false; + +SkStrikeCache* SkStrikeCache::GlobalStrikeCache() { + if (gSkUseThreadLocalStrikeCaches_IAcknowledgeThisIsIncrediblyExperimental) { + static thread_local auto* cache = new SkStrikeCache; + return cache; + } + static auto* cache = new SkStrikeCache; + return cache; +} + +auto SkStrikeCache::findOrCreateStrike(const SkStrikeSpec& strikeSpec) -> sk_sp { + SkAutoMutexExclusive ac(fLock); + sk_sp strike = this->internalFindStrikeOrNull(strikeSpec.descriptor()); + if (strike == nullptr) { + strike = this->internalCreateStrike(strikeSpec); + } + this->internalPurge(); + return strike; +} + +sk_sp SkStrikeCache::findOrCreateScopedStrike(const SkStrikeSpec& strikeSpec) { + return this->findOrCreateStrike(strikeSpec); +} + +void SkStrikeCache::PurgeAll() { + GlobalStrikeCache()->purgeAll(); +} + +void SkStrikeCache::Dump() { + SkDebugf("GlyphCache [ used budget ]\n"); + SkDebugf(" bytes [ %8zu %8zu ]\n", + SkGraphics::GetFontCacheUsed(), SkGraphics::GetFontCacheLimit()); + SkDebugf(" count [ %8d %8d ]\n", + SkGraphics::GetFontCacheCountUsed(), SkGraphics::GetFontCacheCountLimit()); + + auto visitor = [](const SkStrike& strike) { + strike.dump(); + }; + + GlobalStrikeCache()->forEachStrike(visitor); +} + +void SkStrikeCache::DumpMemoryStatistics(SkTraceMemoryDump* dump) { + dump->dumpNumericValue(kGlyphCacheDumpName, "size", "bytes", SkGraphics::GetFontCacheUsed()); + dump->dumpNumericValue(kGlyphCacheDumpName, "budget_size", "bytes", + SkGraphics::GetFontCacheLimit()); + dump->dumpNumericValue(kGlyphCacheDumpName, "glyph_count", "objects", + SkGraphics::GetFontCacheCountUsed()); + dump->dumpNumericValue(kGlyphCacheDumpName, "budget_glyph_count", "objects", + SkGraphics::GetFontCacheCountLimit()); + + if (dump->getRequestedDetails() == SkTraceMemoryDump::kLight_LevelOfDetail) { + dump->setMemoryBacking(kGlyphCacheDumpName, "malloc", nullptr); + return; + } + + auto visitor = [&](const SkStrike& strike) { + strike.dumpMemoryStatistics(dump); + }; + + GlobalStrikeCache()->forEachStrike(visitor); +} + +sk_sp SkStrikeCache::findStrike(const SkDescriptor& desc) { + SkAutoMutexExclusive ac(fLock); + sk_sp result = this->internalFindStrikeOrNull(desc); + this->internalPurge(); + return result; +} + +auto SkStrikeCache::internalFindStrikeOrNull(const SkDescriptor& desc) -> sk_sp { + + // Check head because it is likely the strike we are looking for. + if (fHead != nullptr && fHead->getDescriptor() == desc) { return sk_ref_sp(fHead); } + + // Do the heavy search looking for the strike. + sk_sp* strikeHandle = fStrikeLookup.find(desc); + if (strikeHandle == nullptr) { return nullptr; } + SkStrike* strikePtr = strikeHandle->get(); + SkASSERT(strikePtr != nullptr); + if (fHead != strikePtr) { + // Make most recently used + strikePtr->fPrev->fNext = strikePtr->fNext; + if (strikePtr->fNext != nullptr) { + strikePtr->fNext->fPrev = strikePtr->fPrev; + } else { + fTail = strikePtr->fPrev; + } + fHead->fPrev = strikePtr; + strikePtr->fNext = fHead; + strikePtr->fPrev = nullptr; + fHead = strikePtr; + } + return sk_ref_sp(strikePtr); +} + +sk_sp SkStrikeCache::createStrike( + const SkStrikeSpec& strikeSpec, + SkFontMetrics* maybeMetrics, + std::unique_ptr pinner) { + SkAutoMutexExclusive ac(fLock); + return this->internalCreateStrike(strikeSpec, maybeMetrics, std::move(pinner)); +} + +auto SkStrikeCache::internalCreateStrike( + const SkStrikeSpec& strikeSpec, + SkFontMetrics* maybeMetrics, + std::unique_ptr pinner) -> sk_sp { + std::unique_ptr scaler = strikeSpec.createScalerContext(); + auto strike = + sk_make_sp(this, strikeSpec, std::move(scaler), maybeMetrics, std::move(pinner)); + this->internalAttachToHead(strike); + return strike; +} + +void SkStrikeCache::purgeAll() { + SkAutoMutexExclusive ac(fLock); + this->internalPurge(fTotalMemoryUsed); +} + +size_t SkStrikeCache::getTotalMemoryUsed() const { + SkAutoMutexExclusive ac(fLock); + return fTotalMemoryUsed; +} + +int SkStrikeCache::getCacheCountUsed() const { + SkAutoMutexExclusive ac(fLock); + return fCacheCount; +} + +int SkStrikeCache::getCacheCountLimit() const { + SkAutoMutexExclusive ac(fLock); + return fCacheCountLimit; +} + +size_t SkStrikeCache::setCacheSizeLimit(size_t newLimit) { + SkAutoMutexExclusive ac(fLock); + + size_t prevLimit = fCacheSizeLimit; + fCacheSizeLimit = newLimit; + this->internalPurge(); + return prevLimit; +} + +size_t SkStrikeCache::getCacheSizeLimit() const { + SkAutoMutexExclusive ac(fLock); + return fCacheSizeLimit; +} + +int SkStrikeCache::setCacheCountLimit(int newCount) { + if (newCount < 0) { + newCount = 0; + } + + SkAutoMutexExclusive ac(fLock); + + int prevCount = fCacheCountLimit; + fCacheCountLimit = newCount; + this->internalPurge(); + return prevCount; +} + +void SkStrikeCache::forEachStrike(std::function visitor) const { + SkAutoMutexExclusive ac(fLock); + + this->validate(); + + for (SkStrike* strike = fHead; strike != nullptr; strike = strike->fNext) { + visitor(*strike); + } +} + +size_t SkStrikeCache::internalPurge(size_t minBytesNeeded) { + size_t bytesNeeded = 0; + if (fTotalMemoryUsed > fCacheSizeLimit) { + bytesNeeded = fTotalMemoryUsed - fCacheSizeLimit; + } + bytesNeeded = std::max(bytesNeeded, minBytesNeeded); + if (bytesNeeded) { + // no small purges! + bytesNeeded = std::max(bytesNeeded, fTotalMemoryUsed >> 2); + } + + int countNeeded = 0; + if (fCacheCount > fCacheCountLimit) { + countNeeded = fCacheCount - fCacheCountLimit; + // no small purges! + countNeeded = std::max(countNeeded, fCacheCount >> 2); + } + + // early exit + if (!countNeeded && !bytesNeeded) { + return 0; + } + + size_t bytesFreed = 0; + int countFreed = 0; + + // Start at the tail and proceed backwards deleting; the list is in LRU + // order, with unimportant entries at the tail. + SkStrike* strike = fTail; + while (strike != nullptr && (bytesFreed < bytesNeeded || countFreed < countNeeded)) { + SkStrike* prev = strike->fPrev; + + // Only delete if the strike is not pinned. + if (strike->fPinner == nullptr || strike->fPinner->canDelete()) { + bytesFreed += strike->fMemoryUsed; + countFreed += 1; + this->internalRemoveStrike(strike); + } + strike = prev; + } + + this->validate(); + +#ifdef SPEW_PURGE_STATUS + if (countFreed) { + SkDebugf("purging %dK from font cache [%d entries]\n", + (int)(bytesFreed >> 10), countFreed); + } +#endif + + return bytesFreed; +} + +void SkStrikeCache::internalAttachToHead(sk_sp strike) { + SkASSERT(fStrikeLookup.find(strike->getDescriptor()) == nullptr); + SkStrike* strikePtr = strike.get(); + fStrikeLookup.set(std::move(strike)); + SkASSERT(nullptr == strikePtr->fPrev && nullptr == strikePtr->fNext); + + fCacheCount += 1; + fTotalMemoryUsed += strikePtr->fMemoryUsed; + + if (fHead != nullptr) { + fHead->fPrev = strikePtr; + strikePtr->fNext = fHead; + } + + if (fTail == nullptr) { + fTail = strikePtr; + } + + fHead = strikePtr; // Transfer ownership of strike to the cache list. +} + +void SkStrikeCache::internalRemoveStrike(SkStrike* strike) { + SkASSERT(fCacheCount > 0); + fCacheCount -= 1; + fTotalMemoryUsed -= strike->fMemoryUsed; + + if (strike->fPrev) { + strike->fPrev->fNext = strike->fNext; + } else { + fHead = strike->fNext; + } + if (strike->fNext) { + strike->fNext->fPrev = strike->fPrev; + } else { + fTail = strike->fPrev; + } + + strike->fPrev = strike->fNext = nullptr; + strike->fRemoved = true; + fStrikeLookup.remove(strike->getDescriptor()); +} + +void SkStrikeCache::validate() const { +#ifdef SK_DEBUG + size_t computedBytes = 0; + int computedCount = 0; + + const SkStrike* strike = fHead; + while (strike != nullptr) { + computedBytes += strike->fMemoryUsed; + computedCount += 1; + SkASSERT(fStrikeLookup.findOrNull(strike->getDescriptor()) != nullptr); + strike = strike->fNext; + } + + if (fCacheCount != computedCount) { + SkDebugf("fCacheCount: %d, computedCount: %d", fCacheCount, computedCount); + SK_ABORT("fCacheCount != computedCount"); + } + if (fTotalMemoryUsed != computedBytes) { + SkDebugf("fTotalMemoryUsed: %zu, computedBytes: %zu", fTotalMemoryUsed, computedBytes); + SK_ABORT("fTotalMemoryUsed == computedBytes"); + } +#endif +} + +const SkDescriptor& SkStrikeCache::StrikeTraits::GetKey(const sk_sp& strike) { + return strike->getDescriptor(); +} + +uint32_t SkStrikeCache::StrikeTraits::Hash(const SkDescriptor& descriptor) { + return descriptor.getChecksum(); +} + + diff --git a/gfx/skia/skia/src/core/SkStrikeCache.h b/gfx/skia/skia/src/core/SkStrikeCache.h new file mode 100644 index 0000000000..76d7d1eb98 --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrikeCache.h @@ -0,0 +1,108 @@ +/* + * Copyright 2010 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStrikeCache_DEFINED +#define SkStrikeCache_DEFINED + +#include "include/core/SkDrawable.h" +#include "include/private/SkSpinlock.h" +#include "include/private/base/SkLoadUserConfig.h" // IWYU pragma: keep +#include "include/private/base/SkMutex.h" +#include "src/core/SkDescriptor.h" +#include "src/core/SkStrikeSpec.h" +#include "src/text/StrikeForGPU.h" + +class SkStrike; +class SkStrikePinner; +class SkTraceMemoryDump; + +// SK_DEFAULT_FONT_CACHE_COUNT_LIMIT and SK_DEFAULT_FONT_CACHE_LIMIT can be set using -D on your +// compiler commandline, or by using the defines in SkUserConfig.h +#ifndef SK_DEFAULT_FONT_CACHE_COUNT_LIMIT + #define SK_DEFAULT_FONT_CACHE_COUNT_LIMIT 2048 +#endif + +#ifndef SK_DEFAULT_FONT_CACHE_LIMIT + #define SK_DEFAULT_FONT_CACHE_LIMIT (2 * 1024 * 1024) +#endif + +/////////////////////////////////////////////////////////////////////////////// + +class SkStrikeCache final : public sktext::StrikeForGPUCacheInterface { +public: + SkStrikeCache() = default; + + static SkStrikeCache* GlobalStrikeCache(); + + sk_sp findStrike(const SkDescriptor& desc) SK_EXCLUDES(fLock); + + sk_sp createStrike( + const SkStrikeSpec& strikeSpec, + SkFontMetrics* maybeMetrics = nullptr, + std::unique_ptr = nullptr) SK_EXCLUDES(fLock); + + sk_sp findOrCreateStrike(const SkStrikeSpec& strikeSpec) SK_EXCLUDES(fLock); + + sk_sp findOrCreateScopedStrike( + const SkStrikeSpec& strikeSpec) override SK_EXCLUDES(fLock); + + static void PurgeAll(); + static void Dump(); + + // Dump memory usage statistics of all the attaches caches in the process using the + // SkTraceMemoryDump interface. + static void DumpMemoryStatistics(SkTraceMemoryDump* dump); + + void purgeAll() SK_EXCLUDES(fLock); // does not change budget + + int getCacheCountLimit() const SK_EXCLUDES(fLock); + int setCacheCountLimit(int limit) SK_EXCLUDES(fLock); + int getCacheCountUsed() const SK_EXCLUDES(fLock); + + size_t getCacheSizeLimit() const SK_EXCLUDES(fLock); + size_t setCacheSizeLimit(size_t limit) SK_EXCLUDES(fLock); + size_t getTotalMemoryUsed() const SK_EXCLUDES(fLock); + +private: + friend class SkStrike; // for SkStrike::updateDelta + static constexpr char kGlyphCacheDumpName[] = "skia/sk_glyph_cache"; + sk_sp internalFindStrikeOrNull(const SkDescriptor& desc) SK_REQUIRES(fLock); + sk_sp internalCreateStrike( + const SkStrikeSpec& strikeSpec, + SkFontMetrics* maybeMetrics = nullptr, + std::unique_ptr = nullptr) SK_REQUIRES(fLock); + + // The following methods can only be called when mutex is already held. + void internalRemoveStrike(SkStrike* strike) SK_REQUIRES(fLock); + void internalAttachToHead(sk_sp strike) SK_REQUIRES(fLock); + + // Checkout budgets, modulated by the specified min-bytes-needed-to-purge, + // and attempt to purge caches to match. + // Returns number of bytes freed. + size_t internalPurge(size_t minBytesNeeded = 0) SK_REQUIRES(fLock); + + // A simple accounting of what each glyph cache reports and the strike cache total. + void validate() const SK_REQUIRES(fLock); + + void forEachStrike(std::function visitor) const SK_EXCLUDES(fLock); + + mutable SkMutex fLock; + SkStrike* fHead SK_GUARDED_BY(fLock) {nullptr}; + SkStrike* fTail SK_GUARDED_BY(fLock) {nullptr}; + struct StrikeTraits { + static const SkDescriptor& GetKey(const sk_sp& strike); + static uint32_t Hash(const SkDescriptor& descriptor); + }; + SkTHashTable, SkDescriptor, StrikeTraits> fStrikeLookup SK_GUARDED_BY(fLock); + + size_t fCacheSizeLimit{SK_DEFAULT_FONT_CACHE_LIMIT}; + size_t fTotalMemoryUsed SK_GUARDED_BY(fLock) {0}; + int32_t fCacheCountLimit{SK_DEFAULT_FONT_CACHE_COUNT_LIMIT}; + int32_t fCacheCount SK_GUARDED_BY(fLock) {0}; +}; + +#endif // SkStrikeCache_DEFINED diff --git a/gfx/skia/skia/src/core/SkStrikeSpec.cpp b/gfx/skia/skia/src/core/SkStrikeSpec.cpp new file mode 100644 index 0000000000..43a74eee0d --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrikeSpec.cpp @@ -0,0 +1,309 @@ +/* + * Copyright 2019 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkStrikeSpec.h" + +#include "include/core/SkGraphics.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPathEffect.h" +#include "include/effects/SkDashPathEffect.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkDraw.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeCache.h" + +#if defined(SK_GANESH) || defined(SK_GRAPHITE) +#include "src/text/gpu/SDFMaskFilter.h" +#include "src/text/gpu/SDFTControl.h" +#include "src/text/gpu/StrikeCache.h" +#endif + +SkStrikeSpec::SkStrikeSpec(const SkDescriptor& descriptor, sk_sp typeface) + : fAutoDescriptor{descriptor} + , fTypeface{std::move(typeface)} {} + +SkStrikeSpec::SkStrikeSpec(const SkStrikeSpec&) = default; +SkStrikeSpec::SkStrikeSpec(SkStrikeSpec&&) = default; +SkStrikeSpec::~SkStrikeSpec() = default; + +SkStrikeSpec SkStrikeSpec::MakeMask(const SkFont& font, const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix) { + + return SkStrikeSpec(font, paint, surfaceProps, scalerContextFlags, deviceMatrix); +} + +SkStrikeSpec SkStrikeSpec::MakeTransformMask(const SkFont& font, + const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix) { + SkFont sourceFont{font}; + sourceFont.setSubpixel(false); + return SkStrikeSpec(sourceFont, paint, surfaceProps, scalerContextFlags, deviceMatrix); +} + +std::tuple SkStrikeSpec::MakePath( + const SkFont& font, const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags) { + + // setup our std runPaint, in hopes of getting hits in the cache + SkPaint pathPaint{paint}; + SkFont pathFont{font}; + + // The sub-pixel position will always happen when transforming to the screen. + pathFont.setSubpixel(false); + + // The factor to get from the size stored in the strike to the size needed for + // the source. + SkScalar strikeToSourceScale = pathFont.setupForAsPaths(&pathPaint); + + return {SkStrikeSpec(pathFont, pathPaint, surfaceProps, scalerContextFlags, SkMatrix::I()), + strikeToSourceScale}; +} + +std::tuple SkStrikeSpec::MakeCanonicalized( + const SkFont& font, const SkPaint* paint) { + SkPaint canonicalizedPaint; + if (paint != nullptr) { + canonicalizedPaint = *paint; + } + + const SkFont* canonicalizedFont = &font; + SkTLazy pathFont; + SkScalar strikeToSourceScale = 1; + if (ShouldDrawAsPath(canonicalizedPaint, font, SkMatrix::I())) { + canonicalizedFont = pathFont.set(font); + strikeToSourceScale = pathFont->setupForAsPaths(nullptr); + canonicalizedPaint.reset(); + } + + return {SkStrikeSpec(*canonicalizedFont, canonicalizedPaint, SkSurfaceProps(), + SkScalerContextFlags::kFakeGammaAndBoostContrast, SkMatrix::I()), + strikeToSourceScale}; +} + +SkStrikeSpec SkStrikeSpec::MakeWithNoDevice(const SkFont& font, const SkPaint* paint) { + SkPaint setupPaint; + if (paint != nullptr) { + setupPaint = *paint; + } + + return SkStrikeSpec(font, setupPaint, SkSurfaceProps(), + SkScalerContextFlags::kFakeGammaAndBoostContrast, SkMatrix::I()); +} + +bool SkStrikeSpec::ShouldDrawAsPath( + const SkPaint& paint, const SkFont& font, const SkMatrix& viewMatrix) { + + // hairline glyphs are fast enough, so we don't need to cache them + if (SkPaint::kStroke_Style == paint.getStyle() && 0 == paint.getStrokeWidth()) { + return true; + } + + // we don't cache perspective + if (viewMatrix.hasPerspective()) { + return true; + } + + // Glyphs like Emojis can't be rendered as a path. + if (font.getTypeface() && font.getTypeface()->hasColorGlyphs()) { + return false; + } + + SkMatrix textMatrix = SkFontPriv::MakeTextMatrix(font); + textMatrix.postConcat(viewMatrix); + + // we have a self-imposed maximum, just to limit memory-usage + constexpr SkScalar memoryLimit = 256; + constexpr SkScalar maxSizeSquared = memoryLimit * memoryLimit; + + auto distance = [&textMatrix](int XIndex, int YIndex) { + return textMatrix[XIndex] * textMatrix[XIndex] + textMatrix[YIndex] * textMatrix[YIndex]; + }; + + return distance(SkMatrix::kMScaleX, SkMatrix::kMSkewY ) > maxSizeSquared + || distance(SkMatrix::kMSkewX, SkMatrix::kMScaleY) > maxSizeSquared; +} + +SkString SkStrikeSpec::dump() const { + return fAutoDescriptor.getDesc()->dumpRec(); +} + +SkStrikeSpec SkStrikeSpec::MakePDFVector(const SkTypeface& typeface, int* size) { + SkFont font; + font.setHinting(SkFontHinting::kNone); + font.setEdging(SkFont::Edging::kAlias); + font.setTypeface(sk_ref_sp(&typeface)); + int unitsPerEm = typeface.getUnitsPerEm(); + if (unitsPerEm <= 0) { + unitsPerEm = 1024; + } + if (size) { + *size = unitsPerEm; + } + font.setSize((SkScalar)unitsPerEm); + + return SkStrikeSpec(font, + SkPaint(), + SkSurfaceProps(0, kUnknown_SkPixelGeometry), + SkScalerContextFlags::kFakeGammaAndBoostContrast, + SkMatrix::I()); +} + +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) && !defined(SK_DISABLE_SDF_TEXT) +std::tuple +SkStrikeSpec::MakeSDFT(const SkFont& font, const SkPaint& paint, + const SkSurfaceProps& surfaceProps, const SkMatrix& deviceMatrix, + const SkPoint& textLocation, const sktext::gpu::SDFTControl& control) { + // Add filter to the paint which creates the SDFT data for A8 masks. + SkPaint dfPaint{paint}; + dfPaint.setMaskFilter(sktext::gpu::SDFMaskFilter::Make()); + + auto [dfFont, strikeToSourceScale, matrixRange] = control.getSDFFont(font, deviceMatrix, + textLocation); + + // Adjust the stroke width by the scale factor for drawing the SDFT. + dfPaint.setStrokeWidth(paint.getStrokeWidth() / strikeToSourceScale); + + // Check for dashing and adjust the intervals. + if (SkPathEffect* pathEffect = paint.getPathEffect(); pathEffect != nullptr) { + SkPathEffect::DashInfo dashInfo; + if (pathEffect->asADash(&dashInfo) == SkPathEffect::kDash_DashType) { + if (dashInfo.fCount > 0) { + // Allocate the intervals. + std::vector scaledIntervals(dashInfo.fCount); + dashInfo.fIntervals = scaledIntervals.data(); + // Call again to get the interval data. + (void)pathEffect->asADash(&dashInfo); + for (SkScalar& interval : scaledIntervals) { + interval /= strikeToSourceScale; + } + auto scaledDashes = SkDashPathEffect::Make(scaledIntervals.data(), + scaledIntervals.size(), + dashInfo.fPhase / strikeToSourceScale); + dfPaint.setPathEffect(scaledDashes); + } + } + } + + // Fake-gamma and subpixel antialiasing are applied in the shader, so we ignore the + // passed-in scaler context flags. (It's only used when we fall-back to bitmap text). + SkScalerContextFlags flags = SkScalerContextFlags::kNone; + SkStrikeSpec strikeSpec(dfFont, dfPaint, surfaceProps, flags, SkMatrix::I()); + + return std::make_tuple(std::move(strikeSpec), strikeToSourceScale, matrixRange); +} +#endif + +SkStrikeSpec::SkStrikeSpec(const SkFont& font, const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix) { + SkScalerContextEffects effects; + + SkScalerContext::CreateDescriptorAndEffectsUsingPaint( + font, paint, surfaceProps, scalerContextFlags, deviceMatrix, + &fAutoDescriptor, &effects); + + fMaskFilter = sk_ref_sp(effects.fMaskFilter); + fPathEffect = sk_ref_sp(effects.fPathEffect); + fTypeface = font.refTypefaceOrDefault(); +} + +sk_sp SkStrikeSpec::findOrCreateScopedStrike( + sktext::StrikeForGPUCacheInterface* cache) const { + return cache->findOrCreateScopedStrike(*this); +} + +sk_sp SkStrikeSpec::findOrCreateStrike() const { + SkScalerContextEffects effects{fPathEffect.get(), fMaskFilter.get()}; + return SkStrikeCache::GlobalStrikeCache()->findOrCreateStrike(*this); +} + +sk_sp SkStrikeSpec::findOrCreateStrike(SkStrikeCache* cache) const { + SkScalerContextEffects effects{fPathEffect.get(), fMaskFilter.get()}; + return cache->findOrCreateStrike(*this); +} + +SkBulkGlyphMetrics::SkBulkGlyphMetrics(const SkStrikeSpec& spec) + : fStrike{spec.findOrCreateStrike()} { } + +SkSpan SkBulkGlyphMetrics::glyphs(SkSpan glyphIDs) { + fGlyphs.reset(glyphIDs.size()); + return fStrike->metrics(glyphIDs, fGlyphs.get()); +} + +const SkGlyph* SkBulkGlyphMetrics::glyph(SkGlyphID glyphID) { + return this->glyphs(SkSpan{&glyphID, 1})[0]; +} + +SkBulkGlyphMetricsAndPaths::SkBulkGlyphMetricsAndPaths(const SkStrikeSpec& spec) + : fStrike{spec.findOrCreateStrike()} { } + +SkBulkGlyphMetricsAndPaths::SkBulkGlyphMetricsAndPaths(sk_sp&& strike) + : fStrike{std::move(strike)} { } + +SkBulkGlyphMetricsAndPaths::~SkBulkGlyphMetricsAndPaths() = default; + +SkSpan SkBulkGlyphMetricsAndPaths::glyphs(SkSpan glyphIDs) { + fGlyphs.reset(glyphIDs.size()); + return fStrike->preparePaths(glyphIDs, fGlyphs.get()); +} + +const SkGlyph* SkBulkGlyphMetricsAndPaths::glyph(SkGlyphID glyphID) { + return this->glyphs(SkSpan{&glyphID, 1})[0]; +} + +void SkBulkGlyphMetricsAndPaths::findIntercepts( + const SkScalar* bounds, SkScalar scale, SkScalar xPos, + const SkGlyph* glyph, SkScalar* array, int* count) { + // TODO(herb): remove this abominable const_cast. Do the intercepts really need to be on the + // glyph? + fStrike->findIntercepts(bounds, scale, xPos, const_cast(glyph), array, count); +} + +SkBulkGlyphMetricsAndDrawables::SkBulkGlyphMetricsAndDrawables(const SkStrikeSpec& spec) + : fStrike{spec.findOrCreateStrike()} { } + +SkBulkGlyphMetricsAndDrawables::SkBulkGlyphMetricsAndDrawables(sk_sp&& strike) + : fStrike{std::move(strike)} { } + +SkBulkGlyphMetricsAndDrawables::~SkBulkGlyphMetricsAndDrawables() = default; + +SkSpan SkBulkGlyphMetricsAndDrawables::glyphs(SkSpan glyphIDs) { + fGlyphs.reset(glyphIDs.size()); + return fStrike->prepareDrawables(glyphIDs, fGlyphs.get()); +} + +const SkGlyph* SkBulkGlyphMetricsAndDrawables::glyph(SkGlyphID glyphID) { + return this->glyphs(SkSpan{&glyphID, 1})[0]; +} + +SkBulkGlyphMetricsAndImages::SkBulkGlyphMetricsAndImages(const SkStrikeSpec& spec) + : fStrike{spec.findOrCreateStrike()} { } + +SkBulkGlyphMetricsAndImages::SkBulkGlyphMetricsAndImages(sk_sp&& strike) + : fStrike{std::move(strike)} { } + +SkBulkGlyphMetricsAndImages::~SkBulkGlyphMetricsAndImages() = default; + +SkSpan SkBulkGlyphMetricsAndImages::glyphs(SkSpan glyphIDs) { + fGlyphs.reset(glyphIDs.size()); + return fStrike->prepareImages(glyphIDs, fGlyphs.get()); +} + +const SkGlyph* SkBulkGlyphMetricsAndImages::glyph(SkPackedGlyphID packedID) { + return this->glyphs(SkSpan{&packedID, 1})[0]; +} + +const SkDescriptor& SkBulkGlyphMetricsAndImages::descriptor() const { + return fStrike->getDescriptor(); +} diff --git a/gfx/skia/skia/src/core/SkStrikeSpec.h b/gfx/skia/skia/src/core/SkStrikeSpec.h new file mode 100644 index 0000000000..dac2a5c0cf --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrikeSpec.h @@ -0,0 +1,178 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStrikeSpec_DEFINED +#define SkStrikeSpec_DEFINED + +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkSpan.h" +#include "src/core/SkDescriptor.h" +#include "src/text/StrikeForGPU.h" + +#include + +#if defined(SK_GANESH) || defined(SK_GRAPHITE) +#include "src/text/gpu/SDFTControl.h" + +namespace sktext::gpu { +class StrikeCache; +class TextStrike; +} +#endif + +class SkFont; +class SkPaint; +class SkStrike; +class SkStrikeCache; +class SkSurfaceProps; + +class SkStrikeSpec { +public: + SkStrikeSpec(const SkDescriptor& descriptor, sk_sp typeface); + SkStrikeSpec(const SkStrikeSpec&); + SkStrikeSpec& operator=(const SkStrikeSpec&) = delete; + + SkStrikeSpec(SkStrikeSpec&&); + SkStrikeSpec& operator=(SkStrikeSpec&&) = delete; + + ~SkStrikeSpec(); + + // Create a strike spec for mask style cache entries. + static SkStrikeSpec MakeMask( + const SkFont& font, + const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix); + + // A strike for finding the max size for transforming masks. This is used to calculate the + // maximum dimension of a SubRun of text. + static SkStrikeSpec MakeTransformMask( + const SkFont& font, + const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix); + + // Create a strike spec for path style cache entries. + static std::tuple MakePath( + const SkFont& font, + const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags); + + // Create a canonical strike spec for device-less measurements. + static std::tuple MakeCanonicalized( + const SkFont& font, const SkPaint* paint = nullptr); + + // Create a strike spec without a device, and does not switch over to path for large sizes. + static SkStrikeSpec MakeWithNoDevice(const SkFont& font, const SkPaint* paint = nullptr); + + // Make a strike spec for PDF Vector strikes + static SkStrikeSpec MakePDFVector(const SkTypeface& typeface, int* size); + +#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) && !defined(SK_DISABLE_SDF_TEXT) + // Create a strike spec for scaled distance field text. + static std::tuple MakeSDFT( + const SkFont& font, + const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + const SkMatrix& deviceMatrix, + const SkPoint& textLocation, + const sktext::gpu::SDFTControl& control); +#endif + + sk_sp findOrCreateScopedStrike( + sktext::StrikeForGPUCacheInterface* cache) const; + + sk_sp findOrCreateStrike() const; + + sk_sp findOrCreateStrike(SkStrikeCache* cache) const; + + std::unique_ptr createScalerContext() const { + SkScalerContextEffects effects{fPathEffect.get(), fMaskFilter.get()}; + return fTypeface->createScalerContext(effects, fAutoDescriptor.getDesc()); + } + + const SkDescriptor& descriptor() const { return *fAutoDescriptor.getDesc(); } + const SkTypeface& typeface() const { return *fTypeface; } + static bool ShouldDrawAsPath(const SkPaint& paint, const SkFont& font, const SkMatrix& matrix); + SkString dump() const; + +private: + SkStrikeSpec( + const SkFont& font, + const SkPaint& paint, + const SkSurfaceProps& surfaceProps, + SkScalerContextFlags scalerContextFlags, + const SkMatrix& deviceMatrix); + + SkAutoDescriptor fAutoDescriptor; + sk_sp fMaskFilter{nullptr}; + sk_sp fPathEffect{nullptr}; + sk_sp fTypeface; +}; + +class SkBulkGlyphMetrics { +public: + explicit SkBulkGlyphMetrics(const SkStrikeSpec& spec); + SkSpan glyphs(SkSpan glyphIDs); + const SkGlyph* glyph(SkGlyphID glyphID); + +private: + inline static constexpr int kTypicalGlyphCount = 20; + skia_private::AutoSTArray fGlyphs; + sk_sp fStrike; +}; + +class SkBulkGlyphMetricsAndPaths { +public: + explicit SkBulkGlyphMetricsAndPaths(const SkStrikeSpec& spec); + explicit SkBulkGlyphMetricsAndPaths(sk_sp&& strike); + ~SkBulkGlyphMetricsAndPaths(); + SkSpan glyphs(SkSpan glyphIDs); + const SkGlyph* glyph(SkGlyphID glyphID); + void findIntercepts(const SkScalar bounds[2], SkScalar scale, SkScalar xPos, + const SkGlyph* glyph, SkScalar* array, int* count); + +private: + inline static constexpr int kTypicalGlyphCount = 20; + skia_private::AutoSTArray fGlyphs; + sk_sp fStrike; +}; + +class SkBulkGlyphMetricsAndDrawables { +public: + explicit SkBulkGlyphMetricsAndDrawables(const SkStrikeSpec& spec); + explicit SkBulkGlyphMetricsAndDrawables(sk_sp&& strike); + ~SkBulkGlyphMetricsAndDrawables(); + SkSpan glyphs(SkSpan glyphIDs); + const SkGlyph* glyph(SkGlyphID glyphID); + +private: + inline static constexpr int kTypicalGlyphCount = 20; + skia_private::AutoSTArray fGlyphs; + sk_sp fStrike; +}; + +class SkBulkGlyphMetricsAndImages { +public: + explicit SkBulkGlyphMetricsAndImages(const SkStrikeSpec& spec); + explicit SkBulkGlyphMetricsAndImages(sk_sp&& strike); + ~SkBulkGlyphMetricsAndImages(); + SkSpan glyphs(SkSpan packedIDs); + const SkGlyph* glyph(SkPackedGlyphID packedID); + const SkDescriptor& descriptor() const; + +private: + inline static constexpr int kTypicalGlyphCount = 64; + skia_private::AutoSTArray fGlyphs; + sk_sp fStrike; +}; + +#endif // SkStrikeSpec_DEFINED diff --git a/gfx/skia/skia/src/core/SkString.cpp b/gfx/skia/skia/src/core/SkString.cpp new file mode 100644 index 0000000000..64ef678469 --- /dev/null +++ b/gfx/skia/skia/src/core/SkString.cpp @@ -0,0 +1,630 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkString.h" + +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" +#include "src/base/SkUTF.h" +#include "src/base/SkUtils.h" + +#include +#include +#include +#include +#include +#include + +// number of bytes (on the stack) to receive the printf result +static const size_t kBufferSize = 1024; + +struct StringBuffer { + char* fText; + int fLength; +}; + +template +static StringBuffer apply_format_string(const char* format, va_list args, char (&stackBuffer)[SIZE], + SkString* heapBuffer) SK_PRINTF_LIKE(1, 0); + +template +static StringBuffer apply_format_string(const char* format, va_list args, char (&stackBuffer)[SIZE], + SkString* heapBuffer) { + // First, attempt to print directly to the stack buffer. + va_list argsCopy; + va_copy(argsCopy, args); + int outLength = std::vsnprintf(stackBuffer, SIZE, format, args); + if (outLength < 0) { + SkDebugf("SkString: vsnprintf reported error."); + va_end(argsCopy); + return {stackBuffer, 0}; + } + if (outLength < SIZE) { + va_end(argsCopy); + return {stackBuffer, outLength}; + } + + // Our text was too long to fit on the stack! However, we now know how much space we need to + // format it. Format the string into our heap buffer. `set` automatically reserves an extra + // byte at the end of the buffer for a null terminator, so we don't need to add one here. + heapBuffer->set(nullptr, outLength); + char* heapBufferDest = heapBuffer->data(); + SkDEBUGCODE(int checkLength =) std::vsnprintf(heapBufferDest, outLength + 1, format, argsCopy); + SkASSERT(checkLength == outLength); + va_end(argsCopy); + return {heapBufferDest, outLength}; +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkStrEndsWith(const char string[], const char suffixStr[]) { + SkASSERT(string); + SkASSERT(suffixStr); + size_t strLen = strlen(string); + size_t suffixLen = strlen(suffixStr); + return strLen >= suffixLen && + !strncmp(string + strLen - suffixLen, suffixStr, suffixLen); +} + +bool SkStrEndsWith(const char string[], const char suffixChar) { + SkASSERT(string); + size_t strLen = strlen(string); + if (0 == strLen) { + return false; + } else { + return (suffixChar == string[strLen-1]); + } +} + +int SkStrStartsWithOneOf(const char string[], const char prefixes[]) { + int index = 0; + do { + const char* limit = strchr(prefixes, '\0'); + if (!strncmp(string, prefixes, limit - prefixes)) { + return index; + } + prefixes = limit + 1; + index++; + } while (prefixes[0]); + return -1; +} + +char* SkStrAppendU32(char string[], uint32_t dec) { + SkDEBUGCODE(char* start = string;) + + char buffer[kSkStrAppendU32_MaxSize]; + char* p = buffer + sizeof(buffer); + + do { + *--p = SkToU8('0' + dec % 10); + dec /= 10; + } while (dec != 0); + + SkASSERT(p >= buffer); + size_t cp_len = buffer + sizeof(buffer) - p; + memcpy(string, p, cp_len); + string += cp_len; + + SkASSERT(string - start <= kSkStrAppendU32_MaxSize); + return string; +} + +char* SkStrAppendS32(char string[], int32_t dec) { + uint32_t udec = dec; + if (dec < 0) { + *string++ = '-'; + udec = ~udec + 1; // udec = -udec, but silences some warnings that are trying to be helpful + } + return SkStrAppendU32(string, udec); +} + +char* SkStrAppendU64(char string[], uint64_t dec, int minDigits) { + SkDEBUGCODE(char* start = string;) + + char buffer[kSkStrAppendU64_MaxSize]; + char* p = buffer + sizeof(buffer); + + do { + *--p = SkToU8('0' + (int32_t) (dec % 10)); + dec /= 10; + minDigits--; + } while (dec != 0); + + while (minDigits > 0) { + *--p = '0'; + minDigits--; + } + + SkASSERT(p >= buffer); + size_t cp_len = buffer + sizeof(buffer) - p; + memcpy(string, p, cp_len); + string += cp_len; + + SkASSERT(string - start <= kSkStrAppendU64_MaxSize); + return string; +} + +char* SkStrAppendS64(char string[], int64_t dec, int minDigits) { + uint64_t udec = dec; + if (dec < 0) { + *string++ = '-'; + udec = ~udec + 1; // udec = -udec, but silences some warnings that are trying to be helpful + } + return SkStrAppendU64(string, udec, minDigits); +} + +char* SkStrAppendScalar(char string[], SkScalar value) { + // Handle infinity and NaN ourselves to ensure consistent cross-platform results. + // (e.g.: `inf` versus `1.#INF00`, `nan` versus `-nan` for high-bit-set NaNs) + if (SkScalarIsNaN(value)) { + strcpy(string, "nan"); + return string + 3; + } + if (!SkScalarIsFinite(value)) { + if (value > 0) { + strcpy(string, "inf"); + return string + 3; + } else { + strcpy(string, "-inf"); + return string + 4; + } + } + + // since floats have at most 8 significant digits, we limit our %g to that. + static const char gFormat[] = "%.8g"; + // make it 1 larger for the terminating 0 + char buffer[kSkStrAppendScalar_MaxSize + 1]; + int len = snprintf(buffer, sizeof(buffer), gFormat, value); + memcpy(string, buffer, len); + SkASSERT(len <= kSkStrAppendScalar_MaxSize); + return string + len; +} + +/////////////////////////////////////////////////////////////////////////////// + +const SkString::Rec SkString::gEmptyRec(0, 0); + +#define SizeOfRec() (gEmptyRec.data() - (const char*)&gEmptyRec) + +static uint32_t trim_size_t_to_u32(size_t value) { + if (sizeof(size_t) > sizeof(uint32_t)) { + if (value > UINT32_MAX) { + value = UINT32_MAX; + } + } + return (uint32_t)value; +} + +static size_t check_add32(size_t base, size_t extra) { + SkASSERT(base <= UINT32_MAX); + if (sizeof(size_t) > sizeof(uint32_t)) { + if (base + extra > UINT32_MAX) { + extra = UINT32_MAX - base; + } + } + return extra; +} + +sk_sp SkString::Rec::Make(const char text[], size_t len) { + if (0 == len) { + return sk_sp(const_cast(&gEmptyRec)); + } + + SkSafeMath safe; + // We store a 32bit version of the length + uint32_t stringLen = safe.castTo(len); + // Add SizeOfRec() for our overhead and 1 for null-termination + size_t allocationSize = safe.add(len, SizeOfRec() + sizeof(char)); + // Align up to a multiple of 4 + allocationSize = safe.alignUp(allocationSize, 4); + + SkASSERT_RELEASE(safe.ok()); + + void* storage = ::operator new (allocationSize); + sk_sp rec(new (storage) Rec(stringLen, 1)); + if (text) { + memcpy(rec->data(), text, len); + } + rec->data()[len] = 0; + return rec; +} + +void SkString::Rec::ref() const { + if (this == &SkString::gEmptyRec) { + return; + } + SkAssertResult(this->fRefCnt.fetch_add(+1, std::memory_order_relaxed)); +} + +void SkString::Rec::unref() const { + if (this == &SkString::gEmptyRec) { + return; + } + int32_t oldRefCnt = this->fRefCnt.fetch_add(-1, std::memory_order_acq_rel); + SkASSERT(oldRefCnt); + if (1 == oldRefCnt) { + delete this; + } +} + +bool SkString::Rec::unique() const { + return fRefCnt.load(std::memory_order_acquire) == 1; +} + +#ifdef SK_DEBUG +int32_t SkString::Rec::getRefCnt() const { + return fRefCnt.load(std::memory_order_relaxed); +} + +const SkString& SkString::validate() const { + // make sure no one has written over our global + SkASSERT(0 == gEmptyRec.fLength); + SkASSERT(0 == gEmptyRec.getRefCnt()); + SkASSERT(0 == gEmptyRec.data()[0]); + + if (fRec.get() != &gEmptyRec) { + SkASSERT(fRec->fLength > 0); + SkASSERT(fRec->getRefCnt() > 0); + SkASSERT(0 == fRec->data()[fRec->fLength]); + } + return *this; +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +SkString::SkString() : fRec(const_cast(&gEmptyRec)) { +} + +SkString::SkString(size_t len) { + fRec = Rec::Make(nullptr, len); +} + +SkString::SkString(const char text[]) { + size_t len = text ? strlen(text) : 0; + + fRec = Rec::Make(text, len); +} + +SkString::SkString(const char text[], size_t len) { + fRec = Rec::Make(text, len); +} + +SkString::SkString(const SkString& src) : fRec(src.validate().fRec) {} + +SkString::SkString(SkString&& src) : fRec(std::move(src.validate().fRec)) { + src.fRec.reset(const_cast(&gEmptyRec)); +} + +SkString::SkString(const std::string& src) { + fRec = Rec::Make(src.c_str(), src.size()); +} + +SkString::SkString(std::string_view src) { + fRec = Rec::Make(src.data(), src.length()); +} + +SkString::~SkString() { + this->validate(); +} + +bool SkString::equals(const SkString& src) const { + return fRec == src.fRec || this->equals(src.c_str(), src.size()); +} + +bool SkString::equals(const char text[]) const { + return this->equals(text, text ? strlen(text) : 0); +} + +bool SkString::equals(const char text[], size_t len) const { + SkASSERT(len == 0 || text != nullptr); + + return fRec->fLength == len && !sk_careful_memcmp(fRec->data(), text, len); +} + +SkString& SkString::operator=(const SkString& src) { + this->validate(); + fRec = src.fRec; // sk_sp::operator=(const sk_sp&) checks for self-assignment. + return *this; +} + +SkString& SkString::operator=(SkString&& src) { + this->validate(); + + if (fRec != src.fRec) { + this->swap(src); + } + return *this; +} + +SkString& SkString::operator=(const char text[]) { + this->validate(); + return *this = SkString(text); +} + +void SkString::reset() { + this->validate(); + fRec.reset(const_cast(&gEmptyRec)); +} + +char* SkString::data() { + this->validate(); + + if (fRec->fLength) { + if (!fRec->unique()) { + fRec = Rec::Make(fRec->data(), fRec->fLength); + } + } + return fRec->data(); +} + +void SkString::resize(size_t len) { + len = trim_size_t_to_u32(len); + if (0 == len) { + this->reset(); + } else if (fRec->unique() && ((len >> 2) <= (fRec->fLength >> 2))) { + // Use less of the buffer we have without allocating a smaller one. + char* p = this->data(); + p[len] = '\0'; + fRec->fLength = SkToU32(len); + } else { + SkString newString(len); + char* dest = newString.data(); + int copyLen = std::min(len, this->size()); + memcpy(dest, this->c_str(), copyLen); + dest[copyLen] = '\0'; + this->swap(newString); + } +} + +void SkString::set(const char text[]) { + this->set(text, text ? strlen(text) : 0); +} + +void SkString::set(const char text[], size_t len) { + len = trim_size_t_to_u32(len); + if (0 == len) { + this->reset(); + } else if (fRec->unique() && ((len >> 2) <= (fRec->fLength >> 2))) { + // Use less of the buffer we have without allocating a smaller one. + char* p = this->data(); + if (text) { + memcpy(p, text, len); + } + p[len] = '\0'; + fRec->fLength = SkToU32(len); + } else { + SkString tmp(text, len); + this->swap(tmp); + } +} + +void SkString::insert(size_t offset, const char text[]) { + this->insert(offset, text, text ? strlen(text) : 0); +} + +void SkString::insert(size_t offset, const char text[], size_t len) { + if (len) { + size_t length = fRec->fLength; + if (offset > length) { + offset = length; + } + + // Check if length + len exceeds 32bits, we trim len + len = check_add32(length, len); + if (0 == len) { + return; + } + + /* If we're the only owner, and we have room in our allocation for the insert, + do it in place, rather than allocating a new buffer. + + To know we have room, compare the allocated sizes + beforeAlloc = SkAlign4(length + 1) + afterAlloc = SkAligh4(length + 1 + len) + but SkAlign4(x) is (x + 3) >> 2 << 2 + which is equivalent for testing to (length + 1 + 3) >> 2 == (length + 1 + 3 + len) >> 2 + and we can then eliminate the +1+3 since that doesn't affec the answer + */ + if (fRec->unique() && (length >> 2) == ((length + len) >> 2)) { + char* dst = this->data(); + + if (offset < length) { + memmove(dst + offset + len, dst + offset, length - offset); + } + memcpy(dst + offset, text, len); + + dst[length + len] = 0; + fRec->fLength = SkToU32(length + len); + } else { + /* Seems we should use realloc here, since that is safe if it fails + (we have the original data), and might be faster than alloc/copy/free. + */ + SkString tmp(fRec->fLength + len); + char* dst = tmp.data(); + + if (offset > 0) { + memcpy(dst, fRec->data(), offset); + } + memcpy(dst + offset, text, len); + if (offset < fRec->fLength) { + memcpy(dst + offset + len, fRec->data() + offset, + fRec->fLength - offset); + } + + this->swap(tmp); + } + } +} + +void SkString::insertUnichar(size_t offset, SkUnichar uni) { + char buffer[SkUTF::kMaxBytesInUTF8Sequence]; + size_t len = SkUTF::ToUTF8(uni, buffer); + + if (len) { + this->insert(offset, buffer, len); + } +} + +void SkString::insertS32(size_t offset, int32_t dec) { + char buffer[kSkStrAppendS32_MaxSize]; + char* stop = SkStrAppendS32(buffer, dec); + this->insert(offset, buffer, stop - buffer); +} + +void SkString::insertS64(size_t offset, int64_t dec, int minDigits) { + char buffer[kSkStrAppendS64_MaxSize]; + char* stop = SkStrAppendS64(buffer, dec, minDigits); + this->insert(offset, buffer, stop - buffer); +} + +void SkString::insertU32(size_t offset, uint32_t dec) { + char buffer[kSkStrAppendU32_MaxSize]; + char* stop = SkStrAppendU32(buffer, dec); + this->insert(offset, buffer, stop - buffer); +} + +void SkString::insertU64(size_t offset, uint64_t dec, int minDigits) { + char buffer[kSkStrAppendU64_MaxSize]; + char* stop = SkStrAppendU64(buffer, dec, minDigits); + this->insert(offset, buffer, stop - buffer); +} + +void SkString::insertHex(size_t offset, uint32_t hex, int minDigits) { + minDigits = SkTPin(minDigits, 0, 8); + + char buffer[8]; + char* p = buffer + sizeof(buffer); + + do { + *--p = SkHexadecimalDigits::gUpper[hex & 0xF]; + hex >>= 4; + minDigits -= 1; + } while (hex != 0); + + while (--minDigits >= 0) { + *--p = '0'; + } + + SkASSERT(p >= buffer); + this->insert(offset, p, buffer + sizeof(buffer) - p); +} + +void SkString::insertScalar(size_t offset, SkScalar value) { + char buffer[kSkStrAppendScalar_MaxSize]; + char* stop = SkStrAppendScalar(buffer, value); + this->insert(offset, buffer, stop - buffer); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkString::printf(const char format[], ...) { + va_list args; + va_start(args, format); + this->printVAList(format, args); + va_end(args); +} + +void SkString::printVAList(const char format[], va_list args) { + char stackBuffer[kBufferSize]; + StringBuffer result = apply_format_string(format, args, stackBuffer, this); + + if (result.fText == stackBuffer) { + this->set(result.fText, result.fLength); + } +} + +void SkString::appendf(const char format[], ...) { + va_list args; + va_start(args, format); + this->appendVAList(format, args); + va_end(args); +} + +void SkString::appendVAList(const char format[], va_list args) { + if (this->isEmpty()) { + this->printVAList(format, args); + return; + } + + SkString overflow; + char stackBuffer[kBufferSize]; + StringBuffer result = apply_format_string(format, args, stackBuffer, &overflow); + + this->append(result.fText, result.fLength); +} + +void SkString::prependf(const char format[], ...) { + va_list args; + va_start(args, format); + this->prependVAList(format, args); + va_end(args); +} + +void SkString::prependVAList(const char format[], va_list args) { + if (this->isEmpty()) { + this->printVAList(format, args); + return; + } + + SkString overflow; + char stackBuffer[kBufferSize]; + StringBuffer result = apply_format_string(format, args, stackBuffer, &overflow); + + this->prepend(result.fText, result.fLength); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkString::remove(size_t offset, size_t length) { + size_t size = this->size(); + + if (offset < size) { + if (length > size - offset) { + length = size - offset; + } + SkASSERT(length <= size); + SkASSERT(offset <= size - length); + if (length > 0) { + SkString tmp(size - length); + char* dst = tmp.data(); + const char* src = this->c_str(); + + if (offset) { + memcpy(dst, src, offset); + } + size_t tail = size - (offset + length); + if (tail) { + memcpy(dst + offset, src + (offset + length), tail); + } + SkASSERT(dst[tmp.size()] == 0); + this->swap(tmp); + } + } +} + +void SkString::swap(SkString& other) { + this->validate(); + other.validate(); + + using std::swap; + swap(fRec, other.fRec); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkString SkStringPrintf(const char* format, ...) { + SkString formattedOutput; + va_list args; + va_start(args, format); + formattedOutput.printVAList(format, args); + va_end(args); + return formattedOutput; +} diff --git a/gfx/skia/skia/src/core/SkStringUtils.cpp b/gfx/skia/skia/src/core/SkStringUtils.cpp new file mode 100644 index 0000000000..cfbe7d5563 --- /dev/null +++ b/gfx/skia/skia/src/core/SkStringUtils.cpp @@ -0,0 +1,115 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkString.h" +#include "include/private/base/SkTArray.h" +#include "src/base/SkUTF.h" +#include "src/core/SkStringUtils.h" + +void SkAppendScalar(SkString* str, SkScalar value, SkScalarAsStringType asType) { + switch (asType) { + case kHex_SkScalarAsStringType: + str->appendf("SkBits2Float(0x%08x)", SkFloat2Bits(value)); + break; + case kDec_SkScalarAsStringType: { + SkString tmp; + tmp.printf("%.9g", value); + if (tmp.contains('.')) { + tmp.appendUnichar('f'); + } + str->append(tmp); + break; + } + } +} + +SkString SkTabString(const SkString& string, int tabCnt) { + if (tabCnt <= 0) { + return string; + } + SkString tabs; + for (int i = 0; i < tabCnt; ++i) { + tabs.append("\t"); + } + SkString result; + static const char newline[] = "\n"; + const char* input = string.c_str(); + int nextNL = SkStrFind(input, newline); + while (nextNL >= 0) { + if (nextNL > 0) { + result.append(tabs); + } + result.append(input, nextNL + 1); + input += nextNL + 1; + nextNL = SkStrFind(input, newline); + } + if (*input != '\0') { + result.append(tabs); + result.append(input); + } + return result; +} + +SkString SkStringFromUTF16(const uint16_t* src, size_t count) { + SkString ret; + const uint16_t* stop = src + count; + if (count > 0) { + SkASSERT(src); + size_t n = 0; + const uint16_t* end = src + count; + for (const uint16_t* ptr = src; ptr < end;) { + const uint16_t* last = ptr; + SkUnichar u = SkUTF::NextUTF16(&ptr, stop); + size_t s = SkUTF::ToUTF8(u); + if (n > UINT32_MAX - s) { + end = last; // truncate input string + break; + } + n += s; + } + ret = SkString(n); + char* out = ret.data(); + for (const uint16_t* ptr = src; ptr < end;) { + out += SkUTF::ToUTF8(SkUTF::NextUTF16(&ptr, stop), out); + } + SkASSERT(out == ret.data() + n); + } + return ret; +} + +void SkStrSplit(const char* str, + const char* delimiters, + SkStrSplitMode splitMode, + SkTArray* out) { + if (splitMode == kCoalesce_SkStrSplitMode) { + // Skip any delimiters. + str += strspn(str, delimiters); + } + if (!*str) { + return; + } + + while (true) { + // Find a token. + const size_t len = strcspn(str, delimiters); + if (splitMode == kStrict_SkStrSplitMode || len > 0) { + out->push_back().set(str, len); + str += len; + } + + if (!*str) { + return; + } + if (splitMode == kCoalesce_SkStrSplitMode) { + // Skip any delimiters. + str += strspn(str, delimiters); + } else { + // Skip one delimiter. + str += 1; + } + } +} diff --git a/gfx/skia/skia/src/core/SkStringUtils.h b/gfx/skia/skia/src/core/SkStringUtils.h new file mode 100644 index 0000000000..1101b551de --- /dev/null +++ b/gfx/skia/skia/src/core/SkStringUtils.h @@ -0,0 +1,62 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStringUtils_DEFINED +#define SkStringUtils_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/private/base/SkTArray.h" + +enum SkScalarAsStringType { + kDec_SkScalarAsStringType, + kHex_SkScalarAsStringType, +}; + +void SkAppendScalar(SkString*, SkScalar, SkScalarAsStringType); + +static inline void SkAppendScalarDec(SkString* str, SkScalar value) { + SkAppendScalar(str, value, kDec_SkScalarAsStringType); +} + +static inline void SkAppendScalarHex(SkString* str, SkScalar value) { + SkAppendScalar(str, value, kHex_SkScalarAsStringType); +} + +/** Indents every non-empty line of the string by tabCnt tabs */ +SkString SkTabString(const SkString& string, int tabCnt); + +SkString SkStringFromUTF16(const uint16_t* src, size_t count); + +#if defined(SK_BUILD_FOR_WIN) + #define SK_strcasecmp _stricmp +#else + #define SK_strcasecmp strcasecmp +#endif + +enum SkStrSplitMode { + // Strictly return all results. If the input is ",," and the separator is ',' this will return + // an array of three empty strings. + kStrict_SkStrSplitMode, + + // Only nonempty results will be added to the results. Multiple separators will be + // coalesced. Separators at the beginning and end of the input will be ignored. If the input is + // ",," and the separator is ',', this will return an empty vector. + kCoalesce_SkStrSplitMode +}; + +// Split str on any characters in delimiters into out. (strtok with a non-destructive API.) +void SkStrSplit(const char* str, + const char* delimiters, + SkStrSplitMode splitMode, + SkTArray* out); + +inline void SkStrSplit(const char* str, const char* delimiters, SkTArray* out) { + SkStrSplit(str, delimiters, kCoalesce_SkStrSplitMode, out); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkStroke.cpp b/gfx/skia/skia/src/core/SkStroke.cpp new file mode 100644 index 0000000000..94c1ea2e82 --- /dev/null +++ b/gfx/skia/skia/src/core/SkStroke.cpp @@ -0,0 +1,1618 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkStrokerPriv.h" + +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkPathPriv.h" +#include "src/core/SkPointPriv.h" + +#include + +enum { + kTangent_RecursiveLimit, + kCubic_RecursiveLimit, + kConic_RecursiveLimit, + kQuad_RecursiveLimit +}; + +// quads with extreme widths (e.g. (0,1) (1,6) (0,3) width=5e7) recurse to point of failure +// largest seen for normal cubics : 5, 26 +// largest seen for normal quads : 11 +// 3x limits seen in practice, except for cubics (3x limit would be ~75). +// For cubics, we never get close to 75 when running through dm. The limit of 24 +// was chosen because it's close to the peak in a count of cubic recursion depths visited +// (define DEBUG_CUBIC_RECURSION_DEPTHS) and no diffs were produced on gold when using it. +static const int kRecursiveLimits[] = { 5*3, 24, 11*3, 11*3 }; + +static_assert(0 == kTangent_RecursiveLimit, "cubic_stroke_relies_on_tangent_equalling_zero"); +static_assert(1 == kCubic_RecursiveLimit, "cubic_stroke_relies_on_cubic_equalling_one"); +static_assert(std::size(kRecursiveLimits) == kQuad_RecursiveLimit + 1, + "recursive_limits_mismatch"); + +#if defined SK_DEBUG && QUAD_STROKE_APPROX_EXTENDED_DEBUGGING + int gMaxRecursion[std::size(kRecursiveLimits)] = { 0 }; +#endif +#ifndef DEBUG_QUAD_STROKER + #define DEBUG_QUAD_STROKER 0 +#endif + +#if DEBUG_QUAD_STROKER + /* Enable to show the decisions made in subdividing the curve -- helpful when the resulting + stroke has more than the optimal number of quadratics and lines */ + #define STROKER_RESULT(resultType, depth, quadPts, format, ...) \ + SkDebugf("[%d] %s " format "\n", depth, __FUNCTION__, __VA_ARGS__), \ + SkDebugf(" " #resultType " t=(%g,%g)\n", quadPts->fStartT, quadPts->fEndT), \ + resultType + #define STROKER_DEBUG_PARAMS(...) , __VA_ARGS__ +#else + #define STROKER_RESULT(resultType, depth, quadPts, format, ...) \ + resultType + #define STROKER_DEBUG_PARAMS(...) +#endif + +#ifndef DEBUG_CUBIC_RECURSION_DEPTHS +#define DEBUG_CUBIC_RECURSION_DEPTHS 0 +#endif +#if DEBUG_CUBIC_RECURSION_DEPTHS + /* Prints a histogram of recursion depths at process termination. */ + static struct DepthHistogram { + inline static constexpr int kMaxDepth = 75; + int fCubicDepths[kMaxDepth + 1]; + + DepthHistogram() { memset(fCubicDepths, 0, sizeof(fCubicDepths)); } + + ~DepthHistogram() { + SkDebugf("# times recursion terminated per depth:\n"); + for (int i = 0; i <= kMaxDepth; i++) { + SkDebugf(" depth %d: %d\n", i, fCubicDepths[i]); + } + } + + inline void incDepth(int depth) { + SkASSERT(depth >= 0 && depth <= kMaxDepth); + fCubicDepths[depth]++; + } + } sCubicDepthHistogram; + +#define DEBUG_CUBIC_RECURSION_TRACK_DEPTH(depth) sCubicDepthHistogram.incDepth(depth) +#else +#define DEBUG_CUBIC_RECURSION_TRACK_DEPTH(depth) (void)(depth) +#endif + +static inline bool degenerate_vector(const SkVector& v) { + return !SkPointPriv::CanNormalize(v.fX, v.fY); +} + +static bool set_normal_unitnormal(const SkPoint& before, const SkPoint& after, SkScalar scale, + SkScalar radius, + SkVector* normal, SkVector* unitNormal) { + if (!unitNormal->setNormalize((after.fX - before.fX) * scale, + (after.fY - before.fY) * scale)) { + return false; + } + SkPointPriv::RotateCCW(unitNormal); + unitNormal->scale(radius, normal); + return true; +} + +static bool set_normal_unitnormal(const SkVector& vec, + SkScalar radius, + SkVector* normal, SkVector* unitNormal) { + if (!unitNormal->setNormalize(vec.fX, vec.fY)) { + return false; + } + SkPointPriv::RotateCCW(unitNormal); + unitNormal->scale(radius, normal); + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +struct SkQuadConstruct { // The state of the quad stroke under construction. + SkPoint fQuad[3]; // the stroked quad parallel to the original curve + SkPoint fTangentStart; // a point tangent to fQuad[0] + SkPoint fTangentEnd; // a point tangent to fQuad[2] + SkScalar fStartT; // a segment of the original curve + SkScalar fMidT; // " + SkScalar fEndT; // " + bool fStartSet; // state to share common points across structs + bool fEndSet; // " + bool fOppositeTangents; // set if coincident tangents have opposite directions + + // return false if start and end are too close to have a unique middle + bool init(SkScalar start, SkScalar end) { + fStartT = start; + fMidT = (start + end) * SK_ScalarHalf; + fEndT = end; + fStartSet = fEndSet = false; + return fStartT < fMidT && fMidT < fEndT; + } + + bool initWithStart(SkQuadConstruct* parent) { + if (!init(parent->fStartT, parent->fMidT)) { + return false; + } + fQuad[0] = parent->fQuad[0]; + fTangentStart = parent->fTangentStart; + fStartSet = true; + return true; + } + + bool initWithEnd(SkQuadConstruct* parent) { + if (!init(parent->fMidT, parent->fEndT)) { + return false; + } + fQuad[2] = parent->fQuad[2]; + fTangentEnd = parent->fTangentEnd; + fEndSet = true; + return true; + } +}; + +class SkPathStroker { +public: + SkPathStroker(const SkPath& src, + SkScalar radius, SkScalar miterLimit, SkPaint::Cap, + SkPaint::Join, SkScalar resScale, + bool canIgnoreCenter); + + bool hasOnlyMoveTo() const { return 0 == fSegmentCount; } + SkPoint moveToPt() const { return fFirstPt; } + + void moveTo(const SkPoint&); + void lineTo(const SkPoint&, const SkPath::Iter* iter = nullptr); + void quadTo(const SkPoint&, const SkPoint&); + void conicTo(const SkPoint&, const SkPoint&, SkScalar weight); + void cubicTo(const SkPoint&, const SkPoint&, const SkPoint&); + void close(bool isLine) { this->finishContour(true, isLine); } + + void done(SkPath* dst, bool isLine) { + this->finishContour(false, isLine); + dst->swap(fOuter); + } + + SkScalar getResScale() const { return fResScale; } + + bool isCurrentContourEmpty() const { + return fInner.isZeroLengthSincePoint(0) && + fOuter.isZeroLengthSincePoint(fFirstOuterPtIndexInContour); + } + +private: + SkScalar fRadius; + SkScalar fInvMiterLimit; + SkScalar fResScale; + SkScalar fInvResScale; + SkScalar fInvResScaleSquared; + + SkVector fFirstNormal, fPrevNormal, fFirstUnitNormal, fPrevUnitNormal; + SkPoint fFirstPt, fPrevPt; // on original path + SkPoint fFirstOuterPt; + int fFirstOuterPtIndexInContour; + int fSegmentCount; + bool fPrevIsLine; + bool fCanIgnoreCenter; + + SkStrokerPriv::CapProc fCapper; + SkStrokerPriv::JoinProc fJoiner; + + SkPath fInner, fOuter, fCusper; // outer is our working answer, inner is temp + + enum StrokeType { + kOuter_StrokeType = 1, // use sign-opposite values later to flip perpendicular axis + kInner_StrokeType = -1 + } fStrokeType; + + enum ResultType { + kSplit_ResultType, // the caller should split the quad stroke in two + kDegenerate_ResultType, // the caller should add a line + kQuad_ResultType, // the caller should (continue to try to) add a quad stroke + }; + + enum ReductionType { + kPoint_ReductionType, // all curve points are practically identical + kLine_ReductionType, // the control point is on the line between the ends + kQuad_ReductionType, // the control point is outside the line between the ends + kDegenerate_ReductionType, // the control point is on the line but outside the ends + kDegenerate2_ReductionType, // two control points are on the line but outside ends (cubic) + kDegenerate3_ReductionType, // three areas of max curvature found (for cubic) + }; + + enum IntersectRayType { + kCtrlPt_RayType, + kResultType_RayType, + }; + + int fRecursionDepth; // track stack depth to abort if numerics run amok + bool fFoundTangents; // do less work until tangents meet (cubic) + bool fJoinCompleted; // previous join was not degenerate + + void addDegenerateLine(const SkQuadConstruct* ); + static ReductionType CheckConicLinear(const SkConic& , SkPoint* reduction); + static ReductionType CheckCubicLinear(const SkPoint cubic[4], SkPoint reduction[3], + const SkPoint** tanPtPtr); + static ReductionType CheckQuadLinear(const SkPoint quad[3], SkPoint* reduction); + ResultType compareQuadConic(const SkConic& , SkQuadConstruct* ) const; + ResultType compareQuadCubic(const SkPoint cubic[4], SkQuadConstruct* ); + ResultType compareQuadQuad(const SkPoint quad[3], SkQuadConstruct* ); + void conicPerpRay(const SkConic& , SkScalar t, SkPoint* tPt, SkPoint* onPt, + SkPoint* tangent) const; + void conicQuadEnds(const SkConic& , SkQuadConstruct* ) const; + bool conicStroke(const SkConic& , SkQuadConstruct* ); + bool cubicMidOnLine(const SkPoint cubic[4], const SkQuadConstruct* ) const; + void cubicPerpRay(const SkPoint cubic[4], SkScalar t, SkPoint* tPt, SkPoint* onPt, + SkPoint* tangent) const; + void cubicQuadEnds(const SkPoint cubic[4], SkQuadConstruct* ); + void cubicQuadMid(const SkPoint cubic[4], const SkQuadConstruct* , SkPoint* mid) const; + bool cubicStroke(const SkPoint cubic[4], SkQuadConstruct* ); + void init(StrokeType strokeType, SkQuadConstruct* , SkScalar tStart, SkScalar tEnd); + ResultType intersectRay(SkQuadConstruct* , IntersectRayType STROKER_DEBUG_PARAMS(int) ) const; + bool ptInQuadBounds(const SkPoint quad[3], const SkPoint& pt) const; + void quadPerpRay(const SkPoint quad[3], SkScalar t, SkPoint* tPt, SkPoint* onPt, + SkPoint* tangent) const; + bool quadStroke(const SkPoint quad[3], SkQuadConstruct* ); + void setConicEndNormal(const SkConic& , + const SkVector& normalAB, const SkVector& unitNormalAB, + SkVector* normalBC, SkVector* unitNormalBC); + void setCubicEndNormal(const SkPoint cubic[4], + const SkVector& normalAB, const SkVector& unitNormalAB, + SkVector* normalCD, SkVector* unitNormalCD); + void setQuadEndNormal(const SkPoint quad[3], + const SkVector& normalAB, const SkVector& unitNormalAB, + SkVector* normalBC, SkVector* unitNormalBC); + void setRayPts(const SkPoint& tPt, SkVector* dxy, SkPoint* onPt, SkPoint* tangent) const; + static bool SlightAngle(SkQuadConstruct* ); + ResultType strokeCloseEnough(const SkPoint stroke[3], const SkPoint ray[2], + SkQuadConstruct* STROKER_DEBUG_PARAMS(int depth) ) const; + ResultType tangentsMeet(const SkPoint cubic[4], SkQuadConstruct* ); + + void finishContour(bool close, bool isLine); + bool preJoinTo(const SkPoint&, SkVector* normal, SkVector* unitNormal, + bool isLine); + void postJoinTo(const SkPoint&, const SkVector& normal, + const SkVector& unitNormal); + + void line_to(const SkPoint& currPt, const SkVector& normal); +}; + +/////////////////////////////////////////////////////////////////////////////// + +bool SkPathStroker::preJoinTo(const SkPoint& currPt, SkVector* normal, + SkVector* unitNormal, bool currIsLine) { + SkASSERT(fSegmentCount >= 0); + + SkScalar prevX = fPrevPt.fX; + SkScalar prevY = fPrevPt.fY; + + if (!set_normal_unitnormal(fPrevPt, currPt, fResScale, fRadius, normal, unitNormal)) { + if (SkStrokerPriv::CapFactory(SkPaint::kButt_Cap) == fCapper) { + return false; + } + /* Square caps and round caps draw even if the segment length is zero. + Since the zero length segment has no direction, set the orientation + to upright as the default orientation */ + normal->set(fRadius, 0); + unitNormal->set(1, 0); + } + + if (fSegmentCount == 0) { + fFirstNormal = *normal; + fFirstUnitNormal = *unitNormal; + fFirstOuterPt.set(prevX + normal->fX, prevY + normal->fY); + + fOuter.moveTo(fFirstOuterPt.fX, fFirstOuterPt.fY); + fInner.moveTo(prevX - normal->fX, prevY - normal->fY); + } else { // we have a previous segment + fJoiner(&fOuter, &fInner, fPrevUnitNormal, fPrevPt, *unitNormal, + fRadius, fInvMiterLimit, fPrevIsLine, currIsLine); + } + fPrevIsLine = currIsLine; + return true; +} + +void SkPathStroker::postJoinTo(const SkPoint& currPt, const SkVector& normal, + const SkVector& unitNormal) { + fJoinCompleted = true; + fPrevPt = currPt; + fPrevUnitNormal = unitNormal; + fPrevNormal = normal; + fSegmentCount += 1; +} + +void SkPathStroker::finishContour(bool close, bool currIsLine) { + if (fSegmentCount > 0) { + SkPoint pt; + + if (close) { + fJoiner(&fOuter, &fInner, fPrevUnitNormal, fPrevPt, + fFirstUnitNormal, fRadius, fInvMiterLimit, + fPrevIsLine, currIsLine); + fOuter.close(); + + if (fCanIgnoreCenter) { + // If we can ignore the center just make sure the larger of the two paths + // is preserved and don't add the smaller one. + if (fInner.getBounds().contains(fOuter.getBounds())) { + fInner.swap(fOuter); + } + } else { + // now add fInner as its own contour + fInner.getLastPt(&pt); + fOuter.moveTo(pt.fX, pt.fY); + fOuter.reversePathTo(fInner); + fOuter.close(); + } + } else { // add caps to start and end + // cap the end + fInner.getLastPt(&pt); + fCapper(&fOuter, fPrevPt, fPrevNormal, pt, + currIsLine ? &fInner : nullptr); + fOuter.reversePathTo(fInner); + // cap the start + fCapper(&fOuter, fFirstPt, -fFirstNormal, fFirstOuterPt, + fPrevIsLine ? &fInner : nullptr); + fOuter.close(); + } + if (!fCusper.isEmpty()) { + fOuter.addPath(fCusper); + fCusper.rewind(); + } + } + // since we may re-use fInner, we rewind instead of reset, to save on + // reallocating its internal storage. + fInner.rewind(); + fSegmentCount = -1; + fFirstOuterPtIndexInContour = fOuter.countPoints(); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkPathStroker::SkPathStroker(const SkPath& src, + SkScalar radius, SkScalar miterLimit, + SkPaint::Cap cap, SkPaint::Join join, SkScalar resScale, + bool canIgnoreCenter) + : fRadius(radius) + , fResScale(resScale) + , fCanIgnoreCenter(canIgnoreCenter) { + + /* This is only used when join is miter_join, but we initialize it here + so that it is always defined, to fis valgrind warnings. + */ + fInvMiterLimit = 0; + + if (join == SkPaint::kMiter_Join) { + if (miterLimit <= SK_Scalar1) { + join = SkPaint::kBevel_Join; + } else { + fInvMiterLimit = SkScalarInvert(miterLimit); + } + } + fCapper = SkStrokerPriv::CapFactory(cap); + fJoiner = SkStrokerPriv::JoinFactory(join); + fSegmentCount = -1; + fFirstOuterPtIndexInContour = 0; + fPrevIsLine = false; + + // Need some estimate of how large our final result (fOuter) + // and our per-contour temp (fInner) will be, so we don't spend + // extra time repeatedly growing these arrays. + // + // 3x for result == inner + outer + join (swag) + // 1x for inner == 'wag' (worst contour length would be better guess) + fOuter.incReserve(src.countPoints() * 3); + fOuter.setIsVolatile(true); + fInner.incReserve(src.countPoints()); + fInner.setIsVolatile(true); + // TODO : write a common error function used by stroking and filling + // The '4' below matches the fill scan converter's error term + fInvResScale = SkScalarInvert(resScale * 4); + fInvResScaleSquared = fInvResScale * fInvResScale; + fRecursionDepth = 0; +} + +void SkPathStroker::moveTo(const SkPoint& pt) { + if (fSegmentCount > 0) { + this->finishContour(false, false); + } + fSegmentCount = 0; + fFirstPt = fPrevPt = pt; + fJoinCompleted = false; +} + +void SkPathStroker::line_to(const SkPoint& currPt, const SkVector& normal) { + fOuter.lineTo(currPt.fX + normal.fX, currPt.fY + normal.fY); + fInner.lineTo(currPt.fX - normal.fX, currPt.fY - normal.fY); +} + +static bool has_valid_tangent(const SkPath::Iter* iter) { + SkPath::Iter copy = *iter; + SkPath::Verb verb; + SkPoint pts[4]; + while ((verb = copy.next(pts))) { + switch (verb) { + case SkPath::kMove_Verb: + return false; + case SkPath::kLine_Verb: + if (pts[0] == pts[1]) { + continue; + } + return true; + case SkPath::kQuad_Verb: + case SkPath::kConic_Verb: + if (pts[0] == pts[1] && pts[0] == pts[2]) { + continue; + } + return true; + case SkPath::kCubic_Verb: + if (pts[0] == pts[1] && pts[0] == pts[2] && pts[0] == pts[3]) { + continue; + } + return true; + case SkPath::kClose_Verb: + case SkPath::kDone_Verb: + return false; + } + } + return false; +} + +void SkPathStroker::lineTo(const SkPoint& currPt, const SkPath::Iter* iter) { + bool teenyLine = SkPointPriv::EqualsWithinTolerance(fPrevPt, currPt, SK_ScalarNearlyZero * fInvResScale); + if (SkStrokerPriv::CapFactory(SkPaint::kButt_Cap) == fCapper && teenyLine) { + return; + } + if (teenyLine && (fJoinCompleted || (iter && has_valid_tangent(iter)))) { + return; + } + SkVector normal, unitNormal; + + if (!this->preJoinTo(currPt, &normal, &unitNormal, true)) { + return; + } + this->line_to(currPt, normal); + this->postJoinTo(currPt, normal, unitNormal); +} + +void SkPathStroker::setQuadEndNormal(const SkPoint quad[3], const SkVector& normalAB, + const SkVector& unitNormalAB, SkVector* normalBC, SkVector* unitNormalBC) { + if (!set_normal_unitnormal(quad[1], quad[2], fResScale, fRadius, normalBC, unitNormalBC)) { + *normalBC = normalAB; + *unitNormalBC = unitNormalAB; + } +} + +void SkPathStroker::setConicEndNormal(const SkConic& conic, const SkVector& normalAB, + const SkVector& unitNormalAB, SkVector* normalBC, SkVector* unitNormalBC) { + setQuadEndNormal(conic.fPts, normalAB, unitNormalAB, normalBC, unitNormalBC); +} + +void SkPathStroker::setCubicEndNormal(const SkPoint cubic[4], const SkVector& normalAB, + const SkVector& unitNormalAB, SkVector* normalCD, SkVector* unitNormalCD) { + SkVector ab = cubic[1] - cubic[0]; + SkVector cd = cubic[3] - cubic[2]; + + bool degenerateAB = degenerate_vector(ab); + bool degenerateCD = degenerate_vector(cd); + + if (degenerateAB && degenerateCD) { + goto DEGENERATE_NORMAL; + } + + if (degenerateAB) { + ab = cubic[2] - cubic[0]; + degenerateAB = degenerate_vector(ab); + } + if (degenerateCD) { + cd = cubic[3] - cubic[1]; + degenerateCD = degenerate_vector(cd); + } + if (degenerateAB || degenerateCD) { +DEGENERATE_NORMAL: + *normalCD = normalAB; + *unitNormalCD = unitNormalAB; + return; + } + SkAssertResult(set_normal_unitnormal(cd, fRadius, normalCD, unitNormalCD)); +} + +void SkPathStroker::init(StrokeType strokeType, SkQuadConstruct* quadPts, SkScalar tStart, + SkScalar tEnd) { + fStrokeType = strokeType; + fFoundTangents = false; + quadPts->init(tStart, tEnd); +} + +// returns the distance squared from the point to the line +static SkScalar pt_to_line(const SkPoint& pt, const SkPoint& lineStart, const SkPoint& lineEnd) { + SkVector dxy = lineEnd - lineStart; + SkVector ab0 = pt - lineStart; + SkScalar numer = dxy.dot(ab0); + SkScalar denom = dxy.dot(dxy); + SkScalar t = sk_ieee_float_divide(numer, denom); + if (t >= 0 && t <= 1) { + SkPoint hit; + hit.fX = lineStart.fX * (1 - t) + lineEnd.fX * t; + hit.fY = lineStart.fY * (1 - t) + lineEnd.fY * t; + return SkPointPriv::DistanceToSqd(hit, pt); + } else { + return SkPointPriv::DistanceToSqd(pt, lineStart); + } +} + +/* Given a cubic, determine if all four points are in a line. + Return true if the inner points is close to a line connecting the outermost points. + + Find the outermost point by looking for the largest difference in X or Y. + Given the indices of the outermost points, and that outer_1 is greater than outer_2, + this table shows the index of the smaller of the remaining points: + + outer_2 + 0 1 2 3 + outer_1 ---------------- + 0 | - 2 1 1 + 1 | - - 0 0 + 2 | - - - 0 + 3 | - - - - + + If outer_1 == 0 and outer_2 == 1, the smaller of the remaining indices (2 and 3) is 2. + + This table can be collapsed to: (1 + (2 >> outer_2)) >> outer_1 + + Given three indices (outer_1 outer_2 mid_1) from 0..3, the remaining index is: + + mid_2 == (outer_1 ^ outer_2 ^ mid_1) + */ +static bool cubic_in_line(const SkPoint cubic[4]) { + SkScalar ptMax = -1; + int outer1 SK_INIT_TO_AVOID_WARNING; + int outer2 SK_INIT_TO_AVOID_WARNING; + for (int index = 0; index < 3; ++index) { + for (int inner = index + 1; inner < 4; ++inner) { + SkVector testDiff = cubic[inner] - cubic[index]; + SkScalar testMax = std::max(SkScalarAbs(testDiff.fX), SkScalarAbs(testDiff.fY)); + if (ptMax < testMax) { + outer1 = index; + outer2 = inner; + ptMax = testMax; + } + } + } + SkASSERT(outer1 >= 0 && outer1 <= 2); + SkASSERT(outer2 >= 1 && outer2 <= 3); + SkASSERT(outer1 < outer2); + int mid1 = (1 + (2 >> outer2)) >> outer1; + SkASSERT(mid1 >= 0 && mid1 <= 2); + SkASSERT(outer1 != mid1 && outer2 != mid1); + int mid2 = outer1 ^ outer2 ^ mid1; + SkASSERT(mid2 >= 1 && mid2 <= 3); + SkASSERT(mid2 != outer1 && mid2 != outer2 && mid2 != mid1); + SkASSERT(((1 << outer1) | (1 << outer2) | (1 << mid1) | (1 << mid2)) == 0x0f); + SkScalar lineSlop = ptMax * ptMax * 0.00001f; // this multiplier is pulled out of the air + return pt_to_line(cubic[mid1], cubic[outer1], cubic[outer2]) <= lineSlop + && pt_to_line(cubic[mid2], cubic[outer1], cubic[outer2]) <= lineSlop; +} + +/* Given quad, see if all there points are in a line. + Return true if the inside point is close to a line connecting the outermost points. + + Find the outermost point by looking for the largest difference in X or Y. + Since the XOR of the indices is 3 (0 ^ 1 ^ 2) + the missing index equals: outer_1 ^ outer_2 ^ 3 + */ +static bool quad_in_line(const SkPoint quad[3]) { + SkScalar ptMax = -1; + int outer1 SK_INIT_TO_AVOID_WARNING; + int outer2 SK_INIT_TO_AVOID_WARNING; + for (int index = 0; index < 2; ++index) { + for (int inner = index + 1; inner < 3; ++inner) { + SkVector testDiff = quad[inner] - quad[index]; + SkScalar testMax = std::max(SkScalarAbs(testDiff.fX), SkScalarAbs(testDiff.fY)); + if (ptMax < testMax) { + outer1 = index; + outer2 = inner; + ptMax = testMax; + } + } + } + SkASSERT(outer1 >= 0 && outer1 <= 1); + SkASSERT(outer2 >= 1 && outer2 <= 2); + SkASSERT(outer1 < outer2); + int mid = outer1 ^ outer2 ^ 3; + const float kCurvatureSlop = 0.000005f; // this multiplier is pulled out of the air + SkScalar lineSlop = ptMax * ptMax * kCurvatureSlop; + return pt_to_line(quad[mid], quad[outer1], quad[outer2]) <= lineSlop; +} + +static bool conic_in_line(const SkConic& conic) { + return quad_in_line(conic.fPts); +} + +SkPathStroker::ReductionType SkPathStroker::CheckCubicLinear(const SkPoint cubic[4], + SkPoint reduction[3], const SkPoint** tangentPtPtr) { + bool degenerateAB = degenerate_vector(cubic[1] - cubic[0]); + bool degenerateBC = degenerate_vector(cubic[2] - cubic[1]); + bool degenerateCD = degenerate_vector(cubic[3] - cubic[2]); + if (degenerateAB & degenerateBC & degenerateCD) { + return kPoint_ReductionType; + } + if (degenerateAB + degenerateBC + degenerateCD == 2) { + return kLine_ReductionType; + } + if (!cubic_in_line(cubic)) { + *tangentPtPtr = degenerateAB ? &cubic[2] : &cubic[1]; + return kQuad_ReductionType; + } + SkScalar tValues[3]; + int count = SkFindCubicMaxCurvature(cubic, tValues); + int rCount = 0; + // Now loop over the t-values, and reject any that evaluate to either end-point + for (int index = 0; index < count; ++index) { + SkScalar t = tValues[index]; + if (0 >= t || t >= 1) { + continue; + } + SkEvalCubicAt(cubic, t, &reduction[rCount], nullptr, nullptr); + if (reduction[rCount] != cubic[0] && reduction[rCount] != cubic[3]) { + ++rCount; + } + } + if (rCount == 0) { + return kLine_ReductionType; + } + static_assert(kQuad_ReductionType + 1 == kDegenerate_ReductionType, "enum_out_of_whack"); + static_assert(kQuad_ReductionType + 2 == kDegenerate2_ReductionType, "enum_out_of_whack"); + static_assert(kQuad_ReductionType + 3 == kDegenerate3_ReductionType, "enum_out_of_whack"); + + return (ReductionType) (kQuad_ReductionType + rCount); +} + +SkPathStroker::ReductionType SkPathStroker::CheckConicLinear(const SkConic& conic, + SkPoint* reduction) { + bool degenerateAB = degenerate_vector(conic.fPts[1] - conic.fPts[0]); + bool degenerateBC = degenerate_vector(conic.fPts[2] - conic.fPts[1]); + if (degenerateAB & degenerateBC) { + return kPoint_ReductionType; + } + if (degenerateAB | degenerateBC) { + return kLine_ReductionType; + } + if (!conic_in_line(conic)) { + return kQuad_ReductionType; + } + // SkFindConicMaxCurvature would be a better solution, once we know how to + // implement it. Quad curvature is a reasonable substitute + SkScalar t = SkFindQuadMaxCurvature(conic.fPts); + if (0 == t) { + return kLine_ReductionType; + } + conic.evalAt(t, reduction, nullptr); + return kDegenerate_ReductionType; +} + +SkPathStroker::ReductionType SkPathStroker::CheckQuadLinear(const SkPoint quad[3], + SkPoint* reduction) { + bool degenerateAB = degenerate_vector(quad[1] - quad[0]); + bool degenerateBC = degenerate_vector(quad[2] - quad[1]); + if (degenerateAB & degenerateBC) { + return kPoint_ReductionType; + } + if (degenerateAB | degenerateBC) { + return kLine_ReductionType; + } + if (!quad_in_line(quad)) { + return kQuad_ReductionType; + } + SkScalar t = SkFindQuadMaxCurvature(quad); + if (0 == t || 1 == t) { + return kLine_ReductionType; + } + *reduction = SkEvalQuadAt(quad, t); + return kDegenerate_ReductionType; +} + +void SkPathStroker::conicTo(const SkPoint& pt1, const SkPoint& pt2, SkScalar weight) { + const SkConic conic(fPrevPt, pt1, pt2, weight); + SkPoint reduction; + ReductionType reductionType = CheckConicLinear(conic, &reduction); + if (kPoint_ReductionType == reductionType) { + /* If the stroke consists of a moveTo followed by a degenerate curve, treat it + as if it were followed by a zero-length line. Lines without length + can have square and round end caps. */ + this->lineTo(pt2); + return; + } + if (kLine_ReductionType == reductionType) { + this->lineTo(pt2); + return; + } + if (kDegenerate_ReductionType == reductionType) { + this->lineTo(reduction); + SkStrokerPriv::JoinProc saveJoiner = fJoiner; + fJoiner = SkStrokerPriv::JoinFactory(SkPaint::kRound_Join); + this->lineTo(pt2); + fJoiner = saveJoiner; + return; + } + SkASSERT(kQuad_ReductionType == reductionType); + SkVector normalAB, unitAB, normalBC, unitBC; + if (!this->preJoinTo(pt1, &normalAB, &unitAB, false)) { + this->lineTo(pt2); + return; + } + SkQuadConstruct quadPts; + this->init(kOuter_StrokeType, &quadPts, 0, 1); + (void) this->conicStroke(conic, &quadPts); + this->init(kInner_StrokeType, &quadPts, 0, 1); + (void) this->conicStroke(conic, &quadPts); + this->setConicEndNormal(conic, normalAB, unitAB, &normalBC, &unitBC); + this->postJoinTo(pt2, normalBC, unitBC); +} + +void SkPathStroker::quadTo(const SkPoint& pt1, const SkPoint& pt2) { + const SkPoint quad[3] = { fPrevPt, pt1, pt2 }; + SkPoint reduction; + ReductionType reductionType = CheckQuadLinear(quad, &reduction); + if (kPoint_ReductionType == reductionType) { + /* If the stroke consists of a moveTo followed by a degenerate curve, treat it + as if it were followed by a zero-length line. Lines without length + can have square and round end caps. */ + this->lineTo(pt2); + return; + } + if (kLine_ReductionType == reductionType) { + this->lineTo(pt2); + return; + } + if (kDegenerate_ReductionType == reductionType) { + this->lineTo(reduction); + SkStrokerPriv::JoinProc saveJoiner = fJoiner; + fJoiner = SkStrokerPriv::JoinFactory(SkPaint::kRound_Join); + this->lineTo(pt2); + fJoiner = saveJoiner; + return; + } + SkASSERT(kQuad_ReductionType == reductionType); + SkVector normalAB, unitAB, normalBC, unitBC; + if (!this->preJoinTo(pt1, &normalAB, &unitAB, false)) { + this->lineTo(pt2); + return; + } + SkQuadConstruct quadPts; + this->init(kOuter_StrokeType, &quadPts, 0, 1); + (void) this->quadStroke(quad, &quadPts); + this->init(kInner_StrokeType, &quadPts, 0, 1); + (void) this->quadStroke(quad, &quadPts); + this->setQuadEndNormal(quad, normalAB, unitAB, &normalBC, &unitBC); + + this->postJoinTo(pt2, normalBC, unitBC); +} + +// Given a point on the curve and its derivative, scale the derivative by the radius, and +// compute the perpendicular point and its tangent. +void SkPathStroker::setRayPts(const SkPoint& tPt, SkVector* dxy, SkPoint* onPt, + SkPoint* tangent) const { + if (!dxy->setLength(fRadius)) { + dxy->set(fRadius, 0); + } + SkScalar axisFlip = SkIntToScalar(fStrokeType); // go opposite ways for outer, inner + onPt->fX = tPt.fX + axisFlip * dxy->fY; + onPt->fY = tPt.fY - axisFlip * dxy->fX; + if (tangent) { + tangent->fX = onPt->fX + dxy->fX; + tangent->fY = onPt->fY + dxy->fY; + } +} + +// Given a conic and t, return the point on curve, its perpendicular, and the perpendicular tangent. +// Returns false if the perpendicular could not be computed (because the derivative collapsed to 0) +void SkPathStroker::conicPerpRay(const SkConic& conic, SkScalar t, SkPoint* tPt, SkPoint* onPt, + SkPoint* tangent) const { + SkVector dxy; + conic.evalAt(t, tPt, &dxy); + if (dxy.fX == 0 && dxy.fY == 0) { + dxy = conic.fPts[2] - conic.fPts[0]; + } + this->setRayPts(*tPt, &dxy, onPt, tangent); +} + +// Given a conic and a t range, find the start and end if they haven't been found already. +void SkPathStroker::conicQuadEnds(const SkConic& conic, SkQuadConstruct* quadPts) const { + if (!quadPts->fStartSet) { + SkPoint conicStartPt; + this->conicPerpRay(conic, quadPts->fStartT, &conicStartPt, &quadPts->fQuad[0], + &quadPts->fTangentStart); + quadPts->fStartSet = true; + } + if (!quadPts->fEndSet) { + SkPoint conicEndPt; + this->conicPerpRay(conic, quadPts->fEndT, &conicEndPt, &quadPts->fQuad[2], + &quadPts->fTangentEnd); + quadPts->fEndSet = true; + } +} + + +// Given a cubic and t, return the point on curve, its perpendicular, and the perpendicular tangent. +void SkPathStroker::cubicPerpRay(const SkPoint cubic[4], SkScalar t, SkPoint* tPt, SkPoint* onPt, + SkPoint* tangent) const { + SkVector dxy; + SkPoint chopped[7]; + SkEvalCubicAt(cubic, t, tPt, &dxy, nullptr); + if (dxy.fX == 0 && dxy.fY == 0) { + const SkPoint* cPts = cubic; + if (SkScalarNearlyZero(t)) { + dxy = cubic[2] - cubic[0]; + } else if (SkScalarNearlyZero(1 - t)) { + dxy = cubic[3] - cubic[1]; + } else { + // If the cubic inflection falls on the cusp, subdivide the cubic + // to find the tangent at that point. + SkChopCubicAt(cubic, chopped, t); + dxy = chopped[3] - chopped[2]; + if (dxy.fX == 0 && dxy.fY == 0) { + dxy = chopped[3] - chopped[1]; + cPts = chopped; + } + } + if (dxy.fX == 0 && dxy.fY == 0) { + dxy = cPts[3] - cPts[0]; + } + } + setRayPts(*tPt, &dxy, onPt, tangent); +} + +// Given a cubic and a t range, find the start and end if they haven't been found already. +void SkPathStroker::cubicQuadEnds(const SkPoint cubic[4], SkQuadConstruct* quadPts) { + if (!quadPts->fStartSet) { + SkPoint cubicStartPt; + this->cubicPerpRay(cubic, quadPts->fStartT, &cubicStartPt, &quadPts->fQuad[0], + &quadPts->fTangentStart); + quadPts->fStartSet = true; + } + if (!quadPts->fEndSet) { + SkPoint cubicEndPt; + this->cubicPerpRay(cubic, quadPts->fEndT, &cubicEndPt, &quadPts->fQuad[2], + &quadPts->fTangentEnd); + quadPts->fEndSet = true; + } +} + +void SkPathStroker::cubicQuadMid(const SkPoint cubic[4], const SkQuadConstruct* quadPts, + SkPoint* mid) const { + SkPoint cubicMidPt; + this->cubicPerpRay(cubic, quadPts->fMidT, &cubicMidPt, mid, nullptr); +} + +// Given a quad and t, return the point on curve, its perpendicular, and the perpendicular tangent. +void SkPathStroker::quadPerpRay(const SkPoint quad[3], SkScalar t, SkPoint* tPt, SkPoint* onPt, + SkPoint* tangent) const { + SkVector dxy; + SkEvalQuadAt(quad, t, tPt, &dxy); + if (dxy.fX == 0 && dxy.fY == 0) { + dxy = quad[2] - quad[0]; + } + setRayPts(*tPt, &dxy, onPt, tangent); +} + +// Find the intersection of the stroke tangents to construct a stroke quad. +// Return whether the stroke is a degenerate (a line), a quad, or must be split. +// Optionally compute the quad's control point. +SkPathStroker::ResultType SkPathStroker::intersectRay(SkQuadConstruct* quadPts, + IntersectRayType intersectRayType STROKER_DEBUG_PARAMS(int depth)) const { + const SkPoint& start = quadPts->fQuad[0]; + const SkPoint& end = quadPts->fQuad[2]; + SkVector aLen = quadPts->fTangentStart - start; + SkVector bLen = quadPts->fTangentEnd - end; + /* Slopes match when denom goes to zero: + axLen / ayLen == bxLen / byLen + (ayLen * byLen) * axLen / ayLen == (ayLen * byLen) * bxLen / byLen + byLen * axLen == ayLen * bxLen + byLen * axLen - ayLen * bxLen ( == denom ) + */ + SkScalar denom = aLen.cross(bLen); + if (denom == 0 || !SkScalarIsFinite(denom)) { + quadPts->fOppositeTangents = aLen.dot(bLen) < 0; + return STROKER_RESULT(kDegenerate_ResultType, depth, quadPts, "denom == 0"); + } + quadPts->fOppositeTangents = false; + SkVector ab0 = start - end; + SkScalar numerA = bLen.cross(ab0); + SkScalar numerB = aLen.cross(ab0); + if ((numerA >= 0) == (numerB >= 0)) { // if the control point is outside the quad ends + // if the perpendicular distances from the quad points to the opposite tangent line + // are small, a straight line is good enough + SkScalar dist1 = pt_to_line(start, end, quadPts->fTangentEnd); + SkScalar dist2 = pt_to_line(end, start, quadPts->fTangentStart); + if (std::max(dist1, dist2) <= fInvResScaleSquared) { + return STROKER_RESULT(kDegenerate_ResultType, depth, quadPts, + "std::max(dist1=%g, dist2=%g) <= fInvResScaleSquared", dist1, dist2); + } + return STROKER_RESULT(kSplit_ResultType, depth, quadPts, + "(numerA=%g >= 0) == (numerB=%g >= 0)", numerA, numerB); + } + // check to see if the denominator is teeny relative to the numerator + // if the offset by one will be lost, the ratio is too large + numerA /= denom; + bool validDivide = numerA > numerA - 1; + if (validDivide) { + if (kCtrlPt_RayType == intersectRayType) { + SkPoint* ctrlPt = &quadPts->fQuad[1]; + // the intersection of the tangents need not be on the tangent segment + // so 0 <= numerA <= 1 is not necessarily true + ctrlPt->fX = start.fX * (1 - numerA) + quadPts->fTangentStart.fX * numerA; + ctrlPt->fY = start.fY * (1 - numerA) + quadPts->fTangentStart.fY * numerA; + } + return STROKER_RESULT(kQuad_ResultType, depth, quadPts, + "(numerA=%g >= 0) != (numerB=%g >= 0)", numerA, numerB); + } + quadPts->fOppositeTangents = aLen.dot(bLen) < 0; + // if the lines are parallel, straight line is good enough + return STROKER_RESULT(kDegenerate_ResultType, depth, quadPts, + "SkScalarNearlyZero(denom=%g)", denom); +} + +// Given a cubic and a t-range, determine if the stroke can be described by a quadratic. +SkPathStroker::ResultType SkPathStroker::tangentsMeet(const SkPoint cubic[4], + SkQuadConstruct* quadPts) { + this->cubicQuadEnds(cubic, quadPts); + return this->intersectRay(quadPts, kResultType_RayType STROKER_DEBUG_PARAMS(fRecursionDepth)); +} + +// Intersect the line with the quad and return the t values on the quad where the line crosses. +static int intersect_quad_ray(const SkPoint line[2], const SkPoint quad[3], SkScalar roots[2]) { + SkVector vec = line[1] - line[0]; + SkScalar r[3]; + for (int n = 0; n < 3; ++n) { + r[n] = (quad[n].fY - line[0].fY) * vec.fX - (quad[n].fX - line[0].fX) * vec.fY; + } + SkScalar A = r[2]; + SkScalar B = r[1]; + SkScalar C = r[0]; + A += C - 2 * B; // A = a - 2*b + c + B -= C; // B = -(b - c) + return SkFindUnitQuadRoots(A, 2 * B, C, roots); +} + +// Return true if the point is close to the bounds of the quad. This is used as a quick reject. +bool SkPathStroker::ptInQuadBounds(const SkPoint quad[3], const SkPoint& pt) const { + SkScalar xMin = std::min(std::min(quad[0].fX, quad[1].fX), quad[2].fX); + if (pt.fX + fInvResScale < xMin) { + return false; + } + SkScalar xMax = std::max(std::max(quad[0].fX, quad[1].fX), quad[2].fX); + if (pt.fX - fInvResScale > xMax) { + return false; + } + SkScalar yMin = std::min(std::min(quad[0].fY, quad[1].fY), quad[2].fY); + if (pt.fY + fInvResScale < yMin) { + return false; + } + SkScalar yMax = std::max(std::max(quad[0].fY, quad[1].fY), quad[2].fY); + if (pt.fY - fInvResScale > yMax) { + return false; + } + return true; +} + +static bool points_within_dist(const SkPoint& nearPt, const SkPoint& farPt, SkScalar limit) { + return SkPointPriv::DistanceToSqd(nearPt, farPt) <= limit * limit; +} + +static bool sharp_angle(const SkPoint quad[3]) { + SkVector smaller = quad[1] - quad[0]; + SkVector larger = quad[1] - quad[2]; + SkScalar smallerLen = SkPointPriv::LengthSqd(smaller); + SkScalar largerLen = SkPointPriv::LengthSqd(larger); + if (smallerLen > largerLen) { + using std::swap; + swap(smaller, larger); + largerLen = smallerLen; + } + if (!smaller.setLength(largerLen)) { + return false; + } + SkScalar dot = smaller.dot(larger); + return dot > 0; +} + +SkPathStroker::ResultType SkPathStroker::strokeCloseEnough(const SkPoint stroke[3], + const SkPoint ray[2], SkQuadConstruct* quadPts STROKER_DEBUG_PARAMS(int depth)) const { + SkPoint strokeMid = SkEvalQuadAt(stroke, SK_ScalarHalf); + // measure the distance from the curve to the quad-stroke midpoint, compare to radius + if (points_within_dist(ray[0], strokeMid, fInvResScale)) { // if the difference is small + if (sharp_angle(quadPts->fQuad)) { + return STROKER_RESULT(kSplit_ResultType, depth, quadPts, + "sharp_angle (1) =%g,%g, %g,%g, %g,%g", + quadPts->fQuad[0].fX, quadPts->fQuad[0].fY, + quadPts->fQuad[1].fX, quadPts->fQuad[1].fY, + quadPts->fQuad[2].fX, quadPts->fQuad[2].fY); + } + return STROKER_RESULT(kQuad_ResultType, depth, quadPts, + "points_within_dist(ray[0]=%g,%g, strokeMid=%g,%g, fInvResScale=%g)", + ray[0].fX, ray[0].fY, strokeMid.fX, strokeMid.fY, fInvResScale); + } + // measure the distance to quad's bounds (quick reject) + // an alternative : look for point in triangle + if (!ptInQuadBounds(stroke, ray[0])) { // if far, subdivide + return STROKER_RESULT(kSplit_ResultType, depth, quadPts, + "!pt_in_quad_bounds(stroke=(%g,%g %g,%g %g,%g), ray[0]=%g,%g)", + stroke[0].fX, stroke[0].fY, stroke[1].fX, stroke[1].fY, stroke[2].fX, stroke[2].fY, + ray[0].fX, ray[0].fY); + } + // measure the curve ray distance to the quad-stroke + SkScalar roots[2]; + int rootCount = intersect_quad_ray(ray, stroke, roots); + if (rootCount != 1) { + return STROKER_RESULT(kSplit_ResultType, depth, quadPts, + "rootCount=%d != 1", rootCount); + } + SkPoint quadPt = SkEvalQuadAt(stroke, roots[0]); + SkScalar error = fInvResScale * (SK_Scalar1 - SkScalarAbs(roots[0] - 0.5f) * 2); + if (points_within_dist(ray[0], quadPt, error)) { // if the difference is small, we're done + if (sharp_angle(quadPts->fQuad)) { + return STROKER_RESULT(kSplit_ResultType, depth, quadPts, + "sharp_angle (2) =%g,%g, %g,%g, %g,%g", + quadPts->fQuad[0].fX, quadPts->fQuad[0].fY, + quadPts->fQuad[1].fX, quadPts->fQuad[1].fY, + quadPts->fQuad[2].fX, quadPts->fQuad[2].fY); + } + return STROKER_RESULT(kQuad_ResultType, depth, quadPts, + "points_within_dist(ray[0]=%g,%g, quadPt=%g,%g, error=%g)", + ray[0].fX, ray[0].fY, quadPt.fX, quadPt.fY, error); + } + // otherwise, subdivide + return STROKER_RESULT(kSplit_ResultType, depth, quadPts, "%s", "fall through"); +} + +SkPathStroker::ResultType SkPathStroker::compareQuadCubic(const SkPoint cubic[4], + SkQuadConstruct* quadPts) { + // get the quadratic approximation of the stroke + this->cubicQuadEnds(cubic, quadPts); + ResultType resultType = this->intersectRay(quadPts, kCtrlPt_RayType + STROKER_DEBUG_PARAMS(fRecursionDepth) ); + if (resultType != kQuad_ResultType) { + return resultType; + } + // project a ray from the curve to the stroke + SkPoint ray[2]; // points near midpoint on quad, midpoint on cubic + this->cubicPerpRay(cubic, quadPts->fMidT, &ray[1], &ray[0], nullptr); + return this->strokeCloseEnough(quadPts->fQuad, ray, quadPts + STROKER_DEBUG_PARAMS(fRecursionDepth)); +} + +SkPathStroker::ResultType SkPathStroker::compareQuadConic(const SkConic& conic, + SkQuadConstruct* quadPts) const { + // get the quadratic approximation of the stroke + this->conicQuadEnds(conic, quadPts); + ResultType resultType = this->intersectRay(quadPts, kCtrlPt_RayType + STROKER_DEBUG_PARAMS(fRecursionDepth) ); + if (resultType != kQuad_ResultType) { + return resultType; + } + // project a ray from the curve to the stroke + SkPoint ray[2]; // points near midpoint on quad, midpoint on conic + this->conicPerpRay(conic, quadPts->fMidT, &ray[1], &ray[0], nullptr); + return this->strokeCloseEnough(quadPts->fQuad, ray, quadPts + STROKER_DEBUG_PARAMS(fRecursionDepth)); +} + +SkPathStroker::ResultType SkPathStroker::compareQuadQuad(const SkPoint quad[3], + SkQuadConstruct* quadPts) { + // get the quadratic approximation of the stroke + if (!quadPts->fStartSet) { + SkPoint quadStartPt; + this->quadPerpRay(quad, quadPts->fStartT, &quadStartPt, &quadPts->fQuad[0], + &quadPts->fTangentStart); + quadPts->fStartSet = true; + } + if (!quadPts->fEndSet) { + SkPoint quadEndPt; + this->quadPerpRay(quad, quadPts->fEndT, &quadEndPt, &quadPts->fQuad[2], + &quadPts->fTangentEnd); + quadPts->fEndSet = true; + } + ResultType resultType = this->intersectRay(quadPts, kCtrlPt_RayType + STROKER_DEBUG_PARAMS(fRecursionDepth)); + if (resultType != kQuad_ResultType) { + return resultType; + } + // project a ray from the curve to the stroke + SkPoint ray[2]; + this->quadPerpRay(quad, quadPts->fMidT, &ray[1], &ray[0], nullptr); + return this->strokeCloseEnough(quadPts->fQuad, ray, quadPts + STROKER_DEBUG_PARAMS(fRecursionDepth)); +} + +void SkPathStroker::addDegenerateLine(const SkQuadConstruct* quadPts) { + const SkPoint* quad = quadPts->fQuad; + SkPath* path = fStrokeType == kOuter_StrokeType ? &fOuter : &fInner; + path->lineTo(quad[2].fX, quad[2].fY); +} + +bool SkPathStroker::cubicMidOnLine(const SkPoint cubic[4], const SkQuadConstruct* quadPts) const { + SkPoint strokeMid; + this->cubicQuadMid(cubic, quadPts, &strokeMid); + SkScalar dist = pt_to_line(strokeMid, quadPts->fQuad[0], quadPts->fQuad[2]); + return dist < fInvResScaleSquared; +} + +bool SkPathStroker::cubicStroke(const SkPoint cubic[4], SkQuadConstruct* quadPts) { + if (!fFoundTangents) { + ResultType resultType = this->tangentsMeet(cubic, quadPts); + if (kQuad_ResultType != resultType) { + if ((kDegenerate_ResultType == resultType + || points_within_dist(quadPts->fQuad[0], quadPts->fQuad[2], + fInvResScale)) && cubicMidOnLine(cubic, quadPts)) { + addDegenerateLine(quadPts); + DEBUG_CUBIC_RECURSION_TRACK_DEPTH(fRecursionDepth); + return true; + } + } else { + fFoundTangents = true; + } + } + if (fFoundTangents) { + ResultType resultType = this->compareQuadCubic(cubic, quadPts); + if (kQuad_ResultType == resultType) { + SkPath* path = fStrokeType == kOuter_StrokeType ? &fOuter : &fInner; + const SkPoint* stroke = quadPts->fQuad; + path->quadTo(stroke[1].fX, stroke[1].fY, stroke[2].fX, stroke[2].fY); + DEBUG_CUBIC_RECURSION_TRACK_DEPTH(fRecursionDepth); + return true; + } + if (kDegenerate_ResultType == resultType) { + if (!quadPts->fOppositeTangents) { + addDegenerateLine(quadPts); + DEBUG_CUBIC_RECURSION_TRACK_DEPTH(fRecursionDepth); + return true; + } + } + } + if (!SkScalarIsFinite(quadPts->fQuad[2].fX) || !SkScalarIsFinite(quadPts->fQuad[2].fY)) { + DEBUG_CUBIC_RECURSION_TRACK_DEPTH(fRecursionDepth); + return false; // just abort if projected quad isn't representable + } +#if QUAD_STROKE_APPROX_EXTENDED_DEBUGGING + SkDEBUGCODE(gMaxRecursion[fFoundTangents] = std::max(gMaxRecursion[fFoundTangents], + fRecursionDepth + 1)); +#endif + if (++fRecursionDepth > kRecursiveLimits[fFoundTangents]) { + DEBUG_CUBIC_RECURSION_TRACK_DEPTH(fRecursionDepth); + return false; // just abort if projected quad isn't representable + } + SkQuadConstruct half; + if (!half.initWithStart(quadPts)) { + addDegenerateLine(quadPts); + DEBUG_CUBIC_RECURSION_TRACK_DEPTH(fRecursionDepth); + --fRecursionDepth; + return true; + } + if (!this->cubicStroke(cubic, &half)) { + return false; + } + if (!half.initWithEnd(quadPts)) { + addDegenerateLine(quadPts); + DEBUG_CUBIC_RECURSION_TRACK_DEPTH(fRecursionDepth); + --fRecursionDepth; + return true; + } + if (!this->cubicStroke(cubic, &half)) { + return false; + } + --fRecursionDepth; + return true; +} + +bool SkPathStroker::conicStroke(const SkConic& conic, SkQuadConstruct* quadPts) { + ResultType resultType = this->compareQuadConic(conic, quadPts); + if (kQuad_ResultType == resultType) { + const SkPoint* stroke = quadPts->fQuad; + SkPath* path = fStrokeType == kOuter_StrokeType ? &fOuter : &fInner; + path->quadTo(stroke[1].fX, stroke[1].fY, stroke[2].fX, stroke[2].fY); + return true; + } + if (kDegenerate_ResultType == resultType) { + addDegenerateLine(quadPts); + return true; + } +#if QUAD_STROKE_APPROX_EXTENDED_DEBUGGING + SkDEBUGCODE(gMaxRecursion[kConic_RecursiveLimit] = std::max(gMaxRecursion[kConic_RecursiveLimit], + fRecursionDepth + 1)); +#endif + if (++fRecursionDepth > kRecursiveLimits[kConic_RecursiveLimit]) { + return false; // just abort if projected quad isn't representable + } + SkQuadConstruct half; + (void) half.initWithStart(quadPts); + if (!this->conicStroke(conic, &half)) { + return false; + } + (void) half.initWithEnd(quadPts); + if (!this->conicStroke(conic, &half)) { + return false; + } + --fRecursionDepth; + return true; +} + +bool SkPathStroker::quadStroke(const SkPoint quad[3], SkQuadConstruct* quadPts) { + ResultType resultType = this->compareQuadQuad(quad, quadPts); + if (kQuad_ResultType == resultType) { + const SkPoint* stroke = quadPts->fQuad; + SkPath* path = fStrokeType == kOuter_StrokeType ? &fOuter : &fInner; + path->quadTo(stroke[1].fX, stroke[1].fY, stroke[2].fX, stroke[2].fY); + return true; + } + if (kDegenerate_ResultType == resultType) { + addDegenerateLine(quadPts); + return true; + } +#if QUAD_STROKE_APPROX_EXTENDED_DEBUGGING + SkDEBUGCODE(gMaxRecursion[kQuad_RecursiveLimit] = std::max(gMaxRecursion[kQuad_RecursiveLimit], + fRecursionDepth + 1)); +#endif + if (++fRecursionDepth > kRecursiveLimits[kQuad_RecursiveLimit]) { + return false; // just abort if projected quad isn't representable + } + SkQuadConstruct half; + (void) half.initWithStart(quadPts); + if (!this->quadStroke(quad, &half)) { + return false; + } + (void) half.initWithEnd(quadPts); + if (!this->quadStroke(quad, &half)) { + return false; + } + --fRecursionDepth; + return true; +} + +void SkPathStroker::cubicTo(const SkPoint& pt1, const SkPoint& pt2, + const SkPoint& pt3) { + const SkPoint cubic[4] = { fPrevPt, pt1, pt2, pt3 }; + SkPoint reduction[3]; + const SkPoint* tangentPt; + ReductionType reductionType = CheckCubicLinear(cubic, reduction, &tangentPt); + if (kPoint_ReductionType == reductionType) { + /* If the stroke consists of a moveTo followed by a degenerate curve, treat it + as if it were followed by a zero-length line. Lines without length + can have square and round end caps. */ + this->lineTo(pt3); + return; + } + if (kLine_ReductionType == reductionType) { + this->lineTo(pt3); + return; + } + if (kDegenerate_ReductionType <= reductionType && kDegenerate3_ReductionType >= reductionType) { + this->lineTo(reduction[0]); + SkStrokerPriv::JoinProc saveJoiner = fJoiner; + fJoiner = SkStrokerPriv::JoinFactory(SkPaint::kRound_Join); + if (kDegenerate2_ReductionType <= reductionType) { + this->lineTo(reduction[1]); + } + if (kDegenerate3_ReductionType == reductionType) { + this->lineTo(reduction[2]); + } + this->lineTo(pt3); + fJoiner = saveJoiner; + return; + } + SkASSERT(kQuad_ReductionType == reductionType); + SkVector normalAB, unitAB, normalCD, unitCD; + if (!this->preJoinTo(*tangentPt, &normalAB, &unitAB, false)) { + this->lineTo(pt3); + return; + } + SkScalar tValues[2]; + int count = SkFindCubicInflections(cubic, tValues); + SkScalar lastT = 0; + for (int index = 0; index <= count; ++index) { + SkScalar nextT = index < count ? tValues[index] : 1; + SkQuadConstruct quadPts; + this->init(kOuter_StrokeType, &quadPts, lastT, nextT); + (void) this->cubicStroke(cubic, &quadPts); + this->init(kInner_StrokeType, &quadPts, lastT, nextT); + (void) this->cubicStroke(cubic, &quadPts); + lastT = nextT; + } + SkScalar cusp = SkFindCubicCusp(cubic); + if (cusp > 0) { + SkPoint cuspLoc; + SkEvalCubicAt(cubic, cusp, &cuspLoc, nullptr, nullptr); + fCusper.addCircle(cuspLoc.fX, cuspLoc.fY, fRadius); + } + // emit the join even if one stroke succeeded but the last one failed + // this avoids reversing an inner stroke with a partial path followed by another moveto + this->setCubicEndNormal(cubic, normalAB, unitAB, &normalCD, &unitCD); + + this->postJoinTo(pt3, normalCD, unitCD); +} + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// + +#include "src/core/SkPaintDefaults.h" + +SkStroke::SkStroke() { + fWidth = SK_Scalar1; + fMiterLimit = SkPaintDefaults_MiterLimit; + fResScale = 1; + fCap = SkPaint::kDefault_Cap; + fJoin = SkPaint::kDefault_Join; + fDoFill = false; +} + +SkStroke::SkStroke(const SkPaint& p) { + fWidth = p.getStrokeWidth(); + fMiterLimit = p.getStrokeMiter(); + fResScale = 1; + fCap = (uint8_t)p.getStrokeCap(); + fJoin = (uint8_t)p.getStrokeJoin(); + fDoFill = SkToU8(p.getStyle() == SkPaint::kStrokeAndFill_Style); +} + +SkStroke::SkStroke(const SkPaint& p, SkScalar width) { + fWidth = width; + fMiterLimit = p.getStrokeMiter(); + fResScale = 1; + fCap = (uint8_t)p.getStrokeCap(); + fJoin = (uint8_t)p.getStrokeJoin(); + fDoFill = SkToU8(p.getStyle() == SkPaint::kStrokeAndFill_Style); +} + +void SkStroke::setWidth(SkScalar width) { + SkASSERT(width >= 0); + fWidth = width; +} + +void SkStroke::setMiterLimit(SkScalar miterLimit) { + SkASSERT(miterLimit >= 0); + fMiterLimit = miterLimit; +} + +void SkStroke::setCap(SkPaint::Cap cap) { + SkASSERT((unsigned)cap < SkPaint::kCapCount); + fCap = SkToU8(cap); +} + +void SkStroke::setJoin(SkPaint::Join join) { + SkASSERT((unsigned)join < SkPaint::kJoinCount); + fJoin = SkToU8(join); +} + +/////////////////////////////////////////////////////////////////////////////// + +// If src==dst, then we use a tmp path to record the stroke, and then swap +// its contents with src when we're done. +class AutoTmpPath { +public: + AutoTmpPath(const SkPath& src, SkPath** dst) : fSrc(src) { + if (&src == *dst) { + *dst = &fTmpDst; + fSwapWithSrc = true; + } else { + (*dst)->reset(); + fSwapWithSrc = false; + } + } + + ~AutoTmpPath() { + if (fSwapWithSrc) { + fTmpDst.swap(*const_cast(&fSrc)); + } + } + +private: + SkPath fTmpDst; + const SkPath& fSrc; + bool fSwapWithSrc; +}; + +void SkStroke::strokePath(const SkPath& src, SkPath* dst) const { + SkASSERT(dst); + + SkScalar radius = SkScalarHalf(fWidth); + + AutoTmpPath tmp(src, &dst); + + if (radius <= 0) { + return; + } + + // If src is really a rect, call our specialty strokeRect() method + { + SkRect rect; + bool isClosed = false; + SkPathDirection dir; + if (src.isRect(&rect, &isClosed, &dir) && isClosed) { + this->strokeRect(rect, dst, dir); + // our answer should preserve the inverseness of the src + if (src.isInverseFillType()) { + SkASSERT(!dst->isInverseFillType()); + dst->toggleInverseFillType(); + } + return; + } + } + + // We can always ignore centers for stroke and fill convex line-only paths + // TODO: remove the line-only restriction + bool ignoreCenter = fDoFill && (src.getSegmentMasks() == SkPath::kLine_SegmentMask) && + src.isLastContourClosed() && src.isConvex(); + + SkPathStroker stroker(src, radius, fMiterLimit, this->getCap(), this->getJoin(), + fResScale, ignoreCenter); + SkPath::Iter iter(src, false); + SkPath::Verb lastSegment = SkPath::kMove_Verb; + + for (;;) { + SkPoint pts[4]; + switch (iter.next(pts)) { + case SkPath::kMove_Verb: + stroker.moveTo(pts[0]); + break; + case SkPath::kLine_Verb: + stroker.lineTo(pts[1], &iter); + lastSegment = SkPath::kLine_Verb; + break; + case SkPath::kQuad_Verb: + stroker.quadTo(pts[1], pts[2]); + lastSegment = SkPath::kQuad_Verb; + break; + case SkPath::kConic_Verb: { + stroker.conicTo(pts[1], pts[2], iter.conicWeight()); + lastSegment = SkPath::kConic_Verb; + } break; + case SkPath::kCubic_Verb: + stroker.cubicTo(pts[1], pts[2], pts[3]); + lastSegment = SkPath::kCubic_Verb; + break; + case SkPath::kClose_Verb: + if (SkPaint::kButt_Cap != this->getCap()) { + /* If the stroke consists of a moveTo followed by a close, treat it + as if it were followed by a zero-length line. Lines without length + can have square and round end caps. */ + if (stroker.hasOnlyMoveTo()) { + stroker.lineTo(stroker.moveToPt()); + goto ZERO_LENGTH; + } + /* If the stroke consists of a moveTo followed by one or more zero-length + verbs, then followed by a close, treat is as if it were followed by a + zero-length line. Lines without length can have square & round end caps. */ + if (stroker.isCurrentContourEmpty()) { + ZERO_LENGTH: + lastSegment = SkPath::kLine_Verb; + break; + } + } + stroker.close(lastSegment == SkPath::kLine_Verb); + break; + case SkPath::kDone_Verb: + goto DONE; + } + } +DONE: + stroker.done(dst, lastSegment == SkPath::kLine_Verb); + + if (fDoFill && !ignoreCenter) { + if (SkPathPriv::ComputeFirstDirection(src) == SkPathFirstDirection::kCCW) { + dst->reverseAddPath(src); + } else { + dst->addPath(src); + } + } else { + // Seems like we can assume that a 2-point src would always result in + // a convex stroke, but testing has proved otherwise. + // TODO: fix the stroker to make this assumption true (without making + // it slower that the work that will be done in computeConvexity()) +#if 0 + // this test results in a non-convex stroke :( + static void test(SkCanvas* canvas) { + SkPoint pts[] = { 146.333328, 192.333328, 300.333344, 293.333344 }; + SkPaint paint; + paint.setStrokeWidth(7); + paint.setStrokeCap(SkPaint::kRound_Cap); + canvas->drawLine(pts[0].fX, pts[0].fY, pts[1].fX, pts[1].fY, paint); + } +#endif +#if 0 + if (2 == src.countPoints()) { + dst->setIsConvex(true); + } +#endif + } + + // our answer should preserve the inverseness of the src + if (src.isInverseFillType()) { + SkASSERT(!dst->isInverseFillType()); + dst->toggleInverseFillType(); + } +} + +static SkPathDirection reverse_direction(SkPathDirection dir) { + static const SkPathDirection gOpposite[] = { SkPathDirection::kCCW, SkPathDirection::kCW }; + return gOpposite[(int)dir]; +} + +static void addBevel(SkPath* path, const SkRect& r, const SkRect& outer, SkPathDirection dir) { + SkPoint pts[8]; + + if (SkPathDirection::kCW == dir) { + pts[0].set(r.fLeft, outer.fTop); + pts[1].set(r.fRight, outer.fTop); + pts[2].set(outer.fRight, r.fTop); + pts[3].set(outer.fRight, r.fBottom); + pts[4].set(r.fRight, outer.fBottom); + pts[5].set(r.fLeft, outer.fBottom); + pts[6].set(outer.fLeft, r.fBottom); + pts[7].set(outer.fLeft, r.fTop); + } else { + pts[7].set(r.fLeft, outer.fTop); + pts[6].set(r.fRight, outer.fTop); + pts[5].set(outer.fRight, r.fTop); + pts[4].set(outer.fRight, r.fBottom); + pts[3].set(r.fRight, outer.fBottom); + pts[2].set(r.fLeft, outer.fBottom); + pts[1].set(outer.fLeft, r.fBottom); + pts[0].set(outer.fLeft, r.fTop); + } + path->addPoly(pts, 8, true); +} + +void SkStroke::strokeRect(const SkRect& origRect, SkPath* dst, + SkPathDirection dir) const { + SkASSERT(dst != nullptr); + dst->reset(); + + SkScalar radius = SkScalarHalf(fWidth); + if (radius <= 0) { + return; + } + + SkScalar rw = origRect.width(); + SkScalar rh = origRect.height(); + if ((rw < 0) ^ (rh < 0)) { + dir = reverse_direction(dir); + } + SkRect rect(origRect); + rect.sort(); + // reassign these, now that we know they'll be >= 0 + rw = rect.width(); + rh = rect.height(); + + SkRect r(rect); + r.outset(radius, radius); + + SkPaint::Join join = (SkPaint::Join)fJoin; + if (SkPaint::kMiter_Join == join && fMiterLimit < SK_ScalarSqrt2) { + join = SkPaint::kBevel_Join; + } + + switch (join) { + case SkPaint::kMiter_Join: + dst->addRect(r, dir); + break; + case SkPaint::kBevel_Join: + addBevel(dst, rect, r, dir); + break; + case SkPaint::kRound_Join: + dst->addRoundRect(r, radius, radius, dir); + break; + default: + break; + } + + if (fWidth < std::min(rw, rh) && !fDoFill) { + r = rect; + r.inset(radius, radius); + dst->addRect(r, reverse_direction(dir)); + } +} diff --git a/gfx/skia/skia/src/core/SkStroke.h b/gfx/skia/skia/src/core/SkStroke.h new file mode 100644 index 0000000000..fb7323d827 --- /dev/null +++ b/gfx/skia/skia/src/core/SkStroke.h @@ -0,0 +1,78 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkStroke_DEFINED +#define SkStroke_DEFINED + +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/private/base/SkTo.h" + +#ifdef SK_DEBUG +extern bool gDebugStrokerErrorSet; +extern SkScalar gDebugStrokerError; +extern int gMaxRecursion[]; +#endif + +/** \class SkStroke + SkStroke is the utility class that constructs paths by stroking + geometries (lines, rects, ovals, roundrects, paths). This is + invoked when a geometry or text is drawn in a canvas with the + kStroke_Mask bit set in the paint. +*/ +class SkStroke { +public: + SkStroke(); + SkStroke(const SkPaint&); + SkStroke(const SkPaint&, SkScalar width); // width overrides paint.getStrokeWidth() + + SkPaint::Cap getCap() const { return (SkPaint::Cap)fCap; } + void setCap(SkPaint::Cap); + + SkPaint::Join getJoin() const { return (SkPaint::Join)fJoin; } + void setJoin(SkPaint::Join); + + void setMiterLimit(SkScalar); + void setWidth(SkScalar); + + bool getDoFill() const { return SkToBool(fDoFill); } + void setDoFill(bool doFill) { fDoFill = SkToU8(doFill); } + + /** + * ResScale is the "intended" resolution for the output. + * Default is 1.0. + * Larger values (res > 1) indicate that the result should be more precise, since it will + * be zoomed up, and small errors will be magnified. + * Smaller values (0 < res < 1) indicate that the result can be less precise, since it will + * be zoomed down, and small errors may be invisible. + */ + SkScalar getResScale() const { return fResScale; } + void setResScale(SkScalar rs) { + SkASSERT(rs > 0 && SkScalarIsFinite(rs)); + fResScale = rs; + } + + /** + * Stroke the specified rect, winding it in the specified direction.. + */ + void strokeRect(const SkRect& rect, SkPath* result, + SkPathDirection = SkPathDirection::kCW) const; + void strokePath(const SkPath& path, SkPath*) const; + + //////////////////////////////////////////////////////////////// + +private: + SkScalar fWidth, fMiterLimit; + SkScalar fResScale; + uint8_t fCap, fJoin; + bool fDoFill; + + friend class SkPaint; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkStrokeRec.cpp b/gfx/skia/skia/src/core/SkStrokeRec.cpp new file mode 100644 index 0000000000..d63079269f --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrokeRec.cpp @@ -0,0 +1,172 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStrokeRec.h" + +#include "src/core/SkPaintDefaults.h" +#include "src/core/SkStroke.h" + +#include + +// must be < 0, since ==0 means hairline, and >0 means normal stroke +#define kStrokeRec_FillStyleWidth (-SK_Scalar1) + +SkStrokeRec::SkStrokeRec(InitStyle s) { + fResScale = 1; + fWidth = (kFill_InitStyle == s) ? kStrokeRec_FillStyleWidth : 0; + fMiterLimit = SkPaintDefaults_MiterLimit; + fCap = SkPaint::kDefault_Cap; + fJoin = SkPaint::kDefault_Join; + fStrokeAndFill = false; +} + +SkStrokeRec::SkStrokeRec(const SkPaint& paint, SkScalar resScale) { + this->init(paint, paint.getStyle(), resScale); +} + +SkStrokeRec::SkStrokeRec(const SkPaint& paint, SkPaint::Style styleOverride, SkScalar resScale) { + this->init(paint, styleOverride, resScale); +} + +void SkStrokeRec::init(const SkPaint& paint, SkPaint::Style style, SkScalar resScale) { + fResScale = resScale; + + switch (style) { + case SkPaint::kFill_Style: + fWidth = kStrokeRec_FillStyleWidth; + fStrokeAndFill = false; + break; + case SkPaint::kStroke_Style: + fWidth = paint.getStrokeWidth(); + fStrokeAndFill = false; + break; + case SkPaint::kStrokeAndFill_Style: + if (0 == paint.getStrokeWidth()) { + // hairline+fill == fill + fWidth = kStrokeRec_FillStyleWidth; + fStrokeAndFill = false; + } else { + fWidth = paint.getStrokeWidth(); + fStrokeAndFill = true; + } + break; + default: + SkDEBUGFAIL("unknown paint style"); + // fall back on just fill + fWidth = kStrokeRec_FillStyleWidth; + fStrokeAndFill = false; + break; + } + + // copy these from the paint, regardless of our "style" + fMiterLimit = paint.getStrokeMiter(); + fCap = paint.getStrokeCap(); + fJoin = paint.getStrokeJoin(); +} + +SkStrokeRec::Style SkStrokeRec::getStyle() const { + if (fWidth < 0) { + return kFill_Style; + } else if (0 == fWidth) { + return kHairline_Style; + } else { + return fStrokeAndFill ? kStrokeAndFill_Style : kStroke_Style; + } +} + +void SkStrokeRec::setFillStyle() { + fWidth = kStrokeRec_FillStyleWidth; + fStrokeAndFill = false; +} + +void SkStrokeRec::setHairlineStyle() { + fWidth = 0; + fStrokeAndFill = false; +} + +void SkStrokeRec::setStrokeStyle(SkScalar width, bool strokeAndFill) { + if (strokeAndFill && (0 == width)) { + // hairline+fill == fill + this->setFillStyle(); + } else { + fWidth = width; + fStrokeAndFill = strokeAndFill; + } +} + +#ifdef SK_DEBUG + // enables tweaking these values at runtime from Viewer + bool gDebugStrokerErrorSet = false; + SkScalar gDebugStrokerError; +#endif + +bool SkStrokeRec::applyToPath(SkPath* dst, const SkPath& src) const { + if (fWidth <= 0) { // hairline or fill + return false; + } + + SkStroke stroker; + stroker.setCap((SkPaint::Cap)fCap); + stroker.setJoin((SkPaint::Join)fJoin); + stroker.setMiterLimit(fMiterLimit); + stroker.setWidth(fWidth); + stroker.setDoFill(fStrokeAndFill); +#ifdef SK_DEBUG + stroker.setResScale(gDebugStrokerErrorSet ? gDebugStrokerError : fResScale); +#else + stroker.setResScale(fResScale); +#endif + stroker.strokePath(src, dst); + return true; +} + +void SkStrokeRec::applyToPaint(SkPaint* paint) const { + if (fWidth < 0) { // fill + paint->setStyle(SkPaint::kFill_Style); + return; + } + + paint->setStyle(fStrokeAndFill ? SkPaint::kStrokeAndFill_Style : SkPaint::kStroke_Style); + paint->setStrokeWidth(fWidth); + paint->setStrokeMiter(fMiterLimit); + paint->setStrokeCap((SkPaint::Cap)fCap); + paint->setStrokeJoin((SkPaint::Join)fJoin); +} + +SkScalar SkStrokeRec::getInflationRadius() const { + return GetInflationRadius((SkPaint::Join)fJoin, fMiterLimit, (SkPaint::Cap)fCap, fWidth); +} + +SkScalar SkStrokeRec::GetInflationRadius(const SkPaint& paint, SkPaint::Style style) { + SkScalar width = SkPaint::kFill_Style == style ? -SK_Scalar1 : paint.getStrokeWidth(); + return GetInflationRadius(paint.getStrokeJoin(), paint.getStrokeMiter(), paint.getStrokeCap(), + width); + +} + +SkScalar SkStrokeRec::GetInflationRadius(SkPaint::Join join, SkScalar miterLimit, SkPaint::Cap cap, + SkScalar strokeWidth) { + if (strokeWidth < 0) { // fill + return 0; + } else if (0 == strokeWidth) { + // FIXME: We need a "matrixScale" parameter here in order to properly handle hairlines. + // Their with is determined in device space, unlike other strokes. + // http://skbug.com/8157 + return SK_Scalar1; + } + + // since we're stroked, outset the rect by the radius (and join type, caps) + SkScalar multiplier = SK_Scalar1; + if (SkPaint::kMiter_Join == join) { + multiplier = std::max(multiplier, miterLimit); + } + if (SkPaint::kSquare_Cap == cap) { + multiplier = std::max(multiplier, SK_ScalarSqrt2); + } + return strokeWidth/2 * multiplier; +} + diff --git a/gfx/skia/skia/src/core/SkStrokerPriv.cpp b/gfx/skia/skia/src/core/SkStrokerPriv.cpp new file mode 100644 index 0000000000..32cf9ecb4e --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrokerPriv.cpp @@ -0,0 +1,235 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkPointPriv.h" +#include "src/core/SkStrokerPriv.h" + +#include + +static void ButtCapper(SkPath* path, const SkPoint& pivot, const SkVector& normal, + const SkPoint& stop, SkPath*) { + path->lineTo(stop.fX, stop.fY); +} + +static void RoundCapper(SkPath* path, const SkPoint& pivot, const SkVector& normal, + const SkPoint& stop, SkPath*) { + SkVector parallel; + SkPointPriv::RotateCW(normal, ¶llel); + + SkPoint projectedCenter = pivot + parallel; + + path->conicTo(projectedCenter + normal, projectedCenter, SK_ScalarRoot2Over2); + path->conicTo(projectedCenter - normal, stop, SK_ScalarRoot2Over2); +} + +static void SquareCapper(SkPath* path, const SkPoint& pivot, const SkVector& normal, + const SkPoint& stop, SkPath* otherPath) { + SkVector parallel; + SkPointPriv::RotateCW(normal, ¶llel); + + if (otherPath) { + path->setLastPt(pivot.fX + normal.fX + parallel.fX, pivot.fY + normal.fY + parallel.fY); + path->lineTo(pivot.fX - normal.fX + parallel.fX, pivot.fY - normal.fY + parallel.fY); + } else { + path->lineTo(pivot.fX + normal.fX + parallel.fX, pivot.fY + normal.fY + parallel.fY); + path->lineTo(pivot.fX - normal.fX + parallel.fX, pivot.fY - normal.fY + parallel.fY); + path->lineTo(stop.fX, stop.fY); + } +} + +///////////////////////////////////////////////////////////////////////////// + +static bool is_clockwise(const SkVector& before, const SkVector& after) { + return before.fX * after.fY > before.fY * after.fX; +} + +enum AngleType { + kNearly180_AngleType, + kSharp_AngleType, + kShallow_AngleType, + kNearlyLine_AngleType +}; + +static AngleType Dot2AngleType(SkScalar dot) { +// need more precise fixed normalization +// SkASSERT(SkScalarAbs(dot) <= SK_Scalar1 + SK_ScalarNearlyZero); + + if (dot >= 0) { // shallow or line + return SkScalarNearlyZero(SK_Scalar1 - dot) ? kNearlyLine_AngleType : kShallow_AngleType; + } else { // sharp or 180 + return SkScalarNearlyZero(SK_Scalar1 + dot) ? kNearly180_AngleType : kSharp_AngleType; + } +} + +static void HandleInnerJoin(SkPath* inner, const SkPoint& pivot, const SkVector& after) { +#if 1 + /* In the degenerate case that the stroke radius is larger than our segments + just connecting the two inner segments may "show through" as a funny + diagonal. To pseudo-fix this, we go through the pivot point. This adds + an extra point/edge, but I can't see a cheap way to know when this is + not needed :( + */ + inner->lineTo(pivot.fX, pivot.fY); +#endif + + inner->lineTo(pivot.fX - after.fX, pivot.fY - after.fY); +} + +static void BluntJoiner(SkPath* outer, SkPath* inner, const SkVector& beforeUnitNormal, + const SkPoint& pivot, const SkVector& afterUnitNormal, + SkScalar radius, SkScalar invMiterLimit, bool, bool) { + SkVector after; + afterUnitNormal.scale(radius, &after); + + if (!is_clockwise(beforeUnitNormal, afterUnitNormal)) { + using std::swap; + swap(outer, inner); + after.negate(); + } + + outer->lineTo(pivot.fX + after.fX, pivot.fY + after.fY); + HandleInnerJoin(inner, pivot, after); +} + +static void RoundJoiner(SkPath* outer, SkPath* inner, const SkVector& beforeUnitNormal, + const SkPoint& pivot, const SkVector& afterUnitNormal, + SkScalar radius, SkScalar invMiterLimit, bool, bool) { + SkScalar dotProd = SkPoint::DotProduct(beforeUnitNormal, afterUnitNormal); + AngleType angleType = Dot2AngleType(dotProd); + + if (angleType == kNearlyLine_AngleType) + return; + + SkVector before = beforeUnitNormal; + SkVector after = afterUnitNormal; + SkRotationDirection dir = kCW_SkRotationDirection; + + if (!is_clockwise(before, after)) { + using std::swap; + swap(outer, inner); + before.negate(); + after.negate(); + dir = kCCW_SkRotationDirection; + } + + SkMatrix matrix; + matrix.setScale(radius, radius); + matrix.postTranslate(pivot.fX, pivot.fY); + SkConic conics[SkConic::kMaxConicsForArc]; + int count = SkConic::BuildUnitArc(before, after, dir, &matrix, conics); + if (count > 0) { + for (int i = 0; i < count; ++i) { + outer->conicTo(conics[i].fPts[1], conics[i].fPts[2], conics[i].fW); + } + after.scale(radius); + HandleInnerJoin(inner, pivot, after); + } +} + +#define kOneOverSqrt2 (0.707106781f) + +static void MiterJoiner(SkPath* outer, SkPath* inner, const SkVector& beforeUnitNormal, + const SkPoint& pivot, const SkVector& afterUnitNormal, + SkScalar radius, SkScalar invMiterLimit, + bool prevIsLine, bool currIsLine) { + // negate the dot since we're using normals instead of tangents + SkScalar dotProd = SkPoint::DotProduct(beforeUnitNormal, afterUnitNormal); + AngleType angleType = Dot2AngleType(dotProd); + SkVector before = beforeUnitNormal; + SkVector after = afterUnitNormal; + SkVector mid; + SkScalar sinHalfAngle; + bool ccw; + + if (angleType == kNearlyLine_AngleType) { + return; + } + if (angleType == kNearly180_AngleType) { + currIsLine = false; + goto DO_BLUNT; + } + + ccw = !is_clockwise(before, after); + if (ccw) { + using std::swap; + swap(outer, inner); + before.negate(); + after.negate(); + } + + /* Before we enter the world of square-roots and divides, + check if we're trying to join an upright right angle + (common case for stroking rectangles). If so, special case + that (for speed an accuracy). + Note: we only need to check one normal if dot==0 + */ + if (0 == dotProd && invMiterLimit <= kOneOverSqrt2) { + mid = (before + after) * radius; + goto DO_MITER; + } + + /* midLength = radius / sinHalfAngle + if (midLength > miterLimit * radius) abort + if (radius / sinHalf > miterLimit * radius) abort + if (1 / sinHalf > miterLimit) abort + if (1 / miterLimit > sinHalf) abort + My dotProd is opposite sign, since it is built from normals and not tangents + hence 1 + dot instead of 1 - dot in the formula + */ + sinHalfAngle = SkScalarSqrt(SkScalarHalf(SK_Scalar1 + dotProd)); + if (sinHalfAngle < invMiterLimit) { + currIsLine = false; + goto DO_BLUNT; + } + + // choose the most accurate way to form the initial mid-vector + if (angleType == kSharp_AngleType) { + mid.set(after.fY - before.fY, before.fX - after.fX); + if (ccw) { + mid.negate(); + } + } else { + mid.set(before.fX + after.fX, before.fY + after.fY); + } + + mid.setLength(radius / sinHalfAngle); +DO_MITER: + if (prevIsLine) { + outer->setLastPt(pivot.fX + mid.fX, pivot.fY + mid.fY); + } else { + outer->lineTo(pivot.fX + mid.fX, pivot.fY + mid.fY); + } + +DO_BLUNT: + after.scale(radius); + if (!currIsLine) { + outer->lineTo(pivot.fX + after.fX, pivot.fY + after.fY); + } + HandleInnerJoin(inner, pivot, after); +} + +///////////////////////////////////////////////////////////////////////////// + +SkStrokerPriv::CapProc SkStrokerPriv::CapFactory(SkPaint::Cap cap) { + const SkStrokerPriv::CapProc gCappers[] = { + ButtCapper, RoundCapper, SquareCapper + }; + + SkASSERT((unsigned)cap < SkPaint::kCapCount); + return gCappers[cap]; +} + +SkStrokerPriv::JoinProc SkStrokerPriv::JoinFactory(SkPaint::Join join) { + const SkStrokerPriv::JoinProc gJoiners[] = { + MiterJoiner, RoundJoiner, BluntJoiner + }; + + SkASSERT((unsigned)join < SkPaint::kJoinCount); + return gJoiners[join]; +} diff --git a/gfx/skia/skia/src/core/SkStrokerPriv.h b/gfx/skia/skia/src/core/SkStrokerPriv.h new file mode 100644 index 0000000000..a7294f7e27 --- /dev/null +++ b/gfx/skia/skia/src/core/SkStrokerPriv.h @@ -0,0 +1,43 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkStrokerPriv_DEFINED +#define SkStrokerPriv_DEFINED + +#include "src/core/SkStroke.h" + +#define CWX(x, y) (-y) +#define CWY(x, y) (x) +#define CCWX(x, y) (y) +#define CCWY(x, y) (-x) + +#define CUBIC_ARC_FACTOR ((SK_ScalarSqrt2 - SK_Scalar1) * 4 / 3) + +// this enables a global which is not thread-safe; doing so triggers a TSAN error in Chrome tests. +#define QUAD_STROKE_APPROX_EXTENDED_DEBUGGING 0 // set to 1 to enable debugging in StrokerTest.cpp + +class SkStrokerPriv { +public: + typedef void (*CapProc)(SkPath* path, + const SkPoint& pivot, + const SkVector& normal, + const SkPoint& stop, + SkPath* otherPath); + + typedef void (*JoinProc)(SkPath* outer, SkPath* inner, + const SkVector& beforeUnitNormal, + const SkPoint& pivot, + const SkVector& afterUnitNormal, + SkScalar radius, SkScalar invMiterLimit, + bool prevIsLine, bool currIsLine); + + static CapProc CapFactory(SkPaint::Cap); + static JoinProc JoinFactory(SkPaint::Join); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkSurfaceCharacterization.cpp b/gfx/skia/skia/src/core/SkSurfaceCharacterization.cpp new file mode 100644 index 0000000000..707c55b546 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSurfaceCharacterization.cpp @@ -0,0 +1,182 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkSurfaceCharacterization.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrContextThreadSafeProxyPriv.h" + +#ifdef SK_VULKAN +#include "include/gpu/vk/GrVkTypes.h" +#endif + +#ifdef SK_DEBUG +void SkSurfaceCharacterization::validate() const { + const GrCaps* caps = fContextInfo->priv().caps(); + + GrColorType grCT = SkColorTypeToGrColorType(this->colorType()); + SkASSERT(fSampleCnt && caps->isFormatAsColorTypeRenderable(grCT, fBackendFormat, fSampleCnt)); + + SkASSERT(caps->areColorTypeAndFormatCompatible(grCT, fBackendFormat)); + + SkASSERT(MipMapped::kNo == fIsMipMapped || Textureable::kYes == fIsTextureable); + SkASSERT(Textureable::kNo == fIsTextureable || UsesGLFBO0::kNo == fUsesGLFBO0); + auto backend = fBackendFormat.backend(); + SkASSERT(UsesGLFBO0::kNo == fUsesGLFBO0 || backend == GrBackendApi::kOpenGL); + SkASSERT((VulkanSecondaryCBCompatible::kNo == fVulkanSecondaryCBCompatible && + VkRTSupportsInputAttachment::kNo == fVkRTSupportsInputAttachment) || + backend == GrBackendApi::kVulkan); + SkASSERT(VulkanSecondaryCBCompatible::kNo == fVulkanSecondaryCBCompatible || + VkRTSupportsInputAttachment::kNo == fVkRTSupportsInputAttachment); + SkASSERT(Textureable::kNo == fIsTextureable || + VulkanSecondaryCBCompatible::kNo == fVulkanSecondaryCBCompatible); +} +#endif + + +bool SkSurfaceCharacterization::operator==(const SkSurfaceCharacterization& other) const { + if (!this->isValid() || !other.isValid()) { + return false; + } + + if (fContextInfo != other.fContextInfo) { + return false; + } + + return fCacheMaxResourceBytes == other.fCacheMaxResourceBytes && + fOrigin == other.fOrigin && + fImageInfo == other.fImageInfo && + fBackendFormat == other.fBackendFormat && + fSampleCnt == other.fSampleCnt && + fIsTextureable == other.fIsTextureable && + fIsMipMapped == other.fIsMipMapped && + fUsesGLFBO0 == other.fUsesGLFBO0 && + fVulkanSecondaryCBCompatible == other.fVulkanSecondaryCBCompatible && + fIsProtected == other.fIsProtected && + fSurfaceProps == other.fSurfaceProps; +} + +SkSurfaceCharacterization SkSurfaceCharacterization::createResized(int width, int height) const { + const GrCaps* caps = fContextInfo->priv().caps(); + if (!caps) { + return SkSurfaceCharacterization(); + } + + if (width <= 0 || height <= 0 || width > caps->maxRenderTargetSize() || + height > caps->maxRenderTargetSize()) { + return SkSurfaceCharacterization(); + } + + return SkSurfaceCharacterization(fContextInfo, fCacheMaxResourceBytes, + fImageInfo.makeWH(width, height), fBackendFormat, fOrigin, + fSampleCnt, fIsTextureable, fIsMipMapped, fUsesGLFBO0, + fVkRTSupportsInputAttachment, + fVulkanSecondaryCBCompatible, + fIsProtected, fSurfaceProps); +} + +SkSurfaceCharacterization SkSurfaceCharacterization::createColorSpace( + sk_sp cs) const { + if (!this->isValid()) { + return SkSurfaceCharacterization(); + } + + return SkSurfaceCharacterization(fContextInfo, fCacheMaxResourceBytes, + fImageInfo.makeColorSpace(std::move(cs)), fBackendFormat, + fOrigin, fSampleCnt, fIsTextureable, fIsMipMapped, fUsesGLFBO0, + fVkRTSupportsInputAttachment, + fVulkanSecondaryCBCompatible, fIsProtected, fSurfaceProps); +} + +SkSurfaceCharacterization SkSurfaceCharacterization::createBackendFormat( + SkColorType colorType, + const GrBackendFormat& backendFormat) const { + if (!this->isValid()) { + return SkSurfaceCharacterization(); + } + + SkImageInfo newII = fImageInfo.makeColorType(colorType); + + return SkSurfaceCharacterization(fContextInfo, fCacheMaxResourceBytes, newII, backendFormat, + fOrigin, fSampleCnt, fIsTextureable, fIsMipMapped, fUsesGLFBO0, + fVkRTSupportsInputAttachment, + fVulkanSecondaryCBCompatible, fIsProtected, fSurfaceProps); +} + +SkSurfaceCharacterization SkSurfaceCharacterization::createFBO0(bool usesGLFBO0) const { + if (!this->isValid()) { + return SkSurfaceCharacterization(); + } + + // We can't create an FBO0 characterization that is textureable or has any non-gl specific flags + if (fIsTextureable == Textureable::kYes || + fVkRTSupportsInputAttachment == VkRTSupportsInputAttachment::kYes || + fVulkanSecondaryCBCompatible == VulkanSecondaryCBCompatible::kYes) { + return SkSurfaceCharacterization(); + } + + return SkSurfaceCharacterization(fContextInfo, fCacheMaxResourceBytes, + fImageInfo, fBackendFormat, + fOrigin, fSampleCnt, fIsTextureable, fIsMipMapped, + usesGLFBO0 ? UsesGLFBO0::kYes : UsesGLFBO0::kNo, + fVkRTSupportsInputAttachment, + fVulkanSecondaryCBCompatible, fIsProtected, fSurfaceProps); +} + +bool SkSurfaceCharacterization::isCompatible(const GrBackendTexture& backendTex) const { + if (!this->isValid() || !backendTex.isValid()) { + return false; + } + + if (fBackendFormat != backendTex.getBackendFormat()) { + return false; + } + + if (this->usesGLFBO0()) { + // It is a backend texture so can't be wrapping FBO0 + return false; + } + + if (this->vulkanSecondaryCBCompatible()) { + return false; + } + + if (this->vkRTSupportsInputAttachment()) { + if (backendTex.backend() != GrBackendApi::kVulkan) { + return false; + } +#ifdef SK_VULKAN + GrVkImageInfo vkInfo; + if (!backendTex.getVkImageInfo(&vkInfo)) { + return false; + } + if (!SkToBool(vkInfo.fImageUsageFlags & VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT)) { + return false; + } +#endif // SK_VULKAN + } + + if (this->isMipMapped() && !backendTex.hasMipmaps()) { + // backend texture is allowed to have mipmaps even if the characterization doesn't require + // them. + return false; + } + + if (this->width() != backendTex.width() || this->height() != backendTex.height()) { + return false; + } + + if (this->isProtected() != GrProtected(backendTex.isProtected())) { + return false; + } + + return true; +} + + +#endif diff --git a/gfx/skia/skia/src/core/SkSurfacePriv.h b/gfx/skia/skia/src/core/SkSurfacePriv.h new file mode 100644 index 0000000000..26c70644f9 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSurfacePriv.h @@ -0,0 +1,23 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSurfacePriv_DEFINED +#define SkSurfacePriv_DEFINED + +#include "include/core/SkSurfaceProps.h" + +struct SkImageInfo; + +static inline SkSurfaceProps SkSurfacePropsCopyOrDefault(const SkSurfaceProps* props) { + return props ? *props : SkSurfaceProps(); +} + +constexpr size_t kIgnoreRowBytesValue = static_cast(~0); + +bool SkSurfaceValidateRasterInfo(const SkImageInfo&, size_t rb = kIgnoreRowBytesValue); + +#endif diff --git a/gfx/skia/skia/src/core/SkSwizzle.cpp b/gfx/skia/skia/src/core/SkSwizzle.cpp new file mode 100644 index 0000000000..301b0184f1 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSwizzle.cpp @@ -0,0 +1,14 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkSwizzle.h" + +#include "src/core/SkOpts.h" + +void SkSwapRB(uint32_t* dest, const uint32_t* src, int count) { + SkOpts::RGBA_to_BGRA(dest, src, count); +} diff --git a/gfx/skia/skia/src/core/SkSwizzlePriv.h b/gfx/skia/skia/src/core/SkSwizzlePriv.h new file mode 100644 index 0000000000..665d59ef37 --- /dev/null +++ b/gfx/skia/skia/src/core/SkSwizzlePriv.h @@ -0,0 +1,36 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkColorData.h" +#include "src/base/SkVx.h" + +#include + +static inline skvx::float4 swizzle_rb(const skvx::float4& x) { + return skvx::shuffle<2, 1, 0, 3>(x); +} + +static inline skvx::float4 swizzle_rb_if_bgra(const skvx::float4& x) { +#if defined(SK_PMCOLOR_IS_BGRA) + return swizzle_rb(x); +#else + return x; +#endif +} + +static inline skvx::float4 Sk4f_fromL32(uint32_t px) { + return skvx::cast(skvx::byte4::Load(&px)) * (1 / 255.0f); +} + +static inline uint32_t Sk4f_toL32(const skvx::float4& px) { + uint32_t l32; + // For the expected positive color values, the +0.5 before the pin and cast effectively rounds + // to the nearest int without having to call round() or lrint(). + skvx::cast(skvx::pin(px * 255.f + 0.5f, skvx::float4(0.f), skvx::float4(255.f))) + .store(&l32); + return l32; +} diff --git a/gfx/skia/skia/src/core/SkTDynamicHash.h b/gfx/skia/skia/src/core/SkTDynamicHash.h new file mode 100644 index 0000000000..11176a52ce --- /dev/null +++ b/gfx/skia/skia/src/core/SkTDynamicHash.h @@ -0,0 +1,58 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTDynamicHash_DEFINED +#define SkTDynamicHash_DEFINED + +// This is now a simple API wrapper around SkTHashTable; +// please just use SkTHash{Map,Set,Table} directly for new code. +#include "src/core/SkTHash.h" + +// Traits requires: +// static const Key& GetKey(const T&) { ... } +// static uint32_t Hash(const Key&) { ... } +// We'll look on T for these by default, or you can pass a custom Traits type. +template +class SkTDynamicHash { +public: + SkTDynamicHash() {} + + // It is not safe to call set() or remove() while iterating with either foreach(). + // If you mutate the entries be very careful not to change the Key. + + template // f(T*) + void foreach(Fn&& fn) { + fTable.foreach([&](T** entry) { fn(*entry); }); + } + template // f(T) or f(const T&) + void foreach(Fn&& fn) const { + fTable.foreach([&](T* entry) { fn(*entry); }); + } + + int count() const { return fTable.count(); } + + size_t approxBytesUsed() const { return fTable.approxBytesUsed(); } + + T* find(const Key& key) const { return fTable.findOrNull(key); } + + void add(T* entry) { fTable.set(entry); } + void remove(const Key& key) { fTable.remove(key); } + + void rewind() { fTable.reset(); } + void reset () { fTable.reset(); } + +private: + struct AdaptedTraits { + static const Key& GetKey(T* entry) { return Traits::GetKey(*entry); } + static uint32_t Hash(const Key& key) { return Traits::Hash(key); } + }; + SkTHashTable fTable; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkTHash.h b/gfx/skia/skia/src/core/SkTHash.h new file mode 100644 index 0000000000..e40b06652b --- /dev/null +++ b/gfx/skia/skia/src/core/SkTHash.h @@ -0,0 +1,591 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTHash_DEFINED +#define SkTHash_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/SkChecksum.h" +#include "include/private/base/SkTemplates.h" + +#include +#include +#include + +// Before trying to use SkTHashTable, look below to see if SkTHashMap or SkTHashSet works for you. +// They're easier to use, usually perform the same, and have fewer sharp edges. + +// T and K are treated as ordinary copyable C++ types. +// Traits must have: +// - static K GetKey(T) +// - static uint32_t Hash(K) +// If the key is large and stored inside T, you may want to make K a const&. +// Similarly, if T is large you might want it to be a pointer. +template +class SkTHashTable { +public: + SkTHashTable() = default; + ~SkTHashTable() = default; + + SkTHashTable(const SkTHashTable& that) { *this = that; } + SkTHashTable( SkTHashTable&& that) { *this = std::move(that); } + + SkTHashTable& operator=(const SkTHashTable& that) { + if (this != &that) { + fCount = that.fCount; + fCapacity = that.fCapacity; + fSlots.reset(that.fCapacity); + for (int i = 0; i < fCapacity; i++) { + fSlots[i] = that.fSlots[i]; + } + } + return *this; + } + + SkTHashTable& operator=(SkTHashTable&& that) { + if (this != &that) { + fCount = that.fCount; + fCapacity = that.fCapacity; + fSlots = std::move(that.fSlots); + + that.fCount = that.fCapacity = 0; + } + return *this; + } + + // Clear the table. + void reset() { *this = SkTHashTable(); } + + // How many entries are in the table? + int count() const { return fCount; } + + // How many slots does the table contain? (Note that unlike an array, hash tables can grow + // before reaching 100% capacity.) + int capacity() const { return fCapacity; } + + // Approximately how many bytes of memory do we use beyond sizeof(*this)? + size_t approxBytesUsed() const { return fCapacity * sizeof(Slot); } + + // !!!!!!!!!!!!!!!!! CAUTION !!!!!!!!!!!!!!!!! + // set(), find() and foreach() all allow mutable access to table entries. + // If you change an entry so that it no longer has the same key, all hell + // will break loose. Do not do that! + // + // Please prefer to use SkTHashMap or SkTHashSet, which do not have this danger. + + // The pointers returned by set() and find() are valid only until the next call to set(). + // The pointers you receive in foreach() are only valid for its duration. + + // Copy val into the hash table, returning a pointer to the copy now in the table. + // If there already is an entry in the table with the same key, we overwrite it. + T* set(T val) { + if (4 * fCount >= 3 * fCapacity) { + this->resize(fCapacity > 0 ? fCapacity * 2 : 4); + } + return this->uncheckedSet(std::move(val)); + } + + // If there is an entry in the table with this key, return a pointer to it. If not, null. + T* find(const K& key) const { + uint32_t hash = Hash(key); + int index = hash & (fCapacity-1); + for (int n = 0; n < fCapacity; n++) { + Slot& s = fSlots[index]; + if (s.empty()) { + return nullptr; + } + if (hash == s.fHash && key == Traits::GetKey(*s)) { + return &*s; + } + index = this->next(index); + } + SkASSERT(fCapacity == fCount); + return nullptr; + } + + // If there is an entry in the table with this key, return it. If not, null. + // This only works for pointer type T, and cannot be used to find an nullptr entry. + T findOrNull(const K& key) const { + if (T* p = this->find(key)) { + return *p; + } + return nullptr; + } + + // Remove the value with this key from the hash table. + void remove(const K& key) { + SkASSERT(this->find(key)); + + uint32_t hash = Hash(key); + int index = hash & (fCapacity-1); + for (int n = 0; n < fCapacity; n++) { + Slot& s = fSlots[index]; + SkASSERT(s.has_value()); + if (hash == s.fHash && key == Traits::GetKey(*s)) { + this->removeSlot(index); + if (4 * fCount <= fCapacity && fCapacity > 4) { + this->resize(fCapacity / 2); + } + return; + } + index = this->next(index); + } + } + + // Hash tables will automatically resize themselves when set() and remove() are called, but + // resize() can be called to manually grow capacity before a bulk insertion. + void resize(int capacity) { + SkASSERT(capacity >= fCount); + int oldCapacity = fCapacity; + SkDEBUGCODE(int oldCount = fCount); + + fCount = 0; + fCapacity = capacity; + skia_private::AutoTArray oldSlots = std::move(fSlots); + fSlots = skia_private::AutoTArray(capacity); + + for (int i = 0; i < oldCapacity; i++) { + Slot& s = oldSlots[i]; + if (s.has_value()) { + this->uncheckedSet(*std::move(s)); + } + } + SkASSERT(fCount == oldCount); + } + + // Call fn on every entry in the table. You may mutate the entries, but be very careful. + template // f(T*) + void foreach(Fn&& fn) { + for (int i = 0; i < fCapacity; i++) { + if (fSlots[i].has_value()) { + fn(&*fSlots[i]); + } + } + } + + // Call fn on every entry in the table. You may not mutate anything. + template // f(T) or f(const T&) + void foreach(Fn&& fn) const { + for (int i = 0; i < fCapacity; i++) { + if (fSlots[i].has_value()) { + fn(*fSlots[i]); + } + } + } + + // A basic iterator-like class which disallows mutation; sufficient for range-based for loops. + // Intended for use by SkTHashMap and SkTHashSet via begin() and end(). + // Adding or removing elements may invalidate all iterators. + template + class Iter { + public: + using TTable = SkTHashTable; + + Iter(const TTable* table, int slot) : fTable(table), fSlot(slot) {} + + static Iter MakeBegin(const TTable* table) { + return Iter{table, table->firstPopulatedSlot()}; + } + + static Iter MakeEnd(const TTable* table) { + return Iter{table, table->capacity()}; + } + + const SlotVal& operator*() const { + return *fTable->slot(fSlot); + } + + const SlotVal* operator->() const { + return fTable->slot(fSlot); + } + + bool operator==(const Iter& that) const { + // Iterators from different tables shouldn't be compared against each other. + SkASSERT(fTable == that.fTable); + return fSlot == that.fSlot; + } + + bool operator!=(const Iter& that) const { + return !(*this == that); + } + + Iter& operator++() { + fSlot = fTable->nextPopulatedSlot(fSlot); + return *this; + } + + Iter operator++(int) { + Iter old = *this; + this->operator++(); + return old; + } + + protected: + const TTable* fTable; + int fSlot; + }; + +private: + // Finds the first non-empty slot for an iterator. + int firstPopulatedSlot() const { + for (int i = 0; i < fCapacity; i++) { + if (fSlots[i].has_value()) { + return i; + } + } + return fCapacity; + } + + // Increments an iterator's slot. + int nextPopulatedSlot(int currentSlot) const { + for (int i = currentSlot + 1; i < fCapacity; i++) { + if (fSlots[i].has_value()) { + return i; + } + } + return fCapacity; + } + + // Reads from an iterator's slot. + const T* slot(int i) const { + SkASSERT(fSlots[i].has_value()); + return &*fSlots[i]; + } + + T* uncheckedSet(T&& val) { + const K& key = Traits::GetKey(val); + SkASSERT(key == key); + uint32_t hash = Hash(key); + int index = hash & (fCapacity-1); + for (int n = 0; n < fCapacity; n++) { + Slot& s = fSlots[index]; + if (s.empty()) { + // New entry. + s.emplace(std::move(val), hash); + fCount++; + return &*s; + } + if (hash == s.fHash && key == Traits::GetKey(*s)) { + // Overwrite previous entry. + // Note: this triggers extra copies when adding the same value repeatedly. + s.emplace(std::move(val), hash); + return &*s; + } + + index = this->next(index); + } + SkASSERT(false); + return nullptr; + } + + void removeSlot(int index) { + fCount--; + + // Rearrange elements to restore the invariants for linear probing. + for (;;) { + Slot& emptySlot = fSlots[index]; + int emptyIndex = index; + int originalIndex; + // Look for an element that can be moved into the empty slot. + // If the empty slot is in between where an element landed, and its native slot, then + // move it to the empty slot. Don't move it if its native slot is in between where + // the element landed and the empty slot. + // [native] <= [empty] < [candidate] == GOOD, can move candidate to empty slot + // [empty] < [native] < [candidate] == BAD, need to leave candidate where it is + do { + index = this->next(index); + Slot& s = fSlots[index]; + if (s.empty()) { + // We're done shuffling elements around. Clear the last empty slot. + emptySlot.reset(); + return; + } + originalIndex = s.fHash & (fCapacity - 1); + } while ((index <= originalIndex && originalIndex < emptyIndex) + || (originalIndex < emptyIndex && emptyIndex < index) + || (emptyIndex < index && index <= originalIndex)); + // Move the element to the empty slot. + Slot& moveFrom = fSlots[index]; + emptySlot = std::move(moveFrom); + } + } + + int next(int index) const { + index--; + if (index < 0) { index += fCapacity; } + return index; + } + + static uint32_t Hash(const K& key) { + uint32_t hash = Traits::Hash(key) & 0xffffffff; + return hash ? hash : 1; // We reserve hash 0 to mark empty. + } + + class Slot { + public: + Slot() = default; + ~Slot() { this->reset(); } + + Slot(const Slot& that) { *this = that; } + Slot& operator=(const Slot& that) { + if (this == &that) { + return *this; + } + if (fHash) { + if (that.fHash) { + fVal.fStorage = that.fVal.fStorage; + fHash = that.fHash; + } else { + this->reset(); + } + } else { + if (that.fHash) { + new (&fVal.fStorage) T(that.fVal.fStorage); + fHash = that.fHash; + } else { + // do nothing, no value on either side + } + } + return *this; + } + + Slot(Slot&& that) { *this = std::move(that); } + Slot& operator=(Slot&& that) { + if (this == &that) { + return *this; + } + if (fHash) { + if (that.fHash) { + fVal.fStorage = std::move(that.fVal.fStorage); + fHash = that.fHash; + } else { + this->reset(); + } + } else { + if (that.fHash) { + new (&fVal.fStorage) T(std::move(that.fVal.fStorage)); + fHash = that.fHash; + } else { + // do nothing, no value on either side + } + } + return *this; + } + + T& operator*() & { return fVal.fStorage; } + const T& operator*() const& { return fVal.fStorage; } + T&& operator*() && { return std::move(fVal.fStorage); } + const T&& operator*() const&& { return std::move(fVal.fStorage); } + + Slot& emplace(T&& v, uint32_t h) { + this->reset(); + new (&fVal.fStorage) T(std::move(v)); + fHash = h; + return *this; + } + + bool has_value() const { return fHash != 0; } + explicit operator bool() const { return this->has_value(); } + bool empty() const { return !this->has_value(); } + + void reset() { + if (fHash) { + fVal.fStorage.~T(); + fHash = 0; + } + } + + uint32_t fHash = 0; + + private: + union Storage { + T fStorage; + Storage() {} + ~Storage() {} + } fVal; + }; + + int fCount = 0, + fCapacity = 0; + skia_private::AutoTArray fSlots; +}; + +// Maps K->V. A more user-friendly wrapper around SkTHashTable, suitable for most use cases. +// K and V are treated as ordinary copyable C++ types, with no assumed relationship between the two. +template +class SkTHashMap { +public: + // Allow default construction and assignment. + SkTHashMap() = default; + + SkTHashMap(SkTHashMap&& that) = default; + SkTHashMap(const SkTHashMap& that) = default; + + SkTHashMap& operator=(SkTHashMap&& that) = default; + SkTHashMap& operator=(const SkTHashMap& that) = default; + + // Construct with an initializer list of key-value pairs. + struct Pair : public std::pair { + using std::pair::pair; + static const K& GetKey(const Pair& p) { return p.first; } + static auto Hash(const K& key) { return HashK()(key); } + }; + + SkTHashMap(std::initializer_list pairs) { + fTable.resize(pairs.size() * 5 / 3); + for (const Pair& p : pairs) { + fTable.set(p); + } + } + + // Clear the map. + void reset() { fTable.reset(); } + + // How many key/value pairs are in the table? + int count() const { return fTable.count(); } + + // Is empty? + bool empty() const { return fTable.count() == 0; } + + // Approximately how many bytes of memory do we use beyond sizeof(*this)? + size_t approxBytesUsed() const { return fTable.approxBytesUsed(); } + + // N.B. The pointers returned by set() and find() are valid only until the next call to set(). + + // Set key to val in the table, replacing any previous value with the same key. + // We copy both key and val, and return a pointer to the value copy now in the table. + V* set(K key, V val) { + Pair* out = fTable.set({std::move(key), std::move(val)}); + return &out->second; + } + + // If there is key/value entry in the table with this key, return a pointer to the value. + // If not, return null. + V* find(const K& key) const { + if (Pair* p = fTable.find(key)) { + return &p->second; + } + return nullptr; + } + + V& operator[](const K& key) { + if (V* val = this->find(key)) { + return *val; + } + return *this->set(key, V{}); + } + + // Remove the key/value entry in the table with this key. + void remove(const K& key) { + SkASSERT(this->find(key)); + fTable.remove(key); + } + + // Call fn on every key/value pair in the table. You may mutate the value but not the key. + template // f(K, V*) or f(const K&, V*) + void foreach(Fn&& fn) { + fTable.foreach([&fn](Pair* p){ fn(p->first, &p->second); }); + } + + // Call fn on every key/value pair in the table. You may not mutate anything. + template // f(K, V), f(const K&, V), f(K, const V&) or f(const K&, const V&). + void foreach(Fn&& fn) const { + fTable.foreach([&fn](const Pair& p){ fn(p.first, p.second); }); + } + + // Dereferencing an iterator gives back a key-value pair, suitable for structured binding. + using Iter = typename SkTHashTable::template Iter>; + + Iter begin() const { + return Iter::MakeBegin(&fTable); + } + + Iter end() const { + return Iter::MakeEnd(&fTable); + } + +private: + SkTHashTable fTable; +}; + +// A set of T. T is treated as an ordinary copyable C++ type. +template +class SkTHashSet { +public: + // Allow default construction and assignment. + SkTHashSet() = default; + + SkTHashSet(SkTHashSet&& that) = default; + SkTHashSet(const SkTHashSet& that) = default; + + SkTHashSet& operator=(SkTHashSet&& that) = default; + SkTHashSet& operator=(const SkTHashSet& that) = default; + + // Construct with an initializer list of Ts. + SkTHashSet(std::initializer_list vals) { + fTable.resize(vals.size() * 5 / 3); + for (const T& val : vals) { + fTable.set(val); + } + } + + // Clear the set. + void reset() { fTable.reset(); } + + // How many items are in the set? + int count() const { return fTable.count(); } + + // Is empty? + bool empty() const { return fTable.count() == 0; } + + // Approximately how many bytes of memory do we use beyond sizeof(*this)? + size_t approxBytesUsed() const { return fTable.approxBytesUsed(); } + + // Copy an item into the set. + void add(T item) { fTable.set(std::move(item)); } + + // Is this item in the set? + bool contains(const T& item) const { return SkToBool(this->find(item)); } + + // If an item equal to this is in the set, return a pointer to it, otherwise null. + // This pointer remains valid until the next call to add(). + const T* find(const T& item) const { return fTable.find(item); } + + // Remove the item in the set equal to this. + void remove(const T& item) { + SkASSERT(this->contains(item)); + fTable.remove(item); + } + + // Call fn on every item in the set. You may not mutate anything. + template // f(T), f(const T&) + void foreach (Fn&& fn) const { + fTable.foreach(fn); + } + +private: + struct Traits { + static const T& GetKey(const T& item) { return item; } + static auto Hash(const T& item) { return HashT()(item); } + }; + +public: + using Iter = typename SkTHashTable::template Iter; + + Iter begin() const { + return Iter::MakeBegin(&fTable); + } + + Iter end() const { + return Iter::MakeEnd(&fTable); + } + +private: + SkTHashTable fTable; +}; + +#endif//SkTHash_DEFINED diff --git a/gfx/skia/skia/src/core/SkTMultiMap.h b/gfx/skia/skia/src/core/SkTMultiMap.h new file mode 100644 index 0000000000..c4df7c78d7 --- /dev/null +++ b/gfx/skia/skia/src/core/SkTMultiMap.h @@ -0,0 +1,187 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTMultiMap_DEFINED +#define SkTMultiMap_DEFINED + +#include "src/core/SkTDynamicHash.h" + +/** A set that contains pointers to instances of T. Instances can be looked up with key Key. + * Multiple (possibly same) values can have the same key. + */ +template +class SkTMultiMap { + struct ValueList { + explicit ValueList(T* value) : fValue(value), fNext(nullptr) {} + + static const Key& GetKey(const ValueList& e) { return HashTraits::GetKey(*e.fValue); } + static uint32_t Hash(const Key& key) { return HashTraits::Hash(key); } + T* fValue; + ValueList* fNext; + }; +public: + SkTMultiMap() : fCount(0) {} + + ~SkTMultiMap() { + this->reset(); + } + + void reset() { + fHash.foreach([&](ValueList* vl) { + ValueList* next; + for (ValueList* it = vl; it; it = next) { + HashTraits::OnFree(it->fValue); + next = it->fNext; + delete it; + } + }); + fHash.reset(); + fCount = 0; + } + + void insert(const Key& key, T* value) { + ValueList* list = fHash.find(key); + if (list) { + // The new ValueList entry is inserted as the second element in the + // linked list, and it will contain the value of the first element. + ValueList* newEntry = new ValueList(list->fValue); + newEntry->fNext = list->fNext; + // The existing first ValueList entry is updated to contain the + // inserted value. + list->fNext = newEntry; + list->fValue = value; + } else { + fHash.add(new ValueList(value)); + } + + ++fCount; + } + + void remove(const Key& key, const T* value) { + ValueList* list = fHash.find(key); + // Temporarily making this safe for remove entries not in the map because of + // crbug.com/877915. +#if 0 + // Since we expect the caller to be fully aware of what is stored, just + // assert that the caller removes an existing value. + SkASSERT(list); + ValueList* prev = nullptr; + while (list->fValue != value) { + prev = list; + list = list->fNext; + } + this->internalRemove(prev, list, key); +#else + ValueList* prev = nullptr; + while (list && list->fValue != value) { + prev = list; + list = list->fNext; + } + // Crash in Debug since it'd be great to detect a repro of 877915. + SkASSERT(list); + if (list) { + this->internalRemove(prev, list, key); + } +#endif + } + + T* find(const Key& key) const { + ValueList* list = fHash.find(key); + if (list) { + return list->fValue; + } + return nullptr; + } + + template + T* find(const Key& key, const FindPredicate f) { + ValueList* list = fHash.find(key); + while (list) { + if (f(list->fValue)){ + return list->fValue; + } + list = list->fNext; + } + return nullptr; + } + + template + T* findAndRemove(const Key& key, const FindPredicate f) { + ValueList* list = fHash.find(key); + + ValueList* prev = nullptr; + while (list) { + if (f(list->fValue)){ + T* value = list->fValue; + this->internalRemove(prev, list, key); + return value; + } + prev = list; + list = list->fNext; + } + return nullptr; + } + + int count() const { return fCount; } + +#ifdef SK_DEBUG + template // f(T) or f(const T&) + void foreach(Fn&& fn) const { + fHash.foreach([&](const ValueList& vl) { + for (const ValueList* it = &vl; it; it = it->fNext) { + fn(*it->fValue); + } + }); + } + + bool has(const T* value, const Key& key) const { + for (ValueList* list = fHash.find(key); list; list = list->fNext) { + if (list->fValue == value) { + return true; + } + } + return false; + } + + // This is not particularly fast and only used for validation, so debug only. + int countForKey(const Key& key) const { + int count = 0; + ValueList* list = fHash.find(key); + while (list) { + list = list->fNext; + ++count; + } + return count; + } +#endif + +private: + SkTDynamicHash fHash; + int fCount; + + void internalRemove(ValueList* prev, ValueList* elem, const Key& key) { + if (elem->fNext) { + ValueList* next = elem->fNext; + elem->fValue = next->fValue; + elem->fNext = next->fNext; + delete next; + } else if (prev) { + prev->fNext = nullptr; + delete elem; + } else { + fHash.remove(key); + delete elem; + } + + --fCount; + } + +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkTaskGroup.cpp b/gfx/skia/skia/src/core/SkTaskGroup.cpp new file mode 100644 index 0000000000..8199a9b975 --- /dev/null +++ b/gfx/skia/skia/src/core/SkTaskGroup.cpp @@ -0,0 +1,53 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkExecutor.h" +#include "src/core/SkTaskGroup.h" + +#include + +SkTaskGroup::SkTaskGroup(SkExecutor& executor) : fPending(0), fExecutor(executor) {} + +void SkTaskGroup::add(std::function fn) { + fPending.fetch_add(+1, std::memory_order_relaxed); + fExecutor.add([this, fn{std::move(fn)}] { + fn(); + fPending.fetch_add(-1, std::memory_order_release); + }); +} + +void SkTaskGroup::batch(int N, std::function fn) { + // TODO: I really thought we had some sort of more clever chunking logic. + fPending.fetch_add(+N, std::memory_order_relaxed); + for (int i = 0; i < N; i++) { + fExecutor.add([=] { + fn(i); + fPending.fetch_add(-1, std::memory_order_release); + }); + } +} + +bool SkTaskGroup::done() const { + return fPending.load(std::memory_order_acquire) == 0; +} + +void SkTaskGroup::wait() { + // Actively help the executor do work until our task group is done. + // This lets SkTaskGroups nest arbitrarily deep on a single SkExecutor: + // no thread ever blocks waiting for others to do its work. + // (We may end up doing work that's not part of our task group. That's fine.) + while (!this->done()) { + fExecutor.borrow(); + } +} + +SkTaskGroup::Enabler::Enabler(int threads) { + if (threads) { + fThreadPool = SkExecutor::MakeLIFOThreadPool(threads); + SkExecutor::SetDefault(fThreadPool.get()); + } +} diff --git a/gfx/skia/skia/src/core/SkTaskGroup.h b/gfx/skia/skia/src/core/SkTaskGroup.h new file mode 100644 index 0000000000..36f444617b --- /dev/null +++ b/gfx/skia/skia/src/core/SkTaskGroup.h @@ -0,0 +1,48 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTaskGroup_DEFINED +#define SkTaskGroup_DEFINED + +#include "include/core/SkExecutor.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkNoncopyable.h" +#include +#include + +class SkTaskGroup : SkNoncopyable { +public: + // Tasks added to this SkTaskGroup will run on its executor. + explicit SkTaskGroup(SkExecutor& executor = SkExecutor::GetDefault()); + ~SkTaskGroup() { this->wait(); } + + // Add a task to this SkTaskGroup. + void add(std::function fn); + + // Add a batch of N tasks, all calling fn with different arguments. + void batch(int N, std::function fn); + + // Returns true if all Tasks previously add()ed to this SkTaskGroup have run. + // It is safe to reuse this SkTaskGroup once done(). + bool done() const; + + // Block until done(). + void wait(); + + // A convenience for testing tools. + // Creates and owns a thread pool, and passes it to SkExecutor::SetDefault(). + struct Enabler { + explicit Enabler(int threads = -1); // -1 -> num_cores, 0 -> noop + std::unique_ptr fThreadPool; + }; + +private: + std::atomic fPending; + SkExecutor& fExecutor; +}; + +#endif//SkTaskGroup_DEFINED diff --git a/gfx/skia/skia/src/core/SkTextBlob.cpp b/gfx/skia/skia/src/core/SkTextBlob.cpp new file mode 100644 index 0000000000..b1dadfdf47 --- /dev/null +++ b/gfx/skia/skia/src/core/SkTextBlob.cpp @@ -0,0 +1,1009 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTextBlob.h" + +#include "include/core/SkRSXform.h" +#include "include/core/SkTypeface.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkStrikeSpec.h" +#include "src/core/SkTextBlobPriv.h" +#include "src/core/SkWriteBuffer.h" +#include "src/text/GlyphRun.h" + +#include +#include +#include + +#if defined(SK_GANESH) || defined(SK_GRAPHITE) +#include "src/text/gpu/TextBlobRedrawCoordinator.h" +#endif + +using namespace skia_private; + +namespace { +struct RunFontStorageEquivalent { + SkScalar fSize, fScaleX; + void* fTypeface; + SkScalar fSkewX; + uint32_t fFlags; +}; +static_assert(sizeof(SkFont) == sizeof(RunFontStorageEquivalent), "runfont_should_stay_packed"); +} // namespace + +size_t SkTextBlob::RunRecord::StorageSize(uint32_t glyphCount, uint32_t textSize, + SkTextBlob::GlyphPositioning positioning, + SkSafeMath* safe) { + static_assert(SkIsAlign4(sizeof(SkScalar)), "SkScalar size alignment"); + + auto glyphSize = safe->mul(glyphCount, sizeof(uint16_t)), + posSize = safe->mul(PosCount(glyphCount, positioning, safe), sizeof(SkScalar)); + + // RunRecord object + (aligned) glyph buffer + position buffer + auto size = sizeof(SkTextBlob::RunRecord); + size = safe->add(size, safe->alignUp(glyphSize, 4)); + size = safe->add(size, posSize); + + if (textSize) { // Extended run. + size = safe->add(size, sizeof(uint32_t)); + size = safe->add(size, safe->mul(glyphCount, sizeof(uint32_t))); + size = safe->add(size, textSize); + } + + return safe->alignUp(size, sizeof(void*)); +} + +const SkTextBlob::RunRecord* SkTextBlob::RunRecord::First(const SkTextBlob* blob) { + // The first record (if present) is stored following the blob object. + // (aligned up to make the RunRecord aligned too) + return reinterpret_cast(SkAlignPtr((uintptr_t)(blob + 1))); +} + +const SkTextBlob::RunRecord* SkTextBlob::RunRecord::Next(const RunRecord* run) { + return SkToBool(run->fFlags & kLast_Flag) ? nullptr : NextUnchecked(run); +} + +namespace { +struct RunRecordStorageEquivalent { + SkFont fFont; + SkPoint fOffset; + uint32_t fCount; + uint32_t fFlags; + SkDEBUGCODE(unsigned fMagic;) +}; +} // namespace + +void SkTextBlob::RunRecord::validate(const uint8_t* storageTop) const { + SkASSERT(kRunRecordMagic == fMagic); + SkASSERT((uint8_t*)NextUnchecked(this) <= storageTop); + + SkASSERT(glyphBuffer() + fCount <= (uint16_t*)posBuffer()); + SkASSERT(posBuffer() + fCount * ScalarsPerGlyph(positioning()) + <= (SkScalar*)NextUnchecked(this)); + if (isExtended()) { + SkASSERT(textSize() > 0); + SkASSERT(textSizePtr() < (uint32_t*)NextUnchecked(this)); + SkASSERT(clusterBuffer() < (uint32_t*)NextUnchecked(this)); + SkASSERT(textBuffer() + textSize() <= (char*)NextUnchecked(this)); + } + static_assert(sizeof(SkTextBlob::RunRecord) == sizeof(RunRecordStorageEquivalent), + "runrecord_should_stay_packed"); +} + +const SkTextBlob::RunRecord* SkTextBlob::RunRecord::NextUnchecked(const RunRecord* run) { + SkSafeMath safe; + auto res = reinterpret_cast( + reinterpret_cast(run) + + StorageSize(run->glyphCount(), run->textSize(), run->positioning(), &safe)); + SkASSERT(safe); + return res; +} + +size_t SkTextBlob::RunRecord::PosCount(uint32_t glyphCount, + SkTextBlob::GlyphPositioning positioning, + SkSafeMath* safe) { + return safe->mul(glyphCount, ScalarsPerGlyph(positioning)); +} + +uint32_t* SkTextBlob::RunRecord::textSizePtr() const { + // textSize follows the position buffer. + SkASSERT(isExtended()); + SkSafeMath safe; + auto res = (uint32_t*)(&this->posBuffer()[PosCount(fCount, positioning(), &safe)]); + SkASSERT(safe); + return res; +} + +void SkTextBlob::RunRecord::grow(uint32_t count) { + SkScalar* initialPosBuffer = posBuffer(); + uint32_t initialCount = fCount; + fCount += count; + + // Move the initial pos scalars to their new location. + size_t copySize = initialCount * sizeof(SkScalar) * ScalarsPerGlyph(positioning()); + SkASSERT((uint8_t*)posBuffer() + copySize <= (uint8_t*)NextUnchecked(this)); + + // memmove, as the buffers may overlap + memmove(posBuffer(), initialPosBuffer, copySize); +} + +static int32_t next_id() { + static std::atomic nextID{1}; + int32_t id; + do { + id = nextID.fetch_add(1, std::memory_order_relaxed); + } while (id == SK_InvalidGenID); + return id; +} + +SkTextBlob::SkTextBlob(const SkRect& bounds) + : fBounds(bounds) + , fUniqueID(next_id()) + , fCacheID(SK_InvalidUniqueID) {} + +SkTextBlob::~SkTextBlob() { +#if defined(SK_GANESH) || defined(SK_GRAPHITE) + if (SK_InvalidUniqueID != fCacheID.load()) { + sktext::gpu::TextBlobRedrawCoordinator::PostPurgeBlobMessage(fUniqueID, fCacheID); + } +#endif + + const auto* run = RunRecord::First(this); + do { + const auto* nextRun = RunRecord::Next(run); + SkDEBUGCODE(run->validate((uint8_t*)this + fStorageSize);) + run->~RunRecord(); + run = nextRun; + } while (run); +} + +namespace { + +union PositioningAndExtended { + int32_t intValue; + struct { + uint8_t positioning; + uint8_t extended; + uint16_t padding; + }; +}; + +static_assert(sizeof(PositioningAndExtended) == sizeof(int32_t), ""); + +} // namespace + +enum SkTextBlob::GlyphPositioning : uint8_t { + kDefault_Positioning = 0, // Default glyph advances -- zero scalars per glyph. + kHorizontal_Positioning = 1, // Horizontal positioning -- one scalar per glyph. + kFull_Positioning = 2, // Point positioning -- two scalars per glyph. + kRSXform_Positioning = 3, // RSXform positioning -- four scalars per glyph. +}; + +unsigned SkTextBlob::ScalarsPerGlyph(GlyphPositioning pos) { + const uint8_t gScalarsPerPositioning[] = { + 0, // kDefault_Positioning + 1, // kHorizontal_Positioning + 2, // kFull_Positioning + 4, // kRSXform_Positioning + }; + SkASSERT((unsigned)pos <= 3); + return gScalarsPerPositioning[pos]; +} + +void SkTextBlob::operator delete(void* p) { + sk_free(p); +} + +void* SkTextBlob::operator new(size_t) { + SK_ABORT("All blobs are created by placement new."); +} + +void* SkTextBlob::operator new(size_t, void* p) { + return p; +} + +SkTextBlobRunIterator::SkTextBlobRunIterator(const SkTextBlob* blob) + : fCurrentRun(SkTextBlob::RunRecord::First(blob)) { + SkDEBUGCODE(fStorageTop = (uint8_t*)blob + blob->fStorageSize;) +} + +void SkTextBlobRunIterator::next() { + SkASSERT(!this->done()); + + if (!this->done()) { + SkDEBUGCODE(fCurrentRun->validate(fStorageTop);) + fCurrentRun = SkTextBlob::RunRecord::Next(fCurrentRun); + } +} + +SkTextBlobRunIterator::GlyphPositioning SkTextBlobRunIterator::positioning() const { + SkASSERT(!this->done()); + static_assert(static_cast(SkTextBlob::kDefault_Positioning) == + kDefault_Positioning, ""); + static_assert(static_cast(SkTextBlob::kHorizontal_Positioning) == + kHorizontal_Positioning, ""); + static_assert(static_cast(SkTextBlob::kFull_Positioning) == + kFull_Positioning, ""); + static_assert(static_cast(SkTextBlob::kRSXform_Positioning) == + kRSXform_Positioning, ""); + + return SkTo(fCurrentRun->positioning()); +} + +unsigned SkTextBlobRunIterator::scalarsPerGlyph() const { + return SkTextBlob::ScalarsPerGlyph(fCurrentRun->positioning()); +} + +bool SkTextBlobRunIterator::isLCD() const { + return fCurrentRun->font().getEdging() == SkFont::Edging::kSubpixelAntiAlias; +} + +SkTextBlobBuilder::SkTextBlobBuilder() + : fStorageSize(0) + , fStorageUsed(0) + , fRunCount(0) + , fDeferredBounds(false) + , fLastRun(0) { + fBounds.setEmpty(); +} + +SkTextBlobBuilder::~SkTextBlobBuilder() { + if (nullptr != fStorage.get()) { + // We are abandoning runs and must destruct the associated font data. + // The easiest way to accomplish that is to use the blob destructor. + this->make(); + } +} + +static SkRect map_quad_to_rect(const SkRSXform& xform, const SkRect& rect) { + return SkMatrix().setRSXform(xform).mapRect(rect); +} + +SkRect SkTextBlobBuilder::TightRunBounds(const SkTextBlob::RunRecord& run) { + const SkFont& font = run.font(); + SkRect bounds; + + if (SkTextBlob::kDefault_Positioning == run.positioning()) { + font.measureText(run.glyphBuffer(), run.glyphCount() * sizeof(uint16_t), + SkTextEncoding::kGlyphID, &bounds); + return bounds.makeOffset(run.offset().x(), run.offset().y()); + } + + AutoSTArray<16, SkRect> glyphBounds(run.glyphCount()); + font.getBounds(run.glyphBuffer(), run.glyphCount(), glyphBounds.get(), nullptr); + + if (SkTextBlob::kRSXform_Positioning == run.positioning()) { + bounds.setEmpty(); + const SkRSXform* xform = run.xformBuffer(); + SkASSERT((void*)(xform + run.glyphCount()) <= SkTextBlob::RunRecord::Next(&run)); + for (unsigned i = 0; i < run.glyphCount(); ++i) { + bounds.join(map_quad_to_rect(xform[i], glyphBounds[i])); + } + } else { + SkASSERT(SkTextBlob::kFull_Positioning == run.positioning() || + SkTextBlob::kHorizontal_Positioning == run.positioning()); + // kFull_Positioning => [ x, y, x, y... ] + // kHorizontal_Positioning => [ x, x, x... ] + // (const y applied by runBounds.offset(run->offset()) later) + const SkScalar horizontalConstY = 0; + const SkScalar* glyphPosX = run.posBuffer(); + const SkScalar* glyphPosY = (run.positioning() == SkTextBlob::kFull_Positioning) ? + glyphPosX + 1 : &horizontalConstY; + const unsigned posXInc = SkTextBlob::ScalarsPerGlyph(run.positioning()); + const unsigned posYInc = (run.positioning() == SkTextBlob::kFull_Positioning) ? + posXInc : 0; + + bounds.setEmpty(); + for (unsigned i = 0; i < run.glyphCount(); ++i) { + bounds.join(glyphBounds[i].makeOffset(*glyphPosX, *glyphPosY)); + glyphPosX += posXInc; + glyphPosY += posYInc; + } + + SkASSERT((void*)glyphPosX <= SkTextBlob::RunRecord::Next(&run)); + } + return bounds.makeOffset(run.offset().x(), run.offset().y()); +} + +SkRect SkTextBlobBuilder::ConservativeRunBounds(const SkTextBlob::RunRecord& run) { + SkASSERT(run.glyphCount() > 0); + SkASSERT(SkTextBlob::kFull_Positioning == run.positioning() || + SkTextBlob::kHorizontal_Positioning == run.positioning() || + SkTextBlob::kRSXform_Positioning == run.positioning()); + + const SkRect fontBounds = SkFontPriv::GetFontBounds(run.font()); + if (fontBounds.isEmpty()) { + // Empty font bounds are likely a font bug. TightBounds has a better chance of + // producing useful results in this case. + return TightRunBounds(run); + } + + // Compute the glyph position bbox. + SkRect bounds; + switch (run.positioning()) { + case SkTextBlob::kHorizontal_Positioning: { + const SkScalar* glyphPos = run.posBuffer(); + SkASSERT((void*)(glyphPos + run.glyphCount()) <= SkTextBlob::RunRecord::Next(&run)); + + SkScalar minX = *glyphPos; + SkScalar maxX = *glyphPos; + for (unsigned i = 1; i < run.glyphCount(); ++i) { + SkScalar x = glyphPos[i]; + minX = std::min(x, minX); + maxX = std::max(x, maxX); + } + + bounds.setLTRB(minX, 0, maxX, 0); + } break; + case SkTextBlob::kFull_Positioning: { + const SkPoint* glyphPosPts = run.pointBuffer(); + SkASSERT((void*)(glyphPosPts + run.glyphCount()) <= SkTextBlob::RunRecord::Next(&run)); + + bounds.setBounds(glyphPosPts, run.glyphCount()); + } break; + case SkTextBlob::kRSXform_Positioning: { + const SkRSXform* xform = run.xformBuffer(); + SkASSERT((void*)(xform + run.glyphCount()) <= SkTextBlob::RunRecord::Next(&run)); + bounds.setEmpty(); + for (unsigned i = 0; i < run.glyphCount(); ++i) { + bounds.join(map_quad_to_rect(xform[i], fontBounds)); + } + } break; + default: + SK_ABORT("unsupported positioning mode"); + } + + if (run.positioning() != SkTextBlob::kRSXform_Positioning) { + // Expand by typeface glyph bounds. + bounds.fLeft += fontBounds.left(); + bounds.fTop += fontBounds.top(); + bounds.fRight += fontBounds.right(); + bounds.fBottom += fontBounds.bottom(); + } + + // Offset by run position. + return bounds.makeOffset(run.offset().x(), run.offset().y()); +} + +void SkTextBlobBuilder::updateDeferredBounds() { + SkASSERT(!fDeferredBounds || fRunCount > 0); + + if (!fDeferredBounds) { + return; + } + + SkASSERT(fLastRun >= SkAlignPtr(sizeof(SkTextBlob))); + SkTextBlob::RunRecord* run = reinterpret_cast(fStorage.get() + + fLastRun); + + // FIXME: we should also use conservative bounds for kDefault_Positioning. + SkRect runBounds = SkTextBlob::kDefault_Positioning == run->positioning() ? + TightRunBounds(*run) : ConservativeRunBounds(*run); + fBounds.join(runBounds); + fDeferredBounds = false; +} + +void SkTextBlobBuilder::reserve(size_t size) { + SkSafeMath safe; + + // We don't currently pre-allocate, but maybe someday... + if (safe.add(fStorageUsed, size) <= fStorageSize && safe) { + return; + } + + if (0 == fRunCount) { + SkASSERT(nullptr == fStorage.get()); + SkASSERT(0 == fStorageSize); + SkASSERT(0 == fStorageUsed); + + // the first allocation also includes blob storage + // aligned up to a pointer alignment so SkTextBlob::RunRecords after it stay aligned. + fStorageUsed = SkAlignPtr(sizeof(SkTextBlob)); + } + + fStorageSize = safe.add(fStorageUsed, size); + + // FYI: This relies on everything we store being relocatable, particularly SkPaint. + // Also, this is counting on the underlying realloc to throw when passed max(). + fStorage.realloc(safe ? fStorageSize : std::numeric_limits::max()); +} + +bool SkTextBlobBuilder::mergeRun(const SkFont& font, SkTextBlob::GlyphPositioning positioning, + uint32_t count, SkPoint offset) { + if (0 == fLastRun) { + SkASSERT(0 == fRunCount); + return false; + } + + SkASSERT(fLastRun >= SkAlignPtr(sizeof(SkTextBlob))); + SkTextBlob::RunRecord* run = reinterpret_cast(fStorage.get() + + fLastRun); + SkASSERT(run->glyphCount() > 0); + + if (run->textSize() != 0) { + return false; + } + + if (run->positioning() != positioning + || run->font() != font + || (run->glyphCount() + count < run->glyphCount())) { + return false; + } + + // we can merge same-font/same-positioning runs in the following cases: + // * fully positioned run following another fully positioned run + // * horizontally postioned run following another horizontally positioned run with the same + // y-offset + if (SkTextBlob::kFull_Positioning != positioning + && (SkTextBlob::kHorizontal_Positioning != positioning + || run->offset().y() != offset.y())) { + return false; + } + + SkSafeMath safe; + size_t sizeDelta = + SkTextBlob::RunRecord::StorageSize(run->glyphCount() + count, 0, positioning, &safe) - + SkTextBlob::RunRecord::StorageSize(run->glyphCount() , 0, positioning, &safe); + if (!safe) { + return false; + } + + this->reserve(sizeDelta); + + // reserve may have realloced + run = reinterpret_cast(fStorage.get() + fLastRun); + uint32_t preMergeCount = run->glyphCount(); + run->grow(count); + + // Callers expect the buffers to point at the newly added slice, ant not at the beginning. + fCurrentRunBuffer.glyphs = run->glyphBuffer() + preMergeCount; + fCurrentRunBuffer.pos = run->posBuffer() + + preMergeCount * SkTextBlob::ScalarsPerGlyph(positioning); + + fStorageUsed += sizeDelta; + + SkASSERT(fStorageUsed <= fStorageSize); + run->validate(fStorage.get() + fStorageUsed); + + return true; +} + +void SkTextBlobBuilder::allocInternal(const SkFont& font, + SkTextBlob::GlyphPositioning positioning, + int count, int textSize, SkPoint offset, + const SkRect* bounds) { + if (count <= 0 || textSize < 0) { + fCurrentRunBuffer = { nullptr, nullptr, nullptr, nullptr }; + return; + } + + if (textSize != 0 || !this->mergeRun(font, positioning, count, offset)) { + this->updateDeferredBounds(); + + SkSafeMath safe; + size_t runSize = SkTextBlob::RunRecord::StorageSize(count, textSize, positioning, &safe); + if (!safe) { + fCurrentRunBuffer = { nullptr, nullptr, nullptr, nullptr }; + return; + } + + this->reserve(runSize); + + SkASSERT(fStorageUsed >= SkAlignPtr(sizeof(SkTextBlob))); + SkASSERT(fStorageUsed + runSize <= fStorageSize); + + SkTextBlob::RunRecord* run = new (fStorage.get() + fStorageUsed) + SkTextBlob::RunRecord(count, textSize, offset, font, positioning); + fCurrentRunBuffer.glyphs = run->glyphBuffer(); + fCurrentRunBuffer.pos = run->posBuffer(); + fCurrentRunBuffer.utf8text = run->textBuffer(); + fCurrentRunBuffer.clusters = run->clusterBuffer(); + + fLastRun = fStorageUsed; + fStorageUsed += runSize; + fRunCount++; + + SkASSERT(fStorageUsed <= fStorageSize); + run->validate(fStorage.get() + fStorageUsed); + } + SkASSERT(textSize > 0 || nullptr == fCurrentRunBuffer.utf8text); + SkASSERT(textSize > 0 || nullptr == fCurrentRunBuffer.clusters); + if (!fDeferredBounds) { + if (bounds) { + fBounds.join(*bounds); + } else { + fDeferredBounds = true; + } + } +} + +// SkFont versions + +const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRun(const SkFont& font, int count, + SkScalar x, SkScalar y, + const SkRect* bounds) { + this->allocInternal(font, SkTextBlob::kDefault_Positioning, count, 0, {x, y}, bounds); + return fCurrentRunBuffer; +} + +const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunPosH(const SkFont& font, int count, + SkScalar y, + const SkRect* bounds) { + this->allocInternal(font, SkTextBlob::kHorizontal_Positioning, count, 0, {0, y}, bounds); + return fCurrentRunBuffer; +} + +const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunPos(const SkFont& font, int count, + const SkRect* bounds) { + this->allocInternal(font, SkTextBlob::kFull_Positioning, count, 0, {0, 0}, bounds); + return fCurrentRunBuffer; +} + +const SkTextBlobBuilder::RunBuffer& +SkTextBlobBuilder::allocRunRSXform(const SkFont& font, int count) { + this->allocInternal(font, SkTextBlob::kRSXform_Positioning, count, 0, {0, 0}, nullptr); + return fCurrentRunBuffer; +} + +const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunText(const SkFont& font, int count, + SkScalar x, SkScalar y, + int textByteCount, + const SkRect* bounds) { + this->allocInternal(font, + SkTextBlob::kDefault_Positioning, + count, + textByteCount, + SkPoint::Make(x, y), + bounds); + return fCurrentRunBuffer; +} + +const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunTextPosH(const SkFont& font, + int count, + SkScalar y, + int textByteCount, + const SkRect* bounds) { + this->allocInternal(font, + SkTextBlob::kHorizontal_Positioning, + count, + textByteCount, + SkPoint::Make(0, y), + bounds); + return fCurrentRunBuffer; +} + +const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunTextPos(const SkFont& font, + int count, + int textByteCount, + const SkRect *bounds) { + this->allocInternal(font, + SkTextBlob::kFull_Positioning, + count, textByteCount, + SkPoint::Make(0, 0), + bounds); + return fCurrentRunBuffer; +} + +const SkTextBlobBuilder::RunBuffer& SkTextBlobBuilder::allocRunTextRSXform(const SkFont& font, + int count, + int textByteCount, + const SkRect *bounds) { + this->allocInternal(font, + SkTextBlob::kRSXform_Positioning, + count, + textByteCount, + {0, 0}, + bounds); + return fCurrentRunBuffer; +} + +sk_sp SkTextBlobBuilder::make() { + if (!fRunCount) { + // We don't instantiate empty blobs. + SkASSERT(!fStorage.get()); + SkASSERT(fStorageUsed == 0); + SkASSERT(fStorageSize == 0); + SkASSERT(fLastRun == 0); + SkASSERT(fBounds.isEmpty()); + return nullptr; + } + + this->updateDeferredBounds(); + + // Tag the last run as such. + auto* lastRun = reinterpret_cast(fStorage.get() + fLastRun); + lastRun->fFlags |= SkTextBlob::RunRecord::kLast_Flag; + + SkTextBlob* blob = new (fStorage.release()) SkTextBlob(fBounds); + SkDEBUGCODE(const_cast(blob)->fStorageSize = fStorageSize;) + + SkDEBUGCODE( + SkSafeMath safe; + size_t validateSize = SkAlignPtr(sizeof(SkTextBlob)); + for (const auto* run = SkTextBlob::RunRecord::First(blob); run; + run = SkTextBlob::RunRecord::Next(run)) { + validateSize += SkTextBlob::RunRecord::StorageSize( + run->fCount, run->textSize(), run->positioning(), &safe); + run->validate(reinterpret_cast(blob) + fStorageUsed); + fRunCount--; + } + SkASSERT(validateSize == fStorageUsed); + SkASSERT(fRunCount == 0); + SkASSERT(safe); + ) + + fStorageUsed = 0; + fStorageSize = 0; + fRunCount = 0; + fLastRun = 0; + fBounds.setEmpty(); + + return sk_sp(blob); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +void SkTextBlobPriv::Flatten(const SkTextBlob& blob, SkWriteBuffer& buffer) { + // seems like we could skip this, and just recompute bounds in unflatten, but + // some cc_unittests fail if we remove this... + buffer.writeRect(blob.bounds()); + + SkTextBlobRunIterator it(&blob); + while (!it.done()) { + SkASSERT(it.glyphCount() > 0); + + buffer.write32(it.glyphCount()); + PositioningAndExtended pe; + pe.intValue = 0; + pe.positioning = it.positioning(); + SkASSERT((int32_t)it.positioning() == pe.intValue); // backwards compat. + + uint32_t textSize = it.textSize(); + pe.extended = textSize > 0; + buffer.write32(pe.intValue); + if (pe.extended) { + buffer.write32(textSize); + } + buffer.writePoint(it.offset()); + + SkFontPriv::Flatten(it.font(), buffer); + + buffer.writeByteArray(it.glyphs(), it.glyphCount() * sizeof(uint16_t)); + buffer.writeByteArray(it.pos(), + it.glyphCount() * sizeof(SkScalar) * + SkTextBlob::ScalarsPerGlyph( + SkTo(it.positioning()))); + if (pe.extended) { + buffer.writeByteArray(it.clusters(), sizeof(uint32_t) * it.glyphCount()); + buffer.writeByteArray(it.text(), it.textSize()); + } + + it.next(); + } + + // Marker for the last run (0 is not a valid glyph count). + buffer.write32(0); +} + +sk_sp SkTextBlobPriv::MakeFromBuffer(SkReadBuffer& reader) { + SkRect bounds; + reader.readRect(&bounds); + + SkTextBlobBuilder blobBuilder; + SkSafeMath safe; + for (;;) { + int glyphCount = reader.read32(); + if (glyphCount == 0) { + // End-of-runs marker. + break; + } + + PositioningAndExtended pe; + pe.intValue = reader.read32(); + const auto pos = SkTo(pe.positioning); + if (glyphCount <= 0 || pos > SkTextBlob::kRSXform_Positioning) { + return nullptr; + } + int textSize = pe.extended ? reader.read32() : 0; + if (textSize < 0) { + return nullptr; + } + + SkPoint offset; + reader.readPoint(&offset); + SkFont font; + SkFontPriv::Unflatten(&font, reader); + + // Compute the expected size of the buffer and ensure we have enough to deserialize + // a run before allocating it. + const size_t glyphSize = safe.mul(glyphCount, sizeof(uint16_t)), + posSize = + safe.mul(glyphCount, safe.mul(sizeof(SkScalar), + SkTextBlob::ScalarsPerGlyph(pos))), + clusterSize = pe.extended ? safe.mul(glyphCount, sizeof(uint32_t)) : 0; + const size_t totalSize = + safe.add(safe.add(glyphSize, posSize), safe.add(clusterSize, textSize)); + + if (!reader.isValid() || !safe || totalSize > reader.available()) { + return nullptr; + } + + const SkTextBlobBuilder::RunBuffer* buf = nullptr; + switch (pos) { + case SkTextBlob::kDefault_Positioning: + buf = &blobBuilder.allocRunText(font, glyphCount, offset.x(), offset.y(), + textSize, &bounds); + break; + case SkTextBlob::kHorizontal_Positioning: + buf = &blobBuilder.allocRunTextPosH(font, glyphCount, offset.y(), + textSize, &bounds); + break; + case SkTextBlob::kFull_Positioning: + buf = &blobBuilder.allocRunTextPos(font, glyphCount, textSize, &bounds); + break; + case SkTextBlob::kRSXform_Positioning: + buf = &blobBuilder.allocRunTextRSXform(font, glyphCount, textSize, &bounds); + break; + } + + if (!buf->glyphs || + !buf->pos || + (pe.extended && (!buf->clusters || !buf->utf8text))) { + return nullptr; + } + + if (!reader.readByteArray(buf->glyphs, glyphSize) || + !reader.readByteArray(buf->pos, posSize)) { + return nullptr; + } + + if (pe.extended) { + if (!reader.readByteArray(buf->clusters, clusterSize) || + !reader.readByteArray(buf->utf8text, textSize)) { + return nullptr; + } + } + } + + return blobBuilder.make(); +} + +sk_sp SkTextBlob::MakeFromText(const void* text, size_t byteLength, const SkFont& font, + SkTextEncoding encoding) { + // Note: we deliberately promote this to fully positioned blobs, since we'd have to pay the + // same cost down stream (i.e. computing bounds), so its cheaper to pay the cost once now. + const int count = font.countText(text, byteLength, encoding); + if (count < 1) { + return nullptr; + } + SkTextBlobBuilder builder; + auto buffer = builder.allocRunPos(font, count); + font.textToGlyphs(text, byteLength, encoding, buffer.glyphs, count); + font.getPos(buffer.glyphs, count, buffer.points(), {0, 0}); + return builder.make(); +} + +sk_sp SkTextBlob::MakeFromPosText(const void* text, size_t byteLength, + const SkPoint pos[], const SkFont& font, + SkTextEncoding encoding) { + const int count = font.countText(text, byteLength, encoding); + if (count < 1) { + return nullptr; + } + SkTextBlobBuilder builder; + auto buffer = builder.allocRunPos(font, count); + font.textToGlyphs(text, byteLength, encoding, buffer.glyphs, count); + memcpy(buffer.points(), pos, count * sizeof(SkPoint)); + return builder.make(); +} + +sk_sp SkTextBlob::MakeFromPosTextH(const void* text, size_t byteLength, + const SkScalar xpos[], SkScalar constY, + const SkFont& font, SkTextEncoding encoding) { + const int count = font.countText(text, byteLength, encoding); + if (count < 1) { + return nullptr; + } + SkTextBlobBuilder builder; + auto buffer = builder.allocRunPosH(font, count, constY); + font.textToGlyphs(text, byteLength, encoding, buffer.glyphs, count); + memcpy(buffer.pos, xpos, count * sizeof(SkScalar)); + return builder.make(); +} + +sk_sp SkTextBlob::MakeFromRSXform(const void* text, size_t byteLength, + const SkRSXform xform[], const SkFont& font, + SkTextEncoding encoding) { + const int count = font.countText(text, byteLength, encoding); + if (count < 1) { + return nullptr; + } + SkTextBlobBuilder builder; + auto buffer = builder.allocRunRSXform(font, count); + font.textToGlyphs(text, byteLength, encoding, buffer.glyphs, count); + memcpy(buffer.xforms(), xform, count * sizeof(SkRSXform)); + return builder.make(); +} + +sk_sp SkTextBlob::serialize(const SkSerialProcs& procs) const { + SkBinaryWriteBuffer buffer; + buffer.setSerialProcs(procs); + SkTextBlobPriv::Flatten(*this, buffer); + + size_t total = buffer.bytesWritten(); + sk_sp data = SkData::MakeUninitialized(total); + buffer.writeToMemory(data->writable_data()); + return data; +} + +sk_sp SkTextBlob::Deserialize(const void* data, size_t length, + const SkDeserialProcs& procs) { + SkReadBuffer buffer(data, length); + buffer.setDeserialProcs(procs); + return SkTextBlobPriv::MakeFromBuffer(buffer); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +size_t SkTextBlob::serialize(const SkSerialProcs& procs, void* memory, size_t memory_size) const { + SkBinaryWriteBuffer buffer(memory, memory_size); + buffer.setSerialProcs(procs); + SkTextBlobPriv::Flatten(*this, buffer); + return buffer.usingInitialStorage() ? buffer.bytesWritten() : 0u; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +namespace { +int get_glyph_run_intercepts(const sktext::GlyphRun& glyphRun, + const SkPaint& paint, + const SkScalar bounds[2], + SkScalar intervals[], + int* intervalCount) { + SkScalar scale = SK_Scalar1; + SkPaint interceptPaint{paint}; + SkFont interceptFont{glyphRun.font()}; + + interceptPaint.setMaskFilter(nullptr); // don't want this affecting our path-cache lookup + + // can't use our canonical size if we need to apply path effects + if (interceptPaint.getPathEffect() == nullptr) { + // If the wrong size is going to be used, don't hint anything. + interceptFont.setHinting(SkFontHinting::kNone); + interceptFont.setSubpixel(true); + scale = interceptFont.getSize() / SkFontPriv::kCanonicalTextSizeForPaths; + interceptFont.setSize(SkIntToScalar(SkFontPriv::kCanonicalTextSizeForPaths)); + // Note: fScale can be zero here (even if it wasn't before the divide). It can also + // be very very small. We call sk_ieee_float_divide below to ensure IEEE divide behavior, + // since downstream we will check for the resulting coordinates being non-finite anyway. + // Thus we don't need to check for zero here. + if (interceptPaint.getStrokeWidth() > 0 + && interceptPaint.getStyle() != SkPaint::kFill_Style) { + interceptPaint.setStrokeWidth( + sk_ieee_float_divide(interceptPaint.getStrokeWidth(), scale)); + } + } + + interceptPaint.setStyle(SkPaint::kFill_Style); + interceptPaint.setPathEffect(nullptr); + + SkStrikeSpec strikeSpec = SkStrikeSpec::MakeWithNoDevice(interceptFont, &interceptPaint); + SkBulkGlyphMetricsAndPaths metricsAndPaths{strikeSpec}; + + const SkPoint* posCursor = glyphRun.positions().begin(); + for (const SkGlyph* glyph : metricsAndPaths.glyphs(glyphRun.glyphsIDs())) { + SkPoint pos = *posCursor++; + + if (glyph->path() != nullptr) { + // The typeface is scaled, so un-scale the bounds to be in the space of the typeface. + // Also ensure the bounds are properly offset by the vertical positioning of the glyph. + SkScalar scaledBounds[2] = { + (bounds[0] - pos.y()) / scale, + (bounds[1] - pos.y()) / scale + }; + metricsAndPaths.findIntercepts( + scaledBounds, scale, pos.x(), glyph, intervals, intervalCount); + } + } + return *intervalCount; +} +} // namespace + +int SkTextBlob::getIntercepts(const SkScalar bounds[2], SkScalar intervals[], + const SkPaint* paint) const { + SkTLazy defaultPaint; + if (paint == nullptr) { + defaultPaint.init(); + paint = defaultPaint.get(); + } + + sktext::GlyphRunBuilder builder; + auto glyphRunList = builder.blobToGlyphRunList(*this, {0, 0}); + + int intervalCount = 0; + for (const sktext::GlyphRun& glyphRun : glyphRunList) { + // Ignore RSXForm runs. + if (glyphRun.scaledRotations().empty()) { + intervalCount = get_glyph_run_intercepts( + glyphRun, *paint, bounds, intervals, &intervalCount); + } + } + + return intervalCount; +} + +std::vector SkFont::getIntercepts(const SkGlyphID glyphs[], int count, + const SkPoint positions[], + SkScalar top, SkScalar bottom, + const SkPaint* paintPtr) const { + if (count <= 0) { + return std::vector(); + } + + const SkPaint paint(paintPtr ? *paintPtr : SkPaint()); + const SkScalar bounds[] = {top, bottom}; + const sktext::GlyphRun run(*this, + {positions, size_t(count)}, {glyphs, size_t(count)}, + {nullptr, 0}, {nullptr, 0}, {nullptr, 0}); + + std::vector result; + result.resize(count * 2); // worst case allocation + int intervalCount = 0; + intervalCount = get_glyph_run_intercepts(run, paint, bounds, result.data(), &intervalCount); + result.resize(intervalCount); + return result; +} + +//////// + +SkTextBlob::Iter::Iter(const SkTextBlob& blob) { + fRunRecord = RunRecord::First(&blob); +} + +bool SkTextBlob::Iter::next(Run* rec) { + if (fRunRecord) { + if (rec) { + rec->fTypeface = fRunRecord->font().getTypeface(); + rec->fGlyphCount = fRunRecord->glyphCount(); + rec->fGlyphIndices = fRunRecord->glyphBuffer(); +#ifdef SK_UNTIL_CRBUG_1187654_IS_FIXED + rec->fClusterIndex_forTest = fRunRecord->clusterBuffer(); + rec->fUtf8Size_forTest = fRunRecord->textSize(); + rec->fUtf8_forTest = fRunRecord->textBuffer(); +#endif + } + if (fRunRecord->isLastRun()) { + fRunRecord = nullptr; + } else { + fRunRecord = RunRecord::Next(fRunRecord); + } + return true; + } + return false; +} + +bool SkTextBlob::Iter::experimentalNext(ExperimentalRun* rec) { + if (fRunRecord) { + if (rec) { + rec->font = fRunRecord->font(); + rec->count = fRunRecord->glyphCount(); + rec->glyphs = fRunRecord->glyphBuffer(); + rec->positions = fRunRecord->pointBuffer(); + } + if (fRunRecord->isLastRun()) { + fRunRecord = nullptr; + } else { + fRunRecord = RunRecord::Next(fRunRecord); + } + return true; + } + return false; +} diff --git a/gfx/skia/skia/src/core/SkTextBlobPriv.h b/gfx/skia/skia/src/core/SkTextBlobPriv.h new file mode 100644 index 0000000000..6a4c1531cf --- /dev/null +++ b/gfx/skia/skia/src/core/SkTextBlobPriv.h @@ -0,0 +1,261 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTextBlobPriv_DEFINED +#define SkTextBlobPriv_DEFINED + +#include "include/core/SkColorFilter.h" +#include "include/core/SkFont.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkShader.h" +#include "include/core/SkTextBlob.h" +#include "include/core/SkTypeface.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkPaintPriv.h" + +class SkReadBuffer; +class SkWriteBuffer; + +class SkTextBlobPriv { +public: + /** + * Serialize to a buffer. + */ + static void Flatten(const SkTextBlob& , SkWriteBuffer&); + + /** + * Recreate an SkTextBlob that was serialized into a buffer. + * + * @param SkReadBuffer Serialized blob data. + * @return A new SkTextBlob representing the serialized data, or NULL if the buffer is + * invalid. + */ + static sk_sp MakeFromBuffer(SkReadBuffer&); + + static bool HasRSXForm(const SkTextBlob& blob); +}; + +// +// Textblob data is laid out into externally-managed storage as follows: +// +// ----------------------------------------------------------------------------- +// | SkTextBlob | RunRecord | Glyphs[] | Pos[] | RunRecord | Glyphs[] | Pos[] | ... +// ----------------------------------------------------------------------------- +// +// Each run record describes a text blob run, and can be used to determine the (implicit) +// location of the following record. +// +// Extended Textblob runs have more data after the Pos[] array: +// +// ------------------------------------------------------------------------- +// ... | RunRecord | Glyphs[] | Pos[] | TextSize | Clusters[] | Text[] | ... +// ------------------------------------------------------------------------- +// +// To determine the length of the extended run data, the TextSize must be read. +// +// Extended Textblob runs may be mixed with non-extended runs. + +SkDEBUGCODE(static const unsigned kRunRecordMagic = 0xb10bcafe;) + +class SkTextBlob::RunRecord { +public: + RunRecord(uint32_t count, uint32_t textSize, const SkPoint& offset, const SkFont& font, GlyphPositioning pos) + : fFont(font) + , fCount(count) + , fOffset(offset) + , fFlags(pos) { + SkASSERT(static_cast(pos) <= Flags::kPositioning_Mask); + + SkDEBUGCODE(fMagic = kRunRecordMagic); + if (textSize > 0) { + fFlags |= kExtended_Flag; + *this->textSizePtr() = textSize; + } + } + + uint32_t glyphCount() const { + return fCount; + } + + const SkPoint& offset() const { + return fOffset; + } + + const SkFont& font() const { + return fFont; + } + + GlyphPositioning positioning() const { + return static_cast(fFlags & kPositioning_Mask); + } + + uint16_t* glyphBuffer() const { + static_assert(SkIsAlignPtr(sizeof(RunRecord)), ""); + // Glyphs are stored immediately following the record. + return reinterpret_cast(const_cast(this) + 1); + } + + // can be aliased with pointBuffer() or xformBuffer() + SkScalar* posBuffer() const { + // Position scalars follow the (aligned) glyph buffer. + return reinterpret_cast(reinterpret_cast(this->glyphBuffer()) + + SkAlign4(fCount * sizeof(uint16_t))); + } + + // alias for posBuffer() + SkPoint* pointBuffer() const { + SkASSERT(this->positioning() == (GlyphPositioning)2); + return reinterpret_cast(this->posBuffer()); + } + + // alias for posBuffer() + SkRSXform* xformBuffer() const { + SkASSERT(this->positioning() == (GlyphPositioning)3); + return reinterpret_cast(this->posBuffer()); + } + + uint32_t textSize() const { return isExtended() ? *this->textSizePtr() : 0; } + + uint32_t* clusterBuffer() const { + // clusters follow the textSize. + return isExtended() ? 1 + this->textSizePtr() : nullptr; + } + + char* textBuffer() const { + return isExtended() + ? reinterpret_cast(this->clusterBuffer() + fCount) + : nullptr; + } + + bool isLastRun() const { return SkToBool(fFlags & kLast_Flag); } + + static size_t StorageSize(uint32_t glyphCount, uint32_t textSize, + SkTextBlob::GlyphPositioning positioning, + SkSafeMath* safe); + + static const RunRecord* First(const SkTextBlob* blob); + + static const RunRecord* Next(const RunRecord* run); + + void validate(const uint8_t* storageTop) const; + +private: + friend class SkTextBlobBuilder; + + enum Flags { + kPositioning_Mask = 0x03, // bits 0-1 reserved for positioning + kLast_Flag = 0x04, // set for the last blob run + kExtended_Flag = 0x08, // set for runs with text/cluster info + }; + + static const RunRecord* NextUnchecked(const RunRecord* run); + + static size_t PosCount(uint32_t glyphCount, + SkTextBlob::GlyphPositioning positioning, + SkSafeMath* safe); + + uint32_t* textSizePtr() const; + + void grow(uint32_t count); + + bool isExtended() const { + return fFlags & kExtended_Flag; + } + + SkFont fFont; + uint32_t fCount; + SkPoint fOffset; + uint32_t fFlags; + + SkDEBUGCODE(unsigned fMagic;) +}; + +/** + * Iterate through all of the text runs of the text blob. For example: + * for (SkTextBlobRunIterator it(blob); !it.done(); it.next()) { + * ..... + * } + */ +class SkTextBlobRunIterator { +public: + SkTextBlobRunIterator(const SkTextBlob* blob); + + enum GlyphPositioning : uint8_t { + kDefault_Positioning = 0, // Default glyph advances -- zero scalars per glyph. + kHorizontal_Positioning = 1, // Horizontal positioning -- one scalar per glyph. + kFull_Positioning = 2, // Point positioning -- two scalars per glyph. + kRSXform_Positioning = 3, // RSXform positioning -- four scalars per glyph. + }; + + bool done() const { + return !fCurrentRun; + } + void next(); + + uint32_t glyphCount() const { + SkASSERT(!this->done()); + return fCurrentRun->glyphCount(); + } + const uint16_t* glyphs() const { + SkASSERT(!this->done()); + return fCurrentRun->glyphBuffer(); + } + const SkScalar* pos() const { + SkASSERT(!this->done()); + return fCurrentRun->posBuffer(); + } + // alias for pos() + const SkPoint* points() const { + return fCurrentRun->pointBuffer(); + } + // alias for pos() + const SkRSXform* xforms() const { + return fCurrentRun->xformBuffer(); + } + const SkPoint& offset() const { + SkASSERT(!this->done()); + return fCurrentRun->offset(); + } + const SkFont& font() const { + SkASSERT(!this->done()); + return fCurrentRun->font(); + } + GlyphPositioning positioning() const; + unsigned scalarsPerGlyph() const; + uint32_t* clusters() const { + SkASSERT(!this->done()); + return fCurrentRun->clusterBuffer(); + } + uint32_t textSize() const { + SkASSERT(!this->done()); + return fCurrentRun->textSize(); + } + char* text() const { + SkASSERT(!this->done()); + return fCurrentRun->textBuffer(); + } + + bool isLCD() const; + +private: + const SkTextBlob::RunRecord* fCurrentRun; + + SkDEBUGCODE(uint8_t* fStorageTop;) +}; + +inline bool SkTextBlobPriv::HasRSXForm(const SkTextBlob& blob) { + for (SkTextBlobRunIterator i{&blob}; !i.done(); i.next()) { + if (i.positioning() == SkTextBlobRunIterator::kRSXform_Positioning) { + return true; + } + } + return false; +} + +#endif // SkTextBlobPriv_DEFINED diff --git a/gfx/skia/skia/src/core/SkTextBlobTrace.cpp b/gfx/skia/skia/src/core/SkTextBlobTrace.cpp new file mode 100644 index 0000000000..0e90c57875 --- /dev/null +++ b/gfx/skia/skia/src/core/SkTextBlobTrace.cpp @@ -0,0 +1,119 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#include "src/core/SkTextBlobTrace.h" + +#include "include/core/SkTextBlob.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkPtrRecorder.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkTextBlobPriv.h" +#include "src/core/SkWriteBuffer.h" + +std::vector SkTextBlobTrace::CreateBlobTrace(SkStream* stream) { + std::vector trace; + + uint32_t typefaceCount; + if (!stream->readU32(&typefaceCount)) { + return trace; + } + + std::vector> typefaceArray; + for (uint32_t i = 0; i < typefaceCount; i++) { + typefaceArray.push_back(SkTypeface::MakeDeserialize(stream)); + } + + uint32_t restOfFile; + if (!stream->readU32(&restOfFile)) { + return trace; + } + sk_sp data = SkData::MakeFromStream(stream, restOfFile); + SkReadBuffer readBuffer{data->data(), data->size()}; + readBuffer.setTypefaceArray(typefaceArray.data(), typefaceArray.size()); + + while (!readBuffer.eof()) { + SkTextBlobTrace::Record record; + record.origUniqueID = readBuffer.readUInt(); + record.paint = readBuffer.readPaint(); + readBuffer.readPoint(&record.offset); + record.blob = SkTextBlobPriv::MakeFromBuffer(readBuffer); + trace.push_back(std::move(record)); + } + return trace; +} + +void SkTextBlobTrace::DumpTrace(const std::vector& trace) { + for (const SkTextBlobTrace::Record& record : trace) { + const SkTextBlob* blob = record.blob.get(); + const SkPaint& p = record.paint; + bool weirdPaint = p.getStyle() != SkPaint::kFill_Style + || p.getMaskFilter() != nullptr + || p.getPathEffect() != nullptr; + + SkDebugf("Blob %d ( %g %g ) %d\n ", + blob->uniqueID(), record.offset.x(), record.offset.y(), weirdPaint); + SkTextBlobRunIterator iter(blob); + int runNumber = 0; + while (!iter.done()) { + SkDebugf("Run %d\n ", runNumber); + SkFont font = iter.font(); + SkDebugf("Font %d %g %g %g %d %d %d\n ", + font.getTypefaceOrDefault()->uniqueID(), + font.getSize(), + font.getScaleX(), + font.getSkewX(), + SkFontPriv::Flags(font), + (int)font.getEdging(), + (int)font.getHinting()); + uint32_t glyphCount = iter.glyphCount(); + const uint16_t* glyphs = iter.glyphs(); + for (uint32_t i = 0; i < glyphCount; i++) { + SkDebugf("%02X ", glyphs[i]); + } + SkDebugf("\n"); + runNumber += 1; + iter.next(); + } + } +} + +SkTextBlobTrace::Capture::Capture() : fTypefaceSet(new SkRefCntSet) { + fWriteBuffer.setTypefaceRecorder(fTypefaceSet); +} + +SkTextBlobTrace::Capture::~Capture() = default; + +void SkTextBlobTrace::Capture::capture( + const sktext::GlyphRunList& glyphRunList, const SkPaint& paint) { + const SkTextBlob* blob = glyphRunList.blob(); + if (blob != nullptr) { + fWriteBuffer.writeUInt(blob->uniqueID()); + fWriteBuffer.writePaint(paint); + fWriteBuffer.writePoint(glyphRunList.origin()); + SkTextBlobPriv::Flatten(*blob, fWriteBuffer); + fBlobCount++; + } +} + +void SkTextBlobTrace::Capture::dump(SkWStream* dst) const { + SkTLazy fileStream; + if (!dst) { + uint32_t id = SkChecksum::Mix(reinterpret_cast(this)); + SkString f = SkStringPrintf("diff-canvas-%08x-%04zu.trace", id, fBlobCount); + dst = fileStream.init(f.c_str()); + if (!fileStream->isValid()) { + SkDebugf("Error opening '%s'.\n", f.c_str()); + return; + } + SkDebugf("Saving trace to '%s'.\n", f.c_str()); + } + SkASSERT(dst); + int count = fTypefaceSet->count(); + dst->write32(count); + SkPtrSet::Iter iter(*fTypefaceSet); + while (void* ptr = iter.next()) { + ((const SkTypeface*)ptr)->serialize(dst, SkTypeface::SerializeBehavior::kDoIncludeData); + } + dst->write32(fWriteBuffer.bytesWritten()); + fWriteBuffer.writeToStream(dst); +} diff --git a/gfx/skia/skia/src/core/SkTextBlobTrace.h b/gfx/skia/skia/src/core/SkTextBlobTrace.h new file mode 100644 index 0000000000..8aa776523e --- /dev/null +++ b/gfx/skia/skia/src/core/SkTextBlobTrace.h @@ -0,0 +1,49 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkTextBlobTrace_DEFINED +#define SkTextBlobTrace_DEFINED + +#include "include/core/SkTypes.h" + +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkStream.h" +#include "include/core/SkTextBlob.h" +#include "src/core/SkWriteBuffer.h" +#include "src/text/GlyphRun.h" + +#include +#include + +namespace SkTextBlobTrace { + +struct Record { + uint32_t origUniqueID; + SkPaint paint; + SkPoint offset; + sk_sp blob; +}; + +std::vector CreateBlobTrace(SkStream* stream); + +void DumpTrace(const std::vector&); + +class Capture { +public: + Capture(); + ~Capture(); + void capture(const sktext::GlyphRunList&, const SkPaint&); + // If `dst` is nullptr, write to a file. + void dump(SkWStream* dst = nullptr) const; + +private: + size_t fBlobCount = 0; + sk_sp fTypefaceSet; + SkBinaryWriteBuffer fWriteBuffer; + + Capture(const Capture&) = delete; + Capture& operator=(const Capture&) = delete; +}; + +} // namespace SkTextBlobTrace +#endif // SkTextBlobTrace_DEFINED diff --git a/gfx/skia/skia/src/core/SkTextFormatParams.h b/gfx/skia/skia/src/core/SkTextFormatParams.h new file mode 100644 index 0000000000..00f9fce65c --- /dev/null +++ b/gfx/skia/skia/src/core/SkTextFormatParams.h @@ -0,0 +1,31 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkTextFormatParams_DEFINES +#define SkTextFormatParams_DEFINES + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" + +// The fraction of text size to embolden fake bold text scales with text size. +// At 9 points or below, the stroke width is increased by text size / 24. +// At 36 points and above, it is increased by text size / 32. In between, +// it is interpolated between those values. +static const SkScalar kStdFakeBoldInterpKeys[] = { + SK_Scalar1*9, + SK_Scalar1*36, +}; +static const SkScalar kStdFakeBoldInterpValues[] = { + SK_Scalar1/24, + SK_Scalar1/32, +}; +static_assert(std::size(kStdFakeBoldInterpKeys) == std::size(kStdFakeBoldInterpValues), + "mismatched_array_size"); +static const int kStdFakeBoldInterpLength = std::size(kStdFakeBoldInterpKeys); + +#endif //SkTextFormatParams_DEFINES diff --git a/gfx/skia/skia/src/core/SkTime.cpp b/gfx/skia/skia/src/core/SkTime.cpp new file mode 100644 index 0000000000..cb2ed3b1c5 --- /dev/null +++ b/gfx/skia/skia/src/core/SkTime.cpp @@ -0,0 +1,89 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTime.h" + +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkLeanWindows.h" + +void SkTime::DateTime::toISO8601(SkString* dst) const { + if (dst) { + int timeZoneMinutes = SkToInt(fTimeZoneMinutes); + char timezoneSign = timeZoneMinutes >= 0 ? '+' : '-'; + int timeZoneHours = SkTAbs(timeZoneMinutes) / 60; + timeZoneMinutes = SkTAbs(timeZoneMinutes) % 60; + dst->printf("%04u-%02u-%02uT%02u:%02u:%02u%c%02d:%02d", + static_cast(fYear), static_cast(fMonth), + static_cast(fDay), static_cast(fHour), + static_cast(fMinute), + static_cast(fSecond), timezoneSign, timeZoneHours, + timeZoneMinutes); + } +} + +#ifdef SK_BUILD_FOR_WIN + +void SkTime::GetDateTime(DateTime* dt) { + if (dt) { + SYSTEMTIME st; + GetSystemTime(&st); + dt->fTimeZoneMinutes = 0; + dt->fYear = st.wYear; + dt->fMonth = SkToU8(st.wMonth); + dt->fDayOfWeek = SkToU8(st.wDayOfWeek); + dt->fDay = SkToU8(st.wDay); + dt->fHour = SkToU8(st.wHour); + dt->fMinute = SkToU8(st.wMinute); + dt->fSecond = SkToU8(st.wSecond); + } +} + +#else // SK_BUILD_FOR_WIN + +#include +void SkTime::GetDateTime(DateTime* dt) { + if (dt) { + time_t m_time; + time(&m_time); + struct tm tstruct; + gmtime_r(&m_time, &tstruct); + dt->fTimeZoneMinutes = 0; + dt->fYear = tstruct.tm_year + 1900; + dt->fMonth = SkToU8(tstruct.tm_mon + 1); + dt->fDayOfWeek = SkToU8(tstruct.tm_wday); + dt->fDay = SkToU8(tstruct.tm_mday); + dt->fHour = SkToU8(tstruct.tm_hour); + dt->fMinute = SkToU8(tstruct.tm_min); + dt->fSecond = SkToU8(tstruct.tm_sec); + } +} +#endif // SK_BUILD_FOR_WIN + +#if !defined(__has_feature) + #define __has_feature(x) 0 +#endif + +#if __has_feature(memory_sanitizer) || defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID) +#include +double SkTime::GetNSecs() { + // See skia:6504 + struct timespec tp; + clock_gettime(CLOCK_MONOTONIC, &tp); + return tp.tv_sec * 1e9 + tp.tv_nsec; +} +#else +#include +#include +double SkTime::GetNSecs() { + auto now = std::chrono::steady_clock::now(); + std::chrono::duration ns = now.time_since_epoch(); + return ns.count(); +} +#endif diff --git a/gfx/skia/skia/src/core/SkTraceEvent.h b/gfx/skia/skia/src/core/SkTraceEvent.h new file mode 100644 index 0000000000..f18e48625f --- /dev/null +++ b/gfx/skia/skia/src/core/SkTraceEvent.h @@ -0,0 +1,419 @@ +// Copyright (c) 2014 Google Inc. +// +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +// This header file defines implementation details of how the trace macros in +// SkTraceEventCommon.h collect and store trace events. Anything not +// implementation-specific should go in SkTraceEventCommon.h instead of here. + +#ifndef SkTraceEvent_DEFINED +#define SkTraceEvent_DEFINED + +#include "include/utils/SkEventTracer.h" +#include "src/core/SkTraceEventCommon.h" +#include + +#if defined(SK_ANDROID_FRAMEWORK_USE_PERFETTO) + #include + #include +#endif + +//////////////////////////////////////////////////////////////////////////////// +// Implementation specific tracing API definitions. + +// Makes it easier to add traces with a simple TRACE_EVENT0("skia", TRACE_FUNC). +#if defined(_MSC_VER) + #define TRACE_FUNC __FUNCSIG__ +#else + #define TRACE_FUNC __PRETTY_FUNCTION__ +#endif + + +#if defined(SK_ANDROID_FRAMEWORK_USE_PERFETTO) + // By default, const char* argument values are assumed to have long-lived scope + // and will not be copied. Use this macro to force a const char* to be copied. + // + // TRACE_STR_COPY should be used with short-lived strings that should be copied immediately. + // TRACE_STR_STATIC should be used with pointers to string literals with process lifetime. + // Neither should be used for string literals known at compile time. + // + // E.g. TRACE_EVENT0("skia", TRACE_STR_COPY(something.c_str())); + #define TRACE_STR_COPY(str) (::perfetto::DynamicString{str}) + + // Allows callers to pass static strings that aren't known at compile time to trace functions. + // + // TRACE_STR_COPY should be used with short-lived strings that should be copied immediately. + // TRACE_STR_STATIC should be used with pointers to string literals with process lifetime. + // Neither should be used for string literals known at compile time. + // + // E.g. TRACE_EVENT0("skia", TRACE_STR_STATIC(this->name())); + // No-op when Perfetto is disabled, or outside of Android framework. + #define TRACE_STR_STATIC(str) (::perfetto::StaticString{str}) +#else // !SK_ANDROID_FRAMEWORK_USE_PERFETTO + // By default, const char* argument values are assumed to have long-lived scope + // and will not be copied. Use this macro to force a const char* to be copied. + // + // TRACE_STR_COPY should be used with short-lived strings that should be copied immediately. + // TRACE_STR_STATIC should be used with pointers to string literals with process lifetime. + // Neither should be used for string literals known at compile time. + // + // E.g. TRACE_EVENT0("skia", TRACE_STR_COPY(something.c_str())); + #define TRACE_STR_COPY(str) (::skia_private::TraceStringWithCopy(str)) + + // Allows callers to pass static strings that aren't known at compile time to trace functions. + // + // TRACE_STR_COPY should be used with short-lived strings that should be copied immediately. + // TRACE_STR_STATIC should be used with pointers to string literals with process lifetime. + // Neither should be used for string literals known at compile time. + // + // E.g. TRACE_EVENT0("skia", TRACE_STR_STATIC(this->name())); + // No-op when Perfetto is disabled, or outside of Android framework. + #define TRACE_STR_STATIC(str) (str) +#endif // SK_ANDROID_FRAMEWORK_USE_PERFETTO + +#define INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE() \ + *INTERNAL_TRACE_EVENT_UID(category_group_enabled) & \ + (SkEventTracer::kEnabledForRecording_CategoryGroupEnabledFlags | \ + SkEventTracer::kEnabledForEventCallback_CategoryGroupEnabledFlags) + +// Get a pointer to the enabled state of the given trace category. Only +// long-lived literal strings should be given as the category group. The +// returned pointer can be held permanently in a local static for example. If +// the unsigned char is non-zero, tracing is enabled. If tracing is enabled, +// TRACE_EVENT_API_ADD_TRACE_EVENT can be called. It's OK if tracing is disabled +// between the load of the tracing state and the call to +// TRACE_EVENT_API_ADD_TRACE_EVENT, because this flag only provides an early out +// for best performance when tracing is disabled. +// const uint8_t* +// TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(const char* category_group) +#define TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED \ + SkEventTracer::GetInstance()->getCategoryGroupEnabled + +// Add a trace event to the platform tracing system. +// SkEventTracer::Handle TRACE_EVENT_API_ADD_TRACE_EVENT( +// char phase, +// const uint8_t* category_group_enabled, +// const char* name, +// uint64_t id, +// int num_args, +// const char** arg_names, +// const uint8_t* arg_types, +// const uint64_t* arg_values, +// unsigned char flags) +#define TRACE_EVENT_API_ADD_TRACE_EVENT \ + SkEventTracer::GetInstance()->addTraceEvent + +// Set the duration field of a COMPLETE trace event. +// void TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION( +// const uint8_t* category_group_enabled, +// const char* name, +// SkEventTracer::Handle id) +#define TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION \ + SkEventTracer::GetInstance()->updateTraceEventDuration + +#ifdef SK_ANDROID_FRAMEWORK_USE_PERFETTO + #define TRACE_EVENT_API_NEW_TRACE_SECTION(...) do {} while (0) +#else + // Start writing to a new trace output section (file, etc.). + // Accepts a label for the new section. + // void TRACE_EVENT_API_NEW_TRACE_SECTION(const char* name) + #define TRACE_EVENT_API_NEW_TRACE_SECTION \ + SkEventTracer::GetInstance()->newTracingSection +#endif + +// Defines visibility for classes in trace_event.h +#define TRACE_EVENT_API_CLASS_EXPORT SK_API + +// We prepend this string to all category names, so that ALL Skia trace events are +// disabled by default when tracing in Chrome. +#define TRACE_CATEGORY_PREFIX "disabled-by-default-" + +//////////////////////////////////////////////////////////////////////////////// + +// Implementation detail: trace event macros create temporary variables +// to keep instrumentation overhead low. These macros give each temporary +// variable a unique name based on the line number to prevent name collisions. +#define INTERNAL_TRACE_EVENT_UID3(a,b) \ + trace_event_unique_##a##b +#define INTERNAL_TRACE_EVENT_UID2(a,b) \ + INTERNAL_TRACE_EVENT_UID3(a,b) +#define INTERNAL_TRACE_EVENT_UID(name_prefix) \ + INTERNAL_TRACE_EVENT_UID2(name_prefix, __LINE__) + +// Implementation detail: internal macro to create static category. +// No barriers are needed, because this code is designed to operate safely +// even when the unsigned char* points to garbage data (which may be the case +// on processors without cache coherency). +#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO_CUSTOM_VARIABLES( \ + category_group, atomic, category_group_enabled) \ + category_group_enabled = \ + reinterpret_cast(atomic.load(std::memory_order_relaxed)); \ + if (!category_group_enabled) { \ + category_group_enabled = TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group); \ + atomic.store(reinterpret_cast(category_group_enabled), \ + std::memory_order_relaxed); \ + } + +#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group) \ + static std::atomic INTERNAL_TRACE_EVENT_UID(atomic){0}; \ + const uint8_t* INTERNAL_TRACE_EVENT_UID(category_group_enabled); \ + INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO_CUSTOM_VARIABLES( \ + TRACE_CATEGORY_PREFIX category_group, \ + INTERNAL_TRACE_EVENT_UID(atomic), \ + INTERNAL_TRACE_EVENT_UID(category_group_enabled)); + +// Implementation detail: internal macro to create static category and add +// event if the category is enabled. +#define INTERNAL_TRACE_EVENT_ADD(phase, category_group, name, flags, ...) \ + do { \ + INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \ + if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \ + skia_private::AddTraceEvent( \ + phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \ + skia_private::kNoEventId, flags, ##__VA_ARGS__); \ + } \ + } while (0) + +// Implementation detail: internal macro to create static category and add +// event if the category is enabled. +#define INTERNAL_TRACE_EVENT_ADD_WITH_ID(phase, category_group, name, id, \ + flags, ...) \ + do { \ + INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \ + if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \ + unsigned char trace_event_flags = flags | TRACE_EVENT_FLAG_HAS_ID; \ + skia_private::TraceID trace_event_trace_id( \ + id, &trace_event_flags); \ + skia_private::AddTraceEvent( \ + phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), \ + name, trace_event_trace_id.data(), trace_event_flags, \ + ##__VA_ARGS__); \ + } \ + } while (0) + +// Implementation detail: internal macro to create static category and add begin +// event if the category is enabled. Also adds the end event when the scope +// ends. +#define INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name, ...) \ + INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \ + skia_private::ScopedTracer INTERNAL_TRACE_EVENT_UID(tracer); \ + do { \ + if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \ + SkEventTracer::Handle h = skia_private::AddTraceEvent( \ + TRACE_EVENT_PHASE_COMPLETE, \ + INTERNAL_TRACE_EVENT_UID(category_group_enabled), \ + name, skia_private::kNoEventId, \ + TRACE_EVENT_FLAG_NONE, ##__VA_ARGS__); \ + INTERNAL_TRACE_EVENT_UID(tracer).Initialize( \ + INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, h); \ + } \ + } while (0) + +namespace skia_private { + +// Specify these values when the corresponding argument of AddTraceEvent is not +// used. +const int kZeroNumArgs = 0; +const uint64_t kNoEventId = 0; + +// TraceID encapsulates an ID that can either be an integer or pointer. Pointers +// are by default mangled with the Process ID so that they are unlikely to +// collide when the same pointer is used on different processes. +class TraceID { +public: + TraceID(const void* id, unsigned char* flags) + : data_(static_cast(reinterpret_cast(id))) { + *flags |= TRACE_EVENT_FLAG_MANGLE_ID; + } + TraceID(uint64_t id, unsigned char* flags) + : data_(id) { (void)flags; } + TraceID(unsigned int id, unsigned char* flags) + : data_(id) { (void)flags; } + TraceID(unsigned short id, unsigned char* flags) + : data_(id) { (void)flags; } + TraceID(unsigned char id, unsigned char* flags) + : data_(id) { (void)flags; } + TraceID(long long id, unsigned char* flags) + : data_(static_cast(id)) { (void)flags; } + TraceID(long id, unsigned char* flags) + : data_(static_cast(id)) { (void)flags; } + TraceID(int id, unsigned char* flags) + : data_(static_cast(id)) { (void)flags; } + TraceID(short id, unsigned char* flags) + : data_(static_cast(id)) { (void)flags; } + TraceID(signed char id, unsigned char* flags) + : data_(static_cast(id)) { (void)flags; } + + uint64_t data() const { return data_; } + +private: + uint64_t data_; +}; + +// Simple union to store various types as uint64_t. +union TraceValueUnion { + bool as_bool; + uint64_t as_uint; + long long as_int; + double as_double; + const void* as_pointer; + const char* as_string; +}; + +// Simple container for const char* that should be copied instead of retained. +class TraceStringWithCopy { + public: + explicit TraceStringWithCopy(const char* str) : str_(str) {} + operator const char* () const { return str_; } + private: + const char* str_; +}; + +// Define SetTraceValue for each allowed type. It stores the type and +// value in the return arguments. This allows this API to avoid declaring any +// structures so that it is portable to third_party libraries. +#define INTERNAL_DECLARE_SET_TRACE_VALUE(actual_type, \ + union_member, \ + value_type_id) \ + static inline void SetTraceValue( \ + actual_type arg, \ + unsigned char* type, \ + uint64_t* value) { \ + TraceValueUnion type_value; \ + type_value.union_member = arg; \ + *type = value_type_id; \ + *value = type_value.as_uint; \ + } +// Simpler form for int types that can be safely casted. +#define INTERNAL_DECLARE_SET_TRACE_VALUE_INT(actual_type, \ + value_type_id) \ + static inline void SetTraceValue( \ + actual_type arg, \ + unsigned char* type, \ + uint64_t* value) { \ + *type = value_type_id; \ + *value = static_cast(arg); \ + } + +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(uint64_t, TRACE_VALUE_TYPE_UINT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned int, TRACE_VALUE_TYPE_UINT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned short, TRACE_VALUE_TYPE_UINT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned char, TRACE_VALUE_TYPE_UINT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(long long, TRACE_VALUE_TYPE_INT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(long, TRACE_VALUE_TYPE_INT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(int, TRACE_VALUE_TYPE_INT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(short, TRACE_VALUE_TYPE_INT) +INTERNAL_DECLARE_SET_TRACE_VALUE_INT(signed char, TRACE_VALUE_TYPE_INT) +INTERNAL_DECLARE_SET_TRACE_VALUE(bool, as_bool, TRACE_VALUE_TYPE_BOOL) +INTERNAL_DECLARE_SET_TRACE_VALUE(double, as_double, TRACE_VALUE_TYPE_DOUBLE) +INTERNAL_DECLARE_SET_TRACE_VALUE(const void*, as_pointer, TRACE_VALUE_TYPE_POINTER) +INTERNAL_DECLARE_SET_TRACE_VALUE(const char*, as_string, TRACE_VALUE_TYPE_STRING) +INTERNAL_DECLARE_SET_TRACE_VALUE(const TraceStringWithCopy&, as_string, + TRACE_VALUE_TYPE_COPY_STRING) + +#undef INTERNAL_DECLARE_SET_TRACE_VALUE +#undef INTERNAL_DECLARE_SET_TRACE_VALUE_INT + +// These AddTraceEvent and AddTraceEvent template +// functions are defined here instead of in the macro, because the arg_values +// could be temporary objects, such as std::string. In order to store +// pointers to the internal c_str and pass through to the tracing API, +// the arg_values must live throughout these procedures. + +static inline SkEventTracer::Handle +AddTraceEvent( + char phase, + const uint8_t* category_group_enabled, + const char* name, + uint64_t id, + unsigned char flags) { + return TRACE_EVENT_API_ADD_TRACE_EVENT( + phase, category_group_enabled, name, id, + kZeroNumArgs, nullptr, nullptr, nullptr, flags); +} + +template +static inline SkEventTracer::Handle +AddTraceEvent( + char phase, + const uint8_t* category_group_enabled, + const char* name, + uint64_t id, + unsigned char flags, + const char* arg1_name, + const ARG1_TYPE& arg1_val) { + const int num_args = 1; + uint8_t arg_types[1]; + uint64_t arg_values[1]; + SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]); + return TRACE_EVENT_API_ADD_TRACE_EVENT( + phase, category_group_enabled, name, id, + num_args, &arg1_name, arg_types, arg_values, flags); +} + +template +static inline SkEventTracer::Handle +AddTraceEvent( + char phase, + const uint8_t* category_group_enabled, + const char* name, + uint64_t id, + unsigned char flags, + const char* arg1_name, + const ARG1_TYPE& arg1_val, + const char* arg2_name, + const ARG2_TYPE& arg2_val) { + const int num_args = 2; + const char* arg_names[2] = { arg1_name, arg2_name }; + unsigned char arg_types[2]; + uint64_t arg_values[2]; + SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]); + SetTraceValue(arg2_val, &arg_types[1], &arg_values[1]); + return TRACE_EVENT_API_ADD_TRACE_EVENT( + phase, category_group_enabled, name, id, + num_args, arg_names, arg_types, arg_values, flags); +} + +// Used by TRACE_EVENTx macros. Do not use directly. +class TRACE_EVENT_API_CLASS_EXPORT ScopedTracer { + public: + // Note: members of data_ intentionally left uninitialized. See Initialize. + ScopedTracer() : p_data_(nullptr) {} + + ~ScopedTracer() { + if (p_data_ && *data_.category_group_enabled) + TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION( + data_.category_group_enabled, data_.name, data_.event_handle); + } + + void Initialize(const uint8_t* category_group_enabled, + const char* name, + SkEventTracer::Handle event_handle) { + data_.category_group_enabled = category_group_enabled; + data_.name = name; + data_.event_handle = event_handle; + p_data_ = &data_; + } + + private: + ScopedTracer(const ScopedTracer&) = delete; + ScopedTracer& operator=(const ScopedTracer&) = delete; + + // This Data struct workaround is to avoid initializing all the members + // in Data during construction of this object, since this object is always + // constructed, even when tracing is disabled. If the members of Data were + // members of this class instead, compiler warnings occur about potential + // uninitialized accesses. + struct Data { + const uint8_t* category_group_enabled; + const char* name; + SkEventTracer::Handle event_handle; + }; + Data* p_data_; + Data data_; +}; + +} // namespace skia_private + +#endif diff --git a/gfx/skia/skia/src/core/SkTraceEventCommon.h b/gfx/skia/skia/src/core/SkTraceEventCommon.h new file mode 100644 index 0000000000..01d2b1876a --- /dev/null +++ b/gfx/skia/skia/src/core/SkTraceEventCommon.h @@ -0,0 +1,557 @@ +// Copyright 2015 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +#ifndef SkTraceEventCommon_DEFINED +#define SkTraceEventCommon_DEFINED + +#include "include/core/SkTypes.h" +#include "include/utils/SkTraceEventPhase.h" + +// Trace events are for tracking application performance and resource usage. +// Macros are provided to track: +// Duration of scoped regions +// Instantaneous events +// Counters +// +// The first two arguments to all TRACE macros are the category and name. Both are strings, and +// must have application lifetime (statics or literals). The same applies to arg_names, and string +// argument values. However, you can force a copy of a string argument value with TRACE_STR_COPY: +// TRACE_EVENT1("category", "name", "arg1", "literal string is only referenced"); +// TRACE_EVENT1("category", "name", "arg1", TRACE_STR_COPY("string will be copied")); +// +// +// Categories are used to group events, and +// can be enabled or disabled by the tracing framework. The trace system will automatically add the +// process id, thread id, and microsecond timestamp to all events. +// +// +// The TRACE_EVENT[0-2] macros trace the duration of entire scopes: +// void doSomethingCostly() { +// TRACE_EVENT0("MY_SUBSYSTEM", "doSomethingCostly"); +// ... +// } +// +// Additional parameters can be associated with an event: +// void doSomethingCostly2(int howMuch) { +// TRACE_EVENT1("MY_SUBSYSTEM", "doSomethingCostly", "howMuch", howMuch); +// ... +// } +// +// +// Trace event also supports counters, which is a way to track a quantity as it varies over time. +// Counters are created with the following macro: +// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter", g_myCounterValue); +// +// Counters are process-specific. The macro itself can be issued from any thread, however. +// +// Sometimes, you want to track two counters at once. You can do this with two counter macros: +// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter0", g_myCounterValue[0]); +// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter1", g_myCounterValue[1]); +// Or you can do it with a combined macro: +// TRACE_COUNTER2("MY_SUBSYSTEM", "myCounter", +// "bytesPinned", g_myCounterValue[0], +// "bytesAllocated", g_myCounterValue[1]); +// The tracing UI will show these counters in a single graph, as a summed area chart. + +#if defined(TRACE_EVENT0) + #error "Another copy of this file has already been included." +#endif + +// --- Temporary Perfetto migration shim preamble --- +// Tracing in the Android framework, and tracing with Perfetto, are both in a partially migrated +// state (but fully functional). +// +// See go/skia-perfetto +// +// For Android framework: +// --- +// 1. If SK_ANDROID_FRAMEWORK_USE_PERFETTO is not defined, then all tracing macros map to no-ops. +// This is only relevant to host-mode builds, where ATrace isn't supported anyway, and tracing with +// Perfetto seems unnecessary. Note that SkAndroidFrameworkTraceUtil is still defined (assuming +// SK_BUILD_FOR_ANDROID_FRAMEWORK is defined) to support HWUI referencing it in host-mode builds. +// +// 2. If SK_ANDROID_FRAMEWORK_USE_PERFETTO *is* defined, then the tracing backend can be switched +// between ATrace and Perfetto at runtime. This is currently *only* supported in Android framework. +// SkAndroidFrameworkTraceUtil::setEnableTracing(bool) will still control broad tracing overall, but +// SkAndroidFrameworkTraceUtil::setUsePerfettoTrackEvents(bool) will now determine whether that +// tracing is done with ATrace (default/false) or Perfetto (true). +// +// Note: if setUsePerfettoTrackEvents(true) is called, then Perfetto will remain initialized until +// the process ends. This means some minimal state overhead will remain even after subseqently +// switching the process back to ATrace, but individual trace events will be correctly routed to +// whichever system is active in the moment. However, trace events which have begun but have not yet +// ended when a switch occurs will likely be corrupted. Thus, it's best to minimize the frequency of +// switching backend tracing systems at runtime. +// +// For Perfetto outside of Android framework (e.g. tools): +// --- +// SK_USE_PERFETTO (mutually exclusive with SK_ANDROID_FRAMEWORK_USE_PERFETTO) can be used to unlock +// SkPerfettoTrace, which can be used for in-process tracing via the standard Skia tracing flow of +// SkEventTracer::SetInstance(...). This is enabled in tools with the `--trace perfetto` argument. +// See https://skia.org/docs/dev/tools/tracing/#tracing-with-perfetto for more on SK_USE_PERFETTO. + +#ifdef SK_ANDROID_FRAMEWORK_USE_PERFETTO + +// PERFETTO_TRACK_EVENT_NAMESPACE must be defined before including Perfetto. This allows Skia to +// maintain separate "track event" category storage, etc. from codebases linked into the same +// executable, and avoid symbol duplication errors. +// +// NOTE: A side-effect of this is we must use skia::TrackEvent instead of perfetto::TrackEvent. +#define PERFETTO_TRACK_EVENT_NAMESPACE skia +#include + +#include +#include +#include + +// WARNING: this list must be kept up to date with every category we use for tracing! +// +// When adding a new category it's likely best to add both "new_category" and "new_category.always", +// though not strictly required. "new_category.always" is used internally when "new_category" is +// given to TRACE_EVENT0_ALWAYS macros, which are used for core events that should always show up in +// traces for the Android framework. Adding both to begin with will likely reduce churn if/when +// "new_category" is used across both normal tracing macros and _ALWAYS variants in the future, but +// it's not a strict requirement. +// +// See stages section of go/skia-perfetto for timeline of when this should improve. +// +// TODO(b/262718654): make this compilation failure happen sooner than the Skia -> Android roll. +// +// Currently kept entirely separate from SkPerfettoTrace for simplicity, which uses dynamic +// categories and doesn't need these static category definitions. +PERFETTO_DEFINE_CATEGORIES( + perfetto::Category("GM"), + perfetto::Category("skia"), + perfetto::Category("skia.android"), + perfetto::Category("skia.gpu"), + perfetto::Category("skia.gpu.cache"), + perfetto::Category("skia.objects"), + perfetto::Category("skia.shaders"), + perfetto::Category("skottie"), + perfetto::Category("test"), + perfetto::Category("test_cpu"), + perfetto::Category("test_ganesh"), + perfetto::Category("test_graphite"), + // ".always" variants are currently required for any category used in TRACE_EVENT0_ALWAYS. + perfetto::Category("GM.always").SetTags("skia.always"), + perfetto::Category("skia.always").SetTags("skia.always"), + perfetto::Category("skia.android.always").SetTags("skia.always"), + perfetto::Category("skia.gpu.always").SetTags("skia.always"), + perfetto::Category("skia.gpu.cache.always").SetTags("skia.always"), + perfetto::Category("skia.objects.always").SetTags("skia.always"), + perfetto::Category("skia.shaders.always").SetTags("skia.always"), + perfetto::Category("skottie.always").SetTags("skia.always"), + perfetto::Category("test.always").SetTags("skia.always"), + perfetto::Category("test_cpu.always").SetTags("skia.always"), + perfetto::Category("test_ganesh.always").SetTags("skia.always"), + perfetto::Category("test_graphite.always").SetTags("skia.always"), +); + +#endif // SK_ANDROID_FRAMEWORK_USE_PERFETTO + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + +#define SK_ANDROID_FRAMEWORK_ATRACE_BUFFER_SIZE 256 + +class SkAndroidFrameworkTraceUtil { +public: + SkAndroidFrameworkTraceUtil() = delete; + + // Controls whether broad tracing is enabled. Warning: not thread-safe! + // + // Some key trace events may still be recorded when this is disabled, if a relevant tracing + // session is active. + // + // ATrace is used by default, but can be replaced with Perfetto by calling + // setUsePerfettoTrackEvents(true) + static void setEnableTracing(bool enableAndroidTracing) { + gEnableAndroidTracing = enableAndroidTracing; + } + + // Controls whether tracing uses Perfetto instead of ATrace. Warning: not thread-safe! + // + // Returns true if Skia was built with Perfetto, false otherwise. + static bool setUsePerfettoTrackEvents(bool usePerfettoTrackEvents) { +#ifdef SK_ANDROID_FRAMEWORK_USE_PERFETTO + // Ensure Perfetto is initialized if it wasn't already the preferred tracing backend. + if (!gUsePerfettoTrackEvents && usePerfettoTrackEvents) { + initPerfetto(); + } + gUsePerfettoTrackEvents = usePerfettoTrackEvents; + return true; +#else // !SK_ANDROID_FRAMEWORK_USE_PERFETTO + // Note: please reach out to skia-android@google.com if you encounter this unexpectedly. + SkDebugf("Tracing Skia with Perfetto is not supported in this environment (host build?)"); + return false; +#endif // SK_ANDROID_FRAMEWORK_USE_PERFETTO + } + + static bool getEnableTracing() { + return gEnableAndroidTracing; + } + + static bool getUsePerfettoTrackEvents() { + return gUsePerfettoTrackEvents; + } + +private: + static bool gEnableAndroidTracing; + static bool gUsePerfettoTrackEvents; + +#ifdef SK_ANDROID_FRAMEWORK_USE_PERFETTO + // Initializes tracing systems, and establishes a connection to the 'traced' daemon. + // + // Can be called multiple times. + static void initPerfetto() { + ::perfetto::TracingInitArgs perfettoArgs; + perfettoArgs.backends |= perfetto::kSystemBackend; + ::perfetto::Tracing::Initialize(perfettoArgs); + ::skia::TrackEvent::Register(); + } +#endif // SK_ANDROID_FRAMEWORK_USE_PERFETTO +}; +#endif // SK_BUILD_FOR_ANDROID_FRAMEWORK + +#ifdef SK_DEBUG +static void skprintf_like_noop(const char format[], ...) SK_PRINTF_LIKE(1, 2); +static inline void skprintf_like_noop(const char format[], ...) {} +static inline void sk_noop(...) {} +#define TRACE_EMPTY(...) do { sk_noop(__VA_ARGS__); } while (0) +#define TRACE_EMPTY_FMT(fmt, ...) do { skprintf_like_noop(fmt, ##__VA_ARGS__); } while (0) +#else +#define TRACE_EMPTY(...) do {} while (0) +#define TRACE_EMPTY_FMT(fmt, ...) do {} while (0) +#endif + +#if defined(SK_DISABLE_TRACING) || \ + (defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) && !defined(SK_ANDROID_FRAMEWORK_USE_PERFETTO)) + + #define ATRACE_ANDROID_FRAMEWORK(fmt, ...) TRACE_EMPTY_FMT(fmt, ##__VA_ARGS__) + #define ATRACE_ANDROID_FRAMEWORK_ALWAYS(fmt, ...) TRACE_EMPTY_FMT(fmt, ##__VA_ARGS__) + #define TRACE_EVENT0(cg, n) TRACE_EMPTY(cg, n) + #define TRACE_EVENT0_ALWAYS(cg, n) TRACE_EMPTY(cg, n) + #define TRACE_EVENT1(cg, n, a1n, a1v) TRACE_EMPTY(cg, n, a1n, a1v) + #define TRACE_EVENT2(cg, n, a1n, a1v, a2n, a2v) TRACE_EMPTY(cg, n, a1n, a1v, a2n, a2v) + #define TRACE_EVENT_INSTANT0(cg, n, scope) TRACE_EMPTY(cg, n, scope) + #define TRACE_EVENT_INSTANT1(cg, n, scope, a1n, a1v) TRACE_EMPTY(cg, n, scope, a1n, a1v) + #define TRACE_EVENT_INSTANT2(cg, n, scope, a1n, a1v, a2n, a2v) \ + TRACE_EMPTY(cg, n, scope, a1n, a1v, a2n, a2v) + #define TRACE_COUNTER1(cg, n, value) TRACE_EMPTY(cg, n, value) + #define TRACE_COUNTER2(cg, n, v1n, v1v, v2n, v2v) TRACE_EMPTY(cg, n, v1n, v1v, v2n, v2v) + +#elif defined(SK_ANDROID_FRAMEWORK_USE_PERFETTO) + +namespace skia_private { + // ATrace can't accept ::perfetto::DynamicString or ::perfetto::StaticString, so any trace event + // names that were wrapped in TRACE_STR_COPY or TRACE_STR_STATIC need to be unboxed back to + // char* before being passed to ATrace. + inline const char* UnboxPerfettoString(const ::perfetto::DynamicString& str) { + return str.value; + } + inline const char* UnboxPerfettoString(const ::perfetto::StaticString& str) { + return str.value; + } + inline const char* UnboxPerfettoString(const char* str) { + return str; + } + + constexpr bool StrEndsWithAndLongerThan(const char* str, const char* suffix) { + auto strView = std::basic_string_view(str); + auto suffixView = std::basic_string_view(suffix); + // string_view::ends_with isn't available until C++20 + return strView.size() > suffixView.size() && + strView.compare(strView.size() - suffixView.size(), + std::string_view::npos, suffixView) == 0; + } +} + +// Generate a unique variable name with a given prefix. +// The indirection in this multi-level macro lets __LINE__ expand at the right time/place to get +// prefix123 instead of prefix__LINE__. +#define SK_PERFETTO_INTERNAL_CONCAT2(a, b) a##b +#define SK_PERFETTO_INTERNAL_CONCAT(a, b) SK_PERFETTO_INTERNAL_CONCAT2(a, b) +#define SK_PERFETTO_UID(prefix) SK_PERFETTO_INTERNAL_CONCAT(prefix, __LINE__) + +// Assuming there is an active tracing session, this call will create a trace event if tracing is +// enabled (with SkAndroidFrameworkTraceUtil::setEnableTracing(true)) or if force_always_trace is +// true. The event goes through ATrace by default, but can be routed to Perfetto instead by calling +// SkAndroidFrameworkTraceUtil::setUsePerfettoTrackEvents(true). +// +// If force_always_trace = true, then the caller *must* append the ".always" suffix to the provided +// category. This allows Perfetto tracing sessions to optionally filter to just the "skia.always" +// category tag. This requirement is enforced at compile time. +#define TRACE_EVENT_ATRACE_OR_PERFETTO_FORCEABLE(force_always_trace, category, name, ...) \ + struct SK_PERFETTO_UID(ScopedEvent) { \ + struct EventFinalizer { \ + /* The ... parameter slot is an implementation detail. It allows the */ \ + /* anonymous struct to use aggregate initialization to invoke the */ \ + /* lambda (which emits the BEGIN event and returns an integer) */ \ + /* with the proper reference capture for any */ \ + /* TrackEventArgumentFunction in |__VA_ARGS__|. This is required so */ \ + /* that the scoped event is exactly ONE line and can't escape the */ \ + /* scope if used in a single line if statement. */ \ + EventFinalizer(...) {} \ + ~EventFinalizer() { \ + if (force_always_trace || \ + CC_UNLIKELY(SkAndroidFrameworkTraceUtil::getEnableTracing())) { \ + if (SkAndroidFrameworkTraceUtil::getUsePerfettoTrackEvents()) { \ + TRACE_EVENT_END(category); \ + } else { \ + ATRACE_END(); \ + } \ + } \ + } \ + \ + EventFinalizer(const EventFinalizer&) = delete; \ + EventFinalizer& operator=(const EventFinalizer&) = delete; \ + \ + EventFinalizer(EventFinalizer&&) = default; \ + EventFinalizer& operator=(EventFinalizer&&) = delete; \ + } finalizer; \ + } SK_PERFETTO_UID(scoped_event) { \ + [&]() { \ + static_assert(!force_always_trace || \ + ::skia_private::StrEndsWithAndLongerThan(category, ".always"), \ + "[force_always_trace == true] requires [category] to end in '.always'"); \ + if (force_always_trace || \ + CC_UNLIKELY(SkAndroidFrameworkTraceUtil::getEnableTracing())) { \ + if (SkAndroidFrameworkTraceUtil::getUsePerfettoTrackEvents()) { \ + TRACE_EVENT_BEGIN(category, name, ##__VA_ARGS__); \ + } else { \ + ATRACE_BEGIN(::skia_private::UnboxPerfettoString(name)); \ + } \ + } \ + return 0; \ + }() \ + } + +// Records an event with the current tracing backend, if overall Skia tracing is also enabled. +#define TRACE_EVENT_ATRACE_OR_PERFETTO(category, name, ...) \ + TRACE_EVENT_ATRACE_OR_PERFETTO_FORCEABLE( \ + /* force_always_trace = */ false, category, name, ##__VA_ARGS__) + +#define ATRACE_ANDROID_FRAMEWORK(fmt, ...) \ + char SK_PERFETTO_UID(skTraceStrBuf)[SK_ANDROID_FRAMEWORK_ATRACE_BUFFER_SIZE]; \ + if (SkAndroidFrameworkTraceUtil::getEnableTracing()) { \ + snprintf(SK_PERFETTO_UID(skTraceStrBuf), SK_ANDROID_FRAMEWORK_ATRACE_BUFFER_SIZE, \ + fmt, ##__VA_ARGS__); \ + } \ + TRACE_EVENT0("skia.android", TRACE_STR_COPY(SK_PERFETTO_UID(skTraceStrBuf))) + +#define ATRACE_ANDROID_FRAMEWORK_ALWAYS(fmt, ...) \ + char SK_PERFETTO_UID(skTraceStrBuf)[SK_ANDROID_FRAMEWORK_ATRACE_BUFFER_SIZE]; \ + snprintf(SK_PERFETTO_UID(skTraceStrBuf), SK_ANDROID_FRAMEWORK_ATRACE_BUFFER_SIZE, \ + fmt, ##__VA_ARGS__); \ + TRACE_EVENT0_ALWAYS("skia.android", TRACE_STR_COPY(SK_PERFETTO_UID(skTraceStrBuf))) + +// Records a pair of begin and end events called "name" for the current scope, with 0, 1 or 2 +// associated arguments. Note that ATrace does not support trace arguments, so they are only +// recorded when Perfetto is set as the current tracing backend. +#define TRACE_EVENT0(category_group, name) \ + TRACE_EVENT_ATRACE_OR_PERFETTO(category_group, name) +// Note: ".always" suffix appended to category_group in TRACE_EVENT0_ALWAYS. +#define TRACE_EVENT0_ALWAYS(category_group, name) TRACE_EVENT_ATRACE_OR_PERFETTO_FORCEABLE( \ + /* force_always_trace = */ true, category_group ".always", name) +#define TRACE_EVENT1(category_group, name, arg1_name, arg1_val) \ + TRACE_EVENT_ATRACE_OR_PERFETTO(category_group, name, arg1_name, arg1_val) +#define TRACE_EVENT2(category_group, name, arg1_name, arg1_val, arg2_name, arg2_val) \ + TRACE_EVENT_ATRACE_OR_PERFETTO(category_group, name, arg1_name, arg1_val, arg2_name, arg2_val) + +// Records a single event called "name" immediately, with 0, 1 or 2 associated arguments. +// Note that ATrace does not support trace arguments, so they are only recorded when Perfetto is set +// as the current tracing backend. +#define TRACE_EVENT_INSTANT0(category_group, name, scope) \ + do { TRACE_EVENT_ATRACE_OR_PERFETTO(category_group, name); } while(0) + +#define TRACE_EVENT_INSTANT1(category_group, name, scope, arg1_name, arg1_val) \ + do { TRACE_EVENT_ATRACE_OR_PERFETTO(category_group, name, arg1_name, arg1_val); } while(0) + +#define TRACE_EVENT_INSTANT2(category_group, name, scope, arg1_name, arg1_val, \ + arg2_name, arg2_val) \ + do { TRACE_EVENT_ATRACE_OR_PERFETTO(category_group, name, arg1_name, arg1_val, \ + arg2_name, arg2_val); } while(0) + +// Records the value of a counter called "name" immediately. Value +// must be representable as a 32 bit integer. +#define TRACE_COUNTER1(category_group, name, value) \ + if (CC_UNLIKELY(SkAndroidFrameworkTraceUtil::getEnableTracing())) { \ + if (SkAndroidFrameworkTraceUtil::getUsePerfettoTrackEvents()) { \ + TRACE_COUNTER(category_group, name, value); \ + } else { \ + ATRACE_INT(name, value); \ + } \ + } + +// Records the values of a multi-parted counter called "name" immediately. +// In Chrome, this macro produces a stacked bar chart. Perfetto doesn't support +// that (related: b/242349575), so this just produces two separate counters. +#define TRACE_COUNTER2(category_group, name, value1_name, value1_val, value2_name, value2_val) \ + if (CC_UNLIKELY(SkAndroidFrameworkTraceUtil::getEnableTracing())) { \ + if (SkAndroidFrameworkTraceUtil::getUsePerfettoTrackEvents()) { \ + TRACE_COUNTER(category_group, name "-" value1_name, value1_val); \ + TRACE_COUNTER(category_group, name "-" value2_name, value2_val); \ + } else { \ + ATRACE_INT(name "-" value1_name, value1_val); \ + ATRACE_INT(name "-" value2_name, value2_val); \ + } \ + } + +// ATrace has no object tracking, and would require a legacy shim for Perfetto (which likely no-ops +// here). Further, these don't appear to currently be used outside of tests. +#define TRACE_EVENT_OBJECT_CREATED_WITH_ID(category_group, name, id) \ + TRACE_EMPTY(category_group, name, id) +#define TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(category_group, name, id, snapshot) \ + TRACE_EMPTY(category_group, name, id, snapshot) +#define TRACE_EVENT_OBJECT_DELETED_WITH_ID(category_group, name, id) \ + TRACE_EMPTY(category_group, name, id) + +// Macro to efficiently determine if a given category group is enabled. Only works with Perfetto. +// This is only used for some shader text logging that isn't supported in ATrace anyway. +#define TRACE_EVENT_CATEGORY_GROUP_ENABLED(category_group, ret) \ + if (CC_UNLIKELY(SkAndroidFrameworkTraceUtil::getEnableTracing() && \ + SkAndroidFrameworkTraceUtil::getUsePerfettoTrackEvents)) { \ + *ret = TRACE_EVENT_CATEGORY_ENABLED(category_group); \ + } else { \ + *ret = false; \ + } + +#else // Route through SkEventTracer (!SK_DISABLE_TRACING && !SK_ANDROID_FRAMEWORK_USE_PERFETTO) + +#define ATRACE_ANDROID_FRAMEWORK(fmt, ...) TRACE_EMPTY_FMT(fmt, ##__VA_ARGS__) +#define ATRACE_ANDROID_FRAMEWORK_ALWAYS(fmt, ...) TRACE_EMPTY_FMT(fmt, ##__VA_ARGS__) + +// Records a pair of begin and end events called "name" for the current scope, with 0, 1 or 2 +// associated arguments. If the category is not enabled, then this does nothing. +#define TRACE_EVENT0(category_group, name) \ + INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name) + +#define TRACE_EVENT0_ALWAYS(category_group, name) \ + INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name) + +#define TRACE_EVENT1(category_group, name, arg1_name, arg1_val) \ + INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name, arg1_name, arg1_val) + +#define TRACE_EVENT2(category_group, name, arg1_name, arg1_val, arg2_name, arg2_val) \ + INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name, arg1_name, arg1_val, arg2_name, arg2_val) + +// Records a single event called "name" immediately, with 0, 1 or 2 associated arguments. If the +// category is not enabled, then this does nothing. +#define TRACE_EVENT_INSTANT0(category_group, name, scope) \ + INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, category_group, name, \ + TRACE_EVENT_FLAG_NONE | scope) + +#define TRACE_EVENT_INSTANT1(category_group, name, scope, arg1_name, arg1_val) \ + INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, category_group, name, \ + TRACE_EVENT_FLAG_NONE | scope, arg1_name, arg1_val) + +#define TRACE_EVENT_INSTANT2(category_group, name, scope, arg1_name, arg1_val, \ + arg2_name, arg2_val) \ + INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, category_group, name, \ + TRACE_EVENT_FLAG_NONE | scope, arg1_name, arg1_val, \ + arg2_name, arg2_val) + +// Records the value of a counter called "name" immediately. Value +// must be representable as a 32 bit integer. +#define TRACE_COUNTER1(category_group, name, value) \ + INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, category_group, name, \ + TRACE_EVENT_FLAG_NONE, "value", \ + static_cast(value)) + +// Records the values of a multi-parted counter called "name" immediately. +// The UI will treat value1 and value2 as parts of a whole, displaying their +// values as a stacked-bar chart. +#define TRACE_COUNTER2(category_group, name, value1_name, value1_val, \ + value2_name, value2_val) \ + INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, category_group, name, \ + TRACE_EVENT_FLAG_NONE, value1_name, \ + static_cast(value1_val), value2_name, \ + static_cast(value2_val)) + +#define TRACE_EVENT_ASYNC_BEGIN0(category, name, id) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID( \ + TRACE_EVENT_PHASE_ASYNC_BEGIN, category, name, id, TRACE_EVENT_FLAG_NONE) +#define TRACE_EVENT_ASYNC_BEGIN1(category, name, id, arg1_name, arg1_val) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \ + category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val) +#define TRACE_EVENT_ASYNC_BEGIN2(category, name, id, arg1_name, arg1_val, arg2_name, arg2_val) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \ + category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, arg2_name, arg2_val) + +#define TRACE_EVENT_ASYNC_END0(category, name, id) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \ + category, name, id, TRACE_EVENT_FLAG_NONE) +#define TRACE_EVENT_ASYNC_END1(category, name, id, arg1_name, arg1_val) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \ + category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val) +#define TRACE_EVENT_ASYNC_END2(category, name, id, arg1_name, arg1_val, arg2_name, arg2_val) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \ + category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, arg2_name, arg2_val) + +// Macros to track the life time and value of arbitrary client objects. +#define TRACE_EVENT_OBJECT_CREATED_WITH_ID(category_group, name, id) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID( \ + TRACE_EVENT_PHASE_CREATE_OBJECT, category_group, name, id, \ + TRACE_EVENT_FLAG_NONE) + +#define TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(category_group, name, id, \ + snapshot) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID( \ + TRACE_EVENT_PHASE_SNAPSHOT_OBJECT, category_group, name, \ + id, TRACE_EVENT_FLAG_NONE, "snapshot", snapshot) + +#define TRACE_EVENT_OBJECT_DELETED_WITH_ID(category_group, name, id) \ + INTERNAL_TRACE_EVENT_ADD_WITH_ID( \ + TRACE_EVENT_PHASE_DELETE_OBJECT, category_group, name, id, \ + TRACE_EVENT_FLAG_NONE) + +// Macro to efficiently determine if a given category group is enabled. +#define TRACE_EVENT_CATEGORY_GROUP_ENABLED(category_group, ret) \ + do { \ + INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \ + if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \ + *ret = true; \ + } else { \ + *ret = false; \ + } \ + } while (0) + +#endif + +// Flags for changing the behavior of TRACE_EVENT_API_ADD_TRACE_EVENT. +#define TRACE_EVENT_FLAG_NONE (static_cast(0)) +#define TRACE_EVENT_FLAG_COPY (static_cast(1 << 0)) +#define TRACE_EVENT_FLAG_HAS_ID (static_cast(1 << 1)) +#define TRACE_EVENT_FLAG_MANGLE_ID (static_cast(1 << 2)) +#define TRACE_EVENT_FLAG_SCOPE_OFFSET (static_cast(1 << 3)) +#define TRACE_EVENT_FLAG_SCOPE_EXTRA (static_cast(1 << 4)) +#define TRACE_EVENT_FLAG_EXPLICIT_TIMESTAMP (static_cast(1 << 5)) +#define TRACE_EVENT_FLAG_ASYNC_TTS (static_cast(1 << 6)) +#define TRACE_EVENT_FLAG_BIND_TO_ENCLOSING (static_cast(1 << 7)) +#define TRACE_EVENT_FLAG_FLOW_IN (static_cast(1 << 8)) +#define TRACE_EVENT_FLAG_FLOW_OUT (static_cast(1 << 9)) +#define TRACE_EVENT_FLAG_HAS_CONTEXT_ID (static_cast(1 << 10)) + +#define TRACE_EVENT_FLAG_SCOPE_MASK \ + (static_cast(TRACE_EVENT_FLAG_SCOPE_OFFSET | \ + TRACE_EVENT_FLAG_SCOPE_EXTRA)) + +// Type values for identifying types in the TraceValue union. +#define TRACE_VALUE_TYPE_BOOL (static_cast(1)) +#define TRACE_VALUE_TYPE_UINT (static_cast(2)) +#define TRACE_VALUE_TYPE_INT (static_cast(3)) +#define TRACE_VALUE_TYPE_DOUBLE (static_cast(4)) +#define TRACE_VALUE_TYPE_POINTER (static_cast(5)) +#define TRACE_VALUE_TYPE_STRING (static_cast(6)) +#define TRACE_VALUE_TYPE_COPY_STRING (static_cast(7)) +#define TRACE_VALUE_TYPE_CONVERTABLE (static_cast(8)) + +// Enum reflecting the scope of an INSTANT event. Must fit within TRACE_EVENT_FLAG_SCOPE_MASK. +#define TRACE_EVENT_SCOPE_GLOBAL (static_cast(0 << 3)) +#define TRACE_EVENT_SCOPE_PROCESS (static_cast(1 << 3)) +#define TRACE_EVENT_SCOPE_THREAD (static_cast(2 << 3)) + +#define TRACE_EVENT_SCOPE_NAME_GLOBAL ('g') +#define TRACE_EVENT_SCOPE_NAME_PROCESS ('p') +#define TRACE_EVENT_SCOPE_NAME_THREAD ('t') + +#endif // SkTraceEventCommon_DEFINED diff --git a/gfx/skia/skia/src/core/SkTypeface.cpp b/gfx/skia/skia/src/core/SkTypeface.cpp new file mode 100644 index 0000000000..14e802e87a --- /dev/null +++ b/gfx/skia/skia/src/core/SkTypeface.cpp @@ -0,0 +1,578 @@ +/* + * Copyright 2011 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMetrics.h" +#include "include/core/SkFontMgr.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkOnce.h" +#include "include/utils/SkCustomTypeface.h" +#include "src/base/SkEndian.h" +#include "src/base/SkUTF.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkFontPriv.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkSurfacePriv.h" +#include "src/core/SkTypefaceCache.h" +#include "src/sfnt/SkOTTable_OS_2.h" + +#ifdef SK_TYPEFACE_FACTORY_FREETYPE +#include "src/ports/SkFontHost_FreeType_common.h" +#endif + +#ifdef SK_TYPEFACE_FACTORY_CORETEXT +#include "src/ports/SkTypeface_mac_ct.h" +#endif + +#ifdef SK_TYPEFACE_FACTORY_DIRECTWRITE +#include "src/ports/SkTypeface_win_dw.h" +#endif + +using namespace skia_private; + +SkTypeface::SkTypeface(const SkFontStyle& style, bool isFixedPitch) + : fUniqueID(SkTypefaceCache::NewTypefaceID()), fStyle(style), fIsFixedPitch(isFixedPitch) { } + +SkTypeface::~SkTypeface() { } + +/////////////////////////////////////////////////////////////////////////////// + +namespace { + +class SkEmptyTypeface : public SkTypeface { +public: + static sk_sp Make() { return sk_sp(new SkEmptyTypeface); } + + static constexpr SkTypeface::FactoryId FactoryId = SkSetFourByteTag('e','m','t','y'); + static sk_sp MakeFromStream(std::unique_ptr stream, + const SkFontArguments&) { + if (stream->getLength() == 0) { + return SkEmptyTypeface::Make(); + } + return nullptr; + } +protected: + SkEmptyTypeface() : SkTypeface(SkFontStyle(), true) { } + + std::unique_ptr onOpenStream(int* ttcIndex) const override { return nullptr; } + sk_sp onMakeClone(const SkFontArguments& args) const override { + return sk_ref_sp(this); + } + std::unique_ptr onCreateScalerContext( + const SkScalerContextEffects& effects, const SkDescriptor* desc) const override + { + return SkScalerContext::MakeEmpty( + sk_ref_sp(const_cast(this)), effects, desc); + } + void onFilterRec(SkScalerContextRec*) const override { } + std::unique_ptr onGetAdvancedMetrics() const override { + return nullptr; + } + void onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const override { + desc->setFactoryId(FactoryId); + *serialize = false; + } + void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override { + sk_bzero(glyphs, count * sizeof(glyphs[0])); + } + int onCountGlyphs() const override { return 0; } + void getPostScriptGlyphNames(SkString*) const override {} + void getGlyphToUnicodeMap(SkUnichar*) const override {} + int onGetUPEM() const override { return 0; } + class EmptyLocalizedStrings : public SkTypeface::LocalizedStrings { + public: + bool next(SkTypeface::LocalizedString*) override { return false; } + }; + void onGetFamilyName(SkString* familyName) const override { + familyName->reset(); + } + bool onGetPostScriptName(SkString*) const override { + return false; + } + SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override { + return new EmptyLocalizedStrings; + } + bool onGlyphMaskNeedsCurrentColor() const override { + return false; + } + int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const override + { + return 0; + } + int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const override + { + return 0; + } + int onGetTableTags(SkFontTableTag tags[]) const override { return 0; } + size_t onGetTableData(SkFontTableTag, size_t, size_t, void*) const override { + return 0; + } +}; + +} // namespace + +SkFontStyle SkTypeface::FromOldStyle(Style oldStyle) { + return SkFontStyle((oldStyle & SkTypeface::kBold) ? SkFontStyle::kBold_Weight + : SkFontStyle::kNormal_Weight, + SkFontStyle::kNormal_Width, + (oldStyle & SkTypeface::kItalic) ? SkFontStyle::kItalic_Slant + : SkFontStyle::kUpright_Slant); +} + +SkTypeface* SkTypeface::GetDefaultTypeface(Style style) { + static SkOnce once[4]; + static sk_sp defaults[4]; + + SkASSERT((int)style < 4); + once[style]([style] { + sk_sp fm(SkFontMgr::RefDefault()); + auto t = fm->legacyMakeTypeface(nullptr, FromOldStyle(style)); + defaults[style] = t ? t : SkEmptyTypeface::Make(); + }); + return defaults[style].get(); +} + +sk_sp SkTypeface::MakeDefault() { + return sk_ref_sp(GetDefaultTypeface()); +} + +uint32_t SkTypeface::UniqueID(const SkTypeface* face) { + if (nullptr == face) { + face = GetDefaultTypeface(); + } + return face->uniqueID(); +} + +bool SkTypeface::Equal(const SkTypeface* facea, const SkTypeface* faceb) { + return facea == faceb || SkTypeface::UniqueID(facea) == SkTypeface::UniqueID(faceb); +} + +/////////////////////////////////////////////////////////////////////////////// + +namespace { + + struct DecoderProc { + SkFourByteTag id; + sk_sp (*makeFromStream)(std::unique_ptr, const SkFontArguments&); + }; + + std::vector* decoders() { + static auto* decoders = new std::vector { + { SkEmptyTypeface::FactoryId, SkEmptyTypeface::MakeFromStream }, + { SkCustomTypefaceBuilder::FactoryId, SkCustomTypefaceBuilder::MakeFromStream }, +#ifdef SK_TYPEFACE_FACTORY_CORETEXT + { SkTypeface_Mac::FactoryId, SkTypeface_Mac::MakeFromStream }, +#endif +#ifdef SK_TYPEFACE_FACTORY_DIRECTWRITE + { DWriteFontTypeface::FactoryId, DWriteFontTypeface::MakeFromStream }, +#endif +#ifdef SK_TYPEFACE_FACTORY_FREETYPE + { SkTypeface_FreeType::FactoryId, SkTypeface_FreeType::MakeFromStream }, +#endif + }; + return decoders; + } + +} // namespace + +sk_sp SkTypeface::MakeFromName(const char name[], + SkFontStyle fontStyle) { + if (nullptr == name && (fontStyle.slant() == SkFontStyle::kItalic_Slant || + fontStyle.slant() == SkFontStyle::kUpright_Slant) && + (fontStyle.weight() == SkFontStyle::kBold_Weight || + fontStyle.weight() == SkFontStyle::kNormal_Weight)) { + return sk_ref_sp(GetDefaultTypeface(static_cast( + (fontStyle.slant() == SkFontStyle::kItalic_Slant ? SkTypeface::kItalic : + SkTypeface::kNormal) | + (fontStyle.weight() == SkFontStyle::kBold_Weight ? SkTypeface::kBold : + SkTypeface::kNormal)))); + } + return SkFontMgr::RefDefault()->legacyMakeTypeface(name, fontStyle); +} + +sk_sp SkTypeface::MakeFromStream(std::unique_ptr stream, int index) { + if (!stream) { + return nullptr; + } + // TODO: Enable this while updating tests (FontHostStream), expectations, and nonativeFonts. +#if 0 + SkFontArguments args; + args.setCollectionIndex(index); + for (const DecoderProc& proc : *decoders()) { + sk_sp typeface = proc.makeFromStream(stream->duplicate(), args); + if (typeface) { + return typeface; + } + } +#endif + return SkFontMgr::RefDefault()->makeFromStream(std::move(stream), index); +} + +sk_sp SkTypeface::MakeFromData(sk_sp data, int index) { + if (!data) { + return nullptr; + } + return SkFontMgr::RefDefault()->makeFromData(std::move(data), index); +} + +sk_sp SkTypeface::MakeFromFile(const char path[], int index) { + return SkFontMgr::RefDefault()->makeFromFile(path, index); +} + +sk_sp SkTypeface::makeClone(const SkFontArguments& args) const { + return this->onMakeClone(args); +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkTypeface::Register( + FactoryId id, + sk_sp (*make)(std::unique_ptr, const SkFontArguments&)) { + decoders()->push_back(DecoderProc{id, make}); +} + +void SkTypeface::serialize(SkWStream* wstream, SerializeBehavior behavior) const { + bool isLocalData = false; + SkFontDescriptor desc; + this->onGetFontDescriptor(&desc, &isLocalData); + if (desc.getFactoryId() == 0) { + SkDEBUGF("Factory was not set for %s.\n", desc.getFamilyName()); + } + + bool shouldSerializeData = false; + switch (behavior) { + case SerializeBehavior::kDoIncludeData: shouldSerializeData = true; break; + case SerializeBehavior::kDontIncludeData: shouldSerializeData = false; break; + case SerializeBehavior::kIncludeDataIfLocal: shouldSerializeData = isLocalData; break; + } + + if (shouldSerializeData) { + int index; + desc.setStream(this->openStream(&index)); + if (desc.hasStream()) { + desc.setCollectionIndex(index); + } + + int numAxes = this->getVariationDesignPosition(nullptr, 0); + if (0 < numAxes) { + numAxes = this->getVariationDesignPosition(desc.setVariationCoordinates(numAxes), numAxes); + if (numAxes <= 0) { + desc.setVariationCoordinates(0); + } + } + } + desc.serialize(wstream); +} + +sk_sp SkTypeface::serialize(SerializeBehavior behavior) const { + SkDynamicMemoryWStream stream; + this->serialize(&stream, behavior); + return stream.detachAsData(); +} + +sk_sp SkTypeface::MakeDeserialize(SkStream* stream) { + SkFontDescriptor desc; + if (!SkFontDescriptor::Deserialize(stream, &desc)) { + return nullptr; + } + + if (desc.hasStream()) { + for (const DecoderProc& proc : *decoders()) { + if (proc.id == desc.getFactoryId()) { + return proc.makeFromStream(desc.detachStream(), desc.getFontArguments()); + } + } + + SkDEBUGCODE(FactoryId id = desc.getFactoryId();) + SkDEBUGF("Could not find factory %c%c%c%c for %s.\n", + (id >> 24) & 0xFF, (id >> 16) & 0xFF, (id >> 8) & 0xFF, (id >> 0) & 0xFF, + desc.getFamilyName()); + + sk_sp defaultFm = SkFontMgr::RefDefault(); + sk_sp typeface = defaultFm->makeFromStream(desc.detachStream(), + desc.getFontArguments()); + if (typeface) { + return typeface; + } + } + + return SkTypeface::MakeFromName(desc.getFamilyName(), desc.getStyle()); +} + +/////////////////////////////////////////////////////////////////////////////// + +bool SkTypeface::glyphMaskNeedsCurrentColor() const { + return this->onGlyphMaskNeedsCurrentColor(); +} + +int SkTypeface::getVariationDesignPosition( + SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) const +{ + return this->onGetVariationDesignPosition(coordinates, coordinateCount); +} + +int SkTypeface::getVariationDesignParameters( + SkFontParameters::Variation::Axis parameters[], int parameterCount) const +{ + return this->onGetVariationDesignParameters(parameters, parameterCount); +} + +int SkTypeface::countTables() const { + return this->onGetTableTags(nullptr); +} + +int SkTypeface::getTableTags(SkFontTableTag tags[]) const { + return this->onGetTableTags(tags); +} + +size_t SkTypeface::getTableSize(SkFontTableTag tag) const { + return this->onGetTableData(tag, 0, ~0U, nullptr); +} + +size_t SkTypeface::getTableData(SkFontTableTag tag, size_t offset, size_t length, + void* data) const { + return this->onGetTableData(tag, offset, length, data); +} + +sk_sp SkTypeface::copyTableData(SkFontTableTag tag) const { + return this->onCopyTableData(tag); +} + +sk_sp SkTypeface::onCopyTableData(SkFontTableTag tag) const { + size_t size = this->getTableSize(tag); + if (size) { + sk_sp data = SkData::MakeUninitialized(size); + (void)this->getTableData(tag, 0, size, data->writable_data()); + return data; + } + return nullptr; +} + +std::unique_ptr SkTypeface::openStream(int* ttcIndex) const { + int ttcIndexStorage; + if (nullptr == ttcIndex) { + // So our subclasses don't need to check for null param + ttcIndex = &ttcIndexStorage; + } + return this->onOpenStream(ttcIndex); +} + +std::unique_ptr SkTypeface::openExistingStream(int* ttcIndex) const { + int ttcIndexStorage; + if (nullptr == ttcIndex) { + // So our subclasses don't need to check for null param + ttcIndex = &ttcIndexStorage; + } + return this->onOpenExistingStream(ttcIndex); +} + +std::unique_ptr SkTypeface::createScalerContext( + const SkScalerContextEffects& effects, const SkDescriptor* desc) const { + std::unique_ptr scalerContext = this->onCreateScalerContext(effects, desc); + SkASSERT(scalerContext); + return scalerContext; +} + +void SkTypeface::unicharsToGlyphs(const SkUnichar uni[], int count, SkGlyphID glyphs[]) const { + if (count > 0 && glyphs && uni) { + this->onCharsToGlyphs(uni, count, glyphs); + } +} + +SkGlyphID SkTypeface::unicharToGlyph(SkUnichar uni) const { + SkGlyphID glyphs[1] = { 0 }; + this->onCharsToGlyphs(&uni, 1, glyphs); + return glyphs[0]; +} + +namespace { +class SkConvertToUTF32 { +public: + SkConvertToUTF32() {} + + const SkUnichar* convert(const void* text, size_t byteLength, SkTextEncoding encoding) { + const SkUnichar* uni; + switch (encoding) { + case SkTextEncoding::kUTF8: { + uni = fStorage.reset(byteLength); + const char* ptr = (const char*)text; + const char* end = ptr + byteLength; + for (int i = 0; ptr < end; ++i) { + fStorage[i] = SkUTF::NextUTF8(&ptr, end); + } + } break; + case SkTextEncoding::kUTF16: { + uni = fStorage.reset(byteLength); + const uint16_t* ptr = (const uint16_t*)text; + const uint16_t* end = ptr + (byteLength >> 1); + for (int i = 0; ptr < end; ++i) { + fStorage[i] = SkUTF::NextUTF16(&ptr, end); + } + } break; + case SkTextEncoding::kUTF32: + uni = (const SkUnichar*)text; + break; + default: + SK_ABORT("unexpected enum"); + } + return uni; + } + +private: + AutoSTMalloc<256, SkUnichar> fStorage; +}; +} + +int SkTypeface::textToGlyphs(const void* text, size_t byteLength, SkTextEncoding encoding, + SkGlyphID glyphs[], int maxGlyphCount) const { + if (0 == byteLength) { + return 0; + } + + SkASSERT(text); + + int count = SkFontPriv::CountTextElements(text, byteLength, encoding); + if (!glyphs || count > maxGlyphCount) { + return count; + } + + if (encoding == SkTextEncoding::kGlyphID) { + memcpy(glyphs, text, count << 1); + return count; + } + + SkConvertToUTF32 storage; + const SkUnichar* uni = storage.convert(text, byteLength, encoding); + + this->unicharsToGlyphs(uni, count, glyphs); + return count; +} + +int SkTypeface::countGlyphs() const { + return this->onCountGlyphs(); +} + +int SkTypeface::getUnitsPerEm() const { + // should we try to cache this in the base-class? + return this->onGetUPEM(); +} + +bool SkTypeface::getKerningPairAdjustments(const uint16_t glyphs[], int count, + int32_t adjustments[]) const { + SkASSERT(count >= 0); + // check for the only legal way to pass a nullptr.. everything is 0 + // in which case they just want to know if this face can possibly support + // kerning (true) or never (false). + if (nullptr == glyphs || nullptr == adjustments) { + SkASSERT(nullptr == glyphs); + SkASSERT(0 == count); + SkASSERT(nullptr == adjustments); + } + return this->onGetKerningPairAdjustments(glyphs, count, adjustments); +} + +SkTypeface::LocalizedStrings* SkTypeface::createFamilyNameIterator() const { + return this->onCreateFamilyNameIterator(); +} + +void SkTypeface::getFamilyName(SkString* name) const { + SkASSERT(name); + this->onGetFamilyName(name); +} + +bool SkTypeface::getPostScriptName(SkString* name) const { + return this->onGetPostScriptName(name); +} + +void SkTypeface::getGlyphToUnicodeMap(SkUnichar* dst) const { + sk_bzero(dst, sizeof(SkUnichar) * this->countGlyphs()); +} + +std::unique_ptr SkTypeface::getAdvancedMetrics() const { + std::unique_ptr result = this->onGetAdvancedMetrics(); + if (result && result->fPostScriptName.isEmpty()) { + result->fPostScriptName = result->fFontName; + } + if (result && result->fType == SkAdvancedTypefaceMetrics::kTrueType_Font) { + SkOTTableOS2::Version::V2::Type::Field fsType; + constexpr SkFontTableTag os2Tag = SkTEndian_SwapBE32(SkOTTableOS2::TAG); + constexpr size_t fsTypeOffset = offsetof(SkOTTableOS2::Version::V2, fsType); + if (this->getTableData(os2Tag, fsTypeOffset, sizeof(fsType), &fsType) == sizeof(fsType)) { + if (fsType.Bitmap || (fsType.Restricted && !(fsType.PreviewPrint || fsType.Editable))) { + result->fFlags |= SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag; + } + if (fsType.NoSubsetting) { + result->fFlags |= SkAdvancedTypefaceMetrics::kNotSubsettable_FontFlag; + } + } + } + return result; +} + +bool SkTypeface::onGetKerningPairAdjustments(const uint16_t glyphs[], int count, + int32_t adjustments[]) const { + return false; +} + +std::unique_ptr SkTypeface::onOpenExistingStream(int* ttcIndex) const { + return this->onOpenStream(ttcIndex); +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "include/core/SkPaint.h" +#include "src/core/SkDescriptor.h" + +SkRect SkTypeface::getBounds() const { + fBoundsOnce([this] { + if (!this->onComputeBounds(&fBounds)) { + fBounds.setEmpty(); + } + }); + return fBounds; +} + +bool SkTypeface::onComputeBounds(SkRect* bounds) const { + // we use a big size to ensure lots of significant bits from the scalercontext. + // then we scale back down to return our final answer (at 1-pt) + const SkScalar textSize = 2048; + const SkScalar invTextSize = 1 / textSize; + + SkFont font; + font.setTypeface(sk_ref_sp(const_cast(this))); + font.setSize(textSize); + font.setLinearMetrics(true); + + SkScalerContextRec rec; + SkScalerContextEffects effects; + + SkScalerContext::MakeRecAndEffectsFromFont(font, &rec, &effects); + + SkAutoDescriptor ad; + SkScalerContextEffects noeffects; + SkScalerContext::AutoDescriptorGivenRecAndEffects(rec, noeffects, &ad); + + std::unique_ptr ctx = this->createScalerContext(noeffects, ad.getDesc()); + + SkFontMetrics fm; + ctx->getFontMetrics(&fm); + if (!fm.hasBounds()) { + return false; + } + bounds->setLTRB(fm.fXMin * invTextSize, fm.fTop * invTextSize, + fm.fXMax * invTextSize, fm.fBottom * invTextSize); + return true; +} + +std::unique_ptr SkTypeface::onGetAdvancedMetrics() const { + SkDEBUGFAIL("Typefaces that need to work with PDF backend must override this."); + return nullptr; +} diff --git a/gfx/skia/skia/src/core/SkTypefaceCache.cpp b/gfx/skia/skia/src/core/SkTypefaceCache.cpp new file mode 100644 index 0000000000..d94f2bae5c --- /dev/null +++ b/gfx/skia/skia/src/core/SkTypefaceCache.cpp @@ -0,0 +1,115 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkMutex.h" +#include "src/core/SkTypefaceCache.h" +#include + +#define TYPEFACE_CACHE_LIMIT 1024 + +SkTypefaceCache::SkTypefaceCache() {} + +void SkTypefaceCache::add(sk_sp face) { +#ifndef SK_DISABLE_TYPEFACE_CACHE + if (fTypefaces.size() >= TYPEFACE_CACHE_LIMIT) { + this->purge(TYPEFACE_CACHE_LIMIT >> 2); + } + + fTypefaces.emplace_back(std::move(face)); +#endif +} + +sk_sp SkTypefaceCache::findByProcAndRef(FindProc proc, void* ctx) const { +#ifndef SK_DISABLE_TYPEFACE_CACHE + for (const sk_sp& typeface : fTypefaces) { + if (proc(typeface.get(), ctx)) { + return typeface; + } + } +#endif + return nullptr; +} + +void SkTypefaceCache::purge(int numToPurge) { + int count = fTypefaces.size(); + int i = 0; + while (i < count) { + if (fTypefaces[i]->unique()) { + fTypefaces.removeShuffle(i); + --count; + if (--numToPurge == 0) { + return; + } + } else { + ++i; + } + } +} + +void SkTypefaceCache::purgeAll() { + this->purge(fTypefaces.size()); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkTypefaceCache& SkTypefaceCache::Get() { + static SkTypefaceCache gCache; + return gCache; +} + +SkTypefaceID SkTypefaceCache::NewTypefaceID() { + static std::atomic nextID{1}; + return nextID.fetch_add(1, std::memory_order_relaxed); +} + +static SkMutex& typeface_cache_mutex() { + static SkMutex& mutex = *(new SkMutex); + return mutex; +} + +void SkTypefaceCache::Add(sk_sp face) { +#ifndef SK_DISABLE_TYPEFACE_CACHE + SkAutoMutexExclusive ama(typeface_cache_mutex()); + Get().add(std::move(face)); +#endif +} + +sk_sp SkTypefaceCache::FindByProcAndRef(FindProc proc, void* ctx) { +#ifndef SK_DISABLE_TYPEFACE_CACHE + SkAutoMutexExclusive ama(typeface_cache_mutex()); + return Get().findByProcAndRef(proc, ctx); +#else + return nullptr; +#endif +} + +void SkTypefaceCache::PurgeAll() { +#ifndef SK_DISABLE_TYPEFACE_CACHE + SkAutoMutexExclusive ama(typeface_cache_mutex()); + Get().purgeAll(); +#endif +} + +/////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_DEBUG +static bool DumpProc(SkTypeface* face, void* ctx) { + SkString n; + face->getFamilyName(&n); + SkFontStyle s = face->fontStyle(); + SkTypefaceID id = face->uniqueID(); + SkDebugf("SkTypefaceCache: face %p typefaceID %d weight %d width %d style %d name %s\n", + face, id, s.weight(), s.width(), s.slant(), n.c_str()); + return false; +} +#endif + +void SkTypefaceCache::Dump() { +#ifdef SK_DEBUG + (void)Get().findByProcAndRef(DumpProc, nullptr); +#endif +} diff --git a/gfx/skia/skia/src/core/SkTypefaceCache.h b/gfx/skia/skia/src/core/SkTypefaceCache.h new file mode 100644 index 0000000000..e11f760d45 --- /dev/null +++ b/gfx/skia/skia/src/core/SkTypefaceCache.h @@ -0,0 +1,74 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + + +#ifndef SkTypefaceCache_DEFINED +#define SkTypefaceCache_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkTArray.h" + +class SkTypefaceCache { +public: + SkTypefaceCache(); + + /** + * Callback for FindByProc. Returns true if the given typeface is a match + * for the given context. The passed typeface is owned by the cache and is + * not additionally ref()ed. The typeface may be in the disposed state. + */ + typedef bool(*FindProc)(SkTypeface*, void* context); + + /** + * Add a typeface to the cache. Later, if we need to purge the cache, + * typefaces uniquely owned by the cache will be unref()ed. + */ + void add(sk_sp); + + /** + * Iterate through the cache, calling proc(typeface, ctx) for each typeface. + * If proc returns true, then return that typeface. + * If it never returns true, return nullptr. + */ + sk_sp findByProcAndRef(FindProc proc, void* ctx) const; + + /** + * This will unref all of the typefaces in the cache for which the cache + * is the only owner. Normally this is handled automatically as needed. + * This function is exposed for clients that explicitly want to purge the + * cache (e.g. to look for leaks). + */ + void purgeAll(); + + /** + * Helper: returns a unique typefaceID to pass to the constructor of + * your subclass of SkTypeface + */ + static SkTypefaceID NewTypefaceID(); + + // These are static wrappers around a global instance of a cache. + + static void Add(sk_sp); + static sk_sp FindByProcAndRef(FindProc proc, void* ctx); + static void PurgeAll(); + + /** + * Debugging only: dumps the status of the typefaces in the cache + */ + static void Dump(); + +private: + static SkTypefaceCache& Get(); + + void purge(int count); + + skia_private::TArray> fTypefaces; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkTypeface_remote.cpp b/gfx/skia/skia/src/core/SkTypeface_remote.cpp new file mode 100644 index 0000000000..f43f7157fc --- /dev/null +++ b/gfx/skia/skia/src/core/SkTypeface_remote.cpp @@ -0,0 +1,158 @@ +/* + * Copyright 2018 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPaint.h" +#include "include/private/chromium/SkChromeRemoteGlyphCache.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkTraceEvent.h" +#include "src/core/SkTypeface_remote.h" +#include "src/core/SkWriteBuffer.h" + +#include + +SkScalerContextProxy::SkScalerContextProxy(sk_sp tf, + const SkScalerContextEffects& effects, + const SkDescriptor* desc, + sk_sp manager) + : SkScalerContext{std::move(tf), effects, desc} + , fDiscardableManager{std::move(manager)} {} + +bool SkScalerContextProxy::generateAdvance(SkGlyph* glyph) { + return false; +} + +void SkScalerContextProxy::generateMetrics(SkGlyph* glyph, SkArenaAlloc*) { + TRACE_EVENT1("skia", "generateMetrics", "rec", TRACE_STR_COPY(this->getRec().dump().c_str())); + if (this->getProxyTypeface()->isLogging()) { + SkDebugf("GlyphCacheMiss generateMetrics looking for glyph: %x\n generateMetrics: %s\n", + glyph->getPackedID().value(), this->getRec().dump().c_str()); + } + + glyph->fMaskFormat = fRec.fMaskFormat; + glyph->zeroMetrics(); + fDiscardableManager->notifyCacheMiss( + SkStrikeClient::CacheMissType::kGlyphMetrics, fRec.fTextSize); +} + +void SkScalerContextProxy::generateImage(const SkGlyph& glyph) { + TRACE_EVENT1("skia", "generateImage", "rec", TRACE_STR_COPY(this->getRec().dump().c_str())); + if (this->getProxyTypeface()->isLogging()) { + SkDebugf("GlyphCacheMiss generateImage: %s\n", this->getRec().dump().c_str()); + } + + // There is no desperation search here, because if there was an image to be found it was + // copied over with the metrics search. + fDiscardableManager->notifyCacheMiss( + SkStrikeClient::CacheMissType::kGlyphImage, fRec.fTextSize); +} + +bool SkScalerContextProxy::generatePath(const SkGlyph& glyph, SkPath* path) { + TRACE_EVENT1("skia", "generatePath", "rec", TRACE_STR_COPY(this->getRec().dump().c_str())); + if (this->getProxyTypeface()->isLogging()) { + SkDebugf("GlyphCacheMiss generatePath: %s\n", this->getRec().dump().c_str()); + } + + fDiscardableManager->notifyCacheMiss( + SkStrikeClient::CacheMissType::kGlyphPath, fRec.fTextSize); + return false; +} + +sk_sp SkScalerContextProxy::generateDrawable(const SkGlyph&) { + TRACE_EVENT1("skia", "generateDrawable", "rec", TRACE_STR_COPY(this->getRec().dump().c_str())); + if (this->getProxyTypeface()->isLogging()) { + SkDebugf("GlyphCacheMiss generateDrawable: %s\n", this->getRec().dump().c_str()); + } + + fDiscardableManager->notifyCacheMiss( + SkStrikeClient::CacheMissType::kGlyphDrawable, fRec.fTextSize); + return nullptr; +} + +void SkScalerContextProxy::generateFontMetrics(SkFontMetrics* metrics) { + TRACE_EVENT1( + "skia", "generateFontMetrics", "rec", TRACE_STR_COPY(this->getRec().dump().c_str())); + if (this->getProxyTypeface()->isLogging()) { + SkDebugf("GlyphCacheMiss generateFontMetrics: %s\n", this->getRec().dump().c_str()); + } + + // Font metrics aren't really used for render, so just zero out the data and return. + fDiscardableManager->notifyCacheMiss( + SkStrikeClient::CacheMissType::kFontMetrics, fRec.fTextSize); + sk_bzero(metrics, sizeof(*metrics)); +} + +std::optional +SkTypefaceProxyPrototype::MakeFromBuffer(SkReadBuffer& buffer) { + SkASSERT(buffer.isValid()); + const SkTypefaceID typefaceID = buffer.readUInt(); + const int glyphCount = buffer.readInt(); + const int32_t styleValue = buffer.read32(); + const bool isFixedPitch = buffer.readBool(); + const bool glyphMaskNeedsCurrentColor = buffer.readBool(); + + if (buffer.isValid()) { + return SkTypefaceProxyPrototype{ + typefaceID, glyphCount, styleValue, isFixedPitch, glyphMaskNeedsCurrentColor}; + } + + return std::nullopt; +} + +SkTypefaceProxyPrototype::SkTypefaceProxyPrototype(const SkTypeface& typeface) + : fServerTypefaceID{typeface.uniqueID()} + , fGlyphCount{typeface.countGlyphs()} + , fStyleValue{typeface.fontStyle().fValue} + , fIsFixedPitch{typeface.isFixedPitch()} + , fGlyphMaskNeedsCurrentColor{typeface.glyphMaskNeedsCurrentColor()} {} + +SkTypefaceProxyPrototype::SkTypefaceProxyPrototype(SkTypefaceID typefaceID, int glyphCount, + int32_t styleValue, bool isFixedPitch, + bool glyphMaskNeedsCurrentColor) + : fServerTypefaceID {typefaceID} + , fGlyphCount{glyphCount} + , fStyleValue{styleValue} + , fIsFixedPitch{isFixedPitch} + , fGlyphMaskNeedsCurrentColor{glyphMaskNeedsCurrentColor} {} + +void SkTypefaceProxyPrototype::flatten(SkWriteBuffer& buffer) const { + buffer.writeUInt(fServerTypefaceID); + buffer.writeInt(fGlyphCount); + buffer.write32(fStyleValue); + buffer.writeBool(fIsFixedPitch); + buffer.writeBool(fGlyphMaskNeedsCurrentColor); +} + + +SkTypefaceProxy::SkTypefaceProxy(const SkTypefaceProxyPrototype& prototype, + sk_sp manager, + bool isLogging) + : SkTypeface{prototype.style(), prototype.fIsFixedPitch} + , fTypefaceID{prototype.fServerTypefaceID} + , fGlyphCount{prototype.fGlyphCount} + , fIsLogging{isLogging} + , fGlyphMaskNeedsCurrentColor{prototype.fGlyphMaskNeedsCurrentColor} + , fDiscardableManager{std::move(manager)} {} + +SkTypefaceProxy::SkTypefaceProxy(SkTypefaceID typefaceID, + int glyphCount, + const SkFontStyle& style, + bool isFixedPitch, + bool glyphMaskNeedsCurrentColor, + sk_sp manager, + bool isLogging) + : SkTypeface{style, isFixedPitch} + , fTypefaceID{typefaceID} + , fGlyphCount{glyphCount} + , fIsLogging{isLogging} + , fGlyphMaskNeedsCurrentColor(glyphMaskNeedsCurrentColor) + , fDiscardableManager{std::move(manager)} {} + +SkTypefaceProxy* SkScalerContextProxy::getProxyTypeface() const { + return (SkTypefaceProxy*)this->getTypeface(); +} diff --git a/gfx/skia/skia/src/core/SkTypeface_remote.h b/gfx/skia/skia/src/core/SkTypeface_remote.h new file mode 100644 index 0000000000..0f03d38b90 --- /dev/null +++ b/gfx/skia/skia/src/core/SkTypeface_remote.h @@ -0,0 +1,175 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRemoteTypeface_DEFINED +#define SkRemoteTypeface_DEFINED + +#include "include/core/SkFontStyle.h" +#include "include/core/SkPaint.h" +#include "include/core/SkTypeface.h" +#include "include/private/chromium/SkChromeRemoteGlyphCache.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkDescriptor.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkScalerContext.h" + +class SkReadBuffer; +class SkStrikeCache; +class SkTypefaceProxy; +class SkWriteBuffer; + +class SkScalerContextProxy : public SkScalerContext { +public: + SkScalerContextProxy(sk_sp tf, + const SkScalerContextEffects& effects, + const SkDescriptor* desc, + sk_sp manager); + +protected: + bool generateAdvance(SkGlyph* glyph) override; + void generateMetrics(SkGlyph* glyph, SkArenaAlloc*) override; + void generateImage(const SkGlyph& glyph) override; + bool generatePath(const SkGlyph& glyphID, SkPath* path) override; + sk_sp generateDrawable(const SkGlyph&) override; + void generateFontMetrics(SkFontMetrics* metrics) override; + SkTypefaceProxy* getProxyTypeface() const; + +private: + sk_sp fDiscardableManager; + using INHERITED = SkScalerContext; +}; + +// SkTypefaceProxyPrototype is the serialization format for SkTypefaceProxy. +class SkTypefaceProxyPrototype { +public: + static std::optional MakeFromBuffer(SkReadBuffer& buffer); + explicit SkTypefaceProxyPrototype(const SkTypeface& typeface); + SkTypefaceProxyPrototype(SkTypefaceID typefaceID, + int glyphCount, + int32_t styleValue, + bool isFixedPitch, + bool glyphMaskNeedsCurrentColor); + + void flatten(SkWriteBuffer&buffer) const; + SkTypefaceID serverTypefaceID() const { return fServerTypefaceID; } + +private: + friend class SkTypefaceProxy; + SkFontStyle style() const { + SkFontStyle style; + style.fValue = fStyleValue; + return style; + } + const SkTypefaceID fServerTypefaceID; + const int fGlyphCount; + const int32_t fStyleValue; + const bool fIsFixedPitch; + // Used for COLRv0 or COLRv1 fonts that may need the 0xFFFF special palette + // index to represent foreground color. This information needs to be on here + // to determine how this typeface can be cached. + const bool fGlyphMaskNeedsCurrentColor; +}; + +class SkTypefaceProxy : public SkTypeface { +public: + SkTypefaceProxy(const SkTypefaceProxyPrototype& prototype, + sk_sp manager, + bool isLogging = true); + + SkTypefaceProxy(SkTypefaceID typefaceID, + int glyphCount, + const SkFontStyle& style, + bool isFixedPitch, + bool glyphMaskNeedsCurrentColor, + sk_sp manager, + bool isLogging = true); + + SkTypefaceID remoteTypefaceID() const {return fTypefaceID;} + + int glyphCount() const {return fGlyphCount;} + + bool isLogging() const {return fIsLogging;} + +protected: + int onGetUPEM() const override { SK_ABORT("Should never be called."); } + std::unique_ptr onOpenStream(int* ttcIndex) const override { + SK_ABORT("Should never be called."); + } + sk_sp onMakeClone(const SkFontArguments& args) const override { + SK_ABORT("Should never be called."); + } + bool onGlyphMaskNeedsCurrentColor() const override { + return fGlyphMaskNeedsCurrentColor; + } + int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const override { + SK_ABORT("Should never be called."); + } + int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const override { + SK_ABORT("Should never be called."); + } + void onGetFamilyName(SkString* familyName) const override { + // Used by SkStrikeCache::DumpMemoryStatistics. + *familyName = ""; + } + bool onGetPostScriptName(SkString*) const override { + SK_ABORT("Should never be called."); + } + SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override { + SK_ABORT("Should never be called."); + } + int onGetTableTags(SkFontTableTag tags[]) const override { + SK_ABORT("Should never be called."); + } + size_t onGetTableData(SkFontTableTag, size_t offset, size_t length, void* data) const override { + SK_ABORT("Should never be called."); + } + std::unique_ptr onCreateScalerContext( + const SkScalerContextEffects& effects, const SkDescriptor* desc) const override + { + return std::make_unique( + sk_ref_sp(const_cast(this)), effects, desc, fDiscardableManager); + } + void onFilterRec(SkScalerContextRec* rec) const override { + // The rec filtering is already applied by the server when generating + // the glyphs. + } + void onGetFontDescriptor(SkFontDescriptor*, bool*) const override { + SK_ABORT("Should never be called."); + } + void getGlyphToUnicodeMap(SkUnichar*) const override { + SK_ABORT("Should never be called."); + } + + void getPostScriptGlyphNames(SkString*) const override { + SK_ABORT("Should never be called."); + } + + std::unique_ptr onGetAdvancedMetrics() const override { + SK_ABORT("Should never be called."); + } + void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override { + SK_ABORT("Should never be called."); + } + int onCountGlyphs() const override { + return this->glyphCount(); + } + + void* onGetCTFontRef() const override { + SK_ABORT("Should never be called."); + } + +private: + const SkTypefaceID fTypefaceID; + const int fGlyphCount; + const bool fIsLogging; + const bool fGlyphMaskNeedsCurrentColor; + sk_sp fDiscardableManager; +}; + +#endif // SkRemoteTypeface_DEFINED diff --git a/gfx/skia/skia/src/core/SkUnPreMultiply.cpp b/gfx/skia/skia/src/core/SkUnPreMultiply.cpp new file mode 100644 index 0000000000..2b999190ce --- /dev/null +++ b/gfx/skia/skia/src/core/SkUnPreMultiply.cpp @@ -0,0 +1,79 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkUnPreMultiply.h" +#include "include/private/SkColorData.h" + +SkColor SkUnPreMultiply::PMColorToColor(SkPMColor c) { + const unsigned a = SkGetPackedA32(c); + const Scale scale = GetScale(a); + return SkColorSetARGB(a, + ApplyScale(scale, SkGetPackedR32(c)), + ApplyScale(scale, SkGetPackedG32(c)), + ApplyScale(scale, SkGetPackedB32(c))); +} + +const uint32_t SkUnPreMultiply::gTable[] = { + 0x00000000, 0xFF000000, 0x7F800000, 0x55000000, 0x3FC00000, 0x33000000, 0x2A800000, 0x246DB6DB, + 0x1FE00000, 0x1C555555, 0x19800000, 0x172E8BA3, 0x15400000, 0x139D89D9, 0x1236DB6E, 0x11000000, + 0x0FF00000, 0x0F000000, 0x0E2AAAAB, 0x0D6BCA1B, 0x0CC00000, 0x0C249249, 0x0B9745D1, 0x0B1642C8, + 0x0AA00000, 0x0A333333, 0x09CEC4EC, 0x0971C71C, 0x091B6DB7, 0x08CB08D4, 0x08800000, 0x0839CE74, + 0x07F80000, 0x07BA2E8C, 0x07800000, 0x07492492, 0x07155555, 0x06E45307, 0x06B5E50D, 0x0689D89E, + 0x06600000, 0x063831F4, 0x06124925, 0x05EE23B9, 0x05CBA2E9, 0x05AAAAAB, 0x058B2164, 0x056CEFA9, + 0x05500000, 0x05343EB2, 0x0519999A, 0x05000000, 0x04E76276, 0x04CFB2B8, 0x04B8E38E, 0x04A2E8BA, + 0x048DB6DB, 0x0479435E, 0x0465846A, 0x045270D0, 0x04400000, 0x042E29F8, 0x041CE73A, 0x040C30C3, + 0x03FC0000, 0x03EC4EC5, 0x03DD1746, 0x03CE540F, 0x03C00000, 0x03B21643, 0x03A49249, 0x03976FC6, + 0x038AAAAB, 0x037E3F20, 0x03722983, 0x03666666, 0x035AF287, 0x034FCACE, 0x0344EC4F, 0x033A5441, + 0x03300000, 0x0325ED09, 0x031C18FA, 0x0312818B, 0x03092492, 0x03000000, 0x02F711DC, 0x02EE5847, + 0x02E5D174, 0x02DD7BAF, 0x02D55555, 0x02CD5CD6, 0x02C590B2, 0x02BDEF7C, 0x02B677D4, 0x02AF286C, + 0x02A80000, 0x02A0FD5C, 0x029A1F59, 0x029364D9, 0x028CCCCD, 0x0286562E, 0x02800000, 0x0279C952, + 0x0273B13B, 0x026DB6DB, 0x0267D95C, 0x026217ED, 0x025C71C7, 0x0256E62A, 0x0251745D, 0x024C1BAD, + 0x0246DB6E, 0x0241B2F9, 0x023CA1AF, 0x0237A6F5, 0x0232C235, 0x022DF2DF, 0x02293868, 0x02249249, + 0x02200000, 0x021B810F, 0x021714FC, 0x0212BB51, 0x020E739D, 0x020A3D71, 0x02061862, 0x02020408, + 0x01FE0000, 0x01FA0BE8, 0x01F62762, 0x01F25214, 0x01EE8BA3, 0x01EAD3BB, 0x01E72A08, 0x01E38E39, + 0x01E00000, 0x01DC7F11, 0x01D90B21, 0x01D5A3EA, 0x01D24925, 0x01CEFA8E, 0x01CBB7E3, 0x01C880E5, + 0x01C55555, 0x01C234F7, 0x01BF1F90, 0x01BC14E6, 0x01B914C2, 0x01B61EED, 0x01B33333, 0x01B05161, + 0x01AD7943, 0x01AAAAAB, 0x01A7E567, 0x01A5294A, 0x01A27627, 0x019FCBD2, 0x019D2A20, 0x019A90E8, + 0x01980000, 0x01957741, 0x0192F685, 0x01907DA5, 0x018E0C7D, 0x018BA2E9, 0x018940C5, 0x0186E5F1, + 0x01849249, 0x018245AE, 0x01800000, 0x017DC11F, 0x017B88EE, 0x0179574E, 0x01772C23, 0x01750750, + 0x0172E8BA, 0x0170D045, 0x016EBDD8, 0x016CB157, 0x016AAAAB, 0x0168A9B9, 0x0166AE6B, 0x0164B8A8, + 0x0162C859, 0x0160DD68, 0x015EF7BE, 0x015D1746, 0x015B3BEA, 0x01596596, 0x01579436, 0x0155C7B5, + 0x01540000, 0x01523D04, 0x01507EAE, 0x014EC4EC, 0x014D0FAC, 0x014B5EDD, 0x0149B26D, 0x01480A4B, + 0x01466666, 0x0144C6B0, 0x01432B17, 0x0141938C, 0x01400000, 0x013E7064, 0x013CE4A9, 0x013B5CC1, + 0x0139D89E, 0x01385831, 0x0136DB6E, 0x01356246, 0x0133ECAE, 0x01327A97, 0x01310BF6, 0x012FA0BF, + 0x012E38E4, 0x012CD45A, 0x012B7315, 0x012A150B, 0x0128BA2F, 0x01276276, 0x01260DD6, 0x0124BC45, + 0x01236DB7, 0x01222222, 0x0120D97D, 0x011F93BC, 0x011E50D8, 0x011D10C5, 0x011BD37A, 0x011A98EF, + 0x0119611A, 0x01182BF3, 0x0116F970, 0x0115C988, 0x01149C34, 0x0113716B, 0x01124925, 0x01112359, + 0x01100000, 0x010EDF12, 0x010DC087, 0x010CA458, 0x010B8A7E, 0x010A72F0, 0x01095DA9, 0x01084AA0, + 0x010739CE, 0x01062B2E, 0x01051EB8, 0x01041466, 0x01030C31, 0x01020612, 0x01010204, 0x01000000 +}; + +#ifdef BUILD_DIVIDE_TABLE +void SkUnPreMultiply_BuildTable() { + for (unsigned i = 0; i <= 255; i++) { + uint32_t scale; + + if (0 == i) { + scale = 0; + } else { + scale = ((255 << 24) + (i >> 1)) / i; + } + + SkDebugf(" 0x%08X,", scale); + if ((i & 7) == 7) { + SkDebugf("\n"); + } + + // test the result + for (int j = 1; j <= i; j++) { + uint32_t test = (j * scale + (1 << 23)) >> 24; + uint32_t div = roundf(j * 255.0f / i); + int diff = SkAbs32(test - div); + SkASSERT(diff <= 1 && test <= 255); + } + } +} +#endif diff --git a/gfx/skia/skia/src/core/SkVM.cpp b/gfx/skia/skia/src/core/SkVM.cpp new file mode 100644 index 0000000000..e83b91632d --- /dev/null +++ b/gfx/skia/skia/src/core/SkVM.cpp @@ -0,0 +1,4117 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkThreadID.h" +#include "src/base/SkHalf.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkCpu.h" +#include "src/core/SkEnumerate.h" +#include "src/core/SkOpts.h" +#include "src/core/SkStreamPriv.h" +#include "src/core/SkVM.h" +#include "src/utils/SkVMVisualizer.h" +#include +#include +#include + +#if !defined(SK_BUILD_FOR_WIN) +#include +#endif + +bool gSkVMAllowJIT{false}; +bool gSkVMJITViaDylib{false}; + +#if defined(SKVM_JIT) + #if defined(SK_BUILD_FOR_WIN) + #include "src/base/SkLeanWindows.h" + #include + + static void* alloc_jit_buffer(size_t* len) { + return VirtualAlloc(NULL, *len, MEM_RESERVE|MEM_COMMIT, PAGE_READWRITE); + } + static void remap_as_executable(void* ptr, size_t len) { + DWORD old; + VirtualProtect(ptr, len, PAGE_EXECUTE_READ, &old); + SkASSERT(old == PAGE_READWRITE); + } + static void unmap_jit_buffer(void* ptr, size_t len) { + VirtualFree(ptr, 0, MEM_RELEASE); + } + static void close_dylib(void* dylib) { + SkASSERT(false); // TODO? For now just assert we never make one. + } + #else + #include + #include + + static void* alloc_jit_buffer(size_t* len) { + // While mprotect and VirtualAlloc both work at page granularity, + // mprotect doesn't round up for you, and instead requires *len is at page granularity. + const size_t page = sysconf(_SC_PAGESIZE); + *len = ((*len + page - 1) / page) * page; + return mmap(nullptr,*len, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1,0); + } + static void remap_as_executable(void* ptr, size_t len) { + mprotect(ptr, len, PROT_READ|PROT_EXEC); + __builtin___clear_cache((char*)ptr, + (char*)ptr + len); + } + static void unmap_jit_buffer(void* ptr, size_t len) { + munmap(ptr, len); + } + static void close_dylib(void* dylib) { + dlclose(dylib); + } + #endif +#endif + +// JIT code isn't MSAN-instrumented, so we won't see when it uses +// uninitialized memory, and we'll not see the writes it makes as properly +// initializing memory. Instead force the interpreter, which should let +// MSAN see everything our programs do properly. +// +// Similarly, we can't get ASAN's checks unless we let it instrument our interpreter. +#if defined(__has_feature) + #if __has_feature(memory_sanitizer) || __has_feature(address_sanitizer) + #define SKVM_JIT_BUT_IGNORE_IT + #endif +#endif + +#if defined(SKSL_STANDALONE) + // skslc needs to link against this module (for the VM code generator). This module pulls in + // color-space code, but attempting to add those transitive dependencies to skslc gets out of + // hand. So we terminate the chain here with stub functions. Note that skslc's usage of SkVM + // never cares about color management. + skvm::F32 sk_program_transfer_fn( + skvm::F32 v, skcms_TFType tf_type, + skvm::F32 G, skvm::F32 A, skvm::F32 B, skvm::F32 C, skvm::F32 D, skvm::F32 E, skvm::F32 F) { + return v; + } + + const skcms_TransferFunction* skcms_sRGB_TransferFunction() { return nullptr; } + const skcms_TransferFunction* skcms_sRGB_Inverse_TransferFunction() { return nullptr; } +#endif + +namespace skvm { + + static Features detect_features() { + static const bool fma = + #if defined(SK_CPU_X86) + SkCpu::Supports(SkCpu::HSW); + #elif defined(SK_CPU_ARM64) + true; + #else + false; + #endif + + static const bool fp16 = false; // TODO + + return { fma, fp16 }; + } + + Builder::Builder(bool createDuplicates) + : fFeatures(detect_features()), fCreateDuplicates(createDuplicates) {} + Builder::Builder(Features features, bool createDuplicates) + : fFeatures(features ), fCreateDuplicates(createDuplicates) {} + + struct Program::Impl { + std::vector instructions; + int regs = 0; + int loop = 0; + std::vector strides; + std::vector traceHooks; + std::unique_ptr visualizer; + + std::atomic jit_entry{nullptr}; // TODO: minimal std::memory_orders + size_t jit_size = 0; + void* dylib = nullptr; + }; + + // Debugging tools, mostly for printing various data structures out to a stream. + + namespace { + struct V { Val id; }; + struct R { Reg id; }; + struct Shift { int bits; }; + struct Splat { int bits; }; + struct Hex { int bits; }; + struct TraceHookID { int bits; }; + // For op `trace_line` + struct Line { int bits; }; + // For op `trace_var` + struct VarSlot { int bits; }; + // For op `trace_enter`/`trace_exit` + struct FnIdx { int bits; }; + + static void write(SkWStream* o, const char* s) { + o->writeText(s); + } + + static const char* name(Op op) { + switch (op) { + #define M(x) case Op::x: return #x; + SKVM_OPS(M) + #undef M + } + return "unknown op"; + } + + static void write(SkWStream* o, Op op) { + o->writeText(name(op)); + } + static void write(SkWStream* o, Ptr p) { + write(o, "ptr"); + o->writeDecAsText(p.ix); + } + static void write(SkWStream* o, V v) { + write(o, "v"); + o->writeDecAsText(v.id); + } + static void write(SkWStream* o, R r) { + write(o, "r"); + o->writeDecAsText(r.id); + } + static void write(SkWStream* o, Shift s) { + o->writeDecAsText(s.bits); + } + static void write(SkWStream* o, Splat s) { + float f; + memcpy(&f, &s.bits, 4); + o->writeHexAsText(s.bits); + write(o, " ("); + o->writeScalarAsText(f); + write(o, ")"); + } + static void write(SkWStream* o, Hex h) { + o->writeHexAsText(h.bits); + } + static void write(SkWStream* o, TraceHookID h) { + o->writeDecAsText(h.bits); + } + static void write(SkWStream* o, Line d) { + write(o, "L"); + o->writeDecAsText(d.bits); + } + static void write(SkWStream* o, VarSlot s) { + write(o, "$"); + o->writeDecAsText(s.bits); + } + static void write(SkWStream* o, FnIdx s) { + write(o, "F"); + o->writeDecAsText(s.bits); + } + template + static void write(SkWStream* o, T first, Ts... rest) { + write(o, first); + write(o, " "); + write(o, rest...); + } + } // namespace + + static void write_one_instruction(Val id, const OptimizedInstruction& inst, SkWStream* o) { + Op op = inst.op; + Val x = inst.x, + y = inst.y, + z = inst.z, + w = inst.w; + int immA = inst.immA, + immB = inst.immB, + immC = inst.immC; + switch (op) { + case Op::assert_true: write(o, op, V{x}, V{y}); break; + + case Op::trace_line: write(o, op, TraceHookID{immA}, V{x}, V{y}, Line{immB}); break; + case Op::trace_var: write(o, op, TraceHookID{immA}, V{x}, V{y}, + VarSlot{immB}, "=", V{z}); break; + case Op::trace_enter: write(o, op, TraceHookID{immA}, V{x}, V{y}, FnIdx{immB}); break; + case Op::trace_exit: write(o, op, TraceHookID{immA}, V{x}, V{y}, FnIdx{immB}); break; + case Op::trace_scope: write(o, op, TraceHookID{immA}, V{x}, V{y}, Shift{immB}); break; + + case Op::store8: write(o, op, Ptr{immA}, V{x} ); break; + case Op::store16: write(o, op, Ptr{immA}, V{x} ); break; + case Op::store32: write(o, op, Ptr{immA}, V{x} ); break; + case Op::store64: write(o, op, Ptr{immA}, V{x},V{y} ); break; + case Op::store128: write(o, op, Ptr{immA}, V{x},V{y},V{z},V{w}); break; + + case Op::index: write(o, V{id}, "=", op); break; + + case Op::load8: write(o, V{id}, "=", op, Ptr{immA}); break; + case Op::load16: write(o, V{id}, "=", op, Ptr{immA}); break; + case Op::load32: write(o, V{id}, "=", op, Ptr{immA}); break; + case Op::load64: write(o, V{id}, "=", op, Ptr{immA}, Hex{immB}); break; + case Op::load128: write(o, V{id}, "=", op, Ptr{immA}, Hex{immB}); break; + + case Op::gather8: write(o, V{id}, "=", op, Ptr{immA}, Hex{immB}, V{x}); break; + case Op::gather16: write(o, V{id}, "=", op, Ptr{immA}, Hex{immB}, V{x}); break; + case Op::gather32: write(o, V{id}, "=", op, Ptr{immA}, Hex{immB}, V{x}); break; + + case Op::uniform32: write(o, V{id}, "=", op, Ptr{immA}, Hex{immB}); break; + case Op::array32: write(o, V{id}, "=", op, Ptr{immA}, Hex{immB}, Hex{immC}); break; + + case Op::splat: write(o, V{id}, "=", op, Splat{immA}); break; + + case Op:: add_f32: write(o, V{id}, "=", op, V{x}, V{y} ); break; + case Op:: sub_f32: write(o, V{id}, "=", op, V{x}, V{y} ); break; + case Op:: mul_f32: write(o, V{id}, "=", op, V{x}, V{y} ); break; + case Op:: div_f32: write(o, V{id}, "=", op, V{x}, V{y} ); break; + case Op:: min_f32: write(o, V{id}, "=", op, V{x}, V{y} ); break; + case Op:: max_f32: write(o, V{id}, "=", op, V{x}, V{y} ); break; + case Op:: fma_f32: write(o, V{id}, "=", op, V{x}, V{y}, V{z}); break; + case Op:: fms_f32: write(o, V{id}, "=", op, V{x}, V{y}, V{z}); break; + case Op::fnma_f32: write(o, V{id}, "=", op, V{x}, V{y}, V{z}); break; + + + case Op::sqrt_f32: write(o, V{id}, "=", op, V{x}); break; + + case Op:: eq_f32: write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::neq_f32: write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op:: gt_f32: write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::gte_f32: write(o, V{id}, "=", op, V{x}, V{y}); break; + + + case Op::add_i32: write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::sub_i32: write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::mul_i32: write(o, V{id}, "=", op, V{x}, V{y}); break; + + case Op::shl_i32: write(o, V{id}, "=", op, V{x}, Shift{immA}); break; + case Op::shr_i32: write(o, V{id}, "=", op, V{x}, Shift{immA}); break; + case Op::sra_i32: write(o, V{id}, "=", op, V{x}, Shift{immA}); break; + + case Op::eq_i32: write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::gt_i32: write(o, V{id}, "=", op, V{x}, V{y}); break; + + + case Op::bit_and : write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::bit_or : write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::bit_xor : write(o, V{id}, "=", op, V{x}, V{y}); break; + case Op::bit_clear: write(o, V{id}, "=", op, V{x}, V{y}); break; + + case Op::select: write(o, V{id}, "=", op, V{x}, V{y}, V{z}); break; + + case Op::ceil: write(o, V{id}, "=", op, V{x}); break; + case Op::floor: write(o, V{id}, "=", op, V{x}); break; + case Op::to_f32: write(o, V{id}, "=", op, V{x}); break; + case Op::to_fp16: write(o, V{id}, "=", op, V{x}); break; + case Op::from_fp16: write(o, V{id}, "=", op, V{x}); break; + case Op::trunc: write(o, V{id}, "=", op, V{x}); break; + case Op::round: write(o, V{id}, "=", op, V{x}); break; + + case Op::duplicate: write(o, V{id}, "=", op, Hex{immA}); break; + } + + write(o, "\n"); + } + + void Builder::dump(SkWStream* o) const { + SkDebugfStream debug; + if (!o) { o = &debug; } + + std::vector optimized = this->optimize(); + o->writeDecAsText(optimized.size()); + o->writeText(" values (originally "); + o->writeDecAsText(fProgram.size()); + o->writeText("):\n"); + for (Val id = 0; id < (Val)optimized.size(); id++) { + const OptimizedInstruction& inst = optimized[id]; + write(o, inst.can_hoist ? "↑ " : " "); + write_one_instruction(id, inst, o); + } + } + + void Program::visualize(SkWStream* output) const { + if (fImpl->visualizer) { + fImpl->visualizer->dump(output); + } + } + + viz::Visualizer* Program::visualizer() { return fImpl->visualizer.get(); } + void Program::dump(SkWStream* o) const { + SkDebugfStream debug; + if (!o) { o = &debug; } + + o->writeDecAsText(fImpl->regs); + o->writeText(" registers, "); + o->writeDecAsText(fImpl->instructions.size()); + o->writeText(" instructions:\n"); + for (Val i = 0; i < (Val)fImpl->instructions.size(); i++) { + if (i == fImpl->loop) { write(o, "loop:\n"); } + o->writeDecAsText(i); + o->writeText("\t"); + if (i >= fImpl->loop) { write(o, " "); } + const InterpreterInstruction& inst = fImpl->instructions[i]; + Op op = inst.op; + Reg d = inst.d, + x = inst.x, + y = inst.y, + z = inst.z, + w = inst.w; + int immA = inst.immA, + immB = inst.immB, + immC = inst.immC; + switch (op) { + case Op::assert_true: write(o, op, R{x}, R{y}); break; + + case Op::trace_line: write(o, op, TraceHookID{immA}, + R{x}, R{y}, Line{immB}); break; + case Op::trace_var: write(o, op, TraceHookID{immA}, R{x}, R{y}, + VarSlot{immB}, "=", R{z}); break; + case Op::trace_enter: write(o, op, TraceHookID{immA}, + R{x}, R{y}, FnIdx{immB}); break; + case Op::trace_exit: write(o, op, TraceHookID{immA}, + R{x}, R{y}, FnIdx{immB}); break; + case Op::trace_scope: write(o, op, TraceHookID{immA}, + R{x}, R{y}, Shift{immB}); break; + + case Op::store8: write(o, op, Ptr{immA}, R{x} ); break; + case Op::store16: write(o, op, Ptr{immA}, R{x} ); break; + case Op::store32: write(o, op, Ptr{immA}, R{x} ); break; + case Op::store64: write(o, op, Ptr{immA}, R{x}, R{y} ); break; + case Op::store128: write(o, op, Ptr{immA}, R{x}, R{y}, R{z}, R{w}); break; + + case Op::index: write(o, R{d}, "=", op); break; + + case Op::load8: write(o, R{d}, "=", op, Ptr{immA}); break; + case Op::load16: write(o, R{d}, "=", op, Ptr{immA}); break; + case Op::load32: write(o, R{d}, "=", op, Ptr{immA}); break; + case Op::load64: write(o, R{d}, "=", op, Ptr{immA}, Hex{immB}); break; + case Op::load128: write(o, R{d}, "=", op, Ptr{immA}, Hex{immB}); break; + + case Op::gather8: write(o, R{d}, "=", op, Ptr{immA}, Hex{immB}, R{x}); break; + case Op::gather16: write(o, R{d}, "=", op, Ptr{immA}, Hex{immB}, R{x}); break; + case Op::gather32: write(o, R{d}, "=", op, Ptr{immA}, Hex{immB}, R{x}); break; + + case Op::uniform32: write(o, R{d}, "=", op, Ptr{immA}, Hex{immB}); break; + case Op::array32: write(o, R{d}, "=", op, Ptr{immA}, Hex{immB}, Hex{immC}); break; + + case Op::splat: write(o, R{d}, "=", op, Splat{immA}); break; + + case Op::add_f32: write(o, R{d}, "=", op, R{x}, R{y} ); break; + case Op::sub_f32: write(o, R{d}, "=", op, R{x}, R{y} ); break; + case Op::mul_f32: write(o, R{d}, "=", op, R{x}, R{y} ); break; + case Op::div_f32: write(o, R{d}, "=", op, R{x}, R{y} ); break; + case Op::min_f32: write(o, R{d}, "=", op, R{x}, R{y} ); break; + case Op::max_f32: write(o, R{d}, "=", op, R{x}, R{y} ); break; + case Op::fma_f32: write(o, R{d}, "=", op, R{x}, R{y}, R{z}); break; + case Op::fms_f32: write(o, R{d}, "=", op, R{x}, R{y}, R{z}); break; + case Op::fnma_f32: write(o, R{d}, "=", op, R{x}, R{y}, R{z}); break; + + case Op::sqrt_f32: write(o, R{d}, "=", op, R{x}); break; + + case Op:: eq_f32: write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::neq_f32: write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op:: gt_f32: write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::gte_f32: write(o, R{d}, "=", op, R{x}, R{y}); break; + + + case Op::add_i32: write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::sub_i32: write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::mul_i32: write(o, R{d}, "=", op, R{x}, R{y}); break; + + case Op::shl_i32: write(o, R{d}, "=", op, R{x}, Shift{immA}); break; + case Op::shr_i32: write(o, R{d}, "=", op, R{x}, Shift{immA}); break; + case Op::sra_i32: write(o, R{d}, "=", op, R{x}, Shift{immA}); break; + + case Op::eq_i32: write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::gt_i32: write(o, R{d}, "=", op, R{x}, R{y}); break; + + case Op::bit_and : write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::bit_or : write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::bit_xor : write(o, R{d}, "=", op, R{x}, R{y}); break; + case Op::bit_clear: write(o, R{d}, "=", op, R{x}, R{y}); break; + + case Op::select: write(o, R{d}, "=", op, R{x}, R{y}, R{z}); break; + + case Op::ceil: write(o, R{d}, "=", op, R{x}); break; + case Op::floor: write(o, R{d}, "=", op, R{x}); break; + case Op::to_f32: write(o, R{d}, "=", op, R{x}); break; + case Op::to_fp16: write(o, R{d}, "=", op, R{x}); break; + case Op::from_fp16: write(o, R{d}, "=", op, R{x}); break; + case Op::trunc: write(o, R{d}, "=", op, R{x}); break; + case Op::round: write(o, R{d}, "=", op, R{x}); break; + + case Op::duplicate: write(o, R{d}, "=", op, Hex{immA}); break; + } + write(o, "\n"); + } + } + std::vector eliminate_dead_code(std::vector program, + viz::Visualizer* visualizer) { + // Determine which Instructions are live by working back from side effects. + std::vector live(program.size(), false); + for (Val id = program.size(); id--;) { + if (live[id] || has_side_effect(program[id].op)) { + live[id] = true; + const Instruction& inst = program[id]; + for (Val arg : {inst.x, inst.y, inst.z, inst.w}) { + if (arg != NA) { live[arg] = true; } + } + } + } + + // Rewrite the program with only live Instructions: + // - remap IDs in live Instructions to what they'll be once dead Instructions are removed; + // - then actually remove the dead Instructions. + std::vector new_id(program.size(), NA); + for (Val id = 0, next = 0; id < (Val)program.size(); id++) { + if (live[id]) { + Instruction& inst = program[id]; + for (Val* arg : {&inst.x, &inst.y, &inst.z, &inst.w}) { + if (*arg != NA) { + *arg = new_id[*arg]; + SkASSERT(*arg != NA); + } + } + new_id[id] = next++; + } + } + + if (visualizer) { + visualizer->addInstructions(program); + visualizer->markAsDeadCode(live, new_id); + } + + // Eliminate any non-live ops. + auto it = std::remove_if(program.begin(), program.end(), [&](const Instruction& inst) { + Val id = (Val)(&inst - program.data()); + return !live[id]; + }); + program.erase(it, program.end()); + + return program; + } + + std::vector finalize(const std::vector program, + viz::Visualizer* visualizer) { + std::vector optimized(program.size()); + for (Val id = 0; id < (Val)program.size(); id++) { + Instruction inst = program[id]; + optimized[id] = {inst.op, inst.x,inst.y,inst.z,inst.w, + inst.immA,inst.immB,inst.immC, + /*death=*/id, /*can_hoist=*/true}; + } + + // Each Instruction's inputs need to live at least until that Instruction issues. + for (Val id = 0; id < (Val)optimized.size(); id++) { + OptimizedInstruction& inst = optimized[id]; + for (Val arg : {inst.x, inst.y, inst.z, inst.w}) { + // (We're walking in order, so this is the same as max()ing with the existing Val.) + if (arg != NA) { optimized[arg].death = id; } + } + } + + // Mark which values don't depend on the loop and can be hoisted. + for (OptimizedInstruction& inst : optimized) { + // Varying loads (and gathers) and stores cannot be hoisted out of the loop. + if (is_always_varying(inst.op) || is_trace(inst.op)) { + inst.can_hoist = false; + } + + // If any of an instruction's inputs can't be hoisted, it can't be hoisted itself. + if (inst.can_hoist) { + for (Val arg : {inst.x, inst.y, inst.z, inst.w}) { + if (arg != NA) { inst.can_hoist &= optimized[arg].can_hoist; } + } + } + } + + // Extend the lifetime of any hoisted value that's used in the loop to infinity. + for (OptimizedInstruction& inst : optimized) { + if (!inst.can_hoist /*i.e. we're in the loop, so the arguments are used-in-loop*/) { + for (Val arg : {inst.x, inst.y, inst.z, inst.w}) { + if (arg != NA && optimized[arg].can_hoist) { + optimized[arg].death = (Val)program.size(); + } + } + } + } + + if (visualizer) { + visualizer->finalize(program, optimized); + } + + return optimized; + } + + std::vector Builder::optimize(viz::Visualizer* visualizer) const { + std::vector program = this->program(); + program = eliminate_dead_code(std::move(program), visualizer); + return finalize (std::move(program), visualizer); + } + + Program Builder::done(const char* debug_name, + bool allow_jit) const { + return this->done(debug_name, allow_jit, /*visualizer=*/nullptr); + } + + Program Builder::done(const char* debug_name, + bool allow_jit, + std::unique_ptr visualizer) const { + char buf[64] = "skvm-jit-"; + if (!debug_name) { + *SkStrAppendU32(buf+9, this->hash()) = '\0'; + debug_name = buf; + } + + auto optimized = this->optimize(visualizer ? visualizer.get() : nullptr); + return {optimized, + std::move(visualizer), + fStrides, + fTraceHooks, debug_name, allow_jit}; + } + + uint64_t Builder::hash() const { + uint32_t lo = SkOpts::hash(fProgram.data(), fProgram.size() * sizeof(Instruction), 0), + hi = SkOpts::hash(fProgram.data(), fProgram.size() * sizeof(Instruction), 1); + return (uint64_t)lo | (uint64_t)hi << 32; + } + + bool operator!=(Ptr a, Ptr b) { return a.ix != b.ix; } + + bool operator==(const Instruction& a, const Instruction& b) { + return a.op == b.op + && a.x == b.x + && a.y == b.y + && a.z == b.z + && a.w == b.w + && a.immA == b.immA + && a.immB == b.immB + && a.immC == b.immC; + } + + uint32_t InstructionHash::operator()(const Instruction& inst, uint32_t seed) const { + return SkOpts::hash(&inst, sizeof(inst), seed); + } + + + // Most instructions produce a value and return it by ID, + // the value-producing instruction's own index in the program vector. + Val Builder::push(Instruction inst) { + // Basic common subexpression elimination: + // if we've already seen this exact Instruction, use it instead of creating a new one. + // + // But we never dedup loads or stores: an intervening store could change that memory. + // Uniforms and gathers touch only uniform memory, so they're fine to dedup, + // and index is varying but doesn't touch memory, so it's fine to dedup too. + if (!touches_varying_memory(inst.op) && !is_trace(inst.op)) { + if (Val* id = fIndex.find(inst)) { + if (fCreateDuplicates) { + inst.op = Op::duplicate; + inst.immA = *id; + fProgram.push_back(inst); + } + return *id; + } + } + + Val id = static_cast(fProgram.size()); + fProgram.push_back(inst); + fIndex.set(inst, id); + return id; + } + + Ptr Builder::arg(int stride) { + int ix = (int)fStrides.size(); + fStrides.push_back(stride); + return {ix}; + } + + void Builder::assert_true(I32 cond, I32 debug) { + #ifdef SK_DEBUG + int imm; + if (this->allImm(cond.id,&imm)) { SkASSERT(imm); return; } + (void)push(Op::assert_true, cond.id, debug.id); + #endif + } + + int Builder::attachTraceHook(SkSL::TraceHook* hook) { + int traceHookID = (int)fTraceHooks.size(); + fTraceHooks.push_back(hook); + return traceHookID; + } + + bool Builder::mergeMasks(I32& mask, I32& traceMask) { + if (this->isImm(mask.id, 0)) { return false; } + if (this->isImm(traceMask.id, 0)) { return false; } + if (this->isImm(mask.id, ~0)) { mask = traceMask; } + if (this->isImm(traceMask.id,~0)) { traceMask = mask; } + return true; + } + + void Builder::trace_line(int traceHookID, I32 mask, I32 traceMask, int line) { + SkASSERT(traceHookID >= 0); + SkASSERT(traceHookID < (int)fTraceHooks.size()); + if (!this->mergeMasks(mask, traceMask)) { return; } + (void)push(Op::trace_line, mask.id,traceMask.id,NA,NA, traceHookID, line); + } + void Builder::trace_var(int traceHookID, I32 mask, I32 traceMask, int slot, I32 val) { + SkASSERT(traceHookID >= 0); + SkASSERT(traceHookID < (int)fTraceHooks.size()); + if (!this->mergeMasks(mask, traceMask)) { return; } + (void)push(Op::trace_var, mask.id,traceMask.id,val.id,NA, traceHookID, slot); + } + void Builder::trace_enter(int traceHookID, I32 mask, I32 traceMask, int fnIdx) { + SkASSERT(traceHookID >= 0); + SkASSERT(traceHookID < (int)fTraceHooks.size()); + if (!this->mergeMasks(mask, traceMask)) { return; } + (void)push(Op::trace_enter, mask.id,traceMask.id,NA,NA, traceHookID, fnIdx); + } + void Builder::trace_exit(int traceHookID, I32 mask, I32 traceMask, int fnIdx) { + SkASSERT(traceHookID >= 0); + SkASSERT(traceHookID < (int)fTraceHooks.size()); + if (!this->mergeMasks(mask, traceMask)) { return; } + (void)push(Op::trace_exit, mask.id,traceMask.id,NA,NA, traceHookID, fnIdx); + } + void Builder::trace_scope(int traceHookID, I32 mask, I32 traceMask, int delta) { + SkASSERT(traceHookID >= 0); + SkASSERT(traceHookID < (int)fTraceHooks.size()); + if (!this->mergeMasks(mask, traceMask)) { return; } + (void)push(Op::trace_scope, mask.id,traceMask.id,NA,NA, traceHookID, delta); + } + + void Builder::store8 (Ptr ptr, I32 val) { (void)push(Op::store8 , val.id,NA,NA,NA, ptr.ix); } + void Builder::store16(Ptr ptr, I32 val) { (void)push(Op::store16, val.id,NA,NA,NA, ptr.ix); } + void Builder::store32(Ptr ptr, I32 val) { (void)push(Op::store32, val.id,NA,NA,NA, ptr.ix); } + void Builder::store64(Ptr ptr, I32 lo, I32 hi) { + (void)push(Op::store64, lo.id,hi.id,NA,NA, ptr.ix); + } + void Builder::store128(Ptr ptr, I32 x, I32 y, I32 z, I32 w) { + (void)push(Op::store128, x.id,y.id,z.id,w.id, ptr.ix); + } + + I32 Builder::index() { return {this, push(Op::index)}; } + + I32 Builder::load8 (Ptr ptr) { return {this, push(Op::load8 , NA,NA,NA,NA, ptr.ix) }; } + I32 Builder::load16(Ptr ptr) { return {this, push(Op::load16, NA,NA,NA,NA, ptr.ix) }; } + I32 Builder::load32(Ptr ptr) { return {this, push(Op::load32, NA,NA,NA,NA, ptr.ix) }; } + I32 Builder::load64(Ptr ptr, int lane) { + return {this, push(Op::load64 , NA,NA,NA,NA, ptr.ix,lane) }; + } + I32 Builder::load128(Ptr ptr, int lane) { + return {this, push(Op::load128, NA,NA,NA,NA, ptr.ix,lane) }; + } + + I32 Builder::gather8 (UPtr ptr, int offset, I32 index) { + return {this, push(Op::gather8 , index.id,NA,NA,NA, ptr.ix,offset)}; + } + I32 Builder::gather16(UPtr ptr, int offset, I32 index) { + return {this, push(Op::gather16, index.id,NA,NA,NA, ptr.ix,offset)}; + } + I32 Builder::gather32(UPtr ptr, int offset, I32 index) { + return {this, push(Op::gather32, index.id,NA,NA,NA, ptr.ix,offset)}; + } + + I32 Builder::uniform32(UPtr ptr, int offset) { + return {this, push(Op::uniform32, NA,NA,NA,NA, ptr.ix, offset)}; + } + + // Note: this converts the array index into a byte offset for the op. + I32 Builder::array32 (UPtr ptr, int offset, int index) { + return {this, push(Op::array32, NA,NA,NA,NA, ptr.ix, offset, index * sizeof(int))}; + } + + I32 Builder::splat(int n) { return {this, push(Op::splat, NA,NA,NA,NA, n) }; } + + template + void Builder::canonicalizeIdOrder(F32_or_I32& x, F32_or_I32& y) { + bool immX = fProgram[x.id].op == Op::splat; + bool immY = fProgram[y.id].op == Op::splat; + if (immX != immY) { + if (immX) { + // Prefer (val, imm) over (imm, val). + std::swap(x, y); + } + return; + } + if (x.id > y.id) { + // Prefer (lower-ID, higher-ID) over (higher-ID, lower-ID). + std::swap(x, y); + } + } + + // Be careful peepholing float math! Transformations you might expect to + // be legal can fail in the face of NaN/Inf, e.g. 0*x is not always 0. + // Float peepholes must pass this equivalence test for all ~4B floats: + // + // bool equiv(float x, float y) { return (x == y) || (isnanf(x) && isnanf(y)); } + // + // unsigned bits = 0; + // do { + // float f; + // memcpy(&f, &bits, 4); + // if (!equiv(f, ...)) { + // abort(); + // } + // } while (++bits != 0); + + F32 Builder::add(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X+Y); } + this->canonicalizeIdOrder(x, y); + if (this->isImm(y.id, 0.0f)) { return x; } // x+0 == x + + if (fFeatures.fma) { + if (fProgram[x.id].op == Op::mul_f32) { + return {this, this->push(Op::fma_f32, fProgram[x.id].x, fProgram[x.id].y, y.id)}; + } + if (fProgram[y.id].op == Op::mul_f32) { + return {this, this->push(Op::fma_f32, fProgram[y.id].x, fProgram[y.id].y, x.id)}; + } + } + return {this, this->push(Op::add_f32, x.id, y.id)}; + } + + F32 Builder::sub(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X-Y); } + if (this->isImm(y.id, 0.0f)) { return x; } // x-0 == x + if (fFeatures.fma) { + if (fProgram[x.id].op == Op::mul_f32) { + return {this, this->push(Op::fms_f32, fProgram[x.id].x, fProgram[x.id].y, y.id)}; + } + if (fProgram[y.id].op == Op::mul_f32) { + return {this, this->push(Op::fnma_f32, fProgram[y.id].x, fProgram[y.id].y, x.id)}; + } + } + return {this, this->push(Op::sub_f32, x.id, y.id)}; + } + + F32 Builder::mul(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X*Y); } + this->canonicalizeIdOrder(x, y); + if (this->isImm(y.id, 1.0f)) { return x; } // x*1 == x + return {this, this->push(Op::mul_f32, x.id, y.id)}; + } + + F32 Builder::fast_mul(F32 x, F32 y) { + if (this->isImm(x.id, 0.0f) || this->isImm(y.id, 0.0f)) { return splat(0.0f); } + return mul(x,y); + } + + F32 Builder::div(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(sk_ieee_float_divide(X,Y)); } + if (this->isImm(y.id, 1.0f)) { return x; } // x/1 == x + return {this, this->push(Op::div_f32, x.id, y.id)}; + } + + F32 Builder::sqrt(F32 x) { + if (float X; this->allImm(x.id,&X)) { return splat(std::sqrt(X)); } + return {this, this->push(Op::sqrt_f32, x.id)}; + } + + // See http://www.machinedlearnings.com/2011/06/fast-approximate-logarithm-exponential.html. + F32 Builder::approx_log2(F32 x) { + // e - 127 is a fair approximation of log2(x) in its own right... + F32 e = mul(to_F32(pun_to_I32(x)), splat(1.0f / (1<<23))); + + // ... but using the mantissa to refine its error is _much_ better. + F32 m = pun_to_F32(bit_or(bit_and(pun_to_I32(x), 0x007fffff), + 0x3f000000)); + F32 approx = sub(e, 124.225514990f); + approx = sub(approx, mul(1.498030302f, m)); + approx = sub(approx, div(1.725879990f, add(0.3520887068f, m))); + + return approx; + } + + F32 Builder::approx_pow2(F32 x) { + constexpr float kInfinityBits = 0x7f800000; + + F32 f = fract(x); + F32 approx = add(x, 121.274057500f); + approx = sub(approx, mul( 1.490129070f, f)); + approx = add(approx, div(27.728023300f, sub(4.84252568f, f))); + approx = mul(1.0f * (1<<23), approx); + approx = clamp(approx, 0, kInfinityBits); // guard against underflow/overflow + + return pun_to_F32(round(approx)); + } + + F32 Builder::approx_powf(F32 x, F32 y) { + // TODO: assert this instead? Sometimes x is very slightly negative. See skia:10210. + x = max(0.0f, x); + + if (this->isImm(x.id, 1.0f)) { return x; } // 1^y is one + if (this->isImm(x.id, 2.0f)) { return this->approx_pow2(y); } // 2^y is pow2(y) + if (this->isImm(y.id, 0.5f)) { return this->sqrt(x); } // x^0.5 is sqrt(x) + if (this->isImm(y.id, 1.0f)) { return x; } // x^1 is x + if (this->isImm(y.id, 2.0f)) { return x * x; } // x^2 is x*x + + auto is_x = bit_or(eq(x, 0.0f), + eq(x, 1.0f)); + return select(is_x, x, approx_pow2(mul(approx_log2(x), y))); + } + + // Bhaskara I's sine approximation + // 16x(pi - x) / (5*pi^2 - 4x(pi - x) + // ... divide by 4 + // 4x(pi - x) / 5*pi^2/4 - x(pi - x) + // + // This is a good approximation only for 0 <= x <= pi, so we use symmetries to get + // radians into that range first. + // + F32 Builder::approx_sin(F32 radians) { + constexpr float Pi = SK_ScalarPI; + // x = radians mod 2pi + F32 x = fract(radians * (0.5f/Pi)) * (2*Pi); + I32 neg = x > Pi; // are we pi < x < 2pi --> need to negate result + x = select(neg, x - Pi, x); + + F32 pair = x * (Pi - x); + x = 4.0f * pair / ((5*Pi*Pi/4) - pair); + x = select(neg, -x, x); + return x; + } + + /* "GENERATING ACCURATE VALUES FOR THE TANGENT FUNCTION" + https://mae.ufl.edu/~uhk/ACCURATE-TANGENT.pdf + + approx = x + (1/3)x^3 + (2/15)x^5 + (17/315)x^7 + (62/2835)x^9 + + Some simplifications: + 1. tan(x) is periodic, -PI/2 < x < PI/2 + 2. tan(x) is odd, so tan(-x) = -tan(x) + 3. Our polynomial approximation is best near zero, so we use the following identity + tan(x) + tan(y) + tan(x + y) = ----------------- + 1 - tan(x)*tan(y) + tan(PI/4) = 1 + + So for x > PI/8, we do the following refactor: + x' = x - PI/4 + + 1 + tan(x') + tan(x) = ------------ + 1 - tan(x') + */ + F32 Builder::approx_tan(F32 x) { + constexpr float Pi = SK_ScalarPI; + // periodic between -pi/2 ... pi/2 + // shift to 0...Pi, scale 1/Pi to get into 0...1, then fract, scale-up, shift-back + x = fract((1/Pi)*x + 0.5f) * Pi - (Pi/2); + + I32 neg = (x < 0.0f); + x = select(neg, -x, x); + + // minimize total error by shifting if x > pi/8 + I32 use_quotient = (x > (Pi/8)); + x = select(use_quotient, x - (Pi/4), x); + + // 9th order poly = 4th order(x^2) * x + x = poly(x*x, 62/2835.0f, 17/315.0f, 2/15.0f, 1/3.0f, 1.0f) * x; + x = select(use_quotient, (1+x)/(1-x), x); + x = select(neg, -x, x); + return x; + } + + // http://mathforum.org/library/drmath/view/54137.html + // referencing Handbook of Mathematical Functions, + // by Milton Abramowitz and Irene Stegun + F32 Builder::approx_asin(F32 x) { + I32 neg = (x < 0.0f); + x = select(neg, -x, x); + x = SK_ScalarPI/2 - sqrt(1-x) * poly(x, -0.0187293f, 0.0742610f, -0.2121144f, 1.5707288f); + x = select(neg, -x, x); + return x; + } + + /* Use 4th order polynomial approximation from https://arachnoid.com/polysolve/ + * with 129 values of x,atan(x) for x:[0...1] + * This only works for 0 <= x <= 1 + */ + static F32 approx_atan_unit(F32 x) { + // for now we might be given NaN... let that through + x->assert_true((x != x) | ((x >= 0) & (x <= 1))); + return poly(x, 0.14130025741326729f, + -0.34312835980675116f, + -0.016172900528248768f, + 1.0037696976200385f, + -0.00014758242182738969f); + } + + /* Use identity atan(x) = pi/2 - atan(1/x) for x > 1 + */ + F32 Builder::approx_atan(F32 x) { + I32 neg = (x < 0.0f); + x = select(neg, -x, x); + I32 flip = (x > 1.0f); + x = select(flip, 1/x, x); + x = approx_atan_unit(x); + x = select(flip, SK_ScalarPI/2 - x, x); + x = select(neg, -x, x); + return x; + } + + /* Use identity atan(x) = pi/2 - atan(1/x) for x > 1 + * By swapping y,x to ensure the ratio is <= 1, we can safely call atan_unit() + * which avoids a 2nd divide instruction if we had instead called atan(). + */ + F32 Builder::approx_atan2(F32 y0, F32 x0) { + + I32 flip = (abs(y0) > abs(x0)); + F32 y = select(flip, x0, y0); + F32 x = select(flip, y0, x0); + F32 arg = y/x; + + I32 neg = (arg < 0.0f); + arg = select(neg, -arg, arg); + + F32 r = approx_atan_unit(arg); + r = select(flip, SK_ScalarPI/2 - r, r); + r = select(neg, -r, r); + + // handle quadrant distinctions + r = select((y0 >= 0) & (x0 < 0), r + SK_ScalarPI, r); + r = select((y0 < 0) & (x0 <= 0), r - SK_ScalarPI, r); + // Note: we don't try to handle 0,0 or infinities + return r; + } + + F32 Builder::min(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(std::min(X,Y)); } + return {this, this->push(Op::min_f32, x.id, y.id)}; + } + F32 Builder::max(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(std::max(X,Y)); } + return {this, this->push(Op::max_f32, x.id, y.id)}; + } + + SK_NO_SANITIZE("signed-integer-overflow") + I32 Builder::add(I32 x, I32 y) { + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X+Y); } + this->canonicalizeIdOrder(x, y); + if (this->isImm(y.id, 0)) { return x; } // x+0 == x + return {this, this->push(Op::add_i32, x.id, y.id)}; + } + SK_NO_SANITIZE("signed-integer-overflow") + I32 Builder::sub(I32 x, I32 y) { + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X-Y); } + if (this->isImm(y.id, 0)) { return x; } + return {this, this->push(Op::sub_i32, x.id, y.id)}; + } + SK_NO_SANITIZE("signed-integer-overflow") + I32 Builder::mul(I32 x, I32 y) { + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X*Y); } + this->canonicalizeIdOrder(x, y); + if (this->isImm(y.id, 0)) { return splat(0); } // x*0 == 0 + if (this->isImm(y.id, 1)) { return x; } // x*1 == x + return {this, this->push(Op::mul_i32, x.id, y.id)}; + } + + SK_NO_SANITIZE("shift") + I32 Builder::shl(I32 x, int bits) { + if (bits == 0) { return x; } + if (int X; this->allImm(x.id,&X)) { return splat(X << bits); } + return {this, this->push(Op::shl_i32, x.id,NA,NA,NA, bits)}; + } + I32 Builder::shr(I32 x, int bits) { + if (bits == 0) { return x; } + if (int X; this->allImm(x.id,&X)) { return splat(unsigned(X) >> bits); } + return {this, this->push(Op::shr_i32, x.id,NA,NA,NA, bits)}; + } + I32 Builder::sra(I32 x, int bits) { + if (bits == 0) { return x; } + if (int X; this->allImm(x.id,&X)) { return splat(X >> bits); } + return {this, this->push(Op::sra_i32, x.id,NA,NA,NA, bits)}; + } + + I32 Builder:: eq(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X==Y ? ~0 : 0); } + this->canonicalizeIdOrder(x, y); + return {this, this->push(Op::eq_f32, x.id, y.id)}; + } + I32 Builder::neq(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X!=Y ? ~0 : 0); } + this->canonicalizeIdOrder(x, y); + return {this, this->push(Op::neq_f32, x.id, y.id)}; + } + I32 Builder::lt(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(Y> X ? ~0 : 0); } + return {this, this->push(Op::gt_f32, y.id, x.id)}; + } + I32 Builder::lte(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(Y>=X ? ~0 : 0); } + return {this, this->push(Op::gte_f32, y.id, x.id)}; + } + I32 Builder::gt(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X> Y ? ~0 : 0); } + return {this, this->push(Op::gt_f32, x.id, y.id)}; + } + I32 Builder::gte(F32 x, F32 y) { + if (float X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X>=Y ? ~0 : 0); } + return {this, this->push(Op::gte_f32, x.id, y.id)}; + } + + I32 Builder:: eq(I32 x, I32 y) { + if (x.id == y.id) { return splat(~0); } + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X==Y ? ~0 : 0); } + this->canonicalizeIdOrder(x, y); + return {this, this->push(Op:: eq_i32, x.id, y.id)}; + } + I32 Builder::neq(I32 x, I32 y) { + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X!=Y ? ~0 : 0); } + return ~(x == y); + } + I32 Builder:: gt(I32 x, I32 y) { + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X> Y ? ~0 : 0); } + return {this, this->push(Op:: gt_i32, x.id, y.id)}; + } + I32 Builder::gte(I32 x, I32 y) { + if (x.id == y.id) { return splat(~0); } + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X>=Y ? ~0 : 0); } + return ~(x < y); + } + I32 Builder:: lt(I32 x, I32 y) { return y>x; } + I32 Builder::lte(I32 x, I32 y) { return y>=x; } + + Val Builder::holdsBitNot(Val id) { + // We represent `~x` as `x ^ ~0`. + if (fProgram[id].op == Op::bit_xor && this->isImm(fProgram[id].y, ~0)) { + return fProgram[id].x; + } + return NA; + } + + I32 Builder::bit_and(I32 x, I32 y) { + if (x.id == y.id) { return x; } + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X&Y); } + this->canonicalizeIdOrder(x, y); + if (this->isImm(y.id, 0)) { return splat(0); } // (x & false) == false + if (this->isImm(y.id,~0)) { return x; } // (x & true) == x + if (Val notX = this->holdsBitNot(x.id); notX != NA) { // (~x & y) == bit_clear(y, ~x) + return bit_clear(y, {this, notX}); + } + if (Val notY = this->holdsBitNot(y.id); notY != NA) { // (x & ~y) == bit_clear(x, ~y) + return bit_clear(x, {this, notY}); + } + return {this, this->push(Op::bit_and, x.id, y.id)}; + } + I32 Builder::bit_or(I32 x, I32 y) { + if (x.id == y.id) { return x; } + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X|Y); } + this->canonicalizeIdOrder(x, y); + if (this->isImm(y.id, 0)) { return x; } // (x | false) == x + if (this->isImm(y.id,~0)) { return splat(~0); } // (x | true) == true + return {this, this->push(Op::bit_or, x.id, y.id)}; + } + I32 Builder::bit_xor(I32 x, I32 y) { + if (x.id == y.id) { return splat(0); } + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X^Y); } + this->canonicalizeIdOrder(x, y); + if (this->isImm(y.id, 0)) { return x; } // (x ^ false) == x + return {this, this->push(Op::bit_xor, x.id, y.id)}; + } + + I32 Builder::bit_clear(I32 x, I32 y) { + if (x.id == y.id) { return splat(0); } + if (int X,Y; this->allImm(x.id,&X, y.id,&Y)) { return splat(X&~Y); } + if (this->isImm(y.id, 0)) { return x; } // (x & ~false) == x + if (this->isImm(y.id,~0)) { return splat(0); } // (x & ~true) == false + if (this->isImm(x.id, 0)) { return splat(0); } // (false & ~y) == false + return {this, this->push(Op::bit_clear, x.id, y.id)}; + } + + I32 Builder::select(I32 x, I32 y, I32 z) { + if (y.id == z.id) { return y; } + if (int X,Y,Z; this->allImm(x.id,&X, y.id,&Y, z.id,&Z)) { return splat(X?Y:Z); } + if (this->isImm(x.id,~0)) { return y; } // (true ? y : z) == y + if (this->isImm(x.id, 0)) { return z; } // (false ? y : z) == z + if (this->isImm(y.id, 0)) { return bit_clear(z,x); } // (x ? 0 : z) == ~x&z + if (this->isImm(z.id, 0)) { return bit_and (y,x); } // (x ? y : 0) == x&y + if (Val notX = this->holdsBitNot(x.id); notX != NA) { // (!x ? y : z) == (x ? z : y) + x.id = notX; + std::swap(y, z); + } + return {this, this->push(Op::select, x.id, y.id, z.id)}; + } + + I32 Builder::extract(I32 x, int bits, I32 z) { + if (unsigned Z; this->allImm(z.id,&Z) && (~0u>>bits) == Z) { return shr(x, bits); } + return bit_and(z, shr(x, bits)); + } + + I32 Builder::pack(I32 x, I32 y, int bits) { + return bit_or(x, shl(y, bits)); + } + + F32 Builder::ceil(F32 x) { + if (float X; this->allImm(x.id,&X)) { return splat(ceilf(X)); } + return {this, this->push(Op::ceil, x.id)}; + } + F32 Builder::floor(F32 x) { + if (float X; this->allImm(x.id,&X)) { return splat(floorf(X)); } + return {this, this->push(Op::floor, x.id)}; + } + F32 Builder::to_F32(I32 x) { + if (int X; this->allImm(x.id,&X)) { return splat((float)X); } + return {this, this->push(Op::to_f32, x.id)}; + } + I32 Builder::trunc(F32 x) { + if (float X; this->allImm(x.id,&X)) { return splat((int)X); } + return {this, this->push(Op::trunc, x.id)}; + } + I32 Builder::round(F32 x) { + if (float X; this->allImm(x.id,&X)) { return splat((int)lrintf(X)); } + return {this, this->push(Op::round, x.id)}; + } + + I32 Builder::to_fp16(F32 x) { + if (float X; this->allImm(x.id,&X)) { return splat((int)SkFloatToHalf(X)); } + return {this, this->push(Op::to_fp16, x.id)}; + } + F32 Builder::from_fp16(I32 x) { + if (int X; this->allImm(x.id,&X)) { return splat(SkHalfToFloat(X)); } + return {this, this->push(Op::from_fp16, x.id)}; + } + + F32 Builder::from_unorm(int bits, I32 x) { + F32 limit = splat(1 / ((1< F32 { + const skcms_TransferFunction* tf = skcms_sRGB_TransferFunction(); + F32 v = from_unorm(bits, channel); + return sk_program_transfer_fn(v, skcms_TFType_sRGBish, + v->splat(tf->g), + v->splat(tf->a), + v->splat(tf->b), + v->splat(tf->c), + v->splat(tf->d), + v->splat(tf->e), + v->splat(tf->f)); + }; + auto from_xr = [](int bits, I32 channel) -> F32 { + static constexpr float min = -0.752941f; + static constexpr float max = 1.25098f; + static constexpr float range = max - min; + F32 v = from_unorm(bits, channel); + return v * range + min; + }; + + auto unpack_rgb = [=](int bits, int shift) -> F32 { + I32 channel = extract(x, shift, (1< F32 { + I32 channel = extract(x, shift, (1<splat(0.0f), + f.g_bits ? unpack_rgb (f.g_bits, f.g_shift) : x->splat(0.0f), + f.b_bits ? unpack_rgb (f.b_bits, f.b_shift) : x->splat(0.0f), + f.a_bits ? unpack_alpha(f.a_bits, f.a_shift) : x->splat(1.0f), + }; + } + + static void split_disjoint_8byte_format(PixelFormat f, PixelFormat* lo, PixelFormat* hi) { + SkASSERT(byte_size(f) == 8); + // We assume some of the channels are in the low 32 bits, some in the high 32 bits. + // The assert on byte_size(lo) will trigger if this assumption is violated. + *lo = f; + if (f.r_shift >= 32) { lo->r_bits = 0; lo->r_shift = 32; } + if (f.g_shift >= 32) { lo->g_bits = 0; lo->g_shift = 32; } + if (f.b_shift >= 32) { lo->b_bits = 0; lo->b_shift = 32; } + if (f.a_shift >= 32) { lo->a_bits = 0; lo->a_shift = 32; } + SkASSERT(byte_size(*lo) == 4); + + *hi = f; + if (f.r_shift < 32) { hi->r_bits = 0; hi->r_shift = 32; } else { hi->r_shift -= 32; } + if (f.g_shift < 32) { hi->g_bits = 0; hi->g_shift = 32; } else { hi->g_shift -= 32; } + if (f.b_shift < 32) { hi->b_bits = 0; hi->b_shift = 32; } else { hi->b_shift -= 32; } + if (f.a_shift < 32) { hi->a_bits = 0; hi->a_shift = 32; } else { hi->a_shift -= 32; } + SkASSERT(byte_size(*hi) == 4); + } + + // The only 16-byte format we support today is RGBA F32, + // though, TODO, we could generalize that to any swizzle, and to allow UNORM too. + static void assert_16byte_is_rgba_f32(PixelFormat f) { + #if defined(SK_DEBUG) + SkASSERT(byte_size(f) == 16); + PixelFormat rgba_f32 = SkColorType_to_PixelFormat(kRGBA_F32_SkColorType); + + SkASSERT(f.encoding == rgba_f32.encoding); + + SkASSERT(f.r_bits == rgba_f32.r_bits); + SkASSERT(f.g_bits == rgba_f32.g_bits); + SkASSERT(f.b_bits == rgba_f32.b_bits); + SkASSERT(f.a_bits == rgba_f32.a_bits); + + SkASSERT(f.r_shift == rgba_f32.r_shift); + SkASSERT(f.g_shift == rgba_f32.g_shift); + SkASSERT(f.b_shift == rgba_f32.b_shift); + SkASSERT(f.a_shift == rgba_f32.a_shift); + #endif + } + + Color Builder::load(PixelFormat f, Ptr ptr) { + switch (byte_size(f)) { + case 1: return unpack(f, load8 (ptr)); + case 2: return unpack(f, load16(ptr)); + case 4: return unpack(f, load32(ptr)); + case 8: { + PixelFormat lo,hi; + split_disjoint_8byte_format(f, &lo,&hi); + Color l = unpack(lo, load64(ptr, 0)), + h = unpack(hi, load64(ptr, 1)); + return { + lo.r_bits ? l.r : h.r, + lo.g_bits ? l.g : h.g, + lo.b_bits ? l.b : h.b, + lo.a_bits ? l.a : h.a, + }; + } + case 16: { + assert_16byte_is_rgba_f32(f); + return { + pun_to_F32(load128(ptr, 0)), + pun_to_F32(load128(ptr, 1)), + pun_to_F32(load128(ptr, 2)), + pun_to_F32(load128(ptr, 3)), + }; + } + default: SkUNREACHABLE; + } + } + + Color Builder::gather(PixelFormat f, UPtr ptr, int offset, I32 index) { + switch (byte_size(f)) { + case 1: return unpack(f, gather8 (ptr, offset, index)); + case 2: return unpack(f, gather16(ptr, offset, index)); + case 4: return unpack(f, gather32(ptr, offset, index)); + case 8: { + PixelFormat lo,hi; + split_disjoint_8byte_format(f, &lo,&hi); + Color l = unpack(lo, gather32(ptr, offset, (index<<1)+0)), + h = unpack(hi, gather32(ptr, offset, (index<<1)+1)); + return { + lo.r_bits ? l.r : h.r, + lo.g_bits ? l.g : h.g, + lo.b_bits ? l.b : h.b, + lo.a_bits ? l.a : h.a, + }; + } + case 16: { + assert_16byte_is_rgba_f32(f); + return { + gatherF(ptr, offset, (index<<2)+0), + gatherF(ptr, offset, (index<<2)+1), + gatherF(ptr, offset, (index<<2)+2), + gatherF(ptr, offset, (index<<2)+3), + }; + } + default: SkUNREACHABLE; + } + } + + static I32 pack32(PixelFormat f, Color c) { + SkASSERT(byte_size(f) <= 4); + + auto to_srgb = [](int bits, F32 v) { + const skcms_TransferFunction* tf = skcms_sRGB_Inverse_TransferFunction(); + return to_unorm(bits, sk_program_transfer_fn(v, skcms_TFType_sRGBish, + v->splat(tf->g), + v->splat(tf->a), + v->splat(tf->b), + v->splat(tf->c), + v->splat(tf->d), + v->splat(tf->e), + v->splat(tf->f))); + }; + auto to_xr = [](int bits, F32 v) { + static constexpr float min = -0.752941f; + static constexpr float max = 1.25098f; + static constexpr float range = max - min; + return to_unorm(bits, (v - min) * (1.0f / range)); + }; + + I32 packed = c->splat(0); + auto pack_rgb = [&](F32 channel, int bits, int shift) { + I32 encoded; + switch (f.encoding) { + case PixelFormat::UNORM: encoded = to_unorm(bits, channel); break; + case PixelFormat:: SRGB: encoded = to_srgb (bits, channel); break; + case PixelFormat::FLOAT: encoded = to_fp16 ( channel); break; + case PixelFormat:: XRNG: encoded = to_xr (bits, channel); break; + } + packed = pack(packed, encoded, shift); + }; + auto pack_alpha = [&](F32 channel, int bits, int shift) { + I32 encoded; + switch (f.encoding) { + case PixelFormat::UNORM: + case PixelFormat:: SRGB: encoded = to_unorm(bits, channel); break; + case PixelFormat::FLOAT: encoded = to_fp16 ( channel); break; + case PixelFormat:: XRNG: encoded = to_xr (bits, channel); break; + } + packed = pack(packed, encoded, shift); + }; + if (f.r_bits) { pack_rgb (c.r, f.r_bits, f.r_shift); } + if (f.g_bits) { pack_rgb (c.g, f.g_bits, f.g_shift); } + if (f.b_bits) { pack_rgb (c.b, f.b_bits, f.b_shift); } + if (f.a_bits) { pack_alpha(c.a, f.a_bits, f.a_shift); } + return packed; + } + + void Builder::store(PixelFormat f, Ptr ptr, Color c) { + // Detect a grayscale PixelFormat: r,g,b bit counts and shifts all equal. + if (f.r_bits == f.g_bits && f.g_bits == f.b_bits && + f.r_shift == f.g_shift && f.g_shift == f.b_shift) { + + // TODO: pull these coefficients from an SkColorSpace? This is sRGB luma/luminance. + c.r = c.r * 0.2126f + + c.g * 0.7152f + + c.b * 0.0722f; + f.g_bits = f.b_bits = 0; + } + + switch (byte_size(f)) { + case 1: store8 (ptr, pack32(f,c)); break; + case 2: store16(ptr, pack32(f,c)); break; + case 4: store32(ptr, pack32(f,c)); break; + case 8: { + PixelFormat lo,hi; + split_disjoint_8byte_format(f, &lo,&hi); + store64(ptr, pack32(lo,c) + , pack32(hi,c)); + break; + } + case 16: { + assert_16byte_is_rgba_f32(f); + store128(ptr, pun_to_I32(c.r), pun_to_I32(c.g), pun_to_I32(c.b), pun_to_I32(c.a)); + break; + } + default: SkUNREACHABLE; + } + } + + void Builder::unpremul(F32* r, F32* g, F32* b, F32 a) { + skvm::F32 invA = 1.0f / a, + inf = pun_to_F32(splat(0x7f800000)); + // If a is 0, so are *r,*g,*b, so set invA to 0 to avoid 0*inf=NaN (instead 0*0 = 0). + invA = select(invA < inf, invA + , 0.0f); + *r *= invA; + *g *= invA; + *b *= invA; + } + + void Builder::premul(F32* r, F32* g, F32* b, F32 a) { + *r *= a; + *g *= a; + *b *= a; + } + + Color Builder::uniformColor(SkColor4f color, Uniforms* uniforms) { + auto [r,g,b,a] = color; + return { + uniformF(uniforms->pushF(r)), + uniformF(uniforms->pushF(g)), + uniformF(uniforms->pushF(b)), + uniformF(uniforms->pushF(a)), + }; + } + + F32 Builder::lerp(F32 lo, F32 hi, F32 t) { + if (this->isImm(t.id, 0.0f)) { return lo; } + if (this->isImm(t.id, 1.0f)) { return hi; } + return mad(sub(hi, lo), t, lo); + } + + Color Builder::lerp(Color lo, Color hi, F32 t) { + return { + lerp(lo.r, hi.r, t), + lerp(lo.g, hi.g, t), + lerp(lo.b, hi.b, t), + lerp(lo.a, hi.a, t), + }; + } + + HSLA Builder::to_hsla(Color c) { + F32 mx = max(max(c.r,c.g),c.b), + mn = min(min(c.r,c.g),c.b), + d = mx - mn, + invd = 1.0f / d, + g_lt_b = select(c.g < c.b, splat(6.0f) + , splat(0.0f)); + + F32 h = (1/6.0f) * select(mx == mn, 0.0f, + select(mx == c.r, invd * (c.g - c.b) + g_lt_b, + select(mx == c.g, invd * (c.b - c.r) + 2.0f + , invd * (c.r - c.g) + 4.0f))); + + F32 sum = mx + mn, + l = sum * 0.5f, + s = select(mx == mn, 0.0f + , d / select(l > 0.5f, 2.0f - sum + , sum)); + return {h, s, l, c.a}; + } + + Color Builder::to_rgba(HSLA c) { + // See GrRGBToHSLFilterEffect.fp + + auto [h,s,l,a] = c; + F32 x = s * (1.0f - abs(l + l - 1.0f)); + + auto hue_to_rgb = [&,l=l](auto hue) { + auto q = abs(6.0f * fract(hue) - 3.0f) - 1.0f; + return x * (clamp01(q) - 0.5f) + l; + }; + + return { + hue_to_rgb(h + 0/3.0f), + hue_to_rgb(h + 2/3.0f), + hue_to_rgb(h + 1/3.0f), + c.a, + }; + } + + // We're basing our implementation of non-separable blend modes on + // https://www.w3.org/TR/compositing-1/#blendingnonseparable. + // and + // https://www.khronos.org/registry/OpenGL/specs/es/3.2/es_spec_3.2.pdf + // They're equivalent, but ES' math has been better simplified. + // + // Anything extra we add beyond that is to make the math work with premul inputs. + + static skvm::F32 saturation(skvm::F32 r, skvm::F32 g, skvm::F32 b) { + return max(r, max(g, b)) + - min(r, min(g, b)); + } + + static skvm::F32 luminance(skvm::F32 r, skvm::F32 g, skvm::F32 b) { + return r*0.30f + g*0.59f + b*0.11f; + } + + static void set_sat(skvm::F32* r, skvm::F32* g, skvm::F32* b, skvm::F32 s) { + F32 mn = min(*r, min(*g, *b)), + mx = max(*r, max(*g, *b)), + sat = mx - mn; + + // Map min channel to 0, max channel to s, and scale the middle proportionally. + auto scale = [&](skvm::F32 c) { + auto scaled = ((c - mn) * s) / sat; + return select(is_finite(scaled), scaled, 0.0f); + }; + *r = scale(*r); + *g = scale(*g); + *b = scale(*b); + } + + static void set_lum(skvm::F32* r, skvm::F32* g, skvm::F32* b, skvm::F32 lu) { + auto diff = lu - luminance(*r, *g, *b); + *r += diff; + *g += diff; + *b += diff; + } + + static void clip_color(skvm::F32* r, skvm::F32* g, skvm::F32* b, skvm::F32 a) { + F32 mn = min(*r, min(*g, *b)), + mx = max(*r, max(*g, *b)), + lu = luminance(*r, *g, *b); + + auto clip = [&](auto c) { + c = select(mn < 0 & lu != mn, lu + ((c-lu)*( lu)) / (lu-mn), c); + c = select(mx > a & lu != mx, lu + ((c-lu)*(a-lu)) / (mx-lu), c); + return clamp01(c); // May be a little negative, or worse, NaN. + }; + *r = clip(*r); + *g = clip(*g); + *b = clip(*b); + } + + Color Builder::blend(SkBlendMode mode, Color src, Color dst) { + auto mma = [](skvm::F32 x, skvm::F32 y, skvm::F32 z, skvm::F32 w) { + return x*y + z*w; + }; + + auto two = [](skvm::F32 x) { return x+x; }; + + auto apply_rgba = [&](auto fn) { + return Color { + fn(src.r, dst.r), + fn(src.g, dst.g), + fn(src.b, dst.b), + fn(src.a, dst.a), + }; + }; + + auto apply_rgb_srcover_a = [&](auto fn) { + return Color { + fn(src.r, dst.r), + fn(src.g, dst.g), + fn(src.b, dst.b), + mad(dst.a, 1-src.a, src.a), // srcover for alpha + }; + }; + + auto non_sep = [&](auto R, auto G, auto B) { + return Color{ + R + mma(src.r, 1-dst.a, dst.r, 1-src.a), + G + mma(src.g, 1-dst.a, dst.g, 1-src.a), + B + mma(src.b, 1-dst.a, dst.b, 1-src.a), + mad(dst.a, 1-src.a, src.a), // srcover for alpha + }; + }; + + switch (mode) { + default: + SkASSERT(false); + [[fallthrough]]; /*but also, for safety, fallthrough*/ + + case SkBlendMode::kClear: return { splat(0.0f), splat(0.0f), splat(0.0f), splat(0.0f) }; + + case SkBlendMode::kSrc: return src; + case SkBlendMode::kDst: return dst; + + case SkBlendMode::kDstOver: std::swap(src, dst); [[fallthrough]]; + case SkBlendMode::kSrcOver: + return apply_rgba([&](auto s, auto d) { + return mad(d,1-src.a, s); + }); + + case SkBlendMode::kDstIn: std::swap(src, dst); [[fallthrough]]; + case SkBlendMode::kSrcIn: + return apply_rgba([&](auto s, auto d) { + return s * dst.a; + }); + + case SkBlendMode::kDstOut: std::swap(src, dst); [[fallthrough]]; + + case SkBlendMode::kSrcOut: + return apply_rgba([&](auto s, auto d) { + return s * (1-dst.a); + }); + + case SkBlendMode::kDstATop: std::swap(src, dst); [[fallthrough]]; + case SkBlendMode::kSrcATop: + return apply_rgba([&](auto s, auto d) { + return mma(s, dst.a, d, 1-src.a); + }); + + case SkBlendMode::kXor: + return apply_rgba([&](auto s, auto d) { + return mma(s, 1-dst.a, d, 1-src.a); + }); + + case SkBlendMode::kPlus: + return apply_rgba([&](auto s, auto d) { + return min(s+d, 1.0f); + }); + + case SkBlendMode::kModulate: + return apply_rgba([&](auto s, auto d) { + return s * d; + }); + + case SkBlendMode::kScreen: + // (s+d)-(s*d) gave us trouble with our "r,g,b <= after blending" asserts. + // It's kind of plausible that s + (d - sd) keeps more precision? + return apply_rgba([&](auto s, auto d) { + return s + (d - s*d); + }); + + case SkBlendMode::kDarken: + return apply_rgb_srcover_a([&](auto s, auto d) { + return s + (d - max(s * dst.a, + d * src.a)); + }); + + case SkBlendMode::kLighten: + return apply_rgb_srcover_a([&](auto s, auto d) { + return s + (d - min(s * dst.a, + d * src.a)); + }); + + case SkBlendMode::kDifference: + return apply_rgb_srcover_a([&](auto s, auto d) { + return s + (d - two(min(s * dst.a, + d * src.a))); + }); + + case SkBlendMode::kExclusion: + return apply_rgb_srcover_a([&](auto s, auto d) { + return s + (d - two(s * d)); + }); + + case SkBlendMode::kColorBurn: + return apply_rgb_srcover_a([&](auto s, auto d) { + auto mn = min(dst.a, + src.a * (dst.a - d) / s), + burn = src.a * (dst.a - mn) + mma(s, 1-dst.a, d, 1-src.a); + return select(d == dst.a , s * (1-dst.a) + d, + select(is_finite(burn), burn + , d * (1-src.a) + s)); + }); + + case SkBlendMode::kColorDodge: + return apply_rgb_srcover_a([&](auto s, auto d) { + auto dodge = src.a * min(dst.a, + d * src.a / (src.a - s)) + + mma(s, 1-dst.a, d, 1-src.a); + return select(d == 0.0f , s * (1-dst.a) + d, + select(is_finite(dodge), dodge + , d * (1-src.a) + s)); + }); + + case SkBlendMode::kHardLight: + return apply_rgb_srcover_a([&](auto s, auto d) { + return mma(s, 1-dst.a, d, 1-src.a) + + select(two(s) <= src.a, + two(s * d), + src.a * dst.a - two((dst.a - d) * (src.a - s))); + }); + + case SkBlendMode::kOverlay: + return apply_rgb_srcover_a([&](auto s, auto d) { + return mma(s, 1-dst.a, d, 1-src.a) + + select(two(d) <= dst.a, + two(s * d), + src.a * dst.a - two((dst.a - d) * (src.a - s))); + }); + + case SkBlendMode::kMultiply: + return apply_rgba([&](auto s, auto d) { + return mma(s, 1-dst.a, d, 1-src.a) + s * d; + }); + + case SkBlendMode::kSoftLight: + return apply_rgb_srcover_a([&](auto s, auto d) { + auto m = select(dst.a > 0.0f, d / dst.a + , 0.0f), + s2 = two(s), + m4 = 4*m; + + // The logic forks three ways: + // 1. dark src? + // 2. light src, dark dst? + // 3. light src, light dst? + + // Used in case 1 + auto darkSrc = d * ((s2-src.a) * (1-m) + src.a), + // Used in case 2 + darkDst = (m4 * m4 + m4) * (m-1) + 7*m, + // Used in case 3. + liteDst = sqrt(m) - m, + // Used in 2 or 3? + liteSrc = dst.a * (s2 - src.a) * select(4*d <= dst.a, darkDst + , liteDst) + + d * src.a; + return s * (1-dst.a) + d * (1-src.a) + select(s2 <= src.a, darkSrc + , liteSrc); + }); + + case SkBlendMode::kHue: { + skvm::F32 R = src.r * src.a, + G = src.g * src.a, + B = src.b * src.a; + + set_sat (&R, &G, &B, src.a * saturation(dst.r, dst.g, dst.b)); + set_lum (&R, &G, &B, src.a * luminance (dst.r, dst.g, dst.b)); + clip_color(&R, &G, &B, src.a * dst.a); + + return non_sep(R, G, B); + } + + case SkBlendMode::kSaturation: { + skvm::F32 R = dst.r * src.a, + G = dst.g * src.a, + B = dst.b * src.a; + + set_sat (&R, &G, &B, dst.a * saturation(src.r, src.g, src.b)); + set_lum (&R, &G, &B, src.a * luminance (dst.r, dst.g, dst.b)); + clip_color(&R, &G, &B, src.a * dst.a); + + return non_sep(R, G, B); + } + + case SkBlendMode::kColor: { + skvm::F32 R = src.r * dst.a, + G = src.g * dst.a, + B = src.b * dst.a; + + set_lum (&R, &G, &B, src.a * luminance(dst.r, dst.g, dst.b)); + clip_color(&R, &G, &B, src.a * dst.a); + + return non_sep(R, G, B); + } + + case SkBlendMode::kLuminosity: { + skvm::F32 R = dst.r * src.a, + G = dst.g * src.a, + B = dst.b * src.a; + + set_lum (&R, &G, &B, dst.a * luminance(src.r, src.g, src.b)); + clip_color(&R, &G, &B, dst.a * src.a); + + return non_sep(R, G, B); + } + } + } + + // ~~~~ Program::eval() and co. ~~~~ // + + // Handy references for x86-64 instruction encoding: + // https://wiki.osdev.org/X86-64_Instruction_Encoding + // https://www-user.tu-chemnitz.de/~heha/viewchm.php/hs/x86.chm/x64.htm + // https://www-user.tu-chemnitz.de/~heha/viewchm.php/hs/x86.chm/x86.htm + // http://ref.x86asm.net/coder64.html + + // Used for ModRM / immediate instruction encoding. + static uint8_t _233(int a, int b, int c) { + return (a & 3) << 6 + | (b & 7) << 3 + | (c & 7) << 0; + } + + // ModRM byte encodes the arguments of an opcode. + enum class Mod { Indirect, OneByteImm, FourByteImm, Direct }; + static uint8_t mod_rm(Mod mod, int reg, int rm) { + return _233((int)mod, reg, rm); + } + + static Mod mod(int imm) { + if (imm == 0) { return Mod::Indirect; } + if (SkTFitsIn(imm)) { return Mod::OneByteImm; } + return Mod::FourByteImm; + } + + static int imm_bytes(Mod mod) { + switch (mod) { + case Mod::Indirect: return 0; + case Mod::OneByteImm: return 1; + case Mod::FourByteImm: return 4; + case Mod::Direct: SkUNREACHABLE; + } + SkUNREACHABLE; + } + + // SIB byte encodes a memory address, base + (index * scale). + static uint8_t sib(Assembler::Scale scale, int index, int base) { + return _233((int)scale, index, base); + } + + // The REX prefix is used to extend most old 32-bit instructions to 64-bit. + static uint8_t rex(bool W, // If set, operation is 64-bit, otherwise default, usually 32-bit. + bool R, // Extra top bit to select ModRM reg, registers 8-15. + bool X, // Extra top bit for SIB index register. + bool B) { // Extra top bit for SIB base or ModRM rm register. + return 0b01000000 // Fixed 0100 for top four bits. + | (W << 3) + | (R << 2) + | (X << 1) + | (B << 0); + } + + + // The VEX prefix extends SSE operations to AVX. Used generally, even with XMM. + struct VEX { + int len; + uint8_t bytes[3]; + }; + + static VEX vex(bool WE, // Like REX W for int operations, or opcode extension for float? + bool R, // Same as REX R. Pass high bit of dst register, dst>>3. + bool X, // Same as REX X. + bool B, // Same as REX B. Pass y>>3 for 3-arg ops, x>>3 for 2-arg. + int map, // SSE opcode map selector: 0x0f, 0x380f, 0x3a0f. + int vvvv, // 4-bit second operand register. Pass our x for 3-arg ops. + bool L, // Set for 256-bit ymm operations, off for 128-bit xmm. + int pp) { // SSE mandatory prefix: 0x66, 0xf3, 0xf2, else none. + + // Pack x86 opcode map selector to 5-bit VEX encoding. + map = [map]{ + switch (map) { + case 0x0f: return 0b00001; + case 0x380f: return 0b00010; + case 0x3a0f: return 0b00011; + // Several more cases only used by XOP / TBM. + } + SkUNREACHABLE; + }(); + + // Pack mandatory SSE opcode prefix byte to 2-bit VEX encoding. + pp = [pp]{ + switch (pp) { + case 0x66: return 0b01; + case 0xf3: return 0b10; + case 0xf2: return 0b11; + } + return 0b00; + }(); + + VEX vex = {0, {0,0,0}}; + if (X == 0 && B == 0 && WE == 0 && map == 0b00001) { + // With these conditions met, we can optionally compress VEX to 2-byte. + vex.len = 2; + vex.bytes[0] = 0xc5; + vex.bytes[1] = (pp & 3) << 0 + | (L & 1) << 2 + | (~vvvv & 15) << 3 + | (~(int)R & 1) << 7; + } else { + // We could use this 3-byte VEX prefix all the time if we like. + vex.len = 3; + vex.bytes[0] = 0xc4; + vex.bytes[1] = (map & 31) << 0 + | (~(int)B & 1) << 5 + | (~(int)X & 1) << 6 + | (~(int)R & 1) << 7; + vex.bytes[2] = (pp & 3) << 0 + | (L & 1) << 2 + | (~vvvv & 15) << 3 + | (WE & 1) << 7; + } + return vex; + } + + Assembler::Assembler(void* buf) : fCode((uint8_t*)buf), fSize(0) {} + + size_t Assembler::size() const { return fSize; } + + void Assembler::bytes(const void* p, int n) { + if (fCode) { + memcpy(fCode+fSize, p, n); + } + fSize += n; + } + + void Assembler::byte(uint8_t b) { this->bytes(&b, 1); } + void Assembler::word(uint32_t w) { this->bytes(&w, 4); } + + void Assembler::align(int mod) { + while (this->size() % mod) { + this->byte(0x00); + } + } + + void Assembler::int3() { + this->byte(0xcc); + } + + void Assembler::vzeroupper() { + this->byte(0xc5); + this->byte(0xf8); + this->byte(0x77); + } + void Assembler::ret() { this->byte(0xc3); } + + void Assembler::op(int opcode, Operand dst, GP64 x) { + if (dst.kind == Operand::REG) { + this->byte(rex(W1,x>>3,0,dst.reg>>3)); + this->bytes(&opcode, SkTFitsIn(opcode) ? 1 : 2); + this->byte(mod_rm(Mod::Direct, x, dst.reg&7)); + } else { + SkASSERT(dst.kind == Operand::MEM); + const Mem& m = dst.mem; + const bool need_SIB = (m.base&7) == rsp + || m.index != rsp; + + this->byte(rex(W1,x>>3,m.index>>3,m.base>>3)); + this->bytes(&opcode, SkTFitsIn(opcode) ? 1 : 2); + this->byte(mod_rm(mod(m.disp), x&7, (need_SIB ? rsp : m.base)&7)); + if (need_SIB) { + this->byte(sib(m.scale, m.index&7, m.base&7)); + } + this->bytes(&m.disp, imm_bytes(mod(m.disp))); + } + } + + void Assembler::op(int opcode, int opcode_ext, Operand dst, int imm) { + opcode |= 0b1000'0000; // top bit set for instructions with any immediate + + int imm_bytes = 4; + if (SkTFitsIn(imm)) { + imm_bytes = 1; + opcode |= 0b0000'0010; // second bit set for 8-bit immediate, else 32-bit. + } + + this->op(opcode, dst, (GP64)opcode_ext); + this->bytes(&imm, imm_bytes); + } + + void Assembler::add(Operand dst, int imm) { this->op(0x01,0b000, dst,imm); } + void Assembler::sub(Operand dst, int imm) { this->op(0x01,0b101, dst,imm); } + void Assembler::cmp(Operand dst, int imm) { this->op(0x01,0b111, dst,imm); } + + // These don't work quite like the other instructions with immediates: + // these immediates are always fixed size at 4 bytes or 1 byte. + void Assembler::mov(Operand dst, int imm) { + this->op(0xC7,dst,(GP64)0b000); + this->word(imm); + } + void Assembler::movb(Operand dst, int imm) { + this->op(0xC6,dst,(GP64)0b000); + this->byte(imm); + } + + void Assembler::add (Operand dst, GP64 x) { this->op(0x01, dst,x); } + void Assembler::sub (Operand dst, GP64 x) { this->op(0x29, dst,x); } + void Assembler::cmp (Operand dst, GP64 x) { this->op(0x39, dst,x); } + void Assembler::mov (Operand dst, GP64 x) { this->op(0x89, dst,x); } + void Assembler::movb(Operand dst, GP64 x) { this->op(0x88, dst,x); } + + void Assembler::add (GP64 dst, Operand x) { this->op(0x03, x,dst); } + void Assembler::sub (GP64 dst, Operand x) { this->op(0x2B, x,dst); } + void Assembler::cmp (GP64 dst, Operand x) { this->op(0x3B, x,dst); } + void Assembler::mov (GP64 dst, Operand x) { this->op(0x8B, x,dst); } + void Assembler::movb(GP64 dst, Operand x) { this->op(0x8A, x,dst); } + + void Assembler::movzbq(GP64 dst, Operand x) { this->op(0xB60F, x,dst); } + void Assembler::movzwq(GP64 dst, Operand x) { this->op(0xB70F, x,dst); } + + void Assembler::vpaddd (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xfe, dst,x,y); } + void Assembler::vpsubd (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xfa, dst,x,y); } + void Assembler::vpmulld(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x40, dst,x,y); } + + void Assembler::vpaddw (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xfd, dst,x,y); } + void Assembler::vpsubw (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xf9, dst,x,y); } + void Assembler::vpmullw (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xd5, dst,x,y); } + void Assembler::vpavgw (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xe3, dst,x,y); } + void Assembler::vpmulhrsw(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x0b, dst,x,y); } + void Assembler::vpminsw (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xea, dst,x,y); } + void Assembler::vpmaxsw (Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0xee, dst,x,y); } + void Assembler::vpminuw (Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x3a, dst,x,y); } + void Assembler::vpmaxuw (Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x3e, dst,x,y); } + + void Assembler::vpabsw(Ymm dst, Operand x) { this->op(0x66,0x380f,0x1d, dst,x); } + + + void Assembler::vpand (Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0xdb, dst,x,y); } + void Assembler::vpor (Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0xeb, dst,x,y); } + void Assembler::vpxor (Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0xef, dst,x,y); } + void Assembler::vpandn(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0xdf, dst,x,y); } + + void Assembler::vaddps(Ymm dst, Ymm x, Operand y) { this->op(0,0x0f,0x58, dst,x,y); } + void Assembler::vsubps(Ymm dst, Ymm x, Operand y) { this->op(0,0x0f,0x5c, dst,x,y); } + void Assembler::vmulps(Ymm dst, Ymm x, Operand y) { this->op(0,0x0f,0x59, dst,x,y); } + void Assembler::vdivps(Ymm dst, Ymm x, Operand y) { this->op(0,0x0f,0x5e, dst,x,y); } + void Assembler::vminps(Ymm dst, Ymm x, Operand y) { this->op(0,0x0f,0x5d, dst,x,y); } + void Assembler::vmaxps(Ymm dst, Ymm x, Operand y) { this->op(0,0x0f,0x5f, dst,x,y); } + + void Assembler::vfmadd132ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x98, dst,x,y); } + void Assembler::vfmadd213ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0xa8, dst,x,y); } + void Assembler::vfmadd231ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0xb8, dst,x,y); } + + void Assembler::vfmsub132ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x9a, dst,x,y); } + void Assembler::vfmsub213ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0xaa, dst,x,y); } + void Assembler::vfmsub231ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0xba, dst,x,y); } + + void Assembler::vfnmadd132ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x9c, dst,x,y); } + void Assembler::vfnmadd213ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0xac, dst,x,y); } + void Assembler::vfnmadd231ps(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0xbc, dst,x,y); } + + void Assembler::vpackusdw(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x2b, dst,x,y); } + void Assembler::vpackuswb(Ymm dst, Ymm x, Operand y) { this->op(0x66, 0x0f,0x67, dst,x,y); } + + void Assembler::vpunpckldq(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0x62, dst,x,y); } + void Assembler::vpunpckhdq(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0x6a, dst,x,y); } + + void Assembler::vpcmpeqd(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0x76, dst,x,y); } + void Assembler::vpcmpeqw(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0x75, dst,x,y); } + void Assembler::vpcmpgtd(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0x66, dst,x,y); } + void Assembler::vpcmpgtw(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x0f,0x65, dst,x,y); } + + + void Assembler::imm_byte_after_operand(const Operand& operand, int imm) { + // When we've embedded a label displacement in the middle of an instruction, + // we need to tweak it a little so that the resolved displacement starts + // from the end of the instruction and not the end of the displacement. + if (operand.kind == Operand::LABEL && fCode) { + int disp; + memcpy(&disp, fCode+fSize-4, 4); + disp--; + memcpy(fCode+fSize-4, &disp, 4); + } + this->byte(imm); + } + + void Assembler::vcmpps(Ymm dst, Ymm x, Operand y, int imm) { + this->op(0,0x0f,0xc2, dst,x,y); + this->imm_byte_after_operand(y, imm); + } + + void Assembler::vpblendvb(Ymm dst, Ymm x, Operand y, Ymm z) { + this->op(0x66,0x3a0f,0x4c, dst,x,y); + this->imm_byte_after_operand(y, z << 4); + } + + // Shift instructions encode their opcode extension as "dst", dst as x, and x as y. + void Assembler::vpslld(Ymm dst, Ymm x, int imm) { + this->op(0x66,0x0f,0x72,(Ymm)6, dst,x); + this->byte(imm); + } + void Assembler::vpsrld(Ymm dst, Ymm x, int imm) { + this->op(0x66,0x0f,0x72,(Ymm)2, dst,x); + this->byte(imm); + } + void Assembler::vpsrad(Ymm dst, Ymm x, int imm) { + this->op(0x66,0x0f,0x72,(Ymm)4, dst,x); + this->byte(imm); + } + void Assembler::vpsllw(Ymm dst, Ymm x, int imm) { + this->op(0x66,0x0f,0x71,(Ymm)6, dst,x); + this->byte(imm); + } + void Assembler::vpsrlw(Ymm dst, Ymm x, int imm) { + this->op(0x66,0x0f,0x71,(Ymm)2, dst,x); + this->byte(imm); + } + void Assembler::vpsraw(Ymm dst, Ymm x, int imm) { + this->op(0x66,0x0f,0x71,(Ymm)4, dst,x); + this->byte(imm); + } + + void Assembler::vpermq(Ymm dst, Operand x, int imm) { + // A bit unusual among the instructions we use, this is 64-bit operation, so we set W. + this->op(0x66,0x3a0f,0x00, dst,x,W1); + this->imm_byte_after_operand(x, imm); + } + + void Assembler::vperm2f128(Ymm dst, Ymm x, Operand y, int imm) { + this->op(0x66,0x3a0f,0x06, dst,x,y); + this->imm_byte_after_operand(y, imm); + } + + void Assembler::vpermps(Ymm dst, Ymm ix, Operand src) { + this->op(0x66,0x380f,0x16, dst,ix,src); + } + + void Assembler::vroundps(Ymm dst, Operand x, Rounding imm) { + this->op(0x66,0x3a0f,0x08, dst,x); + this->imm_byte_after_operand(x, imm); + } + + void Assembler::vmovdqa(Ymm dst, Operand src) { this->op(0x66,0x0f,0x6f, dst,src); } + void Assembler::vmovups(Ymm dst, Operand src) { this->op( 0,0x0f,0x10, dst,src); } + void Assembler::vmovups(Xmm dst, Operand src) { this->op( 0,0x0f,0x10, dst,src); } + void Assembler::vmovups(Operand dst, Ymm src) { this->op( 0,0x0f,0x11, src,dst); } + void Assembler::vmovups(Operand dst, Xmm src) { this->op( 0,0x0f,0x11, src,dst); } + + void Assembler::vcvtdq2ps (Ymm dst, Operand x) { this->op( 0,0x0f,0x5b, dst,x); } + void Assembler::vcvttps2dq(Ymm dst, Operand x) { this->op(0xf3,0x0f,0x5b, dst,x); } + void Assembler::vcvtps2dq (Ymm dst, Operand x) { this->op(0x66,0x0f,0x5b, dst,x); } + void Assembler::vsqrtps (Ymm dst, Operand x) { this->op( 0,0x0f,0x51, dst,x); } + + void Assembler::vcvtps2ph(Operand dst, Ymm x, Rounding imm) { + this->op(0x66,0x3a0f,0x1d, x,dst); + this->imm_byte_after_operand(dst, imm); + } + void Assembler::vcvtph2ps(Ymm dst, Operand x) { + this->op(0x66,0x380f,0x13, dst,x); + } + + int Assembler::disp19(Label* l) { + SkASSERT(l->kind == Label::NotYetSet || + l->kind == Label::ARMDisp19); + int here = (int)this->size(); + l->kind = Label::ARMDisp19; + l->references.push_back(here); + // ARM 19-bit instruction count, from the beginning of this instruction. + return (l->offset - here) / 4; + } + + int Assembler::disp32(Label* l) { + SkASSERT(l->kind == Label::NotYetSet || + l->kind == Label::X86Disp32); + int here = (int)this->size(); + l->kind = Label::X86Disp32; + l->references.push_back(here); + // x86 32-bit byte count, from the end of this instruction. + return l->offset - (here + 4); + } + + void Assembler::op(int prefix, int map, int opcode, int dst, int x, Operand y, W w, L l) { + switch (y.kind) { + case Operand::REG: { + VEX v = vex(w, dst>>3, 0, y.reg>>3, + map, x, l, prefix); + this->bytes(v.bytes, v.len); + this->byte(opcode); + this->byte(mod_rm(Mod::Direct, dst&7, y.reg&7)); + } return; + + case Operand::MEM: { + // Passing rsp as the rm argument to mod_rm() signals an SIB byte follows; + // without an SIB byte, that's where the base register would usually go. + // This means we have to use an SIB byte if we want to use rsp as a base register. + const Mem& m = y.mem; + const bool need_SIB = m.base == rsp + || m.index != rsp; + + VEX v = vex(w, dst>>3, m.index>>3, m.base>>3, + map, x, l, prefix); + this->bytes(v.bytes, v.len); + this->byte(opcode); + this->byte(mod_rm(mod(m.disp), dst&7, (need_SIB ? rsp : m.base)&7)); + if (need_SIB) { + this->byte(sib(m.scale, m.index&7, m.base&7)); + } + this->bytes(&m.disp, imm_bytes(mod(m.disp))); + } return; + + case Operand::LABEL: { + // IP-relative addressing uses Mod::Indirect with the R/M encoded as-if rbp or r13. + const int rip = rbp; + + VEX v = vex(w, dst>>3, 0, rip>>3, + map, x, l, prefix); + this->bytes(v.bytes, v.len); + this->byte(opcode); + this->byte(mod_rm(Mod::Indirect, dst&7, rip&7)); + this->word(this->disp32(y.label)); + } return; + } + } + + void Assembler::vpshufb(Ymm dst, Ymm x, Operand y) { this->op(0x66,0x380f,0x00, dst,x,y); } + + void Assembler::vptest(Ymm x, Operand y) { this->op(0x66, 0x380f, 0x17, x,y); } + + void Assembler::vbroadcastss(Ymm dst, Operand y) { this->op(0x66,0x380f,0x18, dst,y); } + + void Assembler::jump(uint8_t condition, Label* l) { + // These conditional jumps can be either 2 bytes (short) or 6 bytes (near): + // 7? one-byte-disp + // 0F 8? four-byte-disp + // We always use the near displacement to make updating labels simpler (no resizing). + this->byte(0x0f); + this->byte(condition); + this->word(this->disp32(l)); + } + void Assembler::je (Label* l) { this->jump(0x84, l); } + void Assembler::jne(Label* l) { this->jump(0x85, l); } + void Assembler::jl (Label* l) { this->jump(0x8c, l); } + void Assembler::jc (Label* l) { this->jump(0x82, l); } + + void Assembler::jmp(Label* l) { + // Like above in jump(), we could use 8-bit displacement here, but always use 32-bit. + this->byte(0xe9); + this->word(this->disp32(l)); + } + + void Assembler::vpmovzxwd(Ymm dst, Operand src) { this->op(0x66,0x380f,0x33, dst,src); } + void Assembler::vpmovzxbd(Ymm dst, Operand src) { this->op(0x66,0x380f,0x31, dst,src); } + + void Assembler::vmovq(Operand dst, Xmm src) { this->op(0x66,0x0f,0xd6, src,dst); } + + void Assembler::vmovd(Operand dst, Xmm src) { this->op(0x66,0x0f,0x7e, src,dst); } + void Assembler::vmovd(Xmm dst, Operand src) { this->op(0x66,0x0f,0x6e, dst,src); } + + void Assembler::vpinsrd(Xmm dst, Xmm src, Operand y, int imm) { + this->op(0x66,0x3a0f,0x22, dst,src,y); + this->imm_byte_after_operand(y, imm); + } + void Assembler::vpinsrw(Xmm dst, Xmm src, Operand y, int imm) { + this->op(0x66,0x0f,0xc4, dst,src,y); + this->imm_byte_after_operand(y, imm); + } + void Assembler::vpinsrb(Xmm dst, Xmm src, Operand y, int imm) { + this->op(0x66,0x3a0f,0x20, dst,src,y); + this->imm_byte_after_operand(y, imm); + } + + void Assembler::vextracti128(Operand dst, Ymm src, int imm) { + this->op(0x66,0x3a0f,0x39, src,dst); + SkASSERT(dst.kind != Operand::LABEL); + this->byte(imm); + } + void Assembler::vpextrd(Operand dst, Xmm src, int imm) { + this->op(0x66,0x3a0f,0x16, src,dst); + SkASSERT(dst.kind != Operand::LABEL); + this->byte(imm); + } + void Assembler::vpextrw(Operand dst, Xmm src, int imm) { + this->op(0x66,0x3a0f,0x15, src,dst); + SkASSERT(dst.kind != Operand::LABEL); + this->byte(imm); + } + void Assembler::vpextrb(Operand dst, Xmm src, int imm) { + this->op(0x66,0x3a0f,0x14, src,dst); + SkASSERT(dst.kind != Operand::LABEL); + this->byte(imm); + } + + void Assembler::vgatherdps(Ymm dst, Scale scale, Ymm ix, GP64 base, Ymm mask) { + // Unlike most instructions, no aliasing is permitted here. + SkASSERT(dst != ix); + SkASSERT(dst != mask); + SkASSERT(mask != ix); + + int prefix = 0x66, + map = 0x380f, + opcode = 0x92; + VEX v = vex(0, dst>>3, ix>>3, base>>3, + map, mask, /*ymm?*/1, prefix); + this->bytes(v.bytes, v.len); + this->byte(opcode); + this->byte(mod_rm(Mod::Indirect, dst&7, rsp/*use SIB*/)); + this->byte(sib(scale, ix&7, base&7)); + } + + // https://static.docs.arm.com/ddi0596/a/DDI_0596_ARM_a64_instruction_set_architecture.pdf + + static int mask(unsigned long long bits) { return (1<<(int)bits)-1; } + + void Assembler::op(uint32_t hi, V m, uint32_t lo, V n, V d) { + this->word( (hi & mask(11)) << 21 + | (m & mask(5)) << 16 + | (lo & mask(6)) << 10 + | (n & mask(5)) << 5 + | (d & mask(5)) << 0); + } + void Assembler::op(uint32_t op22, V n, V d, int imm) { + this->word( (op22 & mask(22)) << 10 + | imm // size and location depends on the instruction + | (n & mask(5)) << 5 + | (d & mask(5)) << 0); + } + + void Assembler::and16b(V d, V n, V m) { this->op(0b0'1'0'01110'00'1, m, 0b00011'1, n, d); } + void Assembler::orr16b(V d, V n, V m) { this->op(0b0'1'0'01110'10'1, m, 0b00011'1, n, d); } + void Assembler::eor16b(V d, V n, V m) { this->op(0b0'1'1'01110'00'1, m, 0b00011'1, n, d); } + void Assembler::bic16b(V d, V n, V m) { this->op(0b0'1'0'01110'01'1, m, 0b00011'1, n, d); } + void Assembler::bsl16b(V d, V n, V m) { this->op(0b0'1'1'01110'01'1, m, 0b00011'1, n, d); } + void Assembler::not16b(V d, V n) { this->op(0b0'1'1'01110'00'10000'00101'10, n, d); } + + void Assembler::add4s(V d, V n, V m) { this->op(0b0'1'0'01110'10'1, m, 0b10000'1, n, d); } + void Assembler::sub4s(V d, V n, V m) { this->op(0b0'1'1'01110'10'1, m, 0b10000'1, n, d); } + void Assembler::mul4s(V d, V n, V m) { this->op(0b0'1'0'01110'10'1, m, 0b10011'1, n, d); } + + void Assembler::cmeq4s(V d, V n, V m) { this->op(0b0'1'1'01110'10'1, m, 0b10001'1, n, d); } + void Assembler::cmgt4s(V d, V n, V m) { this->op(0b0'1'0'01110'10'1, m, 0b0011'0'1, n, d); } + + void Assembler::sub8h(V d, V n, V m) { this->op(0b0'1'1'01110'01'1, m, 0b10000'1, n, d); } + void Assembler::mul8h(V d, V n, V m) { this->op(0b0'1'0'01110'01'1, m, 0b10011'1, n, d); } + + void Assembler::fadd4s(V d, V n, V m) { this->op(0b0'1'0'01110'0'0'1, m, 0b11010'1, n, d); } + void Assembler::fsub4s(V d, V n, V m) { this->op(0b0'1'0'01110'1'0'1, m, 0b11010'1, n, d); } + void Assembler::fmul4s(V d, V n, V m) { this->op(0b0'1'1'01110'0'0'1, m, 0b11011'1, n, d); } + void Assembler::fdiv4s(V d, V n, V m) { this->op(0b0'1'1'01110'0'0'1, m, 0b11111'1, n, d); } + void Assembler::fmin4s(V d, V n, V m) { this->op(0b0'1'0'01110'1'0'1, m, 0b11110'1, n, d); } + void Assembler::fmax4s(V d, V n, V m) { this->op(0b0'1'0'01110'0'0'1, m, 0b11110'1, n, d); } + + void Assembler::fneg4s (V d, V n) { this->op(0b0'1'1'01110'1'0'10000'01111'10, n,d); } + void Assembler::fsqrt4s(V d, V n) { this->op(0b0'1'1'01110'1'0'10000'11111'10, n,d); } + + void Assembler::fcmeq4s(V d, V n, V m) { this->op(0b0'1'0'01110'0'0'1, m, 0b1110'0'1, n, d); } + void Assembler::fcmgt4s(V d, V n, V m) { this->op(0b0'1'1'01110'1'0'1, m, 0b1110'0'1, n, d); } + void Assembler::fcmge4s(V d, V n, V m) { this->op(0b0'1'1'01110'0'0'1, m, 0b1110'0'1, n, d); } + + void Assembler::fmla4s(V d, V n, V m) { this->op(0b0'1'0'01110'0'0'1, m, 0b11001'1, n, d); } + void Assembler::fmls4s(V d, V n, V m) { this->op(0b0'1'0'01110'1'0'1, m, 0b11001'1, n, d); } + + void Assembler::tbl(V d, V n, V m) { this->op(0b0'1'001110'00'0, m, 0b0'00'0'00, n, d); } + + void Assembler::uzp14s(V d, V n, V m) { this->op(0b0'1'001110'10'0, m, 0b0'0'01'10, n, d); } + void Assembler::uzp24s(V d, V n, V m) { this->op(0b0'1'001110'10'0, m, 0b0'1'01'10, n, d); } + void Assembler::zip14s(V d, V n, V m) { this->op(0b0'1'001110'10'0, m, 0b0'0'11'10, n, d); } + void Assembler::zip24s(V d, V n, V m) { this->op(0b0'1'001110'10'0, m, 0b0'1'11'10, n, d); } + + void Assembler::sli4s(V d, V n, int imm5) { + this->op(0b0'1'1'011110'0100'000'01010'1, n, d, ( imm5 & mask(5))<<16); + } + void Assembler::shl4s(V d, V n, int imm5) { + this->op(0b0'1'0'011110'0100'000'01010'1, n, d, ( imm5 & mask(5))<<16); + } + void Assembler::sshr4s(V d, V n, int imm5) { + this->op(0b0'1'0'011110'0100'000'00'0'0'0'1, n, d, (-imm5 & mask(5))<<16); + } + void Assembler::ushr4s(V d, V n, int imm5) { + this->op(0b0'1'1'011110'0100'000'00'0'0'0'1, n, d, (-imm5 & mask(5))<<16); + } + void Assembler::ushr8h(V d, V n, int imm4) { + this->op(0b0'1'1'011110'0010'000'00'0'0'0'1, n, d, (-imm4 & mask(4))<<16); + } + + void Assembler::scvtf4s (V d, V n) { this->op(0b0'1'0'01110'0'0'10000'11101'10, n,d); } + void Assembler::fcvtzs4s(V d, V n) { this->op(0b0'1'0'01110'1'0'10000'1101'1'10, n,d); } + void Assembler::fcvtns4s(V d, V n) { this->op(0b0'1'0'01110'0'0'10000'1101'0'10, n,d); } + void Assembler::frintp4s(V d, V n) { this->op(0b0'1'0'01110'1'0'10000'1100'0'10, n,d); } + void Assembler::frintm4s(V d, V n) { this->op(0b0'1'0'01110'0'0'10000'1100'1'10, n,d); } + + void Assembler::fcvtn(V d, V n) { this->op(0b0'0'0'01110'0'0'10000'10110'10, n,d); } + void Assembler::fcvtl(V d, V n) { this->op(0b0'0'0'01110'0'0'10000'10111'10, n,d); } + + void Assembler::xtns2h(V d, V n) { this->op(0b0'0'0'01110'01'10000'10010'10, n,d); } + void Assembler::xtnh2b(V d, V n) { this->op(0b0'0'0'01110'00'10000'10010'10, n,d); } + + void Assembler::uxtlb2h(V d, V n) { this->op(0b0'0'1'011110'0001'000'10100'1, n,d); } + void Assembler::uxtlh2s(V d, V n) { this->op(0b0'0'1'011110'0010'000'10100'1, n,d); } + + void Assembler::uminv4s(V d, V n) { this->op(0b0'1'1'01110'10'11000'1'1010'10, n,d); } + + void Assembler::brk(int imm16) { + this->op(0b11010100'001'00000000000, (imm16 & mask(16)) << 5); + } + + void Assembler::ret(X n) { this->op(0b1101011'0'0'10'11111'0000'0'0, n, (X)0); } + + void Assembler::add(X d, X n, int imm12) { + this->op(0b1'0'0'10001'00'000000000000, n,d, (imm12 & mask(12)) << 10); + } + void Assembler::sub(X d, X n, int imm12) { + this->op(0b1'1'0'10001'00'000000000000, n,d, (imm12 & mask(12)) << 10); + } + void Assembler::subs(X d, X n, int imm12) { + this->op(0b1'1'1'10001'00'000000000000, n,d, (imm12 & mask(12)) << 10); + } + + void Assembler::add(X d, X n, X m, Shift shift, int imm6) { + SkASSERT(shift != ROR); + + int imm = (imm6 & mask(6)) << 0 + | (m & mask(5)) << 6 + | (0 & mask(1)) << 11 + | (shift & mask(2)) << 12; + this->op(0b1'0'0'01011'00'0'00000'000000, n,d, imm << 10); + } + + void Assembler::b(Condition cond, Label* l) { + const int imm19 = this->disp19(l); + this->op(0b0101010'0'00000000000000, (X)0, (V)cond, (imm19 & mask(19)) << 5); + } + void Assembler::cbz(X t, Label* l) { + const int imm19 = this->disp19(l); + this->op(0b1'011010'0'00000000000000, (X)0, t, (imm19 & mask(19)) << 5); + } + void Assembler::cbnz(X t, Label* l) { + const int imm19 = this->disp19(l); + this->op(0b1'011010'1'00000000000000, (X)0, t, (imm19 & mask(19)) << 5); + } + + void Assembler::ldrd(X dst, X src, int imm12) { + this->op(0b11'111'0'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + void Assembler::ldrs(X dst, X src, int imm12) { + this->op(0b10'111'0'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + void Assembler::ldrh(X dst, X src, int imm12) { + this->op(0b01'111'0'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + void Assembler::ldrb(X dst, X src, int imm12) { + this->op(0b00'111'0'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + + void Assembler::ldrq(V dst, X src, int imm12) { + this->op(0b00'111'1'01'11'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + void Assembler::ldrd(V dst, X src, int imm12) { + this->op(0b11'111'1'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + void Assembler::ldrs(V dst, X src, int imm12) { + this->op(0b10'111'1'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + void Assembler::ldrh(V dst, X src, int imm12) { + this->op(0b01'111'1'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + void Assembler::ldrb(V dst, X src, int imm12) { + this->op(0b00'111'1'01'01'000000000000, src, dst, (imm12 & mask(12)) << 10); + } + + void Assembler::strs(X src, X dst, int imm12) { + this->op(0b10'111'0'01'00'000000000000, dst, src, (imm12 & mask(12)) << 10); + } + + void Assembler::strq(V src, X dst, int imm12) { + this->op(0b00'111'1'01'10'000000000000, dst, src, (imm12 & mask(12)) << 10); + } + void Assembler::strd(V src, X dst, int imm12) { + this->op(0b11'111'1'01'00'000000000000, dst, src, (imm12 & mask(12)) << 10); + } + void Assembler::strs(V src, X dst, int imm12) { + this->op(0b10'111'1'01'00'000000000000, dst, src, (imm12 & mask(12)) << 10); + } + void Assembler::strh(V src, X dst, int imm12) { + this->op(0b01'111'1'01'00'000000000000, dst, src, (imm12 & mask(12)) << 10); + } + void Assembler::strb(V src, X dst, int imm12) { + this->op(0b00'111'1'01'00'000000000000, dst, src, (imm12 & mask(12)) << 10); + } + + void Assembler::movs(X dst, V src, int lane) { + int imm5 = (lane << 3) | 0b100; + this->op(0b0'0'0'01110000'00000'0'01'1'1'1, src, dst, (imm5 & mask(5)) << 16); + } + void Assembler::inss(V dst, X src, int lane) { + int imm5 = (lane << 3) | 0b100; + this->op(0b0'1'0'01110000'00000'0'0011'1, src, dst, (imm5 & mask(5)) << 16); + } + + + void Assembler::ldrq(V dst, Label* l) { + const int imm19 = this->disp19(l); + this->op(0b10'011'1'00'00000000000000, (V)0, dst, (imm19 & mask(19)) << 5); + } + + void Assembler::dup4s(V dst, X src) { + this->op(0b0'1'0'01110000'00100'0'0001'1, src, dst); + } + + void Assembler::ld1r4s(V dst, X src) { + this->op(0b0'1'0011010'1'0'00000'110'0'10, src, dst); + } + void Assembler::ld1r8h(V dst, X src) { + this->op(0b0'1'0011010'1'0'00000'110'0'01, src, dst); + } + void Assembler::ld1r16b(V dst, X src) { + this->op(0b0'1'0011010'1'0'00000'110'0'00, src, dst); + } + + void Assembler::ld24s(V dst, X src) { this->op(0b0'1'0011000'1'000000'1000'10, src, dst); } + void Assembler::ld44s(V dst, X src) { this->op(0b0'1'0011000'1'000000'0000'10, src, dst); } + void Assembler::st24s(V src, X dst) { this->op(0b0'1'0011000'0'000000'1000'10, dst, src); } + void Assembler::st44s(V src, X dst) { this->op(0b0'1'0011000'0'000000'0000'10, dst, src); } + + void Assembler::ld24s(V dst, X src, int lane) { + int Q = (lane & 2)>>1, + S = (lane & 1); + /* Q S */ + this->op(0b0'0'0011010'1'1'00000'100'0'00, src, dst, (Q<<30)|(S<<12)); + } + void Assembler::ld44s(V dst, X src, int lane) { + int Q = (lane & 2)>>1, + S = (lane & 1); + this->op(0b0'0'0011010'1'1'00000'101'0'00, src, dst, (Q<<30)|(S<<12)); + } + + void Assembler::label(Label* l) { + if (fCode) { + // The instructions all currently point to l->offset. + // We'll want to add a delta to point them to here. + int here = (int)this->size(); + int delta = here - l->offset; + l->offset = here; + + if (l->kind == Label::ARMDisp19) { + for (int ref : l->references) { + // ref points to a 32-bit instruction with 19-bit displacement in instructions. + uint32_t inst; + memcpy(&inst, fCode + ref, 4); + + // [ 8 bits to preserve] [ 19 bit signed displacement ] [ 5 bits to preserve ] + int disp = (int)(inst << 8) >> 13; + + disp += delta/4; // delta is in bytes, we want instructions. + + // Put it all back together, preserving the high 8 bits and low 5. + inst = ((disp << 5) & (mask(19) << 5)) + | ((inst ) & ~(mask(19) << 5)); + memcpy(fCode + ref, &inst, 4); + } + } + + if (l->kind == Label::X86Disp32) { + for (int ref : l->references) { + // ref points to a 32-bit displacement in bytes. + int disp; + memcpy(&disp, fCode + ref, 4); + + disp += delta; + + memcpy(fCode + ref, &disp, 4); + } + } + } + } + + void Program::eval(int n, void* args[]) const { + #define SKVM_JIT_STATS 0 + #if SKVM_JIT_STATS + static std::atomic calls{0}, jits{0}, + pixels{0}, fast{0}; + pixels += n; + if (0 == calls++) { + atexit([]{ + int64_t num = jits .load(), + den = calls.load(); + SkDebugf("%.3g%% of %lld eval() calls went through JIT.\n", (100.0 * num)/den, den); + num = fast .load(); + den = pixels.load(); + SkDebugf("%.3g%% of %lld pixels went through JIT.\n", (100.0 * num)/den, den); + }); + } + #endif + + #if !defined(SKVM_JIT_BUT_IGNORE_IT) + const void* jit_entry = fImpl->jit_entry.load(); + // jit_entry may be null if we can't JIT + // + // Ordinarily we'd never find ourselves with non-null jit_entry and !gSkVMAllowJIT, but it + // can happen during interactive programs like Viewer that toggle gSkVMAllowJIT on and off, + // due to timing or program caching. + if (jit_entry != nullptr && gSkVMAllowJIT) { + #if SKVM_JIT_STATS + jits++; + fast += n; + #endif + void** a = args; + switch (fImpl->strides.size()) { + case 0: return ((void(*)(int ))jit_entry)(n ); + case 1: return ((void(*)(int,void* ))jit_entry)(n,a[0] ); + case 2: return ((void(*)(int,void*,void* ))jit_entry)(n,a[0],a[1] ); + case 3: return ((void(*)(int,void*,void*,void* ))jit_entry)(n,a[0],a[1],a[2]); + case 4: return ((void(*)(int,void*,void*,void*,void*))jit_entry) + (n,a[0],a[1],a[2],a[3]); + case 5: return ((void(*)(int,void*,void*,void*,void*,void*))jit_entry) + (n,a[0],a[1],a[2],a[3],a[4]); + case 6: return ((void(*)(int,void*,void*,void*,void*,void*,void*))jit_entry) + (n,a[0],a[1],a[2],a[3],a[4],a[5]); + case 7: return ((void(*)(int,void*,void*,void*,void*,void*,void*,void*))jit_entry) + (n,a[0],a[1],a[2],a[3],a[4],a[5],a[6]); + default: break; //SkASSERT(fImpl->strides.size() <= 7); + } + } + #endif + + // So we'll sometimes use the interpreter here even if later calls will use the JIT. + SkOpts::interpret_skvm(fImpl->instructions.data(), (int)fImpl->instructions.size(), + this->nregs(), this->loop(), fImpl->strides.data(), + fImpl->traceHooks.data(), fImpl->traceHooks.size(), + this->nargs(), n, args); + } + + bool Program::hasTraceHooks() const { + // Identifies a program which has been instrumented for debugging. + return !fImpl->traceHooks.empty(); + } + + bool Program::hasJIT() const { + return fImpl->jit_entry.load() != nullptr; + } + + void Program::dropJIT() { + #if defined(SKVM_JIT) + if (fImpl->dylib) { + close_dylib(fImpl->dylib); + } else if (auto jit_entry = fImpl->jit_entry.load()) { + unmap_jit_buffer(jit_entry, fImpl->jit_size); + } + #else + SkASSERT(!this->hasJIT()); + #endif + + fImpl->jit_entry.store(nullptr); + fImpl->jit_size = 0; + fImpl->dylib = nullptr; + } + + Program::Program() : fImpl(std::make_unique()) {} + + Program::~Program() { + // Moved-from Programs may have fImpl == nullptr. + if (fImpl) { + this->dropJIT(); + } + } + + Program::Program(Program&& other) : fImpl(std::move(other.fImpl)) {} + + Program& Program::operator=(Program&& other) { + fImpl = std::move(other.fImpl); + return *this; + } + + Program::Program(const std::vector& instructions, + std::unique_ptr visualizer, + const std::vector& strides, + const std::vector& traceHooks, + const char* debug_name, bool allow_jit) : Program() { + fImpl->visualizer = std::move(visualizer); + fImpl->strides = strides; + fImpl->traceHooks = traceHooks; + if (gSkVMAllowJIT && allow_jit) { + #if defined(SKVM_JIT) + this->setupJIT(instructions, debug_name); + #endif + } + + this->setupInterpreter(instructions); + } + + std::vector Program::instructions() const { return fImpl->instructions; } + int Program::nargs() const { return (int)fImpl->strides.size(); } + int Program::nregs() const { return fImpl->regs; } + int Program::loop () const { return fImpl->loop; } + bool Program::empty() const { return fImpl->instructions.empty(); } + + // Translate OptimizedInstructions to InterpreterInstructions. + void Program::setupInterpreter(const std::vector& instructions) { + // Register each instruction is assigned to. + std::vector reg(instructions.size()); + + // This next bit is a bit more complicated than strictly necessary; + // we could just assign every instruction to its own register. + // + // But recycling registers is fairly cheap, and good practice for the + // JITs where minimizing register pressure really is important. + // + // We have effectively infinite registers, so we hoist any value we can. + // (The JIT may choose a more complex policy to reduce register pressure.) + + fImpl->regs = 0; + std::vector avail; + + // Assign this value to a register, recycling them where we can. + auto assign_register = [&](Val id) { + const OptimizedInstruction& inst = instructions[id]; + + // If this is a real input and it's lifetime ends at this instruction, + // we can recycle the register it's occupying. + auto maybe_recycle_register = [&](Val input) { + if (input != NA && instructions[input].death == id) { + avail.push_back(reg[input]); + } + }; + + // Take care to not recycle the same register twice. + const Val x = inst.x, y = inst.y, z = inst.z, w = inst.w; + if (true ) { maybe_recycle_register(x); } + if (y != x ) { maybe_recycle_register(y); } + if (z != x && z != y ) { maybe_recycle_register(z); } + if (w != x && w != y && w != z) { maybe_recycle_register(w); } + + // Instructions that die at themselves (stores) don't need a register. + if (inst.death != id) { + // Allocate a register if we have to, preferring to reuse anything available. + if (avail.empty()) { + reg[id] = fImpl->regs++; + } else { + reg[id] = avail.back(); + avail.pop_back(); + } + } + }; + + // Assign a register to each hoisted instruction, then each non-hoisted loop instruction. + for (Val id = 0; id < (Val)instructions.size(); id++) { + if ( instructions[id].can_hoist) { assign_register(id); } + } + for (Val id = 0; id < (Val)instructions.size(); id++) { + if (!instructions[id].can_hoist) { assign_register(id); } + } + + // Translate OptimizedInstructions to InterpreterIstructions by mapping values to + // registers. This will be two passes, first hoisted instructions, then inside the loop. + + // The loop begins at the fImpl->loop'th Instruction. + fImpl->loop = 0; + fImpl->instructions.reserve(instructions.size()); + + // Add a mapping for the N/A sentinel Val to any arbitrary register + // so lookups don't have to know which arguments are used by which Ops. + auto lookup_register = [&](Val id) { + return id == NA ? (Reg)0 + : reg[id]; + }; + + auto push_instruction = [&](Val id, const OptimizedInstruction& inst) { + InterpreterInstruction pinst{ + inst.op, + lookup_register(id), + lookup_register(inst.x), + lookup_register(inst.y), + lookup_register(inst.z), + lookup_register(inst.w), + inst.immA, + inst.immB, + inst.immC, + }; + fImpl->instructions.push_back(pinst); + }; + + for (Val id = 0; id < (Val)instructions.size(); id++) { + const OptimizedInstruction& inst = instructions[id]; + if (inst.can_hoist) { + push_instruction(id, inst); + fImpl->loop++; + } + } + for (Val id = 0; id < (Val)instructions.size(); id++) { + const OptimizedInstruction& inst = instructions[id]; + if (!inst.can_hoist) { + push_instruction(id, inst); + } + } + } + +#if defined(SKVM_JIT) + + namespace SkVMJitTypes { + #if defined(__x86_64__) || defined(_M_X64) + using Reg = Assembler::Ymm; + #elif defined(__aarch64__) + using Reg = Assembler::V; + #endif + } // namespace SkVMJitTypes + + bool Program::jit(const std::vector& instructions, + int* stack_hint, + uint32_t* registers_used, + Assembler* a) const { + using A = Assembler; + using SkVMJitTypes::Reg; + + SkTHashMap constants; // Constants (mostly splats) share the same pool. + A::Label iota; // Varies per lane, for Op::index. + A::Label load64_index; // Used to load low or high half of 64-bit lanes. + + // The `regs` array tracks everything we know about each register's state: + // - NA: empty + // - RES: reserved by ABI + // - TMP: holding a temporary + // - id: holding Val id + constexpr Val RES = NA-1, + TMP = RES-1; + + // Map val -> stack slot. + std::vector stack_slot(instructions.size(), NA); + int next_stack_slot = 0; + + const int nstack_slots = *stack_hint >= 0 ? *stack_hint + : stack_slot.size(); + #if defined(__x86_64__) || defined(_M_X64) + if (!SkCpu::Supports(SkCpu::HSW)) { + return false; + } + const int K = 8; + #if defined(_M_X64) // Important to check this first; clang-cl defines both. + const A::GP64 N = A::rcx, + GP0 = A::rax, + GP1 = A::r11, + arg[] = { A::rdx, A::r8, A::r9, A::r10, A::rdi, A::rsi }; + + // xmm6-15 need are callee-saved. + std::array regs = { + NA, NA, NA, NA, NA, NA,RES,RES, + RES,RES,RES,RES, RES,RES,RES,RES, + }; + const uint32_t incoming_registers_used = *registers_used; + + auto enter = [&]{ + // rcx,rdx,r8,r9 are all already holding their correct values. + // Load caller-saved r10 from rsp+40 if there's a fourth arg. + if (fImpl->strides.size() >= 4) { + a->mov(A::r10, A::Mem{A::rsp, 40}); + } + // Load callee-saved rdi from rsp+48 if there's a fifth arg, + // first saving it to ABI reserved shadow area rsp+8. + if (fImpl->strides.size() >= 5) { + a->mov(A::Mem{A::rsp, 8}, A::rdi); + a->mov(A::rdi, A::Mem{A::rsp, 48}); + } + // Load callee-saved rsi from rsp+56 if there's a sixth arg, + // first saving it to ABI reserved shadow area rsp+16. + if (fImpl->strides.size() >= 6) { + a->mov(A::Mem{A::rsp, 16}, A::rsi); + a->mov(A::rsi, A::Mem{A::rsp, 56}); + } + + // Allocate stack for our values and callee-saved xmm6-15. + int stack_needed = nstack_slots*K*4; + for (int r = 6; r < 16; r++) { + if (incoming_registers_used & (1<sub(A::rsp, stack_needed); } + + int next_saved_xmm = nstack_slots*K*4; + for (int r = 6; r < 16; r++) { + if (incoming_registers_used & (1<vmovups(A::Mem{A::rsp, next_saved_xmm}, (A::Xmm)r); + next_saved_xmm += 16; + regs[r] = NA; + } + } + }; + auto exit = [&]{ + // The second pass of jit() shouldn't use any register it didn't in the first pass. + SkASSERT((*registers_used & incoming_registers_used) == *registers_used); + + // Restore callee-saved xmm6-15 and the stack pointer. + int stack_used = nstack_slots*K*4; + for (int r = 6; r < 16; r++) { + if (incoming_registers_used & (1<vmovups((A::Xmm)r, A::Mem{A::rsp, stack_used}); + stack_used += 16; + } + } + if (stack_used) { a->add(A::rsp, stack_used); } + + // Restore callee-saved rdi/rsi if we used them. + if (fImpl->strides.size() >= 5) { + a->mov(A::rdi, A::Mem{A::rsp, 8}); + } + if (fImpl->strides.size() >= 6) { + a->mov(A::rsi, A::Mem{A::rsp, 16}); + } + + a->vzeroupper(); + a->ret(); + }; + #elif defined(__x86_64__) + const A::GP64 N = A::rdi, + GP0 = A::rax, + GP1 = A::r11, + arg[] = { A::rsi, A::rdx, A::rcx, A::r8, A::r9, A::r10 }; + + // All 16 ymm registers are available to use. + std::array regs = { + NA,NA,NA,NA, NA,NA,NA,NA, + NA,NA,NA,NA, NA,NA,NA,NA, + }; + + auto enter = [&]{ + // Load caller-saved r10 from rsp+8 if there's a sixth arg. + if (fImpl->strides.size() >= 6) { + a->mov(A::r10, A::Mem{A::rsp, 8}); + } + if (nstack_slots) { a->sub(A::rsp, nstack_slots*K*4); } + }; + auto exit = [&]{ + if (nstack_slots) { a->add(A::rsp, nstack_slots*K*4); } + a->vzeroupper(); + a->ret(); + }; + #endif + + auto load_from_memory = [&](Reg r, Val v) { + if (instructions[v].op == Op::splat) { + if (instructions[v].immA == 0) { + a->vpxor(r,r,r); + } else { + a->vmovups(r, constants.find(instructions[v].immA)); + } + } else { + SkASSERT(stack_slot[v] != NA); + a->vmovups(r, A::Mem{A::rsp, stack_slot[v]*K*4}); + } + }; + auto store_to_stack = [&](Reg r, Val v) { + SkASSERT(next_stack_slot < nstack_slots); + stack_slot[v] = next_stack_slot++; + a->vmovups(A::Mem{A::rsp, stack_slot[v]*K*4}, r); + }; + #elif defined(__aarch64__) + const int K = 4; + const A::X N = A::x0, + GP0 = A::x8, + GP1 = A::x9, + arg[] = { A::x1, A::x2, A::x3, A::x4, A::x5, A::x6, A::x7 }; + + // We can use v0-v7 and v16-v31 freely; we'd need to preserve v8-v15 in enter/exit. + std::array regs = { + NA, NA, NA, NA, NA, NA, NA, NA, + RES,RES,RES,RES, RES,RES,RES,RES, + NA, NA, NA, NA, NA, NA, NA, NA, + NA, NA, NA, NA, NA, NA, NA, NA, + }; + + auto enter = [&]{ if (nstack_slots) { a->sub(A::sp, A::sp, nstack_slots*K*4); } }; + auto exit = [&]{ if (nstack_slots) { a->add(A::sp, A::sp, nstack_slots*K*4); } + a->ret(A::x30); }; + + auto load_from_memory = [&](Reg r, Val v) { + if (instructions[v].op == Op::splat) { + if (instructions[v].immA == 0) { + a->eor16b(r,r,r); + } else { + a->ldrq(r, constants.find(instructions[v].immA)); + } + } else { + SkASSERT(stack_slot[v] != NA); + a->ldrq(r, A::sp, stack_slot[v]); + } + }; + auto store_to_stack = [&](Reg r, Val v) { + SkASSERT(next_stack_slot < nstack_slots); + stack_slot[v] = next_stack_slot++; + a->strq(r, A::sp, stack_slot[v]); + }; + #endif + + *registers_used = 0; // We'll update this as we go. + + if (std::size(arg) < fImpl->strides.size()) { + return false; + } + + auto emit = [&](Val id, bool scalar) { + const int active_lanes = scalar ? 1 : K; + const OptimizedInstruction& inst = instructions[id]; + const Op op = inst.op; + const Val x = inst.x, + y = inst.y, + z = inst.z, + w = inst.w; + const int immA = inst.immA, + immB = inst.immB, + immC = inst.immC; + + // alloc_tmp() returns the first of N adjacent temporary registers, + // each freed manually with free_tmp() or noted as our result with mark_tmp_as_dst(). + auto alloc_tmp = [&](int N=1) -> Reg { + auto needs_spill = [&](Val v) -> bool { + SkASSERT(v >= 0); // {NA,TMP,RES} need to be handled before calling this. + return stack_slot[v] == NA // We haven't spilled it already? + && instructions[v].op != Op::splat; // No need to spill constants. + }; + + // We want to find a block of N adjacent registers requiring the fewest spills. + int best_block = -1, + min_spills = 0x7fff'ffff; + for (int block = 0; block+N <= (int)regs.size(); block++) { + int spills = 0; + for (int r = block; r < block+N; r++) { + Val v = regs[r]; + // Registers holding NA (nothing) are ideal, nothing to spill. + if (v == NA) { + continue; + } + // We can't spill anything REServed or that we'll need this instruction. + if (v == RES || + v == TMP || v == id || v == x || v == y || v == z || v == w) { + spills = 0x7fff'ffff; + block = r; // (optimization) continue outer loop at next register. + break; + } + // Usually here we've got a value v that we'd have to spill to the stack + // before reusing its register, but sometimes even now we get a freebie. + spills += needs_spill(v) ? 1 : 0; + } + + // TODO: non-arbitrary tie-breaking? + if (min_spills > spills) { + min_spills = spills; + best_block = block; + } + if (min_spills == 0) { + break; // (optimization) stop early if we find an unbeatable block. + } + } + + // TODO: our search's success isn't obviously guaranteed... it depends on N + // and the number and relative position in regs of any unspillable values. + // I think we should be able to get away with N≤2 on x86-64 and N≤4 on arm64; + // we'll need to revisit this logic should this assert fire. + SkASSERT(min_spills <= N); + + // Spill what needs spilling, and mark the block all as TMP. + for (int r = best_block; r < best_block+N; r++) { + Val& v = regs[r]; + *registers_used |= (1<= 0); + if (v >= 0 && needs_spill(v)) { + store_to_stack((Reg)r, v); + SkASSERT(!needs_spill(v)); + min_spills--; + } + + v = TMP; + } + SkASSERT(min_spills == 0); + return (Reg)best_block; + }; + + auto free_tmp = [&](Reg r) { + SkASSERT(regs[r] == TMP); + regs[r] = NA; + }; + + // Which register holds dst,x,y,z,w for this instruction? NA if none does yet. + int rd = NA, + rx = NA, + ry = NA, + rz = NA, + rw = NA; + + auto update_regs = [&](Reg r, Val v) { + if (v == id) { rd = r; } + if (v == x) { rx = r; } + if (v == y) { ry = r; } + if (v == z) { rz = r; } + if (v == w) { rw = r; } + return r; + }; + + auto find_existing_reg = [&](Val v) -> int { + // Quick-check our working registers. + if (v == id && rd != NA) { return rd; } + if (v == x && rx != NA) { return rx; } + if (v == y && ry != NA) { return ry; } + if (v == z && rz != NA) { return rz; } + if (v == w && rw != NA) { return rw; } + + // Search inter-instruction register map. + for (auto [r,val] : SkMakeEnumerate(regs)) { + if (val == v) { + return update_regs((Reg)r, v); + } + } + return NA; + }; + + // Return a register for Val, holding that value if it already exists. + // During this instruction all calls to r(v) will return the same register. + auto r = [&](Val v) -> Reg { + SkASSERT(v >= 0); + + if (int found = find_existing_reg(v); found != NA) { + return (Reg)found; + } + + Reg r = alloc_tmp(); + SkASSERT(regs[r] == TMP); + + SkASSERT(v <= id); + if (v < id) { + // If v < id, we're loading one of this instruction's inputs. + // If v == id we're just allocating its destination register. + load_from_memory(r, v); + } + regs[r] = v; + return update_regs(r, v); + }; + + auto dies_here = [&](Val v) -> bool { + SkASSERT(v >= 0); + return instructions[v].death == id; + }; + + // Alias dst() to r(v) if dies_here(v). + auto try_alias = [&](Val v) -> bool { + SkASSERT(v == x || v == y || v == z || v == w); + if (dies_here(v)) { + rd = r(v); // Vals v and id share a register for this instruction. + regs[rd] = id; // Next instruction, Val id will be in the register, not Val v. + return true; + } + return false; + }; + + // Generally r(id), + // but with a hint, try to alias dst() to r(v) if dies_here(v). + auto dst = [&](Val hint1 = NA, Val hint2 = NA) -> Reg { + if (hint1 != NA && try_alias(hint1)) { return r(id); } + if (hint2 != NA && try_alias(hint2)) { return r(id); } + return r(id); + }; + + #if defined(__aarch64__) // Nothing sneaky, just unused on x86-64. + auto mark_tmp_as_dst = [&](Reg tmp) { + SkASSERT(regs[tmp] == TMP); + rd = tmp; + regs[rd] = id; + SkASSERT(dst() == tmp); + }; + #endif + + #if defined(__x86_64__) || defined(_M_X64) + // On x86 we can work with many values directly from the stack or program constant pool. + auto any = [&](Val v) -> A::Operand { + SkASSERT(v >= 0); + SkASSERT(v < id); + + if (int found = find_existing_reg(v); found != NA) { + return (Reg)found; + } + if (instructions[v].op == Op::splat) { + return constants.find(instructions[v].immA); + } + return A::Mem{A::rsp, stack_slot[v]*K*4}; + }; + + // This is never really worth asking except when any() might be used; + // if we need this value in ARM, might as well just call r(v) to get it into a register. + auto in_reg = [&](Val v) -> bool { + return find_existing_reg(v) != NA; + }; + #endif + + switch (op) { + // Make sure splat constants can be found by load_from_memory() or any(). + case Op::splat: + (void)constants[immA]; + break; + + #if defined(__x86_64__) || defined(_M_X64) + case Op::assert_true: { + a->vptest (r(x), &constants[0xffffffff]); + A::Label all_true; + a->jc(&all_true); + a->int3(); + a->label(&all_true); + } break; + + case Op::trace_line: + case Op::trace_var: + case Op::trace_enter: + case Op::trace_exit: + case Op::trace_scope: + /* Force this program to run in the interpreter. */ + return false; + + case Op::store8: + if (scalar) { + a->vpextrb(A::Mem{arg[immA]}, (A::Xmm)r(x), 0); + } else { + a->vpackusdw(dst(x), r(x), r(x)); + a->vpermq (dst(), dst(), 0xd8); + a->vpackuswb(dst(), dst(), dst()); + a->vmovq (A::Mem{arg[immA]}, (A::Xmm)dst()); + } break; + + case Op::store16: + if (scalar) { + a->vpextrw(A::Mem{arg[immA]}, (A::Xmm)r(x), 0); + } else { + a->vpackusdw(dst(x), r(x), r(x)); + a->vpermq (dst(), dst(), 0xd8); + a->vmovups (A::Mem{arg[immA]}, (A::Xmm)dst()); + } break; + + case Op::store32: if (scalar) { a->vmovd (A::Mem{arg[immA]}, (A::Xmm)r(x)); } + else { a->vmovups(A::Mem{arg[immA]}, r(x)); } + break; + + case Op::store64: if (scalar) { + a->vmovd(A::Mem{arg[immA],0}, (A::Xmm)r(x)); + a->vmovd(A::Mem{arg[immA],4}, (A::Xmm)r(y)); + } else { + // r(x) = {a,b,c,d|e,f,g,h} + // r(y) = {i,j,k,l|m,n,o,p} + // We want to write a,i,b,j,c,k,d,l,e,m... + A::Ymm L = alloc_tmp(), + H = alloc_tmp(); + a->vpunpckldq(L, r(x), any(y)); // L = {a,i,b,j|e,m,f,n} + a->vpunpckhdq(H, r(x), any(y)); // H = {c,k,d,l|g,o,h,p} + a->vperm2f128(dst(), L,H, 0x20); // = {a,i,b,j|c,k,d,l} + a->vmovups(A::Mem{arg[immA], 0}, dst()); + a->vperm2f128(dst(), L,H, 0x31); // = {e,m,f,n|g,o,h,p} + a->vmovups(A::Mem{arg[immA],32}, dst()); + free_tmp(L); + free_tmp(H); + } break; + + case Op::store128: { + // TODO: >32-bit stores + a->vmovd (A::Mem{arg[immA], 0*16 + 0}, (A::Xmm)r(x) ); + a->vmovd (A::Mem{arg[immA], 0*16 + 4}, (A::Xmm)r(y) ); + a->vmovd (A::Mem{arg[immA], 0*16 + 8}, (A::Xmm)r(z) ); + a->vmovd (A::Mem{arg[immA], 0*16 + 12}, (A::Xmm)r(w) ); + if (scalar) { break; } + + a->vpextrd(A::Mem{arg[immA], 1*16 + 0}, (A::Xmm)r(x), 1); + a->vpextrd(A::Mem{arg[immA], 1*16 + 4}, (A::Xmm)r(y), 1); + a->vpextrd(A::Mem{arg[immA], 1*16 + 8}, (A::Xmm)r(z), 1); + a->vpextrd(A::Mem{arg[immA], 1*16 + 12}, (A::Xmm)r(w), 1); + + a->vpextrd(A::Mem{arg[immA], 2*16 + 0}, (A::Xmm)r(x), 2); + a->vpextrd(A::Mem{arg[immA], 2*16 + 4}, (A::Xmm)r(y), 2); + a->vpextrd(A::Mem{arg[immA], 2*16 + 8}, (A::Xmm)r(z), 2); + a->vpextrd(A::Mem{arg[immA], 2*16 + 12}, (A::Xmm)r(w), 2); + + a->vpextrd(A::Mem{arg[immA], 3*16 + 0}, (A::Xmm)r(x), 3); + a->vpextrd(A::Mem{arg[immA], 3*16 + 4}, (A::Xmm)r(y), 3); + a->vpextrd(A::Mem{arg[immA], 3*16 + 8}, (A::Xmm)r(z), 3); + a->vpextrd(A::Mem{arg[immA], 3*16 + 12}, (A::Xmm)r(w), 3); + // Now we need to store the upper 128 bits of x,y,z,w. + // Storing in this order rather than interlacing minimizes temporaries. + a->vextracti128(dst(), r(x), 1); + a->vmovd (A::Mem{arg[immA], 4*16 + 0}, (A::Xmm)dst() ); + a->vpextrd(A::Mem{arg[immA], 5*16 + 0}, (A::Xmm)dst(), 1); + a->vpextrd(A::Mem{arg[immA], 6*16 + 0}, (A::Xmm)dst(), 2); + a->vpextrd(A::Mem{arg[immA], 7*16 + 0}, (A::Xmm)dst(), 3); + + a->vextracti128(dst(), r(y), 1); + a->vmovd (A::Mem{arg[immA], 4*16 + 4}, (A::Xmm)dst() ); + a->vpextrd(A::Mem{arg[immA], 5*16 + 4}, (A::Xmm)dst(), 1); + a->vpextrd(A::Mem{arg[immA], 6*16 + 4}, (A::Xmm)dst(), 2); + a->vpextrd(A::Mem{arg[immA], 7*16 + 4}, (A::Xmm)dst(), 3); + + a->vextracti128(dst(), r(z), 1); + a->vmovd (A::Mem{arg[immA], 4*16 + 8}, (A::Xmm)dst() ); + a->vpextrd(A::Mem{arg[immA], 5*16 + 8}, (A::Xmm)dst(), 1); + a->vpextrd(A::Mem{arg[immA], 6*16 + 8}, (A::Xmm)dst(), 2); + a->vpextrd(A::Mem{arg[immA], 7*16 + 8}, (A::Xmm)dst(), 3); + + a->vextracti128(dst(), r(w), 1); + a->vmovd (A::Mem{arg[immA], 4*16 + 12}, (A::Xmm)dst() ); + a->vpextrd(A::Mem{arg[immA], 5*16 + 12}, (A::Xmm)dst(), 1); + a->vpextrd(A::Mem{arg[immA], 6*16 + 12}, (A::Xmm)dst(), 2); + a->vpextrd(A::Mem{arg[immA], 7*16 + 12}, (A::Xmm)dst(), 3); + } break; + + case Op::load8: if (scalar) { + a->vpxor (dst(), dst(), dst()); + a->vpinsrb((A::Xmm)dst(), (A::Xmm)dst(), A::Mem{arg[immA]}, 0); + } else { + a->vpmovzxbd(dst(), A::Mem{arg[immA]}); + } break; + + case Op::load16: if (scalar) { + a->vpxor (dst(), dst(), dst()); + a->vpinsrw((A::Xmm)dst(), (A::Xmm)dst(), A::Mem{arg[immA]}, 0); + } else { + a->vpmovzxwd(dst(), A::Mem{arg[immA]}); + } break; + + case Op::load32: if (scalar) { a->vmovd ((A::Xmm)dst(), A::Mem{arg[immA]}); } + else { a->vmovups( dst(), A::Mem{arg[immA]}); } + break; + + case Op::load64: if (scalar) { + a->vmovd((A::Xmm)dst(), A::Mem{arg[immA], 4*immB}); + } else { + A::Ymm tmp = alloc_tmp(); + a->vmovups(tmp, &load64_index); + a->vpermps(dst(), tmp, A::Mem{arg[immA], 0}); + a->vpermps( tmp, tmp, A::Mem{arg[immA], 32}); + // Low 128 bits holds immB=0 lanes, high 128 bits holds immB=1. + a->vperm2f128(dst(), dst(),tmp, immB ? 0x31 : 0x20); + free_tmp(tmp); + } break; + + case Op::load128: if (scalar) { + a->vmovd((A::Xmm)dst(), A::Mem{arg[immA], 4*immB}); + } else { + // Load 4 low values into xmm tmp, + A::Ymm tmp = alloc_tmp(); + A::Xmm t = (A::Xmm)tmp; + a->vmovd (t, A::Mem{arg[immA], 0*16 + 4*immB} ); + a->vpinsrd(t,t, A::Mem{arg[immA], 1*16 + 4*immB}, 1); + a->vpinsrd(t,t, A::Mem{arg[immA], 2*16 + 4*immB}, 2); + a->vpinsrd(t,t, A::Mem{arg[immA], 3*16 + 4*immB}, 3); + + // Load 4 high values into xmm dst(), + A::Xmm d = (A::Xmm)dst(); + a->vmovd (d, A::Mem{arg[immA], 4*16 + 4*immB} ); + a->vpinsrd(d,d, A::Mem{arg[immA], 5*16 + 4*immB}, 1); + a->vpinsrd(d,d, A::Mem{arg[immA], 6*16 + 4*immB}, 2); + a->vpinsrd(d,d, A::Mem{arg[immA], 7*16 + 4*immB}, 3); + + // Merge the two, ymm dst() = {xmm tmp|xmm dst()} + a->vperm2f128(dst(), tmp,dst(), 0x20); + free_tmp(tmp); + } break; + + case Op::gather8: { + // As usual, the gather base pointer is immB bytes off of uniform immA. + a->mov(GP0, A::Mem{arg[immA], immB}); + + A::Ymm tmp = alloc_tmp(); + a->vmovups(tmp, any(x)); + + for (int i = 0; i < active_lanes; i++) { + if (i == 4) { + // vpextrd can only pluck indices out from an Xmm register, + // so we manually swap over to the top when we're halfway through. + a->vextracti128((A::Xmm)tmp, tmp, 1); + } + a->vpextrd(GP1, (A::Xmm)tmp, i%4); + a->vpinsrb((A::Xmm)dst(), (A::Xmm)dst(), A::Mem{GP0,0,GP1,A::ONE}, i); + } + a->vpmovzxbd(dst(), dst()); + free_tmp(tmp); + } break; + + case Op::gather16: { + // Just as gather8 except vpinsrb->vpinsrw, ONE->TWO, and vpmovzxbd->vpmovzxwd. + a->mov(GP0, A::Mem{arg[immA], immB}); + + A::Ymm tmp = alloc_tmp(); + a->vmovups(tmp, any(x)); + + for (int i = 0; i < active_lanes; i++) { + if (i == 4) { + a->vextracti128((A::Xmm)tmp, tmp, 1); + } + a->vpextrd(GP1, (A::Xmm)tmp, i%4); + a->vpinsrw((A::Xmm)dst(), (A::Xmm)dst(), A::Mem{GP0,0,GP1,A::TWO}, i); + } + a->vpmovzxwd(dst(), dst()); + free_tmp(tmp); + } break; + + case Op::gather32: + if (scalar) { + // Our gather base pointer is immB bytes off of uniform immA. + a->mov(GP0, A::Mem{arg[immA], immB}); + + // Grab our index from lane 0 of the index argument. + a->vmovd(GP1, (A::Xmm)r(x)); + + // dst = *(base + 4*index) + a->vmovd((A::Xmm)dst(x), A::Mem{GP0, 0, GP1, A::FOUR}); + } else { + a->mov(GP0, A::Mem{arg[immA], immB}); + + A::Ymm mask = alloc_tmp(); + a->vpcmpeqd(mask, mask, mask); // (All lanes enabled.) + + a->vgatherdps(dst(), A::FOUR, r(x), GP0, mask); + free_tmp(mask); + } + break; + + case Op::uniform32: a->vbroadcastss(dst(), A::Mem{arg[immA], immB}); + break; + + case Op::array32: a->mov(GP0, A::Mem{arg[immA], immB}); + a->vbroadcastss(dst(), A::Mem{GP0, immC}); + break; + + case Op::index: a->vmovd((A::Xmm)dst(), N); + a->vbroadcastss(dst(), dst()); + a->vpsubd(dst(), dst(), &iota); + break; + + // We can swap the arguments of symmetric instructions to make better use of any(). + case Op::add_f32: + if (in_reg(x)) { a->vaddps(dst(x), r(x), any(y)); } + else { a->vaddps(dst(y), r(y), any(x)); } + break; + + case Op::mul_f32: + if (in_reg(x)) { a->vmulps(dst(x), r(x), any(y)); } + else { a->vmulps(dst(y), r(y), any(x)); } + break; + + case Op::sub_f32: a->vsubps(dst(x), r(x), any(y)); break; + case Op::div_f32: a->vdivps(dst(x), r(x), any(y)); break; + case Op::min_f32: a->vminps(dst(y), r(y), any(x)); break; // Order matters, + case Op::max_f32: a->vmaxps(dst(y), r(y), any(x)); break; // see test SkVM_min_max. + + case Op::fma_f32: + if (try_alias(x)) { a->vfmadd132ps(dst(x), r(z), any(y)); } else + if (try_alias(y)) { a->vfmadd213ps(dst(y), r(x), any(z)); } else + if (try_alias(z)) { a->vfmadd231ps(dst(z), r(x), any(y)); } else + { a->vmovups (dst(), any(x)); + a->vfmadd132ps(dst(), r(z), any(y)); } + break; + + case Op::fms_f32: + if (try_alias(x)) { a->vfmsub132ps(dst(x), r(z), any(y)); } else + if (try_alias(y)) { a->vfmsub213ps(dst(y), r(x), any(z)); } else + if (try_alias(z)) { a->vfmsub231ps(dst(z), r(x), any(y)); } else + { a->vmovups (dst(), any(x)); + a->vfmsub132ps(dst(), r(z), any(y)); } + break; + + case Op::fnma_f32: + if (try_alias(x)) { a->vfnmadd132ps(dst(x), r(z), any(y)); } else + if (try_alias(y)) { a->vfnmadd213ps(dst(y), r(x), any(z)); } else + if (try_alias(z)) { a->vfnmadd231ps(dst(z), r(x), any(y)); } else + { a->vmovups (dst(), any(x)); + a->vfnmadd132ps(dst(), r(z), any(y)); } + break; + + // In situations like this we want to try aliasing dst(x) when x is + // already in a register, but not if we'd have to load it from the stack + // just to alias it. That's done better directly into the new register. + case Op::sqrt_f32: + if (in_reg(x)) { a->vsqrtps(dst(x), r(x)); } + else { a->vsqrtps(dst(), any(x)); } + break; + + case Op::add_i32: + if (in_reg(x)) { a->vpaddd(dst(x), r(x), any(y)); } + else { a->vpaddd(dst(y), r(y), any(x)); } + break; + + case Op::mul_i32: + if (in_reg(x)) { a->vpmulld(dst(x), r(x), any(y)); } + else { a->vpmulld(dst(y), r(y), any(x)); } + break; + + case Op::sub_i32: a->vpsubd(dst(x), r(x), any(y)); break; + + case Op::bit_and: + if (in_reg(x)) { a->vpand(dst(x), r(x), any(y)); } + else { a->vpand(dst(y), r(y), any(x)); } + break; + case Op::bit_or: + if (in_reg(x)) { a->vpor(dst(x), r(x), any(y)); } + else { a->vpor(dst(y), r(y), any(x)); } + break; + case Op::bit_xor: + if (in_reg(x)) { a->vpxor(dst(x), r(x), any(y)); } + else { a->vpxor(dst(y), r(y), any(x)); } + break; + + case Op::bit_clear: a->vpandn(dst(y), r(y), any(x)); break; // Notice, y then x. + + case Op::select: + if (try_alias(z)) { a->vpblendvb(dst(z), r(z), any(y), r(x)); } + else { a->vpblendvb(dst(x), r(z), any(y), r(x)); } + break; + + case Op::shl_i32: a->vpslld(dst(x), r(x), immA); break; + case Op::shr_i32: a->vpsrld(dst(x), r(x), immA); break; + case Op::sra_i32: a->vpsrad(dst(x), r(x), immA); break; + + case Op::eq_i32: + if (in_reg(x)) { a->vpcmpeqd(dst(x), r(x), any(y)); } + else { a->vpcmpeqd(dst(y), r(y), any(x)); } + break; + + case Op::gt_i32: a->vpcmpgtd(dst(), r(x), any(y)); break; + + case Op::eq_f32: + if (in_reg(x)) { a->vcmpeqps(dst(x), r(x), any(y)); } + else { a->vcmpeqps(dst(y), r(y), any(x)); } + break; + case Op::neq_f32: + if (in_reg(x)) { a->vcmpneqps(dst(x), r(x), any(y)); } + else { a->vcmpneqps(dst(y), r(y), any(x)); } + break; + + case Op:: gt_f32: a->vcmpltps (dst(y), r(y), any(x)); break; + case Op::gte_f32: a->vcmpleps (dst(y), r(y), any(x)); break; + + case Op::ceil: + if (in_reg(x)) { a->vroundps(dst(x), r(x), Assembler::CEIL); } + else { a->vroundps(dst(), any(x), Assembler::CEIL); } + break; + + case Op::floor: + if (in_reg(x)) { a->vroundps(dst(x), r(x), Assembler::FLOOR); } + else { a->vroundps(dst(), any(x), Assembler::FLOOR); } + break; + + case Op::to_f32: + if (in_reg(x)) { a->vcvtdq2ps(dst(x), r(x)); } + else { a->vcvtdq2ps(dst(), any(x)); } + break; + + case Op::trunc: + if (in_reg(x)) { a->vcvttps2dq(dst(x), r(x)); } + else { a->vcvttps2dq(dst(), any(x)); } + break; + + case Op::round: + if (in_reg(x)) { a->vcvtps2dq(dst(x), r(x)); } + else { a->vcvtps2dq(dst(), any(x)); } + break; + + case Op::to_fp16: + a->vcvtps2ph(dst(x), r(x), A::CURRENT); // f32 ymm -> f16 xmm + a->vpmovzxwd(dst(), dst()); // f16 xmm -> f16 ymm + break; + + case Op::from_fp16: + a->vpackusdw(dst(x), r(x), r(x)); // f16 ymm -> f16 xmm + a->vpermq (dst(), dst(), 0xd8); // swap middle two 64-bit lanes + a->vcvtph2ps(dst(), dst()); // f16 xmm -> f32 ymm + break; + + case Op::duplicate: break; + + #elif defined(__aarch64__) + case Op::assert_true: { + a->uminv4s(dst(), r(x)); // uminv acts like an all() across the vector. + a->movs(GP0, dst(), 0); + A::Label all_true; + a->cbnz(GP0, &all_true); + a->brk(0); + a->label(&all_true); + } break; + + case Op::trace_line: + case Op::trace_var: + case Op::trace_enter: + case Op::trace_exit: + case Op::trace_scope: + /* Force this program to run in the interpreter. */ + return false; + + case Op::index: { + A::V tmp = alloc_tmp(); + a->ldrq (tmp, &iota); + a->dup4s(dst(), N); + a->sub4s(dst(), dst(), tmp); + free_tmp(tmp); + } break; + + case Op::store8: a->xtns2h(dst(x), r(x)); + a->xtnh2b(dst(), dst()); + if (scalar) { a->strb (dst(), arg[immA]); } + else { a->strs (dst(), arg[immA]); } + break; + + case Op::store16: a->xtns2h(dst(x), r(x)); + if (scalar) { a->strh (dst(), arg[immA]); } + else { a->strd (dst(), arg[immA]); } + break; + + case Op::store32: if (scalar) { a->strs(r(x), arg[immA]); } + else { a->strq(r(x), arg[immA]); } + break; + + case Op::store64: if (scalar) { + a->strs(r(x), arg[immA], 0); + a->strs(r(y), arg[immA], 1); + } else if (r(y) == r(x)+1) { + a->st24s(r(x), arg[immA]); + } else { + Reg tmp0 = alloc_tmp(2), + tmp1 = (Reg)(tmp0+1); + a->orr16b(tmp0, r(x), r(x)); + a->orr16b(tmp1, r(y), r(y)); + a-> st24s(tmp0, arg[immA]); + free_tmp(tmp0); + free_tmp(tmp1); + } break; + + case Op::store128: + if (scalar) { + a->strs(r(x), arg[immA], 0); + a->strs(r(y), arg[immA], 1); + a->strs(r(z), arg[immA], 2); + a->strs(r(w), arg[immA], 3); + } else if (r(y) == r(x)+1 && + r(z) == r(x)+2 && + r(w) == r(x)+3) { + a->st44s(r(x), arg[immA]); + } else { + Reg tmp0 = alloc_tmp(4), + tmp1 = (Reg)(tmp0+1), + tmp2 = (Reg)(tmp0+2), + tmp3 = (Reg)(tmp0+3); + a->orr16b(tmp0, r(x), r(x)); + a->orr16b(tmp1, r(y), r(y)); + a->orr16b(tmp2, r(z), r(z)); + a->orr16b(tmp3, r(w), r(w)); + a-> st44s(tmp0, arg[immA]); + free_tmp(tmp0); + free_tmp(tmp1); + free_tmp(tmp2); + free_tmp(tmp3); + } break; + + + case Op::load8: if (scalar) { a->ldrb(dst(), arg[immA]); } + else { a->ldrs(dst(), arg[immA]); } + a->uxtlb2h(dst(), dst()); + a->uxtlh2s(dst(), dst()); + break; + + case Op::load16: if (scalar) { a->ldrh(dst(), arg[immA]); } + else { a->ldrd(dst(), arg[immA]); } + a->uxtlh2s(dst(), dst()); + break; + + case Op::load32: if (scalar) { a->ldrs(dst(), arg[immA]); } + else { a->ldrq(dst(), arg[immA]); } + break; + + case Op::load64: if (scalar) { + a->ldrs(dst(), arg[immA], immB); + } else { + Reg tmp0 = alloc_tmp(2), + tmp1 = (Reg)(tmp0+1); + a->ld24s(tmp0, arg[immA]); + // TODO: return both + switch (immB) { + case 0: mark_tmp_as_dst(tmp0); free_tmp(tmp1); break; + case 1: mark_tmp_as_dst(tmp1); free_tmp(tmp0); break; + } + } break; + + case Op::load128: if (scalar) { + a->ldrs(dst(), arg[immA], immB); + } else { + Reg tmp0 = alloc_tmp(4), + tmp1 = (Reg)(tmp0+1), + tmp2 = (Reg)(tmp0+2), + tmp3 = (Reg)(tmp0+3); + a->ld44s(tmp0, arg[immA]); + // TODO: return all four + switch (immB) { + case 0: mark_tmp_as_dst(tmp0); break; + case 1: mark_tmp_as_dst(tmp1); break; + case 2: mark_tmp_as_dst(tmp2); break; + case 3: mark_tmp_as_dst(tmp3); break; + } + if (immB != 0) { free_tmp(tmp0); } + if (immB != 1) { free_tmp(tmp1); } + if (immB != 2) { free_tmp(tmp2); } + if (immB != 3) { free_tmp(tmp3); } + } break; + + case Op::uniform32: a->add(GP0, arg[immA], immB); + a->ld1r4s(dst(), GP0); + break; + + case Op::array32: a->add(GP0, arg[immA], immB); + a->ldrd(GP0, GP0); + a->add(GP0, GP0, immC); + a->ld1r4s(dst(), GP0); + break; + + case Op::gather8: { + // As usual, the gather base pointer is immB bytes off of uniform immA. + a->add (GP0, arg[immA], immB); // GP0 = &(gather base pointer) + a->ldrd(GP0, GP0); // GP0 = gather base pointer + + for (int i = 0; i < active_lanes; i++) { + a->movs(GP1, r(x), i); // Extract index lane i into GP1. + a->add (GP1, GP0, GP1); // Add the gather base pointer. + a->ldrb(GP1, GP1); // Load that byte. + a->inss(dst(x), GP1, i); // Insert it into dst() lane i. + } + } break; + + // See gather8 for general idea; comments here only where gather16 differs. + case Op::gather16: { + a->add (GP0, arg[immA], immB); + a->ldrd(GP0, GP0); + for (int i = 0; i < active_lanes; i++) { + a->movs(GP1, r(x), i); + a->add (GP1, GP0, GP1, A::LSL, 1); // Scale index 2x into a byte offset. + a->ldrh(GP1, GP1); // 2-byte load. + a->inss(dst(x), GP1, i); + } + } break; + + // See gather8 for general idea; comments here only where gather32 differs. + case Op::gather32: { + a->add (GP0, arg[immA], immB); + a->ldrd(GP0, GP0); + for (int i = 0; i < active_lanes; i++) { + a->movs(GP1, r(x), i); + a->add (GP1, GP0, GP1, A::LSL, 2); // Scale index 4x into a byte offset. + a->ldrs(GP1, GP1); // 4-byte load. + a->inss(dst(x), GP1, i); + } + } break; + + case Op::add_f32: a->fadd4s(dst(x,y), r(x), r(y)); break; + case Op::sub_f32: a->fsub4s(dst(x,y), r(x), r(y)); break; + case Op::mul_f32: a->fmul4s(dst(x,y), r(x), r(y)); break; + case Op::div_f32: a->fdiv4s(dst(x,y), r(x), r(y)); break; + + case Op::sqrt_f32: a->fsqrt4s(dst(x), r(x)); break; + + case Op::fma_f32: // fmla.4s is z += x*y + if (try_alias(z)) { a->fmla4s( r(z), r(x), r(y)); } + else { a->orr16b(dst(), r(z), r(z)); + a->fmla4s(dst(), r(x), r(y)); } + break; + + case Op::fnma_f32: // fmls.4s is z -= x*y + if (try_alias(z)) { a->fmls4s( r(z), r(x), r(y)); } + else { a->orr16b(dst(), r(z), r(z)); + a->fmls4s(dst(), r(x), r(y)); } + break; + + case Op::fms_f32: // calculate z - xy, then negate to xy - z + if (try_alias(z)) { a->fmls4s( r(z), r(x), r(y)); } + else { a->orr16b(dst(), r(z), r(z)); + a->fmls4s(dst(), r(x), r(y)); } + a->fneg4s(dst(), dst()); + break; + + case Op:: gt_f32: a->fcmgt4s (dst(x,y), r(x), r(y)); break; + case Op::gte_f32: a->fcmge4s (dst(x,y), r(x), r(y)); break; + case Op:: eq_f32: a->fcmeq4s (dst(x,y), r(x), r(y)); break; + case Op::neq_f32: a->fcmeq4s (dst(x,y), r(x), r(y)); + a->not16b (dst(), dst()); break; + + + case Op::add_i32: a->add4s(dst(x,y), r(x), r(y)); break; + case Op::sub_i32: a->sub4s(dst(x,y), r(x), r(y)); break; + case Op::mul_i32: a->mul4s(dst(x,y), r(x), r(y)); break; + + case Op::bit_and : a->and16b(dst(x,y), r(x), r(y)); break; + case Op::bit_or : a->orr16b(dst(x,y), r(x), r(y)); break; + case Op::bit_xor : a->eor16b(dst(x,y), r(x), r(y)); break; + case Op::bit_clear: a->bic16b(dst(x,y), r(x), r(y)); break; + + case Op::select: // bsl16b is x = x ? y : z + if (try_alias(x)) { a->bsl16b( r(x), r(y), r(z)); } + else { a->orr16b(dst(), r(x), r(x)); + a->bsl16b(dst(), r(y), r(z)); } + break; + + // fmin4s and fmax4s don't work the way we want with NaN, + // so we write them the long way: + case Op::min_f32: // min(x,y) = yfcmgt4s(dst(), r(x), r(y)); + a->bsl16b (dst(), r(y), r(x)); + break; + + case Op::max_f32: // max(x,y) = xfcmgt4s(dst(), r(y), r(x)); + a->bsl16b (dst(), r(y), r(x)); + break; + + case Op::shl_i32: a-> shl4s(dst(x), r(x), immA); break; + case Op::shr_i32: a->ushr4s(dst(x), r(x), immA); break; + case Op::sra_i32: a->sshr4s(dst(x), r(x), immA); break; + + case Op::eq_i32: a->cmeq4s(dst(x,y), r(x), r(y)); break; + case Op::gt_i32: a->cmgt4s(dst(x,y), r(x), r(y)); break; + + case Op::to_f32: a->scvtf4s (dst(x), r(x)); break; + case Op::trunc: a->fcvtzs4s(dst(x), r(x)); break; + case Op::round: a->fcvtns4s(dst(x), r(x)); break; + case Op::ceil: a->frintp4s(dst(x), r(x)); break; + case Op::floor: a->frintm4s(dst(x), r(x)); break; + + case Op::to_fp16: + a->fcvtn (dst(x), r(x)); // 4x f32 -> 4x f16 in bottom four lanes + a->uxtlh2s(dst(), dst()); // expand to 4x f16 in even 16-bit lanes + break; + + case Op::from_fp16: + a->xtns2h(dst(x), r(x)); // pack even 16-bit lanes into bottom four lanes + a->fcvtl (dst(), dst()); // 4x f16 -> 4x f32 + break; + + case Op::duplicate: break; + #endif + } + + // Proactively free the registers holding any value that dies here. + if (rd != NA && dies_here(regs[rd])) { regs[rd] = NA; } + if (rx != NA && regs[rx] != NA && dies_here(regs[rx])) { regs[rx] = NA; } + if (ry != NA && regs[ry] != NA && dies_here(regs[ry])) { regs[ry] = NA; } + if (rz != NA && regs[rz] != NA && dies_here(regs[rz])) { regs[rz] = NA; } + if (rw != NA && regs[rw] != NA && dies_here(regs[rw])) { regs[rw] = NA; } + return true; + }; + + #if defined(__x86_64__) || defined(_M_X64) + auto jump_if_less = [&](A::Label* l) { a->jl (l); }; + auto jump = [&](A::Label* l) { a->jmp(l); }; + + auto add = [&](A::GP64 gp, int imm) { a->add(gp, imm); }; + auto sub = [&](A::GP64 gp, int imm) { a->sub(gp, imm); }; + #elif defined(__aarch64__) + auto jump_if_less = [&](A::Label* l) { a->blt(l); }; + auto jump = [&](A::Label* l) { a->b (l); }; + + auto add = [&](A::X gp, int imm) { a->add(gp, gp, imm); }; + auto sub = [&](A::X gp, int imm) { a->sub(gp, gp, imm); }; + #endif + + A::Label body, + tail, + done; + + enter(); + for (Val id = 0; id < (Val)instructions.size(); id++) { + if (fImpl->visualizer && is_trace(instructions[id].op)) { + // Make sure trace commands stay on JIT for visualizer + continue; + } + if (instructions[id].can_hoist && !emit(id, /*scalar=*/false)) { + return false; + } + } + + // This point marks a kind of canonical fixed point for register contents: if loop + // code is generated as if these registers are holding these values, the next time + // the loop comes around we'd better find those same registers holding those same values. + auto restore_incoming_regs = [&,incoming=regs,saved_stack_slot=stack_slot, + saved_next_stack_slot=next_stack_slot]{ + for (int r = 0; r < (int)regs.size(); r++) { + if (regs[r] != incoming[r]) { + regs[r] = incoming[r]; + if (regs[r] >= 0) { + load_from_memory((Reg)r, regs[r]); + } + } + } + *stack_hint = std::max(*stack_hint, next_stack_slot); + stack_slot = saved_stack_slot; + next_stack_slot = saved_next_stack_slot; + }; + + a->label(&body); + { + a->cmp(N, K); + jump_if_less(&tail); + for (Val id = 0; id < (Val)instructions.size(); id++) { + if (fImpl->visualizer != nullptr && is_trace(instructions[id].op)) { + // Make sure trace commands stay on JIT for visualizer + continue; + } + if (!instructions[id].can_hoist && !emit(id, /*scalar=*/false)) { + return false; + } + } + restore_incoming_regs(); + for (int i = 0; i < (int)fImpl->strides.size(); i++) { + if (fImpl->strides[i]) { + add(arg[i], K*fImpl->strides[i]); + } + } + sub(N, K); + jump(&body); + } + + a->label(&tail); + { + a->cmp(N, 1); + jump_if_less(&done); + for (Val id = 0; id < (Val)instructions.size(); id++) { + if (fImpl->visualizer && is_trace(instructions[id].op)) { + // Make sure trace commands stay on JIT for visualizer + continue; + } + if (!instructions[id].can_hoist && !emit(id, /*scalar=*/true)) { + return false; + } + } + restore_incoming_regs(); + for (int i = 0; i < (int)fImpl->strides.size(); i++) { + if (fImpl->strides[i]) { + add(arg[i], 1*fImpl->strides[i]); + } + } + sub(N, 1); + jump(&tail); + } + + a->label(&done); + { + exit(); + } + + // On ARM64, we use immediate offsets to adjust the stack pointer, and those are limited to + // 12 bits. If our function is going to require more than 4k of stack, just fail. We could + // tweak the code that adjusts `sp`, but then we risk exceeding the (larger) immediate limit + // on our sp-relative load and store opcodes. + #if defined(__aarch64__) + const int stack_bytes = (*stack_hint) * K * 4; + if (stack_bytes > mask(12)) { + return false; + } + #endif + + // Except for explicit aligned load and store instructions, AVX allows + // memory operands to be unaligned. So even though we're creating 16 + // byte patterns on ARM or 32-byte patterns on x86, we only need to + // align to 4 bytes, the element size and alignment requirement. + + constants.foreach([&](int imm, A::Label* label) { + a->align(4); + a->label(label); + for (int i = 0; i < K; i++) { + a->word(imm); + } + }); + + if (!iota.references.empty()) { + a->align(4); + a->label(&iota); // 0,1,2,3,4,... + for (int i = 0; i < K; i++) { + a->word(i); + } + } + + if (!load64_index.references.empty()) { + a->align(4); + a->label(&load64_index); // {0,2,4,6|1,3,5,7} + a->word(0); a->word(2); a->word(4); a->word(6); + a->word(1); a->word(3); a->word(5); a->word(7); + } + + return true; + } + + void Program::setupJIT(const std::vector& instructions, + const char* debug_name) { + // Assemble with no buffer to determine a.size() (the number of bytes we'll assemble) + // and stack_hint/registers_used to feed forward into the next jit() call. + Assembler a{nullptr}; + int stack_hint = -1; + uint32_t registers_used = 0xffff'ffff; // Start conservatively with all. + if (!this->jit(instructions, &stack_hint, ®isters_used, &a)) { + return; + } + + fImpl->jit_size = a.size(); + void* jit_entry = alloc_jit_buffer(&fImpl->jit_size); + fImpl->jit_entry.store(jit_entry); + + // Assemble the program for real with stack_hint/registers_used as feedback from first call. + a = Assembler{jit_entry}; + SkAssertResult(this->jit(instructions, &stack_hint, ®isters_used, &a)); + SkASSERT(a.size() <= fImpl->jit_size); + + // Remap as executable, and flush caches on platforms that need that. + remap_as_executable(jit_entry, fImpl->jit_size); + + #if !defined(SK_BUILD_FOR_WIN) + // For profiling and debugging, it's helpful to have this code loaded + // dynamically rather than just jumping info fImpl->jit_entry. + if (gSkVMJITViaDylib) { + // Dump the raw program binary. + SkString path = SkStringPrintf("/tmp/%s.XXXXXX", debug_name); + int fd = mkstemp(path.data()); + ::write(fd, jit_entry, a.size()); + close(fd); + + this->dropJIT(); // (unmap and null out fImpl->jit_entry.) + + // Convert it in-place to a dynamic library with a single symbol "skvm_jit": + SkString cmd = SkStringPrintf( + "echo '.global _skvm_jit\n_skvm_jit: .incbin \"%s\"'" + " | clang -x assembler -shared - -o %s", + path.c_str(), path.c_str()); + #if defined(__aarch64__) + cmd.append(" -arch arm64"); + #endif + system(cmd.c_str()); + + // Load that dynamic library and look up skvm_jit(). + fImpl->dylib = dlopen(path.c_str(), RTLD_NOW|RTLD_LOCAL); + void* sym = nullptr; + for (const char* name : {"skvm_jit", "_skvm_jit"} ) { + if (!sym) { sym = dlsym(fImpl->dylib, name); } + } + fImpl->jit_entry.store(sym); + } + #endif + } + + void Program::disassemble(SkWStream* o) const { + #if !defined(SK_BUILD_FOR_WIN) + SkDebugfStream debug; + if (!o) { o = &debug; } + + const void* jit_entry = fImpl->jit_entry.load(); + size_t jit_size = fImpl->jit_size; + + if (!jit_entry) { + o->writeText("Program not JIT'd. Did you pass --jit?\n"); + return; + } + + char path[] = "/tmp/skvm-jit.XXXXXX"; + int fd = mkstemp(path); + ::write(fd, jit_entry, jit_size); + close(fd); + + // Convert it in-place to a dynamic library with a single symbol "skvm_jit": + SkString cmd = SkStringPrintf( + "echo '.global _skvm_jit\n_skvm_jit: .incbin \"%s\"'" + " | clang -x assembler -shared - -o %s", + path, path); + #if defined(__aarch64__) + cmd.append(" -arch arm64"); + #endif + system(cmd.c_str()); + + // Now objdump to disassemble our function: + // TODO: We could trim this down to just our code using '--disassemble=`, + // but the symbol name varies with OS, and that option may be missing from objdump on some + // machines? There also apears to be quite a bit of junk after the end of the JIT'd code. + // Trimming that would let us pass '--visualize-jumps' and get the loop annotated. + // With the junk, we tend to end up with a bunch of stray jumps that pollute the ASCII art. + cmd = SkStringPrintf("objdump -D %s", path); + #if defined(SK_BUILD_FOR_UNIX) + cmd.append(" --section=.text"); + #endif + FILE* fp = popen(cmd.c_str(), "r"); + if (!fp) { + o->writeText("objdump failed\n"); + return; + } + + char line[1024]; + while (fgets(line, sizeof(line), fp)) { + o->writeText(line); + } + + pclose(fp); + #endif + } + +#endif + +} // namespace skvm diff --git a/gfx/skia/skia/src/core/SkVM.h b/gfx/skia/skia/src/core/SkVM.h new file mode 100644 index 0000000000..89fe090252 --- /dev/null +++ b/gfx/skia/skia/src/core/SkVM.h @@ -0,0 +1,1369 @@ +/* + * Copyright 2019 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkVM_DEFINED +#define SkVM_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorType.h" +#include "include/core/SkSpan.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTArray.h" +#include "src/core/SkTHash.h" +#include "src/core/SkVM_fwd.h" +#include // std::vector + +class SkWStream; + +#if defined(SKVM_JIT_WHEN_POSSIBLE) && !defined(SK_BUILD_FOR_IOS) + #if defined(__x86_64__) || defined(_M_X64) + #if defined(_WIN32) || defined(__linux) || defined(__APPLE__) + #define SKVM_JIT + #endif + #endif + #if defined(__aarch64__) + #if defined(__ANDROID__) || defined(__APPLE__) + #define SKVM_JIT + #endif + #endif +#endif + +#if 0 + #undef SKVM_JIT +#endif + +namespace SkSL { +class TraceHook; +} + +namespace skvm { + + namespace viz { + class Visualizer; + } + + class Assembler { + public: + explicit Assembler(void* buf); + + size_t size() const; + + // Order matters... GP64, Xmm, Ymm values match 4-bit register encoding for each. + enum GP64 { + rax, rcx, rdx, rbx, rsp, rbp, rsi, rdi, + r8 , r9 , r10, r11, r12, r13, r14, r15, + }; + enum Xmm { + xmm0, xmm1, xmm2 , xmm3 , xmm4 , xmm5 , xmm6 , xmm7 , + xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15, + }; + enum Ymm { + ymm0, ymm1, ymm2 , ymm3 , ymm4 , ymm5 , ymm6 , ymm7 , + ymm8, ymm9, ymm10, ymm11, ymm12, ymm13, ymm14, ymm15, + }; + + // X and V values match 5-bit encoding for each (nothing tricky). + enum X { + x0 , x1 , x2 , x3 , x4 , x5 , x6 , x7 , + x8 , x9 , x10, x11, x12, x13, x14, x15, + x16, x17, x18, x19, x20, x21, x22, x23, + x24, x25, x26, x27, x28, x29, x30, xzr, sp=xzr, + }; + enum V { + v0 , v1 , v2 , v3 , v4 , v5 , v6 , v7 , + v8 , v9 , v10, v11, v12, v13, v14, v15, + v16, v17, v18, v19, v20, v21, v22, v23, + v24, v25, v26, v27, v28, v29, v30, v31, + }; + + void bytes(const void*, int); + void byte(uint8_t); + void word(uint32_t); + + struct Label { + int offset = 0; + enum { NotYetSet, ARMDisp19, X86Disp32 } kind = NotYetSet; + SkSTArray<2, int> references; + }; + + // x86-64 + + void align(int mod); + + void int3(); + void vzeroupper(); + void ret(); + + // Mem represents a value at base + disp + scale*index, + // or simply at base + disp if index=rsp. + enum Scale { ONE, TWO, FOUR, EIGHT }; + struct Mem { + GP64 base; + int disp = 0; + GP64 index = rsp; + Scale scale = ONE; + }; + + struct Operand { + union { + int reg; + Mem mem; + Label* label; + }; + enum { REG, MEM, LABEL } kind; + + Operand(GP64 r) : reg (r), kind(REG ) {} + Operand(Xmm r) : reg (r), kind(REG ) {} + Operand(Ymm r) : reg (r), kind(REG ) {} + Operand(Mem m) : mem (m), kind(MEM ) {} + Operand(Label* l) : label(l), kind(LABEL) {} + }; + + void vpand (Ymm dst, Ymm x, Operand y); + void vpandn(Ymm dst, Ymm x, Operand y); + void vpor (Ymm dst, Ymm x, Operand y); + void vpxor (Ymm dst, Ymm x, Operand y); + + void vpaddd (Ymm dst, Ymm x, Operand y); + void vpsubd (Ymm dst, Ymm x, Operand y); + void vpmulld(Ymm dst, Ymm x, Operand y); + + void vpaddw (Ymm dst, Ymm x, Operand y); + void vpsubw (Ymm dst, Ymm x, Operand y); + void vpmullw (Ymm dst, Ymm x, Operand y); + + void vpabsw (Ymm dst, Operand x); + void vpavgw (Ymm dst, Ymm x, Operand y); // dst = (x+y+1)>>1, unsigned. + void vpmulhrsw(Ymm dst, Ymm x, Operand y); // dst = (x*y + (1<<14)) >> 15, signed. + void vpminsw (Ymm dst, Ymm x, Operand y); + void vpminuw (Ymm dst, Ymm x, Operand y); + void vpmaxsw (Ymm dst, Ymm x, Operand y); + void vpmaxuw (Ymm dst, Ymm x, Operand y); + + void vaddps(Ymm dst, Ymm x, Operand y); + void vsubps(Ymm dst, Ymm x, Operand y); + void vmulps(Ymm dst, Ymm x, Operand y); + void vdivps(Ymm dst, Ymm x, Operand y); + void vminps(Ymm dst, Ymm x, Operand y); + void vmaxps(Ymm dst, Ymm x, Operand y); + + void vsqrtps(Ymm dst, Operand x); + + void vfmadd132ps(Ymm dst, Ymm x, Operand y); + void vfmadd213ps(Ymm dst, Ymm x, Operand y); + void vfmadd231ps(Ymm dst, Ymm x, Operand y); + + void vfmsub132ps(Ymm dst, Ymm x, Operand y); + void vfmsub213ps(Ymm dst, Ymm x, Operand y); + void vfmsub231ps(Ymm dst, Ymm x, Operand y); + + void vfnmadd132ps(Ymm dst, Ymm x, Operand y); + void vfnmadd213ps(Ymm dst, Ymm x, Operand y); + void vfnmadd231ps(Ymm dst, Ymm x, Operand y); + + void vpackusdw(Ymm dst, Ymm x, Operand y); + void vpackuswb(Ymm dst, Ymm x, Operand y); + + void vpunpckldq(Ymm dst, Ymm x, Operand y); + void vpunpckhdq(Ymm dst, Ymm x, Operand y); + + void vpcmpeqd(Ymm dst, Ymm x, Operand y); + void vpcmpgtd(Ymm dst, Ymm x, Operand y); + void vpcmpeqw(Ymm dst, Ymm x, Operand y); + void vpcmpgtw(Ymm dst, Ymm x, Operand y); + + void vcmpps (Ymm dst, Ymm x, Operand y, int imm); + void vcmpeqps (Ymm dst, Ymm x, Operand y) { this->vcmpps(dst,x,y,0); } + void vcmpltps (Ymm dst, Ymm x, Operand y) { this->vcmpps(dst,x,y,1); } + void vcmpleps (Ymm dst, Ymm x, Operand y) { this->vcmpps(dst,x,y,2); } + void vcmpneqps(Ymm dst, Ymm x, Operand y) { this->vcmpps(dst,x,y,4); } + + // Sadly, the x parameter cannot be a general Operand for these shifts. + void vpslld(Ymm dst, Ymm x, int imm); + void vpsrld(Ymm dst, Ymm x, int imm); + void vpsrad(Ymm dst, Ymm x, int imm); + + void vpsllw(Ymm dst, Ymm x, int imm); + void vpsrlw(Ymm dst, Ymm x, int imm); + void vpsraw(Ymm dst, Ymm x, int imm); + + void vpermq (Ymm dst, Operand x, int imm); + void vperm2f128(Ymm dst, Ymm x, Operand y, int imm); + void vpermps (Ymm dst, Ymm ix, Operand src); // dst[i] = src[ix[i]] + + enum Rounding { NEAREST, FLOOR, CEIL, TRUNC, CURRENT }; + void vroundps(Ymm dst, Operand x, Rounding); + + void vmovdqa(Ymm dst, Operand x); + void vmovups(Ymm dst, Operand x); + void vmovups(Xmm dst, Operand x); + void vmovups(Operand dst, Ymm x); + void vmovups(Operand dst, Xmm x); + + void vcvtdq2ps (Ymm dst, Operand x); + void vcvttps2dq(Ymm dst, Operand x); + void vcvtps2dq (Ymm dst, Operand x); + + void vcvtps2ph(Operand dst, Ymm x, Rounding); + void vcvtph2ps(Ymm dst, Operand x); + + void vpblendvb(Ymm dst, Ymm x, Operand y, Ymm z); + + void vpshufb(Ymm dst, Ymm x, Operand y); + + void vptest(Ymm x, Operand y); + + void vbroadcastss(Ymm dst, Operand y); + + void vpmovzxwd(Ymm dst, Operand src); // dst = src, 128-bit, uint16_t -> int + void vpmovzxbd(Ymm dst, Operand src); // dst = src, 64-bit, uint8_t -> int + + void vmovq(Operand dst, Xmm src); // dst = src, 64-bit + void vmovd(Operand dst, Xmm src); // dst = src, 32-bit + void vmovd(Xmm dst, Operand src); // dst = src, 32-bit + + void vpinsrd(Xmm dst, Xmm src, Operand y, int imm); // dst = src; dst[imm] = y, 32-bit + void vpinsrw(Xmm dst, Xmm src, Operand y, int imm); // dst = src; dst[imm] = y, 16-bit + void vpinsrb(Xmm dst, Xmm src, Operand y, int imm); // dst = src; dst[imm] = y, 8-bit + + void vextracti128(Operand dst, Ymm src, int imm); // dst = src[imm], 128-bit + void vpextrd (Operand dst, Xmm src, int imm); // dst = src[imm], 32-bit + void vpextrw (Operand dst, Xmm src, int imm); // dst = src[imm], 16-bit + void vpextrb (Operand dst, Xmm src, int imm); // dst = src[imm], 8-bit + + // if (mask & 0x8000'0000) { + // dst = base[scale*ix]; + // } + // mask = 0; + void vgatherdps(Ymm dst, Scale scale, Ymm ix, GP64 base, Ymm mask); + + + void label(Label*); + + void jmp(Label*); + void je (Label*); + void jne(Label*); + void jl (Label*); + void jc (Label*); + + void add (Operand dst, int imm); + void sub (Operand dst, int imm); + void cmp (Operand dst, int imm); + void mov (Operand dst, int imm); + void movb(Operand dst, int imm); + + void add (Operand dst, GP64 x); + void sub (Operand dst, GP64 x); + void cmp (Operand dst, GP64 x); + void mov (Operand dst, GP64 x); + void movb(Operand dst, GP64 x); + + void add (GP64 dst, Operand x); + void sub (GP64 dst, Operand x); + void cmp (GP64 dst, Operand x); + void mov (GP64 dst, Operand x); + void movb(GP64 dst, Operand x); + + // Disambiguators... choice is arbitrary (but generates different code!). + void add (GP64 dst, GP64 x) { this->add (Operand(dst), x); } + void sub (GP64 dst, GP64 x) { this->sub (Operand(dst), x); } + void cmp (GP64 dst, GP64 x) { this->cmp (Operand(dst), x); } + void mov (GP64 dst, GP64 x) { this->mov (Operand(dst), x); } + void movb(GP64 dst, GP64 x) { this->movb(Operand(dst), x); } + + void movzbq(GP64 dst, Operand x); // dst = x, uint8_t -> int + void movzwq(GP64 dst, Operand x); // dst = x, uint16_t -> int + + // aarch64 + + // d = op(n,m) + using DOpNM = void(V d, V n, V m); + DOpNM and16b, orr16b, eor16b, bic16b, bsl16b, + add4s, sub4s, mul4s, + cmeq4s, cmgt4s, + sub8h, mul8h, + fadd4s, fsub4s, fmul4s, fdiv4s, fmin4s, fmax4s, + fcmeq4s, fcmgt4s, fcmge4s, + tbl, + uzp14s, uzp24s, + zip14s, zip24s; + + // TODO: there are also float ==,<,<=,>,>= instructions with an immediate 0.0f, + // and the register comparison > and >= can also compare absolute values. Interesting. + + // d += n*m + void fmla4s(V d, V n, V m); + + // d -= n*m + void fmls4s(V d, V n, V m); + + // d = op(n,imm) + using DOpNImm = void(V d, V n, int imm); + DOpNImm sli4s, + shl4s, sshr4s, ushr4s, + ushr8h; + + // d = op(n) + using DOpN = void(V d, V n); + DOpN not16b, // d = ~n + fneg4s, // d = -n + fsqrt4s, // d = sqrtf(n) + scvtf4s, // int -> float + fcvtzs4s, // truncate float -> int + fcvtns4s, // round float -> int (nearest even) + frintp4s, // round float -> int as float, toward plus infinity (ceil) + frintm4s, // round float -> int as float, toward minus infinity (floor) + fcvtn, // f32 -> f16 in low half + fcvtl, // f16 in low half -> f32 + xtns2h, // u32 -> u16 + xtnh2b, // u16 -> u8 + uxtlb2h, // u8 -> u16 (TODO: this is a special case of ushll.8h) + uxtlh2s, // u16 -> u32 (TODO: this is a special case of ushll.4s) + uminv4s; // dst[0] = min(n[0],n[1],n[2],n[3]), n as unsigned + + void brk (int imm16); + void ret (X); + void add (X d, X n, int imm12); + void sub (X d, X n, int imm12); + void subs(X d, X n, int imm12); // subtract setting condition flags + + enum Shift { LSL,LSR,ASR,ROR }; + void add (X d, X n, X m, Shift=LSL, int imm6=0); // d=n+Shift(m,imm6), for Shift != ROR. + + // There's another encoding for unconditional branches that can jump further, + // but this one encoded as b.al is simple to implement and should be fine. + void b (Label* l) { this->b(Condition::al, l); } + void bne(Label* l) { this->b(Condition::ne, l); } + void blt(Label* l) { this->b(Condition::lt, l); } + + // "cmp ..." is just an assembler mnemonic for "subs xzr, ..."! + void cmp(X n, int imm12) { this->subs(xzr, n, imm12); } + + // Compare and branch if zero/non-zero, as if + // cmp(t,0) + // beq/bne(l) + // but without setting condition flags. + void cbz (X t, Label* l); + void cbnz(X t, Label* l); + + // TODO: there are ldur variants with unscaled imm, useful? + void ldrd(X dst, X src, int imm12=0); // 64-bit dst = *(src+imm12*8) + void ldrs(X dst, X src, int imm12=0); // 32-bit dst = *(src+imm12*4) + void ldrh(X dst, X src, int imm12=0); // 16-bit dst = *(src+imm12*2) + void ldrb(X dst, X src, int imm12=0); // 8-bit dst = *(src+imm12) + + void ldrq(V dst, Label*); // 128-bit PC-relative load + + void ldrq(V dst, X src, int imm12=0); // 128-bit dst = *(src+imm12*16) + void ldrd(V dst, X src, int imm12=0); // 64-bit dst = *(src+imm12*8) + void ldrs(V dst, X src, int imm12=0); // 32-bit dst = *(src+imm12*4) + void ldrh(V dst, X src, int imm12=0); // 16-bit dst = *(src+imm12*2) + void ldrb(V dst, X src, int imm12=0); // 8-bit dst = *(src+imm12) + + void strs(X src, X dst, int imm12=0); // 32-bit *(dst+imm12*4) = src + + void strq(V src, X dst, int imm12=0); // 128-bit *(dst+imm12*16) = src + void strd(V src, X dst, int imm12=0); // 64-bit *(dst+imm12*8) = src + void strs(V src, X dst, int imm12=0); // 32-bit *(dst+imm12*4) = src + void strh(V src, X dst, int imm12=0); // 16-bit *(dst+imm12*2) = src + void strb(V src, X dst, int imm12=0); // 8-bit *(dst+imm12) = src + + void movs(X dst, V src, int lane); // dst = 32-bit src[lane] + void inss(V dst, X src, int lane); // dst[lane] = 32-bit src + + void dup4s (V dst, X src); // Each 32-bit lane = src + + void ld1r4s (V dst, X src); // Each 32-bit lane = *src + void ld1r8h (V dst, X src); // Each 16-bit lane = *src + void ld1r16b(V dst, X src); // Each 8-bit lane = *src + + void ld24s(V dst, X src); // deinterleave(dst,dst+1) = 256-bit *src + void ld44s(V dst, X src); // deinterleave(dst,dst+1,dst+2,dst+3) = 512-bit *src + void st24s(V src, X dst); // 256-bit *dst = interleave_32bit_lanes(src,src+1) + void st44s(V src, X dst); // 512-bit *dst = interleave_32bit_lanes(src,src+1,src+2,src+3) + + void ld24s(V dst, X src, int lane); // Load 2 32-bit values into given lane of dst..dst+1 + void ld44s(V dst, X src, int lane); // Load 4 32-bit values into given lane of dst..dst+3 + + private: + uint8_t* fCode; + size_t fSize; + + // x86-64 + enum W { W0, W1 }; // Are the lanes 64-bit (W1) or default (W0)? Intel Vol 2A 2.3.5.5 + enum L { L128, L256 }; // Is this a 128- or 256-bit operation? Intel Vol 2A 2.3.6.2 + + // Helpers for vector instructions. + void op(int prefix, int map, int opcode, int dst, int x, Operand y, W,L); + void op(int p, int m, int o, Ymm d, Ymm x, Operand y, W w=W0) { op(p,m,o, d,x,y,w,L256); } + void op(int p, int m, int o, Ymm d, Operand y, W w=W0) { op(p,m,o, d,0,y,w,L256); } + void op(int p, int m, int o, Xmm d, Xmm x, Operand y, W w=W0) { op(p,m,o, d,x,y,w,L128); } + void op(int p, int m, int o, Xmm d, Operand y, W w=W0) { op(p,m,o, d,0,y,w,L128); } + + // Helpers for GP64 instructions. + void op(int opcode, Operand dst, GP64 x); + void op(int opcode, int opcode_ext, Operand dst, int imm); + + void jump(uint8_t condition, Label*); + int disp32(Label*); + void imm_byte_after_operand(const Operand&, int byte); + + // aarch64 + + // Opcode for 3-arguments ops is split between hi and lo: + // [11 bits hi] [5 bits m] [6 bits lo] [5 bits n] [5 bits d] + void op(uint32_t hi, V m, uint32_t lo, V n, V d); + + // 0,1,2-argument ops, with or without an immediate: + // [ 22 bits op ] [5 bits n] [5 bits d] + // Any immediate falls in the middle somewhere overlapping with either op, n, or both. + void op(uint32_t op22, V n, V d, int imm=0); + void op(uint32_t op22, X n, V d, int imm=0) { this->op(op22,(V)n, d,imm); } + void op(uint32_t op22, V n, X d, int imm=0) { this->op(op22, n,(V)d,imm); } + void op(uint32_t op22, X n, X d, int imm=0) { this->op(op22,(V)n,(V)d,imm); } + void op(uint32_t op22, int imm=0) { this->op(op22,(V)0,(V)0,imm); } + // (1-argument ops don't seem to have a consistent convention of passing as n or d.) + + + // Order matters... value is 4-bit encoding for condition code. + enum class Condition { eq,ne,cs,cc,mi,pl,vs,vc,hi,ls,ge,lt,gt,le,al }; + void b(Condition, Label*); + int disp19(Label*); + }; + + // Order matters a little: Ops <=store128 are treated as having side effects. + #define SKVM_OPS(M) \ + M(assert_true) \ + M(trace_line) M(trace_var) \ + M(trace_enter) M(trace_exit) M(trace_scope) \ + M(store8) M(store16) M(store32) M(store64) M(store128) \ + M(load8) M(load16) M(load32) M(load64) M(load128) \ + M(index) \ + M(gather8) M(gather16) M(gather32) \ + M(uniform32) \ + M(array32) \ + M(splat) \ + M(add_f32) M(add_i32) \ + M(sub_f32) M(sub_i32) \ + M(mul_f32) M(mul_i32) \ + M(div_f32) \ + M(min_f32) M(max_f32) \ + M(fma_f32) M(fms_f32) M(fnma_f32) \ + M(sqrt_f32) \ + M(shl_i32) M(shr_i32) M(sra_i32) \ + M(ceil) M(floor) M(trunc) M(round) M(to_fp16) M(from_fp16) \ + M(to_f32) \ + M(neq_f32) M(eq_f32) M(eq_i32) \ + M(gte_f32) M(gt_f32) M(gt_i32) \ + M(bit_and) M(bit_or) M(bit_xor) M(bit_clear) \ + M(select) \ + M(duplicate) + // End of SKVM_OPS + + enum class Op : int { + #define M(op) op, + SKVM_OPS(M) + #undef M + }; + + static inline bool has_side_effect(Op op) { + return op <= Op::store128; + } + static inline bool touches_varying_memory(Op op) { + return Op::store8 <= op && op <= Op::load128; + } + static inline bool is_always_varying(Op op) { + return Op::store8 <= op && op <= Op::index; + } + static inline bool is_trace(Op op) { + return Op::trace_line <= op && op <= Op::trace_scope; + } + + using Val = int; + // We reserve an impossible Val ID as a sentinel + // NA meaning none, n/a, null, nil, etc. + static const Val NA = -1; + + // Ptr and UPtr are an index into the registers args[]. The two styles of using args are + // varyings and uniforms. Varyings use Ptr, have a stride associated with them, and are + // evaluated everytime through the loop. Uniforms use UPtr, don't have a stride, and are + // usually hoisted above the loop. + struct Ptr { int ix; }; + struct UPtr : public Ptr {}; + + bool operator!=(Ptr a, Ptr b); + + struct I32 { + Builder* builder = nullptr; + Val id = NA; + explicit operator bool() const { return id != NA; } + Builder* operator->() const { return builder; } + }; + + struct F32 { + Builder* builder = nullptr; + Val id = NA; + explicit operator bool() const { return id != NA; } + Builder* operator->() const { return builder; } + }; + + struct Color { + F32 r,g,b,a; + explicit operator bool() const { return r && g && b && a; } + Builder* operator->() const { return a.operator->(); } + }; + + struct HSLA { + F32 h,s,l,a; + explicit operator bool() const { return h && s && l && a; } + Builder* operator->() const { return a.operator->(); } + }; + + struct Coord { + F32 x,y; + explicit operator bool() const { return x && y; } + Builder* operator->() const { return x.operator->(); } + }; + + struct Uniform { + UPtr ptr; + int offset; + }; + struct Uniforms { + UPtr base; + std::vector buf; + + Uniforms(UPtr ptr, int init) : base(ptr), buf(init) {} + + Uniform push(int val) { + buf.push_back(val); + return {base, (int)( sizeof(int)*(buf.size() - 1) )}; + } + + Uniform pushF(float val) { + int bits; + memcpy(&bits, &val, sizeof(int)); + return this->push(bits); + } + + Uniform pushPtr(const void* ptr) { + // Jam the pointer into 1 or 2 ints. + int ints[sizeof(ptr) / sizeof(int)]; + memcpy(ints, &ptr, sizeof(ptr)); + for (int bits : ints) { + buf.push_back(bits); + } + return {base, (int)( sizeof(int)*(buf.size() - std::size(ints)) )}; + } + + Uniform pushArray(int32_t a[]) { + return this->pushPtr(a); + } + + Uniform pushArrayF(float a[]) { + return this->pushPtr(a); + } + }; + + struct PixelFormat { + enum { UNORM, SRGB, FLOAT, XRNG } encoding; + int r_bits, g_bits, b_bits, a_bits, + r_shift, g_shift, b_shift, a_shift; + }; + PixelFormat SkColorType_to_PixelFormat(SkColorType); + + SK_BEGIN_REQUIRE_DENSE + struct Instruction { + Op op; // v* = op(x,y,z,w,immA,immB), where * == index of this Instruction. + Val x,y,z,w; // Enough arguments for Op::store128. + int immA,immB,immC; // Immediate bit pattern, shift count, pointer index, byte offset, etc. + }; + SK_END_REQUIRE_DENSE + + bool operator==(const Instruction&, const Instruction&); + struct InstructionHash { + uint32_t operator()(const Instruction&, uint32_t seed=0) const; + }; + + struct OptimizedInstruction { + Op op; + Val x,y,z,w; + int immA,immB,immC; + + Val death; + bool can_hoist; + }; + + struct Features { + bool fma = false; + bool fp16 = false; + }; + + class Builder { + public: + Builder(bool createDuplicates = false); + Builder(Features, bool createDuplicates = false); + + Program done(const char* debug_name, + bool allow_jit, + std::unique_ptr visualizer) const; + Program done(const char* debug_name = nullptr, + bool allow_jit=true) const; + + // Mostly for debugging, tests, etc. + std::vector program() const { return fProgram; } + std::vector optimize(viz::Visualizer* visualizer = nullptr) const; + + // Returns a trace-hook ID which must be passed to the trace opcodes. + int attachTraceHook(SkSL::TraceHook*); + + // Convenience arg() wrappers for most common strides, sizeof(T) and 0. + template + Ptr varying() { return this->arg(sizeof(T)); } + Ptr varying(int stride) { SkASSERT(stride > 0); return this->arg(stride); } + UPtr uniform() { Ptr p = this->arg(0); return UPtr{{p.ix}}; } + + // TODO: allow uniform (i.e. Ptr) offsets to store* and load*? + // TODO: sign extension (signed types) for <32-bit loads? + // TODO: unsigned integer operations where relevant (just comparisons?)? + + // Assert cond is true, printing debug when not. + void assert_true(I32 cond, I32 debug); + void assert_true(I32 cond, F32 debug) { assert_true(cond, pun_to_I32(debug)); } + void assert_true(I32 cond) { assert_true(cond, cond); } + + // Insert debug traces into the instruction stream + bool mergeMasks(I32& mask, I32& traceMask); + void trace_line (int traceHookID, I32 mask, I32 traceMask, int line); + void trace_var (int traceHookID, I32 mask, I32 traceMask, int slot, I32 val); + void trace_enter(int traceHookID, I32 mask, I32 traceMask, int fnIdx); + void trace_exit (int traceHookID, I32 mask, I32 traceMask, int fnIdx); + void trace_scope(int traceHookID, I32 mask, I32 traceMask, int delta); + + // Store {8,16,32,64,128}-bit varying. + void store8 (Ptr ptr, I32 val); + void store16 (Ptr ptr, I32 val); + void store32 (Ptr ptr, I32 val); + void storeF (Ptr ptr, F32 val) { store32(ptr, pun_to_I32(val)); } + void store64 (Ptr ptr, I32 lo, I32 hi); // *ptr = lo|(hi<<32) + void store128(Ptr ptr, I32 x, I32 y, I32 z, I32 w); // *ptr = x|(y<<32)|(z<<64)|(w<<96) + + // Returns varying {n, n-1, n-2, ..., 1}, where n is the argument to Program::eval(). + I32 index(); + + // Load {8,16,32,64,128}-bit varying. + I32 load8 (Ptr ptr); + I32 load16 (Ptr ptr); + I32 load32 (Ptr ptr); + F32 loadF (Ptr ptr) { return pun_to_F32(load32(ptr)); } + I32 load64 (Ptr ptr, int lane); // Load 32-bit lane 0-1 of 64-bit value. + I32 load128(Ptr ptr, int lane); // Load 32-bit lane 0-3 of 128-bit value. + + // Load i32/f32 uniform with byte-count offset. + I32 uniform32(UPtr ptr, int offset); + F32 uniformF (UPtr ptr, int offset) { return pun_to_F32(uniform32(ptr,offset)); } + + // Load i32/f32 uniform with byte-count offset and an c-style array index. The address of + // the element is (*(ptr + byte-count offset))[index]. + I32 array32 (UPtr ptr, int offset, int index); + F32 arrayF (UPtr ptr, int offset, int index) { + return pun_to_F32(array32(ptr, offset, index)); + } + + // Push and load this color as a uniform. + Color uniformColor(SkColor4f, Uniforms*); + + // Gather u8,u16,i32 with varying element-count index from *(ptr + byte-count offset). + I32 gather8 (UPtr ptr, int offset, I32 index); + I32 gather16(UPtr ptr, int offset, I32 index); + I32 gather32(UPtr ptr, int offset, I32 index); + F32 gatherF (UPtr ptr, int offset, I32 index) { + return pun_to_F32(gather32(ptr, offset, index)); + } + + // Convenience methods for working with skvm::Uniform(s). + I32 uniform32(Uniform u) { return this->uniform32(u.ptr, u.offset); } + F32 uniformF (Uniform u) { return this->uniformF (u.ptr, u.offset); } + I32 gather8 (Uniform u, I32 index) { return this->gather8 (u.ptr, u.offset, index); } + I32 gather16 (Uniform u, I32 index) { return this->gather16 (u.ptr, u.offset, index); } + I32 gather32 (Uniform u, I32 index) { return this->gather32 (u.ptr, u.offset, index); } + F32 gatherF (Uniform u, I32 index) { return this->gatherF (u.ptr, u.offset, index); } + + // Convenience methods for working with array pointers in skvm::Uniforms. Index is an + // array index and not a byte offset. The array pointer is stored at u. + I32 array32 (Uniform a, int index) { return this->array32 (a.ptr, a.offset, index); } + F32 arrayF (Uniform a, int index) { return this->arrayF (a.ptr, a.offset, index); } + + // Load an immediate constant. + I32 splat(int n); + I32 splat(unsigned u) { return splat((int)u); } + F32 splat(float f) { + int bits; + memcpy(&bits, &f, 4); + return pun_to_F32(splat(bits)); + } + + // Some operations make sense with immediate arguments, + // so we provide overloads inline to make that seamless. + // + // We omit overloads that may indicate a bug or performance issue. + // In general it does not make sense to pass immediates to unary operations, + // and even sometimes not for binary operations, e.g. + // + // div(x, y) -- normal every day divide + // div(3.0f, y) -- yep, makes sense + // div(x, 3.0f) -- omitted as a reminder you probably want mul(x, 1/3.0f). + // + // You can of course always splat() to override these opinions. + + // float math, comparisons, etc. + F32 add(F32, F32); + F32 add(F32 x, float y) { return add(x, splat(y)); } + F32 add(float x, F32 y) { return add(splat(x), y); } + + F32 sub(F32, F32); + F32 sub(F32 x, float y) { return sub(x, splat(y)); } + F32 sub(float x, F32 y) { return sub(splat(x), y); } + + F32 mul(F32, F32); + F32 mul(F32 x, float y) { return mul(x, splat(y)); } + F32 mul(float x, F32 y) { return mul(splat(x), y); } + + // mul(), but allowing optimizations not strictly legal under IEEE-754 rules. + F32 fast_mul(F32, F32); + F32 fast_mul(F32 x, float y) { return fast_mul(x, splat(y)); } + F32 fast_mul(float x, F32 y) { return fast_mul(splat(x), y); } + + F32 div(F32, F32); + F32 div(float x, F32 y) { return div(splat(x), y); } + + F32 min(F32, F32); + F32 min(F32 x, float y) { return min(x, splat(y)); } + F32 min(float x, F32 y) { return min(splat(x), y); } + + F32 max(F32, F32); + F32 max(F32 x, float y) { return max(x, splat(y)); } + F32 max(float x, F32 y) { return max(splat(x), y); } + + // TODO: remove mad()? It's just sugar. + F32 mad(F32 x, F32 y, F32 z) { return add(mul(x,y), z); } + F32 mad(F32 x, F32 y, float z) { return mad( x , y , splat(z)); } + F32 mad(F32 x, float y, F32 z) { return mad( x , splat(y), z ); } + F32 mad(F32 x, float y, float z) { return mad( x , splat(y), splat(z)); } + F32 mad(float x, F32 y, F32 z) { return mad(splat(x), y , z ); } + F32 mad(float x, F32 y, float z) { return mad(splat(x), y , splat(z)); } + F32 mad(float x, float y, F32 z) { return mad(splat(x), splat(y), z ); } + + F32 sqrt(F32); + F32 approx_log2(F32); + F32 approx_pow2(F32); + F32 approx_log (F32 x) { return mul(0.69314718f, approx_log2(x)); } + F32 approx_exp (F32 x) { return approx_pow2(mul(x, 1.4426950408889634074f)); } + + F32 approx_powf(F32 base, F32 exp); + F32 approx_powf(F32 base, float exp) { return approx_powf(base, splat(exp)); } + F32 approx_powf(float base, F32 exp) { return approx_powf(splat(base), exp); } + + + F32 approx_sin(F32 radians); + F32 approx_cos(F32 radians) { return approx_sin(add(radians, SK_ScalarPI/2)); } + F32 approx_tan(F32 radians); + + F32 approx_asin(F32 x); + F32 approx_acos(F32 x) { return sub(SK_ScalarPI/2, approx_asin(x)); } + F32 approx_atan(F32 x); + F32 approx_atan2(F32 y, F32 x); + + F32 lerp(F32 lo, F32 hi, F32 t); + F32 lerp(F32 lo, F32 hi, float t) { return lerp( lo , hi , splat(t)); } + F32 lerp(F32 lo, float hi, float t) { return lerp( lo , splat(hi), splat(t)); } + F32 lerp(F32 lo, float hi, F32 t) { return lerp( lo , splat(hi), t ); } + F32 lerp(float lo, F32 hi, F32 t) { return lerp(splat(lo), hi , t ); } + F32 lerp(float lo, F32 hi, float t) { return lerp(splat(lo), hi , splat(t)); } + F32 lerp(float lo, float hi, F32 t) { return lerp(splat(lo), splat(hi), t ); } + + F32 clamp(F32 x, F32 lo, F32 hi) { return max(lo, min(x, hi)); } + F32 clamp(F32 x, F32 lo, float hi) { return clamp( x , lo , splat(hi)); } + F32 clamp(F32 x, float lo, float hi) { return clamp( x , splat(lo), splat(hi)); } + F32 clamp(F32 x, float lo, F32 hi) { return clamp( x , splat(lo), hi ); } + F32 clamp(float x, F32 lo, F32 hi) { return clamp(splat(x), lo , hi ); } + F32 clamp(float x, F32 lo, float hi) { return clamp(splat(x), lo , splat(hi)); } + F32 clamp(float x, float lo, F32 hi) { return clamp(splat(x), splat(lo), hi ); } + + F32 clamp01(F32 x) { return clamp(x, 0.0f, 1.0f); } + + F32 abs(F32 x) { return pun_to_F32(bit_and(pun_to_I32(x), 0x7fff'ffff)); } + F32 fract(F32 x) { return sub(x, floor(x)); } + F32 ceil(F32); + F32 floor(F32); + I32 is_NaN (F32 x) { return neq(x,x); } + I32 is_finite(F32 x) { return lt(bit_and(pun_to_I32(x), 0x7f80'0000), 0x7f80'0000); } + + I32 trunc(F32 x); + I32 round(F32 x); // Round to int using current rounding mode (as if lrintf()). + I32 pun_to_I32(F32 x) { return {x.builder, x.id}; } + + I32 to_fp16(F32 x); + F32 from_fp16(I32 x); + + I32 eq(F32, F32); + I32 eq(F32 x, float y) { return eq(x, splat(y)); } + I32 eq(float x, F32 y) { return eq(splat(x), y); } + + I32 neq(F32, F32); + I32 neq(F32 x, float y) { return neq(x, splat(y)); } + I32 neq(float x, F32 y) { return neq(splat(x), y); } + + I32 lt(F32, F32); + I32 lt(F32 x, float y) { return lt(x, splat(y)); } + I32 lt(float x, F32 y) { return lt(splat(x), y); } + + I32 lte(F32, F32); + I32 lte(F32 x, float y) { return lte(x, splat(y)); } + I32 lte(float x, F32 y) { return lte(splat(x), y); } + + I32 gt(F32, F32); + I32 gt(F32 x, float y) { return gt(x, splat(y)); } + I32 gt(float x, F32 y) { return gt(splat(x), y); } + + I32 gte(F32, F32); + I32 gte(F32 x, float y) { return gte(x, splat(y)); } + I32 gte(float x, F32 y) { return gte(splat(x), y); } + + // int math, comparisons, etc. + I32 add(I32, I32); + I32 add(I32 x, int y) { return add(x, splat(y)); } + I32 add(int x, I32 y) { return add(splat(x), y); } + + I32 sub(I32, I32); + I32 sub(I32 x, int y) { return sub(x, splat(y)); } + I32 sub(int x, I32 y) { return sub(splat(x), y); } + + I32 mul(I32, I32); + I32 mul(I32 x, int y) { return mul(x, splat(y)); } + I32 mul(int x, I32 y) { return mul(splat(x), y); } + + I32 shl(I32 x, int bits); + I32 shr(I32 x, int bits); + I32 sra(I32 x, int bits); + + I32 eq(I32, I32); + I32 eq(I32 x, int y) { return eq(x, splat(y)); } + I32 eq(int x, I32 y) { return eq(splat(x), y); } + + I32 neq(I32, I32); + I32 neq(I32 x, int y) { return neq(x, splat(y)); } + I32 neq(int x, I32 y) { return neq(splat(x), y); } + + I32 lt(I32, I32); + I32 lt(I32 x, int y) { return lt(x, splat(y)); } + I32 lt(int x, I32 y) { return lt(splat(x), y); } + + I32 lte(I32, I32); + I32 lte(I32 x, int y) { return lte(x, splat(y)); } + I32 lte(int x, I32 y) { return lte(splat(x), y); } + + I32 gt(I32, I32); + I32 gt(I32 x, int y) { return gt(x, splat(y)); } + I32 gt(int x, I32 y) { return gt(splat(x), y); } + + I32 gte(I32, I32); + I32 gte(I32 x, int y) { return gte(x, splat(y)); } + I32 gte(int x, I32 y) { return gte(splat(x), y); } + + F32 to_F32(I32 x); + F32 pun_to_F32(I32 x) { return {x.builder, x.id}; } + + // Bitwise operations. + I32 bit_and(I32, I32); + I32 bit_and(I32 x, int y) { return bit_and(x, splat(y)); } + I32 bit_and(int x, I32 y) { return bit_and(splat(x), y); } + + I32 bit_or(I32, I32); + I32 bit_or(I32 x, int y) { return bit_or(x, splat(y)); } + I32 bit_or(int x, I32 y) { return bit_or(splat(x), y); } + + I32 bit_xor(I32, I32); + I32 bit_xor(I32 x, int y) { return bit_xor(x, splat(y)); } + I32 bit_xor(int x, I32 y) { return bit_xor(splat(x), y); } + + I32 bit_clear(I32, I32); + I32 bit_clear(I32 x, int y) { return bit_clear(x, splat(y)); } + I32 bit_clear(int x, I32 y) { return bit_clear(splat(x), y); } + + I32 min(I32 x, I32 y) { return select(lte(x,y), x, y); } + I32 min(I32 x, int y) { return min(x, splat(y)); } + I32 min(int x, I32 y) { return min(splat(x), y); } + + I32 max(I32 x, I32 y) { return select(gte(x,y), x, y); } + I32 max(I32 x, int y) { return max(x, splat(y)); } + I32 max(int x, I32 y) { return max(splat(x), y); } + + I32 select(I32 cond, I32 t, I32 f); // cond ? t : f + I32 select(I32 cond, int t, I32 f) { return select(cond, splat(t), f ); } + I32 select(I32 cond, I32 t, int f) { return select(cond, t , splat(f)); } + I32 select(I32 cond, int t, int f) { return select(cond, splat(t), splat(f)); } + + F32 select(I32 cond, F32 t, F32 f) { + return pun_to_F32(select(cond, pun_to_I32(t) + , pun_to_I32(f))); + } + F32 select(I32 cond, float t, F32 f) { return select(cond, splat(t), f ); } + F32 select(I32 cond, F32 t, float f) { return select(cond, t , splat(f)); } + F32 select(I32 cond, float t, float f) { return select(cond, splat(t), splat(f)); } + + I32 extract(I32 x, int bits, I32 z); // (x>>bits) & z + I32 extract(I32 x, int bits, int z) { return extract(x, bits, splat(z)); } + I32 extract(int x, int bits, I32 z) { return extract(splat(x), bits, z); } + + I32 pack(I32 x, I32 y, int bits); // x | (y< x * (1/255.0f) + I32 to_unorm(int bits, F32); // E.g. to_unorm(8, x) -> round(x * 255) + + Color load(PixelFormat, Ptr ptr); + void store(PixelFormat, Ptr ptr, Color); + Color gather(PixelFormat, UPtr ptr, int offset, I32 index); + Color gather(PixelFormat f, Uniform u, I32 index) { + return gather(f, u.ptr, u.offset, index); + } + + void premul(F32* r, F32* g, F32* b, F32 a); + void unpremul(F32* r, F32* g, F32* b, F32 a); + + Color premul(Color c) { this->premul(&c.r, &c.g, &c.b, c.a); return c; } + Color unpremul(Color c) { this->unpremul(&c.r, &c.g, &c.b, c.a); return c; } + + Color lerp(Color lo, Color hi, F32 t); + Color blend(SkBlendMode, Color src, Color dst); + + Color clamp01(Color c) { + return { clamp01(c.r), clamp01(c.g), clamp01(c.b), clamp01(c.a) }; + } + + HSLA to_hsla(Color); + Color to_rgba(HSLA); + + void dump(SkWStream* = nullptr) const; + + uint64_t hash() const; + + Val push(Instruction); + + bool allImm() const { return true; } + + template + bool allImm(Val id, T* imm, Rest... rest) const { + if (fProgram[id].op == Op::splat) { + static_assert(sizeof(T) == 4); + memcpy(imm, &fProgram[id].immA, 4); + return this->allImm(rest...); + } + return false; + } + + bool allUniform() const { return true; } + + template + bool allUniform(Val id, Uniform* uni, Rest... rest) const { + if (fProgram[id].op == Op::uniform32) { + uni->ptr.ix = fProgram[id].immA; + uni->offset = fProgram[id].immB; + return this->allUniform(rest...); + } + return false; + } + + private: + // Declare an argument with given stride (use stride=0 for uniforms). + Ptr arg(int stride); + + Val push( + Op op, Val x=NA, Val y=NA, Val z=NA, Val w=NA, int immA=0, int immB=0, int immC=0) { + return this->push(Instruction{op, x,y,z,w, immA,immB,immC}); + } + + template + bool isImm(Val id, T want) const { + T imm = 0; + return this->allImm(id, &imm) && imm == want; + } + + // `canonicalizeIdOrder` and has two rules: + // - Immediate values go last; that is, `x + 1` is preferred over `1 + x`. + // - If both/neither of x and y are immediate, lower IDs go before higher IDs. + // Canonicalizing the IDs helps with opcode deduplication. Putting immediates in a + // consistent position makes it easier to detect no-op arithmetic like `x + 0`. + template + void canonicalizeIdOrder(F32_or_I32& x, F32_or_I32& y); + + // If the passed in ID is a bit-not, return the value being bit-notted. Otherwise, NA. + Val holdsBitNot(Val id); + + SkTHashMap fIndex; + std::vector fProgram; + std::vector fTraceHooks; + std::vector fStrides; + const Features fFeatures; + bool fCreateDuplicates; + }; + + // Optimization passes and data structures normally used by Builder::optimize(), + // extracted here so they can be unit tested. + std::vector eliminate_dead_code(std::vector, + viz::Visualizer* visualizer = nullptr); + std::vector finalize(std::vector, + viz::Visualizer* visualizer = nullptr); + + using Reg = int; + + // d = op(x,y,z,w, immA,immB) + struct InterpreterInstruction { + Op op; + Reg d,x,y,z,w; + int immA,immB,immC; + }; + + class Program { + public: + Program(const std::vector& instructions, + std::unique_ptr visualizer, + const std::vector& strides, + const std::vector& traceHooks, + const char* debug_name, bool allow_jit); + + Program(); + ~Program(); + + Program(Program&&); + Program& operator=(Program&&); + + Program(const Program&) = delete; + Program& operator=(const Program&) = delete; + + void eval(int n, void* args[]) const; + + template + void eval(int n, T*... arg) const { + SkASSERT(sizeof...(arg) == this->nargs()); + // This nullptr isn't important except that it makes args[] non-empty if you pass none. + void* args[] = { (void*)arg..., nullptr }; + this->eval(n, args); + } + + std::vector instructions() const; + int nargs() const; + int nregs() const; + int loop () const; + bool empty() const; + + bool hasJIT() const; // Has this Program been JITted? + bool hasTraceHooks() const; // Is this program instrumented for debugging? + + void visualize(SkWStream* output) const; + void dump(SkWStream* = nullptr) const; + void disassemble(SkWStream* = nullptr) const; + viz::Visualizer* visualizer(); + + private: + void setupInterpreter(const std::vector&); + void setupJIT (const std::vector&, const char* debug_name); + + bool jit(const std::vector&, + int* stack_hint, uint32_t* registers_used, + Assembler*) const; + + void dropJIT(); + + struct Impl; + std::unique_ptr fImpl; + }; + + // TODO: control flow + // TODO: 64-bit values? + +#define SI static inline + + SI I32 operator+(I32 x, I32 y) { return x->add(x,y); } + SI I32 operator+(I32 x, int y) { return x->add(x,y); } + SI I32 operator+(int x, I32 y) { return y->add(x,y); } + + SI I32 operator-(I32 x, I32 y) { return x->sub(x,y); } + SI I32 operator-(I32 x, int y) { return x->sub(x,y); } + SI I32 operator-(int x, I32 y) { return y->sub(x,y); } + + SI I32 operator*(I32 x, I32 y) { return x->mul(x,y); } + SI I32 operator*(I32 x, int y) { return x->mul(x,y); } + SI I32 operator*(int x, I32 y) { return y->mul(x,y); } + + SI I32 min(I32 x, I32 y) { return x->min(x,y); } + SI I32 min(I32 x, int y) { return x->min(x,y); } + SI I32 min(int x, I32 y) { return y->min(x,y); } + + SI I32 max(I32 x, I32 y) { return x->max(x,y); } + SI I32 max(I32 x, int y) { return x->max(x,y); } + SI I32 max(int x, I32 y) { return y->max(x,y); } + + SI I32 operator==(I32 x, I32 y) { return x->eq(x,y); } + SI I32 operator==(I32 x, int y) { return x->eq(x,y); } + SI I32 operator==(int x, I32 y) { return y->eq(x,y); } + + SI I32 operator!=(I32 x, I32 y) { return x->neq(x,y); } + SI I32 operator!=(I32 x, int y) { return x->neq(x,y); } + SI I32 operator!=(int x, I32 y) { return y->neq(x,y); } + + SI I32 operator< (I32 x, I32 y) { return x->lt(x,y); } + SI I32 operator< (I32 x, int y) { return x->lt(x,y); } + SI I32 operator< (int x, I32 y) { return y->lt(x,y); } + + SI I32 operator<=(I32 x, I32 y) { return x->lte(x,y); } + SI I32 operator<=(I32 x, int y) { return x->lte(x,y); } + SI I32 operator<=(int x, I32 y) { return y->lte(x,y); } + + SI I32 operator> (I32 x, I32 y) { return x->gt(x,y); } + SI I32 operator> (I32 x, int y) { return x->gt(x,y); } + SI I32 operator> (int x, I32 y) { return y->gt(x,y); } + + SI I32 operator>=(I32 x, I32 y) { return x->gte(x,y); } + SI I32 operator>=(I32 x, int y) { return x->gte(x,y); } + SI I32 operator>=(int x, I32 y) { return y->gte(x,y); } + + + SI F32 operator+(F32 x, F32 y) { return x->add(x,y); } + SI F32 operator+(F32 x, float y) { return x->add(x,y); } + SI F32 operator+(float x, F32 y) { return y->add(x,y); } + + SI F32 operator-(F32 x, F32 y) { return x->sub(x,y); } + SI F32 operator-(F32 x, float y) { return x->sub(x,y); } + SI F32 operator-(float x, F32 y) { return y->sub(x,y); } + + SI F32 operator*(F32 x, F32 y) { return x->mul(x,y); } + SI F32 operator*(F32 x, float y) { return x->mul(x,y); } + SI F32 operator*(float x, F32 y) { return y->mul(x,y); } + + SI F32 fast_mul(F32 x, F32 y) { return x->fast_mul(x,y); } + SI F32 fast_mul(F32 x, float y) { return x->fast_mul(x,y); } + SI F32 fast_mul(float x, F32 y) { return y->fast_mul(x,y); } + + SI F32 operator/(F32 x, F32 y) { return x->div(x,y); } + SI F32 operator/(float x, F32 y) { return y->div(x,y); } + + SI F32 min(F32 x, F32 y) { return x->min(x,y); } + SI F32 min(F32 x, float y) { return x->min(x,y); } + SI F32 min(float x, F32 y) { return y->min(x,y); } + + SI F32 max(F32 x, F32 y) { return x->max(x,y); } + SI F32 max(F32 x, float y) { return x->max(x,y); } + SI F32 max(float x, F32 y) { return y->max(x,y); } + + SI I32 operator==(F32 x, F32 y) { return x->eq(x,y); } + SI I32 operator==(F32 x, float y) { return x->eq(x,y); } + SI I32 operator==(float x, F32 y) { return y->eq(x,y); } + + SI I32 operator!=(F32 x, F32 y) { return x->neq(x,y); } + SI I32 operator!=(F32 x, float y) { return x->neq(x,y); } + SI I32 operator!=(float x, F32 y) { return y->neq(x,y); } + + SI I32 operator< (F32 x, F32 y) { return x->lt(x,y); } + SI I32 operator< (F32 x, float y) { return x->lt(x,y); } + SI I32 operator< (float x, F32 y) { return y->lt(x,y); } + + SI I32 operator<=(F32 x, F32 y) { return x->lte(x,y); } + SI I32 operator<=(F32 x, float y) { return x->lte(x,y); } + SI I32 operator<=(float x, F32 y) { return y->lte(x,y); } + + SI I32 operator> (F32 x, F32 y) { return x->gt(x,y); } + SI I32 operator> (F32 x, float y) { return x->gt(x,y); } + SI I32 operator> (float x, F32 y) { return y->gt(x,y); } + + SI I32 operator>=(F32 x, F32 y) { return x->gte(x,y); } + SI I32 operator>=(F32 x, float y) { return x->gte(x,y); } + SI I32 operator>=(float x, F32 y) { return y->gte(x,y); } + + SI I32& operator+=(I32& x, I32 y) { return (x = x + y); } + SI I32& operator+=(I32& x, int y) { return (x = x + y); } + + SI I32& operator-=(I32& x, I32 y) { return (x = x - y); } + SI I32& operator-=(I32& x, int y) { return (x = x - y); } + + SI I32& operator*=(I32& x, I32 y) { return (x = x * y); } + SI I32& operator*=(I32& x, int y) { return (x = x * y); } + + SI F32& operator+=(F32& x, F32 y) { return (x = x + y); } + SI F32& operator+=(F32& x, float y) { return (x = x + y); } + + SI F32& operator-=(F32& x, F32 y) { return (x = x - y); } + SI F32& operator-=(F32& x, float y) { return (x = x - y); } + + SI F32& operator*=(F32& x, F32 y) { return (x = x * y); } + SI F32& operator*=(F32& x, float y) { return (x = x * y); } + + SI F32& operator/=(F32& x, F32 y) { return (x = x / y); } + + SI void assert_true(I32 cond, I32 debug) { cond->assert_true(cond,debug); } + SI void assert_true(I32 cond, F32 debug) { cond->assert_true(cond,debug); } + SI void assert_true(I32 cond) { cond->assert_true(cond); } + + SI void store8 (Ptr ptr, I32 val) { val->store8 (ptr, val); } + SI void store16 (Ptr ptr, I32 val) { val->store16 (ptr, val); } + SI void store32 (Ptr ptr, I32 val) { val->store32 (ptr, val); } + SI void storeF (Ptr ptr, F32 val) { val->storeF (ptr, val); } + SI void store64 (Ptr ptr, I32 lo, I32 hi) { lo ->store64 (ptr, lo,hi); } + SI void store128(Ptr ptr, I32 x, I32 y, I32 z, I32 w) { x ->store128(ptr, x,y,z,w); } + + SI I32 gather8 (UPtr ptr, int off, I32 ix) { return ix->gather8 (ptr, off, ix); } + SI I32 gather16(UPtr ptr, int off, I32 ix) { return ix->gather16(ptr, off, ix); } + SI I32 gather32(UPtr ptr, int off, I32 ix) { return ix->gather32(ptr, off, ix); } + SI F32 gatherF (UPtr ptr, int off, I32 ix) { return ix->gatherF (ptr, off, ix); } + + SI I32 gather8 (Uniform u, I32 ix) { return ix->gather8 (u, ix); } + SI I32 gather16(Uniform u, I32 ix) { return ix->gather16(u, ix); } + SI I32 gather32(Uniform u, I32 ix) { return ix->gather32(u, ix); } + SI F32 gatherF (Uniform u, I32 ix) { return ix->gatherF (u, ix); } + + SI F32 sqrt(F32 x) { return x-> sqrt(x); } + SI F32 approx_log2(F32 x) { return x->approx_log2(x); } + SI F32 approx_pow2(F32 x) { return x->approx_pow2(x); } + SI F32 approx_log (F32 x) { return x->approx_log (x); } + SI F32 approx_exp (F32 x) { return x->approx_exp (x); } + + SI F32 approx_powf(F32 base, F32 exp) { return base->approx_powf(base, exp); } + SI F32 approx_powf(F32 base, float exp) { return base->approx_powf(base, exp); } + SI F32 approx_powf(float base, F32 exp) { return exp->approx_powf(base, exp); } + + SI F32 approx_sin(F32 radians) { return radians->approx_sin(radians); } + SI F32 approx_cos(F32 radians) { return radians->approx_cos(radians); } + SI F32 approx_tan(F32 radians) { return radians->approx_tan(radians); } + + SI F32 approx_asin(F32 x) { return x->approx_asin(x); } + SI F32 approx_acos(F32 x) { return x->approx_acos(x); } + SI F32 approx_atan(F32 x) { return x->approx_atan(x); } + SI F32 approx_atan2(F32 y, F32 x) { return x->approx_atan2(y, x); } + + SI F32 clamp01(F32 x) { return x-> clamp01(x); } + SI F32 abs(F32 x) { return x-> abs(x); } + SI F32 ceil(F32 x) { return x-> ceil(x); } + SI F32 fract(F32 x) { return x-> fract(x); } + SI F32 floor(F32 x) { return x-> floor(x); } + SI I32 is_NaN(F32 x) { return x-> is_NaN(x); } + SI I32 is_finite(F32 x) { return x->is_finite(x); } + + SI I32 trunc(F32 x) { return x-> trunc(x); } + SI I32 round(F32 x) { return x-> round(x); } + SI I32 pun_to_I32(F32 x) { return x-> pun_to_I32(x); } + SI F32 pun_to_F32(I32 x) { return x-> pun_to_F32(x); } + SI F32 to_F32(I32 x) { return x-> to_F32(x); } + SI I32 to_fp16(F32 x) { return x-> to_fp16(x); } + SI F32 from_fp16(I32 x) { return x-> from_fp16(x); } + + SI F32 lerp(F32 lo, F32 hi, F32 t) { return lo->lerp(lo,hi,t); } + SI F32 lerp(F32 lo, F32 hi, float t) { return lo->lerp(lo,hi,t); } + SI F32 lerp(F32 lo, float hi, F32 t) { return lo->lerp(lo,hi,t); } + SI F32 lerp(F32 lo, float hi, float t) { return lo->lerp(lo,hi,t); } + SI F32 lerp(float lo, F32 hi, F32 t) { return hi->lerp(lo,hi,t); } + SI F32 lerp(float lo, F32 hi, float t) { return hi->lerp(lo,hi,t); } + SI F32 lerp(float lo, float hi, F32 t) { return t->lerp(lo,hi,t); } + + SI F32 clamp(F32 x, F32 lo, F32 hi) { return x->clamp(x,lo,hi); } + SI F32 clamp(F32 x, F32 lo, float hi) { return x->clamp(x,lo,hi); } + SI F32 clamp(F32 x, float lo, F32 hi) { return x->clamp(x,lo,hi); } + SI F32 clamp(F32 x, float lo, float hi) { return x->clamp(x,lo,hi); } + SI F32 clamp(float x, F32 lo, F32 hi) { return lo->clamp(x,lo,hi); } + SI F32 clamp(float x, F32 lo, float hi) { return lo->clamp(x,lo,hi); } + SI F32 clamp(float x, float lo, F32 hi) { return hi->clamp(x,lo,hi); } + + SI I32 operator<<(I32 x, int bits) { return x->shl(x, bits); } + SI I32 shl(I32 x, int bits) { return x->shl(x, bits); } + SI I32 shr(I32 x, int bits) { return x->shr(x, bits); } + SI I32 sra(I32 x, int bits) { return x->sra(x, bits); } + + SI I32 operator&(I32 x, I32 y) { return x->bit_and(x,y); } + SI I32 operator&(I32 x, int y) { return x->bit_and(x,y); } + SI I32 operator&(int x, I32 y) { return y->bit_and(x,y); } + + SI I32 operator|(I32 x, I32 y) { return x->bit_or (x,y); } + SI I32 operator|(I32 x, int y) { return x->bit_or (x,y); } + SI I32 operator|(int x, I32 y) { return y->bit_or (x,y); } + + SI I32 operator^(I32 x, I32 y) { return x->bit_xor(x,y); } + SI I32 operator^(I32 x, int y) { return x->bit_xor(x,y); } + SI I32 operator^(int x, I32 y) { return y->bit_xor(x,y); } + + SI I32& operator&=(I32& x, I32 y) { return (x = x & y); } + SI I32& operator&=(I32& x, int y) { return (x = x & y); } + SI I32& operator|=(I32& x, I32 y) { return (x = x | y); } + SI I32& operator|=(I32& x, int y) { return (x = x | y); } + SI I32& operator^=(I32& x, I32 y) { return (x = x ^ y); } + SI I32& operator^=(I32& x, int y) { return (x = x ^ y); } + + SI I32 bit_clear(I32 x, I32 y) { return x->bit_clear(x,y); } + SI I32 bit_clear(I32 x, int y) { return x->bit_clear(x,y); } + SI I32 bit_clear(int x, I32 y) { return y->bit_clear(x,y); } + + SI I32 select(I32 c, I32 t, I32 f) { return c->select(c, t , f ); } + SI I32 select(I32 c, I32 t, int f) { return c->select(c, t , c->splat(f)); } + SI I32 select(I32 c, int t, I32 f) { return c->select(c, c->splat(t), f ); } + SI I32 select(I32 c, int t, int f) { return c->select(c, c->splat(t), c->splat(f)); } + + SI F32 select(I32 c, F32 t, F32 f) { return c->select(c, t , f ); } + SI F32 select(I32 c, F32 t, float f) { return c->select(c, t , c->splat(f)); } + SI F32 select(I32 c, float t, F32 f) { return c->select(c, c->splat(t), f ); } + SI F32 select(I32 c, float t, float f) { return c->select(c, c->splat(t), c->splat(f)); } + + SI I32 extract(I32 x, int bits, I32 z) { return x->extract(x,bits,z); } + SI I32 extract(I32 x, int bits, int z) { return x->extract(x,bits,z); } + SI I32 extract(int x, int bits, I32 z) { return z->extract(x,bits,z); } + + SI I32 pack(I32 x, I32 y, int bits) { return x->pack (x,y,bits); } + SI I32 pack(I32 x, int y, int bits) { return x->pack (x,y,bits); } + SI I32 pack(int x, I32 y, int bits) { return y->pack (x,y,bits); } + + SI I32 operator~(I32 x) { return ~0 ^ x; } + SI I32 operator-(I32 x) { return 0 - x; } + SI F32 operator-(F32 x) { return 0.0f - x; } + + SI F32 from_unorm(int bits, I32 x) { return x->from_unorm(bits,x); } + SI I32 to_unorm(int bits, F32 x) { return x-> to_unorm(bits,x); } + + SI void store(PixelFormat f, Ptr p, Color c) { return c->store(f,p,c); } + + SI Color gather(PixelFormat f, UPtr p, int off, I32 ix) { return ix->gather(f,p,off,ix); } + SI Color gather(PixelFormat f, Uniform u , I32 ix) { return ix->gather(f,u,ix); } + + SI void premul(F32* r, F32* g, F32* b, F32 a) { a-> premul(r,g,b,a); } + SI void unpremul(F32* r, F32* g, F32* b, F32 a) { a->unpremul(r,g,b,a); } + + SI Color premul(Color c) { return c-> premul(c); } + SI Color unpremul(Color c) { return c->unpremul(c); } + + SI Color lerp(Color lo, Color hi, F32 t) { return t->lerp(lo,hi,t); } + + SI Color blend(SkBlendMode m, Color s, Color d) { return s->blend(m,s,d); } + + SI Color clamp01(Color c) { return c->clamp01(c); } + + SI HSLA to_hsla(Color c) { return c->to_hsla(c); } + SI Color to_rgba(HSLA c) { return c->to_rgba(c); } + + // Evaluate polynomials: ax^n + bx^(n-1) + ... for n >= 1 + template + SI F32 poly(F32 x, F32_or_float a, float b, Rest... rest) { + if constexpr (sizeof...(rest) == 0) { + return x*a+b; + } else { + return poly(x, x*a+b, rest...); + } + } +#undef SI +} // namespace skvm + +#endif//SkVM_DEFINED diff --git a/gfx/skia/skia/src/core/SkVMBlitter.cpp b/gfx/skia/skia/src/core/SkVMBlitter.cpp new file mode 100644 index 0000000000..4b0702666f --- /dev/null +++ b/gfx/skia/skia/src/core/SkVMBlitter.cpp @@ -0,0 +1,815 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkMacros.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkCoreBlitters.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkLRUCache.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkOpts.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkVMBlitter.h" +#include "src/shaders/SkColorFilterShader.h" + +#include + +#define SK_BLITTER_TRACE_IS_SKVM +#include "src/utils/SkBlitterTrace.h" + +namespace { + + // Uniforms set by the Blitter itself, + // rather than by the Shader, which follow this struct in the skvm::Uniforms buffer. + struct BlitterUniforms { + int right; // First device x + blit run length n, used to get device x coordinate. + int y; // Device y coordinate. + }; + static_assert(SkIsAlign4(sizeof(BlitterUniforms)), ""); + inline static constexpr int kBlitterUniformsCount = sizeof(BlitterUniforms) / 4; + + static skvm::Coord device_coord(skvm::Builder* p, skvm::Uniforms* uniforms) { + skvm::I32 dx = p->uniform32(uniforms->base, offsetof(BlitterUniforms, right)) + - p->index(), + dy = p->uniform32(uniforms->base, offsetof(BlitterUniforms, y)); + return { + to_F32(dx) + 0.5f, + to_F32(dy) + 0.5f, + }; + } + + struct NoopColorFilter final : public SkColorFilterBase { + skvm::Color onProgram(skvm::Builder*, skvm::Color c, + const SkColorInfo&, skvm::Uniforms*, SkArenaAlloc*) const override { + return c; + } + + bool appendStages(const SkStageRec&, bool) const override { return true; } + + // Only created here, should never be flattened / unflattened. + Factory getFactory() const override { return nullptr; } + const char* getTypeName() const override { return "NoopColorFilter"; } + }; + + struct SpriteShader : public SkShaderBase { + explicit SpriteShader(SkPixmap sprite) : fSprite(sprite) {} + + SkPixmap fSprite; + + // Only created here temporarily... never serialized. + Factory getFactory() const override { return nullptr; } + const char* getTypeName() const override { return "SpriteShader"; } + + bool isOpaque() const override { return fSprite.isOpaque(); } + + skvm::Color program(skvm::Builder* p, + skvm::Coord /*device*/, + skvm::Coord /*local*/, + skvm::Color /*paint*/, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const override { + const SkColorType ct = fSprite.colorType(); + + skvm::PixelFormat fmt = skvm::SkColorType_to_PixelFormat(ct); + + skvm::Color c = p->load(fmt, p->varying(SkColorTypeBytesPerPixel(ct))); + + return SkColorSpaceXformSteps{fSprite, dst}.program(p, uniforms, c); + } + }; + + struct DitherShader : public SkShaderBase { + explicit DitherShader(sk_sp shader) : fShader(std::move(shader)) {} + + sk_sp fShader; + + // Only created here temporarily... never serialized. + Factory getFactory() const override { return nullptr; } + const char* getTypeName() const override { return "DitherShader"; } + + bool isOpaque() const override { return fShader->isOpaque(); } + + skvm::Color program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override { + // Run our wrapped shader. + skvm::Color c = as_SB(fShader)->program(p, + device, + local, + paint, + mRec, + dst, + uniforms, + alloc); + if (!c) { + return {}; + } + + float rate = 0.0f; + switch (dst.colorType()) { + case kARGB_4444_SkColorType: + rate = 1 / 15.0f; + break; + case kRGB_565_SkColorType: + rate = 1 / 63.0f; + break; + case kGray_8_SkColorType: + case kRGB_888x_SkColorType: + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + case kSRGBA_8888_SkColorType: + case kR8_unorm_SkColorType: + rate = 1 / 255.0f; + break; + case kRGB_101010x_SkColorType: + case kRGBA_1010102_SkColorType: + case kBGR_101010x_SkColorType: + case kBGRA_1010102_SkColorType: + rate = 1 / 1023.0f; + break; + + case kUnknown_SkColorType: + case kAlpha_8_SkColorType: + case kBGR_101010x_XR_SkColorType: + case kRGBA_F16_SkColorType: + case kRGBA_F16Norm_SkColorType: + case kRGBA_F32_SkColorType: + case kR8G8_unorm_SkColorType: + case kA16_float_SkColorType: + case kA16_unorm_SkColorType: + case kR16G16_float_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16B16A16_unorm_SkColorType: + return c; + } + + // See SkRasterPipeline dither stage. + // This is 8x8 ordered dithering. From here we'll only need dx and dx^dy. + SkASSERT(local.x.id == device.x.id); + SkASSERT(local.y.id == device.y.id); + skvm::I32 X = trunc(device.x - 0.5f), + Y = X ^ trunc(device.y - 0.5f); + + // If X's low bits are abc and Y's def, M is fcebda, + // 6 bits producing all values [0,63] shuffled over an 8x8 grid. + skvm::I32 M = shl(Y & 1, 5) + | shl(X & 1, 4) + | shl(Y & 2, 2) + | shl(X & 2, 1) + | shr(Y & 4, 1) + | shr(X & 4, 2); + + // Scale to [0,1) by /64, then to (-0.5,0.5) using 63/128 (~0.492) as 0.5-ε, + // and finally scale all that by rate. We keep dither strength strictly + // within ±0.5 to not change exact values like 0 or 1. + + // rate could be a uniform, but since it's based on the destination SkColorType, + // we can bake it in without hurting the cache hit rate. + float scale = rate * ( 2/128.0f), + bias = rate * (-63/128.0f); + skvm::F32 dither = to_F32(M) * scale + bias; + c.r += dither; + c.g += dither; + c.b += dither; + + c.r = clamp(c.r, 0.0f, c.a); + c.g = clamp(c.g, 0.0f, c.a); + c.b = clamp(c.b, 0.0f, c.a); + return c; + } + }; +} // namespace + +bool SkVMBlitter::Key::operator==(const Key& that) const { + return this->shader == that.shader + && this->clip == that.clip + && this->blender == that.blender + && this->colorSpace == that.colorSpace + && this->colorType == that.colorType + && this->alphaType == that.alphaType + && this->coverage == that.coverage; +} + +SkVMBlitter::Key SkVMBlitter::Key::withCoverage(Coverage c) const { + Key k = *this; + k.coverage = SkToU8(c); + return k; +} + +SkVMBlitter::Params SkVMBlitter::Params::withCoverage(Coverage c) const { + Params p = *this; + p.coverage = c; + return p; +} + +SkVMBlitter::Params SkVMBlitter::EffectiveParams(const SkPixmap& device, + const SkPixmap* sprite, + SkPaint paint, + const SkMatrix& ctm, + sk_sp clip) { + // Sprites take priority over any shader. (There's rarely one set, and it's meaningless.) + if (sprite) { + paint.setShader(sk_make_sp(*sprite)); + } + + // Normal blitters will have already folded color filters into their shader, + // but we may still need to do that here for SpriteShaders. + if (paint.getColorFilter()) { + SkPaintPriv::RemoveColorFilter(&paint, device.colorSpace()); + } + SkASSERT(!paint.getColorFilter()); + + // If there's no explicit shader, SkColorShader is the shader, + // but if there is a shader, it's modulated by the paint alpha. + sk_sp shader = paint.refShader(); + if (!shader) { + shader = SkShaders::Color(paint.getColor4f(), nullptr); + if (!shader) { + // If the paint color is non-finite (possible after RemoveColorFilter), we might not + // have a shader. (oss-fuzz:49391) + shader = SkShaders::Color(SK_ColorTRANSPARENT); + } + } else if (paint.getAlphaf() < 1.0f) { + shader = sk_make_sp(std::move(shader), + paint.getAlphaf(), + sk_make_sp()); + paint.setAlphaf(1.0f); + } + + // Add dither to the end of the shader pipeline if requested and needed. + if (paint.isDither() && !as_SB(shader)->isConstant()) { + shader = sk_make_sp(std::move(shader)); + } + + // Add the blender. + sk_sp blender = paint.refBlender(); + if (!blender) { + blender = SkBlender::Mode(SkBlendMode::kSrcOver); + } + + // The most common blend mode is SrcOver, and it can be strength-reduced + // _greatly_ to Src mode when the shader is opaque. + // + // In general all the information we use to make decisions here need to + // be reflected in Params and Key to make program caching sound, and it + // might appear that shader->isOpaque() is a property of the shader's + // uniforms than its fundamental program structure and so unsafe to use. + // + // Opacity is such a powerful property that SkShaderBase::program() + // forces opacity for any shader subclass that claims isOpaque(), so + // the opaque bit is strongly guaranteed to be part of the program and + // not just a property of the uniforms. The shader program hash includes + // this information, making it safe to use anywhere in the blitter codegen. + if (as_BB(blender)->asBlendMode() == SkBlendMode::kSrcOver && shader->isOpaque()) { + blender = SkBlender::Mode(SkBlendMode::kSrc); + } + + SkColor4f paintColor = paint.getColor4f(); + SkColorSpaceXformSteps{sk_srgb_singleton(), kUnpremul_SkAlphaType, + device.colorSpace(), kUnpremul_SkAlphaType} + .apply(paintColor.vec()); + + return { + std::move(shader), + std::move(clip), + std::move(blender), + { device.colorType(), device.alphaType(), device.refColorSpace() }, + Coverage::Full, // Placeholder... withCoverage() will change as needed. + paintColor, + ctm, + }; +} + +skvm::Color SkVMBlitter::DstColor(skvm::Builder* p, const Params& params) { + skvm::PixelFormat dstFormat = skvm::SkColorType_to_PixelFormat(params.dst.colorType()); + skvm::Ptr dst_ptr = p->varying(SkColorTypeBytesPerPixel(params.dst.colorType())); + return p->load(dstFormat, dst_ptr); +} + +void SkVMBlitter::BuildProgram(skvm::Builder* p, const Params& params, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc) { + // First two arguments are always uniforms and the destination buffer. + uniforms->base = p->uniform(); + skvm::Ptr dst_ptr = p->varying(SkColorTypeBytesPerPixel(params.dst.colorType())); + // A SpriteShader (in this file) may next use one argument as its varying source. + // Subsequent arguments depend on params.coverage: + // - Full: (no more arguments) + // - Mask3D: mul varying, add varying, 8-bit coverage varying + // - MaskA8: 8-bit coverage varying + // - MaskLCD16: 565 coverage varying + // - UniformF: float coverage uniform + + skvm::Coord device = device_coord(p, uniforms); + skvm::Color paint = p->uniformColor(params.paint, uniforms); + + // See note about arguments above: a SpriteShader will call p->arg() once during program(). + skvm::Color src = as_SB(params.shader)->rootProgram(p, + device, + paint, + params.ctm, + params.dst, + uniforms, + alloc); + SkASSERT(src); + if (params.coverage == Coverage::Mask3D) { + skvm::F32 M = from_unorm(8, p->load8(p->varying())), + A = from_unorm(8, p->load8(p->varying())); + + src.r = min(src.r * M + A, src.a); + src.g = min(src.g * M + A, src.a); + src.b = min(src.b * M + A, src.a); + } + + // GL clamps all its color channels to limits of the format just before the blend step (~here). + // TODO: Below, we also clamp after the blend step. If we can prove that none of the work here + // (especially blending, for built-in blend modes) will produce colors outside [0, 1] we may be + // able to skip the second clamp. For now, we clamp twice. + if (SkColorTypeIsNormalized(params.dst.colorType())) { + src = clamp01(src); + } + + // Load the destination color. + skvm::PixelFormat dstFormat = skvm::SkColorType_to_PixelFormat(params.dst.colorType()); + skvm::Color dst = p->load(dstFormat, dst_ptr); + if (params.dst.isOpaque()) { + // When a destination is known opaque, we may assume it both starts and stays fully + // opaque, ignoring any math that disagrees. This sometimes trims a little work. + dst.a = p->splat(1.0f); + } else if (params.dst.alphaType() == kUnpremul_SkAlphaType) { + // All our blending works in terms of premul. + dst = premul(dst); + } + + // Load coverage. + skvm::Color cov; + switch (params.coverage) { + case Coverage::Full: + cov.r = cov.g = cov.b = cov.a = p->splat(1.0f); + break; + + case Coverage::UniformF: + cov.r = cov.g = cov.b = cov.a = p->uniformF(p->uniform(), 0); + break; + + case Coverage::Mask3D: + case Coverage::MaskA8: + cov.r = cov.g = cov.b = cov.a = from_unorm(8, p->load8(p->varying())); + break; + + case Coverage::MaskLCD16: { + skvm::PixelFormat fmt = skvm::SkColorType_to_PixelFormat(kRGB_565_SkColorType); + cov = p->load(fmt, p->varying()); + cov.a = select(src.a < dst.a, min(cov.r, min(cov.g, cov.b)), + max(cov.r, max(cov.g, cov.b))); + } break; + + case Coverage::kCount: + SkUNREACHABLE; + } + if (params.clip) { + skvm::Color clip = as_SB(params.clip)->rootProgram(p, + device, + paint, + params.ctm, + params.dst, + uniforms, + alloc); + SkAssertResult(clip); + cov.r *= clip.a; // We use the alpha channel of clip for all four. + cov.g *= clip.a; + cov.b *= clip.a; + cov.a *= clip.a; + } + + const SkBlenderBase* blender = as_BB(params.blender); + const auto as_blendmode = blender->asBlendMode(); + + // The math for some blend modes lets us fold coverage into src before the blend, which is + // simpler than the canonical post-blend lerp(). + bool applyPostBlendCoverage = true; + if (as_blendmode && + SkBlendMode_ShouldPreScaleCoverage(as_blendmode.value(), + params.coverage == Coverage::MaskLCD16)) { + applyPostBlendCoverage = false; + src.r *= cov.r; + src.g *= cov.g; + src.b *= cov.b; + src.a *= cov.a; + } + + // Apply our blend function to the computed color. + src = blender->program(p, src, dst, params.dst, uniforms, alloc); + + if (applyPostBlendCoverage) { + src.r = lerp(dst.r, src.r, cov.r); + src.g = lerp(dst.g, src.g, cov.g); + src.b = lerp(dst.b, src.b, cov.b); + src.a = lerp(dst.a, src.a, cov.a); + } + + if (params.dst.isOpaque()) { + // (See the note above when loading the destination color.) + src.a = p->splat(1.0f); + } else if (params.dst.alphaType() == kUnpremul_SkAlphaType) { + src = unpremul(src); + } + + // Clamp to fit destination color format if needed. + if (SkColorTypeIsNormalized(params.dst.colorType())) { + src = clamp01(src); + } + + // Write it out! + store(dstFormat, dst_ptr, src); +} + +// If BuildProgram() can't build this program, CacheKey() sets *ok to false. +SkVMBlitter::Key SkVMBlitter::CacheKey( + const Params& params, skvm::Uniforms* uniforms, SkArenaAlloc* alloc, bool* ok) { + // Take care to match buildProgram()'s reuse of the paint color uniforms. + skvm::Uniform r = uniforms->pushF(params.paint.fR), + g = uniforms->pushF(params.paint.fG), + b = uniforms->pushF(params.paint.fB), + a = uniforms->pushF(params.paint.fA); + + auto hash_shader = [&](skvm::Builder& p, const sk_sp& shader, + skvm::Color* outColor) { + const SkShaderBase* sb = as_SB(shader); + + skvm::Coord device = device_coord(&p, uniforms); + skvm::Color paint = { + p.uniformF(r), + p.uniformF(g), + p.uniformF(b), + p.uniformF(a), + }; + + uint64_t hash = 0; + *outColor = sb->rootProgram(&p, + device, + paint, + params.ctm, + params.dst, + uniforms, + alloc); + if (*outColor) { + hash = p.hash(); + // p.hash() folds in all instructions to produce r,g,b,a but does not know + // precisely which value we'll treat as which channel. Imagine the shader + // called std::swap(*r,*b)... it draws differently, but p.hash() is unchanged. + // We'll fold the hash of their IDs in order to disambiguate. + const skvm::Val outputs[] = { + outColor->r.id, + outColor->g.id, + outColor->b.id, + outColor->a.id + }; + hash ^= SkOpts::hash(outputs, sizeof(outputs)); + } else { + *ok = false; + } + return hash; + }; + + // Use this builder for shader, clip and blender, so that color objects that pass + // from one to the other all 'make sense' -- i.e. have the same builder and/or have + // meaningful values for the hash. + // + // Question: better if we just pass in mock uniform colors, so we don't need to + // explicitly use the output color from one stage as input to another? + // + skvm::Builder p; + + // Calculate a hash for the color shader. + SkASSERT(params.shader); + skvm::Color src; + uint64_t shaderHash = hash_shader(p, params.shader, &src); + + // Calculate a hash for the clip shader, if one exists. + uint64_t clipHash = 0; + if (params.clip) { + skvm::Color cov; + clipHash = hash_shader(p, params.clip, &cov); + if (clipHash == 0) { + clipHash = 1; + } + } + + // Calculate a hash for the blender. + uint64_t blendHash = 0; + if (auto bm = as_BB(params.blender)->asBlendMode()) { + blendHash = static_cast(bm.value()); + } else if (*ok) { + const SkBlenderBase* blender = as_BB(params.blender); + + skvm::Color dst = DstColor(&p, params); + skvm::Color outColor = blender->program(&p, src, dst, params.dst, uniforms, alloc); + if (outColor) { + blendHash = p.hash(); + // Like in `hash_shader` above, we must fold the color component IDs into our hash. + const skvm::Val outputs[] = { + outColor.r.id, + outColor.g.id, + outColor.b.id, + outColor.a.id + }; + blendHash ^= SkOpts::hash(outputs, sizeof(outputs)); + } else { + *ok = false; + } + if (blendHash == 0) { + blendHash = 1; + } + } + + return { + shaderHash, + clipHash, + blendHash, + params.dst.colorSpace() ? params.dst.colorSpace()->hash() : 0, + SkToU8(params.dst.colorType()), + SkToU8(params.dst.alphaType()), + SkToU8(params.coverage), + }; +} + +SkVMBlitter::SkVMBlitter(const SkPixmap& device, + const SkPaint& paint, + const SkPixmap* sprite, + SkIPoint spriteOffset, + const SkMatrix& ctm, + sk_sp clip, + bool* ok) + : fDevice(device) + , fSprite(sprite ? *sprite : SkPixmap{}) + , fSpriteOffset(spriteOffset) + , fUniforms(skvm::UPtr{{0}}, kBlitterUniformsCount) + , fParams(EffectiveParams(device, sprite, paint, ctm, std::move(clip))) + , fKey(CacheKey(fParams, &fUniforms, &fAlloc, ok)) {} + +SkVMBlitter::~SkVMBlitter() { + if (fStoreToCache) { + if (SkLRUCache* cache = TryAcquireProgramCache()) { + auto cache_program = [&](SkTLazy& program, Coverage coverage) { + if (program.isValid() && !program->hasTraceHooks()) { + cache->insert_or_update(fKey.withCoverage(coverage), std::move(*program)); + } + }; + for (int c = 0; c < Coverage::kCount; c++) { + cache_program(fPrograms[c], static_cast(c)); + } + + ReleaseProgramCache(); + } + } +} + +SkLRUCache* SkVMBlitter::TryAcquireProgramCache() { +#if defined(SKVM_JIT) + thread_local static SkLRUCache cache{64}; + return &cache; +#else + // iOS now supports thread_local since iOS 9. + // On the other hand, we'll never be able to JIT there anyway. + // It's probably fine to not cache any interpreted programs, anywhere. + return nullptr; +#endif +} + +SkString SkVMBlitter::DebugName(const Key& key) { + return SkStringPrintf("Shader-%" PRIx64 "_Clip-%" PRIx64 "_Blender-%" PRIx64 + "_CS-%" PRIx64 "_CT-%d_AT-%d_Cov-%d", + key.shader, + key.clip, + key.blender, + key.colorSpace, + key.colorType, + key.alphaType, + key.coverage); +} + +void SkVMBlitter::ReleaseProgramCache() {} + +skvm::Program* SkVMBlitter::buildProgram(Coverage coverage) { + // eg, blitter re-use... + if (fProgramPtrs[coverage]) { + return fProgramPtrs[coverage]; + } + + // Next, cache lookup... + Key key = fKey.withCoverage(coverage); + { + skvm::Program* p = nullptr; + if (SkLRUCache* cache = TryAcquireProgramCache()) { + p = cache->find(key); + ReleaseProgramCache(); + } + if (p) { + SkASSERT(!p->empty()); + fProgramPtrs[coverage] = p; + return p; + } + } + + // Okay, let's build it... + fStoreToCache = true; + + // We don't really _need_ to rebuild fUniforms here. + // It's just more natural to have effects unconditionally emit them, + // and more natural to rebuild fUniforms than to emit them into a temporary buffer. + // fUniforms should reuse the exact same memory, so this is very cheap. + SkDEBUGCODE(size_t prev = fUniforms.buf.size();) + fUniforms.buf.resize(kBlitterUniformsCount); + skvm::Builder builder; + BuildProgram(&builder, fParams.withCoverage(coverage), &fUniforms, &fAlloc); + SkASSERTF(fUniforms.buf.size() == prev, + "%zu, prev was %zu", fUniforms.buf.size(), prev); + + skvm::Program program = builder.done(DebugName(key).c_str()); + if ((false)) { + static std::atomic missed{0}, + total{0}; + if (!program.hasJIT()) { + SkDebugf("\ncouldn't JIT %s\n", DebugName(key).c_str()); + builder.dump(); + program.dump(); + + missed++; + } + if (0 == total++) { + atexit([]{ SkDebugf("SkVMBlitter compiled %d programs, %d without JIT.\n", + total.load(), missed.load()); }); + } + } + fProgramPtrs[coverage] = fPrograms[coverage].set(std::move(program)); + return fProgramPtrs[coverage]; +} + +void SkVMBlitter::updateUniforms(int right, int y) { + BlitterUniforms uniforms{right, y}; + memcpy(fUniforms.buf.data(), &uniforms, sizeof(BlitterUniforms)); +} + +const void* SkVMBlitter::isSprite(int x, int y) const { + if (fSprite.colorType() != kUnknown_SkColorType) { + return fSprite.addr(x - fSpriteOffset.x(), + y - fSpriteOffset.y()); + } + return nullptr; +} + +void SkVMBlitter::blitH(int x, int y, int w) { + skvm::Program* blit_h = this->buildProgram(Coverage::Full); + this->updateUniforms(x+w, y); + if (const void* sprite = this->isSprite(x,y)) { + SK_BLITTER_TRACE_STEP(blitH1, true, /*scanlines=*/1, /*pixels=*/w); + blit_h->eval(w, fUniforms.buf.data(), fDevice.addr(x,y), sprite); + } else { + SK_BLITTER_TRACE_STEP(blitH2, true, /*scanlines=*/1, /*pixels=*/w); + blit_h->eval(w, fUniforms.buf.data(), fDevice.addr(x,y)); + } +} + +void SkVMBlitter::blitAntiH(int x, int y, const SkAlpha cov[], const int16_t runs[]) { + skvm::Program* blit_anti_h = this->buildProgram(Coverage::UniformF); + skvm::Program* blit_h = this->buildProgram(Coverage::Full); + + SK_BLITTER_TRACE_STEP(blitAntiH, true, /*scanlines=*/1ul, /*pixels=*/0ul); + for (int16_t run = *runs; run > 0; run = *runs) { + SK_BLITTER_TRACE_STEP_ACCUMULATE(blitAntiH, /*pixels=*/run); + const SkAlpha coverage = *cov; + if (coverage != 0x00) { + this->updateUniforms(x+run, y); + const void* sprite = this->isSprite(x,y); + if (coverage == 0xFF) { + if (sprite) { + blit_h->eval(run, fUniforms.buf.data(), fDevice.addr(x,y), sprite); + } else { + blit_h->eval(run, fUniforms.buf.data(), fDevice.addr(x,y)); + } + } else { + const float covF = *cov * (1/255.0f); + if (sprite) { + blit_anti_h->eval(run, fUniforms.buf.data(), fDevice.addr(x,y), sprite, &covF); + } else { + blit_anti_h->eval(run, fUniforms.buf.data(), fDevice.addr(x,y), &covF); + } + } + } + x += run; + runs += run; + cov += run; + } +} + +void SkVMBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { + if (mask.fFormat == SkMask::kBW_Format) { + return SkBlitter::blitMask(mask, clip); + } + + const skvm::Program* program = nullptr; + switch (mask.fFormat) { + default: SkUNREACHABLE; // ARGB and SDF masks shouldn't make it here. + + case SkMask::k3D_Format: + program = this->buildProgram(Coverage::Mask3D); + break; + + case SkMask::kA8_Format: + program = this->buildProgram(Coverage::MaskA8); + break; + + case SkMask::kLCD16_Format: + program = this->buildProgram(Coverage::MaskLCD16); + break; + } + + SkASSERT(program); + if (program) { + SK_BLITTER_TRACE_STEP(blitMask, + true, + /*scanlines=*/clip.height(), + /*pixels=*/clip.width() * clip.height()); + + for (int y = clip.top(); y < clip.bottom(); y++) { + int x = clip.left(), + w = clip.width(); + void* dptr = fDevice.writable_addr(x,y); + auto mptr = (const uint8_t*)mask.getAddr(x,y); + this->updateUniforms(x+w,y); + + if (mask.fFormat == SkMask::k3D_Format) { + size_t plane = mask.computeImageSize(); + if (const void* sprite = this->isSprite(x,y)) { + program->eval(w, fUniforms.buf.data(), dptr, sprite, mptr + 1*plane + , mptr + 2*plane + , mptr + 0*plane); + } else { + program->eval(w, fUniforms.buf.data(), dptr, mptr + 1*plane + , mptr + 2*plane + , mptr + 0*plane); + } + } else { + if (const void* sprite = this->isSprite(x,y)) { + program->eval(w, fUniforms.buf.data(), dptr, sprite, mptr); + } else { + program->eval(w, fUniforms.buf.data(), dptr, mptr); + } + } + } + } +} + +SkVMBlitter* SkVMBlitter::Make(const SkPixmap& device, + const SkPaint& paint, + const SkMatrix& ctm, + SkArenaAlloc* alloc, + sk_sp clip) { + bool ok = true; + SkVMBlitter* blitter = alloc->make(device, + paint, + /*sprite=*/nullptr, + SkIPoint{0,0}, + ctm, + std::move(clip), + &ok); + return ok ? blitter : nullptr; +} + +SkVMBlitter* SkVMBlitter::Make(const SkPixmap& device, + const SkPaint& paint, + const SkPixmap& sprite, + int left, int top, + SkArenaAlloc* alloc, + sk_sp clip) { + if (paint.getMaskFilter()) { + // TODO: SkVM support for mask filters? definitely possible! + return nullptr; + } + bool ok = true; + auto blitter = alloc->make(device, + paint, + &sprite, + SkIPoint{left,top}, + SkMatrix::I(), + std::move(clip), + &ok); + return ok ? blitter : nullptr; +} diff --git a/gfx/skia/skia/src/core/SkVMBlitter.h b/gfx/skia/skia/src/core/SkVMBlitter.h new file mode 100644 index 0000000000..5c49be8a15 --- /dev/null +++ b/gfx/skia/skia/src/core/SkVMBlitter.h @@ -0,0 +1,113 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkVMBlitter_DEFINED +#define SkVMBlitter_DEFINED + +#include "include/core/SkPixmap.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkBlitter.h" +#include "src/core/SkLRUCache.h" +#include "src/core/SkVM.h" + +class SkVMBlitter final : public SkBlitter { +public: + static SkVMBlitter* Make(const SkPixmap& dst, + const SkPaint&, + const SkMatrix& ctm, + SkArenaAlloc*, + sk_sp clipShader); + + static SkVMBlitter* Make(const SkPixmap& dst, + const SkPaint&, + const SkPixmap& sprite, + int left, int top, + SkArenaAlloc*, + sk_sp clipShader); + + SkVMBlitter(const SkPixmap& device, + const SkPaint& paint, + const SkPixmap* sprite, + SkIPoint spriteOffset, + const SkMatrix& ctm, + sk_sp clip, + bool* ok); + + ~SkVMBlitter() override; + +private: + enum Coverage { Full, UniformF, MaskA8, MaskLCD16, Mask3D, kCount }; + struct Key { + uint64_t shader, + clip, + blender, + colorSpace; + uint8_t colorType, + alphaType, + coverage; + uint8_t padding8{0}; + uint32_t padding{0}; + // Params::{paint,quality,matrices} are only passed to {shader,clip}->program(), + // not used here by the blitter itself. No need to include them in the key; + // they'll be folded into the shader key if used. + + bool operator==(const Key& that) const; + Key withCoverage(Coverage c) const; + }; + + struct Params { + sk_sp shader; + sk_sp clip; + sk_sp blender; // never null + SkColorInfo dst; + Coverage coverage; + SkColor4f paint; + SkMatrix ctm; + + Params withCoverage(Coverage c) const; + }; + + static Params EffectiveParams(const SkPixmap& device, + const SkPixmap* sprite, + SkPaint paint, + const SkMatrix& ctm, + sk_sp clip); + static skvm::Color DstColor(skvm::Builder* p, const Params& params); + static void BuildProgram(skvm::Builder* p, const Params& params, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc); + static Key CacheKey(const Params& params, + skvm::Uniforms* uniforms, SkArenaAlloc* alloc, bool* ok); + static SkLRUCache* TryAcquireProgramCache(); + static SkString DebugName(const Key& key); + static void ReleaseProgramCache(); + + skvm::Program* buildProgram(Coverage coverage); + void updateUniforms(int right, int y); + const void* isSprite(int x, int y) const; + + void blitH(int x, int y, int w) override; + void blitAntiH(int x, int y, const SkAlpha cov[], const int16_t runs[]) override; + +private: + void blitMask(const SkMask& mask, const SkIRect& clip) override; + + SkPixmap fDevice; + const SkPixmap fSprite; // See isSprite(). + const SkIPoint fSpriteOffset; + skvm::Uniforms fUniforms; // Most data is copied directly into fUniforms, + SkArenaAlloc fAlloc{2*sizeof(void*)}; // but a few effects need to ref large content. + const Params fParams; + const Key fKey; + bool fStoreToCache = false; + + skvm::Program* fProgramPtrs[Coverage::kCount] = {nullptr}; + SkTLazy fPrograms[Coverage::kCount]; + + friend class Viewer; +}; +#endif // SkVMBlitter_DEFINED diff --git a/gfx/skia/skia/src/core/SkVM_fwd.h b/gfx/skia/skia/src/core/SkVM_fwd.h new file mode 100644 index 0000000000..2c2c044e35 --- /dev/null +++ b/gfx/skia/skia/src/core/SkVM_fwd.h @@ -0,0 +1,23 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkVM_fwd_DEFINED +#define SkVM_fwd_DEFINED + +namespace skvm { + class Assembler; + class Builder; + class Program; + struct Ptr; + struct I32; + struct F32; + struct Color; + struct Coord; + struct Uniforms; +} // namespace skvm + +#endif//SkVM_fwd_DEFINED diff --git a/gfx/skia/skia/src/core/SkValidationUtils.h b/gfx/skia/skia/src/core/SkValidationUtils.h new file mode 100644 index 0000000000..16dfdb3199 --- /dev/null +++ b/gfx/skia/skia/src/core/SkValidationUtils.h @@ -0,0 +1,36 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkValidationUtils_DEFINED +#define SkValidationUtils_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "src/core/SkXfermodePriv.h" + +/** Returns true if mode's value is in the SkBlendMode enum. + */ +static inline bool SkIsValidMode(SkBlendMode mode) { + return (unsigned)mode <= (unsigned)SkBlendMode::kLastMode; +} + +/** Returns true if the rect's dimensions are between 0 and SK_MaxS32 + */ +static inline bool SkIsValidIRect(const SkIRect& rect) { + return rect.width() >= 0 && rect.height() >= 0; +} + +/** Returns true if the rect's dimensions are between 0 and SK_ScalarMax + */ +static inline bool SkIsValidRect(const SkRect& rect) { + return (rect.fLeft <= rect.fRight) && + (rect.fTop <= rect.fBottom) && + SkScalarIsFinite(rect.width()) && + SkScalarIsFinite(rect.height()); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkVertState.cpp b/gfx/skia/skia/src/core/SkVertState.cpp new file mode 100644 index 0000000000..d10a23ddde --- /dev/null +++ b/gfx/skia/skia/src/core/SkVertState.cpp @@ -0,0 +1,106 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkVertState.h" + +bool VertState::Triangles(VertState* state) { + int index = state->fCurrIndex; + if (index + 3 > state->fCount) { + return false; + } + state->f0 = index + 0; + state->f1 = index + 1; + state->f2 = index + 2; + state->fCurrIndex = index + 3; + return true; +} + +bool VertState::TrianglesX(VertState* state) { + const uint16_t* indices = state->fIndices; + int index = state->fCurrIndex; + if (index + 3 > state->fCount) { + return false; + } + state->f0 = indices[index + 0]; + state->f1 = indices[index + 1]; + state->f2 = indices[index + 2]; + state->fCurrIndex = index + 3; + return true; +} + +bool VertState::TriangleStrip(VertState* state) { + int index = state->fCurrIndex; + if (index + 3 > state->fCount) { + return false; + } + state->f2 = index + 2; + if (index & 1) { + state->f0 = index + 1; + state->f1 = index + 0; + } else { + state->f0 = index + 0; + state->f1 = index + 1; + } + state->fCurrIndex = index + 1; + return true; +} + +bool VertState::TriangleStripX(VertState* state) { + const uint16_t* indices = state->fIndices; + int index = state->fCurrIndex; + if (index + 3 > state->fCount) { + return false; + } + state->f2 = indices[index + 2]; + if (index & 1) { + state->f0 = indices[index + 1]; + state->f1 = indices[index + 0]; + } else { + state->f0 = indices[index + 0]; + state->f1 = indices[index + 1]; + } + state->fCurrIndex = index + 1; + return true; +} + +bool VertState::TriangleFan(VertState* state) { + int index = state->fCurrIndex; + if (index + 3 > state->fCount) { + return false; + } + state->f0 = 0; + state->f1 = index + 1; + state->f2 = index + 2; + state->fCurrIndex = index + 1; + return true; +} + +bool VertState::TriangleFanX(VertState* state) { + const uint16_t* indices = state->fIndices; + int index = state->fCurrIndex; + if (index + 3 > state->fCount) { + return false; + } + state->f0 = indices[0]; + state->f1 = indices[index + 1]; + state->f2 = indices[index + 2]; + state->fCurrIndex = index + 1; + return true; +} + +VertState::Proc VertState::chooseProc(SkVertices::VertexMode mode) { + switch (mode) { + case SkVertices::kTriangles_VertexMode: + return fIndices ? TrianglesX : Triangles; + case SkVertices::kTriangleStrip_VertexMode: + return fIndices ? TriangleStripX : TriangleStrip; + case SkVertices::kTriangleFan_VertexMode: + return fIndices ? TriangleFanX : TriangleFan; + default: + return nullptr; + } +} diff --git a/gfx/skia/skia/src/core/SkVertState.h b/gfx/skia/skia/src/core/SkVertState.h new file mode 100644 index 0000000000..fb981b7c2e --- /dev/null +++ b/gfx/skia/skia/src/core/SkVertState.h @@ -0,0 +1,58 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkVertState_DEFINED +#define SkVertState_DEFINED + +#include "include/core/SkVertices.h" + +/** \struct VertState + This is a helper for drawVertices(). It is used to iterate over the triangles + that are to be rendered based on an SkCanvas::VertexMode and (optionally) an + index array. It does not copy the index array and the client must ensure it + remains valid for the lifetime of the VertState object. +*/ + +struct VertState { + int f0, f1, f2; + + /** + * Construct a VertState from a vertex count, index array, and index count. + * If the vertices are unindexed pass nullptr for indices. + */ + VertState(int vCount, const uint16_t indices[], int indexCount) + : fIndices(indices) { + fCurrIndex = 0; + if (indices) { + fCount = indexCount; + } else { + fCount = vCount; + } + } + + typedef bool (*Proc)(VertState*); + + /** + * Choose an appropriate function to traverse the vertices. + * @param mode Specifies the SkCanvas::VertexMode. + */ + Proc chooseProc(SkVertices::VertexMode mode); + +private: + int fCount; + int fCurrIndex; + const uint16_t* fIndices; + + static bool Triangles(VertState*); + static bool TrianglesX(VertState*); + static bool TriangleStrip(VertState*); + static bool TriangleStripX(VertState*); + static bool TriangleFan(VertState*); + static bool TriangleFanX(VertState*); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkVertices.cpp b/gfx/skia/skia/src/core/SkVertices.cpp new file mode 100644 index 0000000000..47ceaf919f --- /dev/null +++ b/gfx/skia/skia/src/core/SkVertices.cpp @@ -0,0 +1,338 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkVertices.h" + +#include "include/core/SkData.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkCanvasPriv.h" +#include "src/core/SkOpts.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSafeRange.h" +#include "src/core/SkVerticesPriv.h" +#include "src/core/SkWriteBuffer.h" +#include +#include + +static int32_t next_id() { + static std::atomic nextID{1}; + + int32_t id; + do { + id = nextID.fetch_add(1, std::memory_order_relaxed); + } while (id == SK_InvalidGenID); + return id; +} + +struct SkVertices::Desc { + VertexMode fMode; + int fVertexCount, + fIndexCount; + bool fHasTexs, + fHasColors; +}; + +struct SkVertices::Sizes { + Sizes(const Desc& desc) { + SkSafeMath safe; + + fVSize = safe.mul(desc.fVertexCount, sizeof(SkPoint)); + fTSize = desc.fHasTexs ? safe.mul(desc.fVertexCount, sizeof(SkPoint)) : 0; + fCSize = desc.fHasColors ? safe.mul(desc.fVertexCount, sizeof(SkColor)) : 0; + + fBuilderTriFanISize = 0; + fISize = safe.mul(desc.fIndexCount, sizeof(uint16_t)); + if (kTriangleFan_VertexMode == desc.fMode) { + int numFanTris = 0; + if (desc.fIndexCount) { + fBuilderTriFanISize = fISize; + numFanTris = desc.fIndexCount - 2; + } else { + numFanTris = desc.fVertexCount - 2; + // By forcing this to become indexed we are adding a constraint to the maximum + // number of vertices. + if (desc.fVertexCount > (SkTo(UINT16_MAX) + 1)) { + sk_bzero(this, sizeof(*this)); + return; + } + } + if (numFanTris <= 0) { + sk_bzero(this, sizeof(*this)); + return; + } + fISize = safe.mul(numFanTris, 3 * sizeof(uint16_t)); + } + + fTotal = safe.add(sizeof(SkVertices), + safe.add(fVSize, + safe.add(fTSize, + safe.add(fCSize, + fISize)))); + + if (safe.ok()) { + fArrays = fVSize + fTSize + fCSize + fISize; // just the sum of the arrays + } else { + sk_bzero(this, sizeof(*this)); + } + } + + bool isValid() const { return fTotal != 0; } + + size_t fTotal = 0; // size of entire SkVertices allocation (obj + arrays) + size_t fArrays; // size of all the data arrays (V + D + T + C + I) + size_t fVSize; + size_t fTSize; + size_t fCSize; + size_t fISize; + + // For indexed tri-fans this is the number of amount of space fo indices needed in the builder + // before conversion to indexed triangles (or zero if not indexed or not a triangle fan). + size_t fBuilderTriFanISize; +}; + +SkVertices::Builder::Builder(VertexMode mode, int vertexCount, int indexCount, + uint32_t builderFlags) { + bool hasTexs = SkToBool(builderFlags & SkVertices::kHasTexCoords_BuilderFlag); + bool hasColors = SkToBool(builderFlags & SkVertices::kHasColors_BuilderFlag); + this->init({mode, vertexCount, indexCount, hasTexs, hasColors}); +} + +SkVertices::Builder::Builder(const Desc& desc) { + this->init(desc); +} + +void SkVertices::Builder::init(const Desc& desc) { + Sizes sizes(desc); + if (!sizes.isValid()) { + SkASSERT(!this->isValid()); + return; + } + + void* storage = ::operator new (sizes.fTotal); + if (sizes.fBuilderTriFanISize) { + fIntermediateFanIndices.reset(new uint8_t[sizes.fBuilderTriFanISize]); + } + + fVertices.reset(new (storage) SkVertices); + + // need to point past the object to store the arrays + char* ptr = (char*)storage + sizeof(SkVertices); + + // return the original ptr (or null), but then advance it by size + auto advance = [&ptr](size_t size) { + char* new_ptr = size ? ptr : nullptr; + ptr += size; + return new_ptr; + }; + + fVertices->fPositions = (SkPoint*) advance(sizes.fVSize); + fVertices->fTexs = (SkPoint*) advance(sizes.fTSize); + fVertices->fColors = (SkColor*) advance(sizes.fCSize); + fVertices->fIndices = (uint16_t*)advance(sizes.fISize); + + fVertices->fVertexCount = desc.fVertexCount; + fVertices->fIndexCount = desc.fIndexCount; + fVertices->fMode = desc.fMode; + + // We defer assigning fBounds and fUniqueID until detach() is called +} + +sk_sp SkVertices::Builder::detach() { + if (fVertices) { + fVertices->fBounds.setBounds(fVertices->fPositions, fVertices->fVertexCount); + if (fVertices->fMode == kTriangleFan_VertexMode) { + if (fIntermediateFanIndices) { + SkASSERT(fVertices->fIndexCount); + auto tempIndices = this->indices(); + for (int t = 0; t < fVertices->fIndexCount - 2; ++t) { + fVertices->fIndices[3 * t + 0] = tempIndices[0]; + fVertices->fIndices[3 * t + 1] = tempIndices[t + 1]; + fVertices->fIndices[3 * t + 2] = tempIndices[t + 2]; + } + fVertices->fIndexCount = 3 * (fVertices->fIndexCount - 2); + } else { + SkASSERT(!fVertices->fIndexCount); + for (int t = 0; t < fVertices->fVertexCount - 2; ++t) { + fVertices->fIndices[3 * t + 0] = 0; + fVertices->fIndices[3 * t + 1] = SkToU16(t + 1); + fVertices->fIndices[3 * t + 2] = SkToU16(t + 2); + } + fVertices->fIndexCount = 3 * (fVertices->fVertexCount - 2); + } + fVertices->fMode = kTriangles_VertexMode; + } + fVertices->fUniqueID = next_id(); + return std::move(fVertices); // this will null fVertices after the return + } + return nullptr; +} + +SkPoint* SkVertices::Builder::positions() { + return fVertices ? const_cast(fVertices->fPositions) : nullptr; +} + +SkPoint* SkVertices::Builder::texCoords() { + return fVertices ? const_cast(fVertices->fTexs) : nullptr; +} + +SkColor* SkVertices::Builder::colors() { + return fVertices ? const_cast(fVertices->fColors) : nullptr; +} + +uint16_t* SkVertices::Builder::indices() { + if (!fVertices) { + return nullptr; + } + if (fIntermediateFanIndices) { + return reinterpret_cast(fIntermediateFanIndices.get()); + } + return const_cast(fVertices->fIndices); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkVertices::MakeCopy(VertexMode mode, int vertexCount, + const SkPoint pos[], const SkPoint texs[], + const SkColor colors[], + int indexCount, const uint16_t indices[]) { + auto desc = Desc{mode, vertexCount, indexCount, !!texs, !!colors}; + Builder builder(desc); + if (!builder.isValid()) { + return nullptr; + } + + Sizes sizes(desc); + SkASSERT(sizes.isValid()); + sk_careful_memcpy(builder.positions(), pos, sizes.fVSize); + sk_careful_memcpy(builder.texCoords(), texs, sizes.fTSize); + sk_careful_memcpy(builder.colors(), colors, sizes.fCSize); + size_t isize = (mode == kTriangleFan_VertexMode) ? sizes.fBuilderTriFanISize : sizes.fISize; + sk_careful_memcpy(builder.indices(), indices, isize); + + return builder.detach(); +} + +size_t SkVertices::approximateSize() const { + return this->getSizes().fTotal; +} + +SkVertices::Sizes SkVertices::getSizes() const { + Sizes sizes({fMode, fVertexCount, fIndexCount, !!fTexs, !!fColors}); + SkASSERT(sizes.isValid()); + return sizes; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +// storage = packed | vertex_count | index_count | attr_count +// | pos[] | custom[] | texs[] | colors[] | indices[] + +#define kMode_Mask 0x0FF +#define kHasTexs_Mask 0x100 +#define kHasColors_Mask 0x200 + +void SkVerticesPriv::encode(SkWriteBuffer& buffer) const { + // packed has room for additional flags in the future + uint32_t packed = static_cast(fVertices->fMode); + SkASSERT((packed & ~kMode_Mask) == 0); // our mode fits in the mask bits + if (fVertices->fTexs) { + packed |= kHasTexs_Mask; + } + if (fVertices->fColors) { + packed |= kHasColors_Mask; + } + + SkVertices::Sizes sizes = fVertices->getSizes(); + SkASSERT(!sizes.fBuilderTriFanISize); + + // Header + buffer.writeUInt(packed); + buffer.writeInt(fVertices->fVertexCount); + buffer.writeInt(fVertices->fIndexCount); + + // Data arrays + buffer.writeByteArray(fVertices->fPositions, sizes.fVSize); + buffer.writeByteArray(fVertices->fTexs, sizes.fTSize); + buffer.writeByteArray(fVertices->fColors, sizes.fCSize); + // if index-count is odd, we won't be 4-bytes aligned, so we call the pad version + buffer.writeByteArray(fVertices->fIndices, sizes.fISize); +} + +sk_sp SkVerticesPriv::Decode(SkReadBuffer& buffer) { + auto decode = [](SkReadBuffer& buffer) -> sk_sp { + SkSafeRange safe; + bool hasCustomData = buffer.isVersionLT(SkPicturePriv::kVerticesRemoveCustomData_Version); + + const uint32_t packed = buffer.readUInt(); + const int vertexCount = safe.checkGE(buffer.readInt(), 0); + const int indexCount = safe.checkGE(buffer.readInt(), 0); + const int attrCount = hasCustomData ? safe.checkGE(buffer.readInt(), 0) : 0; + const SkVertices::VertexMode mode = safe.checkLE( + packed & kMode_Mask, SkVertices::kLast_VertexMode); + const bool hasTexs = SkToBool(packed & kHasTexs_Mask); + const bool hasColors = SkToBool(packed & kHasColors_Mask); + + // Check that the header fields and buffer are valid. If this is data with the experimental + // custom attributes feature - we don't support that any more. + // We also don't support serialized triangle-fan data. We stopped writing that long ago, + // so it should never appear in valid encoded data. + if (!safe || !buffer.isValid() || attrCount || + mode == SkVertices::kTriangleFan_VertexMode) { + return nullptr; + } + + const SkVertices::Desc desc{mode, vertexCount, indexCount, hasTexs, hasColors}; + SkVertices::Sizes sizes(desc); + if (!sizes.isValid() || sizes.fArrays > buffer.available()) { + return nullptr; + } + + SkVertices::Builder builder(desc); + if (!builder.isValid()) { + return nullptr; + } + + buffer.readByteArray(builder.positions(), sizes.fVSize); + if (hasCustomData) { + size_t customDataSize = 0; + buffer.skipByteArray(&customDataSize); + if (customDataSize != 0) { + return nullptr; + } + } + buffer.readByteArray(builder.texCoords(), sizes.fTSize); + buffer.readByteArray(builder.colors(), sizes.fCSize); + buffer.readByteArray(builder.indices(), sizes.fISize); + + if (!buffer.isValid()) { + return nullptr; + } + + if (indexCount > 0) { + // validate that the indices are in range + const uint16_t* indices = builder.indices(); + for (int i = 0; i < indexCount; ++i) { + if (indices[i] >= (unsigned)vertexCount) { + return nullptr; + } + } + } + + return builder.detach(); + }; + + if (auto verts = decode(buffer)) { + return verts; + } + buffer.validate(false); + return nullptr; +} + +void SkVertices::operator delete(void* p) { + ::operator delete(p); +} diff --git a/gfx/skia/skia/src/core/SkVerticesPriv.h b/gfx/skia/skia/src/core/SkVerticesPriv.h new file mode 100644 index 0000000000..3aa0411ed7 --- /dev/null +++ b/gfx/skia/skia/src/core/SkVerticesPriv.h @@ -0,0 +1,62 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkVerticesPriv_DEFINED +#define SkVerticesPriv_DEFINED + +#include "include/core/SkVertices.h" + +class SkReadBuffer; +class SkWriteBuffer; + +struct SkVertices_DeprecatedBone { float values[6]; }; + +/** Class that adds methods to SkVertices that are only intended for use internal to Skia. + This class is purely a privileged window into SkVertices. It should never have additional + data members or virtual methods. */ +class SkVerticesPriv { +public: + SkVertices::VertexMode mode() const { return fVertices->fMode; } + + bool hasColors() const { return SkToBool(fVertices->fColors); } + bool hasTexCoords() const { return SkToBool(fVertices->fTexs); } + bool hasIndices() const { return SkToBool(fVertices->fIndices); } + + int vertexCount() const { return fVertices->fVertexCount; } + int indexCount() const { return fVertices->fIndexCount; } + + const SkPoint* positions() const { return fVertices->fPositions; } + const SkPoint* texCoords() const { return fVertices->fTexs; } + const SkColor* colors() const { return fVertices->fColors; } + const uint16_t* indices() const { return fVertices->fIndices; } + + // Never called due to RVO in priv(), but must exist for MSVC 2017. + SkVerticesPriv(const SkVerticesPriv&) = default; + + void encode(SkWriteBuffer&) const; + static sk_sp Decode(SkReadBuffer&); + +private: + explicit SkVerticesPriv(SkVertices* vertices) : fVertices(vertices) {} + SkVerticesPriv& operator=(const SkVerticesPriv&) = delete; + + // No taking addresses of this type + const SkVerticesPriv* operator&() const = delete; + SkVerticesPriv* operator&() = delete; + + SkVertices* fVertices; + + friend class SkVertices; // to construct this type +}; + +inline SkVerticesPriv SkVertices::priv() { return SkVerticesPriv(this); } + +inline const SkVerticesPriv SkVertices::priv() const { // NOLINT(readability-const-return-type) + return SkVerticesPriv(const_cast(this)); +} + +#endif diff --git a/gfx/skia/skia/src/core/SkWriteBuffer.cpp b/gfx/skia/skia/src/core/SkWriteBuffer.cpp new file mode 100644 index 0000000000..e02fc6d45b --- /dev/null +++ b/gfx/skia/skia/src/core/SkWriteBuffer.cpp @@ -0,0 +1,283 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkWriteBuffer.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkData.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImage.h" +#include "include/core/SkPoint.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkRect.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkPtrRecorder.h" +#include "src/image/SkImage_Base.h" + +#include +#include + +class SkMatrix; +class SkPaint; +class SkRegion; +class SkStream; +class SkWStream; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkBinaryWriteBuffer::SkBinaryWriteBuffer() + : fFactorySet(nullptr) + , fTFSet(nullptr) { +} + +SkBinaryWriteBuffer::SkBinaryWriteBuffer(void* storage, size_t storageSize) + : fFactorySet(nullptr) + , fTFSet(nullptr) + , fWriter(storage, storageSize) +{} + +SkBinaryWriteBuffer::~SkBinaryWriteBuffer() {} + +bool SkBinaryWriteBuffer::usingInitialStorage() const { + return fWriter.usingInitialStorage(); +} + +void SkBinaryWriteBuffer::writeByteArray(const void* data, size_t size) { + fWriter.write32(SkToU32(size)); + fWriter.writePad(data, size); +} + +void SkBinaryWriteBuffer::writeBool(bool value) { + fWriter.writeBool(value); +} + +void SkBinaryWriteBuffer::writeScalar(SkScalar value) { + fWriter.writeScalar(value); +} + +void SkBinaryWriteBuffer::writeScalarArray(const SkScalar* value, uint32_t count) { + fWriter.write32(count); + fWriter.write(value, count * sizeof(SkScalar)); +} + +void SkBinaryWriteBuffer::writeInt(int32_t value) { + fWriter.write32(value); +} + +void SkBinaryWriteBuffer::writeIntArray(const int32_t* value, uint32_t count) { + fWriter.write32(count); + fWriter.write(value, count * sizeof(int32_t)); +} + +void SkBinaryWriteBuffer::writeUInt(uint32_t value) { + fWriter.write32(value); +} + +void SkBinaryWriteBuffer::writeString(std::string_view value) { + fWriter.writeString(value.data(), value.size()); +} + +void SkBinaryWriteBuffer::writeColor(SkColor color) { + fWriter.write32(color); +} + +void SkBinaryWriteBuffer::writeColorArray(const SkColor* color, uint32_t count) { + fWriter.write32(count); + fWriter.write(color, count * sizeof(SkColor)); +} + +void SkBinaryWriteBuffer::writeColor4f(const SkColor4f& color) { + fWriter.write(&color, sizeof(SkColor4f)); +} + +void SkBinaryWriteBuffer::writeColor4fArray(const SkColor4f* color, uint32_t count) { + fWriter.write32(count); + fWriter.write(color, count * sizeof(SkColor4f)); +} + +void SkBinaryWriteBuffer::writePoint(const SkPoint& point) { + fWriter.writeScalar(point.fX); + fWriter.writeScalar(point.fY); +} + +void SkBinaryWriteBuffer::writePoint3(const SkPoint3& point) { + this->writePad32(&point, sizeof(SkPoint3)); +} + +void SkBinaryWriteBuffer::writePointArray(const SkPoint* point, uint32_t count) { + fWriter.write32(count); + fWriter.write(point, count * sizeof(SkPoint)); +} + +void SkBinaryWriteBuffer::write(const SkM44& matrix) { + fWriter.write(SkMatrixPriv::M44ColMajor(matrix), sizeof(float) * 16); +} + +void SkBinaryWriteBuffer::writeMatrix(const SkMatrix& matrix) { + fWriter.writeMatrix(matrix); +} + +void SkBinaryWriteBuffer::writeIRect(const SkIRect& rect) { + fWriter.write(&rect, sizeof(SkIRect)); +} + +void SkBinaryWriteBuffer::writeRect(const SkRect& rect) { + fWriter.writeRect(rect); +} + +void SkBinaryWriteBuffer::writeRegion(const SkRegion& region) { + fWriter.writeRegion(region); +} + +void SkBinaryWriteBuffer::writeSampling(const SkSamplingOptions& sampling) { + fWriter.writeSampling(sampling); +} + +void SkBinaryWriteBuffer::writePath(const SkPath& path) { + fWriter.writePath(path); +} + +size_t SkBinaryWriteBuffer::writeStream(SkStream* stream, size_t length) { + fWriter.write32(SkToU32(length)); + size_t bytesWritten = fWriter.readFromStream(stream, length); + if (bytesWritten < length) { + fWriter.reservePad(length - bytesWritten); + } + return bytesWritten; +} + +bool SkBinaryWriteBuffer::writeToStream(SkWStream* stream) const { + return fWriter.writeToStream(stream); +} + +/* Format: + * flags: U32 + * encoded : size_32 + data[] + * [subset: IRect] + * [mips] : size_32 + data[] + */ +void SkBinaryWriteBuffer::writeImage(const SkImage* image) { + uint32_t flags = 0; + const SkMipmap* mips = as_IB(image)->onPeekMips(); + if (mips) { + flags |= SkWriteBufferImageFlags::kHasMipmap; + } + if (image->alphaType() == kUnpremul_SkAlphaType) { + flags |= SkWriteBufferImageFlags::kUnpremul; + } + + this->write32(flags); + + sk_sp data; + if (fProcs.fImageProc) { + data = fProcs.fImageProc(const_cast(image), fProcs.fImageCtx); + } + if (!data) { + data = image->encodeToData(); + } + this->writeDataAsByteArray(data.get()); + + if (flags & SkWriteBufferImageFlags::kHasMipmap) { + this->writeDataAsByteArray(mips->serialize().get()); + } +} + +void SkBinaryWriteBuffer::writeTypeface(SkTypeface* obj) { + // Write 32 bits (signed) + // 0 -- default font + // >0 -- index + // <0 -- custom (serial procs) + + if (obj == nullptr) { + fWriter.write32(0); + } else if (fProcs.fTypefaceProc) { + auto data = fProcs.fTypefaceProc(obj, fProcs.fTypefaceCtx); + if (data) { + size_t size = data->size(); + if (!SkTFitsIn(size)) { + size = 0; // fall back to default font + } + int32_t ssize = SkToS32(size); + fWriter.write32(-ssize); // negative to signal custom + if (size) { + this->writePad32(data->data(), size); + } + return; + } + // no data means fall through for std behavior + } + fWriter.write32(fTFSet ? fTFSet->add(obj) : 0); +} + +void SkBinaryWriteBuffer::writePaint(const SkPaint& paint) { + SkPaintPriv::Flatten(paint, *this); +} + +void SkBinaryWriteBuffer::setFactoryRecorder(sk_sp rec) { + fFactorySet = std::move(rec); +} + +void SkBinaryWriteBuffer::setTypefaceRecorder(sk_sp rec) { + fTFSet = std::move(rec); +} + +void SkBinaryWriteBuffer::writeFlattenable(const SkFlattenable* flattenable) { + if (nullptr == flattenable) { + this->write32(0); + return; + } + + /* + * We can write 1 of 2 versions of the flattenable: + * + * 1. index into fFactorySet: This assumes the writer will later resolve the function-ptrs + * into strings for its reader. SkPicture does exactly this, by writing a table of names + * (matching the indices) up front in its serialized form. + * + * 2. string name of the flattenable or index into fFlattenableDict: We store the string to + * allow the reader to specify its own factories after write time. In order to improve + * compression, if we have already written the string, we write its index instead. + */ + + if (SkFlattenable::Factory factory = flattenable->getFactory(); factory && fFactorySet) { + this->write32(fFactorySet->add(factory)); + } else { + const char* name = flattenable->getTypeName(); + SkASSERT(name); + SkASSERT(0 != strcmp("", name)); + + if (uint32_t* indexPtr = fFlattenableDict.find(name)) { + // We will write the index as a 32-bit int. We want the first byte + // that we send to be zero - this will act as a sentinel that we + // have an index (not a string). This means that we will send the + // the index shifted left by 8. The remaining 24-bits should be + // plenty to store the index. Note that this strategy depends on + // being little endian, and type names being non-empty. + SkASSERT(0 == *indexPtr >> 24); + this->write32(*indexPtr << 8); + } else { + this->writeString(name); + fFlattenableDict.set(name, fFlattenableDict.count() + 1); + } + } + + // make room for the size of the flattened object + (void)fWriter.reserve(sizeof(uint32_t)); + // record the current size, so we can subtract after the object writes. + size_t offset = fWriter.bytesWritten(); + // now flatten the object + flattenable->flatten(*this); + size_t objSize = fWriter.bytesWritten() - offset; + // record the obj's size + fWriter.overwriteTAt(offset - sizeof(uint32_t), SkToU32(objSize)); +} diff --git a/gfx/skia/skia/src/core/SkWriteBuffer.h b/gfx/skia/skia/src/core/SkWriteBuffer.h new file mode 100644 index 0000000000..57f9819d08 --- /dev/null +++ b/gfx/skia/skia/src/core/SkWriteBuffer.h @@ -0,0 +1,178 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkWriteBuffer_DEFINED +#define SkWriteBuffer_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkData.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSerialProcs.h" +#include "src/core/SkTHash.h" +#include "src/core/SkWriter32.h" + +#include +#include +#include + +class SkFactorySet; +class SkFlattenable; +class SkImage; +class SkM44; +class SkMatrix; +class SkPaint; +class SkPath; +class SkRefCntSet; +class SkRegion; +class SkStream; +class SkTypeface; +class SkWStream; +struct SkIRect; +struct SkPoint3; +struct SkPoint; +struct SkRect; + +class SkWriteBuffer { +public: + SkWriteBuffer() {} + virtual ~SkWriteBuffer() {} + + virtual void writePad32(const void* buffer, size_t bytes) = 0; + + virtual void writeByteArray(const void* data, size_t size) = 0; + void writeDataAsByteArray(const SkData* data) { + if (!data) { + this->write32(0); + } else { + this->writeByteArray(data->data(), data->size()); + } + } + + virtual void writeBool(bool value) = 0; + virtual void writeScalar(SkScalar value) = 0; + virtual void writeScalarArray(const SkScalar* value, uint32_t count) = 0; + virtual void writeInt(int32_t value) = 0; + virtual void writeIntArray(const int32_t* value, uint32_t count) = 0; + virtual void writeUInt(uint32_t value) = 0; + void write32(int32_t value) { + this->writeInt(value); + } + virtual void writeString(std::string_view value) = 0; + + virtual void writeFlattenable(const SkFlattenable* flattenable) = 0; + virtual void writeColor(SkColor color) = 0; + virtual void writeColorArray(const SkColor* color, uint32_t count) = 0; + virtual void writeColor4f(const SkColor4f& color) = 0; + virtual void writeColor4fArray(const SkColor4f* color, uint32_t count) = 0; + virtual void writePoint(const SkPoint& point) = 0; + virtual void writePointArray(const SkPoint* point, uint32_t count) = 0; + virtual void writePoint3(const SkPoint3& point) = 0; + virtual void write(const SkM44&) = 0; + virtual void writeMatrix(const SkMatrix& matrix) = 0; + virtual void writeIRect(const SkIRect& rect) = 0; + virtual void writeRect(const SkRect& rect) = 0; + virtual void writeRegion(const SkRegion& region) = 0; + virtual void writeSampling(const SkSamplingOptions&) = 0; + virtual void writePath(const SkPath& path) = 0; + virtual size_t writeStream(SkStream* stream, size_t length) = 0; + virtual void writeImage(const SkImage*) = 0; + virtual void writeTypeface(SkTypeface* typeface) = 0; + virtual void writePaint(const SkPaint& paint) = 0; + + void setSerialProcs(const SkSerialProcs& procs) { fProcs = procs; } + +protected: + SkSerialProcs fProcs; + + friend class SkPicturePriv; // fProcs +}; + +/** + * Concrete implementation that serializes to a flat binary blob. + */ +class SkBinaryWriteBuffer : public SkWriteBuffer { +public: + SkBinaryWriteBuffer(); + SkBinaryWriteBuffer(void* initialStorage, size_t storageSize); + ~SkBinaryWriteBuffer() override; + + void write(const void* buffer, size_t bytes) { + fWriter.write(buffer, bytes); + } + void writePad32(const void* buffer, size_t bytes) override { + fWriter.writePad(buffer, bytes); + } + + void reset(void* storage = nullptr, size_t storageSize = 0) { + fWriter.reset(storage, storageSize); + } + + size_t bytesWritten() const { return fWriter.bytesWritten(); } + + // Returns true iff all of the bytes written so far are stored in the initial storage + // buffer provided in the constructor or the most recent call to reset. + bool usingInitialStorage() const; + + void writeByteArray(const void* data, size_t size) override; + void writeBool(bool value) override; + void writeScalar(SkScalar value) override; + void writeScalarArray(const SkScalar* value, uint32_t count) override; + void writeInt(int32_t value) override; + void writeIntArray(const int32_t* value, uint32_t count) override; + void writeUInt(uint32_t value) override; + void writeString(std::string_view value) override; + + void writeFlattenable(const SkFlattenable* flattenable) override; + void writeColor(SkColor color) override; + void writeColorArray(const SkColor* color, uint32_t count) override; + void writeColor4f(const SkColor4f& color) override; + void writeColor4fArray(const SkColor4f* color, uint32_t count) override; + void writePoint(const SkPoint& point) override; + void writePointArray(const SkPoint* point, uint32_t count) override; + void writePoint3(const SkPoint3& point) override; + void write(const SkM44&) override; + void writeMatrix(const SkMatrix& matrix) override; + void writeIRect(const SkIRect& rect) override; + void writeRect(const SkRect& rect) override; + void writeRegion(const SkRegion& region) override; + void writeSampling(const SkSamplingOptions&) override; + void writePath(const SkPath& path) override; + size_t writeStream(SkStream* stream, size_t length) override; + void writeImage(const SkImage*) override; + void writeTypeface(SkTypeface* typeface) override; + void writePaint(const SkPaint& paint) override; + + bool writeToStream(SkWStream*) const; + void writeToMemory(void* dst) const { fWriter.flatten(dst); } + sk_sp snapshotAsData() const { return fWriter.snapshotAsData(); } + + void setFactoryRecorder(sk_sp); + void setTypefaceRecorder(sk_sp); + +private: + sk_sp fFactorySet; + sk_sp fTFSet; + + SkWriter32 fWriter; + + // Only used if we do not have an fFactorySet + SkTHashMap fFlattenableDict; +}; + +enum SkWriteBufferImageFlags { + kVersion_bits = 8, + kCurrVersion = 0, + + kHasSubsetRect = 1 << 8, + kHasMipmap = 1 << 9, + kUnpremul = 1 << 10, +}; + + +#endif // SkWriteBuffer_DEFINED diff --git a/gfx/skia/skia/src/core/SkWritePixelsRec.cpp b/gfx/skia/skia/src/core/SkWritePixelsRec.cpp new file mode 100644 index 0000000000..20b2003f59 --- /dev/null +++ b/gfx/skia/skia/src/core/SkWritePixelsRec.cpp @@ -0,0 +1,43 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkWritePixelsRec.h" + +#include "include/core/SkRect.h" + +bool SkWritePixelsRec::trim(int dstWidth, int dstHeight) { + if (nullptr == fPixels || fRowBytes < fInfo.minRowBytes()) { + return false; + } + if (0 >= fInfo.width() || 0 >= fInfo.height()) { + return false; + } + + int x = fX; + int y = fY; + SkIRect dstR = SkIRect::MakeXYWH(x, y, fInfo.width(), fInfo.height()); + if (!dstR.intersect({0, 0, dstWidth, dstHeight})) { + return false; + } + + // if x or y are negative, then we have to adjust pixels + if (x > 0) { + x = 0; + } + if (y > 0) { + y = 0; + } + // here x,y are either 0 or negative + // we negate and add them so UBSAN (pointer-overflow) doesn't get confused. + fPixels = ((const char*)fPixels + -y*fRowBytes + -x*fInfo.bytesPerPixel()); + // the intersect may have shrunk info's logical size + fInfo = fInfo.makeDimensions(dstR.size()); + fX = dstR.x(); + fY = dstR.y(); + + return true; +} diff --git a/gfx/skia/skia/src/core/SkWritePixelsRec.h b/gfx/skia/skia/src/core/SkWritePixelsRec.h new file mode 100644 index 0000000000..1d191e5c8d --- /dev/null +++ b/gfx/skia/skia/src/core/SkWritePixelsRec.h @@ -0,0 +1,52 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkWritePixelsRec_DEFINED +#define SkWritePixelsRec_DEFINED + +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" + +#include + +/** + * Helper class to package and trim the parameters passed to writePixels() + */ +struct SkWritePixelsRec { + SkWritePixelsRec(const SkImageInfo& info, const void* pixels, size_t rowBytes, int x, int y) + : fPixels(pixels) + , fRowBytes(rowBytes) + , fInfo(info) + , fX(x) + , fY(y) + {} + + SkWritePixelsRec(const SkPixmap& pm, int x, int y) + : fPixels(pm.addr()) + , fRowBytes(pm.rowBytes()) + , fInfo(pm.info()) + , fX(x) + , fY(y) + {} + + const void* fPixels; + size_t fRowBytes; + SkImageInfo fInfo; + int fX; + int fY; + + /* + * On true, may have modified its fields (except fRowBytes) to make it a legal subset + * of the specified dst width/height. + * + * On false, leaves self unchanged, but indicates that it does not overlap dst, or + * is not valid (e.g. bad fInfo) for writePixels(). + */ + bool trim(int dstWidth, int dstHeight); +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkWriter32.cpp b/gfx/skia/skia/src/core/SkWriter32.cpp new file mode 100644 index 0000000000..50765f3741 --- /dev/null +++ b/gfx/skia/skia/src/core/SkWriter32.cpp @@ -0,0 +1,76 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkWriter32.h" + +#include "include/core/SkSamplingOptions.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkMatrixPriv.h" + +void SkWriter32::writeMatrix(const SkMatrix& matrix) { + size_t size = SkMatrixPriv::WriteToMemory(matrix, nullptr); + SkASSERT(SkAlign4(size) == size); + SkMatrixPriv::WriteToMemory(matrix, this->reserve(size)); +} + +void SkWriter32::writeSampling(const SkSamplingOptions& sampling) { + this->write32(sampling.maxAniso); + if (!sampling.isAniso()) { + this->writeBool(sampling.useCubic); + if (sampling.useCubic) { + this->writeScalar(sampling.cubic.B); + this->writeScalar(sampling.cubic.C); + } else { + this->write32((unsigned)sampling.filter); + this->write32((unsigned)sampling.mipmap); + } + } +} + +void SkWriter32::writeString(const char str[], size_t len) { + if (nullptr == str) { + str = ""; + len = 0; + } + if ((long)len < 0) { + len = strlen(str); + } + + // [ 4 byte len ] [ str ... ] [1 - 4 \0s] + uint32_t* ptr = this->reservePad(sizeof(uint32_t) + len + 1); + *ptr = SkToU32(len); + char* chars = (char*)(ptr + 1); + memcpy(chars, str, len); + chars[len] = '\0'; +} + +size_t SkWriter32::WriteStringSize(const char* str, size_t len) { + if ((long)len < 0) { + SkASSERT(str); + len = strlen(str); + } + const size_t lenBytes = 4; // we use 4 bytes to record the length + // add 1 since we also write a terminating 0 + return SkAlign4(lenBytes + len + 1); +} + +void SkWriter32::growToAtLeast(size_t size) { + const bool wasExternal = (fExternal != nullptr) && (fData == fExternal); + + fCapacity = 4096 + std::max(size, fCapacity + (fCapacity / 2)); + fInternal.realloc(fCapacity); + fData = fInternal.get(); + + if (wasExternal) { + // we were external, so copy in the data + memcpy(fData, fExternal, fUsed); + } +} + +sk_sp SkWriter32::snapshotAsData() const { + return SkData::MakeWithCopy(fData, fUsed); +} diff --git a/gfx/skia/skia/src/core/SkWriter32.h b/gfx/skia/skia/src/core/SkWriter32.h new file mode 100644 index 0000000000..6b6e2c34f4 --- /dev/null +++ b/gfx/skia/skia/src/core/SkWriter32.h @@ -0,0 +1,279 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkWriter32_DEFINED +#define SkWriter32_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkRRect.h" +#include "include/core/SkRect.h" +#include "include/core/SkRegion.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" + +struct SkSamplingOptions; + +class SkWriter32 : SkNoncopyable { +public: + /** + * The caller can specify an initial block of storage, which the caller manages. + * + * SkWriter32 will try to back reserve and write calls with this external storage until the + * first time an allocation doesn't fit. From then it will use dynamically allocated storage. + * This used to be optional behavior, but pipe now relies on it. + */ + SkWriter32(void* external = nullptr, size_t externalBytes = 0) { + this->reset(external, externalBytes); + } + + // return the current offset (will always be a multiple of 4) + size_t bytesWritten() const { return fUsed; } + + // Returns true iff all of the bytes written so far are stored in the initial storage + // buffer provided in the constructor or the most recent call to reset. + bool usingInitialStorage() const { return fData == fExternal; } + + void reset(void* external = nullptr, size_t externalBytes = 0) { + // we cast this pointer to int* and float* at times, so assert that it is aligned. + SkASSERT(SkIsAlign4((uintptr_t)external)); + // we always write multiples of 4-bytes, so truncate down the size to match that + externalBytes &= ~3; + + fData = (uint8_t*)external; + fCapacity = externalBytes; + fUsed = 0; + fExternal = external; + } + + // size MUST be multiple of 4 + uint32_t* reserve(size_t size) { + SkASSERT(SkAlign4(size) == size); + size_t offset = fUsed; + size_t totalRequired = fUsed + size; + if (totalRequired > fCapacity) { + this->growToAtLeast(totalRequired); + } + fUsed = totalRequired; + return (uint32_t*)(fData + offset); + } + + /** + * Read a T record at offset, which must be a multiple of 4. Only legal if the record + * was written atomically using the write methods below. + */ + template + const T& readTAt(size_t offset) const { + SkASSERT(SkAlign4(offset) == offset); + SkASSERT(offset < fUsed); + return *(T*)(fData + offset); + } + + /** + * Overwrite a T record at offset, which must be a multiple of 4. Only legal if the record + * was written atomically using the write methods below. + */ + template + void overwriteTAt(size_t offset, const T& value) { + SkASSERT(SkAlign4(offset) == offset); + SkASSERT(offset < fUsed); + *(T*)(fData + offset) = value; + } + + bool writeBool(bool value) { + this->write32(value); + return value; + } + + void writeInt(int32_t value) { + this->write32(value); + } + + void write8(int32_t value) { + *(int32_t*)this->reserve(sizeof(value)) = value & 0xFF; + } + + void write16(int32_t value) { + *(int32_t*)this->reserve(sizeof(value)) = value & 0xFFFF; + } + + void write32(int32_t value) { + *(int32_t*)this->reserve(sizeof(value)) = value; + } + + void writeScalar(SkScalar value) { + *(SkScalar*)this->reserve(sizeof(value)) = value; + } + + void writePoint(const SkPoint& pt) { + *(SkPoint*)this->reserve(sizeof(pt)) = pt; + } + + void writePoint3(const SkPoint3& pt) { + *(SkPoint3*)this->reserve(sizeof(pt)) = pt; + } + + void writeRect(const SkRect& rect) { + *(SkRect*)this->reserve(sizeof(rect)) = rect; + } + + void writeIRect(const SkIRect& rect) { + *(SkIRect*)this->reserve(sizeof(rect)) = rect; + } + + void writeRRect(const SkRRect& rrect) { + rrect.writeToMemory(this->reserve(SkRRect::kSizeInMemory)); + } + + void writePath(const SkPath& path) { + size_t size = path.writeToMemory(nullptr); + SkASSERT(SkAlign4(size) == size); + path.writeToMemory(this->reserve(size)); + } + + void writeMatrix(const SkMatrix& matrix); + + void writeRegion(const SkRegion& rgn) { + size_t size = rgn.writeToMemory(nullptr); + SkASSERT(SkAlign4(size) == size); + rgn.writeToMemory(this->reserve(size)); + } + + void writeSampling(const SkSamplingOptions& sampling); + + // write count bytes (must be a multiple of 4) + void writeMul4(const void* values, size_t size) { + this->write(values, size); + } + + /** + * Write size bytes from values. size must be a multiple of 4, though + * values need not be 4-byte aligned. + */ + void write(const void* values, size_t size) { + SkASSERT(SkAlign4(size) == size); + sk_careful_memcpy(this->reserve(size), values, size); + } + + /** + * Reserve size bytes. Does not need to be 4 byte aligned. The remaining space (if any) will be + * filled in with zeroes. + */ + uint32_t* reservePad(size_t size) { + size_t alignedSize = SkAlign4(size); + uint32_t* p = this->reserve(alignedSize); + if (alignedSize != size) { + SkASSERT(alignedSize >= 4); + p[alignedSize / 4 - 1] = 0; + } + return p; + } + + /** + * Write size bytes from src, and pad to 4 byte alignment with zeroes. + */ + void writePad(const void* src, size_t size) { + sk_careful_memcpy(this->reservePad(size), src, size); + } + + /** + * Writes a string to the writer, which can be retrieved with SkReadBuffer::readString(). + * The length can be specified, or if -1 is passed, it will be computed by calling strlen(). + * The length must be < max size_t. + * + * If you write NULL, it will be read as "". + */ + void writeString(const char* str, size_t len = (size_t)-1); + + /** + * Computes the size (aligned to multiple of 4) need to write the string + * in a call to writeString(). If the length is not specified, it will be + * computed by calling strlen(). + */ + static size_t WriteStringSize(const char* str, size_t len = (size_t)-1); + + void writeData(const SkData* data) { + uint32_t len = data ? SkToU32(data->size()) : 0; + this->write32(len); + if (data) { + this->writePad(data->data(), len); + } + } + + static size_t WriteDataSize(const SkData* data) { + return 4 + SkAlign4(data ? data->size() : 0); + } + + /** + * Move the cursor back to offset bytes from the beginning. + * offset must be a multiple of 4 no greater than size(). + */ + void rewindToOffset(size_t offset) { + SkASSERT(SkAlign4(offset) == offset); + SkASSERT(offset <= bytesWritten()); + fUsed = offset; + } + + // copy into a single buffer (allocated by caller). Must be at least size() + void flatten(void* dst) const { + memcpy(dst, fData, fUsed); + } + + bool writeToStream(SkWStream* stream) const { + return stream->write(fData, fUsed); + } + + // read from the stream, and write up to length bytes. Return the actual + // number of bytes written. + size_t readFromStream(SkStream* stream, size_t length) { + return stream->read(this->reservePad(length), length); + } + + /** + * Captures a snapshot of the data as it is right now, and return it. + */ + sk_sp snapshotAsData() const; +private: + void growToAtLeast(size_t size); + + uint8_t* fData; // Points to either fInternal or fExternal. + size_t fCapacity; // Number of bytes we can write to fData. + size_t fUsed; // Number of bytes written. + void* fExternal; // Unmanaged memory block. + skia_private::AutoTMalloc fInternal; // Managed memory block. +}; + +/** + * Helper class to allocated SIZE bytes as part of the writer, and to provide + * that storage to the constructor as its initial storage buffer. + * + * This wrapper ensures proper alignment rules are met for the storage. + */ +template class SkSWriter32 : public SkWriter32 { +public: + SkSWriter32() { this->reset(); } + + void reset() {this->INHERITED::reset(fData.fStorage, SIZE); } + +private: + union { + void* fPtrAlignment; + double fDoubleAlignment; + char fStorage[SIZE]; + } fData; + + using INHERITED = SkWriter32; +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkXfermode.cpp b/gfx/skia/skia/src/core/SkXfermode.cpp new file mode 100644 index 0000000000..99684db1e8 --- /dev/null +++ b/gfx/skia/skia/src/core/SkXfermode.cpp @@ -0,0 +1,172 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkString.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkOnce.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkOpts.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/core/SkXfermodePriv.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrCustomXfermode.h" +#include "src/gpu/ganesh/effects/GrPorterDuffXferProcessor.h" +#endif + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +class SkProcCoeffXfermode : public SkXfermode { +public: + SkProcCoeffXfermode(SkBlendMode mode) : fMode(mode) {} + + void xfer32(SkPMColor dst[], const SkPMColor src[], int count, + const SkAlpha aa[]) const override { + SkASSERT(dst && src && count >= 0); + + SkRasterPipeline_<256> p; + + SkRasterPipeline_MemoryCtx dst_ctx = { (void*)dst, 0 }, + src_ctx = { (void*)src, 0 }, + aa_ctx = { (void*)aa, 0 }; + + p.append_load (kN32_SkColorType, &src_ctx); + p.append_load_dst(kN32_SkColorType, &dst_ctx); + + if (SkBlendMode_ShouldPreScaleCoverage(fMode, /*rgb_coverage=*/false)) { + if (aa) { + p.append(SkRasterPipelineOp::scale_u8, &aa_ctx); + } + SkBlendMode_AppendStages(fMode, &p); + } else { + SkBlendMode_AppendStages(fMode, &p); + if (aa) { + p.append(SkRasterPipelineOp::lerp_u8, &aa_ctx); + } + } + + p.append_store(kN32_SkColorType, &dst_ctx); + p.run(0, 0, count,1); + } + +private: + const SkBlendMode fMode; + + using INHERITED = SkXfermode; +}; + +const char* SkBlendMode_Name(SkBlendMode bm) { + switch (bm) { + case SkBlendMode::kClear: return "Clear"; + case SkBlendMode::kSrc: return "Src"; + case SkBlendMode::kDst: return "Dst"; + case SkBlendMode::kSrcOver: return "SrcOver"; + case SkBlendMode::kDstOver: return "DstOver"; + case SkBlendMode::kSrcIn: return "SrcIn"; + case SkBlendMode::kDstIn: return "DstIn"; + case SkBlendMode::kSrcOut: return "SrcOut"; + case SkBlendMode::kDstOut: return "DstOut"; + case SkBlendMode::kSrcATop: return "SrcATop"; + case SkBlendMode::kDstATop: return "DstATop"; + case SkBlendMode::kXor: return "Xor"; + case SkBlendMode::kPlus: return "Plus"; + case SkBlendMode::kModulate: return "Modulate"; + case SkBlendMode::kScreen: return "Screen"; + + case SkBlendMode::kOverlay: return "Overlay"; + case SkBlendMode::kDarken: return "Darken"; + case SkBlendMode::kLighten: return "Lighten"; + case SkBlendMode::kColorDodge: return "ColorDodge"; + case SkBlendMode::kColorBurn: return "ColorBurn"; + case SkBlendMode::kHardLight: return "HardLight"; + case SkBlendMode::kSoftLight: return "SoftLight"; + case SkBlendMode::kDifference: return "Difference"; + case SkBlendMode::kExclusion: return "Exclusion"; + case SkBlendMode::kMultiply: return "Multiply"; + + case SkBlendMode::kHue: return "Hue"; + case SkBlendMode::kSaturation: return "Saturation"; + case SkBlendMode::kColor: return "Color"; + case SkBlendMode::kLuminosity: return "Luminosity"; + } + SkUNREACHABLE; +} + +sk_sp SkXfermode::Make(SkBlendMode mode) { + if ((unsigned)mode > (unsigned)SkBlendMode::kLastMode) { + // report error + return nullptr; + } + + // Skia's "default" mode is srcover. nullptr in SkPaint is interpreted as srcover + // so we can just return nullptr from the factory. + if (SkBlendMode::kSrcOver == mode) { + return nullptr; + } + + static SkOnce once[kSkBlendModeCount]; + static SkXfermode* cached[kSkBlendModeCount]; + + once[(int)mode]([mode] { + if (auto xfermode = SkOpts::create_xfermode(mode)) { + cached[(int)mode] = xfermode; + } else { + cached[(int)mode] = new SkProcCoeffXfermode(mode); + } + }); + return sk_ref_sp(cached[(int)mode]); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkXfermode::IsOpaque(SkBlendMode mode, SrcColorOpacity opacityType) { + SkBlendModeCoeff src, dst; + if (!SkBlendMode_AsCoeff(mode, &src, &dst)) { + return false; + } + + switch (src) { + case SkBlendModeCoeff::kDA: + case SkBlendModeCoeff::kDC: + case SkBlendModeCoeff::kIDA: + case SkBlendModeCoeff::kIDC: + return false; + default: + break; + } + + switch (dst) { + case SkBlendModeCoeff::kZero: + return true; + case SkBlendModeCoeff::kISA: + return kOpaque_SrcColorOpacity == opacityType; + case SkBlendModeCoeff::kSA: + return kTransparentBlack_SrcColorOpacity == opacityType || + kTransparentAlpha_SrcColorOpacity == opacityType; + case SkBlendModeCoeff::kSC: + return kTransparentBlack_SrcColorOpacity == opacityType; + default: + return false; + } +} + +#if defined(SK_GANESH) +const GrXPFactory* SkBlendMode_AsXPFactory(SkBlendMode mode) { + if (SkBlendMode_AsCoeff(mode, nullptr, nullptr)) { + const GrXPFactory* result = GrPorterDuffXPFactory::Get(mode); + SkASSERT(result); + return result; + } + + SkASSERT(GrCustomXfermode::IsSupportedMode(mode)); + return GrCustomXfermode::Get(mode); +} +#endif diff --git a/gfx/skia/skia/src/core/SkXfermodeInterpretation.cpp b/gfx/skia/skia/src/core/SkXfermodeInterpretation.cpp new file mode 100644 index 0000000000..607f4c995d --- /dev/null +++ b/gfx/skia/skia/src/core/SkXfermodeInterpretation.cpp @@ -0,0 +1,50 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkXfermodeInterpretation.h" + +#include "include/core/SkBlendMode.h" +#include "include/core/SkPaint.h" + +static bool just_solid_color(const SkPaint& p) { + return SK_AlphaOPAQUE == p.getAlpha() && !p.getColorFilter() && !p.getShader(); +} + +SkXfermodeInterpretation SkInterpretXfermode(const SkPaint& paint, bool dstIsOpaque) { + const auto bm = paint.asBlendMode(); + if (!bm) { + return kNormal_SkXfermodeInterpretation; + } + switch (bm.value()) { + case SkBlendMode::kSrcOver: + return kSrcOver_SkXfermodeInterpretation; + case SkBlendMode::kSrc: + if (just_solid_color(paint)) { + return kSrcOver_SkXfermodeInterpretation; + } + return kNormal_SkXfermodeInterpretation; + case SkBlendMode::kDst: + return kSkipDrawing_SkXfermodeInterpretation; + case SkBlendMode::kDstOver: + if (dstIsOpaque) { + return kSkipDrawing_SkXfermodeInterpretation; + } + return kNormal_SkXfermodeInterpretation; + case SkBlendMode::kSrcIn: + if (dstIsOpaque && just_solid_color(paint)) { + return kSrcOver_SkXfermodeInterpretation; + } + return kNormal_SkXfermodeInterpretation; + case SkBlendMode::kDstIn: + if (just_solid_color(paint)) { + return kSkipDrawing_SkXfermodeInterpretation; + } + return kNormal_SkXfermodeInterpretation; + default: + return kNormal_SkXfermodeInterpretation; + } +} diff --git a/gfx/skia/skia/src/core/SkXfermodeInterpretation.h b/gfx/skia/skia/src/core/SkXfermodeInterpretation.h new file mode 100644 index 0000000000..d0a420f383 --- /dev/null +++ b/gfx/skia/skia/src/core/SkXfermodeInterpretation.h @@ -0,0 +1,30 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkXfermodeInterpretation_DEFINED +#define SkXfermodeInterpretation_DEFINED + +class SkPaint; + +/** + * By analyzing the paint, we may decide we can take special + * action. This enum lists our possible actions. + */ +enum SkXfermodeInterpretation { + kNormal_SkXfermodeInterpretation, //< draw normally + kSrcOver_SkXfermodeInterpretation, //< draw as if in srcover mode + kSkipDrawing_SkXfermodeInterpretation //< draw nothing +}; + +/** + * Given a paint, determine whether the paint's transfer mode can be + * replaced with kSrcOver_Mode or not drawn at all. This is used by + * SkBlitter and SkPDFDevice. + */ +SkXfermodeInterpretation SkInterpretXfermode(const SkPaint&, bool dstIsOpaque); + +#endif // SkXfermodeInterpretation_DEFINED diff --git a/gfx/skia/skia/src/core/SkXfermodePriv.h b/gfx/skia/skia/src/core/SkXfermodePriv.h new file mode 100644 index 0000000000..0b7a920d8e --- /dev/null +++ b/gfx/skia/skia/src/core/SkXfermodePriv.h @@ -0,0 +1,62 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkXfermodePriv_DEFINED +#define SkXfermodePriv_DEFINED + +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/core/SkRefCnt.h" + +class GrFragmentProcessor; +class GrTexture; +class GrXPFactory; +class SkRasterPipeline; +class SkString; + +class SkXfermode : public SkRefCnt { +public: + virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count, + const SkAlpha aa[]) const = 0; + + /** Return an SkXfermode object for the specified mode. + */ + static sk_sp Make(SkBlendMode); + + /** + * Skia maintains global xfermode objects corresponding to each BlendMode. This returns a + * ptr to that global xfermode (or null if the mode is srcover). Thus the caller may use + * the returned ptr, but it should leave its refcnt untouched. + */ + static SkXfermode* Peek(SkBlendMode mode) { + sk_sp xfer = Make(mode); + if (!xfer) { + SkASSERT(SkBlendMode::kSrcOver == mode); + return nullptr; + } + SkASSERT(!xfer->unique()); + return xfer.get(); + } + + enum SrcColorOpacity { + // The src color is known to be opaque (alpha == 255) + kOpaque_SrcColorOpacity = 0, + // The src color is known to be fully transparent (color == 0) + kTransparentBlack_SrcColorOpacity = 1, + // The src alpha is known to be fully transparent (alpha == 0) + kTransparentAlpha_SrcColorOpacity = 2, + // The src color opacity is unknown + kUnknown_SrcColorOpacity = 3 + }; + + static bool IsOpaque(SkBlendMode, SrcColorOpacity); + +protected: + SkXfermode() {} +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkYUVAInfo.cpp b/gfx/skia/skia/src/core/SkYUVAInfo.cpp new file mode 100644 index 0000000000..17367ce126 --- /dev/null +++ b/gfx/skia/skia/src/core/SkYUVAInfo.cpp @@ -0,0 +1,376 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkYUVAInfo.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkYUVAInfoLocation.h" + +#include + +static bool is_plane_config_compatible_with_subsampling(SkYUVAInfo::PlaneConfig config, + SkYUVAInfo::Subsampling subsampling) { + if (config == SkYUVAInfo::PlaneConfig::kUnknown || + subsampling == SkYUVAInfo::Subsampling::kUnknown) { + return false; + } + return subsampling == SkYUVAInfo::Subsampling::k444 || + (config != SkYUVAInfo::PlaneConfig::kYUV && + config != SkYUVAInfo::PlaneConfig::kYUVA && + config != SkYUVAInfo::PlaneConfig::kUYV && + config != SkYUVAInfo::PlaneConfig::kUYVA); +} + +std::tuple SkYUVAInfo::SubsamplingFactors(Subsampling subsampling) { + switch (subsampling) { + case Subsampling::kUnknown: return {0, 0}; + case Subsampling::k444: return {1, 1}; + case Subsampling::k422: return {2, 1}; + case Subsampling::k420: return {2, 2}; + case Subsampling::k440: return {1, 2}; + case Subsampling::k411: return {4, 1}; + case Subsampling::k410: return {4, 2}; + } + SkUNREACHABLE; +} + +std::tuple SkYUVAInfo::PlaneSubsamplingFactors(PlaneConfig planeConfig, + Subsampling subsampling, + int planeIdx) { + if (!is_plane_config_compatible_with_subsampling(planeConfig, subsampling) || + planeIdx < 0 || + planeIdx > NumPlanes(planeConfig)) { + return {0, 0}; + } + bool isSubsampledPlane = false; + switch (planeConfig) { + case PlaneConfig::kUnknown: SkUNREACHABLE; + + case PlaneConfig::kY_U_V: + case PlaneConfig::kY_V_U: + case PlaneConfig::kY_U_V_A: + case PlaneConfig::kY_V_U_A: + isSubsampledPlane = planeIdx == 1 || planeIdx == 2; + break; + + case PlaneConfig::kY_UV: + case PlaneConfig::kY_VU: + case PlaneConfig::kY_UV_A: + case PlaneConfig::kY_VU_A: + isSubsampledPlane = planeIdx == 1; + break; + + case PlaneConfig::kYUV: + case PlaneConfig::kUYV: + case PlaneConfig::kYUVA: + case PlaneConfig::kUYVA: + break; + } + return isSubsampledPlane ? SubsamplingFactors(subsampling) : std::make_tuple(1, 1); +} + +int SkYUVAInfo::PlaneDimensions(SkISize imageDimensions, + PlaneConfig planeConfig, + Subsampling subsampling, + SkEncodedOrigin origin, + SkISize planeDimensions[SkYUVAInfo::kMaxPlanes]) { + std::fill_n(planeDimensions, SkYUVAInfo::kMaxPlanes, SkISize{0, 0}); + if (!is_plane_config_compatible_with_subsampling(planeConfig, subsampling)) { + return 0; + } + + int w = imageDimensions.width(); + int h = imageDimensions.height(); + if (origin >= kLeftTop_SkEncodedOrigin) { + using std::swap; + swap(w, h); + } + auto down2 = [](int x) { return (x + 1)/2; }; + auto down4 = [](int x) { return (x + 3)/4; }; + SkISize uvSize; + switch (subsampling) { + case Subsampling::kUnknown: SkUNREACHABLE; + + case Subsampling::k444: uvSize = { w , h }; break; + case Subsampling::k422: uvSize = {down2(w), h }; break; + case Subsampling::k420: uvSize = {down2(w), down2(h)}; break; + case Subsampling::k440: uvSize = { w , down2(h)}; break; + case Subsampling::k411: uvSize = {down4(w), h }; break; + case Subsampling::k410: uvSize = {down4(w), down2(h)}; break; + } + switch (planeConfig) { + case PlaneConfig::kUnknown: SkUNREACHABLE; + + case PlaneConfig::kY_U_V: + case PlaneConfig::kY_V_U: + planeDimensions[0] = {w, h}; + planeDimensions[1] = planeDimensions[2] = uvSize; + return 3; + + case PlaneConfig::kY_UV: + case PlaneConfig::kY_VU: + planeDimensions[0] = {w, h}; + planeDimensions[1] = uvSize; + return 2; + + case PlaneConfig::kY_U_V_A: + case PlaneConfig::kY_V_U_A: + planeDimensions[0] = planeDimensions[3] = {w, h}; + planeDimensions[1] = planeDimensions[2] = uvSize; + return 4; + + case PlaneConfig::kY_UV_A: + case PlaneConfig::kY_VU_A: + planeDimensions[0] = planeDimensions[2] = {w, h}; + planeDimensions[1] = uvSize; + return 3; + + case PlaneConfig::kYUV: + case PlaneConfig::kUYV: + case PlaneConfig::kYUVA: + case PlaneConfig::kUYVA: + planeDimensions[0] = {w, h}; + SkASSERT(planeDimensions[0] == uvSize); + return 1; + } + SkUNREACHABLE; +} + +static bool channel_index_to_channel(uint32_t channelFlags, + int channelIdx, + SkColorChannel* channel) { + switch (channelFlags) { + case kGray_SkColorChannelFlag: // For gray returning any of R, G, or B for index 0 is ok. + case kRed_SkColorChannelFlag: + if (channelIdx == 0) { + *channel = SkColorChannel::kR; + return true; + } + return false; + case kGrayAlpha_SkColorChannelFlags: + switch (channelIdx) { + case 0: *channel = SkColorChannel::kR; return true; + case 1: *channel = SkColorChannel::kA; return true; + + default: return false; + } + case kAlpha_SkColorChannelFlag: + if (channelIdx == 0) { + *channel = SkColorChannel::kA; + return true; + } + return false; + case kRG_SkColorChannelFlags: + if (channelIdx == 0 || channelIdx == 1) { + *channel = static_cast(channelIdx); + return true; + } + return false; + case kRGB_SkColorChannelFlags: + if (channelIdx >= 0 && channelIdx <= 2) { + *channel = static_cast(channelIdx); + return true; + } + return false; + case kRGBA_SkColorChannelFlags: + if (channelIdx >= 0 && channelIdx <= 3) { + *channel = static_cast(channelIdx); + return true; + } + return false; + default: + return false; + } +} + +SkYUVAInfo::YUVALocations SkYUVAInfo::GetYUVALocations(PlaneConfig config, + const uint32_t* planeChannelFlags) { + // Like YUVALocation but chanIdx refers to channels by index rather than absolute channel, e.g. + // A is the 0th channel of an alpha-only texture. We'll use this plus planeChannelFlags to get + // the actual channel. + struct PlaneAndIndex {int plane, chanIdx;}; + const PlaneAndIndex* planesAndIndices = nullptr; + switch (config) { + case PlaneConfig::kUnknown: + return {}; + + case PlaneConfig::kY_U_V: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {1, 0}, {2, 0}, {-1, -1}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kY_V_U: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {2, 0}, {1, 0}, {-1, -1}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kY_UV: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {1, 0}, {1, 1}, {-1, -1}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kY_VU: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {1, 1}, {1, 0}, {-1, -1}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kYUV: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {0, 1}, {0, 2}, {-1, -1}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kUYV: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 1}, {0, 0}, {0, 2}, {-1, -1}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kY_U_V_A: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {1, 0}, {2, 0}, {3, 0}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kY_V_U_A: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {2, 0}, {1, 0}, {3, 0}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kY_UV_A: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {1, 0}, {1, 1}, {2, 0}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kY_VU_A: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {1, 1}, {1, 0}, {2, 0}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kYUVA: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 0}, {0, 1}, {0, 2}, {0, 3}}; + planesAndIndices = kPlanesAndIndices; + break; + } + case PlaneConfig::kUYVA: { + static constexpr PlaneAndIndex kPlanesAndIndices[] = {{0, 1}, {0, 0}, {0, 2}, {0, 3}}; + planesAndIndices = kPlanesAndIndices; + break; + } + } + SkASSERT(planesAndIndices); + YUVALocations yuvaLocations; + for (int i = 0; i < SkYUVAInfo::kYUVAChannelCount; ++i) { + auto [plane, chanIdx] = planesAndIndices[i]; + SkColorChannel channel; + if (plane >= 0) { + if (!channel_index_to_channel(planeChannelFlags[plane], chanIdx, &channel)) { + return {}; + } + yuvaLocations[i] = {plane, channel}; + } else { + SkASSERT(i == 3); + yuvaLocations[i] = {-1, SkColorChannel::kR}; + } + } + return yuvaLocations; +} + +bool SkYUVAInfo::HasAlpha(PlaneConfig planeConfig) { + switch (planeConfig) { + case PlaneConfig::kUnknown: return false; + + case PlaneConfig::kY_U_V: return false; + case PlaneConfig::kY_V_U: return false; + case PlaneConfig::kY_UV: return false; + case PlaneConfig::kY_VU: return false; + case PlaneConfig::kYUV: return false; + case PlaneConfig::kUYV: return false; + + case PlaneConfig::kY_U_V_A: return true; + case PlaneConfig::kY_V_U_A: return true; + case PlaneConfig::kY_UV_A: return true; + case PlaneConfig::kY_VU_A: return true; + case PlaneConfig::kYUVA: return true; + case PlaneConfig::kUYVA: return true; + } + SkUNREACHABLE; +} + +SkYUVAInfo::SkYUVAInfo(SkISize dimensions, + PlaneConfig planeConfig, + Subsampling subsampling, + SkYUVColorSpace yuvColorSpace, + SkEncodedOrigin origin, + Siting sitingX, + Siting sitingY) + : fDimensions(dimensions) + , fPlaneConfig(planeConfig) + , fSubsampling(subsampling) + , fYUVColorSpace(yuvColorSpace) + , fOrigin(origin) + , fSitingX(sitingX) + , fSitingY(sitingY) { + if (fDimensions.isEmpty() || + !is_plane_config_compatible_with_subsampling(planeConfig, subsampling)) { + *this = {}; + SkASSERT(!this->isValid()); + return; + } + SkASSERT(this->isValid()); +} + +size_t SkYUVAInfo::computeTotalBytes(const size_t rowBytes[kMaxPlanes], + size_t planeSizes[kMaxPlanes]) const { + if (!this->isValid()) { + return 0; + } + SkSafeMath safe; + size_t totalBytes = 0; + SkISize planeDimensions[kMaxPlanes]; + int n = this->planeDimensions(planeDimensions); + for (int i = 0; i < n; ++i) { + SkASSERT(!planeDimensions[i].isEmpty()); + SkASSERT(rowBytes[i]); + size_t size = safe.mul(rowBytes[i], planeDimensions[i].height()); + if (planeSizes) { + planeSizes[i] = size; + } + totalBytes = safe.add(totalBytes, size); + } + if (planeSizes) { + if (safe.ok()) { + for (int i = n; i < kMaxPlanes; ++i) { + planeSizes[i] = 0; + } + } else { + for (int i = 0; n < kMaxPlanes; ++i) { + planeSizes[i] = SIZE_MAX; + } + } + } + + return safe.ok() ? totalBytes : SIZE_MAX; +} + +SkYUVAInfo::YUVALocations SkYUVAInfo::toYUVALocations(const uint32_t* channelFlags) const { + return GetYUVALocations(fPlaneConfig, channelFlags); +} + +SkYUVAInfo SkYUVAInfo::makeSubsampling(SkYUVAInfo::Subsampling subsampling) const { + return {fDimensions, fPlaneConfig, subsampling, fYUVColorSpace, fOrigin, fSitingX, fSitingY}; +} + +SkYUVAInfo SkYUVAInfo::makeDimensions(SkISize dimensions) const { + return {dimensions, fPlaneConfig, fSubsampling, fYUVColorSpace, fOrigin, fSitingX, fSitingY}; +} + +bool SkYUVAInfo::operator==(const SkYUVAInfo& that) const { + return fPlaneConfig == that.fPlaneConfig && + fSubsampling == that.fSubsampling && + fYUVColorSpace == that.fYUVColorSpace && + fDimensions == that.fDimensions && + fSitingX == that.fSitingX && + fSitingY == that.fSitingY && + fOrigin == that.fOrigin; +} diff --git a/gfx/skia/skia/src/core/SkYUVAInfoLocation.h b/gfx/skia/skia/src/core/SkYUVAInfoLocation.h new file mode 100644 index 0000000000..5e52eb7400 --- /dev/null +++ b/gfx/skia/skia/src/core/SkYUVAInfoLocation.h @@ -0,0 +1,63 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkYUVAInfoLocation_DEFINED +#define SkYUVAInfoLocation_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkYUVAInfo.h" + +#include + +/** + * The location of Y, U, V, or A values within the planes described by SkYUVAInfo. Computed from a + * SkYUVAInfo and the set of channels present in a set of pixmaps/textures. + */ +struct SkYUVAInfo::YUVALocation { + /** The index of the plane where the Y, U, V, or A value is to be found. */ + int fPlane = -1; + /** The channel in the plane that contains the Y, U, V, or A value. */ + SkColorChannel fChannel = SkColorChannel::kA; + + bool operator==(const YUVALocation& that) const { + return fPlane == that.fPlane && fChannel == that.fChannel; + } + bool operator!=(const YUVALocation& that) const { return !(*this == that); } + + static bool AreValidLocations(const SkYUVAInfo::YUVALocations& locations, + int* numPlanes = nullptr) { + int maxSlotUsed = -1; + bool used[SkYUVAInfo::kMaxPlanes] = {}; + bool valid = true; + for (int i = 0; i < SkYUVAInfo::kYUVAChannelCount; ++i) { + if (locations[i].fPlane < 0) { + if (i != SkYUVAInfo::YUVAChannels::kA) { + valid = false; // only the 'A' plane can be omitted + } + } else if (locations[i].fPlane >= SkYUVAInfo::kMaxPlanes) { + valid = false; // A maximum of four input textures is allowed + } else { + maxSlotUsed = std::max(locations[i].fPlane, maxSlotUsed); + used[i] = true; + } + } + + // All the used slots should be packed starting at 0 with no gaps + for (int i = 0; i <= maxSlotUsed; ++i) { + if (!used[i]) { + valid = false; + } + } + + if (numPlanes) { + *numPlanes = valid ? maxSlotUsed + 1 : 0; + } + return valid; + } +}; + +#endif diff --git a/gfx/skia/skia/src/core/SkYUVAPixmaps.cpp b/gfx/skia/skia/src/core/SkYUVAPixmaps.cpp new file mode 100644 index 0000000000..aed0aea289 --- /dev/null +++ b/gfx/skia/skia/src/core/SkYUVAPixmaps.cpp @@ -0,0 +1,297 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkYUVAPixmaps.h" + +#include "src/base/SkRectMemcpy.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkYUVAInfoLocation.h" + +#if defined(SK_GANESH) +#include "include/private/gpu/ganesh/GrImageContext.h" +#endif + + +SkYUVAPixmapInfo::SupportedDataTypes::SupportedDataTypes(const GrImageContext& context) { +#if defined(SK_GANESH) + for (int n = 1; n <= 4; ++n) { + if (context.defaultBackendFormat(DefaultColorTypeForDataType(DataType::kUnorm8, n), + GrRenderable::kNo).isValid()) { + this->enableDataType(DataType::kUnorm8, n); + } + if (context.defaultBackendFormat(DefaultColorTypeForDataType(DataType::kUnorm16, n), + GrRenderable::kNo).isValid()) { + this->enableDataType(DataType::kUnorm16, n); + } + if (context.defaultBackendFormat(DefaultColorTypeForDataType(DataType::kFloat16, n), + GrRenderable::kNo).isValid()) { + this->enableDataType(DataType::kFloat16, n); + } + if (context.defaultBackendFormat(DefaultColorTypeForDataType(DataType::kUnorm10_Unorm2, n), + GrRenderable::kNo).isValid()) { + this->enableDataType(DataType::kUnorm10_Unorm2, n); + } + } +#endif +} + +void SkYUVAPixmapInfo::SupportedDataTypes::enableDataType(DataType type, int numChannels) { + if (numChannels < 1 || numChannels > 4) { + return; + } + fDataTypeSupport[static_cast(type) + (numChannels - 1)*kDataTypeCnt] = true; +} + +////////////////////////////////////////////////////////////////////////////// + +std::tuple SkYUVAPixmapInfo::NumChannelsAndDataType( + SkColorType ct) { + // We could allow BGR[A] color types, but then we'd have to decide whether B should be the 0th + // or 2nd channel. Our docs currently say channel order is always R=0, G=1, B=2[, A=3]. + switch (ct) { + case kAlpha_8_SkColorType: + case kGray_8_SkColorType: return {1, DataType::kUnorm8 }; + case kA16_unorm_SkColorType: return {1, DataType::kUnorm16}; + case kA16_float_SkColorType: return {1, DataType::kFloat16}; + + case kR8G8_unorm_SkColorType: return {2, DataType::kUnorm8 }; + case kR16G16_unorm_SkColorType: return {2, DataType::kUnorm16 }; + case kR16G16_float_SkColorType: return {2, DataType::kFloat16 }; + + case kRGB_888x_SkColorType: return {3, DataType::kUnorm8 }; + case kRGB_101010x_SkColorType: return {3, DataType::kUnorm10_Unorm2 }; + + case kRGBA_8888_SkColorType: return {4, DataType::kUnorm8 }; + case kR16G16B16A16_unorm_SkColorType: return {4, DataType::kUnorm16 }; + case kRGBA_F16_SkColorType: return {4, DataType::kFloat16 }; + case kRGBA_F16Norm_SkColorType: return {4, DataType::kFloat16 }; + case kRGBA_1010102_SkColorType: return {4, DataType::kUnorm10_Unorm2 }; + + default: return {0, DataType::kUnorm8 }; + } +} + +SkYUVAPixmapInfo::SkYUVAPixmapInfo(const SkYUVAInfo& yuvaInfo, + const SkColorType colorTypes[kMaxPlanes], + const size_t rowBytes[kMaxPlanes]) + : fYUVAInfo(yuvaInfo) { + if (!yuvaInfo.isValid()) { + *this = {}; + SkASSERT(!this->isValid()); + return; + } + SkISize planeDimensions[4]; + int n = yuvaInfo.planeDimensions(planeDimensions); + size_t tempRowBytes[kMaxPlanes]; + if (!rowBytes) { + for (int i = 0; i < n; ++i) { + tempRowBytes[i] = SkColorTypeBytesPerPixel(colorTypes[i]) * planeDimensions[i].width(); + } + rowBytes = tempRowBytes; + } + bool ok = true; + for (size_t i = 0; i < static_cast(n); ++i) { + fRowBytes[i] = rowBytes[i]; + // Use kUnpremul so that we never multiply alpha when copying data in. + fPlaneInfos[i] = SkImageInfo::Make(planeDimensions[i], + colorTypes[i], + kUnpremul_SkAlphaType); + int numRequiredChannels = yuvaInfo.numChannelsInPlane(i); + SkASSERT(numRequiredChannels > 0); + auto [numColorTypeChannels, colorTypeDataType] = NumChannelsAndDataType(colorTypes[i]); + ok &= i == 0 || colorTypeDataType == fDataType; + ok &= numColorTypeChannels >= numRequiredChannels; + ok &= fPlaneInfos[i].validRowBytes(fRowBytes[i]); + fDataType = colorTypeDataType; + } + if (!ok) { + *this = {}; + SkASSERT(!this->isValid()); + } else { + SkASSERT(this->isValid()); + } +} + +SkYUVAPixmapInfo::SkYUVAPixmapInfo(const SkYUVAInfo& yuvaInfo, + DataType dataType, + const size_t rowBytes[kMaxPlanes]) { + SkColorType colorTypes[kMaxPlanes] = {}; + int numPlanes = yuvaInfo.numPlanes(); + for (int i = 0; i < numPlanes; ++i) { + int numChannels = yuvaInfo.numChannelsInPlane(i); + colorTypes[i] = DefaultColorTypeForDataType(dataType, numChannels); + } + *this = SkYUVAPixmapInfo(yuvaInfo, colorTypes, rowBytes); +} + +bool SkYUVAPixmapInfo::operator==(const SkYUVAPixmapInfo& that) const { + bool result = fYUVAInfo == that.fYUVAInfo && + fPlaneInfos == that.fPlaneInfos && + fRowBytes == that.fRowBytes; + SkASSERT(!result || fDataType == that.fDataType); + return result; +} + +size_t SkYUVAPixmapInfo::computeTotalBytes(size_t planeSizes[kMaxPlanes]) const { + if (!this->isValid()) { + if (planeSizes) { + std::fill_n(planeSizes, kMaxPlanes, 0); + } + return 0; + } + return fYUVAInfo.computeTotalBytes(fRowBytes.data(), planeSizes); +} + +bool SkYUVAPixmapInfo::initPixmapsFromSingleAllocation(void* memory, + SkPixmap pixmaps[kMaxPlanes]) const { + if (!this->isValid()) { + return false; + } + SkASSERT(pixmaps); + char* addr = static_cast(memory); + int n = this->numPlanes(); + for (int i = 0; i < n; ++i) { + SkASSERT(fPlaneInfos[i].validRowBytes(fRowBytes[i])); + pixmaps[i].reset(fPlaneInfos[i], addr, fRowBytes[i]); + size_t planeSize = pixmaps[i].rowBytes()*pixmaps[i].height(); + SkASSERT(planeSize); + addr += planeSize; + } + for (int i = n; i < kMaxPlanes; ++i) { + pixmaps[i] = {}; + } + return true; +} + +bool SkYUVAPixmapInfo::isSupported(const SupportedDataTypes& supportedDataTypes) const { + if (!this->isValid()) { + return false; + } + return supportedDataTypes.supported(fYUVAInfo.planeConfig(), fDataType); +} + +////////////////////////////////////////////////////////////////////////////// + +SkColorType SkYUVAPixmaps::RecommendedRGBAColorType(DataType dataType) { + switch (dataType) { + case DataType::kUnorm8: return kRGBA_8888_SkColorType; + // F16 has better GPU support than 16 bit unorm. Often "16" bit unorm values are actually + // lower precision. + case DataType::kUnorm16: return kRGBA_F16_SkColorType; + case DataType::kFloat16: return kRGBA_F16_SkColorType; + case DataType::kUnorm10_Unorm2: return kRGBA_1010102_SkColorType; + } + SkUNREACHABLE; +} + +SkYUVAPixmaps SkYUVAPixmaps::Allocate(const SkYUVAPixmapInfo& yuvaPixmapInfo) { + if (!yuvaPixmapInfo.isValid()) { + return {}; + } + return SkYUVAPixmaps(yuvaPixmapInfo, + SkData::MakeUninitialized(yuvaPixmapInfo.computeTotalBytes())); +} + +SkYUVAPixmaps SkYUVAPixmaps::FromData(const SkYUVAPixmapInfo& yuvaPixmapInfo, sk_sp data) { + if (!yuvaPixmapInfo.isValid()) { + return {}; + } + if (yuvaPixmapInfo.computeTotalBytes() > data->size()) { + return {}; + } + return SkYUVAPixmaps(yuvaPixmapInfo, std::move(data)); +} + +SkYUVAPixmaps SkYUVAPixmaps::MakeCopy(const SkYUVAPixmaps& src) { + if (!src.isValid()) { + return {}; + } + SkYUVAPixmaps result = Allocate(src.pixmapsInfo()); + int n = result.numPlanes(); + for (int i = 0; i < n; ++i) { + // We use SkRectMemCpy rather than readPixels to ensure that we don't do any alpha type + // conversion. + const SkPixmap& s = src.plane(i); + const SkPixmap& d = result.plane(i); + SkRectMemcpy(d.writable_addr(), + d.rowBytes(), + s.addr(), + s.rowBytes(), + s.info().minRowBytes(), + s.height()); + } + return result; +} + +SkYUVAPixmaps SkYUVAPixmaps::FromExternalMemory(const SkYUVAPixmapInfo& yuvaPixmapInfo, + void* memory) { + if (!yuvaPixmapInfo.isValid()) { + return {}; + } + SkPixmap pixmaps[kMaxPlanes]; + yuvaPixmapInfo.initPixmapsFromSingleAllocation(memory, pixmaps); + return SkYUVAPixmaps(yuvaPixmapInfo.yuvaInfo(), yuvaPixmapInfo.dataType(), pixmaps); +} + +SkYUVAPixmaps SkYUVAPixmaps::FromExternalPixmaps(const SkYUVAInfo& yuvaInfo, + const SkPixmap pixmaps[kMaxPlanes]) { + SkColorType colorTypes[kMaxPlanes] = {}; + size_t rowBytes[kMaxPlanes] = {}; + int numPlanes = yuvaInfo.numPlanes(); + for (int i = 0; i < numPlanes; ++i) { + colorTypes[i] = pixmaps[i].colorType(); + rowBytes[i] = pixmaps[i].rowBytes(); + } + SkYUVAPixmapInfo yuvaPixmapInfo(yuvaInfo, colorTypes, rowBytes); + if (!yuvaPixmapInfo.isValid()) { + return {}; + } + return SkYUVAPixmaps(yuvaInfo, yuvaPixmapInfo.dataType(), pixmaps); +} + +SkYUVAPixmaps::SkYUVAPixmaps(const SkYUVAPixmapInfo& yuvaPixmapInfo, sk_sp data) + : fData(std::move(data)) + , fYUVAInfo(yuvaPixmapInfo.yuvaInfo()) + , fDataType(yuvaPixmapInfo.dataType()) { + SkASSERT(yuvaPixmapInfo.isValid()); + SkASSERT(yuvaPixmapInfo.computeTotalBytes() <= fData->size()); + SkAssertResult(yuvaPixmapInfo.initPixmapsFromSingleAllocation(fData->writable_data(), + fPlanes.data())); +} + +SkYUVAPixmaps::SkYUVAPixmaps(const SkYUVAInfo& yuvaInfo, + DataType dataType, + const SkPixmap pixmaps[kMaxPlanes]) + : fYUVAInfo(yuvaInfo), fDataType(dataType) { + std::copy_n(pixmaps, yuvaInfo.numPlanes(), fPlanes.data()); +} + +SkYUVAPixmapInfo SkYUVAPixmaps::pixmapsInfo() const { + if (!this->isValid()) { + return {}; + } + SkColorType colorTypes[kMaxPlanes] = {}; + size_t rowBytes[kMaxPlanes] = {}; + int numPlanes = this->numPlanes(); + for (int i = 0; i < numPlanes; ++i) { + colorTypes[i] = fPlanes[i].colorType(); + rowBytes[i] = fPlanes[i].rowBytes(); + } + return {fYUVAInfo, colorTypes, rowBytes}; +} + +SkYUVAInfo::YUVALocations SkYUVAPixmaps::toYUVALocations() const { + uint32_t channelFlags[] = {SkColorTypeChannelFlags(fPlanes[0].colorType()), + SkColorTypeChannelFlags(fPlanes[1].colorType()), + SkColorTypeChannelFlags(fPlanes[2].colorType()), + SkColorTypeChannelFlags(fPlanes[3].colorType())}; + auto result = fYUVAInfo.toYUVALocations(channelFlags); + SkDEBUGCODE(int numPlanes;) + SkASSERT(SkYUVAInfo::YUVALocation::AreValidLocations(result, &numPlanes)); + SkASSERT(numPlanes == this->numPlanes()); + return result; +} diff --git a/gfx/skia/skia/src/core/SkYUVMath.cpp b/gfx/skia/skia/src/core/SkYUVMath.cpp new file mode 100644 index 0000000000..2debe75925 --- /dev/null +++ b/gfx/skia/skia/src/core/SkYUVMath.cpp @@ -0,0 +1,339 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkM44.h" +#include "src/core/SkYUVMath.h" + +// in SkColorMatrix order (row-major) +// Created by running SkColorMatrix_DumpYUVMatrixTables() +const float JPEG_full_rgb_to_yuv[] = { + 0.299000f, 0.587000f, 0.114000f, 0.000000f, 0.000000f, + -0.168736f, -0.331264f, 0.500000f, 0.000000f, 0.501961f, + 0.500000f, -0.418688f, -0.081312f, 0.000000f, 0.501961f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float JPEG_full_yuv_to_rgb[] = { + 1.000000f, -0.000000f, 1.402000f, 0.000000f, -0.703749f, + 1.000000f, -0.344136f, -0.714136f, 0.000000f, 0.531211f, + 1.000000f, 1.772000f, 0.000000f, 0.000000f, -0.889475f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float Rec601_limited_rgb_to_yuv[] = { + 0.256788f, 0.504129f, 0.097906f, 0.000000f, 0.062745f, + -0.148223f, -0.290993f, 0.439216f, 0.000000f, 0.501961f, + 0.439216f, -0.367788f, -0.071427f, 0.000000f, 0.501961f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float Rec601_limited_yuv_to_rgb[] = { + 1.164384f, -0.000000f, 1.596027f, 0.000000f, -0.874202f, + 1.164384f, -0.391762f, -0.812968f, 0.000000f, 0.531668f, + 1.164384f, 2.017232f, 0.000000f, 0.000000f, -1.085631f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float Rec709_full_rgb_to_yuv[] = { + 0.212600f, 0.715200f, 0.072200f, 0.000000f, 0.000000f, + -0.114572f, -0.385428f, 0.500000f, 0.000000f, 0.501961f, + 0.500000f, -0.454153f, -0.045847f, 0.000000f, 0.501961f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float Rec709_full_yuv_to_rgb[] = { + 1.000000f, -0.000000f, 1.574800f, 0.000000f, -0.790488f, + 1.000000f, -0.187324f, -0.468124f, 0.000000f, 0.329010f, + 1.000000f, 1.855600f, -0.000000f, 0.000000f, -0.931439f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float Rec709_limited_rgb_to_yuv[] = { + 0.182586f, 0.614231f, 0.062007f, 0.000000f, 0.062745f, + -0.100644f, -0.338572f, 0.439216f, 0.000000f, 0.501961f, + 0.439216f, -0.398942f, -0.040274f, 0.000000f, 0.501961f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float Rec709_limited_yuv_to_rgb[] = { + 1.164384f, -0.000000f, 1.792741f, 0.000000f, -0.972945f, + 1.164384f, -0.213249f, -0.532909f, 0.000000f, 0.301483f, + 1.164384f, 2.112402f, -0.000000f, 0.000000f, -1.133402f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_8bit_full_rgb_to_yuv[] = { + 0.262700f, 0.678000f, 0.059300f, 0.000000f, 0.000000f, + -0.139630f, -0.360370f, 0.500000f, 0.000000f, 0.501961f, + 0.500000f, -0.459786f, -0.040214f, 0.000000f, 0.501961f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_8bit_full_yuv_to_rgb[] = { + 1.000000f, -0.000000f, 1.474600f, 0.000000f, -0.740191f, + 1.000000f, -0.164553f, -0.571353f, 0.000000f, 0.369396f, + 1.000000f, 1.881400f, -0.000000f, 0.000000f, -0.944389f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_8bit_limited_rgb_to_yuv[] = { + 0.225613f, 0.582282f, 0.050928f, 0.000000f, 0.062745f, + -0.122655f, -0.316560f, 0.439216f, 0.000000f, 0.501961f, + 0.439216f, -0.403890f, -0.035326f, 0.000000f, 0.501961f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_8bit_limited_yuv_to_rgb[] = { + 1.164384f, -0.000000f, 1.678674f, 0.000000f, -0.915688f, + 1.164384f, -0.187326f, -0.650424f, 0.000000f, 0.347458f, + 1.164384f, 2.141772f, -0.000000f, 0.000000f, -1.148145f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_10bit_full_rgb_to_yuv[] = { + 0.262700f, 0.678000f, 0.059300f, 0.000000f, 0.000000f, + -0.139630f, -0.360370f, 0.500000f, 0.000000f, 0.500489f, + 0.500000f, -0.459786f, -0.040214f, 0.000000f, 0.500489f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_10bit_full_yuv_to_rgb[] = { + 1.000000f, -0.000000f, 1.474600f, 0.000000f, -0.738021f, + 1.000000f, -0.164553f, -0.571353f, 0.000000f, 0.368313f, + 1.000000f, 1.881400f, -0.000000f, 0.000000f, -0.941620f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_10bit_limited_rgb_to_yuv[] = { + 0.224951f, 0.580575f, 0.050779f, 0.000000f, 0.062561f, + -0.122296f, -0.315632f, 0.437928f, 0.000000f, 0.500489f, + 0.437928f, -0.402706f, -0.035222f, 0.000000f, 0.500489f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_10bit_limited_yuv_to_rgb[] = { + 1.167808f, -0.000000f, 1.683611f, 0.000000f, -0.915688f, + 1.167808f, -0.187877f, -0.652337f, 0.000000f, 0.347458f, + 1.167808f, 2.148072f, -0.000000f, 0.000000f, -1.148145f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_12bit_full_rgb_to_yuv[] = { + 0.262700f, 0.678000f, 0.059300f, 0.000000f, 0.000000f, + -0.139630f, -0.360370f, 0.500000f, 0.000000f, 0.500122f, + 0.500000f, -0.459786f, -0.040214f, 0.000000f, 0.500122f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_12bit_full_yuv_to_rgb[] = { + 1.000000f, -0.000000f, 1.474600f, 0.000000f, -0.737480f, + 1.000000f, -0.164553f, -0.571353f, 0.000000f, 0.368043f, + 1.000000f, 1.881400f, -0.000000f, 0.000000f, -0.940930f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_12bit_limited_rgb_to_yuv[] = { + 0.224787f, 0.580149f, 0.050742f, 0.000000f, 0.062515f, + -0.122206f, -0.315401f, 0.437607f, 0.000000f, 0.500122f, + 0.437607f, -0.402411f, -0.035196f, 0.000000f, 0.500122f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; +const float BT2020_12bit_limited_yuv_to_rgb[] = { + 1.168664f, -0.000000f, 1.684846f, 0.000000f, -0.915688f, + 1.168664f, -0.188015f, -0.652816f, 0.000000f, 0.347458f, + 1.168664f, 2.149647f, -0.000000f, 0.000000f, -1.148145f, + 0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f, +}; + +static_assert(kJPEG_Full_SkYUVColorSpace == 0, ""); +static_assert(kRec601_Limited_SkYUVColorSpace == 1, ""); +static_assert(kRec709_Full_SkYUVColorSpace == 2, ""); +static_assert(kRec709_Limited_SkYUVColorSpace == 3, ""); +static_assert(kBT2020_8bit_Full_SkYUVColorSpace == 4, ""); +static_assert(kBT2020_8bit_Limited_SkYUVColorSpace == 5, ""); +static_assert(kBT2020_10bit_Full_SkYUVColorSpace == 6, ""); +static_assert(kBT2020_10bit_Limited_SkYUVColorSpace == 7, ""); +static_assert(kBT2020_12bit_Full_SkYUVColorSpace == 8, ""); +static_assert(kBT2020_12bit_Limited_SkYUVColorSpace == 9, ""); + +const float* yuv_to_rgb_array[] = { + JPEG_full_yuv_to_rgb, + Rec601_limited_yuv_to_rgb, + Rec709_full_yuv_to_rgb, + Rec709_limited_yuv_to_rgb, + BT2020_8bit_full_yuv_to_rgb, + BT2020_8bit_limited_yuv_to_rgb, + BT2020_10bit_full_yuv_to_rgb, + BT2020_10bit_limited_yuv_to_rgb, + BT2020_12bit_full_yuv_to_rgb, + BT2020_12bit_limited_yuv_to_rgb, +}; + +const float* rgb_to_yuv_array[] = { + JPEG_full_rgb_to_yuv, + Rec601_limited_rgb_to_yuv, + Rec709_full_rgb_to_yuv, + Rec709_limited_rgb_to_yuv, + BT2020_8bit_full_rgb_to_yuv, + BT2020_8bit_limited_rgb_to_yuv, + BT2020_10bit_full_rgb_to_yuv, + BT2020_10bit_limited_rgb_to_yuv, + BT2020_12bit_full_rgb_to_yuv, + BT2020_12bit_limited_rgb_to_yuv, +}; + +constexpr size_t kSizeOfColorMatrix = 20 * sizeof(float); + +void SkColorMatrix_RGB2YUV(SkYUVColorSpace cs, float m[20]) { + if ((unsigned)cs < (unsigned)kIdentity_SkYUVColorSpace) { + memcpy(m, rgb_to_yuv_array[(unsigned)cs], kSizeOfColorMatrix); + } else { + memset(m, 0, kSizeOfColorMatrix); + m[0] = m[6] = m[12] = m[18] = 1; + } +} + +void SkColorMatrix_YUV2RGB(SkYUVColorSpace cs, float m[20]) { + if ((unsigned)cs < (unsigned)kIdentity_SkYUVColorSpace) { + memcpy(m, yuv_to_rgb_array[(unsigned)cs], kSizeOfColorMatrix); + } else { + memset(m, 0, kSizeOfColorMatrix); + m[0] = m[6] = m[12] = m[18] = 1; + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +// we just drop the alpha rol/col from the colormatrix +// output is | tr | +// | 3x3 tg | +// | tb | +// | 0 0 0 1 | +static void colormatrix_to_matrix44(const float src[20], SkM44* dst) { + *dst = SkM44(src[ 0], src[ 1], src[ 2], src[ 4], + src[ 5], src[ 6], src[ 7], src[ 9], + src[10], src[11], src[12], src[14], + 0, 0, 0, 1); +} + +// input: ignore the bottom row +// output: inject identity row/column for alpha +static void matrix44_to_colormatrix(const SkM44& src, float dst[20]) { + dst[0] = src.rc(0,0); + dst[1] = src.rc(0,1); + dst[2] = src.rc(0,2); + dst[3] = 0; + dst[4] = src.rc(0,3); // tx + + dst[5] = src.rc(1,0); + dst[6] = src.rc(1,1); + dst[7] = src.rc(1,2); + dst[8] = 0; + dst[9] = src.rc(1,3); // ty + + dst[10] = src.rc(2,0); + dst[11] = src.rc(2,1); + dst[12] = src.rc(2,2); + dst[13] = 0; + dst[14] = src.rc(2,3); // tz + + dst[15] = dst[16] = dst[17] = dst[19] = 0; + dst[18] = 1; +} + +static void scale3(float m[], float s) { + for (int i = 0; i < 3; ++i) { + m[i] *= s; + } +} + +namespace { +enum Range { kFull, kLimited }; +struct YUVCoeff { + float Kr, Kb; + int bits; + Range range; +}; + +const YUVCoeff gCoeff[] = { + { 0.2990f, 0.1140f, 8, kFull }, // kJPEG_Full_SkYUVColorSpace + { 0.2990f, 0.1140f, 8, kLimited }, // kRec601_Limited_SkYUVColorSpace + { 0.2126f, 0.0722f, 8, kFull }, // kRec709_Full_SkYUVColorSpace + { 0.2126f, 0.0722f, 8, kLimited }, // kRec709_Limited_SkYUVColorSpace + { 0.2627f, 0.0593f, 8, kFull }, // kBT2020_8bit_Full_SkYUVColorSpace + { 0.2627f, 0.0593f, 8, kLimited }, // kBT2020_8bit_Limited_SkYUVColorSpace + { 0.2627f, 0.0593f, 10, kFull }, // kBT2020_10bit_Full_SkYUVColorSpace + { 0.2627f, 0.0593f, 10, kLimited }, // kBT2020_10bit_Limited_SkYUVColorSpace + { 0.2627f, 0.0593f, 12, kFull }, // kBT2020_12bit_Full_SkYUVColorSpace + { 0.2627f, 0.0593f, 12, kLimited }, // kBT2020_12bit_Limited_SkYUVColorSpace +}; +} // namespace + +static void make_rgb_to_yuv_matrix(float mx[20], const YUVCoeff& c) { + SkASSERT(c.bits >= 8); + const float Kr = c.Kr; + const float Kb = c.Kb; + const float Kg = 1.0f - Kr - Kb; + const float Cr = 0.5f / (1.0f - Kb); + const float Cb = 0.5f / (1.0f - Kr); + + const int shift = c.bits - 8; + + const float denom = static_cast((1 << c.bits) - 1); + float scaleY = 1.0f, + addY = 0.0f, + scaleUV = 1.0f, + addUV = (128 << shift) / denom; + + if (c.range == kLimited) { + scaleY = (219 << shift) / denom; + addY = ( 16 << shift) / denom; + scaleUV = (224 << shift) / denom; + } + + float m[20] = { + Kr, Kg, Kb, 0, addY, + -Kr, -Kg, 1-Kb, 0, addUV, + 1-Kr, -Kg, -Kb, 0, addUV, + 0, 0, 0, 1, 0, + }; + memcpy(mx, m, sizeof(m)); + scale3(mx + 0, scaleY ); + scale3(mx + 5, Cr * scaleUV); + scale3(mx + 10, Cb * scaleUV); +} + +static void dump(const float m[20], SkYUVColorSpace cs, bool rgb2yuv) { + const char* names[] = { + "JPEG_full", + "Rec601_limited", + "Rec709_full", + "Rec709_limited", + "BT2020_8bit_full", + "BT2020_8bit_limited", + "BT2020_10bit_full", + "BT2020_10bit_limited", + "BT2020_12bit_full", + "BT2020_12bit_limited", + }; + const char* dirnames[] = { + "yuv_to_rgb", "rgb_to_yuv", + }; + SkDebugf("const float %s_%s[] = {\n", names[cs], dirnames[rgb2yuv]); + for (int i = 0; i < 4; ++i) { + SkDebugf(" "); + for (int j = 0; j < 5; ++j) { + SkDebugf(" %9.6ff,", m[i * 5 + j]); + } + SkDebugf("\n"); + } + SkDebugf("};\n"); +} + +// Used to create the prebuilt tables for each colorspace. +// Don't remove this function, in case we want to recompute those tables in the future. +void SkColorMatrix_DumpYUVMatrixTables() { + for (int i = 0; i < kLastEnum_SkYUVColorSpace; ++i) { + SkYUVColorSpace cs = static_cast(i); + float m[20]; + make_rgb_to_yuv_matrix(m, gCoeff[(unsigned)cs]); + dump(m, cs, true); + SkM44 m44, im44; + colormatrix_to_matrix44(m, &m44); + float im[20]; +#ifdef SK_DEBUG + // be sure our coversion between matrix44 and colormatrix is perfect + matrix44_to_colormatrix(m44, im); + SkASSERT(memcmp(m, im, sizeof(im)) == 0); +#endif + SkAssertResult(m44.invert(&im44)); + matrix44_to_colormatrix(im44, im); + dump(im, cs, false); + } +} diff --git a/gfx/skia/skia/src/core/SkYUVMath.h b/gfx/skia/skia/src/core/SkYUVMath.h new file mode 100644 index 0000000000..9ecd2c8366 --- /dev/null +++ b/gfx/skia/skia/src/core/SkYUVMath.h @@ -0,0 +1,19 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkYUVMath_DEFINED +#define SkYUVMath_DEFINED + +#include "include/core/SkImageInfo.h" + +void SkColorMatrix_RGB2YUV(SkYUVColorSpace, float m[20]); +void SkColorMatrix_YUV2RGB(SkYUVColorSpace, float m[20]); + +// Used to create the pre-compiled tables in SkYUVMath.cpp +void SkColorMatrix_DumpYUVMatrixTables(); + +#endif diff --git a/gfx/skia/skia/src/core/SkYUVPlanesCache.cpp b/gfx/skia/skia/src/core/SkYUVPlanesCache.cpp new file mode 100644 index 0000000000..3f33fce699 --- /dev/null +++ b/gfx/skia/skia/src/core/SkYUVPlanesCache.cpp @@ -0,0 +1,93 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkYUVPlanesCache.h" + +#include "include/core/SkYUVAPixmaps.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkCachedData.h" +#include "src/core/SkResourceCache.h" + +#define CHECK_LOCAL(localCache, localName, globalName, ...) \ + ((localCache) ? localCache->localName(__VA_ARGS__) : SkResourceCache::globalName(__VA_ARGS__)) + +namespace { +static unsigned gYUVPlanesKeyNamespaceLabel; + +struct YUVValue { + SkYUVAPixmaps fPixmaps; + SkCachedData* fData; +}; + +struct YUVPlanesKey : public SkResourceCache::Key { + YUVPlanesKey(uint32_t genID) + : fGenID(genID) + { + this->init(&gYUVPlanesKeyNamespaceLabel, SkMakeResourceCacheSharedIDForBitmap(genID), + sizeof(genID)); + } + + uint32_t fGenID; +}; + +struct YUVPlanesRec : public SkResourceCache::Rec { + YUVPlanesRec(YUVPlanesKey key, SkCachedData* data, const SkYUVAPixmaps& pixmaps) + : fKey(key) + { + fValue.fData = data; + fValue.fPixmaps = pixmaps; + fValue.fData->attachToCacheAndRef(); + } + ~YUVPlanesRec() override { + fValue.fData->detachFromCacheAndUnref(); + } + + YUVPlanesKey fKey; + YUVValue fValue; + + const Key& getKey() const override { return fKey; } + size_t bytesUsed() const override { return sizeof(*this) + fValue.fData->size(); } + const char* getCategory() const override { return "yuv-planes"; } + SkDiscardableMemory* diagnostic_only_getDiscardable() const override { + return fValue.fData->diagnostic_only_getDiscardable(); + } + + static bool Visitor(const SkResourceCache::Rec& baseRec, void* contextData) { + const YUVPlanesRec& rec = static_cast(baseRec); + YUVValue* result = static_cast(contextData); + + SkCachedData* tmpData = rec.fValue.fData; + tmpData->ref(); + if (nullptr == tmpData->data()) { + tmpData->unref(); + return false; + } + result->fData = tmpData; + result->fPixmaps = rec.fValue.fPixmaps; + return true; + } +}; +} // namespace + +SkCachedData* SkYUVPlanesCache::FindAndRef(uint32_t genID, + SkYUVAPixmaps* pixmaps, + SkResourceCache* localCache) { + YUVValue result; + YUVPlanesKey key(genID); + if (!CHECK_LOCAL(localCache, find, Find, key, YUVPlanesRec::Visitor, &result)) { + return nullptr; + } + + *pixmaps = result.fPixmaps; + return result.fData; +} + +void SkYUVPlanesCache::Add(uint32_t genID, SkCachedData* data, const SkYUVAPixmaps& pixmaps, + SkResourceCache* localCache) { + YUVPlanesKey key(genID); + return CHECK_LOCAL(localCache, add, Add, new YUVPlanesRec(key, data, pixmaps)); +} diff --git a/gfx/skia/skia/src/core/SkYUVPlanesCache.h b/gfx/skia/skia/src/core/SkYUVPlanesCache.h new file mode 100644 index 0000000000..dfe535f679 --- /dev/null +++ b/gfx/skia/skia/src/core/SkYUVPlanesCache.h @@ -0,0 +1,38 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkYUVPlanesCache_DEFINED +#define SkYUVPlanesCache_DEFINED + +#include "include/core/SkTypes.h" + +class SkCachedData; +class SkResourceCache; +class SkYUVAPixmaps; + +class SkYUVPlanesCache { +public: + /** + * On success, return a ref to the SkCachedData that holds the pixel data. The SkYUVAPixmaps + * contains a description of the YUVA data and has a SkPixmap for each plane that points + * into the SkCachedData. + * + * On failure, return nullptr. + */ + static SkCachedData* FindAndRef(uint32_t genID, + SkYUVAPixmaps* pixmaps, + SkResourceCache* localCache = nullptr); + + /** + * Add a pixelRef ID and its YUV planes data to the cache. The SkYUVAPixmaps should contain + * SkPixmaps that store their pixel data in the SkCachedData. + */ + static void Add(uint32_t genID, SkCachedData* data, const SkYUVAPixmaps& pixmaps, + SkResourceCache* localCache = nullptr); +}; + +#endif diff --git a/gfx/skia/skia/src/effects/Sk1DPathEffect.cpp b/gfx/skia/skia/src/effects/Sk1DPathEffect.cpp new file mode 100644 index 0000000000..98da0d4c8e --- /dev/null +++ b/gfx/skia/skia/src/effects/Sk1DPathEffect.cpp @@ -0,0 +1,259 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/Sk1DPathEffect.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPathMeasure.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStrokeRec.h" +#include "include/core/SkTypes.h" +#include "src/core/SkPathEffectBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +struct SkRect; + +// Since we are stepping by a float, the do/while loop might go on forever (or nearly so). +// Put in a governor to limit crash values from looping too long (and allocating too much ram). +#define MAX_REASONABLE_ITERATIONS 100000 + +class Sk1DPathEffect : public SkPathEffectBase { +public: +protected: + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override { + SkPathMeasure meas(src, false); + do { + int governor = MAX_REASONABLE_ITERATIONS; + SkScalar length = meas.getLength(); + SkScalar distance = this->begin(length); + while (distance < length && --governor >= 0) { + SkScalar delta = this->next(dst, distance, meas); + if (delta <= 0) { + break; + } + distance += delta; + } + if (governor < 0) { + return false; + } + } while (meas.nextContour()); + return true; + } + + /** Called at the start of each contour, returns the initial offset + into that contour. + */ + virtual SkScalar begin(SkScalar contourLength) const = 0; + /** Called with the current distance along the path, with the current matrix + for the point/tangent at the specified distance. + Return the distance to travel for the next call. If return <= 0, then that + contour is done. + */ + virtual SkScalar next(SkPath* dst, SkScalar dist, SkPathMeasure&) const = 0; + +private: + // For simplicity, assume fast bounds cannot be computed + bool computeFastBounds(SkRect*) const override { return false; } +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkPath1DPathEffectImpl : public Sk1DPathEffect { +public: + SkPath1DPathEffectImpl(const SkPath& path, SkScalar advance, SkScalar phase, + SkPath1DPathEffect::Style style) : fPath(path) { + SkASSERT(advance > 0 && !path.isEmpty()); + + // Make the path thread-safe. + fPath.updateBoundsCache(); + (void)fPath.getGenerationID(); + + // cleanup their phase parameter, inverting it so that it becomes an + // offset along the path (to match the interpretation in PostScript) + if (phase < 0) { + phase = -phase; + if (phase > advance) { + phase = SkScalarMod(phase, advance); + } + } else { + if (phase > advance) { + phase = SkScalarMod(phase, advance); + } + phase = advance - phase; + } + // now catch the edge case where phase == advance (within epsilon) + if (phase >= advance) { + phase = 0; + } + SkASSERT(phase >= 0); + + fAdvance = advance; + fInitialOffset = phase; + fStyle = style; + } + + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* cullRect, const SkMatrix& ctm) const override { + rec->setFillStyle(); + return this->INHERITED::onFilterPath(dst, src, rec, cullRect, ctm); + } + + SkScalar begin(SkScalar contourLength) const override { + return fInitialOffset; + } + + SkScalar next(SkPath*, SkScalar, SkPathMeasure&) const override; + + static sk_sp CreateProc(SkReadBuffer& buffer) { + SkScalar advance = buffer.readScalar(); + SkPath path; + buffer.readPath(&path); + SkScalar phase = buffer.readScalar(); + SkPath1DPathEffect::Style style = buffer.read32LE(SkPath1DPathEffect::kLastEnum_Style); + return buffer.isValid() ? SkPath1DPathEffect::Make(path, advance, phase, style) : nullptr; + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeScalar(fAdvance); + buffer.writePath(fPath); + buffer.writeScalar(fInitialOffset); + buffer.writeUInt(fStyle); + } + + Factory getFactory() const override { return CreateProc; } + const char* getTypeName() const override { return "SkPath1DPathEffect"; } + +private: + SkPath fPath; // copied from constructor + SkScalar fAdvance; // copied from constructor + SkScalar fInitialOffset; // computed from phase + SkPath1DPathEffect::Style fStyle; // copied from constructor + + using INHERITED = Sk1DPathEffect; +}; + +static bool morphpoints(SkPoint dst[], const SkPoint src[], int count, + SkPathMeasure& meas, SkScalar dist) { + for (int i = 0; i < count; i++) { + SkPoint pos; + SkVector tangent; + + SkScalar sx = src[i].fX; + SkScalar sy = src[i].fY; + + if (!meas.getPosTan(dist + sx, &pos, &tangent)) { + return false; + } + + SkMatrix matrix; + SkPoint pt; + + pt.set(sx, sy); + matrix.setSinCos(tangent.fY, tangent.fX, 0, 0); + matrix.preTranslate(-sx, 0); + matrix.postTranslate(pos.fX, pos.fY); + matrix.mapPoints(&dst[i], &pt, 1); + } + return true; +} + +/* TODO + +Need differentially more subdivisions when the follow-path is curvy. Not sure how to +determine that, but we need it. I guess a cheap answer is let the caller tell us, +but that seems like a cop-out. Another answer is to get Rob Johnson to figure it out. +*/ +static void morphpath(SkPath* dst, const SkPath& src, SkPathMeasure& meas, + SkScalar dist) { + SkPath::Iter iter(src, false); + SkPoint srcP[4], dstP[3]; + SkPath::Verb verb; + + while ((verb = iter.next(srcP)) != SkPath::kDone_Verb) { + switch (verb) { + case SkPath::kMove_Verb: + if (morphpoints(dstP, srcP, 1, meas, dist)) { + dst->moveTo(dstP[0]); + } + break; + case SkPath::kLine_Verb: + srcP[2] = srcP[1]; + srcP[1].set(SkScalarAve(srcP[0].fX, srcP[2].fX), + SkScalarAve(srcP[0].fY, srcP[2].fY)); + [[fallthrough]]; + case SkPath::kQuad_Verb: + if (morphpoints(dstP, &srcP[1], 2, meas, dist)) { + dst->quadTo(dstP[0], dstP[1]); + } + break; + case SkPath::kConic_Verb: + if (morphpoints(dstP, &srcP[1], 2, meas, dist)) { + dst->conicTo(dstP[0], dstP[1], iter.conicWeight()); + } + break; + case SkPath::kCubic_Verb: + if (morphpoints(dstP, &srcP[1], 3, meas, dist)) { + dst->cubicTo(dstP[0], dstP[1], dstP[2]); + } + break; + case SkPath::kClose_Verb: + dst->close(); + break; + default: + SkDEBUGFAIL("unknown verb"); + break; + } + } +} + +SkScalar SkPath1DPathEffectImpl::next(SkPath* dst, SkScalar distance, + SkPathMeasure& meas) const { +#if defined(SK_BUILD_FOR_FUZZER) + if (dst->countPoints() > 100000) { + return fAdvance; + } +#endif + switch (fStyle) { + case SkPath1DPathEffect::kTranslate_Style: { + SkPoint pos; + if (meas.getPosTan(distance, &pos, nullptr)) { + dst->addPath(fPath, pos.fX, pos.fY); + } + } break; + case SkPath1DPathEffect::kRotate_Style: { + SkMatrix matrix; + if (meas.getMatrix(distance, &matrix)) { + dst->addPath(fPath, matrix); + } + } break; + case SkPath1DPathEffect::kMorph_Style: + morphpath(dst, fPath, meas, distance); + break; + } + return fAdvance; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkPath1DPathEffect::Make(const SkPath& path, SkScalar advance, SkScalar phase, + Style style) { + if (advance <= 0 || !SkScalarIsFinite(advance) || !SkScalarIsFinite(phase) || path.isEmpty()) { + return nullptr; + } + return sk_sp(new SkPath1DPathEffectImpl(path, advance, phase, style)); +} + +void SkPath1DPathEffect::RegisterFlattenables() { + SK_REGISTER_FLATTENABLE(SkPath1DPathEffectImpl); +} diff --git a/gfx/skia/skia/src/effects/Sk2DPathEffect.cpp b/gfx/skia/skia/src/effects/Sk2DPathEffect.cpp new file mode 100644 index 0000000000..5cb41549d3 --- /dev/null +++ b/gfx/skia/skia/src/effects/Sk2DPathEffect.cpp @@ -0,0 +1,223 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/Sk2DPathEffect.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkRegion.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStrokeRec.h" +#include "include/core/SkTypes.h" +#include "src/core/SkPathEffectBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +class Sk2DPathEffect : public SkPathEffectBase { +public: + Sk2DPathEffect(const SkMatrix& mat) : fMatrix(mat) { + // Calling invert will set the type mask on both matrices, making them thread safe. + fMatrixIsInvertible = fMatrix.invert(&fInverse); + } + +protected: + /** New virtual, to be overridden by subclasses. + This is called once from filterPath, and provides the + uv parameter bounds for the path. Subsequent calls to + next() will receive u and v values within these bounds, + and then a call to end() will signal the end of processing. + */ + virtual void begin(const SkIRect& uvBounds, SkPath* dst) const {} + virtual void next(const SkPoint& loc, int u, int v, SkPath* dst) const {} + virtual void end(SkPath* dst) const {} + + /** Low-level virtual called per span of locations in the u-direction. + The default implementation calls next() repeatedly with each + location. + */ + virtual void nextSpan(int x, int y, int ucount, SkPath* path) const { + if (!fMatrixIsInvertible) { + return; + } + #if defined(SK_BUILD_FOR_FUZZER) + if (ucount > 100) { + return; + } + #endif + + const SkMatrix& mat = this->getMatrix(); + SkPoint src, dst; + + src.set(SkIntToScalar(x) + SK_ScalarHalf, SkIntToScalar(y) + SK_ScalarHalf); + do { + mat.mapPoints(&dst, &src, 1); + this->next(dst, x++, y, path); + src.fX += SK_Scalar1; + } while (--ucount > 0); + } + + const SkMatrix& getMatrix() const { return fMatrix; } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeMatrix(fMatrix); + } + + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* cullRect, const SkMatrix&) const override { + if (!fMatrixIsInvertible) { + return false; + } + + SkPath tmp; + SkIRect ir; + + src.transform(fInverse, &tmp); + tmp.getBounds().round(&ir); + if (!ir.isEmpty()) { + this->begin(ir, dst); + + SkRegion rgn; + rgn.setPath(tmp, SkRegion(ir)); + SkRegion::Iterator iter(rgn); + for (; !iter.done(); iter.next()) { + const SkIRect& rect = iter.rect(); +#if defined(SK_BUILD_FOR_FUZZER) + if (rect.height() > 100) { + continue; + } +#endif + for (int y = rect.fTop; y < rect.fBottom; ++y) { + this->nextSpan(rect.fLeft, y, rect.width(), dst); + } + } + + this->end(dst); + } + return true; + } + +private: + SkMatrix fMatrix, fInverse; + bool fMatrixIsInvertible; + + // For simplicity, assume fast bounds cannot be computed + bool computeFastBounds(SkRect*) const override { return false; } + + friend class Sk2DPathEffectBlitter; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkLine2DPathEffectImpl : public Sk2DPathEffect { +public: + SkLine2DPathEffectImpl(SkScalar width, const SkMatrix& matrix) + : Sk2DPathEffect(matrix) + , fWidth(width) + { + SkASSERT(width >= 0); + } + + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* cullRect, const SkMatrix& ctm) const override { + if (this->INHERITED::onFilterPath(dst, src, rec, cullRect, ctm)) { + rec->setStrokeStyle(fWidth); + return true; + } + return false; + } + + void nextSpan(int u, int v, int ucount, SkPath* dst) const override { + if (ucount > 1) { + SkPoint src[2], dstP[2]; + + src[0].set(SkIntToScalar(u) + SK_ScalarHalf, SkIntToScalar(v) + SK_ScalarHalf); + src[1].set(SkIntToScalar(u+ucount) + SK_ScalarHalf, SkIntToScalar(v) + SK_ScalarHalf); + this->getMatrix().mapPoints(dstP, src, 2); + + dst->moveTo(dstP[0]); + dst->lineTo(dstP[1]); + } + } + + static sk_sp CreateProc(SkReadBuffer& buffer) { + SkMatrix matrix; + buffer.readMatrix(&matrix); + SkScalar width = buffer.readScalar(); + return SkLine2DPathEffect::Make(width, matrix); + } + + void flatten(SkWriteBuffer &buffer) const override { + buffer.writeMatrix(this->getMatrix()); + buffer.writeScalar(fWidth); + } + + Factory getFactory() const override { return CreateProc; } + const char* getTypeName() const override { return "SkLine2DPathEffect"; } + +private: + SkScalar fWidth; + + using INHERITED = Sk2DPathEffect; +}; + +///////////////////////////////////////////////////////////////////////////////////////////////// + +class SK_API SkPath2DPathEffectImpl : public Sk2DPathEffect { +public: + SkPath2DPathEffectImpl(const SkMatrix& m, const SkPath& p) : INHERITED(m), fPath(p) {} + + void next(const SkPoint& loc, int u, int v, SkPath* dst) const override { + dst->addPath(fPath, loc.fX, loc.fY); + } + + static sk_sp CreateProc(SkReadBuffer& buffer) { + SkMatrix matrix; + buffer.readMatrix(&matrix); + SkPath path; + buffer.readPath(&path); + return SkPath2DPathEffect::Make(matrix, path); + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeMatrix(this->getMatrix()); + buffer.writePath(fPath); + } + + Factory getFactory() const override { return CreateProc; } + const char* getTypeName() const override { return "SkPath2DPathEffect"; } + +private: + SkPath fPath; + + using INHERITED = Sk2DPathEffect; +}; + +////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkLine2DPathEffect::Make(SkScalar width, const SkMatrix& matrix) { + if (!(width >= 0)) { + return nullptr; + } + return sk_sp(new SkLine2DPathEffectImpl(width, matrix)); +} + +sk_sp SkPath2DPathEffect::Make(const SkMatrix& matrix, const SkPath& path) { + return sk_sp(new SkPath2DPathEffectImpl(matrix, path)); +} + +void SkLine2DPathEffect::RegisterFlattenables() { + SK_REGISTER_FLATTENABLE(SkLine2DPathEffectImpl); +} + +void SkPath2DPathEffect::RegisterFlattenables() { + SK_REGISTER_FLATTENABLE(SkPath2DPathEffectImpl); +} diff --git a/gfx/skia/skia/src/effects/SkBlenders.cpp b/gfx/skia/skia/src/effects/SkBlenders.cpp new file mode 100644 index 0000000000..ebd43d05b8 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkBlenders.cpp @@ -0,0 +1,78 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBlender.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkBlenders.h" + +#ifdef SK_ENABLE_SKSL +#include "include/core/SkBlendMode.h" +#include "include/core/SkData.h" +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/effects/SkRuntimeEffect.h" + +sk_sp SkBlenders::Arithmetic(float k1, float k2, float k3, float k4, + bool enforcePremul) { + if (!SkScalarIsFinite(k1) || + !SkScalarIsFinite(k2) || + !SkScalarIsFinite(k3) || + !SkScalarIsFinite(k4)) { + return nullptr; + } + + // Are we nearly a SkBlendMode? + const struct { + float k1, k2, k3, k4; + SkBlendMode mode; + } table[] = { + { 0, 1, 0, 0, SkBlendMode::kSrc }, + { 0, 0, 1, 0, SkBlendMode::kDst }, + { 0, 0, 0, 0, SkBlendMode::kClear }, + }; + for (const auto& t : table) { + if (SkScalarNearlyEqual(k1, t.k1) && + SkScalarNearlyEqual(k2, t.k2) && + SkScalarNearlyEqual(k3, t.k3) && + SkScalarNearlyEqual(k4, t.k4)) { + return SkBlender::Mode(t.mode); + } + } + + // If we get here, we need the actual blender effect. + + static SkRuntimeEffect* gArithmeticEffect = []{ + const char prog[] = + "uniform half4 k;" + "uniform half pmClamp;" + + "half4 main(half4 src, half4 dst) {" + "half4 c = k.x * src * dst + k.y * src + k.z * dst + k.w;" + "c.rgb = min(c.rgb, max(c.a, pmClamp));" + // rely on skia to saturate our alpha + "return c;" + "}" + ; + auto result = SkRuntimeEffect::MakeForBlender(SkString(prog)); + SkASSERTF(result.effect, "SkBlenders::Arithmetic: %s", result.errorText.c_str()); + return result.effect.release(); + }(); + + const float array[] = { + k1, k2, k3, k4, + enforcePremul ? 0.0f : 1.0f, + }; + return gArithmeticEffect->makeBlender(SkData::MakeWithCopy(array, sizeof(array))); +} +#else // SK_ENABLE_SKSL +sk_sp SkBlenders::Arithmetic(float k1, float k2, float k3, float k4, + bool enforcePremul) { + // TODO(skia:12197) + return nullptr; +} +#endif diff --git a/gfx/skia/skia/src/effects/SkColorMatrix.cpp b/gfx/skia/skia/src/effects/SkColorMatrix.cpp new file mode 100644 index 0000000000..e9ed2a509a --- /dev/null +++ b/gfx/skia/skia/src/effects/SkColorMatrix.cpp @@ -0,0 +1,116 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkColorMatrix.h" +#include "src/core/SkYUVMath.h" + +enum SkYUVColorSpace : int; + +SkColorMatrix SkColorMatrix::RGBtoYUV(SkYUVColorSpace cs) { + SkColorMatrix m; + SkColorMatrix_RGB2YUV(cs, m.fMat.data()); + return m; +} + +SkColorMatrix SkColorMatrix::YUVtoRGB(SkYUVColorSpace cs) { + SkColorMatrix m; + SkColorMatrix_YUV2RGB(cs, m.fMat.data()); + return m; +} + +enum { + kR_Scale = 0, + kG_Scale = 6, + kB_Scale = 12, + kA_Scale = 18, + + kR_Trans = 4, + kG_Trans = 9, + kB_Trans = 14, + kA_Trans = 19, +}; + +static void set_concat(float result[20], const float outer[20], const float inner[20]) { + float tmp[20]; + float* target; + + if (outer == result || inner == result) { + target = tmp; // will memcpy answer when we're done into result + } else { + target = result; + } + + int index = 0; + for (int j = 0; j < 20; j += 5) { + for (int i = 0; i < 4; i++) { + target[index++] = outer[j + 0] * inner[i + 0] + + outer[j + 1] * inner[i + 5] + + outer[j + 2] * inner[i + 10] + + outer[j + 3] * inner[i + 15]; + } + target[index++] = outer[j + 0] * inner[4] + + outer[j + 1] * inner[9] + + outer[j + 2] * inner[14] + + outer[j + 3] * inner[19] + + outer[j + 4]; + } + + if (target != result) { + std::copy_n(target, 20, result); + } +} + +void SkColorMatrix::setIdentity() { + fMat.fill(0.0f); + fMat[kR_Scale] = fMat[kG_Scale] = fMat[kB_Scale] = fMat[kA_Scale] = 1; +} + +void SkColorMatrix::setScale(float rScale, float gScale, float bScale, float aScale) { + fMat.fill(0.0f); + fMat[kR_Scale] = rScale; + fMat[kG_Scale] = gScale; + fMat[kB_Scale] = bScale; + fMat[kA_Scale] = aScale; +} + +void SkColorMatrix::postTranslate(float dr, float dg, float db, float da) { + fMat[kR_Trans] += dr; + fMat[kG_Trans] += dg; + fMat[kB_Trans] += db; + fMat[kA_Trans] += da; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkColorMatrix::setConcat(const SkColorMatrix& matA, const SkColorMatrix& matB) { + set_concat(fMat.data(), matA.fMat.data(), matB.fMat.data()); +} + +/////////////////////////////////////////////////////////////////////////////// + +static void setrow(float row[], float r, float g, float b) { + row[0] = r; + row[1] = g; + row[2] = b; +} + +static const float kHueR = 0.213f; +static const float kHueG = 0.715f; +static const float kHueB = 0.072f; + +void SkColorMatrix::setSaturation(float sat) { + fMat.fill(0.0f); + + const float R = kHueR * (1 - sat); + const float G = kHueG * (1 - sat); + const float B = kHueB * (1 - sat); + + setrow(fMat.data() + 0, R + sat, G, B); + setrow(fMat.data() + 5, R, G + sat, B); + setrow(fMat.data() + 10, R, G, B + sat); + fMat[kA_Scale] = 1; +} diff --git a/gfx/skia/skia/src/effects/SkColorMatrixFilter.cpp b/gfx/skia/skia/src/effects/SkColorMatrixFilter.cpp new file mode 100644 index 0000000000..ea2f47c4a5 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkColorMatrixFilter.cpp @@ -0,0 +1,43 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkColorMatrix.h" +#include "include/private/base/SkCPUTypes.h" + +static SkScalar byte_to_unit_float(U8CPU byte) { + if (0xFF == byte) { + // want to get this exact + return 1; + } else { + return byte * 0.00392156862745f; + } +} + +sk_sp SkColorFilters::Lighting(SkColor mul, SkColor add) { + const SkColor opaqueAlphaMask = SK_ColorBLACK; + // omit the alpha and compare only the RGB values + if (0 == (add & ~opaqueAlphaMask)) { + return SkColorFilters::Blend(mul | opaqueAlphaMask, SkBlendMode::kModulate); + } + + SkColorMatrix matrix; + matrix.setScale(byte_to_unit_float(SkColorGetR(mul)), + byte_to_unit_float(SkColorGetG(mul)), + byte_to_unit_float(SkColorGetB(mul)), + 1); + matrix.postTranslate(byte_to_unit_float(SkColorGetR(add)), + byte_to_unit_float(SkColorGetG(add)), + byte_to_unit_float(SkColorGetB(add)), + 0); + return SkColorFilters::Matrix(matrix); +} diff --git a/gfx/skia/skia/src/effects/SkCornerPathEffect.cpp b/gfx/skia/skia/src/effects/SkCornerPathEffect.cpp new file mode 100644 index 0000000000..e19c6c6f74 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkCornerPathEffect.cpp @@ -0,0 +1,187 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkCornerPathEffect.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "src/core/SkPathEffectBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +class SkMatrix; +class SkStrokeRec; +struct SkRect; + +static bool ComputeStep(const SkPoint& a, const SkPoint& b, SkScalar radius, + SkPoint* step) { + SkScalar dist = SkPoint::Distance(a, b); + + *step = b - a; + if (dist <= radius * 2) { + *step *= SK_ScalarHalf; + return false; + } else { + *step *= radius / dist; + return true; + } +} + +class SkCornerPathEffectImpl : public SkPathEffectBase { +public: + explicit SkCornerPathEffectImpl(SkScalar radius) : fRadius(radius) { + SkASSERT(radius > 0); + } + + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override { + if (fRadius <= 0) { + return false; + } + + SkPath::Iter iter(src, false); + SkPath::Verb verb, prevVerb = SkPath::kDone_Verb; + SkPoint pts[4]; + + bool closed; + SkPoint moveTo, lastCorner; + SkVector firstStep, step; + bool prevIsValid = true; + + // to avoid warnings + step.set(0, 0); + moveTo.set(0, 0); + firstStep.set(0, 0); + lastCorner.set(0, 0); + + for (;;) { + switch (verb = iter.next(pts)) { + case SkPath::kMove_Verb: + // close out the previous (open) contour + if (SkPath::kLine_Verb == prevVerb) { + dst->lineTo(lastCorner); + } + closed = iter.isClosedContour(); + if (closed) { + moveTo = pts[0]; + prevIsValid = false; + } else { + dst->moveTo(pts[0]); + prevIsValid = true; + } + break; + case SkPath::kLine_Verb: { + bool drawSegment = ComputeStep(pts[0], pts[1], fRadius, &step); + // prev corner + if (!prevIsValid) { + dst->moveTo(moveTo + step); + prevIsValid = true; + } else { + dst->quadTo(pts[0].fX, pts[0].fY, pts[0].fX + step.fX, + pts[0].fY + step.fY); + } + if (drawSegment) { + dst->lineTo(pts[1].fX - step.fX, pts[1].fY - step.fY); + } + lastCorner = pts[1]; + prevIsValid = true; + break; + } + case SkPath::kQuad_Verb: + // TBD - just replicate the curve for now + if (!prevIsValid) { + dst->moveTo(pts[0]); + prevIsValid = true; + } + dst->quadTo(pts[1], pts[2]); + lastCorner = pts[2]; + firstStep.set(0, 0); + break; + case SkPath::kConic_Verb: + // TBD - just replicate the curve for now + if (!prevIsValid) { + dst->moveTo(pts[0]); + prevIsValid = true; + } + dst->conicTo(pts[1], pts[2], iter.conicWeight()); + lastCorner = pts[2]; + firstStep.set(0, 0); + break; + case SkPath::kCubic_Verb: + if (!prevIsValid) { + dst->moveTo(pts[0]); + prevIsValid = true; + } + // TBD - just replicate the curve for now + dst->cubicTo(pts[1], pts[2], pts[3]); + lastCorner = pts[3]; + firstStep.set(0, 0); + break; + case SkPath::kClose_Verb: + if (firstStep.fX || firstStep.fY) { + dst->quadTo(lastCorner.fX, lastCorner.fY, + lastCorner.fX + firstStep.fX, + lastCorner.fY + firstStep.fY); + } + dst->close(); + prevIsValid = false; + break; + case SkPath::kDone_Verb: + if (prevIsValid) { + dst->lineTo(lastCorner); + } + return true; + default: + SkDEBUGFAIL("default should not be reached"); + return false; + } + + if (SkPath::kMove_Verb == prevVerb) { + firstStep = step; + } + prevVerb = verb; + } + } + + bool computeFastBounds(SkRect*) const override { + // Rounding sharp corners within a path produces a new path that is still contained within + // the original's bounds, so leave 'bounds' unmodified. + return true; + } + + static sk_sp CreateProc(SkReadBuffer& buffer) { + return SkCornerPathEffect::Make(buffer.readScalar()); + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeScalar(fRadius); + } + + Factory getFactory() const override { return CreateProc; } + const char* getTypeName() const override { return "SkCornerPathEffect"; } + +private: + const SkScalar fRadius; + + using INHERITED = SkPathEffectBase; +}; + +////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkCornerPathEffect::Make(SkScalar radius) { + return SkScalarIsFinite(radius) && (radius > 0) ? + sk_sp(new SkCornerPathEffectImpl(radius)) : nullptr; +} + +void SkCornerPathEffect::RegisterFlattenables() { + SkFlattenable::Register("SkCornerPathEffect", SkCornerPathEffectImpl::CreateProc); +} diff --git a/gfx/skia/skia/src/effects/SkDashImpl.h b/gfx/skia/skia/src/effects/SkDashImpl.h new file mode 100644 index 0000000000..8439ca0f19 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkDashImpl.h @@ -0,0 +1,49 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDashImpl_DEFINED +#define SkDashImpl_DEFINED + +#include "src/core/SkPathEffectBase.h" + +class SkDashImpl : public SkPathEffectBase { +public: + SkDashImpl(const SkScalar intervals[], int count, SkScalar phase); + +protected: + ~SkDashImpl() override; + void flatten(SkWriteBuffer&) const override; + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override; + + bool onAsPoints(PointData* results, const SkPath& src, const SkStrokeRec&, const SkMatrix&, + const SkRect*) const override; + + DashType onAsADash(DashInfo* info) const override; + +private: + SK_FLATTENABLE_HOOKS(SkDashImpl) + + bool computeFastBounds(SkRect* bounds) const override { + // Dashing a path returns a subset of the input path so just return true and leave + // bounds unmodified + return true; + } + + SkScalar* fIntervals; + int32_t fCount; + SkScalar fPhase; + // computed from phase + + SkScalar fInitialDashLength; + int32_t fInitialDashIndex; + SkScalar fIntervalLength; + + using INHERITED = SkPathEffectBase; +}; + +#endif diff --git a/gfx/skia/skia/src/effects/SkDashPathEffect.cpp b/gfx/skia/skia/src/effects/SkDashPathEffect.cpp new file mode 100644 index 0000000000..49ed5fea1c --- /dev/null +++ b/gfx/skia/skia/src/effects/SkDashPathEffect.cpp @@ -0,0 +1,413 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkDashPathEffect.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkStrokeRec.h" +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/effects/SkDashImpl.h" +#include "src/utils/SkDashPathPriv.h" + +#include +#include +#include + +using namespace skia_private; + +SkDashImpl::SkDashImpl(const SkScalar intervals[], int count, SkScalar phase) + : fPhase(0) + , fInitialDashLength(-1) + , fInitialDashIndex(0) + , fIntervalLength(0) { + SkASSERT(intervals); + SkASSERT(count > 1 && SkIsAlign2(count)); + + fIntervals = (SkScalar*)sk_malloc_throw(sizeof(SkScalar) * count); + fCount = count; + for (int i = 0; i < count; i++) { + fIntervals[i] = intervals[i]; + } + + // set the internal data members + SkDashPath::CalcDashParameters(phase, fIntervals, fCount, + &fInitialDashLength, &fInitialDashIndex, &fIntervalLength, &fPhase); +} + +SkDashImpl::~SkDashImpl() { + sk_free(fIntervals); +} + +bool SkDashImpl::onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* cullRect, const SkMatrix&) const { + return SkDashPath::InternalFilter(dst, src, rec, cullRect, fIntervals, fCount, + fInitialDashLength, fInitialDashIndex, fIntervalLength, + fPhase); +} + +static void outset_for_stroke(SkRect* rect, const SkStrokeRec& rec) { + SkScalar radius = SkScalarHalf(rec.getWidth()); + if (0 == radius) { + radius = SK_Scalar1; // hairlines + } + if (SkPaint::kMiter_Join == rec.getJoin()) { + radius *= rec.getMiter(); + } + rect->outset(radius, radius); +} + +// Attempt to trim the line to minimally cover the cull rect (currently +// only works for horizontal and vertical lines). +// Return true if processing should continue; false otherwise. +static bool cull_line(SkPoint* pts, const SkStrokeRec& rec, + const SkMatrix& ctm, const SkRect* cullRect, + const SkScalar intervalLength) { + if (nullptr == cullRect) { + SkASSERT(false); // Shouldn't ever occur in practice + return false; + } + + SkScalar dx = pts[1].x() - pts[0].x(); + SkScalar dy = pts[1].y() - pts[0].y(); + + if ((dx && dy) || (!dx && !dy)) { + return false; + } + + SkRect bounds = *cullRect; + outset_for_stroke(&bounds, rec); + + // cullRect is in device space while pts are in the local coordinate system + // defined by the ctm. We want our answer in the local coordinate system. + + SkASSERT(ctm.rectStaysRect()); + SkMatrix inv; + if (!ctm.invert(&inv)) { + return false; + } + + inv.mapRect(&bounds); + + if (dx) { + SkASSERT(dx && !dy); + SkScalar minX = pts[0].fX; + SkScalar maxX = pts[1].fX; + + if (dx < 0) { + using std::swap; + swap(minX, maxX); + } + + SkASSERT(minX < maxX); + if (maxX <= bounds.fLeft || minX >= bounds.fRight) { + return false; + } + + // Now we actually perform the chop, removing the excess to the left and + // right of the bounds (keeping our new line "in phase" with the dash, + // hence the (mod intervalLength). + + if (minX < bounds.fLeft) { + minX = bounds.fLeft - SkScalarMod(bounds.fLeft - minX, intervalLength); + } + if (maxX > bounds.fRight) { + maxX = bounds.fRight + SkScalarMod(maxX - bounds.fRight, intervalLength); + } + + SkASSERT(maxX > minX); + if (dx < 0) { + using std::swap; + swap(minX, maxX); + } + pts[0].fX = minX; + pts[1].fX = maxX; + } else { + SkASSERT(dy && !dx); + SkScalar minY = pts[0].fY; + SkScalar maxY = pts[1].fY; + + if (dy < 0) { + using std::swap; + swap(minY, maxY); + } + + SkASSERT(minY < maxY); + if (maxY <= bounds.fTop || minY >= bounds.fBottom) { + return false; + } + + // Now we actually perform the chop, removing the excess to the top and + // bottom of the bounds (keeping our new line "in phase" with the dash, + // hence the (mod intervalLength). + + if (minY < bounds.fTop) { + minY = bounds.fTop - SkScalarMod(bounds.fTop - minY, intervalLength); + } + if (maxY > bounds.fBottom) { + maxY = bounds.fBottom + SkScalarMod(maxY - bounds.fBottom, intervalLength); + } + + SkASSERT(maxY > minY); + if (dy < 0) { + using std::swap; + swap(minY, maxY); + } + pts[0].fY = minY; + pts[1].fY = maxY; + } + + return true; +} + +// Currently asPoints is more restrictive then it needs to be. In the future +// we need to: +// allow kRound_Cap capping (could allow rotations in the matrix with this) +// allow paths to be returned +bool SkDashImpl::onAsPoints(PointData* results, const SkPath& src, const SkStrokeRec& rec, + const SkMatrix& matrix, const SkRect* cullRect) const { + // width < 0 -> fill && width == 0 -> hairline so requiring width > 0 rules both out + if (0 >= rec.getWidth()) { + return false; + } + + // TODO: this next test could be eased up. We could allow any number of + // intervals as long as all the ons match and all the offs match. + // Additionally, they do not necessarily need to be integers. + // We cannot allow arbitrary intervals since we want the returned points + // to be uniformly sized. + if (fCount != 2 || + !SkScalarNearlyEqual(fIntervals[0], fIntervals[1]) || + !SkScalarIsInt(fIntervals[0]) || + !SkScalarIsInt(fIntervals[1])) { + return false; + } + + SkPoint pts[2]; + + if (!src.isLine(pts)) { + return false; + } + + // TODO: this test could be eased up to allow circles + if (SkPaint::kButt_Cap != rec.getCap()) { + return false; + } + + // TODO: this test could be eased up for circles. Rotations could be allowed. + if (!matrix.rectStaysRect()) { + return false; + } + + // See if the line can be limited to something plausible. + if (!cull_line(pts, rec, matrix, cullRect, fIntervalLength)) { + return false; + } + + SkScalar length = SkPoint::Distance(pts[1], pts[0]); + + SkVector tangent = pts[1] - pts[0]; + if (tangent.isZero()) { + return false; + } + + tangent.scale(SkScalarInvert(length)); + + // TODO: make this test for horizontal & vertical lines more robust + bool isXAxis = true; + if (SkScalarNearlyEqual(SK_Scalar1, tangent.fX) || + SkScalarNearlyEqual(-SK_Scalar1, tangent.fX)) { + results->fSize.set(SkScalarHalf(fIntervals[0]), SkScalarHalf(rec.getWidth())); + } else if (SkScalarNearlyEqual(SK_Scalar1, tangent.fY) || + SkScalarNearlyEqual(-SK_Scalar1, tangent.fY)) { + results->fSize.set(SkScalarHalf(rec.getWidth()), SkScalarHalf(fIntervals[0])); + isXAxis = false; + } else if (SkPaint::kRound_Cap != rec.getCap()) { + // Angled lines don't have axis-aligned boxes. + return false; + } + + if (results) { + results->fFlags = 0; + SkScalar clampedInitialDashLength = std::min(length, fInitialDashLength); + + if (SkPaint::kRound_Cap == rec.getCap()) { + results->fFlags |= PointData::kCircles_PointFlag; + } + + results->fNumPoints = 0; + SkScalar len2 = length; + if (clampedInitialDashLength > 0 || 0 == fInitialDashIndex) { + SkASSERT(len2 >= clampedInitialDashLength); + if (0 == fInitialDashIndex) { + if (clampedInitialDashLength > 0) { + if (clampedInitialDashLength >= fIntervals[0]) { + ++results->fNumPoints; // partial first dash + } + len2 -= clampedInitialDashLength; + } + len2 -= fIntervals[1]; // also skip first space + if (len2 < 0) { + len2 = 0; + } + } else { + len2 -= clampedInitialDashLength; // skip initial partial empty + } + } + // Too many midpoints can cause results->fNumPoints to overflow or + // otherwise cause the results->fPoints allocation below to OOM. + // Cap it to a sane value. + SkScalar numIntervals = len2 / fIntervalLength; + if (!SkScalarIsFinite(numIntervals) || numIntervals > SkDashPath::kMaxDashCount) { + return false; + } + int numMidPoints = SkScalarFloorToInt(numIntervals); + results->fNumPoints += numMidPoints; + len2 -= numMidPoints * fIntervalLength; + bool partialLast = false; + if (len2 > 0) { + if (len2 < fIntervals[0]) { + partialLast = true; + } else { + ++numMidPoints; + ++results->fNumPoints; + } + } + + results->fPoints = new SkPoint[results->fNumPoints]; + + SkScalar distance = 0; + int curPt = 0; + + if (clampedInitialDashLength > 0 || 0 == fInitialDashIndex) { + SkASSERT(clampedInitialDashLength <= length); + + if (0 == fInitialDashIndex) { + if (clampedInitialDashLength > 0) { + // partial first block + SkASSERT(SkPaint::kRound_Cap != rec.getCap()); // can't handle partial circles + SkScalar x = pts[0].fX + tangent.fX * SkScalarHalf(clampedInitialDashLength); + SkScalar y = pts[0].fY + tangent.fY * SkScalarHalf(clampedInitialDashLength); + SkScalar halfWidth, halfHeight; + if (isXAxis) { + halfWidth = SkScalarHalf(clampedInitialDashLength); + halfHeight = SkScalarHalf(rec.getWidth()); + } else { + halfWidth = SkScalarHalf(rec.getWidth()); + halfHeight = SkScalarHalf(clampedInitialDashLength); + } + if (clampedInitialDashLength < fIntervals[0]) { + // This one will not be like the others + results->fFirst.addRect(x - halfWidth, y - halfHeight, + x + halfWidth, y + halfHeight); + } else { + SkASSERT(curPt < results->fNumPoints); + results->fPoints[curPt].set(x, y); + ++curPt; + } + + distance += clampedInitialDashLength; + } + + distance += fIntervals[1]; // skip over the next blank block too + } else { + distance += clampedInitialDashLength; + } + } + + if (0 != numMidPoints) { + distance += SkScalarHalf(fIntervals[0]); + + for (int i = 0; i < numMidPoints; ++i) { + SkScalar x = pts[0].fX + tangent.fX * distance; + SkScalar y = pts[0].fY + tangent.fY * distance; + + SkASSERT(curPt < results->fNumPoints); + results->fPoints[curPt].set(x, y); + ++curPt; + + distance += fIntervalLength; + } + + distance -= SkScalarHalf(fIntervals[0]); + } + + if (partialLast) { + // partial final block + SkASSERT(SkPaint::kRound_Cap != rec.getCap()); // can't handle partial circles + SkScalar temp = length - distance; + SkASSERT(temp < fIntervals[0]); + SkScalar x = pts[0].fX + tangent.fX * (distance + SkScalarHalf(temp)); + SkScalar y = pts[0].fY + tangent.fY * (distance + SkScalarHalf(temp)); + SkScalar halfWidth, halfHeight; + if (isXAxis) { + halfWidth = SkScalarHalf(temp); + halfHeight = SkScalarHalf(rec.getWidth()); + } else { + halfWidth = SkScalarHalf(rec.getWidth()); + halfHeight = SkScalarHalf(temp); + } + results->fLast.addRect(x - halfWidth, y - halfHeight, + x + halfWidth, y + halfHeight); + } + + SkASSERT(curPt == results->fNumPoints); + } + + return true; +} + +SkPathEffect::DashType SkDashImpl::onAsADash(DashInfo* info) const { + if (info) { + if (info->fCount >= fCount && info->fIntervals) { + memcpy(info->fIntervals, fIntervals, fCount * sizeof(SkScalar)); + } + info->fCount = fCount; + info->fPhase = fPhase; + } + return kDash_DashType; +} + +void SkDashImpl::flatten(SkWriteBuffer& buffer) const { + buffer.writeScalar(fPhase); + buffer.writeScalarArray(fIntervals, fCount); +} + +sk_sp SkDashImpl::CreateProc(SkReadBuffer& buffer) { + const SkScalar phase = buffer.readScalar(); + uint32_t count = buffer.getArrayCount(); + + // Don't allocate gigantic buffers if there's not data for them. + if (!buffer.validateCanReadN(count)) { + return nullptr; + } + + AutoSTArray<32, SkScalar> intervals(count); + if (buffer.readScalarArray(intervals.get(), count)) { + return SkDashPathEffect::Make(intervals.get(), SkToInt(count), phase); + } + return nullptr; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkDashPathEffect::Make(const SkScalar intervals[], int count, SkScalar phase) { + if (!SkDashPath::ValidDashPath(phase, intervals, count)) { + return nullptr; + } + return sk_sp(new SkDashImpl(intervals, count, phase)); +} diff --git a/gfx/skia/skia/src/effects/SkDiscretePathEffect.cpp b/gfx/skia/skia/src/effects/SkDiscretePathEffect.cpp new file mode 100644 index 0000000000..1453d5d7c8 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkDiscretePathEffect.cpp @@ -0,0 +1,191 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFlattenable.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPathMeasure.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStrokeRec.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkDiscretePathEffect.h" +#include "include/private/base/SkFixed.h" +#include "src/core/SkPathEffectBase.h" +#include "src/core/SkPointPriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include + +class SkMatrix; + +/** \class LCGRandom + + Utility class that implements pseudo random 32bit numbers using a fast + linear equation. Unlike rand(), this class holds its own seed (initially + set to 0), so that multiple instances can be used with no side-effects. + + Copied from the original implementation of SkRandom. Only contains the + methods used by SkDiscretePathEffect::filterPath, with methods that were + not called directly moved to private. +*/ +class LCGRandom { +public: + LCGRandom(uint32_t seed) : fSeed(seed) {} + + /** Return the next pseudo random number expressed as a SkScalar + in the range [-SK_Scalar1..SK_Scalar1). + */ + SkScalar nextSScalar1() { return SkFixedToScalar(this->nextSFixed1()); } + +private: + /** Return the next pseudo random number as an unsigned 32bit value. + */ + uint32_t nextU() { uint32_t r = fSeed * kMul + kAdd; fSeed = r; return r; } + + /** Return the next pseudo random number as a signed 32bit value. + */ + int32_t nextS() { return (int32_t)this->nextU(); } + + /** Return the next pseudo random number expressed as a signed SkFixed + in the range [-SK_Fixed1..SK_Fixed1). + */ + SkFixed nextSFixed1() { return this->nextS() >> 15; } + + // See "Numerical Recipes in C", 1992 page 284 for these constants + enum { + kMul = 1664525, + kAdd = 1013904223 + }; + uint32_t fSeed; +}; + +static void Perterb(SkPoint* p, const SkVector& tangent, SkScalar scale) { + SkVector normal = tangent; + SkPointPriv::RotateCCW(&normal); + normal.setLength(scale); + *p += normal; +} + +class SK_API SkDiscretePathEffectImpl : public SkPathEffectBase { +public: + SkDiscretePathEffectImpl(SkScalar segLength, SkScalar deviation, uint32_t seedAssist) + : fSegLength(segLength), fPerterb(deviation), fSeedAssist(seedAssist) + { + SkASSERT(SkScalarIsFinite(segLength)); + SkASSERT(SkScalarIsFinite(deviation)); + SkASSERT(segLength > SK_ScalarNearlyZero); + } + + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect*, const SkMatrix&) const override { + bool doFill = rec->isFillStyle(); + + SkPathMeasure meas(src, doFill); + + /* Caller may supply their own seed assist, which by default is 0 */ + uint32_t seed = fSeedAssist ^ SkScalarRoundToInt(meas.getLength()); + + LCGRandom rand(seed ^ ((seed << 16) | (seed >> 16))); + SkScalar scale = fPerterb; + SkPoint p; + SkVector v; + + do { + SkScalar length = meas.getLength(); + #if defined(SK_BUILD_FOR_FUZZER) + if (length > 1000) { + return false; + } + #endif + + if (fSegLength * (2 + doFill) > length) { + meas.getSegment(0, length, dst, true); // to short for us to mangle + } else { + int n = SkScalarRoundToInt(length / fSegLength); + constexpr int kMaxReasonableIterations = 100000; + n = std::min(n, kMaxReasonableIterations); + SkScalar delta = length / n; + SkScalar distance = 0; + + if (meas.isClosed()) { + n -= 1; + distance += delta/2; + } + + if (meas.getPosTan(distance, &p, &v)) { + Perterb(&p, v, rand.nextSScalar1() * scale); + dst->moveTo(p); + } + while (--n >= 0) { + distance += delta; + if (meas.getPosTan(distance, &p, &v)) { + Perterb(&p, v, rand.nextSScalar1() * scale); + dst->lineTo(p); + } + } + if (meas.isClosed()) { + dst->close(); + } + } + } while (meas.nextContour()); + return true; + } + + bool computeFastBounds(SkRect* bounds) const override { + if (bounds) { + SkScalar maxOutset = SkScalarAbs(fPerterb); + bounds->outset(maxOutset, maxOutset); + } + return true; + } + + static sk_sp CreateProc(SkReadBuffer& buffer) { + SkScalar segLength = buffer.readScalar(); + SkScalar perterb = buffer.readScalar(); + uint32_t seed = buffer.readUInt(); + return SkDiscretePathEffect::Make(segLength, perterb, seed); + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeScalar(fSegLength); + buffer.writeScalar(fPerterb); + buffer.writeUInt(fSeedAssist); + } + + Factory getFactory() const override { return CreateProc; } + const char* getTypeName() const override { return "SkDiscretePathEffect"; } + +private: + const SkScalar fSegLength, + fPerterb; + /* Caller-supplied 32 bit seed assist */ + const uint32_t fSeedAssist; + + using INHERITED = SkPathEffectBase; +}; + +////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkDiscretePathEffect::Make(SkScalar segLength, SkScalar deviation, + uint32_t seedAssist) { + if (!SkScalarIsFinite(segLength) || !SkScalarIsFinite(deviation)) { + return nullptr; + } + if (segLength <= SK_ScalarNearlyZero) { + return nullptr; + } + return sk_sp(new SkDiscretePathEffectImpl(segLength, deviation, seedAssist)); +} + +void SkDiscretePathEffect::RegisterFlattenables() { + SkFlattenable::Register("SkDiscretePathEffect", SkDiscretePathEffectImpl::CreateProc); +} diff --git a/gfx/skia/skia/src/effects/SkEmbossMask.cpp b/gfx/skia/skia/src/effects/SkEmbossMask.cpp new file mode 100644 index 0000000000..c2f9a9d18b --- /dev/null +++ b/gfx/skia/skia/src/effects/SkEmbossMask.cpp @@ -0,0 +1,121 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/effects/SkEmbossMask.h" + +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkMask.h" + +#include +#include +#include + +static inline int nonzero_to_one(int x) { +#if 0 + return x != 0; +#else + return ((unsigned)(x | -x)) >> 31; +#endif +} + +static inline int neq_to_one(int x, int max) { +#if 0 + return x != max; +#else + SkASSERT(x >= 0 && x <= max); + return ((unsigned)(x - max)) >> 31; +#endif +} + +static inline int neq_to_mask(int x, int max) { +#if 0 + return -(x != max); +#else + SkASSERT(x >= 0 && x <= max); + return (x - max) >> 31; +#endif +} + +static inline unsigned div255(unsigned x) { + SkASSERT(x <= (255*255)); + return x * ((1 << 24) / 255) >> 24; +} + +#define kDelta 32 // small enough to show off angle differences + +void SkEmbossMask::Emboss(SkMask* mask, const SkEmbossMaskFilter::Light& light) { + SkASSERT(mask->fFormat == SkMask::k3D_Format); + + int specular = light.fSpecular; + int ambient = light.fAmbient; + SkFixed lx = SkScalarToFixed(light.fDirection[0]); + SkFixed ly = SkScalarToFixed(light.fDirection[1]); + SkFixed lz = SkScalarToFixed(light.fDirection[2]); + SkFixed lz_dot_nz = lz * kDelta; + int lz_dot8 = lz >> 8; + + size_t planeSize = mask->computeImageSize(); + uint8_t* alpha = mask->fImage; + uint8_t* multiply = (uint8_t*)alpha + planeSize; + uint8_t* additive = multiply + planeSize; + + int rowBytes = mask->fRowBytes; + int maxy = mask->fBounds.height() - 1; + int maxx = mask->fBounds.width() - 1; + + int prev_row = 0; + for (int y = 0; y <= maxy; y++) { + int next_row = neq_to_mask(y, maxy) & rowBytes; + + for (int x = 0; x <= maxx; x++) { + int nx = alpha[x + neq_to_one(x, maxx)] - alpha[x - nonzero_to_one(x)]; + int ny = alpha[x + next_row] - alpha[x - prev_row]; + + SkFixed numer = lx * nx + ly * ny + lz_dot_nz; + int mul = ambient; + int add = 0; + + if (numer > 0) { // preflight when numer/denom will be <= 0 + int denom = SkSqrt32(nx * nx + ny * ny + kDelta*kDelta); + SkFixed dot = numer / denom; + dot >>= 8; // now dot is 2^8 instead of 2^16 + mul = std::min(mul + dot, 255); + + // now for the reflection + + // R = 2 (Light * Normal) Normal - Light + // hilite = R * Eye(0, 0, 1) + + int hilite = (2 * dot - lz_dot8) * lz_dot8 >> 8; + if (hilite > 0) { + // pin hilite to 255, since our fast math is also a little sloppy + hilite = std::min(hilite, 255); + + // specular is 4.4 + // would really like to compute the fractional part of this + // and then possibly cache a 256 table for a given specular + // value in the light, and just pass that in to this function. + add = hilite; + for (int i = specular >> 4; i > 0; --i) { + add = div255(add * hilite); + } + } + } + multiply[x] = SkToU8(mul); + additive[x] = SkToU8(add); + } + alpha += rowBytes; + multiply += rowBytes; + additive += rowBytes; + prev_row = rowBytes; + } +} diff --git a/gfx/skia/skia/src/effects/SkEmbossMask.h b/gfx/skia/skia/src/effects/SkEmbossMask.h new file mode 100644 index 0000000000..9731732e0c --- /dev/null +++ b/gfx/skia/skia/src/effects/SkEmbossMask.h @@ -0,0 +1,21 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkEmbossMask_DEFINED +#define SkEmbossMask_DEFINED + +#include "src/effects/SkEmbossMaskFilter.h" + +struct SkMask; + +class SkEmbossMask { +public: + static void Emboss(SkMask* mask, const SkEmbossMaskFilter::Light&); +}; + +#endif diff --git a/gfx/skia/skia/src/effects/SkEmbossMaskFilter.cpp b/gfx/skia/skia/src/effects/SkEmbossMaskFilter.cpp new file mode 100644 index 0000000000..a42cf083fa --- /dev/null +++ b/gfx/skia/skia/src/effects/SkEmbossMaskFilter.cpp @@ -0,0 +1,150 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/effects/SkEmbossMaskFilter.h" + +#include "include/core/SkBlurTypes.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "src/core/SkBlurMask.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/effects/SkEmbossMask.h" + +#if defined(SK_SUPPORT_LEGACY_EMBOSSMASKFILTER) +#include "include/effects/SkBlurMaskFilter.h" +#endif + +#include + +static void normalize3(SkScalar dst[3], const SkScalar src[3]) { + SkScalar mag = SkScalarSquare(src[0]) + SkScalarSquare(src[1]) + SkScalarSquare(src[2]); + SkScalar scale = SkScalarInvert(SkScalarSqrt(mag)); + + for (int i = 0; i < 3; i++) { + dst[i] = src[i] * scale; + } +} + +sk_sp SkEmbossMaskFilter::Make(SkScalar blurSigma, const Light& light) { + if (!SkScalarIsFinite(blurSigma) || blurSigma <= 0) { + return nullptr; + } + + Light newLight = light; + normalize3(newLight.fDirection, light.fDirection); + if (!SkScalarsAreFinite(newLight.fDirection, 3)) { + return nullptr; + } + + return sk_sp(new SkEmbossMaskFilter(blurSigma, newLight)); +} + +#ifdef SK_SUPPORT_LEGACY_EMBOSSMASKFILTER +sk_sp SkBlurMaskFilter::MakeEmboss(SkScalar blurSigma, const SkScalar direction[3], + SkScalar ambient, SkScalar specular) { + if (direction == nullptr) { + return nullptr; + } + + SkEmbossMaskFilter::Light light; + + memcpy(light.fDirection, direction, sizeof(light.fDirection)); + // ambient should be 0...1 as a scalar + light.fAmbient = SkUnitScalarClampToByte(ambient); + // specular should be 0..15.99 as a scalar + static const SkScalar kSpecularMultiplier = SkIntToScalar(255) / 16; + light.fSpecular = static_cast(SkTPin(specular, 0.0f, 16.0f) * kSpecularMultiplier + 0.5); + + return SkEmbossMaskFilter::Make(blurSigma, light); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +SkEmbossMaskFilter::SkEmbossMaskFilter(SkScalar blurSigma, const Light& light) + : fLight(light), fBlurSigma(blurSigma) +{ + SkASSERT(fBlurSigma > 0); + SkASSERT(SkScalarsAreFinite(fLight.fDirection, 3)); +} + +SkMask::Format SkEmbossMaskFilter::getFormat() const { + return SkMask::k3D_Format; +} + +bool SkEmbossMaskFilter::filterMask(SkMask* dst, const SkMask& src, + const SkMatrix& matrix, SkIPoint* margin) const { + if (src.fFormat != SkMask::kA8_Format) { + return false; + } + + SkScalar sigma = matrix.mapRadius(fBlurSigma); + + if (!SkBlurMask::BoxBlur(dst, src, sigma, kInner_SkBlurStyle)) { + return false; + } + + dst->fFormat = SkMask::k3D_Format; + if (margin) { + margin->set(SkScalarCeilToInt(3*sigma), SkScalarCeilToInt(3*sigma)); + } + + if (src.fImage == nullptr) { + return true; + } + + // create a larger buffer for the other two channels (should force fBlur to do this for us) + + { + uint8_t* alphaPlane = dst->fImage; + size_t planeSize = dst->computeImageSize(); + if (0 == planeSize) { + return false; // too big to allocate, abort + } + dst->fImage = SkMask::AllocImage(planeSize * 3); + memcpy(dst->fImage, alphaPlane, planeSize); + SkMask::FreeImage(alphaPlane); + } + + // run the light direction through the matrix... + Light light = fLight; + matrix.mapVectors((SkVector*)(void*)light.fDirection, + (SkVector*)(void*)fLight.fDirection, 1); + + // now restore the length of the XY component + // cast to SkVector so we can call setLength (this double cast silences alias warnings) + SkVector* vec = (SkVector*)(void*)light.fDirection; + vec->setLength(light.fDirection[0], + light.fDirection[1], + SkPoint::Length(fLight.fDirection[0], fLight.fDirection[1])); + + SkEmbossMask::Emboss(dst, light); + + // restore original alpha + memcpy(dst->fImage, src.fImage, src.computeImageSize()); + + return true; +} + +sk_sp SkEmbossMaskFilter::CreateProc(SkReadBuffer& buffer) { + Light light; + if (buffer.readByteArray(&light, sizeof(Light))) { + light.fPad = 0; // for the font-cache lookup to be clean + const SkScalar sigma = buffer.readScalar(); + return Make(sigma, light); + } + return nullptr; +} + +void SkEmbossMaskFilter::flatten(SkWriteBuffer& buffer) const { + Light tmpLight = fLight; + tmpLight.fPad = 0; // for the font-cache lookup to be clean + buffer.writeByteArray(&tmpLight, sizeof(tmpLight)); + buffer.writeScalar(fBlurSigma); +} diff --git a/gfx/skia/skia/src/effects/SkEmbossMaskFilter.h b/gfx/skia/skia/src/effects/SkEmbossMaskFilter.h new file mode 100644 index 0000000000..aff67d9140 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkEmbossMaskFilter.h @@ -0,0 +1,61 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkEmbossMaskFilter_DEFINED +#define SkEmbossMaskFilter_DEFINED + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskFilterBase.h" + +#include + +class SkMatrix; +class SkReadBuffer; +class SkWriteBuffer; +struct SkIPoint; + +/** \class SkEmbossMaskFilter + + This mask filter creates a 3D emboss look, by specifying a light and blur amount. +*/ +class SkEmbossMaskFilter : public SkMaskFilterBase { +public: + struct Light { + SkScalar fDirection[3]; // x,y,z + uint16_t fPad; + uint8_t fAmbient; + uint8_t fSpecular; // exponent, 4.4 right now + }; + + static sk_sp Make(SkScalar blurSigma, const Light& light); + + // overrides from SkMaskFilter + // This method is not exported to java. + SkMask::Format getFormat() const override; + // This method is not exported to java. + bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&, + SkIPoint* margin) const override; + +protected: + SkEmbossMaskFilter(SkScalar blurSigma, const Light& light); + void flatten(SkWriteBuffer&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkEmbossMaskFilter) + + Light fLight; + SkScalar fBlurSigma; + + using INHERITED = SkMaskFilter; +}; + +#endif diff --git a/gfx/skia/skia/src/effects/SkHighContrastFilter.cpp b/gfx/skia/skia/src/effects/SkHighContrastFilter.cpp new file mode 100644 index 0000000000..b663839d22 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkHighContrastFilter.cpp @@ -0,0 +1,104 @@ +/* +* Copyright 2017 Google Inc. +* +* Use of this source code is governed by a BSD-style license that can be +* found in the LICENSE file. +*/ + +#include "include/effects/SkHighContrastFilter.h" + +#include "include/core/SkColorFilter.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +#ifdef SK_ENABLE_SKSL +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/core/SkString.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/base/SkTPin.h" +#include "modules/skcms/skcms.h" +#include "src/core/SkColorFilterPriv.h" +#include "src/core/SkRuntimeEffectPriv.h" + +#include + +sk_sp SkHighContrastFilter::Make(const SkHighContrastConfig& config) { + if (!config.isValid()) { + return nullptr; + } + + struct Uniforms { float grayscale, invertStyle, contrast; }; + + static constexpr char kHighContrastFilterCode[] = + "uniform half grayscale, invertStyle, contrast;" + + // TODO(skia:13540): Investigate using $rgb_to_hsl from sksl_shared instead. + "half3 rgb_to_hsl(half3 c) {" + "half mx = max(max(c.r,c.g),c.b)," + "mn = min(min(c.r,c.g),c.b)," + "d = mx-mn," + "invd = 1.0 / d," + "g_lt_b = c.g < c.b ? 6.0 : 0.0;" + + // We'd prefer to write these tests like `mx == c.r`, but on some GPUs max(x,y) is + // not always equal to either x or y. So we use long form, c.r >= c.g && c.r >= c.b. + "half h = (1/6.0) * (mx == mn ? 0.0 :" + /*mx==c.r*/ "c.r >= c.g && c.r >= c.b ? invd * (c.g - c.b) + g_lt_b :" + /*mx==c.g*/ "c.g >= c.b ? invd * (c.b - c.r) + 2.0" + /*mx==c.b*/ ": invd * (c.r - c.g) + 4.0);" + "half sum = mx+mn," + "l = sum * 0.5," + "s = mx == mn ? 0.0" + ": d / (l > 0.5 ? 2.0 - sum : sum);" + "return half3(h,s,l);" + "}" + "half4 main(half4 inColor) {" + "half4 c = inColor;" // linear unpremul RGBA in dst gamut + "if (grayscale == 1) {" + "c.rgb = dot(half3(0.2126, 0.7152, 0.0722), c.rgb).rrr;" + "}" + "if (invertStyle == 1) {" // brightness + "c.rgb = 1 - c.rgb;" + "} else if (invertStyle == 2) {" // lightness + "c.rgb = rgb_to_hsl(c.rgb);" + "c.b = 1 - c.b;" + "c.rgb = $hsl_to_rgb(c.rgb);" + "}" + "c.rgb = mix(half3(0.5), c.rgb, contrast);" + "return half4(saturate(c.rgb), c.a);" + "}"; + + static const SkRuntimeEffect* effect = SkMakeCachedRuntimeEffect( + SkRuntimeEffect::MakeForColorFilter, + SkString(kHighContrastFilterCode) + ).release(); + + SkASSERT(effect); + + // A contrast setting of exactly +1 would divide by zero (1+c)/(1-c), so pull in to +1-ε. + // I'm not exactly sure why we've historically pinned -1 up to -1+ε, maybe just symmetry? + float c = SkTPin(config.fContrast, + -1.0f + FLT_EPSILON, + +1.0f - FLT_EPSILON); + + Uniforms uniforms = { + config.fGrayscale ? 1.0f : 0.0f, + (float)config.fInvertStyle, // 0.0f for none, 1.0f for brightness, 2.0f for lightness + (1+c)/(1-c), + }; + + skcms_TransferFunction linear = SkNamedTransferFn::kLinear; + SkAlphaType unpremul = kUnpremul_SkAlphaType; + return SkColorFilterPriv::WithWorkingFormat( + effect->makeColorFilter(SkData::MakeWithCopy(&uniforms,sizeof(uniforms))), + &linear, nullptr/*use dst gamut*/, &unpremul); +} +#else // SK_ENABLE_SKSL +sk_sp SkHighContrastFilter::Make(const SkHighContrastConfig& config) { + // TODO(skia:12197) + return nullptr; +} +#endif + diff --git a/gfx/skia/skia/src/effects/SkLayerDrawLooper.cpp b/gfx/skia/skia/src/effects/SkLayerDrawLooper.cpp new file mode 100644 index 0000000000..3fafaf00e3 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkLayerDrawLooper.cpp @@ -0,0 +1,339 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#ifdef SK_SUPPORT_LEGACY_DRAWLOOPER +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkString.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/effects/SkBlurDrawLooper.h" +#include "include/effects/SkLayerDrawLooper.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkStringUtils.h" +#include "src/core/SkWriteBuffer.h" +#include "src/core/SkXfermodePriv.h" + +SkLayerDrawLooper::LayerInfo::LayerInfo() { + fPaintBits = 0; // ignore our paint fields + fColorMode = SkBlendMode::kDst; // ignore our color + fOffset.set(0, 0); + fPostTranslate = false; +} + +SkLayerDrawLooper::SkLayerDrawLooper() + : fRecs(nullptr), + fCount(0) { +} + +SkLayerDrawLooper::~SkLayerDrawLooper() { + Rec* rec = fRecs; + while (rec) { + Rec* next = rec->fNext; + delete rec; + rec = next; + } +} + +SkLayerDrawLooper::Context* +SkLayerDrawLooper::makeContext(SkArenaAlloc* alloc) const { + return alloc->make(this); +} + +static SkColor4f xferColor(const SkColor4f& src, const SkColor4f& dst, SkBlendMode mode) { + switch (mode) { + case SkBlendMode::kSrc: + return src; + case SkBlendMode::kDst: + return dst; + default: { + SkPMColor4f pmS = src.premul(); + SkPMColor4f pmD = dst.premul(); + return SkBlendMode_Apply(mode, pmS, pmD).unpremul(); + } + } +} + +// Even with kEntirePaint_Bits, we always ensure that the base paint's +// text-encoding is respected, since that controls how we interpret the +// text/length parameters of a draw[Pos]Text call. +void SkLayerDrawLooper::LayerDrawLooperContext::ApplyInfo( + SkPaint* dst, const SkPaint& src, const LayerInfo& info) { + SkColor4f srcColor = src.getColor4f(); +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + // The framework may respect the alpha value on the original paint. + // Match this legacy behavior. + if (src.getAlpha() == 255) { + srcColor.fA = dst->getColor4f().fA; + } +#endif + dst->setColor4f(xferColor(srcColor, dst->getColor4f(), (SkBlendMode)info.fColorMode), + sk_srgb_singleton()); + + BitFlags bits = info.fPaintBits; + + if (0 == bits) { + return; + } + if (kEntirePaint_Bits == bits) { + // we've already computed these, so save it from the assignment + bool aa = dst->isAntiAlias(); + bool di = dst->isDither(); + SkColor4f c = dst->getColor4f(); + *dst = src; + dst->setAntiAlias(aa); + dst->setDither(di); + dst->setColor4f(c, sk_srgb_singleton()); + return; + } + + if (bits & kStyle_Bit) { + dst->setStyle(src.getStyle()); + dst->setStrokeWidth(src.getStrokeWidth()); + dst->setStrokeMiter(src.getStrokeMiter()); + dst->setStrokeCap(src.getStrokeCap()); + dst->setStrokeJoin(src.getStrokeJoin()); + } + + if (bits & kPathEffect_Bit) { + dst->setPathEffect(src.refPathEffect()); + } + if (bits & kMaskFilter_Bit) { + dst->setMaskFilter(src.refMaskFilter()); + } + if (bits & kShader_Bit) { + dst->setShader(src.refShader()); + } + if (bits & kColorFilter_Bit) { + dst->setColorFilter(src.refColorFilter()); + } + if (bits & kXfermode_Bit) { + dst->setBlender(src.refBlender()); + } + + // we don't override these +#if 0 + dst->setTypeface(src.getTypeface()); + dst->setTextSize(src.getTextSize()); + dst->setTextScaleX(src.getTextScaleX()); + dst->setRasterizer(src.getRasterizer()); + dst->setLooper(src.getLooper()); + dst->setTextEncoding(src.getTextEncoding()); + dst->setHinting(src.getHinting()); +#endif +} + +SkLayerDrawLooper::LayerDrawLooperContext::LayerDrawLooperContext( + const SkLayerDrawLooper* looper) : fCurrRec(looper->fRecs) {} + +bool SkLayerDrawLooper::LayerDrawLooperContext::next(Info* info, SkPaint* paint) { + if (nullptr == fCurrRec) { + return false; + } + + ApplyInfo(paint, fCurrRec->fPaint, fCurrRec->fInfo); + + if (info) { + info->fTranslate = fCurrRec->fInfo.fOffset; + info->fApplyPostCTM = fCurrRec->fInfo.fPostTranslate; + } + fCurrRec = fCurrRec->fNext; + return true; +} + +bool SkLayerDrawLooper::asABlurShadow(BlurShadowRec* bsRec) const { + if (fCount != 2) { + return false; + } + const Rec* rec = fRecs; + + // bottom layer needs to be just blur(maskfilter) + if ((rec->fInfo.fPaintBits & ~kMaskFilter_Bit)) { + return false; + } + if (SkBlendMode::kSrc != (SkBlendMode)rec->fInfo.fColorMode) { + return false; + } + const SkMaskFilter* mf = rec->fPaint.getMaskFilter(); + if (nullptr == mf) { + return false; + } + SkMaskFilterBase::BlurRec maskBlur; + if (!as_MFB(mf)->asABlur(&maskBlur)) { + return false; + } + + rec = rec->fNext; + // top layer needs to be "plain" + if (rec->fInfo.fPaintBits) { + return false; + } + if (SkBlendMode::kDst != (SkBlendMode)rec->fInfo.fColorMode) { + return false; + } + if (!rec->fInfo.fOffset.equals(0, 0)) { + return false; + } + + if (bsRec) { + bsRec->fSigma = maskBlur.fSigma; + bsRec->fOffset = fRecs->fInfo.fOffset; + // TODO: Update BlurShadowRec to use SkColor4f? + bsRec->fColor = fRecs->fPaint.getColor(); + bsRec->fStyle = maskBlur.fStyle; + } + return true; +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkLayerDrawLooper::flatten(SkWriteBuffer& buffer) const { + buffer.writeInt(fCount); + + Rec* rec = fRecs; + for (int i = 0; i < fCount; i++) { + // Legacy "flagsmask" field -- now ignored, remove when we bump version + buffer.writeInt(0); + + buffer.writeInt(rec->fInfo.fPaintBits); + buffer.writeInt((int)rec->fInfo.fColorMode); + buffer.writePoint(rec->fInfo.fOffset); + buffer.writeBool(rec->fInfo.fPostTranslate); + buffer.writePaint(rec->fPaint); + rec = rec->fNext; + } +} + +sk_sp SkLayerDrawLooper::CreateProc(SkReadBuffer& buffer) { + int count = buffer.readInt(); + +#if defined(SK_BUILD_FOR_FUZZER) + if (count > 100) { + count = 100; + } +#endif + Builder builder; + for (int i = 0; i < count; i++) { + LayerInfo info; + // Legacy "flagsmask" field -- now ignored, remove when we bump version + (void)buffer.readInt(); + + info.fPaintBits = buffer.readInt(); + info.fColorMode = (SkBlendMode)buffer.readInt(); + buffer.readPoint(&info.fOffset); + info.fPostTranslate = buffer.readBool(); + *builder.addLayerOnTop(info) = buffer.readPaint(); + if (!buffer.isValid()) { + return nullptr; + } + } + return builder.detach(); +} + +SkLayerDrawLooper::Builder::Builder() + : fRecs(nullptr), + fTopRec(nullptr), + fCount(0) { +} + +SkLayerDrawLooper::Builder::~Builder() { + Rec* rec = fRecs; + while (rec) { + Rec* next = rec->fNext; + delete rec; + rec = next; + } +} + +SkPaint* SkLayerDrawLooper::Builder::addLayer(const LayerInfo& info) { + fCount += 1; + + Rec* rec = new Rec; + rec->fNext = fRecs; + rec->fInfo = info; + fRecs = rec; + if (nullptr == fTopRec) { + fTopRec = rec; + } + + return &rec->fPaint; +} + +void SkLayerDrawLooper::Builder::addLayer(SkScalar dx, SkScalar dy) { + LayerInfo info; + + info.fOffset.set(dx, dy); + (void)this->addLayer(info); +} + +SkPaint* SkLayerDrawLooper::Builder::addLayerOnTop(const LayerInfo& info) { + fCount += 1; + + Rec* rec = new Rec; + rec->fNext = nullptr; + rec->fInfo = info; + if (nullptr == fRecs) { + fRecs = rec; + } else { + SkASSERT(fTopRec); + fTopRec->fNext = rec; + } + fTopRec = rec; + + return &rec->fPaint; +} + +sk_sp SkLayerDrawLooper::Builder::detach() { + SkLayerDrawLooper* looper = new SkLayerDrawLooper; + looper->fCount = fCount; + looper->fRecs = fRecs; + + fCount = 0; + fRecs = nullptr; + fTopRec = nullptr; + + return sk_sp(looper); +} + +sk_sp SkBlurDrawLooper::Make(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy) +{ + return Make(SkColor4f::FromColor(color), sk_srgb_singleton(), sigma, dx, dy); +} + +sk_sp SkBlurDrawLooper::Make(SkColor4f color, SkColorSpace* cs, + SkScalar sigma, SkScalar dx, SkScalar dy) +{ + sk_sp blur = nullptr; + if (sigma > 0.0f) { + blur = SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, sigma, true); + } + + SkLayerDrawLooper::Builder builder; + + // First layer + SkLayerDrawLooper::LayerInfo defaultLayer; + builder.addLayer(defaultLayer); + + // Blur layer + SkLayerDrawLooper::LayerInfo blurInfo; + blurInfo.fColorMode = SkBlendMode::kSrc; + blurInfo.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit; + blurInfo.fOffset = SkVector::Make(dx, dy); + SkPaint* paint = builder.addLayer(blurInfo); + paint->setMaskFilter(std::move(blur)); + paint->setColor4f(color, cs); + + return builder.detach(); +} + +#endif diff --git a/gfx/skia/skia/src/effects/SkLumaColorFilter.cpp b/gfx/skia/skia/src/effects/SkLumaColorFilter.cpp new file mode 100644 index 0000000000..045200f263 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkLumaColorFilter.cpp @@ -0,0 +1,36 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/effects/SkLumaColorFilter.h" + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkColorFilter; + +#ifdef SK_ENABLE_SKSL +#include "include/core/SkData.h" +#include "include/effects/SkRuntimeEffect.h" +#include "src/core/SkRuntimeEffectPriv.h" + +sk_sp SkLumaColorFilter::Make() { + + static const SkRuntimeEffect* effect = SkMakeCachedRuntimeEffect( + SkRuntimeEffect::MakeForColorFilter, + "half4 main(half4 inColor) {" + "return saturate(dot(half3(0.2126, 0.7152, 0.0722), inColor.rgb)).000r;" + "}" + ).release(); + SkASSERT(effect); + + return effect->makeColorFilter(SkData::MakeEmpty()); +} +#else // SK_ENABLE_SKSL +sk_sp SkLumaColorFilter::Make() { + // TODO(skia:12197) + return nullptr; +} +#endif diff --git a/gfx/skia/skia/src/effects/SkOpPE.h b/gfx/skia/skia/src/effects/SkOpPE.h new file mode 100644 index 0000000000..11c968fc6d --- /dev/null +++ b/gfx/skia/skia/src/effects/SkOpPE.h @@ -0,0 +1,102 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOpPE_DEFINED +#define SkOpPE_DEFINED + +#include "include/pathops/SkPathOps.h" +#include "src/core/SkPathEffectBase.h" + +class SkOpPE : public SkPathEffectBase { +public: + SkOpPE(sk_sp one, sk_sp two, SkPathOp op); + + +protected: + void flatten(SkWriteBuffer&) const override; + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkOpPE) + + bool computeFastBounds(SkRect* bounds) const override; + + sk_sp fOne; + sk_sp fTwo; + SkPathOp fOp; + + using INHERITED = SkPathEffectBase; +}; + +class SkMatrixPE : public SkPathEffectBase { +public: + SkMatrixPE(const SkMatrix&); + +protected: + void flatten(SkWriteBuffer&) const override; + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkMatrixPE) + + bool computeFastBounds(SkRect* bounds) const override { + if (bounds) { + fMatrix.mapRect(bounds); + } + return true; + } + + SkMatrix fMatrix; + + using INHERITED = SkPathEffectBase; +}; + +class SkStrokePE : public SkPathEffectBase { +public: + SkStrokePE(SkScalar width, SkPaint::Join, SkPaint::Cap, SkScalar miter); + +protected: + void flatten(SkWriteBuffer&) const override; + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkStrokePE) + + bool computeFastBounds(SkRect* bounds) const override; + + SkScalar fWidth, + fMiter; + SkPaint::Join fJoin; + SkPaint::Cap fCap; + + using INHERITED = SkPathEffectBase; +}; + +class SkStrokeAndFillPE : public SkPathEffectBase { +public: + SkStrokeAndFillPE() {} + +protected: + void flatten(SkWriteBuffer&) const override; + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkStrokeAndFillPE) + + bool computeFastBounds(SkRect* bounds) const override { + // The effect's bounds depend on the StrokeRect that is not yet available + return false; + } + + using INHERITED = SkPathEffectBase; +}; + +#endif diff --git a/gfx/skia/skia/src/effects/SkOpPathEffect.cpp b/gfx/skia/skia/src/effects/SkOpPathEffect.cpp new file mode 100644 index 0000000000..722f1401ae --- /dev/null +++ b/gfx/skia/skia/src/effects/SkOpPathEffect.cpp @@ -0,0 +1,242 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkOpPathEffect.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStrokeRec.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkPathEnums.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkPathEffectBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/effects/SkOpPE.h" + +#include + +sk_sp SkMergePathEffect::Make(sk_sp one, sk_sp two, + SkPathOp op) { + return sk_sp(new SkOpPE(std::move(one), std::move(two), op)); +} + +SkOpPE::SkOpPE(sk_sp one, sk_sp two, SkPathOp op) + : fOne(std::move(one)), fTwo(std::move(two)), fOp(op) {} + +bool SkOpPE::onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect* cull, const SkMatrix& ctm) const { + SkPath one, two; + if (fOne) { + if (!fOne->filterPath(&one, src, rec, cull, ctm)) { + return false; + } + } else { + one = src; + } + if (fTwo) { + if (!fTwo->filterPath(&two, src, rec, cull, ctm)) { + return false; + } + } else { + two = src; + } + return Op(one, two, fOp, dst); +} + +bool SkOpPE::computeFastBounds(SkRect* bounds) const { + if (!bounds) { + return (!SkToBool(fOne) || as_PEB(fOne)->computeFastBounds(nullptr)) && + (!SkToBool(fTwo) || as_PEB(fTwo)->computeFastBounds(nullptr)); + } + + // bounds will hold the result of the fOne while b2 holds the result of fTwo's fast bounds + SkRect b2 = *bounds; + if (fOne && !as_PEB(fOne)->computeFastBounds(bounds)) { + return false; + } + if (fTwo && !as_PEB(fTwo)->computeFastBounds(&b2)) { + return false; + } + + switch (fOp) { + case SkPathOp::kIntersect_SkPathOp: + if (!bounds->intersect(b2)) { + bounds->setEmpty(); + } + break; + case SkPathOp::kDifference_SkPathOp: + // (one - two) conservatively leaves one's bounds unmodified + break; + case SkPathOp::kReverseDifference_SkPathOp: + // (two - one) conservatively leaves two's bounds unmodified + *bounds = b2; + break; + case SkPathOp::kXOR_SkPathOp: + // fall through to union since XOR computes a subset of regular OR + case SkPathOp::kUnion_SkPathOp: + bounds->join(b2); + break; + } + + return true; +} + +void SkOpPE::flatten(SkWriteBuffer& buffer) const { + buffer.writeFlattenable(fOne.get()); + buffer.writeFlattenable(fTwo.get()); + buffer.write32(fOp); +} + +sk_sp SkOpPE::CreateProc(SkReadBuffer& buffer) { + auto one = buffer.readPathEffect(); + auto two = buffer.readPathEffect(); + SkPathOp op = buffer.read32LE(kReverseDifference_SkPathOp); + return buffer.isValid() ? SkMergePathEffect::Make(std::move(one), std::move(two), op) : nullptr; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkMatrixPathEffect::MakeTranslate(SkScalar dx, SkScalar dy) { + if (!SkScalarsAreFinite(dx, dy)) { + return nullptr; + } + return sk_sp(new SkMatrixPE(SkMatrix::Translate(dx, dy))); +} + +sk_sp SkMatrixPathEffect::Make(const SkMatrix& matrix) { + if (!matrix.isFinite()) { + return nullptr; + } + return sk_sp(new SkMatrixPE(matrix)); +} + +SkMatrixPE::SkMatrixPE(const SkMatrix& matrix) : fMatrix(matrix) { + SkASSERT(matrix.isFinite()); +} + +bool SkMatrixPE::onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const { + src.transform(fMatrix, dst); + return true; +} + +void SkMatrixPE::flatten(SkWriteBuffer& buffer) const { + buffer.writeMatrix(fMatrix); +} + +sk_sp SkMatrixPE::CreateProc(SkReadBuffer& buffer) { + SkMatrix mx; + buffer.readMatrix(&mx); + return buffer.isValid() ? SkMatrixPathEffect::Make(mx) : nullptr; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkStrokePathEffect::Make(SkScalar width, SkPaint::Join join, SkPaint::Cap cap, + SkScalar miter) { + if (!SkScalarsAreFinite(width, miter) || width < 0 || miter < 0) { + return nullptr; + } + return sk_sp(new SkStrokePE(width, join, cap, miter)); +} + +SkStrokePE::SkStrokePE(SkScalar width, SkPaint::Join join, SkPaint::Cap cap, SkScalar miter) + : fWidth(width), fMiter(miter), fJoin(join), fCap(cap) {} + +bool SkStrokePE::onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const { + SkStrokeRec rec(SkStrokeRec::kFill_InitStyle); + rec.setStrokeStyle(fWidth); + rec.setStrokeParams(fCap, fJoin, fMiter); + return rec.applyToPath(dst, src); +} + +bool SkStrokePE::computeFastBounds(SkRect* bounds) const { + if (bounds) { + SkStrokeRec rec(SkStrokeRec::kFill_InitStyle); + rec.setStrokeStyle(fWidth); + rec.setStrokeParams(fCap, fJoin, fMiter); + bounds->outset(rec.getInflationRadius(), rec.getInflationRadius()); + } + return true; +} + +void SkStrokePE::flatten(SkWriteBuffer& buffer) const { + buffer.writeScalar(fWidth); + buffer.writeScalar(fMiter); + buffer.write32(fJoin); + buffer.write32(fCap); +} + +sk_sp SkStrokePE::CreateProc(SkReadBuffer& buffer) { + SkScalar width = buffer.readScalar(); + SkScalar miter = buffer.readScalar(); + SkPaint::Join join = buffer.read32LE(SkPaint::kLast_Join); + SkPaint::Cap cap = buffer.read32LE(SkPaint::kLast_Cap); + return buffer.isValid() ? SkStrokePathEffect::Make(width, join, cap, miter) : nullptr; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +#include "include/effects/SkStrokeAndFillPathEffect.h" +#include "src/core/SkPathPriv.h" + +sk_sp SkStrokeAndFillPathEffect::Make() { + static SkPathEffect* strokeAndFill = new SkStrokeAndFillPE; + return sk_ref_sp(strokeAndFill); +} + +void SkStrokeAndFillPE::flatten(SkWriteBuffer&) const {} + +static bool known_to_be_opposite_directions(const SkPath& a, const SkPath& b) { + auto a_dir = SkPathPriv::ComputeFirstDirection(a), + b_dir = SkPathPriv::ComputeFirstDirection(b); + + return (a_dir == SkPathFirstDirection::kCCW && + b_dir == SkPathFirstDirection::kCW) + || + (a_dir == SkPathFirstDirection::kCW && + b_dir == SkPathFirstDirection::kCCW); +} + +bool SkStrokeAndFillPE::onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec* rec, + const SkRect*, const SkMatrix&) const { + // This one is weird, since we exist to allow this paint-style to go away. If we see it, + // just let the normal machine run its course. + if (rec->getStyle() == SkStrokeRec::kStrokeAndFill_Style) { + *dst = src; + return true; + } + + if (rec->getStyle() == SkStrokeRec::kStroke_Style) { + if (!rec->applyToPath(dst, src)) { + return false; + } + + if (known_to_be_opposite_directions(src, *dst)) { + dst->reverseAddPath(src); + } else { + dst->addPath(src); + } + } else { + *dst = src; + } + rec->setFillStyle(); + return true; +} + +sk_sp SkStrokeAndFillPE::CreateProc(SkReadBuffer& buffer) { + return SkStrokeAndFillPathEffect::Make(); +} diff --git a/gfx/skia/skia/src/effects/SkOverdrawColorFilter.cpp b/gfx/skia/skia/src/effects/SkOverdrawColorFilter.cpp new file mode 100644 index 0000000000..5968ebbcf4 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkOverdrawColorFilter.cpp @@ -0,0 +1,57 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkOverdrawColorFilter.h" + +#include "include/core/SkColorFilter.h" + +#ifdef SK_ENABLE_SKSL +#include "include/core/SkAlphaType.h" +#include "include/core/SkData.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkColorData.h" +#include "src/core/SkRuntimeEffectPriv.h" + +#include + +sk_sp SkOverdrawColorFilter::MakeWithSkColors(const SkColor colors[kNumColors]) { + static const SkRuntimeEffect* effect = SkMakeCachedRuntimeEffect( + SkRuntimeEffect::MakeForColorFilter, + "uniform half4 color0;" + "uniform half4 color1;" + "uniform half4 color2;" + "uniform half4 color3;" + "uniform half4 color4;" + "uniform half4 color5;" + + "half4 main(half4 color) {" + "half alpha = 255.0 * color.a;" + "color = alpha < 0.5 ? color0" + ": alpha < 1.5 ? color1" + ": alpha < 2.5 ? color2" + ": alpha < 3.5 ? color3" + ": alpha < 4.5 ? color4 : color5;" + "return color;" + "}" + ).release(); + + if (effect) { + auto data = SkData::MakeUninitialized(kNumColors * sizeof(SkPMColor4f)); + SkPMColor4f* premul = (SkPMColor4f*)data->writable_data(); + for (int i = 0; i < kNumColors; ++i) { + premul[i] = SkColor4f::FromColor(colors[i]).premul(); + } + return effect->makeColorFilter(std::move(data)); + } + return nullptr; +} +#else // SK_ENABLE_SKSL +sk_sp SkOverdrawColorFilter::MakeWithSkColors(const SkColor colors[kNumColors]) { + // TODO(skia:12197) + return nullptr; +} +#endif diff --git a/gfx/skia/skia/src/effects/SkShaderMaskFilter.cpp b/gfx/skia/skia/src/effects/SkShaderMaskFilter.cpp new file mode 100644 index 0000000000..d4b34f0b22 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkShaderMaskFilter.cpp @@ -0,0 +1,156 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkShaderMaskFilter.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkShader.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkShaderBase.h" + +#include +#include +#include +#include + +class SkMatrix; + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrFragmentProcessor.h" +struct GrFPArgs; +#endif + +class SkShaderMF : public SkMaskFilterBase { +public: + SkShaderMF(sk_sp shader) : fShader(std::move(shader)) {} + + SkMask::Format getFormat() const override { return SkMask::kA8_Format; } + + bool filterMask(SkMask* dst, const SkMask& src, const SkMatrix&, + SkIPoint* margin) const override; + + void computeFastBounds(const SkRect& src, SkRect* dst) const override { + *dst = src; + } + + bool asABlur(BlurRec*) const override { return false; } + +protected: +#if defined(SK_GANESH) + std::unique_ptr onAsFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; + bool onHasFragmentProcessor() const override; +#endif + +private: + SK_FLATTENABLE_HOOKS(SkShaderMF) + + sk_sp fShader; + + SkShaderMF(SkReadBuffer&); + void flatten(SkWriteBuffer&) const override; + + friend class SkShaderMaskFilter; + + using INHERITED = SkMaskFilter; +}; + +sk_sp SkShaderMF::CreateProc(SkReadBuffer& buffer) { + return SkShaderMaskFilter::Make(buffer.readShader()); +} + +void SkShaderMF::flatten(SkWriteBuffer& buffer) const { + buffer.writeFlattenable(fShader.get()); +} + +static void rect_memcpy(void* dst, size_t dstRB, const void* src, size_t srcRB, + size_t copyBytes, int rows) { + for (int i = 0; i < rows; ++i) { + memcpy(dst, src, copyBytes); + dst = (char*)dst + dstRB; + src = (const char*)src + srcRB; + } +} + +bool SkShaderMF::filterMask(SkMask* dst, const SkMask& src, const SkMatrix& ctm, + SkIPoint* margin) const { + if (src.fFormat != SkMask::kA8_Format) { + return false; + } + + if (margin) { + margin->set(0, 0); + } + dst->fBounds = src.fBounds; + dst->fRowBytes = src.fBounds.width(); // need alignment? + dst->fFormat = SkMask::kA8_Format; + + if (src.fImage == nullptr) { + dst->fImage = nullptr; + return true; + } + size_t size = dst->computeImageSize(); + if (0 == size) { + return false; // too big to allocate, abort + } + + // Allocate and initialize dst image with a copy of the src image + dst->fImage = SkMask::AllocImage(size); + rect_memcpy(dst->fImage, dst->fRowBytes, src.fImage, src.fRowBytes, + src.fBounds.width() * sizeof(uint8_t), src.fBounds.height()); + + // Now we have a dst-mask, just need to setup a canvas and draw into it + SkBitmap bitmap; + if (!bitmap.installMaskPixels(*dst)) { + return false; + } + + SkPaint paint; + paint.setShader(fShader); + // this blendmode is the trick: we only draw the shader where the mask is + paint.setBlendMode(SkBlendMode::kSrcIn); + + SkCanvas canvas(bitmap); + canvas.translate(-SkIntToScalar(dst->fBounds.fLeft), -SkIntToScalar(dst->fBounds.fTop)); + canvas.concat(ctm); + canvas.drawPaint(paint); + return true; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// +#if defined(SK_GANESH) + +std::unique_ptr +SkShaderMF::onAsFragmentProcessor(const GrFPArgs& args, const MatrixRec& mRec) const { + auto fp = as_SB(fShader)->asFragmentProcessor(args, mRec); + return GrFragmentProcessor::MulInputByChildAlpha(std::move(fp)); +} + +bool SkShaderMF::onHasFragmentProcessor() const { + return true; +} + +#endif +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkShaderMaskFilter::Make(sk_sp shader) { + return shader ? sk_sp(new SkShaderMF(std::move(shader))) : nullptr; +} + +void SkShaderMaskFilter::RegisterFlattenables() { SK_REGISTER_FLATTENABLE(SkShaderMF); } diff --git a/gfx/skia/skia/src/effects/SkTableColorFilter.cpp b/gfx/skia/skia/src/effects/SkTableColorFilter.cpp new file mode 100644 index 0000000000..caab146aee --- /dev/null +++ b/gfx/skia/skia/src/effects/SkTableColorFilter.cpp @@ -0,0 +1,344 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLSampleUsage.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkEffectPriv.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkRasterPipelineOpContexts.h" +#include "src/core/SkRasterPipelineOpList.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Image_Graphite.h" +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/Log.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#include "src/gpu/graphite/RecorderPriv.h" + +namespace skgpu::graphite { +class PipelineDataGatherer; +} +#endif + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrTypes.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrProcessorUnitTest.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h" + +class GrRecordingContext; +struct GrShaderCaps; +namespace skgpu { class KeyBuilder; } +#endif + +#if GR_TEST_UTILS +#include "include/core/SkColorSpace.h" +#include "include/core/SkSurfaceProps.h" +#include "include/private/base/SkTo.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/base/SkRandom.h" +#include "src/gpu/ganesh/GrTestUtils.h" +#else +class SkSurfaceProps; +#endif + +#if defined(SK_ENABLE_SKSL) +#include "src/core/SkVM.h" +#endif + +class SkTable_ColorFilter final : public SkColorFilterBase { +public: + SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[], + const uint8_t tableG[], const uint8_t tableB[]) { + fBitmap.allocPixels(SkImageInfo::MakeA8(256, 4)); + uint8_t *a = fBitmap.getAddr8(0,0), + *r = fBitmap.getAddr8(0,1), + *g = fBitmap.getAddr8(0,2), + *b = fBitmap.getAddr8(0,3); + for (int i = 0; i < 256; i++) { + a[i] = tableA ? tableA[i] : i; + r[i] = tableR ? tableR[i] : i; + g[i] = tableG ? tableG[i] : i; + b[i] = tableB ? tableB[i] : i; + } + fBitmap.setImmutable(); + } + +#if defined(SK_GANESH) + GrFPResult asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext*, const GrColorInfo&, + const SkSurfaceProps&) const override; +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + + bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override { + SkRasterPipeline* p = rec.fPipeline; + if (!shaderIsOpaque) { + p->append(SkRasterPipelineOp::unpremul); + } + + SkRasterPipeline_TablesCtx* tables = rec.fAlloc->make(); + tables->a = fBitmap.getAddr8(0, 0); + tables->r = fBitmap.getAddr8(0, 1); + tables->g = fBitmap.getAddr8(0, 2); + tables->b = fBitmap.getAddr8(0, 3); + p->append(SkRasterPipelineOp::byte_tables, tables); + + bool definitelyOpaque = shaderIsOpaque && tables->a[0xff] == 0xff; + if (!definitelyOpaque) { + p->append(SkRasterPipelineOp::premul); + } + return true; + } + + skvm::Color onProgram(skvm::Builder* p, skvm::Color c, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, SkArenaAlloc*) const override { + + auto apply_table_to_component = [&](skvm::F32 c, const uint8_t* bytePtr) -> skvm::F32 { + skvm::I32 index = to_unorm(8, clamp01(c)); + skvm::Uniform table = uniforms->pushPtr(bytePtr); + return from_unorm(8, gather8(table, index)); + }; + + c = unpremul(c); + c.a = apply_table_to_component(c.a, fBitmap.getAddr8(0,0)); + c.r = apply_table_to_component(c.r, fBitmap.getAddr8(0,1)); + c.g = apply_table_to_component(c.g, fBitmap.getAddr8(0,2)); + c.b = apply_table_to_component(c.b, fBitmap.getAddr8(0,3)); + return premul(c); + } + + void flatten(SkWriteBuffer& buffer) const override { + buffer.writeByteArray(fBitmap.getAddr8(0,0), 4*256); + } + +private: + friend void ::SkRegisterTableColorFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkTable_ColorFilter) + + SkBitmap fBitmap; +}; + +sk_sp SkTable_ColorFilter::CreateProc(SkReadBuffer& buffer) { + uint8_t argb[4*256]; + if (buffer.readByteArray(argb, sizeof(argb))) { + return SkColorFilters::TableARGB(argb+0*256, argb+1*256, argb+2*256, argb+3*256); + } + return nullptr; +} + +#if defined(SK_GANESH) + +class ColorTableEffect : public GrFragmentProcessor { +public: + static std::unique_ptr Make(std::unique_ptr inputFP, + GrRecordingContext* context, + const SkBitmap& bitmap); + + ~ColorTableEffect() override {} + + const char* name() const override { return "ColorTableEffect"; } + + std::unique_ptr clone() const override { + return std::unique_ptr(new ColorTableEffect(*this)); + } + + inline static constexpr int kTexEffectFPIndex = 0; + inline static constexpr int kInputFPIndex = 1; + +private: + std::unique_ptr onMakeProgramImpl() const override; + + void onAddToKey(const GrShaderCaps&, skgpu::KeyBuilder*) const override {} + + bool onIsEqual(const GrFragmentProcessor&) const override { return true; } + + ColorTableEffect(std::unique_ptr inputFP, GrSurfaceProxyView view); + + explicit ColorTableEffect(const ColorTableEffect& that); + + GR_DECLARE_FRAGMENT_PROCESSOR_TEST + + using INHERITED = GrFragmentProcessor; +}; + +ColorTableEffect::ColorTableEffect(std::unique_ptr inputFP, + GrSurfaceProxyView view) + // Not bothering with table-specific optimizations. + : INHERITED(kColorTableEffect_ClassID, kNone_OptimizationFlags) { + this->registerChild(GrTextureEffect::Make(std::move(view), kUnknown_SkAlphaType), + SkSL::SampleUsage::Explicit()); + this->registerChild(std::move(inputFP)); +} + +ColorTableEffect::ColorTableEffect(const ColorTableEffect& that) + : INHERITED(that) {} + +std::unique_ptr ColorTableEffect::onMakeProgramImpl() const { + class Impl : public ProgramImpl { + public: + void emitCode(EmitArgs& args) override { + GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; + SkString inputColor = this->invokeChild(kInputFPIndex, args); + SkString a = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.a, 0.5)"); + SkString r = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.r, 1.5)"); + SkString g = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.g, 2.5)"); + SkString b = this->invokeChild(kTexEffectFPIndex, args, "half2(coord.b, 3.5)"); + fragBuilder->codeAppendf( + "half4 coord = 255 * unpremul(%s) + 0.5;\n" + "half4 color = half4(%s.a, %s.a, %s.a, 1);\n" + "return color * %s.a;\n", + inputColor.c_str(), r.c_str(), g.c_str(), b.c_str(), a.c_str()); + } + }; + + return std::make_unique(); +} + +std::unique_ptr ColorTableEffect::Make( + std::unique_ptr inputFP, + GrRecordingContext* context, const SkBitmap& bitmap) { + SkASSERT(kPremul_SkAlphaType == bitmap.alphaType()); + SkASSERT(bitmap.isImmutable()); + + auto view = std::get<0>(GrMakeCachedBitmapProxyView(context, + bitmap, + /*label=*/"MakeColorTableEffect", + GrMipmapped::kNo)); + if (!view) { + return nullptr; + } + + return std::unique_ptr(new ColorTableEffect(std::move(inputFP), + std::move(view))); +} + +/////////////////////////////////////////////////////////////////////////////// + +GR_DEFINE_FRAGMENT_PROCESSOR_TEST(ColorTableEffect) + +#if GR_TEST_UTILS + + +std::unique_ptr ColorTableEffect::TestCreate(GrProcessorTestData* d) { + int flags = 0; + uint8_t luts[256][4]; + do { + for (int i = 0; i < 4; ++i) { + flags |= d->fRandom->nextBool() ? (1 << i): 0; + } + } while (!flags); + for (int i = 0; i < 4; ++i) { + if (flags & (1 << i)) { + for (int j = 0; j < 256; ++j) { + luts[j][i] = SkToU8(d->fRandom->nextBits(8)); + } + } + } + auto filter(SkColorFilters::TableARGB( + (flags & (1 << 0)) ? luts[0] : nullptr, + (flags & (1 << 1)) ? luts[1] : nullptr, + (flags & (1 << 2)) ? luts[2] : nullptr, + (flags & (1 << 3)) ? luts[3] : nullptr + )); + sk_sp colorSpace = GrTest::TestColorSpace(d->fRandom); + SkSurfaceProps props; // default props for testing + auto [success, fp] = as_CFB(filter)->asFragmentProcessor( + d->inputFP(), d->context(), + GrColorInfo(GrColorType::kRGBA_8888, kUnknown_SkAlphaType, std::move(colorSpace)), + props); + SkASSERT(success); + return std::move(fp); +} +#endif + +GrFPResult SkTable_ColorFilter::asFragmentProcessor(std::unique_ptr inputFP, + GrRecordingContext* context, + const GrColorInfo&, + const SkSurfaceProps&) const { + auto cte = ColorTableEffect::Make(std::move(inputFP), context, fBitmap); + return cte ? GrFPSuccess(std::move(cte)) : GrFPFailure(nullptr); +} + +#endif // defined(SK_GANESH) + +#if defined(SK_GRAPHITE) + +void SkTable_ColorFilter::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + sk_sp image = RecorderPriv::CreateCachedImage(keyContext.recorder(), fBitmap); + if (!image) { + SKGPU_LOG_W("Couldn't create TableColorFilter's table"); + + // Return the input color as-is. + PassthroughShaderBlock::BeginBlock(keyContext, builder, gatherer); + builder->endBlock(); + return; + } + + TableColorFilterBlock::TableColorFilterData data; + + auto [view, _] = as_IB(image)->asView(keyContext.recorder(), skgpu::Mipmapped::kNo); + data.fTextureProxy = view.refProxy(); + + TableColorFilterBlock::BeginBlock(keyContext, builder, gatherer, data); + builder->endBlock(); +} + +#endif + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkColorFilters::Table(const uint8_t table[256]) { + return sk_make_sp(table, table, table, table); +} + +sk_sp SkColorFilters::TableARGB(const uint8_t tableA[256], + const uint8_t tableR[256], + const uint8_t tableG[256], + const uint8_t tableB[256]) { + if (!tableA && !tableR && !tableG && !tableB) { + return nullptr; + } + + return sk_make_sp(tableA, tableR, tableG, tableB); +} + +void SkRegisterTableColorFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkTable_ColorFilter); +} diff --git a/gfx/skia/skia/src/effects/SkTableMaskFilter.cpp b/gfx/skia/skia/src/effects/SkTableMaskFilter.cpp new file mode 100644 index 0000000000..36f5dac777 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkTableMaskFilter.cpp @@ -0,0 +1,186 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkTableMaskFilter.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkMaskFilter.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkAlign.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTPin.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include + +class SkMatrix; + +class SkTableMaskFilterImpl : public SkMaskFilterBase { +public: + explicit SkTableMaskFilterImpl(const uint8_t table[256]); + + SkMask::Format getFormat() const override; + bool filterMask(SkMask*, const SkMask&, const SkMatrix&, SkIPoint*) const override; + +protected: + ~SkTableMaskFilterImpl() override; + + void flatten(SkWriteBuffer&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkTableMaskFilterImpl) + + SkTableMaskFilterImpl(); + + uint8_t fTable[256]; + + using INHERITED = SkMaskFilter; +}; + +SkTableMaskFilterImpl::SkTableMaskFilterImpl() { + for (int i = 0; i < 256; i++) { + fTable[i] = i; + } +} + +SkTableMaskFilterImpl::SkTableMaskFilterImpl(const uint8_t table[256]) { + memcpy(fTable, table, sizeof(fTable)); +} + +SkTableMaskFilterImpl::~SkTableMaskFilterImpl() {} + +bool SkTableMaskFilterImpl::filterMask(SkMask* dst, const SkMask& src, + const SkMatrix&, SkIPoint* margin) const { + if (src.fFormat != SkMask::kA8_Format) { + return false; + } + + dst->fBounds = src.fBounds; + dst->fRowBytes = SkAlign4(dst->fBounds.width()); + dst->fFormat = SkMask::kA8_Format; + dst->fImage = nullptr; + + if (src.fImage) { + dst->fImage = SkMask::AllocImage(dst->computeImageSize()); + + const uint8_t* srcP = src.fImage; + uint8_t* dstP = dst->fImage; + const uint8_t* table = fTable; + int dstWidth = dst->fBounds.width(); + int extraZeros = dst->fRowBytes - dstWidth; + + for (int y = dst->fBounds.height() - 1; y >= 0; --y) { + for (int x = dstWidth - 1; x >= 0; --x) { + dstP[x] = table[srcP[x]]; + } + srcP += src.fRowBytes; + // we can't just inc dstP by rowbytes, because if it has any + // padding between its width and its rowbytes, we need to zero those + // so that the bitters can read those safely if that is faster for + // them + dstP += dstWidth; + for (int i = extraZeros - 1; i >= 0; --i) { + *dstP++ = 0; + } + } + } + + if (margin) { + margin->set(0, 0); + } + return true; +} + +SkMask::Format SkTableMaskFilterImpl::getFormat() const { + return SkMask::kA8_Format; +} + +void SkTableMaskFilterImpl::flatten(SkWriteBuffer& wb) const { + wb.writeByteArray(fTable, 256); +} + +sk_sp SkTableMaskFilterImpl::CreateProc(SkReadBuffer& buffer) { + uint8_t table[256]; + if (!buffer.readByteArray(table, 256)) { + return nullptr; + } + return sk_sp(SkTableMaskFilter::Create(table)); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkMaskFilter* SkTableMaskFilter::Create(const uint8_t table[256]) { + return new SkTableMaskFilterImpl(table); +} + +SkMaskFilter* SkTableMaskFilter::CreateGamma(SkScalar gamma) { + uint8_t table[256]; + MakeGammaTable(table, gamma); + return new SkTableMaskFilterImpl(table); +} + +SkMaskFilter* SkTableMaskFilter::CreateClip(uint8_t min, uint8_t max) { + uint8_t table[256]; + MakeClipTable(table, min, max); + return new SkTableMaskFilterImpl(table); +} + +void SkTableMaskFilter::MakeGammaTable(uint8_t table[256], SkScalar gamma) { + const float dx = 1 / 255.0f; + const float g = SkScalarToFloat(gamma); + + float x = 0; + for (int i = 0; i < 256; i++) { + // float ee = powf(x, g) * 255; + table[i] = SkTPin(sk_float_round2int(powf(x, g) * 255), 0, 255); + x += dx; + } +} + +void SkTableMaskFilter::MakeClipTable(uint8_t table[256], uint8_t min, + uint8_t max) { + if (0 == max) { + max = 1; + } + if (min >= max) { + min = max - 1; + } + SkASSERT(min < max); + + SkFixed scale = (1 << 16) * 255 / (max - min); + memset(table, 0, min + 1); + for (int i = min + 1; i < max; i++) { + int value = SkFixedRoundToInt(scale * (i - min)); + SkASSERT(value <= 255); + table[i] = value; + } + memset(table + max, 255, 256 - max); + +#if 0 + int j; + for (j = 0; j < 256; j++) { + if (table[j]) { + break; + } + } + SkDebugf("%d %d start [%d]", min, max, j); + for (; j < 256; j++) { + SkDebugf(" %d", table[j]); + } + SkDebugf("\n\n"); +#endif +} diff --git a/gfx/skia/skia/src/effects/SkTrimPE.h b/gfx/skia/skia/src/effects/SkTrimPE.h new file mode 100644 index 0000000000..4aa9420b99 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkTrimPE.h @@ -0,0 +1,39 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTrimImpl_DEFINED +#define SkTrimImpl_DEFINED + +#include "include/effects/SkTrimPathEffect.h" +#include "src/core/SkPathEffectBase.h" + +class SkTrimPE : public SkPathEffectBase { +public: + SkTrimPE(SkScalar startT, SkScalar stopT, SkTrimPathEffect::Mode); + +protected: + void flatten(SkWriteBuffer&) const override; + bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const override; + +private: + SK_FLATTENABLE_HOOKS(SkTrimPE) + + bool computeFastBounds(SkRect* bounds) const override { + // Trimming a path returns a subset of the input path so just return true and leave bounds + // unmodified + return true; + } + + const SkScalar fStartT, + fStopT; + const SkTrimPathEffect::Mode fMode; + + using INHERITED = SkPathEffectBase; +}; + +#endif diff --git a/gfx/skia/skia/src/effects/SkTrimPathEffect.cpp b/gfx/skia/skia/src/effects/SkTrimPathEffect.cpp new file mode 100644 index 0000000000..abd25224c8 --- /dev/null +++ b/gfx/skia/skia/src/effects/SkTrimPathEffect.cpp @@ -0,0 +1,149 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkTrimPathEffect.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPathMeasure.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTPin.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/effects/SkTrimPE.h" + +#include +#include + +class SkMatrix; +class SkStrokeRec; +struct SkRect; + +namespace { + +// Returns the number of contours iterated to satisfy the request. +static size_t add_segments(const SkPath& src, SkScalar start, SkScalar stop, SkPath* dst, + bool requires_moveto = true) { + SkASSERT(start < stop); + + SkPathMeasure measure(src, false); + + SkScalar current_segment_offset = 0; + size_t contour_count = 1; + + do { + const auto next_offset = current_segment_offset + measure.getLength(); + + if (start < next_offset) { + measure.getSegment(start - current_segment_offset, + stop - current_segment_offset, + dst, requires_moveto); + + if (stop <= next_offset) + break; + } + + contour_count++; + current_segment_offset = next_offset; + } while (measure.nextContour()); + + return contour_count; +} + +} // namespace + +SkTrimPE::SkTrimPE(SkScalar startT, SkScalar stopT, SkTrimPathEffect::Mode mode) + : fStartT(startT), fStopT(stopT), fMode(mode) {} + +bool SkTrimPE::onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*, + const SkMatrix&) const { + if (fStartT >= fStopT) { + SkASSERT(fMode == SkTrimPathEffect::Mode::kNormal); + return true; + } + + // First pass: compute the total len. + SkScalar len = 0; + SkPathMeasure meas(src, false); + do { + len += meas.getLength(); + } while (meas.nextContour()); + + const auto arcStart = len * fStartT, + arcStop = len * fStopT; + + // Second pass: actually add segments. + if (fMode == SkTrimPathEffect::Mode::kNormal) { + // Normal mode -> one span. + if (arcStart < arcStop) { + add_segments(src, arcStart, arcStop, dst); + } + } else { + // Inverted mode -> one logical span which wraps around at the end -> two actual spans. + // In order to preserve closed path continuity: + // + // 1) add the second/tail span first + // + // 2) skip the head span move-to for single-closed-contour paths + + bool requires_moveto = true; + if (arcStop < len) { + // since we're adding the "tail" first, this is the total number of contours + const auto contour_count = add_segments(src, arcStop, len, dst); + + // if the path consists of a single closed contour, we don't want to disconnect + // the two parts with a moveto. + if (contour_count == 1 && src.isLastContourClosed()) { + requires_moveto = false; + } + } + if (0 < arcStart) { + add_segments(src, 0, arcStart, dst, requires_moveto); + } + } + + return true; +} + +void SkTrimPE::flatten(SkWriteBuffer& buffer) const { + buffer.writeScalar(fStartT); + buffer.writeScalar(fStopT); + buffer.writeUInt(static_cast(fMode)); +} + +sk_sp SkTrimPE::CreateProc(SkReadBuffer& buffer) { + const auto start = buffer.readScalar(), + stop = buffer.readScalar(); + const auto mode = buffer.readUInt(); + + return SkTrimPathEffect::Make(start, stop, + (mode & 1) ? SkTrimPathEffect::Mode::kInverted : SkTrimPathEffect::Mode::kNormal); +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkTrimPathEffect::Make(SkScalar startT, SkScalar stopT, Mode mode) { + if (!SkScalarsAreFinite(startT, stopT)) { + return nullptr; + } + + if (startT <= 0 && stopT >= 1 && mode == Mode::kNormal) { + return nullptr; + } + + startT = SkTPin(startT, 0.f, 1.f); + stopT = SkTPin(stopT, 0.f, 1.f); + + if (startT >= stopT && mode == Mode::kInverted) { + return nullptr; + } + + return sk_sp(new SkTrimPE(startT, stopT, mode)); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkAlphaThresholdImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkAlphaThresholdImageFilter.cpp new file mode 100644 index 0000000000..f6dd4814e8 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkAlphaThresholdImageFilter.cpp @@ -0,0 +1,334 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkRegion.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkCPUTypes.h" +#include "include/private/base/SkTPin.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrPaint.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SurfaceDrawContext.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" + +class GrRecordingContext; +class SkSurfaceProps; +enum GrSurfaceOrigin : int; +namespace skgpu { enum class Protected : bool; } + +#endif // defined(SK_GANESH) + +namespace { + +class SkAlphaThresholdImageFilter final : public SkImageFilter_Base { +public: + SkAlphaThresholdImageFilter(const SkRegion& region, SkScalar innerThreshold, + SkScalar outerThreshold, sk_sp input, + const SkRect* cropRect = nullptr) + : INHERITED(&input, 1, cropRect) + , fRegion(region) + , fInnerThreshold(innerThreshold) + , fOuterThreshold(outerThreshold) {} + +protected: + void flatten(SkWriteBuffer&) const override; + + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + +#if defined(SK_GANESH) + GrSurfaceProxyView createMaskTexture(GrRecordingContext*, + const SkMatrix&, + const SkIRect& bounds, + const SkSurfaceProps&) const; +#endif + +private: + friend void ::SkRegisterAlphaThresholdImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkAlphaThresholdImageFilter) + + SkRegion fRegion; + SkScalar fInnerThreshold; + SkScalar fOuterThreshold; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::AlphaThreshold( + const SkRegion& region, SkScalar innerMin, SkScalar outerMax, sk_sp input, + const CropRect& cropRect) { + innerMin = SkTPin(innerMin, 0.f, 1.f); + outerMax = SkTPin(outerMax, 0.f, 1.f); + if (!SkScalarIsFinite(innerMin) || !SkScalarIsFinite(outerMax)) { + return nullptr; + } + return sk_sp(new SkAlphaThresholdImageFilter( + region, innerMin, outerMax, std::move(input), cropRect)); +} + +void SkRegisterAlphaThresholdImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkAlphaThresholdImageFilter); + SkFlattenable::Register("SkAlphaThresholdFilterImpl", SkAlphaThresholdImageFilter::CreateProc); +} + +sk_sp SkAlphaThresholdImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkScalar inner = buffer.readScalar(); + SkScalar outer = buffer.readScalar(); + SkRegion rgn; + buffer.readRegion(&rgn); + return SkImageFilters::AlphaThreshold(rgn, inner, outer, common.getInput(0), common.cropRect()); +} + +void SkAlphaThresholdImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeScalar(fInnerThreshold); + buffer.writeScalar(fOuterThreshold); + buffer.writeRegion(fRegion); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) +GrSurfaceProxyView SkAlphaThresholdImageFilter::createMaskTexture( + GrRecordingContext* rContext, + const SkMatrix& inMatrix, + const SkIRect& bounds, + const SkSurfaceProps& surfaceProps) const { + auto sdc = skgpu::ganesh::SurfaceDrawContext::MakeWithFallback(rContext, + GrColorType::kAlpha_8, + nullptr, + SkBackingFit::kApprox, + bounds.size(), + surfaceProps); + if (!sdc) { + return {}; + } + + SkRegion::Iterator iter(fRegion); + sdc->clear(SK_PMColor4fTRANSPARENT); + + while (!iter.done()) { + GrPaint paint; + paint.setPorterDuffXPFactory(SkBlendMode::kSrc); + + SkRect rect = SkRect::Make(iter.rect()); + + sdc->drawRect(nullptr, std::move(paint), GrAA::kNo, inMatrix, rect); + + iter.next(); + } + + return sdc->readSurfaceView(); +} + +static std::unique_ptr make_alpha_threshold_fp( + std::unique_ptr inputFP, + std::unique_ptr maskFP, + float innerThreshold, + float outerThreshold) { + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform shader maskFP;" + "uniform shader inputFP;" + "uniform half innerThreshold;" + "uniform half outerThreshold;" + + "half4 main(float2 xy) {" + "half4 color = inputFP.eval(xy);" + "half4 mask_color = maskFP.eval(xy);" + "if (mask_color.a < 0.5) {" + "if (color.a > outerThreshold) {" + "half scale = outerThreshold / color.a;" + "color.rgb *= scale;" + "color.a = outerThreshold;" + "}" + "} else if (color.a < innerThreshold) {" + "half scale = innerThreshold / max(0.001, color.a);" + "color.rgb *= scale;" + "color.a = innerThreshold;" + "}" + "return color;" + "}" + ); + + return GrSkSLFP::Make(effect, "AlphaThreshold", /*inputFP=*/nullptr, + (outerThreshold >= 1.0f) ? GrSkSLFP::OptFlags::kPreservesOpaqueInput + : GrSkSLFP::OptFlags::kNone, + "maskFP", GrSkSLFP::IgnoreOptFlags(std::move(maskFP)), + "inputFP", std::move(inputFP), + "innerThreshold", innerThreshold, + "outerThreshold", outerThreshold); +} +#endif // defined(SK_GANESH) + +sk_sp SkAlphaThresholdImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(), + input->width(), input->height()); + + SkIRect bounds; + if (!this->applyCropRect(ctx, inputBounds, &bounds)) { + return nullptr; + } + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + auto context = ctx.getContext(); + + GrSurfaceProxyView inputView = (input->view(context)); + SkASSERT(inputView.asTextureProxy()); + const skgpu::Protected isProtected = inputView.proxy()->isProtected(); + const GrSurfaceOrigin origin = inputView.origin(); + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + + bounds.offset(-inputOffset); + + SkMatrix matrix(ctx.ctm()); + matrix.postTranslate(SkIntToScalar(-offset->fX), SkIntToScalar(-offset->fY)); + + GrSurfaceProxyView maskView = this->createMaskTexture(context, matrix, bounds, + ctx.surfaceProps()); + if (!maskView) { + return nullptr; + } + auto maskFP = GrTextureEffect::Make(std::move(maskView), kPremul_SkAlphaType, + SkMatrix::Translate(-bounds.x(), -bounds.y())); + + auto textureFP = GrTextureEffect::Make( + std::move(inputView), input->alphaType(), + SkMatrix::Translate(input->subset().x(), input->subset().y())); + textureFP = GrColorSpaceXformEffect::Make(std::move(textureFP), + input->getColorSpace(), input->alphaType(), + ctx.colorSpace(), kPremul_SkAlphaType); + if (!textureFP) { + return nullptr; + } + + auto thresholdFP = make_alpha_threshold_fp( + std::move(textureFP), std::move(maskFP), fInnerThreshold, fOuterThreshold); + if (!thresholdFP) { + return nullptr; + } + + return DrawWithFP(context, std::move(thresholdFP), bounds, ctx.colorType(), + ctx.colorSpace(), ctx.surfaceProps(), origin, isProtected); + } +#endif + + SkBitmap inputBM; + + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if (inputBM.colorType() != kN32_SkColorType) { + return nullptr; + } + + if (!inputBM.getPixels() || inputBM.width() <= 0 || inputBM.height() <= 0) { + return nullptr; + } + + + SkMatrix localInverse; + if (!ctx.ctm().invert(&localInverse)) { + return nullptr; + } + + SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(), + kPremul_SkAlphaType); + + SkBitmap dst; + if (!dst.tryAllocPixels(info)) { + return nullptr; + } + + U8CPU innerThreshold = (U8CPU)(fInnerThreshold * 0xFF); + U8CPU outerThreshold = (U8CPU)(fOuterThreshold * 0xFF); + SkColor* dptr = dst.getAddr32(0, 0); + int dstWidth = dst.width(), dstHeight = dst.height(); + SkIPoint srcOffset = { bounds.fLeft - inputOffset.fX, bounds.fTop - inputOffset.fY }; + for (int y = 0; y < dstHeight; ++y) { + const SkColor* sptr = inputBM.getAddr32(srcOffset.fX, srcOffset.fY+y); + + for (int x = 0; x < dstWidth; ++x) { + const SkColor& source = sptr[x]; + SkColor outputColor(source); + SkPoint position; + localInverse.mapXY((SkScalar)x + bounds.fLeft, (SkScalar)y + bounds.fTop, &position); + if (fRegion.contains((int32_t)position.x(), (int32_t)position.y())) { + if (SkColorGetA(source) < innerThreshold) { + U8CPU alpha = SkColorGetA(source); + if (alpha == 0) { + alpha = 1; + } + float scale = (float)innerThreshold / alpha; + outputColor = SkColorSetARGB(innerThreshold, + (U8CPU)(SkColorGetR(source) * scale), + (U8CPU)(SkColorGetG(source) * scale), + (U8CPU)(SkColorGetB(source) * scale)); + } + } else { + if (SkColorGetA(source) > outerThreshold) { + float scale = (float)outerThreshold / SkColorGetA(source); + outputColor = SkColorSetARGB(outerThreshold, + (U8CPU)(SkColorGetR(source) * scale), + (U8CPU)(SkColorGetG(source) * scale), + (U8CPU)(SkColorGetB(source) * scale)); + } + } + dptr[y * dstWidth + x] = outputColor; + } + } + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()), + dst, ctx.surfaceProps()); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkArithmeticImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkArithmeticImageFilter.cpp new file mode 100644 index 0000000000..c7fcb0662b --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkArithmeticImageFilter.cpp @@ -0,0 +1,497 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkM44.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkRegion.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkColorData.h" +#include "src/base/SkVx.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSamplerState.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#endif + +namespace { + +class SkArithmeticImageFilter final : public SkImageFilter_Base { +public: + SkArithmeticImageFilter(float k1, float k2, float k3, float k4, bool enforcePMColor, + sk_sp inputs[2], const SkRect* cropRect) + : INHERITED(inputs, 2, cropRect) + , fK{k1, k2, k3, k4} + , fEnforcePMColor(enforcePMColor) {} + +protected: + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + + SkIRect onFilterBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + +#if defined(SK_GANESH) + sk_sp filterImageGPU(const Context& ctx, + sk_sp background, + const SkIPoint& backgroundOffset, + sk_sp foreground, + const SkIPoint& foregroundOffset, + const SkIRect& bounds) const; +#endif + + void flatten(SkWriteBuffer& buffer) const override; + + void drawForeground(SkCanvas* canvas, SkSpecialImage*, const SkIRect&) const; + +private: + friend void ::SkRegisterArithmeticImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkArithmeticImageFilter) + + bool onAffectsTransparentBlack() const override { return !SkScalarNearlyZero(fK[3]); } + + SkV4 fK; + bool fEnforcePMColor; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Arithmetic( + SkScalar k1, SkScalar k2, SkScalar k3, SkScalar k4, bool enforcePMColor, + sk_sp background, sk_sp foreground, + const CropRect& cropRect) { + if (!SkScalarIsFinite(k1) || !SkScalarIsFinite(k2) || !SkScalarIsFinite(k3) || + !SkScalarIsFinite(k4)) { + return nullptr; + } + + // are we nearly some other "std" mode? + int mode = -1; // illegal mode + if (SkScalarNearlyZero(k1) && SkScalarNearlyEqual(k2, SK_Scalar1) && SkScalarNearlyZero(k3) && + SkScalarNearlyZero(k4)) { + mode = (int)SkBlendMode::kSrc; + } else if (SkScalarNearlyZero(k1) && SkScalarNearlyZero(k2) && + SkScalarNearlyEqual(k3, SK_Scalar1) && SkScalarNearlyZero(k4)) { + mode = (int)SkBlendMode::kDst; + } else if (SkScalarNearlyZero(k1) && SkScalarNearlyZero(k2) && SkScalarNearlyZero(k3) && + SkScalarNearlyZero(k4)) { + mode = (int)SkBlendMode::kClear; + } + if (mode >= 0) { + return SkImageFilters::Blend((SkBlendMode)mode, std::move(background), + std::move(foreground), cropRect); + } + + sk_sp inputs[2] = {std::move(background), std::move(foreground)}; + return sk_sp( + new SkArithmeticImageFilter(k1, k2, k3, k4, enforcePMColor, inputs, cropRect)); +} + +void SkRegisterArithmeticImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkArithmeticImageFilter); + SkFlattenable::Register("ArithmeticImageFilterImpl", SkArithmeticImageFilter::CreateProc); +} + +sk_sp SkArithmeticImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2); + float k[4]; + for (int i = 0; i < 4; ++i) { + k[i] = buffer.readScalar(); + } + const bool enforcePMColor = buffer.readBool(); + if (!buffer.isValid()) { + return nullptr; + } + return SkImageFilters::Arithmetic(k[0], k[1], k[2], k[3], enforcePMColor, common.getInput(0), + common.getInput(1), common.cropRect()); +} + +void SkArithmeticImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + for (int i = 0; i < 4; ++i) { + buffer.writeScalar(fK[i]); + } + buffer.writeBool(fEnforcePMColor); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +template +void arith_span(const SkV4& k, SkPMColor dst[], const SkPMColor src[], int count) { + const skvx::float4 k1 = k[0] * (1/255.0f), + k2 = k[1], + k3 = k[2], + k4 = k[3] * 255.0f + 0.5f; + + for (int i = 0; i < count; i++) { + skvx::float4 s = skvx::cast(skvx::byte4::Load(src+i)), + d = skvx::cast(skvx::byte4::Load(dst+i)), + r = pin(k1*s*d + k2*s + k3*d + k4, skvx::float4(0.f), skvx::float4(255.f)); + if (EnforcePMColor) { + auto a = skvx::shuffle<3,3,3,3>(r); + r = min(a, r); + } + skvx::cast(r).store(dst+i); + } +} + +// apply mode to src==transparent (0) +template void arith_transparent(const SkV4& k, SkPMColor dst[], int count) { + const skvx::float4 k3 = k[2], + k4 = k[3] * 255.0f + 0.5f; + + for (int i = 0; i < count; i++) { + skvx::float4 d = skvx::cast(skvx::byte4::Load(dst+i)), + r = pin(k3*d + k4, skvx::float4(0.f), skvx::float4(255.f)); + if (EnforcePMColor) { + auto a = skvx::shuffle<3,3,3,3>(r); + r = min(a, r); + } + skvx::cast(r).store(dst+i); + } +} + +static bool intersect(SkPixmap* dst, SkPixmap* src, int srcDx, int srcDy) { + SkIRect dstR = SkIRect::MakeWH(dst->width(), dst->height()); + SkIRect srcR = SkIRect::MakeXYWH(srcDx, srcDy, src->width(), src->height()); + SkIRect sect; + if (!sect.intersect(dstR, srcR)) { + return false; + } + *dst = SkPixmap(dst->info().makeDimensions(sect.size()), + dst->addr(sect.fLeft, sect.fTop), + dst->rowBytes()); + *src = SkPixmap(src->info().makeDimensions(sect.size()), + src->addr(std::max(0, -srcDx), std::max(0, -srcDy)), + src->rowBytes()); + return true; +} + +sk_sp SkArithmeticImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint backgroundOffset = SkIPoint::Make(0, 0); + sk_sp background(this->filterInput(0, ctx, &backgroundOffset)); + + SkIPoint foregroundOffset = SkIPoint::Make(0, 0); + sk_sp foreground(this->filterInput(1, ctx, &foregroundOffset)); + + SkIRect foregroundBounds = SkIRect::MakeEmpty(); + if (foreground) { + foregroundBounds = SkIRect::MakeXYWH(foregroundOffset.x(), foregroundOffset.y(), + foreground->width(), foreground->height()); + } + + SkIRect srcBounds = SkIRect::MakeEmpty(); + if (background) { + srcBounds = SkIRect::MakeXYWH(backgroundOffset.x(), backgroundOffset.y(), + background->width(), background->height()); + } + + srcBounds.join(foregroundBounds); + if (srcBounds.isEmpty()) { + return nullptr; + } + + SkIRect bounds; + if (!this->applyCropRect(ctx, srcBounds, &bounds)) { + return nullptr; + } + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + return this->filterImageGPU(ctx, background, backgroundOffset, foreground, + foregroundOffset, bounds); + } +#endif + + sk_sp surf(ctx.makeSurface(bounds.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + canvas->clear(0x0); // can't count on background to fully clear the background + canvas->translate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); + + if (background) { + SkPaint paint; + paint.setBlendMode(SkBlendMode::kSrc); + background->draw(canvas, SkIntToScalar(backgroundOffset.fX), + SkIntToScalar(backgroundOffset.fY), SkSamplingOptions(), &paint); + } + + this->drawForeground(canvas, foreground.get(), foregroundBounds); + + return surf->makeImageSnapshot(); +} + +SkIRect SkArithmeticImageFilter::onFilterBounds(const SkIRect& src, + const SkMatrix& ctm, + MapDirection dir, + const SkIRect* inputRect) const { + if (kReverse_MapDirection == dir) { + return INHERITED::onFilterBounds(src, ctm, dir, inputRect); + } + + SkASSERT(2 == this->countInputs()); + + // result(i1,i2) = k1*i1*i2 + k2*i1 + k3*i2 + k4 + // Note that background (getInput(0)) is i2, and foreground (getInput(1)) is i1. + auto i2 = this->getInput(0) ? this->getInput(0)->filterBounds(src, ctm, dir, nullptr) : src; + auto i1 = this->getInput(1) ? this->getInput(1)->filterBounds(src, ctm, dir, nullptr) : src; + + // Arithmetic with non-zero k4 may influence the complete filter primitive + // region. [k4 > 0 => result(0,0) = k4 => result(i1,i2) >= k4] + if (!SkScalarNearlyZero(fK[3])) { + i1.join(i2); + return i1; + } + + // If both K2 or K3 are non-zero, both i1 and i2 appear. + if (!SkScalarNearlyZero(fK[1]) && !SkScalarNearlyZero(fK[2])) { + i1.join(i2); + return i1; + } + + // If k2 is non-zero, output can be produced whenever i1 is non-transparent. + // [k3 = k4 = 0 => result(i1,i2) = k1*i1*i2 + k2*i1 = (k1*i2 + k2)*i1] + if (!SkScalarNearlyZero(fK[1])) { + return i1; + } + + // If k3 is non-zero, output can be produced whenever i2 is non-transparent. + // [k2 = k4 = 0 => result(i1,i2) = k1*i1*i2 + k3*i2 = (k1*i1 + k3)*i2] + if (!SkScalarNearlyZero(fK[2])) { + return i2; + } + + // If just k1 is non-zero, output will only be produce where both inputs + // are non-transparent. Use intersection. + // [k1 > 0 and k2 = k3 = k4 = 0 => result(i1,i2) = k1*i1*i2] + if (!SkScalarNearlyZero(fK[0])) { + if (!i1.intersect(i2)) { + return SkIRect::MakeEmpty(); + } + return i1; + } + + // [k1 = k2 = k3 = k4 = 0 => result(i1,i2) = 0] + return SkIRect::MakeEmpty(); +} + +#if defined(SK_GANESH) + +std::unique_ptr make_arithmetic_fp( + std::unique_ptr srcFP, + std::unique_ptr dstFP, + const SkV4& k, + bool enforcePMColor) { + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform shader srcFP;" + "uniform shader dstFP;" + "uniform half4 k;" + "uniform half pmClamp;" + "half4 main(float2 xy) {" + "half4 src = srcFP.eval(xy);" + "half4 dst = dstFP.eval(xy);" + "half4 color = saturate(k.x * src * dst +" + "k.y * src +" + "k.z * dst +" + "k.w);" + "color.rgb = min(color.rgb, max(color.a, pmClamp));" + "return color;" + "}" + ); + return GrSkSLFP::Make(effect, "arithmetic_fp", /*inputFP=*/nullptr, GrSkSLFP::OptFlags::kNone, + "srcFP", std::move(srcFP), + "dstFP", std::move(dstFP), + "k", k, + "pmClamp", enforcePMColor ? 0.0f : 1.0f); +} + +sk_sp SkArithmeticImageFilter::filterImageGPU( + const Context& ctx, + sk_sp background, + const SkIPoint& backgroundOffset, + sk_sp foreground, + const SkIPoint& foregroundOffset, + const SkIRect& bounds) const { + SkASSERT(ctx.gpuBacked()); + + auto rContext = ctx.getContext(); + + GrSurfaceProxyView backgroundView, foregroundView; + + GrProtected isProtected = GrProtected::kNo; + if (background) { + backgroundView = background->view(rContext); + SkASSERT(backgroundView.proxy()); + isProtected = backgroundView.proxy()->isProtected(); + } + + if (foreground) { + foregroundView = foreground->view(rContext); + SkASSERT(foregroundView.proxy()); + isProtected = foregroundView.proxy()->isProtected(); + } + + std::unique_ptr fp; + const auto& caps = *ctx.getContext()->priv().caps(); + GrSamplerState sampler(GrSamplerState::WrapMode::kClampToBorder, + GrSamplerState::Filter::kNearest); + + if (background) { + SkRect bgSubset = SkRect::Make(background->subset()); + SkMatrix backgroundMatrix = SkMatrix::Translate( + SkIntToScalar(bgSubset.left() - backgroundOffset.fX), + SkIntToScalar(bgSubset.top() - backgroundOffset.fY)); + fp = GrTextureEffect::MakeSubset(std::move(backgroundView), + background->alphaType(), + backgroundMatrix, + sampler, + bgSubset, + caps); + fp = GrColorSpaceXformEffect::Make(std::move(fp), + background->getColorSpace(), + background->alphaType(), + ctx.colorSpace(), + kPremul_SkAlphaType); + } else { + fp = GrFragmentProcessor::MakeColor(SK_PMColor4fTRANSPARENT); + } + + if (foreground) { + SkRect fgSubset = SkRect::Make(foreground->subset()); + SkMatrix foregroundMatrix = SkMatrix::Translate( + SkIntToScalar(fgSubset.left() - foregroundOffset.fX), + SkIntToScalar(fgSubset.top() - foregroundOffset.fY)); + auto fgFP = GrTextureEffect::MakeSubset(std::move(foregroundView), + foreground->alphaType(), + foregroundMatrix, + sampler, + fgSubset, + caps); + fgFP = GrColorSpaceXformEffect::Make(std::move(fgFP), + foreground->getColorSpace(), + foreground->alphaType(), + ctx.colorSpace(), + kPremul_SkAlphaType); + fp = make_arithmetic_fp(std::move(fgFP), std::move(fp), fK, fEnforcePMColor); + } + + GrImageInfo info(ctx.grColorType(), kPremul_SkAlphaType, ctx.refColorSpace(), bounds.size()); + auto sfc = rContext->priv().makeSFC(info, + "ArithmeticImageFilter_FilterImageGPU", + SkBackingFit::kApprox, + 1, + GrMipmapped::kNo, + isProtected, + kBottomLeft_GrSurfaceOrigin); + if (!sfc) { + return nullptr; + } + + sfc->fillRectToRectWithFP(bounds, SkIRect::MakeSize(bounds.size()), std::move(fp)); + + return SkSpecialImage::MakeDeferredFromGpu(rContext, + SkIRect::MakeWH(bounds.width(), bounds.height()), + kNeedNewImageUniqueID_SpecialImage, + sfc->readSurfaceView(), + sfc->colorInfo(), + ctx.surfaceProps()); +} +#endif + +void SkArithmeticImageFilter::drawForeground(SkCanvas* canvas, SkSpecialImage* img, + const SkIRect& fgBounds) const { + SkPixmap dst; + if (!canvas->peekPixels(&dst)) { + return; + } + + const SkMatrix& ctm = canvas->getTotalMatrix(); + SkASSERT(ctm.getType() <= SkMatrix::kTranslate_Mask); + const int dx = SkScalarRoundToInt(ctm.getTranslateX()); + const int dy = SkScalarRoundToInt(ctm.getTranslateY()); + // be sure to perform this offset using SkIRect, since it saturates to avoid overflows + const SkIRect fgoffset = fgBounds.makeOffset(dx, dy); + + if (img) { + SkBitmap srcBM; + SkPixmap src; + if (!img->getROPixels(&srcBM)) { + return; + } + if (!srcBM.peekPixels(&src)) { + return; + } + + auto proc = fEnforcePMColor ? arith_span : arith_span; + SkPixmap tmpDst = dst; + if (intersect(&tmpDst, &src, fgoffset.fLeft, fgoffset.fTop)) { + for (int y = 0; y < tmpDst.height(); ++y) { + proc(fK, tmpDst.writable_addr32(0, y), src.addr32(0, y), tmpDst.width()); + } + } + } + + // Now apply the mode with transparent-color to the outside of the fg image + SkRegion outside(SkIRect::MakeWH(dst.width(), dst.height())); + outside.op(fgoffset, SkRegion::kDifference_Op); + auto proc = fEnforcePMColor ? arith_transparent : arith_transparent; + for (SkRegion::Iterator iter(outside); !iter.done(); iter.next()) { + const SkIRect r = iter.rect(); + for (int y = r.fTop; y < r.fBottom; ++y) { + proc(fK, dst.writable_addr32(r.fLeft, y), r.width()); + } + } +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkBlendImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkBlendImageFilter.cpp new file mode 100644 index 0000000000..23080e26a0 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkBlendImageFilter.cpp @@ -0,0 +1,351 @@ +/* + * Copyright 2013 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkBlender.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkClipOp.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/private/SkColorData.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSamplerState.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#endif + +namespace { + +class SkBlendImageFilter : public SkImageFilter_Base { +public: + SkBlendImageFilter(sk_sp blender, sk_sp inputs[2], + const SkRect* cropRect) + : INHERITED(inputs, 2, cropRect) + , fBlender(std::move(blender)) + { + SkASSERT(fBlender); + } + +protected: + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + + SkIRect onFilterBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + +#if defined(SK_GANESH) + sk_sp filterImageGPU(const Context& ctx, + sk_sp background, + const SkIPoint& backgroundOffset, + sk_sp foreground, + const SkIPoint& foregroundOffset, + const SkIRect& bounds) const; +#endif + + void flatten(SkWriteBuffer&) const override; + + void drawForeground(SkCanvas* canvas, SkSpecialImage*, const SkIRect&) const; + +private: + friend void ::SkRegisterBlendImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkBlendImageFilter) + + sk_sp fBlender; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Blend(SkBlendMode mode, + sk_sp background, + sk_sp foreground, + const CropRect& cropRect) { + sk_sp inputs[2] = { std::move(background), std::move(foreground) }; + return sk_sp(new SkBlendImageFilter(SkBlender::Mode(mode), inputs, cropRect)); +} + +sk_sp SkImageFilters::Blend(sk_sp blender, + sk_sp background, + sk_sp foreground, + const CropRect& cropRect) { + if (!blender) { + blender = SkBlender::Mode(SkBlendMode::kSrcOver); + } + sk_sp inputs[2] = { std::move(background), std::move(foreground) }; + return sk_sp(new SkBlendImageFilter(blender, inputs, cropRect)); +} + +void SkRegisterBlendImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkBlendImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkXfermodeImageFilter_Base", SkBlendImageFilter::CreateProc); + SkFlattenable::Register("SkXfermodeImageFilterImpl", SkBlendImageFilter::CreateProc); +} + +sk_sp SkBlendImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2); + + sk_sp blender; + const uint32_t mode = buffer.read32(); + if (mode == kCustom_SkBlendMode) { + blender = buffer.readBlender(); + } else { + if (mode > (unsigned)SkBlendMode::kLastMode) { + buffer.validate(false); + return nullptr; + } + blender = SkBlender::Mode((SkBlendMode)mode); + } + return SkImageFilters::Blend(std::move(blender), common.getInput(0), common.getInput(1), + common.cropRect()); +} + +void SkBlendImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + if (auto bm = as_BB(fBlender)->asBlendMode()) { + buffer.write32((unsigned)bm.value()); + } else { + buffer.write32(kCustom_SkBlendMode); + buffer.writeFlattenable(fBlender.get()); + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkBlendImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint backgroundOffset = SkIPoint::Make(0, 0); + sk_sp background(this->filterInput(0, ctx, &backgroundOffset)); + + SkIPoint foregroundOffset = SkIPoint::Make(0, 0); + sk_sp foreground(this->filterInput(1, ctx, &foregroundOffset)); + + SkIRect foregroundBounds = SkIRect::MakeEmpty(); + if (foreground) { + foregroundBounds = SkIRect::MakeXYWH(foregroundOffset.x(), foregroundOffset.y(), + foreground->width(), foreground->height()); + } + + SkIRect srcBounds = SkIRect::MakeEmpty(); + if (background) { + srcBounds = SkIRect::MakeXYWH(backgroundOffset.x(), backgroundOffset.y(), + background->width(), background->height()); + } + + srcBounds.join(foregroundBounds); + if (srcBounds.isEmpty()) { + return nullptr; + } + + SkIRect bounds; + if (!this->applyCropRect(ctx, srcBounds, &bounds)) { + return nullptr; + } + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + return this->filterImageGPU(ctx, background, backgroundOffset, + foreground, foregroundOffset, bounds); + } +#endif + + sk_sp surf(ctx.makeSurface(bounds.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + canvas->clear(0x0); // can't count on background to fully clear the background + canvas->translate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); + + if (background) { + SkPaint paint; + paint.setBlendMode(SkBlendMode::kSrc); + background->draw(canvas, + SkIntToScalar(backgroundOffset.fX), SkIntToScalar(backgroundOffset.fY), + SkSamplingOptions(), &paint); + } + + this->drawForeground(canvas, foreground.get(), foregroundBounds); + + return surf->makeImageSnapshot(); +} + +SkIRect SkBlendImageFilter::onFilterBounds(const SkIRect& src, + const SkMatrix& ctm, + MapDirection dir, + const SkIRect* inputRect) const { + if (kReverse_MapDirection == dir) { + return INHERITED::onFilterBounds(src, ctm, dir, inputRect); + } + + SkASSERT(!inputRect); + SkASSERT(2 == this->countInputs()); + auto getBackground = [&]() { + return this->getInput(0) ? this->getInput(0)->filterBounds(src, ctm, dir, inputRect) : src; + }; + auto getForeground = [&]() { + return this->getInput(1) ? this->getInput(1)->filterBounds(src, ctm, dir, inputRect) : src; + }; + if (auto bm = as_BB(fBlender)->asBlendMode()) { + switch (bm.value()) { + case SkBlendMode::kClear: + return SkIRect::MakeEmpty(); + + case SkBlendMode::kSrc: + case SkBlendMode::kDstATop: + return getForeground(); + + case SkBlendMode::kDst: + case SkBlendMode::kSrcATop: + return getBackground(); + + case SkBlendMode::kSrcIn: + case SkBlendMode::kDstIn: { + auto result = getBackground(); + if (!result.intersect(getForeground())) { + return SkIRect::MakeEmpty(); + } + return result; + } + default: break; + } + } + auto result = getBackground(); + result.join(getForeground()); + return result; +} + +void SkBlendImageFilter::drawForeground(SkCanvas* canvas, SkSpecialImage* img, + const SkIRect& fgBounds) const { + SkPaint paint; + paint.setBlender(fBlender); + if (img) { + img->draw(canvas, SkIntToScalar(fgBounds.fLeft), SkIntToScalar(fgBounds.fTop), + SkSamplingOptions(), &paint); + } + + SkAutoCanvasRestore acr(canvas, true); + canvas->clipRect(SkRect::Make(fgBounds), SkClipOp::kDifference); + paint.setColor(0); + canvas->drawPaint(paint); +} + +#if defined(SK_GANESH) + +sk_sp SkBlendImageFilter::filterImageGPU(const Context& ctx, + sk_sp background, + const SkIPoint& backgroundOffset, + sk_sp foreground, + const SkIPoint& foregroundOffset, + const SkIRect& bounds) const { + SkASSERT(ctx.gpuBacked()); + + auto rContext = ctx.getContext(); + + GrSurfaceProxyView backgroundView, foregroundView; + + if (background) { + backgroundView = background->view(rContext); + } + + if (foreground) { + foregroundView = foreground->view(rContext); + } + + std::unique_ptr fp; + const auto& caps = *ctx.getContext()->priv().caps(); + GrSamplerState sampler(GrSamplerState::WrapMode::kClampToBorder, + GrSamplerState::Filter::kNearest); + + if (backgroundView.asTextureProxy()) { + SkRect bgSubset = SkRect::Make(background->subset()); + SkMatrix bgMatrix = SkMatrix::Translate( + SkIntToScalar(bgSubset.left() - backgroundOffset.fX), + SkIntToScalar(bgSubset.top() - backgroundOffset.fY)); + fp = GrTextureEffect::MakeSubset(std::move(backgroundView), background->alphaType(), + bgMatrix, sampler, bgSubset, caps); + fp = GrColorSpaceXformEffect::Make(std::move(fp), background->getColorSpace(), + background->alphaType(), ctx.colorSpace(), + kPremul_SkAlphaType); + } else { + fp = GrFragmentProcessor::MakeColor(SK_PMColor4fTRANSPARENT); + } + + GrImageInfo info(ctx.grColorType(), kPremul_SkAlphaType, ctx.refColorSpace(), bounds.size()); + + if (foregroundView.asTextureProxy()) { + SkRect fgSubset = SkRect::Make(foreground->subset()); + SkMatrix fgMatrix = SkMatrix::Translate( + SkIntToScalar(fgSubset.left() - foregroundOffset.fX), + SkIntToScalar(fgSubset.top() - foregroundOffset.fY)); + auto fgFP = GrTextureEffect::MakeSubset(std::move(foregroundView), foreground->alphaType(), + fgMatrix, sampler, fgSubset, caps); + fgFP = GrColorSpaceXformEffect::Make(std::move(fgFP), foreground->getColorSpace(), + foreground->alphaType(), ctx.colorSpace(), + kPremul_SkAlphaType); + + SkSurfaceProps props{}; // default OK; blend-image filters don't render text + GrFPArgs args(rContext, &info.colorInfo(), props); + + fp = as_BB(fBlender)->asFragmentProcessor(std::move(fgFP), std::move(fp), args); + } + + auto sfc = rContext->priv().makeSFC( + info, "BlendImageFilter_FilterImageGPU", SkBackingFit::kApprox); + if (!sfc) { + return nullptr; + } + + sfc->fillRectToRectWithFP(bounds, SkIRect::MakeSize(bounds.size()), std::move(fp)); + + return SkSpecialImage::MakeDeferredFromGpu(rContext, + SkIRect::MakeWH(bounds.width(), bounds.height()), + kNeedNewImageUniqueID_SpecialImage, + sfc->readSurfaceView(), + sfc->colorInfo(), + ctx.surfaceProps()); +} + +#endif diff --git a/gfx/skia/skia/src/effects/imagefilters/SkBlurImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkBlurImageFilter.cpp new file mode 100644 index 0000000000..d8c94d7e5d --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkBlurImageFilter.cpp @@ -0,0 +1,1038 @@ +/* + * Copyright 2011 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkColorType.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkTileMode.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkMalloc.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkVx.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkGpuBlurUtils.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SurfaceDrawContext.h" +#endif // defined(SK_GANESH) + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1 + #include + #define SK_PREFETCH(ptr) _mm_prefetch(reinterpret_cast(ptr), _MM_HINT_T0) +#elif defined(__GNUC__) + #define SK_PREFETCH(ptr) __builtin_prefetch(ptr) +#else + #define SK_PREFETCH(ptr) +#endif + +namespace { + +class SkBlurImageFilter final : public SkImageFilter_Base { +public: + SkBlurImageFilter(SkScalar sigmaX, SkScalar sigmaY, SkTileMode tileMode, + sk_sp input, const SkRect* cropRect) + : INHERITED(&input, 1, cropRect) + , fSigma{sigmaX, sigmaY} + , fTileMode(tileMode) {} + + SkRect computeFastBounds(const SkRect&) const override; + +protected: + void flatten(SkWriteBuffer&) const override; + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + +private: + friend void ::SkRegisterBlurImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkBlurImageFilter) + +#if defined(SK_GANESH) + sk_sp gpuFilter( + const Context& ctx, SkVector sigma, + const sk_sp &input, + SkIRect inputBounds, SkIRect dstBounds, SkIPoint inputOffset, SkIPoint* offset) const; +#endif + + SkSize fSigma; + SkTileMode fTileMode; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Blur( + SkScalar sigmaX, SkScalar sigmaY, SkTileMode tileMode, sk_sp input, + const CropRect& cropRect) { + if (sigmaX < SK_ScalarNearlyZero && sigmaY < SK_ScalarNearlyZero && !cropRect) { + return input; + } + return sk_sp( + new SkBlurImageFilter(sigmaX, sigmaY, tileMode, input, cropRect)); +} + +void SkRegisterBlurImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkBlurImageFilter); + SkFlattenable::Register("SkBlurImageFilterImpl", SkBlurImageFilter::CreateProc); +} + +sk_sp SkBlurImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkScalar sigmaX = buffer.readScalar(); + SkScalar sigmaY = buffer.readScalar(); + SkTileMode tileMode = buffer.read32LE(SkTileMode::kLastTileMode); + return SkImageFilters::Blur( + sigmaX, sigmaY, tileMode, common.getInput(0), common.cropRect()); +} + +void SkBlurImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeScalar(fSigma.fWidth); + buffer.writeScalar(fSigma.fHeight); + + SkASSERT(fTileMode <= SkTileMode::kLastTileMode); + buffer.writeInt(static_cast(fTileMode)); +} + +/////////////////////////////////////////////////////////////////////////////// + +namespace { +// This is defined by the SVG spec: +// https://drafts.fxtf.org/filter-effects/#feGaussianBlurElement +int calculate_window(double sigma) { + auto possibleWindow = static_cast(floor(sigma * 3 * sqrt(2 * SK_DoublePI) / 4 + 0.5)); + return std::max(1, possibleWindow); +} + +// This rather arbitrary-looking value results in a maximum box blur kernel size +// of 1000 pixels on the raster path, which matches the WebKit and Firefox +// implementations. Since the GPU path does not compute a box blur, putting +// the limit on sigma ensures consistent behaviour between the GPU and +// raster paths. +static constexpr SkScalar kMaxSigma = 532.f; + +static SkVector map_sigma(const SkSize& localSigma, const SkMatrix& ctm) { + SkVector sigma = SkVector::Make(localSigma.width(), localSigma.height()); + ctm.mapVectors(&sigma, 1); + sigma.fX = std::min(SkScalarAbs(sigma.fX), kMaxSigma); + sigma.fY = std::min(SkScalarAbs(sigma.fY), kMaxSigma); + // Disable blurring on axes that were never finite, or became non-finite after mapping by ctm. + if (!SkScalarIsFinite(sigma.fX)) { + sigma.fX = 0.f; + } + if (!SkScalarIsFinite(sigma.fY)) { + sigma.fY = 0.f; + } + return sigma; +} + + +class Pass { +public: + explicit Pass(int border) : fBorder(border) {} + virtual ~Pass() = default; + + void blur(int srcLeft, int srcRight, int dstRight, + const uint32_t* src, int srcStride, + uint32_t* dst, int dstStride) { + this->startBlur(); + + auto srcStart = srcLeft - fBorder, + srcEnd = srcRight - fBorder, + dstEnd = dstRight, + srcIdx = srcStart, + dstIdx = 0; + + const uint32_t* srcCursor = src; + uint32_t* dstCursor = dst; + + if (dstIdx < srcIdx) { + // The destination pixels are not effected by the src pixels, + // change to zero as per the spec. + // https://drafts.fxtf.org/filter-effects/#FilterPrimitivesOverviewIntro + while (dstIdx < srcIdx) { + *dstCursor = 0; + dstCursor += dstStride; + SK_PREFETCH(dstCursor); + dstIdx++; + } + } else if (srcIdx < dstIdx) { + // The edge of the source is before the edge of the destination. Calculate the sums for + // the pixels before the start of the destination. + if (int commonEnd = std::min(dstIdx, srcEnd); srcIdx < commonEnd) { + // Preload the blur with values from src before dst is entered. + int n = commonEnd - srcIdx; + this->blurSegment(n, srcCursor, srcStride, nullptr, 0); + srcIdx += n; + srcCursor += n * srcStride; + } + if (srcIdx < dstIdx) { + // The weird case where src is out of pixels before dst is even started. + int n = dstIdx - srcIdx; + this->blurSegment(n, nullptr, 0, nullptr, 0); + srcIdx += n; + } + } + + // Both srcIdx and dstIdx are in sync now, and can run in a 1:1 fashion. This is the + // normal mode of operation. + SkASSERT(srcIdx == dstIdx); + if (int commonEnd = std::min(dstEnd, srcEnd); dstIdx < commonEnd) { + int n = commonEnd - dstIdx; + this->blurSegment(n, srcCursor, srcStride, dstCursor, dstStride); + srcCursor += n * srcStride; + dstCursor += n * dstStride; + dstIdx += n; + srcIdx += n; + } + + // Drain the remaining blur values into dst assuming 0's for the leading edge. + if (dstIdx < dstEnd) { + int n = dstEnd - dstIdx; + this->blurSegment(n, nullptr, 0, dstCursor, dstStride); + } + } + +protected: + virtual void startBlur() = 0; + virtual void blurSegment( + int n, const uint32_t* src, int srcStride, uint32_t* dst, int dstStride) = 0; + +private: + const int fBorder; +}; + +class PassMaker { +public: + explicit PassMaker(int window) : fWindow{window} {} + virtual ~PassMaker() = default; + virtual Pass* makePass(void* buffer, SkArenaAlloc* alloc) const = 0; + virtual size_t bufferSizeBytes() const = 0; + int window() const {return fWindow;} + +private: + const int fWindow; +}; + +// Implement a scanline processor that uses a three-box filter to approximate a Gaussian blur. +// The GaussPass is limit to processing sigmas < 135. +class GaussPass final : public Pass { +public: + // NB 136 is the largest sigma that will not cause a buffer full of 255 mask values to overflow + // using the Gauss filter. It also limits the size of buffers used hold intermediate values. + // Explanation of maximums: + // sum0 = window * 255 + // sum1 = window * sum0 -> window * window * 255 + // sum2 = window * sum1 -> window * window * window * 255 -> window^3 * 255 + // + // The value window^3 * 255 must fit in a uint32_t. So, + // window^3 < 2^32. window = 255. + // + // window = floor(sigma * 3 * sqrt(2 * kPi) / 4 + 0.5) + // For window <= 255, the largest value for sigma is 136. + static PassMaker* MakeMaker(double sigma, SkArenaAlloc* alloc) { + SkASSERT(0 <= sigma); + int window = calculate_window(sigma); + if (255 <= window) { + return nullptr; + } + + class Maker : public PassMaker { + public: + explicit Maker(int window) : PassMaker{window} {} + Pass* makePass(void* buffer, SkArenaAlloc* alloc) const override { + return GaussPass::Make(this->window(), buffer, alloc); + } + + size_t bufferSizeBytes() const override { + int window = this->window(); + size_t onePassSize = window - 1; + // If the window is odd, then there is an obvious middle element. For even sizes + // 2 passes are shifted, and the last pass has an extra element. Like this: + // S + // aaaAaa + // bbBbbb + // cccCccc + // D + size_t bufferCount = (window & 1) == 1 ? 3 * onePassSize : 3 * onePassSize + 1; + return bufferCount * sizeof(skvx::Vec<4, uint32_t>); + } + }; + + return alloc->make(window); + } + + static GaussPass* Make(int window, void* buffers, SkArenaAlloc* alloc) { + // We don't need to store the trailing edge pixel in the buffer; + int passSize = window - 1; + skvx::Vec<4, uint32_t>* buffer0 = static_cast*>(buffers); + skvx::Vec<4, uint32_t>* buffer1 = buffer0 + passSize; + skvx::Vec<4, uint32_t>* buffer2 = buffer1 + passSize; + // If the window is odd just one buffer is needed, but if it's even, then there is one + // more element on that pass. + skvx::Vec<4, uint32_t>* buffersEnd = buffer2 + ((window & 1) ? passSize : passSize + 1); + + // Calculating the border is tricky. The border is the distance in pixels between the first + // dst pixel and the first src pixel (or the last src pixel and the last dst pixel). + // I will go through the odd case which is simpler, and then through the even case. Given a + // stack of filters seven wide for the odd case of three passes. + // + // S + // aaaAaaa + // bbbBbbb + // cccCccc + // D + // + // The furthest changed pixel is when the filters are in the following configuration. + // + // S + // aaaAaaa + // bbbBbbb + // cccCccc + // D + // + // The A pixel is calculated using the value S, the B uses A, and the C uses B, and + // finally D is C. So, with a window size of seven the border is nine. In the odd case, the + // border is 3*((window - 1)/2). + // + // For even cases the filter stack is more complicated. The spec specifies two passes + // of even filters and a final pass of odd filters. A stack for a width of six looks like + // this. + // + // S + // aaaAaa + // bbBbbb + // cccCccc + // D + // + // The furthest pixel looks like this. + // + // S + // aaaAaa + // bbBbbb + // cccCccc + // D + // + // For a window of six, the border value is eight. In the even case the border is 3 * + // (window/2) - 1. + int border = (window & 1) == 1 ? 3 * ((window - 1) / 2) : 3 * (window / 2) - 1; + + // If the window is odd then the divisor is just window ^ 3 otherwise, + // it is window * window * (window + 1) = window ^ 3 + window ^ 2; + int window2 = window * window; + int window3 = window2 * window; + int divisor = (window & 1) == 1 ? window3 : window3 + window2; + return alloc->make(buffer0, buffer1, buffer2, buffersEnd, border, divisor); + } + + GaussPass(skvx::Vec<4, uint32_t>* buffer0, + skvx::Vec<4, uint32_t>* buffer1, + skvx::Vec<4, uint32_t>* buffer2, + skvx::Vec<4, uint32_t>* buffersEnd, + int border, + int divisor) + : Pass{border} + , fBuffer0{buffer0} + , fBuffer1{buffer1} + , fBuffer2{buffer2} + , fBuffersEnd{buffersEnd} + , fDivider(divisor) {} + +private: + void startBlur() override { + skvx::Vec<4, uint32_t> zero = {0u, 0u, 0u, 0u}; + zero.store(fSum0); + zero.store(fSum1); + auto half = fDivider.half(); + skvx::Vec<4, uint32_t>{half, half, half, half}.store(fSum2); + sk_bzero(fBuffer0, (fBuffersEnd - fBuffer0) * sizeof(skvx::Vec<4, uint32_t>)); + + fBuffer0Cursor = fBuffer0; + fBuffer1Cursor = fBuffer1; + fBuffer2Cursor = fBuffer2; + } + + // GaussPass implements the common three pass box filter approximation of Gaussian blur, + // but combines all three passes into a single pass. This approach is facilitated by three + // circular buffers the width of the window which track values for trailing edges of each of + // the three passes. This allows the algorithm to use more precision in the calculation + // because the values are not rounded each pass. And this implementation also avoids a trap + // that's easy to fall into resulting in blending in too many zeroes near the edge. + // + // In general, a window sum has the form: + // sum_n+1 = sum_n + leading_edge - trailing_edge. + // If instead we do the subtraction at the end of the previous iteration, we can just + // calculate the sums instead of having to do the subtractions too. + // + // In previous iteration: + // sum_n+1 = sum_n - trailing_edge. + // + // In this iteration: + // sum_n+1 = sum_n + leading_edge. + // + // Now we can stack all three sums and do them at once. Sum0 gets its leading edge from the + // actual data. Sum1's leading edge is just Sum0, and Sum2's leading edge is Sum1. So, doing the + // three passes at the same time has the form: + // + // sum0_n+1 = sum0_n + leading edge + // sum1_n+1 = sum1_n + sum0_n+1 + // sum2_n+1 = sum2_n + sum1_n+1 + // + // sum2_n+1 / window^3 is the new value of the destination pixel. + // + // Reduce the sums by the trailing edges which were stored in the circular buffers for the + // next go around. This is the case for odd sized windows, even windows the the third + // circular buffer is one larger then the first two circular buffers. + // + // sum2_n+2 = sum2_n+1 - buffer2[i]; + // buffer2[i] = sum1; + // sum1_n+2 = sum1_n+1 - buffer1[i]; + // buffer1[i] = sum0; + // sum0_n+2 = sum0_n+1 - buffer0[i]; + // buffer0[i] = leading edge + void blurSegment( + int n, const uint32_t* src, int srcStride, uint32_t* dst, int dstStride) override { + skvx::Vec<4, uint32_t>* buffer0Cursor = fBuffer0Cursor; + skvx::Vec<4, uint32_t>* buffer1Cursor = fBuffer1Cursor; + skvx::Vec<4, uint32_t>* buffer2Cursor = fBuffer2Cursor; + skvx::Vec<4, uint32_t> sum0 = skvx::Vec<4, uint32_t>::Load(fSum0); + skvx::Vec<4, uint32_t> sum1 = skvx::Vec<4, uint32_t>::Load(fSum1); + skvx::Vec<4, uint32_t> sum2 = skvx::Vec<4, uint32_t>::Load(fSum2); + + // Given an expanded input pixel, move the window ahead using the leadingEdge value. + auto processValue = [&](const skvx::Vec<4, uint32_t>& leadingEdge) { + sum0 += leadingEdge; + sum1 += sum0; + sum2 += sum1; + + skvx::Vec<4, uint32_t> blurred = fDivider.divide(sum2); + + sum2 -= *buffer2Cursor; + *buffer2Cursor = sum1; + buffer2Cursor = (buffer2Cursor + 1) < fBuffersEnd ? buffer2Cursor + 1 : fBuffer2; + sum1 -= *buffer1Cursor; + *buffer1Cursor = sum0; + buffer1Cursor = (buffer1Cursor + 1) < fBuffer2 ? buffer1Cursor + 1 : fBuffer1; + sum0 -= *buffer0Cursor; + *buffer0Cursor = leadingEdge; + buffer0Cursor = (buffer0Cursor + 1) < fBuffer1 ? buffer0Cursor + 1 : fBuffer0; + + return skvx::cast(blurred); + }; + + auto loadEdge = [&](const uint32_t* srcCursor) { + return skvx::cast(skvx::Vec<4, uint8_t>::Load(srcCursor)); + }; + + if (!src && !dst) { + while (n --> 0) { + (void)processValue(0); + } + } else if (src && !dst) { + while (n --> 0) { + (void)processValue(loadEdge(src)); + src += srcStride; + } + } else if (!src && dst) { + while (n --> 0) { + processValue(0u).store(dst); + dst += dstStride; + } + } else if (src && dst) { + while (n --> 0) { + processValue(loadEdge(src)).store(dst); + src += srcStride; + dst += dstStride; + } + } + + // Store the state + fBuffer0Cursor = buffer0Cursor; + fBuffer1Cursor = buffer1Cursor; + fBuffer2Cursor = buffer2Cursor; + + sum0.store(fSum0); + sum1.store(fSum1); + sum2.store(fSum2); + } + + skvx::Vec<4, uint32_t>* const fBuffer0; + skvx::Vec<4, uint32_t>* const fBuffer1; + skvx::Vec<4, uint32_t>* const fBuffer2; + skvx::Vec<4, uint32_t>* const fBuffersEnd; + const skvx::ScaledDividerU32 fDivider; + + // blur state + char fSum0[sizeof(skvx::Vec<4, uint32_t>)]; + char fSum1[sizeof(skvx::Vec<4, uint32_t>)]; + char fSum2[sizeof(skvx::Vec<4, uint32_t>)]; + skvx::Vec<4, uint32_t>* fBuffer0Cursor; + skvx::Vec<4, uint32_t>* fBuffer1Cursor; + skvx::Vec<4, uint32_t>* fBuffer2Cursor; +}; + +// Implement a scanline processor that uses a two-box filter to approximate a Tent filter. +// The TentPass is limit to processing sigmas < 2183. +class TentPass final : public Pass { +public: + // NB 2183 is the largest sigma that will not cause a buffer full of 255 mask values to overflow + // using the Tent filter. It also limits the size of buffers used hold intermediate values. + // Explanation of maximums: + // sum0 = window * 255 + // sum1 = window * sum0 -> window * window * 255 + // + // The value window^2 * 255 must fit in a uint32_t. So, + // window^2 < 2^32. window = 4104. + // + // window = floor(sigma * 3 * sqrt(2 * kPi) / 4 + 0.5) + // For window <= 4104, the largest value for sigma is 2183. + static PassMaker* MakeMaker(double sigma, SkArenaAlloc* alloc) { + SkASSERT(0 <= sigma); + int gaussianWindow = calculate_window(sigma); + // This is a naive method of using the window size for the Gaussian blur to calculate the + // window size for the Tent blur. This seems to work well in practice. + // + // We can use a single pixel to generate the effective blur area given a window size. For + // the Gaussian blur this is 3 * window size. For the Tent filter this is 2 * window size. + int tentWindow = 3 * gaussianWindow / 2; + if (tentWindow >= 4104) { + return nullptr; + } + + class Maker : public PassMaker { + public: + explicit Maker(int window) : PassMaker{window} {} + Pass* makePass(void* buffer, SkArenaAlloc* alloc) const override { + return TentPass::Make(this->window(), buffer, alloc); + } + + size_t bufferSizeBytes() const override { + size_t onePassSize = this->window() - 1; + // If the window is odd, then there is an obvious middle element. For even sizes 2 + // passes are shifted, and the last pass has an extra element. Like this: + // S + // aaaAaa + // bbBbbb + // D + size_t bufferCount = 2 * onePassSize; + return bufferCount * sizeof(skvx::Vec<4, uint32_t>); + } + }; + + return alloc->make(tentWindow); + } + + static TentPass* Make(int window, void* buffers, SkArenaAlloc* alloc) { + if (window > 4104) { + return nullptr; + } + + // We don't need to store the trailing edge pixel in the buffer; + int passSize = window - 1; + skvx::Vec<4, uint32_t>* buffer0 = static_cast*>(buffers); + skvx::Vec<4, uint32_t>* buffer1 = buffer0 + passSize; + skvx::Vec<4, uint32_t>* buffersEnd = buffer1 + passSize; + + // Calculating the border is tricky. The border is the distance in pixels between the first + // dst pixel and the first src pixel (or the last src pixel and the last dst pixel). + // I will go through the odd case which is simpler, and then through the even case. Given a + // stack of filters seven wide for the odd case of three passes. + // + // S + // aaaAaaa + // bbbBbbb + // D + // + // The furthest changed pixel is when the filters are in the following configuration. + // + // S + // aaaAaaa + // bbbBbbb + // D + // + // The A pixel is calculated using the value S, the B uses A, and the D uses B. + // So, with a window size of seven the border is nine. In the odd case, the border is + // window - 1. + // + // For even cases the filter stack is more complicated. It uses two passes + // of even filters offset from each other. A stack for a width of six looks like + // this. + // + // S + // aaaAaa + // bbBbbb + // D + // + // The furthest pixel looks like this. + // + // S + // aaaAaa + // bbBbbb + // D + // + // For a window of six, the border value is 5. In the even case the border is + // window - 1. + int border = window - 1; + + int divisor = window * window; + return alloc->make(buffer0, buffer1, buffersEnd, border, divisor); + } + + TentPass(skvx::Vec<4, uint32_t>* buffer0, + skvx::Vec<4, uint32_t>* buffer1, + skvx::Vec<4, uint32_t>* buffersEnd, + int border, + int divisor) + : Pass{border} + , fBuffer0{buffer0} + , fBuffer1{buffer1} + , fBuffersEnd{buffersEnd} + , fDivider(divisor) {} + +private: + void startBlur() override { + skvx::Vec<4, uint32_t>{0u, 0u, 0u, 0u}.store(fSum0); + auto half = fDivider.half(); + skvx::Vec<4, uint32_t>{half, half, half, half}.store(fSum1); + sk_bzero(fBuffer0, (fBuffersEnd - fBuffer0) * sizeof(skvx::Vec<4, uint32_t>)); + + fBuffer0Cursor = fBuffer0; + fBuffer1Cursor = fBuffer1; + } + + // TentPass implements the common two pass box filter approximation of Tent filter, + // but combines all both passes into a single pass. This approach is facilitated by two + // circular buffers the width of the window which track values for trailing edges of each of + // both passes. This allows the algorithm to use more precision in the calculation + // because the values are not rounded each pass. And this implementation also avoids a trap + // that's easy to fall into resulting in blending in too many zeroes near the edge. + // + // In general, a window sum has the form: + // sum_n+1 = sum_n + leading_edge - trailing_edge. + // If instead we do the subtraction at the end of the previous iteration, we can just + // calculate the sums instead of having to do the subtractions too. + // + // In previous iteration: + // sum_n+1 = sum_n - trailing_edge. + // + // In this iteration: + // sum_n+1 = sum_n + leading_edge. + // + // Now we can stack all three sums and do them at once. Sum0 gets its leading edge from the + // actual data. Sum1's leading edge is just Sum0, and Sum2's leading edge is Sum1. So, doing the + // three passes at the same time has the form: + // + // sum0_n+1 = sum0_n + leading edge + // sum1_n+1 = sum1_n + sum0_n+1 + // + // sum1_n+1 / window^2 is the new value of the destination pixel. + // + // Reduce the sums by the trailing edges which were stored in the circular buffers for the + // next go around. + // + // sum1_n+2 = sum1_n+1 - buffer1[i]; + // buffer1[i] = sum0; + // sum0_n+2 = sum0_n+1 - buffer0[i]; + // buffer0[i] = leading edge + void blurSegment( + int n, const uint32_t* src, int srcStride, uint32_t* dst, int dstStride) override { + skvx::Vec<4, uint32_t>* buffer0Cursor = fBuffer0Cursor; + skvx::Vec<4, uint32_t>* buffer1Cursor = fBuffer1Cursor; + skvx::Vec<4, uint32_t> sum0 = skvx::Vec<4, uint32_t>::Load(fSum0); + skvx::Vec<4, uint32_t> sum1 = skvx::Vec<4, uint32_t>::Load(fSum1); + + // Given an expanded input pixel, move the window ahead using the leadingEdge value. + auto processValue = [&](const skvx::Vec<4, uint32_t>& leadingEdge) { + sum0 += leadingEdge; + sum1 += sum0; + + skvx::Vec<4, uint32_t> blurred = fDivider.divide(sum1); + + sum1 -= *buffer1Cursor; + *buffer1Cursor = sum0; + buffer1Cursor = (buffer1Cursor + 1) < fBuffersEnd ? buffer1Cursor + 1 : fBuffer1; + sum0 -= *buffer0Cursor; + *buffer0Cursor = leadingEdge; + buffer0Cursor = (buffer0Cursor + 1) < fBuffer1 ? buffer0Cursor + 1 : fBuffer0; + + return skvx::cast(blurred); + }; + + auto loadEdge = [&](const uint32_t* srcCursor) { + return skvx::cast(skvx::Vec<4, uint8_t>::Load(srcCursor)); + }; + + if (!src && !dst) { + while (n --> 0) { + (void)processValue(0); + } + } else if (src && !dst) { + while (n --> 0) { + (void)processValue(loadEdge(src)); + src += srcStride; + } + } else if (!src && dst) { + while (n --> 0) { + processValue(0u).store(dst); + dst += dstStride; + } + } else if (src && dst) { + while (n --> 0) { + processValue(loadEdge(src)).store(dst); + src += srcStride; + dst += dstStride; + } + } + + // Store the state + fBuffer0Cursor = buffer0Cursor; + fBuffer1Cursor = buffer1Cursor; + sum0.store(fSum0); + sum1.store(fSum1); + } + + skvx::Vec<4, uint32_t>* const fBuffer0; + skvx::Vec<4, uint32_t>* const fBuffer1; + skvx::Vec<4, uint32_t>* const fBuffersEnd; + const skvx::ScaledDividerU32 fDivider; + + // blur state + char fSum0[sizeof(skvx::Vec<4, uint32_t>)]; + char fSum1[sizeof(skvx::Vec<4, uint32_t>)]; + skvx::Vec<4, uint32_t>* fBuffer0Cursor; + skvx::Vec<4, uint32_t>* fBuffer1Cursor; +}; + +sk_sp copy_image_with_bounds( + const SkImageFilter_Base::Context& ctx, const sk_sp &input, + SkIRect srcBounds, SkIRect dstBounds) { + SkBitmap inputBM; + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if (inputBM.colorType() != kN32_SkColorType) { + return nullptr; + } + + SkBitmap src; + inputBM.extractSubset(&src, srcBounds); + + // Make everything relative to the destination bounds. + srcBounds.offset(-dstBounds.x(), -dstBounds.y()); + dstBounds.offset(-dstBounds.x(), -dstBounds.y()); + + auto srcW = srcBounds.width(), + dstW = dstBounds.width(), + dstH = dstBounds.height(); + + SkImageInfo dstInfo = SkImageInfo::Make(dstW, dstH, inputBM.colorType(), inputBM.alphaType()); + + SkBitmap dst; + if (!dst.tryAllocPixels(dstInfo)) { + return nullptr; + } + + // There is no blurring to do, but we still need to copy the source while accounting for the + // dstBounds. Remember that the src was intersected with the dst. + int y = 0; + size_t dstWBytes = dstW * sizeof(uint32_t); + for (;y < srcBounds.top(); y++) { + sk_bzero(dst.getAddr32(0, y), dstWBytes); + } + + for (;y < srcBounds.bottom(); y++) { + int x = 0; + uint32_t* dstPtr = dst.getAddr32(0, y); + for (;x < srcBounds.left(); x++) { + *dstPtr++ = 0; + } + + memcpy(dstPtr, src.getAddr32(x - srcBounds.left(), y - srcBounds.top()), + srcW * sizeof(uint32_t)); + + dstPtr += srcW; + x += srcW; + + for (;x < dstBounds.right(); x++) { + *dstPtr++ = 0; + } + } + + for (;y < dstBounds.bottom(); y++) { + sk_bzero(dst.getAddr32(0, y), dstWBytes); + } + + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(dstBounds.width(), + dstBounds.height()), + dst, ctx.surfaceProps()); +} + +// TODO: Implement CPU backend for different fTileMode. +sk_sp cpu_blur( + const SkImageFilter_Base::Context& ctx, + SkVector sigma, const sk_sp &input, + SkIRect srcBounds, SkIRect dstBounds) { + // map_sigma limits sigma to 532 to match 1000px box filter limit of WebKit and Firefox. + // Since this does not exceed the limits of the TentPass (2183), there won't be overflow when + // computing a kernel over a pixel window filled with 255. + static_assert(kMaxSigma <= 2183.0f); + + SkSTArenaAlloc<1024> alloc; + auto makeMaker = [&](double sigma) -> PassMaker* { + SkASSERT(0 <= sigma && sigma <= 2183); // should be guaranteed after map_sigma + if (PassMaker* maker = GaussPass::MakeMaker(sigma, &alloc)) { + return maker; + } + if (PassMaker* maker = TentPass::MakeMaker(sigma, &alloc)) { + return maker; + } + SK_ABORT("Sigma is out of range."); + }; + + PassMaker* makerX = makeMaker(sigma.x()); + PassMaker* makerY = makeMaker(sigma.y()); + + if (makerX->window() <= 1 && makerY->window() <= 1) { + return copy_image_with_bounds(ctx, input, srcBounds, dstBounds); + } + + SkBitmap inputBM; + + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if (inputBM.colorType() != kN32_SkColorType) { + return nullptr; + } + + SkBitmap src; + inputBM.extractSubset(&src, srcBounds); + + // Make everything relative to the destination bounds. + srcBounds.offset(-dstBounds.x(), -dstBounds.y()); + dstBounds.offset(-dstBounds.x(), -dstBounds.y()); + + auto srcW = srcBounds.width(), + srcH = srcBounds.height(), + dstW = dstBounds.width(), + dstH = dstBounds.height(); + + SkImageInfo dstInfo = inputBM.info().makeWH(dstW, dstH); + + SkBitmap dst; + if (!dst.tryAllocPixels(dstInfo)) { + return nullptr; + } + + size_t bufferSizeBytes = std::max(makerX->bufferSizeBytes(), makerY->bufferSizeBytes()); + auto buffer = alloc.makeBytesAlignedTo(bufferSizeBytes, alignof(skvx::Vec<4, uint32_t>)); + + // Basic Plan: The three cases to handle + // * Horizontal and Vertical - blur horizontally while copying values from the source to + // the destination. Then, do an in-place vertical blur. + // * Horizontal only - blur horizontally copying values from the source to the destination. + // * Vertical only - blur vertically copying values from the source to the destination. + + // Default to vertical only blur case. If a horizontal blur is needed, then these values + // will be adjusted while doing the horizontal blur. + auto intermediateSrc = static_cast(src.getPixels()); + auto intermediateRowBytesAsPixels = src.rowBytesAsPixels(); + auto intermediateWidth = srcW; + + // Because the border is calculated before the fork of the GPU/CPU path. The border is + // the maximum of the two rendering methods. In the case where sigma is zero, then the + // src and dst left values are the same. If sigma is small resulting in a window size of + // 1, then border calculations add some pixels which will always be zero. Inset the + // destination by those zero pixels. This case is very rare. + auto intermediateDst = dst.getAddr32(srcBounds.left(), 0); + + // The following code is executed very rarely, I have never seen it in a real web + // page. If sigma is small but not zero then shared GPU/CPU border calculation + // code adds extra pixels for the border. Just clear everything to clear those pixels. + // This solution is overkill, but very simple. + if (makerX->window() == 1 || makerY->window() == 1) { + dst.eraseColor(0); + } + + if (makerX->window() > 1) { + Pass* pass = makerX->makePass(buffer, &alloc); + // Make int64 to avoid overflow in multiplication below. + int64_t shift = srcBounds.top() - dstBounds.top(); + + // For the horizontal blur, starts part way down in anticipation of the vertical blur. + // For a vertical sigma of zero shift should be zero. But, for small sigma, + // shift may be > 0 but the vertical window could be 1. + intermediateSrc = static_cast(dst.getPixels()) + + (shift > 0 ? shift * dst.rowBytesAsPixels() : 0); + intermediateRowBytesAsPixels = dst.rowBytesAsPixels(); + intermediateWidth = dstW; + intermediateDst = static_cast(dst.getPixels()); + + const uint32_t* srcCursor = static_cast(src.getPixels()); + uint32_t* dstCursor = intermediateSrc; + for (auto y = 0; y < srcH; y++) { + pass->blur(srcBounds.left(), srcBounds.right(), dstBounds.right(), + srcCursor, 1, dstCursor, 1); + srcCursor += src.rowBytesAsPixels(); + dstCursor += intermediateRowBytesAsPixels; + } + } + + if (makerY->window() > 1) { + Pass* pass = makerY->makePass(buffer, &alloc); + const uint32_t* srcCursor = intermediateSrc; + uint32_t* dstCursor = intermediateDst; + for (auto x = 0; x < intermediateWidth; x++) { + pass->blur(srcBounds.top(), srcBounds.bottom(), dstBounds.bottom(), + srcCursor, intermediateRowBytesAsPixels, + dstCursor, dst.rowBytesAsPixels()); + srcCursor += 1; + dstCursor += 1; + } + } + + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(dstBounds.width(), + dstBounds.height()), + dst, ctx.surfaceProps()); +} +} // namespace + +sk_sp SkBlurImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.fX, inputOffset.fY, + input->width(), input->height()); + + // Calculate the destination bounds. + SkIRect dstBounds; + if (!this->applyCropRect(this->mapContext(ctx), inputBounds, &dstBounds)) { + return nullptr; + } + if (!inputBounds.intersect(dstBounds)) { + return nullptr; + } + + // Save the offset in preparation to make all rectangles relative to the inputOffset. + SkIPoint resultOffset = SkIPoint::Make(dstBounds.fLeft, dstBounds.fTop); + + // Make all bounds relative to the inputOffset. + inputBounds.offset(-inputOffset); + dstBounds.offset(-inputOffset); + + SkVector sigma = map_sigma(fSigma, ctx.ctm()); + SkASSERT(SkScalarIsFinite(sigma.x()) && sigma.x() >= 0.f && sigma.x() <= kMaxSigma && + SkScalarIsFinite(sigma.y()) && sigma.y() >= 0.f && sigma.y() <= kMaxSigma); + + sk_sp result; +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + // Ensure the input is in the destination's gamut. This saves us from having to do the + // xform during the filter itself. + input = ImageToColorSpace(input.get(), ctx.colorType(), ctx.colorSpace(), + ctx.surfaceProps()); + result = this->gpuFilter(ctx, sigma, input, inputBounds, dstBounds, inputOffset, + &resultOffset); + } else +#endif + { + result = cpu_blur(ctx, sigma, input, inputBounds, dstBounds); + } + + // Return the resultOffset if the blur succeeded. + if (result != nullptr) { + *offset = resultOffset; + } + return result; +} + +#if defined(SK_GANESH) +sk_sp SkBlurImageFilter::gpuFilter( + const Context& ctx, SkVector sigma, const sk_sp &input, SkIRect inputBounds, + SkIRect dstBounds, SkIPoint inputOffset, SkIPoint* offset) const { + if (SkGpuBlurUtils::IsEffectivelyZeroSigma(sigma.x()) && + SkGpuBlurUtils::IsEffectivelyZeroSigma(sigma.y())) { + offset->fX = inputBounds.x() + inputOffset.fX; + offset->fY = inputBounds.y() + inputOffset.fY; + return input->makeSubset(inputBounds); + } + + auto context = ctx.getContext(); + + GrSurfaceProxyView inputView = input->view(context); + if (!inputView.proxy()) { + return nullptr; + } + SkASSERT(inputView.asTextureProxy()); + + dstBounds.offset(input->subset().topLeft()); + inputBounds.offset(input->subset().topLeft()); + auto sdc = SkGpuBlurUtils::GaussianBlur( + context, + std::move(inputView), + SkColorTypeToGrColorType(input->colorType()), + input->alphaType(), + ctx.refColorSpace(), + dstBounds, + inputBounds, + sigma.x(), + sigma.y(), + fTileMode); + if (!sdc) { + return nullptr; + } + + return SkSpecialImage::MakeDeferredFromGpu(context, + SkIRect::MakeSize(dstBounds.size()), + kNeedNewImageUniqueID_SpecialImage, + sdc->readSurfaceView(), + sdc->colorInfo(), + ctx.surfaceProps()); +} +#endif + +SkRect SkBlurImageFilter::computeFastBounds(const SkRect& src) const { + SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src; + bounds.outset(fSigma.width() * 3, fSigma.height() * 3); + return bounds; +} + +SkIRect SkBlurImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const { + SkVector sigma = map_sigma(fSigma, ctm); + return src.makeOutset(SkScalarCeilToInt(sigma.x() * 3), SkScalarCeilToInt(sigma.y() * 3)); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkColorFilterImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkColorFilterImageFilter.cpp new file mode 100644 index 0000000000..1b8fdf6bfc --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkColorFilterImageFilter.cpp @@ -0,0 +1,180 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include + +namespace { + +class SkColorFilterImageFilter final : public SkImageFilter_Base { +public: + SkColorFilterImageFilter(sk_sp cf, sk_sp input, + const SkRect* cropRect) + : INHERITED(&input, 1, cropRect) + , fColorFilter(std::move(cf)) {} + +protected: + void flatten(SkWriteBuffer&) const override; + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + bool onIsColorFilterNode(SkColorFilter**) const override; + MatrixCapability onGetCTMCapability() const override { return MatrixCapability::kComplex; } + bool onAffectsTransparentBlack() const override; + +private: + friend void ::SkRegisterColorFilterImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkColorFilterImageFilter) + + sk_sp fColorFilter; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::ColorFilter( + sk_sp cf, sk_sp input, const CropRect& cropRect) { + if (!cf) { + // The color filter is the identity, but 'cropRect' and 'input' may perform actions in the + // image filter graph. + const SkRect* crop = cropRect; + if (crop) { + // Wrap 'input' in an offset filter with (0,0) and the crop rect. + // TODO(michaelludwig): Replace this with SkCropImageFilter when that's ready for use. + return SkImageFilters::Offset(0.f, 0.f, std::move(input), cropRect); + } else { + // Just forward 'input' on + return input; + } + } + + SkColorFilter* inputCF; + if (input && input->isColorFilterNode(&inputCF)) { + // This is an optimization, as it collapses the hierarchy by just combining the two + // colorfilters into a single one, which the new imagefilter will wrap. + sk_sp newCF = cf->makeComposed(sk_sp(inputCF)); + if (newCF) { + return sk_sp(new SkColorFilterImageFilter( + std::move(newCF), sk_ref_sp(input->getInput(0)), cropRect)); + } + } + + return sk_sp(new SkColorFilterImageFilter( + std::move(cf), std::move(input), cropRect)); +} + +void SkRegisterColorFilterImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkColorFilterImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkColorFilterImageFilterImpl", SkColorFilterImageFilter::CreateProc); +} + + +sk_sp SkColorFilterImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + sk_sp cf(buffer.readColorFilter()); + return SkImageFilters::ColorFilter(std::move(cf), common.getInput(0), common.cropRect()); +} + +void SkColorFilterImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeFlattenable(fColorFilter.get()); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkColorFilterImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + + SkIRect inputBounds; + if (as_CFB(fColorFilter)->affectsTransparentBlack()) { + // If the color filter affects transparent black, the bounds are the entire clip. + inputBounds = ctx.clipBounds(); + } else if (!input) { + return nullptr; + } else { + inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(), + input->width(), input->height()); + } + + SkIRect bounds; + if (!this->applyCropRect(ctx, inputBounds, &bounds)) { + return nullptr; + } + + sk_sp surf(ctx.makeSurface(bounds.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + SkPaint paint; + + paint.setBlendMode(SkBlendMode::kSrc); + paint.setColorFilter(fColorFilter); + + // TODO: it may not be necessary to clear or drawPaint inside the input bounds + // (see skbug.com/5075) + if (as_CFB(fColorFilter)->affectsTransparentBlack()) { + // The subsequent input->draw() call may not fill the entire canvas. For filters which + // affect transparent black, ensure that the filter is applied everywhere. + paint.setColor(SK_ColorTRANSPARENT); + canvas->drawPaint(paint); + paint.setColor(SK_ColorBLACK); + } else { + canvas->clear(0x0); + } + + if (input) { + input->draw(canvas, + SkIntToScalar(inputOffset.fX - bounds.fLeft), + SkIntToScalar(inputOffset.fY - bounds.fTop), + SkSamplingOptions(), &paint); + } + + offset->fX = bounds.fLeft; + offset->fY = bounds.fTop; + return surf->makeImageSnapshot(); +} + +bool SkColorFilterImageFilter::onIsColorFilterNode(SkColorFilter** filter) const { + SkASSERT(1 == this->countInputs()); + if (!this->cropRectIsSet()) { + if (filter) { + *filter = SkRef(fColorFilter.get()); + } + return true; + } + return false; +} + +bool SkColorFilterImageFilter::onAffectsTransparentBlack() const { + return as_CFB(fColorFilter)->affectsTransparentBlack(); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkComposeImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkComposeImageFilter.cpp new file mode 100644 index 0000000000..b5692071f3 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkComposeImageFilter.cpp @@ -0,0 +1,141 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkImageFilterTypes.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkSpecialImage.h" + +#include + +class SkReadBuffer; + +namespace { + +class SkComposeImageFilter final : public SkImageFilter_Base { +public: + explicit SkComposeImageFilter(sk_sp inputs[2]) + : INHERITED(inputs, 2, nullptr) { + SkASSERT(inputs[0].get()); + SkASSERT(inputs[1].get()); + } + + SkRect computeFastBounds(const SkRect& src) const override; + +protected: + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + SkIRect onFilterBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + MatrixCapability onGetCTMCapability() const override { return MatrixCapability::kComplex; } + +private: + friend void ::SkRegisterComposeImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkComposeImageFilter) + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Compose(sk_sp outer, + sk_sp inner) { + if (!outer) { + return inner; + } + if (!inner) { + return outer; + } + sk_sp inputs[2] = { std::move(outer), std::move(inner) }; + return sk_sp(new SkComposeImageFilter(inputs)); +} + +void SkRegisterComposeImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkComposeImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkComposeImageFilterImpl", SkComposeImageFilter::CreateProc); +} + +sk_sp SkComposeImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2); + return SkImageFilters::Compose(common.getInput(0), common.getInput(1)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkRect SkComposeImageFilter::computeFastBounds(const SkRect& src) const { + const SkImageFilter* outer = this->getInput(0); + const SkImageFilter* inner = this->getInput(1); + + return outer->computeFastBounds(inner->computeFastBounds(src)); +} + +sk_sp SkComposeImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + // The bounds passed to the inner filter must be filtered by the outer + // filter, so that the inner filter produces the pixels that the outer + // filter requires as input. This matters if the outer filter moves pixels. + SkIRect innerClipBounds; + innerClipBounds = this->getInput(0)->filterBounds(ctx.clipBounds(), ctx.ctm(), + kReverse_MapDirection, &ctx.clipBounds()); + Context innerContext = ctx.withNewDesiredOutput(skif::LayerSpace(innerClipBounds)); + SkIPoint innerOffset = SkIPoint::Make(0, 0); + sk_sp inner(this->filterInput(1, innerContext, &innerOffset)); + if (!inner) { + return nullptr; + } + + // TODO (michaelludwig) - Once all filters are updated to process coordinate spaces more + // robustly, we can allow source images to have non-(0,0) origins, which will mean that the + // CTM/clipBounds modifications for the outerContext can go away. + SkMatrix outerMatrix(ctx.ctm()); + outerMatrix.postTranslate(SkIntToScalar(-innerOffset.x()), SkIntToScalar(-innerOffset.y())); + SkIRect clipBounds = ctx.clipBounds(); + clipBounds.offset(-innerOffset.x(), -innerOffset.y()); + // NOTE: This is the only spot in image filtering where the source image of the context + // is not constant for the entire DAG evaluation. Given that the inner and outer DAG branches + // were already created, there's no alternative way for the leaf nodes of the outer DAG to + // get the results of the inner DAG. Overriding the source image of the context has the correct + // effect, but means that the source image is not fixed for the entire filter process. + Context outerContext(outerMatrix, clipBounds, ctx.cache(), ctx.colorType(), ctx.colorSpace(), + inner.get()); + + SkIPoint outerOffset = SkIPoint::Make(0, 0); + sk_sp outer(this->filterInput(0, outerContext, &outerOffset)); + if (!outer) { + return nullptr; + } + + *offset = innerOffset + outerOffset; + return outer; +} + +SkIRect SkComposeImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection dir, const SkIRect* inputRect) const { + const SkImageFilter* outer = this->getInput(0); + const SkImageFilter* inner = this->getInput(1); + + if (dir == kReverse_MapDirection) { + // The output 'src' is processed by the outer filter, producing its required input bounds, + // which is then the output bounds required of the inner filter. We pass the inputRect to + // outer and not inner to match the default recursion logic of onGetInputLayerBounds + const SkIRect outerRect = outer->filterBounds(src, ctm, dir, inputRect); + return inner->filterBounds(outerRect, ctm, dir); + } else { + // The input 'src' is processed by the inner filter, producing the input bounds for the + // outer filter of the composition, which then produces the final forward output bounds + const SkIRect innerRect = inner->filterBounds(src, ctm, dir); + return outer->filterBounds(innerRect, ctm, dir); + } +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkCropImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkCropImageFilter.cpp new file mode 100644 index 0000000000..c4ad58d6ee --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkCropImageFilter.cpp @@ -0,0 +1,173 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/effects/imagefilters/SkCropImageFilter.h" + +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkRect.h" +#include "src/core/SkImageFilterTypes.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkValidationUtils.h" +#include "src/core/SkWriteBuffer.h" + +#include + +namespace { + +class SkCropImageFilter final : public SkImageFilter_Base { +public: + SkCropImageFilter(const SkRect& cropRect, sk_sp input) + : SkImageFilter_Base(&input, 1, /*cropRect=*/nullptr) + , fCropRect(cropRect) { + SkASSERT(cropRect.isFinite()); + SkASSERT(cropRect.isSorted()); + } + + SkRect computeFastBounds(const SkRect& bounds) const override; + +protected: + void flatten(SkWriteBuffer&) const override; + +private: + friend void ::SkRegisterCropImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkCropImageFilter) + + skif::FilterResult onFilterImage(const skif::Context& context) const override; + + skif::LayerSpace onGetInputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds, + VisitChildren recurse) const override; + + skif::LayerSpace onGetOutputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& contentBounds) const override; + + // The crop rect is specified in floating point to allow cropping to partial local pixels, + // that could become whole pixels in the layer-space image if the canvas is scaled. + // For now it's always rounded to integer pixels as if it were non-AA. + skif::LayerSpace cropRect(const skif::Mapping& mapping) const { + return mapping.paramToLayer(fCropRect).roundOut(); + } + + skif::ParameterSpace fCropRect; +}; + +} // end namespace + +sk_sp SkMakeCropImageFilter(const SkRect& rect, sk_sp input) { + if (!rect.isFinite()) { + return nullptr; + } + return sk_sp(new SkCropImageFilter(rect, std::move(input))); +} + +void SkRegisterCropImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkCropImageFilter); +} + +sk_sp SkCropImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkRect cropRect = buffer.readRect(); + if (!buffer.isValid() || !buffer.validate(SkIsValidRect(cropRect))) { + return nullptr; + } + return SkMakeCropImageFilter(cropRect, common.getInput(0)); +} + +void SkCropImageFilter::flatten(SkWriteBuffer& buffer) const { + this->SkImageFilter_Base::flatten(buffer); + buffer.writeRect(SkRect(fCropRect)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +skif::FilterResult SkCropImageFilter::onFilterImage(const skif::Context& context) const { + skif::LayerSpace cropBounds = this->cropRect(context.mapping()); + if (cropBounds.isEmpty()) { + // Don't bother evaluating the input filter if the crop wouldn't show anything + return {}; + } + + skif::FilterResult childOutput = this->filterInput(0, context); + // While filterInput() adjusts the context passed to our child filter to account for the + // crop rect and desired output, 'childOutput' does not necessarily fit that exactly. Calling + // applyCrop() ensures this is true, optimally avoiding rendering a new image if possible. + return childOutput.applyCrop(context, cropBounds); +} + +// TODO(michaelludwig) - onGetInputLayerBounds() and onGetOutputLayerBounds() are tightly coupled +// to both each other's behavior and to onFilterImage(). If onFilterImage() had a concept of a +// dry-run (e.g. FilterResult had null images but tracked the bounds the images would be) then +// onGetInputLayerBounds() is the union of all requested inputs at the leaf nodes of the DAG, and +// onGetOutputLayerBounds() is the bounds of the dry-run result. This might have more overhead, but +// would reduce the complexity of implementations by quite a bit. +skif::LayerSpace SkCropImageFilter::onGetInputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds, + VisitChildren recurse) const { + // Assuming unbounded desired output, this filter only needs to process an image that's at most + // sized to our crop rect. + skif::LayerSpace requiredInput = this->cropRect(mapping); + // But we can restrict the crop rect to just what's requested, since anything beyond that won't + // be rendered. + if (!requiredInput.intersect(desiredOutput)) { + // We wouldn't draw anything when filtering, so return empty bounds now to skip a layer. + return skif::LayerSpace::Empty(); + } + + if (recurse == VisitChildren::kNo) { + return requiredInput; + } else { + // Our required input is the desired output for our child image filter. + return this->visitInputLayerBounds(mapping, requiredInput, contentBounds); + } +} + +skif::LayerSpace SkCropImageFilter::onGetOutputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& contentBounds) const { + // Assuming unbounded child content, our output is a decal-tiled image sized to our crop rect. + skif::LayerSpace output = this->cropRect(mapping); + // But the child output image is drawn into our output surface with its own decal tiling, which + // may allow the output dimensions to be reduced. + skif::LayerSpace childOutput = this->visitOutputLayerBounds(mapping, contentBounds); + + if (output.intersect(childOutput)) { + return output; + } else { + // Nothing would be drawn into our crop rect, so nothing would be output. + return skif::LayerSpace::Empty(); + } +} + +SkRect SkCropImageFilter::computeFastBounds(const SkRect& bounds) const { + // TODO(michaelludwig) - This is conceptually very similar to calling onGetOutputLayerBounds() + // with an identity skif::Mapping (hence why fCropRect can be used directly), but it also does + // not involve any rounding to pixels for both the content bounds or the output. + // FIXME(michaelludwig) - There is a limitation in the current system for "fast bounds", since + // there's no way for the crop image filter to hide the fact that a child affects transparent + // black, so the entire DAG still is treated as if it cannot compute fast bounds. If we migrate + // getOutputLayerBounds() to operate on float rects, and to report infinite bounds for + // nodes that affect transparent black, then fastBounds() and onAffectsTransparentBlack() impls + // can go away entirely. That's not feasible until everything else is migrated onto the new crop + // rect filter and the new APIs. + if (this->getInput(0) && !this->getInput(0)->canComputeFastBounds()) { + // The input bounds to the crop are effectively infinite so the output fills the crop rect. + return SkRect(fCropRect); + } + + SkRect inputBounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(bounds) : bounds; + if (!inputBounds.intersect(SkRect(fCropRect))) { + return SkRect::MakeEmpty(); + } + return inputBounds; +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkCropImageFilter.h b/gfx/skia/skia/src/effects/imagefilters/SkCropImageFilter.h new file mode 100644 index 0000000000..8901a677b2 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkCropImageFilter.h @@ -0,0 +1,20 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkCropImageFilter_DEFINED +#define SkCropImageFilter_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkImageFilter; +struct SkRect; + +// TODO (michaelludwig): Move to SkImageFilters::Crop when ready to expose to the public +SK_API sk_sp SkMakeCropImageFilter(const SkRect& rect, sk_sp input); + +#endif diff --git a/gfx/skia/skia/src/effects/imagefilters/SkDisplacementMapImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkDisplacementMapImageFilter.cpp new file mode 100644 index 0000000000..5a8d10e816 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkDisplacementMapImageFilter.cpp @@ -0,0 +1,600 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorType.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/effects/SkImageFilters.h" +#include "include/private/SkSLSampleUsage.h" +#include "include/private/base/SkSafe32.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkSLTypeShared.h" +#include "src/gpu/KeyBuilder.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProcessorUnitTest.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSamplerState.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h" +#include "src/gpu/ganesh/glsl/GrGLSLProgramDataManager.h" +#include "src/gpu/ganesh/glsl/GrGLSLUniformHandler.h" + +struct GrShaderCaps; +#endif + +#if GR_TEST_UTILS +#include "src/base/SkRandom.h" +#endif + +namespace { + +class SkDisplacementMapImageFilter final : public SkImageFilter_Base { +public: + SkDisplacementMapImageFilter(SkColorChannel xChannelSelector, SkColorChannel yChannelSelector, + SkScalar scale, sk_sp inputs[2], + const SkRect* cropRect) + : INHERITED(inputs, 2, cropRect) + , fXChannelSelector(xChannelSelector) + , fYChannelSelector(yChannelSelector) + , fScale(scale) {} + + SkRect computeFastBounds(const SkRect& src) const override; + + SkIRect onFilterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + +protected: + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + + void flatten(SkWriteBuffer&) const override; + +private: + friend void ::SkRegisterDisplacementMapImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkDisplacementMapImageFilter) + + SkColorChannel fXChannelSelector; + SkColorChannel fYChannelSelector; + SkScalar fScale; + + const SkImageFilter* getDisplacementInput() const { return getInput(0); } + const SkImageFilter* getColorInput() const { return getInput(1); } + + using INHERITED = SkImageFilter_Base; +}; + +// Shift values to extract channels from an SkColor (SkColorGetR, SkColorGetG, etc) +const uint8_t gChannelTypeToShift[] = { + 16, // R + 8, // G + 0, // B + 24, // A +}; +struct Extractor { + Extractor(SkColorChannel typeX, + SkColorChannel typeY) + : fShiftX(gChannelTypeToShift[static_cast(typeX)]) + , fShiftY(gChannelTypeToShift[static_cast(typeY)]) + {} + + unsigned fShiftX, fShiftY; + + unsigned getX(SkColor c) const { return (c >> fShiftX) & 0xFF; } + unsigned getY(SkColor c) const { return (c >> fShiftY) & 0xFF; } +}; + +static bool channel_selector_type_is_valid(SkColorChannel cst) { + switch (cst) { + case SkColorChannel::kR: + case SkColorChannel::kG: + case SkColorChannel::kB: + case SkColorChannel::kA: + return true; + default: + break; + } + return false; +} + +} // anonymous namespace + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImageFilters::DisplacementMap( + SkColorChannel xChannelSelector, SkColorChannel yChannelSelector, SkScalar scale, + sk_sp displacement, sk_sp color, const CropRect& cropRect) { + if (!channel_selector_type_is_valid(xChannelSelector) || + !channel_selector_type_is_valid(yChannelSelector)) { + return nullptr; + } + + sk_sp inputs[2] = { std::move(displacement), std::move(color) }; + return sk_sp(new SkDisplacementMapImageFilter(xChannelSelector, yChannelSelector, + scale, inputs, cropRect)); +} + +void SkRegisterDisplacementMapImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkDisplacementMapImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkDisplacementMapEffect", SkDisplacementMapImageFilter::CreateProc); + SkFlattenable::Register("SkDisplacementMapEffectImpl", + SkDisplacementMapImageFilter::CreateProc); +} + +sk_sp SkDisplacementMapImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2); + + SkColorChannel xsel = buffer.read32LE(SkColorChannel::kLastEnum); + SkColorChannel ysel = buffer.read32LE(SkColorChannel::kLastEnum); + SkScalar scale = buffer.readScalar(); + + return SkImageFilters::DisplacementMap(xsel, ysel, scale, common.getInput(0), + common.getInput(1), common.cropRect()); +} + +void SkDisplacementMapImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeInt((int) fXChannelSelector); + buffer.writeInt((int) fYChannelSelector); + buffer.writeScalar(fScale); +} + +/////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +namespace { + +class GrDisplacementMapEffect : public GrFragmentProcessor { +public: + static std::unique_ptr Make(SkColorChannel xChannelSelector, + SkColorChannel yChannelSelector, + SkVector scale, + GrSurfaceProxyView displacement, + const SkIRect& displSubset, + const SkMatrix& offsetMatrix, + GrSurfaceProxyView color, + const SkIRect& colorSubset, + const GrCaps&); + + ~GrDisplacementMapEffect() override; + + const char* name() const override { return "DisplacementMap"; } + + std::unique_ptr clone() const override; + +private: + class Impl; + + explicit GrDisplacementMapEffect(const GrDisplacementMapEffect&); + + std::unique_ptr onMakeProgramImpl() const override; + + void onAddToKey(const GrShaderCaps&, skgpu::KeyBuilder*) const override; + + bool onIsEqual(const GrFragmentProcessor&) const override; + + GrDisplacementMapEffect(SkColorChannel xChannelSelector, + SkColorChannel yChannelSelector, + const SkVector& scale, + std::unique_ptr displacement, + std::unique_ptr color); + + GR_DECLARE_FRAGMENT_PROCESSOR_TEST + + SkColorChannel fXChannelSelector; + SkColorChannel fYChannelSelector; + SkVector fScale; + + using INHERITED = GrFragmentProcessor; +}; + +} // anonymous namespace +#endif + +static void compute_displacement(Extractor ex, const SkVector& scale, SkBitmap* dst, + const SkBitmap& displ, const SkIPoint& offset, + const SkBitmap& src, + const SkIRect& bounds) { + static const SkScalar Inv8bit = SkScalarInvert(255); + const int srcW = src.width(); + const int srcH = src.height(); + const SkVector scaleForColor = SkVector::Make(scale.fX * Inv8bit, scale.fY * Inv8bit); + const SkVector scaleAdj = SkVector::Make(SK_ScalarHalf - scale.fX * SK_ScalarHalf, + SK_ScalarHalf - scale.fY * SK_ScalarHalf); + SkPMColor* dstPtr = dst->getAddr32(0, 0); + for (int y = bounds.top(); y < bounds.bottom(); ++y) { + const SkPMColor* displPtr = displ.getAddr32(bounds.left() + offset.fX, y + offset.fY); + for (int x = bounds.left(); x < bounds.right(); ++x, ++displPtr) { + SkColor c = SkUnPreMultiply::PMColorToColor(*displPtr); + + SkScalar displX = scaleForColor.fX * ex.getX(c) + scaleAdj.fX; + SkScalar displY = scaleForColor.fY * ex.getY(c) + scaleAdj.fY; + // Truncate the displacement values + const int32_t srcX = Sk32_sat_add(x, SkScalarTruncToInt(displX)); + const int32_t srcY = Sk32_sat_add(y, SkScalarTruncToInt(displY)); + *dstPtr++ = ((srcX < 0) || (srcX >= srcW) || (srcY < 0) || (srcY >= srcH)) ? + 0 : *(src.getAddr32(srcX, srcY)); + } + } +} + +sk_sp SkDisplacementMapImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint colorOffset = SkIPoint::Make(0, 0); + sk_sp color(this->filterInput(1, ctx, &colorOffset)); + if (!color) { + return nullptr; + } + + SkIPoint displOffset = SkIPoint::Make(0, 0); + // Creation of the displacement map should happen in a non-colorspace aware context. This + // texture is a purely mathematical construct, so we want to just operate on the stored + // values. Consider: + // User supplies an sRGB displacement map. If we're rendering to a wider gamut, then we could + // end up filtering the displacement map into that gamut, which has the effect of reducing + // the amount of displacement that it represents (as encoded values move away from the + // primaries). + // With a more complex DAG attached to this input, it's not clear that working in ANY specific + // color space makes sense, so we ignore color spaces (and gamma) entirely. This may not be + // ideal, but it's at least consistent and predictable. + Context displContext(ctx.mapping(), ctx.desiredOutput(), ctx.cache(), + kN32_SkColorType, nullptr, ctx.source()); + sk_sp displ(this->filterInput(0, displContext, &displOffset)); + if (!displ) { + return nullptr; + } + + const SkIRect srcBounds = SkIRect::MakeXYWH(colorOffset.x(), colorOffset.y(), + color->width(), color->height()); + + // Both paths do bounds checking on color pixel access, we don't need to + // pad the color bitmap to bounds here. + SkIRect bounds; + if (!this->applyCropRect(ctx, srcBounds, &bounds)) { + return nullptr; + } + + SkIRect displBounds; + displ = this->applyCropRectAndPad(ctx, displ.get(), &displOffset, &displBounds); + if (!displ) { + return nullptr; + } + + if (!bounds.intersect(displBounds)) { + return nullptr; + } + + const SkIRect colorBounds = bounds.makeOffset(-colorOffset); + // If the offset overflowed (saturated) then we have to abort, as we need their + // dimensions to be equal. See https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=7209 + if (colorBounds.size() != bounds.size()) { + return nullptr; + } + + SkVector scale = SkVector::Make(fScale, fScale); + ctx.ctm().mapVectors(&scale, 1); + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + auto rContext = ctx.getContext(); + + GrSurfaceProxyView colorView = color->view(rContext); + GrSurfaceProxyView displView = displ->view(rContext); + if (!colorView.proxy() || !displView.proxy()) { + return nullptr; + } + const auto isProtected = colorView.proxy()->isProtected(); + + SkMatrix offsetMatrix = SkMatrix::Translate(SkIntToScalar(colorOffset.fX - displOffset.fX), + SkIntToScalar(colorOffset.fY - displOffset.fY)); + + std::unique_ptr fp = + GrDisplacementMapEffect::Make(fXChannelSelector, + fYChannelSelector, + scale, + std::move(displView), + displ->subset(), + offsetMatrix, + std::move(colorView), + color->subset(), + *rContext->priv().caps()); + fp = GrColorSpaceXformEffect::Make(std::move(fp), + color->getColorSpace(), color->alphaType(), + ctx.colorSpace(), kPremul_SkAlphaType); + GrImageInfo info(ctx.grColorType(), + kPremul_SkAlphaType, + ctx.refColorSpace(), + bounds.size()); + auto sfc = rContext->priv().makeSFC(info, + "DisplacementMapImageFilter_FilterImage", + SkBackingFit::kApprox, + 1, + GrMipmapped::kNo, + isProtected, + kBottomLeft_GrSurfaceOrigin); + if (!sfc) { + return nullptr; + } + + sfc->fillRectToRectWithFP(colorBounds, + SkIRect::MakeSize(colorBounds.size()), + std::move(fp)); + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + return SkSpecialImage::MakeDeferredFromGpu(rContext, + SkIRect::MakeWH(bounds.width(), bounds.height()), + kNeedNewImageUniqueID_SpecialImage, + sfc->readSurfaceView(), + sfc->colorInfo(), + ctx.surfaceProps()); + } +#endif + + SkBitmap colorBM, displBM; + + if (!color->getROPixels(&colorBM) || !displ->getROPixels(&displBM)) { + return nullptr; + } + + if ((colorBM.colorType() != kN32_SkColorType) || + (displBM.colorType() != kN32_SkColorType)) { + return nullptr; + } + + if (!colorBM.getPixels() || !displBM.getPixels()) { + return nullptr; + } + + SkImageInfo info = SkImageInfo::MakeN32(bounds.width(), bounds.height(), + colorBM.alphaType()); + + SkBitmap dst; + if (!dst.tryAllocPixels(info)) { + return nullptr; + } + + compute_displacement(Extractor(fXChannelSelector, fYChannelSelector), scale, &dst, + displBM, colorOffset - displOffset, colorBM, colorBounds); + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()), + dst, ctx.surfaceProps()); +} + +SkRect SkDisplacementMapImageFilter::computeFastBounds(const SkRect& src) const { + SkRect bounds = this->getColorInput() ? this->getColorInput()->computeFastBounds(src) : src; + bounds.outset(SkScalarAbs(fScale) * SK_ScalarHalf, SkScalarAbs(fScale) * SK_ScalarHalf); + return bounds; +} + +SkIRect SkDisplacementMapImageFilter::onFilterNodeBounds( + const SkIRect& src, const SkMatrix& ctm, MapDirection, const SkIRect* inputRect) const { + SkVector scale = SkVector::Make(fScale, fScale); + ctm.mapVectors(&scale, 1); + return src.makeOutset(SkScalarCeilToInt(SkScalarAbs(scale.fX) * SK_ScalarHalf), + SkScalarCeilToInt(SkScalarAbs(scale.fY) * SK_ScalarHalf)); +} + +SkIRect SkDisplacementMapImageFilter::onFilterBounds( + const SkIRect& src, const SkMatrix& ctm, MapDirection dir, const SkIRect* inputRect) const { + if (kReverse_MapDirection == dir) { + return INHERITED::onFilterBounds(src, ctm, dir, inputRect); + } + // Recurse only into color input. + if (this->getColorInput()) { + return this->getColorInput()->filterBounds(src, ctm, dir, inputRect); + } + return src; +} + +/////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) +class GrDisplacementMapEffect::Impl : public ProgramImpl { +public: + void emitCode(EmitArgs&) override; + +private: + void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override; + + typedef GrGLSLProgramDataManager::UniformHandle UniformHandle; + + UniformHandle fScaleUni; +}; + +/////////////////////////////////////////////////////////////////////////////// + +std::unique_ptr GrDisplacementMapEffect::Make(SkColorChannel xChannelSelector, + SkColorChannel yChannelSelector, + SkVector scale, + GrSurfaceProxyView displacement, + const SkIRect& displSubset, + const SkMatrix& offsetMatrix, + GrSurfaceProxyView color, + const SkIRect& colorSubset, + const GrCaps& caps) { + static constexpr GrSamplerState kColorSampler(GrSamplerState::WrapMode::kClampToBorder, + GrSamplerState::Filter::kNearest); + auto colorEffect = GrTextureEffect::MakeSubset(std::move(color), + kPremul_SkAlphaType, + SkMatrix::Translate(colorSubset.topLeft()), + kColorSampler, + SkRect::Make(colorSubset), + caps); + + auto dispM = SkMatrix::Concat(SkMatrix::Translate(displSubset.topLeft()), offsetMatrix); + auto dispEffect = GrTextureEffect::Make(std::move(displacement), + kPremul_SkAlphaType, + dispM, + GrSamplerState::Filter::kNearest); + + return std::unique_ptr( + new GrDisplacementMapEffect(xChannelSelector, + yChannelSelector, + scale, + std::move(dispEffect), + std::move(colorEffect))); +} + +std::unique_ptr +GrDisplacementMapEffect::onMakeProgramImpl() const { + return std::make_unique(); +} + +void GrDisplacementMapEffect::onAddToKey(const GrShaderCaps& caps, skgpu::KeyBuilder* b) const { + static constexpr int kChannelSelectorKeyBits = 2; // Max value is 3, so 2 bits are required + + uint32_t xKey = static_cast(fXChannelSelector); + uint32_t yKey = static_cast(fYChannelSelector) << kChannelSelectorKeyBits; + + b->add32(xKey | yKey); +} + +GrDisplacementMapEffect::GrDisplacementMapEffect(SkColorChannel xChannelSelector, + SkColorChannel yChannelSelector, + const SkVector& scale, + std::unique_ptr displacement, + std::unique_ptr color) + : INHERITED(kGrDisplacementMapEffect_ClassID, GrFragmentProcessor::kNone_OptimizationFlags) + , fXChannelSelector(xChannelSelector) + , fYChannelSelector(yChannelSelector) + , fScale(scale) { + this->registerChild(std::move(displacement)); + this->registerChild(std::move(color), SkSL::SampleUsage::Explicit()); + this->setUsesSampleCoordsDirectly(); +} + +GrDisplacementMapEffect::GrDisplacementMapEffect(const GrDisplacementMapEffect& that) + : INHERITED(that) + , fXChannelSelector(that.fXChannelSelector) + , fYChannelSelector(that.fYChannelSelector) + , fScale(that.fScale) {} + +GrDisplacementMapEffect::~GrDisplacementMapEffect() {} + +std::unique_ptr GrDisplacementMapEffect::clone() const { + return std::unique_ptr(new GrDisplacementMapEffect(*this)); +} + +bool GrDisplacementMapEffect::onIsEqual(const GrFragmentProcessor& sBase) const { + const GrDisplacementMapEffect& s = sBase.cast(); + return fXChannelSelector == s.fXChannelSelector && + fYChannelSelector == s.fYChannelSelector && + fScale == s.fScale; +} + +/////////////////////////////////////////////////////////////////////////////// + +GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrDisplacementMapEffect) + +#if GR_TEST_UTILS +std::unique_ptr GrDisplacementMapEffect::TestCreate(GrProcessorTestData* d) { + auto [dispView, ct1, at1] = d->randomView(); + auto [colorView, ct2, at2] = d->randomView(); + static const int kMaxComponent = static_cast(SkColorChannel::kLastEnum); + SkColorChannel xChannelSelector = + static_cast(d->fRandom->nextRangeU(1, kMaxComponent)); + SkColorChannel yChannelSelector = + static_cast(d->fRandom->nextRangeU(1, kMaxComponent)); + SkVector scale; + scale.fX = d->fRandom->nextRangeScalar(0, 100.0f); + scale.fY = d->fRandom->nextRangeScalar(0, 100.0f); + SkISize colorDimensions; + colorDimensions.fWidth = d->fRandom->nextRangeU(0, colorView.width()); + colorDimensions.fHeight = d->fRandom->nextRangeU(0, colorView.height()); + SkIRect dispRect = SkIRect::MakeSize(dispView.dimensions()); + + return GrDisplacementMapEffect::Make(xChannelSelector, + yChannelSelector, + scale, + std::move(dispView), + dispRect, + SkMatrix::I(), + std::move(colorView), + SkIRect::MakeSize(colorDimensions), + *d->caps()); +} + +#endif + +/////////////////////////////////////////////////////////////////////////////// + +void GrDisplacementMapEffect::Impl::emitCode(EmitArgs& args) { + const GrDisplacementMapEffect& displacementMap = args.fFp.cast(); + + fScaleUni = args.fUniformHandler->addUniform(&displacementMap, kFragment_GrShaderFlag, + SkSLType::kHalf2, "Scale"); + const char* scaleUni = args.fUniformHandler->getUniformCStr(fScaleUni); + + GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; + SkString displacementSample = this->invokeChild(/*childIndex=*/0, args); + fragBuilder->codeAppendf("half4 dColor = unpremul(%s);", displacementSample.c_str()); + + auto chanChar = [](SkColorChannel c) { + switch(c) { + case SkColorChannel::kR: return 'r'; + case SkColorChannel::kG: return 'g'; + case SkColorChannel::kB: return 'b'; + case SkColorChannel::kA: return 'a'; + default: SkUNREACHABLE; + } + }; + fragBuilder->codeAppendf("float2 cCoords = %s + %s * (dColor.%c%c - half2(0.5));", + args.fSampleCoord, + scaleUni, + chanChar(displacementMap.fXChannelSelector), + chanChar(displacementMap.fYChannelSelector)); + + SkString colorSample = this->invokeChild(/*childIndex=*/1, args, "cCoords"); + + fragBuilder->codeAppendf("return %s;", colorSample.c_str()); +} + +void GrDisplacementMapEffect::Impl::onSetData(const GrGLSLProgramDataManager& pdman, + const GrFragmentProcessor& proc) { + const auto& displacementMap = proc.cast(); + pdman.set2f(fScaleUni, displacementMap.fScale.x(), displacementMap.fScale.y()); +} +#endif diff --git a/gfx/skia/skia/src/effects/imagefilters/SkDropShadowImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkDropShadowImageFilter.cpp new file mode 100644 index 0000000000..3f9842017e --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkDropShadowImageFilter.cpp @@ -0,0 +1,205 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include + +namespace { + +class SkDropShadowImageFilter final : public SkImageFilter_Base { +public: + SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, + SkColor color, bool shadowOnly, sk_sp input, + const SkRect* cropRect) + : INHERITED(&input, 1, cropRect) + , fDx(dx) + , fDy(dy) + , fSigmaX(sigmaX) + , fSigmaY(sigmaY) + , fColor(color) + , fShadowOnly(shadowOnly) {} + + static sk_sp Make(SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, + SkColor color, bool shadowOnly, sk_sp input, + const SkRect* cropRect) { + return sk_sp(new SkDropShadowImageFilter( + dx, dy, sigmaX, sigmaY, color, shadowOnly, std::move(input), cropRect)); + } + + SkRect computeFastBounds(const SkRect&) const override; + +protected: + void flatten(SkWriteBuffer&) const override; + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + +private: + friend void ::SkRegisterDropShadowImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkDropShadowImageFilter) + + SkScalar fDx, fDy, fSigmaX, fSigmaY; + SkColor fColor; + bool fShadowOnly; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::DropShadow( + SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor color, + sk_sp input, const CropRect& cropRect) { + return SkDropShadowImageFilter::Make(dx, dy, sigmaX, sigmaY, color, /* shadowOnly */ false, + std::move(input), cropRect); +} + +sk_sp SkImageFilters::DropShadowOnly( + SkScalar dx, SkScalar dy, SkScalar sigmaX, SkScalar sigmaY, SkColor color, + sk_sp input, const CropRect& cropRect) { + return SkDropShadowImageFilter::Make(dx, dy, sigmaX, sigmaY, color, /* shadowOnly */ true, + std::move(input), cropRect); +} + +void SkRegisterDropShadowImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkDropShadowImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkDropShadowImageFilterImpl", SkDropShadowImageFilter::CreateProc); +} + +sk_sp SkDropShadowImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkScalar dx = buffer.readScalar(); + SkScalar dy = buffer.readScalar(); + SkScalar sigmaX = buffer.readScalar(); + SkScalar sigmaY = buffer.readScalar(); + SkColor color = buffer.readColor(); + + // For backwards compatibility, the shadow mode had been saved as an enum cast to a 32LE int, + // where shadow-and-foreground was 0 and shadow-only was 1. Other than the number of bits, this + // is equivalent to the bool that SkDropShadowImageFilter now uses. + bool shadowOnly = SkToBool(buffer.read32LE(1)); + return SkDropShadowImageFilter::Make(dx, dy, sigmaX, sigmaY, color, shadowOnly, + common.getInput(0), common.cropRect()); +} + +void SkDropShadowImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeScalar(fDx); + buffer.writeScalar(fDy); + buffer.writeScalar(fSigmaX); + buffer.writeScalar(fSigmaY); + buffer.writeColor(fColor); + // See CreateProc, but we save the bool as an int to match previous enum serialization. + buffer.writeInt(fShadowOnly); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkDropShadowImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(), + input->width(), input->height()); + SkIRect bounds; + if (!this->applyCropRect(ctx, inputBounds, &bounds)) { + return nullptr; + } + + sk_sp surf(ctx.makeSurface(bounds.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + canvas->clear(0x0); + + SkVector sigma = SkVector::Make(fSigmaX, fSigmaY); + ctx.ctm().mapVectors(&sigma, 1); + sigma.fX = SkScalarAbs(sigma.fX); + sigma.fY = SkScalarAbs(sigma.fY); + + SkPaint paint; + paint.setAntiAlias(true); + paint.setImageFilter(SkImageFilters::Blur(sigma.fX, sigma.fY, nullptr)); + paint.setColorFilter(SkColorFilters::Blend(fColor, SkBlendMode::kSrcIn)); + + SkVector offsetVec = SkVector::Make(fDx, fDy); + ctx.ctm().mapVectors(&offsetVec, 1); + + canvas->translate(SkIntToScalar(inputOffset.fX) - SkIntToScalar(bounds.fLeft), + SkIntToScalar(inputOffset.fY) - SkIntToScalar(bounds.fTop)); + input->draw(canvas, offsetVec.fX, offsetVec.fY, SkSamplingOptions(), &paint); + + if (!fShadowOnly) { + input->draw(canvas, 0, 0); + } + offset->fX = bounds.fLeft; + offset->fY = bounds.fTop; + return surf->makeImageSnapshot(); +} + +SkRect SkDropShadowImageFilter::computeFastBounds(const SkRect& src) const { + SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src; + SkRect shadowBounds = bounds; + shadowBounds.offset(fDx, fDy); + shadowBounds.outset(fSigmaX * 3, fSigmaY * 3); + if (!fShadowOnly) { + bounds.join(shadowBounds); + } else { + bounds = shadowBounds; + } + return bounds; +} + +SkIRect SkDropShadowImageFilter::onFilterNodeBounds( + const SkIRect& src, const SkMatrix& ctm, MapDirection dir, const SkIRect* inputRect) const { + SkVector offsetVec = SkVector::Make(fDx, fDy); + if (kReverse_MapDirection == dir) { + offsetVec.negate(); + } + ctm.mapVectors(&offsetVec, 1); + SkIRect dst = src.makeOffset(SkScalarCeilToInt(offsetVec.x()), + SkScalarCeilToInt(offsetVec.y())); + SkVector sigma = SkVector::Make(fSigmaX, fSigmaY); + ctm.mapVectors(&sigma, 1); + dst.outset( + SkScalarCeilToInt(SkScalarAbs(sigma.x() * 3)), + SkScalarCeilToInt(SkScalarAbs(sigma.y() * 3))); + if (!fShadowOnly) { + dst.join(src); + } + return dst; +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkImageImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkImageImageFilter.cpp new file mode 100644 index 0000000000..66ecf66052 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkImageImageFilter.cpp @@ -0,0 +1,183 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSamplingPriv.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include + +namespace { + +class SkImageImageFilter final : public SkImageFilter_Base { +public: + SkImageImageFilter(sk_sp image, const SkRect& srcRect, const SkRect& dstRect, + const SkSamplingOptions& sampling) + : INHERITED(nullptr, 0, nullptr) + , fImage(std::move(image)) + , fSrcRect(srcRect) + , fDstRect(dstRect) + , fSampling(sampling) {} + + SkRect computeFastBounds(const SkRect& src) const override; + +protected: + void flatten(SkWriteBuffer&) const override; + + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + + SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + + MatrixCapability onGetCTMCapability() const override { return MatrixCapability::kComplex; } + +private: + friend void ::SkRegisterImageImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkImageImageFilter) + + sk_sp fImage; + SkRect fSrcRect, fDstRect; + SkSamplingOptions fSampling; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Image(sk_sp image, + const SkRect& srcRect, + const SkRect& dstRect, + const SkSamplingOptions& sampling) { + if (!image || srcRect.width() <= 0.0f || srcRect.height() <= 0.0f) { + return nullptr; + } + + return sk_sp(new SkImageImageFilter( + std::move(image), srcRect, dstRect, sampling)); +} + +void SkRegisterImageImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkImageImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkImageSourceImpl", SkImageImageFilter::CreateProc); +} + +sk_sp SkImageImageFilter::CreateProc(SkReadBuffer& buffer) { + SkSamplingOptions sampling; + if (buffer.isVersionLT(SkPicturePriv::kImageFilterImageSampling_Version)) { + sampling = SkSamplingPriv::FromFQ(buffer.checkFilterQuality(), kLinear_SkMediumAs); + } else { + sampling = buffer.readSampling(); + } + + SkRect src, dst; + buffer.readRect(&src); + buffer.readRect(&dst); + + sk_sp image(buffer.readImage()); + if (!image) { + return nullptr; + } + + return SkImageFilters::Image(std::move(image), src, dst, sampling); +} + +void SkImageImageFilter::flatten(SkWriteBuffer& buffer) const { + buffer.writeSampling(fSampling); + buffer.writeRect(fSrcRect); + buffer.writeRect(fDstRect); + buffer.writeImage(fImage.get()); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImageImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + const SkRect dstBounds = ctx.ctm().mapRect(fDstRect); + const SkIRect dstIBounds = dstBounds.roundOut(); + + // Quick check to see if we can return the image directly, which can be done if the transform + // ends up being an integer translate and sampling would have no effect on the output. + // TODO: This currently means cubic sampling can be skipped, even though it would change results + // for integer translation draws. + // TODO: This is prone to false negatives due to the floating point math; we could probably + // get away with dimensions and translates being epsilon close to integers. + const bool passthroughTransform = ctx.ctm().isScaleTranslate() && + ctx.ctm().getScaleX() > 0.f && + ctx.ctm().getScaleY() > 0.f; + const bool passthroughSrcOffsets = SkScalarIsInt(fSrcRect.fLeft) && + SkScalarIsInt(fSrcRect.fTop); + const bool passthroughDstOffsets = SkScalarIsInt(dstBounds.fLeft) && + SkScalarIsInt(dstBounds.fTop); + const bool passthroughDims = + SkScalarIsInt(fSrcRect.width()) && fSrcRect.width() == dstBounds.width() && + SkScalarIsInt(fSrcRect.height()) && fSrcRect.height() == dstBounds.height(); + + if (passthroughTransform && passthroughSrcOffsets && passthroughDstOffsets && passthroughDims) { + // Can pass through fImage directly, applying the dst's location to 'offset'. If fSrcRect + // extends outside of the image, we adjust dst to match since those areas would have been + // transparent black anyways. + SkIRect srcIBounds = fSrcRect.roundOut(); + SkIPoint srcOffset = srcIBounds.topLeft(); + if (!srcIBounds.intersect(SkIRect::MakeWH(fImage->width(), fImage->height()))) { + return nullptr; + } + + *offset = dstIBounds.topLeft() + srcIBounds.topLeft() - srcOffset; + return SkSpecialImage::MakeFromImage(ctx.getContext(), srcIBounds, fImage, + ctx.surfaceProps()); + } + + sk_sp surf(ctx.makeSurface(dstIBounds.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + // Subtract off the integer component of the translation (will be applied in offset, below). + canvas->translate(-dstIBounds.fLeft, -dstIBounds.fTop); + canvas->concat(ctx.ctm()); + // TODO(skbug.com/5075): Canvases from GPU special surfaces come with unitialized content + canvas->clear(SK_ColorTRANSPARENT); + canvas->drawImageRect(fImage.get(), fSrcRect, fDstRect, fSampling, nullptr, + SkCanvas::kStrict_SrcRectConstraint); + + *offset = dstIBounds.topLeft(); + return surf->makeImageSnapshot(); +} + +SkRect SkImageImageFilter::computeFastBounds(const SkRect& src) const { + return fDstRect; +} + +SkIRect SkImageImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection direction, + const SkIRect* inputRect) const { + if (kReverse_MapDirection == direction) { + return INHERITED::onFilterNodeBounds(src, ctm, direction, inputRect); + } + + SkRect dstRect = fDstRect; + ctm.mapRect(&dstRect); + return dstRect.roundOut(); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkLightingImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkLightingImageFilter.cpp new file mode 100644 index 0000000000..990efdb2b7 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkLightingImageFilter.cpp @@ -0,0 +1,2190 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorPriv.h" +#include "include/core/SkColorType.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkPoint3.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTPin.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/private/SkSLSampleUsage.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkSLTypeShared.h" +#include "src/gpu/KeyBuilder.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProcessorUnitTest.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSamplerState.h" +#include "src/gpu/ganesh/GrShaderVar.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h" +#include "src/gpu/ganesh/glsl/GrGLSLProgramDataManager.h" +#include "src/gpu/ganesh/glsl/GrGLSLUniformHandler.h" + +struct GrShaderCaps; + +// For brevity +typedef GrGLSLProgramDataManager::UniformHandle UniformHandle; +#endif + +#if GR_TEST_UTILS +#include "src/base/SkRandom.h" +#endif + +const SkScalar gOneThird = SkIntToScalar(1) / 3; +const SkScalar gTwoThirds = SkIntToScalar(2) / 3; +const SkScalar gOneHalf = 0.5f; +const SkScalar gOneQuarter = 0.25f; + +#if defined(SK_GANESH) +static void setUniformPoint3(const GrGLSLProgramDataManager& pdman, UniformHandle uni, + const SkPoint3& point) { + static_assert(sizeof(SkPoint3) == 3 * sizeof(float)); + pdman.set3fv(uni, 1, &point.fX); +} + +static void setUniformNormal3(const GrGLSLProgramDataManager& pdman, UniformHandle uni, + const SkPoint3& point) { + setUniformPoint3(pdman, uni, point); +} +#endif + +// Shift matrix components to the left, as we advance pixels to the right. +static inline void shiftMatrixLeft(int m[9]) { + m[0] = m[1]; + m[3] = m[4]; + m[6] = m[7]; + m[1] = m[2]; + m[4] = m[5]; + m[7] = m[8]; +} + +static inline void fast_normalize(SkPoint3* vector) { + // add a tiny bit so we don't have to worry about divide-by-zero + SkScalar magSq = vector->dot(*vector) + SK_ScalarNearlyZero; +#if defined(_MSC_VER) && _MSC_VER >= 1920 + // Visual Studio 2019 has some kind of code-generation bug in release builds involving the + // lighting math in this file. Using the portable rsqrt avoids the issue. This issue appears + // to be specific to the collection of (inline) functions in this file that call into this + // function, not with sk_float_rsqrt itself. + SkScalar scale = sk_float_rsqrt_portable(magSq); +#else + SkScalar scale = sk_float_rsqrt(magSq); +#endif + vector->fX *= scale; + vector->fY *= scale; + vector->fZ *= scale; +} + +static SkPoint3 read_point3(SkReadBuffer& buffer) { + SkPoint3 point; + point.fX = buffer.readScalar(); + point.fY = buffer.readScalar(); + point.fZ = buffer.readScalar(); + buffer.validate(SkScalarIsFinite(point.fX) && + SkScalarIsFinite(point.fY) && + SkScalarIsFinite(point.fZ)); + return point; +} + +static void write_point3(const SkPoint3& point, SkWriteBuffer& buffer) { + buffer.writeScalar(point.fX); + buffer.writeScalar(point.fY); + buffer.writeScalar(point.fZ); +} + +namespace { +class GpuLight; +class SkImageFilterLight : public SkRefCnt { +public: + enum LightType { + kDistant_LightType, + kPoint_LightType, + kSpot_LightType, + + kLast_LightType = kSpot_LightType + }; + virtual LightType type() const = 0; + const SkPoint3& color() const { return fColor; } + virtual std::unique_ptr createGpuLight() const = 0; + virtual bool isEqual(const SkImageFilterLight& other) const { + return fColor == other.fColor; + } + virtual SkImageFilterLight* transform(const SkMatrix& matrix) const = 0; + + // Defined below SkLight's subclasses. + void flattenLight(SkWriteBuffer& buffer) const; + static SkImageFilterLight* UnflattenLight(SkReadBuffer& buffer); + + virtual SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const = 0; + virtual SkPoint3 lightColor(const SkPoint3& surfaceToLight) const = 0; + +protected: + SkImageFilterLight(SkColor color) { + fColor = SkPoint3::Make(SkIntToScalar(SkColorGetR(color)), + SkIntToScalar(SkColorGetG(color)), + SkIntToScalar(SkColorGetB(color))); + } + SkImageFilterLight(const SkPoint3& color) : fColor(color) {} + + SkImageFilterLight(SkReadBuffer& buffer) { + fColor = read_point3(buffer); + } + + virtual void onFlattenLight(SkWriteBuffer& buffer) const = 0; + + +private: + using INHERITED = SkRefCnt; + SkPoint3 fColor; +}; + +class BaseLightingType { +public: + BaseLightingType() {} + virtual ~BaseLightingType() {} + + virtual SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, + const SkPoint3& lightColor) const= 0; +}; + +class DiffuseLightingType : public BaseLightingType { +public: + DiffuseLightingType(SkScalar kd) + : fKD(kd) {} + SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, + const SkPoint3& lightColor) const override { + SkScalar colorScale = fKD * normal.dot(surfaceTolight); + SkPoint3 color = lightColor.makeScale(colorScale); + return SkPackARGB32(255, + SkTPin(SkScalarRoundToInt(color.fX), 0, 255), + SkTPin(SkScalarRoundToInt(color.fY), 0, 255), + SkTPin(SkScalarRoundToInt(color.fZ), 0, 255)); + } +private: + SkScalar fKD; +}; + +static SkScalar max_component(const SkPoint3& p) { + return p.x() > p.y() ? (p.x() > p.z() ? p.x() : p.z()) : (p.y() > p.z() ? p.y() : p.z()); +} + +class SpecularLightingType : public BaseLightingType { +public: + SpecularLightingType(SkScalar ks, SkScalar shininess) + : fKS(ks), fShininess(shininess) {} + SkPMColor light(const SkPoint3& normal, const SkPoint3& surfaceTolight, + const SkPoint3& lightColor) const override { + SkPoint3 halfDir(surfaceTolight); + halfDir.fZ += SK_Scalar1; // eye position is always (0, 0, 1) + fast_normalize(&halfDir); + SkScalar colorScale = fKS * SkScalarPow(normal.dot(halfDir), fShininess); + SkPoint3 color = lightColor.makeScale(colorScale); + return SkPackARGB32(SkTPin(SkScalarRoundToInt(max_component(color)), 0, 255), + SkTPin(SkScalarRoundToInt(color.fX), 0, 255), + SkTPin(SkScalarRoundToInt(color.fY), 0, 255), + SkTPin(SkScalarRoundToInt(color.fZ), 0, 255)); + } +private: + SkScalar fKS; + SkScalar fShininess; +}; +} // anonymous namespace + +static inline SkScalar sobel(int a, int b, int c, int d, int e, int f, SkScalar scale) { + return (-a + b - 2 * c + 2 * d -e + f) * scale; +} + +static inline SkPoint3 pointToNormal(SkScalar x, SkScalar y, SkScalar surfaceScale) { + SkPoint3 vector = SkPoint3::Make(-x * surfaceScale, -y * surfaceScale, 1); + fast_normalize(&vector); + return vector; +} + +static inline SkPoint3 topLeftNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel(0, 0, m[4], m[5], m[7], m[8], gTwoThirds), + sobel(0, 0, m[4], m[7], m[5], m[8], gTwoThirds), + surfaceScale); +} + +static inline SkPoint3 topNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel( 0, 0, m[3], m[5], m[6], m[8], gOneThird), + sobel(m[3], m[6], m[4], m[7], m[5], m[8], gOneHalf), + surfaceScale); +} + +static inline SkPoint3 topRightNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel( 0, 0, m[3], m[4], m[6], m[7], gTwoThirds), + sobel(m[3], m[6], m[4], m[7], 0, 0, gTwoThirds), + surfaceScale); +} + +static inline SkPoint3 leftNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel(m[1], m[2], m[4], m[5], m[7], m[8], gOneHalf), + sobel( 0, 0, m[1], m[7], m[2], m[8], gOneThird), + surfaceScale); +} + + +static inline SkPoint3 interiorNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel(m[0], m[2], m[3], m[5], m[6], m[8], gOneQuarter), + sobel(m[0], m[6], m[1], m[7], m[2], m[8], gOneQuarter), + surfaceScale); +} + +static inline SkPoint3 rightNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel(m[0], m[1], m[3], m[4], m[6], m[7], gOneHalf), + sobel(m[0], m[6], m[1], m[7], 0, 0, gOneThird), + surfaceScale); +} + +static inline SkPoint3 bottomLeftNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel(m[1], m[2], m[4], m[5], 0, 0, gTwoThirds), + sobel( 0, 0, m[1], m[4], m[2], m[5], gTwoThirds), + surfaceScale); +} + +static inline SkPoint3 bottomNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel(m[0], m[2], m[3], m[5], 0, 0, gOneThird), + sobel(m[0], m[3], m[1], m[4], m[2], m[5], gOneHalf), + surfaceScale); +} + +static inline SkPoint3 bottomRightNormal(int m[9], SkScalar surfaceScale) { + return pointToNormal(sobel(m[0], m[1], m[3], m[4], 0, 0, gTwoThirds), + sobel(m[0], m[3], m[1], m[4], 0, 0, gTwoThirds), + surfaceScale); +} + +namespace { +class UncheckedPixelFetcher { +public: + static inline uint32_t Fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { + return SkGetPackedA32(*src.getAddr32(x, y)); + } +}; + +// The DecalPixelFetcher is used when the destination crop rect exceeds the input bitmap bounds. +class DecalPixelFetcher { +public: + static inline uint32_t Fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { + if (x < bounds.fLeft || x >= bounds.fRight || y < bounds.fTop || y >= bounds.fBottom) { + return 0; + } else { + return SkGetPackedA32(*src.getAddr32(x, y)); + } + } +}; +} // anonymous namespace + +template +static void lightBitmap(const BaseLightingType& lightingType, + const SkImageFilterLight* l, + const SkBitmap& src, + SkBitmap* dst, + SkScalar surfaceScale, + const SkIRect& bounds) { + SkASSERT(dst->width() == bounds.width() && dst->height() == bounds.height()); + int left = bounds.left(), right = bounds.right(); + int bottom = bounds.bottom(); + int y = bounds.top(); + SkIRect srcBounds = src.bounds(); + SkPMColor* dptr = dst->getAddr32(0, 0); + { + int x = left; + int m[9]; + m[4] = PixelFetcher::Fetch(src, x, y, srcBounds); + m[5] = PixelFetcher::Fetch(src, x + 1, y, srcBounds); + m[7] = PixelFetcher::Fetch(src, x, y + 1, srcBounds); + m[8] = PixelFetcher::Fetch(src, x + 1, y + 1, srcBounds); + SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(topLeftNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + for (++x; x < right - 1; ++x) + { + shiftMatrixLeft(m); + m[5] = PixelFetcher::Fetch(src, x + 1, y, srcBounds); + m[8] = PixelFetcher::Fetch(src, x + 1, y + 1, srcBounds); + surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(topNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + } + shiftMatrixLeft(m); + surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(topRightNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + } + + for (++y; y < bottom - 1; ++y) { + int x = left; + int m[9]; + m[1] = PixelFetcher::Fetch(src, x, y - 1, srcBounds); + m[2] = PixelFetcher::Fetch(src, x + 1, y - 1, srcBounds); + m[4] = PixelFetcher::Fetch(src, x, y, srcBounds); + m[5] = PixelFetcher::Fetch(src, x + 1, y, srcBounds); + m[7] = PixelFetcher::Fetch(src, x, y + 1, srcBounds); + m[8] = PixelFetcher::Fetch(src, x + 1, y + 1, srcBounds); + SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(leftNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + for (++x; x < right - 1; ++x) { + shiftMatrixLeft(m); + m[2] = PixelFetcher::Fetch(src, x + 1, y - 1, srcBounds); + m[5] = PixelFetcher::Fetch(src, x + 1, y, srcBounds); + m[8] = PixelFetcher::Fetch(src, x + 1, y + 1, srcBounds); + surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(interiorNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + } + shiftMatrixLeft(m); + surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(rightNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + } + + { + int x = left; + int m[9]; + m[1] = PixelFetcher::Fetch(src, x, bottom - 2, srcBounds); + m[2] = PixelFetcher::Fetch(src, x + 1, bottom - 2, srcBounds); + m[4] = PixelFetcher::Fetch(src, x, bottom - 1, srcBounds); + m[5] = PixelFetcher::Fetch(src, x + 1, bottom - 1, srcBounds); + SkPoint3 surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(bottomLeftNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + for (++x; x < right - 1; ++x) + { + shiftMatrixLeft(m); + m[2] = PixelFetcher::Fetch(src, x + 1, bottom - 2, srcBounds); + m[5] = PixelFetcher::Fetch(src, x + 1, bottom - 1, srcBounds); + surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(bottomNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + } + shiftMatrixLeft(m); + surfaceToLight = l->surfaceToLight(x, y, m[4], surfaceScale); + *dptr++ = lightingType.light(bottomRightNormal(m, surfaceScale), surfaceToLight, + l->lightColor(surfaceToLight)); + } +} + +static void lightBitmap(const BaseLightingType& lightingType, + const SkImageFilterLight* light, + const SkBitmap& src, + SkBitmap* dst, + SkScalar surfaceScale, + const SkIRect& bounds) { + if (src.bounds().contains(bounds)) { + lightBitmap( + lightingType, light, src, dst, surfaceScale, bounds); + } else { + lightBitmap( + lightingType, light, src, dst, surfaceScale, bounds); + } +} + +namespace { +enum BoundaryMode { + kTopLeft_BoundaryMode, + kTop_BoundaryMode, + kTopRight_BoundaryMode, + kLeft_BoundaryMode, + kInterior_BoundaryMode, + kRight_BoundaryMode, + kBottomLeft_BoundaryMode, + kBottom_BoundaryMode, + kBottomRight_BoundaryMode, + + kBoundaryModeCount, +}; + +class SkLightingImageFilterInternal : public SkImageFilter_Base { +protected: + SkLightingImageFilterInternal(sk_sp light, + SkScalar surfaceScale, + sk_sp input, + const SkRect* cropRect) + : INHERITED(&input, 1, cropRect) + , fLight(std::move(light)) + , fSurfaceScale(surfaceScale / 255) {} + + void flatten(SkWriteBuffer& buffer) const override { + this->INHERITED::flatten(buffer); + fLight->flattenLight(buffer); + buffer.writeScalar(fSurfaceScale * 255); + } + + bool onAffectsTransparentBlack() const override { return true; } + + const SkImageFilterLight* light() const { return fLight.get(); } + inline sk_sp refLight() const { return fLight; } + SkScalar surfaceScale() const { return fSurfaceScale; } + +#if defined(SK_GANESH) + sk_sp filterImageGPU(const Context& ctx, + SkSpecialImage* input, + const SkIRect& bounds, + const SkMatrix& matrix) const; + virtual std::unique_ptr makeFragmentProcessor(GrSurfaceProxyView, + const SkIPoint& viewOffset, + const SkMatrix&, + const SkIRect* srcBounds, + BoundaryMode boundaryMode, + const GrCaps&) const = 0; +#endif + +private: +#if defined(SK_GANESH) + void drawRect(skgpu::ganesh::SurfaceFillContext*, + GrSurfaceProxyView srcView, + const SkIPoint& viewOffset, + const SkMatrix& matrix, + const SkIRect& dstRect, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const SkIRect& bounds) const; +#endif + + sk_sp fLight; + SkScalar fSurfaceScale; + + using INHERITED = SkImageFilter_Base; +}; +} // anonymous namespace + +#if defined(SK_GANESH) +void SkLightingImageFilterInternal::drawRect(skgpu::ganesh::SurfaceFillContext* sfc, + GrSurfaceProxyView srcView, + const SkIPoint& viewOffset, + const SkMatrix& matrix, + const SkIRect& dstRect, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const SkIRect& bounds) const { + SkIRect srcRect = dstRect.makeOffset(bounds.topLeft()); + auto fp = this->makeFragmentProcessor(std::move(srcView), viewOffset, matrix, srcBounds, + boundaryMode, *sfc->caps()); + sfc->fillRectToRectWithFP(srcRect, dstRect, std::move(fp)); +} + +sk_sp SkLightingImageFilterInternal::filterImageGPU( + const Context& ctx, + SkSpecialImage* input, + const SkIRect& offsetBounds, + const SkMatrix& matrix) const { + SkASSERT(ctx.gpuBacked()); + + auto rContext = ctx.getContext(); + + GrSurfaceProxyView inputView = input->view(rContext); + SkASSERT(inputView.asTextureProxy()); + + GrImageInfo info(ctx.grColorType(), + kPremul_SkAlphaType, + ctx.refColorSpace(), + offsetBounds.size()); + auto sfc = rContext->priv().makeSFC(info, + "LightingImageFilterInternal_FilterImageGPU", + SkBackingFit::kApprox, + 1, + skgpu::Mipmapped::kNo, + inputView.proxy()->isProtected(), + kBottomLeft_GrSurfaceOrigin); + if (!sfc) { + return nullptr; + } + + SkIRect dstRect = SkIRect::MakeWH(offsetBounds.width(), offsetBounds.height()); + + const SkIRect inputBounds = SkIRect::MakeWH(input->width(), input->height()); + SkIRect topLeft = SkIRect::MakeXYWH(0, 0, 1, 1); + SkIRect top = SkIRect::MakeXYWH(1, 0, dstRect.width() - 2, 1); + SkIRect topRight = SkIRect::MakeXYWH(dstRect.width() - 1, 0, 1, 1); + SkIRect left = SkIRect::MakeXYWH(0, 1, 1, dstRect.height() - 2); + SkIRect interior = dstRect.makeInset(1, 1); + SkIRect right = SkIRect::MakeXYWH(dstRect.width() - 1, 1, 1, dstRect.height() - 2); + SkIRect bottomLeft = SkIRect::MakeXYWH(0, dstRect.height() - 1, 1, 1); + SkIRect bottom = SkIRect::MakeXYWH(1, dstRect.height() - 1, dstRect.width() - 2, 1); + SkIRect bottomRight = SkIRect::MakeXYWH(dstRect.width() - 1, dstRect.height() - 1, 1, 1); + + const SkIRect* pSrcBounds = inputBounds.contains(offsetBounds) ? nullptr : &inputBounds; + const SkIPoint inputViewOffset = input->subset().topLeft(); + + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, topLeft, + kTopLeft_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, top, + kTop_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, topRight, + kTopRight_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, left, + kLeft_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, interior, + kInterior_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, right, + kRight_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, bottomLeft, + kBottomLeft_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), inputView, inputViewOffset, matrix, bottom, + kBottom_BoundaryMode, pSrcBounds, offsetBounds); + this->drawRect(sfc.get(), std::move(inputView), inputViewOffset, matrix, bottomRight, + kBottomRight_BoundaryMode, pSrcBounds, offsetBounds); + + return SkSpecialImage::MakeDeferredFromGpu( + rContext, + SkIRect::MakeWH(offsetBounds.width(), offsetBounds.height()), + kNeedNewImageUniqueID_SpecialImage, + sfc->readSurfaceView(), + sfc->colorInfo(), + ctx.surfaceProps()); +} +#endif + +namespace { +class SkDiffuseLightingImageFilter : public SkLightingImageFilterInternal { +public: + static sk_sp Make(sk_sp light, + SkScalar surfaceScale, + SkScalar kd, + sk_sp, + const SkRect*); + + SkScalar kd() const { return fKD; } + +protected: + SkDiffuseLightingImageFilter(sk_sp light, SkScalar surfaceScale, + SkScalar kd, + sk_sp input, const SkRect* cropRect); + void flatten(SkWriteBuffer& buffer) const override; + + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + +#if defined(SK_GANESH) + std::unique_ptr makeFragmentProcessor(GrSurfaceProxyView, + const SkIPoint& viewOffset, + const SkMatrix&, + const SkIRect* bounds, + BoundaryMode, + const GrCaps&) const override; +#endif + +private: + SK_FLATTENABLE_HOOKS(SkDiffuseLightingImageFilter) + friend void ::SkRegisterLightingImageFilterFlattenables(); + SkScalar fKD; + + using INHERITED = SkLightingImageFilterInternal; +}; + +class SkSpecularLightingImageFilter : public SkLightingImageFilterInternal { +public: + static sk_sp Make(sk_sp light, + SkScalar surfaceScale, + SkScalar ks, SkScalar shininess, + sk_sp, const SkRect*); + + SkScalar ks() const { return fKS; } + SkScalar shininess() const { return fShininess; } + +protected: + SkSpecularLightingImageFilter(sk_sp light, + SkScalar surfaceScale, SkScalar ks, + SkScalar shininess, + sk_sp input, const SkRect*); + void flatten(SkWriteBuffer& buffer) const override; + + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + +#if defined(SK_GANESH) + std::unique_ptr makeFragmentProcessor(GrSurfaceProxyView, + const SkIPoint& viewOffset, + const SkMatrix&, + const SkIRect* bounds, + BoundaryMode, + const GrCaps&) const override; +#endif + +private: + SK_FLATTENABLE_HOOKS(SkSpecularLightingImageFilter) + friend void ::SkRegisterLightingImageFilterFlattenables(); + + SkScalar fKS; + SkScalar fShininess; + + using INHERITED = SkLightingImageFilterInternal; +}; + +#if defined(SK_GANESH) + +class LightingEffect : public GrFragmentProcessor { +public: + const SkImageFilterLight* light() const { return fLight.get(); } + SkScalar surfaceScale() const { return fSurfaceScale; } + const SkMatrix& filterMatrix() const { return fFilterMatrix; } + BoundaryMode boundaryMode() const { return fBoundaryMode; } + +protected: + class ImplBase; + + LightingEffect(ClassID classID, + GrSurfaceProxyView, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps& caps); + + explicit LightingEffect(const LightingEffect& that); + + bool onIsEqual(const GrFragmentProcessor&) const override; + +private: + void onAddToKey(const GrShaderCaps& caps, skgpu::KeyBuilder* b) const override { + b->add32(fBoundaryMode << 2 | fLight->type()); + } + + sk_sp fLight; + SkScalar fSurfaceScale; + SkMatrix fFilterMatrix; + BoundaryMode fBoundaryMode; + + using INHERITED = GrFragmentProcessor; +}; + +class DiffuseLightingEffect : public LightingEffect { +public: + static std::unique_ptr Make(GrSurfaceProxyView view, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + SkScalar kd, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps& caps) { + return std::unique_ptr(new DiffuseLightingEffect(std::move(view), + viewOffset, + std::move(light), + surfaceScale, + matrix, + kd, + boundaryMode, + srcBounds, + caps)); + } + + const char* name() const override { return "DiffuseLighting"; } + + std::unique_ptr clone() const override { + return std::unique_ptr(new DiffuseLightingEffect(*this)); + } + +private: + class Impl; + + std::unique_ptr onMakeProgramImpl() const override; + + bool onIsEqual(const GrFragmentProcessor&) const override; + + DiffuseLightingEffect(GrSurfaceProxyView view, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + SkScalar kd, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps& caps); + + explicit DiffuseLightingEffect(const DiffuseLightingEffect& that); + + GR_DECLARE_FRAGMENT_PROCESSOR_TEST + SkScalar fKD; + + using INHERITED = LightingEffect; +}; + +class SpecularLightingEffect : public LightingEffect { +public: + static std::unique_ptr Make(GrSurfaceProxyView view, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + SkScalar ks, + SkScalar shininess, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps& caps) { + return std::unique_ptr(new SpecularLightingEffect(std::move(view), + viewOffset, + std::move(light), + surfaceScale, + matrix, + ks, + shininess, + boundaryMode, + srcBounds, + caps)); + } + + const char* name() const override { return "SpecularLighting"; } + + std::unique_ptr clone() const override { + return std::unique_ptr(new SpecularLightingEffect(*this)); + } + + std::unique_ptr onMakeProgramImpl() const override; + +private: + class Impl; + + bool onIsEqual(const GrFragmentProcessor&) const override; + + SpecularLightingEffect(GrSurfaceProxyView, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + SkScalar ks, + SkScalar shininess, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps&); + + explicit SpecularLightingEffect(const SpecularLightingEffect&); + + GR_DECLARE_FRAGMENT_PROCESSOR_TEST + SkScalar fKS; + SkScalar fShininess; + + using INHERITED = LightingEffect; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class GpuLight { +public: + virtual ~GpuLight() = default; + + /** + * This is called by GrGLLightingEffect::emitCode() before either of the two virtual functions + * below. It adds a half3 uniform visible in the FS that represents the constant light color. + */ + void emitLightColorUniform(const GrFragmentProcessor*, GrGLSLUniformHandler*); + + /** + * These two functions are called from GrGLLightingEffect's emitCode() function. + * emitSurfaceToLight places an expression in param out that is the vector from the surface to + * the light. The expression will be used in the FS. emitLightColor writes an expression into + * the FS that is the color of the light. Either function may add functions and/or uniforms to + * the FS. The default of emitLightColor appends the name of the constant light color uniform + * and so this function only needs to be overridden if the light color varies spatially. + */ + virtual void emitSurfaceToLight(const GrFragmentProcessor*, + GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, + const char* z) = 0; + virtual void emitLightColor(const GrFragmentProcessor*, + GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, + const char *surfaceToLight); + + // This is called from GrGLLightingEffect's setData(). Subclasses of GrGLLight must call + // INHERITED::setData(). + virtual void setData(const GrGLSLProgramDataManager&, const SkImageFilterLight* light) const; + +protected: + /** + * Gets the constant light color uniform. Subclasses can use this in their emitLightColor + * function. + */ + UniformHandle lightColorUni() const { return fColorUni; } + +private: + UniformHandle fColorUni; + + using INHERITED = SkRefCnt; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class GpuDistantLight : public GpuLight { +public: + void setData(const GrGLSLProgramDataManager&, const SkImageFilterLight* light) const override; + void emitSurfaceToLight(const GrFragmentProcessor*, GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, const char* z) override; + +private: + using INHERITED = GpuLight; + UniformHandle fDirectionUni; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class GpuPointLight : public GpuLight { +public: + void setData(const GrGLSLProgramDataManager&, const SkImageFilterLight* light) const override; + void emitSurfaceToLight(const GrFragmentProcessor*, GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, const char* z) override; + +private: + using INHERITED = GpuLight; + UniformHandle fLocationUni; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class GpuSpotLight : public GpuLight { +public: + void setData(const GrGLSLProgramDataManager&, const SkImageFilterLight* light) const override; + void emitSurfaceToLight(const GrFragmentProcessor*, GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, const char* z) override; + void emitLightColor(const GrFragmentProcessor*, + GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, + const char *surfaceToLight) override; + +private: + using INHERITED = GpuLight; + + SkString fLightColorFunc; + UniformHandle fLocationUni; + UniformHandle fExponentUni; + UniformHandle fCosOuterConeAngleUni; + UniformHandle fCosInnerConeAngleUni; + UniformHandle fConeScaleUni; + UniformHandle fSUni; +}; + +#else + +class GpuLight {}; + +#endif + +/////////////////////////////////////////////////////////////////////////////// + +class SkDistantLight : public SkImageFilterLight { +public: + SkDistantLight(const SkPoint3& direction, SkColor color) + : INHERITED(color), fDirection(direction) { + } + + SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const override { + return fDirection; + } + SkPoint3 lightColor(const SkPoint3&) const override { return this->color(); } + LightType type() const override { return kDistant_LightType; } + const SkPoint3& direction() const { return fDirection; } + std::unique_ptr createGpuLight() const override { +#if defined(SK_GANESH) + return std::make_unique(); +#else + SkDEBUGFAIL("Should not call in GPU-less build"); + return nullptr; +#endif + } + + bool isEqual(const SkImageFilterLight& other) const override { + if (other.type() != kDistant_LightType) { + return false; + } + + const SkDistantLight& o = static_cast(other); + return INHERITED::isEqual(other) && + fDirection == o.fDirection; + } + + SkDistantLight(SkReadBuffer& buffer) : INHERITED(buffer) { + fDirection = read_point3(buffer); + } + +protected: + SkDistantLight(const SkPoint3& direction, const SkPoint3& color) + : INHERITED(color), fDirection(direction) { + } + SkImageFilterLight* transform(const SkMatrix& matrix) const override { + return new SkDistantLight(direction(), color()); + } + void onFlattenLight(SkWriteBuffer& buffer) const override { + write_point3(fDirection, buffer); + } + +private: + SkPoint3 fDirection; + + using INHERITED = SkImageFilterLight; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkPointLight : public SkImageFilterLight { +public: + SkPointLight(const SkPoint3& location, SkColor color) + : INHERITED(color), fLocation(location) {} + + SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const override { + SkPoint3 direction = SkPoint3::Make(fLocation.fX - SkIntToScalar(x), + fLocation.fY - SkIntToScalar(y), + fLocation.fZ - SkIntToScalar(z) * surfaceScale); + fast_normalize(&direction); + return direction; + } + SkPoint3 lightColor(const SkPoint3&) const override { return this->color(); } + LightType type() const override { return kPoint_LightType; } + const SkPoint3& location() const { return fLocation; } + std::unique_ptr createGpuLight() const override { +#if defined(SK_GANESH) + return std::make_unique(); +#else + SkDEBUGFAIL("Should not call in GPU-less build"); + return nullptr; +#endif + } + + bool isEqual(const SkImageFilterLight& other) const override { + if (other.type() != kPoint_LightType) { + return false; + } + const SkPointLight& o = static_cast(other); + return INHERITED::isEqual(other) && + fLocation == o.fLocation; + } + SkImageFilterLight* transform(const SkMatrix& matrix) const override { + SkPoint location2 = SkPoint::Make(fLocation.fX, fLocation.fY); + matrix.mapPoints(&location2, 1); + // Use X scale and Y scale on Z and average the result + SkPoint locationZ = SkPoint::Make(fLocation.fZ, fLocation.fZ); + matrix.mapVectors(&locationZ, 1); + SkPoint3 location = SkPoint3::Make(location2.fX, + location2.fY, + SkScalarAve(locationZ.fX, locationZ.fY)); + return new SkPointLight(location, color()); + } + + SkPointLight(SkReadBuffer& buffer) : INHERITED(buffer) { + fLocation = read_point3(buffer); + } + +protected: + SkPointLight(const SkPoint3& location, const SkPoint3& color) + : INHERITED(color), fLocation(location) {} + void onFlattenLight(SkWriteBuffer& buffer) const override { + write_point3(fLocation, buffer); + } + +private: + SkPoint3 fLocation; + + using INHERITED = SkImageFilterLight; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkSpotLight : public SkImageFilterLight { +public: + SkSpotLight(const SkPoint3& location, + const SkPoint3& target, + SkScalar specularExponent, + SkScalar cutoffAngle, + SkColor color) + : INHERITED(color), + fLocation(location), + fTarget(target), + fSpecularExponent(specularExponent) + { + fS = target - location; + fast_normalize(&fS); + fCosOuterConeAngle = SkScalarCos(SkDegreesToRadians(cutoffAngle)); + const SkScalar antiAliasThreshold = 0.016f; + fCosInnerConeAngle = fCosOuterConeAngle + antiAliasThreshold; + fConeScale = SkScalarInvert(antiAliasThreshold); + } + + SkImageFilterLight* transform(const SkMatrix& matrix) const override { + SkPoint location2 = SkPoint::Make(fLocation.fX, fLocation.fY); + matrix.mapPoints(&location2, 1); + // Use X scale and Y scale on Z and average the result + SkPoint locationZ = SkPoint::Make(fLocation.fZ, fLocation.fZ); + matrix.mapVectors(&locationZ, 1); + SkPoint3 location = SkPoint3::Make(location2.fX, location2.fY, + SkScalarAve(locationZ.fX, locationZ.fY)); + SkPoint target2 = SkPoint::Make(fTarget.fX, fTarget.fY); + matrix.mapPoints(&target2, 1); + SkPoint targetZ = SkPoint::Make(fTarget.fZ, fTarget.fZ); + matrix.mapVectors(&targetZ, 1); + SkPoint3 target = SkPoint3::Make(target2.fX, target2.fY, + SkScalarAve(targetZ.fX, targetZ.fY)); + SkPoint3 s = target - location; + fast_normalize(&s); + return new SkSpotLight(location, + target, + fSpecularExponent, + fCosOuterConeAngle, + fCosInnerConeAngle, + fConeScale, + s, + color()); + } + + SkPoint3 surfaceToLight(int x, int y, int z, SkScalar surfaceScale) const override { + SkPoint3 direction = SkPoint3::Make(fLocation.fX - SkIntToScalar(x), + fLocation.fY - SkIntToScalar(y), + fLocation.fZ - SkIntToScalar(z) * surfaceScale); + fast_normalize(&direction); + return direction; + } + SkPoint3 lightColor(const SkPoint3& surfaceToLight) const override { + SkScalar cosAngle = -surfaceToLight.dot(fS); + SkScalar scale = 0; + if (cosAngle >= fCosOuterConeAngle) { + scale = SkScalarPow(cosAngle, fSpecularExponent); + if (cosAngle < fCosInnerConeAngle) { + scale *= (cosAngle - fCosOuterConeAngle) * fConeScale; + } + } + return this->color().makeScale(scale); + } + std::unique_ptr createGpuLight() const override { +#if defined(SK_GANESH) + return std::make_unique(); +#else + SkDEBUGFAIL("Should not call in GPU-less build"); + return nullptr; +#endif + } + LightType type() const override { return kSpot_LightType; } + const SkPoint3& location() const { return fLocation; } + const SkPoint3& target() const { return fTarget; } + SkScalar specularExponent() const { return fSpecularExponent; } + SkScalar cosInnerConeAngle() const { return fCosInnerConeAngle; } + SkScalar cosOuterConeAngle() const { return fCosOuterConeAngle; } + SkScalar coneScale() const { return fConeScale; } + const SkPoint3& s() const { return fS; } + + SkSpotLight(SkReadBuffer& buffer) : INHERITED(buffer) { + fLocation = read_point3(buffer); + fTarget = read_point3(buffer); + fSpecularExponent = buffer.readScalar(); + fCosOuterConeAngle = buffer.readScalar(); + fCosInnerConeAngle = buffer.readScalar(); + fConeScale = buffer.readScalar(); + fS = read_point3(buffer); + buffer.validate(SkScalarIsFinite(fSpecularExponent) && + SkScalarIsFinite(fCosOuterConeAngle) && + SkScalarIsFinite(fCosInnerConeAngle) && + SkScalarIsFinite(fConeScale)); + } +protected: + SkSpotLight(const SkPoint3& location, + const SkPoint3& target, + SkScalar specularExponent, + SkScalar cosOuterConeAngle, + SkScalar cosInnerConeAngle, + SkScalar coneScale, + const SkPoint3& s, + const SkPoint3& color) + : INHERITED(color), + fLocation(location), + fTarget(target), + fSpecularExponent(specularExponent), + fCosOuterConeAngle(cosOuterConeAngle), + fCosInnerConeAngle(cosInnerConeAngle), + fConeScale(coneScale), + fS(s) + { + } + void onFlattenLight(SkWriteBuffer& buffer) const override { + write_point3(fLocation, buffer); + write_point3(fTarget, buffer); + buffer.writeScalar(fSpecularExponent); + buffer.writeScalar(fCosOuterConeAngle); + buffer.writeScalar(fCosInnerConeAngle); + buffer.writeScalar(fConeScale); + write_point3(fS, buffer); + } + + bool isEqual(const SkImageFilterLight& other) const override { + if (other.type() != kSpot_LightType) { + return false; + } + + const SkSpotLight& o = static_cast(other); + return INHERITED::isEqual(other) && + fLocation == o.fLocation && + fTarget == o.fTarget && + fSpecularExponent == o.fSpecularExponent && + fCosOuterConeAngle == o.fCosOuterConeAngle; + } + +private: + SkPoint3 fLocation; + SkPoint3 fTarget; + SkScalar fSpecularExponent; + SkScalar fCosOuterConeAngle; + SkScalar fCosInnerConeAngle; + SkScalar fConeScale; + SkPoint3 fS; + + using INHERITED = SkImageFilterLight; +}; +} // anonymous namespace + +/////////////////////////////////////////////////////////////////////////////// + +void SkImageFilterLight::flattenLight(SkWriteBuffer& buffer) const { + // Write type first, then baseclass, then subclass. + buffer.writeInt(this->type()); + write_point3(fColor, buffer); + this->onFlattenLight(buffer); +} + +/*static*/ SkImageFilterLight* SkImageFilterLight::UnflattenLight(SkReadBuffer& buffer) { + SkImageFilterLight::LightType type = buffer.read32LE(SkImageFilterLight::kLast_LightType); + + switch (type) { + // Each of these constructors must first call SkLight's, so we'll read the baseclass + // then subclass, same order as flattenLight. + case SkImageFilterLight::kDistant_LightType: + return new SkDistantLight(buffer); + case SkImageFilterLight::kPoint_LightType: + return new SkPointLight(buffer); + case SkImageFilterLight::kSpot_LightType: + return new SkSpotLight(buffer); + default: + // Should never get here due to prior check of SkSafeRange + SkDEBUGFAIL("Unknown LightType."); + return nullptr; + } +} +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImageFilters::DistantLitDiffuse( + const SkPoint3& direction, SkColor lightColor, SkScalar surfaceScale, SkScalar kd, + sk_sp input, const CropRect& cropRect) { + sk_sp light(new SkDistantLight(direction, lightColor)); + return SkDiffuseLightingImageFilter::Make(std::move(light), surfaceScale, kd, + std::move(input), cropRect); +} + +sk_sp SkImageFilters::PointLitDiffuse( + const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, SkScalar kd, + sk_sp input, const CropRect& cropRect) { + sk_sp light(new SkPointLight(location, lightColor)); + return SkDiffuseLightingImageFilter::Make(std::move(light), surfaceScale, kd, + std::move(input), cropRect); +} + +sk_sp SkImageFilters::SpotLitDiffuse( + const SkPoint3& location, const SkPoint3& target, SkScalar falloffExponent, + SkScalar cutoffAngle, SkColor lightColor, SkScalar surfaceScale, SkScalar kd, + sk_sp input, const CropRect& cropRect) { + sk_sp light(new SkSpotLight(location, target, falloffExponent, + cutoffAngle, lightColor)); + return SkDiffuseLightingImageFilter::Make(std::move(light), surfaceScale, kd, + std::move(input), cropRect); +} + +sk_sp SkImageFilters::DistantLitSpecular( + const SkPoint3& direction, SkColor lightColor, SkScalar surfaceScale, SkScalar ks, + SkScalar shininess, sk_sp input, const CropRect& cropRect) { + sk_sp light(new SkDistantLight(direction, lightColor)); + return SkSpecularLightingImageFilter::Make(std::move(light), surfaceScale, ks, shininess, + std::move(input), cropRect); +} + +sk_sp SkImageFilters::PointLitSpecular( + const SkPoint3& location, SkColor lightColor, SkScalar surfaceScale, SkScalar ks, + SkScalar shininess, sk_sp input, const CropRect& cropRect) { + sk_sp light(new SkPointLight(location, lightColor)); + return SkSpecularLightingImageFilter::Make(std::move(light), surfaceScale, ks, shininess, + std::move(input), cropRect); +} + +sk_sp SkImageFilters::SpotLitSpecular( + const SkPoint3& location, const SkPoint3& target, SkScalar falloffExponent, + SkScalar cutoffAngle, SkColor lightColor, SkScalar surfaceScale, SkScalar ks, + SkScalar shininess, sk_sp input, const CropRect& cropRect) { + sk_sp light(new SkSpotLight(location, target, falloffExponent, + cutoffAngle, lightColor)); + return SkSpecularLightingImageFilter::Make(std::move(light), surfaceScale, ks, shininess, + std::move(input), cropRect); +} + +void SkRegisterLightingImageFilterFlattenables() { + SK_REGISTER_FLATTENABLE(SkDiffuseLightingImageFilter); + SK_REGISTER_FLATTENABLE(SkSpecularLightingImageFilter); +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkDiffuseLightingImageFilter::Make(sk_sp light, + SkScalar surfaceScale, + SkScalar kd, + sk_sp input, + const SkRect* cropRect) { + if (!light) { + return nullptr; + } + if (!SkScalarIsFinite(surfaceScale) || !SkScalarIsFinite(kd)) { + return nullptr; + } + // According to the spec, kd can be any non-negative number : + // http://www.w3.org/TR/SVG/filters.html#feDiffuseLightingElement + if (kd < 0) { + return nullptr; + } + return sk_sp(new SkDiffuseLightingImageFilter(std::move(light), surfaceScale, + kd, std::move(input), cropRect)); +} + +SkDiffuseLightingImageFilter::SkDiffuseLightingImageFilter(sk_sp light, + SkScalar surfaceScale, + SkScalar kd, + sk_sp input, + const SkRect* cropRect) + : INHERITED(std::move(light), surfaceScale, std::move(input), cropRect) + , fKD(kd) { +} + +sk_sp SkDiffuseLightingImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + + sk_sp light(SkImageFilterLight::UnflattenLight(buffer)); + SkScalar surfaceScale = buffer.readScalar(); + SkScalar kd = buffer.readScalar(); + + return Make(std::move(light), surfaceScale, kd, common.getInput(0), common.cropRect()); +} + +void SkDiffuseLightingImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeScalar(fKD); +} + +sk_sp SkDiffuseLightingImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(), + input->width(), input->height()); + SkIRect bounds; + if (!this->applyCropRect(ctx, inputBounds, &bounds)) { + return nullptr; + } + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + bounds.offset(-inputOffset); + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + SkMatrix matrix(ctx.ctm()); + matrix.postTranslate(SkIntToScalar(-offset->fX), SkIntToScalar(-offset->fY)); + + return this->filterImageGPU(ctx, input.get(), bounds, matrix); + } +#endif + + if (bounds.width() < 2 || bounds.height() < 2) { + return nullptr; + } + + SkBitmap inputBM; + + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if (inputBM.colorType() != kN32_SkColorType) { + return nullptr; + } + + if (!inputBM.getPixels()) { + return nullptr; + } + + const SkImageInfo info = SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()); + + SkBitmap dst; + if (!dst.tryAllocPixels(info)) { + return nullptr; + } + + SkMatrix matrix(ctx.ctm()); + matrix.postTranslate(SkIntToScalar(-inputOffset.x()), SkIntToScalar(-inputOffset.y())); + + sk_sp transformedLight(light()->transform(matrix)); + + DiffuseLightingType lightingType(fKD); + lightBitmap(lightingType, + transformedLight.get(), + inputBM, + &dst, + surfaceScale(), + bounds); + + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()), + dst, ctx.surfaceProps()); +} + +#if defined(SK_GANESH) +std::unique_ptr SkDiffuseLightingImageFilter::makeFragmentProcessor( + GrSurfaceProxyView view, + const SkIPoint& viewOffset, + const SkMatrix& matrix, + const SkIRect* srcBounds, + BoundaryMode boundaryMode, + const GrCaps& caps) const { + SkScalar scale = this->surfaceScale() * 255; + return DiffuseLightingEffect::Make(std::move(view), + viewOffset, + this->refLight(), + scale, + matrix, + this->kd(), + boundaryMode, + srcBounds, + caps); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkSpecularLightingImageFilter::Make(sk_sp light, + SkScalar surfaceScale, + SkScalar ks, + SkScalar shininess, + sk_sp input, + const SkRect* cropRect) { + if (!light) { + return nullptr; + } + if (!SkScalarIsFinite(surfaceScale) || !SkScalarIsFinite(ks) || !SkScalarIsFinite(shininess)) { + return nullptr; + } + // According to the spec, ks can be any non-negative number : + // http://www.w3.org/TR/SVG/filters.html#feSpecularLightingElement + if (ks < 0) { + return nullptr; + } + return sk_sp(new SkSpecularLightingImageFilter(std::move(light), surfaceScale, + ks, shininess, + std::move(input), cropRect)); +} + +SkSpecularLightingImageFilter::SkSpecularLightingImageFilter(sk_sp light, + SkScalar surfaceScale, + SkScalar ks, + SkScalar shininess, + sk_sp input, + const SkRect* cropRect) + : INHERITED(std::move(light), surfaceScale, std::move(input), cropRect) + , fKS(ks) + , fShininess(shininess) { +} + +sk_sp SkSpecularLightingImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + sk_sp light(SkImageFilterLight::UnflattenLight(buffer)); + SkScalar surfaceScale = buffer.readScalar(); + SkScalar ks = buffer.readScalar(); + SkScalar shine = buffer.readScalar(); + + return Make(std::move(light), surfaceScale, ks, shine, common.getInput(0), + common.cropRect()); +} + +void SkSpecularLightingImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeScalar(fKS); + buffer.writeScalar(fShininess); +} + +sk_sp SkSpecularLightingImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(), + input->width(), input->height()); + SkIRect bounds; + if (!this->applyCropRect(ctx, inputBounds, &bounds)) { + return nullptr; + } + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + bounds.offset(-inputOffset); + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + SkMatrix matrix(ctx.ctm()); + matrix.postTranslate(SkIntToScalar(-offset->fX), SkIntToScalar(-offset->fY)); + + return this->filterImageGPU(ctx, input.get(), bounds, matrix); + } +#endif + + if (bounds.width() < 2 || bounds.height() < 2) { + return nullptr; + } + + SkBitmap inputBM; + + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if (inputBM.colorType() != kN32_SkColorType) { + return nullptr; + } + + if (!inputBM.getPixels()) { + return nullptr; + } + + const SkImageInfo info = SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()); + + SkBitmap dst; + if (!dst.tryAllocPixels(info)) { + return nullptr; + } + + SpecularLightingType lightingType(fKS, fShininess); + + SkMatrix matrix(ctx.ctm()); + matrix.postTranslate(SkIntToScalar(-inputOffset.x()), SkIntToScalar(-inputOffset.y())); + + sk_sp transformedLight(light()->transform(matrix)); + + lightBitmap(lightingType, + transformedLight.get(), + inputBM, + &dst, + surfaceScale(), + bounds); + + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()), dst, + ctx.surfaceProps()); +} + +#if defined(SK_GANESH) +std::unique_ptr SkSpecularLightingImageFilter::makeFragmentProcessor( + GrSurfaceProxyView view, + const SkIPoint& viewOffset, + const SkMatrix& matrix, + const SkIRect* srcBounds, + BoundaryMode boundaryMode, + const GrCaps& caps) const { + SkScalar scale = this->surfaceScale() * 255; + return SpecularLightingEffect::Make(std::move(view), + viewOffset, + this->refLight(), + scale, + matrix, + this->ks(), + this->shininess(), + boundaryMode, + srcBounds, + caps); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +static SkString emitNormalFunc(BoundaryMode mode, + const char* pointToNormalName, + const char* sobelFuncName) { + SkString result; + switch (mode) { + case kTopLeft_BoundaryMode: + result.printf("return %s(%s(0.0, 0.0, m[4], m[5], m[7], m[8], %g)," + " %s(0.0, 0.0, m[4], m[7], m[5], m[8], %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gTwoThirds, + sobelFuncName, gTwoThirds); + break; + case kTop_BoundaryMode: + result.printf("return %s(%s(0.0, 0.0, m[3], m[5], m[6], m[8], %g)," + " %s(0.0, 0.0, m[4], m[7], m[5], m[8], %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gOneThird, + sobelFuncName, gOneHalf); + break; + case kTopRight_BoundaryMode: + result.printf("return %s(%s( 0.0, 0.0, m[3], m[4], m[6], m[7], %g)," + " %s(m[3], m[6], m[4], m[7], 0.0, 0.0, %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gTwoThirds, + sobelFuncName, gTwoThirds); + break; + case kLeft_BoundaryMode: + result.printf("return %s(%s(m[1], m[2], m[4], m[5], m[7], m[8], %g)," + " %s( 0.0, 0.0, m[1], m[7], m[2], m[8], %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gOneHalf, + sobelFuncName, gOneThird); + break; + case kInterior_BoundaryMode: + result.printf("return %s(%s(m[0], m[2], m[3], m[5], m[6], m[8], %g)," + " %s(m[0], m[6], m[1], m[7], m[2], m[8], %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gOneQuarter, + sobelFuncName, gOneQuarter); + break; + case kRight_BoundaryMode: + result.printf("return %s(%s(m[0], m[1], m[3], m[4], m[6], m[7], %g)," + " %s(m[0], m[6], m[1], m[7], 0.0, 0.0, %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gOneHalf, + sobelFuncName, gOneThird); + break; + case kBottomLeft_BoundaryMode: + result.printf("return %s(%s(m[1], m[2], m[4], m[5], 0.0, 0.0, %g)," + " %s( 0.0, 0.0, m[1], m[4], m[2], m[5], %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gTwoThirds, + sobelFuncName, gTwoThirds); + break; + case kBottom_BoundaryMode: + result.printf("return %s(%s(m[0], m[2], m[3], m[5], 0.0, 0.0, %g)," + " %s(m[0], m[3], m[1], m[4], m[2], m[5], %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gOneThird, + sobelFuncName, gOneHalf); + break; + case kBottomRight_BoundaryMode: + result.printf("return %s(%s(m[0], m[1], m[3], m[4], 0.0, 0.0, %g)," + " %s(m[0], m[3], m[1], m[4], 0.0, 0.0, %g)," + " surfaceScale);", + pointToNormalName, sobelFuncName, gTwoThirds, + sobelFuncName, gTwoThirds); + break; + default: + SkASSERT(false); + break; + } + return result; +} + +namespace { +class LightingEffect::ImplBase : public ProgramImpl { +public: + void emitCode(EmitArgs&) override; + +protected: + /** + * Subclasses of LightingImpl must call INHERITED::onSetData(); + */ + void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override; + + virtual void emitLightFunc(const GrFragmentProcessor*, + GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, + SkString* funcName) = 0; + +private: + UniformHandle fSurfaceScaleUni; + std::unique_ptr fLight; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class DiffuseLightingEffect::Impl : public ImplBase { +public: + void emitLightFunc(const GrFragmentProcessor*, + GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, + SkString* funcName) override; + +private: + void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override; + + using INHERITED = ImplBase; + + UniformHandle fKDUni; +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SpecularLightingEffect::Impl : public ImplBase { +public: + void emitLightFunc(const GrFragmentProcessor*, + GrGLSLUniformHandler*, + GrGLSLFPFragmentBuilder*, + SkString* funcName) override; + +private: + void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override; + + using INHERITED = ImplBase; + + UniformHandle fKSUni; + UniformHandle fShininessUni; +}; +} // anonymous namespace + +/////////////////////////////////////////////////////////////////////////////// + +LightingEffect::LightingEffect(ClassID classID, + GrSurfaceProxyView view, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps& caps) + // Perhaps this could advertise the opaque or coverage-as-alpha optimizations? + : INHERITED(classID, kNone_OptimizationFlags) + , fLight(std::move(light)) + , fSurfaceScale(surfaceScale) + , fFilterMatrix(matrix) + , fBoundaryMode(boundaryMode) { + static constexpr GrSamplerState kSampler(GrSamplerState::WrapMode::kClampToBorder, + GrSamplerState::Filter::kNearest); + std::unique_ptr child; + if (srcBounds) { + SkRect offsetSrcBounds = SkRect::Make(*srcBounds); + offsetSrcBounds.offset(viewOffset.fX, viewOffset.fY); + child = GrTextureEffect::MakeSubset(std::move(view), kPremul_SkAlphaType, + SkMatrix::Translate(viewOffset.fX, viewOffset.fY), + kSampler, offsetSrcBounds, caps); + } else { + child = GrTextureEffect::Make(std::move(view), kPremul_SkAlphaType, + SkMatrix::Translate(viewOffset.fX, viewOffset.fY), + kSampler, caps); + } + this->registerChild(std::move(child), SkSL::SampleUsage::Explicit()); + this->setUsesSampleCoordsDirectly(); +} + +LightingEffect::LightingEffect(const LightingEffect& that) + : INHERITED(that) + , fLight(that.fLight) + , fSurfaceScale(that.fSurfaceScale) + , fFilterMatrix(that.fFilterMatrix) + , fBoundaryMode(that.fBoundaryMode) {} + +bool LightingEffect::onIsEqual(const GrFragmentProcessor& sBase) const { + const LightingEffect& s = sBase.cast(); + return fLight->isEqual(*s.fLight) && + fSurfaceScale == s.fSurfaceScale && + fBoundaryMode == s.fBoundaryMode; +} + +/////////////////////////////////////////////////////////////////////////////// + +DiffuseLightingEffect::DiffuseLightingEffect(GrSurfaceProxyView view, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + SkScalar kd, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps& caps) + : INHERITED(kGrDiffuseLightingEffect_ClassID, + std::move(view), + viewOffset, + std::move(light), + surfaceScale, + matrix, + boundaryMode, + srcBounds, + caps) + , fKD(kd) {} + +DiffuseLightingEffect::DiffuseLightingEffect(const DiffuseLightingEffect& that) + : INHERITED(that), fKD(that.fKD) {} + +bool DiffuseLightingEffect::onIsEqual(const GrFragmentProcessor& sBase) const { + const DiffuseLightingEffect& s = sBase.cast(); + return INHERITED::onIsEqual(sBase) && fKD == s.fKD; +} + +std::unique_ptr DiffuseLightingEffect::onMakeProgramImpl() const { + return std::make_unique(); +} + +GR_DEFINE_FRAGMENT_PROCESSOR_TEST(DiffuseLightingEffect) + +#if GR_TEST_UTILS + +static SkPoint3 random_point3(SkRandom* random) { + return SkPoint3::Make(SkScalarToFloat(random->nextSScalar1()), + SkScalarToFloat(random->nextSScalar1()), + SkScalarToFloat(random->nextSScalar1())); +} + +static SkImageFilterLight* create_random_light(SkRandom* random) { + int type = random->nextULessThan(3); + switch (type) { + case 0: { + return new SkDistantLight(random_point3(random), random->nextU()); + } + case 1: { + return new SkPointLight(random_point3(random), random->nextU()); + } + case 2: { + return new SkSpotLight(random_point3(random), random_point3(random), + random->nextUScalar1(), random->nextUScalar1(), random->nextU()); + } + default: + SK_ABORT("Unexpected value."); + } +} + +std::unique_ptr DiffuseLightingEffect::TestCreate(GrProcessorTestData* d) { + auto [view, ct, at] = d->randomView(); + SkScalar surfaceScale = d->fRandom->nextSScalar1(); + SkScalar kd = d->fRandom->nextUScalar1(); + sk_sp light(create_random_light(d->fRandom)); + SkMatrix matrix; + for (int i = 0; i < 9; i++) { + matrix[i] = d->fRandom->nextUScalar1(); + } + + uint32_t boundsX = d->fRandom->nextRangeU(0, view.width()); + uint32_t boundsY = d->fRandom->nextRangeU(0, view.height()); + uint32_t boundsW = d->fRandom->nextRangeU(0, view.width()); + uint32_t boundsH = d->fRandom->nextRangeU(0, view.height()); + SkIRect srcBounds = SkIRect::MakeXYWH(boundsX, boundsY, boundsW, boundsH); + BoundaryMode mode = static_cast(d->fRandom->nextU() % kBoundaryModeCount); + + return DiffuseLightingEffect::Make(std::move(view), + SkIPoint(), + std::move(light), + surfaceScale, + matrix, + kd, + mode, + &srcBounds, + *d->caps()); +} +#endif + + +/////////////////////////////////////////////////////////////////////////////// + +void LightingEffect::ImplBase::emitCode(EmitArgs& args) { + const LightingEffect& le = args.fFp.cast(); + if (!fLight) { + fLight = le.light()->createGpuLight(); + } + + GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; + fSurfaceScaleUni = uniformHandler->addUniform(&le, + kFragment_GrShaderFlag, + SkSLType::kHalf, "SurfaceScale"); + fLight->emitLightColorUniform(&le, uniformHandler); + GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; + SkString lightFunc; + this->emitLightFunc(&le, uniformHandler, fragBuilder, &lightFunc); + const GrShaderVar gSobelArgs[] = { + GrShaderVar("a", SkSLType::kHalf), + GrShaderVar("b", SkSLType::kHalf), + GrShaderVar("c", SkSLType::kHalf), + GrShaderVar("d", SkSLType::kHalf), + GrShaderVar("e", SkSLType::kHalf), + GrShaderVar("f", SkSLType::kHalf), + GrShaderVar("scale", SkSLType::kHalf), + }; + + SkString sobelFuncName = fragBuilder->getMangledFunctionName("sobel"); + fragBuilder->emitFunction(SkSLType::kHalf, + sobelFuncName.c_str(), + {gSobelArgs, std::size(gSobelArgs)}, + "return (-a + b - 2.0 * c + 2.0 * d -e + f) * scale;"); + const GrShaderVar gPointToNormalArgs[] = { + GrShaderVar("x", SkSLType::kHalf), + GrShaderVar("y", SkSLType::kHalf), + GrShaderVar("scale", SkSLType::kHalf), + }; + SkString pointToNormalName = fragBuilder->getMangledFunctionName("pointToNormal"); + fragBuilder->emitFunction(SkSLType::kHalf3, + pointToNormalName.c_str(), + {gPointToNormalArgs, std::size(gPointToNormalArgs)}, + "return normalize(half3(-x * scale, -y * scale, 1));"); + + const GrShaderVar gInteriorNormalArgs[] = { + GrShaderVar("m", SkSLType::kHalf, 9), + GrShaderVar("surfaceScale", SkSLType::kHalf), + }; + SkString normalBody = emitNormalFunc(le.boundaryMode(), + pointToNormalName.c_str(), + sobelFuncName.c_str()); + SkString normalName = fragBuilder->getMangledFunctionName("normal"); + fragBuilder->emitFunction(SkSLType::kHalf3, + normalName.c_str(), + {gInteriorNormalArgs, std::size(gInteriorNormalArgs)}, + normalBody.c_str()); + + fragBuilder->codeAppendf("float2 coord = %s;", args.fSampleCoord); + fragBuilder->codeAppend("half m[9];"); + + const char* surfScale = uniformHandler->getUniformCStr(fSurfaceScaleUni); + + int index = 0; + for (int dy = -1; dy <= 1; ++dy) { + for (int dx = -1; dx <= 1; ++dx) { + SkString texCoords; + texCoords.appendf("coord + half2(%d, %d)", dx, dy); + auto sample = this->invokeChild(0, args, texCoords.c_str()); + fragBuilder->codeAppendf("m[%d] = %s.a;", index, sample.c_str()); + index++; + } + } + fragBuilder->codeAppend("half3 surfaceToLight = "); + SkString arg; + arg.appendf("%s * m[4]", surfScale); + fLight->emitSurfaceToLight(&le, uniformHandler, fragBuilder, arg.c_str()); + fragBuilder->codeAppend(";"); + fragBuilder->codeAppendf("return %s(%s(m, %s), surfaceToLight, ", + lightFunc.c_str(), normalName.c_str(), surfScale); + fLight->emitLightColor(&le, uniformHandler, fragBuilder, "surfaceToLight"); + fragBuilder->codeAppend(");"); +} + +void LightingEffect::ImplBase::onSetData(const GrGLSLProgramDataManager& pdman, + const GrFragmentProcessor& proc) { + const LightingEffect& lighting = proc.cast(); + if (!fLight) { + fLight = lighting.light()->createGpuLight(); + } + + pdman.set1f(fSurfaceScaleUni, lighting.surfaceScale()); + sk_sp transformedLight( + lighting.light()->transform(lighting.filterMatrix())); + fLight->setData(pdman, transformedLight.get()); +} + +/////////////////////////////////////////////////////////////////////////////// + +/////////////////////////////////////////////////////////////////////////////// + +void DiffuseLightingEffect::Impl::emitLightFunc(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler, + GrGLSLFPFragmentBuilder* fragBuilder, + SkString* funcName) { + const char* kd; + fKDUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf, "KD", &kd); + + const GrShaderVar gLightArgs[] = { + GrShaderVar("normal", SkSLType::kHalf3), + GrShaderVar("surfaceToLight", SkSLType::kHalf3), + GrShaderVar("lightColor", SkSLType::kHalf3) + }; + SkString lightBody; + lightBody.appendf("half colorScale = %s * dot(normal, surfaceToLight);", kd); + lightBody.appendf("return half4(saturate(lightColor * colorScale), 1.0);"); + *funcName = fragBuilder->getMangledFunctionName("light"); + fragBuilder->emitFunction(SkSLType::kHalf4, + funcName->c_str(), + {gLightArgs, std::size(gLightArgs)}, + lightBody.c_str()); +} + +void DiffuseLightingEffect::Impl::onSetData(const GrGLSLProgramDataManager& pdman, + const GrFragmentProcessor& proc) { + INHERITED::onSetData(pdman, proc); + const DiffuseLightingEffect& diffuse = proc.cast(); + pdman.set1f(fKDUni, diffuse.fKD); +} + +/////////////////////////////////////////////////////////////////////////////// + +SpecularLightingEffect::SpecularLightingEffect(GrSurfaceProxyView view, + const SkIPoint& viewOffset, + sk_sp light, + SkScalar surfaceScale, + const SkMatrix& matrix, + SkScalar ks, + SkScalar shininess, + BoundaryMode boundaryMode, + const SkIRect* srcBounds, + const GrCaps& caps) + : INHERITED(kGrSpecularLightingEffect_ClassID, + std::move(view), + viewOffset, + std::move(light), + surfaceScale, + matrix, + boundaryMode, + srcBounds, + caps) + , fKS(ks) + , fShininess(shininess) {} + +SpecularLightingEffect::SpecularLightingEffect(const SpecularLightingEffect& that) + : INHERITED(that), fKS(that.fKS), fShininess(that.fShininess) {} + +bool SpecularLightingEffect::onIsEqual(const GrFragmentProcessor& sBase) const { + const SpecularLightingEffect& s = sBase.cast(); + return INHERITED::onIsEqual(sBase) && this->fKS == s.fKS && this->fShininess == s.fShininess; +} + +std::unique_ptr +SpecularLightingEffect::onMakeProgramImpl() const { return std::make_unique(); } + +GR_DEFINE_FRAGMENT_PROCESSOR_TEST(SpecularLightingEffect) + +#if GR_TEST_UTILS +std::unique_ptr SpecularLightingEffect::TestCreate(GrProcessorTestData* d) { + auto [view, ct, at] = d->randomView(); + SkScalar surfaceScale = d->fRandom->nextSScalar1(); + SkScalar ks = d->fRandom->nextUScalar1(); + SkScalar shininess = d->fRandom->nextUScalar1(); + sk_sp light(create_random_light(d->fRandom)); + SkMatrix matrix; + for (int i = 0; i < 9; i++) { + matrix[i] = d->fRandom->nextUScalar1(); + } + BoundaryMode mode = static_cast(d->fRandom->nextU() % kBoundaryModeCount); + + uint32_t boundsX = d->fRandom->nextRangeU(0, view.width()); + uint32_t boundsY = d->fRandom->nextRangeU(0, view.height()); + uint32_t boundsW = d->fRandom->nextRangeU(0, view.width()); + uint32_t boundsH = d->fRandom->nextRangeU(0, view.height()); + SkIRect srcBounds = SkIRect::MakeXYWH(boundsX, boundsY, boundsW, boundsH); + + return SpecularLightingEffect::Make(std::move(view), + SkIPoint(), + std::move(light), + surfaceScale, + matrix, + ks, + shininess, + mode, + &srcBounds, + *d->caps()); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +void SpecularLightingEffect::Impl::emitLightFunc(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler, + GrGLSLFPFragmentBuilder* fragBuilder, + SkString* funcName) { + const char* ks; + const char* shininess; + + fKSUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf, "KS", &ks); + fShininessUni = uniformHandler->addUniform(owner, + kFragment_GrShaderFlag, + SkSLType::kHalf, + "Shininess", + &shininess); + + const GrShaderVar gLightArgs[] = { + GrShaderVar("normal", SkSLType::kHalf3), + GrShaderVar("surfaceToLight", SkSLType::kHalf3), + GrShaderVar("lightColor", SkSLType::kHalf3) + }; + SkString lightBody; + lightBody.appendf("half3 halfDir = half3(normalize(surfaceToLight + half3(0, 0, 1)));"); + lightBody.appendf("half colorScale = half(%s * pow(dot(normal, halfDir), %s));", + ks, shininess); + lightBody.appendf("half3 color = saturate(lightColor * colorScale);"); + lightBody.appendf("return half4(color, max(max(color.r, color.g), color.b));"); + *funcName = fragBuilder->getMangledFunctionName("light"); + fragBuilder->emitFunction(SkSLType::kHalf4, + funcName->c_str(), + {gLightArgs, std::size(gLightArgs)}, + lightBody.c_str()); +} + +void SpecularLightingEffect::Impl::onSetData(const GrGLSLProgramDataManager& pdman, + const GrFragmentProcessor& effect) { + INHERITED::onSetData(pdman, effect); + const SpecularLightingEffect& spec = effect.cast(); + pdman.set1f(fKSUni, spec.fKS); + pdman.set1f(fShininessUni, spec.fShininess); +} + +/////////////////////////////////////////////////////////////////////////////// +void GpuLight::emitLightColorUniform(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler) { + fColorUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf3, + "LightColor"); +} + +void GpuLight::emitLightColor(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler, + GrGLSLFPFragmentBuilder* fragBuilder, + const char* surfaceToLight) { + fragBuilder->codeAppend(uniformHandler->getUniformCStr(this->lightColorUni())); +} + +void GpuLight::setData(const GrGLSLProgramDataManager& pdman, + const SkImageFilterLight* light) const { + setUniformPoint3(pdman, fColorUni, + light->color().makeScale(SkScalarInvert(SkIntToScalar(255)))); +} + +/////////////////////////////////////////////////////////////////////////////// + +void GpuDistantLight::setData(const GrGLSLProgramDataManager& pdman, + const SkImageFilterLight* light) const { + INHERITED::setData(pdman, light); + SkASSERT(light->type() == SkImageFilterLight::kDistant_LightType); + const SkDistantLight* distantLight = static_cast(light); + setUniformNormal3(pdman, fDirectionUni, distantLight->direction()); +} + +void GpuDistantLight::emitSurfaceToLight(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler, + GrGLSLFPFragmentBuilder* fragBuilder, + const char* z) { + const char* dir; + fDirectionUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf3, + "LightDirection", &dir); + fragBuilder->codeAppend(dir); +} + +/////////////////////////////////////////////////////////////////////////////// + +void GpuPointLight::setData(const GrGLSLProgramDataManager& pdman, + const SkImageFilterLight* light) const { + INHERITED::setData(pdman, light); + SkASSERT(light->type() == SkImageFilterLight::kPoint_LightType); + const SkPointLight* pointLight = static_cast(light); + setUniformPoint3(pdman, fLocationUni, pointLight->location()); +} + +void GpuPointLight::emitSurfaceToLight(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler, + GrGLSLFPFragmentBuilder* fragBuilder, + const char* z) { + const char* loc; + fLocationUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf3, + "LightLocation", &loc); + fragBuilder->codeAppendf("normalize(%s - half3(sk_FragCoord.xy, %s))", + loc, z); +} + +/////////////////////////////////////////////////////////////////////////////// + +void GpuSpotLight::setData(const GrGLSLProgramDataManager& pdman, + const SkImageFilterLight* light) const { + INHERITED::setData(pdman, light); + SkASSERT(light->type() == SkImageFilterLight::kSpot_LightType); + const SkSpotLight* spotLight = static_cast(light); + setUniformPoint3(pdman, fLocationUni, spotLight->location()); + pdman.set1f(fExponentUni, spotLight->specularExponent()); + pdman.set1f(fCosInnerConeAngleUni, spotLight->cosInnerConeAngle()); + pdman.set1f(fCosOuterConeAngleUni, spotLight->cosOuterConeAngle()); + pdman.set1f(fConeScaleUni, spotLight->coneScale()); + setUniformNormal3(pdman, fSUni, spotLight->s()); +} + +void GpuSpotLight::emitSurfaceToLight(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler, + GrGLSLFPFragmentBuilder* fragBuilder, + const char* z) { + const char* location; + fLocationUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf3, + "LightLocation", &location); + + fragBuilder->codeAppendf("normalize(%s - half3(sk_FragCoord.xy, %s))", + location, z); +} + +void GpuSpotLight::emitLightColor(const GrFragmentProcessor* owner, + GrGLSLUniformHandler* uniformHandler, + GrGLSLFPFragmentBuilder* fragBuilder, + const char* surfaceToLight) { + const char* color = uniformHandler->getUniformCStr(this->lightColorUni()); // created by parent class. + + const char* exponent; + const char* cosInner; + const char* cosOuter; + const char* coneScale; + const char* s; + fExponentUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf, + "Exponent", &exponent); + fCosInnerConeAngleUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, + SkSLType::kHalf, "CosInnerConeAngle", + &cosInner); + fCosOuterConeAngleUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, + SkSLType::kHalf, "CosOuterConeAngle", + &cosOuter); + fConeScaleUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf, + "ConeScale", &coneScale); + fSUni = uniformHandler->addUniform(owner, kFragment_GrShaderFlag, SkSLType::kHalf3, "S", &s); + + const GrShaderVar gLightColorArgs[] = { + GrShaderVar("surfaceToLight", SkSLType::kHalf3) + }; + SkString lightColorBody; + lightColorBody.appendf("half cosAngle = -dot(surfaceToLight, %s);", s); + lightColorBody.appendf("if (cosAngle < %s) {", cosOuter); + lightColorBody.appendf("return half3(0);"); + lightColorBody.appendf("}"); + lightColorBody.appendf("half scale = pow(cosAngle, %s);", exponent); + lightColorBody.appendf("if (cosAngle < %s) {", cosInner); + lightColorBody.appendf("return %s * scale * (cosAngle - %s) * %s;", + color, cosOuter, coneScale); + lightColorBody.appendf("}"); + lightColorBody.appendf("return %s * scale;", color); + fLightColorFunc = fragBuilder->getMangledFunctionName("lightColor"); + fragBuilder->emitFunction(SkSLType::kHalf3, + fLightColorFunc.c_str(), + {gLightColorArgs, std::size(gLightColorArgs)}, + lightColorBody.c_str()); + + fragBuilder->codeAppendf("%s(%s)", fLightColorFunc.c_str(), surfaceToLight); +} + +#endif diff --git a/gfx/skia/skia/src/effects/imagefilters/SkMagnifierImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkMagnifierImageFilter.cpp new file mode 100644 index 0000000000..6220434ec1 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkMagnifierImageFilter.cpp @@ -0,0 +1,296 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorType.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkM44.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/base/SkTPin.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkValidationUtils.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include + +#if defined(SK_GANESH) +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#endif + +namespace { + +class SkMagnifierImageFilter final : public SkImageFilter_Base { +public: + SkMagnifierImageFilter(const SkRect& srcRect, SkScalar inset, sk_sp input, + const SkRect* cropRect) + : INHERITED(&input, 1, cropRect) + , fSrcRect(srcRect) + , fInset(inset) { + SkASSERT(srcRect.left() >= 0 && srcRect.top() >= 0 && inset >= 0); + } + +protected: + void flatten(SkWriteBuffer&) const override; + + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + +private: + friend void ::SkRegisterMagnifierImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkMagnifierImageFilter) + + SkRect fSrcRect; + SkScalar fInset; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Magnifier( + const SkRect& srcRect, SkScalar inset, sk_sp input, + const CropRect& cropRect) { + if (!SkScalarIsFinite(inset) || !SkIsValidRect(srcRect)) { + return nullptr; + } + if (inset < 0) { + return nullptr; + } + // Negative numbers in src rect are not supported + if (srcRect.fLeft < 0 || srcRect.fTop < 0) { + return nullptr; + } + return sk_sp(new SkMagnifierImageFilter(srcRect, inset, std::move(input), + cropRect)); +} + +void SkRegisterMagnifierImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkMagnifierImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkMagnifierImageFilterImpl", SkMagnifierImageFilter::CreateProc); +} + +sk_sp SkMagnifierImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkRect src; + buffer.readRect(&src); + return SkImageFilters::Magnifier(src, buffer.readScalar(), common.getInput(0), + common.cropRect()); +} + +void SkMagnifierImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeRect(fSrcRect); + buffer.writeScalar(fInset); +} + +//////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) +static std::unique_ptr make_magnifier_fp( + std::unique_ptr input, + SkIRect bounds, + SkRect srcRect, + float xInvZoom, + float yInvZoom, + float xInvInset, + float yInvInset) { + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform shader src;" + "uniform float4 boundsUniform;" + "uniform float xInvZoom;" + "uniform float yInvZoom;" + "uniform float xInvInset;" + "uniform float yInvInset;" + "uniform half2 offset;" + + "half4 main(float2 coord) {" + "float2 zoom_coord = offset + coord * float2(xInvZoom, yInvZoom);" + "float2 delta = (coord - boundsUniform.xy) * boundsUniform.zw;" + "delta = min(delta, float2(1.0) - delta);" + "delta *= float2(xInvInset, yInvInset);" + + "float weight = 0.0;" + "if (delta.s < 2.0 && delta.t < 2.0) {" + "delta = float2(2.0) - delta;" + "float dist = length(delta);" + "dist = max(2.0 - dist, 0.0);" + "weight = min(dist * dist, 1.0);" + "} else {" + "float2 delta_squared = delta * delta;" + "weight = min(min(delta_squared.x, delta_squared.y), 1.0);" + "}" + + "return src.eval(mix(coord, zoom_coord, weight));" + "}" + ); + + SkV4 boundsUniform = {static_cast(bounds.x()), + static_cast(bounds.y()), + 1.f / bounds.width(), + 1.f / bounds.height()}; + + return GrSkSLFP::Make(effect, "magnifier_fp", /*inputFP=*/nullptr, GrSkSLFP::OptFlags::kNone, + "src", std::move(input), + "boundsUniform", boundsUniform, + "xInvZoom", xInvZoom, + "yInvZoom", yInvZoom, + "xInvInset", xInvInset, + "yInvInset", yInvInset, + "offset", SkV2{srcRect.x(), srcRect.y()}); +} +#endif + +sk_sp SkMagnifierImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + const SkIRect inputBounds = SkIRect::MakeXYWH(inputOffset.x(), inputOffset.y(), + input->width(), input->height()); + + SkIRect bounds; + if (!this->applyCropRect(ctx, inputBounds, &bounds)) { + return nullptr; + } + + SkScalar invInset = fInset > 0 ? SkScalarInvert(fInset) : SK_Scalar1; + + SkScalar invXZoom = fSrcRect.width() / bounds.width(); + SkScalar invYZoom = fSrcRect.height() / bounds.height(); + + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + auto context = ctx.getContext(); + + GrSurfaceProxyView inputView = input->view(context); + SkASSERT(inputView.asTextureProxy()); + + const auto isProtected = inputView.proxy()->isProtected(); + const auto origin = inputView.origin(); + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + bounds.offset(-inputOffset); + + // Map bounds and srcRect into the proxy space. Due to the zoom effect, + // it's not just an offset for fSrcRect. + bounds.offset(input->subset().x(), input->subset().y()); + SkRect srcRect = fSrcRect.makeOffset((1.f - invXZoom) * input->subset().x(), + (1.f - invYZoom) * input->subset().y()); + auto inputFP = GrTextureEffect::Make(std::move(inputView), kPremul_SkAlphaType); + + auto fp = make_magnifier_fp(std::move(inputFP), + bounds, + srcRect, + invXZoom, + invYZoom, + bounds.width() * invInset, + bounds.height() * invInset); + + fp = GrColorSpaceXformEffect::Make(std::move(fp), + input->getColorSpace(), input->alphaType(), + ctx.colorSpace(), kPremul_SkAlphaType); + if (!fp) { + return nullptr; + } + + return DrawWithFP(context, std::move(fp), bounds, ctx.colorType(), ctx.colorSpace(), + ctx.surfaceProps(), origin, isProtected); + } +#endif + + SkBitmap inputBM; + + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if ((inputBM.colorType() != kN32_SkColorType) || + (fSrcRect.width() >= inputBM.width()) || (fSrcRect.height() >= inputBM.height())) { + return nullptr; + } + + SkASSERT(inputBM.getPixels()); + if (!inputBM.getPixels() || inputBM.width() <= 0 || inputBM.height() <= 0) { + return nullptr; + } + + const SkImageInfo info = SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()); + + SkBitmap dst; + if (!dst.tryAllocPixels(info)) { + return nullptr; + } + + SkColor* dptr = dst.getAddr32(0, 0); + int dstWidth = dst.width(), dstHeight = dst.height(); + for (int y = 0; y < dstHeight; ++y) { + for (int x = 0; x < dstWidth; ++x) { + SkScalar x_dist = std::min(x, dstWidth - x - 1) * invInset; + SkScalar y_dist = std::min(y, dstHeight - y - 1) * invInset; + SkScalar weight = 0; + + static const SkScalar kScalar2 = SkScalar(2); + + // To create a smooth curve at the corners, we need to work on + // a square twice the size of the inset. + if (x_dist < kScalar2 && y_dist < kScalar2) { + x_dist = kScalar2 - x_dist; + y_dist = kScalar2 - y_dist; + + SkScalar dist = SkScalarSqrt(SkScalarSquare(x_dist) + + SkScalarSquare(y_dist)); + dist = std::max(kScalar2 - dist, 0.0f); + // SkTPin rather than std::max to handle potential NaN + weight = SkTPin(SkScalarSquare(dist), 0.0f, SK_Scalar1); + } else { + SkScalar sqDist = std::min(SkScalarSquare(x_dist), + SkScalarSquare(y_dist)); + // SkTPin rather than std::max to handle potential NaN + weight = SkTPin(sqDist, 0.0f, SK_Scalar1); + } + + SkScalar x_interp = weight * (fSrcRect.x() + x * invXZoom) + (1 - weight) * x; + SkScalar y_interp = weight * (fSrcRect.y() + y * invYZoom) + (1 - weight) * y; + + int x_val = SkTPin(bounds.x() + SkScalarFloorToInt(x_interp), 0, inputBM.width() - 1); + int y_val = SkTPin(bounds.y() + SkScalarFloorToInt(y_interp), 0, inputBM.height() - 1); + + *dptr = *inputBM.getAddr32(x_val, y_val); + dptr++; + } + } + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()), + dst, ctx.surfaceProps()); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkMatrixConvolutionImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkMatrixConvolutionImageFilter.cpp new file mode 100644 index 0000000000..90833e1052 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkMatrixConvolutionImageFilter.cpp @@ -0,0 +1,529 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorPriv.h" +#include "include/core/SkColorType.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkTileMode.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include +class SkMatrix; + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/effects/GrMatrixConvolutionEffect.h" +#endif + +using namespace skia_private; + +namespace { + +class SkMatrixConvolutionImageFilter final : public SkImageFilter_Base { +public: + SkMatrixConvolutionImageFilter(const SkISize& kernelSize, const SkScalar* kernel, + SkScalar gain, SkScalar bias, const SkIPoint& kernelOffset, + SkTileMode tileMode, bool convolveAlpha, + sk_sp input, const SkRect* cropRect) + : INHERITED(&input, 1, cropRect) + , fKernelSize(kernelSize) + , fGain(gain) + , fBias(bias) + , fKernelOffset(kernelOffset) + , fTileMode(tileMode) + , fConvolveAlpha(convolveAlpha) { + size_t size = (size_t) sk_64_mul(fKernelSize.width(), fKernelSize.height()); + fKernel = new SkScalar[size]; + memcpy(fKernel, kernel, size * sizeof(SkScalar)); + SkASSERT(kernelSize.fWidth >= 1 && kernelSize.fHeight >= 1); + SkASSERT(kernelOffset.fX >= 0 && kernelOffset.fX < kernelSize.fWidth); + SkASSERT(kernelOffset.fY >= 0 && kernelOffset.fY < kernelSize.fHeight); + } + + ~SkMatrixConvolutionImageFilter() override { + delete[] fKernel; + } + +protected: + + void flatten(SkWriteBuffer&) const override; + + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + bool onAffectsTransparentBlack() const override; + +private: + friend void ::SkRegisterMatrixConvolutionImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkMatrixConvolutionImageFilter) + + SkISize fKernelSize; + SkScalar* fKernel; + SkScalar fGain; + SkScalar fBias; + SkIPoint fKernelOffset; + SkTileMode fTileMode; + bool fConvolveAlpha; + + template + void filterPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + SkIRect rect, + const SkIRect& bounds) const; + template + void filterPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + const SkIRect& rect, + const SkIRect& bounds) const; + void filterInteriorPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + const SkIRect& rect, + const SkIRect& bounds) const; + void filterBorderPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + const SkIRect& rect, + const SkIRect& bounds) const; + + using INHERITED = SkImageFilter_Base; +}; + +class UncheckedPixelFetcher { +public: + static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { + return *src.getAddr32(x, y); + } +}; + +class ClampPixelFetcher { +public: + static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { + x = SkTPin(x, bounds.fLeft, bounds.fRight - 1); + y = SkTPin(y, bounds.fTop, bounds.fBottom - 1); + return *src.getAddr32(x, y); + } +}; + +class RepeatPixelFetcher { +public: + static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { + x = (x - bounds.left()) % bounds.width() + bounds.left(); + y = (y - bounds.top()) % bounds.height() + bounds.top(); + if (x < bounds.left()) { + x += bounds.width(); + } + if (y < bounds.top()) { + y += bounds.height(); + } + return *src.getAddr32(x, y); + } +}; + +class ClampToBlackPixelFetcher { +public: + static inline SkPMColor fetch(const SkBitmap& src, int x, int y, const SkIRect& bounds) { + if (x < bounds.fLeft || x >= bounds.fRight || y < bounds.fTop || y >= bounds.fBottom) { + return 0; + } else { + return *src.getAddr32(x, y); + } + } +}; + +} // end namespace + +sk_sp SkImageFilters::MatrixConvolution(const SkISize& kernelSize, + const SkScalar kernel[], + SkScalar gain, + SkScalar bias, + const SkIPoint& kernelOffset, + SkTileMode tileMode, + bool convolveAlpha, + sk_sp input, + const CropRect& cropRect) { + // We need to be able to read at most SK_MaxS32 bytes, so divide that + // by the size of a scalar to know how many scalars we can read. + static constexpr int32_t kMaxKernelSize = SK_MaxS32 / sizeof(SkScalar); + + if (kernelSize.width() < 1 || kernelSize.height() < 1) { + return nullptr; + } + if (kMaxKernelSize / kernelSize.fWidth < kernelSize.fHeight) { + return nullptr; + } + if (!kernel) { + return nullptr; + } + if ((kernelOffset.fX < 0) || (kernelOffset.fX >= kernelSize.fWidth) || + (kernelOffset.fY < 0) || (kernelOffset.fY >= kernelSize.fHeight)) { + return nullptr; + } + return sk_sp(new SkMatrixConvolutionImageFilter( + kernelSize, kernel, gain, bias, kernelOffset, tileMode, convolveAlpha, + std::move(input), cropRect)); +} + +void SkRegisterMatrixConvolutionImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkMatrixConvolutionImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkMatrixConvolutionImageFilterImpl", + SkMatrixConvolutionImageFilter::CreateProc); +} + +sk_sp SkMatrixConvolutionImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + + SkISize kernelSize; + kernelSize.fWidth = buffer.readInt(); + kernelSize.fHeight = buffer.readInt(); + const int count = buffer.getArrayCount(); + + const int64_t kernelArea = sk_64_mul(kernelSize.width(), kernelSize.height()); + if (!buffer.validate(kernelArea == count)) { + return nullptr; + } + if (!buffer.validateCanReadN(count)) { + return nullptr; + } + AutoSTArray<16, SkScalar> kernel(count); + if (!buffer.readScalarArray(kernel.get(), count)) { + return nullptr; + } + SkScalar gain = buffer.readScalar(); + SkScalar bias = buffer.readScalar(); + SkIPoint kernelOffset; + kernelOffset.fX = buffer.readInt(); + kernelOffset.fY = buffer.readInt(); + + SkTileMode tileMode = buffer.read32LE(SkTileMode::kLastTileMode); + bool convolveAlpha = buffer.readBool(); + + if (!buffer.isValid()) { + return nullptr; + } + return SkImageFilters::MatrixConvolution( + kernelSize, kernel.get(), gain, bias, kernelOffset, tileMode, + convolveAlpha, common.getInput(0), common.cropRect()); +} + +void SkMatrixConvolutionImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeInt(fKernelSize.fWidth); + buffer.writeInt(fKernelSize.fHeight); + buffer.writeScalarArray(fKernel, fKernelSize.fWidth * fKernelSize.fHeight); + buffer.writeScalar(fGain); + buffer.writeScalar(fBias); + buffer.writeInt(fKernelOffset.fX); + buffer.writeInt(fKernelOffset.fY); + buffer.writeInt((int) fTileMode); + buffer.writeBool(fConvolveAlpha); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +template +void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + SkIRect rect, + const SkIRect& bounds) const { + if (!rect.intersect(bounds)) { + return; + } + for (int y = rect.fTop; y < rect.fBottom; ++y) { + SkPMColor* dptr = result->getAddr32(rect.fLeft - offset.fX, y - offset.fY); + for (int x = rect.fLeft; x < rect.fRight; ++x) { + SkScalar sumA = 0, sumR = 0, sumG = 0, sumB = 0; + for (int cy = 0; cy < fKernelSize.fHeight; cy++) { + for (int cx = 0; cx < fKernelSize.fWidth; cx++) { + SkPMColor s = PixelFetcher::fetch(src, + x + cx - fKernelOffset.fX, + y + cy - fKernelOffset.fY, + bounds); + SkScalar k = fKernel[cy * fKernelSize.fWidth + cx]; + if (convolveAlpha) { + sumA += SkGetPackedA32(s) * k; + } + sumR += SkGetPackedR32(s) * k; + sumG += SkGetPackedG32(s) * k; + sumB += SkGetPackedB32(s) * k; + } + } + int a = convolveAlpha + ? SkTPin(SkScalarFloorToInt(sumA * fGain + fBias), 0, 255) + : 255; + int r = SkTPin(SkScalarFloorToInt(sumR * fGain + fBias), 0, a); + int g = SkTPin(SkScalarFloorToInt(sumG * fGain + fBias), 0, a); + int b = SkTPin(SkScalarFloorToInt(sumB * fGain + fBias), 0, a); + if (!convolveAlpha) { + a = SkGetPackedA32(PixelFetcher::fetch(src, x, y, bounds)); + *dptr++ = SkPreMultiplyARGB(a, r, g, b); + } else { + *dptr++ = SkPackARGB32(a, r, g, b); + } + } + } +} + +template +void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + const SkIRect& rect, + const SkIRect& bounds) const { + if (fConvolveAlpha) { + filterPixels(src, result, offset, rect, bounds); + } else { + filterPixels(src, result, offset, rect, bounds); + } +} + +void SkMatrixConvolutionImageFilter::filterInteriorPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + const SkIRect& rect, + const SkIRect& bounds) const { + switch (fTileMode) { + case SkTileMode::kMirror: + // TODO (michaelludwig) - Implement mirror tiling, treat as repeat for now. + case SkTileMode::kRepeat: + // In repeat mode, we still need to wrap the samples around the src + filterPixels(src, result, offset, rect, bounds); + break; + case SkTileMode::kClamp: + // Fall through + case SkTileMode::kDecal: + filterPixels(src, result, offset, rect, bounds); + break; + } +} + +void SkMatrixConvolutionImageFilter::filterBorderPixels(const SkBitmap& src, + SkBitmap* result, + SkIVector& offset, + const SkIRect& rect, + const SkIRect& srcBounds) const { + switch (fTileMode) { + case SkTileMode::kClamp: + filterPixels(src, result, offset, rect, srcBounds); + break; + case SkTileMode::kMirror: + // TODO (michaelludwig) - Implement mirror tiling, treat as repeat for now. + case SkTileMode::kRepeat: + filterPixels(src, result, offset, rect, srcBounds); + break; + case SkTileMode::kDecal: + filterPixels(src, result, offset, rect, srcBounds); + break; + } +} + +sk_sp SkMatrixConvolutionImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + SkIRect dstBounds; + input = this->applyCropRectAndPad(this->mapContext(ctx), input.get(), &inputOffset, &dstBounds); + if (!input) { + return nullptr; + } + + const SkIRect originalSrcBounds = SkIRect::MakeXYWH(inputOffset.fX, inputOffset.fY, + input->width(), input->height()); + + SkIRect srcBounds = this->onFilterNodeBounds(dstBounds, ctx.ctm(), kReverse_MapDirection, + &originalSrcBounds); + + if (SkTileMode::kRepeat == fTileMode || SkTileMode::kMirror == fTileMode) { + srcBounds = DetermineRepeatedSrcBound(srcBounds, fKernelOffset, + fKernelSize, originalSrcBounds); + } else { + if (!srcBounds.intersect(dstBounds)) { + return nullptr; + } + } + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + auto context = ctx.getContext(); + + // Ensure the input is in the destination color space. Typically applyCropRect will have + // called pad_image to account for our dilation of bounds, so the result will already be + // moved to the destination color space. If a filter DAG avoids that, then we use this + // fall-back, which saves us from having to do the xform during the filter itself. + input = ImageToColorSpace(input.get(), ctx.colorType(), ctx.colorSpace(), + ctx.surfaceProps()); + + GrSurfaceProxyView inputView = input->view(context); + SkASSERT(inputView.asTextureProxy()); + + const auto isProtected = inputView.proxy()->isProtected(); + const auto origin = inputView.origin(); + + offset->fX = dstBounds.left(); + offset->fY = dstBounds.top(); + dstBounds.offset(-inputOffset); + srcBounds.offset(-inputOffset); + // Map srcBounds from input's logical image domain to that of the proxy + srcBounds.offset(input->subset().x(), input->subset().y()); + + auto fp = GrMatrixConvolutionEffect::Make(context, + std::move(inputView), + srcBounds, + fKernelSize, + fKernel, + fGain, + fBias, + fKernelOffset, + SkTileModeToWrapMode(fTileMode), + fConvolveAlpha, + *ctx.getContext()->priv().caps()); + if (!fp) { + return nullptr; + } + + // FIXME (michaelludwig) - Clean this up as part of the imagefilter refactor, some filters + // instead require a coord transform on the FP. At very least, be consistent, at best make + // it so that filter impls don't need to worry about the subset origin. + + // Must also map the dstBounds since it is used as the src rect in DrawWithFP when + // evaluating the FP, and the dst rect just uses the size of dstBounds. + dstBounds.offset(input->subset().x(), input->subset().y()); + return DrawWithFP(context, std::move(fp), dstBounds, ctx.colorType(), ctx.colorSpace(), + ctx.surfaceProps(), origin, isProtected); + } +#endif + + SkBitmap inputBM; + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if (inputBM.colorType() != kN32_SkColorType) { + return nullptr; + } + + if (!fConvolveAlpha && !inputBM.isOpaque()) { + // This leaves the bitmap tagged as premul, which seems weird to me, + // but is consistent with old behavior. + inputBM.readPixels(inputBM.info().makeAlphaType(kUnpremul_SkAlphaType), + inputBM.getPixels(), inputBM.rowBytes(), 0,0); + } + + if (!inputBM.getPixels()) { + return nullptr; + } + + const SkImageInfo info = SkImageInfo::MakeN32(dstBounds.width(), dstBounds.height(), + inputBM.alphaType()); + + SkBitmap dst; + if (!dst.tryAllocPixels(info)) { + return nullptr; + } + + offset->fX = dstBounds.fLeft; + offset->fY = dstBounds.fTop; + dstBounds.offset(-inputOffset); + srcBounds.offset(-inputOffset); + + SkIRect interior; + if (SkTileMode::kRepeat == fTileMode || SkTileMode::kMirror == fTileMode) { + // In repeat mode, the filterPixels calls will wrap around + // so we just need to render 'dstBounds' + interior = dstBounds; + } else { + interior = SkIRect::MakeXYWH(dstBounds.left() + fKernelOffset.fX, + dstBounds.top() + fKernelOffset.fY, + dstBounds.width() - fKernelSize.fWidth + 1, + dstBounds.height() - fKernelSize.fHeight + 1); + } + + SkIRect top = SkIRect::MakeLTRB(dstBounds.left(), dstBounds.top(), + dstBounds.right(), interior.top()); + SkIRect bottom = SkIRect::MakeLTRB(dstBounds.left(), interior.bottom(), + dstBounds.right(), dstBounds.bottom()); + SkIRect left = SkIRect::MakeLTRB(dstBounds.left(), interior.top(), + interior.left(), interior.bottom()); + SkIRect right = SkIRect::MakeLTRB(interior.right(), interior.top(), + dstBounds.right(), interior.bottom()); + + SkIVector dstContentOffset = { offset->fX - inputOffset.fX, offset->fY - inputOffset.fY }; + + this->filterBorderPixels(inputBM, &dst, dstContentOffset, top, srcBounds); + this->filterBorderPixels(inputBM, &dst, dstContentOffset, left, srcBounds); + this->filterInteriorPixels(inputBM, &dst, dstContentOffset, interior, srcBounds); + this->filterBorderPixels(inputBM, &dst, dstContentOffset, right, srcBounds); + this->filterBorderPixels(inputBM, &dst, dstContentOffset, bottom, srcBounds); + + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(dstBounds.width(), dstBounds.height()), + dst, ctx.surfaceProps()); +} + +SkIRect SkMatrixConvolutionImageFilter::onFilterNodeBounds( + const SkIRect& src, const SkMatrix& ctm, MapDirection dir, const SkIRect* inputRect) const { + if (kReverse_MapDirection == dir && inputRect && + (SkTileMode::kRepeat == fTileMode || SkTileMode::kMirror == fTileMode)) { + SkASSERT(inputRect); + return DetermineRepeatedSrcBound(src, fKernelOffset, fKernelSize, *inputRect); + } + + SkIRect dst = src; + int w = fKernelSize.width() - 1, h = fKernelSize.height() - 1; + + if (kReverse_MapDirection == dir) { + dst.adjust(-fKernelOffset.fX, -fKernelOffset.fY, + w - fKernelOffset.fX, h - fKernelOffset.fY); + } else { + dst.adjust(fKernelOffset.fX - w, fKernelOffset.fY - h, fKernelOffset.fX, fKernelOffset.fY); + } + return dst; +} + +bool SkMatrixConvolutionImageFilter::onAffectsTransparentBlack() const { + // It seems that the only rational way for repeat sample mode to work is if the caller + // explicitly restricts the input in which case the input range is explicitly known and + // specified. + // TODO: is seems that this should be true for clamp mode too. + + // For the other modes, because the kernel is applied in device-space, we have no idea what + // pixels it will affect in object-space. + return SkTileMode::kRepeat != fTileMode && SkTileMode::kMirror != fTileMode; +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkMatrixTransformImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkMatrixTransformImageFilter.cpp new file mode 100644 index 0000000000..7064906b29 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkMatrixTransformImageFilter.cpp @@ -0,0 +1,184 @@ +/* + * Copyright 2014 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkImageFilterTypes.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSamplingPriv.h" +#include "src/core/SkWriteBuffer.h" +#include "src/effects/imagefilters/SkCropImageFilter.h" + +#include + +struct SkISize; + +namespace { + +class SkMatrixTransformImageFilter final : public SkImageFilter_Base { +public: + // TODO(michaelludwig): Update this to use SkM44. + SkMatrixTransformImageFilter(const SkMatrix& transform, + const SkSamplingOptions& sampling, + sk_sp input) + : SkImageFilter_Base(&input, 1, nullptr) + , fTransform(transform) + , fSampling(sampling) { + // Pre-cache so future calls to fTransform.getType() are threadsafe. + (void) static_cast(fTransform).getType(); + } + + SkRect computeFastBounds(const SkRect&) const override; + +protected: + void flatten(SkWriteBuffer&) const override; + +private: + friend void ::SkRegisterMatrixTransformImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkMatrixTransformImageFilter) + static sk_sp LegacyOffsetCreateProc(SkReadBuffer& buffer); + + MatrixCapability onGetCTMCapability() const override { return MatrixCapability::kComplex; } + + skif::FilterResult onFilterImage(const skif::Context& context) const override; + + skif::LayerSpace onGetInputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds, + VisitChildren recurse) const override; + + skif::LayerSpace onGetOutputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& contentBounds) const override; + + skif::ParameterSpace fTransform; + SkSamplingOptions fSampling; +}; + +} // namespace + +sk_sp SkImageFilters::MatrixTransform(const SkMatrix& transform, + const SkSamplingOptions& sampling, + sk_sp input) { + return sk_sp(new SkMatrixTransformImageFilter(transform, + sampling, + std::move(input))); +} + +sk_sp SkImageFilters::Offset(SkScalar dx, SkScalar dy, + sk_sp input, + const CropRect& cropRect) { + // The legacy ::Offset() implementation rounded its offset vector to layer-space pixels, which + // is roughly equivalent to using nearest-neighbor sampling with the translation matrix. + sk_sp offset = SkImageFilters::MatrixTransform( + SkMatrix::Translate(dx, dy), + SkSamplingOptions{SkFilterMode::kNearest}, + std::move(input)); + // The legacy 'cropRect' applies only to the output of the offset filter. + if (cropRect) { + offset = SkMakeCropImageFilter(*cropRect, std::move(offset)); + } + return offset; +} + +void SkRegisterMatrixTransformImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkMatrixTransformImageFilter); + // TODO(michaelludwig): Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkMatrixImageFilter", SkMatrixTransformImageFilter::CreateProc); + // TODO(michaelludwig): Remove after grace period for SKPs to stop using old serialization + SkFlattenable::Register("SkOffsetImageFilter", + SkMatrixTransformImageFilter::LegacyOffsetCreateProc); + SkFlattenable::Register("SkOffsetImageFilterImpl", + SkMatrixTransformImageFilter::LegacyOffsetCreateProc); +} + +sk_sp SkMatrixTransformImageFilter::LegacyOffsetCreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkPoint offset; + buffer.readPoint(&offset); + return SkImageFilters::Offset(offset.x(), offset.y(), common.getInput(0), common.cropRect()); +} + +sk_sp SkMatrixTransformImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkMatrix matrix; + buffer.readMatrix(&matrix); + + auto sampling = [&]() { + if (buffer.isVersionLT(SkPicturePriv::kMatrixImageFilterSampling_Version)) { + return SkSamplingPriv::FromFQ(buffer.read32LE(kLast_SkLegacyFQ), kLinear_SkMediumAs); + } else { + return buffer.readSampling(); + } + }(); + return SkImageFilters::MatrixTransform(matrix, sampling, common.getInput(0)); +} + +void SkMatrixTransformImageFilter::flatten(SkWriteBuffer& buffer) const { + this->SkImageFilter_Base::flatten(buffer); + buffer.writeMatrix(SkMatrix(fTransform)); + buffer.writeSampling(fSampling); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +skif::FilterResult SkMatrixTransformImageFilter::onFilterImage(const skif::Context& context) const { + skif::FilterResult childOutput = this->filterInput(0, context); + skif::LayerSpace transform = context.mapping().paramToLayer(fTransform); + return childOutput.applyTransform(context, transform, fSampling); +} + +SkRect SkMatrixTransformImageFilter::computeFastBounds(const SkRect& src) const { + SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src; + return static_cast(fTransform).mapRect(bounds); +} + +skif::LayerSpace SkMatrixTransformImageFilter::onGetInputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& desiredOutput, + const skif::LayerSpace& contentBounds, + VisitChildren recurse) const { + // The required input for this filter to cover 'desiredOutput' is the smallest rectangle such + // that after being transformed by the layer-space adjusted 'fTransform', it contains the output + skif::LayerSpace inverse; + if (!mapping.paramToLayer(fTransform).invert(&inverse)) { + return skif::LayerSpace::Empty(); + } + skif::LayerSpace requiredInput = inverse.mapRect(desiredOutput); + + // Additionally if there is any filtering beyond nearest neighbor, we request an extra buffer of + // pixels so that the content is available to the bilerp/bicubic kernel. + if (fSampling != SkSamplingOptions()) { + requiredInput.outset(skif::LayerSpace({1, 1})); + } + + if (recurse == VisitChildren::kNo) { + return requiredInput; + } else { + // Our required input is the desired output for our child image filter. + return this->visitInputLayerBounds(mapping, requiredInput, contentBounds); + } +} + +skif::LayerSpace SkMatrixTransformImageFilter::onGetOutputLayerBounds( + const skif::Mapping& mapping, + const skif::LayerSpace& contentBounds) const { + // The output of this filter is the transformed bounds of its child's output. + skif::LayerSpace childOutput = this->visitOutputLayerBounds(mapping, contentBounds); + return mapping.paramToLayer(fTransform).mapRect(childOutput); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkMergeImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkMergeImageFilter.cpp new file mode 100644 index 0000000000..ff7bf0b85a --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkMergeImageFilter.cpp @@ -0,0 +1,130 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" + +#include + +namespace { + +class SkMergeImageFilter final : public SkImageFilter_Base { +public: + SkMergeImageFilter(sk_sp* const filters, int count, + const SkRect* cropRect) + : INHERITED(filters, count, cropRect) { + SkASSERT(count >= 0); + } + +protected: + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + MatrixCapability onGetCTMCapability() const override { return MatrixCapability::kComplex; } + +private: + friend void ::SkRegisterMergeImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkMergeImageFilter) + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace +sk_sp SkImageFilters::Merge(sk_sp* const filters, int count, + const CropRect& cropRect) { + return sk_sp(new SkMergeImageFilter(filters, count, cropRect)); +} + +void SkRegisterMergeImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkMergeImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkMergeImageFilterImpl", SkMergeImageFilter::CreateProc); +} + +sk_sp SkMergeImageFilter::CreateProc(SkReadBuffer& buffer) { + Common common; + if (!common.unflatten(buffer, -1) || !buffer.isValid()) { + return nullptr; + } + return SkImageFilters::Merge(common.inputs(), common.inputCount(), common.cropRect()); +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkMergeImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + int inputCount = this->countInputs(); + if (inputCount < 1) { + return nullptr; + } + + SkIRect bounds; + bounds.setEmpty(); + + std::unique_ptr[]> inputs(new sk_sp[inputCount]); + std::unique_ptr offsets(new SkIPoint[inputCount]); + + // Filter all of the inputs. + for (int i = 0; i < inputCount; ++i) { + offsets[i] = { 0, 0 }; + inputs[i] = this->filterInput(i, ctx, &offsets[i]); + if (!inputs[i]) { + continue; + } + const SkIRect inputBounds = SkIRect::MakeXYWH(offsets[i].fX, offsets[i].fY, + inputs[i]->width(), inputs[i]->height()); + bounds.join(inputBounds); + } + if (bounds.isEmpty()) { + return nullptr; + } + + // Apply the crop rect to the union of the inputs' bounds. + // Note that the crop rect can only reduce the bounds, since this + // filter does not affect transparent black. + bool embiggen = false; + this->getCropRect().applyTo(bounds, ctx.ctm(), embiggen, &bounds); + if (!bounds.intersect(ctx.clipBounds())) { + return nullptr; + } + + const int x0 = bounds.left(); + const int y0 = bounds.top(); + + sk_sp surf(ctx.makeSurface(bounds.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + canvas->clear(0x0); + + // Composite all of the filter inputs. + for (int i = 0; i < inputCount; ++i) { + if (!inputs[i]) { + continue; + } + + inputs[i]->draw(canvas, + SkIntToScalar(offsets[i].x()) - x0, SkIntToScalar(offsets[i].y()) - y0); + } + + offset->fX = bounds.left(); + offset->fY = bounds.top(); + return surf->makeImageSnapshot(); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkMorphologyImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkMorphologyImageFilter.cpp new file mode 100644 index 0000000000..c11dd5c613 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkMorphologyImageFilter.cpp @@ -0,0 +1,768 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorType.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "include/private/SkColorData.h" +#include "include/private/SkSLSampleUsage.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkSLTypeShared.h" +#include "src/gpu/KeyBuilder.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProcessorUnitTest.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h" +#include "src/gpu/ganesh/glsl/GrGLSLProgramDataManager.h" +#include "src/gpu/ganesh/glsl/GrGLSLUniformHandler.h" + +struct GrShaderCaps; +#endif + +#if GR_TEST_UTILS +#include "src/base/SkRandom.h" +#endif + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #include +#endif + +#if defined(SK_ARM_HAS_NEON) + #include +#endif + +namespace { + +enum class MorphType { + kErode, + kDilate, + kLastType = kDilate +}; + +enum class MorphDirection { kX, kY }; + +class SkMorphologyImageFilter final : public SkImageFilter_Base { +public: + SkMorphologyImageFilter(MorphType type, SkScalar radiusX, SkScalar radiusY, + sk_sp input, const SkRect* cropRect) + : INHERITED(&input, 1, cropRect) + , fType(type) + , fRadius(SkSize::Make(radiusX, radiusY)) {} + + SkRect computeFastBounds(const SkRect& src) const override; + SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + + /** + * All morphology procs have the same signature: src is the source buffer, dst the + * destination buffer, radius is the morphology radius, width and height are the bounds + * of the destination buffer (in pixels), and srcStride and dstStride are the + * number of pixels per row in each buffer. All buffers are 8888. + */ + + typedef void (*Proc)(const SkPMColor* src, SkPMColor* dst, int radius, + int width, int height, int srcStride, int dstStride); + +protected: + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + void flatten(SkWriteBuffer&) const override; + + SkSize mappedRadius(const SkMatrix& ctm) const { + SkVector radiusVector = SkVector::Make(fRadius.width(), fRadius.height()); + ctm.mapVectors(&radiusVector, 1); + radiusVector.setAbs(radiusVector); + return SkSize::Make(radiusVector.x(), radiusVector.y()); + } + +private: + friend void ::SkRegisterMorphologyImageFilterFlattenables(); + + SK_FLATTENABLE_HOOKS(SkMorphologyImageFilter) + + MorphType fType; + SkSize fRadius; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Dilate(SkScalar radiusX, SkScalar radiusY, + sk_sp input, + const CropRect& cropRect) { + if (radiusX < 0 || radiusY < 0) { + return nullptr; + } + return sk_sp(new SkMorphologyImageFilter( + MorphType::kDilate, radiusX, radiusY, std::move(input), cropRect)); +} + +sk_sp SkImageFilters::Erode(SkScalar radiusX, SkScalar radiusY, + sk_sp input, + const CropRect& cropRect) { + if (radiusX < 0 || radiusY < 0) { + return nullptr; + } + return sk_sp(new SkMorphologyImageFilter( + MorphType::kErode, radiusX, radiusY, std::move(input), cropRect)); +} + +void SkRegisterMorphologyImageFilterFlattenables() { + SK_REGISTER_FLATTENABLE(SkMorphologyImageFilter); + // TODO (michaelludwig): Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkMorphologyImageFilterImpl", SkMorphologyImageFilter::CreateProc); +} + +sk_sp SkMorphologyImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + + SkScalar width = buffer.readScalar(); + SkScalar height = buffer.readScalar(); + MorphType filterType = buffer.read32LE(MorphType::kLastType); + + if (filterType == MorphType::kDilate) { + return SkImageFilters::Dilate(width, height, common.getInput(0), common.cropRect()); + } else if (filterType == MorphType::kErode) { + return SkImageFilters::Erode(width, height, common.getInput(0), common.cropRect()); + } else { + return nullptr; + } +} + +void SkMorphologyImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeScalar(fRadius.fWidth); + buffer.writeScalar(fRadius.fHeight); + buffer.writeInt(static_cast(fType)); +} + +/////////////////////////////////////////////////////////////////////////////// + +static void call_proc_X(SkMorphologyImageFilter::Proc procX, + const SkBitmap& src, SkBitmap* dst, + int radiusX, const SkIRect& bounds) { + procX(src.getAddr32(bounds.left(), bounds.top()), dst->getAddr32(0, 0), + radiusX, bounds.width(), bounds.height(), + src.rowBytesAsPixels(), dst->rowBytesAsPixels()); +} + +static void call_proc_Y(SkMorphologyImageFilter::Proc procY, + const SkPMColor* src, int srcRowBytesAsPixels, SkBitmap* dst, + int radiusY, const SkIRect& bounds) { + procY(src, dst->getAddr32(0, 0), + radiusY, bounds.height(), bounds.width(), + srcRowBytesAsPixels, dst->rowBytesAsPixels()); +} + +SkRect SkMorphologyImageFilter::computeFastBounds(const SkRect& src) const { + SkRect bounds = this->getInput(0) ? this->getInput(0)->computeFastBounds(src) : src; + bounds.outset(fRadius.width(), fRadius.height()); + return bounds; +} + +SkIRect SkMorphologyImageFilter::onFilterNodeBounds( + const SkIRect& src, const SkMatrix& ctm, MapDirection, const SkIRect* inputRect) const { + SkSize radius = mappedRadius(ctm); + return src.makeOutset(SkScalarCeilToInt(radius.width()), SkScalarCeilToInt(radius.height())); +} + +#if defined(SK_GANESH) + +/////////////////////////////////////////////////////////////////////////////// +/** + * Morphology effects. Depending upon the type of morphology, either the + * component-wise min (Erode_Type) or max (Dilate_Type) of all pixels in the + * kernel is selected as the new color. The new color is modulated by the input + * color. + */ +class GrMorphologyEffect : public GrFragmentProcessor { +public: + static std::unique_ptr Make( + std::unique_ptr inputFP, GrSurfaceProxyView view, + SkAlphaType srcAlphaType, MorphDirection dir, int radius, MorphType type) { + return std::unique_ptr( + new GrMorphologyEffect(std::move(inputFP), std::move(view), srcAlphaType, dir, + radius, type, /*range=*/nullptr)); + } + + static std::unique_ptr Make( + std::unique_ptr inputFP, GrSurfaceProxyView view, + SkAlphaType srcAlphaType, MorphDirection dir, int radius, MorphType type, + const float range[2]) { + return std::unique_ptr(new GrMorphologyEffect( + std::move(inputFP), std::move(view), srcAlphaType, dir, radius, type, range)); + } + + const char* name() const override { return "Morphology"; } + + std::unique_ptr clone() const override { + return std::unique_ptr(new GrMorphologyEffect(*this)); + } + +private: + MorphDirection fDirection; + int fRadius; + MorphType fType; + bool fUseRange; + float fRange[2]; + + std::unique_ptr onMakeProgramImpl() const override; + + void onAddToKey(const GrShaderCaps&, skgpu::KeyBuilder*) const override; + + bool onIsEqual(const GrFragmentProcessor&) const override; + GrMorphologyEffect(std::unique_ptr inputFP, GrSurfaceProxyView, + SkAlphaType srcAlphaType, MorphDirection, int radius, MorphType, + const float range[2]); + explicit GrMorphologyEffect(const GrMorphologyEffect&); + + GR_DECLARE_FRAGMENT_PROCESSOR_TEST + + using INHERITED = GrFragmentProcessor; +}; + +std::unique_ptr GrMorphologyEffect::onMakeProgramImpl() const { + class Impl : public ProgramImpl { + public: + void emitCode(EmitArgs& args) override { + constexpr int kInputFPIndex = 0; + constexpr int kTexEffectIndex = 1; + + const GrMorphologyEffect& me = args.fFp.cast(); + + GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; + fRangeUni = uniformHandler->addUniform(&me, kFragment_GrShaderFlag, SkSLType::kFloat2, + "Range"); + const char* range = uniformHandler->getUniformCStr(fRangeUni); + + GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; + + const char* func = me.fType == MorphType::kErode ? "min" : "max"; + + char initialValue = me.fType == MorphType::kErode ? '1' : '0'; + fragBuilder->codeAppendf("half4 color = half4(%c);", initialValue); + + char dir = me.fDirection == MorphDirection::kX ? 'x' : 'y'; + + int width = 2 * me.fRadius + 1; + + // float2 coord = coord2D; + fragBuilder->codeAppendf("float2 coord = %s;", args.fSampleCoord); + // coord.x -= radius; + fragBuilder->codeAppendf("coord.%c -= %d;", dir, me.fRadius); + if (me.fUseRange) { + // highBound = min(highBound, coord.x + (width-1)); + fragBuilder->codeAppendf("float highBound = min(%s.y, coord.%c + %f);", range, dir, + float(width - 1)); + // coord.x = max(lowBound, coord.x); + fragBuilder->codeAppendf("coord.%c = max(%s.x, coord.%c);", dir, range, dir); + } + fragBuilder->codeAppendf("for (int i = 0; i < %d; i++) {", width); + SkString sample = this->invokeChild(kTexEffectIndex, args, "coord"); + fragBuilder->codeAppendf(" color = %s(color, %s);", func, sample.c_str()); + // coord.x += 1; + fragBuilder->codeAppendf(" coord.%c += 1;", dir); + if (me.fUseRange) { + // coord.x = min(highBound, coord.x); + fragBuilder->codeAppendf(" coord.%c = min(highBound, coord.%c);", dir, dir); + } + fragBuilder->codeAppend("}"); + + SkString inputColor = this->invokeChild(kInputFPIndex, args); + fragBuilder->codeAppendf("return color * %s;", inputColor.c_str()); + } + + private: + void onSetData(const GrGLSLProgramDataManager& pdman, + const GrFragmentProcessor& proc) override { + const GrMorphologyEffect& m = proc.cast(); + if (m.fUseRange) { + pdman.set2f(fRangeUni, m.fRange[0], m.fRange[1]); + } + } + + GrGLSLProgramDataManager::UniformHandle fRangeUni; + }; + + return std::make_unique(); +} + +void GrMorphologyEffect::onAddToKey(const GrShaderCaps& caps, skgpu::KeyBuilder* b) const { + uint32_t key = static_cast(fRadius); + key |= (static_cast(fType) << 8); + key |= (static_cast(fDirection) << 9); + if (fUseRange) { + key |= 1 << 10; + } + b->add32(key); +} + +GrMorphologyEffect::GrMorphologyEffect(std::unique_ptr inputFP, + GrSurfaceProxyView view, + SkAlphaType srcAlphaType, + MorphDirection direction, + int radius, + MorphType type, + const float range[2]) + : INHERITED(kGrMorphologyEffect_ClassID, ModulateForClampedSamplerOptFlags(srcAlphaType)) + , fDirection(direction) + , fRadius(radius) + , fType(type) + , fUseRange(SkToBool(range)) { + this->setUsesSampleCoordsDirectly(); + this->registerChild(std::move(inputFP)); + this->registerChild(GrTextureEffect::Make(std::move(view), srcAlphaType), + SkSL::SampleUsage::Explicit()); + if (fUseRange) { + fRange[0] = range[0]; + fRange[1] = range[1]; + } +} + +GrMorphologyEffect::GrMorphologyEffect(const GrMorphologyEffect& that) + : INHERITED(that) + , fDirection(that.fDirection) + , fRadius(that.fRadius) + , fType(that.fType) + , fUseRange(that.fUseRange) { + if (that.fUseRange) { + fRange[0] = that.fRange[0]; + fRange[1] = that.fRange[1]; + } +} + +bool GrMorphologyEffect::onIsEqual(const GrFragmentProcessor& sBase) const { + const GrMorphologyEffect& s = sBase.cast(); + return this->fRadius == s.fRadius && + this->fDirection == s.fDirection && + this->fUseRange == s.fUseRange && + this->fType == s.fType; +} + +/////////////////////////////////////////////////////////////////////////////// + +GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrMorphologyEffect) + +#if GR_TEST_UTILS +std::unique_ptr GrMorphologyEffect::TestCreate(GrProcessorTestData* d) { + auto [view, ct, at] = d->randomView(); + + MorphDirection dir = d->fRandom->nextBool() ? MorphDirection::kX : MorphDirection::kY; + static const int kMaxRadius = 10; + int radius = d->fRandom->nextRangeU(1, kMaxRadius); + MorphType type = d->fRandom->nextBool() ? MorphType::kErode : MorphType::kDilate; + return GrMorphologyEffect::Make(d->inputFP(), std::move(view), at, dir, radius, type); +} +#endif + +static void apply_morphology_rect(skgpu::ganesh::SurfaceFillContext* sfc, + GrSurfaceProxyView view, + SkAlphaType srcAlphaType, + const SkIRect& srcRect, + const SkIRect& dstRect, + int radius, + MorphType morphType, + const float range[2], + MorphDirection direction) { + auto fp = GrMorphologyEffect::Make(/*inputFP=*/nullptr, + std::move(view), + srcAlphaType, + direction, + radius, + morphType, + range); + sfc->fillRectToRectWithFP(srcRect, dstRect, std::move(fp)); +} + +static void apply_morphology_rect_no_bounds(skgpu::ganesh::SurfaceFillContext* sfc, + GrSurfaceProxyView view, + SkAlphaType srcAlphaType, + const SkIRect& srcRect, + const SkIRect& dstRect, + int radius, + MorphType morphType, + MorphDirection direction) { + auto fp = GrMorphologyEffect::Make( + /*inputFP=*/nullptr, std::move(view), srcAlphaType, direction, radius, morphType); + sfc->fillRectToRectWithFP(srcRect, dstRect, std::move(fp)); +} + +static void apply_morphology_pass(skgpu::ganesh::SurfaceFillContext* sfc, + GrSurfaceProxyView view, + SkAlphaType srcAlphaType, + const SkIRect& srcRect, + const SkIRect& dstRect, + int radius, + MorphType morphType, + MorphDirection direction) { + float bounds[2] = { 0.0f, 1.0f }; + SkIRect lowerSrcRect = srcRect, lowerDstRect = dstRect; + SkIRect middleSrcRect = srcRect, middleDstRect = dstRect; + SkIRect upperSrcRect = srcRect, upperDstRect = dstRect; + if (direction == MorphDirection::kX) { + bounds[0] = SkIntToScalar(srcRect.left()) + 0.5f; + bounds[1] = SkIntToScalar(srcRect.right()) - 0.5f; + lowerSrcRect.fRight = srcRect.left() + radius; + lowerDstRect.fRight = dstRect.left() + radius; + upperSrcRect.fLeft = srcRect.right() - radius; + upperDstRect.fLeft = dstRect.right() - radius; + middleSrcRect.inset(radius, 0); + middleDstRect.inset(radius, 0); + } else { + bounds[0] = SkIntToScalar(srcRect.top()) + 0.5f; + bounds[1] = SkIntToScalar(srcRect.bottom()) - 0.5f; + lowerSrcRect.fBottom = srcRect.top() + radius; + lowerDstRect.fBottom = dstRect.top() + radius; + upperSrcRect.fTop = srcRect.bottom() - radius; + upperDstRect.fTop = dstRect.bottom() - radius; + middleSrcRect.inset(0, radius); + middleDstRect.inset(0, radius); + } + if (middleSrcRect.width() <= 0) { + // radius covers srcRect; use bounds over entire draw + apply_morphology_rect(sfc, std::move(view), srcAlphaType, srcRect, + dstRect, radius, morphType, bounds, direction); + } else { + // Draw upper and lower margins with bounds; middle without. + apply_morphology_rect(sfc, view, srcAlphaType, lowerSrcRect, + lowerDstRect, radius, morphType, bounds, direction); + apply_morphology_rect(sfc, view, srcAlphaType, upperSrcRect, + upperDstRect, radius, morphType, bounds, direction); + apply_morphology_rect_no_bounds(sfc, std::move(view), srcAlphaType, + middleSrcRect, middleDstRect, radius, morphType, direction); + } +} + +static sk_sp apply_morphology( + GrRecordingContext* rContext, SkSpecialImage* input, const SkIRect& rect, + MorphType morphType, SkISize radius, const SkImageFilter_Base::Context& ctx) { + GrSurfaceProxyView srcView = input->view(rContext); + SkAlphaType srcAlphaType = input->alphaType(); + SkASSERT(srcView.asTextureProxy()); + + GrSurfaceProxy* proxy = srcView.proxy(); + + const SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height()); + SkIRect srcRect = rect; + // Map into proxy space + srcRect.offset(input->subset().x(), input->subset().y()); + SkASSERT(radius.width() > 0 || radius.height() > 0); + + GrImageInfo info(ctx.grColorType(), kPremul_SkAlphaType, ctx.refColorSpace(), rect.size()); + + if (radius.fWidth > 0) { + auto dstFillContext = + rContext->priv().makeSFC(info, + "SpecialImage_ApplyMorphology_Width", + SkBackingFit::kApprox, + 1, + GrMipmapped::kNo, + proxy->isProtected(), + kBottomLeft_GrSurfaceOrigin); + if (!dstFillContext) { + return nullptr; + } + + apply_morphology_pass(dstFillContext.get(), std::move(srcView), srcAlphaType, + srcRect, dstRect, radius.fWidth, morphType, MorphDirection::kX); + SkIRect clearRect = SkIRect::MakeXYWH(dstRect.fLeft, dstRect.fBottom, + dstRect.width(), radius.fHeight); + SkPMColor4f clearColor = MorphType::kErode == morphType + ? SK_PMColor4fWHITE : SK_PMColor4fTRANSPARENT; + dstFillContext->clear(clearRect, clearColor); + + srcView = dstFillContext->readSurfaceView(); + srcAlphaType = dstFillContext->colorInfo().alphaType(); + srcRect = dstRect; + } + if (radius.fHeight > 0) { + auto dstFillContext = + rContext->priv().makeSFC(info, + "SpecialImage_ApplyMorphology_Height", + SkBackingFit::kApprox, + 1, + GrMipmapped::kNo, + srcView.proxy()->isProtected(), + kBottomLeft_GrSurfaceOrigin); + if (!dstFillContext) { + return nullptr; + } + + apply_morphology_pass(dstFillContext.get(), std::move(srcView), srcAlphaType, + srcRect, dstRect, radius.fHeight, morphType, MorphDirection::kY); + + srcView = dstFillContext->readSurfaceView(); + } + + return SkSpecialImage::MakeDeferredFromGpu(rContext, + SkIRect::MakeWH(rect.width(), rect.height()), + kNeedNewImageUniqueID_SpecialImage, + std::move(srcView), + info.colorInfo(), + input->props()); +} +#endif + +namespace { + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + template + static void morph(const SkPMColor* src, SkPMColor* dst, + int radius, int width, int height, int srcStride, int dstStride) { + const int srcStrideX = direction == MorphDirection::kX ? 1 : srcStride; + const int dstStrideX = direction == MorphDirection::kX ? 1 : dstStride; + const int srcStrideY = direction == MorphDirection::kX ? srcStride : 1; + const int dstStrideY = direction == MorphDirection::kX ? dstStride : 1; + radius = std::min(radius, width - 1); + const SkPMColor* upperSrc = src + radius * srcStrideX; + for (int x = 0; x < width; ++x) { + const SkPMColor* lp = src; + const SkPMColor* up = upperSrc; + SkPMColor* dptr = dst; + for (int y = 0; y < height; ++y) { + __m128i extreme = (type == MorphType::kDilate) ? _mm_setzero_si128() + : _mm_set1_epi32(0xFFFFFFFF); + for (const SkPMColor* p = lp; p <= up; p += srcStrideX) { + __m128i src_pixel = _mm_cvtsi32_si128(*p); + extreme = (type == MorphType::kDilate) ? _mm_max_epu8(src_pixel, extreme) + : _mm_min_epu8(src_pixel, extreme); + } + *dptr = _mm_cvtsi128_si32(extreme); + dptr += dstStrideY; + lp += srcStrideY; + up += srcStrideY; + } + if (x >= radius) { src += srcStrideX; } + if (x + radius < width - 1) { upperSrc += srcStrideX; } + dst += dstStrideX; + } + } + +#elif defined(SK_ARM_HAS_NEON) + template + static void morph(const SkPMColor* src, SkPMColor* dst, + int radius, int width, int height, int srcStride, int dstStride) { + const int srcStrideX = direction == MorphDirection::kX ? 1 : srcStride; + const int dstStrideX = direction == MorphDirection::kX ? 1 : dstStride; + const int srcStrideY = direction == MorphDirection::kX ? srcStride : 1; + const int dstStrideY = direction == MorphDirection::kX ? dstStride : 1; + radius = std::min(radius, width - 1); + const SkPMColor* upperSrc = src + radius * srcStrideX; + for (int x = 0; x < width; ++x) { + const SkPMColor* lp = src; + const SkPMColor* up = upperSrc; + SkPMColor* dptr = dst; + for (int y = 0; y < height; ++y) { + uint8x8_t extreme = vdup_n_u8(type == MorphType::kDilate ? 0 : 255); + for (const SkPMColor* p = lp; p <= up; p += srcStrideX) { + uint8x8_t src_pixel = vreinterpret_u8_u32(vdup_n_u32(*p)); + extreme = (type == MorphType::kDilate) ? vmax_u8(src_pixel, extreme) + : vmin_u8(src_pixel, extreme); + } + *dptr = vget_lane_u32(vreinterpret_u32_u8(extreme), 0); + dptr += dstStrideY; + lp += srcStrideY; + up += srcStrideY; + } + if (x >= radius) src += srcStrideX; + if (x + radius < width - 1) upperSrc += srcStrideX; + dst += dstStrideX; + } + } + +#else + template + static void morph(const SkPMColor* src, SkPMColor* dst, + int radius, int width, int height, int srcStride, int dstStride) { + const int srcStrideX = direction == MorphDirection::kX ? 1 : srcStride; + const int dstStrideX = direction == MorphDirection::kX ? 1 : dstStride; + const int srcStrideY = direction == MorphDirection::kX ? srcStride : 1; + const int dstStrideY = direction == MorphDirection::kX ? dstStride : 1; + radius = std::min(radius, width - 1); + const SkPMColor* upperSrc = src + radius * srcStrideX; + for (int x = 0; x < width; ++x) { + const SkPMColor* lp = src; + const SkPMColor* up = upperSrc; + SkPMColor* dptr = dst; + for (int y = 0; y < height; ++y) { + // If we're maxing (dilate), start from 0; if minning (erode), start from 255. + const int start = (type == MorphType::kDilate) ? 0 : 255; + int B = start, G = start, R = start, A = start; + for (const SkPMColor* p = lp; p <= up; p += srcStrideX) { + int b = SkGetPackedB32(*p), + g = SkGetPackedG32(*p), + r = SkGetPackedR32(*p), + a = SkGetPackedA32(*p); + if (type == MorphType::kDilate) { + B = std::max(b, B); + G = std::max(g, G); + R = std::max(r, R); + A = std::max(a, A); + } else { + B = std::min(b, B); + G = std::min(g, G); + R = std::min(r, R); + A = std::min(a, A); + } + } + *dptr = SkPackARGB32(A, R, G, B); + dptr += dstStrideY; + lp += srcStrideY; + up += srcStrideY; + } + if (x >= radius) { src += srcStrideX; } + if (x + radius < width - 1) { upperSrc += srcStrideX; } + dst += dstStrideX; + } + } +#endif +} // namespace + +sk_sp SkMorphologyImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + SkIRect bounds; + input = this->applyCropRectAndPad(this->mapContext(ctx), input.get(), &inputOffset, &bounds); + if (!input) { + return nullptr; + } + + SkSize radius = mappedRadius(ctx.ctm()); + int width = SkScalarRoundToInt(radius.width()); + int height = SkScalarRoundToInt(radius.height()); + + // Width (or height) must fit in a signed 32-bit int to avoid UBSAN issues (crbug.com/1018190) + // Further, we limit the radius to something much smaller, to avoid extremely slow draw calls: + // (crbug.com/1123035): + constexpr int kMaxRadius = 100; // (std::numeric_limits::max() - 1) / 2; + + if (width < 0 || height < 0 || width > kMaxRadius || height > kMaxRadius) { + return nullptr; + } + + SkIRect srcBounds = bounds; + srcBounds.offset(-inputOffset); + + if (0 == width && 0 == height) { + offset->fX = bounds.left(); + offset->fY = bounds.top(); + return input->makeSubset(srcBounds); + } + +#if defined(SK_GANESH) + if (ctx.gpuBacked()) { + auto context = ctx.getContext(); + + // Ensure the input is in the destination color space. Typically applyCropRect will have + // called pad_image to account for our dilation of bounds, so the result will already be + // moved to the destination color space. If a filter DAG avoids that, then we use this + // fall-back, which saves us from having to do the xform during the filter itself. + input = ImageToColorSpace(input.get(), ctx.colorType(), ctx.colorSpace(), + ctx.surfaceProps()); + + sk_sp result(apply_morphology(context, input.get(), srcBounds, fType, + SkISize::Make(width, height), ctx)); + if (result) { + offset->fX = bounds.left(); + offset->fY = bounds.top(); + } + return result; + } +#endif + + SkBitmap inputBM; + + if (!input->getROPixels(&inputBM)) { + return nullptr; + } + + if (inputBM.colorType() != kN32_SkColorType) { + return nullptr; + } + + SkImageInfo info = SkImageInfo::Make(bounds.size(), inputBM.colorType(), inputBM.alphaType()); + + SkBitmap dst; + if (!dst.tryAllocPixels(info)) { + return nullptr; + } + + SkMorphologyImageFilter::Proc procX, procY; + + if (MorphType::kDilate == fType) { + procX = &morph; + procY = &morph; + } else { + procX = &morph; + procY = &morph; + } + + if (width > 0 && height > 0) { + SkBitmap tmp; + if (!tmp.tryAllocPixels(info)) { + return nullptr; + } + + call_proc_X(procX, inputBM, &tmp, width, srcBounds); + SkIRect tmpBounds = SkIRect::MakeWH(srcBounds.width(), srcBounds.height()); + call_proc_Y(procY, + tmp.getAddr32(tmpBounds.left(), tmpBounds.top()), tmp.rowBytesAsPixels(), + &dst, height, tmpBounds); + } else if (width > 0) { + call_proc_X(procX, inputBM, &dst, width, srcBounds); + } else if (height > 0) { + call_proc_Y(procY, + inputBM.getAddr32(srcBounds.left(), srcBounds.top()), + inputBM.rowBytesAsPixels(), + &dst, height, srcBounds); + } + offset->fX = bounds.left(); + offset->fY = bounds.top(); + + return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()), + dst, ctx.surfaceProps()); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkPictureImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkPictureImageFilter.cpp new file mode 100644 index 0000000000..17fc66b1b9 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkPictureImageFilter.cpp @@ -0,0 +1,150 @@ +/* + * Copyright 2013 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPicture.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include + +namespace { + +class SkPictureImageFilter final : public SkImageFilter_Base { +public: + SkPictureImageFilter(sk_sp picture, const SkRect& cropRect) + : INHERITED(nullptr, 0, nullptr) + , fPicture(std::move(picture)) + , fCropRect(cropRect) {} + +protected: + /* Constructs an SkPictureImageFilter object from an SkReadBuffer. + * Note: If the SkPictureImageFilter object construction requires bitmap + * decoding, the decoder must be set on the SkReadBuffer parameter by calling + * SkReadBuffer::setBitmapDecoder() before calling this constructor. + * @param SkReadBuffer Serialized picture data. + */ + void flatten(SkWriteBuffer&) const override; + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + + SkRect computeFastBounds(const SkRect& src) const override; + SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + +private: + friend void ::SkRegisterPictureImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkPictureImageFilter) + + sk_sp fPicture; + SkRect fCropRect; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Picture(sk_sp pic, const SkRect& targetRect) { + return sk_sp(new SkPictureImageFilter(std::move(pic), targetRect)); +} + +void SkRegisterPictureImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkPictureImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkPictureImageFilterImpl", SkPictureImageFilter::CreateProc); +} + +sk_sp SkPictureImageFilter::CreateProc(SkReadBuffer& buffer) { + sk_sp picture; + SkRect cropRect; + + if (buffer.readBool()) { + picture = SkPicturePriv::MakeFromBuffer(buffer); + } + buffer.readRect(&cropRect); + + return SkImageFilters::Picture(std::move(picture), cropRect); +} + +void SkPictureImageFilter::flatten(SkWriteBuffer& buffer) const { + bool hasPicture = (fPicture != nullptr); + buffer.writeBool(hasPicture); + if (hasPicture) { + SkPicturePriv::Flatten(fPicture, buffer); + } + buffer.writeRect(fCropRect); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkPictureImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + if (!fPicture) { + return nullptr; + } + + SkRect floatBounds; + ctx.ctm().mapRect(&floatBounds, fCropRect); + SkIRect bounds = floatBounds.roundOut(); + if (!bounds.intersect(ctx.clipBounds())) { + return nullptr; + } + + SkASSERT(!bounds.isEmpty()); + + // Given the standard usage of the picture image filter (i.e., to render content at a fixed + // resolution that, most likely, differs from the screen's) disable LCD text by removing any + // knowledge of the pixel geometry. + SkSurfaceProps props = ctx.surfaceProps().cloneWithPixelGeometry(kUnknown_SkPixelGeometry); + sk_sp surf(ctx.makeSurface(bounds.size(), &props)); + if (!surf) { + return nullptr; + } + + SkASSERT(kUnknown_SkPixelGeometry == surf->props().pixelGeometry()); + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + canvas->clear(0x0); + + canvas->translate(-SkIntToScalar(bounds.fLeft), -SkIntToScalar(bounds.fTop)); + canvas->concat(ctx.ctm()); + canvas->drawPicture(fPicture); + + offset->fX = bounds.fLeft; + offset->fY = bounds.fTop; + return surf->makeImageSnapshot(); +} + +SkRect SkPictureImageFilter::computeFastBounds(const SkRect& src) const { + return fCropRect; +} + +SkIRect SkPictureImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection direction, + const SkIRect* inputRect) const { + if (kReverse_MapDirection == direction) { + return INHERITED::onFilterNodeBounds(src, ctm, direction, inputRect); + } + + SkRect dstRect = fCropRect; + ctm.mapRect(&dstRect); + return dstRect.roundOut(); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkRuntimeImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkRuntimeImageFilter.cpp new file mode 100644 index 0000000000..2f113cda3b --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkRuntimeImageFilter.cpp @@ -0,0 +1,284 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/effects/imagefilters/SkRuntimeImageFilter.h" + +#ifdef SK_ENABLE_SKSL + +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkData.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkShader.h" +#include "include/core/SkSpan.h" +#include "include/core/SkString.h" +#include "include/effects/SkImageFilters.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkSpinlock.h" +#include "include/private/base/SkTArray.h" +#include "src/core/SkImageFilterTypes.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include +#include +#include +#include + +class SkRuntimeImageFilter final : public SkImageFilter_Base { +public: + SkRuntimeImageFilter(sk_sp effect, + sk_sp uniforms, + sk_sp input) + : INHERITED(&input, 1, /*cropRect=*/nullptr) + , fShaderBuilder(std::move(effect), std::move(uniforms)) { + std::string_view childName = fShaderBuilder.effect()->children().front().name; + fChildShaderNames.push_back(SkString(childName)); + } + SkRuntimeImageFilter(const SkRuntimeShaderBuilder& builder, + std::string_view childShaderNames[], + const sk_sp inputs[], + int inputCount) + : INHERITED(inputs, inputCount, /*cropRect=*/nullptr) + , fShaderBuilder(builder) { + fChildShaderNames.reserve_back(inputCount); + for (int i = 0; i < inputCount; i++) { + fChildShaderNames.push_back(SkString(childShaderNames[i])); + } + } + + bool onAffectsTransparentBlack() const override { return true; } + MatrixCapability onGetCTMCapability() const override { return MatrixCapability::kTranslate; } + +protected: + void flatten(SkWriteBuffer&) const override; + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + +private: + friend void ::SkRegisterRuntimeImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkRuntimeImageFilter) + + mutable SkSpinlock fShaderBuilderLock; + mutable SkRuntimeShaderBuilder fShaderBuilder; + SkSTArray<1, SkString> fChildShaderNames; + + using INHERITED = SkImageFilter_Base; +}; + +sk_sp SkMakeRuntimeImageFilter(sk_sp effect, + sk_sp uniforms, + sk_sp input) { + // Rather than replicate all of the checks from makeShader here, just try to create a shader + // once, to determine if everything is valid. + sk_sp child = nullptr; + auto shader = effect->makeShader(uniforms, &child, 1); + if (!shader) { + // Could be wrong signature, wrong uniform block size, wrong number/type of children, etc... + return nullptr; + } + + return sk_sp( + new SkRuntimeImageFilter(std::move(effect), std::move(uniforms), std::move(input))); +} + +void SkRegisterRuntimeImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkRuntimeImageFilter); +} + +sk_sp SkRuntimeImageFilter::CreateProc(SkReadBuffer& buffer) { + // We don't know how many inputs to expect yet. Passing -1 allows any number of children. + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, -1); + if (common.cropRect()) { + return nullptr; + } + + // Read the SkSL string and convert it into a runtime effect + SkString sksl; + buffer.readString(&sksl); + auto effect = SkMakeCachedRuntimeEffect(SkRuntimeEffect::MakeForShader, std::move(sksl)); + if (!buffer.validate(effect != nullptr)) { + return nullptr; + } + + // Read the uniform data and make sure it matches the size from the runtime effect + sk_sp uniforms = buffer.readByteArrayAsData(); + if (!buffer.validate(uniforms->size() == effect->uniformSize())) { + return nullptr; + } + + // Read the child shader names + SkSTArray<4, std::string_view> childShaderNames; + SkSTArray<4, SkString> childShaderNameStrings; + childShaderNames.resize(common.inputCount()); + childShaderNameStrings.resize(common.inputCount()); + for (int i = 0; i < common.inputCount(); i++) { + buffer.readString(&childShaderNameStrings[i]); + childShaderNames[i] = childShaderNameStrings[i].c_str(); + } + + SkRuntimeShaderBuilder builder(std::move(effect), std::move(uniforms)); + + // Populate the builder with the corresponding children + for (const SkRuntimeEffect::Child& child : builder.effect()->children()) { + std::string_view name = child.name; + switch (child.type) { + case SkRuntimeEffect::ChildType::kBlender: { + builder.child(name) = buffer.readBlender(); + break; + } + case SkRuntimeEffect::ChildType::kColorFilter: { + builder.child(name) = buffer.readColorFilter(); + break; + } + case SkRuntimeEffect::ChildType::kShader: { + builder.child(name) = buffer.readShader(); + break; + } + } + } + + if (!buffer.isValid()) { + return nullptr; + } + + return SkImageFilters::RuntimeShader(builder, childShaderNames.data(), + common.inputs(), common.inputCount()); +} + +void SkRuntimeImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + fShaderBuilderLock.acquire(); + buffer.writeString(fShaderBuilder.effect()->source().c_str()); + buffer.writeDataAsByteArray(fShaderBuilder.uniforms().get()); + for (const SkString& name : fChildShaderNames) { + buffer.writeString(name.c_str()); + } + for (size_t x = 0; x < fShaderBuilder.children().size(); x++) { + buffer.writeFlattenable(fShaderBuilder.children()[x].flattenable()); + } + fShaderBuilderLock.release(); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkRuntimeImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIRect outputBounds = SkIRect(ctx.desiredOutput()); + sk_sp surf(ctx.makeSurface(outputBounds.size())); + if (!surf) { + return nullptr; + } + + SkMatrix ctm = ctx.ctm(); + SkMatrix inverse; + SkAssertResult(ctm.invert(&inverse)); + + const int inputCount = this->countInputs(); + SkASSERT(inputCount == fChildShaderNames.size()); + + SkSTArray<1, sk_sp> inputShaders; + for (int i = 0; i < inputCount; i++) { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(i, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + SkMatrix localM = inverse * SkMatrix::Translate(inputOffset); + sk_sp inputShader = + input->asShader(SkSamplingOptions(SkFilterMode::kLinear), localM); + SkASSERT(inputShader); + inputShaders.push_back(std::move(inputShader)); + } + + // lock the mutation of the builder and creation of the shader so that the builder's state is + // const and is safe for multi-threaded access. + fShaderBuilderLock.acquire(); + for (int i = 0; i < inputCount; i++) { + fShaderBuilder.child(fChildShaderNames[i].c_str()) = inputShaders[i]; + } + sk_sp shader = fShaderBuilder.makeShader(); + // Remove the inputs from the builder to avoid unnecessarily prolonging the shader's lifetime + for (int i = 0; i < inputCount; i++) { + fShaderBuilder.child(fChildShaderNames[i].c_str()) = nullptr; + } + fShaderBuilderLock.release(); + + SkASSERT(shader.get()); + + SkPaint paint; + paint.setShader(std::move(shader)); + paint.setBlendMode(SkBlendMode::kSrc); + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + // Translate from layer space into surf's image space + canvas->translate(-outputBounds.fLeft, -outputBounds.fTop); + // Ensure shader parameters are relative to parameter space, not layer space + canvas->concat(ctx.ctm()); + + canvas->drawPaint(paint); + + *offset = outputBounds.topLeft(); + return surf->makeImageSnapshot(); +} + +static bool child_is_shader(const SkRuntimeEffect::Child* child) { + return child && child->type == SkRuntimeEffect::ChildType::kShader; +} + +sk_sp SkImageFilters::RuntimeShader(const SkRuntimeShaderBuilder& builder, + std::string_view childShaderName, + sk_sp input) { + // If no childShaderName is provided, check to see if we can implicitly assign it to the only + // child in the effect. + if (childShaderName.empty()) { + auto children = builder.effect()->children(); + if (children.size() != 1) { + return nullptr; + } + childShaderName = children.front().name; + } + + return SkImageFilters::RuntimeShader(builder, &childShaderName, &input, 1); +} + +sk_sp SkImageFilters::RuntimeShader(const SkRuntimeShaderBuilder& builder, + std::string_view childShaderNames[], + const sk_sp inputs[], + int inputCount) { + for (int i = 0; i < inputCount; i++) { + std::string_view name = childShaderNames[i]; + // All names must be non-empty, and present as a child shader in the effect: + if (name.empty() || !child_is_shader(builder.effect()->findChild(name))) { + return nullptr; + } + + // We don't allow duplicates, either: + for (int j = 0; j < i; j++) { + if (name == childShaderNames[j]) { + return nullptr; + } + } + } + + return sk_sp(new SkRuntimeImageFilter(builder, childShaderNames, + inputs, inputCount)); +} + +#endif // SK_ENABLE_SKSL diff --git a/gfx/skia/skia/src/effects/imagefilters/SkRuntimeImageFilter.h b/gfx/skia/skia/src/effects/imagefilters/SkRuntimeImageFilter.h new file mode 100644 index 0000000000..e66a61c44b --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkRuntimeImageFilter.h @@ -0,0 +1,22 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRuntimeImageFilter_DEFINED +#define SkRuntimeImageFilter_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" + +class SkData; +class SkImageFilter; +class SkRuntimeEffect; + +SK_API sk_sp SkMakeRuntimeImageFilter(sk_sp effect, + sk_sp uniforms, + sk_sp input); + +#endif diff --git a/gfx/skia/skia/src/effects/imagefilters/SkShaderImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkShaderImageFilter.cpp new file mode 100644 index 0000000000..a32eca4d46 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkShaderImageFilter.cpp @@ -0,0 +1,135 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkShader.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkWriteBuffer.h" + +#include + +namespace { + +class SkShaderImageFilter final : public SkImageFilter_Base { +public: + SkShaderImageFilter(sk_sp shader, SkImageFilters::Dither dither, const SkRect* rect) + : INHERITED(nullptr, 0, rect) + , fShader(std::move(shader)) + , fDither(dither) {} + +protected: + void flatten(SkWriteBuffer&) const override; + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + +private: + friend void ::SkRegisterShaderImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkShaderImageFilter) + + bool onAffectsTransparentBlack() const override { return true; } + + sk_sp fShader; + SkImageFilters::Dither fDither; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + +sk_sp SkImageFilters::Shader(sk_sp shader, + Dither dither, + const CropRect& cropRect) { + return sk_sp(new SkShaderImageFilter(std::move(shader), dither, cropRect)); +} + +void SkRegisterShaderImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkShaderImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkPaintImageFilter", SkShaderImageFilter::CreateProc); + SkFlattenable::Register("SkPaintImageFilterImpl", SkShaderImageFilter::CreateProc); +} + +sk_sp SkShaderImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0); + sk_sp shader; + bool dither; + if (buffer.isVersionLT(SkPicturePriv::kShaderImageFilterSerializeShader)) { + // The old implementation stored an entire SkPaint, but we only need the SkShader and dither + // boolean. We could fail if the paint stores more effects than that, but this is simpler. + SkPaint paint = buffer.readPaint(); + shader = paint.getShader() ? paint.refShader() + : SkShaders::Color(paint.getColor4f(), nullptr); + dither = paint.isDither(); + } else { + shader = buffer.readShader(); + dither = buffer.readBool(); + } + return SkImageFilters::Shader(std::move(shader), + SkImageFilters::Dither(dither), + common.cropRect()); +} + +void SkShaderImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeFlattenable(fShader.get()); + buffer.writeBool(fDither == SkImageFilters::Dither::kYes); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkShaderImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIRect bounds; + const SkIRect srcBounds = SkIRect::MakeWH(ctx.sourceImage()->width(), + ctx.sourceImage()->height()); + if (!this->applyCropRect(ctx, srcBounds, &bounds)) { + return nullptr; + } + + sk_sp surf(ctx.makeSurface(bounds.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + canvas->clear(0x0); + + SkMatrix matrix(ctx.ctm()); + matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); + SkRect rect = SkRect::MakeIWH(bounds.width(), bounds.height()); + SkMatrix inverse; + if (matrix.invert(&inverse)) { + inverse.mapRect(&rect); + } + canvas->setMatrix(matrix); + if (rect.isFinite()) { + SkPaint paint; + paint.setShader(fShader); + paint.setDither(fDither == SkImageFilters::Dither::kYes); + canvas->drawRect(rect, paint); + } + + offset->fX = bounds.fLeft; + offset->fY = bounds.fTop; + return surf->makeImageSnapshot(); +} diff --git a/gfx/skia/skia/src/effects/imagefilters/SkTileImageFilter.cpp b/gfx/skia/skia/src/effects/imagefilters/SkTileImageFilter.cpp new file mode 100644 index 0000000000..0a1d49ddf4 --- /dev/null +++ b/gfx/skia/skia/src/effects/imagefilters/SkTileImageFilter.cpp @@ -0,0 +1,198 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageFilter.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTileMode.h" +#include "include/core/SkTypes.h" +#include "include/effects/SkImageFilters.h" +#include "src/core/SkImageFilterTypes.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkSpecialImage.h" +#include "src/core/SkSpecialSurface.h" +#include "src/core/SkValidationUtils.h" +#include "src/core/SkWriteBuffer.h" + +#include + +namespace { + +class SkTileImageFilter final : public SkImageFilter_Base { +public: + SkTileImageFilter(const SkRect& srcRect, const SkRect& dstRect, sk_sp input) + : INHERITED(&input, 1, nullptr) + , fSrcRect(srcRect) + , fDstRect(dstRect) {} + + SkIRect onFilterBounds(const SkIRect& src, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + SkIRect onFilterNodeBounds(const SkIRect&, const SkMatrix& ctm, + MapDirection, const SkIRect* inputRect) const override; + SkRect computeFastBounds(const SkRect& src) const override; + +protected: + void flatten(SkWriteBuffer& buffer) const override; + + sk_sp onFilterImage(const Context&, SkIPoint* offset) const override; + +private: + friend void ::SkRegisterTileImageFilterFlattenable(); + SK_FLATTENABLE_HOOKS(SkTileImageFilter) + + SkRect fSrcRect; + SkRect fDstRect; + + using INHERITED = SkImageFilter_Base; +}; + +} // end namespace + + +sk_sp SkImageFilters::Tile(const SkRect& src, + const SkRect& dst, + sk_sp input) { + if (!SkIsValidRect(src) || !SkIsValidRect(dst)) { + return nullptr; + } + if (src.width() == dst.width() && src.height() == dst.height()) { + SkRect ir = dst; + if (!ir.intersect(src)) { + return input; + } + return SkImageFilters::Offset(dst.x() - src.x(), dst.y() - src.y(), + std::move(input), &ir); + } + return sk_sp(new SkTileImageFilter(src, dst, std::move(input))); +} + +void SkRegisterTileImageFilterFlattenable() { + SK_REGISTER_FLATTENABLE(SkTileImageFilter); + // TODO (michaelludwig) - Remove after grace period for SKPs to stop using old name + SkFlattenable::Register("SkTileImageFilterImpl", SkTileImageFilter::CreateProc); +} + +sk_sp SkTileImageFilter::CreateProc(SkReadBuffer& buffer) { + SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); + SkRect src, dst; + buffer.readRect(&src); + buffer.readRect(&dst); + return SkImageFilters::Tile(src, dst, common.getInput(0)); +} + +void SkTileImageFilter::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writeRect(fSrcRect); + buffer.writeRect(fDstRect); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkTileImageFilter::onFilterImage(const Context& ctx, + SkIPoint* offset) const { + SkIPoint inputOffset = SkIPoint::Make(0, 0); + sk_sp input(this->filterInput(0, ctx, &inputOffset)); + if (!input) { + return nullptr; + } + + SkRect dstRect; + ctx.ctm().mapRect(&dstRect, fDstRect); + if (!dstRect.intersect(SkRect::Make(ctx.clipBounds()))) { + return nullptr; + } + + const SkIRect dstIRect = skif::RoundOut(dstRect); + if (!fSrcRect.width() || !fSrcRect.height() || !dstIRect.width() || !dstIRect.height()) { + return nullptr; + } + + SkRect srcRect; + ctx.ctm().mapRect(&srcRect, fSrcRect); + SkIRect srcIRect = skif::RoundOut(srcRect); + srcIRect.offset(-inputOffset); + const SkIRect inputBounds = SkIRect::MakeWH(input->width(), input->height()); + + if (!SkIRect::Intersects(srcIRect, inputBounds)) { + return nullptr; + } + + // We create an SkImage here b.c. it needs to be a tight fit for the tiling + sk_sp subset; + if (inputBounds.contains(srcIRect)) { + subset = input->asImage(&srcIRect); + } else { + sk_sp surf(input->makeTightSurface(ctx.colorType(), ctx.colorSpace(), + srcIRect.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + SkPaint paint; + paint.setBlendMode(SkBlendMode::kSrc); + + input->draw(canvas, + SkIntToScalar(inputOffset.x()), SkIntToScalar(inputOffset.y()), + SkSamplingOptions(), &paint); + + subset = surf->makeImageSnapshot(); + } + if (!subset) { + return nullptr; + } + SkASSERT(subset->width() == srcIRect.width()); + SkASSERT(subset->height() == srcIRect.height()); + + sk_sp surf(ctx.makeSurface(dstIRect.size())); + if (!surf) { + return nullptr; + } + + SkCanvas* canvas = surf->getCanvas(); + SkASSERT(canvas); + + SkPaint paint; + paint.setBlendMode(SkBlendMode::kSrc); + paint.setShader(subset->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, + SkSamplingOptions())); + canvas->translate(-dstRect.fLeft, -dstRect.fTop); + canvas->drawRect(dstRect, paint); + offset->fX = dstIRect.fLeft; + offset->fY = dstIRect.fTop; + return surf->makeImageSnapshot(); +} + +SkIRect SkTileImageFilter::onFilterNodeBounds( + const SkIRect& src, const SkMatrix& ctm, MapDirection dir, const SkIRect* inputRect) const { + SkRect rect = kReverse_MapDirection == dir ? fSrcRect : fDstRect; + ctm.mapRect(&rect); + return rect.roundOut(); +} + +SkIRect SkTileImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix&, + MapDirection, const SkIRect* inputRect) const { + // Don't recurse into inputs. + return src; +} + +SkRect SkTileImageFilter::computeFastBounds(const SkRect& src) const { + return fDstRect; +} diff --git a/gfx/skia/skia/src/encode/SkEncoder.cpp b/gfx/skia/skia/src/encode/SkEncoder.cpp new file mode 100644 index 0000000000..a2d6f05b46 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkEncoder.cpp @@ -0,0 +1,29 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/encode/SkEncoder.h" + +#include "include/private/base/SkAssert.h" + +bool SkEncoder::encodeRows(int numRows) { + SkASSERT(numRows > 0 && fCurrRow < fSrc.height()); + if (numRows <= 0 || fCurrRow >= fSrc.height()) { + return false; + } + + if (fCurrRow + numRows > fSrc.height()) { + numRows = fSrc.height() - fCurrRow; + } + + if (!this->onEncodeRows(numRows)) { + // If we fail, short circuit any future calls. + fCurrRow = fSrc.height(); + return false; + } + + return true; +} diff --git a/gfx/skia/skia/src/encode/SkICC.cpp b/gfx/skia/skia/src/encode/SkICC.cpp new file mode 100644 index 0000000000..7163563d61 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkICC.cpp @@ -0,0 +1,762 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/encode/SkICC.h" + +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkFloatingPoint.h" +#include "modules/skcms/skcms.h" +#include "src/base/SkAutoMalloc.h" +#include "src/base/SkEndian.h" +#include "src/base/SkUtils.h" +#include "src/core/SkMD5.h" +#include "src/encode/SkICCPriv.h" + +#include +#include +#include +#include +#include + +// The number of input and output channels. +static constexpr size_t kNumChannels = 3; + +// The D50 illuminant. +constexpr float kD50_x = 0.9642f; +constexpr float kD50_y = 1.0000f; +constexpr float kD50_z = 0.8249f; + +// This is like SkFloatToFixed, but rounds to nearest, preserving as much accuracy as possible +// when going float -> fixed -> float (it has the same accuracy when going fixed -> float -> fixed). +// The use of double is necessary to accommodate the full potential 32-bit mantissa of the 16.16 +// SkFixed value, and so avoiding rounding problems with float. Also, see the comment in SkFixed.h. +static SkFixed float_round_to_fixed(float x) { + return sk_float_saturate2int((float)floor((double)x * SK_Fixed1 + 0.5)); +} + +static uint16_t float_round_to_unorm16(float x) { + x = x * 65535.f + 0.5; + if (x > 65535) return 65535; + if (x < 0) return 0; + return static_cast(x); +} + +struct ICCHeader { + // Size of the profile (computed) + uint32_t size; + + // Preferred CMM type (ignored) + uint32_t cmm_type = 0; + + // Version 4.3 or 4.4 if CICP is included. + uint32_t version = SkEndian_SwapBE32(0x04300000); + + // Display device profile + uint32_t profile_class = SkEndian_SwapBE32(kDisplay_Profile); + + // RGB input color space; + uint32_t data_color_space = SkEndian_SwapBE32(kRGB_ColorSpace); + + // Profile connection space. + uint32_t pcs = SkEndian_SwapBE32(kXYZ_PCSSpace); + + // Date and time (ignored) + uint16_t creation_date_year = SkEndian_SwapBE16(2016); + uint16_t creation_date_month = SkEndian_SwapBE16(1); // 1-12 + uint16_t creation_date_day = SkEndian_SwapBE16(1); // 1-31 + uint16_t creation_date_hours = 0; // 0-23 + uint16_t creation_date_minutes = 0; // 0-59 + uint16_t creation_date_seconds = 0; // 0-59 + + // Profile signature + uint32_t signature = SkEndian_SwapBE32(kACSP_Signature); + + // Platform target (ignored) + uint32_t platform = 0; + + // Flags: not embedded, can be used independently + uint32_t flags = 0x00000000; + + // Device manufacturer (ignored) + uint32_t device_manufacturer = 0; + + // Device model (ignored) + uint32_t device_model = 0; + + // Device attributes (ignored) + uint8_t device_attributes[8] = {0}; + + // Relative colorimetric rendering intent + uint32_t rendering_intent = SkEndian_SwapBE32(1); + + // D50 standard illuminant (X, Y, Z) + uint32_t illuminant_X = SkEndian_SwapBE32(float_round_to_fixed(kD50_x)); + uint32_t illuminant_Y = SkEndian_SwapBE32(float_round_to_fixed(kD50_y)); + uint32_t illuminant_Z = SkEndian_SwapBE32(float_round_to_fixed(kD50_z)); + + // Profile creator (ignored) + uint32_t creator = 0; + + // Profile id checksum (ignored) + uint8_t profile_id[16] = {0}; + + // Reserved (ignored) + uint8_t reserved[28] = {0}; + + // Technically not part of header, but required + uint32_t tag_count = 0; +}; + +static sk_sp write_xyz_tag(float x, float y, float z) { + uint32_t data[] = { + SkEndian_SwapBE32(kXYZ_PCSSpace), + 0, + SkEndian_SwapBE32(float_round_to_fixed(x)), + SkEndian_SwapBE32(float_round_to_fixed(y)), + SkEndian_SwapBE32(float_round_to_fixed(z)), + }; + return SkData::MakeWithCopy(data, sizeof(data)); +} + +static bool nearly_equal(float x, float y) { + // A note on why I chose this tolerance: transfer_fn_almost_equal() uses a + // tolerance of 0.001f, which doesn't seem to be enough to distinguish + // between similar transfer functions, for example: gamma2.2 and sRGB. + // + // If the tolerance is 0.0f, then this we can't distinguish between two + // different encodings of what is clearly the same colorspace. Some + // experimentation with example files lead to this number: + static constexpr float kTolerance = 1.0f / (1 << 11); + return ::fabsf(x - y) <= kTolerance; +} + +static bool nearly_equal(const skcms_TransferFunction& u, + const skcms_TransferFunction& v) { + return nearly_equal(u.g, v.g) + && nearly_equal(u.a, v.a) + && nearly_equal(u.b, v.b) + && nearly_equal(u.c, v.c) + && nearly_equal(u.d, v.d) + && nearly_equal(u.e, v.e) + && nearly_equal(u.f, v.f); +} + +static bool nearly_equal(const skcms_Matrix3x3& u, const skcms_Matrix3x3& v) { + for (int r = 0; r < 3; r++) { + for (int c = 0; c < 3; c++) { + if (!nearly_equal(u.vals[r][c], v.vals[r][c])) { + return false; + } + } + } + return true; +} + +static constexpr uint32_t kCICPPrimariesSRGB = 1; +static constexpr uint32_t kCICPPrimariesP3 = 12; +static constexpr uint32_t kCICPPrimariesRec2020 = 9; + +static uint32_t get_cicp_primaries(const skcms_Matrix3x3& toXYZD50) { + if (nearly_equal(toXYZD50, SkNamedGamut::kSRGB)) { + return kCICPPrimariesSRGB; + } else if (nearly_equal(toXYZD50, SkNamedGamut::kDisplayP3)) { + return kCICPPrimariesP3; + } else if (nearly_equal(toXYZD50, SkNamedGamut::kRec2020)) { + return kCICPPrimariesRec2020; + } + return 0; +} + +static constexpr uint32_t kCICPTrfnSRGB = 1; +static constexpr uint32_t kCICPTrfn2Dot2 = 4; +static constexpr uint32_t kCICPTrfnLinear = 8; +static constexpr uint32_t kCICPTrfnPQ = 16; +static constexpr uint32_t kCICPTrfnHLG = 18; + +static uint32_t get_cicp_trfn(const skcms_TransferFunction& fn) { + switch (skcms_TransferFunction_getType(&fn)) { + case skcms_TFType_Invalid: + return 0; + case skcms_TFType_sRGBish: + if (nearly_equal(fn, SkNamedTransferFn::kSRGB)) { + return kCICPTrfnSRGB; + } else if (nearly_equal(fn, SkNamedTransferFn::k2Dot2)) { + return kCICPTrfn2Dot2; + } else if (nearly_equal(fn, SkNamedTransferFn::kLinear)) { + return kCICPTrfnLinear; + } + break; + case skcms_TFType_PQish: + // All PQ transfer functions are mapped to the single PQ value, + // ignoring their SDR white level. + return kCICPTrfnPQ; + case skcms_TFType_HLGish: + // All HLG transfer functions are mapped to the single HLG value. + return kCICPTrfnHLG; + case skcms_TFType_HLGinvish: + return 0; + } + return 0; +} + +static std::string get_desc_string(const skcms_TransferFunction& fn, + const skcms_Matrix3x3& toXYZD50) { + const uint32_t cicp_trfn = get_cicp_trfn(fn); + const uint32_t cicp_primaries = get_cicp_primaries(toXYZD50); + + // Use a unique string for sRGB. + if (cicp_trfn == kCICPPrimariesSRGB && cicp_primaries == kCICPTrfnSRGB) { + return "sRGB"; + } + + // If available, use the named CICP primaries and transfer function. + if (cicp_primaries && cicp_trfn) { + std::string result; + switch (cicp_primaries) { + case kCICPPrimariesSRGB: + result += "sRGB"; + break; + case kCICPPrimariesP3: + result += "Display P3"; + break; + case kCICPPrimariesRec2020: + result += "Rec2020"; + break; + default: + result += "Unknown"; + break; + } + result += " Gamut with "; + switch (cicp_trfn) { + case kCICPTrfnSRGB: + result += "sRGB"; + break; + case kCICPTrfnLinear: + result += "Linear"; + break; + case kCICPTrfn2Dot2: + result += "2.2"; + break; + case kCICPTrfnPQ: + result += "PQ"; + break; + case kCICPTrfnHLG: + result += "HLG"; + break; + default: + result += "Unknown"; + break; + } + result += " Transfer"; + return result; + } + + // Fall back to a prefix plus md5 hash. + SkMD5 md5; + md5.write(&toXYZD50, sizeof(toXYZD50)); + md5.write(&fn, sizeof(fn)); + SkMD5::Digest digest = md5.finish(); + std::string md5_hexstring(2 * sizeof(SkMD5::Digest), ' '); + for (unsigned i = 0; i < sizeof(SkMD5::Digest); ++i) { + uint8_t byte = digest.data[i]; + md5_hexstring[2 * i + 0] = SkHexadecimalDigits::gUpper[byte >> 4]; + md5_hexstring[2 * i + 1] = SkHexadecimalDigits::gUpper[byte & 0xF]; + } + return "Google/Skia/" + md5_hexstring; +} + +static sk_sp write_text_tag(const char* text) { + uint32_t text_length = strlen(text); + uint32_t header[] = { + SkEndian_SwapBE32(kTAG_TextType), // Type signature + 0, // Reserved + SkEndian_SwapBE32(1), // Number of records + SkEndian_SwapBE32(12), // Record size (must be 12) + SkEndian_SwapBE32(SkSetFourByteTag('e', 'n', 'U', 'S')), // English USA + SkEndian_SwapBE32(2 * text_length), // Length of string in bytes + SkEndian_SwapBE32(28), // Offset of string + }; + SkDynamicMemoryWStream s; + s.write(header, sizeof(header)); + for (size_t i = 0; i < text_length; i++) { + // Convert ASCII to big-endian UTF-16. + s.write8(0); + s.write8(text[i]); + } + s.padToAlign4(); + return s.detachAsData(); +} + +// Write a CICP tag. +static sk_sp write_cicp_tag(const skcms_CICP& cicp) { + SkDynamicMemoryWStream s; + s.write32(SkEndian_SwapBE32(kTAG_cicp)); // Type signature + s.write32(0); // Reserved + s.write8(cicp.color_primaries); // Color primaries + s.write8(cicp.transfer_characteristics); // Transfer characteristics + s.write8(cicp.matrix_coefficients); // RGB matrix + s.write8(cicp.video_full_range_flag); // Full range + return s.detachAsData(); +} + +// Perform a matrix-vector multiplication. Overwrite the input vector with the result. +static void skcms_Matrix3x3_apply(const skcms_Matrix3x3* m, float* x) { + float y0 = x[0] * m->vals[0][0] + x[1] * m->vals[0][1] + x[2] * m->vals[0][2]; + float y1 = x[0] * m->vals[1][0] + x[1] * m->vals[1][1] + x[2] * m->vals[1][2]; + float y2 = x[0] * m->vals[2][0] + x[1] * m->vals[2][1] + x[2] * m->vals[2][2]; + x[0] = y0; + x[1] = y1; + x[2] = y2; +} + +void SkICCFloatXYZD50ToGrid16Lab(const float* xyz_float, uint8_t* grid16_lab) { + float v[3] = { + xyz_float[0] / kD50_x, + xyz_float[1] / kD50_y, + xyz_float[2] / kD50_z, + }; + for (size_t i = 0; i < 3; ++i) { + v[i] = v[i] > 0.008856f ? cbrtf(v[i]) : v[i] * 7.787f + (16 / 116.0f); + } + const float L = v[1] * 116.0f - 16.0f; + const float a = (v[0] - v[1]) * 500.0f; + const float b = (v[1] - v[2]) * 200.0f; + const float Lab_unorm[3] = { + L * (1 / 100.f), + (a + 128.0f) * (1 / 255.0f), + (b + 128.0f) * (1 / 255.0f), + }; + // This will encode L=1 as 0xFFFF. This matches how skcms will interpret the + // table, but the spec appears to indicate that the value should be 0xFF00. + // https://crbug.com/skia/13807 + for (size_t i = 0; i < 3; ++i) { + reinterpret_cast(grid16_lab)[i] = + SkEndian_SwapBE16(float_round_to_unorm16(Lab_unorm[i])); + } +} + +void SkICCFloatToTable16(const float f, uint8_t* table_16) { + *reinterpret_cast(table_16) = SkEndian_SwapBE16(float_round_to_unorm16(f)); +} + +// Compute the tone mapping gain for luminance value L. The gain should be +// applied after the transfer function is applied. +float compute_tone_map_gain(const skcms_TransferFunction& fn, float L) { + if (L <= 0.f) { + return 1.f; + } + if (skcms_TransferFunction_isPQish(&fn)) { + // The PQ transfer function will map to the range [0, 1]. Linearly scale + // it up to the range [0, 10,000/203]. We will then tone map that back + // down to [0, 1]. + constexpr float kInputMaxLuminance = 10000 / 203.f; + constexpr float kOutputMaxLuminance = 1.0; + L *= kInputMaxLuminance; + + // Compute the tone map gain which will tone map from 10,000/203 to 1.0. + constexpr float kToneMapA = kOutputMaxLuminance / (kInputMaxLuminance * kInputMaxLuminance); + constexpr float kToneMapB = 1.f / kOutputMaxLuminance; + return kInputMaxLuminance * (1.f + kToneMapA * L) / (1.f + kToneMapB * L); + } + if (skcms_TransferFunction_isHLGish(&fn)) { + // Let Lw be the brightness of the display in nits. + constexpr float Lw = 203.f; + const float gamma = 1.2f + 0.42f * std::log(Lw / 1000.f) / std::log(10.f); + return std::pow(L, gamma - 1.f); + } + return 1.f; +} + +// Write a lookup table based curve, potentially including tone mapping. +static sk_sp write_trc_tag(const skcms_Curve& trc) { + SkDynamicMemoryWStream s; + if (trc.table_entries) { + s.write32(SkEndian_SwapBE32(kTAG_CurveType)); // Type + s.write32(0); // Reserved + s.write32(SkEndian_SwapBE32(trc.table_entries)); // Value count + for (uint32_t i = 0; i < trc.table_entries; ++i) { + uint16_t value = reinterpret_cast(trc.table_16)[i]; + s.write16(value); + } + } else { + s.write32(SkEndian_SwapBE32(kTAG_ParaCurveType)); // Type + s.write32(0); // Reserved + const auto& fn = trc.parametric; + SkASSERT(skcms_TransferFunction_isSRGBish(&fn)); + if (fn.a == 1.f && fn.b == 0.f && fn.c == 0.f && fn.d == 0.f && fn.e == 0.f && + fn.f == 0.f) { + s.write32(SkEndian_SwapBE16(kExponential_ParaCurveType)); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.g))); + } else { + s.write32(SkEndian_SwapBE16(kGABCDEF_ParaCurveType)); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.g))); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.a))); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.b))); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.c))); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.d))); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.e))); + s.write32(SkEndian_SwapBE32(float_round_to_fixed(fn.f))); + } + } + s.padToAlign4(); + return s.detachAsData(); +} + +void compute_lut_entry(const skcms_Matrix3x3& src_to_XYZD50, float rgb[3]) { + // Compute the matrices to convert from source to Rec2020, and from Rec2020 to XYZD50. + skcms_Matrix3x3 src_to_rec2020; + const skcms_Matrix3x3 rec2020_to_XYZD50 = SkNamedGamut::kRec2020; + { + skcms_Matrix3x3 XYZD50_to_rec2020; + skcms_Matrix3x3_invert(&rec2020_to_XYZD50, &XYZD50_to_rec2020); + src_to_rec2020 = skcms_Matrix3x3_concat(&XYZD50_to_rec2020, &src_to_XYZD50); + } + + // Convert the source signal to linear. + for (size_t i = 0; i < kNumChannels; ++i) { + rgb[i] = skcms_TransferFunction_eval(&SkNamedTransferFn::kPQ, rgb[i]); + } + + // Convert source gamut to Rec2020. + skcms_Matrix3x3_apply(&src_to_rec2020, rgb); + + // Compute the luminance of the signal. + constexpr float kLr = 0.2627f; + constexpr float kLg = 0.6780f; + constexpr float kLb = 0.0593f; + float L = rgb[0] * kLr + rgb[1] * kLg + rgb[2] * kLb; + + // Compute the tone map gain based on the luminance. + float tone_map_gain = compute_tone_map_gain(SkNamedTransferFn::kPQ, L); + + // Apply the tone map gain. + for (size_t i = 0; i < kNumChannels; ++i) { + rgb[i] *= tone_map_gain; + } + + // Convert from Rec2020-linear to XYZD50. + skcms_Matrix3x3_apply(&rec2020_to_XYZD50, rgb); +} + +sk_sp write_clut(const uint8_t* grid_points, const uint8_t* grid_16) { + SkDynamicMemoryWStream s; + for (size_t i = 0; i < 16; ++i) { + s.write8(i < kNumChannels ? grid_points[i] : 0); // Grid size + } + s.write8(2); // Grid byte width (always 16-bit) + s.write8(0); // Reserved + s.write8(0); // Reserved + s.write8(0); // Reserved + + uint32_t value_count = kNumChannels; + for (uint32_t i = 0; i < kNumChannels; ++i) { + value_count *= grid_points[i]; + } + for (uint32_t i = 0; i < value_count; ++i) { + uint16_t value = reinterpret_cast(grid_16)[i]; + s.write16(value); + } + s.padToAlign4(); + return s.detachAsData(); +} + +// Write an A2B or B2A tag. +sk_sp write_mAB_or_mBA_tag(uint32_t type, + const skcms_Curve* b_curves, + const skcms_Curve* a_curves, + const uint8_t* grid_points, + const uint8_t* grid_16, + const skcms_Curve* m_curves, + const skcms_Matrix3x4* matrix) { + const size_t b_curves_offset = 32; + sk_sp b_curves_data[kNumChannels]; + size_t clut_offset = 0; + sk_sp clut; + size_t a_curves_offset = 0; + sk_sp a_curves_data[kNumChannels]; + + // The "B" curve is required. + SkASSERT(b_curves); + for (size_t i = 0; i < kNumChannels; ++i) { + b_curves_data[i] = write_trc_tag(b_curves[i]); + SkASSERT(b_curves_data[i]); + } + + // The "A" curve and CLUT are optional. + if (a_curves) { + SkASSERT(grid_points); + SkASSERT(grid_16); + + clut_offset = b_curves_offset; + for (size_t i = 0; i < kNumChannels; ++i) { + clut_offset += b_curves_data[i]->size(); + } + clut = write_clut(grid_points, grid_16); + SkASSERT(clut); + + a_curves_offset = clut_offset + clut->size(); + for (size_t i = 0; i < kNumChannels; ++i) { + a_curves_data[i] = write_trc_tag(a_curves[i]); + SkASSERT(a_curves_data[i]); + } + } + + // The "M" curves and matrix are not supported yet. + SkASSERT(!m_curves); + SkASSERT(!matrix); + + SkDynamicMemoryWStream s; + s.write32(SkEndian_SwapBE32(type)); // Type signature + s.write32(0); // Reserved + s.write8(kNumChannels); // Input channels + s.write8(kNumChannels); // Output channels + s.write16(0); // Reserved + s.write32(SkEndian_SwapBE32(b_curves_offset)); // B curve offset + s.write32(SkEndian_SwapBE32(0)); // Matrix offset (ignored) + s.write32(SkEndian_SwapBE32(0)); // M curve offset (ignored) + s.write32(SkEndian_SwapBE32(clut_offset)); // CLUT offset + s.write32(SkEndian_SwapBE32(a_curves_offset)); // A curve offset + SkASSERT(s.bytesWritten() == b_curves_offset); + for (size_t i = 0; i < kNumChannels; ++i) { + s.write(b_curves_data[i]->data(), b_curves_data[i]->size()); + } + if (a_curves) { + SkASSERT(s.bytesWritten() == clut_offset); + s.write(clut->data(), clut->size()); + SkASSERT(s.bytesWritten() == a_curves_offset); + for (size_t i = 0; i < kNumChannels; ++i) { + s.write(a_curves_data[i]->data(), a_curves_data[i]->size()); + } + } + return s.detachAsData(); +} + +sk_sp SkWriteICCProfile(const skcms_ICCProfile* profile, const char* desc) { + ICCHeader header; + + std::vector>> tags; + + // Compute profile description tag + tags.emplace_back(kTAG_desc, write_text_tag(desc)); + + // Compute primaries. + if (profile->has_toXYZD50) { + const auto& m = profile->toXYZD50; + tags.emplace_back(kTAG_rXYZ, write_xyz_tag(m.vals[0][0], m.vals[1][0], m.vals[2][0])); + tags.emplace_back(kTAG_gXYZ, write_xyz_tag(m.vals[0][1], m.vals[1][1], m.vals[2][1])); + tags.emplace_back(kTAG_bXYZ, write_xyz_tag(m.vals[0][2], m.vals[1][2], m.vals[2][2])); + } + + // Compute white point tag (must be D50) + tags.emplace_back(kTAG_wtpt, write_xyz_tag(kD50_x, kD50_y, kD50_z)); + + // Compute transfer curves. + if (profile->has_trc) { + tags.emplace_back(kTAG_rTRC, write_trc_tag(profile->trc[0])); + + // Use empty data to indicate that the entry should use the previous tag's + // data. + if (!memcmp(&profile->trc[1], &profile->trc[0], sizeof(profile->trc[0]))) { + tags.emplace_back(kTAG_gTRC, SkData::MakeEmpty()); + } else { + tags.emplace_back(kTAG_gTRC, write_trc_tag(profile->trc[1])); + } + + if (!memcmp(&profile->trc[2], &profile->trc[1], sizeof(profile->trc[1]))) { + tags.emplace_back(kTAG_bTRC, SkData::MakeEmpty()); + } else { + tags.emplace_back(kTAG_bTRC, write_trc_tag(profile->trc[2])); + } + } + + // Compute CICP. + if (profile->has_CICP) { + // The CICP tag is present in ICC 4.4, so update the header's version. + header.version = SkEndian_SwapBE32(0x04400000); + tags.emplace_back(kTAG_cicp, write_cicp_tag(profile->CICP)); + } + + // Compute A2B0. + if (profile->has_A2B) { + const auto& a2b = profile->A2B; + SkASSERT(a2b.output_channels == kNumChannels); + auto a2b_data = write_mAB_or_mBA_tag(kTAG_mABType, + a2b.output_curves, + a2b.input_channels ? a2b.input_curves : nullptr, + a2b.input_channels ? a2b.grid_points : nullptr, + a2b.input_channels ? a2b.grid_16 : nullptr, + a2b.matrix_channels ? a2b.matrix_curves : nullptr, + a2b.matrix_channels ? &a2b.matrix : nullptr); + tags.emplace_back(kTAG_A2B0, std::move(a2b_data)); + } + + // Compute B2A0. + if (profile->has_B2A) { + const auto& b2a = profile->B2A; + SkASSERT(b2a.input_channels == kNumChannels); + auto b2a_data = write_mAB_or_mBA_tag(kTAG_mBAType, + b2a.input_curves, + b2a.output_channels ? b2a.input_curves : nullptr, + b2a.output_channels ? b2a.grid_points : nullptr, + b2a.output_channels ? b2a.grid_16 : nullptr, + b2a.matrix_channels ? b2a.matrix_curves : nullptr, + b2a.matrix_channels ? &b2a.matrix : nullptr); + tags.emplace_back(kTAG_B2A0, std::move(b2a_data)); + } + + // Compute copyright tag + tags.emplace_back(kTAG_cprt, write_text_tag("Google Inc. 2016")); + + // Compute the size of the profile. + size_t tag_data_size = 0; + for (const auto& tag : tags) { + tag_data_size += tag.second->size(); + } + size_t tag_table_size = kICCTagTableEntrySize * tags.size(); + size_t profile_size = kICCHeaderSize + tag_table_size + tag_data_size; + + // Write the header. + header.data_color_space = SkEndian_SwapBE32(profile->data_color_space); + header.pcs = SkEndian_SwapBE32(profile->pcs); + header.size = SkEndian_SwapBE32(profile_size); + header.tag_count = SkEndian_SwapBE32(tags.size()); + + SkAutoMalloc profile_data(profile_size); + uint8_t* ptr = (uint8_t*)profile_data.get(); + memcpy(ptr, &header, sizeof(header)); + ptr += sizeof(header); + + // Write the tag table. Track the offset and size of the previous tag to + // compute each tag's offset. An empty SkData indicates that the previous + // tag is to be reused. + size_t last_tag_offset = sizeof(header) + tag_table_size; + size_t last_tag_size = 0; + for (const auto& tag : tags) { + if (!tag.second->isEmpty()) { + last_tag_offset = last_tag_offset + last_tag_size; + last_tag_size = tag.second->size(); + } + uint32_t tag_table_entry[3] = { + SkEndian_SwapBE32(tag.first), + SkEndian_SwapBE32(last_tag_offset), + SkEndian_SwapBE32(last_tag_size), + }; + memcpy(ptr, tag_table_entry, sizeof(tag_table_entry)); + ptr += sizeof(tag_table_entry); + } + + // Write the tags. + for (const auto& tag : tags) { + if (tag.second->isEmpty()) continue; + memcpy(ptr, tag.second->data(), tag.second->size()); + ptr += tag.second->size(); + } + + SkASSERT(profile_size == static_cast(ptr - (uint8_t*)profile_data.get())); + return SkData::MakeFromMalloc(profile_data.release(), profile_size); +} + +sk_sp SkWriteICCProfile(const skcms_TransferFunction& fn, const skcms_Matrix3x3& toXYZD50) { + skcms_ICCProfile profile; + memset(&profile, 0, sizeof(profile)); + std::vector trc_table; + std::vector a2b_grid; + + profile.data_color_space = skcms_Signature_RGB; + profile.pcs = skcms_Signature_XYZ; + + // Populate toXYZD50. + { + profile.has_toXYZD50 = true; + profile.toXYZD50 = toXYZD50; + } + + // Populate TRC (except for PQ). + if (!skcms_TransferFunction_isPQish(&fn)) { + profile.has_trc = true; + if (skcms_TransferFunction_isSRGBish(&fn)) { + profile.trc[0].table_entries = 0; + profile.trc[0].parametric = fn; + } else if (skcms_TransferFunction_isHLGish(&fn)) { + skcms_TransferFunction scaled_hlg = SkNamedTransferFn::kHLG; + scaled_hlg.f = 1 / 12.f - 1.f; + constexpr uint32_t kTrcTableSize = 65; + trc_table.resize(kTrcTableSize * 2); + for (uint32_t i = 0; i < kTrcTableSize; ++i) { + float x = i / (kTrcTableSize - 1.f); + float y = skcms_TransferFunction_eval(&scaled_hlg, x); + y *= compute_tone_map_gain(scaled_hlg, y); + SkICCFloatToTable16(y, &trc_table[2 * i]); + } + + profile.trc[0].table_entries = kTrcTableSize; + profile.trc[0].table_16 = reinterpret_cast(trc_table.data()); + } + memcpy(&profile.trc[1], &profile.trc[0], sizeof(profile.trc[0])); + memcpy(&profile.trc[2], &profile.trc[0], sizeof(profile.trc[0])); + } + + // Populate A2B (PQ only). + if (skcms_TransferFunction_isPQish(&fn)) { + profile.pcs = skcms_Signature_Lab; + + constexpr uint32_t kGridSize = 17; + profile.has_A2B = true; + profile.A2B.input_channels = kNumChannels; + profile.A2B.output_channels = kNumChannels; + for (size_t i = 0; i < 3; ++i) { + profile.A2B.input_curves[i].parametric = SkNamedTransferFn::kLinear; + profile.A2B.output_curves[i].parametric = SkNamedTransferFn::kLinear; + profile.A2B.grid_points[i] = kGridSize; + } + + a2b_grid.resize(kGridSize * kGridSize * kGridSize * kNumChannels * 2); + size_t a2b_grid_index = 0; + for (uint32_t r_index = 0; r_index < kGridSize; ++r_index) { + for (uint32_t g_index = 0; g_index < kGridSize; ++g_index) { + for (uint32_t b_index = 0; b_index < kGridSize; ++b_index) { + float rgb[3] = { + r_index / (kGridSize - 1.f), + g_index / (kGridSize - 1.f), + b_index / (kGridSize - 1.f), + }; + compute_lut_entry(toXYZD50, rgb); + SkICCFloatXYZD50ToGrid16Lab(rgb, &a2b_grid[a2b_grid_index]); + a2b_grid_index += 6; + } + } + } + for (size_t i = 0; i < kNumChannels; ++i) { + profile.A2B.grid_points[i] = kGridSize; + } + profile.A2B.grid_16 = reinterpret_cast(a2b_grid.data()); + + profile.has_B2A = true; + profile.B2A.input_channels = kNumChannels; + for (size_t i = 0; i < 3; ++i) { + profile.B2A.input_curves[i].parametric = SkNamedTransferFn::kLinear; + } + } + + // Populate CICP. + if (skcms_TransferFunction_isHLGish(&fn) || skcms_TransferFunction_isPQish(&fn)) { + profile.has_CICP = true; + profile.CICP.color_primaries = get_cicp_primaries(toXYZD50); + profile.CICP.transfer_characteristics = get_cicp_trfn(fn); + profile.CICP.matrix_coefficients = 0; + profile.CICP.video_full_range_flag = 1; + SkASSERT(profile.CICP.color_primaries); + SkASSERT(profile.CICP.transfer_characteristics); + } + + std::string description = get_desc_string(fn, toXYZD50); + return SkWriteICCProfile(&profile, description.c_str()); +} diff --git a/gfx/skia/skia/src/encode/SkICCPriv.h b/gfx/skia/skia/src/encode/SkICCPriv.h new file mode 100644 index 0000000000..18757705ea --- /dev/null +++ b/gfx/skia/skia/src/encode/SkICCPriv.h @@ -0,0 +1,63 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkICCPriv_DEFINED +#define SkICCPriv_DEFINED + +#include "include/core/SkTypes.h" // SkSetFourByteTag + +#include +#include + +// This is equal to the header size according to the ICC specification (128) +// plus the size of the tag count (4). We include the tag count since we +// always require it to be present anyway. +static constexpr size_t kICCHeaderSize = 132; + +// Contains a signature (4), offset (4), and size (4). +static constexpr size_t kICCTagTableEntrySize = 12; + +static constexpr uint32_t kRGB_ColorSpace = SkSetFourByteTag('R', 'G', 'B', ' '); +static constexpr uint32_t kCMYK_ColorSpace = SkSetFourByteTag('C', 'M', 'Y', 'K'); +static constexpr uint32_t kGray_ColorSpace = SkSetFourByteTag('G', 'R', 'A', 'Y'); +static constexpr uint32_t kDisplay_Profile = SkSetFourByteTag('m', 'n', 't', 'r'); +static constexpr uint32_t kInput_Profile = SkSetFourByteTag('s', 'c', 'n', 'r'); +static constexpr uint32_t kOutput_Profile = SkSetFourByteTag('p', 'r', 't', 'r'); +static constexpr uint32_t kColorSpace_Profile = SkSetFourByteTag('s', 'p', 'a', 'c'); +static constexpr uint32_t kXYZ_PCSSpace = SkSetFourByteTag('X', 'Y', 'Z', ' '); +static constexpr uint32_t kLAB_PCSSpace = SkSetFourByteTag('L', 'a', 'b', ' '); +static constexpr uint32_t kACSP_Signature = SkSetFourByteTag('a', 'c', 's', 'p'); + +static constexpr uint32_t kTAG_rXYZ = SkSetFourByteTag('r', 'X', 'Y', 'Z'); +static constexpr uint32_t kTAG_gXYZ = SkSetFourByteTag('g', 'X', 'Y', 'Z'); +static constexpr uint32_t kTAG_bXYZ = SkSetFourByteTag('b', 'X', 'Y', 'Z'); +static constexpr uint32_t kTAG_rTRC = SkSetFourByteTag('r', 'T', 'R', 'C'); +static constexpr uint32_t kTAG_gTRC = SkSetFourByteTag('g', 'T', 'R', 'C'); +static constexpr uint32_t kTAG_bTRC = SkSetFourByteTag('b', 'T', 'R', 'C'); +static constexpr uint32_t kTAG_kTRC = SkSetFourByteTag('k', 'T', 'R', 'C'); +static constexpr uint32_t kTAG_A2B0 = SkSetFourByteTag('A', '2', 'B', '0'); +static constexpr uint32_t kTAG_B2A0 = SkSetFourByteTag('B', '2', 'A', '0'); +static constexpr uint32_t kTAG_desc = SkSetFourByteTag('d', 'e', 's', 'c'); +static constexpr uint32_t kTAG_cicp = SkSetFourByteTag('c', 'i', 'c', 'p'); +static constexpr uint32_t kTAG_wtpt = SkSetFourByteTag('w', 't', 'p', 't'); +static constexpr uint32_t kTAG_cprt = SkSetFourByteTag('c', 'p', 'r', 't'); + +static constexpr uint32_t kTAG_CurveType = SkSetFourByteTag('c', 'u', 'r', 'v'); +static constexpr uint32_t kTAG_ParaCurveType = SkSetFourByteTag('p', 'a', 'r', 'a'); +static constexpr uint32_t kTAG_TextType = SkSetFourByteTag('m', 'l', 'u', 'c'); +static constexpr uint32_t kTAG_mABType = SkSetFourByteTag('m', 'A', 'B', ' '); +static constexpr uint32_t kTAG_mBAType = SkSetFourByteTag('m', 'B', 'A', ' '); + +enum ParaCurveType { + kExponential_ParaCurveType = 0, + kGAB_ParaCurveType = 1, + kGABC_ParaCurveType = 2, + kGABDE_ParaCurveType = 3, + kGABCDEF_ParaCurveType = 4, +}; + +#endif // SkICCPriv_DEFINED diff --git a/gfx/skia/skia/src/encode/SkImageEncoder.cpp b/gfx/skia/skia/src/encode/SkImageEncoder.cpp new file mode 100644 index 0000000000..72c4cf8b28 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkImageEncoder.cpp @@ -0,0 +1,110 @@ +/* + * Copyright 2009 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkImageEncoder.h" + +#include "include/codec/SkEncodedImageFormat.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkData.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypes.h" +#include "include/encode/SkJpegEncoder.h" +#include "include/encode/SkPngEncoder.h" +#include "include/encode/SkWebpEncoder.h" + +#if SK_ENABLE_NDK_IMAGES || SK_USE_CG_ENCODER || SK_USE_WIC_ENCODER +#include "src/encode/SkImageEncoderPriv.h" +#endif + +#if !defined(SK_ENCODE_JPEG)|| !defined(SK_ENCODE_PNG) || !defined(SK_ENCODE_WEBP) +#include + +class SkEncoder; +#endif + +#if !defined(SK_ENCODE_JPEG) +bool SkJpegEncoder::Encode(SkWStream*, const SkPixmap&, const Options&) { return false; } +std::unique_ptr SkJpegEncoder::Make(SkWStream*, const SkPixmap&, const Options&) { + return nullptr; +} +#endif + +#if !defined(SK_ENCODE_PNG) +bool SkPngEncoder::Encode(SkWStream*, const SkPixmap&, const Options&) { return false; } +std::unique_ptr SkPngEncoder::Make(SkWStream*, const SkPixmap&, const Options&) { + return nullptr; +} +#endif + +#if !defined(SK_ENCODE_WEBP) +bool SkWebpEncoder::Encode(SkWStream*, const SkPixmap&, const Options&) { return false; } +#endif + +bool SkEncodeImage(SkWStream* dst, const SkBitmap& src, SkEncodedImageFormat f, int q) { + SkPixmap pixmap; + return src.peekPixels(&pixmap) && SkEncodeImage(dst, pixmap, f, q); +} + +bool SkEncodeImage(SkWStream* dst, const SkPixmap& src, + SkEncodedImageFormat format, int quality) { + #ifdef SK_USE_CG_ENCODER + (void)quality; + return SkEncodeImageWithCG(dst, src, format); + #elif SK_USE_WIC_ENCODER + return SkEncodeImageWithWIC(dst, src, format, quality); + #elif SK_ENABLE_NDK_IMAGES + return SkEncodeImageWithNDK(dst, src, format, quality); + #else + switch(format) { + case SkEncodedImageFormat::kJPEG: { + SkJpegEncoder::Options opts; + opts.fQuality = quality; + return SkJpegEncoder::Encode(dst, src, opts); + } + case SkEncodedImageFormat::kPNG: { + SkPngEncoder::Options opts; + return SkPngEncoder::Encode(dst, src, opts); + } + case SkEncodedImageFormat::kWEBP: { + SkWebpEncoder::Options opts; + if (quality == 100) { + opts.fCompression = SkWebpEncoder::Compression::kLossless; + // Note: SkEncodeImage treats 0 quality as the lowest quality + // (greatest compression) and 100 as the highest quality (least + // compression). For kLossy, this matches libwebp's + // interpretation, so it is passed directly to libwebp. But + // with kLossless, libwebp always creates the highest quality + // image. In this case, fQuality is reinterpreted as how much + // effort (time) to put into making a smaller file. This API + // does not provide a way to specify this value (though it can + // be specified by using SkWebpEncoder::Encode) so we have to + // pick one arbitrarily. This value matches that chosen by + // blink::ImageEncoder::ComputeWebpOptions as well + // WebPConfigInit. + opts.fQuality = 75; + } else { + opts.fCompression = SkWebpEncoder::Compression::kLossy; + opts.fQuality = quality; + } + return SkWebpEncoder::Encode(dst, src, opts); + } + default: + return false; + } + #endif +} + +sk_sp SkEncodePixmap(const SkPixmap& src, SkEncodedImageFormat format, int quality) { + SkDynamicMemoryWStream stream; + return SkEncodeImage(&stream, src, format, quality) ? stream.detachAsData() : nullptr; +} + +sk_sp SkEncodeBitmap(const SkBitmap& src, SkEncodedImageFormat format, int quality) { + SkPixmap pixmap; + return src.peekPixels(&pixmap) ? SkEncodePixmap(pixmap, format, quality) : nullptr; +} diff --git a/gfx/skia/skia/src/encode/SkImageEncoderFns.h b/gfx/skia/skia/src/encode/SkImageEncoderFns.h new file mode 100644 index 0000000000..c567716280 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkImageEncoderFns.h @@ -0,0 +1,213 @@ +/* + * Copyright 2012 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageEncoderFns_DEFINED +#define SkImageEncoderFns_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypes.h" +#include "include/encode/SkICC.h" +#include "modules/skcms/skcms.h" + +#include + +typedef void (*transform_scanline_proc)(char* dst, const char* src, int width, int bpp); + +static inline void transform_scanline_memcpy(char* dst, const char* src, int width, int bpp) { + memcpy(dst, src, width * bpp); +} + +static inline void transform_scanline_A8_to_GrayAlpha(char* dst, const char* src, int width, int) { + for (int i = 0; i < width; i++) { + *dst++ = 0; + *dst++ = *src++; + } +} + + +static void skcms(char* dst, const char* src, int n, + skcms_PixelFormat srcFmt, skcms_AlphaFormat srcAlpha, + skcms_PixelFormat dstFmt, skcms_AlphaFormat dstAlpha) { + SkAssertResult(skcms_Transform(src, srcFmt, srcAlpha, nullptr, + dst, dstFmt, dstAlpha, nullptr, n)); +} + +static inline void transform_scanline_gray(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_G_8, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGB_888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_565(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_BGR_565, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGB_888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_RGBX(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGB_888 , skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_BGRX(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_BGRA_8888, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGB_888 , skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_444(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_ABGR_4444, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGB_888 , skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_rgbA(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_bgrA(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_BGRA_8888, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_to_premul_legacy(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_PremulAsEncoded); +} + +static inline void transform_scanline_BGRA(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_BGRA_8888, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_4444(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_ABGR_4444, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_101010x(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_1010102, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGB_161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_1010102(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_1010102, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_1010102_premul(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_1010102, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_bgr_101010x(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_BGRA_1010102, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGB_161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_bgra_1010102(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_BGRA_1010102, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_bgra_1010102_premul(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_BGRA_1010102, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_F16(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_hhhh, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_F16_premul(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_hhhh, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_F16_to_8888(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_hhhh, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_F16_premul_to_8888(char* dst, + const char* src, + int width, + int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_hhhh, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_F16_to_premul_8888(char* dst, + const char* src, + int width, + int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_hhhh, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_8888, skcms_AlphaFormat_PremulAsEncoded); +} + +static inline void transform_scanline_F32(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_ffff, skcms_AlphaFormat_Unpremul, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline void transform_scanline_F32_premul(char* dst, const char* src, int width, int) { + skcms(dst, src, width, + skcms_PixelFormat_RGBA_ffff, skcms_AlphaFormat_PremulAsEncoded, + skcms_PixelFormat_RGBA_16161616BE, skcms_AlphaFormat_Unpremul); +} + +static inline sk_sp icc_from_color_space(const SkColorSpace* cs, + const skcms_ICCProfile* profile, + const char* profile_description) { + // TODO(ccameron): Remove this check. + if (!cs) { + return nullptr; + } + + if (profile) { + return SkWriteICCProfile(profile, profile_description); + } + + skcms_Matrix3x3 toXYZD50; + if (cs->toXYZD50(&toXYZD50)) { + skcms_TransferFunction fn; + cs->transferFn(&fn); + return SkWriteICCProfile(fn, toXYZD50); + } + return nullptr; +} + +static inline sk_sp icc_from_color_space(const SkImageInfo& info, + const skcms_ICCProfile* profile, + const char* profile_description) { + return icc_from_color_space(info.colorSpace(), profile, profile_description); +} + +#endif // SkImageEncoderFns_DEFINED diff --git a/gfx/skia/skia/src/encode/SkImageEncoderPriv.h b/gfx/skia/skia/src/encode/SkImageEncoderPriv.h new file mode 100644 index 0000000000..9fedae51f6 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkImageEncoderPriv.h @@ -0,0 +1,51 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageEncoderPriv_DEFINED +#define SkImageEncoderPriv_DEFINED + +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "src/core/SkImageInfoPriv.h" + +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) || \ + defined(SK_BUILD_FOR_WIN) || defined(SK_ENABLE_NDK_IMAGES) +#include "include/codec/SkEncodedImageFormat.h" +class SkWStream; +#endif + +static inline bool SkPixmapIsValid(const SkPixmap& src) { + if (!SkImageInfoIsValid(src.info())) { + return false; + } + + if (!src.addr() || src.rowBytes() < src.info().minRowBytes()) { + return false; + } + + return true; +} + +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + bool SkEncodeImageWithCG(SkWStream*, const SkPixmap&, SkEncodedImageFormat); +#else + #define SkEncodeImageWithCG(...) false +#endif + +#ifdef SK_BUILD_FOR_WIN + bool SkEncodeImageWithWIC(SkWStream*, const SkPixmap&, SkEncodedImageFormat, int quality); +#else + #define SkEncodeImageWithWIC(...) false +#endif + +#ifdef SK_ENABLE_NDK_IMAGES + bool SkEncodeImageWithNDK(SkWStream*, const SkPixmap&, SkEncodedImageFormat, int quality); +#else + #define SkEncodeImageWithNDK(...) false +#endif + +#endif // SkImageEncoderPriv_DEFINED diff --git a/gfx/skia/skia/src/encode/SkJPEGWriteUtility.cpp b/gfx/skia/skia/src/encode/SkJPEGWriteUtility.cpp new file mode 100644 index 0000000000..024242d545 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkJPEGWriteUtility.cpp @@ -0,0 +1,79 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#include "src/encode/SkJPEGWriteUtility.h" + +#include "include/core/SkStream.h" +#include "include/private/base/SkTArray.h" +#include "src/codec/SkJpegPriv.h" + +#include +#include + +extern "C" { + #include "jerror.h" + #include "jmorecfg.h" +} + +/////////////////////////////////////////////////////////////////////////////// + +static void sk_init_destination(j_compress_ptr cinfo) { + skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest; + + dest->next_output_byte = dest->fBuffer; + dest->free_in_buffer = skjpeg_destination_mgr::kBufferSize; +} + +static boolean sk_empty_output_buffer(j_compress_ptr cinfo) { + skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest; + +// if (!dest->fStream->write(dest->fBuffer, skjpeg_destination_mgr::kBufferSize - dest->free_in_buffer)) + if (!dest->fStream->write(dest->fBuffer, + skjpeg_destination_mgr::kBufferSize)) { + ERREXIT(cinfo, JERR_FILE_WRITE); + return FALSE; + } + + dest->next_output_byte = dest->fBuffer; + dest->free_in_buffer = skjpeg_destination_mgr::kBufferSize; + return TRUE; +} + +static void sk_term_destination (j_compress_ptr cinfo) { + skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest; + + size_t size = skjpeg_destination_mgr::kBufferSize - dest->free_in_buffer; + if (size > 0) { + if (!dest->fStream->write(dest->fBuffer, size)) { + ERREXIT(cinfo, JERR_FILE_WRITE); + return; + } + } + + dest->fStream->flush(); +} + +skjpeg_destination_mgr::skjpeg_destination_mgr(SkWStream* stream) : fStream(stream) { + this->init_destination = sk_init_destination; + this->empty_output_buffer = sk_empty_output_buffer; + this->term_destination = sk_term_destination; +} + +void skjpeg_error_exit(j_common_ptr cinfo) { + skjpeg_error_mgr* error = (skjpeg_error_mgr*)cinfo->err; + + (*error->output_message) (cinfo); + + /* Let the memory manager delete any temp files before we die */ + jpeg_destroy(cinfo); + + if (error->fJmpBufStack.empty()) { + SK_ABORT("JPEG error with no jmp_buf set."); + } + longjmp(*error->fJmpBufStack.back(), -1); +} diff --git a/gfx/skia/skia/src/encode/SkJPEGWriteUtility.h b/gfx/skia/skia/src/encode/SkJPEGWriteUtility.h new file mode 100644 index 0000000000..c534bbf6c1 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkJPEGWriteUtility.h @@ -0,0 +1,42 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkJpegUtility_DEFINED +#define SkJpegUtility_DEFINED + +#include "include/core/SkTypes.h" + +#include + +extern "C" { + // We need to include stdio.h before jpeg because jpeg does not include it, but uses FILE + // See https://github.com/libjpeg-turbo/libjpeg-turbo/issues/17 + #include // IWYU pragma: keep + #include "jpeglib.h" +} + +class SkWStream; + +void skjpeg_error_exit(j_common_ptr cinfo); + +///////////////////////////////////////////////////////////////////////////// +/* Our destination struct for directing decompressed pixels to our stream + * object. + */ +struct SK_SPI skjpeg_destination_mgr : jpeg_destination_mgr { + skjpeg_destination_mgr(SkWStream* stream); + + SkWStream* const fStream; + + enum { + kBufferSize = 1024 + }; + uint8_t fBuffer[kBufferSize]; +}; + +#endif diff --git a/gfx/skia/skia/src/encode/SkJpegEncoder.cpp b/gfx/skia/skia/src/encode/SkJpegEncoder.cpp new file mode 100644 index 0000000000..d764a52ebc --- /dev/null +++ b/gfx/skia/skia/src/encode/SkJpegEncoder.cpp @@ -0,0 +1,419 @@ +/* + * Copyright 2007 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#ifdef SK_ENCODE_JPEG + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkYUVAInfo.h" +#include "include/core/SkYUVAPixmaps.h" +#include "include/encode/SkEncoder.h" +#include "include/encode/SkJpegEncoder.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkMSAN.h" +#include "src/codec/SkJpegConstants.h" +#include "src/codec/SkJpegPriv.h" +#include "src/encode/SkImageEncoderFns.h" +#include "src/encode/SkImageEncoderPriv.h" +#include "src/encode/SkJPEGWriteUtility.h" + +#include +#include +#include +#include +#include + +class SkColorSpace; + +extern "C" { + #include "jpeglib.h" + #include "jmorecfg.h" +} + +class SkJpegEncoderMgr final : SkNoncopyable { +public: + /* + * Create the decode manager + * Does not take ownership of stream. + */ + static std::unique_ptr Make(SkWStream* stream) { + return std::unique_ptr(new SkJpegEncoderMgr(stream)); + } + + bool setParams(const SkImageInfo& srcInfo, const SkJpegEncoder::Options& options); + bool setParams(const SkYUVAPixmapInfo& srcInfo, const SkJpegEncoder::Options& options); + + jpeg_compress_struct* cinfo() { return &fCInfo; } + + skjpeg_error_mgr* errorMgr() { return &fErrMgr; } + + transform_scanline_proc proc() const { return fProc; } + + ~SkJpegEncoderMgr() { + jpeg_destroy_compress(&fCInfo); + } + +private: + SkJpegEncoderMgr(SkWStream* stream) : fDstMgr(stream), fProc(nullptr) { + fCInfo.err = jpeg_std_error(&fErrMgr); + fErrMgr.error_exit = skjpeg_error_exit; + jpeg_create_compress(&fCInfo); + fCInfo.dest = &fDstMgr; + } + + jpeg_compress_struct fCInfo; + skjpeg_error_mgr fErrMgr; + skjpeg_destination_mgr fDstMgr; + transform_scanline_proc fProc; +}; + +bool SkJpegEncoderMgr::setParams(const SkImageInfo& srcInfo, const SkJpegEncoder::Options& options) +{ + auto chooseProc8888 = [&]() { + if (kUnpremul_SkAlphaType == srcInfo.alphaType() && + options.fAlphaOption == SkJpegEncoder::AlphaOption::kBlendOnBlack) { + return transform_scanline_to_premul_legacy; + } + return (transform_scanline_proc) nullptr; + }; + + J_COLOR_SPACE jpegColorType = JCS_EXT_RGBA; + int numComponents = 0; + switch (srcInfo.colorType()) { + case kRGBA_8888_SkColorType: + fProc = chooseProc8888(); + jpegColorType = JCS_EXT_RGBA; + numComponents = 4; + break; + case kBGRA_8888_SkColorType: + fProc = chooseProc8888(); + jpegColorType = JCS_EXT_BGRA; + numComponents = 4; + break; + case kRGB_565_SkColorType: + fProc = transform_scanline_565; + jpegColorType = JCS_RGB; + numComponents = 3; + break; + case kARGB_4444_SkColorType: + if (SkJpegEncoder::AlphaOption::kBlendOnBlack == options.fAlphaOption) { + return false; + } + + fProc = transform_scanline_444; + jpegColorType = JCS_RGB; + numComponents = 3; + break; + case kGray_8_SkColorType: + case kAlpha_8_SkColorType: + case kR8_unorm_SkColorType: + jpegColorType = JCS_GRAYSCALE; + numComponents = 1; + break; + case kRGBA_F16_SkColorType: + if (kUnpremul_SkAlphaType == srcInfo.alphaType() && + options.fAlphaOption == SkJpegEncoder::AlphaOption::kBlendOnBlack) { + fProc = transform_scanline_F16_to_premul_8888; + } else { + fProc = transform_scanline_F16_to_8888; + } + jpegColorType = JCS_EXT_RGBA; + numComponents = 4; + break; + default: + return false; + } + + fCInfo.image_width = srcInfo.width(); + fCInfo.image_height = srcInfo.height(); + fCInfo.in_color_space = jpegColorType; + fCInfo.input_components = numComponents; + jpeg_set_defaults(&fCInfo); + + if (numComponents != 1) { + switch (options.fDownsample) { + case SkJpegEncoder::Downsample::k420: + SkASSERT(2 == fCInfo.comp_info[0].h_samp_factor); + SkASSERT(2 == fCInfo.comp_info[0].v_samp_factor); + SkASSERT(1 == fCInfo.comp_info[1].h_samp_factor); + SkASSERT(1 == fCInfo.comp_info[1].v_samp_factor); + SkASSERT(1 == fCInfo.comp_info[2].h_samp_factor); + SkASSERT(1 == fCInfo.comp_info[2].v_samp_factor); + break; + case SkJpegEncoder::Downsample::k422: + fCInfo.comp_info[0].h_samp_factor = 2; + fCInfo.comp_info[0].v_samp_factor = 1; + SkASSERT(1 == fCInfo.comp_info[1].h_samp_factor); + SkASSERT(1 == fCInfo.comp_info[1].v_samp_factor); + SkASSERT(1 == fCInfo.comp_info[2].h_samp_factor); + SkASSERT(1 == fCInfo.comp_info[2].v_samp_factor); + break; + case SkJpegEncoder::Downsample::k444: + fCInfo.comp_info[0].h_samp_factor = 1; + fCInfo.comp_info[0].v_samp_factor = 1; + SkASSERT(1 == fCInfo.comp_info[1].h_samp_factor); + SkASSERT(1 == fCInfo.comp_info[1].v_samp_factor); + SkASSERT(1 == fCInfo.comp_info[2].h_samp_factor); + SkASSERT(1 == fCInfo.comp_info[2].v_samp_factor); + break; + } + } + + // Tells libjpeg-turbo to compute optimal Huffman coding tables + // for the image. This improves compression at the cost of + // slower encode performance. + fCInfo.optimize_coding = TRUE; + return true; +} + +// Convert a row of an SkYUVAPixmaps to a row of Y,U,V triples. +// TODO(ccameron): This is horribly inefficient. +static void yuva_copy_row(const SkYUVAPixmaps* src, int row, uint8_t* dst) { + int width = src->plane(0).width(); + switch (src->yuvaInfo().planeConfig()) { + case SkYUVAInfo::PlaneConfig::kY_U_V: { + auto [ssWidthU, ssHeightU] = src->yuvaInfo().planeSubsamplingFactors(1); + auto [ssWidthV, ssHeightV] = src->yuvaInfo().planeSubsamplingFactors(2); + const uint8_t* srcY = reinterpret_cast(src->plane(0).addr(0, row)); + const uint8_t* srcU = + reinterpret_cast(src->plane(1).addr(0, row / ssHeightU)); + const uint8_t* srcV = + reinterpret_cast(src->plane(2).addr(0, row / ssHeightV)); + for (int col = 0; col < width; ++col) { + dst[3 * col + 0] = srcY[col]; + dst[3 * col + 1] = srcU[col / ssWidthU]; + dst[3 * col + 2] = srcV[col / ssWidthV]; + } + break; + } + case SkYUVAInfo::PlaneConfig::kY_UV: { + auto [ssWidthUV, ssHeightUV] = src->yuvaInfo().planeSubsamplingFactors(1); + const uint8_t* srcY = reinterpret_cast(src->plane(0).addr(0, row)); + const uint8_t* srcUV = + reinterpret_cast(src->plane(1).addr(0, row / ssHeightUV)); + for (int col = 0; col < width; ++col) { + dst[3 * col + 0] = srcY[col]; + dst[3 * col + 1] = srcUV[2 * (col / ssWidthUV) + 0]; + dst[3 * col + 2] = srcUV[2 * (col / ssWidthUV) + 1]; + } + break; + } + default: + break; + } +} + +bool SkJpegEncoderMgr::setParams(const SkYUVAPixmapInfo& srcInfo, + const SkJpegEncoder::Options& options) { + fCInfo.image_width = srcInfo.yuvaInfo().width(); + fCInfo.image_height = srcInfo.yuvaInfo().height(); + fCInfo.in_color_space = JCS_YCbCr; + fCInfo.input_components = 3; + jpeg_set_defaults(&fCInfo); + + // Support no color space conversion. + if (srcInfo.yuvColorSpace() != kJPEG_Full_SkYUVColorSpace) { + return false; + } + + // Support only 8-bit data. + switch (srcInfo.dataType()) { + case SkYUVAPixmapInfo::DataType::kUnorm8: + break; + default: + return false; + } + + // Support only Y,U,V and Y,UV configurations (they are the only ones supported by + // yuva_copy_row). + switch (srcInfo.yuvaInfo().planeConfig()) { + case SkYUVAInfo::PlaneConfig::kY_U_V: + case SkYUVAInfo::PlaneConfig::kY_UV: + break; + default: + return false; + } + + // Specify to the encoder to use the same subsampling as the input image. The U and V planes + // always have a sampling factor of 1. + auto [ssHoriz, ssVert] = SkYUVAInfo::SubsamplingFactors(srcInfo.yuvaInfo().subsampling()); + fCInfo.comp_info[0].h_samp_factor = ssHoriz; + fCInfo.comp_info[0].v_samp_factor = ssVert; + + fCInfo.optimize_coding = TRUE; + return true; +} + +std::unique_ptr SkJpegEncoder::Make(SkWStream* dst, + const SkPixmap& src, + const Options& options) { + return Make(dst, &src, nullptr, nullptr, options); +} + +std::unique_ptr SkJpegEncoder::Make(SkWStream* dst, + const SkYUVAPixmaps& src, + const SkColorSpace* srcColorSpace, + const Options& options) { + return Make(dst, nullptr, &src, srcColorSpace, options); +} + +std::unique_ptr SkJpegEncoder::Make(SkWStream* dst, + const SkPixmap* src, + const SkYUVAPixmaps* srcYUVA, + const SkColorSpace* srcYUVAColorSpace, + const Options& options) { + // Exactly one of |src| or |srcYUVA| should be specified. + if (srcYUVA) { + SkASSERT(!src); + if (!srcYUVA->isValid()) { + return nullptr; + } + } else { + SkASSERT(src); + if (!src || !SkPixmapIsValid(*src)) { + return nullptr; + } + } + + std::unique_ptr encoderMgr = SkJpegEncoderMgr::Make(dst); + + skjpeg_error_mgr::AutoPushJmpBuf jmp(encoderMgr->errorMgr()); + if (setjmp(jmp)) { + return nullptr; + } + + if (srcYUVA) { + if (!encoderMgr->setParams(srcYUVA->pixmapsInfo(), options)) { + return nullptr; + } + } else { + if (!encoderMgr->setParams(src->info(), options)) { + return nullptr; + } + } + + jpeg_set_quality(encoderMgr->cinfo(), options.fQuality, TRUE); + jpeg_start_compress(encoderMgr->cinfo(), TRUE); + + // Write XMP metadata. This will only write the standard XMP segment. + // TODO(ccameron): Split this into a standard and extended XMP segment if needed. + if (options.xmpMetadata) { + SkDynamicMemoryWStream s; + s.write(kXMPStandardSig, sizeof(kXMPStandardSig)); + s.write(options.xmpMetadata->data(), options.xmpMetadata->size()); + auto data = s.detachAsData(); + jpeg_write_marker(encoderMgr->cinfo(), kXMPMarker, data->bytes(), data->size()); + } + + // Write the ICC profile. + // TODO(ccameron): This limits ICC profile size to a single segment's parameters (less than + // 64k). Split larger profiles into more segments. + sk_sp icc = icc_from_color_space(srcYUVA ? srcYUVAColorSpace : src->colorSpace(), + options.fICCProfile, + options.fICCProfileDescription); + if (icc) { + // Create a contiguous block of memory with the icc signature followed by the profile. + sk_sp markerData = + SkData::MakeUninitialized(kICCMarkerHeaderSize + icc->size()); + uint8_t* ptr = (uint8_t*) markerData->writable_data(); + memcpy(ptr, kICCSig, sizeof(kICCSig)); + ptr += sizeof(kICCSig); + *ptr++ = 1; // This is the first marker. + *ptr++ = 1; // Out of one total markers. + memcpy(ptr, icc->data(), icc->size()); + + jpeg_write_marker(encoderMgr->cinfo(), kICCMarker, markerData->bytes(), markerData->size()); + } + + if (srcYUVA) { + return std::unique_ptr(new SkJpegEncoder(std::move(encoderMgr), srcYUVA)); + } + return std::unique_ptr(new SkJpegEncoder(std::move(encoderMgr), *src)); +} + +SkJpegEncoder::SkJpegEncoder(std::unique_ptr encoderMgr, const SkPixmap& src) + : INHERITED(src, + encoderMgr->proc() ? encoderMgr->cinfo()->input_components * src.width() : 0) + , fEncoderMgr(std::move(encoderMgr)) {} + +SkJpegEncoder::SkJpegEncoder(std::unique_ptr encoderMgr, const SkYUVAPixmaps* src) + : INHERITED(src->plane(0), encoderMgr->cinfo()->input_components * src->yuvaInfo().width()) + , fEncoderMgr(std::move(encoderMgr)) + , fSrcYUVA(src) {} + +SkJpegEncoder::~SkJpegEncoder() {} + +bool SkJpegEncoder::onEncodeRows(int numRows) { + skjpeg_error_mgr::AutoPushJmpBuf jmp(fEncoderMgr->errorMgr()); + if (setjmp(jmp)) { + return false; + } + + if (fSrcYUVA) { + // TODO(ccameron): Consider using jpeg_write_raw_data, to avoid having to re-pack the data. + for (int i = 0; i < numRows; i++) { + yuva_copy_row(fSrcYUVA, fCurrRow + i, fStorage.get()); + JSAMPLE* jpegSrcRow = fStorage.get(); + jpeg_write_scanlines(fEncoderMgr->cinfo(), &jpegSrcRow, 1); + } + } else { + const size_t srcBytes = SkColorTypeBytesPerPixel(fSrc.colorType()) * fSrc.width(); + const size_t jpegSrcBytes = fEncoderMgr->cinfo()->input_components * fSrc.width(); + const void* srcRow = fSrc.addr(0, fCurrRow); + for (int i = 0; i < numRows; i++) { + JSAMPLE* jpegSrcRow = (JSAMPLE*)srcRow; + if (fEncoderMgr->proc()) { + sk_msan_assert_initialized(srcRow, SkTAddOffset(srcRow, srcBytes)); + fEncoderMgr->proc()((char*)fStorage.get(), + (const char*)srcRow, + fSrc.width(), + fEncoderMgr->cinfo()->input_components); + jpegSrcRow = fStorage.get(); + sk_msan_assert_initialized(jpegSrcRow, + SkTAddOffset(jpegSrcRow, jpegSrcBytes)); + } else { + // Same as above, but this repetition allows determining whether a + // proc was used when msan asserts. + sk_msan_assert_initialized(jpegSrcRow, + SkTAddOffset(jpegSrcRow, jpegSrcBytes)); + } + + jpeg_write_scanlines(fEncoderMgr->cinfo(), &jpegSrcRow, 1); + srcRow = SkTAddOffset(srcRow, fSrc.rowBytes()); + } + } + + fCurrRow += numRows; + if (fCurrRow == fSrc.height()) { + jpeg_finish_compress(fEncoderMgr->cinfo()); + } + + return true; +} + +bool SkJpegEncoder::Encode(SkWStream* dst, const SkPixmap& src, const Options& options) { + auto encoder = SkJpegEncoder::Make(dst, src, options); + return encoder.get() && encoder->encodeRows(src.height()); +} + +bool SkJpegEncoder::Encode(SkWStream* dst, + const SkYUVAPixmaps& src, + const SkColorSpace* srcColorSpace, + const Options& options) { + auto encoder = SkJpegEncoder::Make(dst, src, srcColorSpace, options); + return encoder.get() && encoder->encodeRows(src.yuvaInfo().height()); +} + +#endif diff --git a/gfx/skia/skia/src/encode/SkJpegGainmapEncoder.cpp b/gfx/skia/skia/src/encode/SkJpegGainmapEncoder.cpp new file mode 100644 index 0000000000..80709def8c --- /dev/null +++ b/gfx/skia/skia/src/encode/SkJpegGainmapEncoder.cpp @@ -0,0 +1,413 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkJpegGainmapEncoder.h" + +#ifdef SK_ENCODE_JPEG + +#include "include/core/SkBitmap.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkStream.h" +#include "include/encode/SkJpegEncoder.h" +#include "include/private/SkGainmapInfo.h" +#include "src/codec/SkCodecPriv.h" +#include "src/codec/SkJpegConstants.h" +#include "src/codec/SkJpegMultiPicture.h" +#include "src/codec/SkJpegPriv.h" +#include "src/codec/SkJpegSegmentScan.h" + +#include + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// XMP helpers + +void xmp_write_prefix(SkDynamicMemoryWStream& s, const std::string& ns, const std::string& attrib) { + s.writeText(ns.c_str()); + s.writeText(":"); + s.writeText(attrib.c_str()); + s.writeText("=\""); +} + +void xmp_write_suffix(SkDynamicMemoryWStream& s, bool newLine) { + s.writeText("\""); + if (newLine) { + s.writeText("\n"); + } +} + +void xmp_write_per_channel_attr(SkDynamicMemoryWStream& s, + const std::string& ns, + const std::string& attrib, + SkScalar r, + SkScalar g, + SkScalar b, + bool newLine = true) { + xmp_write_prefix(s, ns, attrib); + if (r == g && r == b) { + s.writeScalarAsText(r); + } else { + s.writeScalarAsText(r); + s.writeText(","); + s.writeScalarAsText(g); + s.writeText(","); + s.writeScalarAsText(b); + } + xmp_write_suffix(s, newLine); +} + +void xmp_write_scalar_attr(SkDynamicMemoryWStream& s, + const std::string& ns, + const std::string& attrib, + SkScalar value, + bool newLine = true) { + xmp_write_prefix(s, ns, attrib); + s.writeScalarAsText(value); + xmp_write_suffix(s, newLine); +} + +void xmp_write_decimal_attr(SkDynamicMemoryWStream& s, + const std::string& ns, + const std::string& attrib, + int32_t value, + bool newLine = true) { + xmp_write_prefix(s, ns, attrib); + s.writeDecAsText(value); + xmp_write_suffix(s, newLine); +} + +void xmp_write_string_attr(SkDynamicMemoryWStream& s, + const std::string& ns, + const std::string& attrib, + const std::string& value, + bool newLine = true) { + xmp_write_prefix(s, ns, attrib); + s.writeText(value.c_str()); + xmp_write_suffix(s, newLine); +} + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// JpegR encoding + +bool SkJpegGainmapEncoder::EncodeJpegR(SkWStream* dst, + const SkPixmap& base, + const SkJpegEncoder::Options& baseOptions, + const SkPixmap& gainmap, + const SkJpegEncoder::Options& gainmapOptions, + const SkGainmapInfo& gainmapInfo) { + return EncodeHDRGM(dst, base, baseOptions, gainmap, gainmapOptions, gainmapInfo); +} + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// HDRGM encoding + +// Generate the XMP metadata for an HDRGM file. +sk_sp get_hdrgm_xmp_data(const SkGainmapInfo& gainmapInfo) { + const float kLog2 = sk_float_log(2.f); + SkDynamicMemoryWStream s; + s.writeText( + "\n" + " \n" + " \n" + " \n" + ""); + return s.detachAsData(); +} + +// Generate the GContainer metadata for an image with a JPEG gainmap. +static sk_sp get_gcontainer_xmp_data(size_t gainmapItemLength) { + SkDynamicMemoryWStream s; + s.writeText( + "\n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + " \n" + "\n"); + return s.detachAsData(); +} + +// Split an SkData into segments. +std::vector> get_hdrgm_image_segments(sk_sp image, + size_t segmentMaxDataSize) { + // Compute the total size of the header to a gainmap image segment (not including the 2 bytes + // for the segment size, which the encoder is responsible for writing). + constexpr size_t kGainmapHeaderSize = sizeof(kGainmapSig) + 2 * kGainmapMarkerIndexSize; + + // Compute the payload size for each segment. + const size_t kGainmapPayloadSize = segmentMaxDataSize - kGainmapHeaderSize; + + // Compute the number of segments we'll need. + const size_t segmentCount = (image->size() + kGainmapPayloadSize - 1) / kGainmapPayloadSize; + std::vector> result; + result.reserve(segmentCount); + + // Move |imageData| through |image| until it hits |imageDataEnd|. + const uint8_t* imageData = image->bytes(); + const uint8_t* imageDataEnd = image->bytes() + image->size(); + while (imageData < imageDataEnd) { + SkDynamicMemoryWStream segmentStream; + + // Write the signature. + segmentStream.write(kGainmapSig, sizeof(kGainmapSig)); + + // Write the segment index as big-endian. + size_t segmentIndex = result.size() + 1; + uint8_t segmentIndexBytes[2] = { + static_cast(segmentIndex / 256u), + static_cast(segmentIndex % 256u), + }; + segmentStream.write(segmentIndexBytes, sizeof(segmentIndexBytes)); + + // Write the segment count as big-endian. + uint8_t segmentCountBytes[2] = { + static_cast(segmentCount / 256u), + static_cast(segmentCount % 256u), + }; + segmentStream.write(segmentCountBytes, sizeof(segmentCountBytes)); + + // Verify that our header size math is correct. + SkASSERT(segmentStream.bytesWritten() == kGainmapHeaderSize); + + // Write the rest of the segment. + size_t bytesToWrite = + std::min(imageDataEnd - imageData, static_cast(kGainmapPayloadSize)); + segmentStream.write(imageData, bytesToWrite); + imageData += bytesToWrite; + + // Verify that our data size math is correct. + if (segmentIndex == segmentCount) { + SkASSERT(segmentStream.bytesWritten() <= segmentMaxDataSize); + } else { + SkASSERT(segmentStream.bytesWritten() == segmentMaxDataSize); + } + result.push_back(segmentStream.detachAsData()); + } + + // Verify that our segment count math was correct. + SkASSERT(imageData == imageDataEnd); + SkASSERT(result.size() == segmentCount); + return result; +} + +static sk_sp encode_to_data(const SkPixmap& pm, + const SkJpegEncoder::Options& options, + SkData* xmpMetadata) { + SkJpegEncoder::Options optionsWithXmp = options; + optionsWithXmp.xmpMetadata = xmpMetadata; + SkDynamicMemoryWStream encodeStream; + auto encoder = SkJpegEncoder::Make(&encodeStream, pm, optionsWithXmp); + if (!encoder || !encoder->encodeRows(pm.height())) { + return nullptr; + } + return encodeStream.detachAsData(); +} + +static sk_sp get_mpf_segment(const SkJpegMultiPictureParameters& mpParams) { + SkDynamicMemoryWStream s; + auto segmentParameters = mpParams.serialize(); + const size_t mpParameterLength = kJpegSegmentParameterLengthSize + segmentParameters->size(); + s.write8(0xFF); + s.write8(kMpfMarker); + s.write8(mpParameterLength / 256); + s.write8(mpParameterLength % 256); + s.write(segmentParameters->data(), segmentParameters->size()); + return s.detachAsData(); +} + +bool SkJpegGainmapEncoder::EncodeHDRGM(SkWStream* dst, + const SkPixmap& base, + const SkJpegEncoder::Options& baseOptions, + const SkPixmap& gainmap, + const SkJpegEncoder::Options& gainmapOptions, + const SkGainmapInfo& gainmapInfo) { + // Encode the gainmap image with the HDRGM XMP metadata. + sk_sp gainmapData; + { + // We will include the HDRGM XMP metadata in the gainmap image. + auto hdrgmXmp = get_hdrgm_xmp_data(gainmapInfo); + gainmapData = encode_to_data(gainmap, gainmapOptions, hdrgmXmp.get()); + if (!gainmapData) { + SkCodecPrintf("Failed to encode gainmap image.\n"); + return false; + } + } + + // Encode the base image with the Container XMP metadata. + sk_sp baseData; + { + auto containerXmp = get_gcontainer_xmp_data(static_cast(gainmapData->size())); + baseData = encode_to_data(base, baseOptions, containerXmp.get()); + if (!baseData) { + SkCodecPrintf("Failed to encode base image.\n"); + return false; + } + } + + // Combine them into an MPF. + const SkData* images[] = { + baseData.get(), + gainmapData.get(), + }; + return MakeMPF(dst, images, 2); +} + +bool SkJpegGainmapEncoder::MakeMPF(SkWStream* dst, const SkData** images, size_t imageCount) { + if (imageCount < 1) { + return true; + } + + // Create a scan of the primary image. + SkJpegSegmentScanner primaryScan; + primaryScan.onBytes(images[0]->data(), images[0]->size()); + if (!primaryScan.isDone()) { + SkCodecPrintf("Failed to scan encoded primary image header.\n"); + return false; + } + + // Copy the primary image up to its StartOfScan, then insert the MPF segment, then copy the rest + // of the primary image, and all other images. + size_t bytesRead = 0; + size_t bytesWritten = 0; + for (const auto& segment : primaryScan.getSegments()) { + // Write all ECD before this segment. + { + size_t ecdBytesToWrite = segment.offset - bytesRead; + if (!dst->write(images[0]->bytes() + bytesRead, ecdBytesToWrite)) { + SkCodecPrintf("Failed to write entropy coded data.\n"); + return false; + } + bytesWritten += ecdBytesToWrite; + bytesRead = segment.offset; + } + + // If this isn't a StartOfScan, write just the segment. + if (segment.marker != kJpegMarkerStartOfScan) { + const size_t bytesToWrite = kJpegMarkerCodeSize + segment.parameterLength; + if (!dst->write(images[0]->bytes() + bytesRead, bytesToWrite)) { + SkCodecPrintf("Failed to copy segment.\n"); + return false; + } + bytesWritten += bytesToWrite; + bytesRead += bytesToWrite; + continue; + } + + // We're now at the StartOfScan. + const size_t bytesRemaining = images[0]->size() - bytesRead; + + // Compute the MPF offsets for the images. + SkJpegMultiPictureParameters mpParams; + { + mpParams.images.resize(imageCount); + const size_t mpSegmentSize = kJpegMarkerCodeSize + kJpegSegmentParameterLengthSize + + mpParams.serialize()->size(); + mpParams.images[0].size = + static_cast(bytesWritten + mpSegmentSize + bytesRemaining); + uint32_t offset = + static_cast(bytesRemaining + mpSegmentSize - kJpegMarkerCodeSize - + kJpegSegmentParameterLengthSize - sizeof(kMpfSig)); + for (size_t i = 0; i < imageCount; ++i) { + mpParams.images[i].dataOffset = offset; + mpParams.images[i].size = static_cast(images[i]->size()); + offset += mpParams.images[i].size; + } + } + + // Write the MPF segment. + auto mpfSegment = get_mpf_segment(mpParams); + if (!dst->write(mpfSegment->data(), mpfSegment->size())) { + SkCodecPrintf("Failed to write MPF segment.\n"); + return false; + } + + // Write the rest of the primary file. + if (!dst->write(images[0]->bytes() + bytesRead, bytesRemaining)) { + SkCodecPrintf("Failed to write remainder of primary image.\n"); + return false; + } + bytesRead += bytesRemaining; + SkASSERT(bytesRead == images[0]->size()); + break; + } + + // Write the remaining files. + for (size_t i = 1; i < imageCount; ++i) { + if (!dst->write(images[i]->data(), images[i]->size())) { + SkCodecPrintf("Failed to write auxiliary image.\n"); + } + } + return true; +} + +#endif // SK_ENCODE_JPEG diff --git a/gfx/skia/skia/src/encode/SkPngEncoder.cpp b/gfx/skia/skia/src/encode/SkPngEncoder.cpp new file mode 100644 index 0000000000..55ca9f5239 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkPngEncoder.cpp @@ -0,0 +1,493 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#ifdef SK_ENCODE_PNG + +#include "include/core/SkAlphaType.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkDataTable.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/encode/SkEncoder.h" +#include "include/encode/SkPngEncoder.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTemplates.h" +#include "modules/skcms/skcms.h" +#include "src/base/SkMSAN.h" +#include "src/codec/SkPngPriv.h" +#include "src/encode/SkImageEncoderFns.h" +#include "src/encode/SkImageEncoderPriv.h" + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +static_assert(PNG_FILTER_NONE == (int)SkPngEncoder::FilterFlag::kNone, "Skia libpng filter err."); +static_assert(PNG_FILTER_SUB == (int)SkPngEncoder::FilterFlag::kSub, "Skia libpng filter err."); +static_assert(PNG_FILTER_UP == (int)SkPngEncoder::FilterFlag::kUp, "Skia libpng filter err."); +static_assert(PNG_FILTER_AVG == (int)SkPngEncoder::FilterFlag::kAvg, "Skia libpng filter err."); +static_assert(PNG_FILTER_PAETH == (int)SkPngEncoder::FilterFlag::kPaeth, "Skia libpng filter err."); +static_assert(PNG_ALL_FILTERS == (int)SkPngEncoder::FilterFlag::kAll, "Skia libpng filter err."); + +static constexpr bool kSuppressPngEncodeWarnings = true; + +static void sk_error_fn(png_structp png_ptr, png_const_charp msg) { + if (!kSuppressPngEncodeWarnings) { + SkDebugf("libpng encode error: %s\n", msg); + } + + longjmp(png_jmpbuf(png_ptr), 1); +} + +static void sk_write_fn(png_structp png_ptr, png_bytep data, png_size_t len) { + SkWStream* stream = (SkWStream*)png_get_io_ptr(png_ptr); + if (!stream->write(data, len)) { + png_error(png_ptr, "sk_write_fn cannot write to stream"); + } +} + +class SkPngEncoderMgr final : SkNoncopyable { +public: + + /* + * Create the decode manager + * Does not take ownership of stream + */ + static std::unique_ptr Make(SkWStream* stream); + + bool setHeader(const SkImageInfo& srcInfo, const SkPngEncoder::Options& options); + bool setColorSpace(const SkImageInfo& info, const SkPngEncoder::Options& options); + bool writeInfo(const SkImageInfo& srcInfo); + void chooseProc(const SkImageInfo& srcInfo); + + png_structp pngPtr() { return fPngPtr; } + png_infop infoPtr() { return fInfoPtr; } + int pngBytesPerPixel() const { return fPngBytesPerPixel; } + transform_scanline_proc proc() const { return fProc; } + + ~SkPngEncoderMgr() { + png_destroy_write_struct(&fPngPtr, &fInfoPtr); + } + +private: + + SkPngEncoderMgr(png_structp pngPtr, png_infop infoPtr) + : fPngPtr(pngPtr) + , fInfoPtr(infoPtr) + {} + + png_structp fPngPtr; + png_infop fInfoPtr; + int fPngBytesPerPixel; + transform_scanline_proc fProc; +}; + +std::unique_ptr SkPngEncoderMgr::Make(SkWStream* stream) { + png_structp pngPtr = + png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, sk_error_fn, nullptr); + if (!pngPtr) { + return nullptr; + } + + png_infop infoPtr = png_create_info_struct(pngPtr); + if (!infoPtr) { + png_destroy_write_struct(&pngPtr, nullptr); + return nullptr; + } + + png_set_write_fn(pngPtr, (void*)stream, sk_write_fn, nullptr); + return std::unique_ptr(new SkPngEncoderMgr(pngPtr, infoPtr)); +} + +bool SkPngEncoderMgr::setHeader(const SkImageInfo& srcInfo, const SkPngEncoder::Options& options) { + if (setjmp(png_jmpbuf(fPngPtr))) { + return false; + } + + int pngColorType; + png_color_8 sigBit; + int bitDepth = 8; + switch (srcInfo.colorType()) { + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: + case kRGBA_F32_SkColorType: + sigBit.red = 16; + sigBit.green = 16; + sigBit.blue = 16; + sigBit.alpha = 16; + bitDepth = 16; + pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; + fPngBytesPerPixel = 8; + break; + case kGray_8_SkColorType: + sigBit.gray = 8; + pngColorType = PNG_COLOR_TYPE_GRAY; + fPngBytesPerPixel = 1; + SkASSERT(srcInfo.isOpaque()); + break; + case kRGBA_8888_SkColorType: + case kBGRA_8888_SkColorType: + sigBit.red = 8; + sigBit.green = 8; + sigBit.blue = 8; + sigBit.alpha = 8; + pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; + fPngBytesPerPixel = srcInfo.isOpaque() ? 3 : 4; + break; + case kRGB_888x_SkColorType: + sigBit.red = 8; + sigBit.green = 8; + sigBit.blue = 8; + pngColorType = PNG_COLOR_TYPE_RGB; + fPngBytesPerPixel = 3; + SkASSERT(srcInfo.isOpaque()); + break; + case kARGB_4444_SkColorType: + if (kUnpremul_SkAlphaType == srcInfo.alphaType()) { + return false; + } + + sigBit.red = 4; + sigBit.green = 4; + sigBit.blue = 4; + sigBit.alpha = 4; + pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; + fPngBytesPerPixel = srcInfo.isOpaque() ? 3 : 4; + break; + case kRGB_565_SkColorType: + sigBit.red = 5; + sigBit.green = 6; + sigBit.blue = 5; + pngColorType = PNG_COLOR_TYPE_RGB; + fPngBytesPerPixel = 3; + SkASSERT(srcInfo.isOpaque()); + break; + case kAlpha_8_SkColorType: // store as gray+alpha, but ignore gray + sigBit.gray = kGraySigBit_GrayAlphaIsJustAlpha; + sigBit.alpha = 8; + pngColorType = PNG_COLOR_TYPE_GRAY_ALPHA; + fPngBytesPerPixel = 2; + break; + case kRGBA_1010102_SkColorType: + bitDepth = 16; + sigBit.red = 10; + sigBit.green = 10; + sigBit.blue = 10; + sigBit.alpha = 2; + pngColorType = srcInfo.isOpaque() ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA; + fPngBytesPerPixel = 8; + break; + case kRGB_101010x_SkColorType: + bitDepth = 16; + sigBit.red = 10; + sigBit.green = 10; + sigBit.blue = 10; + pngColorType = PNG_COLOR_TYPE_RGB; + fPngBytesPerPixel = 6; + break; + default: + return false; + } + + png_set_IHDR(fPngPtr, fInfoPtr, srcInfo.width(), srcInfo.height(), + bitDepth, pngColorType, + PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, + PNG_FILTER_TYPE_BASE); + png_set_sBIT(fPngPtr, fInfoPtr, &sigBit); + + int filters = (int)options.fFilterFlags & (int)SkPngEncoder::FilterFlag::kAll; + SkASSERT(filters == (int)options.fFilterFlags); + png_set_filter(fPngPtr, PNG_FILTER_TYPE_BASE, filters); + + int zlibLevel = std::min(std::max(0, options.fZLibLevel), 9); + SkASSERT(zlibLevel == options.fZLibLevel); + png_set_compression_level(fPngPtr, zlibLevel); + + // Set comments in tEXt chunk + const sk_sp& comments = options.fComments; + if (comments != nullptr) { + std::vector png_texts(comments->count()); + std::vector clippedKeys; + for (int i = 0; i < comments->count() / 2; ++i) { + const char* keyword; + const char* originalKeyword = comments->atStr(2 * i); + const char* text = comments->atStr(2 * i + 1); + if (strlen(originalKeyword) <= PNG_KEYWORD_MAX_LENGTH) { + keyword = originalKeyword; + } else { + SkDEBUGFAILF("PNG tEXt keyword should be no longer than %d.", + PNG_KEYWORD_MAX_LENGTH); + clippedKeys.emplace_back(originalKeyword, PNG_KEYWORD_MAX_LENGTH); + keyword = clippedKeys.back().c_str(); + } + // It seems safe to convert png_const_charp to png_charp for key/text, + // and we don't have to provide text_length and other fields as we're providing + // 0-terminated c_str with PNG_TEXT_COMPRESSION_NONE (no compression, no itxt). + png_texts[i].compression = PNG_TEXT_COMPRESSION_NONE; + png_texts[i].key = (png_charp)keyword; + png_texts[i].text = (png_charp)text; + } + png_set_text(fPngPtr, fInfoPtr, png_texts.data(), png_texts.size()); + } + + return true; +} + +static transform_scanline_proc choose_proc(const SkImageInfo& info) { + switch (info.colorType()) { + case kUnknown_SkColorType: + break; + + // TODO: I don't think this can just use kRGBA's procs. + // kPremul is especially tricky here, since it's presumably TF⁻¹(rgb * a), + // so to get at unpremul rgb we'd need to undo the transfer function first. + case kSRGBA_8888_SkColorType: return nullptr; + + case kRGBA_8888_SkColorType: + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + return transform_scanline_RGBX; + case kUnpremul_SkAlphaType: + return transform_scanline_memcpy; + case kPremul_SkAlphaType: + return transform_scanline_rgbA; + default: + SkASSERT(false); + return nullptr; + } + case kBGRA_8888_SkColorType: + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + return transform_scanline_BGRX; + case kUnpremul_SkAlphaType: + return transform_scanline_BGRA; + case kPremul_SkAlphaType: + return transform_scanline_bgrA; + default: + SkASSERT(false); + return nullptr; + } + case kRGB_565_SkColorType: + return transform_scanline_565; + case kRGB_888x_SkColorType: + return transform_scanline_RGBX; + case kARGB_4444_SkColorType: + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + return transform_scanline_444; + case kPremul_SkAlphaType: + return transform_scanline_4444; + default: + SkASSERT(false); + return nullptr; + } + case kGray_8_SkColorType: + return transform_scanline_memcpy; + + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + case kUnpremul_SkAlphaType: + return transform_scanline_F16; + case kPremul_SkAlphaType: + return transform_scanline_F16_premul; + default: + SkASSERT(false); + return nullptr; + } + case kRGBA_F32_SkColorType: + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + case kUnpremul_SkAlphaType: + return transform_scanline_F32; + case kPremul_SkAlphaType: + return transform_scanline_F32_premul; + default: + SkASSERT(false); + return nullptr; + } + case kRGBA_1010102_SkColorType: + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + case kUnpremul_SkAlphaType: + return transform_scanline_1010102; + case kPremul_SkAlphaType: + return transform_scanline_1010102_premul; + default: + SkASSERT(false); + return nullptr; + } + case kBGRA_1010102_SkColorType: + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + case kUnpremul_SkAlphaType: + return transform_scanline_bgra_1010102; + case kPremul_SkAlphaType: + return transform_scanline_bgra_1010102_premul; + default: + SkASSERT(false); + return nullptr; + } + case kRGB_101010x_SkColorType: return transform_scanline_101010x; + case kBGR_101010x_SkColorType: return transform_scanline_bgr_101010x; + case kBGR_101010x_XR_SkColorType: SkASSERT(false); return nullptr; + + case kAlpha_8_SkColorType: + return transform_scanline_A8_to_GrayAlpha; + case kR8G8_unorm_SkColorType: + case kR16G16_unorm_SkColorType: + case kR16G16_float_SkColorType: + case kA16_unorm_SkColorType: + case kA16_float_SkColorType: + case kR16G16B16A16_unorm_SkColorType: + case kR8_unorm_SkColorType: + return nullptr; + } + SkASSERT(false); + return nullptr; +} + +static void set_icc(png_structp png_ptr, + png_infop info_ptr, + const SkImageInfo& info, + const skcms_ICCProfile* profile, + const char* profile_description) { + sk_sp icc = icc_from_color_space(info, profile, profile_description); + if (!icc) { + return; + } + +#if PNG_LIBPNG_VER_MAJOR > 1 || (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 5) + const char* name = "Skia"; + png_const_bytep iccPtr = icc->bytes(); +#else + SkString str("Skia"); + char* name = str.data(); + png_charp iccPtr = (png_charp) icc->writable_data(); +#endif + png_set_iCCP(png_ptr, info_ptr, name, 0, iccPtr, icc->size()); +} + +bool SkPngEncoderMgr::setColorSpace(const SkImageInfo& info, const SkPngEncoder::Options& options) { + if (setjmp(png_jmpbuf(fPngPtr))) { + return false; + } + + if (info.colorSpace() && info.colorSpace()->isSRGB()) { + png_set_sRGB(fPngPtr, fInfoPtr, PNG_sRGB_INTENT_PERCEPTUAL); + } else { + set_icc(fPngPtr, fInfoPtr, info, options.fICCProfile, options.fICCProfileDescription); + } + + return true; +} + +bool SkPngEncoderMgr::writeInfo(const SkImageInfo& srcInfo) { + if (setjmp(png_jmpbuf(fPngPtr))) { + return false; + } + + png_write_info(fPngPtr, fInfoPtr); + if (kRGBA_F16_SkColorType == srcInfo.colorType() && + kOpaque_SkAlphaType == srcInfo.alphaType()) + { + // For kOpaque, kRGBA_F16, we will keep the row as RGBA and tell libpng + // to skip the alpha channel. + png_set_filler(fPngPtr, 0, PNG_FILLER_AFTER); + } + + return true; +} + +void SkPngEncoderMgr::chooseProc(const SkImageInfo& srcInfo) { + fProc = choose_proc(srcInfo); +} + +std::unique_ptr SkPngEncoder::Make(SkWStream* dst, const SkPixmap& src, + const Options& options) { + if (!SkPixmapIsValid(src)) { + return nullptr; + } + + std::unique_ptr encoderMgr = SkPngEncoderMgr::Make(dst); + if (!encoderMgr) { + return nullptr; + } + + if (!encoderMgr->setHeader(src.info(), options)) { + return nullptr; + } + + if (!encoderMgr->setColorSpace(src.info(), options)) { + return nullptr; + } + + if (!encoderMgr->writeInfo(src.info())) { + return nullptr; + } + + encoderMgr->chooseProc(src.info()); + + return std::unique_ptr(new SkPngEncoder(std::move(encoderMgr), src)); +} + +SkPngEncoder::SkPngEncoder(std::unique_ptr encoderMgr, const SkPixmap& src) + : INHERITED(src, encoderMgr->pngBytesPerPixel() * src.width()) + , fEncoderMgr(std::move(encoderMgr)) +{} + +SkPngEncoder::~SkPngEncoder() {} + +bool SkPngEncoder::onEncodeRows(int numRows) { + if (setjmp(png_jmpbuf(fEncoderMgr->pngPtr()))) { + return false; + } + + const void* srcRow = fSrc.addr(0, fCurrRow); + for (int y = 0; y < numRows; y++) { + sk_msan_assert_initialized(srcRow, + (const uint8_t*)srcRow + (fSrc.width() << fSrc.shiftPerPixel())); + fEncoderMgr->proc()((char*)fStorage.get(), + (const char*)srcRow, + fSrc.width(), + SkColorTypeBytesPerPixel(fSrc.colorType())); + + png_bytep rowPtr = (png_bytep) fStorage.get(); + png_write_rows(fEncoderMgr->pngPtr(), &rowPtr, 1); + srcRow = SkTAddOffset(srcRow, fSrc.rowBytes()); + } + + fCurrRow += numRows; + if (fCurrRow == fSrc.height()) { + png_write_end(fEncoderMgr->pngPtr(), fEncoderMgr->infoPtr()); + } + + return true; +} + +bool SkPngEncoder::Encode(SkWStream* dst, const SkPixmap& src, const Options& options) { + auto encoder = SkPngEncoder::Make(dst, src, options); + return encoder.get() && encoder->encodeRows(src.height()); +} + +#endif diff --git a/gfx/skia/skia/src/encode/SkWebpEncoder.cpp b/gfx/skia/skia/src/encode/SkWebpEncoder.cpp new file mode 100644 index 0000000000..2189b807a4 --- /dev/null +++ b/gfx/skia/skia/src/encode/SkWebpEncoder.cpp @@ -0,0 +1,249 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#ifdef SK_ENCODE_WEBP + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSpan.h" +#include "include/core/SkStream.h" +#include "include/encode/SkEncoder.h" +#include "include/encode/SkWebpEncoder.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/encode/SkImageEncoderFns.h" +#include "src/encode/SkImageEncoderPriv.h" + +#include +#include +#include + +// A WebP encoder only, on top of (subset of) libwebp +// For more information on WebP image format, and libwebp library, see: +// http://code.google.com/speed/webp/ +// http://www.webmproject.org/code/#libwebp_webp_image_decoder_library +// http://review.webmproject.org/gitweb?p=libwebp.git + +extern "C" { +// If moving libwebp out of skia source tree, path for webp headers must be +// updated accordingly. Here, we enforce using local copy in webp sub-directory. +#include "webp/encode.h" +#include "webp/mux.h" +#include "webp/mux_types.h" +} + +static int stream_writer(const uint8_t* data, size_t data_size, + const WebPPicture* const picture) { + SkWStream* const stream = (SkWStream*)picture->custom_ptr; + return stream->write(data, data_size) ? 1 : 0; +} + +using WebPPictureImportProc = int (*) (WebPPicture* picture, const uint8_t* pixels, int stride); + +static bool preprocess_webp_picture(WebPPicture* pic, + WebPConfig* webp_config, + const SkPixmap& pixmap, + const SkWebpEncoder::Options& opts) { + if (!SkPixmapIsValid(pixmap)) { + return false; + } + + if (SkColorTypeIsAlphaOnly(pixmap.colorType())) { + // Maintain the existing behavior of not supporting encoding alpha-only images. + // TODO: Support encoding alpha only to an image with alpha but no color? + return false; + } + + if (nullptr == pixmap.addr()) { + return false; + } + + pic->width = pixmap.width(); + pic->height = pixmap.height(); + + // Set compression, method, and pixel format. + // libwebp recommends using BGRA for lossless and YUV for lossy. + // The choices of |webp_config.method| currently just match Chrome's defaults. We + // could potentially expose this decision to the client. + if (SkWebpEncoder::Compression::kLossy == opts.fCompression) { + webp_config->lossless = 0; +#ifndef SK_WEBP_ENCODER_USE_DEFAULT_METHOD + webp_config->method = 3; +#endif + pic->use_argb = 0; + } else { + webp_config->lossless = 1; + webp_config->method = 0; + pic->use_argb = 1; + } + + { + const SkColorType ct = pixmap.colorType(); + const bool premul = pixmap.alphaType() == kPremul_SkAlphaType; + + SkBitmap tmpBm; + WebPPictureImportProc importProc = nullptr; + const SkPixmap* src = &pixmap; + if (ct == kRGB_888x_SkColorType) { + importProc = WebPPictureImportRGBX; + } else if (!premul && ct == kRGBA_8888_SkColorType) { + importProc = WebPPictureImportRGBA; + } +#ifdef WebPPictureImportBGRA + else if (!premul && ct == kBGRA_8888_SkColorType) { + importProc = WebPPictureImportBGRA; + } +#endif + else { + importProc = WebPPictureImportRGBA; + auto info = pixmap.info() + .makeColorType(kRGBA_8888_SkColorType) + .makeAlphaType(kUnpremul_SkAlphaType); + if (!tmpBm.tryAllocPixels(info) || + !pixmap.readPixels(tmpBm.info(), tmpBm.getPixels(), tmpBm.rowBytes())) { + return false; + } + src = &tmpBm.pixmap(); + } + + if (!importProc(pic, reinterpret_cast(src->addr()), src->rowBytes())) { + return false; + } + } + + return true; +} + +bool SkWebpEncoder::Encode(SkWStream* stream, const SkPixmap& pixmap, const Options& opts) { + if (!stream) { + return false; + } + + WebPConfig webp_config; + if (!WebPConfigPreset(&webp_config, WEBP_PRESET_DEFAULT, opts.fQuality)) { + return false; + } + + WebPPicture pic; + WebPPictureInit(&pic); + SkAutoTCallVProc autoPic(&pic); + + if (!preprocess_webp_picture(&pic, &webp_config, pixmap, opts)) { + return false; + } + + // If there is no need to embed an ICC profile, we write directly to the input stream. + // Otherwise, we will first encode to |tmp| and use a mux to add the ICC chunk. libwebp + // forces us to have an encoded image before we can add a profile. + sk_sp icc = + icc_from_color_space(pixmap.info(), opts.fICCProfile, opts.fICCProfileDescription); + SkDynamicMemoryWStream tmp; + pic.custom_ptr = icc ? (void*)&tmp : (void*)stream; + pic.writer = stream_writer; + + if (!WebPEncode(&webp_config, &pic)) { + return false; + } + + if (icc) { + sk_sp encodedData = tmp.detachAsData(); + WebPData encoded = { encodedData->bytes(), encodedData->size() }; + WebPData iccChunk = { icc->bytes(), icc->size() }; + + SkAutoTCallVProc mux(WebPMuxNew()); + if (WEBP_MUX_OK != WebPMuxSetImage(mux, &encoded, 0)) { + return false; + } + + if (WEBP_MUX_OK != WebPMuxSetChunk(mux, "ICCP", &iccChunk, 0)) { + return false; + } + + WebPData assembled; + if (WEBP_MUX_OK != WebPMuxAssemble(mux, &assembled)) { + return false; + } + + stream->write(assembled.bytes, assembled.size); + WebPDataClear(&assembled); + } + + return true; +} + +bool SkWebpEncoder::EncodeAnimated(SkWStream* stream, + SkSpan frames, + const Options& opts) { + if (!stream || !frames.size()) { + return false; + } + + const int canvasWidth = frames.front().pixmap.width(); + const int canvasHeight = frames.front().pixmap.height(); + int timestamp = 0; + + std::unique_ptr enc( + WebPAnimEncoderNew(canvasWidth, canvasHeight, nullptr), WebPAnimEncoderDelete); + if (!enc) { + return false; + } + + for (const auto& frame : frames) { + const auto& pixmap = frame.pixmap; + + if (pixmap.width() != canvasWidth || pixmap.height() != canvasHeight) { + return false; + } + + WebPConfig webp_config; + if (!WebPConfigPreset(&webp_config, WEBP_PRESET_DEFAULT, opts.fQuality)) { + return false; + } + + WebPPicture pic; + WebPPictureInit(&pic); + SkAutoTCallVProc autoPic(&pic); + + if (!preprocess_webp_picture(&pic, &webp_config, pixmap, opts)) { + return false; + } + + if (!WebPEncode(&webp_config, &pic)) { + return false; + } + + if (!WebPAnimEncoderAdd(enc.get(), &pic, timestamp, &webp_config)) { + return false; + } + + timestamp += frame.duration; + } + + // Add a last fake frame to signal the last duration. + if (!WebPAnimEncoderAdd(enc.get(), nullptr, timestamp, nullptr)) { + return false; + } + + WebPData assembled; + SkAutoTCallVProc autoWebPData(&assembled); + if (!WebPAnimEncoderAssemble(enc.get(), &assembled)) { + return false; + } + + enc.reset(); + + return stream->write(assembled.bytes, assembled.size); +} + +#endif diff --git a/gfx/skia/skia/src/fonts/SkFontMgr_indirect.cpp b/gfx/skia/skia/src/fonts/SkFontMgr_indirect.cpp new file mode 100644 index 0000000000..98c9663684 --- /dev/null +++ b/gfx/skia/skia/src/fonts/SkFontMgr_indirect.cpp @@ -0,0 +1,185 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" +#include "include/ports/SkFontMgr_indirect.h" +#include "include/ports/SkRemotableFontMgr.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTemplates.h" + +class SkData; + +class SkStyleSet_Indirect : public SkFontStyleSet { +public: + /** Takes ownership of the SkRemotableFontIdentitySet. */ + SkStyleSet_Indirect(const SkFontMgr_Indirect* owner, int familyIndex, + SkRemotableFontIdentitySet* data) + : fOwner(SkRef(owner)), fFamilyIndex(familyIndex), fData(data) + { } + + int count() override { return fData->count(); } + + void getStyle(int index, SkFontStyle* fs, SkString* style) override { + if (fs) { + *fs = fData->at(index).fFontStyle; + } + if (style) { + // TODO: is this useful? Current locale? + style->reset(); + } + } + + SkTypeface* createTypeface(int index) override { + return fOwner->createTypefaceFromFontId(fData->at(index)); + } + + SkTypeface* matchStyle(const SkFontStyle& pattern) override { + if (fFamilyIndex >= 0) { + SkFontIdentity id = fOwner->fProxy->matchIndexStyle(fFamilyIndex, pattern); + return fOwner->createTypefaceFromFontId(id); + } + + return this->matchStyleCSS3(pattern); + } +private: + sk_sp fOwner; + int fFamilyIndex; + sk_sp fData; +}; + +int SkFontMgr_Indirect::onCountFamilies() const { + return 0; +} + +void SkFontMgr_Indirect::onGetFamilyName(int index, SkString* familyName) const { + SK_ABORT("Not implemented"); +} + +SkFontStyleSet* SkFontMgr_Indirect::onCreateStyleSet(int index) const { + SK_ABORT("Not implemented"); +} + +SkFontStyleSet* SkFontMgr_Indirect::onMatchFamily(const char familyName[]) const { + return new SkStyleSet_Indirect(this, -1, fProxy->matchName(familyName)); +} + +SkTypeface* SkFontMgr_Indirect::createTypefaceFromFontId(const SkFontIdentity& id) const { + if (id.fDataId == SkFontIdentity::kInvalidDataId) { + return nullptr; + } + + SkAutoMutexExclusive ama(fDataCacheMutex); + + sk_sp dataTypeface; + int dataTypefaceIndex = 0; + for (int i = 0; i < fDataCache.size(); ++i) { + const DataEntry& entry = fDataCache[i]; + if (entry.fDataId == id.fDataId) { + if (entry.fTtcIndex == id.fTtcIndex && + !entry.fTypeface->weak_expired() && entry.fTypeface->try_ref()) + { + return entry.fTypeface; + } + if (dataTypeface.get() == nullptr && + !entry.fTypeface->weak_expired() && entry.fTypeface->try_ref()) + { + dataTypeface.reset(entry.fTypeface); + dataTypefaceIndex = entry.fTtcIndex; + } + } + + if (entry.fTypeface->weak_expired()) { + fDataCache.removeShuffle(i); + --i; + } + } + + // No exact match, but did find a data match. + if (dataTypeface.get() != nullptr) { + std::unique_ptr stream(dataTypeface->openStream(nullptr)); + if (stream.get() != nullptr) { + return fImpl->makeFromStream(std::move(stream), dataTypefaceIndex).release(); + } + } + + // No data match, request data and add entry. + std::unique_ptr stream(fProxy->getData(id.fDataId)); + if (stream.get() == nullptr) { + return nullptr; + } + + sk_sp typeface(fImpl->makeFromStream(std::move(stream), id.fTtcIndex)); + if (typeface.get() == nullptr) { + return nullptr; + } + + DataEntry& newEntry = fDataCache.push_back(); + typeface->weak_ref(); + newEntry.fDataId = id.fDataId; + newEntry.fTtcIndex = id.fTtcIndex; + newEntry.fTypeface = typeface.get(); // weak reference passed to new entry. + + return typeface.release(); +} + +SkTypeface* SkFontMgr_Indirect::onMatchFamilyStyle(const char familyName[], + const SkFontStyle& fontStyle) const { + SkFontIdentity id = fProxy->matchNameStyle(familyName, fontStyle); + return this->createTypefaceFromFontId(id); +} + +SkTypeface* SkFontMgr_Indirect::onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle& style, + const char* bcp47[], + int bcp47Count, + SkUnichar character) const { + SkFontIdentity id = fProxy->matchNameStyleCharacter(familyName, style, bcp47, + bcp47Count, character); + return this->createTypefaceFromFontId(id); +} + +sk_sp SkFontMgr_Indirect::onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const { + return fImpl->makeFromStream(std::move(stream), ttcIndex); +} + +sk_sp SkFontMgr_Indirect::onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const { + return fImpl->makeFromStream(std::move(stream), args); +} + +sk_sp SkFontMgr_Indirect::onMakeFromFile(const char path[], int ttcIndex) const { + return fImpl->makeFromFile(path, ttcIndex); +} + +sk_sp SkFontMgr_Indirect::onMakeFromData(sk_sp data, int ttcIndex) const { + return fImpl->makeFromData(std::move(data), ttcIndex); +} + +sk_sp SkFontMgr_Indirect::onLegacyMakeTypeface(const char familyName[], + SkFontStyle style) const { + sk_sp face(this->matchFamilyStyle(familyName, style)); + + if (nullptr == face.get()) { + face.reset(this->matchFamilyStyle(nullptr, style)); + } + + if (nullptr == face.get()) { + SkFontIdentity fontId = this->fProxy->matchIndexStyle(0, style); + face.reset(this->createTypefaceFromFontId(fontId)); + } + + return face; +} diff --git a/gfx/skia/skia/src/fonts/SkRemotableFontMgr.cpp b/gfx/skia/skia/src/fonts/SkRemotableFontMgr.cpp new file mode 100644 index 0000000000..d8c904a566 --- /dev/null +++ b/gfx/skia/skia/src/fonts/SkRemotableFontMgr.cpp @@ -0,0 +1,23 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/ports/SkRemotableFontMgr.h" +#include "include/private/base/SkOnce.h" + +SkRemotableFontIdentitySet::SkRemotableFontIdentitySet(int count, SkFontIdentity** data) + : fCount(count), fData(count) +{ + SkASSERT(data); + *data = fData.get(); +} + +SkRemotableFontIdentitySet* SkRemotableFontIdentitySet::NewEmpty() { + static SkOnce once; + static SkRemotableFontIdentitySet* empty; + once([]{ empty = new SkRemotableFontIdentitySet; }); + return SkRef(empty); +} diff --git a/gfx/skia/skia/src/image/SkImage.cpp b/gfx/skia/skia/src/image/SkImage.cpp new file mode 100644 index 0000000000..6787044445 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage.cpp @@ -0,0 +1,540 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImage.h" + +#include "include/codec/SkEncodedImageFormat.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkImageEncoder.h" +#include "include/core/SkImageGenerator.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPicture.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTileMode.h" +#include "include/core/SkTypes.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkImageFilterCache.h" +#include "src/core/SkImageFilterTypes.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkMipmap.h" +#include "src/core/SkNextID.h" +#include "src/core/SkSpecialImage.h" +#include "src/image/SkImage_Base.h" +#include "src/shaders/SkImageShader.h" + +#include + +class SkShader; + +#if defined(SK_GANESH) +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/private/gpu/ganesh/GrImageContext.h" +#include "src/gpu/ganesh/GrImageContextPriv.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Image_Graphite.h" +#include "src/gpu/graphite/Log.h" +#endif + +SkImage::SkImage(const SkImageInfo& info, uint32_t uniqueID) + : fInfo(info) + , fUniqueID(kNeedNewImageUniqueID == uniqueID ? SkNextID::ImageID() : uniqueID) { + SkASSERT(info.width() > 0); + SkASSERT(info.height() > 0); +} + +bool SkImage::peekPixels(SkPixmap* pm) const { + SkPixmap tmp; + if (!pm) { + pm = &tmp; + } + return as_IB(this)->onPeekPixels(pm); +} + +bool SkImage::readPixels(GrDirectContext* dContext, const SkImageInfo& dstInfo, void* dstPixels, + size_t dstRowBytes, int srcX, int srcY, CachingHint chint) const { + return as_IB(this)->onReadPixels(dContext, dstInfo, dstPixels, dstRowBytes, srcX, srcY, chint); +} + +#ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API +bool SkImage::readPixels(const SkImageInfo& dstInfo, void* dstPixels, + size_t dstRowBytes, int srcX, int srcY, CachingHint chint) const { + auto dContext = as_IB(this)->directContext(); + return this->readPixels(dContext, dstInfo, dstPixels, dstRowBytes, srcX, srcY, chint); +} +#endif + +void SkImage::asyncRescaleAndReadPixels(const SkImageInfo& info, + const SkIRect& srcRect, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const { + if (!SkIRect::MakeWH(this->width(), this->height()).contains(srcRect) || + !SkImageInfoIsValid(info)) { + callback(context, nullptr); + return; + } + as_IB(this)->onAsyncRescaleAndReadPixels( + info, srcRect, rescaleGamma, rescaleMode, callback, context); +} + +void SkImage::asyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace, + sk_sp dstColorSpace, + const SkIRect& srcRect, + const SkISize& dstSize, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const { + if (!SkIRect::MakeWH(this->width(), this->height()).contains(srcRect) || dstSize.isZero() || + (dstSize.width() & 0b1) || (dstSize.height() & 0b1)) { + callback(context, nullptr); + return; + } + as_IB(this)->onAsyncRescaleAndReadPixelsYUV420(yuvColorSpace, + std::move(dstColorSpace), + srcRect, + dstSize, + rescaleGamma, + rescaleMode, + callback, + context); +} + +bool SkImage::scalePixels(const SkPixmap& dst, const SkSamplingOptions& sampling, + CachingHint chint) const { + // Context TODO: Elevate GrDirectContext requirement to public API. + auto dContext = as_IB(this)->directContext(); + if (this->width() == dst.width() && this->height() == dst.height()) { + return this->readPixels(dContext, dst, 0, 0, chint); + } + + // Idea: If/when SkImageGenerator supports a native-scaling API (where the generator itself + // can scale more efficiently) we should take advantage of it here. + // + SkBitmap bm; + if (as_IB(this)->getROPixels(dContext, &bm, chint)) { + SkPixmap pmap; + // Note: By calling the pixmap scaler, we never cache the final result, so the chint + // is (currently) only being applied to the getROPixels. If we get a request to + // also attempt to cache the final (scaled) result, we would add that logic here. + // + return bm.peekPixels(&pmap) && pmap.scalePixels(dst, sampling); + } + return false; +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkColorType SkImage::colorType() const { return fInfo.colorType(); } + +SkAlphaType SkImage::alphaType() const { return fInfo.alphaType(); } + +SkColorSpace* SkImage::colorSpace() const { return fInfo.colorSpace(); } + +sk_sp SkImage::refColorSpace() const { return fInfo.refColorSpace(); } + +sk_sp SkImage::makeShader(const SkSamplingOptions& sampling, const SkMatrix& lm) const { + return SkImageShader::Make(sk_ref_sp(const_cast(this)), + SkTileMode::kClamp, SkTileMode::kClamp, + sampling, &lm); +} + +sk_sp SkImage::makeShader(const SkSamplingOptions& sampling, const SkMatrix* lm) const { + return SkImageShader::Make(sk_ref_sp(const_cast(this)), + SkTileMode::kClamp, SkTileMode::kClamp, + sampling, lm); +} + +sk_sp SkImage::makeShader(SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + const SkMatrix& lm) const { + return SkImageShader::Make(sk_ref_sp(const_cast(this)), tmx, tmy, + sampling, &lm); +} + +sk_sp SkImage::makeShader(SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + const SkMatrix* localMatrix) const { + return SkImageShader::Make(sk_ref_sp(const_cast(this)), tmx, tmy, + sampling, localMatrix); +} + +sk_sp SkImage::makeRawShader(SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + const SkMatrix& lm) const { + return SkImageShader::MakeRaw(sk_ref_sp(const_cast(this)), tmx, tmy, + sampling, &lm); +} + +sk_sp SkImage::makeRawShader(const SkSamplingOptions& sampling, + const SkMatrix& lm) const { + return SkImageShader::MakeRaw(sk_ref_sp(const_cast(this)), + SkTileMode::kClamp, SkTileMode::kClamp, + sampling, &lm); +} + +sk_sp SkImage::makeRawShader(const SkSamplingOptions& sampling, + const SkMatrix* localMatrix) const { + return SkImageShader::MakeRaw(sk_ref_sp(const_cast(this)), + SkTileMode::kClamp, SkTileMode::kClamp, + sampling, localMatrix); +} + +sk_sp SkImage::makeRawShader(SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + const SkMatrix* localMatrix) const { + return SkImageShader::MakeRaw(sk_ref_sp(const_cast(this)), tmx, tmy, + sampling, localMatrix); +} + +sk_sp SkImage::encodeToData(GrDirectContext* context, SkEncodedImageFormat type, + int quality) const { + SkBitmap bm; + if (as_IB(this)->getROPixels(context, &bm)) { + return SkEncodeBitmap(bm, type, quality); + } + return nullptr; +} + +sk_sp SkImage::encodeToData(GrDirectContext* context) const { + if (auto encoded = this->refEncodedData()) { + return encoded; + } + + return this->encodeToData(context, SkEncodedImageFormat::kPNG, 100); +} + +#ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API +sk_sp SkImage::encodeToData(SkEncodedImageFormat type, int quality) const { + auto dContext = as_IB(this)->directContext(); + return this->encodeToData(dContext, type, quality); +} + +sk_sp SkImage::encodeToData() const { + auto dContext = as_IB(this)->directContext(); + return this->encodeToData(dContext); +} +#endif + +sk_sp SkImage::refEncodedData() const { + return sk_sp(as_IB(this)->onRefEncoded()); +} + +sk_sp SkImage::MakeFromEncoded(sk_sp encoded, + std::optional alphaType) { + if (nullptr == encoded || 0 == encoded->size()) { + return nullptr; + } + return SkImage::MakeFromGenerator( + SkImageGenerator::MakeFromEncoded(std::move(encoded), alphaType)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImage::makeSubset(const SkIRect& subset, GrDirectContext* direct) const { + if (subset.isEmpty()) { + return nullptr; + } + + const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height()); + if (!bounds.contains(subset)) { + return nullptr; + } + +#if defined(SK_GANESH) + auto myContext = as_IB(this)->context(); + // This check is also performed in the subclass, but we do it here for the short-circuit below. + if (myContext && !myContext->priv().matches(direct)) { + return nullptr; + } +#endif + + // optimization : return self if the subset == our bounds + if (bounds == subset) { + return sk_ref_sp(const_cast(this)); + } + + return as_IB(this)->onMakeSubset(subset, direct); +} + +#if defined(SK_GANESH) + +bool SkImage::isTextureBacked() const { + return as_IB(this)->isGaneshBacked() || as_IB(this)->isGraphiteBacked(); +} + +size_t SkImage::textureSize() const { return as_IB(this)->onTextureSize(); } + +GrBackendTexture SkImage::getBackendTexture(bool flushPendingGrContextIO, + GrSurfaceOrigin* origin) const { + return as_IB(this)->onGetBackendTexture(flushPendingGrContextIO, origin); +} + +bool SkImage::isValid(GrRecordingContext* rContext) const { + if (rContext && rContext->abandoned()) { + return false; + } + return as_IB(this)->onIsValid(rContext); +} + +GrSemaphoresSubmitted SkImage::flush(GrDirectContext* dContext, + const GrFlushInfo& flushInfo) const { + return as_IB(this)->onFlush(dContext, flushInfo); +} + +void SkImage::flushAndSubmit(GrDirectContext* dContext) const { + this->flush(dContext, {}); + dContext->submit(); +} + +#else + +bool SkImage::isTextureBacked() const { return false; } + +bool SkImage::isValid(GrRecordingContext* rContext) const { + if (rContext) { + return false; + } + return as_IB(this)->onIsValid(nullptr); +} + +#endif + +bool SkImage::readPixels(GrDirectContext* dContext, const SkPixmap& pmap, int srcX, int srcY, + CachingHint chint) const { + return this->readPixels(dContext, pmap.info(), pmap.writable_addr(), pmap.rowBytes(), srcX, + srcY, chint); +} + +#ifndef SK_IMAGE_READ_PIXELS_DISABLE_LEGACY_API +bool SkImage::readPixels(const SkPixmap& pmap, int srcX, int srcY, CachingHint chint) const { + auto dContext = as_IB(this)->directContext(); + return this->readPixels(dContext, pmap, srcX, srcY, chint); +} +#endif + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImage::MakeFromBitmap(const SkBitmap& bm) { + if (!bm.pixelRef()) { + return nullptr; + } + + return SkMakeImageFromRasterBitmap(bm, kIfMutable_SkCopyPixelsMode); +} + +bool SkImage::asLegacyBitmap(SkBitmap* bitmap, LegacyBitmapMode ) const { + // Context TODO: Elevate GrDirectContext requirement to public API. + auto dContext = as_IB(this)->directContext(); + return as_IB(this)->onAsLegacyBitmap(dContext, bitmap); +} + +sk_sp SkImage::MakeFromPicture(sk_sp picture, const SkISize& dimensions, + const SkMatrix* matrix, const SkPaint* paint, + BitDepth bitDepth, sk_sp colorSpace) { + return SkImage::MakeFromPicture(picture, dimensions, matrix, paint, bitDepth, colorSpace, {}); +} + +sk_sp SkImage::MakeFromPicture(sk_sp picture, const SkISize& dimensions, + const SkMatrix* matrix, const SkPaint* paint, + BitDepth bitDepth, sk_sp colorSpace, + SkSurfaceProps props) { + return MakeFromGenerator(SkImageGenerator::MakeFromPicture(dimensions, std::move(picture), + matrix, paint, bitDepth, + std::move(colorSpace), props)); +} + +sk_sp SkImage::makeWithFilter(GrRecordingContext* rContext, const SkImageFilter* filter, + const SkIRect& subset, const SkIRect& clipBounds, + SkIRect* outSubset, SkIPoint* offset) const { + + if (!filter || !outSubset || !offset || !this->bounds().contains(subset)) { + return nullptr; + } + sk_sp srcSpecialImage; +#if defined(SK_GANESH) + auto myContext = as_IB(this)->context(); + if (myContext && !myContext->priv().matches(rContext)) { + return nullptr; + } + srcSpecialImage = SkSpecialImage::MakeFromImage(rContext, subset, + sk_ref_sp(const_cast(this)), + SkSurfaceProps()); +#else + srcSpecialImage = SkSpecialImage::MakeFromImage(nullptr, subset, + sk_ref_sp(const_cast(this)), + SkSurfaceProps()); +#endif + if (!srcSpecialImage) { + return nullptr; + } + + sk_sp cache( + SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize)); + + // The filters operate in the local space of the src image, where (0,0) corresponds to the + // subset's top left corner. But the clip bounds and any crop rects on the filters are in the + // original coordinate system, so configure the CTM to correct crop rects and explicitly adjust + // the clip bounds (since it is assumed to already be in image space). + SkImageFilter_Base::Context context(SkMatrix::Translate(-subset.x(), -subset.y()), + clipBounds.makeOffset(-subset.topLeft()), + cache.get(), fInfo.colorType(), fInfo.colorSpace(), + srcSpecialImage.get()); + + sk_sp result = as_IFB(filter)->filterImage(context).imageAndOffset(offset); + if (!result) { + return nullptr; + } + + // The output image and offset are relative to the subset rectangle, so the offset needs to + // be shifted to put it in the correct spot with respect to the original coordinate system + offset->fX += subset.x(); + offset->fY += subset.y(); + + // Final clip against the exact clipBounds (the clip provided in the context gets adjusted + // to account for pixel-moving filters so doesn't always exactly match when finished). The + // clipBounds are translated into the clippedDstRect coordinate space, including the + // result->subset() ensures that the result's image pixel origin does not affect results. + SkIRect dstRect = result->subset(); + SkIRect clippedDstRect = dstRect; + if (!clippedDstRect.intersect(clipBounds.makeOffset(result->subset().topLeft() - *offset))) { + return nullptr; + } + + // Adjust the geometric offset if the top-left corner moved as well + offset->fX += (clippedDstRect.x() - dstRect.x()); + offset->fY += (clippedDstRect.y() - dstRect.y()); + *outSubset = clippedDstRect; + return result->asImage(); +} + +bool SkImage::isLazyGenerated() const { + return as_IB(this)->onIsLazyGenerated(); +} + +bool SkImage::isAlphaOnly() const { return SkColorTypeIsAlphaOnly(fInfo.colorType()); } + +sk_sp SkImage::makeColorSpace(sk_sp target, GrDirectContext* direct) const { + return this->makeColorTypeAndColorSpace(this->colorType(), std::move(target), direct); +} + +sk_sp SkImage::makeColorTypeAndColorSpace(SkColorType targetColorType, + sk_sp targetColorSpace, + GrDirectContext* dContext) const { + if (kUnknown_SkColorType == targetColorType || !targetColorSpace) { + return nullptr; + } + +#if defined(SK_GANESH) + auto myContext = as_IB(this)->context(); + // This check is also performed in the subclass, but we do it here for the short-circuit below. + if (myContext && !myContext->priv().matches(dContext)) { + return nullptr; + } +#endif + + SkColorType colorType = this->colorType(); + SkColorSpace* colorSpace = this->colorSpace(); + if (!colorSpace) { + colorSpace = sk_srgb_singleton(); + } + if (colorType == targetColorType && + (SkColorSpace::Equals(colorSpace, targetColorSpace.get()) || this->isAlphaOnly())) { + return sk_ref_sp(const_cast(this)); + } + + return as_IB(this)->onMakeColorTypeAndColorSpace(targetColorType, + std::move(targetColorSpace), dContext); +} + +sk_sp SkImage::reinterpretColorSpace(sk_sp target) const { + if (!target) { + return nullptr; + } + + // No need to create a new image if: + // (1) The color spaces are equal. + // (2) The color type is kAlpha8. + SkColorSpace* colorSpace = this->colorSpace(); + if (!colorSpace) { + colorSpace = sk_srgb_singleton(); + } + if (SkColorSpace::Equals(colorSpace, target.get()) || this->isAlphaOnly()) { + return sk_ref_sp(const_cast(this)); + } + + return as_IB(this)->onReinterpretColorSpace(std::move(target)); +} + +sk_sp SkImage::makeNonTextureImage() const { + if (!this->isTextureBacked()) { + return sk_ref_sp(const_cast(this)); + } + return this->makeRasterImage(); +} + +sk_sp SkImage::makeRasterImage(CachingHint chint) const { + SkPixmap pm; + if (this->peekPixels(&pm)) { + return sk_ref_sp(const_cast(this)); + } + + const size_t rowBytes = fInfo.minRowBytes(); + size_t size = fInfo.computeByteSize(rowBytes); + if (SkImageInfo::ByteSizeOverflowed(size)) { + return nullptr; + } + + // Context TODO: Elevate GrDirectContext requirement to public API. + auto dContext = as_IB(this)->directContext(); + sk_sp data = SkData::MakeUninitialized(size); + pm = {fInfo.makeColorSpace(nullptr), data->writable_data(), fInfo.minRowBytes()}; + if (!this->readPixels(dContext, pm, 0, 0, chint)) { + return nullptr; + } + + return SkImage::MakeRasterData(fInfo, std::move(data), rowBytes); +} + +bool SkImage_pinAsTexture(const SkImage* image, GrRecordingContext* rContext) { + SkASSERT(image); + SkASSERT(rContext); + return as_IB(image)->onPinAsTexture(rContext); +} + +void SkImage_unpinAsTexture(const SkImage* image, GrRecordingContext* rContext) { + SkASSERT(image); + SkASSERT(rContext); + as_IB(image)->onUnpinAsTexture(rContext); +} + +bool SkImage::hasMipmaps() const { return as_IB(this)->onHasMipmaps(); } + +sk_sp SkImage::withMipmaps(sk_sp mips) const { + if (mips == nullptr || mips->validForRootLevel(this->imageInfo())) { + if (auto result = as_IB(this)->onMakeWithMipmaps(std::move(mips))) { + return result; + } + } + return sk_ref_sp((const_cast(this))); +} + +sk_sp SkImage::withDefaultMipmaps() const { + return this->withMipmaps(nullptr); +} diff --git a/gfx/skia/skia/src/image/SkImage_AndroidFactories.cpp b/gfx/skia/skia/src/image/SkImage_AndroidFactories.cpp new file mode 100644 index 0000000000..9a03a0ae20 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_AndroidFactories.cpp @@ -0,0 +1,201 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 + +#include "include/android/SkImageAndroid.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageGenerator.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkSize.h" +#include "include/core/SkSurface.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrContextThreadSafeProxy.h" +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/private/base/SkAssert.h" +#include "include/private/gpu/ganesh/GrImageContext.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkAutoPixmapStorage.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/gpu/RefCntedCallback.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrAHardwareBufferImageGenerator.h" +#include "src/gpu/ganesh/GrAHardwareBufferUtils_impl.h" +#include "src/gpu/ganesh/GrBackendTextureImageGenerator.h" +#include "src/gpu/ganesh/GrBackendUtils.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrContextThreadSafeProxyPriv.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrGpu.h" +#include "src/gpu/ganesh/GrGpuResourcePriv.h" +#include "src/gpu/ganesh/GrImageContextPriv.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrRenderTask.h" +#include "src/gpu/ganesh/GrSemaphore.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrTexture.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/SurfaceContext.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/image/SkImage_Base.h" +#include "src/image/SkImage_Gpu.h" + +#include +#include +#include + +namespace sk_image_factory { + +sk_sp MakeFromAHardwareBuffer(AHardwareBuffer* graphicBuffer, SkAlphaType at) { + auto gen = GrAHardwareBufferImageGenerator::Make(graphicBuffer, at, nullptr, + kTopLeft_GrSurfaceOrigin); + return SkImage::MakeFromGenerator(std::move(gen)); +} + +sk_sp MakeFromAHardwareBuffer(AHardwareBuffer* graphicBuffer, SkAlphaType at, + sk_sp cs, + GrSurfaceOrigin surfaceOrigin) { + auto gen = GrAHardwareBufferImageGenerator::Make(graphicBuffer, at, cs, surfaceOrigin); + return SkImage::MakeFromGenerator(std::move(gen)); +} + +sk_sp MakeFromAHardwareBufferWithData(GrDirectContext* dContext, + const SkPixmap& pixmap, + AHardwareBuffer* hardwareBuffer, + GrSurfaceOrigin surfaceOrigin) { + AHardwareBuffer_Desc bufferDesc; + AHardwareBuffer_describe(hardwareBuffer, &bufferDesc); + + if (!SkToBool(bufferDesc.usage & AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE)) { + return nullptr; + } + + + GrBackendFormat backendFormat = GrAHardwareBufferUtils::GetBackendFormat(dContext, + hardwareBuffer, + bufferDesc.format, + true); + + if (!backendFormat.isValid()) { + return nullptr; + } + + GrAHardwareBufferUtils::DeleteImageProc deleteImageProc = nullptr; + GrAHardwareBufferUtils::UpdateImageProc updateImageProc = nullptr; + GrAHardwareBufferUtils::TexImageCtx deleteImageCtx = nullptr; + + const bool isRenderable = SkToBool(bufferDesc.usage & AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER); + + GrBackendTexture backendTexture = + GrAHardwareBufferUtils::MakeBackendTexture(dContext, hardwareBuffer, + bufferDesc.width, bufferDesc.height, + &deleteImageProc, &updateImageProc, + &deleteImageCtx, false, backendFormat, + isRenderable); + if (!backendTexture.isValid()) { + return nullptr; + } + SkASSERT(deleteImageProc); + + auto releaseHelper = skgpu::RefCntedCallback::Make(deleteImageProc, deleteImageCtx); + + SkColorType colorType = + GrAHardwareBufferUtils::GetSkColorTypeFromBufferFormat(bufferDesc.format); + + GrColorType grColorType = SkColorTypeToGrColorType(colorType); + + GrProxyProvider* proxyProvider = dContext->priv().proxyProvider(); + if (!proxyProvider) { + return nullptr; + } + + sk_sp proxy = proxyProvider->wrapBackendTexture( + backendTexture, kBorrow_GrWrapOwnership, GrWrapCacheable::kNo, kRW_GrIOType, + std::move(releaseHelper)); + if (!proxy) { + return nullptr; + } + + skgpu::Swizzle swizzle = dContext->priv().caps()->getReadSwizzle(backendFormat, grColorType); + GrSurfaceProxyView framebufferView(std::move(proxy), surfaceOrigin, swizzle); + SkColorInfo colorInfo = pixmap.info().colorInfo().makeColorType(colorType); + sk_sp image = sk_make_sp(sk_ref_sp(dContext), + kNeedNewImageUniqueID, + framebufferView, + std::move(colorInfo)); + if (!image) { + return nullptr; + } + + GrDrawingManager* drawingManager = dContext->priv().drawingManager(); + if (!drawingManager) { + return nullptr; + } + + skgpu::ganesh::SurfaceContext surfaceContext( + dContext, std::move(framebufferView), image->imageInfo().colorInfo()); + + surfaceContext.writePixels(dContext, pixmap, {0, 0}); + + GrSurfaceProxy* p[1] = {surfaceContext.asSurfaceProxy()}; + drawingManager->flush(p, SkSurface::BackendSurfaceAccess::kNoAccess, {}, nullptr); + + return image; +} + +} // namespace sk_image_factory + +#if !defined(SK_DISABLE_LEGACY_IMAGE_FACTORIES) + +sk_sp SkImage::MakeFromAHardwareBuffer( + AHardwareBuffer* hardwareBuffer, + SkAlphaType alphaType) { + return sk_image_factory::MakeFromAHardwareBuffer(hardwareBuffer, alphaType); +} + +sk_sp SkImage::MakeFromAHardwareBuffer( + AHardwareBuffer* hardwareBuffer, + SkAlphaType alphaType, + sk_sp colorSpace, + GrSurfaceOrigin surfaceOrigin) { + return sk_image_factory::MakeFromAHardwareBuffer(hardwareBuffer, alphaType, + colorSpace, surfaceOrigin); +} + +sk_sp SkImage::MakeFromAHardwareBufferWithData( + GrDirectContext* context, + const SkPixmap& pixmap, + AHardwareBuffer* hardwareBuffer, + GrSurfaceOrigin surfaceOrigin) { + return sk_image_factory::MakeFromAHardwareBufferWithData(context, + pixmap, + hardwareBuffer, + surfaceOrigin); +} + +#endif // SK_DISABLE_LEGACY_IMAGE_FACTORIES + +#endif // defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 diff --git a/gfx/skia/skia/src/image/SkImage_Base.cpp b/gfx/skia/skia/src/image/SkImage_Base.cpp new file mode 100644 index 0000000000..f8d766a64f --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Base.cpp @@ -0,0 +1,367 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkImage_Base.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkSamplingPriv.h" +#include "src/image/SkRescaleAndReadPixels.h" + +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/private/gpu/ganesh/GrImageContext.h" +#include "src/gpu/ResourceKey.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSamplerState.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/effects/GrBicubicEffect.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +enum class GrColorType; +#endif + +#if defined(SK_GRAPHITE) +#include "src/core/SkColorSpacePriv.h" +#include "src/gpu/graphite/Image_Graphite.h" +#include "src/gpu/graphite/Log.h" +#endif + +SkImage_Base::SkImage_Base(const SkImageInfo& info, uint32_t uniqueID) + : SkImage(info, uniqueID), fAddedToRasterCache(false) {} + +SkImage_Base::~SkImage_Base() { + if (fAddedToRasterCache.load()) { + SkNotifyBitmapGenIDIsStale(this->uniqueID()); + } +} + +void SkImage_Base::onAsyncRescaleAndReadPixels(const SkImageInfo& info, + SkIRect origSrcRect, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const { + SkBitmap src; + SkPixmap peek; + SkIRect srcRect; + if (this->peekPixels(&peek)) { + src.installPixels(peek); + srcRect = origSrcRect; + } else { + // Context TODO: Elevate GrDirectContext requirement to public API. + auto dContext = as_IB(this)->directContext(); + src.setInfo(this->imageInfo().makeDimensions(origSrcRect.size())); + src.allocPixels(); + if (!this->readPixels(dContext, src.pixmap(), origSrcRect.x(), origSrcRect.y())) { + callback(context, nullptr); + return; + } + srcRect = SkIRect::MakeSize(src.dimensions()); + } + return SkRescaleAndReadPixels(src, info, srcRect, rescaleGamma, rescaleMode, callback, context); +} + +void SkImage_Base::onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace, + sk_sp dstColorSpace, + SkIRect srcRect, + SkISize dstSize, + RescaleGamma, + RescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const { + // TODO: Call non-YUV asyncRescaleAndReadPixels and then make our callback convert to YUV and + // call client's callback. + callback(context, nullptr); +} + +#if defined(SK_GANESH) +std::tuple SkImage_Base::asView(GrRecordingContext* context, + GrMipmapped mipmapped, + GrImageTexGenPolicy policy) const { + if (!context) { + return {}; + } + if (!context->priv().caps()->mipmapSupport() || this->dimensions().area() <= 1) { + mipmapped = GrMipmapped::kNo; + } + return this->onAsView(context, mipmapped, policy); +} + +std::unique_ptr SkImage_Base::asFragmentProcessor( + GrRecordingContext* rContext, + SkSamplingOptions sampling, + const SkTileMode tileModes[2], + const SkMatrix& m, + const SkRect* subset, + const SkRect* domain) const { + if (!rContext) { + return {}; + } + if (sampling.useCubic && !GrValidCubicResampler(sampling.cubic)) { + return {}; + } + if (sampling.mipmap != SkMipmapMode::kNone && + (!rContext->priv().caps()->mipmapSupport() || this->dimensions().area() <= 1)) { + sampling = SkSamplingOptions(sampling.filter); + } + return this->onAsFragmentProcessor(rContext, sampling, tileModes, m, subset, domain); +} + +std::unique_ptr SkImage_Base::MakeFragmentProcessorFromView( + GrRecordingContext* rContext, + GrSurfaceProxyView view, + SkAlphaType at, + SkSamplingOptions sampling, + const SkTileMode tileModes[2], + const SkMatrix& m, + const SkRect* subset, + const SkRect* domain) { + if (!view) { + return nullptr; + } + const GrCaps& caps = *rContext->priv().caps(); + auto wmx = SkTileModeToWrapMode(tileModes[0]); + auto wmy = SkTileModeToWrapMode(tileModes[1]); + if (sampling.useCubic) { + if (subset) { + if (domain) { + return GrBicubicEffect::MakeSubset(std::move(view), + at, + m, + wmx, + wmy, + *subset, + *domain, + sampling.cubic, + GrBicubicEffect::Direction::kXY, + *rContext->priv().caps()); + } + return GrBicubicEffect::MakeSubset(std::move(view), + at, + m, + wmx, + wmy, + *subset, + sampling.cubic, + GrBicubicEffect::Direction::kXY, + *rContext->priv().caps()); + } + return GrBicubicEffect::Make(std::move(view), + at, + m, + wmx, + wmy, + sampling.cubic, + GrBicubicEffect::Direction::kXY, + *rContext->priv().caps()); + } + if (sampling.isAniso()) { + if (!rContext->priv().caps()->anisoSupport()) { + // Fallback to linear + sampling = SkSamplingPriv::AnisoFallback(view.mipmapped() == GrMipmapped::kYes); + } + } else if (view.mipmapped() == GrMipmapped::kNo) { + sampling = SkSamplingOptions(sampling.filter); + } + GrSamplerState sampler; + if (sampling.isAniso()) { + sampler = GrSamplerState::Aniso(wmx, wmy, sampling.maxAniso, view.mipmapped()); + } else { + sampler = GrSamplerState(wmx, wmy, sampling.filter, sampling.mipmap); + } + if (subset) { + if (domain) { + return GrTextureEffect::MakeSubset(std::move(view), + at, + m, + sampler, + *subset, + *domain, + caps); + } + return GrTextureEffect::MakeSubset(std::move(view), + at, + m, + sampler, + *subset, + caps); + } else { + return GrTextureEffect::Make(std::move(view), at, m, sampler, caps); + } +} + +GrSurfaceProxyView SkImage_Base::FindOrMakeCachedMipmappedView(GrRecordingContext* rContext, + GrSurfaceProxyView view, + uint32_t imageUniqueID) { + SkASSERT(rContext); + SkASSERT(imageUniqueID != SK_InvalidUniqueID); + + if (!view || view.proxy()->asTextureProxy()->mipmapped() == GrMipmapped::kYes) { + return view; + } + GrProxyProvider* proxyProvider = rContext->priv().proxyProvider(); + + skgpu::UniqueKey baseKey; + GrMakeKeyFromImageID(&baseKey, imageUniqueID, SkIRect::MakeSize(view.dimensions())); + SkASSERT(baseKey.isValid()); + skgpu::UniqueKey mipmappedKey; + static const skgpu::UniqueKey::Domain kMipmappedDomain = skgpu::UniqueKey::GenerateDomain(); + { // No extra values beyond the domain are required. Must name the var to please + // clang-tidy. + skgpu::UniqueKey::Builder b(&mipmappedKey, baseKey, kMipmappedDomain, 0); + } + SkASSERT(mipmappedKey.isValid()); + if (sk_sp cachedMippedView = + proxyProvider->findOrCreateProxyByUniqueKey(mipmappedKey)) { + return {std::move(cachedMippedView), view.origin(), view.swizzle()}; + } + + auto copy = GrCopyBaseMipMapToView(rContext, view); + if (!copy) { + return view; + } + // TODO: If we move listeners up from SkImage_Lazy to SkImage_Base then add one here. + proxyProvider->assignUniqueKeyToProxy(mipmappedKey, copy.asTextureProxy()); + return copy; +} + +GrBackendTexture SkImage_Base::onGetBackendTexture(bool flushPendingGrContextIO, + GrSurfaceOrigin* origin) const { + return GrBackendTexture(); // invalid +} + +GrSurfaceProxyView SkImage_Base::CopyView(GrRecordingContext* context, + GrSurfaceProxyView src, + GrMipmapped mipmapped, + GrImageTexGenPolicy policy, + std::string_view label) { + skgpu::Budgeted budgeted = policy == GrImageTexGenPolicy::kNew_Uncached_Budgeted + ? skgpu::Budgeted::kYes + : skgpu::Budgeted::kNo; + return GrSurfaceProxyView::Copy(context, + std::move(src), + mipmapped, + SkBackingFit::kExact, + budgeted, + /*label=*/label); +} + +#endif // defined(SK_GANESH) + +#if defined(SK_GRAPHITE) +std::tuple SkImage_Base::asView( + skgpu::graphite::Recorder* recorder, + skgpu::Mipmapped mipmapped) const { + if (!recorder) { + return {}; + } + + if (!as_IB(this)->isGraphiteBacked()) { + return {}; + } + // TODO(b/238756380): YUVA not supported yet + if (as_IB(this)->isYUVA()) { + return {}; + } + + auto image = reinterpret_cast(this); + + if (this->dimensions().area() <= 1) { + mipmapped = skgpu::Mipmapped::kNo; + } + + if (mipmapped == skgpu::Mipmapped::kYes && + image->textureProxyView().proxy()->mipmapped() != skgpu::Mipmapped::kYes) { + SKGPU_LOG_W("Graphite does not auto-generate mipmap levels"); + return {}; + } + + SkColorType ct = this->colorType(); + return { image->textureProxyView(), ct }; +} + +sk_sp SkImage::makeColorSpace(sk_sp targetColorSpace, + skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProps) const { + return this->makeColorTypeAndColorSpace(this->colorType(), std::move(targetColorSpace), + recorder, requiredProps); +} + +sk_sp SkImage::makeColorTypeAndColorSpace(SkColorType targetColorType, + sk_sp targetColorSpace, + skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProps) const { + if (kUnknown_SkColorType == targetColorType || !targetColorSpace) { + return nullptr; + } + + SkColorType colorType = this->colorType(); + SkColorSpace* colorSpace = this->colorSpace(); + if (!colorSpace) { + colorSpace = sk_srgb_singleton(); + } + if (colorType == targetColorType && + (SkColorSpace::Equals(colorSpace, targetColorSpace.get()) || this->isAlphaOnly())) { + return sk_ref_sp(const_cast(this)); + } + + return as_IB(this)->onMakeColorTypeAndColorSpace(targetColorType, + std::move(targetColorSpace), + recorder, + requiredProps); +} + +#endif // SK_GRAPHITE + +GrDirectContext* SkImage_Base::directContext() const { +#if defined(SK_GANESH) + return GrAsDirectContext(this->context()); +#else + return nullptr; +#endif +} + +bool SkImage_Base::onAsLegacyBitmap(GrDirectContext* dContext, SkBitmap* bitmap) const { + // As the base-class, all we can do is make a copy (regardless of mode). + // Subclasses that want to be more optimal should override. + SkImageInfo info = fInfo.makeColorType(kN32_SkColorType).makeColorSpace(nullptr); + if (!bitmap->tryAllocPixels(info)) { + return false; + } + + if (!this->readPixels(dContext, bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), + 0, 0)) { + bitmap->reset(); + return false; + } + + bitmap->setImmutable(); + return true; +} diff --git a/gfx/skia/skia/src/image/SkImage_Base.h b/gfx/skia/skia/src/image/SkImage_Base.h new file mode 100644 index 0000000000..f5fc008523 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Base.h @@ -0,0 +1,302 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImage_Base_DEFINED +#define SkImage_Base_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkTypes.h" +#include "src/core/SkMipmap.h" + +#include +#include +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/gpu/GrTypes.h" +#include "src/gpu/ganesh/SkGr.h" +#endif + +#if defined(SK_GRAPHITE) +namespace skgpu { +namespace graphite { +class TextureProxyView; +} +} +#endif + +class GrBackendTexture; +class GrDirectContext; +class GrFragmentProcessor; +class GrImageContext; +class GrRecordingContext; +class GrSurfaceProxyView; +class SkBitmap; +class SkColorSpace; +class SkMatrix; +class SkPixmap; +enum SkAlphaType : int; +enum SkColorType : int; +enum SkYUVColorSpace : int; +enum class GrColorType; +enum class SkTileMode; +struct SkIRect; +struct SkISize; +struct SkImageInfo; +struct SkRect; + +enum { + kNeedNewImageUniqueID = 0 +}; + +class SkImage_Base : public SkImage { +public: + ~SkImage_Base() override; + + virtual bool onPeekPixels(SkPixmap*) const { return false; } + + virtual const SkBitmap* onPeekBitmap() const { return nullptr; } + + virtual bool onReadPixels(GrDirectContext*, + const SkImageInfo& dstInfo, + void* dstPixels, + size_t dstRowBytes, + int srcX, + int srcY, + CachingHint) const = 0; + + virtual bool onHasMipmaps() const = 0; + + virtual SkMipmap* onPeekMips() const { return nullptr; } + + sk_sp refMips() const { + return sk_ref_sp(this->onPeekMips()); + } + + /** + * Default implementation does a rescale/read and then calls the callback. + */ + virtual void onAsyncRescaleAndReadPixels(const SkImageInfo&, + SkIRect srcRect, + RescaleGamma, + RescaleMode, + ReadPixelsCallback, + ReadPixelsContext) const; + /** + * Default implementation does a rescale/read/yuv conversion and then calls the callback. + */ + virtual void onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace, + sk_sp dstColorSpace, + SkIRect srcRect, + SkISize dstSize, + RescaleGamma, + RescaleMode, + ReadPixelsCallback, + ReadPixelsContext) const; + + virtual GrImageContext* context() const { return nullptr; } + + /** this->context() try-casted to GrDirectContext. Useful for migrations – avoid otherwise! */ + GrDirectContext* directContext() const; + +#if defined(SK_GANESH) + virtual GrSemaphoresSubmitted onFlush(GrDirectContext*, const GrFlushInfo&) const { + return GrSemaphoresSubmitted::kNo; + } + + // Returns a GrSurfaceProxyView representation of the image, if possible. This also returns + // a color type. This may be different than the image's color type when the image is not + // texture-backed and the capabilities of the GPU require a data type conversion to put + // the data in a texture. + std::tuple asView( + GrRecordingContext* context, + GrMipmapped mipmapped, + GrImageTexGenPolicy policy = GrImageTexGenPolicy::kDraw) const; + + /** + * Returns a GrFragmentProcessor that can be used with the passed GrRecordingContext to + * draw the image. SkSamplingOptions indicates the filter and SkTileMode[] indicates the x and + * y tile modes. The passed matrix is applied to the coordinates before sampling the image. + * Optional 'subset' indicates whether the tile modes should be applied to a subset of the image + * Optional 'domain' is a bound on the coordinates of the image that will be required and can be + * used to optimize the shader if 'subset' is also specified. + */ + std::unique_ptr asFragmentProcessor(GrRecordingContext*, + SkSamplingOptions, + const SkTileMode[2], + const SkMatrix&, + const SkRect* subset = nullptr, + const SkRect* domain = nullptr) const; + + // If this image is the current cached image snapshot of a surface then this is called when the + // surface is destroyed to indicate no further writes may happen to surface backing store. + virtual void generatingSurfaceIsDeleted() {} + + virtual GrBackendTexture onGetBackendTexture(bool flushPendingGrContextIO, + GrSurfaceOrigin* origin) const; +#endif +#if defined(SK_GRAPHITE) + // Returns a TextureProxyView representation of the image, if possible. This also returns + // a color type. This may be different than the image's color type when the image is not + // texture-backed and the capabilities of the GPU require a data type conversion to put + // the data in a texture. + std::tuple asView( + skgpu::graphite::Recorder*, + skgpu::Mipmapped) const; + +#endif +#if defined(SK_GANESH) || defined(SK_GRAPHITE) + bool isYUVA() const { + return this->type() == Type::kGaneshYUVA || this->type() == Type::kGraphiteYUVA; + } +#endif + + virtual bool onPinAsTexture(GrRecordingContext*) const { return false; } + virtual void onUnpinAsTexture(GrRecordingContext*) const {} + virtual bool isPinnedOnContext(GrRecordingContext*) const { return false; } + + // return a read-only copy of the pixels. We promise to not modify them, + // but only inspect them (or encode them). + virtual bool getROPixels(GrDirectContext*, SkBitmap*, + CachingHint = kAllow_CachingHint) const = 0; + + virtual sk_sp onMakeSubset(const SkIRect&, GrDirectContext*) const = 0; + + virtual sk_sp onRefEncoded() const { return nullptr; } + + virtual bool onAsLegacyBitmap(GrDirectContext*, SkBitmap*) const; + + enum class Type { + kUnknown, + kRaster, + kRasterPinnable, + kLazy, + kGanesh, + kGaneshYUVA, + kGraphite, + kGraphiteYUVA, + }; + + virtual Type type() const { return Type::kUnknown; } + + // True for picture-backed and codec-backed + bool onIsLazyGenerated() const { return this->type() == Type::kLazy; } + + // True for images instantiated by Ganesh in GPU memory + bool isGaneshBacked() const { + return this->type() == Type::kGanesh || this->type() == Type::kGaneshYUVA; + } + + // True for images instantiated by Graphite in GPU memory + bool isGraphiteBacked() const { + return this->type() == Type::kGraphite || this->type() == Type::kGraphiteYUVA; + } + + // Amount of texture memory used by texture-backed images. + virtual size_t onTextureSize() const { return 0; } + + // Call when this image is part of the key to a resourcecache entry. This allows the cache + // to know automatically those entries can be purged when this SkImage deleted. + virtual void notifyAddedToRasterCache() const { + fAddedToRasterCache.store(true); + } + + virtual bool onIsValid(GrRecordingContext*) const = 0; + + virtual sk_sp onMakeColorTypeAndColorSpace(SkColorType, sk_sp, + GrDirectContext*) const = 0; + + virtual sk_sp onReinterpretColorSpace(sk_sp) const = 0; + + // on failure, returns nullptr + virtual sk_sp onMakeWithMipmaps(sk_sp) const { + return nullptr; + } + +#if defined(SK_GRAPHITE) + virtual sk_sp onMakeTextureImage(skgpu::graphite::Recorder*, + RequiredImageProperties) const = 0; + virtual sk_sp onMakeSubset(const SkIRect&, + skgpu::graphite::Recorder*, + RequiredImageProperties) const = 0; + virtual sk_sp onMakeColorTypeAndColorSpace(SkColorType, + sk_sp, + skgpu::graphite::Recorder*, + RequiredImageProperties) const = 0; +#endif + +protected: + SkImage_Base(const SkImageInfo& info, uint32_t uniqueID); + +#if defined(SK_GANESH) + // Utility for making a copy of an existing view when the GrImageTexGenPolicy is not kDraw. + static GrSurfaceProxyView CopyView(GrRecordingContext*, + GrSurfaceProxyView src, + GrMipmapped, + GrImageTexGenPolicy, + std::string_view label); + + static std::unique_ptr MakeFragmentProcessorFromView(GrRecordingContext*, + GrSurfaceProxyView, + SkAlphaType, + SkSamplingOptions, + const SkTileMode[2], + const SkMatrix&, + const SkRect* subset, + const SkRect* domain); + + /** + * Returns input view if it is already mipmapped. Otherwise, attempts to make a mipmapped view + * with the same contents. If the mipmapped copy is successfully created it will be cached + * using the image unique ID. A subsequent call with the same unique ID will return the cached + * view if it has not been purged. The view is cached with a key domain specific to this + * function. + */ + static GrSurfaceProxyView FindOrMakeCachedMipmappedView(GrRecordingContext*, + GrSurfaceProxyView, + uint32_t imageUniqueID); +#endif + +private: +#if defined(SK_GANESH) + virtual std::tuple onAsView( + GrRecordingContext*, + GrMipmapped, + GrImageTexGenPolicy policy) const = 0; + + virtual std::unique_ptr onAsFragmentProcessor( + GrRecordingContext*, + SkSamplingOptions, + const SkTileMode[2], + const SkMatrix&, + const SkRect* subset, + const SkRect* domain) const = 0; +#endif + + // Set true by caches when they cache content that's derived from the current pixels. + mutable std::atomic fAddedToRasterCache; +}; + +static inline SkImage_Base* as_IB(SkImage* image) { + return static_cast(image); +} + +static inline SkImage_Base* as_IB(const sk_sp& image) { + return static_cast(image.get()); +} + +static inline const SkImage_Base* as_IB(const SkImage* image) { + return static_cast(image); +} + +#endif diff --git a/gfx/skia/skia/src/image/SkImage_Gpu.cpp b/gfx/skia/skia/src/image/SkImage_Gpu.cpp new file mode 100644 index 0000000000..a8d9818b79 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Gpu.cpp @@ -0,0 +1,821 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkImage_Gpu.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageGenerator.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkSize.h" +#include "include/core/SkSurface.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrContextThreadSafeProxy.h" +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/private/base/SkAssert.h" +#include "include/private/gpu/ganesh/GrImageContext.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkAutoPixmapStorage.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/gpu/RefCntedCallback.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrBackendTextureImageGenerator.h" +#include "src/gpu/ganesh/GrBackendUtils.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrContextThreadSafeProxyPriv.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrGpu.h" +#include "src/gpu/ganesh/GrGpuResourcePriv.h" +#include "src/gpu/ganesh/GrImageContextPriv.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrRenderTask.h" +#include "src/gpu/ganesh/GrSemaphore.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrTexture.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/SurfaceContext.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/image/SkImage_Base.h" + +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 +#include "src/gpu/ganesh/GrAHardwareBufferImageGenerator.h" +#include "src/gpu/ganesh/GrAHardwareBufferUtils_impl.h" +#endif + +#include +#include +#include + +class SkMatrix; +enum SkColorType : int; +enum class SkTextureCompressionType; +enum class SkTileMode; + +inline SkImage_Gpu::ProxyChooser::ProxyChooser(sk_sp stableProxy) + : fStableProxy(std::move(stableProxy)) { + SkASSERT(fStableProxy); +} + +inline SkImage_Gpu::ProxyChooser::ProxyChooser(sk_sp stableProxy, + sk_sp volatileProxy, + sk_sp copyTask, + int volatileProxyTargetCount) + : fStableProxy(std::move(stableProxy)) + , fVolatileProxy(std::move(volatileProxy)) + , fVolatileToStableCopyTask(std::move(copyTask)) + , fVolatileProxyTargetCount(volatileProxyTargetCount) { + SkASSERT(fStableProxy); + SkASSERT(fVolatileProxy); + SkASSERT(fVolatileToStableCopyTask); +} + +inline SkImage_Gpu::ProxyChooser::~ProxyChooser() { + // The image is being destroyed. If there is a stable copy proxy but we've been able to use + // the volatile proxy for all requests then we can skip the copy. + if (fVolatileToStableCopyTask) { + fVolatileToStableCopyTask->makeSkippable(); + } +} + +inline sk_sp SkImage_Gpu::ProxyChooser::chooseProxy(GrRecordingContext* context) { + SkAutoSpinlock hold(fLock); + if (fVolatileProxy) { + SkASSERT(fVolatileProxyTargetCount <= fVolatileProxy->getTaskTargetCount()); + // If this image is used off the direct context it originated on, i.e. on a recording-only + // context, we don't know how the recording context's actions are ordered WRT direct context + // actions until the recording context's DAG is imported into the direct context. + if (context->asDirectContext() && + fVolatileProxyTargetCount == fVolatileProxy->getTaskTargetCount()) { + return fVolatileProxy; + } + fVolatileProxy.reset(); + fVolatileToStableCopyTask.reset(); + return fStableProxy; + } + return fStableProxy; +} + +inline sk_sp SkImage_Gpu::ProxyChooser::switchToStableProxy() { + SkAutoSpinlock hold(fLock); + fVolatileProxy.reset(); + fVolatileToStableCopyTask.reset(); + return fStableProxy; +} + +inline sk_sp SkImage_Gpu::ProxyChooser::makeVolatileProxyStable() { + SkAutoSpinlock hold(fLock); + if (fVolatileProxy) { + fStableProxy = std::move(fVolatileProxy); + fVolatileToStableCopyTask->makeSkippable(); + fVolatileToStableCopyTask.reset(); + } + return fStableProxy; +} + +inline bool SkImage_Gpu::ProxyChooser::surfaceMustCopyOnWrite(GrSurfaceProxy* surfaceProxy) const { + SkAutoSpinlock hold(fLock); + return surfaceProxy->underlyingUniqueID() == fStableProxy->underlyingUniqueID(); +} + +inline size_t SkImage_Gpu::ProxyChooser::gpuMemorySize() const { + SkAutoSpinlock hold(fLock); + size_t size = fStableProxy->gpuMemorySize(); + if (fVolatileProxy) { + SkASSERT(fVolatileProxy->gpuMemorySize() == size); + } + return size; +} + +inline GrMipmapped SkImage_Gpu::ProxyChooser::mipmapped() const { + SkAutoSpinlock hold(fLock); + GrMipmapped mipmapped = fStableProxy->asTextureProxy()->mipmapped(); + if (fVolatileProxy) { + SkASSERT(fVolatileProxy->asTextureProxy()->mipmapped() == mipmapped); + } + return mipmapped; +} + +#ifdef SK_DEBUG +inline GrBackendFormat SkImage_Gpu::ProxyChooser::backendFormat() { + SkAutoSpinlock hold(fLock); + if (fVolatileProxy) { + SkASSERT(fVolatileProxy->backendFormat() == fStableProxy->backendFormat()); + } + return fStableProxy->backendFormat(); +} +#endif + +////////////////////////////////////////////////////////////////////////////// + +SkImage_Gpu::SkImage_Gpu(sk_sp context, + uint32_t uniqueID, + GrSurfaceProxyView view, + SkColorInfo info) + : INHERITED(std::move(context), + SkImageInfo::Make(view.proxy()->backingStoreDimensions(), std::move(info)), + uniqueID) + , fChooser(view.detachProxy()) + , fSwizzle(view.swizzle()) + , fOrigin(view.origin()) { +#ifdef SK_DEBUG + const GrBackendFormat& format = fChooser.backendFormat(); + const GrCaps* caps = this->context()->priv().caps(); + GrColorType grCT = SkColorTypeToGrColorType(this->colorType()); + SkASSERT(caps->isFormatCompressed(format) || + caps->areColorTypeAndFormatCompatible(grCT, format)); +#endif +} + +SkImage_Gpu::SkImage_Gpu(sk_sp dContext, + GrSurfaceProxyView volatileSrc, + sk_sp stableCopy, + sk_sp copyTask, + int volatileSrcTargetCount, + SkColorInfo info) + : INHERITED(std::move(dContext), + SkImageInfo::Make(volatileSrc.proxy()->backingStoreDimensions(), + std::move(info)), + kNeedNewImageUniqueID) + , fChooser(std::move(stableCopy), + volatileSrc.detachProxy(), + std::move(copyTask), + volatileSrcTargetCount) + , fSwizzle(volatileSrc.swizzle()) + , fOrigin(volatileSrc.origin()) { +#ifdef SK_DEBUG + const GrBackendFormat& format = fChooser.backendFormat(); + const GrCaps* caps = this->context()->priv().caps(); + GrColorType grCT = SkColorTypeToGrColorType(this->colorType()); + SkASSERT(caps->isFormatCompressed(format) || + caps->areColorTypeAndFormatCompatible(grCT, format)); +#endif +} + +sk_sp SkImage_Gpu::MakeWithVolatileSrc(sk_sp rContext, + GrSurfaceProxyView volatileSrc, + SkColorInfo colorInfo) { + SkASSERT(rContext); + SkASSERT(volatileSrc); + SkASSERT(volatileSrc.proxy()->asTextureProxy()); + GrMipmapped mm = volatileSrc.proxy()->asTextureProxy()->mipmapped(); + sk_sp copyTask; + auto copy = GrSurfaceProxy::Copy(rContext.get(), + volatileSrc.refProxy(), + volatileSrc.origin(), + mm, + SkBackingFit::kExact, + skgpu::Budgeted::kYes, + /*label=*/"ImageGpu_MakeWithVolatileSrc", + ©Task); + if (!copy) { + return nullptr; + } + // We only attempt to make a dual-proxy image on a direct context. This optimziation requires + // knowing how things are ordered and recording-only contexts are not well ordered WRT other + // recording contexts. + if (auto direct = sk_ref_sp(rContext->asDirectContext())) { + int targetCount = volatileSrc.proxy()->getTaskTargetCount(); + return sk_sp(new SkImage_Gpu(std::move(direct), + std::move(volatileSrc), + std::move(copy), + std::move(copyTask), + targetCount, + std::move(colorInfo))); + } + GrSurfaceProxyView copyView(std::move(copy), volatileSrc.origin(), volatileSrc.swizzle()); + return sk_make_sp(std::move(rContext), + kNeedNewImageUniqueID, + std::move(copyView), + std::move(colorInfo)); +} + +SkImage_Gpu::~SkImage_Gpu() = default; + +bool SkImage_Gpu::surfaceMustCopyOnWrite(GrSurfaceProxy* surfaceProxy) const { + return fChooser.surfaceMustCopyOnWrite(surfaceProxy); +} + +bool SkImage_Gpu::onHasMipmaps() const { return fChooser.mipmapped() == GrMipmapped::kYes; } + +GrSemaphoresSubmitted SkImage_Gpu::onFlush(GrDirectContext* dContext, + const GrFlushInfo& info) const { + if (!fContext->priv().matches(dContext) || dContext->abandoned()) { + if (info.fSubmittedProc) { + info.fSubmittedProc(info.fSubmittedContext, false); + } + if (info.fFinishedProc) { + info.fFinishedProc(info.fFinishedContext); + } + return GrSemaphoresSubmitted::kNo; + } + + sk_sp proxy = fChooser.chooseProxy(dContext); + return dContext->priv().flushSurface(proxy.get(), + SkSurface::BackendSurfaceAccess::kNoAccess, + info); +} + +GrBackendTexture SkImage_Gpu::onGetBackendTexture(bool flushPendingGrContextIO, + GrSurfaceOrigin* origin) const { + auto direct = fContext->asDirectContext(); + if (!direct) { + // This image was created with a DDL context and cannot be instantiated. + return GrBackendTexture(); // invalid + } + if (direct->abandoned()) { + return GrBackendTexture(); // invalid; + } + + // We don't know how client's use of the texture will be ordered WRT Skia's. Ensure the + // texture seen by the client won't be mutated by a SkSurface. + sk_sp proxy = fChooser.switchToStableProxy(); + + if (!proxy->isInstantiated()) { + auto resourceProvider = direct->priv().resourceProvider(); + + if (!proxy->instantiate(resourceProvider)) { + return GrBackendTexture(); // invalid + } + } + + GrTexture* texture = proxy->peekTexture(); + if (texture) { + if (flushPendingGrContextIO) { + direct->priv().flushSurface(proxy.get()); + } + if (origin) { + *origin = fOrigin; + } + return texture->getBackendTexture(); + } + return GrBackendTexture(); // invalid +} + +size_t SkImage_Gpu::onTextureSize() const { return fChooser.gpuMemorySize(); } + +sk_sp SkImage_Gpu::onMakeColorTypeAndColorSpace(SkColorType targetCT, + sk_sp targetCS, + GrDirectContext* dContext) const { + SkColorInfo info(targetCT, this->alphaType(), std::move(targetCS)); + if (!fContext->priv().matches(dContext)) { + return nullptr; + } + + auto sfc = dContext->priv().makeSFCWithFallback(GrImageInfo(info, this->dimensions()), + SkBackingFit::kExact); + if (!sfc) { + return nullptr; + } + // We respecify info's CT because we called MakeWithFallback. + auto ct = GrColorTypeToSkColorType(sfc->colorInfo().colorType()); + info = info.makeColorType(ct); + + // Draw this image's texture into the SFC. + auto [view, _] = this->asView(dContext, GrMipmapped(this->hasMipmaps())); + auto texFP = GrTextureEffect::Make(std::move(view), this->alphaType()); + auto colorFP = GrColorSpaceXformEffect::Make(std::move(texFP), + this->imageInfo().colorInfo(), + info); + sfc->fillWithFP(std::move(colorFP)); + + return sk_make_sp(sk_ref_sp(dContext), + kNeedNewImageUniqueID, + sfc->readSurfaceView(), + std::move(info)); +} + +sk_sp SkImage_Gpu::onReinterpretColorSpace(sk_sp newCS) const { + // It doesn't seem worth the complexity of trying to share the ProxyChooser among multiple + // images. Just fall back to the stable copy. + GrSurfaceProxyView view(fChooser.switchToStableProxy(), fOrigin, fSwizzle); + return sk_make_sp(fContext, + kNeedNewImageUniqueID, + std::move(view), + this->imageInfo().colorInfo().makeColorSpace(std::move(newCS))); +} + +void SkImage_Gpu::onAsyncRescaleAndReadPixels(const SkImageInfo& info, + SkIRect srcRect, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const { + auto dContext = fContext->asDirectContext(); + if (!dContext) { + // DDL TODO: buffer up the readback so it occurs when the DDL is drawn? + callback(context, nullptr); + return; + } + auto ctx = dContext->priv().makeSC(this->makeView(dContext), this->imageInfo().colorInfo()); + if (!ctx) { + callback(context, nullptr); + return; + } + ctx->asyncRescaleAndReadPixels(dContext, info, srcRect, rescaleGamma, rescaleMode, + callback, context); +} + +void SkImage_Gpu::onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace, + sk_sp dstColorSpace, + SkIRect srcRect, + SkISize dstSize, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) const { + auto dContext = fContext->asDirectContext(); + if (!dContext) { + // DDL TODO: buffer up the readback so it occurs when the DDL is drawn? + callback(context, nullptr); + return; + } + auto ctx = dContext->priv().makeSC(this->makeView(dContext), this->imageInfo().colorInfo()); + if (!ctx) { + callback(context, nullptr); + return; + } + ctx->asyncRescaleAndReadPixelsYUV420(dContext, + yuvColorSpace, + std::move(dstColorSpace), + srcRect, + dstSize, + rescaleGamma, + rescaleMode, + callback, + context); +} + +void SkImage_Gpu::generatingSurfaceIsDeleted() { fChooser.makeVolatileProxyStable(); } + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static sk_sp new_wrapped_texture_common(GrRecordingContext* rContext, + const GrBackendTexture& backendTex, + GrColorType colorType, + GrSurfaceOrigin origin, + SkAlphaType at, + sk_sp colorSpace, + GrWrapOwnership ownership, + sk_sp releaseHelper) { + if (!backendTex.isValid() || backendTex.width() <= 0 || backendTex.height() <= 0) { + return nullptr; + } + + GrProxyProvider* proxyProvider = rContext->priv().proxyProvider(); + sk_sp proxy = proxyProvider->wrapBackendTexture( + backendTex, ownership, GrWrapCacheable::kNo, kRead_GrIOType, std::move(releaseHelper)); + if (!proxy) { + return nullptr; + } + + skgpu::Swizzle swizzle = rContext->priv().caps()->getReadSwizzle(proxy->backendFormat(), + colorType); + GrSurfaceProxyView view(std::move(proxy), origin, swizzle); + SkColorInfo info(GrColorTypeToSkColorType(colorType), at, std::move(colorSpace)); + return sk_make_sp(sk_ref_sp(rContext), + kNeedNewImageUniqueID, + std::move(view), + std::move(info)); +} + +sk_sp SkImage::MakeFromCompressedTexture(GrRecordingContext* rContext, + const GrBackendTexture& tex, + GrSurfaceOrigin origin, + SkAlphaType at, + sk_sp cs, + TextureReleaseProc releaseP, + ReleaseContext releaseC) { + auto releaseHelper = skgpu::RefCntedCallback::Make(releaseP, releaseC); + + if (!rContext) { + return nullptr; + } + + const GrCaps* caps = rContext->priv().caps(); + + if (!SkImage_GpuBase::ValidateCompressedBackendTexture(caps, tex, at)) { + return nullptr; + } + + GrProxyProvider* proxyProvider = rContext->priv().proxyProvider(); + sk_sp proxy = proxyProvider->wrapCompressedBackendTexture( + tex, kBorrow_GrWrapOwnership, GrWrapCacheable::kNo, std::move(releaseHelper)); + if (!proxy) { + return nullptr; + } + + SkTextureCompressionType type = GrBackendFormatToCompressionType(tex.getBackendFormat()); + SkColorType ct = GrCompressionTypeToSkColorType(type); + + GrSurfaceProxyView view(std::move(proxy), origin, skgpu::Swizzle::RGBA()); + return sk_make_sp(sk_ref_sp(rContext), + kNeedNewImageUniqueID, + std::move(view), + SkColorInfo(ct, at, std::move(cs))); +} + +sk_sp SkImage::MakeFromTexture(GrRecordingContext* rContext, + const GrBackendTexture& tex, GrSurfaceOrigin origin, + SkColorType ct, SkAlphaType at, sk_sp cs, + TextureReleaseProc releaseP, ReleaseContext releaseC) { + auto releaseHelper = skgpu::RefCntedCallback::Make(releaseP, releaseC); + + if (!rContext) { + return nullptr; + } + + const GrCaps* caps = rContext->priv().caps(); + + GrColorType grColorType = SkColorTypeToGrColorType(ct); + if (GrColorType::kUnknown == grColorType) { + return nullptr; + } + + if (!SkImage_GpuBase::ValidateBackendTexture(caps, tex, grColorType, ct, at, cs)) { + return nullptr; + } + + return new_wrapped_texture_common(rContext, tex, grColorType, origin, at, std::move(cs), + kBorrow_GrWrapOwnership, std::move(releaseHelper)); +} + +sk_sp SkImage::MakeFromAdoptedTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin textureOrigin, + SkColorType colorType) { + return SkImage::MakeFromAdoptedTexture(context, backendTexture, textureOrigin, + colorType, kPremul_SkAlphaType, nullptr); +} +sk_sp SkImage::MakeFromAdoptedTexture(GrRecordingContext* context, + const GrBackendTexture& backendTexture, + GrSurfaceOrigin textureOrigin, + SkColorType colorType, + SkAlphaType alphaType) { + return SkImage::MakeFromAdoptedTexture(context, backendTexture, textureOrigin, + colorType, alphaType, nullptr); +} + +sk_sp SkImage::MakeFromAdoptedTexture(GrRecordingContext* rContext, + const GrBackendTexture& tex, GrSurfaceOrigin origin, + SkColorType ct, SkAlphaType at, + sk_sp cs) { + auto dContext = GrAsDirectContext(rContext); + if (!dContext) { + // We have a DDL context and we don't support adopted textures for them. + return nullptr; + } + + const GrCaps* caps = dContext->priv().caps(); + + GrColorType grColorType = SkColorTypeToGrColorType(ct); + if (GrColorType::kUnknown == grColorType) { + return nullptr; + } + + if (!SkImage_GpuBase::ValidateBackendTexture(caps, tex, grColorType, ct, at, cs)) { + return nullptr; + } + + return new_wrapped_texture_common(dContext, tex, grColorType, origin, at, std::move(cs), + kAdopt_GrWrapOwnership, nullptr); +} + +sk_sp SkImage::MakeTextureFromCompressed(GrDirectContext* direct, sk_sp data, + int width, int height, SkTextureCompressionType type, + GrMipmapped mipmapped, + GrProtected isProtected) { + if (!direct || !data) { + return nullptr; + } + + GrBackendFormat beFormat = direct->compressedBackendFormat(type); + if (!beFormat.isValid()) { + sk_sp tmp = MakeRasterFromCompressed(std::move(data), width, height, type); + if (!tmp) { + return nullptr; + } + return tmp->makeTextureImage(direct, mipmapped); + } + + GrProxyProvider* proxyProvider = direct->priv().proxyProvider(); + sk_sp proxy = proxyProvider->createCompressedTextureProxy( + {width, height}, skgpu::Budgeted::kYes, mipmapped, isProtected, type, std::move(data)); + if (!proxy) { + return nullptr; + } + GrSurfaceProxyView view(std::move(proxy)); + + SkColorType colorType = GrCompressionTypeToSkColorType(type); + + return sk_make_sp(sk_ref_sp(direct), + kNeedNewImageUniqueID, + std::move(view), + SkColorInfo(colorType, kOpaque_SkAlphaType, nullptr)); +} + +sk_sp SkImage::makeTextureImage(GrDirectContext* dContext, + GrMipmapped mipmapped, + skgpu::Budgeted budgeted) const { + if (!dContext) { + return nullptr; + } + if (!dContext->priv().caps()->mipmapSupport() || this->dimensions().area() <= 1) { + mipmapped = GrMipmapped::kNo; + } + + if (as_IB(this)->isGaneshBacked()) { + if (!as_IB(this)->context()->priv().matches(dContext)) { + return nullptr; + } + + if (mipmapped == GrMipmapped::kNo || this->hasMipmaps()) { + return sk_ref_sp(const_cast(this)); + } + } + GrImageTexGenPolicy policy = budgeted == skgpu::Budgeted::kYes + ? GrImageTexGenPolicy::kNew_Uncached_Budgeted + : GrImageTexGenPolicy::kNew_Uncached_Unbudgeted; + // TODO: Don't flatten YUVA images here. Add mips to the planes instead. + auto [view, ct] = as_IB(this)->asView(dContext, mipmapped, policy); + if (!view) { + return nullptr; + } + SkASSERT(view.asTextureProxy()); + SkASSERT(mipmapped == GrMipmapped::kNo || + view.asTextureProxy()->mipmapped() == GrMipmapped::kYes); + SkColorInfo colorInfo(GrColorTypeToSkColorType(ct), this->alphaType(), this->refColorSpace()); + return sk_make_sp(sk_ref_sp(dContext), + this->uniqueID(), + std::move(view), + std::move(colorInfo)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImage::MakePromiseTexture(sk_sp threadSafeProxy, + const GrBackendFormat& backendFormat, + SkISize dimensions, + GrMipmapped mipmapped, + GrSurfaceOrigin origin, + SkColorType colorType, + SkAlphaType alphaType, + sk_sp colorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContext) { + // Our contract is that we will always call the release proc even on failure. + // We use the helper to convey the context, so we need to ensure make doesn't fail. + textureReleaseProc = textureReleaseProc ? textureReleaseProc : [](void*) {}; + auto releaseHelper = skgpu::RefCntedCallback::Make(textureReleaseProc, textureContext); + SkImageInfo info = SkImageInfo::Make(dimensions, colorType, alphaType, colorSpace); + if (!SkImageInfoIsValid(info)) { + return nullptr; + } + + if (!threadSafeProxy) { + return nullptr; + } + + if (dimensions.isEmpty()) { + return nullptr; + } + + GrColorType grColorType = SkColorTypeToGrColorType(colorType); + if (GrColorType::kUnknown == grColorType) { + return nullptr; + } + + if (!threadSafeProxy->priv().caps()->areColorTypeAndFormatCompatible(grColorType, + backendFormat)) { + return nullptr; + } + + auto proxy = SkImage_GpuBase::MakePromiseImageLazyProxy(threadSafeProxy.get(), + dimensions, + backendFormat, + mipmapped, + textureFulfillProc, + std::move(releaseHelper)); + if (!proxy) { + return nullptr; + } + skgpu::Swizzle swizzle = threadSafeProxy->priv().caps()->getReadSwizzle(backendFormat, + grColorType); + GrSurfaceProxyView view(std::move(proxy), origin, swizzle); + sk_sp ctx(GrImageContextPriv::MakeForPromiseImage(std::move(threadSafeProxy))); + return sk_make_sp(std::move(ctx), + kNeedNewImageUniqueID, + std::move(view), + SkColorInfo(colorType, alphaType, std::move(colorSpace))); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImage::MakeCrossContextFromPixmap(GrDirectContext* dContext, + const SkPixmap& originalPixmap, bool buildMips, + bool limitToMaxTextureSize) { + // Some backends or drivers don't support (safely) moving resources between contexts + if (!dContext || !dContext->priv().caps()->crossContextTextureSupport()) { + return SkImage::MakeRasterCopy(originalPixmap); + } + + // If non-power-of-two mipmapping isn't supported, ignore the client's request + if (!dContext->priv().caps()->mipmapSupport()) { + buildMips = false; + } + + const SkPixmap* pixmap = &originalPixmap; + SkAutoPixmapStorage resized; + int maxTextureSize = dContext->priv().caps()->maxTextureSize(); + int maxDim = std::max(originalPixmap.width(), originalPixmap.height()); + if (limitToMaxTextureSize && maxDim > maxTextureSize) { + float scale = static_cast(maxTextureSize) / maxDim; + int newWidth = std::min(static_cast(originalPixmap.width() * scale), maxTextureSize); + int newHeight = std::min(static_cast(originalPixmap.height() * scale), maxTextureSize); + SkImageInfo info = originalPixmap.info().makeWH(newWidth, newHeight); + SkSamplingOptions sampling(SkFilterMode::kLinear); + if (!resized.tryAlloc(info) || !originalPixmap.scalePixels(resized, sampling)) { + return nullptr; + } + pixmap = &resized; + } + // Turn the pixmap into a GrTextureProxy + SkBitmap bmp; + bmp.installPixels(*pixmap); + GrMipmapped mipmapped = buildMips ? GrMipmapped::kYes : GrMipmapped::kNo; + auto [view, ct] = GrMakeUncachedBitmapProxyView(dContext, bmp, mipmapped); + if (!view) { + return SkImage::MakeRasterCopy(*pixmap); + } + + sk_sp texture = sk_ref_sp(view.proxy()->peekTexture()); + + // Flush any writes or uploads + dContext->priv().flushSurface(view.proxy()); + GrGpu* gpu = dContext->priv().getGpu(); + + std::unique_ptr sema = gpu->prepareTextureForCrossContextUsage(texture.get()); + + SkColorType skCT = GrColorTypeToSkColorType(ct); + auto gen = GrBackendTextureImageGenerator::Make(std::move(texture), view.origin(), + std::move(sema), skCT, + pixmap->alphaType(), + pixmap->info().refColorSpace()); + return SkImage::MakeFromGenerator(std::move(gen)); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkImage::MakeBackendTextureFromSkImage(GrDirectContext* direct, + sk_sp image, + GrBackendTexture* backendTexture, + BackendTextureReleaseProc* releaseProc) { + if (!image || !backendTexture || !releaseProc) { + return false; + } + + auto [view, ct] = as_IB(image)->asView(direct, GrMipmapped::kNo); + + if (!view) { + return false; + } + + // Flush any pending IO on the texture. + direct->priv().flushSurface(view.proxy()); + + GrTexture* texture = view.asTextureProxy()->peekTexture(); + if (!texture) { + return false; + } + // We must make a copy of the image if the image is not unique, if the GrTexture owned by the + // image is not unique, or if the texture wraps an external object. + if (!image->unique() || !texture->unique() || + texture->resourcePriv().refsWrappedObjects()) { + // onMakeSubset will always copy the image. + image = as_IB(image)->onMakeSubset(image->bounds(), direct); + if (!image) { + return false; + } + return MakeBackendTextureFromSkImage(direct, std::move(image), backendTexture, releaseProc); + } + + SkASSERT(!texture->resourcePriv().refsWrappedObjects()); + SkASSERT(texture->unique()); + SkASSERT(image->unique()); + + // Take a reference to the GrTexture and release the image. + sk_sp textureRef = sk_ref_sp(texture); + view.reset(); + image = nullptr; + SkASSERT(textureRef->unique()); + + // Steal the backend texture from the GrTexture, releasing the GrTexture in the process. + return GrTexture::StealBackendTexture(std::move(textureRef), backendTexture, releaseProc); +} + +std::tuple SkImage_Gpu::onAsView( + GrRecordingContext* recordingContext, + GrMipmapped mipmapped, + GrImageTexGenPolicy policy) const { + if (!fContext->priv().matches(recordingContext)) { + return {}; + } + if (policy != GrImageTexGenPolicy::kDraw) { + return {CopyView(recordingContext, + this->makeView(recordingContext), + mipmapped, + policy, + /*label=*/"SkImageGpu_AsView"), + SkColorTypeToGrColorType(this->colorType())}; + } + GrSurfaceProxyView view = this->makeView(recordingContext); + GrColorType ct = SkColorTypeToGrColorType(this->colorType()); + if (mipmapped == GrMipmapped::kYes) { + view = FindOrMakeCachedMipmappedView(recordingContext, std::move(view), this->uniqueID()); + } + return {std::move(view), ct}; +} + +std::unique_ptr SkImage_Gpu::onAsFragmentProcessor( + GrRecordingContext* rContext, + SkSamplingOptions sampling, + const SkTileMode tileModes[2], + const SkMatrix& m, + const SkRect* subset, + const SkRect* domain) const { + if (!fContext->priv().matches(rContext)) { + return {}; + } + auto mm = sampling.mipmap == SkMipmapMode::kNone ? GrMipmapped::kNo : GrMipmapped::kYes; + return MakeFragmentProcessorFromView(rContext, + std::get<0>(this->asView(rContext, mm)), + this->alphaType(), + sampling, + tileModes, + m, + subset, + domain); +} + +GrSurfaceProxyView SkImage_Gpu::makeView(GrRecordingContext* rContext) const { + return {fChooser.chooseProxy(rContext), fOrigin, fSwizzle}; +} diff --git a/gfx/skia/skia/src/image/SkImage_Gpu.h b/gfx/skia/skia/src/image/SkImage_Gpu.h new file mode 100644 index 0000000000..71cebb0eb1 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Gpu.h @@ -0,0 +1,179 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImage_Gpu_DEFINED +#define SkImage_Gpu_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/private/SkSpinlock.h" +#include "include/private/base/SkThreadAnnotations.h" +#include "src/gpu/Swizzle.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/image/SkImage_Base.h" +#include "src/image/SkImage_GpuBase.h" + +#include +#include +#include +#include + +class GrDirectContext; +class GrFragmentProcessor; +class GrImageContext; +class GrRecordingContext; +class GrRenderTask; +class GrSurfaceProxy; +class SkColorInfo; +class SkColorSpace; +class SkImage; +class SkMatrix; +enum GrSurfaceOrigin : int; +enum SkColorType : int; +enum SkYUVColorSpace : int; +enum class GrColorType; +enum class GrImageTexGenPolicy : int; +enum class GrSemaphoresSubmitted : bool; +enum class SkTileMode; +struct GrFlushInfo; +struct SkIRect; +struct SkISize; +struct SkImageInfo; +struct SkRect; + +namespace skgpu { +enum class Mipmapped : bool; +} + +class SkImage_Gpu final : public SkImage_GpuBase { +public: + SkImage_Gpu(sk_sp context, + uint32_t uniqueID, + GrSurfaceProxyView view, + SkColorInfo info); + + static sk_sp MakeWithVolatileSrc(sk_sp rContext, + GrSurfaceProxyView volatileSrc, + SkColorInfo colorInfo); + + ~SkImage_Gpu() override; + + // If this is image is a cached SkSurface snapshot then this method is called by the SkSurface + // before a write to check if the surface must make a copy to avoid modifying the image's + // contents. + bool surfaceMustCopyOnWrite(GrSurfaceProxy* surfaceProxy) const; + + bool onHasMipmaps() const override; + + GrSemaphoresSubmitted onFlush(GrDirectContext*, const GrFlushInfo&) const override; + + GrBackendTexture onGetBackendTexture(bool flushPendingGrContextIO, + GrSurfaceOrigin* origin) const final; + + SkImage_Base::Type type() const override { return SkImage_Base::Type::kGanesh; } + + size_t onTextureSize() const override; + + using SkImage_GpuBase::onMakeColorTypeAndColorSpace; + sk_sp onMakeColorTypeAndColorSpace(SkColorType, + sk_sp, + GrDirectContext*) const final; + + sk_sp onReinterpretColorSpace(sk_sp) const final; + + void onAsyncRescaleAndReadPixels(const SkImageInfo&, + SkIRect srcRect, + RescaleGamma, + RescaleMode, + ReadPixelsCallback, + ReadPixelsContext) const override; + + void onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace, + sk_sp, + SkIRect srcRect, + SkISize dstSize, + RescaleGamma, + RescaleMode, + ReadPixelsCallback, + ReadPixelsContext) const override; + + void generatingSurfaceIsDeleted() override; + +private: + SkImage_Gpu(sk_sp, + GrSurfaceProxyView volatileSrc, + sk_sp stableCopy, + sk_sp copyTask, + int volatileSrcTargetCount, + SkColorInfo); + + std::tuple onAsView(GrRecordingContext*, + skgpu::Mipmapped, + GrImageTexGenPolicy) const override; + + std::unique_ptr onAsFragmentProcessor(GrRecordingContext*, + SkSamplingOptions, + const SkTileMode[2], + const SkMatrix&, + const SkRect*, + const SkRect*) const override; + + GrSurfaceProxyView makeView(GrRecordingContext*) const; + + // Thread-safe wrapper around the proxies backing this image. Handles dynamically switching + // from a "volatile" proxy that may be overwritten (by an SkSurface that this image was snapped + // from) to a "stable" proxy that is a copy of the volatile proxy. It allows the image to cancel + // the copy if the stable proxy is never required because the contents of the volatile proxy + // were never mutated by the SkSurface during the image lifetime. + class ProxyChooser { + public: + ProxyChooser(sk_sp stableProxy, + sk_sp volatileProxy, + sk_sp copyTask, + int volatileProxyTargetCount); + + ProxyChooser(sk_sp stableProxy); + + ~ProxyChooser(); + + // Checks if there is a volatile proxy that is safe to use. If so returns it, otherwise + // returns the stable proxy (and drops the volatile one if it exists). + sk_sp chooseProxy(GrRecordingContext* context) SK_EXCLUDES(fLock); + // Call when it is known copy is necessary. + sk_sp switchToStableProxy() SK_EXCLUDES(fLock); + // Call when it is known for sure copy won't be necessary. + sk_sp makeVolatileProxyStable() SK_EXCLUDES(fLock); + + bool surfaceMustCopyOnWrite(GrSurfaceProxy* surfaceProxy) const SK_EXCLUDES(fLock); + + // Queries that should be independent of which proxy is in use. + size_t gpuMemorySize() const SK_EXCLUDES(fLock); + skgpu::Mipmapped mipmapped() const SK_EXCLUDES(fLock); +#ifdef SK_DEBUG + GrBackendFormat backendFormat() SK_EXCLUDES(fLock); +#endif + + private: + mutable SkSpinlock fLock; + sk_sp fStableProxy SK_GUARDED_BY(fLock); + sk_sp fVolatileProxy SK_GUARDED_BY(fLock); + sk_sp fVolatileToStableCopyTask; + // The number of GrRenderTasks targeting the volatile proxy at creation time. If the + // proxy's target count increases it indicates additional writes and we must switch + // to using the stable copy. + const int fVolatileProxyTargetCount = 0; + }; + + mutable ProxyChooser fChooser; + skgpu::Swizzle fSwizzle; + GrSurfaceOrigin fOrigin; + + using INHERITED = SkImage_GpuBase; +}; + +#endif diff --git a/gfx/skia/skia/src/image/SkImage_GpuBase.cpp b/gfx/skia/skia/src/image/SkImage_GpuBase.cpp new file mode 100644 index 0000000000..903b03c838 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_GpuBase.cpp @@ -0,0 +1,360 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkImage_GpuBase.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPromiseImageTexture.h" +#include "include/core/SkSize.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/private/base/SkAssert.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/gpu/RefCntedCallback.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrImageContextPriv.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrResourceCache.h" +#include "src/gpu/ganesh/GrResourceProvider.h" +#include "src/gpu/ganesh/GrSurface.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/GrTexture.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/SurfaceContext.h" +#include "src/image/SkImage_Gpu.h" + +#include +#include +#include + +class GrContextThreadSafeProxy; +class SkImage; +enum SkColorType : int; +struct SkIRect; + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Log.h" +#endif + +SkImage_GpuBase::SkImage_GpuBase(sk_sp context, SkImageInfo info, uint32_t uniqueID) + : SkImage_Base(std::move(info), uniqueID) + , fContext(std::move(context)) {} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkImage_GpuBase::ValidateBackendTexture(const GrCaps* caps, const GrBackendTexture& tex, + GrColorType grCT, SkColorType ct, SkAlphaType at, + sk_sp cs) { + if (!tex.isValid()) { + return false; + } + SkColorInfo info(ct, at, cs); + if (!SkColorInfoIsValid(info)) { + return false; + } + GrBackendFormat backendFormat = tex.getBackendFormat(); + if (!backendFormat.isValid()) { + return false; + } + + return caps->areColorTypeAndFormatCompatible(grCT, backendFormat); +} + +bool SkImage_GpuBase::ValidateCompressedBackendTexture(const GrCaps* caps, + const GrBackendTexture& tex, + SkAlphaType at) { + if (!tex.isValid() || tex.width() <= 0 || tex.height() <= 0) { + return false; + } + + if (tex.width() > caps->maxTextureSize() || tex.height() > caps->maxTextureSize()) { + return false; + } + + if (at == kUnknown_SkAlphaType) { + return false; + } + + GrBackendFormat backendFormat = tex.getBackendFormat(); + if (!backendFormat.isValid()) { + return false; + } + + if (!caps->isFormatCompressed(backendFormat)) { + return false; + } + + return true; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkImage_GpuBase::getROPixels(GrDirectContext* dContext, + SkBitmap* dst, + CachingHint chint) const { + if (!fContext->priv().matches(dContext)) { + return false; + } + + const auto desc = SkBitmapCacheDesc::Make(this); + if (SkBitmapCache::Find(desc, dst)) { + SkASSERT(dst->isImmutable()); + SkASSERT(dst->getPixels()); + return true; + } + + SkBitmapCache::RecPtr rec = nullptr; + SkPixmap pmap; + if (kAllow_CachingHint == chint) { + rec = SkBitmapCache::Alloc(desc, this->imageInfo(), &pmap); + if (!rec) { + return false; + } + } else { + if (!dst->tryAllocPixels(this->imageInfo()) || !dst->peekPixels(&pmap)) { + return false; + } + } + + auto [view, ct] = this->asView(dContext, skgpu::Mipmapped::kNo); + if (!view) { + return false; + } + + GrColorInfo colorInfo(ct, this->alphaType(), this->refColorSpace()); + auto sContext = dContext->priv().makeSC(std::move(view), std::move(colorInfo)); + if (!sContext) { + return false; + } + + if (!sContext->readPixels(dContext, pmap, {0, 0})) { + return false; + } + + if (rec) { + SkBitmapCache::Add(std::move(rec), dst); + this->notifyAddedToRasterCache(); + } + return true; +} + +sk_sp SkImage_GpuBase::onMakeSubset(const SkIRect& subset, + GrDirectContext* direct) const { + if (!fContext->priv().matches(direct)) { + return nullptr; + } + + auto [view, ct] = this->asView(direct, skgpu::Mipmapped::kNo); + SkASSERT(view); + SkASSERT(ct == SkColorTypeToGrColorType(this->colorType())); + + skgpu::Budgeted isBudgeted = view.proxy()->isBudgeted(); + auto copyView = GrSurfaceProxyView::Copy(direct, + std::move(view), + skgpu::Mipmapped::kNo, + subset, + SkBackingFit::kExact, + isBudgeted, + /*label=*/"ImageGpuBase_MakeSubset"); + + if (!copyView) { + return nullptr; + } + + return sk_make_sp(sk_ref_sp(direct), + kNeedNewImageUniqueID, + std::move(copyView), + this->imageInfo().colorInfo()); +} + +#if defined(SK_GRAPHITE) +sk_sp SkImage_GpuBase::onMakeTextureImage(skgpu::graphite::Recorder*, + SkImage::RequiredImageProperties) const { + SKGPU_LOG_W("Cannot convert Ganesh-backed image to Graphite"); + return nullptr; +} + +sk_sp SkImage_GpuBase::onMakeSubset(const SkIRect&, + skgpu::graphite::Recorder*, + RequiredImageProperties) const { + SKGPU_LOG_W("Cannot convert Ganesh-backed image to Graphite"); + return nullptr; +} + +sk_sp SkImage_GpuBase::onMakeColorTypeAndColorSpace(SkColorType, + sk_sp, + skgpu::graphite::Recorder*, + RequiredImageProperties) const { + SKGPU_LOG_W("Cannot convert Ganesh-backed image to Graphite"); + return nullptr; +} +#endif + +bool SkImage_GpuBase::onReadPixels(GrDirectContext* dContext, + const SkImageInfo& dstInfo, + void* dstPixels, + size_t dstRB, + int srcX, + int srcY, + CachingHint) const { + if (!fContext->priv().matches(dContext) || + !SkImageInfoValidConversion(dstInfo, this->imageInfo())) { + return false; + } + + auto [view, ct] = this->asView(dContext, skgpu::Mipmapped::kNo); + SkASSERT(view); + + GrColorInfo colorInfo(ct, this->alphaType(), this->refColorSpace()); + auto sContext = dContext->priv().makeSC(std::move(view), colorInfo); + if (!sContext) { + return false; + } + + return sContext->readPixels(dContext, {dstInfo, dstPixels, dstRB}, {srcX, srcY}); +} + +bool SkImage_GpuBase::onIsValid(GrRecordingContext* context) const { + // The base class has already checked that 'context' isn't abandoned (if it's not nullptr) + if (fContext->priv().abandoned()) { + return false; + } + + if (context && !fContext->priv().matches(context)) { + return false; + } + + return true; +} + +sk_sp SkImage_GpuBase::MakePromiseImageLazyProxy( + GrContextThreadSafeProxy* tsp, + SkISize dimensions, + GrBackendFormat backendFormat, + skgpu::Mipmapped mipmapped, + PromiseImageTextureFulfillProc fulfillProc, + sk_sp releaseHelper) { + SkASSERT(tsp); + SkASSERT(!dimensions.isEmpty()); + SkASSERT(releaseHelper); + + if (!fulfillProc) { + return nullptr; + } + + if (mipmapped == skgpu::Mipmapped::kYes && + GrTextureTypeHasRestrictedSampling(backendFormat.textureType())) { + // It is invalid to have a GL_TEXTURE_EXTERNAL or GL_TEXTURE_RECTANGLE and have mips as + // well. + return nullptr; + } + + /** + * This class is the lazy instantiation callback for promise images. It manages calling the + * client's Fulfill and Release procs. It attempts to reuse a GrTexture instance in + * cases where the client provides the same SkPromiseImageTexture as Fulfill results for + * multiple SkImages. The created GrTexture is given a key based on a unique ID associated with + * the SkPromiseImageTexture. + * + * A key invalidation message is installed on the SkPromiseImageTexture so that the GrTexture + * is deleted once it can no longer be used to instantiate a proxy. + */ + class PromiseLazyInstantiateCallback { + public: + PromiseLazyInstantiateCallback(PromiseImageTextureFulfillProc fulfillProc, + sk_sp releaseHelper) + : fFulfillProc(fulfillProc), fReleaseHelper(std::move(releaseHelper)) {} + PromiseLazyInstantiateCallback(PromiseLazyInstantiateCallback&&) = default; + PromiseLazyInstantiateCallback(const PromiseLazyInstantiateCallback&) { + // Because we get wrapped in std::function we must be copyable. But we should never + // be copied. + SkASSERT(false); + } + PromiseLazyInstantiateCallback& operator=(PromiseLazyInstantiateCallback&&) = default; + PromiseLazyInstantiateCallback& operator=(const PromiseLazyInstantiateCallback&) { + SkASSERT(false); + return *this; + } + + ~PromiseLazyInstantiateCallback() { + // Our destructor can run on any thread. We trigger the unref of fTexture by message. + if (fTexture) { + GrResourceCache::ReturnResourceFromThread(std::move(fTexture), fTextureContextID); + } + } + + GrSurfaceProxy::LazyCallbackResult operator()(GrResourceProvider* resourceProvider, + const GrSurfaceProxy::LazySurfaceDesc&) { + // We use the unique key in a way that is unrelated to the SkImage-based key that the + // proxy may receive, hence kUnsynced. + static constexpr auto kKeySyncMode = + GrSurfaceProxy::LazyInstantiationKeyMode::kUnsynced; + + // In order to make the SkImage "thread safe" we rely on holding an extra ref to the + // texture in the callback and signalling the unref via a message to the resource cache. + // We need to extend the callback's lifetime to that of the proxy. + static constexpr auto kReleaseCallbackOnInstantiation = false; + + // Our proxy is getting instantiated for the second+ time. We are only allowed to call + // Fulfill once. So return our cached result. + if (fTexture) { + return {fTexture, kReleaseCallbackOnInstantiation, kKeySyncMode}; + } else if (fFulfillProcFailed) { + // We've already called fulfill and it failed. Our contract says that we should only + // call each callback once. + return {}; + } + + PromiseImageTextureContext textureContext = fReleaseHelper->context(); + sk_sp promiseTexture = fFulfillProc(textureContext); + + if (!promiseTexture) { + fFulfillProcFailed = true; + return {}; + } + + const GrBackendTexture& backendTexture = promiseTexture->backendTexture(); + if (!backendTexture.isValid()) { + return {}; + } + + fTexture = resourceProvider->wrapBackendTexture(backendTexture, + kBorrow_GrWrapOwnership, + GrWrapCacheable::kNo, + kRead_GrIOType); + if (!fTexture) { + return {}; + } + fTexture->setRelease(fReleaseHelper); + auto dContext = fTexture->getContext(); + fTextureContextID = dContext->directContextID(); + return {fTexture, kReleaseCallbackOnInstantiation, kKeySyncMode}; + } + + private: + PromiseImageTextureFulfillProc fFulfillProc; + sk_sp fReleaseHelper; + sk_sp fTexture; + GrDirectContext::DirectContextID fTextureContextID; + bool fFulfillProcFailed = false; + } callback(fulfillProc, std::move(releaseHelper)); + + return GrProxyProvider::CreatePromiseProxy(tsp, std::move(callback), backendFormat, dimensions, + mipmapped); +} diff --git a/gfx/skia/skia/src/image/SkImage_GpuBase.h b/gfx/skia/skia/src/image/SkImage_GpuBase.h new file mode 100644 index 0000000000..657ec4cf2c --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_GpuBase.h @@ -0,0 +1,90 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImage_GpuBase_DEFINED +#define SkImage_GpuBase_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/private/gpu/ganesh/GrImageContext.h" +#include "src/image/SkImage_Base.h" + +#include +#include + +class GrBackendFormat; +class GrBackendTexture; +class GrCaps; +class GrContextThreadSafeProxy; +class GrDirectContext; +class GrRecordingContext; +class GrTextureProxy; +class SkBitmap; +class SkColorSpace; +class SkImage; +enum SkAlphaType : int; +enum SkColorType : int; +enum class GrColorType; +struct SkIRect; +struct SkISize; +struct SkImageInfo; +namespace skgpu { +enum class Mipmapped : bool; +class RefCntedCallback; +} + +class SkImage_GpuBase : public SkImage_Base { +public: + GrImageContext* context() const final { return fContext.get(); } + + bool getROPixels(GrDirectContext*, SkBitmap*, CachingHint) const final; + sk_sp onMakeSubset(const SkIRect& subset, GrDirectContext*) const final; + + bool onReadPixels(GrDirectContext *dContext, + const SkImageInfo& dstInfo, + void* dstPixels, + size_t dstRB, + int srcX, + int srcY, + CachingHint) const override; + + bool onIsValid(GrRecordingContext*) const final; + + static bool ValidateBackendTexture(const GrCaps*, const GrBackendTexture& tex, + GrColorType grCT, SkColorType ct, SkAlphaType at, + sk_sp cs); + static bool ValidateCompressedBackendTexture(const GrCaps*, const GrBackendTexture& tex, + SkAlphaType); + + // Helper for making a lazy proxy for a promise image. + // PromiseImageTextureFulfillProc must not be null. + static sk_sp MakePromiseImageLazyProxy( + GrContextThreadSafeProxy*, + SkISize dimensions, + GrBackendFormat, + skgpu::Mipmapped, + PromiseImageTextureFulfillProc, + sk_sp releaseHelper); + +protected: + SkImage_GpuBase(sk_sp, SkImageInfo, uint32_t uniqueID); + + sk_sp fContext; + +#if defined(SK_GRAPHITE) + sk_sp onMakeTextureImage(skgpu::graphite::Recorder*, + RequiredImageProperties) const final; + sk_sp onMakeSubset(const SkIRect& subset, + skgpu::graphite::Recorder*, + RequiredImageProperties) const final; + sk_sp onMakeColorTypeAndColorSpace(SkColorType, + sk_sp, + skgpu::graphite::Recorder*, + RequiredImageProperties) const final; +#endif +}; + +#endif diff --git a/gfx/skia/skia/src/image/SkImage_GpuYUVA.cpp b/gfx/skia/skia/src/image/SkImage_GpuYUVA.cpp new file mode 100644 index 0000000000..a069c6a5a5 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_GpuYUVA.cpp @@ -0,0 +1,440 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkImage_GpuYUVA.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkSize.h" +#include "include/core/SkSurface.h" +#include "include/core/SkYUVAInfo.h" +#include "include/core/SkYUVAPixmaps.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrBackendSurface.h" // IWYU pragma: keep +#include "include/gpu/GrContextThreadSafeProxy.h" +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/gpu/GrYUVABackendTextures.h" +#include "include/private/base/SkAssert.h" +#include "include/private/gpu/ganesh/GrImageContext.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkSamplingPriv.h" +#include "src/gpu/RefCntedCallback.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/Swizzle.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrImageContextPriv.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSamplerState.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrBicubicEffect.h" +#include "src/gpu/ganesh/effects/GrYUVtoRGBEffect.h" +#include "src/image/SkImage_Base.h" + +#include +#include + +enum class SkTileMode; +struct SkRect; + +static constexpr auto kAssumedColorType = kRGBA_8888_SkColorType; + +SkImage_GpuYUVA::SkImage_GpuYUVA(sk_sp context, + uint32_t uniqueID, + GrYUVATextureProxies proxies, + sk_sp imageColorSpace) + : INHERITED(std::move(context), + SkImageInfo::Make(proxies.yuvaInfo().dimensions(), + kAssumedColorType, + // If an alpha channel is present we always use kPremul. This + // is because, although the planar data is always un-premul, + // the final interleaved RGBA sample produced in the shader + // is premul (and similar if flattened via asView). + proxies.yuvaInfo().hasAlpha() ? kPremul_SkAlphaType + : kOpaque_SkAlphaType, + std::move(imageColorSpace)), + uniqueID) + , fYUVAProxies(std::move(proxies)) { + // The caller should have checked this, just verifying. + SkASSERT(fYUVAProxies.isValid()); +} + +// For onMakeColorTypeAndColorSpace() / onReinterpretColorSpace() +SkImage_GpuYUVA::SkImage_GpuYUVA(sk_sp context, + const SkImage_GpuYUVA* image, + sk_sp targetCS, + ColorSpaceMode csMode) + : INHERITED(std::move(context), + image->imageInfo().makeColorSpace(std::move(targetCS)), + kNeedNewImageUniqueID) + , fYUVAProxies(image->fYUVAProxies) + // If we're *reinterpreting* in a new color space, leave fFromColorSpace null. + // If we're *converting* to a new color space, it must be non-null, so turn null into sRGB. + , fFromColorSpace(csMode == ColorSpaceMode::kReinterpret + ? nullptr + : (image->colorSpace() ? image->refColorSpace() + : SkColorSpace::MakeSRGB())) {} + +bool SkImage_GpuYUVA::setupMipmapsForPlanes(GrRecordingContext* context) const { + if (!context || !fContext->priv().matches(context)) { + return false; + } + if (!context->priv().caps()->mipmapSupport()) { + // We succeed in this case by doing nothing. + return true; + } + int n = fYUVAProxies.yuvaInfo().numPlanes(); + sk_sp newProxies[4]; + for (int i = 0; i < n; ++i) { + auto* t = fYUVAProxies.proxy(i)->asTextureProxy(); + if (t->mipmapped() == GrMipmapped::kNo && (t->width() > 1 || t->height() > 1)) { + auto newView = GrCopyBaseMipMapToView(context, fYUVAProxies.makeView(i)); + if (!newView) { + return false; + } + SkASSERT(newView.swizzle() == fYUVAProxies.makeView(i).swizzle()); + newProxies[i] = newView.detachProxy(); + } else { + newProxies[i] = fYUVAProxies.refProxy(i); + } + } + fYUVAProxies = GrYUVATextureProxies(fYUVAProxies.yuvaInfo(), + newProxies, + fYUVAProxies.textureOrigin()); + SkASSERT(fYUVAProxies.isValid()); + return true; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +GrSemaphoresSubmitted SkImage_GpuYUVA::onFlush(GrDirectContext* dContext, + const GrFlushInfo& info) const { + if (!fContext->priv().matches(dContext) || dContext->abandoned()) { + if (info.fSubmittedProc) { + info.fSubmittedProc(info.fSubmittedContext, false); + } + if (info.fFinishedProc) { + info.fFinishedProc(info.fFinishedContext); + } + return GrSemaphoresSubmitted::kNo; + } + + GrSurfaceProxy* proxies[SkYUVAInfo::kMaxPlanes] = {}; + size_t numProxies = fYUVAProxies.numPlanes(); + for (size_t i = 0; i < numProxies; ++i) { + proxies[i] = fYUVAProxies.proxy(i); + } + return dContext->priv().flushSurfaces({proxies, numProxies}, + SkSurface::BackendSurfaceAccess::kNoAccess, + info); +} + +bool SkImage_GpuYUVA::onHasMipmaps() const { return fYUVAProxies.mipmapped() == GrMipmapped::kYes; } + +size_t SkImage_GpuYUVA::onTextureSize() const { + size_t size = 0; + for (int i = 0; i < fYUVAProxies.numPlanes(); ++i) { + size += fYUVAProxies.proxy(i)->gpuMemorySize(); + } + return size; +} + +sk_sp SkImage_GpuYUVA::onMakeColorTypeAndColorSpace(SkColorType, + sk_sp targetCS, + GrDirectContext* direct) const { + // We explicitly ignore color type changes, for now. + + // we may need a mutex here but for now we expect usage to be in a single thread + if (fOnMakeColorSpaceTarget && + SkColorSpace::Equals(targetCS.get(), fOnMakeColorSpaceTarget.get())) { + return fOnMakeColorSpaceResult; + } + sk_sp result = sk_sp( + new SkImage_GpuYUVA(sk_ref_sp(direct), this, targetCS, ColorSpaceMode::kConvert)); + if (result) { + fOnMakeColorSpaceTarget = targetCS; + fOnMakeColorSpaceResult = result; + } + return result; +} + +sk_sp SkImage_GpuYUVA::onReinterpretColorSpace(sk_sp newCS) const { + return sk_sp( + new SkImage_GpuYUVA(fContext, this, std::move(newCS), ColorSpaceMode::kReinterpret)); +} + +std::tuple SkImage_GpuYUVA::onAsView( + GrRecordingContext* rContext, + GrMipmapped mipmapped, + GrImageTexGenPolicy) const { + if (!fContext->priv().matches(rContext)) { + return {}; + } + auto sfc = rContext->priv().makeSFC(this->imageInfo(), + "Image_GpuYUVA_ReinterpretColorSpace", + SkBackingFit::kExact, + /*sample count*/ 1, + mipmapped, + GrProtected::kNo, + kTopLeft_GrSurfaceOrigin, + skgpu::Budgeted::kYes); + if (!sfc) { + return {}; + } + + const GrCaps& caps = *rContext->priv().caps(); + auto fp = GrYUVtoRGBEffect::Make(fYUVAProxies, GrSamplerState::Filter::kNearest, caps); + if (fFromColorSpace) { + fp = GrColorSpaceXformEffect::Make(std::move(fp), + fFromColorSpace.get(), this->alphaType(), + this->colorSpace() , this->alphaType()); + } + sfc->fillWithFP(std::move(fp)); + + return {sfc->readSurfaceView(), sfc->colorInfo().colorType()}; +} + +std::unique_ptr SkImage_GpuYUVA::onAsFragmentProcessor( + GrRecordingContext* context, + SkSamplingOptions sampling, + const SkTileMode tileModes[2], + const SkMatrix& m, + const SkRect* subset, + const SkRect* domain) const { + if (!fContext->priv().matches(context)) { + return {}; + } + // At least for now we do not attempt aniso filtering on YUVA images. + if (sampling.isAniso()) { + sampling = SkSamplingPriv::AnisoFallback(fYUVAProxies.mipmapped() == GrMipmapped::kYes); + } + + auto wmx = SkTileModeToWrapMode(tileModes[0]); + auto wmy = SkTileModeToWrapMode(tileModes[1]); + GrSamplerState sampler(wmx, wmy, sampling.filter, sampling.mipmap); + if (sampler.mipmapped() == GrMipmapped::kYes && !this->setupMipmapsForPlanes(context)) { + sampler = GrSamplerState(sampler.wrapModeX(), + sampler.wrapModeY(), + sampler.filter(), + GrSamplerState::MipmapMode::kNone); + } + + const auto& yuvM = sampling.useCubic ? SkMatrix::I() : m; + auto fp = GrYUVtoRGBEffect::Make(fYUVAProxies, + sampler, + *context->priv().caps(), + yuvM, + subset, + domain); + if (sampling.useCubic) { + fp = GrBicubicEffect::Make(std::move(fp), + this->alphaType(), + m, + sampling.cubic, + GrBicubicEffect::Direction::kXY); + } + if (fFromColorSpace) { + fp = GrColorSpaceXformEffect::Make(std::move(fp), + fFromColorSpace.get(), this->alphaType(), + this->colorSpace() , this->alphaType()); + } + return fp; +} + +////////////////////////////////////////////////////////////////////////////////////////////////// +sk_sp SkImage::MakeFromYUVATextures(GrRecordingContext* context, + const GrYUVABackendTextures& yuvaTextures) { + return SkImage::MakeFromYUVATextures(context, yuvaTextures, nullptr, nullptr, nullptr); +} + +sk_sp SkImage::MakeFromYUVATextures(GrRecordingContext* context, + const GrYUVABackendTextures& yuvaTextures, + sk_sp imageColorSpace, + TextureReleaseProc textureReleaseProc, + ReleaseContext releaseContext) { + auto releaseHelper = skgpu::RefCntedCallback::Make(textureReleaseProc, releaseContext); + + GrProxyProvider* proxyProvider = context->priv().proxyProvider(); + int numPlanes = yuvaTextures.yuvaInfo().numPlanes(); + sk_sp proxies[SkYUVAInfo::kMaxPlanes]; + for (int plane = 0; plane < numPlanes; ++plane) { + proxies[plane] = proxyProvider->wrapBackendTexture(yuvaTextures.texture(plane), + kBorrow_GrWrapOwnership, + GrWrapCacheable::kNo, + kRead_GrIOType, + releaseHelper); + if (!proxies[plane]) { + return {}; + } + } + GrYUVATextureProxies yuvaProxies(yuvaTextures.yuvaInfo(), + proxies, + yuvaTextures.textureOrigin()); + + if (!yuvaProxies.isValid()) { + return nullptr; + } + + return sk_make_sp(sk_ref_sp(context), + kNeedNewImageUniqueID, + yuvaProxies, + imageColorSpace); +} + +sk_sp SkImage::MakeFromYUVAPixmaps(GrRecordingContext* context, + const SkYUVAPixmaps& pixmaps, + GrMipmapped buildMips, + bool limitToMaxTextureSize) { + return SkImage::MakeFromYUVAPixmaps(context, pixmaps, buildMips, limitToMaxTextureSize, + nullptr); +} + +sk_sp SkImage::MakeFromYUVAPixmaps(GrRecordingContext* context, + const SkYUVAPixmaps& pixmaps, + GrMipmapped buildMips, + bool limitToMaxTextureSize, + sk_sp imageColorSpace) { + if (!context) { + return nullptr; // until we impl this for raster backend + } + + if (!pixmaps.isValid()) { + return nullptr; + } + + if (!context->priv().caps()->mipmapSupport()) { + buildMips = GrMipmapped::kNo; + } + + // Resize the pixmaps if necessary. + int numPlanes = pixmaps.numPlanes(); + int maxTextureSize = context->priv().caps()->maxTextureSize(); + int maxDim = std::max(pixmaps.yuvaInfo().width(), pixmaps.yuvaInfo().height()); + + SkYUVAPixmaps tempPixmaps; + const SkYUVAPixmaps* pixmapsToUpload = &pixmaps; + // We assume no plane is larger than the image size (and at least one plane is as big). + if (maxDim > maxTextureSize) { + if (!limitToMaxTextureSize) { + return nullptr; + } + float scale = static_cast(maxTextureSize)/maxDim; + SkISize newDimensions = { + std::min(static_cast(pixmaps.yuvaInfo().width() *scale), maxTextureSize), + std::min(static_cast(pixmaps.yuvaInfo().height()*scale), maxTextureSize) + }; + SkYUVAInfo newInfo = pixmaps.yuvaInfo().makeDimensions(newDimensions); + SkYUVAPixmapInfo newPixmapInfo(newInfo, pixmaps.dataType(), /*row bytes*/ nullptr); + tempPixmaps = SkYUVAPixmaps::Allocate(newPixmapInfo); + SkSamplingOptions sampling(SkFilterMode::kLinear); + if (!tempPixmaps.isValid()) { + return nullptr; + } + for (int i = 0; i < numPlanes; ++i) { + if (!pixmaps.plane(i).scalePixels(tempPixmaps.plane(i), sampling)) { + return nullptr; + } + } + pixmapsToUpload = &tempPixmaps; + } + + // Convert to texture proxies. + GrSurfaceProxyView views[SkYUVAInfo::kMaxPlanes]; + GrColorType pixmapColorTypes[SkYUVAInfo::kMaxPlanes]; + for (int i = 0; i < numPlanes; ++i) { + // Turn the pixmap into a GrTextureProxy + SkBitmap bmp; + bmp.installPixels(pixmapsToUpload->plane(i)); + std::tie(views[i], std::ignore) = GrMakeUncachedBitmapProxyView(context, bmp, buildMips); + if (!views[i]) { + return nullptr; + } + pixmapColorTypes[i] = SkColorTypeToGrColorType(bmp.colorType()); + } + + GrYUVATextureProxies yuvaProxies(pixmapsToUpload->yuvaInfo(), views, pixmapColorTypes); + SkASSERT(yuvaProxies.isValid()); + return sk_make_sp(sk_ref_sp(context), + kNeedNewImageUniqueID, + std::move(yuvaProxies), + std::move(imageColorSpace)); +} + +///////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImage::MakePromiseYUVATexture(sk_sp threadSafeProxy, + const GrYUVABackendTextureInfo& backendTextureInfo, + sk_sp imageColorSpace, + PromiseImageTextureFulfillProc textureFulfillProc, + PromiseImageTextureReleaseProc textureReleaseProc, + PromiseImageTextureContext textureContexts[]) { + if (!backendTextureInfo.isValid()) { + return nullptr; + } + + SkISize planeDimensions[SkYUVAInfo::kMaxPlanes]; + int n = backendTextureInfo.yuvaInfo().planeDimensions(planeDimensions); + + // Our contract is that we will always call the release proc even on failure. + // We use the helper to convey the context, so we need to ensure make doesn't fail. + textureReleaseProc = textureReleaseProc ? textureReleaseProc : [](void*) {}; + sk_sp releaseHelpers[4]; + for (int i = 0; i < n; ++i) { + releaseHelpers[i] = skgpu::RefCntedCallback::Make(textureReleaseProc, textureContexts[i]); + } + + if (!threadSafeProxy) { + return nullptr; + } + + SkAlphaType at = backendTextureInfo.yuvaInfo().hasAlpha() ? kPremul_SkAlphaType + : kOpaque_SkAlphaType; + SkImageInfo info = SkImageInfo::Make(backendTextureInfo.yuvaInfo().dimensions(), + kAssumedColorType, at, imageColorSpace); + if (!SkImageInfoIsValid(info)) { + return nullptr; + } + + // Make a lazy proxy for each plane and wrap in a view. + sk_sp proxies[4]; + for (int i = 0; i < n; ++i) { + proxies[i] = SkImage_GpuBase::MakePromiseImageLazyProxy(threadSafeProxy.get(), + planeDimensions[i], + backendTextureInfo.planeFormat(i), + GrMipmapped::kNo, + textureFulfillProc, + std::move(releaseHelpers[i])); + if (!proxies[i]) { + return nullptr; + } + } + GrYUVATextureProxies yuvaTextureProxies(backendTextureInfo.yuvaInfo(), + proxies, + backendTextureInfo.textureOrigin()); + SkASSERT(yuvaTextureProxies.isValid()); + sk_sp ctx(GrImageContextPriv::MakeForPromiseImage(std::move(threadSafeProxy))); + return sk_make_sp(std::move(ctx), + kNeedNewImageUniqueID, + std::move(yuvaTextureProxies), + std::move(imageColorSpace)); +} diff --git a/gfx/skia/skia/src/image/SkImage_GpuYUVA.h b/gfx/skia/skia/src/image/SkImage_GpuYUVA.h new file mode 100644 index 0000000000..c71a8b5a0e --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_GpuYUVA.h @@ -0,0 +1,105 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImage_GpuYUVA_DEFINED +#define SkImage_GpuYUVA_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/core/SkImage.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "src/gpu/ganesh/GrYUVATextureProxies.h" +#include "src/image/SkImage_Base.h" +#include "src/image/SkImage_GpuBase.h" + +#include +#include +#include +#include + +class GrDirectContext; +class GrFragmentProcessor; +class GrImageContext; +class GrRecordingContext; +class GrSurfaceProxyView; +class SkMatrix; +enum SkColorType : int; +enum class GrColorType; +enum class GrImageTexGenPolicy : int; +enum class GrSemaphoresSubmitted : bool; +enum class SkTileMode; +struct GrFlushInfo; +struct SkRect; + +namespace skgpu { +enum class Mipmapped : bool; +} + +// Wraps the 1 to 4 planes of a YUVA image for consumption by the GPU. +// Initially any direct rendering will be done by passing the individual planes to a shader. +// Once any method requests a flattened image (e.g., onReadPixels), the flattened RGB +// proxy will be stored and used for any future rendering. +class SkImage_GpuYUVA final : public SkImage_GpuBase { +public: + SkImage_GpuYUVA(sk_sp, + uint32_t uniqueID, + GrYUVATextureProxies proxies, + sk_sp); + + bool onHasMipmaps() const override; + + GrSemaphoresSubmitted onFlush(GrDirectContext*, const GrFlushInfo&) const override; + + SkImage_Base::Type type() const override { return SkImage_Base::Type::kGaneshYUVA; } + + size_t onTextureSize() const override; + + using SkImage_GpuBase::onMakeColorTypeAndColorSpace; + sk_sp onMakeColorTypeAndColorSpace(SkColorType, sk_sp, + GrDirectContext*) const final; + + sk_sp onReinterpretColorSpace(sk_sp) const final; + + bool setupMipmapsForPlanes(GrRecordingContext*) const; + +private: + enum class ColorSpaceMode { + kConvert, + kReinterpret, + }; + SkImage_GpuYUVA(sk_sp, + const SkImage_GpuYUVA* image, + sk_sp targetCS, + ColorSpaceMode csMode); + + std::tuple onAsView(GrRecordingContext*, + skgpu::Mipmapped, + GrImageTexGenPolicy) const override; + + std::unique_ptr onAsFragmentProcessor(GrRecordingContext*, + SkSamplingOptions, + const SkTileMode[2], + const SkMatrix&, + const SkRect*, + const SkRect*) const override; + + mutable GrYUVATextureProxies fYUVAProxies; + + // If this is non-null then the planar data should be converted from fFromColorSpace to + // this->colorSpace(). Otherwise we assume the planar data (post YUV->RGB conversion) is already + // in this->colorSpace(). + const sk_sp fFromColorSpace; + + // Repeated calls to onMakeColorSpace will result in a proliferation of unique IDs and + // SkImage_GpuYUVA instances. Cache the result of the last successful onMakeColorSpace call. + mutable sk_sp fOnMakeColorSpaceTarget; + mutable sk_sp fOnMakeColorSpaceResult; + + using INHERITED = SkImage_GpuBase; +}; + +#endif diff --git a/gfx/skia/skia/src/image/SkImage_Lazy.cpp b/gfx/skia/skia/src/image/SkImage_Lazy.cpp new file mode 100644 index 0000000000..6597795462 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Lazy.cpp @@ -0,0 +1,689 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkImage_Lazy.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkData.h" +#include "include/core/SkImageGenerator.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkSize.h" +#include "include/core/SkYUVAInfo.h" +#include "src/core/SkBitmapCache.h" +#include "src/core/SkCachedData.h" +#include "src/core/SkNextID.h" +#include "src/core/SkResourceCache.h" +#include "src/core/SkYUVPlanesCache.h" + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrContextOptions.h" +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/gpu/ResourceKey.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/Swizzle.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrImageInfo.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrSamplerState.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/gpu/ganesh/GrYUVATextureProxies.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/SurfaceContext.h" +#include "src/gpu/ganesh/SurfaceFillContext.h" +#include "src/gpu/ganesh/effects/GrYUVtoRGBEffect.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/TextureUtils.h" +#endif + +#include + +class SkMatrix; +enum SkColorType : int; +enum class SkTileMode; + +// Ref-counted tuple(SkImageGenerator, SkMutex) which allows sharing one generator among N images +class SharedGenerator final : public SkNVRefCnt { +public: + static sk_sp Make(std::unique_ptr gen) { + return gen ? sk_sp(new SharedGenerator(std::move(gen))) : nullptr; + } + + // This is thread safe. It is a const field set in the constructor. + const SkImageInfo& getInfo() { return fGenerator->getInfo(); } + +private: + explicit SharedGenerator(std::unique_ptr gen) + : fGenerator(std::move(gen)) { + SkASSERT(fGenerator); + } + + friend class ScopedGenerator; + friend class SkImage_Lazy; + + std::unique_ptr fGenerator; + SkMutex fMutex; +}; + +/////////////////////////////////////////////////////////////////////////////// + +SkImage_Lazy::Validator::Validator(sk_sp gen, const SkColorType* colorType, + sk_sp colorSpace) + : fSharedGenerator(std::move(gen)) { + if (!fSharedGenerator) { + return; + } + + // The following generator accessors are safe without acquiring the mutex (const getters). + // TODO: refactor to use a ScopedGenerator instead, for clarity. + fInfo = fSharedGenerator->fGenerator->getInfo(); + if (fInfo.isEmpty()) { + fSharedGenerator.reset(); + return; + } + + fUniqueID = fSharedGenerator->fGenerator->uniqueID(); + + if (colorType && (*colorType == fInfo.colorType())) { + colorType = nullptr; + } + + if (colorType || colorSpace) { + if (colorType) { + fInfo = fInfo.makeColorType(*colorType); + } + if (colorSpace) { + fInfo = fInfo.makeColorSpace(colorSpace); + } + fUniqueID = SkNextID::ImageID(); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +// Helper for exclusive access to a shared generator. +class SkImage_Lazy::ScopedGenerator { +public: + ScopedGenerator(const sk_sp& gen) + : fSharedGenerator(gen) + , fAutoAquire(gen->fMutex) {} + + SkImageGenerator* operator->() const { + fSharedGenerator->fMutex.assertHeld(); + return fSharedGenerator->fGenerator.get(); + } + + operator SkImageGenerator*() const { + fSharedGenerator->fMutex.assertHeld(); + return fSharedGenerator->fGenerator.get(); + } + +private: + const sk_sp& fSharedGenerator; + SkAutoMutexExclusive fAutoAquire; +}; + +/////////////////////////////////////////////////////////////////////////////// + +SkImage_Lazy::SkImage_Lazy(Validator* validator) + : SkImage_Base(validator->fInfo, validator->fUniqueID) + , fSharedGenerator(std::move(validator->fSharedGenerator)) +{ + SkASSERT(fSharedGenerator); +} + + +////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkImage_Lazy::getROPixels(GrDirectContext* ctx, SkBitmap* bitmap, + SkImage::CachingHint chint) const { + auto check_output_bitmap = [bitmap]() { + SkASSERT(bitmap->isImmutable()); + SkASSERT(bitmap->getPixels()); + (void)bitmap; + }; + + auto desc = SkBitmapCacheDesc::Make(this); + if (SkBitmapCache::Find(desc, bitmap)) { + check_output_bitmap(); + return true; + } + + if (SkImage::kAllow_CachingHint == chint) { + SkPixmap pmap; + SkBitmapCache::RecPtr cacheRec = SkBitmapCache::Alloc(desc, this->imageInfo(), &pmap); + if (!cacheRec) { + return false; + } + bool success = false; + { // make sure ScopedGenerator goes out of scope before we try readPixelsProxy + success = ScopedGenerator(fSharedGenerator)->getPixels(pmap); + } + if (!success && !this->readPixelsProxy(ctx, pmap)) { + return false; + } + SkBitmapCache::Add(std::move(cacheRec), bitmap); + this->notifyAddedToRasterCache(); + } else { + if (!bitmap->tryAllocPixels(this->imageInfo())) { + return false; + } + bool success = false; + { // make sure ScopedGenerator goes out of scope before we try readPixelsProxy + success = ScopedGenerator(fSharedGenerator)->getPixels(bitmap->pixmap()); + } + if (!success && !this->readPixelsProxy(ctx, bitmap->pixmap())) { + return false; + } + bitmap->setImmutable(); + } + check_output_bitmap(); + return true; +} + +bool SkImage_Lazy::readPixelsProxy(GrDirectContext* ctx, const SkPixmap& pixmap) const { +#if defined(SK_GANESH) + if (!ctx) { + return false; + } + GrSurfaceProxyView view = this->lockTextureProxyView(ctx, + GrImageTexGenPolicy::kDraw, + GrMipmapped::kNo); + + if (!view) { + return false; + } + + GrColorType ct = this->colorTypeOfLockTextureProxy(ctx->priv().caps()); + GrColorInfo colorInfo(ct, this->alphaType(), this->refColorSpace()); + auto sContext = ctx->priv().makeSC(std::move(view), colorInfo); + if (!sContext) { + return false; + } + size_t rowBytes = this->imageInfo().minRowBytes(); + return sContext->readPixels(ctx, {this->imageInfo(), pixmap.writable_addr(), rowBytes}, {0, 0}); +#else + return false; +#endif // defined(SK_GANESH) +} + +////////////////////////////////////////////////////////////////////////////////////////////////// + +bool SkImage_Lazy::onReadPixels(GrDirectContext* dContext, + const SkImageInfo& dstInfo, + void* dstPixels, + size_t dstRB, + int srcX, + int srcY, + CachingHint chint) const { + SkBitmap bm; + if (this->getROPixels(dContext, &bm, chint)) { + return bm.readPixels(dstInfo, dstPixels, dstRB, srcX, srcY); + } + return false; +} + +sk_sp SkImage_Lazy::onRefEncoded() const { + // check that we aren't a subset or colortype/etc modification of the original + if (fSharedGenerator->fGenerator->uniqueID() == this->uniqueID()) { + ScopedGenerator generator(fSharedGenerator); + return generator->refEncodedData(); + } + return nullptr; +} + +bool SkImage_Lazy::onIsValid(GrRecordingContext* context) const { + ScopedGenerator generator(fSharedGenerator); + return generator->isValid(context); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImage_Lazy::onMakeSubset(const SkIRect& subset, GrDirectContext* direct) const { + // TODO: can we do this more efficiently, by telling the generator we want to + // "realize" a subset? + +#if defined(SK_GANESH) + auto pixels = direct ? this->makeTextureImage(direct) + : this->makeRasterImage(); +#else + auto pixels = this->makeRasterImage(); +#endif + return pixels ? pixels->makeSubset(subset, direct) : nullptr; +} + +#if defined(SK_GRAPHITE) + +sk_sp SkImage_Lazy::onMakeSubset(const SkIRect& subset, + skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProperties) const { + // TODO: can we do this more efficiently, by telling the generator we want to + // "realize" a subset? + + sk_sp nonLazyImg = recorder ? this->makeTextureImage(recorder, requiredProperties) + : this->makeRasterImage(); + + return nonLazyImg ? nonLazyImg->makeSubset(subset, recorder, requiredProperties) : nullptr; +} + +#endif // SK_GRAPHITE + +sk_sp SkImage_Lazy::onMakeColorTypeAndColorSpace(SkColorType targetCT, + sk_sp targetCS, + GrDirectContext*) const { + SkAutoMutexExclusive autoAquire(fOnMakeColorTypeAndSpaceMutex); + if (fOnMakeColorTypeAndSpaceResult && + targetCT == fOnMakeColorTypeAndSpaceResult->colorType() && + SkColorSpace::Equals(targetCS.get(), fOnMakeColorTypeAndSpaceResult->colorSpace())) { + return fOnMakeColorTypeAndSpaceResult; + } + Validator validator(fSharedGenerator, &targetCT, targetCS); + sk_sp result = validator ? sk_sp(new SkImage_Lazy(&validator)) : nullptr; + if (result) { + fOnMakeColorTypeAndSpaceResult = result; + } + return result; +} + +sk_sp SkImage_Lazy::onReinterpretColorSpace(sk_sp newCS) const { + // TODO: The correct thing is to clone the generator, and modify its color space. That's hard, + // because we don't have a clone method, and generator is public (and derived-from by clients). + // So do the simple/inefficient thing here, and fallback to raster when this is called. + + // We allocate the bitmap with the new color space, then generate the image using the original. + SkBitmap bitmap; + if (bitmap.tryAllocPixels(this->imageInfo().makeColorSpace(std::move(newCS)))) { + SkPixmap pixmap = bitmap.pixmap(); + pixmap.setColorSpace(this->refColorSpace()); + if (ScopedGenerator(fSharedGenerator)->getPixels(pixmap)) { + bitmap.setImmutable(); + return bitmap.asImage(); + } + } + return nullptr; +} + +sk_sp SkImage::MakeFromGenerator(std::unique_ptr generator) { + SkImage_Lazy::Validator + validator(SharedGenerator::Make(std::move(generator)), nullptr, nullptr); + + return validator ? sk_make_sp(&validator) : nullptr; +} + +#if defined(SK_GANESH) + +std::tuple SkImage_Lazy::onAsView( + GrRecordingContext* context, + GrMipmapped mipmapped, + GrImageTexGenPolicy policy) const { + GrColorType ct = this->colorTypeOfLockTextureProxy(context->priv().caps()); + return {this->lockTextureProxyView(context, policy, mipmapped), ct}; +} + +std::unique_ptr SkImage_Lazy::onAsFragmentProcessor( + GrRecordingContext* rContext, + SkSamplingOptions sampling, + const SkTileMode tileModes[2], + const SkMatrix& m, + const SkRect* subset, + const SkRect* domain) const { + // TODO: If the CPU data is extracted as planes return a FP that reconstructs the image from + // the planes. + auto mm = sampling.mipmap == SkMipmapMode::kNone ? GrMipmapped::kNo : GrMipmapped::kYes; + return MakeFragmentProcessorFromView(rContext, + std::get<0>(this->asView(rContext, mm)), + this->alphaType(), + sampling, + tileModes, + m, + subset, + domain); +} + +GrSurfaceProxyView SkImage_Lazy::textureProxyViewFromPlanes(GrRecordingContext* ctx, + skgpu::Budgeted budgeted) const { + SkYUVAPixmapInfo::SupportedDataTypes supportedDataTypes(*ctx); + SkYUVAPixmaps yuvaPixmaps; + sk_sp dataStorage = this->getPlanes(supportedDataTypes, &yuvaPixmaps); + if (!dataStorage) { + return {}; + } + + GrSurfaceProxyView views[SkYUVAInfo::kMaxPlanes]; + GrColorType pixmapColorTypes[SkYUVAInfo::kMaxPlanes]; + for (int i = 0; i < yuvaPixmaps.numPlanes(); ++i) { + // If the sizes of the components are not all the same we choose to create exact-match + // textures for the smaller ones rather than add a texture domain to the draw. + // TODO: revisit this decision to improve texture reuse? + SkBackingFit fit = yuvaPixmaps.plane(i).dimensions() == this->dimensions() + ? SkBackingFit::kApprox + : SkBackingFit::kExact; + + // We grab a ref to cached yuv data. When the SkBitmap we create below goes away it will + // call releaseProc which will release this ref. + // DDL TODO: Currently we end up creating a lazy proxy that will hold onto a ref to the + // SkImage in its lambda. This means that we'll keep the ref on the YUV data around for the + // life time of the proxy and not just upload. For non-DDL draws we should look into + // releasing this SkImage after uploads (by deleting the lambda after instantiation). + auto releaseProc = [](void*, void* data) { + auto cachedData = static_cast(data); + SkASSERT(cachedData); + cachedData->unref(); + }; + SkBitmap bitmap; + bitmap.installPixels(yuvaPixmaps.plane(i).info(), + yuvaPixmaps.plane(i).writable_addr(), + yuvaPixmaps.plane(i).rowBytes(), + releaseProc, + SkRef(dataStorage.get())); + bitmap.setImmutable(); + + std::tie(views[i], std::ignore) = GrMakeUncachedBitmapProxyView(ctx, + bitmap, + GrMipmapped::kNo, + fit); + if (!views[i]) { + return {}; + } + pixmapColorTypes[i] = SkColorTypeToGrColorType(bitmap.colorType()); + } + + // TODO: investigate preallocating mip maps here + GrImageInfo info(SkColorTypeToGrColorType(this->colorType()), + kPremul_SkAlphaType, + /*color space*/ nullptr, + this->dimensions()); + + auto sfc = ctx->priv().makeSFC(info, + "ImageLazy_TextureProxyViewFromPlanes", + SkBackingFit::kExact, + 1, + GrMipmapped::kNo, + GrProtected::kNo, + kTopLeft_GrSurfaceOrigin, + budgeted); + if (!sfc) { + return {}; + } + + GrYUVATextureProxies yuvaProxies(yuvaPixmaps.yuvaInfo(), views, pixmapColorTypes); + SkAssertResult(yuvaProxies.isValid()); + + std::unique_ptr fp = GrYUVtoRGBEffect::Make( + yuvaProxies, + GrSamplerState::Filter::kNearest, + *ctx->priv().caps()); + + // The pixels after yuv->rgb will be in the generator's color space. + // If onMakeColorTypeAndColorSpace has been called then this will not match this image's + // color space. To correct this, apply a color space conversion from the generator's color + // space to this image's color space. + SkColorSpace* srcColorSpace; + { + ScopedGenerator generator(fSharedGenerator); + srcColorSpace = generator->getInfo().colorSpace(); + } + SkColorSpace* dstColorSpace = this->colorSpace(); + + // If the caller expects the pixels in a different color space than the one from the image, + // apply a color conversion to do this. + fp = GrColorSpaceXformEffect::Make(std::move(fp), + srcColorSpace, kOpaque_SkAlphaType, + dstColorSpace, kOpaque_SkAlphaType); + sfc->fillWithFP(std::move(fp)); + + return sfc->readSurfaceView(); +} + +sk_sp SkImage_Lazy::getPlanes( + const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes, + SkYUVAPixmaps* yuvaPixmaps) const { + ScopedGenerator generator(fSharedGenerator); + + sk_sp data(SkYUVPlanesCache::FindAndRef(generator->uniqueID(), yuvaPixmaps)); + + if (data) { + SkASSERT(yuvaPixmaps->isValid()); + SkASSERT(yuvaPixmaps->yuvaInfo().dimensions() == this->dimensions()); + return data; + } + SkYUVAPixmapInfo yuvaPixmapInfo; + if (!generator->queryYUVAInfo(supportedDataTypes, &yuvaPixmapInfo) || + yuvaPixmapInfo.yuvaInfo().dimensions() != this->dimensions()) { + return nullptr; + } + data.reset(SkResourceCache::NewCachedData(yuvaPixmapInfo.computeTotalBytes())); + SkYUVAPixmaps tempPixmaps = SkYUVAPixmaps::FromExternalMemory(yuvaPixmapInfo, + data->writable_data()); + SkASSERT(tempPixmaps.isValid()); + if (!generator->getYUVAPlanes(tempPixmaps)) { + return nullptr; + } + // Decoding is done, cache the resulting YUV planes + *yuvaPixmaps = tempPixmaps; + SkYUVPlanesCache::Add(this->uniqueID(), data.get(), *yuvaPixmaps); + return data; +} + +/* + * We have 4 ways to try to return a texture (in sorted order) + * + * 1. Check the cache for a pre-existing one + * 2. Ask the generator to natively create one + * 3. Ask the generator to return YUV planes, which the GPU can convert + * 4. Ask the generator to return RGB(A) data, which the GPU can convert + */ +GrSurfaceProxyView SkImage_Lazy::lockTextureProxyView(GrRecordingContext* rContext, + GrImageTexGenPolicy texGenPolicy, + GrMipmapped mipmapped) const { + // Values representing the various texture lock paths we can take. Used for logging the path + // taken to a histogram. + enum LockTexturePath { + kFailure_LockTexturePath, + kPreExisting_LockTexturePath, + kNative_LockTexturePath, + kCompressed_LockTexturePath, // Deprecated + kYUV_LockTexturePath, + kRGBA_LockTexturePath, + }; + + enum { kLockTexturePathCount = kRGBA_LockTexturePath + 1 }; + + skgpu::UniqueKey key; + if (texGenPolicy == GrImageTexGenPolicy::kDraw) { + GrMakeKeyFromImageID(&key, this->uniqueID(), SkIRect::MakeSize(this->dimensions())); + } + + const GrCaps* caps = rContext->priv().caps(); + GrProxyProvider* proxyProvider = rContext->priv().proxyProvider(); + + auto installKey = [&](const GrSurfaceProxyView& view) { + SkASSERT(view && view.asTextureProxy()); + if (key.isValid()) { + auto listener = GrMakeUniqueKeyInvalidationListener(&key, rContext->priv().contextID()); + this->addUniqueIDListener(std::move(listener)); + proxyProvider->assignUniqueKeyToProxy(key, view.asTextureProxy()); + } + }; + + auto ct = this->colorTypeOfLockTextureProxy(caps); + + // 1. Check the cache for a pre-existing one. + if (key.isValid()) { + auto proxy = proxyProvider->findOrCreateProxyByUniqueKey(key); + if (proxy) { + skgpu::Swizzle swizzle = caps->getReadSwizzle(proxy->backendFormat(), ct); + GrSurfaceOrigin origin = ScopedGenerator(fSharedGenerator)->origin(); + GrSurfaceProxyView view(std::move(proxy), origin, swizzle); + if (mipmapped == GrMipmapped::kNo || + view.asTextureProxy()->mipmapped() == GrMipmapped::kYes) { + return view; + } else { + // We need a mipped proxy, but we found a cached proxy that wasn't mipped. Thus we + // generate a new mipped surface and copy the original proxy into the base layer. We + // will then let the gpu generate the rest of the mips. + auto mippedView = GrCopyBaseMipMapToView(rContext, view); + if (!mippedView) { + // We failed to make a mipped proxy with the base copied into it. This could + // have been from failure to make the proxy or failure to do the copy. Thus we + // will fall back to just using the non mipped proxy; See skbug.com/7094. + return view; + } + proxyProvider->removeUniqueKeyFromProxy(view.asTextureProxy()); + installKey(mippedView); + return mippedView; + } + } + } + + // 2. Ask the generator to natively create one. + { + ScopedGenerator generator(fSharedGenerator); + if (auto view = generator->generateTexture(rContext, + this->imageInfo(), + mipmapped, + texGenPolicy)) { + installKey(view); + return view; + } + } + + // 3. Ask the generator to return YUV planes, which the GPU can convert. If we will be mipping + // the texture we skip this step so the CPU generate non-planar MIP maps for us. + if (mipmapped == GrMipmapped::kNo && !rContext->priv().options().fDisableGpuYUVConversion) { + // TODO: Update to create the mipped surface in the textureProxyViewFromPlanes generator and + // draw the base layer directly into the mipped surface. + skgpu::Budgeted budgeted = texGenPolicy == GrImageTexGenPolicy::kNew_Uncached_Unbudgeted + ? skgpu::Budgeted::kNo + : skgpu::Budgeted::kYes; + auto view = this->textureProxyViewFromPlanes(rContext, budgeted); + if (view) { + installKey(view); + return view; + } + } + + // 4. Ask the generator to return a bitmap, which the GPU can convert. + auto hint = texGenPolicy == GrImageTexGenPolicy::kDraw ? CachingHint::kAllow_CachingHint + : CachingHint::kDisallow_CachingHint; + if (SkBitmap bitmap; this->getROPixels(nullptr, &bitmap, hint)) { + // We always make an uncached bitmap here because we will cache it based on passed in policy + // with *our* key, not a key derived from bitmap. We're just making the proxy here. + auto budgeted = texGenPolicy == GrImageTexGenPolicy::kNew_Uncached_Unbudgeted + ? skgpu::Budgeted::kNo + : skgpu::Budgeted::kYes; + auto view = std::get<0>(GrMakeUncachedBitmapProxyView(rContext, + bitmap, + mipmapped, + SkBackingFit::kExact, + budgeted)); + if (view) { + installKey(view); + return view; + } + } + + return {}; +} + +GrColorType SkImage_Lazy::colorTypeOfLockTextureProxy(const GrCaps* caps) const { + GrColorType ct = SkColorTypeToGrColorType(this->colorType()); + GrBackendFormat format = caps->getDefaultBackendFormat(ct, GrRenderable::kNo); + if (!format.isValid()) { + ct = GrColorType::kRGBA_8888; + } + return ct; +} + +void SkImage_Lazy::addUniqueIDListener(sk_sp listener) const { + fUniqueIDListeners.add(std::move(listener)); +} +#endif // defined(SK_GANESH) + +#if defined(SK_GRAPHITE) + +/* + * We only have 2 ways to create a Graphite-backed image. + * + * 1. Ask the generator to natively create one + * 2. Ask the generator to return RGB(A) data, which the GPU can convert + */ +sk_sp SkImage_Lazy::onMakeTextureImage(skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProps) const { + using namespace skgpu::graphite; + + // 1. Ask the generator to natively create one. + { + // Disable mipmaps here bc Graphite doesn't currently support mipmap regeneration + // In this case, we would allocate the mipmaps and fill in the base layer but the mipmap + // levels would never be filled out - yielding incorrect draws. Please see: b/238754357. + requiredProps.fMipmapped = skgpu::Mipmapped::kNo; + + ScopedGenerator generator(fSharedGenerator); + sk_sp newImage = generator->makeTextureImage(recorder, + this->imageInfo(), + requiredProps.fMipmapped); + if (newImage) { + SkASSERT(as_IB(newImage)->isGraphiteBacked()); + return newImage; + } + } + + // 2. Ask the generator to return a bitmap, which the GPU can convert. + if (SkBitmap bitmap; this->getROPixels(nullptr, &bitmap, CachingHint::kDisallow_CachingHint)) { + return skgpu::graphite::MakeFromBitmap(recorder, + this->imageInfo().colorInfo(), + bitmap, + nullptr, + skgpu::Budgeted::kNo, + requiredProps); + } + + return nullptr; +} + +sk_sp SkImage_Lazy::onMakeColorTypeAndColorSpace( + SkColorType targetCT, + sk_sp targetCS, + skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProps) const { + SkAutoMutexExclusive autoAquire(fOnMakeColorTypeAndSpaceMutex); + if (fOnMakeColorTypeAndSpaceResult && + targetCT == fOnMakeColorTypeAndSpaceResult->colorType() && + SkColorSpace::Equals(targetCS.get(), fOnMakeColorTypeAndSpaceResult->colorSpace())) { + return fOnMakeColorTypeAndSpaceResult; + } + Validator validator(fSharedGenerator, &targetCT, targetCS); + sk_sp result = validator ? sk_sp(new SkImage_Lazy(&validator)) : nullptr; + if (result) { + fOnMakeColorTypeAndSpaceResult = result; + } + + if (recorder) { + return result->makeTextureImage(recorder, requiredProps); + } else { + return result; + } +} + +#endif diff --git a/gfx/skia/skia/src/image/SkImage_Lazy.h b/gfx/skia/skia/src/image/SkImage_Lazy.h new file mode 100644 index 0000000000..f380d40801 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Lazy.h @@ -0,0 +1,152 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImage_Lazy_DEFINED +#define SkImage_Lazy_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkTypes.h" +#include "include/private/SkIDChangeListener.h" +#include "include/private/base/SkMutex.h" +#include "src/image/SkImage_Base.h" + +#include +#include +#include +#include + +#if defined(SK_GANESH) +#include "include/core/SkYUVAPixmaps.h" +class GrCaps; +class GrDirectContext; +class GrFragmentProcessor; +class GrRecordingContext; +class GrSurfaceProxyView; +#endif + +class SharedGenerator; +class SkBitmap; +class SkCachedData; +class SkData; +class SkMatrix; +class SkPixmap; +enum SkColorType : int; +enum class GrColorType; +enum class GrImageTexGenPolicy : int; +enum class SkTileMode; +struct SkIRect; +struct SkRect; + +namespace skgpu { +enum class Budgeted : bool; +enum class Mipmapped : bool; +} + +class SkImage_Lazy : public SkImage_Base { +public: + struct Validator { + Validator(sk_sp, const SkColorType*, sk_sp); + + explicit operator bool() const { return fSharedGenerator.get(); } + + sk_sp fSharedGenerator; + SkImageInfo fInfo; + sk_sp fColorSpace; + uint32_t fUniqueID; + }; + + SkImage_Lazy(Validator* validator); + + bool onHasMipmaps() const override { + // TODO: Should we defer to the generator? The generator interface currently doesn't have + // a way to provide content for levels other than via SkImageGenerator::generateTexture(). + return false; + } + + bool onReadPixels(GrDirectContext*, const SkImageInfo&, void*, size_t, int srcX, int srcY, + CachingHint) const override; + sk_sp onRefEncoded() const override; + sk_sp onMakeSubset(const SkIRect&, GrDirectContext*) const override; +#if defined(SK_GRAPHITE) + sk_sp onMakeSubset(const SkIRect&, + skgpu::graphite::Recorder*, + RequiredImageProperties) const override; + sk_sp onMakeColorTypeAndColorSpace(SkColorType targetCT, + sk_sp targetCS, + skgpu::graphite::Recorder*, + RequiredImageProperties) const override; +#endif + bool getROPixels(GrDirectContext*, SkBitmap*, CachingHint) const override; + SkImage_Base::Type type() const override { return SkImage_Base::Type::kLazy; } + sk_sp onMakeColorTypeAndColorSpace(SkColorType, sk_sp, + GrDirectContext*) const override; + sk_sp onReinterpretColorSpace(sk_sp) const final; + + bool onIsValid(GrRecordingContext*) const override; + +#if defined(SK_GANESH) + // Returns the texture proxy. CachingHint refers to whether the generator's output should be + // cached in CPU memory. We will always cache the generated texture on success. + GrSurfaceProxyView lockTextureProxyView(GrRecordingContext*, + GrImageTexGenPolicy, + skgpu::Mipmapped) const; + + // Returns the GrColorType to use with the GrTextureProxy returned from lockTextureProxy. This + // may be different from the color type on the image in the case where we need up upload CPU + // data to a texture but the GPU doesn't support the format of CPU data. In this case we convert + // the data to RGBA_8888 unorm on the CPU then upload that. + GrColorType colorTypeOfLockTextureProxy(const GrCaps* caps) const; +#endif + +private: + void addUniqueIDListener(sk_sp) const; + bool readPixelsProxy(GrDirectContext*, const SkPixmap&) const; +#if defined(SK_GANESH) + std::tuple onAsView(GrRecordingContext*, + skgpu::Mipmapped, + GrImageTexGenPolicy) const override; + std::unique_ptr onAsFragmentProcessor(GrRecordingContext*, + SkSamplingOptions, + const SkTileMode[2], + const SkMatrix&, + const SkRect*, + const SkRect*) const override; + + GrSurfaceProxyView textureProxyViewFromPlanes(GrRecordingContext*, skgpu::Budgeted) const; + sk_sp getPlanes(const SkYUVAPixmapInfo::SupportedDataTypes& supportedDataTypes, + SkYUVAPixmaps* pixmaps) const; +#endif + +#if defined(SK_GRAPHITE) + sk_sp onMakeTextureImage(skgpu::graphite::Recorder*, + RequiredImageProperties) const override; +#endif + + class ScopedGenerator; + + // Note that this->imageInfo() is not necessarily the info from the generator. It may be + // cropped by onMakeSubset and its color type/space may be changed by + // onMakeColorTypeAndColorSpace. + sk_sp fSharedGenerator; + + // Repeated calls to onMakeColorTypeAndColorSpace will result in a proliferation of unique IDs + // and SkImage_Lazy instances. Cache the result of the last successful call. + mutable SkMutex fOnMakeColorTypeAndSpaceMutex; + mutable sk_sp fOnMakeColorTypeAndSpaceResult; + +#if defined(SK_GANESH) + // When the SkImage_Lazy goes away, we will iterate over all the listeners to inform them + // of the unique ID's demise. This is used to remove cached textures from GrContext. + mutable SkIDChangeListener::List fUniqueIDListeners; +#endif +}; + +#endif diff --git a/gfx/skia/skia/src/image/SkImage_Raster.cpp b/gfx/skia/skia/src/image/SkImage_Raster.cpp new file mode 100644 index 0000000000..d082ae39a9 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Raster.cpp @@ -0,0 +1,467 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkImage_Raster.h" + +#include "include/core/SkAlphaType.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkData.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixelRef.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMath.h" +#include "src/base/SkRectMemcpy.h" +#include "src/core/SkCompressedDataUtils.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkImagePriv.h" +#include "src/image/SkImage_Base.h" + +#include +#include +#include +#include +#include + +class GrDirectContext; +class SkMatrix; +enum class SkTextureCompressionType; +enum class SkTileMode; + +#if defined(SK_GANESH) +#include "include/gpu/GpuTypes.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" // IWYU pragma: keep +#include "src/gpu/ganesh/GrSurfaceProxyView.h" // IWYU pragma: keep +#include "src/gpu/ganesh/SkGr.h" +#endif + +#if defined(SK_GRAPHITE) +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/gpu/graphite/Recorder.h" +#include "src/gpu/graphite/Buffer.h" +#include "src/gpu/graphite/Caps.h" +#include "src/gpu/graphite/CommandBuffer.h" +#include "src/gpu/graphite/RecorderPriv.h" +#include "src/gpu/graphite/TextureUtils.h" +#include "src/gpu/graphite/UploadTask.h" +#endif + +static void release_data(void* addr, void* context) { + SkData* data = static_cast(context); + data->unref(); +} + +SkImage_Raster::SkImage_Raster(const SkImageInfo& info, sk_sp data, size_t rowBytes, + uint32_t id) + : SkImage_Base(info, id) { + void* addr = const_cast(data->data()); + + fBitmap.installPixels(info, addr, rowBytes, release_data, data.release()); + fBitmap.setImmutable(); +} + +// fixes https://bug.skia.org/5096 +static bool is_not_subset(const SkBitmap& bm) { + SkASSERT(bm.pixelRef()); + SkISize dim = SkISize::Make(bm.pixelRef()->width(), bm.pixelRef()->height()); + SkASSERT(dim != bm.dimensions() || bm.pixelRefOrigin().isZero()); + return dim == bm.dimensions(); +} + +SkImage_Raster::SkImage_Raster(const SkBitmap& bm, bool bitmapMayBeMutable) + : SkImage_Base(bm.info(), + is_not_subset(bm) ? bm.getGenerationID() : (uint32_t)kNeedNewImageUniqueID) + , fBitmap(bm) { + SkASSERT(bitmapMayBeMutable || fBitmap.isImmutable()); +} + +SkImage_Raster::~SkImage_Raster() {} + +bool SkImage_Raster::onReadPixels(GrDirectContext*, + const SkImageInfo& dstInfo, + void* dstPixels, + size_t dstRowBytes, + int srcX, + int srcY, + CachingHint) const { + SkBitmap shallowCopy(fBitmap); + return shallowCopy.readPixels(dstInfo, dstPixels, dstRowBytes, srcX, srcY); +} + +bool SkImage_Raster::onPeekPixels(SkPixmap* pm) const { + return fBitmap.peekPixels(pm); +} + +bool SkImage_Raster::getROPixels(GrDirectContext*, SkBitmap* dst, CachingHint) const { + *dst = fBitmap; + return true; +} + +static SkBitmap copy_bitmap_subset(const SkBitmap& orig, const SkIRect& subset) { + SkImageInfo info = orig.info().makeDimensions(subset.size()); + SkBitmap bitmap; + if (!bitmap.tryAllocPixels(info)) { + return {}; + } + + void* dst = bitmap.getPixels(); + void* src = orig.getAddr(subset.x(), subset.y()); + if (!dst || !src) { + SkDEBUGFAIL("SkImage_Raster::onMakeSubset with nullptr src or dst"); + return {}; + } + + SkRectMemcpy(dst, bitmap.rowBytes(), src, orig.rowBytes(), bitmap.rowBytes(), + subset.height()); + + bitmap.setImmutable(); + return bitmap; +} + +sk_sp SkImage_Raster::onMakeSubset(const SkIRect& subset, GrDirectContext*) const { + SkBitmap copy = copy_bitmap_subset(fBitmap, subset); + if (copy.isNull()) { + return nullptr; + } else { + return copy.asImage(); + } +} + +#if defined(SK_GRAPHITE) +static sk_sp copy_mipmaps(const SkBitmap& src, SkMipmap* srcMips) { + if (!srcMips) { + return nullptr; + } + + sk_sp dst; + dst.reset(SkMipmap::Build(src.pixmap(), nullptr, /* computeContents= */ false)); + for (int i = 0; i < dst->countLevels(); ++i) { + SkMipmap::Level srcLevel, dstLevel; + srcMips->getLevel(i, &srcLevel); + dst->getLevel(i, &dstLevel); + srcLevel.fPixmap.readPixels(dstLevel.fPixmap); + } + + return dst; +} + +sk_sp SkImage_Raster::onMakeSubset(const SkIRect& subset, + skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProperties) const { + sk_sp img; + + if (requiredProperties.fMipmapped == skgpu::Mipmapped::kYes) { + bool fullCopy = subset == SkIRect::MakeSize(fBitmap.dimensions()); + + sk_sp mips = fullCopy ? copy_mipmaps(fBitmap, fBitmap.fMips.get()) : nullptr; + + // SkImage::withMipmaps will always make a copy for us so we can temporarily share + // the pixel ref with fBitmap + SkBitmap tmpSubset; + if (!fBitmap.extractSubset(&tmpSubset, subset)) { + return nullptr; + } + + sk_sp tmp(new SkImage_Raster(tmpSubset, /* bitmapMayBeMutable= */ true)); + + // withMipmaps will auto generate the mipmaps if a nullptr is passed in + SkASSERT(!mips || mips->validForRootLevel(tmp->imageInfo())); + img = tmp->withMipmaps(std::move(mips)); + } else { + SkBitmap copy = copy_bitmap_subset(fBitmap, subset); + if (!copy.isNull()) { + img = copy.asImage(); + } + } + + if (!img) { + return nullptr; + } + + if (recorder) { + return img->makeTextureImage(recorder, requiredProperties); + } else { + return img; + } +} +#endif // SK_GRAPHITE + +/////////////////////////////////////////////////////////////////////////////// + +static bool valid_args(const SkImageInfo& info, size_t rowBytes, size_t* minSize) { + const int maxDimension = SK_MaxS32 >> 2; + + // TODO(mtklein): eliminate anything here that setInfo() has already checked. + SkBitmap b; + if (!b.setInfo(info, rowBytes)) { + return false; + } + + if (info.width() <= 0 || info.height() <= 0) { + return false; + } + if (info.width() > maxDimension || info.height() > maxDimension) { + return false; + } + if ((unsigned)info.colorType() > (unsigned)kLastEnum_SkColorType) { + return false; + } + if ((unsigned)info.alphaType() > (unsigned)kLastEnum_SkAlphaType) { + return false; + } + + if (kUnknown_SkColorType == info.colorType()) { + return false; + } + if (!info.validRowBytes(rowBytes)) { + return false; + } + + size_t size = info.computeByteSize(rowBytes); + if (SkImageInfo::ByteSizeOverflowed(size)) { + return false; + } + + if (minSize) { + *minSize = size; + } + return true; +} + +sk_sp MakeRasterCopyPriv(const SkPixmap& pmap, uint32_t id) { + size_t size; + if (!valid_args(pmap.info(), pmap.rowBytes(), &size) || !pmap.addr()) { + return nullptr; + } + + // Here we actually make a copy of the caller's pixel data + sk_sp data(SkData::MakeWithCopy(pmap.addr(), size)); + return sk_make_sp(pmap.info(), std::move(data), pmap.rowBytes(), id); +} + +sk_sp SkImage::MakeRasterCopy(const SkPixmap& pmap) { + return MakeRasterCopyPriv(pmap, kNeedNewImageUniqueID); +} + +sk_sp SkImage::MakeRasterData(const SkImageInfo& info, sk_sp data, + size_t rowBytes) { + size_t size; + if (!valid_args(info, rowBytes, &size) || !data) { + return nullptr; + } + + // did they give us enough data? + if (data->size() < size) { + return nullptr; + } + + return sk_make_sp(info, std::move(data), rowBytes); +} + +// TODO: this could be improved to decode and make use of the mipmap +// levels potentially present in the compressed data. For now, any +// mipmap levels are discarded. +sk_sp SkImage::MakeRasterFromCompressed(sk_sp data, + int width, int height, + SkTextureCompressionType type) { + size_t expectedSize = SkCompressedFormatDataSize(type, { width, height }, false); + if (!data || data->size() < expectedSize) { + return nullptr; + } + + SkAlphaType at = SkTextureCompressionTypeIsOpaque(type) ? kOpaque_SkAlphaType + : kPremul_SkAlphaType; + + SkImageInfo ii = SkImageInfo::MakeN32(width, height, at); + + if (!valid_args(ii, ii.minRowBytes(), nullptr)) { + return nullptr; + } + + SkBitmap bitmap; + if (!bitmap.tryAllocPixels(ii)) { + return nullptr; + } + + if (!SkDecompress(std::move(data), { width, height }, type, &bitmap)) { + return nullptr; + } + + bitmap.setImmutable(); + return MakeFromBitmap(bitmap); +} + +sk_sp SkImage::MakeFromRaster(const SkPixmap& pmap, RasterReleaseProc proc, + ReleaseContext ctx) { + size_t size; + if (!valid_args(pmap.info(), pmap.rowBytes(), &size) || !pmap.addr()) { + return nullptr; + } + + sk_sp data(SkData::MakeWithProc(pmap.addr(), size, proc, ctx)); + return sk_make_sp(pmap.info(), std::move(data), pmap.rowBytes()); +} + +sk_sp SkMakeImageFromRasterBitmapPriv(const SkBitmap& bm, SkCopyPixelsMode cpm, + uint32_t idForCopy) { + if (kAlways_SkCopyPixelsMode == cpm || (!bm.isImmutable() && kNever_SkCopyPixelsMode != cpm)) { + SkPixmap pmap; + if (bm.peekPixels(&pmap)) { + return MakeRasterCopyPriv(pmap, idForCopy); + } else { + return sk_sp(); + } + } + + return sk_make_sp(bm, kNever_SkCopyPixelsMode == cpm); +} + +sk_sp SkMakeImageFromRasterBitmap(const SkBitmap& bm, SkCopyPixelsMode cpm) { + if (!SkImageInfoIsValid(bm.info()) || bm.rowBytes() < bm.info().minRowBytes()) { + return nullptr; + } + + return SkMakeImageFromRasterBitmapPriv(bm, cpm, kNeedNewImageUniqueID); +} + +const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* image) { + return ((const SkImage_Raster*)image)->getPixelRef(); +} + +bool SkImage_Raster::onAsLegacyBitmap(GrDirectContext*, SkBitmap* bitmap) const { + // When we're a snapshot from a surface, our bitmap may not be marked immutable + // even though logically always we are, but in that case we can't physically share our + // pixelref since the caller might call setImmutable() themselves + // (thus changing our state). + if (fBitmap.isImmutable()) { + SkIPoint origin = fBitmap.pixelRefOrigin(); + bitmap->setInfo(fBitmap.info(), fBitmap.rowBytes()); + bitmap->setPixelRef(sk_ref_sp(fBitmap.pixelRef()), origin.x(), origin.y()); + return true; + } + return this->SkImage_Base::onAsLegacyBitmap(nullptr, bitmap); +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkImage_Raster::onMakeColorTypeAndColorSpace(SkColorType targetCT, + sk_sp targetCS, + GrDirectContext*) const { + SkPixmap src; + SkAssertResult(fBitmap.peekPixels(&src)); + + SkBitmap dst; + if (!dst.tryAllocPixels(fBitmap.info().makeColorType(targetCT).makeColorSpace(targetCS))) { + return nullptr; + } + + SkAssertResult(dst.writePixels(src)); + dst.setImmutable(); + return dst.asImage(); +} + +sk_sp SkImage_Raster::onReinterpretColorSpace(sk_sp newCS) const { + // TODO: If our bitmap is immutable, then we could theoretically create another image sharing + // our pixelRef. That doesn't work (without more invasive logic), because the image gets its + // gen ID from the bitmap, which gets it from the pixelRef. + SkPixmap pixmap = fBitmap.pixmap(); + pixmap.setColorSpace(std::move(newCS)); + return SkImage::MakeRasterCopy(pixmap); +} + +#if defined(SK_GANESH) +std::tuple SkImage_Raster::onAsView( + GrRecordingContext* rContext, + GrMipmapped mipmapped, + GrImageTexGenPolicy policy) const { + if (policy == GrImageTexGenPolicy::kDraw) { + // If the draw doesn't require mipmaps but this SkImage has them go ahead and make a + // mipmapped texture. There are three reasons for this: + // 1) Avoiding another texture creation if a later draw requires mipmaps. + // 2) Ensuring we upload the bitmap's levels instead of generating on the GPU from the base. + if (this->hasMipmaps()) { + mipmapped = GrMipmapped::kYes; + } + return GrMakeCachedBitmapProxyView(rContext, + fBitmap, + /*label=*/"TextureForImageRasterWithPolicyEqualKDraw", + mipmapped); + } + auto budgeted = (policy == GrImageTexGenPolicy::kNew_Uncached_Unbudgeted) + ? skgpu::Budgeted::kNo + : skgpu::Budgeted::kYes; + return GrMakeUncachedBitmapProxyView(rContext, + fBitmap, + mipmapped, + SkBackingFit::kExact, + budgeted); +} + +std::unique_ptr SkImage_Raster::onAsFragmentProcessor( + GrRecordingContext* rContext, + SkSamplingOptions sampling, + const SkTileMode tileModes[2], + const SkMatrix& m, + const SkRect* subset, + const SkRect* domain) const { + auto mm = sampling.mipmap == SkMipmapMode::kNone ? GrMipmapped::kNo : GrMipmapped::kYes; + return MakeFragmentProcessorFromView(rContext, + std::get<0>(this->asView(rContext, mm)), + this->alphaType(), + sampling, + tileModes, + m, + subset, + domain); +} +#endif + +#if defined(SK_GRAPHITE) +sk_sp SkImage_Raster::onMakeTextureImage(skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProps) const { + return skgpu::graphite::MakeFromBitmap(recorder, + this->imageInfo().colorInfo(), + fBitmap, + this->refMips(), + skgpu::Budgeted::kNo, + requiredProps); +} + +sk_sp SkImage_Raster::onMakeColorTypeAndColorSpace( + SkColorType targetCT, + sk_sp targetCS, + skgpu::graphite::Recorder* recorder, + RequiredImageProperties requiredProps) const { + SkPixmap src; + SkAssertResult(fBitmap.peekPixels(&src)); + + SkBitmap dst; + if (!dst.tryAllocPixels(fBitmap.info().makeColorType(targetCT).makeColorSpace(targetCS))) { + return nullptr; + } + + SkAssertResult(dst.writePixels(src)); + dst.setImmutable(); + + sk_sp tmp = dst.asImage(); + if (recorder) { + return tmp->makeTextureImage(recorder, requiredProps); + } else { + return tmp; + } +} + +#endif diff --git a/gfx/skia/skia/src/image/SkImage_Raster.h b/gfx/skia/skia/src/image/SkImage_Raster.h new file mode 100644 index 0000000000..0fbbc0a5c1 --- /dev/null +++ b/gfx/skia/skia/src/image/SkImage_Raster.h @@ -0,0 +1,147 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImage_Raster_DEFINED +#define SkImage_Raster_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkImage.h" +#include "include/core/SkPixelRef.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkMipmap.h" +#include "src/image/SkImage_Base.h" + +#include +#include +#include +#include +#include + +class GrDirectContext; +class GrFragmentProcessor; +class GrRecordingContext; +class GrSurfaceProxyView; +class SkColorSpace; +class SkData; +class SkMatrix; +class SkPixmap; +enum SkColorType : int; +enum class GrColorType; +enum class GrImageTexGenPolicy : int; +enum class SkTileMode; +struct SkIRect; +struct SkImageInfo; +struct SkRect; + +#if defined(SK_GANESH) +#include "include/gpu/GrTypes.h" +#endif + +#if defined(SK_GRAPHITE) +#include "include/gpu/graphite/GraphiteTypes.h" +#include "include/gpu/graphite/Recorder.h" +#include "src/gpu/graphite/Buffer.h" +#include "src/gpu/graphite/Caps.h" +#include "src/gpu/graphite/CommandBuffer.h" +#include "src/gpu/graphite/RecorderPriv.h" +#include "src/gpu/graphite/TextureUtils.h" +#include "src/gpu/graphite/UploadTask.h" +#endif + +class SkImage_Raster : public SkImage_Base { +public: + SkImage_Raster(const SkImageInfo&, sk_sp, size_t rb, + uint32_t id = kNeedNewImageUniqueID); + SkImage_Raster(const SkBitmap& bm, bool bitmapMayBeMutable = false); + ~SkImage_Raster() override; + + bool onReadPixels(GrDirectContext*, const SkImageInfo&, void*, size_t, int srcX, int srcY, + CachingHint) const override; + bool onPeekPixels(SkPixmap*) const override; + const SkBitmap* onPeekBitmap() const override { return &fBitmap; } + + bool getROPixels(GrDirectContext*, SkBitmap*, CachingHint) const override; + sk_sp onMakeSubset(const SkIRect&, GrDirectContext*) const override; +#if defined(SK_GRAPHITE) + sk_sp onMakeSubset(const SkIRect&, + skgpu::graphite::Recorder*, + RequiredImageProperties) const override; +#endif + + SkPixelRef* getPixelRef() const { return fBitmap.pixelRef(); } + + bool onAsLegacyBitmap(GrDirectContext*, SkBitmap*) const override; + + sk_sp onMakeColorTypeAndColorSpace(SkColorType, sk_sp, + GrDirectContext*) const override; + + sk_sp onReinterpretColorSpace(sk_sp) const override; + + bool onIsValid(GrRecordingContext* context) const override { return true; } + void notifyAddedToRasterCache() const override { + // We explicitly DON'T want to call INHERITED::notifyAddedToRasterCache. That ties the + // lifetime of derived/cached resources to the image. In this case, we only want cached + // data (eg mips) tied to the lifetime of the underlying pixelRef. + SkASSERT(fBitmap.pixelRef()); + fBitmap.pixelRef()->notifyAddedToCache(); + } + + SkImage_Base::Type type() const override { return SkImage_Base::Type::kRaster; } + + bool onHasMipmaps() const override { return SkToBool(fBitmap.fMips); } + + SkMipmap* onPeekMips() const override { return fBitmap.fMips.get(); } + + sk_sp onMakeWithMipmaps(sk_sp mips) const override { + // It's dangerous to have two SkBitmaps that share a SkPixelRef but have different SkMipmaps + // since various caches key on SkPixelRef's generation ID. Also, SkPixelRefs that back + // SkSurfaces are marked "temporarily immutable" and making an image that uses the same + // SkPixelRef can interact badly with SkSurface/SkImage copy-on-write. So we just always + // make a copy with a new ID. + static auto constexpr kCopyMode = SkCopyPixelsMode::kAlways_SkCopyPixelsMode; + sk_sp img = SkMakeImageFromRasterBitmap(fBitmap, kCopyMode); + auto imgRaster = static_cast(img.get()); + if (mips) { + imgRaster->fBitmap.fMips = std::move(mips); + } else { + imgRaster->fBitmap.fMips.reset(SkMipmap::Build(fBitmap.pixmap(), nullptr)); + } + return img; + } + +protected: + SkBitmap fBitmap; + +private: +#if defined(SK_GANESH) + std::tuple onAsView(GrRecordingContext*, + GrMipmapped, + GrImageTexGenPolicy) const override; + + std::unique_ptr onAsFragmentProcessor(GrRecordingContext*, + SkSamplingOptions, + const SkTileMode[2], + const SkMatrix&, + const SkRect*, + const SkRect*) const override; +#endif +#if defined(SK_GRAPHITE) + sk_sp onMakeTextureImage(skgpu::graphite::Recorder*, + RequiredImageProperties) const override; + sk_sp onMakeColorTypeAndColorSpace(SkColorType targetCT, + sk_sp targetCS, + skgpu::graphite::Recorder*, + RequiredImageProperties) const override; +#endif + +}; + +#endif // SkImage_Raster_DEFINED diff --git a/gfx/skia/skia/src/image/SkRescaleAndReadPixels.cpp b/gfx/skia/skia/src/image/SkRescaleAndReadPixels.cpp new file mode 100644 index 0000000000..85747e859e --- /dev/null +++ b/gfx/skia/skia/src/image/SkRescaleAndReadPixels.cpp @@ -0,0 +1,166 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkRescaleAndReadPixels.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkBlendMode.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkSurface.h" + +#include +#include +#include +#include + +void SkRescaleAndReadPixels(SkBitmap bmp, + const SkImageInfo& resultInfo, + const SkIRect& srcRect, + SkImage::RescaleGamma rescaleGamma, + SkImage::RescaleMode rescaleMode, + SkImage::ReadPixelsCallback callback, + SkImage::ReadPixelsContext context) { + int srcW = srcRect.width(); + int srcH = srcRect.height(); + + float sx = (float)resultInfo.width() / srcW; + float sy = (float)resultInfo.height() / srcH; + // How many bilerp/bicubic steps to do in X and Y. + means upscaling, - means downscaling. + int stepsX; + int stepsY; + if (rescaleMode != SkImage::RescaleMode::kNearest) { + stepsX = static_cast((sx > 1.f) ? std::ceil(std::log2f(sx)) + : std::floor(std::log2f(sx))); + stepsY = static_cast((sy > 1.f) ? std::ceil(std::log2f(sy)) + : std::floor(std::log2f(sy))); + } else { + stepsX = sx != 1.f; + stepsY = sy != 1.f; + } + + SkPaint paint; + paint.setBlendMode(SkBlendMode::kSrc); + if (stepsX < 0 || stepsY < 0) { + // Don't trigger MIP generation. We don't currently have a way to trigger bicubic for + // downscaling draws. + + // TODO: should we trigger cubic now that we can? + if (rescaleMode != SkImage::RescaleMode::kNearest) { + rescaleMode = SkImage::RescaleMode::kRepeatedLinear; + } + } + + auto rescaling_to_sampling = [](SkImage::RescaleMode rescaleMode) { + SkSamplingOptions sampling; + if (rescaleMode == SkImage::RescaleMode::kRepeatedLinear) { + sampling = SkSamplingOptions(SkFilterMode::kLinear); + } else if (rescaleMode == SkImage::RescaleMode::kRepeatedCubic) { + sampling = SkSamplingOptions({1.0f/3, 1.0f/3}); + } + return sampling; + }; + SkSamplingOptions sampling = rescaling_to_sampling(rescaleMode); + + sk_sp tempSurf; + sk_sp srcImage; + int srcX = srcRect.fLeft; + int srcY = srcRect.fTop; + SkCanvas::SrcRectConstraint constraint = SkCanvas::kStrict_SrcRectConstraint; + // Assume we should ignore the rescale linear request if the surface has no color space since + // it's unclear how we'd linearize from an unknown color space. + if (rescaleGamma == SkSurface::RescaleGamma::kLinear && bmp.info().colorSpace() && + !bmp.info().colorSpace()->gammaIsLinear()) { + auto cs = bmp.info().colorSpace()->makeLinearGamma(); + // Promote to F16 color type to preserve precision. + auto ii = SkImageInfo::Make(srcW, srcH, kRGBA_F16_SkColorType, bmp.info().alphaType(), + std::move(cs)); + auto linearSurf = SkSurface::MakeRaster(ii); + if (!linearSurf) { + callback(context, nullptr); + return; + } + linearSurf->getCanvas()->drawImage(bmp.asImage().get(), -srcX, -srcY, sampling, &paint); + tempSurf = std::move(linearSurf); + srcImage = tempSurf->makeImageSnapshot(); + srcX = 0; + srcY = 0; + constraint = SkCanvas::kFast_SrcRectConstraint; + } else { + // MakeFromBitmap would trigger a copy if bmp is mutable. + srcImage = SkImage::MakeFromRaster(bmp.pixmap(), nullptr, nullptr); + } + while (stepsX || stepsY) { + int nextW = resultInfo.width(); + int nextH = resultInfo.height(); + if (stepsX < 0) { + nextW = resultInfo.width() << (-stepsX - 1); + stepsX++; + } else if (stepsX != 0) { + if (stepsX > 1) { + nextW = srcW * 2; + } + --stepsX; + } + if (stepsY < 0) { + nextH = resultInfo.height() << (-stepsY - 1); + stepsY++; + } else if (stepsY != 0) { + if (stepsY > 1) { + nextH = srcH * 2; + } + --stepsY; + } + auto ii = srcImage->imageInfo().makeWH(nextW, nextH); + if (!stepsX && !stepsY) { + // Might as well fold conversion to final info in the last step. + ii = resultInfo; + } + auto next = SkSurface::MakeRaster(ii); + if (!next) { + callback(context, nullptr); + return; + } + next->getCanvas()->drawImageRect( + srcImage.get(), SkRect::Make(SkIRect::MakeXYWH(srcX, srcY, srcW, srcH)), + SkRect::MakeIWH(nextW, nextH), sampling, &paint, constraint); + tempSurf = std::move(next); + srcImage = tempSurf->makeImageSnapshot(); + srcX = srcY = 0; + srcW = nextW; + srcH = nextH; + constraint = SkCanvas::kFast_SrcRectConstraint; + } + + size_t rowBytes = resultInfo.minRowBytes(); + std::unique_ptr data(new char[resultInfo.height() * rowBytes]); + SkPixmap pm(resultInfo, data.get(), rowBytes); + if (srcImage->readPixels(nullptr, pm, srcX, srcY)) { + class Result : public SkImage::AsyncReadResult { + public: + Result(std::unique_ptr data, size_t rowBytes) + : fData(std::move(data)), fRowBytes(rowBytes) {} + int count() const override { return 1; } + const void* data(int i) const override { return fData.get(); } + size_t rowBytes(int i) const override { return fRowBytes; } + + private: + std::unique_ptr fData; + size_t fRowBytes; + }; + callback(context, std::make_unique(std::move(data), rowBytes)); + } else { + callback(context, nullptr); + } +} diff --git a/gfx/skia/skia/src/image/SkRescaleAndReadPixels.h b/gfx/skia/skia/src/image/SkRescaleAndReadPixels.h new file mode 100644 index 0000000000..ab555d4316 --- /dev/null +++ b/gfx/skia/skia/src/image/SkRescaleAndReadPixels.h @@ -0,0 +1,21 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImage.h" + +class SkBitmap; +struct SkIRect; +struct SkImageInfo; + +/** Generic/synchronous implementation for SkImage:: and SkSurface::asyncRescaleAndReadPixels. */ +void SkRescaleAndReadPixels(SkBitmap src, + const SkImageInfo& resultInfo, + const SkIRect& srcRect, + SkImage::RescaleGamma, + SkImage::RescaleMode, + SkImage::ReadPixelsCallback, + SkImage::ReadPixelsContext); diff --git a/gfx/skia/skia/src/image/SkSurface.cpp b/gfx/skia/skia/src/image/SkSurface.cpp new file mode 100644 index 0000000000..8a2940edd6 --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface.cpp @@ -0,0 +1,300 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkSurface.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkCapabilities.h" // IWYU pragma: keep +#include "include/core/SkColorSpace.h" +#include "include/core/SkDeferredDisplayList.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "include/core/SkSurfaceProps.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkSurfacePriv.h" +#include "src/image/SkSurface_Base.h" + +#include +#include +#include + +class GrBackendSemaphore; +class GrRecordingContext; +class SkPaint; +class SkSurfaceCharacterization; +namespace skgpu { class MutableTextureState; } +namespace skgpu { namespace graphite { class Recorder; } } + +#if defined(SK_GANESH) +#include "include/gpu/GrBackendSurface.h" +#endif + +SkSurfaceProps::SkSurfaceProps() : fFlags(0), fPixelGeometry(kUnknown_SkPixelGeometry) {} + +SkSurfaceProps::SkSurfaceProps(uint32_t flags, SkPixelGeometry pg) + : fFlags(flags), fPixelGeometry(pg) +{} + +SkSurfaceProps::SkSurfaceProps(const SkSurfaceProps&) = default; +SkSurfaceProps& SkSurfaceProps::operator=(const SkSurfaceProps&) = default; + +SkSurface::SkSurface(int width, int height, const SkSurfaceProps* props) + : fProps(SkSurfacePropsCopyOrDefault(props)), fWidth(width), fHeight(height) +{ + SkASSERT(fWidth > 0); + SkASSERT(fHeight > 0); + fGenerationID = 0; +} + +SkSurface::SkSurface(const SkImageInfo& info, const SkSurfaceProps* props) + : fProps(SkSurfacePropsCopyOrDefault(props)), fWidth(info.width()), fHeight(info.height()) +{ + SkASSERT(fWidth > 0); + SkASSERT(fHeight > 0); + fGenerationID = 0; +} + +uint32_t SkSurface::generationID() { + if (0 == fGenerationID) { + fGenerationID = asSB(this)->newGenerationID(); + } + return fGenerationID; +} + +void SkSurface::notifyContentWillChange(ContentChangeMode mode) { + sk_ignore_unused_variable(asSB(this)->aboutToDraw(mode)); +} + +SkCanvas* SkSurface::getCanvas() { + return asSB(this)->getCachedCanvas(); +} + +sk_sp SkSurface::capabilities() { + return asSB(this)->onCapabilities(); +} + +sk_sp SkSurface::makeImageSnapshot() { + return asSB(this)->refCachedImage(); +} + +sk_sp SkSurface::makeImageSnapshot(const SkIRect& srcBounds) { + const SkIRect surfBounds = { 0, 0, fWidth, fHeight }; + SkIRect bounds = srcBounds; + if (!bounds.intersect(surfBounds)) { + return nullptr; + } + SkASSERT(!bounds.isEmpty()); + if (bounds == surfBounds) { + return this->makeImageSnapshot(); + } else { + return asSB(this)->onNewImageSnapshot(&bounds); + } +} + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Log.h" + +sk_sp SkSurface::asImage() { + if (asSB(this)->fCachedImage) { + SKGPU_LOG_W("Intermingling makeImageSnapshot and asImage calls may produce " + "unexpected results. Please use either the old _or_ new API."); + } + + return asSB(this)->onAsImage(); +} + +sk_sp SkSurface::makeImageCopy(const SkIRect* subset, + skgpu::Mipmapped mipmapped) { + if (asSB(this)->fCachedImage) { + SKGPU_LOG_W("Intermingling makeImageSnapshot and makeImageCopy calls may produce " + "unexpected results. Please use either the old _or_ new API."); + } + + return asSB(this)->onMakeImageCopy(subset, mipmapped); +} +#endif + +sk_sp SkSurface::makeSurface(const SkImageInfo& info) { + return asSB(this)->onNewSurface(info); +} + +sk_sp SkSurface::makeSurface(int width, int height) { + return this->makeSurface(this->imageInfo().makeWH(width, height)); +} + +void SkSurface::draw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkSamplingOptions& sampling, + const SkPaint* paint) { + asSB(this)->onDraw(canvas, x, y, sampling, paint); +} + +bool SkSurface::peekPixels(SkPixmap* pmap) { + return this->getCanvas()->peekPixels(pmap); +} + +bool SkSurface::readPixels(const SkPixmap& pm, int srcX, int srcY) { + return this->getCanvas()->readPixels(pm, srcX, srcY); +} + +bool SkSurface::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes, + int srcX, int srcY) { + return this->readPixels({dstInfo, dstPixels, dstRowBytes}, srcX, srcY); +} + +bool SkSurface::readPixels(const SkBitmap& bitmap, int srcX, int srcY) { + SkPixmap pm; + return bitmap.peekPixels(&pm) && this->readPixels(pm, srcX, srcY); +} + +void SkSurface::asyncRescaleAndReadPixels(const SkImageInfo& info, + const SkIRect& srcRect, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) { + if (!SkIRect::MakeWH(this->width(), this->height()).contains(srcRect) || + !SkImageInfoIsValid(info)) { + callback(context, nullptr); + return; + } + asSB(this)->onAsyncRescaleAndReadPixels( + info, srcRect, rescaleGamma, rescaleMode, callback, context); +} + +void SkSurface::asyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace, + sk_sp dstColorSpace, + const SkIRect& srcRect, + const SkISize& dstSize, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) { + if (!SkIRect::MakeWH(this->width(), this->height()).contains(srcRect) || dstSize.isZero() || + (dstSize.width() & 0b1) || (dstSize.height() & 0b1)) { + callback(context, nullptr); + return; + } + asSB(this)->onAsyncRescaleAndReadPixelsYUV420(yuvColorSpace, + std::move(dstColorSpace), + srcRect, + dstSize, + rescaleGamma, + rescaleMode, + callback, + context); +} + +void SkSurface::writePixels(const SkPixmap& pmap, int x, int y) { + if (pmap.addr() == nullptr || pmap.width() <= 0 || pmap.height() <= 0) { + return; + } + + const SkIRect srcR = SkIRect::MakeXYWH(x, y, pmap.width(), pmap.height()); + const SkIRect dstR = SkIRect::MakeWH(this->width(), this->height()); + if (SkIRect::Intersects(srcR, dstR)) { + ContentChangeMode mode = kRetain_ContentChangeMode; + if (srcR.contains(dstR)) { + mode = kDiscard_ContentChangeMode; + } + if (!asSB(this)->aboutToDraw(mode)) { + return; + } + asSB(this)->onWritePixels(pmap, x, y); + } +} + +void SkSurface::writePixels(const SkBitmap& src, int x, int y) { + SkPixmap pm; + if (src.peekPixels(&pm)) { + this->writePixels(pm, x, y); + } +} + +GrRecordingContext* SkSurface::recordingContext() { + return asSB(this)->onGetRecordingContext(); +} + +skgpu::graphite::Recorder* SkSurface::recorder() { + return asSB(this)->onGetRecorder(); +} + +bool SkSurface::wait(int numSemaphores, const GrBackendSemaphore* waitSemaphores, + bool deleteSemaphoresAfterWait) { + return asSB(this)->onWait(numSemaphores, waitSemaphores, deleteSemaphoresAfterWait); +} + +bool SkSurface::characterize(SkSurfaceCharacterization* characterization) const { + return asConstSB(this)->onCharacterize(characterization); +} + +bool SkSurface::isCompatible(const SkSurfaceCharacterization& characterization) const { + return asConstSB(this)->onIsCompatible(characterization); +} + +bool SkSurface::draw(sk_sp ddl, int xOffset, int yOffset) { + if (xOffset != 0 || yOffset != 0) { + return false; // the offsets currently aren't supported + } + + return asSB(this)->onDraw(std::move(ddl), { xOffset, yOffset }); +} + +#if defined(SK_GANESH) +GrBackendTexture SkSurface::getBackendTexture(BackendHandleAccess access) { + return asSB(this)->onGetBackendTexture(access); +} + +GrBackendRenderTarget SkSurface::getBackendRenderTarget(BackendHandleAccess access) { + return asSB(this)->onGetBackendRenderTarget(access); +} + +bool SkSurface::replaceBackendTexture(const GrBackendTexture& backendTexture, + GrSurfaceOrigin origin, ContentChangeMode mode, + TextureReleaseProc textureReleaseProc, + ReleaseContext releaseContext) { + return asSB(this)->onReplaceBackendTexture(backendTexture, origin, mode, textureReleaseProc, + releaseContext); +} + +void SkSurface::resolveMSAA() { + asSB(this)->onResolveMSAA(); +} + +GrSemaphoresSubmitted SkSurface::flush(BackendSurfaceAccess access, const GrFlushInfo& flushInfo) { + return asSB(this)->onFlush(access, flushInfo, nullptr); +} + +GrSemaphoresSubmitted SkSurface::flush(const GrFlushInfo& info, + const skgpu::MutableTextureState* newState) { + return asSB(this)->onFlush(BackendSurfaceAccess::kNoAccess, info, newState); +} + +void SkSurface::flush() { + this->flush({}); +} +#else +void SkSurface::flush() {} // Flush is a no-op for CPU surfaces + +void SkSurface::flushAndSubmit(bool syncCpu) {} + +// TODO(kjlubick, scroggo) Remove this once Android is updated. +sk_sp SkSurface::MakeRenderTarget(GrRecordingContext*, + skgpu::Budgeted, + const SkImageInfo&, + int, + GrSurfaceOrigin, + const SkSurfaceProps*, + bool) { + return nullptr; +} +#endif diff --git a/gfx/skia/skia/src/image/SkSurface_Base.cpp b/gfx/skia/skia/src/image/SkSurface_Base.cpp new file mode 100644 index 0000000000..b5b993b7c1 --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_Base.cpp @@ -0,0 +1,169 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkSurface_Base.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkCapabilities.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkPixmap.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSize.h" +#include "src/image/SkImage_Base.h" +#include "src/image/SkRescaleAndReadPixels.h" + +#include +#include +#include + +class GrRecordingContext; +class SkColorSpace; +class SkPaint; +class SkSurfaceProps; +namespace skgpu { namespace graphite { class Recorder; } } + +#if defined(SK_GANESH) +#include "include/gpu/GrBackendSurface.h" +#endif + + +SkSurface_Base::SkSurface_Base(int width, int height, const SkSurfaceProps* props) + : INHERITED(width, height, props) { +} + +SkSurface_Base::SkSurface_Base(const SkImageInfo& info, const SkSurfaceProps* props) + : INHERITED(info, props) { +} + +SkSurface_Base::~SkSurface_Base() { + // in case the canvas outsurvives us, we null the callback + if (fCachedCanvas) { + fCachedCanvas->setSurfaceBase(nullptr); + } +#if defined(SK_GANESH) + if (fCachedImage) { + as_IB(fCachedImage.get())->generatingSurfaceIsDeleted(); + } +#endif +} + +GrRecordingContext* SkSurface_Base::onGetRecordingContext() { + return nullptr; +} + +skgpu::graphite::Recorder* SkSurface_Base::onGetRecorder() { + return nullptr; +} + +#if defined(SK_GANESH) +GrBackendTexture SkSurface_Base::onGetBackendTexture(BackendHandleAccess) { + return GrBackendTexture(); // invalid +} + +GrBackendRenderTarget SkSurface_Base::onGetBackendRenderTarget(BackendHandleAccess) { + return GrBackendRenderTarget(); // invalid +} + +bool SkSurface_Base::onReplaceBackendTexture(const GrBackendTexture&, + GrSurfaceOrigin, ContentChangeMode, + TextureReleaseProc, + ReleaseContext) { + return false; +} +#endif + +void SkSurface_Base::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint) { + auto image = this->makeImageSnapshot(); + if (image) { + canvas->drawImage(image.get(), x, y, sampling, paint); + } +} + +void SkSurface_Base::onAsyncRescaleAndReadPixels(const SkImageInfo& info, + SkIRect origSrcRect, + SkSurface::RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + SkSurface::ReadPixelsCallback callback, + SkSurface::ReadPixelsContext context) { + SkBitmap src; + SkPixmap peek; + SkIRect srcRect; + if (this->peekPixels(&peek)) { + src.installPixels(peek); + srcRect = origSrcRect; + } else { + src.setInfo(this->imageInfo().makeDimensions(origSrcRect.size())); + src.allocPixels(); + if (!this->readPixels(src, origSrcRect.x(), origSrcRect.y())) { + callback(context, nullptr); + return; + } + srcRect = SkIRect::MakeSize(src.dimensions()); + } + return SkRescaleAndReadPixels(src, info, srcRect, rescaleGamma, rescaleMode, callback, + context); +} + +void SkSurface_Base::onAsyncRescaleAndReadPixelsYUV420( + SkYUVColorSpace yuvColorSpace, sk_sp dstColorSpace, SkIRect srcRect, + SkISize dstSize, RescaleGamma rescaleGamma, RescaleMode, + ReadPixelsCallback callback, ReadPixelsContext context) { + // TODO: Call non-YUV asyncRescaleAndReadPixels and then make our callback convert to YUV and + // call client's callback. + callback(context, nullptr); +} + +bool SkSurface_Base::outstandingImageSnapshot() const { + return fCachedImage && !fCachedImage->unique(); +} + +bool SkSurface_Base::aboutToDraw(ContentChangeMode mode) { + this->dirtyGenerationID(); + + SkASSERT(!fCachedCanvas || fCachedCanvas->getSurfaceBase() == this); + + if (fCachedImage) { + // the surface may need to fork its backend, if its sharing it with + // the cached image. Note: we only call if there is an outstanding owner + // on the image (besides us). + bool unique = fCachedImage->unique(); + if (!unique) { + if (!this->onCopyOnWrite(mode)) { + return false; + } + } + + // regardless of copy-on-write, we must drop our cached image now, so + // that the next request will get our new contents. + fCachedImage.reset(); + + if (unique) { + // Our content isn't held by any image now, so we can consider that content mutable. + // Raster surfaces need to be told it's safe to consider its pixels mutable again. + // We make this call after the ->unref() so the subclass can assert there are no images. + this->onRestoreBackingMutability(); + } + } else if (kDiscard_ContentChangeMode == mode) { + this->onDiscard(); + } + return true; +} + +uint32_t SkSurface_Base::newGenerationID() { + SkASSERT(!fCachedCanvas || fCachedCanvas->getSurfaceBase() == this); + static std::atomic nextID{1}; + return nextID.fetch_add(1, std::memory_order_relaxed); +} + +sk_sp SkSurface_Base::onCapabilities() { + return SkCapabilities::RasterBackend(); +} diff --git a/gfx/skia/skia/src/image/SkSurface_Base.h b/gfx/skia/skia/src/image/SkSurface_Base.h new file mode 100644 index 0000000000..13634b2010 --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_Base.h @@ -0,0 +1,237 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSurface_Base_DEFINED +#define SkSurface_Base_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkDeferredDisplayList.h" // IWYU pragma: keep +#include "include/core/SkImage.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrTypes.h" +#endif + +#include +#include + +class GrBackendSemaphore; +class GrRecordingContext; +class SkCapabilities; +class SkColorSpace; +class SkPaint; +class SkPixmap; +class SkSurfaceCharacterization; +class SkSurfaceProps; +enum SkYUVColorSpace : int; +namespace skgpu { class MutableTextureState; } +namespace skgpu { namespace graphite { class Recorder; } } +struct SkIRect; +struct SkISize; +struct SkImageInfo; + +class SkSurface_Base : public SkSurface { +public: + SkSurface_Base(int width, int height, const SkSurfaceProps*); + SkSurface_Base(const SkImageInfo&, const SkSurfaceProps*); + ~SkSurface_Base() override; + + virtual GrRecordingContext* onGetRecordingContext(); + virtual skgpu::graphite::Recorder* onGetRecorder(); + +#if defined(SK_GANESH) + virtual GrBackendTexture onGetBackendTexture(BackendHandleAccess); + virtual GrBackendRenderTarget onGetBackendRenderTarget(BackendHandleAccess); + virtual bool onReplaceBackendTexture(const GrBackendTexture&, + GrSurfaceOrigin, + ContentChangeMode, + TextureReleaseProc, + ReleaseContext); + + virtual void onResolveMSAA() {} + + /** + * Issue any pending surface IO to the current backend 3D API and resolve any surface MSAA. + * Inserts the requested number of semaphores for the gpu to signal when work is complete on the + * gpu and inits the array of GrBackendSemaphores with the signaled semaphores. + */ + virtual GrSemaphoresSubmitted onFlush(BackendSurfaceAccess access, const GrFlushInfo&, + const skgpu::MutableTextureState*) { + return GrSemaphoresSubmitted::kNo; + } +#endif + + /** + * Allocate a canvas that will draw into this surface. We will cache this + * canvas, to return the same object to the caller multiple times. We + * take ownership, and will call unref() on the canvas when we go out of + * scope. + */ + virtual SkCanvas* onNewCanvas() = 0; + + virtual sk_sp onNewSurface(const SkImageInfo&) = 0; + + /** + * Allocate an SkImage that represents the current contents of the surface. + * This needs to be able to outlive the surface itself (if need be), and + * must faithfully represent the current contents, even if the surface + * is changed after this called (e.g. it is drawn to via its canvas). + * + * If a subset is specified, the the impl must make a copy, rather than try to wait + * on copy-on-write. + */ + virtual sk_sp onNewImageSnapshot(const SkIRect* subset = nullptr) { return nullptr; } + +#if defined(SK_GRAPHITE) + virtual sk_sp onAsImage() { return nullptr; } + + virtual sk_sp onMakeImageCopy(const SkIRect* /* subset */, + skgpu::Mipmapped) { + return nullptr; + } +#endif + + virtual void onWritePixels(const SkPixmap&, int x, int y) = 0; + + /** + * Default implementation does a rescale/read and then calls the callback. + */ + virtual void onAsyncRescaleAndReadPixels(const SkImageInfo&, + const SkIRect srcRect, + RescaleGamma, + RescaleMode, + ReadPixelsCallback, + ReadPixelsContext); + /** + * Default implementation does a rescale/read/yuv conversion and then calls the callback. + */ + virtual void onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace, + sk_sp dstColorSpace, + SkIRect srcRect, + SkISize dstSize, + RescaleGamma, + RescaleMode, + ReadPixelsCallback, + ReadPixelsContext); + + /** + * Default implementation: + * + * image = this->newImageSnapshot(); + * if (image) { + * image->draw(canvas, ...); + * image->unref(); + * } + */ + virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y, const SkSamplingOptions&,const SkPaint*); + + /** + * Called as a performance hint when the Surface is allowed to make it's contents + * undefined. + */ + virtual void onDiscard() {} + + /** + * If the surface is about to change, we call this so that our subclass + * can optionally fork their backend (copy-on-write) in case it was + * being shared with the cachedImage. + * + * Returns false if the backing cannot be un-shared. + */ + virtual bool SK_WARN_UNUSED_RESULT onCopyOnWrite(ContentChangeMode) = 0; + + /** + * Signal the surface to remind its backing store that it's mutable again. + * Called only when we _didn't_ copy-on-write; we assume the copies start mutable. + */ + virtual void onRestoreBackingMutability() {} + + /** + * Caused the current backend 3D API to wait on the passed in semaphores before executing new + * commands on the gpu. Any previously submitting commands will not be blocked by these + * semaphores. + */ + virtual bool onWait(int numSemaphores, const GrBackendSemaphore* waitSemaphores, + bool deleteSemaphoresAfterWait) { + return false; + } + + virtual bool onCharacterize(SkSurfaceCharacterization*) const { return false; } + virtual bool onIsCompatible(const SkSurfaceCharacterization&) const { return false; } + virtual bool onDraw(sk_sp, SkIPoint offset) { + return false; + } + + // TODO: Remove this (make it pure virtual) after updating Android (which has a class derived + // from SkSurface_Base). + virtual sk_sp onCapabilities(); + + // True for surfaces instantiated by Graphite in GPU memory + virtual bool isGraphiteBacked() const { return false; } + + inline SkCanvas* getCachedCanvas(); + inline sk_sp refCachedImage(); + + bool hasCachedImage() const { return fCachedImage != nullptr; } + + // called by SkSurface to compute a new genID + uint32_t newGenerationID(); + +private: + std::unique_ptr fCachedCanvas; + sk_sp fCachedImage; + + // Returns false if drawing should not take place (allocation failure). + bool SK_WARN_UNUSED_RESULT aboutToDraw(ContentChangeMode mode); + + // Returns true if there is an outstanding image-snapshot, indicating that a call to aboutToDraw + // would trigger a copy-on-write. + bool outstandingImageSnapshot() const; + + friend class SkCanvas; + friend class SkSurface; + + using INHERITED = SkSurface; +}; + +SkCanvas* SkSurface_Base::getCachedCanvas() { + if (nullptr == fCachedCanvas) { + fCachedCanvas = std::unique_ptr(this->onNewCanvas()); + if (fCachedCanvas) { + fCachedCanvas->setSurfaceBase(this); + } + } + return fCachedCanvas.get(); +} + +sk_sp SkSurface_Base::refCachedImage() { + if (fCachedImage) { + return fCachedImage; + } + + fCachedImage = this->onNewImageSnapshot(); + + SkASSERT(!fCachedCanvas || fCachedCanvas->getSurfaceBase() == this); + return fCachedImage; +} + +static inline SkSurface_Base* asSB(SkSurface* surface) { + return static_cast(surface); +} + +static inline const SkSurface_Base* asConstSB(const SkSurface* surface) { + return static_cast(surface); +} + +#endif diff --git a/gfx/skia/skia/src/image/SkSurface_Gpu.cpp b/gfx/skia/skia/src/image/SkSurface_Gpu.cpp new file mode 100644 index 0000000000..0a3c52071a --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_Gpu.cpp @@ -0,0 +1,813 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkSurface_Gpu.h" + +#if defined(SK_GANESH) + +#include "include/core/SkCanvas.h" +#include "include/core/SkColorSpace.h" +#include "include/core/SkColorType.h" +#include "include/core/SkDeferredDisplayList.h" +#include "include/core/SkImage.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkSize.h" +#include "include/core/SkSurface.h" +#include "include/core/SkSurfaceCharacterization.h" +#include "include/core/SkSurfaceProps.h" +#include "include/gpu/GpuTypes.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/GrContextThreadSafeProxy.h" +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "include/gpu/GrTypes.h" +#include "include/private/base/SkTo.h" +#include "include/private/gpu/ganesh/GrTypesPriv.h" +#include "src/core/SkDevice.h" +#include "src/core/SkSurfacePriv.h" +#include "src/gpu/RefCntedCallback.h" +#include "src/gpu/SkBackingFit.h" +#include "src/gpu/SkRenderEngineAbortf.h" +#include "src/gpu/ganesh/Device_v1.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrContextThreadSafeProxyPriv.h" +#include "src/gpu/ganesh/GrDirectContextPriv.h" +#include "src/gpu/ganesh/GrGpuResourcePriv.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrRenderTarget.h" +#include "src/gpu/ganesh/GrRenderTargetProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxy.h" +#include "src/gpu/ganesh/GrSurfaceProxyPriv.h" +#include "src/gpu/ganesh/GrSurfaceProxyView.h" +#include "src/gpu/ganesh/GrTexture.h" +#include "src/gpu/ganesh/GrTextureProxy.h" +#include "src/image/SkImage_Base.h" +#include "src/image/SkImage_Gpu.h" + +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 +#include "src/gpu/ganesh/GrAHardwareBufferUtils_impl.h" +#endif + +#include +#include +#include + +class GrBackendSemaphore; +class SkCapabilities; +class SkPaint; +class SkPixmap; +namespace skgpu { class MutableTextureState; } + +SkSurface_Gpu::SkSurface_Gpu(sk_sp device) + : INHERITED(device->width(), device->height(), &device->surfaceProps()) + , fDevice(std::move(device)) { + SkASSERT(fDevice->targetProxy()->priv().isExact()); +} + +SkSurface_Gpu::~SkSurface_Gpu() { +} + +GrRecordingContext* SkSurface_Gpu::onGetRecordingContext() { + return fDevice->recordingContext(); +} + +skgpu::ganesh::Device* SkSurface_Gpu::getDevice() { return fDevice.get(); } + +SkImageInfo SkSurface_Gpu::imageInfo() const { + return fDevice->imageInfo(); +} + +static GrRenderTarget* prepare_rt_for_external_access(SkSurface_Gpu* surface, + SkSurface::BackendHandleAccess access) { + auto dContext = surface->recordingContext()->asDirectContext(); + if (!dContext) { + return nullptr; + } + if (dContext->abandoned()) { + return nullptr; + } + + switch (access) { + case SkSurface::kFlushRead_BackendHandleAccess: + break; + case SkSurface::kFlushWrite_BackendHandleAccess: + case SkSurface::kDiscardWrite_BackendHandleAccess: + // for now we don't special-case on Discard, but we may in the future. + surface->notifyContentWillChange(SkSurface::kRetain_ContentChangeMode); + break; + } + + dContext->priv().flushSurface(surface->getDevice()->targetProxy()); + + // Grab the render target *after* firing notifications, as it may get switched if CoW kicks in. + return surface->getDevice()->targetProxy()->peekRenderTarget(); +} + +GrBackendTexture SkSurface_Gpu::onGetBackendTexture(BackendHandleAccess access) { + GrRenderTarget* rt = prepare_rt_for_external_access(this, access); + if (!rt) { + return GrBackendTexture(); // invalid + } + GrTexture* texture = rt->asTexture(); + if (texture) { + return texture->getBackendTexture(); + } + return GrBackendTexture(); // invalid +} + +GrBackendRenderTarget SkSurface_Gpu::onGetBackendRenderTarget(BackendHandleAccess access) { + GrRenderTarget* rt = prepare_rt_for_external_access(this, access); + if (!rt) { + return GrBackendRenderTarget(); // invalid + } + + return rt->getBackendRenderTarget(); +} + +SkCanvas* SkSurface_Gpu::onNewCanvas() { return new SkCanvas(fDevice); } + +sk_sp SkSurface_Gpu::onNewSurface(const SkImageInfo& info) { + GrSurfaceProxyView targetView = fDevice->readSurfaceView(); + int sampleCount = targetView.asRenderTargetProxy()->numSamples(); + GrSurfaceOrigin origin = targetView.origin(); + // TODO: Make caller specify this (change virtual signature of onNewSurface). + static const skgpu::Budgeted kBudgeted = skgpu::Budgeted::kNo; + return SkSurface::MakeRenderTarget(fDevice->recordingContext(), kBudgeted, info, sampleCount, + origin, &this->props()); +} + +sk_sp SkSurface_Gpu::onNewImageSnapshot(const SkIRect* subset) { + GrRenderTargetProxy* rtp = fDevice->targetProxy(); + if (!rtp) { + return nullptr; + } + + auto rContext = fDevice->recordingContext(); + + GrSurfaceProxyView srcView = fDevice->readSurfaceView(); + + skgpu::Budgeted budgeted = rtp->isBudgeted(); + + if (subset || !srcView.asTextureProxy() || rtp->refsWrappedObjects()) { + // If the original render target is a buffer originally created by the client, then we don't + // want to ever retarget the SkSurface at another buffer we create. If the source is a + // texture (and the image is not subsetted) we make a dual-proxied SkImage that will + // attempt to share the backing store until the surface writes to the shared backing store + // at which point it uses a copy. + if (!subset && srcView.asTextureProxy()) { + return SkImage_Gpu::MakeWithVolatileSrc(sk_ref_sp(rContext), + srcView, + fDevice->imageInfo().colorInfo()); + } + auto rect = subset ? *subset : SkIRect::MakeSize(srcView.dimensions()); + GrMipmapped mipmapped = srcView.mipmapped(); + srcView = GrSurfaceProxyView::Copy(rContext, + std::move(srcView), + mipmapped, + rect, + SkBackingFit::kExact, + budgeted, + /*label=*/"SurfaceGpu_NewImageSnapshot"); + } + + const SkImageInfo info = fDevice->imageInfo(); + if (!srcView.asTextureProxy()) { + return nullptr; + } + // The surfaceDrawContext coming out of SkGpuDevice should always be exact and the + // above copy creates a kExact surfaceContext. + SkASSERT(srcView.proxy()->priv().isExact()); + return sk_make_sp(sk_ref_sp(rContext), + kNeedNewImageUniqueID, + std::move(srcView), + info.colorInfo()); +} + +void SkSurface_Gpu::onWritePixels(const SkPixmap& src, int x, int y) { + fDevice->writePixels(src, x, y); +} + +void SkSurface_Gpu::onAsyncRescaleAndReadPixels(const SkImageInfo& info, + SkIRect srcRect, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) { + fDevice->asyncRescaleAndReadPixels(info, + srcRect, + rescaleGamma, + rescaleMode, + callback, + context); +} + +void SkSurface_Gpu::onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace, + sk_sp dstColorSpace, + SkIRect srcRect, + SkISize dstSize, + RescaleGamma rescaleGamma, + RescaleMode rescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) { + fDevice->asyncRescaleAndReadPixelsYUV420(yuvColorSpace, + std::move(dstColorSpace), + srcRect, + dstSize, + rescaleGamma, + rescaleMode, + callback, + context); +} + +// Create a new render target and, if necessary, copy the contents of the old +// render target into it. Note that this flushes the SkGpuDevice but +// doesn't force an OpenGL flush. +bool SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) { + GrSurfaceProxyView readSurfaceView = fDevice->readSurfaceView(); + + // are we sharing our backing proxy with the image? Note this call should never create a new + // image because onCopyOnWrite is only called when there is a cached image. + sk_sp image = this->refCachedImage(); + SkASSERT(image); + + if (static_cast(image.get())->surfaceMustCopyOnWrite(readSurfaceView.proxy())) { + if (!fDevice->replaceBackingProxy(mode)) { + return false; + } + } else if (kDiscard_ContentChangeMode == mode) { + this->SkSurface_Gpu::onDiscard(); + } + return true; +} + +void SkSurface_Gpu::onDiscard() { fDevice->discard(); } + +void SkSurface_Gpu::onResolveMSAA() { fDevice->resolveMSAA(); } + +GrSemaphoresSubmitted SkSurface_Gpu::onFlush(BackendSurfaceAccess access, const GrFlushInfo& info, + const skgpu::MutableTextureState* newState) { + + auto dContext = fDevice->recordingContext()->asDirectContext(); + if (!dContext) { + return GrSemaphoresSubmitted::kNo; + } + + GrRenderTargetProxy* rtp = fDevice->targetProxy(); + + return dContext->priv().flushSurface(rtp, access, info, newState); +} + +bool SkSurface_Gpu::onWait(int numSemaphores, const GrBackendSemaphore* waitSemaphores, + bool deleteSemaphoresAfterWait) { + return fDevice->wait(numSemaphores, waitSemaphores, deleteSemaphoresAfterWait); +} + +bool SkSurface_Gpu::onCharacterize(SkSurfaceCharacterization* characterization) const { + auto direct = fDevice->recordingContext()->asDirectContext(); + if (!direct) { + return false; + } + + SkImageInfo ii = fDevice->imageInfo(); + if (ii.colorType() == kUnknown_SkColorType) { + return false; + } + + GrSurfaceProxyView readSurfaceView = fDevice->readSurfaceView(); + size_t maxResourceBytes = direct->getResourceCacheLimit(); + + bool mipmapped = readSurfaceView.asTextureProxy() + ? GrMipmapped::kYes == readSurfaceView.asTextureProxy()->mipmapped() + : false; + + bool usesGLFBO0 = readSurfaceView.asRenderTargetProxy()->glRTFBOIDIs0(); + // We should never get in the situation where we have a texture render target that is also + // backend by FBO 0. + SkASSERT(!usesGLFBO0 || !SkToBool(readSurfaceView.asTextureProxy())); + + bool vkRTSupportsInputAttachment = + readSurfaceView.asRenderTargetProxy()->supportsVkInputAttachment(); + + GrBackendFormat format = readSurfaceView.proxy()->backendFormat(); + int numSamples = readSurfaceView.asRenderTargetProxy()->numSamples(); + GrProtected isProtected = readSurfaceView.asRenderTargetProxy()->isProtected(); + + characterization->set( + direct->threadSafeProxy(), + maxResourceBytes, + ii, + format, + readSurfaceView.origin(), + numSamples, + SkSurfaceCharacterization::Textureable(SkToBool(readSurfaceView.asTextureProxy())), + SkSurfaceCharacterization::MipMapped(mipmapped), + SkSurfaceCharacterization::UsesGLFBO0(usesGLFBO0), + SkSurfaceCharacterization::VkRTSupportsInputAttachment(vkRTSupportsInputAttachment), + SkSurfaceCharacterization::VulkanSecondaryCBCompatible(false), + isProtected, + this->props()); + return true; +} + +void SkSurface_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint) { + // If the dst is also GPU we try to not force a new image snapshot (by calling the base class + // onDraw) since that may not always perform the copy-on-write optimization. + auto tryDraw = [&] { + auto surfaceContext = fDevice->recordingContext(); + auto canvasContext = GrAsDirectContext(canvas->recordingContext()); + if (!canvasContext) { + return false; + } + if (canvasContext->priv().contextID() != surfaceContext->priv().contextID()) { + return false; + } + GrSurfaceProxyView srcView = fDevice->readSurfaceView(); + if (!srcView.asTextureProxyRef()) { + return false; + } + // Possibly we could skip making an image here if SkGpuDevice exposed a lower level way + // of drawing a texture proxy. + const SkImageInfo info = fDevice->imageInfo(); + sk_sp image = sk_make_sp(sk_ref_sp(canvasContext), + kNeedNewImageUniqueID, + std::move(srcView), + info.colorInfo()); + canvas->drawImage(image.get(), x, y, sampling, paint); + return true; + }; + if (!tryDraw()) { + INHERITED::onDraw(canvas, x, y, sampling, paint); + } +} + +bool SkSurface_Gpu::onIsCompatible(const SkSurfaceCharacterization& characterization) const { + auto direct = fDevice->recordingContext()->asDirectContext(); + if (!direct) { + return false; + } + + if (!characterization.isValid()) { + return false; + } + + if (characterization.vulkanSecondaryCBCompatible()) { + return false; + } + + SkImageInfo ii = fDevice->imageInfo(); + if (ii.colorType() == kUnknown_SkColorType) { + return false; + } + + GrSurfaceProxyView targetView = fDevice->readSurfaceView(); + // As long as the current state if the context allows for greater or equal resources, + // we allow the DDL to be replayed. + // DDL TODO: should we just remove the resource check and ignore the cache limits on playback? + size_t maxResourceBytes = direct->getResourceCacheLimit(); + + if (characterization.isTextureable()) { + if (!targetView.asTextureProxy()) { + // If the characterization was textureable we require the replay dest to also be + // textureable. If the characterized surface wasn't textureable we allow the replay + // dest to be textureable. + return false; + } + + if (characterization.isMipMapped() && + GrMipmapped::kNo == targetView.asTextureProxy()->mipmapped()) { + // Fail if the DDL's surface was mipmapped but the replay surface is not. + // Allow drawing to proceed if the DDL was not mipmapped but the replay surface is. + return false; + } + } + + if (characterization.usesGLFBO0() != targetView.asRenderTargetProxy()->glRTFBOIDIs0()) { + // FBO0-ness effects how MSAA and window rectangles work. If the characterization was + // tagged as FBO0 it would never have been allowed to use window rectangles. If MSAA + // was also never used then a DDL recorded with this characterization should be replayable + // on a non-FBO0 surface. + if (!characterization.usesGLFBO0() || characterization.sampleCount() > 1) { + return false; + } + } + + GrBackendFormat format = targetView.asRenderTargetProxy()->backendFormat(); + int numSamples = targetView.asRenderTargetProxy()->numSamples(); + GrProtected isProtected = targetView.proxy()->isProtected(); + + return characterization.contextInfo() && + characterization.contextInfo()->priv().matches(direct) && + characterization.cacheMaxResourceBytes() <= maxResourceBytes && + characterization.origin() == targetView.origin() && + characterization.backendFormat() == format && + characterization.width() == ii.width() && + characterization.height() == ii.height() && + characterization.colorType() == ii.colorType() && + characterization.sampleCount() == numSamples && + SkColorSpace::Equals(characterization.colorSpace(), ii.colorInfo().colorSpace()) && + characterization.isProtected() == isProtected && + characterization.surfaceProps() == fDevice->surfaceProps(); +} + +bool SkSurface_Gpu::onDraw(sk_sp ddl, SkIPoint offset) { + if (!ddl || !this->isCompatible(ddl->characterization())) { + return false; + } + + auto direct = fDevice->recordingContext()->asDirectContext(); + if (!direct || direct->abandoned()) { + return false; + } + + GrSurfaceProxyView view = fDevice->readSurfaceView(); + + direct->priv().createDDLTask(std::move(ddl), view.asRenderTargetProxyRef(), offset); + return true; +} + +sk_sp SkSurface_Gpu::onCapabilities() { + return fDevice->recordingContext()->skCapabilities(); +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkSurface::MakeRenderTarget(GrRecordingContext* rContext, + const SkSurfaceCharacterization& c, + skgpu::Budgeted budgeted) { + if (!rContext || !c.isValid()) { + return nullptr; + } + + if (c.usesGLFBO0()) { + // If we are making the surface we will never use FBO0. + return nullptr; + } + + if (c.vulkanSecondaryCBCompatible()) { + return nullptr; + } + + auto device = rContext->priv().createDevice(budgeted, + c.imageInfo(), + SkBackingFit::kExact, + c.sampleCount(), + GrMipmapped(c.isMipMapped()), + c.isProtected(), + c.origin(), + c.surfaceProps(), + skgpu::ganesh::Device::InitContents::kClear); + if (!device) { + return nullptr; + } + + sk_sp result = sk_make_sp(std::move(device)); +#ifdef SK_DEBUG + if (result) { + SkASSERT(result->isCompatible(c)); + } +#endif + + return result; +} + +static bool validate_backend_texture(const GrCaps* caps, const GrBackendTexture& tex, + int sampleCnt, GrColorType grCT, + bool texturable) { + if (!tex.isValid()) { + return false; + } + + GrBackendFormat backendFormat = tex.getBackendFormat(); + if (!backendFormat.isValid()) { + RENDERENGINE_ABORTF("%s failed due to an invalid format", __func__); + return false; + } + + if (!caps->areColorTypeAndFormatCompatible(grCT, backendFormat)) { + RENDERENGINE_ABORTF("%s failed due to an invalid format and colorType combination", + __func__); + return false; + } + + if (!caps->isFormatAsColorTypeRenderable(grCT, backendFormat, sampleCnt)) { + RENDERENGINE_ABORTF( + "%s failed due to no supported rendering path for the selected " + "format and colorType", + __func__); + return false; + } + + if (texturable && !caps->isFormatTexturable(backendFormat, tex.textureType())) { + RENDERENGINE_ABORTF( + "%s failed due to no texturing support for the selected format and " + "colorType", + __func__); + return false; + } + + return true; +} + +sk_sp SkSurface::MakeRenderTarget(GrRecordingContext* rContext, + skgpu::Budgeted budgeted, + const SkImageInfo& info, + int sampleCount, + GrSurfaceOrigin origin, + const SkSurfaceProps* props, + bool shouldCreateWithMips) { + if (!rContext) { + return nullptr; + } + sampleCount = std::max(1, sampleCount); + GrMipmapped mipmapped = shouldCreateWithMips ? GrMipmapped::kYes : GrMipmapped::kNo; + + if (!rContext->priv().caps()->mipmapSupport()) { + mipmapped = GrMipmapped::kNo; + } + + auto device = rContext->priv().createDevice(budgeted, + info, + SkBackingFit::kExact, + sampleCount, + mipmapped, + GrProtected::kNo, + origin, + SkSurfacePropsCopyOrDefault(props), + skgpu::ganesh::Device::InitContents::kClear); + if (!device) { + return nullptr; + } + return sk_make_sp(std::move(device)); +} + +sk_sp SkSurface::MakeFromBackendTexture(GrRecordingContext* rContext, + const GrBackendTexture& tex, + GrSurfaceOrigin origin, + int sampleCnt, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* props, + SkSurface::TextureReleaseProc textureReleaseProc, + SkSurface::ReleaseContext releaseContext) { + auto releaseHelper = skgpu::RefCntedCallback::Make(textureReleaseProc, releaseContext); + + if (!rContext) { + RENDERENGINE_ABORTF("%s failed due to a null context ", __func__); + return nullptr; + } + sampleCnt = std::max(1, sampleCnt); + + GrColorType grColorType = SkColorTypeToGrColorType(colorType); + if (grColorType == GrColorType::kUnknown) { + RENDERENGINE_ABORTF( + "%s failed due to an unsupported colorType %d", __func__, colorType); + return nullptr; + } + + if (!validate_backend_texture(rContext->priv().caps(), tex, sampleCnt, grColorType, true)) { + return nullptr; + } + + sk_sp proxy(rContext->priv().proxyProvider()->wrapRenderableBackendTexture( + tex, sampleCnt, kBorrow_GrWrapOwnership, GrWrapCacheable::kNo, + std::move(releaseHelper))); + if (!proxy) { +#ifdef SK_IN_RENDERENGINE + GrGLTextureInfo textureInfo; + bool retrievedTextureInfo = tex.getGLTextureInfo(&textureInfo); + RENDERENGINE_ABORTF("%s failed to wrap the texture into a renderable target " + "\n\tGrBackendTexture: (%i x %i) hasMipmaps: %i isProtected: %i texType: %i" + "\n\t\tGrGLTextureInfo: success: %i fTarget: %u fFormat: %u" + "\n\tmaxRenderTargetSize: %d", + __func__, tex.width(), tex.height(), tex.hasMipmaps(), + tex.isProtected(), static_cast(tex.textureType()), + retrievedTextureInfo, textureInfo.fTarget, textureInfo.fFormat, + rContext->priv().caps()->maxRenderTargetSize()); +#endif + return nullptr; + } + + auto device = rContext->priv().createDevice(grColorType, + std::move(proxy), + std::move(colorSpace), + origin, + SkSurfacePropsCopyOrDefault(props), + skgpu::ganesh::Device::InitContents::kUninit); + if (!device) { + RENDERENGINE_ABORTF("%s failed to wrap the renderTarget into a surface", __func__); + return nullptr; + } + + return sk_make_sp(std::move(device)); +} + +bool SkSurface_Gpu::onReplaceBackendTexture(const GrBackendTexture& backendTexture, + GrSurfaceOrigin origin, + ContentChangeMode mode, + TextureReleaseProc releaseProc, + ReleaseContext releaseContext) { + auto releaseHelper = skgpu::RefCntedCallback::Make(releaseProc, releaseContext); + + auto rContext = fDevice->recordingContext(); + if (rContext->abandoned()) { + return false; + } + if (!backendTexture.isValid()) { + return false; + } + if (backendTexture.width() != this->width() || backendTexture.height() != this->height()) { + return false; + } + auto* oldRTP = fDevice->targetProxy(); + auto oldProxy = sk_ref_sp(oldRTP->asTextureProxy()); + if (!oldProxy) { + return false; + } + auto* oldTexture = oldProxy->peekTexture(); + if (!oldTexture) { + return false; + } + if (!oldTexture->resourcePriv().refsWrappedObjects()) { + return false; + } + if (oldTexture->backendFormat() != backendTexture.getBackendFormat()) { + return false; + } + if (oldTexture->getBackendTexture().isSameTexture(backendTexture)) { + return false; + } + SkASSERT(oldTexture->asRenderTarget()); + int sampleCnt = oldTexture->asRenderTarget()->numSamples(); + GrColorType grColorType = SkColorTypeToGrColorType(this->getCanvas()->imageInfo().colorType()); + if (!validate_backend_texture(rContext->priv().caps(), backendTexture, + sampleCnt, grColorType, true)) { + return false; + } + + sk_sp colorSpace = fDevice->imageInfo().refColorSpace(); + + SkASSERT(sampleCnt > 0); + sk_sp proxy(rContext->priv().proxyProvider()->wrapRenderableBackendTexture( + backendTexture, sampleCnt, kBorrow_GrWrapOwnership, GrWrapCacheable::kNo, + std::move(releaseHelper))); + if (!proxy) { + return false; + } + + return fDevice->replaceBackingProxy(mode, sk_ref_sp(proxy->asRenderTargetProxy()), grColorType, + std::move(colorSpace), origin, this->props()); +} + +bool validate_backend_render_target(const GrCaps* caps, const GrBackendRenderTarget& rt, + GrColorType grCT) { + if (!caps->areColorTypeAndFormatCompatible(grCT, rt.getBackendFormat())) { + return false; + } + + if (!caps->isFormatAsColorTypeRenderable(grCT, rt.getBackendFormat(), rt.sampleCnt())) { + return false; + } + + // We require the stencil bits to be either 0, 8, or 16. + int stencilBits = rt.stencilBits(); + if (stencilBits != 0 && stencilBits != 8 && stencilBits != 16) { + return false; + } + + return true; +} + +sk_sp SkSurface::MakeFromBackendRenderTarget(GrRecordingContext* rContext, + const GrBackendRenderTarget& rt, + GrSurfaceOrigin origin, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* props, + SkSurface::RenderTargetReleaseProc relProc, + SkSurface::ReleaseContext releaseContext) { + auto releaseHelper = skgpu::RefCntedCallback::Make(relProc, releaseContext); + + if (!rContext) { + return nullptr; + } + + GrColorType grColorType = SkColorTypeToGrColorType(colorType); + if (grColorType == GrColorType::kUnknown) { + return nullptr; + } + + if (!validate_backend_render_target(rContext->priv().caps(), rt, grColorType)) { + return nullptr; + } + + auto proxyProvider = rContext->priv().proxyProvider(); + auto proxy = proxyProvider->wrapBackendRenderTarget(rt, std::move(releaseHelper)); + if (!proxy) { + return nullptr; + } + + auto device = rContext->priv().createDevice(grColorType, + std::move(proxy), + std::move(colorSpace), + origin, + SkSurfacePropsCopyOrDefault(props), + skgpu::ganesh::Device::InitContents::kUninit); + if (!device) { + return nullptr; + } + + return sk_make_sp(std::move(device)); +} + +#if defined(SK_BUILD_FOR_ANDROID) && __ANDROID_API__ >= 26 +sk_sp SkSurface::MakeFromAHardwareBuffer(GrDirectContext* dContext, + AHardwareBuffer* hardwareBuffer, + GrSurfaceOrigin origin, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + , bool fromWindow +#endif + ) { + AHardwareBuffer_Desc bufferDesc; + AHardwareBuffer_describe(hardwareBuffer, &bufferDesc); + + if (!SkToBool(bufferDesc.usage & AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT)) { + return nullptr; + } + + bool isTextureable = SkToBool(bufferDesc.usage & AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE); + + GrBackendFormat backendFormat = GrAHardwareBufferUtils::GetBackendFormat(dContext, + hardwareBuffer, + bufferDesc.format, + true); + if (!backendFormat.isValid()) { + return nullptr; + } + + if (isTextureable) { + GrAHardwareBufferUtils::DeleteImageProc deleteImageProc = nullptr; + GrAHardwareBufferUtils::UpdateImageProc updateImageProc = nullptr; + GrAHardwareBufferUtils::TexImageCtx deleteImageCtx = nullptr; + + bool isProtectedContent = + SkToBool(bufferDesc.usage & AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT); + + bool fromWindowLocal = false; +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + fromWindowLocal = fromWindow; +#endif + + GrBackendTexture backendTexture = + GrAHardwareBufferUtils::MakeBackendTexture(dContext, + hardwareBuffer, + bufferDesc.width, + bufferDesc.height, + &deleteImageProc, + &updateImageProc, + &deleteImageCtx, + isProtectedContent, + backendFormat, + true, + fromWindowLocal); + if (!backendTexture.isValid()) { + return nullptr; + } + + SkColorType colorType = + GrAHardwareBufferUtils::GetSkColorTypeFromBufferFormat(bufferDesc.format); + + sk_sp surface = SkSurface::MakeFromBackendTexture(dContext, backendTexture, + origin, 0, colorType, std::move(colorSpace), surfaceProps, deleteImageProc, + deleteImageCtx); + + if (!surface) { + SkASSERT(deleteImageProc); + deleteImageProc(deleteImageCtx); + } + + return surface; + } else { + return nullptr; + } +} +#endif + +void SkSurface::flushAndSubmit(bool syncCpu) { + this->flush(BackendSurfaceAccess::kNoAccess, GrFlushInfo()); + + auto direct = GrAsDirectContext(this->recordingContext()); + if (direct) { + direct->submit(syncCpu); + } +} + +#endif diff --git a/gfx/skia/skia/src/image/SkSurface_Gpu.h b/gfx/skia/skia/src/image/SkSurface_Gpu.h new file mode 100644 index 0000000000..71bc2c5983 --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_Gpu.h @@ -0,0 +1,99 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSurface_Gpu_DEFINED +#define SkSurface_Gpu_DEFINED + +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "include/gpu/GrBackendSurface.h" +#include "src/image/SkSurface_Base.h" + +class GrBackendSemaphore; +class GrRecordingContext; +class SkCanvas; +class SkCapabilities; +class SkColorSpace; +class SkDeferredDisplayList; +class SkImage; +class SkPaint; +class SkPixmap; +class SkSurface; +class SkSurfaceCharacterization; +enum GrSurfaceOrigin : int; +enum class GrSemaphoresSubmitted : bool; +namespace skgpu { class MutableTextureState; } +namespace skgpu { +namespace ganesh { +class Device; +} +} // namespace skgpu +struct GrFlushInfo; +struct SkIPoint; +struct SkIRect; +struct SkISize; + +class SkSurface_Gpu : public SkSurface_Base { +public: + SkSurface_Gpu(sk_sp); + ~SkSurface_Gpu() override; + + SkImageInfo imageInfo() const override; + + GrRecordingContext* onGetRecordingContext() override; + + GrBackendTexture onGetBackendTexture(BackendHandleAccess) override; + GrBackendRenderTarget onGetBackendRenderTarget(BackendHandleAccess) override; + bool onReplaceBackendTexture(const GrBackendTexture&, GrSurfaceOrigin, ContentChangeMode, TextureReleaseProc, + ReleaseContext) override; + + SkCanvas* onNewCanvas() override; + sk_sp onNewSurface(const SkImageInfo&) override; + sk_sp onNewImageSnapshot(const SkIRect* subset) override; + void onWritePixels(const SkPixmap&, int x, int y) override; + void onAsyncRescaleAndReadPixels(const SkImageInfo& info, SkIRect srcRect, + RescaleGamma rescaleGamma, RescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) override; + void onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace yuvColorSpace, + sk_sp dstColorSpace, + SkIRect srcRect, + SkISize dstSize, + RescaleGamma rescaleGamma, + RescaleMode, + ReadPixelsCallback callback, + ReadPixelsContext context) override; + bool onCopyOnWrite(ContentChangeMode) override; + void onDiscard() override; + void onResolveMSAA() override; + GrSemaphoresSubmitted onFlush(BackendSurfaceAccess access, const GrFlushInfo& info, + const skgpu::MutableTextureState*) override; + bool onWait(int numSemaphores, const GrBackendSemaphore* waitSemaphores, + bool deleteSemaphoresAfterWait) override; + bool onCharacterize(SkSurfaceCharacterization*) const override; + bool onIsCompatible(const SkSurfaceCharacterization&) const override; + void onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkSamplingOptions&, + const SkPaint* paint) override; + bool onDraw(sk_sp, SkIPoint offset) override; + + sk_sp onCapabilities() override; + skgpu::ganesh::Device* getDevice(); + +private: + sk_sp fDevice; + + using INHERITED = SkSurface_Base; +}; + +#endif // defined(SK_GANESH) + +#endif // SkSurface_Gpu_DEFINED diff --git a/gfx/skia/skia/src/image/SkSurface_GpuMtl.mm b/gfx/skia/skia/src/image/SkSurface_GpuMtl.mm new file mode 100644 index 0000000000..cad448ae80 --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_GpuMtl.mm @@ -0,0 +1,169 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkRefCnt.h" +#include "include/core/SkSurface.h" +#include "include/gpu/GrBackendSurface.h" +#include "include/gpu/mtl/GrMtlTypes.h" +#include "src/gpu/ganesh/GrProxyProvider.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/GrResourceProvider.h" +#include "src/gpu/ganesh/GrResourceProviderPriv.h" +#include "src/gpu/ganesh/SurfaceDrawContext.h" +#include "src/image/SkSurface_Gpu.h" + +#if defined(SK_GANESH) + +#include "src/gpu/ganesh/GrSurface.h" +#include "src/gpu/ganesh/mtl/GrMtlTextureRenderTarget.h" + +#ifdef SK_METAL +#import +#import +#import + +sk_sp SkSurface::MakeFromCAMetalLayer(GrRecordingContext* rContext, + GrMTLHandle layer, + GrSurfaceOrigin origin, + int sampleCnt, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps, + GrMTLHandle* drawable) { + GrProxyProvider* proxyProvider = rContext->priv().proxyProvider(); + + CAMetalLayer* metalLayer = (__bridge CAMetalLayer*)layer; + GrBackendFormat backendFormat = GrBackendFormat::MakeMtl(metalLayer.pixelFormat); + + GrColorType grColorType = SkColorTypeToGrColorType(colorType); + + SkISize dims = {(int)metalLayer.drawableSize.width, (int)metalLayer.drawableSize.height}; + + GrProxyProvider::TextureInfo texInfo; + texInfo.fMipmapped = GrMipmapped::kNo; + texInfo.fTextureType = GrTextureType::k2D; + + sk_sp proxy = proxyProvider->createLazyRenderTargetProxy( + [layer, drawable](GrResourceProvider* resourceProvider, + const GrSurfaceProxy::LazySurfaceDesc& desc) { + CAMetalLayer* metalLayer = (__bridge CAMetalLayer*)layer; + id currentDrawable = [metalLayer nextDrawable]; + + GrMtlGpu* mtlGpu = (GrMtlGpu*) resourceProvider->priv().gpu(); + sk_sp surface; + if (metalLayer.framebufferOnly) { + surface = GrMtlRenderTarget::MakeWrappedRenderTarget( + mtlGpu, desc.fDimensions, desc.fSampleCnt, currentDrawable.texture); + } else { + surface = GrMtlTextureRenderTarget::MakeWrappedTextureRenderTarget( + mtlGpu, desc.fDimensions, desc.fSampleCnt, currentDrawable.texture, + GrWrapCacheable::kNo); + } + if (surface && desc.fSampleCnt > 1) { + surface->setRequiresManualMSAAResolve(); + } + + *drawable = (__bridge_retained GrMTLHandle) currentDrawable; + return GrSurfaceProxy::LazyCallbackResult(std::move(surface)); + }, + backendFormat, + dims, + sampleCnt, + sampleCnt > 1 ? GrInternalSurfaceFlags::kRequiresManualMSAAResolve + : GrInternalSurfaceFlags::kNone, + metalLayer.framebufferOnly ? nullptr : &texInfo, + GrMipmapStatus::kNotAllocated, + SkBackingFit::kExact, + skgpu::Budgeted::kYes, + GrProtected::kNo, + false, + GrSurfaceProxy::UseAllocator::kYes); + + auto device = rContext->priv().createDevice(grColorType, + std::move(proxy), + std::move(colorSpace), + origin, + SkSurfacePropsCopyOrDefault(surfaceProps), + skgpu::ganesh::Device::InitContents::kUninit); + if (!device) { + return nullptr; + } + + return sk_make_sp(std::move(device)); +} + +sk_sp SkSurface::MakeFromMTKView(GrRecordingContext* rContext, + GrMTLHandle view, + GrSurfaceOrigin origin, + int sampleCnt, + SkColorType colorType, + sk_sp colorSpace, + const SkSurfaceProps* surfaceProps) { + GrProxyProvider* proxyProvider = rContext->priv().proxyProvider(); + + MTKView* mtkView = (__bridge MTKView*)view; + GrBackendFormat backendFormat = GrBackendFormat::MakeMtl(mtkView.colorPixelFormat); + + GrColorType grColorType = SkColorTypeToGrColorType(colorType); + + SkISize dims = {(int)mtkView.drawableSize.width, (int)mtkView.drawableSize.height}; + + GrProxyProvider::TextureInfo texInfo; + texInfo.fMipmapped = GrMipmapped::kNo; + texInfo.fTextureType = GrTextureType::k2D; + + sk_sp proxy = proxyProvider->createLazyRenderTargetProxy( + [view](GrResourceProvider* resourceProvider, + const GrSurfaceProxy::LazySurfaceDesc& desc) { + MTKView* mtkView = (__bridge MTKView*)view; + id currentDrawable = [mtkView currentDrawable]; + + GrMtlGpu* mtlGpu = (GrMtlGpu*) resourceProvider->priv().gpu(); + sk_sp surface; + if (mtkView.framebufferOnly) { + surface = GrMtlRenderTarget::MakeWrappedRenderTarget( + mtlGpu, desc.fDimensions, desc.fSampleCnt, currentDrawable.texture); + } else { + surface = GrMtlTextureRenderTarget::MakeWrappedTextureRenderTarget( + mtlGpu, desc.fDimensions, desc.fSampleCnt, currentDrawable.texture, + GrWrapCacheable::kNo); + } + if (surface && desc.fSampleCnt > 1) { + surface->setRequiresManualMSAAResolve(); + } + + return GrSurfaceProxy::LazyCallbackResult(std::move(surface)); + }, + backendFormat, + dims, + sampleCnt, + sampleCnt > 1 ? GrInternalSurfaceFlags::kRequiresManualMSAAResolve + : GrInternalSurfaceFlags::kNone, + mtkView.framebufferOnly ? nullptr : &texInfo, + GrMipmapStatus::kNotAllocated, + SkBackingFit::kExact, + skgpu::Budgeted::kYes, + GrProtected::kNo, + false, + GrSurfaceProxy::UseAllocator::kYes); + + auto device = rContext->priv().createDevice(grColorType, + std::move(proxy), + std::move(colorSpace), + origin, + SkSurfacePropsCopyOrDefault(surfaceProps), + skgpu::ganesh::Device::InitContents::kUninit); + if (!device) { + return nullptr; + } + + return sk_make_sp(std::move(device)); +} + +#endif + +#endif diff --git a/gfx/skia/skia/src/image/SkSurface_Null.cpp b/gfx/skia/skia/src/image/SkSurface_Null.cpp new file mode 100644 index 0000000000..099a1c86bc --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_Null.cpp @@ -0,0 +1,52 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCapabilities.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSurface.h" +#include "include/utils/SkNoDrawCanvas.h" +#include "src/image/SkSurface_Base.h" + +class SkCanvas; +class SkPaint; +class SkPixmap; +struct SkIRect; +struct SkSamplingOptions; + +class SkNullSurface : public SkSurface_Base { +public: + SkNullSurface(int width, int height) : SkSurface_Base(width, height, nullptr) {} + +protected: + SkCanvas* onNewCanvas() override { + return new SkNoDrawCanvas(this->width(), this->height()); + } + sk_sp onNewSurface(const SkImageInfo& info) override { + return MakeNull(info.width(), info.height()); + } + sk_sp onNewImageSnapshot(const SkIRect* subsetOrNull) override { return nullptr; } + void onWritePixels(const SkPixmap&, int x, int y) override {} + void onDraw(SkCanvas*, SkScalar, SkScalar, const SkSamplingOptions&, const SkPaint*) override {} + bool onCopyOnWrite(ContentChangeMode) override { return true; } + sk_sp onCapabilities() override { + // Not really, but we have to return *something* + return SkCapabilities::RasterBackend(); + } + SkImageInfo imageInfo() const override { + return SkImageInfo::MakeUnknown(this->width(), this->height()); + } +}; + +sk_sp SkSurface::MakeNull(int width, int height) { + if (width < 1 || height < 1) { + return nullptr; + } + return sk_sp(new SkNullSurface(width, height)); +} diff --git a/gfx/skia/skia/src/image/SkSurface_Raster.cpp b/gfx/skia/skia/src/image/SkSurface_Raster.cpp new file mode 100644 index 0000000000..c8a844f994 --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_Raster.cpp @@ -0,0 +1,199 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/image/SkSurface_Raster.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkCapabilities.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMallocPixelRef.h" +#include "include/core/SkPixelRef.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkSurface.h" +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkMath.h" +#include "src/core/SkDevice.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkSurfacePriv.h" + +#include +#include +#include + +class SkImage; +class SkPaint; +class SkPixmap; +class SkSurfaceProps; + +bool SkSurfaceValidateRasterInfo(const SkImageInfo& info, size_t rowBytes) { + if (!SkImageInfoIsValid(info)) { + return false; + } + + if (kIgnoreRowBytesValue == rowBytes) { + return true; + } + + if (!info.validRowBytes(rowBytes)) { + return false; + } + + uint64_t size = sk_64_mul(info.height(), rowBytes); + static const size_t kMaxTotalSize = SK_MaxS32; + if (size > kMaxTotalSize) { + return false; + } + + return true; +} + +SkSurface_Raster::SkSurface_Raster(const SkImageInfo& info, void* pixels, size_t rb, + void (*releaseProc)(void* pixels, void* context), void* context, + const SkSurfaceProps* props) + : INHERITED(info, props) +{ + fBitmap.installPixels(info, pixels, rb, releaseProc, context); + fWeOwnThePixels = false; // We are "Direct" +} + +SkSurface_Raster::SkSurface_Raster(const SkImageInfo& info, sk_sp pr, + const SkSurfaceProps* props) + : INHERITED(pr->width(), pr->height(), props) +{ + fBitmap.setInfo(info, pr->rowBytes()); + fBitmap.setPixelRef(std::move(pr), 0, 0); + fWeOwnThePixels = true; +} + +SkCanvas* SkSurface_Raster::onNewCanvas() { return new SkCanvas(fBitmap, this->props()); } + +sk_sp SkSurface_Raster::onNewSurface(const SkImageInfo& info) { + return SkSurface::MakeRaster(info, &this->props()); +} + +void SkSurface_Raster::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y, + const SkSamplingOptions& sampling, const SkPaint* paint) { + canvas->drawImage(fBitmap.asImage().get(), x, y, sampling, paint); +} + +sk_sp SkSurface_Raster::onNewImageSnapshot(const SkIRect* subset) { + if (subset) { + SkASSERT(SkIRect::MakeWH(fBitmap.width(), fBitmap.height()).contains(*subset)); + SkBitmap dst; + dst.allocPixels(fBitmap.info().makeDimensions(subset->size())); + SkAssertResult(fBitmap.readPixels(dst.pixmap(), subset->left(), subset->top())); + dst.setImmutable(); // key, so MakeFromBitmap doesn't make a copy of the buffer + return dst.asImage(); + } + + SkCopyPixelsMode cpm = kIfMutable_SkCopyPixelsMode; + if (fWeOwnThePixels) { + // SkImage_raster requires these pixels are immutable for its full lifetime. + // We'll undo this via onRestoreBackingMutability() if we can avoid the COW. + if (SkPixelRef* pr = fBitmap.pixelRef()) { + pr->setTemporarilyImmutable(); + } + } else { + cpm = kAlways_SkCopyPixelsMode; + } + + // Our pixels are in memory, so read access on the snapshot SkImage could be cheap. + // Lock the shared pixel ref to ensure peekPixels() is usable. + return SkMakeImageFromRasterBitmap(fBitmap, cpm); +} + +void SkSurface_Raster::onWritePixels(const SkPixmap& src, int x, int y) { + fBitmap.writePixels(src, x, y); +} + +void SkSurface_Raster::onRestoreBackingMutability() { + SkASSERT(!this->hasCachedImage()); // Shouldn't be any snapshots out there. + if (SkPixelRef* pr = fBitmap.pixelRef()) { + pr->restoreMutability(); + } +} + +bool SkSurface_Raster::onCopyOnWrite(ContentChangeMode mode) { + // are we sharing pixelrefs with the image? + sk_sp cached(this->refCachedImage()); + SkASSERT(cached); + if (SkBitmapImageGetPixelRef(cached.get()) == fBitmap.pixelRef()) { + SkASSERT(fWeOwnThePixels); + if (kDiscard_ContentChangeMode == mode) { + if (!fBitmap.tryAllocPixels()) { + return false; + } + } else { + SkBitmap prev(fBitmap); + if (!fBitmap.tryAllocPixels()) { + return false; + } + SkASSERT(prev.info() == fBitmap.info()); + SkASSERT(prev.rowBytes() == fBitmap.rowBytes()); + memcpy(fBitmap.getPixels(), prev.getPixels(), fBitmap.computeByteSize()); + } + + // Now fBitmap is a deep copy of itself (and therefore different from + // what is being used by the image. Next we update the canvas to use + // this as its backend, so we can't modify the image's pixels anymore. + SkASSERT(this->getCachedCanvas()); + this->getCachedCanvas()->baseDevice()->replaceBitmapBackendForRasterSurface(fBitmap); + } + return true; +} + +sk_sp SkSurface_Raster::onCapabilities() { + return SkCapabilities::RasterBackend(); +} + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkSurface::MakeRasterDirectReleaseProc(const SkImageInfo& info, void* pixels, + size_t rb, void (*releaseProc)(void* pixels, void* context), void* context, + const SkSurfaceProps* props) { + if (nullptr == releaseProc) { + context = nullptr; + } + if (!SkSurfaceValidateRasterInfo(info, rb)) { + return nullptr; + } + if (nullptr == pixels) { + return nullptr; + } + + return sk_make_sp(info, pixels, rb, releaseProc, context, props); +} + +sk_sp SkSurface::MakeRasterDirect(const SkImageInfo& info, void* pixels, size_t rowBytes, + const SkSurfaceProps* props) { + return MakeRasterDirectReleaseProc(info, pixels, rowBytes, nullptr, nullptr, props); +} + +sk_sp SkSurface::MakeRaster(const SkImageInfo& info, size_t rowBytes, + const SkSurfaceProps* props) { + if (!SkSurfaceValidateRasterInfo(info)) { + return nullptr; + } + + sk_sp pr = SkMallocPixelRef::MakeAllocate(info, rowBytes); + if (!pr) { + return nullptr; + } + if (rowBytes) { + SkASSERT(pr->rowBytes() == rowBytes); + } + return sk_make_sp(info, std::move(pr), props); +} + +sk_sp SkSurface::MakeRasterN32Premul(int width, int height, + const SkSurfaceProps* surfaceProps) { + return MakeRaster(SkImageInfo::MakeN32Premul(width, height), surfaceProps); +} diff --git a/gfx/skia/skia/src/image/SkSurface_Raster.h b/gfx/skia/skia/src/image/SkSurface_Raster.h new file mode 100644 index 0000000000..14ca2aaafd --- /dev/null +++ b/gfx/skia/skia/src/image/SkSurface_Raster.h @@ -0,0 +1,55 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSurface_Raster_DEFINED +#define SkSurface_Raster_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkScalar.h" +#include "src/image/SkSurface_Base.h" + +#include + +class SkCanvas; +class SkCapabilities; +class SkImage; +class SkPaint; +class SkPixelRef; +class SkPixmap; +class SkSurface; +class SkSurfaceProps; +struct SkIRect; + +class SkSurface_Raster : public SkSurface_Base { +public: + SkSurface_Raster(const SkImageInfo&, void*, size_t rb, + void (*releaseProc)(void* pixels, void* context), void* context, + const SkSurfaceProps*); + SkSurface_Raster(const SkImageInfo& info, sk_sp, const SkSurfaceProps*); + + SkImageInfo imageInfo() const override { return fBitmap.info(); } + + SkCanvas* onNewCanvas() override; + sk_sp onNewSurface(const SkImageInfo&) override; + sk_sp onNewImageSnapshot(const SkIRect* subset) override; + void onWritePixels(const SkPixmap&, int x, int y) override; + void onDraw(SkCanvas*, SkScalar, SkScalar, const SkSamplingOptions&, const SkPaint*) override; + bool onCopyOnWrite(ContentChangeMode) override; + void onRestoreBackingMutability() override; + sk_sp onCapabilities() override; + +private: + SkBitmap fBitmap; + bool fWeOwnThePixels; + + using INHERITED = SkSurface_Base; +}; + +#endif diff --git a/gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.cpp b/gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.cpp new file mode 100644 index 0000000000..9184851b13 --- /dev/null +++ b/gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.cpp @@ -0,0 +1,242 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/chromium/SkDiscardableMemory.h" +#include "src/base/SkTInternalLList.h" +#include "src/lazy/SkDiscardableMemoryPool.h" + +using namespace skia_private; + +// Note: +// A PoolDiscardableMemory is memory that is counted in a pool. +// A DiscardableMemoryPool is a pool of PoolDiscardableMemorys. + +namespace { + +class PoolDiscardableMemory; + +/** + * This non-global pool can be used for unit tests to verify that the + * pool works. + */ +class DiscardableMemoryPool : public SkDiscardableMemoryPool { +public: + DiscardableMemoryPool(size_t budget); + ~DiscardableMemoryPool() override; + + std::unique_ptr make(size_t bytes); + SkDiscardableMemory* create(size_t bytes) override { + return this->make(bytes).release(); // TODO: change API + } + + size_t getRAMUsed() override; + void setRAMBudget(size_t budget) override; + size_t getRAMBudget() override { return fBudget; } + + /** purges all unlocked DMs */ + void dumpPool() override; + + #if SK_LAZY_CACHE_STATS // Defined in SkDiscardableMemoryPool.h + int getCacheHits() override { return fCacheHits; } + int getCacheMisses() override { return fCacheMisses; } + void resetCacheHitsAndMisses() override { + fCacheHits = fCacheMisses = 0; + } + int fCacheHits; + int fCacheMisses; + #endif // SK_LAZY_CACHE_STATS + +private: + SkMutex fMutex; + size_t fBudget; + size_t fUsed; + SkTInternalLList fList; + + /** Function called to free memory if needed */ + void dumpDownTo(size_t budget); + /** called by DiscardableMemoryPool upon destruction */ + void removeFromPool(PoolDiscardableMemory* dm); + /** called by DiscardableMemoryPool::lock() */ + bool lock(PoolDiscardableMemory* dm); + /** called by DiscardableMemoryPool::unlock() */ + void unlock(PoolDiscardableMemory* dm); + + friend class PoolDiscardableMemory; + + using INHERITED = SkDiscardableMemory::Factory; +}; + +/** + * A PoolDiscardableMemory is a SkDiscardableMemory that relies on + * a DiscardableMemoryPool object to manage the memory. + */ +class PoolDiscardableMemory : public SkDiscardableMemory { +public: + PoolDiscardableMemory(sk_sp pool, UniqueVoidPtr pointer, size_t bytes); + ~PoolDiscardableMemory() override; + bool lock() override; + void* data() override; + void unlock() override; + friend class DiscardableMemoryPool; +private: + SK_DECLARE_INTERNAL_LLIST_INTERFACE(PoolDiscardableMemory); + sk_sp fPool; + bool fLocked; + UniqueVoidPtr fPointer; + const size_t fBytes; +}; + +PoolDiscardableMemory::PoolDiscardableMemory(sk_sp pool, + UniqueVoidPtr pointer, + size_t bytes) + : fPool(std::move(pool)), fLocked(true), fPointer(std::move(pointer)), fBytes(bytes) { + SkASSERT(fPool != nullptr); + SkASSERT(fPointer != nullptr); + SkASSERT(fBytes > 0); +} + +PoolDiscardableMemory::~PoolDiscardableMemory() { + SkASSERT(!fLocked); // contract for SkDiscardableMemory + fPool->removeFromPool(this); +} + +bool PoolDiscardableMemory::lock() { + SkASSERT(!fLocked); // contract for SkDiscardableMemory + return fPool->lock(this); +} + +void* PoolDiscardableMemory::data() { + SkASSERT(fLocked); // contract for SkDiscardableMemory + return fPointer.get(); +} + +void PoolDiscardableMemory::unlock() { + SkASSERT(fLocked); // contract for SkDiscardableMemory + fPool->unlock(this); +} + +//////////////////////////////////////////////////////////////////////////////// + +DiscardableMemoryPool::DiscardableMemoryPool(size_t budget) + : fBudget(budget) + , fUsed(0) { + #if SK_LAZY_CACHE_STATS + fCacheHits = 0; + fCacheMisses = 0; + #endif // SK_LAZY_CACHE_STATS +} +DiscardableMemoryPool::~DiscardableMemoryPool() { + // PoolDiscardableMemory objects that belong to this pool are + // always deleted before deleting this pool since each one has a + // ref to the pool. + SkASSERT(fList.isEmpty()); +} + +void DiscardableMemoryPool::dumpDownTo(size_t budget) { + fMutex.assertHeld(); + if (fUsed <= budget) { + return; + } + using Iter = SkTInternalLList::Iter; + Iter iter; + PoolDiscardableMemory* cur = iter.init(fList, Iter::kTail_IterStart); + while ((fUsed > budget) && (cur)) { + if (!cur->fLocked) { + PoolDiscardableMemory* dm = cur; + SkASSERT(dm->fPointer != nullptr); + dm->fPointer = nullptr; + SkASSERT(fUsed >= dm->fBytes); + fUsed -= dm->fBytes; + cur = iter.prev(); + // Purged DMs are taken out of the list. This saves times + // looking them up. Purged DMs are NOT deleted. + fList.remove(dm); + } else { + cur = iter.prev(); + } + } +} + +std::unique_ptr DiscardableMemoryPool::make(size_t bytes) { + UniqueVoidPtr addr(sk_malloc_canfail(bytes)); + if (nullptr == addr) { + return nullptr; + } + auto dm = std::make_unique(sk_ref_sp(this), std::move(addr), bytes); + SkAutoMutexExclusive autoMutexAcquire(fMutex); + fList.addToHead(dm.get()); + fUsed += bytes; + this->dumpDownTo(fBudget); + return std::move(dm); +} + +void DiscardableMemoryPool::removeFromPool(PoolDiscardableMemory* dm) { + SkAutoMutexExclusive autoMutexAcquire(fMutex); + // This is called by dm's destructor. + if (dm->fPointer != nullptr) { + SkASSERT(fUsed >= dm->fBytes); + fUsed -= dm->fBytes; + fList.remove(dm); + } else { + SkASSERT(!fList.isInList(dm)); + } +} + +bool DiscardableMemoryPool::lock(PoolDiscardableMemory* dm) { + SkASSERT(dm != nullptr); + SkAutoMutexExclusive autoMutexAcquire(fMutex); + if (nullptr == dm->fPointer) { + // May have been purged while waiting for lock. + #if SK_LAZY_CACHE_STATS + ++fCacheMisses; + #endif // SK_LAZY_CACHE_STATS + return false; + } + dm->fLocked = true; + fList.remove(dm); + fList.addToHead(dm); + #if SK_LAZY_CACHE_STATS + ++fCacheHits; + #endif // SK_LAZY_CACHE_STATS + return true; +} + +void DiscardableMemoryPool::unlock(PoolDiscardableMemory* dm) { + SkASSERT(dm != nullptr); + SkAutoMutexExclusive autoMutexAcquire(fMutex); + dm->fLocked = false; + this->dumpDownTo(fBudget); +} + +size_t DiscardableMemoryPool::getRAMUsed() { + return fUsed; +} +void DiscardableMemoryPool::setRAMBudget(size_t budget) { + SkAutoMutexExclusive autoMutexAcquire(fMutex); + fBudget = budget; + this->dumpDownTo(fBudget); +} +void DiscardableMemoryPool::dumpPool() { + SkAutoMutexExclusive autoMutexAcquire(fMutex); + this->dumpDownTo(0); +} + +} // namespace + +sk_sp SkDiscardableMemoryPool::Make(size_t size) { + return sk_make_sp(size); +} + +SkDiscardableMemoryPool* SkGetGlobalDiscardableMemoryPool() { + // Intentionally leak this global pool. + static SkDiscardableMemoryPool* global = + new DiscardableMemoryPool(SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE); + return global; +} diff --git a/gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.h b/gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.h new file mode 100644 index 0000000000..61aedc279f --- /dev/null +++ b/gfx/skia/skia/src/lazy/SkDiscardableMemoryPool.h @@ -0,0 +1,65 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkDiscardableMemoryPool_DEFINED +#define SkDiscardableMemoryPool_DEFINED + +#include "include/private/base/SkMutex.h" +#include "include/private/chromium/SkDiscardableMemory.h" + +#ifndef SK_LAZY_CACHE_STATS + #ifdef SK_DEBUG + #define SK_LAZY_CACHE_STATS 1 + #else + #define SK_LAZY_CACHE_STATS 0 + #endif +#endif + +/** + * An implementation of Discardable Memory that manages a fixed-size + * budget of memory. When the allocated memory exceeds this size, + * unlocked blocks of memory are purged. If all memory is locked, it + * can exceed the memory-use budget. + */ +class SkDiscardableMemoryPool : public SkDiscardableMemory::Factory { +public: + virtual size_t getRAMUsed() = 0; + virtual void setRAMBudget(size_t budget) = 0; + virtual size_t getRAMBudget() = 0; + + /** purges all unlocked DMs */ + virtual void dumpPool() = 0; + + #if SK_LAZY_CACHE_STATS + /** + * These two values are a count of the number of successful and + * failed calls to SkDiscardableMemory::lock() for all DMs managed + * by this pool. + */ + virtual int getCacheHits() = 0; + virtual int getCacheMisses() = 0; + virtual void resetCacheHitsAndMisses() = 0; + #endif + + /** + * This non-global pool can be used for unit tests to verify that + * the pool works. + */ + static sk_sp Make(size_t size); +}; + +/** + * Returns (and creates if needed) a threadsafe global + * SkDiscardableMemoryPool. + */ +SkDiscardableMemoryPool* SkGetGlobalDiscardableMemoryPool(); + +#if !defined(SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE) +#define SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE (128 * 1024 * 1024) +#endif + +#endif // SkDiscardableMemoryPool_DEFINED diff --git a/gfx/skia/skia/src/opts/SkBitmapProcState_opts.h b/gfx/skia/skia/src/opts/SkBitmapProcState_opts.h new file mode 100644 index 0000000000..f2b04ab45c --- /dev/null +++ b/gfx/skia/skia/src/opts/SkBitmapProcState_opts.h @@ -0,0 +1,545 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBitmapProcState_opts_DEFINED +#define SkBitmapProcState_opts_DEFINED + +#include "src/base/SkMSAN.h" +#include "src/base/SkVx.h" +#include "src/core/SkBitmapProcState.h" + +// SkBitmapProcState optimized Shader, Sample, or Matrix procs. +// +// Only S32_alpha_D32_filter_DX exploits instructions beyond +// our common baseline SSE2/NEON instruction sets, so that's +// all that lives here. +// +// The rest are scattershot at the moment but I want to get them +// all migrated to be normal code inside SkBitmapProcState.cpp. + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #include +#elif defined(SK_ARM_HAS_NEON) + #include +#endif + +namespace SK_OPTS_NS { + +// This same basic packing scheme is used throughout the file. +template +static void decode_packed_coordinates_and_weight(U32 packed, Out* v0, Out* v1, Out* w) { + *v0 = (packed >> 18); // Integer coordinate x0 or y0. + *v1 = (packed & 0x3fff); // Integer coordinate x1 or y1. + *w = (packed >> 14) & 0xf; // Lerp weight for v1; weight for v0 is 16-w. +} + +#if 1 && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + /*not static*/ inline + void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, + const uint32_t* xy, int count, uint32_t* colors) { + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(s.fBilerp); + SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); + SkASSERT(s.fAlphaScale <= 256); + + // In a _DX variant only X varies; all samples share y0/y1 coordinates and wy weight. + int y0, y1, wy; + decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); + + const uint32_t* row0 = s.fPixmap.addr32(0,y0); + const uint32_t* row1 = s.fPixmap.addr32(0,y1); + + auto bilerp = [&](skvx::Vec<8,uint32_t> packed_x_coordinates) -> skvx::Vec<8,uint32_t> { + // Decode up to 8 output pixels' x-coordinates and weights. + skvx::Vec<8,uint32_t> x0,x1,wx; + decode_packed_coordinates_and_weight(packed_x_coordinates, &x0, &x1, &wx); + + // Splat wx to each color channel. + wx = (wx << 0) + | (wx << 8) + | (wx << 16) + | (wx << 24); + + auto gather = [](const uint32_t* ptr, skvx::Vec<8,uint32_t> ix) { + #if 1 + // Drop into AVX2 intrinsics for vpgatherdd. + return skvx::bit_pun>( + _mm256_i32gather_epi32((const int*)ptr, skvx::bit_pun<__m256i>(ix), 4)); + #else + // Portable version... sometimes I don't trust vpgatherdd. + return skvx::Vec<8,uint32_t>{ + ptr[ix[0]], ptr[ix[1]], ptr[ix[2]], ptr[ix[3]], + ptr[ix[4]], ptr[ix[5]], ptr[ix[6]], ptr[ix[7]], + }; + #endif + }; + + // Gather the 32 32-bit pixels that we'll bilerp into our 8 output pixels. + skvx::Vec<8,uint32_t> tl = gather(row0, x0), tr = gather(row0, x1), + bl = gather(row1, x0), br = gather(row1, x1); + + #if 1 + // We'll use _mm256_maddubs_epi16() to lerp much like in the SSSE3 code. + auto lerp_x = [&](skvx::Vec<8,uint32_t> L, skvx::Vec<8,uint32_t> R) { + __m256i l = skvx::bit_pun<__m256i>(L), + r = skvx::bit_pun<__m256i>(R), + wr = skvx::bit_pun<__m256i>(wx), + wl = _mm256_sub_epi8(_mm256_set1_epi8(16), wr); + + // Interlace l,r bytewise and line them up with their weights, then lerp. + __m256i lo = _mm256_maddubs_epi16(_mm256_unpacklo_epi8( l, r), + _mm256_unpacklo_epi8(wl,wr)); + __m256i hi = _mm256_maddubs_epi16(_mm256_unpackhi_epi8( l, r), + _mm256_unpackhi_epi8(wl,wr)); + + // Those _mm256_unpack??_epi8() calls left us in a bit of an odd order: + // + // if l = a b c d | e f g h + // and r = A B C D | E F G H + // + // then lo = a A b B | e E f F (low half of each input) + // and hi = c C d D | g G h H (high half of each input) + // + // To get everything back in original order we need to transpose that. + __m256i abcd = _mm256_permute2x128_si256(lo, hi, 0x20), + efgh = _mm256_permute2x128_si256(lo, hi, 0x31); + + return skvx::join(skvx::bit_pun>(abcd), + skvx::bit_pun>(efgh)); + }; + + skvx::Vec<32, uint16_t> top = lerp_x(tl, tr), + bot = lerp_x(bl, br), + sum = 16*top + (bot-top)*wy; + #else + // Treat 32-bit pixels as 4 8-bit values, and expand to 16-bit for room to multiply. + auto to_16x4 = [](auto v) -> skvx::Vec<32, uint16_t> { + return skvx::cast(skvx::bit_pun>(v)); + }; + + // Sum up weighted sample pixels. The naive, redundant math would be, + // + // sum = tl * (16-wy) * (16-wx) + // + bl * ( wy) * (16-wx) + // + tr * (16-wy) * ( wx) + // + br * ( wy) * ( wx) + // + // But we refactor to eliminate a bunch of those common factors. + auto lerp = [](auto lo, auto hi, auto w) { + return 16*lo + (hi-lo)*w; + }; + skvx::Vec<32, uint16_t> sum = lerp(lerp(to_16x4(tl), to_16x4(bl), wy), + lerp(to_16x4(tr), to_16x4(br), wy), to_16x4(wx)); + #endif + + // Get back to [0,255] by dividing by maximum weight 16x16 = 256. + sum >>= 8; + + // Scale by alpha if needed. + if(s.fAlphaScale < 256) { + sum *= s.fAlphaScale; + sum >>= 8; + } + + // Pack back to 8-bit channels, undoing to_16x4(). + return skvx::bit_pun>(skvx::cast(sum)); + }; + + while (count >= 8) { + bilerp(skvx::Vec<8,uint32_t>::Load(xy)).store(colors); + xy += 8; + colors += 8; + count -= 8; + } + if (count > 0) { + __m256i active = skvx::bit_pun<__m256i>( count > skvx::Vec<8,int>{0,1,2,3, 4,5,6,7} ), + coords = _mm256_maskload_epi32((const int*)xy, active), + pixels; + + bilerp(skvx::bit_pun>(coords)).store(&pixels); + _mm256_maskstore_epi32((int*)colors, active, pixels); + + sk_msan_mark_initialized(colors, colors+count, + "MSAN still doesn't understand AVX2 mask loads and stores."); + } + } + +#elif 1 && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 + + /*not static*/ inline + void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, + const uint32_t* xy, int count, uint32_t* colors) { + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(s.fBilerp); + SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); + SkASSERT(s.fAlphaScale <= 256); + + // interpolate_in_x() is the crux of the SSSE3 implementation, + // interpolating in X for up to two output pixels (A and B) using _mm_maddubs_epi16(). + auto interpolate_in_x = [](uint32_t A0, uint32_t A1, + uint32_t B0, uint32_t B1, + __m128i interlaced_x_weights) { + // _mm_maddubs_epi16() is a little idiosyncratic, but great as the core of a lerp. + // + // It takes two arguments interlaced byte-wise: + // - first arg: [ l,r, ... 7 more pairs of unsigned 8-bit values ...] + // - second arg: [ w,W, ... 7 more pairs of signed 8-bit values ...] + // and returns 8 signed 16-bit values: [ l*w + r*W, ... 7 more ... ]. + // + // That's why we go to all this trouble to make interlaced_x_weights, + // and here we're about to interlace A0 with A1 and B0 with B1 to match. + // + // Our interlaced_x_weights are all in [0,16], and so we need not worry about + // the signedness of that input nor about the signedness of the output. + + __m128i interlaced_A = _mm_unpacklo_epi8(_mm_cvtsi32_si128(A0), _mm_cvtsi32_si128(A1)), + interlaced_B = _mm_unpacklo_epi8(_mm_cvtsi32_si128(B0), _mm_cvtsi32_si128(B1)); + + return _mm_maddubs_epi16(_mm_unpacklo_epi64(interlaced_A, interlaced_B), + interlaced_x_weights); + }; + + // Interpolate {A0..A3} --> output pixel A, and {B0..B3} --> output pixel B. + // Returns two pixels, with each color channel in a 16-bit lane of the __m128i. + auto interpolate_in_x_and_y = [&](uint32_t A0, uint32_t A1, + uint32_t A2, uint32_t A3, + uint32_t B0, uint32_t B1, + uint32_t B2, uint32_t B3, + __m128i interlaced_x_weights, + int wy) { + // Interpolate each row in X, leaving 16-bit lanes scaled by interlaced_x_weights. + __m128i top = interpolate_in_x(A0,A1, B0,B1, interlaced_x_weights), + bot = interpolate_in_x(A2,A3, B2,B3, interlaced_x_weights); + + // Interpolate in Y. As in the SSE2 code, we calculate top*(16-wy) + bot*wy + // as 16*top + (bot-top)*wy to save a multiply. + __m128i px = _mm_add_epi16(_mm_slli_epi16(top, 4), + _mm_mullo_epi16(_mm_sub_epi16(bot, top), + _mm_set1_epi16(wy))); + + // Scale down by total max weight 16x16 = 256. + px = _mm_srli_epi16(px, 8); + + // Scale by alpha if needed. + if (s.fAlphaScale < 256) { + px = _mm_srli_epi16(_mm_mullo_epi16(px, _mm_set1_epi16(s.fAlphaScale)), 8); + } + return px; + }; + + // We're in _DX mode here, so we're only varying in X. + // That means the first entry of xy is our constant pair of Y coordinates and weight in Y. + // All the other entries in xy will be pairs of X coordinates and the X weight. + int y0, y1, wy; + decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); + + auto row0 = (const uint32_t*)((const uint8_t*)s.fPixmap.addr() + y0 * s.fPixmap.rowBytes()), + row1 = (const uint32_t*)((const uint8_t*)s.fPixmap.addr() + y1 * s.fPixmap.rowBytes()); + + while (count >= 4) { + // We can really get going, loading 4 X-pairs at a time to produce 4 output pixels. + int x0[4], + x1[4]; + __m128i wx; + + // decode_packed_coordinates_and_weight(), 4x. + __m128i packed = _mm_loadu_si128((const __m128i*)xy); + _mm_storeu_si128((__m128i*)x0, _mm_srli_epi32(packed, 18)); + _mm_storeu_si128((__m128i*)x1, _mm_and_si128 (packed, _mm_set1_epi32(0x3fff))); + wx = _mm_and_si128(_mm_srli_epi32(packed, 14), _mm_set1_epi32(0xf)); // [0,15] + + // Splat each x weight 4x (for each color channel) as wr for pixels on the right at x1, + // and sixteen minus that as wl for pixels on the left at x0. + __m128i wr = _mm_shuffle_epi8(wx, _mm_setr_epi8(0,0,0,0,4,4,4,4,8,8,8,8,12,12,12,12)), + wl = _mm_sub_epi8(_mm_set1_epi8(16), wr); + + // We need to interlace wl and wr for _mm_maddubs_epi16(). + __m128i interlaced_x_weights_AB = _mm_unpacklo_epi8(wl,wr), + interlaced_x_weights_CD = _mm_unpackhi_epi8(wl,wr); + + enum { A,B,C,D }; + + // interpolate_in_x_and_y() can produce two output pixels (A and B) at a time + // from eight input pixels {A0..A3} and {B0..B3}, arranged in a 2x2 grid for each. + __m128i AB = interpolate_in_x_and_y(row0[x0[A]], row0[x1[A]], + row1[x0[A]], row1[x1[A]], + row0[x0[B]], row0[x1[B]], + row1[x0[B]], row1[x1[B]], + interlaced_x_weights_AB, wy); + + // Once more with the other half of the x-weights for two more pixels C,D. + __m128i CD = interpolate_in_x_and_y(row0[x0[C]], row0[x1[C]], + row1[x0[C]], row1[x1[C]], + row0[x0[D]], row0[x1[D]], + row1[x0[D]], row1[x1[D]], + interlaced_x_weights_CD, wy); + + // Scale by alpha, pack back together to 8-bit lanes, and write out four pixels! + _mm_storeu_si128((__m128i*)colors, _mm_packus_epi16(AB, CD)); + xy += 4; + colors += 4; + count -= 4; + } + + while (count --> 0) { + // This is exactly the same flow as the count >= 4 loop above, but writing one pixel. + int x0, x1, wx; + decode_packed_coordinates_and_weight(*xy++, &x0, &x1, &wx); + + // As above, splat out wx four times as wr, and sixteen minus that as wl. + __m128i wr = _mm_set1_epi8(wx), // This splats it out 16 times, but that's fine. + wl = _mm_sub_epi8(_mm_set1_epi8(16), wr); + + __m128i interlaced_x_weights = _mm_unpacklo_epi8(wl, wr); + + __m128i A = interpolate_in_x_and_y(row0[x0], row0[x1], + row1[x0], row1[x1], + 0, 0, + 0, 0, + interlaced_x_weights, wy); + + *colors++ = _mm_cvtsi128_si32(_mm_packus_epi16(A, _mm_setzero_si128())); + } + } + + +#elif 1 && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + + /*not static*/ inline + void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, + const uint32_t* xy, int count, uint32_t* colors) { + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(s.fBilerp); + SkASSERT(kN32_SkColorType == s.fPixmap.colorType()); + SkASSERT(s.fAlphaScale <= 256); + + int y0, y1, wy; + decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); + + auto row0 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y0 * s.fPixmap.rowBytes() ), + row1 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y1 * s.fPixmap.rowBytes() ); + + // We'll put one pixel in the low 4 16-bit lanes to line up with wy, + // and another in the upper 4 16-bit lanes to line up with 16 - wy. + const __m128i allY = _mm_unpacklo_epi64(_mm_set1_epi16( wy), // Bottom pixel goes here. + _mm_set1_epi16(16-wy)); // Top pixel goes here. + + while (count --> 0) { + int x0, x1, wx; + decode_packed_coordinates_and_weight(*xy++, &x0, &x1, &wx); + + // Load the 4 pixels we're interpolating, in this grid: + // | tl tr | + // | bl br | + const __m128i tl = _mm_cvtsi32_si128(row0[x0]), tr = _mm_cvtsi32_si128(row0[x1]), + bl = _mm_cvtsi32_si128(row1[x0]), br = _mm_cvtsi32_si128(row1[x1]); + + // We want to calculate a sum of 4 pixels weighted in two directions: + // + // sum = tl * (16-wy) * (16-wx) + // + bl * ( wy) * (16-wx) + // + tr * (16-wy) * ( wx) + // + br * ( wy) * ( wx) + // + // (Notice top --> 16-wy, bottom --> wy, left --> 16-wx, right --> wx.) + // + // We've already prepared allY as a vector containing [wy, 16-wy] as a way + // to apply those y-direction weights. So we'll start on the x-direction + // first, grouping into left and right halves, lined up with allY: + // + // L = [bl, tl] + // R = [br, tr] + // + // sum = horizontalSum( allY * (L*(16-wx) + R*wx) ) + // + // Rewriting that one more step, we can replace a multiply with a shift: + // + // sum = horizontalSum( allY * (16*L + (R-L)*wx) ) + // + // That's how we'll actually do this math. + + __m128i L = _mm_unpacklo_epi8(_mm_unpacklo_epi32(bl, tl), _mm_setzero_si128()), + R = _mm_unpacklo_epi8(_mm_unpacklo_epi32(br, tr), _mm_setzero_si128()); + + __m128i inner = _mm_add_epi16(_mm_slli_epi16(L, 4), + _mm_mullo_epi16(_mm_sub_epi16(R,L), _mm_set1_epi16(wx))); + + __m128i sum_in_x = _mm_mullo_epi16(inner, allY); + + // sum = horizontalSum( ... ) + __m128i sum = _mm_add_epi16(sum_in_x, _mm_srli_si128(sum_in_x, 8)); + + // Get back to [0,255] by dividing by maximum weight 16x16 = 256. + sum = _mm_srli_epi16(sum, 8); + + if (s.fAlphaScale < 256) { + // Scale by alpha, which is in [0,256]. + sum = _mm_mullo_epi16(sum, _mm_set1_epi16(s.fAlphaScale)); + sum = _mm_srli_epi16(sum, 8); + } + + // Pack back into 8-bit values and store. + *colors++ = _mm_cvtsi128_si32(_mm_packus_epi16(sum, _mm_setzero_si128())); + } + } + +#else + + // The NEON code only actually differs from the portable code in the + // filtering step after we've loaded all four pixels we want to bilerp. + + #if defined(SK_ARM_HAS_NEON) + static void filter_and_scale_by_alpha(unsigned x, unsigned y, + SkPMColor a00, SkPMColor a01, + SkPMColor a10, SkPMColor a11, + SkPMColor *dst, + uint16_t scale) { + uint8x8_t vy, vconst16_8, v16_y, vres; + uint16x4_t vx, vconst16_16, v16_x, tmp, vscale; + uint32x2_t va0, va1; + uint16x8_t tmp1, tmp2; + + vy = vdup_n_u8(y); // duplicate y into vy + vconst16_8 = vmov_n_u8(16); // set up constant in vconst16_8 + v16_y = vsub_u8(vconst16_8, vy); // v16_y = 16-y + + va0 = vdup_n_u32(a00); // duplicate a00 + va1 = vdup_n_u32(a10); // duplicate a10 + va0 = vset_lane_u32(a01, va0, 1); // set top to a01 + va1 = vset_lane_u32(a11, va1, 1); // set top to a11 + + tmp1 = vmull_u8(vreinterpret_u8_u32(va0), v16_y); // tmp1 = [a01|a00] * (16-y) + tmp2 = vmull_u8(vreinterpret_u8_u32(va1), vy); // tmp2 = [a11|a10] * y + + vx = vdup_n_u16(x); // duplicate x into vx + vconst16_16 = vmov_n_u16(16); // set up constant in vconst16_16 + v16_x = vsub_u16(vconst16_16, vx); // v16_x = 16-x + + tmp = vmul_u16(vget_high_u16(tmp1), vx); // tmp = a01 * x + tmp = vmla_u16(tmp, vget_high_u16(tmp2), vx); // tmp += a11 * x + tmp = vmla_u16(tmp, vget_low_u16(tmp1), v16_x); // tmp += a00 * (16-x) + tmp = vmla_u16(tmp, vget_low_u16(tmp2), v16_x); // tmp += a10 * (16-x) + + if (scale < 256) { + vscale = vdup_n_u16(scale); // duplicate scale + tmp = vshr_n_u16(tmp, 8); // shift down result by 8 + tmp = vmul_u16(tmp, vscale); // multiply result by scale + } + + vres = vshrn_n_u16(vcombine_u16(tmp, vcreate_u16((uint64_t)0)), 8); // shift down result by 8 + vst1_lane_u32(dst, vreinterpret_u32_u8(vres), 0); // store result + } + #else + static void filter_and_scale_by_alpha(unsigned x, unsigned y, + SkPMColor a00, SkPMColor a01, + SkPMColor a10, SkPMColor a11, + SkPMColor* dstColor, + unsigned alphaScale) { + SkASSERT((unsigned)x <= 0xF); + SkASSERT((unsigned)y <= 0xF); + SkASSERT(alphaScale <= 256); + + int xy = x * y; + const uint32_t mask = 0xFF00FF; + + int scale = 256 - 16*y - 16*x + xy; + uint32_t lo = (a00 & mask) * scale; + uint32_t hi = ((a00 >> 8) & mask) * scale; + + scale = 16*x - xy; + lo += (a01 & mask) * scale; + hi += ((a01 >> 8) & mask) * scale; + + scale = 16*y - xy; + lo += (a10 & mask) * scale; + hi += ((a10 >> 8) & mask) * scale; + + lo += (a11 & mask) * xy; + hi += ((a11 >> 8) & mask) * xy; + + if (alphaScale < 256) { + lo = ((lo >> 8) & mask) * alphaScale; + hi = ((hi >> 8) & mask) * alphaScale; + } + + *dstColor = ((lo >> 8) & mask) | (hi & ~mask); + } + #endif + + + /*not static*/ inline + void S32_alpha_D32_filter_DX(const SkBitmapProcState& s, + const uint32_t* xy, int count, SkPMColor* colors) { + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(s.fBilerp); + SkASSERT(4 == s.fPixmap.info().bytesPerPixel()); + SkASSERT(s.fAlphaScale <= 256); + + int y0, y1, wy; + decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); + + auto row0 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y0 * s.fPixmap.rowBytes() ), + row1 = (const uint32_t*)( (const char*)s.fPixmap.addr() + y1 * s.fPixmap.rowBytes() ); + + while (count --> 0) { + int x0, x1, wx; + decode_packed_coordinates_and_weight(*xy++, &x0, &x1, &wx); + + filter_and_scale_by_alpha(wx, wy, + row0[x0], row0[x1], + row1[x0], row1[x1], + colors++, + s.fAlphaScale); + } + } + +#endif + +#if defined(SK_ARM_HAS_NEON) + /*not static*/ inline + void S32_alpha_D32_filter_DXDY(const SkBitmapProcState& s, + const uint32_t* xy, int count, SkPMColor* colors) { + SkASSERT(count > 0 && colors != nullptr); + SkASSERT(s.fBilerp); + SkASSERT(4 == s.fPixmap.info().bytesPerPixel()); + SkASSERT(s.fAlphaScale <= 256); + + auto src = (const char*)s.fPixmap.addr(); + size_t rb = s.fPixmap.rowBytes(); + + while (count --> 0) { + int y0, y1, wy, + x0, x1, wx; + decode_packed_coordinates_and_weight(*xy++, &y0, &y1, &wy); + decode_packed_coordinates_and_weight(*xy++, &x0, &x1, &wx); + + auto row0 = (const uint32_t*)(src + y0*rb), + row1 = (const uint32_t*)(src + y1*rb); + + filter_and_scale_by_alpha(wx, wy, + row0[x0], row0[x1], + row1[x0], row1[x1], + colors++, + s.fAlphaScale); + } + } +#else + // It's not yet clear whether it's worthwhile specializing for SSE2/SSSE3/AVX2. + constexpr static void (*S32_alpha_D32_filter_DXDY)(const SkBitmapProcState&, + const uint32_t*, int, SkPMColor*) = nullptr; +#endif + +} // namespace SK_OPTS_NS + +namespace sktests { + template + void decode_packed_coordinates_and_weight(U32 packed, Out* v0, Out* v1, Out* w) { + SK_OPTS_NS::decode_packed_coordinates_and_weight(packed, v0, v1, w); + } +} + +#endif diff --git a/gfx/skia/skia/src/opts/SkBlitMask_opts.h b/gfx/skia/skia/src/opts/SkBlitMask_opts.h new file mode 100644 index 0000000000..8e673a9728 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkBlitMask_opts.h @@ -0,0 +1,238 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlitMask_opts_DEFINED +#define SkBlitMask_opts_DEFINED + +#include "include/private/base/SkFeatures.h" +#include "src/core/Sk4px.h" + +#if defined(SK_ARM_HAS_NEON) + #include +#endif + +namespace SK_OPTS_NS { + +#if defined(SK_ARM_HAS_NEON) + // The Sk4px versions below will work fine with NEON, but we have had many indications + // that it doesn't perform as well as this NEON-specific code. TODO(mtklein): why? + + #define NEON_A (SK_A32_SHIFT / 8) + #define NEON_R (SK_R32_SHIFT / 8) + #define NEON_G (SK_G32_SHIFT / 8) + #define NEON_B (SK_B32_SHIFT / 8) + + static inline uint16x8_t SkAlpha255To256_neon8(uint8x8_t alpha) { + return vaddw_u8(vdupq_n_u16(1), alpha); + } + + static inline uint8x8_t SkAlphaMul_neon8(uint8x8_t color, uint16x8_t scale) { + return vshrn_n_u16(vmovl_u8(color) * scale, 8); + } + + static inline uint8x8x4_t SkAlphaMulQ_neon8(uint8x8x4_t color, uint16x8_t scale) { + uint8x8x4_t ret; + + ret.val[0] = SkAlphaMul_neon8(color.val[0], scale); + ret.val[1] = SkAlphaMul_neon8(color.val[1], scale); + ret.val[2] = SkAlphaMul_neon8(color.val[2], scale); + ret.val[3] = SkAlphaMul_neon8(color.val[3], scale); + + return ret; + } + + + template + static void D32_A8_Opaque_Color_neon(void* SK_RESTRICT dst, size_t dstRB, + const void* SK_RESTRICT maskPtr, size_t maskRB, + SkColor color, int width, int height) { + SkPMColor pmc = SkPreMultiplyColor(color); + SkPMColor* SK_RESTRICT device = (SkPMColor*)dst; + const uint8_t* SK_RESTRICT mask = (const uint8_t*)maskPtr; + uint8x8x4_t vpmc; + + // Nine patch may set maskRB to 0 to blit the same row repeatedly. + ptrdiff_t mask_adjust = (ptrdiff_t)maskRB - width; + dstRB -= (width << 2); + + if (width >= 8) { + vpmc.val[NEON_A] = vdup_n_u8(SkGetPackedA32(pmc)); + vpmc.val[NEON_R] = vdup_n_u8(SkGetPackedR32(pmc)); + vpmc.val[NEON_G] = vdup_n_u8(SkGetPackedG32(pmc)); + vpmc.val[NEON_B] = vdup_n_u8(SkGetPackedB32(pmc)); + } + do { + int w = width; + while (w >= 8) { + uint8x8_t vmask = vld1_u8(mask); + uint16x8_t vscale, vmask256 = SkAlpha255To256_neon8(vmask); + if (isColor) { + vscale = vsubw_u8(vdupq_n_u16(256), + SkAlphaMul_neon8(vpmc.val[NEON_A], vmask256)); + } else { + vscale = vsubw_u8(vdupq_n_u16(256), vmask); + } + uint8x8x4_t vdev = vld4_u8((uint8_t*)device); + + vdev.val[NEON_A] = SkAlphaMul_neon8(vpmc.val[NEON_A], vmask256) + + SkAlphaMul_neon8(vdev.val[NEON_A], vscale); + vdev.val[NEON_R] = SkAlphaMul_neon8(vpmc.val[NEON_R], vmask256) + + SkAlphaMul_neon8(vdev.val[NEON_R], vscale); + vdev.val[NEON_G] = SkAlphaMul_neon8(vpmc.val[NEON_G], vmask256) + + SkAlphaMul_neon8(vdev.val[NEON_G], vscale); + vdev.val[NEON_B] = SkAlphaMul_neon8(vpmc.val[NEON_B], vmask256) + + SkAlphaMul_neon8(vdev.val[NEON_B], vscale); + + vst4_u8((uint8_t*)device, vdev); + + mask += 8; + device += 8; + w -= 8; + } + + while (w--) { + unsigned aa = *mask++; + if (isColor) { + *device = SkBlendARGB32(pmc, *device, aa); + } else { + *device = SkAlphaMulQ(pmc, SkAlpha255To256(aa)) + + SkAlphaMulQ(*device, SkAlpha255To256(255 - aa)); + } + device += 1; + } + + device = (uint32_t*)((char*)device + dstRB); + mask += mask_adjust; + + } while (--height != 0); + } + + static void blit_mask_d32_a8_general(SkPMColor* dst, size_t dstRB, + const SkAlpha* mask, size_t maskRB, + SkColor color, int w, int h) { + D32_A8_Opaque_Color_neon(dst, dstRB, mask, maskRB, color, w, h); + } + + // As above, but made slightly simpler by requiring that color is opaque. + static void blit_mask_d32_a8_opaque(SkPMColor* dst, size_t dstRB, + const SkAlpha* mask, size_t maskRB, + SkColor color, int w, int h) { + D32_A8_Opaque_Color_neon(dst, dstRB, mask, maskRB, color, w, h); + } + + // Same as _opaque, but assumes color == SK_ColorBLACK, a very common and even simpler case. + static void blit_mask_d32_a8_black(SkPMColor* dst, size_t dstRB, + const SkAlpha* maskPtr, size_t maskRB, + int width, int height) { + SkPMColor* SK_RESTRICT device = (SkPMColor*)dst; + const uint8_t* SK_RESTRICT mask = (const uint8_t*)maskPtr; + + // Nine patch may set maskRB to 0 to blit the same row repeatedly. + ptrdiff_t mask_adjust = (ptrdiff_t)maskRB - width; + dstRB -= (width << 2); + do { + int w = width; + while (w >= 8) { + uint8x8_t vmask = vld1_u8(mask); + uint16x8_t vscale = vsubw_u8(vdupq_n_u16(256), vmask); + uint8x8x4_t vdevice = vld4_u8((uint8_t*)device); + + vdevice = SkAlphaMulQ_neon8(vdevice, vscale); + vdevice.val[NEON_A] += vmask; + + vst4_u8((uint8_t*)device, vdevice); + + mask += 8; + device += 8; + w -= 8; + } + while (w-- > 0) { + unsigned aa = *mask++; + *device = (aa << SK_A32_SHIFT) + + SkAlphaMulQ(*device, SkAlpha255To256(255 - aa)); + device += 1; + } + device = (uint32_t*)((char*)device + dstRB); + mask += mask_adjust; + } while (--height != 0); + } + +#else + static void blit_mask_d32_a8_general(SkPMColor* dst, size_t dstRB, + const SkAlpha* mask, size_t maskRB, + SkColor color, int w, int h) { + auto s = Sk4px::DupPMColor(SkPreMultiplyColor(color)); + auto fn = [&](const Sk4px& d, const Sk4px& aa) { + // = (s + d(1-sa))aa + d(1-aa) + // = s*aa + d(1-sa*aa) + auto left = s.approxMulDiv255(aa), + right = d.approxMulDiv255(left.alphas().inv()); + return left + right; // This does not overflow (exhaustively checked). + }; + while (h --> 0) { + Sk4px::MapDstAlpha(w, dst, mask, fn); + dst += dstRB / sizeof(*dst); + mask += maskRB / sizeof(*mask); + } + } + + // As above, but made slightly simpler by requiring that color is opaque. + static void blit_mask_d32_a8_opaque(SkPMColor* dst, size_t dstRB, + const SkAlpha* mask, size_t maskRB, + SkColor color, int w, int h) { + SkASSERT(SkColorGetA(color) == 0xFF); + auto s = Sk4px::DupPMColor(SkPreMultiplyColor(color)); + auto fn = [&](const Sk4px& d, const Sk4px& aa) { + // = (s + d(1-sa))aa + d(1-aa) + // = s*aa + d(1-sa*aa) + // ~~~> + // = s*aa + d(1-aa) + return s.approxMulDiv255(aa) + d.approxMulDiv255(aa.inv()); + }; + while (h --> 0) { + Sk4px::MapDstAlpha(w, dst, mask, fn); + dst += dstRB / sizeof(*dst); + mask += maskRB / sizeof(*mask); + } + } + + // Same as _opaque, but assumes color == SK_ColorBLACK, a very common and even simpler case. + static void blit_mask_d32_a8_black(SkPMColor* dst, size_t dstRB, + const SkAlpha* mask, size_t maskRB, + int w, int h) { + auto fn = [](const Sk4px& d, const Sk4px& aa) { + // = (s + d(1-sa))aa + d(1-aa) + // = s*aa + d(1-sa*aa) + // ~~~> + // a = 1*aa + d(1-1*aa) = aa + d(1-aa) + // c = 0*aa + d(1-1*aa) = d(1-aa) + return (aa & Sk4px(skvx::byte16{0,0,0,255, 0,0,0,255, 0,0,0,255, 0,0,0,255})) + + d.approxMulDiv255(aa.inv()); + }; + while (h --> 0) { + Sk4px::MapDstAlpha(w, dst, mask, fn); + dst += dstRB / sizeof(*dst); + mask += maskRB / sizeof(*mask); + } + } +#endif + +/*not static*/ inline void blit_mask_d32_a8(SkPMColor* dst, size_t dstRB, + const SkAlpha* mask, size_t maskRB, + SkColor color, int w, int h) { + if (color == SK_ColorBLACK) { + blit_mask_d32_a8_black(dst, dstRB, mask, maskRB, w, h); + } else if (SkColorGetA(color) == 0xFF) { + blit_mask_d32_a8_opaque(dst, dstRB, mask, maskRB, color, w, h); + } else { + blit_mask_d32_a8_general(dst, dstRB, mask, maskRB, color, w, h); + } +} + +} // namespace SK_OPTS_NS + +#endif//SkBlitMask_opts_DEFINED diff --git a/gfx/skia/skia/src/opts/SkBlitRow_opts.h b/gfx/skia/skia/src/opts/SkBlitRow_opts.h new file mode 100644 index 0000000000..36c5c396be --- /dev/null +++ b/gfx/skia/skia/src/opts/SkBlitRow_opts.h @@ -0,0 +1,256 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkBlitRow_opts_DEFINED +#define SkBlitRow_opts_DEFINED + +#include "include/private/SkColorData.h" +#include "src/base/SkMSAN.h" +#include "src/base/SkVx.h" + +// Helpers for blit_row_s32a_opaque(), +// then blit_row_s32a_opaque() itself, +// then unrelated blit_row_color32() at the bottom. +// +// To keep Skia resistant to timing attacks, it's important not to branch on pixel data. +// In particular, don't be tempted to [v]ptest, pmovmskb, etc. to branch on the source alpha. + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SKX + #include + + static inline __m512i SkPMSrcOver_SKX(const __m512i& src, const __m512i& dst) { + // Detailed explanations in SkPMSrcOver_AVX2 + // b = s + (d*(256-srcA)) >> 8 + + // Shuffle each pixel's srcA to the low byte of each 16-bit half of the pixel. + const uint8_t _ = -1; // fills a literal 0 byte. + const uint8_t mask[64] = { 3, _,3, _, 7, _,7, _, 11,_,11,_, 15,_,15,_, + 19,_,19,_, 23,_,23,_, 27,_,27,_, 31,_,31,_, + 35,_,35,_, 39,_,39,_, 43,_,43,_, 47,_,47,_, + 51,_,51,_, 55,_,55,_, 59,_,59,_, 63,_,63,_ }; + __m512i srcA_x2 = _mm512_shuffle_epi8(src, _mm512_loadu_si512(mask)); + __m512i scale_x2 = _mm512_sub_epi16(_mm512_set1_epi16(256), + srcA_x2); + + // Scale red and blue, leaving results in the low byte of each 16-bit lane. + __m512i rb = _mm512_and_si512(_mm512_set1_epi32(0x00ff00ff), dst); + rb = _mm512_mullo_epi16(rb, scale_x2); + rb = _mm512_srli_epi16(rb, 8); + + // Scale green and alpha, leaving results in the high byte, masking off the low bits. + __m512i ga = _mm512_srli_epi16(dst, 8); + ga = _mm512_mullo_epi16(ga, scale_x2); + ga = _mm512_andnot_si512(_mm512_set1_epi32(0x00ff00ff), ga); + + return _mm512_adds_epu8(src, _mm512_or_si512(rb, ga)); + } +#endif + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + #include + + static inline __m256i SkPMSrcOver_AVX2(const __m256i& src, const __m256i& dst) { + // Abstractly srcover is + // b = s + d*(1-srcA) + // + // In terms of unorm8 bytes, that works out to + // b = s + (d*(255-srcA) + 127) / 255 + // + // But we approximate that to within a bit with + // b = s + (d*(255-srcA) + d) / 256 + // a.k.a + // b = s + (d*(256-srcA)) >> 8 + + // The bottleneck of this math is the multiply, and we want to do it as + // narrowly as possible, here getting inputs into 16-bit lanes and + // using 16-bit multiplies. We can do twice as many multiplies at once + // as using naive 32-bit multiplies, and on top of that, the 16-bit multiplies + // are themselves a couple cycles quicker. Win-win. + + // We'll get everything in 16-bit lanes for two multiplies, one + // handling dst red and blue, the other green and alpha. (They're + // conveniently 16-bits apart, you see.) We don't need the individual + // src channels beyond alpha until the very end when we do the "s + " + // add, and we don't even need to unpack them; the adds cannot overflow. + + // Shuffle each pixel's srcA to the low byte of each 16-bit half of the pixel. + const int _ = -1; // fills a literal 0 byte. + __m256i srcA_x2 = _mm256_shuffle_epi8(src, + _mm256_setr_epi8(3,_,3,_, 7,_,7,_, 11,_,11,_, 15,_,15,_, + 3,_,3,_, 7,_,7,_, 11,_,11,_, 15,_,15,_)); + __m256i scale_x2 = _mm256_sub_epi16(_mm256_set1_epi16(256), + srcA_x2); + + // Scale red and blue, leaving results in the low byte of each 16-bit lane. + __m256i rb = _mm256_and_si256(_mm256_set1_epi32(0x00ff00ff), dst); + rb = _mm256_mullo_epi16(rb, scale_x2); + rb = _mm256_srli_epi16 (rb, 8); + + // Scale green and alpha, leaving results in the high byte, masking off the low bits. + __m256i ga = _mm256_srli_epi16(dst, 8); + ga = _mm256_mullo_epi16(ga, scale_x2); + ga = _mm256_andnot_si256(_mm256_set1_epi32(0x00ff00ff), ga); + + return _mm256_adds_epu8(src, _mm256_or_si256(rb, ga)); + } +#endif + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #include + + static inline __m128i SkPMSrcOver_SSE2(const __m128i& src, const __m128i& dst) { + __m128i scale = _mm_sub_epi32(_mm_set1_epi32(256), + _mm_srli_epi32(src, 24)); + __m128i scale_x2 = _mm_or_si128(_mm_slli_epi32(scale, 16), scale); + + __m128i rb = _mm_and_si128(_mm_set1_epi32(0x00ff00ff), dst); + rb = _mm_mullo_epi16(rb, scale_x2); + rb = _mm_srli_epi16(rb, 8); + + __m128i ga = _mm_srli_epi16(dst, 8); + ga = _mm_mullo_epi16(ga, scale_x2); + ga = _mm_andnot_si128(_mm_set1_epi32(0x00ff00ff), ga); + + return _mm_adds_epu8(src, _mm_or_si128(rb, ga)); + } +#endif + +#if defined(SK_ARM_HAS_NEON) + #include + + // SkMulDiv255Round() applied to each lane. + static inline uint8x8_t SkMulDiv255Round_neon8(uint8x8_t x, uint8x8_t y) { + uint16x8_t prod = vmull_u8(x, y); + return vraddhn_u16(prod, vrshrq_n_u16(prod, 8)); + } + + static inline uint8x8x4_t SkPMSrcOver_neon8(uint8x8x4_t dst, uint8x8x4_t src) { + uint8x8_t nalphas = vmvn_u8(src.val[3]); // 256 - alpha + return { + vqadd_u8(src.val[0], SkMulDiv255Round_neon8(nalphas, dst.val[0])), + vqadd_u8(src.val[1], SkMulDiv255Round_neon8(nalphas, dst.val[1])), + vqadd_u8(src.val[2], SkMulDiv255Round_neon8(nalphas, dst.val[2])), + vqadd_u8(src.val[3], SkMulDiv255Round_neon8(nalphas, dst.val[3])), + }; + } + + // Variant assuming dst and src contain the color components of two consecutive pixels. + static inline uint8x8_t SkPMSrcOver_neon2(uint8x8_t dst, uint8x8_t src) { + const uint8x8_t alpha_indices = vcreate_u8(0x0707070703030303); + uint8x8_t nalphas = vmvn_u8(vtbl1_u8(src, alpha_indices)); + return vqadd_u8(src, SkMulDiv255Round_neon8(nalphas, dst)); + } + +#endif + +namespace SK_OPTS_NS { + +/*not static*/ +inline void blit_row_s32a_opaque(SkPMColor* dst, const SkPMColor* src, int len, U8CPU alpha) { + SkASSERT(alpha == 0xFF); + sk_msan_assert_initialized(src, src+len); + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SKX + while (len >= 16) { + _mm512_storeu_si512((__m512*)dst, + SkPMSrcOver_SKX(_mm512_loadu_si512((const __m512i*)src), + _mm512_loadu_si512((const __m512i*)dst))); + src += 16; + dst += 16; + len -= 16; + } +#endif + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + while (len >= 8) { + _mm256_storeu_si256((__m256i*)dst, + SkPMSrcOver_AVX2(_mm256_loadu_si256((const __m256i*)src), + _mm256_loadu_si256((const __m256i*)dst))); + src += 8; + dst += 8; + len -= 8; + } +#endif + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + while (len >= 4) { + _mm_storeu_si128((__m128i*)dst, SkPMSrcOver_SSE2(_mm_loadu_si128((const __m128i*)src), + _mm_loadu_si128((const __m128i*)dst))); + src += 4; + dst += 4; + len -= 4; + } +#endif + +#if defined(SK_ARM_HAS_NEON) + while (len >= 8) { + vst4_u8((uint8_t*)dst, SkPMSrcOver_neon8(vld4_u8((const uint8_t*)dst), + vld4_u8((const uint8_t*)src))); + src += 8; + dst += 8; + len -= 8; + } + + while (len >= 2) { + vst1_u8((uint8_t*)dst, SkPMSrcOver_neon2(vld1_u8((const uint8_t*)dst), + vld1_u8((const uint8_t*)src))); + src += 2; + dst += 2; + len -= 2; + } + + if (len != 0) { + uint8x8_t result = SkPMSrcOver_neon2(vcreate_u8((uint64_t)*dst), + vcreate_u8((uint64_t)*src)); + vst1_lane_u32(dst, vreinterpret_u32_u8(result), 0); + } + return; +#endif + + while (len --> 0) { + *dst = SkPMSrcOver(*src, *dst); + src++; + dst++; + } +} + +// Blend constant color over count src pixels, writing into dst. +/*not static*/ +inline void blit_row_color32(SkPMColor* dst, const SkPMColor* src, int count, SkPMColor color) { + constexpr int N = 4; // 8, 16 also reasonable choices + using U32 = skvx::Vec< N, uint32_t>; + using U16 = skvx::Vec<4*N, uint16_t>; + using U8 = skvx::Vec<4*N, uint8_t>; + + auto kernel = [color](U32 src) { + unsigned invA = 255 - SkGetPackedA32(color); + invA += invA >> 7; + SkASSERT(0 < invA && invA < 256); // We handle alpha == 0 or alpha == 255 specially. + + // (src * invA + (color << 8) + 128) >> 8 + // Should all fit in 16 bits. + U8 s = skvx::bit_pun(src), + a = U8(invA); + U16 c = skvx::cast(skvx::bit_pun(U32(color))), + d = (mull(s,a) + (c << 8) + 128)>>8; + return skvx::bit_pun(skvx::cast(d)); + }; + + while (count >= N) { + kernel(U32::Load(src)).store(dst); + src += N; + dst += N; + count -= N; + } + while (count --> 0) { + *dst++ = kernel(U32{*src++})[0]; + } +} + +} // namespace SK_OPTS_NS + +#endif//SkBlitRow_opts_DEFINED diff --git a/gfx/skia/skia/src/opts/SkChecksum_opts.h b/gfx/skia/skia/src/opts/SkChecksum_opts.h new file mode 100644 index 0000000000..53c7edf373 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkChecksum_opts.h @@ -0,0 +1,145 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkChecksum_opts_DEFINED +#define SkChecksum_opts_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/SkChecksum.h" +#include "src/base/SkUtils.h" // sk_unaligned_load + +// This function is designed primarily to deliver consistent results no matter the platform, +// but then also is optimized for speed on modern machines with CRC32c instructions. +// (ARM supports both CRC32 and CRC32c, but Intel only CRC32c, so we use CRC32c.) + +#if 1 && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE42 + #include + static uint32_t crc32c_1(uint32_t seed, uint8_t v) { return _mm_crc32_u8(seed, v); } + static uint32_t crc32c_4(uint32_t seed, uint32_t v) { return _mm_crc32_u32(seed, v); } + static uint32_t crc32c_8(uint32_t seed, uint64_t v) { + #if 1 && (defined(__x86_64__) || defined(_M_X64)) + return _mm_crc32_u64(seed, v); + #else + seed = _mm_crc32_u32(seed, (uint32_t)(v )); + return _mm_crc32_u32(seed, (uint32_t)(v >> 32)); + #endif + } +#elif 1 && defined(SK_ARM_HAS_CRC32) + #include + static uint32_t crc32c_1(uint32_t seed, uint8_t v) { return __crc32cb(seed, v); } + static uint32_t crc32c_4(uint32_t seed, uint32_t v) { return __crc32cw(seed, v); } + static uint32_t crc32c_8(uint32_t seed, uint64_t v) { return __crc32cd(seed, v); } +#else + // See https://www.w3.org/TR/PNG/#D-CRCAppendix, + // but this is CRC32c, so built with 0x82f63b78, not 0xedb88320 like you'll see there. + #if 0 + static std::array table = []{ + std::array t; + for (int i = 0; i < 256; i++) { + t[i] = i; + for (int bits = 8; bits --> 0; ) { + t[i] = (t[i] & 1) ? (t[i] >> 1) ^ 0x82f63b78 + : (t[i] >> 1); + } + printf("0x%08x,%s", t[i], (i+1) % 8 ? "" : "\n"); + } + return t; + }(); + #endif + static constexpr uint32_t crc32c_table[256] = { + 0x00000000,0xf26b8303,0xe13b70f7,0x1350f3f4, 0xc79a971f,0x35f1141c,0x26a1e7e8,0xd4ca64eb, + 0x8ad958cf,0x78b2dbcc,0x6be22838,0x9989ab3b, 0x4d43cfd0,0xbf284cd3,0xac78bf27,0x5e133c24, + 0x105ec76f,0xe235446c,0xf165b798,0x030e349b, 0xd7c45070,0x25afd373,0x36ff2087,0xc494a384, + 0x9a879fa0,0x68ec1ca3,0x7bbcef57,0x89d76c54, 0x5d1d08bf,0xaf768bbc,0xbc267848,0x4e4dfb4b, + 0x20bd8ede,0xd2d60ddd,0xc186fe29,0x33ed7d2a, 0xe72719c1,0x154c9ac2,0x061c6936,0xf477ea35, + 0xaa64d611,0x580f5512,0x4b5fa6e6,0xb93425e5, 0x6dfe410e,0x9f95c20d,0x8cc531f9,0x7eaeb2fa, + 0x30e349b1,0xc288cab2,0xd1d83946,0x23b3ba45, 0xf779deae,0x05125dad,0x1642ae59,0xe4292d5a, + 0xba3a117e,0x4851927d,0x5b016189,0xa96ae28a, 0x7da08661,0x8fcb0562,0x9c9bf696,0x6ef07595, + 0x417b1dbc,0xb3109ebf,0xa0406d4b,0x522bee48, 0x86e18aa3,0x748a09a0,0x67dafa54,0x95b17957, + 0xcba24573,0x39c9c670,0x2a993584,0xd8f2b687, 0x0c38d26c,0xfe53516f,0xed03a29b,0x1f682198, + 0x5125dad3,0xa34e59d0,0xb01eaa24,0x42752927, 0x96bf4dcc,0x64d4cecf,0x77843d3b,0x85efbe38, + 0xdbfc821c,0x2997011f,0x3ac7f2eb,0xc8ac71e8, 0x1c661503,0xee0d9600,0xfd5d65f4,0x0f36e6f7, + 0x61c69362,0x93ad1061,0x80fde395,0x72966096, 0xa65c047d,0x5437877e,0x4767748a,0xb50cf789, + 0xeb1fcbad,0x197448ae,0x0a24bb5a,0xf84f3859, 0x2c855cb2,0xdeeedfb1,0xcdbe2c45,0x3fd5af46, + 0x7198540d,0x83f3d70e,0x90a324fa,0x62c8a7f9, 0xb602c312,0x44694011,0x5739b3e5,0xa55230e6, + 0xfb410cc2,0x092a8fc1,0x1a7a7c35,0xe811ff36, 0x3cdb9bdd,0xceb018de,0xdde0eb2a,0x2f8b6829, + + 0x82f63b78,0x709db87b,0x63cd4b8f,0x91a6c88c, 0x456cac67,0xb7072f64,0xa457dc90,0x563c5f93, + 0x082f63b7,0xfa44e0b4,0xe9141340,0x1b7f9043, 0xcfb5f4a8,0x3dde77ab,0x2e8e845f,0xdce5075c, + 0x92a8fc17,0x60c37f14,0x73938ce0,0x81f80fe3, 0x55326b08,0xa759e80b,0xb4091bff,0x466298fc, + 0x1871a4d8,0xea1a27db,0xf94ad42f,0x0b21572c, 0xdfeb33c7,0x2d80b0c4,0x3ed04330,0xccbbc033, + 0xa24bb5a6,0x502036a5,0x4370c551,0xb11b4652, 0x65d122b9,0x97baa1ba,0x84ea524e,0x7681d14d, + 0x2892ed69,0xdaf96e6a,0xc9a99d9e,0x3bc21e9d, 0xef087a76,0x1d63f975,0x0e330a81,0xfc588982, + 0xb21572c9,0x407ef1ca,0x532e023e,0xa145813d, 0x758fe5d6,0x87e466d5,0x94b49521,0x66df1622, + 0x38cc2a06,0xcaa7a905,0xd9f75af1,0x2b9cd9f2, 0xff56bd19,0x0d3d3e1a,0x1e6dcdee,0xec064eed, + 0xc38d26c4,0x31e6a5c7,0x22b65633,0xd0ddd530, 0x0417b1db,0xf67c32d8,0xe52cc12c,0x1747422f, + 0x49547e0b,0xbb3ffd08,0xa86f0efc,0x5a048dff, 0x8ecee914,0x7ca56a17,0x6ff599e3,0x9d9e1ae0, + 0xd3d3e1ab,0x21b862a8,0x32e8915c,0xc083125f, 0x144976b4,0xe622f5b7,0xf5720643,0x07198540, + 0x590ab964,0xab613a67,0xb831c993,0x4a5a4a90, 0x9e902e7b,0x6cfbad78,0x7fab5e8c,0x8dc0dd8f, + 0xe330a81a,0x115b2b19,0x020bd8ed,0xf0605bee, 0x24aa3f05,0xd6c1bc06,0xc5914ff2,0x37faccf1, + 0x69e9f0d5,0x9b8273d6,0x88d28022,0x7ab90321, 0xae7367ca,0x5c18e4c9,0x4f48173d,0xbd23943e, + 0xf36e6f75,0x0105ec76,0x12551f82,0xe03e9c81, 0x34f4f86a,0xc69f7b69,0xd5cf889d,0x27a40b9e, + 0x79b737ba,0x8bdcb4b9,0x988c474d,0x6ae7c44e, 0xbe2da0a5,0x4c4623a6,0x5f16d052,0xad7d5351, + }; + static uint32_t crc32c_1(uint32_t seed, uint8_t v) { + return crc32c_table[(seed ^ v) & 0xff] + ^ (seed >> 8); + } + static uint32_t crc32c_4(uint32_t seed, uint32_t v) { + // Nothing special... just crc32c_1() each byte. + for (int i = 0; i < 4; i++) { + seed = crc32c_1(seed, (uint8_t)v); + v >>= 8; + } + return seed; + } + static uint32_t crc32c_8(uint32_t seed, uint64_t v) { + // Nothing special... just crc32c_1() each byte. + for (int i = 0; i < 8; i++) { + seed = crc32c_1(seed, (uint8_t)v); + v >>= 8; + } + return seed; + } +#endif + +namespace SK_OPTS_NS { + + inline uint32_t hash_fn(const void* data, size_t len, uint32_t seed) { + auto ptr = (const uint8_t*)data; + + // Handle the bulk with a few data-parallel independent hashes, + // taking advantage of pipelining and superscalar execution. + if (len >= 24) { + uint32_t a = seed, + b = seed, + c = seed; + while (len >= 24) { + a = crc32c_8(a, sk_unaligned_load(ptr + 0)); + b = crc32c_8(b, sk_unaligned_load(ptr + 8)); + c = crc32c_8(c, sk_unaligned_load(ptr + 16)); + ptr += 24; + len -= 24; + } + seed = crc32c_4(a, crc32c_4(b,c)); + } + while (len >= 8) { + seed = crc32c_8(seed, sk_unaligned_load(ptr)); + ptr += 8; + len -= 8; + } + while (len >= 1) { + seed = crc32c_1(seed, sk_unaligned_load(ptr)); + ptr += 1; + len -= 1; + } + return seed; + } + +} // namespace SK_OPTS_NS + +#endif//SkChecksum_opts_DEFINED diff --git a/gfx/skia/skia/src/opts/SkOpts_avx.cpp b/gfx/skia/skia/src/opts/SkOpts_avx.cpp new file mode 100644 index 0000000000..bceb3e115b --- /dev/null +++ b/gfx/skia/skia/src/opts/SkOpts_avx.cpp @@ -0,0 +1,27 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkOpts.h" + +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + +#define SK_OPTS_NS avx +#include "src/opts/SkUtils_opts.h" + +namespace SkOpts { + void Init_avx() { + memset16 = SK_OPTS_NS::memset16; + memset32 = SK_OPTS_NS::memset32; + memset64 = SK_OPTS_NS::memset64; + + rect_memset16 = SK_OPTS_NS::rect_memset16; + rect_memset32 = SK_OPTS_NS::rect_memset32; + rect_memset64 = SK_OPTS_NS::rect_memset64; + } +} // namespace SkOpts + +#endif // SK_ENABLE_OPTIMIZE_SIZE diff --git a/gfx/skia/skia/src/opts/SkOpts_crc32.cpp b/gfx/skia/skia/src/opts/SkOpts_crc32.cpp new file mode 100644 index 0000000000..5de8c39a69 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkOpts_crc32.cpp @@ -0,0 +1,21 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkOpts.h" + +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + +#define SK_OPTS_NS crc32 +#include "src/opts/SkChecksum_opts.h" + +namespace SkOpts { + void Init_crc32() { + hash_fn = crc32::hash_fn; + } +} + +#endif // SK_ENABLE_OPTIMIZE_SIZE diff --git a/gfx/skia/skia/src/opts/SkOpts_hsw.cpp b/gfx/skia/skia/src/opts/SkOpts_hsw.cpp new file mode 100644 index 0000000000..34f2ccda61 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkOpts_hsw.cpp @@ -0,0 +1,58 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkOpts.h" + +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + +#define SK_OPTS_NS hsw +#include "src/core/SkCubicSolver.h" +#include "src/opts/SkBitmapProcState_opts.h" +#include "src/opts/SkBlitRow_opts.h" +#include "src/opts/SkRasterPipeline_opts.h" +#include "src/opts/SkSwizzler_opts.h" +#include "src/opts/SkUtils_opts.h" +#include "src/opts/SkVM_opts.h" + +namespace SkOpts { + void Init_hsw() { + blit_row_color32 = hsw::blit_row_color32; + blit_row_s32a_opaque = hsw::blit_row_s32a_opaque; + + S32_alpha_D32_filter_DX = hsw::S32_alpha_D32_filter_DX; + + cubic_solver = SK_OPTS_NS::cubic_solver; + + RGBA_to_BGRA = SK_OPTS_NS::RGBA_to_BGRA; + RGBA_to_rgbA = SK_OPTS_NS::RGBA_to_rgbA; + RGBA_to_bgrA = SK_OPTS_NS::RGBA_to_bgrA; + gray_to_RGB1 = SK_OPTS_NS::gray_to_RGB1; + grayA_to_RGBA = SK_OPTS_NS::grayA_to_RGBA; + grayA_to_rgbA = SK_OPTS_NS::grayA_to_rgbA; + inverted_CMYK_to_RGB1 = SK_OPTS_NS::inverted_CMYK_to_RGB1; + inverted_CMYK_to_BGR1 = SK_OPTS_NS::inverted_CMYK_to_BGR1; + + raster_pipeline_lowp_stride = SK_OPTS_NS::raster_pipeline_lowp_stride(); + raster_pipeline_highp_stride = SK_OPTS_NS::raster_pipeline_highp_stride(); + + #define M(st) ops_highp[(int)SkRasterPipelineOp::st] = (StageFn)SK_OPTS_NS::st; + SK_RASTER_PIPELINE_OPS_ALL(M) + just_return_highp = (StageFn)SK_OPTS_NS::just_return; + start_pipeline_highp = SK_OPTS_NS::start_pipeline; + #undef M + + #define M(st) ops_lowp[(int)SkRasterPipelineOp::st] = (StageFn)SK_OPTS_NS::lowp::st; + SK_RASTER_PIPELINE_OPS_LOWP(M) + just_return_lowp = (StageFn)SK_OPTS_NS::lowp::just_return; + start_pipeline_lowp = SK_OPTS_NS::lowp::start_pipeline; + #undef M + + interpret_skvm = SK_OPTS_NS::interpret_skvm; + } +} // namespace SkOpts + +#endif // SK_ENABLE_OPTIMIZE_SIZE diff --git a/gfx/skia/skia/src/opts/SkOpts_skx.cpp b/gfx/skia/skia/src/opts/SkOpts_skx.cpp new file mode 100644 index 0000000000..7e8ff2df55 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkOpts_skx.cpp @@ -0,0 +1,21 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkOpts.h" + +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + +#define SK_OPTS_NS skx +#include "src/opts/SkVM_opts.h" + +namespace SkOpts { + void Init_skx() { + interpret_skvm = SK_OPTS_NS::interpret_skvm; + } +} // namespace SkOpts + +#endif // SK_ENABLE_OPTIMIZE_SIZE diff --git a/gfx/skia/skia/src/opts/SkOpts_sse42.cpp b/gfx/skia/skia/src/opts/SkOpts_sse42.cpp new file mode 100644 index 0000000000..aa210014d0 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkOpts_sse42.cpp @@ -0,0 +1,21 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkOpts.h" + +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + +#define SK_OPTS_NS sse42 +#include "src/opts/SkChecksum_opts.h" + +namespace SkOpts { + void Init_sse42() { + hash_fn = sse42::hash_fn; + } +} // namespace SkOpts + +#endif // SK_ENABLE_OPTIMIZE_SIZE diff --git a/gfx/skia/skia/src/opts/SkOpts_ssse3.cpp b/gfx/skia/skia/src/opts/SkOpts_ssse3.cpp new file mode 100644 index 0000000000..15196ecf43 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkOpts_ssse3.cpp @@ -0,0 +1,38 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkOpts.h" + +#if !defined(SK_ENABLE_OPTIMIZE_SIZE) + +#define SK_OPTS_NS ssse3 +#include "src/opts/SkBitmapProcState_opts.h" +#include "src/opts/SkBlitMask_opts.h" +#include "src/opts/SkSwizzler_opts.h" +#include "src/opts/SkXfermode_opts.h" + +namespace SkOpts { + void Init_ssse3() { + create_xfermode = ssse3::create_xfermode; + blit_mask_d32_a8 = ssse3::blit_mask_d32_a8; + + RGBA_to_BGRA = ssse3::RGBA_to_BGRA; + RGBA_to_rgbA = ssse3::RGBA_to_rgbA; + RGBA_to_bgrA = ssse3::RGBA_to_bgrA; + RGB_to_RGB1 = ssse3::RGB_to_RGB1; + RGB_to_BGR1 = ssse3::RGB_to_BGR1; + gray_to_RGB1 = ssse3::gray_to_RGB1; + grayA_to_RGBA = ssse3::grayA_to_RGBA; + grayA_to_rgbA = ssse3::grayA_to_rgbA; + inverted_CMYK_to_RGB1 = ssse3::inverted_CMYK_to_RGB1; + inverted_CMYK_to_BGR1 = ssse3::inverted_CMYK_to_BGR1; + + S32_alpha_D32_filter_DX = ssse3::S32_alpha_D32_filter_DX; + } +} // namespace SkOpts + +#endif // SK_ENABLE_OPTIMIZE_SIZE diff --git a/gfx/skia/skia/src/opts/SkRasterPipeline_opts.h b/gfx/skia/skia/src/opts/SkRasterPipeline_opts.h new file mode 100644 index 0000000000..fa47902e47 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkRasterPipeline_opts.h @@ -0,0 +1,5666 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkRasterPipeline_opts_DEFINED +#define SkRasterPipeline_opts_DEFINED + +#include "include/core/SkData.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMalloc.h" +#include "modules/skcms/skcms.h" +#include "src/base/SkUtils.h" // unaligned_{load,store} +#include "src/core/SkRasterPipeline.h" +#include + +// Every function in this file should be marked static and inline using SI. +#if defined(__clang__) || defined(__GNUC__) + #define SI __attribute__((always_inline)) static inline +#else + #define SI static inline +#endif + +template +SI Dst widen_cast(const Src& src) { + static_assert(sizeof(Dst) > sizeof(Src)); + static_assert(std::is_trivially_copyable::value); + static_assert(std::is_trivially_copyable::value); + Dst dst; + memcpy(&dst, &src, sizeof(Src)); + return dst; +} + +struct Ctx { + SkRasterPipelineStage* fStage; + + template + operator T*() { + return (T*)fStage->ctx; + } +}; + +using NoCtx = const void*; + +#if defined(SK_ARM_HAS_NEON) + #define JUMPER_IS_NEON +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SKX + #define JUMPER_IS_SKX +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + #define JUMPER_IS_HSW +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX + #define JUMPER_IS_AVX +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41 + #define JUMPER_IS_SSE41 +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 + #define JUMPER_IS_SSE2 +#else + #define JUMPER_IS_SCALAR +#endif + +// Older Clangs seem to crash when generating non-optimized NEON code for ARMv7. +#if defined(__clang__) && !defined(__OPTIMIZE__) && defined(SK_CPU_ARM32) + // Apple Clang 9 and vanilla Clang 5 are fine, and may even be conservative. + #if defined(__apple_build_version__) && __clang_major__ < 9 + #define JUMPER_IS_SCALAR + #elif __clang_major__ < 5 + #define JUMPER_IS_SCALAR + #endif + + #if defined(JUMPER_IS_NEON) && defined(JUMPER_IS_SCALAR) + #undef JUMPER_IS_NEON + #endif +#endif + +#if defined(JUMPER_IS_SCALAR) + #include +#elif defined(JUMPER_IS_NEON) + #include +#else + #include +#endif + +#if !defined(__clang__) && !defined(JUMPER_IS_SCALAR) +#include "src/base/SkVx.h" +#endif + +#ifdef __clang__ +#define SK_ASSUME(cond) __builtin_assume(cond) +#elif defined(__GNUC__) +#define SK_ASSUME(cond) ((cond) ? (void)0 : __builtin_unreachable()) +#elif defined(_MSC_VER) +#define SK_ASSUME(cond) __assume(cond) +#else +#define SK_ASSUME(cond) ((void)0) +#endif + +#if defined(__clang__) || defined(__GNUC__) +#define SK_EXPECT(exp, p) __builtin_expect(exp, p) +#else +#define SK_EXPECT(exp, p) (exp) +#endif + +#ifdef __clang__ +#define SK_VECTORTYPE(type, size) type __attribute__((ext_vector_type(size))) +#else +#define SK_VECTORTYPE(type, size) skvx::Vec +#endif + +#if defined(JUMPER_IS_SCALAR) +#define SK_CONVERTVECTOR(vec, type) ((type)(vec)) +#elif defined(__clang__) +#define SK_CONVERTVECTOR(vec, type) __builtin_convertvector(vec, type) +#else +#define SK_CONVERTVECTOR(vec, type) skvx::cast(vec) +#endif + +// Notes: +// * rcp_fast and rcp_precise both produce a reciprocal, but rcp_fast is an estimate with at least +// 12 bits of precision while rcp_precise should be accurate for float size. For ARM rcp_precise +// requires 2 Newton-Raphson refinement steps because its estimate has 8 bit precision, and for +// Intel this requires one additional step because its estimate has 12 bit precision. + +namespace SK_OPTS_NS { +#if defined(JUMPER_IS_SCALAR) + // This path should lead to portable scalar code. + using F = float ; + using I32 = int32_t; + using U64 = uint64_t; + using U32 = uint32_t; + using U16 = uint16_t; + using U8 = uint8_t ; + + SI F min(F a, F b) { return fminf(a,b); } + SI I32 min(I32 a, I32 b) { return a < b ? a : b; } + SI U32 min(U32 a, U32 b) { return a < b ? a : b; } + SI F max(F a, F b) { return fmaxf(a,b); } + SI I32 max(I32 a, I32 b) { return a > b ? a : b; } + SI U32 max(U32 a, U32 b) { return a > b ? a : b; } + + SI F mad(F f, F m, F a) { return f*m+a; } + SI F abs_ (F v) { return fabsf(v); } + SI I32 abs_ (I32 v) { return v < 0 ? -v : v; } + SI F floor_(F v) { return floorf(v); } + SI F ceil_(F v) { return ceilf(v); } + SI F rcp_fast(F v) { return 1.0f / v; } + SI F rsqrt (F v) { return 1.0f / sqrtf(v); } + SI F sqrt_ (F v) { return sqrtf(v); } + SI F rcp_precise (F v) { return 1.0f / v; } + + SI U32 round (F v, F scale) { return (uint32_t)(v*scale + 0.5f); } + SI U16 pack(U32 v) { return (U16)v; } + SI U8 pack(U16 v) { return (U8)v; } + + SI F if_then_else(I32 c, F t, F e) { return c ? t : e; } + SI bool any(I32 c) { return c != 0; } + SI bool all(I32 c) { return c != 0; } + + template + SI T gather(const T* p, U32 ix) { return p[ix]; } + + template + SI void scatter_masked(T src, T* dst, U32 ix, I32 mask) { + dst[ix] = mask ? src : dst[ix]; + } + + SI void load2(const uint16_t* ptr, size_t tail, U16* r, U16* g) { + *r = ptr[0]; + *g = ptr[1]; + } + SI void store2(uint16_t* ptr, size_t tail, U16 r, U16 g) { + ptr[0] = r; + ptr[1] = g; + } + SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { + *r = ptr[0]; + *g = ptr[1]; + *b = ptr[2]; + } + SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { + *r = ptr[0]; + *g = ptr[1]; + *b = ptr[2]; + *a = ptr[3]; + } + SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { + ptr[0] = r; + ptr[1] = g; + ptr[2] = b; + ptr[3] = a; + } + + SI void load2(const float* ptr, size_t tail, F* r, F* g) { + *r = ptr[0]; + *g = ptr[1]; + } + SI void store2(float* ptr, size_t tail, F r, F g) { + ptr[0] = r; + ptr[1] = g; + } + SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { + *r = ptr[0]; + *g = ptr[1]; + *b = ptr[2]; + *a = ptr[3]; + } + SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { + ptr[0] = r; + ptr[1] = g; + ptr[2] = b; + ptr[3] = a; + } + +#elif defined(JUMPER_IS_NEON) + // Since we know we're using Clang, we can use its vector extensions. + template using V = SK_VECTORTYPE(T, 4); + using F = V; + using I32 = V< int32_t>; + using U64 = V; + using U32 = V; + using U16 = V; + using U8 = V; + + // We polyfill a few routines that Clang doesn't build into ext_vector_types. + SI F min(F a, F b) { return vminq_f32(a,b); } + SI I32 min(I32 a, I32 b) { return vminq_s32(a,b); } + SI U32 min(U32 a, U32 b) { return vminq_u32(a,b); } + SI F max(F a, F b) { return vmaxq_f32(a,b); } + SI I32 max(I32 a, I32 b) { return vmaxq_s32(a,b); } + SI U32 max(U32 a, U32 b) { return vmaxq_u32(a,b); } + + SI F abs_ (F v) { return vabsq_f32(v); } + SI I32 abs_ (I32 v) { return vabsq_s32(v); } + SI F rcp_fast(F v) { auto e = vrecpeq_f32 (v); return vrecpsq_f32 (v,e ) * e; } + SI F rcp_precise (F v) { float32x4_t e = rcp_fast(v); return vrecpsq_f32(v,e) * e; } + SI F rsqrt (F v) { auto e = vrsqrteq_f32(v); return vrsqrtsq_f32(v,e*e) * e; } + + SI U16 pack(U32 v) { return SK_CONVERTVECTOR(v, U16); } + SI U8 pack(U16 v) { return SK_CONVERTVECTOR(v, U8); } + + SI F if_then_else(I32 c, F t, F e) { return vbslq_f32(vreinterpretq_u32_s32(c),t,e); } + + #if defined(SK_CPU_ARM64) + SI bool any(I32 c) { return vmaxvq_u32(vreinterpretq_u32_s32(c)) != 0; } + SI bool all(I32 c) { return vminvq_u32(vreinterpretq_u32_s32(c)) != 0; } + + SI F mad(F f, F m, F a) { return vfmaq_f32(a,f,m); } + SI F floor_(F v) { return vrndmq_f32(v); } + SI F ceil_(F v) { return vrndpq_f32(v); } + SI F sqrt_(F v) { return vsqrtq_f32(v); } + SI U32 round(F v, F scale) { return vcvtnq_u32_f32(v*scale); } + #else + SI bool any(I32 c) { return c[0] | c[1] | c[2] | c[3]; } + SI bool all(I32 c) { return c[0] & c[1] & c[2] & c[3]; } + + SI F mad(F f, F m, F a) { return vmlaq_f32(a,f,m); } + SI F floor_(F v) { + F roundtrip = vcvtq_f32_s32(vcvtq_s32_f32(v)); + return roundtrip - if_then_else(roundtrip > v, 1, 0); + } + + SI F ceil_(F v) { + F roundtrip = vcvtq_f32_s32(vcvtq_s32_f32(v)); + return roundtrip + if_then_else(roundtrip < v, 1, 0); + } + + SI F sqrt_(F v) { + auto e = vrsqrteq_f32(v); // Estimate and two refinement steps for e = rsqrt(v). + e *= vrsqrtsq_f32(v,e*e); + e *= vrsqrtsq_f32(v,e*e); + return v*F(e); // sqrt(v) == v*rsqrt(v). + } + + SI U32 round(F v, F scale) { + return vcvtq_u32_f32(mad(v,scale,0.5f)); + } + #endif + + template + SI V gather(const T* p, U32 ix) { + return {p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]]}; + } + template + SI void scatter_masked(V src, S* dst, U32 ix, I32 mask) { + V before = gather(dst, ix); + V after = if_then_else(mask, src, before); + dst[ix[0]] = after[0]; + dst[ix[1]] = after[1]; + dst[ix[2]] = after[2]; + dst[ix[3]] = after[3]; + } + SI void load2(const uint16_t* ptr, size_t tail, U16* r, U16* g) { + uint16x4x2_t rg; + if (SK_EXPECT(tail,0)) { + if ( true ) { rg = vld2_lane_u16(ptr + 0, rg, 0); } + if (tail > 1) { rg = vld2_lane_u16(ptr + 2, rg, 1); } + if (tail > 2) { rg = vld2_lane_u16(ptr + 4, rg, 2); } + } else { + rg = vld2_u16(ptr); + } + *r = rg.val[0]; + *g = rg.val[1]; + } + SI void store2(uint16_t* ptr, size_t tail, U16 r, U16 g) { + if (SK_EXPECT(tail,0)) { + if ( true ) { vst2_lane_u16(ptr + 0, (uint16x4x2_t{{r,g}}), 0); } + if (tail > 1) { vst2_lane_u16(ptr + 2, (uint16x4x2_t{{r,g}}), 1); } + if (tail > 2) { vst2_lane_u16(ptr + 4, (uint16x4x2_t{{r,g}}), 2); } + } else { + vst2_u16(ptr, (uint16x4x2_t{{r,g}})); + } + } + SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { + uint16x4x3_t rgb; + if (SK_EXPECT(tail,0)) { + if ( true ) { rgb = vld3_lane_u16(ptr + 0, rgb, 0); } + if (tail > 1) { rgb = vld3_lane_u16(ptr + 3, rgb, 1); } + if (tail > 2) { rgb = vld3_lane_u16(ptr + 6, rgb, 2); } + } else { + rgb = vld3_u16(ptr); + } + *r = rgb.val[0]; + *g = rgb.val[1]; + *b = rgb.val[2]; + } + SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { + uint16x4x4_t rgba; + if (SK_EXPECT(tail,0)) { + if ( true ) { rgba = vld4_lane_u16(ptr + 0, rgba, 0); } + if (tail > 1) { rgba = vld4_lane_u16(ptr + 4, rgba, 1); } + if (tail > 2) { rgba = vld4_lane_u16(ptr + 8, rgba, 2); } + } else { + rgba = vld4_u16(ptr); + } + *r = rgba.val[0]; + *g = rgba.val[1]; + *b = rgba.val[2]; + *a = rgba.val[3]; + } + + SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { + if (SK_EXPECT(tail,0)) { + if ( true ) { vst4_lane_u16(ptr + 0, (uint16x4x4_t{{r,g,b,a}}), 0); } + if (tail > 1) { vst4_lane_u16(ptr + 4, (uint16x4x4_t{{r,g,b,a}}), 1); } + if (tail > 2) { vst4_lane_u16(ptr + 8, (uint16x4x4_t{{r,g,b,a}}), 2); } + } else { + vst4_u16(ptr, (uint16x4x4_t{{r,g,b,a}})); + } + } + SI void load2(const float* ptr, size_t tail, F* r, F* g) { + float32x4x2_t rg; + if (SK_EXPECT(tail,0)) { + if ( true ) { rg = vld2q_lane_f32(ptr + 0, rg, 0); } + if (tail > 1) { rg = vld2q_lane_f32(ptr + 2, rg, 1); } + if (tail > 2) { rg = vld2q_lane_f32(ptr + 4, rg, 2); } + } else { + rg = vld2q_f32(ptr); + } + *r = rg.val[0]; + *g = rg.val[1]; + } + SI void store2(float* ptr, size_t tail, F r, F g) { + if (SK_EXPECT(tail,0)) { + if ( true ) { vst2q_lane_f32(ptr + 0, (float32x4x2_t{{r,g}}), 0); } + if (tail > 1) { vst2q_lane_f32(ptr + 2, (float32x4x2_t{{r,g}}), 1); } + if (tail > 2) { vst2q_lane_f32(ptr + 4, (float32x4x2_t{{r,g}}), 2); } + } else { + vst2q_f32(ptr, (float32x4x2_t{{r,g}})); + } + } + SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { + float32x4x4_t rgba; + if (SK_EXPECT(tail,0)) { + if ( true ) { rgba = vld4q_lane_f32(ptr + 0, rgba, 0); } + if (tail > 1) { rgba = vld4q_lane_f32(ptr + 4, rgba, 1); } + if (tail > 2) { rgba = vld4q_lane_f32(ptr + 8, rgba, 2); } + } else { + rgba = vld4q_f32(ptr); + } + *r = rgba.val[0]; + *g = rgba.val[1]; + *b = rgba.val[2]; + *a = rgba.val[3]; + } + SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { + if (SK_EXPECT(tail,0)) { + if ( true ) { vst4q_lane_f32(ptr + 0, (float32x4x4_t{{r,g,b,a}}), 0); } + if (tail > 1) { vst4q_lane_f32(ptr + 4, (float32x4x4_t{{r,g,b,a}}), 1); } + if (tail > 2) { vst4q_lane_f32(ptr + 8, (float32x4x4_t{{r,g,b,a}}), 2); } + } else { + vst4q_f32(ptr, (float32x4x4_t{{r,g,b,a}})); + } + } + +#elif defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + // These are __m256 and __m256i, but friendlier and strongly-typed. + template using V = SK_VECTORTYPE(T, 8); + using F = V; + using I32 = V< int32_t>; + using U64 = V; + using U32 = V; + using U16 = V; + using U8 = V; + + SI F mad(F f, F m, F a) { return _mm256_fmadd_ps(f, m, a); } + + SI F min(F a, F b) { return _mm256_min_ps(a,b); } + SI I32 min(I32 a, I32 b) { return _mm256_min_epi32(a,b); } + SI U32 min(U32 a, U32 b) { return _mm256_min_epu32(a,b); } + SI F max(F a, F b) { return _mm256_max_ps(a,b); } + SI I32 max(I32 a, I32 b) { return _mm256_max_epi32(a,b); } + SI U32 max(U32 a, U32 b) { return _mm256_max_epu32(a,b); } + + SI F abs_ (F v) { return _mm256_and_ps(v, 0-v); } + SI I32 abs_ (I32 v) { return _mm256_abs_epi32(v); } + SI F floor_(F v) { return _mm256_floor_ps(v); } + SI F ceil_(F v) { return _mm256_ceil_ps(v); } + SI F rcp_fast(F v) { return _mm256_rcp_ps (v); } + SI F rsqrt (F v) { return _mm256_rsqrt_ps(v); } + SI F sqrt_ (F v) { return _mm256_sqrt_ps (v); } + SI F rcp_precise (F v) { + F e = rcp_fast(v); + return _mm256_mul_ps(_mm256_fnmadd_ps(v, e, _mm256_set1_ps(2.0f)), e); + } + + SI U32 round (F v, F scale) { return _mm256_cvtps_epi32(v*scale); } + SI U16 pack(U32 v) { + return _mm_packus_epi32(_mm256_extractf128_si256(v, 0), + _mm256_extractf128_si256(v, 1)); + } + SI U8 pack(U16 v) { + auto r = _mm_packus_epi16(v,v); + return sk_unaligned_load(&r); + } + + SI F if_then_else(I32 c, F t, F e) { return _mm256_blendv_ps(e, t, _mm256_castsi256_ps(c)); } + // NOTE: This version of 'all' only works with mask values (true == all bits set) + SI bool any(I32 c) { return !_mm256_testz_si256(c, _mm256_set1_epi32(-1)); } + SI bool all(I32 c) { return _mm256_testc_si256(c, _mm256_set1_epi32(-1)); } + + template + SI V gather(const T* p, U32 ix) { + return { p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]], + p[ix[4]], p[ix[5]], p[ix[6]], p[ix[7]], }; + } + SI F gather(const float* p, U32 ix) { return _mm256_i32gather_ps (p, ix, 4); } + SI U32 gather(const uint32_t* p, U32 ix) { return _mm256_i32gather_epi32((const int*)p, ix, 4); } + SI U64 gather(const uint64_t* p, U32 ix) { + __m256i parts[] = { + _mm256_i32gather_epi64((const long long int*)p, _mm256_extracti128_si256(ix,0), 8), + _mm256_i32gather_epi64((const long long int*)p, _mm256_extracti128_si256(ix,1), 8), + }; + return sk_bit_cast(parts); + } + template + SI void scatter_masked(V src, S* dst, U32 ix, I32 mask) { + V before = gather(dst, ix); + V after = if_then_else(mask, src, before); + dst[ix[0]] = after[0]; + dst[ix[1]] = after[1]; + dst[ix[2]] = after[2]; + dst[ix[3]] = after[3]; + dst[ix[4]] = after[4]; + dst[ix[5]] = after[5]; + dst[ix[6]] = after[6]; + dst[ix[7]] = after[7]; + } + + SI void load2(const uint16_t* ptr, size_t tail, U16* r, U16* g) { + U16 _0123, _4567; + if (SK_EXPECT(tail,0)) { + _0123 = _4567 = _mm_setzero_si128(); + auto* d = &_0123; + if (tail > 3) { + *d = _mm_loadu_si128(((__m128i*)ptr) + 0); + tail -= 4; + ptr += 8; + d = &_4567; + } + bool high = false; + if (tail > 1) { + *d = _mm_loadl_epi64((__m128i*)ptr); + tail -= 2; + ptr += 4; + high = true; + } + if (tail > 0) { + (*d)[high ? 4 : 0] = *(ptr + 0); + (*d)[high ? 5 : 1] = *(ptr + 1); + } + } else { + _0123 = _mm_loadu_si128(((__m128i*)ptr) + 0); + _4567 = _mm_loadu_si128(((__m128i*)ptr) + 1); + } + *r = _mm_packs_epi32(_mm_srai_epi32(_mm_slli_epi32(_0123, 16), 16), + _mm_srai_epi32(_mm_slli_epi32(_4567, 16), 16)); + *g = _mm_packs_epi32(_mm_srai_epi32(_0123, 16), + _mm_srai_epi32(_4567, 16)); + } + SI void store2(uint16_t* ptr, size_t tail, U16 r, U16 g) { + auto _0123 = _mm_unpacklo_epi16(r, g), + _4567 = _mm_unpackhi_epi16(r, g); + if (SK_EXPECT(tail,0)) { + const auto* s = &_0123; + if (tail > 3) { + _mm_storeu_si128((__m128i*)ptr, *s); + s = &_4567; + tail -= 4; + ptr += 8; + } + bool high = false; + if (tail > 1) { + _mm_storel_epi64((__m128i*)ptr, *s); + ptr += 4; + tail -= 2; + high = true; + } + if (tail > 0) { + if (high) { + *(int32_t*)ptr = _mm_extract_epi32(*s, 2); + } else { + *(int32_t*)ptr = _mm_cvtsi128_si32(*s); + } + } + } else { + _mm_storeu_si128((__m128i*)ptr + 0, _0123); + _mm_storeu_si128((__m128i*)ptr + 1, _4567); + } + } + + SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { + __m128i _0,_1,_2,_3,_4,_5,_6,_7; + if (SK_EXPECT(tail,0)) { + auto load_rgb = [](const uint16_t* src) { + auto v = _mm_cvtsi32_si128(*(const uint32_t*)src); + return _mm_insert_epi16(v, src[2], 2); + }; + _1 = _2 = _3 = _4 = _5 = _6 = _7 = _mm_setzero_si128(); + if ( true ) { _0 = load_rgb(ptr + 0); } + if (tail > 1) { _1 = load_rgb(ptr + 3); } + if (tail > 2) { _2 = load_rgb(ptr + 6); } + if (tail > 3) { _3 = load_rgb(ptr + 9); } + if (tail > 4) { _4 = load_rgb(ptr + 12); } + if (tail > 5) { _5 = load_rgb(ptr + 15); } + if (tail > 6) { _6 = load_rgb(ptr + 18); } + } else { + // Load 0+1, 2+3, 4+5 normally, and 6+7 backed up 4 bytes so we don't run over. + auto _01 = _mm_loadu_si128((const __m128i*)(ptr + 0)) ; + auto _23 = _mm_loadu_si128((const __m128i*)(ptr + 6)) ; + auto _45 = _mm_loadu_si128((const __m128i*)(ptr + 12)) ; + auto _67 = _mm_srli_si128(_mm_loadu_si128((const __m128i*)(ptr + 16)), 4); + _0 = _01; _1 = _mm_srli_si128(_01, 6); + _2 = _23; _3 = _mm_srli_si128(_23, 6); + _4 = _45; _5 = _mm_srli_si128(_45, 6); + _6 = _67; _7 = _mm_srli_si128(_67, 6); + } + + auto _02 = _mm_unpacklo_epi16(_0, _2), // r0 r2 g0 g2 b0 b2 xx xx + _13 = _mm_unpacklo_epi16(_1, _3), + _46 = _mm_unpacklo_epi16(_4, _6), + _57 = _mm_unpacklo_epi16(_5, _7); + + auto rg0123 = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 + bx0123 = _mm_unpackhi_epi16(_02, _13), // b0 b1 b2 b3 xx xx xx xx + rg4567 = _mm_unpacklo_epi16(_46, _57), + bx4567 = _mm_unpackhi_epi16(_46, _57); + + *r = _mm_unpacklo_epi64(rg0123, rg4567); + *g = _mm_unpackhi_epi64(rg0123, rg4567); + *b = _mm_unpacklo_epi64(bx0123, bx4567); + } + SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { + __m128i _01, _23, _45, _67; + if (SK_EXPECT(tail,0)) { + auto src = (const double*)ptr; + _01 = _23 = _45 = _67 = _mm_setzero_si128(); + if (tail > 0) { _01 = _mm_castpd_si128(_mm_loadl_pd(_mm_castsi128_pd(_01), src+0)); } + if (tail > 1) { _01 = _mm_castpd_si128(_mm_loadh_pd(_mm_castsi128_pd(_01), src+1)); } + if (tail > 2) { _23 = _mm_castpd_si128(_mm_loadl_pd(_mm_castsi128_pd(_23), src+2)); } + if (tail > 3) { _23 = _mm_castpd_si128(_mm_loadh_pd(_mm_castsi128_pd(_23), src+3)); } + if (tail > 4) { _45 = _mm_castpd_si128(_mm_loadl_pd(_mm_castsi128_pd(_45), src+4)); } + if (tail > 5) { _45 = _mm_castpd_si128(_mm_loadh_pd(_mm_castsi128_pd(_45), src+5)); } + if (tail > 6) { _67 = _mm_castpd_si128(_mm_loadl_pd(_mm_castsi128_pd(_67), src+6)); } + } else { + _01 = _mm_loadu_si128(((__m128i*)ptr) + 0); + _23 = _mm_loadu_si128(((__m128i*)ptr) + 1); + _45 = _mm_loadu_si128(((__m128i*)ptr) + 2); + _67 = _mm_loadu_si128(((__m128i*)ptr) + 3); + } + + auto _02 = _mm_unpacklo_epi16(_01, _23), // r0 r2 g0 g2 b0 b2 a0 a2 + _13 = _mm_unpackhi_epi16(_01, _23), // r1 r3 g1 g3 b1 b3 a1 a3 + _46 = _mm_unpacklo_epi16(_45, _67), + _57 = _mm_unpackhi_epi16(_45, _67); + + auto rg0123 = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 + ba0123 = _mm_unpackhi_epi16(_02, _13), // b0 b1 b2 b3 a0 a1 a2 a3 + rg4567 = _mm_unpacklo_epi16(_46, _57), + ba4567 = _mm_unpackhi_epi16(_46, _57); + + *r = _mm_unpacklo_epi64(rg0123, rg4567); + *g = _mm_unpackhi_epi64(rg0123, rg4567); + *b = _mm_unpacklo_epi64(ba0123, ba4567); + *a = _mm_unpackhi_epi64(ba0123, ba4567); + } + SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { + auto rg0123 = _mm_unpacklo_epi16(r, g), // r0 g0 r1 g1 r2 g2 r3 g3 + rg4567 = _mm_unpackhi_epi16(r, g), // r4 g4 r5 g5 r6 g6 r7 g7 + ba0123 = _mm_unpacklo_epi16(b, a), + ba4567 = _mm_unpackhi_epi16(b, a); + + auto _01 = _mm_unpacklo_epi32(rg0123, ba0123), + _23 = _mm_unpackhi_epi32(rg0123, ba0123), + _45 = _mm_unpacklo_epi32(rg4567, ba4567), + _67 = _mm_unpackhi_epi32(rg4567, ba4567); + + if (SK_EXPECT(tail,0)) { + auto dst = (double*)ptr; + if (tail > 0) { _mm_storel_pd(dst+0, _mm_castsi128_pd(_01)); } + if (tail > 1) { _mm_storeh_pd(dst+1, _mm_castsi128_pd(_01)); } + if (tail > 2) { _mm_storel_pd(dst+2, _mm_castsi128_pd(_23)); } + if (tail > 3) { _mm_storeh_pd(dst+3, _mm_castsi128_pd(_23)); } + if (tail > 4) { _mm_storel_pd(dst+4, _mm_castsi128_pd(_45)); } + if (tail > 5) { _mm_storeh_pd(dst+5, _mm_castsi128_pd(_45)); } + if (tail > 6) { _mm_storel_pd(dst+6, _mm_castsi128_pd(_67)); } + } else { + _mm_storeu_si128((__m128i*)ptr + 0, _01); + _mm_storeu_si128((__m128i*)ptr + 1, _23); + _mm_storeu_si128((__m128i*)ptr + 2, _45); + _mm_storeu_si128((__m128i*)ptr + 3, _67); + } + } + + SI void load2(const float* ptr, size_t tail, F* r, F* g) { + F _0123, _4567; + if (SK_EXPECT(tail, 0)) { + _0123 = _4567 = _mm256_setzero_ps(); + F* d = &_0123; + if (tail > 3) { + *d = _mm256_loadu_ps(ptr); + ptr += 8; + tail -= 4; + d = &_4567; + } + bool high = false; + if (tail > 1) { + *d = _mm256_castps128_ps256(_mm_loadu_ps(ptr)); + ptr += 4; + tail -= 2; + high = true; + } + if (tail > 0) { + *d = high ? _mm256_insertf128_ps(*d, _mm_castsi128_ps(_mm_loadl_epi64((__m128i*)ptr)), 1) + : _mm256_insertf128_ps(*d, _mm_castsi128_ps(_mm_loadl_epi64((__m128i*)ptr)), 0); + } + } else { + _0123 = _mm256_loadu_ps(ptr + 0); + _4567 = _mm256_loadu_ps(ptr + 8); + } + + F _0145 = _mm256_castpd_ps(_mm256_permute2f128_pd(_mm256_castps_pd(_0123), _mm256_castps_pd(_4567), 0x20)), + _2367 = _mm256_castpd_ps(_mm256_permute2f128_pd(_mm256_castps_pd(_0123), _mm256_castps_pd(_4567), 0x31)); + + *r = _mm256_shuffle_ps(_0145, _2367, 0x88); + *g = _mm256_shuffle_ps(_0145, _2367, 0xDD); + } + SI void store2(float* ptr, size_t tail, F r, F g) { + F _0145 = _mm256_unpacklo_ps(r, g), + _2367 = _mm256_unpackhi_ps(r, g); + F _0123 = _mm256_castpd_ps(_mm256_permute2f128_pd(_mm256_castps_pd(_0145), _mm256_castps_pd(_2367), 0x20)), + _4567 = _mm256_castpd_ps(_mm256_permute2f128_pd(_mm256_castps_pd(_0145), _mm256_castps_pd(_2367), 0x31)); + + if (SK_EXPECT(tail, 0)) { + const __m256* s = (__m256*)&_0123; + if (tail > 3) { + _mm256_storeu_ps(ptr, *s); + s = (__m256*)&_4567; + tail -= 4; + ptr += 8; + } + bool high = false; + if (tail > 1) { + _mm_storeu_ps(ptr, _mm256_extractf128_ps(*s, 0)); + ptr += 4; + tail -= 2; + high = true; + } + if (tail > 0) { + *(ptr + 0) = (*s)[ high ? 4 : 0]; + *(ptr + 1) = (*s)[ high ? 5 : 1]; + } + } else { + _mm256_storeu_ps(ptr + 0, _0123); + _mm256_storeu_ps(ptr + 8, _4567); + } + } + + SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { + F _04, _15, _26, _37; + _04 = _15 = _26 = _37 = 0; + switch (tail) { + case 0: _37 = _mm256_insertf128_ps(_37, _mm_loadu_ps(ptr+28), 1); [[fallthrough]]; + case 7: _26 = _mm256_insertf128_ps(_26, _mm_loadu_ps(ptr+24), 1); [[fallthrough]]; + case 6: _15 = _mm256_insertf128_ps(_15, _mm_loadu_ps(ptr+20), 1); [[fallthrough]]; + case 5: _04 = _mm256_insertf128_ps(_04, _mm_loadu_ps(ptr+16), 1); [[fallthrough]]; + case 4: _37 = _mm256_insertf128_ps(_37, _mm_loadu_ps(ptr+12), 0); [[fallthrough]]; + case 3: _26 = _mm256_insertf128_ps(_26, _mm_loadu_ps(ptr+ 8), 0); [[fallthrough]]; + case 2: _15 = _mm256_insertf128_ps(_15, _mm_loadu_ps(ptr+ 4), 0); [[fallthrough]]; + case 1: _04 = _mm256_insertf128_ps(_04, _mm_loadu_ps(ptr+ 0), 0); + } + + F rg0145 = _mm256_unpacklo_ps(_04,_15), // r0 r1 g0 g1 | r4 r5 g4 g5 + ba0145 = _mm256_unpackhi_ps(_04,_15), + rg2367 = _mm256_unpacklo_ps(_26,_37), + ba2367 = _mm256_unpackhi_ps(_26,_37); + + *r = _mm256_castpd_ps(_mm256_unpacklo_pd(_mm256_castps_pd(rg0145), _mm256_castps_pd(rg2367))); + *g = _mm256_castpd_ps(_mm256_unpackhi_pd(_mm256_castps_pd(rg0145), _mm256_castps_pd(rg2367))); + *b = _mm256_castpd_ps(_mm256_unpacklo_pd(_mm256_castps_pd(ba0145), _mm256_castps_pd(ba2367))); + *a = _mm256_castpd_ps(_mm256_unpackhi_pd(_mm256_castps_pd(ba0145), _mm256_castps_pd(ba2367))); + } + SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { + F rg0145 = _mm256_unpacklo_ps(r, g), // r0 g0 r1 g1 | r4 g4 r5 g5 + rg2367 = _mm256_unpackhi_ps(r, g), // r2 ... | r6 ... + ba0145 = _mm256_unpacklo_ps(b, a), // b0 a0 b1 a1 | b4 a4 b5 a5 + ba2367 = _mm256_unpackhi_ps(b, a); // b2 ... | b6 ... + + F _04 = _mm256_castpd_ps(_mm256_unpacklo_pd(_mm256_castps_pd(rg0145), _mm256_castps_pd(ba0145))), // r0 g0 b0 a0 | r4 g4 b4 a4 + _15 = _mm256_castpd_ps(_mm256_unpackhi_pd(_mm256_castps_pd(rg0145), _mm256_castps_pd(ba0145))), // r1 ... | r5 ... + _26 = _mm256_castpd_ps(_mm256_unpacklo_pd(_mm256_castps_pd(rg2367), _mm256_castps_pd(ba2367))), // r2 ... | r6 ... + _37 = _mm256_castpd_ps(_mm256_unpackhi_pd(_mm256_castps_pd(rg2367), _mm256_castps_pd(ba2367))); // r3 ... | r7 ... + + if (SK_EXPECT(tail, 0)) { + if (tail > 0) { _mm_storeu_ps(ptr+ 0, _mm256_extractf128_ps(_04, 0)); } + if (tail > 1) { _mm_storeu_ps(ptr+ 4, _mm256_extractf128_ps(_15, 0)); } + if (tail > 2) { _mm_storeu_ps(ptr+ 8, _mm256_extractf128_ps(_26, 0)); } + if (tail > 3) { _mm_storeu_ps(ptr+12, _mm256_extractf128_ps(_37, 0)); } + if (tail > 4) { _mm_storeu_ps(ptr+16, _mm256_extractf128_ps(_04, 1)); } + if (tail > 5) { _mm_storeu_ps(ptr+20, _mm256_extractf128_ps(_15, 1)); } + if (tail > 6) { _mm_storeu_ps(ptr+24, _mm256_extractf128_ps(_26, 1)); } + } else { + F _01 = _mm256_permute2f128_ps(_04, _15, 32), // 32 == 0010 0000 == lo, lo + _23 = _mm256_permute2f128_ps(_26, _37, 32), + _45 = _mm256_permute2f128_ps(_04, _15, 49), // 49 == 0011 0001 == hi, hi + _67 = _mm256_permute2f128_ps(_26, _37, 49); + _mm256_storeu_ps(ptr+ 0, _01); + _mm256_storeu_ps(ptr+ 8, _23); + _mm256_storeu_ps(ptr+16, _45); + _mm256_storeu_ps(ptr+24, _67); + } + } + +#elif defined(JUMPER_IS_SSE2) || defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) +template using V = SK_VECTORTYPE(T, 4); + using F = V; + using I32 = V< int32_t>; + using U64 = V; + using U32 = V; + using U16 = V; + using U8 = V; + + SI F if_then_else(I32 c, F t, F e) { + return _mm_or_ps(_mm_and_ps(_mm_castsi128_ps(c), t), _mm_andnot_ps(_mm_castsi128_ps(c), e)); + } + + SI F min(F a, F b) { return _mm_min_ps(a,b); } + SI F max(F a, F b) { return _mm_max_ps(a,b); } +#if defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + SI I32 min(I32 a, I32 b) { return _mm_min_epi32(a,b); } + SI U32 min(U32 a, U32 b) { return _mm_min_epu32(a,b); } + SI I32 max(I32 a, I32 b) { return _mm_max_epi32(a,b); } + SI U32 max(U32 a, U32 b) { return _mm_max_epu32(a,b); } +#else + SI I32 min(I32 a, I32 b) { + return sk_bit_cast(if_then_else(sk_bit_cast(a < b), sk_bit_cast(a), sk_bit_cast(b))); + } + SI U32 min(U32 a, U32 b) { + return sk_bit_cast(if_then_else(sk_bit_cast(a < b), sk_bit_cast(a), sk_bit_cast(b))); + } + SI I32 max(I32 a, I32 b) { + return sk_bit_cast(if_then_else(sk_bit_cast(a > b), sk_bit_cast(a), sk_bit_cast(b))); + } + SI U32 max(U32 a, U32 b) { + return sk_bit_cast(if_then_else(sk_bit_cast(a > b), sk_bit_cast(a), sk_bit_cast(b))); + } +#endif + + SI F mad(F f, F m, F a) { return f*m+a; } + SI F abs_(F v) { return _mm_and_ps(v, 0-v); } +#if defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + SI I32 abs_(I32 v) { return _mm_abs_epi32(v); } +#else + SI I32 abs_(I32 v) { return max(v, -v); } +#endif + SI F rcp_fast(F v) { return _mm_rcp_ps (v); } + SI F rcp_precise (F v) { F e = rcp_fast(v); return e * (2.0f - v * e); } + SI F rsqrt (F v) { return _mm_rsqrt_ps(v); } + SI F sqrt_(F v) { return _mm_sqrt_ps (v); } + + SI U32 round(F v, F scale) { return _mm_cvtps_epi32(v*scale); } + + SI U16 pack(U32 v) { + #if defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + auto p = _mm_packus_epi32(v,v); + #else + // Sign extend so that _mm_packs_epi32() does the pack we want. + auto p = _mm_srai_epi32(_mm_slli_epi32(v, 16), 16); + p = _mm_packs_epi32(p,p); + #endif + return sk_unaligned_load(&p); // We have two copies. Return (the lower) one. + } + SI U8 pack(U16 v) { + auto r = widen_cast<__m128i>(v); + r = _mm_packus_epi16(r,r); + return sk_unaligned_load(&r); + } + + // NOTE: This only checks the top bit of each lane, and is incorrect with non-mask values. + SI bool any(I32 c) { return _mm_movemask_ps(_mm_castsi128_ps(c)) != 0b0000; } + SI bool all(I32 c) { return _mm_movemask_ps(_mm_castsi128_ps(c)) == 0b1111; } + + SI F floor_(F v) { + #if defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + return _mm_floor_ps(v); + #else + F roundtrip = _mm_cvtepi32_ps(_mm_cvttps_epi32(v)); + return roundtrip - if_then_else(roundtrip > v, 1, 0); + #endif + } + + SI F ceil_(F v) { + #if defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + return _mm_ceil_ps(v); + #else + F roundtrip = _mm_cvtepi32_ps(_mm_cvttps_epi32(v)); + return roundtrip + if_then_else(roundtrip < v, 1, 0); + #endif + } + + template + SI V gather(const T* p, U32 ix) { + return {p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]]}; + } + template + SI void scatter_masked(V src, S* dst, U32 ix, I32 mask) { + V before = gather(dst, ix); + V after = if_then_else(mask, src, before); + dst[ix[0]] = after[0]; + dst[ix[1]] = after[1]; + dst[ix[2]] = after[2]; + dst[ix[3]] = after[3]; + } + SI void load2(const uint16_t* ptr, size_t tail, U16* r, U16* g) { + __m128i _01; + if (SK_EXPECT(tail,0)) { + _01 = _mm_setzero_si128(); + if (tail > 1) { + _01 = _mm_castpd_si128(_mm_loadl_pd(_mm_castsi128_pd(_01), (const double*)ptr)); // r0 g0 r1 g1 00 00 00 00 + if (tail > 2) { + _01 = _mm_insert_epi16(_01, *(ptr+4), 4); // r0 g0 r1 g1 r2 00 00 00 + _01 = _mm_insert_epi16(_01, *(ptr+5), 5); // r0 g0 r1 g1 r2 g2 00 00 + } + } else { + _01 = _mm_cvtsi32_si128(*(const uint32_t*)ptr); // r0 g0 00 00 00 00 00 00 + } + } else { + _01 = _mm_loadu_si128(((__m128i*)ptr) + 0); // r0 g0 r1 g1 r2 g2 r3 g3 + } + auto rg01_23 = _mm_shufflelo_epi16(_01, 0xD8); // r0 r1 g0 g1 r2 g2 r3 g3 + auto rg = _mm_shufflehi_epi16(rg01_23, 0xD8); // r0 r1 g0 g1 r2 r3 g2 g3 + + auto R = _mm_shuffle_epi32(rg, 0x88); // r0 r1 r2 r3 r0 r1 r2 r3 + auto G = _mm_shuffle_epi32(rg, 0xDD); // g0 g1 g2 g3 g0 g1 g2 g3 + *r = sk_unaligned_load(&R); + *g = sk_unaligned_load(&G); + } + SI void store2(uint16_t* ptr, size_t tail, U16 r, U16 g) { + U32 rg = _mm_unpacklo_epi16(widen_cast<__m128i>(r), widen_cast<__m128i>(g)); + if (SK_EXPECT(tail, 0)) { + if (tail > 1) { + _mm_storel_epi64((__m128i*)ptr, rg); + if (tail > 2) { + int32_t rgpair = rg[2]; + memcpy(ptr + 4, &rgpair, sizeof(rgpair)); + } + } else { + int32_t rgpair = rg[0]; + memcpy(ptr, &rgpair, sizeof(rgpair)); + } + } else { + _mm_storeu_si128((__m128i*)ptr + 0, rg); + } + } + + SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { + __m128i _0, _1, _2, _3; + if (SK_EXPECT(tail,0)) { + _1 = _2 = _3 = _mm_setzero_si128(); + auto load_rgb = [](const uint16_t* src) { + auto v = _mm_cvtsi32_si128(*(const uint32_t*)src); + return _mm_insert_epi16(v, src[2], 2); + }; + if ( true ) { _0 = load_rgb(ptr + 0); } + if (tail > 1) { _1 = load_rgb(ptr + 3); } + if (tail > 2) { _2 = load_rgb(ptr + 6); } + } else { + // Load slightly weirdly to make sure we don't load past the end of 4x48 bits. + auto _01 = _mm_loadu_si128((const __m128i*)(ptr + 0)) , + _23 = _mm_srli_si128(_mm_loadu_si128((const __m128i*)(ptr + 4)), 4); + + // Each _N holds R,G,B for pixel N in its lower 3 lanes (upper 5 are ignored). + _0 = _01; + _1 = _mm_srli_si128(_01, 6); + _2 = _23; + _3 = _mm_srli_si128(_23, 6); + } + + // De-interlace to R,G,B. + auto _02 = _mm_unpacklo_epi16(_0, _2), // r0 r2 g0 g2 b0 b2 xx xx + _13 = _mm_unpacklo_epi16(_1, _3); // r1 r3 g1 g3 b1 b3 xx xx + + auto R = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 + G = _mm_srli_si128(R, 8), + B = _mm_unpackhi_epi16(_02, _13); // b0 b1 b2 b3 xx xx xx xx + + *r = sk_unaligned_load(&R); + *g = sk_unaligned_load(&G); + *b = sk_unaligned_load(&B); + } + + SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { + __m128i _01, _23; + if (SK_EXPECT(tail,0)) { + _01 = _23 = _mm_setzero_si128(); + auto src = (const double*)ptr; + if ( true ) { _01 = _mm_castpd_si128(_mm_loadl_pd(_mm_castsi128_pd(_01), src + 0)); } // r0 g0 b0 a0 00 00 00 00 + if (tail > 1) { _01 = _mm_castpd_si128(_mm_loadh_pd(_mm_castsi128_pd(_01), src + 1)); } // r0 g0 b0 a0 r1 g1 b1 a1 + if (tail > 2) { _23 = _mm_castpd_si128(_mm_loadl_pd(_mm_castsi128_pd(_23), src + 2)); } // r2 g2 b2 a2 00 00 00 00 + } else { + _01 = _mm_loadu_si128(((__m128i*)ptr) + 0); // r0 g0 b0 a0 r1 g1 b1 a1 + _23 = _mm_loadu_si128(((__m128i*)ptr) + 1); // r2 g2 b2 a2 r3 g3 b3 a3 + } + + auto _02 = _mm_unpacklo_epi16(_01, _23), // r0 r2 g0 g2 b0 b2 a0 a2 + _13 = _mm_unpackhi_epi16(_01, _23); // r1 r3 g1 g3 b1 b3 a1 a3 + + auto rg = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 + ba = _mm_unpackhi_epi16(_02, _13); // b0 b1 b2 b3 a0 a1 a2 a3 + + *r = sk_unaligned_load((uint16_t*)&rg + 0); + *g = sk_unaligned_load((uint16_t*)&rg + 4); + *b = sk_unaligned_load((uint16_t*)&ba + 0); + *a = sk_unaligned_load((uint16_t*)&ba + 4); + } + + SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { + auto rg = _mm_unpacklo_epi16(widen_cast<__m128i>(r), widen_cast<__m128i>(g)), + ba = _mm_unpacklo_epi16(widen_cast<__m128i>(b), widen_cast<__m128i>(a)); + + if (SK_EXPECT(tail, 0)) { + auto dst = (double*)ptr; + if ( true ) { _mm_storel_pd(dst + 0, _mm_castsi128_pd(_mm_unpacklo_epi32(rg, ba))); } + if (tail > 1) { _mm_storeh_pd(dst + 1, _mm_castsi128_pd(_mm_unpacklo_epi32(rg, ba))); } + if (tail > 2) { _mm_storel_pd(dst + 2, _mm_castsi128_pd(_mm_unpackhi_epi32(rg, ba))); } + } else { + _mm_storeu_si128((__m128i*)ptr + 0, _mm_unpacklo_epi32(rg, ba)); + _mm_storeu_si128((__m128i*)ptr + 1, _mm_unpackhi_epi32(rg, ba)); + } + } + + SI void load2(const float* ptr, size_t tail, F* r, F* g) { + F _01, _23; + if (SK_EXPECT(tail, 0)) { + _01 = _23 = _mm_setzero_ps(); + if ( true ) { _01 = _mm_loadl_pi(_01, (__m64 const*)(ptr + 0)); } + if (tail > 1) { _01 = _mm_loadh_pi(_01, (__m64 const*)(ptr + 2)); } + if (tail > 2) { _23 = _mm_loadl_pi(_23, (__m64 const*)(ptr + 4)); } + } else { + _01 = _mm_loadu_ps(ptr + 0); + _23 = _mm_loadu_ps(ptr + 4); + } + *r = _mm_shuffle_ps(_01, _23, 0x88); + *g = _mm_shuffle_ps(_01, _23, 0xDD); + } + SI void store2(float* ptr, size_t tail, F r, F g) { + F _01 = _mm_unpacklo_ps(r, g), + _23 = _mm_unpackhi_ps(r, g); + if (SK_EXPECT(tail, 0)) { + if ( true ) { _mm_storel_pi((__m64*)(ptr + 0), _01); } + if (tail > 1) { _mm_storeh_pi((__m64*)(ptr + 2), _01); } + if (tail > 2) { _mm_storel_pi((__m64*)(ptr + 4), _23); } + } else { + _mm_storeu_ps(ptr + 0, _01); + _mm_storeu_ps(ptr + 4, _23); + } + } + + SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { + F _0, _1, _2, _3; + if (SK_EXPECT(tail, 0)) { + _1 = _2 = _3 = _mm_setzero_ps(); + if ( true ) { _0 = _mm_loadu_ps(ptr + 0); } + if (tail > 1) { _1 = _mm_loadu_ps(ptr + 4); } + if (tail > 2) { _2 = _mm_loadu_ps(ptr + 8); } + } else { + _0 = _mm_loadu_ps(ptr + 0); + _1 = _mm_loadu_ps(ptr + 4); + _2 = _mm_loadu_ps(ptr + 8); + _3 = _mm_loadu_ps(ptr +12); + } + _MM_TRANSPOSE4_PS(_0,_1,_2,_3); + *r = _0; + *g = _1; + *b = _2; + *a = _3; + } + + SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { + _MM_TRANSPOSE4_PS(r,g,b,a); + if (SK_EXPECT(tail, 0)) { + if ( true ) { _mm_storeu_ps(ptr + 0, r); } + if (tail > 1) { _mm_storeu_ps(ptr + 4, g); } + if (tail > 2) { _mm_storeu_ps(ptr + 8, b); } + } else { + _mm_storeu_ps(ptr + 0, r); + _mm_storeu_ps(ptr + 4, g); + _mm_storeu_ps(ptr + 8, b); + _mm_storeu_ps(ptr +12, a); + } + } +#endif + +// We need to be a careful with casts. +// (F)x means cast x to float in the portable path, but bit_cast x to float in the others. +// These named casts and bit_cast() are always what they seem to be. +#if defined(JUMPER_IS_SCALAR) + SI F cast (U32 v) { return (F)v; } + SI F cast64(U64 v) { return (F)v; } + SI U32 trunc_(F v) { return (U32)v; } + SI U32 expand(U16 v) { return (U32)v; } + SI U32 expand(U8 v) { return (U32)v; } +#else + SI F cast (U32 v) { return SK_CONVERTVECTOR(sk_bit_cast(v), F); } + SI F cast64(U64 v) { return SK_CONVERTVECTOR( v, F); } + SI U32 trunc_(F v) { return sk_bit_cast(SK_CONVERTVECTOR(v, I32)); } + SI U32 expand(U16 v) { return SK_CONVERTVECTOR( v, U32); } + SI U32 expand(U8 v) { return SK_CONVERTVECTOR( v, U32); } +#endif + +SI U32 if_then_else(I32 c, U32 t, U32 e) { + return sk_bit_cast(if_then_else(c, sk_bit_cast(t), sk_bit_cast(e))); +} + +SI I32 if_then_else(I32 c, I32 t, I32 e) { + return sk_bit_cast(if_then_else(c, sk_bit_cast(t), sk_bit_cast(e))); +} + +SI U16 bswap(U16 x) { +#if defined(JUMPER_IS_SSE2) || defined(JUMPER_IS_SSE41) + // Somewhat inexplicably Clang decides to do (x<<8) | (x>>8) in 32-bit lanes + // when generating code for SSE2 and SSE4.1. We'll do it manually... + auto v = widen_cast<__m128i>(x); + v = _mm_slli_epi16(v,8) | _mm_srli_epi16(v,8); + return sk_unaligned_load(&v); +#else + return (x<<8) | (x>>8); +#endif +} + +SI F fract(F v) { return v - floor_(v); } + +// See http://www.machinedlearnings.com/2011/06/fast-approximate-logarithm-exponential.html +SI F approx_log2(F x) { + // e - 127 is a fair approximation of log2(x) in its own right... + F e = cast(sk_bit_cast(x)) * (1.0f / (1<<23)); + + // ... but using the mantissa to refine its error is _much_ better. + F m = sk_bit_cast((sk_bit_cast(x) & 0x007fffff) | 0x3f000000); + return e + - 124.225514990f + - 1.498030302f * m + - 1.725879990f / (0.3520887068f + m); +} + +SI F approx_log(F x) { + const float ln2 = 0.69314718f; + return ln2 * approx_log2(x); +} + +SI F approx_pow2(F x) { + F f = fract(x); + return sk_bit_cast(round(1.0f * (1<<23), + x + 121.274057500f + - 1.490129070f * f + + 27.728023300f / (4.84252568f - f))); +} + +SI F approx_exp(F x) { + const float log2_e = 1.4426950408889634074f; + return approx_pow2(log2_e * x); +} + +SI F approx_powf(F x, F y) { + return if_then_else((x == 0)|(x == 1), x + , approx_pow2(approx_log2(x) * y)); +} + +SI F from_half(U16 h) { +#if defined(JUMPER_IS_NEON) && defined(SK_CPU_ARM64) \ + && !defined(SK_BUILD_FOR_GOOGLE3) // Temporary workaround for some Google3 builds. + return vcvt_f32_f16(sk_bit_cast(h)); + +#elif defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + return _mm256_cvtph_ps(h); + +#else + // Remember, a half is 1-5-10 (sign-exponent-mantissa) with 15 exponent bias. + U32 sem = expand(h), + s = sem & 0x8000, + em = sem ^ s; + + // Convert to 1-8-23 float with 127 bias, flushing denorm halfs (including zero) to zero. + auto denorm = sk_bit_cast(em) < 0x0400; // I32 comparison is often quicker, and always safe here. + return if_then_else(denorm, F(0) + , sk_bit_cast( (s<<16) + (em<<13) + ((127-15)<<23) )); +#endif +} + +SI U16 to_half(F f) { +#if defined(JUMPER_IS_NEON) && defined(SK_CPU_ARM64) \ + && !defined(SK_BUILD_FOR_GOOGLE3) // Temporary workaround for some Google3 builds. + return sk_bit_cast(vcvt_f16_f32(f)); + +#elif defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + return _mm256_cvtps_ph(f, _MM_FROUND_CUR_DIRECTION); + +#else + // Remember, a float is 1-8-23 (sign-exponent-mantissa) with 127 exponent bias. + U32 sem = sk_bit_cast(f), + s = sem & 0x80000000, + em = sem ^ s; + + // Convert to 1-5-10 half with 15 bias, flushing denorm halfs (including zero) to zero. + auto denorm = sk_bit_cast(em) < 0x38800000; // I32 comparison is often quicker, and always safe here. + return pack(if_then_else(denorm, U32(0) + , (s>>16) + (em>>13) - ((127-15)<<10))); +#endif +} + +// Our fundamental vector depth is our pixel stride. +static constexpr size_t N = sizeof(F) / sizeof(float); + +// We're finally going to get to what a Stage function looks like! +// tail == 0 ~~> work on a full N pixels +// tail != 0 ~~> work on only the first tail pixels +// tail is always < N. + +// Any custom ABI to use for all (non-externally-facing) stage functions? +// Also decide here whether to use narrow (compromise) or wide (ideal) stages. +#if defined(SK_CPU_ARM32) && defined(JUMPER_IS_NEON) + // This lets us pass vectors more efficiently on 32-bit ARM. + // We can still only pass 16 floats, so best as 4x {r,g,b,a}. + #define ABI __attribute__((pcs("aapcs-vfp"))) + #define JUMPER_NARROW_STAGES 1 +#elif defined(_MSC_VER) + // Even if not vectorized, this lets us pass {r,g,b,a} as registers, + // instead of {b,a} on the stack. Narrow stages work best for __vectorcall. + #define ABI __vectorcall + #define JUMPER_NARROW_STAGES 1 +#elif defined(__x86_64__) || defined(SK_CPU_ARM64) + // These platforms are ideal for wider stages, and their default ABI is ideal. + #define ABI + #define JUMPER_NARROW_STAGES 0 +#else + // 32-bit or unknown... shunt them down the narrow path. + // Odds are these have few registers and are better off there. + #define ABI + #define JUMPER_NARROW_STAGES 1 +#endif + +#if JUMPER_NARROW_STAGES + struct Params { + size_t dx, dy, tail; + F dr,dg,db,da; + }; + using Stage = void(ABI*)(Params*, SkRasterPipelineStage* program, F r, F g, F b, F a); +#else + using Stage = void(ABI*)(size_t tail, SkRasterPipelineStage* program, size_t dx, size_t dy, + F,F,F,F, F,F,F,F); +#endif + +static void start_pipeline(size_t dx, size_t dy, + size_t xlimit, size_t ylimit, + SkRasterPipelineStage* program) { + auto start = (Stage)program->fn; + const size_t x0 = dx; + for (; dy < ylimit; dy++) { + #if JUMPER_NARROW_STAGES + Params params = { x0,dy,0, 0,0,0,0 }; + while (params.dx + N <= xlimit) { + start(¶ms,program, 0,0,0,0); + params.dx += N; + } + if (size_t tail = xlimit - params.dx) { + params.tail = tail; + start(¶ms,program, 0,0,0,0); + } + #else + dx = x0; + while (dx + N <= xlimit) { + start(0,program,dx,dy, 0,0,0,0, 0,0,0,0); + dx += N; + } + if (size_t tail = xlimit - dx) { + start(tail,program,dx,dy, 0,0,0,0, 0,0,0,0); + } + #endif + } +} + +#if SK_HAS_MUSTTAIL + #define JUMPER_MUSTTAIL [[clang::musttail]] +#else + #define JUMPER_MUSTTAIL +#endif + +#if JUMPER_NARROW_STAGES + #define DECLARE_STAGE(name, ARG, STAGE_RET, INC, OFFSET, MUSTTAIL) \ + SI STAGE_RET name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da); \ + static void ABI name(Params* params, SkRasterPipelineStage* program, \ + F r, F g, F b, F a) { \ + OFFSET name##_k(Ctx{program},params->dx,params->dy,params->tail, r,g,b,a,\ + params->dr, params->dg, params->db, params->da); \ + INC; \ + auto fn = (Stage)program->fn; \ + MUSTTAIL return fn(params, program, r,g,b,a); \ + } \ + SI STAGE_RET name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da) +#else + #define DECLARE_STAGE(name, ARG, STAGE_RET, INC, OFFSET, MUSTTAIL) \ + SI STAGE_RET name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da); \ + static void ABI name(size_t tail, SkRasterPipelineStage* program, size_t dx, size_t dy, \ + F r, F g, F b, F a, F dr, F dg, F db, F da) { \ + OFFSET name##_k(Ctx{program},dx,dy,tail, r,g,b,a, dr,dg,db,da); \ + INC; \ + auto fn = (Stage)program->fn; \ + MUSTTAIL return fn(tail, program, dx,dy, r,g,b,a, dr,dg,db,da); \ + } \ + SI STAGE_RET name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + F& r, F& g, F& b, F& a, F& dr, F& dg, F& db, F& da) +#endif + +// A typical stage returns void, always increments the program counter by 1, and lets the optimizer +// decide whether or not tail-calling is appropriate. +#define STAGE(name, arg) \ + DECLARE_STAGE(name, arg, void, ++program, /*no offset*/, /*no musttail*/) + +// A tail stage returns void, always increments the program counter by 1, and uses tail-calling. +// Tail-calling is necessary in SkSL-generated programs, which can be thousands of ops long, and +// could overflow the stack (particularly in debug). +#define STAGE_TAIL(name, arg) \ + DECLARE_STAGE(name, arg, void, ++program, /*no offset*/, JUMPER_MUSTTAIL) + +// A branch stage returns an integer, which is added directly to the program counter, and tailcalls. +#define STAGE_BRANCH(name, arg) \ + DECLARE_STAGE(name, arg, int, /*no increment*/, program +=, JUMPER_MUSTTAIL) + +// just_return() is a simple no-op stage that only exists to end the chain, +// returning back up to start_pipeline(), and from there to the caller. +#if JUMPER_NARROW_STAGES + static void ABI just_return(Params*, SkRasterPipelineStage*, F,F,F,F) {} +#else + static void ABI just_return(size_t, SkRasterPipelineStage*, size_t,size_t, F,F,F,F, F,F,F,F) {} +#endif + +// Note that in release builds, most stages consume no stack (thanks to tail call optimization). +// However: certain builds (especially with non-clang compilers) may fail to optimize tail +// calls, resulting in actual stack frames being generated. +// +// stack_checkpoint() and stack_rewind() are special stages that can be used to manage stack growth. +// If a pipeline contains a stack_checkpoint, followed by any number of stack_rewind (at any point), +// the C++ stack will be reset to the state it was at when the stack_checkpoint was initially hit. +// +// All instances of stack_rewind (as well as the one instance of stack_checkpoint near the start of +// a pipeline) share a single context (of type SkRasterPipeline_RewindCtx). That context holds the +// full state of the mutable registers that are normally passed to the next stage in the program. +// +// stack_rewind is the only stage other than just_return that actually returns (rather than jumping +// to the next stage in the program). Before it does so, it stashes all of the registers in the +// context. This includes the updated `program` pointer. Unlike stages that tail call exactly once, +// stack_checkpoint calls the next stage in the program repeatedly, as long as the `program` in the +// context is overwritten (i.e., as long as a stack_rewind was the reason the pipeline returned, +// rather than a just_return). +// +// Normally, just_return is the only stage that returns, and no other stage does anything after a +// subsequent (called) stage returns, so the stack just unwinds all the way to start_pipeline. +// With stack_checkpoint on the stack, any stack_rewind stages will return all the way up to the +// stack_checkpoint. That grabs the values that would have been passed to the next stage (from the +// context), and continues the linear execution of stages, but has reclaimed all of the stack frames +// pushed before the stack_rewind before doing so. +#if JUMPER_NARROW_STAGES + static void ABI stack_checkpoint(Params* params, SkRasterPipelineStage* program, + F r, F g, F b, F a) { + SkRasterPipeline_RewindCtx* ctx = Ctx{program}; + while (program) { + auto next = (Stage)(++program)->fn; + + ctx->stage = nullptr; + next(params, program, r, g, b, a); + program = ctx->stage; + + if (program) { + r = sk_unaligned_load(ctx->r ); + g = sk_unaligned_load(ctx->g ); + b = sk_unaligned_load(ctx->b ); + a = sk_unaligned_load(ctx->a ); + params->dr = sk_unaligned_load(ctx->dr); + params->dg = sk_unaligned_load(ctx->dg); + params->db = sk_unaligned_load(ctx->db); + params->da = sk_unaligned_load(ctx->da); + } + } + } + static void ABI stack_rewind(Params* params, SkRasterPipelineStage* program, + F r, F g, F b, F a) { + SkRasterPipeline_RewindCtx* ctx = Ctx{program}; + sk_unaligned_store(ctx->r , r ); + sk_unaligned_store(ctx->g , g ); + sk_unaligned_store(ctx->b , b ); + sk_unaligned_store(ctx->a , a ); + sk_unaligned_store(ctx->dr, params->dr); + sk_unaligned_store(ctx->dg, params->dg); + sk_unaligned_store(ctx->db, params->db); + sk_unaligned_store(ctx->da, params->da); + ctx->stage = program; + } +#else + static void ABI stack_checkpoint(size_t tail, SkRasterPipelineStage* program, + size_t dx, size_t dy, + F r, F g, F b, F a, F dr, F dg, F db, F da) { + SkRasterPipeline_RewindCtx* ctx = Ctx{program}; + while (program) { + auto next = (Stage)(++program)->fn; + + ctx->stage = nullptr; + next(tail, program, dx, dy, r, g, b, a, dr, dg, db, da); + program = ctx->stage; + + if (program) { + r = sk_unaligned_load(ctx->r ); + g = sk_unaligned_load(ctx->g ); + b = sk_unaligned_load(ctx->b ); + a = sk_unaligned_load(ctx->a ); + dr = sk_unaligned_load(ctx->dr); + dg = sk_unaligned_load(ctx->dg); + db = sk_unaligned_load(ctx->db); + da = sk_unaligned_load(ctx->da); + } + } + } + static void ABI stack_rewind(size_t tail, SkRasterPipelineStage* program, + size_t dx, size_t dy, + F r, F g, F b, F a, F dr, F dg, F db, F da) { + SkRasterPipeline_RewindCtx* ctx = Ctx{program}; + sk_unaligned_store(ctx->r , r ); + sk_unaligned_store(ctx->g , g ); + sk_unaligned_store(ctx->b , b ); + sk_unaligned_store(ctx->a , a ); + sk_unaligned_store(ctx->dr, dr); + sk_unaligned_store(ctx->dg, dg); + sk_unaligned_store(ctx->db, db); + sk_unaligned_store(ctx->da, da); + ctx->stage = program; + } +#endif + + +// We could start defining normal Stages now. But first, some helper functions. + +// These load() and store() methods are tail-aware, +// but focus mainly on keeping the at-stride tail==0 case fast. + +template +SI V load(const T* src, size_t tail) { +#if !defined(JUMPER_IS_SCALAR) + SK_ASSUME(tail < N); + if (SK_EXPECT(tail, 0)) { + V v{}; // Any inactive lanes are zeroed. + switch (tail) { + case 7: v[6] = src[6]; [[fallthrough]]; + case 6: v[5] = src[5]; [[fallthrough]]; + case 5: v[4] = src[4]; [[fallthrough]]; + case 4: memcpy(&v, src, 4*sizeof(T)); break; + case 3: v[2] = src[2]; [[fallthrough]]; + case 2: memcpy(&v, src, 2*sizeof(T)); break; + case 1: memcpy(&v, src, 1*sizeof(T)); break; + } + return v; + } +#endif + return sk_unaligned_load(src); +} + +template +SI void store(T* dst, V v, size_t tail) { +#if !defined(JUMPER_IS_SCALAR) + SK_ASSUME(tail < N); + if (SK_EXPECT(tail, 0)) { + switch (tail) { + case 7: dst[6] = v[6]; [[fallthrough]]; + case 6: dst[5] = v[5]; [[fallthrough]]; + case 5: dst[4] = v[4]; [[fallthrough]]; + case 4: memcpy(dst, &v, 4*sizeof(T)); break; + case 3: dst[2] = v[2]; [[fallthrough]]; + case 2: memcpy(dst, &v, 2*sizeof(T)); break; + case 1: memcpy(dst, &v, 1*sizeof(T)); break; + } + return; + } +#endif + sk_unaligned_store(dst, v); +} + +SI F from_byte(U8 b) { + return cast(expand(b)) * (1/255.0f); +} +SI F from_short(U16 s) { + return cast(expand(s)) * (1/65535.0f); +} +SI void from_565(U16 _565, F* r, F* g, F* b) { + U32 wide = expand(_565); + *r = cast(wide & (31<<11)) * (1.0f / (31<<11)); + *g = cast(wide & (63<< 5)) * (1.0f / (63<< 5)); + *b = cast(wide & (31<< 0)) * (1.0f / (31<< 0)); +} +SI void from_4444(U16 _4444, F* r, F* g, F* b, F* a) { + U32 wide = expand(_4444); + *r = cast(wide & (15<<12)) * (1.0f / (15<<12)); + *g = cast(wide & (15<< 8)) * (1.0f / (15<< 8)); + *b = cast(wide & (15<< 4)) * (1.0f / (15<< 4)); + *a = cast(wide & (15<< 0)) * (1.0f / (15<< 0)); +} +SI void from_8888(U32 _8888, F* r, F* g, F* b, F* a) { + *r = cast((_8888 ) & 0xff) * (1/255.0f); + *g = cast((_8888 >> 8) & 0xff) * (1/255.0f); + *b = cast((_8888 >> 16) & 0xff) * (1/255.0f); + *a = cast((_8888 >> 24) ) * (1/255.0f); +} +SI void from_88(U16 _88, F* r, F* g) { + U32 wide = expand(_88); + *r = cast((wide ) & 0xff) * (1/255.0f); + *g = cast((wide >> 8) & 0xff) * (1/255.0f); +} +SI void from_1010102(U32 rgba, F* r, F* g, F* b, F* a) { + *r = cast((rgba ) & 0x3ff) * (1/1023.0f); + *g = cast((rgba >> 10) & 0x3ff) * (1/1023.0f); + *b = cast((rgba >> 20) & 0x3ff) * (1/1023.0f); + *a = cast((rgba >> 30) ) * (1/ 3.0f); +} +SI void from_1010102_xr(U32 rgba, F* r, F* g, F* b, F* a) { + static constexpr float min = -0.752941f; + static constexpr float max = 1.25098f; + static constexpr float range = max - min; + *r = cast((rgba ) & 0x3ff) * (1/1023.0f) * range + min; + *g = cast((rgba >> 10) & 0x3ff) * (1/1023.0f) * range + min; + *b = cast((rgba >> 20) & 0x3ff) * (1/1023.0f) * range + min; + *a = cast((rgba >> 30) ) * (1/ 3.0f); +} +SI void from_1616(U32 _1616, F* r, F* g) { + *r = cast((_1616 ) & 0xffff) * (1/65535.0f); + *g = cast((_1616 >> 16) & 0xffff) * (1/65535.0f); +} +SI void from_16161616(U64 _16161616, F* r, F* g, F* b, F* a) { + *r = cast64((_16161616 ) & 0xffff) * (1/65535.0f); + *g = cast64((_16161616 >> 16) & 0xffff) * (1/65535.0f); + *b = cast64((_16161616 >> 32) & 0xffff) * (1/65535.0f); + *a = cast64((_16161616 >> 48) & 0xffff) * (1/65535.0f); +} + +// Used by load_ and store_ stages to get to the right (dx,dy) starting point of contiguous memory. +template +SI T* ptr_at_xy(const SkRasterPipeline_MemoryCtx* ctx, size_t dx, size_t dy) { + return (T*)ctx->pixels + dy*ctx->stride + dx; +} + +// clamp v to [0,limit). +SI F clamp(F v, F limit) { + F inclusive = sk_bit_cast( sk_bit_cast(limit) - 1 ); // Exclusive -> inclusive. + return min(max(0.0f, v), inclusive); +} + +// clamp to (0,limit). +SI F clamp_ex(F v, F limit) { + const F inclusiveZ = std::numeric_limits::min(), + inclusiveL = sk_bit_cast( sk_bit_cast(limit) - 1 ); + return min(max(inclusiveZ, v), inclusiveL); +} + +// Bhaskara I's sine approximation +// 16x(pi - x) / (5*pi^2 - 4x(pi - x) +// ... divide by 4 +// 4x(pi - x) / 5*pi^2/4 - x(pi - x) +// +// This is a good approximation only for 0 <= x <= pi, so we use symmetries to get +// radians into that range first. +SI F sin_(F v) { + constexpr float Pi = SK_ScalarPI; + F x = fract(v * (0.5f/Pi)) * (2*Pi); + I32 neg = x > Pi; + x = if_then_else(neg, x - Pi, x); + + F pair = x * (Pi - x); + x = 4.0f * pair / ((5*Pi*Pi/4) - pair); + x = if_then_else(neg, -x, x); + return x; +} + +SI F cos_(F v) { + return sin_(v + (SK_ScalarPI/2)); +} + +/* "GENERATING ACCURATE VALUES FOR THE TANGENT FUNCTION" + https://mae.ufl.edu/~uhk/ACCURATE-TANGENT.pdf + + approx = x + (1/3)x^3 + (2/15)x^5 + (17/315)x^7 + (62/2835)x^9 + + Some simplifications: + 1. tan(x) is periodic, -PI/2 < x < PI/2 + 2. tan(x) is odd, so tan(-x) = -tan(x) + 3. Our polynomial approximation is best near zero, so we use the following identity + tan(x) + tan(y) + tan(x + y) = ----------------- + 1 - tan(x)*tan(y) + tan(PI/4) = 1 + + So for x > PI/8, we do the following refactor: + x' = x - PI/4 + + 1 + tan(x') + tan(x) = ------------ + 1 - tan(x') + */ +SI F tan_(F x) { + constexpr float Pi = SK_ScalarPI; + // periodic between -pi/2 ... pi/2 + // shift to 0...Pi, scale 1/Pi to get into 0...1, then fract, scale-up, shift-back + x = fract((1/Pi)*x + 0.5f) * Pi - (Pi/2); + + I32 neg = (x < 0.0f); + x = if_then_else(neg, -x, x); + + // minimize total error by shifting if x > pi/8 + I32 use_quotient = (x > (Pi/8)); + x = if_then_else(use_quotient, x - (Pi/4), x); + + // 9th order poly = 4th order(x^2) * x + const float c4 = 62 / 2835.0f; + const float c3 = 17 / 315.0f; + const float c2 = 2 / 15.0f; + const float c1 = 1 / 3.0f; + const float c0 = 1.0f; + F x2 = x * x; + x *= mad(x2, mad(x2, mad(x2, mad(x2, c4, c3), c2), c1), c0); + x = if_then_else(use_quotient, (1+x)/(1-x), x); + x = if_then_else(neg, -x, x); + return x; +} + +/* Use 4th order polynomial approximation from https://arachnoid.com/polysolve/ + with 129 values of x,atan(x) for x:[0...1] + This only works for 0 <= x <= 1 + */ +SI F approx_atan_unit(F x) { + // y = 0.14130025741326729 x⁴ + // - 0.34312835980675116 x³ + // - 0.016172900528248768 x² + // + 1.00376969762003850 x + // - 0.00014758242182738969 + const float c4 = 0.14130025741326729f; + const float c3 = -0.34312835980675116f; + const float c2 = -0.016172900528248768f; + const float c1 = 1.0037696976200385f; + const float c0 = -0.00014758242182738969f; + return mad(x, mad(x, mad(x, mad(x, c4, c3), c2), c1), c0); +} + +// Use identity atan(x) = pi/2 - atan(1/x) for x > 1 +SI F atan_(F x) { + I32 neg = (x < 0.0f); + x = if_then_else(neg, -x, x); + I32 flip = (x > 1.0f); + x = if_then_else(flip, 1/x, x); + x = approx_atan_unit(x); + x = if_then_else(flip, SK_ScalarPI/2 - x, x); + x = if_then_else(neg, -x, x); + return x; +} + +// Handbook of Mathematical Functions, by Milton Abramowitz and Irene Stegun: +// https://books.google.com/books/content?id=ZboM5tOFWtsC&pg=PA81&img=1&zoom=3&hl=en&bul=1&sig=ACfU3U2M75tG_iGVOS92eQspr14LTq02Nw&ci=0%2C15%2C999%2C1279&edge=0 +// http://screen/8YGJxUGFQ49bVX6 +SI F asin_(F x) { + I32 neg = (x < 0.0f); + x = if_then_else(neg, -x, x); + const float c3 = -0.0187293f; + const float c2 = 0.0742610f; + const float c1 = -0.2121144f; + const float c0 = 1.5707288f; + F poly = mad(x, mad(x, mad(x, c3, c2), c1), c0); + x = SK_ScalarPI/2 - sqrt_(1 - x) * poly; + x = if_then_else(neg, -x, x); + return x; +} + +SI F acos_(F x) { + return SK_ScalarPI/2 - asin_(x); +} + +/* Use identity atan(x) = pi/2 - atan(1/x) for x > 1 + By swapping y,x to ensure the ratio is <= 1, we can safely call atan_unit() + which avoids a 2nd divide instruction if we had instead called atan(). + */ +SI F atan2_(F y0, F x0) { + I32 flip = (abs_(y0) > abs_(x0)); + F y = if_then_else(flip, x0, y0); + F x = if_then_else(flip, y0, x0); + F arg = y/x; + + I32 neg = (arg < 0.0f); + arg = if_then_else(neg, -arg, arg); + + F r = approx_atan_unit(arg); + r = if_then_else(flip, SK_ScalarPI/2 - r, r); + r = if_then_else(neg, -r, r); + + // handle quadrant distinctions + r = if_then_else((y0 >= 0) & (x0 < 0), r + SK_ScalarPI, r); + r = if_then_else((y0 < 0) & (x0 <= 0), r - SK_ScalarPI, r); + // Note: we don't try to handle 0,0 or infinities + return r; +} + +// Used by gather_ stages to calculate the base pointer and a vector of indices to load. +template +SI U32 ix_and_ptr(T** ptr, const SkRasterPipeline_GatherCtx* ctx, F x, F y) { + // We use exclusive clamp so that our min value is > 0 because ULP subtraction using U32 would + // produce a NaN if applied to +0.f. + x = clamp_ex(x, ctx->width ); + y = clamp_ex(y, ctx->height); + x = sk_bit_cast(sk_bit_cast(x) - (uint32_t)ctx->roundDownAtInteger); + y = sk_bit_cast(sk_bit_cast(y) - (uint32_t)ctx->roundDownAtInteger); + *ptr = (const T*)ctx->pixels; + return trunc_(y)*ctx->stride + trunc_(x); +} + +// We often have a nominally [0,1] float value we need to scale and convert to an integer, +// whether for a table lookup or to pack back down into bytes for storage. +// +// In practice, especially when dealing with interesting color spaces, that notionally +// [0,1] float may be out of [0,1] range. Unorms cannot represent that, so we must clamp. +// +// You can adjust the expected input to [0,bias] by tweaking that parameter. +SI U32 to_unorm(F v, F scale, F bias = 1.0f) { + // Any time we use round() we probably want to use to_unorm(). + return round(min(max(0.0f, v), bias), scale); +} + +SI I32 cond_to_mask(I32 cond) { +#if defined(JUMPER_IS_SCALAR) + // In scalar mode, conditions are bools (0 or 1), but we want to store and operate on masks + // (eg, using bitwise operations to select values). + return if_then_else(cond, I32(~0), I32(0)); +#else + // In SIMD mode, our various instruction sets already represent conditions as masks. + return cond; +#endif +} + +SI I32 cond_to_mask(U32 cond) { + return cond_to_mask(sk_bit_cast(cond)); +} + +// Now finally, normal Stages! + +STAGE(seed_shader, NoCtx) { + static constexpr float iota[] = { + 0.5f, 1.5f, 2.5f, 3.5f, 4.5f, 5.5f, 6.5f, 7.5f, + 8.5f, 9.5f,10.5f,11.5f,12.5f,13.5f,14.5f,15.5f, + }; + // It's important for speed to explicitly cast(dx) and cast(dy), + // which has the effect of splatting them to vectors before converting to floats. + // On Intel this breaks a data dependency on previous loop iterations' registers. + r = cast(dx) + sk_unaligned_load(iota); + g = cast(dy) + 0.5f; + b = 1.0f; // This is w=1 for matrix multiplies by the device coords. + a = 0; +} + +STAGE(store_device_xy01, F* dst) { + // This is very similar to `seed_shader + store_src`, but b/a are backwards. + // (sk_FragCoord actually puts w=1 in the w slot.) + static constexpr float iota[] = { + 0.5f, 1.5f, 2.5f, 3.5f, 4.5f, 5.5f, 6.5f, 7.5f, + 8.5f, 9.5f,10.5f,11.5f,12.5f,13.5f,14.5f,15.5f, + }; + dst[0] = cast(dx) + sk_unaligned_load(iota); + dst[1] = cast(dy) + 0.5f; + dst[2] = 0.0f; + dst[3] = 1.0f; +} + +STAGE(dither, const float* rate) { + // Get [(dx,dy), (dx+1,dy), (dx+2,dy), ...] loaded up in integer vectors. + uint32_t iota[] = {0,1,2,3,4,5,6,7}; + U32 X = dx + sk_unaligned_load(iota), + Y = dy; + + // We're doing 8x8 ordered dithering, see https://en.wikipedia.org/wiki/Ordered_dithering. + // In this case n=8 and we're using the matrix that looks like 1/64 x [ 0 48 12 60 ... ]. + + // We only need X and X^Y from here on, so it's easier to just think of that as "Y". + Y ^= X; + + // We'll mix the bottom 3 bits of each of X and Y to make 6 bits, + // for 2^6 == 64 == 8x8 matrix values. If X=abc and Y=def, we make fcebda. + U32 M = (Y & 1) << 5 | (X & 1) << 4 + | (Y & 2) << 2 | (X & 2) << 1 + | (Y & 4) >> 1 | (X & 4) >> 2; + + // Scale that dither to [0,1), then (-0.5,+0.5), here using 63/128 = 0.4921875 as 0.5-epsilon. + // We want to make sure our dither is less than 0.5 in either direction to keep exact values + // like 0 and 1 unchanged after rounding. + F dither = cast(M) * (2/128.0f) - (63/128.0f); + + r += *rate*dither; + g += *rate*dither; + b += *rate*dither; + + r = max(0.0f, min(r, a)); + g = max(0.0f, min(g, a)); + b = max(0.0f, min(b, a)); +} + +// load 4 floats from memory, and splat them into r,g,b,a +STAGE(uniform_color, const SkRasterPipeline_UniformColorCtx* c) { + r = c->r; + g = c->g; + b = c->b; + a = c->a; +} +STAGE(unbounded_uniform_color, const SkRasterPipeline_UniformColorCtx* c) { + r = c->r; + g = c->g; + b = c->b; + a = c->a; +} +// load 4 floats from memory, and splat them into dr,dg,db,da +STAGE(uniform_color_dst, const SkRasterPipeline_UniformColorCtx* c) { + dr = c->r; + dg = c->g; + db = c->b; + da = c->a; +} + +// splats opaque-black into r,g,b,a +STAGE(black_color, NoCtx) { + r = g = b = 0.0f; + a = 1.0f; +} + +STAGE(white_color, NoCtx) { + r = g = b = a = 1.0f; +} + +// load registers r,g,b,a from context (mirrors store_src) +STAGE(load_src, const float* ptr) { + r = sk_unaligned_load(ptr + 0*N); + g = sk_unaligned_load(ptr + 1*N); + b = sk_unaligned_load(ptr + 2*N); + a = sk_unaligned_load(ptr + 3*N); +} + +// store registers r,g,b,a into context (mirrors load_src) +STAGE(store_src, float* ptr) { + sk_unaligned_store(ptr + 0*N, r); + sk_unaligned_store(ptr + 1*N, g); + sk_unaligned_store(ptr + 2*N, b); + sk_unaligned_store(ptr + 3*N, a); +} +// store registers r,g into context +STAGE(store_src_rg, float* ptr) { + sk_unaligned_store(ptr + 0*N, r); + sk_unaligned_store(ptr + 1*N, g); +} +// load registers r,g from context +STAGE(load_src_rg, float* ptr) { + r = sk_unaligned_load(ptr + 0*N); + g = sk_unaligned_load(ptr + 1*N); +} +// store register a into context +STAGE(store_src_a, float* ptr) { + sk_unaligned_store(ptr, a); +} + +// load registers dr,dg,db,da from context (mirrors store_dst) +STAGE(load_dst, const float* ptr) { + dr = sk_unaligned_load(ptr + 0*N); + dg = sk_unaligned_load(ptr + 1*N); + db = sk_unaligned_load(ptr + 2*N); + da = sk_unaligned_load(ptr + 3*N); +} + +// store registers dr,dg,db,da into context (mirrors load_dst) +STAGE(store_dst, float* ptr) { + sk_unaligned_store(ptr + 0*N, dr); + sk_unaligned_store(ptr + 1*N, dg); + sk_unaligned_store(ptr + 2*N, db); + sk_unaligned_store(ptr + 3*N, da); +} + +// Most blend modes apply the same logic to each channel. +#define BLEND_MODE(name) \ + SI F name##_channel(F s, F d, F sa, F da); \ + STAGE(name, NoCtx) { \ + r = name##_channel(r,dr,a,da); \ + g = name##_channel(g,dg,a,da); \ + b = name##_channel(b,db,a,da); \ + a = name##_channel(a,da,a,da); \ + } \ + SI F name##_channel(F s, F d, F sa, F da) + +SI F inv(F x) { return 1.0f - x; } +SI F two(F x) { return x + x; } + + +BLEND_MODE(clear) { return 0; } +BLEND_MODE(srcatop) { return s*da + d*inv(sa); } +BLEND_MODE(dstatop) { return d*sa + s*inv(da); } +BLEND_MODE(srcin) { return s * da; } +BLEND_MODE(dstin) { return d * sa; } +BLEND_MODE(srcout) { return s * inv(da); } +BLEND_MODE(dstout) { return d * inv(sa); } +BLEND_MODE(srcover) { return mad(d, inv(sa), s); } +BLEND_MODE(dstover) { return mad(s, inv(da), d); } + +BLEND_MODE(modulate) { return s*d; } +BLEND_MODE(multiply) { return s*inv(da) + d*inv(sa) + s*d; } +BLEND_MODE(plus_) { return min(s + d, 1.0f); } // We can clamp to either 1 or sa. +BLEND_MODE(screen) { return s + d - s*d; } +BLEND_MODE(xor_) { return s*inv(da) + d*inv(sa); } +#undef BLEND_MODE + +// Most other blend modes apply the same logic to colors, and srcover to alpha. +#define BLEND_MODE(name) \ + SI F name##_channel(F s, F d, F sa, F da); \ + STAGE(name, NoCtx) { \ + r = name##_channel(r,dr,a,da); \ + g = name##_channel(g,dg,a,da); \ + b = name##_channel(b,db,a,da); \ + a = mad(da, inv(a), a); \ + } \ + SI F name##_channel(F s, F d, F sa, F da) + +BLEND_MODE(darken) { return s + d - max(s*da, d*sa) ; } +BLEND_MODE(lighten) { return s + d - min(s*da, d*sa) ; } +BLEND_MODE(difference) { return s + d - two(min(s*da, d*sa)); } +BLEND_MODE(exclusion) { return s + d - two(s*d); } + +BLEND_MODE(colorburn) { + return if_then_else(d == da, d + s*inv(da), + if_then_else(s == 0, /* s + */ d*inv(sa), + sa*(da - min(da, (da-d)*sa*rcp_fast(s))) + s*inv(da) + d*inv(sa))); +} +BLEND_MODE(colordodge) { + return if_then_else(d == 0, /* d + */ s*inv(da), + if_then_else(s == sa, s + d*inv(sa), + sa*min(da, (d*sa)*rcp_fast(sa - s)) + s*inv(da) + d*inv(sa))); +} +BLEND_MODE(hardlight) { + return s*inv(da) + d*inv(sa) + + if_then_else(two(s) <= sa, two(s*d), sa*da - two((da-d)*(sa-s))); +} +BLEND_MODE(overlay) { + return s*inv(da) + d*inv(sa) + + if_then_else(two(d) <= da, two(s*d), sa*da - two((da-d)*(sa-s))); +} + +BLEND_MODE(softlight) { + F m = if_then_else(da > 0, d / da, F(0)), + s2 = two(s), + m4 = two(two(m)); + + // The logic forks three ways: + // 1. dark src? + // 2. light src, dark dst? + // 3. light src, light dst? + F darkSrc = d*(sa + (s2 - sa)*(1.0f - m)), // Used in case 1. + darkDst = (m4*m4 + m4)*(m - 1.0f) + 7.0f*m, // Used in case 2. + liteDst = sqrt_(m) - m, + liteSrc = d*sa + da*(s2 - sa) * if_then_else(two(two(d)) <= da, darkDst, liteDst); // 2 or 3? + return s*inv(da) + d*inv(sa) + if_then_else(s2 <= sa, darkSrc, liteSrc); // 1 or (2 or 3)? +} +#undef BLEND_MODE + +// We're basing our implemenation of non-separable blend modes on +// https://www.w3.org/TR/compositing-1/#blendingnonseparable. +// and +// https://www.khronos.org/registry/OpenGL/specs/es/3.2/es_spec_3.2.pdf +// They're equivalent, but ES' math has been better simplified. +// +// Anything extra we add beyond that is to make the math work with premul inputs. + +SI F sat(F r, F g, F b) { return max(r, max(g,b)) - min(r, min(g,b)); } + +#if defined(SK_USE_LEGACY_RP_LUMINANCE) +SI F lum(F r, F g, F b) { return r*0.30f + g*0.59f + b*0.11f; } +#else +SI F lum(F r, F g, F b) { return mad(r, 0.30f, mad(g, 0.59f, b*0.11f)); } +#endif + +SI void set_sat(F* r, F* g, F* b, F s) { + F mn = min(*r, min(*g,*b)), + mx = max(*r, max(*g,*b)), + sat = mx - mn; + + // Map min channel to 0, max channel to s, and scale the middle proportionally. + auto scale = [=](F c) { + return if_then_else(sat == 0, F(0), (c - mn) * s / sat); + }; + *r = scale(*r); + *g = scale(*g); + *b = scale(*b); +} +SI void set_lum(F* r, F* g, F* b, F l) { + F diff = l - lum(*r, *g, *b); + *r += diff; + *g += diff; + *b += diff; +} +SI void clip_color(F* r, F* g, F* b, F a) { + F mn = min(*r, min(*g, *b)), + mx = max(*r, max(*g, *b)), + l = lum(*r, *g, *b); + + auto clip = [=](F c) { + c = if_then_else(mn < 0 && l != mn, l + (c - l) * ( l) / (l - mn), c); + c = if_then_else(mx > a && l != mx, l + (c - l) * (a - l) / (mx - l), c); + c = max(c, 0.0f); // Sometimes without this we may dip just a little negative. + return c; + }; + *r = clip(*r); + *g = clip(*g); + *b = clip(*b); +} + +STAGE(hue, NoCtx) { + F R = r*a, + G = g*a, + B = b*a; + + set_sat(&R, &G, &B, sat(dr,dg,db)*a); + set_lum(&R, &G, &B, lum(dr,dg,db)*a); + clip_color(&R,&G,&B, a*da); + + r = r*inv(da) + dr*inv(a) + R; + g = g*inv(da) + dg*inv(a) + G; + b = b*inv(da) + db*inv(a) + B; + a = a + da - a*da; +} +STAGE(saturation, NoCtx) { + F R = dr*a, + G = dg*a, + B = db*a; + + set_sat(&R, &G, &B, sat( r, g, b)*da); + set_lum(&R, &G, &B, lum(dr,dg,db)* a); // (This is not redundant.) + clip_color(&R,&G,&B, a*da); + + r = r*inv(da) + dr*inv(a) + R; + g = g*inv(da) + dg*inv(a) + G; + b = b*inv(da) + db*inv(a) + B; + a = a + da - a*da; +} +STAGE(color, NoCtx) { + F R = r*da, + G = g*da, + B = b*da; + + set_lum(&R, &G, &B, lum(dr,dg,db)*a); + clip_color(&R,&G,&B, a*da); + + r = r*inv(da) + dr*inv(a) + R; + g = g*inv(da) + dg*inv(a) + G; + b = b*inv(da) + db*inv(a) + B; + a = a + da - a*da; +} +STAGE(luminosity, NoCtx) { + F R = dr*a, + G = dg*a, + B = db*a; + + set_lum(&R, &G, &B, lum(r,g,b)*da); + clip_color(&R,&G,&B, a*da); + + r = r*inv(da) + dr*inv(a) + R; + g = g*inv(da) + dg*inv(a) + G; + b = b*inv(da) + db*inv(a) + B; + a = a + da - a*da; +} + +STAGE(srcover_rgba_8888, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U32 dst = load(ptr, tail); + dr = cast((dst ) & 0xff); + dg = cast((dst >> 8) & 0xff); + db = cast((dst >> 16) & 0xff); + da = cast((dst >> 24) ); + // {dr,dg,db,da} are in [0,255] + // { r, g, b, a} are in [0, 1] (but may be out of gamut) + + r = mad(dr, inv(a), r*255.0f); + g = mad(dg, inv(a), g*255.0f); + b = mad(db, inv(a), b*255.0f); + a = mad(da, inv(a), a*255.0f); + // { r, g, b, a} are now in [0,255] (but may be out of gamut) + + // to_unorm() clamps back to gamut. Scaling by 1 since we're already 255-biased. + dst = to_unorm(r, 1, 255) + | to_unorm(g, 1, 255) << 8 + | to_unorm(b, 1, 255) << 16 + | to_unorm(a, 1, 255) << 24; + store(ptr, dst, tail); +} + +SI F clamp_01_(F v) { return min(max(0.0f, v), 1.0f); } + +STAGE(clamp_01, NoCtx) { + r = clamp_01_(r); + g = clamp_01_(g); + b = clamp_01_(b); + a = clamp_01_(a); +} + +STAGE(clamp_gamut, NoCtx) { + a = min(max(a, 0.0f), 1.0f); + r = min(max(r, 0.0f), a); + g = min(max(g, 0.0f), a); + b = min(max(b, 0.0f), a); +} + +STAGE(set_rgb, const float* rgb) { + r = rgb[0]; + g = rgb[1]; + b = rgb[2]; +} + +STAGE(unbounded_set_rgb, const float* rgb) { + r = rgb[0]; + g = rgb[1]; + b = rgb[2]; +} + +STAGE(swap_rb, NoCtx) { + auto tmp = r; + r = b; + b = tmp; +} +STAGE(swap_rb_dst, NoCtx) { + auto tmp = dr; + dr = db; + db = tmp; +} + +STAGE(move_src_dst, NoCtx) { + dr = r; + dg = g; + db = b; + da = a; +} +STAGE(move_dst_src, NoCtx) { + r = dr; + g = dg; + b = db; + a = da; +} +STAGE(swap_src_dst, NoCtx) { + std::swap(r, dr); + std::swap(g, dg); + std::swap(b, db); + std::swap(a, da); +} + +STAGE(premul, NoCtx) { + r = r * a; + g = g * a; + b = b * a; +} +STAGE(premul_dst, NoCtx) { + dr = dr * da; + dg = dg * da; + db = db * da; +} +STAGE(unpremul, NoCtx) { + float inf = sk_bit_cast(0x7f800000); + auto scale = if_then_else(1.0f/a < inf, 1.0f/a, F(0)); + r *= scale; + g *= scale; + b *= scale; +} +STAGE(unpremul_polar, NoCtx) { + float inf = sk_bit_cast(0x7f800000); + auto scale = if_then_else(1.0f/a < inf, 1.0f/a, F(0)); + g *= scale; + b *= scale; +} + +STAGE(force_opaque , NoCtx) { a = 1; } +STAGE(force_opaque_dst, NoCtx) { da = 1; } + +STAGE(rgb_to_hsl, NoCtx) { + F mx = max(r, max(g,b)), + mn = min(r, min(g,b)), + d = mx - mn, + d_rcp = 1.0f / d; + + F h = (1/6.0f) * + if_then_else(mx == mn, F(0), + if_then_else(mx == r, (g-b)*d_rcp + if_then_else(g < b, F(6.0f), F(0)), + if_then_else(mx == g, (b-r)*d_rcp + 2.0f, + (r-g)*d_rcp + 4.0f))); + + F l = (mx + mn) * 0.5f; + F s = if_then_else(mx == mn, F(0), + d / if_then_else(l > 0.5f, 2.0f-mx-mn, mx+mn)); + + r = h; + g = s; + b = l; +} +STAGE(hsl_to_rgb, NoCtx) { + // See GrRGBToHSLFilterEffect.fp + + F h = r, + s = g, + l = b, + c = (1.0f - abs_(2.0f * l - 1)) * s; + + auto hue_to_rgb = [&](F hue) { + F q = clamp_01_(abs_(fract(hue) * 6.0f - 3.0f) - 1.0f); + return (q - 0.5f) * c + l; + }; + + r = hue_to_rgb(h + 0.0f/3.0f); + g = hue_to_rgb(h + 2.0f/3.0f); + b = hue_to_rgb(h + 1.0f/3.0f); +} + +// Color conversion functions used in gradient interpolation, based on +// https://www.w3.org/TR/css-color-4/#color-conversion-code +STAGE(css_lab_to_xyz, NoCtx) { + constexpr float k = 24389 / 27.0f; + constexpr float e = 216 / 24389.0f; + + F f[3]; + f[1] = (r + 16) * (1 / 116.0f); + f[0] = (g * (1 / 500.0f)) + f[1]; + f[2] = f[1] - (b * (1 / 200.0f)); + + F f_cubed[3] = { f[0]*f[0]*f[0], f[1]*f[1]*f[1], f[2]*f[2]*f[2] }; + + F xyz[3] = { + if_then_else(f_cubed[0] > e, f_cubed[0], (116 * f[0] - 16) * (1 / k)), + if_then_else(r > k * e, f_cubed[1], r * (1 / k)), + if_then_else(f_cubed[2] > e, f_cubed[2], (116 * f[2] - 16) * (1 / k)) + }; + + constexpr float D50[3] = { 0.3457f / 0.3585f, 1.0f, (1.0f - 0.3457f - 0.3585f) / 0.3585f }; + r = xyz[0]*D50[0]; + g = xyz[1]*D50[1]; + b = xyz[2]*D50[2]; +} + +STAGE(css_oklab_to_linear_srgb, NoCtx) { + F l_ = r + 0.3963377774f * g + 0.2158037573f * b, + m_ = r - 0.1055613458f * g - 0.0638541728f * b, + s_ = r - 0.0894841775f * g - 1.2914855480f * b; + + F l = l_*l_*l_, + m = m_*m_*m_, + s = s_*s_*s_; + + r = +4.0767416621f * l - 3.3077115913f * m + 0.2309699292f * s; + g = -1.2684380046f * l + 2.6097574011f * m - 0.3413193965f * s; + b = -0.0041960863f * l - 0.7034186147f * m + 1.7076147010f * s; +} + +// Skia stores all polar colors with hue in the first component, so this "LCH -> Lab" transform +// actually takes "HCL". This is also used to do the same polar transform for OkHCL to OkLAB. +// See similar comments & logic in SkGradientShaderBase.cpp. +STAGE(css_hcl_to_lab, NoCtx) { + F H = r, + C = g, + L = b; + + F hueRadians = H * (SK_FloatPI / 180); + + r = L; + g = C * cos_(hueRadians); + b = C * sin_(hueRadians); +} + +SI F mod_(F x, float y) { + return x - y * floor_(x * (1 / y)); +} + +struct RGB { F r, g, b; }; + +SI RGB css_hsl_to_srgb_(F h, F s, F l) { + h = mod_(h, 360); + + s *= 0.01f; + l *= 0.01f; + + F k[3] = { + mod_(0 + h * (1 / 30.0f), 12), + mod_(8 + h * (1 / 30.0f), 12), + mod_(4 + h * (1 / 30.0f), 12) + }; + F a = s * min(l, 1 - l); + return { + l - a * max(-1.0f, min(min(k[0] - 3.0f, 9.0f - k[0]), 1.0f)), + l - a * max(-1.0f, min(min(k[1] - 3.0f, 9.0f - k[1]), 1.0f)), + l - a * max(-1.0f, min(min(k[2] - 3.0f, 9.0f - k[2]), 1.0f)) + }; +} + +STAGE(css_hsl_to_srgb, NoCtx) { + RGB rgb = css_hsl_to_srgb_(r, g, b); + r = rgb.r; + g = rgb.g; + b = rgb.b; +} + +STAGE(css_hwb_to_srgb, NoCtx) { + g *= 0.01f; + b *= 0.01f; + + F gray = g / (g + b); + + RGB rgb = css_hsl_to_srgb_(r, 100.0f, 50.0f); + rgb.r = rgb.r * (1 - g - b) + g; + rgb.g = rgb.g * (1 - g - b) + g; + rgb.b = rgb.b * (1 - g - b) + g; + + auto isGray = (g + b) >= 1; + + r = if_then_else(isGray, gray, rgb.r); + g = if_then_else(isGray, gray, rgb.g); + b = if_then_else(isGray, gray, rgb.b); +} + +// Derive alpha's coverage from rgb coverage and the values of src and dst alpha. +SI F alpha_coverage_from_rgb_coverage(F a, F da, F cr, F cg, F cb) { + return if_then_else(a < da, min(cr, min(cg,cb)) + , max(cr, max(cg,cb))); +} + +STAGE(scale_1_float, const float* c) { + r = r * *c; + g = g * *c; + b = b * *c; + a = a * *c; +} +STAGE(scale_u8, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + auto scales = load(ptr, tail); + auto c = from_byte(scales); + + r = r * c; + g = g * c; + b = b * c; + a = a * c; +} +STAGE(scale_565, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + F cr,cg,cb; + from_565(load(ptr, tail), &cr, &cg, &cb); + + F ca = alpha_coverage_from_rgb_coverage(a,da, cr,cg,cb); + + r = r * cr; + g = g * cg; + b = b * cb; + a = a * ca; +} + +SI F lerp(F from, F to, F t) { + return mad(to-from, t, from); +} + +STAGE(lerp_1_float, const float* c) { + r = lerp(dr, r, *c); + g = lerp(dg, g, *c); + b = lerp(db, b, *c); + a = lerp(da, a, *c); +} +STAGE(scale_native, const float scales[]) { + auto c = sk_unaligned_load(scales); + r = r * c; + g = g * c; + b = b * c; + a = a * c; +} +STAGE(lerp_native, const float scales[]) { + auto c = sk_unaligned_load(scales); + r = lerp(dr, r, c); + g = lerp(dg, g, c); + b = lerp(db, b, c); + a = lerp(da, a, c); +} +STAGE(lerp_u8, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + auto scales = load(ptr, tail); + auto c = from_byte(scales); + + r = lerp(dr, r, c); + g = lerp(dg, g, c); + b = lerp(db, b, c); + a = lerp(da, a, c); +} +STAGE(lerp_565, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + F cr,cg,cb; + from_565(load(ptr, tail), &cr, &cg, &cb); + + F ca = alpha_coverage_from_rgb_coverage(a,da, cr,cg,cb); + + r = lerp(dr, r, cr); + g = lerp(dg, g, cg); + b = lerp(db, b, cb); + a = lerp(da, a, ca); +} + +STAGE(emboss, const SkRasterPipeline_EmbossCtx* ctx) { + auto mptr = ptr_at_xy(&ctx->mul, dx,dy), + aptr = ptr_at_xy(&ctx->add, dx,dy); + + F mul = from_byte(load(mptr, tail)), + add = from_byte(load(aptr, tail)); + + r = mad(r, mul, add); + g = mad(g, mul, add); + b = mad(b, mul, add); +} + +STAGE(byte_tables, const SkRasterPipeline_TablesCtx* tables) { + r = from_byte(gather(tables->r, to_unorm(r, 255))); + g = from_byte(gather(tables->g, to_unorm(g, 255))); + b = from_byte(gather(tables->b, to_unorm(b, 255))); + a = from_byte(gather(tables->a, to_unorm(a, 255))); +} + +SI F strip_sign(F x, U32* sign) { + U32 bits = sk_bit_cast(x); + *sign = bits & 0x80000000; + return sk_bit_cast(bits ^ *sign); +} + +SI F apply_sign(F x, U32 sign) { + return sk_bit_cast(sign | sk_bit_cast(x)); +} + +STAGE(parametric, const skcms_TransferFunction* ctx) { + auto fn = [&](F v) { + U32 sign; + v = strip_sign(v, &sign); + + F r = if_then_else(v <= ctx->d, mad(ctx->c, v, ctx->f) + , approx_powf(mad(ctx->a, v, ctx->b), ctx->g) + ctx->e); + return apply_sign(r, sign); + }; + r = fn(r); + g = fn(g); + b = fn(b); +} + +STAGE(gamma_, const float* G) { + auto fn = [&](F v) { + U32 sign; + v = strip_sign(v, &sign); + return apply_sign(approx_powf(v, *G), sign); + }; + r = fn(r); + g = fn(g); + b = fn(b); +} + +STAGE(PQish, const skcms_TransferFunction* ctx) { + auto fn = [&](F v) { + U32 sign; + v = strip_sign(v, &sign); + + F r = approx_powf(max(mad(ctx->b, approx_powf(v, ctx->c), ctx->a), 0.0f) + / (mad(ctx->e, approx_powf(v, ctx->c), ctx->d)), + ctx->f); + + return apply_sign(r, sign); + }; + r = fn(r); + g = fn(g); + b = fn(b); +} + +STAGE(HLGish, const skcms_TransferFunction* ctx) { + auto fn = [&](F v) { + U32 sign; + v = strip_sign(v, &sign); + + const float R = ctx->a, G = ctx->b, + a = ctx->c, b = ctx->d, c = ctx->e, + K = ctx->f + 1.0f; + + F r = if_then_else(v*R <= 1, approx_powf(v*R, G) + , approx_exp((v-c)*a) + b); + + return K * apply_sign(r, sign); + }; + r = fn(r); + g = fn(g); + b = fn(b); +} + +STAGE(HLGinvish, const skcms_TransferFunction* ctx) { + auto fn = [&](F v) { + U32 sign; + v = strip_sign(v, &sign); + + const float R = ctx->a, G = ctx->b, + a = ctx->c, b = ctx->d, c = ctx->e, + K = ctx->f + 1.0f; + + v /= K; + F r = if_then_else(v <= 1, R * approx_powf(v, G) + , a * approx_log(v - b) + c); + + return apply_sign(r, sign); + }; + r = fn(r); + g = fn(g); + b = fn(b); +} + +STAGE(load_a8, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + r = g = b = 0.0f; + a = from_byte(load(ptr, tail)); +} +STAGE(load_a8_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + dr = dg = db = 0.0f; + da = from_byte(load(ptr, tail)); +} +STAGE(gather_a8, const SkRasterPipeline_GatherCtx* ctx) { + const uint8_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r,g); + r = g = b = 0.0f; + a = from_byte(gather(ptr, ix)); +} +STAGE(store_a8, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U8 packed = pack(pack(to_unorm(a, 255))); + store(ptr, packed, tail); +} +STAGE(store_r8, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U8 packed = pack(pack(to_unorm(r, 255))); + store(ptr, packed, tail); +} + +STAGE(load_565, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + from_565(load(ptr, tail), &r,&g,&b); + a = 1.0f; +} +STAGE(load_565_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + from_565(load(ptr, tail), &dr,&dg,&db); + da = 1.0f; +} +STAGE(gather_565, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r,g); + from_565(gather(ptr, ix), &r,&g,&b); + a = 1.0f; +} +STAGE(store_565, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U16 px = pack( to_unorm(r, 31) << 11 + | to_unorm(g, 63) << 5 + | to_unorm(b, 31) ); + store(ptr, px, tail); +} + +STAGE(load_4444, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_4444(load(ptr, tail), &r,&g,&b,&a); +} +STAGE(load_4444_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_4444(load(ptr, tail), &dr,&dg,&db,&da); +} +STAGE(gather_4444, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r,g); + from_4444(gather(ptr, ix), &r,&g,&b,&a); +} +STAGE(store_4444, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + U16 px = pack( to_unorm(r, 15) << 12 + | to_unorm(g, 15) << 8 + | to_unorm(b, 15) << 4 + | to_unorm(a, 15) ); + store(ptr, px, tail); +} + +STAGE(load_8888, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_8888(load(ptr, tail), &r,&g,&b,&a); +} +STAGE(load_8888_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_8888(load(ptr, tail), &dr,&dg,&db,&da); +} +STAGE(gather_8888, const SkRasterPipeline_GatherCtx* ctx) { + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r,g); + from_8888(gather(ptr, ix), &r,&g,&b,&a); +} +STAGE(store_8888, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U32 px = to_unorm(r, 255) + | to_unorm(g, 255) << 8 + | to_unorm(b, 255) << 16 + | to_unorm(a, 255) << 24; + store(ptr, px, tail); +} + +STAGE(load_rg88, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + from_88(load(ptr, tail), &r, &g); + b = 0; + a = 1; +} +STAGE(load_rg88_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + from_88(load(ptr, tail), &dr, &dg); + db = 0; + da = 1; +} +STAGE(gather_rg88, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r, g); + from_88(gather(ptr, ix), &r, &g); + b = 0; + a = 1; +} +STAGE(store_rg88, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + U16 px = pack( to_unorm(r, 255) | to_unorm(g, 255) << 8 ); + store(ptr, px, tail); +} + +STAGE(load_a16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + r = g = b = 0; + a = from_short(load(ptr, tail)); +} +STAGE(load_a16_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + dr = dg = db = 0.0f; + da = from_short(load(ptr, tail)); +} +STAGE(gather_a16, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r, g); + r = g = b = 0.0f; + a = from_short(gather(ptr, ix)); +} +STAGE(store_a16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U16 px = pack(to_unorm(a, 65535)); + store(ptr, px, tail); +} + +STAGE(load_rg1616, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + b = 0; a = 1; + from_1616(load(ptr, tail), &r,&g); +} +STAGE(load_rg1616_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + from_1616(load(ptr, tail), &dr, &dg); + db = 0; + da = 1; +} +STAGE(gather_rg1616, const SkRasterPipeline_GatherCtx* ctx) { + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r, g); + from_1616(gather(ptr, ix), &r, &g); + b = 0; + a = 1; +} +STAGE(store_rg1616, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U32 px = to_unorm(r, 65535) + | to_unorm(g, 65535) << 16; + store(ptr, px, tail); +} + +STAGE(load_16161616, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + from_16161616(load(ptr, tail), &r,&g, &b, &a); +} +STAGE(load_16161616_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + from_16161616(load(ptr, tail), &dr, &dg, &db, &da); +} +STAGE(gather_16161616, const SkRasterPipeline_GatherCtx* ctx) { + const uint64_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r, g); + from_16161616(gather(ptr, ix), &r, &g, &b, &a); +} +STAGE(store_16161616, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, 4*dx,4*dy); + + U16 R = pack(to_unorm(r, 65535)), + G = pack(to_unorm(g, 65535)), + B = pack(to_unorm(b, 65535)), + A = pack(to_unorm(a, 65535)); + + store4(ptr,tail, R,G,B,A); +} + + +STAGE(load_1010102, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_1010102(load(ptr, tail), &r,&g,&b,&a); +} +STAGE(load_1010102_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_1010102(load(ptr, tail), &dr,&dg,&db,&da); +} +STAGE(load_1010102_xr, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_1010102_xr(load(ptr, tail), &r,&g,&b,&a); +} +STAGE(load_1010102_xr_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + from_1010102_xr(load(ptr, tail), &dr,&dg,&db,&da); +} +STAGE(gather_1010102, const SkRasterPipeline_GatherCtx* ctx) { + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r,g); + from_1010102(gather(ptr, ix), &r,&g,&b,&a); +} +STAGE(store_1010102, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U32 px = to_unorm(r, 1023) + | to_unorm(g, 1023) << 10 + | to_unorm(b, 1023) << 20 + | to_unorm(a, 3) << 30; + store(ptr, px, tail); +} +STAGE(store_1010102_xr, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + static constexpr float min = -0.752941f; + static constexpr float max = 1.25098f; + static constexpr float range = max - min; + U32 px = to_unorm((r - min) / range, 1023) + | to_unorm((g - min) / range, 1023) << 10 + | to_unorm((b - min) / range, 1023) << 20 + | to_unorm(a, 3) << 30; + store(ptr, px, tail); +} + +STAGE(load_f16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U16 R,G,B,A; + load4((const uint16_t*)ptr,tail, &R,&G,&B,&A); + r = from_half(R); + g = from_half(G); + b = from_half(B); + a = from_half(A); +} +STAGE(load_f16_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U16 R,G,B,A; + load4((const uint16_t*)ptr,tail, &R,&G,&B,&A); + dr = from_half(R); + dg = from_half(G); + db = from_half(B); + da = from_half(A); +} +STAGE(gather_f16, const SkRasterPipeline_GatherCtx* ctx) { + const uint64_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r,g); + auto px = gather(ptr, ix); + + U16 R,G,B,A; + load4((const uint16_t*)&px,0, &R,&G,&B,&A); + r = from_half(R); + g = from_half(G); + b = from_half(B); + a = from_half(A); +} +STAGE(store_f16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + store4((uint16_t*)ptr,tail, to_half(r) + , to_half(g) + , to_half(b) + , to_half(a)); +} + +STAGE(store_u16_be, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, 4*dx,dy); + + U16 R = bswap(pack(to_unorm(r, 65535))), + G = bswap(pack(to_unorm(g, 65535))), + B = bswap(pack(to_unorm(b, 65535))), + A = bswap(pack(to_unorm(a, 65535))); + + store4(ptr,tail, R,G,B,A); +} + +STAGE(load_af16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + U16 A = load((const uint16_t*)ptr, tail); + r = 0; + g = 0; + b = 0; + a = from_half(A); +} +STAGE(load_af16_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + + U16 A = load((const uint16_t*)ptr, tail); + dr = dg = db = 0.0f; + da = from_half(A); +} +STAGE(gather_af16, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r, g); + r = g = b = 0.0f; + a = from_half(gather(ptr, ix)); +} +STAGE(store_af16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + store(ptr, to_half(a), tail); +} + +STAGE(load_rgf16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + + U16 R,G; + load2((const uint16_t*)ptr, tail, &R, &G); + r = from_half(R); + g = from_half(G); + b = 0; + a = 1; +} +STAGE(load_rgf16_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + + U16 R,G; + load2((const uint16_t*)ptr, tail, &R, &G); + dr = from_half(R); + dg = from_half(G); + db = 0; + da = 1; +} +STAGE(gather_rgf16, const SkRasterPipeline_GatherCtx* ctx) { + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r, g); + auto px = gather(ptr, ix); + + U16 R,G; + load2((const uint16_t*)&px, 0, &R, &G); + r = from_half(R); + g = from_half(G); + b = 0; + a = 1; +} +STAGE(store_rgf16, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx, dy); + store2((uint16_t*)ptr, tail, to_half(r) + , to_half(g)); +} + +STAGE(load_f32, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, 4*dx,4*dy); + load4(ptr,tail, &r,&g,&b,&a); +} +STAGE(load_f32_dst, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, 4*dx,4*dy); + load4(ptr,tail, &dr,&dg,&db,&da); +} +STAGE(gather_f32, const SkRasterPipeline_GatherCtx* ctx) { + const float* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, r,g); + r = gather(ptr, 4*ix + 0); + g = gather(ptr, 4*ix + 1); + b = gather(ptr, 4*ix + 2); + a = gather(ptr, 4*ix + 3); +} +STAGE(store_f32, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, 4*dx,4*dy); + store4(ptr,tail, r,g,b,a); +} + +STAGE(load_rgf32, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, 2*dx,2*dy); + load2(ptr, tail, &r, &g); + b = 0; + a = 1; +} +STAGE(store_rgf32, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, 2*dx,2*dy); + store2(ptr, tail, r, g); +} + +SI F exclusive_repeat(F v, const SkRasterPipeline_TileCtx* ctx) { + return v - floor_(v*ctx->invScale)*ctx->scale; +} +SI F exclusive_mirror(F v, const SkRasterPipeline_TileCtx* ctx) { + auto limit = ctx->scale; + auto invLimit = ctx->invScale; + + // This is "repeat" over the range 0..2*limit + auto u = v - floor_(v*invLimit*0.5f)*2*limit; + // s will be 0 when moving forward (e.g. [0, limit)) and 1 when moving backward (e.g. + // [limit, 2*limit)). + auto s = floor_(u*invLimit); + // This is the mirror result. + auto m = u - 2*s*(u - limit); + // Apply a bias to m if moving backwards so that we snap consistently at exact integer coords in + // the logical infinite image. This is tested by mirror_tile GM. Note that all values + // that have a non-zero bias applied are > 0. + auto biasInUlps = trunc_(s); + return sk_bit_cast(sk_bit_cast(m) + ctx->mirrorBiasDir*biasInUlps); +} +// Tile x or y to [0,limit) == [0,limit - 1 ulp] (think, sampling from images). +// The gather stages will hard clamp the output of these stages to [0,limit)... +// we just need to do the basic repeat or mirroring. +STAGE(repeat_x, const SkRasterPipeline_TileCtx* ctx) { r = exclusive_repeat(r, ctx); } +STAGE(repeat_y, const SkRasterPipeline_TileCtx* ctx) { g = exclusive_repeat(g, ctx); } +STAGE(mirror_x, const SkRasterPipeline_TileCtx* ctx) { r = exclusive_mirror(r, ctx); } +STAGE(mirror_y, const SkRasterPipeline_TileCtx* ctx) { g = exclusive_mirror(g, ctx); } + +STAGE( clamp_x_1, NoCtx) { r = clamp_01_(r); } +STAGE(repeat_x_1, NoCtx) { r = clamp_01_(r - floor_(r)); } +STAGE(mirror_x_1, NoCtx) { r = clamp_01_(abs_( (r-1.0f) - two(floor_((r-1.0f)*0.5f)) - 1.0f )); } + +STAGE(clamp_x_and_y, const SkRasterPipeline_CoordClampCtx* ctx) { + r = min(ctx->max_x, max(ctx->min_x, r)); + g = min(ctx->max_y, max(ctx->min_y, g)); +} + +// Decal stores a 32bit mask after checking the coordinate (x and/or y) against its domain: +// mask == 0x00000000 if the coordinate(s) are out of bounds +// mask == 0xFFFFFFFF if the coordinate(s) are in bounds +// After the gather stage, the r,g,b,a values are AND'd with this mask, setting them to 0 +// if either of the coordinates were out of bounds. + +STAGE(decal_x, SkRasterPipeline_DecalTileCtx* ctx) { + auto w = ctx->limit_x; + auto e = ctx->inclusiveEdge_x; + auto cond = ((0 < r) & (r < w)) | (r == e); + sk_unaligned_store(ctx->mask, cond_to_mask(cond)); +} +STAGE(decal_y, SkRasterPipeline_DecalTileCtx* ctx) { + auto h = ctx->limit_y; + auto e = ctx->inclusiveEdge_y; + auto cond = ((0 < g) & (g < h)) | (g == e); + sk_unaligned_store(ctx->mask, cond_to_mask(cond)); +} +STAGE(decal_x_and_y, SkRasterPipeline_DecalTileCtx* ctx) { + auto w = ctx->limit_x; + auto h = ctx->limit_y; + auto ex = ctx->inclusiveEdge_x; + auto ey = ctx->inclusiveEdge_y; + auto cond = (((0 < r) & (r < w)) | (r == ex)) + & (((0 < g) & (g < h)) | (g == ey)); + sk_unaligned_store(ctx->mask, cond_to_mask(cond)); +} +STAGE(check_decal_mask, SkRasterPipeline_DecalTileCtx* ctx) { + auto mask = sk_unaligned_load(ctx->mask); + r = sk_bit_cast(sk_bit_cast(r) & mask); + g = sk_bit_cast(sk_bit_cast(g) & mask); + b = sk_bit_cast(sk_bit_cast(b) & mask); + a = sk_bit_cast(sk_bit_cast(a) & mask); +} + +STAGE(alpha_to_gray, NoCtx) { + r = g = b = a; + a = 1; +} +STAGE(alpha_to_gray_dst, NoCtx) { + dr = dg = db = da; + da = 1; +} +STAGE(alpha_to_red, NoCtx) { + r = a; + a = 1; +} +STAGE(alpha_to_red_dst, NoCtx) { + dr = da; + da = 1; +} + +STAGE(bt709_luminance_or_luma_to_alpha, NoCtx) { + a = r*0.2126f + g*0.7152f + b*0.0722f; + r = g = b = 0; +} +STAGE(bt709_luminance_or_luma_to_rgb, NoCtx) { + r = g = b = r*0.2126f + g*0.7152f + b*0.0722f; +} + +STAGE(matrix_translate, const float* m) { + r += m[0]; + g += m[1]; +} +STAGE(matrix_scale_translate, const float* m) { + r = mad(r,m[0], m[2]); + g = mad(g,m[1], m[3]); +} +STAGE(matrix_2x3, const float* m) { + auto R = mad(r,m[0], mad(g,m[1], m[2])), + G = mad(r,m[3], mad(g,m[4], m[5])); + r = R; + g = G; +} +STAGE(matrix_3x3, const float* m) { + auto R = mad(r,m[0], mad(g,m[3], b*m[6])), + G = mad(r,m[1], mad(g,m[4], b*m[7])), + B = mad(r,m[2], mad(g,m[5], b*m[8])); + r = R; + g = G; + b = B; +} +STAGE(matrix_3x4, const float* m) { + auto R = mad(r,m[0], mad(g,m[3], mad(b,m[6], m[ 9]))), + G = mad(r,m[1], mad(g,m[4], mad(b,m[7], m[10]))), + B = mad(r,m[2], mad(g,m[5], mad(b,m[8], m[11]))); + r = R; + g = G; + b = B; +} +STAGE(matrix_4x5, const float* m) { + auto R = mad(r,m[ 0], mad(g,m[ 1], mad(b,m[ 2], mad(a,m[ 3], m[ 4])))), + G = mad(r,m[ 5], mad(g,m[ 6], mad(b,m[ 7], mad(a,m[ 8], m[ 9])))), + B = mad(r,m[10], mad(g,m[11], mad(b,m[12], mad(a,m[13], m[14])))), + A = mad(r,m[15], mad(g,m[16], mad(b,m[17], mad(a,m[18], m[19])))); + r = R; + g = G; + b = B; + a = A; +} +STAGE(matrix_4x3, const float* m) { + auto X = r, + Y = g; + + r = mad(X, m[0], mad(Y, m[4], m[ 8])); + g = mad(X, m[1], mad(Y, m[5], m[ 9])); + b = mad(X, m[2], mad(Y, m[6], m[10])); + a = mad(X, m[3], mad(Y, m[7], m[11])); +} +STAGE(matrix_perspective, const float* m) { + // N.B. Unlike the other matrix_ stages, this matrix is row-major. + auto R = mad(r,m[0], mad(g,m[1], m[2])), + G = mad(r,m[3], mad(g,m[4], m[5])), + Z = mad(r,m[6], mad(g,m[7], m[8])); + r = R * rcp_precise(Z); + g = G * rcp_precise(Z); +} + +SI void gradient_lookup(const SkRasterPipeline_GradientCtx* c, U32 idx, F t, + F* r, F* g, F* b, F* a) { + F fr, br, fg, bg, fb, bb, fa, ba; +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + if (c->stopCount <=8) { + fr = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[0]), idx); + br = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[0]), idx); + fg = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[1]), idx); + bg = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[1]), idx); + fb = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[2]), idx); + bb = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[2]), idx); + fa = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[3]), idx); + ba = _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[3]), idx); + } else +#endif + { + fr = gather(c->fs[0], idx); + br = gather(c->bs[0], idx); + fg = gather(c->fs[1], idx); + bg = gather(c->bs[1], idx); + fb = gather(c->fs[2], idx); + bb = gather(c->bs[2], idx); + fa = gather(c->fs[3], idx); + ba = gather(c->bs[3], idx); + } + + *r = mad(t, fr, br); + *g = mad(t, fg, bg); + *b = mad(t, fb, bb); + *a = mad(t, fa, ba); +} + +STAGE(evenly_spaced_gradient, const SkRasterPipeline_GradientCtx* c) { + auto t = r; + auto idx = trunc_(t * (c->stopCount-1)); + gradient_lookup(c, idx, t, &r, &g, &b, &a); +} + +STAGE(gradient, const SkRasterPipeline_GradientCtx* c) { + auto t = r; + U32 idx = 0; + + // N.B. The loop starts at 1 because idx 0 is the color to use before the first stop. + for (size_t i = 1; i < c->stopCount; i++) { + idx += if_then_else(t >= c->ts[i], U32(1), U32(0)); + } + + gradient_lookup(c, idx, t, &r, &g, &b, &a); +} + +STAGE(evenly_spaced_2_stop_gradient, const SkRasterPipeline_EvenlySpaced2StopGradientCtx* c) { + auto t = r; + r = mad(t, c->f[0], c->b[0]); + g = mad(t, c->f[1], c->b[1]); + b = mad(t, c->f[2], c->b[2]); + a = mad(t, c->f[3], c->b[3]); +} + +STAGE(xy_to_unit_angle, NoCtx) { + F X = r, + Y = g; + F xabs = abs_(X), + yabs = abs_(Y); + + F slope = min(xabs, yabs)/max(xabs, yabs); + F s = slope * slope; + + // Use a 7th degree polynomial to approximate atan. + // This was generated using sollya.gforge.inria.fr. + // A float optimized polynomial was generated using the following command. + // P1 = fpminimax((1/(2*Pi))*atan(x),[|1,3,5,7|],[|24...|],[2^(-40),1],relative); + F phi = slope + * (0.15912117063999176025390625f + s + * (-5.185396969318389892578125e-2f + s + * (2.476101927459239959716796875e-2f + s + * (-7.0547382347285747528076171875e-3f)))); + + phi = if_then_else(xabs < yabs, 1.0f/4.0f - phi, phi); + phi = if_then_else(X < 0.0f , 1.0f/2.0f - phi, phi); + phi = if_then_else(Y < 0.0f , 1.0f - phi , phi); + phi = if_then_else(phi != phi , F(0) , phi); // Check for NaN. + r = phi; +} + +STAGE(xy_to_radius, NoCtx) { + F X2 = r * r, + Y2 = g * g; + r = sqrt_(X2 + Y2); +} + +// Please see https://skia.org/dev/design/conical for how our 2pt conical shader works. + +STAGE(negate_x, NoCtx) { r = -r; } + +STAGE(xy_to_2pt_conical_strip, const SkRasterPipeline_2PtConicalCtx* ctx) { + F x = r, y = g, &t = r; + t = x + sqrt_(ctx->fP0 - y*y); // ctx->fP0 = r0 * r0 +} + +STAGE(xy_to_2pt_conical_focal_on_circle, NoCtx) { + F x = r, y = g, &t = r; + t = x + y*y / x; // (x^2 + y^2) / x +} + +STAGE(xy_to_2pt_conical_well_behaved, const SkRasterPipeline_2PtConicalCtx* ctx) { + F x = r, y = g, &t = r; + t = sqrt_(x*x + y*y) - x * ctx->fP0; // ctx->fP0 = 1/r1 +} + +STAGE(xy_to_2pt_conical_greater, const SkRasterPipeline_2PtConicalCtx* ctx) { + F x = r, y = g, &t = r; + t = sqrt_(x*x - y*y) - x * ctx->fP0; // ctx->fP0 = 1/r1 +} + +STAGE(xy_to_2pt_conical_smaller, const SkRasterPipeline_2PtConicalCtx* ctx) { + F x = r, y = g, &t = r; + t = -sqrt_(x*x - y*y) - x * ctx->fP0; // ctx->fP0 = 1/r1 +} + +STAGE(alter_2pt_conical_compensate_focal, const SkRasterPipeline_2PtConicalCtx* ctx) { + F& t = r; + t = t + ctx->fP1; // ctx->fP1 = f +} + +STAGE(alter_2pt_conical_unswap, NoCtx) { + F& t = r; + t = 1 - t; +} + +STAGE(mask_2pt_conical_nan, SkRasterPipeline_2PtConicalCtx* c) { + F& t = r; + auto is_degenerate = (t != t); // NaN + t = if_then_else(is_degenerate, F(0), t); + sk_unaligned_store(&c->fMask, cond_to_mask(!is_degenerate)); +} + +STAGE(mask_2pt_conical_degenerates, SkRasterPipeline_2PtConicalCtx* c) { + F& t = r; + auto is_degenerate = (t <= 0) | (t != t); + t = if_then_else(is_degenerate, F(0), t); + sk_unaligned_store(&c->fMask, cond_to_mask(!is_degenerate)); +} + +STAGE(apply_vector_mask, const uint32_t* ctx) { + const U32 mask = sk_unaligned_load(ctx); + r = sk_bit_cast(sk_bit_cast(r) & mask); + g = sk_bit_cast(sk_bit_cast(g) & mask); + b = sk_bit_cast(sk_bit_cast(b) & mask); + a = sk_bit_cast(sk_bit_cast(a) & mask); +} + +SI void save_xy(F* r, F* g, SkRasterPipeline_SamplerCtx* c) { + // Whether bilinear or bicubic, all sample points are at the same fractional offset (fx,fy). + // They're either the 4 corners of a logical 1x1 pixel or the 16 corners of a 3x3 grid + // surrounding (x,y) at (0.5,0.5) off-center. + F fx = fract(*r + 0.5f), + fy = fract(*g + 0.5f); + + // Samplers will need to load x and fx, or y and fy. + sk_unaligned_store(c->x, *r); + sk_unaligned_store(c->y, *g); + sk_unaligned_store(c->fx, fx); + sk_unaligned_store(c->fy, fy); +} + +STAGE(accumulate, const SkRasterPipeline_SamplerCtx* c) { + // Bilinear and bicubic filters are both separable, so we produce independent contributions + // from x and y, multiplying them together here to get each pixel's total scale factor. + auto scale = sk_unaligned_load(c->scalex) + * sk_unaligned_load(c->scaley); + dr = mad(scale, r, dr); + dg = mad(scale, g, dg); + db = mad(scale, b, db); + da = mad(scale, a, da); +} + +// In bilinear interpolation, the 4 pixels at +/- 0.5 offsets from the sample pixel center +// are combined in direct proportion to their area overlapping that logical query pixel. +// At positive offsets, the x-axis contribution to that rectangle is fx, or (1-fx) at negative x. +// The y-axis is symmetric. + +template +SI void bilinear_x(SkRasterPipeline_SamplerCtx* ctx, F* x) { + *x = sk_unaligned_load(ctx->x) + (kScale * 0.5f); + F fx = sk_unaligned_load(ctx->fx); + + F scalex; + if (kScale == -1) { scalex = 1.0f - fx; } + if (kScale == +1) { scalex = fx; } + sk_unaligned_store(ctx->scalex, scalex); +} +template +SI void bilinear_y(SkRasterPipeline_SamplerCtx* ctx, F* y) { + *y = sk_unaligned_load(ctx->y) + (kScale * 0.5f); + F fy = sk_unaligned_load(ctx->fy); + + F scaley; + if (kScale == -1) { scaley = 1.0f - fy; } + if (kScale == +1) { scaley = fy; } + sk_unaligned_store(ctx->scaley, scaley); +} + +STAGE(bilinear_setup, SkRasterPipeline_SamplerCtx* ctx) { + save_xy(&r, &g, ctx); + // Init for accumulate + dr = dg = db = da = 0; +} + +STAGE(bilinear_nx, SkRasterPipeline_SamplerCtx* ctx) { bilinear_x<-1>(ctx, &r); } +STAGE(bilinear_px, SkRasterPipeline_SamplerCtx* ctx) { bilinear_x<+1>(ctx, &r); } +STAGE(bilinear_ny, SkRasterPipeline_SamplerCtx* ctx) { bilinear_y<-1>(ctx, &g); } +STAGE(bilinear_py, SkRasterPipeline_SamplerCtx* ctx) { bilinear_y<+1>(ctx, &g); } + + +// In bicubic interpolation, the 16 pixels and +/- 0.5 and +/- 1.5 offsets from the sample +// pixel center are combined with a non-uniform cubic filter, with higher values near the center. +// +// This helper computes the total weight along one axis (our bicubic filter is separable), given one +// column of the sampling matrix, and a fractional pixel offset. See SkCubicResampler for details. + +SI F bicubic_wts(F t, float A, float B, float C, float D) { + return mad(t, mad(t, mad(t, D, C), B), A); +} + +template +SI void bicubic_x(SkRasterPipeline_SamplerCtx* ctx, F* x) { + *x = sk_unaligned_load(ctx->x) + (kScale * 0.5f); + + F scalex; + if (kScale == -3) { scalex = sk_unaligned_load(ctx->wx[0]); } + if (kScale == -1) { scalex = sk_unaligned_load(ctx->wx[1]); } + if (kScale == +1) { scalex = sk_unaligned_load(ctx->wx[2]); } + if (kScale == +3) { scalex = sk_unaligned_load(ctx->wx[3]); } + sk_unaligned_store(ctx->scalex, scalex); +} +template +SI void bicubic_y(SkRasterPipeline_SamplerCtx* ctx, F* y) { + *y = sk_unaligned_load(ctx->y) + (kScale * 0.5f); + + F scaley; + if (kScale == -3) { scaley = sk_unaligned_load(ctx->wy[0]); } + if (kScale == -1) { scaley = sk_unaligned_load(ctx->wy[1]); } + if (kScale == +1) { scaley = sk_unaligned_load(ctx->wy[2]); } + if (kScale == +3) { scaley = sk_unaligned_load(ctx->wy[3]); } + sk_unaligned_store(ctx->scaley, scaley); +} + +STAGE(bicubic_setup, SkRasterPipeline_SamplerCtx* ctx) { + save_xy(&r, &g, ctx); + + const float* w = ctx->weights; + + F fx = sk_unaligned_load(ctx->fx); + sk_unaligned_store(ctx->wx[0], bicubic_wts(fx, w[0], w[4], w[ 8], w[12])); + sk_unaligned_store(ctx->wx[1], bicubic_wts(fx, w[1], w[5], w[ 9], w[13])); + sk_unaligned_store(ctx->wx[2], bicubic_wts(fx, w[2], w[6], w[10], w[14])); + sk_unaligned_store(ctx->wx[3], bicubic_wts(fx, w[3], w[7], w[11], w[15])); + + F fy = sk_unaligned_load(ctx->fy); + sk_unaligned_store(ctx->wy[0], bicubic_wts(fy, w[0], w[4], w[ 8], w[12])); + sk_unaligned_store(ctx->wy[1], bicubic_wts(fy, w[1], w[5], w[ 9], w[13])); + sk_unaligned_store(ctx->wy[2], bicubic_wts(fy, w[2], w[6], w[10], w[14])); + sk_unaligned_store(ctx->wy[3], bicubic_wts(fy, w[3], w[7], w[11], w[15])); + + // Init for accumulate + dr = dg = db = da = 0; +} + +STAGE(bicubic_n3x, SkRasterPipeline_SamplerCtx* ctx) { bicubic_x<-3>(ctx, &r); } +STAGE(bicubic_n1x, SkRasterPipeline_SamplerCtx* ctx) { bicubic_x<-1>(ctx, &r); } +STAGE(bicubic_p1x, SkRasterPipeline_SamplerCtx* ctx) { bicubic_x<+1>(ctx, &r); } +STAGE(bicubic_p3x, SkRasterPipeline_SamplerCtx* ctx) { bicubic_x<+3>(ctx, &r); } + +STAGE(bicubic_n3y, SkRasterPipeline_SamplerCtx* ctx) { bicubic_y<-3>(ctx, &g); } +STAGE(bicubic_n1y, SkRasterPipeline_SamplerCtx* ctx) { bicubic_y<-1>(ctx, &g); } +STAGE(bicubic_p1y, SkRasterPipeline_SamplerCtx* ctx) { bicubic_y<+1>(ctx, &g); } +STAGE(bicubic_p3y, SkRasterPipeline_SamplerCtx* ctx) { bicubic_y<+3>(ctx, &g); } + +STAGE(mipmap_linear_init, SkRasterPipeline_MipmapCtx* ctx) { + sk_unaligned_store(ctx->x, r); + sk_unaligned_store(ctx->y, g); +} + +STAGE(mipmap_linear_update, SkRasterPipeline_MipmapCtx* ctx) { + sk_unaligned_store(ctx->r, r); + sk_unaligned_store(ctx->g, g); + sk_unaligned_store(ctx->b, b); + sk_unaligned_store(ctx->a, a); + + r = sk_unaligned_load(ctx->x) * ctx->scaleX; + g = sk_unaligned_load(ctx->y) * ctx->scaleY; +} + +STAGE(mipmap_linear_finish, SkRasterPipeline_MipmapCtx* ctx) { + r = lerp(sk_unaligned_load(ctx->r), r, ctx->lowerWeight); + g = lerp(sk_unaligned_load(ctx->g), g, ctx->lowerWeight); + b = lerp(sk_unaligned_load(ctx->b), b, ctx->lowerWeight); + a = lerp(sk_unaligned_load(ctx->a), a, ctx->lowerWeight); +} + +STAGE(callback, SkRasterPipeline_CallbackCtx* c) { + store4(c->rgba,0, r,g,b,a); + c->fn(c, tail ? tail : N); + load4(c->read_from,0, &r,&g,&b,&a); +} + +// All control flow stages used by SkSL maintain some state in the common registers: +// dr: condition mask +// dg: loop mask +// db: return mask +// da: execution mask (intersection of all three masks) +// After updating dr/dg/db, you must invoke update_execution_mask(). +#define execution_mask() sk_bit_cast(da) +#define update_execution_mask() da = sk_bit_cast(sk_bit_cast(dr) & \ + sk_bit_cast(dg) & \ + sk_bit_cast(db)) + +STAGE_TAIL(init_lane_masks, NoCtx) { + uint32_t iota[] = {0,1,2,3,4,5,6,7}; + I32 mask = tail ? cond_to_mask(sk_unaligned_load(iota) < tail) : I32(~0); + dr = dg = db = da = sk_bit_cast(mask); +} + +STAGE_TAIL(load_condition_mask, F* ctx) { + dr = sk_unaligned_load(ctx); + update_execution_mask(); +} + +STAGE_TAIL(store_condition_mask, F* ctx) { + sk_unaligned_store(ctx, dr); +} + +STAGE_TAIL(merge_condition_mask, I32* ptr) { + // Set the condition-mask to the intersection of two adjacent masks at the pointer. + dr = sk_bit_cast(ptr[0] & ptr[1]); + update_execution_mask(); +} + +STAGE_TAIL(load_loop_mask, F* ctx) { + dg = sk_unaligned_load(ctx); + update_execution_mask(); +} + +STAGE_TAIL(store_loop_mask, F* ctx) { + sk_unaligned_store(ctx, dg); +} + +STAGE_TAIL(mask_off_loop_mask, NoCtx) { + // We encountered a break statement. If a lane was active, it should be masked off now, and stay + // masked-off until the termination of the loop. + dg = sk_bit_cast(sk_bit_cast(dg) & ~execution_mask()); + update_execution_mask(); +} + +STAGE_TAIL(reenable_loop_mask, I32* ptr) { + // Set the loop-mask to the union of the current loop-mask with the mask at the pointer. + dg = sk_bit_cast(sk_bit_cast(dg) | ptr[0]); + update_execution_mask(); +} + +STAGE_TAIL(merge_loop_mask, I32* ptr) { + // Set the loop-mask to the intersection of the current loop-mask with the mask at the pointer. + // (Note: this behavior subtly differs from merge_condition_mask!) + dg = sk_bit_cast(sk_bit_cast(dg) & ptr[0]); + update_execution_mask(); +} + +STAGE_TAIL(case_op, SkRasterPipeline_CaseOpCtx* ctx) { + // Check each lane to see if the case value matches the expectation. + I32* actualValue = (I32*)ctx->ptr; + I32 caseMatches = cond_to_mask(*actualValue == ctx->expectedValue); + + // In lanes where we found a match, enable the loop mask... + dg = sk_bit_cast(sk_bit_cast(dg) | caseMatches); + update_execution_mask(); + + // ... and clear the default-case mask. + I32* defaultMask = actualValue + 1; + *defaultMask &= ~caseMatches; +} + +STAGE_TAIL(load_return_mask, F* ctx) { + db = sk_unaligned_load(ctx); + update_execution_mask(); +} + +STAGE_TAIL(store_return_mask, F* ctx) { + sk_unaligned_store(ctx, db); +} + +STAGE_TAIL(mask_off_return_mask, NoCtx) { + // We encountered a return statement. If a lane was active, it should be masked off now, and + // stay masked-off until the end of the function. + db = sk_bit_cast(sk_bit_cast(db) & ~execution_mask()); + update_execution_mask(); +} + +STAGE_BRANCH(branch_if_all_lanes_active, SkRasterPipeline_BranchCtx* ctx) { + if (tail) { + uint32_t iota[] = {0,1,2,3,4,5,6,7}; + I32 tailLanes = cond_to_mask(tail <= sk_unaligned_load(iota)); + return all(execution_mask() | tailLanes) ? ctx->offset : 1; + } else { + return all(execution_mask()) ? ctx->offset : 1; + } +} + +STAGE_BRANCH(branch_if_any_lanes_active, SkRasterPipeline_BranchCtx* ctx) { + return any(execution_mask()) ? ctx->offset : 1; +} + +STAGE_BRANCH(branch_if_no_lanes_active, SkRasterPipeline_BranchCtx* ctx) { + return any(execution_mask()) ? 1 : ctx->offset; +} + +STAGE_BRANCH(jump, SkRasterPipeline_BranchCtx* ctx) { + return ctx->offset; +} + +STAGE_BRANCH(branch_if_no_active_lanes_eq, SkRasterPipeline_BranchIfEqualCtx* ctx) { + // Compare each lane against the expected value... + I32 match = cond_to_mask(*(I32*)ctx->ptr == ctx->value); + // ... but mask off lanes that aren't executing. + match &= execution_mask(); + // If any lanes matched, don't take the branch. + return any(match) ? 1 : ctx->offset; +} + +STAGE_TAIL(zero_slot_unmasked, F* dst) { + // We don't even bother masking off the tail; we're filling slots, not the destination surface. + sk_bzero(dst, sizeof(F) * 1); +} +STAGE_TAIL(zero_2_slots_unmasked, F* dst) { + sk_bzero(dst, sizeof(F) * 2); +} +STAGE_TAIL(zero_3_slots_unmasked, F* dst) { + sk_bzero(dst, sizeof(F) * 3); +} +STAGE_TAIL(zero_4_slots_unmasked, F* dst) { + sk_bzero(dst, sizeof(F) * 4); +} + +STAGE_TAIL(copy_constant, SkRasterPipeline_BinaryOpCtx* ctx) { + const float* src = ctx->src; + F* dst = (F*)ctx->dst; + dst[0] = src[0]; +} +STAGE_TAIL(copy_2_constants, SkRasterPipeline_BinaryOpCtx* ctx) { + const float* src = ctx->src; + F* dst = (F*)ctx->dst; + dst[0] = src[0]; + dst[1] = src[1]; +} +STAGE_TAIL(copy_3_constants, SkRasterPipeline_BinaryOpCtx* ctx) { + const float* src = ctx->src; + F* dst = (F*)ctx->dst; + dst[0] = src[0]; + dst[1] = src[1]; + dst[2] = src[2]; +} +STAGE_TAIL(copy_4_constants, SkRasterPipeline_BinaryOpCtx* ctx) { + const float* src = ctx->src; + F* dst = (F*)ctx->dst; + dst[0] = src[0]; + dst[1] = src[1]; + dst[2] = src[2]; + dst[3] = src[3]; +} + +STAGE_TAIL(copy_slot_unmasked, SkRasterPipeline_BinaryOpCtx* ctx) { + // We don't even bother masking off the tail; we're filling slots, not the destination surface. + memcpy(ctx->dst, ctx->src, sizeof(F) * 1); +} +STAGE_TAIL(copy_2_slots_unmasked, SkRasterPipeline_BinaryOpCtx* ctx) { + memcpy(ctx->dst, ctx->src, sizeof(F) * 2); +} +STAGE_TAIL(copy_3_slots_unmasked, SkRasterPipeline_BinaryOpCtx* ctx) { + memcpy(ctx->dst, ctx->src, sizeof(F) * 3); +} +STAGE_TAIL(copy_4_slots_unmasked, SkRasterPipeline_BinaryOpCtx* ctx) { + memcpy(ctx->dst, ctx->src, sizeof(F) * 4); +} + +template +SI void copy_n_slots_masked_fn(SkRasterPipeline_BinaryOpCtx* ctx, I32 mask) { + if (any(mask)) { + // Get pointers to our slots. + F* dst = (F*)ctx->dst; + F* src = (F*)ctx->src; + + // Mask off and copy slots. + for (int count = 0; count < NumSlots; ++count) { + *dst = if_then_else(mask, *src, *dst); + dst += 1; + src += 1; + } + } +} + +STAGE_TAIL(copy_slot_masked, SkRasterPipeline_BinaryOpCtx* ctx) { + copy_n_slots_masked_fn<1>(ctx, execution_mask()); +} +STAGE_TAIL(copy_2_slots_masked, SkRasterPipeline_BinaryOpCtx* ctx) { + copy_n_slots_masked_fn<2>(ctx, execution_mask()); +} +STAGE_TAIL(copy_3_slots_masked, SkRasterPipeline_BinaryOpCtx* ctx) { + copy_n_slots_masked_fn<3>(ctx, execution_mask()); +} +STAGE_TAIL(copy_4_slots_masked, SkRasterPipeline_BinaryOpCtx* ctx) { + copy_n_slots_masked_fn<4>(ctx, execution_mask()); +} + +template +SI void shuffle_fn(F* dst, uint16_t* offsets, int numSlots) { + F scratch[16]; + std::byte* src = (std::byte*)dst; + for (int count = 0; count < LoopCount; ++count) { + scratch[count] = *(F*)(src + offsets[count]); + } + // Surprisingly, this switch generates significantly better code than a memcpy (on x86-64) when + // the number of slots is unknown at compile time, and generates roughly identical code when the + // number of slots is hardcoded. Using a switch allows `scratch` to live in ymm0-ymm15 instead + // of being written out to the stack and then read back in. Also, the intrinsic memcpy assumes + // that `numSlots` could be arbitrarily large, and so it emits more code than we need. + switch (numSlots) { + case 16: dst[15] = scratch[15]; [[fallthrough]]; + case 15: dst[14] = scratch[14]; [[fallthrough]]; + case 14: dst[13] = scratch[13]; [[fallthrough]]; + case 13: dst[12] = scratch[12]; [[fallthrough]]; + case 12: dst[11] = scratch[11]; [[fallthrough]]; + case 11: dst[10] = scratch[10]; [[fallthrough]]; + case 10: dst[ 9] = scratch[ 9]; [[fallthrough]]; + case 9: dst[ 8] = scratch[ 8]; [[fallthrough]]; + case 8: dst[ 7] = scratch[ 7]; [[fallthrough]]; + case 7: dst[ 6] = scratch[ 6]; [[fallthrough]]; + case 6: dst[ 5] = scratch[ 5]; [[fallthrough]]; + case 5: dst[ 4] = scratch[ 4]; [[fallthrough]]; + case 4: dst[ 3] = scratch[ 3]; [[fallthrough]]; + case 3: dst[ 2] = scratch[ 2]; [[fallthrough]]; + case 2: dst[ 1] = scratch[ 1]; [[fallthrough]]; + case 1: dst[ 0] = scratch[ 0]; + } +} + +STAGE_TAIL(swizzle_1, SkRasterPipeline_SwizzleCtx* ctx) { + shuffle_fn<1>((F*)ctx->ptr, ctx->offsets, 1); +} +STAGE_TAIL(swizzle_2, SkRasterPipeline_SwizzleCtx* ctx) { + shuffle_fn<2>((F*)ctx->ptr, ctx->offsets, 2); +} +STAGE_TAIL(swizzle_3, SkRasterPipeline_SwizzleCtx* ctx) { + shuffle_fn<3>((F*)ctx->ptr, ctx->offsets, 3); +} +STAGE_TAIL(swizzle_4, SkRasterPipeline_SwizzleCtx* ctx) { + shuffle_fn<4>((F*)ctx->ptr, ctx->offsets, 4); +} +STAGE_TAIL(shuffle, SkRasterPipeline_ShuffleCtx* ctx) { + shuffle_fn<16>((F*)ctx->ptr, ctx->offsets, ctx->count); +} + +template +SI void swizzle_copy_masked_fn(F* dst, const F* src, uint16_t* offsets, I32 mask) { + std::byte* dstB = (std::byte*)dst; + for (int count = 0; count < NumSlots; ++count) { + F* dstS = (F*)(dstB + *offsets); + *dstS = if_then_else(mask, *src, *dstS); + offsets += 1; + src += 1; + } +} + +STAGE_TAIL(swizzle_copy_slot_masked, SkRasterPipeline_SwizzleCopyCtx* ctx) { + swizzle_copy_masked_fn<1>((F*)ctx->dst, (F*)ctx->src, ctx->offsets, execution_mask()); +} +STAGE_TAIL(swizzle_copy_2_slots_masked, SkRasterPipeline_SwizzleCopyCtx* ctx) { + swizzle_copy_masked_fn<2>((F*)ctx->dst, (F*)ctx->src, ctx->offsets, execution_mask()); +} +STAGE_TAIL(swizzle_copy_3_slots_masked, SkRasterPipeline_SwizzleCopyCtx* ctx) { + swizzle_copy_masked_fn<3>((F*)ctx->dst, (F*)ctx->src, ctx->offsets, execution_mask()); +} +STAGE_TAIL(swizzle_copy_4_slots_masked, SkRasterPipeline_SwizzleCopyCtx* ctx) { + swizzle_copy_masked_fn<4>((F*)ctx->dst, (F*)ctx->src, ctx->offsets, execution_mask()); +} + +STAGE_TAIL(copy_from_indirect_unmasked, SkRasterPipeline_CopyIndirectCtx* ctx) { + // Clamp the indirect offsets to stay within the limit. + U32 offsets = *(U32*)ctx->indirectOffset; + offsets = min(offsets, ctx->indirectLimit); + + // Scale up the offsets to account for the N lanes per value. + offsets *= N; + + // Adjust the offsets forward so that they fetch from the correct lane. + static constexpr uint32_t iota[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; + offsets += sk_unaligned_load(iota); + + // Use gather to perform indirect lookups; write the results into `dst`. + const float* src = ctx->src; + F* dst = (F*)ctx->dst; + F* end = dst + ctx->slots; + do { + *dst = gather(src, offsets); + dst += 1; + src += N; + } while (dst != end); +} + +STAGE_TAIL(copy_from_indirect_uniform_unmasked, SkRasterPipeline_CopyIndirectCtx* ctx) { + // Clamp the indirect offsets to stay within the limit. + U32 offsets = *(U32*)ctx->indirectOffset; + offsets = min(offsets, ctx->indirectLimit); + + // Use gather to perform indirect lookups; write the results into `dst`. + const float* src = ctx->src; + F* dst = (F*)ctx->dst; + F* end = dst + ctx->slots; + do { + *dst = gather(src, offsets); + dst += 1; + src += 1; + } while (dst != end); +} + +STAGE_TAIL(copy_to_indirect_masked, SkRasterPipeline_CopyIndirectCtx* ctx) { + // Clamp the indirect offsets to stay within the limit. + U32 offsets = *(U32*)ctx->indirectOffset; + offsets = min(offsets, ctx->indirectLimit); + + // Scale up the offsets to account for the N lanes per value. + offsets *= N; + + // Adjust the offsets forward so that they store into the correct lane. + static constexpr uint32_t iota[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; + offsets += sk_unaligned_load(iota); + + // Perform indirect, masked writes into `dst`. + const F* src = (F*)ctx->src; + const F* end = src + ctx->slots; + float* dst = ctx->dst; + I32 mask = execution_mask(); + do { + scatter_masked(*src, dst, offsets, mask); + dst += N; + src += 1; + } while (src != end); +} + +STAGE_TAIL(swizzle_copy_to_indirect_masked, SkRasterPipeline_SwizzleCopyIndirectCtx* ctx) { + // Clamp the indirect offsets to stay within the limit. + U32 offsets = *(U32*)ctx->indirectOffset; + offsets = min(offsets, ctx->indirectLimit); + + // Scale up the offsets to account for the N lanes per value. + offsets *= N; + + // Adjust the offsets forward so that they store into the correct lane. + static constexpr uint32_t iota[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}; + offsets += sk_unaligned_load(iota); + + // Perform indirect, masked, swizzled writes into `dst`. + const F* src = (F*)ctx->src; + const F* end = src + ctx->slots; + std::byte* dstB = (std::byte*)ctx->dst; + const uint16_t* swizzle = ctx->offsets; + I32 mask = execution_mask(); + do { + float* dst = (float*)(dstB + *swizzle); + scatter_masked(*src, dst, offsets, mask); + swizzle += 1; + src += 1; + } while (src != end); +} + +// Unary operations take a single input, and overwrite it with their output. +// Unlike binary or ternary operations, we provide variations of 1-4 slots, but don't provide +// an arbitrary-width "n-slot" variation; the Builder can chain together longer sequences manually. +template +SI void apply_adjacent_unary(T* dst, T* end) { + do { + ApplyFn(dst); + dst += 1; + } while (dst != end); +} + +SI void bitwise_not_fn(I32* dst) { + *dst = ~*dst; +} + +#if defined(JUMPER_IS_SCALAR) +template +SI void cast_to_float_from_fn(T* dst) { + *dst = sk_bit_cast((F)*dst); +} +SI void cast_to_int_from_fn(F* dst) { + *dst = sk_bit_cast((I32)*dst); +} +SI void cast_to_uint_from_fn(F* dst) { + *dst = sk_bit_cast((U32)*dst); +} +#else +template +SI void cast_to_float_from_fn(T* dst) { + *dst = sk_bit_cast(SK_CONVERTVECTOR(*dst, F)); +} +SI void cast_to_int_from_fn(F* dst) { + *dst = sk_bit_cast(SK_CONVERTVECTOR(*dst, I32)); +} +SI void cast_to_uint_from_fn(F* dst) { + *dst = sk_bit_cast(SK_CONVERTVECTOR(*dst, U32)); +} +#endif + +template +SI void abs_fn(T* dst) { + *dst = abs_(*dst); +} + +SI void floor_fn(F* dst) { + *dst = floor_(*dst); +} + +SI void ceil_fn(F* dst) { + *dst = ceil_(*dst); +} + +SI void invsqrt_fn(F* dst) { + *dst = rsqrt(*dst); +} + +#define DECLARE_UNARY_FLOAT(name) \ + STAGE_TAIL(name##_float, F* dst) { apply_adjacent_unary(dst, dst + 1); } \ + STAGE_TAIL(name##_2_floats, F* dst) { apply_adjacent_unary(dst, dst + 2); } \ + STAGE_TAIL(name##_3_floats, F* dst) { apply_adjacent_unary(dst, dst + 3); } \ + STAGE_TAIL(name##_4_floats, F* dst) { apply_adjacent_unary(dst, dst + 4); } + +#define DECLARE_UNARY_INT(name) \ + STAGE_TAIL(name##_int, I32* dst) { apply_adjacent_unary(dst, dst + 1); } \ + STAGE_TAIL(name##_2_ints, I32* dst) { apply_adjacent_unary(dst, dst + 2); } \ + STAGE_TAIL(name##_3_ints, I32* dst) { apply_adjacent_unary(dst, dst + 3); } \ + STAGE_TAIL(name##_4_ints, I32* dst) { apply_adjacent_unary(dst, dst + 4); } + +#define DECLARE_UNARY_UINT(name) \ + STAGE_TAIL(name##_uint, U32* dst) { apply_adjacent_unary(dst, dst + 1); } \ + STAGE_TAIL(name##_2_uints, U32* dst) { apply_adjacent_unary(dst, dst + 2); } \ + STAGE_TAIL(name##_3_uints, U32* dst) { apply_adjacent_unary(dst, dst + 3); } \ + STAGE_TAIL(name##_4_uints, U32* dst) { apply_adjacent_unary(dst, dst + 4); } + +DECLARE_UNARY_INT(bitwise_not) +DECLARE_UNARY_INT(cast_to_float_from) DECLARE_UNARY_UINT(cast_to_float_from) +DECLARE_UNARY_FLOAT(cast_to_int_from) +DECLARE_UNARY_FLOAT(cast_to_uint_from) +DECLARE_UNARY_FLOAT(abs) DECLARE_UNARY_INT(abs) +DECLARE_UNARY_FLOAT(floor) +DECLARE_UNARY_FLOAT(ceil) +DECLARE_UNARY_FLOAT(invsqrt) + +#undef DECLARE_UNARY_FLOAT +#undef DECLARE_UNARY_INT +#undef DECLARE_UNARY_UINT + +// For complex unary ops, we only provide a 1-slot version to reduce code bloat. +STAGE_TAIL(sin_float, F* dst) { *dst = sin_(*dst); } +STAGE_TAIL(cos_float, F* dst) { *dst = cos_(*dst); } +STAGE_TAIL(tan_float, F* dst) { *dst = tan_(*dst); } +STAGE_TAIL(asin_float, F* dst) { *dst = asin_(*dst); } +STAGE_TAIL(acos_float, F* dst) { *dst = acos_(*dst); } +STAGE_TAIL(atan_float, F* dst) { *dst = atan_(*dst); } +STAGE_TAIL(sqrt_float, F* dst) { *dst = sqrt_(*dst); } +STAGE_TAIL(exp_float, F* dst) { *dst = approx_exp(*dst); } +STAGE_TAIL(exp2_float, F* dst) { *dst = approx_pow2(*dst); } +STAGE_TAIL(log_float, F* dst) { *dst = approx_log(*dst); } +STAGE_TAIL(log2_float, F* dst) { *dst = approx_log2(*dst); } + +STAGE_TAIL(inverse_mat2, F* dst) { + F a00 = dst[0], a01 = dst[1], + a10 = dst[2], a11 = dst[3]; + F det = mad(a00, a11, -a01 * a10), + invdet = rcp_precise(det); + dst[0] = invdet * a11; + dst[1] = -invdet * a01; + dst[2] = -invdet * a10; + dst[3] = invdet * a00; +} + +STAGE_TAIL(inverse_mat3, F* dst) { + F a00 = dst[0], a01 = dst[1], a02 = dst[2], + a10 = dst[3], a11 = dst[4], a12 = dst[5], + a20 = dst[6], a21 = dst[7], a22 = dst[8]; + F b01 = mad(a22, a11, -a12 * a21), + b11 = mad(a12, a20, -a22 * a10), + b21 = mad(a21, a10, -a11 * a20); + F det = mad(a00, b01, mad(a01, b11, a02 * b21)), + invdet = rcp_precise(det); + dst[0] = invdet * b01; + dst[1] = invdet * mad(a02, a21, -a22 * a01); + dst[2] = invdet * mad(a12, a01, -a02 * a11); + dst[3] = invdet * b11; + dst[4] = invdet * mad(a22, a00, -a02 * a20); + dst[5] = invdet * mad(a02, a10, -a12 * a00); + dst[6] = invdet * b21; + dst[7] = invdet * mad(a01, a20, -a21 * a00); + dst[8] = invdet * mad(a11, a00, -a01 * a10); +} + +STAGE_TAIL(inverse_mat4, F* dst) { + F a00 = dst[0], a01 = dst[1], a02 = dst[2], a03 = dst[3], + a10 = dst[4], a11 = dst[5], a12 = dst[6], a13 = dst[7], + a20 = dst[8], a21 = dst[9], a22 = dst[10], a23 = dst[11], + a30 = dst[12], a31 = dst[13], a32 = dst[14], a33 = dst[15]; + F b00 = mad(a00, a11, -a01 * a10), + b01 = mad(a00, a12, -a02 * a10), + b02 = mad(a00, a13, -a03 * a10), + b03 = mad(a01, a12, -a02 * a11), + b04 = mad(a01, a13, -a03 * a11), + b05 = mad(a02, a13, -a03 * a12), + b06 = mad(a20, a31, -a21 * a30), + b07 = mad(a20, a32, -a22 * a30), + b08 = mad(a20, a33, -a23 * a30), + b09 = mad(a21, a32, -a22 * a31), + b10 = mad(a21, a33, -a23 * a31), + b11 = mad(a22, a33, -a23 * a32), + det = mad(b00, b11, b05 * b06) + mad(b02, b09, b03 * b08) - mad(b01, b10, b04 * b07), + invdet = rcp_precise(det); + b00 *= invdet; + b01 *= invdet; + b02 *= invdet; + b03 *= invdet; + b04 *= invdet; + b05 *= invdet; + b06 *= invdet; + b07 *= invdet; + b08 *= invdet; + b09 *= invdet; + b10 *= invdet; + b11 *= invdet; + dst[0] = mad(a11, b11, a13*b09) - a12*b10; + dst[1] = a02*b10 - mad(a01, b11, a03*b09); + dst[2] = mad(a31, b05, a33*b03) - a32*b04; + dst[3] = a22*b04 - mad(a21, b05, a23*b03); + dst[4] = a12*b08 - mad(a10, b11, a13*b07); + dst[5] = mad(a00, b11, a03*b07) - a02*b08; + dst[6] = a32*b02 - mad(a30, b05, a33*b01); + dst[7] = mad(a20, b05, a23*b01) - a22*b02; + dst[8] = mad(a10, b10, a13*b06) - a11*b08; + dst[9] = a01*b08 - mad(a00, b10, a03*b06); + dst[10] = mad(a30, b04, a33*b00) - a31*b02; + dst[11] = a21*b02 - mad(a20, b04, a23*b00); + dst[12] = a11*b07 - mad(a10, b09, a12*b06); + dst[13] = mad(a00, b09, a02*b06) - a01*b07; + dst[14] = a31*b01 - mad(a30, b03, a32*b00); + dst[15] = mad(a20, b03, a22*b00) - a21*b01; +} + +// Binary operations take two adjacent inputs, and write their output in the first position. +template +SI void apply_adjacent_binary(T* dst, T* src) { + T* end = src; + do { + ApplyFn(dst, src); + dst += 1; + src += 1; + } while (dst != end); +} + +template +SI void add_fn(T* dst, T* src) { + *dst += *src; +} + +template +SI void sub_fn(T* dst, T* src) { + *dst -= *src; +} + +template +SI void mul_fn(T* dst, T* src) { + *dst *= *src; +} + +template +SI void div_fn(T* dst, T* src) { + T divisor = *src; + if constexpr (!std::is_same_v) { + // We will crash if we integer-divide against zero. Convert 0 to ~0 to avoid this. + divisor |= sk_bit_cast(cond_to_mask(divisor == 0)); + } + *dst /= divisor; +} + +SI void bitwise_and_fn(I32* dst, I32* src) { + *dst &= *src; +} + +SI void bitwise_or_fn(I32* dst, I32* src) { + *dst |= *src; +} + +SI void bitwise_xor_fn(I32* dst, I32* src) { + *dst ^= *src; +} + +template +SI void max_fn(T* dst, T* src) { + *dst = max(*dst, *src); +} + +template +SI void min_fn(T* dst, T* src) { + *dst = min(*dst, *src); +} + +template +SI void cmplt_fn(T* dst, T* src) { + static_assert(sizeof(T) == sizeof(I32)); + I32 result = cond_to_mask(*dst < *src); + memcpy(dst, &result, sizeof(I32)); +} + +template +SI void cmple_fn(T* dst, T* src) { + static_assert(sizeof(T) == sizeof(I32)); + I32 result = cond_to_mask(*dst <= *src); + memcpy(dst, &result, sizeof(I32)); +} + +template +SI void cmpeq_fn(T* dst, T* src) { + static_assert(sizeof(T) == sizeof(I32)); + I32 result = cond_to_mask(*dst == *src); + memcpy(dst, &result, sizeof(I32)); +} + +template +SI void cmpne_fn(T* dst, T* src) { + static_assert(sizeof(T) == sizeof(I32)); + I32 result = cond_to_mask(*dst != *src); + memcpy(dst, &result, sizeof(I32)); +} + +SI void atan2_fn(F* dst, F* src) { + *dst = atan2_(*dst, *src); +} + +SI void pow_fn(F* dst, F* src) { + *dst = approx_powf(*dst, *src); +} + +SI void mod_fn(F* dst, F* src) { + *dst = *dst - *src * floor_(*dst / *src); +} + +#define DECLARE_N_WAY_BINARY_FLOAT(name) \ + STAGE_TAIL(name##_n_floats, SkRasterPipeline_BinaryOpCtx* ctx) { \ + apply_adjacent_binary((F*)ctx->dst, (F*)ctx->src); \ + } + +#define DECLARE_BINARY_FLOAT(name) \ + STAGE_TAIL(name##_float, F* dst) { apply_adjacent_binary(dst, dst + 1); } \ + STAGE_TAIL(name##_2_floats, F* dst) { apply_adjacent_binary(dst, dst + 2); } \ + STAGE_TAIL(name##_3_floats, F* dst) { apply_adjacent_binary(dst, dst + 3); } \ + STAGE_TAIL(name##_4_floats, F* dst) { apply_adjacent_binary(dst, dst + 4); } \ + DECLARE_N_WAY_BINARY_FLOAT(name) + +#define DECLARE_N_WAY_BINARY_INT(name) \ + STAGE_TAIL(name##_n_ints, SkRasterPipeline_BinaryOpCtx* ctx) { \ + apply_adjacent_binary((I32*)ctx->dst, (I32*)ctx->src); \ + } + +#define DECLARE_BINARY_INT(name) \ + STAGE_TAIL(name##_int, I32* dst) { apply_adjacent_binary(dst, dst + 1); } \ + STAGE_TAIL(name##_2_ints, I32* dst) { apply_adjacent_binary(dst, dst + 2); } \ + STAGE_TAIL(name##_3_ints, I32* dst) { apply_adjacent_binary(dst, dst + 3); } \ + STAGE_TAIL(name##_4_ints, I32* dst) { apply_adjacent_binary(dst, dst + 4); } \ + DECLARE_N_WAY_BINARY_INT(name) + +#define DECLARE_N_WAY_BINARY_UINT(name) \ + STAGE_TAIL(name##_n_uints, SkRasterPipeline_BinaryOpCtx* ctx) { \ + apply_adjacent_binary((U32*)ctx->dst, (U32*)ctx->src); \ + } + +#define DECLARE_BINARY_UINT(name) \ + STAGE_TAIL(name##_uint, U32* dst) { apply_adjacent_binary(dst, dst + 1); } \ + STAGE_TAIL(name##_2_uints, U32* dst) { apply_adjacent_binary(dst, dst + 2); } \ + STAGE_TAIL(name##_3_uints, U32* dst) { apply_adjacent_binary(dst, dst + 3); } \ + STAGE_TAIL(name##_4_uints, U32* dst) { apply_adjacent_binary(dst, dst + 4); } \ + DECLARE_N_WAY_BINARY_UINT(name) + +// Many ops reuse the int stages when performing uint arithmetic, since they're equivalent on a +// two's-complement machine. (Even multiplication is equivalent in the lower 32 bits.) +DECLARE_BINARY_FLOAT(add) DECLARE_BINARY_INT(add) +DECLARE_BINARY_FLOAT(sub) DECLARE_BINARY_INT(sub) +DECLARE_BINARY_FLOAT(mul) DECLARE_BINARY_INT(mul) +DECLARE_BINARY_FLOAT(div) DECLARE_BINARY_INT(div) DECLARE_BINARY_UINT(div) + DECLARE_BINARY_INT(bitwise_and) + DECLARE_BINARY_INT(bitwise_or) + DECLARE_BINARY_INT(bitwise_xor) +DECLARE_BINARY_FLOAT(mod) +DECLARE_BINARY_FLOAT(min) DECLARE_BINARY_INT(min) DECLARE_BINARY_UINT(min) +DECLARE_BINARY_FLOAT(max) DECLARE_BINARY_INT(max) DECLARE_BINARY_UINT(max) +DECLARE_BINARY_FLOAT(cmplt) DECLARE_BINARY_INT(cmplt) DECLARE_BINARY_UINT(cmplt) +DECLARE_BINARY_FLOAT(cmple) DECLARE_BINARY_INT(cmple) DECLARE_BINARY_UINT(cmple) +DECLARE_BINARY_FLOAT(cmpeq) DECLARE_BINARY_INT(cmpeq) +DECLARE_BINARY_FLOAT(cmpne) DECLARE_BINARY_INT(cmpne) + +// Sufficiently complex ops only provide an N-way version, to avoid code bloat from the dedicated +// 1-4 slot versions. +DECLARE_N_WAY_BINARY_FLOAT(atan2) +DECLARE_N_WAY_BINARY_FLOAT(pow) + +#undef DECLARE_BINARY_FLOAT +#undef DECLARE_BINARY_INT +#undef DECLARE_BINARY_UINT +#undef DECLARE_N_WAY_BINARY_FLOAT +#undef DECLARE_N_WAY_BINARY_INT +#undef DECLARE_N_WAY_BINARY_UINT + +// Dots can be represented with multiply and add ops, but they are so foundational that it's worth +// having dedicated ops. +STAGE_TAIL(dot_2_floats, F* dst) { + dst[0] = mad(dst[0], dst[2], + dst[1] * dst[3]); +} + +STAGE_TAIL(dot_3_floats, F* dst) { + dst[0] = mad(dst[0], dst[3], + mad(dst[1], dst[4], + dst[2] * dst[5])); +} + +STAGE_TAIL(dot_4_floats, F* dst) { + dst[0] = mad(dst[0], dst[4], + mad(dst[1], dst[5], + mad(dst[2], dst[6], + dst[3] * dst[7]))); +} + +// Refract always operates on 4-wide incident and normal vectors; for narrower inputs, the code +// generator fills in the input columns with zero, and discards the extra output columns. +STAGE_TAIL(refract_4_floats, F* dst) { + // Algorithm adapted from https://registry.khronos.org/OpenGL-Refpages/gl4/html/refract.xhtml + F *incident = dst + 0; + F *normal = dst + 4; + F eta = dst[8]; + + F dotNI = mad(normal[0], incident[0], + mad(normal[1], incident[1], + mad(normal[2], incident[2], + normal[3] * incident[3]))); + + F k = 1.0 - eta * eta * (1.0 - dotNI * dotNI); + F sqrt_k = sqrt_(k); + + for (int idx = 0; idx < 4; ++idx) { + dst[idx] = if_then_else(k >= 0, + eta * incident[idx] - (eta * dotNI + sqrt_k) * normal[idx], + F(0)); + } +} + +// Ternary operations work like binary ops (see immediately above) but take two source inputs. +template +SI void apply_adjacent_ternary(T* dst, T* src0, T* src1) { + T* end = src0; + do { + ApplyFn(dst, src0, src1); + dst += 1; + src0 += 1; + src1 += 1; + } while (dst != end); +} + +SI void mix_fn(F* a, F* x, F* y) { + // We reorder the arguments here to match lerp's GLSL-style order (interpolation point last). + *a = lerp(*x, *y, *a); +} + +SI void mix_fn(I32* a, I32* x, I32* y) { + // We reorder the arguments here to match if_then_else's expected order (y before x). + *a = if_then_else(*a, *y, *x); +} + +SI void smoothstep_fn(F* edge0, F* edge1, F* x) { + F t = clamp_01_((*x - *edge0) / (*edge1 - *edge0)); + *edge0 = t * t * (3.0 - 2.0 * t); +} + +#define DECLARE_N_WAY_TERNARY_FLOAT(name) \ + STAGE_TAIL(name##_n_floats, SkRasterPipeline_TernaryOpCtx* ctx) { \ + apply_adjacent_ternary((F*)ctx->dst, (F*)ctx->src0, (F*)ctx->src1); \ + } + +#define DECLARE_TERNARY_FLOAT(name) \ + STAGE_TAIL(name##_float, F* p) { apply_adjacent_ternary(p, p+1, p+2); } \ + STAGE_TAIL(name##_2_floats, F* p) { apply_adjacent_ternary(p, p+2, p+4); } \ + STAGE_TAIL(name##_3_floats, F* p) { apply_adjacent_ternary(p, p+3, p+6); } \ + STAGE_TAIL(name##_4_floats, F* p) { apply_adjacent_ternary(p, p+4, p+8); } \ + DECLARE_N_WAY_TERNARY_FLOAT(name) + +#define DECLARE_TERNARY_INT(name) \ + STAGE_TAIL(name##_int, I32* p) { apply_adjacent_ternary(p, p+1, p+2); } \ + STAGE_TAIL(name##_2_ints, I32* p) { apply_adjacent_ternary(p, p+2, p+4); } \ + STAGE_TAIL(name##_3_ints, I32* p) { apply_adjacent_ternary(p, p+3, p+6); } \ + STAGE_TAIL(name##_4_ints, I32* p) { apply_adjacent_ternary(p, p+4, p+8); } \ + STAGE_TAIL(name##_n_ints, SkRasterPipeline_TernaryOpCtx* ctx) { \ + apply_adjacent_ternary((I32*)ctx->dst, (I32*)ctx->src0, (I32*)ctx->src1); \ + } + +DECLARE_N_WAY_TERNARY_FLOAT(smoothstep) +DECLARE_TERNARY_FLOAT(mix) +DECLARE_TERNARY_INT(mix) + +#undef DECLARE_N_WAY_TERNARY_FLOAT +#undef DECLARE_TERNARY_FLOAT +#undef DECLARE_TERNARY_INT + +STAGE(gauss_a_to_rgba, NoCtx) { + // x = 1 - x; + // exp(-x * x * 4) - 0.018f; + // ... now approximate with quartic + // + const float c4 = -2.26661229133605957031f; + const float c3 = 2.89795351028442382812f; + const float c2 = 0.21345567703247070312f; + const float c1 = 0.15489584207534790039f; + const float c0 = 0.00030726194381713867f; + a = mad(a, mad(a, mad(a, mad(a, c4, c3), c2), c1), c0); + r = a; + g = a; + b = a; +} + +// A specialized fused image shader for clamp-x, clamp-y, non-sRGB sampling. +STAGE(bilerp_clamp_8888, const SkRasterPipeline_GatherCtx* ctx) { + // (cx,cy) are the center of our sample. + F cx = r, + cy = g; + + // All sample points are at the same fractional offset (fx,fy). + // They're the 4 corners of a logical 1x1 pixel surrounding (x,y) at (0.5,0.5) offsets. + F fx = fract(cx + 0.5f), + fy = fract(cy + 0.5f); + + // We'll accumulate the color of all four samples into {r,g,b,a} directly. + r = g = b = a = 0; + + for (float py = -0.5f; py <= +0.5f; py += 1.0f) + for (float px = -0.5f; px <= +0.5f; px += 1.0f) { + // (x,y) are the coordinates of this sample point. + F x = cx + px, + y = cy + py; + + // ix_and_ptr() will clamp to the image's bounds for us. + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, x,y); + + F sr,sg,sb,sa; + from_8888(gather(ptr, ix), &sr,&sg,&sb,&sa); + + // In bilinear interpolation, the 4 pixels at +/- 0.5 offsets from the sample pixel center + // are combined in direct proportion to their area overlapping that logical query pixel. + // At positive offsets, the x-axis contribution to that rectangle is fx, + // or (1-fx) at negative x. Same deal for y. + F sx = (px > 0) ? fx : 1.0f - fx, + sy = (py > 0) ? fy : 1.0f - fy, + area = sx * sy; + + r += sr * area; + g += sg * area; + b += sb * area; + a += sa * area; + } +} + +// A specialized fused image shader for clamp-x, clamp-y, non-sRGB sampling. +STAGE(bicubic_clamp_8888, const SkRasterPipeline_GatherCtx* ctx) { + // (cx,cy) are the center of our sample. + F cx = r, + cy = g; + + // All sample points are at the same fractional offset (fx,fy). + // They're the 4 corners of a logical 1x1 pixel surrounding (x,y) at (0.5,0.5) offsets. + F fx = fract(cx + 0.5f), + fy = fract(cy + 0.5f); + + // We'll accumulate the color of all four samples into {r,g,b,a} directly. + r = g = b = a = 0; + + const float* w = ctx->weights; + const F scaley[4] = {bicubic_wts(fy, w[0], w[4], w[ 8], w[12]), + bicubic_wts(fy, w[1], w[5], w[ 9], w[13]), + bicubic_wts(fy, w[2], w[6], w[10], w[14]), + bicubic_wts(fy, w[3], w[7], w[11], w[15])}; + const F scalex[4] = {bicubic_wts(fx, w[0], w[4], w[ 8], w[12]), + bicubic_wts(fx, w[1], w[5], w[ 9], w[13]), + bicubic_wts(fx, w[2], w[6], w[10], w[14]), + bicubic_wts(fx, w[3], w[7], w[11], w[15])}; + + F sample_y = cy - 1.5f; + for (int yy = 0; yy <= 3; ++yy) { + F sample_x = cx - 1.5f; + for (int xx = 0; xx <= 3; ++xx) { + F scale = scalex[xx] * scaley[yy]; + + // ix_and_ptr() will clamp to the image's bounds for us. + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, sample_x, sample_y); + + F sr,sg,sb,sa; + from_8888(gather(ptr, ix), &sr,&sg,&sb,&sa); + + r = mad(scale, sr, r); + g = mad(scale, sg, g); + b = mad(scale, sb, b); + a = mad(scale, sa, a); + + sample_x += 1; + } + sample_y += 1; + } +} + +// ~~~~~~ skgpu::Swizzle stage ~~~~~~ // + +STAGE(swizzle, void* ctx) { + auto ir = r, ig = g, ib = b, ia = a; + F* o[] = {&r, &g, &b, &a}; + char swiz[4]; + memcpy(swiz, &ctx, sizeof(swiz)); + + for (int i = 0; i < 4; ++i) { + switch (swiz[i]) { + case 'r': *o[i] = ir; break; + case 'g': *o[i] = ig; break; + case 'b': *o[i] = ib; break; + case 'a': *o[i] = ia; break; + case '0': *o[i] = F(0); break; + case '1': *o[i] = F(1); break; + default: break; + } + } +} + +namespace lowp { +#if defined(JUMPER_IS_SCALAR) || defined(SK_DISABLE_LOWP_RASTER_PIPELINE) + // If we're not compiled by Clang, or otherwise switched into scalar mode (old Clang, manually), + // we don't generate lowp stages. All these nullptrs will tell SkJumper.cpp to always use the + // highp float pipeline. + #define M(st) static void (*st)(void) = nullptr; + SK_RASTER_PIPELINE_OPS_LOWP(M) + #undef M + static void (*just_return)(void) = nullptr; + + static void start_pipeline(size_t,size_t,size_t,size_t, SkRasterPipelineStage*) {} + +#else // We are compiling vector code with Clang... let's make some lowp stages! + +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + using U8 = SK_VECTORTYPE(uint8_t, 16); + using U16 = SK_VECTORTYPE(uint16_t, 16); + using I16 = SK_VECTORTYPE(int16_t, 16); + using I32 = SK_VECTORTYPE(int32_t, 16); + using U32 = SK_VECTORTYPE(uint32_t, 16); + using I64 = SK_VECTORTYPE(int64_t, 16); + using U64 = SK_VECTORTYPE(uint64_t, 16); + using F = SK_VECTORTYPE(float, 16); +#else + using U8 = SK_VECTORTYPE(uint8_t, 8); + using U16 = SK_VECTORTYPE(uint16_t, 8); + using I16 = SK_VECTORTYPE(int16_t, 8); + using I32 = SK_VECTORTYPE(int32_t, 8); + using U32 = SK_VECTORTYPE(uint32_t, 8); + using I64 = SK_VECTORTYPE(int64_t, 8); + using U64 = SK_VECTORTYPE(uint64_t, 8); + using F = SK_VECTORTYPE(float, 8); +#endif + +static constexpr size_t N = sizeof(U16) / sizeof(uint16_t); + +// Once again, some platforms benefit from a restricted Stage calling convention, +// but others can pass tons and tons of registers and we're happy to exploit that. +// It's exactly the same decision and implementation strategy as the F stages above. +#if JUMPER_NARROW_STAGES + struct Params { + size_t dx, dy, tail; + U16 dr,dg,db,da; + }; + using Stage = void (ABI*)(Params*, SkRasterPipelineStage* program, U16 r, U16 g, U16 b, U16 a); +#else + using Stage = void (ABI*)(size_t tail, SkRasterPipelineStage* program, + size_t dx, size_t dy, + U16 r, U16 g, U16 b, U16 a, + U16 dr, U16 dg, U16 db, U16 da); +#endif + +static void start_pipeline(const size_t x0, const size_t y0, + const size_t xlimit, const size_t ylimit, + SkRasterPipelineStage* program) { + auto start = (Stage)program->fn; + for (size_t dy = y0; dy < ylimit; dy++) { + #if JUMPER_NARROW_STAGES + Params params = { x0,dy,0, 0,0,0,0 }; + for (; params.dx + N <= xlimit; params.dx += N) { + start(¶ms, program, 0,0,0,0); + } + if (size_t tail = xlimit - params.dx) { + params.tail = tail; + start(¶ms, program, 0,0,0,0); + } + #else + size_t dx = x0; + for (; dx + N <= xlimit; dx += N) { + start( 0, program, dx,dy, 0,0,0,0, 0,0,0,0); + } + if (size_t tail = xlimit - dx) { + start(tail, program, dx,dy, 0,0,0,0, 0,0,0,0); + } + #endif + } +} + +#if JUMPER_NARROW_STAGES + static void ABI just_return(Params*, SkRasterPipelineStage*, U16,U16,U16,U16) {} +#else + static void ABI just_return(size_t, SkRasterPipelineStage*,size_t,size_t, + U16,U16,U16,U16, U16,U16,U16,U16) {} +#endif + +// All stages use the same function call ABI to chain into each other, but there are three types: +// GG: geometry in, geometry out -- think, a matrix +// GP: geometry in, pixels out. -- think, a memory gather +// PP: pixels in, pixels out. -- think, a blend mode +// +// (Some stages ignore their inputs or produce no logical output. That's perfectly fine.) +// +// These three STAGE_ macros let you define each type of stage, +// and will have (x,y) geometry and/or (r,g,b,a, dr,dg,db,da) pixel arguments as appropriate. + +#if JUMPER_NARROW_STAGES + #define STAGE_GG(name, ARG) \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F& x, F& y); \ + static void ABI name(Params* params, SkRasterPipelineStage* program, \ + U16 r, U16 g, U16 b, U16 a) { \ + auto x = join(r,g), \ + y = join(b,a); \ + name##_k(Ctx{program}, params->dx,params->dy,params->tail, x,y); \ + split(x, &r,&g); \ + split(y, &b,&a); \ + auto fn = (Stage)(++program)->fn; \ + fn(params, program, r,g,b,a); \ + } \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F& x, F& y) + + #define STAGE_GP(name, ARG) \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F x, F y, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da); \ + static void ABI name(Params* params, SkRasterPipelineStage* program, \ + U16 r, U16 g, U16 b, U16 a) { \ + auto x = join(r,g), \ + y = join(b,a); \ + name##_k(Ctx{program}, params->dx,params->dy,params->tail, x,y, r,g,b,a, \ + params->dr,params->dg,params->db,params->da); \ + auto fn = (Stage)(++program)->fn; \ + fn(params, program, r,g,b,a); \ + } \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F x, F y, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da) + + #define STAGE_PP(name, ARG) \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da); \ + static void ABI name(Params* params, SkRasterPipelineStage* program, \ + U16 r, U16 g, U16 b, U16 a) { \ + name##_k(Ctx{program}, params->dx,params->dy,params->tail, r,g,b,a, \ + params->dr,params->dg,params->db,params->da); \ + auto fn = (Stage)(++program)->fn; \ + fn(params, program, r,g,b,a); \ + } \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da) +#else + #define STAGE_GG(name, ARG) \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F& x, F& y); \ + static void ABI name(size_t tail, SkRasterPipelineStage* program, \ + size_t dx, size_t dy, \ + U16 r, U16 g, U16 b, U16 a, \ + U16 dr, U16 dg, U16 db, U16 da) { \ + auto x = join(r,g), \ + y = join(b,a); \ + name##_k(Ctx{program}, dx,dy,tail, x,y); \ + split(x, &r,&g); \ + split(y, &b,&a); \ + auto fn = (Stage)(++program)->fn; \ + fn(tail, program, dx,dy, r,g,b,a, dr,dg,db,da); \ + } \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F& x, F& y) + + #define STAGE_GP(name, ARG) \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F x, F y, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da); \ + static void ABI name(size_t tail, SkRasterPipelineStage* program, \ + size_t dx, size_t dy, \ + U16 r, U16 g, U16 b, U16 a, \ + U16 dr, U16 dg, U16 db, U16 da) { \ + auto x = join(r,g), \ + y = join(b,a); \ + name##_k(Ctx{program}, dx,dy,tail, x,y, r,g,b,a, dr,dg,db,da); \ + auto fn = (Stage)(++program)->fn; \ + fn(tail, program, dx,dy, r,g,b,a, dr,dg,db,da); \ + } \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, F x, F y, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da) + + #define STAGE_PP(name, ARG) \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da); \ + static void ABI name(size_t tail, SkRasterPipelineStage* program, \ + size_t dx, size_t dy, \ + U16 r, U16 g, U16 b, U16 a, \ + U16 dr, U16 dg, U16 db, U16 da) { \ + name##_k(Ctx{program}, dx,dy,tail, r,g,b,a, dr,dg,db,da); \ + auto fn = (Stage)(++program)->fn; \ + fn(tail, program, dx,dy, r,g,b,a, dr,dg,db,da); \ + } \ + SI void name##_k(ARG, size_t dx, size_t dy, size_t tail, \ + U16& r, U16& g, U16& b, U16& a, \ + U16& dr, U16& dg, U16& db, U16& da) +#endif + +// ~~~~~~ Commonly used helper functions ~~~~~~ // + +/** + * Helpers to to properly rounded division (by 255). The ideal answer we want to compute is slow, + * thanks to a division by a non-power of two: + * [1] (v + 127) / 255 + * + * There is a two-step process that computes the correct answer for all inputs: + * [2] (v + 128 + ((v + 128) >> 8)) >> 8 + * + * There is also a single iteration approximation, but it's wrong (+-1) ~25% of the time: + * [3] (v + 255) >> 8; + * + * We offer two different implementations here, depending on the requirements of the calling stage. + */ + +/** + * div255 favors speed over accuracy. It uses formula [2] on NEON (where we can compute it as fast + * as [3]), and uses [3] elsewhere. + */ +SI U16 div255(U16 v) { +#if defined(JUMPER_IS_NEON) + // With NEON we can compute [2] just as fast as [3], so let's be correct. + // First we compute v + ((v+128)>>8), then one more round of (...+128)>>8 to finish up: + return vrshrq_n_u16(vrsraq_n_u16(v, v, 8), 8); +#else + // Otherwise, use [3], which is never wrong by more than 1: + return (v+255)/256; +#endif +} + +/** + * div255_accurate guarantees the right answer on all platforms, at the expense of performance. + */ +SI U16 div255_accurate(U16 v) { +#if defined(JUMPER_IS_NEON) + // Our NEON implementation of div255 is already correct for all inputs: + return div255(v); +#else + // This is [2] (the same formulation as NEON), but written without the benefit of intrinsics: + v += 128; + return (v+(v/256))/256; +#endif +} + +SI U16 inv(U16 v) { return 255-v; } + +SI U16 if_then_else(I16 c, U16 t, U16 e) { return (t & sk_bit_cast(c)) | (e & ~sk_bit_cast(c)); } +SI U32 if_then_else(I32 c, U32 t, U32 e) { return (t & sk_bit_cast(c)) | (e & ~sk_bit_cast(c)); } + +SI U16 max(U16 x, U16 y) { return if_then_else(x < y, y, x); } +SI U16 min(U16 x, U16 y) { return if_then_else(x < y, x, y); } + +SI U16 from_float(float f) { return f * 255.0f + 0.5f; } + +SI U16 lerp(U16 from, U16 to, U16 t) { return div255( from*inv(t) + to*t ); } + +template +SI D convert(S src) { + return SK_CONVERTVECTOR(src, D); +} + +#define cast convert + +template +SI void split(S v, D* lo, D* hi) { + static_assert(2*sizeof(D) == sizeof(S), ""); + memcpy(lo, (const char*)&v + 0*sizeof(D), sizeof(D)); + memcpy(hi, (const char*)&v + 1*sizeof(D), sizeof(D)); +} +template +SI D join(S lo, S hi) { + static_assert(sizeof(D) == 2*sizeof(S), ""); + D v; + memcpy((char*)&v + 0*sizeof(S), &lo, sizeof(S)); + memcpy((char*)&v + 1*sizeof(S), &hi, sizeof(S)); + return v; +} + +SI F if_then_else(I32 c, F t, F e) { + return sk_bit_cast( (sk_bit_cast(t) & c) | (sk_bit_cast(e) & ~c) ); +} +SI F max(F x, F y) { return if_then_else(x < y, y, x); } +SI F min(F x, F y) { return if_then_else(x < y, x, y); } + +SI I32 if_then_else(I32 c, I32 t, I32 e) { + return (t & c) | (e & ~c); +} +SI I32 max(I32 x, I32 y) { return if_then_else(x < y, y, x); } +SI I32 min(I32 x, I32 y) { return if_then_else(x < y, x, y); } + +SI F mad(F f, F m, F a) { return f*m+a; } +SI U32 trunc_(F x) { return cast(cast(x)); } + +// Use approximate instructions and one Newton-Raphson step to calculate 1/x. +SI F rcp_precise(F x) { +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + __m256 lo,hi; + split(x, &lo,&hi); + return join(SK_OPTS_NS::rcp_precise(lo), SK_OPTS_NS::rcp_precise(hi)); +#elif defined(JUMPER_IS_SSE2) || defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + __m128 lo,hi; + split(x, &lo,&hi); + return join(SK_OPTS_NS::rcp_precise(lo), SK_OPTS_NS::rcp_precise(hi)); +#elif defined(JUMPER_IS_NEON) + float32x4_t lo,hi; + split(x, &lo,&hi); + return join(SK_OPTS_NS::rcp_precise(lo), SK_OPTS_NS::rcp_precise(hi)); +#else + return 1.0f / x; +#endif +} +SI F sqrt_(F x) { +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + __m256 lo,hi; + split(x, &lo,&hi); + return join(_mm256_sqrt_ps(lo), _mm256_sqrt_ps(hi)); +#elif defined(JUMPER_IS_SSE2) || defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + __m128 lo,hi; + split(x, &lo,&hi); + return join(_mm_sqrt_ps(lo), _mm_sqrt_ps(hi)); +#elif defined(SK_CPU_ARM64) + float32x4_t lo,hi; + split(x, &lo,&hi); + return join(vsqrtq_f32(lo), vsqrtq_f32(hi)); +#elif defined(JUMPER_IS_NEON) + auto sqrt = [](float32x4_t v) { + auto est = vrsqrteq_f32(v); // Estimate and two refinement steps for est = rsqrt(v). + est *= vrsqrtsq_f32(v,est*est); + est *= vrsqrtsq_f32(v,est*est); + return v*est; // sqrt(v) == v*rsqrt(v). + }; + float32x4_t lo,hi; + split(x, &lo,&hi); + return join(sqrt(lo), sqrt(hi)); +#else + return F{ + sqrtf(x[0]), sqrtf(x[1]), sqrtf(x[2]), sqrtf(x[3]), + sqrtf(x[4]), sqrtf(x[5]), sqrtf(x[6]), sqrtf(x[7]), + }; +#endif +} + +SI F floor_(F x) { +#if defined(SK_CPU_ARM64) + float32x4_t lo,hi; + split(x, &lo,&hi); + return join(vrndmq_f32(lo), vrndmq_f32(hi)); +#elif defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + __m256 lo,hi; + split(x, &lo,&hi); + return join(_mm256_floor_ps(lo), _mm256_floor_ps(hi)); +#elif defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + __m128 lo,hi; + split(x, &lo,&hi); + return join(_mm_floor_ps(lo), _mm_floor_ps(hi)); +#else + F roundtrip = cast(cast(x)); + return roundtrip - if_then_else(roundtrip > x, F(1), F(0)); +#endif +} + +// scaled_mult interprets a and b as number on [-1, 1) which are numbers in Q15 format. Functionally +// this multiply is: +// (2 * a * b + (1 << 15)) >> 16 +// The result is a number on [-1, 1). +// Note: on neon this is a saturating multiply while the others are not. +SI I16 scaled_mult(I16 a, I16 b) { +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + return _mm256_mulhrs_epi16(a, b); +#elif defined(JUMPER_IS_SSE41) || defined(JUMPER_IS_AVX) + return _mm_mulhrs_epi16(a, b); +#elif defined(SK_CPU_ARM64) + return vqrdmulhq_s16(a, b); +#elif defined(JUMPER_IS_NEON) + return vqrdmulhq_s16(a, b); +#else + const I32 roundingTerm = 1 << 14; + return cast((cast(a) * cast(b) + roundingTerm) >> 15); +#endif +} + +// This sum is to support lerp where the result will always be a positive number. In general, +// a sum like this would require an additional bit, but because we know the range of the result +// we know that the extra bit will always be zero. +SI U16 constrained_add(I16 a, U16 b) { + #if defined(SK_DEBUG) + for (size_t i = 0; i < N; i++) { + // Ensure that a + b is on the interval [0, UINT16_MAX] + int ia = a[i], + ib = b[i]; + // Use 65535 here because fuchsia's compiler evaluates UINT16_MAX - ib, which is + // 65536U - ib, as an uint32_t instead of an int32_t. This was forcing ia to be + // interpreted as an uint32_t. + SkASSERT(-ib <= ia && ia <= 65535 - ib); + } + #endif + return b + cast(a); +} + +SI F fract(F x) { return x - floor_(x); } +SI F abs_(F x) { return sk_bit_cast( sk_bit_cast(x) & 0x7fffffff ); } + +// ~~~~~~ Basic / misc. stages ~~~~~~ // + +STAGE_GG(seed_shader, NoCtx) { + static constexpr float iota[] = { + 0.5f, 1.5f, 2.5f, 3.5f, 4.5f, 5.5f, 6.5f, 7.5f, + 8.5f, 9.5f,10.5f,11.5f,12.5f,13.5f,14.5f,15.5f, + }; + x = cast(I32(dx)) + sk_unaligned_load(iota); + y = cast(I32(dy)) + 0.5f; +} + +STAGE_GG(matrix_translate, const float* m) { + x += m[0]; + y += m[1]; +} +STAGE_GG(matrix_scale_translate, const float* m) { + x = mad(x,m[0], m[2]); + y = mad(y,m[1], m[3]); +} +STAGE_GG(matrix_2x3, const float* m) { + auto X = mad(x,m[0], mad(y,m[1], m[2])), + Y = mad(x,m[3], mad(y,m[4], m[5])); + x = X; + y = Y; +} +STAGE_GG(matrix_perspective, const float* m) { + // N.B. Unlike the other matrix_ stages, this matrix is row-major. + auto X = mad(x,m[0], mad(y,m[1], m[2])), + Y = mad(x,m[3], mad(y,m[4], m[5])), + Z = mad(x,m[6], mad(y,m[7], m[8])); + x = X * rcp_precise(Z); + y = Y * rcp_precise(Z); +} + +STAGE_PP(uniform_color, const SkRasterPipeline_UniformColorCtx* c) { + r = c->rgba[0]; + g = c->rgba[1]; + b = c->rgba[2]; + a = c->rgba[3]; +} +STAGE_PP(uniform_color_dst, const SkRasterPipeline_UniformColorCtx* c) { + dr = c->rgba[0]; + dg = c->rgba[1]; + db = c->rgba[2]; + da = c->rgba[3]; +} +STAGE_PP(black_color, NoCtx) { r = g = b = 0; a = 255; } +STAGE_PP(white_color, NoCtx) { r = g = b = 255; a = 255; } + +STAGE_PP(set_rgb, const float rgb[3]) { + r = from_float(rgb[0]); + g = from_float(rgb[1]); + b = from_float(rgb[2]); +} + +// No need to clamp against 0 here (values are unsigned) +STAGE_PP(clamp_01, NoCtx) { + r = min(r, 255); + g = min(g, 255); + b = min(b, 255); + a = min(a, 255); +} + +STAGE_PP(clamp_gamut, NoCtx) { + a = min(a, 255); + r = min(r, a); + g = min(g, a); + b = min(b, a); +} + +STAGE_PP(premul, NoCtx) { + r = div255_accurate(r * a); + g = div255_accurate(g * a); + b = div255_accurate(b * a); +} +STAGE_PP(premul_dst, NoCtx) { + dr = div255_accurate(dr * da); + dg = div255_accurate(dg * da); + db = div255_accurate(db * da); +} + +STAGE_PP(force_opaque , NoCtx) { a = 255; } +STAGE_PP(force_opaque_dst, NoCtx) { da = 255; } + +STAGE_PP(swap_rb, NoCtx) { + auto tmp = r; + r = b; + b = tmp; +} +STAGE_PP(swap_rb_dst, NoCtx) { + auto tmp = dr; + dr = db; + db = tmp; +} + +STAGE_PP(move_src_dst, NoCtx) { + dr = r; + dg = g; + db = b; + da = a; +} + +STAGE_PP(move_dst_src, NoCtx) { + r = dr; + g = dg; + b = db; + a = da; +} + +STAGE_PP(swap_src_dst, NoCtx) { + std::swap(r, dr); + std::swap(g, dg); + std::swap(b, db); + std::swap(a, da); +} + +// ~~~~~~ Blend modes ~~~~~~ // + +// The same logic applied to all 4 channels. +#define BLEND_MODE(name) \ + SI U16 name##_channel(U16 s, U16 d, U16 sa, U16 da); \ + STAGE_PP(name, NoCtx) { \ + r = name##_channel(r,dr,a,da); \ + g = name##_channel(g,dg,a,da); \ + b = name##_channel(b,db,a,da); \ + a = name##_channel(a,da,a,da); \ + } \ + SI U16 name##_channel(U16 s, U16 d, U16 sa, U16 da) + + BLEND_MODE(clear) { return 0; } + BLEND_MODE(srcatop) { return div255( s*da + d*inv(sa) ); } + BLEND_MODE(dstatop) { return div255( d*sa + s*inv(da) ); } + BLEND_MODE(srcin) { return div255( s*da ); } + BLEND_MODE(dstin) { return div255( d*sa ); } + BLEND_MODE(srcout) { return div255( s*inv(da) ); } + BLEND_MODE(dstout) { return div255( d*inv(sa) ); } + BLEND_MODE(srcover) { return s + div255( d*inv(sa) ); } + BLEND_MODE(dstover) { return d + div255( s*inv(da) ); } + BLEND_MODE(modulate) { return div255( s*d ); } + BLEND_MODE(multiply) { return div255( s*inv(da) + d*inv(sa) + s*d ); } + BLEND_MODE(plus_) { return min(s+d, 255); } + BLEND_MODE(screen) { return s + d - div255( s*d ); } + BLEND_MODE(xor_) { return div255( s*inv(da) + d*inv(sa) ); } +#undef BLEND_MODE + +// The same logic applied to color, and srcover for alpha. +#define BLEND_MODE(name) \ + SI U16 name##_channel(U16 s, U16 d, U16 sa, U16 da); \ + STAGE_PP(name, NoCtx) { \ + r = name##_channel(r,dr,a,da); \ + g = name##_channel(g,dg,a,da); \ + b = name##_channel(b,db,a,da); \ + a = a + div255( da*inv(a) ); \ + } \ + SI U16 name##_channel(U16 s, U16 d, U16 sa, U16 da) + + BLEND_MODE(darken) { return s + d - div255( max(s*da, d*sa) ); } + BLEND_MODE(lighten) { return s + d - div255( min(s*da, d*sa) ); } + BLEND_MODE(difference) { return s + d - 2*div255( min(s*da, d*sa) ); } + BLEND_MODE(exclusion) { return s + d - 2*div255( s*d ); } + + BLEND_MODE(hardlight) { + return div255( s*inv(da) + d*inv(sa) + + if_then_else(2*s <= sa, 2*s*d, sa*da - 2*(sa-s)*(da-d)) ); + } + BLEND_MODE(overlay) { + return div255( s*inv(da) + d*inv(sa) + + if_then_else(2*d <= da, 2*s*d, sa*da - 2*(sa-s)*(da-d)) ); + } +#undef BLEND_MODE + +// ~~~~~~ Helpers for interacting with memory ~~~~~~ // + +template +SI T* ptr_at_xy(const SkRasterPipeline_MemoryCtx* ctx, size_t dx, size_t dy) { + return (T*)ctx->pixels + dy*ctx->stride + dx; +} + +template +SI U32 ix_and_ptr(T** ptr, const SkRasterPipeline_GatherCtx* ctx, F x, F y) { + // Exclusive -> inclusive. + const F w = sk_bit_cast( sk_bit_cast(ctx->width ) - 1), + h = sk_bit_cast( sk_bit_cast(ctx->height) - 1); + + const F z = std::numeric_limits::min(); + + x = min(max(z, x), w); + y = min(max(z, y), h); + + x = sk_bit_cast(sk_bit_cast(x) - (uint32_t)ctx->roundDownAtInteger); + y = sk_bit_cast(sk_bit_cast(y) - (uint32_t)ctx->roundDownAtInteger); + + *ptr = (const T*)ctx->pixels; + return trunc_(y)*ctx->stride + trunc_(x); +} + +template +SI U32 ix_and_ptr(T** ptr, const SkRasterPipeline_GatherCtx* ctx, I32 x, I32 y) { + // This flag doesn't make sense when the coords are integers. + SkASSERT(ctx->roundDownAtInteger == 0); + // Exclusive -> inclusive. + const I32 w = ctx->width - 1, + h = ctx->height - 1; + + U32 ax = cast(min(max(0, x), w)), + ay = cast(min(max(0, y), h)); + + *ptr = (const T*)ctx->pixels; + return ay * ctx->stride + ax; +} + +template +SI V load(const T* ptr, size_t tail) { + V v = 0; + switch (tail & (N-1)) { + case 0: memcpy(&v, ptr, sizeof(v)); break; + #if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + case 15: v[14] = ptr[14]; [[fallthrough]]; + case 14: v[13] = ptr[13]; [[fallthrough]]; + case 13: v[12] = ptr[12]; [[fallthrough]]; + case 12: memcpy(&v, ptr, 12*sizeof(T)); break; + case 11: v[10] = ptr[10]; [[fallthrough]]; + case 10: v[ 9] = ptr[ 9]; [[fallthrough]]; + case 9: v[ 8] = ptr[ 8]; [[fallthrough]]; + case 8: memcpy(&v, ptr, 8*sizeof(T)); break; + #endif + case 7: v[ 6] = ptr[ 6]; [[fallthrough]]; + case 6: v[ 5] = ptr[ 5]; [[fallthrough]]; + case 5: v[ 4] = ptr[ 4]; [[fallthrough]]; + case 4: memcpy(&v, ptr, 4*sizeof(T)); break; + case 3: v[ 2] = ptr[ 2]; [[fallthrough]]; + case 2: memcpy(&v, ptr, 2*sizeof(T)); break; + case 1: v[ 0] = ptr[ 0]; + } + return v; +} +template +SI void store(T* ptr, size_t tail, V v) { + switch (tail & (N-1)) { + case 0: memcpy(ptr, &v, sizeof(v)); break; + #if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + case 15: ptr[14] = v[14]; [[fallthrough]]; + case 14: ptr[13] = v[13]; [[fallthrough]]; + case 13: ptr[12] = v[12]; [[fallthrough]]; + case 12: memcpy(ptr, &v, 12*sizeof(T)); break; + case 11: ptr[10] = v[10]; [[fallthrough]]; + case 10: ptr[ 9] = v[ 9]; [[fallthrough]]; + case 9: ptr[ 8] = v[ 8]; [[fallthrough]]; + case 8: memcpy(ptr, &v, 8*sizeof(T)); break; + #endif + case 7: ptr[ 6] = v[ 6]; [[fallthrough]]; + case 6: ptr[ 5] = v[ 5]; [[fallthrough]]; + case 5: ptr[ 4] = v[ 4]; [[fallthrough]]; + case 4: memcpy(ptr, &v, 4*sizeof(T)); break; + case 3: ptr[ 2] = v[ 2]; [[fallthrough]]; + case 2: memcpy(ptr, &v, 2*sizeof(T)); break; + case 1: ptr[ 0] = v[ 0]; + } +} + +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + template + SI V gather(const T* ptr, U32 ix) { + return V{ ptr[ix[ 0]], ptr[ix[ 1]], ptr[ix[ 2]], ptr[ix[ 3]], + ptr[ix[ 4]], ptr[ix[ 5]], ptr[ix[ 6]], ptr[ix[ 7]], + ptr[ix[ 8]], ptr[ix[ 9]], ptr[ix[10]], ptr[ix[11]], + ptr[ix[12]], ptr[ix[13]], ptr[ix[14]], ptr[ix[15]], }; + } + + template<> + F gather(const float* ptr, U32 ix) { + __m256i lo, hi; + split(ix, &lo, &hi); + + return join(_mm256_i32gather_ps(ptr, lo, 4), + _mm256_i32gather_ps(ptr, hi, 4)); + } + + template<> + U32 gather(const uint32_t* ptr, U32 ix) { + __m256i lo, hi; + split(ix, &lo, &hi); + + return join(_mm256_i32gather_epi32((const int*)ptr, lo, 4), + _mm256_i32gather_epi32((const int*)ptr, hi, 4)); + } +#else + template + SI V gather(const T* ptr, U32 ix) { + return V{ ptr[ix[ 0]], ptr[ix[ 1]], ptr[ix[ 2]], ptr[ix[ 3]], + ptr[ix[ 4]], ptr[ix[ 5]], ptr[ix[ 6]], ptr[ix[ 7]], }; + } +#endif + + +// ~~~~~~ 32-bit memory loads and stores ~~~~~~ // + +SI void from_8888(U32 rgba, U16* r, U16* g, U16* b, U16* a) { +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + // Swap the middle 128-bit lanes to make _mm256_packus_epi32() in cast_U16() work out nicely. + __m256i _01,_23; + split(rgba, &_01, &_23); + __m256i _02 = _mm256_permute2x128_si256(_01,_23, 0x20), + _13 = _mm256_permute2x128_si256(_01,_23, 0x31); + rgba = join(_02, _13); + + auto cast_U16 = [](U32 v) -> U16 { + __m256i _02,_13; + split(v, &_02,&_13); + return _mm256_packus_epi32(_02,_13); + }; +#else + auto cast_U16 = [](U32 v) -> U16 { + return cast(v); + }; +#endif + *r = cast_U16(rgba & 65535) & 255; + *g = cast_U16(rgba & 65535) >> 8; + *b = cast_U16(rgba >> 16) & 255; + *a = cast_U16(rgba >> 16) >> 8; +} + +SI void load_8888_(const uint32_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { +#if 1 && defined(JUMPER_IS_NEON) + uint8x8x4_t rgba; + switch (tail & (N-1)) { + case 0: rgba = vld4_u8 ((const uint8_t*)(ptr+0) ); break; + case 7: rgba = vld4_lane_u8((const uint8_t*)(ptr+6), rgba, 6); [[fallthrough]]; + case 6: rgba = vld4_lane_u8((const uint8_t*)(ptr+5), rgba, 5); [[fallthrough]]; + case 5: rgba = vld4_lane_u8((const uint8_t*)(ptr+4), rgba, 4); [[fallthrough]]; + case 4: rgba = vld4_lane_u8((const uint8_t*)(ptr+3), rgba, 3); [[fallthrough]]; + case 3: rgba = vld4_lane_u8((const uint8_t*)(ptr+2), rgba, 2); [[fallthrough]]; + case 2: rgba = vld4_lane_u8((const uint8_t*)(ptr+1), rgba, 1); [[fallthrough]]; + case 1: rgba = vld4_lane_u8((const uint8_t*)(ptr+0), rgba, 0); + } + *r = cast(sk_bit_cast(rgba.val[0])); + *g = cast(sk_bit_cast(rgba.val[1])); + *b = cast(sk_bit_cast(rgba.val[2])); + *a = cast(sk_bit_cast(rgba.val[3])); +#else + from_8888(load(ptr, tail), r,g,b,a); +#endif +} +SI void store_8888_(uint32_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { + r = min(r, 255); + g = min(g, 255); + b = min(b, 255); + a = min(a, 255); + +#if 1 && defined(JUMPER_IS_NEON) + uint8x8x4_t rgba = {{ + cast(r), + cast(g), + cast(b), + cast(a), + }}; + switch (tail & (N-1)) { + case 0: vst4_u8 ((uint8_t*)(ptr+0), rgba ); break; + case 7: vst4_lane_u8((uint8_t*)(ptr+6), rgba, 6); [[fallthrough]]; + case 6: vst4_lane_u8((uint8_t*)(ptr+5), rgba, 5); [[fallthrough]]; + case 5: vst4_lane_u8((uint8_t*)(ptr+4), rgba, 4); [[fallthrough]]; + case 4: vst4_lane_u8((uint8_t*)(ptr+3), rgba, 3); [[fallthrough]]; + case 3: vst4_lane_u8((uint8_t*)(ptr+2), rgba, 2); [[fallthrough]]; + case 2: vst4_lane_u8((uint8_t*)(ptr+1), rgba, 1); [[fallthrough]]; + case 1: vst4_lane_u8((uint8_t*)(ptr+0), rgba, 0); + } +#else + store(ptr, tail, cast(r | (g<<8)) << 0 + | cast(b | (a<<8)) << 16); +#endif +} + +STAGE_PP(load_8888, const SkRasterPipeline_MemoryCtx* ctx) { + load_8888_(ptr_at_xy(ctx, dx,dy), tail, &r,&g,&b,&a); +} +STAGE_PP(load_8888_dst, const SkRasterPipeline_MemoryCtx* ctx) { + load_8888_(ptr_at_xy(ctx, dx,dy), tail, &dr,&dg,&db,&da); +} +STAGE_PP(store_8888, const SkRasterPipeline_MemoryCtx* ctx) { + store_8888_(ptr_at_xy(ctx, dx,dy), tail, r,g,b,a); +} +STAGE_GP(gather_8888, const SkRasterPipeline_GatherCtx* ctx) { + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, x,y); + from_8888(gather(ptr, ix), &r, &g, &b, &a); +} + +// ~~~~~~ 16-bit memory loads and stores ~~~~~~ // + +SI void from_565(U16 rgb, U16* r, U16* g, U16* b) { + // Format for 565 buffers: 15|rrrrr gggggg bbbbb|0 + U16 R = (rgb >> 11) & 31, + G = (rgb >> 5) & 63, + B = (rgb >> 0) & 31; + + // These bit replications are the same as multiplying by 255/31 or 255/63 to scale to 8-bit. + *r = (R << 3) | (R >> 2); + *g = (G << 2) | (G >> 4); + *b = (B << 3) | (B >> 2); +} +SI void load_565_(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { + from_565(load(ptr, tail), r,g,b); +} +SI void store_565_(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b) { + r = min(r, 255); + g = min(g, 255); + b = min(b, 255); + + // Round from [0,255] to [0,31] or [0,63], as if x * (31/255.0f) + 0.5f. + // (Don't feel like you need to find some fundamental truth in these... + // they were brute-force searched.) + U16 R = (r * 9 + 36) / 74, // 9/74 ≈ 31/255, plus 36/74, about half. + G = (g * 21 + 42) / 85, // 21/85 = 63/255 exactly. + B = (b * 9 + 36) / 74; + // Pack them back into 15|rrrrr gggggg bbbbb|0. + store(ptr, tail, R << 11 + | G << 5 + | B << 0); +} + +STAGE_PP(load_565, const SkRasterPipeline_MemoryCtx* ctx) { + load_565_(ptr_at_xy(ctx, dx,dy), tail, &r,&g,&b); + a = 255; +} +STAGE_PP(load_565_dst, const SkRasterPipeline_MemoryCtx* ctx) { + load_565_(ptr_at_xy(ctx, dx,dy), tail, &dr,&dg,&db); + da = 255; +} +STAGE_PP(store_565, const SkRasterPipeline_MemoryCtx* ctx) { + store_565_(ptr_at_xy(ctx, dx,dy), tail, r,g,b); +} +STAGE_GP(gather_565, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, x,y); + from_565(gather(ptr, ix), &r, &g, &b); + a = 255; +} + +SI void from_4444(U16 rgba, U16* r, U16* g, U16* b, U16* a) { + // Format for 4444 buffers: 15|rrrr gggg bbbb aaaa|0. + U16 R = (rgba >> 12) & 15, + G = (rgba >> 8) & 15, + B = (rgba >> 4) & 15, + A = (rgba >> 0) & 15; + + // Scale [0,15] to [0,255]. + *r = (R << 4) | R; + *g = (G << 4) | G; + *b = (B << 4) | B; + *a = (A << 4) | A; +} +SI void load_4444_(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { + from_4444(load(ptr, tail), r,g,b,a); +} +SI void store_4444_(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { + r = min(r, 255); + g = min(g, 255); + b = min(b, 255); + a = min(a, 255); + + // Round from [0,255] to [0,15], producing the same value as (x*(15/255.0f) + 0.5f). + U16 R = (r + 8) / 17, + G = (g + 8) / 17, + B = (b + 8) / 17, + A = (a + 8) / 17; + // Pack them back into 15|rrrr gggg bbbb aaaa|0. + store(ptr, tail, R << 12 + | G << 8 + | B << 4 + | A << 0); +} + +STAGE_PP(load_4444, const SkRasterPipeline_MemoryCtx* ctx) { + load_4444_(ptr_at_xy(ctx, dx,dy), tail, &r,&g,&b,&a); +} +STAGE_PP(load_4444_dst, const SkRasterPipeline_MemoryCtx* ctx) { + load_4444_(ptr_at_xy(ctx, dx,dy), tail, &dr,&dg,&db,&da); +} +STAGE_PP(store_4444, const SkRasterPipeline_MemoryCtx* ctx) { + store_4444_(ptr_at_xy(ctx, dx,dy), tail, r,g,b,a); +} +STAGE_GP(gather_4444, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, x,y); + from_4444(gather(ptr, ix), &r,&g,&b,&a); +} + +SI void from_88(U16 rg, U16* r, U16* g) { + *r = (rg & 0xFF); + *g = (rg >> 8); +} + +SI void load_88_(const uint16_t* ptr, size_t tail, U16* r, U16* g) { +#if 1 && defined(JUMPER_IS_NEON) + uint8x8x2_t rg; + switch (tail & (N-1)) { + case 0: rg = vld2_u8 ((const uint8_t*)(ptr+0) ); break; + case 7: rg = vld2_lane_u8((const uint8_t*)(ptr+6), rg, 6); [[fallthrough]]; + case 6: rg = vld2_lane_u8((const uint8_t*)(ptr+5), rg, 5); [[fallthrough]]; + case 5: rg = vld2_lane_u8((const uint8_t*)(ptr+4), rg, 4); [[fallthrough]]; + case 4: rg = vld2_lane_u8((const uint8_t*)(ptr+3), rg, 3); [[fallthrough]]; + case 3: rg = vld2_lane_u8((const uint8_t*)(ptr+2), rg, 2); [[fallthrough]]; + case 2: rg = vld2_lane_u8((const uint8_t*)(ptr+1), rg, 1); [[fallthrough]]; + case 1: rg = vld2_lane_u8((const uint8_t*)(ptr+0), rg, 0); + } + *r = cast(U8(rg.val[0])); + *g = cast(U8(rg.val[1])); +#else + from_88(load(ptr, tail), r,g); +#endif +} + +SI void store_88_(uint16_t* ptr, size_t tail, U16 r, U16 g) { + r = min(r, 255); + g = min(g, 255); + +#if 1 && defined(JUMPER_IS_NEON) + uint8x8x2_t rg = {{ + cast(r), + cast(g), + }}; + switch (tail & (N-1)) { + case 0: vst2_u8 ((uint8_t*)(ptr+0), rg ); break; + case 7: vst2_lane_u8((uint8_t*)(ptr+6), rg, 6); [[fallthrough]]; + case 6: vst2_lane_u8((uint8_t*)(ptr+5), rg, 5); [[fallthrough]]; + case 5: vst2_lane_u8((uint8_t*)(ptr+4), rg, 4); [[fallthrough]]; + case 4: vst2_lane_u8((uint8_t*)(ptr+3), rg, 3); [[fallthrough]]; + case 3: vst2_lane_u8((uint8_t*)(ptr+2), rg, 2); [[fallthrough]]; + case 2: vst2_lane_u8((uint8_t*)(ptr+1), rg, 1); [[fallthrough]]; + case 1: vst2_lane_u8((uint8_t*)(ptr+0), rg, 0); + } +#else + store(ptr, tail, cast(r | (g<<8)) << 0); +#endif +} + +STAGE_PP(load_rg88, const SkRasterPipeline_MemoryCtx* ctx) { + load_88_(ptr_at_xy(ctx, dx, dy), tail, &r, &g); + b = 0; + a = 255; +} +STAGE_PP(load_rg88_dst, const SkRasterPipeline_MemoryCtx* ctx) { + load_88_(ptr_at_xy(ctx, dx, dy), tail, &dr, &dg); + db = 0; + da = 255; +} +STAGE_PP(store_rg88, const SkRasterPipeline_MemoryCtx* ctx) { + store_88_(ptr_at_xy(ctx, dx, dy), tail, r, g); +} +STAGE_GP(gather_rg88, const SkRasterPipeline_GatherCtx* ctx) { + const uint16_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, x, y); + from_88(gather(ptr, ix), &r, &g); + b = 0; + a = 255; +} + +// ~~~~~~ 8-bit memory loads and stores ~~~~~~ // + +SI U16 load_8(const uint8_t* ptr, size_t tail) { + return cast(load(ptr, tail)); +} +SI void store_8(uint8_t* ptr, size_t tail, U16 v) { + v = min(v, 255); + store(ptr, tail, cast(v)); +} + +STAGE_PP(load_a8, const SkRasterPipeline_MemoryCtx* ctx) { + r = g = b = 0; + a = load_8(ptr_at_xy(ctx, dx,dy), tail); +} +STAGE_PP(load_a8_dst, const SkRasterPipeline_MemoryCtx* ctx) { + dr = dg = db = 0; + da = load_8(ptr_at_xy(ctx, dx,dy), tail); +} +STAGE_PP(store_a8, const SkRasterPipeline_MemoryCtx* ctx) { + store_8(ptr_at_xy(ctx, dx,dy), tail, a); +} +STAGE_GP(gather_a8, const SkRasterPipeline_GatherCtx* ctx) { + const uint8_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, x,y); + r = g = b = 0; + a = cast(gather(ptr, ix)); +} +STAGE_PP(store_r8, const SkRasterPipeline_MemoryCtx* ctx) { + store_8(ptr_at_xy(ctx, dx,dy), tail, r); +} + +STAGE_PP(alpha_to_gray, NoCtx) { + r = g = b = a; + a = 255; +} +STAGE_PP(alpha_to_gray_dst, NoCtx) { + dr = dg = db = da; + da = 255; +} +STAGE_PP(alpha_to_red, NoCtx) { + r = a; + a = 255; +} +STAGE_PP(alpha_to_red_dst, NoCtx) { + dr = da; + da = 255; +} + +STAGE_PP(bt709_luminance_or_luma_to_alpha, NoCtx) { + a = (r*54 + g*183 + b*19)/256; // 0.2126, 0.7152, 0.0722 with 256 denominator. + r = g = b = 0; +} +STAGE_PP(bt709_luminance_or_luma_to_rgb, NoCtx) { + r = g = b =(r*54 + g*183 + b*19)/256; // 0.2126, 0.7152, 0.0722 with 256 denominator. +} + +// ~~~~~~ Coverage scales / lerps ~~~~~~ // + +STAGE_PP(load_src, const uint16_t* ptr) { + r = sk_unaligned_load(ptr + 0*N); + g = sk_unaligned_load(ptr + 1*N); + b = sk_unaligned_load(ptr + 2*N); + a = sk_unaligned_load(ptr + 3*N); +} +STAGE_PP(store_src, uint16_t* ptr) { + sk_unaligned_store(ptr + 0*N, r); + sk_unaligned_store(ptr + 1*N, g); + sk_unaligned_store(ptr + 2*N, b); + sk_unaligned_store(ptr + 3*N, a); +} +STAGE_PP(store_src_a, uint16_t* ptr) { + sk_unaligned_store(ptr, a); +} +STAGE_PP(load_dst, const uint16_t* ptr) { + dr = sk_unaligned_load(ptr + 0*N); + dg = sk_unaligned_load(ptr + 1*N); + db = sk_unaligned_load(ptr + 2*N); + da = sk_unaligned_load(ptr + 3*N); +} +STAGE_PP(store_dst, uint16_t* ptr) { + sk_unaligned_store(ptr + 0*N, dr); + sk_unaligned_store(ptr + 1*N, dg); + sk_unaligned_store(ptr + 2*N, db); + sk_unaligned_store(ptr + 3*N, da); +} + +// ~~~~~~ Coverage scales / lerps ~~~~~~ // + +STAGE_PP(scale_1_float, const float* f) { + U16 c = from_float(*f); + r = div255( r * c ); + g = div255( g * c ); + b = div255( b * c ); + a = div255( a * c ); +} +STAGE_PP(lerp_1_float, const float* f) { + U16 c = from_float(*f); + r = lerp(dr, r, c); + g = lerp(dg, g, c); + b = lerp(db, b, c); + a = lerp(da, a, c); +} +STAGE_PP(scale_native, const uint16_t scales[]) { + auto c = sk_unaligned_load(scales); + r = div255( r * c ); + g = div255( g * c ); + b = div255( b * c ); + a = div255( a * c ); +} + +STAGE_PP(lerp_native, const uint16_t scales[]) { + auto c = sk_unaligned_load(scales); + r = lerp(dr, r, c); + g = lerp(dg, g, c); + b = lerp(db, b, c); + a = lerp(da, a, c); +} + +STAGE_PP(scale_u8, const SkRasterPipeline_MemoryCtx* ctx) { + U16 c = load_8(ptr_at_xy(ctx, dx,dy), tail); + r = div255( r * c ); + g = div255( g * c ); + b = div255( b * c ); + a = div255( a * c ); +} +STAGE_PP(lerp_u8, const SkRasterPipeline_MemoryCtx* ctx) { + U16 c = load_8(ptr_at_xy(ctx, dx,dy), tail); + r = lerp(dr, r, c); + g = lerp(dg, g, c); + b = lerp(db, b, c); + a = lerp(da, a, c); +} + +// Derive alpha's coverage from rgb coverage and the values of src and dst alpha. +SI U16 alpha_coverage_from_rgb_coverage(U16 a, U16 da, U16 cr, U16 cg, U16 cb) { + return if_then_else(a < da, min(cr, min(cg,cb)) + , max(cr, max(cg,cb))); +} +STAGE_PP(scale_565, const SkRasterPipeline_MemoryCtx* ctx) { + U16 cr,cg,cb; + load_565_(ptr_at_xy(ctx, dx,dy), tail, &cr,&cg,&cb); + U16 ca = alpha_coverage_from_rgb_coverage(a,da, cr,cg,cb); + + r = div255( r * cr ); + g = div255( g * cg ); + b = div255( b * cb ); + a = div255( a * ca ); +} +STAGE_PP(lerp_565, const SkRasterPipeline_MemoryCtx* ctx) { + U16 cr,cg,cb; + load_565_(ptr_at_xy(ctx, dx,dy), tail, &cr,&cg,&cb); + U16 ca = alpha_coverage_from_rgb_coverage(a,da, cr,cg,cb); + + r = lerp(dr, r, cr); + g = lerp(dg, g, cg); + b = lerp(db, b, cb); + a = lerp(da, a, ca); +} + +STAGE_PP(emboss, const SkRasterPipeline_EmbossCtx* ctx) { + U16 mul = load_8(ptr_at_xy(&ctx->mul, dx,dy), tail), + add = load_8(ptr_at_xy(&ctx->add, dx,dy), tail); + + r = min(div255(r*mul) + add, a); + g = min(div255(g*mul) + add, a); + b = min(div255(b*mul) + add, a); +} + + +// ~~~~~~ Gradient stages ~~~~~~ // + +// Clamp x to [0,1], both sides inclusive (think, gradients). +// Even repeat and mirror funnel through a clamp to handle bad inputs like +Inf, NaN. +SI F clamp_01_(F v) { return min(max(0, v), 1); } + +STAGE_GG(clamp_x_1 , NoCtx) { x = clamp_01_(x); } +STAGE_GG(repeat_x_1, NoCtx) { x = clamp_01_(x - floor_(x)); } +STAGE_GG(mirror_x_1, NoCtx) { + auto two = [](F x){ return x+x; }; + x = clamp_01_(abs_( (x-1.0f) - two(floor_((x-1.0f)*0.5f)) - 1.0f )); +} + +SI I16 cond_to_mask_16(I32 cond) { return cast(cond); } + +STAGE_GG(decal_x, SkRasterPipeline_DecalTileCtx* ctx) { + auto w = ctx->limit_x; + sk_unaligned_store(ctx->mask, cond_to_mask_16((0 <= x) & (x < w))); +} +STAGE_GG(decal_y, SkRasterPipeline_DecalTileCtx* ctx) { + auto h = ctx->limit_y; + sk_unaligned_store(ctx->mask, cond_to_mask_16((0 <= y) & (y < h))); +} +STAGE_GG(decal_x_and_y, SkRasterPipeline_DecalTileCtx* ctx) { + auto w = ctx->limit_x; + auto h = ctx->limit_y; + sk_unaligned_store(ctx->mask, cond_to_mask_16((0 <= x) & (x < w) & (0 <= y) & (y < h))); +} +STAGE_GG(clamp_x_and_y, SkRasterPipeline_CoordClampCtx* ctx) { + x = min(ctx->max_x, max(ctx->min_x, x)); + y = min(ctx->max_y, max(ctx->min_y, y)); +} +STAGE_PP(check_decal_mask, SkRasterPipeline_DecalTileCtx* ctx) { + auto mask = sk_unaligned_load(ctx->mask); + r = r & mask; + g = g & mask; + b = b & mask; + a = a & mask; +} + +SI void round_F_to_U16(F R, F G, F B, F A, U16* r, U16* g, U16* b, U16* a) { + auto round = [](F x) { return cast(x * 255.0f + 0.5f); }; + + *r = round(min(max(0, R), 1)); + *g = round(min(max(0, G), 1)); + *b = round(min(max(0, B), 1)); + *a = round(A); // we assume alpha is already in [0,1]. +} + +SI void gradient_lookup(const SkRasterPipeline_GradientCtx* c, U32 idx, F t, + U16* r, U16* g, U16* b, U16* a) { + + F fr, fg, fb, fa, br, bg, bb, ba; +#if defined(JUMPER_IS_HSW) || defined(JUMPER_IS_SKX) + if (c->stopCount <=8) { + __m256i lo, hi; + split(idx, &lo, &hi); + + fr = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[0]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[0]), hi)); + br = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[0]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[0]), hi)); + fg = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[1]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[1]), hi)); + bg = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[1]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[1]), hi)); + fb = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[2]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[2]), hi)); + bb = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[2]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[2]), hi)); + fa = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[3]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->fs[3]), hi)); + ba = join(_mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[3]), lo), + _mm256_permutevar8x32_ps(_mm256_loadu_ps(c->bs[3]), hi)); + } else +#endif + { + fr = gather(c->fs[0], idx); + fg = gather(c->fs[1], idx); + fb = gather(c->fs[2], idx); + fa = gather(c->fs[3], idx); + br = gather(c->bs[0], idx); + bg = gather(c->bs[1], idx); + bb = gather(c->bs[2], idx); + ba = gather(c->bs[3], idx); + } + round_F_to_U16(mad(t, fr, br), + mad(t, fg, bg), + mad(t, fb, bb), + mad(t, fa, ba), + r,g,b,a); +} + +STAGE_GP(gradient, const SkRasterPipeline_GradientCtx* c) { + auto t = x; + U32 idx = 0; + + // N.B. The loop starts at 1 because idx 0 is the color to use before the first stop. + for (size_t i = 1; i < c->stopCount; i++) { + idx += if_then_else(t >= c->ts[i], U32(1), U32(0)); + } + + gradient_lookup(c, idx, t, &r, &g, &b, &a); +} + +STAGE_GP(evenly_spaced_gradient, const SkRasterPipeline_GradientCtx* c) { + auto t = x; + auto idx = trunc_(t * (c->stopCount-1)); + gradient_lookup(c, idx, t, &r, &g, &b, &a); +} + +STAGE_GP(evenly_spaced_2_stop_gradient, const SkRasterPipeline_EvenlySpaced2StopGradientCtx* c) { + auto t = x; + round_F_to_U16(mad(t, c->f[0], c->b[0]), + mad(t, c->f[1], c->b[1]), + mad(t, c->f[2], c->b[2]), + mad(t, c->f[3], c->b[3]), + &r,&g,&b,&a); +} + +STAGE_GP(bilerp_clamp_8888, const SkRasterPipeline_GatherCtx* ctx) { + // Quantize sample point and transform into lerp coordinates converting them to 16.16 fixed + // point number. + I32 qx = cast(floor_(65536.0f * x + 0.5f)) - 32768, + qy = cast(floor_(65536.0f * y + 0.5f)) - 32768; + + // Calculate screen coordinates sx & sy by flooring qx and qy. + I32 sx = qx >> 16, + sy = qy >> 16; + + // We are going to perform a change of parameters for qx on [0, 1) to tx on [-1, 1). + // This will put tx in Q15 format for use with q_mult. + // Calculate tx and ty on the interval of [-1, 1). Give {qx} and {qy} are on the interval + // [0, 1), where {v} is fract(v), we can transform to tx in the following manner ty follows + // the same math: + // tx = 2 * {qx} - 1, so + // {qx} = (tx + 1) / 2. + // Calculate {qx} - 1 and {qy} - 1 where the {} operation is handled by the cast, and the - 1 + // is handled by the ^ 0x8000, dividing by 2 is deferred and handled in lerpX and lerpY in + // order to use the full 16-bit resolution. + I16 tx = cast(qx ^ 0x8000), + ty = cast(qy ^ 0x8000); + + // Substituting the {qx} by the equation for tx from above into the lerp equation where v is + // the lerped value: + // v = {qx}*(R - L) + L, + // v = 1/2*(tx + 1)*(R - L) + L + // 2 * v = (tx + 1)*(R - L) + 2*L + // = tx*R - tx*L + R - L + 2*L + // = tx*(R - L) + (R + L). + // Since R and L are on [0, 255] we need them on the interval [0, 1/2] to get them into form + // for Q15_mult. If L and R where in 16.16 format, this would be done by dividing by 2^9. In + // code, we can multiply by 2^7 to get the value directly. + // 2 * v = tx*(R - L) + (R + L) + // 2^-9 * 2 * v = tx*(R - L)*2^-9 + (R + L)*2^-9 + // 2^-8 * v = 2^-9 * (tx*(R - L) + (R + L)) + // v = 1/2 * (tx*(R - L) + (R + L)) + auto lerpX = [&](U16 left, U16 right) -> U16 { + I16 width = cast(right - left) << 7; + U16 middle = (right + left) << 7; + // The constrained_add is the most subtle part of lerp. The first term is on the interval + // [-1, 1), and the second term is on the interval is on the interval [0, 1) because + // both terms are too high by a factor of 2 which will be handled below. (Both R and L are + // on [0, 1/2), but the sum R + L is on the interval [0, 1).) Generally, the sum below + // should overflow, but because we know that sum produces an output on the + // interval [0, 1) we know that the extra bit that would be needed will always be 0. So + // we need to be careful to treat this sum as an unsigned positive number in the divide + // by 2 below. Add +1 for rounding. + U16 v2 = constrained_add(scaled_mult(tx, width), middle) + 1; + // Divide by 2 to calculate v and at the same time bring the intermediate value onto the + // interval [0, 1/2] to set up for the lerpY. + return v2 >> 1; + }; + + const uint32_t* ptr; + U32 ix = ix_and_ptr(&ptr, ctx, sx, sy); + U16 leftR, leftG, leftB, leftA; + from_8888(gather(ptr, ix), &leftR,&leftG,&leftB,&leftA); + + ix = ix_and_ptr(&ptr, ctx, sx+1, sy); + U16 rightR, rightG, rightB, rightA; + from_8888(gather(ptr, ix), &rightR,&rightG,&rightB,&rightA); + + U16 topR = lerpX(leftR, rightR), + topG = lerpX(leftG, rightG), + topB = lerpX(leftB, rightB), + topA = lerpX(leftA, rightA); + + ix = ix_and_ptr(&ptr, ctx, sx, sy+1); + from_8888(gather(ptr, ix), &leftR,&leftG,&leftB,&leftA); + + ix = ix_and_ptr(&ptr, ctx, sx+1, sy+1); + from_8888(gather(ptr, ix), &rightR,&rightG,&rightB,&rightA); + + U16 bottomR = lerpX(leftR, rightR), + bottomG = lerpX(leftG, rightG), + bottomB = lerpX(leftB, rightB), + bottomA = lerpX(leftA, rightA); + + // lerpY plays the same mathematical tricks as lerpX, but the final divide is by 256 resulting + // in a value on [0, 255]. + auto lerpY = [&](U16 top, U16 bottom) -> U16 { + I16 width = cast(bottom - top); + U16 middle = bottom + top; + // Add + 0x80 for rounding. + U16 blend = constrained_add(scaled_mult(ty, width), middle) + 0x80; + + return blend >> 8; + }; + + r = lerpY(topR, bottomR); + g = lerpY(topG, bottomG); + b = lerpY(topB, bottomB); + a = lerpY(topA, bottomA); +} + +STAGE_GG(xy_to_unit_angle, NoCtx) { + F xabs = abs_(x), + yabs = abs_(y); + + F slope = min(xabs, yabs)/max(xabs, yabs); + F s = slope * slope; + + // Use a 7th degree polynomial to approximate atan. + // This was generated using sollya.gforge.inria.fr. + // A float optimized polynomial was generated using the following command. + // P1 = fpminimax((1/(2*Pi))*atan(x),[|1,3,5,7|],[|24...|],[2^(-40),1],relative); + F phi = slope + * (0.15912117063999176025390625f + s + * (-5.185396969318389892578125e-2f + s + * (2.476101927459239959716796875e-2f + s + * (-7.0547382347285747528076171875e-3f)))); + + phi = if_then_else(xabs < yabs, 1.0f/4.0f - phi, phi); + phi = if_then_else(x < 0.0f , 1.0f/2.0f - phi, phi); + phi = if_then_else(y < 0.0f , 1.0f - phi , phi); + phi = if_then_else(phi != phi , F(0) , phi); // Check for NaN. + x = phi; +} +STAGE_GG(xy_to_radius, NoCtx) { + x = sqrt_(x*x + y*y); +} + +// ~~~~~~ Compound stages ~~~~~~ // + +STAGE_PP(srcover_rgba_8888, const SkRasterPipeline_MemoryCtx* ctx) { + auto ptr = ptr_at_xy(ctx, dx,dy); + + load_8888_(ptr, tail, &dr,&dg,&db,&da); + r = r + div255( dr*inv(a) ); + g = g + div255( dg*inv(a) ); + b = b + div255( db*inv(a) ); + a = a + div255( da*inv(a) ); + store_8888_(ptr, tail, r,g,b,a); +} + +// ~~~~~~ skgpu::Swizzle stage ~~~~~~ // + +STAGE_PP(swizzle, void* ctx) { + auto ir = r, ig = g, ib = b, ia = a; + U16* o[] = {&r, &g, &b, &a}; + char swiz[4]; + memcpy(swiz, &ctx, sizeof(swiz)); + + for (int i = 0; i < 4; ++i) { + switch (swiz[i]) { + case 'r': *o[i] = ir; break; + case 'g': *o[i] = ig; break; + case 'b': *o[i] = ib; break; + case 'a': *o[i] = ia; break; + case '0': *o[i] = U16(0); break; + case '1': *o[i] = U16(255); break; + default: break; + } + } +} + +#undef cast + +#endif//defined(JUMPER_IS_SCALAR) controlling whether we build lowp stages +} // namespace lowp + +/* This gives us SK_OPTS::lowp::N if lowp::N has been set, or SK_OPTS::N if it hasn't. */ +namespace lowp { static constexpr size_t lowp_N = N; } + +/** Allow outside code to access the Raster Pipeline pixel stride. */ +constexpr size_t raster_pipeline_lowp_stride() { return lowp::lowp_N; } +constexpr size_t raster_pipeline_highp_stride() { return N; } + +} // namespace SK_OPTS_NS + +#undef SI + +#endif//SkRasterPipeline_opts_DEFINED diff --git a/gfx/skia/skia/src/opts/SkSwizzler_opts.h b/gfx/skia/skia/src/opts/SkSwizzler_opts.h new file mode 100644 index 0000000000..1c7b3833e9 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkSwizzler_opts.h @@ -0,0 +1,1389 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSwizzler_opts_DEFINED +#define SkSwizzler_opts_DEFINED + +#include "include/private/SkColorData.h" +#include "src/base/SkVx.h" +#include + +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 + #include +#elif defined(SK_ARM_HAS_NEON) + #include +#endif + +namespace SK_OPTS_NS { + +static void RGBA_to_rgbA_portable(uint32_t* dst, const uint32_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t a = (src[i] >> 24) & 0xFF, + b = (src[i] >> 16) & 0xFF, + g = (src[i] >> 8) & 0xFF, + r = (src[i] >> 0) & 0xFF; + b = (b*a+127)/255; + g = (g*a+127)/255; + r = (r*a+127)/255; + dst[i] = (uint32_t)a << 24 + | (uint32_t)b << 16 + | (uint32_t)g << 8 + | (uint32_t)r << 0; + } +} + +static void RGBA_to_bgrA_portable(uint32_t* dst, const uint32_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t a = (src[i] >> 24) & 0xFF, + b = (src[i] >> 16) & 0xFF, + g = (src[i] >> 8) & 0xFF, + r = (src[i] >> 0) & 0xFF; + b = (b*a+127)/255; + g = (g*a+127)/255; + r = (r*a+127)/255; + dst[i] = (uint32_t)a << 24 + | (uint32_t)r << 16 + | (uint32_t)g << 8 + | (uint32_t)b << 0; + } +} + +static void RGBA_to_BGRA_portable(uint32_t* dst, const uint32_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t a = (src[i] >> 24) & 0xFF, + b = (src[i] >> 16) & 0xFF, + g = (src[i] >> 8) & 0xFF, + r = (src[i] >> 0) & 0xFF; + dst[i] = (uint32_t)a << 24 + | (uint32_t)r << 16 + | (uint32_t)g << 8 + | (uint32_t)b << 0; + } +} + +static void grayA_to_RGBA_portable(uint32_t dst[], const uint8_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t g = src[0], + a = src[1]; + src += 2; + dst[i] = (uint32_t)a << 24 + | (uint32_t)g << 16 + | (uint32_t)g << 8 + | (uint32_t)g << 0; + } +} + +static void grayA_to_rgbA_portable(uint32_t dst[], const uint8_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t g = src[0], + a = src[1]; + src += 2; + g = (g*a+127)/255; + dst[i] = (uint32_t)a << 24 + | (uint32_t)g << 16 + | (uint32_t)g << 8 + | (uint32_t)g << 0; + } +} + +static void inverted_CMYK_to_RGB1_portable(uint32_t* dst, const uint32_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t k = (src[i] >> 24) & 0xFF, + y = (src[i] >> 16) & 0xFF, + m = (src[i] >> 8) & 0xFF, + c = (src[i] >> 0) & 0xFF; + // See comments in SkSwizzler.cpp for details on the conversion formula. + uint8_t b = (y*k+127)/255, + g = (m*k+127)/255, + r = (c*k+127)/255; + dst[i] = (uint32_t)0xFF << 24 + | (uint32_t) b << 16 + | (uint32_t) g << 8 + | (uint32_t) r << 0; + } +} + +static void inverted_CMYK_to_BGR1_portable(uint32_t* dst, const uint32_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t k = (src[i] >> 24) & 0xFF, + y = (src[i] >> 16) & 0xFF, + m = (src[i] >> 8) & 0xFF, + c = (src[i] >> 0) & 0xFF; + uint8_t b = (y*k+127)/255, + g = (m*k+127)/255, + r = (c*k+127)/255; + dst[i] = (uint32_t)0xFF << 24 + | (uint32_t) r << 16 + | (uint32_t) g << 8 + | (uint32_t) b << 0; + } +} + +#if defined(SK_ARM_HAS_NEON) + +// Rounded divide by 255, (x + 127) / 255 +static uint8x8_t div255_round(uint16x8_t x) { + // result = (x + 127) / 255 + // result = (x + 127) / 256 + error1 + // + // error1 = (x + 127) / (255 * 256) + // error1 = (x + 127) / (256 * 256) + error2 + // + // error2 = (x + 127) / (255 * 256 * 256) + // + // The maximum value of error2 is too small to matter. Thus: + // result = (x + 127) / 256 + (x + 127) / (256 * 256) + // result = ((x + 127) / 256 + x + 127) / 256 + // result = ((x + 127) >> 8 + x + 127) >> 8 + // + // Use >>> to represent "rounded right shift" which, conveniently, + // NEON supports in one instruction. + // result = ((x >>> 8) + x) >>> 8 + // + // Note that the second right shift is actually performed as an + // "add, round, and narrow back to 8-bits" instruction. + return vraddhn_u16(x, vrshrq_n_u16(x, 8)); +} + +// Scale a byte by another, (x * y + 127) / 255 +static uint8x8_t scale(uint8x8_t x, uint8x8_t y) { + return div255_round(vmull_u8(x, y)); +} + +static void premul_should_swapRB(bool kSwapRB, uint32_t* dst, const uint32_t* src, int count) { + while (count >= 8) { + // Load 8 pixels. + uint8x8x4_t rgba = vld4_u8((const uint8_t*) src); + + uint8x8_t a = rgba.val[3], + b = rgba.val[2], + g = rgba.val[1], + r = rgba.val[0]; + + // Premultiply. + b = scale(b, a); + g = scale(g, a); + r = scale(r, a); + + // Store 8 premultiplied pixels. + if (kSwapRB) { + rgba.val[2] = r; + rgba.val[1] = g; + rgba.val[0] = b; + } else { + rgba.val[2] = b; + rgba.val[1] = g; + rgba.val[0] = r; + } + vst4_u8((uint8_t*) dst, rgba); + src += 8; + dst += 8; + count -= 8; + } + + // Call portable code to finish up the tail of [0,8) pixels. + auto proc = kSwapRB ? RGBA_to_bgrA_portable : RGBA_to_rgbA_portable; + proc(dst, src, count); +} + +/*not static*/ inline void RGBA_to_rgbA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(false, dst, src, count); +} + +/*not static*/ inline void RGBA_to_bgrA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(true, dst, src, count); +} + +/*not static*/ inline void RGBA_to_BGRA(uint32_t* dst, const uint32_t* src, int count) { + using std::swap; + while (count >= 16) { + // Load 16 pixels. + uint8x16x4_t rgba = vld4q_u8((const uint8_t*) src); + + // Swap r and b. + swap(rgba.val[0], rgba.val[2]); + + // Store 16 pixels. + vst4q_u8((uint8_t*) dst, rgba); + src += 16; + dst += 16; + count -= 16; + } + + if (count >= 8) { + // Load 8 pixels. + uint8x8x4_t rgba = vld4_u8((const uint8_t*) src); + + // Swap r and b. + swap(rgba.val[0], rgba.val[2]); + + // Store 8 pixels. + vst4_u8((uint8_t*) dst, rgba); + src += 8; + dst += 8; + count -= 8; + } + + RGBA_to_BGRA_portable(dst, src, count); +} + +static void expand_grayA(bool kPremul, uint32_t dst[], const uint8_t* src, int count) { + while (count >= 16) { + // Load 16 pixels. + uint8x16x2_t ga = vld2q_u8(src); + + // Premultiply if requested. + if (kPremul) { + ga.val[0] = vcombine_u8( + scale(vget_low_u8(ga.val[0]), vget_low_u8(ga.val[1])), + scale(vget_high_u8(ga.val[0]), vget_high_u8(ga.val[1]))); + } + + // Set each of the color channels. + uint8x16x4_t rgba; + rgba.val[0] = ga.val[0]; + rgba.val[1] = ga.val[0]; + rgba.val[2] = ga.val[0]; + rgba.val[3] = ga.val[1]; + + // Store 16 pixels. + vst4q_u8((uint8_t*) dst, rgba); + src += 16*2; + dst += 16; + count -= 16; + } + + if (count >= 8) { + // Load 8 pixels. + uint8x8x2_t ga = vld2_u8(src); + + // Premultiply if requested. + if (kPremul) { + ga.val[0] = scale(ga.val[0], ga.val[1]); + } + + // Set each of the color channels. + uint8x8x4_t rgba; + rgba.val[0] = ga.val[0]; + rgba.val[1] = ga.val[0]; + rgba.val[2] = ga.val[0]; + rgba.val[3] = ga.val[1]; + + // Store 8 pixels. + vst4_u8((uint8_t*) dst, rgba); + src += 8*2; + dst += 8; + count -= 8; + } + + auto proc = kPremul ? grayA_to_rgbA_portable : grayA_to_RGBA_portable; + proc(dst, src, count); +} + +/*not static*/ inline void grayA_to_RGBA(uint32_t dst[], const uint8_t* src, int count) { + expand_grayA(false, dst, src, count); +} + +/*not static*/ inline void grayA_to_rgbA(uint32_t dst[], const uint8_t* src, int count) { + expand_grayA(true, dst, src, count); +} + +enum Format { kRGB1, kBGR1 }; +static void inverted_cmyk_to(Format format, uint32_t* dst, const uint32_t* src, int count) { + while (count >= 8) { + // Load 8 cmyk pixels. + uint8x8x4_t pixels = vld4_u8((const uint8_t*) src); + + uint8x8_t k = pixels.val[3], + y = pixels.val[2], + m = pixels.val[1], + c = pixels.val[0]; + + // Scale to r, g, b. + uint8x8_t b = scale(y, k); + uint8x8_t g = scale(m, k); + uint8x8_t r = scale(c, k); + + // Store 8 rgba pixels. + if (kBGR1 == format) { + pixels.val[3] = vdup_n_u8(0xFF); + pixels.val[2] = r; + pixels.val[1] = g; + pixels.val[0] = b; + } else { + pixels.val[3] = vdup_n_u8(0xFF); + pixels.val[2] = b; + pixels.val[1] = g; + pixels.val[0] = r; + } + vst4_u8((uint8_t*) dst, pixels); + src += 8; + dst += 8; + count -= 8; + } + + auto proc = (kBGR1 == format) ? inverted_CMYK_to_BGR1_portable : inverted_CMYK_to_RGB1_portable; + proc(dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_RGB1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kRGB1, dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_BGR1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kBGR1, dst, src, count); +} + +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SKX +// Scale a byte by another. +// Inputs are stored in 16-bit lanes, but are not larger than 8-bits. +static __m512i scale(__m512i x, __m512i y) { + const __m512i _128 = _mm512_set1_epi16(128); + const __m512i _257 = _mm512_set1_epi16(257); + + // (x+127)/255 == ((x+128)*257)>>16 for 0 <= x <= 255*255. + return _mm512_mulhi_epu16(_mm512_add_epi16(_mm512_mullo_epi16(x, y), _128), _257); +} + +static void premul_should_swapRB(bool kSwapRB, uint32_t* dst, const uint32_t* src, int count) { + + auto premul8 = [=](__m512i* lo, __m512i* hi) { + const __m512i zeros = _mm512_setzero_si512(); + skvx::Vec<64, uint8_t> mask; + if (kSwapRB) { + mask = { 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15 }; + } else { + mask = { 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15 }; + } + __m512i planar = skvx::bit_pun<__m512i>(mask); + + // Swizzle the pixels to 8-bit planar. + *lo = _mm512_shuffle_epi8(*lo, planar); + *hi = _mm512_shuffle_epi8(*hi, planar); + __m512i rg = _mm512_unpacklo_epi32(*lo, *hi), + ba = _mm512_unpackhi_epi32(*lo, *hi); + + // Unpack to 16-bit planar. + __m512i r = _mm512_unpacklo_epi8(rg, zeros), + g = _mm512_unpackhi_epi8(rg, zeros), + b = _mm512_unpacklo_epi8(ba, zeros), + a = _mm512_unpackhi_epi8(ba, zeros); + + // Premultiply! + r = scale(r, a); + g = scale(g, a); + b = scale(b, a); + + // Repack into interlaced pixels. + rg = _mm512_or_si512(r, _mm512_slli_epi16(g, 8)); + ba = _mm512_or_si512(b, _mm512_slli_epi16(a, 8)); + *lo = _mm512_unpacklo_epi16(rg, ba); + *hi = _mm512_unpackhi_epi16(rg, ba); + }; + + while (count >= 32) { + __m512i lo = _mm512_loadu_si512((const __m512i*) (src + 0)), + hi = _mm512_loadu_si512((const __m512i*) (src + 16)); + + premul8(&lo, &hi); + + _mm512_storeu_si512((__m512i*) (dst + 0), lo); + _mm512_storeu_si512((__m512i*) (dst + 16), hi); + + src += 32; + dst += 32; + count -= 32; + } + + if (count >= 16) { + __m512i lo = _mm512_loadu_si512((const __m512i*) src), + hi = _mm512_setzero_si512(); + + premul8(&lo, &hi); + + _mm512_storeu_si512((__m512i*) dst, lo); + + src += 16; + dst += 16; + count -= 16; + } + + // Call portable code to finish up the tail of [0,16) pixels. + auto proc = kSwapRB ? RGBA_to_bgrA_portable : RGBA_to_rgbA_portable; + proc(dst, src, count); +} + +/*not static*/ inline void RGBA_to_rgbA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(false, dst, src, count); +} + +/*not static*/ inline void RGBA_to_bgrA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(true, dst, src, count); +} + +/*not static*/ inline void RGBA_to_BGRA(uint32_t* dst, const uint32_t* src, int count) { + const uint8_t mask[64] = { 2,1,0,3, 6,5,4,7, 10,9,8,11, 14,13,12,15, + 2,1,0,3, 6,5,4,7, 10,9,8,11, 14,13,12,15, + 2,1,0,3, 6,5,4,7, 10,9,8,11, 14,13,12,15, + 2,1,0,3, 6,5,4,7, 10,9,8,11, 14,13,12,15 }; + const __m512i swapRB = _mm512_loadu_si512(mask); + + while (count >= 16) { + __m512i rgba = _mm512_loadu_si512((const __m512i*) src); + __m512i bgra = _mm512_shuffle_epi8(rgba, swapRB); + _mm512_storeu_si512((__m512i*) dst, bgra); + + src += 16; + dst += 16; + count -= 16; + } + + RGBA_to_BGRA_portable(dst, src, count); +} + +// Use SSSE3 impl as AVX2 / AVX-512 impl regresses performance for RGB_to_RGB1 / RGB_to_BGR1. + +// Use AVX2 impl as AVX-512 impl regresses performance for gray_to_RGB1. + +/*not static*/ inline void grayA_to_RGBA(uint32_t dst[], const uint8_t* src, int count) { + while (count >= 32) { + __m512i ga = _mm512_loadu_si512((const __m512i*) src); + + __m512i gg = _mm512_or_si512(_mm512_and_si512(ga, _mm512_set1_epi16(0x00FF)), + _mm512_slli_epi16(ga, 8)); + + __m512i ggga_lo = _mm512_unpacklo_epi16(gg, ga); + __m512i ggga_hi = _mm512_unpackhi_epi16(gg, ga); + + // 1st shuffle for pixel reorder. + // Note. 'p' stands for 'ggga' + // Before 1st shuffle: + // ggga_lo = p0 p1 p2 p3 | p8 p9 p10 p11 | p16 p17 p18 p19 | p24 p25 p26 p27 + // ggga_hi = p4 p5 p6 p7 | p12 p13 p14 p15 | p20 p21 p22 p23 | p28 p29 p30 p31 + // + // After 1st shuffle: + // ggga_lo_shuffle_1 = + // p0 p1 p2 p3 | p8 p9 p10 p11 | p4 p5 p6 p7 | p12 p13 p14 p15 + // ggga_hi_shuffle_1 = + // p16 p17 p18 p19 | p24 p25 p26 p27 | p20 p21 p22 p23 | p28 p29 p30 p31 + __m512i ggga_lo_shuffle_1 = _mm512_shuffle_i32x4(ggga_lo, ggga_hi, 0x44), + ggga_hi_shuffle_1 = _mm512_shuffle_i32x4(ggga_lo, ggga_hi, 0xee); + + // 2nd shuffle for pixel reorder. + // After the 2nd shuffle: + // ggga_lo_shuffle_2 = + // p0 p1 p2 p3 | p4 p5 p6 p7 | p8 p9 p10 p11 | p12 p13 p14 p15 + // ggga_hi_shuffle_2 = + // p16 p17 p18 p19 | p20 p21 p22 p23 | p24 p25 p26 p27 | p28 p29 p30 p31 + __m512i ggga_lo_shuffle_2 = _mm512_shuffle_i32x4(ggga_lo_shuffle_1, + ggga_lo_shuffle_1, 0xd8), + ggga_hi_shuffle_2 = _mm512_shuffle_i32x4(ggga_hi_shuffle_1, + ggga_hi_shuffle_1, 0xd8); + + _mm512_storeu_si512((__m512i*) (dst + 0), ggga_lo_shuffle_2); + _mm512_storeu_si512((__m512i*) (dst + 16), ggga_hi_shuffle_2); + + src += 32*2; + dst += 32; + count -= 32; + } + + grayA_to_RGBA_portable(dst, src, count); +} + +/*not static*/ inline void grayA_to_rgbA(uint32_t dst[], const uint8_t* src, int count) { + while (count >= 32) { + __m512i grayA = _mm512_loadu_si512((const __m512i*) src); + + __m512i g0 = _mm512_and_si512(grayA, _mm512_set1_epi16(0x00FF)); + __m512i a0 = _mm512_srli_epi16(grayA, 8); + + // Premultiply + g0 = scale(g0, a0); + + __m512i gg = _mm512_or_si512(g0, _mm512_slli_epi16(g0, 8)); + __m512i ga = _mm512_or_si512(g0, _mm512_slli_epi16(a0, 8)); + + __m512i ggga_lo = _mm512_unpacklo_epi16(gg, ga); + __m512i ggga_hi = _mm512_unpackhi_epi16(gg, ga); + + // 1st shuffle for pixel reorder, same as grayA_to_RGBA. + __m512i ggga_lo_shuffle_1 = _mm512_shuffle_i32x4(ggga_lo, ggga_hi, 0x44), + ggga_hi_shuffle_1 = _mm512_shuffle_i32x4(ggga_lo, ggga_hi, 0xee); + + // 2nd shuffle for pixel reorder, same as grayA_to_RGBA. + __m512i ggga_lo_shuffle_2 = _mm512_shuffle_i32x4(ggga_lo_shuffle_1, + ggga_lo_shuffle_1, 0xd8), + ggga_hi_shuffle_2 = _mm512_shuffle_i32x4(ggga_hi_shuffle_1, + ggga_hi_shuffle_1, 0xd8); + + _mm512_storeu_si512((__m512i*) (dst + 0), ggga_lo_shuffle_2); + _mm512_storeu_si512((__m512i*) (dst + 16), ggga_hi_shuffle_2); + + src += 32*2; + dst += 32; + count -= 32; + } + + grayA_to_rgbA_portable(dst, src, count); +} + +enum Format { kRGB1, kBGR1 }; +static void inverted_cmyk_to(Format format, uint32_t* dst, const uint32_t* src, int count) { + auto convert8 = [=](__m512i* lo, __m512i* hi) { + const __m512i zeros = _mm512_setzero_si512(); + skvx::Vec<64, uint8_t> mask; + if (kBGR1 == format) { + mask = { 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15 }; + } else { + mask = { 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15 }; + } + __m512i planar = skvx::bit_pun<__m512i>(mask); + + // Swizzle the pixels to 8-bit planar. + *lo = _mm512_shuffle_epi8(*lo, planar); + *hi = _mm512_shuffle_epi8(*hi, planar); + __m512i cm = _mm512_unpacklo_epi32(*lo, *hi), + yk = _mm512_unpackhi_epi32(*lo, *hi); + + // Unpack to 16-bit planar. + __m512i c = _mm512_unpacklo_epi8(cm, zeros), + m = _mm512_unpackhi_epi8(cm, zeros), + y = _mm512_unpacklo_epi8(yk, zeros), + k = _mm512_unpackhi_epi8(yk, zeros); + + // Scale to r, g, b. + __m512i r = scale(c, k), + g = scale(m, k), + b = scale(y, k); + + // Repack into interlaced pixels. + __m512i rg = _mm512_or_si512(r, _mm512_slli_epi16(g, 8)), + ba = _mm512_or_si512(b, _mm512_set1_epi16((uint16_t) 0xFF00)); + *lo = _mm512_unpacklo_epi16(rg, ba); + *hi = _mm512_unpackhi_epi16(rg, ba); + }; + + while (count >= 32) { + __m512i lo = _mm512_loadu_si512((const __m512i*) (src + 0)), + hi = _mm512_loadu_si512((const __m512i*) (src + 16)); + + convert8(&lo, &hi); + + _mm512_storeu_si512((__m512i*) (dst + 0), lo); + _mm512_storeu_si512((__m512i*) (dst + 16), hi); + + src += 32; + dst += 32; + count -= 32; + } + + if (count >= 16) { + __m512i lo = _mm512_loadu_si512((const __m512i*) src), + hi = _mm512_setzero_si512(); + + convert8(&lo, &hi); + + _mm512_storeu_si512((__m512i*) dst, lo); + + src += 16; + dst += 16; + count -= 16; + } + + auto proc = (kBGR1 == format) ? inverted_CMYK_to_BGR1_portable : inverted_CMYK_to_RGB1_portable; + proc(dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_RGB1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kRGB1, dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_BGR1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kBGR1, dst, src, count); +} + +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + +// Scale a byte by another. +// Inputs are stored in 16-bit lanes, but are not larger than 8-bits. +static __m256i scale(__m256i x, __m256i y) { + const __m256i _128 = _mm256_set1_epi16(128); + const __m256i _257 = _mm256_set1_epi16(257); + + // (x+127)/255 == ((x+128)*257)>>16 for 0 <= x <= 255*255. + return _mm256_mulhi_epu16(_mm256_add_epi16(_mm256_mullo_epi16(x, y), _128), _257); +} + +static void premul_should_swapRB(bool kSwapRB, uint32_t* dst, const uint32_t* src, int count) { + + auto premul8 = [=](__m256i* lo, __m256i* hi) { + const __m256i zeros = _mm256_setzero_si256(); + __m256i planar; + if (kSwapRB) { + planar = _mm256_setr_epi8(2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15); + } else { + planar = _mm256_setr_epi8(0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15); + } + + // Swizzle the pixels to 8-bit planar. + *lo = _mm256_shuffle_epi8(*lo, planar); // rrrrgggg bbbbaaaa rrrrgggg bbbbaaaa + *hi = _mm256_shuffle_epi8(*hi, planar); // RRRRGGGG BBBBAAAA RRRRGGGG BBBBAAAA + __m256i rg = _mm256_unpacklo_epi32(*lo, *hi), // rrrrRRRR ggggGGGG rrrrRRRR ggggGGGG + ba = _mm256_unpackhi_epi32(*lo, *hi); // bbbbBBBB aaaaAAAA bbbbBBBB aaaaAAAA + + // Unpack to 16-bit planar. + __m256i r = _mm256_unpacklo_epi8(rg, zeros), // r_r_r_r_ R_R_R_R_ r_r_r_r_ R_R_R_R_ + g = _mm256_unpackhi_epi8(rg, zeros), // g_g_g_g_ G_G_G_G_ g_g_g_g_ G_G_G_G_ + b = _mm256_unpacklo_epi8(ba, zeros), // b_b_b_b_ B_B_B_B_ b_b_b_b_ B_B_B_B_ + a = _mm256_unpackhi_epi8(ba, zeros); // a_a_a_a_ A_A_A_A_ a_a_a_a_ A_A_A_A_ + + // Premultiply! + r = scale(r, a); + g = scale(g, a); + b = scale(b, a); + + // Repack into interlaced pixels. + rg = _mm256_or_si256(r, _mm256_slli_epi16(g, 8)); // rgrgrgrg RGRGRGRG rgrgrgrg RGRGRGRG + ba = _mm256_or_si256(b, _mm256_slli_epi16(a, 8)); // babababa BABABABA babababa BABABABA + *lo = _mm256_unpacklo_epi16(rg, ba); // rgbargba rgbargba rgbargba rgbargba + *hi = _mm256_unpackhi_epi16(rg, ba); // RGBARGBA RGBARGBA RGBARGBA RGBARGBA + }; + + while (count >= 16) { + __m256i lo = _mm256_loadu_si256((const __m256i*) (src + 0)), + hi = _mm256_loadu_si256((const __m256i*) (src + 8)); + + premul8(&lo, &hi); + + _mm256_storeu_si256((__m256i*) (dst + 0), lo); + _mm256_storeu_si256((__m256i*) (dst + 8), hi); + + src += 16; + dst += 16; + count -= 16; + } + + if (count >= 8) { + __m256i lo = _mm256_loadu_si256((const __m256i*) src), + hi = _mm256_setzero_si256(); + + premul8(&lo, &hi); + + _mm256_storeu_si256((__m256i*) dst, lo); + + src += 8; + dst += 8; + count -= 8; + } + + // Call portable code to finish up the tail of [0,8) pixels. + auto proc = kSwapRB ? RGBA_to_bgrA_portable : RGBA_to_rgbA_portable; + proc(dst, src, count); +} + +/*not static*/ inline void RGBA_to_rgbA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(false, dst, src, count); +} + +/*not static*/ inline void RGBA_to_bgrA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(true, dst, src, count); +} + +/*not static*/ inline void RGBA_to_BGRA(uint32_t* dst, const uint32_t* src, int count) { + const __m256i swapRB = _mm256_setr_epi8(2,1,0,3, 6,5,4,7, 10,9,8,11, 14,13,12,15, + 2,1,0,3, 6,5,4,7, 10,9,8,11, 14,13,12,15); + + while (count >= 8) { + __m256i rgba = _mm256_loadu_si256((const __m256i*) src); + __m256i bgra = _mm256_shuffle_epi8(rgba, swapRB); + _mm256_storeu_si256((__m256i*) dst, bgra); + + src += 8; + dst += 8; + count -= 8; + } + + RGBA_to_BGRA_portable(dst, src, count); +} + +/*not static*/ inline void grayA_to_RGBA(uint32_t dst[], const uint8_t* src, int count) { + while (count >= 16) { + __m256i ga = _mm256_loadu_si256((const __m256i*) src); + + __m256i gg = _mm256_or_si256(_mm256_and_si256(ga, _mm256_set1_epi16(0x00FF)), + _mm256_slli_epi16(ga, 8)); + + __m256i ggga_lo = _mm256_unpacklo_epi16(gg, ga); + __m256i ggga_hi = _mm256_unpackhi_epi16(gg, ga); + + // Shuffle for pixel reorder + // Note. 'p' stands for 'ggga' + // Before shuffle: + // ggga_lo = p0 p1 p2 p3 | p8 p9 p10 p11 + // ggga_hi = p4 p5 p6 p7 | p12 p13 p14 p15 + // + // After shuffle: + // ggga_lo_shuffle = p0 p1 p2 p3 | p4 p5 p6 p7 + // ggga_hi_shuffle = p8 p9 p10 p11 | p12 p13 p14 p15 + __m256i ggga_lo_shuffle = _mm256_permute2x128_si256(ggga_lo, ggga_hi, 0x20), + ggga_hi_shuffle = _mm256_permute2x128_si256(ggga_lo, ggga_hi, 0x31); + + _mm256_storeu_si256((__m256i*) (dst + 0), ggga_lo_shuffle); + _mm256_storeu_si256((__m256i*) (dst + 8), ggga_hi_shuffle); + + src += 16*2; + dst += 16; + count -= 16; + } + + grayA_to_RGBA_portable(dst, src, count); +} + +/*not static*/ inline void grayA_to_rgbA(uint32_t dst[], const uint8_t* src, int count) { + while (count >= 16) { + __m256i grayA = _mm256_loadu_si256((const __m256i*) src); + + __m256i g0 = _mm256_and_si256(grayA, _mm256_set1_epi16(0x00FF)); + __m256i a0 = _mm256_srli_epi16(grayA, 8); + + // Premultiply + g0 = scale(g0, a0); + + __m256i gg = _mm256_or_si256(g0, _mm256_slli_epi16(g0, 8)); + __m256i ga = _mm256_or_si256(g0, _mm256_slli_epi16(a0, 8)); + + __m256i ggga_lo = _mm256_unpacklo_epi16(gg, ga); + __m256i ggga_hi = _mm256_unpackhi_epi16(gg, ga); + + // Shuffle for pixel reorder, similar as grayA_to_RGBA + __m256i ggga_lo_shuffle = _mm256_permute2x128_si256(ggga_lo, ggga_hi, 0x20), + ggga_hi_shuffle = _mm256_permute2x128_si256(ggga_lo, ggga_hi, 0x31); + + _mm256_storeu_si256((__m256i*) (dst + 0), ggga_lo_shuffle); + _mm256_storeu_si256((__m256i*) (dst + 8), ggga_hi_shuffle); + + src += 16*2; + dst += 16; + count -= 16; + } + + grayA_to_rgbA_portable(dst, src, count); +} + +enum Format { kRGB1, kBGR1 }; +static void inverted_cmyk_to(Format format, uint32_t* dst, const uint32_t* src, int count) { + auto convert8 = [=](__m256i* lo, __m256i* hi) { + const __m256i zeros = _mm256_setzero_si256(); + __m256i planar; + if (kBGR1 == format) { + planar = _mm256_setr_epi8(2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15, + 2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15); + } else { + planar = _mm256_setr_epi8(0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15, + 0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15); + } + + // Swizzle the pixels to 8-bit planar. + *lo = _mm256_shuffle_epi8(*lo, planar); // ccccmmmm yyyykkkk ccccmmmm yyyykkkk + *hi = _mm256_shuffle_epi8(*hi, planar); // CCCCMMMM YYYYKKKK CCCCMMMM YYYYKKKK + __m256i cm = _mm256_unpacklo_epi32(*lo, *hi), // ccccCCCC mmmmMMMM ccccCCCC mmmmMMMM + yk = _mm256_unpackhi_epi32(*lo, *hi); // yyyyYYYY kkkkKKKK yyyyYYYY kkkkKKKK + + // Unpack to 16-bit planar. + __m256i c = _mm256_unpacklo_epi8(cm, zeros), // c_c_c_c_ C_C_C_C_ c_c_c_c_ C_C_C_C_ + m = _mm256_unpackhi_epi8(cm, zeros), // m_m_m_m_ M_M_M_M_ m_m_m_m_ M_M_M_M_ + y = _mm256_unpacklo_epi8(yk, zeros), // y_y_y_y_ Y_Y_Y_Y_ y_y_y_y_ Y_Y_Y_Y_ + k = _mm256_unpackhi_epi8(yk, zeros); // k_k_k_k_ K_K_K_K_ k_k_k_k_ K_K_K_K_ + + // Scale to r, g, b. + __m256i r = scale(c, k), + g = scale(m, k), + b = scale(y, k); + + // Repack into interlaced pixels: + // rg = rgrgrgrg RGRGRGRG rgrgrgrg RGRGRGRG + // ba = b1b1b1b1 B1B1B1B1 b1b1b1b1 B1B1B1B1 + __m256i rg = _mm256_or_si256(r, _mm256_slli_epi16(g, 8)), + ba = _mm256_or_si256(b, _mm256_set1_epi16((uint16_t) 0xFF00)); + *lo = _mm256_unpacklo_epi16(rg, ba); // rgb1rgb1 rgb1rgb1 rgb1rgb1 rgb1rgb1 + *hi = _mm256_unpackhi_epi16(rg, ba); // RGB1RGB1 RGB1RGB1 RGB1RGB1 RGB1RGB1 + }; + + while (count >= 16) { + __m256i lo = _mm256_loadu_si256((const __m256i*) (src + 0)), + hi = _mm256_loadu_si256((const __m256i*) (src + 8)); + + convert8(&lo, &hi); + + _mm256_storeu_si256((__m256i*) (dst + 0), lo); + _mm256_storeu_si256((__m256i*) (dst + 8), hi); + + src += 16; + dst += 16; + count -= 16; + } + + if (count >= 8) { + __m256i lo = _mm256_loadu_si256((const __m256i*) src), + hi = _mm256_setzero_si256(); + + convert8(&lo, &hi); + + _mm256_storeu_si256((__m256i*) dst, lo); + + src += 8; + dst += 8; + count -= 8; + } + + auto proc = (kBGR1 == format) ? inverted_CMYK_to_BGR1_portable : inverted_CMYK_to_RGB1_portable; + proc(dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_RGB1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kRGB1, dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_BGR1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kBGR1, dst, src, count); +} + +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 + +// Scale a byte by another. +// Inputs are stored in 16-bit lanes, but are not larger than 8-bits. +static __m128i scale(__m128i x, __m128i y) { + const __m128i _128 = _mm_set1_epi16(128); + const __m128i _257 = _mm_set1_epi16(257); + + // (x+127)/255 == ((x+128)*257)>>16 for 0 <= x <= 255*255. + return _mm_mulhi_epu16(_mm_add_epi16(_mm_mullo_epi16(x, y), _128), _257); +} + +static void premul_should_swapRB(bool kSwapRB, uint32_t* dst, const uint32_t* src, int count) { + + auto premul8 = [=](__m128i* lo, __m128i* hi) { + const __m128i zeros = _mm_setzero_si128(); + __m128i planar; + if (kSwapRB) { + planar = _mm_setr_epi8(2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15); + } else { + planar = _mm_setr_epi8(0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15); + } + + // Swizzle the pixels to 8-bit planar. + *lo = _mm_shuffle_epi8(*lo, planar); // rrrrgggg bbbbaaaa + *hi = _mm_shuffle_epi8(*hi, planar); // RRRRGGGG BBBBAAAA + __m128i rg = _mm_unpacklo_epi32(*lo, *hi), // rrrrRRRR ggggGGGG + ba = _mm_unpackhi_epi32(*lo, *hi); // bbbbBBBB aaaaAAAA + + // Unpack to 16-bit planar. + __m128i r = _mm_unpacklo_epi8(rg, zeros), // r_r_r_r_ R_R_R_R_ + g = _mm_unpackhi_epi8(rg, zeros), // g_g_g_g_ G_G_G_G_ + b = _mm_unpacklo_epi8(ba, zeros), // b_b_b_b_ B_B_B_B_ + a = _mm_unpackhi_epi8(ba, zeros); // a_a_a_a_ A_A_A_A_ + + // Premultiply! + r = scale(r, a); + g = scale(g, a); + b = scale(b, a); + + // Repack into interlaced pixels. + rg = _mm_or_si128(r, _mm_slli_epi16(g, 8)); // rgrgrgrg RGRGRGRG + ba = _mm_or_si128(b, _mm_slli_epi16(a, 8)); // babababa BABABABA + *lo = _mm_unpacklo_epi16(rg, ba); // rgbargba rgbargba + *hi = _mm_unpackhi_epi16(rg, ba); // RGBARGBA RGBARGBA + }; + + while (count >= 8) { + __m128i lo = _mm_loadu_si128((const __m128i*) (src + 0)), + hi = _mm_loadu_si128((const __m128i*) (src + 4)); + + premul8(&lo, &hi); + + _mm_storeu_si128((__m128i*) (dst + 0), lo); + _mm_storeu_si128((__m128i*) (dst + 4), hi); + + src += 8; + dst += 8; + count -= 8; + } + + if (count >= 4) { + __m128i lo = _mm_loadu_si128((const __m128i*) src), + hi = _mm_setzero_si128(); + + premul8(&lo, &hi); + + _mm_storeu_si128((__m128i*) dst, lo); + + src += 4; + dst += 4; + count -= 4; + } + + // Call portable code to finish up the tail of [0,4) pixels. + auto proc = kSwapRB ? RGBA_to_bgrA_portable : RGBA_to_rgbA_portable; + proc(dst, src, count); +} + +/*not static*/ inline void RGBA_to_rgbA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(false, dst, src, count); +} + +/*not static*/ inline void RGBA_to_bgrA(uint32_t* dst, const uint32_t* src, int count) { + premul_should_swapRB(true, dst, src, count); +} + +/*not static*/ inline void RGBA_to_BGRA(uint32_t* dst, const uint32_t* src, int count) { + const __m128i swapRB = _mm_setr_epi8(2,1,0,3, 6,5,4,7, 10,9,8,11, 14,13,12,15); + + while (count >= 4) { + __m128i rgba = _mm_loadu_si128((const __m128i*) src); + __m128i bgra = _mm_shuffle_epi8(rgba, swapRB); + _mm_storeu_si128((__m128i*) dst, bgra); + + src += 4; + dst += 4; + count -= 4; + } + + RGBA_to_BGRA_portable(dst, src, count); +} + +/*not static*/ inline void grayA_to_RGBA(uint32_t dst[], const uint8_t* src, int count) { + while (count >= 8) { + __m128i ga = _mm_loadu_si128((const __m128i*) src); + + __m128i gg = _mm_or_si128(_mm_and_si128(ga, _mm_set1_epi16(0x00FF)), + _mm_slli_epi16(ga, 8)); + + __m128i ggga_lo = _mm_unpacklo_epi16(gg, ga); + __m128i ggga_hi = _mm_unpackhi_epi16(gg, ga); + + _mm_storeu_si128((__m128i*) (dst + 0), ggga_lo); + _mm_storeu_si128((__m128i*) (dst + 4), ggga_hi); + + src += 8*2; + dst += 8; + count -= 8; + } + + grayA_to_RGBA_portable(dst, src, count); +} + +/*not static*/ inline void grayA_to_rgbA(uint32_t dst[], const uint8_t* src, int count) { + while (count >= 8) { + __m128i grayA = _mm_loadu_si128((const __m128i*) src); + + __m128i g0 = _mm_and_si128(grayA, _mm_set1_epi16(0x00FF)); + __m128i a0 = _mm_srli_epi16(grayA, 8); + + // Premultiply + g0 = scale(g0, a0); + + __m128i gg = _mm_or_si128(g0, _mm_slli_epi16(g0, 8)); + __m128i ga = _mm_or_si128(g0, _mm_slli_epi16(a0, 8)); + + + __m128i ggga_lo = _mm_unpacklo_epi16(gg, ga); + __m128i ggga_hi = _mm_unpackhi_epi16(gg, ga); + + _mm_storeu_si128((__m128i*) (dst + 0), ggga_lo); + _mm_storeu_si128((__m128i*) (dst + 4), ggga_hi); + + src += 8*2; + dst += 8; + count -= 8; + } + + grayA_to_rgbA_portable(dst, src, count); +} + +enum Format { kRGB1, kBGR1 }; +static void inverted_cmyk_to(Format format, uint32_t* dst, const uint32_t* src, int count) { + auto convert8 = [=](__m128i* lo, __m128i* hi) { + const __m128i zeros = _mm_setzero_si128(); + __m128i planar; + if (kBGR1 == format) { + planar = _mm_setr_epi8(2,6,10,14, 1,5,9,13, 0,4,8,12, 3,7,11,15); + } else { + planar = _mm_setr_epi8(0,4,8,12, 1,5,9,13, 2,6,10,14, 3,7,11,15); + } + + // Swizzle the pixels to 8-bit planar. + *lo = _mm_shuffle_epi8(*lo, planar); // ccccmmmm yyyykkkk + *hi = _mm_shuffle_epi8(*hi, planar); // CCCCMMMM YYYYKKKK + __m128i cm = _mm_unpacklo_epi32(*lo, *hi), // ccccCCCC mmmmMMMM + yk = _mm_unpackhi_epi32(*lo, *hi); // yyyyYYYY kkkkKKKK + + // Unpack to 16-bit planar. + __m128i c = _mm_unpacklo_epi8(cm, zeros), // c_c_c_c_ C_C_C_C_ + m = _mm_unpackhi_epi8(cm, zeros), // m_m_m_m_ M_M_M_M_ + y = _mm_unpacklo_epi8(yk, zeros), // y_y_y_y_ Y_Y_Y_Y_ + k = _mm_unpackhi_epi8(yk, zeros); // k_k_k_k_ K_K_K_K_ + + // Scale to r, g, b. + __m128i r = scale(c, k), + g = scale(m, k), + b = scale(y, k); + + // Repack into interlaced pixels. + __m128i rg = _mm_or_si128(r, _mm_slli_epi16(g, 8)), // rgrgrgrg RGRGRGRG + ba = _mm_or_si128(b, _mm_set1_epi16((uint16_t) 0xFF00)); // b1b1b1b1 B1B1B1B1 + *lo = _mm_unpacklo_epi16(rg, ba); // rgbargba rgbargba + *hi = _mm_unpackhi_epi16(rg, ba); // RGB1RGB1 RGB1RGB1 + }; + + while (count >= 8) { + __m128i lo = _mm_loadu_si128((const __m128i*) (src + 0)), + hi = _mm_loadu_si128((const __m128i*) (src + 4)); + + convert8(&lo, &hi); + + _mm_storeu_si128((__m128i*) (dst + 0), lo); + _mm_storeu_si128((__m128i*) (dst + 4), hi); + + src += 8; + dst += 8; + count -= 8; + } + + if (count >= 4) { + __m128i lo = _mm_loadu_si128((const __m128i*) src), + hi = _mm_setzero_si128(); + + convert8(&lo, &hi); + + _mm_storeu_si128((__m128i*) dst, lo); + + src += 4; + dst += 4; + count -= 4; + } + + auto proc = (kBGR1 == format) ? inverted_CMYK_to_BGR1_portable : inverted_CMYK_to_RGB1_portable; + proc(dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_RGB1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kRGB1, dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_BGR1(uint32_t dst[], const uint32_t* src, int count) { + inverted_cmyk_to(kBGR1, dst, src, count); +} + +#else + +/*not static*/ inline void RGBA_to_rgbA(uint32_t* dst, const uint32_t* src, int count) { + RGBA_to_rgbA_portable(dst, src, count); +} + +/*not static*/ inline void RGBA_to_bgrA(uint32_t* dst, const uint32_t* src, int count) { + RGBA_to_bgrA_portable(dst, src, count); +} + +/*not static*/ inline void RGBA_to_BGRA(uint32_t* dst, const uint32_t* src, int count) { + RGBA_to_BGRA_portable(dst, src, count); +} + +/*not static*/ inline void grayA_to_RGBA(uint32_t dst[], const uint8_t* src, int count) { + grayA_to_RGBA_portable(dst, src, count); +} + +/*not static*/ inline void grayA_to_rgbA(uint32_t dst[], const uint8_t* src, int count) { + grayA_to_rgbA_portable(dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_RGB1(uint32_t dst[], const uint32_t* src, int count) { + inverted_CMYK_to_RGB1_portable(dst, src, count); +} + +/*not static*/ inline void inverted_CMYK_to_BGR1(uint32_t dst[], const uint32_t* src, int count) { + inverted_CMYK_to_BGR1_portable(dst, src, count); +} + +#endif + +// Basically as above, but we found no benefit from AVX-512 for gray_to_RGB1. +static void gray_to_RGB1_portable(uint32_t dst[], const uint8_t* src, int count) { + for (int i = 0; i < count; i++) { + dst[i] = (uint32_t)0xFF << 24 + | (uint32_t)src[i] << 16 + | (uint32_t)src[i] << 8 + | (uint32_t)src[i] << 0; + } +} +#if defined(SK_ARM_HAS_NEON) + /*not static*/ inline void gray_to_RGB1(uint32_t dst[], const uint8_t* src, int count) { + while (count >= 16) { + // Load 16 pixels. + uint8x16_t gray = vld1q_u8(src); + + // Set each of the color channels. + uint8x16x4_t rgba; + rgba.val[0] = gray; + rgba.val[1] = gray; + rgba.val[2] = gray; + rgba.val[3] = vdupq_n_u8(0xFF); + + // Store 16 pixels. + vst4q_u8((uint8_t*) dst, rgba); + src += 16; + dst += 16; + count -= 16; + } + if (count >= 8) { + // Load 8 pixels. + uint8x8_t gray = vld1_u8(src); + + // Set each of the color channels. + uint8x8x4_t rgba; + rgba.val[0] = gray; + rgba.val[1] = gray; + rgba.val[2] = gray; + rgba.val[3] = vdup_n_u8(0xFF); + + // Store 8 pixels. + vst4_u8((uint8_t*) dst, rgba); + src += 8; + dst += 8; + count -= 8; + } + gray_to_RGB1_portable(dst, src, count); + } +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + /*not static*/ inline void gray_to_RGB1(uint32_t dst[], const uint8_t* src, int count) { + const __m256i alphas = _mm256_set1_epi8((uint8_t) 0xFF); + while (count >= 32) { + __m256i grays = _mm256_loadu_si256((const __m256i*) src); + + __m256i gg_lo = _mm256_unpacklo_epi8(grays, grays); + __m256i gg_hi = _mm256_unpackhi_epi8(grays, grays); + __m256i ga_lo = _mm256_unpacklo_epi8(grays, alphas); + __m256i ga_hi = _mm256_unpackhi_epi8(grays, alphas); + + __m256i ggga0 = _mm256_unpacklo_epi16(gg_lo, ga_lo); + __m256i ggga1 = _mm256_unpackhi_epi16(gg_lo, ga_lo); + __m256i ggga2 = _mm256_unpacklo_epi16(gg_hi, ga_hi); + __m256i ggga3 = _mm256_unpackhi_epi16(gg_hi, ga_hi); + + // Shuffle for pixel reorder. + // Note. 'p' stands for 'ggga' + // Before shuffle: + // ggga0 = p0 p1 p2 p3 | p16 p17 p18 p19 + // ggga1 = p4 p5 p6 p7 | p20 p21 p22 p23 + // ggga2 = p8 p9 p10 p11 | p24 p25 p26 p27 + // ggga3 = p12 p13 p14 p15 | p28 p29 p30 p31 + // + // After shuffle: + // ggga0_shuffle = p0 p1 p2 p3 | p4 p5 p6 p7 + // ggga1_shuffle = p8 p9 p10 p11 | p12 p13 p14 p15 + // ggga2_shuffle = p16 p17 p18 p19 | p20 p21 p22 p23 + // ggga3_shuffle = p24 p25 p26 p27 | p28 p29 p30 p31 + __m256i ggga0_shuffle = _mm256_permute2x128_si256(ggga0, ggga1, 0x20), + ggga1_shuffle = _mm256_permute2x128_si256(ggga2, ggga3, 0x20), + ggga2_shuffle = _mm256_permute2x128_si256(ggga0, ggga1, 0x31), + ggga3_shuffle = _mm256_permute2x128_si256(ggga2, ggga3, 0x31); + + _mm256_storeu_si256((__m256i*) (dst + 0), ggga0_shuffle); + _mm256_storeu_si256((__m256i*) (dst + 8), ggga1_shuffle); + _mm256_storeu_si256((__m256i*) (dst + 16), ggga2_shuffle); + _mm256_storeu_si256((__m256i*) (dst + 24), ggga3_shuffle); + + src += 32; + dst += 32; + count -= 32; + } + gray_to_RGB1_portable(dst, src, count); + } +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 // TODO: just check >= SSE2? + /*not static*/ inline void gray_to_RGB1(uint32_t dst[], const uint8_t* src, int count) { + const __m128i alphas = _mm_set1_epi8((uint8_t) 0xFF); + while (count >= 16) { + __m128i grays = _mm_loadu_si128((const __m128i*) src); + + __m128i gg_lo = _mm_unpacklo_epi8(grays, grays); + __m128i gg_hi = _mm_unpackhi_epi8(grays, grays); + __m128i ga_lo = _mm_unpacklo_epi8(grays, alphas); + __m128i ga_hi = _mm_unpackhi_epi8(grays, alphas); + + __m128i ggga0 = _mm_unpacklo_epi16(gg_lo, ga_lo); + __m128i ggga1 = _mm_unpackhi_epi16(gg_lo, ga_lo); + __m128i ggga2 = _mm_unpacklo_epi16(gg_hi, ga_hi); + __m128i ggga3 = _mm_unpackhi_epi16(gg_hi, ga_hi); + + _mm_storeu_si128((__m128i*) (dst + 0), ggga0); + _mm_storeu_si128((__m128i*) (dst + 4), ggga1); + _mm_storeu_si128((__m128i*) (dst + 8), ggga2); + _mm_storeu_si128((__m128i*) (dst + 12), ggga3); + + src += 16; + dst += 16; + count -= 16; + } + gray_to_RGB1_portable(dst, src, count); + } +#else + /*not static*/ inline void gray_to_RGB1(uint32_t dst[], const uint8_t* src, int count) { + gray_to_RGB1_portable(dst, src, count); + } +#endif + +// Again as above, this time not even finding benefit from AVX2 for RGB_to_{RGB,BGR}1. +static void RGB_to_RGB1_portable(uint32_t dst[], const uint8_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t r = src[0], + g = src[1], + b = src[2]; + src += 3; + dst[i] = (uint32_t)0xFF << 24 + | (uint32_t)b << 16 + | (uint32_t)g << 8 + | (uint32_t)r << 0; + } +} +static void RGB_to_BGR1_portable(uint32_t dst[], const uint8_t* src, int count) { + for (int i = 0; i < count; i++) { + uint8_t r = src[0], + g = src[1], + b = src[2]; + src += 3; + dst[i] = (uint32_t)0xFF << 24 + | (uint32_t)r << 16 + | (uint32_t)g << 8 + | (uint32_t)b << 0; + } +} +#if defined(SK_ARM_HAS_NEON) + static void insert_alpha_should_swaprb(bool kSwapRB, + uint32_t dst[], const uint8_t* src, int count) { + while (count >= 16) { + // Load 16 pixels. + uint8x16x3_t rgb = vld3q_u8(src); + + // Insert an opaque alpha channel and swap if needed. + uint8x16x4_t rgba; + if (kSwapRB) { + rgba.val[0] = rgb.val[2]; + rgba.val[2] = rgb.val[0]; + } else { + rgba.val[0] = rgb.val[0]; + rgba.val[2] = rgb.val[2]; + } + rgba.val[1] = rgb.val[1]; + rgba.val[3] = vdupq_n_u8(0xFF); + + // Store 16 pixels. + vst4q_u8((uint8_t*) dst, rgba); + src += 16*3; + dst += 16; + count -= 16; + } + + if (count >= 8) { + // Load 8 pixels. + uint8x8x3_t rgb = vld3_u8(src); + + // Insert an opaque alpha channel and swap if needed. + uint8x8x4_t rgba; + if (kSwapRB) { + rgba.val[0] = rgb.val[2]; + rgba.val[2] = rgb.val[0]; + } else { + rgba.val[0] = rgb.val[0]; + rgba.val[2] = rgb.val[2]; + } + rgba.val[1] = rgb.val[1]; + rgba.val[3] = vdup_n_u8(0xFF); + + // Store 8 pixels. + vst4_u8((uint8_t*) dst, rgba); + src += 8*3; + dst += 8; + count -= 8; + } + + // Call portable code to finish up the tail of [0,8) pixels. + auto proc = kSwapRB ? RGB_to_BGR1_portable : RGB_to_RGB1_portable; + proc(dst, src, count); + } + + /*not static*/ inline void RGB_to_RGB1(uint32_t dst[], const uint8_t* src, int count) { + insert_alpha_should_swaprb(false, dst, src, count); + } + /*not static*/ inline void RGB_to_BGR1(uint32_t dst[], const uint8_t* src, int count) { + insert_alpha_should_swaprb(true, dst, src, count); + } +#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3 + static void insert_alpha_should_swaprb(bool kSwapRB, + uint32_t dst[], const uint8_t* src, int count) { + const __m128i alphaMask = _mm_set1_epi32(0xFF000000); + __m128i expand; + const uint8_t X = 0xFF; // Used a placeholder. The value of X is irrelevant. + if (kSwapRB) { + expand = _mm_setr_epi8(2,1,0,X, 5,4,3,X, 8,7,6,X, 11,10,9,X); + } else { + expand = _mm_setr_epi8(0,1,2,X, 3,4,5,X, 6,7,8,X, 9,10,11,X); + } + + while (count >= 6) { + // Load a vector. While this actually contains 5 pixels plus an + // extra component, we will discard all but the first four pixels on + // this iteration. + __m128i rgb = _mm_loadu_si128((const __m128i*) src); + + // Expand the first four pixels to RGBX and then mask to RGB(FF). + __m128i rgba = _mm_or_si128(_mm_shuffle_epi8(rgb, expand), alphaMask); + + // Store 4 pixels. + _mm_storeu_si128((__m128i*) dst, rgba); + + src += 4*3; + dst += 4; + count -= 4; + } + + // Call portable code to finish up the tail of [0,4) pixels. + auto proc = kSwapRB ? RGB_to_BGR1_portable : RGB_to_RGB1_portable; + proc(dst, src, count); + } + + /*not static*/ inline void RGB_to_RGB1(uint32_t dst[], const uint8_t* src, int count) { + insert_alpha_should_swaprb(false, dst, src, count); + } + /*not static*/ inline void RGB_to_BGR1(uint32_t dst[], const uint8_t* src, int count) { + insert_alpha_should_swaprb(true, dst, src, count); + } +#else + /*not static*/ inline void RGB_to_RGB1(uint32_t dst[], const uint8_t* src, int count) { + RGB_to_RGB1_portable(dst, src, count); + } + /*not static*/ inline void RGB_to_BGR1(uint32_t dst[], const uint8_t* src, int count) { + RGB_to_BGR1_portable(dst, src, count); + } +#endif + +} // namespace SK_OPTS_NS + +#endif // SkSwizzler_opts_DEFINED diff --git a/gfx/skia/skia/src/opts/SkUtils_opts.h b/gfx/skia/skia/src/opts/SkUtils_opts.h new file mode 100644 index 0000000000..2ec42285c8 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkUtils_opts.h @@ -0,0 +1,71 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkUtils_opts_DEFINED +#define SkUtils_opts_DEFINED + +#include +#include "src/base/SkVx.h" + +namespace SK_OPTS_NS { + + template + static void memsetT(T buffer[], T value, int count) { + #if defined(SK_CPU_SSE_LEVEL) && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX + static constexpr int N = 32 / sizeof(T); + #else + static constexpr int N = 16 / sizeof(T); + #endif + static_assert(N > 0, "T is too big for memsetT"); + // Create an N-wide version of value + skvx::Vec wideValue(value); + while (count >= N) { + // N at a time, copy the values into the destination buffer + wideValue.store(buffer); + buffer += N; + count -= N; + } + // If count was not an even multiple of N, take care of the last few. + while (count --> 0) { + *buffer++ = value; + } + } + + /*not static*/ inline void memset16(uint16_t buffer[], uint16_t value, int count) { + memsetT(buffer, value, count); + } + /*not static*/ inline void memset32(uint32_t buffer[], uint32_t value, int count) { + memsetT(buffer, value, count); + } + /*not static*/ inline void memset64(uint64_t buffer[], uint64_t value, int count) { + memsetT(buffer, value, count); + } + + template + static void rect_memsetT(T buffer[], T value, int count, size_t rowBytes, int height) { + while (height --> 0) { + memsetT(buffer, value, count); + buffer = (T*)((char*)buffer + rowBytes); + } + } + + /*not static*/ inline void rect_memset16(uint16_t buffer[], uint16_t value, int count, + size_t rowBytes, int height) { + rect_memsetT(buffer, value, count, rowBytes, height); + } + /*not static*/ inline void rect_memset32(uint32_t buffer[], uint32_t value, int count, + size_t rowBytes, int height) { + rect_memsetT(buffer, value, count, rowBytes, height); + } + /*not static*/ inline void rect_memset64(uint64_t buffer[], uint64_t value, int count, + size_t rowBytes, int height) { + rect_memsetT(buffer, value, count, rowBytes, height); + } + +} // namespace SK_OPTS_NS + +#endif//SkUtils_opts_DEFINED diff --git a/gfx/skia/skia/src/opts/SkVM_opts.h b/gfx/skia/skia/src/opts/SkVM_opts.h new file mode 100644 index 0000000000..8acb53ef15 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkVM_opts.h @@ -0,0 +1,351 @@ +// Copyright 2020 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#ifndef SkVM_opts_DEFINED +#define SkVM_opts_DEFINED + +#include "src/base/SkVx.h" +#include "src/core/SkVM.h" +#include "src/sksl/tracing/SkSLTraceHook.h" +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + #include +#endif + +template +static inline skvx::Vec gather32(const int* ptr, const skvx::Vec& ix) { +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + if constexpr (N == 8) { + return skvx::bit_pun>( + _mm256_i32gather_epi32(ptr, skvx::bit_pun<__m256i>(ix), 4)); + } +#endif + // Try to recurse on specializations, falling back on standard scalar map()-based impl. + if constexpr (N > 8) { + return join(gather32(ptr, ix.lo), + gather32(ptr, ix.hi)); + } + return map([&](int i) { return ptr[i]; }, ix); +} + +namespace SK_OPTS_NS { + +namespace SkVMInterpreterTypes { +#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2 + constexpr inline int K = 32; // 1024-bit: 4 ymm or 2 zmm at a time +#else + constexpr inline int K = 8; // 256-bit: 2 xmm, 2 v-registers, etc. +#endif + using I32 = skvx::Vec; + using I16 = skvx::Vec; + using F32 = skvx::Vec; + using U64 = skvx::Vec; + using U32 = skvx::Vec; + using U16 = skvx::Vec; + using U8 = skvx::Vec; + union Slot { + F32 f32; + I32 i32; + U32 u32; + I16 i16; + U16 u16; + }; +} // namespace SkVMInterpreterTypes + + inline void interpret_skvm(const skvm::InterpreterInstruction insts[], const int ninsts, + const int nregs, const int loop, + const int strides[], + SkSL::TraceHook* traceHooks[], const int nTraceHooks, + const int nargs, int n, void* args[]) { + using namespace skvm; + + using SkVMInterpreterTypes::K; + using SkVMInterpreterTypes::I32; + using SkVMInterpreterTypes::I16; + using SkVMInterpreterTypes::F32; + using SkVMInterpreterTypes::U64; + using SkVMInterpreterTypes::U32; + using SkVMInterpreterTypes::U16; + using SkVMInterpreterTypes::U8; + using SkVMInterpreterTypes::Slot; + + // We'll operate in SIMT style, knocking off K-size chunks from n while possible. + + Slot few_regs[16]; + std::unique_ptr many_regs; + + Slot* r = few_regs; + + if (nregs > (int)std::size(few_regs)) { + // Annoyingly we can't trust that malloc() or new will work with Slot because + // the skvx::Vec types may have alignment greater than what they provide. + // We'll overallocate one extra register so we can align manually. + many_regs.reset(new char[ sizeof(Slot) * (nregs + 1) ]); + + uintptr_t addr = (uintptr_t)many_regs.get(); + addr += alignof(Slot) - + (addr & (alignof(Slot) - 1)); + SkASSERT((addr & (alignof(Slot) - 1)) == 0); + r = (Slot*)addr; + } + + const auto should_trace = [&](int stride, int immA, Reg x, Reg y) -> bool { + if (immA < 0 || immA >= nTraceHooks) { + return false; + } + // When stride == K, all lanes are used. + if (stride == K) { + return any(r[x].i32 & r[y].i32); + } + // When stride == 1, only the first lane is used; the rest are not meaningful. + return r[x].i32[0] & r[y].i32[0]; + }; + + // Step each argument pointer ahead by its stride a number of times. + auto step_args = [&](int times) { + for (int i = 0; i < nargs; i++) { + args[i] = (void*)( (char*)args[i] + times * strides[i] ); + } + }; + + int start = 0, + stride; + for ( ; n > 0; start = loop, n -= stride, step_args(stride)) { + stride = n >= K ? K : 1; + + for (int instIdx = start; instIdx < ninsts; instIdx++) { + InterpreterInstruction inst = insts[instIdx]; + + // d = op(x,y,z,w, immA,immB) + Reg d = inst.d, + x = inst.x, + y = inst.y, + z = inst.z, + w = inst.w; + int immA = inst.immA, + immB = inst.immB, + immC = inst.immC; + + // Ops that interact with memory need to know whether we're stride=1 or K, + // but all non-memory ops can run the same code no matter the stride. + switch (2*(int)inst.op + (stride == K ? 1 : 0)) { + default: SkUNREACHABLE; + + #define STRIDE_1(op) case 2*(int)op + #define STRIDE_K(op) case 2*(int)op + 1 + STRIDE_1(Op::store8 ): memcpy(args[immA], &r[x].i32, 1); break; + STRIDE_1(Op::store16): memcpy(args[immA], &r[x].i32, 2); break; + STRIDE_1(Op::store32): memcpy(args[immA], &r[x].i32, 4); break; + STRIDE_1(Op::store64): memcpy((char*)args[immA]+0, &r[x].i32, 4); + memcpy((char*)args[immA]+4, &r[y].i32, 4); break; + + STRIDE_K(Op::store8 ): skvx::cast (r[x].i32).store(args[immA]); break; + STRIDE_K(Op::store16): skvx::cast(r[x].i32).store(args[immA]); break; + STRIDE_K(Op::store32): (r[x].i32).store(args[immA]); break; + STRIDE_K(Op::store64): (skvx::cast(r[x].u32) << 0 | + skvx::cast(r[y].u32) << 32).store(args[immA]); + break; + + STRIDE_1(Op::load8 ): r[d].i32 = 0; memcpy(&r[d].i32, args[immA], 1); break; + STRIDE_1(Op::load16): r[d].i32 = 0; memcpy(&r[d].i32, args[immA], 2); break; + STRIDE_1(Op::load32): r[d].i32 = 0; memcpy(&r[d].i32, args[immA], 4); break; + STRIDE_1(Op::load64): + r[d].i32 = 0; memcpy(&r[d].i32, (char*)args[immA] + 4*immB, 4); break; + + STRIDE_K(Op::load8 ): r[d].i32= skvx::cast(U8 ::Load(args[immA])); break; + STRIDE_K(Op::load16): r[d].i32= skvx::cast(U16::Load(args[immA])); break; + STRIDE_K(Op::load32): r[d].i32= I32::Load(args[immA]) ; break; + STRIDE_K(Op::load64): + // Low 32 bits if immB=0, or high 32 bits if immB=1. + r[d].i32 = skvx::cast(U64::Load(args[immA]) >> (32*immB)); break; + + // The pointer we base our gather on is loaded indirectly from a uniform: + // - args[immA] is the uniform holding our gather base pointer somewhere; + // - (const uint8_t*)args[immA] + immB points to the gather base pointer; + // - memcpy() loads the gather base and into a pointer of the right type. + // After all that we have an ordinary (uniform) pointer `ptr` to load from, + // and we then gather from it using the varying indices in r[x]. + STRIDE_1(Op::gather8): { + const uint8_t* ptr; + memcpy(&ptr, (const uint8_t*)args[immA] + immB, sizeof(ptr)); + r[d].i32 = ptr[ r[x].i32[0] ]; + } break; + STRIDE_1(Op::gather16): { + const uint16_t* ptr; + memcpy(&ptr, (const uint8_t*)args[immA] + immB, sizeof(ptr)); + r[d].i32 = ptr[ r[x].i32[0] ]; + } break; + STRIDE_1(Op::gather32): { + const int* ptr; + memcpy(&ptr, (const uint8_t*)args[immA] + immB, sizeof(ptr)); + r[d].i32 = ptr[ r[x].i32[0] ]; + } break; + + STRIDE_K(Op::gather8): { + const uint8_t* ptr; + memcpy(&ptr, (const uint8_t*)args[immA] + immB, sizeof(ptr)); + r[d].i32 = map([&](int ix) { return (int)ptr[ix]; }, r[x].i32); + } break; + STRIDE_K(Op::gather16): { + const uint16_t* ptr; + memcpy(&ptr, (const uint8_t*)args[immA] + immB, sizeof(ptr)); + r[d].i32 = map([&](int ix) { return (int)ptr[ix]; }, r[x].i32); + } break; + STRIDE_K(Op::gather32): { + const int* ptr; + memcpy(&ptr, (const uint8_t*)args[immA] + immB, sizeof(ptr)); + r[d].i32 = gather32(ptr, r[x].i32); + } break; + + #undef STRIDE_1 + #undef STRIDE_K + + // Ops that don't interact with memory should never care about the stride. + #define CASE(op) case 2*(int)op: /*fallthrough*/ case 2*(int)op+1 + + // These 128-bit ops are implemented serially for simplicity. + CASE(Op::store128): { + U64 lo = (skvx::cast(r[x].u32) << 0 | + skvx::cast(r[y].u32) << 32), + hi = (skvx::cast(r[z].u32) << 0 | + skvx::cast(r[w].u32) << 32); + for (int i = 0; i < stride; i++) { + memcpy((char*)args[immA] + 16*i + 0, &lo[i], 8); + memcpy((char*)args[immA] + 16*i + 8, &hi[i], 8); + } + } break; + + CASE(Op::load128): + r[d].i32 = 0; + for (int i = 0; i < stride; i++) { + memcpy(&r[d].i32[i], (const char*)args[immA] + 16*i+ 4*immB, 4); + } break; + + CASE(Op::assert_true): + #ifdef SK_DEBUG + if (!all(r[x].i32)) { + SkDebugf("inst %d, register %d\n", instIdx, y); + for (int i = 0; i < K; i++) { + SkDebugf("\t%2d: %08x (%g)\n", + instIdx, r[y].i32[instIdx], r[y].f32[instIdx]); + } + SkASSERT(false); + } + #endif + break; + + CASE(Op::trace_line): + if (should_trace(stride, immA, x, y)) { + traceHooks[immA]->line(immB); + } + break; + + CASE(Op::trace_var): + if (should_trace(stride, immA, x, y)) { + for (int i = 0; i < K; ++i) { + if (r[x].i32[i] & r[y].i32[i]) { + traceHooks[immA]->var(immB, r[z].i32[i]); + break; + } + } + } + break; + + CASE(Op::trace_enter): + if (should_trace(stride, immA, x, y)) { + traceHooks[immA]->enter(immB); + } + break; + + CASE(Op::trace_exit): + if (should_trace(stride, immA, x, y)) { + traceHooks[immA]->exit(immB); + } + break; + + CASE(Op::trace_scope): + if (should_trace(stride, immA, x, y)) { + traceHooks[immA]->scope(immB); + } + break; + + CASE(Op::index): { + const int iota[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15, + 16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31, + 32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47, + 48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63 }; + static_assert(K <= std::size(iota), ""); + + r[d].i32 = n - I32::Load(iota); + } break; + + CASE(Op::uniform32): + r[d].i32 = *(const int*)( (const char*)args[immA] + immB ); + break; + + CASE(Op::array32): + const int* ptr; + memcpy(&ptr, (const uint8_t*)args[immA] + immB, sizeof(ptr)); + r[d].i32 = ptr[immC/sizeof(int)]; + break; + + CASE(Op::splat): r[d].i32 = immA; break; + + CASE(Op::add_f32): r[d].f32 = r[x].f32 + r[y].f32; break; + CASE(Op::sub_f32): r[d].f32 = r[x].f32 - r[y].f32; break; + CASE(Op::mul_f32): r[d].f32 = r[x].f32 * r[y].f32; break; + CASE(Op::div_f32): r[d].f32 = r[x].f32 / r[y].f32; break; + CASE(Op::min_f32): r[d].f32 = min(r[x].f32, r[y].f32); break; + CASE(Op::max_f32): r[d].f32 = max(r[x].f32, r[y].f32); break; + + CASE(Op::fma_f32): r[d].f32 = fma( r[x].f32, r[y].f32, r[z].f32); break; + CASE(Op::fms_f32): r[d].f32 = fma( r[x].f32, r[y].f32, -r[z].f32); break; + CASE(Op::fnma_f32): r[d].f32 = fma(-r[x].f32, r[y].f32, r[z].f32); break; + + CASE(Op::sqrt_f32): r[d].f32 = sqrt(r[x].f32); break; + + CASE(Op::add_i32): r[d].i32 = r[x].i32 + r[y].i32; break; + CASE(Op::sub_i32): r[d].i32 = r[x].i32 - r[y].i32; break; + CASE(Op::mul_i32): r[d].i32 = r[x].i32 * r[y].i32; break; + + CASE(Op::shl_i32): r[d].i32 = r[x].i32 << immA; break; + CASE(Op::sra_i32): r[d].i32 = r[x].i32 >> immA; break; + CASE(Op::shr_i32): r[d].u32 = r[x].u32 >> immA; break; + + CASE(Op:: eq_f32): r[d].i32 = r[x].f32 == r[y].f32; break; + CASE(Op::neq_f32): r[d].i32 = r[x].f32 != r[y].f32; break; + CASE(Op:: gt_f32): r[d].i32 = r[x].f32 > r[y].f32; break; + CASE(Op::gte_f32): r[d].i32 = r[x].f32 >= r[y].f32; break; + + CASE(Op:: eq_i32): r[d].i32 = r[x].i32 == r[y].i32; break; + CASE(Op:: gt_i32): r[d].i32 = r[x].i32 > r[y].i32; break; + + CASE(Op::bit_and ): r[d].i32 = r[x].i32 & r[y].i32; break; + CASE(Op::bit_or ): r[d].i32 = r[x].i32 | r[y].i32; break; + CASE(Op::bit_xor ): r[d].i32 = r[x].i32 ^ r[y].i32; break; + CASE(Op::bit_clear): r[d].i32 = r[x].i32 & ~r[y].i32; break; + + CASE(Op::select): r[d].i32 = skvx::if_then_else(r[x].i32, r[y].i32, r[z].i32); + break; + + CASE(Op::ceil): r[d].f32 = skvx::ceil(r[x].f32) ; break; + CASE(Op::floor): r[d].f32 = skvx::floor(r[x].f32) ; break; + CASE(Op::to_f32): r[d].f32 = skvx::cast( r[x].i32 ); break; + CASE(Op::trunc): r[d].i32 = skvx::cast ( r[x].f32 ); break; + CASE(Op::round): r[d].i32 = skvx::cast (skvx::lrint(r[x].f32)); break; + + CASE(Op::to_fp16): + r[d].i32 = skvx::cast(skvx::to_half(r[x].f32)); + break; + CASE(Op::from_fp16): + r[d].f32 = skvx::from_half(skvx::cast(r[x].i32)); + break; + + #undef CASE + } + } + } + } + +} // namespace SK_OPTS_NS + +#endif//SkVM_opts_DEFINED diff --git a/gfx/skia/skia/src/opts/SkXfermode_opts.h b/gfx/skia/skia/src/opts/SkXfermode_opts.h new file mode 100644 index 0000000000..15714791a3 --- /dev/null +++ b/gfx/skia/skia/src/opts/SkXfermode_opts.h @@ -0,0 +1,137 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef Sk4pxXfermode_DEFINED +#define Sk4pxXfermode_DEFINED + +#include "src/base/SkMSAN.h" +#include "src/core/Sk4px.h" +#include "src/core/SkXfermodePriv.h" + +#ifdef SK_FORCE_RASTER_PIPELINE_BLITTER + +namespace SK_OPTS_NS { + /*not static*/ inline SkXfermode* create_xfermode(SkBlendMode) { return nullptr; } +} + +#else + +namespace { // NOLINT(google-build-namespaces) + +// Most xfermodes can be done most efficiently 4 pixels at a time in 8 or 16-bit fixed point. +#define XFERMODE(Xfermode) \ + struct Xfermode { Sk4px operator()(const Sk4px&, const Sk4px&) const; }; \ + inline Sk4px Xfermode::operator()(const Sk4px& d, const Sk4px& s) const + +XFERMODE(Clear) { return Sk4px::DupPMColor(0); } +XFERMODE(Src) { return s; } +XFERMODE(Dst) { return d; } +XFERMODE(SrcIn) { return s.approxMulDiv255(d.alphas() ); } +XFERMODE(SrcOut) { return s.approxMulDiv255(d.alphas().inv()); } +XFERMODE(SrcOver) { return s + d.approxMulDiv255(s.alphas().inv()); } +XFERMODE(DstIn) { return SrcIn ()(s,d); } +XFERMODE(DstOut) { return SrcOut ()(s,d); } +XFERMODE(DstOver) { return SrcOver()(s,d); } + +// [ S * Da + (1 - Sa) * D] +XFERMODE(SrcATop) { return (s * d.alphas() + d * s.alphas().inv()).div255(); } +XFERMODE(DstATop) { return SrcATop()(s,d); } +//[ S * (1 - Da) + (1 - Sa) * D ] +XFERMODE(Xor) { return (s * d.alphas().inv() + d * s.alphas().inv()).div255(); } +// [S + D ] +XFERMODE(Plus) { return s.saturatedAdd(d); } +// [S * D ] +XFERMODE(Modulate) { return s.approxMulDiv255(d); } +// [S + D - S * D] +XFERMODE(Screen) { + // Doing the math as S + (1-S)*D or S + (D - S*D) means the add and subtract can be done + // in 8-bit space without overflow. S + (1-S)*D is a touch faster because inv() is cheap. + return s + d.approxMulDiv255(s.inv()); +} + +#undef XFERMODE + +// A reasonable fallback mode for doing AA is to simply apply the transfermode first, +// then linearly interpolate the AA. +template +static Sk4px xfer_aa(const Sk4px& d, const Sk4px& s, const Sk4px& aa) { + Sk4px bw = Xfermode()(d, s); + return (bw * aa + d * aa.inv()).div255(); +} + +// For some transfermodes we specialize AA, either for correctness or performance. +#define XFERMODE_AA(Xfermode) \ + template <> inline Sk4px xfer_aa(const Sk4px& d, const Sk4px& s, const Sk4px& aa) + +// Plus' clamp needs to happen after AA. skia:3852 +XFERMODE_AA(Plus) { // [ clamp( (1-AA)D + (AA)(S+D) ) == clamp(D + AA*S) ] + return d.saturatedAdd(s.approxMulDiv255(aa)); +} + +#undef XFERMODE_AA + +// Src and Clear modes are safe to use with uninitialized dst buffers, +// even if the implementation branches based on bytes from dst (e.g. asserts in Debug mode). +// For those modes, just lie to MSAN that dst is always intialized. +template static void mark_dst_initialized_if_safe(void*, void*) {} +template <> inline void mark_dst_initialized_if_safe(void* dst, void* end) { + sk_msan_mark_initialized(dst, end, "Src doesn't read dst."); +} +template <> inline void mark_dst_initialized_if_safe(void* dst, void* end) { + sk_msan_mark_initialized(dst, end, "Clear doesn't read dst."); +} + +template +class Sk4pxXfermode : public SkXfermode { +public: + Sk4pxXfermode() {} + + void xfer32(SkPMColor dst[], const SkPMColor src[], int n, const SkAlpha aa[]) const override { + mark_dst_initialized_if_safe(dst, dst+n); + if (nullptr == aa) { + Sk4px::MapDstSrc(n, dst, src, Xfermode()); + } else { + Sk4px::MapDstSrcAlpha(n, dst, src, aa, xfer_aa); + } + } +}; + +} // namespace + +namespace SK_OPTS_NS { + +/*not static*/ inline SkXfermode* create_xfermode(SkBlendMode mode) { + switch (mode) { +#define CASE(Xfermode) \ + case SkBlendMode::k##Xfermode: return new Sk4pxXfermode() + CASE(Clear); + CASE(Src); + CASE(Dst); + CASE(SrcOver); + CASE(DstOver); + CASE(SrcIn); + CASE(DstIn); + CASE(SrcOut); + CASE(DstOut); + CASE(SrcATop); + CASE(DstATop); + CASE(Xor); + CASE(Plus); + CASE(Modulate); + CASE(Screen); + #undef CASE + + default: break; + } + return nullptr; +} + +} // namespace SK_OPTS_NS + +#endif // #ifdef SK_FORCE_RASTER_PIPELINE_BLITTER + +#endif//Sk4pxXfermode_DEFINED diff --git a/gfx/skia/skia/src/pathops/SkAddIntersections.cpp b/gfx/skia/skia/src/pathops/SkAddIntersections.cpp new file mode 100644 index 0000000000..913db87230 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkAddIntersections.cpp @@ -0,0 +1,595 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pathops/SkAddIntersections.h" + +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "src/pathops/SkIntersectionHelper.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkOpCoincidence.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsBounds.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +#if DEBUG_ADD_INTERSECTING_TS + +static void debugShowLineIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " LINE_DEBUG_STR " " LINE_DEBUG_STR "\n", + __FUNCTION__, LINE_DEBUG_DATA(wt.pts()), LINE_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " LINE_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], LINE_DEBUG_DATA(wt.pts()), PT_DEBUG_DATA(i, 0)); + if (pts == 2) { + SkDebugf(" " T_DEBUG_STR(wtTs, 1) " " PT_DEBUG_STR, i[0][1], PT_DEBUG_DATA(i, 1)); + } + SkDebugf(" wnTs[0]=%g " LINE_DEBUG_STR, i[1][0], LINE_DEBUG_DATA(wn.pts())); + if (pts == 2) { + SkDebugf(" " T_DEBUG_STR(wnTs, 1), i[1][1]); + } + SkDebugf("\n"); +} + +static void debugShowQuadLineIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, + const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " QUAD_DEBUG_STR " " LINE_DEBUG_STR "\n", + __FUNCTION__, QUAD_DEBUG_DATA(wt.pts()), LINE_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " QUAD_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], QUAD_DEBUG_DATA(wt.pts()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " LINE_DEBUG_STR, i[1][0], LINE_DEBUG_DATA(wn.pts())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowQuadIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " QUAD_DEBUG_STR " " QUAD_DEBUG_STR "\n", + __FUNCTION__, QUAD_DEBUG_DATA(wt.pts()), QUAD_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " QUAD_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], QUAD_DEBUG_DATA(wt.pts()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " QUAD_DEBUG_STR, i[1][0], QUAD_DEBUG_DATA(wn.pts())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowConicLineIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " CONIC_DEBUG_STR " " LINE_DEBUG_STR "\n", + __FUNCTION__, CONIC_DEBUG_DATA(wt.pts(), wt.weight()), LINE_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " CONIC_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], CONIC_DEBUG_DATA(wt.pts(), wt.weight()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " LINE_DEBUG_STR, i[1][0], LINE_DEBUG_DATA(wn.pts())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowConicQuadIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " CONIC_DEBUG_STR " " QUAD_DEBUG_STR "\n", + __FUNCTION__, CONIC_DEBUG_DATA(wt.pts(), wt.weight()), QUAD_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " CONIC_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], CONIC_DEBUG_DATA(wt.pts(), wt.weight()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " QUAD_DEBUG_STR, i[1][0], QUAD_DEBUG_DATA(wn.pts())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowConicIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " CONIC_DEBUG_STR " " CONIC_DEBUG_STR "\n", + __FUNCTION__, CONIC_DEBUG_DATA(wt.pts(), wt.weight()), + CONIC_DEBUG_DATA(wn.pts(), wn.weight())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " CONIC_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], CONIC_DEBUG_DATA(wt.pts(), wt.weight()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " CONIC_DEBUG_STR, i[1][0], CONIC_DEBUG_DATA(wn.pts(), wn.weight())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowCubicLineIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " CUBIC_DEBUG_STR " " LINE_DEBUG_STR "\n", + __FUNCTION__, CUBIC_DEBUG_DATA(wt.pts()), LINE_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " CUBIC_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], CUBIC_DEBUG_DATA(wt.pts()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " LINE_DEBUG_STR, i[1][0], LINE_DEBUG_DATA(wn.pts())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowCubicQuadIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " CUBIC_DEBUG_STR " " QUAD_DEBUG_STR "\n", + __FUNCTION__, CUBIC_DEBUG_DATA(wt.pts()), QUAD_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " CUBIC_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], CUBIC_DEBUG_DATA(wt.pts()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " QUAD_DEBUG_STR, i[1][0], QUAD_DEBUG_DATA(wn.pts())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowCubicConicIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " CUBIC_DEBUG_STR " " CONIC_DEBUG_STR "\n", + __FUNCTION__, CUBIC_DEBUG_DATA(wt.pts()), CONIC_DEBUG_DATA(wn.pts(), wn.weight())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " CUBIC_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], CUBIC_DEBUG_DATA(wt.pts()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " CONIC_DEBUG_STR, i[1][0], CONIC_DEBUG_DATA(wn.pts(), wn.weight())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +static void debugShowCubicIntersection(int pts, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn, const SkIntersections& i) { + SkASSERT(i.used() == pts); + if (!pts) { + SkDebugf("%s no intersect " CUBIC_DEBUG_STR " " CUBIC_DEBUG_STR "\n", + __FUNCTION__, CUBIC_DEBUG_DATA(wt.pts()), CUBIC_DEBUG_DATA(wn.pts())); + return; + } + SkDebugf("%s " T_DEBUG_STR(wtTs, 0) " " CUBIC_DEBUG_STR " " PT_DEBUG_STR, __FUNCTION__, + i[0][0], CUBIC_DEBUG_DATA(wt.pts()), PT_DEBUG_DATA(i, 0)); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wtTs) " " PT_DEBUG_STR, n, i[0][n], PT_DEBUG_DATA(i, n)); + } + SkDebugf(" wnTs[0]=%g " CUBIC_DEBUG_STR, i[1][0], CUBIC_DEBUG_DATA(wn.pts())); + for (int n = 1; n < pts; ++n) { + SkDebugf(" " TX_DEBUG_STR(wnTs), n, i[1][n]); + } + SkDebugf("\n"); +} + +#else +static void debugShowLineIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowQuadLineIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowQuadIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowConicLineIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowConicQuadIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowConicIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowCubicLineIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowCubicQuadIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowCubicConicIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} + +static void debugShowCubicIntersection(int , const SkIntersectionHelper& , + const SkIntersectionHelper& , const SkIntersections& ) { +} +#endif + +bool AddIntersectTs(SkOpContour* test, SkOpContour* next, SkOpCoincidence* coincidence) { + if (test != next) { + if (AlmostLessUlps(test->bounds().fBottom, next->bounds().fTop)) { + return false; + } + // OPTIMIZATION: outset contour bounds a smidgen instead? + if (!SkPathOpsBounds::Intersects(test->bounds(), next->bounds())) { + return true; + } + } + SkIntersectionHelper wt; + wt.init(test); + do { + SkIntersectionHelper wn; + wn.init(next); + test->debugValidate(); + next->debugValidate(); + if (test == next && !wn.startAfter(wt)) { + continue; + } + do { + if (!SkPathOpsBounds::Intersects(wt.bounds(), wn.bounds())) { + continue; + } + int pts = 0; + SkIntersections ts { SkDEBUGCODE(test->globalState()) }; + bool swap = false; + SkDQuad quad1, quad2; + SkDConic conic1, conic2; + SkDCubic cubic1, cubic2; + switch (wt.segmentType()) { + case SkIntersectionHelper::kHorizontalLine_Segment: + swap = true; + switch (wn.segmentType()) { + case SkIntersectionHelper::kHorizontalLine_Segment: + case SkIntersectionHelper::kVerticalLine_Segment: + case SkIntersectionHelper::kLine_Segment: + pts = ts.lineHorizontal(wn.pts(), wt.left(), + wt.right(), wt.y(), wt.xFlipped()); + debugShowLineIntersection(pts, wn, wt, ts); + break; + case SkIntersectionHelper::kQuad_Segment: + pts = ts.quadHorizontal(wn.pts(), wt.left(), + wt.right(), wt.y(), wt.xFlipped()); + debugShowQuadLineIntersection(pts, wn, wt, ts); + break; + case SkIntersectionHelper::kConic_Segment: + pts = ts.conicHorizontal(wn.pts(), wn.weight(), wt.left(), + wt.right(), wt.y(), wt.xFlipped()); + debugShowConicLineIntersection(pts, wn, wt, ts); + break; + case SkIntersectionHelper::kCubic_Segment: + pts = ts.cubicHorizontal(wn.pts(), wt.left(), + wt.right(), wt.y(), wt.xFlipped()); + debugShowCubicLineIntersection(pts, wn, wt, ts); + break; + default: + SkASSERT(0); + } + break; + case SkIntersectionHelper::kVerticalLine_Segment: + swap = true; + switch (wn.segmentType()) { + case SkIntersectionHelper::kHorizontalLine_Segment: + case SkIntersectionHelper::kVerticalLine_Segment: + case SkIntersectionHelper::kLine_Segment: { + pts = ts.lineVertical(wn.pts(), wt.top(), + wt.bottom(), wt.x(), wt.yFlipped()); + debugShowLineIntersection(pts, wn, wt, ts); + break; + } + case SkIntersectionHelper::kQuad_Segment: { + pts = ts.quadVertical(wn.pts(), wt.top(), + wt.bottom(), wt.x(), wt.yFlipped()); + debugShowQuadLineIntersection(pts, wn, wt, ts); + break; + } + case SkIntersectionHelper::kConic_Segment: { + pts = ts.conicVertical(wn.pts(), wn.weight(), wt.top(), + wt.bottom(), wt.x(), wt.yFlipped()); + debugShowConicLineIntersection(pts, wn, wt, ts); + break; + } + case SkIntersectionHelper::kCubic_Segment: { + pts = ts.cubicVertical(wn.pts(), wt.top(), + wt.bottom(), wt.x(), wt.yFlipped()); + debugShowCubicLineIntersection(pts, wn, wt, ts); + break; + } + default: + SkASSERT(0); + } + break; + case SkIntersectionHelper::kLine_Segment: + switch (wn.segmentType()) { + case SkIntersectionHelper::kHorizontalLine_Segment: + pts = ts.lineHorizontal(wt.pts(), wn.left(), + wn.right(), wn.y(), wn.xFlipped()); + debugShowLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kVerticalLine_Segment: + pts = ts.lineVertical(wt.pts(), wn.top(), + wn.bottom(), wn.x(), wn.yFlipped()); + debugShowLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kLine_Segment: + pts = ts.lineLine(wt.pts(), wn.pts()); + debugShowLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kQuad_Segment: + swap = true; + pts = ts.quadLine(wn.pts(), wt.pts()); + debugShowQuadLineIntersection(pts, wn, wt, ts); + break; + case SkIntersectionHelper::kConic_Segment: + swap = true; + pts = ts.conicLine(wn.pts(), wn.weight(), wt.pts()); + debugShowConicLineIntersection(pts, wn, wt, ts); + break; + case SkIntersectionHelper::kCubic_Segment: + swap = true; + pts = ts.cubicLine(wn.pts(), wt.pts()); + debugShowCubicLineIntersection(pts, wn, wt, ts); + break; + default: + SkASSERT(0); + } + break; + case SkIntersectionHelper::kQuad_Segment: + switch (wn.segmentType()) { + case SkIntersectionHelper::kHorizontalLine_Segment: + pts = ts.quadHorizontal(wt.pts(), wn.left(), + wn.right(), wn.y(), wn.xFlipped()); + debugShowQuadLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kVerticalLine_Segment: + pts = ts.quadVertical(wt.pts(), wn.top(), + wn.bottom(), wn.x(), wn.yFlipped()); + debugShowQuadLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kLine_Segment: + pts = ts.quadLine(wt.pts(), wn.pts()); + debugShowQuadLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kQuad_Segment: { + pts = ts.intersect(quad1.set(wt.pts()), quad2.set(wn.pts())); + debugShowQuadIntersection(pts, wt, wn, ts); + break; + } + case SkIntersectionHelper::kConic_Segment: { + swap = true; + pts = ts.intersect(conic2.set(wn.pts(), wn.weight()), + quad1.set(wt.pts())); + debugShowConicQuadIntersection(pts, wn, wt, ts); + break; + } + case SkIntersectionHelper::kCubic_Segment: { + swap = true; + pts = ts.intersect(cubic2.set(wn.pts()), quad1.set(wt.pts())); + debugShowCubicQuadIntersection(pts, wn, wt, ts); + break; + } + default: + SkASSERT(0); + } + break; + case SkIntersectionHelper::kConic_Segment: + switch (wn.segmentType()) { + case SkIntersectionHelper::kHorizontalLine_Segment: + pts = ts.conicHorizontal(wt.pts(), wt.weight(), wn.left(), + wn.right(), wn.y(), wn.xFlipped()); + debugShowConicLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kVerticalLine_Segment: + pts = ts.conicVertical(wt.pts(), wt.weight(), wn.top(), + wn.bottom(), wn.x(), wn.yFlipped()); + debugShowConicLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kLine_Segment: + pts = ts.conicLine(wt.pts(), wt.weight(), wn.pts()); + debugShowConicLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kQuad_Segment: { + pts = ts.intersect(conic1.set(wt.pts(), wt.weight()), + quad2.set(wn.pts())); + debugShowConicQuadIntersection(pts, wt, wn, ts); + break; + } + case SkIntersectionHelper::kConic_Segment: { + pts = ts.intersect(conic1.set(wt.pts(), wt.weight()), + conic2.set(wn.pts(), wn.weight())); + debugShowConicIntersection(pts, wt, wn, ts); + break; + } + case SkIntersectionHelper::kCubic_Segment: { + swap = true; + pts = ts.intersect(cubic2.set(wn.pts() + SkDEBUGPARAMS(ts.globalState())), + conic1.set(wt.pts(), wt.weight() + SkDEBUGPARAMS(ts.globalState()))); + debugShowCubicConicIntersection(pts, wn, wt, ts); + break; + } + } + break; + case SkIntersectionHelper::kCubic_Segment: + switch (wn.segmentType()) { + case SkIntersectionHelper::kHorizontalLine_Segment: + pts = ts.cubicHorizontal(wt.pts(), wn.left(), + wn.right(), wn.y(), wn.xFlipped()); + debugShowCubicLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kVerticalLine_Segment: + pts = ts.cubicVertical(wt.pts(), wn.top(), + wn.bottom(), wn.x(), wn.yFlipped()); + debugShowCubicLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kLine_Segment: + pts = ts.cubicLine(wt.pts(), wn.pts()); + debugShowCubicLineIntersection(pts, wt, wn, ts); + break; + case SkIntersectionHelper::kQuad_Segment: { + pts = ts.intersect(cubic1.set(wt.pts()), quad2.set(wn.pts())); + debugShowCubicQuadIntersection(pts, wt, wn, ts); + break; + } + case SkIntersectionHelper::kConic_Segment: { + pts = ts.intersect(cubic1.set(wt.pts() + SkDEBUGPARAMS(ts.globalState())), + conic2.set(wn.pts(), wn.weight() + SkDEBUGPARAMS(ts.globalState()))); + debugShowCubicConicIntersection(pts, wt, wn, ts); + break; + } + case SkIntersectionHelper::kCubic_Segment: { + pts = ts.intersect(cubic1.set(wt.pts()), cubic2.set(wn.pts())); + debugShowCubicIntersection(pts, wt, wn, ts); + break; + } + default: + SkASSERT(0); + } + break; + default: + SkASSERT(0); + } +#if DEBUG_T_SECT_LOOP_COUNT + test->globalState()->debugAddLoopCount(&ts, wt, wn); +#endif + int coinIndex = -1; + SkOpPtT* coinPtT[2]; + for (int pt = 0; pt < pts; ++pt) { + SkASSERT(ts[0][pt] >= 0 && ts[0][pt] <= 1); + SkASSERT(ts[1][pt] >= 0 && ts[1][pt] <= 1); + wt.segment()->debugValidate(); + // if t value is used to compute pt in addT, error may creep in and + // rect intersections may result in non-rects. if pt value from intersection + // is passed in, current tests break. As a workaround, pass in pt + // value from intersection only if pt.x and pt.y is integral + SkPoint iPt = ts.pt(pt).asSkPoint(); + bool iPtIsIntegral = iPt.fX == floor(iPt.fX) && iPt.fY == floor(iPt.fY); + SkOpPtT* testTAt = iPtIsIntegral ? wt.segment()->addT(ts[swap][pt], iPt) + : wt.segment()->addT(ts[swap][pt]); + wn.segment()->debugValidate(); + SkOpPtT* nextTAt = iPtIsIntegral ? wn.segment()->addT(ts[!swap][pt], iPt) + : wn.segment()->addT(ts[!swap][pt]); + if (!testTAt->contains(nextTAt)) { + SkOpPtT* oppPrev = testTAt->oppPrev(nextTAt); // Returns nullptr if pair + if (oppPrev) { // already share a pt-t loop. + testTAt->span()->mergeMatches(nextTAt->span()); + testTAt->addOpp(nextTAt, oppPrev); + } + if (testTAt->fPt != nextTAt->fPt) { + testTAt->span()->unaligned(); + nextTAt->span()->unaligned(); + } + wt.segment()->debugValidate(); + wn.segment()->debugValidate(); + } + if (!ts.isCoincident(pt)) { + continue; + } + if (coinIndex < 0) { + coinPtT[0] = testTAt; + coinPtT[1] = nextTAt; + coinIndex = pt; + continue; + } + if (coinPtT[0]->span() == testTAt->span()) { + coinIndex = -1; + continue; + } + if (coinPtT[1]->span() == nextTAt->span()) { + coinIndex = -1; // coincidence span collapsed + continue; + } + if (swap) { + using std::swap; + swap(coinPtT[0], coinPtT[1]); + swap(testTAt, nextTAt); + } + SkASSERT(coincidence->globalState()->debugSkipAssert() + || coinPtT[0]->span()->t() < testTAt->span()->t()); + if (coinPtT[0]->span()->deleted()) { + coinIndex = -1; + continue; + } + if (testTAt->span()->deleted()) { + coinIndex = -1; + continue; + } + coincidence->add(coinPtT[0], testTAt, coinPtT[1], nextTAt); + wt.segment()->debugValidate(); + wn.segment()->debugValidate(); + coinIndex = -1; + } + SkOPOBJASSERT(coincidence, coinIndex < 0); // expect coincidence to be paired + } while (wn.advance()); + } while (wt.advance()); + return true; +} diff --git a/gfx/skia/skia/src/pathops/SkAddIntersections.h b/gfx/skia/skia/src/pathops/SkAddIntersections.h new file mode 100644 index 0000000000..d9a11df254 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkAddIntersections.h @@ -0,0 +1,15 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkAddIntersections_DEFINED +#define SkAddIntersections_DEFINED + +class SkOpCoincidence; +class SkOpContour; + +bool AddIntersectTs(SkOpContour* test, SkOpContour* next, SkOpCoincidence* coincidence); + +#endif diff --git a/gfx/skia/skia/src/pathops/SkDConicLineIntersection.cpp b/gfx/skia/skia/src/pathops/SkDConicLineIntersection.cpp new file mode 100644 index 0000000000..54c8178f7b --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkDConicLineIntersection.cpp @@ -0,0 +1,396 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +class LineConicIntersections { +public: + enum PinTPoint { + kPointUninitialized, + kPointInitialized + }; + + LineConicIntersections(const SkDConic& c, const SkDLine& l, SkIntersections* i) + : fConic(c) + , fLine(&l) + , fIntersections(i) + , fAllowNear(true) { + i->setMax(4); // allow short partial coincidence plus discrete intersection + } + + LineConicIntersections(const SkDConic& c) + : fConic(c) + SkDEBUGPARAMS(fLine(nullptr)) + SkDEBUGPARAMS(fIntersections(nullptr)) + SkDEBUGPARAMS(fAllowNear(false)) { + } + + void allowNear(bool allow) { + fAllowNear = allow; + } + + void checkCoincident() { + int last = fIntersections->used() - 1; + for (int index = 0; index < last; ) { + double conicMidT = ((*fIntersections)[0][index] + (*fIntersections)[0][index + 1]) / 2; + SkDPoint conicMidPt = fConic.ptAtT(conicMidT); + double t = fLine->nearPoint(conicMidPt, nullptr); + if (t < 0) { + ++index; + continue; + } + if (fIntersections->isCoincident(index)) { + fIntersections->removeOne(index); + --last; + } else if (fIntersections->isCoincident(index + 1)) { + fIntersections->removeOne(index + 1); + --last; + } else { + fIntersections->setCoincident(index++); + } + fIntersections->setCoincident(index); + } + } + +#ifdef SK_DEBUG + static bool close_to(double a, double b, const double c[3]) { + double max = std::max(-std::min(std::min(c[0], c[1]), c[2]), std::max(std::max(c[0], c[1]), c[2])); + return approximately_zero_when_compared_to(a - b, max); + } +#endif + int horizontalIntersect(double axisIntercept, double roots[2]) { + double conicVals[] = { fConic[0].fY, fConic[1].fY, fConic[2].fY }; + return this->validT(conicVals, axisIntercept, roots); + } + + int horizontalIntersect(double axisIntercept, double left, double right, bool flipped) { + this->addExactHorizontalEndPoints(left, right, axisIntercept); + if (fAllowNear) { + this->addNearHorizontalEndPoints(left, right, axisIntercept); + } + double roots[2]; + int count = this->horizontalIntersect(axisIntercept, roots); + for (int index = 0; index < count; ++index) { + double conicT = roots[index]; + SkDPoint pt = fConic.ptAtT(conicT); + SkDEBUGCODE(double conicVals[] = { fConic[0].fY, fConic[1].fY, fConic[2].fY }); + SkOPOBJASSERT(fIntersections, close_to(pt.fY, axisIntercept, conicVals)); + double lineT = (pt.fX - left) / (right - left); + if (this->pinTs(&conicT, &lineT, &pt, kPointInitialized) + && this->uniqueAnswer(conicT, pt)) { + fIntersections->insert(conicT, lineT, pt); + } + } + if (flipped) { + fIntersections->flip(); + } + this->checkCoincident(); + return fIntersections->used(); + } + + int intersect() { + this->addExactEndPoints(); + if (fAllowNear) { + this->addNearEndPoints(); + } + double rootVals[2]; + int roots = this->intersectRay(rootVals); + for (int index = 0; index < roots; ++index) { + double conicT = rootVals[index]; + double lineT = this->findLineT(conicT); +#ifdef SK_DEBUG + if (!fIntersections->globalState() + || !fIntersections->globalState()->debugSkipAssert()) { + SkDEBUGCODE(SkDPoint conicPt = fConic.ptAtT(conicT)); + SkDEBUGCODE(SkDPoint linePt = fLine->ptAtT(lineT)); + SkASSERT(conicPt.approximatelyDEqual(linePt)); + } +#endif + SkDPoint pt; + if (this->pinTs(&conicT, &lineT, &pt, kPointUninitialized) + && this->uniqueAnswer(conicT, pt)) { + fIntersections->insert(conicT, lineT, pt); + } + } + this->checkCoincident(); + return fIntersections->used(); + } + + int intersectRay(double roots[2]) { + double adj = (*fLine)[1].fX - (*fLine)[0].fX; + double opp = (*fLine)[1].fY - (*fLine)[0].fY; + double r[3]; + for (int n = 0; n < 3; ++n) { + r[n] = (fConic[n].fY - (*fLine)[0].fY) * adj - (fConic[n].fX - (*fLine)[0].fX) * opp; + } + return this->validT(r, 0, roots); + } + + int validT(double r[3], double axisIntercept, double roots[2]) { + double A = r[2]; + double B = r[1] * fConic.fWeight - axisIntercept * fConic.fWeight + axisIntercept; + double C = r[0]; + A += C - 2 * B; // A = a + c - 2*(b*w - xCept*w + xCept) + B -= C; // B = b*w - w * xCept + xCept - a + C -= axisIntercept; + return SkDQuad::RootsValidT(A, 2 * B, C, roots); + } + + int verticalIntersect(double axisIntercept, double roots[2]) { + double conicVals[] = { fConic[0].fX, fConic[1].fX, fConic[2].fX }; + return this->validT(conicVals, axisIntercept, roots); + } + + int verticalIntersect(double axisIntercept, double top, double bottom, bool flipped) { + this->addExactVerticalEndPoints(top, bottom, axisIntercept); + if (fAllowNear) { + this->addNearVerticalEndPoints(top, bottom, axisIntercept); + } + double roots[2]; + int count = this->verticalIntersect(axisIntercept, roots); + for (int index = 0; index < count; ++index) { + double conicT = roots[index]; + SkDPoint pt = fConic.ptAtT(conicT); + SkDEBUGCODE(double conicVals[] = { fConic[0].fX, fConic[1].fX, fConic[2].fX }); + SkOPOBJASSERT(fIntersections, close_to(pt.fX, axisIntercept, conicVals)); + double lineT = (pt.fY - top) / (bottom - top); + if (this->pinTs(&conicT, &lineT, &pt, kPointInitialized) + && this->uniqueAnswer(conicT, pt)) { + fIntersections->insert(conicT, lineT, pt); + } + } + if (flipped) { + fIntersections->flip(); + } + this->checkCoincident(); + return fIntersections->used(); + } + +protected: +// OPTIMIZE: Functions of the form add .. points are indentical to the conic routines. + // add endpoints first to get zero and one t values exactly + void addExactEndPoints() { + for (int cIndex = 0; cIndex < SkDConic::kPointCount; cIndex += SkDConic::kPointLast) { + double lineT = fLine->exactPoint(fConic[cIndex]); + if (lineT < 0) { + continue; + } + double conicT = (double) (cIndex >> 1); + fIntersections->insert(conicT, lineT, fConic[cIndex]); + } + } + + void addNearEndPoints() { + for (int cIndex = 0; cIndex < SkDConic::kPointCount; cIndex += SkDConic::kPointLast) { + double conicT = (double) (cIndex >> 1); + if (fIntersections->hasT(conicT)) { + continue; + } + double lineT = fLine->nearPoint(fConic[cIndex], nullptr); + if (lineT < 0) { + continue; + } + fIntersections->insert(conicT, lineT, fConic[cIndex]); + } + this->addLineNearEndPoints(); + } + + void addLineNearEndPoints() { + for (int lIndex = 0; lIndex < 2; ++lIndex) { + double lineT = (double) lIndex; + if (fIntersections->hasOppT(lineT)) { + continue; + } + double conicT = ((SkDCurve*) &fConic)->nearPoint(SkPath::kConic_Verb, + (*fLine)[lIndex], (*fLine)[!lIndex]); + if (conicT < 0) { + continue; + } + fIntersections->insert(conicT, lineT, (*fLine)[lIndex]); + } + } + + void addExactHorizontalEndPoints(double left, double right, double y) { + for (int cIndex = 0; cIndex < SkDConic::kPointCount; cIndex += SkDConic::kPointLast) { + double lineT = SkDLine::ExactPointH(fConic[cIndex], left, right, y); + if (lineT < 0) { + continue; + } + double conicT = (double) (cIndex >> 1); + fIntersections->insert(conicT, lineT, fConic[cIndex]); + } + } + + void addNearHorizontalEndPoints(double left, double right, double y) { + for (int cIndex = 0; cIndex < SkDConic::kPointCount; cIndex += SkDConic::kPointLast) { + double conicT = (double) (cIndex >> 1); + if (fIntersections->hasT(conicT)) { + continue; + } + double lineT = SkDLine::NearPointH(fConic[cIndex], left, right, y); + if (lineT < 0) { + continue; + } + fIntersections->insert(conicT, lineT, fConic[cIndex]); + } + this->addLineNearEndPoints(); + } + + void addExactVerticalEndPoints(double top, double bottom, double x) { + for (int cIndex = 0; cIndex < SkDConic::kPointCount; cIndex += SkDConic::kPointLast) { + double lineT = SkDLine::ExactPointV(fConic[cIndex], top, bottom, x); + if (lineT < 0) { + continue; + } + double conicT = (double) (cIndex >> 1); + fIntersections->insert(conicT, lineT, fConic[cIndex]); + } + } + + void addNearVerticalEndPoints(double top, double bottom, double x) { + for (int cIndex = 0; cIndex < SkDConic::kPointCount; cIndex += SkDConic::kPointLast) { + double conicT = (double) (cIndex >> 1); + if (fIntersections->hasT(conicT)) { + continue; + } + double lineT = SkDLine::NearPointV(fConic[cIndex], top, bottom, x); + if (lineT < 0) { + continue; + } + fIntersections->insert(conicT, lineT, fConic[cIndex]); + } + this->addLineNearEndPoints(); + } + + double findLineT(double t) { + SkDPoint xy = fConic.ptAtT(t); + double dx = (*fLine)[1].fX - (*fLine)[0].fX; + double dy = (*fLine)[1].fY - (*fLine)[0].fY; + if (fabs(dx) > fabs(dy)) { + return (xy.fX - (*fLine)[0].fX) / dx; + } + return (xy.fY - (*fLine)[0].fY) / dy; + } + + bool pinTs(double* conicT, double* lineT, SkDPoint* pt, PinTPoint ptSet) { + if (!approximately_one_or_less_double(*lineT)) { + return false; + } + if (!approximately_zero_or_more_double(*lineT)) { + return false; + } + double qT = *conicT = SkPinT(*conicT); + double lT = *lineT = SkPinT(*lineT); + if (lT == 0 || lT == 1 || (ptSet == kPointUninitialized && qT != 0 && qT != 1)) { + *pt = (*fLine).ptAtT(lT); + } else if (ptSet == kPointUninitialized) { + *pt = fConic.ptAtT(qT); + } + SkPoint gridPt = pt->asSkPoint(); + if (SkDPoint::ApproximatelyEqual(gridPt, (*fLine)[0].asSkPoint())) { + *pt = (*fLine)[0]; + *lineT = 0; + } else if (SkDPoint::ApproximatelyEqual(gridPt, (*fLine)[1].asSkPoint())) { + *pt = (*fLine)[1]; + *lineT = 1; + } + if (fIntersections->used() > 0 && approximately_equal((*fIntersections)[1][0], *lineT)) { + return false; + } + if (gridPt == fConic[0].asSkPoint()) { + *pt = fConic[0]; + *conicT = 0; + } else if (gridPt == fConic[2].asSkPoint()) { + *pt = fConic[2]; + *conicT = 1; + } + return true; + } + + bool uniqueAnswer(double conicT, const SkDPoint& pt) { + for (int inner = 0; inner < fIntersections->used(); ++inner) { + if (fIntersections->pt(inner) != pt) { + continue; + } + double existingConicT = (*fIntersections)[0][inner]; + if (conicT == existingConicT) { + return false; + } + // check if midway on conic is also same point. If so, discard this + double conicMidT = (existingConicT + conicT) / 2; + SkDPoint conicMidPt = fConic.ptAtT(conicMidT); + if (conicMidPt.approximatelyEqual(pt)) { + return false; + } + } +#if ONE_OFF_DEBUG + SkDPoint qPt = fConic.ptAtT(conicT); + SkDebugf("%s pt=(%1.9g,%1.9g) cPt=(%1.9g,%1.9g)\n", __FUNCTION__, pt.fX, pt.fY, + qPt.fX, qPt.fY); +#endif + return true; + } + +private: + const SkDConic& fConic; + const SkDLine* fLine; + SkIntersections* fIntersections; + bool fAllowNear; +}; + +int SkIntersections::horizontal(const SkDConic& conic, double left, double right, double y, + bool flipped) { + SkDLine line = {{{ left, y }, { right, y }}}; + LineConicIntersections c(conic, line, this); + return c.horizontalIntersect(y, left, right, flipped); +} + +int SkIntersections::vertical(const SkDConic& conic, double top, double bottom, double x, + bool flipped) { + SkDLine line = {{{ x, top }, { x, bottom }}}; + LineConicIntersections c(conic, line, this); + return c.verticalIntersect(x, top, bottom, flipped); +} + +int SkIntersections::intersect(const SkDConic& conic, const SkDLine& line) { + LineConicIntersections c(conic, line, this); + c.allowNear(fAllowNear); + return c.intersect(); +} + +int SkIntersections::intersectRay(const SkDConic& conic, const SkDLine& line) { + LineConicIntersections c(conic, line, this); + fUsed = c.intersectRay(fT[0]); + for (int index = 0; index < fUsed; ++index) { + fPt[index] = conic.ptAtT(fT[0][index]); + } + return fUsed; +} + +int SkIntersections::HorizontalIntercept(const SkDConic& conic, SkScalar y, double* roots) { + LineConicIntersections c(conic); + return c.horizontalIntersect(y, roots); +} + +int SkIntersections::VerticalIntercept(const SkDConic& conic, SkScalar x, double* roots) { + LineConicIntersections c(conic); + return c.verticalIntersect(x, roots); +} diff --git a/gfx/skia/skia/src/pathops/SkDCubicLineIntersection.cpp b/gfx/skia/skia/src/pathops/SkDCubicLineIntersection.cpp new file mode 100644 index 0000000000..e6c286058f --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkDCubicLineIntersection.cpp @@ -0,0 +1,464 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include + +/* +Find the intersection of a line and cubic by solving for valid t values. + +Analogous to line-quadratic intersection, solve line-cubic intersection by +representing the cubic as: + x = a(1-t)^3 + 2b(1-t)^2t + c(1-t)t^2 + dt^3 + y = e(1-t)^3 + 2f(1-t)^2t + g(1-t)t^2 + ht^3 +and the line as: + y = i*x + j (if the line is more horizontal) +or: + x = i*y + j (if the line is more vertical) + +Then using Mathematica, solve for the values of t where the cubic intersects the +line: + + (in) Resultant[ + a*(1 - t)^3 + 3*b*(1 - t)^2*t + 3*c*(1 - t)*t^2 + d*t^3 - x, + e*(1 - t)^3 + 3*f*(1 - t)^2*t + 3*g*(1 - t)*t^2 + h*t^3 - i*x - j, x] + (out) -e + j + + 3 e t - 3 f t - + 3 e t^2 + 6 f t^2 - 3 g t^2 + + e t^3 - 3 f t^3 + 3 g t^3 - h t^3 + + i ( a - + 3 a t + 3 b t + + 3 a t^2 - 6 b t^2 + 3 c t^2 - + a t^3 + 3 b t^3 - 3 c t^3 + d t^3 ) + +if i goes to infinity, we can rewrite the line in terms of x. Mathematica: + + (in) Resultant[ + a*(1 - t)^3 + 3*b*(1 - t)^2*t + 3*c*(1 - t)*t^2 + d*t^3 - i*y - j, + e*(1 - t)^3 + 3*f*(1 - t)^2*t + 3*g*(1 - t)*t^2 + h*t^3 - y, y] + (out) a - j - + 3 a t + 3 b t + + 3 a t^2 - 6 b t^2 + 3 c t^2 - + a t^3 + 3 b t^3 - 3 c t^3 + d t^3 - + i ( e - + 3 e t + 3 f t + + 3 e t^2 - 6 f t^2 + 3 g t^2 - + e t^3 + 3 f t^3 - 3 g t^3 + h t^3 ) + +Solving this with Mathematica produces an expression with hundreds of terms; +instead, use Numeric Solutions recipe to solve the cubic. + +The near-horizontal case, in terms of: Ax^3 + Bx^2 + Cx + D == 0 + A = (-(-e + 3*f - 3*g + h) + i*(-a + 3*b - 3*c + d) ) + B = 3*(-( e - 2*f + g ) + i*( a - 2*b + c ) ) + C = 3*(-(-e + f ) + i*(-a + b ) ) + D = (-( e ) + i*( a ) + j ) + +The near-vertical case, in terms of: Ax^3 + Bx^2 + Cx + D == 0 + A = ( (-a + 3*b - 3*c + d) - i*(-e + 3*f - 3*g + h) ) + B = 3*( ( a - 2*b + c ) - i*( e - 2*f + g ) ) + C = 3*( (-a + b ) - i*(-e + f ) ) + D = ( ( a ) - i*( e ) - j ) + +For horizontal lines: +(in) Resultant[ + a*(1 - t)^3 + 3*b*(1 - t)^2*t + 3*c*(1 - t)*t^2 + d*t^3 - j, + e*(1 - t)^3 + 3*f*(1 - t)^2*t + 3*g*(1 - t)*t^2 + h*t^3 - y, y] +(out) e - j - + 3 e t + 3 f t + + 3 e t^2 - 6 f t^2 + 3 g t^2 - + e t^3 + 3 f t^3 - 3 g t^3 + h t^3 + */ + +class LineCubicIntersections { +public: + enum PinTPoint { + kPointUninitialized, + kPointInitialized + }; + + LineCubicIntersections(const SkDCubic& c, const SkDLine& l, SkIntersections* i) + : fCubic(c) + , fLine(l) + , fIntersections(i) + , fAllowNear(true) { + i->setMax(4); + } + + void allowNear(bool allow) { + fAllowNear = allow; + } + + void checkCoincident() { + int last = fIntersections->used() - 1; + for (int index = 0; index < last; ) { + double cubicMidT = ((*fIntersections)[0][index] + (*fIntersections)[0][index + 1]) / 2; + SkDPoint cubicMidPt = fCubic.ptAtT(cubicMidT); + double t = fLine.nearPoint(cubicMidPt, nullptr); + if (t < 0) { + ++index; + continue; + } + if (fIntersections->isCoincident(index)) { + fIntersections->removeOne(index); + --last; + } else if (fIntersections->isCoincident(index + 1)) { + fIntersections->removeOne(index + 1); + --last; + } else { + fIntersections->setCoincident(index++); + } + fIntersections->setCoincident(index); + } + } + + // see parallel routine in line quadratic intersections + int intersectRay(double roots[3]) { + double adj = fLine[1].fX - fLine[0].fX; + double opp = fLine[1].fY - fLine[0].fY; + SkDCubic c; + SkDEBUGCODE(c.fDebugGlobalState = fIntersections->globalState()); + for (int n = 0; n < 4; ++n) { + c[n].fX = (fCubic[n].fY - fLine[0].fY) * adj - (fCubic[n].fX - fLine[0].fX) * opp; + } + double A, B, C, D; + SkDCubic::Coefficients(&c[0].fX, &A, &B, &C, &D); + int count = SkDCubic::RootsValidT(A, B, C, D, roots); + for (int index = 0; index < count; ++index) { + SkDPoint calcPt = c.ptAtT(roots[index]); + if (!approximately_zero(calcPt.fX)) { + for (int n = 0; n < 4; ++n) { + c[n].fY = (fCubic[n].fY - fLine[0].fY) * opp + + (fCubic[n].fX - fLine[0].fX) * adj; + } + double extremeTs[6]; + int extrema = SkDCubic::FindExtrema(&c[0].fX, extremeTs); + count = c.searchRoots(extremeTs, extrema, 0, SkDCubic::kXAxis, roots); + break; + } + } + return count; + } + + int intersect() { + addExactEndPoints(); + if (fAllowNear) { + addNearEndPoints(); + } + double rootVals[3]; + int roots = intersectRay(rootVals); + for (int index = 0; index < roots; ++index) { + double cubicT = rootVals[index]; + double lineT = findLineT(cubicT); + SkDPoint pt; + if (pinTs(&cubicT, &lineT, &pt, kPointUninitialized) && uniqueAnswer(cubicT, pt)) { + fIntersections->insert(cubicT, lineT, pt); + } + } + checkCoincident(); + return fIntersections->used(); + } + + static int HorizontalIntersect(const SkDCubic& c, double axisIntercept, double roots[3]) { + double A, B, C, D; + SkDCubic::Coefficients(&c[0].fY, &A, &B, &C, &D); + D -= axisIntercept; + int count = SkDCubic::RootsValidT(A, B, C, D, roots); + for (int index = 0; index < count; ++index) { + SkDPoint calcPt = c.ptAtT(roots[index]); + if (!approximately_equal(calcPt.fY, axisIntercept)) { + double extremeTs[6]; + int extrema = SkDCubic::FindExtrema(&c[0].fY, extremeTs); + count = c.searchRoots(extremeTs, extrema, axisIntercept, SkDCubic::kYAxis, roots); + break; + } + } + return count; + } + + int horizontalIntersect(double axisIntercept, double left, double right, bool flipped) { + addExactHorizontalEndPoints(left, right, axisIntercept); + if (fAllowNear) { + addNearHorizontalEndPoints(left, right, axisIntercept); + } + double roots[3]; + int count = HorizontalIntersect(fCubic, axisIntercept, roots); + for (int index = 0; index < count; ++index) { + double cubicT = roots[index]; + SkDPoint pt = { fCubic.ptAtT(cubicT).fX, axisIntercept }; + double lineT = (pt.fX - left) / (right - left); + if (pinTs(&cubicT, &lineT, &pt, kPointInitialized) && uniqueAnswer(cubicT, pt)) { + fIntersections->insert(cubicT, lineT, pt); + } + } + if (flipped) { + fIntersections->flip(); + } + checkCoincident(); + return fIntersections->used(); + } + + bool uniqueAnswer(double cubicT, const SkDPoint& pt) { + for (int inner = 0; inner < fIntersections->used(); ++inner) { + if (fIntersections->pt(inner) != pt) { + continue; + } + double existingCubicT = (*fIntersections)[0][inner]; + if (cubicT == existingCubicT) { + return false; + } + // check if midway on cubic is also same point. If so, discard this + double cubicMidT = (existingCubicT + cubicT) / 2; + SkDPoint cubicMidPt = fCubic.ptAtT(cubicMidT); + if (cubicMidPt.approximatelyEqual(pt)) { + return false; + } + } +#if ONE_OFF_DEBUG + SkDPoint cPt = fCubic.ptAtT(cubicT); + SkDebugf("%s pt=(%1.9g,%1.9g) cPt=(%1.9g,%1.9g)\n", __FUNCTION__, pt.fX, pt.fY, + cPt.fX, cPt.fY); +#endif + return true; + } + + static int VerticalIntersect(const SkDCubic& c, double axisIntercept, double roots[3]) { + double A, B, C, D; + SkDCubic::Coefficients(&c[0].fX, &A, &B, &C, &D); + D -= axisIntercept; + int count = SkDCubic::RootsValidT(A, B, C, D, roots); + for (int index = 0; index < count; ++index) { + SkDPoint calcPt = c.ptAtT(roots[index]); + if (!approximately_equal(calcPt.fX, axisIntercept)) { + double extremeTs[6]; + int extrema = SkDCubic::FindExtrema(&c[0].fX, extremeTs); + count = c.searchRoots(extremeTs, extrema, axisIntercept, SkDCubic::kXAxis, roots); + break; + } + } + return count; + } + + int verticalIntersect(double axisIntercept, double top, double bottom, bool flipped) { + addExactVerticalEndPoints(top, bottom, axisIntercept); + if (fAllowNear) { + addNearVerticalEndPoints(top, bottom, axisIntercept); + } + double roots[3]; + int count = VerticalIntersect(fCubic, axisIntercept, roots); + for (int index = 0; index < count; ++index) { + double cubicT = roots[index]; + SkDPoint pt = { axisIntercept, fCubic.ptAtT(cubicT).fY }; + double lineT = (pt.fY - top) / (bottom - top); + if (pinTs(&cubicT, &lineT, &pt, kPointInitialized) && uniqueAnswer(cubicT, pt)) { + fIntersections->insert(cubicT, lineT, pt); + } + } + if (flipped) { + fIntersections->flip(); + } + checkCoincident(); + return fIntersections->used(); + } + + protected: + + void addExactEndPoints() { + for (int cIndex = 0; cIndex < 4; cIndex += 3) { + double lineT = fLine.exactPoint(fCubic[cIndex]); + if (lineT < 0) { + continue; + } + double cubicT = (double) (cIndex >> 1); + fIntersections->insert(cubicT, lineT, fCubic[cIndex]); + } + } + + /* Note that this does not look for endpoints of the line that are near the cubic. + These points are found later when check ends looks for missing points */ + void addNearEndPoints() { + for (int cIndex = 0; cIndex < 4; cIndex += 3) { + double cubicT = (double) (cIndex >> 1); + if (fIntersections->hasT(cubicT)) { + continue; + } + double lineT = fLine.nearPoint(fCubic[cIndex], nullptr); + if (lineT < 0) { + continue; + } + fIntersections->insert(cubicT, lineT, fCubic[cIndex]); + } + this->addLineNearEndPoints(); + } + + void addLineNearEndPoints() { + for (int lIndex = 0; lIndex < 2; ++lIndex) { + double lineT = (double) lIndex; + if (fIntersections->hasOppT(lineT)) { + continue; + } + double cubicT = ((SkDCurve*) &fCubic)->nearPoint(SkPath::kCubic_Verb, + fLine[lIndex], fLine[!lIndex]); + if (cubicT < 0) { + continue; + } + fIntersections->insert(cubicT, lineT, fLine[lIndex]); + } + } + + void addExactHorizontalEndPoints(double left, double right, double y) { + for (int cIndex = 0; cIndex < 4; cIndex += 3) { + double lineT = SkDLine::ExactPointH(fCubic[cIndex], left, right, y); + if (lineT < 0) { + continue; + } + double cubicT = (double) (cIndex >> 1); + fIntersections->insert(cubicT, lineT, fCubic[cIndex]); + } + } + + void addNearHorizontalEndPoints(double left, double right, double y) { + for (int cIndex = 0; cIndex < 4; cIndex += 3) { + double cubicT = (double) (cIndex >> 1); + if (fIntersections->hasT(cubicT)) { + continue; + } + double lineT = SkDLine::NearPointH(fCubic[cIndex], left, right, y); + if (lineT < 0) { + continue; + } + fIntersections->insert(cubicT, lineT, fCubic[cIndex]); + } + this->addLineNearEndPoints(); + } + + void addExactVerticalEndPoints(double top, double bottom, double x) { + for (int cIndex = 0; cIndex < 4; cIndex += 3) { + double lineT = SkDLine::ExactPointV(fCubic[cIndex], top, bottom, x); + if (lineT < 0) { + continue; + } + double cubicT = (double) (cIndex >> 1); + fIntersections->insert(cubicT, lineT, fCubic[cIndex]); + } + } + + void addNearVerticalEndPoints(double top, double bottom, double x) { + for (int cIndex = 0; cIndex < 4; cIndex += 3) { + double cubicT = (double) (cIndex >> 1); + if (fIntersections->hasT(cubicT)) { + continue; + } + double lineT = SkDLine::NearPointV(fCubic[cIndex], top, bottom, x); + if (lineT < 0) { + continue; + } + fIntersections->insert(cubicT, lineT, fCubic[cIndex]); + } + this->addLineNearEndPoints(); + } + + double findLineT(double t) { + SkDPoint xy = fCubic.ptAtT(t); + double dx = fLine[1].fX - fLine[0].fX; + double dy = fLine[1].fY - fLine[0].fY; + if (fabs(dx) > fabs(dy)) { + return (xy.fX - fLine[0].fX) / dx; + } + return (xy.fY - fLine[0].fY) / dy; + } + + bool pinTs(double* cubicT, double* lineT, SkDPoint* pt, PinTPoint ptSet) { + if (!approximately_one_or_less(*lineT)) { + return false; + } + if (!approximately_zero_or_more(*lineT)) { + return false; + } + double cT = *cubicT = SkPinT(*cubicT); + double lT = *lineT = SkPinT(*lineT); + SkDPoint lPt = fLine.ptAtT(lT); + SkDPoint cPt = fCubic.ptAtT(cT); + if (!lPt.roughlyEqual(cPt)) { + return false; + } + // FIXME: if points are roughly equal but not approximately equal, need to do + // a binary search like quad/quad intersection to find more precise t values + if (lT == 0 || lT == 1 || (ptSet == kPointUninitialized && cT != 0 && cT != 1)) { + *pt = lPt; + } else if (ptSet == kPointUninitialized) { + *pt = cPt; + } + SkPoint gridPt = pt->asSkPoint(); + if (gridPt == fLine[0].asSkPoint()) { + *lineT = 0; + } else if (gridPt == fLine[1].asSkPoint()) { + *lineT = 1; + } + if (gridPt == fCubic[0].asSkPoint() && approximately_equal(*cubicT, 0)) { + *cubicT = 0; + } else if (gridPt == fCubic[3].asSkPoint() && approximately_equal(*cubicT, 1)) { + *cubicT = 1; + } + return true; + } + +private: + const SkDCubic& fCubic; + const SkDLine& fLine; + SkIntersections* fIntersections; + bool fAllowNear; +}; + +int SkIntersections::horizontal(const SkDCubic& cubic, double left, double right, double y, + bool flipped) { + SkDLine line = {{{ left, y }, { right, y }}}; + LineCubicIntersections c(cubic, line, this); + return c.horizontalIntersect(y, left, right, flipped); +} + +int SkIntersections::vertical(const SkDCubic& cubic, double top, double bottom, double x, + bool flipped) { + SkDLine line = {{{ x, top }, { x, bottom }}}; + LineCubicIntersections c(cubic, line, this); + return c.verticalIntersect(x, top, bottom, flipped); +} + +int SkIntersections::intersect(const SkDCubic& cubic, const SkDLine& line) { + LineCubicIntersections c(cubic, line, this); + c.allowNear(fAllowNear); + return c.intersect(); +} + +int SkIntersections::intersectRay(const SkDCubic& cubic, const SkDLine& line) { + LineCubicIntersections c(cubic, line, this); + fUsed = c.intersectRay(fT[0]); + for (int index = 0; index < fUsed; ++index) { + fPt[index] = cubic.ptAtT(fT[0][index]); + } + return fUsed; +} + +// SkDCubic accessors to Intersection utilities + +int SkDCubic::horizontalIntersect(double yIntercept, double roots[3]) const { + return LineCubicIntersections::HorizontalIntersect(*this, yIntercept, roots); +} + +int SkDCubic::verticalIntersect(double xIntercept, double roots[3]) const { + return LineCubicIntersections::VerticalIntersect(*this, xIntercept, roots); +} diff --git a/gfx/skia/skia/src/pathops/SkDCubicToQuads.cpp b/gfx/skia/skia/src/pathops/SkDCubicToQuads.cpp new file mode 100644 index 0000000000..c7c7944580 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkDCubicToQuads.cpp @@ -0,0 +1,45 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* +http://stackoverflow.com/questions/2009160/how-do-i-convert-the-2-control-points-of-a-cubic-curve-to-the-single-control-poi +*/ + +/* +Let's call the control points of the cubic Q0..Q3 and the control points of the quadratic P0..P2. +Then for degree elevation, the equations are: + +Q0 = P0 +Q1 = 1/3 P0 + 2/3 P1 +Q2 = 2/3 P1 + 1/3 P2 +Q3 = P2 +In your case you have Q0..Q3 and you're solving for P0..P2. There are two ways to compute P1 from + the equations above: + +P1 = 3/2 Q1 - 1/2 Q0 +P1 = 3/2 Q2 - 1/2 Q3 +If this is a degree-elevated cubic, then both equations will give the same answer for P1. Since + it's likely not, your best bet is to average them. So, + +P1 = -1/4 Q0 + 3/4 Q1 + 3/4 Q2 - 1/4 Q3 +*/ + +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" + +// used for testing only +SkDQuad SkDCubic::toQuad() const { + SkDQuad quad; + quad[0] = fPts[0]; + const SkDPoint fromC1 = {(3 * fPts[1].fX - fPts[0].fX) / 2, (3 * fPts[1].fY - fPts[0].fY) / 2}; + const SkDPoint fromC2 = {(3 * fPts[2].fX - fPts[3].fX) / 2, (3 * fPts[2].fY - fPts[3].fY) / 2}; + quad[1].fX = (fromC1.fX + fromC2.fX) / 2; + quad[1].fY = (fromC1.fY + fromC2.fY) / 2; + quad[2] = fPts[3]; + return quad; +} diff --git a/gfx/skia/skia/src/pathops/SkDLineIntersection.cpp b/gfx/skia/skia/src/pathops/SkDLineIntersection.cpp new file mode 100644 index 0000000000..2660786f9c --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkDLineIntersection.cpp @@ -0,0 +1,344 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkTypes.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include +#include + +void SkIntersections::cleanUpParallelLines(bool parallel) { + while (fUsed > 2) { + removeOne(1); + } + if (fUsed == 2 && !parallel) { + bool startMatch = fT[0][0] == 0 || zero_or_one(fT[1][0]); + bool endMatch = fT[0][1] == 1 || zero_or_one(fT[1][1]); + if ((!startMatch && !endMatch) || approximately_equal(fT[0][0], fT[0][1])) { + SkASSERT(startMatch || endMatch); + if (startMatch && endMatch && (fT[0][0] != 0 || !zero_or_one(fT[1][0])) + && fT[0][1] == 1 && zero_or_one(fT[1][1])) { + removeOne(0); + } else { + removeOne(endMatch); + } + } + } + if (fUsed == 2) { + fIsCoincident[0] = fIsCoincident[1] = 0x03; + } +} + +void SkIntersections::computePoints(const SkDLine& line, int used) { + fPt[0] = line.ptAtT(fT[0][0]); + if ((fUsed = used) == 2) { + fPt[1] = line.ptAtT(fT[0][1]); + } +} + +int SkIntersections::intersectRay(const SkDLine& a, const SkDLine& b) { + fMax = 2; + SkDVector aLen = a[1] - a[0]; + SkDVector bLen = b[1] - b[0]; + /* Slopes match when denom goes to zero: + axLen / ayLen == bxLen / byLen + (ayLen * byLen) * axLen / ayLen == (ayLen * byLen) * bxLen / byLen + byLen * axLen == ayLen * bxLen + byLen * axLen - ayLen * bxLen == 0 ( == denom ) + */ + double denom = bLen.fY * aLen.fX - aLen.fY * bLen.fX; + int used; + if (!approximately_zero(denom)) { + SkDVector ab0 = a[0] - b[0]; + double numerA = ab0.fY * bLen.fX - bLen.fY * ab0.fX; + double numerB = ab0.fY * aLen.fX - aLen.fY * ab0.fX; + numerA /= denom; + numerB /= denom; + fT[0][0] = numerA; + fT[1][0] = numerB; + used = 1; + } else { + /* See if the axis intercepts match: + ay - ax * ayLen / axLen == by - bx * ayLen / axLen + axLen * (ay - ax * ayLen / axLen) == axLen * (by - bx * ayLen / axLen) + axLen * ay - ax * ayLen == axLen * by - bx * ayLen + */ + if (!AlmostEqualUlps(aLen.fX * a[0].fY - aLen.fY * a[0].fX, + aLen.fX * b[0].fY - aLen.fY * b[0].fX)) { + return fUsed = 0; + } + // there's no great answer for intersection points for coincident rays, but return something + fT[0][0] = fT[1][0] = 0; + fT[1][0] = fT[1][1] = 1; + used = 2; + } + computePoints(a, used); + return fUsed; +} + +// note that this only works if both lines are neither horizontal nor vertical +int SkIntersections::intersect(const SkDLine& a, const SkDLine& b) { + fMax = 3; // note that we clean up so that there is no more than two in the end + // see if end points intersect the opposite line + double t; + for (int iA = 0; iA < 2; ++iA) { + if ((t = b.exactPoint(a[iA])) >= 0) { + insert(iA, t, a[iA]); + } + } + for (int iB = 0; iB < 2; ++iB) { + if ((t = a.exactPoint(b[iB])) >= 0) { + insert(t, iB, b[iB]); + } + } + /* Determine the intersection point of two line segments + Return FALSE if the lines don't intersect + from: http://paulbourke.net/geometry/lineline2d/ */ + double axLen = a[1].fX - a[0].fX; + double ayLen = a[1].fY - a[0].fY; + double bxLen = b[1].fX - b[0].fX; + double byLen = b[1].fY - b[0].fY; + /* Slopes match when denom goes to zero: + axLen / ayLen == bxLen / byLen + (ayLen * byLen) * axLen / ayLen == (ayLen * byLen) * bxLen / byLen + byLen * axLen == ayLen * bxLen + byLen * axLen - ayLen * bxLen == 0 ( == denom ) + */ + double axByLen = axLen * byLen; + double ayBxLen = ayLen * bxLen; + // detect parallel lines the same way here and in SkOpAngle operator < + // so that non-parallel means they are also sortable + bool unparallel = fAllowNear ? NotAlmostEqualUlps_Pin(axByLen, ayBxLen) + : NotAlmostDequalUlps(axByLen, ayBxLen); + if (unparallel && fUsed == 0) { + double ab0y = a[0].fY - b[0].fY; + double ab0x = a[0].fX - b[0].fX; + double numerA = ab0y * bxLen - byLen * ab0x; + double numerB = ab0y * axLen - ayLen * ab0x; + double denom = axByLen - ayBxLen; + if (between(0, numerA, denom) && between(0, numerB, denom)) { + fT[0][0] = numerA / denom; + fT[1][0] = numerB / denom; + computePoints(a, 1); + } + } +/* Allow tracking that both sets of end points are near each other -- the lines are entirely + coincident -- even when the end points are not exactly the same. + Mark this as a 'wild card' for the end points, so that either point is considered totally + coincident. Then, avoid folding the lines over each other, but allow either end to mate + to the next set of lines. + */ + if (fAllowNear || !unparallel) { + double aNearB[2]; + double bNearA[2]; + bool aNotB[2] = {false, false}; + bool bNotA[2] = {false, false}; + int nearCount = 0; + for (int index = 0; index < 2; ++index) { + aNearB[index] = t = b.nearPoint(a[index], &aNotB[index]); + nearCount += t >= 0; + bNearA[index] = t = a.nearPoint(b[index], &bNotA[index]); + nearCount += t >= 0; + } + if (nearCount > 0) { + // Skip if each segment contributes to one end point. + if (nearCount != 2 || aNotB[0] == aNotB[1]) { + for (int iA = 0; iA < 2; ++iA) { + if (!aNotB[iA]) { + continue; + } + int nearer = aNearB[iA] > 0.5; + if (!bNotA[nearer]) { + continue; + } + SkASSERT(a[iA] != b[nearer]); + SkOPASSERT(iA == (bNearA[nearer] > 0.5)); + insertNear(iA, nearer, a[iA], b[nearer]); + aNearB[iA] = -1; + bNearA[nearer] = -1; + nearCount -= 2; + } + } + if (nearCount > 0) { + for (int iA = 0; iA < 2; ++iA) { + if (aNearB[iA] >= 0) { + insert(iA, aNearB[iA], a[iA]); + } + } + for (int iB = 0; iB < 2; ++iB) { + if (bNearA[iB] >= 0) { + insert(bNearA[iB], iB, b[iB]); + } + } + } + } + } + cleanUpParallelLines(!unparallel); + SkASSERT(fUsed <= 2); + return fUsed; +} + +static int horizontal_coincident(const SkDLine& line, double y) { + double min = line[0].fY; + double max = line[1].fY; + if (min > max) { + using std::swap; + swap(min, max); + } + if (min > y || max < y) { + return 0; + } + if (AlmostEqualUlps(min, max) && max - min < fabs(line[0].fX - line[1].fX)) { + return 2; + } + return 1; +} + +double SkIntersections::HorizontalIntercept(const SkDLine& line, double y) { + SkASSERT(line[1].fY != line[0].fY); + return SkPinT((y - line[0].fY) / (line[1].fY - line[0].fY)); +} + +int SkIntersections::horizontal(const SkDLine& line, double left, double right, + double y, bool flipped) { + fMax = 3; // clean up parallel at the end will limit the result to 2 at the most + // see if end points intersect the opposite line + double t; + const SkDPoint leftPt = { left, y }; + if ((t = line.exactPoint(leftPt)) >= 0) { + insert(t, (double) flipped, leftPt); + } + if (left != right) { + const SkDPoint rightPt = { right, y }; + if ((t = line.exactPoint(rightPt)) >= 0) { + insert(t, (double) !flipped, rightPt); + } + for (int index = 0; index < 2; ++index) { + if ((t = SkDLine::ExactPointH(line[index], left, right, y)) >= 0) { + insert((double) index, flipped ? 1 - t : t, line[index]); + } + } + } + int result = horizontal_coincident(line, y); + if (result == 1 && fUsed == 0) { + fT[0][0] = HorizontalIntercept(line, y); + double xIntercept = line[0].fX + fT[0][0] * (line[1].fX - line[0].fX); + if (between(left, xIntercept, right)) { + fT[1][0] = (xIntercept - left) / (right - left); + if (flipped) { + // OPTIMIZATION: ? instead of swapping, pass original line, use [1].fX - [0].fX + for (int index = 0; index < result; ++index) { + fT[1][index] = 1 - fT[1][index]; + } + } + fPt[0].fX = xIntercept; + fPt[0].fY = y; + fUsed = 1; + } + } + if (fAllowNear || result == 2) { + if ((t = line.nearPoint(leftPt, nullptr)) >= 0) { + insert(t, (double) flipped, leftPt); + } + if (left != right) { + const SkDPoint rightPt = { right, y }; + if ((t = line.nearPoint(rightPt, nullptr)) >= 0) { + insert(t, (double) !flipped, rightPt); + } + for (int index = 0; index < 2; ++index) { + if ((t = SkDLine::NearPointH(line[index], left, right, y)) >= 0) { + insert((double) index, flipped ? 1 - t : t, line[index]); + } + } + } + } + cleanUpParallelLines(result == 2); + return fUsed; +} + +static int vertical_coincident(const SkDLine& line, double x) { + double min = line[0].fX; + double max = line[1].fX; + if (min > max) { + using std::swap; + swap(min, max); + } + if (!precisely_between(min, x, max)) { + return 0; + } + if (AlmostEqualUlps(min, max)) { + return 2; + } + return 1; +} + +double SkIntersections::VerticalIntercept(const SkDLine& line, double x) { + SkASSERT(line[1].fX != line[0].fX); + return SkPinT((x - line[0].fX) / (line[1].fX - line[0].fX)); +} + +int SkIntersections::vertical(const SkDLine& line, double top, double bottom, + double x, bool flipped) { + fMax = 3; // cleanup parallel lines will bring this back line + // see if end points intersect the opposite line + double t; + SkDPoint topPt = { x, top }; + if ((t = line.exactPoint(topPt)) >= 0) { + insert(t, (double) flipped, topPt); + } + if (top != bottom) { + SkDPoint bottomPt = { x, bottom }; + if ((t = line.exactPoint(bottomPt)) >= 0) { + insert(t, (double) !flipped, bottomPt); + } + for (int index = 0; index < 2; ++index) { + if ((t = SkDLine::ExactPointV(line[index], top, bottom, x)) >= 0) { + insert((double) index, flipped ? 1 - t : t, line[index]); + } + } + } + int result = vertical_coincident(line, x); + if (result == 1 && fUsed == 0) { + fT[0][0] = VerticalIntercept(line, x); + double yIntercept = line[0].fY + fT[0][0] * (line[1].fY - line[0].fY); + if (between(top, yIntercept, bottom)) { + fT[1][0] = (yIntercept - top) / (bottom - top); + if (flipped) { + // OPTIMIZATION: instead of swapping, pass original line, use [1].fY - [0].fY + for (int index = 0; index < result; ++index) { + fT[1][index] = 1 - fT[1][index]; + } + } + fPt[0].fX = x; + fPt[0].fY = yIntercept; + fUsed = 1; + } + } + if (fAllowNear || result == 2) { + if ((t = line.nearPoint(topPt, nullptr)) >= 0) { + insert(t, (double) flipped, topPt); + } + if (top != bottom) { + SkDPoint bottomPt = { x, bottom }; + if ((t = line.nearPoint(bottomPt, nullptr)) >= 0) { + insert(t, (double) !flipped, bottomPt); + } + for (int index = 0; index < 2; ++index) { + if ((t = SkDLine::NearPointV(line[index], top, bottom, x)) >= 0) { + insert((double) index, flipped ? 1 - t : t, line[index]); + } + } + } + } + cleanUpParallelLines(result == 2); + SkASSERT(fUsed <= 2); + return fUsed; +} + diff --git a/gfx/skia/skia/src/pathops/SkDQuadLineIntersection.cpp b/gfx/skia/skia/src/pathops/SkDQuadLineIntersection.cpp new file mode 100644 index 0000000000..2caeaeb8d7 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkDQuadLineIntersection.cpp @@ -0,0 +1,478 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include + +/* +Find the intersection of a line and quadratic by solving for valid t values. + +From http://stackoverflow.com/questions/1853637/how-to-find-the-mathematical-function-defining-a-bezier-curve + +"A Bezier curve is a parametric function. A quadratic Bezier curve (i.e. three +control points) can be expressed as: F(t) = A(1 - t)^2 + B(1 - t)t + Ct^2 where +A, B and C are points and t goes from zero to one. + +This will give you two equations: + + x = a(1 - t)^2 + b(1 - t)t + ct^2 + y = d(1 - t)^2 + e(1 - t)t + ft^2 + +If you add for instance the line equation (y = kx + m) to that, you'll end up +with three equations and three unknowns (x, y and t)." + +Similar to above, the quadratic is represented as + x = a(1-t)^2 + 2b(1-t)t + ct^2 + y = d(1-t)^2 + 2e(1-t)t + ft^2 +and the line as + y = g*x + h + +Using Mathematica, solve for the values of t where the quadratic intersects the +line: + + (in) t1 = Resultant[a*(1 - t)^2 + 2*b*(1 - t)*t + c*t^2 - x, + d*(1 - t)^2 + 2*e*(1 - t)*t + f*t^2 - g*x - h, x] + (out) -d + h + 2 d t - 2 e t - d t^2 + 2 e t^2 - f t^2 + + g (a - 2 a t + 2 b t + a t^2 - 2 b t^2 + c t^2) + (in) Solve[t1 == 0, t] + (out) { + {t -> (-2 d + 2 e + 2 a g - 2 b g - + Sqrt[(2 d - 2 e - 2 a g + 2 b g)^2 - + 4 (-d + 2 e - f + a g - 2 b g + c g) (-d + a g + h)]) / + (2 (-d + 2 e - f + a g - 2 b g + c g)) + }, + {t -> (-2 d + 2 e + 2 a g - 2 b g + + Sqrt[(2 d - 2 e - 2 a g + 2 b g)^2 - + 4 (-d + 2 e - f + a g - 2 b g + c g) (-d + a g + h)]) / + (2 (-d + 2 e - f + a g - 2 b g + c g)) + } + } + +Using the results above (when the line tends towards horizontal) + A = (-(d - 2*e + f) + g*(a - 2*b + c) ) + B = 2*( (d - e ) - g*(a - b ) ) + C = (-(d ) + g*(a ) + h ) + +If g goes to infinity, we can rewrite the line in terms of x. + x = g'*y + h' + +And solve accordingly in Mathematica: + + (in) t2 = Resultant[a*(1 - t)^2 + 2*b*(1 - t)*t + c*t^2 - g'*y - h', + d*(1 - t)^2 + 2*e*(1 - t)*t + f*t^2 - y, y] + (out) a - h' - 2 a t + 2 b t + a t^2 - 2 b t^2 + c t^2 - + g' (d - 2 d t + 2 e t + d t^2 - 2 e t^2 + f t^2) + (in) Solve[t2 == 0, t] + (out) { + {t -> (2 a - 2 b - 2 d g' + 2 e g' - + Sqrt[(-2 a + 2 b + 2 d g' - 2 e g')^2 - + 4 (a - 2 b + c - d g' + 2 e g' - f g') (a - d g' - h')]) / + (2 (a - 2 b + c - d g' + 2 e g' - f g')) + }, + {t -> (2 a - 2 b - 2 d g' + 2 e g' + + Sqrt[(-2 a + 2 b + 2 d g' - 2 e g')^2 - + 4 (a - 2 b + c - d g' + 2 e g' - f g') (a - d g' - h')])/ + (2 (a - 2 b + c - d g' + 2 e g' - f g')) + } + } + +Thus, if the slope of the line tends towards vertical, we use: + A = ( (a - 2*b + c) - g'*(d - 2*e + f) ) + B = 2*(-(a - b ) + g'*(d - e ) ) + C = ( (a ) - g'*(d ) - h' ) + */ + +class LineQuadraticIntersections { +public: + enum PinTPoint { + kPointUninitialized, + kPointInitialized + }; + + LineQuadraticIntersections(const SkDQuad& q, const SkDLine& l, SkIntersections* i) + : fQuad(q) + , fLine(&l) + , fIntersections(i) + , fAllowNear(true) { + i->setMax(5); // allow short partial coincidence plus discrete intersections + } + + LineQuadraticIntersections(const SkDQuad& q) + : fQuad(q) + SkDEBUGPARAMS(fLine(nullptr)) + SkDEBUGPARAMS(fIntersections(nullptr)) + SkDEBUGPARAMS(fAllowNear(false)) { + } + + void allowNear(bool allow) { + fAllowNear = allow; + } + + void checkCoincident() { + int last = fIntersections->used() - 1; + for (int index = 0; index < last; ) { + double quadMidT = ((*fIntersections)[0][index] + (*fIntersections)[0][index + 1]) / 2; + SkDPoint quadMidPt = fQuad.ptAtT(quadMidT); + double t = fLine->nearPoint(quadMidPt, nullptr); + if (t < 0) { + ++index; + continue; + } + if (fIntersections->isCoincident(index)) { + fIntersections->removeOne(index); + --last; + } else if (fIntersections->isCoincident(index + 1)) { + fIntersections->removeOne(index + 1); + --last; + } else { + fIntersections->setCoincident(index++); + } + fIntersections->setCoincident(index); + } + } + + int intersectRay(double roots[2]) { + /* + solve by rotating line+quad so line is horizontal, then finding the roots + set up matrix to rotate quad to x-axis + |cos(a) -sin(a)| + |sin(a) cos(a)| + note that cos(a) = A(djacent) / Hypoteneuse + sin(a) = O(pposite) / Hypoteneuse + since we are computing Ts, we can ignore hypoteneuse, the scale factor: + | A -O | + | O A | + A = line[1].fX - line[0].fX (adjacent side of the right triangle) + O = line[1].fY - line[0].fY (opposite side of the right triangle) + for each of the three points (e.g. n = 0 to 2) + quad[n].fY' = (quad[n].fY - line[0].fY) * A - (quad[n].fX - line[0].fX) * O + */ + double adj = (*fLine)[1].fX - (*fLine)[0].fX; + double opp = (*fLine)[1].fY - (*fLine)[0].fY; + double r[3]; + for (int n = 0; n < 3; ++n) { + r[n] = (fQuad[n].fY - (*fLine)[0].fY) * adj - (fQuad[n].fX - (*fLine)[0].fX) * opp; + } + double A = r[2]; + double B = r[1]; + double C = r[0]; + A += C - 2 * B; // A = a - 2*b + c + B -= C; // B = -(b - c) + return SkDQuad::RootsValidT(A, 2 * B, C, roots); + } + + int intersect() { + addExactEndPoints(); + if (fAllowNear) { + addNearEndPoints(); + } + double rootVals[2]; + int roots = intersectRay(rootVals); + for (int index = 0; index < roots; ++index) { + double quadT = rootVals[index]; + double lineT = findLineT(quadT); + SkDPoint pt; + if (pinTs(&quadT, &lineT, &pt, kPointUninitialized) && uniqueAnswer(quadT, pt)) { + fIntersections->insert(quadT, lineT, pt); + } + } + checkCoincident(); + return fIntersections->used(); + } + + int horizontalIntersect(double axisIntercept, double roots[2]) { + double D = fQuad[2].fY; // f + double E = fQuad[1].fY; // e + double F = fQuad[0].fY; // d + D += F - 2 * E; // D = d - 2*e + f + E -= F; // E = -(d - e) + F -= axisIntercept; + return SkDQuad::RootsValidT(D, 2 * E, F, roots); + } + + int horizontalIntersect(double axisIntercept, double left, double right, bool flipped) { + addExactHorizontalEndPoints(left, right, axisIntercept); + if (fAllowNear) { + addNearHorizontalEndPoints(left, right, axisIntercept); + } + double rootVals[2]; + int roots = horizontalIntersect(axisIntercept, rootVals); + for (int index = 0; index < roots; ++index) { + double quadT = rootVals[index]; + SkDPoint pt = fQuad.ptAtT(quadT); + double lineT = (pt.fX - left) / (right - left); + if (pinTs(&quadT, &lineT, &pt, kPointInitialized) && uniqueAnswer(quadT, pt)) { + fIntersections->insert(quadT, lineT, pt); + } + } + if (flipped) { + fIntersections->flip(); + } + checkCoincident(); + return fIntersections->used(); + } + + bool uniqueAnswer(double quadT, const SkDPoint& pt) { + for (int inner = 0; inner < fIntersections->used(); ++inner) { + if (fIntersections->pt(inner) != pt) { + continue; + } + double existingQuadT = (*fIntersections)[0][inner]; + if (quadT == existingQuadT) { + return false; + } + // check if midway on quad is also same point. If so, discard this + double quadMidT = (existingQuadT + quadT) / 2; + SkDPoint quadMidPt = fQuad.ptAtT(quadMidT); + if (quadMidPt.approximatelyEqual(pt)) { + return false; + } + } +#if ONE_OFF_DEBUG + SkDPoint qPt = fQuad.ptAtT(quadT); + SkDebugf("%s pt=(%1.9g,%1.9g) cPt=(%1.9g,%1.9g)\n", __FUNCTION__, pt.fX, pt.fY, + qPt.fX, qPt.fY); +#endif + return true; + } + + int verticalIntersect(double axisIntercept, double roots[2]) { + double D = fQuad[2].fX; // f + double E = fQuad[1].fX; // e + double F = fQuad[0].fX; // d + D += F - 2 * E; // D = d - 2*e + f + E -= F; // E = -(d - e) + F -= axisIntercept; + return SkDQuad::RootsValidT(D, 2 * E, F, roots); + } + + int verticalIntersect(double axisIntercept, double top, double bottom, bool flipped) { + addExactVerticalEndPoints(top, bottom, axisIntercept); + if (fAllowNear) { + addNearVerticalEndPoints(top, bottom, axisIntercept); + } + double rootVals[2]; + int roots = verticalIntersect(axisIntercept, rootVals); + for (int index = 0; index < roots; ++index) { + double quadT = rootVals[index]; + SkDPoint pt = fQuad.ptAtT(quadT); + double lineT = (pt.fY - top) / (bottom - top); + if (pinTs(&quadT, &lineT, &pt, kPointInitialized) && uniqueAnswer(quadT, pt)) { + fIntersections->insert(quadT, lineT, pt); + } + } + if (flipped) { + fIntersections->flip(); + } + checkCoincident(); + return fIntersections->used(); + } + +protected: + // add endpoints first to get zero and one t values exactly + void addExactEndPoints() { + for (int qIndex = 0; qIndex < 3; qIndex += 2) { + double lineT = fLine->exactPoint(fQuad[qIndex]); + if (lineT < 0) { + continue; + } + double quadT = (double) (qIndex >> 1); + fIntersections->insert(quadT, lineT, fQuad[qIndex]); + } + } + + void addNearEndPoints() { + for (int qIndex = 0; qIndex < 3; qIndex += 2) { + double quadT = (double) (qIndex >> 1); + if (fIntersections->hasT(quadT)) { + continue; + } + double lineT = fLine->nearPoint(fQuad[qIndex], nullptr); + if (lineT < 0) { + continue; + } + fIntersections->insert(quadT, lineT, fQuad[qIndex]); + } + this->addLineNearEndPoints(); + } + + void addLineNearEndPoints() { + for (int lIndex = 0; lIndex < 2; ++lIndex) { + double lineT = (double) lIndex; + if (fIntersections->hasOppT(lineT)) { + continue; + } + double quadT = ((SkDCurve*) &fQuad)->nearPoint(SkPath::kQuad_Verb, + (*fLine)[lIndex], (*fLine)[!lIndex]); + if (quadT < 0) { + continue; + } + fIntersections->insert(quadT, lineT, (*fLine)[lIndex]); + } + } + + void addExactHorizontalEndPoints(double left, double right, double y) { + for (int qIndex = 0; qIndex < 3; qIndex += 2) { + double lineT = SkDLine::ExactPointH(fQuad[qIndex], left, right, y); + if (lineT < 0) { + continue; + } + double quadT = (double) (qIndex >> 1); + fIntersections->insert(quadT, lineT, fQuad[qIndex]); + } + } + + void addNearHorizontalEndPoints(double left, double right, double y) { + for (int qIndex = 0; qIndex < 3; qIndex += 2) { + double quadT = (double) (qIndex >> 1); + if (fIntersections->hasT(quadT)) { + continue; + } + double lineT = SkDLine::NearPointH(fQuad[qIndex], left, right, y); + if (lineT < 0) { + continue; + } + fIntersections->insert(quadT, lineT, fQuad[qIndex]); + } + this->addLineNearEndPoints(); + } + + void addExactVerticalEndPoints(double top, double bottom, double x) { + for (int qIndex = 0; qIndex < 3; qIndex += 2) { + double lineT = SkDLine::ExactPointV(fQuad[qIndex], top, bottom, x); + if (lineT < 0) { + continue; + } + double quadT = (double) (qIndex >> 1); + fIntersections->insert(quadT, lineT, fQuad[qIndex]); + } + } + + void addNearVerticalEndPoints(double top, double bottom, double x) { + for (int qIndex = 0; qIndex < 3; qIndex += 2) { + double quadT = (double) (qIndex >> 1); + if (fIntersections->hasT(quadT)) { + continue; + } + double lineT = SkDLine::NearPointV(fQuad[qIndex], top, bottom, x); + if (lineT < 0) { + continue; + } + fIntersections->insert(quadT, lineT, fQuad[qIndex]); + } + this->addLineNearEndPoints(); + } + + double findLineT(double t) { + SkDPoint xy = fQuad.ptAtT(t); + double dx = (*fLine)[1].fX - (*fLine)[0].fX; + double dy = (*fLine)[1].fY - (*fLine)[0].fY; + if (fabs(dx) > fabs(dy)) { + return (xy.fX - (*fLine)[0].fX) / dx; + } + return (xy.fY - (*fLine)[0].fY) / dy; + } + + bool pinTs(double* quadT, double* lineT, SkDPoint* pt, PinTPoint ptSet) { + if (!approximately_one_or_less_double(*lineT)) { + return false; + } + if (!approximately_zero_or_more_double(*lineT)) { + return false; + } + double qT = *quadT = SkPinT(*quadT); + double lT = *lineT = SkPinT(*lineT); + if (lT == 0 || lT == 1 || (ptSet == kPointUninitialized && qT != 0 && qT != 1)) { + *pt = (*fLine).ptAtT(lT); + } else if (ptSet == kPointUninitialized) { + *pt = fQuad.ptAtT(qT); + } + SkPoint gridPt = pt->asSkPoint(); + if (SkDPoint::ApproximatelyEqual(gridPt, (*fLine)[0].asSkPoint())) { + *pt = (*fLine)[0]; + *lineT = 0; + } else if (SkDPoint::ApproximatelyEqual(gridPt, (*fLine)[1].asSkPoint())) { + *pt = (*fLine)[1]; + *lineT = 1; + } + if (fIntersections->used() > 0 && approximately_equal((*fIntersections)[1][0], *lineT)) { + return false; + } + if (gridPt == fQuad[0].asSkPoint()) { + *pt = fQuad[0]; + *quadT = 0; + } else if (gridPt == fQuad[2].asSkPoint()) { + *pt = fQuad[2]; + *quadT = 1; + } + return true; + } + +private: + const SkDQuad& fQuad; + const SkDLine* fLine; + SkIntersections* fIntersections; + bool fAllowNear; +}; + +int SkIntersections::horizontal(const SkDQuad& quad, double left, double right, double y, + bool flipped) { + SkDLine line = {{{ left, y }, { right, y }}}; + LineQuadraticIntersections q(quad, line, this); + return q.horizontalIntersect(y, left, right, flipped); +} + +int SkIntersections::vertical(const SkDQuad& quad, double top, double bottom, double x, + bool flipped) { + SkDLine line = {{{ x, top }, { x, bottom }}}; + LineQuadraticIntersections q(quad, line, this); + return q.verticalIntersect(x, top, bottom, flipped); +} + +int SkIntersections::intersect(const SkDQuad& quad, const SkDLine& line) { + LineQuadraticIntersections q(quad, line, this); + q.allowNear(fAllowNear); + return q.intersect(); +} + +int SkIntersections::intersectRay(const SkDQuad& quad, const SkDLine& line) { + LineQuadraticIntersections q(quad, line, this); + fUsed = q.intersectRay(fT[0]); + for (int index = 0; index < fUsed; ++index) { + fPt[index] = quad.ptAtT(fT[0][index]); + } + return fUsed; +} + +int SkIntersections::HorizontalIntercept(const SkDQuad& quad, SkScalar y, double* roots) { + LineQuadraticIntersections q(quad); + return q.horizontalIntersect(y, roots); +} + +int SkIntersections::VerticalIntercept(const SkDQuad& quad, SkScalar x, double* roots) { + LineQuadraticIntersections q(quad); + return q.verticalIntersect(x, roots); +} + +// SkDQuad accessors to Intersection utilities + +int SkDQuad::horizontalIntersect(double yIntercept, double roots[2]) const { + return SkIntersections::HorizontalIntercept(*this, yIntercept, roots); +} + +int SkDQuad::verticalIntersect(double xIntercept, double roots[2]) const { + return SkIntersections::VerticalIntercept(*this, xIntercept, roots); +} diff --git a/gfx/skia/skia/src/pathops/SkIntersectionHelper.h b/gfx/skia/skia/src/pathops/SkIntersectionHelper.h new file mode 100644 index 0000000000..9eb7cbf807 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkIntersectionHelper.h @@ -0,0 +1,113 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkIntersectionHelper_DEFINED +#define SkIntersectionHelper_DEFINED + +#include "include/core/SkPath.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpSegment.h" + +#ifdef SK_DEBUG +#include "src/pathops/SkPathOpsPoint.h" +#endif + +class SkIntersectionHelper { +public: + enum SegmentType { + kHorizontalLine_Segment = -1, + kVerticalLine_Segment = 0, + kLine_Segment = SkPath::kLine_Verb, + kQuad_Segment = SkPath::kQuad_Verb, + kConic_Segment = SkPath::kConic_Verb, + kCubic_Segment = SkPath::kCubic_Verb, + }; + + bool advance() { + fSegment = fSegment->next(); + return fSegment != nullptr; + } + + SkScalar bottom() const { + return bounds().fBottom; + } + + const SkPathOpsBounds& bounds() const { + return fSegment->bounds(); + } + + SkOpContour* contour() const { + return fSegment->contour(); + } + + void init(SkOpContour* contour) { + fSegment = contour->first(); + } + + SkScalar left() const { + return bounds().fLeft; + } + + const SkPoint* pts() const { + return fSegment->pts(); + } + + SkScalar right() const { + return bounds().fRight; + } + + SkOpSegment* segment() const { + return fSegment; + } + + SegmentType segmentType() const { + SegmentType type = (SegmentType) fSegment->verb(); + if (type != kLine_Segment) { + return type; + } + if (fSegment->isHorizontal()) { + return kHorizontalLine_Segment; + } + if (fSegment->isVertical()) { + return kVerticalLine_Segment; + } + return kLine_Segment; + } + + bool startAfter(const SkIntersectionHelper& after) { + fSegment = after.fSegment->next(); + return fSegment != nullptr; + } + + SkScalar top() const { + return bounds().fTop; + } + + SkScalar weight() const { + return fSegment->weight(); + } + + SkScalar x() const { + return bounds().fLeft; + } + + bool xFlipped() const { + return x() != pts()[0].fX; + } + + SkScalar y() const { + return bounds().fTop; + } + + bool yFlipped() const { + return y() != pts()[0].fY; + } + +private: + SkOpSegment* fSegment; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkIntersections.cpp b/gfx/skia/skia/src/pathops/SkIntersections.cpp new file mode 100644 index 0000000000..4e49ee21e8 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkIntersections.cpp @@ -0,0 +1,175 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pathops/SkIntersections.h" + +#include + +int SkIntersections::closestTo(double rangeStart, double rangeEnd, const SkDPoint& testPt, + double* closestDist) const { + int closest = -1; + *closestDist = SK_ScalarMax; + for (int index = 0; index < fUsed; ++index) { + if (!between(rangeStart, fT[0][index], rangeEnd)) { + continue; + } + const SkDPoint& iPt = fPt[index]; + double dist = testPt.distanceSquared(iPt); + if (*closestDist > dist) { + *closestDist = dist; + closest = index; + } + } + return closest; +} + +void SkIntersections::flip() { + for (int index = 0; index < fUsed; ++index) { + fT[1][index] = 1 - fT[1][index]; + } +} + +int SkIntersections::insert(double one, double two, const SkDPoint& pt) { + if (fIsCoincident[0] == 3 && between(fT[0][0], one, fT[0][1])) { + // For now, don't allow a mix of coincident and non-coincident intersections + return -1; + } + SkASSERT(fUsed <= 1 || fT[0][0] <= fT[0][1]); + int index; + for (index = 0; index < fUsed; ++index) { + double oldOne = fT[0][index]; + double oldTwo = fT[1][index]; + if (one == oldOne && two == oldTwo) { + return -1; + } + if (more_roughly_equal(oldOne, one) && more_roughly_equal(oldTwo, two)) { + if ((!precisely_zero(one) || precisely_zero(oldOne)) + && (!precisely_equal(one, 1) || precisely_equal(oldOne, 1)) + && (!precisely_zero(two) || precisely_zero(oldTwo)) + && (!precisely_equal(two, 1) || precisely_equal(oldTwo, 1))) { + return -1; + } + SkASSERT(one >= 0 && one <= 1); + SkASSERT(two >= 0 && two <= 1); + // remove this and reinsert below in case replacing would make list unsorted + int remaining = fUsed - index - 1; + memmove(&fPt[index], &fPt[index + 1], sizeof(fPt[0]) * remaining); + memmove(&fT[0][index], &fT[0][index + 1], sizeof(fT[0][0]) * remaining); + memmove(&fT[1][index], &fT[1][index + 1], sizeof(fT[1][0]) * remaining); + int clearMask = ~((1 << index) - 1); + fIsCoincident[0] -= (fIsCoincident[0] >> 1) & clearMask; + fIsCoincident[1] -= (fIsCoincident[1] >> 1) & clearMask; + --fUsed; + break; + } + #if ONE_OFF_DEBUG + if (pt.roughlyEqual(fPt[index])) { + SkDebugf("%s t=%1.9g pts roughly equal\n", __FUNCTION__, one); + } + #endif + } + for (index = 0; index < fUsed; ++index) { + if (fT[0][index] > one) { + break; + } + } + if (fUsed >= fMax) { + SkOPASSERT(0); // FIXME : this error, if it is to be handled at runtime in release, must + // be propagated all the way back down to the caller, and return failure. + fUsed = 0; + return 0; + } + int remaining = fUsed - index; + if (remaining > 0) { + memmove(&fPt[index + 1], &fPt[index], sizeof(fPt[0]) * remaining); + memmove(&fT[0][index + 1], &fT[0][index], sizeof(fT[0][0]) * remaining); + memmove(&fT[1][index + 1], &fT[1][index], sizeof(fT[1][0]) * remaining); + int clearMask = ~((1 << index) - 1); + fIsCoincident[0] += fIsCoincident[0] & clearMask; + fIsCoincident[1] += fIsCoincident[1] & clearMask; + } + fPt[index] = pt; + if (one < 0 || one > 1) { + return -1; + } + if (two < 0 || two > 1) { + return -1; + } + fT[0][index] = one; + fT[1][index] = two; + ++fUsed; + SkASSERT(fUsed <= std::size(fPt)); + return index; +} + +void SkIntersections::insertNear(double one, double two, const SkDPoint& pt1, const SkDPoint& pt2) { + SkASSERT(one == 0 || one == 1); + SkASSERT(two == 0 || two == 1); + SkASSERT(pt1 != pt2); + fNearlySame[one ? 1 : 0] = true; + (void) insert(one, two, pt1); + fPt2[one ? 1 : 0] = pt2; +} + +int SkIntersections::insertCoincident(double one, double two, const SkDPoint& pt) { + int index = insertSwap(one, two, pt); + if (index >= 0) { + setCoincident(index); + } + return index; +} + +void SkIntersections::setCoincident(int index) { + SkASSERT(index >= 0); + int bit = 1 << index; + fIsCoincident[0] |= bit; + fIsCoincident[1] |= bit; +} + +void SkIntersections::merge(const SkIntersections& a, int aIndex, const SkIntersections& b, + int bIndex) { + this->reset(); + fT[0][0] = a.fT[0][aIndex]; + fT[1][0] = b.fT[0][bIndex]; + fPt[0] = a.fPt[aIndex]; + fPt2[0] = b.fPt[bIndex]; + fUsed = 1; +} + +int SkIntersections::mostOutside(double rangeStart, double rangeEnd, const SkDPoint& origin) const { + int result = -1; + for (int index = 0; index < fUsed; ++index) { + if (!between(rangeStart, fT[0][index], rangeEnd)) { + continue; + } + if (result < 0) { + result = index; + continue; + } + SkDVector best = fPt[result] - origin; + SkDVector test = fPt[index] - origin; + if (test.crossCheck(best) < 0) { + result = index; + } + } + return result; +} + +void SkIntersections::removeOne(int index) { + int remaining = --fUsed - index; + if (remaining <= 0) { + return; + } + memmove(&fPt[index], &fPt[index + 1], sizeof(fPt[0]) * remaining); + memmove(&fT[0][index], &fT[0][index + 1], sizeof(fT[0][0]) * remaining); + memmove(&fT[1][index], &fT[1][index + 1], sizeof(fT[1][0]) * remaining); +// SkASSERT(fIsCoincident[0] == 0); + int coBit = fIsCoincident[0] & (1 << index); + fIsCoincident[0] -= ((fIsCoincident[0] >> 1) & ~((1 << index) - 1)) + coBit; + SkASSERT(!(coBit ^ (fIsCoincident[1] & (1 << index)))); + fIsCoincident[1] -= ((fIsCoincident[1] >> 1) & ~((1 << index) - 1)) + coBit; +} diff --git a/gfx/skia/skia/src/pathops/SkIntersections.h b/gfx/skia/skia/src/pathops/SkIntersections.h new file mode 100644 index 0000000000..ff4c63debd --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkIntersections.h @@ -0,0 +1,346 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkIntersections_DEFINE +#define SkIntersections_DEFINE + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTCurve.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +struct SkDRect; + +class SkIntersections { +public: + SkIntersections(SkDEBUGCODE(SkOpGlobalState* globalState = nullptr)) + : fSwap(0) +#ifdef SK_DEBUG + SkDEBUGPARAMS(fDebugGlobalState(globalState)) + , fDepth(0) +#endif + { + sk_bzero(fPt, sizeof(fPt)); + sk_bzero(fPt2, sizeof(fPt2)); + sk_bzero(fT, sizeof(fT)); + sk_bzero(fNearlySame, sizeof(fNearlySame)); +#if DEBUG_T_SECT_LOOP_COUNT + sk_bzero(fDebugLoopCount, sizeof(fDebugLoopCount)); +#endif + reset(); + fMax = 0; // require that the caller set the max + } + + class TArray { + public: + explicit TArray(const double ts[10]) : fTArray(ts) {} + double operator[](int n) const { + return fTArray[n]; + } + const double* fTArray; + }; + TArray operator[](int n) const { return TArray(fT[n]); } + + void allowNear(bool nearAllowed) { + fAllowNear = nearAllowed; + } + + void clearCoincidence(int index) { + SkASSERT(index >= 0); + int bit = 1 << index; + fIsCoincident[0] &= ~bit; + fIsCoincident[1] &= ~bit; + } + + int conicHorizontal(const SkPoint a[3], SkScalar weight, SkScalar left, SkScalar right, + SkScalar y, bool flipped) { + SkDConic conic; + conic.set(a, weight); + fMax = 2; + return horizontal(conic, left, right, y, flipped); + } + + int conicVertical(const SkPoint a[3], SkScalar weight, SkScalar top, SkScalar bottom, + SkScalar x, bool flipped) { + SkDConic conic; + conic.set(a, weight); + fMax = 2; + return vertical(conic, top, bottom, x, flipped); + } + + int conicLine(const SkPoint a[3], SkScalar weight, const SkPoint b[2]) { + SkDConic conic; + conic.set(a, weight); + SkDLine line; + line.set(b); + fMax = 3; // 2; permit small coincident segment + non-coincident intersection + return intersect(conic, line); + } + + int cubicHorizontal(const SkPoint a[4], SkScalar left, SkScalar right, SkScalar y, + bool flipped) { + SkDCubic cubic; + cubic.set(a); + fMax = 3; + return horizontal(cubic, left, right, y, flipped); + } + + int cubicVertical(const SkPoint a[4], SkScalar top, SkScalar bottom, SkScalar x, bool flipped) { + SkDCubic cubic; + cubic.set(a); + fMax = 3; + return vertical(cubic, top, bottom, x, flipped); + } + + int cubicLine(const SkPoint a[4], const SkPoint b[2]) { + SkDCubic cubic; + cubic.set(a); + SkDLine line; + line.set(b); + fMax = 3; + return intersect(cubic, line); + } + +#ifdef SK_DEBUG + SkOpGlobalState* globalState() const { return fDebugGlobalState; } +#endif + + bool hasT(double t) const { + SkASSERT(t == 0 || t == 1); + return fUsed > 0 && (t == 0 ? fT[0][0] == 0 : fT[0][fUsed - 1] == 1); + } + + bool hasOppT(double t) const { + SkASSERT(t == 0 || t == 1); + return fUsed > 0 && (fT[1][0] == t || fT[1][fUsed - 1] == t); + } + + int insertSwap(double one, double two, const SkDPoint& pt) { + if (fSwap) { + return insert(two, one, pt); + } else { + return insert(one, two, pt); + } + } + + bool isCoincident(int index) { + return (fIsCoincident[0] & 1 << index) != 0; + } + + int lineHorizontal(const SkPoint a[2], SkScalar left, SkScalar right, SkScalar y, + bool flipped) { + SkDLine line; + line.set(a); + fMax = 2; + return horizontal(line, left, right, y, flipped); + } + + int lineVertical(const SkPoint a[2], SkScalar top, SkScalar bottom, SkScalar x, bool flipped) { + SkDLine line; + line.set(a); + fMax = 2; + return vertical(line, top, bottom, x, flipped); + } + + int lineLine(const SkPoint a[2], const SkPoint b[2]) { + SkDLine aLine, bLine; + aLine.set(a); + bLine.set(b); + fMax = 2; + return intersect(aLine, bLine); + } + + bool nearlySame(int index) const { + SkASSERT(index == 0 || index == 1); + return fNearlySame[index]; + } + + const SkDPoint& pt(int index) const { + return fPt[index]; + } + + const SkDPoint& pt2(int index) const { + return fPt2[index]; + } + + int quadHorizontal(const SkPoint a[3], SkScalar left, SkScalar right, SkScalar y, + bool flipped) { + SkDQuad quad; + quad.set(a); + fMax = 2; + return horizontal(quad, left, right, y, flipped); + } + + int quadVertical(const SkPoint a[3], SkScalar top, SkScalar bottom, SkScalar x, bool flipped) { + SkDQuad quad; + quad.set(a); + fMax = 2; + return vertical(quad, top, bottom, x, flipped); + } + + int quadLine(const SkPoint a[3], const SkPoint b[2]) { + SkDQuad quad; + quad.set(a); + SkDLine line; + line.set(b); + return intersect(quad, line); + } + + // leaves swap, max alone + void reset() { + fAllowNear = true; + fUsed = 0; + sk_bzero(fIsCoincident, sizeof(fIsCoincident)); + } + + void set(bool swap, int tIndex, double t) { + fT[(int) swap][tIndex] = t; + } + + void setMax(int max) { + SkASSERT(max <= (int) std::size(fPt)); + fMax = max; + } + + void swap() { + fSwap ^= true; + } + + bool swapped() const { + return fSwap; + } + + int used() const { + return fUsed; + } + + void downDepth() { + SkASSERT(--fDepth >= 0); + } + + bool unBumpT(int index) { + SkASSERT(fUsed == 1); + fT[0][index] = fT[0][index] * (1 + BUMP_EPSILON * 2) - BUMP_EPSILON; + if (!between(0, fT[0][index], 1)) { + fUsed = 0; + return false; + } + return true; + } + + void upDepth() { + SkASSERT(++fDepth < 16); + } + + void alignQuadPts(const SkPoint a[3], const SkPoint b[3]); + int cleanUpCoincidence(); + int closestTo(double rangeStart, double rangeEnd, const SkDPoint& testPt, double* dist) const; + void cubicInsert(double one, double two, const SkDPoint& pt, const SkDCubic& c1, + const SkDCubic& c2); + void flip(); + int horizontal(const SkDLine&, double left, double right, double y, bool flipped); + int horizontal(const SkDQuad&, double left, double right, double y, bool flipped); + int horizontal(const SkDQuad&, double left, double right, double y, double tRange[2]); + int horizontal(const SkDCubic&, double y, double tRange[3]); + int horizontal(const SkDConic&, double left, double right, double y, bool flipped); + int horizontal(const SkDCubic&, double left, double right, double y, bool flipped); + int horizontal(const SkDCubic&, double left, double right, double y, double tRange[3]); + static double HorizontalIntercept(const SkDLine& line, double y); + static int HorizontalIntercept(const SkDQuad& quad, SkScalar y, double* roots); + static int HorizontalIntercept(const SkDConic& conic, SkScalar y, double* roots); + // FIXME : does not respect swap + int insert(double one, double two, const SkDPoint& pt); + void insertNear(double one, double two, const SkDPoint& pt1, const SkDPoint& pt2); + // start if index == 0 : end if index == 1 + int insertCoincident(double one, double two, const SkDPoint& pt); + int intersect(const SkDLine&, const SkDLine&); + int intersect(const SkDQuad&, const SkDLine&); + int intersect(const SkDQuad&, const SkDQuad&); + int intersect(const SkDConic&, const SkDLine&); + int intersect(const SkDConic&, const SkDQuad&); + int intersect(const SkDConic&, const SkDConic&); + int intersect(const SkDCubic&, const SkDLine&); + int intersect(const SkDCubic&, const SkDQuad&); + int intersect(const SkDCubic&, const SkDConic&); + int intersect(const SkDCubic&, const SkDCubic&); + int intersectRay(const SkDLine&, const SkDLine&); + int intersectRay(const SkDQuad&, const SkDLine&); + int intersectRay(const SkDConic&, const SkDLine&); + int intersectRay(const SkDCubic&, const SkDLine&); + int intersectRay(const SkTCurve& tCurve, const SkDLine& line) { + return tCurve.intersectRay(this, line); + } + + void merge(const SkIntersections& , int , const SkIntersections& , int ); + int mostOutside(double rangeStart, double rangeEnd, const SkDPoint& origin) const; + void removeOne(int index); + void setCoincident(int index); + int vertical(const SkDLine&, double top, double bottom, double x, bool flipped); + int vertical(const SkDQuad&, double top, double bottom, double x, bool flipped); + int vertical(const SkDConic&, double top, double bottom, double x, bool flipped); + int vertical(const SkDCubic&, double top, double bottom, double x, bool flipped); + static double VerticalIntercept(const SkDLine& line, double x); + static int VerticalIntercept(const SkDQuad& quad, SkScalar x, double* roots); + static int VerticalIntercept(const SkDConic& conic, SkScalar x, double* roots); + + int depth() const { +#ifdef SK_DEBUG + return fDepth; +#else + return 0; +#endif + } + + enum DebugLoop { + kIterations_DebugLoop, + kCoinCheck_DebugLoop, + kComputePerp_DebugLoop, + }; + + void debugBumpLoopCount(DebugLoop ); + int debugCoincidentUsed() const; + int debugLoopCount(DebugLoop ) const; + void debugResetLoopCount(); + void dump() const; // implemented for testing only + +private: + bool cubicCheckCoincidence(const SkDCubic& c1, const SkDCubic& c2); + bool cubicExactEnd(const SkDCubic& cubic1, bool start, const SkDCubic& cubic2); + void cubicNearEnd(const SkDCubic& cubic1, bool start, const SkDCubic& cubic2, const SkDRect& ); + void cleanUpParallelLines(bool parallel); + void computePoints(const SkDLine& line, int used); + + SkDPoint fPt[13]; // FIXME: since scans store points as SkPoint, this should also + SkDPoint fPt2[2]; // used by nearly same to store alternate intersection point + double fT[2][13]; + uint16_t fIsCoincident[2]; // bit set for each curve's coincident T + bool fNearlySame[2]; // true if end points nearly match + unsigned char fUsed; + unsigned char fMax; + bool fAllowNear; + bool fSwap; +#ifdef SK_DEBUG + SkOpGlobalState* fDebugGlobalState; + int fDepth; +#endif +#if DEBUG_T_SECT_LOOP_COUNT + int fDebugLoopCount[3]; +#endif +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkLineParameters.h b/gfx/skia/skia/src/pathops/SkLineParameters.h new file mode 100644 index 0000000000..45d1ed4ed6 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkLineParameters.h @@ -0,0 +1,181 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLineParameters_DEFINED +#define SkLineParameters_DEFINED + +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsQuad.h" + +// Sources +// computer-aided design - volume 22 number 9 november 1990 pp 538 - 549 +// online at http://cagd.cs.byu.edu/~tom/papers/bezclip.pdf + +// This turns a line segment into a parameterized line, of the form +// ax + by + c = 0 +// When a^2 + b^2 == 1, the line is normalized. +// The distance to the line for (x, y) is d(x,y) = ax + by + c +// +// Note that the distances below are not necessarily normalized. To get the true +// distance, it's necessary to either call normalize() after xxxEndPoints(), or +// divide the result of xxxDistance() by sqrt(normalSquared()) + +class SkLineParameters { +public: + + bool cubicEndPoints(const SkDCubic& pts) { + int endIndex = 1; + cubicEndPoints(pts, 0, endIndex); + if (dy() != 0) { + return true; + } + if (dx() == 0) { + cubicEndPoints(pts, 0, ++endIndex); + SkASSERT(endIndex == 2); + if (dy() != 0) { + return true; + } + if (dx() == 0) { + cubicEndPoints(pts, 0, ++endIndex); // line + SkASSERT(endIndex == 3); + return false; + } + } + // FIXME: after switching to round sort, remove bumping fA + if (dx() < 0) { // only worry about y bias when breaking cw/ccw tie + return true; + } + // if cubic tangent is on x axis, look at next control point to break tie + // control point may be approximate, so it must move significantly to account for error + if (NotAlmostEqualUlps(pts[0].fY, pts[++endIndex].fY)) { + if (pts[0].fY > pts[endIndex].fY) { + fA = DBL_EPSILON; // push it from 0 to slightly negative (y() returns -a) + } + return true; + } + if (endIndex == 3) { + return true; + } + SkASSERT(endIndex == 2); + if (pts[0].fY > pts[3].fY) { + fA = DBL_EPSILON; // push it from 0 to slightly negative (y() returns -a) + } + return true; + } + + void cubicEndPoints(const SkDCubic& pts, int s, int e) { + fA = pts[s].fY - pts[e].fY; + fB = pts[e].fX - pts[s].fX; + fC = pts[s].fX * pts[e].fY - pts[e].fX * pts[s].fY; + } + + double cubicPart(const SkDCubic& part) { + cubicEndPoints(part); + if (part[0] == part[1] || ((const SkDLine& ) part[0]).nearRay(part[2])) { + return pointDistance(part[3]); + } + return pointDistance(part[2]); + } + + void lineEndPoints(const SkDLine& pts) { + fA = pts[0].fY - pts[1].fY; + fB = pts[1].fX - pts[0].fX; + fC = pts[0].fX * pts[1].fY - pts[1].fX * pts[0].fY; + } + + bool quadEndPoints(const SkDQuad& pts) { + quadEndPoints(pts, 0, 1); + if (dy() != 0) { + return true; + } + if (dx() == 0) { + quadEndPoints(pts, 0, 2); + return false; + } + if (dx() < 0) { // only worry about y bias when breaking cw/ccw tie + return true; + } + // FIXME: after switching to round sort, remove this + if (pts[0].fY > pts[2].fY) { + fA = DBL_EPSILON; + } + return true; + } + + void quadEndPoints(const SkDQuad& pts, int s, int e) { + fA = pts[s].fY - pts[e].fY; + fB = pts[e].fX - pts[s].fX; + fC = pts[s].fX * pts[e].fY - pts[e].fX * pts[s].fY; + } + + double quadPart(const SkDQuad& part) { + quadEndPoints(part); + return pointDistance(part[2]); + } + + double normalSquared() const { + return fA * fA + fB * fB; + } + + bool normalize() { + double normal = sqrt(normalSquared()); + if (approximately_zero(normal)) { + fA = fB = fC = 0; + return false; + } + double reciprocal = 1 / normal; + fA *= reciprocal; + fB *= reciprocal; + fC *= reciprocal; + return true; + } + + void cubicDistanceY(const SkDCubic& pts, SkDCubic& distance) const { + double oneThird = 1 / 3.0; + for (int index = 0; index < 4; ++index) { + distance[index].fX = index * oneThird; + distance[index].fY = fA * pts[index].fX + fB * pts[index].fY + fC; + } + } + + void quadDistanceY(const SkDQuad& pts, SkDQuad& distance) const { + double oneHalf = 1 / 2.0; + for (int index = 0; index < 3; ++index) { + distance[index].fX = index * oneHalf; + distance[index].fY = fA * pts[index].fX + fB * pts[index].fY + fC; + } + } + + double controlPtDistance(const SkDCubic& pts, int index) const { + SkASSERT(index == 1 || index == 2); + return fA * pts[index].fX + fB * pts[index].fY + fC; + } + + double controlPtDistance(const SkDQuad& pts) const { + return fA * pts[1].fX + fB * pts[1].fY + fC; + } + + double pointDistance(const SkDPoint& pt) const { + return fA * pt.fX + fB * pt.fY + fC; + } + + double dx() const { + return fB; + } + + double dy() const { + return -fA; + } + +private: + double fA; + double fB; + double fC; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkOpAngle.cpp b/gfx/skia/skia/src/pathops/SkOpAngle.cpp new file mode 100644 index 0000000000..d36b3ec7fc --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpAngle.cpp @@ -0,0 +1,1156 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkOpAngle.h" + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkTSort.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" + +#include +#include + +/* Angles are sorted counterclockwise. The smallest angle has a positive x and the smallest + positive y. The largest angle has a positive x and a zero y. */ + +#if DEBUG_ANGLE + static bool CompareResult(const char* func, SkString* bugOut, SkString* bugPart, int append, + bool compare) { + SkDebugf("%s %c %d\n", bugOut->c_str(), compare ? 'T' : 'F', append); + SkDebugf("%sPart %s\n", func, bugPart[0].c_str()); + SkDebugf("%sPart %s\n", func, bugPart[1].c_str()); + SkDebugf("%sPart %s\n", func, bugPart[2].c_str()); + return compare; + } + + #define COMPARE_RESULT(append, compare) CompareResult(__FUNCTION__, &bugOut, bugPart, append, \ + compare) +#else + #define COMPARE_RESULT(append, compare) compare +#endif + +/* quarter angle values for sector + +31 x > 0, y == 0 horizontal line (to the right) +0 x > 0, y == epsilon quad/cubic horizontal tangent eventually going +y +1 x > 0, y > 0, x > y nearer horizontal angle +2 x + e == y quad/cubic 45 going horiz +3 x > 0, y > 0, x == y 45 angle +4 x == y + e quad/cubic 45 going vert +5 x > 0, y > 0, x < y nearer vertical angle +6 x == epsilon, y > 0 quad/cubic vertical tangent eventually going +x +7 x == 0, y > 0 vertical line (to the top) + + 8 7 6 + 9 | 5 + 10 | 4 + 11 | 3 + 12 \ | / 2 + 13 | 1 + 14 | 0 + 15 --------------+------------- 31 + 16 | 30 + 17 | 29 + 18 / | \ 28 + 19 | 27 + 20 | 26 + 21 | 25 + 22 23 24 +*/ + +// return true if lh < this < rh +bool SkOpAngle::after(SkOpAngle* test) { + SkOpAngle* lh = test; + SkOpAngle* rh = lh->fNext; + SkASSERT(lh != rh); + fPart.fCurve = fOriginalCurvePart; + // Adjust lh and rh to share the same origin (floating point error in intersections can mean + // they aren't exactly the same). + lh->fPart.fCurve = lh->fOriginalCurvePart; + lh->fPart.fCurve[0] = fPart.fCurve[0]; + rh->fPart.fCurve = rh->fOriginalCurvePart; + rh->fPart.fCurve[0] = fPart.fCurve[0]; + +#if DEBUG_ANGLE + SkString bugOut; + bugOut.printf("%s [%d/%d] %d/%d tStart=%1.9g tEnd=%1.9g" + " < [%d/%d] %d/%d tStart=%1.9g tEnd=%1.9g" + " < [%d/%d] %d/%d tStart=%1.9g tEnd=%1.9g ", __FUNCTION__, + lh->segment()->debugID(), lh->debugID(), lh->fSectorStart, lh->fSectorEnd, + lh->fStart->t(), lh->fEnd->t(), + segment()->debugID(), debugID(), fSectorStart, fSectorEnd, fStart->t(), fEnd->t(), + rh->segment()->debugID(), rh->debugID(), rh->fSectorStart, rh->fSectorEnd, + rh->fStart->t(), rh->fEnd->t()); + SkString bugPart[3] = { lh->debugPart(), this->debugPart(), rh->debugPart() }; +#endif + if (lh->fComputeSector && !lh->computeSector()) { + return COMPARE_RESULT(1, true); + } + if (fComputeSector && !this->computeSector()) { + return COMPARE_RESULT(2, true); + } + if (rh->fComputeSector && !rh->computeSector()) { + return COMPARE_RESULT(3, true); + } +#if DEBUG_ANGLE // reset bugOut with computed sectors + bugOut.printf("%s [%d/%d] %d/%d tStart=%1.9g tEnd=%1.9g" + " < [%d/%d] %d/%d tStart=%1.9g tEnd=%1.9g" + " < [%d/%d] %d/%d tStart=%1.9g tEnd=%1.9g ", __FUNCTION__, + lh->segment()->debugID(), lh->debugID(), lh->fSectorStart, lh->fSectorEnd, + lh->fStart->t(), lh->fEnd->t(), + segment()->debugID(), debugID(), fSectorStart, fSectorEnd, fStart->t(), fEnd->t(), + rh->segment()->debugID(), rh->debugID(), rh->fSectorStart, rh->fSectorEnd, + rh->fStart->t(), rh->fEnd->t()); +#endif + bool ltrOverlap = (lh->fSectorMask | rh->fSectorMask) & fSectorMask; + bool lrOverlap = lh->fSectorMask & rh->fSectorMask; + int lrOrder; // set to -1 if either order works + if (!lrOverlap) { // no lh/rh sector overlap + if (!ltrOverlap) { // no lh/this/rh sector overlap + return COMPARE_RESULT(4, (lh->fSectorEnd > rh->fSectorStart) + ^ (fSectorStart > lh->fSectorEnd) ^ (fSectorStart > rh->fSectorStart)); + } + int lrGap = (rh->fSectorStart - lh->fSectorStart + 32) & 0x1f; + /* A tiny change can move the start +/- 4. The order can only be determined if + lr gap is not 12 to 20 or -12 to -20. + -31 ..-21 1 + -20 ..-12 -1 + -11 .. -1 0 + 0 shouldn't get here + 11 .. 1 1 + 12 .. 20 -1 + 21 .. 31 0 + */ + lrOrder = lrGap > 20 ? 0 : lrGap > 11 ? -1 : 1; + } else { + lrOrder = lh->orderable(rh); + if (!ltrOverlap && lrOrder >= 0) { + return COMPARE_RESULT(5, !lrOrder); + } + } + int ltOrder; + SkASSERT((lh->fSectorMask & fSectorMask) || (rh->fSectorMask & fSectorMask) || -1 == lrOrder); + if (lh->fSectorMask & fSectorMask) { + ltOrder = lh->orderable(this); + } else { + int ltGap = (fSectorStart - lh->fSectorStart + 32) & 0x1f; + ltOrder = ltGap > 20 ? 0 : ltGap > 11 ? -1 : 1; + } + int trOrder; + if (rh->fSectorMask & fSectorMask) { + trOrder = this->orderable(rh); + } else { + int trGap = (rh->fSectorStart - fSectorStart + 32) & 0x1f; + trOrder = trGap > 20 ? 0 : trGap > 11 ? -1 : 1; + } + this->alignmentSameSide(lh, <Order); + this->alignmentSameSide(rh, &trOrder); + if (lrOrder >= 0 && ltOrder >= 0 && trOrder >= 0) { + return COMPARE_RESULT(7, lrOrder ? (ltOrder & trOrder) : (ltOrder | trOrder)); + } +// SkASSERT(lrOrder >= 0 || ltOrder >= 0 || trOrder >= 0); +// There's not enough information to sort. Get the pairs of angles in opposite planes. +// If an order is < 0, the pair is already in an opposite plane. Check the remaining pairs. + // FIXME : once all variants are understood, rewrite this more simply + if (ltOrder == 0 && lrOrder == 0) { + SkASSERT(trOrder < 0); + // FIXME : once this is verified to work, remove one opposite angle call + SkDEBUGCODE(bool lrOpposite = lh->oppositePlanes(rh)); + bool ltOpposite = lh->oppositePlanes(this); + SkOPASSERT(lrOpposite != ltOpposite); + return COMPARE_RESULT(8, ltOpposite); + } else if (ltOrder == 1 && trOrder == 0) { + SkASSERT(lrOrder < 0); + bool trOpposite = oppositePlanes(rh); + return COMPARE_RESULT(9, trOpposite); + } else if (lrOrder == 1 && trOrder == 1) { + SkASSERT(ltOrder < 0); +// SkDEBUGCODE(bool trOpposite = oppositePlanes(rh)); + bool lrOpposite = lh->oppositePlanes(rh); +// SkASSERT(lrOpposite != trOpposite); + return COMPARE_RESULT(10, lrOpposite); + } + // If a pair couldn't be ordered, there's not enough information to determine the sort. + // Refer to: https://docs.google.com/drawings/d/1KV-8SJTedku9fj4K6fd1SB-8divuV_uivHVsSgwXICQ + if (fUnorderable || lh->fUnorderable || rh->fUnorderable) { + // limit to lines; should work with curves, but wait for a failing test to verify + if (!fPart.isCurve() && !lh->fPart.isCurve() && !rh->fPart.isCurve()) { + // see if original raw data is orderable + // if two share a point, check if third has both points in same half plane + int ltShare = lh->fOriginalCurvePart[0] == fOriginalCurvePart[0]; + int lrShare = lh->fOriginalCurvePart[0] == rh->fOriginalCurvePart[0]; + int trShare = fOriginalCurvePart[0] == rh->fOriginalCurvePart[0]; + // if only one pair are the same, the third point touches neither of the pair + if (ltShare + lrShare + trShare == 1) { + if (lrShare) { + int ltOOrder = lh->linesOnOriginalSide(this); + int rtOOrder = rh->linesOnOriginalSide(this); + if ((rtOOrder ^ ltOOrder) == 1) { + return ltOOrder; + } + } else if (trShare) { + int tlOOrder = this->linesOnOriginalSide(lh); + int rlOOrder = rh->linesOnOriginalSide(lh); + if ((tlOOrder ^ rlOOrder) == 1) { + return rlOOrder; + } + } else { + SkASSERT(ltShare); + int trOOrder = rh->linesOnOriginalSide(this); + int lrOOrder = lh->linesOnOriginalSide(rh); + // result must be 0 and 1 or 1 and 0 to be valid + if ((lrOOrder ^ trOOrder) == 1) { + return trOOrder; + } + } + } + } + } + if (lrOrder < 0) { + if (ltOrder < 0) { + return COMPARE_RESULT(11, trOrder); + } + return COMPARE_RESULT(12, ltOrder); + } + return COMPARE_RESULT(13, !lrOrder); +} + +int SkOpAngle::lineOnOneSide(const SkDPoint& origin, const SkDVector& line, const SkOpAngle* test, + bool useOriginal) const { + double crosses[3]; + SkPath::Verb testVerb = test->segment()->verb(); + int iMax = SkPathOpsVerbToPoints(testVerb); +// SkASSERT(origin == test.fCurveHalf[0]); + const SkDCurve& testCurve = useOriginal ? test->fOriginalCurvePart : test->fPart.fCurve; + for (int index = 1; index <= iMax; ++index) { + double xy1 = line.fX * (testCurve[index].fY - origin.fY); + double xy2 = line.fY * (testCurve[index].fX - origin.fX); + crosses[index - 1] = AlmostBequalUlps(xy1, xy2) ? 0 : xy1 - xy2; + } + if (crosses[0] * crosses[1] < 0) { + return -1; + } + if (SkPath::kCubic_Verb == testVerb) { + if (crosses[0] * crosses[2] < 0 || crosses[1] * crosses[2] < 0) { + return -1; + } + } + if (crosses[0]) { + return crosses[0] < 0; + } + if (crosses[1]) { + return crosses[1] < 0; + } + if (SkPath::kCubic_Verb == testVerb && crosses[2]) { + return crosses[2] < 0; + } + return -2; +} + +// given a line, see if the opposite curve's convex hull is all on one side +// returns -1=not on one side 0=this CW of test 1=this CCW of test +int SkOpAngle::lineOnOneSide(const SkOpAngle* test, bool useOriginal) { + SkASSERT(!fPart.isCurve()); + SkASSERT(test->fPart.isCurve()); + SkDPoint origin = fPart.fCurve[0]; + SkDVector line = fPart.fCurve[1] - origin; + int result = this->lineOnOneSide(origin, line, test, useOriginal); + if (-2 == result) { + fUnorderable = true; + result = -1; + } + return result; +} + +// experiment works only with lines for now +int SkOpAngle::linesOnOriginalSide(const SkOpAngle* test) { + SkASSERT(!fPart.isCurve()); + SkASSERT(!test->fPart.isCurve()); + SkDPoint origin = fOriginalCurvePart[0]; + SkDVector line = fOriginalCurvePart[1] - origin; + double dots[2]; + double crosses[2]; + const SkDCurve& testCurve = test->fOriginalCurvePart; + for (int index = 0; index < 2; ++index) { + SkDVector testLine = testCurve[index] - origin; + double xy1 = line.fX * testLine.fY; + double xy2 = line.fY * testLine.fX; + dots[index] = line.fX * testLine.fX + line.fY * testLine.fY; + crosses[index] = AlmostBequalUlps(xy1, xy2) ? 0 : xy1 - xy2; + } + if (crosses[0] * crosses[1] < 0) { + return -1; + } + if (crosses[0]) { + return crosses[0] < 0; + } + if (crosses[1]) { + return crosses[1] < 0; + } + if ((!dots[0] && dots[1] < 0) || (dots[0] < 0 && !dots[1])) { + return 2; // 180 degrees apart + } + fUnorderable = true; + return -1; +} + +// To sort the angles, all curves are translated to have the same starting point. +// If the curve's control point in its original position is on one side of a compared line, +// and translated is on the opposite side, reverse the previously computed order. +void SkOpAngle::alignmentSameSide(const SkOpAngle* test, int* order) const { + if (*order < 0) { + return; + } + if (fPart.isCurve()) { + // This should support all curve types, but only bug that requires this has lines + // Turning on for curves causes existing tests to fail + return; + } + if (test->fPart.isCurve()) { + return; + } + const SkDPoint& xOrigin = test->fPart.fCurve.fLine[0]; + const SkDPoint& oOrigin = test->fOriginalCurvePart.fLine[0]; + if (xOrigin == oOrigin) { + return; + } + int iMax = SkPathOpsVerbToPoints(this->segment()->verb()); + SkDVector xLine = test->fPart.fCurve.fLine[1] - xOrigin; + SkDVector oLine = test->fOriginalCurvePart.fLine[1] - oOrigin; + for (int index = 1; index <= iMax; ++index) { + const SkDPoint& testPt = fPart.fCurve[index]; + double xCross = oLine.crossCheck(testPt - xOrigin); + double oCross = xLine.crossCheck(testPt - oOrigin); + if (oCross * xCross < 0) { + *order ^= 1; + break; + } + } +} + +bool SkOpAngle::checkCrossesZero() const { + int start = std::min(fSectorStart, fSectorEnd); + int end = std::max(fSectorStart, fSectorEnd); + bool crossesZero = end - start > 16; + return crossesZero; +} + +bool SkOpAngle::checkParallel(SkOpAngle* rh) { + SkDVector scratch[2]; + const SkDVector* sweep, * tweep; + if (this->fPart.isOrdered()) { + sweep = this->fPart.fSweep; + } else { + scratch[0] = this->fPart.fCurve[1] - this->fPart.fCurve[0]; + sweep = &scratch[0]; + } + if (rh->fPart.isOrdered()) { + tweep = rh->fPart.fSweep; + } else { + scratch[1] = rh->fPart.fCurve[1] - rh->fPart.fCurve[0]; + tweep = &scratch[1]; + } + double s0xt0 = sweep->crossCheck(*tweep); + if (tangentsDiverge(rh, s0xt0)) { + return s0xt0 < 0; + } + // compute the perpendicular to the endpoints and see where it intersects the opposite curve + // if the intersections within the t range, do a cross check on those + bool inside; + if (!fEnd->contains(rh->fEnd)) { + if (this->endToSide(rh, &inside)) { + return inside; + } + if (rh->endToSide(this, &inside)) { + return !inside; + } + } + if (this->midToSide(rh, &inside)) { + return inside; + } + if (rh->midToSide(this, &inside)) { + return !inside; + } + // compute the cross check from the mid T values (last resort) + SkDVector m0 = segment()->dPtAtT(this->midT()) - this->fPart.fCurve[0]; + SkDVector m1 = rh->segment()->dPtAtT(rh->midT()) - rh->fPart.fCurve[0]; + double m0xm1 = m0.crossCheck(m1); + if (m0xm1 == 0) { + this->fUnorderable = true; + rh->fUnorderable = true; + return true; + } + return m0xm1 < 0; +} + +// the original angle is too short to get meaningful sector information +// lengthen it until it is long enough to be meaningful or leave it unset if lengthening it +// would cause it to intersect one of the adjacent angles +bool SkOpAngle::computeSector() { + if (fComputedSector) { + return !fUnorderable; + } + fComputedSector = true; + bool stepUp = fStart->t() < fEnd->t(); + SkOpSpanBase* checkEnd = fEnd; + if (checkEnd->final() && stepUp) { + fUnorderable = true; + return false; + } + do { +// advance end + const SkOpSegment* other = checkEnd->segment(); + const SkOpSpanBase* oSpan = other->head(); + do { + if (oSpan->segment() != segment()) { + continue; + } + if (oSpan == checkEnd) { + continue; + } + if (!approximately_equal(oSpan->t(), checkEnd->t())) { + continue; + } + goto recomputeSector; + } while (!oSpan->final() && (oSpan = oSpan->upCast()->next())); + checkEnd = stepUp ? !checkEnd->final() + ? checkEnd->upCast()->next() : nullptr + : checkEnd->prev(); + } while (checkEnd); +recomputeSector: + SkOpSpanBase* computedEnd = stepUp ? checkEnd ? checkEnd->prev() : fEnd->segment()->head() + : checkEnd ? checkEnd->upCast()->next() : fEnd->segment()->tail(); + if (checkEnd == fEnd || computedEnd == fEnd || computedEnd == fStart) { + fUnorderable = true; + return false; + } + if (stepUp != (fStart->t() < computedEnd->t())) { + fUnorderable = true; + return false; + } + SkOpSpanBase* saveEnd = fEnd; + fComputedEnd = fEnd = computedEnd; + setSpans(); + setSector(); + fEnd = saveEnd; + return !fUnorderable; +} + +int SkOpAngle::convexHullOverlaps(const SkOpAngle* rh) { + const SkDVector* sweep = this->fPart.fSweep; + const SkDVector* tweep = rh->fPart.fSweep; + double s0xs1 = sweep[0].crossCheck(sweep[1]); + double s0xt0 = sweep[0].crossCheck(tweep[0]); + double s1xt0 = sweep[1].crossCheck(tweep[0]); + bool tBetweenS = s0xs1 > 0 ? s0xt0 > 0 && s1xt0 < 0 : s0xt0 < 0 && s1xt0 > 0; + double s0xt1 = sweep[0].crossCheck(tweep[1]); + double s1xt1 = sweep[1].crossCheck(tweep[1]); + tBetweenS |= s0xs1 > 0 ? s0xt1 > 0 && s1xt1 < 0 : s0xt1 < 0 && s1xt1 > 0; + double t0xt1 = tweep[0].crossCheck(tweep[1]); + if (tBetweenS) { + return -1; + } + if ((s0xt0 == 0 && s1xt1 == 0) || (s1xt0 == 0 && s0xt1 == 0)) { // s0 to s1 equals t0 to t1 + return -1; + } + bool sBetweenT = t0xt1 > 0 ? s0xt0 < 0 && s0xt1 > 0 : s0xt0 > 0 && s0xt1 < 0; + sBetweenT |= t0xt1 > 0 ? s1xt0 < 0 && s1xt1 > 0 : s1xt0 > 0 && s1xt1 < 0; + if (sBetweenT) { + return -1; + } + // if all of the sweeps are in the same half plane, then the order of any pair is enough + if (s0xt0 >= 0 && s0xt1 >= 0 && s1xt0 >= 0 && s1xt1 >= 0) { + return 0; + } + if (s0xt0 <= 0 && s0xt1 <= 0 && s1xt0 <= 0 && s1xt1 <= 0) { + return 1; + } + // if the outside sweeps are greater than 180 degress: + // first assume the inital tangents are the ordering + // if the midpoint direction matches the inital order, that is enough + SkDVector m0 = this->segment()->dPtAtT(this->midT()) - this->fPart.fCurve[0]; + SkDVector m1 = rh->segment()->dPtAtT(rh->midT()) - rh->fPart.fCurve[0]; + double m0xm1 = m0.crossCheck(m1); + if (s0xt0 > 0 && m0xm1 > 0) { + return 0; + } + if (s0xt0 < 0 && m0xm1 < 0) { + return 1; + } + if (tangentsDiverge(rh, s0xt0)) { + return s0xt0 < 0; + } + return m0xm1 < 0; +} + +// OPTIMIZATION: longest can all be either lazily computed here or precomputed in setup +double SkOpAngle::distEndRatio(double dist) const { + double longest = 0; + const SkOpSegment& segment = *this->segment(); + int ptCount = SkPathOpsVerbToPoints(segment.verb()); + const SkPoint* pts = segment.pts(); + for (int idx1 = 0; idx1 <= ptCount - 1; ++idx1) { + for (int idx2 = idx1 + 1; idx2 <= ptCount; ++idx2) { + if (idx1 == idx2) { + continue; + } + SkDVector v; + v.set(pts[idx2] - pts[idx1]); + double lenSq = v.lengthSquared(); + longest = std::max(longest, lenSq); + } + } + return sqrt(longest) / dist; +} + +bool SkOpAngle::endsIntersect(SkOpAngle* rh) { + SkPath::Verb lVerb = this->segment()->verb(); + SkPath::Verb rVerb = rh->segment()->verb(); + int lPts = SkPathOpsVerbToPoints(lVerb); + int rPts = SkPathOpsVerbToPoints(rVerb); + SkDLine rays[] = {{{this->fPart.fCurve[0], rh->fPart.fCurve[rPts]}}, + {{this->fPart.fCurve[0], this->fPart.fCurve[lPts]}}}; + if (this->fEnd->contains(rh->fEnd)) { + return checkParallel(rh); + } + double smallTs[2] = {-1, -1}; + bool limited[2] = {false, false}; + for (int index = 0; index < 2; ++index) { + SkPath::Verb cVerb = index ? rVerb : lVerb; + // if the curve is a line, then the line and the ray intersect only at their crossing + if (cVerb == SkPath::kLine_Verb) { + continue; + } + const SkOpSegment& segment = index ? *rh->segment() : *this->segment(); + SkIntersections i; + (*CurveIntersectRay[cVerb])(segment.pts(), segment.weight(), rays[index], &i); + double tStart = index ? rh->fStart->t() : this->fStart->t(); + double tEnd = index ? rh->fComputedEnd->t() : this->fComputedEnd->t(); + bool testAscends = tStart < (index ? rh->fComputedEnd->t() : this->fComputedEnd->t()); + double t = testAscends ? 0 : 1; + for (int idx2 = 0; idx2 < i.used(); ++idx2) { + double testT = i[0][idx2]; + if (!approximately_between_orderable(tStart, testT, tEnd)) { + continue; + } + if (approximately_equal_orderable(tStart, testT)) { + continue; + } + smallTs[index] = t = testAscends ? std::max(t, testT) : std::min(t, testT); + limited[index] = approximately_equal_orderable(t, tEnd); + } + } + bool sRayLonger = false; + SkDVector sCept = {0, 0}; + double sCeptT = -1; + int sIndex = -1; + bool useIntersect = false; + for (int index = 0; index < 2; ++index) { + if (smallTs[index] < 0) { + continue; + } + const SkOpSegment& segment = index ? *rh->segment() : *this->segment(); + const SkDPoint& dPt = segment.dPtAtT(smallTs[index]); + SkDVector cept = dPt - rays[index][0]; + // If this point is on the curve, it should have been detected earlier by ordinary + // curve intersection. This may be hard to determine in general, but for lines, + // the point could be close to or equal to its end, but shouldn't be near the start. + if ((index ? lPts : rPts) == 1) { + SkDVector total = rays[index][1] - rays[index][0]; + if (cept.lengthSquared() * 2 < total.lengthSquared()) { + continue; + } + } + SkDVector end = rays[index][1] - rays[index][0]; + if (cept.fX * end.fX < 0 || cept.fY * end.fY < 0) { + continue; + } + double rayDist = cept.length(); + double endDist = end.length(); + bool rayLonger = rayDist > endDist; + if (limited[0] && limited[1] && rayLonger) { + useIntersect = true; + sRayLonger = rayLonger; + sCept = cept; + sCeptT = smallTs[index]; + sIndex = index; + break; + } + double delta = fabs(rayDist - endDist); + double minX, minY, maxX, maxY; + minX = minY = SK_ScalarInfinity; + maxX = maxY = -SK_ScalarInfinity; + const SkDCurve& curve = index ? rh->fPart.fCurve : this->fPart.fCurve; + int ptCount = index ? rPts : lPts; + for (int idx2 = 0; idx2 <= ptCount; ++idx2) { + minX = std::min(minX, curve[idx2].fX); + minY = std::min(minY, curve[idx2].fY); + maxX = std::max(maxX, curve[idx2].fX); + maxY = std::max(maxY, curve[idx2].fY); + } + double maxWidth = std::max(maxX - minX, maxY - minY); + delta = sk_ieee_double_divide(delta, maxWidth); + // FIXME: move these magic numbers + // This fixes skbug.com/8380 + // Larger changes (like changing the constant in the next block) cause other + // tests to fail as documented in the bug. + // This could probably become a more general test: e.g., if translating the + // curve causes the cross product of any control point or end point to change + // sign with regard to the opposite curve's hull, treat the curves as parallel. + + // Moreso, this points to the general fragility of this approach of assigning + // winding by sorting the angles of curves sharing a common point, as mentioned + // in the bug. + if (delta < 4e-3 && delta > 1e-3 && !useIntersect && fPart.isCurve() + && rh->fPart.isCurve() && fOriginalCurvePart[0] != fPart.fCurve.fLine[0]) { + // see if original curve is on one side of hull; translated is on the other + const SkDPoint& origin = rh->fOriginalCurvePart[0]; + int count = SkPathOpsVerbToPoints(rh->segment()->verb()); + const SkDVector line = rh->fOriginalCurvePart[count] - origin; + int originalSide = rh->lineOnOneSide(origin, line, this, true); + if (originalSide >= 0) { + int translatedSide = rh->lineOnOneSide(origin, line, this, false); + if (originalSide != translatedSide) { + continue; + } + } + } + if (delta > 1e-3 && (useIntersect ^= true)) { + sRayLonger = rayLonger; + sCept = cept; + sCeptT = smallTs[index]; + sIndex = index; + } + } + if (useIntersect) { + const SkDCurve& curve = sIndex ? rh->fPart.fCurve : this->fPart.fCurve; + const SkOpSegment& segment = sIndex ? *rh->segment() : *this->segment(); + double tStart = sIndex ? rh->fStart->t() : fStart->t(); + SkDVector mid = segment.dPtAtT(tStart + (sCeptT - tStart) / 2) - curve[0]; + double septDir = mid.crossCheck(sCept); + if (!septDir) { + return checkParallel(rh); + } + return sRayLonger ^ (sIndex == 0) ^ (septDir < 0); + } else { + return checkParallel(rh); + } +} + +bool SkOpAngle::endToSide(const SkOpAngle* rh, bool* inside) const { + const SkOpSegment* segment = this->segment(); + SkPath::Verb verb = segment->verb(); + SkDLine rayEnd; + rayEnd[0].set(this->fEnd->pt()); + rayEnd[1] = rayEnd[0]; + SkDVector slopeAtEnd = (*CurveDSlopeAtT[verb])(segment->pts(), segment->weight(), + this->fEnd->t()); + rayEnd[1].fX += slopeAtEnd.fY; + rayEnd[1].fY -= slopeAtEnd.fX; + SkIntersections iEnd; + const SkOpSegment* oppSegment = rh->segment(); + SkPath::Verb oppVerb = oppSegment->verb(); + (*CurveIntersectRay[oppVerb])(oppSegment->pts(), oppSegment->weight(), rayEnd, &iEnd); + double endDist; + int closestEnd = iEnd.closestTo(rh->fStart->t(), rh->fEnd->t(), rayEnd[0], &endDist); + if (closestEnd < 0) { + return false; + } + if (!endDist) { + return false; + } + SkDPoint start; + start.set(this->fStart->pt()); + // OPTIMIZATION: multiple times in the code we find the max scalar + double minX, minY, maxX, maxY; + minX = minY = SK_ScalarInfinity; + maxX = maxY = -SK_ScalarInfinity; + const SkDCurve& curve = rh->fPart.fCurve; + int oppPts = SkPathOpsVerbToPoints(oppVerb); + for (int idx2 = 0; idx2 <= oppPts; ++idx2) { + minX = std::min(minX, curve[idx2].fX); + minY = std::min(minY, curve[idx2].fY); + maxX = std::max(maxX, curve[idx2].fX); + maxY = std::max(maxY, curve[idx2].fY); + } + double maxWidth = std::max(maxX - minX, maxY - minY); + endDist = sk_ieee_double_divide(endDist, maxWidth); + if (!(endDist >= 5e-12)) { // empirically found + return false; // ! above catches NaN + } + const SkDPoint* endPt = &rayEnd[0]; + SkDPoint oppPt = iEnd.pt(closestEnd); + SkDVector vLeft = *endPt - start; + SkDVector vRight = oppPt - start; + double dir = vLeft.crossNoNormalCheck(vRight); + if (!dir) { + return false; + } + *inside = dir < 0; + return true; +} + +/* y<0 y==0 y>0 x<0 x==0 x>0 xy<0 xy==0 xy>0 + 0 x x x + 1 x x x + 2 x x x + 3 x x x + 4 x x x + 5 x x x + 6 x x x + 7 x x x + 8 x x x + 9 x x x + 10 x x x + 11 x x x + 12 x x x + 13 x x x + 14 x x x + 15 x x x +*/ +int SkOpAngle::findSector(SkPath::Verb verb, double x, double y) const { + double absX = fabs(x); + double absY = fabs(y); + double xy = SkPath::kLine_Verb == verb || !AlmostEqualUlps(absX, absY) ? absX - absY : 0; + // If there are four quadrants and eight octants, and since the Latin for sixteen is sedecim, + // one could coin the term sedecimant for a space divided into 16 sections. + // http://english.stackexchange.com/questions/133688/word-for-something-partitioned-into-16-parts + static const int sedecimant[3][3][3] = { + // y<0 y==0 y>0 + // x<0 x==0 x>0 x<0 x==0 x>0 x<0 x==0 x>0 + {{ 4, 3, 2}, { 7, -1, 15}, {10, 11, 12}}, // abs(x) < abs(y) + {{ 5, -1, 1}, {-1, -1, -1}, { 9, -1, 13}}, // abs(x) == abs(y) + {{ 6, 3, 0}, { 7, -1, 15}, { 8, 11, 14}}, // abs(x) > abs(y) + }; + int sector = sedecimant[(xy >= 0) + (xy > 0)][(y >= 0) + (y > 0)][(x >= 0) + (x > 0)] * 2 + 1; +// SkASSERT(SkPath::kLine_Verb == verb || sector >= 0); + return sector; +} + +SkOpGlobalState* SkOpAngle::globalState() const { + return this->segment()->globalState(); +} + + +// OPTIMIZE: if this loops to only one other angle, after first compare fails, insert on other side +// OPTIMIZE: return where insertion succeeded. Then, start next insertion on opposite side +bool SkOpAngle::insert(SkOpAngle* angle) { + if (angle->fNext) { + if (loopCount() >= angle->loopCount()) { + if (!merge(angle)) { + return true; + } + } else if (fNext) { + if (!angle->merge(this)) { + return true; + } + } else { + angle->insert(this); + } + return true; + } + bool singleton = nullptr == fNext; + if (singleton) { + fNext = this; + } + SkOpAngle* next = fNext; + if (next->fNext == this) { + if (singleton || angle->after(this)) { + this->fNext = angle; + angle->fNext = next; + } else { + next->fNext = angle; + angle->fNext = this; + } + debugValidateNext(); + return true; + } + SkOpAngle* last = this; + bool flipAmbiguity = false; + do { + SkASSERT(last->fNext == next); + if (angle->after(last) ^ (angle->tangentsAmbiguous() & flipAmbiguity)) { + last->fNext = angle; + angle->fNext = next; + debugValidateNext(); + break; + } + last = next; + if (last == this) { + FAIL_IF(flipAmbiguity); + // We're in a loop. If a sort was ambiguous, flip it to end the loop. + flipAmbiguity = true; + } + next = next->fNext; + } while (true); + return true; +} + +SkOpSpanBase* SkOpAngle::lastMarked() const { + if (fLastMarked) { + if (fLastMarked->chased()) { + return nullptr; + } + fLastMarked->setChased(true); + } + return fLastMarked; +} + +bool SkOpAngle::loopContains(const SkOpAngle* angle) const { + if (!fNext) { + return false; + } + const SkOpAngle* first = this; + const SkOpAngle* loop = this; + const SkOpSegment* tSegment = angle->fStart->segment(); + double tStart = angle->fStart->t(); + double tEnd = angle->fEnd->t(); + do { + const SkOpSegment* lSegment = loop->fStart->segment(); + if (lSegment != tSegment) { + continue; + } + double lStart = loop->fStart->t(); + if (lStart != tEnd) { + continue; + } + double lEnd = loop->fEnd->t(); + if (lEnd == tStart) { + return true; + } + } while ((loop = loop->fNext) != first); + return false; +} + +int SkOpAngle::loopCount() const { + int count = 0; + const SkOpAngle* first = this; + const SkOpAngle* next = this; + do { + next = next->fNext; + ++count; + } while (next && next != first); + return count; +} + +bool SkOpAngle::merge(SkOpAngle* angle) { + SkASSERT(fNext); + SkASSERT(angle->fNext); + SkOpAngle* working = angle; + do { + if (this == working) { + return false; + } + working = working->fNext; + } while (working != angle); + do { + SkOpAngle* next = working->fNext; + working->fNext = nullptr; + insert(working); + working = next; + } while (working != angle); + // it's likely that a pair of the angles are unorderable + debugValidateNext(); + return true; +} + +double SkOpAngle::midT() const { + return (fStart->t() + fEnd->t()) / 2; +} + +bool SkOpAngle::midToSide(const SkOpAngle* rh, bool* inside) const { + const SkOpSegment* segment = this->segment(); + SkPath::Verb verb = segment->verb(); + const SkPoint& startPt = this->fStart->pt(); + const SkPoint& endPt = this->fEnd->pt(); + SkDPoint dStartPt; + dStartPt.set(startPt); + SkDLine rayMid; + rayMid[0].fX = (startPt.fX + endPt.fX) / 2; + rayMid[0].fY = (startPt.fY + endPt.fY) / 2; + rayMid[1].fX = rayMid[0].fX + (endPt.fY - startPt.fY); + rayMid[1].fY = rayMid[0].fY - (endPt.fX - startPt.fX); + SkIntersections iMid; + (*CurveIntersectRay[verb])(segment->pts(), segment->weight(), rayMid, &iMid); + int iOutside = iMid.mostOutside(this->fStart->t(), this->fEnd->t(), dStartPt); + if (iOutside < 0) { + return false; + } + const SkOpSegment* oppSegment = rh->segment(); + SkPath::Verb oppVerb = oppSegment->verb(); + SkIntersections oppMid; + (*CurveIntersectRay[oppVerb])(oppSegment->pts(), oppSegment->weight(), rayMid, &oppMid); + int oppOutside = oppMid.mostOutside(rh->fStart->t(), rh->fEnd->t(), dStartPt); + if (oppOutside < 0) { + return false; + } + SkDVector iSide = iMid.pt(iOutside) - dStartPt; + SkDVector oppSide = oppMid.pt(oppOutside) - dStartPt; + double dir = iSide.crossCheck(oppSide); + if (!dir) { + return false; + } + *inside = dir < 0; + return true; +} + +bool SkOpAngle::oppositePlanes(const SkOpAngle* rh) const { + int startSpan = SkTAbs(rh->fSectorStart - fSectorStart); + return startSpan >= 8; +} + +int SkOpAngle::orderable(SkOpAngle* rh) { + int result; + if (!fPart.isCurve()) { + if (!rh->fPart.isCurve()) { + double leftX = fTangentHalf.dx(); + double leftY = fTangentHalf.dy(); + double rightX = rh->fTangentHalf.dx(); + double rightY = rh->fTangentHalf.dy(); + double x_ry = leftX * rightY; + double rx_y = rightX * leftY; + if (x_ry == rx_y) { + if (leftX * rightX < 0 || leftY * rightY < 0) { + return 1; // exactly 180 degrees apart + } + goto unorderable; + } + SkASSERT(x_ry != rx_y); // indicates an undetected coincidence -- worth finding earlier + return x_ry < rx_y ? 1 : 0; + } + if ((result = this->lineOnOneSide(rh, false)) >= 0) { + return result; + } + if (fUnorderable || approximately_zero(rh->fSide)) { + goto unorderable; + } + } else if (!rh->fPart.isCurve()) { + if ((result = rh->lineOnOneSide(this, false)) >= 0) { + return result ? 0 : 1; + } + if (rh->fUnorderable || approximately_zero(fSide)) { + goto unorderable; + } + } else if ((result = this->convexHullOverlaps(rh)) >= 0) { + return result; + } + return this->endsIntersect(rh) ? 1 : 0; +unorderable: + fUnorderable = true; + rh->fUnorderable = true; + return -1; +} + +// OPTIMIZE: if this shows up in a profile, add a previous pointer +// as is, this should be rarely called +SkOpAngle* SkOpAngle::previous() const { + SkOpAngle* last = fNext; + do { + SkOpAngle* next = last->fNext; + if (next == this) { + return last; + } + last = next; + } while (true); +} + +SkOpSegment* SkOpAngle::segment() const { + return fStart->segment(); +} + +void SkOpAngle::set(SkOpSpanBase* start, SkOpSpanBase* end) { + fStart = start; + fComputedEnd = fEnd = end; + SkASSERT(start != end); + fNext = nullptr; + fComputeSector = fComputedSector = fCheckCoincidence = fTangentsAmbiguous = false; + setSpans(); + setSector(); + SkDEBUGCODE(fID = start ? start->globalState()->nextAngleID() : -1); +} + +void SkOpAngle::setSpans() { + fUnorderable = false; + fLastMarked = nullptr; + if (!fStart) { + fUnorderable = true; + return; + } + const SkOpSegment* segment = fStart->segment(); + const SkPoint* pts = segment->pts(); + SkDEBUGCODE(fPart.fCurve.fVerb = SkPath::kCubic_Verb); // required for SkDCurve debug check + SkDEBUGCODE(fPart.fCurve[2].fX = fPart.fCurve[2].fY = fPart.fCurve[3].fX = fPart.fCurve[3].fY + = SK_ScalarNaN); // make the non-line part uninitialized + SkDEBUGCODE(fPart.fCurve.fVerb = segment->verb()); // set the curve type for real + segment->subDivide(fStart, fEnd, &fPart.fCurve); // set at least the line part if not more + fOriginalCurvePart = fPart.fCurve; + const SkPath::Verb verb = segment->verb(); + fPart.setCurveHullSweep(verb); + if (SkPath::kLine_Verb != verb && !fPart.isCurve()) { + SkDLine lineHalf; + fPart.fCurve[1] = fPart.fCurve[SkPathOpsVerbToPoints(verb)]; + fOriginalCurvePart[1] = fPart.fCurve[1]; + lineHalf[0].set(fPart.fCurve[0].asSkPoint()); + lineHalf[1].set(fPart.fCurve[1].asSkPoint()); + fTangentHalf.lineEndPoints(lineHalf); + fSide = 0; + } + switch (verb) { + case SkPath::kLine_Verb: { + SkASSERT(fStart != fEnd); + const SkPoint& cP1 = pts[fStart->t() < fEnd->t()]; + SkDLine lineHalf; + lineHalf[0].set(fStart->pt()); + lineHalf[1].set(cP1); + fTangentHalf.lineEndPoints(lineHalf); + fSide = 0; + } return; + case SkPath::kQuad_Verb: + case SkPath::kConic_Verb: { + SkLineParameters tangentPart; + (void) tangentPart.quadEndPoints(fPart.fCurve.fQuad); + fSide = -tangentPart.pointDistance(fPart.fCurve[2]); // not normalized -- compare sign only + } break; + case SkPath::kCubic_Verb: { + SkLineParameters tangentPart; + (void) tangentPart.cubicPart(fPart.fCurve.fCubic); + fSide = -tangentPart.pointDistance(fPart.fCurve[3]); + double testTs[4]; + // OPTIMIZATION: keep inflections precomputed with cubic segment? + int testCount = SkDCubic::FindInflections(pts, testTs); + double startT = fStart->t(); + double endT = fEnd->t(); + double limitT = endT; + int index; + for (index = 0; index < testCount; ++index) { + if (!::between(startT, testTs[index], limitT)) { + testTs[index] = -1; + } + } + testTs[testCount++] = startT; + testTs[testCount++] = endT; + SkTQSort(testTs, testTs + testCount); + double bestSide = 0; + int testCases = (testCount << 1) - 1; + index = 0; + while (testTs[index] < 0) { + ++index; + } + index <<= 1; + for (; index < testCases; ++index) { + int testIndex = index >> 1; + double testT = testTs[testIndex]; + if (index & 1) { + testT = (testT + testTs[testIndex + 1]) / 2; + } + // OPTIMIZE: could avoid call for t == startT, endT + SkDPoint pt = dcubic_xy_at_t(pts, segment->weight(), testT); + SkLineParameters testPart; + testPart.cubicEndPoints(fPart.fCurve.fCubic); + double testSide = testPart.pointDistance(pt); + if (fabs(bestSide) < fabs(testSide)) { + bestSide = testSide; + } + } + fSide = -bestSide; // compare sign only + } break; + default: + SkASSERT(0); + } +} + +void SkOpAngle::setSector() { + if (!fStart) { + fUnorderable = true; + return; + } + const SkOpSegment* segment = fStart->segment(); + SkPath::Verb verb = segment->verb(); + fSectorStart = this->findSector(verb, fPart.fSweep[0].fX, fPart.fSweep[0].fY); + if (fSectorStart < 0) { + goto deferTilLater; + } + if (!fPart.isCurve()) { // if it's a line or line-like, note that both sectors are the same + SkASSERT(fSectorStart >= 0); + fSectorEnd = fSectorStart; + fSectorMask = 1 << fSectorStart; + return; + } + SkASSERT(SkPath::kLine_Verb != verb); + fSectorEnd = this->findSector(verb, fPart.fSweep[1].fX, fPart.fSweep[1].fY); + if (fSectorEnd < 0) { +deferTilLater: + fSectorStart = fSectorEnd = -1; + fSectorMask = 0; + fComputeSector = true; // can't determine sector until segment length can be found + return; + } + if (fSectorEnd == fSectorStart + && (fSectorStart & 3) != 3) { // if the sector has no span, it can't be an exact angle + fSectorMask = 1 << fSectorStart; + return; + } + bool crossesZero = this->checkCrossesZero(); + int start = std::min(fSectorStart, fSectorEnd); + bool curveBendsCCW = (fSectorStart == start) ^ crossesZero; + // bump the start and end of the sector span if they are on exact compass points + if ((fSectorStart & 3) == 3) { + fSectorStart = (fSectorStart + (curveBendsCCW ? 1 : 31)) & 0x1f; + } + if ((fSectorEnd & 3) == 3) { + fSectorEnd = (fSectorEnd + (curveBendsCCW ? 31 : 1)) & 0x1f; + } + crossesZero = this->checkCrossesZero(); + start = std::min(fSectorStart, fSectorEnd); + int end = std::max(fSectorStart, fSectorEnd); + if (!crossesZero) { + fSectorMask = (unsigned) -1 >> (31 - end + start) << start; + } else { + fSectorMask = (unsigned) -1 >> (31 - start) | ((unsigned) -1 << end); + } +} + +SkOpSpan* SkOpAngle::starter() { + return fStart->starter(fEnd); +} + +bool SkOpAngle::tangentsDiverge(const SkOpAngle* rh, double s0xt0) { + if (s0xt0 == 0) { + return false; + } + // if the ctrl tangents are not nearly parallel, use them + // solve for opposite direction displacement scale factor == m + // initial dir = v1.cross(v2) == v2.x * v1.y - v2.y * v1.x + // displacement of q1[1] : dq1 = { -m * v1.y, m * v1.x } + q1[1] + // straight angle when : v2.x * (dq1.y - q1[0].y) == v2.y * (dq1.x - q1[0].x) + // v2.x * (m * v1.x + v1.y) == v2.y * (-m * v1.y + v1.x) + // - m * (v2.x * v1.x + v2.y * v1.y) == v2.x * v1.y - v2.y * v1.x + // m = (v2.y * v1.x - v2.x * v1.y) / (v2.x * v1.x + v2.y * v1.y) + // m = v1.cross(v2) / v1.dot(v2) + const SkDVector* sweep = fPart.fSweep; + const SkDVector* tweep = rh->fPart.fSweep; + double s0dt0 = sweep[0].dot(tweep[0]); + if (!s0dt0) { + return true; + } + SkASSERT(s0dt0 != 0); + double m = s0xt0 / s0dt0; + double sDist = sweep[0].length() * m; + double tDist = tweep[0].length() * m; + bool useS = fabs(sDist) < fabs(tDist); + double mFactor = fabs(useS ? this->distEndRatio(sDist) : rh->distEndRatio(tDist)); + fTangentsAmbiguous = mFactor >= 50 && mFactor < 200; + return mFactor < 50; // empirically found limit +} diff --git a/gfx/skia/skia/src/pathops/SkOpAngle.h b/gfx/skia/skia/src/pathops/SkOpAngle.h new file mode 100644 index 0000000000..eeff91d09f --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpAngle.h @@ -0,0 +1,156 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkOpAngle_DEFINED +#define SkOpAngle_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "src/pathops/SkLineParameters.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsTypes.h" + +#if DEBUG_ANGLE +#include "include/core/SkString.h" +#endif + +#include + +class SkOpCoincidence; +class SkOpContour; +class SkOpPtT; +class SkOpSegment; +class SkOpSpan; +class SkOpSpanBase; +struct SkDPoint; +struct SkDVector; + +class SkOpAngle { +public: + enum IncludeType { + kUnaryWinding, + kUnaryXor, + kBinarySingle, + kBinaryOpp, + }; + + const SkOpAngle* debugAngle(int id) const; + const SkOpCoincidence* debugCoincidence() const; + SkOpContour* debugContour(int id) const; + + int debugID() const { + return SkDEBUGRELEASE(fID, -1); + } + +#if DEBUG_SORT + void debugLoop() const; +#endif + +#if DEBUG_ANGLE + bool debugCheckCoincidence() const { return fCheckCoincidence; } + void debugCheckNearCoincidence() const; + SkString debugPart() const; +#endif + const SkOpPtT* debugPtT(int id) const; + const SkOpSegment* debugSegment(int id) const; + int debugSign() const; + const SkOpSpanBase* debugSpan(int id) const; + void debugValidate() const; + void debugValidateNext() const; // in debug builds, verify that angle loop is uncorrupted + double distEndRatio(double dist) const; + // available to testing only + void dump() const; + void dumpCurves() const; + void dumpLoop() const; + void dumpOne(bool functionHeader) const; + void dumpTo(const SkOpSegment* fromSeg, const SkOpAngle* ) const; + void dumpTest() const; + + SkOpSpanBase* end() const { + return fEnd; + } + + bool insert(SkOpAngle* ); + SkOpSpanBase* lastMarked() const; + bool loopContains(const SkOpAngle* ) const; + int loopCount() const; + + SkOpAngle* next() const { + return fNext; + } + + SkOpAngle* previous() const; + SkOpSegment* segment() const; + void set(SkOpSpanBase* start, SkOpSpanBase* end); + + void setLastMarked(SkOpSpanBase* marked) { + fLastMarked = marked; + } + + SkOpSpanBase* start() const { + return fStart; + } + + SkOpSpan* starter(); + + bool tangentsAmbiguous() const { + return fTangentsAmbiguous; + } + + bool unorderable() const { + return fUnorderable; + } + +private: + bool after(SkOpAngle* test); + void alignmentSameSide(const SkOpAngle* test, int* order) const; + bool checkCrossesZero() const; + bool checkParallel(SkOpAngle* ); + bool computeSector(); + int convexHullOverlaps(const SkOpAngle* ); + bool endToSide(const SkOpAngle* rh, bool* inside) const; + bool endsIntersect(SkOpAngle* ); + int findSector(SkPath::Verb verb, double x, double y) const; + SkOpGlobalState* globalState() const; + int lineOnOneSide(const SkDPoint& origin, const SkDVector& line, const SkOpAngle* test, + bool useOriginal) const; + int lineOnOneSide(const SkOpAngle* test, bool useOriginal); + int linesOnOriginalSide(const SkOpAngle* test); + bool merge(SkOpAngle* ); + double midT() const; + bool midToSide(const SkOpAngle* rh, bool* inside) const; + bool oppositePlanes(const SkOpAngle* rh) const; + int orderable(SkOpAngle* rh); // false == this < rh ; true == this > rh; -1 == unorderable + void setSector(); + void setSpans(); + bool tangentsDiverge(const SkOpAngle* rh, double s0xt0); + + SkDCurve fOriginalCurvePart; // the curve from start to end + SkDCurveSweep fPart; // the curve from start to end offset as needed + double fSide; + SkLineParameters fTangentHalf; // used only to sort a pair of lines or line-like sections + SkOpAngle* fNext; + SkOpSpanBase* fLastMarked; + SkOpSpanBase* fStart; + SkOpSpanBase* fEnd; + SkOpSpanBase* fComputedEnd; + int fSectorMask; + int8_t fSectorStart; // in 32nds of a circle + int8_t fSectorEnd; + bool fUnorderable; + bool fComputeSector; + bool fComputedSector; + bool fCheckCoincidence; + bool fTangentsAmbiguous; + SkDEBUGCODE(int fID); + + friend class PathOpsAngleTester; +}; + + + +#endif diff --git a/gfx/skia/skia/src/pathops/SkOpBuilder.cpp b/gfx/skia/skia/src/pathops/SkOpBuilder.cpp new file mode 100644 index 0000000000..57752e3a57 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpBuilder.cpp @@ -0,0 +1,212 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPath.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkPathEnums.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkPathPriv.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpEdgeBuilder.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsCommon.h" +#include "src/pathops/SkPathOpsTypes.h" +#include "src/pathops/SkPathWriter.h" + +#include + +static bool one_contour(const SkPath& path) { + SkSTArenaAlloc<256> allocator; + int verbCount = path.countVerbs(); + uint8_t* verbs = (uint8_t*) allocator.makeArrayDefault(verbCount); + (void) path.getVerbs(verbs, verbCount); + for (int index = 1; index < verbCount; ++index) { + if (verbs[index] == SkPath::kMove_Verb) { + return false; + } + } + return true; +} + +void SkOpBuilder::ReversePath(SkPath* path) { + SkPath temp; + SkPoint lastPt; + SkAssertResult(path->getLastPt(&lastPt)); + temp.moveTo(lastPt); + temp.reversePathTo(*path); + temp.close(); + *path = temp; +} + +bool SkOpBuilder::FixWinding(SkPath* path) { + SkPathFillType fillType = path->getFillType(); + if (fillType == SkPathFillType::kInverseEvenOdd) { + fillType = SkPathFillType::kInverseWinding; + } else if (fillType == SkPathFillType::kEvenOdd) { + fillType = SkPathFillType::kWinding; + } + if (one_contour(*path)) { + SkPathFirstDirection dir = SkPathPriv::ComputeFirstDirection(*path); + if (dir != SkPathFirstDirection::kUnknown) { + if (dir == SkPathFirstDirection::kCW) { + ReversePath(path); + } + path->setFillType(fillType); + return true; + } + } + SkSTArenaAlloc<4096> allocator; + SkOpContourHead contourHead; + SkOpGlobalState globalState(&contourHead, &allocator SkDEBUGPARAMS(false) + SkDEBUGPARAMS(nullptr)); + SkOpEdgeBuilder builder(*path, &contourHead, &globalState); + if (builder.unparseable() || !builder.finish()) { + return false; + } + if (!contourHead.count()) { + return true; + } + if (!contourHead.next()) { + return false; + } + contourHead.joinAllSegments(); + contourHead.resetReverse(); + bool writePath = false; + SkOpSpan* topSpan; + globalState.setPhase(SkOpPhase::kFixWinding); + while ((topSpan = FindSortableTop(&contourHead))) { + SkOpSegment* topSegment = topSpan->segment(); + SkOpContour* topContour = topSegment->contour(); + SkASSERT(topContour->isCcw() >= 0); +#if DEBUG_WINDING + SkDebugf("%s id=%d nested=%d ccw=%d\n", __FUNCTION__, + topSegment->debugID(), globalState.nested(), topContour->isCcw()); +#endif + if ((globalState.nested() & 1) != SkToBool(topContour->isCcw())) { + topContour->setReverse(); + writePath = true; + } + topContour->markAllDone(); + globalState.clearNested(); + } + if (!writePath) { + path->setFillType(fillType); + return true; + } + SkPath empty; + SkPathWriter woundPath(empty); + SkOpContour* test = &contourHead; + do { + if (!test->count()) { + continue; + } + if (test->reversed()) { + test->toReversePath(&woundPath); + } else { + test->toPath(&woundPath); + } + } while ((test = test->next())); + *path = *woundPath.nativePath(); + path->setFillType(fillType); + return true; +} + +void SkOpBuilder::add(const SkPath& path, SkPathOp op) { + if (fOps.empty() && op != kUnion_SkPathOp) { + fPathRefs.push_back() = SkPath(); + *fOps.append() = kUnion_SkPathOp; + } + fPathRefs.push_back() = path; + *fOps.append() = op; +} + +void SkOpBuilder::reset() { + fPathRefs.clear(); + fOps.reset(); +} + +/* OPTIMIZATION: Union doesn't need to be all-or-nothing. A run of three or more convex + paths with union ops could be locally resolved and still improve over doing the + ops one at a time. */ +bool SkOpBuilder::resolve(SkPath* result) { + SkPath original = *result; + int count = fOps.size(); + bool allUnion = true; + SkPathFirstDirection firstDir = SkPathFirstDirection::kUnknown; + for (int index = 0; index < count; ++index) { + SkPath* test = &fPathRefs[index]; + if (kUnion_SkPathOp != fOps[index] || test->isInverseFillType()) { + allUnion = false; + break; + } + // If all paths are convex, track direction, reversing as needed. + if (test->isConvex()) { + SkPathFirstDirection dir = SkPathPriv::ComputeFirstDirection(*test); + if (dir == SkPathFirstDirection::kUnknown) { + allUnion = false; + break; + } + if (firstDir == SkPathFirstDirection::kUnknown) { + firstDir = dir; + } else if (firstDir != dir) { + ReversePath(test); + } + continue; + } + // If the path is not convex but its bounds do not intersect the others, simplify is enough. + const SkRect& testBounds = test->getBounds(); + for (int inner = 0; inner < index; ++inner) { + // OPTIMIZE: check to see if the contour bounds do not intersect other contour bounds? + if (SkRect::Intersects(fPathRefs[inner].getBounds(), testBounds)) { + allUnion = false; + break; + } + } + } + if (!allUnion) { + *result = fPathRefs[0]; + for (int index = 1; index < count; ++index) { + if (!Op(*result, fPathRefs[index], fOps[index], result)) { + reset(); + *result = original; + return false; + } + } + reset(); + return true; + } + SkPath sum; + for (int index = 0; index < count; ++index) { + if (!Simplify(fPathRefs[index], &fPathRefs[index])) { + reset(); + *result = original; + return false; + } + if (!fPathRefs[index].isEmpty()) { + // convert the even odd result back to winding form before accumulating it + if (!FixWinding(&fPathRefs[index])) { + *result = original; + return false; + } + sum.addPath(fPathRefs[index]); + } + } + reset(); + bool success = Simplify(sum, result); + if (!success) { + *result = original; + } + return success; +} diff --git a/gfx/skia/skia/src/pathops/SkOpCoincidence.cpp b/gfx/skia/skia/src/pathops/SkOpCoincidence.cpp new file mode 100644 index 0000000000..4a8bcec1d8 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpCoincidence.cpp @@ -0,0 +1,1456 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkOpCoincidence.h" + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkTDArray.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" + +#include + +// returns true if coincident span's start and end are the same +bool SkCoincidentSpans::collapsed(const SkOpPtT* test) const { + return (fCoinPtTStart == test && fCoinPtTEnd->contains(test)) + || (fCoinPtTEnd == test && fCoinPtTStart->contains(test)) + || (fOppPtTStart == test && fOppPtTEnd->contains(test)) + || (fOppPtTEnd == test && fOppPtTStart->contains(test)); +} + +// out of line since this function is referenced by address +const SkOpPtT* SkCoincidentSpans::coinPtTEnd() const { + return fCoinPtTEnd; +} + +// out of line since this function is referenced by address +const SkOpPtT* SkCoincidentSpans::coinPtTStart() const { + return fCoinPtTStart; +} + +// sets the span's end to the ptT referenced by the previous-next +void SkCoincidentSpans::correctOneEnd( + const SkOpPtT* (SkCoincidentSpans::* getEnd)() const, + void (SkCoincidentSpans::*setEnd)(const SkOpPtT* ptT) ) { + const SkOpPtT* origPtT = (this->*getEnd)(); + const SkOpSpanBase* origSpan = origPtT->span(); + const SkOpSpan* prev = origSpan->prev(); + const SkOpPtT* testPtT = prev ? prev->next()->ptT() + : origSpan->upCast()->next()->prev()->ptT(); + if (origPtT != testPtT) { + (this->*setEnd)(testPtT); + } +} + +/* Please keep this in sync with debugCorrectEnds */ +// FIXME: member pointers have fallen out of favor and can be replaced with +// an alternative approach. +// makes all span ends agree with the segment's spans that define them +void SkCoincidentSpans::correctEnds() { + this->correctOneEnd(&SkCoincidentSpans::coinPtTStart, &SkCoincidentSpans::setCoinPtTStart); + this->correctOneEnd(&SkCoincidentSpans::coinPtTEnd, &SkCoincidentSpans::setCoinPtTEnd); + this->correctOneEnd(&SkCoincidentSpans::oppPtTStart, &SkCoincidentSpans::setOppPtTStart); + this->correctOneEnd(&SkCoincidentSpans::oppPtTEnd, &SkCoincidentSpans::setOppPtTEnd); +} + +/* Please keep this in sync with debugExpand */ +// expand the range by checking adjacent spans for coincidence +bool SkCoincidentSpans::expand() { + bool expanded = false; + const SkOpSegment* segment = coinPtTStart()->segment(); + const SkOpSegment* oppSegment = oppPtTStart()->segment(); + do { + const SkOpSpan* start = coinPtTStart()->span()->upCast(); + const SkOpSpan* prev = start->prev(); + const SkOpPtT* oppPtT; + if (!prev || !(oppPtT = prev->contains(oppSegment))) { + break; + } + double midT = (prev->t() + start->t()) / 2; + if (!segment->isClose(midT, oppSegment)) { + break; + } + setStarts(prev->ptT(), oppPtT); + expanded = true; + } while (true); + do { + const SkOpSpanBase* end = coinPtTEnd()->span(); + SkOpSpanBase* next = end->final() ? nullptr : end->upCast()->next(); + if (next && next->deleted()) { + break; + } + const SkOpPtT* oppPtT; + if (!next || !(oppPtT = next->contains(oppSegment))) { + break; + } + double midT = (end->t() + next->t()) / 2; + if (!segment->isClose(midT, oppSegment)) { + break; + } + setEnds(next->ptT(), oppPtT); + expanded = true; + } while (true); + return expanded; +} + +// increase the range of this span +bool SkCoincidentSpans::extend(const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, + const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd) { + bool result = false; + if (fCoinPtTStart->fT > coinPtTStart->fT || (this->flipped() + ? fOppPtTStart->fT < oppPtTStart->fT : fOppPtTStart->fT > oppPtTStart->fT)) { + this->setStarts(coinPtTStart, oppPtTStart); + result = true; + } + if (fCoinPtTEnd->fT < coinPtTEnd->fT || (this->flipped() + ? fOppPtTEnd->fT > oppPtTEnd->fT : fOppPtTEnd->fT < oppPtTEnd->fT)) { + this->setEnds(coinPtTEnd, oppPtTEnd); + result = true; + } + return result; +} + +// set the range of this span +void SkCoincidentSpans::set(SkCoincidentSpans* next, const SkOpPtT* coinPtTStart, + const SkOpPtT* coinPtTEnd, const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd) { + SkASSERT(SkOpCoincidence::Ordered(coinPtTStart, oppPtTStart)); + fNext = next; + this->setStarts(coinPtTStart, oppPtTStart); + this->setEnds(coinPtTEnd, oppPtTEnd); +} + +// returns true if both points are inside this +bool SkCoincidentSpans::contains(const SkOpPtT* s, const SkOpPtT* e) const { + if (s->fT > e->fT) { + using std::swap; + swap(s, e); + } + if (s->segment() == fCoinPtTStart->segment()) { + return fCoinPtTStart->fT <= s->fT && e->fT <= fCoinPtTEnd->fT; + } else { + SkASSERT(s->segment() == fOppPtTStart->segment()); + double oppTs = fOppPtTStart->fT; + double oppTe = fOppPtTEnd->fT; + if (oppTs > oppTe) { + using std::swap; + swap(oppTs, oppTe); + } + return oppTs <= s->fT && e->fT <= oppTe; + } +} + +// out of line since this function is referenced by address +const SkOpPtT* SkCoincidentSpans::oppPtTStart() const { + return fOppPtTStart; +} + +// out of line since this function is referenced by address +const SkOpPtT* SkCoincidentSpans::oppPtTEnd() const { + return fOppPtTEnd; +} + +// A coincident span is unordered if the pairs of points in the main and opposite curves' +// t values do not ascend or descend. For instance, if a tightly arced quadratic is +// coincident with another curve, it may intersect it out of order. +bool SkCoincidentSpans::ordered(bool* result) const { + const SkOpSpanBase* start = this->coinPtTStart()->span(); + const SkOpSpanBase* end = this->coinPtTEnd()->span(); + const SkOpSpanBase* next = start->upCast()->next(); + if (next == end) { + *result = true; + return true; + } + bool flipped = this->flipped(); + const SkOpSegment* oppSeg = this->oppPtTStart()->segment(); + double oppLastT = fOppPtTStart->fT; + do { + const SkOpPtT* opp = next->contains(oppSeg); + if (!opp) { +// SkOPOBJASSERT(start, 0); // may assert if coincident span isn't fully processed + return false; + } + if ((oppLastT > opp->fT) != flipped) { + *result = false; + return true; + } + oppLastT = opp->fT; + if (next == end) { + break; + } + if (!next->upCastable()) { + *result = false; + return true; + } + next = next->upCast()->next(); + } while (true); + *result = true; + return true; +} + +// if there is an existing pair that overlaps the addition, extend it +bool SkOpCoincidence::extend(const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, + const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd) { + SkCoincidentSpans* test = fHead; + if (!test) { + return false; + } + const SkOpSegment* coinSeg = coinPtTStart->segment(); + const SkOpSegment* oppSeg = oppPtTStart->segment(); + if (!Ordered(coinPtTStart, oppPtTStart)) { + using std::swap; + swap(coinSeg, oppSeg); + swap(coinPtTStart, oppPtTStart); + swap(coinPtTEnd, oppPtTEnd); + if (coinPtTStart->fT > coinPtTEnd->fT) { + swap(coinPtTStart, coinPtTEnd); + swap(oppPtTStart, oppPtTEnd); + } + } + double oppMinT = std::min(oppPtTStart->fT, oppPtTEnd->fT); + SkDEBUGCODE(double oppMaxT = std::max(oppPtTStart->fT, oppPtTEnd->fT)); + do { + if (coinSeg != test->coinPtTStart()->segment()) { + continue; + } + if (oppSeg != test->oppPtTStart()->segment()) { + continue; + } + double oTestMinT = std::min(test->oppPtTStart()->fT, test->oppPtTEnd()->fT); + double oTestMaxT = std::max(test->oppPtTStart()->fT, test->oppPtTEnd()->fT); + // if debug check triggers, caller failed to check if extended already exists + SkASSERT(test->coinPtTStart()->fT > coinPtTStart->fT + || coinPtTEnd->fT > test->coinPtTEnd()->fT + || oTestMinT > oppMinT || oppMaxT > oTestMaxT); + if ((test->coinPtTStart()->fT <= coinPtTEnd->fT + && coinPtTStart->fT <= test->coinPtTEnd()->fT) + || (oTestMinT <= oTestMaxT && oppMinT <= oTestMaxT)) { + test->extend(coinPtTStart, coinPtTEnd, oppPtTStart, oppPtTEnd); + return true; + } + } while ((test = test->next())); + return false; +} + +// verifies that the coincidence hasn't already been added +static void DebugCheckAdd(const SkCoincidentSpans* check, const SkOpPtT* coinPtTStart, + const SkOpPtT* coinPtTEnd, const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd) { +#if DEBUG_COINCIDENCE + while (check) { + SkASSERT(check->coinPtTStart() != coinPtTStart || check->coinPtTEnd() != coinPtTEnd + || check->oppPtTStart() != oppPtTStart || check->oppPtTEnd() != oppPtTEnd); + SkASSERT(check->coinPtTStart() != oppPtTStart || check->coinPtTEnd() != oppPtTEnd + || check->oppPtTStart() != coinPtTStart || check->oppPtTEnd() != coinPtTEnd); + check = check->next(); + } +#endif +} + +// adds a new coincident pair +void SkOpCoincidence::add(SkOpPtT* coinPtTStart, SkOpPtT* coinPtTEnd, SkOpPtT* oppPtTStart, + SkOpPtT* oppPtTEnd) { + // OPTIMIZE: caller should have already sorted + if (!Ordered(coinPtTStart, oppPtTStart)) { + if (oppPtTStart->fT < oppPtTEnd->fT) { + this->add(oppPtTStart, oppPtTEnd, coinPtTStart, coinPtTEnd); + } else { + this->add(oppPtTEnd, oppPtTStart, coinPtTEnd, coinPtTStart); + } + return; + } + SkASSERT(Ordered(coinPtTStart, oppPtTStart)); + // choose the ptT at the front of the list to track + coinPtTStart = coinPtTStart->span()->ptT(); + coinPtTEnd = coinPtTEnd->span()->ptT(); + oppPtTStart = oppPtTStart->span()->ptT(); + oppPtTEnd = oppPtTEnd->span()->ptT(); + SkOPASSERT(coinPtTStart->fT < coinPtTEnd->fT); + SkOPASSERT(oppPtTStart->fT != oppPtTEnd->fT); + SkOPASSERT(!coinPtTStart->deleted()); + SkOPASSERT(!coinPtTEnd->deleted()); + SkOPASSERT(!oppPtTStart->deleted()); + SkOPASSERT(!oppPtTEnd->deleted()); + DebugCheckAdd(fHead, coinPtTStart, coinPtTEnd, oppPtTStart, oppPtTEnd); + DebugCheckAdd(fTop, coinPtTStart, coinPtTEnd, oppPtTStart, oppPtTEnd); + SkCoincidentSpans* coinRec = this->globalState()->allocator()->make(); + coinRec->init(SkDEBUGCODE(fGlobalState)); + coinRec->set(this->fHead, coinPtTStart, coinPtTEnd, oppPtTStart, oppPtTEnd); + fHead = coinRec; +} + +// description below +bool SkOpCoincidence::addEndMovedSpans(const SkOpSpan* base, const SkOpSpanBase* testSpan) { + const SkOpPtT* testPtT = testSpan->ptT(); + const SkOpPtT* stopPtT = testPtT; + const SkOpSegment* baseSeg = base->segment(); + int escapeHatch = 100000; // this is 100 times larger than the debugLoopLimit test + while ((testPtT = testPtT->next()) != stopPtT) { + if (--escapeHatch <= 0) { + return false; // if triggered (likely by a fuzz-generated test) too complex to succeed + } + const SkOpSegment* testSeg = testPtT->segment(); + if (testPtT->deleted()) { + continue; + } + if (testSeg == baseSeg) { + continue; + } + if (testPtT->span()->ptT() != testPtT) { + continue; + } + if (this->contains(baseSeg, testSeg, testPtT->fT)) { + continue; + } + // intersect perp with base->ptT() with testPtT->segment() + SkDVector dxdy = baseSeg->dSlopeAtT(base->t()); + const SkPoint& pt = base->pt(); + SkDLine ray = {{{pt.fX, pt.fY}, {pt.fX + dxdy.fY, pt.fY - dxdy.fX}}}; + SkIntersections i SkDEBUGCODE((this->globalState())); + (*CurveIntersectRay[testSeg->verb()])(testSeg->pts(), testSeg->weight(), ray, &i); + for (int index = 0; index < i.used(); ++index) { + double t = i[0][index]; + if (!between(0, t, 1)) { + continue; + } + SkDPoint oppPt = i.pt(index); + if (!oppPt.approximatelyEqual(pt)) { + continue; + } + SkOpSegment* writableSeg = const_cast(testSeg); + SkOpPtT* oppStart = writableSeg->addT(t); + if (oppStart == testPtT) { + continue; + } + SkOpSpan* writableBase = const_cast(base); + oppStart->span()->addOpp(writableBase); + if (oppStart->deleted()) { + continue; + } + SkOpSegment* coinSeg = base->segment(); + SkOpSegment* oppSeg = oppStart->segment(); + double coinTs, coinTe, oppTs, oppTe; + if (Ordered(coinSeg, oppSeg)) { + coinTs = base->t(); + coinTe = testSpan->t(); + oppTs = oppStart->fT; + oppTe = testPtT->fT; + } else { + using std::swap; + swap(coinSeg, oppSeg); + coinTs = oppStart->fT; + coinTe = testPtT->fT; + oppTs = base->t(); + oppTe = testSpan->t(); + } + if (coinTs > coinTe) { + using std::swap; + swap(coinTs, coinTe); + swap(oppTs, oppTe); + } + bool added; + FAIL_IF(!this->addOrOverlap(coinSeg, oppSeg, coinTs, coinTe, oppTs, oppTe, &added)); + } + } + return true; +} + +// description below +bool SkOpCoincidence::addEndMovedSpans(const SkOpPtT* ptT) { + FAIL_IF(!ptT->span()->upCastable()); + const SkOpSpan* base = ptT->span()->upCast(); + const SkOpSpan* prev = base->prev(); + FAIL_IF(!prev); + if (!prev->isCanceled()) { + if (!this->addEndMovedSpans(base, base->prev())) { + return false; + } + } + if (!base->isCanceled()) { + if (!this->addEndMovedSpans(base, base->next())) { + return false; + } + } + return true; +} + +/* If A is coincident with B and B includes an endpoint, and A's matching point + is not the endpoint (i.e., there's an implied line connecting B-end and A) + then assume that the same implied line may intersect another curve close to B. + Since we only care about coincidence that was undetected, look at the + ptT list on B-segment adjacent to the B-end/A ptT loop (not in the loop, but + next door) and see if the A matching point is close enough to form another + coincident pair. If so, check for a new coincident span between B-end/A ptT loop + and the adjacent ptT loop. +*/ +bool SkOpCoincidence::addEndMovedSpans(DEBUG_COIN_DECLARE_ONLY_PARAMS()) { + DEBUG_SET_PHASE(); + SkCoincidentSpans* span = fHead; + if (!span) { + return true; + } + fTop = span; + fHead = nullptr; + do { + if (span->coinPtTStart()->fPt != span->oppPtTStart()->fPt) { + FAIL_IF(1 == span->coinPtTStart()->fT); + bool onEnd = span->coinPtTStart()->fT == 0; + bool oOnEnd = zero_or_one(span->oppPtTStart()->fT); + if (onEnd) { + if (!oOnEnd) { // if both are on end, any nearby intersect was already found + if (!this->addEndMovedSpans(span->oppPtTStart())) { + return false; + } + } + } else if (oOnEnd) { + if (!this->addEndMovedSpans(span->coinPtTStart())) { + return false; + } + } + } + if (span->coinPtTEnd()->fPt != span->oppPtTEnd()->fPt) { + bool onEnd = span->coinPtTEnd()->fT == 1; + bool oOnEnd = zero_or_one(span->oppPtTEnd()->fT); + if (onEnd) { + if (!oOnEnd) { + if (!this->addEndMovedSpans(span->oppPtTEnd())) { + return false; + } + } + } else if (oOnEnd) { + if (!this->addEndMovedSpans(span->coinPtTEnd())) { + return false; + } + } + } + } while ((span = span->next())); + this->restoreHead(); + return true; +} + +/* Please keep this in sync with debugAddExpanded */ +// for each coincident pair, match the spans +// if the spans don't match, add the missing pt to the segment and loop it in the opposite span +bool SkOpCoincidence::addExpanded(DEBUG_COIN_DECLARE_ONLY_PARAMS()) { + DEBUG_SET_PHASE(); + SkCoincidentSpans* coin = this->fHead; + if (!coin) { + return true; + } + do { + const SkOpPtT* startPtT = coin->coinPtTStart(); + const SkOpPtT* oStartPtT = coin->oppPtTStart(); + double priorT = startPtT->fT; + double oPriorT = oStartPtT->fT; + FAIL_IF(!startPtT->contains(oStartPtT)); + SkOPASSERT(coin->coinPtTEnd()->contains(coin->oppPtTEnd())); + const SkOpSpanBase* start = startPtT->span(); + const SkOpSpanBase* oStart = oStartPtT->span(); + const SkOpSpanBase* end = coin->coinPtTEnd()->span(); + const SkOpSpanBase* oEnd = coin->oppPtTEnd()->span(); + FAIL_IF(oEnd->deleted()); + FAIL_IF(!start->upCastable()); + const SkOpSpanBase* test = start->upCast()->next(); + FAIL_IF(!coin->flipped() && !oStart->upCastable()); + const SkOpSpanBase* oTest = coin->flipped() ? oStart->prev() : oStart->upCast()->next(); + FAIL_IF(!oTest); + SkOpSegment* seg = start->segment(); + SkOpSegment* oSeg = oStart->segment(); + while (test != end || oTest != oEnd) { + const SkOpPtT* containedOpp = test->ptT()->contains(oSeg); + const SkOpPtT* containedThis = oTest->ptT()->contains(seg); + if (!containedOpp || !containedThis) { + // choose the ends, or the first common pt-t list shared by both + double nextT, oNextT; + if (containedOpp) { + nextT = test->t(); + oNextT = containedOpp->fT; + } else if (containedThis) { + nextT = containedThis->fT; + oNextT = oTest->t(); + } else { + // iterate through until a pt-t list found that contains the other + const SkOpSpanBase* walk = test; + const SkOpPtT* walkOpp; + do { + FAIL_IF(!walk->upCastable()); + walk = walk->upCast()->next(); + } while (!(walkOpp = walk->ptT()->contains(oSeg)) + && walk != coin->coinPtTEnd()->span()); + FAIL_IF(!walkOpp); + nextT = walk->t(); + oNextT = walkOpp->fT; + } + // use t ranges to guess which one is missing + double startRange = nextT - priorT; + FAIL_IF(!startRange); + double startPart = (test->t() - priorT) / startRange; + double oStartRange = oNextT - oPriorT; + FAIL_IF(!oStartRange); + double oStartPart = (oTest->t() - oPriorT) / oStartRange; + FAIL_IF(startPart == oStartPart); + bool addToOpp = !containedOpp && !containedThis ? startPart < oStartPart + : !!containedThis; + bool startOver = false; + bool success = addToOpp ? oSeg->addExpanded( + oPriorT + oStartRange * startPart, test, &startOver) + : seg->addExpanded( + priorT + startRange * oStartPart, oTest, &startOver); + FAIL_IF(!success); + if (startOver) { + test = start; + oTest = oStart; + } + end = coin->coinPtTEnd()->span(); + oEnd = coin->oppPtTEnd()->span(); + } + if (test != end) { + FAIL_IF(!test->upCastable()); + priorT = test->t(); + test = test->upCast()->next(); + } + if (oTest != oEnd) { + oPriorT = oTest->t(); + if (coin->flipped()) { + oTest = oTest->prev(); + } else { + FAIL_IF(!oTest->upCastable()); + oTest = oTest->upCast()->next(); + } + FAIL_IF(!oTest); + } + + } + } while ((coin = coin->next())); + return true; +} + +// given a t span, map the same range on the coincident span +/* +the curves may not scale linearly, so interpolation may only happen within known points +remap over1s, over1e, cointPtTStart, coinPtTEnd to smallest range that captures over1s +then repeat to capture over1e +*/ +double SkOpCoincidence::TRange(const SkOpPtT* overS, double t, + const SkOpSegment* coinSeg SkDEBUGPARAMS(const SkOpPtT* overE)) { + const SkOpSpanBase* work = overS->span(); + const SkOpPtT* foundStart = nullptr; + const SkOpPtT* foundEnd = nullptr; + const SkOpPtT* coinStart = nullptr; + const SkOpPtT* coinEnd = nullptr; + do { + const SkOpPtT* contained = work->contains(coinSeg); + if (!contained) { + if (work->final()) { + break; + } + continue; + } + if (work->t() <= t) { + coinStart = contained; + foundStart = work->ptT(); + } + if (work->t() >= t) { + coinEnd = contained; + foundEnd = work->ptT(); + break; + } + SkASSERT(work->ptT() != overE); + } while ((work = work->upCast()->next())); + if (!coinStart || !coinEnd) { + return 1; + } + // while overS->fT <=t and overS contains coinSeg + double denom = foundEnd->fT - foundStart->fT; + double sRatio = denom ? (t - foundStart->fT) / denom : 1; + return coinStart->fT + (coinEnd->fT - coinStart->fT) * sRatio; +} + +// return true if span overlaps existing and needs to adjust the coincident list +bool SkOpCoincidence::checkOverlap(SkCoincidentSpans* check, + const SkOpSegment* coinSeg, const SkOpSegment* oppSeg, + double coinTs, double coinTe, double oppTs, double oppTe, + SkTDArray* overlaps) const { + if (!Ordered(coinSeg, oppSeg)) { + if (oppTs < oppTe) { + return this->checkOverlap(check, oppSeg, coinSeg, oppTs, oppTe, coinTs, coinTe, + overlaps); + } + return this->checkOverlap(check, oppSeg, coinSeg, oppTe, oppTs, coinTe, coinTs, overlaps); + } + bool swapOpp = oppTs > oppTe; + if (swapOpp) { + using std::swap; + swap(oppTs, oppTe); + } + do { + if (check->coinPtTStart()->segment() != coinSeg) { + continue; + } + if (check->oppPtTStart()->segment() != oppSeg) { + continue; + } + double checkTs = check->coinPtTStart()->fT; + double checkTe = check->coinPtTEnd()->fT; + bool coinOutside = coinTe < checkTs || coinTs > checkTe; + double oCheckTs = check->oppPtTStart()->fT; + double oCheckTe = check->oppPtTEnd()->fT; + if (swapOpp) { + if (oCheckTs <= oCheckTe) { + return false; + } + using std::swap; + swap(oCheckTs, oCheckTe); + } + bool oppOutside = oppTe < oCheckTs || oppTs > oCheckTe; + if (coinOutside && oppOutside) { + continue; + } + bool coinInside = coinTe <= checkTe && coinTs >= checkTs; + bool oppInside = oppTe <= oCheckTe && oppTs >= oCheckTs; + if (coinInside && oppInside) { // already included, do nothing + return false; + } + *overlaps->append() = check; // partial overlap, extend existing entry + } while ((check = check->next())); + return true; +} + +/* Please keep this in sync with debugAddIfMissing() */ +// note that over1s, over1e, over2s, over2e are ordered +bool SkOpCoincidence::addIfMissing(const SkOpPtT* over1s, const SkOpPtT* over2s, + double tStart, double tEnd, SkOpSegment* coinSeg, SkOpSegment* oppSeg, bool* added + SkDEBUGPARAMS(const SkOpPtT* over1e) SkDEBUGPARAMS(const SkOpPtT* over2e)) { + SkASSERT(tStart < tEnd); + SkASSERT(over1s->fT < over1e->fT); + SkASSERT(between(over1s->fT, tStart, over1e->fT)); + SkASSERT(between(over1s->fT, tEnd, over1e->fT)); + SkASSERT(over2s->fT < over2e->fT); + SkASSERT(between(over2s->fT, tStart, over2e->fT)); + SkASSERT(between(over2s->fT, tEnd, over2e->fT)); + SkASSERT(over1s->segment() == over1e->segment()); + SkASSERT(over2s->segment() == over2e->segment()); + SkASSERT(over1s->segment() == over2s->segment()); + SkASSERT(over1s->segment() != coinSeg); + SkASSERT(over1s->segment() != oppSeg); + SkASSERT(coinSeg != oppSeg); + double coinTs, coinTe, oppTs, oppTe; + coinTs = TRange(over1s, tStart, coinSeg SkDEBUGPARAMS(over1e)); + coinTe = TRange(over1s, tEnd, coinSeg SkDEBUGPARAMS(over1e)); + SkOpSpanBase::Collapsed result = coinSeg->collapsed(coinTs, coinTe); + if (SkOpSpanBase::Collapsed::kNo != result) { + return SkOpSpanBase::Collapsed::kYes == result; + } + oppTs = TRange(over2s, tStart, oppSeg SkDEBUGPARAMS(over2e)); + oppTe = TRange(over2s, tEnd, oppSeg SkDEBUGPARAMS(over2e)); + result = oppSeg->collapsed(oppTs, oppTe); + if (SkOpSpanBase::Collapsed::kNo != result) { + return SkOpSpanBase::Collapsed::kYes == result; + } + if (coinTs > coinTe) { + using std::swap; + swap(coinTs, coinTe); + swap(oppTs, oppTe); + } + (void) this->addOrOverlap(coinSeg, oppSeg, coinTs, coinTe, oppTs, oppTe, added); + return true; +} + +/* Please keep this in sync with debugAddOrOverlap() */ +// If this is called by addEndMovedSpans(), a returned false propogates out to an abort. +// If this is called by AddIfMissing(), a returned false indicates there was nothing to add +bool SkOpCoincidence::addOrOverlap(SkOpSegment* coinSeg, SkOpSegment* oppSeg, + double coinTs, double coinTe, double oppTs, double oppTe, bool* added) { + SkTDArray overlaps; + FAIL_IF(!fTop); + if (!this->checkOverlap(fTop, coinSeg, oppSeg, coinTs, coinTe, oppTs, oppTe, &overlaps)) { + return true; + } + if (fHead && !this->checkOverlap(fHead, coinSeg, oppSeg, coinTs, + coinTe, oppTs, oppTe, &overlaps)) { + return true; + } + SkCoincidentSpans* overlap = !overlaps.empty() ? overlaps[0] : nullptr; + for (int index = 1; index < overlaps.size(); ++index) { // combine overlaps before continuing + SkCoincidentSpans* test = overlaps[index]; + if (overlap->coinPtTStart()->fT > test->coinPtTStart()->fT) { + overlap->setCoinPtTStart(test->coinPtTStart()); + } + if (overlap->coinPtTEnd()->fT < test->coinPtTEnd()->fT) { + overlap->setCoinPtTEnd(test->coinPtTEnd()); + } + if (overlap->flipped() + ? overlap->oppPtTStart()->fT < test->oppPtTStart()->fT + : overlap->oppPtTStart()->fT > test->oppPtTStart()->fT) { + overlap->setOppPtTStart(test->oppPtTStart()); + } + if (overlap->flipped() + ? overlap->oppPtTEnd()->fT > test->oppPtTEnd()->fT + : overlap->oppPtTEnd()->fT < test->oppPtTEnd()->fT) { + overlap->setOppPtTEnd(test->oppPtTEnd()); + } + if (!fHead || !this->release(fHead, test)) { + SkAssertResult(this->release(fTop, test)); + } + } + const SkOpPtT* cs = coinSeg->existing(coinTs, oppSeg); + const SkOpPtT* ce = coinSeg->existing(coinTe, oppSeg); + if (overlap && cs && ce && overlap->contains(cs, ce)) { + return true; + } + FAIL_IF(cs == ce && cs); + const SkOpPtT* os = oppSeg->existing(oppTs, coinSeg); + const SkOpPtT* oe = oppSeg->existing(oppTe, coinSeg); + if (overlap && os && oe && overlap->contains(os, oe)) { + return true; + } + FAIL_IF(cs && cs->deleted()); + FAIL_IF(os && os->deleted()); + FAIL_IF(ce && ce->deleted()); + FAIL_IF(oe && oe->deleted()); + const SkOpPtT* csExisting = !cs ? coinSeg->existing(coinTs, nullptr) : nullptr; + const SkOpPtT* ceExisting = !ce ? coinSeg->existing(coinTe, nullptr) : nullptr; + FAIL_IF(csExisting && csExisting == ceExisting); +// FAIL_IF(csExisting && (csExisting == ce || +// csExisting->contains(ceExisting ? ceExisting : ce))); + FAIL_IF(ceExisting && (ceExisting == cs || + ceExisting->contains(csExisting ? csExisting : cs))); + const SkOpPtT* osExisting = !os ? oppSeg->existing(oppTs, nullptr) : nullptr; + const SkOpPtT* oeExisting = !oe ? oppSeg->existing(oppTe, nullptr) : nullptr; + FAIL_IF(osExisting && osExisting == oeExisting); + FAIL_IF(osExisting && (osExisting == oe || + osExisting->contains(oeExisting ? oeExisting : oe))); + FAIL_IF(oeExisting && (oeExisting == os || + oeExisting->contains(osExisting ? osExisting : os))); + // extra line in debug code + this->debugValidate(); + if (!cs || !os) { + SkOpPtT* csWritable = cs ? const_cast(cs) + : coinSeg->addT(coinTs); + if (csWritable == ce) { + return true; + } + SkOpPtT* osWritable = os ? const_cast(os) + : oppSeg->addT(oppTs); + FAIL_IF(!csWritable || !osWritable); + csWritable->span()->addOpp(osWritable->span()); + cs = csWritable; + os = osWritable->active(); + FAIL_IF(!os); + FAIL_IF((ce && ce->deleted()) || (oe && oe->deleted())); + } + if (!ce || !oe) { + SkOpPtT* ceWritable = ce ? const_cast(ce) + : coinSeg->addT(coinTe); + SkOpPtT* oeWritable = oe ? const_cast(oe) + : oppSeg->addT(oppTe); + FAIL_IF(!ceWritable->span()->addOpp(oeWritable->span())); + ce = ceWritable; + oe = oeWritable; + } + this->debugValidate(); + FAIL_IF(cs->deleted()); + FAIL_IF(os->deleted()); + FAIL_IF(ce->deleted()); + FAIL_IF(oe->deleted()); + FAIL_IF(cs->contains(ce) || os->contains(oe)); + bool result = true; + if (overlap) { + if (overlap->coinPtTStart()->segment() == coinSeg) { + result = overlap->extend(cs, ce, os, oe); + } else { + if (os->fT > oe->fT) { + using std::swap; + swap(cs, ce); + swap(os, oe); + } + result = overlap->extend(os, oe, cs, ce); + } +#if DEBUG_COINCIDENCE_VERBOSE + if (result) { + overlaps[0]->debugShow(); + } +#endif + } else { + this->add(cs, ce, os, oe); +#if DEBUG_COINCIDENCE_VERBOSE + fHead->debugShow(); +#endif + } + this->debugValidate(); + if (result) { + *added = true; + } + return true; +} + +// Please keep this in sync with debugAddMissing() +/* detects overlaps of different coincident runs on same segment */ +/* does not detect overlaps for pairs without any segments in common */ +// returns true if caller should loop again +bool SkOpCoincidence::addMissing(bool* added DEBUG_COIN_DECLARE_PARAMS()) { + SkCoincidentSpans* outer = fHead; + *added = false; + if (!outer) { + return true; + } + fTop = outer; + fHead = nullptr; + do { + // addifmissing can modify the list that this is walking + // save head so that walker can iterate over old data unperturbed + // addifmissing adds to head freely then add saved head in the end + const SkOpPtT* ocs = outer->coinPtTStart(); + FAIL_IF(ocs->deleted()); + const SkOpSegment* outerCoin = ocs->segment(); + FAIL_IF(outerCoin->done()); + const SkOpPtT* oos = outer->oppPtTStart(); + if (oos->deleted()) { + return true; + } + const SkOpSegment* outerOpp = oos->segment(); + SkOPASSERT(!outerOpp->done()); + SkOpSegment* outerCoinWritable = const_cast(outerCoin); + SkOpSegment* outerOppWritable = const_cast(outerOpp); + SkCoincidentSpans* inner = outer; +#ifdef SK_BUILD_FOR_FUZZER + int safetyNet = 1000; +#endif + while ((inner = inner->next())) { +#ifdef SK_BUILD_FOR_FUZZER + if (!--safetyNet) { + return false; + } +#endif + this->debugValidate(); + double overS, overE; + const SkOpPtT* ics = inner->coinPtTStart(); + FAIL_IF(ics->deleted()); + const SkOpSegment* innerCoin = ics->segment(); + FAIL_IF(innerCoin->done()); + const SkOpPtT* ios = inner->oppPtTStart(); + FAIL_IF(ios->deleted()); + const SkOpSegment* innerOpp = ios->segment(); + SkOPASSERT(!innerOpp->done()); + SkOpSegment* innerCoinWritable = const_cast(innerCoin); + SkOpSegment* innerOppWritable = const_cast(innerOpp); + if (outerCoin == innerCoin) { + const SkOpPtT* oce = outer->coinPtTEnd(); + if (oce->deleted()) { + return true; + } + const SkOpPtT* ice = inner->coinPtTEnd(); + FAIL_IF(ice->deleted()); + if (outerOpp != innerOpp && this->overlap(ocs, oce, ics, ice, &overS, &overE)) { + FAIL_IF(!this->addIfMissing(ocs->starter(oce), ics->starter(ice), + overS, overE, outerOppWritable, innerOppWritable, added + SkDEBUGPARAMS(ocs->debugEnder(oce)) + SkDEBUGPARAMS(ics->debugEnder(ice)))); + } + } else if (outerCoin == innerOpp) { + const SkOpPtT* oce = outer->coinPtTEnd(); + FAIL_IF(oce->deleted()); + const SkOpPtT* ioe = inner->oppPtTEnd(); + FAIL_IF(ioe->deleted()); + if (outerOpp != innerCoin && this->overlap(ocs, oce, ios, ioe, &overS, &overE)) { + FAIL_IF(!this->addIfMissing(ocs->starter(oce), ios->starter(ioe), + overS, overE, outerOppWritable, innerCoinWritable, added + SkDEBUGPARAMS(ocs->debugEnder(oce)) + SkDEBUGPARAMS(ios->debugEnder(ioe)))); + } + } else if (outerOpp == innerCoin) { + const SkOpPtT* ooe = outer->oppPtTEnd(); + FAIL_IF(ooe->deleted()); + const SkOpPtT* ice = inner->coinPtTEnd(); + FAIL_IF(ice->deleted()); + SkASSERT(outerCoin != innerOpp); + if (this->overlap(oos, ooe, ics, ice, &overS, &overE)) { + FAIL_IF(!this->addIfMissing(oos->starter(ooe), ics->starter(ice), + overS, overE, outerCoinWritable, innerOppWritable, added + SkDEBUGPARAMS(oos->debugEnder(ooe)) + SkDEBUGPARAMS(ics->debugEnder(ice)))); + } + } else if (outerOpp == innerOpp) { + const SkOpPtT* ooe = outer->oppPtTEnd(); + FAIL_IF(ooe->deleted()); + const SkOpPtT* ioe = inner->oppPtTEnd(); + if (ioe->deleted()) { + return true; + } + SkASSERT(outerCoin != innerCoin); + if (this->overlap(oos, ooe, ios, ioe, &overS, &overE)) { + FAIL_IF(!this->addIfMissing(oos->starter(ooe), ios->starter(ioe), + overS, overE, outerCoinWritable, innerCoinWritable, added + SkDEBUGPARAMS(oos->debugEnder(ooe)) + SkDEBUGPARAMS(ios->debugEnder(ioe)))); + } + } + this->debugValidate(); + } + } while ((outer = outer->next())); + this->restoreHead(); + return true; +} + +bool SkOpCoincidence::addOverlap(const SkOpSegment* seg1, const SkOpSegment* seg1o, + const SkOpSegment* seg2, const SkOpSegment* seg2o, + const SkOpPtT* overS, const SkOpPtT* overE) { + const SkOpPtT* s1 = overS->find(seg1); + const SkOpPtT* e1 = overE->find(seg1); + FAIL_IF(!s1); + FAIL_IF(!e1); + if (!s1->starter(e1)->span()->upCast()->windValue()) { + s1 = overS->find(seg1o); + e1 = overE->find(seg1o); + FAIL_IF(!s1); + FAIL_IF(!e1); + if (!s1->starter(e1)->span()->upCast()->windValue()) { + return true; + } + } + const SkOpPtT* s2 = overS->find(seg2); + const SkOpPtT* e2 = overE->find(seg2); + FAIL_IF(!s2); + FAIL_IF(!e2); + if (!s2->starter(e2)->span()->upCast()->windValue()) { + s2 = overS->find(seg2o); + e2 = overE->find(seg2o); + FAIL_IF(!s2); + FAIL_IF(!e2); + if (!s2->starter(e2)->span()->upCast()->windValue()) { + return true; + } + } + if (s1->segment() == s2->segment()) { + return true; + } + if (s1->fT > e1->fT) { + using std::swap; + swap(s1, e1); + swap(s2, e2); + } + this->add(s1, e1, s2, e2); + return true; +} + +bool SkOpCoincidence::contains(const SkOpSegment* seg, const SkOpSegment* opp, double oppT) const { + if (this->contains(fHead, seg, opp, oppT)) { + return true; + } + if (this->contains(fTop, seg, opp, oppT)) { + return true; + } + return false; +} + +bool SkOpCoincidence::contains(const SkCoincidentSpans* coin, const SkOpSegment* seg, + const SkOpSegment* opp, double oppT) const { + if (!coin) { + return false; + } + do { + if (coin->coinPtTStart()->segment() == seg && coin->oppPtTStart()->segment() == opp + && between(coin->oppPtTStart()->fT, oppT, coin->oppPtTEnd()->fT)) { + return true; + } + if (coin->oppPtTStart()->segment() == seg && coin->coinPtTStart()->segment() == opp + && between(coin->coinPtTStart()->fT, oppT, coin->coinPtTEnd()->fT)) { + return true; + } + } while ((coin = coin->next())); + return false; +} + +bool SkOpCoincidence::contains(const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, + const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd) const { + const SkCoincidentSpans* test = fHead; + if (!test) { + return false; + } + const SkOpSegment* coinSeg = coinPtTStart->segment(); + const SkOpSegment* oppSeg = oppPtTStart->segment(); + if (!Ordered(coinPtTStart, oppPtTStart)) { + using std::swap; + swap(coinSeg, oppSeg); + swap(coinPtTStart, oppPtTStart); + swap(coinPtTEnd, oppPtTEnd); + if (coinPtTStart->fT > coinPtTEnd->fT) { + swap(coinPtTStart, coinPtTEnd); + swap(oppPtTStart, oppPtTEnd); + } + } + double oppMinT = std::min(oppPtTStart->fT, oppPtTEnd->fT); + double oppMaxT = std::max(oppPtTStart->fT, oppPtTEnd->fT); + do { + if (coinSeg != test->coinPtTStart()->segment()) { + continue; + } + if (coinPtTStart->fT < test->coinPtTStart()->fT) { + continue; + } + if (coinPtTEnd->fT > test->coinPtTEnd()->fT) { + continue; + } + if (oppSeg != test->oppPtTStart()->segment()) { + continue; + } + if (oppMinT < std::min(test->oppPtTStart()->fT, test->oppPtTEnd()->fT)) { + continue; + } + if (oppMaxT > std::max(test->oppPtTStart()->fT, test->oppPtTEnd()->fT)) { + continue; + } + return true; + } while ((test = test->next())); + return false; +} + +void SkOpCoincidence::correctEnds(DEBUG_COIN_DECLARE_ONLY_PARAMS()) { + DEBUG_SET_PHASE(); + SkCoincidentSpans* coin = fHead; + if (!coin) { + return; + } + do { + coin->correctEnds(); + } while ((coin = coin->next())); +} + +// walk span sets in parallel, moving winding from one to the other +bool SkOpCoincidence::apply(DEBUG_COIN_DECLARE_ONLY_PARAMS()) { + DEBUG_SET_PHASE(); + SkCoincidentSpans* coin = fHead; + if (!coin) { + return true; + } + do { + SkOpSpanBase* startSpan = coin->coinPtTStartWritable()->span(); + FAIL_IF(!startSpan->upCastable()); + SkOpSpan* start = startSpan->upCast(); + if (start->deleted()) { + continue; + } + const SkOpSpanBase* end = coin->coinPtTEnd()->span(); + FAIL_IF(start != start->starter(end)); + bool flipped = coin->flipped(); + SkOpSpanBase* oStartBase = (flipped ? coin->oppPtTEndWritable() + : coin->oppPtTStartWritable())->span(); + FAIL_IF(!oStartBase->upCastable()); + SkOpSpan* oStart = oStartBase->upCast(); + if (oStart->deleted()) { + continue; + } + const SkOpSpanBase* oEnd = (flipped ? coin->oppPtTStart() : coin->oppPtTEnd())->span(); + SkASSERT(oStart == oStart->starter(oEnd)); + SkOpSegment* segment = start->segment(); + SkOpSegment* oSegment = oStart->segment(); + bool operandSwap = segment->operand() != oSegment->operand(); + if (flipped) { + if (oEnd->deleted()) { + continue; + } + do { + SkOpSpanBase* oNext = oStart->next(); + if (oNext == oEnd) { + break; + } + FAIL_IF(!oNext->upCastable()); + oStart = oNext->upCast(); + } while (true); + } + do { + int windValue = start->windValue(); + int oppValue = start->oppValue(); + int oWindValue = oStart->windValue(); + int oOppValue = oStart->oppValue(); + // winding values are added or subtracted depending on direction and wind type + // same or opposite values are summed depending on the operand value + int windDiff = operandSwap ? oOppValue : oWindValue; + int oWindDiff = operandSwap ? oppValue : windValue; + if (!flipped) { + windDiff = -windDiff; + oWindDiff = -oWindDiff; + } + bool addToStart = windValue && (windValue > windDiff || (windValue == windDiff + && oWindValue <= oWindDiff)); + if (addToStart ? start->done() : oStart->done()) { + addToStart ^= true; + } + if (addToStart) { + if (operandSwap) { + using std::swap; + swap(oWindValue, oOppValue); + } + if (flipped) { + windValue -= oWindValue; + oppValue -= oOppValue; + } else { + windValue += oWindValue; + oppValue += oOppValue; + } + if (segment->isXor()) { + windValue &= 1; + } + if (segment->oppXor()) { + oppValue &= 1; + } + oWindValue = oOppValue = 0; + } else { + if (operandSwap) { + using std::swap; + swap(windValue, oppValue); + } + if (flipped) { + oWindValue -= windValue; + oOppValue -= oppValue; + } else { + oWindValue += windValue; + oOppValue += oppValue; + } + if (oSegment->isXor()) { + oWindValue &= 1; + } + if (oSegment->oppXor()) { + oOppValue &= 1; + } + windValue = oppValue = 0; + } +#if 0 && DEBUG_COINCIDENCE + SkDebugf("seg=%d span=%d windValue=%d oppValue=%d\n", segment->debugID(), + start->debugID(), windValue, oppValue); + SkDebugf("seg=%d span=%d windValue=%d oppValue=%d\n", oSegment->debugID(), + oStart->debugID(), oWindValue, oOppValue); +#endif + FAIL_IF(windValue <= -1); + start->setWindValue(windValue); + start->setOppValue(oppValue); + FAIL_IF(oWindValue <= -1); + oStart->setWindValue(oWindValue); + oStart->setOppValue(oOppValue); + if (!windValue && !oppValue) { + segment->markDone(start); + } + if (!oWindValue && !oOppValue) { + oSegment->markDone(oStart); + } + SkOpSpanBase* next = start->next(); + SkOpSpanBase* oNext = flipped ? oStart->prev() : oStart->next(); + if (next == end) { + break; + } + FAIL_IF(!next->upCastable()); + start = next->upCast(); + // if the opposite ran out too soon, just reuse the last span + if (!oNext || !oNext->upCastable()) { + oNext = oStart; + } + oStart = oNext->upCast(); + } while (true); + } while ((coin = coin->next())); + return true; +} + +// Please keep this in sync with debugRelease() +bool SkOpCoincidence::release(SkCoincidentSpans* coin, SkCoincidentSpans* remove) { + SkCoincidentSpans* head = coin; + SkCoincidentSpans* prev = nullptr; + SkCoincidentSpans* next; + do { + next = coin->next(); + if (coin == remove) { + if (prev) { + prev->setNext(next); + } else if (head == fHead) { + fHead = next; + } else { + fTop = next; + } + break; + } + prev = coin; + } while ((coin = next)); + return coin != nullptr; +} + +void SkOpCoincidence::releaseDeleted(SkCoincidentSpans* coin) { + if (!coin) { + return; + } + SkCoincidentSpans* head = coin; + SkCoincidentSpans* prev = nullptr; + SkCoincidentSpans* next; + do { + next = coin->next(); + if (coin->coinPtTStart()->deleted()) { + SkOPASSERT(coin->flipped() ? coin->oppPtTEnd()->deleted() : + coin->oppPtTStart()->deleted()); + if (prev) { + prev->setNext(next); + } else if (head == fHead) { + fHead = next; + } else { + fTop = next; + } + } else { + SkOPASSERT(coin->flipped() ? !coin->oppPtTEnd()->deleted() : + !coin->oppPtTStart()->deleted()); + prev = coin; + } + } while ((coin = next)); +} + +void SkOpCoincidence::releaseDeleted() { + this->releaseDeleted(fHead); + this->releaseDeleted(fTop); +} + +void SkOpCoincidence::restoreHead() { + SkCoincidentSpans** headPtr = &fHead; + while (*headPtr) { + headPtr = (*headPtr)->nextPtr(); + } + *headPtr = fTop; + fTop = nullptr; + // segments may have collapsed in the meantime; remove empty referenced segments + headPtr = &fHead; + while (*headPtr) { + SkCoincidentSpans* test = *headPtr; + if (test->coinPtTStart()->segment()->done() || test->oppPtTStart()->segment()->done()) { + *headPtr = test->next(); + continue; + } + headPtr = (*headPtr)->nextPtr(); + } +} + +// Please keep this in sync with debugExpand() +// expand the range by checking adjacent spans for coincidence +bool SkOpCoincidence::expand(DEBUG_COIN_DECLARE_ONLY_PARAMS()) { + DEBUG_SET_PHASE(); + SkCoincidentSpans* coin = fHead; + if (!coin) { + return false; + } + bool expanded = false; + do { + if (coin->expand()) { + // check to see if multiple spans expanded so they are now identical + SkCoincidentSpans* test = fHead; + do { + if (coin == test) { + continue; + } + if (coin->coinPtTStart() == test->coinPtTStart() + && coin->oppPtTStart() == test->oppPtTStart()) { + this->release(fHead, test); + break; + } + } while ((test = test->next())); + expanded = true; + } + } while ((coin = coin->next())); + return expanded; +} + +bool SkOpCoincidence::findOverlaps(SkOpCoincidence* overlaps DEBUG_COIN_DECLARE_PARAMS()) const { + DEBUG_SET_PHASE(); + overlaps->fHead = overlaps->fTop = nullptr; + SkCoincidentSpans* outer = fHead; + while (outer) { + const SkOpSegment* outerCoin = outer->coinPtTStart()->segment(); + const SkOpSegment* outerOpp = outer->oppPtTStart()->segment(); + SkCoincidentSpans* inner = outer; + while ((inner = inner->next())) { + const SkOpSegment* innerCoin = inner->coinPtTStart()->segment(); + if (outerCoin == innerCoin) { + continue; // both winners are the same segment, so there's no additional overlap + } + const SkOpSegment* innerOpp = inner->oppPtTStart()->segment(); + const SkOpPtT* overlapS; + const SkOpPtT* overlapE; + if ((outerOpp == innerCoin && SkOpPtT::Overlaps(outer->oppPtTStart(), + outer->oppPtTEnd(),inner->coinPtTStart(), inner->coinPtTEnd(), &overlapS, + &overlapE)) + || (outerCoin == innerOpp && SkOpPtT::Overlaps(outer->coinPtTStart(), + outer->coinPtTEnd(), inner->oppPtTStart(), inner->oppPtTEnd(), + &overlapS, &overlapE)) + || (outerOpp == innerOpp && SkOpPtT::Overlaps(outer->oppPtTStart(), + outer->oppPtTEnd(), inner->oppPtTStart(), inner->oppPtTEnd(), + &overlapS, &overlapE))) { + if (!overlaps->addOverlap(outerCoin, outerOpp, innerCoin, innerOpp, + overlapS, overlapE)) { + return false; + } + } + } + outer = outer->next(); + } + return true; +} + +void SkOpCoincidence::fixUp(SkOpPtT* deleted, const SkOpPtT* kept) { + SkOPASSERT(deleted != kept); + if (fHead) { + this->fixUp(fHead, deleted, kept); + } + if (fTop) { + this->fixUp(fTop, deleted, kept); + } +} + +void SkOpCoincidence::fixUp(SkCoincidentSpans* coin, SkOpPtT* deleted, const SkOpPtT* kept) { + SkCoincidentSpans* head = coin; + do { + if (coin->coinPtTStart() == deleted) { + if (coin->coinPtTEnd()->span() == kept->span()) { + this->release(head, coin); + continue; + } + coin->setCoinPtTStart(kept); + } + if (coin->coinPtTEnd() == deleted) { + if (coin->coinPtTStart()->span() == kept->span()) { + this->release(head, coin); + continue; + } + coin->setCoinPtTEnd(kept); + } + if (coin->oppPtTStart() == deleted) { + if (coin->oppPtTEnd()->span() == kept->span()) { + this->release(head, coin); + continue; + } + coin->setOppPtTStart(kept); + } + if (coin->oppPtTEnd() == deleted) { + if (coin->oppPtTStart()->span() == kept->span()) { + this->release(head, coin); + continue; + } + coin->setOppPtTEnd(kept); + } + } while ((coin = coin->next())); +} + +// Please keep this in sync with debugMark() +/* this sets up the coincidence links in the segments when the coincidence crosses multiple spans */ +bool SkOpCoincidence::mark(DEBUG_COIN_DECLARE_ONLY_PARAMS()) { + DEBUG_SET_PHASE(); + SkCoincidentSpans* coin = fHead; + if (!coin) { + return true; + } + do { + SkOpSpanBase* startBase = coin->coinPtTStartWritable()->span(); + FAIL_IF(!startBase->upCastable()); + SkOpSpan* start = startBase->upCast(); + FAIL_IF(start->deleted()); + SkOpSpanBase* end = coin->coinPtTEndWritable()->span(); + SkOPASSERT(!end->deleted()); + SkOpSpanBase* oStart = coin->oppPtTStartWritable()->span(); + SkOPASSERT(!oStart->deleted()); + SkOpSpanBase* oEnd = coin->oppPtTEndWritable()->span(); + FAIL_IF(oEnd->deleted()); + bool flipped = coin->flipped(); + if (flipped) { + using std::swap; + swap(oStart, oEnd); + } + /* coin and opp spans may not match up. Mark the ends, and then let the interior + get marked as many times as the spans allow */ + FAIL_IF(!oStart->upCastable()); + start->insertCoincidence(oStart->upCast()); + end->insertCoinEnd(oEnd); + const SkOpSegment* segment = start->segment(); + const SkOpSegment* oSegment = oStart->segment(); + SkOpSpanBase* next = start; + SkOpSpanBase* oNext = oStart; + bool ordered; + FAIL_IF(!coin->ordered(&ordered)); + while ((next = next->upCast()->next()) != end) { + FAIL_IF(!next->upCastable()); + FAIL_IF(!next->upCast()->insertCoincidence(oSegment, flipped, ordered)); + } + while ((oNext = oNext->upCast()->next()) != oEnd) { + FAIL_IF(!oNext->upCastable()); + FAIL_IF(!oNext->upCast()->insertCoincidence(segment, flipped, ordered)); + } + } while ((coin = coin->next())); + return true; +} + +// Please keep in sync with debugMarkCollapsed() +void SkOpCoincidence::markCollapsed(SkCoincidentSpans* coin, SkOpPtT* test) { + SkCoincidentSpans* head = coin; + while (coin) { + if (coin->collapsed(test)) { + if (zero_or_one(coin->coinPtTStart()->fT) && zero_or_one(coin->coinPtTEnd()->fT)) { + coin->coinPtTStartWritable()->segment()->markAllDone(); + } + if (zero_or_one(coin->oppPtTStart()->fT) && zero_or_one(coin->oppPtTEnd()->fT)) { + coin->oppPtTStartWritable()->segment()->markAllDone(); + } + this->release(head, coin); + } + coin = coin->next(); + } +} + +// Please keep in sync with debugMarkCollapsed() +void SkOpCoincidence::markCollapsed(SkOpPtT* test) { + markCollapsed(fHead, test); + markCollapsed(fTop, test); +} + +bool SkOpCoincidence::Ordered(const SkOpSegment* coinSeg, const SkOpSegment* oppSeg) { + if (coinSeg->verb() < oppSeg->verb()) { + return true; + } + if (coinSeg->verb() > oppSeg->verb()) { + return false; + } + int count = (SkPathOpsVerbToPoints(coinSeg->verb()) + 1) * 2; + const SkScalar* cPt = &coinSeg->pts()[0].fX; + const SkScalar* oPt = &oppSeg->pts()[0].fX; + for (int index = 0; index < count; ++index) { + if (*cPt < *oPt) { + return true; + } + if (*cPt > *oPt) { + return false; + } + ++cPt; + ++oPt; + } + return true; +} + +bool SkOpCoincidence::overlap(const SkOpPtT* coin1s, const SkOpPtT* coin1e, + const SkOpPtT* coin2s, const SkOpPtT* coin2e, double* overS, double* overE) const { + SkASSERT(coin1s->segment() == coin2s->segment()); + *overS = std::max(std::min(coin1s->fT, coin1e->fT), std::min(coin2s->fT, coin2e->fT)); + *overE = std::min(std::max(coin1s->fT, coin1e->fT), std::max(coin2s->fT, coin2e->fT)); + return *overS < *overE; +} + +// Commented-out lines keep this in sync with debugRelease() +void SkOpCoincidence::release(const SkOpSegment* deleted) { + SkCoincidentSpans* coin = fHead; + if (!coin) { + return; + } + do { + if (coin->coinPtTStart()->segment() == deleted + || coin->coinPtTEnd()->segment() == deleted + || coin->oppPtTStart()->segment() == deleted + || coin->oppPtTEnd()->segment() == deleted) { + this->release(fHead, coin); + } + } while ((coin = coin->next())); +} diff --git a/gfx/skia/skia/src/pathops/SkOpCoincidence.h b/gfx/skia/skia/src/pathops/SkOpCoincidence.h new file mode 100644 index 0000000000..7db9369050 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpCoincidence.h @@ -0,0 +1,307 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkOpCoincidence_DEFINED +#define SkOpCoincidence_DEFINED + +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsTypes.h" + +class SkOpAngle; +class SkOpContour; +class SkOpSegment; + +template class SkTDArray; + +class SkCoincidentSpans { +public: + const SkOpPtT* coinPtTEnd() const; + const SkOpPtT* coinPtTStart() const; + + // These return non-const pointers so that, as copies, they can be added + // to a new span pair + SkOpPtT* coinPtTEndWritable() const { return const_cast(fCoinPtTEnd); } + SkOpPtT* coinPtTStartWritable() const { return const_cast(fCoinPtTStart); } + + bool collapsed(const SkOpPtT* ) const; + bool contains(const SkOpPtT* s, const SkOpPtT* e) const; + void correctEnds(); + void correctOneEnd(const SkOpPtT* (SkCoincidentSpans::* getEnd)() const, + void (SkCoincidentSpans::* setEnd)(const SkOpPtT* ptT) ); + +#if DEBUG_COIN + void debugCorrectEnds(SkPathOpsDebug::GlitchLog* log) const; + void debugCorrectOneEnd(SkPathOpsDebug::GlitchLog* log, + const SkOpPtT* (SkCoincidentSpans::* getEnd)() const, + void (SkCoincidentSpans::* setEnd)(const SkOpPtT* ptT) const) const; + bool debugExpand(SkPathOpsDebug::GlitchLog* log) const; +#endif + + const char* debugID() const { +#if DEBUG_COIN + return fGlobalState->debugCoinDictEntry().fFunctionName; +#else + return nullptr; +#endif + } + + void debugShow() const; +#ifdef SK_DEBUG + void debugStartCheck(const SkOpSpanBase* outer, const SkOpSpanBase* over, + const SkOpGlobalState* debugState) const; +#endif + void dump() const; + bool expand(); + bool extend(const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, + const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd); + bool flipped() const { return fOppPtTStart->fT > fOppPtTEnd->fT; } + SkDEBUGCODE(SkOpGlobalState* globalState() { return fGlobalState; }) + + void init(SkDEBUGCODE(SkOpGlobalState* globalState)) { + sk_bzero(this, sizeof(*this)); + SkDEBUGCODE(fGlobalState = globalState); + } + + SkCoincidentSpans* next() { return fNext; } + const SkCoincidentSpans* next() const { return fNext; } + SkCoincidentSpans** nextPtr() { return &fNext; } + const SkOpPtT* oppPtTStart() const; + const SkOpPtT* oppPtTEnd() const; + // These return non-const pointers so that, as copies, they can be added + // to a new span pair + SkOpPtT* oppPtTStartWritable() const { return const_cast(fOppPtTStart); } + SkOpPtT* oppPtTEndWritable() const { return const_cast(fOppPtTEnd); } + bool ordered(bool* result) const; + + void set(SkCoincidentSpans* next, const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, + const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd); + + void setCoinPtTEnd(const SkOpPtT* ptT) { + SkOPASSERT(ptT == ptT->span()->ptT()); + SkOPASSERT(!fCoinPtTStart || ptT->fT != fCoinPtTStart->fT); + SkASSERT(!fCoinPtTStart || fCoinPtTStart->segment() == ptT->segment()); + fCoinPtTEnd = ptT; + ptT->setCoincident(); + } + + void setCoinPtTStart(const SkOpPtT* ptT) { + SkOPASSERT(ptT == ptT->span()->ptT()); + SkOPASSERT(!fCoinPtTEnd || ptT->fT != fCoinPtTEnd->fT); + SkASSERT(!fCoinPtTEnd || fCoinPtTEnd->segment() == ptT->segment()); + fCoinPtTStart = ptT; + ptT->setCoincident(); + } + + void setEnds(const SkOpPtT* coinPtTEnd, const SkOpPtT* oppPtTEnd) { + this->setCoinPtTEnd(coinPtTEnd); + this->setOppPtTEnd(oppPtTEnd); + } + + void setOppPtTEnd(const SkOpPtT* ptT) { + SkOPASSERT(ptT == ptT->span()->ptT()); + SkOPASSERT(!fOppPtTStart || ptT->fT != fOppPtTStart->fT); + SkASSERT(!fOppPtTStart || fOppPtTStart->segment() == ptT->segment()); + fOppPtTEnd = ptT; + ptT->setCoincident(); + } + + void setOppPtTStart(const SkOpPtT* ptT) { + SkOPASSERT(ptT == ptT->span()->ptT()); + SkOPASSERT(!fOppPtTEnd || ptT->fT != fOppPtTEnd->fT); + SkASSERT(!fOppPtTEnd || fOppPtTEnd->segment() == ptT->segment()); + fOppPtTStart = ptT; + ptT->setCoincident(); + } + + void setStarts(const SkOpPtT* coinPtTStart, const SkOpPtT* oppPtTStart) { + this->setCoinPtTStart(coinPtTStart); + this->setOppPtTStart(oppPtTStart); + } + + void setNext(SkCoincidentSpans* next) { fNext = next; } + +private: + SkCoincidentSpans* fNext; + const SkOpPtT* fCoinPtTStart; + const SkOpPtT* fCoinPtTEnd; + const SkOpPtT* fOppPtTStart; + const SkOpPtT* fOppPtTEnd; + SkDEBUGCODE(SkOpGlobalState* fGlobalState); +}; + +class SkOpCoincidence { +public: + SkOpCoincidence(SkOpGlobalState* globalState) + : fHead(nullptr) + , fTop(nullptr) + , fGlobalState(globalState) + , fContinue(false) + , fSpanDeleted(false) + , fPtAllocated(false) + , fCoinExtended(false) + , fSpanMerged(false) { + globalState->setCoincidence(this); + } + + void add(SkOpPtT* coinPtTStart, SkOpPtT* coinPtTEnd, SkOpPtT* oppPtTStart, + SkOpPtT* oppPtTEnd); + bool addEndMovedSpans(DEBUG_COIN_DECLARE_ONLY_PARAMS()); + bool addExpanded(DEBUG_COIN_DECLARE_ONLY_PARAMS()); + bool addMissing(bool* added DEBUG_COIN_DECLARE_PARAMS()); + bool apply(DEBUG_COIN_DECLARE_ONLY_PARAMS()); + bool contains(const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, + const SkOpPtT* oppPtTStart, const SkOpPtT* oppPtTEnd) const; + void correctEnds(DEBUG_COIN_DECLARE_ONLY_PARAMS()); + +#if DEBUG_COIN + void debugAddEndMovedSpans(SkPathOpsDebug::GlitchLog* log) const; + void debugAddExpanded(SkPathOpsDebug::GlitchLog* ) const; + void debugAddMissing(SkPathOpsDebug::GlitchLog* , bool* added) const; + void debugAddOrOverlap(SkPathOpsDebug::GlitchLog* log, + const SkOpSegment* coinSeg, const SkOpSegment* oppSeg, + double coinTs, double coinTe, double oppTs, double oppTe, + bool* added) const; +#endif + + const SkOpAngle* debugAngle(int id) const { + return SkDEBUGRELEASE(fGlobalState->debugAngle(id), nullptr); + } + + void debugCheckBetween() const; + +#if DEBUG_COIN + void debugCheckValid(SkPathOpsDebug::GlitchLog* log) const; +#endif + + SkOpContour* debugContour(int id) const { + return SkDEBUGRELEASE(fGlobalState->debugContour(id), nullptr); + } + +#if DEBUG_COIN + void debugCorrectEnds(SkPathOpsDebug::GlitchLog* log) const; + bool debugExpand(SkPathOpsDebug::GlitchLog* ) const; + void debugMark(SkPathOpsDebug::GlitchLog* ) const; + void debugMarkCollapsed(SkPathOpsDebug::GlitchLog* , + const SkCoincidentSpans* coin, const SkOpPtT* test) const; + void debugMarkCollapsed(SkPathOpsDebug::GlitchLog* , const SkOpPtT* test) const; +#endif + + const SkOpPtT* debugPtT(int id) const { + return SkDEBUGRELEASE(fGlobalState->debugPtT(id), nullptr); + } + + const SkOpSegment* debugSegment(int id) const { + return SkDEBUGRELEASE(fGlobalState->debugSegment(id), nullptr); + } + +#if DEBUG_COIN + void debugRelease(SkPathOpsDebug::GlitchLog* , const SkCoincidentSpans* , + const SkCoincidentSpans* ) const; + void debugRelease(SkPathOpsDebug::GlitchLog* , const SkOpSegment* ) const; +#endif + void debugShowCoincidence() const; + + const SkOpSpanBase* debugSpan(int id) const { + return SkDEBUGRELEASE(fGlobalState->debugSpan(id), nullptr); + } + + void debugValidate() const; + void dump() const; + bool expand(DEBUG_COIN_DECLARE_ONLY_PARAMS()); + bool extend(const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, const SkOpPtT* oppPtTStart, + const SkOpPtT* oppPtTEnd); + bool findOverlaps(SkOpCoincidence* DEBUG_COIN_DECLARE_PARAMS()) const; + void fixUp(SkOpPtT* deleted, const SkOpPtT* kept); + + SkOpGlobalState* globalState() { + return fGlobalState; + } + + const SkOpGlobalState* globalState() const { + return fGlobalState; + } + + bool isEmpty() const { + return !fHead && !fTop; + } + + bool mark(DEBUG_COIN_DECLARE_ONLY_PARAMS()); + void markCollapsed(SkOpPtT* ); + + static bool Ordered(const SkOpPtT* coinPtTStart, const SkOpPtT* oppPtTStart) { + return Ordered(coinPtTStart->segment(), oppPtTStart->segment()); + } + + static bool Ordered(const SkOpSegment* coin, const SkOpSegment* opp); + void release(const SkOpSegment* ); + void releaseDeleted(); + +private: + void add(const SkOpPtT* coinPtTStart, const SkOpPtT* coinPtTEnd, const SkOpPtT* oppPtTStart, + const SkOpPtT* oppPtTEnd) { + this->add(const_cast(coinPtTStart), const_cast(coinPtTEnd), + const_cast(oppPtTStart), const_cast(oppPtTEnd)); + } + + bool addEndMovedSpans(const SkOpSpan* base, const SkOpSpanBase* testSpan); + bool addEndMovedSpans(const SkOpPtT* ptT); + + bool addIfMissing(const SkOpPtT* over1s, const SkOpPtT* over2s, + double tStart, double tEnd, SkOpSegment* coinSeg, SkOpSegment* oppSeg, + bool* added + SkDEBUGPARAMS(const SkOpPtT* over1e) SkDEBUGPARAMS(const SkOpPtT* over2e)); + bool addOrOverlap(SkOpSegment* coinSeg, SkOpSegment* oppSeg, + double coinTs, double coinTe, double oppTs, double oppTe, bool* added); + bool addOverlap(const SkOpSegment* seg1, const SkOpSegment* seg1o, + const SkOpSegment* seg2, const SkOpSegment* seg2o, + const SkOpPtT* overS, const SkOpPtT* overE); + bool checkOverlap(SkCoincidentSpans* check, + const SkOpSegment* coinSeg, const SkOpSegment* oppSeg, + double coinTs, double coinTe, double oppTs, double oppTe, + SkTDArray* overlaps) const; + bool contains(const SkOpSegment* seg, const SkOpSegment* opp, double oppT) const; + bool contains(const SkCoincidentSpans* coin, const SkOpSegment* seg, + const SkOpSegment* opp, double oppT) const; +#if DEBUG_COIN + void debugAddIfMissing(SkPathOpsDebug::GlitchLog* , + const SkCoincidentSpans* outer, const SkOpPtT* over1s, + const SkOpPtT* over1e) const; + void debugAddIfMissing(SkPathOpsDebug::GlitchLog* , + const SkOpPtT* over1s, const SkOpPtT* over2s, + double tStart, double tEnd, + const SkOpSegment* coinSeg, const SkOpSegment* oppSeg, bool* added, + const SkOpPtT* over1e, const SkOpPtT* over2e) const; + void debugAddEndMovedSpans(SkPathOpsDebug::GlitchLog* , + const SkOpSpan* base, const SkOpSpanBase* testSpan) const; + void debugAddEndMovedSpans(SkPathOpsDebug::GlitchLog* , + const SkOpPtT* ptT) const; +#endif + void fixUp(SkCoincidentSpans* coin, SkOpPtT* deleted, const SkOpPtT* kept); + void markCollapsed(SkCoincidentSpans* head, SkOpPtT* test); + bool overlap(const SkOpPtT* coinStart1, const SkOpPtT* coinEnd1, + const SkOpPtT* coinStart2, const SkOpPtT* coinEnd2, + double* overS, double* overE) const; + bool release(SkCoincidentSpans* coin, SkCoincidentSpans* ); + void releaseDeleted(SkCoincidentSpans* ); + void restoreHead(); + // return coinPtT->segment()->t mapped from overS->fT <= t <= overE->fT + static double TRange(const SkOpPtT* overS, double t, const SkOpSegment* coinPtT + SkDEBUGPARAMS(const SkOpPtT* overE)); + + SkCoincidentSpans* fHead; + SkCoincidentSpans* fTop; + SkOpGlobalState* fGlobalState; + bool fContinue; + bool fSpanDeleted; + bool fPtAllocated; + bool fCoinExtended; + bool fSpanMerged; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkOpContour.cpp b/gfx/skia/skia/src/pathops/SkOpContour.cpp new file mode 100644 index 0000000000..433dbcaebd --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpContour.cpp @@ -0,0 +1,110 @@ +/* +* Copyright 2013 Google Inc. +* +* Use of this source code is governed by a BSD-style license that can be +* found in the LICENSE file. +*/ +#include "src/pathops/SkOpContour.h" + +#include "src/pathops/SkPathWriter.h" + +#include + +void SkOpContour::toPath(SkPathWriter* path) const { + if (!this->count()) { + return; + } + const SkOpSegment* segment = &fHead; + do { + SkAssertResult(segment->addCurveTo(segment->head(), segment->tail(), path)); + } while ((segment = segment->next())); + path->finishContour(); + path->assemble(); +} + +void SkOpContour::toReversePath(SkPathWriter* path) const { + const SkOpSegment* segment = fTail; + do { + SkAssertResult(segment->addCurveTo(segment->tail(), segment->head(), path)); + } while ((segment = segment->prev())); + path->finishContour(); + path->assemble(); +} + +SkOpSpan* SkOpContour::undoneSpan() { + SkOpSegment* testSegment = &fHead; + do { + if (testSegment->done()) { + continue; + } + return testSegment->undoneSpan(); + } while ((testSegment = testSegment->next())); + fDone = true; + return nullptr; +} + +void SkOpContourBuilder::addConic(SkPoint pts[3], SkScalar weight) { + this->flush(); + fContour->addConic(pts, weight); +} + +void SkOpContourBuilder::addCubic(SkPoint pts[4]) { + this->flush(); + fContour->addCubic(pts); +} + +void SkOpContourBuilder::addCurve(SkPath::Verb verb, const SkPoint pts[4], SkScalar weight) { + if (SkPath::kLine_Verb == verb) { + this->addLine(pts); + return; + } + SkArenaAlloc* allocator = fContour->globalState()->allocator(); + switch (verb) { + case SkPath::kQuad_Verb: { + SkPoint* ptStorage = allocator->makeArrayDefault(3); + memcpy(ptStorage, pts, sizeof(SkPoint) * 3); + this->addQuad(ptStorage); + } break; + case SkPath::kConic_Verb: { + SkPoint* ptStorage = allocator->makeArrayDefault(3); + memcpy(ptStorage, pts, sizeof(SkPoint) * 3); + this->addConic(ptStorage, weight); + } break; + case SkPath::kCubic_Verb: { + SkPoint* ptStorage = allocator->makeArrayDefault(4); + memcpy(ptStorage, pts, sizeof(SkPoint) * 4); + this->addCubic(ptStorage); + } break; + default: + SkASSERT(0); + } +} + +void SkOpContourBuilder::addLine(const SkPoint pts[2]) { + // if the previous line added is the exact opposite, eliminate both + if (fLastIsLine) { + if (fLastLine[0] == pts[1] && fLastLine[1] == pts[0]) { + fLastIsLine = false; + return; + } else { + flush(); + } + } + memcpy(fLastLine, pts, sizeof(fLastLine)); + fLastIsLine = true; +} + +void SkOpContourBuilder::addQuad(SkPoint pts[3]) { + this->flush(); + fContour->addQuad(pts); +} + +void SkOpContourBuilder::flush() { + if (!fLastIsLine) + return; + SkArenaAlloc* allocator = fContour->globalState()->allocator(); + SkPoint* ptStorage = allocator->makeArrayDefault(2); + memcpy(ptStorage, fLastLine, sizeof(fLastLine)); + (void) fContour->addLine(ptStorage); + fLastIsLine = false; +} diff --git a/gfx/skia/skia/src/pathops/SkOpContour.h b/gfx/skia/skia/src/pathops/SkOpContour.h new file mode 100644 index 0000000000..2d55c50082 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpContour.h @@ -0,0 +1,464 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkOpContour_DEFINED +#define SkOpContour_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkDebug.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsBounds.h" +#include "src/pathops/SkPathOpsTypes.h" + +class SkOpAngle; +class SkOpCoincidence; +class SkPathWriter; +enum class SkOpRayDir; +struct SkOpRayHit; + +class SkOpContour { +public: + SkOpContour() { + reset(); + } + + bool operator<(const SkOpContour& rh) const { + return fBounds.fTop == rh.fBounds.fTop + ? fBounds.fLeft < rh.fBounds.fLeft + : fBounds.fTop < rh.fBounds.fTop; + } + + void addConic(SkPoint pts[3], SkScalar weight) { + appendSegment().addConic(pts, weight, this); + } + + void addCubic(SkPoint pts[4]) { + appendSegment().addCubic(pts, this); + } + + SkOpSegment* addLine(SkPoint pts[2]) { + SkASSERT(pts[0] != pts[1]); + return appendSegment().addLine(pts, this); + } + + void addQuad(SkPoint pts[3]) { + appendSegment().addQuad(pts, this); + } + + SkOpSegment& appendSegment() { + SkOpSegment* result = fCount++ ? this->globalState()->allocator()->make() + : &fHead; + result->setPrev(fTail); + if (fTail) { + fTail->setNext(result); + } + fTail = result; + return *result; + } + + const SkPathOpsBounds& bounds() const { + return fBounds; + } + + void calcAngles() { + SkASSERT(fCount > 0); + SkOpSegment* segment = &fHead; + do { + segment->calcAngles(); + } while ((segment = segment->next())); + } + + void complete() { + setBounds(); + } + + int count() const { + return fCount; + } + + int debugID() const { + return SkDEBUGRELEASE(fID, -1); + } + + int debugIndent() const { + return SkDEBUGRELEASE(fDebugIndent, 0); + } + + + const SkOpAngle* debugAngle(int id) const { + return SkDEBUGRELEASE(this->globalState()->debugAngle(id), nullptr); + } + + const SkOpCoincidence* debugCoincidence() const { + return this->globalState()->coincidence(); + } + +#if DEBUG_COIN + void debugCheckHealth(SkPathOpsDebug::GlitchLog* ) const; +#endif + + SkOpContour* debugContour(int id) const { + return SkDEBUGRELEASE(this->globalState()->debugContour(id), nullptr); + } + +#if DEBUG_COIN + void debugMissingCoincidence(SkPathOpsDebug::GlitchLog* log) const; + void debugMoveMultiples(SkPathOpsDebug::GlitchLog* ) const; + void debugMoveNearby(SkPathOpsDebug::GlitchLog* log) const; +#endif + + const SkOpPtT* debugPtT(int id) const { + return SkDEBUGRELEASE(this->globalState()->debugPtT(id), nullptr); + } + + const SkOpSegment* debugSegment(int id) const { + return SkDEBUGRELEASE(this->globalState()->debugSegment(id), nullptr); + } + +#if DEBUG_ACTIVE_SPANS + void debugShowActiveSpans(SkString* str) { + SkOpSegment* segment = &fHead; + do { + segment->debugShowActiveSpans(str); + } while ((segment = segment->next())); + } +#endif + + const SkOpSpanBase* debugSpan(int id) const { + return SkDEBUGRELEASE(this->globalState()->debugSpan(id), nullptr); + } + + SkOpGlobalState* globalState() const { + return fState; + } + + void debugValidate() const { +#if DEBUG_VALIDATE + const SkOpSegment* segment = &fHead; + const SkOpSegment* prior = nullptr; + do { + segment->debugValidate(); + SkASSERT(segment->prev() == prior); + prior = segment; + } while ((segment = segment->next())); + SkASSERT(prior == fTail); +#endif + } + + bool done() const { + return fDone; + } + + void dump() const; + void dumpAll() const; + void dumpAngles() const; + void dumpContours() const; + void dumpContoursAll() const; + void dumpContoursAngles() const; + void dumpContoursPts() const; + void dumpContoursPt(int segmentID) const; + void dumpContoursSegment(int segmentID) const; + void dumpContoursSpan(int segmentID) const; + void dumpContoursSpans() const; + void dumpPt(int ) const; + void dumpPts(const char* prefix = "seg") const; + void dumpPtsX(const char* prefix) const; + void dumpSegment(int ) const; + void dumpSegments(const char* prefix = "seg", SkPathOp op = (SkPathOp) -1) const; + void dumpSpan(int ) const; + void dumpSpans() const; + + const SkPoint& end() const { + return fTail->pts()[SkPathOpsVerbToPoints(fTail->verb())]; + } + + SkOpSpan* findSortableTop(SkOpContour* ); + + SkOpSegment* first() { + SkASSERT(fCount > 0); + return &fHead; + } + + const SkOpSegment* first() const { + SkASSERT(fCount > 0); + return &fHead; + } + + void indentDump() const { + SkDEBUGCODE(fDebugIndent += 2); + } + + void init(SkOpGlobalState* globalState, bool operand, bool isXor) { + fState = globalState; + fOperand = operand; + fXor = isXor; + SkDEBUGCODE(fID = globalState->nextContourID()); + } + + int isCcw() const { + return fCcw; + } + + bool isXor() const { + return fXor; + } + + void joinSegments() { + SkOpSegment* segment = &fHead; + SkOpSegment* next; + do { + next = segment->next(); + segment->joinEnds(next ? next : &fHead); + } while ((segment = next)); + } + + void markAllDone() { + SkOpSegment* segment = &fHead; + do { + segment->markAllDone(); + } while ((segment = segment->next())); + } + + // Please keep this aligned with debugMissingCoincidence() + bool missingCoincidence() { + SkASSERT(fCount > 0); + SkOpSegment* segment = &fHead; + bool result = false; + do { + if (segment->missingCoincidence()) { + result = true; + } + segment = segment->next(); + } while (segment); + return result; + } + + bool moveMultiples() { + SkASSERT(fCount > 0); + SkOpSegment* segment = &fHead; + do { + if (!segment->moveMultiples()) { + return false; + } + } while ((segment = segment->next())); + return true; + } + + bool moveNearby() { + SkASSERT(fCount > 0); + SkOpSegment* segment = &fHead; + do { + if (!segment->moveNearby()) { + return false; + } + } while ((segment = segment->next())); + return true; + } + + SkOpContour* next() { + return fNext; + } + + const SkOpContour* next() const { + return fNext; + } + + bool operand() const { + return fOperand; + } + + bool oppXor() const { + return fOppXor; + } + + void outdentDump() const { + SkDEBUGCODE(fDebugIndent -= 2); + } + + void rayCheck(const SkOpRayHit& base, SkOpRayDir dir, SkOpRayHit** hits, SkArenaAlloc*); + + void reset() { + fTail = nullptr; + fNext = nullptr; + fCount = 0; + fDone = false; + SkDEBUGCODE(fBounds.setLTRB(SK_ScalarMax, SK_ScalarMax, SK_ScalarMin, SK_ScalarMin)); + SkDEBUGCODE(fFirstSorted = -1); + SkDEBUGCODE(fDebugIndent = 0); + } + + void resetReverse() { + SkOpContour* next = this; + do { + if (!next->count()) { + continue; + } + next->fCcw = -1; + next->fReverse = false; + } while ((next = next->next())); + } + + bool reversed() const { + return fReverse; + } + + void setBounds() { + SkASSERT(fCount > 0); + const SkOpSegment* segment = &fHead; + fBounds = segment->bounds(); + while ((segment = segment->next())) { + fBounds.add(segment->bounds()); + } + } + + void setCcw(int ccw) { + fCcw = ccw; + } + + void setGlobalState(SkOpGlobalState* state) { + fState = state; + } + + void setNext(SkOpContour* contour) { +// SkASSERT(!fNext == !!contour); + fNext = contour; + } + + void setOperand(bool isOp) { + fOperand = isOp; + } + + void setOppXor(bool isOppXor) { + fOppXor = isOppXor; + } + + void setReverse() { + fReverse = true; + } + + void setXor(bool isXor) { + fXor = isXor; + } + + bool sortAngles() { + SkASSERT(fCount > 0); + SkOpSegment* segment = &fHead; + do { + FAIL_IF(!segment->sortAngles()); + } while ((segment = segment->next())); + return true; + } + + const SkPoint& start() const { + return fHead.pts()[0]; + } + + void toPartialBackward(SkPathWriter* path) const { + const SkOpSegment* segment = fTail; + do { + SkAssertResult(segment->addCurveTo(segment->tail(), segment->head(), path)); + } while ((segment = segment->prev())); + } + + void toPartialForward(SkPathWriter* path) const { + const SkOpSegment* segment = &fHead; + do { + SkAssertResult(segment->addCurveTo(segment->head(), segment->tail(), path)); + } while ((segment = segment->next())); + } + + void toReversePath(SkPathWriter* path) const; + void toPath(SkPathWriter* path) const; + SkOpSpan* undoneSpan(); + +protected: + SkOpGlobalState* fState; + SkOpSegment fHead; + SkOpSegment* fTail; + SkOpContour* fNext; + SkPathOpsBounds fBounds; + int fCcw; + int fCount; + int fFirstSorted; + bool fDone; // set by find top segment + bool fOperand; // true for the second argument to a binary operator + bool fReverse; // true if contour should be reverse written to path (used only by fix winding) + bool fXor; // set if original path had even-odd fill + bool fOppXor; // set if opposite path had even-odd fill + SkDEBUGCODE(int fID); + SkDEBUGCODE(mutable int fDebugIndent); +}; + +class SkOpContourHead : public SkOpContour { +public: + SkOpContour* appendContour() { + SkOpContour* contour = this->globalState()->allocator()->make(); + contour->setNext(nullptr); + SkOpContour* prev = this; + SkOpContour* next; + while ((next = prev->next())) { + prev = next; + } + prev->setNext(contour); + return contour; + } + + void joinAllSegments() { + SkOpContour* next = this; + do { + if (!next->count()) { + continue; + } + next->joinSegments(); + } while ((next = next->next())); + } + + void remove(SkOpContour* contour) { + if (contour == this) { + SkASSERT(this->count() == 0); + return; + } + SkASSERT(contour->next() == nullptr); + SkOpContour* prev = this; + SkOpContour* next; + while ((next = prev->next()) != contour) { + SkASSERT(next); + prev = next; + } + SkASSERT(prev); + prev->setNext(nullptr); + } + +}; + +class SkOpContourBuilder { +public: + SkOpContourBuilder(SkOpContour* contour) + : fContour(contour) + , fLastIsLine(false) { + } + + void addConic(SkPoint pts[3], SkScalar weight); + void addCubic(SkPoint pts[4]); + void addCurve(SkPath::Verb verb, const SkPoint pts[4], SkScalar weight = 1); + void addLine(const SkPoint pts[2]); + void addQuad(SkPoint pts[3]); + void flush(); + SkOpContour* contour() { return fContour; } + void setContour(SkOpContour* contour) { flush(); fContour = contour; } +protected: + SkOpContour* fContour; + SkPoint fLastLine[2]; + bool fLastIsLine; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkOpCubicHull.cpp b/gfx/skia/skia/src/pathops/SkOpCubicHull.cpp new file mode 100644 index 0000000000..39c77abe8b --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpCubicHull.cpp @@ -0,0 +1,155 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +static bool rotate(const SkDCubic& cubic, int zero, int index, SkDCubic& rotPath) { + double dy = cubic[index].fY - cubic[zero].fY; + double dx = cubic[index].fX - cubic[zero].fX; + if (approximately_zero(dy)) { + if (approximately_zero(dx)) { + return false; + } + rotPath = cubic; + if (dy) { + rotPath[index].fY = cubic[zero].fY; + int mask = other_two(index, zero); + int side1 = index ^ mask; + int side2 = zero ^ mask; + if (approximately_equal(cubic[side1].fY, cubic[zero].fY)) { + rotPath[side1].fY = cubic[zero].fY; + } + if (approximately_equal(cubic[side2].fY, cubic[zero].fY)) { + rotPath[side2].fY = cubic[zero].fY; + } + } + return true; + } + for (int i = 0; i < 4; ++i) { + rotPath[i].fX = cubic[i].fX * dx + cubic[i].fY * dy; + rotPath[i].fY = cubic[i].fY * dx - cubic[i].fX * dy; + } + return true; +} + + +// Returns 0 if negative, 1 if zero, 2 if positive +static int side(double x) { + return (x > 0) + (x >= 0); +} + +/* Given a cubic, find the convex hull described by the end and control points. + The hull may have 3 or 4 points. Cubics that degenerate into a point or line + are not considered. + + The hull is computed by assuming that three points, if unique and non-linear, + form a triangle. The fourth point may replace one of the first three, may be + discarded if in the triangle or on an edge, or may be inserted between any of + the three to form a convex quadralateral. + + The indices returned in order describe the convex hull. +*/ +int SkDCubic::convexHull(char order[4]) const { + size_t index; + // find top point + size_t yMin = 0; + for (index = 1; index < 4; ++index) { + if (fPts[yMin].fY > fPts[index].fY || (fPts[yMin].fY == fPts[index].fY + && fPts[yMin].fX > fPts[index].fX)) { + yMin = index; + } + } + order[0] = yMin; + int midX = -1; + int backupYMin = -1; + for (int pass = 0; pass < 2; ++pass) { + for (index = 0; index < 4; ++index) { + if (index == yMin) { + continue; + } + // rotate line from (yMin, index) to axis + // see if remaining two points are both above or below + // use this to find mid + int mask = other_two(yMin, index); + int side1 = yMin ^ mask; + int side2 = index ^ mask; + SkDCubic rotPath; + if (!rotate(*this, yMin, index, rotPath)) { // ! if cbc[yMin]==cbc[idx] + order[1] = side1; + order[2] = side2; + return 3; + } + int sides = side(rotPath[side1].fY - rotPath[yMin].fY); + sides ^= side(rotPath[side2].fY - rotPath[yMin].fY); + if (sides == 2) { // '2' means one remaining point <0, one >0 + if (midX >= 0) { + // one of the control points is equal to an end point + order[0] = 0; + order[1] = 3; + if (fPts[1] == fPts[0] || fPts[1] == fPts[3]) { + order[2] = 2; + return 3; + } + if (fPts[2] == fPts[0] || fPts[2] == fPts[3]) { + order[2] = 1; + return 3; + } + // one of the control points may be very nearly but not exactly equal -- + double dist1_0 = fPts[1].distanceSquared(fPts[0]); + double dist1_3 = fPts[1].distanceSquared(fPts[3]); + double dist2_0 = fPts[2].distanceSquared(fPts[0]); + double dist2_3 = fPts[2].distanceSquared(fPts[3]); + double smallest1distSq = std::min(dist1_0, dist1_3); + double smallest2distSq = std::min(dist2_0, dist2_3); + if (approximately_zero(std::min(smallest1distSq, smallest2distSq))) { + order[2] = smallest1distSq < smallest2distSq ? 2 : 1; + return 3; + } + } + midX = index; + } else if (sides == 0) { // '0' means both to one side or the other + backupYMin = index; + } + } + if (midX >= 0) { + break; + } + if (backupYMin < 0) { + break; + } + yMin = backupYMin; + backupYMin = -1; + } + if (midX < 0) { + midX = yMin ^ 3; // choose any other point + } + int mask = other_two(yMin, midX); + int least = yMin ^ mask; + int most = midX ^ mask; + order[0] = yMin; + order[1] = least; + + // see if mid value is on same side of line (least, most) as yMin + SkDCubic midPath; + if (!rotate(*this, least, most, midPath)) { // ! if cbc[least]==cbc[most] + order[2] = midX; + return 3; + } + int midSides = side(midPath[yMin].fY - midPath[least].fY); + midSides ^= side(midPath[midX].fY - midPath[least].fY); + if (midSides != 2) { // if mid point is not between + order[2] = most; + return 3; // result is a triangle + } + order[2] = midX; + order[3] = most; + return 4; // result is a quadralateral +} diff --git a/gfx/skia/skia/src/pathops/SkOpEdgeBuilder.cpp b/gfx/skia/skia/src/pathops/SkOpEdgeBuilder.cpp new file mode 100644 index 0000000000..7078f2d67c --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpEdgeBuilder.cpp @@ -0,0 +1,360 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkOpEdgeBuilder.h" + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "src/base/SkTSort.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkPathPriv.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkReduceOrder.h" + +#include +#include + +void SkOpEdgeBuilder::init() { + fOperand = false; + fXorMask[0] = fXorMask[1] = ((int)fPath->getFillType() & 1) ? kEvenOdd_PathOpsMask + : kWinding_PathOpsMask; + fUnparseable = false; + fSecondHalf = preFetch(); +} + +// very tiny points cause numerical instability : don't allow them +static SkPoint force_small_to_zero(const SkPoint& pt) { + SkPoint ret = pt; + if (SkScalarAbs(ret.fX) < FLT_EPSILON_ORDERABLE_ERR) { + ret.fX = 0; + } + if (SkScalarAbs(ret.fY) < FLT_EPSILON_ORDERABLE_ERR) { + ret.fY = 0; + } + return ret; +} + +static bool can_add_curve(SkPath::Verb verb, SkPoint* curve) { + if (SkPath::kMove_Verb == verb) { + return false; + } + for (int index = 0; index <= SkPathOpsVerbToPoints(verb); ++index) { + curve[index] = force_small_to_zero(curve[index]); + } + return SkPath::kLine_Verb != verb || !SkDPoint::ApproximatelyEqual(curve[0], curve[1]); +} + +void SkOpEdgeBuilder::addOperand(const SkPath& path) { + SkASSERT(!fPathVerbs.empty() && fPathVerbs.back() == SkPath::kDone_Verb); + fPathVerbs.pop_back(); + fPath = &path; + fXorMask[1] = ((int)fPath->getFillType() & 1) ? kEvenOdd_PathOpsMask + : kWinding_PathOpsMask; + preFetch(); +} + +bool SkOpEdgeBuilder::finish() { + fOperand = false; + if (fUnparseable || !walk()) { + return false; + } + complete(); + SkOpContour* contour = fContourBuilder.contour(); + if (contour && !contour->count()) { + fContoursHead->remove(contour); + } + return true; +} + +void SkOpEdgeBuilder::closeContour(const SkPoint& curveEnd, const SkPoint& curveStart) { + if (!SkDPoint::ApproximatelyEqual(curveEnd, curveStart)) { + *fPathVerbs.append() = SkPath::kLine_Verb; + *fPathPts.append() = curveStart; + } else { + int verbCount = fPathVerbs.size(); + int ptsCount = fPathPts.size(); + if (SkPath::kLine_Verb == fPathVerbs[verbCount - 1] + && fPathPts[ptsCount - 2] == curveStart) { + fPathVerbs.pop_back(); + fPathPts.pop_back(); + } else { + fPathPts[ptsCount - 1] = curveStart; + } + } + *fPathVerbs.append() = SkPath::kClose_Verb; +} + +int SkOpEdgeBuilder::preFetch() { + if (!fPath->isFinite()) { + fUnparseable = true; + return 0; + } + SkPoint curveStart; + SkPoint curve[4]; + bool lastCurve = false; + for (auto [pathVerb, pts, w] : SkPathPriv::Iterate(*fPath)) { + auto verb = static_cast(pathVerb); + switch (verb) { + case SkPath::kMove_Verb: + if (!fAllowOpenContours && lastCurve) { + closeContour(curve[0], curveStart); + } + *fPathVerbs.append() = verb; + curve[0] = force_small_to_zero(pts[0]); + *fPathPts.append() = curve[0]; + curveStart = curve[0]; + lastCurve = false; + continue; + case SkPath::kLine_Verb: + curve[1] = force_small_to_zero(pts[1]); + if (SkDPoint::ApproximatelyEqual(curve[0], curve[1])) { + uint8_t lastVerb = fPathVerbs.back(); + if (lastVerb != SkPath::kLine_Verb && lastVerb != SkPath::kMove_Verb) { + fPathPts.back() = curve[0] = curve[1]; + } + continue; // skip degenerate points + } + break; + case SkPath::kQuad_Verb: + curve[1] = force_small_to_zero(pts[1]); + curve[2] = force_small_to_zero(pts[2]); + verb = SkReduceOrder::Quad(curve, curve); + if (verb == SkPath::kMove_Verb) { + continue; // skip degenerate points + } + break; + case SkPath::kConic_Verb: + curve[1] = force_small_to_zero(pts[1]); + curve[2] = force_small_to_zero(pts[2]); + verb = SkReduceOrder::Quad(curve, curve); + if (SkPath::kQuad_Verb == verb && 1 != *w) { + verb = SkPath::kConic_Verb; + } else if (verb == SkPath::kMove_Verb) { + continue; // skip degenerate points + } + break; + case SkPath::kCubic_Verb: + curve[1] = force_small_to_zero(pts[1]); + curve[2] = force_small_to_zero(pts[2]); + curve[3] = force_small_to_zero(pts[3]); + verb = SkReduceOrder::Cubic(curve, curve); + if (verb == SkPath::kMove_Verb) { + continue; // skip degenerate points + } + break; + case SkPath::kClose_Verb: + closeContour(curve[0], curveStart); + lastCurve = false; + continue; + case SkPath::kDone_Verb: + continue; + } + *fPathVerbs.append() = verb; + int ptCount = SkPathOpsVerbToPoints(verb); + fPathPts.append(ptCount, &curve[1]); + if (verb == SkPath::kConic_Verb) { + *fWeights.append() = *w; + } + curve[0] = curve[ptCount]; + lastCurve = true; + } + if (!fAllowOpenContours && lastCurve) { + closeContour(curve[0], curveStart); + } + *fPathVerbs.append() = SkPath::kDone_Verb; + return fPathVerbs.size() - 1; +} + +bool SkOpEdgeBuilder::close() { + complete(); + return true; +} + +bool SkOpEdgeBuilder::walk() { + uint8_t* verbPtr = fPathVerbs.begin(); + uint8_t* endOfFirstHalf = &verbPtr[fSecondHalf]; + SkPoint* pointsPtr = fPathPts.begin(); + SkScalar* weightPtr = fWeights.begin(); + SkPath::Verb verb; + SkOpContour* contour = fContourBuilder.contour(); + int moveToPtrBump = 0; + while ((verb = (SkPath::Verb) *verbPtr) != SkPath::kDone_Verb) { + if (verbPtr == endOfFirstHalf) { + fOperand = true; + } + verbPtr++; + switch (verb) { + case SkPath::kMove_Verb: + if (contour && contour->count()) { + if (fAllowOpenContours) { + complete(); + } else if (!close()) { + return false; + } + } + if (!contour) { + fContourBuilder.setContour(contour = fContoursHead->appendContour()); + } + contour->init(fGlobalState, fOperand, + fXorMask[fOperand] == kEvenOdd_PathOpsMask); + pointsPtr += moveToPtrBump; + moveToPtrBump = 1; + continue; + case SkPath::kLine_Verb: + fContourBuilder.addLine(pointsPtr); + break; + case SkPath::kQuad_Verb: + { + SkVector vec1 = pointsPtr[1] - pointsPtr[0]; + SkVector vec2 = pointsPtr[2] - pointsPtr[1]; + if (vec1.dot(vec2) < 0) { + SkPoint pair[5]; + if (SkChopQuadAtMaxCurvature(pointsPtr, pair) == 1) { + goto addOneQuad; + } + if (!SkScalarsAreFinite(&pair[0].fX, std::size(pair) * 2)) { + return false; + } + for (unsigned index = 0; index < std::size(pair); ++index) { + pair[index] = force_small_to_zero(pair[index]); + } + SkPoint cStorage[2][2]; + SkPath::Verb v1 = SkReduceOrder::Quad(&pair[0], cStorage[0]); + SkPath::Verb v2 = SkReduceOrder::Quad(&pair[2], cStorage[1]); + SkPoint* curve1 = v1 != SkPath::kLine_Verb ? &pair[0] : cStorage[0]; + SkPoint* curve2 = v2 != SkPath::kLine_Verb ? &pair[2] : cStorage[1]; + if (can_add_curve(v1, curve1) && can_add_curve(v2, curve2)) { + fContourBuilder.addCurve(v1, curve1); + fContourBuilder.addCurve(v2, curve2); + break; + } + } + } + addOneQuad: + fContourBuilder.addQuad(pointsPtr); + break; + case SkPath::kConic_Verb: { + SkVector vec1 = pointsPtr[1] - pointsPtr[0]; + SkVector vec2 = pointsPtr[2] - pointsPtr[1]; + SkScalar weight = *weightPtr++; + if (vec1.dot(vec2) < 0) { + // FIXME: max curvature for conics hasn't been implemented; use placeholder + SkScalar maxCurvature = SkFindQuadMaxCurvature(pointsPtr); + if (0 < maxCurvature && maxCurvature < 1) { + SkConic conic(pointsPtr, weight); + SkConic pair[2]; + if (!conic.chopAt(maxCurvature, pair)) { + // if result can't be computed, use original + fContourBuilder.addConic(pointsPtr, weight); + break; + } + SkPoint cStorage[2][3]; + SkPath::Verb v1 = SkReduceOrder::Conic(pair[0], cStorage[0]); + SkPath::Verb v2 = SkReduceOrder::Conic(pair[1], cStorage[1]); + SkPoint* curve1 = v1 != SkPath::kLine_Verb ? pair[0].fPts : cStorage[0]; + SkPoint* curve2 = v2 != SkPath::kLine_Verb ? pair[1].fPts : cStorage[1]; + if (can_add_curve(v1, curve1) && can_add_curve(v2, curve2)) { + fContourBuilder.addCurve(v1, curve1, pair[0].fW); + fContourBuilder.addCurve(v2, curve2, pair[1].fW); + break; + } + } + } + fContourBuilder.addConic(pointsPtr, weight); + } break; + case SkPath::kCubic_Verb: + { + // Split complex cubics (such as self-intersecting curves or + // ones with difficult curvature) in two before proceeding. + // This can be required for intersection to succeed. + SkScalar splitT[3]; + int breaks = SkDCubic::ComplexBreak(pointsPtr, splitT); + if (!breaks) { + fContourBuilder.addCubic(pointsPtr); + break; + } + SkASSERT(breaks <= (int) std::size(splitT)); + struct Splitsville { + double fT[2]; + SkPoint fPts[4]; + SkPoint fReduced[4]; + SkPath::Verb fVerb; + bool fCanAdd; + } splits[4]; + SkASSERT(std::size(splits) == std::size(splitT) + 1); + SkTQSort(splitT, splitT + breaks); + for (int index = 0; index <= breaks; ++index) { + Splitsville* split = &splits[index]; + split->fT[0] = index ? splitT[index - 1] : 0; + split->fT[1] = index < breaks ? splitT[index] : 1; + SkDCubic part = SkDCubic::SubDivide(pointsPtr, split->fT[0], split->fT[1]); + if (!part.toFloatPoints(split->fPts)) { + return false; + } + split->fVerb = SkReduceOrder::Cubic(split->fPts, split->fReduced); + SkPoint* curve = SkPath::kCubic_Verb == split->fVerb + ? split->fPts : split->fReduced; + split->fCanAdd = can_add_curve(split->fVerb, curve); + } + for (int index = 0; index <= breaks; ++index) { + Splitsville* split = &splits[index]; + if (!split->fCanAdd) { + continue; + } + int prior = index; + while (prior > 0 && !splits[prior - 1].fCanAdd) { + --prior; + } + if (prior < index) { + split->fT[0] = splits[prior].fT[0]; + split->fPts[0] = splits[prior].fPts[0]; + } + int next = index; + int breakLimit = std::min(breaks, (int) std::size(splits) - 1); + while (next < breakLimit && !splits[next + 1].fCanAdd) { + ++next; + } + if (next > index) { + split->fT[1] = splits[next].fT[1]; + split->fPts[3] = splits[next].fPts[3]; + } + if (prior < index || next > index) { + split->fVerb = SkReduceOrder::Cubic(split->fPts, split->fReduced); + } + SkPoint* curve = SkPath::kCubic_Verb == split->fVerb + ? split->fPts : split->fReduced; + if (!can_add_curve(split->fVerb, curve)) { + return false; + } + fContourBuilder.addCurve(split->fVerb, curve); + } + } + break; + case SkPath::kClose_Verb: + SkASSERT(contour); + if (!close()) { + return false; + } + contour = nullptr; + continue; + default: + SkDEBUGFAIL("bad verb"); + return false; + } + SkASSERT(contour); + if (contour->count()) { + contour->debugValidate(); + } + pointsPtr += SkPathOpsVerbToPoints(verb); + } + fContourBuilder.flush(); + if (contour && contour->count() &&!fAllowOpenContours && !close()) { + return false; + } + return true; +} diff --git a/gfx/skia/skia/src/pathops/SkOpEdgeBuilder.h b/gfx/skia/skia/src/pathops/SkOpEdgeBuilder.h new file mode 100644 index 0000000000..7c01756226 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpEdgeBuilder.h @@ -0,0 +1,83 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkOpEdgeBuilder_DEFINED +#define SkOpEdgeBuilder_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkTDArray.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkPathOpsTypes.h" +#include "src/pathops/SkPathWriter.h" + +#include + +class SkPath; + +class SkOpEdgeBuilder { +public: + SkOpEdgeBuilder(const SkPathWriter& path, SkOpContourHead* contours2, + SkOpGlobalState* globalState) + : fGlobalState(globalState) + , fPath(path.nativePath()) + , fContourBuilder(contours2) + , fContoursHead(contours2) + , fAllowOpenContours(true) { + init(); + } + + SkOpEdgeBuilder(const SkPath& path, SkOpContourHead* contours2, SkOpGlobalState* globalState) + : fGlobalState(globalState) + , fPath(&path) + , fContourBuilder(contours2) + , fContoursHead(contours2) + , fAllowOpenContours(false) { + init(); + } + + void addOperand(const SkPath& path); + + void complete() { + fContourBuilder.flush(); + SkOpContour* contour = fContourBuilder.contour(); + if (contour && contour->count()) { + contour->complete(); + fContourBuilder.setContour(nullptr); + } + } + + bool finish(); + + const SkOpContour* head() const { + return fContoursHead; + } + + void init(); + bool unparseable() const { return fUnparseable; } + SkPathOpsMask xorMask() const { return fXorMask[fOperand]; } + +private: + void closeContour(const SkPoint& curveEnd, const SkPoint& curveStart); + bool close(); + int preFetch(); + bool walk(); + + SkOpGlobalState* fGlobalState; + const SkPath* fPath; + SkTDArray fPathPts; + SkTDArray fWeights; + SkTDArray fPathVerbs; + SkOpContourBuilder fContourBuilder; + SkOpContourHead* fContoursHead; + SkPathOpsMask fXorMask[2]; + int fSecondHalf; + bool fOperand; + bool fAllowOpenContours; + bool fUnparseable; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkOpSegment.cpp b/gfx/skia/skia/src/pathops/SkOpSegment.cpp new file mode 100644 index 0000000000..6a1d406c07 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpSegment.cpp @@ -0,0 +1,1787 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkOpSegment.h" + +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkPointPriv.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkOpCoincidence.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathWriter.h" + +#include +#include + +/* +After computing raw intersections, post process all segments to: +- find small collections of points that can be collapsed to a single point +- find missing intersections to resolve differences caused by different algorithms + +Consider segments containing tiny or small intervals. Consider coincident segments +because coincidence finds intersections through distance measurement that non-coincident +intersection tests cannot. + */ + +#define F (false) // discard the edge +#define T (true) // keep the edge + +static const bool gUnaryActiveEdge[2][2] = { +// from=0 from=1 +// to=0,1 to=0,1 + {F, T}, {T, F}, +}; + +static const bool gActiveEdge[kXOR_SkPathOp + 1][2][2][2][2] = { +// miFrom=0 miFrom=1 +// miTo=0 miTo=1 miTo=0 miTo=1 +// suFrom=0 1 suFrom=0 1 suFrom=0 1 suFrom=0 1 +// suTo=0,1 suTo=0,1 suTo=0,1 suTo=0,1 suTo=0,1 suTo=0,1 suTo=0,1 suTo=0,1 + {{{{F, F}, {F, F}}, {{T, F}, {T, F}}}, {{{T, T}, {F, F}}, {{F, T}, {T, F}}}}, // mi - su + {{{{F, F}, {F, F}}, {{F, T}, {F, T}}}, {{{F, F}, {T, T}}, {{F, T}, {T, F}}}}, // mi & su + {{{{F, T}, {T, F}}, {{T, T}, {F, F}}}, {{{T, F}, {T, F}}, {{F, F}, {F, F}}}}, // mi | su + {{{{F, T}, {T, F}}, {{T, F}, {F, T}}}, {{{T, F}, {F, T}}, {{F, T}, {T, F}}}}, // mi ^ su +}; + +#undef F +#undef T + +SkOpAngle* SkOpSegment::activeAngle(SkOpSpanBase* start, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr, bool* done) { + if (SkOpAngle* result = activeAngleInner(start, startPtr, endPtr, done)) { + return result; + } + if (SkOpAngle* result = activeAngleOther(start, startPtr, endPtr, done)) { + return result; + } + return nullptr; +} + +SkOpAngle* SkOpSegment::activeAngleInner(SkOpSpanBase* start, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr, bool* done) { + SkOpSpan* upSpan = start->upCastable(); + if (upSpan) { + if (upSpan->windValue() || upSpan->oppValue()) { + SkOpSpanBase* next = upSpan->next(); + if (!*endPtr) { + *startPtr = start; + *endPtr = next; + } + if (!upSpan->done()) { + if (upSpan->windSum() != SK_MinS32) { + return spanToAngle(start, next); + } + *done = false; + } + } else { + SkASSERT(upSpan->done()); + } + } + SkOpSpan* downSpan = start->prev(); + // edge leading into junction + if (downSpan) { + if (downSpan->windValue() || downSpan->oppValue()) { + if (!*endPtr) { + *startPtr = start; + *endPtr = downSpan; + } + if (!downSpan->done()) { + if (downSpan->windSum() != SK_MinS32) { + return spanToAngle(start, downSpan); + } + *done = false; + } + } else { + SkASSERT(downSpan->done()); + } + } + return nullptr; +} + +SkOpAngle* SkOpSegment::activeAngleOther(SkOpSpanBase* start, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr, bool* done) { + SkOpPtT* oPtT = start->ptT()->next(); + SkOpSegment* other = oPtT->segment(); + SkOpSpanBase* oSpan = oPtT->span(); + return other->activeAngleInner(oSpan, startPtr, endPtr, done); +} + +bool SkOpSegment::activeOp(SkOpSpanBase* start, SkOpSpanBase* end, int xorMiMask, int xorSuMask, + SkPathOp op) { + int sumMiWinding = this->updateWinding(end, start); + int sumSuWinding = this->updateOppWinding(end, start); +#if DEBUG_LIMIT_WIND_SUM + SkASSERT(abs(sumMiWinding) <= DEBUG_LIMIT_WIND_SUM); + SkASSERT(abs(sumSuWinding) <= DEBUG_LIMIT_WIND_SUM); +#endif + if (this->operand()) { + using std::swap; + swap(sumMiWinding, sumSuWinding); + } + return this->activeOp(xorMiMask, xorSuMask, start, end, op, &sumMiWinding, &sumSuWinding); +} + +bool SkOpSegment::activeOp(int xorMiMask, int xorSuMask, SkOpSpanBase* start, SkOpSpanBase* end, + SkPathOp op, int* sumMiWinding, int* sumSuWinding) { + int maxWinding, sumWinding, oppMaxWinding, oppSumWinding; + this->setUpWindings(start, end, sumMiWinding, sumSuWinding, + &maxWinding, &sumWinding, &oppMaxWinding, &oppSumWinding); + bool miFrom; + bool miTo; + bool suFrom; + bool suTo; + if (operand()) { + miFrom = (oppMaxWinding & xorMiMask) != 0; + miTo = (oppSumWinding & xorMiMask) != 0; + suFrom = (maxWinding & xorSuMask) != 0; + suTo = (sumWinding & xorSuMask) != 0; + } else { + miFrom = (maxWinding & xorMiMask) != 0; + miTo = (sumWinding & xorMiMask) != 0; + suFrom = (oppMaxWinding & xorSuMask) != 0; + suTo = (oppSumWinding & xorSuMask) != 0; + } + bool result = gActiveEdge[op][miFrom][miTo][suFrom][suTo]; +#if DEBUG_ACTIVE_OP + SkDebugf("%s id=%d t=%1.9g tEnd=%1.9g op=%s miFrom=%d miTo=%d suFrom=%d suTo=%d result=%d\n", + __FUNCTION__, debugID(), start->t(), end->t(), + SkPathOpsDebug::kPathOpStr[op], miFrom, miTo, suFrom, suTo, result); +#endif + return result; +} + +bool SkOpSegment::activeWinding(SkOpSpanBase* start, SkOpSpanBase* end) { + int sumWinding = updateWinding(end, start); + return activeWinding(start, end, &sumWinding); +} + +bool SkOpSegment::activeWinding(SkOpSpanBase* start, SkOpSpanBase* end, int* sumWinding) { + int maxWinding; + setUpWinding(start, end, &maxWinding, sumWinding); + bool from = maxWinding != 0; + bool to = *sumWinding != 0; + bool result = gUnaryActiveEdge[from][to]; + return result; +} + +bool SkOpSegment::addCurveTo(const SkOpSpanBase* start, const SkOpSpanBase* end, + SkPathWriter* path) const { + const SkOpSpan* spanStart = start->starter(end); + FAIL_IF(spanStart->alreadyAdded()); + const_cast(spanStart)->markAdded(); + SkDCurveSweep curvePart; + start->segment()->subDivide(start, end, &curvePart.fCurve); + curvePart.setCurveHullSweep(fVerb); + SkPath::Verb verb = curvePart.isCurve() ? fVerb : SkPath::kLine_Verb; + path->deferredMove(start->ptT()); + switch (verb) { + case SkPath::kLine_Verb: + FAIL_IF(!path->deferredLine(end->ptT())); + break; + case SkPath::kQuad_Verb: + path->quadTo(curvePart.fCurve.fQuad[1].asSkPoint(), end->ptT()); + break; + case SkPath::kConic_Verb: + path->conicTo(curvePart.fCurve.fConic[1].asSkPoint(), end->ptT(), + curvePart.fCurve.fConic.fWeight); + break; + case SkPath::kCubic_Verb: + path->cubicTo(curvePart.fCurve.fCubic[1].asSkPoint(), + curvePart.fCurve.fCubic[2].asSkPoint(), end->ptT()); + break; + default: + SkASSERT(0); + } + return true; +} + +const SkOpPtT* SkOpSegment::existing(double t, const SkOpSegment* opp) const { + const SkOpSpanBase* test = &fHead; + const SkOpPtT* testPtT; + SkPoint pt = this->ptAtT(t); + do { + testPtT = test->ptT(); + if (testPtT->fT == t) { + break; + } + if (!this->match(testPtT, this, t, pt)) { + if (t < testPtT->fT) { + return nullptr; + } + continue; + } + if (!opp) { + return testPtT; + } + const SkOpPtT* loop = testPtT->next(); + while (loop != testPtT) { + if (loop->segment() == this && loop->fT == t && loop->fPt == pt) { + goto foundMatch; + } + loop = loop->next(); + } + return nullptr; + } while ((test = test->upCast()->next())); +foundMatch: + return opp && !test->contains(opp) ? nullptr : testPtT; +} + +// break the span so that the coincident part does not change the angle of the remainder +bool SkOpSegment::addExpanded(double newT, const SkOpSpanBase* test, bool* startOver) { + if (this->contains(newT)) { + return true; + } + this->globalState()->resetAllocatedOpSpan(); + FAIL_IF(!between(0, newT, 1)); + SkOpPtT* newPtT = this->addT(newT); + *startOver |= this->globalState()->allocatedOpSpan(); + if (!newPtT) { + return false; + } + newPtT->fPt = this->ptAtT(newT); + SkOpPtT* oppPrev = test->ptT()->oppPrev(newPtT); + if (oppPrev) { + // const cast away to change linked list; pt/t values stays unchanged + SkOpSpanBase* writableTest = const_cast(test); + writableTest->mergeMatches(newPtT->span()); + writableTest->ptT()->addOpp(newPtT, oppPrev); + writableTest->checkForCollapsedCoincidence(); + } + return true; +} + +// Please keep this in sync with debugAddT() +SkOpPtT* SkOpSegment::addT(double t, const SkPoint& pt) { + debugValidate(); + SkOpSpanBase* spanBase = &fHead; + do { + SkOpPtT* result = spanBase->ptT(); + if (t == result->fT || (!zero_or_one(t) && this->match(result, this, t, pt))) { + spanBase->bumpSpanAdds(); + return result; + } + if (t < result->fT) { + SkOpSpan* prev = result->span()->prev(); + FAIL_WITH_NULL_IF(!prev); + // marks in global state that new op span has been allocated + SkOpSpan* span = this->insert(prev); + span->init(this, prev, t, pt); + this->debugValidate(); +#if DEBUG_ADD_T + SkDebugf("%s insert t=%1.9g segID=%d spanID=%d\n", __FUNCTION__, t, + span->segment()->debugID(), span->debugID()); +#endif + span->bumpSpanAdds(); + return span->ptT(); + } + FAIL_WITH_NULL_IF(spanBase == &fTail); + } while ((spanBase = spanBase->upCast()->next())); + SkASSERT(0); + return nullptr; // we never get here, but need this to satisfy compiler +} + +SkOpPtT* SkOpSegment::addT(double t) { + return addT(t, this->ptAtT(t)); +} + +void SkOpSegment::calcAngles() { + bool activePrior = !fHead.isCanceled(); + if (activePrior && !fHead.simple()) { + addStartSpan(); + } + SkOpSpan* prior = &fHead; + SkOpSpanBase* spanBase = fHead.next(); + while (spanBase != &fTail) { + if (activePrior) { + SkOpAngle* priorAngle = this->globalState()->allocator()->make(); + priorAngle->set(spanBase, prior); + spanBase->setFromAngle(priorAngle); + } + SkOpSpan* span = spanBase->upCast(); + bool active = !span->isCanceled(); + SkOpSpanBase* next = span->next(); + if (active) { + SkOpAngle* angle = this->globalState()->allocator()->make(); + angle->set(span, next); + span->setToAngle(angle); + } + activePrior = active; + prior = span; + spanBase = next; + } + if (activePrior && !fTail.simple()) { + addEndSpan(); + } +} + +// Please keep this in sync with debugClearAll() +void SkOpSegment::clearAll() { + SkOpSpan* span = &fHead; + do { + this->clearOne(span); + } while ((span = span->next()->upCastable())); + this->globalState()->coincidence()->release(this); +} + +// Please keep this in sync with debugClearOne() +void SkOpSegment::clearOne(SkOpSpan* span) { + span->setWindValue(0); + span->setOppValue(0); + this->markDone(span); +} + +SkOpSpanBase::Collapsed SkOpSegment::collapsed(double s, double e) const { + const SkOpSpanBase* span = &fHead; + do { + SkOpSpanBase::Collapsed result = span->collapsed(s, e); + if (SkOpSpanBase::Collapsed::kNo != result) { + return result; + } + } while (span->upCastable() && (span = span->upCast()->next())); + return SkOpSpanBase::Collapsed::kNo; +} + +bool SkOpSegment::ComputeOneSum(const SkOpAngle* baseAngle, SkOpAngle* nextAngle, + SkOpAngle::IncludeType includeType) { + SkOpSegment* baseSegment = baseAngle->segment(); + int sumMiWinding = baseSegment->updateWindingReverse(baseAngle); + int sumSuWinding; + bool binary = includeType >= SkOpAngle::kBinarySingle; + if (binary) { + sumSuWinding = baseSegment->updateOppWindingReverse(baseAngle); + if (baseSegment->operand()) { + using std::swap; + swap(sumMiWinding, sumSuWinding); + } + } + SkOpSegment* nextSegment = nextAngle->segment(); + int maxWinding, sumWinding; + SkOpSpanBase* last = nullptr; + if (binary) { + int oppMaxWinding, oppSumWinding; + nextSegment->setUpWindings(nextAngle->start(), nextAngle->end(), &sumMiWinding, + &sumSuWinding, &maxWinding, &sumWinding, &oppMaxWinding, &oppSumWinding); + if (!nextSegment->markAngle(maxWinding, sumWinding, oppMaxWinding, oppSumWinding, + nextAngle, &last)) { + return false; + } + } else { + nextSegment->setUpWindings(nextAngle->start(), nextAngle->end(), &sumMiWinding, + &maxWinding, &sumWinding); + if (!nextSegment->markAngle(maxWinding, sumWinding, nextAngle, &last)) { + return false; + } + } + nextAngle->setLastMarked(last); + return true; +} + +bool SkOpSegment::ComputeOneSumReverse(SkOpAngle* baseAngle, SkOpAngle* nextAngle, + SkOpAngle::IncludeType includeType) { + SkOpSegment* baseSegment = baseAngle->segment(); + int sumMiWinding = baseSegment->updateWinding(baseAngle); + int sumSuWinding; + bool binary = includeType >= SkOpAngle::kBinarySingle; + if (binary) { + sumSuWinding = baseSegment->updateOppWinding(baseAngle); + if (baseSegment->operand()) { + using std::swap; + swap(sumMiWinding, sumSuWinding); + } + } + SkOpSegment* nextSegment = nextAngle->segment(); + int maxWinding, sumWinding; + SkOpSpanBase* last = nullptr; + if (binary) { + int oppMaxWinding, oppSumWinding; + nextSegment->setUpWindings(nextAngle->end(), nextAngle->start(), &sumMiWinding, + &sumSuWinding, &maxWinding, &sumWinding, &oppMaxWinding, &oppSumWinding); + if (!nextSegment->markAngle(maxWinding, sumWinding, oppMaxWinding, oppSumWinding, + nextAngle, &last)) { + return false; + } + } else { + nextSegment->setUpWindings(nextAngle->end(), nextAngle->start(), &sumMiWinding, + &maxWinding, &sumWinding); + if (!nextSegment->markAngle(maxWinding, sumWinding, nextAngle, &last)) { + return false; + } + } + nextAngle->setLastMarked(last); + return true; +} + +// at this point, the span is already ordered, or unorderable +int SkOpSegment::computeSum(SkOpSpanBase* start, SkOpSpanBase* end, + SkOpAngle::IncludeType includeType) { + SkASSERT(includeType != SkOpAngle::kUnaryXor); + SkOpAngle* firstAngle = this->spanToAngle(end, start); + if (nullptr == firstAngle || nullptr == firstAngle->next()) { + return SK_NaN32; + } + // if all angles have a computed winding, + // or if no adjacent angles are orderable, + // or if adjacent orderable angles have no computed winding, + // there's nothing to do + // if two orderable angles are adjacent, and both are next to orderable angles, + // and one has winding computed, transfer to the other + SkOpAngle* baseAngle = nullptr; + bool tryReverse = false; + // look for counterclockwise transfers + SkOpAngle* angle = firstAngle->previous(); + SkOpAngle* next = angle->next(); + firstAngle = next; + do { + SkOpAngle* prior = angle; + angle = next; + next = angle->next(); + SkASSERT(prior->next() == angle); + SkASSERT(angle->next() == next); + if (prior->unorderable() || angle->unorderable() || next->unorderable()) { + baseAngle = nullptr; + continue; + } + int testWinding = angle->starter()->windSum(); + if (SK_MinS32 != testWinding) { + baseAngle = angle; + tryReverse = true; + continue; + } + if (baseAngle) { + ComputeOneSum(baseAngle, angle, includeType); + baseAngle = SK_MinS32 != angle->starter()->windSum() ? angle : nullptr; + } + } while (next != firstAngle); + if (baseAngle && SK_MinS32 == firstAngle->starter()->windSum()) { + firstAngle = baseAngle; + tryReverse = true; + } + if (tryReverse) { + baseAngle = nullptr; + SkOpAngle* prior = firstAngle; + do { + angle = prior; + prior = angle->previous(); + SkASSERT(prior->next() == angle); + next = angle->next(); + if (prior->unorderable() || angle->unorderable() || next->unorderable()) { + baseAngle = nullptr; + continue; + } + int testWinding = angle->starter()->windSum(); + if (SK_MinS32 != testWinding) { + baseAngle = angle; + continue; + } + if (baseAngle) { + ComputeOneSumReverse(baseAngle, angle, includeType); + baseAngle = SK_MinS32 != angle->starter()->windSum() ? angle : nullptr; + } + } while (prior != firstAngle); + } + return start->starter(end)->windSum(); +} + +bool SkOpSegment::contains(double newT) const { + const SkOpSpanBase* spanBase = &fHead; + do { + if (spanBase->ptT()->contains(this, newT)) { + return true; + } + if (spanBase == &fTail) { + break; + } + spanBase = spanBase->upCast()->next(); + } while (true); + return false; +} + +void SkOpSegment::release(const SkOpSpan* span) { + if (span->done()) { + --fDoneCount; + } + --fCount; + SkOPASSERT(fCount >= fDoneCount); +} + +#if DEBUG_ANGLE +// called only by debugCheckNearCoincidence +double SkOpSegment::distSq(double t, const SkOpAngle* oppAngle) const { + SkDPoint testPt = this->dPtAtT(t); + SkDLine testPerp = {{ testPt, testPt }}; + SkDVector slope = this->dSlopeAtT(t); + testPerp[1].fX += slope.fY; + testPerp[1].fY -= slope.fX; + SkIntersections i; + const SkOpSegment* oppSegment = oppAngle->segment(); + (*CurveIntersectRay[oppSegment->verb()])(oppSegment->pts(), oppSegment->weight(), testPerp, &i); + double closestDistSq = SK_ScalarInfinity; + for (int index = 0; index < i.used(); ++index) { + if (!between(oppAngle->start()->t(), i[0][index], oppAngle->end()->t())) { + continue; + } + double testDistSq = testPt.distanceSquared(i.pt(index)); + if (closestDistSq > testDistSq) { + closestDistSq = testDistSq; + } + } + return closestDistSq; +} +#endif + +/* + The M and S variable name parts stand for the operators. + Mi stands for Minuend (see wiki subtraction, analogous to difference) + Su stands for Subtrahend + The Opp variable name part designates that the value is for the Opposite operator. + Opposite values result from combining coincident spans. + */ +SkOpSegment* SkOpSegment::findNextOp(SkTDArray* chase, SkOpSpanBase** nextStart, + SkOpSpanBase** nextEnd, bool* unsortable, bool* simple, + SkPathOp op, int xorMiMask, int xorSuMask) { + SkOpSpanBase* start = *nextStart; + SkOpSpanBase* end = *nextEnd; + SkASSERT(start != end); + int step = start->step(end); + SkOpSegment* other = this->isSimple(nextStart, &step); // advances nextStart + if ((*simple = other)) { + // mark the smaller of startIndex, endIndex done, and all adjacent + // spans with the same T value (but not 'other' spans) +#if DEBUG_WINDING + SkDebugf("%s simple\n", __FUNCTION__); +#endif + SkOpSpan* startSpan = start->starter(end); + if (startSpan->done()) { + return nullptr; + } + markDone(startSpan); + *nextEnd = step > 0 ? (*nextStart)->upCast()->next() : (*nextStart)->prev(); + return other; + } + SkOpSpanBase* endNear = step > 0 ? (*nextStart)->upCast()->next() : (*nextStart)->prev(); + SkASSERT(endNear == end); // is this ever not end? + SkASSERT(endNear); + SkASSERT(start != endNear); + SkASSERT((start->t() < endNear->t()) ^ (step < 0)); + // more than one viable candidate -- measure angles to find best + int calcWinding = computeSum(start, endNear, SkOpAngle::kBinaryOpp); + bool sortable = calcWinding != SK_NaN32; + if (!sortable) { + *unsortable = true; + markDone(start->starter(end)); + return nullptr; + } + SkOpAngle* angle = this->spanToAngle(end, start); + if (angle->unorderable()) { + *unsortable = true; + markDone(start->starter(end)); + return nullptr; + } +#if DEBUG_SORT + SkDebugf("%s\n", __FUNCTION__); + angle->debugLoop(); +#endif + int sumMiWinding = updateWinding(end, start); + if (sumMiWinding == SK_MinS32) { + *unsortable = true; + markDone(start->starter(end)); + return nullptr; + } + int sumSuWinding = updateOppWinding(end, start); + if (operand()) { + using std::swap; + swap(sumMiWinding, sumSuWinding); + } + SkOpAngle* nextAngle = angle->next(); + const SkOpAngle* foundAngle = nullptr; + bool foundDone = false; + // iterate through the angle, and compute everyone's winding + SkOpSegment* nextSegment; + int activeCount = 0; + do { + nextSegment = nextAngle->segment(); + bool activeAngle = nextSegment->activeOp(xorMiMask, xorSuMask, nextAngle->start(), + nextAngle->end(), op, &sumMiWinding, &sumSuWinding); + if (activeAngle) { + ++activeCount; + if (!foundAngle || (foundDone && activeCount & 1)) { + foundAngle = nextAngle; + foundDone = nextSegment->done(nextAngle); + } + } + if (nextSegment->done()) { + continue; + } + if (!activeAngle) { + (void) nextSegment->markAndChaseDone(nextAngle->start(), nextAngle->end(), nullptr); + } + SkOpSpanBase* last = nextAngle->lastMarked(); + if (last) { + SkASSERT(!SkPathOpsDebug::ChaseContains(*chase, last)); + *chase->append() = last; +#if DEBUG_WINDING + SkDebugf("%s chase.append segment=%d span=%d", __FUNCTION__, + last->segment()->debugID(), last->debugID()); + if (!last->final()) { + SkDebugf(" windSum=%d", last->upCast()->windSum()); + } + SkDebugf("\n"); +#endif + } + } while ((nextAngle = nextAngle->next()) != angle); + start->segment()->markDone(start->starter(end)); + if (!foundAngle) { + return nullptr; + } + *nextStart = foundAngle->start(); + *nextEnd = foundAngle->end(); + nextSegment = foundAngle->segment(); +#if DEBUG_WINDING + SkDebugf("%s from:[%d] to:[%d] start=%p end=%p\n", + __FUNCTION__, debugID(), nextSegment->debugID(), *nextStart, *nextEnd); + #endif + return nextSegment; +} + +SkOpSegment* SkOpSegment::findNextWinding(SkTDArray* chase, + SkOpSpanBase** nextStart, SkOpSpanBase** nextEnd, bool* unsortable) { + SkOpSpanBase* start = *nextStart; + SkOpSpanBase* end = *nextEnd; + SkASSERT(start != end); + int step = start->step(end); + SkOpSegment* other = this->isSimple(nextStart, &step); // advances nextStart + if (other) { + // mark the smaller of startIndex, endIndex done, and all adjacent + // spans with the same T value (but not 'other' spans) +#if DEBUG_WINDING + SkDebugf("%s simple\n", __FUNCTION__); +#endif + SkOpSpan* startSpan = start->starter(end); + if (startSpan->done()) { + return nullptr; + } + markDone(startSpan); + *nextEnd = step > 0 ? (*nextStart)->upCast()->next() : (*nextStart)->prev(); + return other; + } + SkOpSpanBase* endNear = step > 0 ? (*nextStart)->upCast()->next() : (*nextStart)->prev(); + SkASSERT(endNear == end); // is this ever not end? + SkASSERT(endNear); + SkASSERT(start != endNear); + SkASSERT((start->t() < endNear->t()) ^ (step < 0)); + // more than one viable candidate -- measure angles to find best + int calcWinding = computeSum(start, endNear, SkOpAngle::kUnaryWinding); + bool sortable = calcWinding != SK_NaN32; + if (!sortable) { + *unsortable = true; + markDone(start->starter(end)); + return nullptr; + } + SkOpAngle* angle = this->spanToAngle(end, start); + if (angle->unorderable()) { + *unsortable = true; + markDone(start->starter(end)); + return nullptr; + } +#if DEBUG_SORT + SkDebugf("%s\n", __FUNCTION__); + angle->debugLoop(); +#endif + int sumWinding = updateWinding(end, start); + SkOpAngle* nextAngle = angle->next(); + const SkOpAngle* foundAngle = nullptr; + bool foundDone = false; + // iterate through the angle, and compute everyone's winding + SkOpSegment* nextSegment; + int activeCount = 0; + do { + nextSegment = nextAngle->segment(); + bool activeAngle = nextSegment->activeWinding(nextAngle->start(), nextAngle->end(), + &sumWinding); + if (activeAngle) { + ++activeCount; + if (!foundAngle || (foundDone && activeCount & 1)) { + foundAngle = nextAngle; + foundDone = nextSegment->done(nextAngle); + } + } + if (nextSegment->done()) { + continue; + } + if (!activeAngle) { + (void) nextSegment->markAndChaseDone(nextAngle->start(), nextAngle->end(), nullptr); + } + SkOpSpanBase* last = nextAngle->lastMarked(); + if (last) { + SkASSERT(!SkPathOpsDebug::ChaseContains(*chase, last)); + *chase->append() = last; +#if DEBUG_WINDING + SkDebugf("%s chase.append segment=%d span=%d", __FUNCTION__, + last->segment()->debugID(), last->debugID()); + if (!last->final()) { + SkDebugf(" windSum=%d", last->upCast()->windSum()); + } + SkDebugf("\n"); +#endif + } + } while ((nextAngle = nextAngle->next()) != angle); + start->segment()->markDone(start->starter(end)); + if (!foundAngle) { + return nullptr; + } + *nextStart = foundAngle->start(); + *nextEnd = foundAngle->end(); + nextSegment = foundAngle->segment(); +#if DEBUG_WINDING + SkDebugf("%s from:[%d] to:[%d] start=%p end=%p\n", + __FUNCTION__, debugID(), nextSegment->debugID(), *nextStart, *nextEnd); + #endif + return nextSegment; +} + +SkOpSegment* SkOpSegment::findNextXor(SkOpSpanBase** nextStart, SkOpSpanBase** nextEnd, + bool* unsortable) { + SkOpSpanBase* start = *nextStart; + SkOpSpanBase* end = *nextEnd; + SkASSERT(start != end); + int step = start->step(end); + SkOpSegment* other = this->isSimple(nextStart, &step); // advances nextStart + if (other) { + // mark the smaller of startIndex, endIndex done, and all adjacent + // spans with the same T value (but not 'other' spans) +#if DEBUG_WINDING + SkDebugf("%s simple\n", __FUNCTION__); +#endif + SkOpSpan* startSpan = start->starter(end); + if (startSpan->done()) { + return nullptr; + } + markDone(startSpan); + *nextEnd = step > 0 ? (*nextStart)->upCast()->next() : (*nextStart)->prev(); + return other; + } + SkDEBUGCODE(SkOpSpanBase* endNear = step > 0 ? (*nextStart)->upCast()->next() \ + : (*nextStart)->prev()); + SkASSERT(endNear == end); // is this ever not end? + SkASSERT(endNear); + SkASSERT(start != endNear); + SkASSERT((start->t() < endNear->t()) ^ (step < 0)); + SkOpAngle* angle = this->spanToAngle(end, start); + if (!angle || angle->unorderable()) { + *unsortable = true; + markDone(start->starter(end)); + return nullptr; + } +#if DEBUG_SORT + SkDebugf("%s\n", __FUNCTION__); + angle->debugLoop(); +#endif + SkOpAngle* nextAngle = angle->next(); + const SkOpAngle* foundAngle = nullptr; + bool foundDone = false; + // iterate through the angle, and compute everyone's winding + SkOpSegment* nextSegment; + int activeCount = 0; + do { + if (!nextAngle) { + return nullptr; + } + nextSegment = nextAngle->segment(); + ++activeCount; + if (!foundAngle || (foundDone && activeCount & 1)) { + foundAngle = nextAngle; + if (!(foundDone = nextSegment->done(nextAngle))) { + break; + } + } + nextAngle = nextAngle->next(); + } while (nextAngle != angle); + start->segment()->markDone(start->starter(end)); + if (!foundAngle) { + return nullptr; + } + *nextStart = foundAngle->start(); + *nextEnd = foundAngle->end(); + nextSegment = foundAngle->segment(); +#if DEBUG_WINDING + SkDebugf("%s from:[%d] to:[%d] start=%p end=%p\n", + __FUNCTION__, debugID(), nextSegment->debugID(), *nextStart, *nextEnd); + #endif + return nextSegment; +} + +SkOpGlobalState* SkOpSegment::globalState() const { + return contour()->globalState(); +} + +void SkOpSegment::init(SkPoint pts[], SkScalar weight, SkOpContour* contour, SkPath::Verb verb) { + fContour = contour; + fNext = nullptr; + fPts = pts; + fWeight = weight; + fVerb = verb; + fCount = 0; + fDoneCount = 0; + fVisited = false; + SkOpSpan* zeroSpan = &fHead; + zeroSpan->init(this, nullptr, 0, fPts[0]); + SkOpSpanBase* oneSpan = &fTail; + zeroSpan->setNext(oneSpan); + oneSpan->initBase(this, zeroSpan, 1, fPts[SkPathOpsVerbToPoints(fVerb)]); + SkDEBUGCODE(fID = globalState()->nextSegmentID()); +} + +bool SkOpSegment::isClose(double t, const SkOpSegment* opp) const { + SkDPoint cPt = this->dPtAtT(t); + SkDVector dxdy = (*CurveDSlopeAtT[this->verb()])(this->pts(), this->weight(), t); + SkDLine perp = {{ cPt, {cPt.fX + dxdy.fY, cPt.fY - dxdy.fX} }}; + SkIntersections i; + (*CurveIntersectRay[opp->verb()])(opp->pts(), opp->weight(), perp, &i); + int used = i.used(); + for (int index = 0; index < used; ++index) { + if (cPt.roughlyEqual(i.pt(index))) { + return true; + } + } + return false; +} + +bool SkOpSegment::isXor() const { + return fContour->isXor(); +} + +void SkOpSegment::markAllDone() { + SkOpSpan* span = this->head(); + do { + this->markDone(span); + } while ((span = span->next()->upCastable())); +} + + bool SkOpSegment::markAndChaseDone(SkOpSpanBase* start, SkOpSpanBase* end, SkOpSpanBase** found) { + int step = start->step(end); + SkOpSpan* minSpan = start->starter(end); + markDone(minSpan); + SkOpSpanBase* last = nullptr; + SkOpSegment* other = this; + SkOpSpan* priorDone = nullptr; + SkOpSpan* lastDone = nullptr; + int safetyNet = 100000; + while ((other = other->nextChase(&start, &step, &minSpan, &last))) { + if (!--safetyNet) { + return false; + } + if (other->done()) { + SkASSERT(!last); + break; + } + if (lastDone == minSpan || priorDone == minSpan) { + if (found) { + *found = nullptr; + } + return true; + } + other->markDone(minSpan); + priorDone = lastDone; + lastDone = minSpan; + } + if (found) { + *found = last; + } + return true; +} + +bool SkOpSegment::markAndChaseWinding(SkOpSpanBase* start, SkOpSpanBase* end, int winding, + SkOpSpanBase** lastPtr) { + SkOpSpan* spanStart = start->starter(end); + int step = start->step(end); + bool success = markWinding(spanStart, winding); + SkOpSpanBase* last = nullptr; + SkOpSegment* other = this; + int safetyNet = 100000; + while ((other = other->nextChase(&start, &step, &spanStart, &last))) { + if (!--safetyNet) { + return false; + } + if (spanStart->windSum() != SK_MinS32) { +// SkASSERT(spanStart->windSum() == winding); // FIXME: is this assert too aggressive? + SkASSERT(!last); + break; + } + (void) other->markWinding(spanStart, winding); + } + if (lastPtr) { + *lastPtr = last; + } + return success; +} + +bool SkOpSegment::markAndChaseWinding(SkOpSpanBase* start, SkOpSpanBase* end, + int winding, int oppWinding, SkOpSpanBase** lastPtr) { + SkOpSpan* spanStart = start->starter(end); + int step = start->step(end); + bool success = markWinding(spanStart, winding, oppWinding); + SkOpSpanBase* last = nullptr; + SkOpSegment* other = this; + int safetyNet = 100000; + while ((other = other->nextChase(&start, &step, &spanStart, &last))) { + if (!--safetyNet) { + return false; + } + if (spanStart->windSum() != SK_MinS32) { + if (this->operand() == other->operand()) { + if (spanStart->windSum() != winding || spanStart->oppSum() != oppWinding) { + this->globalState()->setWindingFailed(); + return true; // ... but let it succeed anyway + } + } else { + FAIL_IF(spanStart->windSum() != oppWinding); + FAIL_IF(spanStart->oppSum() != winding); + } + SkASSERT(!last); + break; + } + if (this->operand() == other->operand()) { + (void) other->markWinding(spanStart, winding, oppWinding); + } else { + (void) other->markWinding(spanStart, oppWinding, winding); + } + } + if (lastPtr) { + *lastPtr = last; + } + return success; +} + +bool SkOpSegment::markAngle(int maxWinding, int sumWinding, const SkOpAngle* angle, + SkOpSpanBase** result) { + SkASSERT(angle->segment() == this); + if (UseInnerWinding(maxWinding, sumWinding)) { + maxWinding = sumWinding; + } + if (!markAndChaseWinding(angle->start(), angle->end(), maxWinding, result)) { + return false; + } +#if DEBUG_WINDING + SkOpSpanBase* last = *result; + if (last) { + SkDebugf("%s last seg=%d span=%d", __FUNCTION__, + last->segment()->debugID(), last->debugID()); + if (!last->final()) { + SkDebugf(" windSum="); + SkPathOpsDebug::WindingPrintf(last->upCast()->windSum()); + } + SkDebugf("\n"); + } +#endif + return true; +} + +bool SkOpSegment::markAngle(int maxWinding, int sumWinding, int oppMaxWinding, + int oppSumWinding, const SkOpAngle* angle, SkOpSpanBase** result) { + SkASSERT(angle->segment() == this); + if (UseInnerWinding(maxWinding, sumWinding)) { + maxWinding = sumWinding; + } + if (oppMaxWinding != oppSumWinding && UseInnerWinding(oppMaxWinding, oppSumWinding)) { + oppMaxWinding = oppSumWinding; + } + // caller doesn't require that this marks anything + if (!markAndChaseWinding(angle->start(), angle->end(), maxWinding, oppMaxWinding, result)) { + return false; + } +#if DEBUG_WINDING + if (result) { + SkOpSpanBase* last = *result; + if (last) { + SkDebugf("%s last segment=%d span=%d", __FUNCTION__, + last->segment()->debugID(), last->debugID()); + if (!last->final()) { + SkDebugf(" windSum="); + SkPathOpsDebug::WindingPrintf(last->upCast()->windSum()); + } + SkDebugf(" \n"); + } + } +#endif + return true; +} + +void SkOpSegment::markDone(SkOpSpan* span) { + SkASSERT(this == span->segment()); + if (span->done()) { + return; + } +#if DEBUG_MARK_DONE + debugShowNewWinding(__FUNCTION__, span, span->windSum(), span->oppSum()); +#endif + span->setDone(true); + ++fDoneCount; + debugValidate(); +} + +bool SkOpSegment::markWinding(SkOpSpan* span, int winding) { + SkASSERT(this == span->segment()); + SkASSERT(winding); + if (span->done()) { + return false; + } +#if DEBUG_MARK_DONE + debugShowNewWinding(__FUNCTION__, span, winding); +#endif + span->setWindSum(winding); + debugValidate(); + return true; +} + +bool SkOpSegment::markWinding(SkOpSpan* span, int winding, int oppWinding) { + SkASSERT(this == span->segment()); + SkASSERT(winding || oppWinding); + if (span->done()) { + return false; + } +#if DEBUG_MARK_DONE + debugShowNewWinding(__FUNCTION__, span, winding, oppWinding); +#endif + span->setWindSum(winding); + span->setOppSum(oppWinding); + debugValidate(); + return true; +} + +bool SkOpSegment::match(const SkOpPtT* base, const SkOpSegment* testParent, double testT, + const SkPoint& testPt) const { + SkASSERT(this == base->segment()); + if (this == testParent) { + if (precisely_equal(base->fT, testT)) { + return true; + } + } + if (!SkDPoint::ApproximatelyEqual(testPt, base->fPt)) { + return false; + } + return this != testParent || !this->ptsDisjoint(base->fT, base->fPt, testT, testPt); +} + +static SkOpSegment* set_last(SkOpSpanBase** last, SkOpSpanBase* endSpan) { + if (last) { + *last = endSpan; + } + return nullptr; +} + +SkOpSegment* SkOpSegment::nextChase(SkOpSpanBase** startPtr, int* stepPtr, SkOpSpan** minPtr, + SkOpSpanBase** last) const { + SkOpSpanBase* origStart = *startPtr; + int step = *stepPtr; + SkOpSpanBase* endSpan = step > 0 ? origStart->upCast()->next() : origStart->prev(); + SkASSERT(endSpan); + SkOpAngle* angle = step > 0 ? endSpan->fromAngle() : endSpan->upCast()->toAngle(); + SkOpSpanBase* foundSpan; + SkOpSpanBase* otherEnd; + SkOpSegment* other; + if (angle == nullptr) { + if (endSpan->t() != 0 && endSpan->t() != 1) { + return nullptr; + } + SkOpPtT* otherPtT = endSpan->ptT()->next(); + other = otherPtT->segment(); + foundSpan = otherPtT->span(); + otherEnd = step > 0 + ? foundSpan->upCastable() ? foundSpan->upCast()->next() : nullptr + : foundSpan->prev(); + } else { + int loopCount = angle->loopCount(); + if (loopCount > 2) { + return set_last(last, endSpan); + } + const SkOpAngle* next = angle->next(); + if (nullptr == next) { + return nullptr; + } +#if DEBUG_WINDING + if (angle->debugSign() != next->debugSign() && !angle->segment()->contour()->isXor() + && !next->segment()->contour()->isXor()) { + SkDebugf("%s mismatched signs\n", __FUNCTION__); + } +#endif + other = next->segment(); + foundSpan = endSpan = next->start(); + otherEnd = next->end(); + } + if (!otherEnd) { + return nullptr; + } + int foundStep = foundSpan->step(otherEnd); + if (*stepPtr != foundStep) { + return set_last(last, endSpan); + } + SkASSERT(*startPtr); +// SkASSERT(otherEnd >= 0); + SkOpSpan* origMin = step < 0 ? origStart->prev() : origStart->upCast(); + SkOpSpan* foundMin = foundSpan->starter(otherEnd); + if (foundMin->windValue() != origMin->windValue() + || foundMin->oppValue() != origMin->oppValue()) { + return set_last(last, endSpan); + } + *startPtr = foundSpan; + *stepPtr = foundStep; + if (minPtr) { + *minPtr = foundMin; + } + return other; +} + +// Please keep this in sync with DebugClearVisited() +void SkOpSegment::ClearVisited(SkOpSpanBase* span) { + // reset visited flag back to false + do { + SkOpPtT* ptT = span->ptT(), * stopPtT = ptT; + while ((ptT = ptT->next()) != stopPtT) { + SkOpSegment* opp = ptT->segment(); + opp->resetVisited(); + } + } while (!span->final() && (span = span->upCast()->next())); +} + +// Please keep this in sync with debugMissingCoincidence() +// look for pairs of undetected coincident curves +// assumes that segments going in have visited flag clear +// Even though pairs of curves correct detect coincident runs, a run may be missed +// if the coincidence is a product of multiple intersections. For instance, given +// curves A, B, and C: +// A-B intersect at a point 1; A-C and B-C intersect at point 2, so near +// the end of C that the intersection is replaced with the end of C. +// Even though A-B correctly do not detect an intersection at point 2, +// the resulting run from point 1 to point 2 is coincident on A and B. +bool SkOpSegment::missingCoincidence() { + if (this->done()) { + return false; + } + SkOpSpan* prior = nullptr; + SkOpSpanBase* spanBase = &fHead; + bool result = false; + int safetyNet = 100000; + do { + SkOpPtT* ptT = spanBase->ptT(), * spanStopPtT = ptT; + SkOPASSERT(ptT->span() == spanBase); + while ((ptT = ptT->next()) != spanStopPtT) { + if (!--safetyNet) { + return false; + } + if (ptT->deleted()) { + continue; + } + SkOpSegment* opp = ptT->span()->segment(); + if (opp->done()) { + continue; + } + // when opp is encounted the 1st time, continue; on 2nd encounter, look for coincidence + if (!opp->visited()) { + continue; + } + if (spanBase == &fHead) { + continue; + } + if (ptT->segment() == this) { + continue; + } + SkOpSpan* span = spanBase->upCastable(); + // FIXME?: this assumes that if the opposite segment is coincident then no more + // coincidence needs to be detected. This may not be true. + if (span && span->containsCoincidence(opp)) { + continue; + } + if (spanBase->containsCoinEnd(opp)) { + continue; + } + SkOpPtT* priorPtT = nullptr, * priorStopPtT; + // find prior span containing opp segment + SkOpSegment* priorOpp = nullptr; + SkOpSpan* priorTest = spanBase->prev(); + while (!priorOpp && priorTest) { + priorStopPtT = priorPtT = priorTest->ptT(); + while ((priorPtT = priorPtT->next()) != priorStopPtT) { + if (priorPtT->deleted()) { + continue; + } + SkOpSegment* segment = priorPtT->span()->segment(); + if (segment == opp) { + prior = priorTest; + priorOpp = opp; + break; + } + } + priorTest = priorTest->prev(); + } + if (!priorOpp) { + continue; + } + if (priorPtT == ptT) { + continue; + } + SkOpPtT* oppStart = prior->ptT(); + SkOpPtT* oppEnd = spanBase->ptT(); + bool swapped = priorPtT->fT > ptT->fT; + if (swapped) { + using std::swap; + swap(priorPtT, ptT); + swap(oppStart, oppEnd); + } + SkOpCoincidence* coincidences = this->globalState()->coincidence(); + SkOpPtT* rootPriorPtT = priorPtT->span()->ptT(); + SkOpPtT* rootPtT = ptT->span()->ptT(); + SkOpPtT* rootOppStart = oppStart->span()->ptT(); + SkOpPtT* rootOppEnd = oppEnd->span()->ptT(); + if (coincidences->contains(rootPriorPtT, rootPtT, rootOppStart, rootOppEnd)) { + goto swapBack; + } + if (this->testForCoincidence(rootPriorPtT, rootPtT, prior, spanBase, opp)) { + // mark coincidence +#if DEBUG_COINCIDENCE_VERBOSE + SkDebugf("%s coinSpan=%d endSpan=%d oppSpan=%d oppEndSpan=%d\n", __FUNCTION__, + rootPriorPtT->debugID(), rootPtT->debugID(), rootOppStart->debugID(), + rootOppEnd->debugID()); +#endif + if (!coincidences->extend(rootPriorPtT, rootPtT, rootOppStart, rootOppEnd)) { + coincidences->add(rootPriorPtT, rootPtT, rootOppStart, rootOppEnd); + } +#if DEBUG_COINCIDENCE + SkASSERT(coincidences->contains(rootPriorPtT, rootPtT, rootOppStart, rootOppEnd)); +#endif + result = true; + } + swapBack: + if (swapped) { + using std::swap; + swap(priorPtT, ptT); + } + } + } while ((spanBase = spanBase->final() ? nullptr : spanBase->upCast()->next())); + ClearVisited(&fHead); + return result; +} + +// please keep this in sync with debugMoveMultiples() +// if a span has more than one intersection, merge the other segments' span as needed +bool SkOpSegment::moveMultiples() { + debugValidate(); + SkOpSpanBase* test = &fHead; + do { + int addCount = test->spanAddsCount(); +// FAIL_IF(addCount < 1); + if (addCount <= 1) { + continue; + } + SkOpPtT* startPtT = test->ptT(); + SkOpPtT* testPtT = startPtT; + int safetyHatch = 1000000; + do { // iterate through all spans associated with start + if (!--safetyHatch) { + return false; + } + SkOpSpanBase* oppSpan = testPtT->span(); + if (oppSpan->spanAddsCount() == addCount) { + continue; + } + if (oppSpan->deleted()) { + continue; + } + SkOpSegment* oppSegment = oppSpan->segment(); + if (oppSegment == this) { + continue; + } + // find range of spans to consider merging + SkOpSpanBase* oppPrev = oppSpan; + SkOpSpanBase* oppFirst = oppSpan; + while ((oppPrev = oppPrev->prev())) { + if (!roughly_equal(oppPrev->t(), oppSpan->t())) { + break; + } + if (oppPrev->spanAddsCount() == addCount) { + continue; + } + if (oppPrev->deleted()) { + continue; + } + oppFirst = oppPrev; + } + SkOpSpanBase* oppNext = oppSpan; + SkOpSpanBase* oppLast = oppSpan; + while ((oppNext = oppNext->final() ? nullptr : oppNext->upCast()->next())) { + if (!roughly_equal(oppNext->t(), oppSpan->t())) { + break; + } + if (oppNext->spanAddsCount() == addCount) { + continue; + } + if (oppNext->deleted()) { + continue; + } + oppLast = oppNext; + } + if (oppFirst == oppLast) { + continue; + } + SkOpSpanBase* oppTest = oppFirst; + do { + if (oppTest == oppSpan) { + continue; + } + // check to see if the candidate meets specific criteria: + // it contains spans of segments in test's loop but not including 'this' + SkOpPtT* oppStartPtT = oppTest->ptT(); + SkOpPtT* oppPtT = oppStartPtT; + while ((oppPtT = oppPtT->next()) != oppStartPtT) { + SkOpSegment* oppPtTSegment = oppPtT->segment(); + if (oppPtTSegment == this) { + goto tryNextSpan; + } + SkOpPtT* matchPtT = startPtT; + do { + if (matchPtT->segment() == oppPtTSegment) { + goto foundMatch; + } + } while ((matchPtT = matchPtT->next()) != startPtT); + goto tryNextSpan; + foundMatch: // merge oppTest and oppSpan + oppSegment->debugValidate(); + oppTest->mergeMatches(oppSpan); + oppTest->addOpp(oppSpan); + oppSegment->debugValidate(); + goto checkNextSpan; + } + tryNextSpan: + ; + } while (oppTest != oppLast && (oppTest = oppTest->upCast()->next())); + } while ((testPtT = testPtT->next()) != startPtT); +checkNextSpan: + ; + } while ((test = test->final() ? nullptr : test->upCast()->next())); + debugValidate(); + return true; +} + +// adjacent spans may have points close by +bool SkOpSegment::spansNearby(const SkOpSpanBase* refSpan, const SkOpSpanBase* checkSpan, + bool* found) const { + const SkOpPtT* refHead = refSpan->ptT(); + const SkOpPtT* checkHead = checkSpan->ptT(); +// if the first pt pair from adjacent spans are far apart, assume that all are far enough apart + if (!SkDPoint::WayRoughlyEqual(refHead->fPt, checkHead->fPt)) { +#if DEBUG_COINCIDENCE + // verify that no combination of points are close + const SkOpPtT* dBugRef = refHead; + do { + const SkOpPtT* dBugCheck = checkHead; + do { + SkOPASSERT(!SkDPoint::ApproximatelyEqual(dBugRef->fPt, dBugCheck->fPt)); + dBugCheck = dBugCheck->next(); + } while (dBugCheck != checkHead); + dBugRef = dBugRef->next(); + } while (dBugRef != refHead); +#endif + *found = false; + return true; + } + // check only unique points + SkScalar distSqBest = SK_ScalarMax; + const SkOpPtT* refBest = nullptr; + const SkOpPtT* checkBest = nullptr; + const SkOpPtT* ref = refHead; + do { + if (ref->deleted()) { + continue; + } + while (ref->ptAlreadySeen(refHead)) { + ref = ref->next(); + if (ref == refHead) { + goto doneCheckingDistance; + } + } + const SkOpPtT* check = checkHead; + const SkOpSegment* refSeg = ref->segment(); + int escapeHatch = 100000; // defend against infinite loops + do { + if (check->deleted()) { + continue; + } + while (check->ptAlreadySeen(checkHead)) { + check = check->next(); + if (check == checkHead) { + goto nextRef; + } + } + SkScalar distSq = SkPointPriv::DistanceToSqd(ref->fPt, check->fPt); + if (distSqBest > distSq && (refSeg != check->segment() + || !refSeg->ptsDisjoint(*ref, *check))) { + distSqBest = distSq; + refBest = ref; + checkBest = check; + } + if (--escapeHatch <= 0) { + return false; + } + } while ((check = check->next()) != checkHead); + nextRef: + ; + } while ((ref = ref->next()) != refHead); +doneCheckingDistance: + *found = checkBest && refBest->segment()->match(refBest, checkBest->segment(), checkBest->fT, + checkBest->fPt); + return true; +} + +// Please keep this function in sync with debugMoveNearby() +// Move nearby t values and pts so they all hang off the same span. Alignment happens later. +bool SkOpSegment::moveNearby() { + debugValidate(); + // release undeleted spans pointing to this seg that are linked to the primary span + SkOpSpanBase* spanBase = &fHead; + int escapeHatch = 9999; // the largest count for a regular test is 50; for a fuzzer, 500 + do { + SkOpPtT* ptT = spanBase->ptT(); + const SkOpPtT* headPtT = ptT; + while ((ptT = ptT->next()) != headPtT) { + if (!--escapeHatch) { + return false; + } + SkOpSpanBase* test = ptT->span(); + if (ptT->segment() == this && !ptT->deleted() && test != spanBase + && test->ptT() == ptT) { + if (test->final()) { + if (spanBase == &fHead) { + this->clearAll(); + return true; + } + spanBase->upCast()->release(ptT); + } else if (test->prev()) { + test->upCast()->release(headPtT); + } + break; + } + } + spanBase = spanBase->upCast()->next(); + } while (!spanBase->final()); + // This loop looks for adjacent spans which are near by + spanBase = &fHead; + do { // iterate through all spans associated with start + SkOpSpanBase* test = spanBase->upCast()->next(); + bool found; + if (!this->spansNearby(spanBase, test, &found)) { + return false; + } + if (found) { + if (test->final()) { + if (spanBase->prev()) { + test->merge(spanBase->upCast()); + } else { + this->clearAll(); + return true; + } + } else { + spanBase->merge(test->upCast()); + } + } + spanBase = test; + } while (!spanBase->final()); + debugValidate(); + return true; +} + +bool SkOpSegment::operand() const { + return fContour->operand(); +} + +bool SkOpSegment::oppXor() const { + return fContour->oppXor(); +} + +bool SkOpSegment::ptsDisjoint(double t1, const SkPoint& pt1, double t2, const SkPoint& pt2) const { + if (fVerb == SkPath::kLine_Verb) { + return false; + } + // quads (and cubics) can loop back to nearly a line so that an opposite curve + // hits in two places with very different t values. + // OPTIMIZATION: curves could be preflighted so that, for example, something like + // 'controls contained by ends' could avoid this check for common curves + // 'ends are extremes in x or y' is cheaper to compute and real-world common + // on the other hand, the below check is relatively inexpensive + double midT = (t1 + t2) / 2; + SkPoint midPt = this->ptAtT(midT); + double seDistSq = std::max(SkPointPriv::DistanceToSqd(pt1, pt2) * 2, FLT_EPSILON * 2); + return SkPointPriv::DistanceToSqd(midPt, pt1) > seDistSq || + SkPointPriv::DistanceToSqd(midPt, pt2) > seDistSq; +} + +void SkOpSegment::setUpWindings(SkOpSpanBase* start, SkOpSpanBase* end, int* sumMiWinding, + int* maxWinding, int* sumWinding) { + int deltaSum = SpanSign(start, end); + *maxWinding = *sumMiWinding; + *sumWinding = *sumMiWinding -= deltaSum; + SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(*sumWinding) <= DEBUG_LIMIT_WIND_SUM); +} + +void SkOpSegment::setUpWindings(SkOpSpanBase* start, SkOpSpanBase* end, int* sumMiWinding, + int* sumSuWinding, int* maxWinding, int* sumWinding, int* oppMaxWinding, + int* oppSumWinding) { + int deltaSum = SpanSign(start, end); + int oppDeltaSum = OppSign(start, end); + if (operand()) { + *maxWinding = *sumSuWinding; + *sumWinding = *sumSuWinding -= deltaSum; + *oppMaxWinding = *sumMiWinding; + *oppSumWinding = *sumMiWinding -= oppDeltaSum; + } else { + *maxWinding = *sumMiWinding; + *sumWinding = *sumMiWinding -= deltaSum; + *oppMaxWinding = *sumSuWinding; + *oppSumWinding = *sumSuWinding -= oppDeltaSum; + } + SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(*sumWinding) <= DEBUG_LIMIT_WIND_SUM); + SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(*oppSumWinding) <= DEBUG_LIMIT_WIND_SUM); +} + +bool SkOpSegment::sortAngles() { + SkOpSpanBase* span = &this->fHead; + do { + SkOpAngle* fromAngle = span->fromAngle(); + SkOpAngle* toAngle = span->final() ? nullptr : span->upCast()->toAngle(); + if (!fromAngle && !toAngle) { + continue; + } +#if DEBUG_ANGLE + bool wroteAfterHeader = false; +#endif + SkOpAngle* baseAngle = fromAngle; + if (fromAngle && toAngle) { +#if DEBUG_ANGLE + SkDebugf("%s [%d] tStart=%1.9g [%d]\n", __FUNCTION__, debugID(), span->t(), + span->debugID()); + wroteAfterHeader = true; +#endif + FAIL_IF(!fromAngle->insert(toAngle)); + } else if (!fromAngle) { + baseAngle = toAngle; + } + SkOpPtT* ptT = span->ptT(), * stopPtT = ptT; + int safetyNet = 1000000; + do { + if (!--safetyNet) { + return false; + } + SkOpSpanBase* oSpan = ptT->span(); + if (oSpan == span) { + continue; + } + SkOpAngle* oAngle = oSpan->fromAngle(); + if (oAngle) { +#if DEBUG_ANGLE + if (!wroteAfterHeader) { + SkDebugf("%s [%d] tStart=%1.9g [%d]\n", __FUNCTION__, debugID(), + span->t(), span->debugID()); + wroteAfterHeader = true; + } +#endif + if (!oAngle->loopContains(baseAngle)) { + baseAngle->insert(oAngle); + } + } + if (!oSpan->final()) { + oAngle = oSpan->upCast()->toAngle(); + if (oAngle) { +#if DEBUG_ANGLE + if (!wroteAfterHeader) { + SkDebugf("%s [%d] tStart=%1.9g [%d]\n", __FUNCTION__, debugID(), + span->t(), span->debugID()); + wroteAfterHeader = true; + } +#endif + if (!oAngle->loopContains(baseAngle)) { + baseAngle->insert(oAngle); + } + } + } + } while ((ptT = ptT->next()) != stopPtT); + if (baseAngle->loopCount() == 1) { + span->setFromAngle(nullptr); + if (toAngle) { + span->upCast()->setToAngle(nullptr); + } + baseAngle = nullptr; + } +#if DEBUG_SORT + SkASSERT(!baseAngle || baseAngle->loopCount() > 1); +#endif + } while (!span->final() && (span = span->upCast()->next())); + return true; +} + +bool SkOpSegment::subDivide(const SkOpSpanBase* start, const SkOpSpanBase* end, + SkDCurve* edge) const { + SkASSERT(start != end); + const SkOpPtT& startPtT = *start->ptT(); + const SkOpPtT& endPtT = *end->ptT(); + SkDEBUGCODE(edge->fVerb = fVerb); + edge->fCubic[0].set(startPtT.fPt); + int points = SkPathOpsVerbToPoints(fVerb); + edge->fCubic[points].set(endPtT.fPt); + if (fVerb == SkPath::kLine_Verb) { + return false; + } + double startT = startPtT.fT; + double endT = endPtT.fT; + if ((startT == 0 || endT == 0) && (startT == 1 || endT == 1)) { + // don't compute midpoints if we already have them + if (fVerb == SkPath::kQuad_Verb) { + edge->fLine[1].set(fPts[1]); + return false; + } + if (fVerb == SkPath::kConic_Verb) { + edge->fConic[1].set(fPts[1]); + edge->fConic.fWeight = fWeight; + return false; + } + SkASSERT(fVerb == SkPath::kCubic_Verb); + if (startT == 0) { + edge->fCubic[1].set(fPts[1]); + edge->fCubic[2].set(fPts[2]); + return false; + } + edge->fCubic[1].set(fPts[2]); + edge->fCubic[2].set(fPts[1]); + return false; + } + if (fVerb == SkPath::kQuad_Verb) { + edge->fQuad[1] = SkDQuad::SubDivide(fPts, edge->fQuad[0], edge->fQuad[2], startT, endT); + } else if (fVerb == SkPath::kConic_Verb) { + edge->fConic[1] = SkDConic::SubDivide(fPts, fWeight, edge->fQuad[0], edge->fQuad[2], + startT, endT, &edge->fConic.fWeight); + } else { + SkASSERT(fVerb == SkPath::kCubic_Verb); + SkDCubic::SubDivide(fPts, edge->fCubic[0], edge->fCubic[3], startT, endT, &edge->fCubic[1]); + } + return true; +} + +bool SkOpSegment::testForCoincidence(const SkOpPtT* priorPtT, const SkOpPtT* ptT, + const SkOpSpanBase* prior, const SkOpSpanBase* spanBase, const SkOpSegment* opp) const { + // average t, find mid pt + double midT = (prior->t() + spanBase->t()) / 2; + SkPoint midPt = this->ptAtT(midT); + bool coincident = true; + // if the mid pt is not near either end pt, project perpendicular through opp seg + if (!SkDPoint::ApproximatelyEqual(priorPtT->fPt, midPt) + && !SkDPoint::ApproximatelyEqual(ptT->fPt, midPt)) { + if (priorPtT->span() == ptT->span()) { + return false; + } + coincident = false; + SkIntersections i; + SkDCurve curvePart; + this->subDivide(prior, spanBase, &curvePart); + SkDVector dxdy = (*CurveDDSlopeAtT[fVerb])(curvePart, 0.5f); + SkDPoint partMidPt = (*CurveDDPointAtT[fVerb])(curvePart, 0.5f); + SkDLine ray = {{{midPt.fX, midPt.fY}, {partMidPt.fX + dxdy.fY, partMidPt.fY - dxdy.fX}}}; + SkDCurve oppPart; + opp->subDivide(priorPtT->span(), ptT->span(), &oppPart); + (*CurveDIntersectRay[opp->verb()])(oppPart, ray, &i); + // measure distance and see if it's small enough to denote coincidence + for (int index = 0; index < i.used(); ++index) { + if (!between(0, i[0][index], 1)) { + continue; + } + SkDPoint oppPt = i.pt(index); + if (oppPt.approximatelyDEqual(midPt)) { + // the coincidence can occur at almost any angle + coincident = true; + } + } + } + return coincident; +} + +SkOpSpan* SkOpSegment::undoneSpan() { + SkOpSpan* span = &fHead; + SkOpSpanBase* next; + do { + next = span->next(); + if (!span->done()) { + return span; + } + } while (!next->final() && (span = next->upCast())); + return nullptr; +} + +int SkOpSegment::updateOppWinding(const SkOpSpanBase* start, const SkOpSpanBase* end) const { + const SkOpSpan* lesser = start->starter(end); + int oppWinding = lesser->oppSum(); + int oppSpanWinding = SkOpSegment::OppSign(start, end); + if (oppSpanWinding && UseInnerWinding(oppWinding - oppSpanWinding, oppWinding) + && oppWinding != SK_MaxS32) { + oppWinding -= oppSpanWinding; + } + return oppWinding; +} + +int SkOpSegment::updateOppWinding(const SkOpAngle* angle) const { + const SkOpSpanBase* startSpan = angle->start(); + const SkOpSpanBase* endSpan = angle->end(); + return updateOppWinding(endSpan, startSpan); +} + +int SkOpSegment::updateOppWindingReverse(const SkOpAngle* angle) const { + const SkOpSpanBase* startSpan = angle->start(); + const SkOpSpanBase* endSpan = angle->end(); + return updateOppWinding(startSpan, endSpan); +} + +int SkOpSegment::updateWinding(SkOpSpanBase* start, SkOpSpanBase* end) { + SkOpSpan* lesser = start->starter(end); + int winding = lesser->windSum(); + if (winding == SK_MinS32) { + winding = lesser->computeWindSum(); + } + if (winding == SK_MinS32) { + return winding; + } + int spanWinding = SkOpSegment::SpanSign(start, end); + if (winding && UseInnerWinding(winding - spanWinding, winding) + && winding != SK_MaxS32) { + winding -= spanWinding; + } + return winding; +} + +int SkOpSegment::updateWinding(SkOpAngle* angle) { + SkOpSpanBase* startSpan = angle->start(); + SkOpSpanBase* endSpan = angle->end(); + return updateWinding(endSpan, startSpan); +} + +int SkOpSegment::updateWindingReverse(const SkOpAngle* angle) { + SkOpSpanBase* startSpan = angle->start(); + SkOpSpanBase* endSpan = angle->end(); + return updateWinding(startSpan, endSpan); +} + +// OPTIMIZATION: does the following also work, and is it any faster? +// return outerWinding * innerWinding > 0 +// || ((outerWinding + innerWinding < 0) ^ ((outerWinding - innerWinding) < 0))) +bool SkOpSegment::UseInnerWinding(int outerWinding, int innerWinding) { + SkASSERT(outerWinding != SK_MaxS32); + SkASSERT(innerWinding != SK_MaxS32); + int absOut = SkTAbs(outerWinding); + int absIn = SkTAbs(innerWinding); + bool result = absOut == absIn ? outerWinding < 0 : absOut < absIn; + return result; +} + +int SkOpSegment::windSum(const SkOpAngle* angle) const { + const SkOpSpan* minSpan = angle->start()->starter(angle->end()); + return minSpan->windSum(); +} diff --git a/gfx/skia/skia/src/pathops/SkOpSegment.h b/gfx/skia/skia/src/pathops/SkOpSegment.h new file mode 100644 index 0000000000..4da3c5a51f --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpSegment.h @@ -0,0 +1,466 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkOpSegment_DEFINE +#define SkOpSegment_DEFINE + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMath.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkOpAngle.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsBounds.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTypes.h" + +enum class SkOpRayDir; +class SkOpCoincidence; +class SkOpContour; +class SkPathWriter; +struct SkOpRayHit; +template class SkTDArray; + +class SkOpSegment { +public: + bool operator<(const SkOpSegment& rh) const { + return fBounds.fTop < rh.fBounds.fTop; + } + + SkOpAngle* activeAngle(SkOpSpanBase* start, SkOpSpanBase** startPtr, SkOpSpanBase** endPtr, + bool* done); + SkOpAngle* activeAngleInner(SkOpSpanBase* start, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr, bool* done); + SkOpAngle* activeAngleOther(SkOpSpanBase* start, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr, bool* done); + bool activeOp(SkOpSpanBase* start, SkOpSpanBase* end, int xorMiMask, int xorSuMask, + SkPathOp op); + bool activeOp(int xorMiMask, int xorSuMask, SkOpSpanBase* start, SkOpSpanBase* end, SkPathOp op, + int* sumMiWinding, int* sumSuWinding); + + bool activeWinding(SkOpSpanBase* start, SkOpSpanBase* end); + bool activeWinding(SkOpSpanBase* start, SkOpSpanBase* end, int* sumWinding); + + SkOpSegment* addConic(SkPoint pts[3], SkScalar weight, SkOpContour* parent) { + init(pts, weight, parent, SkPath::kConic_Verb); + SkDCurve curve; + curve.fConic.set(pts, weight); + curve.setConicBounds(pts, weight, 0, 1, &fBounds); + return this; + } + + SkOpSegment* addCubic(SkPoint pts[4], SkOpContour* parent) { + init(pts, 1, parent, SkPath::kCubic_Verb); + SkDCurve curve; + curve.fCubic.set(pts); + curve.setCubicBounds(pts, 1, 0, 1, &fBounds); + return this; + } + + bool addCurveTo(const SkOpSpanBase* start, const SkOpSpanBase* end, SkPathWriter* path) const; + + SkOpAngle* addEndSpan() { + SkOpAngle* angle = this->globalState()->allocator()->make(); + angle->set(&fTail, fTail.prev()); + fTail.setFromAngle(angle); + return angle; + } + + bool addExpanded(double newT, const SkOpSpanBase* test, bool* startOver); + + SkOpSegment* addLine(SkPoint pts[2], SkOpContour* parent) { + SkASSERT(pts[0] != pts[1]); + init(pts, 1, parent, SkPath::kLine_Verb); + fBounds.setBounds(pts, 2); + return this; + } + + SkOpPtT* addMissing(double t, SkOpSegment* opp, bool* allExist); + + SkOpAngle* addStartSpan() { + SkOpAngle* angle = this->globalState()->allocator()->make(); + angle->set(&fHead, fHead.next()); + fHead.setToAngle(angle); + return angle; + } + + SkOpSegment* addQuad(SkPoint pts[3], SkOpContour* parent) { + init(pts, 1, parent, SkPath::kQuad_Verb); + SkDCurve curve; + curve.fQuad.set(pts); + curve.setQuadBounds(pts, 1, 0, 1, &fBounds); + return this; + } + + SkOpPtT* addT(double t); + SkOpPtT* addT(double t, const SkPoint& pt); + + const SkPathOpsBounds& bounds() const { + return fBounds; + } + + void bumpCount() { + ++fCount; + } + + void calcAngles(); + SkOpSpanBase::Collapsed collapsed(double startT, double endT) const; + static bool ComputeOneSum(const SkOpAngle* baseAngle, SkOpAngle* nextAngle, + SkOpAngle::IncludeType ); + static bool ComputeOneSumReverse(SkOpAngle* baseAngle, SkOpAngle* nextAngle, + SkOpAngle::IncludeType ); + int computeSum(SkOpSpanBase* start, SkOpSpanBase* end, SkOpAngle::IncludeType includeType); + + void clearAll(); + void clearOne(SkOpSpan* span); + static void ClearVisited(SkOpSpanBase* span); + bool contains(double t) const; + + SkOpContour* contour() const { + return fContour; + } + + int count() const { + return fCount; + } + + void debugAddAngle(double startT, double endT); +#if DEBUG_COIN + const SkOpPtT* debugAddT(double t, SkPathOpsDebug::GlitchLog* ) const; +#endif + const SkOpAngle* debugAngle(int id) const; +#if DEBUG_ANGLE + void debugCheckAngleCoin() const; +#endif +#if DEBUG_COIN + void debugCheckHealth(SkPathOpsDebug::GlitchLog* ) const; + void debugClearAll(SkPathOpsDebug::GlitchLog* glitches) const; + void debugClearOne(const SkOpSpan* span, SkPathOpsDebug::GlitchLog* glitches) const; +#endif + const SkOpCoincidence* debugCoincidence() const; + SkOpContour* debugContour(int id) const; + + int debugID() const { + return SkDEBUGRELEASE(fID, -1); + } + + SkOpAngle* debugLastAngle(); +#if DEBUG_COIN + void debugMissingCoincidence(SkPathOpsDebug::GlitchLog* glitches) const; + void debugMoveMultiples(SkPathOpsDebug::GlitchLog* glitches) const; + void debugMoveNearby(SkPathOpsDebug::GlitchLog* glitches) const; +#endif + const SkOpPtT* debugPtT(int id) const; + void debugReset(); + const SkOpSegment* debugSegment(int id) const; + +#if DEBUG_ACTIVE_SPANS + void debugShowActiveSpans(SkString* str) const; +#endif +#if DEBUG_MARK_DONE + void debugShowNewWinding(const char* fun, const SkOpSpan* span, int winding); + void debugShowNewWinding(const char* fun, const SkOpSpan* span, int winding, int oppWinding); +#endif + + const SkOpSpanBase* debugSpan(int id) const; + void debugValidate() const; + +#if DEBUG_COINCIDENCE_ORDER + void debugResetCoinT() const; + void debugSetCoinT(int, SkScalar ) const; +#endif + +#if DEBUG_COIN + static void DebugClearVisited(const SkOpSpanBase* span); + + bool debugVisited() const { + if (!fDebugVisited) { + fDebugVisited = true; + return false; + } + return true; + } +#endif + +#if DEBUG_ANGLE + double distSq(double t, const SkOpAngle* opp) const; +#endif + + bool done() const { + SkOPASSERT(fDoneCount <= fCount); + return fDoneCount == fCount; + } + + bool done(const SkOpAngle* angle) const { + return angle->start()->starter(angle->end())->done(); + } + + SkDPoint dPtAtT(double mid) const { + return (*CurveDPointAtT[fVerb])(fPts, fWeight, mid); + } + + SkDVector dSlopeAtT(double mid) const { + return (*CurveDSlopeAtT[fVerb])(fPts, fWeight, mid); + } + + void dump() const; + void dumpAll() const; + void dumpAngles() const; + void dumpCoin() const; + void dumpPts(const char* prefix = "seg") const; + void dumpPtsInner(const char* prefix = "seg") const; + + const SkOpPtT* existing(double t, const SkOpSegment* opp) const; + SkOpSegment* findNextOp(SkTDArray* chase, SkOpSpanBase** nextStart, + SkOpSpanBase** nextEnd, bool* unsortable, bool* simple, + SkPathOp op, int xorMiMask, int xorSuMask); + SkOpSegment* findNextWinding(SkTDArray* chase, SkOpSpanBase** nextStart, + SkOpSpanBase** nextEnd, bool* unsortable); + SkOpSegment* findNextXor(SkOpSpanBase** nextStart, SkOpSpanBase** nextEnd, bool* unsortable); + SkOpSpan* findSortableTop(SkOpContour* ); + SkOpGlobalState* globalState() const; + + const SkOpSpan* head() const { + return &fHead; + } + + SkOpSpan* head() { + return &fHead; + } + + void init(SkPoint pts[], SkScalar weight, SkOpContour* parent, SkPath::Verb verb); + + SkOpSpan* insert(SkOpSpan* prev) { + SkOpGlobalState* globalState = this->globalState(); + globalState->setAllocatedOpSpan(); + SkOpSpan* result = globalState->allocator()->make(); + SkOpSpanBase* next = prev->next(); + result->setPrev(prev); + prev->setNext(result); + SkDEBUGCODE(result->ptT()->fT = 0); + result->setNext(next); + if (next) { + next->setPrev(result); + } + return result; + } + + bool isClose(double t, const SkOpSegment* opp) const; + + bool isHorizontal() const { + return fBounds.fTop == fBounds.fBottom; + } + + SkOpSegment* isSimple(SkOpSpanBase** end, int* step) const { + return nextChase(end, step, nullptr, nullptr); + } + + bool isVertical() const { + return fBounds.fLeft == fBounds.fRight; + } + + bool isVertical(SkOpSpanBase* start, SkOpSpanBase* end) const { + return (*CurveIsVertical[fVerb])(fPts, fWeight, start->t(), end->t()); + } + + bool isXor() const; + + void joinEnds(SkOpSegment* start) { + fTail.ptT()->addOpp(start->fHead.ptT(), start->fHead.ptT()); + } + + const SkPoint& lastPt() const { + return fPts[SkPathOpsVerbToPoints(fVerb)]; + } + + void markAllDone(); + bool markAndChaseDone(SkOpSpanBase* start, SkOpSpanBase* end, SkOpSpanBase** found); + bool markAndChaseWinding(SkOpSpanBase* start, SkOpSpanBase* end, int winding, + SkOpSpanBase** lastPtr); + bool markAndChaseWinding(SkOpSpanBase* start, SkOpSpanBase* end, int winding, + int oppWinding, SkOpSpanBase** lastPtr); + bool markAngle(int maxWinding, int sumWinding, const SkOpAngle* angle, SkOpSpanBase** result); + bool markAngle(int maxWinding, int sumWinding, int oppMaxWinding, int oppSumWinding, + const SkOpAngle* angle, SkOpSpanBase** result); + void markDone(SkOpSpan* ); + bool markWinding(SkOpSpan* , int winding); + bool markWinding(SkOpSpan* , int winding, int oppWinding); + bool match(const SkOpPtT* span, const SkOpSegment* parent, double t, const SkPoint& pt) const; + bool missingCoincidence(); + bool moveMultiples(); + bool moveNearby(); + + SkOpSegment* next() const { + return fNext; + } + + SkOpSegment* nextChase(SkOpSpanBase** , int* step, SkOpSpan** , SkOpSpanBase** last) const; + bool operand() const; + + static int OppSign(const SkOpSpanBase* start, const SkOpSpanBase* end) { + int result = start->t() < end->t() ? -start->upCast()->oppValue() + : end->upCast()->oppValue(); + return result; + } + + bool oppXor() const; + + const SkOpSegment* prev() const { + return fPrev; + } + + SkPoint ptAtT(double mid) const { + return (*CurvePointAtT[fVerb])(fPts, fWeight, mid); + } + + const SkPoint* pts() const { + return fPts; + } + + bool ptsDisjoint(const SkOpPtT& span, const SkOpPtT& test) const { + SkASSERT(this == span.segment()); + SkASSERT(this == test.segment()); + return ptsDisjoint(span.fT, span.fPt, test.fT, test.fPt); + } + + bool ptsDisjoint(const SkOpPtT& span, double t, const SkPoint& pt) const { + SkASSERT(this == span.segment()); + return ptsDisjoint(span.fT, span.fPt, t, pt); + } + + bool ptsDisjoint(double t1, const SkPoint& pt1, double t2, const SkPoint& pt2) const; + + void rayCheck(const SkOpRayHit& base, SkOpRayDir dir, SkOpRayHit** hits, SkArenaAlloc*); + void release(const SkOpSpan* ); + +#if DEBUG_COIN + void resetDebugVisited() const { + fDebugVisited = false; + } +#endif + + void resetVisited() { + fVisited = false; + } + + void setContour(SkOpContour* contour) { + fContour = contour; + } + + void setNext(SkOpSegment* next) { + fNext = next; + } + + void setPrev(SkOpSegment* prev) { + fPrev = prev; + } + + void setUpWinding(SkOpSpanBase* start, SkOpSpanBase* end, int* maxWinding, int* sumWinding) { + int deltaSum = SpanSign(start, end); + *maxWinding = *sumWinding; + if (*sumWinding == SK_MinS32) { + return; + } + *sumWinding -= deltaSum; + } + + void setUpWindings(SkOpSpanBase* start, SkOpSpanBase* end, int* sumMiWinding, + int* maxWinding, int* sumWinding); + void setUpWindings(SkOpSpanBase* start, SkOpSpanBase* end, int* sumMiWinding, int* sumSuWinding, + int* maxWinding, int* sumWinding, int* oppMaxWinding, int* oppSumWinding); + bool sortAngles(); + bool spansNearby(const SkOpSpanBase* ref, const SkOpSpanBase* check, bool* found) const; + + static int SpanSign(const SkOpSpanBase* start, const SkOpSpanBase* end) { + int result = start->t() < end->t() ? -start->upCast()->windValue() + : end->upCast()->windValue(); + return result; + } + + SkOpAngle* spanToAngle(SkOpSpanBase* start, SkOpSpanBase* end) { + SkASSERT(start != end); + return start->t() < end->t() ? start->upCast()->toAngle() : start->fromAngle(); + } + + bool subDivide(const SkOpSpanBase* start, const SkOpSpanBase* end, SkDCurve* result) const; + + const SkOpSpanBase* tail() const { + return &fTail; + } + + SkOpSpanBase* tail() { + return &fTail; + } + + bool testForCoincidence(const SkOpPtT* priorPtT, const SkOpPtT* ptT, const SkOpSpanBase* prior, + const SkOpSpanBase* spanBase, const SkOpSegment* opp) const; + + SkOpSpan* undoneSpan(); + int updateOppWinding(const SkOpSpanBase* start, const SkOpSpanBase* end) const; + int updateOppWinding(const SkOpAngle* angle) const; + int updateOppWindingReverse(const SkOpAngle* angle) const; + int updateWinding(SkOpSpanBase* start, SkOpSpanBase* end); + int updateWinding(SkOpAngle* angle); + int updateWindingReverse(const SkOpAngle* angle); + + static bool UseInnerWinding(int outerWinding, int innerWinding); + + SkPath::Verb verb() const { + return fVerb; + } + + // look for two different spans that point to the same opposite segment + bool visited() { + if (!fVisited) { + fVisited = true; + return false; + } + return true; + } + + SkScalar weight() const { + return fWeight; + } + + SkOpSpan* windingSpanAtT(double tHit); + int windSum(const SkOpAngle* angle) const; + +private: + SkOpSpan fHead; // the head span always has its t set to zero + SkOpSpanBase fTail; // the tail span always has its t set to one + SkOpContour* fContour; + SkOpSegment* fNext; // forward-only linked list used by contour to walk the segments + const SkOpSegment* fPrev; + SkPoint* fPts; // pointer into array of points owned by edge builder that may be tweaked + SkPathOpsBounds fBounds; // tight bounds + SkScalar fWeight; + int fCount; // number of spans (one for a non-intersecting segment) + int fDoneCount; // number of processed spans (zero initially) + SkPath::Verb fVerb; + bool fVisited; // used by missing coincidence check +#if DEBUG_COIN + mutable bool fDebugVisited; // used by debug missing coincidence check +#endif +#if DEBUG_COINCIDENCE_ORDER + mutable int fDebugBaseIndex; + mutable SkScalar fDebugBaseMin; // if > 0, the 1st t value in this seg vis-a-vis the ref seg + mutable SkScalar fDebugBaseMax; + mutable int fDebugLastIndex; + mutable SkScalar fDebugLastMin; // if > 0, the last t -- next t val - base has same sign + mutable SkScalar fDebugLastMax; +#endif + SkDEBUGCODE(int fID); +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkOpSpan.cpp b/gfx/skia/skia/src/pathops/SkOpSpan.cpp new file mode 100644 index 0000000000..a7e898915a --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpSpan.cpp @@ -0,0 +1,490 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTemplates.h" +#include "src/pathops/SkOpCoincidence.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include + +bool SkOpPtT::alias() const { + return this->span()->ptT() != this; +} + +const SkOpPtT* SkOpPtT::active() const { + if (!fDeleted) { + return this; + } + const SkOpPtT* ptT = this; + const SkOpPtT* stopPtT = ptT; + while ((ptT = ptT->next()) != stopPtT) { + if (ptT->fSpan == fSpan && !ptT->fDeleted) { + return ptT; + } + } + return nullptr; // should never return deleted; caller must abort +} + +bool SkOpPtT::contains(const SkOpPtT* check) const { + SkOPASSERT(this != check); + const SkOpPtT* ptT = this; + const SkOpPtT* stopPtT = ptT; + while ((ptT = ptT->next()) != stopPtT) { + if (ptT == check) { + return true; + } + } + return false; +} + +bool SkOpPtT::contains(const SkOpSegment* segment, const SkPoint& pt) const { + SkASSERT(this->segment() != segment); + const SkOpPtT* ptT = this; + const SkOpPtT* stopPtT = ptT; + while ((ptT = ptT->next()) != stopPtT) { + if (ptT->fPt == pt && ptT->segment() == segment) { + return true; + } + } + return false; +} + +bool SkOpPtT::contains(const SkOpSegment* segment, double t) const { + const SkOpPtT* ptT = this; + const SkOpPtT* stopPtT = ptT; + while ((ptT = ptT->next()) != stopPtT) { + if (ptT->fT == t && ptT->segment() == segment) { + return true; + } + } + return false; +} + +const SkOpPtT* SkOpPtT::contains(const SkOpSegment* check) const { + SkASSERT(this->segment() != check); + const SkOpPtT* ptT = this; + const SkOpPtT* stopPtT = ptT; + while ((ptT = ptT->next()) != stopPtT) { + if (ptT->segment() == check && !ptT->deleted()) { + return ptT; + } + } + return nullptr; +} + +SkOpContour* SkOpPtT::contour() const { + return segment()->contour(); +} + +const SkOpPtT* SkOpPtT::find(const SkOpSegment* segment) const { + const SkOpPtT* ptT = this; + const SkOpPtT* stopPtT = ptT; + do { + if (ptT->segment() == segment && !ptT->deleted()) { + return ptT; + } + ptT = ptT->fNext; + } while (stopPtT != ptT); +// SkASSERT(0); + return nullptr; +} + +SkOpGlobalState* SkOpPtT::globalState() const { + return contour()->globalState(); +} + +void SkOpPtT::init(SkOpSpanBase* span, double t, const SkPoint& pt, bool duplicate) { + fT = t; + fPt = pt; + fSpan = span; + fNext = this; + fDuplicatePt = duplicate; + fDeleted = false; + fCoincident = false; + SkDEBUGCODE(fID = span->globalState()->nextPtTID()); +} + +bool SkOpPtT::onEnd() const { + const SkOpSpanBase* span = this->span(); + if (span->ptT() != this) { + return false; + } + const SkOpSegment* segment = this->segment(); + return span == segment->head() || span == segment->tail(); +} + +bool SkOpPtT::ptAlreadySeen(const SkOpPtT* check) const { + while (this != check) { + if (this->fPt == check->fPt) { + return true; + } + check = check->fNext; + } + return false; +} + +SkOpPtT* SkOpPtT::prev() { + SkOpPtT* result = this; + SkOpPtT* next = this; + while ((next = next->fNext) != this) { + result = next; + } + SkASSERT(result->fNext == this); + return result; +} + +const SkOpSegment* SkOpPtT::segment() const { + return span()->segment(); +} + +SkOpSegment* SkOpPtT::segment() { + return span()->segment(); +} + +void SkOpPtT::setDeleted() { + SkASSERT(this->span()->debugDeleted() || this->span()->ptT() != this); + SkOPASSERT(!fDeleted); + fDeleted = true; +} + +bool SkOpSpanBase::addOpp(SkOpSpanBase* opp) { + SkOpPtT* oppPrev = this->ptT()->oppPrev(opp->ptT()); + if (!oppPrev) { + return true; + } + FAIL_IF(!this->mergeMatches(opp)); + this->ptT()->addOpp(opp->ptT(), oppPrev); + this->checkForCollapsedCoincidence(); + return true; +} + +SkOpSpanBase::Collapsed SkOpSpanBase::collapsed(double s, double e) const { + const SkOpPtT* start = &fPtT; + const SkOpPtT* startNext = nullptr; + const SkOpPtT* walk = start; + double min = walk->fT; + double max = min; + const SkOpSegment* segment = this->segment(); + int safetyNet = 100000; + while ((walk = walk->next()) != start) { + if (!--safetyNet) { + return Collapsed::kError; + } + if (walk == startNext) { + return Collapsed::kError; + } + if (walk->segment() != segment) { + continue; + } + min = std::min(min, walk->fT); + max = std::max(max, walk->fT); + if (between(min, s, max) && between(min, e, max)) { + return Collapsed::kYes; + } + startNext = start->next(); + } + return Collapsed::kNo; +} + +bool SkOpSpanBase::contains(const SkOpSpanBase* span) const { + const SkOpPtT* start = &fPtT; + const SkOpPtT* check = &span->fPtT; + SkOPASSERT(start != check); + const SkOpPtT* walk = start; + while ((walk = walk->next()) != start) { + if (walk == check) { + return true; + } + } + return false; +} + +const SkOpPtT* SkOpSpanBase::contains(const SkOpSegment* segment) const { + const SkOpPtT* start = &fPtT; + const SkOpPtT* walk = start; + while ((walk = walk->next()) != start) { + if (walk->deleted()) { + continue; + } + if (walk->segment() == segment && walk->span()->ptT() == walk) { + return walk; + } + } + return nullptr; +} + +bool SkOpSpanBase::containsCoinEnd(const SkOpSegment* segment) const { + SkASSERT(this->segment() != segment); + const SkOpSpanBase* next = this; + while ((next = next->fCoinEnd) != this) { + if (next->segment() == segment) { + return true; + } + } + return false; +} + +SkOpContour* SkOpSpanBase::contour() const { + return segment()->contour(); +} + +SkOpGlobalState* SkOpSpanBase::globalState() const { + return contour()->globalState(); +} + +void SkOpSpanBase::initBase(SkOpSegment* segment, SkOpSpan* prev, double t, const SkPoint& pt) { + fSegment = segment; + fPtT.init(this, t, pt, false); + fCoinEnd = this; + fFromAngle = nullptr; + fPrev = prev; + fSpanAdds = 0; + fAligned = true; + fChased = false; + SkDEBUGCODE(fCount = 1); + SkDEBUGCODE(fID = globalState()->nextSpanID()); + SkDEBUGCODE(fDebugDeleted = false); +} + +// this pair of spans share a common t value or point; merge them and eliminate duplicates +// this does not compute the best t or pt value; this merely moves all data into a single list +void SkOpSpanBase::merge(SkOpSpan* span) { + SkOpPtT* spanPtT = span->ptT(); + SkASSERT(this->t() != spanPtT->fT); + SkASSERT(!zero_or_one(spanPtT->fT)); + span->release(this->ptT()); + if (this->contains(span)) { + SkOPASSERT(0); // check to see if this ever happens -- should have been found earlier + return; // merge is already in the ptT loop + } + SkOpPtT* remainder = spanPtT->next(); + this->ptT()->insert(spanPtT); + while (remainder != spanPtT) { + SkOpPtT* next = remainder->next(); + SkOpPtT* compare = spanPtT->next(); + while (compare != spanPtT) { + SkOpPtT* nextC = compare->next(); + if (nextC->span() == remainder->span() && nextC->fT == remainder->fT) { + goto tryNextRemainder; + } + compare = nextC; + } + spanPtT->insert(remainder); +tryNextRemainder: + remainder = next; + } + fSpanAdds += span->fSpanAdds; +} + +// please keep in sync with debugCheckForCollapsedCoincidence() +void SkOpSpanBase::checkForCollapsedCoincidence() { + SkOpCoincidence* coins = this->globalState()->coincidence(); + if (coins->isEmpty()) { + return; + } +// the insert above may have put both ends of a coincident run in the same span +// for each coincident ptT in loop; see if its opposite in is also in the loop +// this implementation is the motivation for marking that a ptT is referenced by a coincident span + SkOpPtT* head = this->ptT(); + SkOpPtT* test = head; + do { + if (!test->coincident()) { + continue; + } + coins->markCollapsed(test); + } while ((test = test->next()) != head); + coins->releaseDeleted(); +} + +// please keep in sync with debugMergeMatches() +// Look to see if pt-t linked list contains same segment more than once +// if so, and if each pt-t is directly pointed to by spans in that segment, +// merge them +// keep the points, but remove spans so that the segment doesn't have 2 or more +// spans pointing to the same pt-t loop at different loop elements +bool SkOpSpanBase::mergeMatches(SkOpSpanBase* opp) { + SkOpPtT* test = &fPtT; + SkOpPtT* testNext; + const SkOpPtT* stop = test; + int safetyHatch = 1000000; + do { + if (!--safetyHatch) { + return false; + } + testNext = test->next(); + if (test->deleted()) { + continue; + } + SkOpSpanBase* testBase = test->span(); + SkASSERT(testBase->ptT() == test); + SkOpSegment* segment = test->segment(); + if (segment->done()) { + continue; + } + SkOpPtT* inner = opp->ptT(); + const SkOpPtT* innerStop = inner; + do { + if (inner->segment() != segment) { + continue; + } + if (inner->deleted()) { + continue; + } + SkOpSpanBase* innerBase = inner->span(); + SkASSERT(innerBase->ptT() == inner); + // when the intersection is first detected, the span base is marked if there are + // more than one point in the intersection. + if (!zero_or_one(inner->fT)) { + innerBase->upCast()->release(test); + } else { + SkOPASSERT(inner->fT != test->fT); + if (!zero_or_one(test->fT)) { + testBase->upCast()->release(inner); + } else { + segment->markAllDone(); // mark segment as collapsed + SkDEBUGCODE(testBase->debugSetDeleted()); + test->setDeleted(); + SkDEBUGCODE(innerBase->debugSetDeleted()); + inner->setDeleted(); + } + } +#ifdef SK_DEBUG // assert if another undeleted entry points to segment + const SkOpPtT* debugInner = inner; + while ((debugInner = debugInner->next()) != innerStop) { + if (debugInner->segment() != segment) { + continue; + } + if (debugInner->deleted()) { + continue; + } + SkOPASSERT(0); + } +#endif + break; + } while ((inner = inner->next()) != innerStop); + } while ((test = testNext) != stop); + this->checkForCollapsedCoincidence(); + return true; +} + +int SkOpSpan::computeWindSum() { + SkOpGlobalState* globals = this->globalState(); + SkOpContour* contourHead = globals->contourHead(); + int windTry = 0; + while (!this->sortableTop(contourHead) && ++windTry < SkOpGlobalState::kMaxWindingTries) { + } + return this->windSum(); +} + +bool SkOpSpan::containsCoincidence(const SkOpSegment* segment) const { + SkASSERT(this->segment() != segment); + const SkOpSpan* next = fCoincident; + do { + if (next->segment() == segment) { + return true; + } + } while ((next = next->fCoincident) != this); + return false; +} + +void SkOpSpan::init(SkOpSegment* segment, SkOpSpan* prev, double t, const SkPoint& pt) { + SkASSERT(t != 1); + initBase(segment, prev, t, pt); + fCoincident = this; + fToAngle = nullptr; + fWindSum = fOppSum = SK_MinS32; + fWindValue = 1; + fOppValue = 0; + fTopTTry = 0; + fChased = fDone = false; + segment->bumpCount(); + fAlreadyAdded = false; +} + +// Please keep this in sync with debugInsertCoincidence() +bool SkOpSpan::insertCoincidence(const SkOpSegment* segment, bool flipped, bool ordered) { + if (this->containsCoincidence(segment)) { + return true; + } + SkOpPtT* next = &fPtT; + while ((next = next->next()) != &fPtT) { + if (next->segment() == segment) { + SkOpSpan* span; + SkOpSpanBase* base = next->span(); + if (!ordered) { + const SkOpPtT* spanEndPtT = fNext->contains(segment); + FAIL_IF(!spanEndPtT); + const SkOpSpanBase* spanEnd = spanEndPtT->span(); + const SkOpPtT* start = base->ptT()->starter(spanEnd->ptT()); + FAIL_IF(!start->span()->upCastable()); + span = const_cast(start->span()->upCast()); + } else if (flipped) { + span = base->prev(); + FAIL_IF(!span); + } else { + FAIL_IF(!base->upCastable()); + span = base->upCast(); + } + this->insertCoincidence(span); + return true; + } + } +#if DEBUG_COINCIDENCE + SkASSERT(0); // FIXME? if we get here, the span is missing its opposite segment... +#endif + return true; +} + +void SkOpSpan::release(const SkOpPtT* kept) { + SkDEBUGCODE(fDebugDeleted = true); + SkOPASSERT(kept->span() != this); + SkASSERT(!final()); + SkOpSpan* prev = this->prev(); + SkASSERT(prev); + SkOpSpanBase* next = this->next(); + SkASSERT(next); + prev->setNext(next); + next->setPrev(prev); + this->segment()->release(this); + SkOpCoincidence* coincidence = this->globalState()->coincidence(); + if (coincidence) { + coincidence->fixUp(this->ptT(), kept); + } + this->ptT()->setDeleted(); + SkOpPtT* stopPtT = this->ptT(); + SkOpPtT* testPtT = stopPtT; + const SkOpSpanBase* keptSpan = kept->span(); + do { + if (this == testPtT->span()) { + testPtT->setSpan(keptSpan); + } + } while ((testPtT = testPtT->next()) != stopPtT); +} + +void SkOpSpan::setOppSum(int oppSum) { + SkASSERT(!final()); + if (fOppSum != SK_MinS32 && fOppSum != oppSum) { + this->globalState()->setWindingFailed(); + return; + } + SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(oppSum) <= DEBUG_LIMIT_WIND_SUM); + fOppSum = oppSum; +} + +void SkOpSpan::setWindSum(int windSum) { + SkASSERT(!final()); + if (fWindSum != SK_MinS32 && fWindSum != windSum) { + this->globalState()->setWindingFailed(); + return; + } + SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(windSum) <= DEBUG_LIMIT_WIND_SUM); + fWindSum = windSum; +} diff --git a/gfx/skia/skia/src/pathops/SkOpSpan.h b/gfx/skia/skia/src/pathops/SkOpSpan.h new file mode 100644 index 0000000000..7323ed38aa --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkOpSpan.h @@ -0,0 +1,578 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkOpSpan_DEFINED +#define SkOpSpan_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMath.h" +#include "src/pathops/SkPathOpsTypes.h" + +class SkOpAngle; +class SkOpCoincidence; +class SkOpContour; +class SkOpSegment; +class SkOpSpan; +class SkOpSpanBase; + +// subset of op span used by terminal span (when t is equal to one) +class SkOpPtT { +public: + enum { + kIsAlias = 1, + kIsDuplicate = 1 + }; + + const SkOpPtT* active() const; + + // please keep in sync with debugAddOpp() + void addOpp(SkOpPtT* opp, SkOpPtT* oppPrev) { + SkOpPtT* oldNext = this->fNext; + SkASSERT(this != opp); + this->fNext = opp; + SkASSERT(oppPrev != oldNext); + oppPrev->fNext = oldNext; + } + + bool alias() const; + bool coincident() const { return fCoincident; } + bool contains(const SkOpPtT* ) const; + bool contains(const SkOpSegment*, const SkPoint& ) const; + bool contains(const SkOpSegment*, double t) const; + const SkOpPtT* contains(const SkOpSegment* ) const; + SkOpContour* contour() const; + + int debugID() const { + return SkDEBUGRELEASE(fID, -1); + } + + void debugAddOpp(const SkOpPtT* opp, const SkOpPtT* oppPrev) const; + const SkOpAngle* debugAngle(int id) const; + const SkOpCoincidence* debugCoincidence() const; + bool debugContains(const SkOpPtT* ) const; + const SkOpPtT* debugContains(const SkOpSegment* check) const; + SkOpContour* debugContour(int id) const; + const SkOpPtT* debugEnder(const SkOpPtT* end) const; + int debugLoopLimit(bool report) const; + bool debugMatchID(int id) const; + const SkOpPtT* debugOppPrev(const SkOpPtT* opp) const; + const SkOpPtT* debugPtT(int id) const; + void debugResetCoinT() const; + const SkOpSegment* debugSegment(int id) const; + void debugSetCoinT(int ) const; + const SkOpSpanBase* debugSpan(int id) const; + void debugValidate() const; + + bool deleted() const { + return fDeleted; + } + + bool duplicate() const { + return fDuplicatePt; + } + + void dump() const; // available to testing only + void dumpAll() const; + void dumpBase() const; + + const SkOpPtT* find(const SkOpSegment* ) const; + SkOpGlobalState* globalState() const; + void init(SkOpSpanBase* , double t, const SkPoint& , bool dup); + + void insert(SkOpPtT* span) { + SkASSERT(span != this); + span->fNext = fNext; + fNext = span; + } + + const SkOpPtT* next() const { + return fNext; + } + + SkOpPtT* next() { + return fNext; + } + + bool onEnd() const; + + // returns nullptr if this is already in the opp ptT loop + SkOpPtT* oppPrev(const SkOpPtT* opp) const { + // find the fOpp ptr to opp + SkOpPtT* oppPrev = opp->fNext; + if (oppPrev == this) { + return nullptr; + } + while (oppPrev->fNext != opp) { + oppPrev = oppPrev->fNext; + if (oppPrev == this) { + return nullptr; + } + } + return oppPrev; + } + + static bool Overlaps(const SkOpPtT* s1, const SkOpPtT* e1, const SkOpPtT* s2, + const SkOpPtT* e2, const SkOpPtT** sOut, const SkOpPtT** eOut) { + const SkOpPtT* start1 = s1->fT < e1->fT ? s1 : e1; + const SkOpPtT* start2 = s2->fT < e2->fT ? s2 : e2; + *sOut = between(s1->fT, start2->fT, e1->fT) ? start2 + : between(s2->fT, start1->fT, e2->fT) ? start1 : nullptr; + const SkOpPtT* end1 = s1->fT < e1->fT ? e1 : s1; + const SkOpPtT* end2 = s2->fT < e2->fT ? e2 : s2; + *eOut = between(s1->fT, end2->fT, e1->fT) ? end2 + : between(s2->fT, end1->fT, e2->fT) ? end1 : nullptr; + if (*sOut == *eOut) { + SkOPOBJASSERT(s1, start1->fT >= end2->fT || start2->fT >= end1->fT); + return false; + } + SkASSERT(!*sOut || *sOut != *eOut); + return *sOut && *eOut; + } + + bool ptAlreadySeen(const SkOpPtT* head) const; + SkOpPtT* prev(); + + const SkOpSegment* segment() const; + SkOpSegment* segment(); + + void setCoincident() const { + SkOPASSERT(!fDeleted); + fCoincident = true; + } + + void setDeleted(); + + void setSpan(const SkOpSpanBase* span) { + fSpan = const_cast(span); + } + + const SkOpSpanBase* span() const { + return fSpan; + } + + SkOpSpanBase* span() { + return fSpan; + } + + const SkOpPtT* starter(const SkOpPtT* end) const { + return fT < end->fT ? this : end; + } + + double fT; + SkPoint fPt; // cache of point value at this t +protected: + SkOpSpanBase* fSpan; // contains winding data + SkOpPtT* fNext; // intersection on opposite curve or alias on this curve + bool fDeleted; // set if removed from span list + bool fDuplicatePt; // set if identical pt is somewhere in the next loop + // below mutable since referrer is otherwise always const + mutable bool fCoincident; // set if at some point a coincident span pointed here + SkDEBUGCODE(int fID); +}; + +class SkOpSpanBase { +public: + enum class Collapsed { + kNo, + kYes, + kError, + }; + + bool addOpp(SkOpSpanBase* opp); + + void bumpSpanAdds() { + ++fSpanAdds; + } + + bool chased() const { + return fChased; + } + + void checkForCollapsedCoincidence(); + + const SkOpSpanBase* coinEnd() const { + return fCoinEnd; + } + + Collapsed collapsed(double s, double e) const; + bool contains(const SkOpSpanBase* ) const; + const SkOpPtT* contains(const SkOpSegment* ) const; + + bool containsCoinEnd(const SkOpSpanBase* coin) const { + SkASSERT(this != coin); + const SkOpSpanBase* next = this; + while ((next = next->fCoinEnd) != this) { + if (next == coin) { + return true; + } + } + return false; + } + + bool containsCoinEnd(const SkOpSegment* ) const; + SkOpContour* contour() const; + + int debugBumpCount() { + return SkDEBUGRELEASE(++fCount, -1); + } + + int debugID() const { + return SkDEBUGRELEASE(fID, -1); + } + +#if DEBUG_COIN + void debugAddOpp(SkPathOpsDebug::GlitchLog* , const SkOpSpanBase* opp) const; +#endif + bool debugAlignedEnd(double t, const SkPoint& pt) const; + bool debugAlignedInner() const; + const SkOpAngle* debugAngle(int id) const; +#if DEBUG_COIN + void debugCheckForCollapsedCoincidence(SkPathOpsDebug::GlitchLog* ) const; +#endif + const SkOpCoincidence* debugCoincidence() const; + bool debugCoinEndLoopCheck() const; + SkOpContour* debugContour(int id) const; +#ifdef SK_DEBUG + bool debugDeleted() const { return fDebugDeleted; } +#endif +#if DEBUG_COIN + void debugInsertCoinEnd(SkPathOpsDebug::GlitchLog* , + const SkOpSpanBase* ) const; + void debugMergeMatches(SkPathOpsDebug::GlitchLog* log, + const SkOpSpanBase* opp) const; +#endif + const SkOpPtT* debugPtT(int id) const; + void debugResetCoinT() const; + const SkOpSegment* debugSegment(int id) const; + void debugSetCoinT(int ) const; +#ifdef SK_DEBUG + void debugSetDeleted() { fDebugDeleted = true; } +#endif + const SkOpSpanBase* debugSpan(int id) const; + const SkOpSpan* debugStarter(SkOpSpanBase const** endPtr) const; + SkOpGlobalState* globalState() const; + void debugValidate() const; + + bool deleted() const { + return fPtT.deleted(); + } + + void dump() const; // available to testing only + void dumpCoin() const; + void dumpAll() const; + void dumpBase() const; + void dumpHead() const; + + bool final() const { + return fPtT.fT == 1; + } + + SkOpAngle* fromAngle() const { + return fFromAngle; + } + + void initBase(SkOpSegment* parent, SkOpSpan* prev, double t, const SkPoint& pt); + + // Please keep this in sync with debugInsertCoinEnd() + void insertCoinEnd(SkOpSpanBase* coin) { + if (containsCoinEnd(coin)) { + SkASSERT(coin->containsCoinEnd(this)); + return; + } + debugValidate(); + SkASSERT(this != coin); + SkOpSpanBase* coinNext = coin->fCoinEnd; + coin->fCoinEnd = this->fCoinEnd; + this->fCoinEnd = coinNext; + debugValidate(); + } + + void merge(SkOpSpan* span); + bool mergeMatches(SkOpSpanBase* opp); + + const SkOpSpan* prev() const { + return fPrev; + } + + SkOpSpan* prev() { + return fPrev; + } + + const SkPoint& pt() const { + return fPtT.fPt; + } + + const SkOpPtT* ptT() const { + return &fPtT; + } + + SkOpPtT* ptT() { + return &fPtT; + } + + SkOpSegment* segment() const { + return fSegment; + } + + void setAligned() { + fAligned = true; + } + + void setChased(bool chased) { + fChased = chased; + } + + void setFromAngle(SkOpAngle* angle) { + fFromAngle = angle; + } + + void setPrev(SkOpSpan* prev) { + fPrev = prev; + } + + bool simple() const { + fPtT.debugValidate(); + return fPtT.next()->next() == &fPtT; + } + + int spanAddsCount() const { + return fSpanAdds; + } + + const SkOpSpan* starter(const SkOpSpanBase* end) const { + const SkOpSpanBase* result = t() < end->t() ? this : end; + return result->upCast(); + } + + SkOpSpan* starter(SkOpSpanBase* end) { + SkASSERT(this->segment() == end->segment()); + SkOpSpanBase* result = t() < end->t() ? this : end; + return result->upCast(); + } + + SkOpSpan* starter(SkOpSpanBase** endPtr) { + SkOpSpanBase* end = *endPtr; + SkASSERT(this->segment() == end->segment()); + SkOpSpanBase* result; + if (t() < end->t()) { + result = this; + } else { + result = end; + *endPtr = this; + } + return result->upCast(); + } + + int step(const SkOpSpanBase* end) const { + return t() < end->t() ? 1 : -1; + } + + double t() const { + return fPtT.fT; + } + + void unaligned() { + fAligned = false; + } + + SkOpSpan* upCast() { + SkASSERT(!final()); + return (SkOpSpan*) this; + } + + const SkOpSpan* upCast() const { + SkOPASSERT(!final()); + return (const SkOpSpan*) this; + } + + SkOpSpan* upCastable() { + return final() ? nullptr : upCast(); + } + + const SkOpSpan* upCastable() const { + return final() ? nullptr : upCast(); + } + +private: + void alignInner(); + +protected: // no direct access to internals to avoid treating a span base as a span + SkOpPtT fPtT; // list of points and t values associated with the start of this span + SkOpSegment* fSegment; // segment that contains this span + SkOpSpanBase* fCoinEnd; // linked list of coincident spans that end here (may point to itself) + SkOpAngle* fFromAngle; // points to next angle from span start to end + SkOpSpan* fPrev; // previous intersection point + int fSpanAdds; // number of times intersections have been added to span + bool fAligned; + bool fChased; // set after span has been added to chase array + SkDEBUGCODE(int fCount); // number of pt/t pairs added + SkDEBUGCODE(int fID); + SkDEBUGCODE(bool fDebugDeleted); // set when span was merged with another span +}; + +class SkOpSpan : public SkOpSpanBase { +public: + bool alreadyAdded() const { + if (fAlreadyAdded) { + return true; + } + return false; + } + + bool clearCoincident() { + SkASSERT(!final()); + if (fCoincident == this) { + return false; + } + fCoincident = this; + return true; + } + + int computeWindSum(); + bool containsCoincidence(const SkOpSegment* ) const; + + bool containsCoincidence(const SkOpSpan* coin) const { + SkASSERT(this != coin); + const SkOpSpan* next = this; + while ((next = next->fCoincident) != this) { + if (next == coin) { + return true; + } + } + return false; + } + + bool debugCoinLoopCheck() const; +#if DEBUG_COIN + void debugInsertCoincidence(SkPathOpsDebug::GlitchLog* , const SkOpSpan* ) const; + void debugInsertCoincidence(SkPathOpsDebug::GlitchLog* , + const SkOpSegment* , bool flipped, bool ordered) const; +#endif + void dumpCoin() const; + bool dumpSpan() const; + + bool done() const { + SkASSERT(!final()); + return fDone; + } + + void init(SkOpSegment* parent, SkOpSpan* prev, double t, const SkPoint& pt); + bool insertCoincidence(const SkOpSegment* , bool flipped, bool ordered); + + // Please keep this in sync with debugInsertCoincidence() + void insertCoincidence(SkOpSpan* coin) { + if (containsCoincidence(coin)) { + SkASSERT(coin->containsCoincidence(this)); + return; + } + debugValidate(); + SkASSERT(this != coin); + SkOpSpan* coinNext = coin->fCoincident; + coin->fCoincident = this->fCoincident; + this->fCoincident = coinNext; + debugValidate(); + } + + bool isCanceled() const { + SkASSERT(!final()); + return fWindValue == 0 && fOppValue == 0; + } + + bool isCoincident() const { + SkASSERT(!final()); + return fCoincident != this; + } + + void markAdded() { + fAlreadyAdded = true; + } + + SkOpSpanBase* next() const { + SkASSERT(!final()); + return fNext; + } + + int oppSum() const { + SkASSERT(!final()); + return fOppSum; + } + + int oppValue() const { + SkASSERT(!final()); + return fOppValue; + } + + void release(const SkOpPtT* ); + + SkOpPtT* setCoinStart(SkOpSpan* oldCoinStart, SkOpSegment* oppSegment); + + void setDone(bool done) { + SkASSERT(!final()); + fDone = done; + } + + void setNext(SkOpSpanBase* nextT) { + SkASSERT(!final()); + fNext = nextT; + } + + void setOppSum(int oppSum); + + void setOppValue(int oppValue) { + SkASSERT(!final()); + SkASSERT(fOppSum == SK_MinS32); + SkOPASSERT(!oppValue || !fDone); + fOppValue = oppValue; + } + + void setToAngle(SkOpAngle* angle) { + SkASSERT(!final()); + fToAngle = angle; + } + + void setWindSum(int windSum); + + void setWindValue(int windValue) { + SkASSERT(!final()); + SkASSERT(windValue >= 0); + SkASSERT(fWindSum == SK_MinS32); + SkOPASSERT(!windValue || !fDone); + fWindValue = windValue; + } + + bool sortableTop(SkOpContour* ); + + SkOpAngle* toAngle() const { + SkASSERT(!final()); + return fToAngle; + } + + int windSum() const { + SkASSERT(!final()); + return fWindSum; + } + + int windValue() const { + SkOPASSERT(!final()); + return fWindValue; + } + +private: // no direct access to internals to avoid treating a span base as a span + SkOpSpan* fCoincident; // linked list of spans coincident with this one (may point to itself) + SkOpAngle* fToAngle; // points to next angle from span start to end + SkOpSpanBase* fNext; // next intersection point + int fWindSum; // accumulated from contours surrounding this one. + int fOppSum; // for binary operators: the opposite winding sum + int fWindValue; // 0 == canceled; 1 == normal; >1 == coincident + int fOppValue; // normally 0 -- when binary coincident edges combine, opp value goes here + int fTopTTry; // specifies direction and t value to try next + bool fDone; // if set, this span to next higher T has been processed + bool fAlreadyAdded; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsAsWinding.cpp b/gfx/skia/skia/src/pathops/SkPathOpsAsWinding.cpp new file mode 100644 index 0000000000..7e2912ea03 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsAsWinding.cpp @@ -0,0 +1,457 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPath.h" +#include "include/core/SkPathBuilder.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkMacros.h" +#include "src/core/SkPathPriv.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +using std::vector; + +struct Contour { + enum class Direction { // SkPathDirection doesn't have 'none' state + kCCW = -1, + kNone, + kCW, + }; + + Contour(const SkRect& bounds, int lastStart, int verbStart) + : fBounds(bounds) + , fVerbStart(lastStart) + , fVerbEnd(verbStart) { + } + + vector fChildren; + const SkRect fBounds; + SkPoint fMinXY{SK_ScalarMax, SK_ScalarMax}; + const int fVerbStart; + const int fVerbEnd; + Direction fDirection{Direction::kNone}; + bool fContained{false}; + bool fReverse{false}; +}; + +static const int kPtCount[] = { 1, 1, 2, 2, 3, 0 }; +static const int kPtIndex[] = { 0, 1, 1, 1, 1, 0 }; + +static Contour::Direction to_direction(SkScalar dy) { + return dy > 0 ? Contour::Direction::kCCW : dy < 0 ? Contour::Direction::kCW : + Contour::Direction::kNone; +} + +static int contains_edge(SkPoint pts[4], SkPath::Verb verb, SkScalar weight, const SkPoint& edge) { + SkRect bounds; + bounds.setBounds(pts, kPtCount[verb] + 1); + if (bounds.fTop > edge.fY) { + return 0; + } + if (bounds.fBottom <= edge.fY) { // check to see if y is at line end to avoid double counting + return 0; + } + if (bounds.fLeft >= edge.fX) { + return 0; + } + int winding = 0; + double tVals[3]; + Contour::Direction directions[3]; + // must intersect horz ray with curve in case it intersects more than once + int count = (*CurveIntercept[verb * 2])(pts, weight, edge.fY, tVals); + SkASSERT(between(0, count, 3)); + // remove results to the right of edge + for (int index = 0; index < count; ) { + SkScalar intersectX = (*CurvePointAtT[verb])(pts, weight, tVals[index]).fX; + if (intersectX < edge.fX) { + ++index; + continue; + } + if (intersectX > edge.fX) { + tVals[index] = tVals[--count]; + continue; + } + // if intersect x equals edge x, we need to determine if pts is to the left or right of edge + if (pts[0].fX < edge.fX && pts[kPtCount[verb]].fX < edge.fX) { + ++index; + continue; + } + // TODO : other cases need discriminating. need op angle code to figure it out + // example: edge ends 45 degree diagonal going up. If pts is to the left of edge, keep. + // if pts is to the right of edge, discard. With code as is, can't distiguish the two cases. + tVals[index] = tVals[--count]; + } + // use first derivative to determine if intersection is contributing +1 or -1 to winding + for (int index = 0; index < count; ++index) { + directions[index] = to_direction((*CurveSlopeAtT[verb])(pts, weight, tVals[index]).fY); + } + for (int index = 0; index < count; ++index) { + // skip intersections that end at edge and go up + if (zero_or_one(tVals[index]) && Contour::Direction::kCCW != directions[index]) { + continue; + } + winding += (int) directions[index]; + } + return winding; // note winding indicates containership, not contour direction +} + +static SkScalar conic_weight(const SkPath::Iter& iter, SkPath::Verb verb) { + return SkPath::kConic_Verb == verb ? iter.conicWeight() : 1; +} + +static SkPoint left_edge(SkPoint pts[4], SkPath::Verb verb, SkScalar weight) { + SkASSERT(SkPath::kLine_Verb <= verb && verb <= SkPath::kCubic_Verb); + SkPoint result; + double t SK_INIT_TO_AVOID_WARNING; + int roots = 0; + if (SkPath::kLine_Verb == verb) { + result = pts[0].fX < pts[1].fX ? pts[0] : pts[1]; + } else if (SkPath::kQuad_Verb == verb) { + SkDQuad quad; + quad.set(pts); + if (!quad.monotonicInX()) { + roots = SkDQuad::FindExtrema(&quad[0].fX, &t); + } + if (roots) { + result = quad.ptAtT(t).asSkPoint(); + } else { + result = pts[0].fX < pts[2].fX ? pts[0] : pts[2]; + } + } else if (SkPath::kConic_Verb == verb) { + SkDConic conic; + conic.set(pts, weight); + if (!conic.monotonicInX()) { + roots = SkDConic::FindExtrema(&conic[0].fX, weight, &t); + } + if (roots) { + result = conic.ptAtT(t).asSkPoint(); + } else { + result = pts[0].fX < pts[2].fX ? pts[0] : pts[2]; + } + } else { + SkASSERT(SkPath::kCubic_Verb == verb); + SkDCubic cubic; + cubic.set(pts); + if (!cubic.monotonicInX()) { + double tValues[2]; + roots = SkDCubic::FindExtrema(&cubic[0].fX, tValues); + SkASSERT(roots <= 2); + for (int index = 0; index < roots; ++index) { + SkPoint temp = cubic.ptAtT(tValues[index]).asSkPoint(); + if (0 == index || result.fX > temp.fX) { + result = temp; + } + } + } + if (roots) { + result = cubic.ptAtT(t).asSkPoint(); + } else { + result = pts[0].fX < pts[3].fX ? pts[0] : pts[3]; + } + } + return result; +} + +class OpAsWinding { +public: + enum class Edge { + kInitial, + kCompare, + }; + + OpAsWinding(const SkPath& path) + : fPath(path) { + } + + void contourBounds(vector* containers) { + SkRect bounds; + bounds.setEmpty(); + int lastStart = 0; + int verbStart = 0; + for (auto [verb, pts, w] : SkPathPriv::Iterate(fPath)) { + if (SkPathVerb::kMove == verb) { + if (!bounds.isEmpty()) { + containers->emplace_back(bounds, lastStart, verbStart); + lastStart = verbStart; + } + bounds.setBounds(&pts[kPtIndex[SkPath::kMove_Verb]], kPtCount[SkPath::kMove_Verb]); + } + if (SkPathVerb::kLine <= verb && verb <= SkPathVerb::kCubic) { + SkRect verbBounds; + verbBounds.setBounds(&pts[kPtIndex[(int)verb]], kPtCount[(int)verb]); + bounds.joinPossiblyEmptyRect(verbBounds); + } + ++verbStart; + } + if (!bounds.isEmpty()) { + containers->emplace_back(bounds, lastStart, ++verbStart); + } + } + + Contour::Direction getDirection(Contour& contour) { + SkPath::Iter iter(fPath, true); + int verbCount = -1; + SkPath::Verb verb; + SkPoint pts[4]; + + SkScalar total_signed_area = 0; + do { + verb = iter.next(pts); + if (++verbCount < contour.fVerbStart) { + continue; + } + if (verbCount >= contour.fVerbEnd) { + continue; + } + if (SkPath::kLine_Verb > verb || verb > SkPath::kCubic_Verb) { + continue; + } + + switch (verb) + { + case SkPath::kLine_Verb: + total_signed_area += (pts[0].fY - pts[1].fY) * (pts[0].fX + pts[1].fX); + break; + case SkPath::kQuad_Verb: + case SkPath::kConic_Verb: + total_signed_area += (pts[0].fY - pts[2].fY) * (pts[0].fX + pts[2].fX); + break; + case SkPath::kCubic_Verb: + total_signed_area += (pts[0].fY - pts[3].fY) * (pts[0].fX + pts[3].fX); + break; + default: + break; + } + } while (SkPath::kDone_Verb != verb); + + return total_signed_area < 0 ? Contour::Direction::kCCW: Contour::Direction::kCW; + } + + int nextEdge(Contour& contour, Edge edge) { + SkPath::Iter iter(fPath, true); + SkPoint pts[4]; + SkPath::Verb verb; + int verbCount = -1; + int winding = 0; + do { + verb = iter.next(pts); + if (++verbCount < contour.fVerbStart) { + continue; + } + if (verbCount >= contour.fVerbEnd) { + continue; + } + if (SkPath::kLine_Verb > verb || verb > SkPath::kCubic_Verb) { + continue; + } + bool horizontal = true; + for (int index = 1; index <= kPtCount[verb]; ++index) { + if (pts[0].fY != pts[index].fY) { + horizontal = false; + break; + } + } + if (horizontal) { + continue; + } + if (edge == Edge::kCompare) { + winding += contains_edge(pts, verb, conic_weight(iter, verb), contour.fMinXY); + continue; + } + SkASSERT(edge == Edge::kInitial); + SkPoint minXY = left_edge(pts, verb, conic_weight(iter, verb)); + if (minXY.fX > contour.fMinXY.fX) { + continue; + } + if (minXY.fX == contour.fMinXY.fX) { + if (minXY.fY != contour.fMinXY.fY) { + continue; + } + } + contour.fMinXY = minXY; + } while (SkPath::kDone_Verb != verb); + return winding; + } + + bool containerContains(Contour& contour, Contour& test) { + // find outside point on lesser contour + // arbitrarily, choose non-horizontal edge where point <= bounds left + // note that if leftmost point is control point, may need tight bounds + // to find edge with minimum-x + if (SK_ScalarMax == test.fMinXY.fX) { + this->nextEdge(test, Edge::kInitial); + } + // find all edges on greater equal or to the left of one on lesser + contour.fMinXY = test.fMinXY; + int winding = this->nextEdge(contour, Edge::kCompare); + // if edge is up, mark contour cw, otherwise, ccw + // sum of greater edges direction should be cw, 0, ccw + test.fContained = winding != 0; + return -1 <= winding && winding <= 1; + } + + void inParent(Contour& contour, Contour& parent) { + // move contour into sibling list contained by parent + for (auto test : parent.fChildren) { + if (test->fBounds.contains(contour.fBounds)) { + inParent(contour, *test); + return; + } + } + // move parent's children into contour's children if contained by contour + for (auto iter = parent.fChildren.begin(); iter != parent.fChildren.end(); ) { + if (contour.fBounds.contains((*iter)->fBounds)) { + contour.fChildren.push_back(*iter); + iter = parent.fChildren.erase(iter); + continue; + } + ++iter; + } + parent.fChildren.push_back(&contour); + } + + bool checkContainerChildren(Contour* parent, Contour* child) { + for (auto grandChild : child->fChildren) { + if (!checkContainerChildren(child, grandChild)) { + return false; + } + } + if (parent) { + if (!containerContains(*parent, *child)) { + return false; + } + } + return true; + } + + bool markReverse(Contour* parent, Contour* child) { + bool reversed = false; + for (auto grandChild : child->fChildren) { + reversed |= markReverse(grandChild->fContained ? child : parent, grandChild); + } + + child->fDirection = getDirection(*child); + if (parent && parent->fDirection == child->fDirection) { + child->fReverse = true; + child->fDirection = (Contour::Direction) -(int) child->fDirection; + return true; + } + return reversed; + } + + SkPath reverseMarkedContours(vector& contours, SkPathFillType fillType) { + SkPathPriv::Iterate iterate(fPath); + auto iter = iterate.begin(); + int verbCount = 0; + + SkPathBuilder result; + result.setFillType(fillType); + for (const Contour& contour : contours) { + SkPathBuilder reverse; + SkPathBuilder* temp = contour.fReverse ? &reverse : &result; + for (; iter != iterate.end() && verbCount < contour.fVerbEnd; ++iter, ++verbCount) { + auto [verb, pts, w] = *iter; + switch (verb) { + case SkPathVerb::kMove: + temp->moveTo(pts[0]); + break; + case SkPathVerb::kLine: + temp->lineTo(pts[1]); + break; + case SkPathVerb::kQuad: + temp->quadTo(pts[1], pts[2]); + break; + case SkPathVerb::kConic: + temp->conicTo(pts[1], pts[2], *w); + break; + case SkPathVerb::kCubic: + temp->cubicTo(pts[1], pts[2], pts[3]); + break; + case SkPathVerb::kClose: + temp->close(); + break; + } + } + if (contour.fReverse) { + SkASSERT(temp == &reverse); + SkPathPriv::ReverseAddPath(&result, reverse.detach()); + } + } + return result.detach(); + } + +private: + const SkPath& fPath; +}; + +static bool set_result_path(SkPath* result, const SkPath& path, SkPathFillType fillType) { + *result = path; + result->setFillType(fillType); + return true; +} + +bool AsWinding(const SkPath& path, SkPath* result) { + if (!path.isFinite()) { + return false; + } + SkPathFillType fillType = path.getFillType(); + if (fillType == SkPathFillType::kWinding + || fillType == SkPathFillType::kInverseWinding ) { + return set_result_path(result, path, fillType); + } + fillType = path.isInverseFillType() ? SkPathFillType::kInverseWinding : + SkPathFillType::kWinding; + if (path.isEmpty() || path.isConvex()) { + return set_result_path(result, path, fillType); + } + // count contours + vector contours; // one per contour + OpAsWinding winder(path); + winder.contourBounds(&contours); + if (contours.size() <= 1) { + return set_result_path(result, path, fillType); + } + // create contour bounding box tree + Contour sorted(SkRect(), 0, 0); + for (auto& contour : contours) { + winder.inParent(contour, sorted); + } + // if sorted has no grandchildren, no child has to fix its children's winding + if (std::all_of(sorted.fChildren.begin(), sorted.fChildren.end(), + [](const Contour* contour) -> bool { return !contour->fChildren.size(); } )) { + return set_result_path(result, path, fillType); + } + // starting with outermost and moving inward, see if one path contains another + for (auto contour : sorted.fChildren) { + winder.nextEdge(*contour, OpAsWinding::Edge::kInitial); + contour->fDirection = winder.getDirection(*contour); + if (!winder.checkContainerChildren(nullptr, contour)) { + return false; + } + } + // starting with outermost and moving inward, mark paths to reverse + bool reversed = false; + for (auto contour : sorted.fChildren) { + reversed |= winder.markReverse(nullptr, contour); + } + if (!reversed) { + return set_result_path(result, path, fillType); + } + *result = winder.reverseMarkedContours(contours, fillType); + return true; +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsBounds.h b/gfx/skia/skia/src/pathops/SkPathOpsBounds.h new file mode 100644 index 0000000000..bcf578a3a9 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsBounds.h @@ -0,0 +1,65 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpBounds_DEFINED +#define SkPathOpBounds_DEFINED + +#include "include/core/SkRect.h" +#include "src/pathops/SkPathOpsRect.h" + +// SkPathOpsBounds, unlike SkRect, does not consider a line to be empty. +struct SkPathOpsBounds : public SkRect { + static bool Intersects(const SkPathOpsBounds& a, const SkPathOpsBounds& b) { + return AlmostLessOrEqualUlps(a.fLeft, b.fRight) + && AlmostLessOrEqualUlps(b.fLeft, a.fRight) + && AlmostLessOrEqualUlps(a.fTop, b.fBottom) + && AlmostLessOrEqualUlps(b.fTop, a.fBottom); + } + + // Note that add(), unlike SkRect::join() or SkRect::growToInclude() + // does not treat the bounds of horizontal and vertical lines as + // empty rectangles. + void add(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom) { + if (left < fLeft) fLeft = left; + if (top < fTop) fTop = top; + if (right > fRight) fRight = right; + if (bottom > fBottom) fBottom = bottom; + } + + void add(const SkPathOpsBounds& toAdd) { + add(toAdd.fLeft, toAdd.fTop, toAdd.fRight, toAdd.fBottom); + } + + void add(const SkPoint& pt) { + if (pt.fX < fLeft) fLeft = pt.fX; + if (pt.fY < fTop) fTop = pt.fY; + if (pt.fX > fRight) fRight = pt.fX; + if (pt.fY > fBottom) fBottom = pt.fY; + } + + void add(const SkDPoint& pt) { + if (pt.fX < fLeft) fLeft = SkDoubleToScalar(pt.fX); + if (pt.fY < fTop) fTop = SkDoubleToScalar(pt.fY); + if (pt.fX > fRight) fRight = SkDoubleToScalar(pt.fX); + if (pt.fY > fBottom) fBottom = SkDoubleToScalar(pt.fY); + } + + bool almostContains(const SkPoint& pt) const { + return AlmostLessOrEqualUlps(fLeft, pt.fX) + && AlmostLessOrEqualUlps(pt.fX, fRight) + && AlmostLessOrEqualUlps(fTop, pt.fY) + && AlmostLessOrEqualUlps(pt.fY, fBottom); + } + + bool contains(const SkPoint& pt) const { + return fLeft <= pt.fX && fTop <= pt.fY && + fRight >= pt.fX && fBottom >= pt.fY; + } + + using INHERITED = SkRect; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsCommon.cpp b/gfx/skia/skia/src/pathops/SkPathOpsCommon.cpp new file mode 100644 index 0000000000..18a5005d7e --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsCommon.cpp @@ -0,0 +1,338 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pathops/SkPathOpsCommon.h" + +#include "include/core/SkTypes.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTDArray.h" +#include "src/base/SkTSort.h" +#include "src/pathops/SkOpAngle.h" +#include "src/pathops/SkOpCoincidence.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" + +const SkOpAngle* AngleWinding(SkOpSpanBase* start, SkOpSpanBase* end, int* windingPtr, + bool* sortablePtr) { + // find first angle, initialize winding to computed fWindSum + SkOpSegment* segment = start->segment(); + const SkOpAngle* angle = segment->spanToAngle(start, end); + if (!angle) { + *windingPtr = SK_MinS32; + return nullptr; + } + bool computeWinding = false; + const SkOpAngle* firstAngle = angle; + bool loop = false; + bool unorderable = false; + int winding = SK_MinS32; + do { + angle = angle->next(); + if (!angle) { + return nullptr; + } + unorderable |= angle->unorderable(); + if ((computeWinding = unorderable || (angle == firstAngle && loop))) { + break; // if we get here, there's no winding, loop is unorderable + } + loop |= angle == firstAngle; + segment = angle->segment(); + winding = segment->windSum(angle); + } while (winding == SK_MinS32); + // if the angle loop contains an unorderable span, the angle order may be useless + // directly compute the winding in this case for each span + if (computeWinding) { + firstAngle = angle; + winding = SK_MinS32; + do { + SkOpSpanBase* startSpan = angle->start(); + SkOpSpanBase* endSpan = angle->end(); + SkOpSpan* lesser = startSpan->starter(endSpan); + int testWinding = lesser->windSum(); + if (testWinding == SK_MinS32) { + testWinding = lesser->computeWindSum(); + } + if (testWinding != SK_MinS32) { + segment = angle->segment(); + winding = testWinding; + } + angle = angle->next(); + } while (angle != firstAngle); + } + *sortablePtr = !unorderable; + *windingPtr = winding; + return angle; +} + +SkOpSpan* FindUndone(SkOpContourHead* contourHead) { + SkOpContour* contour = contourHead; + do { + if (contour->done()) { + continue; + } + SkOpSpan* result = contour->undoneSpan(); + if (result) { + return result; + } + } while ((contour = contour->next())); + return nullptr; +} + +SkOpSegment* FindChase(SkTDArray* chase, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr) { + while (!chase->empty()) { + SkOpSpanBase* span = chase->back(); + chase->pop_back(); + SkOpSegment* segment = span->segment(); + *startPtr = span->ptT()->next()->span(); + bool done = true; + *endPtr = nullptr; + if (SkOpAngle* last = segment->activeAngle(*startPtr, startPtr, endPtr, &done)) { + *startPtr = last->start(); + *endPtr = last->end(); + #if TRY_ROTATE + *chase->insert(0) = span; + #else + *chase->append() = span; + #endif + return last->segment(); + } + if (done) { + continue; + } + // find first angle, initialize winding to computed wind sum + int winding; + bool sortable; + const SkOpAngle* angle = AngleWinding(*startPtr, *endPtr, &winding, &sortable); + if (!angle) { + return nullptr; + } + if (winding == SK_MinS32) { + continue; + } + int sumWinding SK_INIT_TO_AVOID_WARNING; + if (sortable) { + segment = angle->segment(); + sumWinding = segment->updateWindingReverse(angle); + } + SkOpSegment* first = nullptr; + const SkOpAngle* firstAngle = angle; + while ((angle = angle->next()) != firstAngle) { + segment = angle->segment(); + SkOpSpanBase* start = angle->start(); + SkOpSpanBase* end = angle->end(); + int maxWinding SK_INIT_TO_AVOID_WARNING; + if (sortable) { + segment->setUpWinding(start, end, &maxWinding, &sumWinding); + } + if (!segment->done(angle)) { + if (!first && (sortable || start->starter(end)->windSum() != SK_MinS32)) { + first = segment; + *startPtr = start; + *endPtr = end; + } + // OPTIMIZATION: should this also add to the chase? + if (sortable) { + // TODO: add error handling + SkAssertResult(segment->markAngle(maxWinding, sumWinding, angle, nullptr)); + } + } + } + if (first) { + #if TRY_ROTATE + *chase->insert(0) = span; + #else + *chase->append() = span; + #endif + return first; + } + } + return nullptr; +} + +bool SortContourList(SkOpContourHead** contourList, bool evenOdd, bool oppEvenOdd) { + SkTDArray list; + SkOpContour* contour = *contourList; + do { + if (contour->count()) { + contour->setOppXor(contour->operand() ? evenOdd : oppEvenOdd); + *list.append() = contour; + } + } while ((contour = contour->next())); + int count = list.size(); + if (!count) { + return false; + } + if (count > 1) { + SkTQSort(list.begin(), list.end()); + } + contour = list[0]; + SkOpContourHead* contourHead = static_cast(contour); + contour->globalState()->setContourHead(contourHead); + *contourList = contourHead; + for (int index = 1; index < count; ++index) { + SkOpContour* next = list[index]; + contour->setNext(next); + contour = next; + } + contour->setNext(nullptr); + return true; +} + +static void calc_angles(SkOpContourHead* contourList DEBUG_COIN_DECLARE_PARAMS()) { + DEBUG_STATIC_SET_PHASE(contourList); + SkOpContour* contour = contourList; + do { + contour->calcAngles(); + } while ((contour = contour->next())); +} + +static bool missing_coincidence(SkOpContourHead* contourList DEBUG_COIN_DECLARE_PARAMS()) { + DEBUG_STATIC_SET_PHASE(contourList); + SkOpContour* contour = contourList; + bool result = false; + do { + result |= contour->missingCoincidence(); + } while ((contour = contour->next())); + return result; +} + +static bool move_multiples(SkOpContourHead* contourList DEBUG_COIN_DECLARE_PARAMS()) { + DEBUG_STATIC_SET_PHASE(contourList); + SkOpContour* contour = contourList; + do { + if (!contour->moveMultiples()) { + return false; + } + } while ((contour = contour->next())); + return true; +} + +static bool move_nearby(SkOpContourHead* contourList DEBUG_COIN_DECLARE_PARAMS()) { + DEBUG_STATIC_SET_PHASE(contourList); + SkOpContour* contour = contourList; + do { + if (!contour->moveNearby()) { + return false; + } + } while ((contour = contour->next())); + return true; +} + +static bool sort_angles(SkOpContourHead* contourList) { + SkOpContour* contour = contourList; + do { + if (!contour->sortAngles()) { + return false; + } + } while ((contour = contour->next())); + return true; +} + +bool HandleCoincidence(SkOpContourHead* contourList, SkOpCoincidence* coincidence) { + SkOpGlobalState* globalState = contourList->globalState(); + // match up points within the coincident runs + if (!coincidence->addExpanded(DEBUG_PHASE_ONLY_PARAMS(kIntersecting))) { + return false; + } + // combine t values when multiple intersections occur on some segments but not others + if (!move_multiples(contourList DEBUG_PHASE_PARAMS(kWalking))) { + return false; + } + // move t values and points together to eliminate small/tiny gaps + if (!move_nearby(contourList DEBUG_COIN_PARAMS())) { + return false; + } + // add coincidence formed by pairing on curve points and endpoints + coincidence->correctEnds(DEBUG_PHASE_ONLY_PARAMS(kIntersecting)); + if (!coincidence->addEndMovedSpans(DEBUG_COIN_ONLY_PARAMS())) { + return false; + } + const int SAFETY_COUNT = 3; + int safetyHatch = SAFETY_COUNT; + // look for coincidence present in A-B and A-C but missing in B-C + do { + bool added; + if (!coincidence->addMissing(&added DEBUG_ITER_PARAMS(SAFETY_COUNT - safetyHatch))) { + return false; + } + if (!added) { + break; + } + if (!--safetyHatch) { + SkASSERT(globalState->debugSkipAssert()); + return false; + } + move_nearby(contourList DEBUG_ITER_PARAMS(SAFETY_COUNT - safetyHatch - 1)); + } while (true); + // check to see if, loosely, coincident ranges may be expanded + if (coincidence->expand(DEBUG_COIN_ONLY_PARAMS())) { + bool added; + if (!coincidence->addMissing(&added DEBUG_COIN_PARAMS())) { + return false; + } + if (!coincidence->addExpanded(DEBUG_COIN_ONLY_PARAMS())) { + return false; + } + if (!move_multiples(contourList DEBUG_COIN_PARAMS())) { + return false; + } + move_nearby(contourList DEBUG_COIN_PARAMS()); + } + // the expanded ranges may not align -- add the missing spans + if (!coincidence->addExpanded(DEBUG_PHASE_ONLY_PARAMS(kWalking))) { + return false; + } + // mark spans of coincident segments as coincident + coincidence->mark(DEBUG_COIN_ONLY_PARAMS()); + // look for coincidence lines and curves undetected by intersection + if (missing_coincidence(contourList DEBUG_COIN_PARAMS())) { + (void) coincidence->expand(DEBUG_PHASE_ONLY_PARAMS(kIntersecting)); + if (!coincidence->addExpanded(DEBUG_COIN_ONLY_PARAMS())) { + return false; + } + if (!coincidence->mark(DEBUG_PHASE_ONLY_PARAMS(kWalking))) { + return false; + } + } else { + (void) coincidence->expand(DEBUG_COIN_ONLY_PARAMS()); + } + (void) coincidence->expand(DEBUG_COIN_ONLY_PARAMS()); + + SkOpCoincidence overlaps(globalState); + safetyHatch = SAFETY_COUNT; + do { + SkOpCoincidence* pairs = overlaps.isEmpty() ? coincidence : &overlaps; + // adjust the winding value to account for coincident edges + if (!pairs->apply(DEBUG_ITER_ONLY_PARAMS(SAFETY_COUNT - safetyHatch))) { + return false; + } + // For each coincident pair that overlaps another, when the receivers (the 1st of the pair) + // are different, construct a new pair to resolve their mutual span + if (!pairs->findOverlaps(&overlaps DEBUG_ITER_PARAMS(SAFETY_COUNT - safetyHatch))) { + return false; + } + if (!--safetyHatch) { + SkASSERT(globalState->debugSkipAssert()); + return false; + } + } while (!overlaps.isEmpty()); + calc_angles(contourList DEBUG_COIN_PARAMS()); + if (!sort_angles(contourList)) { + return false; + } +#if DEBUG_COINCIDENCE_VERBOSE + coincidence->debugShowCoincidence(); +#endif +#if DEBUG_COINCIDENCE + coincidence->debugValidate(); +#endif + SkPathOpsDebug::ShowActiveSpans(contourList); + return true; +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsCommon.h b/gfx/skia/skia/src/pathops/SkPathOpsCommon.h new file mode 100644 index 0000000000..cca3b40421 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsCommon.h @@ -0,0 +1,36 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsCommon_DEFINED +#define SkPathOpsCommon_DEFINED + +#include "include/pathops/SkPathOps.h" +#include "src/pathops/SkPathOpsTypes.h" + +class SkOpAngle; +class SkOpCoincidence; +class SkOpContourHead; +class SkOpSegment; +class SkOpSpan; +class SkOpSpanBase; +class SkPath; + +template class SkTDArray; + +const SkOpAngle* AngleWinding(SkOpSpanBase* start, SkOpSpanBase* end, int* windingPtr, + bool* sortable); +SkOpSegment* FindChase(SkTDArray* chase, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr); +SkOpSpan* FindSortableTop(SkOpContourHead* ); +SkOpSpan* FindUndone(SkOpContourHead* ); +bool FixWinding(SkPath* path); +bool SortContourList(SkOpContourHead** , bool evenOdd, bool oppEvenOdd); +bool HandleCoincidence(SkOpContourHead* , SkOpCoincidence* ); +bool OpDebug(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result + SkDEBUGPARAMS(bool skipAssert) + SkDEBUGPARAMS(const char* testName)); + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsConic.cpp b/gfx/skia/skia/src/pathops/SkPathOpsConic.cpp new file mode 100644 index 0000000000..98b7c50d68 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsConic.cpp @@ -0,0 +1,197 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsConic.h" + +#include "include/core/SkTypes.h" +#include "include/private/base/SkFloatingPoint.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsRect.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include + +struct SkDLine; + +// cribbed from the float version in SkGeometry.cpp +static void conic_deriv_coeff(const double src[], + SkScalar w, + double coeff[3]) { + const double P20 = src[4] - src[0]; + const double P10 = src[2] - src[0]; + const double wP10 = w * P10; + coeff[0] = w * P20 - P20; + coeff[1] = P20 - 2 * wP10; + coeff[2] = wP10; +} + +static double conic_eval_tan(const double coord[], SkScalar w, double t) { + double coeff[3]; + conic_deriv_coeff(coord, w, coeff); + return t * (t * coeff[0] + coeff[1]) + coeff[2]; +} + +int SkDConic::FindExtrema(const double src[], SkScalar w, double t[1]) { + double coeff[3]; + conic_deriv_coeff(src, w, coeff); + + double tValues[2]; + int roots = SkDQuad::RootsValidT(coeff[0], coeff[1], coeff[2], tValues); + // In extreme cases, the number of roots returned can be 2. Pathops + // will fail later on, so there's no advantage to plumbing in an error + // return here. + // SkASSERT(0 == roots || 1 == roots); + + if (1 == roots) { + t[0] = tValues[0]; + return 1; + } + return 0; +} + +SkDVector SkDConic::dxdyAtT(double t) const { + SkDVector result = { + conic_eval_tan(&fPts[0].fX, fWeight, t), + conic_eval_tan(&fPts[0].fY, fWeight, t) + }; + if (result.fX == 0 && result.fY == 0) { + if (zero_or_one(t)) { + result = fPts[2] - fPts[0]; + } else { + // incomplete + SkDebugf("!k"); + } + } + return result; +} + +static double conic_eval_numerator(const double src[], SkScalar w, double t) { + SkASSERT(src); + SkASSERT(t >= 0 && t <= 1); + double src2w = src[2] * w; + double C = src[0]; + double A = src[4] - 2 * src2w + C; + double B = 2 * (src2w - C); + return (A * t + B) * t + C; +} + + +static double conic_eval_denominator(SkScalar w, double t) { + double B = 2 * (w - 1); + double C = 1; + double A = -B; + return (A * t + B) * t + C; +} + +bool SkDConic::hullIntersects(const SkDCubic& cubic, bool* isLinear) const { + return cubic.hullIntersects(*this, isLinear); +} + +SkDPoint SkDConic::ptAtT(double t) const { + if (t == 0) { + return fPts[0]; + } + if (t == 1) { + return fPts[2]; + } + double denominator = conic_eval_denominator(fWeight, t); + SkDPoint result = { + sk_ieee_double_divide(conic_eval_numerator(&fPts[0].fX, fWeight, t), denominator), + sk_ieee_double_divide(conic_eval_numerator(&fPts[0].fY, fWeight, t), denominator) + }; + return result; +} + +/* see quad subdivide for point rationale */ +/* w rationale : the mid point between t1 and t2 could be determined from the computed a/b/c + values if the computed w was known. Since we know the mid point at (t1+t2)/2, we'll assume + that it is the same as the point on the new curve t==(0+1)/2. + + d / dz == conic_poly(dst, unknownW, .5) / conic_weight(unknownW, .5); + + conic_poly(dst, unknownW, .5) + = a / 4 + (b * unknownW) / 2 + c / 4 + = (a + c) / 4 + (bx * unknownW) / 2 + + conic_weight(unknownW, .5) + = unknownW / 2 + 1 / 2 + + d / dz == ((a + c) / 2 + b * unknownW) / (unknownW + 1) + d / dz * (unknownW + 1) == (a + c) / 2 + b * unknownW + unknownW = ((a + c) / 2 - d / dz) / (d / dz - b) + + Thus, w is the ratio of the distance from the mid of end points to the on-curve point, and the + distance of the on-curve point to the control point. + */ +SkDConic SkDConic::subDivide(double t1, double t2) const { + double ax, ay, az; + if (t1 == 0) { + ax = fPts[0].fX; + ay = fPts[0].fY; + az = 1; + } else if (t1 != 1) { + ax = conic_eval_numerator(&fPts[0].fX, fWeight, t1); + ay = conic_eval_numerator(&fPts[0].fY, fWeight, t1); + az = conic_eval_denominator(fWeight, t1); + } else { + ax = fPts[2].fX; + ay = fPts[2].fY; + az = 1; + } + double midT = (t1 + t2) / 2; + double dx = conic_eval_numerator(&fPts[0].fX, fWeight, midT); + double dy = conic_eval_numerator(&fPts[0].fY, fWeight, midT); + double dz = conic_eval_denominator(fWeight, midT); + double cx, cy, cz; + if (t2 == 1) { + cx = fPts[2].fX; + cy = fPts[2].fY; + cz = 1; + } else if (t2 != 0) { + cx = conic_eval_numerator(&fPts[0].fX, fWeight, t2); + cy = conic_eval_numerator(&fPts[0].fY, fWeight, t2); + cz = conic_eval_denominator(fWeight, t2); + } else { + cx = fPts[0].fX; + cy = fPts[0].fY; + cz = 1; + } + double bx = 2 * dx - (ax + cx) / 2; + double by = 2 * dy - (ay + cy) / 2; + double bz = 2 * dz - (az + cz) / 2; + if (!bz) { + bz = 1; // if bz is 0, weight is 0, control point has no effect: any value will do + } + SkDConic dst = {{{{ax / az, ay / az}, {bx / bz, by / bz}, {cx / cz, cy / cz}} + SkDEBUGPARAMS(fPts.fDebugGlobalState) }, + SkDoubleToScalar(bz / sqrt(az * cz)) }; + return dst; +} + +SkDPoint SkDConic::subDivide(const SkDPoint& a, const SkDPoint& c, double t1, double t2, + SkScalar* weight) const { + SkDConic chopped = this->subDivide(t1, t2); + *weight = chopped.fWeight; + return chopped[1]; +} + +int SkTConic::intersectRay(SkIntersections* i, const SkDLine& line) const { + return i->intersectRay(fConic, line); +} + +bool SkTConic::hullIntersects(const SkDQuad& quad, bool* isLinear) const { + return quad.hullIntersects(fConic, isLinear); +} + +bool SkTConic::hullIntersects(const SkDCubic& cubic, bool* isLinear) const { + return cubic.hullIntersects(fConic, isLinear); +} + +void SkTConic::setBounds(SkDRect* rect) const { + rect->setBounds(fConic); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsConic.h b/gfx/skia/skia/src/pathops/SkPathOpsConic.h new file mode 100644 index 0000000000..334dbebb60 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsConic.h @@ -0,0 +1,206 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathOpsConic_DEFINED +#define SkPathOpsConic_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkDebug.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTCurve.h" + +class SkIntersections; +class SkOpGlobalState; +struct SkDCubic; +struct SkDLine; +struct SkDRect; + +struct SkDConic { + static const int kPointCount = 3; + static const int kPointLast = kPointCount - 1; + static const int kMaxIntersections = 4; + + SkDQuad fPts; + SkScalar fWeight; + + bool collapsed() const { + return fPts.collapsed(); + } + + bool controlsInside() const { + return fPts.controlsInside(); + } + + void debugInit() { + fPts.debugInit(); + fWeight = 0; + } + + void debugSet(const SkDPoint* pts, SkScalar weight); + + SkDConic flip() const { + SkDConic result = {{{fPts[2], fPts[1], fPts[0]} + SkDEBUGPARAMS(fPts.fDebugGlobalState) }, fWeight}; + return result; + } + +#ifdef SK_DEBUG + SkOpGlobalState* globalState() const { return fPts.globalState(); } +#endif + + static bool IsConic() { return true; } + + const SkDConic& set(const SkPoint pts[kPointCount], SkScalar weight + SkDEBUGPARAMS(SkOpGlobalState* state = nullptr)) { + fPts.set(pts SkDEBUGPARAMS(state)); + fWeight = weight; + return *this; + } + + const SkDPoint& operator[](int n) const { return fPts[n]; } + SkDPoint& operator[](int n) { return fPts[n]; } + + static int AddValidTs(double s[], int realRoots, double* t) { + return SkDQuad::AddValidTs(s, realRoots, t); + } + + void align(int endIndex, SkDPoint* dstPt) const { + fPts.align(endIndex, dstPt); + } + + SkDVector dxdyAtT(double t) const; + static int FindExtrema(const double src[], SkScalar weight, double tValue[1]); + + bool hullIntersects(const SkDQuad& quad, bool* isLinear) const { + return fPts.hullIntersects(quad, isLinear); + } + + bool hullIntersects(const SkDConic& conic, bool* isLinear) const { + return fPts.hullIntersects(conic.fPts, isLinear); + } + + bool hullIntersects(const SkDCubic& cubic, bool* isLinear) const; + + bool isLinear(int startIndex, int endIndex) const { + return fPts.isLinear(startIndex, endIndex); + } + + static int maxIntersections() { return kMaxIntersections; } + + bool monotonicInX() const { + return fPts.monotonicInX(); + } + + bool monotonicInY() const { + return fPts.monotonicInY(); + } + + void otherPts(int oddMan, const SkDPoint* endPt[2]) const { + fPts.otherPts(oddMan, endPt); + } + + static int pointCount() { return kPointCount; } + static int pointLast() { return kPointLast; } + SkDPoint ptAtT(double t) const; + + static int RootsReal(double A, double B, double C, double t[2]) { + return SkDQuad::RootsReal(A, B, C, t); + } + + static int RootsValidT(const double A, const double B, const double C, double s[2]) { + return SkDQuad::RootsValidT(A, B, C, s); + } + + SkDConic subDivide(double t1, double t2) const; + void subDivide(double t1, double t2, SkDConic* c) const { *c = this->subDivide(t1, t2); } + + static SkDConic SubDivide(const SkPoint a[kPointCount], SkScalar weight, double t1, double t2) { + SkDConic conic; + conic.set(a, weight); + return conic.subDivide(t1, t2); + } + + SkDPoint subDivide(const SkDPoint& a, const SkDPoint& c, double t1, double t2, + SkScalar* weight) const; + + static SkDPoint SubDivide(const SkPoint pts[kPointCount], SkScalar weight, + const SkDPoint& a, const SkDPoint& c, + double t1, double t2, SkScalar* newWeight) { + SkDConic conic; + conic.set(pts, weight); + return conic.subDivide(a, c, t1, t2, newWeight); + } + + // utilities callable by the user from the debugger when the implementation code is linked in + void dump() const; + void dumpID(int id) const; + void dumpInner() const; + +}; + +class SkTConic : public SkTCurve { +public: + SkDConic fConic; + + SkTConic() {} + + SkTConic(const SkDConic& c) + : fConic(c) { + } + + ~SkTConic() override {} + + const SkDPoint& operator[](int n) const override { return fConic[n]; } + SkDPoint& operator[](int n) override { return fConic[n]; } + + bool collapsed() const override { return fConic.collapsed(); } + bool controlsInside() const override { return fConic.controlsInside(); } + void debugInit() override { return fConic.debugInit(); } +#if DEBUG_T_SECT + void dumpID(int id) const override { return fConic.dumpID(id); } +#endif + SkDVector dxdyAtT(double t) const override { return fConic.dxdyAtT(t); } +#ifdef SK_DEBUG + SkOpGlobalState* globalState() const override { return fConic.globalState(); } +#endif + bool hullIntersects(const SkDQuad& quad, bool* isLinear) const override; + + bool hullIntersects(const SkDConic& conic, bool* isLinear) const override { + return conic.hullIntersects(fConic, isLinear); + } + + bool hullIntersects(const SkDCubic& cubic, bool* isLinear) const override; + + bool hullIntersects(const SkTCurve& curve, bool* isLinear) const override { + return curve.hullIntersects(fConic, isLinear); + } + + int intersectRay(SkIntersections* i, const SkDLine& line) const override; + bool IsConic() const override { return true; } + SkTCurve* make(SkArenaAlloc& heap) const override { return heap.make(); } + + int maxIntersections() const override { return SkDConic::kMaxIntersections; } + + void otherPts(int oddMan, const SkDPoint* endPt[2]) const override { + fConic.otherPts(oddMan, endPt); + } + + int pointCount() const override { return SkDConic::kPointCount; } + int pointLast() const override { return SkDConic::kPointLast; } + SkDPoint ptAtT(double t) const override { return fConic.ptAtT(t); } + void setBounds(SkDRect* ) const override; + + void subDivide(double t1, double t2, SkTCurve* curve) const override { + ((SkTConic*) curve)->fConic = fConic.subDivide(t1, t2); + } +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsCubic.cpp b/gfx/skia/skia/src/pathops/SkPathOpsCubic.cpp new file mode 100644 index 0000000000..138072dd72 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsCubic.cpp @@ -0,0 +1,763 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsCubic.h" + +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkTSort.h" +#include "src/core/SkGeometry.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkLineParameters.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsRect.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +struct SkDLine; + +const int SkDCubic::gPrecisionUnit = 256; // FIXME: test different values in test framework + +void SkDCubic::align(int endIndex, int ctrlIndex, SkDPoint* dstPt) const { + if (fPts[endIndex].fX == fPts[ctrlIndex].fX) { + dstPt->fX = fPts[endIndex].fX; + } + if (fPts[endIndex].fY == fPts[ctrlIndex].fY) { + dstPt->fY = fPts[endIndex].fY; + } +} + +// give up when changing t no longer moves point +// also, copy point rather than recompute it when it does change +double SkDCubic::binarySearch(double min, double max, double axisIntercept, + SearchAxis xAxis) const { + double t = (min + max) / 2; + double step = (t - min) / 2; + SkDPoint cubicAtT = ptAtT(t); + double calcPos = (&cubicAtT.fX)[xAxis]; + double calcDist = calcPos - axisIntercept; + do { + double priorT = std::max(min, t - step); + SkDPoint lessPt = ptAtT(priorT); + if (approximately_equal_half(lessPt.fX, cubicAtT.fX) + && approximately_equal_half(lessPt.fY, cubicAtT.fY)) { + return -1; // binary search found no point at this axis intercept + } + double lessDist = (&lessPt.fX)[xAxis] - axisIntercept; +#if DEBUG_CUBIC_BINARY_SEARCH + SkDebugf("t=%1.9g calc=%1.9g dist=%1.9g step=%1.9g less=%1.9g\n", t, calcPos, calcDist, + step, lessDist); +#endif + double lastStep = step; + step /= 2; + if (calcDist > 0 ? calcDist > lessDist : calcDist < lessDist) { + t = priorT; + } else { + double nextT = t + lastStep; + if (nextT > max) { + return -1; + } + SkDPoint morePt = ptAtT(nextT); + if (approximately_equal_half(morePt.fX, cubicAtT.fX) + && approximately_equal_half(morePt.fY, cubicAtT.fY)) { + return -1; // binary search found no point at this axis intercept + } + double moreDist = (&morePt.fX)[xAxis] - axisIntercept; + if (calcDist > 0 ? calcDist <= moreDist : calcDist >= moreDist) { + continue; + } + t = nextT; + } + SkDPoint testAtT = ptAtT(t); + cubicAtT = testAtT; + calcPos = (&cubicAtT.fX)[xAxis]; + calcDist = calcPos - axisIntercept; + } while (!approximately_equal(calcPos, axisIntercept)); + return t; +} + +// get the rough scale of the cubic; used to determine if curvature is extreme +double SkDCubic::calcPrecision() const { + return ((fPts[1] - fPts[0]).length() + + (fPts[2] - fPts[1]).length() + + (fPts[3] - fPts[2]).length()) / gPrecisionUnit; +} + +/* classic one t subdivision */ +static void interp_cubic_coords(const double* src, double* dst, double t) { + double ab = SkDInterp(src[0], src[2], t); + double bc = SkDInterp(src[2], src[4], t); + double cd = SkDInterp(src[4], src[6], t); + double abc = SkDInterp(ab, bc, t); + double bcd = SkDInterp(bc, cd, t); + double abcd = SkDInterp(abc, bcd, t); + + dst[0] = src[0]; + dst[2] = ab; + dst[4] = abc; + dst[6] = abcd; + dst[8] = bcd; + dst[10] = cd; + dst[12] = src[6]; +} + +SkDCubicPair SkDCubic::chopAt(double t) const { + SkDCubicPair dst; + if (t == 0.5) { + dst.pts[0] = fPts[0]; + dst.pts[1].fX = (fPts[0].fX + fPts[1].fX) / 2; + dst.pts[1].fY = (fPts[0].fY + fPts[1].fY) / 2; + dst.pts[2].fX = (fPts[0].fX + 2 * fPts[1].fX + fPts[2].fX) / 4; + dst.pts[2].fY = (fPts[0].fY + 2 * fPts[1].fY + fPts[2].fY) / 4; + dst.pts[3].fX = (fPts[0].fX + 3 * (fPts[1].fX + fPts[2].fX) + fPts[3].fX) / 8; + dst.pts[3].fY = (fPts[0].fY + 3 * (fPts[1].fY + fPts[2].fY) + fPts[3].fY) / 8; + dst.pts[4].fX = (fPts[1].fX + 2 * fPts[2].fX + fPts[3].fX) / 4; + dst.pts[4].fY = (fPts[1].fY + 2 * fPts[2].fY + fPts[3].fY) / 4; + dst.pts[5].fX = (fPts[2].fX + fPts[3].fX) / 2; + dst.pts[5].fY = (fPts[2].fY + fPts[3].fY) / 2; + dst.pts[6] = fPts[3]; + return dst; + } + interp_cubic_coords(&fPts[0].fX, &dst.pts[0].fX, t); + interp_cubic_coords(&fPts[0].fY, &dst.pts[0].fY, t); + return dst; +} + +// TODO(skbug.com/14063) deduplicate this with SkBezierCubic::ConvertToPolynomial +void SkDCubic::Coefficients(const double* src, double* A, double* B, double* C, double* D) { + *A = src[6]; // d + *B = src[4] * 3; // 3*c + *C = src[2] * 3; // 3*b + *D = src[0]; // a + *A -= *D - *C + *B; // A = -a + 3*b - 3*c + d + *B += 3 * *D - 2 * *C; // B = 3*a - 6*b + 3*c + *C -= 3 * *D; // C = -3*a + 3*b +} + +bool SkDCubic::endsAreExtremaInXOrY() const { + return (between(fPts[0].fX, fPts[1].fX, fPts[3].fX) + && between(fPts[0].fX, fPts[2].fX, fPts[3].fX)) + || (between(fPts[0].fY, fPts[1].fY, fPts[3].fY) + && between(fPts[0].fY, fPts[2].fY, fPts[3].fY)); +} + +// Do a quick reject by rotating all points relative to a line formed by +// a pair of one cubic's points. If the 2nd cubic's points +// are on the line or on the opposite side from the 1st cubic's 'odd man', the +// curves at most intersect at the endpoints. +/* if returning true, check contains true if cubic's hull collapsed, making the cubic linear + if returning false, check contains true if the the cubic pair have only the end point in common +*/ +bool SkDCubic::hullIntersects(const SkDPoint* pts, int ptCount, bool* isLinear) const { + bool linear = true; + char hullOrder[4]; + int hullCount = convexHull(hullOrder); + int end1 = hullOrder[0]; + int hullIndex = 0; + const SkDPoint* endPt[2]; + endPt[0] = &fPts[end1]; + do { + hullIndex = (hullIndex + 1) % hullCount; + int end2 = hullOrder[hullIndex]; + endPt[1] = &fPts[end2]; + double origX = endPt[0]->fX; + double origY = endPt[0]->fY; + double adj = endPt[1]->fX - origX; + double opp = endPt[1]->fY - origY; + int oddManMask = other_two(end1, end2); + int oddMan = end1 ^ oddManMask; + double sign = (fPts[oddMan].fY - origY) * adj - (fPts[oddMan].fX - origX) * opp; + int oddMan2 = end2 ^ oddManMask; + double sign2 = (fPts[oddMan2].fY - origY) * adj - (fPts[oddMan2].fX - origX) * opp; + if (sign * sign2 < 0) { + continue; + } + if (approximately_zero(sign)) { + sign = sign2; + if (approximately_zero(sign)) { + continue; + } + } + linear = false; + bool foundOutlier = false; + for (int n = 0; n < ptCount; ++n) { + double test = (pts[n].fY - origY) * adj - (pts[n].fX - origX) * opp; + if (test * sign > 0 && !precisely_zero(test)) { + foundOutlier = true; + break; + } + } + if (!foundOutlier) { + return false; + } + endPt[0] = endPt[1]; + end1 = end2; + } while (hullIndex); + *isLinear = linear; + return true; +} + +bool SkDCubic::hullIntersects(const SkDCubic& c2, bool* isLinear) const { + return hullIntersects(c2.fPts, SkDCubic::kPointCount, isLinear); +} + +bool SkDCubic::hullIntersects(const SkDQuad& quad, bool* isLinear) const { + return hullIntersects(quad.fPts, SkDQuad::kPointCount, isLinear); +} + +bool SkDCubic::hullIntersects(const SkDConic& conic, bool* isLinear) const { + + return hullIntersects(conic.fPts, isLinear); +} + +bool SkDCubic::isLinear(int startIndex, int endIndex) const { + if (fPts[0].approximatelyDEqual(fPts[3])) { + return ((const SkDQuad *) this)->isLinear(0, 2); + } + SkLineParameters lineParameters; + lineParameters.cubicEndPoints(*this, startIndex, endIndex); + // FIXME: maybe it's possible to avoid this and compare non-normalized + lineParameters.normalize(); + double tiniest = std::min(std::min(std::min(std::min(std::min(std::min(std::min(fPts[0].fX, fPts[0].fY), + fPts[1].fX), fPts[1].fY), fPts[2].fX), fPts[2].fY), fPts[3].fX), fPts[3].fY); + double largest = std::max(std::max(std::max(std::max(std::max(std::max(std::max(fPts[0].fX, fPts[0].fY), + fPts[1].fX), fPts[1].fY), fPts[2].fX), fPts[2].fY), fPts[3].fX), fPts[3].fY); + largest = std::max(largest, -tiniest); + double distance = lineParameters.controlPtDistance(*this, 1); + if (!approximately_zero_when_compared_to(distance, largest)) { + return false; + } + distance = lineParameters.controlPtDistance(*this, 2); + return approximately_zero_when_compared_to(distance, largest); +} + +// from http://www.cs.sunysb.edu/~qin/courses/geometry/4.pdf +// c(t) = a(1-t)^3 + 3bt(1-t)^2 + 3c(1-t)t^2 + dt^3 +// c'(t) = -3a(1-t)^2 + 3b((1-t)^2 - 2t(1-t)) + 3c(2t(1-t) - t^2) + 3dt^2 +// = 3(b-a)(1-t)^2 + 6(c-b)t(1-t) + 3(d-c)t^2 +static double derivative_at_t(const double* src, double t) { + double one_t = 1 - t; + double a = src[0]; + double b = src[2]; + double c = src[4]; + double d = src[6]; + return 3 * ((b - a) * one_t * one_t + 2 * (c - b) * t * one_t + (d - c) * t * t); +} + +int SkDCubic::ComplexBreak(const SkPoint pointsPtr[4], SkScalar* t) { + SkDCubic cubic; + cubic.set(pointsPtr); + if (cubic.monotonicInX() && cubic.monotonicInY()) { + return 0; + } + double tt[2], ss[2]; + SkCubicType cubicType = SkClassifyCubic(pointsPtr, tt, ss); + switch (cubicType) { + case SkCubicType::kLoop: { + const double &td = tt[0], &te = tt[1], &sd = ss[0], &se = ss[1]; + if (roughly_between(0, td, sd) && roughly_between(0, te, se)) { + t[0] = static_cast((td * se + te * sd) / (2 * sd * se)); + return (int) (t[0] > 0 && t[0] < 1); + } + } + [[fallthrough]]; // fall through if no t value found + case SkCubicType::kSerpentine: + case SkCubicType::kLocalCusp: + case SkCubicType::kCuspAtInfinity: { + double inflectionTs[2]; + int infTCount = cubic.findInflections(inflectionTs); + double maxCurvature[3]; + int roots = cubic.findMaxCurvature(maxCurvature); + #if DEBUG_CUBIC_SPLIT + SkDebugf("%s\n", __FUNCTION__); + cubic.dump(); + for (int index = 0; index < infTCount; ++index) { + SkDebugf("inflectionsTs[%d]=%1.9g ", index, inflectionTs[index]); + SkDPoint pt = cubic.ptAtT(inflectionTs[index]); + SkDVector dPt = cubic.dxdyAtT(inflectionTs[index]); + SkDLine perp = {{pt - dPt, pt + dPt}}; + perp.dump(); + } + for (int index = 0; index < roots; ++index) { + SkDebugf("maxCurvature[%d]=%1.9g ", index, maxCurvature[index]); + SkDPoint pt = cubic.ptAtT(maxCurvature[index]); + SkDVector dPt = cubic.dxdyAtT(maxCurvature[index]); + SkDLine perp = {{pt - dPt, pt + dPt}}; + perp.dump(); + } + #endif + if (infTCount == 2) { + for (int index = 0; index < roots; ++index) { + if (between(inflectionTs[0], maxCurvature[index], inflectionTs[1])) { + t[0] = maxCurvature[index]; + return (int) (t[0] > 0 && t[0] < 1); + } + } + } else { + int resultCount = 0; + // FIXME: constant found through experimentation -- maybe there's a better way.... + double precision = cubic.calcPrecision() * 2; + for (int index = 0; index < roots; ++index) { + double testT = maxCurvature[index]; + if (0 >= testT || testT >= 1) { + continue; + } + // don't call dxdyAtT since we want (0,0) results + SkDVector dPt = { derivative_at_t(&cubic.fPts[0].fX, testT), + derivative_at_t(&cubic.fPts[0].fY, testT) }; + double dPtLen = dPt.length(); + if (dPtLen < precision) { + t[resultCount++] = testT; + } + } + if (!resultCount && infTCount == 1) { + t[0] = inflectionTs[0]; + resultCount = (int) (t[0] > 0 && t[0] < 1); + } + return resultCount; + } + break; + } + default: + break; + } + return 0; +} + +bool SkDCubic::monotonicInX() const { + return precisely_between(fPts[0].fX, fPts[1].fX, fPts[3].fX) + && precisely_between(fPts[0].fX, fPts[2].fX, fPts[3].fX); +} + +bool SkDCubic::monotonicInY() const { + return precisely_between(fPts[0].fY, fPts[1].fY, fPts[3].fY) + && precisely_between(fPts[0].fY, fPts[2].fY, fPts[3].fY); +} + +void SkDCubic::otherPts(int index, const SkDPoint* o1Pts[kPointCount - 1]) const { + int offset = (int) !SkToBool(index); + o1Pts[0] = &fPts[offset]; + o1Pts[1] = &fPts[++offset]; + o1Pts[2] = &fPts[++offset]; +} + +int SkDCubic::searchRoots(double extremeTs[6], int extrema, double axisIntercept, + SearchAxis xAxis, double* validRoots) const { + extrema += findInflections(&extremeTs[extrema]); + extremeTs[extrema++] = 0; + extremeTs[extrema] = 1; + SkASSERT(extrema < 6); + SkTQSort(extremeTs, extremeTs + extrema + 1); + int validCount = 0; + for (int index = 0; index < extrema; ) { + double min = extremeTs[index]; + double max = extremeTs[++index]; + if (min == max) { + continue; + } + double newT = binarySearch(min, max, axisIntercept, xAxis); + if (newT >= 0) { + if (validCount >= 3) { + return 0; + } + validRoots[validCount++] = newT; + } + } + return validCount; +} + +// cubic roots + +static const double PI = 3.141592653589793; + +// from SkGeometry.cpp (and Numeric Solutions, 5.6) +// // TODO(skbug.com/14063) Deduplicate with SkCubics::RootsValidT +int SkDCubic::RootsValidT(double A, double B, double C, double D, double t[3]) { + double s[3]; + int realRoots = RootsReal(A, B, C, D, s); + int foundRoots = SkDQuad::AddValidTs(s, realRoots, t); + for (int index = 0; index < realRoots; ++index) { + double tValue = s[index]; + if (!approximately_one_or_less(tValue) && between(1, tValue, 1.00005)) { + for (int idx2 = 0; idx2 < foundRoots; ++idx2) { + if (approximately_equal(t[idx2], 1)) { + goto nextRoot; + } + } + SkASSERT(foundRoots < 3); + t[foundRoots++] = 1; + } else if (!approximately_zero_or_more(tValue) && between(-0.00005, tValue, 0)) { + for (int idx2 = 0; idx2 < foundRoots; ++idx2) { + if (approximately_equal(t[idx2], 0)) { + goto nextRoot; + } + } + SkASSERT(foundRoots < 3); + t[foundRoots++] = 0; + } +nextRoot: + ; + } + return foundRoots; +} + +// TODO(skbug.com/14063) Deduplicate with SkCubics::RootsReal +int SkDCubic::RootsReal(double A, double B, double C, double D, double s[3]) { +#ifdef SK_DEBUG + #if ONE_OFF_DEBUG && ONE_OFF_DEBUG_MATHEMATICA + // create a string mathematica understands + // GDB set print repe 15 # if repeated digits is a bother + // set print elements 400 # if line doesn't fit + char str[1024]; + sk_bzero(str, sizeof(str)); + snprintf(str, sizeof(str), "Solve[%1.19g x^3 + %1.19g x^2 + %1.19g x + %1.19g == 0, x]", + A, B, C, D); + SkPathOpsDebug::MathematicaIze(str, sizeof(str)); + SkDebugf("%s\n", str); + #endif +#endif + if (approximately_zero(A) + && approximately_zero_when_compared_to(A, B) + && approximately_zero_when_compared_to(A, C) + && approximately_zero_when_compared_to(A, D)) { // we're just a quadratic + return SkDQuad::RootsReal(B, C, D, s); + } + if (approximately_zero_when_compared_to(D, A) + && approximately_zero_when_compared_to(D, B) + && approximately_zero_when_compared_to(D, C)) { // 0 is one root + int num = SkDQuad::RootsReal(A, B, C, s); + for (int i = 0; i < num; ++i) { + if (approximately_zero(s[i])) { + return num; + } + } + s[num++] = 0; + return num; + } + if (approximately_zero(A + B + C + D)) { // 1 is one root + int num = SkDQuad::RootsReal(A, A + B, -D, s); + for (int i = 0; i < num; ++i) { + if (AlmostDequalUlps(s[i], 1)) { + return num; + } + } + s[num++] = 1; + return num; + } + double a, b, c; + { + double invA = 1 / A; + a = B * invA; + b = C * invA; + c = D * invA; + } + double a2 = a * a; + double Q = (a2 - b * 3) / 9; + double R = (2 * a2 * a - 9 * a * b + 27 * c) / 54; + double R2 = R * R; + double Q3 = Q * Q * Q; + double R2MinusQ3 = R2 - Q3; + double adiv3 = a / 3; + double r; + double* roots = s; + if (R2MinusQ3 < 0) { // we have 3 real roots + // the divide/root can, due to finite precisions, be slightly outside of -1...1 + double theta = acos(SkTPin(R / sqrt(Q3), -1., 1.)); + double neg2RootQ = -2 * sqrt(Q); + + r = neg2RootQ * cos(theta / 3) - adiv3; + *roots++ = r; + + r = neg2RootQ * cos((theta + 2 * PI) / 3) - adiv3; + if (!AlmostDequalUlps(s[0], r)) { + *roots++ = r; + } + r = neg2RootQ * cos((theta - 2 * PI) / 3) - adiv3; + if (!AlmostDequalUlps(s[0], r) && (roots - s == 1 || !AlmostDequalUlps(s[1], r))) { + *roots++ = r; + } + } else { // we have 1 real root + double sqrtR2MinusQ3 = sqrt(R2MinusQ3); + A = fabs(R) + sqrtR2MinusQ3; + A = std::cbrt(A); // cube root + if (R > 0) { + A = -A; + } + if (A != 0) { + A += Q / A; + } + r = A - adiv3; + *roots++ = r; + if (AlmostDequalUlps((double) R2, (double) Q3)) { + r = -A / 2 - adiv3; + if (!AlmostDequalUlps(s[0], r)) { + *roots++ = r; + } + } + } + return static_cast(roots - s); +} + +// OPTIMIZE? compute t^2, t(1-t), and (1-t)^2 and pass them to another version of derivative at t? +SkDVector SkDCubic::dxdyAtT(double t) const { + SkDVector result = { derivative_at_t(&fPts[0].fX, t), derivative_at_t(&fPts[0].fY, t) }; + if (result.fX == 0 && result.fY == 0) { + if (t == 0) { + result = fPts[2] - fPts[0]; + } else if (t == 1) { + result = fPts[3] - fPts[1]; + } else { + // incomplete + SkDebugf("!c"); + } + if (result.fX == 0 && result.fY == 0 && zero_or_one(t)) { + result = fPts[3] - fPts[0]; + } + } + return result; +} + +// OPTIMIZE? share code with formulate_F1DotF2 +// e.g. https://stackoverflow.com/a/35927917 +int SkDCubic::findInflections(double tValues[2]) const { + double Ax = fPts[1].fX - fPts[0].fX; + double Ay = fPts[1].fY - fPts[0].fY; + double Bx = fPts[2].fX - 2 * fPts[1].fX + fPts[0].fX; + double By = fPts[2].fY - 2 * fPts[1].fY + fPts[0].fY; + double Cx = fPts[3].fX + 3 * (fPts[1].fX - fPts[2].fX) - fPts[0].fX; + double Cy = fPts[3].fY + 3 * (fPts[1].fY - fPts[2].fY) - fPts[0].fY; + return SkDQuad::RootsValidT(Bx * Cy - By * Cx, Ax * Cy - Ay * Cx, Ax * By - Ay * Bx, tValues); +} + +static void formulate_F1DotF2(const double src[], double coeff[4]) { + double a = src[2] - src[0]; + double b = src[4] - 2 * src[2] + src[0]; + double c = src[6] + 3 * (src[2] - src[4]) - src[0]; + coeff[0] = c * c; + coeff[1] = 3 * b * c; + coeff[2] = 2 * b * b + c * a; + coeff[3] = a * b; +} + +/** SkDCubic'(t) = At^2 + Bt + C, where + A = 3(-a + 3(b - c) + d) + B = 6(a - 2b + c) + C = 3(b - a) + Solve for t, keeping only those that fit between 0 < t < 1 +*/ +int SkDCubic::FindExtrema(const double src[], double tValues[2]) { + // we divide A,B,C by 3 to simplify + double a = src[0]; + double b = src[2]; + double c = src[4]; + double d = src[6]; + double A = d - a + 3 * (b - c); + double B = 2 * (a - b - b + c); + double C = b - a; + + return SkDQuad::RootsValidT(A, B, C, tValues); +} + +/* from SkGeometry.cpp + Looking for F' dot F'' == 0 + + A = b - a + B = c - 2b + a + C = d - 3c + 3b - a + + F' = 3Ct^2 + 6Bt + 3A + F'' = 6Ct + 6B + + F' dot F'' -> CCt^3 + 3BCt^2 + (2BB + CA)t + AB +*/ +int SkDCubic::findMaxCurvature(double tValues[]) const { + double coeffX[4], coeffY[4]; + int i; + formulate_F1DotF2(&fPts[0].fX, coeffX); + formulate_F1DotF2(&fPts[0].fY, coeffY); + for (i = 0; i < 4; i++) { + coeffX[i] = coeffX[i] + coeffY[i]; + } + return RootsValidT(coeffX[0], coeffX[1], coeffX[2], coeffX[3], tValues); +} + +SkDPoint SkDCubic::ptAtT(double t) const { + if (0 == t) { + return fPts[0]; + } + if (1 == t) { + return fPts[3]; + } + double one_t = 1 - t; + double one_t2 = one_t * one_t; + double a = one_t2 * one_t; + double b = 3 * one_t2 * t; + double t2 = t * t; + double c = 3 * one_t * t2; + double d = t2 * t; + SkDPoint result = {a * fPts[0].fX + b * fPts[1].fX + c * fPts[2].fX + d * fPts[3].fX, + a * fPts[0].fY + b * fPts[1].fY + c * fPts[2].fY + d * fPts[3].fY}; + return result; +} + +/* + Given a cubic c, t1, and t2, find a small cubic segment. + + The new cubic is defined as points A, B, C, and D, where + s1 = 1 - t1 + s2 = 1 - t2 + A = c[0]*s1*s1*s1 + 3*c[1]*s1*s1*t1 + 3*c[2]*s1*t1*t1 + c[3]*t1*t1*t1 + D = c[0]*s2*s2*s2 + 3*c[1]*s2*s2*t2 + 3*c[2]*s2*t2*t2 + c[3]*t2*t2*t2 + + We don't have B or C. So We define two equations to isolate them. + First, compute two reference T values 1/3 and 2/3 from t1 to t2: + + c(at (2*t1 + t2)/3) == E + c(at (t1 + 2*t2)/3) == F + + Next, compute where those values must be if we know the values of B and C: + + _12 = A*2/3 + B*1/3 + 12_ = A*1/3 + B*2/3 + _23 = B*2/3 + C*1/3 + 23_ = B*1/3 + C*2/3 + _34 = C*2/3 + D*1/3 + 34_ = C*1/3 + D*2/3 + _123 = (A*2/3 + B*1/3)*2/3 + (B*2/3 + C*1/3)*1/3 = A*4/9 + B*4/9 + C*1/9 + 123_ = (A*1/3 + B*2/3)*1/3 + (B*1/3 + C*2/3)*2/3 = A*1/9 + B*4/9 + C*4/9 + _234 = (B*2/3 + C*1/3)*2/3 + (C*2/3 + D*1/3)*1/3 = B*4/9 + C*4/9 + D*1/9 + 234_ = (B*1/3 + C*2/3)*1/3 + (C*1/3 + D*2/3)*2/3 = B*1/9 + C*4/9 + D*4/9 + _1234 = (A*4/9 + B*4/9 + C*1/9)*2/3 + (B*4/9 + C*4/9 + D*1/9)*1/3 + = A*8/27 + B*12/27 + C*6/27 + D*1/27 + = E + 1234_ = (A*1/9 + B*4/9 + C*4/9)*1/3 + (B*1/9 + C*4/9 + D*4/9)*2/3 + = A*1/27 + B*6/27 + C*12/27 + D*8/27 + = F + E*27 = A*8 + B*12 + C*6 + D + F*27 = A + B*6 + C*12 + D*8 + +Group the known values on one side: + + M = E*27 - A*8 - D = B*12 + C* 6 + N = F*27 - A - D*8 = B* 6 + C*12 + M*2 - N = B*18 + N*2 - M = C*18 + B = (M*2 - N)/18 + C = (N*2 - M)/18 + */ + +static double interp_cubic_coords(const double* src, double t) { + double ab = SkDInterp(src[0], src[2], t); + double bc = SkDInterp(src[2], src[4], t); + double cd = SkDInterp(src[4], src[6], t); + double abc = SkDInterp(ab, bc, t); + double bcd = SkDInterp(bc, cd, t); + double abcd = SkDInterp(abc, bcd, t); + return abcd; +} + +SkDCubic SkDCubic::subDivide(double t1, double t2) const { + if (t1 == 0 || t2 == 1) { + if (t1 == 0 && t2 == 1) { + return *this; + } + SkDCubicPair pair = chopAt(t1 == 0 ? t2 : t1); + SkDCubic dst = t1 == 0 ? pair.first() : pair.second(); + return dst; + } + SkDCubic dst; + double ax = dst[0].fX = interp_cubic_coords(&fPts[0].fX, t1); + double ay = dst[0].fY = interp_cubic_coords(&fPts[0].fY, t1); + double ex = interp_cubic_coords(&fPts[0].fX, (t1*2+t2)/3); + double ey = interp_cubic_coords(&fPts[0].fY, (t1*2+t2)/3); + double fx = interp_cubic_coords(&fPts[0].fX, (t1+t2*2)/3); + double fy = interp_cubic_coords(&fPts[0].fY, (t1+t2*2)/3); + double dx = dst[3].fX = interp_cubic_coords(&fPts[0].fX, t2); + double dy = dst[3].fY = interp_cubic_coords(&fPts[0].fY, t2); + double mx = ex * 27 - ax * 8 - dx; + double my = ey * 27 - ay * 8 - dy; + double nx = fx * 27 - ax - dx * 8; + double ny = fy * 27 - ay - dy * 8; + /* bx = */ dst[1].fX = (mx * 2 - nx) / 18; + /* by = */ dst[1].fY = (my * 2 - ny) / 18; + /* cx = */ dst[2].fX = (nx * 2 - mx) / 18; + /* cy = */ dst[2].fY = (ny * 2 - my) / 18; + // FIXME: call align() ? + return dst; +} + +void SkDCubic::subDivide(const SkDPoint& a, const SkDPoint& d, + double t1, double t2, SkDPoint dst[2]) const { + SkASSERT(t1 != t2); + // this approach assumes that the control points computed directly are accurate enough + SkDCubic sub = subDivide(t1, t2); + dst[0] = sub[1] + (a - sub[0]); + dst[1] = sub[2] + (d - sub[3]); + if (t1 == 0 || t2 == 0) { + align(0, 1, t1 == 0 ? &dst[0] : &dst[1]); + } + if (t1 == 1 || t2 == 1) { + align(3, 2, t1 == 1 ? &dst[0] : &dst[1]); + } + if (AlmostBequalUlps(dst[0].fX, a.fX)) { + dst[0].fX = a.fX; + } + if (AlmostBequalUlps(dst[0].fY, a.fY)) { + dst[0].fY = a.fY; + } + if (AlmostBequalUlps(dst[1].fX, d.fX)) { + dst[1].fX = d.fX; + } + if (AlmostBequalUlps(dst[1].fY, d.fY)) { + dst[1].fY = d.fY; + } +} + +bool SkDCubic::toFloatPoints(SkPoint* pts) const { + const double* dCubic = &fPts[0].fX; + SkScalar* cubic = &pts[0].fX; + for (int index = 0; index < kPointCount * 2; ++index) { + cubic[index] = SkDoubleToScalar(dCubic[index]); + if (SkScalarAbs(cubic[index]) < FLT_EPSILON_ORDERABLE_ERR) { + cubic[index] = 0; + } + } + return SkScalarsAreFinite(&pts->fX, kPointCount * 2); +} + +double SkDCubic::top(const SkDCubic& dCurve, double startT, double endT, SkDPoint*topPt) const { + double extremeTs[2]; + double topT = -1; + int roots = SkDCubic::FindExtrema(&fPts[0].fY, extremeTs); + for (int index = 0; index < roots; ++index) { + double t = startT + (endT - startT) * extremeTs[index]; + SkDPoint mid = dCurve.ptAtT(t); + if (topPt->fY > mid.fY || (topPt->fY == mid.fY && topPt->fX > mid.fX)) { + topT = t; + *topPt = mid; + } + } + return topT; +} + +int SkTCubic::intersectRay(SkIntersections* i, const SkDLine& line) const { + return i->intersectRay(fCubic, line); +} + +bool SkTCubic::hullIntersects(const SkDQuad& quad, bool* isLinear) const { + return quad.hullIntersects(fCubic, isLinear); +} + +bool SkTCubic::hullIntersects(const SkDConic& conic, bool* isLinear) const { + return conic.hullIntersects(fCubic, isLinear); +} + +void SkTCubic::setBounds(SkDRect* rect) const { + rect->setBounds(fCubic); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsCubic.h b/gfx/skia/skia/src/pathops/SkPathOpsCubic.h new file mode 100644 index 0000000000..242ca34bdc --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsCubic.h @@ -0,0 +1,252 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathOpsCubic_DEFINED +#define SkPathOpsCubic_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTCurve.h" + +class SkIntersections; +class SkOpGlobalState; +struct SkDConic; +struct SkDCubicPair; +struct SkDLine; +struct SkDQuad; +struct SkDRect; + +struct SkDCubic { + static const int kPointCount = 4; + static const int kPointLast = kPointCount - 1; + static const int kMaxIntersections = 9; + + enum SearchAxis { + kXAxis, + kYAxis + }; + + bool collapsed() const { + return fPts[0].approximatelyEqual(fPts[1]) && fPts[0].approximatelyEqual(fPts[2]) + && fPts[0].approximatelyEqual(fPts[3]); + } + + bool controlsInside() const { + SkDVector v01 = fPts[0] - fPts[1]; + SkDVector v02 = fPts[0] - fPts[2]; + SkDVector v03 = fPts[0] - fPts[3]; + SkDVector v13 = fPts[1] - fPts[3]; + SkDVector v23 = fPts[2] - fPts[3]; + return v03.dot(v01) > 0 && v03.dot(v02) > 0 && v03.dot(v13) > 0 && v03.dot(v23) > 0; + } + + static bool IsConic() { return false; } + + const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < kPointCount); return fPts[n]; } + SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < kPointCount); return fPts[n]; } + + void align(int endIndex, int ctrlIndex, SkDPoint* dstPt) const; + double binarySearch(double min, double max, double axisIntercept, SearchAxis xAxis) const; + double calcPrecision() const; + SkDCubicPair chopAt(double t) const; + static void Coefficients(const double* cubic, double* A, double* B, double* C, double* D); + static int ComplexBreak(const SkPoint pts[4], SkScalar* t); + int convexHull(char order[kPointCount]) const; + + void debugInit() { + sk_bzero(fPts, sizeof(fPts)); + } + + void debugSet(const SkDPoint* pts); + + void dump() const; // callable from the debugger when the implementation code is linked in + void dumpID(int id) const; + void dumpInner() const; + SkDVector dxdyAtT(double t) const; + bool endsAreExtremaInXOrY() const; + static int FindExtrema(const double src[], double tValue[2]); + int findInflections(double tValues[2]) const; + + static int FindInflections(const SkPoint a[kPointCount], double tValues[2]) { + SkDCubic cubic; + return cubic.set(a).findInflections(tValues); + } + + int findMaxCurvature(double tValues[]) const; + +#ifdef SK_DEBUG + SkOpGlobalState* globalState() const { return fDebugGlobalState; } +#endif + + bool hullIntersects(const SkDCubic& c2, bool* isLinear) const; + bool hullIntersects(const SkDConic& c, bool* isLinear) const; + bool hullIntersects(const SkDQuad& c2, bool* isLinear) const; + bool hullIntersects(const SkDPoint* pts, int ptCount, bool* isLinear) const; + bool isLinear(int startIndex, int endIndex) const; + static int maxIntersections() { return kMaxIntersections; } + bool monotonicInX() const; + bool monotonicInY() const; + void otherPts(int index, const SkDPoint* o1Pts[kPointCount - 1]) const; + static int pointCount() { return kPointCount; } + static int pointLast() { return kPointLast; } + SkDPoint ptAtT(double t) const; + static int RootsReal(double A, double B, double C, double D, double t[3]); + static int RootsValidT(const double A, const double B, const double C, double D, double s[3]); + + int searchRoots(double extremes[6], int extrema, double axisIntercept, + SearchAxis xAxis, double* validRoots) const; + + bool toFloatPoints(SkPoint* ) const; + /** + * Return the number of valid roots (0 < root < 1) for this cubic intersecting the + * specified horizontal line. + */ + int horizontalIntersect(double yIntercept, double roots[3]) const; + /** + * Return the number of valid roots (0 < root < 1) for this cubic intersecting the + * specified vertical line. + */ + int verticalIntersect(double xIntercept, double roots[3]) const; + +// add debug only global pointer so asserts can be skipped by fuzzers + const SkDCubic& set(const SkPoint pts[kPointCount] + SkDEBUGPARAMS(SkOpGlobalState* state = nullptr)) { + fPts[0] = pts[0]; + fPts[1] = pts[1]; + fPts[2] = pts[2]; + fPts[3] = pts[3]; + SkDEBUGCODE(fDebugGlobalState = state); + return *this; + } + + SkDCubic subDivide(double t1, double t2) const; + void subDivide(double t1, double t2, SkDCubic* c) const { *c = this->subDivide(t1, t2); } + + static SkDCubic SubDivide(const SkPoint a[kPointCount], double t1, double t2) { + SkDCubic cubic; + return cubic.set(a).subDivide(t1, t2); + } + + void subDivide(const SkDPoint& a, const SkDPoint& d, double t1, double t2, SkDPoint p[2]) const; + + static void SubDivide(const SkPoint pts[kPointCount], const SkDPoint& a, const SkDPoint& d, double t1, + double t2, SkDPoint p[2]) { + SkDCubic cubic; + cubic.set(pts).subDivide(a, d, t1, t2, p); + } + + double top(const SkDCubic& dCurve, double startT, double endT, SkDPoint*topPt) const; + SkDQuad toQuad() const; + + static const int gPrecisionUnit; + SkDPoint fPts[kPointCount]; + SkDEBUGCODE(SkOpGlobalState* fDebugGlobalState); +}; + +/* Given the set [0, 1, 2, 3], and two of the four members, compute an XOR mask + that computes the other two. Note that: + + one ^ two == 3 for (0, 3), (1, 2) + one ^ two < 3 for (0, 1), (0, 2), (1, 3), (2, 3) + 3 - (one ^ two) is either 0, 1, or 2 + 1 >> (3 - (one ^ two)) is either 0 or 1 +thus: + returned == 2 for (0, 3), (1, 2) + returned == 3 for (0, 1), (0, 2), (1, 3), (2, 3) +given that: + (0, 3) ^ 2 -> (2, 1) (1, 2) ^ 2 -> (3, 0) + (0, 1) ^ 3 -> (3, 2) (0, 2) ^ 3 -> (3, 1) (1, 3) ^ 3 -> (2, 0) (2, 3) ^ 3 -> (1, 0) +*/ +inline int other_two(int one, int two) { + return 1 >> (3 - (one ^ two)) ^ 3; +} + +struct SkDCubicPair { + SkDCubic first() const { +#ifdef SK_DEBUG + SkDCubic result; + result.debugSet(&pts[0]); + return result; +#else + return (const SkDCubic&) pts[0]; +#endif + } + SkDCubic second() const { +#ifdef SK_DEBUG + SkDCubic result; + result.debugSet(&pts[3]); + return result; +#else + return (const SkDCubic&) pts[3]; +#endif + } + SkDPoint pts[7]; +}; + +class SkTCubic : public SkTCurve { +public: + SkDCubic fCubic; + + SkTCubic() {} + + SkTCubic(const SkDCubic& c) + : fCubic(c) { + } + + ~SkTCubic() override {} + + const SkDPoint& operator[](int n) const override { return fCubic[n]; } + SkDPoint& operator[](int n) override { return fCubic[n]; } + + bool collapsed() const override { return fCubic.collapsed(); } + bool controlsInside() const override { return fCubic.controlsInside(); } + void debugInit() override { return fCubic.debugInit(); } +#if DEBUG_T_SECT + void dumpID(int id) const override { return fCubic.dumpID(id); } +#endif + SkDVector dxdyAtT(double t) const override { return fCubic.dxdyAtT(t); } +#ifdef SK_DEBUG + SkOpGlobalState* globalState() const override { return fCubic.globalState(); } +#endif + bool hullIntersects(const SkDQuad& quad, bool* isLinear) const override; + bool hullIntersects(const SkDConic& conic, bool* isLinear) const override; + + bool hullIntersects(const SkDCubic& cubic, bool* isLinear) const override { + return cubic.hullIntersects(fCubic, isLinear); + } + + bool hullIntersects(const SkTCurve& curve, bool* isLinear) const override { + return curve.hullIntersects(fCubic, isLinear); + } + + int intersectRay(SkIntersections* i, const SkDLine& line) const override; + bool IsConic() const override { return false; } + SkTCurve* make(SkArenaAlloc& heap) const override { return heap.make(); } + + int maxIntersections() const override { return SkDCubic::kMaxIntersections; } + + void otherPts(int oddMan, const SkDPoint* endPt[2]) const override { + fCubic.otherPts(oddMan, endPt); + } + + int pointCount() const override { return SkDCubic::kPointCount; } + int pointLast() const override { return SkDCubic::kPointLast; } + SkDPoint ptAtT(double t) const override { return fCubic.ptAtT(t); } + void setBounds(SkDRect* ) const override; + + void subDivide(double t1, double t2, SkTCurve* curve) const override { + ((SkTCubic*) curve)->fCubic = fCubic.subDivide(t1, t2); + } +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsCurve.cpp b/gfx/skia/skia/src/pathops/SkPathOpsCurve.cpp new file mode 100644 index 0000000000..ad02d61116 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsCurve.cpp @@ -0,0 +1,143 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsCurve.h" + +#include "include/private/base/SkTemplates.h" +#include "src/pathops/SkPathOpsBounds.h" +#include "src/pathops/SkPathOpsRect.h" + +#include +#include + + // this cheats and assumes that the perpendicular to the point is the closest ray to the curve + // this case (where the line and the curve are nearly coincident) may be the only case that counts +double SkDCurve::nearPoint(SkPath::Verb verb, const SkDPoint& xy, const SkDPoint& opp) const { + int count = SkPathOpsVerbToPoints(verb); + double minX = fCubic.fPts[0].fX; + double maxX = minX; + for (int index = 1; index <= count; ++index) { + minX = std::min(minX, fCubic.fPts[index].fX); + maxX = std::max(maxX, fCubic.fPts[index].fX); + } + if (!AlmostBetweenUlps(minX, xy.fX, maxX)) { + return -1; + } + double minY = fCubic.fPts[0].fY; + double maxY = minY; + for (int index = 1; index <= count; ++index) { + minY = std::min(minY, fCubic.fPts[index].fY); + maxY = std::max(maxY, fCubic.fPts[index].fY); + } + if (!AlmostBetweenUlps(minY, xy.fY, maxY)) { + return -1; + } + SkIntersections i; + SkDLine perp = {{ xy, { xy.fX + opp.fY - xy.fY, xy.fY + xy.fX - opp.fX }}}; + (*CurveDIntersectRay[verb])(*this, perp, &i); + int minIndex = -1; + double minDist = FLT_MAX; + for (int index = 0; index < i.used(); ++index) { + double dist = xy.distance(i.pt(index)); + if (minDist > dist) { + minDist = dist; + minIndex = index; + } + } + if (minIndex < 0) { + return -1; + } + double largest = std::max(std::max(maxX, maxY), -std::min(minX, minY)); + if (!AlmostEqualUlps_Pin(largest, largest + minDist)) { // is distance within ULPS tolerance? + return -1; + } + return SkPinT(i[0][minIndex]); +} + +void SkDCurve::setConicBounds(const SkPoint curve[3], SkScalar curveWeight, + double tStart, double tEnd, SkPathOpsBounds* bounds) { + SkDConic dCurve; + dCurve.set(curve, curveWeight); + SkDRect dRect; + dRect.setBounds(dCurve, fConic, tStart, tEnd); + bounds->setLTRB(SkDoubleToScalar(dRect.fLeft), SkDoubleToScalar(dRect.fTop), + SkDoubleToScalar(dRect.fRight), SkDoubleToScalar(dRect.fBottom)); +} + +void SkDCurve::setCubicBounds(const SkPoint curve[4], SkScalar , + double tStart, double tEnd, SkPathOpsBounds* bounds) { + SkDCubic dCurve; + dCurve.set(curve); + SkDRect dRect; + dRect.setBounds(dCurve, fCubic, tStart, tEnd); + bounds->setLTRB(SkDoubleToScalar(dRect.fLeft), SkDoubleToScalar(dRect.fTop), + SkDoubleToScalar(dRect.fRight), SkDoubleToScalar(dRect.fBottom)); +} + +void SkDCurve::setQuadBounds(const SkPoint curve[3], SkScalar , + double tStart, double tEnd, SkPathOpsBounds* bounds) { + SkDQuad dCurve; + dCurve.set(curve); + SkDRect dRect; + dRect.setBounds(dCurve, fQuad, tStart, tEnd); + bounds->setLTRB(SkDoubleToScalar(dRect.fLeft), SkDoubleToScalar(dRect.fTop), + SkDoubleToScalar(dRect.fRight), SkDoubleToScalar(dRect.fBottom)); +} + +void SkDCurveSweep::setCurveHullSweep(SkPath::Verb verb) { + fOrdered = true; + fSweep[0] = fCurve[1] - fCurve[0]; + if (SkPath::kLine_Verb == verb) { + fSweep[1] = fSweep[0]; + fIsCurve = false; + return; + } + fSweep[1] = fCurve[2] - fCurve[0]; + // OPTIMIZE: I do the following float check a lot -- probably need a + // central place for this val-is-small-compared-to-curve check + double maxVal = 0; + for (int index = 0; index <= SkPathOpsVerbToPoints(verb); ++index) { + maxVal = std::max(maxVal, std::max(SkTAbs(fCurve[index].fX), + SkTAbs(fCurve[index].fY))); + } + { + if (SkPath::kCubic_Verb != verb) { + if (roughly_zero_when_compared_to(fSweep[0].fX, maxVal) + && roughly_zero_when_compared_to(fSweep[0].fY, maxVal)) { + fSweep[0] = fSweep[1]; + } + goto setIsCurve; + } + SkDVector thirdSweep = fCurve[3] - fCurve[0]; + if (fSweep[0].fX == 0 && fSweep[0].fY == 0) { + fSweep[0] = fSweep[1]; + fSweep[1] = thirdSweep; + if (roughly_zero_when_compared_to(fSweep[0].fX, maxVal) + && roughly_zero_when_compared_to(fSweep[0].fY, maxVal)) { + fSweep[0] = fSweep[1]; + fCurve[1] = fCurve[3]; + } + goto setIsCurve; + } + double s1x3 = fSweep[0].crossCheck(thirdSweep); + double s3x2 = thirdSweep.crossCheck(fSweep[1]); + if (s1x3 * s3x2 >= 0) { // if third vector is on or between first two vectors + goto setIsCurve; + } + double s2x1 = fSweep[1].crossCheck(fSweep[0]); + // FIXME: If the sweep of the cubic is greater than 180 degrees, we're in trouble + // probably such wide sweeps should be artificially subdivided earlier so that never happens + SkASSERT(s1x3 * s2x1 < 0 || s1x3 * s3x2 < 0); + if (s3x2 * s2x1 < 0) { + SkASSERT(s2x1 * s1x3 > 0); + fSweep[0] = fSweep[1]; + fOrdered = false; + } + fSweep[1] = thirdSweep; + } +setIsCurve: + fIsCurve = fSweep[0].crossCheck(fSweep[1]) != 0; +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsCurve.h b/gfx/skia/skia/src/pathops/SkPathOpsCurve.h new file mode 100644 index 0000000000..1729dc27ab --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsCurve.h @@ -0,0 +1,427 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsCurve_DEFINE +#define SkPathOpsCurve_DEFINE + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTypes.h" + +struct SkPathOpsBounds; + +struct SkOpCurve { + SkPoint fPts[4]; + SkScalar fWeight; + SkDEBUGCODE(SkPath::Verb fVerb); + + const SkPoint& operator[](int n) const { + SkASSERT(n >= 0 && n <= SkPathOpsVerbToPoints(fVerb)); + return fPts[n]; + } + + void dump() const; + + void set(const SkDQuad& quad) { + for (int index = 0; index < SkDQuad::kPointCount; ++index) { + fPts[index] = quad[index].asSkPoint(); + } + SkDEBUGCODE(fWeight = 1); + SkDEBUGCODE(fVerb = SkPath::kQuad_Verb); + } + + void set(const SkDCubic& cubic) { + for (int index = 0; index < SkDCubic::kPointCount; ++index) { + fPts[index] = cubic[index].asSkPoint(); + } + SkDEBUGCODE(fWeight = 1); + SkDEBUGCODE(fVerb = SkPath::kCubic_Verb); + } + +}; + +struct SkDCurve { + union { + SkDLine fLine; + SkDQuad fQuad; + SkDConic fConic; + SkDCubic fCubic; + }; + SkDEBUGCODE(SkPath::Verb fVerb); + + const SkDPoint& operator[](int n) const { + SkASSERT(n >= 0 && n <= SkPathOpsVerbToPoints(fVerb)); + return fCubic[n]; + } + + SkDPoint& operator[](int n) { + SkASSERT(n >= 0 && n <= SkPathOpsVerbToPoints(fVerb)); + return fCubic[n]; + } + + SkDPoint conicTop(const SkPoint curve[3], SkScalar curveWeight, + double s, double e, double* topT); + SkDPoint cubicTop(const SkPoint curve[4], SkScalar , double s, double e, double* topT); + void dump() const; + void dumpID(int ) const; + SkDPoint lineTop(const SkPoint[2], SkScalar , double , double , double* topT); + double nearPoint(SkPath::Verb verb, const SkDPoint& xy, const SkDPoint& opp) const; + SkDPoint quadTop(const SkPoint curve[3], SkScalar , double s, double e, double* topT); + + void setConicBounds(const SkPoint curve[3], SkScalar curveWeight, + double s, double e, SkPathOpsBounds* ); + void setCubicBounds(const SkPoint curve[4], SkScalar , + double s, double e, SkPathOpsBounds* ); + void setQuadBounds(const SkPoint curve[3], SkScalar , + double s, double e, SkPathOpsBounds*); +}; + +class SkDCurveSweep { +public: + bool isCurve() const { return fIsCurve; } + bool isOrdered() const { return fOrdered; } + void setCurveHullSweep(SkPath::Verb verb); + + SkDCurve fCurve; + SkDVector fSweep[2]; +private: + bool fIsCurve; + bool fOrdered; // cleared when a cubic's control point isn't between the sweep vectors + +}; + +extern SkDPoint (SkDCurve::* const Top[])(const SkPoint curve[], SkScalar cWeight, + double tStart, double tEnd, double* topT); + +static SkDPoint dline_xy_at_t(const SkPoint a[2], SkScalar , double t) { + SkDLine line; + line.set(a); + return line.ptAtT(t); +} + +static SkDPoint dquad_xy_at_t(const SkPoint a[3], SkScalar , double t) { + SkDQuad quad; + quad.set(a); + return quad.ptAtT(t); +} + +static SkDPoint dconic_xy_at_t(const SkPoint a[3], SkScalar weight, double t) { + SkDConic conic; + conic.set(a, weight); + return conic.ptAtT(t); +} + +static SkDPoint dcubic_xy_at_t(const SkPoint a[4], SkScalar , double t) { + SkDCubic cubic; + cubic.set(a); + return cubic.ptAtT(t); +} + +static SkDPoint (* const CurveDPointAtT[])(const SkPoint[], SkScalar , double ) = { + nullptr, + dline_xy_at_t, + dquad_xy_at_t, + dconic_xy_at_t, + dcubic_xy_at_t +}; + +static SkDPoint ddline_xy_at_t(const SkDCurve& c, double t) { + return c.fLine.ptAtT(t); +} + +static SkDPoint ddquad_xy_at_t(const SkDCurve& c, double t) { + return c.fQuad.ptAtT(t); +} + +static SkDPoint ddconic_xy_at_t(const SkDCurve& c, double t) { + return c.fConic.ptAtT(t); +} + +static SkDPoint ddcubic_xy_at_t(const SkDCurve& c, double t) { + return c.fCubic.ptAtT(t); +} + +static SkDPoint (* const CurveDDPointAtT[])(const SkDCurve& , double ) = { + nullptr, + ddline_xy_at_t, + ddquad_xy_at_t, + ddconic_xy_at_t, + ddcubic_xy_at_t +}; + +static SkPoint fline_xy_at_t(const SkPoint a[2], SkScalar weight, double t) { + return dline_xy_at_t(a, weight, t).asSkPoint(); +} + +static SkPoint fquad_xy_at_t(const SkPoint a[3], SkScalar weight, double t) { + return dquad_xy_at_t(a, weight, t).asSkPoint(); +} + +static SkPoint fconic_xy_at_t(const SkPoint a[3], SkScalar weight, double t) { + return dconic_xy_at_t(a, weight, t).asSkPoint(); +} + +static SkPoint fcubic_xy_at_t(const SkPoint a[4], SkScalar weight, double t) { + return dcubic_xy_at_t(a, weight, t).asSkPoint(); +} + +static SkPoint (* const CurvePointAtT[])(const SkPoint[], SkScalar , double ) = { + nullptr, + fline_xy_at_t, + fquad_xy_at_t, + fconic_xy_at_t, + fcubic_xy_at_t +}; + +static SkDVector dline_dxdy_at_t(const SkPoint a[2], SkScalar , double ) { + SkDLine line; + line.set(a); + return line[1] - line[0]; +} + +static SkDVector dquad_dxdy_at_t(const SkPoint a[3], SkScalar , double t) { + SkDQuad quad; + quad.set(a); + return quad.dxdyAtT(t); +} + +static SkDVector dconic_dxdy_at_t(const SkPoint a[3], SkScalar weight, double t) { + SkDConic conic; + conic.set(a, weight); + return conic.dxdyAtT(t); +} + +static SkDVector dcubic_dxdy_at_t(const SkPoint a[4], SkScalar , double t) { + SkDCubic cubic; + cubic.set(a); + return cubic.dxdyAtT(t); +} + +static SkDVector (* const CurveDSlopeAtT[])(const SkPoint[], SkScalar , double ) = { + nullptr, + dline_dxdy_at_t, + dquad_dxdy_at_t, + dconic_dxdy_at_t, + dcubic_dxdy_at_t +}; + +static SkDVector ddline_dxdy_at_t(const SkDCurve& c, double ) { + return c.fLine.fPts[1] - c.fLine.fPts[0]; +} + +static SkDVector ddquad_dxdy_at_t(const SkDCurve& c, double t) { + return c.fQuad.dxdyAtT(t); +} + +static SkDVector ddconic_dxdy_at_t(const SkDCurve& c, double t) { + return c.fConic.dxdyAtT(t); +} + +static SkDVector ddcubic_dxdy_at_t(const SkDCurve& c, double t) { + return c.fCubic.dxdyAtT(t); +} + +static SkDVector (* const CurveDDSlopeAtT[])(const SkDCurve& , double ) = { + nullptr, + ddline_dxdy_at_t, + ddquad_dxdy_at_t, + ddconic_dxdy_at_t, + ddcubic_dxdy_at_t +}; + +static SkVector fline_dxdy_at_t(const SkPoint a[2], SkScalar , double ) { + return a[1] - a[0]; +} + +static SkVector fquad_dxdy_at_t(const SkPoint a[3], SkScalar weight, double t) { + return dquad_dxdy_at_t(a, weight, t).asSkVector(); +} + +static SkVector fconic_dxdy_at_t(const SkPoint a[3], SkScalar weight, double t) { + return dconic_dxdy_at_t(a, weight, t).asSkVector(); +} + +static SkVector fcubic_dxdy_at_t(const SkPoint a[4], SkScalar weight, double t) { + return dcubic_dxdy_at_t(a, weight, t).asSkVector(); +} + +static SkVector (* const CurveSlopeAtT[])(const SkPoint[], SkScalar , double ) = { + nullptr, + fline_dxdy_at_t, + fquad_dxdy_at_t, + fconic_dxdy_at_t, + fcubic_dxdy_at_t +}; + +static bool line_is_vertical(const SkPoint a[2], SkScalar , double startT, double endT) { + SkDLine line; + line.set(a); + SkDPoint dst[2] = { line.ptAtT(startT), line.ptAtT(endT) }; + return AlmostEqualUlps(dst[0].fX, dst[1].fX); +} + +static bool quad_is_vertical(const SkPoint a[3], SkScalar , double startT, double endT) { + SkDQuad quad; + quad.set(a); + SkDQuad dst = quad.subDivide(startT, endT); + return AlmostEqualUlps(dst[0].fX, dst[1].fX) && AlmostEqualUlps(dst[1].fX, dst[2].fX); +} + +static bool conic_is_vertical(const SkPoint a[3], SkScalar weight, double startT, double endT) { + SkDConic conic; + conic.set(a, weight); + SkDConic dst = conic.subDivide(startT, endT); + return AlmostEqualUlps(dst[0].fX, dst[1].fX) && AlmostEqualUlps(dst[1].fX, dst[2].fX); +} + +static bool cubic_is_vertical(const SkPoint a[4], SkScalar , double startT, double endT) { + SkDCubic cubic; + cubic.set(a); + SkDCubic dst = cubic.subDivide(startT, endT); + return AlmostEqualUlps(dst[0].fX, dst[1].fX) && AlmostEqualUlps(dst[1].fX, dst[2].fX) + && AlmostEqualUlps(dst[2].fX, dst[3].fX); +} + +static bool (* const CurveIsVertical[])(const SkPoint[], SkScalar , double , double) = { + nullptr, + line_is_vertical, + quad_is_vertical, + conic_is_vertical, + cubic_is_vertical +}; + +static void line_intersect_ray(const SkPoint a[2], SkScalar , const SkDLine& ray, + SkIntersections* i) { + SkDLine line; + line.set(a); + i->intersectRay(line, ray); +} + +static void quad_intersect_ray(const SkPoint a[3], SkScalar , const SkDLine& ray, + SkIntersections* i) { + SkDQuad quad; + quad.set(a); + i->intersectRay(quad, ray); +} + +static void conic_intersect_ray(const SkPoint a[3], SkScalar weight, const SkDLine& ray, + SkIntersections* i) { + SkDConic conic; + conic.set(a, weight); + i->intersectRay(conic, ray); +} + +static void cubic_intersect_ray(const SkPoint a[4], SkScalar , const SkDLine& ray, + SkIntersections* i) { + SkDCubic cubic; + cubic.set(a); + i->intersectRay(cubic, ray); +} + +static void (* const CurveIntersectRay[])(const SkPoint[] , SkScalar , const SkDLine& , + SkIntersections* ) = { + nullptr, + line_intersect_ray, + quad_intersect_ray, + conic_intersect_ray, + cubic_intersect_ray +}; + +static void dline_intersect_ray(const SkDCurve& c, const SkDLine& ray, SkIntersections* i) { + i->intersectRay(c.fLine, ray); +} + +static void dquad_intersect_ray(const SkDCurve& c, const SkDLine& ray, SkIntersections* i) { + i->intersectRay(c.fQuad, ray); +} + +static void dconic_intersect_ray(const SkDCurve& c, const SkDLine& ray, SkIntersections* i) { + i->intersectRay(c.fConic, ray); +} + +static void dcubic_intersect_ray(const SkDCurve& c, const SkDLine& ray, SkIntersections* i) { + i->intersectRay(c.fCubic, ray); +} + +static void (* const CurveDIntersectRay[])(const SkDCurve& , const SkDLine& , SkIntersections* ) = { + nullptr, + dline_intersect_ray, + dquad_intersect_ray, + dconic_intersect_ray, + dcubic_intersect_ray +}; + +static int line_intercept_h(const SkPoint a[2], SkScalar , SkScalar y, double* roots) { + if (a[0].fY == a[1].fY) { + return false; + } + SkDLine line; + roots[0] = SkIntersections::HorizontalIntercept(line.set(a), y); + return between(0, roots[0], 1); +} + +static int line_intercept_v(const SkPoint a[2], SkScalar , SkScalar x, double* roots) { + if (a[0].fX == a[1].fX) { + return false; + } + SkDLine line; + roots[0] = SkIntersections::VerticalIntercept(line.set(a), x); + return between(0, roots[0], 1); +} + +static int quad_intercept_h(const SkPoint a[2], SkScalar , SkScalar y, double* roots) { + SkDQuad quad; + return SkIntersections::HorizontalIntercept(quad.set(a), y, roots); +} + +static int quad_intercept_v(const SkPoint a[2], SkScalar , SkScalar x, double* roots) { + SkDQuad quad; + return SkIntersections::VerticalIntercept(quad.set(a), x, roots); +} + +static int conic_intercept_h(const SkPoint a[2], SkScalar w, SkScalar y, double* roots) { + SkDConic conic; + return SkIntersections::HorizontalIntercept(conic.set(a, w), y, roots); +} + +static int conic_intercept_v(const SkPoint a[2], SkScalar w, SkScalar x, double* roots) { + SkDConic conic; + return SkIntersections::VerticalIntercept(conic.set(a, w), x, roots); +} + +static int cubic_intercept_h(const SkPoint a[3], SkScalar , SkScalar y, double* roots) { + SkDCubic cubic; + return cubic.set(a).horizontalIntersect(y, roots); +} + +static int cubic_intercept_v(const SkPoint a[3], SkScalar , SkScalar x, double* roots) { + SkDCubic cubic; + return cubic.set(a).verticalIntersect(x, roots); +} + +static int (* const CurveIntercept[])(const SkPoint[] , SkScalar , SkScalar , double* ) = { + nullptr, + nullptr, + line_intercept_h, + line_intercept_v, + quad_intercept_h, + quad_intercept_v, + conic_intercept_h, + conic_intercept_v, + cubic_intercept_h, + cubic_intercept_v, +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsDebug.cpp b/gfx/skia/skia/src/pathops/SkPathOpsDebug.cpp new file mode 100644 index 0000000000..9213df0c3f --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsDebug.cpp @@ -0,0 +1,3096 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pathops/SkPathOpsDebug.h" + +#include "include/core/SkPath.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/core/SkString.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkMutex.h" +#include "src/core/SkPathPriv.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkOpAngle.h" +#include "src/pathops/SkOpCoincidence.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsRect.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +#if DEBUG_DUMP_VERIFY +bool SkPathOpsDebug::gDumpOp; // set to true to write op to file before a crash +bool SkPathOpsDebug::gVerifyOp; // set to true to compare result against regions +#endif + +bool SkPathOpsDebug::gRunFail; // set to true to check for success on tests known to fail +bool SkPathOpsDebug::gVeryVerbose; // set to true to run extensive checking tests + +#define FAIL_IF_COIN(cond, coin) \ + do { if (cond) log->record(SkPathOpsDebug::kFail_Glitch, coin); } while (false) + +#undef FAIL_WITH_NULL_IF +#define FAIL_WITH_NULL_IF(cond, span) \ + do { if (cond) log->record(SkPathOpsDebug::kFail_Glitch, span); } while (false) + +#define RETURN_FALSE_IF(cond, span) \ + do { if (cond) log->record(SkPathOpsDebug::kReturnFalse_Glitch, span); \ + } while (false) + +#if DEBUG_SORT +int SkPathOpsDebug::gSortCountDefault = SK_MaxS32; +int SkPathOpsDebug::gSortCount; +#endif + +#if DEBUG_ACTIVE_OP +const char* SkPathOpsDebug::kPathOpStr[] = {"diff", "sect", "union", "xor", "rdiff"}; +#endif + +#if defined SK_DEBUG || !FORCE_RELEASE + +int SkPathOpsDebug::gContourID = 0; +int SkPathOpsDebug::gSegmentID = 0; + +bool SkPathOpsDebug::ChaseContains(const SkTDArray& chaseArray, + const SkOpSpanBase* span) { + for (int index = 0; index < chaseArray.size(); ++index) { + const SkOpSpanBase* entry = chaseArray[index]; + if (entry == span) { + return true; + } + } + return false; +} +#endif + +#if DEBUG_ACTIVE_SPANS +SkString SkPathOpsDebug::gActiveSpans; +#endif + +#if DEBUG_COIN +class SkCoincidentSpans; + +SkPathOpsDebug::CoinDict SkPathOpsDebug::gCoinSumChangedDict; +SkPathOpsDebug::CoinDict SkPathOpsDebug::gCoinSumVisitedDict; + +static const int kGlitchType_Count = SkPathOpsDebug::kUnalignedTail_Glitch + 1; + +struct SpanGlitch { + const SkOpSpanBase* fBase; + const SkOpSpanBase* fSuspect; + const SkOpSegment* fSegment; + const SkOpSegment* fOppSegment; + const SkOpPtT* fCoinSpan; + const SkOpPtT* fEndSpan; + const SkOpPtT* fOppSpan; + const SkOpPtT* fOppEndSpan; + double fStartT; + double fEndT; + double fOppStartT; + double fOppEndT; + SkPoint fPt; + SkPathOpsDebug::GlitchType fType; + + void dumpType() const; +}; + +struct SkPathOpsDebug::GlitchLog { + void init(const SkOpGlobalState* state) { + fGlobalState = state; + } + + SpanGlitch* recordCommon(GlitchType type) { + SpanGlitch* glitch = fGlitches.push(); + glitch->fBase = nullptr; + glitch->fSuspect = nullptr; + glitch->fSegment = nullptr; + glitch->fOppSegment = nullptr; + glitch->fCoinSpan = nullptr; + glitch->fEndSpan = nullptr; + glitch->fOppSpan = nullptr; + glitch->fOppEndSpan = nullptr; + glitch->fStartT = SK_ScalarNaN; + glitch->fEndT = SK_ScalarNaN; + glitch->fOppStartT = SK_ScalarNaN; + glitch->fOppEndT = SK_ScalarNaN; + glitch->fPt = { SK_ScalarNaN, SK_ScalarNaN }; + glitch->fType = type; + return glitch; + } + + void record(GlitchType type, const SkOpSpanBase* base, + const SkOpSpanBase* suspect = NULL) { + SpanGlitch* glitch = recordCommon(type); + glitch->fBase = base; + glitch->fSuspect = suspect; + } + + void record(GlitchType type, const SkOpSpanBase* base, + const SkOpPtT* ptT) { + SpanGlitch* glitch = recordCommon(type); + glitch->fBase = base; + glitch->fCoinSpan = ptT; + } + + void record(GlitchType type, const SkCoincidentSpans* coin, + const SkCoincidentSpans* opp = NULL) { + SpanGlitch* glitch = recordCommon(type); + glitch->fCoinSpan = coin->coinPtTStart(); + glitch->fEndSpan = coin->coinPtTEnd(); + if (opp) { + glitch->fOppSpan = opp->coinPtTStart(); + glitch->fOppEndSpan = opp->coinPtTEnd(); + } + } + + void record(GlitchType type, const SkOpSpanBase* base, + const SkOpSegment* seg, double t, SkPoint pt) { + SpanGlitch* glitch = recordCommon(type); + glitch->fBase = base; + glitch->fSegment = seg; + glitch->fStartT = t; + glitch->fPt = pt; + } + + void record(GlitchType type, const SkOpSpanBase* base, double t, + SkPoint pt) { + SpanGlitch* glitch = recordCommon(type); + glitch->fBase = base; + glitch->fStartT = t; + glitch->fPt = pt; + } + + void record(GlitchType type, const SkCoincidentSpans* coin, + const SkOpPtT* coinSpan, const SkOpPtT* endSpan) { + SpanGlitch* glitch = recordCommon(type); + glitch->fCoinSpan = coin->coinPtTStart(); + glitch->fEndSpan = coin->coinPtTEnd(); + glitch->fEndSpan = endSpan; + glitch->fOppSpan = coinSpan; + glitch->fOppEndSpan = endSpan; + } + + void record(GlitchType type, const SkCoincidentSpans* coin, + const SkOpSpanBase* base) { + SpanGlitch* glitch = recordCommon(type); + glitch->fBase = base; + glitch->fCoinSpan = coin->coinPtTStart(); + glitch->fEndSpan = coin->coinPtTEnd(); + } + + void record(GlitchType type, const SkOpPtT* ptTS, const SkOpPtT* ptTE, + const SkOpPtT* oPtTS, const SkOpPtT* oPtTE) { + SpanGlitch* glitch = recordCommon(type); + glitch->fCoinSpan = ptTS; + glitch->fEndSpan = ptTE; + glitch->fOppSpan = oPtTS; + glitch->fOppEndSpan = oPtTE; + } + + void record(GlitchType type, const SkOpSegment* seg, double startT, + double endT, const SkOpSegment* oppSeg, double oppStartT, double oppEndT) { + SpanGlitch* glitch = recordCommon(type); + glitch->fSegment = seg; + glitch->fStartT = startT; + glitch->fEndT = endT; + glitch->fOppSegment = oppSeg; + glitch->fOppStartT = oppStartT; + glitch->fOppEndT = oppEndT; + } + + void record(GlitchType type, const SkOpSegment* seg, + const SkOpSpan* span) { + SpanGlitch* glitch = recordCommon(type); + glitch->fSegment = seg; + glitch->fBase = span; + } + + void record(GlitchType type, double t, const SkOpSpanBase* span) { + SpanGlitch* glitch = recordCommon(type); + glitch->fStartT = t; + glitch->fBase = span; + } + + void record(GlitchType type, const SkOpSegment* seg) { + SpanGlitch* glitch = recordCommon(type); + glitch->fSegment = seg; + } + + void record(GlitchType type, const SkCoincidentSpans* coin, + const SkOpPtT* ptT) { + SpanGlitch* glitch = recordCommon(type); + glitch->fCoinSpan = coin->coinPtTStart(); + glitch->fEndSpan = ptT; + } + + SkTDArray fGlitches; + const SkOpGlobalState* fGlobalState; +}; + + +void SkPathOpsDebug::CoinDict::add(const SkPathOpsDebug::CoinDict& dict) { + int count = dict.fDict.count(); + for (int index = 0; index < count; ++index) { + this->add(dict.fDict[index]); + } +} + +void SkPathOpsDebug::CoinDict::add(const CoinDictEntry& key) { + int count = fDict.count(); + for (int index = 0; index < count; ++index) { + CoinDictEntry* entry = &fDict[index]; + if (entry->fIteration == key.fIteration && entry->fLineNumber == key.fLineNumber) { + SkASSERT(!strcmp(entry->fFunctionName, key.fFunctionName)); + if (entry->fGlitchType == kUninitialized_Glitch) { + entry->fGlitchType = key.fGlitchType; + } + return; + } + } + *fDict.append() = key; +} + +#endif + +#if DEBUG_COIN +static void missing_coincidence(SkPathOpsDebug::GlitchLog* glitches, const SkOpContourHead* contourList) { + const SkOpContour* contour = contourList; + // bool result = false; + do { + /* result |= */ contour->debugMissingCoincidence(glitches); + } while ((contour = contour->next())); + return; +} + +static void move_multiples(SkPathOpsDebug::GlitchLog* glitches, const SkOpContourHead* contourList) { + const SkOpContour* contour = contourList; + do { + contour->debugMoveMultiples(glitches); + } while ((contour = contour->next())); + return; +} + +static void move_nearby(SkPathOpsDebug::GlitchLog* glitches, const SkOpContourHead* contourList) { + const SkOpContour* contour = contourList; + do { + contour->debugMoveNearby(glitches); + } while ((contour = contour->next())); +} + + +#endif + +#if DEBUG_COIN +void SkOpGlobalState::debugAddToCoinChangedDict() { + +#if DEBUG_COINCIDENCE + SkPathOpsDebug::CheckHealth(fContourHead); +#endif + // see if next coincident operation makes a change; if so, record it + SkPathOpsDebug::GlitchLog glitches; + const char* funcName = fCoinDictEntry.fFunctionName; + if (!strcmp("calc_angles", funcName)) { + // + } else if (!strcmp("missing_coincidence", funcName)) { + missing_coincidence(&glitches, fContourHead); + } else if (!strcmp("move_multiples", funcName)) { + move_multiples(&glitches, fContourHead); + } else if (!strcmp("move_nearby", funcName)) { + move_nearby(&glitches, fContourHead); + } else if (!strcmp("addExpanded", funcName)) { + fCoincidence->debugAddExpanded(&glitches); + } else if (!strcmp("addMissing", funcName)) { + bool added; + fCoincidence->debugAddMissing(&glitches, &added); + } else if (!strcmp("addEndMovedSpans", funcName)) { + fCoincidence->debugAddEndMovedSpans(&glitches); + } else if (!strcmp("correctEnds", funcName)) { + fCoincidence->debugCorrectEnds(&glitches); + } else if (!strcmp("expand", funcName)) { + fCoincidence->debugExpand(&glitches); + } else if (!strcmp("findOverlaps", funcName)) { + // + } else if (!strcmp("mark", funcName)) { + fCoincidence->debugMark(&glitches); + } else if (!strcmp("apply", funcName)) { + // + } else { + SkASSERT(0); // add missing case + } + if (glitches.fGlitches.count()) { + fCoinDictEntry.fGlitchType = glitches.fGlitches[0].fType; + } + fCoinChangedDict.add(fCoinDictEntry); +} +#endif + +void SkPathOpsDebug::ShowActiveSpans(SkOpContourHead* contourList) { +#if DEBUG_ACTIVE_SPANS + SkString str; + SkOpContour* contour = contourList; + do { + contour->debugShowActiveSpans(&str); + } while ((contour = contour->next())); + if (!gActiveSpans.equals(str)) { + const char* s = str.c_str(); + const char* end; + while ((end = strchr(s, '\n'))) { + SkDebugf("%.*s", (int) (end - s + 1), s); + s = end + 1; + } + gActiveSpans.set(str); + } +#endif +} + +#if DEBUG_COINCIDENCE || DEBUG_COIN +void SkPathOpsDebug::CheckHealth(SkOpContourHead* contourList) { +#if DEBUG_COINCIDENCE + contourList->globalState()->debugSetCheckHealth(true); +#endif +#if DEBUG_COIN + GlitchLog glitches; + const SkOpContour* contour = contourList; + const SkOpCoincidence* coincidence = contour->globalState()->coincidence(); + coincidence->debugCheckValid(&glitches); // don't call validate; spans may be inconsistent + do { + contour->debugCheckHealth(&glitches); + contour->debugMissingCoincidence(&glitches); + } while ((contour = contour->next())); + bool added; + coincidence->debugAddMissing(&glitches, &added); + coincidence->debugExpand(&glitches); + coincidence->debugAddExpanded(&glitches); + coincidence->debugMark(&glitches); + unsigned mask = 0; + for (int index = 0; index < glitches.fGlitches.count(); ++index) { + const SpanGlitch& glitch = glitches.fGlitches[index]; + mask |= 1 << glitch.fType; + } + for (int index = 0; index < kGlitchType_Count; ++index) { + SkDebugf(mask & (1 << index) ? "x" : "-"); + } + SkDebugf(" %s\n", contourList->globalState()->debugCoinDictEntry().fFunctionName); + for (int index = 0; index < glitches.fGlitches.count(); ++index) { + const SpanGlitch& glitch = glitches.fGlitches[index]; + SkDebugf("%02d: ", index); + if (glitch.fBase) { + SkDebugf(" seg/base=%d/%d", glitch.fBase->segment()->debugID(), + glitch.fBase->debugID()); + } + if (glitch.fSuspect) { + SkDebugf(" seg/base=%d/%d", glitch.fSuspect->segment()->debugID(), + glitch.fSuspect->debugID()); + } + if (glitch.fSegment) { + SkDebugf(" segment=%d", glitch.fSegment->debugID()); + } + if (glitch.fCoinSpan) { + SkDebugf(" coinSeg/Span/PtT=%d/%d/%d", glitch.fCoinSpan->segment()->debugID(), + glitch.fCoinSpan->span()->debugID(), glitch.fCoinSpan->debugID()); + } + if (glitch.fEndSpan) { + SkDebugf(" endSpan=%d", glitch.fEndSpan->debugID()); + } + if (glitch.fOppSpan) { + SkDebugf(" oppSeg/Span/PtT=%d/%d/%d", glitch.fOppSpan->segment()->debugID(), + glitch.fOppSpan->span()->debugID(), glitch.fOppSpan->debugID()); + } + if (glitch.fOppEndSpan) { + SkDebugf(" oppEndSpan=%d", glitch.fOppEndSpan->debugID()); + } + if (!SkScalarIsNaN(glitch.fStartT)) { + SkDebugf(" startT=%g", glitch.fStartT); + } + if (!SkScalarIsNaN(glitch.fEndT)) { + SkDebugf(" endT=%g", glitch.fEndT); + } + if (glitch.fOppSegment) { + SkDebugf(" segment=%d", glitch.fOppSegment->debugID()); + } + if (!SkScalarIsNaN(glitch.fOppStartT)) { + SkDebugf(" oppStartT=%g", glitch.fOppStartT); + } + if (!SkScalarIsNaN(glitch.fOppEndT)) { + SkDebugf(" oppEndT=%g", glitch.fOppEndT); + } + if (!SkScalarIsNaN(glitch.fPt.fX) || !SkScalarIsNaN(glitch.fPt.fY)) { + SkDebugf(" pt=%g,%g", glitch.fPt.fX, glitch.fPt.fY); + } + DumpGlitchType(glitch.fType); + SkDebugf("\n"); + } +#if DEBUG_COINCIDENCE + contourList->globalState()->debugSetCheckHealth(false); +#endif +#if 01 && DEBUG_ACTIVE_SPANS +// SkDebugf("active after %s:\n", id); + ShowActiveSpans(contourList); +#endif +#endif +} +#endif + +#if DEBUG_COIN +void SkPathOpsDebug::DumpGlitchType(GlitchType glitchType) { + switch (glitchType) { + case kAddCorruptCoin_Glitch: SkDebugf(" AddCorruptCoin"); break; + case kAddExpandedCoin_Glitch: SkDebugf(" AddExpandedCoin"); break; + case kAddExpandedFail_Glitch: SkDebugf(" AddExpandedFail"); break; + case kAddIfCollapsed_Glitch: SkDebugf(" AddIfCollapsed"); break; + case kAddIfMissingCoin_Glitch: SkDebugf(" AddIfMissingCoin"); break; + case kAddMissingCoin_Glitch: SkDebugf(" AddMissingCoin"); break; + case kAddMissingExtend_Glitch: SkDebugf(" AddMissingExtend"); break; + case kAddOrOverlap_Glitch: SkDebugf(" AAddOrOverlap"); break; + case kCollapsedCoin_Glitch: SkDebugf(" CollapsedCoin"); break; + case kCollapsedDone_Glitch: SkDebugf(" CollapsedDone"); break; + case kCollapsedOppValue_Glitch: SkDebugf(" CollapsedOppValue"); break; + case kCollapsedSpan_Glitch: SkDebugf(" CollapsedSpan"); break; + case kCollapsedWindValue_Glitch: SkDebugf(" CollapsedWindValue"); break; + case kCorrectEnd_Glitch: SkDebugf(" CorrectEnd"); break; + case kDeletedCoin_Glitch: SkDebugf(" DeletedCoin"); break; + case kExpandCoin_Glitch: SkDebugf(" ExpandCoin"); break; + case kFail_Glitch: SkDebugf(" Fail"); break; + case kMarkCoinEnd_Glitch: SkDebugf(" MarkCoinEnd"); break; + case kMarkCoinInsert_Glitch: SkDebugf(" MarkCoinInsert"); break; + case kMarkCoinMissing_Glitch: SkDebugf(" MarkCoinMissing"); break; + case kMarkCoinStart_Glitch: SkDebugf(" MarkCoinStart"); break; + case kMergeMatches_Glitch: SkDebugf(" MergeMatches"); break; + case kMissingCoin_Glitch: SkDebugf(" MissingCoin"); break; + case kMissingDone_Glitch: SkDebugf(" MissingDone"); break; + case kMissingIntersection_Glitch: SkDebugf(" MissingIntersection"); break; + case kMoveMultiple_Glitch: SkDebugf(" MoveMultiple"); break; + case kMoveNearbyClearAll_Glitch: SkDebugf(" MoveNearbyClearAll"); break; + case kMoveNearbyClearAll2_Glitch: SkDebugf(" MoveNearbyClearAll2"); break; + case kMoveNearbyMerge_Glitch: SkDebugf(" MoveNearbyMerge"); break; + case kMoveNearbyMergeFinal_Glitch: SkDebugf(" MoveNearbyMergeFinal"); break; + case kMoveNearbyRelease_Glitch: SkDebugf(" MoveNearbyRelease"); break; + case kMoveNearbyReleaseFinal_Glitch: SkDebugf(" MoveNearbyReleaseFinal"); break; + case kReleasedSpan_Glitch: SkDebugf(" ReleasedSpan"); break; + case kReturnFalse_Glitch: SkDebugf(" ReturnFalse"); break; + case kUnaligned_Glitch: SkDebugf(" Unaligned"); break; + case kUnalignedHead_Glitch: SkDebugf(" UnalignedHead"); break; + case kUnalignedTail_Glitch: SkDebugf(" UnalignedTail"); break; + case kUninitialized_Glitch: break; + default: SkASSERT(0); + } +} +#endif + +#if defined SK_DEBUG || !FORCE_RELEASE +void SkPathOpsDebug::MathematicaIze(char* str, size_t bufferLen) { + size_t len = strlen(str); + bool num = false; + for (size_t idx = 0; idx < len; ++idx) { + if (num && str[idx] == 'e') { + if (len + 2 >= bufferLen) { + return; + } + memmove(&str[idx + 2], &str[idx + 1], len - idx); + str[idx] = '*'; + str[idx + 1] = '^'; + ++len; + } + num = str[idx] >= '0' && str[idx] <= '9'; + } +} + +bool SkPathOpsDebug::ValidWind(int wind) { + return wind > SK_MinS32 + 0xFFFF && wind < SK_MaxS32 - 0xFFFF; +} + +void SkPathOpsDebug::WindingPrintf(int wind) { + if (wind == SK_MinS32) { + SkDebugf("?"); + } else { + SkDebugf("%d", wind); + } +} +#endif // defined SK_DEBUG || !FORCE_RELEASE + + +static void show_function_header(const char* functionName) { + SkDebugf("\nstatic void %s(skiatest::Reporter* reporter, const char* filename) {\n", functionName); + if (strcmp("skphealth_com76", functionName) == 0) { + SkDebugf("found it\n"); + } +} + +static const char* gOpStrs[] = { + "kDifference_SkPathOp", + "kIntersect_SkPathOp", + "kUnion_SkPathOp", + "kXOR_PathOp", + "kReverseDifference_SkPathOp", +}; + +const char* SkPathOpsDebug::OpStr(SkPathOp op) { + return gOpStrs[op]; +} + +static void show_op(SkPathOp op, const char* pathOne, const char* pathTwo) { + SkDebugf(" testPathOp(reporter, %s, %s, %s, filename);\n", pathOne, pathTwo, gOpStrs[op]); + SkDebugf("}\n"); +} + +void SkPathOpsDebug::ShowPath(const SkPath& a, const SkPath& b, SkPathOp shapeOp, + const char* testName) { + static SkMutex& mutex = *(new SkMutex); + + SkAutoMutexExclusive ac(mutex); + show_function_header(testName); + ShowOnePath(a, "path", true); + ShowOnePath(b, "pathB", true); + show_op(shapeOp, "path", "pathB"); +} + +#if DEBUG_COIN + +void SkOpGlobalState::debugAddToGlobalCoinDicts() { + static SkMutex& mutex = *(new SkMutex); + SkAutoMutexExclusive ac(mutex); + SkPathOpsDebug::gCoinSumChangedDict.add(fCoinChangedDict); + SkPathOpsDebug::gCoinSumVisitedDict.add(fCoinVisitedDict); +} + +#endif + +#if DEBUG_T_SECT_LOOP_COUNT +void SkOpGlobalState::debugAddLoopCount(SkIntersections* i, const SkIntersectionHelper& wt, + const SkIntersectionHelper& wn) { + for (int index = 0; index < (int) std::size(fDebugLoopCount); ++index) { + SkIntersections::DebugLoop looper = (SkIntersections::DebugLoop) index; + if (fDebugLoopCount[index] >= i->debugLoopCount(looper)) { + continue; + } + fDebugLoopCount[index] = i->debugLoopCount(looper); + fDebugWorstVerb[index * 2] = wt.segment()->verb(); + fDebugWorstVerb[index * 2 + 1] = wn.segment()->verb(); + sk_bzero(&fDebugWorstPts[index * 8], sizeof(SkPoint) * 8); + memcpy(&fDebugWorstPts[index * 2 * 4], wt.pts(), + (SkPathOpsVerbToPoints(wt.segment()->verb()) + 1) * sizeof(SkPoint)); + memcpy(&fDebugWorstPts[(index * 2 + 1) * 4], wn.pts(), + (SkPathOpsVerbToPoints(wn.segment()->verb()) + 1) * sizeof(SkPoint)); + fDebugWorstWeight[index * 2] = wt.weight(); + fDebugWorstWeight[index * 2 + 1] = wn.weight(); + } + i->debugResetLoopCount(); +} + +void SkOpGlobalState::debugDoYourWorst(SkOpGlobalState* local) { + for (int index = 0; index < (int) std::size(fDebugLoopCount); ++index) { + if (fDebugLoopCount[index] >= local->fDebugLoopCount[index]) { + continue; + } + fDebugLoopCount[index] = local->fDebugLoopCount[index]; + fDebugWorstVerb[index * 2] = local->fDebugWorstVerb[index * 2]; + fDebugWorstVerb[index * 2 + 1] = local->fDebugWorstVerb[index * 2 + 1]; + memcpy(&fDebugWorstPts[index * 2 * 4], &local->fDebugWorstPts[index * 2 * 4], + sizeof(SkPoint) * 8); + fDebugWorstWeight[index * 2] = local->fDebugWorstWeight[index * 2]; + fDebugWorstWeight[index * 2 + 1] = local->fDebugWorstWeight[index * 2 + 1]; + } + local->debugResetLoopCounts(); +} + +static void dump_curve(SkPath::Verb verb, const SkPoint& pts, float weight) { + if (!verb) { + return; + } + const char* verbs[] = { "", "line", "quad", "conic", "cubic" }; + SkDebugf("%s: {{", verbs[verb]); + int ptCount = SkPathOpsVerbToPoints(verb); + for (int index = 0; index <= ptCount; ++index) { + SkDPoint::Dump((&pts)[index]); + if (index < ptCount - 1) { + SkDebugf(", "); + } + } + SkDebugf("}"); + if (weight != 1) { + SkDebugf(", "); + if (weight == floorf(weight)) { + SkDebugf("%.0f", weight); + } else { + SkDebugf("%1.9gf", weight); + } + } + SkDebugf("}\n"); +} + +void SkOpGlobalState::debugLoopReport() { + const char* loops[] = { "iterations", "coinChecks", "perpCalcs" }; + SkDebugf("\n"); + for (int index = 0; index < (int) std::size(fDebugLoopCount); ++index) { + SkDebugf("%s: %d\n", loops[index], fDebugLoopCount[index]); + dump_curve(fDebugWorstVerb[index * 2], fDebugWorstPts[index * 2 * 4], + fDebugWorstWeight[index * 2]); + dump_curve(fDebugWorstVerb[index * 2 + 1], fDebugWorstPts[(index * 2 + 1) * 4], + fDebugWorstWeight[index * 2 + 1]); + } +} + +void SkOpGlobalState::debugResetLoopCounts() { + sk_bzero(fDebugLoopCount, sizeof(fDebugLoopCount)); + sk_bzero(fDebugWorstVerb, sizeof(fDebugWorstVerb)); + sk_bzero(fDebugWorstPts, sizeof(fDebugWorstPts)); + sk_bzero(fDebugWorstWeight, sizeof(fDebugWorstWeight)); +} +#endif + +bool SkOpGlobalState::DebugRunFail() { + return SkPathOpsDebug::gRunFail; +} + +// this is const so it can be called by const methods that overwise don't alter state +#if DEBUG_VALIDATE || DEBUG_COIN +void SkOpGlobalState::debugSetPhase(const char* funcName DEBUG_COIN_DECLARE_PARAMS()) const { + auto writable = const_cast(this); +#if DEBUG_VALIDATE + writable->setPhase(phase); +#endif +#if DEBUG_COIN + SkPathOpsDebug::CoinDictEntry* entry = &writable->fCoinDictEntry; + writable->fPreviousFuncName = entry->fFunctionName; + entry->fIteration = iteration; + entry->fLineNumber = lineNo; + entry->fGlitchType = SkPathOpsDebug::kUninitialized_Glitch; + entry->fFunctionName = funcName; + writable->fCoinVisitedDict.add(*entry); + writable->debugAddToCoinChangedDict(); +#endif +} +#endif + +#if DEBUG_T_SECT_LOOP_COUNT +void SkIntersections::debugBumpLoopCount(DebugLoop index) { + fDebugLoopCount[index]++; +} + +int SkIntersections::debugLoopCount(DebugLoop index) const { + return fDebugLoopCount[index]; +} + +void SkIntersections::debugResetLoopCount() { + sk_bzero(fDebugLoopCount, sizeof(fDebugLoopCount)); +} +#endif + +SkDCubic SkDQuad::debugToCubic() const { + SkDCubic cubic; + cubic[0] = fPts[0]; + cubic[2] = fPts[1]; + cubic[3] = fPts[2]; + cubic[1].fX = (cubic[0].fX + cubic[2].fX * 2) / 3; + cubic[1].fY = (cubic[0].fY + cubic[2].fY * 2) / 3; + cubic[2].fX = (cubic[3].fX + cubic[2].fX * 2) / 3; + cubic[2].fY = (cubic[3].fY + cubic[2].fY * 2) / 3; + return cubic; +} + +void SkDQuad::debugSet(const SkDPoint* pts) { + memcpy(fPts, pts, sizeof(fPts)); + SkDEBUGCODE(fDebugGlobalState = nullptr); +} + +void SkDCubic::debugSet(const SkDPoint* pts) { + memcpy(fPts, pts, sizeof(fPts)); + SkDEBUGCODE(fDebugGlobalState = nullptr); +} + +void SkDConic::debugSet(const SkDPoint* pts, SkScalar weight) { + fPts.debugSet(pts); + fWeight = weight; +} + +void SkDRect::debugInit() { + fLeft = fTop = fRight = fBottom = SK_ScalarNaN; +} + +#if DEBUG_COIN +// commented-out lines keep this in sync with addT() + const SkOpPtT* SkOpSegment::debugAddT(double t, SkPathOpsDebug::GlitchLog* log) const { + debugValidate(); + SkPoint pt = this->ptAtT(t); + const SkOpSpanBase* span = &fHead; + do { + const SkOpPtT* result = span->ptT(); + if (t == result->fT || this->match(result, this, t, pt)) { +// span->bumpSpanAdds(); + return result; + } + if (t < result->fT) { + const SkOpSpan* prev = result->span()->prev(); + FAIL_WITH_NULL_IF(!prev, span); + // marks in global state that new op span has been allocated + this->globalState()->setAllocatedOpSpan(); +// span->init(this, prev, t, pt); + this->debugValidate(); +// #if DEBUG_ADD_T +// SkDebugf("%s insert t=%1.9g segID=%d spanID=%d\n", __FUNCTION__, t, +// span->segment()->debugID(), span->debugID()); +// #endif +// span->bumpSpanAdds(); + return nullptr; + } + FAIL_WITH_NULL_IF(span != &fTail, span); + } while ((span = span->upCast()->next())); + SkASSERT(0); + return nullptr; // we never get here, but need this to satisfy compiler +} +#endif + +#if DEBUG_ANGLE +void SkOpSegment::debugCheckAngleCoin() const { + const SkOpSpanBase* base = &fHead; + const SkOpSpan* span; + do { + const SkOpAngle* angle = base->fromAngle(); + if (angle && angle->debugCheckCoincidence()) { + angle->debugCheckNearCoincidence(); + } + if (base->final()) { + break; + } + span = base->upCast(); + angle = span->toAngle(); + if (angle && angle->debugCheckCoincidence()) { + angle->debugCheckNearCoincidence(); + } + } while ((base = span->next())); +} +#endif + +#if DEBUG_COIN +// this mimics the order of the checks in handle coincidence +void SkOpSegment::debugCheckHealth(SkPathOpsDebug::GlitchLog* glitches) const { + debugMoveMultiples(glitches); + debugMoveNearby(glitches); + debugMissingCoincidence(glitches); +} + +// commented-out lines keep this in sync with clearAll() +void SkOpSegment::debugClearAll(SkPathOpsDebug::GlitchLog* glitches) const { + const SkOpSpan* span = &fHead; + do { + this->debugClearOne(span, glitches); + } while ((span = span->next()->upCastable())); + this->globalState()->coincidence()->debugRelease(glitches, this); +} + +// commented-out lines keep this in sync with clearOne() +void SkOpSegment::debugClearOne(const SkOpSpan* span, SkPathOpsDebug::GlitchLog* glitches) const { + if (span->windValue()) glitches->record(SkPathOpsDebug::kCollapsedWindValue_Glitch, span); + if (span->oppValue()) glitches->record(SkPathOpsDebug::kCollapsedOppValue_Glitch, span); + if (!span->done()) glitches->record(SkPathOpsDebug::kCollapsedDone_Glitch, span); +} +#endif + +SkOpAngle* SkOpSegment::debugLastAngle() { + SkOpAngle* result = nullptr; + SkOpSpan* span = this->head(); + do { + if (span->toAngle()) { + SkASSERT(!result); + result = span->toAngle(); + } + } while ((span = span->next()->upCastable())); + SkASSERT(result); + return result; +} + +#if DEBUG_COIN +// commented-out lines keep this in sync with ClearVisited +void SkOpSegment::DebugClearVisited(const SkOpSpanBase* span) { + // reset visited flag back to false + do { + const SkOpPtT* ptT = span->ptT(), * stopPtT = ptT; + while ((ptT = ptT->next()) != stopPtT) { + const SkOpSegment* opp = ptT->segment(); + opp->resetDebugVisited(); + } + } while (!span->final() && (span = span->upCast()->next())); +} +#endif + +#if DEBUG_COIN +// commented-out lines keep this in sync with missingCoincidence() +// look for pairs of undetected coincident curves +// assumes that segments going in have visited flag clear +// Even though pairs of curves correct detect coincident runs, a run may be missed +// if the coincidence is a product of multiple intersections. For instance, given +// curves A, B, and C: +// A-B intersect at a point 1; A-C and B-C intersect at point 2, so near +// the end of C that the intersection is replaced with the end of C. +// Even though A-B correctly do not detect an intersection at point 2, +// the resulting run from point 1 to point 2 is coincident on A and B. +void SkOpSegment::debugMissingCoincidence(SkPathOpsDebug::GlitchLog* log) const { + if (this->done()) { + return; + } + const SkOpSpan* prior = nullptr; + const SkOpSpanBase* spanBase = &fHead; +// bool result = false; + do { + const SkOpPtT* ptT = spanBase->ptT(), * spanStopPtT = ptT; + SkASSERT(ptT->span() == spanBase); + while ((ptT = ptT->next()) != spanStopPtT) { + if (ptT->deleted()) { + continue; + } + const SkOpSegment* opp = ptT->span()->segment(); + if (opp->done()) { + continue; + } + // when opp is encounted the 1st time, continue; on 2nd encounter, look for coincidence + if (!opp->debugVisited()) { + continue; + } + if (spanBase == &fHead) { + continue; + } + if (ptT->segment() == this) { + continue; + } + const SkOpSpan* span = spanBase->upCastable(); + // FIXME?: this assumes that if the opposite segment is coincident then no more + // coincidence needs to be detected. This may not be true. + if (span && span->segment() != opp && span->containsCoincidence(opp)) { // debug has additional condition since it may be called before inner duplicate points have been deleted + continue; + } + if (spanBase->segment() != opp && spanBase->containsCoinEnd(opp)) { // debug has additional condition since it may be called before inner duplicate points have been deleted + continue; + } + const SkOpPtT* priorPtT = nullptr, * priorStopPtT; + // find prior span containing opp segment + const SkOpSegment* priorOpp = nullptr; + const SkOpSpan* priorTest = spanBase->prev(); + while (!priorOpp && priorTest) { + priorStopPtT = priorPtT = priorTest->ptT(); + while ((priorPtT = priorPtT->next()) != priorStopPtT) { + if (priorPtT->deleted()) { + continue; + } + const SkOpSegment* segment = priorPtT->span()->segment(); + if (segment == opp) { + prior = priorTest; + priorOpp = opp; + break; + } + } + priorTest = priorTest->prev(); + } + if (!priorOpp) { + continue; + } + if (priorPtT == ptT) { + continue; + } + const SkOpPtT* oppStart = prior->ptT(); + const SkOpPtT* oppEnd = spanBase->ptT(); + bool swapped = priorPtT->fT > ptT->fT; + if (swapped) { + using std::swap; + swap(priorPtT, ptT); + swap(oppStart, oppEnd); + } + const SkOpCoincidence* coincidence = this->globalState()->coincidence(); + const SkOpPtT* rootPriorPtT = priorPtT->span()->ptT(); + const SkOpPtT* rootPtT = ptT->span()->ptT(); + const SkOpPtT* rootOppStart = oppStart->span()->ptT(); + const SkOpPtT* rootOppEnd = oppEnd->span()->ptT(); + if (coincidence->contains(rootPriorPtT, rootPtT, rootOppStart, rootOppEnd)) { + goto swapBack; + } + if (testForCoincidence(rootPriorPtT, rootPtT, prior, spanBase, opp)) { + // mark coincidence +#if DEBUG_COINCIDENCE_VERBOSE +// SkDebugf("%s coinSpan=%d endSpan=%d oppSpan=%d oppEndSpan=%d\n", __FUNCTION__, +// rootPriorPtT->debugID(), rootPtT->debugID(), rootOppStart->debugID(), +// rootOppEnd->debugID()); +#endif + log->record(SkPathOpsDebug::kMissingCoin_Glitch, priorPtT, ptT, oppStart, oppEnd); + // coincidences->add(rootPriorPtT, rootPtT, rootOppStart, rootOppEnd); + // } +#if DEBUG_COINCIDENCE +// SkASSERT(coincidences->contains(rootPriorPtT, rootPtT, rootOppStart, rootOppEnd); +#endif + // result = true; + } + swapBack: + if (swapped) { + using std::swap; + swap(priorPtT, ptT); + } + } + } while ((spanBase = spanBase->final() ? nullptr : spanBase->upCast()->next())); + DebugClearVisited(&fHead); + return; +} + +// commented-out lines keep this in sync with moveMultiples() +// if a span has more than one intersection, merge the other segments' span as needed +void SkOpSegment::debugMoveMultiples(SkPathOpsDebug::GlitchLog* glitches) const { + debugValidate(); + const SkOpSpanBase* test = &fHead; + do { + int addCount = test->spanAddsCount(); +// SkASSERT(addCount >= 1); + if (addCount <= 1) { + continue; + } + const SkOpPtT* startPtT = test->ptT(); + const SkOpPtT* testPtT = startPtT; + do { // iterate through all spans associated with start + const SkOpSpanBase* oppSpan = testPtT->span(); + if (oppSpan->spanAddsCount() == addCount) { + continue; + } + if (oppSpan->deleted()) { + continue; + } + const SkOpSegment* oppSegment = oppSpan->segment(); + if (oppSegment == this) { + continue; + } + // find range of spans to consider merging + const SkOpSpanBase* oppPrev = oppSpan; + const SkOpSpanBase* oppFirst = oppSpan; + while ((oppPrev = oppPrev->prev())) { + if (!roughly_equal(oppPrev->t(), oppSpan->t())) { + break; + } + if (oppPrev->spanAddsCount() == addCount) { + continue; + } + if (oppPrev->deleted()) { + continue; + } + oppFirst = oppPrev; + } + const SkOpSpanBase* oppNext = oppSpan; + const SkOpSpanBase* oppLast = oppSpan; + while ((oppNext = oppNext->final() ? nullptr : oppNext->upCast()->next())) { + if (!roughly_equal(oppNext->t(), oppSpan->t())) { + break; + } + if (oppNext->spanAddsCount() == addCount) { + continue; + } + if (oppNext->deleted()) { + continue; + } + oppLast = oppNext; + } + if (oppFirst == oppLast) { + continue; + } + const SkOpSpanBase* oppTest = oppFirst; + do { + if (oppTest == oppSpan) { + continue; + } + // check to see if the candidate meets specific criteria: + // it contains spans of segments in test's loop but not including 'this' + const SkOpPtT* oppStartPtT = oppTest->ptT(); + const SkOpPtT* oppPtT = oppStartPtT; + while ((oppPtT = oppPtT->next()) != oppStartPtT) { + const SkOpSegment* oppPtTSegment = oppPtT->segment(); + if (oppPtTSegment == this) { + goto tryNextSpan; + } + const SkOpPtT* matchPtT = startPtT; + do { + if (matchPtT->segment() == oppPtTSegment) { + goto foundMatch; + } + } while ((matchPtT = matchPtT->next()) != startPtT); + goto tryNextSpan; + foundMatch: // merge oppTest and oppSpan + oppSegment->debugValidate(); + oppTest->debugMergeMatches(glitches, oppSpan); + oppTest->debugAddOpp(glitches, oppSpan); + oppSegment->debugValidate(); + goto checkNextSpan; + } + tryNextSpan: + ; + } while (oppTest != oppLast && (oppTest = oppTest->upCast()->next())); + } while ((testPtT = testPtT->next()) != startPtT); +checkNextSpan: + ; + } while ((test = test->final() ? nullptr : test->upCast()->next())); + debugValidate(); + return; +} + +// commented-out lines keep this in sync with moveNearby() +// Move nearby t values and pts so they all hang off the same span. Alignment happens later. +void SkOpSegment::debugMoveNearby(SkPathOpsDebug::GlitchLog* glitches) const { + debugValidate(); + // release undeleted spans pointing to this seg that are linked to the primary span + const SkOpSpanBase* spanBase = &fHead; + do { + const SkOpPtT* ptT = spanBase->ptT(); + const SkOpPtT* headPtT = ptT; + while ((ptT = ptT->next()) != headPtT) { + const SkOpSpanBase* test = ptT->span(); + if (ptT->segment() == this && !ptT->deleted() && test != spanBase + && test->ptT() == ptT) { + if (test->final()) { + if (spanBase == &fHead) { + glitches->record(SkPathOpsDebug::kMoveNearbyClearAll_Glitch, this); +// return; + } + glitches->record(SkPathOpsDebug::kMoveNearbyReleaseFinal_Glitch, spanBase, ptT); + } else if (test->prev()) { + glitches->record(SkPathOpsDebug::kMoveNearbyRelease_Glitch, test, headPtT); + } +// break; + } + } + spanBase = spanBase->upCast()->next(); + } while (!spanBase->final()); + + // This loop looks for adjacent spans which are near by + spanBase = &fHead; + do { // iterate through all spans associated with start + const SkOpSpanBase* test = spanBase->upCast()->next(); + bool found; + if (!this->spansNearby(spanBase, test, &found)) { + glitches->record(SkPathOpsDebug::kMoveNearbyMergeFinal_Glitch, test); + } + if (found) { + if (test->final()) { + if (spanBase->prev()) { + glitches->record(SkPathOpsDebug::kMoveNearbyMergeFinal_Glitch, test); + } else { + glitches->record(SkPathOpsDebug::kMoveNearbyClearAll2_Glitch, this); + // return + } + } else { + glitches->record(SkPathOpsDebug::kMoveNearbyMerge_Glitch, spanBase); + } + } + spanBase = test; + } while (!spanBase->final()); + debugValidate(); +} +#endif + +void SkOpSegment::debugReset() { + this->init(this->fPts, this->fWeight, this->contour(), this->verb()); +} + +#if DEBUG_COINCIDENCE_ORDER +void SkOpSegment::debugSetCoinT(int index, SkScalar t) const { + if (fDebugBaseMax < 0 || fDebugBaseIndex == index) { + fDebugBaseIndex = index; + fDebugBaseMin = std::min(t, fDebugBaseMin); + fDebugBaseMax = std::max(t, fDebugBaseMax); + return; + } + SkASSERT(fDebugBaseMin >= t || t >= fDebugBaseMax); + if (fDebugLastMax < 0 || fDebugLastIndex == index) { + fDebugLastIndex = index; + fDebugLastMin = std::min(t, fDebugLastMin); + fDebugLastMax = std::max(t, fDebugLastMax); + return; + } + SkASSERT(fDebugLastMin >= t || t >= fDebugLastMax); + SkASSERT((t - fDebugBaseMin > 0) == (fDebugLastMin - fDebugBaseMin > 0)); +} +#endif + +#if DEBUG_ACTIVE_SPANS +void SkOpSegment::debugShowActiveSpans(SkString* str) const { + debugValidate(); + if (done()) { + return; + } + int lastId = -1; + double lastT = -1; + const SkOpSpan* span = &fHead; + do { + if (span->done()) { + continue; + } + if (lastId == this->debugID() && lastT == span->t()) { + continue; + } + lastId = this->debugID(); + lastT = span->t(); + str->appendf("%s id=%d", __FUNCTION__, this->debugID()); + // since endpoints may have be adjusted, show actual computed curves + SkDCurve curvePart; + this->subDivide(span, span->next(), &curvePart); + const SkDPoint* pts = curvePart.fCubic.fPts; + str->appendf(" (%1.9g,%1.9g", pts[0].fX, pts[0].fY); + for (int vIndex = 1; vIndex <= SkPathOpsVerbToPoints(fVerb); ++vIndex) { + str->appendf(" %1.9g,%1.9g", pts[vIndex].fX, pts[vIndex].fY); + } + if (SkPath::kConic_Verb == fVerb) { + str->appendf(" %1.9gf", curvePart.fConic.fWeight); + } + str->appendf(") t=%1.9g tEnd=%1.9g", span->t(), span->next()->t()); + if (span->windSum() == SK_MinS32) { + str->appendf(" windSum=?"); + } else { + str->appendf(" windSum=%d", span->windSum()); + } + if (span->oppValue() && span->oppSum() == SK_MinS32) { + str->appendf(" oppSum=?"); + } else if (span->oppValue() || span->oppSum() != SK_MinS32) { + str->appendf(" oppSum=%d", span->oppSum()); + } + str->appendf(" windValue=%d", span->windValue()); + if (span->oppValue() || span->oppSum() != SK_MinS32) { + str->appendf(" oppValue=%d", span->oppValue()); + } + str->appendf("\n"); + } while ((span = span->next()->upCastable())); +} +#endif + +#if DEBUG_MARK_DONE +void SkOpSegment::debugShowNewWinding(const char* fun, const SkOpSpan* span, int winding) { + const SkPoint& pt = span->ptT()->fPt; + SkDebugf("%s id=%d", fun, this->debugID()); + SkDebugf(" (%1.9g,%1.9g", fPts[0].fX, fPts[0].fY); + for (int vIndex = 1; vIndex <= SkPathOpsVerbToPoints(fVerb); ++vIndex) { + SkDebugf(" %1.9g,%1.9g", fPts[vIndex].fX, fPts[vIndex].fY); + } + SkDebugf(") t=%1.9g [%d] (%1.9g,%1.9g) tEnd=%1.9g newWindSum=", + span->t(), span->debugID(), pt.fX, pt.fY, span->next()->t()); + if (winding == SK_MinS32) { + SkDebugf("?"); + } else { + SkDebugf("%d", winding); + } + SkDebugf(" windSum="); + if (span->windSum() == SK_MinS32) { + SkDebugf("?"); + } else { + SkDebugf("%d", span->windSum()); + } + SkDebugf(" windValue=%d\n", span->windValue()); +} + +void SkOpSegment::debugShowNewWinding(const char* fun, const SkOpSpan* span, int winding, + int oppWinding) { + const SkPoint& pt = span->ptT()->fPt; + SkDebugf("%s id=%d", fun, this->debugID()); + SkDebugf(" (%1.9g,%1.9g", fPts[0].fX, fPts[0].fY); + for (int vIndex = 1; vIndex <= SkPathOpsVerbToPoints(fVerb); ++vIndex) { + SkDebugf(" %1.9g,%1.9g", fPts[vIndex].fX, fPts[vIndex].fY); + } + SkDebugf(") t=%1.9g [%d] (%1.9g,%1.9g) tEnd=%1.9g newWindSum=", + span->t(), span->debugID(), pt.fX, pt.fY, span->next()->t()); + if (winding == SK_MinS32) { + SkDebugf("?"); + } else { + SkDebugf("%d", winding); + } + SkDebugf(" newOppSum="); + if (oppWinding == SK_MinS32) { + SkDebugf("?"); + } else { + SkDebugf("%d", oppWinding); + } + SkDebugf(" oppSum="); + if (span->oppSum() == SK_MinS32) { + SkDebugf("?"); + } else { + SkDebugf("%d", span->oppSum()); + } + SkDebugf(" windSum="); + if (span->windSum() == SK_MinS32) { + SkDebugf("?"); + } else { + SkDebugf("%d", span->windSum()); + } + SkDebugf(" windValue=%d oppValue=%d\n", span->windValue(), span->oppValue()); +} + +#endif + +// loop looking for a pair of angle parts that are too close to be sorted +/* This is called after other more simple intersection and angle sorting tests have been exhausted. + This should be rarely called -- the test below is thorough and time consuming. + This checks the distance between start points; the distance between +*/ +#if DEBUG_ANGLE +void SkOpAngle::debugCheckNearCoincidence() const { + const SkOpAngle* test = this; + do { + const SkOpSegment* testSegment = test->segment(); + double testStartT = test->start()->t(); + SkDPoint testStartPt = testSegment->dPtAtT(testStartT); + double testEndT = test->end()->t(); + SkDPoint testEndPt = testSegment->dPtAtT(testEndT); + double testLenSq = testStartPt.distanceSquared(testEndPt); + SkDebugf("%s testLenSq=%1.9g id=%d\n", __FUNCTION__, testLenSq, testSegment->debugID()); + double testMidT = (testStartT + testEndT) / 2; + const SkOpAngle* next = test; + while ((next = next->fNext) != this) { + SkOpSegment* nextSegment = next->segment(); + double testMidDistSq = testSegment->distSq(testMidT, next); + double testEndDistSq = testSegment->distSq(testEndT, next); + double nextStartT = next->start()->t(); + SkDPoint nextStartPt = nextSegment->dPtAtT(nextStartT); + double distSq = testStartPt.distanceSquared(nextStartPt); + double nextEndT = next->end()->t(); + double nextMidT = (nextStartT + nextEndT) / 2; + double nextMidDistSq = nextSegment->distSq(nextMidT, test); + double nextEndDistSq = nextSegment->distSq(nextEndT, test); + SkDebugf("%s distSq=%1.9g testId=%d nextId=%d\n", __FUNCTION__, distSq, + testSegment->debugID(), nextSegment->debugID()); + SkDebugf("%s testMidDistSq=%1.9g\n", __FUNCTION__, testMidDistSq); + SkDebugf("%s testEndDistSq=%1.9g\n", __FUNCTION__, testEndDistSq); + SkDebugf("%s nextMidDistSq=%1.9g\n", __FUNCTION__, nextMidDistSq); + SkDebugf("%s nextEndDistSq=%1.9g\n", __FUNCTION__, nextEndDistSq); + SkDPoint nextEndPt = nextSegment->dPtAtT(nextEndT); + double nextLenSq = nextStartPt.distanceSquared(nextEndPt); + SkDebugf("%s nextLenSq=%1.9g\n", __FUNCTION__, nextLenSq); + SkDebugf("\n"); + } + test = test->fNext; + } while (test->fNext != this); +} +#endif + +#if DEBUG_ANGLE +SkString SkOpAngle::debugPart() const { + SkString result; + switch (this->segment()->verb()) { + case SkPath::kLine_Verb: + result.printf(LINE_DEBUG_STR " id=%d", LINE_DEBUG_DATA(fPart.fCurve), + this->segment()->debugID()); + break; + case SkPath::kQuad_Verb: + result.printf(QUAD_DEBUG_STR " id=%d", QUAD_DEBUG_DATA(fPart.fCurve), + this->segment()->debugID()); + break; + case SkPath::kConic_Verb: + result.printf(CONIC_DEBUG_STR " id=%d", + CONIC_DEBUG_DATA(fPart.fCurve, fPart.fCurve.fConic.fWeight), + this->segment()->debugID()); + break; + case SkPath::kCubic_Verb: + result.printf(CUBIC_DEBUG_STR " id=%d", CUBIC_DEBUG_DATA(fPart.fCurve), + this->segment()->debugID()); + break; + default: + SkASSERT(0); + } + return result; +} +#endif + +#if DEBUG_SORT +void SkOpAngle::debugLoop() const { + const SkOpAngle* first = this; + const SkOpAngle* next = this; + do { + next->dumpOne(true); + SkDebugf("\n"); + next = next->fNext; + } while (next && next != first); + next = first; + do { + next->debugValidate(); + next = next->fNext; + } while (next && next != first); +} +#endif + +void SkOpAngle::debugValidate() const { +#if DEBUG_COINCIDENCE + if (this->globalState()->debugCheckHealth()) { + return; + } +#endif +#if DEBUG_VALIDATE + const SkOpAngle* first = this; + const SkOpAngle* next = this; + int wind = 0; + int opp = 0; + int lastXor = -1; + int lastOppXor = -1; + do { + if (next->unorderable()) { + return; + } + const SkOpSpan* minSpan = next->start()->starter(next->end()); + if (minSpan->windValue() == SK_MinS32) { + return; + } + bool op = next->segment()->operand(); + bool isXor = next->segment()->isXor(); + bool oppXor = next->segment()->oppXor(); + SkASSERT(!DEBUG_LIMIT_WIND_SUM || between(0, minSpan->windValue(), DEBUG_LIMIT_WIND_SUM)); + SkASSERT(!DEBUG_LIMIT_WIND_SUM + || between(-DEBUG_LIMIT_WIND_SUM, minSpan->oppValue(), DEBUG_LIMIT_WIND_SUM)); + bool useXor = op ? oppXor : isXor; + SkASSERT(lastXor == -1 || lastXor == (int) useXor); + lastXor = (int) useXor; + wind += next->debugSign() * (op ? minSpan->oppValue() : minSpan->windValue()); + if (useXor) { + wind &= 1; + } + useXor = op ? isXor : oppXor; + SkASSERT(lastOppXor == -1 || lastOppXor == (int) useXor); + lastOppXor = (int) useXor; + opp += next->debugSign() * (op ? minSpan->windValue() : minSpan->oppValue()); + if (useXor) { + opp &= 1; + } + next = next->fNext; + } while (next && next != first); + SkASSERT(wind == 0 || !SkPathOpsDebug::gRunFail); + SkASSERT(opp == 0 || !SkPathOpsDebug::gRunFail); +#endif +} + +void SkOpAngle::debugValidateNext() const { +#if !FORCE_RELEASE + const SkOpAngle* first = this; + const SkOpAngle* next = first; + SkTDArray angles; + do { +// SkASSERT_RELEASE(next->fSegment->debugContains(next)); + angles.push_back(next); + next = next->next(); + if (next == first) { + break; + } + SkASSERT_RELEASE(!angles.contains(next)); + if (!next) { + return; + } + } while (true); +#endif +} + +#ifdef SK_DEBUG +void SkCoincidentSpans::debugStartCheck(const SkOpSpanBase* outer, const SkOpSpanBase* over, + const SkOpGlobalState* debugState) const { + SkASSERT(coinPtTEnd()->span() == over || !SkOpGlobalState::DebugRunFail()); + SkASSERT(oppPtTEnd()->span() == outer || !SkOpGlobalState::DebugRunFail()); +} +#endif + +#if DEBUG_COIN +// sets the span's end to the ptT referenced by the previous-next +void SkCoincidentSpans::debugCorrectOneEnd(SkPathOpsDebug::GlitchLog* log, + const SkOpPtT* (SkCoincidentSpans::* getEnd)() const, + void (SkCoincidentSpans::*setEnd)(const SkOpPtT* ptT) const ) const { + const SkOpPtT* origPtT = (this->*getEnd)(); + const SkOpSpanBase* origSpan = origPtT->span(); + const SkOpSpan* prev = origSpan->prev(); + const SkOpPtT* testPtT = prev ? prev->next()->ptT() + : origSpan->upCast()->next()->prev()->ptT(); + if (origPtT != testPtT) { + log->record(SkPathOpsDebug::kCorrectEnd_Glitch, this, origPtT, testPtT); + } +} + + +/* Commented-out lines keep this in sync with correctEnds */ +// FIXME: member pointers have fallen out of favor and can be replaced with +// an alternative approach. +// makes all span ends agree with the segment's spans that define them +void SkCoincidentSpans::debugCorrectEnds(SkPathOpsDebug::GlitchLog* log) const { + this->debugCorrectOneEnd(log, &SkCoincidentSpans::coinPtTStart, nullptr); + this->debugCorrectOneEnd(log, &SkCoincidentSpans::coinPtTEnd, nullptr); + this->debugCorrectOneEnd(log, &SkCoincidentSpans::oppPtTStart, nullptr); + this->debugCorrectOneEnd(log, &SkCoincidentSpans::oppPtTEnd, nullptr); +} + +/* Commented-out lines keep this in sync with expand */ +// expand the range by checking adjacent spans for coincidence +bool SkCoincidentSpans::debugExpand(SkPathOpsDebug::GlitchLog* log) const { + bool expanded = false; + const SkOpSegment* segment = coinPtTStart()->segment(); + const SkOpSegment* oppSegment = oppPtTStart()->segment(); + do { + const SkOpSpan* start = coinPtTStart()->span()->upCast(); + const SkOpSpan* prev = start->prev(); + const SkOpPtT* oppPtT; + if (!prev || !(oppPtT = prev->contains(oppSegment))) { + break; + } + double midT = (prev->t() + start->t()) / 2; + if (!segment->isClose(midT, oppSegment)) { + break; + } + if (log) log->record(SkPathOpsDebug::kExpandCoin_Glitch, this, prev->ptT(), oppPtT); + expanded = true; + } while (false); // actual continues while expansion is possible + do { + const SkOpSpanBase* end = coinPtTEnd()->span(); + SkOpSpanBase* next = end->final() ? nullptr : end->upCast()->next(); + if (next && next->deleted()) { + break; + } + const SkOpPtT* oppPtT; + if (!next || !(oppPtT = next->contains(oppSegment))) { + break; + } + double midT = (end->t() + next->t()) / 2; + if (!segment->isClose(midT, oppSegment)) { + break; + } + if (log) log->record(SkPathOpsDebug::kExpandCoin_Glitch, this, next->ptT(), oppPtT); + expanded = true; + } while (false); // actual continues while expansion is possible + return expanded; +} + +// description below +void SkOpCoincidence::debugAddEndMovedSpans(SkPathOpsDebug::GlitchLog* log, const SkOpSpan* base, const SkOpSpanBase* testSpan) const { + const SkOpPtT* testPtT = testSpan->ptT(); + const SkOpPtT* stopPtT = testPtT; + const SkOpSegment* baseSeg = base->segment(); + while ((testPtT = testPtT->next()) != stopPtT) { + const SkOpSegment* testSeg = testPtT->segment(); + if (testPtT->deleted()) { + continue; + } + if (testSeg == baseSeg) { + continue; + } + if (testPtT->span()->ptT() != testPtT) { + continue; + } + if (this->contains(baseSeg, testSeg, testPtT->fT)) { + continue; + } + // intersect perp with base->ptT() with testPtT->segment() + SkDVector dxdy = baseSeg->dSlopeAtT(base->t()); + const SkPoint& pt = base->pt(); + SkDLine ray = {{{pt.fX, pt.fY}, {pt.fX + dxdy.fY, pt.fY - dxdy.fX}}}; + SkIntersections i; + (*CurveIntersectRay[testSeg->verb()])(testSeg->pts(), testSeg->weight(), ray, &i); + for (int index = 0; index < i.used(); ++index) { + double t = i[0][index]; + if (!between(0, t, 1)) { + continue; + } + SkDPoint oppPt = i.pt(index); + if (!oppPt.approximatelyEqual(pt)) { + continue; + } + SkOpSegment* writableSeg = const_cast(testSeg); + SkOpPtT* oppStart = writableSeg->addT(t); + if (oppStart == testPtT) { + continue; + } + SkOpSpan* writableBase = const_cast(base); + oppStart->span()->addOpp(writableBase); + if (oppStart->deleted()) { + continue; + } + SkOpSegment* coinSeg = base->segment(); + SkOpSegment* oppSeg = oppStart->segment(); + double coinTs, coinTe, oppTs, oppTe; + if (Ordered(coinSeg, oppSeg)) { + coinTs = base->t(); + coinTe = testSpan->t(); + oppTs = oppStart->fT; + oppTe = testPtT->fT; + } else { + using std::swap; + swap(coinSeg, oppSeg); + coinTs = oppStart->fT; + coinTe = testPtT->fT; + oppTs = base->t(); + oppTe = testSpan->t(); + } + if (coinTs > coinTe) { + using std::swap; + swap(coinTs, coinTe); + swap(oppTs, oppTe); + } + bool added; + this->debugAddOrOverlap(log, coinSeg, oppSeg, coinTs, coinTe, oppTs, oppTe, &added); + } + } + return; +} + +// description below +void SkOpCoincidence::debugAddEndMovedSpans(SkPathOpsDebug::GlitchLog* log, const SkOpPtT* ptT) const { + FAIL_IF_COIN(!ptT->span()->upCastable(), ptT->span()); + const SkOpSpan* base = ptT->span()->upCast(); + const SkOpSpan* prev = base->prev(); + FAIL_IF_COIN(!prev, ptT->span()); + if (!prev->isCanceled()) { + this->debugAddEndMovedSpans(log, base, base->prev()); + } + if (!base->isCanceled()) { + this->debugAddEndMovedSpans(log, base, base->next()); + } + return; +} + +/* If A is coincident with B and B includes an endpoint, and A's matching point + is not the endpoint (i.e., there's an implied line connecting B-end and A) + then assume that the same implied line may intersect another curve close to B. + Since we only care about coincidence that was undetected, look at the + ptT list on B-segment adjacent to the B-end/A ptT loop (not in the loop, but + next door) and see if the A matching point is close enough to form another + coincident pair. If so, check for a new coincident span between B-end/A ptT loop + and the adjacent ptT loop. +*/ +void SkOpCoincidence::debugAddEndMovedSpans(SkPathOpsDebug::GlitchLog* log) const { + const SkCoincidentSpans* span = fHead; + if (!span) { + return; + } +// fTop = span; +// fHead = nullptr; + do { + if (span->coinPtTStart()->fPt != span->oppPtTStart()->fPt) { + FAIL_IF_COIN(1 == span->coinPtTStart()->fT, span); + bool onEnd = span->coinPtTStart()->fT == 0; + bool oOnEnd = zero_or_one(span->oppPtTStart()->fT); + if (onEnd) { + if (!oOnEnd) { // if both are on end, any nearby intersect was already found + this->debugAddEndMovedSpans(log, span->oppPtTStart()); + } + } else if (oOnEnd) { + this->debugAddEndMovedSpans(log, span->coinPtTStart()); + } + } + if (span->coinPtTEnd()->fPt != span->oppPtTEnd()->fPt) { + bool onEnd = span->coinPtTEnd()->fT == 1; + bool oOnEnd = zero_or_one(span->oppPtTEnd()->fT); + if (onEnd) { + if (!oOnEnd) { + this->debugAddEndMovedSpans(log, span->oppPtTEnd()); + } + } else if (oOnEnd) { + this->debugAddEndMovedSpans(log, span->coinPtTEnd()); + } + } + } while ((span = span->next())); +// this->restoreHead(); + return; +} + +/* Commented-out lines keep this in sync with addExpanded */ +// for each coincident pair, match the spans +// if the spans don't match, add the mssing pt to the segment and loop it in the opposite span +void SkOpCoincidence::debugAddExpanded(SkPathOpsDebug::GlitchLog* log) const { +// DEBUG_SET_PHASE(); + const SkCoincidentSpans* coin = this->fHead; + if (!coin) { + return; + } + do { + const SkOpPtT* startPtT = coin->coinPtTStart(); + const SkOpPtT* oStartPtT = coin->oppPtTStart(); + double priorT = startPtT->fT; + double oPriorT = oStartPtT->fT; + FAIL_IF_COIN(!startPtT->contains(oStartPtT), coin); + SkOPASSERT(coin->coinPtTEnd()->contains(coin->oppPtTEnd())); + const SkOpSpanBase* start = startPtT->span(); + const SkOpSpanBase* oStart = oStartPtT->span(); + const SkOpSpanBase* end = coin->coinPtTEnd()->span(); + const SkOpSpanBase* oEnd = coin->oppPtTEnd()->span(); + FAIL_IF_COIN(oEnd->deleted(), coin); + FAIL_IF_COIN(!start->upCastable(), coin); + const SkOpSpanBase* test = start->upCast()->next(); + FAIL_IF_COIN(!coin->flipped() && !oStart->upCastable(), coin); + const SkOpSpanBase* oTest = coin->flipped() ? oStart->prev() : oStart->upCast()->next(); + FAIL_IF_COIN(!oTest, coin); + const SkOpSegment* seg = start->segment(); + const SkOpSegment* oSeg = oStart->segment(); + while (test != end || oTest != oEnd) { + const SkOpPtT* containedOpp = test->ptT()->contains(oSeg); + const SkOpPtT* containedThis = oTest->ptT()->contains(seg); + if (!containedOpp || !containedThis) { + // choose the ends, or the first common pt-t list shared by both + double nextT, oNextT; + if (containedOpp) { + nextT = test->t(); + oNextT = containedOpp->fT; + } else if (containedThis) { + nextT = containedThis->fT; + oNextT = oTest->t(); + } else { + // iterate through until a pt-t list found that contains the other + const SkOpSpanBase* walk = test; + const SkOpPtT* walkOpp; + do { + FAIL_IF_COIN(!walk->upCastable(), coin); + walk = walk->upCast()->next(); + } while (!(walkOpp = walk->ptT()->contains(oSeg)) + && walk != coin->coinPtTEnd()->span()); + FAIL_IF_COIN(!walkOpp, coin); + nextT = walk->t(); + oNextT = walkOpp->fT; + } + // use t ranges to guess which one is missing + double startRange = nextT - priorT; + FAIL_IF_COIN(!startRange, coin); + double startPart = (test->t() - priorT) / startRange; + double oStartRange = oNextT - oPriorT; + FAIL_IF_COIN(!oStartRange, coin); + double oStartPart = (oTest->t() - oStartPtT->fT) / oStartRange; + FAIL_IF_COIN(startPart == oStartPart, coin); + bool addToOpp = !containedOpp && !containedThis ? startPart < oStartPart + : !!containedThis; + bool startOver = false; + addToOpp ? log->record(SkPathOpsDebug::kAddExpandedCoin_Glitch, + oPriorT + oStartRange * startPart, test) + : log->record(SkPathOpsDebug::kAddExpandedCoin_Glitch, + priorT + startRange * oStartPart, oTest); + // FAIL_IF_COIN(!success, coin); + if (startOver) { + test = start; + oTest = oStart; + } + end = coin->coinPtTEnd()->span(); + oEnd = coin->oppPtTEnd()->span(); + } + if (test != end) { + FAIL_IF_COIN(!test->upCastable(), coin); + priorT = test->t(); + test = test->upCast()->next(); + } + if (oTest != oEnd) { + oPriorT = oTest->t(); + oTest = coin->flipped() ? oTest->prev() : oTest->upCast()->next(); + FAIL_IF_COIN(!oTest, coin); + } + } + } while ((coin = coin->next())); + return; +} + +/* Commented-out lines keep this in sync addIfMissing() */ +// note that over1s, over1e, over2s, over2e are ordered +void SkOpCoincidence::debugAddIfMissing(SkPathOpsDebug::GlitchLog* log, const SkOpPtT* over1s, const SkOpPtT* over2s, + double tStart, double tEnd, const SkOpSegment* coinSeg, const SkOpSegment* oppSeg, bool* added, + const SkOpPtT* over1e, const SkOpPtT* over2e) const { + SkASSERT(tStart < tEnd); + SkASSERT(over1s->fT < over1e->fT); + SkASSERT(between(over1s->fT, tStart, over1e->fT)); + SkASSERT(between(over1s->fT, tEnd, over1e->fT)); + SkASSERT(over2s->fT < over2e->fT); + SkASSERT(between(over2s->fT, tStart, over2e->fT)); + SkASSERT(between(over2s->fT, tEnd, over2e->fT)); + SkASSERT(over1s->segment() == over1e->segment()); + SkASSERT(over2s->segment() == over2e->segment()); + SkASSERT(over1s->segment() == over2s->segment()); + SkASSERT(over1s->segment() != coinSeg); + SkASSERT(over1s->segment() != oppSeg); + SkASSERT(coinSeg != oppSeg); + double coinTs, coinTe, oppTs, oppTe; + coinTs = TRange(over1s, tStart, coinSeg SkDEBUGPARAMS(over1e)); + coinTe = TRange(over1s, tEnd, coinSeg SkDEBUGPARAMS(over1e)); + SkOpSpanBase::Collapsed result = coinSeg->collapsed(coinTs, coinTe); + if (SkOpSpanBase::Collapsed::kNo != result) { + return log->record(SkPathOpsDebug::kAddIfCollapsed_Glitch, coinSeg); + } + oppTs = TRange(over2s, tStart, oppSeg SkDEBUGPARAMS(over2e)); + oppTe = TRange(over2s, tEnd, oppSeg SkDEBUGPARAMS(over2e)); + result = oppSeg->collapsed(oppTs, oppTe); + if (SkOpSpanBase::Collapsed::kNo != result) { + return log->record(SkPathOpsDebug::kAddIfCollapsed_Glitch, oppSeg); + } + if (coinTs > coinTe) { + using std::swap; + swap(coinTs, coinTe); + swap(oppTs, oppTe); + } + this->debugAddOrOverlap(log, coinSeg, oppSeg, coinTs, coinTe, oppTs, oppTe, added); + return; +} + +/* Commented-out lines keep this in sync addOrOverlap() */ +// If this is called by addEndMovedSpans(), a returned false propogates out to an abort. +// If this is called by AddIfMissing(), a returned false indicates there was nothing to add +void SkOpCoincidence::debugAddOrOverlap(SkPathOpsDebug::GlitchLog* log, + const SkOpSegment* coinSeg, const SkOpSegment* oppSeg, + double coinTs, double coinTe, double oppTs, double oppTe, bool* added) const { + SkTDArray overlaps; + SkOPASSERT(!fTop); // this is (correctly) reversed in addifMissing() + if (fTop && !this->checkOverlap(fTop, coinSeg, oppSeg, coinTs, coinTe, oppTs, oppTe, + &overlaps)) { + return; + } + if (fHead && !this->checkOverlap(fHead, coinSeg, oppSeg, coinTs, + coinTe, oppTs, oppTe, &overlaps)) { + return; + } + const SkCoincidentSpans* overlap = overlaps.count() ? overlaps[0] : nullptr; + for (int index = 1; index < overlaps.count(); ++index) { // combine overlaps before continuing + const SkCoincidentSpans* test = overlaps[index]; + if (overlap->coinPtTStart()->fT > test->coinPtTStart()->fT) { + log->record(SkPathOpsDebug::kAddOrOverlap_Glitch, overlap, test->coinPtTStart()); + } + if (overlap->coinPtTEnd()->fT < test->coinPtTEnd()->fT) { + log->record(SkPathOpsDebug::kAddOrOverlap_Glitch, overlap, test->coinPtTEnd()); + } + if (overlap->flipped() + ? overlap->oppPtTStart()->fT < test->oppPtTStart()->fT + : overlap->oppPtTStart()->fT > test->oppPtTStart()->fT) { + log->record(SkPathOpsDebug::kAddOrOverlap_Glitch, overlap, test->oppPtTStart()); + } + if (overlap->flipped() + ? overlap->oppPtTEnd()->fT > test->oppPtTEnd()->fT + : overlap->oppPtTEnd()->fT < test->oppPtTEnd()->fT) { + log->record(SkPathOpsDebug::kAddOrOverlap_Glitch, overlap, test->oppPtTEnd()); + } + if (!fHead) { this->debugRelease(log, fHead, test); + this->debugRelease(log, fTop, test); + } + } + const SkOpPtT* cs = coinSeg->existing(coinTs, oppSeg); + const SkOpPtT* ce = coinSeg->existing(coinTe, oppSeg); + RETURN_FALSE_IF(overlap && cs && ce && overlap->contains(cs, ce), coinSeg); + RETURN_FALSE_IF(cs != ce || !cs, coinSeg); + const SkOpPtT* os = oppSeg->existing(oppTs, coinSeg); + const SkOpPtT* oe = oppSeg->existing(oppTe, coinSeg); + RETURN_FALSE_IF(overlap && os && oe && overlap->contains(os, oe), oppSeg); + SkASSERT(true || !cs || !cs->deleted()); + SkASSERT(true || !os || !os->deleted()); + SkASSERT(true || !ce || !ce->deleted()); + SkASSERT(true || !oe || !oe->deleted()); + const SkOpPtT* csExisting = !cs ? coinSeg->existing(coinTs, nullptr) : nullptr; + const SkOpPtT* ceExisting = !ce ? coinSeg->existing(coinTe, nullptr) : nullptr; + RETURN_FALSE_IF(csExisting && csExisting == ceExisting, coinSeg); + RETURN_FALSE_IF(csExisting && (csExisting == ce || + csExisting->contains(ceExisting ? ceExisting : ce)), coinSeg); + RETURN_FALSE_IF(ceExisting && (ceExisting == cs || + ceExisting->contains(csExisting ? csExisting : cs)), coinSeg); + const SkOpPtT* osExisting = !os ? oppSeg->existing(oppTs, nullptr) : nullptr; + const SkOpPtT* oeExisting = !oe ? oppSeg->existing(oppTe, nullptr) : nullptr; + RETURN_FALSE_IF(osExisting && osExisting == oeExisting, oppSeg); + RETURN_FALSE_IF(osExisting && (osExisting == oe || + osExisting->contains(oeExisting ? oeExisting : oe)), oppSeg); + RETURN_FALSE_IF(oeExisting && (oeExisting == os || + oeExisting->contains(osExisting ? osExisting : os)), oppSeg); + bool csDeleted = false, osDeleted = false, ceDeleted = false, oeDeleted = false; + this->debugValidate(); + if (!cs || !os) { + if (!cs) + cs = coinSeg->debugAddT(coinTs, log); + if (!os) + os = oppSeg->debugAddT(oppTs, log); +// RETURN_FALSE_IF(callerAborts, !csWritable || !osWritable); + if (cs && os) cs->span()->debugAddOpp(log, os->span()); +// cs = csWritable; +// os = osWritable->active(); + RETURN_FALSE_IF((ce && ce->deleted()) || (oe && oe->deleted()), coinSeg); + } + if (!ce || !oe) { + if (!ce) + ce = coinSeg->debugAddT(coinTe, log); + if (!oe) + oe = oppSeg->debugAddT(oppTe, log); + if (ce && oe) ce->span()->debugAddOpp(log, oe->span()); +// ce = ceWritable; +// oe = oeWritable; + } + this->debugValidate(); + RETURN_FALSE_IF(csDeleted, coinSeg); + RETURN_FALSE_IF(osDeleted, oppSeg); + RETURN_FALSE_IF(ceDeleted, coinSeg); + RETURN_FALSE_IF(oeDeleted, oppSeg); + RETURN_FALSE_IF(!cs || !ce || cs == ce || cs->contains(ce) || !os || !oe || os == oe || os->contains(oe), coinSeg); + bool result = true; + if (overlap) { + if (overlap->coinPtTStart()->segment() == coinSeg) { + log->record(SkPathOpsDebug::kAddMissingExtend_Glitch, coinSeg, coinTs, coinTe, oppSeg, oppTs, oppTe); + } else { + if (oppTs > oppTe) { + using std::swap; + swap(coinTs, coinTe); + swap(oppTs, oppTe); + } + log->record(SkPathOpsDebug::kAddMissingExtend_Glitch, oppSeg, oppTs, oppTe, coinSeg, coinTs, coinTe); + } +#if 0 && DEBUG_COINCIDENCE_VERBOSE + if (result) { + overlap->debugShow(); + } +#endif + } else { + log->record(SkPathOpsDebug::kAddMissingCoin_Glitch, coinSeg, coinTs, coinTe, oppSeg, oppTs, oppTe); +#if 0 && DEBUG_COINCIDENCE_VERBOSE + fHead->debugShow(); +#endif + } + this->debugValidate(); + return (void) result; +} + +// Extra commented-out lines keep this in sync with addMissing() +/* detects overlaps of different coincident runs on same segment */ +/* does not detect overlaps for pairs without any segments in common */ +// returns true if caller should loop again +void SkOpCoincidence::debugAddMissing(SkPathOpsDebug::GlitchLog* log, bool* added) const { + const SkCoincidentSpans* outer = fHead; + *added = false; + if (!outer) { + return; + } + // fTop = outer; + // fHead = nullptr; + do { + // addifmissing can modify the list that this is walking + // save head so that walker can iterate over old data unperturbed + // addifmissing adds to head freely then add saved head in the end + const SkOpPtT* ocs = outer->coinPtTStart(); + SkASSERT(!ocs->deleted()); + const SkOpSegment* outerCoin = ocs->segment(); + SkASSERT(!outerCoin->done()); // if it's done, should have already been removed from list + const SkOpPtT* oos = outer->oppPtTStart(); + if (oos->deleted()) { + return; + } + const SkOpSegment* outerOpp = oos->segment(); + SkASSERT(!outerOpp->done()); +// SkOpSegment* outerCoinWritable = const_cast(outerCoin); +// SkOpSegment* outerOppWritable = const_cast(outerOpp); + const SkCoincidentSpans* inner = outer; + while ((inner = inner->next())) { + this->debugValidate(); + double overS, overE; + const SkOpPtT* ics = inner->coinPtTStart(); + SkASSERT(!ics->deleted()); + const SkOpSegment* innerCoin = ics->segment(); + SkASSERT(!innerCoin->done()); + const SkOpPtT* ios = inner->oppPtTStart(); + SkASSERT(!ios->deleted()); + const SkOpSegment* innerOpp = ios->segment(); + SkASSERT(!innerOpp->done()); +// SkOpSegment* innerCoinWritable = const_cast(innerCoin); +// SkOpSegment* innerOppWritable = const_cast(innerOpp); + if (outerCoin == innerCoin) { + const SkOpPtT* oce = outer->coinPtTEnd(); + if (oce->deleted()) { + return; + } + const SkOpPtT* ice = inner->coinPtTEnd(); + SkASSERT(!ice->deleted()); + if (outerOpp != innerOpp && this->overlap(ocs, oce, ics, ice, &overS, &overE)) { + this->debugAddIfMissing(log, ocs->starter(oce), ics->starter(ice), + overS, overE, outerOpp, innerOpp, added, + ocs->debugEnder(oce), + ics->debugEnder(ice)); + } + } else if (outerCoin == innerOpp) { + const SkOpPtT* oce = outer->coinPtTEnd(); + SkASSERT(!oce->deleted()); + const SkOpPtT* ioe = inner->oppPtTEnd(); + SkASSERT(!ioe->deleted()); + if (outerOpp != innerCoin && this->overlap(ocs, oce, ios, ioe, &overS, &overE)) { + this->debugAddIfMissing(log, ocs->starter(oce), ios->starter(ioe), + overS, overE, outerOpp, innerCoin, added, + ocs->debugEnder(oce), + ios->debugEnder(ioe)); + } + } else if (outerOpp == innerCoin) { + const SkOpPtT* ooe = outer->oppPtTEnd(); + SkASSERT(!ooe->deleted()); + const SkOpPtT* ice = inner->coinPtTEnd(); + SkASSERT(!ice->deleted()); + SkASSERT(outerCoin != innerOpp); + if (this->overlap(oos, ooe, ics, ice, &overS, &overE)) { + this->debugAddIfMissing(log, oos->starter(ooe), ics->starter(ice), + overS, overE, outerCoin, innerOpp, added, + oos->debugEnder(ooe), + ics->debugEnder(ice)); + } + } else if (outerOpp == innerOpp) { + const SkOpPtT* ooe = outer->oppPtTEnd(); + SkASSERT(!ooe->deleted()); + const SkOpPtT* ioe = inner->oppPtTEnd(); + if (ioe->deleted()) { + return; + } + SkASSERT(outerCoin != innerCoin); + if (this->overlap(oos, ooe, ios, ioe, &overS, &overE)) { + this->debugAddIfMissing(log, oos->starter(ooe), ios->starter(ioe), + overS, overE, outerCoin, innerCoin, added, + oos->debugEnder(ooe), + ios->debugEnder(ioe)); + } + } + this->debugValidate(); + } + } while ((outer = outer->next())); + // this->restoreHead(); + return; +} + +// Commented-out lines keep this in sync with release() +void SkOpCoincidence::debugRelease(SkPathOpsDebug::GlitchLog* log, const SkCoincidentSpans* coin, const SkCoincidentSpans* remove) const { + const SkCoincidentSpans* head = coin; + const SkCoincidentSpans* prev = nullptr; + const SkCoincidentSpans* next; + do { + next = coin->next(); + if (coin == remove) { + if (prev) { +// prev->setNext(next); + } else if (head == fHead) { +// fHead = next; + } else { +// fTop = next; + } + log->record(SkPathOpsDebug::kReleasedSpan_Glitch, coin); + } + prev = coin; + } while ((coin = next)); + return; +} + +void SkOpCoincidence::debugRelease(SkPathOpsDebug::GlitchLog* log, const SkOpSegment* deleted) const { + const SkCoincidentSpans* coin = fHead; + if (!coin) { + return; + } + do { + if (coin->coinPtTStart()->segment() == deleted + || coin->coinPtTEnd()->segment() == deleted + || coin->oppPtTStart()->segment() == deleted + || coin->oppPtTEnd()->segment() == deleted) { + log->record(SkPathOpsDebug::kReleasedSpan_Glitch, coin); + } + } while ((coin = coin->next())); +} + +// Commented-out lines keep this in sync with expand() +// expand the range by checking adjacent spans for coincidence +bool SkOpCoincidence::debugExpand(SkPathOpsDebug::GlitchLog* log) const { + const SkCoincidentSpans* coin = fHead; + if (!coin) { + return false; + } + bool expanded = false; + do { + if (coin->debugExpand(log)) { + // check to see if multiple spans expanded so they are now identical + const SkCoincidentSpans* test = fHead; + do { + if (coin == test) { + continue; + } + if (coin->coinPtTStart() == test->coinPtTStart() + && coin->oppPtTStart() == test->oppPtTStart()) { + if (log) log->record(SkPathOpsDebug::kExpandCoin_Glitch, fHead, test->coinPtTStart()); + break; + } + } while ((test = test->next())); + expanded = true; + } + } while ((coin = coin->next())); + return expanded; +} + +// Commented-out lines keep this in sync with mark() +/* this sets up the coincidence links in the segments when the coincidence crosses multiple spans */ +void SkOpCoincidence::debugMark(SkPathOpsDebug::GlitchLog* log) const { + const SkCoincidentSpans* coin = fHead; + if (!coin) { + return; + } + do { + FAIL_IF_COIN(!coin->coinPtTStartWritable()->span()->upCastable(), coin); + const SkOpSpan* start = coin->coinPtTStartWritable()->span()->upCast(); +// SkASSERT(start->deleted()); + const SkOpSpanBase* end = coin->coinPtTEndWritable()->span(); +// SkASSERT(end->deleted()); + const SkOpSpanBase* oStart = coin->oppPtTStartWritable()->span(); +// SkASSERT(oStart->deleted()); + const SkOpSpanBase* oEnd = coin->oppPtTEndWritable()->span(); +// SkASSERT(oEnd->deleted()); + bool flipped = coin->flipped(); + if (flipped) { + using std::swap; + swap(oStart, oEnd); + } + /* coin and opp spans may not match up. Mark the ends, and then let the interior + get marked as many times as the spans allow */ + start->debugInsertCoincidence(log, oStart->upCast()); + end->debugInsertCoinEnd(log, oEnd); + const SkOpSegment* segment = start->segment(); + const SkOpSegment* oSegment = oStart->segment(); + const SkOpSpanBase* next = start; + const SkOpSpanBase* oNext = oStart; + bool ordered; + FAIL_IF_COIN(!coin->ordered(&ordered), coin); + while ((next = next->upCast()->next()) != end) { + FAIL_IF_COIN(!next->upCastable(), coin); + next->upCast()->debugInsertCoincidence(log, oSegment, flipped, ordered); + } + while ((oNext = oNext->upCast()->next()) != oEnd) { + FAIL_IF_COIN(!oNext->upCastable(), coin); + oNext->upCast()->debugInsertCoincidence(log, segment, flipped, ordered); + } + } while ((coin = coin->next())); + return; +} +#endif // DEBUG_COIN + +#if DEBUG_COIN +// Commented-out lines keep this in sync with markCollapsed() +void SkOpCoincidence::debugMarkCollapsed(SkPathOpsDebug::GlitchLog* log, const SkCoincidentSpans* coin, const SkOpPtT* test) const { + const SkCoincidentSpans* head = coin; + while (coin) { + if (coin->collapsed(test)) { + if (zero_or_one(coin->coinPtTStart()->fT) && zero_or_one(coin->coinPtTEnd()->fT)) { + log->record(SkPathOpsDebug::kCollapsedCoin_Glitch, coin); + } + if (zero_or_one(coin->oppPtTStart()->fT) && zero_or_one(coin->oppPtTEnd()->fT)) { + log->record(SkPathOpsDebug::kCollapsedCoin_Glitch, coin); + } + this->debugRelease(log, head, coin); + } + coin = coin->next(); + } +} + +// Commented-out lines keep this in sync with markCollapsed() +void SkOpCoincidence::debugMarkCollapsed(SkPathOpsDebug::GlitchLog* log, const SkOpPtT* test) const { + this->debugMarkCollapsed(log, fHead, test); + this->debugMarkCollapsed(log, fTop, test); +} +#endif // DEBUG_COIN + +void SkCoincidentSpans::debugShow() const { + SkDebugf("coinSpan - id=%d t=%1.9g tEnd=%1.9g\n", coinPtTStart()->segment()->debugID(), + coinPtTStart()->fT, coinPtTEnd()->fT); + SkDebugf("coinSpan + id=%d t=%1.9g tEnd=%1.9g\n", oppPtTStart()->segment()->debugID(), + oppPtTStart()->fT, oppPtTEnd()->fT); +} + +void SkOpCoincidence::debugShowCoincidence() const { +#if DEBUG_COINCIDENCE + const SkCoincidentSpans* span = fHead; + while (span) { + span->debugShow(); + span = span->next(); + } +#endif // DEBUG_COINCIDENCE +} + +#if DEBUG_COIN +static void DebugCheckBetween(const SkOpSpanBase* next, const SkOpSpanBase* end, + double oStart, double oEnd, const SkOpSegment* oSegment, + SkPathOpsDebug::GlitchLog* log) { + SkASSERT(next != end); + SkASSERT(!next->contains(end) || log); + if (next->t() > end->t()) { + using std::swap; + swap(next, end); + } + do { + const SkOpPtT* ptT = next->ptT(); + int index = 0; + bool somethingBetween = false; + do { + ++index; + ptT = ptT->next(); + const SkOpPtT* checkPtT = next->ptT(); + if (ptT == checkPtT) { + break; + } + bool looped = false; + for (int check = 0; check < index; ++check) { + if ((looped = checkPtT == ptT)) { + break; + } + checkPtT = checkPtT->next(); + } + if (looped) { + SkASSERT(0); + break; + } + if (ptT->deleted()) { + continue; + } + if (ptT->segment() != oSegment) { + continue; + } + somethingBetween |= between(oStart, ptT->fT, oEnd); + } while (true); + SkASSERT(somethingBetween); + } while (next != end && (next = next->upCast()->next())); +} + +static void DebugCheckOverlap(const SkCoincidentSpans* test, const SkCoincidentSpans* list, + SkPathOpsDebug::GlitchLog* log) { + if (!list) { + return; + } + const SkOpSegment* coinSeg = test->coinPtTStart()->segment(); + SkASSERT(coinSeg == test->coinPtTEnd()->segment()); + const SkOpSegment* oppSeg = test->oppPtTStart()->segment(); + SkASSERT(oppSeg == test->oppPtTEnd()->segment()); + SkASSERT(coinSeg != test->oppPtTStart()->segment()); + SkDEBUGCODE(double tcs = test->coinPtTStart()->fT); + SkASSERT(between(0, tcs, 1)); + SkDEBUGCODE(double tce = test->coinPtTEnd()->fT); + SkASSERT(between(0, tce, 1)); + SkASSERT(tcs < tce); + double tos = test->oppPtTStart()->fT; + SkASSERT(between(0, tos, 1)); + double toe = test->oppPtTEnd()->fT; + SkASSERT(between(0, toe, 1)); + SkASSERT(tos != toe); + if (tos > toe) { + using std::swap; + swap(tos, toe); + } + do { + double lcs, lce, los, loe; + if (coinSeg == list->coinPtTStart()->segment()) { + if (oppSeg != list->oppPtTStart()->segment()) { + continue; + } + lcs = list->coinPtTStart()->fT; + lce = list->coinPtTEnd()->fT; + los = list->oppPtTStart()->fT; + loe = list->oppPtTEnd()->fT; + if (los > loe) { + using std::swap; + swap(los, loe); + } + } else if (coinSeg == list->oppPtTStart()->segment()) { + if (oppSeg != list->coinPtTStart()->segment()) { + continue; + } + lcs = list->oppPtTStart()->fT; + lce = list->oppPtTEnd()->fT; + if (lcs > lce) { + using std::swap; + swap(lcs, lce); + } + los = list->coinPtTStart()->fT; + loe = list->coinPtTEnd()->fT; + } else { + continue; + } + SkASSERT(tce < lcs || lce < tcs); + SkASSERT(toe < los || loe < tos); + } while ((list = list->next())); +} + + +static void DebugCheckOverlapTop(const SkCoincidentSpans* head, const SkCoincidentSpans* opt, + SkPathOpsDebug::GlitchLog* log) { + // check for overlapping coincident spans + const SkCoincidentSpans* test = head; + while (test) { + const SkCoincidentSpans* next = test->next(); + DebugCheckOverlap(test, next, log); + DebugCheckOverlap(test, opt, log); + test = next; + } +} + +static void DebugValidate(const SkCoincidentSpans* head, const SkCoincidentSpans* opt, + SkPathOpsDebug::GlitchLog* log) { + // look for pts inside coincident spans that are not inside the opposite spans + const SkCoincidentSpans* coin = head; + while (coin) { + SkASSERT(SkOpCoincidence::Ordered(coin->coinPtTStart()->segment(), + coin->oppPtTStart()->segment())); + SkASSERT(coin->coinPtTStart()->span()->ptT() == coin->coinPtTStart()); + SkASSERT(coin->coinPtTEnd()->span()->ptT() == coin->coinPtTEnd()); + SkASSERT(coin->oppPtTStart()->span()->ptT() == coin->oppPtTStart()); + SkASSERT(coin->oppPtTEnd()->span()->ptT() == coin->oppPtTEnd()); + coin = coin->next(); + } + DebugCheckOverlapTop(head, opt, log); +} +#endif // DEBUG_COIN + +void SkOpCoincidence::debugValidate() const { +#if DEBUG_COINCIDENCE + DebugValidate(fHead, fTop, nullptr); + DebugValidate(fTop, nullptr, nullptr); +#endif +} + +#if DEBUG_COIN +static void DebugCheckBetween(const SkCoincidentSpans* head, const SkCoincidentSpans* opt, + SkPathOpsDebug::GlitchLog* log) { + // look for pts inside coincident spans that are not inside the opposite spans + const SkCoincidentSpans* coin = head; + while (coin) { + DebugCheckBetween(coin->coinPtTStart()->span(), coin->coinPtTEnd()->span(), + coin->oppPtTStart()->fT, coin->oppPtTEnd()->fT, coin->oppPtTStart()->segment(), + log); + DebugCheckBetween(coin->oppPtTStart()->span(), coin->oppPtTEnd()->span(), + coin->coinPtTStart()->fT, coin->coinPtTEnd()->fT, coin->coinPtTStart()->segment(), + log); + coin = coin->next(); + } + DebugCheckOverlapTop(head, opt, log); +} +#endif + +void SkOpCoincidence::debugCheckBetween() const { +#if DEBUG_COINCIDENCE + if (fGlobalState->debugCheckHealth()) { + return; + } + DebugCheckBetween(fHead, fTop, nullptr); + DebugCheckBetween(fTop, nullptr, nullptr); +#endif +} + +#if DEBUG_COIN +void SkOpContour::debugCheckHealth(SkPathOpsDebug::GlitchLog* log) const { + const SkOpSegment* segment = &fHead; + do { + segment->debugCheckHealth(log); + } while ((segment = segment->next())); +} + +void SkOpCoincidence::debugCheckValid(SkPathOpsDebug::GlitchLog* log) const { +#if DEBUG_VALIDATE + DebugValidate(fHead, fTop, log); + DebugValidate(fTop, nullptr, log); +#endif +} + +void SkOpCoincidence::debugCorrectEnds(SkPathOpsDebug::GlitchLog* log) const { + const SkCoincidentSpans* coin = fHead; + if (!coin) { + return; + } + do { + coin->debugCorrectEnds(log); + } while ((coin = coin->next())); +} + +// commmented-out lines keep this aligned with missingCoincidence() +void SkOpContour::debugMissingCoincidence(SkPathOpsDebug::GlitchLog* log) const { +// SkASSERT(fCount > 0); + const SkOpSegment* segment = &fHead; +// bool result = false; + do { + segment->debugMissingCoincidence(log); + segment = segment->next(); + } while (segment); + return; +} + +void SkOpContour::debugMoveMultiples(SkPathOpsDebug::GlitchLog* log) const { + SkASSERT(fCount > 0); + const SkOpSegment* segment = &fHead; + do { + segment->debugMoveMultiples(log); + } while ((segment = segment->next())); + return; +} + +void SkOpContour::debugMoveNearby(SkPathOpsDebug::GlitchLog* log) const { + SkASSERT(fCount > 0); + const SkOpSegment* segment = &fHead; + do { + segment->debugMoveNearby(log); + } while ((segment = segment->next())); +} +#endif + +#if DEBUG_COINCIDENCE_ORDER +void SkOpSegment::debugResetCoinT() const { + fDebugBaseIndex = -1; + fDebugBaseMin = 1; + fDebugBaseMax = -1; + fDebugLastIndex = -1; + fDebugLastMin = 1; + fDebugLastMax = -1; +} +#endif + +void SkOpSegment::debugValidate() const { +#if DEBUG_COINCIDENCE_ORDER + { + const SkOpSpanBase* span = &fHead; + do { + span->debugResetCoinT(); + } while (!span->final() && (span = span->upCast()->next())); + span = &fHead; + int index = 0; + do { + span->debugSetCoinT(index++); + } while (!span->final() && (span = span->upCast()->next())); + } +#endif +#if DEBUG_COINCIDENCE + if (this->globalState()->debugCheckHealth()) { + return; + } +#endif +#if DEBUG_VALIDATE + const SkOpSpanBase* span = &fHead; + double lastT = -1; + const SkOpSpanBase* prev = nullptr; + int count = 0; + int done = 0; + do { + if (!span->final()) { + ++count; + done += span->upCast()->done() ? 1 : 0; + } + SkASSERT(span->segment() == this); + SkASSERT(!prev || prev->upCast()->next() == span); + SkASSERT(!prev || prev == span->prev()); + prev = span; + double t = span->ptT()->fT; + SkASSERT(lastT < t); + lastT = t; + span->debugValidate(); + } while (!span->final() && (span = span->upCast()->next())); + SkASSERT(count == fCount); + SkASSERT(done == fDoneCount); + SkASSERT(count >= fDoneCount); + SkASSERT(span->final()); + span->debugValidate(); +#endif +} + +#if DEBUG_COIN + +// Commented-out lines keep this in sync with addOpp() +void SkOpSpanBase::debugAddOpp(SkPathOpsDebug::GlitchLog* log, const SkOpSpanBase* opp) const { + const SkOpPtT* oppPrev = this->ptT()->oppPrev(opp->ptT()); + if (!oppPrev) { + return; + } + this->debugMergeMatches(log, opp); + this->ptT()->debugAddOpp(opp->ptT(), oppPrev); + this->debugCheckForCollapsedCoincidence(log); +} + +// Commented-out lines keep this in sync with checkForCollapsedCoincidence() +void SkOpSpanBase::debugCheckForCollapsedCoincidence(SkPathOpsDebug::GlitchLog* log) const { + const SkOpCoincidence* coins = this->globalState()->coincidence(); + if (coins->isEmpty()) { + return; + } +// the insert above may have put both ends of a coincident run in the same span +// for each coincident ptT in loop; see if its opposite in is also in the loop +// this implementation is the motivation for marking that a ptT is referenced by a coincident span + const SkOpPtT* head = this->ptT(); + const SkOpPtT* test = head; + do { + if (!test->coincident()) { + continue; + } + coins->debugMarkCollapsed(log, test); + } while ((test = test->next()) != head); +} +#endif + +bool SkOpSpanBase::debugCoinEndLoopCheck() const { + int loop = 0; + const SkOpSpanBase* next = this; + SkOpSpanBase* nextCoin; + do { + nextCoin = next->fCoinEnd; + SkASSERT(nextCoin == this || nextCoin->fCoinEnd != nextCoin); + for (int check = 1; check < loop - 1; ++check) { + const SkOpSpanBase* checkCoin = this->fCoinEnd; + const SkOpSpanBase* innerCoin = checkCoin; + for (int inner = check + 1; inner < loop; ++inner) { + innerCoin = innerCoin->fCoinEnd; + if (checkCoin == innerCoin) { + SkDebugf("*** bad coincident end loop ***\n"); + return false; + } + } + } + ++loop; + } while ((next = nextCoin) && next != this); + return true; +} + +#if DEBUG_COIN +// Commented-out lines keep this in sync with insertCoinEnd() +void SkOpSpanBase::debugInsertCoinEnd(SkPathOpsDebug::GlitchLog* log, const SkOpSpanBase* coin) const { + if (containsCoinEnd(coin)) { +// SkASSERT(coin->containsCoinEnd(this)); + return; + } + debugValidate(); +// SkASSERT(this != coin); + log->record(SkPathOpsDebug::kMarkCoinEnd_Glitch, this, coin); +// coin->fCoinEnd = this->fCoinEnd; +// this->fCoinEnd = coinNext; + debugValidate(); +} + +// Commented-out lines keep this in sync with mergeMatches() +// Look to see if pt-t linked list contains same segment more than once +// if so, and if each pt-t is directly pointed to by spans in that segment, +// merge them +// keep the points, but remove spans so that the segment doesn't have 2 or more +// spans pointing to the same pt-t loop at different loop elements +void SkOpSpanBase::debugMergeMatches(SkPathOpsDebug::GlitchLog* log, const SkOpSpanBase* opp) const { + const SkOpPtT* test = &fPtT; + const SkOpPtT* testNext; + const SkOpPtT* stop = test; + do { + testNext = test->next(); + if (test->deleted()) { + continue; + } + const SkOpSpanBase* testBase = test->span(); + SkASSERT(testBase->ptT() == test); + const SkOpSegment* segment = test->segment(); + if (segment->done()) { + continue; + } + const SkOpPtT* inner = opp->ptT(); + const SkOpPtT* innerStop = inner; + do { + if (inner->segment() != segment) { + continue; + } + if (inner->deleted()) { + continue; + } + const SkOpSpanBase* innerBase = inner->span(); + SkASSERT(innerBase->ptT() == inner); + // when the intersection is first detected, the span base is marked if there are + // more than one point in the intersection. +// if (!innerBase->hasMultipleHint() && !testBase->hasMultipleHint()) { + if (!zero_or_one(inner->fT)) { + log->record(SkPathOpsDebug::kMergeMatches_Glitch, innerBase, test); + } else { + SkASSERT(inner->fT != test->fT); + if (!zero_or_one(test->fT)) { + log->record(SkPathOpsDebug::kMergeMatches_Glitch, testBase, inner); + } else { + log->record(SkPathOpsDebug::kMergeMatches_Glitch, segment); +// SkDEBUGCODE(testBase->debugSetDeleted()); +// test->setDeleted(); +// SkDEBUGCODE(innerBase->debugSetDeleted()); +// inner->setDeleted(); + } + } +#ifdef SK_DEBUG // assert if another undeleted entry points to segment + const SkOpPtT* debugInner = inner; + while ((debugInner = debugInner->next()) != innerStop) { + if (debugInner->segment() != segment) { + continue; + } + if (debugInner->deleted()) { + continue; + } + SkOPASSERT(0); + } +#endif + break; +// } + break; + } while ((inner = inner->next()) != innerStop); + } while ((test = testNext) != stop); + this->debugCheckForCollapsedCoincidence(log); +} + +#endif + +void SkOpSpanBase::debugResetCoinT() const { +#if DEBUG_COINCIDENCE_ORDER + const SkOpPtT* ptT = &fPtT; + do { + ptT->debugResetCoinT(); + ptT = ptT->next(); + } while (ptT != &fPtT); +#endif +} + +void SkOpSpanBase::debugSetCoinT(int index) const { +#if DEBUG_COINCIDENCE_ORDER + const SkOpPtT* ptT = &fPtT; + do { + if (!ptT->deleted()) { + ptT->debugSetCoinT(index); + } + ptT = ptT->next(); + } while (ptT != &fPtT); +#endif +} + +const SkOpSpan* SkOpSpanBase::debugStarter(SkOpSpanBase const** endPtr) const { + const SkOpSpanBase* end = *endPtr; + SkASSERT(this->segment() == end->segment()); + const SkOpSpanBase* result; + if (t() < end->t()) { + result = this; + } else { + result = end; + *endPtr = this; + } + return result->upCast(); +} + +void SkOpSpanBase::debugValidate() const { +#if DEBUG_COINCIDENCE + if (this->globalState()->debugCheckHealth()) { + return; + } +#endif +#if DEBUG_VALIDATE + const SkOpPtT* ptT = &fPtT; + SkASSERT(ptT->span() == this); + do { +// SkASSERT(SkDPoint::RoughlyEqual(fPtT.fPt, ptT->fPt)); + ptT->debugValidate(); + ptT = ptT->next(); + } while (ptT != &fPtT); + SkASSERT(this->debugCoinEndLoopCheck()); + if (!this->final()) { + SkASSERT(this->upCast()->debugCoinLoopCheck()); + } + if (fFromAngle) { + fFromAngle->debugValidate(); + } + if (!this->final() && this->upCast()->toAngle()) { + this->upCast()->toAngle()->debugValidate(); + } +#endif +} + +bool SkOpSpan::debugCoinLoopCheck() const { + int loop = 0; + const SkOpSpan* next = this; + SkOpSpan* nextCoin; + do { + nextCoin = next->fCoincident; + SkASSERT(nextCoin == this || nextCoin->fCoincident != nextCoin); + for (int check = 1; check < loop - 1; ++check) { + const SkOpSpan* checkCoin = this->fCoincident; + const SkOpSpan* innerCoin = checkCoin; + for (int inner = check + 1; inner < loop; ++inner) { + innerCoin = innerCoin->fCoincident; + if (checkCoin == innerCoin) { + SkDebugf("*** bad coincident loop ***\n"); + return false; + } + } + } + ++loop; + } while ((next = nextCoin) && next != this); + return true; +} + +#if DEBUG_COIN +// Commented-out lines keep this in sync with insertCoincidence() in header +void SkOpSpan::debugInsertCoincidence(SkPathOpsDebug::GlitchLog* log, const SkOpSpan* coin) const { + if (containsCoincidence(coin)) { +// SkASSERT(coin->containsCoincidence(this)); + return; + } + debugValidate(); +// SkASSERT(this != coin); + log->record(SkPathOpsDebug::kMarkCoinStart_Glitch, this, coin); +// coin->fCoincident = this->fCoincident; +// this->fCoincident = coinNext; + debugValidate(); +} + +// Commented-out lines keep this in sync with insertCoincidence() +void SkOpSpan::debugInsertCoincidence(SkPathOpsDebug::GlitchLog* log, const SkOpSegment* segment, bool flipped, bool ordered) const { + if (this->containsCoincidence(segment)) { + return; + } + const SkOpPtT* next = &fPtT; + while ((next = next->next()) != &fPtT) { + if (next->segment() == segment) { + const SkOpSpan* span; + const SkOpSpanBase* base = next->span(); + if (!ordered) { + const SkOpSpanBase* spanEnd = fNext->contains(segment)->span(); + const SkOpPtT* start = base->ptT()->starter(spanEnd->ptT()); + FAIL_IF_COIN(!start->span()->upCastable(), this); + span = const_cast(start->span()->upCast()); + } + else if (flipped) { + span = base->prev(); + FAIL_IF_COIN(!span, this); + } + else { + FAIL_IF_COIN(!base->upCastable(), this); + span = base->upCast(); + } + log->record(SkPathOpsDebug::kMarkCoinInsert_Glitch, span); + return; + } + } + log->record(SkPathOpsDebug::kMarkCoinMissing_Glitch, segment, this); + return; +} +#endif // DEBUG_COIN + +// called only by test code +int SkIntersections::debugCoincidentUsed() const { + if (!fIsCoincident[0]) { + SkASSERT(!fIsCoincident[1]); + return 0; + } + int count = 0; + SkDEBUGCODE(int count2 = 0;) + for (int index = 0; index < fUsed; ++index) { + if (fIsCoincident[0] & (1 << index)) { + ++count; + } +#ifdef SK_DEBUG + if (fIsCoincident[1] & (1 << index)) { + ++count2; + } +#endif + } + SkASSERT(count == count2); + return count; +} + +// Commented-out lines keep this in sync with addOpp() +void SkOpPtT::debugAddOpp(const SkOpPtT* opp, const SkOpPtT* oppPrev) const { + SkDEBUGCODE(const SkOpPtT* oldNext = this->fNext); + SkASSERT(this != opp); +// this->fNext = opp; + SkASSERT(oppPrev != oldNext); +// oppPrev->fNext = oldNext; +} + +bool SkOpPtT::debugContains(const SkOpPtT* check) const { + SkASSERT(this != check); + const SkOpPtT* ptT = this; + int links = 0; + do { + ptT = ptT->next(); + if (ptT == check) { + return true; + } + ++links; + const SkOpPtT* test = this; + for (int index = 0; index < links; ++index) { + if (ptT == test) { + return false; + } + test = test->next(); + } + } while (true); +} + +const SkOpPtT* SkOpPtT::debugContains(const SkOpSegment* check) const { + SkASSERT(this->segment() != check); + const SkOpPtT* ptT = this; + int links = 0; + do { + ptT = ptT->next(); + if (ptT->segment() == check) { + return ptT; + } + ++links; + const SkOpPtT* test = this; + for (int index = 0; index < links; ++index) { + if (ptT == test) { + return nullptr; + } + test = test->next(); + } + } while (true); +} + +const SkOpPtT* SkOpPtT::debugEnder(const SkOpPtT* end) const { + return fT < end->fT ? end : this; +} + +int SkOpPtT::debugLoopLimit(bool report) const { + int loop = 0; + const SkOpPtT* next = this; + do { + for (int check = 1; check < loop - 1; ++check) { + const SkOpPtT* checkPtT = this->fNext; + const SkOpPtT* innerPtT = checkPtT; + for (int inner = check + 1; inner < loop; ++inner) { + innerPtT = innerPtT->fNext; + if (checkPtT == innerPtT) { + if (report) { + SkDebugf("*** bad ptT loop ***\n"); + } + return loop; + } + } + } + // there's nothing wrong with extremely large loop counts -- but this may appear to hang + // by taking a very long time to figure out that no loop entry is a duplicate + // -- and it's likely that a large loop count is indicative of a bug somewhere + if (++loop > 1000) { + SkDebugf("*** loop count exceeds 1000 ***\n"); + return 1000; + } + } while ((next = next->fNext) && next != this); + return 0; +} + +const SkOpPtT* SkOpPtT::debugOppPrev(const SkOpPtT* opp) const { + return this->oppPrev(const_cast(opp)); +} + +void SkOpPtT::debugResetCoinT() const { +#if DEBUG_COINCIDENCE_ORDER + this->segment()->debugResetCoinT(); +#endif +} + +void SkOpPtT::debugSetCoinT(int index) const { +#if DEBUG_COINCIDENCE_ORDER + this->segment()->debugSetCoinT(index, fT); +#endif +} + +void SkOpPtT::debugValidate() const { +#if DEBUG_COINCIDENCE + if (this->globalState()->debugCheckHealth()) { + return; + } +#endif +#if DEBUG_VALIDATE + SkOpPhase phase = contour()->globalState()->phase(); + if (phase == SkOpPhase::kIntersecting || phase == SkOpPhase::kFixWinding) { + return; + } + SkASSERT(fNext); + SkASSERT(fNext != this); + SkASSERT(fNext->fNext); + SkASSERT(debugLoopLimit(false) == 0); +#endif +} + +static void output_scalar(SkScalar num) { + if (num == (int) num) { + SkDebugf("%d", (int) num); + } else { + SkString str; + str.printf("%1.9g", num); + int width = (int) str.size(); + const char* cStr = str.c_str(); + while (cStr[width - 1] == '0') { + --width; + } + str.resize(width); + SkDebugf("%sf", str.c_str()); + } +} + +static void output_points(const SkPoint* pts, int count) { + for (int index = 0; index < count; ++index) { + output_scalar(pts[index].fX); + SkDebugf(", "); + output_scalar(pts[index].fY); + if (index + 1 < count) { + SkDebugf(", "); + } + } +} + +static void showPathContours(const SkPath& path, const char* pathName) { + for (auto [verb, pts, w] : SkPathPriv::Iterate(path)) { + switch (verb) { + case SkPathVerb::kMove: + SkDebugf(" %s.moveTo(", pathName); + output_points(&pts[0], 1); + SkDebugf(");\n"); + continue; + case SkPathVerb::kLine: + SkDebugf(" %s.lineTo(", pathName); + output_points(&pts[1], 1); + SkDebugf(");\n"); + break; + case SkPathVerb::kQuad: + SkDebugf(" %s.quadTo(", pathName); + output_points(&pts[1], 2); + SkDebugf(");\n"); + break; + case SkPathVerb::kConic: + SkDebugf(" %s.conicTo(", pathName); + output_points(&pts[1], 2); + SkDebugf(", %1.9gf);\n", *w); + break; + case SkPathVerb::kCubic: + SkDebugf(" %s.cubicTo(", pathName); + output_points(&pts[1], 3); + SkDebugf(");\n"); + break; + case SkPathVerb::kClose: + SkDebugf(" %s.close();\n", pathName); + break; + default: + SkDEBUGFAIL("bad verb"); + return; + } + } +} + +static const char* gFillTypeStr[] = { + "kWinding", + "kEvenOdd", + "kInverseWinding", + "kInverseEvenOdd" +}; + +void SkPathOpsDebug::ShowOnePath(const SkPath& path, const char* name, bool includeDeclaration) { +#define SUPPORT_RECT_CONTOUR_DETECTION 0 +#if SUPPORT_RECT_CONTOUR_DETECTION + int rectCount = path.isRectContours() ? path.rectContours(nullptr, nullptr) : 0; + if (rectCount > 0) { + SkTDArray rects; + SkTDArray directions; + rects.setCount(rectCount); + directions.setCount(rectCount); + path.rectContours(rects.begin(), directions.begin()); + for (int contour = 0; contour < rectCount; ++contour) { + const SkRect& rect = rects[contour]; + SkDebugf("path.addRect(%1.9g, %1.9g, %1.9g, %1.9g, %s);\n", rect.fLeft, rect.fTop, + rect.fRight, rect.fBottom, directions[contour] == SkPathDirection::kCCW + ? "SkPathDirection::kCCW" : "SkPathDirection::kCW"); + } + return; + } +#endif + SkPathFillType fillType = path.getFillType(); + SkASSERT(fillType >= SkPathFillType::kWinding && fillType <= SkPathFillType::kInverseEvenOdd); + if (includeDeclaration) { + SkDebugf(" SkPath %s;\n", name); + } + SkDebugf(" %s.setFillType(SkPath::%s);\n", name, gFillTypeStr[(int)fillType]); + showPathContours(path, name); +} + +#if DEBUG_DUMP_VERIFY +#include "include/core/SkData.h" +#include "include/core/SkStream.h" + +static void dump_path(FILE* file, const SkPath& path, bool dumpAsHex) { + SkDynamicMemoryWStream wStream; + path.dump(&wStream, dumpAsHex); + sk_sp data(wStream.detachAsData()); + fprintf(file, "%.*s\n", (int) data->size(), (char*) data->data()); +} + +static int dumpID = 0; + +void DumpOp(const SkPath& one, const SkPath& two, SkPathOp op, + const char* testName) { + FILE* file = sk_fopen("op_dump.txt", kWrite_SkFILE_Flag); + DumpOp(file, one, two, op, testName); +} + +void DumpOp(FILE* file, const SkPath& one, const SkPath& two, SkPathOp op, + const char* testName) { + const char* name = testName ? testName : "op"; + fprintf(file, + "\nstatic void %s_%d(skiatest::Reporter* reporter, const char* filename) {\n", + name, ++dumpID); + fprintf(file, " SkPath path;\n"); + fprintf(file, " path.setFillType((SkPath::FillType) %d);\n", one.getFillType()); + dump_path(file, one, true); + fprintf(file, " SkPath path1(path);\n"); + fprintf(file, " path.reset();\n"); + fprintf(file, " path.setFillType((SkPath::FillType) %d);\n", two.getFillType()); + dump_path(file, two, true); + fprintf(file, " SkPath path2(path);\n"); + fprintf(file, " testPathOp(reporter, path1, path2, (SkPathOp) %d, filename);\n", op); + fprintf(file, "}\n\n"); + fclose(file); +} + +void DumpSimplify(const SkPath& path, const char* testName) { + FILE* file = sk_fopen("simplify_dump.txt", kWrite_SkFILE_Flag); + DumpSimplify(file, path, testName); +} + +void DumpSimplify(FILE* file, const SkPath& path, const char* testName) { + const char* name = testName ? testName : "simplify"; + fprintf(file, + "\nstatic void %s_%d(skiatest::Reporter* reporter, const char* filename) {\n", + name, ++dumpID); + fprintf(file, " SkPath path;\n"); + fprintf(file, " path.setFillType((SkPath::FillType) %d);\n", path.getFillType()); + dump_path(file, path, true); + fprintf(file, " testSimplify(reporter, path, filename);\n"); + fprintf(file, "}\n\n"); + fclose(file); +} + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkPaint.h" +#include "include/core/SkRegion.h" + +const int bitWidth = 64; +const int bitHeight = 64; + +static void debug_scale_matrix(const SkPath& one, const SkPath* two, SkMatrix& scale) { + SkRect larger = one.getBounds(); + if (two) { + larger.join(two->getBounds()); + } + SkScalar largerWidth = larger.width(); + if (largerWidth < 4) { + largerWidth = 4; + } + SkScalar largerHeight = larger.height(); + if (largerHeight < 4) { + largerHeight = 4; + } + SkScalar hScale = (bitWidth - 2) / largerWidth; + SkScalar vScale = (bitHeight - 2) / largerHeight; + scale.reset(); + scale.preScale(hScale, vScale); + larger.fLeft *= hScale; + larger.fRight *= hScale; + larger.fTop *= vScale; + larger.fBottom *= vScale; + SkScalar dx = -16000 > larger.fLeft ? -16000 - larger.fLeft + : 16000 < larger.fRight ? 16000 - larger.fRight : 0; + SkScalar dy = -16000 > larger.fTop ? -16000 - larger.fTop + : 16000 < larger.fBottom ? 16000 - larger.fBottom : 0; + scale.preTranslate(dx, dy); +} + +static int debug_paths_draw_the_same(const SkPath& one, const SkPath& two, SkBitmap& bits) { + if (bits.width() == 0) { + bits.allocN32Pixels(bitWidth * 2, bitHeight); + } + SkCanvas canvas(bits); + canvas.drawColor(SK_ColorWHITE); + SkPaint paint; + canvas.save(); + const SkRect& bounds1 = one.getBounds(); + canvas.translate(-bounds1.fLeft + 1, -bounds1.fTop + 1); + canvas.drawPath(one, paint); + canvas.restore(); + canvas.save(); + canvas.translate(-bounds1.fLeft + 1 + bitWidth, -bounds1.fTop + 1); + canvas.drawPath(two, paint); + canvas.restore(); + int errors = 0; + for (int y = 0; y < bitHeight - 1; ++y) { + uint32_t* addr1 = bits.getAddr32(0, y); + uint32_t* addr2 = bits.getAddr32(0, y + 1); + uint32_t* addr3 = bits.getAddr32(bitWidth, y); + uint32_t* addr4 = bits.getAddr32(bitWidth, y + 1); + for (int x = 0; x < bitWidth - 1; ++x) { + // count 2x2 blocks + bool err = addr1[x] != addr3[x]; + if (err) { + errors += addr1[x + 1] != addr3[x + 1] + && addr2[x] != addr4[x] && addr2[x + 1] != addr4[x + 1]; + } + } + } + return errors; +} + +void ReportOpFail(const SkPath& one, const SkPath& two, SkPathOp op) { + SkDebugf("// Op did not expect failure\n"); + DumpOp(stderr, one, two, op, "opTest"); + fflush(stderr); +} + +void VerifyOp(const SkPath& one, const SkPath& two, SkPathOp op, + const SkPath& result) { + SkPath pathOut, scaledPathOut; + SkRegion rgnA, rgnB, openClip, rgnOut; + openClip.setRect({-16000, -16000, 16000, 16000}); + rgnA.setPath(one, openClip); + rgnB.setPath(two, openClip); + rgnOut.op(rgnA, rgnB, (SkRegion::Op) op); + rgnOut.getBoundaryPath(&pathOut); + SkMatrix scale; + debug_scale_matrix(one, &two, scale); + SkRegion scaledRgnA, scaledRgnB, scaledRgnOut; + SkPath scaledA, scaledB; + scaledA.addPath(one, scale); + scaledA.setFillType(one.getFillType()); + scaledB.addPath(two, scale); + scaledB.setFillType(two.getFillType()); + scaledRgnA.setPath(scaledA, openClip); + scaledRgnB.setPath(scaledB, openClip); + scaledRgnOut.op(scaledRgnA, scaledRgnB, (SkRegion::Op) op); + scaledRgnOut.getBoundaryPath(&scaledPathOut); + SkBitmap bitmap; + SkPath scaledOut; + scaledOut.addPath(result, scale); + scaledOut.setFillType(result.getFillType()); + int errors = debug_paths_draw_the_same(scaledPathOut, scaledOut, bitmap); + const int MAX_ERRORS = 9; + if (errors > MAX_ERRORS) { + fprintf(stderr, "// Op did not expect errors=%d\n", errors); + DumpOp(stderr, one, two, op, "opTest"); + fflush(stderr); + } +} + +void ReportSimplifyFail(const SkPath& path) { + SkDebugf("// Simplify did not expect failure\n"); + DumpSimplify(stderr, path, "simplifyTest"); + fflush(stderr); +} + +void VerifySimplify(const SkPath& path, const SkPath& result) { + SkPath pathOut, scaledPathOut; + SkRegion rgnA, openClip, rgnOut; + openClip.setRect({-16000, -16000, 16000, 16000}); + rgnA.setPath(path, openClip); + rgnOut.getBoundaryPath(&pathOut); + SkMatrix scale; + debug_scale_matrix(path, nullptr, scale); + SkRegion scaledRgnA; + SkPath scaledA; + scaledA.addPath(path, scale); + scaledA.setFillType(path.getFillType()); + scaledRgnA.setPath(scaledA, openClip); + scaledRgnA.getBoundaryPath(&scaledPathOut); + SkBitmap bitmap; + SkPath scaledOut; + scaledOut.addPath(result, scale); + scaledOut.setFillType(result.getFillType()); + int errors = debug_paths_draw_the_same(scaledPathOut, scaledOut, bitmap); + const int MAX_ERRORS = 9; + if (errors > MAX_ERRORS) { + fprintf(stderr, "// Simplify did not expect errors=%d\n", errors); + DumpSimplify(stderr, path, "simplifyTest"); + fflush(stderr); + } +} +#endif // DEBUG_DUMP_VERIFY + +// global path dumps for msvs Visual Studio 17 to use from Immediate Window +void Dump(const SkPath& path) { + path.dump(); +} + +void DumpHex(const SkPath& path) { + path.dumpHex(); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsDebug.h b/gfx/skia/skia/src/pathops/SkPathOpsDebug.h new file mode 100644 index 0000000000..ef0a233d6c --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsDebug.h @@ -0,0 +1,453 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsDebug_DEFINED +#define SkPathOpsDebug_DEFINED + +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkTDArray.h" + +#include + +class SkOpAngle; +class SkOpCoincidence; +class SkOpContour; +class SkOpContourHead; +class SkOpPtT; +class SkOpSegment; +class SkOpSpan; +class SkOpSpanBase; +class SkPath; +struct SkDConic; +struct SkDCubic; +struct SkDLine; +struct SkDPoint; +struct SkDQuad; + +// define this when running fuzz +// #define SK_BUILD_FOR_FUZZER + +#ifdef SK_RELEASE +#define FORCE_RELEASE 1 +#else +#define FORCE_RELEASE 1 // set force release to 1 for multiple thread -- no debugging +#endif + +#define DEBUG_UNDER_DEVELOPMENT 0 + +#define ONE_OFF_DEBUG 0 +#define ONE_OFF_DEBUG_MATHEMATICA 0 + +#if defined(SK_BUILD_FOR_WIN) || defined(SK_BUILD_FOR_ANDROID) + #define SK_RAND(seed) rand() +#else + #define SK_RAND(seed) rand_r(&seed) +#endif + +#define WIND_AS_STRING(x) char x##Str[12]; \ + if (!SkPathOpsDebug::ValidWind(x)) strcpy(x##Str, "?"); \ + else snprintf(x##Str, sizeof(x##Str), "%d", x) + +#if FORCE_RELEASE + +#define DEBUG_ACTIVE_OP 0 +#define DEBUG_ACTIVE_SPANS 0 +#define DEBUG_ADD_INTERSECTING_TS 0 +#define DEBUG_ADD_T 0 +#define DEBUG_ALIGNMENT 0 +#define DEBUG_ANGLE 0 +#define DEBUG_ASSEMBLE 0 +#define DEBUG_COINCIDENCE 0 +#define DEBUG_COINCIDENCE_DUMP 0 // accumulate and dump which algorithms fired +#define DEBUG_COINCIDENCE_ORDER 0 // for well behaved curves, check if pairs match up in t-order +#define DEBUG_COINCIDENCE_VERBOSE 0 // usually whether the next function generates coincidence +#define DEBUG_CUBIC_BINARY_SEARCH 0 +#define DEBUG_CUBIC_SPLIT 0 +#define DEBUG_DUMP_SEGMENTS 0 +#define DEBUG_DUMP_VERIFY 0 +#define DEBUG_FLOW 0 +#define DEBUG_LIMIT_WIND_SUM 0 +#define DEBUG_MARK_DONE 0 +#define DEBUG_PATH_CONSTRUCTION 0 +#define DEBUG_PERP 0 +#define DEBUG_SORT 0 +#define DEBUG_T_SECT 0 +#define DEBUG_T_SECT_DUMP 0 +#define DEBUG_T_SECT_LOOP_COUNT 0 +#define DEBUG_VALIDATE 0 +#define DEBUG_WINDING 0 +#define DEBUG_WINDING_AT_T 0 + +#else + +#define DEBUG_ACTIVE_OP 1 +#define DEBUG_ACTIVE_SPANS 1 +#define DEBUG_ADD_INTERSECTING_TS 1 +#define DEBUG_ADD_T 1 +#define DEBUG_ALIGNMENT 0 +#define DEBUG_ANGLE 1 +#define DEBUG_ASSEMBLE 1 +#define DEBUG_COINCIDENCE 1 +#define DEBUG_COINCIDENCE_DUMP 1 +#define DEBUG_COINCIDENCE_ORDER 1 // tight arc quads may generate out-of-order coincidence spans +#define DEBUG_COINCIDENCE_VERBOSE 1 +#define DEBUG_CUBIC_BINARY_SEARCH 0 +#define DEBUG_CUBIC_SPLIT 1 +#define DEBUG_DUMP_VERIFY 1 +#define DEBUG_DUMP_SEGMENTS 1 +#define DEBUG_FLOW 1 +#define DEBUG_LIMIT_WIND_SUM 15 +#define DEBUG_MARK_DONE 1 +#define DEBUG_PATH_CONSTRUCTION 1 +#define DEBUG_PERP 1 +#define DEBUG_SORT 1 +#define DEBUG_T_SECT 0 // enabling may trigger validate asserts even though op does not fail +#define DEBUG_T_SECT_DUMP 0 // Use 1 normally. Use 2 to number segments, 3 for script output +#define DEBUG_T_SECT_LOOP_COUNT 0 +#define DEBUG_VALIDATE 1 +#define DEBUG_WINDING 1 +#define DEBUG_WINDING_AT_T 1 + +#endif + +#ifdef SK_RELEASE + #define SkDEBUGRELEASE(a, b) b + #define SkDEBUGPARAMS(...) +#else + #define SkDEBUGRELEASE(a, b) a + #define SkDEBUGPARAMS(...) , __VA_ARGS__ +#endif + +#if DEBUG_VALIDATE == 0 + #define PATH_OPS_DEBUG_VALIDATE_PARAMS(...) +#else + #define PATH_OPS_DEBUG_VALIDATE_PARAMS(...) , __VA_ARGS__ +#endif + +#if DEBUG_T_SECT == 0 + #define PATH_OPS_DEBUG_T_SECT_RELEASE(a, b) b + #define PATH_OPS_DEBUG_T_SECT_PARAMS(...) + #define PATH_OPS_DEBUG_T_SECT_CODE(...) +#else + #define PATH_OPS_DEBUG_T_SECT_RELEASE(a, b) a + #define PATH_OPS_DEBUG_T_SECT_PARAMS(...) , __VA_ARGS__ + #define PATH_OPS_DEBUG_T_SECT_CODE(...) __VA_ARGS__ +#endif + +#if DEBUG_T_SECT_DUMP > 1 + extern int gDumpTSectNum; +#endif + +#if DEBUG_COINCIDENCE || DEBUG_COINCIDENCE_DUMP + #define DEBUG_COIN 1 +#else + #define DEBUG_COIN 0 +#endif + +#if DEBUG_COIN +enum class SkOpPhase : char; + + #define DEBUG_COIN_DECLARE_ONLY_PARAMS() \ + int lineNo, SkOpPhase phase, int iteration + #define DEBUG_COIN_DECLARE_PARAMS() \ + , DEBUG_COIN_DECLARE_ONLY_PARAMS() + #define DEBUG_COIN_ONLY_PARAMS() \ + __LINE__, SkOpPhase::kNoChange, 0 + #define DEBUG_COIN_PARAMS() \ + , DEBUG_COIN_ONLY_PARAMS() + #define DEBUG_ITER_ONLY_PARAMS(iteration) \ + __LINE__, SkOpPhase::kNoChange, iteration + #define DEBUG_ITER_PARAMS(iteration) \ + , DEBUG_ITER_ONLY_PARAMS(iteration) + #define DEBUG_PHASE_ONLY_PARAMS(phase) \ + __LINE__, SkOpPhase::phase, 0 + #define DEBUG_PHASE_PARAMS(phase) \ + , DEBUG_PHASE_ONLY_PARAMS(phase) + #define DEBUG_SET_PHASE() \ + this->globalState()->debugSetPhase(__func__, lineNo, phase, iteration) + #define DEBUG_STATIC_SET_PHASE(obj) \ + obj->globalState()->debugSetPhase(__func__, lineNo, phase, iteration) +#elif DEBUG_VALIDATE + #define DEBUG_COIN_DECLARE_ONLY_PARAMS() \ + SkOpPhase phase + #define DEBUG_COIN_DECLARE_PARAMS() \ + , DEBUG_COIN_DECLARE_ONLY_PARAMS() + #define DEBUG_COIN_ONLY_PARAMS() \ + SkOpPhase::kNoChange + #define DEBUG_COIN_PARAMS() \ + , DEBUG_COIN_ONLY_PARAMS() + #define DEBUG_ITER_ONLY_PARAMS(iteration) \ + SkOpPhase::kNoChange + #define DEBUG_ITER_PARAMS(iteration) \ + , DEBUG_ITER_ONLY_PARAMS(iteration) + #define DEBUG_PHASE_ONLY_PARAMS(phase) \ + SkOpPhase::phase + #define DEBUG_PHASE_PARAMS(phase) \ + , DEBUG_PHASE_ONLY_PARAMS(phase) + #define DEBUG_SET_PHASE() \ + this->globalState()->debugSetPhase(phase) + #define DEBUG_STATIC_SET_PHASE(obj) \ + obj->globalState()->debugSetPhase(phase) +#else + #define DEBUG_COIN_DECLARE_ONLY_PARAMS() + #define DEBUG_COIN_DECLARE_PARAMS() + #define DEBUG_COIN_ONLY_PARAMS() + #define DEBUG_COIN_PARAMS() + #define DEBUG_ITER_ONLY_PARAMS(iteration) + #define DEBUG_ITER_PARAMS(iteration) + #define DEBUG_PHASE_ONLY_PARAMS(phase) + #define DEBUG_PHASE_PARAMS(phase) + #define DEBUG_SET_PHASE() + #define DEBUG_STATIC_SET_PHASE(obj) +#endif + +#define CUBIC_DEBUG_STR "{{{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}}}" +#define CONIC_DEBUG_STR "{{{{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}}}, %1.9g}" +#define QUAD_DEBUG_STR "{{{%1.9g,%1.9g}, {%1.9g,%1.9g}, {%1.9g,%1.9g}}}" +#define LINE_DEBUG_STR "{{{%1.9g,%1.9g}, {%1.9g,%1.9g}}}" +#define PT_DEBUG_STR "{{%1.9g,%1.9g}}" + +#define T_DEBUG_STR(t, n) #t "[" #n "]=%1.9g" +#define TX_DEBUG_STR(t) #t "[%d]=%1.9g" +#define CUBIC_DEBUG_DATA(c) c[0].fX, c[0].fY, c[1].fX, c[1].fY, c[2].fX, c[2].fY, c[3].fX, c[3].fY +#define CONIC_DEBUG_DATA(c, w) c[0].fX, c[0].fY, c[1].fX, c[1].fY, c[2].fX, c[2].fY, w +#define QUAD_DEBUG_DATA(q) q[0].fX, q[0].fY, q[1].fX, q[1].fY, q[2].fX, q[2].fY +#define LINE_DEBUG_DATA(l) l[0].fX, l[0].fY, l[1].fX, l[1].fY +#define PT_DEBUG_DATA(i, n) i.pt(n).asSkPoint().fX, i.pt(n).asSkPoint().fY + +#ifndef DEBUG_TEST +#define DEBUG_TEST 0 +#endif + +// Tests with extreme numbers may fail, but all other tests should never fail. +#define FAIL_IF(cond) \ + do { bool fail = (cond); SkOPASSERT(!fail); if (fail) return false; } while (false) + +#define FAIL_WITH_NULL_IF(cond) \ + do { bool fail = (cond); SkOPASSERT(!fail); if (fail) return nullptr; } while (false) + +class SkPathOpsDebug { +public: +#if DEBUG_COIN + struct GlitchLog; + + enum GlitchType { + kUninitialized_Glitch, + kAddCorruptCoin_Glitch, + kAddExpandedCoin_Glitch, + kAddExpandedFail_Glitch, + kAddIfCollapsed_Glitch, + kAddIfMissingCoin_Glitch, + kAddMissingCoin_Glitch, + kAddMissingExtend_Glitch, + kAddOrOverlap_Glitch, + kCollapsedCoin_Glitch, + kCollapsedDone_Glitch, + kCollapsedOppValue_Glitch, + kCollapsedSpan_Glitch, + kCollapsedWindValue_Glitch, + kCorrectEnd_Glitch, + kDeletedCoin_Glitch, + kExpandCoin_Glitch, + kFail_Glitch, + kMarkCoinEnd_Glitch, + kMarkCoinInsert_Glitch, + kMarkCoinMissing_Glitch, + kMarkCoinStart_Glitch, + kMergeMatches_Glitch, + kMissingCoin_Glitch, + kMissingDone_Glitch, + kMissingIntersection_Glitch, + kMoveMultiple_Glitch, + kMoveNearbyClearAll_Glitch, + kMoveNearbyClearAll2_Glitch, + kMoveNearbyMerge_Glitch, + kMoveNearbyMergeFinal_Glitch, + kMoveNearbyRelease_Glitch, + kMoveNearbyReleaseFinal_Glitch, + kReleasedSpan_Glitch, + kReturnFalse_Glitch, + kUnaligned_Glitch, + kUnalignedHead_Glitch, + kUnalignedTail_Glitch, + }; + + struct CoinDictEntry { + int fIteration; + int fLineNumber; + GlitchType fGlitchType; + const char* fFunctionName; + }; + + struct CoinDict { + void add(const CoinDictEntry& key); + void add(const CoinDict& dict); + void dump(const char* str, bool visitCheck) const; + SkTDArray fDict; + }; + + static CoinDict gCoinSumChangedDict; + static CoinDict gCoinSumVisitedDict; + static CoinDict gCoinVistedDict; +#endif + +#if defined(SK_DEBUG) || !FORCE_RELEASE + static int gContourID; + static int gSegmentID; +#endif + +#if DEBUG_SORT + static int gSortCountDefault; + static int gSortCount; +#endif + +#if DEBUG_ACTIVE_OP + static const char* kPathOpStr[]; +#endif + static bool gRunFail; + static bool gVeryVerbose; + +#if DEBUG_ACTIVE_SPANS + static SkString gActiveSpans; +#endif +#if DEBUG_DUMP_VERIFY + static bool gDumpOp; + static bool gVerifyOp; +#endif + + static const char* OpStr(SkPathOp ); + static void MathematicaIze(char* str, size_t bufferSize); + static bool ValidWind(int winding); + static void WindingPrintf(int winding); + + static void ShowActiveSpans(SkOpContourHead* contourList); + static void ShowOnePath(const SkPath& path, const char* name, bool includeDeclaration); + static void ShowPath(const SkPath& one, const SkPath& two, SkPathOp op, const char* name); + + static bool ChaseContains(const SkTDArray& , const SkOpSpanBase* ); + + static void CheckHealth(class SkOpContourHead* contourList); + +#if DEBUG_COIN + static void DumpCoinDict(); + static void DumpGlitchType(GlitchType ); +#endif + +}; + +// Visual Studio 2017 does not permit calling member functions from the Immediate Window. +// Global functions work fine, however. Use globals rather than static members inside a class. +const SkOpAngle* AngleAngle(const SkOpAngle*, int id); +SkOpContour* AngleContour(SkOpAngle*, int id); +const SkOpPtT* AnglePtT(const SkOpAngle*, int id); +const SkOpSegment* AngleSegment(const SkOpAngle*, int id); +const SkOpSpanBase* AngleSpan(const SkOpAngle*, int id); + +const SkOpAngle* ContourAngle(SkOpContour*, int id); +SkOpContour* ContourContour(SkOpContour*, int id); +const SkOpPtT* ContourPtT(SkOpContour*, int id); +const SkOpSegment* ContourSegment(SkOpContour*, int id); +const SkOpSpanBase* ContourSpan(SkOpContour*, int id); + +const SkOpAngle* CoincidenceAngle(SkOpCoincidence*, int id); +SkOpContour* CoincidenceContour(SkOpCoincidence*, int id); +const SkOpPtT* CoincidencePtT(SkOpCoincidence*, int id); +const SkOpSegment* CoincidenceSegment(SkOpCoincidence*, int id); +const SkOpSpanBase* CoincidenceSpan(SkOpCoincidence*, int id); + +const SkOpAngle* PtTAngle(const SkOpPtT*, int id); +SkOpContour* PtTContour(SkOpPtT*, int id); +const SkOpPtT* PtTPtT(const SkOpPtT*, int id); +const SkOpSegment* PtTSegment(const SkOpPtT*, int id); +const SkOpSpanBase* PtTSpan(const SkOpPtT*, int id); + +const SkOpAngle* SegmentAngle(const SkOpSegment*, int id); +SkOpContour* SegmentContour(SkOpSegment*, int id); +const SkOpPtT* SegmentPtT(const SkOpSegment*, int id); +const SkOpSegment* SegmentSegment(const SkOpSegment*, int id); +const SkOpSpanBase* SegmentSpan(const SkOpSegment*, int id); + +const SkOpAngle* SpanAngle(const SkOpSpanBase*, int id); +SkOpContour* SpanContour(SkOpSpanBase*, int id); +const SkOpPtT* SpanPtT(const SkOpSpanBase*, int id); +const SkOpSegment* SpanSegment(const SkOpSpanBase*, int id); +const SkOpSpanBase* SpanSpan(const SkOpSpanBase*, int id); + +#if DEBUG_DUMP_VERIFY +void DumpOp(const SkPath& one, const SkPath& two, SkPathOp op, + const char* testName); +void DumpOp(FILE* file, const SkPath& one, const SkPath& two, SkPathOp op, + const char* testName); +void DumpSimplify(const SkPath& path, const char* testName); +void DumpSimplify(FILE* file, const SkPath& path, const char* testName); +void ReportOpFail(const SkPath& one, const SkPath& two, SkPathOp op); +void ReportSimplifyFail(const SkPath& path); +void VerifyOp(const SkPath& one, const SkPath& two, SkPathOp op, + const SkPath& result); +void VerifySimplify(const SkPath& path, const SkPath& result); +#endif + +// global path dumps for msvs Visual Studio 17 to use from Immediate Window +void Dump(const SkOpContour& ); +void DumpAll(const SkOpContour& ); +void DumpAngles(const SkOpContour& ); +void DumpContours(const SkOpContour& ); +void DumpContoursAll(const SkOpContour& ); +void DumpContoursAngles(const SkOpContour& ); +void DumpContoursPts(const SkOpContour& ); +void DumpContoursPt(const SkOpContour& , int segmentID); +void DumpContoursSegment(const SkOpContour& , int segmentID); +void DumpContoursSpan(const SkOpContour& , int segmentID); +void DumpContoursSpans(const SkOpContour& ); +void DumpPt(const SkOpContour& , int ); +void DumpPts(const SkOpContour& , const char* prefix = "seg"); +void DumpSegment(const SkOpContour& , int ); +void DumpSegments(const SkOpContour& , const char* prefix = "seg", SkPathOp op = (SkPathOp) -1); +void DumpSpan(const SkOpContour& , int ); +void DumpSpans(const SkOpContour& ); + +void Dump(const SkOpSegment& ); +void DumpAll(const SkOpSegment& ); +void DumpAngles(const SkOpSegment& ); +void DumpCoin(const SkOpSegment& ); +void DumpPts(const SkOpSegment& , const char* prefix = "seg"); + +void Dump(const SkOpPtT& ); +void DumpAll(const SkOpPtT& ); + +void Dump(const SkOpSpanBase& ); +void DumpCoin(const SkOpSpanBase& ); +void DumpAll(const SkOpSpanBase& ); + +void DumpCoin(const SkOpSpan& ); +bool DumpSpan(const SkOpSpan& ); + +void Dump(const SkDConic& ); +void DumpID(const SkDConic& , int id); + +void Dump(const SkDCubic& ); +void DumpID(const SkDCubic& , int id); + +void Dump(const SkDLine& ); +void DumpID(const SkDLine& , int id); + +void Dump(const SkDQuad& ); +void DumpID(const SkDQuad& , int id); + +void Dump(const SkDPoint& ); + +void Dump(const SkOpAngle& ); + +// generates tools/path_sorter.htm and path_visualizer.htm compatible data +void DumpQ(const SkDQuad& quad1, const SkDQuad& quad2, int testNo); +void DumpT(const SkDQuad& quad, double t); + +// global path dumps for msvs Visual Studio 17 to use from Immediate Window +void Dump(const SkPath& path); +void DumpHex(const SkPath& path); + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsLine.cpp b/gfx/skia/skia/src/pathops/SkPathOpsLine.cpp new file mode 100644 index 0000000000..253f95b770 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsLine.cpp @@ -0,0 +1,154 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsLine.h" + +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +SkDPoint SkDLine::ptAtT(double t) const { + if (0 == t) { + return fPts[0]; + } + if (1 == t) { + return fPts[1]; + } + double one_t = 1 - t; + SkDPoint result = { one_t * fPts[0].fX + t * fPts[1].fX, one_t * fPts[0].fY + t * fPts[1].fY }; + return result; +} + +double SkDLine::exactPoint(const SkDPoint& xy) const { + if (xy == fPts[0]) { // do cheapest test first + return 0; + } + if (xy == fPts[1]) { + return 1; + } + return -1; +} + +double SkDLine::nearPoint(const SkDPoint& xy, bool* unequal) const { + if (!AlmostBetweenUlps(fPts[0].fX, xy.fX, fPts[1].fX) + || !AlmostBetweenUlps(fPts[0].fY, xy.fY, fPts[1].fY)) { + return -1; + } + // project a perpendicular ray from the point to the line; find the T on the line + SkDVector len = fPts[1] - fPts[0]; // the x/y magnitudes of the line + double denom = len.fX * len.fX + len.fY * len.fY; // see DLine intersectRay + SkDVector ab0 = xy - fPts[0]; + double numer = len.fX * ab0.fX + ab0.fY * len.fY; + if (!between(0, numer, denom)) { + return -1; + } + if (!denom) { + return 0; + } + double t = numer / denom; + SkDPoint realPt = ptAtT(t); + double dist = realPt.distance(xy); // OPTIMIZATION: can we compare against distSq instead ? + // find the ordinal in the original line with the largest unsigned exponent + double tiniest = std::min(std::min(std::min(fPts[0].fX, fPts[0].fY), fPts[1].fX), fPts[1].fY); + double largest = std::max(std::max(std::max(fPts[0].fX, fPts[0].fY), fPts[1].fX), fPts[1].fY); + largest = std::max(largest, -tiniest); + if (!AlmostEqualUlps_Pin(largest, largest + dist)) { // is the dist within ULPS tolerance? + return -1; + } + if (unequal) { + *unequal = (float) largest != (float) (largest + dist); + } + t = SkPinT(t); // a looser pin breaks skpwww_lptemp_com_3 + SkASSERT(between(0, t, 1)); + return t; +} + +bool SkDLine::nearRay(const SkDPoint& xy) const { + // project a perpendicular ray from the point to the line; find the T on the line + SkDVector len = fPts[1] - fPts[0]; // the x/y magnitudes of the line + double denom = len.fX * len.fX + len.fY * len.fY; // see DLine intersectRay + SkDVector ab0 = xy - fPts[0]; + double numer = len.fX * ab0.fX + ab0.fY * len.fY; + double t = numer / denom; + SkDPoint realPt = ptAtT(t); + double dist = realPt.distance(xy); // OPTIMIZATION: can we compare against distSq instead ? + // find the ordinal in the original line with the largest unsigned exponent + double tiniest = std::min(std::min(std::min(fPts[0].fX, fPts[0].fY), fPts[1].fX), fPts[1].fY); + double largest = std::max(std::max(std::max(fPts[0].fX, fPts[0].fY), fPts[1].fX), fPts[1].fY); + largest = std::max(largest, -tiniest); + return RoughlyEqualUlps(largest, largest + dist); // is the dist within ULPS tolerance? +} + +double SkDLine::ExactPointH(const SkDPoint& xy, double left, double right, double y) { + if (xy.fY == y) { + if (xy.fX == left) { + return 0; + } + if (xy.fX == right) { + return 1; + } + } + return -1; +} + +double SkDLine::NearPointH(const SkDPoint& xy, double left, double right, double y) { + if (!AlmostBequalUlps(xy.fY, y)) { + return -1; + } + if (!AlmostBetweenUlps(left, xy.fX, right)) { + return -1; + } + double t = (xy.fX - left) / (right - left); + t = SkPinT(t); + SkASSERT(between(0, t, 1)); + double realPtX = (1 - t) * left + t * right; + SkDVector distU = {xy.fY - y, xy.fX - realPtX}; + double distSq = distU.fX * distU.fX + distU.fY * distU.fY; + double dist = sqrt(distSq); // OPTIMIZATION: can we compare against distSq instead ? + double tiniest = std::min(std::min(y, left), right); + double largest = std::max(std::max(y, left), right); + largest = std::max(largest, -tiniest); + if (!AlmostEqualUlps(largest, largest + dist)) { // is the dist within ULPS tolerance? + return -1; + } + return t; +} + +double SkDLine::ExactPointV(const SkDPoint& xy, double top, double bottom, double x) { + if (xy.fX == x) { + if (xy.fY == top) { + return 0; + } + if (xy.fY == bottom) { + return 1; + } + } + return -1; +} + +double SkDLine::NearPointV(const SkDPoint& xy, double top, double bottom, double x) { + if (!AlmostBequalUlps(xy.fX, x)) { + return -1; + } + if (!AlmostBetweenUlps(top, xy.fY, bottom)) { + return -1; + } + double t = (xy.fY - top) / (bottom - top); + t = SkPinT(t); + SkASSERT(between(0, t, 1)); + double realPtY = (1 - t) * top + t * bottom; + SkDVector distU = {xy.fX - x, xy.fY - realPtY}; + double distSq = distU.fX * distU.fX + distU.fY * distU.fY; + double dist = sqrt(distSq); // OPTIMIZATION: can we compare against distSq instead ? + double tiniest = std::min(std::min(x, top), bottom); + double largest = std::max(std::max(x, top), bottom); + largest = std::max(largest, -tiniest); + if (!AlmostEqualUlps(largest, largest + dist)) { // is the dist within ULPS tolerance? + return -1; + } + return t; +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsLine.h b/gfx/skia/skia/src/pathops/SkPathOpsLine.h new file mode 100644 index 0000000000..ff5354d3ae --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsLine.h @@ -0,0 +1,41 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsLine_DEFINED +#define SkPathOpsLine_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "src/pathops/SkPathOpsPoint.h" + +struct SkDLine { + SkDPoint fPts[2]; + + const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < 2); return fPts[n]; } + SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < 2); return fPts[n]; } + + const SkDLine& set(const SkPoint pts[2]) { + fPts[0] = pts[0]; + fPts[1] = pts[1]; + return *this; + } + + double exactPoint(const SkDPoint& xy) const; + static double ExactPointH(const SkDPoint& xy, double left, double right, double y); + static double ExactPointV(const SkDPoint& xy, double top, double bottom, double x); + + double nearPoint(const SkDPoint& xy, bool* unequal) const; + bool nearRay(const SkDPoint& xy) const; + static double NearPointH(const SkDPoint& xy, double left, double right, double y); + static double NearPointV(const SkDPoint& xy, double top, double bottom, double x); + SkDPoint ptAtT(double t) const; + + void dump() const; + void dumpID(int ) const; + void dumpInner() const; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsOp.cpp b/gfx/skia/skia/src/pathops/SkPathOpsOp.cpp new file mode 100644 index 0000000000..ad7665fe70 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsOp.cpp @@ -0,0 +1,395 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPath.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkRect.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTDArray.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkAddIntersections.h" +#include "src/pathops/SkOpAngle.h" +#include "src/pathops/SkOpCoincidence.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpEdgeBuilder.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsCommon.h" +#include "src/pathops/SkPathOpsTypes.h" +#include "src/pathops/SkPathWriter.h" + +#include + +static bool findChaseOp(SkTDArray& chase, SkOpSpanBase** startPtr, + SkOpSpanBase** endPtr, SkOpSegment** result) { + while (!chase.empty()) { + SkOpSpanBase* span = chase.back(); + chase.pop_back(); + // OPTIMIZE: prev makes this compatible with old code -- but is it necessary? + *startPtr = span->ptT()->prev()->span(); + SkOpSegment* segment = (*startPtr)->segment(); + bool done = true; + *endPtr = nullptr; + if (SkOpAngle* last = segment->activeAngle(*startPtr, startPtr, endPtr, &done)) { + *startPtr = last->start(); + *endPtr = last->end(); + #if TRY_ROTATE + *chase.insert(0) = span; + #else + *chase.append() = span; + #endif + *result = last->segment(); + return true; + } + if (done) { + continue; + } + int winding; + bool sortable; + const SkOpAngle* angle = AngleWinding(*startPtr, *endPtr, &winding, &sortable); + if (!angle) { + *result = nullptr; + return true; + } + if (winding == SK_MinS32) { + continue; + } + int sumMiWinding, sumSuWinding; + if (sortable) { + segment = angle->segment(); + sumMiWinding = segment->updateWindingReverse(angle); + if (sumMiWinding == SK_MinS32) { + SkASSERT(segment->globalState()->debugSkipAssert()); + *result = nullptr; + return true; + } + sumSuWinding = segment->updateOppWindingReverse(angle); + if (sumSuWinding == SK_MinS32) { + SkASSERT(segment->globalState()->debugSkipAssert()); + *result = nullptr; + return true; + } + if (segment->operand()) { + using std::swap; + swap(sumMiWinding, sumSuWinding); + } + } + SkOpSegment* first = nullptr; + const SkOpAngle* firstAngle = angle; + while ((angle = angle->next()) != firstAngle) { + segment = angle->segment(); + SkOpSpanBase* start = angle->start(); + SkOpSpanBase* end = angle->end(); + int maxWinding = 0, sumWinding = 0, oppMaxWinding = 0, oppSumWinding = 0; + if (sortable) { + segment->setUpWindings(start, end, &sumMiWinding, &sumSuWinding, + &maxWinding, &sumWinding, &oppMaxWinding, &oppSumWinding); + } + if (!segment->done(angle)) { + if (!first && (sortable || start->starter(end)->windSum() != SK_MinS32)) { + first = segment; + *startPtr = start; + *endPtr = end; + } + // OPTIMIZATION: should this also add to the chase? + if (sortable) { + if (!segment->markAngle(maxWinding, sumWinding, oppMaxWinding, + oppSumWinding, angle, nullptr)) { + return false; + } + } + } + } + if (first) { + #if TRY_ROTATE + *chase.insert(0) = span; + #else + *chase.append() = span; + #endif + *result = first; + return true; + } + } + *result = nullptr; + return true; +} + +static bool bridgeOp(SkOpContourHead* contourList, const SkPathOp op, + const int xorMask, const int xorOpMask, SkPathWriter* writer) { + bool unsortable = false; + bool lastSimple = false; + bool simple = false; + do { + SkOpSpan* span = FindSortableTop(contourList); + if (!span) { + break; + } + SkOpSegment* current = span->segment(); + SkOpSpanBase* start = span->next(); + SkOpSpanBase* end = span; + SkTDArray chase; + do { + if (current->activeOp(start, end, xorMask, xorOpMask, op)) { + do { + if (!unsortable && current->done()) { + break; + } + SkASSERT(unsortable || !current->done()); + SkOpSpanBase* nextStart = start; + SkOpSpanBase* nextEnd = end; + lastSimple = simple; + SkOpSegment* next = current->findNextOp(&chase, &nextStart, &nextEnd, + &unsortable, &simple, op, xorMask, xorOpMask); + if (!next) { + if (!unsortable && writer->hasMove() + && current->verb() != SkPath::kLine_Verb + && !writer->isClosed()) { + if (!current->addCurveTo(start, end, writer)) { + return false; + } + if (!writer->isClosed()) { + SkPathOpsDebug::ShowActiveSpans(contourList); + } + } else if (lastSimple) { + if (!current->addCurveTo(start, end, writer)) { + return false; + } + } + break; + } + #if DEBUG_FLOW + SkDebugf("%s current id=%d from=(%1.9g,%1.9g) to=(%1.9g,%1.9g)\n", __FUNCTION__, + current->debugID(), start->pt().fX, start->pt().fY, + end->pt().fX, end->pt().fY); + #endif + if (!current->addCurveTo(start, end, writer)) { + return false; + } + current = next; + start = nextStart; + end = nextEnd; + } while (!writer->isClosed() && (!unsortable || !start->starter(end)->done())); + if (current->activeWinding(start, end) && !writer->isClosed()) { + SkOpSpan* spanStart = start->starter(end); + if (!spanStart->done()) { + if (!current->addCurveTo(start, end, writer)) { + return false; + } + current->markDone(spanStart); + } + } + writer->finishContour(); + } else { + SkOpSpanBase* last; + if (!current->markAndChaseDone(start, end, &last)) { + return false; + } + if (last && !last->chased()) { + last->setChased(true); + SkASSERT(!SkPathOpsDebug::ChaseContains(chase, last)); + *chase.append() = last; +#if DEBUG_WINDING + SkDebugf("%s chase.append id=%d", __FUNCTION__, last->segment()->debugID()); + if (!last->final()) { + SkDebugf(" windSum=%d", last->upCast()->windSum()); + } + SkDebugf("\n"); +#endif + } + } + if (!findChaseOp(chase, &start, &end, ¤t)) { + return false; + } + SkPathOpsDebug::ShowActiveSpans(contourList); + if (!current) { + break; + } + } while (true); + } while (true); + return true; +} + +// diagram of why this simplifcation is possible is here: +// https://skia.org/dev/present/pathops link at bottom of the page +// https://drive.google.com/file/d/0BwoLUwz9PYkHLWpsaXd0UDdaN00/view?usp=sharing +static const SkPathOp gOpInverse[kReverseDifference_SkPathOp + 1][2][2] = { +// inside minuend outside minuend +// inside subtrahend outside subtrahend inside subtrahend outside subtrahend +{{ kDifference_SkPathOp, kIntersect_SkPathOp }, { kUnion_SkPathOp, kReverseDifference_SkPathOp }}, +{{ kIntersect_SkPathOp, kDifference_SkPathOp }, { kReverseDifference_SkPathOp, kUnion_SkPathOp }}, +{{ kUnion_SkPathOp, kReverseDifference_SkPathOp }, { kDifference_SkPathOp, kIntersect_SkPathOp }}, +{{ kXOR_SkPathOp, kXOR_SkPathOp }, { kXOR_SkPathOp, kXOR_SkPathOp }}, +{{ kReverseDifference_SkPathOp, kUnion_SkPathOp }, { kIntersect_SkPathOp, kDifference_SkPathOp }}, +}; + +static const bool gOutInverse[kReverseDifference_SkPathOp + 1][2][2] = { + {{ false, false }, { true, false }}, // diff + {{ false, false }, { false, true }}, // sect + {{ false, true }, { true, true }}, // union + {{ false, true }, { true, false }}, // xor + {{ false, true }, { false, false }}, // rev diff +}; + +#if DEBUG_T_SECT_LOOP_COUNT + +#include "include/private/base/SkMutex.h" + +SkOpGlobalState debugWorstState(nullptr, nullptr SkDEBUGPARAMS(false) SkDEBUGPARAMS(nullptr)); + +void ReportPathOpsDebugging() { + debugWorstState.debugLoopReport(); +} + +extern void (*gVerboseFinalize)(); + +#endif + +bool OpDebug(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result + SkDEBUGPARAMS(bool skipAssert) SkDEBUGPARAMS(const char* testName)) { +#if DEBUG_DUMP_VERIFY +#ifndef SK_DEBUG + const char* testName = "release"; +#endif + if (SkPathOpsDebug::gDumpOp) { + DumpOp(one, two, op, testName); + } +#endif + op = gOpInverse[op][one.isInverseFillType()][two.isInverseFillType()]; + bool inverseFill = gOutInverse[op][one.isInverseFillType()][two.isInverseFillType()]; + SkPathFillType fillType = inverseFill ? SkPathFillType::kInverseEvenOdd : + SkPathFillType::kEvenOdd; + SkRect rect1, rect2; + if (kIntersect_SkPathOp == op && one.isRect(&rect1) && two.isRect(&rect2)) { + result->reset(); + result->setFillType(fillType); + if (rect1.intersect(rect2)) { + result->addRect(rect1); + } + return true; + } + if (one.isEmpty() || two.isEmpty()) { + SkPath work; + switch (op) { + case kIntersect_SkPathOp: + break; + case kUnion_SkPathOp: + case kXOR_SkPathOp: + work = one.isEmpty() ? two : one; + break; + case kDifference_SkPathOp: + if (!one.isEmpty()) { + work = one; + } + break; + case kReverseDifference_SkPathOp: + if (!two.isEmpty()) { + work = two; + } + break; + default: + SkASSERT(0); // unhandled case + } + if (inverseFill != work.isInverseFillType()) { + work.toggleInverseFillType(); + } + return Simplify(work, result); + } + SkSTArenaAlloc<4096> allocator; // FIXME: add a constant expression here, tune + SkOpContour contour; + SkOpContourHead* contourList = static_cast(&contour); + SkOpGlobalState globalState(contourList, &allocator + SkDEBUGPARAMS(skipAssert) SkDEBUGPARAMS(testName)); + SkOpCoincidence coincidence(&globalState); + const SkPath* minuend = &one; + const SkPath* subtrahend = &two; + if (op == kReverseDifference_SkPathOp) { + using std::swap; + swap(minuend, subtrahend); + op = kDifference_SkPathOp; + } +#if DEBUG_SORT + SkPathOpsDebug::gSortCount = SkPathOpsDebug::gSortCountDefault; +#endif + // turn path into list of segments + SkOpEdgeBuilder builder(*minuend, contourList, &globalState); + if (builder.unparseable()) { + return false; + } + const int xorMask = builder.xorMask(); + builder.addOperand(*subtrahend); + if (!builder.finish()) { + return false; + } +#if DEBUG_DUMP_SEGMENTS + contourList->dumpSegments("seg", op); +#endif + + const int xorOpMask = builder.xorMask(); + if (!SortContourList(&contourList, xorMask == kEvenOdd_PathOpsMask, + xorOpMask == kEvenOdd_PathOpsMask)) { + result->reset(); + result->setFillType(fillType); + return true; + } + // find all intersections between segments + SkOpContour* current = contourList; + do { + SkOpContour* next = current; + while (AddIntersectTs(current, next, &coincidence) + && (next = next->next())) + ; + } while ((current = current->next())); +#if DEBUG_VALIDATE + globalState.setPhase(SkOpPhase::kWalking); +#endif + bool success = HandleCoincidence(contourList, &coincidence); +#if DEBUG_COIN + globalState.debugAddToGlobalCoinDicts(); +#endif + if (!success) { + return false; + } +#if DEBUG_ALIGNMENT + contourList->dumpSegments("aligned"); +#endif + // construct closed contours + SkPath original = *result; + result->reset(); + result->setFillType(fillType); + SkPathWriter wrapper(*result); + if (!bridgeOp(contourList, op, xorMask, xorOpMask, &wrapper)) { + *result = original; + return false; + } + wrapper.assemble(); // if some edges could not be resolved, assemble remaining +#if DEBUG_T_SECT_LOOP_COUNT + static SkMutex& debugWorstLoop = *(new SkMutex); + { + SkAutoMutexExclusive autoM(debugWorstLoop); + if (!gVerboseFinalize) { + gVerboseFinalize = &ReportPathOpsDebugging; + } + debugWorstState.debugDoYourWorst(&globalState); + } +#endif + return true; +} + +bool Op(const SkPath& one, const SkPath& two, SkPathOp op, SkPath* result) { +#if DEBUG_DUMP_VERIFY + if (SkPathOpsDebug::gVerifyOp) { + if (!OpDebug(one, two, op, result SkDEBUGPARAMS(false) SkDEBUGPARAMS(nullptr))) { + ReportOpFail(one, two, op); + return false; + } + VerifyOp(one, two, op, *result); + return true; + } +#endif + return OpDebug(one, two, op, result SkDEBUGPARAMS(true) SkDEBUGPARAMS(nullptr)); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsPoint.h b/gfx/skia/skia/src/pathops/SkPathOpsPoint.h new file mode 100644 index 0000000000..9d70df0870 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsPoint.h @@ -0,0 +1,281 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsPoint_DEFINED +#define SkPathOpsPoint_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTemplates.h" +#include "src/pathops/SkPathOpsTypes.h" + +inline bool AlmostEqualUlps(const SkPoint& pt1, const SkPoint& pt2) { + return AlmostEqualUlps(pt1.fX, pt2.fX) && AlmostEqualUlps(pt1.fY, pt2.fY); +} + +struct SkDVector { + double fX; + double fY; + + SkDVector& set(const SkVector& pt) { + fX = pt.fX; + fY = pt.fY; + return *this; + } + + // only used by testing + void operator+=(const SkDVector& v) { + fX += v.fX; + fY += v.fY; + } + + // only called by nearestT, which is currently only used by testing + void operator-=(const SkDVector& v) { + fX -= v.fX; + fY -= v.fY; + } + + // only used by testing + void operator/=(const double s) { + fX /= s; + fY /= s; + } + + // only used by testing + void operator*=(const double s) { + fX *= s; + fY *= s; + } + + SkVector asSkVector() const { + SkVector v = {SkDoubleToScalar(fX), SkDoubleToScalar(fY)}; + return v; + } + + // only used by testing + double cross(const SkDVector& a) const { + return fX * a.fY - fY * a.fX; + } + + // similar to cross, this bastardization considers nearly coincident to be zero + // uses ulps epsilon == 16 + double crossCheck(const SkDVector& a) const { + double xy = fX * a.fY; + double yx = fY * a.fX; + return AlmostEqualUlps(xy, yx) ? 0 : xy - yx; + } + + // allow tinier numbers + double crossNoNormalCheck(const SkDVector& a) const { + double xy = fX * a.fY; + double yx = fY * a.fX; + return AlmostEqualUlpsNoNormalCheck(xy, yx) ? 0 : xy - yx; + } + + double dot(const SkDVector& a) const { + return fX * a.fX + fY * a.fY; + } + + double length() const { + return sqrt(lengthSquared()); + } + + double lengthSquared() const { + return fX * fX + fY * fY; + } + + SkDVector& normalize() { + double inverseLength = sk_ieee_double_divide(1, this->length()); + fX *= inverseLength; + fY *= inverseLength; + return *this; + } + + bool isFinite() const { + return std::isfinite(fX) && std::isfinite(fY); + } +}; + +struct SkDPoint { + double fX; + double fY; + + void set(const SkPoint& pt) { + fX = pt.fX; + fY = pt.fY; + } + + friend SkDVector operator-(const SkDPoint& a, const SkDPoint& b) { + return { a.fX - b.fX, a.fY - b.fY }; + } + + friend bool operator==(const SkDPoint& a, const SkDPoint& b) { + return a.fX == b.fX && a.fY == b.fY; + } + + friend bool operator!=(const SkDPoint& a, const SkDPoint& b) { + return a.fX != b.fX || a.fY != b.fY; + } + + void operator=(const SkPoint& pt) { + fX = pt.fX; + fY = pt.fY; + } + + // only used by testing + void operator+=(const SkDVector& v) { + fX += v.fX; + fY += v.fY; + } + + // only used by testing + void operator-=(const SkDVector& v) { + fX -= v.fX; + fY -= v.fY; + } + + // only used by testing + SkDPoint operator+(const SkDVector& v) { + SkDPoint result = *this; + result += v; + return result; + } + + // only used by testing + SkDPoint operator-(const SkDVector& v) { + SkDPoint result = *this; + result -= v; + return result; + } + + // note: this can not be implemented with + // return approximately_equal(a.fY, fY) && approximately_equal(a.fX, fX); + // because that will not take the magnitude of the values into account + bool approximatelyDEqual(const SkDPoint& a) const { + if (approximately_equal(fX, a.fX) && approximately_equal(fY, a.fY)) { + return true; + } + if (!RoughlyEqualUlps(fX, a.fX) || !RoughlyEqualUlps(fY, a.fY)) { + return false; + } + double dist = distance(a); // OPTIMIZATION: can we compare against distSq instead ? + double tiniest = std::min(std::min(std::min(fX, a.fX), fY), a.fY); + double largest = std::max(std::max(std::max(fX, a.fX), fY), a.fY); + largest = std::max(largest, -tiniest); + return AlmostDequalUlps(largest, largest + dist); // is the dist within ULPS tolerance? + } + + bool approximatelyDEqual(const SkPoint& a) const { + SkDPoint dA; + dA.set(a); + return approximatelyDEqual(dA); + } + + bool approximatelyEqual(const SkDPoint& a) const { + if (approximately_equal(fX, a.fX) && approximately_equal(fY, a.fY)) { + return true; + } + if (!RoughlyEqualUlps(fX, a.fX) || !RoughlyEqualUlps(fY, a.fY)) { + return false; + } + double dist = distance(a); // OPTIMIZATION: can we compare against distSq instead ? + double tiniest = std::min(std::min(std::min(fX, a.fX), fY), a.fY); + double largest = std::max(std::max(std::max(fX, a.fX), fY), a.fY); + largest = std::max(largest, -tiniest); + return AlmostPequalUlps(largest, largest + dist); // is the dist within ULPS tolerance? + } + + bool approximatelyEqual(const SkPoint& a) const { + SkDPoint dA; + dA.set(a); + return approximatelyEqual(dA); + } + + static bool ApproximatelyEqual(const SkPoint& a, const SkPoint& b) { + if (approximately_equal(a.fX, b.fX) && approximately_equal(a.fY, b.fY)) { + return true; + } + if (!RoughlyEqualUlps(a.fX, b.fX) || !RoughlyEqualUlps(a.fY, b.fY)) { + return false; + } + SkDPoint dA, dB; + dA.set(a); + dB.set(b); + double dist = dA.distance(dB); // OPTIMIZATION: can we compare against distSq instead ? + float tiniest = std::min(std::min(std::min(a.fX, b.fX), a.fY), b.fY); + float largest = std::max(std::max(std::max(a.fX, b.fX), a.fY), b.fY); + largest = std::max(largest, -tiniest); + return AlmostDequalUlps((double) largest, largest + dist); // is dist within ULPS tolerance? + } + + // only used by testing + bool approximatelyZero() const { + return approximately_zero(fX) && approximately_zero(fY); + } + + SkPoint asSkPoint() const { + SkPoint pt = {SkDoubleToScalar(fX), SkDoubleToScalar(fY)}; + return pt; + } + + double distance(const SkDPoint& a) const { + SkDVector temp = *this - a; + return temp.length(); + } + + double distanceSquared(const SkDPoint& a) const { + SkDVector temp = *this - a; + return temp.lengthSquared(); + } + + static SkDPoint Mid(const SkDPoint& a, const SkDPoint& b) { + SkDPoint result; + result.fX = (a.fX + b.fX) / 2; + result.fY = (a.fY + b.fY) / 2; + return result; + } + + bool roughlyEqual(const SkDPoint& a) const { + if (roughly_equal(fX, a.fX) && roughly_equal(fY, a.fY)) { + return true; + } + double dist = distance(a); // OPTIMIZATION: can we compare against distSq instead ? + double tiniest = std::min(std::min(std::min(fX, a.fX), fY), a.fY); + double largest = std::max(std::max(std::max(fX, a.fX), fY), a.fY); + largest = std::max(largest, -tiniest); + return RoughlyEqualUlps(largest, largest + dist); // is the dist within ULPS tolerance? + } + + static bool RoughlyEqual(const SkPoint& a, const SkPoint& b) { + if (!RoughlyEqualUlps(a.fX, b.fX) && !RoughlyEqualUlps(a.fY, b.fY)) { + return false; + } + SkDPoint dA, dB; + dA.set(a); + dB.set(b); + double dist = dA.distance(dB); // OPTIMIZATION: can we compare against distSq instead ? + float tiniest = std::min(std::min(std::min(a.fX, b.fX), a.fY), b.fY); + float largest = std::max(std::max(std::max(a.fX, b.fX), a.fY), b.fY); + largest = std::max(largest, -tiniest); + return RoughlyEqualUlps((double) largest, largest + dist); // is dist within ULPS tolerance? + } + + // very light weight check, should only be used for inequality check + static bool WayRoughlyEqual(const SkPoint& a, const SkPoint& b) { + float largestNumber = std::max(SkTAbs(a.fX), std::max(SkTAbs(a.fY), + std::max(SkTAbs(b.fX), SkTAbs(b.fY)))); + SkVector diffs = a - b; + float largestDiff = std::max(diffs.fX, diffs.fY); + return roughly_zero_when_compared_to(largestDiff, largestNumber); + } + + // utilities callable by the user from the debugger when the implementation code is linked in + void dump() const; + static void Dump(const SkPoint& pt); + static void DumpHex(const SkPoint& pt); +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsQuad.cpp b/gfx/skia/skia/src/pathops/SkPathOpsQuad.cpp new file mode 100644 index 0000000000..74578734aa --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsQuad.cpp @@ -0,0 +1,423 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsQuad.h" + +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkLineParameters.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsRect.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +// from blackpawn.com/texts/pointinpoly +static bool pointInTriangle(const SkDPoint fPts[3], const SkDPoint& test) { + SkDVector v0 = fPts[2] - fPts[0]; + SkDVector v1 = fPts[1] - fPts[0]; + SkDVector v2 = test - fPts[0]; + double dot00 = v0.dot(v0); + double dot01 = v0.dot(v1); + double dot02 = v0.dot(v2); + double dot11 = v1.dot(v1); + double dot12 = v1.dot(v2); + // Compute barycentric coordinates + double denom = dot00 * dot11 - dot01 * dot01; + double u = dot11 * dot02 - dot01 * dot12; + double v = dot00 * dot12 - dot01 * dot02; + // Check if point is in triangle + if (denom >= 0) { + return u >= 0 && v >= 0 && u + v < denom; + } + return u <= 0 && v <= 0 && u + v > denom; +} + +static bool matchesEnd(const SkDPoint fPts[3], const SkDPoint& test) { + return fPts[0] == test || fPts[2] == test; +} + +/* started with at_most_end_pts_in_common from SkDQuadIntersection.cpp */ +// Do a quick reject by rotating all points relative to a line formed by +// a pair of one quad's points. If the 2nd quad's points +// are on the line or on the opposite side from the 1st quad's 'odd man', the +// curves at most intersect at the endpoints. +/* if returning true, check contains true if quad's hull collapsed, making the cubic linear + if returning false, check contains true if the the quad pair have only the end point in common +*/ +bool SkDQuad::hullIntersects(const SkDQuad& q2, bool* isLinear) const { + bool linear = true; + for (int oddMan = 0; oddMan < kPointCount; ++oddMan) { + const SkDPoint* endPt[2]; + this->otherPts(oddMan, endPt); + double origX = endPt[0]->fX; + double origY = endPt[0]->fY; + double adj = endPt[1]->fX - origX; + double opp = endPt[1]->fY - origY; + double sign = (fPts[oddMan].fY - origY) * adj - (fPts[oddMan].fX - origX) * opp; + if (approximately_zero(sign)) { + continue; + } + linear = false; + bool foundOutlier = false; + for (int n = 0; n < kPointCount; ++n) { + double test = (q2[n].fY - origY) * adj - (q2[n].fX - origX) * opp; + if (test * sign > 0 && !precisely_zero(test)) { + foundOutlier = true; + break; + } + } + if (!foundOutlier) { + return false; + } + } + if (linear && !matchesEnd(fPts, q2.fPts[0]) && !matchesEnd(fPts, q2.fPts[2])) { + // if the end point of the opposite quad is inside the hull that is nearly a line, + // then representing the quad as a line may cause the intersection to be missed. + // Check to see if the endpoint is in the triangle. + if (pointInTriangle(fPts, q2.fPts[0]) || pointInTriangle(fPts, q2.fPts[2])) { + linear = false; + } + } + *isLinear = linear; + return true; +} + +bool SkDQuad::hullIntersects(const SkDConic& conic, bool* isLinear) const { + return conic.hullIntersects(*this, isLinear); +} + +bool SkDQuad::hullIntersects(const SkDCubic& cubic, bool* isLinear) const { + return cubic.hullIntersects(*this, isLinear); +} + +/* bit twiddling for finding the off curve index (x&~m is the pair in [0,1,2] excluding oddMan) +oddMan opp x=oddMan^opp x=x-oddMan m=x>>2 x&~m + 0 1 1 1 0 1 + 2 2 2 0 2 + 1 1 0 -1 -1 0 + 2 3 2 0 2 + 2 1 3 1 0 1 + 2 0 -2 -1 0 +*/ +void SkDQuad::otherPts(int oddMan, const SkDPoint* endPt[2]) const { + for (int opp = 1; opp < kPointCount; ++opp) { + int end = (oddMan ^ opp) - oddMan; // choose a value not equal to oddMan + end &= ~(end >> 2); // if the value went negative, set it to zero + endPt[opp - 1] = &fPts[end]; + } +} + +int SkDQuad::AddValidTs(double s[], int realRoots, double* t) { + int foundRoots = 0; + for (int index = 0; index < realRoots; ++index) { + double tValue = s[index]; + if (approximately_zero_or_more(tValue) && approximately_one_or_less(tValue)) { + if (approximately_less_than_zero(tValue)) { + tValue = 0; + } else if (approximately_greater_than_one(tValue)) { + tValue = 1; + } + for (int idx2 = 0; idx2 < foundRoots; ++idx2) { + if (approximately_equal(t[idx2], tValue)) { + goto nextRoot; + } + } + t[foundRoots++] = tValue; + } +nextRoot: + {} + } + return foundRoots; +} + +// note: caller expects multiple results to be sorted smaller first +// note: http://en.wikipedia.org/wiki/Loss_of_significance has an interesting +// analysis of the quadratic equation, suggesting why the following looks at +// the sign of B -- and further suggesting that the greatest loss of precision +// is in b squared less two a c +int SkDQuad::RootsValidT(double A, double B, double C, double t[2]) { + double s[2]; + int realRoots = RootsReal(A, B, C, s); + int foundRoots = AddValidTs(s, realRoots, t); + return foundRoots; +} + +static int handle_zero(const double B, const double C, double s[2]) { + if (approximately_zero(B)) { + s[0] = 0; + return C == 0; + } + s[0] = -C / B; + return 1; +} + +/* +Numeric Solutions (5.6) suggests to solve the quadratic by computing + Q = -1/2(B + sgn(B)Sqrt(B^2 - 4 A C)) +and using the roots + t1 = Q / A + t2 = C / Q +*/ +// this does not discard real roots <= 0 or >= 1 +// TODO(skbug.com/14063) Deduplicate with SkQuads::RootsReal +int SkDQuad::RootsReal(const double A, const double B, const double C, double s[2]) { + if (!A) { + return handle_zero(B, C, s); + } + const double p = B / (2 * A); + const double q = C / A; + if (approximately_zero(A) && (approximately_zero_inverse(p) || approximately_zero_inverse(q))) { + return handle_zero(B, C, s); + } + /* normal form: x^2 + px + q = 0 */ + const double p2 = p * p; + if (!AlmostDequalUlps(p2, q) && p2 < q) { + return 0; + } + double sqrt_D = 0; + if (p2 > q) { + sqrt_D = sqrt(p2 - q); + } + s[0] = sqrt_D - p; + s[1] = -sqrt_D - p; + return 1 + !AlmostDequalUlps(s[0], s[1]); +} + +bool SkDQuad::isLinear(int startIndex, int endIndex) const { + SkLineParameters lineParameters; + lineParameters.quadEndPoints(*this, startIndex, endIndex); + // FIXME: maybe it's possible to avoid this and compare non-normalized + lineParameters.normalize(); + double distance = lineParameters.controlPtDistance(*this); + double tiniest = std::min(std::min(std::min(std::min(std::min(fPts[0].fX, fPts[0].fY), + fPts[1].fX), fPts[1].fY), fPts[2].fX), fPts[2].fY); + double largest = std::max(std::max(std::max(std::max(std::max(fPts[0].fX, fPts[0].fY), + fPts[1].fX), fPts[1].fY), fPts[2].fX), fPts[2].fY); + largest = std::max(largest, -tiniest); + return approximately_zero_when_compared_to(distance, largest); +} + +SkDVector SkDQuad::dxdyAtT(double t) const { + double a = t - 1; + double b = 1 - 2 * t; + double c = t; + SkDVector result = { a * fPts[0].fX + b * fPts[1].fX + c * fPts[2].fX, + a * fPts[0].fY + b * fPts[1].fY + c * fPts[2].fY }; + if (result.fX == 0 && result.fY == 0) { + if (zero_or_one(t)) { + result = fPts[2] - fPts[0]; + } else { + // incomplete + SkDebugf("!q"); + } + } + return result; +} + +// OPTIMIZE: assert if caller passes in t == 0 / t == 1 ? +SkDPoint SkDQuad::ptAtT(double t) const { + if (0 == t) { + return fPts[0]; + } + if (1 == t) { + return fPts[2]; + } + double one_t = 1 - t; + double a = one_t * one_t; + double b = 2 * one_t * t; + double c = t * t; + SkDPoint result = { a * fPts[0].fX + b * fPts[1].fX + c * fPts[2].fX, + a * fPts[0].fY + b * fPts[1].fY + c * fPts[2].fY }; + return result; +} + +static double interp_quad_coords(const double* src, double t) { + if (0 == t) { + return src[0]; + } + if (1 == t) { + return src[4]; + } + double ab = SkDInterp(src[0], src[2], t); + double bc = SkDInterp(src[2], src[4], t); + double abc = SkDInterp(ab, bc, t); + return abc; +} + +bool SkDQuad::monotonicInX() const { + return between(fPts[0].fX, fPts[1].fX, fPts[2].fX); +} + +bool SkDQuad::monotonicInY() const { + return between(fPts[0].fY, fPts[1].fY, fPts[2].fY); +} + +/* +Given a quadratic q, t1, and t2, find a small quadratic segment. + +The new quadratic is defined by A, B, and C, where + A = c[0]*(1 - t1)*(1 - t1) + 2*c[1]*t1*(1 - t1) + c[2]*t1*t1 + C = c[3]*(1 - t1)*(1 - t1) + 2*c[2]*t1*(1 - t1) + c[1]*t1*t1 + +To find B, compute the point halfway between t1 and t2: + +q(at (t1 + t2)/2) == D + +Next, compute where D must be if we know the value of B: + +_12 = A/2 + B/2 +12_ = B/2 + C/2 +123 = A/4 + B/2 + C/4 + = D + +Group the known values on one side: + +B = D*2 - A/2 - C/2 +*/ + +// OPTIMIZE? : special case t1 = 1 && t2 = 0 +SkDQuad SkDQuad::subDivide(double t1, double t2) const { + if (0 == t1 && 1 == t2) { + return *this; + } + SkDQuad dst; + double ax = dst[0].fX = interp_quad_coords(&fPts[0].fX, t1); + double ay = dst[0].fY = interp_quad_coords(&fPts[0].fY, t1); + double dx = interp_quad_coords(&fPts[0].fX, (t1 + t2) / 2); + double dy = interp_quad_coords(&fPts[0].fY, (t1 + t2) / 2); + double cx = dst[2].fX = interp_quad_coords(&fPts[0].fX, t2); + double cy = dst[2].fY = interp_quad_coords(&fPts[0].fY, t2); + /* bx = */ dst[1].fX = 2 * dx - (ax + cx) / 2; + /* by = */ dst[1].fY = 2 * dy - (ay + cy) / 2; + return dst; +} + +void SkDQuad::align(int endIndex, SkDPoint* dstPt) const { + if (fPts[endIndex].fX == fPts[1].fX) { + dstPt->fX = fPts[endIndex].fX; + } + if (fPts[endIndex].fY == fPts[1].fY) { + dstPt->fY = fPts[endIndex].fY; + } +} + +SkDPoint SkDQuad::subDivide(const SkDPoint& a, const SkDPoint& c, double t1, double t2) const { + SkASSERT(t1 != t2); + SkDPoint b; + SkDQuad sub = subDivide(t1, t2); + SkDLine b0 = {{a, sub[1] + (a - sub[0])}}; + SkDLine b1 = {{c, sub[1] + (c - sub[2])}}; + SkIntersections i; + i.intersectRay(b0, b1); + if (i.used() == 1 && i[0][0] >= 0 && i[1][0] >= 0) { + b = i.pt(0); + } else { + SkASSERT(i.used() <= 2); + return SkDPoint::Mid(b0[1], b1[1]); + } + if (t1 == 0 || t2 == 0) { + align(0, &b); + } + if (t1 == 1 || t2 == 1) { + align(2, &b); + } + if (AlmostBequalUlps(b.fX, a.fX)) { + b.fX = a.fX; + } else if (AlmostBequalUlps(b.fX, c.fX)) { + b.fX = c.fX; + } + if (AlmostBequalUlps(b.fY, a.fY)) { + b.fY = a.fY; + } else if (AlmostBequalUlps(b.fY, c.fY)) { + b.fY = c.fY; + } + return b; +} + +/* classic one t subdivision */ +static void interp_quad_coords(const double* src, double* dst, double t) { + double ab = SkDInterp(src[0], src[2], t); + double bc = SkDInterp(src[2], src[4], t); + dst[0] = src[0]; + dst[2] = ab; + dst[4] = SkDInterp(ab, bc, t); + dst[6] = bc; + dst[8] = src[4]; +} + +SkDQuadPair SkDQuad::chopAt(double t) const +{ + SkDQuadPair dst; + interp_quad_coords(&fPts[0].fX, &dst.pts[0].fX, t); + interp_quad_coords(&fPts[0].fY, &dst.pts[0].fY, t); + return dst; +} + +static int valid_unit_divide(double numer, double denom, double* ratio) +{ + if (numer < 0) { + numer = -numer; + denom = -denom; + } + if (denom == 0 || numer == 0 || numer >= denom) { + return 0; + } + double r = numer / denom; + if (r == 0) { // catch underflow if numer <<<< denom + return 0; + } + *ratio = r; + return 1; +} + +/** Quad'(t) = At + B, where + A = 2(a - 2b + c) + B = 2(b - a) + Solve for t, only if it fits between 0 < t < 1 +*/ +int SkDQuad::FindExtrema(const double src[], double tValue[1]) { + /* At + B == 0 + t = -B / A + */ + double a = src[0]; + double b = src[2]; + double c = src[4]; + return valid_unit_divide(a - b, a - b - b + c, tValue); +} + +/* Parameterization form, given A*t*t + 2*B*t*(1-t) + C*(1-t)*(1-t) + * + * a = A - 2*B + C + * b = 2*B - 2*C + * c = C + */ +void SkDQuad::SetABC(const double* quad, double* a, double* b, double* c) { + *a = quad[0]; // a = A + *b = 2 * quad[2]; // b = 2*B + *c = quad[4]; // c = C + *b -= *c; // b = 2*B - C + *a -= *b; // a = A - 2*B + C + *b -= *c; // b = 2*B - 2*C +} + +int SkTQuad::intersectRay(SkIntersections* i, const SkDLine& line) const { + return i->intersectRay(fQuad, line); +} + +bool SkTQuad::hullIntersects(const SkDConic& conic, bool* isLinear) const { + return conic.hullIntersects(fQuad, isLinear); +} + +bool SkTQuad::hullIntersects(const SkDCubic& cubic, bool* isLinear) const { + return cubic.hullIntersects(fQuad, isLinear); +} + +void SkTQuad::setBounds(SkDRect* rect) const { + rect->setBounds(fQuad); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsQuad.h b/gfx/skia/skia/src/pathops/SkPathOpsQuad.h new file mode 100644 index 0000000000..076e0a7039 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsQuad.h @@ -0,0 +1,196 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathOpsQuad_DEFINED +#define SkPathOpsQuad_DEFINED + +#include "include/core/SkPoint.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTCurve.h" + +class SkIntersections; +class SkOpGlobalState; +struct SkDConic; +struct SkDLine; +struct SkDQuad; +struct SkDRect; + +struct SkDQuadPair { + const SkDQuad& first() const { return (const SkDQuad&) pts[0]; } + const SkDQuad& second() const { return (const SkDQuad&) pts[2]; } + SkDPoint pts[5]; +}; + +struct SkDQuad { + static const int kPointCount = 3; + static const int kPointLast = kPointCount - 1; + static const int kMaxIntersections = 4; + + SkDPoint fPts[kPointCount]; + + bool collapsed() const { + return fPts[0].approximatelyEqual(fPts[1]) && fPts[0].approximatelyEqual(fPts[2]); + } + + bool controlsInside() const { + SkDVector v01 = fPts[0] - fPts[1]; + SkDVector v02 = fPts[0] - fPts[2]; + SkDVector v12 = fPts[1] - fPts[2]; + return v02.dot(v01) > 0 && v02.dot(v12) > 0; + } + + void debugInit() { + sk_bzero(fPts, sizeof(fPts)); + } + + void debugSet(const SkDPoint* pts); + + SkDQuad flip() const { + SkDQuad result = {{fPts[2], fPts[1], fPts[0]} SkDEBUGPARAMS(fDebugGlobalState) }; + return result; + } + + static bool IsConic() { return false; } + + const SkDQuad& set(const SkPoint pts[kPointCount] + SkDEBUGPARAMS(SkOpGlobalState* state = nullptr)) { + fPts[0] = pts[0]; + fPts[1] = pts[1]; + fPts[2] = pts[2]; + SkDEBUGCODE(fDebugGlobalState = state); + return *this; + } + + const SkDPoint& operator[](int n) const { SkASSERT(n >= 0 && n < kPointCount); return fPts[n]; } + SkDPoint& operator[](int n) { SkASSERT(n >= 0 && n < kPointCount); return fPts[n]; } + + static int AddValidTs(double s[], int realRoots, double* t); + void align(int endIndex, SkDPoint* dstPt) const; + SkDQuadPair chopAt(double t) const; + SkDVector dxdyAtT(double t) const; + static int FindExtrema(const double src[], double tValue[1]); + +#ifdef SK_DEBUG + SkOpGlobalState* globalState() const { return fDebugGlobalState; } +#endif + + /** + * Return the number of valid roots (0 < root < 1) for this cubic intersecting the + * specified horizontal line. + */ + int horizontalIntersect(double yIntercept, double roots[2]) const; + + bool hullIntersects(const SkDQuad& , bool* isLinear) const; + bool hullIntersects(const SkDConic& , bool* isLinear) const; + bool hullIntersects(const SkDCubic& , bool* isLinear) const; + bool isLinear(int startIndex, int endIndex) const; + static int maxIntersections() { return kMaxIntersections; } + bool monotonicInX() const; + bool monotonicInY() const; + void otherPts(int oddMan, const SkDPoint* endPt[2]) const; + static int pointCount() { return kPointCount; } + static int pointLast() { return kPointLast; } + SkDPoint ptAtT(double t) const; + static int RootsReal(double A, double B, double C, double t[2]); + static int RootsValidT(const double A, const double B, const double C, double s[2]); + static void SetABC(const double* quad, double* a, double* b, double* c); + SkDQuad subDivide(double t1, double t2) const; + void subDivide(double t1, double t2, SkDQuad* quad) const { *quad = this->subDivide(t1, t2); } + + static SkDQuad SubDivide(const SkPoint a[kPointCount], double t1, double t2) { + SkDQuad quad; + quad.set(a); + return quad.subDivide(t1, t2); + } + SkDPoint subDivide(const SkDPoint& a, const SkDPoint& c, double t1, double t2) const; + static SkDPoint SubDivide(const SkPoint pts[kPointCount], const SkDPoint& a, const SkDPoint& c, + double t1, double t2) { + SkDQuad quad; + quad.set(pts); + return quad.subDivide(a, c, t1, t2); + } + + /** + * Return the number of valid roots (0 < root < 1) for this cubic intersecting the + * specified vertical line. + */ + int verticalIntersect(double xIntercept, double roots[2]) const; + + SkDCubic debugToCubic() const; + // utilities callable by the user from the debugger when the implementation code is linked in + void dump() const; + void dumpID(int id) const; + void dumpInner() const; + + SkDEBUGCODE(SkOpGlobalState* fDebugGlobalState); +}; + + +class SkTQuad : public SkTCurve { +public: + SkDQuad fQuad; + + SkTQuad() {} + + SkTQuad(const SkDQuad& q) + : fQuad(q) { + } + + ~SkTQuad() override {} + + const SkDPoint& operator[](int n) const override { return fQuad[n]; } + SkDPoint& operator[](int n) override { return fQuad[n]; } + + bool collapsed() const override { return fQuad.collapsed(); } + bool controlsInside() const override { return fQuad.controlsInside(); } + void debugInit() override { return fQuad.debugInit(); } +#if DEBUG_T_SECT + void dumpID(int id) const override { return fQuad.dumpID(id); } +#endif + SkDVector dxdyAtT(double t) const override { return fQuad.dxdyAtT(t); } +#ifdef SK_DEBUG + SkOpGlobalState* globalState() const override { return fQuad.globalState(); } +#endif + + bool hullIntersects(const SkDQuad& quad, bool* isLinear) const override { + return quad.hullIntersects(fQuad, isLinear); + } + + bool hullIntersects(const SkDConic& conic, bool* isLinear) const override; + bool hullIntersects(const SkDCubic& cubic, bool* isLinear) const override; + + bool hullIntersects(const SkTCurve& curve, bool* isLinear) const override { + return curve.hullIntersects(fQuad, isLinear); + } + + int intersectRay(SkIntersections* i, const SkDLine& line) const override; + bool IsConic() const override { return false; } + SkTCurve* make(SkArenaAlloc& heap) const override { return heap.make(); } + + int maxIntersections() const override { return SkDQuad::kMaxIntersections; } + + void otherPts(int oddMan, const SkDPoint* endPt[2]) const override { + fQuad.otherPts(oddMan, endPt); + } + + int pointCount() const override { return SkDQuad::kPointCount; } + int pointLast() const override { return SkDQuad::kPointLast; } + SkDPoint ptAtT(double t) const override { return fQuad.ptAtT(t); } + void setBounds(SkDRect* ) const override; + + void subDivide(double t1, double t2, SkTCurve* curve) const override { + ((SkTQuad*) curve)->fQuad = fQuad.subDivide(t1, t2); + } +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsRect.cpp b/gfx/skia/skia/src/pathops/SkPathOpsRect.cpp new file mode 100644 index 0000000000..eb0a9b6b76 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsRect.cpp @@ -0,0 +1,67 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsRect.h" + +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsQuad.h" +#include "src/pathops/SkPathOpsTCurve.h" + +void SkDRect::setBounds(const SkDQuad& curve, const SkDQuad& sub, double startT, double endT) { + set(sub[0]); + add(sub[2]); + double tValues[2]; + int roots = 0; + if (!sub.monotonicInX()) { + roots = SkDQuad::FindExtrema(&sub[0].fX, tValues); + } + if (!sub.monotonicInY()) { + roots += SkDQuad::FindExtrema(&sub[0].fY, &tValues[roots]); + } + for (int index = 0; index < roots; ++index) { + double t = startT + (endT - startT) * tValues[index]; + add(curve.ptAtT(t)); + } +} + +void SkDRect::setBounds(const SkDConic& curve, const SkDConic& sub, double startT, double endT) { + set(sub[0]); + add(sub[2]); + double tValues[2]; + int roots = 0; + if (!sub.monotonicInX()) { + roots = SkDConic::FindExtrema(&sub[0].fX, sub.fWeight, tValues); + } + if (!sub.monotonicInY()) { + roots += SkDConic::FindExtrema(&sub[0].fY, sub.fWeight, &tValues[roots]); + } + for (int index = 0; index < roots; ++index) { + double t = startT + (endT - startT) * tValues[index]; + add(curve.ptAtT(t)); + } +} + +void SkDRect::setBounds(const SkDCubic& curve, const SkDCubic& sub, double startT, double endT) { + set(sub[0]); + add(sub[3]); + double tValues[4]; + int roots = 0; + if (!sub.monotonicInX()) { + roots = SkDCubic::FindExtrema(&sub[0].fX, tValues); + } + if (!sub.monotonicInY()) { + roots += SkDCubic::FindExtrema(&sub[0].fY, &tValues[roots]); + } + for (int index = 0; index < roots; ++index) { + double t = startT + (endT - startT) * tValues[index]; + add(curve.ptAtT(t)); + } +} + +void SkDRect::setBounds(const SkTCurve& curve) { + curve.setBounds(this); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsRect.h b/gfx/skia/skia/src/pathops/SkPathOpsRect.h new file mode 100644 index 0000000000..4abd50d705 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsRect.h @@ -0,0 +1,84 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsRect_DEFINED +#define SkPathOpsRect_DEFINED + +#include "include/core/SkTypes.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include + +class SkTCurve; +struct SkDConic; +struct SkDCubic; +struct SkDQuad; + +struct SkDRect { + double fLeft, fTop, fRight, fBottom; + + void add(const SkDPoint& pt) { + fLeft = std::min(fLeft, pt.fX); + fTop = std::min(fTop, pt.fY); + fRight = std::max(fRight, pt.fX); + fBottom = std::max(fBottom, pt.fY); + } + + bool contains(const SkDPoint& pt) const { + return approximately_between(fLeft, pt.fX, fRight) + && approximately_between(fTop, pt.fY, fBottom); + } + + void debugInit(); + + bool intersects(const SkDRect& r) const { + SkASSERT(fLeft <= fRight); + SkASSERT(fTop <= fBottom); + SkASSERT(r.fLeft <= r.fRight); + SkASSERT(r.fTop <= r.fBottom); + return r.fLeft <= fRight && fLeft <= r.fRight && r.fTop <= fBottom && fTop <= r.fBottom; + } + + void set(const SkDPoint& pt) { + fLeft = fRight = pt.fX; + fTop = fBottom = pt.fY; + } + + double width() const { + return fRight - fLeft; + } + + double height() const { + return fBottom - fTop; + } + + void setBounds(const SkDConic& curve) { + setBounds(curve, curve, 0, 1); + } + + void setBounds(const SkDConic& curve, const SkDConic& sub, double tStart, double tEnd); + + void setBounds(const SkDCubic& curve) { + setBounds(curve, curve, 0, 1); + } + + void setBounds(const SkDCubic& curve, const SkDCubic& sub, double tStart, double tEnd); + + void setBounds(const SkDQuad& curve) { + setBounds(curve, curve, 0, 1); + } + + void setBounds(const SkDQuad& curve, const SkDQuad& sub, double tStart, double tEnd); + + void setBounds(const SkTCurve& curve); + + bool valid() const { + return fLeft <= fRight && fTop <= fBottom; + } +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsSimplify.cpp b/gfx/skia/skia/src/pathops/SkPathOpsSimplify.cpp new file mode 100644 index 0000000000..d9c4c46101 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsSimplify.cpp @@ -0,0 +1,236 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPath.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkTypes.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkTDArray.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkAddIntersections.h" +#include "src/pathops/SkOpCoincidence.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpEdgeBuilder.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsCommon.h" +#include "src/pathops/SkPathOpsTypes.h" +#include "src/pathops/SkPathWriter.h" + +static bool bridgeWinding(SkOpContourHead* contourList, SkPathWriter* writer) { + bool unsortable = false; + do { + SkOpSpan* span = FindSortableTop(contourList); + if (!span) { + break; + } + SkOpSegment* current = span->segment(); + SkOpSpanBase* start = span->next(); + SkOpSpanBase* end = span; + SkTDArray chase; + do { + if (current->activeWinding(start, end)) { + do { + if (!unsortable && current->done()) { + break; + } + SkASSERT(unsortable || !current->done()); + SkOpSpanBase* nextStart = start; + SkOpSpanBase* nextEnd = end; + SkOpSegment* next = current->findNextWinding(&chase, &nextStart, &nextEnd, + &unsortable); + if (!next) { + break; + } + #if DEBUG_FLOW + SkDebugf("%s current id=%d from=(%1.9g,%1.9g) to=(%1.9g,%1.9g)\n", __FUNCTION__, + current->debugID(), start->pt().fX, start->pt().fY, + end->pt().fX, end->pt().fY); + #endif + if (!current->addCurveTo(start, end, writer)) { + return false; + } + current = next; + start = nextStart; + end = nextEnd; + } while (!writer->isClosed() && (!unsortable || !start->starter(end)->done())); + if (current->activeWinding(start, end) && !writer->isClosed()) { + SkOpSpan* spanStart = start->starter(end); + if (!spanStart->done()) { + if (!current->addCurveTo(start, end, writer)) { + return false; + } + current->markDone(spanStart); + } + } + writer->finishContour(); + } else { + SkOpSpanBase* last; + if (!current->markAndChaseDone(start, end, &last)) { + return false; + } + if (last && !last->chased()) { + last->setChased(true); + SkASSERT(!SkPathOpsDebug::ChaseContains(chase, last)); + *chase.append() = last; +#if DEBUG_WINDING + SkDebugf("%s chase.append id=%d", __FUNCTION__, last->segment()->debugID()); + if (!last->final()) { + SkDebugf(" windSum=%d", last->upCast()->windSum()); + } + SkDebugf("\n"); +#endif + } + } + current = FindChase(&chase, &start, &end); + SkPathOpsDebug::ShowActiveSpans(contourList); + if (!current) { + break; + } + } while (true); + } while (true); + return true; +} + +// returns true if all edges were processed +static bool bridgeXor(SkOpContourHead* contourList, SkPathWriter* writer) { + bool unsortable = false; + int safetyNet = 1000000; + do { + SkOpSpan* span = FindUndone(contourList); + if (!span) { + break; + } + SkOpSegment* current = span->segment(); + SkOpSpanBase* start = span->next(); + SkOpSpanBase* end = span; + do { + if (--safetyNet < 0) { + return false; + } + if (!unsortable && current->done()) { + break; + } + SkASSERT(unsortable || !current->done()); + SkOpSpanBase* nextStart = start; + SkOpSpanBase* nextEnd = end; + SkOpSegment* next = current->findNextXor(&nextStart, &nextEnd, + &unsortable); + if (!next) { + break; + } + #if DEBUG_FLOW + SkDebugf("%s current id=%d from=(%1.9g,%1.9g) to=(%1.9g,%1.9g)\n", __FUNCTION__, + current->debugID(), start->pt().fX, start->pt().fY, + end->pt().fX, end->pt().fY); + #endif + if (!current->addCurveTo(start, end, writer)) { + return false; + } + current = next; + start = nextStart; + end = nextEnd; + } while (!writer->isClosed() && (!unsortable || !start->starter(end)->done())); + if (!writer->isClosed()) { + SkOpSpan* spanStart = start->starter(end); + if (!spanStart->done()) { + return false; + } + } + writer->finishContour(); + SkPathOpsDebug::ShowActiveSpans(contourList); + } while (true); + return true; +} + +// FIXME : add this as a member of SkPath +bool SimplifyDebug(const SkPath& path, SkPath* result + SkDEBUGPARAMS(bool skipAssert) SkDEBUGPARAMS(const char* testName)) { + // returns 1 for evenodd, -1 for winding, regardless of inverse-ness + SkPathFillType fillType = path.isInverseFillType() ? SkPathFillType::kInverseEvenOdd + : SkPathFillType::kEvenOdd; + if (path.isConvex()) { + if (result != &path) { + *result = path; + } + result->setFillType(fillType); + return true; + } + // turn path into list of segments + SkSTArenaAlloc<4096> allocator; // FIXME: constant-ize, tune + SkOpContour contour; + SkOpContourHead* contourList = static_cast(&contour); + SkOpGlobalState globalState(contourList, &allocator + SkDEBUGPARAMS(skipAssert) SkDEBUGPARAMS(testName)); + SkOpCoincidence coincidence(&globalState); +#if DEBUG_DUMP_VERIFY +#ifndef SK_DEBUG + const char* testName = "release"; +#endif + if (SkPathOpsDebug::gDumpOp) { + DumpSimplify(path, testName); + } +#endif +#if DEBUG_SORT + SkPathOpsDebug::gSortCount = SkPathOpsDebug::gSortCountDefault; +#endif + SkOpEdgeBuilder builder(path, contourList, &globalState); + if (!builder.finish()) { + return false; + } +#if DEBUG_DUMP_SEGMENTS + contour.dumpSegments(); +#endif + if (!SortContourList(&contourList, false, false)) { + result->reset(); + result->setFillType(fillType); + return true; + } + // find all intersections between segments + SkOpContour* current = contourList; + do { + SkOpContour* next = current; + while (AddIntersectTs(current, next, &coincidence) + && (next = next->next())); + } while ((current = current->next())); +#if DEBUG_VALIDATE + globalState.setPhase(SkOpPhase::kWalking); +#endif + bool success = HandleCoincidence(contourList, &coincidence); +#if DEBUG_COIN + globalState.debugAddToGlobalCoinDicts(); +#endif + if (!success) { + return false; + } +#if DEBUG_DUMP_ALIGNMENT + contour.dumpSegments("aligned"); +#endif + // construct closed contours + result->reset(); + result->setFillType(fillType); + SkPathWriter wrapper(*result); + if (builder.xorMask() == kWinding_PathOpsMask ? !bridgeWinding(contourList, &wrapper) + : !bridgeXor(contourList, &wrapper)) { + return false; + } + wrapper.assemble(); // if some edges could not be resolved, assemble remaining + return true; +} + +bool Simplify(const SkPath& path, SkPath* result) { +#if DEBUG_DUMP_VERIFY + if (SkPathOpsDebug::gVerifyOp) { + if (!SimplifyDebug(path, result SkDEBUGPARAMS(false) SkDEBUGPARAMS(nullptr))) { + ReportSimplifyFail(path); + return false; + } + VerifySimplify(path, *result); + return true; + } +#endif + return SimplifyDebug(path, result SkDEBUGPARAMS(true) SkDEBUGPARAMS(nullptr)); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsTCurve.h b/gfx/skia/skia/src/pathops/SkPathOpsTCurve.h new file mode 100644 index 0000000000..1f9030e275 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsTCurve.h @@ -0,0 +1,49 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPathOpsTCurve_DEFINED +#define SkPathOpsTCurve_DEFINED + +#include "src/pathops/SkPathOpsPoint.h" + +class SkArenaAlloc; +class SkIntersections; +struct SkDRect; + +class SkTCurve { +public: + virtual ~SkTCurve() {} + virtual const SkDPoint& operator[](int n) const = 0; + virtual SkDPoint& operator[](int n) = 0; + + virtual bool collapsed() const = 0; + virtual bool controlsInside() const = 0; + virtual void debugInit() = 0; +#if DEBUG_T_SECT + virtual void dumpID(int id) const = 0; +#endif + virtual SkDVector dxdyAtT(double t) const = 0; + virtual bool hullIntersects(const SkDQuad& , bool* isLinear) const = 0; + virtual bool hullIntersects(const SkDConic& , bool* isLinear) const = 0; + virtual bool hullIntersects(const SkDCubic& , bool* isLinear) const = 0; + virtual bool hullIntersects(const SkTCurve& , bool* isLinear) const = 0; + virtual int intersectRay(SkIntersections* i, const SkDLine& line) const = 0; + virtual bool IsConic() const = 0; + virtual SkTCurve* make(SkArenaAlloc& ) const = 0; + virtual int maxIntersections() const = 0; + virtual void otherPts(int oddMan, const SkDPoint* endPt[2]) const = 0; + virtual int pointCount() const = 0; + virtual int pointLast() const = 0; + virtual SkDPoint ptAtT(double t) const = 0; + virtual void setBounds(SkDRect* ) const = 0; + virtual void subDivide(double t1, double t2, SkTCurve* curve) const = 0; +#ifdef SK_DEBUG + virtual SkOpGlobalState* globalState() const = 0; +#endif +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsTSect.cpp b/gfx/skia/skia/src/pathops/SkPathOpsTSect.cpp new file mode 100644 index 0000000000..7c49330fdd --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsTSect.cpp @@ -0,0 +1,2149 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pathops/SkPathOpsTSect.h" + +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkTArray.h" +#include "src/base/SkTSort.h" +#include "src/pathops/SkIntersections.h" +#include "src/pathops/SkPathOpsConic.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsQuad.h" + +#include +#include +#include +#include + +#define COINCIDENT_SPAN_COUNT 9 + +void SkTCoincident::setPerp(const SkTCurve& c1, double t, + const SkDPoint& cPt, const SkTCurve& c2) { + SkDVector dxdy = c1.dxdyAtT(t); + SkDLine perp = {{ cPt, {cPt.fX + dxdy.fY, cPt.fY - dxdy.fX} }}; + SkIntersections i SkDEBUGCODE((c1.globalState())); + int used = i.intersectRay(c2, perp); + // only keep closest + if (used == 0 || used == 3) { + this->init(); + return; + } + fPerpT = i[0][0]; + fPerpPt = i.pt(0); + SkASSERT(used <= 2); + if (used == 2) { + double distSq = (fPerpPt - cPt).lengthSquared(); + double dist2Sq = (i.pt(1) - cPt).lengthSquared(); + if (dist2Sq < distSq) { + fPerpT = i[0][1]; + fPerpPt = i.pt(1); + } + } +#if DEBUG_T_SECT + SkDebugf("setPerp t=%1.9g cPt=(%1.9g,%1.9g) %s oppT=%1.9g fPerpPt=(%1.9g,%1.9g)\n", + t, cPt.fX, cPt.fY, + cPt.approximatelyEqual(fPerpPt) ? "==" : "!=", fPerpT, fPerpPt.fX, fPerpPt.fY); +#endif + fMatch = cPt.approximatelyEqual(fPerpPt); +#if DEBUG_T_SECT + if (fMatch) { + SkDebugf("%s", ""); // allow setting breakpoint + } +#endif +} + +void SkTSpan::addBounded(SkTSpan* span, SkArenaAlloc* heap) { + SkTSpanBounded* bounded = heap->make(); + bounded->fBounded = span; + bounded->fNext = fBounded; + fBounded = bounded; +} + +SkTSpan* SkTSect::addFollowing( + SkTSpan* prior) { + SkTSpan* result = this->addOne(); + SkDEBUGCODE(result->debugSetGlobalState(this->globalState())); + result->fStartT = prior ? prior->fEndT : 0; + SkTSpan* next = prior ? prior->fNext : fHead; + result->fEndT = next ? next->fStartT : 1; + result->fPrev = prior; + result->fNext = next; + if (prior) { + prior->fNext = result; + } else { + fHead = result; + } + if (next) { + next->fPrev = result; + } + result->resetBounds(fCurve); + // world may not be consistent to call validate here + result->validate(); + return result; +} + +void SkTSect::addForPerp(SkTSpan* span, double t) { + if (!span->hasOppT(t)) { + SkTSpan* priorSpan; + SkTSpan* opp = this->spanAtT(t, &priorSpan); + if (!opp) { + opp = this->addFollowing(priorSpan); +#if DEBUG_PERP + SkDebugf("%s priorSpan=%d t=%1.9g opp=%d\n", __FUNCTION__, priorSpan ? + priorSpan->debugID() : -1, t, opp->debugID()); +#endif + } +#if DEBUG_PERP + opp->dump(); SkDebugf("\n"); + SkDebugf("%s addBounded span=%d opp=%d\n", __FUNCTION__, priorSpan ? + priorSpan->debugID() : -1, opp->debugID()); +#endif + opp->addBounded(span, &fHeap); + span->addBounded(opp, &fHeap); + } + this->validate(); +#if DEBUG_T_SECT + span->validatePerpT(t); +#endif +} + +double SkTSpan::closestBoundedT(const SkDPoint& pt) const { + double result = -1; + double closest = DBL_MAX; + const SkTSpanBounded* testBounded = fBounded; + while (testBounded) { + const SkTSpan* test = testBounded->fBounded; + double startDist = test->pointFirst().distanceSquared(pt); + if (closest > startDist) { + closest = startDist; + result = test->fStartT; + } + double endDist = test->pointLast().distanceSquared(pt); + if (closest > endDist) { + closest = endDist; + result = test->fEndT; + } + testBounded = testBounded->fNext; + } + SkASSERT(between(0, result, 1)); + return result; +} + +#ifdef SK_DEBUG + +bool SkTSpan::debugIsBefore(const SkTSpan* span) const { + const SkTSpan* work = this; + do { + if (span == work) { + return true; + } + } while ((work = work->fNext)); + return false; +} +#endif + +bool SkTSpan::contains(double t) const { + const SkTSpan* work = this; + do { + if (between(work->fStartT, t, work->fEndT)) { + return true; + } + } while ((work = work->fNext)); + return false; +} + +const SkTSect* SkTSpan::debugOpp() const { + return SkDEBUGRELEASE(fDebugSect->debugOpp(), nullptr); +} + +SkTSpan* SkTSpan::findOppSpan( + const SkTSpan* opp) const { + SkTSpanBounded* bounded = fBounded; + while (bounded) { + SkTSpan* test = bounded->fBounded; + if (opp == test) { + return test; + } + bounded = bounded->fNext; + } + return nullptr; +} + +// returns 0 if no hull intersection +// 1 if hulls intersect +// 2 if hulls only share a common endpoint +// -1 if linear and further checking is required + +int SkTSpan::hullCheck(const SkTSpan* opp, + bool* start, bool* oppStart) { + if (fIsLinear) { + return -1; + } + bool ptsInCommon; + if (onlyEndPointsInCommon(opp, start, oppStart, &ptsInCommon)) { + SkASSERT(ptsInCommon); + return 2; + } + bool linear; + if (fPart->hullIntersects(*opp->fPart, &linear)) { + if (!linear) { // check set true if linear + return 1; + } + fIsLinear = true; + fIsLine = fPart->controlsInside(); + return ptsInCommon ? 1 : -1; + } + // hull is not linear; check set true if intersected at the end points + return ((int) ptsInCommon) << 1; // 0 or 2 +} + +// OPTIMIZE ? If at_most_end_pts_in_common detects that one quad is near linear, +// use line intersection to guess a better split than 0.5 +// OPTIMIZE Once at_most_end_pts_in_common detects linear, mark span so all future splits are linear + +int SkTSpan::hullsIntersect(SkTSpan* opp, + bool* start, bool* oppStart) { + if (!fBounds.intersects(opp->fBounds)) { + return 0; + } + int hullSect = this->hullCheck(opp, start, oppStart); + if (hullSect >= 0) { + return hullSect; + } + hullSect = opp->hullCheck(this, oppStart, start); + if (hullSect >= 0) { + return hullSect; + } + return -1; +} + +void SkTSpan::init(const SkTCurve& c) { + fPrev = fNext = nullptr; + fStartT = 0; + fEndT = 1; + fBounded = nullptr; + resetBounds(c); +} + +bool SkTSpan::initBounds(const SkTCurve& c) { + if (SkDoubleIsNaN(fStartT) || SkDoubleIsNaN(fEndT)) { + return false; + } + c.subDivide(fStartT, fEndT, fPart); + fBounds.setBounds(*fPart); + fCoinStart.init(); + fCoinEnd.init(); + fBoundsMax = std::max(fBounds.width(), fBounds.height()); + fCollapsed = fPart->collapsed(); + fHasPerp = false; + fDeleted = false; +#if DEBUG_T_SECT + if (fCollapsed) { + SkDebugf("%s", ""); // for convenient breakpoints + } +#endif + return fBounds.valid(); +} + +bool SkTSpan::linearsIntersect(SkTSpan* span) { + int result = this->linearIntersects(*span->fPart); + if (result <= 1) { + return SkToBool(result); + } + SkASSERT(span->fIsLinear); + result = span->linearIntersects(*fPart); +// SkASSERT(result <= 1); + return SkToBool(result); +} + +double SkTSpan::linearT(const SkDPoint& pt) const { + SkDVector len = this->pointLast() - this->pointFirst(); + return fabs(len.fX) > fabs(len.fY) + ? (pt.fX - this->pointFirst().fX) / len.fX + : (pt.fY - this->pointFirst().fY) / len.fY; +} + +int SkTSpan::linearIntersects(const SkTCurve& q2) const { + // looks like q1 is near-linear + int start = 0, end = fPart->pointLast(); // the outside points are usually the extremes + if (!fPart->controlsInside()) { + double dist = 0; // if there's any question, compute distance to find best outsiders + for (int outer = 0; outer < this->pointCount() - 1; ++outer) { + for (int inner = outer + 1; inner < this->pointCount(); ++inner) { + double test = ((*fPart)[outer] - (*fPart)[inner]).lengthSquared(); + if (dist > test) { + continue; + } + dist = test; + start = outer; + end = inner; + } + } + } + // see if q2 is on one side of the line formed by the extreme points + double origX = (*fPart)[start].fX; + double origY = (*fPart)[start].fY; + double adj = (*fPart)[end].fX - origX; + double opp = (*fPart)[end].fY - origY; + double maxPart = std::max(fabs(adj), fabs(opp)); + double sign = 0; // initialization to shut up warning in release build + for (int n = 0; n < q2.pointCount(); ++n) { + double dx = q2[n].fY - origY; + double dy = q2[n].fX - origX; + double maxVal = std::max(maxPart, std::max(fabs(dx), fabs(dy))); + double test = (q2[n].fY - origY) * adj - (q2[n].fX - origX) * opp; + if (precisely_zero_when_compared_to(test, maxVal)) { + return 1; + } + if (approximately_zero_when_compared_to(test, maxVal)) { + return 3; + } + if (n == 0) { + sign = test; + continue; + } + if (test * sign < 0) { + return 1; + } + } + return 0; +} + +bool SkTSpan::onlyEndPointsInCommon(const SkTSpan* opp, + bool* start, bool* oppStart, bool* ptsInCommon) { + if (opp->pointFirst() == this->pointFirst()) { + *start = *oppStart = true; + } else if (opp->pointFirst() == this->pointLast()) { + *start = false; + *oppStart = true; + } else if (opp->pointLast() == this->pointFirst()) { + *start = true; + *oppStart = false; + } else if (opp->pointLast() == this->pointLast()) { + *start = *oppStart = false; + } else { + *ptsInCommon = false; + return false; + } + *ptsInCommon = true; + const SkDPoint* otherPts[4], * oppOtherPts[4]; +// const SkDPoint* otherPts[this->pointCount() - 1], * oppOtherPts[opp->pointCount() - 1]; + int baseIndex = *start ? 0 : fPart->pointLast(); + fPart->otherPts(baseIndex, otherPts); + opp->fPart->otherPts(*oppStart ? 0 : opp->fPart->pointLast(), oppOtherPts); + const SkDPoint& base = (*fPart)[baseIndex]; + for (int o1 = 0; o1 < this->pointCount() - 1; ++o1) { + SkDVector v1 = *otherPts[o1] - base; + for (int o2 = 0; o2 < opp->pointCount() - 1; ++o2) { + SkDVector v2 = *oppOtherPts[o2] - base; + if (v2.dot(v1) >= 0) { + return false; + } + } + } + return true; +} + +SkTSpan* SkTSpan::oppT(double t) const { + SkTSpanBounded* bounded = fBounded; + while (bounded) { + SkTSpan* test = bounded->fBounded; + if (between(test->fStartT, t, test->fEndT)) { + return test; + } + bounded = bounded->fNext; + } + return nullptr; +} + +bool SkTSpan::removeAllBounded() { + bool deleteSpan = false; + SkTSpanBounded* bounded = fBounded; + while (bounded) { + SkTSpan* opp = bounded->fBounded; + deleteSpan |= opp->removeBounded(this); + bounded = bounded->fNext; + } + return deleteSpan; +} + +bool SkTSpan::removeBounded(const SkTSpan* opp) { + if (fHasPerp) { + bool foundStart = false; + bool foundEnd = false; + SkTSpanBounded* bounded = fBounded; + while (bounded) { + SkTSpan* test = bounded->fBounded; + if (opp != test) { + foundStart |= between(test->fStartT, fCoinStart.perpT(), test->fEndT); + foundEnd |= between(test->fStartT, fCoinEnd.perpT(), test->fEndT); + } + bounded = bounded->fNext; + } + if (!foundStart || !foundEnd) { + fHasPerp = false; + fCoinStart.init(); + fCoinEnd.init(); + } + } + SkTSpanBounded* bounded = fBounded; + SkTSpanBounded* prev = nullptr; + while (bounded) { + SkTSpanBounded* boundedNext = bounded->fNext; + if (opp == bounded->fBounded) { + if (prev) { + prev->fNext = boundedNext; + return false; + } else { + fBounded = boundedNext; + return fBounded == nullptr; + } + } + prev = bounded; + bounded = boundedNext; + } + SkOPASSERT(0); + return false; +} + +bool SkTSpan::splitAt(SkTSpan* work, double t, SkArenaAlloc* heap) { + fStartT = t; + fEndT = work->fEndT; + if (fStartT == fEndT) { + fCollapsed = true; + return false; + } + work->fEndT = t; + if (work->fStartT == work->fEndT) { + work->fCollapsed = true; + return false; + } + fPrev = work; + fNext = work->fNext; + fIsLinear = work->fIsLinear; + fIsLine = work->fIsLine; + + work->fNext = this; + if (fNext) { + fNext->fPrev = this; + } + this->validate(); + SkTSpanBounded* bounded = work->fBounded; + fBounded = nullptr; + while (bounded) { + this->addBounded(bounded->fBounded, heap); + bounded = bounded->fNext; + } + bounded = fBounded; + while (bounded) { + bounded->fBounded->addBounded(this, heap); + bounded = bounded->fNext; + } + return true; +} + +void SkTSpan::validate() const { +#if DEBUG_VALIDATE + SkASSERT(this != fPrev); + SkASSERT(this != fNext); + SkASSERT(fNext == nullptr || fNext != fPrev); + SkASSERT(fNext == nullptr || this == fNext->fPrev); + SkASSERT(fPrev == nullptr || this == fPrev->fNext); + this->validateBounded(); +#endif +#if DEBUG_T_SECT + SkASSERT(fBounds.width() || fBounds.height() || fCollapsed); + SkASSERT(fBoundsMax == std::max(fBounds.width(), fBounds.height()) || fCollapsed == 0xFF); + SkASSERT(0 <= fStartT); + SkASSERT(fEndT <= 1); + SkASSERT(fStartT <= fEndT); + SkASSERT(fBounded || fCollapsed == 0xFF); + if (fHasPerp) { + if (fCoinStart.isMatch()) { + validatePerpT(fCoinStart.perpT()); + validatePerpPt(fCoinStart.perpT(), fCoinStart.perpPt()); + } + if (fCoinEnd.isMatch()) { + validatePerpT(fCoinEnd.perpT()); + validatePerpPt(fCoinEnd.perpT(), fCoinEnd.perpPt()); + } + } +#endif +} + +void SkTSpan::validateBounded() const { +#if DEBUG_VALIDATE + const SkTSpanBounded* testBounded = fBounded; + while (testBounded) { + SkDEBUGCODE(const SkTSpan* overlap = testBounded->fBounded); + SkASSERT(!overlap->fDeleted); +#if DEBUG_T_SECT + SkASSERT(((this->debugID() ^ overlap->debugID()) & 1) == 1); + SkASSERT(overlap->findOppSpan(this)); +#endif + testBounded = testBounded->fNext; + } +#endif +} + +void SkTSpan::validatePerpT(double oppT) const { + const SkTSpanBounded* testBounded = fBounded; + while (testBounded) { + const SkTSpan* overlap = testBounded->fBounded; + if (precisely_between(overlap->fStartT, oppT, overlap->fEndT)) { + return; + } + testBounded = testBounded->fNext; + } + SkASSERT(0); +} + +void SkTSpan::validatePerpPt(double t, const SkDPoint& pt) const { + SkASSERT(fDebugSect->fOppSect->fCurve.ptAtT(t) == pt); +} + +SkTSect::SkTSect(const SkTCurve& c + SkDEBUGPARAMS(SkOpGlobalState* debugGlobalState) + PATH_OPS_DEBUG_T_SECT_PARAMS(int id)) + : fCurve(c) + , fHeap(sizeof(SkTSpan) * 4) + , fCoincident(nullptr) + , fDeleted(nullptr) + , fActiveCount(0) + , fHung(false) + SkDEBUGPARAMS(fDebugGlobalState(debugGlobalState)) + PATH_OPS_DEBUG_T_SECT_PARAMS(fID(id)) + PATH_OPS_DEBUG_T_SECT_PARAMS(fDebugCount(0)) + PATH_OPS_DEBUG_T_SECT_PARAMS(fDebugAllocatedCount(0)) +{ + this->resetRemovedEnds(); + fHead = this->addOne(); + SkDEBUGCODE(fHead->debugSetGlobalState(debugGlobalState)); + fHead->init(c); +} + +SkTSpan* SkTSect::addOne() { + SkTSpan* result; + if (fDeleted) { + result = fDeleted; + fDeleted = result->fNext; + } else { + result = fHeap.make(fCurve, fHeap); +#if DEBUG_T_SECT + ++fDebugAllocatedCount; +#endif + } + result->reset(); + result->fHasPerp = false; + result->fDeleted = false; + ++fActiveCount; + PATH_OPS_DEBUG_T_SECT_CODE(result->fID = fDebugCount++ * 2 + fID); + SkDEBUGCODE(result->fDebugSect = this); +#ifdef SK_DEBUG + result->debugInit(fCurve, fHeap); + result->fCoinStart.debugInit(); + result->fCoinEnd.debugInit(); + result->fPrev = result->fNext = nullptr; + result->fBounds.debugInit(); + result->fStartT = result->fEndT = result->fBoundsMax = SK_ScalarNaN; + result->fCollapsed = result->fIsLinear = result->fIsLine = 0xFF; +#endif + return result; +} + +bool SkTSect::binarySearchCoin(SkTSect* sect2, double tStart, + double tStep, double* resultT, double* oppT, SkTSpan** oppFirst) { + SkTSpan work(fCurve, fHeap); + double result = work.fStartT = work.fEndT = tStart; + SkDEBUGCODE(work.fDebugSect = this); + SkDPoint last = fCurve.ptAtT(tStart); + SkDPoint oppPt; + bool flip = false; + bool contained = false; + bool down = tStep < 0; + const SkTCurve& opp = sect2->fCurve; + do { + tStep *= 0.5; + work.fStartT += tStep; + if (flip) { + tStep = -tStep; + flip = false; + } + work.initBounds(fCurve); + if (work.fCollapsed) { + return false; + } + if (last.approximatelyEqual(work.pointFirst())) { + break; + } + last = work.pointFirst(); + work.fCoinStart.setPerp(fCurve, work.fStartT, last, opp); + if (work.fCoinStart.isMatch()) { +#if DEBUG_T_SECT + work.validatePerpPt(work.fCoinStart.perpT(), work.fCoinStart.perpPt()); +#endif + double oppTTest = work.fCoinStart.perpT(); + if (sect2->fHead->contains(oppTTest)) { + *oppT = oppTTest; + oppPt = work.fCoinStart.perpPt(); + contained = true; + if (down ? result <= work.fStartT : result >= work.fStartT) { + *oppFirst = nullptr; // signal caller to fail + return false; + } + result = work.fStartT; + continue; + } + } + tStep = -tStep; + flip = true; + } while (true); + if (!contained) { + return false; + } + if (last.approximatelyEqual(fCurve[0])) { + result = 0; + } else if (last.approximatelyEqual(this->pointLast())) { + result = 1; + } + if (oppPt.approximatelyEqual(opp[0])) { + *oppT = 0; + } else if (oppPt.approximatelyEqual(sect2->pointLast())) { + *oppT = 1; + } + *resultT = result; + return true; +} + +// OPTIMIZE ? keep a sorted list of sizes in the form of a doubly-linked list in quad span +// so that each quad sect has a pointer to the largest, and can update it as spans +// are split + +SkTSpan* SkTSect::boundsMax() { + SkTSpan* test = fHead; + SkTSpan* largest = fHead; + bool lCollapsed = largest->fCollapsed; + int safetyNet = 10000; + while ((test = test->fNext)) { + if (!--safetyNet) { + fHung = true; + return nullptr; + } + bool tCollapsed = test->fCollapsed; + if ((lCollapsed && !tCollapsed) || (lCollapsed == tCollapsed && + largest->fBoundsMax < test->fBoundsMax)) { + largest = test; + lCollapsed = test->fCollapsed; + } + } + return largest; +} + +bool SkTSect::coincidentCheck(SkTSect* sect2) { + SkTSpan* first = fHead; + if (!first) { + return false; + } + SkTSpan* last, * next; + do { + int consecutive = this->countConsecutiveSpans(first, &last); + next = last->fNext; + if (consecutive < COINCIDENT_SPAN_COUNT) { + continue; + } + this->validate(); + sect2->validate(); + this->computePerpendiculars(sect2, first, last); + this->validate(); + sect2->validate(); + // check to see if a range of points are on the curve + SkTSpan* coinStart = first; + do { + bool success = this->extractCoincident(sect2, coinStart, last, &coinStart); + if (!success) { + return false; + } + } while (coinStart && !last->fDeleted); + if (!fHead || !sect2->fHead) { + break; + } + if (!next || next->fDeleted) { + break; + } + } while ((first = next)); + return true; +} + +void SkTSect::coincidentForce(SkTSect* sect2, + double start1s, double start1e) { + SkTSpan* first = fHead; + SkTSpan* last = this->tail(); + SkTSpan* oppFirst = sect2->fHead; + SkTSpan* oppLast = sect2->tail(); + if (!last || !oppLast) { + return; + } + bool deleteEmptySpans = this->updateBounded(first, last, oppFirst); + deleteEmptySpans |= sect2->updateBounded(oppFirst, oppLast, first); + this->removeSpanRange(first, last); + sect2->removeSpanRange(oppFirst, oppLast); + first->fStartT = start1s; + first->fEndT = start1e; + first->resetBounds(fCurve); + first->fCoinStart.setPerp(fCurve, start1s, fCurve[0], sect2->fCurve); + first->fCoinEnd.setPerp(fCurve, start1e, this->pointLast(), sect2->fCurve); + bool oppMatched = first->fCoinStart.perpT() < first->fCoinEnd.perpT(); + double oppStartT = first->fCoinStart.perpT() == -1 ? 0 : std::max(0., first->fCoinStart.perpT()); + double oppEndT = first->fCoinEnd.perpT() == -1 ? 1 : std::min(1., first->fCoinEnd.perpT()); + if (!oppMatched) { + using std::swap; + swap(oppStartT, oppEndT); + } + oppFirst->fStartT = oppStartT; + oppFirst->fEndT = oppEndT; + oppFirst->resetBounds(sect2->fCurve); + this->removeCoincident(first, false); + sect2->removeCoincident(oppFirst, true); + if (deleteEmptySpans) { + this->deleteEmptySpans(); + sect2->deleteEmptySpans(); + } +} + +bool SkTSect::coincidentHasT(double t) { + SkTSpan* test = fCoincident; + while (test) { + if (between(test->fStartT, t, test->fEndT)) { + return true; + } + test = test->fNext; + } + return false; +} + +int SkTSect::collapsed() const { + int result = 0; + const SkTSpan* test = fHead; + while (test) { + if (test->fCollapsed) { + ++result; + } + test = test->next(); + } + return result; +} + +void SkTSect::computePerpendiculars(SkTSect* sect2, + SkTSpan* first, SkTSpan* last) { + if (!last) { + return; + } + const SkTCurve& opp = sect2->fCurve; + SkTSpan* work = first; + SkTSpan* prior = nullptr; + do { + if (!work->fHasPerp && !work->fCollapsed) { + if (prior) { + work->fCoinStart = prior->fCoinEnd; + } else { + work->fCoinStart.setPerp(fCurve, work->fStartT, work->pointFirst(), opp); + } + if (work->fCoinStart.isMatch()) { + double perpT = work->fCoinStart.perpT(); + if (sect2->coincidentHasT(perpT)) { + work->fCoinStart.init(); + } else { + sect2->addForPerp(work, perpT); + } + } + work->fCoinEnd.setPerp(fCurve, work->fEndT, work->pointLast(), opp); + if (work->fCoinEnd.isMatch()) { + double perpT = work->fCoinEnd.perpT(); + if (sect2->coincidentHasT(perpT)) { + work->fCoinEnd.init(); + } else { + sect2->addForPerp(work, perpT); + } + } + work->fHasPerp = true; + } + if (work == last) { + break; + } + prior = work; + work = work->fNext; + SkASSERT(work); + } while (true); +} + +int SkTSect::countConsecutiveSpans(SkTSpan* first, + SkTSpan** lastPtr) const { + int consecutive = 1; + SkTSpan* last = first; + do { + SkTSpan* next = last->fNext; + if (!next) { + break; + } + if (next->fStartT > last->fEndT) { + break; + } + ++consecutive; + last = next; + } while (true); + *lastPtr = last; + return consecutive; +} + +bool SkTSect::hasBounded(const SkTSpan* span) const { + const SkTSpan* test = fHead; + if (!test) { + return false; + } + do { + if (test->findOppSpan(span)) { + return true; + } + } while ((test = test->next())); + return false; +} + +bool SkTSect::deleteEmptySpans() { + SkTSpan* test; + SkTSpan* next = fHead; + int safetyHatch = 1000; + while ((test = next)) { + next = test->fNext; + if (!test->fBounded) { + if (!this->removeSpan(test)) { + return false; + } + } + if (--safetyHatch < 0) { + return false; + } + } + return true; +} + +bool SkTSect::extractCoincident( + SkTSect* sect2, + SkTSpan* first, SkTSpan* last, + SkTSpan** result) { + first = findCoincidentRun(first, &last); + if (!first || !last) { + *result = nullptr; + return true; + } + // march outwards to find limit of coincidence from here to previous and next spans + double startT = first->fStartT; + double oppStartT SK_INIT_TO_AVOID_WARNING; + double oppEndT SK_INIT_TO_AVOID_WARNING; + SkTSpan* prev = first->fPrev; + SkASSERT(first->fCoinStart.isMatch()); + SkTSpan* oppFirst = first->findOppT(first->fCoinStart.perpT()); + SkOPASSERT(last->fCoinEnd.isMatch()); + bool oppMatched = first->fCoinStart.perpT() < first->fCoinEnd.perpT(); + double coinStart; + SkDEBUGCODE(double coinEnd); + SkTSpan* cutFirst; + if (prev && prev->fEndT == startT + && this->binarySearchCoin(sect2, startT, prev->fStartT - startT, &coinStart, + &oppStartT, &oppFirst) + && prev->fStartT < coinStart && coinStart < startT + && (cutFirst = prev->oppT(oppStartT))) { + oppFirst = cutFirst; + first = this->addSplitAt(prev, coinStart); + first->markCoincident(); + prev->fCoinEnd.markCoincident(); + if (oppFirst->fStartT < oppStartT && oppStartT < oppFirst->fEndT) { + SkTSpan* oppHalf = sect2->addSplitAt(oppFirst, oppStartT); + if (oppMatched) { + oppFirst->fCoinEnd.markCoincident(); + oppHalf->markCoincident(); + oppFirst = oppHalf; + } else { + oppFirst->markCoincident(); + oppHalf->fCoinStart.markCoincident(); + } + } + } else { + if (!oppFirst) { + return false; + } + SkDEBUGCODE(coinStart = first->fStartT); + SkDEBUGCODE(oppStartT = oppMatched ? oppFirst->fStartT : oppFirst->fEndT); + } + // FIXME: incomplete : if we're not at the end, find end of coin + SkTSpan* oppLast; + SkOPASSERT(last->fCoinEnd.isMatch()); + oppLast = last->findOppT(last->fCoinEnd.perpT()); + SkDEBUGCODE(coinEnd = last->fEndT); +#ifdef SK_DEBUG + if (!this->globalState() || !this->globalState()->debugSkipAssert()) { + oppEndT = oppMatched ? oppLast->fEndT : oppLast->fStartT; + } +#endif + if (!oppMatched) { + using std::swap; + swap(oppFirst, oppLast); + swap(oppStartT, oppEndT); + } + SkOPASSERT(oppStartT < oppEndT); + SkASSERT(coinStart == first->fStartT); + SkASSERT(coinEnd == last->fEndT); + if (!oppFirst) { + *result = nullptr; + return true; + } + SkOPASSERT(oppStartT == oppFirst->fStartT); + if (!oppLast) { + *result = nullptr; + return true; + } + SkOPASSERT(oppEndT == oppLast->fEndT); + // reduce coincident runs to single entries + this->validate(); + sect2->validate(); + bool deleteEmptySpans = this->updateBounded(first, last, oppFirst); + deleteEmptySpans |= sect2->updateBounded(oppFirst, oppLast, first); + this->removeSpanRange(first, last); + sect2->removeSpanRange(oppFirst, oppLast); + first->fEndT = last->fEndT; + first->resetBounds(this->fCurve); + first->fCoinStart.setPerp(fCurve, first->fStartT, first->pointFirst(), sect2->fCurve); + first->fCoinEnd.setPerp(fCurve, first->fEndT, first->pointLast(), sect2->fCurve); + oppStartT = first->fCoinStart.perpT(); + oppEndT = first->fCoinEnd.perpT(); + if (between(0, oppStartT, 1) && between(0, oppEndT, 1)) { + if (!oppMatched) { + using std::swap; + swap(oppStartT, oppEndT); + } + oppFirst->fStartT = oppStartT; + oppFirst->fEndT = oppEndT; + oppFirst->resetBounds(sect2->fCurve); + } + this->validateBounded(); + sect2->validateBounded(); + last = first->fNext; + if (!this->removeCoincident(first, false)) { + return false; + } + if (!sect2->removeCoincident(oppFirst, true)) { + return false; + } + if (deleteEmptySpans) { + if (!this->deleteEmptySpans() || !sect2->deleteEmptySpans()) { + *result = nullptr; + return false; + } + } + this->validate(); + sect2->validate(); + *result = last && !last->fDeleted && fHead && sect2->fHead ? last : nullptr; + return true; +} + +SkTSpan* SkTSect::findCoincidentRun( + SkTSpan* first, SkTSpan** lastPtr) { + SkTSpan* work = first; + SkTSpan* lastCandidate = nullptr; + first = nullptr; + // find the first fully coincident span + do { + if (work->fCoinStart.isMatch()) { +#if DEBUG_T_SECT + work->validatePerpT(work->fCoinStart.perpT()); + work->validatePerpPt(work->fCoinStart.perpT(), work->fCoinStart.perpPt()); +#endif + SkOPASSERT(work->hasOppT(work->fCoinStart.perpT())); + if (!work->fCoinEnd.isMatch()) { + break; + } + lastCandidate = work; + if (!first) { + first = work; + } + } else if (first && work->fCollapsed) { + *lastPtr = lastCandidate; + return first; + } else { + lastCandidate = nullptr; + SkOPASSERT(!first); + } + if (work == *lastPtr) { + return first; + } + work = work->fNext; + if (!work) { + return nullptr; + } + } while (true); + if (lastCandidate) { + *lastPtr = lastCandidate; + } + return first; +} + +int SkTSect::intersects(SkTSpan* span, + SkTSect* opp, + SkTSpan* oppSpan, int* oppResult) { + bool spanStart, oppStart; + int hullResult = span->hullsIntersect(oppSpan, &spanStart, &oppStart); + if (hullResult >= 0) { + if (hullResult == 2) { // hulls have one point in common + if (!span->fBounded || !span->fBounded->fNext) { + SkASSERT(!span->fBounded || span->fBounded->fBounded == oppSpan); + if (spanStart) { + span->fEndT = span->fStartT; + } else { + span->fStartT = span->fEndT; + } + } else { + hullResult = 1; + } + if (!oppSpan->fBounded || !oppSpan->fBounded->fNext) { + if (oppSpan->fBounded && oppSpan->fBounded->fBounded != span) { + return 0; + } + if (oppStart) { + oppSpan->fEndT = oppSpan->fStartT; + } else { + oppSpan->fStartT = oppSpan->fEndT; + } + *oppResult = 2; + } else { + *oppResult = 1; + } + } else { + *oppResult = 1; + } + return hullResult; + } + if (span->fIsLine && oppSpan->fIsLine) { + SkIntersections i; + int sects = this->linesIntersect(span, opp, oppSpan, &i); + if (sects == 2) { + return *oppResult = 1; + } + if (!sects) { + return -1; + } + this->removedEndCheck(span); + span->fStartT = span->fEndT = i[0][0]; + opp->removedEndCheck(oppSpan); + oppSpan->fStartT = oppSpan->fEndT = i[1][0]; + return *oppResult = 2; + } + if (span->fIsLinear || oppSpan->fIsLinear) { + return *oppResult = (int) span->linearsIntersect(oppSpan); + } + return *oppResult = 1; +} + +template +static bool is_parallel(const SkDLine& thisLine, const SkTCurve& opp) { + if (!opp.IsConic()) { + return false; // FIXME : breaks a lot of stuff now + } + int finds = 0; + SkDLine thisPerp; + thisPerp.fPts[0].fX = thisLine.fPts[1].fX + (thisLine.fPts[1].fY - thisLine.fPts[0].fY); + thisPerp.fPts[0].fY = thisLine.fPts[1].fY + (thisLine.fPts[0].fX - thisLine.fPts[1].fX); + thisPerp.fPts[1] = thisLine.fPts[1]; + SkIntersections perpRayI; + perpRayI.intersectRay(opp, thisPerp); + for (int pIndex = 0; pIndex < perpRayI.used(); ++pIndex) { + finds += perpRayI.pt(pIndex).approximatelyEqual(thisPerp.fPts[1]); + } + thisPerp.fPts[1].fX = thisLine.fPts[0].fX + (thisLine.fPts[1].fY - thisLine.fPts[0].fY); + thisPerp.fPts[1].fY = thisLine.fPts[0].fY + (thisLine.fPts[0].fX - thisLine.fPts[1].fX); + thisPerp.fPts[0] = thisLine.fPts[0]; + perpRayI.intersectRay(opp, thisPerp); + for (int pIndex = 0; pIndex < perpRayI.used(); ++pIndex) { + finds += perpRayI.pt(pIndex).approximatelyEqual(thisPerp.fPts[0]); + } + return finds >= 2; +} + +// while the intersection points are sufficiently far apart: +// construct the tangent lines from the intersections +// find the point where the tangent line intersects the opposite curve + +int SkTSect::linesIntersect(SkTSpan* span, + SkTSect* opp, + SkTSpan* oppSpan, SkIntersections* i) { + SkIntersections thisRayI SkDEBUGCODE((span->fDebugGlobalState)); + SkIntersections oppRayI SkDEBUGCODE((span->fDebugGlobalState)); + SkDLine thisLine = {{ span->pointFirst(), span->pointLast() }}; + SkDLine oppLine = {{ oppSpan->pointFirst(), oppSpan->pointLast() }}; + int loopCount = 0; + double bestDistSq = DBL_MAX; + if (!thisRayI.intersectRay(opp->fCurve, thisLine)) { + return 0; + } + if (!oppRayI.intersectRay(this->fCurve, oppLine)) { + return 0; + } + // if the ends of each line intersect the opposite curve, the lines are coincident + if (thisRayI.used() > 1) { + int ptMatches = 0; + for (int tIndex = 0; tIndex < thisRayI.used(); ++tIndex) { + for (int lIndex = 0; lIndex < (int) std::size(thisLine.fPts); ++lIndex) { + ptMatches += thisRayI.pt(tIndex).approximatelyEqual(thisLine.fPts[lIndex]); + } + } + if (ptMatches == 2 || is_parallel(thisLine, opp->fCurve)) { + return 2; + } + } + if (oppRayI.used() > 1) { + int ptMatches = 0; + for (int oIndex = 0; oIndex < oppRayI.used(); ++oIndex) { + for (int lIndex = 0; lIndex < (int) std::size(oppLine.fPts); ++lIndex) { + ptMatches += oppRayI.pt(oIndex).approximatelyEqual(oppLine.fPts[lIndex]); + } + } + if (ptMatches == 2|| is_parallel(oppLine, this->fCurve)) { + return 2; + } + } + do { + // pick the closest pair of points + double closest = DBL_MAX; + int closeIndex SK_INIT_TO_AVOID_WARNING; + int oppCloseIndex SK_INIT_TO_AVOID_WARNING; + for (int index = 0; index < oppRayI.used(); ++index) { + if (!roughly_between(span->fStartT, oppRayI[0][index], span->fEndT)) { + continue; + } + for (int oIndex = 0; oIndex < thisRayI.used(); ++oIndex) { + if (!roughly_between(oppSpan->fStartT, thisRayI[0][oIndex], oppSpan->fEndT)) { + continue; + } + double distSq = thisRayI.pt(index).distanceSquared(oppRayI.pt(oIndex)); + if (closest > distSq) { + closest = distSq; + closeIndex = index; + oppCloseIndex = oIndex; + } + } + } + if (closest == DBL_MAX) { + break; + } + const SkDPoint& oppIPt = thisRayI.pt(oppCloseIndex); + const SkDPoint& iPt = oppRayI.pt(closeIndex); + if (between(span->fStartT, oppRayI[0][closeIndex], span->fEndT) + && between(oppSpan->fStartT, thisRayI[0][oppCloseIndex], oppSpan->fEndT) + && oppIPt.approximatelyEqual(iPt)) { + i->merge(oppRayI, closeIndex, thisRayI, oppCloseIndex); + return i->used(); + } + double distSq = oppIPt.distanceSquared(iPt); + if (bestDistSq < distSq || ++loopCount > 5) { + return 0; + } + bestDistSq = distSq; + double oppStart = oppRayI[0][closeIndex]; + thisLine[0] = fCurve.ptAtT(oppStart); + thisLine[1] = thisLine[0] + fCurve.dxdyAtT(oppStart); + if (!thisRayI.intersectRay(opp->fCurve, thisLine)) { + break; + } + double start = thisRayI[0][oppCloseIndex]; + oppLine[0] = opp->fCurve.ptAtT(start); + oppLine[1] = oppLine[0] + opp->fCurve.dxdyAtT(start); + if (!oppRayI.intersectRay(this->fCurve, oppLine)) { + break; + } + } while (true); + // convergence may fail if the curves are nearly coincident + SkTCoincident oCoinS, oCoinE; + oCoinS.setPerp(opp->fCurve, oppSpan->fStartT, oppSpan->pointFirst(), fCurve); + oCoinE.setPerp(opp->fCurve, oppSpan->fEndT, oppSpan->pointLast(), fCurve); + double tStart = oCoinS.perpT(); + double tEnd = oCoinE.perpT(); + bool swap = tStart > tEnd; + if (swap) { + using std::swap; + swap(tStart, tEnd); + } + tStart = std::max(tStart, span->fStartT); + tEnd = std::min(tEnd, span->fEndT); + if (tStart > tEnd) { + return 0; + } + SkDVector perpS, perpE; + if (tStart == span->fStartT) { + SkTCoincident coinS; + coinS.setPerp(fCurve, span->fStartT, span->pointFirst(), opp->fCurve); + perpS = span->pointFirst() - coinS.perpPt(); + } else if (swap) { + perpS = oCoinE.perpPt() - oppSpan->pointLast(); + } else { + perpS = oCoinS.perpPt() - oppSpan->pointFirst(); + } + if (tEnd == span->fEndT) { + SkTCoincident coinE; + coinE.setPerp(fCurve, span->fEndT, span->pointLast(), opp->fCurve); + perpE = span->pointLast() - coinE.perpPt(); + } else if (swap) { + perpE = oCoinS.perpPt() - oppSpan->pointFirst(); + } else { + perpE = oCoinE.perpPt() - oppSpan->pointLast(); + } + if (perpS.dot(perpE) >= 0) { + return 0; + } + SkTCoincident coinW; + double workT = tStart; + double tStep = tEnd - tStart; + SkDPoint workPt; + do { + tStep *= 0.5; + if (precisely_zero(tStep)) { + return 0; + } + workT += tStep; + workPt = fCurve.ptAtT(workT); + coinW.setPerp(fCurve, workT, workPt, opp->fCurve); + double perpT = coinW.perpT(); + if (coinW.isMatch() ? !between(oppSpan->fStartT, perpT, oppSpan->fEndT) : perpT < 0) { + continue; + } + SkDVector perpW = workPt - coinW.perpPt(); + if ((perpS.dot(perpW) >= 0) == (tStep < 0)) { + tStep = -tStep; + } + if (workPt.approximatelyEqual(coinW.perpPt())) { + break; + } + } while (true); + double oppTTest = coinW.perpT(); + if (!opp->fHead->contains(oppTTest)) { + return 0; + } + i->setMax(1); + i->insert(workT, oppTTest, workPt); + return 1; +} + +bool SkTSect::markSpanGone(SkTSpan* span) { + if (--fActiveCount < 0) { + return false; + } + span->fNext = fDeleted; + fDeleted = span; + SkOPASSERT(!span->fDeleted); + span->fDeleted = true; + return true; +} + +bool SkTSect::matchedDirection(double t, const SkTSect* sect2, + double t2) const { + SkDVector dxdy = this->fCurve.dxdyAtT(t); + SkDVector dxdy2 = sect2->fCurve.dxdyAtT(t2); + return dxdy.dot(dxdy2) >= 0; +} + +void SkTSect::matchedDirCheck(double t, const SkTSect* sect2, + double t2, bool* calcMatched, bool* oppMatched) const { + if (*calcMatched) { + SkASSERT(*oppMatched == this->matchedDirection(t, sect2, t2)); + } else { + *oppMatched = this->matchedDirection(t, sect2, t2); + *calcMatched = true; + } +} + +void SkTSect::mergeCoincidence(SkTSect* sect2) { + double smallLimit = 0; + do { + // find the smallest unprocessed span + SkTSpan* smaller = nullptr; + SkTSpan* test = fCoincident; + do { + if (!test) { + return; + } + if (test->fStartT < smallLimit) { + continue; + } + if (smaller && smaller->fEndT < test->fStartT) { + continue; + } + smaller = test; + } while ((test = test->fNext)); + if (!smaller) { + return; + } + smallLimit = smaller->fEndT; + // find next larger span + SkTSpan* prior = nullptr; + SkTSpan* larger = nullptr; + SkTSpan* largerPrior = nullptr; + test = fCoincident; + do { + if (test->fStartT < smaller->fEndT) { + continue; + } + SkOPASSERT(test->fStartT != smaller->fEndT); + if (larger && larger->fStartT < test->fStartT) { + continue; + } + largerPrior = prior; + larger = test; + } while ((void) (prior = test), (test = test->fNext)); + if (!larger) { + continue; + } + // check middle t value to see if it is coincident as well + double midT = (smaller->fEndT + larger->fStartT) / 2; + SkDPoint midPt = fCurve.ptAtT(midT); + SkTCoincident coin; + coin.setPerp(fCurve, midT, midPt, sect2->fCurve); + if (coin.isMatch()) { + smaller->fEndT = larger->fEndT; + smaller->fCoinEnd = larger->fCoinEnd; + if (largerPrior) { + largerPrior->fNext = larger->fNext; + largerPrior->validate(); + } else { + fCoincident = larger->fNext; + } + } + } while (true); +} + +SkTSpan* SkTSect::prev( + SkTSpan* span) const { + SkTSpan* result = nullptr; + SkTSpan* test = fHead; + while (span != test) { + result = test; + test = test->fNext; + SkASSERT(test); + } + return result; +} + +void SkTSect::recoverCollapsed() { + SkTSpan* deleted = fDeleted; + while (deleted) { + SkTSpan* delNext = deleted->fNext; + if (deleted->fCollapsed) { + SkTSpan** spanPtr = &fHead; + while (*spanPtr && (*spanPtr)->fEndT <= deleted->fStartT) { + spanPtr = &(*spanPtr)->fNext; + } + deleted->fNext = *spanPtr; + *spanPtr = deleted; + } + deleted = delNext; + } +} + +void SkTSect::removeAllBut(const SkTSpan* keep, + SkTSpan* span, SkTSect* opp) { + const SkTSpanBounded* testBounded = span->fBounded; + while (testBounded) { + SkTSpan* bounded = testBounded->fBounded; + const SkTSpanBounded* next = testBounded->fNext; + // may have been deleted when opp did 'remove all but' + if (bounded != keep && !bounded->fDeleted) { + SkAssertResult(SkDEBUGCODE(!) span->removeBounded(bounded)); + if (bounded->removeBounded(span)) { + opp->removeSpan(bounded); + } + } + testBounded = next; + } + SkASSERT(!span->fDeleted); + SkASSERT(span->findOppSpan(keep)); + SkASSERT(keep->findOppSpan(span)); +} + +bool SkTSect::removeByPerpendicular(SkTSect* opp) { + SkTSpan* test = fHead; + SkTSpan* next; + do { + next = test->fNext; + if (test->fCoinStart.perpT() < 0 || test->fCoinEnd.perpT() < 0) { + continue; + } + SkDVector startV = test->fCoinStart.perpPt() - test->pointFirst(); + SkDVector endV = test->fCoinEnd.perpPt() - test->pointLast(); +#if DEBUG_T_SECT + SkDebugf("%s startV=(%1.9g,%1.9g) endV=(%1.9g,%1.9g) dot=%1.9g\n", __FUNCTION__, + startV.fX, startV.fY, endV.fX, endV.fY, startV.dot(endV)); +#endif + if (startV.dot(endV) <= 0) { + continue; + } + if (!this->removeSpans(test, opp)) { + return false; + } + } while ((test = next)); + return true; +} + +bool SkTSect::removeCoincident(SkTSpan* span, bool isBetween) { + if (!this->unlinkSpan(span)) { + return false; + } + if (isBetween || between(0, span->fCoinStart.perpT(), 1)) { + --fActiveCount; + span->fNext = fCoincident; + fCoincident = span; + } else { + this->markSpanGone(span); + } + return true; +} + +void SkTSect::removedEndCheck(SkTSpan* span) { + if (!span->fStartT) { + fRemovedStartT = true; + } + if (1 == span->fEndT) { + fRemovedEndT = true; + } +} + +bool SkTSect::removeSpan(SkTSpan* span) {\ + this->removedEndCheck(span); + if (!this->unlinkSpan(span)) { + return false; + } + return this->markSpanGone(span); +} + +void SkTSect::removeSpanRange(SkTSpan* first, + SkTSpan* last) { + if (first == last) { + return; + } + SkTSpan* span = first; + SkASSERT(span); + SkTSpan* final = last->fNext; + SkTSpan* next = span->fNext; + while ((span = next) && span != final) { + next = span->fNext; + this->markSpanGone(span); + } + if (final) { + final->fPrev = first; + } + first->fNext = final; + // world may not be ready for validation here + first->validate(); +} + +bool SkTSect::removeSpans(SkTSpan* span, + SkTSect* opp) { + SkTSpanBounded* bounded = span->fBounded; + while (bounded) { + SkTSpan* spanBounded = bounded->fBounded; + SkTSpanBounded* next = bounded->fNext; + if (span->removeBounded(spanBounded)) { // shuffles last into position 0 + this->removeSpan(span); + } + if (spanBounded->removeBounded(span)) { + opp->removeSpan(spanBounded); + } + if (span->fDeleted && opp->hasBounded(span)) { + return false; + } + bounded = next; + } + return true; +} + +SkTSpan* SkTSect::spanAtT(double t, + SkTSpan** priorSpan) { + SkTSpan* test = fHead; + SkTSpan* prev = nullptr; + while (test && test->fEndT < t) { + prev = test; + test = test->fNext; + } + *priorSpan = prev; + return test && test->fStartT <= t ? test : nullptr; +} + +SkTSpan* SkTSect::tail() { + SkTSpan* result = fHead; + SkTSpan* next = fHead; + int safetyNet = 100000; + while ((next = next->fNext)) { + if (!--safetyNet) { + return nullptr; + } + if (next->fEndT > result->fEndT) { + result = next; + } + } + return result; +} + +/* Each span has a range of opposite spans it intersects. After the span is split in two, + adjust the range to its new size */ + +bool SkTSect::trim(SkTSpan* span, + SkTSect* opp) { + FAIL_IF(!span->initBounds(fCurve)); + const SkTSpanBounded* testBounded = span->fBounded; + while (testBounded) { + SkTSpan* test = testBounded->fBounded; + const SkTSpanBounded* next = testBounded->fNext; + int oppSects, sects = this->intersects(span, opp, test, &oppSects); + if (sects >= 1) { + if (oppSects == 2) { + test->initBounds(opp->fCurve); + opp->removeAllBut(span, test, this); + } + if (sects == 2) { + span->initBounds(fCurve); + this->removeAllBut(test, span, opp); + return true; + } + } else { + if (span->removeBounded(test)) { + this->removeSpan(span); + } + if (test->removeBounded(span)) { + opp->removeSpan(test); + } + } + testBounded = next; + } + return true; +} + +bool SkTSect::unlinkSpan(SkTSpan* span) { + SkTSpan* prev = span->fPrev; + SkTSpan* next = span->fNext; + if (prev) { + prev->fNext = next; + if (next) { + next->fPrev = prev; + if (next->fStartT > next->fEndT) { + return false; + } + // world may not be ready for validate here + next->validate(); + } + } else { + fHead = next; + if (next) { + next->fPrev = nullptr; + } + } + return true; +} + +bool SkTSect::updateBounded(SkTSpan* first, + SkTSpan* last, SkTSpan* oppFirst) { + SkTSpan* test = first; + const SkTSpan* final = last->next(); + bool deleteSpan = false; + do { + deleteSpan |= test->removeAllBounded(); + } while ((test = test->fNext) != final && test); + first->fBounded = nullptr; + first->addBounded(oppFirst, &fHeap); + // cannot call validate until remove span range is called + return deleteSpan; +} + +void SkTSect::validate() const { +#if DEBUG_VALIDATE + int count = 0; + double last = 0; + if (fHead) { + const SkTSpan* span = fHead; + SkASSERT(!span->fPrev); + const SkTSpan* next; + do { + span->validate(); + SkASSERT(span->fStartT >= last); + last = span->fEndT; + ++count; + next = span->fNext; + SkASSERT(next != span); + } while ((span = next) != nullptr); + } + SkASSERT(count == fActiveCount); +#endif +#if DEBUG_T_SECT + SkASSERT(fActiveCount <= fDebugAllocatedCount); + int deletedCount = 0; + const SkTSpan* deleted = fDeleted; + while (deleted) { + ++deletedCount; + deleted = deleted->fNext; + } + const SkTSpan* coincident = fCoincident; + while (coincident) { + ++deletedCount; + coincident = coincident->fNext; + } + SkASSERT(fActiveCount + deletedCount == fDebugAllocatedCount); +#endif +} + +void SkTSect::validateBounded() const { +#if DEBUG_VALIDATE + if (!fHead) { + return; + } + const SkTSpan* span = fHead; + do { + span->validateBounded(); + } while ((span = span->fNext) != nullptr); +#endif +} + +int SkTSect::EndsEqual(const SkTSect* sect1, + const SkTSect* sect2, SkIntersections* intersections) { + int zeroOneSet = 0; + if (sect1->fCurve[0] == sect2->fCurve[0]) { + zeroOneSet |= kZeroS1Set | kZeroS2Set; + intersections->insert(0, 0, sect1->fCurve[0]); + } + if (sect1->fCurve[0] == sect2->pointLast()) { + zeroOneSet |= kZeroS1Set | kOneS2Set; + intersections->insert(0, 1, sect1->fCurve[0]); + } + if (sect1->pointLast() == sect2->fCurve[0]) { + zeroOneSet |= kOneS1Set | kZeroS2Set; + intersections->insert(1, 0, sect1->pointLast()); + } + if (sect1->pointLast() == sect2->pointLast()) { + zeroOneSet |= kOneS1Set | kOneS2Set; + intersections->insert(1, 1, sect1->pointLast()); + } + // check for zero + if (!(zeroOneSet & (kZeroS1Set | kZeroS2Set)) + && sect1->fCurve[0].approximatelyEqual(sect2->fCurve[0])) { + zeroOneSet |= kZeroS1Set | kZeroS2Set; + intersections->insertNear(0, 0, sect1->fCurve[0], sect2->fCurve[0]); + } + if (!(zeroOneSet & (kZeroS1Set | kOneS2Set)) + && sect1->fCurve[0].approximatelyEqual(sect2->pointLast())) { + zeroOneSet |= kZeroS1Set | kOneS2Set; + intersections->insertNear(0, 1, sect1->fCurve[0], sect2->pointLast()); + } + // check for one + if (!(zeroOneSet & (kOneS1Set | kZeroS2Set)) + && sect1->pointLast().approximatelyEqual(sect2->fCurve[0])) { + zeroOneSet |= kOneS1Set | kZeroS2Set; + intersections->insertNear(1, 0, sect1->pointLast(), sect2->fCurve[0]); + } + if (!(zeroOneSet & (kOneS1Set | kOneS2Set)) + && sect1->pointLast().approximatelyEqual(sect2->pointLast())) { + zeroOneSet |= kOneS1Set | kOneS2Set; + intersections->insertNear(1, 1, sect1->pointLast(), sect2->pointLast()); + } + return zeroOneSet; +} + +struct SkClosestRecord { + bool operator<(const SkClosestRecord& rh) const { + return fClosest < rh.fClosest; + } + + void addIntersection(SkIntersections* intersections) const { + double r1t = fC1Index ? fC1Span->endT() : fC1Span->startT(); + double r2t = fC2Index ? fC2Span->endT() : fC2Span->startT(); + intersections->insert(r1t, r2t, fC1Span->part()[fC1Index]); + } + + void findEnd(const SkTSpan* span1, const SkTSpan* span2, + int c1Index, int c2Index) { + const SkTCurve& c1 = span1->part(); + const SkTCurve& c2 = span2->part(); + if (!c1[c1Index].approximatelyEqual(c2[c2Index])) { + return; + } + double dist = c1[c1Index].distanceSquared(c2[c2Index]); + if (fClosest < dist) { + return; + } + fC1Span = span1; + fC2Span = span2; + fC1StartT = span1->startT(); + fC1EndT = span1->endT(); + fC2StartT = span2->startT(); + fC2EndT = span2->endT(); + fC1Index = c1Index; + fC2Index = c2Index; + fClosest = dist; + } + + bool matesWith(const SkClosestRecord& mate SkDEBUGPARAMS(SkIntersections* i)) const { + SkOPOBJASSERT(i, fC1Span == mate.fC1Span || fC1Span->endT() <= mate.fC1Span->startT() + || mate.fC1Span->endT() <= fC1Span->startT()); + SkOPOBJASSERT(i, fC2Span == mate.fC2Span || fC2Span->endT() <= mate.fC2Span->startT() + || mate.fC2Span->endT() <= fC2Span->startT()); + return fC1Span == mate.fC1Span || fC1Span->endT() == mate.fC1Span->startT() + || fC1Span->startT() == mate.fC1Span->endT() + || fC2Span == mate.fC2Span + || fC2Span->endT() == mate.fC2Span->startT() + || fC2Span->startT() == mate.fC2Span->endT(); + } + + void merge(const SkClosestRecord& mate) { + fC1Span = mate.fC1Span; + fC2Span = mate.fC2Span; + fClosest = mate.fClosest; + fC1Index = mate.fC1Index; + fC2Index = mate.fC2Index; + } + + void reset() { + fClosest = FLT_MAX; + SkDEBUGCODE(fC1Span = nullptr); + SkDEBUGCODE(fC2Span = nullptr); + SkDEBUGCODE(fC1Index = fC2Index = -1); + } + + void update(const SkClosestRecord& mate) { + fC1StartT = std::min(fC1StartT, mate.fC1StartT); + fC1EndT = std::max(fC1EndT, mate.fC1EndT); + fC2StartT = std::min(fC2StartT, mate.fC2StartT); + fC2EndT = std::max(fC2EndT, mate.fC2EndT); + } + + const SkTSpan* fC1Span; + const SkTSpan* fC2Span; + double fC1StartT; + double fC1EndT; + double fC2StartT; + double fC2EndT; + double fClosest; + int fC1Index; + int fC2Index; +}; + +struct SkClosestSect { + SkClosestSect() + : fUsed(0) { + fClosest.push_back().reset(); + } + + bool find(const SkTSpan* span1, const SkTSpan* span2 + SkDEBUGPARAMS(SkIntersections* i)) { + SkClosestRecord* record = &fClosest[fUsed]; + record->findEnd(span1, span2, 0, 0); + record->findEnd(span1, span2, 0, span2->part().pointLast()); + record->findEnd(span1, span2, span1->part().pointLast(), 0); + record->findEnd(span1, span2, span1->part().pointLast(), span2->part().pointLast()); + if (record->fClosest == FLT_MAX) { + return false; + } + for (int index = 0; index < fUsed; ++index) { + SkClosestRecord* test = &fClosest[index]; + if (test->matesWith(*record SkDEBUGPARAMS(i))) { + if (test->fClosest > record->fClosest) { + test->merge(*record); + } + test->update(*record); + record->reset(); + return false; + } + } + ++fUsed; + fClosest.push_back().reset(); + return true; + } + + void finish(SkIntersections* intersections) const { + SkSTArray closestPtrs; + for (int index = 0; index < fUsed; ++index) { + closestPtrs.push_back(&fClosest[index]); + } + SkTQSort(closestPtrs.begin(), closestPtrs.end()); + for (int index = 0; index < fUsed; ++index) { + const SkClosestRecord* test = closestPtrs[index]; + test->addIntersection(intersections); + } + } + + // this is oversized so that an extra records can merge into final one + SkSTArray fClosest; + int fUsed; +}; + +// returns true if the rect is too small to consider + +void SkTSect::BinarySearch(SkTSect* sect1, + SkTSect* sect2, SkIntersections* intersections) { +#if DEBUG_T_SECT_DUMP > 1 + gDumpTSectNum = 0; +#endif + SkDEBUGCODE(sect1->fOppSect = sect2); + SkDEBUGCODE(sect2->fOppSect = sect1); + intersections->reset(); + intersections->setMax(sect1->fCurve.maxIntersections() + 4); // give extra for slop + SkTSpan* span1 = sect1->fHead; + SkTSpan* span2 = sect2->fHead; + int oppSect, sect = sect1->intersects(span1, sect2, span2, &oppSect); +// SkASSERT(between(0, sect, 2)); + if (!sect) { + return; + } + if (sect == 2 && oppSect == 2) { + (void) EndsEqual(sect1, sect2, intersections); + return; + } + span1->addBounded(span2, §1->fHeap); + span2->addBounded(span1, §2->fHeap); + const int kMaxCoinLoopCount = 8; + int coinLoopCount = kMaxCoinLoopCount; + double start1s SK_INIT_TO_AVOID_WARNING; + double start1e SK_INIT_TO_AVOID_WARNING; + do { + // find the largest bounds + SkTSpan* largest1 = sect1->boundsMax(); + if (!largest1) { + if (sect1->fHung) { + return; + } + break; + } + SkTSpan* largest2 = sect2->boundsMax(); + // split it + if (!largest2 || (largest1 && (largest1->fBoundsMax > largest2->fBoundsMax + || (!largest1->fCollapsed && largest2->fCollapsed)))) { + if (sect2->fHung) { + return; + } + if (largest1->fCollapsed) { + break; + } + sect1->resetRemovedEnds(); + sect2->resetRemovedEnds(); + // trim parts that don't intersect the opposite + SkTSpan* half1 = sect1->addOne(); + SkDEBUGCODE(half1->debugSetGlobalState(sect1->globalState())); + if (!half1->split(largest1, §1->fHeap)) { + break; + } + if (!sect1->trim(largest1, sect2)) { + SkOPOBJASSERT(intersections, 0); + return; + } + if (!sect1->trim(half1, sect2)) { + SkOPOBJASSERT(intersections, 0); + return; + } + } else { + if (largest2->fCollapsed) { + break; + } + sect1->resetRemovedEnds(); + sect2->resetRemovedEnds(); + // trim parts that don't intersect the opposite + SkTSpan* half2 = sect2->addOne(); + SkDEBUGCODE(half2->debugSetGlobalState(sect2->globalState())); + if (!half2->split(largest2, §2->fHeap)) { + break; + } + if (!sect2->trim(largest2, sect1)) { + SkOPOBJASSERT(intersections, 0); + return; + } + if (!sect2->trim(half2, sect1)) { + SkOPOBJASSERT(intersections, 0); + return; + } + } + sect1->validate(); + sect2->validate(); +#if DEBUG_T_SECT_LOOP_COUNT + intersections->debugBumpLoopCount(SkIntersections::kIterations_DebugLoop); +#endif + // if there are 9 or more continuous spans on both sects, suspect coincidence + if (sect1->fActiveCount >= COINCIDENT_SPAN_COUNT + && sect2->fActiveCount >= COINCIDENT_SPAN_COUNT) { + if (coinLoopCount == kMaxCoinLoopCount) { + start1s = sect1->fHead->fStartT; + start1e = sect1->tail()->fEndT; + } + if (!sect1->coincidentCheck(sect2)) { + return; + } + sect1->validate(); + sect2->validate(); +#if DEBUG_T_SECT_LOOP_COUNT + intersections->debugBumpLoopCount(SkIntersections::kCoinCheck_DebugLoop); +#endif + if (!--coinLoopCount && sect1->fHead && sect2->fHead) { + /* All known working cases resolve in two tries. Sadly, cubicConicTests[0] + gets stuck in a loop. It adds an extension to allow a coincident end + perpendicular to track its intersection in the opposite curve. However, + the bounding box of the extension does not intersect the original curve, + so the extension is discarded, only to be added again the next time around. */ + sect1->coincidentForce(sect2, start1s, start1e); + sect1->validate(); + sect2->validate(); + } + } + if (sect1->fActiveCount >= COINCIDENT_SPAN_COUNT + && sect2->fActiveCount >= COINCIDENT_SPAN_COUNT) { + if (!sect1->fHead) { + return; + } + sect1->computePerpendiculars(sect2, sect1->fHead, sect1->tail()); + if (!sect2->fHead) { + return; + } + sect2->computePerpendiculars(sect1, sect2->fHead, sect2->tail()); + if (!sect1->removeByPerpendicular(sect2)) { + return; + } + sect1->validate(); + sect2->validate(); +#if DEBUG_T_SECT_LOOP_COUNT + intersections->debugBumpLoopCount(SkIntersections::kComputePerp_DebugLoop); +#endif + if (sect1->collapsed() > sect1->fCurve.maxIntersections()) { + break; + } + } +#if DEBUG_T_SECT_DUMP + sect1->dumpBoth(sect2); +#endif + if (!sect1->fHead || !sect2->fHead) { + break; + } + } while (true); + SkTSpan* coincident = sect1->fCoincident; + if (coincident) { + // if there is more than one coincident span, check loosely to see if they should be joined + if (coincident->fNext) { + sect1->mergeCoincidence(sect2); + coincident = sect1->fCoincident; + } + SkASSERT(sect2->fCoincident); // courtesy check : coincidence only looks at sect 1 + do { + if (!coincident) { + return; + } + if (!coincident->fCoinStart.isMatch()) { + continue; + } + if (!coincident->fCoinEnd.isMatch()) { + continue; + } + double perpT = coincident->fCoinStart.perpT(); + if (perpT < 0) { + return; + } + int index = intersections->insertCoincident(coincident->fStartT, + perpT, coincident->pointFirst()); + if ((intersections->insertCoincident(coincident->fEndT, + coincident->fCoinEnd.perpT(), + coincident->pointLast()) < 0) && index >= 0) { + intersections->clearCoincidence(index); + } + } while ((coincident = coincident->fNext)); + } + int zeroOneSet = EndsEqual(sect1, sect2, intersections); +// if (!sect1->fHead || !sect2->fHead) { + // if the final iteration contains an end (0 or 1), + if (sect1->fRemovedStartT && !(zeroOneSet & kZeroS1Set)) { + SkTCoincident perp; // intersect perpendicular with opposite curve + perp.setPerp(sect1->fCurve, 0, sect1->fCurve[0], sect2->fCurve); + if (perp.isMatch()) { + intersections->insert(0, perp.perpT(), perp.perpPt()); + } + } + if (sect1->fRemovedEndT && !(zeroOneSet & kOneS1Set)) { + SkTCoincident perp; + perp.setPerp(sect1->fCurve, 1, sect1->pointLast(), sect2->fCurve); + if (perp.isMatch()) { + intersections->insert(1, perp.perpT(), perp.perpPt()); + } + } + if (sect2->fRemovedStartT && !(zeroOneSet & kZeroS2Set)) { + SkTCoincident perp; + perp.setPerp(sect2->fCurve, 0, sect2->fCurve[0], sect1->fCurve); + if (perp.isMatch()) { + intersections->insert(perp.perpT(), 0, perp.perpPt()); + } + } + if (sect2->fRemovedEndT && !(zeroOneSet & kOneS2Set)) { + SkTCoincident perp; + perp.setPerp(sect2->fCurve, 1, sect2->pointLast(), sect1->fCurve); + if (perp.isMatch()) { + intersections->insert(perp.perpT(), 1, perp.perpPt()); + } + } +// } + if (!sect1->fHead || !sect2->fHead) { + return; + } + sect1->recoverCollapsed(); + sect2->recoverCollapsed(); + SkTSpan* result1 = sect1->fHead; + // check heads and tails for zero and ones and insert them if we haven't already done so + const SkTSpan* head1 = result1; + if (!(zeroOneSet & kZeroS1Set) && approximately_less_than_zero(head1->fStartT)) { + const SkDPoint& start1 = sect1->fCurve[0]; + if (head1->isBounded()) { + double t = head1->closestBoundedT(start1); + if (sect2->fCurve.ptAtT(t).approximatelyEqual(start1)) { + intersections->insert(0, t, start1); + } + } + } + const SkTSpan* head2 = sect2->fHead; + if (!(zeroOneSet & kZeroS2Set) && approximately_less_than_zero(head2->fStartT)) { + const SkDPoint& start2 = sect2->fCurve[0]; + if (head2->isBounded()) { + double t = head2->closestBoundedT(start2); + if (sect1->fCurve.ptAtT(t).approximatelyEqual(start2)) { + intersections->insert(t, 0, start2); + } + } + } + if (!(zeroOneSet & kOneS1Set)) { + const SkTSpan* tail1 = sect1->tail(); + if (!tail1) { + return; + } + if (approximately_greater_than_one(tail1->fEndT)) { + const SkDPoint& end1 = sect1->pointLast(); + if (tail1->isBounded()) { + double t = tail1->closestBoundedT(end1); + if (sect2->fCurve.ptAtT(t).approximatelyEqual(end1)) { + intersections->insert(1, t, end1); + } + } + } + } + if (!(zeroOneSet & kOneS2Set)) { + const SkTSpan* tail2 = sect2->tail(); + if (!tail2) { + return; + } + if (approximately_greater_than_one(tail2->fEndT)) { + const SkDPoint& end2 = sect2->pointLast(); + if (tail2->isBounded()) { + double t = tail2->closestBoundedT(end2); + if (sect1->fCurve.ptAtT(t).approximatelyEqual(end2)) { + intersections->insert(t, 1, end2); + } + } + } + } + SkClosestSect closest; + do { + while (result1 && result1->fCoinStart.isMatch() && result1->fCoinEnd.isMatch()) { + result1 = result1->fNext; + } + if (!result1) { + break; + } + SkTSpan* result2 = sect2->fHead; + while (result2) { + closest.find(result1, result2 SkDEBUGPARAMS(intersections)); + result2 = result2->fNext; + } + } while ((result1 = result1->fNext)); + closest.finish(intersections); + // if there is more than one intersection and it isn't already coincident, check + int last = intersections->used() - 1; + for (int index = 0; index < last; ) { + if (intersections->isCoincident(index) && intersections->isCoincident(index + 1)) { + ++index; + continue; + } + double midT = ((*intersections)[0][index] + (*intersections)[0][index + 1]) / 2; + SkDPoint midPt = sect1->fCurve.ptAtT(midT); + // intersect perpendicular with opposite curve + SkTCoincident perp; + perp.setPerp(sect1->fCurve, midT, midPt, sect2->fCurve); + if (!perp.isMatch()) { + ++index; + continue; + } + if (intersections->isCoincident(index)) { + intersections->removeOne(index); + --last; + } else if (intersections->isCoincident(index + 1)) { + intersections->removeOne(index + 1); + --last; + } else { + intersections->setCoincident(index++); + } + intersections->setCoincident(index); + } + SkOPOBJASSERT(intersections, intersections->used() <= sect1->fCurve.maxIntersections()); +} + +int SkIntersections::intersect(const SkDQuad& q1, const SkDQuad& q2) { + SkTQuad quad1(q1); + SkTQuad quad2(q2); + SkTSect sect1(quad1 SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1)); + SkTSect sect2(quad2 SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2)); + SkTSect::BinarySearch(§1, §2, this); + return used(); +} + +int SkIntersections::intersect(const SkDConic& c, const SkDQuad& q) { + SkTConic conic(c); + SkTQuad quad(q); + SkTSect sect1(conic SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1)); + SkTSect sect2(quad SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2)); + SkTSect::BinarySearch(§1, §2, this); + return used(); +} + +int SkIntersections::intersect(const SkDConic& c1, const SkDConic& c2) { + SkTConic conic1(c1); + SkTConic conic2(c2); + SkTSect sect1(conic1 SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1)); + SkTSect sect2(conic2 SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2)); + SkTSect::BinarySearch(§1, §2, this); + return used(); +} + +int SkIntersections::intersect(const SkDCubic& c, const SkDQuad& q) { + SkTCubic cubic(c); + SkTQuad quad(q); + SkTSect sect1(cubic SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1)); + SkTSect sect2(quad SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2)); + SkTSect::BinarySearch(§1, §2, this); + return used(); +} + +int SkIntersections::intersect(const SkDCubic& cu, const SkDConic& co) { + SkTCubic cubic(cu); + SkTConic conic(co); + SkTSect sect1(cubic SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1)); + SkTSect sect2(conic SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2)); + SkTSect::BinarySearch(§1, §2, this); + return used(); + +} + +int SkIntersections::intersect(const SkDCubic& c1, const SkDCubic& c2) { + SkTCubic cubic1(c1); + SkTCubic cubic2(c2); + SkTSect sect1(cubic1 SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(1)); + SkTSect sect2(cubic2 SkDEBUGPARAMS(globalState()) PATH_OPS_DEBUG_T_SECT_PARAMS(2)); + SkTSect::BinarySearch(§1, §2, this); + return used(); +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsTSect.h b/gfx/skia/skia/src/pathops/SkPathOpsTSect.h new file mode 100644 index 0000000000..1929a8d616 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsTSect.h @@ -0,0 +1,376 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsTSect_DEFINED +#define SkPathOpsTSect_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkArenaAlloc.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsRect.h" +#include "src/pathops/SkPathOpsTCurve.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include + +class SkIntersections; +class SkTSect; +class SkTSpan; +struct SkDLine; + +#ifdef SK_DEBUG +typedef uint8_t SkOpDebugBool; +#else +typedef bool SkOpDebugBool; +#endif + +#define SkDoubleIsNaN sk_double_isnan + +class SkTCoincident { +public: + SkTCoincident() { + this->init(); + } + + void debugInit() { +#ifdef SK_DEBUG + this->fPerpPt.fX = this->fPerpPt.fY = SK_ScalarNaN; + this->fPerpT = SK_ScalarNaN; + this->fMatch = 0xFF; +#endif + } + + char dumpIsCoincidentStr() const; + void dump() const; + + bool isMatch() const { + SkASSERT(!!fMatch == fMatch); + return SkToBool(fMatch); + } + + void init() { + fPerpT = -1; + fMatch = false; + fPerpPt.fX = fPerpPt.fY = SK_ScalarNaN; + } + + void markCoincident() { + if (!fMatch) { + fPerpT = -1; + } + fMatch = true; + } + + const SkDPoint& perpPt() const { + return fPerpPt; + } + + double perpT() const { + return fPerpT; + } + + void setPerp(const SkTCurve& c1, double t, const SkDPoint& cPt, const SkTCurve& ); + +private: + SkDPoint fPerpPt; + double fPerpT; // perpendicular intersection on opposite curve + SkOpDebugBool fMatch; +}; + +struct SkTSpanBounded { + SkTSpan* fBounded; + SkTSpanBounded* fNext; +}; + +class SkTSpan { +public: + SkTSpan(const SkTCurve& curve, SkArenaAlloc& heap) { + fPart = curve.make(heap); + } + + void addBounded(SkTSpan* , SkArenaAlloc* ); + double closestBoundedT(const SkDPoint& pt) const; + bool contains(double t) const; + + void debugInit(const SkTCurve& curve, SkArenaAlloc& heap) { +#ifdef SK_DEBUG + SkTCurve* fake = curve.make(heap); + fake->debugInit(); + init(*fake); + initBounds(*fake); + fCoinStart.init(); + fCoinEnd.init(); +#endif + } + + const SkTSect* debugOpp() const; + +#ifdef SK_DEBUG + void debugSetGlobalState(SkOpGlobalState* state) { + fDebugGlobalState = state; + } + + const SkTSpan* debugSpan(int ) const; + const SkTSpan* debugT(double t) const; + bool debugIsBefore(const SkTSpan* span) const; +#endif + void dump() const; + void dumpAll() const; + void dumpBounded(int id) const; + void dumpBounds() const; + void dumpCoin() const; + + double endT() const { + return fEndT; + } + + SkTSpan* findOppSpan(const SkTSpan* opp) const; + + SkTSpan* findOppT(double t) const { + SkTSpan* result = oppT(t); + SkOPASSERT(result); + return result; + } + + SkDEBUGCODE(SkOpGlobalState* globalState() const { return fDebugGlobalState; }) + + bool hasOppT(double t) const { + return SkToBool(oppT(t)); + } + + int hullsIntersect(SkTSpan* span, bool* start, bool* oppStart); + void init(const SkTCurve& ); + bool initBounds(const SkTCurve& ); + + bool isBounded() const { + return fBounded != nullptr; + } + + bool linearsIntersect(SkTSpan* span); + double linearT(const SkDPoint& ) const; + + void markCoincident() { + fCoinStart.markCoincident(); + fCoinEnd.markCoincident(); + } + + const SkTSpan* next() const { + return fNext; + } + + bool onlyEndPointsInCommon(const SkTSpan* opp, bool* start, + bool* oppStart, bool* ptsInCommon); + + const SkTCurve& part() const { + return *fPart; + } + + int pointCount() const { + return fPart->pointCount(); + } + + const SkDPoint& pointFirst() const { + return (*fPart)[0]; + } + + const SkDPoint& pointLast() const { + return (*fPart)[fPart->pointLast()]; + } + + bool removeAllBounded(); + bool removeBounded(const SkTSpan* opp); + + void reset() { + fBounded = nullptr; + } + + void resetBounds(const SkTCurve& curve) { + fIsLinear = fIsLine = false; + initBounds(curve); + } + + bool split(SkTSpan* work, SkArenaAlloc* heap) { + return splitAt(work, (work->fStartT + work->fEndT) * 0.5, heap); + } + + bool splitAt(SkTSpan* work, double t, SkArenaAlloc* heap); + + double startT() const { + return fStartT; + } + +private: + + // implementation is for testing only + int debugID() const { + return PATH_OPS_DEBUG_T_SECT_RELEASE(fID, -1); + } + + void dumpID() const; + + int hullCheck(const SkTSpan* opp, bool* start, bool* oppStart); + int linearIntersects(const SkTCurve& ) const; + SkTSpan* oppT(double t) const; + + void validate() const; + void validateBounded() const; + void validatePerpT(double oppT) const; + void validatePerpPt(double t, const SkDPoint& ) const; + + SkTCurve* fPart; + SkTCoincident fCoinStart; + SkTCoincident fCoinEnd; + SkTSpanBounded* fBounded; + SkTSpan* fPrev; + SkTSpan* fNext; + SkDRect fBounds; + double fStartT; + double fEndT; + double fBoundsMax; + SkOpDebugBool fCollapsed; + SkOpDebugBool fHasPerp; + SkOpDebugBool fIsLinear; + SkOpDebugBool fIsLine; + SkOpDebugBool fDeleted; + SkDEBUGCODE(SkOpGlobalState* fDebugGlobalState); + SkDEBUGCODE(SkTSect* fDebugSect); + PATH_OPS_DEBUG_T_SECT_CODE(int fID); + friend class SkTSect; +}; + +class SkTSect { +public: + SkTSect(const SkTCurve& c + SkDEBUGPARAMS(SkOpGlobalState* ) PATH_OPS_DEBUG_T_SECT_PARAMS(int id)); + static void BinarySearch(SkTSect* sect1, SkTSect* sect2, + SkIntersections* intersections); + + SkDEBUGCODE(SkOpGlobalState* globalState() { return fDebugGlobalState; }) + bool hasBounded(const SkTSpan* ) const; + + const SkTSect* debugOpp() const { + return SkDEBUGRELEASE(fOppSect, nullptr); + } + +#ifdef SK_DEBUG + const SkTSpan* debugSpan(int id) const; + const SkTSpan* debugT(double t) const; +#endif + void dump() const; + void dumpBoth(SkTSect* ) const; + void dumpBounded(int id) const; + void dumpBounds() const; + void dumpCoin() const; + void dumpCoinCurves() const; + void dumpCurves() const; + +private: + enum { + kZeroS1Set = 1, + kOneS1Set = 2, + kZeroS2Set = 4, + kOneS2Set = 8 + }; + + SkTSpan* addFollowing(SkTSpan* prior); + void addForPerp(SkTSpan* span, double t); + SkTSpan* addOne(); + + SkTSpan* addSplitAt(SkTSpan* span, double t) { + SkTSpan* result = this->addOne(); + SkDEBUGCODE(result->debugSetGlobalState(this->globalState())); + result->splitAt(span, t, &fHeap); + result->initBounds(fCurve); + span->initBounds(fCurve); + return result; + } + + bool binarySearchCoin(SkTSect* , double tStart, double tStep, double* t, + double* oppT, SkTSpan** oppFirst); + SkTSpan* boundsMax(); + bool coincidentCheck(SkTSect* sect2); + void coincidentForce(SkTSect* sect2, double start1s, double start1e); + bool coincidentHasT(double t); + int collapsed() const; + void computePerpendiculars(SkTSect* sect2, SkTSpan* first, + SkTSpan* last); + int countConsecutiveSpans(SkTSpan* first, + SkTSpan** last) const; + + int debugID() const { + return PATH_OPS_DEBUG_T_SECT_RELEASE(fID, -1); + } + + bool deleteEmptySpans(); + void dumpCommon(const SkTSpan* ) const; + void dumpCommonCurves(const SkTSpan* ) const; + static int EndsEqual(const SkTSect* sect1, const SkTSect* sect2, + SkIntersections* ); + bool extractCoincident(SkTSect* sect2, SkTSpan* first, + SkTSpan* last, SkTSpan** result); + SkTSpan* findCoincidentRun(SkTSpan* first, SkTSpan** lastPtr); + int intersects(SkTSpan* span, SkTSect* opp, + SkTSpan* oppSpan, int* oppResult); + bool isParallel(const SkDLine& thisLine, const SkTSect* opp) const; + int linesIntersect(SkTSpan* span, SkTSect* opp, + SkTSpan* oppSpan, SkIntersections* ); + bool markSpanGone(SkTSpan* span); + bool matchedDirection(double t, const SkTSect* sect2, double t2) const; + void matchedDirCheck(double t, const SkTSect* sect2, double t2, + bool* calcMatched, bool* oppMatched) const; + void mergeCoincidence(SkTSect* sect2); + + const SkDPoint& pointLast() const { + return fCurve[fCurve.pointLast()]; + } + + SkTSpan* prev(SkTSpan* ) const; + bool removeByPerpendicular(SkTSect* opp); + void recoverCollapsed(); + bool removeCoincident(SkTSpan* span, bool isBetween); + void removeAllBut(const SkTSpan* keep, SkTSpan* span, + SkTSect* opp); + bool removeSpan(SkTSpan* span); + void removeSpanRange(SkTSpan* first, SkTSpan* last); + bool removeSpans(SkTSpan* span, SkTSect* opp); + void removedEndCheck(SkTSpan* span); + + void resetRemovedEnds() { + fRemovedStartT = fRemovedEndT = false; + } + + SkTSpan* spanAtT(double t, SkTSpan** priorSpan); + SkTSpan* tail(); + bool trim(SkTSpan* span, SkTSect* opp); + bool unlinkSpan(SkTSpan* span); + bool updateBounded(SkTSpan* first, SkTSpan* last, + SkTSpan* oppFirst); + void validate() const; + void validateBounded() const; + + const SkTCurve& fCurve; + SkSTArenaAlloc<1024> fHeap; + SkTSpan* fHead; + SkTSpan* fCoincident; + SkTSpan* fDeleted; + int fActiveCount; + bool fRemovedStartT; + bool fRemovedEndT; + bool fHung; + SkDEBUGCODE(SkOpGlobalState* fDebugGlobalState); + SkDEBUGCODE(SkTSect* fOppSect); + PATH_OPS_DEBUG_T_SECT_CODE(int fID); + PATH_OPS_DEBUG_T_SECT_CODE(int fDebugCount); +#if DEBUG_T_SECT + int fDebugAllocatedCount; +#endif + friend class SkTSpan; +}; + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsTightBounds.cpp b/gfx/skia/skia/src/pathops/SkPathOpsTightBounds.cpp new file mode 100644 index 0000000000..a079512ddf --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsTightBounds.cpp @@ -0,0 +1,83 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkPath.h" +#include "include/core/SkPathTypes.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/pathops/SkPathOps.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkPathPriv.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpEdgeBuilder.h" +#include "src/pathops/SkPathOpsBounds.h" +#include "src/pathops/SkPathOpsCommon.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include + +bool TightBounds(const SkPath& path, SkRect* result) { + SkRect moveBounds = { SK_ScalarMax, SK_ScalarMax, SK_ScalarMin, SK_ScalarMin }; + bool wellBehaved = true; + for (auto [verb, pts, w] : SkPathPriv::Iterate(path)) { + switch (verb) { + case SkPathVerb::kMove: + moveBounds.fLeft = std::min(moveBounds.fLeft, pts[0].fX); + moveBounds.fTop = std::min(moveBounds.fTop, pts[0].fY); + moveBounds.fRight = std::max(moveBounds.fRight, pts[0].fX); + moveBounds.fBottom = std::max(moveBounds.fBottom, pts[0].fY); + break; + case SkPathVerb::kQuad: + case SkPathVerb::kConic: + if (!wellBehaved) { + break; + } + wellBehaved &= between(pts[0].fX, pts[1].fX, pts[2].fX); + wellBehaved &= between(pts[0].fY, pts[1].fY, pts[2].fY); + break; + case SkPathVerb::kCubic: + if (!wellBehaved) { + break; + } + wellBehaved &= between(pts[0].fX, pts[1].fX, pts[3].fX); + wellBehaved &= between(pts[0].fY, pts[1].fY, pts[3].fY); + wellBehaved &= between(pts[0].fX, pts[2].fX, pts[3].fX); + wellBehaved &= between(pts[0].fY, pts[2].fY, pts[3].fY); + break; + default: + break; + } + } + if (wellBehaved) { + *result = path.getBounds(); + return true; + } + SkSTArenaAlloc<4096> allocator; // FIXME: constant-ize, tune + SkOpContour contour; + SkOpContourHead* contourList = static_cast(&contour); + SkOpGlobalState globalState(contourList, &allocator SkDEBUGPARAMS(false) + SkDEBUGPARAMS(nullptr)); + // turn path into list of segments + SkOpEdgeBuilder builder(path, contourList, &globalState); + if (!builder.finish()) { + return false; + } + if (!SortContourList(&contourList, false, false)) { + *result = moveBounds; + return true; + } + SkOpContour* current = contourList; + SkPathOpsBounds bounds = current->bounds(); + while ((current = current->next())) { + bounds.add(current->bounds()); + } + *result = bounds; + if (!moveBounds.isEmpty()) { + result->join(moveBounds); + } + return true; +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsTypes.cpp b/gfx/skia/skia/src/pathops/SkPathOpsTypes.cpp new file mode 100644 index 0000000000..d325d86a83 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsTypes.cpp @@ -0,0 +1,226 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathOpsTypes.h" + +#include "include/private/base/SkFloatBits.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTemplates.h" + +#include +#include + +static bool arguments_denormalized(float a, float b, int epsilon) { + float denormalizedCheck = FLT_EPSILON * epsilon / 2; + return fabsf(a) <= denormalizedCheck && fabsf(b) <= denormalizedCheck; +} + +// from http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/ +// FIXME: move to SkFloatBits.h +static bool equal_ulps(float a, float b, int epsilon, int depsilon) { + if (arguments_denormalized(a, b, depsilon)) { + return true; + } + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits < bBits + epsilon && bBits < aBits + epsilon; +} + +static bool equal_ulps_no_normal_check(float a, float b, int epsilon, int depsilon) { + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits < bBits + epsilon && bBits < aBits + epsilon; +} + +static bool equal_ulps_pin(float a, float b, int epsilon, int depsilon) { + if (!SkScalarIsFinite(a) || !SkScalarIsFinite(b)) { + return false; + } + if (arguments_denormalized(a, b, depsilon)) { + return true; + } + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits < bBits + epsilon && bBits < aBits + epsilon; +} + +static bool d_equal_ulps(float a, float b, int epsilon) { + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits < bBits + epsilon && bBits < aBits + epsilon; +} + +static bool not_equal_ulps(float a, float b, int epsilon) { + if (arguments_denormalized(a, b, epsilon)) { + return false; + } + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits >= bBits + epsilon || bBits >= aBits + epsilon; +} + +static bool not_equal_ulps_pin(float a, float b, int epsilon) { + if (!SkScalarIsFinite(a) || !SkScalarIsFinite(b)) { + return false; + } + if (arguments_denormalized(a, b, epsilon)) { + return false; + } + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits >= bBits + epsilon || bBits >= aBits + epsilon; +} + +static bool d_not_equal_ulps(float a, float b, int epsilon) { + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits >= bBits + epsilon || bBits >= aBits + epsilon; +} + +static bool less_ulps(float a, float b, int epsilon) { + if (arguments_denormalized(a, b, epsilon)) { + return a <= b - FLT_EPSILON * epsilon; + } + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits <= bBits - epsilon; +} + +static bool less_or_equal_ulps(float a, float b, int epsilon) { + if (arguments_denormalized(a, b, epsilon)) { + return a < b + FLT_EPSILON * epsilon; + } + int aBits = SkFloatAs2sCompliment(a); + int bBits = SkFloatAs2sCompliment(b); + // Find the difference in ULPs. + return aBits < bBits + epsilon; +} + +// equality using the same error term as between +bool AlmostBequalUlps(float a, float b) { + const int UlpsEpsilon = 2; + return equal_ulps(a, b, UlpsEpsilon, UlpsEpsilon); +} + +bool AlmostPequalUlps(float a, float b) { + const int UlpsEpsilon = 8; + return equal_ulps(a, b, UlpsEpsilon, UlpsEpsilon); +} + +bool AlmostDequalUlps(float a, float b) { + const int UlpsEpsilon = 16; + return d_equal_ulps(a, b, UlpsEpsilon); +} + +bool AlmostDequalUlps(double a, double b) { + if (fabs(a) < SK_ScalarMax && fabs(b) < SK_ScalarMax) { + return AlmostDequalUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); + } + // We allow divide-by-zero here. It only happens if one of a,b is zero, and the other is NaN. + // (Otherwise, we'd hit the condition above). Thus, if std::max returns 0, we compute NaN / 0, + // which will produce NaN. The comparison will return false, which is the correct answer. + return sk_ieee_double_divide(fabs(a - b), std::max(fabs(a), fabs(b))) < FLT_EPSILON * 16; +} + +bool AlmostEqualUlps(float a, float b) { + const int UlpsEpsilon = 16; + return equal_ulps(a, b, UlpsEpsilon, UlpsEpsilon); +} + +bool AlmostEqualUlpsNoNormalCheck(float a, float b) { + const int UlpsEpsilon = 16; + return equal_ulps_no_normal_check(a, b, UlpsEpsilon, UlpsEpsilon); +} + +bool AlmostEqualUlps_Pin(float a, float b) { + const int UlpsEpsilon = 16; + return equal_ulps_pin(a, b, UlpsEpsilon, UlpsEpsilon); +} + +bool NotAlmostEqualUlps(float a, float b) { + const int UlpsEpsilon = 16; + return not_equal_ulps(a, b, UlpsEpsilon); +} + +bool NotAlmostEqualUlps_Pin(float a, float b) { + const int UlpsEpsilon = 16; + return not_equal_ulps_pin(a, b, UlpsEpsilon); +} + +bool NotAlmostDequalUlps(float a, float b) { + const int UlpsEpsilon = 16; + return d_not_equal_ulps(a, b, UlpsEpsilon); +} + +bool RoughlyEqualUlps(float a, float b) { + const int UlpsEpsilon = 256; + const int DUlpsEpsilon = 1024; + return equal_ulps(a, b, UlpsEpsilon, DUlpsEpsilon); +} + +bool AlmostBetweenUlps(float a, float b, float c) { + const int UlpsEpsilon = 2; + return a <= c ? less_or_equal_ulps(a, b, UlpsEpsilon) && less_or_equal_ulps(b, c, UlpsEpsilon) + : less_or_equal_ulps(b, a, UlpsEpsilon) && less_or_equal_ulps(c, b, UlpsEpsilon); +} + +bool AlmostLessUlps(float a, float b) { + const int UlpsEpsilon = 16; + return less_ulps(a, b, UlpsEpsilon); +} + +bool AlmostLessOrEqualUlps(float a, float b) { + const int UlpsEpsilon = 16; + return less_or_equal_ulps(a, b, UlpsEpsilon); +} + +int UlpsDistance(float a, float b) { + SkFloatIntUnion floatIntA, floatIntB; + floatIntA.fFloat = a; + floatIntB.fFloat = b; + // Different signs means they do not match. + if ((floatIntA.fSignBitInt < 0) != (floatIntB.fSignBitInt < 0)) { + // Check for equality to make sure +0 == -0 + return a == b ? 0 : SK_MaxS32; + } + // Find the difference in ULPs. + return SkTAbs(floatIntA.fSignBitInt - floatIntB.fSignBitInt); +} + +SkOpGlobalState::SkOpGlobalState(SkOpContourHead* head, + SkArenaAlloc* allocator + SkDEBUGPARAMS(bool debugSkipAssert) + SkDEBUGPARAMS(const char* testName)) + : fAllocator(allocator) + , fCoincidence(nullptr) + , fContourHead(head) + , fNested(0) + , fWindingFailed(false) + , fPhase(SkOpPhase::kIntersecting) + SkDEBUGPARAMS(fDebugTestName(testName)) + SkDEBUGPARAMS(fAngleID(0)) + SkDEBUGPARAMS(fCoinID(0)) + SkDEBUGPARAMS(fContourID(0)) + SkDEBUGPARAMS(fPtTID(0)) + SkDEBUGPARAMS(fSegmentID(0)) + SkDEBUGPARAMS(fSpanID(0)) + SkDEBUGPARAMS(fDebugSkipAssert(debugSkipAssert)) { +#if DEBUG_T_SECT_LOOP_COUNT + debugResetLoopCounts(); +#endif +#if DEBUG_COIN + fPreviousFuncName = nullptr; +#endif +} diff --git a/gfx/skia/skia/src/pathops/SkPathOpsTypes.h b/gfx/skia/skia/src/pathops/SkPathOpsTypes.h new file mode 100644 index 0000000000..c05ac7c7d5 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsTypes.h @@ -0,0 +1,607 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathOpsTypes_DEFINED +#define SkPathOpsTypes_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "src/pathops/SkPathOpsDebug.h" + +#include +#include + +enum SkPathOpsMask { + kWinding_PathOpsMask = -1, + kNo_PathOpsMask = 0, + kEvenOdd_PathOpsMask = 1 +}; + +class SkArenaAlloc; +class SkOpCoincidence; +class SkOpContour; +class SkOpContourHead; + +enum class SkOpPhase : char { + kNoChange, + kIntersecting, + kWalking, + kFixWinding, +}; + +class SkOpGlobalState { +public: + SkOpGlobalState(SkOpContourHead* head, + SkArenaAlloc* allocator SkDEBUGPARAMS(bool debugSkipAssert) + SkDEBUGPARAMS(const char* testName)); + + enum { + kMaxWindingTries = 10 + }; + + bool allocatedOpSpan() const { + return fAllocatedOpSpan; + } + + SkArenaAlloc* allocator() { + return fAllocator; + } + + void bumpNested() { + ++fNested; + } + + void clearNested() { + fNested = 0; + } + + SkOpCoincidence* coincidence() { + return fCoincidence; + } + + SkOpContourHead* contourHead() { + return fContourHead; + } + +#ifdef SK_DEBUG + const class SkOpAngle* debugAngle(int id) const; + const SkOpCoincidence* debugCoincidence() const; + SkOpContour* debugContour(int id) const; + const class SkOpPtT* debugPtT(int id) const; +#endif + + static bool DebugRunFail(); + +#ifdef SK_DEBUG + const class SkOpSegment* debugSegment(int id) const; + bool debugSkipAssert() const { return fDebugSkipAssert; } + const class SkOpSpanBase* debugSpan(int id) const; + const char* debugTestName() const { return fDebugTestName; } +#endif + +#if DEBUG_T_SECT_LOOP_COUNT + void debugAddLoopCount(SkIntersections* , const SkIntersectionHelper& , + const SkIntersectionHelper& ); + void debugDoYourWorst(SkOpGlobalState* ); + void debugLoopReport(); + void debugResetLoopCounts(); +#endif + +#if DEBUG_COINCIDENCE + void debugSetCheckHealth(bool check) { fDebugCheckHealth = check; } + bool debugCheckHealth() const { return fDebugCheckHealth; } +#endif + +#if DEBUG_VALIDATE || DEBUG_COIN + void debugSetPhase(const char* funcName DEBUG_COIN_DECLARE_PARAMS()) const; +#endif + +#if DEBUG_COIN + void debugAddToCoinChangedDict(); + void debugAddToGlobalCoinDicts(); + SkPathOpsDebug::CoinDict* debugCoinChangedDict() { return &fCoinChangedDict; } + const SkPathOpsDebug::CoinDictEntry& debugCoinDictEntry() const { return fCoinDictEntry; } + + static void DumpCoinDict(); +#endif + + + int nested() const { + return fNested; + } + +#ifdef SK_DEBUG + int nextAngleID() { + return ++fAngleID; + } + + int nextCoinID() { + return ++fCoinID; + } + + int nextContourID() { + return ++fContourID; + } + + int nextPtTID() { + return ++fPtTID; + } + + int nextSegmentID() { + return ++fSegmentID; + } + + int nextSpanID() { + return ++fSpanID; + } +#endif + + SkOpPhase phase() const { + return fPhase; + } + + void resetAllocatedOpSpan() { + fAllocatedOpSpan = false; + } + + void setAllocatedOpSpan() { + fAllocatedOpSpan = true; + } + + void setCoincidence(SkOpCoincidence* coincidence) { + fCoincidence = coincidence; + } + + void setContourHead(SkOpContourHead* contourHead) { + fContourHead = contourHead; + } + + void setPhase(SkOpPhase phase) { + if (SkOpPhase::kNoChange == phase) { + return; + } + SkASSERT(fPhase != phase); + fPhase = phase; + } + + // called in very rare cases where angles are sorted incorrectly -- signfies op will fail + void setWindingFailed() { + fWindingFailed = true; + } + + bool windingFailed() const { + return fWindingFailed; + } + +private: + SkArenaAlloc* fAllocator; + SkOpCoincidence* fCoincidence; + SkOpContourHead* fContourHead; + int fNested; + bool fAllocatedOpSpan; + bool fWindingFailed; + SkOpPhase fPhase; +#ifdef SK_DEBUG + const char* fDebugTestName; + void* fDebugReporter; + int fAngleID; + int fCoinID; + int fContourID; + int fPtTID; + int fSegmentID; + int fSpanID; + bool fDebugSkipAssert; +#endif +#if DEBUG_T_SECT_LOOP_COUNT + int fDebugLoopCount[3]; + SkPath::Verb fDebugWorstVerb[6]; + SkPoint fDebugWorstPts[24]; + float fDebugWorstWeight[6]; +#endif +#if DEBUG_COIN + SkPathOpsDebug::CoinDict fCoinChangedDict; + SkPathOpsDebug::CoinDict fCoinVisitedDict; + SkPathOpsDebug::CoinDictEntry fCoinDictEntry; + const char* fPreviousFuncName; +#endif +#if DEBUG_COINCIDENCE + bool fDebugCheckHealth; +#endif +}; + +#ifdef SK_DEBUG +#if DEBUG_COINCIDENCE +#define SkOPASSERT(cond) SkASSERT((this->globalState() && \ + (this->globalState()->debugCheckHealth() || \ + this->globalState()->debugSkipAssert())) || (cond)) +#else +#define SkOPASSERT(cond) SkASSERT((this->globalState() && \ + this->globalState()->debugSkipAssert()) || (cond)) +#endif +#define SkOPOBJASSERT(obj, cond) SkASSERT((obj->globalState() && \ + obj->globalState()->debugSkipAssert()) || (cond)) +#else +#define SkOPASSERT(cond) +#define SkOPOBJASSERT(obj, cond) +#endif + +// Use Almost Equal when comparing coordinates. Use epsilon to compare T values. +bool AlmostEqualUlps(float a, float b); +inline bool AlmostEqualUlps(double a, double b) { + return AlmostEqualUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool AlmostEqualUlpsNoNormalCheck(float a, float b); +inline bool AlmostEqualUlpsNoNormalCheck(double a, double b) { + return AlmostEqualUlpsNoNormalCheck(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool AlmostEqualUlps_Pin(float a, float b); +inline bool AlmostEqualUlps_Pin(double a, double b) { + return AlmostEqualUlps_Pin(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +// Use Almost Dequal when comparing should not special case denormalized values. +bool AlmostDequalUlps(float a, float b); +bool AlmostDequalUlps(double a, double b); + +bool NotAlmostEqualUlps(float a, float b); +inline bool NotAlmostEqualUlps(double a, double b) { + return NotAlmostEqualUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool NotAlmostEqualUlps_Pin(float a, float b); +inline bool NotAlmostEqualUlps_Pin(double a, double b) { + return NotAlmostEqualUlps_Pin(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool NotAlmostDequalUlps(float a, float b); +inline bool NotAlmostDequalUlps(double a, double b) { + return NotAlmostDequalUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +// Use Almost Bequal when comparing coordinates in conjunction with between. +bool AlmostBequalUlps(float a, float b); +inline bool AlmostBequalUlps(double a, double b) { + return AlmostBequalUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool AlmostPequalUlps(float a, float b); +inline bool AlmostPequalUlps(double a, double b) { + return AlmostPequalUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool RoughlyEqualUlps(float a, float b); +inline bool RoughlyEqualUlps(double a, double b) { + return RoughlyEqualUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool AlmostLessUlps(float a, float b); +inline bool AlmostLessUlps(double a, double b) { + return AlmostLessUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool AlmostLessOrEqualUlps(float a, float b); +inline bool AlmostLessOrEqualUlps(double a, double b) { + return AlmostLessOrEqualUlps(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +bool AlmostBetweenUlps(float a, float b, float c); +inline bool AlmostBetweenUlps(double a, double b, double c) { + return AlmostBetweenUlps(SkDoubleToScalar(a), SkDoubleToScalar(b), SkDoubleToScalar(c)); +} + +int UlpsDistance(float a, float b); +inline int UlpsDistance(double a, double b) { + return UlpsDistance(SkDoubleToScalar(a), SkDoubleToScalar(b)); +} + +// FLT_EPSILON == 1.19209290E-07 == 1 / (2 ^ 23) +// DBL_EPSILON == 2.22045e-16 +const double FLT_EPSILON_CUBED = FLT_EPSILON * FLT_EPSILON * FLT_EPSILON; +const double FLT_EPSILON_HALF = FLT_EPSILON / 2; +const double FLT_EPSILON_DOUBLE = FLT_EPSILON * 2; +const double FLT_EPSILON_ORDERABLE_ERR = FLT_EPSILON * 16; +const double FLT_EPSILON_SQUARED = FLT_EPSILON * FLT_EPSILON; +// Use a compile-time constant for FLT_EPSILON_SQRT to avoid initializers. +// A 17 digit constant guarantees exact results. +const double FLT_EPSILON_SQRT = 0.00034526697709225118; // sqrt(FLT_EPSILON); +const double FLT_EPSILON_INVERSE = 1 / FLT_EPSILON; +const double DBL_EPSILON_ERR = DBL_EPSILON * 4; // FIXME: tune -- allow a few bits of error +const double DBL_EPSILON_SUBDIVIDE_ERR = DBL_EPSILON * 16; +const double ROUGH_EPSILON = FLT_EPSILON * 64; +const double MORE_ROUGH_EPSILON = FLT_EPSILON * 256; +const double WAY_ROUGH_EPSILON = FLT_EPSILON * 2048; +const double BUMP_EPSILON = FLT_EPSILON * 4096; + +const SkScalar INVERSE_NUMBER_RANGE = FLT_EPSILON_ORDERABLE_ERR; + +inline bool zero_or_one(double x) { + return x == 0 || x == 1; +} + +inline bool approximately_zero(double x) { + return fabs(x) < FLT_EPSILON; +} + +inline bool precisely_zero(double x) { + return fabs(x) < DBL_EPSILON_ERR; +} + +inline bool precisely_subdivide_zero(double x) { + return fabs(x) < DBL_EPSILON_SUBDIVIDE_ERR; +} + +inline bool approximately_zero(float x) { + return fabs(x) < FLT_EPSILON; +} + +inline bool approximately_zero_half(double x) { + return fabs(x) < FLT_EPSILON_HALF; +} + +inline bool approximately_zero_double(double x) { + return fabs(x) < FLT_EPSILON_DOUBLE; +} + +inline bool approximately_zero_orderable(double x) { + return fabs(x) < FLT_EPSILON_ORDERABLE_ERR; +} + +inline bool approximately_zero_squared(double x) { + return fabs(x) < FLT_EPSILON_SQUARED; +} + +inline bool approximately_zero_sqrt(double x) { + return fabs(x) < FLT_EPSILON_SQRT; +} + +inline bool roughly_zero(double x) { + return fabs(x) < ROUGH_EPSILON; +} + +inline bool approximately_zero_inverse(double x) { + return fabs(x) > FLT_EPSILON_INVERSE; +} + +inline bool approximately_zero_when_compared_to(double x, double y) { + return x == 0 || fabs(x) < fabs(y * FLT_EPSILON); +} + +inline bool precisely_zero_when_compared_to(double x, double y) { + return x == 0 || fabs(x) < fabs(y * DBL_EPSILON); +} + +inline bool roughly_zero_when_compared_to(double x, double y) { + return x == 0 || fabs(x) < fabs(y * ROUGH_EPSILON); +} + +// Use this for comparing Ts in the range of 0 to 1. For general numbers (larger and smaller) use +// AlmostEqualUlps instead. +inline bool approximately_equal(double x, double y) { + return approximately_zero(x - y); +} + +inline bool precisely_equal(double x, double y) { + return precisely_zero(x - y); +} + +inline bool precisely_subdivide_equal(double x, double y) { + return precisely_subdivide_zero(x - y); +} + +inline bool approximately_equal_half(double x, double y) { + return approximately_zero_half(x - y); +} + +inline bool approximately_equal_double(double x, double y) { + return approximately_zero_double(x - y); +} + +inline bool approximately_equal_orderable(double x, double y) { + return approximately_zero_orderable(x - y); +} + +inline bool approximately_equal_squared(double x, double y) { + return approximately_equal(x, y); +} + +inline bool approximately_greater(double x, double y) { + return x - FLT_EPSILON >= y; +} + +inline bool approximately_greater_double(double x, double y) { + return x - FLT_EPSILON_DOUBLE >= y; +} + +inline bool approximately_greater_orderable(double x, double y) { + return x - FLT_EPSILON_ORDERABLE_ERR >= y; +} + +inline bool approximately_greater_or_equal(double x, double y) { + return x + FLT_EPSILON > y; +} + +inline bool approximately_greater_or_equal_double(double x, double y) { + return x + FLT_EPSILON_DOUBLE > y; +} + +inline bool approximately_greater_or_equal_orderable(double x, double y) { + return x + FLT_EPSILON_ORDERABLE_ERR > y; +} + +inline bool approximately_lesser(double x, double y) { + return x + FLT_EPSILON <= y; +} + +inline bool approximately_lesser_double(double x, double y) { + return x + FLT_EPSILON_DOUBLE <= y; +} + +inline bool approximately_lesser_orderable(double x, double y) { + return x + FLT_EPSILON_ORDERABLE_ERR <= y; +} + +inline bool approximately_lesser_or_equal(double x, double y) { + return x - FLT_EPSILON < y; +} + +inline bool approximately_lesser_or_equal_double(double x, double y) { + return x - FLT_EPSILON_DOUBLE < y; +} + +inline bool approximately_lesser_or_equal_orderable(double x, double y) { + return x - FLT_EPSILON_ORDERABLE_ERR < y; +} + +inline bool approximately_greater_than_one(double x) { + return x > 1 - FLT_EPSILON; +} + +inline bool precisely_greater_than_one(double x) { + return x > 1 - DBL_EPSILON_ERR; +} + +inline bool approximately_less_than_zero(double x) { + return x < FLT_EPSILON; +} + +inline bool precisely_less_than_zero(double x) { + return x < DBL_EPSILON_ERR; +} + +inline bool approximately_negative(double x) { + return x < FLT_EPSILON; +} + +inline bool approximately_negative_orderable(double x) { + return x < FLT_EPSILON_ORDERABLE_ERR; +} + +inline bool precisely_negative(double x) { + return x < DBL_EPSILON_ERR; +} + +inline bool approximately_one_or_less(double x) { + return x < 1 + FLT_EPSILON; +} + +inline bool approximately_one_or_less_double(double x) { + return x < 1 + FLT_EPSILON_DOUBLE; +} + +inline bool approximately_positive(double x) { + return x > -FLT_EPSILON; +} + +inline bool approximately_positive_squared(double x) { + return x > -(FLT_EPSILON_SQUARED); +} + +inline bool approximately_zero_or_more(double x) { + return x > -FLT_EPSILON; +} + +inline bool approximately_zero_or_more_double(double x) { + return x > -FLT_EPSILON_DOUBLE; +} + +inline bool approximately_between_orderable(double a, double b, double c) { + return a <= c + ? approximately_negative_orderable(a - b) && approximately_negative_orderable(b - c) + : approximately_negative_orderable(b - a) && approximately_negative_orderable(c - b); +} + +inline bool approximately_between(double a, double b, double c) { + return a <= c ? approximately_negative(a - b) && approximately_negative(b - c) + : approximately_negative(b - a) && approximately_negative(c - b); +} + +inline bool precisely_between(double a, double b, double c) { + return a <= c ? precisely_negative(a - b) && precisely_negative(b - c) + : precisely_negative(b - a) && precisely_negative(c - b); +} + +// returns true if (a <= b <= c) || (a >= b >= c) +inline bool between(double a, double b, double c) { + SkASSERT(((a <= b && b <= c) || (a >= b && b >= c)) == ((a - b) * (c - b) <= 0) + || (precisely_zero(a) && precisely_zero(b) && precisely_zero(c))); + return (a - b) * (c - b) <= 0; +} + +inline bool roughly_equal(double x, double y) { + return fabs(x - y) < ROUGH_EPSILON; +} + +inline bool roughly_negative(double x) { + return x < ROUGH_EPSILON; +} + +inline bool roughly_between(double a, double b, double c) { + return a <= c ? roughly_negative(a - b) && roughly_negative(b - c) + : roughly_negative(b - a) && roughly_negative(c - b); +} + +inline bool more_roughly_equal(double x, double y) { + return fabs(x - y) < MORE_ROUGH_EPSILON; +} + +inline SkPath::Verb SkPathOpsPointsToVerb(int points) { + int verb = (1 << points) >> 1; +#ifdef SK_DEBUG + switch (points) { + case 0: SkASSERT(SkPath::kMove_Verb == verb); break; + case 1: SkASSERT(SkPath::kLine_Verb == verb); break; + case 2: SkASSERT(SkPath::kQuad_Verb == verb); break; + case 3: SkASSERT(SkPath::kCubic_Verb == verb); break; + default: SkDEBUGFAIL("should not be here"); + } +#endif + return (SkPath::Verb)verb; +} + +inline int SkPathOpsVerbToPoints(SkPath::Verb verb) { + int points = (int) verb - (((int) verb + 1) >> 2); +#ifdef SK_DEBUG + switch (verb) { + case SkPath::kLine_Verb: SkASSERT(1 == points); break; + case SkPath::kQuad_Verb: SkASSERT(2 == points); break; + case SkPath::kConic_Verb: SkASSERT(2 == points); break; + case SkPath::kCubic_Verb: SkASSERT(3 == points); break; + default: SkDEBUGFAIL("should not get here"); + } +#endif + return points; +} + +inline double SkDInterp(double A, double B, double t) { + return A + (B - A) * t; +} + +/* Returns -1 if negative, 0 if zero, 1 if positive +*/ +inline int SkDSign(double x) { + return (x > 0) - (x < 0); +} + +/* Returns 0 if negative, 1 if zero, 2 if positive +*/ +inline int SKDSide(double x) { + return (x > 0) + (x >= 0); +} + +/* Returns 1 if negative, 2 if zero, 4 if positive +*/ +inline int SkDSideBit(double x) { + return 1 << SKDSide(x); +} + +inline double SkPinT(double t) { + return precisely_less_than_zero(t) ? 0 : precisely_greater_than_one(t) ? 1 : t; +} + +#endif diff --git a/gfx/skia/skia/src/pathops/SkPathOpsWinding.cpp b/gfx/skia/skia/src/pathops/SkPathOpsWinding.cpp new file mode 100644 index 0000000000..16517445af --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathOpsWinding.cpp @@ -0,0 +1,441 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// given a prospective edge, compute its initial winding by projecting a ray +// if the ray hits another edge + // if the edge doesn't have a winding yet, hop up to that edge and start over + // concern : check for hops forming a loop + // if the edge is unsortable, or + // the intersection is nearly at the ends, or + // the tangent at the intersection is nearly coincident to the ray, + // choose a different ray and try again + // concern : if it is unable to succeed after N tries, try another edge? direction? +// if no edge is hit, compute the winding directly + +// given the top span, project the most perpendicular ray and look for intersections + // let's try up and then down. What the hey + +// bestXY is initialized by caller with basePt + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTArray.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkTSort.h" +#include "src/pathops/SkOpContour.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsBounds.h" +#include "src/pathops/SkPathOpsCurve.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +enum class SkOpRayDir { + kLeft, + kTop, + kRight, + kBottom, +}; + +#if DEBUG_WINDING +const char* gDebugRayDirName[] = { + "kLeft", + "kTop", + "kRight", + "kBottom" +}; +#endif + +static int xy_index(SkOpRayDir dir) { + return static_cast(dir) & 1; +} + +static SkScalar pt_xy(const SkPoint& pt, SkOpRayDir dir) { + return (&pt.fX)[xy_index(dir)]; +} + +static SkScalar pt_yx(const SkPoint& pt, SkOpRayDir dir) { + return (&pt.fX)[!xy_index(dir)]; +} + +static double pt_dxdy(const SkDVector& v, SkOpRayDir dir) { + return (&v.fX)[xy_index(dir)]; +} + +static double pt_dydx(const SkDVector& v, SkOpRayDir dir) { + return (&v.fX)[!xy_index(dir)]; +} + +static SkScalar rect_side(const SkRect& r, SkOpRayDir dir) { + return (&r.fLeft)[static_cast(dir)]; +} + +static bool sideways_overlap(const SkRect& rect, const SkPoint& pt, SkOpRayDir dir) { + int i = !xy_index(dir); + return approximately_between((&rect.fLeft)[i], (&pt.fX)[i], (&rect.fRight)[i]); +} + +static bool less_than(SkOpRayDir dir) { + return static_cast((static_cast(dir) & 2) == 0); +} + +static bool ccw_dxdy(const SkDVector& v, SkOpRayDir dir) { + bool vPartPos = pt_dydx(v, dir) > 0; + bool leftBottom = ((static_cast(dir) + 1) & 2) != 0; + return vPartPos == leftBottom; +} + +struct SkOpRayHit { + SkOpRayDir makeTestBase(SkOpSpan* span, double t) { + fNext = nullptr; + fSpan = span; + fT = span->t() * (1 - t) + span->next()->t() * t; + SkOpSegment* segment = span->segment(); + fSlope = segment->dSlopeAtT(fT); + fPt = segment->ptAtT(fT); + fValid = true; + return fabs(fSlope.fX) < fabs(fSlope.fY) ? SkOpRayDir::kLeft : SkOpRayDir::kTop; + } + + SkOpRayHit* fNext; + SkOpSpan* fSpan; + SkPoint fPt; + double fT; + SkDVector fSlope; + bool fValid; +}; + +void SkOpContour::rayCheck(const SkOpRayHit& base, SkOpRayDir dir, SkOpRayHit** hits, + SkArenaAlloc* allocator) { + // if the bounds extreme is outside the best, we're done + SkScalar baseXY = pt_xy(base.fPt, dir); + SkScalar boundsXY = rect_side(fBounds, dir); + bool checkLessThan = less_than(dir); + if (!approximately_equal(baseXY, boundsXY) && (baseXY < boundsXY) == checkLessThan) { + return; + } + SkOpSegment* testSegment = &fHead; + do { + testSegment->rayCheck(base, dir, hits, allocator); + } while ((testSegment = testSegment->next())); +} + +void SkOpSegment::rayCheck(const SkOpRayHit& base, SkOpRayDir dir, SkOpRayHit** hits, + SkArenaAlloc* allocator) { + if (!sideways_overlap(fBounds, base.fPt, dir)) { + return; + } + SkScalar baseXY = pt_xy(base.fPt, dir); + SkScalar boundsXY = rect_side(fBounds, dir); + bool checkLessThan = less_than(dir); + if (!approximately_equal(baseXY, boundsXY) && (baseXY < boundsXY) == checkLessThan) { + return; + } + double tVals[3]; + SkScalar baseYX = pt_yx(base.fPt, dir); + int roots = (*CurveIntercept[fVerb * 2 + xy_index(dir)])(fPts, fWeight, baseYX, tVals); + for (int index = 0; index < roots; ++index) { + double t = tVals[index]; + if (base.fSpan->segment() == this && approximately_equal(base.fT, t)) { + continue; + } + SkDVector slope; + SkPoint pt; + SkDEBUGCODE(sk_bzero(&slope, sizeof(slope))); + bool valid = false; + if (approximately_zero(t)) { + pt = fPts[0]; + } else if (approximately_equal(t, 1)) { + pt = fPts[SkPathOpsVerbToPoints(fVerb)]; + } else { + SkASSERT(between(0, t, 1)); + pt = this->ptAtT(t); + if (SkDPoint::ApproximatelyEqual(pt, base.fPt)) { + if (base.fSpan->segment() == this) { + continue; + } + } else { + SkScalar ptXY = pt_xy(pt, dir); + if (!approximately_equal(baseXY, ptXY) && (baseXY < ptXY) == checkLessThan) { + continue; + } + slope = this->dSlopeAtT(t); + if (fVerb == SkPath::kCubic_Verb && base.fSpan->segment() == this + && roughly_equal(base.fT, t) + && SkDPoint::RoughlyEqual(pt, base.fPt)) { + #if DEBUG_WINDING + SkDebugf("%s (rarely expect this)\n", __FUNCTION__); + #endif + continue; + } + if (fabs(pt_dydx(slope, dir) * 10000) > fabs(pt_dxdy(slope, dir))) { + valid = true; + } + } + } + SkOpSpan* span = this->windingSpanAtT(t); + if (!span) { + valid = false; + } else if (!span->windValue() && !span->oppValue()) { + continue; + } + SkOpRayHit* newHit = allocator->make(); + newHit->fNext = *hits; + newHit->fPt = pt; + newHit->fSlope = slope; + newHit->fSpan = span; + newHit->fT = t; + newHit->fValid = valid; + *hits = newHit; + } +} + +SkOpSpan* SkOpSegment::windingSpanAtT(double tHit) { + SkOpSpan* span = &fHead; + SkOpSpanBase* next; + do { + next = span->next(); + if (approximately_equal(tHit, next->t())) { + return nullptr; + } + if (tHit < next->t()) { + return span; + } + } while (!next->final() && (span = next->upCast())); + return nullptr; +} + +static bool hit_compare_x(const SkOpRayHit* a, const SkOpRayHit* b) { + return a->fPt.fX < b->fPt.fX; +} + +static bool reverse_hit_compare_x(const SkOpRayHit* a, const SkOpRayHit* b) { + return b->fPt.fX < a->fPt.fX; +} + +static bool hit_compare_y(const SkOpRayHit* a, const SkOpRayHit* b) { + return a->fPt.fY < b->fPt.fY; +} + +static bool reverse_hit_compare_y(const SkOpRayHit* a, const SkOpRayHit* b) { + return b->fPt.fY < a->fPt.fY; +} + +static double get_t_guess(int tTry, int* dirOffset) { + double t = 0.5; + *dirOffset = tTry & 1; + int tBase = tTry >> 1; + int tBits = 0; + while (tTry >>= 1) { + t /= 2; + ++tBits; + } + if (tBits) { + int tIndex = (tBase - 1) & ((1 << tBits) - 1); + t += t * 2 * tIndex; + } + return t; +} + +bool SkOpSpan::sortableTop(SkOpContour* contourHead) { + SkSTArenaAlloc<1024> allocator; + int dirOffset; + double t = get_t_guess(fTopTTry++, &dirOffset); + SkOpRayHit hitBase; + SkOpRayDir dir = hitBase.makeTestBase(this, t); + if (hitBase.fSlope.fX == 0 && hitBase.fSlope.fY == 0) { + return false; + } + SkOpRayHit* hitHead = &hitBase; + dir = static_cast(static_cast(dir) + dirOffset); + if (hitBase.fSpan && hitBase.fSpan->segment()->verb() > SkPath::kLine_Verb + && !pt_dydx(hitBase.fSlope, dir)) { + return false; + } + SkOpContour* contour = contourHead; + do { + if (!contour->count()) { + continue; + } + contour->rayCheck(hitBase, dir, &hitHead, &allocator); + } while ((contour = contour->next())); + // sort hits + SkSTArray<1, SkOpRayHit*> sorted; + SkOpRayHit* hit = hitHead; + while (hit) { + sorted.push_back(hit); + hit = hit->fNext; + } + int count = sorted.size(); + SkTQSort(sorted.begin(), sorted.end(), + xy_index(dir) ? less_than(dir) ? hit_compare_y : reverse_hit_compare_y + : less_than(dir) ? hit_compare_x : reverse_hit_compare_x); + // verify windings +#if DEBUG_WINDING + SkDebugf("%s dir=%s seg=%d t=%1.9g pt=(%1.9g,%1.9g)\n", __FUNCTION__, + gDebugRayDirName[static_cast(dir)], hitBase.fSpan->segment()->debugID(), + hitBase.fT, hitBase.fPt.fX, hitBase.fPt.fY); + for (int index = 0; index < count; ++index) { + hit = sorted[index]; + SkOpSpan* span = hit->fSpan; + SkOpSegment* hitSegment = span ? span->segment() : nullptr; + bool operand = span ? hitSegment->operand() : false; + bool ccw = ccw_dxdy(hit->fSlope, dir); + SkDebugf("%s [%d] valid=%d operand=%d span=%d ccw=%d ", __FUNCTION__, index, + hit->fValid, operand, span ? span->debugID() : -1, ccw); + if (span) { + hitSegment->dumpPtsInner(); + } + SkDebugf(" t=%1.9g pt=(%1.9g,%1.9g) slope=(%1.9g,%1.9g)\n", hit->fT, + hit->fPt.fX, hit->fPt.fY, hit->fSlope.fX, hit->fSlope.fY); + } +#endif + const SkPoint* last = nullptr; + int wind = 0; + int oppWind = 0; + for (int index = 0; index < count; ++index) { + hit = sorted[index]; + if (!hit->fValid) { + return false; + } + bool ccw = ccw_dxdy(hit->fSlope, dir); +// SkASSERT(!approximately_zero(hit->fT) || !hit->fValid); + SkOpSpan* span = hit->fSpan; + if (!span) { + return false; + } + SkOpSegment* hitSegment = span->segment(); + if (span->windValue() == 0 && span->oppValue() == 0) { + continue; + } + if (last && SkDPoint::ApproximatelyEqual(*last, hit->fPt)) { + return false; + } + if (index < count - 1) { + const SkPoint& next = sorted[index + 1]->fPt; + if (SkDPoint::ApproximatelyEqual(next, hit->fPt)) { + return false; + } + } + bool operand = hitSegment->operand(); + if (operand) { + using std::swap; + swap(wind, oppWind); + } + int lastWind = wind; + int lastOpp = oppWind; + int windValue = ccw ? -span->windValue() : span->windValue(); + int oppValue = ccw ? -span->oppValue() : span->oppValue(); + wind += windValue; + oppWind += oppValue; + bool sumSet = false; + int spanSum = span->windSum(); + int windSum = SkOpSegment::UseInnerWinding(lastWind, wind) ? wind : lastWind; + if (spanSum == SK_MinS32) { + span->setWindSum(windSum); + sumSet = true; + } else { + // the need for this condition suggests that UseInnerWinding is flawed + // happened when last = 1 wind = -1 +#if 0 + SkASSERT((hitSegment->isXor() ? (windSum & 1) == (spanSum & 1) : windSum == spanSum) + || (abs(wind) == abs(lastWind) + && (windSum ^ wind ^ lastWind) == spanSum)); +#endif + } + int oSpanSum = span->oppSum(); + int oppSum = SkOpSegment::UseInnerWinding(lastOpp, oppWind) ? oppWind : lastOpp; + if (oSpanSum == SK_MinS32) { + span->setOppSum(oppSum); + } else { +#if 0 + SkASSERT(hitSegment->oppXor() ? (oppSum & 1) == (oSpanSum & 1) : oppSum == oSpanSum + || (abs(oppWind) == abs(lastOpp) + && (oppSum ^ oppWind ^ lastOpp) == oSpanSum)); +#endif + } + if (sumSet) { + if (this->globalState()->phase() == SkOpPhase::kFixWinding) { + hitSegment->contour()->setCcw(ccw); + } else { + (void) hitSegment->markAndChaseWinding(span, span->next(), windSum, oppSum, nullptr); + (void) hitSegment->markAndChaseWinding(span->next(), span, windSum, oppSum, nullptr); + } + } + if (operand) { + using std::swap; + swap(wind, oppWind); + } + last = &hit->fPt; + this->globalState()->bumpNested(); + } + return true; +} + +SkOpSpan* SkOpSegment::findSortableTop(SkOpContour* contourHead) { + SkOpSpan* span = &fHead; + SkOpSpanBase* next; + do { + next = span->next(); + if (span->done()) { + continue; + } + if (span->windSum() != SK_MinS32) { + return span; + } + if (span->sortableTop(contourHead)) { + return span; + } + } while (!next->final() && (span = next->upCast())); + return nullptr; +} + +SkOpSpan* SkOpContour::findSortableTop(SkOpContour* contourHead) { + bool allDone = true; + if (fCount) { + SkOpSegment* testSegment = &fHead; + do { + if (testSegment->done()) { + continue; + } + allDone = false; + SkOpSpan* result = testSegment->findSortableTop(contourHead); + if (result) { + return result; + } + } while ((testSegment = testSegment->next())); + } + if (allDone) { + fDone = true; + } + return nullptr; +} + +SkOpSpan* FindSortableTop(SkOpContourHead* contourHead) { + for (int index = 0; index < SkOpGlobalState::kMaxWindingTries; ++index) { + SkOpContour* contour = contourHead; + do { + if (contour->done()) { + continue; + } + SkOpSpan* result = contour->findSortableTop(contourHead); + if (result) { + return result; + } + } while ((contour = contour->next())); + } + return nullptr; +} diff --git a/gfx/skia/skia/src/pathops/SkPathWriter.cpp b/gfx/skia/skia/src/pathops/SkPathWriter.cpp new file mode 100644 index 0000000000..9ded489834 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathWriter.cpp @@ -0,0 +1,434 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkPathWriter.h" + +#include "include/core/SkTypes.h" +#include "include/private/base/SkMath.h" +#include "src/base/SkTSort.h" +#include "src/pathops/SkOpSegment.h" +#include "src/pathops/SkOpSpan.h" +#include "src/pathops/SkPathOpsDebug.h" +#include "src/pathops/SkPathOpsTypes.h" + +// wrap path to keep track of whether the contour is initialized and non-empty +SkPathWriter::SkPathWriter(SkPath& path) + : fPathPtr(&path) +{ + init(); +} + +void SkPathWriter::close() { + if (fCurrent.isEmpty()) { + return; + } + SkASSERT(this->isClosed()); +#if DEBUG_PATH_CONSTRUCTION + SkDebugf("path.close();\n"); +#endif + fCurrent.close(); + fPathPtr->addPath(fCurrent); + fCurrent.reset(); + init(); +} + +void SkPathWriter::conicTo(const SkPoint& pt1, const SkOpPtT* pt2, SkScalar weight) { + SkPoint pt2pt = this->update(pt2); +#if DEBUG_PATH_CONSTRUCTION + SkDebugf("path.conicTo(%1.9g,%1.9g, %1.9g,%1.9g, %1.9g);\n", + pt1.fX, pt1.fY, pt2pt.fX, pt2pt.fY, weight); +#endif + fCurrent.conicTo(pt1, pt2pt, weight); +} + +void SkPathWriter::cubicTo(const SkPoint& pt1, const SkPoint& pt2, const SkOpPtT* pt3) { + SkPoint pt3pt = this->update(pt3); +#if DEBUG_PATH_CONSTRUCTION + SkDebugf("path.cubicTo(%1.9g,%1.9g, %1.9g,%1.9g, %1.9g,%1.9g);\n", + pt1.fX, pt1.fY, pt2.fX, pt2.fY, pt3pt.fX, pt3pt.fY); +#endif + fCurrent.cubicTo(pt1, pt2, pt3pt); +} + +bool SkPathWriter::deferredLine(const SkOpPtT* pt) { + SkASSERT(fFirstPtT); + SkASSERT(fDefer[0]); + if (fDefer[0] == pt) { + // FIXME: why we're adding a degenerate line? Caller should have preflighted this. + return true; + } + if (pt->contains(fDefer[0])) { + // FIXME: why we're adding a degenerate line? + return true; + } + if (this->matchedLast(pt)) { + return false; + } + if (fDefer[1] && this->changedSlopes(pt)) { + this->lineTo(); + fDefer[0] = fDefer[1]; + } + fDefer[1] = pt; + return true; +} + +void SkPathWriter::deferredMove(const SkOpPtT* pt) { + if (!fDefer[1]) { + fFirstPtT = fDefer[0] = pt; + return; + } + SkASSERT(fDefer[0]); + if (!this->matchedLast(pt)) { + this->finishContour(); + fFirstPtT = fDefer[0] = pt; + } +} + +void SkPathWriter::finishContour() { + if (!this->matchedLast(fDefer[0])) { + if (!fDefer[1]) { + return; + } + this->lineTo(); + } + if (fCurrent.isEmpty()) { + return; + } + if (this->isClosed()) { + this->close(); + } else { + SkASSERT(fDefer[1]); + fEndPtTs.push_back(fFirstPtT); + fEndPtTs.push_back(fDefer[1]); + fPartials.push_back(fCurrent); + this->init(); + } +} + +void SkPathWriter::init() { + fCurrent.reset(); + fFirstPtT = fDefer[0] = fDefer[1] = nullptr; +} + +bool SkPathWriter::isClosed() const { + return this->matchedLast(fFirstPtT); +} + +void SkPathWriter::lineTo() { + if (fCurrent.isEmpty()) { + this->moveTo(); + } +#if DEBUG_PATH_CONSTRUCTION + SkDebugf("path.lineTo(%1.9g,%1.9g);\n", fDefer[1]->fPt.fX, fDefer[1]->fPt.fY); +#endif + fCurrent.lineTo(fDefer[1]->fPt); +} + +bool SkPathWriter::matchedLast(const SkOpPtT* test) const { + if (test == fDefer[1]) { + return true; + } + if (!test) { + return false; + } + if (!fDefer[1]) { + return false; + } + return test->contains(fDefer[1]); +} + +void SkPathWriter::moveTo() { +#if DEBUG_PATH_CONSTRUCTION + SkDebugf("path.moveTo(%1.9g,%1.9g);\n", fFirstPtT->fPt.fX, fFirstPtT->fPt.fY); +#endif + fCurrent.moveTo(fFirstPtT->fPt); +} + +void SkPathWriter::quadTo(const SkPoint& pt1, const SkOpPtT* pt2) { + SkPoint pt2pt = this->update(pt2); +#if DEBUG_PATH_CONSTRUCTION + SkDebugf("path.quadTo(%1.9g,%1.9g, %1.9g,%1.9g);\n", + pt1.fX, pt1.fY, pt2pt.fX, pt2pt.fY); +#endif + fCurrent.quadTo(pt1, pt2pt); +} + +// if last point to be written matches the current path's first point, alter the +// last to avoid writing a degenerate lineTo when the path is closed +SkPoint SkPathWriter::update(const SkOpPtT* pt) { + if (!fDefer[1]) { + this->moveTo(); + } else if (!this->matchedLast(fDefer[0])) { + this->lineTo(); + } + SkPoint result = pt->fPt; + if (fFirstPtT && result != fFirstPtT->fPt && fFirstPtT->contains(pt)) { + result = fFirstPtT->fPt; + } + fDefer[0] = fDefer[1] = pt; // set both to know that there is not a pending deferred line + return result; +} + +bool SkPathWriter::someAssemblyRequired() { + this->finishContour(); + return !fEndPtTs.empty(); +} + +bool SkPathWriter::changedSlopes(const SkOpPtT* ptT) const { + if (matchedLast(fDefer[0])) { + return false; + } + SkVector deferDxdy = fDefer[1]->fPt - fDefer[0]->fPt; + SkVector lineDxdy = ptT->fPt - fDefer[1]->fPt; + return deferDxdy.fX * lineDxdy.fY != deferDxdy.fY * lineDxdy.fX; +} + +class DistanceLessThan { +public: + DistanceLessThan(double* distances) : fDistances(distances) { } + double* fDistances; + bool operator()(const int one, const int two) const { + return fDistances[one] < fDistances[two]; + } +}; + + /* + check start and end of each contour + if not the same, record them + match them up + connect closest + reassemble contour pieces into new path + */ +void SkPathWriter::assemble() { + if (!this->someAssemblyRequired()) { + return; + } +#if DEBUG_PATH_CONSTRUCTION + SkDebugf("%s\n", __FUNCTION__); +#endif + SkOpPtT const* const* runs = fEndPtTs.begin(); // starts, ends of partial contours + int endCount = fEndPtTs.size(); // all starts and ends + SkASSERT(endCount > 0); + SkASSERT(endCount == fPartials.size() * 2); +#if DEBUG_ASSEMBLE + for (int index = 0; index < endCount; index += 2) { + const SkOpPtT* eStart = runs[index]; + const SkOpPtT* eEnd = runs[index + 1]; + SkASSERT(eStart != eEnd); + SkASSERT(!eStart->contains(eEnd)); + SkDebugf("%s contour start=(%1.9g,%1.9g) end=(%1.9g,%1.9g)\n", __FUNCTION__, + eStart->fPt.fX, eStart->fPt.fY, eEnd->fPt.fX, eEnd->fPt.fY); + } +#endif + // lengthen any partial contour adjacent to a simple segment + for (int pIndex = 0; pIndex < endCount; pIndex++) { + SkOpPtT* opPtT = const_cast(runs[pIndex]); + SkPath p; + SkPathWriter partWriter(p); + do { + if (!zero_or_one(opPtT->fT)) { + break; + } + SkOpSpanBase* opSpanBase = opPtT->span(); + SkOpSpanBase* start = opPtT->fT ? opSpanBase->prev() : opSpanBase->upCast()->next(); + int step = opPtT->fT ? 1 : -1; + const SkOpSegment* opSegment = opSpanBase->segment(); + const SkOpSegment* nextSegment = opSegment->isSimple(&start, &step); + if (!nextSegment) { + break; + } + SkOpSpanBase* opSpanEnd = start->t() ? start->prev() : start->upCast()->next(); + if (start->starter(opSpanEnd)->alreadyAdded()) { + break; + } + nextSegment->addCurveTo(start, opSpanEnd, &partWriter); + opPtT = opSpanEnd->ptT(); + SkOpPtT** runsPtr = const_cast(&runs[pIndex]); + *runsPtr = opPtT; + } while (true); + partWriter.finishContour(); + const SkTArray& partPartials = partWriter.partials(); + if (partPartials.empty()) { + continue; + } + // if pIndex is even, reverse and prepend to fPartials; otherwise, append + SkPath& partial = const_cast(fPartials[pIndex >> 1]); + const SkPath& part = partPartials[0]; + if (pIndex & 1) { + partial.addPath(part, SkPath::kExtend_AddPathMode); + } else { + SkPath reverse; + reverse.reverseAddPath(part); + reverse.addPath(partial, SkPath::kExtend_AddPathMode); + partial = reverse; + } + } + SkTDArray sLink, eLink; + int linkCount = endCount / 2; // number of partial contours + sLink.append(linkCount); + eLink.append(linkCount); + int rIndex, iIndex; + for (rIndex = 0; rIndex < linkCount; ++rIndex) { + sLink[rIndex] = eLink[rIndex] = SK_MaxS32; + } + const int entries = endCount * (endCount - 1) / 2; // folded triangle + SkSTArray<8, double, true> distances(entries); + SkSTArray<8, int, true> sortedDist(entries); + SkSTArray<8, int, true> distLookup(entries); + int rRow = 0; + int dIndex = 0; + for (rIndex = 0; rIndex < endCount - 1; ++rIndex) { + const SkOpPtT* oPtT = runs[rIndex]; + for (iIndex = rIndex + 1; iIndex < endCount; ++iIndex) { + const SkOpPtT* iPtT = runs[iIndex]; + double dx = iPtT->fPt.fX - oPtT->fPt.fX; + double dy = iPtT->fPt.fY - oPtT->fPt.fY; + double dist = dx * dx + dy * dy; + distLookup.push_back(rRow + iIndex); + distances.push_back(dist); // oStart distance from iStart + sortedDist.push_back(dIndex++); + } + rRow += endCount; + } + SkASSERT(dIndex == entries); + SkTQSort(sortedDist.begin(), sortedDist.end(), DistanceLessThan(distances.begin())); + int remaining = linkCount; // number of start/end pairs + for (rIndex = 0; rIndex < entries; ++rIndex) { + int pair = sortedDist[rIndex]; + pair = distLookup[pair]; + int row = pair / endCount; + int col = pair - row * endCount; + int ndxOne = row >> 1; + bool endOne = row & 1; + int* linkOne = endOne ? eLink.begin() : sLink.begin(); + if (linkOne[ndxOne] != SK_MaxS32) { + continue; + } + int ndxTwo = col >> 1; + bool endTwo = col & 1; + int* linkTwo = endTwo ? eLink.begin() : sLink.begin(); + if (linkTwo[ndxTwo] != SK_MaxS32) { + continue; + } + SkASSERT(&linkOne[ndxOne] != &linkTwo[ndxTwo]); + bool flip = endOne == endTwo; + linkOne[ndxOne] = flip ? ~ndxTwo : ndxTwo; + linkTwo[ndxTwo] = flip ? ~ndxOne : ndxOne; + if (!--remaining) { + break; + } + } + SkASSERT(!remaining); +#if DEBUG_ASSEMBLE + for (rIndex = 0; rIndex < linkCount; ++rIndex) { + int s = sLink[rIndex]; + int e = eLink[rIndex]; + SkDebugf("%s %c%d <- s%d - e%d -> %c%d\n", __FUNCTION__, s < 0 ? 's' : 'e', + s < 0 ? ~s : s, rIndex, rIndex, e < 0 ? 'e' : 's', e < 0 ? ~e : e); + } +#endif + rIndex = 0; + do { + bool forward = true; + bool first = true; + int sIndex = sLink[rIndex]; + SkASSERT(sIndex != SK_MaxS32); + sLink[rIndex] = SK_MaxS32; + int eIndex; + if (sIndex < 0) { + eIndex = sLink[~sIndex]; + sLink[~sIndex] = SK_MaxS32; + } else { + eIndex = eLink[sIndex]; + eLink[sIndex] = SK_MaxS32; + } + SkASSERT(eIndex != SK_MaxS32); +#if DEBUG_ASSEMBLE + SkDebugf("%s sIndex=%c%d eIndex=%c%d\n", __FUNCTION__, sIndex < 0 ? 's' : 'e', + sIndex < 0 ? ~sIndex : sIndex, eIndex < 0 ? 's' : 'e', + eIndex < 0 ? ~eIndex : eIndex); +#endif + do { + const SkPath& contour = fPartials[rIndex]; + if (!first) { + SkPoint prior, next; + if (!fPathPtr->getLastPt(&prior)) { + return; + } + if (forward) { + next = contour.getPoint(0); + } else { + SkAssertResult(contour.getLastPt(&next)); + } + if (prior != next) { + /* TODO: if there is a gap between open path written so far and path to come, + connect by following segments from one to the other, rather than introducing + a diagonal to connect the two. + */ + } + } + if (forward) { + fPathPtr->addPath(contour, + first ? SkPath::kAppend_AddPathMode : SkPath::kExtend_AddPathMode); + } else { + SkASSERT(!first); + fPathPtr->reversePathTo(contour); + } + if (first) { + first = false; + } +#if DEBUG_ASSEMBLE + SkDebugf("%s rIndex=%d eIndex=%s%d close=%d\n", __FUNCTION__, rIndex, + eIndex < 0 ? "~" : "", eIndex < 0 ? ~eIndex : eIndex, + sIndex == ((rIndex != eIndex) ^ forward ? eIndex : ~eIndex)); +#endif + if (sIndex == ((rIndex != eIndex) ^ forward ? eIndex : ~eIndex)) { + fPathPtr->close(); + break; + } + if (forward) { + eIndex = eLink[rIndex]; + SkASSERT(eIndex != SK_MaxS32); + eLink[rIndex] = SK_MaxS32; + if (eIndex >= 0) { + SkASSERT(sLink[eIndex] == rIndex); + sLink[eIndex] = SK_MaxS32; + } else { + SkASSERT(eLink[~eIndex] == ~rIndex); + eLink[~eIndex] = SK_MaxS32; + } + } else { + eIndex = sLink[rIndex]; + SkASSERT(eIndex != SK_MaxS32); + sLink[rIndex] = SK_MaxS32; + if (eIndex >= 0) { + SkASSERT(eLink[eIndex] == rIndex); + eLink[eIndex] = SK_MaxS32; + } else { + SkASSERT(sLink[~eIndex] == ~rIndex); + sLink[~eIndex] = SK_MaxS32; + } + } + rIndex = eIndex; + if (rIndex < 0) { + forward ^= 1; + rIndex = ~rIndex; + } + } while (true); + for (rIndex = 0; rIndex < linkCount; ++rIndex) { + if (sLink[rIndex] != SK_MaxS32) { + break; + } + } + } while (rIndex < linkCount); +#if DEBUG_ASSEMBLE + for (rIndex = 0; rIndex < linkCount; ++rIndex) { + SkASSERT(sLink[rIndex] == SK_MaxS32); + SkASSERT(eLink[rIndex] == SK_MaxS32); + } +#endif + return; +} diff --git a/gfx/skia/skia/src/pathops/SkPathWriter.h b/gfx/skia/skia/src/pathops/SkPathWriter.h new file mode 100644 index 0000000000..130301989e --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkPathWriter.h @@ -0,0 +1,56 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPathWriter_DEFINED +#define SkPathWriter_DEFINED + +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" + +class SkOpPtT; + +// Construct the path one contour at a time. +// If the contour is closed, copy it to the final output. +// Otherwise, keep the partial contour for later assembly. + +class SkPathWriter { +public: + SkPathWriter(SkPath& path); + void assemble(); + void conicTo(const SkPoint& pt1, const SkOpPtT* pt2, SkScalar weight); + void cubicTo(const SkPoint& pt1, const SkPoint& pt2, const SkOpPtT* pt3); + bool deferredLine(const SkOpPtT* pt); + void deferredMove(const SkOpPtT* pt); + void finishContour(); + bool hasMove() const { return !fFirstPtT; } + void init(); + bool isClosed() const; + const SkPath* nativePath() const { return fPathPtr; } + void quadTo(const SkPoint& pt1, const SkOpPtT* pt2); + +private: + bool changedSlopes(const SkOpPtT* pt) const; + void close(); + const SkTDArray& endPtTs() const { return fEndPtTs; } + void lineTo(); + bool matchedLast(const SkOpPtT*) const; + void moveTo(); + const SkTArray& partials() const { return fPartials; } + bool someAssemblyRequired(); + SkPoint update(const SkOpPtT* pt); + + SkPath fCurrent; // contour under construction + SkTArray fPartials; // contours with mismatched starts and ends + SkTDArray fEndPtTs; // possible pt values for partial starts and ends + SkPath* fPathPtr; // closed contours are written here + const SkOpPtT* fDefer[2]; // [0] deferred move, [1] deferred line + const SkOpPtT* fFirstPtT; // first in current contour +}; + +#endif /* defined(__PathOps__SkPathWriter__) */ diff --git a/gfx/skia/skia/src/pathops/SkReduceOrder.cpp b/gfx/skia/skia/src/pathops/SkReduceOrder.cpp new file mode 100644 index 0000000000..fbde6be9c6 --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkReduceOrder.cpp @@ -0,0 +1,290 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/pathops/SkReduceOrder.h" + +#include "include/core/SkPoint.h" +#include "src/core/SkGeometry.h" +#include "src/pathops/SkPathOpsPoint.h" +#include "src/pathops/SkPathOpsTypes.h" + +#include +#include + +int SkReduceOrder::reduce(const SkDLine& line) { + fLine[0] = line[0]; + int different = line[0] != line[1]; + fLine[1] = line[different]; + return 1 + different; +} + +static int coincident_line(const SkDQuad& quad, SkDQuad& reduction) { + reduction[0] = reduction[1] = quad[0]; + return 1; +} + +static int reductionLineCount(const SkDQuad& reduction) { + return 1 + !reduction[0].approximatelyEqual(reduction[1]); +} + +static int vertical_line(const SkDQuad& quad, SkDQuad& reduction) { + reduction[0] = quad[0]; + reduction[1] = quad[2]; + return reductionLineCount(reduction); +} + +static int horizontal_line(const SkDQuad& quad, SkDQuad& reduction) { + reduction[0] = quad[0]; + reduction[1] = quad[2]; + return reductionLineCount(reduction); +} + +static int check_linear(const SkDQuad& quad, + int minX, int maxX, int minY, int maxY, SkDQuad& reduction) { + if (!quad.isLinear(0, 2)) { + return 0; + } + // four are colinear: return line formed by outside + reduction[0] = quad[0]; + reduction[1] = quad[2]; + return reductionLineCount(reduction); +} + +// reduce to a quadratic or smaller +// look for identical points +// look for all four points in a line + // note that three points in a line doesn't simplify a cubic +// look for approximation with single quadratic + // save approximation with multiple quadratics for later +int SkReduceOrder::reduce(const SkDQuad& quad) { + int index, minX, maxX, minY, maxY; + int minXSet, minYSet; + minX = maxX = minY = maxY = 0; + minXSet = minYSet = 0; + for (index = 1; index < 3; ++index) { + if (quad[minX].fX > quad[index].fX) { + minX = index; + } + if (quad[minY].fY > quad[index].fY) { + minY = index; + } + if (quad[maxX].fX < quad[index].fX) { + maxX = index; + } + if (quad[maxY].fY < quad[index].fY) { + maxY = index; + } + } + for (index = 0; index < 3; ++index) { + if (AlmostEqualUlps(quad[index].fX, quad[minX].fX)) { + minXSet |= 1 << index; + } + if (AlmostEqualUlps(quad[index].fY, quad[minY].fY)) { + minYSet |= 1 << index; + } + } + if ((minXSet & 0x05) == 0x5 && (minYSet & 0x05) == 0x5) { // test for degenerate + // this quad starts and ends at the same place, so never contributes + // to the fill + return coincident_line(quad, fQuad); + } + if (minXSet == 0x7) { // test for vertical line + return vertical_line(quad, fQuad); + } + if (minYSet == 0x7) { // test for horizontal line + return horizontal_line(quad, fQuad); + } + int result = check_linear(quad, minX, maxX, minY, maxY, fQuad); + if (result) { + return result; + } + fQuad = quad; + return 3; +} + +//////////////////////////////////////////////////////////////////////////////////// + +static int coincident_line(const SkDCubic& cubic, SkDCubic& reduction) { + reduction[0] = reduction[1] = cubic[0]; + return 1; +} + +static int reductionLineCount(const SkDCubic& reduction) { + return 1 + !reduction[0].approximatelyEqual(reduction[1]); +} + +static int vertical_line(const SkDCubic& cubic, SkDCubic& reduction) { + reduction[0] = cubic[0]; + reduction[1] = cubic[3]; + return reductionLineCount(reduction); +} + +static int horizontal_line(const SkDCubic& cubic, SkDCubic& reduction) { + reduction[0] = cubic[0]; + reduction[1] = cubic[3]; + return reductionLineCount(reduction); +} + +// check to see if it is a quadratic or a line +static int check_quadratic(const SkDCubic& cubic, SkDCubic& reduction) { + double dx10 = cubic[1].fX - cubic[0].fX; + double dx23 = cubic[2].fX - cubic[3].fX; + double midX = cubic[0].fX + dx10 * 3 / 2; + double sideAx = midX - cubic[3].fX; + double sideBx = dx23 * 3 / 2; + if (approximately_zero(sideAx) ? !approximately_equal(sideAx, sideBx) + : !AlmostEqualUlps_Pin(sideAx, sideBx)) { + return 0; + } + double dy10 = cubic[1].fY - cubic[0].fY; + double dy23 = cubic[2].fY - cubic[3].fY; + double midY = cubic[0].fY + dy10 * 3 / 2; + double sideAy = midY - cubic[3].fY; + double sideBy = dy23 * 3 / 2; + if (approximately_zero(sideAy) ? !approximately_equal(sideAy, sideBy) + : !AlmostEqualUlps_Pin(sideAy, sideBy)) { + return 0; + } + reduction[0] = cubic[0]; + reduction[1].fX = midX; + reduction[1].fY = midY; + reduction[2] = cubic[3]; + return 3; +} + +static int check_linear(const SkDCubic& cubic, + int minX, int maxX, int minY, int maxY, SkDCubic& reduction) { + if (!cubic.isLinear(0, 3)) { + return 0; + } + // four are colinear: return line formed by outside + reduction[0] = cubic[0]; + reduction[1] = cubic[3]; + return reductionLineCount(reduction); +} + +/* food for thought: +http://objectmix.com/graphics/132906-fast-precision-driven-cubic-quadratic-piecewise-degree-reduction-algos-2-a.html + +Given points c1, c2, c3 and c4 of a cubic Bezier, the points of the +corresponding quadratic Bezier are (given in convex combinations of +points): + +q1 = (11/13)c1 + (3/13)c2 -(3/13)c3 + (2/13)c4 +q2 = -c1 + (3/2)c2 + (3/2)c3 - c4 +q3 = (2/13)c1 - (3/13)c2 + (3/13)c3 + (11/13)c4 + +Of course, this curve does not interpolate the end-points, but it would +be interesting to see the behaviour of such a curve in an applet. + +-- +Kalle Rutanen +http://kaba.hilvi.org + +*/ + +// reduce to a quadratic or smaller +// look for identical points +// look for all four points in a line + // note that three points in a line doesn't simplify a cubic +// look for approximation with single quadratic + // save approximation with multiple quadratics for later +int SkReduceOrder::reduce(const SkDCubic& cubic, Quadratics allowQuadratics) { + int index, minX, maxX, minY, maxY; + int minXSet, minYSet; + minX = maxX = minY = maxY = 0; + minXSet = minYSet = 0; + for (index = 1; index < 4; ++index) { + if (cubic[minX].fX > cubic[index].fX) { + minX = index; + } + if (cubic[minY].fY > cubic[index].fY) { + minY = index; + } + if (cubic[maxX].fX < cubic[index].fX) { + maxX = index; + } + if (cubic[maxY].fY < cubic[index].fY) { + maxY = index; + } + } + for (index = 0; index < 4; ++index) { + double cx = cubic[index].fX; + double cy = cubic[index].fY; + double denom = std::max(fabs(cx), std::max(fabs(cy), + std::max(fabs(cubic[minX].fX), fabs(cubic[minY].fY)))); + if (denom == 0) { + minXSet |= 1 << index; + minYSet |= 1 << index; + continue; + } + double inv = 1 / denom; + if (approximately_equal_half(cx * inv, cubic[minX].fX * inv)) { + minXSet |= 1 << index; + } + if (approximately_equal_half(cy * inv, cubic[minY].fY * inv)) { + minYSet |= 1 << index; + } + } + if (minXSet == 0xF) { // test for vertical line + if (minYSet == 0xF) { // return 1 if all four are coincident + return coincident_line(cubic, fCubic); + } + return vertical_line(cubic, fCubic); + } + if (minYSet == 0xF) { // test for horizontal line + return horizontal_line(cubic, fCubic); + } + int result = check_linear(cubic, minX, maxX, minY, maxY, fCubic); + if (result) { + return result; + } + if (allowQuadratics == SkReduceOrder::kAllow_Quadratics + && (result = check_quadratic(cubic, fCubic))) { + return result; + } + fCubic = cubic; + return 4; +} + +SkPath::Verb SkReduceOrder::Quad(const SkPoint a[3], SkPoint* reducePts) { + SkDQuad quad; + quad.set(a); + SkReduceOrder reducer; + int order = reducer.reduce(quad); + if (order == 2) { // quad became line + for (int index = 0; index < order; ++index) { + *reducePts++ = reducer.fLine[index].asSkPoint(); + } + } + return SkPathOpsPointsToVerb(order - 1); +} + +SkPath::Verb SkReduceOrder::Conic(const SkConic& c, SkPoint* reducePts) { + SkPath::Verb verb = SkReduceOrder::Quad(c.fPts, reducePts); + if (verb > SkPath::kLine_Verb && c.fW == 1) { + return SkPath::kQuad_Verb; + } + return verb == SkPath::kQuad_Verb ? SkPath::kConic_Verb : verb; +} + +SkPath::Verb SkReduceOrder::Cubic(const SkPoint a[4], SkPoint* reducePts) { + if (SkDPoint::ApproximatelyEqual(a[0], a[1]) && SkDPoint::ApproximatelyEqual(a[0], a[2]) + && SkDPoint::ApproximatelyEqual(a[0], a[3])) { + reducePts[0] = a[0]; + return SkPath::kMove_Verb; + } + SkDCubic cubic; + cubic.set(a); + SkReduceOrder reducer; + int order = reducer.reduce(cubic, kAllow_Quadratics); + if (order == 2 || order == 3) { // cubic became line or quad + for (int index = 0; index < order; ++index) { + *reducePts++ = reducer.fQuad[index].asSkPoint(); + } + } + return SkPathOpsPointsToVerb(order - 1); +} diff --git a/gfx/skia/skia/src/pathops/SkReduceOrder.h b/gfx/skia/skia/src/pathops/SkReduceOrder.h new file mode 100644 index 0000000000..17acc8d78e --- /dev/null +++ b/gfx/skia/skia/src/pathops/SkReduceOrder.h @@ -0,0 +1,37 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkReduceOrder_DEFINED +#define SkReduceOrder_DEFINED + +#include "include/core/SkPath.h" +#include "src/pathops/SkPathOpsCubic.h" +#include "src/pathops/SkPathOpsLine.h" +#include "src/pathops/SkPathOpsQuad.h" + +struct SkConic; +struct SkPoint; + +union SkReduceOrder { + enum Quadratics { + kNo_Quadratics, + kAllow_Quadratics + }; + + int reduce(const SkDCubic& cubic, Quadratics); + int reduce(const SkDLine& line); + int reduce(const SkDQuad& quad); + + static SkPath::Verb Conic(const SkConic& conic, SkPoint* reducePts); + static SkPath::Verb Cubic(const SkPoint pts[4], SkPoint* reducePts); + static SkPath::Verb Quad(const SkPoint pts[3], SkPoint* reducePts); + + SkDLine fLine; + SkDQuad fQuad; + SkDCubic fCubic; +}; + +#endif diff --git a/gfx/skia/skia/src/pdf/SkBitmapKey.h b/gfx/skia/skia/src/pdf/SkBitmapKey.h new file mode 100644 index 0000000000..72df0c7abe --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkBitmapKey.h @@ -0,0 +1,22 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkBitmapKey_DEFINED +#define SkBitmapKey_DEFINED + +#include "include/core/SkRect.h" + +struct SkBitmapKey { + SkIRect fSubset; + uint32_t fID; + bool operator==(const SkBitmapKey& rhs) const { + return fID == rhs.fID && fSubset == rhs.fSubset; + } + bool operator!=(const SkBitmapKey& rhs) const { return !(*this == rhs); } +}; + + +#endif // SkBitmapKey_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkClusterator.cpp b/gfx/skia/skia/src/pdf/SkClusterator.cpp new file mode 100644 index 0000000000..5eaed752da --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkClusterator.cpp @@ -0,0 +1,64 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkClusterator.h" + +#include "include/private/base/SkTo.h" +#include "src/base/SkUTF.h" +#include "src/text/GlyphRun.h" + +static bool is_reversed(const uint32_t* clusters, uint32_t count) { + // "ReversedChars" is how PDF deals with RTL text. + // return true if more than one cluster and monotonicly decreasing to zero. + if (count < 2 || clusters[0] == 0 || clusters[count - 1] != 0) { + return false; + } + for (uint32_t i = 0; i + 1 < count; ++i) { + if (clusters[i + 1] > clusters[i]) { + return false; + } + } + return true; +} + +SkClusterator::SkClusterator(const sktext::GlyphRun& run) + : fClusters(run.clusters().data()) + , fUtf8Text(run.text().data()) + , fGlyphCount(SkToU32(run.glyphsIDs().size())) + , fTextByteLength(SkToU32(run.text().size())) + , fReversedChars(fClusters ? is_reversed(fClusters, fGlyphCount) : false) +{ + if (fClusters) { + SkASSERT(fUtf8Text && fTextByteLength > 0 && fGlyphCount > 0); + } else { + SkASSERT(!fUtf8Text && fTextByteLength == 0); + } +} + +SkClusterator::Cluster SkClusterator::next() { + if (fCurrentGlyphIndex >= fGlyphCount) { + return Cluster{nullptr, 0, 0, 0}; + } + if (!fClusters || !fUtf8Text) { + return Cluster{nullptr, 0, fCurrentGlyphIndex++, 1}; + } + uint32_t clusterGlyphIndex = fCurrentGlyphIndex; + uint32_t cluster = fClusters[clusterGlyphIndex]; + do { + ++fCurrentGlyphIndex; + } while (fCurrentGlyphIndex < fGlyphCount && cluster == fClusters[fCurrentGlyphIndex]); + uint32_t clusterGlyphCount = fCurrentGlyphIndex - clusterGlyphIndex; + uint32_t clusterEnd = fTextByteLength; + for (unsigned i = 0; i < fGlyphCount; ++i) { + uint32_t c = fClusters[i]; + if (c > cluster && c < clusterEnd) { + clusterEnd = c; + } + } + uint32_t clusterLen = clusterEnd - cluster; + return Cluster{fUtf8Text + cluster, clusterLen, clusterGlyphIndex, clusterGlyphCount}; +} diff --git a/gfx/skia/skia/src/pdf/SkClusterator.h b/gfx/skia/skia/src/pdf/SkClusterator.h new file mode 100644 index 0000000000..86fd6cdfdf --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkClusterator.h @@ -0,0 +1,47 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkClusterator_DEFINED +#define SkClusterator_DEFINED + +#include +#include + +namespace sktext { +class GlyphRun; +} + +/** Given the m-to-n glyph-to-character mapping data (as returned by + harfbuzz), iterate over the clusters. */ +class SkClusterator { +public: + SkClusterator(const sktext::GlyphRun& run); + uint32_t glyphCount() const { return fGlyphCount; } + bool reversedChars() const { return fReversedChars; } + struct Cluster { + const char* fUtf8Text; + uint32_t fTextByteLength; + uint32_t fGlyphIndex; + uint32_t fGlyphCount; + explicit operator bool() const { return fGlyphCount != 0; } + bool operator==(const SkClusterator::Cluster& o) { + return fUtf8Text == o.fUtf8Text + && fTextByteLength == o.fTextByteLength + && fGlyphIndex == o.fGlyphIndex + && fGlyphCount == o.fGlyphCount; + } + }; + Cluster next(); + +private: + uint32_t const * const fClusters; + char const * const fUtf8Text; + uint32_t const fGlyphCount; + uint32_t const fTextByteLength; + bool const fReversedChars; + uint32_t fCurrentGlyphIndex = 0; +}; +#endif // SkClusterator_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkDeflate.cpp b/gfx/skia/skia/src/pdf/SkDeflate.cpp new file mode 100644 index 0000000000..f044c140fa --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkDeflate.cpp @@ -0,0 +1,134 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkDeflate.h" + +#include "include/core/SkData.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkTraceEvent.h" + +#include "zlib.h" + +#include + +namespace { + +// Different zlib implementations use different T. +// We've seen size_t and unsigned. +template void* skia_alloc_func(void*, T items, T size) { + return sk_calloc_throw(SkToSizeT(items) * SkToSizeT(size)); +} + +void skia_free_func(void*, void* address) { sk_free(address); } + +} // namespace + +#define SKDEFLATEWSTREAM_INPUT_BUFFER_SIZE 4096 +#define SKDEFLATEWSTREAM_OUTPUT_BUFFER_SIZE 4224 // 4096 + 128, usually big + // enough to always do a + // single loop. + +// called by both write() and finalize() +static void do_deflate(int flush, + z_stream* zStream, + SkWStream* out, + unsigned char* inBuffer, + size_t inBufferSize) { + zStream->next_in = inBuffer; + zStream->avail_in = SkToInt(inBufferSize); + unsigned char outBuffer[SKDEFLATEWSTREAM_OUTPUT_BUFFER_SIZE]; + SkDEBUGCODE(int returnValue;) + do { + zStream->next_out = outBuffer; + zStream->avail_out = sizeof(outBuffer); + SkDEBUGCODE(returnValue =) deflate(zStream, flush); + SkASSERT(!zStream->msg); + + out->write(outBuffer, sizeof(outBuffer) - zStream->avail_out); + } while (zStream->avail_in || !zStream->avail_out); + SkASSERT(flush == Z_FINISH + ? returnValue == Z_STREAM_END + : returnValue == Z_OK); +} + +// Hide all zlib impl details. +struct SkDeflateWStream::Impl { + SkWStream* fOut; + unsigned char fInBuffer[SKDEFLATEWSTREAM_INPUT_BUFFER_SIZE]; + size_t fInBufferIndex; + z_stream fZStream; +}; + +SkDeflateWStream::SkDeflateWStream(SkWStream* out, + int compressionLevel, + bool gzip) + : fImpl(std::make_unique()) { + + // There has existed at some point at least one zlib implementation which thought it was being + // clever by randomizing the compression level. This is actually not entirely incorrect, except + // for the no-compression level which should always be deterministically pass-through. + // Users should instead consider the zero compression level broken and handle it themselves. + SkASSERT(compressionLevel != 0); + + fImpl->fOut = out; + fImpl->fInBufferIndex = 0; + if (!fImpl->fOut) { + return; + } + fImpl->fZStream.next_in = nullptr; + fImpl->fZStream.zalloc = &skia_alloc_func; + fImpl->fZStream.zfree = &skia_free_func; + fImpl->fZStream.opaque = nullptr; + SkASSERT(compressionLevel <= 9 && compressionLevel >= -1); + SkDEBUGCODE(int r =) deflateInit2(&fImpl->fZStream, compressionLevel, + Z_DEFLATED, gzip ? 0x1F : 0x0F, + 8, Z_DEFAULT_STRATEGY); + SkASSERT(Z_OK == r); +} + +SkDeflateWStream::~SkDeflateWStream() { this->finalize(); } + +void SkDeflateWStream::finalize() { + TRACE_EVENT0("skia", TRACE_FUNC); + if (!fImpl->fOut) { + return; + } + do_deflate(Z_FINISH, &fImpl->fZStream, fImpl->fOut, fImpl->fInBuffer, + fImpl->fInBufferIndex); + (void)deflateEnd(&fImpl->fZStream); + fImpl->fOut = nullptr; +} + +bool SkDeflateWStream::write(const void* void_buffer, size_t len) { + TRACE_EVENT0("skia", TRACE_FUNC); + if (!fImpl->fOut) { + return false; + } + const char* buffer = (const char*)void_buffer; + while (len > 0) { + size_t tocopy = + std::min(len, sizeof(fImpl->fInBuffer) - fImpl->fInBufferIndex); + memcpy(fImpl->fInBuffer + fImpl->fInBufferIndex, buffer, tocopy); + len -= tocopy; + buffer += tocopy; + fImpl->fInBufferIndex += tocopy; + SkASSERT(fImpl->fInBufferIndex <= sizeof(fImpl->fInBuffer)); + + // if the buffer isn't filled, don't call into zlib yet. + if (sizeof(fImpl->fInBuffer) == fImpl->fInBufferIndex) { + do_deflate(Z_NO_FLUSH, &fImpl->fZStream, fImpl->fOut, + fImpl->fInBuffer, fImpl->fInBufferIndex); + fImpl->fInBufferIndex = 0; + } + } + return true; +} + +size_t SkDeflateWStream::bytesWritten() const { + return fImpl->fZStream.total_in + fImpl->fInBufferIndex; +} diff --git a/gfx/skia/skia/src/pdf/SkDeflate.h b/gfx/skia/skia/src/pdf/SkDeflate.h new file mode 100644 index 0000000000..fdffd01380 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkDeflate.h @@ -0,0 +1,53 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkFlate_DEFINED +#define SkFlate_DEFINED + +#include "include/core/SkStream.h" + +/** + * Wrap a stream in this class to compress the information written to + * this stream using the Deflate algorithm. + * + * See http://en.wikipedia.org/wiki/DEFLATE + */ +class SkDeflateWStream final : public SkWStream { +public: + /** Does not take ownership of the stream. + + @param compressionLevel 1 is best speed; 9 is best compression. + The default, -1, is to use zlib's Z_DEFAULT_COMPRESSION level. + 0 would be no compression, but due to broken zlibs, users should handle that themselves. + + @param gzip iff true, output a gzip file. "The gzip format is + a wrapper, documented in RFC 1952, around a deflate stream." + gzip adds a header with a magic number to the beginning of the + stream, allowing a client to identify a gzip file. + */ + SkDeflateWStream(SkWStream*, + int compressionLevel, + bool gzip = false); + + /** The destructor calls finalize(). */ + ~SkDeflateWStream() override; + + /** Write the end of the compressed stream. All subsequent calls to + write() will fail. Subsequent calls to finalize() do nothing. */ + void finalize(); + + // The SkWStream interface: + bool write(const void*, size_t) override; + size_t bytesWritten() const override; + +private: + struct Impl; + std::unique_ptr fImpl; +}; + +#endif // SkFlate_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkDocument_PDF_None.cpp b/gfx/skia/skia/src/pdf/SkDocument_PDF_None.cpp new file mode 100644 index 0000000000..9593a5b52c --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkDocument_PDF_None.cpp @@ -0,0 +1,22 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkCanvas.h" +#include "include/core/SkData.h" +#include "include/docs/SkPDFDocument.h" + +class SkPDFArray {}; + +sk_sp SkPDF::MakeDocument(SkWStream*, const SkPDF::Metadata&) { return nullptr; } + +void SkPDF::SetNodeId(SkCanvas* c, int n) { + c->drawAnnotation({0, 0, 0, 0}, "PDF_Node_Key", SkData::MakeWithCopy(&n, sizeof(n)).get()); +} + +SkPDF::AttributeList::AttributeList() = default; + +SkPDF::AttributeList::~AttributeList() = default; diff --git a/gfx/skia/skia/src/pdf/SkJpegInfo.cpp b/gfx/skia/skia/src/pdf/SkJpegInfo.cpp new file mode 100644 index 0000000000..b0c72d011c --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkJpegInfo.cpp @@ -0,0 +1,128 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkJpegInfo.h" + +#include "include/private/base/SkTo.h" + +#ifndef SK_CODEC_DECODES_JPEG + +namespace { +class JpegSegment { +public: + JpegSegment(const void* data, size_t size) + : fData(static_cast(data)) + , fSize(size) + , fOffset(0) + , fLength(0) {} + bool read() { + if (!this->readBigendianUint16(&fMarker)) { + return false; + } + if (JpegSegment::StandAloneMarker(fMarker)) { + fLength = 0; + fBuffer = nullptr; + return true; + } + if (!this->readBigendianUint16(&fLength) || fLength < 2) { + return false; + } + fLength -= 2; // Length includes itself for some reason. + if (fOffset + fLength > fSize) { + return false; // Segment too long. + } + fBuffer = &fData[fOffset]; + fOffset += fLength; + return true; + } + + bool isSOF() { + return (fMarker & 0xFFF0) == 0xFFC0 && fMarker != 0xFFC4 && + fMarker != 0xFFC8 && fMarker != 0xFFCC; + } + uint16_t marker() { return fMarker; } + uint16_t length() { return fLength; } + const char* data() { return fBuffer; } + + static uint16_t GetBigendianUint16(const char* ptr) { + // "the most significant byte shall come first" + return (static_cast(ptr[0]) << 8) | + static_cast(ptr[1]); + } + +private: + const char* const fData; + const size_t fSize; + size_t fOffset; + const char* fBuffer; + uint16_t fMarker; + uint16_t fLength; + + bool readBigendianUint16(uint16_t* value) { + if (fOffset + 2 > fSize) { + return false; + } + *value = JpegSegment::GetBigendianUint16(&fData[fOffset]); + fOffset += 2; + return true; + } + static bool StandAloneMarker(uint16_t marker) { + // RST[m] markers or SOI, EOI, TEM + return (marker & 0xFFF8) == 0xFFD0 || marker == 0xFFD8 || + marker == 0xFFD9 || marker == 0xFF01; + } +}; +} // namespace + +bool SkGetJpegInfo(const void* data, size_t len, + SkISize* size, + SkEncodedInfo::Color* colorType, + SkEncodedOrigin* orientation) { + static const uint16_t kSOI = 0xFFD8; + static const uint16_t kAPP0 = 0xFFE0; + JpegSegment segment(data, len); + if (!segment.read() || segment.marker() != kSOI) { + return false; // not a JPEG + } + if (!segment.read() || segment.marker() != kAPP0) { + return false; // not an APP0 segment + } + static const char kJfif[] = {'J', 'F', 'I', 'F', '\0'}; + SkASSERT(segment.data()); + if (SkToSizeT(segment.length()) < sizeof(kJfif) || + 0 != memcmp(segment.data(), kJfif, sizeof(kJfif))) { + return false; // Not JFIF JPEG + } + do { + if (!segment.read()) { + return false; // malformed JPEG + } + } while (!segment.isSOF()); + if (segment.length() < 6) { + return false; // SOF segment is short + } + if (8 != segment.data()[0]) { + return false; // Only support 8-bit precision + } + int numberOfComponents = segment.data()[5]; + if (numberOfComponents != 1 && numberOfComponents != 3) { + return false; // Invalid JFIF + } + if (size) { + *size = {JpegSegment::GetBigendianUint16(&segment.data()[3]), + JpegSegment::GetBigendianUint16(&segment.data()[1])}; + } + if (colorType) { + *colorType = numberOfComponents == 3 ? SkEncodedInfo::kYUV_Color + : SkEncodedInfo::kGray_Color; + } + if (orientation) { + *orientation = kTopLeft_SkEncodedOrigin; + } + return true; +} +#endif // SK_CODEC_DECODES_JPEG diff --git a/gfx/skia/skia/src/pdf/SkJpegInfo.h b/gfx/skia/skia/src/pdf/SkJpegInfo.h new file mode 100644 index 0000000000..82a8a736fd --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkJpegInfo.h @@ -0,0 +1,25 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkJpegInfo_DEFINED +#define SkJpegInfo_DEFINED + +#include "include/codec/SkEncodedOrigin.h" +#include "include/core/SkSize.h" +#include "include/private/SkEncodedInfo.h" + +/** Returns true if the data seems to be a valid JPEG image with a known colorType. + + @param [out] size Image size in pixels + @param [out] colorType Encoded color type (kGray_Color, kYUV_Color, several others). + @param [out] orientation EXIF Orientation of the image. +*/ +bool SkGetJpegInfo(const void* data, size_t len, + SkISize* size, + SkEncodedInfo::Color* colorType, + SkEncodedOrigin* orientation); + +#endif // SkJpegInfo_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkKeyedImage.cpp b/gfx/skia/skia/src/pdf/SkKeyedImage.cpp new file mode 100644 index 0000000000..7b733d072a --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkKeyedImage.cpp @@ -0,0 +1,49 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkKeyedImage.h" + +#include "src/image/SkImage_Base.h" + +SkBitmapKey SkBitmapKeyFromImage(const SkImage* image) { + if (!image) { + return {{0, 0, 0, 0}, 0}; + } + if (const SkBitmap* bm = as_IB(image)->onPeekBitmap()) { + SkIPoint o = bm->pixelRefOrigin(); + return {image->bounds().makeOffset(o), bm->getGenerationID()}; + } + return {image->bounds(), image->uniqueID()}; +} + +SkKeyedImage::SkKeyedImage(sk_sp i) : fImage(std::move(i)) { + fKey = SkBitmapKeyFromImage(fImage.get()); +} + +SkKeyedImage::SkKeyedImage(const SkBitmap& bm) : fImage(bm.asImage()) { + if (fImage) { + fKey = {bm.getSubset(), bm.getGenerationID()}; + } +} + +SkKeyedImage SkKeyedImage::subset(SkIRect subset) const { + SkKeyedImage img; + if (fImage && subset.intersect(fImage->bounds())) { + img.fImage = fImage->makeSubset(subset); + if (img.fImage) { + img.fKey = {subset.makeOffset(fKey.fSubset.topLeft()), fKey.fID}; + } + } + return img; +} + +sk_sp SkKeyedImage::release() { + sk_sp image = std::move(fImage); + SkASSERT(nullptr == fImage); + fKey = {{0, 0, 0, 0}, 0}; + return image; +} diff --git a/gfx/skia/skia/src/pdf/SkKeyedImage.h b/gfx/skia/skia/src/pdf/SkKeyedImage.h new file mode 100644 index 0000000000..db7b09d7b6 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkKeyedImage.h @@ -0,0 +1,46 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkKeyedImage_DEFINED +#define SkKeyedImage_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkImage.h" +#include "src/pdf/SkBitmapKey.h" + +/** + This class has all the advantages of SkBitmaps and SkImages. + + The SkImage holds on to encoded data. The SkBitmapKey properly de-dups subsets. + */ +class SkKeyedImage { +public: + SkKeyedImage() {} + SkKeyedImage(sk_sp); + SkKeyedImage(const SkBitmap&); + SkKeyedImage(SkKeyedImage&&) = default; + SkKeyedImage(const SkKeyedImage&) = default; + + SkKeyedImage& operator=(SkKeyedImage&&) = default; + SkKeyedImage& operator=(const SkKeyedImage&) = default; + + explicit operator bool() const { return fImage != nullptr; } + const SkBitmapKey& key() const { return fKey; } + const sk_sp& image() const { return fImage; } + sk_sp release(); + SkKeyedImage subset(SkIRect subset) const; + +private: + sk_sp fImage; + SkBitmapKey fKey = {{0, 0, 0, 0}, 0}; +}; + +/** + * Given an Image, return the Bitmap Key that corresponds to it. If the Image + * wraps a Bitmap, use that Bitmap's key. + */ +SkBitmapKey SkBitmapKeyFromImage(const SkImage*); +#endif // SkKeyedImage_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFBitmap.cpp b/gfx/skia/skia/src/pdf/SkPDFBitmap.cpp new file mode 100644 index 0000000000..888c09729e --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFBitmap.cpp @@ -0,0 +1,329 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFBitmap.h" + +#include "include/codec/SkEncodedImageFormat.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkData.h" +#include "include/core/SkExecutor.h" +#include "include/core/SkImage.h" +#include "include/core/SkStream.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/pdf/SkDeflate.h" +#include "src/pdf/SkJpegInfo.h" +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFTypes.h" +#include "src/pdf/SkPDFUtils.h" + +//////////////////////////////////////////////////////////////////////////////// + +// write a single byte to a stream n times. +static void fill_stream(SkWStream* out, char value, size_t n) { + char buffer[4096]; + memset(buffer, value, sizeof(buffer)); + for (size_t i = 0; i < n / sizeof(buffer); ++i) { + out->write(buffer, sizeof(buffer)); + } + out->write(buffer, n % sizeof(buffer)); +} + +/* It is necessary to average the color component of transparent + pixels with their surrounding neighbors since the PDF renderer may + separately re-sample the alpha and color channels when the image is + not displayed at its native resolution. Since an alpha of zero + gives no information about the color component, the pathological + case is a white image with sharp transparency bounds - the color + channel goes to black, and the should-be-transparent pixels are + rendered as grey because of the separate soft mask and color + resizing. e.g.: gm/bitmappremul.cpp */ +static SkColor get_neighbor_avg_color(const SkPixmap& bm, int xOrig, int yOrig) { + SkASSERT(kBGRA_8888_SkColorType == bm.colorType()); + unsigned r = 0, g = 0, b = 0, n = 0; + // Clamp the range to the edge of the bitmap. + int ymin = std::max(0, yOrig - 1); + int ymax = std::min(yOrig + 1, bm.height() - 1); + int xmin = std::max(0, xOrig - 1); + int xmax = std::min(xOrig + 1, bm.width() - 1); + for (int y = ymin; y <= ymax; ++y) { + const SkColor* scanline = bm.addr32(0, y); + for (int x = xmin; x <= xmax; ++x) { + SkColor color = scanline[x]; + if (color != SK_ColorTRANSPARENT) { + r += SkColorGetR(color); + g += SkColorGetG(color); + b += SkColorGetB(color); + n++; + } + } + } + return n > 0 ? SkColorSetRGB(SkToU8(r / n), SkToU8(g / n), SkToU8(b / n)) + : SK_ColorTRANSPARENT; +} + +namespace { +enum class SkPDFStreamFormat { DCT, Flate, Uncompressed }; +} + +template +static void emit_image_stream(SkPDFDocument* doc, + SkPDFIndirectReference ref, + T writeStream, + SkISize size, + const char* colorSpace, + SkPDFIndirectReference sMask, + int length, + SkPDFStreamFormat format) { + SkPDFDict pdfDict("XObject"); + pdfDict.insertName("Subtype", "Image"); + pdfDict.insertInt("Width", size.width()); + pdfDict.insertInt("Height", size.height()); + pdfDict.insertName("ColorSpace", colorSpace); + if (sMask) { + pdfDict.insertRef("SMask", sMask); + } + pdfDict.insertInt("BitsPerComponent", 8); + #ifdef SK_PDF_BASE85_BINARY + auto filters = SkPDFMakeArray(); + filters->appendName("ASCII85Decode"); + switch (format) { + case SkPDFStreamFormat::DCT: filters->appendName("DCTDecode"); break; + case SkPDFStreamFormat::Flate: filters->appendName("FlateDecode"); break; + case SkPDFStreamFormat::Uncompressed: break; + } + pdfDict.insertObject("Filter", std::move(filters)); + #else + switch (format) { + case SkPDFStreamFormat::DCT: pdfDict.insertName("Filter", "DCTDecode"); break; + case SkPDFStreamFormat::Flate: pdfDict.insertName("Filter", "FlateDecode"); break; + case SkPDFStreamFormat::Uncompressed: break; + } + #endif + if (format == SkPDFStreamFormat::DCT) { + pdfDict.insertInt("ColorTransform", 0); + } + pdfDict.insertInt("Length", length); + doc->emitStream(pdfDict, std::move(writeStream), ref); +} + +static void do_deflated_alpha(const SkPixmap& pm, SkPDFDocument* doc, SkPDFIndirectReference ref) { + SkPDF::Metadata::CompressionLevel compressionLevel = doc->metadata().fCompressionLevel; + SkPDFStreamFormat format = compressionLevel == SkPDF::Metadata::CompressionLevel::None + ? SkPDFStreamFormat::Uncompressed + : SkPDFStreamFormat::Flate; + SkDynamicMemoryWStream buffer; + SkWStream* stream = &buffer; + std::optional deflateWStream; + if (format == SkPDFStreamFormat::Flate) { + deflateWStream.emplace(&buffer, SkToInt(compressionLevel)); + stream = &*deflateWStream; + } + if (kAlpha_8_SkColorType == pm.colorType()) { + SkASSERT(pm.rowBytes() == (size_t)pm.width()); + stream->write(pm.addr8(), pm.width() * pm.height()); + } else { + SkASSERT(pm.alphaType() == kUnpremul_SkAlphaType); + SkASSERT(pm.colorType() == kBGRA_8888_SkColorType); + SkASSERT(pm.rowBytes() == (size_t)pm.width() * 4); + const uint32_t* ptr = pm.addr32(); + const uint32_t* stop = ptr + pm.height() * pm.width(); + + uint8_t byteBuffer[4092]; + uint8_t* bufferStop = byteBuffer + std::size(byteBuffer); + uint8_t* dst = byteBuffer; + while (ptr != stop) { + *dst++ = 0xFF & ((*ptr++) >> SK_BGRA_A32_SHIFT); + if (dst == bufferStop) { + stream->write(byteBuffer, sizeof(byteBuffer)); + dst = byteBuffer; + } + } + stream->write(byteBuffer, dst - byteBuffer); + } + if (deflateWStream) { + deflateWStream->finalize(); + } + + #ifdef SK_PDF_BASE85_BINARY + SkPDFUtils::Base85Encode(buffer.detachAsStream(), &buffer); + #endif + int length = SkToInt(buffer.bytesWritten()); + emit_image_stream(doc, ref, [&buffer](SkWStream* stream) { buffer.writeToAndReset(stream); }, + pm.info().dimensions(), "DeviceGray", SkPDFIndirectReference(), + length, format); +} + +static void do_deflated_image(const SkPixmap& pm, + SkPDFDocument* doc, + bool isOpaque, + SkPDFIndirectReference ref) { + SkPDFIndirectReference sMask; + if (!isOpaque) { + sMask = doc->reserveRef(); + } + SkPDF::Metadata::CompressionLevel compressionLevel = doc->metadata().fCompressionLevel; + SkPDFStreamFormat format = compressionLevel == SkPDF::Metadata::CompressionLevel::None + ? SkPDFStreamFormat::Uncompressed + : SkPDFStreamFormat::Flate; + SkDynamicMemoryWStream buffer; + SkWStream* stream = &buffer; + std::optional deflateWStream; + if (format == SkPDFStreamFormat::Flate) { + deflateWStream.emplace(&buffer, SkToInt(compressionLevel)); + stream = &*deflateWStream; + } + const char* colorSpace = "DeviceGray"; + switch (pm.colorType()) { + case kAlpha_8_SkColorType: + fill_stream(stream, '\x00', pm.width() * pm.height()); + break; + case kGray_8_SkColorType: + SkASSERT(sMask.fValue = -1); + SkASSERT(pm.rowBytes() == (size_t)pm.width()); + stream->write(pm.addr8(), pm.width() * pm.height()); + break; + default: + colorSpace = "DeviceRGB"; + SkASSERT(pm.alphaType() == kUnpremul_SkAlphaType); + SkASSERT(pm.colorType() == kBGRA_8888_SkColorType); + SkASSERT(pm.rowBytes() == (size_t)pm.width() * 4); + uint8_t byteBuffer[3072]; + static_assert(std::size(byteBuffer) % 3 == 0, ""); + uint8_t* bufferStop = byteBuffer + std::size(byteBuffer); + uint8_t* dst = byteBuffer; + for (int y = 0; y < pm.height(); ++y) { + const SkColor* src = pm.addr32(0, y); + for (int x = 0; x < pm.width(); ++x) { + SkColor color = *src++; + if (SkColorGetA(color) == SK_AlphaTRANSPARENT) { + color = get_neighbor_avg_color(pm, x, y); + } + *dst++ = SkColorGetR(color); + *dst++ = SkColorGetG(color); + *dst++ = SkColorGetB(color); + if (dst == bufferStop) { + stream->write(byteBuffer, sizeof(byteBuffer)); + dst = byteBuffer; + } + } + } + stream->write(byteBuffer, dst - byteBuffer); + } + if (deflateWStream) { + deflateWStream->finalize(); + } + #ifdef SK_PDF_BASE85_BINARY + SkPDFUtils::Base85Encode(buffer.detachAsStream(), &buffer); + #endif + int length = SkToInt(buffer.bytesWritten()); + emit_image_stream(doc, ref, [&buffer](SkWStream* stream) { buffer.writeToAndReset(stream); }, + pm.info().dimensions(), colorSpace, sMask, length, format); + if (!isOpaque) { + do_deflated_alpha(pm, doc, sMask); + } +} + +static bool do_jpeg(sk_sp data, SkPDFDocument* doc, SkISize size, + SkPDFIndirectReference ref) { + SkISize jpegSize; + SkEncodedInfo::Color jpegColorType; + SkEncodedOrigin exifOrientation; + if (!SkGetJpegInfo(data->data(), data->size(), &jpegSize, + &jpegColorType, &exifOrientation)) { + return false; + } + bool yuv = jpegColorType == SkEncodedInfo::kYUV_Color; + bool goodColorType = yuv || jpegColorType == SkEncodedInfo::kGray_Color; + if (jpegSize != size // Safety check. + || !goodColorType + || kTopLeft_SkEncodedOrigin != exifOrientation) { + return false; + } + #ifdef SK_PDF_BASE85_BINARY + SkDynamicMemoryWStream buffer; + SkPDFUtils::Base85Encode(SkMemoryStream::MakeDirect(data->data(), data->size()), &buffer); + data = buffer.detachAsData(); + #endif + + emit_image_stream(doc, ref, + [&data](SkWStream* dst) { dst->write(data->data(), data->size()); }, + jpegSize, yuv ? "DeviceRGB" : "DeviceGray", + SkPDFIndirectReference(), SkToInt(data->size()), SkPDFStreamFormat::DCT); + return true; +} + +static SkBitmap to_pixels(const SkImage* image) { + SkBitmap bm; + int w = image->width(), + h = image->height(); + switch (image->colorType()) { + case kAlpha_8_SkColorType: + bm.allocPixels(SkImageInfo::MakeA8(w, h)); + break; + case kGray_8_SkColorType: + bm.allocPixels(SkImageInfo::Make(w, h, kGray_8_SkColorType, kOpaque_SkAlphaType)); + break; + default: { + // TODO: makeColorSpace(sRGB) or actually tag the images + SkAlphaType at = bm.isOpaque() ? kOpaque_SkAlphaType : kUnpremul_SkAlphaType; + bm.allocPixels(SkImageInfo::Make(w, h, kBGRA_8888_SkColorType, at)); + } + } + // TODO: support GPU images in PDFs + if (!image->readPixels(nullptr, bm.pixmap(), 0, 0)) { + bm.eraseColor(SkColorSetARGB(0xFF, 0, 0, 0)); + } + return bm; +} + +void serialize_image(const SkImage* img, + int encodingQuality, + SkPDFDocument* doc, + SkPDFIndirectReference ref) { + SkASSERT(img); + SkASSERT(doc); + SkASSERT(encodingQuality >= 0); + SkISize dimensions = img->dimensions(); + if (sk_sp data = img->refEncodedData()) { + if (do_jpeg(std::move(data), doc, dimensions, ref)) { + return; + } + } + SkBitmap bm = to_pixels(img); + const SkPixmap& pm = bm.pixmap(); + bool isOpaque = pm.isOpaque() || pm.computeIsOpaque(); + if (encodingQuality <= 100 && isOpaque) { + if (sk_sp data = img->encodeToData(SkEncodedImageFormat::kJPEG, encodingQuality)) { + if (do_jpeg(std::move(data), doc, dimensions, ref)) { + return; + } + } + } + do_deflated_image(pm, doc, isOpaque, ref); +} + +SkPDFIndirectReference SkPDFSerializeImage(const SkImage* img, + SkPDFDocument* doc, + int encodingQuality) { + SkASSERT(img); + SkASSERT(doc); + SkPDFIndirectReference ref = doc->reserveRef(); + if (SkExecutor* executor = doc->executor()) { + SkRef(img); + doc->incrementJobCount(); + executor->add([img, encodingQuality, doc, ref]() { + serialize_image(img, encodingQuality, doc, ref); + SkSafeUnref(img); + doc->signalJobComplete(); + }); + return ref; + } + serialize_image(img, encodingQuality, doc, ref); + return ref; +} diff --git a/gfx/skia/skia/src/pdf/SkPDFBitmap.h b/gfx/skia/skia/src/pdf/SkPDFBitmap.h new file mode 100644 index 0000000000..bc2c57bd3b --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFBitmap.h @@ -0,0 +1,22 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPDFBitmap_DEFINED +#define SkPDFBitmap_DEFINED + +class SkImage; +class SkPDFDocument; +struct SkPDFIndirectReference; + +/** + * Serialize a SkImage as an Image Xobject. + * quality > 100 means lossless + */ +SkPDFIndirectReference SkPDFSerializeImage(const SkImage* img, + SkPDFDocument* doc, + int encodingQuality = 101); + +#endif // SkPDFBitmap_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFDevice.cpp b/gfx/skia/skia/src/pdf/SkPDFDevice.cpp new file mode 100644 index 0000000000..50c828ff39 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFDevice.cpp @@ -0,0 +1,1761 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFDevice.h" + +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkPath.h" +#include "include/core/SkPathEffect.h" +#include "include/core/SkPathUtils.h" +#include "include/core/SkRRect.h" +#include "include/core/SkString.h" +#include "include/core/SkSurface.h" +#include "include/core/SkTextBlob.h" +#include "include/docs/SkPDFDocument.h" +#include "include/encode/SkJpegEncoder.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkScopeExit.h" +#include "src/base/SkUTF.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkAnnotationKeys.h" +#include "src/core/SkBitmapDevice.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkDraw.h" +#include "src/core/SkImageFilterCache.h" +#include "src/core/SkImageFilter_Base.h" +#include "src/core/SkMaskFilterBase.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeSpec.h" +#include "src/core/SkTextFormatParams.h" +#include "src/core/SkXfermodeInterpretation.h" +#include "src/pdf/SkBitmapKey.h" +#include "src/pdf/SkClusterator.h" +#include "src/pdf/SkPDFBitmap.h" +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFFont.h" +#include "src/pdf/SkPDFFormXObject.h" +#include "src/pdf/SkPDFGraphicState.h" +#include "src/pdf/SkPDFResourceDict.h" +#include "src/pdf/SkPDFShader.h" +#include "src/pdf/SkPDFTypes.h" +#include "src/pdf/SkPDFUtils.h" +#include "src/text/GlyphRun.h" +#include "src/utils/SkClipStackUtils.h" + +#include + +#ifndef SK_PDF_MASK_QUALITY + // If MASK_QUALITY is in [0,100], will be used for JpegEncoder. + // Otherwise, just encode masks losslessly. + #define SK_PDF_MASK_QUALITY 50 + // Since these masks are used for blurry shadows, we shouldn't need + // high quality. Raise this value if your shadows have visible JPEG + // artifacts. + // If SkJpegEncoder::Encode fails, we will fall back to the lossless + // encoding. +#endif + +namespace { + +// If nodeId is not zero, outputs the tags to begin a marked-content sequence +// for the given node ID, and then closes those tags when this object goes +// out of scope. +class ScopedOutputMarkedContentTags { +public: + ScopedOutputMarkedContentTags(int nodeId, SkPDFDocument* document, SkDynamicMemoryWStream* out) + : fOut(out) + , fMarkId(-1) { + if (nodeId) { + fMarkId = document->createMarkIdForNodeId(nodeId); + } + + if (fMarkId != -1) { + fOut->writeText("/P <writeDecAsText(fMarkId); + fOut->writeText(" >>BDC\n"); + } + } + + ~ScopedOutputMarkedContentTags() { + if (fMarkId != -1) { + fOut->writeText("EMC\n"); + } + } + +private: + SkDynamicMemoryWStream* fOut; + int fMarkId; +}; + +} // namespace + +// Utility functions + +// This function destroys the mask and either frees or takes the pixels. +sk_sp mask_to_greyscale_image(SkMask* mask) { + sk_sp img; + SkPixmap pm(SkImageInfo::Make(mask->fBounds.width(), mask->fBounds.height(), + kGray_8_SkColorType, kOpaque_SkAlphaType), + mask->fImage, mask->fRowBytes); + const int imgQuality = SK_PDF_MASK_QUALITY; + if (imgQuality <= 100 && imgQuality >= 0) { + SkDynamicMemoryWStream buffer; + SkJpegEncoder::Options jpegOptions; + jpegOptions.fQuality = imgQuality; + if (SkJpegEncoder::Encode(&buffer, pm, jpegOptions)) { + img = SkImage::MakeFromEncoded(buffer.detachAsData()); + SkASSERT(img); + if (img) { + SkMask::FreeImage(mask->fImage); + } + } + } + if (!img) { + img = SkImage::MakeFromRaster(pm, [](const void* p, void*) { SkMask::FreeImage((void*)p); }, + nullptr); + } + *mask = SkMask(); // destructive; + return img; +} + +sk_sp alpha_image_to_greyscale_image(const SkImage* mask) { + int w = mask->width(), h = mask->height(); + SkBitmap greyBitmap; + greyBitmap.allocPixels(SkImageInfo::Make(w, h, kGray_8_SkColorType, kOpaque_SkAlphaType)); + // TODO: support gpu images in pdf + if (!mask->readPixels(nullptr, SkImageInfo::MakeA8(w, h), + greyBitmap.getPixels(), greyBitmap.rowBytes(), 0, 0)) { + return nullptr; + } + greyBitmap.setImmutable(); + return greyBitmap.asImage(); +} + +static int add_resource(SkTHashSet& resources, SkPDFIndirectReference ref) { + resources.add(ref); + return ref.fValue; +} + +static void draw_points(SkCanvas::PointMode mode, + size_t count, + const SkPoint* points, + const SkPaint& paint, + const SkIRect& bounds, + SkBaseDevice* device) { + SkRasterClip rc(bounds); + SkDraw draw; + draw.fDst = SkPixmap(SkImageInfo::MakeUnknown(bounds.right(), bounds.bottom()), nullptr, 0); + draw.fMatrixProvider = device; + draw.fRC = &rc; + draw.drawPoints(mode, count, points, paint, device); +} + +static void transform_shader(SkPaint* paint, const SkMatrix& ctm) { + SkASSERT(!ctm.isIdentity()); +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) + // A shader's matrix is: CTM x LocalMatrix x WrappingLocalMatrix. We want to + // switch to device space, where CTM = I, while keeping the original behavior. + // + // I * LocalMatrix * NewWrappingMatrix = CTM * LocalMatrix + // LocalMatrix * NewWrappingMatrix = CTM * LocalMatrix + // InvLocalMatrix * LocalMatrix * NewWrappingMatrix = InvLocalMatrix * CTM * LocalMatrix + // NewWrappingMatrix = InvLocalMatrix * CTM * LocalMatrix + // + SkMatrix lm = SkPDFUtils::GetShaderLocalMatrix(paint->getShader()); + SkMatrix lmInv; + if (lm.invert(&lmInv)) { + SkMatrix m = SkMatrix::Concat(SkMatrix::Concat(lmInv, ctm), lm); + paint->setShader(paint->getShader()->makeWithLocalMatrix(m)); + } + return; +#endif + paint->setShader(paint->getShader()->makeWithLocalMatrix(ctm)); +} + + +static SkTCopyOnFirstWrite clean_paint(const SkPaint& srcPaint) { + SkTCopyOnFirstWrite paint(srcPaint); + // If the paint will definitely draw opaquely, replace kSrc with + // kSrcOver. http://crbug.com/473572 + if (!paint->isSrcOver() && + kSrcOver_SkXfermodeInterpretation == SkInterpretXfermode(*paint, false)) + { + paint.writable()->setBlendMode(SkBlendMode::kSrcOver); + } + if (paint->getColorFilter()) { + // We assume here that PDFs all draw in sRGB. + SkPaintPriv::RemoveColorFilter(paint.writable(), sk_srgb_singleton()); + } + SkASSERT(!paint->getColorFilter()); + return paint; +} + +static void set_style(SkTCopyOnFirstWrite* paint, SkPaint::Style style) { + if (paint->get()->getStyle() != style) { + paint->writable()->setStyle(style); + } +} + +/* Calculate an inverted path's equivalent non-inverted path, given the + * canvas bounds. + * outPath may alias with invPath (since this is supported by PathOps). + */ +static bool calculate_inverse_path(const SkRect& bounds, const SkPath& invPath, + SkPath* outPath) { + SkASSERT(invPath.isInverseFillType()); + return Op(SkPath::Rect(bounds), invPath, kIntersect_SkPathOp, outPath); +} + +SkBaseDevice* SkPDFDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint* layerPaint) { + // PDF does not support image filters, so render them on CPU. + // Note that this rendering is done at "screen" resolution (100dpi), not + // printer resolution. + + // TODO: It may be possible to express some filters natively using PDF + // to improve quality and file size (https://bug.skia.org/3043) + if (layerPaint && (layerPaint->getImageFilter() || layerPaint->getColorFilter())) { + // need to return a raster device, which we will detect in drawDevice() + return SkBitmapDevice::Create(cinfo.fInfo, SkSurfaceProps(0, kUnknown_SkPixelGeometry)); + } + return new SkPDFDevice(cinfo.fInfo.dimensions(), fDocument); +} + +// A helper class to automatically finish a ContentEntry at the end of a +// drawing method and maintain the state needed between set up and finish. +class ScopedContentEntry { +public: + ScopedContentEntry(SkPDFDevice* device, + const SkClipStack* clipStack, + const SkMatrix& matrix, + const SkPaint& paint, + SkScalar textScale = 0) + : fDevice(device) + , fBlendMode(SkBlendMode::kSrcOver) + , fClipStack(clipStack) + { + if (matrix.hasPerspective()) { + NOT_IMPLEMENTED(!matrix.hasPerspective(), false); + return; + } + fBlendMode = paint.getBlendMode_or(SkBlendMode::kSrcOver); + fContentStream = + fDevice->setUpContentEntry(clipStack, matrix, paint, textScale, &fDstFormXObject); + } + ScopedContentEntry(SkPDFDevice* dev, const SkPaint& paint, SkScalar textScale = 0) + : ScopedContentEntry(dev, &dev->cs(), dev->localToDevice(), paint, textScale) {} + + ~ScopedContentEntry() { + if (fContentStream) { + SkPath* shape = &fShape; + if (shape->isEmpty()) { + shape = nullptr; + } + fDevice->finishContentEntry(fClipStack, fBlendMode, fDstFormXObject, shape); + } + } + + explicit operator bool() const { return fContentStream != nullptr; } + SkDynamicMemoryWStream* stream() { return fContentStream; } + + /* Returns true when we explicitly need the shape of the drawing. */ + bool needShape() { + switch (fBlendMode) { + case SkBlendMode::kClear: + case SkBlendMode::kSrc: + case SkBlendMode::kSrcIn: + case SkBlendMode::kSrcOut: + case SkBlendMode::kDstIn: + case SkBlendMode::kDstOut: + case SkBlendMode::kSrcATop: + case SkBlendMode::kDstATop: + case SkBlendMode::kModulate: + return true; + default: + return false; + } + } + + /* Returns true unless we only need the shape of the drawing. */ + bool needSource() { + if (fBlendMode == SkBlendMode::kClear) { + return false; + } + return true; + } + + /* If the shape is different than the alpha component of the content, then + * setShape should be called with the shape. In particular, images and + * devices have rectangular shape. + */ + void setShape(const SkPath& shape) { + fShape = shape; + } + +private: + SkPDFDevice* fDevice = nullptr; + SkDynamicMemoryWStream* fContentStream = nullptr; + SkBlendMode fBlendMode; + SkPDFIndirectReference fDstFormXObject; + SkPath fShape; + const SkClipStack* fClipStack; +}; + +//////////////////////////////////////////////////////////////////////////////// + +SkPDFDevice::SkPDFDevice(SkISize pageSize, SkPDFDocument* doc, const SkMatrix& transform) + : INHERITED(SkImageInfo::MakeUnknown(pageSize.width(), pageSize.height()), + SkSurfaceProps(0, kUnknown_SkPixelGeometry)) + , fInitialTransform(transform) + , fNodeId(0) + , fDocument(doc) +{ + SkASSERT(!pageSize.isEmpty()); +} + +SkPDFDevice::~SkPDFDevice() = default; + +void SkPDFDevice::reset() { + fGraphicStateResources.reset(); + fXObjectResources.reset(); + fShaderResources.reset(); + fFontResources.reset(); + fContent.reset(); + fActiveStackState = SkPDFGraphicStackState(); +} + +void SkPDFDevice::drawAnnotation(const SkRect& rect, const char key[], SkData* value) { + if (!value) { + return; + } + // Annotations are specified in absolute coordinates, so the page xform maps from device space + // to the global space, and applies the document transform. + SkMatrix pageXform = this->deviceToGlobal().asM33(); + pageXform.postConcat(fDocument->currentPageTransform()); + if (rect.isEmpty()) { + if (!strcmp(key, SkPDFGetNodeIdKey())) { + int nodeID; + if (value->size() != sizeof(nodeID)) { return; } + memcpy(&nodeID, value->data(), sizeof(nodeID)); + fNodeId = nodeID; + return; + } + if (!strcmp(SkAnnotationKeys::Define_Named_Dest_Key(), key)) { + SkPoint p = this->localToDevice().mapXY(rect.x(), rect.y()); + pageXform.mapPoints(&p, 1); + auto pg = fDocument->currentPage(); + fDocument->fNamedDestinations.push_back(SkPDFNamedDestination{sk_ref_sp(value), p, pg}); + } + return; + } + // Convert to path to handle non-90-degree rotations. + SkPath path = SkPath::Rect(rect).makeTransform(this->localToDevice()); + SkPath clip; + SkClipStack_AsPath(this->cs(), &clip); + Op(clip, path, kIntersect_SkPathOp, &path); + // PDF wants a rectangle only. + SkRect transformedRect = pageXform.mapRect(path.getBounds()); + if (transformedRect.isEmpty()) { + return; + } + + SkPDFLink::Type linkType = SkPDFLink::Type::kNone; + if (!strcmp(SkAnnotationKeys::URL_Key(), key)) { + linkType = SkPDFLink::Type::kUrl; + } else if (!strcmp(SkAnnotationKeys::Link_Named_Dest_Key(), key)) { + linkType = SkPDFLink::Type::kNamedDestination; + } + + if (linkType != SkPDFLink::Type::kNone) { + std::unique_ptr link = std::make_unique( + linkType, value, transformedRect, fNodeId); + fDocument->fCurrentPageLinks.push_back(std::move(link)); + } +} + +void SkPDFDevice::drawPaint(const SkPaint& srcPaint) { + SkMatrix inverse; + if (!this->localToDevice().invert(&inverse)) { + return; + } + SkRect bbox = this->cs().bounds(this->bounds()); + inverse.mapRect(&bbox); + bbox.roundOut(&bbox); + if (this->hasEmptyClip()) { + return; + } + SkPaint newPaint = srcPaint; + newPaint.setStyle(SkPaint::kFill_Style); + this->drawRect(bbox, newPaint); +} + +void SkPDFDevice::drawPoints(SkCanvas::PointMode mode, + size_t count, + const SkPoint* points, + const SkPaint& srcPaint) { + if (this->hasEmptyClip()) { + return; + } + if (count == 0) { + return; + } + SkTCopyOnFirstWrite paint(clean_paint(srcPaint)); + + + + if (SkCanvas::kPoints_PointMode != mode) { + set_style(&paint, SkPaint::kStroke_Style); + } + + // SkDraw::drawPoints converts to multiple calls to fDevice->drawPath. + // We only use this when there's a path effect or perspective because of the overhead + // of multiple calls to setUpContentEntry it causes. + if (paint->getPathEffect() || this->localToDevice().hasPerspective()) { + draw_points(mode, count, points, *paint, this->devClipBounds(), this); + return; + } + + + if (mode == SkCanvas::kPoints_PointMode && paint->getStrokeCap() != SkPaint::kRound_Cap) { + if (paint->getStrokeWidth()) { + // PDF won't draw a single point with square/butt caps because the + // orientation is ambiguous. Draw a rectangle instead. + set_style(&paint, SkPaint::kFill_Style); + SkScalar strokeWidth = paint->getStrokeWidth(); + SkScalar halfStroke = SkScalarHalf(strokeWidth); + for (size_t i = 0; i < count; i++) { + SkRect r = SkRect::MakeXYWH(points[i].fX, points[i].fY, 0, 0); + r.inset(-halfStroke, -halfStroke); + this->drawRect(r, *paint); + } + return; + } else { + if (paint->getStrokeCap() != SkPaint::kRound_Cap) { + paint.writable()->setStrokeCap(SkPaint::kRound_Cap); + } + } + } + + ScopedContentEntry content(this, *paint); + if (!content) { + return; + } + SkDynamicMemoryWStream* contentStream = content.stream(); + switch (mode) { + case SkCanvas::kPolygon_PointMode: + SkPDFUtils::MoveTo(points[0].fX, points[0].fY, contentStream); + for (size_t i = 1; i < count; i++) { + SkPDFUtils::AppendLine(points[i].fX, points[i].fY, contentStream); + } + SkPDFUtils::StrokePath(contentStream); + break; + case SkCanvas::kLines_PointMode: + for (size_t i = 0; i < count/2; i++) { + SkPDFUtils::MoveTo(points[i * 2].fX, points[i * 2].fY, contentStream); + SkPDFUtils::AppendLine(points[i * 2 + 1].fX, points[i * 2 + 1].fY, contentStream); + SkPDFUtils::StrokePath(contentStream); + } + break; + case SkCanvas::kPoints_PointMode: + SkASSERT(paint->getStrokeCap() == SkPaint::kRound_Cap); + for (size_t i = 0; i < count; i++) { + SkPDFUtils::MoveTo(points[i].fX, points[i].fY, contentStream); + SkPDFUtils::ClosePath(contentStream); + SkPDFUtils::StrokePath(contentStream); + } + break; + default: + SkASSERT(false); + } +} + +void SkPDFDevice::drawRect(const SkRect& rect, const SkPaint& paint) { + SkRect r = rect; + r.sort(); + this->internalDrawPath(this->cs(), this->localToDevice(), SkPath::Rect(r), paint, true); +} + +void SkPDFDevice::drawRRect(const SkRRect& rrect, const SkPaint& paint) { + this->internalDrawPath(this->cs(), this->localToDevice(), SkPath::RRect(rrect), paint, true); +} + +void SkPDFDevice::drawOval(const SkRect& oval, const SkPaint& paint) { + this->internalDrawPath(this->cs(), this->localToDevice(), SkPath::Oval(oval), paint, true); +} + +void SkPDFDevice::drawPath(const SkPath& path, const SkPaint& paint, bool pathIsMutable) { + this->internalDrawPath(this->cs(), this->localToDevice(), path, paint, pathIsMutable); +} + +void SkPDFDevice::internalDrawPathWithFilter(const SkClipStack& clipStack, + const SkMatrix& ctm, + const SkPath& origPath, + const SkPaint& origPaint) { + SkASSERT(origPaint.getMaskFilter()); + SkPath path(origPath); + SkTCopyOnFirstWrite paint(origPaint); + + SkStrokeRec::InitStyle initStyle = skpathutils::FillPathWithPaint(path, *paint, &path) + ? SkStrokeRec::kFill_InitStyle + : SkStrokeRec::kHairline_InitStyle; + path.transform(ctm, &path); + + SkIRect bounds = clipStack.bounds(this->bounds()).roundOut(); + SkMask sourceMask; + if (!SkDraw::DrawToMask(path, bounds, paint->getMaskFilter(), &SkMatrix::I(), + &sourceMask, SkMask::kComputeBoundsAndRenderImage_CreateMode, + initStyle)) { + return; + } + SkAutoMaskFreeImage srcAutoMaskFreeImage(sourceMask.fImage); + SkMask dstMask; + SkIPoint margin; + if (!as_MFB(paint->getMaskFilter())->filterMask(&dstMask, sourceMask, ctm, &margin)) { + return; + } + SkIRect dstMaskBounds = dstMask.fBounds; + sk_sp mask = mask_to_greyscale_image(&dstMask); + // PDF doesn't seem to allow masking vector graphics with an Image XObject. + // Must mask with a Form XObject. + sk_sp maskDevice = this->makeCongruentDevice(); + { + SkCanvas canvas(maskDevice); + canvas.drawImage(mask, dstMaskBounds.x(), dstMaskBounds.y()); + } + if (!ctm.isIdentity() && paint->getShader()) { + transform_shader(paint.writable(), ctm); // Since we are using identity matrix. + } + ScopedContentEntry content(this, &clipStack, SkMatrix::I(), *paint); + if (!content) { + return; + } + this->setGraphicState(SkPDFGraphicState::GetSMaskGraphicState( + maskDevice->makeFormXObjectFromDevice(dstMaskBounds, true), false, + SkPDFGraphicState::kLuminosity_SMaskMode, fDocument), content.stream()); + SkPDFUtils::AppendRectangle(SkRect::Make(dstMaskBounds), content.stream()); + SkPDFUtils::PaintPath(SkPaint::kFill_Style, path.getFillType(), content.stream()); + this->clearMaskOnGraphicState(content.stream()); +} + +void SkPDFDevice::setGraphicState(SkPDFIndirectReference gs, SkDynamicMemoryWStream* content) { + SkPDFUtils::ApplyGraphicState(add_resource(fGraphicStateResources, gs), content); +} + +void SkPDFDevice::clearMaskOnGraphicState(SkDynamicMemoryWStream* contentStream) { + // The no-softmask graphic state is used to "turn off" the mask for later draw calls. + SkPDFIndirectReference& noSMaskGS = fDocument->fNoSmaskGraphicState; + if (!noSMaskGS) { + SkPDFDict tmp("ExtGState"); + tmp.insertName("SMask", "None"); + noSMaskGS = fDocument->emit(tmp); + } + this->setGraphicState(noSMaskGS, contentStream); +} + +void SkPDFDevice::internalDrawPath(const SkClipStack& clipStack, + const SkMatrix& ctm, + const SkPath& origPath, + const SkPaint& srcPaint, + bool pathIsMutable) { + if (clipStack.isEmpty(this->bounds())) { + return; + } + SkTCopyOnFirstWrite paint(clean_paint(srcPaint)); + SkPath modifiedPath; + SkPath* pathPtr = const_cast(&origPath); + + if (paint->getMaskFilter()) { + this->internalDrawPathWithFilter(clipStack, ctm, origPath, *paint); + return; + } + + SkMatrix matrix = ctm; + + if (paint->getPathEffect()) { + if (clipStack.isEmpty(this->bounds())) { + return; + } + if (!pathIsMutable) { + modifiedPath = origPath; + pathPtr = &modifiedPath; + pathIsMutable = true; + } + if (skpathutils::FillPathWithPaint(*pathPtr, *paint, pathPtr)) { + set_style(&paint, SkPaint::kFill_Style); + } else { + set_style(&paint, SkPaint::kStroke_Style); + if (paint->getStrokeWidth() != 0) { + paint.writable()->setStrokeWidth(0); + } + } + paint.writable()->setPathEffect(nullptr); + } + + if (this->handleInversePath(*pathPtr, *paint, pathIsMutable)) { + return; + } + if (matrix.getType() & SkMatrix::kPerspective_Mask) { + if (!pathIsMutable) { + modifiedPath = origPath; + pathPtr = &modifiedPath; + pathIsMutable = true; + } + pathPtr->transform(matrix); + if (paint->getShader()) { + transform_shader(paint.writable(), matrix); + } + matrix = SkMatrix::I(); + } + + ScopedContentEntry content(this, &clipStack, matrix, *paint); + if (!content) { + return; + } + constexpr SkScalar kToleranceScale = 0.0625f; // smaller = better conics (circles). + SkScalar matrixScale = matrix.mapRadius(1.0f); + SkScalar tolerance = matrixScale > 0.0f ? kToleranceScale / matrixScale : kToleranceScale; + bool consumeDegeratePathSegments = + paint->getStyle() == SkPaint::kFill_Style || + (paint->getStrokeCap() != SkPaint::kRound_Cap && + paint->getStrokeCap() != SkPaint::kSquare_Cap); + SkPDFUtils::EmitPath(*pathPtr, paint->getStyle(), consumeDegeratePathSegments, content.stream(), + tolerance); + SkPDFUtils::PaintPath(paint->getStyle(), pathPtr->getFillType(), content.stream()); +} + +//////////////////////////////////////////////////////////////////////////////// + +void SkPDFDevice::drawImageRect(const SkImage* image, + const SkRect* src, + const SkRect& dst, + const SkSamplingOptions& sampling, + const SkPaint& paint, + SkCanvas::SrcRectConstraint) { + SkASSERT(image); + this->internalDrawImageRect(SkKeyedImage(sk_ref_sp(const_cast(image))), + src, dst, sampling, paint, this->localToDevice()); +} + +void SkPDFDevice::drawSprite(const SkBitmap& bm, int x, int y, const SkPaint& paint) { + SkASSERT(!bm.drawsNothing()); + auto r = SkRect::MakeXYWH(x, y, bm.width(), bm.height()); + this->internalDrawImageRect(SkKeyedImage(bm), nullptr, r, SkSamplingOptions(), paint, + SkMatrix::I()); +} + +//////////////////////////////////////////////////////////////////////////////// + +namespace { +class GlyphPositioner { +public: + GlyphPositioner(SkDynamicMemoryWStream* content, + SkScalar textSkewX, + SkPoint origin) + : fContent(content) + , fCurrentMatrixOrigin(origin) + , fTextSkewX(textSkewX) { + } + ~GlyphPositioner() { this->flush(); } + void flush() { + if (fInText) { + fContent->writeText("> Tj\n"); + fInText = false; + } + } + void setFont(SkPDFFont* pdfFont) { + this->flush(); + fPDFFont = pdfFont; + // Reader 2020.013.20064 incorrectly advances some Type3 fonts https://crbug.com/1226960 + bool convertedToType3 = fPDFFont->getType() == SkAdvancedTypefaceMetrics::kOther_Font; + bool thousandEM = fPDFFont->typeface()->getUnitsPerEm() == 1000; + fViewersAgreeOnAdvancesInFont = thousandEM || !convertedToType3; + } + void writeGlyph(uint16_t glyph, SkScalar advanceWidth, SkPoint xy) { + SkASSERT(fPDFFont); + if (!fInitialized) { + // Flip the text about the x-axis to account for origin swap and include + // the passed parameters. + fContent->writeText("1 0 "); + SkPDFUtils::AppendScalar(-fTextSkewX, fContent); + fContent->writeText(" -1 "); + SkPDFUtils::AppendScalar(fCurrentMatrixOrigin.x(), fContent); + fContent->writeText(" "); + SkPDFUtils::AppendScalar(fCurrentMatrixOrigin.y(), fContent); + fContent->writeText(" Tm\n"); + fCurrentMatrixOrigin.set(0.0f, 0.0f); + fInitialized = true; + } + SkPoint position = xy - fCurrentMatrixOrigin; + if (!fViewersAgreeOnXAdvance || position != SkPoint{fXAdvance, 0}) { + this->flush(); + SkPDFUtils::AppendScalar(position.x() - position.y() * fTextSkewX, fContent); + fContent->writeText(" "); + SkPDFUtils::AppendScalar(-position.y(), fContent); + fContent->writeText(" Td "); + fCurrentMatrixOrigin = xy; + fXAdvance = 0; + fViewersAgreeOnXAdvance = true; + } + fXAdvance += advanceWidth; + if (!fViewersAgreeOnAdvancesInFont) { + fViewersAgreeOnXAdvance = false; + } + if (!fInText) { + fContent->writeText("<"); + fInText = true; + } + if (fPDFFont->multiByteGlyphs()) { + SkPDFUtils::WriteUInt16BE(fContent, glyph); + } else { + SkASSERT(0 == glyph >> 8); + SkPDFUtils::WriteUInt8(fContent, static_cast(glyph)); + } + } + +private: + SkDynamicMemoryWStream* fContent; + SkPDFFont* fPDFFont = nullptr; + SkPoint fCurrentMatrixOrigin; + SkScalar fXAdvance = 0.0f; + bool fViewersAgreeOnAdvancesInFont = true; + bool fViewersAgreeOnXAdvance = true; + SkScalar fTextSkewX; + bool fInText = false; + bool fInitialized = false; +}; +} // namespace + +static SkUnichar map_glyph(const std::vector& glyphToUnicode, SkGlyphID glyph) { + return glyph < glyphToUnicode.size() ? glyphToUnicode[SkToInt(glyph)] : -1; +} + +namespace { +struct PositionedGlyph { + SkPoint fPos; + SkGlyphID fGlyph; +}; +} // namespace + +static SkRect get_glyph_bounds_device_space(const SkGlyph* glyph, + SkScalar xScale, SkScalar yScale, + SkPoint xy, const SkMatrix& ctm) { + SkRect glyphBounds = SkMatrix::Scale(xScale, yScale).mapRect(glyph->rect()); + glyphBounds.offset(xy); + ctm.mapRect(&glyphBounds); // now in dev space. + return glyphBounds; +} + +static bool contains(const SkRect& r, SkPoint p) { + return r.left() <= p.x() && p.x() <= r.right() && + r.top() <= p.y() && p.y() <= r.bottom(); +} + +void SkPDFDevice::drawGlyphRunAsPath( + const sktext::GlyphRun& glyphRun, SkPoint offset, const SkPaint& runPaint) { + const SkFont& font = glyphRun.font(); + SkPath path; + + struct Rec { + SkPath* fPath; + SkPoint fOffset; + const SkPoint* fPos; + } rec = {&path, offset, glyphRun.positions().data()}; + + font.getPaths(glyphRun.glyphsIDs().data(), glyphRun.glyphsIDs().size(), + [](const SkPath* path, const SkMatrix& mx, void* ctx) { + Rec* rec = reinterpret_cast(ctx); + if (path) { + SkMatrix total = mx; + total.postTranslate(rec->fPos->fX + rec->fOffset.fX, + rec->fPos->fY + rec->fOffset.fY); + rec->fPath->addPath(*path, total); + } + rec->fPos += 1; // move to the next glyph's position + }, &rec); + this->internalDrawPath(this->cs(), this->localToDevice(), path, runPaint, true); + + SkFont transparentFont = glyphRun.font(); + transparentFont.setEmbolden(false); // Stop Recursion + sktext::GlyphRun tmpGlyphRun(glyphRun, transparentFont); + + SkPaint transparent; + transparent.setColor(SK_ColorTRANSPARENT); + + if (this->localToDevice().hasPerspective()) { + SkAutoDeviceTransformRestore adr(this, SkMatrix::I()); + this->internalDrawGlyphRun(tmpGlyphRun, offset, transparent); + } else { + this->internalDrawGlyphRun(tmpGlyphRun, offset, transparent); + } +} + +static bool needs_new_font(SkPDFFont* font, const SkGlyph* glyph, + SkAdvancedTypefaceMetrics::FontType fontType) { + if (!font || !font->hasGlyph(glyph->getGlyphID())) { + return true; + } + if (fontType == SkAdvancedTypefaceMetrics::kOther_Font) { + return false; + } + if (glyph->isEmpty()) { + return false; + } + + bool bitmapOnly = nullptr == glyph->path(); + bool convertedToType3 = (font->getType() == SkAdvancedTypefaceMetrics::kOther_Font); + return convertedToType3 != bitmapOnly; +} + +void SkPDFDevice::internalDrawGlyphRun( + const sktext::GlyphRun& glyphRun, SkPoint offset, const SkPaint& runPaint) { + + const SkGlyphID* glyphIDs = glyphRun.glyphsIDs().data(); + uint32_t glyphCount = SkToU32(glyphRun.glyphsIDs().size()); + const SkFont& glyphRunFont = glyphRun.font(); + + if (!glyphCount || !glyphIDs || glyphRunFont.getSize() <= 0 || this->hasEmptyClip()) { + return; + } + if (runPaint.getPathEffect() + || runPaint.getMaskFilter() + || glyphRunFont.isEmbolden() + || this->localToDevice().hasPerspective() + || SkPaint::kFill_Style != runPaint.getStyle()) { + // Stroked Text doesn't work well with Type3 fonts. + this->drawGlyphRunAsPath(glyphRun, offset, runPaint); + return; + } + SkTypeface* typeface = glyphRunFont.getTypefaceOrDefault(); + if (!typeface) { + SkDebugf("SkPDF: SkTypeface::MakeDefault() returned nullptr.\n"); + return; + } + + const SkAdvancedTypefaceMetrics* metrics = SkPDFFont::GetMetrics(typeface, fDocument); + if (!metrics) { + return; + } + SkAdvancedTypefaceMetrics::FontType fontType = SkPDFFont::FontType(*typeface, *metrics); + + const std::vector& glyphToUnicode = SkPDFFont::GetUnicodeMap(typeface, fDocument); + + SkClusterator clusterator(glyphRun); + + int emSize; + SkStrikeSpec strikeSpec = SkStrikeSpec::MakePDFVector(*typeface, &emSize); + + SkScalar textSize = glyphRunFont.getSize(); + SkScalar advanceScale = textSize * glyphRunFont.getScaleX() / emSize; + + // textScaleX and textScaleY are used to get a conservative bounding box for glyphs. + SkScalar textScaleY = textSize / emSize; + SkScalar textScaleX = advanceScale + glyphRunFont.getSkewX() * textScaleY; + + SkRect clipStackBounds = this->cs().bounds(this->bounds()); + + SkTCopyOnFirstWrite paint(clean_paint(runPaint)); + ScopedContentEntry content(this, *paint, glyphRunFont.getScaleX()); + if (!content) { + return; + } + SkDynamicMemoryWStream* out = content.stream(); + + out->writeText("BT\n"); + SK_AT_SCOPE_EXIT(out->writeText("ET\n")); + + ScopedOutputMarkedContentTags mark(fNodeId, fDocument, out); + + const int numGlyphs = typeface->countGlyphs(); + + if (clusterator.reversedChars()) { + out->writeText("/ReversedChars BMC\n"); + } + SK_AT_SCOPE_EXIT(if (clusterator.reversedChars()) { out->writeText("EMC\n"); } ); + GlyphPositioner glyphPositioner(out, glyphRunFont.getSkewX(), offset); + SkPDFFont* font = nullptr; + + SkBulkGlyphMetricsAndPaths paths{strikeSpec}; + auto glyphs = paths.glyphs(glyphRun.glyphsIDs()); + + while (SkClusterator::Cluster c = clusterator.next()) { + int index = c.fGlyphIndex; + int glyphLimit = index + c.fGlyphCount; + + bool actualText = false; + SK_AT_SCOPE_EXIT(if (actualText) { + glyphPositioner.flush(); + out->writeText("EMC\n"); + }); + if (c.fUtf8Text) { // real cluster + // Check if `/ActualText` needed. + const char* textPtr = c.fUtf8Text; + const char* textEnd = c.fUtf8Text + c.fTextByteLength; + SkUnichar unichar = SkUTF::NextUTF8(&textPtr, textEnd); + if (unichar < 0) { + return; + } + if (textPtr < textEnd || // >1 code points in cluster + c.fGlyphCount > 1 || // >1 glyphs in cluster + unichar != map_glyph(glyphToUnicode, glyphIDs[index])) // 1:1 but wrong mapping + { + glyphPositioner.flush(); + out->writeText("/Span<writeText(" >> BDC\n"); // begin marked-content sequence + // with an associated property list. + actualText = true; + } + } + for (; index < glyphLimit; ++index) { + SkGlyphID gid = glyphIDs[index]; + if (numGlyphs <= gid) { + continue; + } + SkPoint xy = glyphRun.positions()[index]; + // Do a glyph-by-glyph bounds-reject if positions are absolute. + SkRect glyphBounds = get_glyph_bounds_device_space( + glyphs[index], textScaleX, textScaleY, + xy + offset, this->localToDevice()); + if (glyphBounds.isEmpty()) { + if (!contains(clipStackBounds, {glyphBounds.x(), glyphBounds.y()})) { + continue; + } + } else { + if (!clipStackBounds.intersects(glyphBounds)) { + continue; // reject glyphs as out of bounds + } + } + if (needs_new_font(font, glyphs[index], fontType)) { + // Not yet specified font or need to switch font. + font = SkPDFFont::GetFontResource(fDocument, glyphs[index], typeface); + SkASSERT(font); // All preconditions for SkPDFFont::GetFontResource are met. + glyphPositioner.setFont(font); + SkPDFWriteResourceName(out, SkPDFResourceType::kFont, + add_resource(fFontResources, font->indirectReference())); + out->writeText(" "); + SkPDFUtils::AppendScalar(textSize, out); + out->writeText(" Tf\n"); + + } + font->noteGlyphUsage(gid); + SkGlyphID encodedGlyph = font->glyphToPDFFontEncoding(gid); + SkScalar advance = advanceScale * glyphs[index]->advanceX(); + glyphPositioner.writeGlyph(encodedGlyph, advance, xy); + } + } +} + +void SkPDFDevice::onDrawGlyphRunList(SkCanvas*, + const sktext::GlyphRunList& glyphRunList, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) { + SkASSERT(!glyphRunList.hasRSXForm()); + for (const sktext::GlyphRun& glyphRun : glyphRunList) { + this->internalDrawGlyphRun(glyphRun, glyphRunList.origin(), drawingPaint); + } +} + +void SkPDFDevice::drawVertices(const SkVertices*, sk_sp, const SkPaint&, bool) { + if (this->hasEmptyClip()) { + return; + } + // TODO: implement drawVertices +} + +#ifdef SK_ENABLE_SKSL +void SkPDFDevice::drawMesh(const SkMesh&, sk_sp, const SkPaint&) { + if (this->hasEmptyClip()) { + return; + } + // TODO: implement drawMesh +} +#endif + +void SkPDFDevice::drawFormXObject(SkPDFIndirectReference xObject, SkDynamicMemoryWStream* content) { + ScopedOutputMarkedContentTags mark(fNodeId, fDocument, content); + + SkASSERT(xObject); + SkPDFWriteResourceName(content, SkPDFResourceType::kXObject, + add_resource(fXObjectResources, xObject)); + content->writeText(" Do\n"); +} + +sk_sp SkPDFDevice::makeSurface(const SkImageInfo& info, const SkSurfaceProps& props) { + return SkSurface::MakeRaster(info, &props); +} + +static std::vector sort(const SkTHashSet& src) { + std::vector dst; + dst.reserve(src.count()); + for (SkPDFIndirectReference ref : src) { + dst.push_back(ref); + } + std::sort(dst.begin(), dst.end(), + [](SkPDFIndirectReference a, SkPDFIndirectReference b) { return a.fValue < b.fValue; }); + return dst; +} + +std::unique_ptr SkPDFDevice::makeResourceDict() { + return SkPDFMakeResourceDict(sort(fGraphicStateResources), + sort(fShaderResources), + sort(fXObjectResources), + sort(fFontResources)); +} + +std::unique_ptr SkPDFDevice::content() { + if (fActiveStackState.fContentStream) { + fActiveStackState.drainStack(); + fActiveStackState = SkPDFGraphicStackState(); + } + if (fContent.bytesWritten() == 0) { + return std::make_unique(); + } + SkDynamicMemoryWStream buffer; + if (fInitialTransform.getType() != SkMatrix::kIdentity_Mask) { + SkPDFUtils::AppendTransform(fInitialTransform, &buffer); + } + if (fNeedsExtraSave) { + buffer.writeText("q\n"); + } + fContent.writeToAndReset(&buffer); + if (fNeedsExtraSave) { + buffer.writeText("Q\n"); + } + fNeedsExtraSave = false; + return std::unique_ptr(buffer.detachAsStream()); +} + +/* Draws an inverse filled path by using Path Ops to compute the positive + * inverse using the current clip as the inverse bounds. + * Return true if this was an inverse path and was properly handled, + * otherwise returns false and the normal drawing routine should continue, + * either as a (incorrect) fallback or because the path was not inverse + * in the first place. + */ +bool SkPDFDevice::handleInversePath(const SkPath& origPath, + const SkPaint& paint, + bool pathIsMutable) { + if (!origPath.isInverseFillType()) { + return false; + } + + if (this->hasEmptyClip()) { + return false; + } + + SkPath modifiedPath; + SkPath* pathPtr = const_cast(&origPath); + SkPaint noInversePaint(paint); + + // Merge stroking operations into final path. + if (SkPaint::kStroke_Style == paint.getStyle() || + SkPaint::kStrokeAndFill_Style == paint.getStyle()) { + bool doFillPath = skpathutils::FillPathWithPaint(origPath, paint, &modifiedPath); + if (doFillPath) { + noInversePaint.setStyle(SkPaint::kFill_Style); + noInversePaint.setStrokeWidth(0); + pathPtr = &modifiedPath; + } else { + // To be consistent with the raster output, hairline strokes + // are rendered as non-inverted. + modifiedPath.toggleInverseFillType(); + this->internalDrawPath(this->cs(), this->localToDevice(), modifiedPath, paint, true); + return true; + } + } + + // Get bounds of clip in current transform space + // (clip bounds are given in device space). + SkMatrix transformInverse; + SkMatrix totalMatrix = this->localToDevice(); + + if (!totalMatrix.invert(&transformInverse)) { + return false; + } + SkRect bounds = this->cs().bounds(this->bounds()); + transformInverse.mapRect(&bounds); + + // Extend the bounds by the line width (plus some padding) + // so the edge doesn't cause a visible stroke. + bounds.outset(paint.getStrokeWidth() + SK_Scalar1, + paint.getStrokeWidth() + SK_Scalar1); + + if (!calculate_inverse_path(bounds, *pathPtr, &modifiedPath)) { + return false; + } + + this->internalDrawPath(this->cs(), this->localToDevice(), modifiedPath, noInversePaint, true); + return true; +} + +SkPDFIndirectReference SkPDFDevice::makeFormXObjectFromDevice(SkIRect bounds, bool alpha) { + SkMatrix inverseTransform = SkMatrix::I(); + if (!fInitialTransform.isIdentity()) { + if (!fInitialTransform.invert(&inverseTransform)) { + SkDEBUGFAIL("Layer initial transform should be invertible."); + inverseTransform.reset(); + } + } + const char* colorSpace = alpha ? "DeviceGray" : nullptr; + + SkPDFIndirectReference xobject = + SkPDFMakeFormXObject(fDocument, this->content(), + SkPDFMakeArray(bounds.left(), bounds.top(), + bounds.right(), bounds.bottom()), + this->makeResourceDict(), inverseTransform, colorSpace); + // We always draw the form xobjects that we create back into the device, so + // we simply preserve the font usage instead of pulling it out and merging + // it back in later. + this->reset(); + return xobject; +} + +SkPDFIndirectReference SkPDFDevice::makeFormXObjectFromDevice(bool alpha) { + return this->makeFormXObjectFromDevice(SkIRect{0, 0, this->width(), this->height()}, alpha); +} + +void SkPDFDevice::drawFormXObjectWithMask(SkPDFIndirectReference xObject, + SkPDFIndirectReference sMask, + SkBlendMode mode, + bool invertClip) { + SkASSERT(sMask); + SkPaint paint; + paint.setBlendMode(mode); + ScopedContentEntry content(this, nullptr, SkMatrix::I(), paint); + if (!content) { + return; + } + this->setGraphicState(SkPDFGraphicState::GetSMaskGraphicState( + sMask, invertClip, SkPDFGraphicState::kAlpha_SMaskMode, + fDocument), content.stream()); + this->drawFormXObject(xObject, content.stream()); + this->clearMaskOnGraphicState(content.stream()); +} + + +static bool treat_as_regular_pdf_blend_mode(SkBlendMode blendMode) { + return nullptr != SkPDFUtils::BlendModeName(blendMode); +} + +static void populate_graphic_state_entry_from_paint( + SkPDFDocument* doc, + const SkMatrix& matrix, + const SkClipStack* clipStack, + SkIRect deviceBounds, + const SkPaint& paint, + const SkMatrix& initialTransform, + SkScalar textScale, + SkPDFGraphicStackState::Entry* entry, + SkTHashSet* shaderResources, + SkTHashSet* graphicStateResources) { + NOT_IMPLEMENTED(paint.getPathEffect() != nullptr, false); + NOT_IMPLEMENTED(paint.getMaskFilter() != nullptr, false); + NOT_IMPLEMENTED(paint.getColorFilter() != nullptr, false); + + entry->fMatrix = matrix; + entry->fClipStackGenID = clipStack ? clipStack->getTopmostGenID() + : SkClipStack::kWideOpenGenID; + SkColor4f color = paint.getColor4f(); + entry->fColor = {color.fR, color.fG, color.fB, 1}; + entry->fShaderIndex = -1; + + // PDF treats a shader as a color, so we only set one or the other. + SkShader* shader = paint.getShader(); + if (shader) { + // note: we always present the alpha as 1 for the shader, knowing that it will be + // accounted for when we create our newGraphicsState (below) + if (as_SB(shader)->asGradient() == SkShaderBase::GradientType::kColor) { + // We don't have to set a shader just for a color. + SkShaderBase::GradientInfo gradientInfo; + SkColor gradientColor = SK_ColorBLACK; + gradientInfo.fColors = &gradientColor; + gradientInfo.fColorOffsets = nullptr; + gradientInfo.fColorCount = 1; + SkAssertResult(as_SB(shader)->asGradient(&gradientInfo) == + SkShaderBase::GradientType::kColor); + color = SkColor4f::FromColor(gradientColor); + entry->fColor ={color.fR, color.fG, color.fB, 1}; + + } else { + // PDF positions patterns relative to the initial transform, so + // we need to apply the current transform to the shader parameters. + SkMatrix transform = matrix; + transform.postConcat(initialTransform); + + // PDF doesn't support kClamp_TileMode, so we simulate it by making + // a pattern the size of the current clip. + SkRect clipStackBounds = clipStack ? clipStack->bounds(deviceBounds) + : SkRect::Make(deviceBounds); + + // We need to apply the initial transform to bounds in order to get + // bounds in a consistent coordinate system. + initialTransform.mapRect(&clipStackBounds); + SkIRect bounds; + clipStackBounds.roundOut(&bounds); + + auto c = paint.getColor4f(); + SkPDFIndirectReference pdfShader = SkPDFMakeShader(doc, shader, transform, bounds, + {c.fR, c.fG, c.fB, 1.0f}); + + if (pdfShader) { + // pdfShader has been canonicalized so we can directly compare pointers. + entry->fShaderIndex = add_resource(*shaderResources, pdfShader); + } + } + } + + SkPDFIndirectReference newGraphicState; + if (color == paint.getColor4f()) { + newGraphicState = SkPDFGraphicState::GetGraphicStateForPaint(doc, paint); + } else { + SkPaint newPaint = paint; + newPaint.setColor4f(color, nullptr); + newGraphicState = SkPDFGraphicState::GetGraphicStateForPaint(doc, newPaint); + } + entry->fGraphicStateIndex = add_resource(*graphicStateResources, newGraphicState); + entry->fTextScaleX = textScale; +} + +SkDynamicMemoryWStream* SkPDFDevice::setUpContentEntry(const SkClipStack* clipStack, + const SkMatrix& matrix, + const SkPaint& paint, + SkScalar textScale, + SkPDFIndirectReference* dst) { + SkASSERT(!*dst); + SkBlendMode blendMode = paint.getBlendMode_or(SkBlendMode::kSrcOver); + + // Dst xfer mode doesn't draw source at all. + if (blendMode == SkBlendMode::kDst) { + return nullptr; + } + + // For the following modes, we want to handle source and destination + // separately, so make an object of what's already there. + if (!treat_as_regular_pdf_blend_mode(blendMode) && blendMode != SkBlendMode::kDstOver) { + if (!isContentEmpty()) { + *dst = this->makeFormXObjectFromDevice(); + SkASSERT(isContentEmpty()); + } else if (blendMode != SkBlendMode::kSrc && + blendMode != SkBlendMode::kSrcOut) { + // Except for Src and SrcOut, if there isn't anything already there, + // then we're done. + return nullptr; + } + } + // TODO(vandebo): Figure out how/if we can handle the following modes: + // Xor, Plus. For now, we treat them as SrcOver/Normal. + + if (treat_as_regular_pdf_blend_mode(blendMode)) { + if (!fActiveStackState.fContentStream) { + if (fContent.bytesWritten() != 0) { + fContent.writeText("Q\nq\n"); + fNeedsExtraSave = true; + } + fActiveStackState = SkPDFGraphicStackState(&fContent); + } else { + SkASSERT(fActiveStackState.fContentStream = &fContent); + } + } else { + fActiveStackState.drainStack(); + fActiveStackState = SkPDFGraphicStackState(&fContentBuffer); + } + SkASSERT(fActiveStackState.fContentStream); + SkPDFGraphicStackState::Entry entry; + populate_graphic_state_entry_from_paint( + fDocument, + matrix, + clipStack, + this->bounds(), + paint, + fInitialTransform, + textScale, + &entry, + &fShaderResources, + &fGraphicStateResources); + fActiveStackState.updateClip(clipStack, this->bounds()); + fActiveStackState.updateMatrix(entry.fMatrix); + fActiveStackState.updateDrawingState(entry); + + return fActiveStackState.fContentStream; +} + +void SkPDFDevice::finishContentEntry(const SkClipStack* clipStack, + SkBlendMode blendMode, + SkPDFIndirectReference dst, + SkPath* shape) { + SkASSERT(blendMode != SkBlendMode::kDst); + if (treat_as_regular_pdf_blend_mode(blendMode)) { + SkASSERT(!dst); + return; + } + + SkASSERT(fActiveStackState.fContentStream); + + fActiveStackState.drainStack(); + fActiveStackState = SkPDFGraphicStackState(); + + if (blendMode == SkBlendMode::kDstOver) { + SkASSERT(!dst); + if (fContentBuffer.bytesWritten() != 0) { + if (fContent.bytesWritten() != 0) { + fContentBuffer.writeText("Q\nq\n"); + fNeedsExtraSave = true; + } + fContentBuffer.prependToAndReset(&fContent); + SkASSERT(fContentBuffer.bytesWritten() == 0); + } + return; + } + if (fContentBuffer.bytesWritten() != 0) { + if (fContent.bytesWritten() != 0) { + fContent.writeText("Q\nq\n"); + fNeedsExtraSave = true; + } + fContentBuffer.writeToAndReset(&fContent); + SkASSERT(fContentBuffer.bytesWritten() == 0); + } + + if (!dst) { + SkASSERT(blendMode == SkBlendMode::kSrc || + blendMode == SkBlendMode::kSrcOut); + return; + } + + SkASSERT(dst); + // Changing the current content into a form-xobject will destroy the clip + // objects which is fine since the xobject will already be clipped. However + // if source has shape, we need to clip it too, so a copy of the clip is + // saved. + + SkPaint stockPaint; + + SkPDFIndirectReference srcFormXObject; + if (this->isContentEmpty()) { + // If nothing was drawn and there's no shape, then the draw was a + // no-op, but dst needs to be restored for that to be true. + // If there is shape, then an empty source with Src, SrcIn, SrcOut, + // DstIn, DstAtop or Modulate reduces to Clear and DstOut or SrcAtop + // reduces to Dst. + if (shape == nullptr || blendMode == SkBlendMode::kDstOut || + blendMode == SkBlendMode::kSrcATop) { + ScopedContentEntry content(this, nullptr, SkMatrix::I(), stockPaint); + this->drawFormXObject(dst, content.stream()); + return; + } else { + blendMode = SkBlendMode::kClear; + } + } else { + srcFormXObject = this->makeFormXObjectFromDevice(); + } + + // TODO(vandebo) srcFormXObject may contain alpha, but here we want it + // without alpha. + if (blendMode == SkBlendMode::kSrcATop) { + // TODO(vandebo): In order to properly support SrcATop we have to track + // the shape of what's been drawn at all times. It's the intersection of + // the non-transparent parts of the device and the outlines (shape) of + // all images and devices drawn. + this->drawFormXObjectWithMask(srcFormXObject, dst, SkBlendMode::kSrcOver, true); + } else { + if (shape != nullptr) { + // Draw shape into a form-xobject. + SkPaint filledPaint; + filledPaint.setColor(SK_ColorBLACK); + filledPaint.setStyle(SkPaint::kFill_Style); + SkClipStack empty; + SkPDFDevice shapeDev(this->size(), fDocument, fInitialTransform); + shapeDev.internalDrawPath(clipStack ? *clipStack : empty, + SkMatrix::I(), *shape, filledPaint, true); + this->drawFormXObjectWithMask(dst, shapeDev.makeFormXObjectFromDevice(), + SkBlendMode::kSrcOver, true); + } else { + this->drawFormXObjectWithMask(dst, srcFormXObject, SkBlendMode::kSrcOver, true); + } + } + + if (blendMode == SkBlendMode::kClear) { + return; + } else if (blendMode == SkBlendMode::kSrc || + blendMode == SkBlendMode::kDstATop) { + ScopedContentEntry content(this, nullptr, SkMatrix::I(), stockPaint); + if (content) { + this->drawFormXObject(srcFormXObject, content.stream()); + } + if (blendMode == SkBlendMode::kSrc) { + return; + } + } else if (blendMode == SkBlendMode::kSrcATop) { + ScopedContentEntry content(this, nullptr, SkMatrix::I(), stockPaint); + if (content) { + this->drawFormXObject(dst, content.stream()); + } + } + + SkASSERT(blendMode == SkBlendMode::kSrcIn || + blendMode == SkBlendMode::kDstIn || + blendMode == SkBlendMode::kSrcOut || + blendMode == SkBlendMode::kDstOut || + blendMode == SkBlendMode::kSrcATop || + blendMode == SkBlendMode::kDstATop || + blendMode == SkBlendMode::kModulate); + + if (blendMode == SkBlendMode::kSrcIn || + blendMode == SkBlendMode::kSrcOut || + blendMode == SkBlendMode::kSrcATop) { + this->drawFormXObjectWithMask(srcFormXObject, dst, SkBlendMode::kSrcOver, + blendMode == SkBlendMode::kSrcOut); + return; + } else { + SkBlendMode mode = SkBlendMode::kSrcOver; + if (blendMode == SkBlendMode::kModulate) { + this->drawFormXObjectWithMask(srcFormXObject, dst, SkBlendMode::kSrcOver, false); + mode = SkBlendMode::kMultiply; + } + this->drawFormXObjectWithMask(dst, srcFormXObject, mode, blendMode == SkBlendMode::kDstOut); + return; + } +} + +bool SkPDFDevice::isContentEmpty() { + return fContent.bytesWritten() == 0 && fContentBuffer.bytesWritten() == 0; +} + +static SkSize rect_to_size(const SkRect& r) { return {r.width(), r.height()}; } + +static sk_sp color_filter(const SkImage* image, + SkColorFilter* colorFilter) { + auto surface = + SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(image->dimensions())); + SkASSERT(surface); + SkCanvas* canvas = surface->getCanvas(); + canvas->clear(SK_ColorTRANSPARENT); + SkPaint paint; + paint.setColorFilter(sk_ref_sp(colorFilter)); + canvas->drawImage(image, 0, 0, SkSamplingOptions(), &paint); + return surface->makeImageSnapshot(); +} + +//////////////////////////////////////////////////////////////////////////////// + +static bool is_integer(SkScalar x) { + return x == SkScalarTruncToScalar(x); +} + +static bool is_integral(const SkRect& r) { + return is_integer(r.left()) && + is_integer(r.top()) && + is_integer(r.right()) && + is_integer(r.bottom()); +} + +void SkPDFDevice::internalDrawImageRect(SkKeyedImage imageSubset, + const SkRect* src, + const SkRect& dst, + const SkSamplingOptions& sampling, + const SkPaint& srcPaint, + const SkMatrix& ctm) { + if (this->hasEmptyClip()) { + return; + } + if (!imageSubset) { + return; + } + + // First, figure out the src->dst transform and subset the image if needed. + SkIRect bounds = imageSubset.image()->bounds(); + SkRect srcRect = src ? *src : SkRect::Make(bounds); + SkMatrix transform = SkMatrix::RectToRect(srcRect, dst); + if (src && *src != SkRect::Make(bounds)) { + if (!srcRect.intersect(SkRect::Make(bounds))) { + return; + } + srcRect.roundOut(&bounds); + transform.preTranslate(SkIntToScalar(bounds.x()), + SkIntToScalar(bounds.y())); + if (bounds != imageSubset.image()->bounds()) { + imageSubset = imageSubset.subset(bounds); + } + if (!imageSubset) { + return; + } + } + + // If the image is opaque and the paint's alpha is too, replace + // kSrc blendmode with kSrcOver. http://crbug.com/473572 + SkTCopyOnFirstWrite paint(srcPaint); + if (!paint->isSrcOver() && + imageSubset.image()->isOpaque() && + kSrcOver_SkXfermodeInterpretation == SkInterpretXfermode(*paint, false)) + { + paint.writable()->setBlendMode(SkBlendMode::kSrcOver); + } + + // Alpha-only images need to get their color from the shader, before + // applying the colorfilter. + if (imageSubset.image()->isAlphaOnly() && paint->getColorFilter()) { + // must blend alpha image and shader before applying colorfilter. + auto surface = + SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(imageSubset.image()->dimensions())); + SkCanvas* canvas = surface->getCanvas(); + SkPaint tmpPaint; + // In the case of alpha images with shaders, the shader's coordinate + // system is the image's coordiantes. + tmpPaint.setShader(sk_ref_sp(paint->getShader())); + tmpPaint.setColor4f(paint->getColor4f(), nullptr); + canvas->clear(0x00000000); + canvas->drawImage(imageSubset.image().get(), 0, 0, sampling, &tmpPaint); + if (paint->getShader() != nullptr) { + paint.writable()->setShader(nullptr); + } + imageSubset = SkKeyedImage(surface->makeImageSnapshot()); + SkASSERT(!imageSubset.image()->isAlphaOnly()); + } + + if (imageSubset.image()->isAlphaOnly()) { + // The ColorFilter applies to the paint color/shader, not the alpha layer. + SkASSERT(nullptr == paint->getColorFilter()); + + sk_sp mask = alpha_image_to_greyscale_image(imageSubset.image().get()); + if (!mask) { + return; + } + // PDF doesn't seem to allow masking vector graphics with an Image XObject. + // Must mask with a Form XObject. + sk_sp maskDevice = this->makeCongruentDevice(); + { + SkCanvas canvas(maskDevice); + // This clip prevents the mask image shader from covering + // entire device if unnecessary. + canvas.clipRect(this->cs().bounds(this->bounds())); + canvas.concat(ctm); + if (paint->getMaskFilter()) { + SkPaint tmpPaint; + tmpPaint.setShader(mask->makeShader(SkSamplingOptions(), transform)); + tmpPaint.setMaskFilter(sk_ref_sp(paint->getMaskFilter())); + canvas.drawRect(dst, tmpPaint); + } else { + if (src && !is_integral(*src)) { + canvas.clipRect(dst); + } + canvas.concat(transform); + canvas.drawImage(mask, 0, 0); + } + } + SkIRect maskDeviceBounds = maskDevice->cs().bounds(maskDevice->bounds()).roundOut(); + if (!ctm.isIdentity() && paint->getShader()) { + transform_shader(paint.writable(), ctm); // Since we are using identity matrix. + } + ScopedContentEntry content(this, &this->cs(), SkMatrix::I(), *paint); + if (!content) { + return; + } + this->setGraphicState(SkPDFGraphicState::GetSMaskGraphicState( + maskDevice->makeFormXObjectFromDevice(maskDeviceBounds, true), false, + SkPDFGraphicState::kLuminosity_SMaskMode, fDocument), content.stream()); + SkPDFUtils::AppendRectangle(SkRect::Make(this->size()), content.stream()); + SkPDFUtils::PaintPath(SkPaint::kFill_Style, SkPathFillType::kWinding, content.stream()); + this->clearMaskOnGraphicState(content.stream()); + return; + } + if (paint->getMaskFilter()) { + paint.writable()->setShader(imageSubset.image()->makeShader(SkSamplingOptions(), + transform)); + SkPath path = SkPath::Rect(dst); // handles non-integral clipping. + this->internalDrawPath(this->cs(), this->localToDevice(), path, *paint, true); + return; + } + transform.postConcat(ctm); + + bool needToRestore = false; + if (src && !is_integral(*src)) { + // Need sub-pixel clipping to fix https://bug.skia.org/4374 + this->cs().save(); + this->cs().clipRect(dst, ctm, SkClipOp::kIntersect, true); + needToRestore = true; + } + SK_AT_SCOPE_EXIT(if (needToRestore) { this->cs().restore(); }); + + SkMatrix matrix = transform; + + // Rasterize the bitmap using perspective in a new bitmap. + if (transform.hasPerspective()) { + // Transform the bitmap in the new space, without taking into + // account the initial transform. + SkRect imageBounds = SkRect::Make(imageSubset.image()->bounds()); + SkPath perspectiveOutline = SkPath::Rect(imageBounds).makeTransform(transform); + + // Retrieve the bounds of the new shape. + SkRect outlineBounds = perspectiveOutline.getBounds(); + if (!outlineBounds.intersect(SkRect::Make(this->devClipBounds()))) { + return; + } + + // Transform the bitmap in the new space to the final space, to account for DPI + SkRect physicalBounds = fInitialTransform.mapRect(outlineBounds); + SkScalar scaleX = physicalBounds.width() / outlineBounds.width(); + SkScalar scaleY = physicalBounds.height() / outlineBounds.height(); + + // TODO(edisonn): A better approach would be to use a bitmap shader + // (in clamp mode) and draw a rect over the entire bounding box. Then + // intersect perspectiveOutline to the clip. That will avoid introducing + // alpha to the image while still giving good behavior at the edge of + // the image. Avoiding alpha will reduce the pdf size and generation + // CPU time some. + + SkISize wh = rect_to_size(physicalBounds).toCeil(); + + auto surface = SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(wh)); + if (!surface) { + return; + } + SkCanvas* canvas = surface->getCanvas(); + canvas->clear(SK_ColorTRANSPARENT); + + SkScalar deltaX = outlineBounds.left(); + SkScalar deltaY = outlineBounds.top(); + + SkMatrix offsetMatrix = transform; + offsetMatrix.postTranslate(-deltaX, -deltaY); + offsetMatrix.postScale(scaleX, scaleY); + + // Translate the draw in the new canvas, so we perfectly fit the + // shape in the bitmap. + canvas->setMatrix(offsetMatrix); + canvas->drawImage(imageSubset.image(), 0, 0); + // Make sure the final bits are in the bitmap. + surface->flushAndSubmit(); + + // In the new space, we use the identity matrix translated + // and scaled to reflect DPI. + matrix.setScale(1 / scaleX, 1 / scaleY); + matrix.postTranslate(deltaX, deltaY); + + imageSubset = SkKeyedImage(surface->makeImageSnapshot()); + if (!imageSubset) { + return; + } + } + + SkMatrix scaled; + // Adjust for origin flip. + scaled.setScale(SK_Scalar1, -SK_Scalar1); + scaled.postTranslate(0, SK_Scalar1); + // Scale the image up from 1x1 to WxH. + SkIRect subset = imageSubset.image()->bounds(); + scaled.postScale(SkIntToScalar(subset.width()), + SkIntToScalar(subset.height())); + scaled.postConcat(matrix); + ScopedContentEntry content(this, &this->cs(), scaled, *paint); + if (!content) { + return; + } + if (content.needShape()) { + SkPath shape = SkPath::Rect(SkRect::Make(subset)).makeTransform(matrix); + content.setShape(shape); + } + if (!content.needSource()) { + return; + } + + if (SkColorFilter* colorFilter = paint->getColorFilter()) { + sk_sp img = color_filter(imageSubset.image().get(), colorFilter); + imageSubset = SkKeyedImage(std::move(img)); + if (!imageSubset) { + return; + } + // TODO(halcanary): de-dupe this by caching filtered images. + // (maybe in the resource cache?) + } + + SkBitmapKey key = imageSubset.key(); + SkPDFIndirectReference* pdfimagePtr = fDocument->fPDFBitmapMap.find(key); + SkPDFIndirectReference pdfimage = pdfimagePtr ? *pdfimagePtr : SkPDFIndirectReference(); + if (!pdfimagePtr) { + SkASSERT(imageSubset); + pdfimage = SkPDFSerializeImage(imageSubset.image().get(), fDocument, + fDocument->metadata().fEncodingQuality); + SkASSERT((key != SkBitmapKey{{0, 0, 0, 0}, 0})); + fDocument->fPDFBitmapMap.set(key, pdfimage); + } + SkASSERT(pdfimage != SkPDFIndirectReference()); + this->drawFormXObject(pdfimage, content.stream()); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + + +void SkPDFDevice::drawDevice(SkBaseDevice* device, const SkSamplingOptions& sampling, + const SkPaint& paint) { + SkASSERT(!paint.getImageFilter()); + SkASSERT(!paint.getMaskFilter()); + + // Check if the source device is really a bitmapdevice (because that's what we returned + // from createDevice (an image filter would go through drawSpecial, but createDevice uses + // a raster device to apply color filters, too). + SkPixmap pmap; + if (device->peekPixels(&pmap)) { + this->INHERITED::drawDevice(device, sampling, paint); + return; + } + + // our onCreateCompatibleDevice() always creates SkPDFDevice subclasses. + SkPDFDevice* pdfDevice = static_cast(device); + + if (pdfDevice->isContentEmpty()) { + return; + } + + SkMatrix matrix = device->getRelativeTransform(*this); + ScopedContentEntry content(this, &this->cs(), matrix, paint); + if (!content) { + return; + } + if (content.needShape()) { + SkPath shape = SkPath::Rect(SkRect::Make(device->imageInfo().dimensions())); + shape.transform(matrix); + content.setShape(shape); + } + if (!content.needSource()) { + return; + } + this->drawFormXObject(pdfDevice->makeFormXObjectFromDevice(), content.stream()); +} + +void SkPDFDevice::drawSpecial(SkSpecialImage* srcImg, const SkMatrix& localToDevice, + const SkSamplingOptions& sampling, const SkPaint& paint) { + if (this->hasEmptyClip()) { + return; + } + SkASSERT(!srcImg->isTextureBacked()); + SkASSERT(!paint.getMaskFilter() && !paint.getImageFilter()); + + SkBitmap resultBM; + if (srcImg->getROPixels(&resultBM)) { + auto r = SkRect::MakeWH(resultBM.width(), resultBM.height()); + this->internalDrawImageRect(SkKeyedImage(resultBM), nullptr, r, sampling, paint, + localToDevice); + } +} + +sk_sp SkPDFDevice::makeSpecial(const SkBitmap& bitmap) { + return SkSpecialImage::MakeFromRaster(bitmap.bounds(), bitmap, this->surfaceProps()); +} + +sk_sp SkPDFDevice::makeSpecial(const SkImage* image) { + return SkSpecialImage::MakeFromImage(nullptr, image->bounds(), image->makeNonTextureImage(), + this->surfaceProps()); +} + +SkImageFilterCache* SkPDFDevice::getImageFilterCache() { + // We always return a transient cache, so it is freed after each + // filter traversal. + return SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFDevice.h b/gfx/skia/skia/src/pdf/SkPDFDevice.h new file mode 100644 index 0000000000..28ca1ca919 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFDevice.h @@ -0,0 +1,209 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPDFDevice_DEFINED +#define SkPDFDevice_DEFINED + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkData.h" +#include "include/core/SkPaint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "src/core/SkClipStack.h" +#include "src/core/SkClipStackDevice.h" +#include "src/core/SkTHash.h" +#include "src/core/SkTextBlobPriv.h" +#include "src/pdf/SkKeyedImage.h" +#include "src/pdf/SkPDFGraphicStackState.h" +#include "src/pdf/SkPDFTypes.h" + +#include + +namespace sktext { +class GlyphRun; +class GlyphRunList; +} + +class SkKeyedImage; +class SkPDFArray; +class SkPDFDevice; +class SkPDFDict; +class SkPDFDocument; +class SkPDFFont; +class SkPDFObject; +class SkPath; +class SkRRect; +struct SkPDFIndirectReference; + +/** + * \class SkPDFDevice + * + * An SkPDFDevice is the drawing context for a page or layer of PDF + * content. + */ +class SkPDFDevice final : public SkClipStackDevice { +public: + /** + * @param pageSize Page size in point units. + * 1 point == 127/360 mm == 1/72 inch + * @param document A non-null pointer back to the + * PDFDocument object. The document is responsible for + * de-duplicating across pages (via the SkPDFDocument) and + * for early serializing of large immutable objects, such + * as images (via SkPDFDocument::serialize()). + * @param initialTransform Transform to be applied to the entire page. + */ + SkPDFDevice(SkISize pageSize, SkPDFDocument* document, + const SkMatrix& initialTransform = SkMatrix::I()); + + sk_sp makeCongruentDevice() { + return sk_make_sp(this->size(), fDocument); + } + + ~SkPDFDevice() override; + + /** + * These are called inside the per-device-layer loop for each draw call. + * When these are called, we have already applied any saveLayer + * operations, and are handling any looping from the paint. + */ + void drawPaint(const SkPaint& paint) override; + void drawPoints(SkCanvas::PointMode mode, + size_t count, const SkPoint[], + const SkPaint& paint) override; + void drawRect(const SkRect& r, const SkPaint& paint) override; + void drawOval(const SkRect& oval, const SkPaint& paint) override; + void drawRRect(const SkRRect& rr, const SkPaint& paint) override; + void drawPath(const SkPath& origpath, const SkPaint& paint, bool pathIsMutable) override; + + void drawImageRect(const SkImage*, + const SkRect* src, + const SkRect& dst, + const SkSamplingOptions&, + const SkPaint&, + SkCanvas::SrcRectConstraint) override; + void onDrawGlyphRunList(SkCanvas*, + const sktext::GlyphRunList&, + const SkPaint& initialPaint, + const SkPaint& drawingPaint) override; + void drawVertices(const SkVertices*, sk_sp, const SkPaint&, bool) override; +#ifdef SK_ENABLE_SKSL + void drawMesh(const SkMesh&, sk_sp, const SkPaint&) override; +#endif + + // PDF specific methods. + void drawSprite(const SkBitmap& bitmap, int x, int y, + const SkPaint& paint); + + /** Create the resource dictionary for this device. Destructive. */ + std::unique_ptr makeResourceDict(); + + /** Returns a SkStream with the page contents. + */ + std::unique_ptr content(); + + SkISize size() const { return this->imageInfo().dimensions(); } + SkIRect bounds() const { return this->imageInfo().bounds(); } + + const SkMatrix& initialTransform() const { return fInitialTransform; } + +protected: + sk_sp makeSurface(const SkImageInfo&, const SkSurfaceProps&) override; + + void drawAnnotation(const SkRect&, const char key[], SkData* value) override; + + void drawDevice(SkBaseDevice*, const SkSamplingOptions&, const SkPaint&) override; + void drawSpecial(SkSpecialImage*, const SkMatrix&, const SkSamplingOptions&, + const SkPaint&) override; + + sk_sp makeSpecial(const SkBitmap&) override; + sk_sp makeSpecial(const SkImage*) override; + SkImageFilterCache* getImageFilterCache() override; + +private: + // TODO(vandebo): push most of SkPDFDevice's state into a core object in + // order to get the right access levels without using friend. + friend class ScopedContentEntry; + + SkMatrix fInitialTransform; + + SkTHashSet fGraphicStateResources; + SkTHashSet fXObjectResources; + SkTHashSet fShaderResources; + SkTHashSet fFontResources; + int fNodeId; + + SkDynamicMemoryWStream fContent; + SkDynamicMemoryWStream fContentBuffer; + bool fNeedsExtraSave = false; + SkPDFGraphicStackState fActiveStackState; + SkPDFDocument* fDocument; + + //////////////////////////////////////////////////////////////////////////// + + SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override; + + // Set alpha to true if making a transparency group form x-objects. + SkPDFIndirectReference makeFormXObjectFromDevice(bool alpha = false); + SkPDFIndirectReference makeFormXObjectFromDevice(SkIRect bbox, bool alpha = false); + + void drawFormXObjectWithMask(SkPDFIndirectReference xObject, + SkPDFIndirectReference sMask, + SkBlendMode, + bool invertClip); + + // If the paint or clip is such that we shouldn't draw anything, this + // returns nullptr and does not create a content entry. + // setUpContentEntry and finishContentEntry can be used directly, but + // the preferred method is to use the ScopedContentEntry helper class. + SkDynamicMemoryWStream* setUpContentEntry(const SkClipStack* clipStack, + const SkMatrix& matrix, + const SkPaint& paint, + SkScalar, + SkPDFIndirectReference* dst); + void finishContentEntry(const SkClipStack*, SkBlendMode, SkPDFIndirectReference, SkPath*); + bool isContentEmpty(); + + void internalDrawGlyphRun( + const sktext::GlyphRun& glyphRun, SkPoint offset, const SkPaint& runPaint); + void drawGlyphRunAsPath( + const sktext::GlyphRun& glyphRun, SkPoint offset, const SkPaint& runPaint); + + void internalDrawImageRect(SkKeyedImage, + const SkRect* src, + const SkRect& dst, + const SkSamplingOptions&, + const SkPaint&, + const SkMatrix& canvasTransformationMatrix); + + void internalDrawPath(const SkClipStack&, + const SkMatrix&, + const SkPath&, + const SkPaint&, + bool pathIsMutable); + + void internalDrawPathWithFilter(const SkClipStack& clipStack, + const SkMatrix& ctm, + const SkPath& origPath, + const SkPaint& paint); + + bool handleInversePath(const SkPath& origPath, const SkPaint& paint, bool pathIsMutable); + + void clearMaskOnGraphicState(SkDynamicMemoryWStream*); + void setGraphicState(SkPDFIndirectReference gs, SkDynamicMemoryWStream*); + void drawFormXObject(SkPDFIndirectReference xObject, SkDynamicMemoryWStream*); + + bool hasEmptyClip() const { return this->cs().isEmpty(this->bounds()); } + + void reset(); + + using INHERITED = SkClipStackDevice; +}; + +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFDocument.cpp b/gfx/skia/skia/src/pdf/SkPDFDocument.cpp new file mode 100644 index 0000000000..3946f6054a --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFDocument.cpp @@ -0,0 +1,641 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/docs/SkPDFDocument.h" +#include "src/pdf/SkPDFDocumentPriv.h" + +#include "include/core/SkStream.h" +#include "include/docs/SkPDFDocument.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkUTF.h" +#include "src/pdf/SkPDFDevice.h" +#include "src/pdf/SkPDFFont.h" +#include "src/pdf/SkPDFGradientShader.h" +#include "src/pdf/SkPDFGraphicState.h" +#include "src/pdf/SkPDFShader.h" +#include "src/pdf/SkPDFTag.h" +#include "src/pdf/SkPDFUtils.h" + +#include + +// For use in SkCanvas::drawAnnotation +const char* SkPDFGetNodeIdKey() { + static constexpr char key[] = "PDF_Node_Key"; + return key; +} + +static SkString ToValidUtf8String(const SkData& d) { + if (d.size() == 0) { + SkDEBUGFAIL("Not a valid string, data length is zero."); + return SkString(); + } + + const char* c_str = static_cast(d.data()); + if (c_str[d.size() - 1] != 0) { + SkDEBUGFAIL("Not a valid string, not null-terminated."); + return SkString(); + } + + // CountUTF8 returns -1 if there's an invalid UTF-8 byte sequence. + int valid_utf8_chars_count = SkUTF::CountUTF8(c_str, d.size() - 1); + if (valid_utf8_chars_count == -1) { + SkDEBUGFAIL("Not a valid UTF-8 string."); + return SkString(); + } + + return SkString(c_str, d.size() - 1); +} + +//////////////////////////////////////////////////////////////////////////////// + +void SkPDFOffsetMap::markStartOfDocument(const SkWStream* s) { fBaseOffset = s->bytesWritten(); } + +static size_t difference(size_t minuend, size_t subtrahend) { + return SkASSERT(minuend >= subtrahend), minuend - subtrahend; +} + +void SkPDFOffsetMap::markStartOfObject(int referenceNumber, const SkWStream* s) { + SkASSERT(referenceNumber > 0); + size_t index = SkToSizeT(referenceNumber - 1); + if (index >= fOffsets.size()) { + fOffsets.resize(index + 1); + } + fOffsets[index] = SkToInt(difference(s->bytesWritten(), fBaseOffset)); +} + +int SkPDFOffsetMap::objectCount() const { + return SkToInt(fOffsets.size() + 1); // Include the special zeroth object in the count. +} + +int SkPDFOffsetMap::emitCrossReferenceTable(SkWStream* s) const { + int xRefFileOffset = SkToInt(difference(s->bytesWritten(), fBaseOffset)); + s->writeText("xref\n0 "); + s->writeDecAsText(this->objectCount()); + s->writeText("\n0000000000 65535 f \n"); + for (int offset : fOffsets) { + SkASSERT(offset > 0); // Offset was set. + s->writeBigDecAsText(offset, 10); + s->writeText(" 00000 n \n"); + } + return xRefFileOffset; +} +// +//////////////////////////////////////////////////////////////////////////////// + +#define SKPDF_MAGIC "\xD3\xEB\xE9\xE1" +#ifndef SK_BUILD_FOR_WIN +static_assert((SKPDF_MAGIC[0] & 0x7F) == "Skia"[0], ""); +static_assert((SKPDF_MAGIC[1] & 0x7F) == "Skia"[1], ""); +static_assert((SKPDF_MAGIC[2] & 0x7F) == "Skia"[2], ""); +static_assert((SKPDF_MAGIC[3] & 0x7F) == "Skia"[3], ""); +#endif +static void serializeHeader(SkPDFOffsetMap* offsetMap, SkWStream* wStream) { + offsetMap->markStartOfDocument(wStream); + wStream->writeText("%PDF-1.4\n%" SKPDF_MAGIC "\n"); + // The PDF spec recommends including a comment with four + // bytes, all with their high bits set. "\xD3\xEB\xE9\xE1" is + // "Skia" with the high bits set. +} +#undef SKPDF_MAGIC + +static void begin_indirect_object(SkPDFOffsetMap* offsetMap, + SkPDFIndirectReference ref, + SkWStream* s) { + offsetMap->markStartOfObject(ref.fValue, s); + s->writeDecAsText(ref.fValue); + s->writeText(" 0 obj\n"); // Generation number is always 0. +} + +static void end_indirect_object(SkWStream* s) { s->writeText("\nendobj\n"); } + +// Xref table and footer +static void serialize_footer(const SkPDFOffsetMap& offsetMap, + SkWStream* wStream, + SkPDFIndirectReference infoDict, + SkPDFIndirectReference docCatalog, + SkUUID uuid) { + int xRefFileOffset = offsetMap.emitCrossReferenceTable(wStream); + SkPDFDict trailerDict; + trailerDict.insertInt("Size", offsetMap.objectCount()); + SkASSERT(docCatalog != SkPDFIndirectReference()); + trailerDict.insertRef("Root", docCatalog); + SkASSERT(infoDict != SkPDFIndirectReference()); + trailerDict.insertRef("Info", infoDict); + if (SkUUID() != uuid) { + trailerDict.insertObject("ID", SkPDFMetadata::MakePdfId(uuid, uuid)); + } + wStream->writeText("trailer\n"); + trailerDict.emitObject(wStream); + wStream->writeText("\nstartxref\n"); + wStream->writeBigDecAsText(xRefFileOffset); + wStream->writeText("\n%%EOF"); +} + +static SkPDFIndirectReference generate_page_tree( + SkPDFDocument* doc, + std::vector> pages, + const std::vector& pageRefs) { + // PDF wants a tree describing all the pages in the document. We arbitrary + // choose 8 (kNodeSize) as the number of allowed children. The internal + // nodes have type "Pages" with an array of children, a parent pointer, and + // the number of leaves below the node as "Count." The leaves are passed + // into the method, have type "Page" and need a parent pointer. This method + // builds the tree bottom up, skipping internal nodes that would have only + // one child. + SkASSERT(pages.size() > 0); + struct PageTreeNode { + std::unique_ptr fNode; + SkPDFIndirectReference fReservedRef; + int fPageObjectDescendantCount; + + static std::vector Layer(std::vector vec, SkPDFDocument* doc) { + std::vector result; + static constexpr size_t kMaxNodeSize = 8; + const size_t n = vec.size(); + SkASSERT(n >= 1); + const size_t result_len = (n - 1) / kMaxNodeSize + 1; + SkASSERT(result_len >= 1); + SkASSERT(n == 1 || result_len < n); + result.reserve(result_len); + size_t index = 0; + for (size_t i = 0; i < result_len; ++i) { + if (n != 1 && index + 1 == n) { // No need to create a new node. + result.push_back(std::move(vec[index++])); + continue; + } + SkPDFIndirectReference parent = doc->reserveRef(); + auto kids_list = SkPDFMakeArray(); + int descendantCount = 0; + for (size_t j = 0; j < kMaxNodeSize && index < n; ++j) { + PageTreeNode& node = vec[index++]; + node.fNode->insertRef("Parent", parent); + kids_list->appendRef(doc->emit(*node.fNode, node.fReservedRef)); + descendantCount += node.fPageObjectDescendantCount; + } + auto next = SkPDFMakeDict("Pages"); + next->insertInt("Count", descendantCount); + next->insertObject("Kids", std::move(kids_list)); + result.push_back(PageTreeNode{std::move(next), parent, descendantCount}); + } + return result; + } + }; + std::vector currentLayer; + currentLayer.reserve(pages.size()); + SkASSERT(pages.size() == pageRefs.size()); + for (size_t i = 0; i < pages.size(); ++i) { + currentLayer.push_back(PageTreeNode{std::move(pages[i]), pageRefs[i], 1}); + } + currentLayer = PageTreeNode::Layer(std::move(currentLayer), doc); + while (currentLayer.size() > 1) { + currentLayer = PageTreeNode::Layer(std::move(currentLayer), doc); + } + SkASSERT(currentLayer.size() == 1); + const PageTreeNode& root = currentLayer[0]; + return doc->emit(*root.fNode, root.fReservedRef); +} + +template +static void reset_object(T* dst, Args&&... args) { + dst->~T(); + new (dst) T(std::forward(args)...); +} + +//////////////////////////////////////////////////////////////////////////////// + +SkPDFDocument::SkPDFDocument(SkWStream* stream, + SkPDF::Metadata metadata) + : SkDocument(stream) + , fMetadata(std::move(metadata)) { + constexpr float kDpiForRasterScaleOne = 72.0f; + if (fMetadata.fRasterDPI != kDpiForRasterScaleOne) { + fInverseRasterScale = kDpiForRasterScaleOne / fMetadata.fRasterDPI; + fRasterScale = fMetadata.fRasterDPI / kDpiForRasterScaleOne; + } + if (fMetadata.fStructureElementTreeRoot) { + fTagTree.init(fMetadata.fStructureElementTreeRoot); + } + fExecutor = fMetadata.fExecutor; +} + +SkPDFDocument::~SkPDFDocument() { + // subclasses of SkDocument must call close() in their destructors. + this->close(); +} + +SkPDFIndirectReference SkPDFDocument::emit(const SkPDFObject& object, SkPDFIndirectReference ref){ + SkAutoMutexExclusive lock(fMutex); + object.emitObject(this->beginObject(ref)); + this->endObject(); + return ref; +} + +SkWStream* SkPDFDocument::beginObject(SkPDFIndirectReference ref) SK_REQUIRES(fMutex) { + begin_indirect_object(&fOffsetMap, ref, this->getStream()); + return this->getStream(); +} + +void SkPDFDocument::endObject() SK_REQUIRES(fMutex) { + end_indirect_object(this->getStream()); +} + +static SkSize operator*(SkISize u, SkScalar s) { return SkSize{u.width() * s, u.height() * s}; } +static SkSize operator*(SkSize u, SkScalar s) { return SkSize{u.width() * s, u.height() * s}; } + +SkCanvas* SkPDFDocument::onBeginPage(SkScalar width, SkScalar height) { + SkASSERT(fCanvas.imageInfo().dimensions().isZero()); + if (fPages.empty()) { + // if this is the first page if the document. + { + SkAutoMutexExclusive autoMutexAcquire(fMutex); + serializeHeader(&fOffsetMap, this->getStream()); + + } + + fInfoDict = this->emit(*SkPDFMetadata::MakeDocumentInformationDict(fMetadata)); + if (fMetadata.fPDFA) { + fUUID = SkPDFMetadata::CreateUUID(fMetadata); + // We use the same UUID for Document ID and Instance ID since this + // is the first revision of this document (and Skia does not + // support revising existing PDF documents). + // If we are not in PDF/A mode, don't use a UUID since testing + // works best with reproducible outputs. + fXMP = SkPDFMetadata::MakeXMPObject(fMetadata, fUUID, fUUID, this); + } + } + // By scaling the page at the device level, we will create bitmap layer + // devices at the rasterized scale, not the 72dpi scale. Bitmap layer + // devices are created when saveLayer is called with an ImageFilter; see + // SkPDFDevice::onCreateDevice(). + SkISize pageSize = (SkSize{width, height} * fRasterScale).toRound(); + SkMatrix initialTransform; + // Skia uses the top left as the origin but PDF natively has the origin at the + // bottom left. This matrix corrects for that, as well as the raster scale. + initialTransform.setScaleTranslate(fInverseRasterScale, -fInverseRasterScale, + 0, fInverseRasterScale * pageSize.height()); + fPageDevice = sk_make_sp(pageSize, this, initialTransform); + reset_object(&fCanvas, fPageDevice); + fCanvas.scale(fRasterScale, fRasterScale); + fPageRefs.push_back(this->reserveRef()); + return &fCanvas; +} + +static void populate_link_annotation(SkPDFDict* annotation, const SkRect& r) { + annotation->insertName("Subtype", "Link"); + annotation->insertInt("F", 4); // required by ISO 19005 + // Border: 0 = Horizontal corner radius. + // 0 = Vertical corner radius. + // 0 = Width, 0 = no border. + annotation->insertObject("Border", SkPDFMakeArray(0, 0, 0)); + annotation->insertObject("Rect", SkPDFMakeArray(r.fLeft, r.fTop, r.fRight, r.fBottom)); +} + +static SkPDFIndirectReference append_destinations( + SkPDFDocument* doc, + const std::vector& namedDestinations) +{ + SkPDFDict destinations; + for (const SkPDFNamedDestination& dest : namedDestinations) { + auto pdfDest = SkPDFMakeArray(); + pdfDest->reserve(5); + pdfDest->appendRef(dest.fPage); + pdfDest->appendName("XYZ"); + pdfDest->appendScalar(dest.fPoint.x()); + pdfDest->appendScalar(dest.fPoint.y()); + pdfDest->appendInt(0); // Leave zoom unchanged + destinations.insertObject(ToValidUtf8String(*dest.fName), std::move(pdfDest)); + } + return doc->emit(destinations); +} + +std::unique_ptr SkPDFDocument::getAnnotations() { + std::unique_ptr array; + size_t count = fCurrentPageLinks.size(); + if (0 == count) { + return array; // is nullptr + } + array = SkPDFMakeArray(); + array->reserve(count); + for (const auto& link : fCurrentPageLinks) { + SkPDFDict annotation("Annot"); + populate_link_annotation(&annotation, link->fRect); + if (link->fType == SkPDFLink::Type::kUrl) { + std::unique_ptr action = SkPDFMakeDict("Action"); + action->insertName("S", "URI"); + // This is documented to be a 7 bit ASCII (byte) string. + action->insertByteString("URI", ToValidUtf8String(*link->fData)); + annotation.insertObject("A", std::move(action)); + } else if (link->fType == SkPDFLink::Type::kNamedDestination) { + annotation.insertName("Dest", ToValidUtf8String(*link->fData)); + } else { + SkDEBUGFAIL("Unknown link type."); + } + + if (link->fNodeId) { + int structParentKey = createStructParentKeyForNodeId(link->fNodeId); + if (structParentKey != -1) { + annotation.insertInt("StructParent", structParentKey); + } + } + + SkPDFIndirectReference annotationRef = emit(annotation); + array->appendRef(annotationRef); + if (link->fNodeId) { + fTagTree.addNodeAnnotation(link->fNodeId, annotationRef, SkToUInt(this->currentPageIndex())); + } + } + return array; +} + +void SkPDFDocument::onEndPage() { + SkASSERT(!fCanvas.imageInfo().dimensions().isZero()); + reset_object(&fCanvas); + SkASSERT(fPageDevice); + + auto page = SkPDFMakeDict("Page"); + + SkSize mediaSize = fPageDevice->imageInfo().dimensions() * fInverseRasterScale; + std::unique_ptr pageContent = fPageDevice->content(); + auto resourceDict = fPageDevice->makeResourceDict(); + SkASSERT(fPageRefs.size() > 0); + fPageDevice = nullptr; + + page->insertObject("Resources", std::move(resourceDict)); + page->insertObject("MediaBox", SkPDFUtils::RectToArray(SkRect::MakeSize(mediaSize))); + + if (std::unique_ptr annotations = getAnnotations()) { + page->insertObject("Annots", std::move(annotations)); + fCurrentPageLinks.clear(); + } + + page->insertRef("Contents", SkPDFStreamOut(nullptr, std::move(pageContent), this)); + // The StructParents unique identifier for each page is just its + // 0-based page index. + page->insertInt("StructParents", SkToInt(this->currentPageIndex())); + fPages.emplace_back(std::move(page)); +} + +void SkPDFDocument::onAbort() { + this->waitForJobs(); +} + +static sk_sp SkSrgbIcm() { + // Source: http://www.argyllcms.com/icclibsrc.html + static const char kProfile[] = + "\0\0\14\214argl\2 \0\0mntrRGB XYZ \7\336\0\1\0\6\0\26\0\17\0:acspM" + "SFT\0\0\0\0IEC sRGB\0\0\0\0\0\0\0\0\0\0\0\0\0\0\366\326\0\1\0\0\0\0" + "\323-argl\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0" + "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\21desc\0\0\1P\0\0\0\231cprt\0" + "\0\1\354\0\0\0gdmnd\0\0\2T\0\0\0pdmdd\0\0\2\304\0\0\0\210tech\0\0\3" + "L\0\0\0\14vued\0\0\3X\0\0\0gview\0\0\3\300\0\0\0$lumi\0\0\3\344\0\0" + "\0\24meas\0\0\3\370\0\0\0$wtpt\0\0\4\34\0\0\0\24bkpt\0\0\0040\0\0\0" + "\24rXYZ\0\0\4D\0\0\0\24gXYZ\0\0\4X\0\0\0\24bXYZ\0\0\4l\0\0\0\24rTR" + "C\0\0\4\200\0\0\10\14gTRC\0\0\4\200\0\0\10\14bTRC\0\0\4\200\0\0\10" + "\14desc\0\0\0\0\0\0\0?sRGB IEC61966-2.1 (Equivalent to www.srgb.co" + "m 1998 HP profile)\0\0\0\0\0\0\0\0\0\0\0?sRGB IEC61966-2.1 (Equiva" + "lent to www.srgb.com 1998 HP profile)\0\0\0\0\0\0\0\0text\0\0\0\0C" + "reated by Graeme W. 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"X\303\324\304Q\304\316\305K\305\310\306F\306\303\307A\307\277\310=" + "\310\274\311:\311\271\3128\312\267\3136\313\266\3145\314\265\3155\315" + "\265\3166\316\266\3177\317\270\3209\320\272\321<\321\276\322?\322\301" + "\323D\323\306\324I\324\313\325N\325\321\326U\326\330\327\\\327\340" + "\330d\330\350\331l\331\361\332v\332\373\333\200\334\5\334\212\335\20" + "\335\226\336\34\336\242\337)\337\257\3406\340\275\341D\341\314\342" + "S\342\333\343c\343\353\344s\344\374\345\204\346\r\346\226\347\37\347" + "\251\3502\350\274\351F\351\320\352[\352\345\353p\353\373\354\206\355" + "\21\355\234\356(\356\264\357@\357\314\360X\360\345\361r\361\377\362" + "\214\363\31\363\247\3644\364\302\365P\365\336\366m\366\373\367\212" + "\370\31\370\250\3718\371\307\372W\372\347\373w\374\7\374\230\375)\375" + "\272\376K\376\334\377m\377\377"; + const size_t kProfileLength = 3212; + static_assert(kProfileLength == sizeof(kProfile) - 1, ""); + return SkData::MakeWithoutCopy(kProfile, kProfileLength); +} + +static SkPDFIndirectReference make_srgb_color_profile(SkPDFDocument* doc) { + std::unique_ptr dict = SkPDFMakeDict(); + dict->insertInt("N", 3); + dict->insertObject("Range", SkPDFMakeArray(0, 1, 0, 1, 0, 1)); + return SkPDFStreamOut(std::move(dict), SkMemoryStream::Make(SkSrgbIcm()), + doc, SkPDFSteamCompressionEnabled::Yes); +} + +static std::unique_ptr make_srgb_output_intents(SkPDFDocument* doc) { + // sRGB is specified by HTML, CSS, and SVG. + auto outputIntent = SkPDFMakeDict("OutputIntent"); + outputIntent->insertName("S", "GTS_PDFA1"); + outputIntent->insertTextString("RegistryName", "http://www.color.org"); + outputIntent->insertTextString("OutputConditionIdentifier", "Custom"); + outputIntent->insertTextString("Info", "sRGB IEC61966-2.1"); + outputIntent->insertRef("DestOutputProfile", make_srgb_color_profile(doc)); + auto intentArray = SkPDFMakeArray(); + intentArray->appendObject(std::move(outputIntent)); + return intentArray; +} + +SkPDFIndirectReference SkPDFDocument::getPage(size_t pageIndex) const { + SkASSERT(pageIndex < fPageRefs.size()); + return fPageRefs[pageIndex]; +} + +const SkMatrix& SkPDFDocument::currentPageTransform() const { + return fPageDevice->initialTransform(); +} + +int SkPDFDocument::createMarkIdForNodeId(int nodeId) { + return fTagTree.createMarkIdForNodeId(nodeId, SkToUInt(this->currentPageIndex())); +} + +int SkPDFDocument::createStructParentKeyForNodeId(int nodeId) { + return fTagTree.createStructParentKeyForNodeId(nodeId, SkToUInt(this->currentPageIndex())); +} + +static std::vector get_fonts(const SkPDFDocument& canon) { + std::vector fonts; + fonts.reserve(canon.fFontMap.count()); + // Sort so the output PDF is reproducible. + for (const auto& [unused, font] : canon.fFontMap) { + fonts.push_back(&font); + } + std::sort(fonts.begin(), fonts.end(), [](const SkPDFFont* u, const SkPDFFont* v) { + return u->indirectReference().fValue < v->indirectReference().fValue; + }); + return fonts; +} + +SkString SkPDFDocument::nextFontSubsetTag() { + // PDF 32000-1:2008 Section 9.6.4 FontSubsets "The tag shall consist of six uppercase letters" + // "followed by a plus sign" "different subsets in the same PDF file shall have different tags." + // There are 26^6 or 308,915,776 possible values. So start in range then increment and mod. + uint32_t thisFontSubsetTag = fNextFontSubsetTag; + fNextFontSubsetTag = (fNextFontSubsetTag + 1u) % 308915776u; + + SkString subsetTag(7); + char* subsetTagData = subsetTag.data(); + for (size_t i = 0; i < 6; ++i) { + subsetTagData[i] = 'A' + (thisFontSubsetTag % 26); + thisFontSubsetTag /= 26; + } + subsetTagData[6] = '+'; + return subsetTag; +} + +void SkPDFDocument::onClose(SkWStream* stream) { + SkASSERT(fCanvas.imageInfo().dimensions().isZero()); + if (fPages.empty()) { + this->waitForJobs(); + return; + } + auto docCatalog = SkPDFMakeDict("Catalog"); + if (fMetadata.fPDFA) { + SkASSERT(fXMP != SkPDFIndirectReference()); + docCatalog->insertRef("Metadata", fXMP); + // Don't specify OutputIntents if we are not in PDF/A mode since + // no one has ever asked for this feature. + docCatalog->insertObject("OutputIntents", make_srgb_output_intents(this)); + } + + docCatalog->insertRef("Pages", generate_page_tree(this, std::move(fPages), fPageRefs)); + + if (!fNamedDestinations.empty()) { + docCatalog->insertRef("Dests", append_destinations(this, fNamedDestinations)); + fNamedDestinations.clear(); + } + + // Handle tagged PDFs. + if (SkPDFIndirectReference root = fTagTree.makeStructTreeRoot(this)) { + // In the document catalog, indicate that this PDF is tagged. + auto markInfo = SkPDFMakeDict("MarkInfo"); + markInfo->insertBool("Marked", true); + docCatalog->insertObject("MarkInfo", std::move(markInfo)); + docCatalog->insertRef("StructTreeRoot", root); + } + + auto docCatalogRef = this->emit(*docCatalog); + + for (const SkPDFFont* f : get_fonts(*this)) { + f->emitSubset(this); + } + + this->waitForJobs(); + { + SkAutoMutexExclusive autoMutexAcquire(fMutex); + serialize_footer(fOffsetMap, this->getStream(), fInfoDict, docCatalogRef, fUUID); + } +} + +void SkPDFDocument::incrementJobCount() { fJobCount++; } + +void SkPDFDocument::signalJobComplete() { fSemaphore.signal(); } + +void SkPDFDocument::waitForJobs() { + // fJobCount can increase while we wait. + while (fJobCount > 0) { + fSemaphore.wait(); + --fJobCount; + } +} + +/////////////////////////////////////////////////////////////////////////////// + +void SkPDF::SetNodeId(SkCanvas* canvas, int nodeID) { + sk_sp payload = SkData::MakeWithCopy(&nodeID, sizeof(nodeID)); + const char* key = SkPDFGetNodeIdKey(); + canvas->drawAnnotation({0, 0, 0, 0}, key, payload.get()); +} + +sk_sp SkPDF::MakeDocument(SkWStream* stream, const SkPDF::Metadata& metadata) { + SkPDF::Metadata meta = metadata; + if (meta.fRasterDPI <= 0) { + meta.fRasterDPI = 72.0f; + } + if (meta.fEncodingQuality < 0) { + meta.fEncodingQuality = 0; + } + return stream ? sk_make_sp(stream, std::move(meta)) : nullptr; +} diff --git a/gfx/skia/skia/src/pdf/SkPDFDocumentPriv.h b/gfx/skia/skia/src/pdf/SkPDFDocumentPriv.h new file mode 100644 index 0000000000..792c6c2208 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFDocumentPriv.h @@ -0,0 +1,190 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPDFDocumentPriv_DEFINED +#define SkPDFDocumentPriv_DEFINED + +#include "include/core/SkCanvas.h" +#include "include/core/SkStream.h" +#include "include/docs/SkPDFDocument.h" +#include "include/private/base/SkMutex.h" +#include "src/core/SkTHash.h" +#include "src/pdf/SkPDFMetadata.h" +#include "src/pdf/SkPDFTag.h" + +#include +#include +#include + +class SkExecutor; +class SkPDFDevice; +class SkPDFFont; +struct SkAdvancedTypefaceMetrics; +struct SkBitmapKey; +struct SkPDFFillGraphicState; +struct SkPDFImageShaderKey; +struct SkPDFStrokeGraphicState; + +namespace SkPDFGradientShader { +struct Key; +struct KeyHash; +} // namespace SkPDFGradientShader + +const char* SkPDFGetNodeIdKey(); + +// Logically part of SkPDFDocument, but separate to keep similar functionality together. +class SkPDFOffsetMap { +public: + void markStartOfDocument(const SkWStream*); + void markStartOfObject(int referenceNumber, const SkWStream*); + int objectCount() const; + int emitCrossReferenceTable(SkWStream* s) const; +private: + std::vector fOffsets; + size_t fBaseOffset = SIZE_MAX; +}; + + +struct SkPDFNamedDestination { + sk_sp fName; + SkPoint fPoint; + SkPDFIndirectReference fPage; +}; + + +struct SkPDFLink { + enum class Type { + kNone, + kUrl, + kNamedDestination, + }; + + SkPDFLink(Type type, SkData* data, const SkRect& rect, int nodeId) + : fType(type) + , fData(sk_ref_sp(data)) + , fRect(rect) + , fNodeId(nodeId) {} + const Type fType; + // The url or named destination, depending on |fType|. + const sk_sp fData; + const SkRect fRect; + const int fNodeId; +}; + + +/** Concrete implementation of SkDocument that creates PDF files. This + class does not produced linearized or optimized PDFs; instead it + it attempts to use a minimum amount of RAM. */ +class SkPDFDocument : public SkDocument { +public: + SkPDFDocument(SkWStream*, SkPDF::Metadata); + ~SkPDFDocument() override; + SkCanvas* onBeginPage(SkScalar, SkScalar) override; + void onEndPage() override; + void onClose(SkWStream*) override; + void onAbort() override; + + /** + Serialize the object, as well as any other objects it + indirectly refers to. If any any other objects have been added + to the SkPDFObjNumMap without serializing them, they will be + serialized as well. + + It might go without saying that objects should not be changed + after calling serialize, since those changes will be too late. + */ + SkPDFIndirectReference emit(const SkPDFObject&, SkPDFIndirectReference); + SkPDFIndirectReference emit(const SkPDFObject& o) { return this->emit(o, this->reserveRef()); } + + template + void emitStream(const SkPDFDict& dict, T writeStream, SkPDFIndirectReference ref) { + SkAutoMutexExclusive lock(fMutex); + SkWStream* stream = this->beginObject(ref); + dict.emitObject(stream); + stream->writeText(" stream\n"); + writeStream(stream); + stream->writeText("\nendstream"); + this->endObject(); + } + + const SkPDF::Metadata& metadata() const { return fMetadata; } + + SkPDFIndirectReference getPage(size_t pageIndex) const; + SkPDFIndirectReference currentPage() const { + return SkASSERT(!fPageRefs.empty()), fPageRefs.back(); + } + // Used to allow marked content to refer to its corresponding structure + // tree node, via a page entry in the parent tree. Returns -1 if no + // mark ID. + int createMarkIdForNodeId(int nodeId); + // Used to allow annotations to refer to their corresponding structure + // tree node, via the struct parent tree. Returns -1 if no struct parent + // key. + int createStructParentKeyForNodeId(int nodeId); + + std::unique_ptr getAnnotations(); + + SkPDFIndirectReference reserveRef() { return SkPDFIndirectReference{fNextObjectNumber++}; } + + // Returns a tag to prepend to a PostScript name of a subset font. Includes the '+'. + SkString nextFontSubsetTag(); + + SkExecutor* executor() const { return fExecutor; } + void incrementJobCount(); + void signalJobComplete(); + size_t currentPageIndex() { return fPages.size(); } + size_t pageCount() { return fPageRefs.size(); } + + const SkMatrix& currentPageTransform() const; + + // Canonicalized objects + SkTHashMap fImageShaderMap; + SkTHashMap + fGradientPatternMap; + SkTHashMap fPDFBitmapMap; + SkTHashMap> fTypefaceMetrics; + SkTHashMap> fType1GlyphNames; + SkTHashMap> fToUnicodeMap; + SkTHashMap fFontDescriptors; + SkTHashMap fType3FontDescriptors; + SkTHashMap fFontMap; + SkTHashMap fStrokeGSMap; + SkTHashMap fFillGSMap; + SkPDFIndirectReference fInvertFunction; + SkPDFIndirectReference fNoSmaskGraphicState; + std::vector> fCurrentPageLinks; + std::vector fNamedDestinations; + +private: + SkPDFOffsetMap fOffsetMap; + SkCanvas fCanvas; + std::vector> fPages; + std::vector fPageRefs; + + sk_sp fPageDevice; + std::atomic fNextObjectNumber = {1}; + std::atomic fJobCount = {0}; + uint32_t fNextFontSubsetTag = {0}; + SkUUID fUUID; + SkPDFIndirectReference fInfoDict; + SkPDFIndirectReference fXMP; + SkPDF::Metadata fMetadata; + SkScalar fRasterScale = 1; + SkScalar fInverseRasterScale = 1; + SkExecutor* fExecutor = nullptr; + + // For tagged PDFs. + SkPDFTagTree fTagTree; + + SkMutex fMutex; + SkSemaphore fSemaphore; + + void waitForJobs(); + SkWStream* beginObject(SkPDFIndirectReference); + void endObject(); +}; + +#endif // SkPDFDocumentPriv_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFFont.cpp b/gfx/skia/skia/src/pdf/SkPDFFont.cpp new file mode 100644 index 0000000000..964c9aeb23 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFFont.cpp @@ -0,0 +1,724 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkData.h" +#include "include/core/SkFont.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkFontTypes.h" +#include "include/core/SkImage.h" +#include "include/core/SkImageInfo.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkSurfaceProps.h" +#include "include/core/SkTypes.h" +#include "include/docs/SkPDFDocument.h" +#include "include/private/SkBitmaskEnum.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkUTF.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkMask.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeSpec.h" +#include "src/core/SkTHash.h" +#include "src/pdf/SkPDFBitmap.h" +#include "src/pdf/SkPDFDevice.h" +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFFont.h" +#include "src/pdf/SkPDFFormXObject.h" +#include "src/pdf/SkPDFMakeCIDGlyphWidthsArray.h" +#include "src/pdf/SkPDFMakeToUnicodeCmap.h" +#include "src/pdf/SkPDFSubsetFont.h" +#include "src/pdf/SkPDFType1Font.h" +#include "src/pdf/SkPDFUtils.h" + +#include +#include +#include +#include + +void SkPDFFont::GetType1GlyphNames(const SkTypeface& face, SkString* dst) { + face.getPostScriptGlyphNames(dst); +} + +namespace { +// PDF's notion of symbolic vs non-symbolic is related to the character set, not +// symbols vs. characters. Rarely is a font the right character set to call it +// non-symbolic, so always call it symbolic. (PDF 1.4 spec, section 5.7.1) +static const int32_t kPdfSymbolic = 4; +static const SkFontTableTag kCOLRTableTag = SkSetFourByteTag('C', 'O', 'L', 'R'); + +// scale from em-units to base-1000, returning as a SkScalar +inline SkScalar from_font_units(SkScalar scaled, uint16_t emSize) { + return emSize == 1000 ? scaled : scaled * 1000 / emSize; +} + +inline SkScalar scaleFromFontUnits(int16_t val, uint16_t emSize) { + return from_font_units(SkIntToScalar(val), emSize); +} + +void setGlyphWidthAndBoundingBox(SkScalar width, SkIRect box, + SkDynamicMemoryWStream* content) { + // Specify width and bounding box for the glyph. + SkPDFUtils::AppendScalar(width, content); + content->writeText(" 0 "); + content->writeDecAsText(box.fLeft); + content->writeText(" "); + content->writeDecAsText(box.fTop); + content->writeText(" "); + content->writeDecAsText(box.fRight); + content->writeText(" "); + content->writeDecAsText(box.fBottom); + content->writeText(" d1\n"); +} +} // namespace + +/////////////////////////////////////////////////////////////////////////////// +// class SkPDFFont +/////////////////////////////////////////////////////////////////////////////// + +/* Resources are canonicalized and uniqueified by pointer so there has to be + * some additional state indicating which subset of the font is used. It + * must be maintained at the document granularity. + */ + +SkPDFFont::~SkPDFFont() = default; + +SkPDFFont::SkPDFFont(SkPDFFont&&) = default; + +SkPDFFont& SkPDFFont::operator=(SkPDFFont&&) = default; + +static bool can_embed(const SkAdvancedTypefaceMetrics& metrics) { + return !SkToBool(metrics.fFlags & SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag); +} + +const SkAdvancedTypefaceMetrics* SkPDFFont::GetMetrics(const SkTypeface* typeface, + SkPDFDocument* canon) { + SkASSERT(typeface); + SkTypefaceID id = typeface->uniqueID(); + if (std::unique_ptr* ptr = canon->fTypefaceMetrics.find(id)) { + return ptr->get(); // canon retains ownership. + } + int count = typeface->countGlyphs(); + if (count <= 0 || count > 1 + SkTo(UINT16_MAX)) { + // Cache nullptr to skip this check. Use SkSafeUnref(). + canon->fTypefaceMetrics.set(id, nullptr); + return nullptr; + } + std::unique_ptr metrics = typeface->getAdvancedMetrics(); + if (!metrics) { + metrics = std::make_unique(); + } + + if (0 == metrics->fStemV || 0 == metrics->fCapHeight) { + SkFont font; + font.setHinting(SkFontHinting::kNone); + font.setTypeface(sk_ref_sp(typeface)); + font.setSize(1000); // glyph coordinate system + if (0 == metrics->fStemV) { + // Figure out a good guess for StemV - Min width of i, I, !, 1. + // This probably isn't very good with an italic font. + int16_t stemV = SHRT_MAX; + for (char c : {'i', 'I', '!', '1'}) { + uint16_t g = font.unicharToGlyph(c); + SkRect bounds; + font.getBounds(&g, 1, &bounds, nullptr); + stemV = std::min(stemV, SkToS16(SkScalarRoundToInt(bounds.width()))); + } + metrics->fStemV = stemV; + } + if (0 == metrics->fCapHeight) { + // Figure out a good guess for CapHeight: average the height of M and X. + SkScalar capHeight = 0; + for (char c : {'M', 'X'}) { + uint16_t g = font.unicharToGlyph(c); + SkRect bounds; + font.getBounds(&g, 1, &bounds, nullptr); + capHeight += bounds.height(); + } + metrics->fCapHeight = SkToS16(SkScalarRoundToInt(capHeight / 2)); + } + } + // Fonts are always subset, so always prepend the subset tag. + metrics->fPostScriptName.prepend(canon->nextFontSubsetTag()); + return canon->fTypefaceMetrics.set(id, std::move(metrics))->get(); +} + +const std::vector& SkPDFFont::GetUnicodeMap(const SkTypeface* typeface, + SkPDFDocument* canon) { + SkASSERT(typeface); + SkASSERT(canon); + SkTypefaceID id = typeface->uniqueID(); + if (std::vector* ptr = canon->fToUnicodeMap.find(id)) { + return *ptr; + } + std::vector buffer(typeface->countGlyphs()); + typeface->getGlyphToUnicodeMap(buffer.data()); + return *canon->fToUnicodeMap.set(id, std::move(buffer)); +} + +SkAdvancedTypefaceMetrics::FontType SkPDFFont::FontType(const SkTypeface& typeface, + const SkAdvancedTypefaceMetrics& metrics) { + if (SkToBool(metrics.fFlags & SkAdvancedTypefaceMetrics::kVariable_FontFlag) || + // PDF is actually interested in the encoding of the data, not just the logical format. + // If the TrueType is actually wOFF or wOF2 then it should not be directly embedded in PDF. + // For now export these as Type3 until the subsetter can handle table based fonts. + // See https://github.com/harfbuzz/harfbuzz/issues/3609 and + // https://skia-review.googlesource.com/c/skia/+/543485 + SkToBool(metrics.fFlags & SkAdvancedTypefaceMetrics::kAltDataFormat_FontFlag) || + SkToBool(metrics.fFlags & SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag)) { + // force Type3 fallback. + return SkAdvancedTypefaceMetrics::kOther_Font; + } + if (typeface.getTableSize(kCOLRTableTag)) { + // https://bugs.chromium.org/p/skia/issues/detail?id=12650 + // Don't embed COLRv0 / COLRv1 fonts, fall back to bitmaps. + return SkAdvancedTypefaceMetrics::kOther_Font; + } + return metrics.fType; +} + +static SkGlyphID first_nonzero_glyph_for_single_byte_encoding(SkGlyphID gid) { + return gid != 0 ? gid - (gid - 1) % 255 : 1; +} + +SkPDFFont* SkPDFFont::GetFontResource(SkPDFDocument* doc, + const SkGlyph* glyph, + SkTypeface* face) { + SkASSERT(doc); + SkASSERT(face); // All SkPDFDevice::internalDrawText ensures this. + const SkAdvancedTypefaceMetrics* fontMetrics = SkPDFFont::GetMetrics(face, doc); + SkASSERT(fontMetrics); // SkPDFDevice::internalDrawText ensures the typeface is good. + // GetMetrics only returns null to signify a bad typeface. + const SkAdvancedTypefaceMetrics& metrics = *fontMetrics; + SkAdvancedTypefaceMetrics::FontType type = SkPDFFont::FontType(*face, metrics); + if (!(glyph->isEmpty() || glyph->path())) { + type = SkAdvancedTypefaceMetrics::kOther_Font; + } + bool multibyte = SkPDFFont::IsMultiByte(type); + SkGlyphID subsetCode = + multibyte ? 0 : first_nonzero_glyph_for_single_byte_encoding(glyph->getGlyphID()); + uint64_t typefaceID = (static_cast(SkTypeface::UniqueID(face)) << 16) | subsetCode; + + if (SkPDFFont* found = doc->fFontMap.find(typefaceID)) { + SkASSERT(multibyte == found->multiByteGlyphs()); + return found; + } + + sk_sp typeface(sk_ref_sp(face)); + SkASSERT(typeface); + + SkGlyphID lastGlyph = SkToU16(typeface->countGlyphs() - 1); + + // should be caught by SkPDFDevice::internalDrawText + SkASSERT(glyph->getGlyphID() <= lastGlyph); + + SkGlyphID firstNonZeroGlyph; + if (multibyte) { + firstNonZeroGlyph = 1; + } else { + firstNonZeroGlyph = subsetCode; + lastGlyph = SkToU16(std::min((int)lastGlyph, 254 + (int)subsetCode)); + } + auto ref = doc->reserveRef(); + return doc->fFontMap.set( + typefaceID, SkPDFFont(std::move(typeface), firstNonZeroGlyph, lastGlyph, type, ref)); +} + +SkPDFFont::SkPDFFont(sk_sp typeface, + SkGlyphID firstGlyphID, + SkGlyphID lastGlyphID, + SkAdvancedTypefaceMetrics::FontType fontType, + SkPDFIndirectReference indirectReference) + : fTypeface(std::move(typeface)) + , fGlyphUsage(firstGlyphID, lastGlyphID) + , fIndirectReference(indirectReference) + , fFontType(fontType) +{ + // Always include glyph 0 + this->noteGlyphUsage(0); +} + +void SkPDFFont::PopulateCommonFontDescriptor(SkPDFDict* descriptor, + const SkAdvancedTypefaceMetrics& metrics, + uint16_t emSize, + int16_t defaultWidth) { + descriptor->insertName("FontName", metrics.fPostScriptName); + descriptor->insertInt("Flags", (size_t)(metrics.fStyle | kPdfSymbolic)); + descriptor->insertScalar("Ascent", + scaleFromFontUnits(metrics.fAscent, emSize)); + descriptor->insertScalar("Descent", + scaleFromFontUnits(metrics.fDescent, emSize)); + descriptor->insertScalar("StemV", + scaleFromFontUnits(metrics.fStemV, emSize)); + descriptor->insertScalar("CapHeight", + scaleFromFontUnits(metrics.fCapHeight, emSize)); + descriptor->insertInt("ItalicAngle", metrics.fItalicAngle); + descriptor->insertObject("FontBBox", + SkPDFMakeArray(scaleFromFontUnits(metrics.fBBox.left(), emSize), + scaleFromFontUnits(metrics.fBBox.bottom(), emSize), + scaleFromFontUnits(metrics.fBBox.right(), emSize), + scaleFromFontUnits(metrics.fBBox.top(), emSize))); + if (defaultWidth > 0) { + descriptor->insertScalar("MissingWidth", + scaleFromFontUnits(defaultWidth, emSize)); + } +} + +/////////////////////////////////////////////////////////////////////////////// +// Type0Font +/////////////////////////////////////////////////////////////////////////////// + +// if possible, make no copy. +static sk_sp stream_to_data(std::unique_ptr stream) { + SkASSERT(stream); + (void)stream->rewind(); + SkASSERT(stream->hasLength()); + size_t size = stream->getLength(); + if (const void* base = stream->getMemoryBase()) { + SkData::ReleaseProc proc = + [](const void*, void* ctx) { delete (SkStreamAsset*)ctx; }; + return SkData::MakeWithProc(base, size, proc, stream.release()); + } + return SkData::MakeFromStream(stream.get(), size); +} + +static void emit_subset_type0(const SkPDFFont& font, SkPDFDocument* doc) { + const SkAdvancedTypefaceMetrics* metricsPtr = + SkPDFFont::GetMetrics(font.typeface(), doc); + SkASSERT(metricsPtr); + if (!metricsPtr) { return; } + const SkAdvancedTypefaceMetrics& metrics = *metricsPtr; + SkASSERT(can_embed(metrics)); + SkAdvancedTypefaceMetrics::FontType type = font.getType(); + SkTypeface* face = font.typeface(); + SkASSERT(face); + + auto descriptor = SkPDFMakeDict("FontDescriptor"); + uint16_t emSize = SkToU16(font.typeface()->getUnitsPerEm()); + SkPDFFont::PopulateCommonFontDescriptor(descriptor.get(), metrics, emSize, 0); + + int ttcIndex; + std::unique_ptr fontAsset = face->openStream(&ttcIndex); + size_t fontSize = fontAsset ? fontAsset->getLength() : 0; + if (0 == fontSize) { + SkDebugf("Error: (SkTypeface)(%p)::openStream() returned " + "empty stream (%p) when identified as kType1CID_Font " + "or kTrueType_Font.\n", face, fontAsset.get()); + } else { + switch (type) { + case SkAdvancedTypefaceMetrics::kTrueType_Font: { + if (!SkToBool(metrics.fFlags & + SkAdvancedTypefaceMetrics::kNotSubsettable_FontFlag)) { + SkASSERT(font.firstGlyphID() == 1); + sk_sp subsetFontData = SkPDFSubsetFont( + stream_to_data(std::move(fontAsset)), font.glyphUsage(), + doc->metadata().fSubsetter, + metrics.fFontName.c_str(), ttcIndex); + if (subsetFontData) { + std::unique_ptr tmp = SkPDFMakeDict(); + tmp->insertInt("Length1", SkToInt(subsetFontData->size())); + descriptor->insertRef( + "FontFile2", + SkPDFStreamOut(std::move(tmp), + SkMemoryStream::Make(std::move(subsetFontData)), + doc, SkPDFSteamCompressionEnabled::Yes)); + break; + } + // If subsetting fails, fall back to original font data. + fontAsset = face->openStream(&ttcIndex); + SkASSERT(fontAsset); + SkASSERT(fontAsset->getLength() == fontSize); + if (!fontAsset || fontAsset->getLength() == 0) { break; } + } + std::unique_ptr tmp = SkPDFMakeDict(); + tmp->insertInt("Length1", fontSize); + descriptor->insertRef("FontFile2", + SkPDFStreamOut(std::move(tmp), std::move(fontAsset), + doc, SkPDFSteamCompressionEnabled::Yes)); + break; + } + case SkAdvancedTypefaceMetrics::kType1CID_Font: { + std::unique_ptr tmp = SkPDFMakeDict(); + tmp->insertName("Subtype", "CIDFontType0C"); + descriptor->insertRef("FontFile3", + SkPDFStreamOut(std::move(tmp), std::move(fontAsset), + doc, SkPDFSteamCompressionEnabled::Yes)); + break; + } + default: + SkASSERT(false); + } + } + + auto newCIDFont = SkPDFMakeDict("Font"); + newCIDFont->insertRef("FontDescriptor", doc->emit(*descriptor)); + newCIDFont->insertName("BaseFont", metrics.fPostScriptName); + + switch (type) { + case SkAdvancedTypefaceMetrics::kType1CID_Font: + newCIDFont->insertName("Subtype", "CIDFontType0"); + break; + case SkAdvancedTypefaceMetrics::kTrueType_Font: + newCIDFont->insertName("Subtype", "CIDFontType2"); + newCIDFont->insertName("CIDToGIDMap", "Identity"); + break; + default: + SkASSERT(false); + } + auto sysInfo = SkPDFMakeDict(); + // These are actually ASCII strings. + sysInfo->insertByteString("Registry", "Adobe"); + sysInfo->insertByteString("Ordering", "Identity"); + sysInfo->insertInt("Supplement", 0); + newCIDFont->insertObject("CIDSystemInfo", std::move(sysInfo)); + + SkScalar defaultWidth = 0; + { + std::unique_ptr widths = SkPDFMakeCIDGlyphWidthsArray( + *face, font.glyphUsage(), &defaultWidth); + if (widths && widths->size() > 0) { + newCIDFont->insertObject("W", std::move(widths)); + } + newCIDFont->insertScalar("DW", defaultWidth); + } + + //////////////////////////////////////////////////////////////////////////// + + SkPDFDict fontDict("Font"); + fontDict.insertName("Subtype", "Type0"); + fontDict.insertName("BaseFont", metrics.fPostScriptName); + fontDict.insertName("Encoding", "Identity-H"); + auto descendantFonts = SkPDFMakeArray(); + descendantFonts->appendRef(doc->emit(*newCIDFont)); + fontDict.insertObject("DescendantFonts", std::move(descendantFonts)); + + const std::vector& glyphToUnicode = + SkPDFFont::GetUnicodeMap(font.typeface(), doc); + SkASSERT(SkToSizeT(font.typeface()->countGlyphs()) == glyphToUnicode.size()); + std::unique_ptr toUnicode = + SkPDFMakeToUnicodeCmap(glyphToUnicode.data(), + &font.glyphUsage(), + font.multiByteGlyphs(), + font.firstGlyphID(), + font.lastGlyphID()); + fontDict.insertRef("ToUnicode", SkPDFStreamOut(nullptr, std::move(toUnicode), doc)); + + doc->emit(fontDict, font.indirectReference()); +} + +/////////////////////////////////////////////////////////////////////////////// +// PDFType3Font +/////////////////////////////////////////////////////////////////////////////// + +namespace { +// returns [0, first, first+1, ... last-1, last] +struct SingleByteGlyphIdIterator { + SingleByteGlyphIdIterator(SkGlyphID first, SkGlyphID last) + : fFirst(first), fLast(last) { + SkASSERT(fFirst > 0); + SkASSERT(fLast >= first); + } + struct Iter { + void operator++() { + fCurrent = (0 == fCurrent) ? fFirst : fCurrent + 1; + } + // This is an input_iterator + SkGlyphID operator*() const { return (SkGlyphID)fCurrent; } + bool operator!=(const Iter& rhs) const { + return fCurrent != rhs.fCurrent; + } + Iter(SkGlyphID f, int c) : fFirst(f), fCurrent(c) {} + private: + const SkGlyphID fFirst; + int fCurrent; // must be int to make fLast+1 to fit + }; + Iter begin() const { return Iter(fFirst, 0); } + Iter end() const { return Iter(fFirst, (int)fLast + 1); } +private: + const SkGlyphID fFirst; + const SkGlyphID fLast; +}; +} // namespace + +struct ImageAndOffset { + sk_sp fImage; + SkIPoint fOffset; +}; +static ImageAndOffset to_image(SkGlyphID gid, SkBulkGlyphMetricsAndImages* smallGlyphs) { + const SkGlyph* glyph = smallGlyphs->glyph(SkPackedGlyphID{gid}); + SkMask mask = glyph->mask(); + if (!mask.fImage) { + return {nullptr, {0, 0}}; + } + SkIRect bounds = mask.fBounds; + SkBitmap bm; + switch (mask.fFormat) { + case SkMask::kBW_Format: + bm.allocPixels(SkImageInfo::MakeA8(bounds.width(), bounds.height())); + for (int y = 0; y < bm.height(); ++y) { + for (int x8 = 0; x8 < bm.width(); x8 += 8) { + uint8_t v = *mask.getAddr1(x8 + bounds.x(), y + bounds.y()); + int e = std::min(x8 + 8, bm.width()); + for (int x = x8; x < e; ++x) { + *bm.getAddr8(x, y) = (v >> (x & 0x7)) & 0x1 ? 0xFF : 0x00; + } + } + } + bm.setImmutable(); + return {bm.asImage(), {bounds.x(), bounds.y()}}; + case SkMask::kA8_Format: + bm.installPixels(SkImageInfo::MakeA8(bounds.width(), bounds.height()), + mask.fImage, mask.fRowBytes); + return {SkMakeImageFromRasterBitmap(bm, kAlways_SkCopyPixelsMode), + {bounds.x(), bounds.y()}}; + case SkMask::kARGB32_Format: + bm.installPixels(SkImageInfo::MakeN32Premul(bounds.width(), bounds.height()), + mask.fImage, mask.fRowBytes); + return {SkMakeImageFromRasterBitmap(bm, kAlways_SkCopyPixelsMode), + {bounds.x(), bounds.y()}}; + case SkMask::k3D_Format: + case SkMask::kLCD16_Format: + default: + SkASSERT(false); + return {nullptr, {0, 0}}; + } +} + +static SkPDFIndirectReference type3_descriptor(SkPDFDocument* doc, + const SkTypeface* typeface, + SkScalar xHeight) { + if (SkPDFIndirectReference* ptr = doc->fType3FontDescriptors.find(typeface->uniqueID())) { + return *ptr; + } + + SkPDFDict descriptor("FontDescriptor"); + int32_t fontDescriptorFlags = kPdfSymbolic; + if (const SkAdvancedTypefaceMetrics* metrics = SkPDFFont::GetMetrics(typeface, doc)) { + // Type3 FontDescriptor does not require all the same fields. + descriptor.insertName("FontName", metrics->fPostScriptName); + descriptor.insertInt("ItalicAngle", metrics->fItalicAngle); + fontDescriptorFlags |= (int32_t)metrics->fStyle; + // Adobe requests CapHeight, XHeight, and StemV be added + // to "greatly help our workflow downstream". + if (metrics->fCapHeight != 0) { descriptor.insertInt("CapHeight", metrics->fCapHeight); } + if (metrics->fStemV != 0) { descriptor.insertInt("StemV", metrics->fStemV); } + if (xHeight != 0) { + descriptor.insertScalar("XHeight", xHeight); + } + } + descriptor.insertInt("Flags", fontDescriptorFlags); + SkPDFIndirectReference ref = doc->emit(descriptor); + doc->fType3FontDescriptors.set(typeface->uniqueID(), ref); + return ref; +} + +#ifdef SK_PDF_BITMAP_GLYPH_RASTER_SIZE +static constexpr float kBitmapFontSize = SK_PDF_BITMAP_GLYPH_RASTER_SIZE; +#else +static constexpr float kBitmapFontSize = 64; +#endif + +SkStrikeSpec make_small_strike(const SkTypeface& typeface) { + SkFont font(sk_ref_sp(&typeface), kBitmapFontSize); + font.setHinting(SkFontHinting::kNone); + font.setEdging(SkFont::Edging::kAlias); + return SkStrikeSpec::MakeMask(font, + SkPaint(), + SkSurfaceProps(0, kUnknown_SkPixelGeometry), + SkScalerContextFlags::kFakeGammaAndBoostContrast, + SkMatrix::I()); +} + +static void emit_subset_type3(const SkPDFFont& pdfFont, SkPDFDocument* doc) { + SkTypeface* typeface = pdfFont.typeface(); + SkGlyphID firstGlyphID = pdfFont.firstGlyphID(); + SkGlyphID lastGlyphID = pdfFont.lastGlyphID(); + const SkPDFGlyphUse& subset = pdfFont.glyphUsage(); + SkASSERT(lastGlyphID >= firstGlyphID); + // Remove unused glyphs at the end of the range. + // Keep the lastGlyphID >= firstGlyphID invariant true. + while (lastGlyphID > firstGlyphID && !subset.has(lastGlyphID)) { + --lastGlyphID; + } + int unitsPerEm; + SkStrikeSpec strikeSpec = SkStrikeSpec::MakePDFVector(*typeface, &unitsPerEm); + auto strike = strikeSpec.findOrCreateStrike(); + SkASSERT(strike); + SkScalar emSize = (SkScalar)unitsPerEm; + SkScalar xHeight = strike->getFontMetrics().fXHeight; + SkBulkGlyphMetricsAndPaths metricsAndPaths((sk_sp(strike))); + SkBulkGlyphMetricsAndDrawables metricsAndDrawables(std::move(strike)); + + SkStrikeSpec strikeSpecSmall = kBitmapFontSize > 0 ? make_small_strike(*typeface) + : strikeSpec; + + SkBulkGlyphMetricsAndImages smallGlyphs(strikeSpecSmall); + float bitmapScale = kBitmapFontSize > 0 ? emSize / kBitmapFontSize : 1.0f; + + SkPDFDict font("Font"); + font.insertName("Subtype", "Type3"); + // Flip about the x-axis and scale by 1/emSize. + SkMatrix fontMatrix; + fontMatrix.setScale(SkScalarInvert(emSize), -SkScalarInvert(emSize)); + font.insertObject("FontMatrix", SkPDFUtils::MatrixToArray(fontMatrix)); + + auto charProcs = SkPDFMakeDict(); + auto encoding = SkPDFMakeDict("Encoding"); + + auto encDiffs = SkPDFMakeArray(); + // length(firstGlyphID .. lastGlyphID) == lastGlyphID - firstGlyphID + 1 + // plus 1 for glyph 0; + SkASSERT(firstGlyphID > 0); + SkASSERT(lastGlyphID >= firstGlyphID); + int glyphCount = lastGlyphID - firstGlyphID + 2; + // one other entry for the index of first glyph. + encDiffs->reserve(glyphCount + 1); + encDiffs->appendInt(0); // index of first glyph + + auto widthArray = SkPDFMakeArray(); + widthArray->reserve(glyphCount); + + SkIRect bbox = SkIRect::MakeEmpty(); + + std::vector> imageGlyphs; + for (SkGlyphID gID : SingleByteGlyphIdIterator(firstGlyphID, lastGlyphID)) { + bool skipGlyph = gID != 0 && !subset.has(gID); + SkString characterName; + SkScalar advance = 0.0f; + SkIRect glyphBBox; + if (skipGlyph) { + characterName.set("g0"); + } else { + characterName.printf("g%X", gID); + const SkGlyph* pathGlyph = metricsAndPaths.glyph(gID); + const SkGlyph* drawableGlyph = metricsAndDrawables.glyph(gID); + advance = pathGlyph->advanceX(); + glyphBBox = pathGlyph->iRect(); + bbox.join(glyphBBox); + const SkPath* path = pathGlyph->path(); + SkDrawable* drawable = drawableGlyph->drawable(); + SkDynamicMemoryWStream content; + if (drawable && !drawable->getBounds().isEmpty()) { + sk_sp glyphDevice = sk_make_sp(glyphBBox.size(), doc); + SkCanvas canvas(glyphDevice); + canvas.translate(-glyphBBox.fLeft, -glyphBBox.fTop); + canvas.drawDrawable(drawable); + SkPDFIndirectReference xobject = SkPDFMakeFormXObject( + doc, glyphDevice->content(), + SkPDFMakeArray(0, 0, glyphBBox.width(), glyphBBox.height()), + glyphDevice->makeResourceDict(), + SkMatrix::Translate(glyphBBox.fLeft, glyphBBox.fTop), nullptr); + imageGlyphs.emplace_back(gID, xobject); + SkPDFUtils::AppendScalar(drawableGlyph->advanceX(), &content); + content.writeText(" 0 d0\n1 0 0 1 0 0 cm\n/X"); + content.write(characterName.c_str(), characterName.size()); + content.writeText(" Do\n"); + } else if (path && !path->isEmpty()) { + setGlyphWidthAndBoundingBox(pathGlyph->advanceX(), glyphBBox, &content); + SkPDFUtils::EmitPath(*path, SkPaint::kFill_Style, &content); + SkPDFUtils::PaintPath(SkPaint::kFill_Style, path->getFillType(), &content); + } else { + auto pimg = to_image(gID, &smallGlyphs); + if (!pimg.fImage) { + setGlyphWidthAndBoundingBox(pathGlyph->advanceX(), glyphBBox, &content); + } else { + using SkPDFUtils::AppendScalar; + imageGlyphs.emplace_back(gID, SkPDFSerializeImage(pimg.fImage.get(), doc)); + AppendScalar(pathGlyph->advanceX(), &content); + content.writeText(" 0 d0\n"); + AppendScalar(pimg.fImage->width() * bitmapScale, &content); + content.writeText(" 0 0 "); + AppendScalar(-pimg.fImage->height() * bitmapScale, &content); + content.writeText(" "); + AppendScalar(pimg.fOffset.x() * bitmapScale, &content); + content.writeText(" "); + AppendScalar((pimg.fImage->height() + pimg.fOffset.y()) * bitmapScale, + &content); + content.writeText(" cm\n/X"); + content.write(characterName.c_str(), characterName.size()); + content.writeText(" Do\n"); + } + } + charProcs->insertRef(characterName, SkPDFStreamOut(nullptr, + content.detachAsStream(), doc)); + } + encDiffs->appendName(std::move(characterName)); + widthArray->appendScalar(advance); + } + + if (!imageGlyphs.empty()) { + auto d0 = SkPDFMakeDict(); + for (const auto& pair : imageGlyphs) { + d0->insertRef(SkStringPrintf("Xg%X", pair.first), pair.second); + } + auto d1 = SkPDFMakeDict(); + d1->insertObject("XObject", std::move(d0)); + font.insertObject("Resources", std::move(d1)); + } + + encoding->insertObject("Differences", std::move(encDiffs)); + font.insertInt("FirstChar", 0); + font.insertInt("LastChar", lastGlyphID - firstGlyphID + 1); + /* FontBBox: "A rectangle expressed in the glyph coordinate + system, specifying the font bounding box. This is the smallest + rectangle enclosing the shape that would result if all of the + glyphs of the font were placed with their origins coincident and + then filled." */ + font.insertObject("FontBBox", SkPDFMakeArray(bbox.left(), + bbox.bottom(), + bbox.right(), + bbox.top())); + + font.insertName("CIDToGIDMap", "Identity"); + + const std::vector& glyphToUnicode = SkPDFFont::GetUnicodeMap(typeface, doc); + SkASSERT(glyphToUnicode.size() == SkToSizeT(typeface->countGlyphs())); + auto toUnicodeCmap = SkPDFMakeToUnicodeCmap(glyphToUnicode.data(), + &subset, + false, + firstGlyphID, + lastGlyphID); + font.insertRef("ToUnicode", SkPDFStreamOut(nullptr, std::move(toUnicodeCmap), doc)); + font.insertRef("FontDescriptor", type3_descriptor(doc, typeface, xHeight)); + font.insertObject("Widths", std::move(widthArray)); + font.insertObject("Encoding", std::move(encoding)); + font.insertObject("CharProcs", std::move(charProcs)); + + doc->emit(font, pdfFont.indirectReference()); +} + +void SkPDFFont::emitSubset(SkPDFDocument* doc) const { + switch (fFontType) { + case SkAdvancedTypefaceMetrics::kType1CID_Font: + case SkAdvancedTypefaceMetrics::kTrueType_Font: + return emit_subset_type0(*this, doc); +#ifndef SK_PDF_DO_NOT_SUPPORT_TYPE_1_FONTS + case SkAdvancedTypefaceMetrics::kType1_Font: + return SkPDFEmitType1Font(*this, doc); +#endif + default: + return emit_subset_type3(*this, doc); + } +} + +//////////////////////////////////////////////////////////////////////////////// + +bool SkPDFFont::CanEmbedTypeface(SkTypeface* typeface, SkPDFDocument* doc) { + const SkAdvancedTypefaceMetrics* metrics = SkPDFFont::GetMetrics(typeface, doc); + return metrics && can_embed(*metrics); +} + diff --git a/gfx/skia/skia/src/pdf/SkPDFFont.h b/gfx/skia/skia/src/pdf/SkPDFFont.h new file mode 100644 index 0000000000..18cd483d0c --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFFont.h @@ -0,0 +1,141 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPDFFont_DEFINED +#define SkPDFFont_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkStrikeCache.h" +#include "src/pdf/SkPDFGlyphUse.h" +#include "src/pdf/SkPDFTypes.h" + +#include + +class SkPDFDocument; +class SkString; + +/** \class SkPDFFont + A PDF Object class representing a font. The font may have resources + attached to it in order to embed the font. SkPDFFonts are canonicalized + so that resource deduplication will only include one copy of a font. + This class uses the same pattern as SkPDFGraphicState, a static weak + reference to each instantiated class. +*/ +class SkPDFFont { +public: + ~SkPDFFont(); + SkPDFFont(SkPDFFont&&); + SkPDFFont& operator=(SkPDFFont&&); + + /** Returns the typeface represented by this class. Returns nullptr for the + * default typeface. + */ + SkTypeface* typeface() const { return fTypeface.get(); } + + /** Returns the font type represented in this font. For Type0 fonts, + * returns the type of the descendant font. + */ + SkAdvancedTypefaceMetrics::FontType getType() const { return fFontType; } + + static SkAdvancedTypefaceMetrics::FontType FontType(const SkTypeface&, + const SkAdvancedTypefaceMetrics&); + static void GetType1GlyphNames(const SkTypeface&, SkString*); + + static bool IsMultiByte(SkAdvancedTypefaceMetrics::FontType type) { + return type == SkAdvancedTypefaceMetrics::kType1CID_Font || + type == SkAdvancedTypefaceMetrics::kTrueType_Font; + } + + /** Returns true if this font encoding supports glyph IDs above 255. + */ + bool multiByteGlyphs() const { return SkPDFFont::IsMultiByte(this->getType()); } + + /** Return true if this font has an encoding for the passed glyph id. + */ + bool hasGlyph(SkGlyphID gid) { + return (gid >= this->firstGlyphID() && gid <= this->lastGlyphID()) || gid == 0; + } + + /** Convert the input glyph ID into the font encoding. */ + SkGlyphID glyphToPDFFontEncoding(SkGlyphID gid) const { + if (this->multiByteGlyphs() || gid == 0) { + return gid; + } + SkASSERT(gid >= this->firstGlyphID() && gid <= this->lastGlyphID()); + SkASSERT(this->firstGlyphID() > 0); + return gid - this->firstGlyphID() + 1; + } + + void noteGlyphUsage(SkGlyphID glyph) { + SkASSERT(this->hasGlyph(glyph)); + fGlyphUsage.set(glyph); + } + + SkPDFIndirectReference indirectReference() const { return fIndirectReference; } + + /** Get the font resource for the passed typeface and glyphID. The + * reference count of the object is incremented and it is the caller's + * responsibility to unreference it when done. This is needed to + * accommodate the weak reference pattern used when the returned object + * is new and has no other references. + * @param typeface The typeface to find, not nullptr. + * @param glyphID Specify which section of a large font is of interest. + */ + static SkPDFFont* GetFontResource(SkPDFDocument* doc, + const SkGlyph* glyphs, + SkTypeface* typeface); + + /** Gets SkAdvancedTypefaceMetrics, and caches the result. + * @param typeface can not be nullptr. + * @return nullptr only when typeface is bad. + */ + static const SkAdvancedTypefaceMetrics* GetMetrics(const SkTypeface* typeface, + SkPDFDocument* canon); + + static const std::vector& GetUnicodeMap(const SkTypeface* typeface, + SkPDFDocument* canon); + + static void PopulateCommonFontDescriptor(SkPDFDict* descriptor, + const SkAdvancedTypefaceMetrics&, + uint16_t emSize, + int16_t defaultWidth); + + void emitSubset(SkPDFDocument*) const; + + /** + * Return false iff the typeface has its NotEmbeddable flag set. + * typeface is not nullptr + */ + static bool CanEmbedTypeface(SkTypeface*, SkPDFDocument*); + + SkGlyphID firstGlyphID() const { return fGlyphUsage.firstNonZero(); } + SkGlyphID lastGlyphID() const { return fGlyphUsage.lastGlyph(); } + const SkPDFGlyphUse& glyphUsage() const { return fGlyphUsage; } + sk_sp refTypeface() const { return fTypeface; } + +private: + sk_sp fTypeface; + SkPDFGlyphUse fGlyphUsage; + SkPDFIndirectReference fIndirectReference; + SkAdvancedTypefaceMetrics::FontType fFontType; + + SkPDFFont(sk_sp, + SkGlyphID firstGlyphID, + SkGlyphID lastGlyphID, + SkAdvancedTypefaceMetrics::FontType fontType, + SkPDFIndirectReference indirectReference); + // The glyph IDs accessible with this font. For Type1 (non CID) fonts, + // this will be a subset if the font has more than 255 glyphs. + + SkPDFFont() = delete; + SkPDFFont(const SkPDFFont&) = delete; + SkPDFFont& operator=(const SkPDFFont&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFFormXObject.cpp b/gfx/skia/skia/src/pdf/SkPDFFormXObject.cpp new file mode 100644 index 0000000000..cc07e2a0fd --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFFormXObject.cpp @@ -0,0 +1,39 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#include "src/pdf/SkPDFFormXObject.h" +#include "src/pdf/SkPDFUtils.h" + +SkPDFIndirectReference SkPDFMakeFormXObject(SkPDFDocument* doc, + std::unique_ptr content, + std::unique_ptr mediaBox, + std::unique_ptr resourceDict, + const SkMatrix& inverseTransform, + const char* colorSpace) { + std::unique_ptr dict = SkPDFMakeDict(); + dict->insertName("Type", "XObject"); + dict->insertName("Subtype", "Form"); + if (!inverseTransform.isIdentity()) { + dict->insertObject("Matrix", SkPDFUtils::MatrixToArray(inverseTransform)); + } + dict->insertObject("Resources", std::move(resourceDict)); + dict->insertObject("BBox", std::move(mediaBox)); + + // Right now FormXObject is only used for saveLayer, which implies + // isolated blending. Do this conditionally if that changes. + // TODO(halcanary): Is this comment obsolete, since we use it for + // alpha masks? + auto group = SkPDFMakeDict("Group"); + group->insertName("S", "Transparency"); + if (colorSpace != nullptr) { + group->insertName("CS", colorSpace); + } + group->insertBool("I", true); // Isolated. + dict->insertObject("Group", std::move(group)); + return SkPDFStreamOut(std::move(dict), std::move(content), doc); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFFormXObject.h b/gfx/skia/skia/src/pdf/SkPDFFormXObject.h new file mode 100644 index 0000000000..b12c8b2ea7 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFFormXObject.h @@ -0,0 +1,28 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkPDFFormXObject_DEFINED +#define SkPDFFormXObject_DEFINED + +#include "src/pdf/SkPDFDevice.h" +#include "src/pdf/SkPDFTypes.h" + +class SkPDFDocument; + +/** A form XObject is a self contained description of a graphics + object. A form XObject is a page object with slightly different + syntax, that can be drawn into a page content stream, just like a + bitmap XObject can be drawn into a page content stream. +*/ +SkPDFIndirectReference SkPDFMakeFormXObject(SkPDFDocument* doc, + std::unique_ptr content, + std::unique_ptr mediaBox, + std::unique_ptr resourceDict, + const SkMatrix& inverseTransform, + const char* colorSpace); +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFGlyphUse.h b/gfx/skia/skia/src/pdf/SkPDFGlyphUse.h new file mode 100644 index 0000000000..fa7627ab51 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFGlyphUse.h @@ -0,0 +1,49 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkPDFGlyphUse_DEFINED +#define SkPDFGlyphUse_DEFINED + +#include "include/core/SkTypes.h" +#include "src/utils/SkBitSet.h" + +class SkPDFGlyphUse { +public: + SkPDFGlyphUse() : fBitSet(0) {} + SkPDFGlyphUse(SkGlyphID firstNonZero, SkGlyphID lastGlyph) + : fBitSet(lastGlyph - firstNonZero + 2) + , fFirstNonZero(firstNonZero) + , fLastGlyph(lastGlyph) { SkASSERT(firstNonZero >= 1); } + ~SkPDFGlyphUse() = default; + SkPDFGlyphUse(SkPDFGlyphUse&&) = default; + SkPDFGlyphUse& operator=(SkPDFGlyphUse&&) = default; + + SkGlyphID firstNonZero() const { return fFirstNonZero; } + SkGlyphID lastGlyph() const { return fLastGlyph; } + void set(SkGlyphID gid) { fBitSet.set(this->toCode(gid)); } + bool has(SkGlyphID gid) const { return fBitSet.test(this->toCode(gid)); } + + template + void getSetValues(FN f) const { + if (fFirstNonZero == 1) { + return fBitSet.forEachSetIndex(std::move(f)); + } + uint16_t offset = fFirstNonZero - 1; + fBitSet.forEachSetIndex([&f, offset](unsigned v) { f(v == 0 ? v : v + offset); }); + } + +private: + SkBitSet fBitSet; + SkGlyphID fFirstNonZero = 0; + SkGlyphID fLastGlyph = 0; + + uint16_t toCode(SkGlyphID gid) const { + if (gid == 0 || fFirstNonZero == 1) { + return gid; + } + SkASSERT(gid >= fFirstNonZero && gid <= fLastGlyph); + return gid - fFirstNonZero + 1; + } + SkPDFGlyphUse(const SkPDFGlyphUse&) = delete; + SkPDFGlyphUse& operator=(const SkPDFGlyphUse&) = delete; +}; +#endif // SkPDFGlyphUse_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFGradientShader.cpp b/gfx/skia/skia/src/pdf/SkPDFGradientShader.cpp new file mode 100644 index 0000000000..ffaaf06e46 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFGradientShader.cpp @@ -0,0 +1,1013 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFGradientShader.h" + +#include "include/docs/SkPDFDocument.h" +#include "src/core/SkOpts.h" +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFFormXObject.h" +#include "src/pdf/SkPDFGraphicState.h" +#include "src/pdf/SkPDFResourceDict.h" +#include "src/pdf/SkPDFTypes.h" +#include "src/pdf/SkPDFUtils.h" + +using namespace skia_private; + +static uint32_t hash(const SkShaderBase::GradientInfo& v) { + uint32_t buffer[] = { + (uint32_t)v.fColorCount, + SkOpts::hash(v.fColors, v.fColorCount * sizeof(SkColor)), + SkOpts::hash(v.fColorOffsets, v.fColorCount * sizeof(SkScalar)), + SkOpts::hash(v.fPoint, 2 * sizeof(SkPoint)), + SkOpts::hash(v.fRadius, 2 * sizeof(SkScalar)), + (uint32_t)v.fTileMode, + v.fGradientFlags, + }; + return SkOpts::hash(buffer, sizeof(buffer)); +} + +static uint32_t hash(const SkPDFGradientShader::Key& k) { + uint32_t buffer[] = { + (uint32_t)k.fType, + hash(k.fInfo), + SkOpts::hash(&k.fCanvasTransform, sizeof(SkMatrix)), + SkOpts::hash(&k.fShaderTransform, sizeof(SkMatrix)), + SkOpts::hash(&k.fBBox, sizeof(SkIRect)) + }; + return SkOpts::hash(buffer, sizeof(buffer)); +} + +static void unit_to_points_matrix(const SkPoint pts[2], SkMatrix* matrix) { + SkVector vec = pts[1] - pts[0]; + SkScalar mag = vec.length(); + SkScalar inv = mag ? SkScalarInvert(mag) : 0; + + vec.scale(inv); + matrix->setSinCos(vec.fY, vec.fX); + matrix->preScale(mag, mag); + matrix->postTranslate(pts[0].fX, pts[0].fY); +} + +static const int kColorComponents = 3; +typedef uint8_t ColorTuple[kColorComponents]; + +/* Assumes t - startOffset is on the stack and does a linear interpolation on t + between startOffset and endOffset from prevColor to curColor (for each color + component), leaving the result in component order on the stack. It assumes + there are always 3 components per color. + @param range endOffset - startOffset + @param beginColor The previous color. + @param endColor The current color. + @param result The result ps function. + */ +static void interpolate_color_code(SkScalar range, SkColor beginColor, SkColor endColor, + SkDynamicMemoryWStream* result) { + SkASSERT(range != SkIntToScalar(0)); + + /* Linearly interpolate from the previous color to the current. + Scale the colors from 0..255 to 0..1 and determine the multipliers for interpolation. + C{r,g,b}(t, section) = t - offset_(section-1) + t * Multiplier{r,g,b}. + */ + + ColorTuple curColor = { SkTo(SkColorGetR(endColor)), + SkTo(SkColorGetG(endColor)), + SkTo(SkColorGetB(endColor)) }; + + ColorTuple prevColor = { SkTo(SkColorGetR(beginColor)), + SkTo(SkColorGetG(beginColor)), + SkTo(SkColorGetB(beginColor)) }; + + // Figure out how to scale each color component. + SkScalar multiplier[kColorComponents]; + for (int i = 0; i < kColorComponents; i++) { + static const SkScalar kColorScale = SkScalarInvert(255); + multiplier[i] = kColorScale * (curColor[i] - prevColor[i]) / range; + } + + // Calculate when we no longer need to keep a copy of the input parameter t. + // If the last component to use t is i, then dupInput[0..i - 1] = true + // and dupInput[i .. components] = false. + bool dupInput[kColorComponents]; + dupInput[kColorComponents - 1] = false; + for (int i = kColorComponents - 2; i >= 0; i--) { + dupInput[i] = dupInput[i + 1] || multiplier[i + 1] != 0; + } + + if (!dupInput[0] && multiplier[0] == 0) { + result->writeText("pop "); + } + + for (int i = 0; i < kColorComponents; i++) { + // If the next components needs t and this component will consume a + // copy, make another copy. + if (dupInput[i] && multiplier[i] != 0) { + result->writeText("dup "); + } + + if (multiplier[i] == 0) { + SkPDFUtils::AppendColorComponent(prevColor[i], result); + result->writeText(" "); + } else { + if (multiplier[i] != 1) { + SkPDFUtils::AppendScalar(multiplier[i], result); + result->writeText(" mul "); + } + if (prevColor[i] != 0) { + SkPDFUtils::AppendColorComponent(prevColor[i], result); + result->writeText(" add "); + } + } + + if (dupInput[i]) { + result->writeText("exch "); + } + } +} + +static void write_gradient_ranges(const SkShaderBase::GradientInfo& info, SkSpan rangeEnds, + bool top, bool first, SkDynamicMemoryWStream* result) { + SkASSERT(rangeEnds.size() > 0); + + size_t rangeEndIndex = rangeEnds[rangeEnds.size() - 1]; + SkScalar rangeEnd = info.fColorOffsets[rangeEndIndex]; + + // Each range check tests 0 < t <= end. + if (top) { + SkASSERT(first); + // t may have been set to 0 to signal that the answer has already been found. + result->writeText("dup dup 0 gt exch "); // In Preview 11.0 (1033.3) `0. 0 ne` is true. + SkPDFUtils::AppendScalar(rangeEnd, result); + result->writeText(" le and {\n"); + } else if (first) { + // After the top level check, only t <= end needs to be tested on if (lo) side. + result->writeText("dup "); + SkPDFUtils::AppendScalar(rangeEnd, result); + result->writeText(" le {\n"); + } else { + // The else (hi) side. + result->writeText("{\n"); + } + + if (rangeEnds.size() == 1) { + // Set the stack to [r g b]. + size_t rangeBeginIndex = rangeEndIndex - 1; + SkScalar rangeBegin = info.fColorOffsets[rangeBeginIndex]; + SkPDFUtils::AppendScalar(rangeBegin, result); + result->writeText(" sub "); // consume t, put t - startOffset on the stack. + interpolate_color_code(rangeEnd - rangeBegin, + info.fColors[rangeBeginIndex], info.fColors[rangeEndIndex], result); + result->writeText("\n"); + } else { + size_t loCount = rangeEnds.size() / 2; + SkSpan loSpan = rangeEnds.subspan(0, loCount); + write_gradient_ranges(info, loSpan, false, true, result); + + SkSpan hiSpan = rangeEnds.subspan(loCount, rangeEnds.size() - loCount); + write_gradient_ranges(info, hiSpan, false, false, result); + } + + if (top) { + // Put 0 on the stack for t once here instead of after every call to interpolate_color_code. + result->writeText("0} if\n"); + } else if (first) { + result->writeText("}"); // The else (hi) side will come next. + } else { + result->writeText("} ifelse\n"); + } +} + +/* Generate Type 4 function code to map t to the passed gradient, clamping at the ends. + The types integer, real, and boolean are available. + There are no string, array, procedure, variable, or name types available. + + The generated code will be of the following form with all values hard coded. + + if (t <= 0) { + ret = color[0]; + t = 0; + } + if (t > 0 && t <= stop[4]) { + if (t <= stop[2]) { + if (t <= stop[1]) { + ret = interp(t - stop[0], stop[1] - stop[0], color[0], color[1]); + } else { + ret = interp(t - stop[1], stop[2] - stop[1], color[1], color[2]); + } + } else { + if (t <= stop[3] { + ret = interp(t - stop[2], stop[3] - stop[2], color[2], color[3]); + } else { + ret = interp(t - stop[3], stop[4] - stop[3], color[3], color[4]); + } + } + t = 0; + } + if (t > 0) { + ret = color[4]; + } + + which in PDF will be represented like + + dup 0 le {pop 0 0 0 0} if + dup dup 0 gt exch 1 le and { + dup .5 le { + dup .25 le { + 0 sub 2 mul 0 0 + }{ + .25 sub .5 exch 2 mul 0 + } ifelse + }{ + dup .75 le { + .5 sub .5 exch .5 exch 2 mul + }{ + .75 sub dup 2 mul .5 add exch dup 2 mul .5 add exch 2 mul .5 add + } ifelse + } ifelse + 0} if + 0 gt {1 1 1} if + */ +static void gradient_function_code(const SkShaderBase::GradientInfo& info, + SkDynamicMemoryWStream* result) { + // While looking for a hit the stack is [t]. + // After finding a hit the stack is [r g b 0]. + // The 0 is consumed just before returning. + + // The initial range has no previous and contains a solid color. + // Any t <= 0 will be handled by this initial range, so later t == 0 indicates a hit was found. + result->writeText("dup 0 le {pop "); + SkPDFUtils::AppendColorComponent(SkColorGetR(info.fColors[0]), result); + result->writeText(" "); + SkPDFUtils::AppendColorComponent(SkColorGetG(info.fColors[0]), result); + result->writeText(" "); + SkPDFUtils::AppendColorComponent(SkColorGetB(info.fColors[0]), result); + result->writeText(" 0} if\n"); + + // Optimize out ranges which don't make any visual difference. + AutoSTMalloc<4, size_t> rangeEnds(info.fColorCount); + size_t rangeEndsCount = 0; + for (int i = 1; i < info.fColorCount; ++i) { + // Ignoring the alpha, is this range the same solid color as the next range? + // This optimizes gradients where sometimes only the color or only the alpha is changing. + auto eqIgnoringAlpha = [](SkColor a, SkColor b) { + return SkColorSetA(a, 0x00) == SkColorSetA(b, 0x00); + }; + bool constantColorBothSides = + eqIgnoringAlpha(info.fColors[i-1], info.fColors[i]) &&// This range is a solid color. + i != info.fColorCount-1 && // This is not the last range. + eqIgnoringAlpha(info.fColors[i], info.fColors[i+1]); // Next range is same solid color. + + // Does this range have zero size? + bool degenerateRange = info.fColorOffsets[i-1] == info.fColorOffsets[i]; + + if (!degenerateRange && !constantColorBothSides) { + rangeEnds[rangeEndsCount] = i; + ++rangeEndsCount; + } + } + + // If a cap on depth is needed, loop here. + write_gradient_ranges(info, SkSpan(rangeEnds.get(), rangeEndsCount), true, true, result); + + // Clamp the final color. + result->writeText("0 gt {"); + SkPDFUtils::AppendColorComponent(SkColorGetR(info.fColors[info.fColorCount - 1]), result); + result->writeText(" "); + SkPDFUtils::AppendColorComponent(SkColorGetG(info.fColors[info.fColorCount - 1]), result); + result->writeText(" "); + SkPDFUtils::AppendColorComponent(SkColorGetB(info.fColors[info.fColorCount - 1]), result); + result->writeText("} if\n"); +} + +static std::unique_ptr createInterpolationFunction(const ColorTuple& color1, + const ColorTuple& color2) { + auto retval = SkPDFMakeDict(); + + auto c0 = SkPDFMakeArray(); + c0->appendColorComponent(color1[0]); + c0->appendColorComponent(color1[1]); + c0->appendColorComponent(color1[2]); + retval->insertObject("C0", std::move(c0)); + + auto c1 = SkPDFMakeArray(); + c1->appendColorComponent(color2[0]); + c1->appendColorComponent(color2[1]); + c1->appendColorComponent(color2[2]); + retval->insertObject("C1", std::move(c1)); + + retval->insertObject("Domain", SkPDFMakeArray(0, 1)); + + retval->insertInt("FunctionType", 2); + retval->insertScalar("N", 1.0f); + + return retval; +} + +static std::unique_ptr gradientStitchCode(const SkShaderBase::GradientInfo& info) { + auto retval = SkPDFMakeDict(); + + // normalize color stops + int colorCount = info.fColorCount; + std::vector colors(info.fColors, info.fColors + colorCount); + std::vector colorOffsets(info.fColorOffsets, info.fColorOffsets + colorCount); + + int i = 1; + while (i < colorCount - 1) { + // ensure stops are in order + if (colorOffsets[i - 1] > colorOffsets[i]) { + colorOffsets[i] = colorOffsets[i - 1]; + } + + // remove points that are between 2 coincident points + if ((colorOffsets[i - 1] == colorOffsets[i]) && (colorOffsets[i] == colorOffsets[i + 1])) { + colorCount -= 1; + colors.erase(colors.begin() + i); + colorOffsets.erase(colorOffsets.begin() + i); + } else { + i++; + } + } + // find coincident points and slightly move them over + for (i = 1; i < colorCount - 1; i++) { + if (colorOffsets[i - 1] == colorOffsets[i]) { + colorOffsets[i] += 0.00001f; + } + } + // check if last 2 stops coincide + if (colorOffsets[i - 1] == colorOffsets[i]) { + colorOffsets[i - 1] -= 0.00001f; + } + + AutoSTMalloc<4, ColorTuple> colorDataAlloc(colorCount); + ColorTuple *colorData = colorDataAlloc.get(); + for (int idx = 0; idx < colorCount; idx++) { + colorData[idx][0] = SkColorGetR(colors[idx]); + colorData[idx][1] = SkColorGetG(colors[idx]); + colorData[idx][2] = SkColorGetB(colors[idx]); + } + + // no need for a stitch function if there are only 2 stops. + if (colorCount == 2) + return createInterpolationFunction(colorData[0], colorData[1]); + + auto encode = SkPDFMakeArray(); + auto bounds = SkPDFMakeArray(); + auto functions = SkPDFMakeArray(); + + retval->insertObject("Domain", SkPDFMakeArray(0, 1)); + retval->insertInt("FunctionType", 3); + + for (int idx = 1; idx < colorCount; idx++) { + if (idx > 1) { + bounds->appendScalar(colorOffsets[idx-1]); + } + + encode->appendScalar(0); + encode->appendScalar(1.0f); + + functions->appendObject(createInterpolationFunction(colorData[idx-1], colorData[idx])); + } + + retval->insertObject("Encode", std::move(encode)); + retval->insertObject("Bounds", std::move(bounds)); + retval->insertObject("Functions", std::move(functions)); + + return retval; +} + +/* Map a value of t on the stack into [0, 1) for Repeat or Mirror tile mode. */ +static void tileModeCode(SkTileMode mode, SkDynamicMemoryWStream* result) { + if (mode == SkTileMode::kRepeat) { + result->writeText("dup truncate sub\n"); // Get the fractional part. + result->writeText("dup 0 le {1 add} if\n"); // Map (-1,0) => (0,1) + return; + } + + if (mode == SkTileMode::kMirror) { + // In Preview 11.0 (1033.3) `a n mod r eq` (with a and n both integers, r integer or real) + // early aborts the function when false would be put on the stack. + // Work around this by re-writing `t 2 mod 1 eq` as `t 2 mod 0 gt`. + + // Map t mod 2 into [0, 1, 1, 0]. + // Code Stack t + result->writeText("abs " // +t + "dup " // +t.s +t.s + "truncate " // +t.s +t + "dup " // +t.s +t +t + "cvi " // +t.s +t +T + "2 mod " // +t.s +t (+T mod 2) + /*"1 eq "*/ "0 gt " // +t.s +t true|false + "3 1 roll " // true|false +t.s +t + "sub " // true|false 0.s + "exch " // 0.s true|false + "{1 exch sub} if\n"); // 1 - 0.s|0.s + } +} + +/** + * Returns PS function code that applies inverse perspective + * to a x, y point. + * The function assumes that the stack has at least two elements, + * and that the top 2 elements are numeric values. + * After executing this code on a PS stack, the last 2 elements are updated + * while the rest of the stack is preserved intact. + * inversePerspectiveMatrix is the inverse perspective matrix. + */ +static void apply_perspective_to_coordinates(const SkMatrix& inversePerspectiveMatrix, + SkDynamicMemoryWStream* code) { + if (!inversePerspectiveMatrix.hasPerspective()) { + return; + } + + // Perspective matrix should be: + // 1 0 0 + // 0 1 0 + // p0 p1 p2 + + const SkScalar p0 = inversePerspectiveMatrix[SkMatrix::kMPersp0]; + const SkScalar p1 = inversePerspectiveMatrix[SkMatrix::kMPersp1]; + const SkScalar p2 = inversePerspectiveMatrix[SkMatrix::kMPersp2]; + + // y = y / (p2 + p0 x + p1 y) + // x = x / (p2 + p0 x + p1 y) + + // Input on stack: x y + code->writeText(" dup "); // x y y + SkPDFUtils::AppendScalar(p1, code); // x y y p1 + code->writeText(" mul " // x y y*p1 + " 2 index "); // x y y*p1 x + SkPDFUtils::AppendScalar(p0, code); // x y y p1 x p0 + code->writeText(" mul "); // x y y*p1 x*p0 + SkPDFUtils::AppendScalar(p2, code); // x y y p1 x*p0 p2 + code->writeText(" add " // x y y*p1 x*p0+p2 + "add " // x y y*p1+x*p0+p2 + "3 1 roll " // y*p1+x*p0+p2 x y + "2 index " // z x y y*p1+x*p0+p2 + "div " // y*p1+x*p0+p2 x y/(y*p1+x*p0+p2) + "3 1 roll " // y/(y*p1+x*p0+p2) y*p1+x*p0+p2 x + "exch " // y/(y*p1+x*p0+p2) x y*p1+x*p0+p2 + "div " // y/(y*p1+x*p0+p2) x/(y*p1+x*p0+p2) + "exch\n"); // x/(y*p1+x*p0+p2) y/(y*p1+x*p0+p2) +} + +static void linearCode(const SkShaderBase::GradientInfo& info, + const SkMatrix& perspectiveRemover, + SkDynamicMemoryWStream* function) { + function->writeText("{"); + + apply_perspective_to_coordinates(perspectiveRemover, function); + + function->writeText("pop\n"); // Just ditch the y value. + tileModeCode((SkTileMode)info.fTileMode, function); + gradient_function_code(info, function); + function->writeText("}"); +} + +static void radialCode(const SkShaderBase::GradientInfo& info, + const SkMatrix& perspectiveRemover, + SkDynamicMemoryWStream* function) { + function->writeText("{"); + + apply_perspective_to_coordinates(perspectiveRemover, function); + + // Find the distance from the origin. + function->writeText("dup " // x y y + "mul " // x y^2 + "exch " // y^2 x + "dup " // y^2 x x + "mul " // y^2 x^2 + "add " // y^2+x^2 + "sqrt\n"); // sqrt(y^2+x^2) + + tileModeCode((SkTileMode)info.fTileMode, function); + gradient_function_code(info, function); + function->writeText("}"); +} + +/* Conical gradient shader, based on the Canvas spec for radial gradients + See: http://www.w3.org/TR/2dcontext/#dom-context-2d-createradialgradient + */ +static void twoPointConicalCode(const SkShaderBase::GradientInfo& info, + const SkMatrix& perspectiveRemover, + SkDynamicMemoryWStream* function) { + SkScalar dx = info.fPoint[1].fX - info.fPoint[0].fX; + SkScalar dy = info.fPoint[1].fY - info.fPoint[0].fY; + SkScalar r0 = info.fRadius[0]; + SkScalar dr = info.fRadius[1] - info.fRadius[0]; + SkScalar a = dx * dx + dy * dy - dr * dr; + + // First compute t, if the pixel falls outside the cone, then we'll end + // with 'false' on the stack, otherwise we'll push 'true' with t below it + + // We start with a stack of (x y), copy it and then consume one copy in + // order to calculate b and the other to calculate c. + function->writeText("{"); + + apply_perspective_to_coordinates(perspectiveRemover, function); + + function->writeText("2 copy "); + + // Calculate b and b^2; b = -2 * (y * dy + x * dx + r0 * dr). + SkPDFUtils::AppendScalar(dy, function); + function->writeText(" mul exch "); + SkPDFUtils::AppendScalar(dx, function); + function->writeText(" mul add "); + SkPDFUtils::AppendScalar(r0 * dr, function); + function->writeText(" add -2 mul dup dup mul\n"); + + // c = x^2 + y^2 + radius0^2 + function->writeText("4 2 roll dup mul exch dup mul add "); + SkPDFUtils::AppendScalar(r0 * r0, function); + function->writeText(" sub dup 4 1 roll\n"); + + // Contents of the stack at this point: c, b, b^2, c + + // if a = 0, then we collapse to a simpler linear case + if (a == 0) { + + // t = -c/b + function->writeText("pop pop div neg dup "); + + // compute radius(t) + SkPDFUtils::AppendScalar(dr, function); + function->writeText(" mul "); + SkPDFUtils::AppendScalar(r0, function); + function->writeText(" add\n"); + + // if r(t) < 0, then it's outside the cone + function->writeText("0 lt {pop false} {true} ifelse\n"); + + } else { + + // quadratic case: the Canvas spec wants the largest + // root t for which radius(t) > 0 + + // compute the discriminant (b^2 - 4ac) + SkPDFUtils::AppendScalar(a * 4, function); + function->writeText(" mul sub dup\n"); + + // if d >= 0, proceed + function->writeText("0 ge {\n"); + + // an intermediate value we'll use to compute the roots: + // q = -0.5 * (b +/- sqrt(d)) + function->writeText("sqrt exch dup 0 lt {exch -1 mul} if"); + function->writeText(" add -0.5 mul dup\n"); + + // first root = q / a + SkPDFUtils::AppendScalar(a, function); + function->writeText(" div\n"); + + // second root = c / q + function->writeText("3 1 roll div\n"); + + // put the larger root on top of the stack + function->writeText("2 copy gt {exch} if\n"); + + // compute radius(t) for larger root + function->writeText("dup "); + SkPDFUtils::AppendScalar(dr, function); + function->writeText(" mul "); + SkPDFUtils::AppendScalar(r0, function); + function->writeText(" add\n"); + + // if r(t) > 0, we have our t, pop off the smaller root and we're done + function->writeText(" 0 gt {exch pop true}\n"); + + // otherwise, throw out the larger one and try the smaller root + function->writeText("{pop dup\n"); + SkPDFUtils::AppendScalar(dr, function); + function->writeText(" mul "); + SkPDFUtils::AppendScalar(r0, function); + function->writeText(" add\n"); + + // if r(t) < 0, push false, otherwise the smaller root is our t + function->writeText("0 le {pop false} {true} ifelse\n"); + function->writeText("} ifelse\n"); + + // d < 0, clear the stack and push false + function->writeText("} {pop pop pop false} ifelse\n"); + } + + // if the pixel is in the cone, proceed to compute a color + function->writeText("{"); + tileModeCode((SkTileMode)info.fTileMode, function); + gradient_function_code(info, function); + + // otherwise, just write black + function->writeText("} {0 0 0} ifelse }"); +} + +static void sweepCode(const SkShaderBase::GradientInfo& info, + const SkMatrix& perspectiveRemover, + SkDynamicMemoryWStream* function) { + function->writeText("{exch atan 360 div\n"); + tileModeCode((SkTileMode)info.fTileMode, function); + gradient_function_code(info, function); + function->writeText("}"); +} + + +// catch cases where the inner just touches the outer circle +// and make the inner circle just inside the outer one to match raster +static void FixUpRadius(const SkPoint& p1, SkScalar& r1, const SkPoint& p2, SkScalar& r2) { + // detect touching circles + SkScalar distance = SkPoint::Distance(p1, p2); + SkScalar subtractRadii = fabs(r1 - r2); + if (fabs(distance - subtractRadii) < 0.002f) { + if (r1 > r2) { + r1 += 0.002f; + } else { + r2 += 0.002f; + } + } +} + +// Finds affine and persp such that in = affine * persp. +// but it returns the inverse of perspective matrix. +static bool split_perspective(const SkMatrix in, SkMatrix* affine, + SkMatrix* perspectiveInverse) { + const SkScalar p2 = in[SkMatrix::kMPersp2]; + + if (SkScalarNearlyZero(p2)) { + return false; + } + + const SkScalar zero = SkIntToScalar(0); + const SkScalar one = SkIntToScalar(1); + + const SkScalar sx = in[SkMatrix::kMScaleX]; + const SkScalar kx = in[SkMatrix::kMSkewX]; + const SkScalar tx = in[SkMatrix::kMTransX]; + const SkScalar ky = in[SkMatrix::kMSkewY]; + const SkScalar sy = in[SkMatrix::kMScaleY]; + const SkScalar ty = in[SkMatrix::kMTransY]; + const SkScalar p0 = in[SkMatrix::kMPersp0]; + const SkScalar p1 = in[SkMatrix::kMPersp1]; + + // Perspective matrix would be: + // 1 0 0 + // 0 1 0 + // p0 p1 p2 + // But we need the inverse of persp. + perspectiveInverse->setAll(one, zero, zero, + zero, one, zero, + -p0/p2, -p1/p2, 1/p2); + + affine->setAll(sx - p0 * tx / p2, kx - p1 * tx / p2, tx / p2, + ky - p0 * ty / p2, sy - p1 * ty / p2, ty / p2, + zero, zero, one); + + return true; +} + +static SkPDFIndirectReference make_ps_function(std::unique_ptr psCode, + std::unique_ptr domain, + std::unique_ptr range, + SkPDFDocument* doc) { + std::unique_ptr dict = SkPDFMakeDict(); + dict->insertInt("FunctionType", 4); + dict->insertObject("Domain", std::move(domain)); + dict->insertObject("Range", std::move(range)); + return SkPDFStreamOut(std::move(dict), std::move(psCode), doc); +} + +static SkPDFIndirectReference make_function_shader(SkPDFDocument* doc, + const SkPDFGradientShader::Key& state) { + SkPoint transformPoints[2]; + const SkShaderBase::GradientInfo& info = state.fInfo; + SkMatrix finalMatrix = state.fCanvasTransform; + finalMatrix.preConcat(state.fShaderTransform); + + bool doStitchFunctions = (state.fType == SkShaderBase::GradientType::kLinear || + state.fType == SkShaderBase::GradientType::kRadial || + state.fType == SkShaderBase::GradientType::kConical) && + (SkTileMode)info.fTileMode == SkTileMode::kClamp && + !finalMatrix.hasPerspective(); + + int32_t shadingType = 1; + auto pdfShader = SkPDFMakeDict(); + // The two point radial gradient further references + // state.fInfo + // in translating from x, y coordinates to the t parameter. So, we have + // to transform the points and radii according to the calculated matrix. + if (doStitchFunctions) { + pdfShader->insertObject("Function", gradientStitchCode(info)); + shadingType = (state.fType == SkShaderBase::GradientType::kLinear) ? 2 : 3; + + auto extend = SkPDFMakeArray(); + extend->reserve(2); + extend->appendBool(true); + extend->appendBool(true); + pdfShader->insertObject("Extend", std::move(extend)); + + std::unique_ptr coords; + if (state.fType == SkShaderBase::GradientType::kConical) { + SkScalar r1 = info.fRadius[0]; + SkScalar r2 = info.fRadius[1]; + SkPoint pt1 = info.fPoint[0]; + SkPoint pt2 = info.fPoint[1]; + FixUpRadius(pt1, r1, pt2, r2); + + coords = SkPDFMakeArray(pt1.x(), + pt1.y(), + r1, + pt2.x(), + pt2.y(), + r2); + } else if (state.fType == SkShaderBase::GradientType::kRadial) { + const SkPoint& pt1 = info.fPoint[0]; + coords = SkPDFMakeArray(pt1.x(), + pt1.y(), + 0, + pt1.x(), + pt1.y(), + info.fRadius[0]); + } else { + const SkPoint& pt1 = info.fPoint[0]; + const SkPoint& pt2 = info.fPoint[1]; + coords = SkPDFMakeArray(pt1.x(), + pt1.y(), + pt2.x(), + pt2.y()); + } + + pdfShader->insertObject("Coords", std::move(coords)); + } else { + // Depending on the type of the gradient, we want to transform the + // coordinate space in different ways. + transformPoints[0] = info.fPoint[0]; + transformPoints[1] = info.fPoint[1]; + switch (state.fType) { + case SkShaderBase::GradientType::kLinear: + break; + case SkShaderBase::GradientType::kRadial: + transformPoints[1] = transformPoints[0]; + transformPoints[1].fX += info.fRadius[0]; + break; + case SkShaderBase::GradientType::kConical: { + transformPoints[1] = transformPoints[0]; + transformPoints[1].fX += SK_Scalar1; + break; + } + case SkShaderBase::GradientType::kSweep: + transformPoints[1] = transformPoints[0]; + transformPoints[1].fX += SK_Scalar1; + break; + case SkShaderBase::GradientType::kColor: + case SkShaderBase::GradientType::kNone: + default: + return SkPDFIndirectReference(); + } + + // Move any scaling (assuming a unit gradient) or translation + // (and rotation for linear gradient), of the final gradient from + // info.fPoints to the matrix (updating bbox appropriately). Now + // the gradient can be drawn on on the unit segment. + SkMatrix mapperMatrix; + unit_to_points_matrix(transformPoints, &mapperMatrix); + + finalMatrix.preConcat(mapperMatrix); + + // Preserves as much as possible in the final matrix, and only removes + // the perspective. The inverse of the perspective is stored in + // perspectiveInverseOnly matrix and has 3 useful numbers + // (p0, p1, p2), while everything else is either 0 or 1. + // In this way the shader will handle it eficiently, with minimal code. + SkMatrix perspectiveInverseOnly = SkMatrix::I(); + if (finalMatrix.hasPerspective()) { + if (!split_perspective(finalMatrix, + &finalMatrix, &perspectiveInverseOnly)) { + return SkPDFIndirectReference(); + } + } + + SkRect bbox; + bbox.set(state.fBBox); + if (!SkPDFUtils::InverseTransformBBox(finalMatrix, &bbox)) { + return SkPDFIndirectReference(); + } + SkDynamicMemoryWStream functionCode; + + SkShaderBase::GradientInfo infoCopy = info; + + if (state.fType == SkShaderBase::GradientType::kConical) { + SkMatrix inverseMapperMatrix; + if (!mapperMatrix.invert(&inverseMapperMatrix)) { + return SkPDFIndirectReference(); + } + inverseMapperMatrix.mapPoints(infoCopy.fPoint, 2); + infoCopy.fRadius[0] = inverseMapperMatrix.mapRadius(info.fRadius[0]); + infoCopy.fRadius[1] = inverseMapperMatrix.mapRadius(info.fRadius[1]); + } + switch (state.fType) { + case SkShaderBase::GradientType::kLinear: + linearCode(infoCopy, perspectiveInverseOnly, &functionCode); + break; + case SkShaderBase::GradientType::kRadial: + radialCode(infoCopy, perspectiveInverseOnly, &functionCode); + break; + case SkShaderBase::GradientType::kConical: + twoPointConicalCode(infoCopy, perspectiveInverseOnly, &functionCode); + break; + case SkShaderBase::GradientType::kSweep: + sweepCode(infoCopy, perspectiveInverseOnly, &functionCode); + break; + default: + SkASSERT(false); + } + pdfShader->insertObject( + "Domain", SkPDFMakeArray(bbox.left(), bbox.right(), bbox.top(), bbox.bottom())); + + auto domain = SkPDFMakeArray(bbox.left(), bbox.right(), bbox.top(), bbox.bottom()); + std::unique_ptr rangeObject = SkPDFMakeArray(0, 1, 0, 1, 0, 1); + pdfShader->insertRef("Function", + make_ps_function(functionCode.detachAsStream(), std::move(domain), + std::move(rangeObject), doc)); + } + + pdfShader->insertInt("ShadingType", shadingType); + pdfShader->insertName("ColorSpace", "DeviceRGB"); + + SkPDFDict pdfFunctionShader("Pattern"); + pdfFunctionShader.insertInt("PatternType", 2); + pdfFunctionShader.insertObject("Matrix", SkPDFUtils::MatrixToArray(finalMatrix)); + pdfFunctionShader.insertObject("Shading", std::move(pdfShader)); + return doc->emit(pdfFunctionShader); +} + +static SkPDFIndirectReference find_pdf_shader(SkPDFDocument* doc, + SkPDFGradientShader::Key key, + bool keyHasAlpha); + +static std::unique_ptr get_gradient_resource_dict(SkPDFIndirectReference functionShader, + SkPDFIndirectReference gState) { + std::vector patternShaders; + if (functionShader != SkPDFIndirectReference()) { + patternShaders.push_back(functionShader); + } + std::vector graphicStates; + if (gState != SkPDFIndirectReference()) { + graphicStates.push_back(gState); + } + return SkPDFMakeResourceDict(std::move(graphicStates), + std::move(patternShaders), + std::vector(), + std::vector()); +} + +// Creates a content stream which fills the pattern P0 across bounds. +// @param gsIndex A graphics state resource index to apply, or <0 if no +// graphics state to apply. +static std::unique_ptr create_pattern_fill_content(int gsIndex, + int patternIndex, + SkRect& bounds) { + SkDynamicMemoryWStream content; + if (gsIndex >= 0) { + SkPDFUtils::ApplyGraphicState(gsIndex, &content); + } + SkPDFUtils::ApplyPattern(patternIndex, &content); + SkPDFUtils::AppendRectangle(bounds, &content); + SkPDFUtils::PaintPath(SkPaint::kFill_Style, SkPathFillType::kEvenOdd, &content); + return content.detachAsStream(); +} + +static bool gradient_has_alpha(const SkPDFGradientShader::Key& key) { + SkASSERT(key.fType != SkShaderBase::GradientType::kNone); + for (int i = 0; i < key.fInfo.fColorCount; i++) { + if ((SkAlpha)SkColorGetA(key.fInfo.fColors[i]) != SK_AlphaOPAQUE) { + return true; + } + } + return false; +} + +// warning: does not set fHash on new key. (Both callers need to change fields.) +static SkPDFGradientShader::Key clone_key(const SkPDFGradientShader::Key& k) { + SkPDFGradientShader::Key clone = { + k.fType, + k.fInfo, // change pointers later. + std::unique_ptr(new SkColor[k.fInfo.fColorCount]), + std::unique_ptr(new SkScalar[k.fInfo.fColorCount]), + k.fCanvasTransform, + k.fShaderTransform, + k.fBBox, 0}; + clone.fInfo.fColors = clone.fColors.get(); + clone.fInfo.fColorOffsets = clone.fStops.get(); + for (int i = 0; i < clone.fInfo.fColorCount; i++) { + clone.fInfo.fColorOffsets[i] = k.fInfo.fColorOffsets[i]; + clone.fInfo.fColors[i] = k.fInfo.fColors[i]; + } + return clone; +} + +static SkPDFIndirectReference create_smask_graphic_state(SkPDFDocument* doc, + const SkPDFGradientShader::Key& state) { + SkASSERT(state.fType != SkShaderBase::GradientType::kNone); + SkPDFGradientShader::Key luminosityState = clone_key(state); + for (int i = 0; i < luminosityState.fInfo.fColorCount; i++) { + SkAlpha alpha = SkColorGetA(luminosityState.fInfo.fColors[i]); + luminosityState.fInfo.fColors[i] = SkColorSetARGB(255, alpha, alpha, alpha); + } + luminosityState.fHash = hash(luminosityState); + + SkASSERT(!gradient_has_alpha(luminosityState)); + SkPDFIndirectReference luminosityShader = find_pdf_shader(doc, std::move(luminosityState), false); + std::unique_ptr resources = get_gradient_resource_dict(luminosityShader, + SkPDFIndirectReference()); + SkRect bbox = SkRect::Make(state.fBBox); + SkPDFIndirectReference alphaMask = + SkPDFMakeFormXObject(doc, + create_pattern_fill_content(-1, luminosityShader.fValue, bbox), + SkPDFUtils::RectToArray(bbox), + std::move(resources), + SkMatrix::I(), + "DeviceRGB"); + return SkPDFGraphicState::GetSMaskGraphicState( + alphaMask, false, SkPDFGraphicState::kLuminosity_SMaskMode, doc); +} + +static SkPDFIndirectReference make_alpha_function_shader(SkPDFDocument* doc, + const SkPDFGradientShader::Key& state) { + SkASSERT(state.fType != SkShaderBase::GradientType::kNone); + SkPDFGradientShader::Key opaqueState = clone_key(state); + for (int i = 0; i < opaqueState.fInfo.fColorCount; i++) { + opaqueState.fInfo.fColors[i] = SkColorSetA(opaqueState.fInfo.fColors[i], SK_AlphaOPAQUE); + } + opaqueState.fHash = hash(opaqueState); + + SkASSERT(!gradient_has_alpha(opaqueState)); + SkRect bbox = SkRect::Make(state.fBBox); + SkPDFIndirectReference colorShader = find_pdf_shader(doc, std::move(opaqueState), false); + if (!colorShader) { + return SkPDFIndirectReference(); + } + // Create resource dict with alpha graphics state as G0 and + // pattern shader as P0, then write content stream. + SkPDFIndirectReference alphaGsRef = create_smask_graphic_state(doc, state); + + std::unique_ptr resourceDict = get_gradient_resource_dict(colorShader, alphaGsRef); + + std::unique_ptr colorStream = + create_pattern_fill_content(alphaGsRef.fValue, colorShader.fValue, bbox); + std::unique_ptr alphaFunctionShader = SkPDFMakeDict(); + SkPDFUtils::PopulateTilingPatternDict(alphaFunctionShader.get(), bbox, + std::move(resourceDict), SkMatrix::I()); + return SkPDFStreamOut(std::move(alphaFunctionShader), std::move(colorStream), doc); +} + +static SkPDFGradientShader::Key make_key(const SkShader* shader, + const SkMatrix& canvasTransform, + const SkIRect& bbox) { + SkPDFGradientShader::Key key = { + SkShaderBase::GradientType::kNone, + {0, nullptr, nullptr, {{0, 0}, {0, 0}}, {0, 0}, SkTileMode::kClamp, 0}, + nullptr, + nullptr, + canvasTransform, + SkPDFUtils::GetShaderLocalMatrix(shader), + bbox, 0}; + key.fType = as_SB(shader)->asGradient(&key.fInfo); + SkASSERT(SkShaderBase::GradientType::kNone != key.fType); + SkASSERT(key.fInfo.fColorCount > 0); + key.fColors.reset(new SkColor[key.fInfo.fColorCount]); + key.fStops.reset(new SkScalar[key.fInfo.fColorCount]); + key.fInfo.fColors = key.fColors.get(); + key.fInfo.fColorOffsets = key.fStops.get(); + as_SB(shader)->asGradient(&key.fInfo); + key.fHash = hash(key); + return key; +} + +static SkPDFIndirectReference find_pdf_shader(SkPDFDocument* doc, + SkPDFGradientShader::Key key, + bool keyHasAlpha) { + SkASSERT(gradient_has_alpha(key) == keyHasAlpha); + auto& gradientPatternMap = doc->fGradientPatternMap; + if (SkPDFIndirectReference* ptr = gradientPatternMap.find(key)) { + return *ptr; + } + SkPDFIndirectReference pdfShader; + if (keyHasAlpha) { + pdfShader = make_alpha_function_shader(doc, key); + } else { + pdfShader = make_function_shader(doc, key); + } + gradientPatternMap.set(std::move(key), pdfShader); + return pdfShader; +} + +SkPDFIndirectReference SkPDFGradientShader::Make(SkPDFDocument* doc, + SkShader* shader, + const SkMatrix& canvasTransform, + const SkIRect& bbox) { + SkASSERT(shader); + SkASSERT(as_SB(shader)->asGradient() != SkShaderBase::GradientType::kNone); + SkPDFGradientShader::Key key = make_key(shader, canvasTransform, bbox); + bool alpha = gradient_has_alpha(key); + return find_pdf_shader(doc, std::move(key), alpha); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFGradientShader.h b/gfx/skia/skia/src/pdf/SkPDFGradientShader.h new file mode 100644 index 0000000000..d1e4dea594 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFGradientShader.h @@ -0,0 +1,67 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPDFGradientShader_DEFINED +#define SkPDFGradientShader_DEFINED + +#include "include/core/SkShader.h" +#include "src/pdf/SkPDFTypes.h" +#include "src/pdf/SkPDFUtils.h" +#include "src/shaders/SkShaderBase.h" + +class SkMatrix; +class SkPDFDocument; +struct SkIRect; + +namespace SkPDFGradientShader { + +SkPDFIndirectReference Make(SkPDFDocument* doc, + SkShader* shader, + const SkMatrix& matrix, + const SkIRect& surfaceBBox); + +struct Key { + SkShaderBase::GradientType fType; + SkShaderBase::GradientInfo fInfo; + std::unique_ptr fColors; + std::unique_ptr fStops; + SkMatrix fCanvasTransform; + SkMatrix fShaderTransform; + SkIRect fBBox; + uint32_t fHash; +}; + +struct KeyHash { + uint32_t operator()(const Key& k) const { return k.fHash; } +}; + +inline bool operator==(const SkShaderBase::GradientInfo& u, const SkShaderBase::GradientInfo& v) { + return u.fColorCount == v.fColorCount + && u.fPoint[0] == v.fPoint[0] + && u.fPoint[1] == v.fPoint[1] + && u.fRadius[0] == v.fRadius[0] + && u.fRadius[1] == v.fRadius[1] + && u.fTileMode == v.fTileMode + && u.fGradientFlags == v.fGradientFlags + && SkPackedArrayEqual(u.fColors, v.fColors, u.fColorCount) + && SkPackedArrayEqual(u.fColorOffsets, v.fColorOffsets, u.fColorCount); +} + +inline bool operator==(const Key& u, const Key& v) { + SkASSERT(u.fInfo.fColors == u.fColors.get()); + SkASSERT(u.fInfo.fColorOffsets == u.fStops.get()); + SkASSERT(v.fInfo.fColors == v.fColors.get()); + SkASSERT(v.fInfo.fColorOffsets == v.fStops.get()); + return u.fType == v.fType + && u.fInfo == v.fInfo + && u.fCanvasTransform == v.fCanvasTransform + && u.fShaderTransform == v.fShaderTransform + && u.fBBox == v.fBBox; +} +inline bool operator!=(const Key& u, const Key& v) { return !(u == v); } + +} // namespace SkPDFGradientShader +#endif // SkPDFGradientShader_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.cpp b/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.cpp new file mode 100644 index 0000000000..dfd2214fbf --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.cpp @@ -0,0 +1,237 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#include "src/pdf/SkPDFGraphicStackState.h" + +#include "include/core/SkStream.h" +#include "include/pathops/SkPathOps.h" +#include "src/pdf/SkPDFUtils.h" +#include "src/utils/SkClipStackUtils.h" + +static void emit_pdf_color(SkColor4f color, SkWStream* result) { + SkASSERT(color.fA == 1); // We handle alpha elsewhere. + SkPDFUtils::AppendColorComponentF(color.fR, result); + result->writeText(" "); + SkPDFUtils::AppendColorComponentF(color.fG, result); + result->writeText(" "); + SkPDFUtils::AppendColorComponentF(color.fB, result); + result->writeText(" "); +} + +static SkRect rect_intersect(SkRect u, SkRect v) { + if (u.isEmpty() || v.isEmpty()) { return {0, 0, 0, 0}; } + return u.intersect(v) ? u : SkRect{0, 0, 0, 0}; +} + +// Test to see if the clipstack is a simple rect, If so, we can avoid all PathOps code +// and speed thing up. +static bool is_rect(const SkClipStack& clipStack, const SkRect& bounds, SkRect* dst) { + SkRect currentClip = bounds; + SkClipStack::Iter iter(clipStack, SkClipStack::Iter::kBottom_IterStart); + while (const SkClipStack::Element* element = iter.next()) { + SkRect elementRect{0, 0, 0, 0}; + switch (element->getDeviceSpaceType()) { + case SkClipStack::Element::DeviceSpaceType::kEmpty: + break; + case SkClipStack::Element::DeviceSpaceType::kRect: + elementRect = element->getDeviceSpaceRect(); + break; + default: + return false; + } + if (element->isReplaceOp()) { + currentClip = rect_intersect(bounds, elementRect); + } else if (element->getOp() == SkClipOp::kIntersect) { + currentClip = rect_intersect(currentClip, elementRect); + } else { + return false; + } + } + *dst = currentClip; + return true; +} + +// TODO: When there's no expanding clip ops, this function may not be necessary anymore. +static bool is_complex_clip(const SkClipStack& stack) { + SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); + while (const SkClipStack::Element* element = iter.next()) { + if (element->isReplaceOp() || + (element->getOp() != SkClipOp::kDifference && + element->getOp() != SkClipOp::kIntersect)) { + return true; + } + } + return false; +} + +template +static void apply_clip(const SkClipStack& stack, const SkRect& outerBounds, F fn) { + // assumes clipstack is not complex. + constexpr SkRect kHuge{-30000, -30000, 30000, 30000}; + SkClipStack::Iter iter(stack, SkClipStack::Iter::kBottom_IterStart); + SkRect bounds = outerBounds; + while (const SkClipStack::Element* element = iter.next()) { + SkPath operand; + element->asDeviceSpacePath(&operand); + SkPathOp op; + switch (element->getOp()) { + case SkClipOp::kDifference: op = kDifference_SkPathOp; break; + case SkClipOp::kIntersect: op = kIntersect_SkPathOp; break; + default: SkASSERT(false); return; + } + if (op == kDifference_SkPathOp || + operand.isInverseFillType() || + !kHuge.contains(operand.getBounds())) + { + Op(SkPath::Rect(bounds), operand, op, &operand); + } + SkASSERT(!operand.isInverseFillType()); + fn(operand); + if (!bounds.intersect(operand.getBounds())) { + return; // return early; + } + } +} + +static void append_clip_path(const SkPath& clipPath, SkWStream* wStream) { + SkPDFUtils::EmitPath(clipPath, SkPaint::kFill_Style, wStream); + SkPathFillType clipFill = clipPath.getFillType(); + NOT_IMPLEMENTED(clipFill == SkPathFillType::kInverseEvenOdd, false); + NOT_IMPLEMENTED(clipFill == SkPathFillType::kInverseWinding, false); + if (clipFill == SkPathFillType::kEvenOdd) { + wStream->writeText("W* n\n"); + } else { + wStream->writeText("W n\n"); + } +} + +static void append_clip(const SkClipStack& clipStack, + const SkIRect& bounds, + SkWStream* wStream) { + // The bounds are slightly outset to ensure this is correct in the + // face of floating-point accuracy and possible SkRegion bitmap + // approximations. + SkRect outsetBounds = SkRect::Make(bounds.makeOutset(1, 1)); + + SkRect clipStackRect; + if (is_rect(clipStack, outsetBounds, &clipStackRect)) { + SkPDFUtils::AppendRectangle(clipStackRect, wStream); + wStream->writeText("W* n\n"); + return; + } + + if (is_complex_clip(clipStack)) { + SkPath clipPath; + SkClipStack_AsPath(clipStack, &clipPath); + if (Op(clipPath, SkPath::Rect(outsetBounds), kIntersect_SkPathOp, &clipPath)) { + append_clip_path(clipPath, wStream); + } + // If Op() fails (pathological case; e.g. input values are + // extremely large or NaN), emit no clip at all. + } else { + apply_clip(clipStack, outsetBounds, [wStream](const SkPath& path) { + append_clip_path(path, wStream); + }); + } +} + +//////////////////////////////////////////////////////////////////////////////// + +void SkPDFGraphicStackState::updateClip(const SkClipStack* clipStack, const SkIRect& bounds) { + uint32_t clipStackGenID = clipStack ? clipStack->getTopmostGenID() + : SkClipStack::kWideOpenGenID; + if (clipStackGenID == currentEntry()->fClipStackGenID) { + return; + } + while (fStackDepth > 0) { + this->pop(); + if (clipStackGenID == currentEntry()->fClipStackGenID) { + return; + } + } + SkASSERT(currentEntry()->fClipStackGenID == SkClipStack::kWideOpenGenID); + if (clipStackGenID != SkClipStack::kWideOpenGenID) { + SkASSERT(clipStack); + this->push(); + + currentEntry()->fClipStackGenID = clipStackGenID; + append_clip(*clipStack, bounds, fContentStream); + } +} + + +void SkPDFGraphicStackState::updateMatrix(const SkMatrix& matrix) { + if (matrix == currentEntry()->fMatrix) { + return; + } + + if (currentEntry()->fMatrix.getType() != SkMatrix::kIdentity_Mask) { + SkASSERT(fStackDepth > 0); + SkASSERT(fEntries[fStackDepth].fClipStackGenID == + fEntries[fStackDepth -1].fClipStackGenID); + this->pop(); + + SkASSERT(currentEntry()->fMatrix.getType() == SkMatrix::kIdentity_Mask); + } + if (matrix.getType() == SkMatrix::kIdentity_Mask) { + return; + } + + this->push(); + SkPDFUtils::AppendTransform(matrix, fContentStream); + currentEntry()->fMatrix = matrix; +} + +void SkPDFGraphicStackState::updateDrawingState(const SkPDFGraphicStackState::Entry& state) { + // PDF treats a shader as a color, so we only set one or the other. + if (state.fShaderIndex >= 0) { + if (state.fShaderIndex != currentEntry()->fShaderIndex) { + SkPDFUtils::ApplyPattern(state.fShaderIndex, fContentStream); + currentEntry()->fShaderIndex = state.fShaderIndex; + } + } else if (state.fColor != currentEntry()->fColor || currentEntry()->fShaderIndex >= 0) { + emit_pdf_color(state.fColor, fContentStream); + fContentStream->writeText("RG "); + emit_pdf_color(state.fColor, fContentStream); + fContentStream->writeText("rg\n"); + currentEntry()->fColor = state.fColor; + currentEntry()->fShaderIndex = -1; + } + + if (state.fGraphicStateIndex != currentEntry()->fGraphicStateIndex) { + SkPDFUtils::ApplyGraphicState(state.fGraphicStateIndex, fContentStream); + currentEntry()->fGraphicStateIndex = state.fGraphicStateIndex; + } + + if (state.fTextScaleX) { + if (state.fTextScaleX != currentEntry()->fTextScaleX) { + SkScalar pdfScale = state.fTextScaleX * 100; + SkPDFUtils::AppendScalar(pdfScale, fContentStream); + fContentStream->writeText(" Tz\n"); + currentEntry()->fTextScaleX = state.fTextScaleX; + } + } +} + +void SkPDFGraphicStackState::push() { + SkASSERT(fStackDepth < kMaxStackDepth); + fContentStream->writeText("q\n"); + ++fStackDepth; + fEntries[fStackDepth] = fEntries[fStackDepth - 1]; +} + +void SkPDFGraphicStackState::pop() { + SkASSERT(fStackDepth > 0); + fContentStream->writeText("Q\n"); + fEntries[fStackDepth] = SkPDFGraphicStackState::Entry(); + --fStackDepth; +} + +void SkPDFGraphicStackState::drainStack() { + if (fContentStream) { + while (fStackDepth) { + this->pop(); + } + } + SkASSERT(fStackDepth == 0); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.h b/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.h new file mode 100644 index 0000000000..2ea890c1b0 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFGraphicStackState.h @@ -0,0 +1,41 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkPDFGraphicStackState_DEFINED +#define SkPDFGraphicStackState_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkScalar.h" +#include "include/private/base/SkFloatingPoint.h" +#include "src/core/SkClipStack.h" + +class SkDynamicMemoryWStream; + +// It is important to not confuse SkPDFGraphicStackState with SkPDFGraphicState, the +// later being our representation of an object in the PDF file. +struct SkPDFGraphicStackState { + struct Entry { + SkMatrix fMatrix = SkMatrix::I(); + uint32_t fClipStackGenID = SkClipStack::kWideOpenGenID; + SkColor4f fColor = {SK_FloatNaN, SK_FloatNaN, SK_FloatNaN, SK_FloatNaN}; + SkScalar fTextScaleX = 1; // Zero means we don't care what the value is. + int fShaderIndex = -1; + int fGraphicStateIndex = -1; + }; + // Must use stack for matrix, and for clip, plus one for no matrix or clip. + inline static constexpr int kMaxStackDepth = 2; + Entry fEntries[kMaxStackDepth + 1]; + int fStackDepth = 0; + SkDynamicMemoryWStream* fContentStream; + + SkPDFGraphicStackState(SkDynamicMemoryWStream* s = nullptr) : fContentStream(s) {} + void updateClip(const SkClipStack* clipStack, const SkIRect& bounds); + void updateMatrix(const SkMatrix& matrix); + void updateDrawingState(const Entry& state); + void push(); + void pop(); + void drainStack(); + Entry* currentEntry() { return &fEntries[fStackDepth]; } +}; + +#endif // SkPDFGraphicStackState_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFGraphicState.cpp b/gfx/skia/skia/src/pdf/SkPDFGraphicState.cpp new file mode 100644 index 0000000000..6cab7441a6 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFGraphicState.cpp @@ -0,0 +1,142 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFGraphicState.h" + +#include "include/core/SkData.h" +#include "include/core/SkPaint.h" +#include "include/docs/SkPDFDocument.h" +#include "include/private/base/SkTo.h" +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFFormXObject.h" +#include "src/pdf/SkPDFUtils.h" + +static const char* as_pdf_blend_mode_name(SkBlendMode mode) { + const char* name = SkPDFUtils::BlendModeName(mode); + SkASSERT(name); + return name; +} + +static int to_stroke_cap(uint8_t cap) { + // PDF32000.book section 8.4.3.3 "Line Cap Style" + switch ((SkPaint::Cap)cap) { + case SkPaint::kButt_Cap: return 0; + case SkPaint::kRound_Cap: return 1; + case SkPaint::kSquare_Cap: return 2; + default: SkASSERT(false); return 0; + } +} + +static int to_stroke_join(uint8_t join) { + // PDF32000.book section 8.4.3.4 "Line Join Style" + switch ((SkPaint::Join)join) { + case SkPaint::kMiter_Join: return 0; + case SkPaint::kRound_Join: return 1; + case SkPaint::kBevel_Join: return 2; + default: SkASSERT(false); return 0; + } +} + +// If a SkXfermode is unsupported in PDF, this function returns +// SrcOver, otherwise, it returns that Xfermode as a Mode. +static uint8_t pdf_blend_mode(SkBlendMode mode) { + if (!SkPDFUtils::BlendModeName(mode) + || SkBlendMode::kXor == mode + || SkBlendMode::kPlus == mode) + { + mode = SkBlendMode::kSrcOver; + } + return SkToU8((unsigned)mode); +} + +SkPDFIndirectReference SkPDFGraphicState::GetGraphicStateForPaint(SkPDFDocument* doc, + const SkPaint& p) { + SkASSERT(doc); + const SkBlendMode mode = p.getBlendMode_or(SkBlendMode::kSrcOver); + + if (SkPaint::kFill_Style == p.getStyle()) { + SkPDFFillGraphicState fillKey = {p.getColor4f().fA, pdf_blend_mode(mode)}; + auto& fillMap = doc->fFillGSMap; + if (SkPDFIndirectReference* statePtr = fillMap.find(fillKey)) { + return *statePtr; + } + SkPDFDict state; + state.reserve(2); + state.insertColorComponentF("ca", fillKey.fAlpha); + state.insertName("BM", as_pdf_blend_mode_name((SkBlendMode)fillKey.fBlendMode)); + SkPDFIndirectReference ref = doc->emit(state); + fillMap.set(fillKey, ref); + return ref; + } else { + SkPDFStrokeGraphicState strokeKey = { + p.getStrokeWidth(), + p.getStrokeMiter(), + p.getColor4f().fA, + SkToU8(p.getStrokeCap()), + SkToU8(p.getStrokeJoin()), + pdf_blend_mode(mode) + }; + auto& sMap = doc->fStrokeGSMap; + if (SkPDFIndirectReference* statePtr = sMap.find(strokeKey)) { + return *statePtr; + } + SkPDFDict state; + state.reserve(8); + state.insertColorComponentF("CA", strokeKey.fAlpha); + state.insertColorComponentF("ca", strokeKey.fAlpha); + state.insertInt("LC", to_stroke_cap(strokeKey.fStrokeCap)); + state.insertInt("LJ", to_stroke_join(strokeKey.fStrokeJoin)); + state.insertScalar("LW", strokeKey.fStrokeWidth); + state.insertScalar("ML", strokeKey.fStrokeMiter); + state.insertBool("SA", true); // SA = Auto stroke adjustment. + state.insertName("BM", as_pdf_blend_mode_name((SkBlendMode)strokeKey.fBlendMode)); + SkPDFIndirectReference ref = doc->emit(state); + sMap.set(strokeKey, ref); + return ref; + } +} + +//////////////////////////////////////////////////////////////////////////////// + +static SkPDFIndirectReference make_invert_function(SkPDFDocument* doc) { + // Acrobat crashes if we use a type 0 function, kpdf crashes if we use + // a type 2 function, so we use a type 4 function. + static const char psInvert[] = "{1 exch sub}"; + // Do not copy the trailing '\0' into the SkData. + auto invertFunction = SkData::MakeWithoutCopy(psInvert, strlen(psInvert)); + + std::unique_ptr dict = SkPDFMakeDict(); + dict->insertInt("FunctionType", 4); + dict->insertObject("Domain", SkPDFMakeArray(0, 1)); + dict->insertObject("Range", SkPDFMakeArray(0, 1)); + return SkPDFStreamOut(std::move(dict), SkMemoryStream::Make(std::move(invertFunction)), doc); +} + +SkPDFIndirectReference SkPDFGraphicState::GetSMaskGraphicState(SkPDFIndirectReference sMask, + bool invert, + SkPDFSMaskMode sMaskMode, + SkPDFDocument* doc) { + // The practical chances of using the same mask more than once are unlikely + // enough that it's not worth canonicalizing. + auto sMaskDict = SkPDFMakeDict("Mask"); + if (sMaskMode == kAlpha_SMaskMode) { + sMaskDict->insertName("S", "Alpha"); + } else if (sMaskMode == kLuminosity_SMaskMode) { + sMaskDict->insertName("S", "Luminosity"); + } + sMaskDict->insertRef("G", sMask); + if (invert) { + // let the doc deduplicate this object. + if (doc->fInvertFunction == SkPDFIndirectReference()) { + doc->fInvertFunction = make_invert_function(doc); + } + sMaskDict->insertRef("TR", doc->fInvertFunction); + } + SkPDFDict result("ExtGState"); + result.insertObject("SMask", std::move(sMaskDict)); + return doc->emit(result); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFGraphicState.h b/gfx/skia/skia/src/pdf/SkPDFGraphicState.h new file mode 100644 index 0000000000..20c5cf3326 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFGraphicState.h @@ -0,0 +1,71 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkPDFGraphicState_DEFINED +#define SkPDFGraphicState_DEFINED + +#include "include/private/base/SkMacros.h" +#include "src/core/SkOpts.h" +#include "src/pdf/SkPDFTypes.h" + +class SkPaint; + + +/** \class SkPDFGraphicState + SkPaint objects roughly correspond to graphic state dictionaries that can + be installed. So that a given dictionary is only output to the pdf file + once, we want to canonicalize them. +*/ +namespace SkPDFGraphicState { + enum SkPDFSMaskMode { + kAlpha_SMaskMode, + kLuminosity_SMaskMode + }; + + /** Get the graphic state for the passed SkPaint. + */ + SkPDFIndirectReference GetGraphicStateForPaint(SkPDFDocument*, const SkPaint&); + + /** Make a graphic state that only sets the passed soft mask. + * @param sMask The form xobject to use as a soft mask. + * @param invert Indicates if the alpha of the sMask should be inverted. + * @param sMaskMode Whether to use alpha or luminosity for the sMask. + * + * These are not de-duped. + */ + SkPDFIndirectReference GetSMaskGraphicState(SkPDFIndirectReference sMask, + bool invert, + SkPDFSMaskMode sMaskMode, + SkPDFDocument* doc); +} // namespace SkPDFGraphicState + +SK_BEGIN_REQUIRE_DENSE +struct SkPDFStrokeGraphicState { + SkScalar fStrokeWidth; + SkScalar fStrokeMiter; + SkScalar fAlpha; + uint8_t fStrokeCap; // SkPaint::Cap + uint8_t fStrokeJoin; // SkPaint::Join + uint8_t fBlendMode; // SkBlendMode + uint8_t fPADDING = 0; + bool operator==(const SkPDFStrokeGraphicState& o) const { return !memcmp(this, &o, sizeof(o)); } + bool operator!=(const SkPDFStrokeGraphicState& o) const { return !(*this == o); } +}; +SK_END_REQUIRE_DENSE + +SK_BEGIN_REQUIRE_DENSE +struct SkPDFFillGraphicState { + SkScalar fAlpha; + uint8_t fBlendMode; + uint8_t fPADDING[3] = {0, 0, 0}; + bool operator==(const SkPDFFillGraphicState& o) const { return !memcmp(this, &o, sizeof(o)); } + bool operator!=(const SkPDFFillGraphicState& o) const { return !(*this == o); } +}; +SK_END_REQUIRE_DENSE + +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.cpp b/gfx/skia/skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.cpp new file mode 100644 index 0000000000..85a4688ce8 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.cpp @@ -0,0 +1,206 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFMakeCIDGlyphWidthsArray.h" + +#include "include/core/SkPaint.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeSpec.h" +#include "src/pdf/SkPDFGlyphUse.h" + +#include +#include + +// TODO(halcanary): Write unit tests for SkPDFMakeCIDGlyphWidthsArray(). + +// TODO(halcanary): The logic in this file originated in several +// disparate places. I feel sure that someone could simplify this +// down to a single easy-to-read function. + +namespace { + +// scale from em-units to base-1000, returning as a SkScalar +SkScalar from_font_units(SkScalar scaled, uint16_t emSize) { + if (emSize == 1000) { + return scaled; + } else { + return scaled * 1000 / emSize; + } +} + +SkScalar scale_from_font_units(int16_t val, uint16_t emSize) { + return from_font_units(SkIntToScalar(val), emSize); +} + +// Unfortunately poppler does not appear to respect the default width setting. +#if defined(SK_PDF_CAN_USE_DW) +int16_t findMode(SkSpan advances) { + if (advances.empty()) { + return 0; + } + + int16_t previousAdvance = advances[0]; + int16_t currentModeAdvance = advances[0]; + size_t currentCount = 1; + size_t currentModeCount = 1; + + for (size_t i = 1; i < advances.size(); ++i) { + if (advances[i] == previousAdvance) { + ++currentCount; + } else { + if (currentCount > currentModeCount) { + currentModeAdvance = previousAdvance; + currentModeCount = currentCount; + } + previousAdvance = advances[i]; + currentCount = 1; + } + } + + return currentCount > currentModeCount ? previousAdvance : currentModeAdvance; +} +#endif +} // namespace + +/** Retrieve advance data for glyphs. Used by the PDF backend. */ +// TODO(halcanary): this function is complex enough to need its logic +// tested with unit tests. +std::unique_ptr SkPDFMakeCIDGlyphWidthsArray(const SkTypeface& typeface, + const SkPDFGlyphUse& subset, + SkScalar* defaultAdvance) { + // There are two ways of expressing advances + // + // range: " gfid [adv.ances adv.ances ... adv.ances]" + // run: " gfid gfid adv.ances" + // + // Assuming that on average + // the ASCII representation of an advance plus a space is 10 characters + // the ASCII representation of a glyph id plus a space is 4 characters + // the ASCII representation of unused gid plus a space in a range is 2 characters + // + // When not in a range or run + // a. Skipping don't cares or defaults is a win (trivial) + // b. Run wins for 2+ repeats " gid gid adv.ances" + // " gid [adv.ances adv.ances]" + // rule: 2+ repeats create run as long as possible, else start range + // + // When in a range + // Cost of stopping and starting a range is 8 characters "] gid [" + // c. Skipping defaults is always a win " adv.ances" + // rule: end range if default seen + // d. Skipping 4+ don't cares is a win " 0 0 0 0" + // rule: end range if 4+ don't cares + // Cost of stop and start range plus run is 28 characters "] gid gid adv.ances gid [" + // e. Switching for 2+ repeats and 4+ don't cares wins " 0 0 adv.ances 0 0 adv.ances" + // rule: end range for 2+ repeats with 4+ don't cares + // f. Switching for 3+ repeats wins " adv.ances adv.ances adv.ances" + // rule: end range for 3+ repeats + + int emSize; + SkStrikeSpec strikeSpec = SkStrikeSpec::MakePDFVector(typeface, &emSize); + SkBulkGlyphMetricsAndPaths paths{strikeSpec}; + + auto result = SkPDFMakeArray(); + + std::vector glyphIDs; + subset.getSetValues([&](unsigned index) { + glyphIDs.push_back(SkToU16(index)); + }); + auto glyphs = paths.glyphs(SkSpan(glyphIDs)); + +#if defined(SK_PDF_CAN_USE_DW) + std::vector advances; + advances.reserve_back(glyphs.size()); + for (const SkGlyph* glyph : glyphs) { + advances.push_back((int16_t)glyph->advanceX()); + } + std::sort(advances.begin(), advances.end()); + int16_t modeAdvance = findMode(SkSpan(advances)); + *defaultAdvance = scale_from_font_units(modeAdvance, emSize); +#else + *defaultAdvance = 0; +#endif + + for (size_t i = 0; i < glyphs.size(); ++i) { + int16_t advance = (int16_t)glyphs[i]->advanceX(); + +#if defined(SK_PDF_CAN_USE_DW) + // a. Skipping don't cares or defaults is a win (trivial) + if (advance == modeAdvance) { + continue; + } +#endif + + // b. 2+ repeats create run as long as possible, else start range + { + size_t j = i + 1; // j is always one past the last known repeat + for (; j < glyphs.size(); ++j) { + int16_t next_advance = (int16_t)glyphs[j]->advanceX(); + if (advance != next_advance) { + break; + } + } + if (j - i >= 2) { + result->appendInt(glyphs[i]->getGlyphID()); + result->appendInt(glyphs[j - 1]->getGlyphID()); + result->appendScalar(scale_from_font_units(advance, emSize)); + i = j - 1; + continue; + } + } + + { + result->appendInt(glyphs[i]->getGlyphID()); + auto advanceArray = SkPDFMakeArray(); + advanceArray->appendScalar(scale_from_font_units(advance, emSize)); + size_t j = i + 1; // j is always one past the last output + for (; j < glyphs.size(); ++j) { + advance = (int16_t)glyphs[j]->advanceX(); +#if defined(SK_PDF_CAN_USE_DW) + // c. end range if default seen + if (advance == modeAdvance) { + break; + } +#endif + + int dontCares = glyphs[j]->getGlyphID() - glyphs[j - 1]->getGlyphID() - 1; + // d. end range if 4+ don't cares + if (dontCares >= 4) { + break; + } + + int16_t next_advance = 0; + // e. end range for 2+ repeats with 4+ don't cares + if (j + 1 < glyphs.size()) { + next_advance = (int16_t)glyphs[j+1]->advanceX(); + int next_dontCares = glyphs[j+1]->getGlyphID() - glyphs[j]->getGlyphID() - 1; + if (advance == next_advance && dontCares + next_dontCares >= 4) { + break; + } + } + + // f. end range for 3+ repeats + if (j + 2 < glyphs.size() && advance == next_advance) { + next_advance = (int16_t)glyphs[j+2]->advanceX(); + if (advance == next_advance) { + break; + } + } + + while (dontCares --> 0) { + advanceArray->appendScalar(0); + } + advanceArray->appendScalar(scale_from_font_units(advance, emSize)); + } + result->appendObject(std::move(advanceArray)); + i = j - 1; + } + } + + return result; +} diff --git a/gfx/skia/skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.h b/gfx/skia/skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.h new file mode 100644 index 0000000000..fd541c2d58 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFMakeCIDGlyphWidthsArray.h @@ -0,0 +1,22 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPDFMakeCIDGlyphWidthsArray_DEFINED +#define SkPDFMakeCIDGlyphWidthsArray_DEFINED + +#include "src/pdf/SkPDFTypes.h" + +class SkPDFGlyphUse; +class SkTypeface; + +/* PDF 32000-1:2008, page 270: "The array's elements have a variable + format that can specify individual widths for consecutive CIDs or + one width for a range of CIDs". */ +std::unique_ptr SkPDFMakeCIDGlyphWidthsArray(const SkTypeface& typeface, + const SkPDFGlyphUse& subset, + SkScalar* defaultAdvance); + +#endif // SkPDFMakeCIDGlyphWidthsArray_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.cpp b/gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.cpp new file mode 100644 index 0000000000..e6d6c6f06c --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.cpp @@ -0,0 +1,220 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFMakeToUnicodeCmap.h" + +#include "include/private/base/SkTo.h" +#include "src/base/SkUTF.h" +#include "src/pdf/SkPDFUtils.h" + +static void append_tounicode_header(SkDynamicMemoryWStream* cmap, + bool multibyte) { + // 12 dict begin: 12 is an Adobe-suggested value. Shall not change. + // It's there to prevent old version Adobe Readers from malfunctioning. + const char* kHeader = + "/CIDInit /ProcSet findresource begin\n" + "12 dict begin\n" + "begincmap\n"; + cmap->writeText(kHeader); + + // The /CIDSystemInfo must be consistent to the one in + // SkPDFFont::populateCIDFont(). + // We can not pass over the system info object here because the format is + // different. This is not a reference object. + const char* kSysInfo = + "/CIDSystemInfo\n" + "<< /Registry (Adobe)\n" + "/Ordering (UCS)\n" + "/Supplement 0\n" + ">> def\n"; + cmap->writeText(kSysInfo); + + // The CMapName must be consistent to /CIDSystemInfo above. + // /CMapType 2 means ToUnicode. + // Codespace range just tells the PDF processor the valid range. + const char* kTypeInfoHeader = + "/CMapName /Adobe-Identity-UCS def\n" + "/CMapType 2 def\n" + "1 begincodespacerange\n"; + cmap->writeText(kTypeInfoHeader); + if (multibyte) { + cmap->writeText("<0000> \n"); + } else { + cmap->writeText("<00> \n"); + } + cmap->writeText("endcodespacerange\n"); +} + +static void append_cmap_footer(SkDynamicMemoryWStream* cmap) { + const char kFooter[] = + "endcmap\n" + "CMapName currentdict /CMap defineresource pop\n" + "end\n" + "end"; + cmap->writeText(kFooter); +} + +namespace { +struct BFChar { + SkGlyphID fGlyphId; + SkUnichar fUnicode; +}; + +struct BFRange { + SkGlyphID fStart; + SkGlyphID fEnd; + SkUnichar fUnicode; +}; +} // namespace + +static void write_glyph(SkDynamicMemoryWStream* cmap, + bool multiByte, + SkGlyphID gid) { + if (multiByte) { + SkPDFUtils::WriteUInt16BE(cmap, gid); + } else { + SkPDFUtils::WriteUInt8(cmap, SkToU8(gid)); + } +} + +static void append_bfchar_section(const std::vector& bfchar, + bool multiByte, + SkDynamicMemoryWStream* cmap) { + // PDF spec defines that every bf* list can have at most 100 entries. + for (size_t i = 0; i < bfchar.size(); i += 100) { + int count = SkToInt(bfchar.size() - i); + count = std::min(count, 100); + cmap->writeDecAsText(count); + cmap->writeText(" beginbfchar\n"); + for (int j = 0; j < count; ++j) { + cmap->writeText("<"); + write_glyph(cmap, multiByte, bfchar[i + j].fGlyphId); + cmap->writeText("> <"); + SkPDFUtils::WriteUTF16beHex(cmap, bfchar[i + j].fUnicode); + cmap->writeText(">\n"); + } + cmap->writeText("endbfchar\n"); + } +} + +static void append_bfrange_section(const std::vector& bfrange, + bool multiByte, + SkDynamicMemoryWStream* cmap) { + // PDF spec defines that every bf* list can have at most 100 entries. + for (size_t i = 0; i < bfrange.size(); i += 100) { + int count = SkToInt(bfrange.size() - i); + count = std::min(count, 100); + cmap->writeDecAsText(count); + cmap->writeText(" beginbfrange\n"); + for (int j = 0; j < count; ++j) { + cmap->writeText("<"); + write_glyph(cmap, multiByte, bfrange[i + j].fStart); + cmap->writeText("> <"); + write_glyph(cmap, multiByte, bfrange[i + j].fEnd); + cmap->writeText("> <"); + SkPDFUtils::WriteUTF16beHex(cmap, bfrange[i + j].fUnicode); + cmap->writeText(">\n"); + } + cmap->writeText("endbfrange\n"); + } +} + +// Generate and table according to PDF spec 1.4 and Adobe +// Technote 5014. +// The function is not static so we can test it in unit tests. +// +// Current implementation guarantees bfchar and bfrange entries do not overlap. +// +// Current implementation does not attempt aggressive optimizations against +// following case because the specification is not clear. +// +// 4 beginbfchar 1 beginbfchar +// <0003> <0013> <0020> <0014> +// <0005> <0015> to endbfchar +// <0007> <0017> 1 beginbfrange +// <0020> <0014> <0003> <0007> <0013> +// endbfchar endbfrange +// +// Adobe Technote 5014 said: "Code mappings (unlike codespace ranges) may +// overlap, but succeeding maps supersede preceding maps." +// +// In case of searching text in PDF, bfrange will have higher precedence so +// typing char id 0x0014 in search box will get glyph id 0x0004 first. However, +// the spec does not mention how will this kind of conflict being resolved. +// +// For the worst case (having 65536 continuous unicode and we use every other +// one of them), the possible savings by aggressive optimization is 416KB +// pre-compressed and does not provide enough motivation for implementation. +void SkPDFAppendCmapSections(const SkUnichar* glyphToUnicode, + const SkPDFGlyphUse* subset, + SkDynamicMemoryWStream* cmap, + bool multiByteGlyphs, + SkGlyphID firstGlyphID, + SkGlyphID lastGlyphID) { + int glyphOffset = 0; + if (!multiByteGlyphs) { + glyphOffset = firstGlyphID - 1; + } + + std::vector bfcharEntries; + std::vector bfrangeEntries; + + BFRange currentRangeEntry = {0, 0, 0}; + bool rangeEmpty = true; + const int limit = (int)lastGlyphID + 1 - glyphOffset; + + for (int i = firstGlyphID - glyphOffset; i < limit + 1; ++i) { + SkGlyphID gid = i + glyphOffset; + bool inSubset = i < limit && (subset == nullptr || subset->has(gid)); + if (!rangeEmpty) { + // PDF spec requires bfrange not changing the higher byte, + // e.g. <1035> <10FF> <2222> is ok, but + // <1035> <1100> <2222> is no good + bool inRange = + i == currentRangeEntry.fEnd + 1 && + i >> 8 == currentRangeEntry.fStart >> 8 && + i < limit && + glyphToUnicode[gid] == + currentRangeEntry.fUnicode + i - currentRangeEntry.fStart; + if (!inSubset || !inRange) { + if (currentRangeEntry.fEnd > currentRangeEntry.fStart) { + bfrangeEntries.push_back(currentRangeEntry); + } else { + bfcharEntries.push_back({currentRangeEntry.fStart, currentRangeEntry.fUnicode}); + } + rangeEmpty = true; + } + } + if (inSubset) { + currentRangeEntry.fEnd = i; + if (rangeEmpty) { + currentRangeEntry.fStart = i; + currentRangeEntry.fUnicode = glyphToUnicode[gid]; + rangeEmpty = false; + } + } + } + + // The spec requires all bfchar entries for a font must come before bfrange + // entries. + append_bfchar_section(bfcharEntries, multiByteGlyphs, cmap); + append_bfrange_section(bfrangeEntries, multiByteGlyphs, cmap); +} + +std::unique_ptr SkPDFMakeToUnicodeCmap( + const SkUnichar* glyphToUnicode, + const SkPDFGlyphUse* subset, + bool multiByteGlyphs, + SkGlyphID firstGlyphID, + SkGlyphID lastGlyphID) { + SkDynamicMemoryWStream cmap; + append_tounicode_header(&cmap, multiByteGlyphs); + SkPDFAppendCmapSections(glyphToUnicode, subset, &cmap, multiByteGlyphs, + firstGlyphID, lastGlyphID); + append_cmap_footer(&cmap); + return cmap.detachAsStream(); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.h b/gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.h new file mode 100644 index 0000000000..b77f23de16 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFMakeToUnicodeCmap.h @@ -0,0 +1,28 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPDFMakeToUnicodeCmap_DEFINED +#define SkPDFMakeToUnicodeCmap_DEFINED + +#include "include/core/SkStream.h" +#include "src/pdf/SkPDFFont.h" + +std::unique_ptr SkPDFMakeToUnicodeCmap( + const SkUnichar* glyphToUnicode, + const SkPDFGlyphUse* subset, + bool multiByteGlyphs, + SkGlyphID firstGlyphID, + SkGlyphID lastGlyphID); + +// Exposed for unit testing. +void SkPDFAppendCmapSections(const SkUnichar* glyphToUnicode, + const SkPDFGlyphUse* subset, + SkDynamicMemoryWStream* cmap, + bool multiByteGlyphs, + SkGlyphID firstGlyphID, + SkGlyphID lastGlyphID); + +#endif // SkPDFMakeToUnicodeCmap_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFMetadata.cpp b/gfx/skia/skia/src/pdf/SkPDFMetadata.cpp new file mode 100644 index 0000000000..943dfbc846 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFMetadata.cpp @@ -0,0 +1,325 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFMetadata.h" + +#include "include/private/base/SkTo.h" +#include "src/base/SkUTF.h" +#include "src/base/SkUtils.h" +#include "src/core/SkMD5.h" +#include "src/pdf/SkPDFTypes.h" + +#include + +static constexpr SkTime::DateTime kZeroTime = {0, 0, 0, 0, 0, 0, 0, 0}; + +static bool operator!=(const SkTime::DateTime& u, const SkTime::DateTime& v) { + return u.fTimeZoneMinutes != v.fTimeZoneMinutes || + u.fYear != v.fYear || + u.fMonth != v.fMonth || + u.fDayOfWeek != v.fDayOfWeek || + u.fDay != v.fDay || + u.fHour != v.fHour || + u.fMinute != v.fMinute || + u.fSecond != v.fSecond; +} + +static SkString pdf_date(const SkTime::DateTime& dt) { + int timeZoneMinutes = SkToInt(dt.fTimeZoneMinutes); + char timezoneSign = timeZoneMinutes >= 0 ? '+' : '-'; + int timeZoneHours = SkTAbs(timeZoneMinutes) / 60; + timeZoneMinutes = SkTAbs(timeZoneMinutes) % 60; + return SkStringPrintf( + "D:%04u%02u%02u%02u%02u%02u%c%02d'%02d'", + static_cast(dt.fYear), static_cast(dt.fMonth), + static_cast(dt.fDay), static_cast(dt.fHour), + static_cast(dt.fMinute), + static_cast(dt.fSecond), timezoneSign, timeZoneHours, + timeZoneMinutes); +} + +namespace { +static const struct { + const char* const key; + SkString SkPDF::Metadata::*const valuePtr; +} gMetadataKeys[] = { + {"Title", &SkPDF::Metadata::fTitle}, + {"Author", &SkPDF::Metadata::fAuthor}, + {"Subject", &SkPDF::Metadata::fSubject}, + {"Keywords", &SkPDF::Metadata::fKeywords}, + {"Creator", &SkPDF::Metadata::fCreator}, + {"Producer", &SkPDF::Metadata::fProducer}, +}; +} // namespace + +std::unique_ptr SkPDFMetadata::MakeDocumentInformationDict( + const SkPDF::Metadata& metadata) { + auto dict = SkPDFMakeDict(); + for (const auto keyValuePtr : gMetadataKeys) { + const SkString& value = metadata.*(keyValuePtr.valuePtr); + if (value.size() > 0) { + dict->insertTextString(keyValuePtr.key, value); + } + } + if (metadata.fCreation != kZeroTime) { + dict->insertTextString("CreationDate", pdf_date(metadata.fCreation)); + } + if (metadata.fModified != kZeroTime) { + dict->insertTextString("ModDate", pdf_date(metadata.fModified)); + } + return std::move(dict); +} + +SkUUID SkPDFMetadata::CreateUUID(const SkPDF::Metadata& metadata) { + // The main requirement is for the UUID to be unique; the exact + // format of the data that will be hashed is not important. + SkMD5 md5; + const char uuidNamespace[] = "org.skia.pdf\n"; + md5.writeText(uuidNamespace); + double msec = SkTime::GetMSecs(); + md5.write(&msec, sizeof(msec)); + SkTime::DateTime dateTime; + SkTime::GetDateTime(&dateTime); + md5.write(&dateTime, sizeof(dateTime)); + md5.write(&metadata.fCreation, sizeof(metadata.fCreation)); + md5.write(&metadata.fModified, sizeof(metadata.fModified)); + + for (const auto keyValuePtr : gMetadataKeys) { + md5.writeText(keyValuePtr.key); + md5.write("\037", 1); + const SkString& value = metadata.*(keyValuePtr.valuePtr); + md5.write(value.c_str(), value.size()); + md5.write("\036", 1); + } + SkMD5::Digest digest = md5.finish(); + // See RFC 4122, page 6-7. + digest.data[6] = (digest.data[6] & 0x0F) | 0x30; + digest.data[8] = (digest.data[6] & 0x3F) | 0x80; + static_assert(sizeof(digest) == sizeof(SkUUID), "uuid_size"); + SkUUID uuid; + memcpy((void*)&uuid, &digest, sizeof(digest)); + return uuid; +} + +std::unique_ptr SkPDFMetadata::MakePdfId(const SkUUID& doc, const SkUUID& instance) { + // /ID [ <81b14aafa313db63dbd6f981e49f94f4> + // <81b14aafa313db63dbd6f981e49f94f4> ] + auto array = SkPDFMakeArray(); + static_assert(sizeof(SkUUID) == 16, "uuid_size"); + array->appendByteString(SkString(reinterpret_cast(&doc ), sizeof(SkUUID))); + array->appendByteString(SkString(reinterpret_cast(&instance), sizeof(SkUUID))); + return std::move(array); +} + +// Convert a block of memory to hexadecimal. Input and output pointers will be +// moved to end of the range. +static void hexify(const uint8_t** inputPtr, char** outputPtr, int count) { + SkASSERT(inputPtr && *inputPtr); + SkASSERT(outputPtr && *outputPtr); + while (count-- > 0) { + uint8_t value = *(*inputPtr)++; + *(*outputPtr)++ = SkHexadecimalDigits::gLower[value >> 4]; + *(*outputPtr)++ = SkHexadecimalDigits::gLower[value & 0xF]; + } +} + +static SkString uuid_to_string(const SkUUID& uuid) { + // 8-4-4-4-12 + char buffer[36]; // [32 + 4] + char* ptr = buffer; + const uint8_t* data = uuid.fData; + hexify(&data, &ptr, 4); + *ptr++ = '-'; + hexify(&data, &ptr, 2); + *ptr++ = '-'; + hexify(&data, &ptr, 2); + *ptr++ = '-'; + hexify(&data, &ptr, 2); + *ptr++ = '-'; + hexify(&data, &ptr, 6); + SkASSERT(ptr == buffer + 36); + SkASSERT(data == uuid.fData + 16); + return SkString(buffer, 36); +} + +namespace { +class PDFXMLObject final : public SkPDFObject { +public: + PDFXMLObject(SkString xml) : fXML(std::move(xml)) {} + void emitObject(SkWStream* stream) const override { + SkPDFDict dict("Metadata"); + dict.insertName("Subtype", "XML"); + dict.insertInt("Length", fXML.size()); + dict.emitObject(stream); + static const char streamBegin[] = " stream\n"; + stream->writeText(streamBegin); + // Do not compress this. The standard requires that a + // program that does not understand PDF can grep for + // "write(fXML.c_str(), fXML.size()); + static const char streamEnd[] = "\nendstream"; + stream->writeText(streamEnd); + } + +private: + const SkString fXML; +}; +} // namespace + +static int count_xml_escape_size(const SkString& input) { + int extra = 0; + for (size_t i = 0; i < input.size(); ++i) { + if (input[i] == '&') { + extra += 4; // strlen("&") - strlen("&") + } else if (input[i] == '<') { + extra += 3; // strlen("<") - strlen("<") + } + } + return extra; +} + +SkString escape_xml(const SkString& input, + const char* before = nullptr, + const char* after = nullptr) { + if (input.size() == 0) { + return input; + } + // "&" --> "&" and "<" --> "<" + // text is assumed to be in UTF-8 + // all strings are xml content, not attribute values. + size_t beforeLen = before ? strlen(before) : 0; + size_t afterLen = after ? strlen(after) : 0; + int extra = count_xml_escape_size(input); + SkString output(input.size() + extra + beforeLen + afterLen); + char* out = output.data(); + if (before) { + strncpy(out, before, beforeLen); + out += beforeLen; + } + static const char kAmp[] = "&"; + static const char kLt[] = "<"; + for (size_t i = 0; i < input.size(); ++i) { + if (input[i] == '&') { + memcpy(out, kAmp, strlen(kAmp)); + out += strlen(kAmp); + } else if (input[i] == '<') { + memcpy(out, kLt, strlen(kLt)); + out += strlen(kLt); + } else { + *out++ = input[i]; + } + } + if (after) { + strncpy(out, after, afterLen); + out += afterLen; + } + // Validate that we haven't written outside of our string. + SkASSERT(out == &output.data()[output.size()]); + *out = '\0'; + return output; +} + +SkPDFIndirectReference SkPDFMetadata::MakeXMPObject( + const SkPDF::Metadata& metadata, + const SkUUID& doc, + const SkUUID& instance, + SkPDFDocument* docPtr) { + static const char templateString[] = + "\n" + "\n" + "\n" + "\n" + "2\n" + "B\n" + "%s" // ModifyDate + "%s" // CreateDate + "%s" // xmp:CreatorTool + "application/pdf\n" + "%s" // dc:title + "%s" // dc:description + "%s" // author + "%s" // keywords + "uuid:%s\n" + "uuid:%s\n" + "%s" // pdf:Producer + "%s" // pdf:Keywords + "\n" + "\n" + "\n" // Note: the standard suggests 4k of padding. + "\n"; + + SkString creationDate; + SkString modificationDate; + if (metadata.fCreation != kZeroTime) { + SkString tmp; + metadata.fCreation.toISO8601(&tmp); + SkASSERT(0 == count_xml_escape_size(tmp)); + // YYYY-mm-ddTHH:MM:SS[+|-]ZZ:ZZ; no need to escape + creationDate = SkStringPrintf("%s\n", + tmp.c_str()); + } + if (metadata.fModified != kZeroTime) { + SkString tmp; + metadata.fModified.toISO8601(&tmp); + SkASSERT(0 == count_xml_escape_size(tmp)); + modificationDate = SkStringPrintf( + "%s\n", tmp.c_str()); + } + SkString title = + escape_xml(metadata.fTitle, + "", + "\n"); + SkString author = + escape_xml(metadata.fAuthor, "", + "\n"); + // TODO: in theory, XMP can support multiple authors. Split on a delimiter? + SkString subject = escape_xml( + metadata.fSubject, + "", + "\n"); + SkString keywords1 = + escape_xml(metadata.fKeywords, "", + "\n"); + SkString keywords2 = escape_xml(metadata.fKeywords, "", + "\n"); + // TODO: in theory, keywords can be a list too. + + SkString producer = escape_xml(metadata.fProducer, "", "\n"); + + SkString creator = escape_xml(metadata.fCreator, "", + "\n"); + SkString documentID = uuid_to_string(doc); // no need to escape + SkASSERT(0 == count_xml_escape_size(documentID)); + SkString instanceID = uuid_to_string(instance); + SkASSERT(0 == count_xml_escape_size(instanceID)); + + + auto value = SkStringPrintf( + templateString, modificationDate.c_str(), creationDate.c_str(), + creator.c_str(), title.c_str(), subject.c_str(), author.c_str(), + keywords1.c_str(), documentID.c_str(), instanceID.c_str(), + producer.c_str(), keywords2.c_str()); + + std::unique_ptr dict = SkPDFMakeDict("Metadata"); + dict->insertName("Subtype", "XML"); + return SkPDFStreamOut(std::move(dict), + SkMemoryStream::MakeCopy(value.c_str(), value.size()), + docPtr, SkPDFSteamCompressionEnabled::No); +} + +#undef SKPDF_CUSTOM_PRODUCER_KEY +#undef SKPDF_PRODUCER +#undef SKPDF_STRING +#undef SKPDF_STRING_IMPL diff --git a/gfx/skia/skia/src/pdf/SkPDFMetadata.h b/gfx/skia/skia/src/pdf/SkPDFMetadata.h new file mode 100644 index 0000000000..d9df0aeff2 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFMetadata.h @@ -0,0 +1,29 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPDFMetadata_DEFINED +#define SkPDFMetadata_DEFINED + +#include "include/docs/SkPDFDocument.h" +#include "src/pdf/SkPDFTypes.h" +#include "src/pdf/SkUUID.h" + +class SkPDFObject; + +namespace SkPDFMetadata { +std::unique_ptr MakeDocumentInformationDict(const SkPDF::Metadata&); + +SkUUID CreateUUID(const SkPDF::Metadata&); + +std::unique_ptr MakePdfId(const SkUUID& doc, const SkUUID& instance); + +SkPDFIndirectReference MakeXMPObject(const SkPDF::Metadata& metadata, + const SkUUID& doc, + const SkUUID& instance, + SkPDFDocument*); +} // namespace SkPDFMetadata +#endif // SkPDFMetadata_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFResourceDict.cpp b/gfx/skia/skia/src/pdf/SkPDFResourceDict.cpp new file mode 100644 index 0000000000..a4eeed3029 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFResourceDict.cpp @@ -0,0 +1,96 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "src/pdf/SkPDFResourceDict.h" +#include "src/pdf/SkPDFTypes.h" + +// Verify that the values of enum ResourceType correspond to the expected values +// as defined in the arrays below. +// If these are failing, you may need to update the kResourceTypePrefixes +// and kResourceTypeNames arrays below. +static_assert(0 == (int)SkPDFResourceType::kExtGState, "resource_type_mismatch"); +static_assert(1 == (int)SkPDFResourceType::kPattern, "resource_type_mismatch"); +static_assert(2 == (int)SkPDFResourceType::kXObject, "resource_type_mismatch"); +static_assert(3 == (int)SkPDFResourceType::kFont, "resource_type_mismatch"); + +// One extra character for the Prefix. +constexpr size_t kMaxResourceNameLength = 1 + kSkStrAppendS32_MaxSize; + +// returns pointer just past end of what's written into `dst`. +static char* get_resource_name(char dst[kMaxResourceNameLength], SkPDFResourceType type, int key) { + static const char kResourceTypePrefixes[] = { + 'G', // kExtGState + 'P', // kPattern + 'X', // kXObject + 'F' // kFont + }; + SkASSERT((unsigned)type < std::size(kResourceTypePrefixes)); + dst[0] = kResourceTypePrefixes[(unsigned)type]; + return SkStrAppendS32(dst + 1, key); +} + +void SkPDFWriteResourceName(SkWStream* dst, SkPDFResourceType type, int key) { + // One extra character for the leading '/'. + char buffer[1 + kMaxResourceNameLength]; + buffer[0] = '/'; + char* end = get_resource_name(buffer + 1, type, key); + dst->write(buffer, (size_t)(end - buffer)); +} + +static const char* resource_name(SkPDFResourceType type) { + static const char* kResourceTypeNames[] = { + "ExtGState", + "Pattern", + "XObject", + "Font" + }; + SkASSERT((unsigned)type < std::size(kResourceTypeNames)); + return kResourceTypeNames[(unsigned)type]; +} + +static SkString resource(SkPDFResourceType type, int index) { + char buffer[kMaxResourceNameLength]; + char* end = get_resource_name(buffer, type, index); + return SkString(buffer, (size_t)(end - buffer)); +} + +static void add_subdict(const std::vector& resourceList, + SkPDFResourceType type, + SkPDFDict* dst) { + if (!resourceList.empty()) { + auto resources = SkPDFMakeDict(); + for (SkPDFIndirectReference ref : resourceList) { + resources->insertRef(resource(type, ref.fValue), ref); + } + dst->insertObject(resource_name(type), std::move(resources)); + } +} + +static std::unique_ptr make_proc_set() { + auto procSets = SkPDFMakeArray(); + static const char kProcs[][7] = { "PDF", "Text", "ImageB", "ImageC", "ImageI"}; + procSets->reserve(std::size(kProcs)); + for (const char* proc : kProcs) { + procSets->appendName(proc); + } + return procSets; +} + +std::unique_ptr SkPDFMakeResourceDict( + const std::vector& graphicStateResources, + const std::vector& shaderResources, + const std::vector& xObjectResources, + const std::vector& fontResources) { + auto dict = SkPDFMakeDict(); + dict->insertObject("ProcSet", make_proc_set()); + add_subdict(graphicStateResources, SkPDFResourceType::kExtGState, dict.get()); + add_subdict(shaderResources, SkPDFResourceType::kPattern, dict.get()); + add_subdict(xObjectResources, SkPDFResourceType::kXObject, dict.get()); + add_subdict(fontResources, SkPDFResourceType::kFont, dict.get()); + return dict; +} diff --git a/gfx/skia/skia/src/pdf/SkPDFResourceDict.h b/gfx/skia/skia/src/pdf/SkPDFResourceDict.h new file mode 100644 index 0000000000..4cd9dfa1c3 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFResourceDict.h @@ -0,0 +1,50 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPDFResourceDict_DEFINED +#define SkPDFResourceDict_DEFINED + +#include "src/pdf/SkPDFFont.h" + +#include + +class SkPDFDict; +class SkPDFObject; +class SkWStream; + +enum class SkPDFResourceType { + kExtGState = 0, + kPattern = 1, + kXObject = 2, + kFont = 3, + // These additional types are defined by the spec, but not + // currently used by Skia: ColorSpace, Shading, Properties +}; + + +/** Create a PDF resource dictionary. + * The full set of ProcSet entries is automatically created for backwards + * compatibility, as recommended by the PDF spec. + * + * Any arguments can be nullptr. + */ +std::unique_ptr SkPDFMakeResourceDict( + const std::vector& graphicStateResources, + const std::vector& shaderResources, + const std::vector& xObjectResources, + const std::vector& fontResources); + +/** + * Writes the name for the resource that will be generated by the resource + * dict. + * + * @param type The type of resource being entered + * @param key The resource key, should be unique within its type. + */ +void SkPDFWriteResourceName(SkWStream*, SkPDFResourceType type, int key); + +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFShader.cpp b/gfx/skia/skia/src/pdf/SkPDFShader.cpp new file mode 100644 index 0000000000..cbaa32e524 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFShader.cpp @@ -0,0 +1,367 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFShader.h" + +#include "include/core/SkData.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStream.h" +#include "include/core/SkSurface.h" +#include "include/docs/SkPDFDocument.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "src/pdf/SkPDFDevice.h" +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFFormXObject.h" +#include "src/pdf/SkPDFGradientShader.h" +#include "src/pdf/SkPDFGraphicState.h" +#include "src/pdf/SkPDFResourceDict.h" +#include "src/pdf/SkPDFUtils.h" + +static void draw(SkCanvas* canvas, const SkImage* image, SkColor4f paintColor) { + SkPaint paint(paintColor); + canvas->drawImage(image, 0, 0, SkSamplingOptions(), &paint); +} + +static SkBitmap to_bitmap(const SkImage* image) { + SkBitmap bitmap; + if (!SkPDFUtils::ToBitmap(image, &bitmap)) { + bitmap.allocN32Pixels(image->width(), image->height()); + bitmap.eraseColor(0x00000000); + } + return bitmap; +} + +static void draw_matrix(SkCanvas* canvas, const SkImage* image, + const SkMatrix& matrix, SkColor4f paintColor) { + SkAutoCanvasRestore acr(canvas, true); + canvas->concat(matrix); + draw(canvas, image, paintColor); +} + +static void draw_bitmap_matrix(SkCanvas* canvas, const SkBitmap& bm, + const SkMatrix& matrix, SkColor4f paintColor) { + SkAutoCanvasRestore acr(canvas, true); + canvas->concat(matrix); + SkPaint paint(paintColor); + canvas->drawImage(bm.asImage(), 0, 0, SkSamplingOptions(), &paint); +} + +static void fill_color_from_bitmap(SkCanvas* canvas, + float left, float top, float right, float bottom, + const SkBitmap& bitmap, int x, int y, float alpha) { + SkRect rect{left, top, right, bottom}; + if (!rect.isEmpty()) { + SkColor4f color = SkColor4f::FromColor(bitmap.getColor(x, y)); + SkPaint paint(SkColor4f{color.fR, color.fG, color.fB, alpha * color.fA}); + canvas->drawRect(rect, paint); + } +} + +static SkMatrix scale_translate(SkScalar sx, SkScalar sy, SkScalar tx, SkScalar ty) { + SkMatrix m; + m.setScaleTranslate(sx, sy, tx, ty); + return m; +} + +static bool is_tiled(SkTileMode m) { return SkTileMode::kMirror == m || SkTileMode::kRepeat == m; } + +static SkPDFIndirectReference make_image_shader(SkPDFDocument* doc, + SkMatrix finalMatrix, + SkTileMode tileModesX, + SkTileMode tileModesY, + SkRect bBox, + const SkImage* image, + SkColor4f paintColor) { + // The image shader pattern cell will be drawn into a separate device + // in pattern cell space (no scaling on the bitmap, though there may be + // translations so that all content is in the device, coordinates > 0). + + // Map clip bounds to shader space to ensure the device is large enough + // to handle fake clamping. + + SkRect deviceBounds = bBox; + if (!SkPDFUtils::InverseTransformBBox(finalMatrix, &deviceBounds)) { + return SkPDFIndirectReference(); + } + + SkRect bitmapBounds = SkRect::MakeSize(SkSize::Make(image->dimensions())); + + // For tiling modes, the bounds should be extended to include the bitmap, + // otherwise the bitmap gets clipped out and the shader is empty and awful. + // For clamp modes, we're only interested in the clip region, whether + // or not the main bitmap is in it. + if (is_tiled(tileModesX) || is_tiled(tileModesY)) { + deviceBounds.join(bitmapBounds); + } + + SkISize patternDeviceSize = {SkScalarCeilToInt(deviceBounds.width()), + SkScalarCeilToInt(deviceBounds.height())}; + auto patternDevice = sk_make_sp(patternDeviceSize, doc); + SkCanvas canvas(patternDevice); + + SkRect patternBBox = SkRect::MakeSize(SkSize::Make(image->dimensions())); + SkScalar width = patternBBox.width(); + SkScalar height = patternBBox.height(); + + // Translate the canvas so that the bitmap origin is at (0, 0). + canvas.translate(-deviceBounds.left(), -deviceBounds.top()); + patternBBox.offset(-deviceBounds.left(), -deviceBounds.top()); + // Undo the translation in the final matrix + finalMatrix.preTranslate(deviceBounds.left(), deviceBounds.top()); + + // If the bitmap is out of bounds (i.e. clamp mode where we only see the + // stretched sides), canvas will clip this out and the extraneous data + // won't be saved to the PDF. + draw(&canvas, image, paintColor); + + // Tiling is implied. First we handle mirroring. + if (tileModesX == SkTileMode::kMirror) { + draw_matrix(&canvas, image, scale_translate(-1, 1, 2 * width, 0), paintColor); + patternBBox.fRight += width; + } + if (tileModesY == SkTileMode::kMirror) { + draw_matrix(&canvas, image, scale_translate(1, -1, 0, 2 * height), paintColor); + patternBBox.fBottom += height; + } + if (tileModesX == SkTileMode::kMirror && tileModesY == SkTileMode::kMirror) { + draw_matrix(&canvas, image, scale_translate(-1, -1, 2 * width, 2 * height), paintColor); + } + + // Then handle Clamping, which requires expanding the pattern canvas to + // cover the entire surfaceBBox. + + SkBitmap bitmap; + if (tileModesX == SkTileMode::kClamp || tileModesY == SkTileMode::kClamp) { + // For now, the easiest way to access the colors in the corners and sides is + // to just make a bitmap from the image. + bitmap = to_bitmap(image); + } + + // If both x and y are in clamp mode, we start by filling in the corners. + // (Which are just a rectangles of the corner colors.) + if (tileModesX == SkTileMode::kClamp && tileModesY == SkTileMode::kClamp) { + SkASSERT(!bitmap.drawsNothing()); + + fill_color_from_bitmap(&canvas, deviceBounds.left(), deviceBounds.top(), 0, 0, + bitmap, 0, 0, paintColor.fA); + + fill_color_from_bitmap(&canvas, width, deviceBounds.top(), deviceBounds.right(), 0, + bitmap, bitmap.width() - 1, 0, paintColor.fA); + + fill_color_from_bitmap(&canvas, width, height, deviceBounds.right(), deviceBounds.bottom(), + bitmap, bitmap.width() - 1, bitmap.height() - 1, paintColor.fA); + + fill_color_from_bitmap(&canvas, deviceBounds.left(), height, 0, deviceBounds.bottom(), + bitmap, 0, bitmap.height() - 1, paintColor.fA); + } + + // Then expand the left, right, top, then bottom. + if (tileModesX == SkTileMode::kClamp) { + SkASSERT(!bitmap.drawsNothing()); + SkIRect subset = SkIRect::MakeXYWH(0, 0, 1, bitmap.height()); + if (deviceBounds.left() < 0) { + SkBitmap left; + SkAssertResult(bitmap.extractSubset(&left, subset)); + + SkMatrix leftMatrix = scale_translate(-deviceBounds.left(), 1, deviceBounds.left(), 0); + draw_bitmap_matrix(&canvas, left, leftMatrix, paintColor); + + if (tileModesY == SkTileMode::kMirror) { + leftMatrix.postScale(SK_Scalar1, -SK_Scalar1); + leftMatrix.postTranslate(0, 2 * height); + draw_bitmap_matrix(&canvas, left, leftMatrix, paintColor); + } + patternBBox.fLeft = 0; + } + + if (deviceBounds.right() > width) { + SkBitmap right; + subset.offset(bitmap.width() - 1, 0); + SkAssertResult(bitmap.extractSubset(&right, subset)); + + SkMatrix rightMatrix = scale_translate(deviceBounds.right() - width, 1, width, 0); + draw_bitmap_matrix(&canvas, right, rightMatrix, paintColor); + + if (tileModesY == SkTileMode::kMirror) { + rightMatrix.postScale(SK_Scalar1, -SK_Scalar1); + rightMatrix.postTranslate(0, 2 * height); + draw_bitmap_matrix(&canvas, right, rightMatrix, paintColor); + } + patternBBox.fRight = deviceBounds.width(); + } + } + if (tileModesX == SkTileMode::kDecal) { + if (deviceBounds.left() < 0) { + patternBBox.fLeft = 0; + } + if (deviceBounds.right() > width) { + patternBBox.fRight = deviceBounds.width(); + } + } + + if (tileModesY == SkTileMode::kClamp) { + SkASSERT(!bitmap.drawsNothing()); + SkIRect subset = SkIRect::MakeXYWH(0, 0, bitmap.width(), 1); + if (deviceBounds.top() < 0) { + SkBitmap top; + SkAssertResult(bitmap.extractSubset(&top, subset)); + + SkMatrix topMatrix = scale_translate(1, -deviceBounds.top(), 0, deviceBounds.top()); + draw_bitmap_matrix(&canvas, top, topMatrix, paintColor); + + if (tileModesX == SkTileMode::kMirror) { + topMatrix.postScale(-1, 1); + topMatrix.postTranslate(2 * width, 0); + draw_bitmap_matrix(&canvas, top, topMatrix, paintColor); + } + patternBBox.fTop = 0; + } + + if (deviceBounds.bottom() > height) { + SkBitmap bottom; + subset.offset(0, bitmap.height() - 1); + SkAssertResult(bitmap.extractSubset(&bottom, subset)); + + SkMatrix bottomMatrix = scale_translate(1, deviceBounds.bottom() - height, 0, height); + draw_bitmap_matrix(&canvas, bottom, bottomMatrix, paintColor); + + if (tileModesX == SkTileMode::kMirror) { + bottomMatrix.postScale(-1, 1); + bottomMatrix.postTranslate(2 * width, 0); + draw_bitmap_matrix(&canvas, bottom, bottomMatrix, paintColor); + } + patternBBox.fBottom = deviceBounds.height(); + } + } + if (tileModesY == SkTileMode::kDecal) { + if (deviceBounds.top() < 0) { + patternBBox.fTop = 0; + } + if (deviceBounds.bottom() > height) { + patternBBox.fBottom = deviceBounds.height(); + } + } + + auto imageShader = patternDevice->content(); + std::unique_ptr resourceDict = patternDevice->makeResourceDict(); + std::unique_ptr dict = SkPDFMakeDict(); + SkPDFUtils::PopulateTilingPatternDict(dict.get(), patternBBox, + std::move(resourceDict), finalMatrix); + return SkPDFStreamOut(std::move(dict), std::move(imageShader), doc); +} + +// Generic fallback for unsupported shaders: +// * allocate a surfaceBBox-sized bitmap +// * shade the whole area +// * use the result as a bitmap shader +static SkPDFIndirectReference make_fallback_shader(SkPDFDocument* doc, + SkShader* shader, + const SkMatrix& canvasTransform, + const SkIRect& surfaceBBox, + SkColor4f paintColor) { + // surfaceBBox is in device space. While that's exactly what we + // want for sizing our bitmap, we need to map it into + // shader space for adjustments (to match + // MakeImageShader's behavior). + SkRect shaderRect = SkRect::Make(surfaceBBox); + if (!SkPDFUtils::InverseTransformBBox(canvasTransform, &shaderRect)) { + return SkPDFIndirectReference(); + } + // Clamp the bitmap size to about 1M pixels + static const int kMaxBitmapArea = 1024 * 1024; + SkScalar bitmapArea = (float)surfaceBBox.width() * (float)surfaceBBox.height(); + SkScalar rasterScale = 1.0f; + if (bitmapArea > (float)kMaxBitmapArea) { + rasterScale *= SkScalarSqrt((float)kMaxBitmapArea / bitmapArea); + } + + SkISize size = { + SkTPin(SkScalarCeilToInt(rasterScale * surfaceBBox.width()), 1, kMaxBitmapArea), + SkTPin(SkScalarCeilToInt(rasterScale * surfaceBBox.height()), 1, kMaxBitmapArea)}; + SkSize scale = {SkIntToScalar(size.width()) / shaderRect.width(), + SkIntToScalar(size.height()) / shaderRect.height()}; + + auto surface = SkSurface::MakeRasterN32Premul(size.width(), size.height()); + SkASSERT(surface); + SkCanvas* canvas = surface->getCanvas(); + canvas->clear(SK_ColorTRANSPARENT); + + SkPaint p(paintColor); + p.setShader(sk_ref_sp(shader)); + + canvas->scale(scale.width(), scale.height()); + canvas->translate(-shaderRect.x(), -shaderRect.y()); + canvas->drawPaint(p); + + auto shaderTransform = SkMatrix::Translate(shaderRect.x(), shaderRect.y()); + shaderTransform.preScale(1 / scale.width(), 1 / scale.height()); + + sk_sp image = surface->makeImageSnapshot(); + SkASSERT(image); + return make_image_shader(doc, + SkMatrix::Concat(canvasTransform, shaderTransform), + SkTileMode::kClamp, SkTileMode::kClamp, + SkRect::Make(surfaceBBox), + image.get(), + paintColor); +} + +static SkColor4f adjust_color(SkShader* shader, SkColor4f paintColor) { + if (SkImage* img = shader->isAImage(nullptr, (SkTileMode*)nullptr)) { + if (img->isAlphaOnly()) { + return paintColor; + } + } + return SkColor4f{0, 0, 0, paintColor.fA}; // only preserve the alpha. +} + +SkPDFIndirectReference SkPDFMakeShader(SkPDFDocument* doc, + SkShader* shader, + const SkMatrix& canvasTransform, + const SkIRect& surfaceBBox, + SkColor4f paintColor) { + SkASSERT(shader); + SkASSERT(doc); + if (as_SB(shader)->asGradient() != SkShaderBase::GradientType::kNone) { + return SkPDFGradientShader::Make(doc, shader, canvasTransform, surfaceBBox); + } + if (surfaceBBox.isEmpty()) { + return SkPDFIndirectReference(); + } + SkBitmap image; + + paintColor = adjust_color(shader, paintColor); + SkMatrix shaderTransform; + SkTileMode imageTileModes[2]; + if (SkImage* skimg = shader->isAImage(&shaderTransform, imageTileModes)) { + SkMatrix finalMatrix = SkMatrix::Concat(canvasTransform, shaderTransform); + SkPDFImageShaderKey key = { + finalMatrix, + surfaceBBox, + SkBitmapKeyFromImage(skimg), + {imageTileModes[0], imageTileModes[1]}, + paintColor}; + SkPDFIndirectReference* shaderPtr = doc->fImageShaderMap.find(key); + if (shaderPtr) { + return *shaderPtr; + } + SkPDFIndirectReference pdfShader = + make_image_shader(doc, + finalMatrix, + imageTileModes[0], + imageTileModes[1], + SkRect::Make(surfaceBBox), + skimg, + paintColor); + doc->fImageShaderMap.set(std::move(key), pdfShader); + return pdfShader; + } + // Don't bother to de-dup fallback shader. + return make_fallback_shader(doc, shader, canvasTransform, surfaceBBox, paintColor); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFShader.h b/gfx/skia/skia/src/pdf/SkPDFShader.h new file mode 100644 index 0000000000..a771734719 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFShader.h @@ -0,0 +1,67 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + + +#ifndef SkPDFShader_DEFINED +#define SkPDFShader_DEFINED + +#include "include/core/SkShader.h" +#include "include/private/base/SkMacros.h" +#include "src/pdf/SkBitmapKey.h" +#include "src/pdf/SkPDFTypes.h" + + +class SkPDFDocument; +class SkMatrix; +struct SkIRect; + +/** Make a PDF shader for the passed SkShader. If the SkShader is invalid in + * some way, returns nullptr. + * + * In PDF parlance, this is a pattern, used in place of a color when the + * pattern color space is selected. + * + * May cache the shader in the document for later re-use. If this function is + * called again with an equivalent shader, a new reference to the cached pdf + * shader may be returned. + * + * @param doc The parent document, must be non-null. + * @param shader The SkShader to emulate. + * @param ctm The current transform matrix. (PDF shaders are absolutely + * positioned, relative to where the page is drawn.) + * @param surfaceBBox The bounding box of the drawing surface (with matrix + * already applied). + * @param paintColor Color+Alpha of the paint. Color is usually ignored, + * unless it is a alpha shader. + */ +SkPDFIndirectReference SkPDFMakeShader(SkPDFDocument* doc, + SkShader* shader, + const SkMatrix& ctm, + const SkIRect& surfaceBBox, + SkColor4f paintColor); + +SK_BEGIN_REQUIRE_DENSE +struct SkPDFImageShaderKey { + SkMatrix fTransform; + SkIRect fBBox; + SkBitmapKey fBitmapKey; + SkTileMode fImageTileModes[2]; + SkColor4f fPaintColor; +}; +SK_END_REQUIRE_DENSE + +inline bool operator==(const SkPDFImageShaderKey& a, const SkPDFImageShaderKey& b) { + SkASSERT(a.fBitmapKey.fID != 0); + SkASSERT(b.fBitmapKey.fID != 0); + return a.fTransform == b.fTransform + && a.fBBox == b.fBBox + && a.fBitmapKey == b.fBitmapKey + && a.fImageTileModes[0] == b.fImageTileModes[0] + && a.fImageTileModes[1] == b.fImageTileModes[1] + && a.fPaintColor == b.fPaintColor; +} +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFSubsetFont.cpp b/gfx/skia/skia/src/pdf/SkPDFSubsetFont.cpp new file mode 100644 index 0000000000..0a729bef50 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFSubsetFont.cpp @@ -0,0 +1,208 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#include "src/pdf/SkPDFSubsetFont.h" + +#if defined(SK_PDF_USE_HARFBUZZ_SUBSET) + +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/utils/SkCallableTraits.h" + +#include "hb.h" +#include "hb-subset.h" + +using HBBlob = std::unique_ptr>; +using HBFace = std::unique_ptr>; +using HBSubsetInput = std::unique_ptr>; +using HBSet = std::unique_ptr>; + +static HBBlob to_blob(sk_sp data) { + using blob_size_t = SkCallableTraits::argument<1>::type; + if (!SkTFitsIn(data->size())) { + return nullptr; + } + const char* blobData = static_cast(data->data()); + blob_size_t blobSize = SkTo(data->size()); + return HBBlob(hb_blob_create(blobData, blobSize, + HB_MEMORY_MODE_READONLY, + data.release(), [](void* p){ ((SkData*)p)->unref(); })); +} + +static sk_sp to_data(HBBlob blob) { + if (!blob) { + return nullptr; + } + unsigned int length; + const char* data = hb_blob_get_data(blob.get(), &length); + if (!data || !length) { + return nullptr; + } + return SkData::MakeWithProc(data, SkToSizeT(length), + [](const void*, void* ctx) { hb_blob_destroy((hb_blob_t*)ctx); }, + blob.release()); +} + +template using void_t = void; +template +struct SkPDFHarfBuzzSubset { + // This is the HarfBuzz 3.0 interface. + // hb_subset_flags_t does not exist in 2.0. It isn't dependent on T, so inline the value of + // HB_SUBSET_FLAGS_RETAIN_GIDS until 2.0 is no longer supported. + static HBFace Make(T input, hb_face_t* face, bool retainZeroGlyph) { + // TODO: When possible, check if a font is 'tricky' with FT_IS_TRICKY. + // If it isn't known if a font is 'tricky', retain the hints. + unsigned int flags = 0x2u/*HB_SUBSET_FLAGS_RETAIN_GIDS*/; + if (retainZeroGlyph) { + flags |= 0x40u/*HB_SUBSET_FLAGS_NOTDEF_OUTLINE*/; + } + hb_subset_input_set_flags(input, flags); + return HBFace(hb_subset_or_fail(face, input)); + } +}; +template +struct SkPDFHarfBuzzSubset(), std::declval())), + decltype(hb_subset_input_set_drop_hints(std::declval(), std::declval())), + decltype(hb_subset(std::declval(), std::declval())) + >> +{ + // This is the HarfBuzz 2.0 (non-public) interface, used if it exists. + // This code should be removed as soon as all users are migrated to the newer API. + static HBFace Make(T input, hb_face_t* face, bool) { + hb_subset_input_set_retain_gids(input, true); + // TODO: When possible, check if a font is 'tricky' with FT_IS_TRICKY. + // If it isn't known if a font is 'tricky', retain the hints. + hb_subset_input_set_drop_hints(input, false); + return HBFace(hb_subset(face, input)); + } +}; + +static sk_sp subset_harfbuzz(sk_sp fontData, + const SkPDFGlyphUse& glyphUsage, + int ttcIndex) { + if (!fontData) { + return nullptr; + } + HBFace face(hb_face_create(to_blob(std::move(fontData)).get(), ttcIndex)); + SkASSERT(face); + + HBSubsetInput input(hb_subset_input_create_or_fail()); + SkASSERT(input); + if (!face || !input) { + return nullptr; + } + hb_set_t* glyphs = hb_subset_input_glyph_set(input.get()); + glyphUsage.getSetValues([&glyphs](unsigned gid) { hb_set_add(glyphs, gid);}); + + HBFace subset = SkPDFHarfBuzzSubset::Make(input.get(), face.get(), + glyphUsage.has(0)); + if (!subset) { + return nullptr; + } + HBBlob result(hb_face_reference_blob(subset.get())); + return to_data(std::move(result)); +} + +#endif // defined(SK_PDF_USE_HARFBUZZ_SUBSET) + +//////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_PDF_USE_SFNTLY) + +#include "sample/chromium/font_subsetter.h" +#include + +#if defined(SK_USING_THIRD_PARTY_ICU) +#include "third_party/icu/SkLoadICU.h" +#endif + +static sk_sp subset_sfntly(sk_sp fontData, + const SkPDFGlyphUse& glyphUsage, + const char* fontName, + int ttcIndex) { +#if defined(SK_USING_THIRD_PARTY_ICU) + if (!SkLoadICU()) { + return nullptr; + } +#endif + // Generate glyph id array in format needed by sfntly. + // TODO(halcanary): sfntly should take a more compact format. + std::vector subset; + glyphUsage.getSetValues([&subset](unsigned v) { subset.push_back(v); }); + + unsigned char* subsetFont{nullptr}; +#if defined(SK_BUILD_FOR_GOOGLE3) + // TODO(halcanary): update SK_BUILD_FOR_GOOGLE3 to newest version of Sfntly. + (void)ttcIndex; + int subsetFontSize = SfntlyWrapper::SubsetFont(fontName, + fontData->bytes(), + fontData->size(), + subset.data(), + subset.size(), + &subsetFont); +#else // defined(SK_BUILD_FOR_GOOGLE3) + (void)fontName; + int subsetFontSize = SfntlyWrapper::SubsetFont(ttcIndex, + fontData->bytes(), + fontData->size(), + subset.data(), + subset.size(), + &subsetFont); +#endif // defined(SK_BUILD_FOR_GOOGLE3) + SkASSERT(subsetFontSize > 0 || subsetFont == nullptr); + if (subsetFontSize < 1 || subsetFont == nullptr) { + return nullptr; + } + return SkData::MakeWithProc(subsetFont, subsetFontSize, + [](const void* p, void*) { delete[] (unsigned char*)p; }, + nullptr); +} + +#endif // defined(SK_PDF_USE_SFNTLY) + +//////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_PDF_USE_SFNTLY) && defined(SK_PDF_USE_HARFBUZZ_SUBSET) + +sk_sp SkPDFSubsetFont(sk_sp fontData, + const SkPDFGlyphUse& glyphUsage, + SkPDF::Metadata::Subsetter subsetter, + const char* fontName, + int ttcIndex) { + switch (subsetter) { + case SkPDF::Metadata::kHarfbuzz_Subsetter: + return subset_harfbuzz(std::move(fontData), glyphUsage, ttcIndex); + case SkPDF::Metadata::kSfntly_Subsetter: + return subset_sfntly(std::move(fontData), glyphUsage, fontName, ttcIndex); + } + return nullptr; +} + +#elif defined(SK_PDF_USE_SFNTLY) + +sk_sp SkPDFSubsetFont(sk_sp fontData, + const SkPDFGlyphUse& glyphUsage, + SkPDF::Metadata::Subsetter, + const char* fontName, + int ttcIndex) { + return subset_sfntly(std::move(fontData), glyphUsage, fontName, ttcIndex); +} + +#elif defined(SK_PDF_USE_HARFBUZZ_SUBSET) + +sk_sp SkPDFSubsetFont(sk_sp fontData, + const SkPDFGlyphUse& glyphUsage, + SkPDF::Metadata::Subsetter, + const char*, + int ttcIndex) { + return subset_harfbuzz(std::move(fontData), glyphUsage, ttcIndex); +} + +#else + +sk_sp SkPDFSubsetFont(sk_sp, const SkPDFGlyphUse&, SkPDF::Metadata::Subsetter, + const char*, int) { + return nullptr; +} +#endif // defined(SK_PDF_USE_SFNTLY) diff --git a/gfx/skia/skia/src/pdf/SkPDFSubsetFont.h b/gfx/skia/skia/src/pdf/SkPDFSubsetFont.h new file mode 100644 index 0000000000..b812c52ff5 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFSubsetFont.h @@ -0,0 +1,16 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkPDFSubsetFont_DEFINED +#define SkPDFSubsetFont_DEFINED + +#include "include/core/SkData.h" +#include "include/docs/SkPDFDocument.h" +#include "src/pdf/SkPDFGlyphUse.h" + +sk_sp SkPDFSubsetFont(sk_sp fontData, + const SkPDFGlyphUse& glyphUsage, + SkPDF::Metadata::Subsetter subsetter, + const char* fontName, + int ttcIndex); + +#endif // SkPDFSubsetFont_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFTag.cpp b/gfx/skia/skia/src/pdf/SkPDFTag.cpp new file mode 100644 index 0000000000..fcfb701477 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFTag.cpp @@ -0,0 +1,372 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFTag.h" + +// The struct parent tree consists of one entry per page, followed by +// entries for individual struct tree nodes corresponding to +// annotations. Each entry is a key/value pair with an integer key +// and an indirect reference key. +// +// The page entries get consecutive keys starting at 0. Since we don't +// know the total number of pages in the document at the time we start +// processing annotations, start the key for annotations with a large +// number, which effectively becomes the maximum number of pages in a +// PDF we can handle. +const int kFirstAnnotationStructParentKey = 100000; + +struct SkPDFTagNode { + // Structure element nodes need a unique alphanumeric ID, + // and we need to be able to output them sorted in lexicographic + // order. This helper function takes one of our node IDs and + // builds an ID string that zero-pads the digits so that lexicographic + // order matches numeric order. + static SkString nodeIdToString(int nodeId) { + SkString idString; + idString.printf("node%08d", nodeId); + return idString; + } + + SkPDFTagNode* fChildren = nullptr; + size_t fChildCount = 0; + struct MarkedContentInfo { + unsigned fPageIndex; + int fMarkId; + }; + SkTArray fMarkedContent; + int fNodeId; + SkString fTypeString; + SkString fAlt; + SkString fLang; + SkPDFIndirectReference fRef; + enum State { + kUnknown, + kYes, + kNo, + } fCanDiscard = kUnknown; + std::unique_ptr fAttributes; + struct AnnotationInfo { + unsigned fPageIndex; + SkPDFIndirectReference fAnnotationRef; + }; + std::vector fAnnotations; +}; + +SkPDF::AttributeList::AttributeList() = default; + +SkPDF::AttributeList::~AttributeList() = default; + +void SkPDF::AttributeList::appendInt( + const char* owner, const char* name, int value) { + if (!fAttrs) + fAttrs = SkPDFMakeArray(); + std::unique_ptr attrDict = SkPDFMakeDict(); + attrDict->insertName("O", owner); + attrDict->insertInt(name, value); + fAttrs->appendObject(std::move(attrDict)); +} + +void SkPDF::AttributeList::appendFloat( + const char* owner, const char* name, float value) { + if (!fAttrs) + fAttrs = SkPDFMakeArray(); + std::unique_ptr attrDict = SkPDFMakeDict(); + attrDict->insertName("O", owner); + attrDict->insertScalar(name, value); + fAttrs->appendObject(std::move(attrDict)); +} + +void SkPDF::AttributeList::appendName( + const char* owner, const char* name, const char* value) { + if (!fAttrs) + fAttrs = SkPDFMakeArray(); + std::unique_ptr attrDict = SkPDFMakeDict(); + attrDict->insertName("O", owner); + attrDict->insertName(name, value); + fAttrs->appendObject(std::move(attrDict)); +} + +void SkPDF::AttributeList::appendFloatArray( + const char* owner, const char* name, const std::vector& value) { + if (!fAttrs) + fAttrs = SkPDFMakeArray(); + std::unique_ptr attrDict = SkPDFMakeDict(); + attrDict->insertName("O", owner); + std::unique_ptr pdfArray = SkPDFMakeArray(); + for (float element : value) { + pdfArray->appendScalar(element); + } + attrDict->insertObject(name, std::move(pdfArray)); + fAttrs->appendObject(std::move(attrDict)); +} + +void SkPDF::AttributeList::appendNodeIdArray( + const char* owner, + const char* name, + const std::vector& nodeIds) { + if (!fAttrs) + fAttrs = SkPDFMakeArray(); + std::unique_ptr attrDict = SkPDFMakeDict(); + attrDict->insertName("O", owner); + std::unique_ptr pdfArray = SkPDFMakeArray(); + for (int nodeId : nodeIds) { + SkString idString = SkPDFTagNode::nodeIdToString(nodeId); + pdfArray->appendByteString(idString); + } + attrDict->insertObject(name, std::move(pdfArray)); + fAttrs->appendObject(std::move(attrDict)); +} + +SkPDFTagTree::SkPDFTagTree() : fArena(4 * sizeof(SkPDFTagNode)) {} + +SkPDFTagTree::~SkPDFTagTree() = default; + +// static +void SkPDFTagTree::Copy(SkPDF::StructureElementNode& node, + SkPDFTagNode* dst, + SkArenaAlloc* arena, + SkTHashMap* nodeMap) { + nodeMap->set(node.fNodeId, dst); + for (int nodeId : node.fAdditionalNodeIds) { + SkASSERT(!nodeMap->find(nodeId)); + nodeMap->set(nodeId, dst); + } + dst->fNodeId = node.fNodeId; + dst->fTypeString = node.fTypeString; + dst->fAlt = node.fAlt; + dst->fLang = node.fLang; + + size_t childCount = node.fChildVector.size(); + SkPDFTagNode* children = arena->makeArray(childCount); + dst->fChildCount = childCount; + dst->fChildren = children; + for (size_t i = 0; i < childCount; ++i) { + Copy(*node.fChildVector[i], &children[i], arena, nodeMap); + } + + dst->fAttributes = std::move(node.fAttributes.fAttrs); +} + +void SkPDFTagTree::init(SkPDF::StructureElementNode* node) { + if (node) { + fRoot = fArena.make(); + Copy(*node, fRoot, &fArena, &fNodeMap); + } +} + +int SkPDFTagTree::createMarkIdForNodeId(int nodeId, unsigned pageIndex) { + if (!fRoot) { + return -1; + } + SkPDFTagNode** tagPtr = fNodeMap.find(nodeId); + if (!tagPtr) { + return -1; + } + SkPDFTagNode* tag = *tagPtr; + SkASSERT(tag); + while (SkToUInt(fMarksPerPage.size()) < pageIndex + 1) { + fMarksPerPage.push_back(); + } + SkTArray& pageMarks = fMarksPerPage[pageIndex]; + int markId = pageMarks.size(); + tag->fMarkedContent.push_back({pageIndex, markId}); + pageMarks.push_back(tag); + return markId; +} + +int SkPDFTagTree::createStructParentKeyForNodeId(int nodeId, unsigned pageIndex) { + if (!fRoot) { + return -1; + } + SkPDFTagNode** tagPtr = fNodeMap.find(nodeId); + if (!tagPtr) { + return -1; + } + SkPDFTagNode* tag = *tagPtr; + SkASSERT(tag); + + tag->fCanDiscard = SkPDFTagNode::kNo; + + int nextStructParentKey = kFirstAnnotationStructParentKey + + static_cast(fParentTreeAnnotationNodeIds.size()); + fParentTreeAnnotationNodeIds.push_back(nodeId); + return nextStructParentKey; +} + +static bool can_discard(SkPDFTagNode* node) { + if (node->fCanDiscard == SkPDFTagNode::kYes) { + return true; + } + if (node->fCanDiscard == SkPDFTagNode::kNo) { + return false; + } + if (!node->fMarkedContent.empty()) { + node->fCanDiscard = SkPDFTagNode::kNo; + return false; + } + for (size_t i = 0; i < node->fChildCount; ++i) { + if (!can_discard(&node->fChildren[i])) { + node->fCanDiscard = SkPDFTagNode::kNo; + return false; + } + } + node->fCanDiscard = SkPDFTagNode::kYes; + return true; +} + +SkPDFIndirectReference SkPDFTagTree::PrepareTagTreeToEmit(SkPDFIndirectReference parent, + SkPDFTagNode* node, + SkPDFDocument* doc) { + SkPDFIndirectReference ref = doc->reserveRef(); + std::unique_ptr kids = SkPDFMakeArray(); + SkPDFTagNode* children = node->fChildren; + size_t childCount = node->fChildCount; + for (size_t i = 0; i < childCount; ++i) { + SkPDFTagNode* child = &children[i]; + if (!(can_discard(child))) { + kids->appendRef(PrepareTagTreeToEmit(ref, child, doc)); + } + } + for (const SkPDFTagNode::MarkedContentInfo& info : node->fMarkedContent) { + std::unique_ptr mcr = SkPDFMakeDict("MCR"); + mcr->insertRef("Pg", doc->getPage(info.fPageIndex)); + mcr->insertInt("MCID", info.fMarkId); + kids->appendObject(std::move(mcr)); + } + for (const SkPDFTagNode::AnnotationInfo& annotationInfo : node->fAnnotations) { + std::unique_ptr annotationDict = SkPDFMakeDict("OBJR"); + annotationDict->insertRef("Obj", annotationInfo.fAnnotationRef); + annotationDict->insertRef("Pg", doc->getPage(annotationInfo.fPageIndex)); + kids->appendObject(std::move(annotationDict)); + } + node->fRef = ref; + SkPDFDict dict("StructElem"); + dict.insertName("S", node->fTypeString.isEmpty() ? "NonStruct" : node->fTypeString.c_str()); + if (!node->fAlt.isEmpty()) { + dict.insertTextString("Alt", node->fAlt); + } + if (!node->fLang.isEmpty()) { + dict.insertTextString("Lang", node->fLang); + } + dict.insertRef("P", parent); + dict.insertObject("K", std::move(kids)); + if (node->fAttributes) { + dict.insertObject("A", std::move(node->fAttributes)); + } + + // Each node has a unique ID that also needs to be referenced + // in a separate IDTree node, along with the lowest and highest + // unique ID string. + SkString idString = SkPDFTagNode::nodeIdToString(node->fNodeId); + dict.insertByteString("ID", idString.c_str()); + IDTreeEntry idTreeEntry = {node->fNodeId, ref}; + fIdTreeEntries.push_back(idTreeEntry); + + return doc->emit(dict, ref); +} + +void SkPDFTagTree::addNodeAnnotation(int nodeId, SkPDFIndirectReference annotationRef, unsigned pageIndex) { + if (!fRoot) { + return; + } + SkPDFTagNode** tagPtr = fNodeMap.find(nodeId); + if (!tagPtr) { + return; + } + SkPDFTagNode* tag = *tagPtr; + SkASSERT(tag); + + SkPDFTagNode::AnnotationInfo annotationInfo = {pageIndex, annotationRef}; + tag->fAnnotations.push_back(annotationInfo); +} + +SkPDFIndirectReference SkPDFTagTree::makeStructTreeRoot(SkPDFDocument* doc) { + if (!fRoot || can_discard(fRoot)) { + return SkPDFIndirectReference(); + } + + SkPDFIndirectReference ref = doc->reserveRef(); + + unsigned pageCount = SkToUInt(doc->pageCount()); + + // Build the StructTreeRoot. + SkPDFDict structTreeRoot("StructTreeRoot"); + structTreeRoot.insertRef("K", PrepareTagTreeToEmit(ref, fRoot, doc)); + structTreeRoot.insertInt("ParentTreeNextKey", SkToInt(pageCount)); + + // Build the parent tree, which consists of two things: + // (1) For each page, a mapping from the marked content IDs on + // each page to their corresponding tags + // (2) For each annotation, an indirect reference to that + // annotation's struct tree element. + SkPDFDict parentTree("ParentTree"); + auto parentTreeNums = SkPDFMakeArray(); + + // First, one entry per page. + SkASSERT(SkToUInt(fMarksPerPage.size()) <= pageCount); + for (int j = 0; j < fMarksPerPage.size(); ++j) { + const SkTArray& pageMarks = fMarksPerPage[j]; + SkPDFArray markToTagArray; + for (SkPDFTagNode* mark : pageMarks) { + SkASSERT(mark->fRef); + markToTagArray.appendRef(mark->fRef); + } + parentTreeNums->appendInt(j); + parentTreeNums->appendRef(doc->emit(markToTagArray)); + } + + // Then, one entry per annotation. + for (size_t j = 0; j < fParentTreeAnnotationNodeIds.size(); ++j) { + int nodeId = fParentTreeAnnotationNodeIds[j]; + int structParentKey = kFirstAnnotationStructParentKey + static_cast(j); + + SkPDFTagNode** tagPtr = fNodeMap.find(nodeId); + if (!tagPtr) { + continue; + } + SkPDFTagNode* tag = *tagPtr; + parentTreeNums->appendInt(structParentKey); + parentTreeNums->appendRef(tag->fRef); + } + + parentTree.insertObject("Nums", std::move(parentTreeNums)); + structTreeRoot.insertRef("ParentTree", doc->emit(parentTree)); + + // Build the IDTree, a mapping from every unique ID string to + // a reference to its corresponding structure element node. + if (!fIdTreeEntries.empty()) { + std::sort(fIdTreeEntries.begin(), fIdTreeEntries.end(), + [](const IDTreeEntry& a, const IDTreeEntry& b) { + return a.nodeId < b.nodeId; + }); + + SkPDFDict idTree; + SkPDFDict idTreeLeaf; + auto limits = SkPDFMakeArray(); + SkString lowestNodeIdString = SkPDFTagNode::nodeIdToString( + fIdTreeEntries.begin()->nodeId); + limits->appendByteString(lowestNodeIdString); + SkString highestNodeIdString = SkPDFTagNode::nodeIdToString( + fIdTreeEntries.rbegin()->nodeId); + limits->appendByteString(highestNodeIdString); + idTreeLeaf.insertObject("Limits", std::move(limits)); + auto names = SkPDFMakeArray(); + for (const IDTreeEntry& entry : fIdTreeEntries) { + SkString idString = SkPDFTagNode::nodeIdToString(entry.nodeId); + names->appendByteString(idString); + names->appendRef(entry.ref); + } + idTreeLeaf.insertObject("Names", std::move(names)); + auto idTreeKids = SkPDFMakeArray(); + idTreeKids->appendRef(doc->emit(idTreeLeaf)); + idTree.insertObject("Kids", std::move(idTreeKids)); + structTreeRoot.insertRef("IDTree", doc->emit(idTree)); + } + + return doc->emit(structTreeRoot, ref); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFTag.h b/gfx/skia/skia/src/pdf/SkPDFTag.h new file mode 100644 index 0000000000..61d97ef57c --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFTag.h @@ -0,0 +1,64 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPDFTag_DEFINED +#define SkPDFTag_DEFINED + +#include "include/docs/SkPDFDocument.h" +#include "include/private/base/SkTArray.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkTHash.h" + +class SkPDFDocument; +struct SkPDFIndirectReference; +struct SkPDFTagNode; + +class SkPDFTagTree { +public: + SkPDFTagTree(); + ~SkPDFTagTree(); + void init(SkPDF::StructureElementNode*); + // Used to allow marked content to refer to its corresponding structure + // tree node, via a page entry in the parent tree. Returns -1 if no + // mark ID. + int createMarkIdForNodeId(int nodeId, unsigned pageIndex); + // Used to allow annotations to refer to their corresponding structure + // tree node, via the struct parent tree. Returns -1 if no struct parent + // key. + int createStructParentKeyForNodeId(int nodeId, unsigned pageIndex); + + void addNodeAnnotation(int nodeId, SkPDFIndirectReference annotationRef, unsigned pageIndex); + SkPDFIndirectReference makeStructTreeRoot(SkPDFDocument* doc); + +private: + // An entry in a map from a node ID to an indirect reference to its + // corresponding structure element node. + struct IDTreeEntry { + int nodeId; + SkPDFIndirectReference ref; + }; + + static void Copy(SkPDF::StructureElementNode& node, + SkPDFTagNode* dst, + SkArenaAlloc* arena, + SkTHashMap* nodeMap); + SkPDFIndirectReference PrepareTagTreeToEmit(SkPDFIndirectReference parent, + SkPDFTagNode* node, + SkPDFDocument* doc); + + SkArenaAlloc fArena; + SkTHashMap fNodeMap; + SkPDFTagNode* fRoot = nullptr; + SkTArray> fMarksPerPage; + std::vector fIdTreeEntries; + std::vector fParentTreeAnnotationNodeIds; + + SkPDFTagTree(const SkPDFTagTree&) = delete; + SkPDFTagTree& operator=(const SkPDFTagTree&) = delete; +}; + +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFType1Font.cpp b/gfx/skia/skia/src/pdf/SkPDFType1Font.cpp new file mode 100644 index 0000000000..da17281ef4 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFType1Font.cpp @@ -0,0 +1,339 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. + +#include "src/pdf/SkPDFType1Font.h" + +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkStrike.h" +#include "src/core/SkStrikeSpec.h" + +#include + +using namespace skia_private; + +/* + "A standard Type 1 font program, as described in the Adobe Type 1 + Font Format specification, consists of three parts: a clear-text + portion (written using PostScript syntax), an encrypted portion, and + a fixed-content portion. The fixed-content portion contains 512 + ASCII zeros followed by a cleartomark operator, and perhaps followed + by additional data. Although the encrypted portion of a standard + Type 1 font may be in binary or ASCII hexadecimal format, PDF + supports only the binary format." +*/ +static bool parsePFBSection(const uint8_t** src, size_t* len, int sectionType, + size_t* size) { + // PFB sections have a two or six bytes header. 0x80 and a one byte + // section type followed by a four byte section length. Type one is + // an ASCII section (includes a length), type two is a binary section + // (includes a length) and type three is an EOF marker with no length. + const uint8_t* buf = *src; + if (*len < 2 || buf[0] != 0x80 || buf[1] != sectionType) { + return false; + } else if (buf[1] == 3) { + return true; + } else if (*len < 6) { + return false; + } + + *size = (size_t)buf[2] | ((size_t)buf[3] << 8) | ((size_t)buf[4] << 16) | + ((size_t)buf[5] << 24); + size_t consumed = *size + 6; + if (consumed > *len) { + return false; + } + *src = *src + consumed; + *len = *len - consumed; + return true; +} + +static bool parsePFB(const uint8_t* src, size_t size, size_t* headerLen, + size_t* dataLen, size_t* trailerLen) { + const uint8_t* srcPtr = src; + size_t remaining = size; + + return parsePFBSection(&srcPtr, &remaining, 1, headerLen) && + parsePFBSection(&srcPtr, &remaining, 2, dataLen) && + parsePFBSection(&srcPtr, &remaining, 1, trailerLen) && + parsePFBSection(&srcPtr, &remaining, 3, nullptr); +} + +/* The sections of a PFA file are implicitly defined. The body starts + * after the line containing "eexec," and the trailer starts with 512 + * literal 0's followed by "cleartomark" (plus arbitrary white space). + * + * This function assumes that src is NUL terminated, but the NUL + * termination is not included in size. + * + */ +static bool parsePFA(const char* src, size_t size, size_t* headerLen, + size_t* hexDataLen, size_t* dataLen, size_t* trailerLen) { + const char* end = src + size; + + const char* dataPos = strstr(src, "eexec"); + if (!dataPos) { + return false; + } + dataPos += strlen("eexec"); + while ((*dataPos == '\n' || *dataPos == '\r' || *dataPos == ' ') && + dataPos < end) { + dataPos++; + } + *headerLen = dataPos - src; + + const char* trailerPos = strstr(dataPos, "cleartomark"); + if (!trailerPos) { + return false; + } + int zeroCount = 0; + for (trailerPos--; trailerPos > dataPos && zeroCount < 512; trailerPos--) { + if (*trailerPos == '\n' || *trailerPos == '\r' || *trailerPos == ' ') { + continue; + } else if (*trailerPos == '0') { + zeroCount++; + } else { + return false; + } + } + if (zeroCount != 512) { + return false; + } + + *hexDataLen = trailerPos - src - *headerLen; + *trailerLen = size - *headerLen - *hexDataLen; + + // Verify that the data section is hex encoded and count the bytes. + int nibbles = 0; + for (; dataPos < trailerPos; dataPos++) { + if (isspace(*dataPos)) { + continue; + } + // isxdigit() is locale-sensitive https://bugs.skia.org/8285 + if (nullptr == strchr("0123456789abcdefABCDEF", *dataPos)) { + return false; + } + nibbles++; + } + *dataLen = (nibbles + 1) / 2; + + return true; +} + +static int8_t hexToBin(uint8_t c) { + if (!isxdigit(c)) { + return -1; + } else if (c <= '9') { + return c - '0'; + } else if (c <= 'F') { + return c - 'A' + 10; + } else if (c <= 'f') { + return c - 'a' + 10; + } + return -1; +} + +static sk_sp convert_type1_font_stream(std::unique_ptr srcStream, + size_t* headerLen, + size_t* dataLen, + size_t* trailerLen) { + size_t srcLen = srcStream ? srcStream->getLength() : 0; + SkASSERT(srcLen); + if (!srcLen) { + return nullptr; + } + // Flatten and Nul-terminate the source stream so that we can use + // strstr() to search it. + AutoTMalloc sourceBuffer(SkToInt(srcLen + 1)); + (void)srcStream->read(sourceBuffer.get(), srcLen); + sourceBuffer[SkToInt(srcLen)] = 0; + const uint8_t* src = sourceBuffer.get(); + + if (parsePFB(src, srcLen, headerLen, dataLen, trailerLen)) { + static const int kPFBSectionHeaderLength = 6; + const size_t length = *headerLen + *dataLen + *trailerLen; + SkASSERT(length > 0); + SkASSERT(length + (2 * kPFBSectionHeaderLength) <= srcLen); + + sk_sp data(SkData::MakeUninitialized(length)); + + const uint8_t* const srcHeader = src + kPFBSectionHeaderLength; + // There is a six-byte section header before header and data + // (but not trailer) that we're not going to copy. + const uint8_t* const srcData = srcHeader + *headerLen + kPFBSectionHeaderLength; + const uint8_t* const srcTrailer = srcData + *headerLen; + + uint8_t* const resultHeader = (uint8_t*)data->writable_data(); + uint8_t* const resultData = resultHeader + *headerLen; + uint8_t* const resultTrailer = resultData + *dataLen; + + SkASSERT(resultTrailer + *trailerLen == resultHeader + length); + + memcpy(resultHeader, srcHeader, *headerLen); + memcpy(resultData, srcData, *dataLen); + memcpy(resultTrailer, srcTrailer, *trailerLen); + + return data; + } + + // A PFA has to be converted for PDF. + size_t hexDataLen; + if (!parsePFA((const char*)src, srcLen, headerLen, &hexDataLen, dataLen, + trailerLen)) { + return nullptr; + } + const size_t length = *headerLen + *dataLen + *trailerLen; + SkASSERT(length > 0); + auto data = SkData::MakeUninitialized(length); + uint8_t* buffer = (uint8_t*)data->writable_data(); + + memcpy(buffer, src, *headerLen); + uint8_t* const resultData = &(buffer[*headerLen]); + + const uint8_t* hexData = src + *headerLen; + const uint8_t* trailer = hexData + hexDataLen; + size_t outputOffset = 0; + uint8_t dataByte = 0; // To hush compiler. + bool highNibble = true; + for (; hexData < trailer; hexData++) { + int8_t curNibble = hexToBin(*hexData); + if (curNibble < 0) { + continue; + } + if (highNibble) { + dataByte = curNibble << 4; + highNibble = false; + } else { + dataByte |= curNibble; + highNibble = true; + resultData[outputOffset++] = dataByte; + } + } + if (!highNibble) { + resultData[outputOffset++] = dataByte; + } + SkASSERT(outputOffset == *dataLen); + + uint8_t* const resultTrailer = &(buffer[SkToInt(*headerLen + outputOffset)]); + memcpy(resultTrailer, src + *headerLen + hexDataLen, *trailerLen); + return data; +} + +inline static bool can_embed(const SkAdvancedTypefaceMetrics& metrics) { + return !SkToBool(metrics.fFlags & SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag); +} + +inline static SkScalar from_font_units(SkScalar scaled, uint16_t emSize) { + return emSize == 1000 ? scaled : scaled * 1000 / emSize; +} + +static SkPDFIndirectReference make_type1_font_descriptor(SkPDFDocument* doc, + const SkTypeface* typeface, + const SkAdvancedTypefaceMetrics* info) { + SkPDFDict descriptor("FontDescriptor"); + uint16_t emSize = SkToU16(typeface->getUnitsPerEm()); + if (info) { + SkPDFFont::PopulateCommonFontDescriptor(&descriptor, *info, emSize, 0); + if (can_embed(*info)) { + int ttcIndex; + size_t header SK_INIT_TO_AVOID_WARNING; + size_t data SK_INIT_TO_AVOID_WARNING; + size_t trailer SK_INIT_TO_AVOID_WARNING; + std::unique_ptr rawFontData = typeface->openStream(&ttcIndex); + sk_sp fontData = convert_type1_font_stream(std::move(rawFontData), + &header, &data, &trailer); + if (fontData) { + std::unique_ptr dict = SkPDFMakeDict(); + dict->insertInt("Length1", header); + dict->insertInt("Length2", data); + dict->insertInt("Length3", trailer); + auto fontStream = SkMemoryStream::Make(std::move(fontData)); + descriptor.insertRef("FontFile", + SkPDFStreamOut(std::move(dict), std::move(fontStream), + doc, SkPDFSteamCompressionEnabled::Yes)); + } + } + } + return doc->emit(descriptor); +} + + +static const std::vector& type_1_glyphnames(SkPDFDocument* canon, + const SkTypeface* typeface) { + SkTypefaceID typefaceID = typeface->uniqueID(); + const std::vector* glyphNames = canon->fType1GlyphNames.find(typefaceID); + if (!glyphNames) { + std::vector names(typeface->countGlyphs()); + SkPDFFont::GetType1GlyphNames(*typeface, names.data()); + glyphNames = canon->fType1GlyphNames.set(typefaceID, std::move(names)); + } + SkASSERT(glyphNames); + return *glyphNames; +} + +static SkPDFIndirectReference type1_font_descriptor(SkPDFDocument* doc, + const SkTypeface* typeface) { + SkTypefaceID typefaceID = typeface->uniqueID(); + if (SkPDFIndirectReference* ptr = doc->fFontDescriptors.find(typefaceID)) { + return *ptr; + } + const SkAdvancedTypefaceMetrics* info = SkPDFFont::GetMetrics(typeface, doc); + auto fontDescriptor = make_type1_font_descriptor(doc, typeface, info); + doc->fFontDescriptors.set(typefaceID, fontDescriptor); + return fontDescriptor; +} + + +void SkPDFEmitType1Font(const SkPDFFont& pdfFont, SkPDFDocument* doc) { + SkTypeface* typeface = pdfFont.typeface(); + const std::vector& glyphNames = type_1_glyphnames(doc, typeface); + SkGlyphID firstGlyphID = pdfFont.firstGlyphID(); + SkGlyphID lastGlyphID = pdfFont.lastGlyphID(); + + SkPDFDict font("Font"); + font.insertRef("FontDescriptor", type1_font_descriptor(doc, typeface)); + font.insertName("Subtype", "Type1"); + if (const SkAdvancedTypefaceMetrics* info = SkPDFFont::GetMetrics(typeface, doc)) { + font.insertName("BaseFont", info->fPostScriptName); + } + + // glyphCount not including glyph 0 + unsigned glyphCount = 1 + lastGlyphID - firstGlyphID; + SkASSERT(glyphCount > 0 && glyphCount <= 255); + font.insertInt("FirstChar", (size_t)0); + font.insertInt("LastChar", (size_t)glyphCount); + { + int emSize; + auto widths = SkPDFMakeArray(); + + int glyphRangeSize = lastGlyphID - firstGlyphID + 2; + AutoTArray glyphIDs{glyphRangeSize}; + glyphIDs[0] = 0; + for (unsigned gId = firstGlyphID; gId <= lastGlyphID; gId++) { + glyphIDs[gId - firstGlyphID + 1] = gId; + } + SkStrikeSpec strikeSpec = SkStrikeSpec::MakePDFVector(*typeface, &emSize); + SkBulkGlyphMetrics metrics{strikeSpec}; + auto glyphs = metrics.glyphs(SkSpan(glyphIDs.get(), glyphRangeSize)); + for (int i = 0; i < glyphRangeSize; ++i) { + widths->appendScalar(from_font_units(glyphs[i]->advanceX(), SkToU16(emSize))); + } + font.insertObject("Widths", std::move(widths)); + } + auto encDiffs = SkPDFMakeArray(); + encDiffs->reserve(lastGlyphID - firstGlyphID + 3); + encDiffs->appendInt(0); + + SkASSERT(glyphNames.size() > lastGlyphID); + const SkString unknown("UNKNOWN"); + encDiffs->appendName(glyphNames[0].isEmpty() ? unknown : glyphNames[0]); + for (int gID = firstGlyphID; gID <= lastGlyphID; gID++) { + encDiffs->appendName(glyphNames[gID].isEmpty() ? unknown : glyphNames[gID]); + } + + auto encoding = SkPDFMakeDict("Encoding"); + encoding->insertObject("Differences", std::move(encDiffs)); + font.insertObject("Encoding", std::move(encoding)); + + doc->emit(font, pdfFont.indirectReference()); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFType1Font.h b/gfx/skia/skia/src/pdf/SkPDFType1Font.h new file mode 100644 index 0000000000..7f9d972fe5 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFType1Font.h @@ -0,0 +1,11 @@ +// Copyright 2019 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkPDFType1Font_DEFINED +#define SkPDFType1Font_DEFINED + +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFFont.h" + +void SkPDFEmitType1Font(const SkPDFFont&, SkPDFDocument*); + +#endif // SkPDFType1Font_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFTypes.cpp b/gfx/skia/skia/src/pdf/SkPDFTypes.cpp new file mode 100644 index 0000000000..79c402a9ad --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFTypes.cpp @@ -0,0 +1,602 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFTypes.h" + +#include "include/core/SkData.h" +#include "include/core/SkExecutor.h" +#include "include/core/SkStream.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkStreamPriv.h" +#include "src/pdf/SkDeflate.h" +#include "src/pdf/SkPDFDocumentPriv.h" +#include "src/pdf/SkPDFUnion.h" +#include "src/pdf/SkPDFUtils.h" + +#include + +//////////////////////////////////////////////////////////////////////////////// + +SkPDFUnion::SkPDFUnion(Type t, int32_t v) : fIntValue (v) , fType(t) {} +SkPDFUnion::SkPDFUnion(Type t, bool v) : fBoolValue (v) , fType(t) {} +SkPDFUnion::SkPDFUnion(Type t, SkScalar v) : fScalarValue (v) , fType(t) {} +SkPDFUnion::SkPDFUnion(Type t, const char* v) : fStaticString (v) , fType(t) {} +SkPDFUnion::SkPDFUnion(Type t, SkString v) : fSkString(std::move(v)), fType(t) {} +SkPDFUnion::SkPDFUnion(Type t, PDFObject v) : fObject (std::move(v)), fType(t) {} + +SkPDFUnion::~SkPDFUnion() { + switch (fType) { + case Type::kNameSkS: + case Type::kByteStringSkS: + case Type::kTextStringSkS: + fSkString.~SkString(); + return; + case Type::kObject: + fObject.~PDFObject(); + return; + default: + return; + } +} + +SkPDFUnion::SkPDFUnion(SkPDFUnion&& that) : fType(that.fType) { + SkASSERT(this != &that); + + switch (fType) { + case Type::kDestroyed: + break; + case Type::kInt: + case Type::kColorComponent: + case Type::kRef: + fIntValue = that.fIntValue; + break; + case Type::kBool: + fBoolValue = that.fBoolValue; + break; + case Type::kColorComponentF: + case Type::kScalar: + fScalarValue = that.fScalarValue; + break; + case Type::kName: + case Type::kByteString: + case Type::kTextString: + fStaticString = that.fStaticString; + break; + case Type::kNameSkS: + case Type::kByteStringSkS: + case Type::kTextStringSkS: + new (&fSkString) SkString(std::move(that.fSkString)); + break; + case Type::kObject: + new (&fObject) PDFObject(std::move(that.fObject)); + break; + default: + SkDEBUGFAIL("SkPDFUnion::SkPDFUnion with bad type"); + } + that.fType = Type::kDestroyed; +} + +SkPDFUnion& SkPDFUnion::operator=(SkPDFUnion&& that) { + if (this != &that) { + this->~SkPDFUnion(); + new (this) SkPDFUnion(std::move(that)); + } + return *this; +} + +bool SkPDFUnion::isName() const { + return Type::kName == fType || Type::kNameSkS == fType; +} + +#ifdef SK_DEBUG +// Most names need no escaping. Such names are handled as static const strings. +bool is_valid_name(const char* n) { + static const char kControlChars[] = "/%()<>[]{}"; + while (*n) { + if (*n < '!' || *n > '~' || strchr(kControlChars, *n)) { + return false; + } + ++n; + } + return true; +} +#endif // SK_DEBUG + +// Given an arbitrary string, write it as a valid name (not including leading slash). +static void write_name_escaped(SkWStream* o, const char* name) { + static const char kToEscape[] = "#/%()<>[]{}"; + for (const uint8_t* n = reinterpret_cast(name); *n; ++n) { + uint8_t v = *n; + if (v < '!' || v > '~' || strchr(kToEscape, v)) { + char buffer[3] = {'#', + SkHexadecimalDigits::gUpper[v >> 4], + SkHexadecimalDigits::gUpper[v & 0xF]}; + o->write(buffer, sizeof(buffer)); + } else { + o->write(n, 1); + } + } +} + +static void write_literal_byte_string(SkWStream* wStream, const char* cin, size_t len) { + wStream->writeText("("); + for (size_t i = 0; i < len; i++) { + uint8_t c = static_cast(cin[i]); + if (c < ' ' || '~' < c) { + uint8_t octal[4] = { '\\', + (uint8_t)('0' | ( c >> 6 )), + (uint8_t)('0' | ((c >> 3) & 0x07)), + (uint8_t)('0' | ( c & 0x07)) }; + wStream->write(octal, 4); + } else { + if (c == '\\' || c == '(' || c == ')') { + wStream->writeText("\\"); + } + wStream->write(&c, 1); + } + } + wStream->writeText(")"); +} + +static void write_hex_byte_string(SkWStream* wStream, const char* cin, size_t len) { + SkDEBUGCODE(static const size_t kMaxLen = 65535;) + SkASSERT(len <= kMaxLen); + + wStream->writeText("<"); + for (size_t i = 0; i < len; i++) { + uint8_t c = static_cast(cin[i]); + char hexValue[2] = { SkHexadecimalDigits::gUpper[c >> 4], + SkHexadecimalDigits::gUpper[c & 0xF] }; + wStream->write(hexValue, 2); + } + wStream->writeText(">"); +} + +static void write_optimized_byte_string(SkWStream* wStream, const char* cin, size_t len, + size_t literalExtras) { + const size_t hexLength = 2 + 2*len; + const size_t literalLength = 2 + len + literalExtras; + if (literalLength <= hexLength) { + write_literal_byte_string(wStream, cin, len); + } else { + write_hex_byte_string(wStream, cin, len); + } +} + +static void write_byte_string(SkWStream* wStream, const char* cin, size_t len) { + SkDEBUGCODE(static const size_t kMaxLen = 65535;) + SkASSERT(len <= kMaxLen); + + size_t literalExtras = 0; + { + for (size_t i = 0; i < len; i++) { + uint8_t c = static_cast(cin[i]); + if (c < ' ' || '~' < c) { + literalExtras += 3; + } else if (c == '\\' || c == '(' || c == ')') { + ++literalExtras; + } + } + } + write_optimized_byte_string(wStream, cin, len, literalExtras); +} + +static void write_text_string(SkWStream* wStream, const char* cin, size_t len) { + SkDEBUGCODE(static const size_t kMaxLen = 65535;) + SkASSERT(len <= kMaxLen); + + bool inputIsValidUTF8 = true; + bool inputIsPDFDocEncoding = true; + size_t literalExtras = 0; + { + const char* textPtr = cin; + const char* textEnd = cin + len; + while (textPtr < textEnd) { + SkUnichar unichar = SkUTF::NextUTF8(&textPtr, textEnd); + if (unichar < 0) { + inputIsValidUTF8 = false; + break; + } + // See Table D.2 (PDFDocEncoding Character Set) in the PDF3200_2008 spec. + // Could convert from UTF-8 to PDFDocEncoding and, if successful, use that. + if ((0x15 < unichar && unichar < 0x20) || 0x7E < unichar) { + inputIsPDFDocEncoding = false; + break; + } + if (unichar < ' ' || '~' < unichar) { + literalExtras += 3; + } else if (unichar == '\\' || unichar == '(' || unichar == ')') { + ++literalExtras; + } + } + } + + if (!inputIsValidUTF8) { + SkDebugf("Invalid UTF8: %.*s\n", (int)len, cin); + wStream->writeText("<>"); + return; + } + + if (inputIsPDFDocEncoding) { + write_optimized_byte_string(wStream, cin, len, literalExtras); + return; + } + + wStream->writeText("writeText(">"); +} + +void SkPDFWriteTextString(SkWStream* wStream, const char* cin, size_t len) { + write_text_string(wStream, cin, len); +} +void SkPDFWriteByteString(SkWStream* wStream, const char* cin, size_t len) { + write_byte_string(wStream, cin, len); +} + +void SkPDFUnion::emitObject(SkWStream* stream) const { + switch (fType) { + case Type::kInt: + stream->writeDecAsText(fIntValue); + return; + case Type::kColorComponent: + SkPDFUtils::AppendColorComponent(SkToU8(fIntValue), stream); + return; + case Type::kColorComponentF: + SkPDFUtils::AppendColorComponentF(fScalarValue, stream); + return; + case Type::kBool: + stream->writeText(fBoolValue ? "true" : "false"); + return; + case Type::kScalar: + SkPDFUtils::AppendScalar(fScalarValue, stream); + return; + case Type::kName: + stream->writeText("/"); + SkASSERT(is_valid_name(fStaticString)); + stream->writeText(fStaticString); + return; + case Type::kByteString: + SkASSERT(fStaticString); + write_byte_string(stream, fStaticString, strlen(fStaticString)); + return; + case Type::kTextString: + SkASSERT(fStaticString); + write_text_string(stream, fStaticString, strlen(fStaticString)); + return; + case Type::kNameSkS: + stream->writeText("/"); + write_name_escaped(stream, fSkString.c_str()); + return; + case Type::kByteStringSkS: + write_byte_string(stream, fSkString.c_str(), fSkString.size()); + return; + case Type::kTextStringSkS: + write_text_string(stream, fSkString.c_str(), fSkString.size()); + return; + case Type::kObject: + fObject->emitObject(stream); + return; + case Type::kRef: + SkASSERT(fIntValue >= 0); + stream->writeDecAsText(fIntValue); + stream->writeText(" 0 R"); // Generation number is always 0. + return; + default: + SkDEBUGFAIL("SkPDFUnion::emitObject with bad type"); + } +} + +SkPDFUnion SkPDFUnion::Int(int32_t value) { + return SkPDFUnion(Type::kInt, value); +} + +SkPDFUnion SkPDFUnion::ColorComponent(uint8_t value) { + return SkPDFUnion(Type::kColorComponent, SkTo(value)); +} + +SkPDFUnion SkPDFUnion::ColorComponentF(float value) { + return SkPDFUnion(Type::kColorComponentF, SkFloatToScalar(value)); +} + +SkPDFUnion SkPDFUnion::Bool(bool value) { + return SkPDFUnion(Type::kBool, value); +} + +SkPDFUnion SkPDFUnion::Scalar(SkScalar value) { + return SkPDFUnion(Type::kScalar, value); +} + +SkPDFUnion SkPDFUnion::Name(const char* value) { + SkASSERT(value); + SkASSERT(is_valid_name(value)); + return SkPDFUnion(Type::kName, value); +} + +SkPDFUnion SkPDFUnion::ByteString(const char* value) { + SkASSERT(value); + return SkPDFUnion(Type::kByteString, value); +} + +SkPDFUnion SkPDFUnion::TextString(const char* value) { + SkASSERT(value); + return SkPDFUnion(Type::kTextString, value); +} + +SkPDFUnion SkPDFUnion::Name(SkString s) { + return SkPDFUnion(Type::kNameSkS, std::move(s)); +} + +SkPDFUnion SkPDFUnion::ByteString(SkString s) { + return SkPDFUnion(Type::kByteStringSkS, std::move(s)); +} + +SkPDFUnion SkPDFUnion::TextString(SkString s) { + return SkPDFUnion(Type::kTextStringSkS, std::move(s)); +} + +SkPDFUnion SkPDFUnion::Object(std::unique_ptr objSp) { + SkASSERT(objSp.get()); + return SkPDFUnion(Type::kObject, std::move(objSp)); +} + +SkPDFUnion SkPDFUnion::Ref(SkPDFIndirectReference ref) { + SkASSERT(ref.fValue > 0); + return SkPDFUnion(Type::kRef, SkTo(ref.fValue)); +} + +//////////////////////////////////////////////////////////////////////////////// + +#if 0 // Enable if needed. +void SkPDFAtom::emitObject(SkWStream* stream) const { + fValue.emitObject(stream); +} +#endif // 0 + +//////////////////////////////////////////////////////////////////////////////// + +SkPDFArray::SkPDFArray() {} + +SkPDFArray::~SkPDFArray() {} + +size_t SkPDFArray::size() const { return fValues.size(); } + +void SkPDFArray::reserve(int length) { + fValues.reserve(length); +} + +void SkPDFArray::emitObject(SkWStream* stream) const { + stream->writeText("["); + for (size_t i = 0; i < fValues.size(); i++) { + fValues[i].emitObject(stream); + if (i + 1 < fValues.size()) { + stream->writeText(" "); + } + } + stream->writeText("]"); +} + +void SkPDFArray::append(SkPDFUnion&& value) { + fValues.emplace_back(std::move(value)); +} + +void SkPDFArray::appendInt(int32_t value) { + this->append(SkPDFUnion::Int(value)); +} + +void SkPDFArray::appendColorComponent(uint8_t value) { + this->append(SkPDFUnion::ColorComponent(value)); +} + +void SkPDFArray::appendBool(bool value) { + this->append(SkPDFUnion::Bool(value)); +} + +void SkPDFArray::appendScalar(SkScalar value) { + this->append(SkPDFUnion::Scalar(value)); +} + +void SkPDFArray::appendName(const char name[]) { + this->append(SkPDFUnion::Name(SkString(name))); +} + +void SkPDFArray::appendName(SkString name) { + this->append(SkPDFUnion::Name(std::move(name))); +} + +void SkPDFArray::appendByteString(SkString value) { + this->append(SkPDFUnion::ByteString(std::move(value))); +} + +void SkPDFArray::appendTextString(SkString value) { + this->append(SkPDFUnion::TextString(std::move(value))); +} + +void SkPDFArray::appendByteString(const char value[]) { + this->append(SkPDFUnion::ByteString(value)); +} + +void SkPDFArray::appendTextString(const char value[]) { + this->append(SkPDFUnion::TextString(value)); +} + +void SkPDFArray::appendObject(std::unique_ptr&& objSp) { + this->append(SkPDFUnion::Object(std::move(objSp))); +} + +void SkPDFArray::appendRef(SkPDFIndirectReference ref) { + this->append(SkPDFUnion::Ref(ref)); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkPDFDict::~SkPDFDict() {} + +SkPDFDict::SkPDFDict(const char type[]) { + if (type) { + this->insertName("Type", type); + } +} + +void SkPDFDict::emitObject(SkWStream* stream) const { + stream->writeText("<<"); + for (size_t i = 0; i < fRecords.size(); ++i) { + const std::pair& record = fRecords[i]; + record.first.emitObject(stream); + stream->writeText(" "); + record.second.emitObject(stream); + if (i + 1 < fRecords.size()) { + stream->writeText("\n"); + } + } + stream->writeText(">>"); +} + +size_t SkPDFDict::size() const { return fRecords.size(); } + +void SkPDFDict::reserve(int n) { + fRecords.reserve(n); +} + +void SkPDFDict::insertRef(const char key[], SkPDFIndirectReference ref) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::Ref(ref)); +} + +void SkPDFDict::insertRef(SkString key, SkPDFIndirectReference ref) { + fRecords.emplace_back(SkPDFUnion::Name(std::move(key)), SkPDFUnion::Ref(ref)); +} + +void SkPDFDict::insertObject(const char key[], std::unique_ptr&& objSp) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::Object(std::move(objSp))); +} +void SkPDFDict::insertObject(SkString key, std::unique_ptr&& objSp) { + fRecords.emplace_back(SkPDFUnion::Name(std::move(key)), + SkPDFUnion::Object(std::move(objSp))); +} + +void SkPDFDict::insertBool(const char key[], bool value) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::Bool(value)); +} + +void SkPDFDict::insertInt(const char key[], int32_t value) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::Int(value)); +} + +void SkPDFDict::insertInt(const char key[], size_t value) { + this->insertInt(key, SkToS32(value)); +} + +void SkPDFDict::insertColorComponentF(const char key[], SkScalar value) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::ColorComponentF(value)); +} + +void SkPDFDict::insertScalar(const char key[], SkScalar value) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::Scalar(value)); +} + +void SkPDFDict::insertName(const char key[], const char name[]) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::Name(name)); +} + +void SkPDFDict::insertName(const char key[], SkString name) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::Name(std::move(name))); +} + +void SkPDFDict::insertByteString(const char key[], const char value[]) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::ByteString(value)); +} + +void SkPDFDict::insertTextString(const char key[], const char value[]) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::TextString(value)); +} + +void SkPDFDict::insertByteString(const char key[], SkString value) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::ByteString(std::move(value))); +} + +void SkPDFDict::insertTextString(const char key[], SkString value) { + fRecords.emplace_back(SkPDFUnion::Name(key), SkPDFUnion::TextString(std::move(value))); +} + +//////////////////////////////////////////////////////////////////////////////// + + + +static void serialize_stream(SkPDFDict* origDict, + SkStreamAsset* stream, + SkPDFSteamCompressionEnabled compress, + SkPDFDocument* doc, + SkPDFIndirectReference ref) { + // Code assumes that the stream starts at the beginning. + SkASSERT(stream && stream->hasLength()); + + std::unique_ptr tmp; + SkPDFDict tmpDict; + SkPDFDict& dict = origDict ? *origDict : tmpDict; + static const size_t kMinimumSavings = strlen("/Filter_/FlateDecode_"); + if (doc->metadata().fCompressionLevel != SkPDF::Metadata::CompressionLevel::None && + compress == SkPDFSteamCompressionEnabled::Yes && + stream->getLength() > kMinimumSavings) + { + SkDynamicMemoryWStream compressedData; + SkDeflateWStream deflateWStream(&compressedData,SkToInt(doc->metadata().fCompressionLevel)); + SkStreamCopy(&deflateWStream, stream); + deflateWStream.finalize(); + #ifdef SK_PDF_BASE85_BINARY + { + SkPDFUtils::Base85Encode(compressedData.detachAsStream(), &compressedData); + tmp = compressedData.detachAsStream(); + stream = tmp.get(); + auto filters = SkPDFMakeArray(); + filters->appendName("ASCII85Decode"); + filters->appendName("FlateDecode"); + dict.insertObject("Filter", std::move(filters)); + } + #else + if (stream->getLength() > compressedData.bytesWritten() + kMinimumSavings) { + tmp = compressedData.detachAsStream(); + stream = tmp.get(); + dict.insertName("Filter", "FlateDecode"); + } else { + SkAssertResult(stream->rewind()); + } + #endif + + } + dict.insertInt("Length", stream->getLength()); + doc->emitStream(dict, + [stream](SkWStream* dst) { dst->writeStream(stream, stream->getLength()); }, + ref); +} + +SkPDFIndirectReference SkPDFStreamOut(std::unique_ptr dict, + std::unique_ptr content, + SkPDFDocument* doc, + SkPDFSteamCompressionEnabled compress) { + SkPDFIndirectReference ref = doc->reserveRef(); + if (SkExecutor* executor = doc->executor()) { + SkPDFDict* dictPtr = dict.release(); + SkStreamAsset* contentPtr = content.release(); + // Pass ownership of both pointers into a std::function, which should + // only be executed once. + doc->incrementJobCount(); + executor->add([dictPtr, contentPtr, compress, doc, ref]() { + serialize_stream(dictPtr, contentPtr, compress, doc, ref); + delete dictPtr; + delete contentPtr; + doc->signalJobComplete(); + }); + return ref; + } + serialize_stream(dict.get(), content.get(), compress, doc, ref); + return ref; +} diff --git a/gfx/skia/skia/src/pdf/SkPDFTypes.h b/gfx/skia/skia/src/pdf/SkPDFTypes.h new file mode 100644 index 0000000000..3726017501 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFTypes.h @@ -0,0 +1,218 @@ +/* + * Copyright 2010 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPDFTypes_DEFINED +#define SkPDFTypes_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkTHash.h" + +#include +#include +#include +#include +#include +#include + +class SkData; +class SkPDFArray; + +class SkPDFDict; +class SkPDFDocument; +class SkPDFObject; +class SkPDFUnion; +class SkStreamAsset; +class SkString; +class SkWStream; +struct SkPDFObjectSerializer; + +struct SkPDFIndirectReference { + int fValue = -1; + explicit operator bool() { return fValue != -1; } +}; + +inline static bool operator==(SkPDFIndirectReference u, SkPDFIndirectReference v) { + return u.fValue == v.fValue; +} + +inline static bool operator!=(SkPDFIndirectReference u, SkPDFIndirectReference v) { + return u.fValue != v.fValue; +} + +/** \class SkPDFObject + + A PDF Object is the base class for primitive elements in a PDF file. A + common subtype is used to ease the use of indirect object references, + which are common in the PDF format. + +*/ +class SkPDFObject { +public: + SkPDFObject() = default; + + /** Subclasses must implement this method to print the object to the + * PDF file. + * @param catalog The object catalog to use. + * @param stream The writable output stream to send the output to. + */ + virtual void emitObject(SkWStream* stream) const = 0; + + virtual ~SkPDFObject() = default; + +private: + SkPDFObject(SkPDFObject&&) = delete; + SkPDFObject(const SkPDFObject&) = delete; + SkPDFObject& operator=(SkPDFObject&&) = delete; + SkPDFObject& operator=(const SkPDFObject&) = delete; +}; + +//////////////////////////////////////////////////////////////////////////////// + +/** \class SkPDFArray + + An array object in a PDF. +*/ +class SkPDFArray final : public SkPDFObject { +public: + /** Create a PDF array. Maximum length is 8191. + */ + SkPDFArray(); + ~SkPDFArray() override; + + // The SkPDFObject interface. + void emitObject(SkWStream* stream) const override; + + /** The size of the array. + */ + size_t size() const; + + /** Preallocate space for the given number of entries. + * @param length The number of array slots to preallocate. + */ + void reserve(int length); + + /** Appends a value to the end of the array. + * @param value The value to add to the array. + */ + void appendInt(int32_t); + void appendColorComponent(uint8_t); + void appendBool(bool); + void appendScalar(SkScalar); + void appendName(const char[]); + void appendName(SkString); + void appendByteString(const char[]); + void appendTextString(const char[]); + void appendByteString(SkString); + void appendTextString(SkString); + void appendObject(std::unique_ptr&&); + void appendRef(SkPDFIndirectReference); + +private: + std::vector fValues; + void append(SkPDFUnion&& value); +}; + +static inline void SkPDFArray_Append(SkPDFArray* a, int v) { a->appendInt(v); } + +static inline void SkPDFArray_Append(SkPDFArray* a, SkScalar v) { a->appendScalar(v); } + +template +static inline void SkPDFArray_Append(SkPDFArray* a, T v, Args... args) { + SkPDFArray_Append(a, v); + SkPDFArray_Append(a, args...); +} + +static inline void SkPDFArray_Append(SkPDFArray* a) {} + +template +static inline std::unique_ptr SkPDFMakeArray(Args... args) { + std::unique_ptr ret(new SkPDFArray()); + ret->reserve(sizeof...(Args)); + SkPDFArray_Append(ret.get(), args...); + return ret; +} + +/** \class SkPDFDict + + A dictionary object in a PDF. +*/ +class SkPDFDict final : public SkPDFObject { +public: + /** Create a PDF dictionary. + * @param type The value of the Type entry, nullptr for no type. + */ + explicit SkPDFDict(const char type[] = nullptr); + + ~SkPDFDict() override; + + // The SkPDFObject interface. + void emitObject(SkWStream* stream) const override; + + /** The size of the dictionary. + */ + size_t size() const; + + /** Preallocate space for n key-value pairs */ + void reserve(int n); + + /** Add the value to the dictionary with the given key. + * @param key The text of the key for this dictionary entry. + * @param value The value for this dictionary entry. + */ + void insertObject(const char key[], std::unique_ptr&&); + void insertObject(SkString, std::unique_ptr&&); + void insertRef(const char key[], SkPDFIndirectReference); + void insertRef(SkString, SkPDFIndirectReference); + + /** Add the value to the dictionary with the given key. + * @param key The text of the key for this dictionary entry. + * @param value The value for this dictionary entry. + */ + void insertBool(const char key[], bool value); + void insertInt(const char key[], int32_t value); + void insertInt(const char key[], size_t value); + void insertScalar(const char key[], SkScalar value); + void insertColorComponentF(const char key[], SkScalar value); + void insertName(const char key[], const char nameValue[]); + void insertName(const char key[], SkString nameValue); + void insertByteString(const char key[], const char value[]); + void insertTextString(const char key[], const char value[]); + void insertByteString(const char key[], SkString value); + void insertTextString(const char key[], SkString value); + +private: + std::vector> fRecords; +}; + +static inline std::unique_ptr SkPDFMakeDict(const char* type = nullptr) { + return std::make_unique(type); +} + +enum class SkPDFSteamCompressionEnabled : bool { + No = false, + Yes = true, + Default = +#ifdef SK_PDF_LESS_COMPRESSION + No, +#else + Yes, +#endif +}; + +// Exposed for unit testing. +void SkPDFWriteTextString(SkWStream* wStream, const char* cin, size_t len); +void SkPDFWriteByteString(SkWStream* wStream, const char* cin, size_t len); + +SkPDFIndirectReference SkPDFStreamOut( + std::unique_ptr dict, + std::unique_ptr stream, + SkPDFDocument* doc, + SkPDFSteamCompressionEnabled compress = SkPDFSteamCompressionEnabled::Default); +#endif diff --git a/gfx/skia/skia/src/pdf/SkPDFUnion.h b/gfx/skia/skia/src/pdf/SkPDFUnion.h new file mode 100644 index 0000000000..51cb5f0a96 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFUnion.h @@ -0,0 +1,112 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkPDFUnion_DEFINED +#define SkPDFUnion_DEFINED + +#include "src/pdf/SkPDFTypes.h" + +/** + A SkPDFUnion is a non-virtualized implementation of the + non-compound, non-specialized PDF Object types: Name, String, + Number, Boolean. + */ +class SkPDFUnion { +public: + // Move constructor and assignment operator destroy the argument + // and steal their references (if needed). + SkPDFUnion(SkPDFUnion&&); + SkPDFUnion& operator=(SkPDFUnion&&); + + ~SkPDFUnion(); + + /** The following nine functions are the standard way of creating + SkPDFUnion objects. */ + + static SkPDFUnion Int(int32_t); + + static SkPDFUnion Int(size_t v) { return SkPDFUnion::Int(SkToS32(v)); } + + static SkPDFUnion Bool(bool); + + static SkPDFUnion Scalar(SkScalar); + + static SkPDFUnion ColorComponent(uint8_t); + + static SkPDFUnion ColorComponentF(float); + + /** These two functions do NOT take ownership of char*, and do NOT + copy the string. Suitable for passing in static const + strings. For example: + SkPDFUnion n = SkPDFUnion::Name("Length"); + SkPDFUnion u = SkPDFUnion::String("Identity"); */ + + /** SkPDFUnion::Name(const char*) assumes that the passed string + is already a valid name (that is: it has no control or + whitespace characters). This will not copy the name. */ + static SkPDFUnion Name(const char*); + + /** SkPDFUnion::String will encode the passed string. This will not copy. */ + static SkPDFUnion ByteString(const char*); + static SkPDFUnion TextString(const char*); + + /** SkPDFUnion::Name(SkString) does not assume that the + passed string is already a valid name and it will escape the + string. */ + static SkPDFUnion Name(SkString); + + /** SkPDFUnion::String will encode the passed string. */ + static SkPDFUnion ByteString(SkString); + static SkPDFUnion TextString(SkString); + + static SkPDFUnion Object(std::unique_ptr); + + static SkPDFUnion Ref(SkPDFIndirectReference); + + /** These two non-virtual methods mirror SkPDFObject's + corresponding virtuals. */ + void emitObject(SkWStream*) const; + + bool isName() const; + +private: + using PDFObject = std::unique_ptr; + union { + int32_t fIntValue; + bool fBoolValue; + SkScalar fScalarValue; + const char* fStaticString; + SkString fSkString; + PDFObject fObject; + }; + enum class Type : char { + /** It is an error to call emitObject() or addResources() on an kDestroyed object. */ + kDestroyed = 0, + kInt, + kColorComponent, + kColorComponentF, + kBool, + kScalar, + kName, + kByteString, + kTextString, + kNameSkS, + kByteStringSkS, + kTextStringSkS, + kObject, + kRef, + }; + Type fType; + + SkPDFUnion(Type, int32_t); + SkPDFUnion(Type, bool); + SkPDFUnion(Type, SkScalar); + SkPDFUnion(Type, const char*); + SkPDFUnion(Type, SkString); + SkPDFUnion(Type, PDFObject); + + SkPDFUnion& operator=(const SkPDFUnion&) = delete; + SkPDFUnion(const SkPDFUnion&) = delete; +}; +static_assert(sizeof(SkString) == sizeof(void*), "SkString_size"); + +#endif // SkPDFUnion_DEFINED diff --git a/gfx/skia/skia/src/pdf/SkPDFUtils.cpp b/gfx/skia/skia/src/pdf/SkPDFUtils.cpp new file mode 100644 index 0000000000..d5b9923095 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFUtils.cpp @@ -0,0 +1,395 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/pdf/SkPDFUtils.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkData.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/private/base/SkFixed.h" +#include "src/core/SkGeometry.h" +#include "src/core/SkPathPriv.h" +#include "src/image/SkImage_Base.h" +#include "src/pdf/SkPDFResourceDict.h" +#include "src/pdf/SkPDFTypes.h" + +#include + +const char* SkPDFUtils::BlendModeName(SkBlendMode mode) { + // PDF32000.book section 11.3.5 "Blend Mode" + switch (mode) { + case SkBlendMode::kSrcOver: return "Normal"; + case SkBlendMode::kXor: return "Normal"; // (unsupported mode) + case SkBlendMode::kPlus: return "Normal"; // (unsupported mode) + case SkBlendMode::kScreen: return "Screen"; + case SkBlendMode::kOverlay: return "Overlay"; + case SkBlendMode::kDarken: return "Darken"; + case SkBlendMode::kLighten: return "Lighten"; + case SkBlendMode::kColorDodge: return "ColorDodge"; + case SkBlendMode::kColorBurn: return "ColorBurn"; + case SkBlendMode::kHardLight: return "HardLight"; + case SkBlendMode::kSoftLight: return "SoftLight"; + case SkBlendMode::kDifference: return "Difference"; + case SkBlendMode::kExclusion: return "Exclusion"; + case SkBlendMode::kMultiply: return "Multiply"; + case SkBlendMode::kHue: return "Hue"; + case SkBlendMode::kSaturation: return "Saturation"; + case SkBlendMode::kColor: return "Color"; + case SkBlendMode::kLuminosity: return "Luminosity"; + // Other blendmodes are handled in SkPDFDevice::setUpContentEntry. + default: return nullptr; + } +} + +std::unique_ptr SkPDFUtils::RectToArray(const SkRect& r) { + return SkPDFMakeArray(r.left(), r.top(), r.right(), r.bottom()); +} + +std::unique_ptr SkPDFUtils::MatrixToArray(const SkMatrix& matrix) { + SkScalar a[6]; + if (!matrix.asAffine(a)) { + SkMatrix::SetAffineIdentity(a); + } + return SkPDFMakeArray(a[0], a[1], a[2], a[3], a[4], a[5]); +} + +void SkPDFUtils::MoveTo(SkScalar x, SkScalar y, SkWStream* content) { + SkPDFUtils::AppendScalar(x, content); + content->writeText(" "); + SkPDFUtils::AppendScalar(y, content); + content->writeText(" m\n"); +} + +void SkPDFUtils::AppendLine(SkScalar x, SkScalar y, SkWStream* content) { + SkPDFUtils::AppendScalar(x, content); + content->writeText(" "); + SkPDFUtils::AppendScalar(y, content); + content->writeText(" l\n"); +} + +static void append_cubic(SkScalar ctl1X, SkScalar ctl1Y, + SkScalar ctl2X, SkScalar ctl2Y, + SkScalar dstX, SkScalar dstY, SkWStream* content) { + SkString cmd("y\n"); + SkPDFUtils::AppendScalar(ctl1X, content); + content->writeText(" "); + SkPDFUtils::AppendScalar(ctl1Y, content); + content->writeText(" "); + if (ctl2X != dstX || ctl2Y != dstY) { + cmd.set("c\n"); + SkPDFUtils::AppendScalar(ctl2X, content); + content->writeText(" "); + SkPDFUtils::AppendScalar(ctl2Y, content); + content->writeText(" "); + } + SkPDFUtils::AppendScalar(dstX, content); + content->writeText(" "); + SkPDFUtils::AppendScalar(dstY, content); + content->writeText(" "); + content->writeText(cmd.c_str()); +} + +static void append_quad(const SkPoint quad[], SkWStream* content) { + SkPoint cubic[4]; + SkConvertQuadToCubic(quad, cubic); + append_cubic(cubic[1].fX, cubic[1].fY, cubic[2].fX, cubic[2].fY, + cubic[3].fX, cubic[3].fY, content); +} + +void SkPDFUtils::AppendRectangle(const SkRect& rect, SkWStream* content) { + // Skia has 0,0 at top left, pdf at bottom left. Do the right thing. + SkScalar bottom = std::min(rect.fBottom, rect.fTop); + + SkPDFUtils::AppendScalar(rect.fLeft, content); + content->writeText(" "); + SkPDFUtils::AppendScalar(bottom, content); + content->writeText(" "); + SkPDFUtils::AppendScalar(rect.width(), content); + content->writeText(" "); + SkPDFUtils::AppendScalar(rect.height(), content); + content->writeText(" re\n"); +} + +void SkPDFUtils::EmitPath(const SkPath& path, SkPaint::Style paintStyle, + bool doConsumeDegerates, SkWStream* content, + SkScalar tolerance) { + if (path.isEmpty() && SkPaint::kFill_Style == paintStyle) { + SkPDFUtils::AppendRectangle({0, 0, 0, 0}, content); + return; + } + // Filling a path with no area results in a drawing in PDF renderers but + // Chrome expects to be able to draw some such entities with no visible + // result, so we detect those cases and discard the drawing for them. + // Specifically: moveTo(X), lineTo(Y) and moveTo(X), lineTo(X), lineTo(Y). + + SkRect rect; + bool isClosed; // Both closure and direction need to be checked. + SkPathDirection direction; + if (path.isRect(&rect, &isClosed, &direction) && + isClosed && + (SkPathDirection::kCW == direction || + SkPathFillType::kEvenOdd == path.getFillType())) + { + SkPDFUtils::AppendRectangle(rect, content); + return; + } + + enum SkipFillState { + kEmpty_SkipFillState, + kSingleLine_SkipFillState, + kNonSingleLine_SkipFillState, + }; + SkipFillState fillState = kEmpty_SkipFillState; + //if (paintStyle != SkPaint::kFill_Style) { + // fillState = kNonSingleLine_SkipFillState; + //} + SkPoint lastMovePt = SkPoint::Make(0,0); + SkDynamicMemoryWStream currentSegment; + SkPoint args[4]; + SkPath::Iter iter(path, false); + for (SkPath::Verb verb = iter.next(args); + verb != SkPath::kDone_Verb; + verb = iter.next(args)) { + // args gets all the points, even the implicit first point. + switch (verb) { + case SkPath::kMove_Verb: + MoveTo(args[0].fX, args[0].fY, ¤tSegment); + lastMovePt = args[0]; + fillState = kEmpty_SkipFillState; + break; + case SkPath::kLine_Verb: + if (!doConsumeDegerates || !SkPathPriv::AllPointsEq(args, 2)) { + AppendLine(args[1].fX, args[1].fY, ¤tSegment); + if ((fillState == kEmpty_SkipFillState) && (args[0] != lastMovePt)) { + fillState = kSingleLine_SkipFillState; + break; + } + fillState = kNonSingleLine_SkipFillState; + } + break; + case SkPath::kQuad_Verb: + if (!doConsumeDegerates || !SkPathPriv::AllPointsEq(args, 3)) { + append_quad(args, ¤tSegment); + fillState = kNonSingleLine_SkipFillState; + } + break; + case SkPath::kConic_Verb: + if (!doConsumeDegerates || !SkPathPriv::AllPointsEq(args, 3)) { + SkAutoConicToQuads converter; + const SkPoint* quads = converter.computeQuads(args, iter.conicWeight(), tolerance); + for (int i = 0; i < converter.countQuads(); ++i) { + append_quad(&quads[i * 2], ¤tSegment); + } + fillState = kNonSingleLine_SkipFillState; + } + break; + case SkPath::kCubic_Verb: + if (!doConsumeDegerates || !SkPathPriv::AllPointsEq(args, 4)) { + append_cubic(args[1].fX, args[1].fY, args[2].fX, args[2].fY, + args[3].fX, args[3].fY, ¤tSegment); + fillState = kNonSingleLine_SkipFillState; + } + break; + case SkPath::kClose_Verb: + ClosePath(¤tSegment); + currentSegment.writeToStream(content); + currentSegment.reset(); + break; + default: + SkASSERT(false); + break; + } + } + if (currentSegment.bytesWritten() > 0) { + currentSegment.writeToStream(content); + } +} + +void SkPDFUtils::ClosePath(SkWStream* content) { + content->writeText("h\n"); +} + +void SkPDFUtils::PaintPath(SkPaint::Style style, SkPathFillType fill, SkWStream* content) { + if (style == SkPaint::kFill_Style) { + content->writeText("f"); + } else if (style == SkPaint::kStrokeAndFill_Style) { + content->writeText("B"); + } else if (style == SkPaint::kStroke_Style) { + content->writeText("S"); + } + + if (style != SkPaint::kStroke_Style) { + NOT_IMPLEMENTED(fill == SkPathFillType::kInverseEvenOdd, false); + NOT_IMPLEMENTED(fill == SkPathFillType::kInverseWinding, false); + if (fill == SkPathFillType::kEvenOdd) { + content->writeText("*"); + } + } + content->writeText("\n"); +} + +void SkPDFUtils::StrokePath(SkWStream* content) { + SkPDFUtils::PaintPath(SkPaint::kStroke_Style, SkPathFillType::kWinding, content); +} + +void SkPDFUtils::ApplyGraphicState(int objectIndex, SkWStream* content) { + SkPDFWriteResourceName(content, SkPDFResourceType::kExtGState, objectIndex); + content->writeText(" gs\n"); +} + +void SkPDFUtils::ApplyPattern(int objectIndex, SkWStream* content) { + // Select Pattern color space (CS, cs) and set pattern object as current + // color (SCN, scn) + content->writeText("/Pattern CS/Pattern cs"); + SkPDFWriteResourceName(content, SkPDFResourceType::kPattern, objectIndex); + content->writeText(" SCN"); + SkPDFWriteResourceName(content, SkPDFResourceType::kPattern, objectIndex); + content->writeText(" scn\n"); +} + +// return "x/pow(10, places)", given 0 0; --i) { + result[i] = '0' + x % 10; + x /= 10; + } + int j; + for (j = places; j > 1; --j) { + if (result[j] != '0') { + break; + } + } + result[j + 1] = '\0'; + return j + 1; +} + + +static constexpr int int_pow(int base, unsigned exp, int acc = 1) { + return exp < 1 ? acc + : int_pow(base * base, + exp / 2, + (exp % 2) ? acc * base : acc); +} + + +size_t SkPDFUtils::ColorToDecimalF(float value, char result[kFloatColorDecimalCount + 2]) { + static constexpr int kFactor = int_pow(10, kFloatColorDecimalCount); + int x = sk_float_round2int(value * kFactor); + if (x >= kFactor || x <= 0) { // clamp to 0-1 + result[0] = x > 0 ? '1' : '0'; + result[1] = '\0'; + return 1; + } + return print_permil_as_decimal(x, result, kFloatColorDecimalCount); +} + +size_t SkPDFUtils::ColorToDecimal(uint8_t value, char result[5]) { + if (value == 255 || value == 0) { + result[0] = value ? '1' : '0'; + result[1] = '\0'; + return 1; + } + // int x = 0.5 + (1000.0 / 255.0) * value; + int x = SkFixedRoundToInt((SK_Fixed1 * 1000 / 255) * value); + return print_permil_as_decimal(x, result, 3); +} + +bool SkPDFUtils::InverseTransformBBox(const SkMatrix& matrix, SkRect* bbox) { + SkMatrix inverse; + if (!matrix.invert(&inverse)) { + return false; + } + inverse.mapRect(bbox); + return true; +} + +void SkPDFUtils::PopulateTilingPatternDict(SkPDFDict* pattern, + SkRect& bbox, + std::unique_ptr resources, + const SkMatrix& matrix) { + const int kTiling_PatternType = 1; + const int kColoredTilingPattern_PaintType = 1; + const int kConstantSpacing_TilingType = 1; + + pattern->insertName("Type", "Pattern"); + pattern->insertInt("PatternType", kTiling_PatternType); + pattern->insertInt("PaintType", kColoredTilingPattern_PaintType); + pattern->insertInt("TilingType", kConstantSpacing_TilingType); + pattern->insertObject("BBox", SkPDFUtils::RectToArray(bbox)); + pattern->insertScalar("XStep", bbox.width()); + pattern->insertScalar("YStep", bbox.height()); + pattern->insertObject("Resources", std::move(resources)); + if (!matrix.isIdentity()) { + pattern->insertObject("Matrix", SkPDFUtils::MatrixToArray(matrix)); + } +} + +bool SkPDFUtils::ToBitmap(const SkImage* img, SkBitmap* dst) { + SkASSERT(img); + SkASSERT(dst); + SkBitmap bitmap; + // TODO: support GPU images + if(as_IB(img)->getROPixels(nullptr, &bitmap)) { + SkASSERT(bitmap.dimensions() == img->dimensions()); + SkASSERT(!bitmap.drawsNothing()); + *dst = std::move(bitmap); + return true; + } + return false; +} + +#ifdef SK_PDF_BASE85_BINARY +void SkPDFUtils::Base85Encode(std::unique_ptr stream, SkDynamicMemoryWStream* dst) { + SkASSERT(dst); + SkASSERT(stream); + dst->writeText("\n"); + int column = 0; + while (true) { + uint8_t src[4] = {0, 0, 0, 0}; + size_t count = stream->read(src, 4); + SkASSERT(count < 5); + if (0 == count) { + dst->writeText("~>\n"); + return; + } + uint32_t v = ((uint32_t)src[0] << 24) | ((uint32_t)src[1] << 16) | + ((uint32_t)src[2] << 8) | src[3]; + if (v == 0 && count == 4) { + dst->writeText("z"); + column += 1; + } else { + char buffer[5]; + for (int n = 4; n > 0; --n) { + buffer[n] = (v % 85) + '!'; + v /= 85; + } + buffer[0] = v + '!'; + dst->write(buffer, count + 1); + column += count + 1; + } + if (column > 74) { + dst->writeText("\n"); + column = 0; + } + } +} +#endif // SK_PDF_BASE85_BINARY + +void SkPDFUtils::AppendTransform(const SkMatrix& matrix, SkWStream* content) { + SkScalar values[6]; + if (!matrix.asAffine(values)) { + SkMatrix::SetAffineIdentity(values); + } + for (SkScalar v : values) { + SkPDFUtils::AppendScalar(v, content); + content->writeText(" "); + } + content->writeText("cm\n"); +} diff --git a/gfx/skia/skia/src/pdf/SkPDFUtils.h b/gfx/skia/skia/src/pdf/SkPDFUtils.h new file mode 100644 index 0000000000..2d6503b548 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkPDFUtils.h @@ -0,0 +1,137 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkPDFUtils_DEFINED +#define SkPDFUtils_DEFINED + +#include "include/core/SkPaint.h" +#include "include/core/SkPath.h" +#include "include/core/SkShader.h" +#include "include/core/SkStream.h" +#include "src/base/SkUTF.h" +#include "src/base/SkUtils.h" +#include "src/pdf/SkPDFTypes.h" +#include "src/shaders/SkShaderBase.h" +#include "src/utils/SkFloatToDecimal.h" + +class SkMatrix; +class SkPDFArray; +struct SkRect; + +template +bool SkPackedArrayEqual(T* u, T* v, size_t n) { + SkASSERT(u); + SkASSERT(v); + return 0 == memcmp(u, v, n * sizeof(T)); +} + +#if 0 +#define PRINT_NOT_IMPL(str) fprintf(stderr, str) +#else +#define PRINT_NOT_IMPL(str) +#endif + +#define NOT_IMPLEMENTED(condition, assert) \ + do { \ + if ((bool)(condition)) { \ + PRINT_NOT_IMPL("NOT_IMPLEMENTED: " #condition "\n"); \ + SkDEBUGCODE(SkASSERT(!assert);) \ + } \ + } while (0) + +namespace SkPDFUtils { + +const char* BlendModeName(SkBlendMode); + +std::unique_ptr RectToArray(const SkRect& rect); +std::unique_ptr MatrixToArray(const SkMatrix& matrix); + +void MoveTo(SkScalar x, SkScalar y, SkWStream* content); +void AppendLine(SkScalar x, SkScalar y, SkWStream* content); +void AppendRectangle(const SkRect& rect, SkWStream* content); +void EmitPath(const SkPath& path, SkPaint::Style paintStyle, + bool doConsumeDegerates, SkWStream* content, SkScalar tolerance = 0.25f); +inline void EmitPath(const SkPath& path, SkPaint::Style paintStyle, + SkWStream* content, SkScalar tolerance = 0.25f) { + SkPDFUtils::EmitPath(path, paintStyle, true, content, tolerance); +} +void ClosePath(SkWStream* content); +void PaintPath(SkPaint::Style style, SkPathFillType fill, SkWStream* content); +void StrokePath(SkWStream* content); +void ApplyGraphicState(int objectIndex, SkWStream* content); +void ApplyPattern(int objectIndex, SkWStream* content); + +// Converts (value / 255.0) with three significant digits of accuracy. +// Writes value as string into result. Returns strlen() of result. +size_t ColorToDecimal(uint8_t value, char result[5]); + +static constexpr unsigned kFloatColorDecimalCount = 4; +size_t ColorToDecimalF(float value, char result[kFloatColorDecimalCount + 2]); +inline void AppendColorComponent(uint8_t value, SkWStream* wStream) { + char buffer[5]; + size_t len = SkPDFUtils::ColorToDecimal(value, buffer); + wStream->write(buffer, len); +} +inline void AppendColorComponentF(float value, SkWStream* wStream) { + char buffer[kFloatColorDecimalCount + 2]; + size_t len = SkPDFUtils::ColorToDecimalF(value, buffer); + wStream->write(buffer, len); +} + +inline void AppendScalar(SkScalar value, SkWStream* stream) { + char result[kMaximumSkFloatToDecimalLength]; + size_t len = SkFloatToDecimal(SkScalarToFloat(value), result); + SkASSERT(len < kMaximumSkFloatToDecimalLength); + stream->write(result, len); +} + +inline void WriteUInt16BE(SkWStream* wStream, uint16_t value) { + char result[4] = { SkHexadecimalDigits::gUpper[ value >> 12 ], + SkHexadecimalDigits::gUpper[0xF & (value >> 8 )], + SkHexadecimalDigits::gUpper[0xF & (value >> 4 )], + SkHexadecimalDigits::gUpper[0xF & (value )] }; + wStream->write(result, 4); +} + +inline void WriteUInt8(SkWStream* wStream, uint8_t value) { + char result[2] = { SkHexadecimalDigits::gUpper[value >> 4], + SkHexadecimalDigits::gUpper[value & 0xF] }; + wStream->write(result, 2); +} + +inline void WriteUTF16beHex(SkWStream* wStream, SkUnichar utf32) { + uint16_t utf16[2] = {0, 0}; + size_t len = SkUTF::ToUTF16(utf32, utf16); + SkASSERT(len == 1 || len == 2); + SkPDFUtils::WriteUInt16BE(wStream, utf16[0]); + if (len == 2) { + SkPDFUtils::WriteUInt16BE(wStream, utf16[1]); + } +} + +inline SkMatrix GetShaderLocalMatrix(const SkShader* shader) { + SkMatrix localMatrix; + if (sk_sp s = as_SB(shader)->makeAsALocalMatrixShader(&localMatrix)) { + return localMatrix; + } + return SkMatrix::I(); +} +bool InverseTransformBBox(const SkMatrix& matrix, SkRect* bbox); +void PopulateTilingPatternDict(SkPDFDict* pattern, + SkRect& bbox, + std::unique_ptr resources, + const SkMatrix& matrix); + +bool ToBitmap(const SkImage* img, SkBitmap* dst); + +#ifdef SK_PDF_BASE85_BINARY +void Base85Encode(std::unique_ptr src, SkDynamicMemoryWStream* dst); +#endif // SK_PDF_BASE85_BINARY + +void AppendTransform(const SkMatrix&, SkWStream*); +} // namespace SkPDFUtils + +#endif diff --git a/gfx/skia/skia/src/pdf/SkUUID.h b/gfx/skia/skia/src/pdf/SkUUID.h new file mode 100644 index 0000000000..3d81865dc0 --- /dev/null +++ b/gfx/skia/skia/src/pdf/SkUUID.h @@ -0,0 +1,18 @@ +// Copyright 2018 Google LLC. +// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. +#ifndef SkUUID_DEFINED +#define SkUUID_DEFINED + +#include +#include + +struct SkUUID { + uint8_t fData[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; +}; + +static inline bool operator==(const SkUUID& u, const SkUUID& v) { + return 0 == memcmp(u.fData, v.fData, sizeof(u.fData)); +} +static inline bool operator!=(const SkUUID& u, const SkUUID& v) { return !(u == v); } + +#endif // SkUUID_DEFINED diff --git a/gfx/skia/skia/src/ports/SkDebug_android.cpp b/gfx/skia/skia/src/ports/SkDebug_android.cpp new file mode 100644 index 0000000000..49ba4ae7f7 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkDebug_android.cpp @@ -0,0 +1,38 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_ANDROID) + +#include + +#ifdef LOG_TAG + #undef LOG_TAG +#endif +#define LOG_TAG "skia" +#include + +// Print debug output to stdout as well. This is useful for command line +// applications (e.g. skia_launcher). +bool gSkDebugToStdOut = false; + +void SkDebugf(const char format[], ...) { + va_list args1, args2; + va_start(args1, format); + + if (gSkDebugToStdOut) { + va_copy(args2, args1); + vprintf(format, args2); + va_end(args2); + } + + __android_log_vprint(ANDROID_LOG_DEBUG, LOG_TAG, format, args1); + + va_end(args1); +} + +#endif//defined(SK_BUILD_FOR_ANDROID) diff --git a/gfx/skia/skia/src/ports/SkDebug_stdio.cpp b/gfx/skia/skia/src/ports/SkDebug_stdio.cpp new file mode 100644 index 0000000000..78c7072bd0 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkDebug_stdio.cpp @@ -0,0 +1,25 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkFeatures.h" +#include "include/private/base/SkLoadUserConfig.h" + +#if !defined(SK_BUILD_FOR_WIN) && !defined(SK_BUILD_FOR_ANDROID) + +#include +#include + +void SkDebugf(const char format[], ...) { + va_list args; + va_start(args, format); +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wformat-nonliteral" + vfprintf(stderr, format, args); +#pragma GCC diagnostic pop + va_end(args); +} +#endif//!defined(SK_BUILD_FOR_WIN) && !defined(SK_BUILD_FOR_ANDROID) diff --git a/gfx/skia/skia/src/ports/SkDebug_win.cpp b/gfx/skia/skia/src/ports/SkDebug_win.cpp new file mode 100644 index 0000000000..1ad754e624 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkDebug_win.cpp @@ -0,0 +1,34 @@ +/* + * Copyright 2010 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#if defined(SK_BUILD_FOR_WIN) + +#include "src/base/SkLeanWindows.h" + +#include +#include + +static const size_t kBufferSize = 2048; + +void SkDebugf(const char format[], ...) { + char buffer[kBufferSize + 1]; + va_list args; + + va_start(args, format); + vfprintf(stderr, format, args); + va_end(args); + fflush(stderr); // stderr seems to be buffered on Windows. + + va_start(args, format); + vsnprintf(buffer, kBufferSize, format, args); + va_end(args); + + OutputDebugStringA(buffer); +} +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkDiscardableMemory_none.cpp b/gfx/skia/skia/src/ports/SkDiscardableMemory_none.cpp new file mode 100644 index 0000000000..eeb64cade6 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkDiscardableMemory_none.cpp @@ -0,0 +1,14 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/chromium/SkDiscardableMemory.h" +#include "src/lazy/SkDiscardableMemoryPool.h" + +SkDiscardableMemory* SkDiscardableMemory::Create(size_t bytes) { + return SkGetGlobalDiscardableMemoryPool()->create(bytes); +} diff --git a/gfx/skia/skia/src/ports/SkFontConfigInterface.cpp b/gfx/skia/skia/src/ports/SkFontConfigInterface.cpp new file mode 100644 index 0000000000..7747f9126c --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontConfigInterface.cpp @@ -0,0 +1,33 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/core/SkRefCnt.h" +#include "include/ports/SkFontConfigInterface.h" +#include "include/private/base/SkMutex.h" + +static SkMutex& font_config_interface_mutex() { + static SkMutex& mutex = *(new SkMutex); + return mutex; +} +static SkFontConfigInterface* gFontConfigInterface; + +sk_sp SkFontConfigInterface::RefGlobal() { + SkAutoMutexExclusive ac(font_config_interface_mutex()); + + if (gFontConfigInterface) { + return sk_ref_sp(gFontConfigInterface); + } + return sk_ref_sp(SkFontConfigInterface::GetSingletonDirectInterface()); +} + +void SkFontConfigInterface::SetGlobal(sk_sp fc) { + SkAutoMutexExclusive ac(font_config_interface_mutex()); + + SkSafeUnref(gFontConfigInterface); + gFontConfigInterface = fc.release(); +} diff --git a/gfx/skia/skia/src/ports/SkFontConfigInterface_direct.cpp b/gfx/skia/skia/src/ports/SkFontConfigInterface_direct.cpp new file mode 100644 index 0000000000..f735f4302b --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontConfigInterface_direct.cpp @@ -0,0 +1,709 @@ +/* + * Copyright 2009-2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* migrated from chrome/src/skia/ext/SkFontHost_fontconfig_direct.cpp */ + +#include "include/core/SkFontStyle.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkAutoMalloc.h" +#include "src/base/SkBuffer.h" +#include "src/ports/SkFontConfigInterface_direct.h" + +#include +#include + +namespace { + +// FontConfig was thread antagonistic until 2.10.91 with known thread safety issues until 2.13.93. +// Before that, lock with a global mutex. +// See https://bug.skia.org/1497 and cl/339089311 for background. +static SkMutex& f_c_mutex() { + static SkMutex& mutex = *(new SkMutex); + return mutex; +} + +struct FCLocker { + inline static constexpr int FontConfigThreadSafeVersion = 21393; + + // Assume FcGetVersion() has always been thread safe. + FCLocker() { + if (FcGetVersion() < FontConfigThreadSafeVersion) { + f_c_mutex().acquire(); + } + } + + ~FCLocker() { + AssertHeld(); + if (FcGetVersion() < FontConfigThreadSafeVersion) { + f_c_mutex().release(); + } + } + + static void AssertHeld() { SkDEBUGCODE( + if (FcGetVersion() < FontConfigThreadSafeVersion) { + f_c_mutex().assertHeld(); + } + ) } +}; + +using UniqueFCConfig = std::unique_ptr>; + +} // namespace + +size_t SkFontConfigInterface::FontIdentity::writeToMemory(void* addr) const { + size_t size = sizeof(fID) + sizeof(fTTCIndex); + size += sizeof(int32_t) + sizeof(int32_t) + sizeof(uint8_t); // weight, width, italic + size += sizeof(int32_t) + fString.size(); // store length+data + if (addr) { + SkWBuffer buffer(addr, size); + + buffer.write32(fID); + buffer.write32(fTTCIndex); + buffer.write32(fString.size()); + buffer.write32(fStyle.weight()); + buffer.write32(fStyle.width()); + buffer.write8(fStyle.slant()); + buffer.write(fString.c_str(), fString.size()); + buffer.padToAlign4(); + + SkASSERT(buffer.pos() == size); + } + return size; +} + +size_t SkFontConfigInterface::FontIdentity::readFromMemory(const void* addr, + size_t size) { + SkRBuffer buffer(addr, size); + + (void)buffer.readU32(&fID); + (void)buffer.readS32(&fTTCIndex); + uint32_t strLen, weight, width; + (void)buffer.readU32(&strLen); + (void)buffer.readU32(&weight); + (void)buffer.readU32(&width); + uint8_t u8; + (void)buffer.readU8(&u8); + SkFontStyle::Slant slant = (SkFontStyle::Slant)u8; + fStyle = SkFontStyle(weight, width, slant); + fString.resize(strLen); + (void)buffer.read(fString.data(), strLen); + buffer.skipToAlign4(); + + return buffer.pos(); // the actual number of bytes read +} + +#ifdef SK_DEBUG +static void make_iden(SkFontConfigInterface::FontIdentity* iden) { + iden->fID = 10; + iden->fTTCIndex = 2; + iden->fString.set("Hello world"); + iden->fStyle = SkFontStyle(300, 6, SkFontStyle::kItalic_Slant); +} + +static void test_writeToMemory(const SkFontConfigInterface::FontIdentity& iden0, + int initValue) { + SkFontConfigInterface::FontIdentity iden1; + + size_t size0 = iden0.writeToMemory(nullptr); + + SkAutoMalloc storage(size0); + memset(storage.get(), initValue, size0); + + size_t size1 = iden0.writeToMemory(storage.get()); + SkASSERT(size0 == size1); + + SkASSERT(iden0 != iden1); + size_t size2 = iden1.readFromMemory(storage.get(), size1); + SkASSERT(size2 == size1); + SkASSERT(iden0 == iden1); +} + +static void fontconfiginterface_unittest() { + SkFontConfigInterface::FontIdentity iden0, iden1; + + SkASSERT(iden0 == iden1); + + make_iden(&iden0); + SkASSERT(iden0 != iden1); + + make_iden(&iden1); + SkASSERT(iden0 == iden1); + + test_writeToMemory(iden0, 0); + test_writeToMemory(iden0, 0); +} +#endif + +/////////////////////////////////////////////////////////////////////////////// + +// Returns the string from the pattern, or nullptr +static const char* get_string(FcPattern* pattern, const char field[], int index = 0) { + const char* name; + if (FcPatternGetString(pattern, field, index, (FcChar8**)&name) != FcResultMatch) { + name = nullptr; + } + return name; +} + +/////////////////////////////////////////////////////////////////////////////// + +namespace { + +// Equivalence classes, used to match the Liberation and other fonts +// with their metric-compatible replacements. See the discussion in +// GetFontEquivClass(). +enum FontEquivClass +{ + OTHER, + SANS, + SERIF, + MONO, + SYMBOL, + PGOTHIC, + GOTHIC, + PMINCHO, + MINCHO, + SIMSUN, + NSIMSUN, + SIMHEI, + PMINGLIU, + MINGLIU, + PMINGLIUHK, + MINGLIUHK, + CAMBRIA, + CALIBRI, +}; + +// Match the font name against a whilelist of fonts, returning the equivalence +// class. +FontEquivClass GetFontEquivClass(const char* fontname) +{ + // It would be nice for fontconfig to tell us whether a given suggested + // replacement is a "strong" match (that is, an equivalent font) or + // a "weak" match (that is, fontconfig's next-best attempt at finding a + // substitute). However, I played around with the fontconfig API for + // a good few hours and could not make it reveal this information. + // + // So instead, we hardcode. Initially this function emulated + // /etc/fonts/conf.d/30-metric-aliases.conf + // from my Ubuntu system, but we're better off being very conservative. + + // Arimo, Tinos and Cousine are a set of fonts metric-compatible with + // Arial, Times New Roman and Courier New with a character repertoire + // much larger than Liberation. Note that Cousine is metrically + // compatible with Courier New, but the former is sans-serif while + // the latter is serif. + + + struct FontEquivMap { + FontEquivClass clazz; + const char name[40]; + }; + + static const FontEquivMap kFontEquivMap[] = { + { SANS, "Arial" }, + { SANS, "Arimo" }, + { SANS, "Liberation Sans" }, + + { SERIF, "Times New Roman" }, + { SERIF, "Tinos" }, + { SERIF, "Liberation Serif" }, + + { MONO, "Courier New" }, + { MONO, "Cousine" }, + { MONO, "Liberation Mono" }, + + { SYMBOL, "Symbol" }, + { SYMBOL, "Symbol Neu" }, + + // ＭＳ Ｐゴシック + { PGOTHIC, "MS PGothic" }, + { PGOTHIC, "\xef\xbc\xad\xef\xbc\xb3 \xef\xbc\xb0" + "\xe3\x82\xb4\xe3\x82\xb7\xe3\x83\x83\xe3\x82\xaf" }, + { PGOTHIC, "Noto Sans CJK JP" }, + { PGOTHIC, "IPAPGothic" }, + { PGOTHIC, "MotoyaG04Gothic" }, + + // ＭＳ ゴシック + { GOTHIC, "MS Gothic" }, + { GOTHIC, "\xef\xbc\xad\xef\xbc\xb3 " + "\xe3\x82\xb4\xe3\x82\xb7\xe3\x83\x83\xe3\x82\xaf" }, + { GOTHIC, "Noto Sans Mono CJK JP" }, + { GOTHIC, "IPAGothic" }, + { GOTHIC, "MotoyaG04GothicMono" }, + + // ＭＳ Ｐ明朝 + { PMINCHO, "MS PMincho" }, + { PMINCHO, "\xef\xbc\xad\xef\xbc\xb3 \xef\xbc\xb0" + "\xe6\x98\x8e\xe6\x9c\x9d"}, + { PMINCHO, "Noto Serif CJK JP" }, + { PMINCHO, "IPAPMincho" }, + { PMINCHO, "MotoyaG04Mincho" }, + + // ＭＳ 明朝 + { MINCHO, "MS Mincho" }, + { MINCHO, "\xef\xbc\xad\xef\xbc\xb3 \xe6\x98\x8e\xe6\x9c\x9d" }, + { MINCHO, "Noto Serif CJK JP" }, + { MINCHO, "IPAMincho" }, + { MINCHO, "MotoyaG04MinchoMono" }, + + // 宋体 + { SIMSUN, "Simsun" }, + { SIMSUN, "\xe5\xae\x8b\xe4\xbd\x93" }, + { SIMSUN, "Noto Serif CJK SC" }, + { SIMSUN, "MSung GB18030" }, + { SIMSUN, "Song ASC" }, + + // 新宋体 + { NSIMSUN, "NSimsun" }, + { NSIMSUN, "\xe6\x96\xb0\xe5\xae\x8b\xe4\xbd\x93" }, + { NSIMSUN, "Noto Serif CJK SC" }, + { NSIMSUN, "MSung GB18030" }, + { NSIMSUN, "N Song ASC" }, + + // 黑体 + { SIMHEI, "Simhei" }, + { SIMHEI, "\xe9\xbb\x91\xe4\xbd\x93" }, + { SIMHEI, "Noto Sans CJK SC" }, + { SIMHEI, "MYingHeiGB18030" }, + { SIMHEI, "MYingHeiB5HK" }, + + // 新細明體 + { PMINGLIU, "PMingLiU"}, + { PMINGLIU, "\xe6\x96\xb0\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94" }, + { PMINGLIU, "Noto Serif CJK TC"}, + { PMINGLIU, "MSung B5HK"}, + + // 細明體 + { MINGLIU, "MingLiU"}, + { MINGLIU, "\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94" }, + { MINGLIU, "Noto Serif CJK TC"}, + { MINGLIU, "MSung B5HK"}, + + // 新細明體 + { PMINGLIUHK, "PMingLiU_HKSCS"}, + { PMINGLIUHK, "\xe6\x96\xb0\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94_HKSCS" }, + { PMINGLIUHK, "Noto Serif CJK TC"}, + { PMINGLIUHK, "MSung B5HK"}, + + // 細明體 + { MINGLIUHK, "MingLiU_HKSCS"}, + { MINGLIUHK, "\xe7\xb4\xb0\xe6\x98\x8e\xe9\xab\x94_HKSCS" }, + { MINGLIUHK, "Noto Serif CJK TC"}, + { MINGLIUHK, "MSung B5HK"}, + + // Cambria + { CAMBRIA, "Cambria" }, + { CAMBRIA, "Caladea" }, + + // Calibri + { CALIBRI, "Calibri" }, + { CALIBRI, "Carlito" }, + }; + + static const size_t kFontCount = + sizeof(kFontEquivMap)/sizeof(kFontEquivMap[0]); + + // TODO(jungshik): If this loop turns out to be hot, turn + // the array to a static (hash)map to speed it up. + for (size_t i = 0; i < kFontCount; ++i) { + if (strcasecmp(kFontEquivMap[i].name, fontname) == 0) + return kFontEquivMap[i].clazz; + } + return OTHER; +} + + +// Return true if |font_a| and |font_b| are visually and at the metrics +// level interchangeable. +bool IsMetricCompatibleReplacement(const char* font_a, const char* font_b) +{ + FontEquivClass class_a = GetFontEquivClass(font_a); + FontEquivClass class_b = GetFontEquivClass(font_b); + + return class_a != OTHER && class_a == class_b; +} + +// Normally we only return exactly the font asked for. In last-resort +// cases, the request either doesn't specify a font or is one of the +// basic font names like "Sans", "Serif" or "Monospace". This function +// tells you whether a given request is for such a fallback. +bool IsFallbackFontAllowed(const SkString& family) { + const char* family_cstr = family.c_str(); + return family.isEmpty() || + strcasecmp(family_cstr, "sans") == 0 || + strcasecmp(family_cstr, "serif") == 0 || + strcasecmp(family_cstr, "monospace") == 0; +} + +// Retrieves |is_bold|, |is_italic| and |font_family| properties from |font|. +static int get_int(FcPattern* pattern, const char object[], int missing) { + int value; + if (FcPatternGetInteger(pattern, object, 0, &value) != FcResultMatch) { + return missing; + } + return value; +} + +static int map_range(SkScalar value, + SkScalar old_min, SkScalar old_max, + SkScalar new_min, SkScalar new_max) +{ + SkASSERT(old_min < old_max); + SkASSERT(new_min <= new_max); + return new_min + ((value - old_min) * (new_max - new_min) / (old_max - old_min)); +} + +struct MapRanges { + SkScalar old_val; + SkScalar new_val; +}; + +static SkScalar map_ranges(SkScalar val, MapRanges const ranges[], int rangesCount) { + // -Inf to [0] + if (val < ranges[0].old_val) { + return ranges[0].new_val; + } + + // Linear from [i] to [i+1] + for (int i = 0; i < rangesCount - 1; ++i) { + if (val < ranges[i+1].old_val) { + return map_range(val, ranges[i].old_val, ranges[i+1].old_val, + ranges[i].new_val, ranges[i+1].new_val); + } + } + + // From [n] to +Inf + // if (fcweight < Inf) + return ranges[rangesCount-1].new_val; +} + +#ifndef FC_WEIGHT_DEMILIGHT +#define FC_WEIGHT_DEMILIGHT 65 +#endif + +static SkFontStyle skfontstyle_from_fcpattern(FcPattern* pattern) { + typedef SkFontStyle SkFS; + + static constexpr MapRanges weightRanges[] = { + { FC_WEIGHT_THIN, SkFS::kThin_Weight }, + { FC_WEIGHT_EXTRALIGHT, SkFS::kExtraLight_Weight }, + { FC_WEIGHT_LIGHT, SkFS::kLight_Weight }, + { FC_WEIGHT_DEMILIGHT, 350 }, + { FC_WEIGHT_BOOK, 380 }, + { FC_WEIGHT_REGULAR, SkFS::kNormal_Weight }, + { FC_WEIGHT_MEDIUM, SkFS::kMedium_Weight }, + { FC_WEIGHT_DEMIBOLD, SkFS::kSemiBold_Weight }, + { FC_WEIGHT_BOLD, SkFS::kBold_Weight }, + { FC_WEIGHT_EXTRABOLD, SkFS::kExtraBold_Weight }, + { FC_WEIGHT_BLACK, SkFS::kBlack_Weight }, + { FC_WEIGHT_EXTRABLACK, SkFS::kExtraBlack_Weight }, + }; + SkScalar weight = map_ranges(get_int(pattern, FC_WEIGHT, FC_WEIGHT_REGULAR), + weightRanges, std::size(weightRanges)); + + static constexpr MapRanges widthRanges[] = { + { FC_WIDTH_ULTRACONDENSED, SkFS::kUltraCondensed_Width }, + { FC_WIDTH_EXTRACONDENSED, SkFS::kExtraCondensed_Width }, + { FC_WIDTH_CONDENSED, SkFS::kCondensed_Width }, + { FC_WIDTH_SEMICONDENSED, SkFS::kSemiCondensed_Width }, + { FC_WIDTH_NORMAL, SkFS::kNormal_Width }, + { FC_WIDTH_SEMIEXPANDED, SkFS::kSemiExpanded_Width }, + { FC_WIDTH_EXPANDED, SkFS::kExpanded_Width }, + { FC_WIDTH_EXTRAEXPANDED, SkFS::kExtraExpanded_Width }, + { FC_WIDTH_ULTRAEXPANDED, SkFS::kUltraExpanded_Width }, + }; + SkScalar width = map_ranges(get_int(pattern, FC_WIDTH, FC_WIDTH_NORMAL), + widthRanges, std::size(widthRanges)); + + SkFS::Slant slant = SkFS::kUpright_Slant; + switch (get_int(pattern, FC_SLANT, FC_SLANT_ROMAN)) { + case FC_SLANT_ROMAN: slant = SkFS::kUpright_Slant; break; + case FC_SLANT_ITALIC : slant = SkFS::kItalic_Slant ; break; + case FC_SLANT_OBLIQUE: slant = SkFS::kOblique_Slant; break; + default: SkASSERT(false); break; + } + + return SkFontStyle(SkScalarRoundToInt(weight), SkScalarRoundToInt(width), slant); +} + +static void fcpattern_from_skfontstyle(SkFontStyle style, FcPattern* pattern) { + typedef SkFontStyle SkFS; + + static constexpr MapRanges weightRanges[] = { + { SkFS::kThin_Weight, FC_WEIGHT_THIN }, + { SkFS::kExtraLight_Weight, FC_WEIGHT_EXTRALIGHT }, + { SkFS::kLight_Weight, FC_WEIGHT_LIGHT }, + { 350, FC_WEIGHT_DEMILIGHT }, + { 380, FC_WEIGHT_BOOK }, + { SkFS::kNormal_Weight, FC_WEIGHT_REGULAR }, + { SkFS::kMedium_Weight, FC_WEIGHT_MEDIUM }, + { SkFS::kSemiBold_Weight, FC_WEIGHT_DEMIBOLD }, + { SkFS::kBold_Weight, FC_WEIGHT_BOLD }, + { SkFS::kExtraBold_Weight, FC_WEIGHT_EXTRABOLD }, + { SkFS::kBlack_Weight, FC_WEIGHT_BLACK }, + { SkFS::kExtraBlack_Weight, FC_WEIGHT_EXTRABLACK }, + }; + int weight = map_ranges(style.weight(), weightRanges, std::size(weightRanges)); + + static constexpr MapRanges widthRanges[] = { + { SkFS::kUltraCondensed_Width, FC_WIDTH_ULTRACONDENSED }, + { SkFS::kExtraCondensed_Width, FC_WIDTH_EXTRACONDENSED }, + { SkFS::kCondensed_Width, FC_WIDTH_CONDENSED }, + { SkFS::kSemiCondensed_Width, FC_WIDTH_SEMICONDENSED }, + { SkFS::kNormal_Width, FC_WIDTH_NORMAL }, + { SkFS::kSemiExpanded_Width, FC_WIDTH_SEMIEXPANDED }, + { SkFS::kExpanded_Width, FC_WIDTH_EXPANDED }, + { SkFS::kExtraExpanded_Width, FC_WIDTH_EXTRAEXPANDED }, + { SkFS::kUltraExpanded_Width, FC_WIDTH_ULTRAEXPANDED }, + }; + int width = map_ranges(style.width(), widthRanges, std::size(widthRanges)); + + int slant = FC_SLANT_ROMAN; + switch (style.slant()) { + case SkFS::kUpright_Slant: slant = FC_SLANT_ROMAN ; break; + case SkFS::kItalic_Slant : slant = FC_SLANT_ITALIC ; break; + case SkFS::kOblique_Slant: slant = FC_SLANT_OBLIQUE; break; + default: SkASSERT(false); break; + } + + FcPatternAddInteger(pattern, FC_WEIGHT, weight); + FcPatternAddInteger(pattern, FC_WIDTH , width); + FcPatternAddInteger(pattern, FC_SLANT , slant); +} + +} // anonymous namespace + +/////////////////////////////////////////////////////////////////////////////// + +#define kMaxFontFamilyLength 2048 +#ifdef SK_FONT_CONFIG_INTERFACE_ONLY_ALLOW_SFNT_FONTS +const char* kFontFormatTrueType = "TrueType"; +const char* kFontFormatCFF = "CFF"; +#endif + +SkFontConfigInterfaceDirect::SkFontConfigInterfaceDirect(FcConfig* fc) : fFC(fc) +{ + SkDEBUGCODE(fontconfiginterface_unittest();) +} + +SkFontConfigInterfaceDirect::~SkFontConfigInterfaceDirect() { + if (fFC) { + FcConfigDestroy(fFC); + } +} + +bool SkFontConfigInterfaceDirect::isAccessible(const char* filename) { + if (access(filename, R_OK) != 0) { + return false; + } + return true; +} + +bool SkFontConfigInterfaceDirect::isValidPattern(FcPattern* pattern) { +#ifdef SK_FONT_CONFIG_INTERFACE_ONLY_ALLOW_SFNT_FONTS + const char* font_format = get_string(pattern, FC_FONTFORMAT); + if (font_format + && 0 != strcmp(font_format, kFontFormatTrueType) + && 0 != strcmp(font_format, kFontFormatCFF)) + { + return false; + } +#endif + + // fontconfig can also return fonts which are unreadable + const char* c_filename = get_string(pattern, FC_FILE); + if (!c_filename) { + return false; + } + + FcConfig* fc = fFC; + UniqueFCConfig fcStorage; + if (!fc) { + fcStorage.reset(FcConfigReference(nullptr)); + fc = fcStorage.get(); + } + + const char* sysroot = (const char*)FcConfigGetSysRoot(fc); + SkString resolvedFilename; + if (sysroot) { + resolvedFilename = sysroot; + resolvedFilename += c_filename; + c_filename = resolvedFilename.c_str(); + } + return this->isAccessible(c_filename); +} + +// Find matching font from |font_set| for the given font family. +FcPattern* SkFontConfigInterfaceDirect::MatchFont(FcFontSet* font_set, + const char* post_config_family, + const SkString& family) { + // Older versions of fontconfig have a bug where they cannot select + // only scalable fonts so we have to manually filter the results. + FcPattern* match = nullptr; + for (int i = 0; i < font_set->nfont; ++i) { + FcPattern* current = font_set->fonts[i]; + if (this->isValidPattern(current)) { + match = current; + break; + } + } + + if (match && !IsFallbackFontAllowed(family)) { + bool acceptable_substitute = false; + for (int id = 0; id < 255; ++id) { + const char* post_match_family = get_string(match, FC_FAMILY, id); + if (!post_match_family) + break; + acceptable_substitute = + (strcasecmp(post_config_family, post_match_family) == 0 || + // Workaround for Issue 12530: + // requested family: "Bitstream Vera Sans" + // post_config_family: "Arial" + // post_match_family: "Bitstream Vera Sans" + // -> We should treat this case as a good match. + strcasecmp(family.c_str(), post_match_family) == 0) || + IsMetricCompatibleReplacement(family.c_str(), post_match_family); + if (acceptable_substitute) + break; + } + if (!acceptable_substitute) + return nullptr; + } + + return match; +} + +bool SkFontConfigInterfaceDirect::matchFamilyName(const char familyName[], + SkFontStyle style, + FontIdentity* outIdentity, + SkString* outFamilyName, + SkFontStyle* outStyle) { + SkString familyStr(familyName ? familyName : ""); + if (familyStr.size() > kMaxFontFamilyLength) { + return false; + } + + FcConfig* fc = fFC; + UniqueFCConfig fcStorage; + if (!fc) { + fcStorage.reset(FcConfigReference(nullptr)); + fc = fcStorage.get(); + } + + FCLocker lock; + FcPattern* pattern = FcPatternCreate(); + + if (familyName) { + FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName); + } + fcpattern_from_skfontstyle(style, pattern); + + FcPatternAddBool(pattern, FC_SCALABLE, FcTrue); + + FcConfigSubstitute(fc, pattern, FcMatchPattern); + FcDefaultSubstitute(pattern); + + // Font matching: + // CSS often specifies a fallback list of families: + // font-family: a, b, c, serif; + // However, fontconfig will always do its best to find *a* font when asked + // for something so we need a way to tell if the match which it has found is + // "good enough" for us. Otherwise, we can return nullptr which gets piped up + // and lets WebKit know to try the next CSS family name. However, fontconfig + // configs allow substitutions (mapping "Arial -> Helvetica" etc) and we + // wish to support that. + // + // Thus, if a specific family is requested we set @family_requested. Then we + // record two strings: the family name after config processing and the + // family name after resolving. If the two are equal, it's a good match. + // + // So consider the case where a user has mapped Arial to Helvetica in their + // config. + // requested family: "Arial" + // post_config_family: "Helvetica" + // post_match_family: "Helvetica" + // -> good match + // + // and for a missing font: + // requested family: "Monaco" + // post_config_family: "Monaco" + // post_match_family: "Times New Roman" + // -> BAD match + // + // However, we special-case fallback fonts; see IsFallbackFontAllowed(). + + const char* post_config_family = get_string(pattern, FC_FAMILY); + if (!post_config_family) { + // we can just continue with an empty name, e.g. default font + post_config_family = ""; + } + + FcResult result; + FcFontSet* font_set = FcFontSort(fc, pattern, 0, nullptr, &result); + if (!font_set) { + FcPatternDestroy(pattern); + return false; + } + + FcPattern* match = this->MatchFont(font_set, post_config_family, familyStr); + if (!match) { + FcPatternDestroy(pattern); + FcFontSetDestroy(font_set); + return false; + } + + FcPatternDestroy(pattern); + + // From here out we just extract our results from 'match' + + post_config_family = get_string(match, FC_FAMILY); + if (!post_config_family) { + FcFontSetDestroy(font_set); + return false; + } + + const char* c_filename = get_string(match, FC_FILE); + if (!c_filename) { + FcFontSetDestroy(font_set); + return false; + } + const char* sysroot = (const char*)FcConfigGetSysRoot(fc); + SkString resolvedFilename; + if (sysroot) { + resolvedFilename = sysroot; + resolvedFilename += c_filename; + c_filename = resolvedFilename.c_str(); + } + + int face_index = get_int(match, FC_INDEX, 0); + + FcFontSetDestroy(font_set); + + if (outIdentity) { + outIdentity->fTTCIndex = face_index; + outIdentity->fString.set(c_filename); + } + if (outFamilyName) { + outFamilyName->set(post_config_family); + } + if (outStyle) { + *outStyle = skfontstyle_from_fcpattern(match); + } + return true; +} + +SkStreamAsset* SkFontConfigInterfaceDirect::openStream(const FontIdentity& identity) { + return SkStream::MakeFromFile(identity.fString.c_str()).release(); +} diff --git a/gfx/skia/skia/src/ports/SkFontConfigInterface_direct.h b/gfx/skia/skia/src/ports/SkFontConfigInterface_direct.h new file mode 100644 index 0000000000..e0f3127ed4 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontConfigInterface_direct.h @@ -0,0 +1,44 @@ +/* + * Copyright 2009-2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* migrated from chrome/src/skia/ext/SkFontHost_fontconfig_direct.cpp */ +#ifndef SKFONTCONFIGINTERFACE_DIRECT_H_ +#define SKFONTCONFIGINTERFACE_DIRECT_H_ + +#include "include/ports/SkFontConfigInterface.h" + +#include + +class SkFontConfigInterfaceDirect : public SkFontConfigInterface { +public: + /** Create around a FontConfig instance. + * If 'fc' is nullptr, each method call will use the current config. + * Takes ownership of 'fc' and will call FcConfigDestroy on it. + */ + SkFontConfigInterfaceDirect(FcConfig* fc); + ~SkFontConfigInterfaceDirect() override; + + bool matchFamilyName(const char familyName[], + SkFontStyle requested, + FontIdentity* outFontIdentifier, + SkString* outFamilyName, + SkFontStyle* outStyle) override; + + SkStreamAsset* openStream(const FontIdentity&) override; + +protected: + virtual bool isAccessible(const char* filename); + +private: + FcConfig * const fFC; + bool isValidPattern(FcPattern* pattern); + FcPattern* MatchFont(FcFontSet* font_set, const char* post_config_family, + const SkString& family); + using INHERITED = SkFontConfigInterface; +}; + +#endif diff --git a/gfx/skia/skia/src/ports/SkFontConfigInterface_direct_factory.cpp b/gfx/skia/skia/src/ports/SkFontConfigInterface_direct_factory.cpp new file mode 100644 index 0000000000..19234788f5 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontConfigInterface_direct_factory.cpp @@ -0,0 +1,16 @@ +/* + * Copyright 2009-2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkOnce.h" +#include "src/ports/SkFontConfigInterface_direct.h" + +SkFontConfigInterface* SkFontConfigInterface::GetSingletonDirectInterface() { + static SkFontConfigInterface* singleton; + static SkOnce once; + once([]{ singleton = new SkFontConfigInterfaceDirect(nullptr); }); + return singleton; +} diff --git a/gfx/skia/skia/src/ports/SkFontConfigTypeface.h b/gfx/skia/skia/src/ports/SkFontConfigTypeface.h new file mode 100644 index 0000000000..79550499df --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontConfigTypeface.h @@ -0,0 +1,66 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontConfigTypeface_DEFINED +#define SkFontConfigTypeface_DEFINED + +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/ports/SkFontConfigInterface.h" +#include "src/core/SkFontDescriptor.h" +#include "src/ports/SkFontHost_FreeType_common.h" + +class SkFontDescriptor; + +class SkTypeface_FCI : public SkTypeface_FreeType { + sk_sp fFCI; + SkFontConfigInterface::FontIdentity fIdentity; + SkString fFamilyName; + +public: + static SkTypeface_FCI* Create(sk_sp fci, + const SkFontConfigInterface::FontIdentity& fi, + SkString familyName, + const SkFontStyle& style) + { + return new SkTypeface_FCI(std::move(fci), fi, std::move(familyName), style); + } + + const SkFontConfigInterface::FontIdentity& getIdentity() const { + return fIdentity; + } + + sk_sp onMakeClone(const SkFontArguments& args) const override { + std::unique_ptr data = this->cloneFontData(args); + if (!data) { + return nullptr; + } + return sk_sp( + new SkTypeface_FreeTypeStream(std::move(data), fFamilyName, + this->fontStyle(), this->isFixedPitch())); + } + +protected: + SkTypeface_FCI(sk_sp fci, + const SkFontConfigInterface::FontIdentity& fi, + SkString familyName, + const SkFontStyle& style) + : INHERITED(style, false) + , fFCI(std::move(fci)) + , fIdentity(fi) + , fFamilyName(std::move(familyName)) {} + + void onGetFamilyName(SkString* familyName) const override { *familyName = fFamilyName; } + void onGetFontDescriptor(SkFontDescriptor*, bool*) const override; + std::unique_ptr onOpenStream(int* ttcIndex) const override; + std::unique_ptr onMakeFontData() const override; + +private: + using INHERITED = SkTypeface_FreeType; +}; + +#endif // SkFontConfigTypeface_DEFINED diff --git a/gfx/skia/skia/src/ports/SkFontHost_FreeType.cpp b/gfx/skia/skia/src/ports/SkFontHost_FreeType.cpp new file mode 100644 index 0000000000..f46bf19e6c --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontHost_FreeType.cpp @@ -0,0 +1,2365 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBBHFactory.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkData.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkGraphics.h" +#include "include/core/SkPath.h" +#include "include/core/SkPictureRecorder.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkTSearch.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkDescriptor.h" +#include "src/core/SkFDot6.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskGamma.h" +#include "src/core/SkScalerContext.h" +#include "src/ports/SkFontHost_FreeType_common.h" +#include "src/sfnt/SkOTUtils.h" +#include "src/sfnt/SkSFNTHeader.h" +#include "src/sfnt/SkTTCFHeader.h" +#include "src/utils/SkCallableTraits.h" +#include "src/utils/SkMatrix22.h" + +#include +#include +#include + +#include +#include +#include +#include +#ifdef FT_COLOR_H // 2.10.0 +# include +#endif +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +using namespace skia_private; + +namespace { +[[maybe_unused]] static inline const constexpr bool kSkShowTextBlitCoverage = false; + +using SkUniqueFTFace = std::unique_ptr>; +using SkUniqueFTSize = std::unique_ptr>; +} + +// SK_FREETYPE_MINIMUM_RUNTIME_VERSION 0x +// Flag SK_FREETYPE_DLOPEN: also try dlopen to get newer features. +#define SK_FREETYPE_DLOPEN (0x1) +#ifndef SK_FREETYPE_MINIMUM_RUNTIME_VERSION +# if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) || defined (SK_BUILD_FOR_GOOGLE3) +# define SK_FREETYPE_MINIMUM_RUNTIME_VERSION (((FREETYPE_MAJOR) << 24) | ((FREETYPE_MINOR) << 16) | ((FREETYPE_PATCH) << 8)) +# else +# define SK_FREETYPE_MINIMUM_RUNTIME_VERSION ((2 << 24) | (8 << 16) | (1 << 8) | (SK_FREETYPE_DLOPEN)) +# endif +#endif +#if SK_FREETYPE_MINIMUM_RUNTIME_VERSION & SK_FREETYPE_DLOPEN +# include +#endif + +#ifdef TT_SUPPORT_COLRV1 +// FT_ClipBox and FT_Get_Color_Glyph_ClipBox introduced VER-2-11-0-18-g47cf8ebf4 +// FT_COLR_COMPOSITE_PLUS and renumbering introduced VER-2-11-0-21-ge40ae7569 +// FT_SIZEOF_LONG_LONG introduced VER-2-11-0-31-gffdac8d67 +// FT_PaintRadialGradient changed size and layout at VER-2-11-0-147-gd3d3ff76d +// FT_STATIC_CAST introduced VER-2-11-0-172-g9079c5d91 +// So undefine TT_SUPPORT_COLRV1 before 2.11.1 but not if FT_STATIC_CAST is defined. +#if (((FREETYPE_MAJOR) < 2) || \ + ((FREETYPE_MAJOR) == 2 && (FREETYPE_MINOR) < 11) || \ + ((FREETYPE_MAJOR) == 2 && (FREETYPE_MINOR) == 11 && (FREETYPE_PATCH) < 1)) && \ + !defined(FT_STATIC_CAST) +# undef TT_SUPPORT_COLRV1 +#endif +#endif + +//#define ENABLE_GLYPH_SPEW // for tracing calls +//#define DUMP_STRIKE_CREATION +//#define SK_FONTHOST_FREETYPE_RUNTIME_VERSION +//#define SK_GAMMA_APPLY_TO_A8 + +#if 1 + #define LOG_INFO(...) +#else + #define LOG_INFO SkDEBUGF +#endif + +static bool isLCD(const SkScalerContextRec& rec) { + return SkMask::kLCD16_Format == rec.fMaskFormat; +} + +static SkScalar SkFT_FixedToScalar(FT_Fixed x) { + return SkFixedToScalar(x); +} + +////////////////////////////////////////////////////////////////////////// + +using FT_Alloc_size_t = SkCallableTraits::argument<1>::type; +static_assert(std::is_same::value || + std::is_same::value,""); + +extern "C" { + static void* sk_ft_alloc(FT_Memory, FT_Alloc_size_t size) { + return sk_malloc_canfail(size); + } + static void sk_ft_free(FT_Memory, void* block) { + sk_free(block); + } + static void* sk_ft_realloc(FT_Memory, FT_Alloc_size_t cur_size, + FT_Alloc_size_t new_size, void* block) { + return sk_realloc_throw(block, new_size); + } +} +FT_MemoryRec_ gFTMemory = { nullptr, sk_ft_alloc, sk_ft_free, sk_ft_realloc }; + +class FreeTypeLibrary : SkNoncopyable { +public: + FreeTypeLibrary() : fLibrary(nullptr) { + if (FT_New_Library(&gFTMemory, &fLibrary)) { + return; + } + FT_Add_Default_Modules(fLibrary); + FT_Set_Default_Properties(fLibrary); + + // Subpixel anti-aliasing may be unfiltered until the LCD filter is set. + // Newer versions may still need this, so this test with side effects must come first. + // The default has changed over time, so this doesn't mean the same thing to all users. + FT_Library_SetLcdFilter(fLibrary, FT_LCD_FILTER_DEFAULT); + } + ~FreeTypeLibrary() { + if (fLibrary) { + FT_Done_Library(fLibrary); + } + } + + FT_Library library() { return fLibrary; } + +private: + FT_Library fLibrary; + + // FT_Library_SetLcdFilterWeights 2.4.0 + // FT_LOAD_COLOR 2.5.0 + // FT_Pixel_Mode::FT_PIXEL_MODE_BGRA 2.5.0 + // Thread safety in 2.6.0 + // freetype/ftfntfmt.h (rename) 2.6.0 + // Direct header inclusion 2.6.1 + // FT_Get_Var_Design_Coordinates 2.7.1 + // FT_LOAD_BITMAP_METRICS_ONLY 2.7.1 + // FT_Set_Default_Properties 2.7.2 + // The 'light' hinting is vertical only from 2.8.0 + // FT_Get_Var_Axis_Flags 2.8.1 + // FT_VAR_AXIS_FLAG_HIDDEN was introduced in FreeType 2.8.1 + // -------------------- + // FT_Done_MM_Var 2.9.0 (Currenty setting ft_free to a known allocator.) + // freetype/ftcolor.h 2.10.0 (Currently assuming if compiled with FT_COLOR_H runtime available.) + + // Ubuntu 18.04 2.8.1 + // Debian 10 2.9.1 + // openSUSE Leap 15.2 2.10.1 + // Fedora 32 2.10.4 + // RHEL 8 2.9.1 +}; + +static SkMutex& f_t_mutex() { + static SkMutex& mutex = *(new SkMutex); + return mutex; +} + +static FreeTypeLibrary* gFTLibrary; + +/////////////////////////////////////////////////////////////////////////// + +class SkTypeface_FreeType::FaceRec { +public: + SkUniqueFTFace fFace; + FT_StreamRec fFTStream; + std::unique_ptr fSkStream; + FT_UShort fFTPaletteEntryCount = 0; + std::unique_ptr fSkPalette; + + static std::unique_ptr Make(const SkTypeface_FreeType* typeface); + ~FaceRec(); + +private: + FaceRec(std::unique_ptr stream); + void setupAxes(const SkFontData& data); + void setupPalette(const SkFontData& data); + + // Private to ref_ft_library and unref_ft_library + static int gFTCount; + + // Caller must lock f_t_mutex() before calling this function. + static bool ref_ft_library() { + f_t_mutex().assertHeld(); + SkASSERT(gFTCount >= 0); + + if (0 == gFTCount) { + SkASSERT(nullptr == gFTLibrary); + gFTLibrary = new FreeTypeLibrary; + } + ++gFTCount; + return gFTLibrary->library(); + } + + // Caller must lock f_t_mutex() before calling this function. + static void unref_ft_library() { + f_t_mutex().assertHeld(); + SkASSERT(gFTCount > 0); + + --gFTCount; + if (0 == gFTCount) { + SkASSERT(nullptr != gFTLibrary); + delete gFTLibrary; + SkDEBUGCODE(gFTLibrary = nullptr;) + } + } +}; +int SkTypeface_FreeType::FaceRec::gFTCount; + +extern "C" { + static unsigned long sk_ft_stream_io(FT_Stream ftStream, + unsigned long offset, + unsigned char* buffer, + unsigned long count) + { + SkStreamAsset* stream = static_cast(ftStream->descriptor.pointer); + + if (count) { + if (!stream->seek(offset)) { + return 0; + } + count = stream->read(buffer, count); + } + return count; + } + + static void sk_ft_stream_close(FT_Stream) {} +} + +SkTypeface_FreeType::FaceRec::FaceRec(std::unique_ptr stream) + : fSkStream(std::move(stream)) +{ + sk_bzero(&fFTStream, sizeof(fFTStream)); + fFTStream.size = fSkStream->getLength(); + fFTStream.descriptor.pointer = fSkStream.get(); + fFTStream.read = sk_ft_stream_io; + fFTStream.close = sk_ft_stream_close; + + f_t_mutex().assertHeld(); + ref_ft_library(); +} + +SkTypeface_FreeType::FaceRec::~FaceRec() { + f_t_mutex().assertHeld(); + fFace.reset(); // Must release face before the library, the library frees existing faces. + unref_ft_library(); +} + +void SkTypeface_FreeType::FaceRec::setupAxes(const SkFontData& data) { + if (!(fFace->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) { + return; + } + + // If a named variation is requested, don't overwrite the named variation's position. + if (data.getIndex() > 0xFFFF) { + return; + } + + SkDEBUGCODE( + FT_MM_Var* variations = nullptr; + if (FT_Get_MM_Var(fFace.get(), &variations)) { + LOG_INFO("INFO: font %s claims variations, but none found.\n", + rec->fFace->family_name); + return; + } + UniqueVoidPtr autoFreeVariations(variations); + + if (static_cast(data.getAxisCount()) != variations->num_axis) { + LOG_INFO("INFO: font %s has %d variations, but %d were specified.\n", + rec->fFace->family_name, variations->num_axis, data.getAxisCount()); + return; + } + ) + + AutoSTMalloc<4, FT_Fixed> coords(data.getAxisCount()); + for (int i = 0; i < data.getAxisCount(); ++i) { + coords[i] = data.getAxis()[i]; + } + if (FT_Set_Var_Design_Coordinates(fFace.get(), data.getAxisCount(), coords.get())) { + LOG_INFO("INFO: font %s has variations, but specified variations could not be set.\n", + rec->fFace->family_name); + return; + } +} + +void SkTypeface_FreeType::FaceRec::setupPalette(const SkFontData& data) { +#ifdef FT_COLOR_H + FT_Palette_Data paletteData; + if (FT_Palette_Data_Get(fFace.get(), &paletteData)) { + return; + } + + // Treat out of range values as 0. Still apply overrides. + // https://www.w3.org/TR/css-fonts-4/#base-palette-desc + FT_UShort basePaletteIndex = 0; + if (SkTFitsIn(data.getPaletteIndex()) && + SkTo(data.getPaletteIndex()) < paletteData.num_palettes) + { + basePaletteIndex = data.getPaletteIndex(); + } + + FT_Color* ftPalette = nullptr; + if (FT_Palette_Select(fFace.get(), basePaletteIndex, &ftPalette)) { + return; + } + fFTPaletteEntryCount = paletteData.num_palette_entries; + + for (int i = 0; i < data.getPaletteOverrideCount(); ++i) { + const SkFontArguments::Palette::Override& paletteOverride = data.getPaletteOverrides()[i]; + if (0 <= paletteOverride.index && paletteOverride.index < fFTPaletteEntryCount) { + const SkColor& skColor = paletteOverride.color; + FT_Color& ftColor = ftPalette[paletteOverride.index]; + ftColor.blue = SkColorGetB(skColor); + ftColor.green = SkColorGetG(skColor); + ftColor.red = SkColorGetR(skColor); + ftColor.alpha = SkColorGetA(skColor); + } + } + + fSkPalette.reset(new SkColor[fFTPaletteEntryCount]); + for (int i = 0; i < fFTPaletteEntryCount; ++i) { + fSkPalette[i] = SkColorSetARGB(ftPalette[i].alpha, + ftPalette[i].red, + ftPalette[i].green, + ftPalette[i].blue); + } +#endif +} + +// Will return nullptr on failure +// Caller must lock f_t_mutex() before calling this function. +std::unique_ptr +SkTypeface_FreeType::FaceRec::Make(const SkTypeface_FreeType* typeface) { + f_t_mutex().assertHeld(); + + std::unique_ptr data = typeface->makeFontData(); + if (nullptr == data || !data->hasStream()) { + return nullptr; + } + + std::unique_ptr rec(new FaceRec(data->detachStream())); + + FT_Open_Args args; + memset(&args, 0, sizeof(args)); + const void* memoryBase = rec->fSkStream->getMemoryBase(); + if (memoryBase) { + args.flags = FT_OPEN_MEMORY; + args.memory_base = (const FT_Byte*)memoryBase; + args.memory_size = rec->fSkStream->getLength(); + } else { + args.flags = FT_OPEN_STREAM; + args.stream = &rec->fFTStream; + } + + { + FT_Face rawFace; + FT_Error err = FT_Open_Face(gFTLibrary->library(), &args, data->getIndex(), &rawFace); + if (err) { + SK_TRACEFTR(err, "unable to open font '%x'", typeface->uniqueID()); + return nullptr; + } + rec->fFace.reset(rawFace); + } + SkASSERT(rec->fFace); + + rec->setupAxes(*data); + rec->setupPalette(*data); + + // FreeType will set the charmap to the "most unicode" cmap if it exists. + // If there are no unicode cmaps, the charmap is set to nullptr. + // However, "symbol" cmaps should also be considered "fallback unicode" cmaps + // because they are effectively private use area only (even if they aren't). + // This is the last on the fallback list at + // https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6cmap.html + if (!rec->fFace->charmap) { + FT_Select_Charmap(rec->fFace.get(), FT_ENCODING_MS_SYMBOL); + } + + return rec; +} + +class AutoFTAccess { +public: + AutoFTAccess(const SkTypeface_FreeType* tf) : fFaceRec(nullptr) { + f_t_mutex().acquire(); + fFaceRec = tf->getFaceRec(); + } + + ~AutoFTAccess() { + f_t_mutex().release(); + } + + FT_Face face() { return fFaceRec ? fFaceRec->fFace.get() : nullptr; } + +private: + SkTypeface_FreeType::FaceRec* fFaceRec; +}; + +/////////////////////////////////////////////////////////////////////////// + +class SkScalerContext_FreeType : public SkScalerContext_FreeType_Base { +public: + SkScalerContext_FreeType(sk_sp, + const SkScalerContextEffects&, + const SkDescriptor* desc); + ~SkScalerContext_FreeType() override; + + bool success() const { + return fFTSize != nullptr && fFace != nullptr; + } + +protected: + bool generateAdvance(SkGlyph* glyph) override; + void generateMetrics(SkGlyph* glyph, SkArenaAlloc*) override; + void generateImage(const SkGlyph& glyph) override; + bool generatePath(const SkGlyph& glyph, SkPath* path) override; + sk_sp generateDrawable(const SkGlyph&) override; + void generateFontMetrics(SkFontMetrics*) override; + +private: + SkTypeface_FreeType::FaceRec* fFaceRec; // Borrowed face from the typeface's FaceRec. + FT_Face fFace; // Borrowed face from fFaceRec. + FT_Size fFTSize; // The size to apply to the fFace. + FT_Int fStrikeIndex; // The bitmap strike for the fFace (or -1 if none). + + /** The rest of the matrix after FreeType handles the size. + * With outline font rasterization this is handled by FreeType with FT_Set_Transform. + * With bitmap only fonts this matrix must be applied to scale the bitmap. + */ + SkMatrix fMatrix22Scalar; + /** Same as fMatrix22Scalar, but in FreeType units and space. */ + FT_Matrix fMatrix22; + /** The actual size requested. */ + SkVector fScale; + + uint32_t fLoadGlyphFlags; + bool fDoLinearMetrics; + bool fLCDIsVert; + + FT_Error setupSize(); + static bool getBoundsOfCurrentOutlineGlyph(FT_GlyphSlot glyph, SkRect* bounds); + static void setGlyphBounds(SkGlyph* glyph, SkRect* bounds, bool subpixel); + bool getCBoxForLetter(char letter, FT_BBox* bbox); + // Caller must lock f_t_mutex() before calling this function. + void updateGlyphBoundsIfLCD(SkGlyph* glyph); + // Caller must lock f_t_mutex() before calling this function. + // update FreeType2 glyph slot with glyph emboldened + void emboldenIfNeeded(FT_Face face, FT_GlyphSlot glyph, SkGlyphID gid); + bool shouldSubpixelBitmap(const SkGlyph&, const SkMatrix&); +}; + +/////////////////////////////////////////////////////////////////////////// + +static bool canEmbed(FT_Face face) { + FT_UShort fsType = FT_Get_FSType_Flags(face); + return (fsType & (FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING | + FT_FSTYPE_BITMAP_EMBEDDING_ONLY)) == 0; +} + +static bool canSubset(FT_Face face) { + FT_UShort fsType = FT_Get_FSType_Flags(face); + return (fsType & FT_FSTYPE_NO_SUBSETTING) == 0; +} + +static SkAdvancedTypefaceMetrics::FontType get_font_type(FT_Face face) { + const char* fontType = FT_Get_X11_Font_Format(face); + static struct { const char* s; SkAdvancedTypefaceMetrics::FontType t; } values[] = { + { "Type 1", SkAdvancedTypefaceMetrics::kType1_Font }, + { "CID Type 1", SkAdvancedTypefaceMetrics::kType1CID_Font }, + { "CFF", SkAdvancedTypefaceMetrics::kCFF_Font }, + { "TrueType", SkAdvancedTypefaceMetrics::kTrueType_Font }, + }; + for(const auto& v : values) { if (strcmp(fontType, v.s) == 0) { return v.t; } } + return SkAdvancedTypefaceMetrics::kOther_Font; +} + +static bool is_opentype_font_data_standard_format(const SkTypeface& typeface) { + // FreeType reports TrueType for any data that can be decoded to TrueType or OpenType. + // However, there are alternate data formats for OpenType, like wOFF and wOF2. + std::unique_ptr stream = typeface.openStream(nullptr); + if (!stream) { + return false; + } + char buffer[4]; + if (stream->read(buffer, 4) < 4) { + return false; + } + + SkFourByteTag tag = SkSetFourByteTag(buffer[0], buffer[1], buffer[2], buffer[3]); + SK_OT_ULONG otTag = SkEndian_SwapBE32(tag); + return otTag == SkSFNTHeader::fontType_WindowsTrueType::TAG || + otTag == SkSFNTHeader::fontType_MacTrueType::TAG || + otTag == SkSFNTHeader::fontType_PostScript::TAG || + otTag == SkSFNTHeader::fontType_OpenTypeCFF::TAG || + otTag == SkTTCFHeader::TAG; +} + +std::unique_ptr SkTypeface_FreeType::onGetAdvancedMetrics() const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return nullptr; + } + + std::unique_ptr info(new SkAdvancedTypefaceMetrics); + info->fPostScriptName.set(FT_Get_Postscript_Name(face)); + info->fFontName = info->fPostScriptName; + + if (FT_HAS_MULTIPLE_MASTERS(face)) { + info->fFlags |= SkAdvancedTypefaceMetrics::kVariable_FontFlag; + } + if (!canEmbed(face)) { + info->fFlags |= SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag; + } + if (!canSubset(face)) { + info->fFlags |= SkAdvancedTypefaceMetrics::kNotSubsettable_FontFlag; + } + + info->fType = get_font_type(face); + if (info->fType == SkAdvancedTypefaceMetrics::kTrueType_Font && + !is_opentype_font_data_standard_format(*this)) + { + info->fFlags |= SkAdvancedTypefaceMetrics::kAltDataFormat_FontFlag; + } + + info->fStyle = (SkAdvancedTypefaceMetrics::StyleFlags)0; + if (FT_IS_FIXED_WIDTH(face)) { + info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; + } + if (face->style_flags & FT_STYLE_FLAG_ITALIC) { + info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; + } + + PS_FontInfoRec psFontInfo; + TT_Postscript* postTable; + if (FT_Get_PS_Font_Info(face, &psFontInfo) == 0) { + info->fItalicAngle = psFontInfo.italic_angle; + } else if ((postTable = (TT_Postscript*)FT_Get_Sfnt_Table(face, ft_sfnt_post)) != nullptr) { + info->fItalicAngle = SkFixedFloorToInt(postTable->italicAngle); + } else { + info->fItalicAngle = 0; + } + + info->fAscent = face->ascender; + info->fDescent = face->descender; + + TT_PCLT* pcltTable; + TT_OS2* os2Table; + if ((pcltTable = (TT_PCLT*)FT_Get_Sfnt_Table(face, ft_sfnt_pclt)) != nullptr) { + info->fCapHeight = pcltTable->CapHeight; + uint8_t serif_style = pcltTable->SerifStyle & 0x3F; + if (2 <= serif_style && serif_style <= 6) { + info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; + } else if (9 <= serif_style && serif_style <= 12) { + info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; + } + } else if (((os2Table = (TT_OS2*)FT_Get_Sfnt_Table(face, ft_sfnt_os2)) != nullptr) && + // sCapHeight is available only when version 2 or later. + os2Table->version != 0xFFFF && + os2Table->version >= 2) + { + info->fCapHeight = os2Table->sCapHeight; + } + info->fBBox = SkIRect::MakeLTRB(face->bbox.xMin, face->bbox.yMax, + face->bbox.xMax, face->bbox.yMin); + return info; +} + +void SkTypeface_FreeType::getGlyphToUnicodeMap(SkUnichar* dstArray) const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return; + } + + FT_Long numGlyphs = face->num_glyphs; + if (!dstArray) { SkASSERT(numGlyphs == 0); } + sk_bzero(dstArray, sizeof(SkUnichar) * numGlyphs); + + FT_UInt glyphIndex; + SkUnichar charCode = FT_Get_First_Char(face, &glyphIndex); + while (glyphIndex) { + SkASSERT(glyphIndex < SkToUInt(numGlyphs)); + // Use the first character that maps to this glyphID. https://crbug.com/359065 + if (0 == dstArray[glyphIndex]) { + dstArray[glyphIndex] = charCode; + } + charCode = FT_Get_Next_Char(face, charCode, &glyphIndex); + } +} + +void SkTypeface_FreeType::getPostScriptGlyphNames(SkString* dstArray) const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return; + } + + FT_Long numGlyphs = face->num_glyphs; + if (!dstArray) { SkASSERT(numGlyphs == 0); } + + if (FT_HAS_GLYPH_NAMES(face)) { + for (int gID = 0; gID < numGlyphs; ++gID) { + char glyphName[128]; // PS limit for names is 127 bytes. + FT_Get_Glyph_Name(face, gID, glyphName, 128); + dstArray[gID] = glyphName; + } + } +} + +bool SkTypeface_FreeType::onGetPostScriptName(SkString* skPostScriptName) const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return false; + } + + const char* ftPostScriptName = FT_Get_Postscript_Name(face); + if (!ftPostScriptName) { + return false; + } + if (skPostScriptName) { + *skPostScriptName = ftPostScriptName; + } + return true; +} + +/////////////////////////////////////////////////////////////////////////// + +static bool bothZero(SkScalar a, SkScalar b) { + return 0 == a && 0 == b; +} + +// returns false if there is any non-90-rotation or skew +static bool isAxisAligned(const SkScalerContextRec& rec) { + return 0 == rec.fPreSkewX && + (bothZero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || + bothZero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); +} + +std::unique_ptr SkTypeface_FreeType::onCreateScalerContext( + const SkScalerContextEffects& effects, const SkDescriptor* desc) const +{ + auto c = std::make_unique( + sk_ref_sp(const_cast(this)), effects, desc); + if (c->success()) { + return std::move(c); + } + return SkScalerContext::MakeEmpty( + sk_ref_sp(const_cast(this)), effects, desc); +} + +/** Copy the design variation coordinates into 'coordinates'. + * + * @param coordinates the buffer into which to write the design variation coordinates. + * @param coordinateCount the number of entries available through 'coordinates'. + * + * @return The number of axes, or -1 if there is an error. + * If 'coordinates != nullptr' and 'coordinateCount >= numAxes' then 'coordinates' will be + * filled with the variation coordinates describing the position of this typeface in design + * variation space. It is possible the number of axes can be retrieved but actual position + * cannot. + */ +static int GetVariationDesignPosition(AutoFTAccess& fta, + SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) +{ + FT_Face face = fta.face(); + if (!face) { + return -1; + } + + if (!(face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) { + return 0; + } + + FT_MM_Var* variations = nullptr; + if (FT_Get_MM_Var(face, &variations)) { + return -1; + } + UniqueVoidPtr autoFreeVariations(variations); + + if (!coordinates || coordinateCount < SkToInt(variations->num_axis)) { + return variations->num_axis; + } + + AutoSTMalloc<4, FT_Fixed> coords(variations->num_axis); + if (FT_Get_Var_Design_Coordinates(face, variations->num_axis, coords.get())) { + return -1; + } + for (FT_UInt i = 0; i < variations->num_axis; ++i) { + coordinates[i].axis = variations->axis[i].tag; + coordinates[i].value = SkFixedToScalar(coords[i]); + } + + return variations->num_axis; +} + +std::unique_ptr SkTypeface_FreeType::cloneFontData(const SkFontArguments& args) const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return nullptr; + } + + Scanner::AxisDefinitions axisDefinitions; + if (!Scanner::GetAxes(face, &axisDefinitions)) { + return nullptr; + } + int axisCount = axisDefinitions.size(); + + AutoSTMalloc<4, SkFontArguments::VariationPosition::Coordinate> currentPosition(axisCount); + int currentAxisCount = GetVariationDesignPosition(fta, currentPosition, axisCount); + + SkString name; + AutoSTMalloc<4, SkFixed> axisValues(axisCount); + Scanner::computeAxisValues(axisDefinitions, args.getVariationDesignPosition(), axisValues, name, + currentAxisCount == axisCount ? currentPosition.get() : nullptr); + + int ttcIndex; + std::unique_ptr stream = this->openStream(&ttcIndex); + + return std::make_unique(std::move(stream), + ttcIndex, + args.getPalette().index, + axisValues.get(), + axisCount, + args.getPalette().overrides, + args.getPalette().overrideCount); +} + +void SkTypeface_FreeType::onFilterRec(SkScalerContextRec* rec) const { + //BOGUS: http://code.google.com/p/chromium/issues/detail?id=121119 + //Cap the requested size as larger sizes give bogus values. + //Remove when http://code.google.com/p/skia/issues/detail?id=554 is fixed. + //Note that this also currently only protects against large text size requests, + //the total matrix is not taken into account here. + if (rec->fTextSize > SkIntToScalar(1 << 14)) { + rec->fTextSize = SkIntToScalar(1 << 14); + } + + SkFontHinting h = rec->getHinting(); + if (SkFontHinting::kFull == h && !isLCD(*rec)) { + // collapse full->normal hinting if we're not doing LCD + h = SkFontHinting::kNormal; + } + + // rotated text looks bad with hinting, so we disable it as needed + if (!isAxisAligned(*rec)) { + h = SkFontHinting::kNone; + } + rec->setHinting(h); + +#ifndef SK_GAMMA_APPLY_TO_A8 + if (!isLCD(*rec)) { + // SRGBTODO: Is this correct? Do we want contrast boost? + rec->ignorePreBlend(); + } +#endif +} + +int SkTypeface_FreeType::GetUnitsPerEm(FT_Face face) { + SkASSERT(face); + + SkScalar upem = SkIntToScalar(face->units_per_EM); + // At least some versions of FreeType set face->units_per_EM to 0 for bitmap only fonts. + if (upem == 0) { + TT_Header* ttHeader = (TT_Header*)FT_Get_Sfnt_Table(face, ft_sfnt_head); + if (ttHeader) { + upem = SkIntToScalar(ttHeader->Units_Per_EM); + } + } + return upem; +} + +int SkTypeface_FreeType::onGetUPEM() const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return 0; + } + return GetUnitsPerEm(face); +} + +bool SkTypeface_FreeType::onGetKerningPairAdjustments(const uint16_t glyphs[], + int count, int32_t adjustments[]) const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face || !FT_HAS_KERNING(face)) { + return false; + } + + for (int i = 0; i < count - 1; ++i) { + FT_Vector delta; + FT_Error err = FT_Get_Kerning(face, glyphs[i], glyphs[i+1], + FT_KERNING_UNSCALED, &delta); + if (err) { + return false; + } + adjustments[i] = delta.x; + } + return true; +} + +/** Returns the bitmap strike equal to or just larger than the requested size. */ +static FT_Int chooseBitmapStrike(FT_Face face, FT_F26Dot6 scaleY) { + if (face == nullptr) { + LOG_INFO("chooseBitmapStrike aborted due to nullptr face.\n"); + return -1; + } + + FT_Pos requestedPPEM = scaleY; // FT_Bitmap_Size::y_ppem is in 26.6 format. + FT_Int chosenStrikeIndex = -1; + FT_Pos chosenPPEM = 0; + for (FT_Int strikeIndex = 0; strikeIndex < face->num_fixed_sizes; ++strikeIndex) { + FT_Pos strikePPEM = face->available_sizes[strikeIndex].y_ppem; + if (strikePPEM == requestedPPEM) { + // exact match - our search stops here + return strikeIndex; + } else if (chosenPPEM < requestedPPEM) { + // attempt to increase chosenPPEM + if (chosenPPEM < strikePPEM) { + chosenPPEM = strikePPEM; + chosenStrikeIndex = strikeIndex; + } + } else { + // attempt to decrease chosenPPEM, but not below requestedPPEM + if (requestedPPEM < strikePPEM && strikePPEM < chosenPPEM) { + chosenPPEM = strikePPEM; + chosenStrikeIndex = strikeIndex; + } + } + } + return chosenStrikeIndex; +} + +SkScalerContext_FreeType::SkScalerContext_FreeType(sk_sp typeface, + const SkScalerContextEffects& effects, + const SkDescriptor* desc) + : SkScalerContext_FreeType_Base(std::move(typeface), effects, desc) + , fFace(nullptr) + , fFTSize(nullptr) + , fStrikeIndex(-1) +{ + SkAutoMutexExclusive ac(f_t_mutex()); + fFaceRec = static_cast(this->getTypeface())->getFaceRec(); + + // load the font file + if (nullptr == fFaceRec) { + LOG_INFO("Could not create FT_Face.\n"); + return; + } + + fLCDIsVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); + + // compute the flags we send to Load_Glyph + bool linearMetrics = this->isLinearMetrics(); + { + FT_Int32 loadFlags = FT_LOAD_DEFAULT; + + if (SkMask::kBW_Format == fRec.fMaskFormat) { + // See http://code.google.com/p/chromium/issues/detail?id=43252#c24 + loadFlags = FT_LOAD_TARGET_MONO; + if (fRec.getHinting() == SkFontHinting::kNone) { + loadFlags |= FT_LOAD_NO_HINTING; + linearMetrics = true; + } + } else { + switch (fRec.getHinting()) { + case SkFontHinting::kNone: + loadFlags = FT_LOAD_NO_HINTING; + linearMetrics = true; + break; + case SkFontHinting::kSlight: + loadFlags = FT_LOAD_TARGET_LIGHT; // This implies FORCE_AUTOHINT + linearMetrics = true; + break; + case SkFontHinting::kNormal: + loadFlags = FT_LOAD_TARGET_NORMAL; + break; + case SkFontHinting::kFull: + loadFlags = FT_LOAD_TARGET_NORMAL; + if (isLCD(fRec)) { + if (fLCDIsVert) { + loadFlags = FT_LOAD_TARGET_LCD_V; + } else { + loadFlags = FT_LOAD_TARGET_LCD; + } + } + break; + default: + LOG_INFO("---------- UNKNOWN hinting %d\n", fRec.getHinting()); + break; + } + } + + if (fRec.fFlags & SkScalerContext::kForceAutohinting_Flag) { + loadFlags |= FT_LOAD_FORCE_AUTOHINT; +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + } else { + loadFlags |= FT_LOAD_NO_AUTOHINT; +#endif + } + + if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0) { + loadFlags |= FT_LOAD_NO_BITMAP; + } + + // Always using FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH to get correct + // advances, as fontconfig and cairo do. + // See http://code.google.com/p/skia/issues/detail?id=222. + loadFlags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; + + // Use vertical layout if requested. + if (this->isVertical()) { + loadFlags |= FT_LOAD_VERTICAL_LAYOUT; + } + + fLoadGlyphFlags = loadFlags; + } + + SkUniqueFTSize ftSize([this]() -> FT_Size { + FT_Size size; + FT_Error err = FT_New_Size(fFaceRec->fFace.get(), &size); + if (err != 0) { + SK_TRACEFTR(err, "FT_New_Size(%s) failed.", fFaceRec->fFace->family_name); + return nullptr; + } + return size; + }()); + if (nullptr == ftSize) { + LOG_INFO("Could not create FT_Size.\n"); + return; + } + + FT_Error err = FT_Activate_Size(ftSize.get()); + if (err != 0) { + SK_TRACEFTR(err, "FT_Activate_Size(%s) failed.", fFaceRec->fFace->family_name); + return; + } + + fRec.computeMatrices(SkScalerContextRec::PreMatrixScale::kFull, &fScale, &fMatrix22Scalar); + FT_F26Dot6 scaleX = SkScalarToFDot6(fScale.fX); + FT_F26Dot6 scaleY = SkScalarToFDot6(fScale.fY); + + if (FT_IS_SCALABLE(fFaceRec->fFace)) { + err = FT_Set_Char_Size(fFaceRec->fFace.get(), scaleX, scaleY, 72, 72); + if (err != 0) { + SK_TRACEFTR(err, "FT_Set_CharSize(%s, %f, %f) failed.", + fFaceRec->fFace->family_name, fScale.fX, fScale.fY); + return; + } + + // Adjust the matrix to reflect the actually chosen scale. + // FreeType currently does not allow requesting sizes less than 1, this allow for scaling. + // Don't do this at all sizes as that will interfere with hinting. + if (fScale.fX < 1 || fScale.fY < 1) { + SkScalar upem = fFaceRec->fFace->units_per_EM; + FT_Size_Metrics& ftmetrics = fFaceRec->fFace->size->metrics; + SkScalar x_ppem = upem * SkFT_FixedToScalar(ftmetrics.x_scale) / 64.0f; + SkScalar y_ppem = upem * SkFT_FixedToScalar(ftmetrics.y_scale) / 64.0f; + fMatrix22Scalar.preScale(fScale.x() / x_ppem, fScale.y() / y_ppem); + } + + // FT_LOAD_COLOR with scalable fonts means allow SVG. + // It also implies attempt to render COLR if available, but this is not used. +#if defined(FT_CONFIG_OPTION_SVG) + if (SkGraphics::GetOpenTypeSVGDecoderFactory()) { + fLoadGlyphFlags |= FT_LOAD_COLOR; + } +#endif + } else if (FT_HAS_FIXED_SIZES(fFaceRec->fFace)) { + fStrikeIndex = chooseBitmapStrike(fFaceRec->fFace.get(), scaleY); + if (fStrikeIndex == -1) { + LOG_INFO("No glyphs for font \"%s\" size %f.\n", + fFaceRec->fFace->family_name, fScale.fY); + return; + } + + err = FT_Select_Size(fFaceRec->fFace.get(), fStrikeIndex); + if (err != 0) { + SK_TRACEFTR(err, "FT_Select_Size(%s, %d) failed.", + fFaceRec->fFace->family_name, fStrikeIndex); + fStrikeIndex = -1; + return; + } + + // Adjust the matrix to reflect the actually chosen scale. + // It is likely that the ppem chosen was not the one requested, this allows for scaling. + fMatrix22Scalar.preScale(fScale.x() / fFaceRec->fFace->size->metrics.x_ppem, + fScale.y() / fFaceRec->fFace->size->metrics.y_ppem); + + // FreeType does not provide linear metrics for bitmap fonts. + linearMetrics = false; + + // FreeType documentation says: + // FT_LOAD_NO_BITMAP -- Ignore bitmap strikes when loading. + // Bitmap-only fonts ignore this flag. + // + // However, in FreeType 2.5.1 color bitmap only fonts do not ignore this flag. + // Force this flag off for bitmap only fonts. + fLoadGlyphFlags &= ~FT_LOAD_NO_BITMAP; + + // Color bitmaps are supported. + fLoadGlyphFlags |= FT_LOAD_COLOR; + } else { + LOG_INFO("Unknown kind of font \"%s\" size %f.\n", fFaceRec->fFace->family_name, fScale.fY); + return; + } + + fMatrix22.xx = SkScalarToFixed(fMatrix22Scalar.getScaleX()); + fMatrix22.xy = SkScalarToFixed(-fMatrix22Scalar.getSkewX()); + fMatrix22.yx = SkScalarToFixed(-fMatrix22Scalar.getSkewY()); + fMatrix22.yy = SkScalarToFixed(fMatrix22Scalar.getScaleY()); + + fFTSize = ftSize.release(); + fFace = fFaceRec->fFace.get(); + fDoLinearMetrics = linearMetrics; +} + +SkScalerContext_FreeType::~SkScalerContext_FreeType() { + SkAutoMutexExclusive ac(f_t_mutex()); + + if (fFTSize != nullptr) { + FT_Done_Size(fFTSize); + } + + fFaceRec = nullptr; +} + +/* We call this before each use of the fFace, since we may be sharing + this face with other context (at different sizes). +*/ +FT_Error SkScalerContext_FreeType::setupSize() { + f_t_mutex().assertHeld(); + FT_Error err = FT_Activate_Size(fFTSize); + if (err != 0) { + return err; + } + FT_Set_Transform(fFace, &fMatrix22, nullptr); + return 0; +} + +bool SkScalerContext_FreeType::generateAdvance(SkGlyph* glyph) { + /* unhinted and light hinted text have linearly scaled advances + * which are very cheap to compute with some font formats... + */ + if (!fDoLinearMetrics) { + return false; + } + + SkAutoMutexExclusive ac(f_t_mutex()); + + if (this->setupSize()) { + glyph->zeroMetrics(); + return true; + } + + FT_Error error; + FT_Fixed advance; + + error = FT_Get_Advance( fFace, glyph->getGlyphID(), + fLoadGlyphFlags | FT_ADVANCE_FLAG_FAST_ONLY, + &advance ); + + if (error != 0) { + return false; + } + + const SkScalar advanceScalar = SkFT_FixedToScalar(advance); + glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getScaleX() * advanceScalar); + glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getSkewY() * advanceScalar); + return true; +} + +bool SkScalerContext_FreeType::getBoundsOfCurrentOutlineGlyph(FT_GlyphSlot glyph, SkRect* bounds) { + if (glyph->format != FT_GLYPH_FORMAT_OUTLINE) { + SkASSERT(false); + return false; + } + if (0 == glyph->outline.n_contours) { + return false; + } + + FT_BBox bbox; + FT_Outline_Get_CBox(&glyph->outline, &bbox); + *bounds = SkRect::MakeLTRB(SkFDot6ToScalar(bbox.xMin), -SkFDot6ToScalar(bbox.yMax), + SkFDot6ToScalar(bbox.xMax), -SkFDot6ToScalar(bbox.yMin)); + return true; +} + +bool SkScalerContext_FreeType::getCBoxForLetter(char letter, FT_BBox* bbox) { + const FT_UInt glyph_id = FT_Get_Char_Index(fFace, letter); + if (!glyph_id) { + return false; + } + if (FT_Load_Glyph(fFace, glyph_id, fLoadGlyphFlags)) { + return false; + } + if (fFace->glyph->format != FT_GLYPH_FORMAT_OUTLINE) { + return false; + } + emboldenIfNeeded(fFace, fFace->glyph, SkTo(glyph_id)); + FT_Outline_Get_CBox(&fFace->glyph->outline, bbox); + return true; +} + +void SkScalerContext_FreeType::setGlyphBounds(SkGlyph* glyph, SkRect* bounds, bool subpixel) { + SkIRect irect; + if (bounds->isEmpty()) { + irect = SkIRect::MakeEmpty(); + } else { + if (subpixel) { + bounds->offset(SkFixedToScalar(glyph->getSubXFixed()), + SkFixedToScalar(glyph->getSubYFixed())); + } + + irect = bounds->roundOut(); + if (!SkTFitsInfWidth )>(irect.width ()) || + !SkTFitsInfHeight)>(irect.height()) || + !SkTFitsInfTop )>(irect.top ()) || + !SkTFitsInfLeft )>(irect.left ()) ) + { + irect = SkIRect::MakeEmpty(); + } + } + glyph->fWidth = SkToU16(irect.width ()); + glyph->fHeight = SkToU16(irect.height()); + glyph->fTop = SkToS16(irect.top ()); + glyph->fLeft = SkToS16(irect.left ()); +} + +void SkScalerContext_FreeType::updateGlyphBoundsIfLCD(SkGlyph* glyph) { + if (glyph->fMaskFormat == SkMask::kLCD16_Format && + glyph->fWidth > 0 && glyph->fHeight > 0) + { + if (fLCDIsVert) { + glyph->fHeight += 2; + glyph->fTop -= 1; + } else { + glyph->fWidth += 2; + glyph->fLeft -= 1; + } + } +} + +bool SkScalerContext_FreeType::shouldSubpixelBitmap(const SkGlyph& glyph, const SkMatrix& matrix) { + // If subpixel rendering of a bitmap *can* be done. + bool mechanism = fFace->glyph->format == FT_GLYPH_FORMAT_BITMAP && + this->isSubpixel() && + (glyph.getSubXFixed() || glyph.getSubYFixed()); + + // If subpixel rendering of a bitmap *should* be done. + // 1. If the face is not scalable then always allow subpixel rendering. + // Otherwise, if the font has an 8ppem strike 7 will subpixel render but 8 won't. + // 2. If the matrix is already not identity the bitmap will already be resampled, + // so resampling slightly differently shouldn't make much difference. + bool policy = !FT_IS_SCALABLE(fFace) || !matrix.isIdentity(); + + return mechanism && policy; +} + +void SkScalerContext_FreeType::generateMetrics(SkGlyph* glyph, SkArenaAlloc* alloc) { + SkAutoMutexExclusive ac(f_t_mutex()); + + if (this->setupSize()) { + glyph->zeroMetrics(); + return; + } + + FT_Bool haveLayers = false; +#ifdef FT_COLOR_H + // See https://skbug.com/12945, if the face isn't marked scalable then paths cannot be loaded. + if (FT_IS_SCALABLE(fFace)) { + SkRect bounds = SkRect::MakeEmpty(); +#ifdef TT_SUPPORT_COLRV1 + FT_OpaquePaint opaqueLayerPaint{nullptr, 1}; + if (FT_Get_Color_Glyph_Paint(fFace, glyph->getGlyphID(), + FT_COLOR_INCLUDE_ROOT_TRANSFORM, &opaqueLayerPaint)) { + haveLayers = true; + glyph->fScalerContextBits = ScalerContextBits::COLRv1; + + // COLRv1 optionally provides a ClipBox. + FT_ClipBox clipBox; + if (FT_Get_Color_Glyph_ClipBox(fFace, glyph->getGlyphID(), &clipBox)) { + // Find bounding box of clip box corner points, needed when clipbox is transformed. + FT_BBox bbox; + bbox.xMin = clipBox.bottom_left.x; + bbox.xMax = clipBox.bottom_left.x; + bbox.yMin = clipBox.bottom_left.y; + bbox.yMax = clipBox.bottom_left.y; + for (auto& corner : {clipBox.top_left, clipBox.top_right, clipBox.bottom_right}) { + bbox.xMin = std::min(bbox.xMin, corner.x); + bbox.yMin = std::min(bbox.yMin, corner.y); + bbox.xMax = std::max(bbox.xMax, corner.x); + bbox.yMax = std::max(bbox.yMax, corner.y); + } + bounds = SkRect::MakeLTRB(SkFDot6ToScalar(bbox.xMin), -SkFDot6ToScalar(bbox.yMax), + SkFDot6ToScalar(bbox.xMax), -SkFDot6ToScalar(bbox.yMin)); + } else { + // Traverse the glyph graph with a focus on measuring the required bounding box. + // The call to computeColrV1GlyphBoundingBox may modify the face. + // Reset the face to load the base glyph for metrics. + if (!computeColrV1GlyphBoundingBox(fFace, glyph->getGlyphID(), &bounds) || + this->setupSize()) + { + glyph->zeroMetrics(); + return; + } + } + } +#endif // #TT_SUPPORT_COLRV1 + + if (!haveLayers) { + FT_LayerIterator layerIterator = { 0, 0, nullptr }; + FT_UInt layerGlyphIndex; + FT_UInt layerColorIndex; + FT_Int32 flags = fLoadGlyphFlags; + flags |= FT_LOAD_BITMAP_METRICS_ONLY; // Don't decode any bitmaps. + flags |= FT_LOAD_NO_BITMAP; // Ignore embedded bitmaps. + flags &= ~FT_LOAD_RENDER; // Don't scan convert. + flags &= ~FT_LOAD_COLOR; // Ignore SVG. + // For COLRv0 compute the glyph bounding box from the union of layer bounding boxes. + while (FT_Get_Color_Glyph_Layer(fFace, glyph->getGlyphID(), &layerGlyphIndex, + &layerColorIndex, &layerIterator)) { + haveLayers = true; + if (FT_Load_Glyph(fFace, layerGlyphIndex, flags)) { + glyph->zeroMetrics(); + return; + } + + SkRect currentBounds; + if (getBoundsOfCurrentOutlineGlyph(fFace->glyph, ¤tBounds)) { + bounds.join(currentBounds); + } + } + if (haveLayers) { + glyph->fScalerContextBits = ScalerContextBits::COLRv0; + } + } + + if (haveLayers) { + glyph->fMaskFormat = SkMask::kARGB32_Format; + glyph->setPath(alloc, nullptr, false); + setGlyphBounds(glyph, &bounds, this->isSubpixel()); + } + } +#endif //FT_COLOR_H + + // Even if haveLayers, the base glyph must be loaded to get the metrics. + if (FT_Load_Glyph(fFace, glyph->getGlyphID(), fLoadGlyphFlags | FT_LOAD_BITMAP_METRICS_ONLY)) { + glyph->zeroMetrics(); + return; + } + + if (!haveLayers) { + emboldenIfNeeded(fFace, fFace->glyph, glyph->getGlyphID()); + + if (fFace->glyph->format == FT_GLYPH_FORMAT_OUTLINE) { + SkRect bounds; + if (!getBoundsOfCurrentOutlineGlyph(fFace->glyph, &bounds)) { + bounds = SkRect::MakeEmpty(); + } + setGlyphBounds(glyph, &bounds, this->isSubpixel()); + updateGlyphBoundsIfLCD(glyph); + + } else if (fFace->glyph->format == FT_GLYPH_FORMAT_BITMAP) { + glyph->setPath(alloc, nullptr, false); + + if (this->isVertical()) { + FT_Vector vector; + vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; + vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; + FT_Vector_Transform(&vector, &fMatrix22); + fFace->glyph->bitmap_left += SkFDot6Floor(vector.x); + fFace->glyph->bitmap_top += SkFDot6Floor(vector.y); + } + + if (fFace->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_BGRA) { + glyph->fMaskFormat = SkMask::kARGB32_Format; + } + + SkRect bounds = SkRect::MakeXYWH(SkIntToScalar(fFace->glyph->bitmap_left ), + -SkIntToScalar(fFace->glyph->bitmap_top ), + SkIntToScalar(fFace->glyph->bitmap.width), + SkIntToScalar(fFace->glyph->bitmap.rows )); + fMatrix22Scalar.mapRect(&bounds); + setGlyphBounds(glyph, &bounds, this->shouldSubpixelBitmap(*glyph, fMatrix22Scalar)); + +#if defined(FT_CONFIG_OPTION_SVG) + } else if (fFace->glyph->format == FT_GLYPH_FORMAT_SVG) { + glyph->fScalerContextBits = ScalerContextBits::SVG; + glyph->fMaskFormat = SkMask::kARGB32_Format; + glyph->setPath(alloc, nullptr, false); + + SkPictureRecorder recorder; + SkRect infiniteRect = SkRect::MakeLTRB(-SK_ScalarInfinity, -SK_ScalarInfinity, + SK_ScalarInfinity, SK_ScalarInfinity); + sk_sp bboxh = SkRTreeFactory()(); + SkSpan palette(fFaceRec->fSkPalette.get(), fFaceRec->fFTPaletteEntryCount); + SkCanvas* recordingCanvas = recorder.beginRecording(infiniteRect, bboxh); + if (!this->drawSVGGlyph(fFace, *glyph, fLoadGlyphFlags, palette, recordingCanvas)) { + glyph->zeroMetrics(); + return; + } + sk_sp pic = recorder.finishRecordingAsPicture(); + SkRect bounds = pic->cullRect(); + SkASSERT(bounds.isFinite()); + + // drawSVGGlyph already applied the subpixel positioning. + setGlyphBounds(glyph, &bounds, false); +#endif // FT_CONFIG_OPTION_SVG + + } else { + SkDEBUGFAIL("unknown glyph format"); + glyph->zeroMetrics(); + return; + } + } + + if (this->isVertical()) { + if (fDoLinearMetrics) { + const SkScalar advanceScalar = SkFT_FixedToScalar(fFace->glyph->linearVertAdvance); + glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getSkewX() * advanceScalar); + glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getScaleY() * advanceScalar); + } else { + glyph->fAdvanceX = -SkFDot6ToFloat(fFace->glyph->advance.x); + glyph->fAdvanceY = SkFDot6ToFloat(fFace->glyph->advance.y); + } + } else { + if (fDoLinearMetrics) { + const SkScalar advanceScalar = SkFT_FixedToScalar(fFace->glyph->linearHoriAdvance); + glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getScaleX() * advanceScalar); + glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getSkewY() * advanceScalar); + } else { + glyph->fAdvanceX = SkFDot6ToFloat(fFace->glyph->advance.x); + glyph->fAdvanceY = -SkFDot6ToFloat(fFace->glyph->advance.y); + } + } + +#ifdef ENABLE_GLYPH_SPEW + LOG_INFO("Metrics(glyph:%d flags:0x%x) w:%d\n", glyph->getGlyphID(), fLoadGlyphFlags, glyph->fWidth); +#endif +} + +void SkScalerContext_FreeType::generateImage(const SkGlyph& glyph) { + SkAutoMutexExclusive ac(f_t_mutex()); + + if (this->setupSize()) { + sk_bzero(glyph.fImage, glyph.imageSize()); + return; + } + + if (glyph.fScalerContextBits == ScalerContextBits::COLRv0 || + glyph.fScalerContextBits == ScalerContextBits::COLRv1 || + glyph.fScalerContextBits == ScalerContextBits::SVG ) + { + SkASSERT(glyph.maskFormat() == SkMask::kARGB32_Format); + SkBitmap dstBitmap; + // TODO: mark this as sRGB when the blits will be sRGB. + dstBitmap.setInfo(SkImageInfo::Make(glyph.fWidth, glyph.fHeight, + kN32_SkColorType, + kPremul_SkAlphaType), + glyph.rowBytes()); + dstBitmap.setPixels(glyph.fImage); + + SkCanvas canvas(dstBitmap); + if constexpr (kSkShowTextBlitCoverage) { + canvas.clear(0x33FF0000); + } else { + canvas.clear(SK_ColorTRANSPARENT); + } + canvas.translate(-glyph.fLeft, -glyph.fTop); + + SkSpan palette(fFaceRec->fSkPalette.get(), fFaceRec->fFTPaletteEntryCount); + if (glyph.fScalerContextBits == ScalerContextBits::COLRv0) { +#ifdef FT_COLOR_H + this->drawCOLRv0Glyph(fFace, glyph, fLoadGlyphFlags, palette, &canvas); +#endif + } else if (glyph.fScalerContextBits == ScalerContextBits::COLRv1) { +#ifdef TT_SUPPORT_COLRV1 + this->drawCOLRv1Glyph(fFace, glyph, fLoadGlyphFlags, palette, &canvas); +#endif + } else if (glyph.fScalerContextBits == ScalerContextBits::SVG) { +#if defined(FT_CONFIG_OPTION_SVG) + if (FT_Load_Glyph(fFace, glyph.getGlyphID(), fLoadGlyphFlags)) { + return; + } + this->drawSVGGlyph(fFace, glyph, fLoadGlyphFlags, palette, &canvas); +#endif + } + return; + } + + if (FT_Load_Glyph(fFace, glyph.getGlyphID(), fLoadGlyphFlags)) { + sk_bzero(glyph.fImage, glyph.imageSize()); + return; + } + emboldenIfNeeded(fFace, fFace->glyph, glyph.getGlyphID()); + + SkMatrix* bitmapMatrix = &fMatrix22Scalar; + SkMatrix subpixelBitmapMatrix; + if (this->shouldSubpixelBitmap(glyph, *bitmapMatrix)) { + subpixelBitmapMatrix = fMatrix22Scalar; + subpixelBitmapMatrix.postTranslate(SkFixedToScalar(glyph.getSubXFixed()), + SkFixedToScalar(glyph.getSubYFixed())); + bitmapMatrix = &subpixelBitmapMatrix; + } + + generateGlyphImage(fFace, glyph, *bitmapMatrix); +} + +sk_sp SkScalerContext_FreeType::generateDrawable(const SkGlyph& glyph) { + // Because FreeType's FT_Face is stateful (not thread safe) and the current design of this + // SkTypeface and SkScalerContext does not work around this, it is necessary lock at least the + // FT_Face when using it (this implementation currently locks the whole FT_Library). + // It should be possible to draw the drawable straight out of the FT_Face. However, this would + // mean locking each time any such drawable is drawn. To avoid locking, this implementation + // creates drawables backed as pictures so that they can be played back later without locking. + SkAutoMutexExclusive ac(f_t_mutex()); + + if (this->setupSize()) { + return nullptr; + } + +#if defined(FT_COLOR_H) || defined(TT_SUPPORT_COLRV1) || defined(FT_CONFIG_OPTION_SVG) + if (glyph.fScalerContextBits == ScalerContextBits::COLRv0 || + glyph.fScalerContextBits == ScalerContextBits::COLRv1 || + glyph.fScalerContextBits == ScalerContextBits::SVG ) + { + SkSpan palette(fFaceRec->fSkPalette.get(), fFaceRec->fFTPaletteEntryCount); + SkPictureRecorder recorder; + SkCanvas* recordingCanvas = recorder.beginRecording(SkRect::Make(glyph.mask().fBounds)); + if (glyph.fScalerContextBits == ScalerContextBits::COLRv0) { +#ifdef FT_COLOR_H + if (!this->drawCOLRv0Glyph(fFace, glyph, fLoadGlyphFlags, palette, recordingCanvas)) { + return nullptr; + } +#else + return nullptr; +#endif + } else if (glyph.fScalerContextBits == ScalerContextBits::COLRv1) { +#ifdef TT_SUPPORT_COLRV1 + if (!this->drawCOLRv1Glyph(fFace, glyph, fLoadGlyphFlags, palette, recordingCanvas)) { + return nullptr; + } +#else + return nullptr; +#endif + } else if (glyph.fScalerContextBits == ScalerContextBits::SVG) { +#if defined(FT_CONFIG_OPTION_SVG) + if (FT_Load_Glyph(fFace, glyph.getGlyphID(), fLoadGlyphFlags)) { + return nullptr; + } + if (!this->drawSVGGlyph(fFace, glyph, fLoadGlyphFlags, palette, recordingCanvas)) { + return nullptr; + } +#else + return nullptr; +#endif + } + return recorder.finishRecordingAsDrawable(); + } +#endif + return nullptr; +} + +bool SkScalerContext_FreeType::generatePath(const SkGlyph& glyph, SkPath* path) { + SkASSERT(path); + + SkAutoMutexExclusive ac(f_t_mutex()); + + SkGlyphID glyphID = glyph.getGlyphID(); + // FT_IS_SCALABLE is documented to mean the face contains outline glyphs. + if (!FT_IS_SCALABLE(fFace) || this->setupSize()) { + path->reset(); + return false; + } + + uint32_t flags = fLoadGlyphFlags; + flags |= FT_LOAD_NO_BITMAP; // ignore embedded bitmaps so we're sure to get the outline + flags &= ~FT_LOAD_RENDER; // don't scan convert (we just want the outline) + + FT_Error err = FT_Load_Glyph(fFace, glyphID, flags); + if (err != 0 || fFace->glyph->format != FT_GLYPH_FORMAT_OUTLINE) { + path->reset(); + return false; + } + emboldenIfNeeded(fFace, fFace->glyph, glyphID); + + if (!generateGlyphPath(fFace, path)) { + path->reset(); + return false; + } + + // The path's origin from FreeType is always the horizontal layout origin. + // Offset the path so that it is relative to the vertical origin if needed. + if (this->isVertical()) { + FT_Vector vector; + vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; + vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; + FT_Vector_Transform(&vector, &fMatrix22); + path->offset(SkFDot6ToScalar(vector.x), -SkFDot6ToScalar(vector.y)); + } + return true; +} + +void SkScalerContext_FreeType::generateFontMetrics(SkFontMetrics* metrics) { + if (nullptr == metrics) { + return; + } + + SkAutoMutexExclusive ac(f_t_mutex()); + + if (this->setupSize()) { + sk_bzero(metrics, sizeof(*metrics)); + return; + } + + FT_Face face = fFace; + metrics->fFlags = 0; + + SkScalar upem = SkIntToScalar(SkTypeface_FreeType::GetUnitsPerEm(face)); + + // use the os/2 table as a source of reasonable defaults. + SkScalar x_height = 0.0f; + SkScalar avgCharWidth = 0.0f; + SkScalar cap_height = 0.0f; + SkScalar strikeoutThickness = 0.0f, strikeoutPosition = 0.0f; + TT_OS2* os2 = (TT_OS2*) FT_Get_Sfnt_Table(face, ft_sfnt_os2); + if (os2) { + x_height = SkIntToScalar(os2->sxHeight) / upem * fScale.y(); + avgCharWidth = SkIntToScalar(os2->xAvgCharWidth) / upem; + strikeoutThickness = SkIntToScalar(os2->yStrikeoutSize) / upem; + strikeoutPosition = -SkIntToScalar(os2->yStrikeoutPosition) / upem; + metrics->fFlags |= SkFontMetrics::kStrikeoutThicknessIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kStrikeoutPositionIsValid_Flag; + if (os2->version != 0xFFFF && os2->version >= 2) { + cap_height = SkIntToScalar(os2->sCapHeight) / upem * fScale.y(); + } + } + + // pull from format-specific metrics as needed + SkScalar ascent, descent, leading, xmin, xmax, ymin, ymax; + SkScalar underlineThickness, underlinePosition; + if (face->face_flags & FT_FACE_FLAG_SCALABLE) { // scalable outline font + // FreeType will always use HHEA metrics if they're not zero. + // It completely ignores the OS/2 fsSelection::UseTypoMetrics bit. + // It also ignores the VDMX tables, which are also of interest here + // (and override everything else when they apply). + static const int kUseTypoMetricsMask = (1 << 7); + if (os2 && os2->version != 0xFFFF && (os2->fsSelection & kUseTypoMetricsMask)) { + ascent = -SkIntToScalar(os2->sTypoAscender) / upem; + descent = -SkIntToScalar(os2->sTypoDescender) / upem; + leading = SkIntToScalar(os2->sTypoLineGap) / upem; + } else { + ascent = -SkIntToScalar(face->ascender) / upem; + descent = -SkIntToScalar(face->descender) / upem; + leading = SkIntToScalar(face->height + (face->descender - face->ascender)) / upem; + } + xmin = SkIntToScalar(face->bbox.xMin) / upem; + xmax = SkIntToScalar(face->bbox.xMax) / upem; + ymin = -SkIntToScalar(face->bbox.yMin) / upem; + ymax = -SkIntToScalar(face->bbox.yMax) / upem; + underlineThickness = SkIntToScalar(face->underline_thickness) / upem; + underlinePosition = -SkIntToScalar(face->underline_position + + face->underline_thickness / 2) / upem; + + metrics->fFlags |= SkFontMetrics::kUnderlineThicknessIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kUnderlinePositionIsValid_Flag; + + // we may be able to synthesize x_height and cap_height from outline + if (!x_height) { + FT_BBox bbox; + if (getCBoxForLetter('x', &bbox)) { + x_height = SkIntToScalar(bbox.yMax) / 64.0f; + } + } + if (!cap_height) { + FT_BBox bbox; + if (getCBoxForLetter('H', &bbox)) { + cap_height = SkIntToScalar(bbox.yMax) / 64.0f; + } + } + } else if (fStrikeIndex != -1) { // bitmap strike metrics + SkScalar xppem = SkIntToScalar(face->size->metrics.x_ppem); + SkScalar yppem = SkIntToScalar(face->size->metrics.y_ppem); + ascent = -SkIntToScalar(face->size->metrics.ascender) / (yppem * 64.0f); + descent = -SkIntToScalar(face->size->metrics.descender) / (yppem * 64.0f); + leading = (SkIntToScalar(face->size->metrics.height) / (yppem * 64.0f)) + ascent - descent; + + xmin = 0.0f; + xmax = SkIntToScalar(face->available_sizes[fStrikeIndex].width) / xppem; + ymin = descent; + ymax = ascent; + // The actual bitmaps may be any size and placed at any offset. + metrics->fFlags |= SkFontMetrics::kBoundsInvalid_Flag; + + underlineThickness = 0; + underlinePosition = 0; + metrics->fFlags &= ~SkFontMetrics::kUnderlineThicknessIsValid_Flag; + metrics->fFlags &= ~SkFontMetrics::kUnderlinePositionIsValid_Flag; + + TT_Postscript* post = (TT_Postscript*) FT_Get_Sfnt_Table(face, ft_sfnt_post); + if (post) { + underlineThickness = SkIntToScalar(post->underlineThickness) / upem; + underlinePosition = -SkIntToScalar(post->underlinePosition) / upem; + metrics->fFlags |= SkFontMetrics::kUnderlineThicknessIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kUnderlinePositionIsValid_Flag; + } + } else { + sk_bzero(metrics, sizeof(*metrics)); + return; + } + + // synthesize elements that were not provided by the os/2 table or format-specific metrics + if (!x_height) { + x_height = -ascent * fScale.y(); + } + if (!avgCharWidth) { + avgCharWidth = xmax - xmin; + } + if (!cap_height) { + cap_height = -ascent * fScale.y(); + } + + // disallow negative linespacing + if (leading < 0.0f) { + leading = 0.0f; + } + + metrics->fTop = ymax * fScale.y(); + metrics->fAscent = ascent * fScale.y(); + metrics->fDescent = descent * fScale.y(); + metrics->fBottom = ymin * fScale.y(); + metrics->fLeading = leading * fScale.y(); + metrics->fAvgCharWidth = avgCharWidth * fScale.y(); + metrics->fXMin = xmin * fScale.y(); + metrics->fXMax = xmax * fScale.y(); + metrics->fMaxCharWidth = metrics->fXMax - metrics->fXMin; + metrics->fXHeight = x_height; + metrics->fCapHeight = cap_height; + metrics->fUnderlineThickness = underlineThickness * fScale.y(); + metrics->fUnderlinePosition = underlinePosition * fScale.y(); + metrics->fStrikeoutThickness = strikeoutThickness * fScale.y(); + metrics->fStrikeoutPosition = strikeoutPosition * fScale.y(); + + if (face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS +#if defined(FT_CONFIG_OPTION_SVG) + || face->face_flags & FT_FACE_FLAG_SVG +#endif // FT_CONFIG_OPTION_SVG + ) { + // The bounds are only valid for the default variation of variable glyphs. + // https://docs.microsoft.com/en-us/typography/opentype/spec/head + // For SVG glyphs this number is often incorrect for its non-`glyf` points. + // https://github.com/fonttools/fonttools/issues/2566 + metrics->fFlags |= SkFontMetrics::kBoundsInvalid_Flag; + } +} + +/////////////////////////////////////////////////////////////////////////////// + +// hand-tuned value to reduce outline embolden strength +#ifndef SK_OUTLINE_EMBOLDEN_DIVISOR + #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + #define SK_OUTLINE_EMBOLDEN_DIVISOR 34 + #else + #define SK_OUTLINE_EMBOLDEN_DIVISOR 24 + #endif +#endif + +/////////////////////////////////////////////////////////////////////////////// + +void SkScalerContext_FreeType::emboldenIfNeeded(FT_Face face, FT_GlyphSlot glyph, SkGlyphID gid) { + // check to see if the embolden bit is set + if (0 == (fRec.fFlags & SkScalerContext::kEmbolden_Flag)) { + return; + } + + switch (glyph->format) { + case FT_GLYPH_FORMAT_OUTLINE: + FT_Pos strength; + strength = FT_MulFix(face->units_per_EM, face->size->metrics.y_scale) + / SK_OUTLINE_EMBOLDEN_DIVISOR; + FT_Outline_Embolden(&glyph->outline, strength); + break; + case FT_GLYPH_FORMAT_BITMAP: + if (!fFace->glyph->bitmap.buffer) { + FT_Load_Glyph(fFace, gid, fLoadGlyphFlags); + } + FT_GlyphSlot_Own_Bitmap(glyph); + FT_Bitmap_Embolden(glyph->library, &glyph->bitmap, kBitmapEmboldenStrength, 0); + break; + default: + SkDEBUGFAIL("unknown glyph format"); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "src/base/SkUtils.h" + +SkTypeface_FreeType::SkTypeface_FreeType(const SkFontStyle& style, bool isFixedPitch) + : INHERITED(style, isFixedPitch) +{} + +SkTypeface_FreeType::~SkTypeface_FreeType() { + if (fFaceRec) { + SkAutoMutexExclusive ac(f_t_mutex()); + fFaceRec.reset(); + } +} + +// Just made up, so we don't end up storing 1000s of entries +constexpr int kMaxC2GCacheCount = 512; + +void SkTypeface_FreeType::onCharsToGlyphs(const SkUnichar uni[], int count, + SkGlyphID glyphs[]) const { + // Try the cache first, *before* accessing freetype lib/face, as that + // can be very slow. If we do need to compute a new glyphID, then + // access those freetype objects and continue the loop. + + int i; + { + // Optimistically use a shared lock. + SkAutoSharedMutexShared ama(fC2GCacheMutex); + for (i = 0; i < count; ++i) { + int index = fC2GCache.findGlyphIndex(uni[i]); + if (index < 0) { + break; + } + glyphs[i] = SkToU16(index); + } + if (i == count) { + // we're done, no need to access the freetype objects + return; + } + } + + // Need to add more so grab an exclusive lock. + SkAutoSharedMutexExclusive ama(fC2GCacheMutex); + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + sk_bzero(glyphs, count * sizeof(glyphs[0])); + return; + } + + for (; i < count; ++i) { + SkUnichar c = uni[i]; + int index = fC2GCache.findGlyphIndex(c); + if (index >= 0) { + glyphs[i] = SkToU16(index); + } else { + glyphs[i] = SkToU16(FT_Get_Char_Index(face, c)); + fC2GCache.insertCharAndGlyph(~index, c, glyphs[i]); + } + } + + if (fC2GCache.count() > kMaxC2GCacheCount) { + fC2GCache.reset(); + } +} + +int SkTypeface_FreeType::onCountGlyphs() const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + return face ? face->num_glyphs : 0; +} + +SkTypeface::LocalizedStrings* SkTypeface_FreeType::onCreateFamilyNameIterator() const { + sk_sp nameIter = + SkOTUtils::LocalizedStrings_NameTable::MakeForFamilyNames(*this); + if (!nameIter) { + SkString familyName; + this->getFamilyName(&familyName); + SkString language("und"); //undetermined + nameIter = sk_make_sp(familyName, language); + } + return nameIter.release(); +} + +bool SkTypeface_FreeType::onGlyphMaskNeedsCurrentColor() const { + fGlyphMasksMayNeedCurrentColorOnce([this]{ + static constexpr SkFourByteTag COLRTag = SkSetFourByteTag('C', 'O', 'L', 'R'); + fGlyphMasksMayNeedCurrentColor = this->getTableSize(COLRTag) > 0; +#if defined(FT_CONFIG_OPTION_SVG) + static constexpr SkFourByteTag SVGTag = SkSetFourByteTag('S', 'V', 'G', ' '); + fGlyphMasksMayNeedCurrentColor |= this->getTableSize(SVGTag) > 0 ; +#endif // FT_CONFIG_OPTION_SVG + }); + return fGlyphMasksMayNeedCurrentColor; +} + +int SkTypeface_FreeType::onGetVariationDesignPosition( + SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) const +{ + AutoFTAccess fta(this); + return GetVariationDesignPosition(fta, coordinates, coordinateCount); +} + +int SkTypeface_FreeType::onGetVariationDesignParameters( + SkFontParameters::Variation::Axis parameters[], int parameterCount) const +{ + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return -1; + } + + if (!(face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) { + return 0; + } + + FT_MM_Var* variations = nullptr; + if (FT_Get_MM_Var(face, &variations)) { + return -1; + } + UniqueVoidPtr autoFreeVariations(variations); + + if (!parameters || parameterCount < SkToInt(variations->num_axis)) { + return variations->num_axis; + } + + for (FT_UInt i = 0; i < variations->num_axis; ++i) { + parameters[i].tag = variations->axis[i].tag; + parameters[i].min = SkFixedToScalar(variations->axis[i].minimum); + parameters[i].def = SkFixedToScalar(variations->axis[i].def); + parameters[i].max = SkFixedToScalar(variations->axis[i].maximum); + FT_UInt flags = 0; + bool hidden = !FT_Get_Var_Axis_Flags(variations, i, &flags) && + (flags & FT_VAR_AXIS_FLAG_HIDDEN); + parameters[i].setHidden(hidden); + } + + return variations->num_axis; +} + +int SkTypeface_FreeType::onGetTableTags(SkFontTableTag tags[]) const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return 0; + } + + FT_ULong tableCount = 0; + FT_Error error; + + // When 'tag' is nullptr, returns number of tables in 'length'. + error = FT_Sfnt_Table_Info(face, 0, nullptr, &tableCount); + if (error) { + return 0; + } + + if (tags) { + for (FT_ULong tableIndex = 0; tableIndex < tableCount; ++tableIndex) { + FT_ULong tableTag; + FT_ULong tablelength; + error = FT_Sfnt_Table_Info(face, tableIndex, &tableTag, &tablelength); + if (error) { + return 0; + } + tags[tableIndex] = static_cast(tableTag); + } + } + return tableCount; +} + +size_t SkTypeface_FreeType::onGetTableData(SkFontTableTag tag, size_t offset, + size_t length, void* data) const +{ + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return 0; + } + + FT_ULong tableLength = 0; + FT_Error error; + + // When 'length' is 0 it is overwritten with the full table length; 'offset' is ignored. + error = FT_Load_Sfnt_Table(face, tag, 0, nullptr, &tableLength); + if (error) { + return 0; + } + + if (offset > tableLength) { + return 0; + } + FT_ULong size = std::min((FT_ULong)length, tableLength - (FT_ULong)offset); + if (data) { + error = FT_Load_Sfnt_Table(face, tag, offset, reinterpret_cast(data), &size); + if (error) { + return 0; + } + } + + return size; +} + +sk_sp SkTypeface_FreeType::onCopyTableData(SkFontTableTag tag) const { + AutoFTAccess fta(this); + FT_Face face = fta.face(); + if (!face) { + return nullptr; + } + + FT_ULong tableLength = 0; + FT_Error error; + + // When 'length' is 0 it is overwritten with the full table length; 'offset' is ignored. + error = FT_Load_Sfnt_Table(face, tag, 0, nullptr, &tableLength); + if (error) { + return nullptr; + } + + sk_sp data = SkData::MakeUninitialized(tableLength); + if (data) { + error = FT_Load_Sfnt_Table(face, tag, 0, + reinterpret_cast(data->writable_data()), &tableLength); + if (error) { + data.reset(); + } + } + return data; +} + +SkTypeface_FreeType::FaceRec* SkTypeface_FreeType::getFaceRec() const { + f_t_mutex().assertHeld(); + fFTFaceOnce([this]{ fFaceRec = SkTypeface_FreeType::FaceRec::Make(this); }); + return fFaceRec.get(); +} + +std::unique_ptr SkTypeface_FreeType::makeFontData() const { + return this->onMakeFontData(); +} + +void SkTypeface_FreeType::FontDataPaletteToDescriptorPalette(const SkFontData& fontData, + SkFontDescriptor* desc) { + desc->setPaletteIndex(fontData.getPaletteIndex()); + int paletteOverrideCount = fontData.getPaletteOverrideCount(); + auto overrides = desc->setPaletteEntryOverrides(paletteOverrideCount); + for (int i = 0; i < paletteOverrideCount; ++i) { + overrides[i] = fontData.getPaletteOverrides()[i]; + } +} + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// + +SkTypeface_FreeType::Scanner::Scanner() : fLibrary(nullptr) { + if (FT_New_Library(&gFTMemory, &fLibrary)) { + return; + } + FT_Add_Default_Modules(fLibrary); + FT_Set_Default_Properties(fLibrary); +} +SkTypeface_FreeType::Scanner::~Scanner() { + if (fLibrary) { + FT_Done_Library(fLibrary); + } +} + +FT_Face SkTypeface_FreeType::Scanner::openFace(SkStreamAsset* stream, int ttcIndex, + FT_Stream ftStream) const +{ + if (fLibrary == nullptr || stream == nullptr) { + return nullptr; + } + + FT_Open_Args args; + memset(&args, 0, sizeof(args)); + + const void* memoryBase = stream->getMemoryBase(); + + if (memoryBase) { + args.flags = FT_OPEN_MEMORY; + args.memory_base = (const FT_Byte*)memoryBase; + args.memory_size = stream->getLength(); + } else { + memset(ftStream, 0, sizeof(*ftStream)); + ftStream->size = stream->getLength(); + ftStream->descriptor.pointer = stream; + ftStream->read = sk_ft_stream_io; + ftStream->close = sk_ft_stream_close; + + args.flags = FT_OPEN_STREAM; + args.stream = ftStream; + } + + FT_Face face; + if (FT_Open_Face(fLibrary, &args, ttcIndex, &face)) { + return nullptr; + } + return face; +} + +bool SkTypeface_FreeType::Scanner::recognizedFont(SkStreamAsset* stream, int* numFaces) const { + SkAutoMutexExclusive libraryLock(fLibraryMutex); + + FT_StreamRec streamRec; + SkUniqueFTFace face(this->openFace(stream, -1, &streamRec)); + if (!face) { + return false; + } + + *numFaces = face->num_faces; + return true; +} + +bool SkTypeface_FreeType::Scanner::scanFont( + SkStreamAsset* stream, int ttcIndex, + SkString* name, SkFontStyle* style, bool* isFixedPitch, AxisDefinitions* axes) const +{ + SkAutoMutexExclusive libraryLock(fLibraryMutex); + + FT_StreamRec streamRec; + SkUniqueFTFace face(this->openFace(stream, ttcIndex, &streamRec)); + if (!face) { + return false; + } + + int weight = SkFontStyle::kNormal_Weight; + int width = SkFontStyle::kNormal_Width; + SkFontStyle::Slant slant = SkFontStyle::kUpright_Slant; + if (face->style_flags & FT_STYLE_FLAG_BOLD) { + weight = SkFontStyle::kBold_Weight; + } + if (face->style_flags & FT_STYLE_FLAG_ITALIC) { + slant = SkFontStyle::kItalic_Slant; + } + + bool hasAxes = face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS; + TT_OS2* os2 = static_cast(FT_Get_Sfnt_Table(face.get(), ft_sfnt_os2)); + bool hasOs2 = os2 && os2->version != 0xffff; + + PS_FontInfoRec psFontInfo; + + if (hasOs2) { + weight = os2->usWeightClass; + width = os2->usWidthClass; + + // OS/2::fsSelection bit 9 indicates oblique. + if (SkToBool(os2->fsSelection & (1u << 9))) { + slant = SkFontStyle::kOblique_Slant; + } + } + + // Let variable axes override properties from the OS/2 table. + if (hasAxes) { + AxisDefinitions axisDefinitions; + if (GetAxes(face.get(), &axisDefinitions)) { + size_t numAxes = axisDefinitions.size(); + static constexpr SkFourByteTag wghtTag = SkSetFourByteTag('w', 'g', 'h', 't'); + static constexpr SkFourByteTag wdthTag = SkSetFourByteTag('w', 'd', 't', 'h'); + static constexpr SkFourByteTag slntTag = SkSetFourByteTag('s', 'l', 'n', 't'); + std::optional wghtIndex; + std::optional wdthIndex; + std::optional slntIndex; + for(size_t i = 0; i < numAxes; ++i) { + if (axisDefinitions[i].fTag == wghtTag) { + // Rough validity check, is there sufficient spread and are ranges + // within 0-1000. + int wghtRange = SkFixedToScalar(axisDefinitions[i].fMaximum) - + SkFixedToScalar(axisDefinitions[i].fMinimum); + if (wghtRange > 5 && wghtRange <= 1000 && + SkFixedToScalar(axisDefinitions[i].fMaximum) <= 1000) { + wghtIndex = i; + } + } + if (axisDefinitions[i].fTag == wdthTag) { + // Rough validity check, is there a spread and are ranges within + // 0-500. + int widthRange = SkFixedToScalar(axisDefinitions[i].fMaximum) - + SkFixedToScalar(axisDefinitions[i].fMinimum); + if (widthRange > 0 && widthRange <= 500 && + SkFixedToScalar(axisDefinitions[i].fMaximum) <= 500) + wdthIndex = i; + } + if (axisDefinitions[i].fTag == slntTag) + slntIndex = i; + } + AutoSTMalloc<4, FT_Fixed> coords(numAxes); + if ((wghtIndex || wdthIndex || slntIndex) && + !FT_Get_Var_Design_Coordinates(face.get(), numAxes, coords.get())) { + if (wghtIndex) { + SkASSERT(*wghtIndex < numAxes); + weight = SkScalarRoundToInt(SkFixedToScalar(coords[*wghtIndex])); + } + if (wdthIndex) { + SkASSERT(*wdthIndex < numAxes); + SkScalar wdthValue = SkFixedToScalar(coords[*wdthIndex]); + width = SkFontDescriptor::SkFontStyleWidthForWidthAxisValue(wdthValue); + } + if (slntIndex) { + SkASSERT(*slntIndex < numAxes); + // https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxistag_slnt + // "Scale interpretation: Values can be interpreted as the angle, + // in counter-clockwise degrees, of oblique slant from whatever + // the designer considers to be upright for that font design." + if (SkFixedToScalar(coords[*slntIndex]) < 0) { + slant = SkFontStyle::kOblique_Slant; + } + } + } + } + } + + if (!hasOs2 && !hasAxes && 0 == FT_Get_PS_Font_Info(face.get(), &psFontInfo) && psFontInfo.weight) { + static const struct { + char const * const name; + int const weight; + } commonWeights [] = { + // There are probably more common names, but these are known to exist. + { "all", SkFontStyle::kNormal_Weight }, // Multiple Masters usually default to normal. + { "black", SkFontStyle::kBlack_Weight }, + { "bold", SkFontStyle::kBold_Weight }, + { "book", (SkFontStyle::kNormal_Weight + SkFontStyle::kLight_Weight)/2 }, + { "demi", SkFontStyle::kSemiBold_Weight }, + { "demibold", SkFontStyle::kSemiBold_Weight }, + { "extra", SkFontStyle::kExtraBold_Weight }, + { "extrabold", SkFontStyle::kExtraBold_Weight }, + { "extralight", SkFontStyle::kExtraLight_Weight }, + { "hairline", SkFontStyle::kThin_Weight }, + { "heavy", SkFontStyle::kBlack_Weight }, + { "light", SkFontStyle::kLight_Weight }, + { "medium", SkFontStyle::kMedium_Weight }, + { "normal", SkFontStyle::kNormal_Weight }, + { "plain", SkFontStyle::kNormal_Weight }, + { "regular", SkFontStyle::kNormal_Weight }, + { "roman", SkFontStyle::kNormal_Weight }, + { "semibold", SkFontStyle::kSemiBold_Weight }, + { "standard", SkFontStyle::kNormal_Weight }, + { "thin", SkFontStyle::kThin_Weight }, + { "ultra", SkFontStyle::kExtraBold_Weight }, + { "ultrablack", SkFontStyle::kExtraBlack_Weight }, + { "ultrabold", SkFontStyle::kExtraBold_Weight }, + { "ultraheavy", SkFontStyle::kExtraBlack_Weight }, + { "ultralight", SkFontStyle::kExtraLight_Weight }, + }; + int const index = SkStrLCSearch(&commonWeights[0].name, std::size(commonWeights), + psFontInfo.weight, sizeof(commonWeights[0])); + if (index >= 0) { + weight = commonWeights[index].weight; + } else { + LOG_INFO("Do not know weight for: %s (%s) \n", face->family_name, psFontInfo.weight); + } + } + + if (name != nullptr) { + name->set(face->family_name); + } + if (style != nullptr) { + *style = SkFontStyle(weight, width, slant); + } + if (isFixedPitch != nullptr) { + *isFixedPitch = FT_IS_FIXED_WIDTH(face); + } + + if (axes != nullptr && !GetAxes(face.get(), axes)) { + return false; + } + return true; +} + +bool SkTypeface_FreeType::Scanner::GetAxes(FT_Face face, AxisDefinitions* axes) { + SkASSERT(face && axes); + if (face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS) { + FT_MM_Var* variations = nullptr; + FT_Error err = FT_Get_MM_Var(face, &variations); + if (err) { + LOG_INFO("INFO: font %s claims to have variations, but none found.\n", + face->family_name); + return false; + } + UniqueVoidPtr autoFreeVariations(variations); + + axes->reset(variations->num_axis); + for (FT_UInt i = 0; i < variations->num_axis; ++i) { + const FT_Var_Axis& ftAxis = variations->axis[i]; + (*axes)[i].fTag = ftAxis.tag; + (*axes)[i].fMinimum = ftAxis.minimum; + (*axes)[i].fDefault = ftAxis.def; + (*axes)[i].fMaximum = ftAxis.maximum; + } + } + return true; +} + +/*static*/ void SkTypeface_FreeType::Scanner::computeAxisValues( + AxisDefinitions axisDefinitions, + const SkFontArguments::VariationPosition position, + SkFixed* axisValues, + const SkString& name, + const SkFontArguments::VariationPosition::Coordinate* current) +{ + for (int i = 0; i < axisDefinitions.size(); ++i) { + const Scanner::AxisDefinition& axisDefinition = axisDefinitions[i]; + const SkScalar axisMin = SkFixedToScalar(axisDefinition.fMinimum); + const SkScalar axisMax = SkFixedToScalar(axisDefinition.fMaximum); + + // Start with the default value. + axisValues[i] = axisDefinition.fDefault; + + // Then the current value. + if (current) { + for (int j = 0; j < axisDefinitions.size(); ++j) { + const auto& coordinate = current[j]; + if (axisDefinition.fTag == coordinate.axis) { + const SkScalar axisValue = SkTPin(coordinate.value, axisMin, axisMax); + axisValues[i] = SkScalarToFixed(axisValue); + break; + } + } + } + + // Then the requested value. + // The position may be over specified. If there are multiple values for a given axis, + // use the last one since that's what css-fonts-4 requires. + for (int j = position.coordinateCount; j --> 0;) { + const auto& coordinate = position.coordinates[j]; + if (axisDefinition.fTag == coordinate.axis) { + const SkScalar axisValue = SkTPin(coordinate.value, axisMin, axisMax); + if (coordinate.value != axisValue) { + LOG_INFO("Requested font axis value out of range: " + "%s '%c%c%c%c' %f; pinned to %f.\n", + name.c_str(), + (axisDefinition.fTag >> 24) & 0xFF, + (axisDefinition.fTag >> 16) & 0xFF, + (axisDefinition.fTag >> 8) & 0xFF, + (axisDefinition.fTag ) & 0xFF, + SkScalarToDouble(coordinate.value), + SkScalarToDouble(axisValue)); + } + axisValues[i] = SkScalarToFixed(axisValue); + break; + } + } + // TODO: warn on defaulted axis? + } + + SkDEBUGCODE( + // Check for axis specified, but not matched in font. + for (int i = 0; i < position.coordinateCount; ++i) { + SkFourByteTag skTag = position.coordinates[i].axis; + bool found = false; + for (int j = 0; j < axisDefinitions.size(); ++j) { + if (skTag == axisDefinitions[j].fTag) { + found = true; + break; + } + } + if (!found) { + LOG_INFO("Requested font axis not found: %s '%c%c%c%c'\n", + name.c_str(), + (skTag >> 24) & 0xFF, + (skTag >> 16) & 0xFF, + (skTag >> 8) & 0xFF, + (skTag) & 0xFF); + } + } + ) +} + + +SkTypeface_FreeTypeStream::SkTypeface_FreeTypeStream(std::unique_ptr fontData, + const SkString familyName, + const SkFontStyle& style, bool isFixedPitch) + : SkTypeface_FreeType(style, isFixedPitch) + , fFamilyName(std::move(familyName)) + , fData(std::move(fontData)) +{ } + +SkTypeface_FreeTypeStream::~SkTypeface_FreeTypeStream() {} + +void SkTypeface_FreeTypeStream::onGetFamilyName(SkString* familyName) const { + *familyName = fFamilyName; +} + +std::unique_ptr SkTypeface_FreeTypeStream::onOpenStream(int* ttcIndex) const { + *ttcIndex = fData->getIndex(); + return fData->getStream()->duplicate(); +} + +std::unique_ptr SkTypeface_FreeTypeStream::onMakeFontData() const { + return std::make_unique(*fData); +} + +sk_sp SkTypeface_FreeTypeStream::onMakeClone(const SkFontArguments& args) const { + std::unique_ptr data = this->cloneFontData(args); + if (!data) { + return nullptr; + } + + SkString familyName; + this->getFamilyName(&familyName); + + return sk_make_sp( + std::move(data), familyName, this->fontStyle(), this->isFixedPitch()); +} + +void SkTypeface_FreeTypeStream::onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const { + desc->setFamilyName(fFamilyName.c_str()); + desc->setStyle(this->fontStyle()); + desc->setFactoryId(SkTypeface_FreeType::FactoryId); + SkTypeface_FreeType::FontDataPaletteToDescriptorPalette(*fData, desc); + *serialize = true; +} + +sk_sp SkTypeface_FreeType::MakeFromStream(std::unique_ptr stream, + const SkFontArguments& args) { + using Scanner = SkTypeface_FreeType::Scanner; + static Scanner scanner; + bool isFixedPitch; + SkFontStyle style; + SkString name; + Scanner::AxisDefinitions axisDefinitions; + if (!scanner.scanFont(stream.get(), args.getCollectionIndex(), + &name, &style, &isFixedPitch, &axisDefinitions)) { + return nullptr; + } + + const SkFontArguments::VariationPosition position = args.getVariationDesignPosition(); + AutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.size()); + Scanner::computeAxisValues(axisDefinitions, position, axisValues, name); + + auto data = std::make_unique( + std::move(stream), args.getCollectionIndex(), args.getPalette().index, + axisValues.get(), axisDefinitions.size(), + args.getPalette().overrides, args.getPalette().overrideCount); + return sk_make_sp(std::move(data), name, style, isFixedPitch); +} diff --git a/gfx/skia/skia/src/ports/SkFontHost_FreeType_common.cpp b/gfx/skia/skia/src/ports/SkFontHost_FreeType_common.cpp new file mode 100644 index 0000000000..4d3abe8ea7 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontHost_FreeType_common.cpp @@ -0,0 +1,2091 @@ +/* + * Copyright 2006-2012 The Android Open Source Project + * Copyright 2012 Mozilla Foundation + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkColor.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkGraphics.h" +#include "include/core/SkOpenTypeSVGDecoder.h" +#include "include/core/SkPath.h" +#include "include/effects/SkGradientShader.h" +#include "include/pathops/SkPathOps.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkFDot6.h" +#include "src/core/SkSwizzlePriv.h" +#include "src/ports/SkFontHost_FreeType_common.h" + +#include +#include + +#include +#include FT_FREETYPE_H +#include FT_BITMAP_H +#ifdef FT_COLOR_H +# include FT_COLOR_H +#endif +#include FT_IMAGE_H +#include FT_OUTLINE_H +#include FT_SIZES_H +// In the past, FT_GlyphSlot_Own_Bitmap was defined in this header file. +#include FT_SYNTHESIS_H + +namespace { +[[maybe_unused]] static inline const constexpr bool kSkShowTextBlitCoverage = false; +} + +#if defined(FT_CONFIG_OPTION_SVG) +# include FT_OTSVG_H +#endif + +#ifdef TT_SUPPORT_COLRV1 +// FT_ClipBox and FT_Get_Color_Glyph_ClipBox introduced VER-2-11-0-18-g47cf8ebf4 +// FT_COLR_COMPOSITE_PLUS and renumbering introduced VER-2-11-0-21-ge40ae7569 +// FT_SIZEOF_LONG_LONG introduced VER-2-11-0-31-gffdac8d67 +// FT_PaintRadialGradient changed size and layout at VER-2-11-0-147-gd3d3ff76d +// FT_STATIC_CAST introduced VER-2-11-0-172-g9079c5d91 +// So undefine TT_SUPPORT_COLRV1 before 2.11.1 but not if FT_STATIC_CAST is defined. +#if (((FREETYPE_MAJOR) < 2) || \ + ((FREETYPE_MAJOR) == 2 && (FREETYPE_MINOR) < 11) || \ + ((FREETYPE_MAJOR) == 2 && (FREETYPE_MINOR) == 11 && (FREETYPE_PATCH) < 1)) && \ + !defined(FT_STATIC_CAST) +# undef TT_SUPPORT_COLRV1 +#else +# include "src/base/SkScopeExit.h" +#endif +#endif + +// FT_OUTLINE_OVERLAP was added in FreeType 2.10.3 +#ifndef FT_OUTLINE_OVERLAP +# define FT_OUTLINE_OVERLAP 0x40 +#endif + +// FT_LOAD_COLOR and the corresponding FT_Pixel_Mode::FT_PIXEL_MODE_BGRA +// were introduced in FreeType 2.5.0. +// The following may be removed once FreeType 2.5.0 is required to build. +#ifndef FT_LOAD_COLOR +# define FT_LOAD_COLOR ( 1L << 20 ) +# define FT_PIXEL_MODE_BGRA 7 +#endif + +#ifndef FT_LOAD_BITMAP_METRICS_ONLY +# define FT_LOAD_BITMAP_METRICS_ONLY ( 1L << 22 ) +#endif + +#ifdef SK_DEBUG +const char* SkTraceFtrGetError(int e) { + switch ((FT_Error)e) { + #undef FTERRORS_H_ + #define FT_ERRORDEF( e, v, s ) case v: return s; + #define FT_ERROR_START_LIST + #define FT_ERROR_END_LIST + #include FT_ERRORS_H + #undef FT_ERRORDEF + #undef FT_ERROR_START_LIST + #undef FT_ERROR_END_LIST + default: return ""; + } +} +#endif // SK_DEBUG + +#ifdef TT_SUPPORT_COLRV1 +bool operator==(const FT_OpaquePaint& a, const FT_OpaquePaint& b) { + return a.p == b.p && a.insert_root_transform == b.insert_root_transform; +} + +// The stop_offset field is being upgraded to a larger representation in FreeType, and changed from +// 2.14 to 16.16. Adjust the shift factor depending on size type. +static_assert(sizeof(FT_Fixed) != sizeof(FT_F2Dot14)); +constexpr float kColorStopShift = + sizeof(FT_ColorStop::stop_offset) == sizeof(FT_F2Dot14) ? 1 << 14 : 1 << 16; +#endif + +namespace { +using SkUniqueFTSize = std::unique_ptr>; + +FT_Pixel_Mode compute_pixel_mode(SkMask::Format format) { + switch (format) { + case SkMask::kBW_Format: + return FT_PIXEL_MODE_MONO; + case SkMask::kA8_Format: + default: + return FT_PIXEL_MODE_GRAY; + } +} + +/////////////////////////////////////////////////////////////////////////////// + +uint16_t packTriple(U8CPU r, U8CPU g, U8CPU b) { + if constexpr (kSkShowTextBlitCoverage) { + r = std::max(r, (U8CPU)0x40); + g = std::max(g, (U8CPU)0x40); + b = std::max(b, (U8CPU)0x40); + } + return SkPack888ToRGB16(r, g, b); +} + +uint16_t grayToRGB16(U8CPU gray) { + if constexpr (kSkShowTextBlitCoverage) { + gray = std::max(gray, (U8CPU)0x40); + } + return SkPack888ToRGB16(gray, gray, gray); +} + +int bittst(const uint8_t data[], int bitOffset) { + SkASSERT(bitOffset >= 0); + int lowBit = data[bitOffset >> 3] >> (~bitOffset & 7); + return lowBit & 1; +} + +/** + * Copies a FT_Bitmap into an SkMask with the same dimensions. + * + * FT_PIXEL_MODE_MONO + * FT_PIXEL_MODE_GRAY + * FT_PIXEL_MODE_LCD + * FT_PIXEL_MODE_LCD_V + */ +template +void copyFT2LCD16(const FT_Bitmap& bitmap, const SkMask& mask, int lcdIsBGR, + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) +{ + SkASSERT(SkMask::kLCD16_Format == mask.fFormat); + if (FT_PIXEL_MODE_LCD != bitmap.pixel_mode) { + SkASSERT(mask.fBounds.width() == static_cast(bitmap.width)); + } + if (FT_PIXEL_MODE_LCD_V != bitmap.pixel_mode) { + SkASSERT(mask.fBounds.height() == static_cast(bitmap.rows)); + } + + const uint8_t* src = bitmap.buffer; + uint16_t* dst = reinterpret_cast(mask.fImage); + const size_t dstRB = mask.fRowBytes; + + const int width = mask.fBounds.width(); + const int height = mask.fBounds.height(); + + switch (bitmap.pixel_mode) { + case FT_PIXEL_MODE_MONO: + for (int y = height; y --> 0;) { + for (int x = 0; x < width; ++x) { + dst[x] = -bittst(src, x); + } + dst = (uint16_t*)((char*)dst + dstRB); + src += bitmap.pitch; + } + break; + case FT_PIXEL_MODE_GRAY: + for (int y = height; y --> 0;) { + for (int x = 0; x < width; ++x) { + dst[x] = grayToRGB16(src[x]); + } + dst = (uint16_t*)((char*)dst + dstRB); + src += bitmap.pitch; + } + break; + case FT_PIXEL_MODE_LCD: + SkASSERT(3 * mask.fBounds.width() == static_cast(bitmap.width)); + for (int y = height; y --> 0;) { + const uint8_t* triple = src; + if (lcdIsBGR) { + for (int x = 0; x < width; x++) { + dst[x] = packTriple(sk_apply_lut_if(triple[2], tableR), + sk_apply_lut_if(triple[1], tableG), + sk_apply_lut_if(triple[0], tableB)); + triple += 3; + } + } else { + for (int x = 0; x < width; x++) { + dst[x] = packTriple(sk_apply_lut_if(triple[0], tableR), + sk_apply_lut_if(triple[1], tableG), + sk_apply_lut_if(triple[2], tableB)); + triple += 3; + } + } + src += bitmap.pitch; + dst = (uint16_t*)((char*)dst + dstRB); + } + break; + case FT_PIXEL_MODE_LCD_V: + SkASSERT(3 * mask.fBounds.height() == static_cast(bitmap.rows)); + for (int y = height; y --> 0;) { + const uint8_t* srcR = src; + const uint8_t* srcG = srcR + bitmap.pitch; + const uint8_t* srcB = srcG + bitmap.pitch; + if (lcdIsBGR) { + using std::swap; + swap(srcR, srcB); + } + for (int x = 0; x < width; x++) { + dst[x] = packTriple(sk_apply_lut_if(*srcR++, tableR), + sk_apply_lut_if(*srcG++, tableG), + sk_apply_lut_if(*srcB++, tableB)); + } + src += 3 * bitmap.pitch; + dst = (uint16_t*)((char*)dst + dstRB); + } + break; + default: + SkDEBUGF("FT_Pixel_Mode %d", bitmap.pixel_mode); + SkDEBUGFAIL("unsupported FT_Pixel_Mode for LCD16"); + break; + } +} + +/** + * Copies a FT_Bitmap into an SkMask with the same dimensions. + * + * Yes, No, Never Requested, Never Produced + * + * kBW kA8 k3D kARGB32 kLCD16 + * FT_PIXEL_MODE_MONO Y Y NR N Y + * FT_PIXEL_MODE_GRAY N Y NR N Y + * FT_PIXEL_MODE_GRAY2 NP NP NR NP NP + * FT_PIXEL_MODE_GRAY4 NP NP NR NP NP + * FT_PIXEL_MODE_LCD NP NP NR NP NP + * FT_PIXEL_MODE_LCD_V NP NP NR NP NP + * FT_PIXEL_MODE_BGRA N N NR Y N + * + * TODO: All of these N need to be Y or otherwise ruled out. + */ +void copyFTBitmap(const FT_Bitmap& srcFTBitmap, SkMask& dstMask) { + SkASSERTF(dstMask.fBounds.width() == static_cast(srcFTBitmap.width), + "dstMask.fBounds.width() = %d\n" + "static_cast(srcFTBitmap.width) = %d", + dstMask.fBounds.width(), + static_cast(srcFTBitmap.width) + ); + SkASSERTF(dstMask.fBounds.height() == static_cast(srcFTBitmap.rows), + "dstMask.fBounds.height() = %d\n" + "static_cast(srcFTBitmap.rows) = %d", + dstMask.fBounds.height(), + static_cast(srcFTBitmap.rows) + ); + + const uint8_t* src = reinterpret_cast(srcFTBitmap.buffer); + const FT_Pixel_Mode srcFormat = static_cast(srcFTBitmap.pixel_mode); + // FT_Bitmap::pitch is an int and allowed to be negative. + const int srcPitch = srcFTBitmap.pitch; + const size_t srcRowBytes = SkTAbs(srcPitch); + + uint8_t* dst = dstMask.fImage; + const SkMask::Format dstFormat = static_cast(dstMask.fFormat); + const size_t dstRowBytes = dstMask.fRowBytes; + + const size_t width = srcFTBitmap.width; + const size_t height = srcFTBitmap.rows; + + if (SkMask::kLCD16_Format == dstFormat) { + copyFT2LCD16(srcFTBitmap, dstMask, false, nullptr, nullptr, nullptr); + return; + } + + if ((FT_PIXEL_MODE_MONO == srcFormat && SkMask::kBW_Format == dstFormat) || + (FT_PIXEL_MODE_GRAY == srcFormat && SkMask::kA8_Format == dstFormat)) + { + size_t commonRowBytes = std::min(srcRowBytes, dstRowBytes); + for (size_t y = height; y --> 0;) { + memcpy(dst, src, commonRowBytes); + src += srcPitch; + dst += dstRowBytes; + } + } else if (FT_PIXEL_MODE_MONO == srcFormat && SkMask::kA8_Format == dstFormat) { + for (size_t y = height; y --> 0;) { + uint8_t byte = 0; + int bits = 0; + const uint8_t* src_row = src; + uint8_t* dst_row = dst; + for (size_t x = width; x --> 0;) { + if (0 == bits) { + byte = *src_row++; + bits = 8; + } + *dst_row++ = byte & 0x80 ? 0xff : 0x00; + bits--; + byte <<= 1; + } + src += srcPitch; + dst += dstRowBytes; + } + } else if (FT_PIXEL_MODE_BGRA == srcFormat && SkMask::kARGB32_Format == dstFormat) { + // FT_PIXEL_MODE_BGRA is pre-multiplied. + for (size_t y = height; y --> 0;) { + const uint8_t* src_row = src; + SkPMColor* dst_row = reinterpret_cast(dst); + for (size_t x = 0; x < width; ++x) { + uint8_t b = *src_row++; + uint8_t g = *src_row++; + uint8_t r = *src_row++; + uint8_t a = *src_row++; + *dst_row++ = SkPackARGB32(a, r, g, b); + if constexpr (kSkShowTextBlitCoverage) { + *(dst_row-1) = SkFourByteInterp256(*(dst_row-1), SK_ColorWHITE, 0x40); + } + } + src += srcPitch; + dst += dstRowBytes; + } + } else { + SkDEBUGF("FT_Pixel_Mode %d, SkMask::Format %d\n", srcFormat, dstFormat); + SkDEBUGFAIL("unsupported combination of FT_Pixel_Mode and SkMask::Format"); + } +} + +inline int convert_8_to_1(unsigned byte) { + SkASSERT(byte <= 0xFF); + // Arbitrary decision that making the cutoff at 1/4 instead of 1/2 in general looks better. + return (byte >> 6) != 0; +} + +uint8_t pack_8_to_1(const uint8_t alpha[8]) { + unsigned bits = 0; + for (int i = 0; i < 8; ++i) { + bits <<= 1; + bits |= convert_8_to_1(alpha[i]); + } + return SkToU8(bits); +} + +void packA8ToA1(const SkMask& mask, const uint8_t* src, size_t srcRB) { + const int height = mask.fBounds.height(); + const int width = mask.fBounds.width(); + const int octs = width >> 3; + const int leftOverBits = width & 7; + + uint8_t* dst = mask.fImage; + const int dstPad = mask.fRowBytes - SkAlign8(width)/8; + SkASSERT(dstPad >= 0); + + const int srcPad = srcRB - width; + SkASSERT(srcPad >= 0); + + for (int y = 0; y < height; ++y) { + for (int i = 0; i < octs; ++i) { + *dst++ = pack_8_to_1(src); + src += 8; + } + if (leftOverBits > 0) { + unsigned bits = 0; + int shift = 7; + for (int i = 0; i < leftOverBits; ++i, --shift) { + bits |= convert_8_to_1(*src++) << shift; + } + *dst++ = bits; + } + src += srcPad; + dst += dstPad; + } +} + +inline SkMask::Format SkMaskFormat_for_SkColorType(SkColorType colorType) { + switch (colorType) { + case kAlpha_8_SkColorType: + return SkMask::kA8_Format; + case kN32_SkColorType: + return SkMask::kARGB32_Format; + default: + SkDEBUGFAIL("unsupported SkBitmap::Config"); + return SkMask::kA8_Format; + } +} + +inline SkColorType SkColorType_for_FTPixelMode(FT_Pixel_Mode pixel_mode) { + switch (pixel_mode) { + case FT_PIXEL_MODE_MONO: + case FT_PIXEL_MODE_GRAY: + return kAlpha_8_SkColorType; + case FT_PIXEL_MODE_BGRA: + return kN32_SkColorType; + default: + SkDEBUGFAIL("unsupported FT_PIXEL_MODE"); + return kAlpha_8_SkColorType; + } +} + +inline SkColorType SkColorType_for_SkMaskFormat(SkMask::Format format) { + switch (format) { + case SkMask::kBW_Format: + case SkMask::kA8_Format: + case SkMask::kLCD16_Format: + return kAlpha_8_SkColorType; + case SkMask::kARGB32_Format: + return kN32_SkColorType; + default: + SkDEBUGFAIL("unsupported destination SkBitmap::Config"); + return kAlpha_8_SkColorType; + } +} + +// Only build COLRv1 rendering code if FreeType is new enough to have COLRv1 +// additions. FreeType defines a macro in the ftoption header to tell us whether +// it does support these features. +#ifdef TT_SUPPORT_COLRV1 + +const uint16_t kForegroundColorPaletteIndex = 0xFFFF; + +// This linear interpolation is used for calculating a truncated color line in special edge cases. +// This interpolation needs to be kept in sync with what the gradient shader would normally do when +// truncating and drawing color lines. When drawing into N32 surfaces, this is expected to be true. +// If that changes, or if we support other color spaces in CPAL tables at some point, this needs to +// be looked at. +SkColor lerpSkColor(SkColor c0, SkColor c1, float t) { + // Due to the floating point calculation in the caller, when interpolating between very narrow + // stops, we may get values outside the interpolation range, guard against these. + if (t < 0) { + return c0; + } + if (t > 1) { + return c1; + } + const auto c0_4f = Sk4f_fromL32(c0), c1_4f = Sk4f_fromL32(c1), + c_4f = c0_4f + (c1_4f - c0_4f) * t; + + return Sk4f_toL32(c_4f); +} + +enum TruncateStops { + TruncateStart, + TruncateEnd +}; + +// Truncate a vector of color stops at a previously computed stop position and insert at that +// position the color interpolated between the surrounding stops. +void truncateToStopInterpolating(SkScalar zeroRadiusStop, + std::vector& colors, + std::vector& stops, + TruncateStops truncateStops) { + if (stops.size() <= 1u || + zeroRadiusStop < stops.front() || stops.back() < zeroRadiusStop) + { + return; + } + + size_t afterIndex = (truncateStops == TruncateStart) + ? std::lower_bound(stops.begin(), stops.end(), zeroRadiusStop) - stops.begin() + : std::upper_bound(stops.begin(), stops.end(), zeroRadiusStop) - stops.begin(); + + const float t = (zeroRadiusStop - stops[afterIndex - 1]) / + (stops[afterIndex] - stops[afterIndex - 1]); + SkColor lerpColor = lerpSkColor(colors[afterIndex - 1], colors[afterIndex], t); + + if (truncateStops == TruncateStart) { + stops.erase(stops.begin(), stops.begin() + afterIndex); + colors.erase(colors.begin(), colors.begin() + afterIndex); + stops.insert(stops.begin(), 0); + colors.insert(colors.begin(), lerpColor); + } else { + stops.erase(stops.begin() + afterIndex, stops.end()); + colors.erase(colors.begin() + afterIndex, colors.end()); + stops.insert(stops.end(), 1); + colors.insert(colors.end(), lerpColor); + } +} + +struct OpaquePaintHasher { + size_t operator()(const FT_OpaquePaint& opaquePaint) { + return SkGoodHash()(opaquePaint.p) ^ + SkGoodHash()(opaquePaint.insert_root_transform); + } +}; + +using VisitedSet = SkTHashSet; + +bool generateFacePathCOLRv1(FT_Face face, SkGlyphID glyphID, SkPath* path); + +inline float SkColrV1AlphaToFloat(uint16_t alpha) { return (alpha / float(1 << 14)); } + + +inline SkTileMode ToSkTileMode(FT_PaintExtend extendMode) { + switch (extendMode) { + case FT_COLR_PAINT_EXTEND_REPEAT: + return SkTileMode::kRepeat; + case FT_COLR_PAINT_EXTEND_REFLECT: + return SkTileMode::kMirror; + default: + return SkTileMode::kClamp; + } +} + +inline SkBlendMode ToSkBlendMode(FT_Composite_Mode compositeMode) { + switch (compositeMode) { + case FT_COLR_COMPOSITE_CLEAR: + return SkBlendMode::kClear; + case FT_COLR_COMPOSITE_SRC: + return SkBlendMode::kSrc; + case FT_COLR_COMPOSITE_DEST: + return SkBlendMode::kDst; + case FT_COLR_COMPOSITE_SRC_OVER: + return SkBlendMode::kSrcOver; + case FT_COLR_COMPOSITE_DEST_OVER: + return SkBlendMode::kDstOver; + case FT_COLR_COMPOSITE_SRC_IN: + return SkBlendMode::kSrcIn; + case FT_COLR_COMPOSITE_DEST_IN: + return SkBlendMode::kDstIn; + case FT_COLR_COMPOSITE_SRC_OUT: + return SkBlendMode::kSrcOut; + case FT_COLR_COMPOSITE_DEST_OUT: + return SkBlendMode::kDstOut; + case FT_COLR_COMPOSITE_SRC_ATOP: + return SkBlendMode::kSrcATop; + case FT_COLR_COMPOSITE_DEST_ATOP: + return SkBlendMode::kDstATop; + case FT_COLR_COMPOSITE_XOR: + return SkBlendMode::kXor; + case FT_COLR_COMPOSITE_PLUS: + return SkBlendMode::kPlus; + case FT_COLR_COMPOSITE_SCREEN: + return SkBlendMode::kScreen; + case FT_COLR_COMPOSITE_OVERLAY: + return SkBlendMode::kOverlay; + case FT_COLR_COMPOSITE_DARKEN: + return SkBlendMode::kDarken; + case FT_COLR_COMPOSITE_LIGHTEN: + return SkBlendMode::kLighten; + case FT_COLR_COMPOSITE_COLOR_DODGE: + return SkBlendMode::kColorDodge; + case FT_COLR_COMPOSITE_COLOR_BURN: + return SkBlendMode::kColorBurn; + case FT_COLR_COMPOSITE_HARD_LIGHT: + return SkBlendMode::kHardLight; + case FT_COLR_COMPOSITE_SOFT_LIGHT: + return SkBlendMode::kSoftLight; + case FT_COLR_COMPOSITE_DIFFERENCE: + return SkBlendMode::kDifference; + case FT_COLR_COMPOSITE_EXCLUSION: + return SkBlendMode::kExclusion; + case FT_COLR_COMPOSITE_MULTIPLY: + return SkBlendMode::kMultiply; + case FT_COLR_COMPOSITE_HSL_HUE: + return SkBlendMode::kHue; + case FT_COLR_COMPOSITE_HSL_SATURATION: + return SkBlendMode::kSaturation; + case FT_COLR_COMPOSITE_HSL_COLOR: + return SkBlendMode::kColor; + case FT_COLR_COMPOSITE_HSL_LUMINOSITY: + return SkBlendMode::kLuminosity; + default: + return SkBlendMode::kDst; + } +} + +inline SkMatrix ToSkMatrix(FT_Affine23 affine23) { + // Convert from FreeType's FT_Affine23 column major order to SkMatrix row-major order. + return SkMatrix::MakeAll( + SkFixedToScalar(affine23.xx), -SkFixedToScalar(affine23.xy), SkFixedToScalar(affine23.dx), + -SkFixedToScalar(affine23.yx), SkFixedToScalar(affine23.yy), -SkFixedToScalar(affine23.dy), + 0, 0, 1); +} + +inline SkPoint SkVectorProjection(SkPoint a, SkPoint b) { + SkScalar length = b.length(); + if (!length) { + return SkPoint(); + } + SkPoint bNormalized = b; + bNormalized.normalize(); + bNormalized.scale(SkPoint::DotProduct(a, b) / length); + return bNormalized; +} + +bool colrv1_configure_skpaint(FT_Face face, + const SkSpan& palette, + const SkColor foregroundColor, + const FT_COLR_Paint& colrPaint, + SkPaint* paint) { + auto fetchColorStops = [&face, &palette, &foregroundColor]( + const FT_ColorStopIterator& colorStopIterator, + std::vector& stops, + std::vector& colors) -> bool { + const FT_UInt colorStopCount = colorStopIterator.num_color_stops; + if (colorStopCount == 0) { + return false; + } + + // 5.7.11.2.4 ColorIndex, ColorStop and ColorLine + // "Applications shall apply the colorStops in increasing stopOffset order." + struct ColorStop { + SkScalar pos; + SkColor color; + }; + std::vector colorStopsSorted; + colorStopsSorted.resize(colorStopCount); + + FT_ColorStop color_stop; + FT_ColorStopIterator mutable_color_stop_iterator = colorStopIterator; + while (FT_Get_Colorline_Stops(face, &color_stop, &mutable_color_stop_iterator)) { + FT_UInt index = mutable_color_stop_iterator.current_color_stop - 1; + colorStopsSorted[index].pos = color_stop.stop_offset / kColorStopShift; + FT_UInt16& palette_index = color_stop.color.palette_index; + if (palette_index == kForegroundColorPaletteIndex) { + U8CPU newAlpha = SkColorGetA(foregroundColor) * + SkColrV1AlphaToFloat(color_stop.color.alpha); + colorStopsSorted[index].color = SkColorSetA(foregroundColor, newAlpha); + } else if (palette_index >= palette.size()) { + return false; + } else { + U8CPU newAlpha = SkColorGetA(palette[palette_index]) * + SkColrV1AlphaToFloat(color_stop.color.alpha); + colorStopsSorted[index].color = SkColorSetA(palette[palette_index], newAlpha); + } + } + + std::stable_sort(colorStopsSorted.begin(), colorStopsSorted.end(), + [](const ColorStop& a, const ColorStop& b) { return a.pos < b.pos; }); + + stops.resize(colorStopCount); + colors.resize(colorStopCount); + for (size_t i = 0; i < colorStopCount; ++i) { + stops[i] = colorStopsSorted[i].pos; + colors[i] = colorStopsSorted[i].color; + } + return true; + }; + + switch (colrPaint.format) { + case FT_COLR_PAINTFORMAT_SOLID: { + FT_PaintSolid solid = colrPaint.u.solid; + + // Dont' draw anything with this color if the palette index is out of bounds. + SkColor color = SK_ColorTRANSPARENT; + if (solid.color.palette_index == kForegroundColorPaletteIndex) { + U8CPU newAlpha = SkColorGetA(foregroundColor) * + SkColrV1AlphaToFloat(solid.color.alpha); + color = SkColorSetA(foregroundColor, newAlpha); + } else if (solid.color.palette_index >= palette.size()) { + return false; + } else { + U8CPU newAlpha = SkColorGetA(palette[solid.color.palette_index]) * + SkColrV1AlphaToFloat(solid.color.alpha); + color = SkColorSetA(palette[solid.color.palette_index], newAlpha); + } + paint->setShader(nullptr); + paint->setColor(color); + return true; + } + case FT_COLR_PAINTFORMAT_LINEAR_GRADIENT: { + const FT_PaintLinearGradient& linearGradient = colrPaint.u.linear_gradient; + std::vector stops; + std::vector colors; + + if (!fetchColorStops(linearGradient.colorline.color_stop_iterator, stops, colors)) { + return false; + } + + if (stops.size() == 1) { + paint->setColor(colors[0]); + return true; + } + + SkPoint linePositions[2] = {SkPoint::Make( SkFixedToScalar(linearGradient.p0.x), + -SkFixedToScalar(linearGradient.p0.y)), + SkPoint::Make( SkFixedToScalar(linearGradient.p1.x), + -SkFixedToScalar(linearGradient.p1.y))}; + SkPoint p0 = linePositions[0]; + SkPoint p1 = linePositions[1]; + SkPoint p2 = SkPoint::Make( SkFixedToScalar(linearGradient.p2.x), + -SkFixedToScalar(linearGradient.p2.y)); + + // If p0p1 or p0p2 are degenerate probably nothing should be drawn. + // If p0p1 and p0p2 are parallel then one side is the first color and the other side is + // the last color, depending on the direction. + // For now, just use the first color. + if (p1 == p0 || p2 == p0 || !SkPoint::CrossProduct(p1 - p0, p2 - p0)) { + paint->setColor(colors[0]); + return true; + } + + // Follow implementation note in nanoemoji: + // https://github.com/googlefonts/nanoemoji/blob/0ac6e7bb4d8202db692574d8530a9b643f1b3b3c/src/nanoemoji/svg.py#L188 + // to compute a new gradient end point P3 as the orthogonal + // projection of the vector from p0 to p1 onto a line perpendicular + // to line p0p2 and passing through p0. + SkVector perpendicularToP2P0 = (p2 - p0); + perpendicularToP2P0 = SkPoint::Make( perpendicularToP2P0.y(), + -perpendicularToP2P0.x()); + SkVector p3 = p0 + SkVectorProjection((p1 - p0), perpendicularToP2P0); + linePositions[1] = p3; + + // Project/scale points according to stop extrema along p0p3 line, + // p3 being the result of the projection above, then scale stops to + // to [0, 1] range so that repeat modes work. The Skia linear + // gradient shader performs the repeat modes over the 0 to 1 range, + // that's why we need to scale the stops to within that range. + SkTileMode tileMode = ToSkTileMode(linearGradient.colorline.extend); + SkScalar colorStopRange = stops.back() - stops.front(); + // If the color stops are all at the same offset position, repeat and reflect modes + // become meaningless. + if (colorStopRange == 0.f) { + if (tileMode != SkTileMode::kClamp) { + paint->setColor(SK_ColorTRANSPARENT); + return true; + } else { + // Insert duplicated fake color stop in pad case at +1.0f to enable the projection + // of circles for an originally 0-length color stop range. Adding this stop will + // paint the equivalent gradient, because: All font specified color stops are in the + // same spot, mode is pad, so everything before this spot is painted with the first + // color, everything after this spot is painted with the last color. Not adding this + // stop will skip the projection and result in specifying non-normalized color stops + // to the shader. + stops.push_back(stops.back() + 1.0f); + colors.push_back(colors.back()); + colorStopRange = 1.0f; + } + } + SkASSERT(colorStopRange != 0.f); + + // If the colorStopRange is 0 at this point, the default behavior of the shader is to + // clamp to 1 color stops that are above 1, clamp to 0 for color stops that are below 0, + // and repeat the outer color stops at 0 and 1 if the color stops are inside the + // range. That will result in the correct rendering. + if ((colorStopRange != 1 || stops.front() != 0.f)) { + SkVector p0p3 = p3 - p0; + SkVector p0Offset = p0p3; + p0Offset.scale(stops.front()); + SkVector p1Offset = p0p3; + p1Offset.scale(stops.back()); + + linePositions[0] = p0 + p0Offset; + linePositions[1] = p0 + p1Offset; + + SkScalar scaleFactor = 1 / colorStopRange; + SkScalar startOffset = stops.front(); + for (SkScalar& stop : stops) { + stop = (stop - startOffset) * scaleFactor; + } + } + + sk_sp shader(SkGradientShader::MakeLinear( + linePositions, + colors.data(), stops.data(), stops.size(), + tileMode)); + SkASSERT(shader); + // An opaque color is needed to ensure the gradient is not modulated by alpha. + paint->setColor(SK_ColorBLACK); + paint->setShader(shader); + return true; + } + case FT_COLR_PAINTFORMAT_RADIAL_GRADIENT: { + const FT_PaintRadialGradient& radialGradient = colrPaint.u.radial_gradient; + SkPoint start = SkPoint::Make( SkFixedToScalar(radialGradient.c0.x), + -SkFixedToScalar(radialGradient.c0.y)); + SkScalar startRadius = SkFixedToScalar(radialGradient.r0); + SkPoint end = SkPoint::Make( SkFixedToScalar(radialGradient.c1.x), + -SkFixedToScalar(radialGradient.c1.y)); + SkScalar endRadius = SkFixedToScalar(radialGradient.r1); + + + std::vector stops; + std::vector colors; + if (!fetchColorStops(radialGradient.colorline.color_stop_iterator, stops, colors)) { + return false; + } + + if (stops.size() == 1) { + paint->setColor(colors[0]); + return true; + } + + SkScalar colorStopRange = stops.back() - stops.front(); + SkTileMode tileMode = ToSkTileMode(radialGradient.colorline.extend); + + if (colorStopRange == 0.f) { + if (tileMode != SkTileMode::kClamp) { + paint->setColor(SK_ColorTRANSPARENT); + return true; + } else { + // Insert duplicated fake color stop in pad case at +1.0f to enable the projection + // of circles for an originally 0-length color stop range. Adding this stop will + // paint the equivalent gradient, because: All font specified color stops are in the + // same spot, mode is pad, so everything before this spot is painted with the first + // color, everything after this spot is painted with the last color. Not adding this + // stop will skip the projection and result in specifying non-normalized color stops + // to the shader. + stops.push_back(stops.back() + 1.0f); + colors.push_back(colors.back()); + colorStopRange = 1.0f; + } + } + SkASSERT(colorStopRange != 0.f); + + // If the colorStopRange is 0 at this point, the default behavior of the shader is to + // clamp to 1 color stops that are above 1, clamp to 0 for color stops that are below 0, + // and repeat the outer color stops at 0 and 1 if the color stops are inside the + // range. That will result in the correct rendering. + if (colorStopRange != 1 || stops.front() != 0.f) { + // For the Skia two-point caonical shader to understand the + // COLRv1 color stops we need to scale stops to 0 to 1 range and + // interpolate new centers and radii. Otherwise the shader + // clamps stops outside the range to 0 and 1 (larger interval) + // or repeats the outer stops at 0 and 1 if the (smaller + // interval). + SkVector startToEnd = end - start; + SkScalar radiusDiff = endRadius - startRadius; + SkScalar scaleFactor = 1 / colorStopRange; + SkScalar stopsStartOffset = stops.front(); + + SkVector startOffset = startToEnd; + startOffset.scale(stops.front()); + SkVector endOffset = startToEnd; + endOffset.scale(stops.back()); + + // The order of the following computations is important in order to avoid + // overwriting start or startRadius before the second reassignment. + end = start + endOffset; + start = start + startOffset; + endRadius = startRadius + radiusDiff * stops.back(); + startRadius = startRadius + radiusDiff * stops.front(); + + for (auto& stop : stops) { + stop = (stop - stopsStartOffset) * scaleFactor; + } + } + + // For negative radii, interpolation is needed to prepare parameters suitable + // for invoking the shader. Implementation below as resolution discussed in + // https://github.com/googlefonts/colr-gradients-spec/issues/367. + // Truncate to manually interpolated color for tile mode clamp, otherwise + // calculate positive projected circles. + if (startRadius < 0 || endRadius < 0) { + if (startRadius == endRadius && startRadius < 0) { + paint->setColor(SK_ColorTRANSPARENT); + return true; + } + + if (tileMode == SkTileMode::kClamp) { + SkVector startToEnd = end - start; + SkScalar radiusDiff = endRadius - startRadius; + SkScalar zeroRadiusStop = 0.f; + TruncateStops truncateSide = TruncateStart; + if (startRadius < 0) { + truncateSide = TruncateStart; + + // Compute color stop position where radius is = 0. After the scaling + // of stop positions to the normal 0,1 range that we have done above, + // the size of the radius as a function of the color stops is: r(x) = r0 + // + x*(r1-r0) Solving this function for r(x) = 0, we get: x = -r0 / + // (r1-r0) + zeroRadiusStop = -startRadius / (endRadius - startRadius); + startRadius = 0.f; + SkVector startEndDiff = end - start; + startEndDiff.scale(zeroRadiusStop); + start = start + startEndDiff; + } + + if (endRadius < 0) { + truncateSide = TruncateEnd; + zeroRadiusStop = -startRadius / (endRadius - startRadius); + endRadius = 0.f; + SkVector startEndDiff = end - start; + startEndDiff.scale(1 - zeroRadiusStop); + end = end - startEndDiff; + } + + if (!(startRadius == 0 && endRadius == 0)) { + truncateToStopInterpolating( + zeroRadiusStop, colors, stops, truncateSide); + } else { + // If both radii have become negative and where clamped to 0, we need to + // produce a single color cone, otherwise the shader colors the whole + // plane in a single color when two radii are specified as 0. + if (radiusDiff > 0) { + end = start + startToEnd; + endRadius = radiusDiff; + colors.erase(colors.begin(), colors.end() - 1); + stops.erase(stops.begin(), stops.end() - 1); + } else { + start -= startToEnd; + startRadius = -radiusDiff; + colors.erase(colors.begin() + 1, colors.end()); + stops.erase(stops.begin() + 1, stops.end()); + } + } + } else { + if (startRadius < 0 || endRadius < 0) { + auto roundIntegerMultiple = [](SkScalar factorZeroCrossing, + SkTileMode tileMode) { + int roundedMultiple = factorZeroCrossing > 0 + ? ceilf(factorZeroCrossing) + : floorf(factorZeroCrossing) - 1; + if (tileMode == SkTileMode::kMirror && roundedMultiple % 2 != 0) { + roundedMultiple += roundedMultiple < 0 ? -1 : 1; + } + return roundedMultiple; + }; + + SkVector startToEnd = end - start; + SkScalar radiusDiff = endRadius - startRadius; + SkScalar factorZeroCrossing = (startRadius / (startRadius - endRadius)); + bool inRange = 0.f <= factorZeroCrossing && factorZeroCrossing <= 1.0f; + SkScalar direction = inRange && radiusDiff < 0 ? -1.0f : 1.0f; + SkScalar circleProjectionFactor = + roundIntegerMultiple(factorZeroCrossing * direction, tileMode); + startToEnd.scale(circleProjectionFactor); + startRadius += circleProjectionFactor * radiusDiff; + endRadius += circleProjectionFactor * radiusDiff; + start += startToEnd; + end += startToEnd; + } + } + } + + // An opaque color is needed to ensure the gradient is not modulated by alpha. + paint->setColor(SK_ColorBLACK); + + paint->setShader(SkGradientShader::MakeTwoPointConical( + start, startRadius, end, endRadius, colors.data(), stops.data(), stops.size(), + tileMode)); + return true; + } + case FT_COLR_PAINTFORMAT_SWEEP_GRADIENT: { + const FT_PaintSweepGradient& sweepGradient = colrPaint.u.sweep_gradient; + SkPoint center = SkPoint::Make( SkFixedToScalar(sweepGradient.center.x), + -SkFixedToScalar(sweepGradient.center.y)); + + + SkScalar startAngle = SkFixedToScalar(sweepGradient.start_angle * 180.0f); + SkScalar endAngle = SkFixedToScalar(sweepGradient.end_angle * 180.0f); + // OpenType 1.9.1 adds a shift to the angle to ease specification of a 0 to 360 + // degree sweep. + startAngle += 180.0f; + endAngle += 180.0f; + + std::vector stops; + std::vector colors; + if (!fetchColorStops(sweepGradient.colorline.color_stop_iterator, stops, colors)) { + return false; + } + + if (stops.size() == 1) { + paint->setColor(colors[0]); + return true; + } + + // An opaque color is needed to ensure the gradient is not modulated by alpha. + paint->setColor(SK_ColorBLACK); + + // New (Var)SweepGradient implementation compliant with OpenType 1.9.1 from here. + + // The shader expects stops from 0 to 1, so we need to account for + // minimum and maximum stop positions being different from 0 and + // 1. We do that by scaling minimum and maximum stop positions to + // the 0 to 1 interval and scaling the angles inverse proportionally. + + // 1) Scale angles to their equivalent positions if stops were from 0 to 1. + + SkScalar sectorAngle = endAngle - startAngle; + SkTileMode tileMode = ToSkTileMode(sweepGradient.colorline.extend); + if (sectorAngle == 0 && tileMode != SkTileMode::kClamp) { + // "If the ColorLine's extend mode is reflect or repeat and start and end angle + // are equal, nothing is drawn.". + paint->setColor(SK_ColorTRANSPARENT); + return true; + } + + + SkScalar startAngleScaled = startAngle + sectorAngle * stops.front(); + SkScalar endAngleScaled = startAngle + sectorAngle * stops.back(); + + // 2) Scale stops accordingly to 0 to 1 range. + + float colorStopRange = stops.back() - stops.front(); + bool colorStopInserted = false; + if (colorStopRange == 0.f) { + if (tileMode != SkTileMode::kClamp) { + paint->setColor(SK_ColorTRANSPARENT); + return true; + } else { + // Insert duplicated fake color stop in pad case at +1.0f to feed the shader correct + // values and enable painting a pad sweep gradient with two colors. Adding this stop + // will paint the equivalent gradient, because: All font specified color stops are + // in the same spot, mode is pad, so everything before this spot is painted with the + // first color, everything after this spot is painted with the last color. Not + // adding this stop will skip the projection and result in specifying non-normalized + // color stops to the shader. + stops.push_back(stops.back() + 1.0f); + colors.push_back(colors.back()); + colorStopRange = 1.0f; + colorStopInserted = true; + } + } + + SkScalar scaleFactor = 1 / colorStopRange; + SkScalar startOffset = stops.front(); + + for (SkScalar& stop : stops) { + stop = (stop - startOffset) * scaleFactor; + } + + /* https://docs.microsoft.com/en-us/typography/opentype/spec/colr#sweep-gradients + * "The angles are expressed in counter-clockwise degrees from + * the direction of the positive x-axis on the design + * grid. [...] The color line progresses from the start angle + * to the end angle in the counter-clockwise direction;" - + * Convert angles and stops from counter-clockwise to clockwise + * for the shader if the gradient is not already reversed due to + * start angle being larger than end angle. */ + startAngleScaled = 360.f - startAngleScaled; + endAngleScaled = 360.f - endAngleScaled; + if (startAngleScaled > endAngleScaled || + (startAngleScaled == endAngleScaled && !colorStopInserted)) { + std::swap(startAngleScaled, endAngleScaled); + std::reverse(stops.begin(), stops.end()); + std::reverse(colors.begin(), colors.end()); + for (auto& stop : stops) { + stop = 1.0f - stop; + } + } + + paint->setShader(SkGradientShader::MakeSweep(center.x(), center.y(), + colors.data(), + stops.data(), stops.size(), + tileMode, + startAngleScaled, + endAngleScaled, + 0, nullptr)); + return true; + } + default: { + SkASSERT(false); + return false; + } + } + SkUNREACHABLE; +} + +bool colrv1_draw_paint(SkCanvas* canvas, + const SkSpan& palette, + const SkColor foregroundColor, + FT_Face face, + const FT_COLR_Paint& colrPaint) { + switch (colrPaint.format) { + case FT_COLR_PAINTFORMAT_GLYPH: { + FT_UInt glyphID = colrPaint.u.glyph.glyphID; + SkPath path; + /* TODO: Currently this call retrieves the path at units_per_em size. If we want to get + * correct hinting for the scaled size under the transforms at this point in the color + * glyph graph, we need to extract at least the requested glyph width and height and + * pass that to the path generation. */ + if (!generateFacePathCOLRv1(face, glyphID, &path)) { + return false; + } + if constexpr (kSkShowTextBlitCoverage) { + SkPaint highlight_paint; + highlight_paint.setColor(0x33FF0000); + canvas->drawRect(path.getBounds(), highlight_paint); + } + canvas->clipPath(path, true /* doAntiAlias */); + return true; + } + case FT_COLR_PAINTFORMAT_SOLID: + case FT_COLR_PAINTFORMAT_LINEAR_GRADIENT: + case FT_COLR_PAINTFORMAT_RADIAL_GRADIENT: + case FT_COLR_PAINTFORMAT_SWEEP_GRADIENT: { + SkPaint skPaint; + if (!colrv1_configure_skpaint(face, palette, foregroundColor, colrPaint, &skPaint)) { + return false; + } + canvas->drawPaint(skPaint); + return true; + } + case FT_COLR_PAINTFORMAT_TRANSFORM: + case FT_COLR_PAINTFORMAT_TRANSLATE: + case FT_COLR_PAINTFORMAT_SCALE: + case FT_COLR_PAINTFORMAT_ROTATE: + case FT_COLR_PAINTFORMAT_SKEW: + [[fallthrough]]; // Transforms handled in colrv1_transform. + default: + SkASSERT(false); + return false; + } + SkUNREACHABLE; +} + +bool colrv1_draw_glyph_with_path(SkCanvas* canvas, + const SkSpan& palette, SkColor foregroundColor, + FT_Face face, + const FT_COLR_Paint& glyphPaint, const FT_COLR_Paint& fillPaint) { + SkASSERT(glyphPaint.format == FT_COLR_PAINTFORMAT_GLYPH); + SkASSERT(fillPaint.format == FT_COLR_PAINTFORMAT_SOLID || + fillPaint.format == FT_COLR_PAINTFORMAT_LINEAR_GRADIENT || + fillPaint.format == FT_COLR_PAINTFORMAT_RADIAL_GRADIENT || + fillPaint.format == FT_COLR_PAINTFORMAT_SWEEP_GRADIENT); + + SkPaint skiaFillPaint; + skiaFillPaint.setAntiAlias(true); + if (!colrv1_configure_skpaint(face, palette, foregroundColor, fillPaint, &skiaFillPaint)) { + return false; + } + + FT_UInt glyphID = glyphPaint.u.glyph.glyphID; + SkPath path; + /* TODO: Currently this call retrieves the path at units_per_em size. If we want to get + * correct hinting for the scaled size under the transforms at this point in the color + * glyph graph, we need to extract at least the requested glyph width and height and + * pass that to the path generation. */ + if (!generateFacePathCOLRv1(face, glyphID, &path)) { + return false; + } + if constexpr (kSkShowTextBlitCoverage) { + SkPaint highlightPaint; + highlightPaint.setColor(0x33FF0000); + canvas->drawRect(path.getBounds(), highlightPaint); + } + canvas->drawPath(path, skiaFillPaint); + return true; +} + + +/* In drawing mode, concatenates the transforms directly on SkCanvas. In + * bounding box calculation mode, no SkCanvas is specified, but we only want to + * retrieve the transform from the FreeType paint object. */ +void colrv1_transform(FT_Face face, + const FT_COLR_Paint& colrPaint, + SkCanvas* canvas, + SkMatrix* outTransform = nullptr) { + SkMatrix transform; + + SkASSERT(canvas || outTransform); + + switch (colrPaint.format) { + case FT_COLR_PAINTFORMAT_TRANSFORM: { + transform = ToSkMatrix(colrPaint.u.transform.affine); + break; + } + case FT_COLR_PAINTFORMAT_TRANSLATE: { + transform = SkMatrix::Translate( SkFixedToScalar(colrPaint.u.translate.dx), + -SkFixedToScalar(colrPaint.u.translate.dy)); + break; + } + case FT_COLR_PAINTFORMAT_SCALE: { + transform.setScale( SkFixedToScalar(colrPaint.u.scale.scale_x), + SkFixedToScalar(colrPaint.u.scale.scale_y), + SkFixedToScalar(colrPaint.u.scale.center_x), + -SkFixedToScalar(colrPaint.u.scale.center_y)); + break; + } + case FT_COLR_PAINTFORMAT_ROTATE: { + // COLRv1 angles are counter-clockwise, compare + // https://docs.microsoft.com/en-us/typography/opentype/spec/colr#formats-24-to-27-paintrotate-paintvarrotate-paintrotatearoundcenter-paintvarrotatearoundcenter + transform = SkMatrix::RotateDeg( + -SkFixedToScalar(colrPaint.u.rotate.angle) * 180.0f, + SkPoint::Make( SkFixedToScalar(colrPaint.u.rotate.center_x), + -SkFixedToScalar(colrPaint.u.rotate.center_y))); + break; + } + case FT_COLR_PAINTFORMAT_SKEW: { + // In the PAINTFORMAT_ROTATE implementation, SkMatrix setRotate + // snaps to 0 for values very close to 0. Do the same here. + + SkScalar xDeg = SkFixedToScalar(colrPaint.u.skew.x_skew_angle) * 180.0f; + SkScalar xRad = SkDegreesToRadians(xDeg); + SkScalar xTan = SkScalarTan(xRad); + xTan = SkScalarNearlyZero(xTan) ? 0.0f : xTan; + + SkScalar yDeg = SkFixedToScalar(colrPaint.u.skew.y_skew_angle) * 180.0f; + // Negate y_skew_angle due to Skia's y-down coordinate system to achieve + // counter-clockwise skew along the y-axis. + SkScalar yRad = SkDegreesToRadians(-yDeg); + SkScalar yTan = SkScalarTan(yRad); + yTan = SkScalarNearlyZero(yTan) ? 0.0f : yTan; + + transform.setSkew(xTan, yTan, + SkFixedToScalar(colrPaint.u.skew.center_x), + -SkFixedToScalar(colrPaint.u.skew.center_y)); + break; + } + default: { + SkASSERT(false); // Only transforms are handled in this function. + } + } + if (canvas) { + canvas->concat(transform); + } + if (outTransform) { + *outTransform = transform; + } +} + +bool colrv1_start_glyph(SkCanvas* canvas, + const SkSpan& palette, + const SkColor foregroundColor, + FT_Face face, + uint16_t glyphId, + FT_Color_Root_Transform rootTransform, + VisitedSet* activePaints); + +bool colrv1_traverse_paint(SkCanvas* canvas, + const SkSpan& palette, + const SkColor foregroundColor, + FT_Face face, + FT_OpaquePaint opaquePaint, + VisitedSet* activePaints) { + // Cycle detection, see section "5.7.11.1.9 Color glyphs as a directed acyclic graph". + if (activePaints->contains(opaquePaint)) { + return false; + } + + activePaints->add(opaquePaint); + SK_AT_SCOPE_EXIT(activePaints->remove(opaquePaint)); + + FT_COLR_Paint paint; + if (!FT_Get_Paint(face, opaquePaint, &paint)) { + return false; + } + + SkAutoCanvasRestore autoRestore(canvas, true /* doSave */); + switch (paint.format) { + case FT_COLR_PAINTFORMAT_COLR_LAYERS: { + FT_LayerIterator& layerIterator = paint.u.colr_layers.layer_iterator; + FT_OpaquePaint layerPaint{nullptr, 1}; + while (FT_Get_Paint_Layers(face, &layerIterator, &layerPaint)) { + if (!colrv1_traverse_paint(canvas, palette, foregroundColor, face, + layerPaint, activePaints)) { + return false; + } + } + return true; + } + case FT_COLR_PAINTFORMAT_GLYPH: + // Special case paint graph leaf situations to improve + // performance. These are situations in the graph where a GlyphPaint + // is followed by either a solid or a gradient fill. Here we can use + // drawPath() + SkPaint directly which is faster than setting a + // clipPath() followed by a drawPaint(). + FT_COLR_Paint fillPaint; + if (!FT_Get_Paint(face, paint.u.glyph.paint, &fillPaint)) { + return false; + } + if (fillPaint.format == FT_COLR_PAINTFORMAT_SOLID || + fillPaint.format == FT_COLR_PAINTFORMAT_LINEAR_GRADIENT || + fillPaint.format == FT_COLR_PAINTFORMAT_RADIAL_GRADIENT || + fillPaint.format == FT_COLR_PAINTFORMAT_SWEEP_GRADIENT) + { + return colrv1_draw_glyph_with_path(canvas, palette, foregroundColor, + face, paint, fillPaint); + } + if (!colrv1_draw_paint(canvas, palette, foregroundColor, face, paint)) { + return false; + } + return colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.glyph.paint, activePaints); + case FT_COLR_PAINTFORMAT_COLR_GLYPH: + return colrv1_start_glyph(canvas, palette, foregroundColor, + face, paint.u.colr_glyph.glyphID, FT_COLOR_NO_ROOT_TRANSFORM, + activePaints); + case FT_COLR_PAINTFORMAT_TRANSFORM: + colrv1_transform(face, paint, canvas); + return colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.transform.paint, activePaints); + case FT_COLR_PAINTFORMAT_TRANSLATE: + colrv1_transform(face, paint, canvas); + return colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.translate.paint, activePaints); + case FT_COLR_PAINTFORMAT_SCALE: + colrv1_transform(face, paint, canvas); + return colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.scale.paint, activePaints); + case FT_COLR_PAINTFORMAT_ROTATE: + colrv1_transform(face, paint, canvas); + return colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.rotate.paint, activePaints); + case FT_COLR_PAINTFORMAT_SKEW: + colrv1_transform(face, paint, canvas); + return colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.skew.paint, activePaints); + case FT_COLR_PAINTFORMAT_COMPOSITE: { + SkAutoCanvasRestore acr(canvas, false); + canvas->saveLayer(nullptr, nullptr); + if (!colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.composite.backdrop_paint, activePaints)) { + return false; + } + SkPaint blendModePaint; + blendModePaint.setBlendMode(ToSkBlendMode(paint.u.composite.composite_mode)); + canvas->saveLayer(nullptr, &blendModePaint); + return colrv1_traverse_paint(canvas, palette, foregroundColor, + face, paint.u.composite.source_paint, activePaints); + } + case FT_COLR_PAINTFORMAT_SOLID: + case FT_COLR_PAINTFORMAT_LINEAR_GRADIENT: + case FT_COLR_PAINTFORMAT_RADIAL_GRADIENT: + case FT_COLR_PAINTFORMAT_SWEEP_GRADIENT: { + return colrv1_draw_paint(canvas, palette, foregroundColor, face, paint); + } + default: + SkASSERT(false); + return false; + } + SkUNREACHABLE; +} + +SkPath GetClipBoxPath(FT_Face face, uint16_t glyphId, bool untransformed) { + SkPath resultPath; + SkUniqueFTSize unscaledFtSize = nullptr; + FT_Size oldSize = face->size; + FT_Matrix oldTransform; + FT_Vector oldDelta; + FT_Error err = 0; + + if (untransformed) { + unscaledFtSize.reset( + [face]() -> FT_Size { + FT_Size size; + FT_Error err = FT_New_Size(face, &size); + if (err != 0) { + SK_TRACEFTR(err, + "FT_New_Size(%s) failed in generateFacePathStaticCOLRv1.", + face->family_name); + return nullptr; + } + return size; + }()); + if (!unscaledFtSize) { + return resultPath; + } + + err = FT_Activate_Size(unscaledFtSize.get()); + if (err != 0) { + return resultPath; + } + + err = FT_Set_Char_Size(face, SkIntToFDot6(face->units_per_EM), 0, 0, 0); + if (err != 0) { + return resultPath; + } + + FT_Get_Transform(face, &oldTransform, &oldDelta); + FT_Set_Transform(face, nullptr, nullptr); + } + + FT_ClipBox colrGlyphClipBox; + if (FT_Get_Color_Glyph_ClipBox(face, glyphId, &colrGlyphClipBox)) { + resultPath = SkPath::Polygon({{ SkFDot6ToScalar(colrGlyphClipBox.bottom_left.x), + -SkFDot6ToScalar(colrGlyphClipBox.bottom_left.y)}, + { SkFDot6ToScalar(colrGlyphClipBox.top_left.x), + -SkFDot6ToScalar(colrGlyphClipBox.top_left.y)}, + { SkFDot6ToScalar(colrGlyphClipBox.top_right.x), + -SkFDot6ToScalar(colrGlyphClipBox.top_right.y)}, + { SkFDot6ToScalar(colrGlyphClipBox.bottom_right.x), + -SkFDot6ToScalar(colrGlyphClipBox.bottom_right.y)}}, + true); + } + + if (untransformed) { + err = FT_Activate_Size(oldSize); + if (err != 0) { + return resultPath; + } + FT_Set_Transform(face, &oldTransform, &oldDelta); + } + + return resultPath; +} + +bool colrv1_start_glyph(SkCanvas* canvas, + const SkSpan& palette, + const SkColor foregroundColor, + FT_Face face, + uint16_t glyphId, + FT_Color_Root_Transform rootTransform, + VisitedSet* activePaints) { + FT_OpaquePaint opaquePaint{nullptr, 1}; + if (!FT_Get_Color_Glyph_Paint(face, glyphId, rootTransform, &opaquePaint)) { + return false; + } + + bool untransformed = rootTransform == FT_COLOR_NO_ROOT_TRANSFORM; + SkPath clipBoxPath = GetClipBoxPath(face, glyphId, untransformed); + if (!clipBoxPath.isEmpty()) { + canvas->clipPath(clipBoxPath, true); + } + + if (!colrv1_traverse_paint(canvas, palette, foregroundColor, + face, opaquePaint, activePaints)) { + return false; + } + + return true; +} + +bool colrv1_start_glyph_bounds(SkMatrix *ctm, + SkRect* bounds, + FT_Face face, + uint16_t glyphId, + FT_Color_Root_Transform rootTransform, + VisitedSet* activePaints); + +bool colrv1_traverse_paint_bounds(SkMatrix* ctm, + SkRect* bounds, + FT_Face face, + FT_OpaquePaint opaquePaint, + VisitedSet* activePaints) { + // Cycle detection, see section "5.7.11.1.9 Color glyphs as a directed acyclic graph". + if (activePaints->contains(opaquePaint)) { + return false; + } + + activePaints->add(opaquePaint); + SK_AT_SCOPE_EXIT(activePaints->remove(opaquePaint)); + + FT_COLR_Paint paint; + if (!FT_Get_Paint(face, opaquePaint, &paint)) { + return false; + } + + SkMatrix restoreMatrix = *ctm; + SK_AT_SCOPE_EXIT(*ctm = restoreMatrix); + + switch (paint.format) { + case FT_COLR_PAINTFORMAT_COLR_LAYERS: { + FT_LayerIterator& layerIterator = paint.u.colr_layers.layer_iterator; + FT_OpaquePaint layerPaint{nullptr, 1}; + while (FT_Get_Paint_Layers(face, &layerIterator, &layerPaint)) { + if (!colrv1_traverse_paint_bounds(ctm, bounds, face, layerPaint, activePaints)) { + return false; + } + } + return true; + } + case FT_COLR_PAINTFORMAT_GLYPH: { + FT_UInt glyphID = paint.u.glyph.glyphID; + SkPath path; + if (!generateFacePathCOLRv1(face, glyphID, &path)) { + return false; + } + path.transform(*ctm); + bounds->join(path.getBounds()); + return true; + } + case FT_COLR_PAINTFORMAT_COLR_GLYPH: { + FT_UInt glyphID = paint.u.colr_glyph.glyphID; + return colrv1_start_glyph_bounds(ctm, bounds, face, glyphID, FT_COLOR_NO_ROOT_TRANSFORM, + activePaints); + } + case FT_COLR_PAINTFORMAT_TRANSFORM: { + SkMatrix transformMatrix; + colrv1_transform(face, paint, nullptr, &transformMatrix); + ctm->preConcat(transformMatrix); + FT_OpaquePaint& transformPaint = paint.u.transform.paint; + return colrv1_traverse_paint_bounds(ctm, bounds, face, transformPaint, activePaints); + } + case FT_COLR_PAINTFORMAT_TRANSLATE: { + SkMatrix transformMatrix; + colrv1_transform(face, paint, nullptr, &transformMatrix); + ctm->preConcat(transformMatrix); + FT_OpaquePaint& translatePaint = paint.u.translate.paint; + return colrv1_traverse_paint_bounds(ctm, bounds, face, translatePaint, activePaints); + } + case FT_COLR_PAINTFORMAT_SCALE: { + SkMatrix transformMatrix; + colrv1_transform(face, paint, nullptr, &transformMatrix); + ctm->preConcat(transformMatrix); + FT_OpaquePaint& scalePaint = paint.u.scale.paint; + return colrv1_traverse_paint_bounds(ctm, bounds, face, scalePaint, activePaints); + } + case FT_COLR_PAINTFORMAT_ROTATE: { + SkMatrix transformMatrix; + colrv1_transform(face, paint, nullptr, &transformMatrix); + ctm->preConcat(transformMatrix); + FT_OpaquePaint& rotatePaint = paint.u.rotate.paint; + return colrv1_traverse_paint_bounds(ctm, bounds, face, rotatePaint, activePaints); + } + case FT_COLR_PAINTFORMAT_SKEW: { + SkMatrix transformMatrix; + colrv1_transform(face, paint, nullptr, &transformMatrix); + ctm->preConcat(transformMatrix); + FT_OpaquePaint& skewPaint = paint.u.skew.paint; + return colrv1_traverse_paint_bounds(ctm, bounds, face, skewPaint, activePaints); + } + case FT_COLR_PAINTFORMAT_COMPOSITE: { + FT_OpaquePaint& backdropPaint = paint.u.composite.backdrop_paint; + FT_OpaquePaint& sourcePaint = paint.u.composite. source_paint; + return colrv1_traverse_paint_bounds(ctm, bounds, face, backdropPaint, activePaints) && + colrv1_traverse_paint_bounds(ctm, bounds, face, sourcePaint, activePaints); + } + case FT_COLR_PAINTFORMAT_SOLID: + case FT_COLR_PAINTFORMAT_LINEAR_GRADIENT: + case FT_COLR_PAINTFORMAT_RADIAL_GRADIENT: + case FT_COLR_PAINTFORMAT_SWEEP_GRADIENT: { + return true; + } + default: + SkASSERT(false); + return false; + } + SkUNREACHABLE; +} + + +bool colrv1_start_glyph_bounds(SkMatrix *ctm, + SkRect* bounds, + FT_Face face, + uint16_t glyphId, + FT_Color_Root_Transform rootTransform, + VisitedSet* activePaints) { + FT_OpaquePaint opaquePaint{nullptr, 1}; + return FT_Get_Color_Glyph_Paint(face, glyphId, rootTransform, &opaquePaint) && + colrv1_traverse_paint_bounds(ctm, bounds, face, opaquePaint, activePaints); +} +#endif // TT_SUPPORT_COLRV1 + +} // namespace + + +#ifdef TT_SUPPORT_COLRV1 +bool SkScalerContext_FreeType_Base::drawCOLRv1Glyph(FT_Face face, + const SkGlyph& glyph, + uint32_t loadGlyphFlags, + SkSpan palette, + SkCanvas* canvas) { + if (this->isSubpixel()) { + canvas->translate(SkFixedToScalar(glyph.getSubXFixed()), + SkFixedToScalar(glyph.getSubYFixed())); + } + + VisitedSet activePaints; + bool haveLayers = colrv1_start_glyph(canvas, palette, + fRec.fForegroundColor, + face, glyph.getGlyphID(), + FT_COLOR_INCLUDE_ROOT_TRANSFORM, + &activePaints); + SkASSERTF(haveLayers, "Could not get COLRv1 layers from '%s'.", face->family_name); + return haveLayers; +} +#endif // TT_SUPPORT_COLRV1 + +#ifdef FT_COLOR_H +bool SkScalerContext_FreeType_Base::drawCOLRv0Glyph(FT_Face face, + const SkGlyph& glyph, + uint32_t loadGlyphFlags, + SkSpan palette, + SkCanvas* canvas) { + if (this->isSubpixel()) { + canvas->translate(SkFixedToScalar(glyph.getSubXFixed()), + SkFixedToScalar(glyph.getSubYFixed())); + } + + bool haveLayers = false; + FT_LayerIterator layerIterator; + layerIterator.p = nullptr; + FT_UInt layerGlyphIndex = 0; + FT_UInt layerColorIndex = 0; + SkPaint paint; + paint.setAntiAlias(!(loadGlyphFlags & FT_LOAD_TARGET_MONO)); + while (FT_Get_Color_Glyph_Layer(face, glyph.getGlyphID(), &layerGlyphIndex, + &layerColorIndex, &layerIterator)) { + haveLayers = true; + if (layerColorIndex == 0xFFFF) { + paint.setColor(fRec.fForegroundColor); + } else { + paint.setColor(palette[layerColorIndex]); + } + SkPath path; + if (this->generateFacePath(face, layerGlyphIndex, loadGlyphFlags, &path)) { + canvas->drawPath(path, paint); + } + } + SkASSERTF(haveLayers, "Could not get COLRv0 layers from '%s'.", face->family_name); + return haveLayers; +} +#endif // FT_COLOR_H + +#if defined(FT_CONFIG_OPTION_SVG) +bool SkScalerContext_FreeType_Base::drawSVGGlyph(FT_Face face, + const SkGlyph& glyph, + uint32_t loadGlyphFlags, + SkSpan palette, + SkCanvas* canvas) { + SkASSERT(face->glyph->format == FT_GLYPH_FORMAT_SVG); + + FT_SVG_Document ftSvg = (FT_SVG_Document)face->glyph->other; + SkMatrix m; + FT_Matrix ftMatrix = ftSvg->transform; + FT_Vector ftOffset = ftSvg->delta; + m.setAll( + SkFixedToFloat(ftMatrix.xx), -SkFixedToFloat(ftMatrix.xy), SkFixedToFloat(ftOffset.x), + -SkFixedToFloat(ftMatrix.yx), SkFixedToFloat(ftMatrix.yy), -SkFixedToFloat(ftOffset.y), + 0 , 0 , 1 ); + m.postScale(SkFixedToFloat(ftSvg->metrics.x_scale) / 64.0f, + SkFixedToFloat(ftSvg->metrics.y_scale) / 64.0f); + if (this->isSubpixel()) { + m.postTranslate(SkFixedToScalar(glyph.getSubXFixed()), + SkFixedToScalar(glyph.getSubYFixed())); + } + canvas->concat(m); + + SkGraphics::OpenTypeSVGDecoderFactory svgFactory = SkGraphics::GetOpenTypeSVGDecoderFactory(); + if (!svgFactory) { + return false; + } + auto svgDecoder = svgFactory(ftSvg->svg_document, ftSvg->svg_document_length); + if (!svgDecoder) { + return false; + } + return svgDecoder->render(*canvas, ftSvg->units_per_EM, glyph.getGlyphID(), + fRec.fForegroundColor, palette); +} +#endif // FT_CONFIG_OPTION_SVG + +void SkScalerContext_FreeType_Base::generateGlyphImage(FT_Face face, + const SkGlyph& glyph, + const SkMatrix& bitmapTransform) +{ + switch ( face->glyph->format ) { + case FT_GLYPH_FORMAT_OUTLINE: { + FT_Outline* outline = &face->glyph->outline; + + int dx = 0, dy = 0; + if (this->isSubpixel()) { + dx = SkFixedToFDot6(glyph.getSubXFixed()); + dy = SkFixedToFDot6(glyph.getSubYFixed()); + // negate dy since freetype-y-goes-up and skia-y-goes-down + dy = -dy; + } + + memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight); + + if (SkMask::kLCD16_Format == glyph.fMaskFormat) { + const bool doBGR = SkToBool(fRec.fFlags & SkScalerContext::kLCD_BGROrder_Flag); + const bool doVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); + + FT_Outline_Translate(outline, dx, dy); + FT_Error err = FT_Render_Glyph(face->glyph, doVert ? FT_RENDER_MODE_LCD_V : + FT_RENDER_MODE_LCD); + if (err) { + SK_TRACEFTR(err, "Could not render glyph %p.", face->glyph); + return; + } + + SkMask mask = glyph.mask(); + if constexpr (kSkShowTextBlitCoverage) { + memset(mask.fImage, 0x80, mask.fBounds.height() * mask.fRowBytes); + } + FT_GlyphSlotRec& ftGlyph = *face->glyph; + + if (!SkIRect::Intersects(mask.fBounds, + SkIRect::MakeXYWH( ftGlyph.bitmap_left, + -ftGlyph.bitmap_top, + ftGlyph.bitmap.width, + ftGlyph.bitmap.rows))) + { + return; + } + + // If the FT_Bitmap extent is larger, discard bits of the bitmap outside the mask. + // If the SkMask extent is larger, shrink mask to fit bitmap (clearing discarded). + unsigned char* origBuffer = ftGlyph.bitmap.buffer; + // First align the top left (origin). + if (-ftGlyph.bitmap_top < mask.fBounds.fTop) { + int32_t topDiff = mask.fBounds.fTop - (-ftGlyph.bitmap_top); + ftGlyph.bitmap.buffer += ftGlyph.bitmap.pitch * topDiff; + ftGlyph.bitmap.rows -= topDiff; + ftGlyph.bitmap_top = -mask.fBounds.fTop; + } + if (ftGlyph.bitmap_left < mask.fBounds.fLeft) { + int32_t leftDiff = mask.fBounds.fLeft - ftGlyph.bitmap_left; + ftGlyph.bitmap.buffer += leftDiff; + ftGlyph.bitmap.width -= leftDiff; + ftGlyph.bitmap_left = mask.fBounds.fLeft; + } + if (mask.fBounds.fTop < -ftGlyph.bitmap_top) { + mask.fImage += mask.fRowBytes * (-ftGlyph.bitmap_top - mask.fBounds.fTop); + mask.fBounds.fTop = -ftGlyph.bitmap_top; + } + if (mask.fBounds.fLeft < ftGlyph.bitmap_left) { + mask.fImage += sizeof(uint16_t) * (ftGlyph.bitmap_left - mask.fBounds.fLeft); + mask.fBounds.fLeft = ftGlyph.bitmap_left; + } + // Origins aligned, clean up the width and height. + int ftVertScale = (doVert ? 3 : 1); + int ftHoriScale = (doVert ? 1 : 3); + if (mask.fBounds.height() * ftVertScale < SkToInt(ftGlyph.bitmap.rows)) { + ftGlyph.bitmap.rows = mask.fBounds.height() * ftVertScale; + } + if (mask.fBounds.width() * ftHoriScale < SkToInt(ftGlyph.bitmap.width)) { + ftGlyph.bitmap.width = mask.fBounds.width() * ftHoriScale; + } + if (SkToInt(ftGlyph.bitmap.rows) < mask.fBounds.height() * ftVertScale) { + mask.fBounds.fBottom = mask.fBounds.fTop + ftGlyph.bitmap.rows / ftVertScale; + } + if (SkToInt(ftGlyph.bitmap.width) < mask.fBounds.width() * ftHoriScale) { + mask.fBounds.fRight = mask.fBounds.fLeft + ftGlyph.bitmap.width / ftHoriScale; + } + if (fPreBlend.isApplicable()) { + copyFT2LCD16(ftGlyph.bitmap, mask, doBGR, + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); + } else { + copyFT2LCD16(ftGlyph.bitmap, mask, doBGR, + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); + } + // Restore the buffer pointer so FreeType can properly free it. + ftGlyph.bitmap.buffer = origBuffer; + } else { + FT_BBox bbox; + FT_Bitmap target; + FT_Outline_Get_CBox(outline, &bbox); + /* + what we really want to do for subpixel is + offset(dx, dy) + compute_bounds + offset(bbox & !63) + but that is two calls to offset, so we do the following, which + achieves the same thing with only one offset call. + */ + FT_Outline_Translate(outline, dx - ((bbox.xMin + dx) & ~63), + dy - ((bbox.yMin + dy) & ~63)); + + target.width = glyph.fWidth; + target.rows = glyph.fHeight; + target.pitch = glyph.rowBytes(); + target.buffer = reinterpret_cast(glyph.fImage); + target.pixel_mode = compute_pixel_mode(glyph.fMaskFormat); + target.num_grays = 256; + + FT_Outline_Get_Bitmap(face->glyph->library, outline, &target); + if constexpr (kSkShowTextBlitCoverage) { + if (glyph.fMaskFormat == SkMask::kBW_Format) { + for (unsigned y = 0; y < target.rows; y += 2) { + for (unsigned x = (y & 0x2); x < target.width; x+=4) { + uint8_t& b = target.buffer[(target.pitch * y) + (x >> 3)]; + b = b ^ (1 << (0x7 - (x & 0x7))); + } + } + } else { + for (unsigned y = 0; y < target.rows; ++y) { + for (unsigned x = 0; x < target.width; ++x) { + uint8_t& a = target.buffer[(target.pitch * y) + x]; + a = std::max(a, 0x20); + } + } + } + } + } + } break; + + case FT_GLYPH_FORMAT_BITMAP: { + FT_Pixel_Mode pixel_mode = static_cast(face->glyph->bitmap.pixel_mode); + SkMask::Format maskFormat = static_cast(glyph.fMaskFormat); + + // Assume that the other formats do not exist. + SkASSERT(FT_PIXEL_MODE_MONO == pixel_mode || + FT_PIXEL_MODE_GRAY == pixel_mode || + FT_PIXEL_MODE_BGRA == pixel_mode); + + // These are the only formats this ScalerContext should request. + SkASSERT(SkMask::kBW_Format == maskFormat || + SkMask::kA8_Format == maskFormat || + SkMask::kARGB32_Format == maskFormat || + SkMask::kLCD16_Format == maskFormat); + + // If no scaling needed, directly copy glyph bitmap. + if (bitmapTransform.isIdentity()) { + SkMask dstMask = glyph.mask(); + copyFTBitmap(face->glyph->bitmap, dstMask); + break; + } + + // Otherwise, scale the bitmap. + + // Copy the FT_Bitmap into an SkBitmap (either A8 or ARGB) + SkBitmap unscaledBitmap; + // TODO: mark this as sRGB when the blits will be sRGB. + unscaledBitmap.setInfo(SkImageInfo::Make(face->glyph->bitmap.width, + face->glyph->bitmap.rows, + SkColorType_for_FTPixelMode(pixel_mode), + kPremul_SkAlphaType)); + if (!unscaledBitmap.tryAllocPixels()) { + // TODO: set the fImage to indicate "missing" + memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight); + return; + } + + SkMask unscaledBitmapAlias; + unscaledBitmapAlias.fImage = reinterpret_cast(unscaledBitmap.getPixels()); + unscaledBitmapAlias.fBounds.setWH(unscaledBitmap.width(), unscaledBitmap.height()); + unscaledBitmapAlias.fRowBytes = unscaledBitmap.rowBytes(); + unscaledBitmapAlias.fFormat = SkMaskFormat_for_SkColorType(unscaledBitmap.colorType()); + copyFTBitmap(face->glyph->bitmap, unscaledBitmapAlias); + + // Wrap the glyph's mask in a bitmap, unless the glyph's mask is BW or LCD. + // BW requires an A8 target for resizing, which can then be down sampled. + // LCD should use a 4x A8 target, which will then be down sampled. + // For simplicity, LCD uses A8 and is replicated. + int bitmapRowBytes = 0; + if (SkMask::kBW_Format != maskFormat && SkMask::kLCD16_Format != maskFormat) { + bitmapRowBytes = glyph.rowBytes(); + } + SkBitmap dstBitmap; + // TODO: mark this as sRGB when the blits will be sRGB. + dstBitmap.setInfo(SkImageInfo::Make(glyph.fWidth, glyph.fHeight, + SkColorType_for_SkMaskFormat(maskFormat), + kPremul_SkAlphaType), + bitmapRowBytes); + if (SkMask::kBW_Format == maskFormat || SkMask::kLCD16_Format == maskFormat) { + if (!dstBitmap.tryAllocPixels()) { + // TODO: set the fImage to indicate "missing" + memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight); + return; + } + } else { + dstBitmap.setPixels(glyph.fImage); + } + + // Scale unscaledBitmap into dstBitmap. + SkCanvas canvas(dstBitmap); + if constexpr (kSkShowTextBlitCoverage) { + canvas.clear(0x33FF0000); + } else { + canvas.clear(SK_ColorTRANSPARENT); + } + canvas.translate(-glyph.fLeft, -glyph.fTop); + canvas.concat(bitmapTransform); + canvas.translate(face->glyph->bitmap_left, -face->glyph->bitmap_top); + + SkSamplingOptions sampling(SkFilterMode::kLinear, SkMipmapMode::kNearest); + canvas.drawImage(unscaledBitmap.asImage().get(), 0, 0, sampling, nullptr); + + // If the destination is BW or LCD, convert from A8. + if (SkMask::kBW_Format == maskFormat) { + // Copy the A8 dstBitmap into the A1 glyph.fImage. + SkMask dstMask = glyph.mask(); + packA8ToA1(dstMask, dstBitmap.getAddr8(0, 0), dstBitmap.rowBytes()); + } else if (SkMask::kLCD16_Format == maskFormat) { + // Copy the A8 dstBitmap into the LCD16 glyph.fImage. + uint8_t* src = dstBitmap.getAddr8(0, 0); + uint16_t* dst = reinterpret_cast(glyph.fImage); + for (int y = dstBitmap.height(); y --> 0;) { + for (int x = 0; x < dstBitmap.width(); ++x) { + dst[x] = grayToRGB16(src[x]); + } + dst = (uint16_t*)((char*)dst + glyph.rowBytes()); + src += dstBitmap.rowBytes(); + } + } + } break; + + default: + SkDEBUGFAIL("unknown glyph format"); + memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight); + return; + } + +// We used to always do this pre-USE_COLOR_LUMINANCE, but with colorlum, +// it is optional +#if defined(SK_GAMMA_APPLY_TO_A8) + if (SkMask::kA8_Format == glyph.fMaskFormat && fPreBlend.isApplicable()) { + uint8_t* SK_RESTRICT dst = (uint8_t*)glyph.fImage; + unsigned rowBytes = glyph.rowBytes(); + + for (int y = glyph.fHeight - 1; y >= 0; --y) { + for (int x = glyph.fWidth - 1; x >= 0; --x) { + dst[x] = fPreBlend.fG[dst[x]]; + } + dst += rowBytes; + } + } +#endif +} + +/////////////////////////////////////////////////////////////////////////////// + +namespace { + +class SkFTGeometrySink { + SkPath* fPath; + bool fStarted; + FT_Vector fCurrent; + + void goingTo(const FT_Vector* pt) { + if (!fStarted) { + fStarted = true; + fPath->moveTo(SkFDot6ToScalar(fCurrent.x), -SkFDot6ToScalar(fCurrent.y)); + } + fCurrent = *pt; + } + + bool currentIsNot(const FT_Vector* pt) { + return fCurrent.x != pt->x || fCurrent.y != pt->y; + } + + static int Move(const FT_Vector* pt, void* ctx) { + SkFTGeometrySink& self = *(SkFTGeometrySink*)ctx; + if (self.fStarted) { + self.fPath->close(); + self.fStarted = false; + } + self.fCurrent = *pt; + return 0; + } + + static int Line(const FT_Vector* pt, void* ctx) { + SkFTGeometrySink& self = *(SkFTGeometrySink*)ctx; + if (self.currentIsNot(pt)) { + self.goingTo(pt); + self.fPath->lineTo(SkFDot6ToScalar(pt->x), -SkFDot6ToScalar(pt->y)); + } + return 0; + } + + static int Quad(const FT_Vector* pt0, const FT_Vector* pt1, void* ctx) { + SkFTGeometrySink& self = *(SkFTGeometrySink*)ctx; + if (self.currentIsNot(pt0) || self.currentIsNot(pt1)) { + self.goingTo(pt1); + self.fPath->quadTo(SkFDot6ToScalar(pt0->x), -SkFDot6ToScalar(pt0->y), + SkFDot6ToScalar(pt1->x), -SkFDot6ToScalar(pt1->y)); + } + return 0; + } + + static int Cubic(const FT_Vector* pt0, const FT_Vector* pt1, const FT_Vector* pt2, void* ctx) { + SkFTGeometrySink& self = *(SkFTGeometrySink*)ctx; + if (self.currentIsNot(pt0) || self.currentIsNot(pt1) || self.currentIsNot(pt2)) { + self.goingTo(pt2); + self.fPath->cubicTo(SkFDot6ToScalar(pt0->x), -SkFDot6ToScalar(pt0->y), + SkFDot6ToScalar(pt1->x), -SkFDot6ToScalar(pt1->y), + SkFDot6ToScalar(pt2->x), -SkFDot6ToScalar(pt2->y)); + } + return 0; + } + +public: + SkFTGeometrySink(SkPath* path) : fPath{path}, fStarted{false}, fCurrent{0,0} {} + + inline static constexpr const FT_Outline_Funcs Funcs{ + /*move_to =*/ SkFTGeometrySink::Move, + /*line_to =*/ SkFTGeometrySink::Line, + /*conic_to =*/ SkFTGeometrySink::Quad, + /*cubic_to =*/ SkFTGeometrySink::Cubic, + /*shift = */ 0, + /*delta =*/ 0, + }; +}; + +bool generateGlyphPathStatic(FT_Face face, SkPath* path) { + SkFTGeometrySink sink{path}; + if (face->glyph->format != FT_GLYPH_FORMAT_OUTLINE || + FT_Outline_Decompose(&face->glyph->outline, &SkFTGeometrySink::Funcs, &sink)) + { + path->reset(); + return false; + } + path->close(); + return true; +} + +bool generateFacePathStatic(FT_Face face, SkGlyphID glyphID, uint32_t loadGlyphFlags, SkPath* path){ + loadGlyphFlags |= FT_LOAD_BITMAP_METRICS_ONLY; // Don't decode any bitmaps. + loadGlyphFlags |= FT_LOAD_NO_BITMAP; // Ignore embedded bitmaps. + loadGlyphFlags &= ~FT_LOAD_RENDER; // Don't scan convert. + loadGlyphFlags &= ~FT_LOAD_COLOR; // Ignore SVG. + if (FT_Load_Glyph(face, glyphID, loadGlyphFlags)) { + path->reset(); + return false; + } + return generateGlyphPathStatic(face, path); +} + +#ifdef TT_SUPPORT_COLRV1 +bool generateFacePathCOLRv1(FT_Face face, SkGlyphID glyphID, SkPath* path) { + uint32_t flags = 0; + flags |= FT_LOAD_BITMAP_METRICS_ONLY; // Don't decode any bitmaps. + flags |= FT_LOAD_NO_BITMAP; // Ignore embedded bitmaps. + flags &= ~FT_LOAD_RENDER; // Don't scan convert. + flags &= ~FT_LOAD_COLOR; // Ignore SVG. + flags |= FT_LOAD_NO_HINTING; + flags |= FT_LOAD_NO_AUTOHINT; + flags |= FT_LOAD_IGNORE_TRANSFORM; + + SkUniqueFTSize unscaledFtSize([face]() -> FT_Size { + FT_Size size; + FT_Error err = FT_New_Size(face, &size); + if (err != 0) { + SK_TRACEFTR(err, "FT_New_Size(%s) failed in generateFacePathStaticCOLRv1.", + face->family_name); + return nullptr; + } + return size; + }()); + + if (!unscaledFtSize) { + return false; + } + + FT_Size oldSize = face->size; + + auto tryGeneratePath = [face, &unscaledFtSize, glyphID, flags, path]() { + FT_Error err = 0; + + err = FT_Activate_Size(unscaledFtSize.get()); + if (err != 0) { + return false; + } + + err = FT_Set_Char_Size(face, SkIntToFDot6(face->units_per_EM), + SkIntToFDot6(face->units_per_EM), 72, 72); + if (err != 0) { + return false; + } + + err = FT_Load_Glyph(face, glyphID, flags); + if (err != 0) { + path->reset(); + return false; + } + + if (!generateGlyphPathStatic(face, path)) { + path->reset(); + return false; + } + + return true; + }; + + bool pathGenerationResult = tryGeneratePath(); + + FT_Activate_Size(oldSize); + + return pathGenerationResult; +} +#endif + +} // namespace + +bool SkScalerContext_FreeType_Base::generateGlyphPath(FT_Face face, SkPath* path) { + if (!generateGlyphPathStatic(face, path)) { + return false; + } + if (face->glyph->outline.flags & FT_OUTLINE_OVERLAP) { + Simplify(*path, path); + // Simplify will return an even-odd path. + // A stroke+fill (for fake bold) may be incorrect for even-odd. + // https://github.com/flutter/flutter/issues/112546 + AsWinding(*path, path); + } + return true; +} + +bool SkScalerContext_FreeType_Base::generateFacePath(FT_Face face, + SkGlyphID glyphID, + uint32_t loadGlyphFlags, + SkPath* path) { + return generateFacePathStatic(face, glyphID, loadGlyphFlags, path); +} + +#ifdef TT_SUPPORT_COLRV1 +bool SkScalerContext_FreeType_Base::computeColrV1GlyphBoundingBox(FT_Face face, + SkGlyphID glyphID, + SkRect* bounds) { + SkMatrix ctm; + *bounds = SkRect::MakeEmpty(); + VisitedSet activePaints; + return colrv1_start_glyph_bounds(&ctm, bounds, face, glyphID, + FT_COLOR_INCLUDE_ROOT_TRANSFORM, &activePaints); +} +#endif diff --git a/gfx/skia/skia/src/ports/SkFontHost_FreeType_common.h b/gfx/skia/skia/src/ports/SkFontHost_FreeType_common.h new file mode 100644 index 0000000000..ec9ba8b8aa --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontHost_FreeType_common.h @@ -0,0 +1,191 @@ +/* + * Copyright 2006-2012 The Android Open Source Project + * Copyright 2012 Mozilla Foundation + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKFONTHOST_FREETYPE_COMMON_H_ +#define SKFONTHOST_FREETYPE_COMMON_H_ + +#include "include/core/SkSpan.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTArray.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkSharedMutex.h" +#include "src/utils/SkCharToGlyphCache.h" + +struct SkAdvancedTypefaceMetrics; +class SkFontDescriptor; +class SkFontData; + +// These are forward declared to avoid pimpl but also hide the FreeType implementation. +typedef struct FT_LibraryRec_* FT_Library; +typedef struct FT_FaceRec_* FT_Face; +typedef struct FT_StreamRec_* FT_Stream; +typedef signed long FT_Pos; +typedef struct FT_BBox_ FT_BBox; + + +#ifdef SK_DEBUG +const char* SkTraceFtrGetError(int); +#define SK_TRACEFTR(ERR, MSG, ...) \ + SkDebugf("%s:%d:1: error: 0x%x '%s' " MSG "\n", __FILE__, __LINE__, ERR, \ + SkTraceFtrGetError((int)(ERR)), __VA_ARGS__) +#else +#define SK_TRACEFTR(ERR, ...) do { sk_ignore_unused_variable(ERR); } while (false) +#endif + + +class SkScalerContext_FreeType_Base : public SkScalerContext { +protected: + // See http://freetype.sourceforge.net/freetype2/docs/reference/ft2-bitmap_handling.html#FT_Bitmap_Embolden + // This value was chosen by eyeballing the result in Firefox and trying to match it. + static const FT_Pos kBitmapEmboldenStrength = 1 << 6; + + SkScalerContext_FreeType_Base(sk_sp typeface, const SkScalerContextEffects& effects, + const SkDescriptor *desc) + : INHERITED(std::move(typeface), effects, desc) + {} + + bool drawCOLRv0Glyph(FT_Face, const SkGlyph&, uint32_t loadGlyphFlags, + SkSpan palette, SkCanvas*); + bool drawCOLRv1Glyph(FT_Face, const SkGlyph&, uint32_t loadGlyphFlags, + SkSpan palette, SkCanvas*); + bool drawSVGGlyph(FT_Face, const SkGlyph&, uint32_t loadGlyphFlags, + SkSpan palette, SkCanvas*); + void generateGlyphImage(FT_Face, const SkGlyph&, const SkMatrix& bitmapTransform); + bool generateGlyphPath(FT_Face, SkPath*); + bool generateFacePath(FT_Face, SkGlyphID, uint32_t loadGlyphFlags, SkPath*); + + /** Computes a bounding box for a COLRv1 glyph. + * + * This method may change the configured size and transforms on FT_Face. Make sure to + * configure size, matrix and load glyphs as needed after using this function to restore the + * state of FT_Face. + */ + static bool computeColrV1GlyphBoundingBox(FT_Face, SkGlyphID, SkRect* bounds); + + struct ScalerContextBits { + static const constexpr uint32_t COLRv0 = 1; + static const constexpr uint32_t COLRv1 = 2; + static const constexpr uint32_t SVG = 3; + }; +private: + using INHERITED = SkScalerContext; +}; + +class SkTypeface_FreeType : public SkTypeface { +public: + /** For SkFontMgrs to make use of our ability to extract + * name and style from a stream, using FreeType's API. + */ + class Scanner : ::SkNoncopyable { + public: + Scanner(); + ~Scanner(); + struct AxisDefinition { + SkFourByteTag fTag; + SkFixed fMinimum; + SkFixed fDefault; + SkFixed fMaximum; + }; + using AxisDefinitions = SkSTArray<4, AxisDefinition, true>; + bool recognizedFont(SkStreamAsset* stream, int* numFonts) const; + bool scanFont(SkStreamAsset* stream, int ttcIndex, + SkString* name, SkFontStyle* style, bool* isFixedPitch, + AxisDefinitions* axes) const; + static void computeAxisValues( + AxisDefinitions axisDefinitions, + const SkFontArguments::VariationPosition position, + SkFixed* axisValues, + const SkString& name, + const SkFontArguments::VariationPosition::Coordinate* currentPosition = nullptr); + static bool GetAxes(FT_Face face, AxisDefinitions* axes); + private: + FT_Face openFace(SkStreamAsset* stream, int ttcIndex, FT_Stream ftStream) const; + FT_Library fLibrary; + mutable SkMutex fLibraryMutex; + }; + + /** Fetch units/EM from "head" table if needed (ie for bitmap fonts) */ + static int GetUnitsPerEm(FT_Face face); + + /** Return the font data, or nullptr on failure. */ + std::unique_ptr makeFontData() const; + class FaceRec; + FaceRec* getFaceRec() const; + + static constexpr SkTypeface::FactoryId FactoryId = SkSetFourByteTag('f','r','e','e'); + static sk_sp MakeFromStream(std::unique_ptr, const SkFontArguments&); + +protected: + SkTypeface_FreeType(const SkFontStyle& style, bool isFixedPitch); + ~SkTypeface_FreeType() override; + + std::unique_ptr cloneFontData(const SkFontArguments&) const; + std::unique_ptr onCreateScalerContext(const SkScalerContextEffects&, + const SkDescriptor*) const override; + void onFilterRec(SkScalerContextRec*) const override; + void getGlyphToUnicodeMap(SkUnichar*) const override; + std::unique_ptr onGetAdvancedMetrics() const override; + void getPostScriptGlyphNames(SkString* dstArray) const override; + bool onGetPostScriptName(SkString*) const override; + int onGetUPEM() const override; + bool onGetKerningPairAdjustments(const uint16_t glyphs[], int count, + int32_t adjustments[]) const override; + void onCharsToGlyphs(const SkUnichar uni[], int count, SkGlyphID glyphs[]) const override; + int onCountGlyphs() const override; + + LocalizedStrings* onCreateFamilyNameIterator() const override; + + bool onGlyphMaskNeedsCurrentColor() const override; + int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const override; + int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const override; + int onGetTableTags(SkFontTableTag tags[]) const override; + size_t onGetTableData(SkFontTableTag, size_t offset, + size_t length, void* data) const override; + sk_sp onCopyTableData(SkFontTableTag) const override; + + virtual std::unique_ptr onMakeFontData() const = 0; + /** Utility to fill out the SkFontDescriptor palette information from the SkFontData. */ + static void FontDataPaletteToDescriptorPalette(const SkFontData&, SkFontDescriptor*); + +private: + mutable SkOnce fFTFaceOnce; + mutable std::unique_ptr fFaceRec; + + mutable SkSharedMutex fC2GCacheMutex; + mutable SkCharToGlyphCache fC2GCache; + + mutable SkOnce fGlyphMasksMayNeedCurrentColorOnce; + mutable bool fGlyphMasksMayNeedCurrentColor; + + using INHERITED = SkTypeface; +}; + +class SkTypeface_FreeTypeStream : public SkTypeface_FreeType { +public: + SkTypeface_FreeTypeStream(std::unique_ptr fontData, const SkString familyName, + const SkFontStyle& style, bool isFixedPitch); + ~SkTypeface_FreeTypeStream() override; + +protected: + void onGetFamilyName(SkString* familyName) const override; + void onGetFontDescriptor(SkFontDescriptor*, bool* serialize) const override; + std::unique_ptr onOpenStream(int* ttcIndex) const override; + std::unique_ptr onMakeFontData() const override; + sk_sp onMakeClone(const SkFontArguments&) const override; + +private: + const SkString fFamilyName; + const std::unique_ptr fData; +}; + +#endif // SKFONTHOST_FREETYPE_COMMON_H_ diff --git a/gfx/skia/skia/src/ports/SkFontHost_cairo.cpp b/gfx/skia/skia/src/ports/SkFontHost_cairo.cpp new file mode 100644 index 0000000000..f276117c46 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontHost_cairo.cpp @@ -0,0 +1,681 @@ + +/* + * Copyright 2012 Mozilla Foundation + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/ports/SkFontHost_FreeType_common.h" + +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkFDot6.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkPath.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkTypefaceCache.h" + +#include + +#include +#include FT_FREETYPE_H +#include FT_OUTLINE_H + +// for FT_GlyphSlot_Embolden +#ifdef FT_SYNTHESIS_H +#include FT_SYNTHESIS_H +#endif + +// for FT_Library_SetLcdFilter +#ifdef FT_LCD_FILTER_H +#include FT_LCD_FILTER_H +#else +typedef enum FT_LcdFilter_ +{ + FT_LCD_FILTER_NONE = 0, + FT_LCD_FILTER_DEFAULT = 1, + FT_LCD_FILTER_LIGHT = 2, + FT_LCD_FILTER_LEGACY = 16, +} FT_LcdFilter; +#endif + +// If compiling with FreeType before 2.5.0 +#ifndef FT_LOAD_COLOR +# define FT_LOAD_COLOR ( 1L << 20 ) +# define FT_PIXEL_MODE_BGRA 7 +#endif + +// If compiling with FreeType before 2.12.0 +#ifndef FT_FACE_FLAG_SVG +// We need the format tag so that we can switch on it and handle a possibly- +// newer version of the library at runtime. +static constexpr FT_UInt32 FT_IMAGE_TAG(FT_GLYPH_FORMAT_SVG, 'S', 'V', 'G', ' '); +#endif + +#ifndef SK_CAN_USE_DLOPEN +#define SK_CAN_USE_DLOPEN 1 +#endif +#if SK_CAN_USE_DLOPEN +#include +#endif + +#ifndef SK_FONTHOST_CAIRO_STANDALONE +#define SK_FONTHOST_CAIRO_STANDALONE 1 +#endif + +static bool gFontHintingEnabled = true; +static FT_Error (*gSetLcdFilter)(FT_Library, FT_LcdFilter) = nullptr; + +extern "C" +{ + void mozilla_LockFTLibrary(FT_Library aLibrary); + void mozilla_UnlockFTLibrary(FT_Library aLibrary); + void mozilla_AddRefSharedFTFace(void* aContext); + void mozilla_ReleaseSharedFTFace(void* aContext, void* aOwner); + void mozilla_ForgetSharedFTFaceLockOwner(void* aContext, void* aOwner); + int mozilla_LockSharedFTFace(void* aContext, void* aOwner); + void mozilla_UnlockSharedFTFace(void* aContext); + FT_Error mozilla_LoadFTGlyph(FT_Face aFace, uint32_t aGlyphIndex, int32_t aFlags); + void mozilla_glyphslot_embolden_less(FT_GlyphSlot slot); +} + +void SkInitCairoFT(bool fontHintingEnabled) +{ + gFontHintingEnabled = fontHintingEnabled; +#if SK_CAN_USE_DLOPEN + gSetLcdFilter = (FT_Error (*)(FT_Library, FT_LcdFilter))dlsym(RTLD_DEFAULT, "FT_Library_SetLcdFilter"); +#else + gSetLcdFilter = &FT_Library_SetLcdFilter; +#endif + // FT_Library_SetLcdFilter may be provided but have no effect if FreeType + // is built without FT_CONFIG_OPTION_SUBPIXEL_RENDERING. + if (gSetLcdFilter && + gSetLcdFilter(nullptr, FT_LCD_FILTER_NONE) == FT_Err_Unimplemented_Feature) { + gSetLcdFilter = nullptr; + } +} + +class SkScalerContext_CairoFT : public SkScalerContext_FreeType_Base { +public: + SkScalerContext_CairoFT(sk_sp typeface, + const SkScalerContextEffects& effects, + const SkDescriptor* desc, FT_Face face, + void* faceContext, SkPixelGeometry pixelGeometry, + FT_LcdFilter lcdFilter); + + virtual ~SkScalerContext_CairoFT() { + mozilla_ForgetSharedFTFaceLockOwner(fFTFaceContext, this); + } + + bool isValid() const { return fFTFaceContext != nullptr; } + + void Lock() { + if (!mozilla_LockSharedFTFace(fFTFaceContext, this)) { + FT_Set_Transform(fFTFace, fHaveShape ? &fShapeMatrixFT : nullptr, nullptr); + FT_Set_Char_Size(fFTFace, FT_F26Dot6(fScaleX * 64.0f + 0.5f), + FT_F26Dot6(fScaleY * 64.0f + 0.5f), 0, 0); + } + } + + void Unlock() { mozilla_UnlockSharedFTFace(fFTFaceContext); } + +protected: + bool generateAdvance(SkGlyph* glyph) override; + void generateMetrics(SkGlyph* glyph, SkArenaAlloc* arena) override; + void generateImage(const SkGlyph& glyph) override; + bool generatePath(const SkGlyph& glyph, SkPath* path) override; + void generateFontMetrics(SkFontMetrics* metrics) override; + +private: + bool computeShapeMatrix(const SkMatrix& m); + void prepareGlyph(FT_GlyphSlot glyph); + + FT_Face fFTFace; + void* fFTFaceContext; + FT_Int32 fLoadGlyphFlags; + FT_LcdFilter fLcdFilter; + SkScalar fScaleX; + SkScalar fScaleY; + SkMatrix fShapeMatrix; + FT_Matrix fShapeMatrixFT; + bool fHaveShape; +}; + +class AutoLockFTFace { +public: + AutoLockFTFace(SkScalerContext_CairoFT* scalerContext) + : fScalerContext(scalerContext) { + fScalerContext->Lock(); + } + + ~AutoLockFTFace() { fScalerContext->Unlock(); } + +private: + SkScalerContext_CairoFT* fScalerContext; +}; + +static bool isLCD(const SkScalerContextRec& rec) { + return SkMask::kLCD16_Format == rec.fMaskFormat; +} + +static bool bothZero(SkScalar a, SkScalar b) { + return 0 == a && 0 == b; +} + +// returns false if there is any non-90-rotation or skew +static bool isAxisAligned(const SkScalerContextRec& rec) { + return 0 == rec.fPreSkewX && + (bothZero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || + bothZero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); +} + +class SkCairoFTTypeface : public SkTypeface { +public: + std::unique_ptr onOpenStream(int*) const override { return nullptr; } + + std::unique_ptr onGetAdvancedMetrics() const override + { + SkDEBUGCODE(SkDebugf("SkCairoFTTypeface::onGetAdvancedMetrics unimplemented\n")); + return nullptr; + } + + std::unique_ptr onCreateScalerContext(const SkScalerContextEffects& effects, const SkDescriptor* desc) const override + { + SkScalerContext_CairoFT* ctx = new SkScalerContext_CairoFT( + sk_ref_sp(const_cast(this)), effects, desc, + fFTFace, fFTFaceContext, fPixelGeometry, fLcdFilter); + std::unique_ptr result(ctx); + if (!ctx->isValid()) { + return nullptr; + } + return result; + } + + void onFilterRec(SkScalerContextRec* rec) const override + { + // rotated text looks bad with hinting, so we disable it as needed + if (!gFontHintingEnabled || !isAxisAligned(*rec)) { + rec->setHinting(SkFontHinting::kNone); + } + + // Don't apply any gamma so that we match cairo-ft's results. + rec->ignorePreBlend(); + } + + void onGetFontDescriptor(SkFontDescriptor*, bool*) const override + { + SkDEBUGCODE(SkDebugf("SkCairoFTTypeface::onGetFontDescriptor unimplemented\n")); + } + + void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override + { + mozilla_LockSharedFTFace(fFTFaceContext, nullptr); + for (int i = 0; i < count; ++i) { + glyphs[i] = SkToU16(FT_Get_Char_Index(fFTFace, chars[i])); + } + mozilla_UnlockSharedFTFace(fFTFaceContext); + } + + int onCountGlyphs() const override + { + return fFTFace->num_glyphs; + } + + int onGetUPEM() const override + { + return 0; + } + + SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override + { + return nullptr; + } + + void onGetFamilyName(SkString* familyName) const override + { + familyName->reset(); + } + + bool onGetPostScriptName(SkString*) const override { + return false; + } + + bool onGlyphMaskNeedsCurrentColor() const override { + return false; + } + + int onGetTableTags(SkFontTableTag*) const override + { + return 0; + } + + size_t onGetTableData(SkFontTableTag, size_t, size_t, void*) const override + { + return 0; + } + + void getPostScriptGlyphNames(SkString*) const override {} + + void getGlyphToUnicodeMap(SkUnichar*) const override {} + + int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const override + { + return 0; + } + + int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const override + { + return 0; + } + + sk_sp onMakeClone(const SkFontArguments& args) const override { + return sk_ref_sp(this); + } + + SkCairoFTTypeface(FT_Face face, void* faceContext, + SkPixelGeometry pixelGeometry, FT_LcdFilter lcdFilter) + : SkTypeface(SkFontStyle::Normal()) + , fFTFace(face) + , fFTFaceContext(faceContext) + , fPixelGeometry(pixelGeometry) + , fLcdFilter(lcdFilter) + { + mozilla_AddRefSharedFTFace(fFTFaceContext); + } + + void* GetFTFaceContext() const { return fFTFaceContext; } + + bool hasColorGlyphs() const override + { + // Check if the font has scalable outlines. If not, then avoid trying + // to render it as a path. + if (fFTFace) { + return !FT_IS_SCALABLE(fFTFace); + } + return false; + } + +private: + ~SkCairoFTTypeface() + { + mozilla_ReleaseSharedFTFace(fFTFaceContext, nullptr); + } + + FT_Face fFTFace; + void* fFTFaceContext; + SkPixelGeometry fPixelGeometry; + FT_LcdFilter fLcdFilter; +}; + +static bool FindByFTFaceContext(SkTypeface* typeface, void* context) { + return static_cast(typeface)->GetFTFaceContext() == context; +} + +SkTypeface* SkCreateTypefaceFromCairoFTFont(FT_Face face, void* faceContext, + SkPixelGeometry pixelGeometry, + uint8_t lcdFilter) +{ + sk_sp typeface = + SkTypefaceCache::FindByProcAndRef(FindByFTFaceContext, faceContext); + if (!typeface) { + typeface = sk_make_sp(face, faceContext, pixelGeometry, + (FT_LcdFilter)lcdFilter); + SkTypefaceCache::Add(typeface); + } + + return typeface.release(); +} + +SkScalerContext_CairoFT::SkScalerContext_CairoFT( + sk_sp typeface, const SkScalerContextEffects& effects, + const SkDescriptor* desc, FT_Face face, void* faceContext, + SkPixelGeometry pixelGeometry, FT_LcdFilter lcdFilter) + : SkScalerContext_FreeType_Base(std::move(typeface), effects, desc) + , fFTFace(face) + , fFTFaceContext(faceContext) + , fLcdFilter(lcdFilter) +{ + SkMatrix matrix; + fRec.getSingleMatrix(&matrix); + + computeShapeMatrix(matrix); + + FT_Int32 loadFlags = FT_LOAD_DEFAULT; + + if (SkMask::kBW_Format == fRec.fMaskFormat) { + if (fRec.getHinting() == SkFontHinting::kNone) { + loadFlags |= FT_LOAD_NO_HINTING; + } else { + loadFlags = FT_LOAD_TARGET_MONO; + } + loadFlags |= FT_LOAD_MONOCHROME; + } else { + if (isLCD(fRec)) { + switch (pixelGeometry) { + case kRGB_H_SkPixelGeometry: + default: + break; + case kRGB_V_SkPixelGeometry: + fRec.fFlags |= SkScalerContext::kLCD_Vertical_Flag; + break; + case kBGR_H_SkPixelGeometry: + fRec.fFlags |= SkScalerContext::kLCD_BGROrder_Flag; + break; + case kBGR_V_SkPixelGeometry: + fRec.fFlags |= SkScalerContext::kLCD_Vertical_Flag | + SkScalerContext::kLCD_BGROrder_Flag; + break; + } + } + + switch (fRec.getHinting()) { + case SkFontHinting::kNone: + loadFlags |= FT_LOAD_NO_HINTING; + break; + case SkFontHinting::kSlight: + loadFlags = FT_LOAD_TARGET_LIGHT; // This implies FORCE_AUTOHINT + break; + case SkFontHinting::kNormal: + if (fRec.fFlags & SkScalerContext::kForceAutohinting_Flag) { + loadFlags |= FT_LOAD_FORCE_AUTOHINT; + } + break; + case SkFontHinting::kFull: + if (isLCD(fRec)) { + if (fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag) { + loadFlags = FT_LOAD_TARGET_LCD_V; + } else { + loadFlags = FT_LOAD_TARGET_LCD; + } + } + if (fRec.fFlags & SkScalerContext::kForceAutohinting_Flag) { + loadFlags |= FT_LOAD_FORCE_AUTOHINT; + } + break; + default: + SkDebugf("---------- UNKNOWN hinting %d\n", fRec.getHinting()); + break; + } + } + + // Disable autohinting when asked to disable hinting, except for "tricky" fonts. + if (!gFontHintingEnabled) { + if (fFTFace && !(fFTFace->face_flags & FT_FACE_FLAG_TRICKY)) { + loadFlags |= FT_LOAD_NO_AUTOHINT; + } + } + + if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0) { + loadFlags |= FT_LOAD_NO_BITMAP; + } + + // Always using FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH to get correct + // advances, as fontconfig and cairo do. + // See http://code.google.com/p/skia/issues/detail?id=222. + loadFlags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; + + loadFlags |= FT_LOAD_COLOR; + + fLoadGlyphFlags = loadFlags; +} + +bool SkScalerContext_CairoFT::computeShapeMatrix(const SkMatrix& m) +{ + // Compute a shape matrix compatible with Cairo's _compute_transform. + // Finds major/minor scales and uses them to normalize the transform. + double scaleX = m.getScaleX(); + double skewX = m.getSkewX(); + double skewY = m.getSkewY(); + double scaleY = m.getScaleY(); + double det = scaleX * scaleY - skewY * skewX; + if (!std::isfinite(det)) { + fScaleX = fRec.fTextSize * fRec.fPreScaleX; + fScaleY = fRec.fTextSize; + fHaveShape = false; + return false; + } + double major = det != 0.0 ? hypot(scaleX, skewY) : 0.0; + double minor = major != 0.0 ? fabs(det) / major : 0.0; + // Limit scales to be above 1pt. + major = std::max(major, 1.0); + minor = std::max(minor, 1.0); + + // If the font is not scalable, then choose the best available size. + if (fFTFace && !FT_IS_SCALABLE(fFTFace)) { + double bestDist = DBL_MAX; + FT_Int bestSize = -1; + for (FT_Int i = 0; i < fFTFace->num_fixed_sizes; i++) { + // Distance is positive if strike is larger than desired size, + // or negative if smaller. If previously a found smaller strike, + // then prefer a larger strike. Otherwise, minimize distance. + double dist = fFTFace->available_sizes[i].y_ppem / 64.0 - minor; + if (bestDist < 0 ? dist >= bestDist : fabs(dist) <= bestDist) { + bestDist = dist; + bestSize = i; + } + } + if (bestSize < 0) { + fScaleX = fRec.fTextSize * fRec.fPreScaleX; + fScaleY = fRec.fTextSize; + fHaveShape = false; + return false; + } + major = fFTFace->available_sizes[bestSize].x_ppem / 64.0; + minor = fFTFace->available_sizes[bestSize].y_ppem / 64.0; + fHaveShape = true; + } else { + fHaveShape = !m.isScaleTranslate() || scaleX < 0.0 || scaleY < 0.0; + } + + fScaleX = SkDoubleToScalar(major); + fScaleY = SkDoubleToScalar(minor); + + if (fHaveShape) { + // Normalize the transform and convert to fixed-point. + fShapeMatrix = m; + fShapeMatrix.preScale(SkDoubleToScalar(1.0 / major), SkDoubleToScalar(1.0 / minor)); + + fShapeMatrixFT.xx = SkScalarToFixed(fShapeMatrix.getScaleX()); + fShapeMatrixFT.yx = SkScalarToFixed(-fShapeMatrix.getSkewY()); + fShapeMatrixFT.xy = SkScalarToFixed(-fShapeMatrix.getSkewX()); + fShapeMatrixFT.yy = SkScalarToFixed(fShapeMatrix.getScaleY()); + } + return true; +} + +bool SkScalerContext_CairoFT::generateAdvance(SkGlyph* glyph) +{ + generateMetrics(glyph, nullptr); + return !glyph->isEmpty(); +} + +void SkScalerContext_CairoFT::prepareGlyph(FT_GlyphSlot glyph) +{ + if (fRec.fFlags & SkScalerContext::kEmbolden_Flag) { + // Not FT_GlyphSlot_Embolden because we want a less extreme effect. + mozilla_glyphslot_embolden_less(glyph); + } +} + +void SkScalerContext_CairoFT::generateMetrics(SkGlyph* glyph, SkArenaAlloc* arena) +{ + glyph->fMaskFormat = fRec.fMaskFormat; + + glyph->zeroMetrics(); + + AutoLockFTFace faceLock(this); + + FT_Error err = mozilla_LoadFTGlyph(fFTFace, glyph->getGlyphID(), fLoadGlyphFlags); + if (err != 0) { + return; + } + + prepareGlyph(fFTFace->glyph); + + glyph->fAdvanceX = SkFDot6ToFloat(fFTFace->glyph->advance.x); + glyph->fAdvanceY = -SkFDot6ToFloat(fFTFace->glyph->advance.y); + + SkIRect bounds; + switch (fFTFace->glyph->format) { + case FT_GLYPH_FORMAT_OUTLINE: + if (!fFTFace->glyph->outline.n_contours) { + return; + } + + FT_BBox bbox; + FT_Outline_Get_CBox(&fFTFace->glyph->outline, &bbox); + if (this->isSubpixel()) { + int dx = SkFixedToFDot6(glyph->getSubXFixed()); + int dy = SkFixedToFDot6(glyph->getSubYFixed()); + bbox.xMin += dx; + bbox.yMin -= dy; + bbox.xMax += dx; + bbox.yMax -= dy; + } + bbox.xMin &= ~63; + bbox.yMin &= ~63; + bbox.xMax = (bbox.xMax + 63) & ~63; + bbox.yMax = (bbox.yMax + 63) & ~63; + bounds = SkIRect::MakeLTRB(SkFDot6Floor(bbox.xMin), + -SkFDot6Floor(bbox.yMax), + SkFDot6Floor(bbox.xMax), + -SkFDot6Floor(bbox.yMin)); + + if (isLCD(fRec)) { + // In FreeType < 2.8.1, LCD filtering, if explicitly used, may + // add padding to the glyph. When not used, there is no padding. + // As of 2.8.1, LCD filtering is now always supported and may + // add padding even if an LCD filter is not explicitly set. + // Regardless, if no LCD filtering is used, or if LCD filtering + // doesn't add padding, it is safe to modify the glyph's bounds + // here. generateGlyphImage will detect if the mask is smaller + // than the bounds and clip things appropriately. + if (fRec.fFlags & kLCD_Vertical_Flag) { + bounds.outset(0, 1); + } else { + bounds.outset(1, 0); + } + } + break; + case FT_GLYPH_FORMAT_BITMAP: + if (fFTFace->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_BGRA) { + glyph->fMaskFormat = SkMask::kARGB32_Format; + } + + if (isLCD(fRec)) { + fRec.fMaskFormat = SkMask::kA8_Format; + } + + if (fHaveShape) { + // Ensure filtering is preserved when the bitmap is transformed. + // Otherwise, the result will look horrifically aliased. + if (fRec.fMaskFormat == SkMask::kBW_Format) { + fRec.fMaskFormat = SkMask::kA8_Format; + } + + // Apply the shape matrix to the glyph's bounding box. + SkRect srcRect = SkRect::MakeXYWH( + SkIntToScalar(fFTFace->glyph->bitmap_left), + -SkIntToScalar(fFTFace->glyph->bitmap_top), + SkIntToScalar(fFTFace->glyph->bitmap.width), + SkIntToScalar(fFTFace->glyph->bitmap.rows)); + SkRect destRect; + fShapeMatrix.mapRect(&destRect, srcRect); + SkIRect glyphRect = destRect.roundOut(); + bounds = SkIRect::MakeXYWH(SkScalarRoundToInt(destRect.fLeft), + SkScalarRoundToInt(destRect.fTop), + glyphRect.width(), + glyphRect.height()); + } else { + bounds = SkIRect::MakeXYWH(fFTFace->glyph->bitmap_left, + -fFTFace->glyph->bitmap_top, + fFTFace->glyph->bitmap.width, + fFTFace->glyph->bitmap.rows); + } + break; + case FT_GLYPH_FORMAT_SVG: + // We don't support getting glyph bounds for SVG, but at least the advance + // should be correctly returned, and we don't want to fire an assertion. + break; + default: + SkDEBUGFAIL("unknown glyph format"); + return; + } + + if (SkIRect::MakeXYWH(SHRT_MIN, SHRT_MIN, USHRT_MAX, USHRT_MAX).contains(bounds)) { + glyph->fWidth = SkToU16(bounds.width()); + glyph->fHeight = SkToU16(bounds.height()); + glyph->fLeft = SkToS16(bounds.left()); + glyph->fTop = SkToS16(bounds.top()); + } +} + +void SkScalerContext_CairoFT::generateImage(const SkGlyph& glyph) +{ + AutoLockFTFace faceLock(this); + + FT_Error err = mozilla_LoadFTGlyph(fFTFace, glyph.getGlyphID(), fLoadGlyphFlags); + + if (err != 0) { + memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight); + return; + } + + prepareGlyph(fFTFace->glyph); + + bool useLcdFilter = + fFTFace->glyph->format == FT_GLYPH_FORMAT_OUTLINE && + glyph.maskFormat() == SkMask::kLCD16_Format && + gSetLcdFilter; + if (useLcdFilter) { + mozilla_LockFTLibrary(fFTFace->glyph->library); + gSetLcdFilter(fFTFace->glyph->library, fLcdFilter); + } + + SkMatrix matrix; + if (fFTFace->glyph->format == FT_GLYPH_FORMAT_BITMAP && + fHaveShape) { + matrix = fShapeMatrix; + } else { + matrix.setIdentity(); + } + generateGlyphImage(fFTFace, glyph, matrix); + + if (useLcdFilter) { + gSetLcdFilter(fFTFace->glyph->library, FT_LCD_FILTER_NONE); + mozilla_UnlockFTLibrary(fFTFace->glyph->library); + } +} + +bool SkScalerContext_CairoFT::generatePath(const SkGlyph& glyph, SkPath* path) +{ + AutoLockFTFace faceLock(this); + + SkASSERT(path); + + SkGlyphID glyphID = glyph.getGlyphID(); + + uint32_t flags = fLoadGlyphFlags; + flags |= FT_LOAD_NO_BITMAP; // ignore embedded bitmaps so we're sure to get the outline + flags &= ~FT_LOAD_RENDER; // don't scan convert (we just want the outline) + + FT_Error err = mozilla_LoadFTGlyph(fFTFace, glyphID, flags); + + if (err != 0) { + path->reset(); + return false; + } + + prepareGlyph(fFTFace->glyph); + + return generateGlyphPath(fFTFace, path); +} + +void SkScalerContext_CairoFT::generateFontMetrics(SkFontMetrics* metrics) +{ + if (metrics) { + memset(metrics, 0, sizeof(SkFontMetrics)); + } +} diff --git a/gfx/skia/skia/src/ports/SkFontHost_win.cpp b/gfx/skia/skia/src/ports/SkFontHost_win.cpp new file mode 100644 index 0000000000..4e18aa6820 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontHost_win.cpp @@ -0,0 +1,2356 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) + +#include "include/core/SkData.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkPath.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/ports/SkTypeface_win.h" +#include "src/ports/SkTypeface_win_dw.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkMacros.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "include/utils/SkBase64.h" +#include "src/base/SkLeanWindows.h" +#include "src/base/SkUTF.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkDescriptor.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkMaskGamma.h" +#include "src/core/SkStrikeCache.h" +#include "src/core/SkTypefaceCache.h" +#include "src/sfnt/SkOTTable_OS_2.h" +#include "src/sfnt/SkOTTable_maxp.h" +#include "src/sfnt/SkOTTable_name.h" +#include "src/sfnt/SkOTUtils.h" +#include "src/sfnt/SkSFNTHeader.h" +#include "src/utils/SkMatrix22.h" +#include "src/utils/win/SkHRESULT.h" + +#include +#include +#include + +using namespace skia_private; + +namespace { +static inline const constexpr bool kSkShowTextBlitCoverage = false; +} + +static void (*gEnsureLOGFONTAccessibleProc)(const LOGFONT&); + +void SkTypeface_SetEnsureLOGFONTAccessibleProc(void (*proc)(const LOGFONT&)) { + gEnsureLOGFONTAccessibleProc = proc; +} + +static void call_ensure_accessible(const LOGFONT& lf) { + if (gEnsureLOGFONTAccessibleProc) { + gEnsureLOGFONTAccessibleProc(lf); + } +} + +/////////////////////////////////////////////////////////////////////////////// + +// always packed xxRRGGBB +typedef uint32_t SkGdiRGB; + +// define this in your Makefile or .gyp to enforce AA requests +// which GDI ignores at small sizes. This flag guarantees AA +// for rotated text, regardless of GDI's notions. +//#define SK_ENFORCE_ROTATED_TEXT_AA_ON_WINDOWS + +static bool isLCD(const SkScalerContextRec& rec) { + return SkMask::kLCD16_Format == rec.fMaskFormat; +} + +static bool bothZero(SkScalar a, SkScalar b) { + return 0 == a && 0 == b; +} + +// returns false if there is any non-90-rotation or skew +static bool isAxisAligned(const SkScalerContextRec& rec) { + return 0 == rec.fPreSkewX && + (bothZero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || + bothZero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); +} + +static bool needToRenderWithSkia(const SkScalerContextRec& rec) { +#ifdef SK_ENFORCE_ROTATED_TEXT_AA_ON_WINDOWS + // What we really want to catch is when GDI will ignore the AA request and give + // us BW instead. Smallish rotated text is one heuristic, so this code is just + // an approximation. We shouldn't need to do this for larger sizes, but at those + // sizes, the quality difference gets less and less between our general + // scanconverter and GDI's. + if (SkMask::kA8_Format == rec.fMaskFormat && !isAxisAligned(rec)) { + return true; + } +#endif + return rec.getHinting() == SkFontHinting::kNone || rec.getHinting() == SkFontHinting::kSlight; +} + +static void tchar_to_skstring(const TCHAR t[], SkString* s) { +#ifdef UNICODE + size_t sSize = WideCharToMultiByte(CP_UTF8, 0, t, -1, nullptr, 0, nullptr, nullptr); + s->resize(sSize); + WideCharToMultiByte(CP_UTF8, 0, t, -1, s->data(), sSize, nullptr, nullptr); +#else + s->set(t); +#endif +} + +static void dcfontname_to_skstring(HDC deviceContext, const LOGFONT& lf, SkString* familyName) { + int fontNameLen; //length of fontName in TCHARS. + if (0 == (fontNameLen = GetTextFace(deviceContext, 0, nullptr))) { + call_ensure_accessible(lf); + if (0 == (fontNameLen = GetTextFace(deviceContext, 0, nullptr))) { + fontNameLen = 0; + } + } + + AutoSTArray fontName(fontNameLen+1); + if (0 == GetTextFace(deviceContext, fontNameLen, fontName.get())) { + call_ensure_accessible(lf); + if (0 == GetTextFace(deviceContext, fontNameLen, fontName.get())) { + fontName[0] = 0; + } + } + + tchar_to_skstring(fontName.get(), familyName); +} + +static void make_canonical(LOGFONT* lf) { + lf->lfHeight = -64; + lf->lfWidth = 0; // lfWidth is related to lfHeight, not to the OS/2::usWidthClass. + lf->lfQuality = CLEARTYPE_QUALITY;//PROOF_QUALITY; + lf->lfCharSet = DEFAULT_CHARSET; +// lf->lfClipPrecision = 64; +} + +static SkFontStyle get_style(const LOGFONT& lf) { + return SkFontStyle(lf.lfWeight, + SkFontStyle::kNormal_Width, + lf.lfItalic ? SkFontStyle::kItalic_Slant : SkFontStyle::kUpright_Slant); +} + +static inline FIXED SkFixedToFIXED(SkFixed x) { + return *(FIXED*)(&x); +} +static inline SkFixed SkFIXEDToFixed(FIXED x) { + return *(SkFixed*)(&x); +} + +static inline FIXED SkScalarToFIXED(SkScalar x) { + return SkFixedToFIXED(SkScalarToFixed(x)); +} + +static inline SkScalar SkFIXEDToScalar(FIXED x) { + return SkFixedToScalar(SkFIXEDToFixed(x)); +} + +static unsigned calculateGlyphCount(HDC hdc, const LOGFONT& lf) { + TEXTMETRIC textMetric; + if (0 == GetTextMetrics(hdc, &textMetric)) { + textMetric.tmPitchAndFamily = TMPF_VECTOR; + call_ensure_accessible(lf); + GetTextMetrics(hdc, &textMetric); + } + + if (!(textMetric.tmPitchAndFamily & TMPF_VECTOR)) { + return textMetric.tmLastChar; + } + + // The 'maxp' table stores the number of glyphs at offset 4, in 2 bytes. + uint16_t glyphs; + if (GDI_ERROR != GetFontData(hdc, SkOTTableMaximumProfile::TAG, 4, &glyphs, sizeof(glyphs))) { + return SkEndian_SwapBE16(glyphs); + } + + // Binary search for glyph count. + static const MAT2 mat2 = {{0, 1}, {0, 0}, {0, 0}, {0, 1}}; + int32_t max = UINT16_MAX + 1; + int32_t min = 0; + GLYPHMETRICS gm; + while (min < max) { + int32_t mid = min + ((max - min) / 2); + if (GetGlyphOutlineW(hdc, mid, GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, + nullptr, &mat2) == GDI_ERROR) { + max = mid; + } else { + min = mid + 1; + } + } + SkASSERT(min == max); + return min; +} + +static unsigned calculateUPEM(HDC hdc, const LOGFONT& lf) { + TEXTMETRIC textMetric; + if (0 == GetTextMetrics(hdc, &textMetric)) { + textMetric.tmPitchAndFamily = TMPF_VECTOR; + call_ensure_accessible(lf); + GetTextMetrics(hdc, &textMetric); + } + + if (!(textMetric.tmPitchAndFamily & TMPF_VECTOR)) { + return textMetric.tmMaxCharWidth; + } + + OUTLINETEXTMETRIC otm; + unsigned int otmRet = GetOutlineTextMetrics(hdc, sizeof(otm), &otm); + if (0 == otmRet) { + call_ensure_accessible(lf); + otmRet = GetOutlineTextMetrics(hdc, sizeof(otm), &otm); + } + + return (0 == otmRet) ? 0 : otm.otmEMSquare; +} + +class SkAutoHDC { +public: + explicit SkAutoHDC(const LOGFONT& lf) + : fHdc(::CreateCompatibleDC(nullptr)) + , fFont(::CreateFontIndirect(&lf)) + , fSavefont((HFONT)::SelectObject(fHdc, fFont)) + { } + ~SkAutoHDC() { + if (fHdc) { + ::SelectObject(fHdc, fSavefont); + ::DeleteDC(fHdc); + } + if (fFont) { + ::DeleteObject(fFont); + } + } + operator HDC() { return fHdc; } +private: + HDC fHdc; + HFONT fFont; + HFONT fSavefont; +}; + +class LogFontTypeface : public SkTypeface { +public: + LogFontTypeface(const SkFontStyle& style, const LOGFONT& lf, bool serializeAsStream) + : SkTypeface(style, false) + , fLogFont(lf) + , fSerializeAsStream(serializeAsStream) + { + SkAutoHDC hdc(fLogFont); + TEXTMETRIC textMetric; + if (0 == GetTextMetrics(hdc, &textMetric)) { + call_ensure_accessible(lf); + if (0 == GetTextMetrics(hdc, &textMetric)) { + textMetric.tmPitchAndFamily = TMPF_TRUETYPE; + } + } + + // The fixed pitch bit is set if the font is *not* fixed pitch. + this->setIsFixedPitch((textMetric.tmPitchAndFamily & TMPF_FIXED_PITCH) == 0); + this->setFontStyle(SkFontStyle(textMetric.tmWeight, style.width(), style.slant())); + + // Used a logfont on a memory context, should never get a device font. + // Therefore all TMPF_DEVICE will be PostScript (cubic) fonts. + // If the font has cubic outlines, it will not be rendered with ClearType. + fCanBeLCD = !((textMetric.tmPitchAndFamily & TMPF_VECTOR) && + (textMetric.tmPitchAndFamily & TMPF_DEVICE)); + } + + LOGFONT fLogFont; + bool fSerializeAsStream; + bool fCanBeLCD; + + static sk_sp Make(const LOGFONT& lf) { + return sk_sp(new LogFontTypeface(get_style(lf), lf, false)); + } + + static void EnsureAccessible(const SkTypeface* face) { + call_ensure_accessible(static_cast(face)->fLogFont); + } + +protected: + std::unique_ptr onOpenStream(int* ttcIndex) const override; + sk_sp onMakeClone(const SkFontArguments& args) const override; + std::unique_ptr onCreateScalerContext(const SkScalerContextEffects&, + const SkDescriptor*) const override; + void onFilterRec(SkScalerContextRec*) const override; + void getGlyphToUnicodeMap(SkUnichar*) const override; + std::unique_ptr onGetAdvancedMetrics() const override; + void onGetFontDescriptor(SkFontDescriptor*, bool*) const override; + void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override; + int onCountGlyphs() const override; + void getPostScriptGlyphNames(SkString*) const override; + int onGetUPEM() const override; + void onGetFamilyName(SkString* familyName) const override; + bool onGetPostScriptName(SkString*) const override { return false; } + SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override; + bool onGlyphMaskNeedsCurrentColor() const override { return false; } + int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const override + { + return -1; + } + int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const override + { + return -1; + } + int onGetTableTags(SkFontTableTag tags[]) const override; + size_t onGetTableData(SkFontTableTag, size_t offset, size_t length, void* data) const override; + sk_sp onCopyTableData(SkFontTableTag) const override; +}; + +class FontMemResourceTypeface : public LogFontTypeface { +public: + /** + * The created FontMemResourceTypeface takes ownership of fontMemResource. + */ + static sk_sp Make(const LOGFONT& lf, HANDLE fontMemResource) { + return sk_sp( + new FontMemResourceTypeface(get_style(lf), lf, fontMemResource)); + } + +protected: + void weak_dispose() const override { + RemoveFontMemResourceEx(fFontMemResource); + INHERITED::weak_dispose(); + } + +private: + /** + * Takes ownership of fontMemResource. + */ + FontMemResourceTypeface(const SkFontStyle& style, const LOGFONT& lf, HANDLE fontMemResource) + : LogFontTypeface(style, lf, true), fFontMemResource(fontMemResource) + { } + + HANDLE fFontMemResource; + + using INHERITED = LogFontTypeface; +}; + +static const LOGFONT& get_default_font() { + static LOGFONT gDefaultFont; + return gDefaultFont; +} + +static bool FindByLogFont(SkTypeface* face, void* ctx) { + LogFontTypeface* lface = static_cast(face); + const LOGFONT* lf = reinterpret_cast(ctx); + + return !memcmp(&lface->fLogFont, lf, sizeof(LOGFONT)); +} + +/** + * This is public. It first searches the cache, and if a match is not found, + * it creates a new face. + */ +SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT& origLF) { + LOGFONT lf = origLF; + make_canonical(&lf); + sk_sp face = SkTypefaceCache::FindByProcAndRef(FindByLogFont, &lf); + if (!face) { + face = LogFontTypeface::Make(lf); + SkTypefaceCache::Add(face); + } + return face.release(); +} + +/*** + * This guy is public. + */ +SkTypeface* SkCreateTypefaceFromDWriteFont(IDWriteFactory* aFactory, + IDWriteFontFace* aFontFace, + SkFontStyle aStyle, + int aRenderingMode, + float aGamma, + float aContrast, + float aClearTypeLevel) +{ + return DWriteFontTypeface::Create(aFactory, aFontFace, aStyle, + (DWRITE_RENDERING_MODE)aRenderingMode, + aGamma, aContrast, aClearTypeLevel); +} + +/** + * The created SkTypeface takes ownership of fontMemResource. + */ +sk_sp SkCreateFontMemResourceTypefaceFromLOGFONT(const LOGFONT& origLF, HANDLE fontMemResource) { + LOGFONT lf = origLF; + make_canonical(&lf); + // We'll never get a cache hit, so no point in putting this in SkTypefaceCache. + return FontMemResourceTypeface::Make(lf, fontMemResource); +} + +/** + * This is public + */ +void SkLOGFONTFromTypeface(const SkTypeface* face, LOGFONT* lf) { + if (nullptr == face) { + *lf = get_default_font(); + } else { + *lf = static_cast(face)->fLogFont; + } +} + +// Construct Glyph to Unicode table. +// Unicode code points that require conjugate pairs in utf16 are not +// supported. +// TODO(arthurhsu): Add support for conjugate pairs. It looks like that may +// require parsing the TTF cmap table (platform 4, encoding 12) directly instead +// of calling GetFontUnicodeRange(). +static void populate_glyph_to_unicode(HDC fontHdc, const unsigned glyphCount, + SkUnichar* glyphToUnicode) { + sk_bzero(glyphToUnicode, sizeof(SkUnichar) * glyphCount); + DWORD glyphSetBufferSize = GetFontUnicodeRanges(fontHdc, nullptr); + if (!glyphSetBufferSize) { + return; + } + + std::unique_ptr glyphSetBuffer(new BYTE[glyphSetBufferSize]); + GLYPHSET* glyphSet = + reinterpret_cast(glyphSetBuffer.get()); + if (GetFontUnicodeRanges(fontHdc, glyphSet) != glyphSetBufferSize) { + return; + } + + for (DWORD i = 0; i < glyphSet->cRanges; ++i) { + // There is no guarantee that within a Unicode range, the corresponding + // glyph id in a font file are continuous. So, even if we have ranges, + // we can't just use the first and last entry of the range to compute + // result. We need to enumerate them one by one. + int count = glyphSet->ranges[i].cGlyphs; + AutoTArray chars(count + 1); + chars[count] = 0; // termintate string + AutoTArray glyph(count); + for (USHORT j = 0; j < count; ++j) { + chars[j] = glyphSet->ranges[i].wcLow + j; + } + GetGlyphIndicesW(fontHdc, chars.get(), count, glyph.get(), + GGI_MARK_NONEXISTING_GLYPHS); + // If the glyph ID is valid, and the glyph is not mapped, then we will + // fill in the char id into the vector. If the glyph is mapped already, + // skip it. + // TODO(arthurhsu): better improve this. e.g. Get all used char ids from + // font cache, then generate this mapping table from there. It's + // unlikely to have collisions since glyph reuse happens mostly for + // different Unicode pages. + for (USHORT j = 0; j < count; ++j) { + if (glyph[j] != 0xFFFF && glyph[j] < glyphCount && glyphToUnicode[glyph[j]] == 0) { + glyphToUnicode[glyph[j]] = chars[j]; + } + } + } +} + +////////////////////////////////////////////////////////////////////////////////////// + +static int alignTo32(int n) { + return (n + 31) & ~31; +} + +struct MyBitmapInfo : public BITMAPINFO { + RGBQUAD fMoreSpaceForColors[1]; +}; + +class HDCOffscreen { +public: + HDCOffscreen() = default; + + ~HDCOffscreen() { + if (fDC) { + ::SelectObject(fDC, fSavefont); + ::DeleteDC(fDC); + } + if (fBM) { + DeleteObject(fBM); + } + } + + void init(HFONT font, const XFORM& xform) { + fFont = font; + fXform = xform; + } + + const void* draw(const SkGlyph&, bool isBW, size_t* srcRBPtr); + +private: + HDC fDC{nullptr}; + HFONT fSavefont{nullptr}; + HBITMAP fBM{nullptr}; + HFONT fFont{nullptr}; + XFORM fXform{1, 0, 0, 1, 0, 0}; + void* fBits{nullptr}; // points into fBM + int fWidth{0}; + int fHeight{0}; + bool fIsBW{false}; +}; + +const void* HDCOffscreen::draw(const SkGlyph& glyph, bool isBW, + size_t* srcRBPtr) { + // Can we share the scalercontext's fDDC, so we don't need to create + // a separate fDC here? + if (nullptr == fDC) { + fDC = CreateCompatibleDC(0); + if (nullptr == fDC) { + return nullptr; + } + SetGraphicsMode(fDC, GM_ADVANCED); + SetBkMode(fDC, TRANSPARENT); + SetTextAlign(fDC, TA_LEFT | TA_BASELINE); + fSavefont = (HFONT)SelectObject(fDC, fFont); + + COLORREF color = 0x00FFFFFF; + SkDEBUGCODE(COLORREF prev =) SetTextColor(fDC, color); + SkASSERT(prev != CLR_INVALID); + } + + if (fBM && (fIsBW != isBW || fWidth < glyph.width() || fHeight < glyph.height())) { + DeleteObject(fBM); + fBM = nullptr; + } + fIsBW = isBW; + + fWidth = std::max(fWidth, glyph.width()); + fHeight = std::max(fHeight, glyph.height()); + + int biWidth = isBW ? alignTo32(fWidth) : fWidth; + + if (nullptr == fBM) { + MyBitmapInfo info; + sk_bzero(&info, sizeof(info)); + if (isBW) { + RGBQUAD blackQuad = { 0, 0, 0, 0 }; + RGBQUAD whiteQuad = { 0xFF, 0xFF, 0xFF, 0 }; + info.bmiColors[0] = blackQuad; + info.bmiColors[1] = whiteQuad; + } + info.bmiHeader.biSize = sizeof(info.bmiHeader); + info.bmiHeader.biWidth = biWidth; + info.bmiHeader.biHeight = fHeight; + info.bmiHeader.biPlanes = 1; + info.bmiHeader.biBitCount = isBW ? 1 : 32; + info.bmiHeader.biCompression = BI_RGB; + if (isBW) { + info.bmiHeader.biClrUsed = 2; + } + fBM = CreateDIBSection(fDC, &info, DIB_RGB_COLORS, &fBits, 0, 0); + if (nullptr == fBM) { + return nullptr; + } + SelectObject(fDC, fBM); + } + + // erase + size_t srcRB = isBW ? (biWidth >> 3) : (fWidth << 2); + size_t size = fHeight * srcRB; + memset(fBits, 0, size); + + XFORM xform = fXform; + xform.eDx = (float)-glyph.left(); + xform.eDy = (float)-glyph.top(); + SetWorldTransform(fDC, &xform); + + uint16_t glyphID = glyph.getGlyphID(); + BOOL ret = ExtTextOutW(fDC, 0, 0, ETO_GLYPH_INDEX, nullptr, reinterpret_cast(&glyphID), + 1, nullptr); + GdiFlush(); + if (0 == ret) { + return nullptr; + } + *srcRBPtr = srcRB; + // offset to the start of the image + return (const char*)fBits + (fHeight - glyph.height()) * srcRB; +} + +////////////////////////////////////////////////////////////////////////////// +#define BUFFERSIZE (1 << 13) + +class SkScalerContext_GDI : public SkScalerContext { +public: + SkScalerContext_GDI(sk_sp, + const SkScalerContextEffects&, + const SkDescriptor* desc); + ~SkScalerContext_GDI() override; + + // Returns true if the constructor was able to complete all of its + // initializations (which may include calling GDI). + bool isValid() const; + +protected: + bool generateAdvance(SkGlyph* glyph) override; + void generateMetrics(SkGlyph* glyph, SkArenaAlloc*) override; + void generateImage(const SkGlyph& glyph) override; + bool generatePath(const SkGlyph& glyph, SkPath* path) override; + void generateFontMetrics(SkFontMetrics*) override; + +private: + DWORD getGDIGlyphPath(SkGlyphID glyph, UINT flags, + AutoSTMalloc* glyphbuf); + template + static void RGBToA8(const SkGdiRGB* SK_RESTRICT src, size_t srcRB, + const SkGlyph& glyph, const uint8_t* table8); + + template + static void RGBToLcd16(const SkGdiRGB* SK_RESTRICT src, size_t srcRB, const SkGlyph& glyph, + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB); + + HDCOffscreen fOffscreen; + /** fGsA is the non-rotational part of total matrix without the text height scale. + * Used to find the magnitude of advances. + */ + MAT2 fGsA; + /** The total matrix without the textSize. */ + MAT2 fMat22; + /** Scales font to EM size. */ + MAT2 fHighResMat22; + HDC fDDC; + HFONT fSavefont; + HFONT fFont; + SCRIPT_CACHE fSC; + + /** The total matrix which also removes EM scale. */ + SkMatrix fHiResMatrix; + /** fG_inv is the inverse of the rotational part of the total matrix. + * Used to set the direction of advances. + */ + SkMatrix fG_inv; + enum Type { + kTrueType_Type, kBitmap_Type, kLine_Type + } fType; + TEXTMETRIC fTM; +}; + +static FIXED SkFloatToFIXED(float x) { + return SkFixedToFIXED(SkFloatToFixed(x)); +} + +static inline float SkFIXEDToFloat(FIXED x) { + return SkFixedToFloat(SkFIXEDToFixed(x)); +} + +static BYTE compute_quality(const SkScalerContextRec& rec) { + switch (rec.fMaskFormat) { + case SkMask::kBW_Format: + return NONANTIALIASED_QUALITY; + case SkMask::kLCD16_Format: + return CLEARTYPE_QUALITY; + default: + if (rec.fFlags & SkScalerContext::kGenA8FromLCD_Flag) { + return CLEARTYPE_QUALITY; + } else { + return ANTIALIASED_QUALITY; + } + } +} + +SkScalerContext_GDI::SkScalerContext_GDI(sk_sp rawTypeface, + const SkScalerContextEffects& effects, + const SkDescriptor* desc) + : SkScalerContext(std::move(rawTypeface), effects, desc) + , fDDC(nullptr) + , fSavefont(nullptr) + , fFont(nullptr) + , fSC(nullptr) +{ + LogFontTypeface* typeface = static_cast(this->getTypeface()); + + fDDC = ::CreateCompatibleDC(nullptr); + if (!fDDC) { + return; + } + SetGraphicsMode(fDDC, GM_ADVANCED); + SetBkMode(fDDC, TRANSPARENT); + + // When GDI hinting, remove the entire Y scale from sA and GsA. (Prevents 'linear' metrics.) + // When not hinting, remove only the integer Y scale from sA and GsA. (Applied by GDI.) + SkScalerContextRec::PreMatrixScale scaleConstraints = + (fRec.getHinting() == SkFontHinting::kNone || fRec.getHinting() == SkFontHinting::kSlight) + ? SkScalerContextRec::PreMatrixScale::kVerticalInteger + : SkScalerContextRec::PreMatrixScale::kVertical; + SkVector scale; + SkMatrix sA; + SkMatrix GsA; + SkMatrix A; + fRec.computeMatrices(scaleConstraints, &scale, &sA, &GsA, &fG_inv, &A); + + fGsA.eM11 = SkScalarToFIXED(GsA.get(SkMatrix::kMScaleX)); + fGsA.eM12 = SkScalarToFIXED(-GsA.get(SkMatrix::kMSkewY)); // This should be ~0. + fGsA.eM21 = SkScalarToFIXED(-GsA.get(SkMatrix::kMSkewX)); + fGsA.eM22 = SkScalarToFIXED(GsA.get(SkMatrix::kMScaleY)); + + // When not hinting, scale was computed with kVerticalInteger, so is already an integer. + // The sA and GsA transforms will be used to create 'linear' metrics. + + // When hinting, scale was computed with kVertical, stating that our port can handle + // non-integer scales. This is done so that sA and GsA are computed without any 'residual' + // scale in them, preventing 'linear' metrics. However, GDI cannot actually handle non-integer + // scales so we need to round in this case. This is fine, since all of the scale has been + // removed from sA and GsA, so GDI will be handling the scale completely. + SkScalar gdiTextSize = SkScalarRoundToScalar(scale.fY); + + // GDI will not accept a size of zero, so round the range [0, 1] to 1. + // If the size was non-zero, the scale factors will also be non-zero and 1px tall text is drawn. + // If the size actually was zero, the scale factors will also be zero, so GDI will draw nothing. + if (gdiTextSize == 0) { + gdiTextSize = SK_Scalar1; + } + + LOGFONT lf = typeface->fLogFont; + lf.lfHeight = -SkScalarTruncToInt(gdiTextSize); + lf.lfQuality = compute_quality(fRec); + fFont = CreateFontIndirect(&lf); + if (!fFont) { + return; + } + + fSavefont = (HFONT)SelectObject(fDDC, fFont); + + if (0 == GetTextMetrics(fDDC, &fTM)) { + call_ensure_accessible(lf); + if (0 == GetTextMetrics(fDDC, &fTM)) { + fTM.tmPitchAndFamily = TMPF_TRUETYPE; + } + } + + XFORM xform; + if (fTM.tmPitchAndFamily & TMPF_VECTOR) { + // Used a logfont on a memory context, should never get a device font. + // Therefore all TMPF_DEVICE will be PostScript fonts. + + // If TMPF_VECTOR is set, one of TMPF_TRUETYPE or TMPF_DEVICE means that + // we have an outline font. Otherwise we have a vector FON, which is + // scalable, but not an outline font. + // This was determined by testing with Type1 PFM/PFB and + // OpenTypeCFF OTF, as well as looking at Wine bugs and sources. + if (fTM.tmPitchAndFamily & (TMPF_TRUETYPE | TMPF_DEVICE)) { + // Truetype or PostScript. + fType = SkScalerContext_GDI::kTrueType_Type; + } else { + // Stroked FON. + fType = SkScalerContext_GDI::kLine_Type; + } + + // fPost2x2 is column-major, left handed (y down). + // XFORM 2x2 is row-major, left handed (y down). + xform.eM11 = SkScalarToFloat(sA.get(SkMatrix::kMScaleX)); + xform.eM12 = SkScalarToFloat(sA.get(SkMatrix::kMSkewY)); + xform.eM21 = SkScalarToFloat(sA.get(SkMatrix::kMSkewX)); + xform.eM22 = SkScalarToFloat(sA.get(SkMatrix::kMScaleY)); + xform.eDx = 0; + xform.eDy = 0; + + // MAT2 is row major, right handed (y up). + fMat22.eM11 = SkFloatToFIXED(xform.eM11); + fMat22.eM12 = SkFloatToFIXED(-xform.eM12); + fMat22.eM21 = SkFloatToFIXED(-xform.eM21); + fMat22.eM22 = SkFloatToFIXED(xform.eM22); + + if (needToRenderWithSkia(fRec)) { + this->forceGenerateImageFromPath(); + } + + // Create a hires matrix if we need linear metrics. + if (this->isLinearMetrics()) { + OUTLINETEXTMETRIC otm; + UINT success = GetOutlineTextMetrics(fDDC, sizeof(otm), &otm); + if (0 == success) { + call_ensure_accessible(lf); + success = GetOutlineTextMetrics(fDDC, sizeof(otm), &otm); + } + if (0 != success) { + SkScalar upem = SkIntToScalar(otm.otmEMSquare); + + SkScalar gdiTextSizeToEMScale = upem / gdiTextSize; + fHighResMat22.eM11 = SkScalarToFIXED(gdiTextSizeToEMScale); + fHighResMat22.eM12 = SkScalarToFIXED(0); + fHighResMat22.eM21 = SkScalarToFIXED(0); + fHighResMat22.eM22 = SkScalarToFIXED(gdiTextSizeToEMScale); + + SkScalar removeEMScale = SkScalarInvert(upem); + fHiResMatrix = A; + fHiResMatrix.preScale(removeEMScale, removeEMScale); + } + } + + } else { + // Assume bitmap + fType = SkScalerContext_GDI::kBitmap_Type; + + xform.eM11 = 1.0f; + xform.eM12 = 0.0f; + xform.eM21 = 0.0f; + xform.eM22 = 1.0f; + xform.eDx = 0.0f; + xform.eDy = 0.0f; + + // fPost2x2 is column-major, left handed (y down). + // MAT2 is row major, right handed (y up). + fMat22.eM11 = SkScalarToFIXED(fRec.fPost2x2[0][0]); + fMat22.eM12 = SkScalarToFIXED(-fRec.fPost2x2[1][0]); + fMat22.eM21 = SkScalarToFIXED(-fRec.fPost2x2[0][1]); + fMat22.eM22 = SkScalarToFIXED(fRec.fPost2x2[1][1]); + } + + fOffscreen.init(fFont, xform); +} + +SkScalerContext_GDI::~SkScalerContext_GDI() { + if (fDDC) { + ::SelectObject(fDDC, fSavefont); + ::DeleteDC(fDDC); + } + if (fFont) { + ::DeleteObject(fFont); + } + if (fSC) { + ::ScriptFreeCache(&fSC); + } +} + +bool SkScalerContext_GDI::isValid() const { + return fDDC && fFont; +} + +bool SkScalerContext_GDI::generateAdvance(SkGlyph* glyph) { + return false; +} + +void SkScalerContext_GDI::generateMetrics(SkGlyph* glyph, SkArenaAlloc* alloc) { + SkASSERT(fDDC); + + glyph->fMaskFormat = fRec.fMaskFormat; + + if (fType == SkScalerContext_GDI::kBitmap_Type || fType == SkScalerContext_GDI::kLine_Type) { + SIZE size; + WORD glyphs = glyph->getGlyphID(); + if (0 == GetTextExtentPointI(fDDC, &glyphs, 1, &size)) { + glyph->fWidth = SkToS16(fTM.tmMaxCharWidth); + glyph->fHeight = SkToS16(fTM.tmHeight); + } else { + glyph->fWidth = SkToS16(size.cx); + glyph->fHeight = SkToS16(size.cy); + } + + glyph->fTop = SkToS16(-fTM.tmAscent); + // Bitmap FON cannot underhang, but vector FON may. + // There appears no means of determining underhang of vector FON. + glyph->fLeft = SkToS16(0); + glyph->fAdvanceX = glyph->width(); + glyph->fAdvanceY = 0; + + // Vector FON will transform nicely, but bitmap FON do not. + if (fType == SkScalerContext_GDI::kLine_Type) { + SkRect bounds = SkRect::MakeXYWH(glyph->fLeft, glyph->fTop, + glyph->width(), glyph->height()); + SkMatrix m; + m.setAll(SkFIXEDToScalar(fMat22.eM11), -SkFIXEDToScalar(fMat22.eM21), 0, + -SkFIXEDToScalar(fMat22.eM12), SkFIXEDToScalar(fMat22.eM22), 0, + 0, 0, 1); + m.mapRect(&bounds); + bounds.roundOut(&bounds); + glyph->fLeft = SkScalarTruncToInt(bounds.fLeft); + glyph->fTop = SkScalarTruncToInt(bounds.fTop); + glyph->fWidth = SkScalarTruncToInt(bounds.width()); + glyph->fHeight = SkScalarTruncToInt(bounds.height()); + } + + // Apply matrix to advance. + glyph->fAdvanceY = -SkFIXEDToFloat(fMat22.eM12) * glyph->fAdvanceX; + glyph->fAdvanceX *= SkFIXEDToFloat(fMat22.eM11); + + // These do not have an outline path at all. + glyph->setPath(alloc, nullptr, false); + + return; + } + + UINT glyphId = glyph->getGlyphID(); + + GLYPHMETRICS gm; + sk_bzero(&gm, sizeof(gm)); + + DWORD status = GetGlyphOutlineW(fDDC, glyphId, GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, nullptr, &fMat22); + if (GDI_ERROR == status) { + LogFontTypeface::EnsureAccessible(this->getTypeface()); + status = GetGlyphOutlineW(fDDC, glyphId, GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, nullptr, &fMat22); + if (GDI_ERROR == status) { + glyph->zeroMetrics(); + return; + } + } + + bool empty = false; + // The black box is either the embedded bitmap size or the outline extent. + // It is 1x1 if nothing is to be drawn, but will also be 1x1 if something very small + // is to be drawn, like a '.'. We need to outset '.' but do not wish to outset ' '. + if (1 == gm.gmBlackBoxX && 1 == gm.gmBlackBoxY) { + // If GetGlyphOutline with GGO_NATIVE returns 0, we know there was no outline. + DWORD bufferSize = GetGlyphOutlineW(fDDC, glyphId, GGO_NATIVE | GGO_GLYPH_INDEX, &gm, 0, nullptr, &fMat22); + empty = (0 == bufferSize); + } + + glyph->fTop = SkToS16(-gm.gmptGlyphOrigin.y); + glyph->fLeft = SkToS16(gm.gmptGlyphOrigin.x); + if (empty) { + glyph->fWidth = 0; + glyph->fHeight = 0; + } else { + // Outset, since the image may bleed out of the black box. + // For embedded bitmaps the black box should be exact. + // For outlines we need to outset by 1 in all directions for bleed. + // For ClearType we need to outset by 2 for bleed. + glyph->fWidth = gm.gmBlackBoxX + 4; + glyph->fHeight = gm.gmBlackBoxY + 4; + glyph->fTop -= 2; + glyph->fLeft -= 2; + } + // TODO(benjaminwagner): What is the type of gm.gmCellInc[XY]? + glyph->fAdvanceX = (float)((int)gm.gmCellIncX); + glyph->fAdvanceY = (float)((int)gm.gmCellIncY); + + if ((fTM.tmPitchAndFamily & TMPF_VECTOR) && this->isLinearMetrics()) { + sk_bzero(&gm, sizeof(gm)); + status = GetGlyphOutlineW(fDDC, glyphId, GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, nullptr, &fHighResMat22); + if (GDI_ERROR != status) { + SkPoint advance; + fHiResMatrix.mapXY(SkIntToScalar(gm.gmCellIncX), SkIntToScalar(gm.gmCellIncY), &advance); + glyph->fAdvanceX = SkScalarToFloat(advance.fX); + glyph->fAdvanceY = SkScalarToFloat(advance.fY); + } + } else if (!isAxisAligned(this->fRec)) { + status = GetGlyphOutlineW(fDDC, glyphId, GGO_METRICS | GGO_GLYPH_INDEX, &gm, 0, nullptr, &fGsA); + if (GDI_ERROR != status) { + SkPoint advance; + fG_inv.mapXY(SkIntToScalar(gm.gmCellIncX), SkIntToScalar(gm.gmCellIncY), &advance); + glyph->fAdvanceX = SkScalarToFloat(advance.fX); + glyph->fAdvanceY = SkScalarToFloat(advance.fY); + } + } +} + +static const MAT2 gMat2Identity = {{0, 1}, {0, 0}, {0, 0}, {0, 1}}; +void SkScalerContext_GDI::generateFontMetrics(SkFontMetrics* metrics) { + if (nullptr == metrics) { + return; + } + sk_bzero(metrics, sizeof(*metrics)); + + SkASSERT(fDDC); + +#ifndef SK_GDI_ALWAYS_USE_TEXTMETRICS_FOR_FONT_METRICS + if (fType == SkScalerContext_GDI::kBitmap_Type || fType == SkScalerContext_GDI::kLine_Type) { +#endif + metrics->fTop = SkIntToScalar(-fTM.tmAscent); + metrics->fAscent = SkIntToScalar(-fTM.tmAscent); + metrics->fDescent = SkIntToScalar(fTM.tmDescent); + metrics->fBottom = SkIntToScalar(fTM.tmDescent); + metrics->fLeading = SkIntToScalar(fTM.tmExternalLeading); + metrics->fAvgCharWidth = SkIntToScalar(fTM.tmAveCharWidth); + metrics->fMaxCharWidth = SkIntToScalar(fTM.tmMaxCharWidth); + metrics->fXMin = 0; + metrics->fXMax = metrics->fMaxCharWidth; + //metrics->fXHeight = 0; +#ifndef SK_GDI_ALWAYS_USE_TEXTMETRICS_FOR_FONT_METRICS + return; + } +#endif + + OUTLINETEXTMETRIC otm; + + uint32_t ret = GetOutlineTextMetrics(fDDC, sizeof(otm), &otm); + if (0 == ret) { + LogFontTypeface::EnsureAccessible(this->getTypeface()); + ret = GetOutlineTextMetrics(fDDC, sizeof(otm), &otm); + } + if (0 == ret) { + return; + } + +#ifndef SK_GDI_ALWAYS_USE_TEXTMETRICS_FOR_FONT_METRICS + metrics->fTop = SkIntToScalar(-otm.otmrcFontBox.top); + metrics->fAscent = SkIntToScalar(-otm.otmAscent); + metrics->fDescent = SkIntToScalar(-otm.otmDescent); + metrics->fBottom = SkIntToScalar(-otm.otmrcFontBox.bottom); + metrics->fLeading = SkIntToScalar(otm.otmLineGap); + metrics->fAvgCharWidth = SkIntToScalar(otm.otmTextMetrics.tmAveCharWidth); + metrics->fMaxCharWidth = SkIntToScalar(otm.otmTextMetrics.tmMaxCharWidth); + metrics->fXMin = SkIntToScalar(otm.otmrcFontBox.left); + metrics->fXMax = SkIntToScalar(otm.otmrcFontBox.right); +#endif + metrics->fUnderlineThickness = SkIntToScalar(otm.otmsUnderscoreSize); + metrics->fUnderlinePosition = -SkIntToScalar(otm.otmsUnderscorePosition); + + metrics->fFlags |= SkFontMetrics::kUnderlineThicknessIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kUnderlinePositionIsValid_Flag; + + metrics->fXHeight = SkIntToScalar(otm.otmsXHeight); + GLYPHMETRICS gm; + sk_bzero(&gm, sizeof(gm)); + DWORD len = GetGlyphOutlineW(fDDC, 'x', GGO_METRICS, &gm, 0, nullptr, &gMat2Identity); + if (len != GDI_ERROR && gm.gmBlackBoxY > 0) { + metrics->fXHeight = SkIntToScalar(gm.gmBlackBoxY); + } +} + +//////////////////////////////////////////////////////////////////////////////////////// + +static void build_power_table(uint8_t table[], float ee) { + for (int i = 0; i < 256; i++) { + float x = i / 255.f; + x = sk_float_pow(x, ee); + int xx = SkScalarRoundToInt(x * 255); + table[i] = SkToU8(xx); + } +} + +/** + * This will invert the gamma applied by GDI (gray-scale antialiased), so we + * can get linear values. + * + * GDI grayscale appears to use a hard-coded gamma of 2.3. + * + * GDI grayscale appears to draw using the black and white rasterizer at four + * times the size and then downsamples to compute the coverage mask. As a + * result there are only seventeen total grays. This lack of fidelity means + * that shifting into other color spaces is imprecise. + */ +static const uint8_t* getInverseGammaTableGDI() { + static SkOnce once; + static uint8_t gTableGdi[256]; + once([]{ + build_power_table(gTableGdi, 2.3f); + }); + return gTableGdi; +} + +/** + * This will invert the gamma applied by GDI ClearType, so we can get linear + * values. + * + * GDI ClearType uses SPI_GETFONTSMOOTHINGCONTRAST / 1000 as the gamma value. + * If this value is not specified, the default is a gamma of 1.4. + */ +static const uint8_t* getInverseGammaTableClearType() { + static SkOnce once; + static uint8_t gTableClearType[256]; + once([]{ + UINT level = 0; + if (!SystemParametersInfo(SPI_GETFONTSMOOTHINGCONTRAST, 0, &level, 0) || !level) { + // can't get the data, so use a default + level = 1400; + } + build_power_table(gTableClearType, level / 1000.0f); + }); + return gTableClearType; +} + +#include "include/private/SkColorData.h" + +//Cannot assume that the input rgb is gray due to possible setting of kGenA8FromLCD_Flag. +template +static inline uint8_t rgb_to_a8(SkGdiRGB rgb, const uint8_t* table8) { + U8CPU r = (rgb >> 16) & 0xFF; + U8CPU g = (rgb >> 8) & 0xFF; + U8CPU b = (rgb >> 0) & 0xFF; + return sk_apply_lut_if(SkComputeLuminance(r, g, b), table8); +} + +template +static inline uint16_t rgb_to_lcd16(SkGdiRGB rgb, const uint8_t* tableR, + const uint8_t* tableG, + const uint8_t* tableB) { + U8CPU r = sk_apply_lut_if((rgb >> 16) & 0xFF, tableR); + U8CPU g = sk_apply_lut_if((rgb >> 8) & 0xFF, tableG); + U8CPU b = sk_apply_lut_if((rgb >> 0) & 0xFF, tableB); + if constexpr (kSkShowTextBlitCoverage) { + r = std::max(r, 10u); + g = std::max(g, 10u); + b = std::max(b, 10u); + } + return SkPack888ToRGB16(r, g, b); +} + +template +void SkScalerContext_GDI::RGBToA8(const SkGdiRGB* SK_RESTRICT src, size_t srcRB, + const SkGlyph& glyph, const uint8_t* table8) { + const size_t dstRB = glyph.rowBytes(); + const int width = glyph.width(); + uint8_t* SK_RESTRICT dst = (uint8_t*)((char*)glyph.fImage + (glyph.height() - 1) * dstRB); + + for (int y = 0; y < glyph.fHeight; y++) { + for (int i = 0; i < width; i++) { + dst[i] = rgb_to_a8(src[i], table8); + if constexpr (kSkShowTextBlitCoverage) { + dst[i] = std::max(dst[i], 10u); + } + } + src = SkTAddOffset(src, srcRB); + dst -= dstRB; + } +} + +template +void SkScalerContext_GDI::RGBToLcd16( + const SkGdiRGB* SK_RESTRICT src, size_t srcRB, const SkGlyph& glyph, + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) { + const size_t dstRB = glyph.rowBytes(); + const int width = glyph.width(); + uint16_t* SK_RESTRICT dst = (uint16_t*)((char*)glyph.fImage + (glyph.height() - 1) * dstRB); + + for (int y = 0; y < glyph.fHeight; y++) { + for (int i = 0; i < width; i++) { + dst[i] = rgb_to_lcd16(src[i], tableR, tableG, tableB); + } + src = SkTAddOffset(src, srcRB); + dst = (uint16_t*)((char*)dst - dstRB); + } +} + +void SkScalerContext_GDI::generateImage(const SkGlyph& glyph) { + SkASSERT(fDDC); + + const bool isBW = SkMask::kBW_Format == fRec.fMaskFormat; + const bool isAA = !isLCD(fRec); + + size_t srcRB; + const void* bits = fOffscreen.draw(glyph, isBW, &srcRB); + if (nullptr == bits) { + LogFontTypeface::EnsureAccessible(this->getTypeface()); + bits = fOffscreen.draw(glyph, isBW, &srcRB); + if (nullptr == bits) { + sk_bzero(glyph.fImage, glyph.imageSize()); + return; + } + } + + if (!isBW) { + const uint8_t* table; + //The offscreen contains a GDI blit if isAA and kGenA8FromLCD_Flag is not set. + //Otherwise the offscreen contains a ClearType blit. + if (isAA && !(fRec.fFlags & SkScalerContext::kGenA8FromLCD_Flag)) { + table = getInverseGammaTableGDI(); + } else { + table = getInverseGammaTableClearType(); + } + //Note that the following cannot really be integrated into the + //pre-blend, since we may not be applying the pre-blend; when we aren't + //applying the pre-blend it means that a filter wants linear anyway. + //Other code may also be applying the pre-blend, so we'd need another + //one with this and one without. + SkGdiRGB* addr = (SkGdiRGB*)bits; + for (int y = 0; y < glyph.fHeight; ++y) { + for (int x = 0; x < glyph.width(); ++x) { + int r = (addr[x] >> 16) & 0xFF; + int g = (addr[x] >> 8) & 0xFF; + int b = (addr[x] >> 0) & 0xFF; + addr[x] = (table[r] << 16) | (table[g] << 8) | table[b]; + } + addr = SkTAddOffset(addr, srcRB); + } + } + + size_t dstRB = glyph.rowBytes(); + if (isBW) { + const uint8_t* src = (const uint8_t*)bits; + uint8_t* dst = (uint8_t*)((char*)glyph.fImage + (glyph.fHeight - 1) * dstRB); + for (int y = 0; y < glyph.fHeight; y++) { + memcpy(dst, src, dstRB); + src += srcRB; + dst -= dstRB; + } + if constexpr (kSkShowTextBlitCoverage) { + if (glyph.width() > 0 && glyph.fHeight > 0) { + int bitCount = glyph.width() & 7; + uint8_t* first = (uint8_t*)glyph.fImage; + uint8_t* last = (uint8_t*)((char*)glyph.fImage + glyph.height() * dstRB - 1); + *first |= 1 << 7; + *last |= bitCount == 0 ? 1 : 1 << (8 - bitCount); + } + } + } else if (isAA) { + // since the caller may require A8 for maskfilters, we can't check for BW + // ... until we have the caller tell us that explicitly + const SkGdiRGB* src = (const SkGdiRGB*)bits; + if (fPreBlend.isApplicable()) { + RGBToA8(src, srcRB, glyph, fPreBlend.fG); + } else { + RGBToA8(src, srcRB, glyph, fPreBlend.fG); + } + } else { // LCD16 + const SkGdiRGB* src = (const SkGdiRGB*)bits; + SkASSERT(SkMask::kLCD16_Format == glyph.fMaskFormat); + if (fPreBlend.isApplicable()) { + RGBToLcd16(src, srcRB, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); + } else { + RGBToLcd16(src, srcRB, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); + } + } +} + +namespace { + +class GDIGlyphbufferPointIter { +public: + GDIGlyphbufferPointIter(const uint8_t* glyphbuf, DWORD total_size) + : fHeaderIter(glyphbuf, total_size), fCurveIter(), fPointIter() + { } + + POINTFX const * next() { +nextHeader: + if (!fCurveIter.isSet()) { + const TTPOLYGONHEADER* header = fHeaderIter.next(); + if (nullptr == header) { + return nullptr; + } + fCurveIter.set(header); + const TTPOLYCURVE* curve = fCurveIter.next(); + if (nullptr == curve) { + return nullptr; + } + fPointIter.set(curve); + return &header->pfxStart; + } + + const POINTFX* nextPoint = fPointIter.next(); + if (nullptr == nextPoint) { + const TTPOLYCURVE* curve = fCurveIter.next(); + if (nullptr == curve) { + fCurveIter.set(); + goto nextHeader; + } else { + fPointIter.set(curve); + } + nextPoint = fPointIter.next(); + } + return nextPoint; + } + + WORD currentCurveType() { + return fPointIter.fCurveType; + } + +private: + /** Iterates over all of the polygon headers in a glyphbuf. */ + class GDIPolygonHeaderIter { + public: + GDIPolygonHeaderIter(const uint8_t* glyphbuf, DWORD total_size) + : fCurPolygon(reinterpret_cast(glyphbuf)) + , fEndPolygon(SkTAddOffset(glyphbuf, total_size)) + { } + + const TTPOLYGONHEADER* next() { + if (fCurPolygon >= fEndPolygon) { + return nullptr; + } + const TTPOLYGONHEADER* thisPolygon = fCurPolygon; + fCurPolygon = SkTAddOffset(fCurPolygon, fCurPolygon->cb); + return thisPolygon; + } + private: + const TTPOLYGONHEADER* fCurPolygon; + const TTPOLYGONHEADER* fEndPolygon; + }; + + /** Iterates over all of the polygon curves in a polygon header. */ + class GDIPolygonCurveIter { + public: + GDIPolygonCurveIter() : fCurCurve(nullptr), fEndCurve(nullptr) { } + + GDIPolygonCurveIter(const TTPOLYGONHEADER* curPolygon) + : fCurCurve(SkTAddOffset(curPolygon, sizeof(TTPOLYGONHEADER))) + , fEndCurve(SkTAddOffset(curPolygon, curPolygon->cb)) + { } + + bool isSet() { return fCurCurve != nullptr; } + + void set(const TTPOLYGONHEADER* curPolygon) { + fCurCurve = SkTAddOffset(curPolygon, sizeof(TTPOLYGONHEADER)); + fEndCurve = SkTAddOffset(curPolygon, curPolygon->cb); + } + void set() { + fCurCurve = nullptr; + fEndCurve = nullptr; + } + + const TTPOLYCURVE* next() { + if (fCurCurve >= fEndCurve) { + return nullptr; + } + const TTPOLYCURVE* thisCurve = fCurCurve; + fCurCurve = SkTAddOffset(fCurCurve, size_of_TTPOLYCURVE(*fCurCurve)); + return thisCurve; + } + private: + size_t size_of_TTPOLYCURVE(const TTPOLYCURVE& curve) { + return 2*sizeof(WORD) + curve.cpfx*sizeof(POINTFX); + } + const TTPOLYCURVE* fCurCurve; + const TTPOLYCURVE* fEndCurve; + }; + + /** Iterates over all of the polygon points in a polygon curve. */ + class GDIPolygonCurvePointIter { + public: + GDIPolygonCurvePointIter() : fCurveType(0), fCurPoint(nullptr), fEndPoint(nullptr) { } + + GDIPolygonCurvePointIter(const TTPOLYCURVE* curPolygon) + : fCurveType(curPolygon->wType) + , fCurPoint(&curPolygon->apfx[0]) + , fEndPoint(&curPolygon->apfx[curPolygon->cpfx]) + { } + + bool isSet() { return fCurPoint != nullptr; } + + void set(const TTPOLYCURVE* curPolygon) { + fCurveType = curPolygon->wType; + fCurPoint = &curPolygon->apfx[0]; + fEndPoint = &curPolygon->apfx[curPolygon->cpfx]; + } + void set() { + fCurPoint = nullptr; + fEndPoint = nullptr; + } + + const POINTFX* next() { + if (fCurPoint >= fEndPoint) { + return nullptr; + } + const POINTFX* thisPoint = fCurPoint; + ++fCurPoint; + return thisPoint; + } + + WORD fCurveType; + private: + const POINTFX* fCurPoint; + const POINTFX* fEndPoint; + }; + + GDIPolygonHeaderIter fHeaderIter; + GDIPolygonCurveIter fCurveIter; + GDIPolygonCurvePointIter fPointIter; +}; + +class SkGDIGeometrySink { + SkPath* fPath; + bool fStarted = false; + POINTFX fCurrent; + + void goingTo(const POINTFX pt) { + if (!fStarted) { + fStarted = true; + fPath->moveTo( SkFIXEDToScalar(fCurrent.x), + -SkFIXEDToScalar(fCurrent.y)); + } + fCurrent = pt; + } + + bool currentIsNot(const POINTFX pt) { + return fCurrent.x.value != pt.x.value || fCurrent.x.fract != pt.x.fract || + fCurrent.y.value != pt.y.value || fCurrent.y.fract != pt.y.fract; + } + +public: + SkGDIGeometrySink(SkPath* path) : fPath(path) {} + void process(const uint8_t* glyphbuf, DWORD total_size); + + /** It is possible for the hinted and unhinted versions of the same path to have + * a different number of points due to GDI's handling of flipped points. + * If this is detected, this will return false. + */ + bool process(const uint8_t* glyphbuf, DWORD total_size, GDIGlyphbufferPointIter hintedYs); +}; + +void SkGDIGeometrySink::process(const uint8_t* glyphbuf, DWORD total_size) { + const uint8_t* cur_glyph = glyphbuf; + const uint8_t* end_glyph = glyphbuf + total_size; + + while (cur_glyph < end_glyph) { + const TTPOLYGONHEADER* th = (TTPOLYGONHEADER*)cur_glyph; + + const uint8_t* end_poly = cur_glyph + th->cb; + const uint8_t* cur_poly = cur_glyph + sizeof(TTPOLYGONHEADER); + + fStarted = false; + fCurrent = th->pfxStart; + + while (cur_poly < end_poly) { + const TTPOLYCURVE* pc = (const TTPOLYCURVE*)cur_poly; + const POINTFX* apfx = pc->apfx; + const WORD cpfx = pc->cpfx; + + if (pc->wType == TT_PRIM_LINE) { + for (uint16_t i = 0; i < cpfx; i++) { + POINTFX pnt_b = apfx[i]; + if (this->currentIsNot(pnt_b)) { + this->goingTo(pnt_b); + fPath->lineTo( SkFIXEDToScalar(pnt_b.x), + -SkFIXEDToScalar(pnt_b.y)); + } + } + } + + if (pc->wType == TT_PRIM_QSPLINE) { + for (uint16_t u = 0; u < cpfx - 1; u++) { // Walk through points in spline + POINTFX pnt_b = apfx[u]; // B is always the current point + POINTFX pnt_c = apfx[u+1]; + + if (u < cpfx - 2) { // If not on last spline, compute C + pnt_c.x = SkFixedToFIXED(SkFixedAve(SkFIXEDToFixed(pnt_b.x), + SkFIXEDToFixed(pnt_c.x))); + pnt_c.y = SkFixedToFIXED(SkFixedAve(SkFIXEDToFixed(pnt_b.y), + SkFIXEDToFixed(pnt_c.y))); + } + + + if (this->currentIsNot(pnt_b) || this->currentIsNot(pnt_c)) { + this->goingTo(pnt_c); + fPath->quadTo( SkFIXEDToScalar(pnt_b.x), + -SkFIXEDToScalar(pnt_b.y), + SkFIXEDToScalar(pnt_c.x), + -SkFIXEDToScalar(pnt_c.y)); + } + } + } + + // Advance past this TTPOLYCURVE. + cur_poly += sizeof(WORD) * 2 + sizeof(POINTFX) * cpfx; + } + cur_glyph += th->cb; + if (this->fStarted) { + fPath->close(); + } + } +} + +#define move_next_expected_hinted_point(iter, pElem) do {\ + pElem = iter.next(); \ + if (nullptr == pElem) return false; \ +} while(0) + +bool SkGDIGeometrySink::process(const uint8_t* glyphbuf, DWORD total_size, + GDIGlyphbufferPointIter hintedYs) { + const uint8_t* cur_glyph = glyphbuf; + const uint8_t* end_glyph = glyphbuf + total_size; + + POINTFX const * hintedPoint; + + while (cur_glyph < end_glyph) { + const TTPOLYGONHEADER* th = (TTPOLYGONHEADER*)cur_glyph; + + const uint8_t* end_poly = cur_glyph + th->cb; + const uint8_t* cur_poly = cur_glyph + sizeof(TTPOLYGONHEADER); + + move_next_expected_hinted_point(hintedYs, hintedPoint); + fStarted = false; + fCurrent = {th->pfxStart.x, hintedPoint->y}; + + while (cur_poly < end_poly) { + const TTPOLYCURVE* pc = (const TTPOLYCURVE*)cur_poly; + const POINTFX* apfx = pc->apfx; + const WORD cpfx = pc->cpfx; + + if (pc->wType == TT_PRIM_LINE) { + for (uint16_t i = 0; i < cpfx; i++) { + move_next_expected_hinted_point(hintedYs, hintedPoint); + POINTFX pnt_b = {apfx[i].x, hintedPoint->y}; + if (this->currentIsNot(pnt_b)) { + this->goingTo(pnt_b); + fPath->lineTo( SkFIXEDToScalar(pnt_b.x), + -SkFIXEDToScalar(pnt_b.y)); + } + } + } + + if (pc->wType == TT_PRIM_QSPLINE) { + POINTFX currentPoint = apfx[0]; + move_next_expected_hinted_point(hintedYs, hintedPoint); + // only take the hinted y if it wasn't flipped + if (hintedYs.currentCurveType() == TT_PRIM_QSPLINE) { + currentPoint.y = hintedPoint->y; + } + for (uint16_t u = 0; u < cpfx - 1; u++) { // Walk through points in spline + POINTFX pnt_b = currentPoint;//pc->apfx[u]; // B is always the current point + POINTFX pnt_c = apfx[u+1]; + move_next_expected_hinted_point(hintedYs, hintedPoint); + // only take the hinted y if it wasn't flipped + if (hintedYs.currentCurveType() == TT_PRIM_QSPLINE) { + pnt_c.y = hintedPoint->y; + } + currentPoint.x = pnt_c.x; + currentPoint.y = pnt_c.y; + + if (u < cpfx - 2) { // If not on last spline, compute C + pnt_c.x = SkFixedToFIXED(SkFixedAve(SkFIXEDToFixed(pnt_b.x), + SkFIXEDToFixed(pnt_c.x))); + pnt_c.y = SkFixedToFIXED(SkFixedAve(SkFIXEDToFixed(pnt_b.y), + SkFIXEDToFixed(pnt_c.y))); + } + + if (this->currentIsNot(pnt_b) || this->currentIsNot(pnt_c)) { + this->goingTo(pnt_c); + fPath->quadTo( SkFIXEDToScalar(pnt_b.x), + -SkFIXEDToScalar(pnt_b.y), + SkFIXEDToScalar(pnt_c.x), + -SkFIXEDToScalar(pnt_c.y)); + } + } + } + + // Advance past this TTPOLYCURVE. + cur_poly += sizeof(WORD) * 2 + sizeof(POINTFX) * cpfx; + } + cur_glyph += th->cb; + if (this->fStarted) { + fPath->close(); + } + } + return true; +} +} // namespace + +DWORD SkScalerContext_GDI::getGDIGlyphPath(SkGlyphID glyph, UINT flags, + AutoSTMalloc* glyphbuf) +{ + GLYPHMETRICS gm; + + DWORD total_size = GetGlyphOutlineW(fDDC, glyph, flags, &gm, BUFFERSIZE, glyphbuf->get(), &fMat22); + // Sometimes GetGlyphOutlineW returns a number larger than BUFFERSIZE even if BUFFERSIZE > 0. + // It has been verified that this does not involve a buffer overrun. + if (GDI_ERROR == total_size || total_size > BUFFERSIZE) { + // GDI_ERROR because the BUFFERSIZE was too small, or because the data was not accessible. + // When the data is not accessable GetGlyphOutlineW fails rather quickly, + // so just try to get the size. If that fails then ensure the data is accessible. + total_size = GetGlyphOutlineW(fDDC, glyph, flags, &gm, 0, nullptr, &fMat22); + if (GDI_ERROR == total_size) { + LogFontTypeface::EnsureAccessible(this->getTypeface()); + total_size = GetGlyphOutlineW(fDDC, glyph, flags, &gm, 0, nullptr, &fMat22); + if (GDI_ERROR == total_size) { + // GetGlyphOutlineW is known to fail for some characters, such as spaces. + // In these cases, just return that the glyph does not have a shape. + return 0; + } + } + + glyphbuf->reset(total_size); + + DWORD ret = GetGlyphOutlineW(fDDC, glyph, flags, &gm, total_size, glyphbuf->get(), &fMat22); + if (GDI_ERROR == ret) { + LogFontTypeface::EnsureAccessible(this->getTypeface()); + ret = GetGlyphOutlineW(fDDC, glyph, flags, &gm, total_size, glyphbuf->get(), &fMat22); + if (GDI_ERROR == ret) { + SkASSERT(false); + return 0; + } + } + } + return total_size; +} + +bool SkScalerContext_GDI::generatePath(const SkGlyph& glyph, SkPath* path) { + SkASSERT(path); + SkASSERT(fDDC); + + path->reset(); + + SkGlyphID glyphID = glyph.getGlyphID(); + + // Out of all the fonts on a typical Windows box, + // 25% of glyphs require more than 2KB. + // 1% of glyphs require more than 4KB. + // 0.01% of glyphs require more than 8KB. + // 8KB is less than 1% of the normal 1MB stack on Windows. + // Note that some web fonts glyphs require more than 20KB. + //static const DWORD BUFFERSIZE = (1 << 13); + + //GDI only uses hinted outlines when axis aligned. + UINT format = GGO_NATIVE | GGO_GLYPH_INDEX; + if (fRec.getHinting() == SkFontHinting::kNone || fRec.getHinting() == SkFontHinting::kSlight){ + format |= GGO_UNHINTED; + } + AutoSTMalloc glyphbuf(BUFFERSIZE); + DWORD total_size = getGDIGlyphPath(glyphID, format, &glyphbuf); + if (0 == total_size) { + return false; + } + + if (fRec.getHinting() != SkFontHinting::kSlight) { + SkGDIGeometrySink sink(path); + sink.process(glyphbuf, total_size); + } else { + AutoSTMalloc hintedGlyphbuf(BUFFERSIZE); + //GDI only uses hinted outlines when axis aligned. + DWORD hinted_total_size = getGDIGlyphPath(glyphID, GGO_NATIVE | GGO_GLYPH_INDEX, + &hintedGlyphbuf); + if (0 == hinted_total_size) { + return false; + } + + SkGDIGeometrySink sinkXBufYIter(path); + if (!sinkXBufYIter.process(glyphbuf, total_size, + GDIGlyphbufferPointIter(hintedGlyphbuf, hinted_total_size))) + { + // Both path and sinkXBufYIter are in the state they were in at the time of failure. + path->reset(); + SkGDIGeometrySink sink(path); + sink.process(glyphbuf, total_size); + } + } + return true; +} + +static void logfont_for_name(const char* familyName, LOGFONT* lf) { + sk_bzero(lf, sizeof(LOGFONT)); +#ifdef UNICODE + // Get the buffer size needed first. + size_t str_len = ::MultiByteToWideChar(CP_UTF8, 0, familyName, + -1, nullptr, 0); + // Allocate a buffer (str_len already has terminating null + // accounted for). + wchar_t *wideFamilyName = new wchar_t[str_len]; + // Now actually convert the string. + ::MultiByteToWideChar(CP_UTF8, 0, familyName, -1, + wideFamilyName, str_len); + ::wcsncpy(lf->lfFaceName, wideFamilyName, LF_FACESIZE - 1); + delete [] wideFamilyName; + lf->lfFaceName[LF_FACESIZE-1] = L'\0'; +#else + ::strncpy(lf->lfFaceName, familyName, LF_FACESIZE - 1); + lf->lfFaceName[LF_FACESIZE - 1] = '\0'; +#endif +} + +void LogFontTypeface::onGetFamilyName(SkString* familyName) const { + // Get the actual name of the typeface. The logfont may not know this. + SkAutoHDC hdc(fLogFont); + dcfontname_to_skstring(hdc, fLogFont, familyName); +} + +void LogFontTypeface::onGetFontDescriptor(SkFontDescriptor* desc, + bool* isLocalStream) const { + SkString familyName; + this->onGetFamilyName(&familyName); + desc->setFamilyName(familyName.c_str()); + desc->setStyle(this->fontStyle()); + *isLocalStream = this->fSerializeAsStream; +} + +void LogFontTypeface::getGlyphToUnicodeMap(SkUnichar* dstArray) const { + SkAutoHDC hdc(fLogFont); + unsigned int glyphCount = calculateGlyphCount(hdc, fLogFont); + populate_glyph_to_unicode(hdc, glyphCount, dstArray); +} + +std::unique_ptr LogFontTypeface::onGetAdvancedMetrics() const { + LOGFONT lf = fLogFont; + std::unique_ptr info(nullptr); + + // The design HFONT must be destroyed after the HDC + using HFONT_T = typename std::remove_pointer::type; + std::unique_ptr> designFont; + SkAutoHDC hdc(lf); + + const char stem_chars[] = {'i', 'I', '!', '1'}; + int16_t min_width; + unsigned glyphCount; + + // To request design units, create a logical font whose height is specified + // as unitsPerEm. + OUTLINETEXTMETRIC otm; + unsigned int otmRet = GetOutlineTextMetrics(hdc, sizeof(otm), &otm); + if (0 == otmRet) { + call_ensure_accessible(lf); + otmRet = GetOutlineTextMetrics(hdc, sizeof(otm), &otm); + } + if (!otmRet || !GetTextFace(hdc, LF_FACESIZE, lf.lfFaceName)) { + return info; + } + lf.lfHeight = -SkToS32(otm.otmEMSquare); + designFont.reset(CreateFontIndirect(&lf)); + SelectObject(hdc, designFont.get()); + if (!GetOutlineTextMetrics(hdc, sizeof(otm), &otm)) { + return info; + } + glyphCount = calculateGlyphCount(hdc, fLogFont); + + info.reset(new SkAdvancedTypefaceMetrics); + tchar_to_skstring(lf.lfFaceName, &info->fFontName); + + SkOTTableOS2_V4::Type fsType; + if (sizeof(fsType) == this->getTableData(SkTEndian_SwapBE32(SkOTTableOS2::TAG), + offsetof(SkOTTableOS2_V4, fsType), + sizeof(fsType), + &fsType)) { + SkOTUtils::SetAdvancedTypefaceFlags(fsType, info.get()); + } else { + // If bit 1 is set, the font may not be embedded in a document. + // If bit 1 is clear, the font can be embedded. + // If bit 2 is set, the embedding is read-only. + if (otm.otmfsType & 0x1) { + info->fFlags |= SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag; + } + } + + if (glyphCount == 0 || (otm.otmTextMetrics.tmPitchAndFamily & TMPF_TRUETYPE) == 0) { + return info; + } + info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; + + // If this bit is clear the font is a fixed pitch font. + if (!(otm.otmTextMetrics.tmPitchAndFamily & TMPF_FIXED_PITCH)) { + info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; + } + if (otm.otmTextMetrics.tmItalic) { + info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; + } + if (otm.otmTextMetrics.tmPitchAndFamily & FF_ROMAN) { + info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; + } else if (otm.otmTextMetrics.tmPitchAndFamily & FF_SCRIPT) { + info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; + } + + // The main italic angle of the font, in tenths of a degree counterclockwise + // from vertical. + info->fItalicAngle = otm.otmItalicAngle / 10; + info->fAscent = SkToS16(otm.otmTextMetrics.tmAscent); + info->fDescent = SkToS16(-otm.otmTextMetrics.tmDescent); + // TODO(ctguil): Use alternate cap height calculation. + // MSDN says otmsCapEmHeight is not support but it is returning a value on + // my Win7 box. + info->fCapHeight = otm.otmsCapEmHeight; + info->fBBox = + SkIRect::MakeLTRB(otm.otmrcFontBox.left, otm.otmrcFontBox.top, + otm.otmrcFontBox.right, otm.otmrcFontBox.bottom); + + // Figure out a good guess for StemV - Min width of i, I, !, 1. + // This probably isn't very good with an italic font. + min_width = SHRT_MAX; + info->fStemV = 0; + for (size_t i = 0; i < std::size(stem_chars); i++) { + ABC abcWidths; + if (GetCharABCWidths(hdc, stem_chars[i], stem_chars[i], &abcWidths)) { + int16_t width = abcWidths.abcB; + if (width > 0 && width < min_width) { + min_width = width; + info->fStemV = min_width; + } + } + } + + return info; +} + +//Placeholder representation of a Base64 encoded GUID from create_unique_font_name. +#define BASE64_GUID_ID "XXXXXXXXXXXXXXXXXXXXXXXX" +//Length of GUID representation from create_id, including nullptr terminator. +#define BASE64_GUID_ID_LEN std::size(BASE64_GUID_ID) + +static_assert(BASE64_GUID_ID_LEN < LF_FACESIZE, "GUID_longer_than_facesize"); + +/** + NameID 6 Postscript names cannot have the character '/'. + It would be easier to hex encode the GUID, but that is 32 bytes, + and many systems have issues with names longer than 28 bytes. + The following need not be any standard base64 encoding. + The encoded value is never decoded. +*/ +static const char postscript_safe_base64_encode[] = + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "0123456789-_="; + +/** + Formats a GUID into Base64 and places it into buffer. + buffer should have space for at least BASE64_GUID_ID_LEN characters. + The string will always be null terminated. + XXXXXXXXXXXXXXXXXXXXXXXX0 + */ +static void format_guid_b64(const GUID& guid, char* buffer, size_t bufferSize) { + SkASSERT(bufferSize >= BASE64_GUID_ID_LEN); + size_t written = SkBase64::Encode(&guid, sizeof(guid), buffer, postscript_safe_base64_encode); + SkASSERT(written < LF_FACESIZE); + buffer[written] = '\0'; +} + +/** + Creates a Base64 encoded GUID and places it into buffer. + buffer should have space for at least BASE64_GUID_ID_LEN characters. + The string will always be null terminated. + XXXXXXXXXXXXXXXXXXXXXXXX0 + */ +static HRESULT create_unique_font_name(char* buffer, size_t bufferSize) { + GUID guid = {}; + if (FAILED(CoCreateGuid(&guid))) { + return E_UNEXPECTED; + } + format_guid_b64(guid, buffer, bufferSize); + + return S_OK; +} + +/** + Introduces a font to GDI. On failure will return nullptr. The returned handle + should eventually be passed to RemoveFontMemResourceEx. +*/ +static HANDLE activate_font(SkData* fontData) { + DWORD numFonts = 0; + //AddFontMemResourceEx just copies the data, but does not specify const. + HANDLE fontHandle = AddFontMemResourceEx(const_cast(fontData->data()), + static_cast(fontData->size()), + nullptr, + &numFonts); + + if (fontHandle != nullptr && numFonts < 1) { + RemoveFontMemResourceEx(fontHandle); + return nullptr; + } + + return fontHandle; +} + +// Does not affect ownership of stream. +static sk_sp create_from_stream(std::unique_ptr stream) { + // Create a unique and unpredictable font name. + // Avoids collisions and access from CSS. + char familyName[BASE64_GUID_ID_LEN]; + const int familyNameSize = std::size(familyName); + if (FAILED(create_unique_font_name(familyName, familyNameSize))) { + return nullptr; + } + + // Change the name of the font. + sk_sp rewrittenFontData(SkOTUtils::RenameFont(stream.get(), familyName, familyNameSize-1)); + if (nullptr == rewrittenFontData.get()) { + return nullptr; + } + + // Register the font with GDI. + HANDLE fontReference = activate_font(rewrittenFontData.get()); + if (nullptr == fontReference) { + return nullptr; + } + + // Create the typeface. + LOGFONT lf; + logfont_for_name(familyName, &lf); + + return sk_sp(SkCreateFontMemResourceTypefaceFromLOGFONT(lf, fontReference)); +} + +std::unique_ptr LogFontTypeface::onOpenStream(int* ttcIndex) const { + *ttcIndex = 0; + + const DWORD kTTCTag = SkEndian_SwapBE32(SkSetFourByteTag('t', 't', 'c', 'f')); + LOGFONT lf = fLogFont; + + SkAutoHDC hdc(lf); + + std::unique_ptr stream; + DWORD tables[2] = {kTTCTag, 0}; + for (size_t i = 0; i < std::size(tables); i++) { + DWORD bufferSize = GetFontData(hdc, tables[i], 0, nullptr, 0); + if (bufferSize == GDI_ERROR) { + call_ensure_accessible(lf); + bufferSize = GetFontData(hdc, tables[i], 0, nullptr, 0); + } + if (bufferSize != GDI_ERROR) { + stream.reset(new SkMemoryStream(bufferSize)); + if (GetFontData(hdc, tables[i], 0, (void*)stream->getMemoryBase(), bufferSize)) { + break; + } else { + stream.reset(); + } + } + } + return stream; +} + +sk_sp LogFontTypeface::onMakeClone(const SkFontArguments& args) const { + return sk_ref_sp(this); +} + +static void bmpCharsToGlyphs(HDC hdc, const WCHAR* bmpChars, int count, uint16_t* glyphs, + bool Ox1FHack) +{ + // Type1 fonts fail with uniscribe API. Use GetGlyphIndices for plane 0. + + /** Real documentation for GetGlyphIndicesW: + * + * When GGI_MARK_NONEXISTING_GLYPHS is not specified and a character does not map to a + * glyph, then the 'default character's glyph is returned instead. The 'default character' + * is available in fTM.tmDefaultChar. FON fonts have a default character, and there exists + * a usDefaultChar in the 'OS/2' table, version 2 and later. If there is no + * 'default character' specified by the font, then often the first character found is used. + * + * When GGI_MARK_NONEXISTING_GLYPHS is specified and a character does not map to a glyph, + * then the glyph 0xFFFF is used. In Windows XP and earlier, Bitmap/Vector FON usually use + * glyph 0x1F instead ('Terminal' appears to be special, returning 0xFFFF). + * Type1 PFM/PFB, TT, OT TT, OT CFF all appear to use 0xFFFF, even on XP. + */ + DWORD result = GetGlyphIndicesW(hdc, bmpChars, count, glyphs, GGI_MARK_NONEXISTING_GLYPHS); + if (GDI_ERROR == result) { + for (int i = 0; i < count; ++i) { + glyphs[i] = 0; + } + return; + } + + if (Ox1FHack) { + for (int i = 0; i < count; ++i) { + if (0xFFFF == glyphs[i] || 0x1F == glyphs[i]) { + glyphs[i] = 0; + } + } + } else { + for (int i = 0; i < count; ++i) { + if (0xFFFF == glyphs[i]){ + glyphs[i] = 0; + } + } + } +} + +static uint16_t nonBmpCharToGlyph(HDC hdc, SCRIPT_CACHE* scriptCache, const WCHAR utf16[2]) { + uint16_t index = 0; + // Use uniscribe to detemine glyph index for non-BMP characters. + static const int numWCHAR = 2; + static const int maxItems = 2; + // MSDN states that this can be nullptr, but some things don't work then. + SCRIPT_CONTROL scriptControl; + memset(&scriptControl, 0, sizeof(scriptControl)); + // Add extra item to SCRIPT_ITEM to work around a bug (now documented). + // https://bugzilla.mozilla.org/show_bug.cgi?id=366643 + SCRIPT_ITEM si[maxItems + 1]; + int numItems; + HRZM(ScriptItemize(utf16, numWCHAR, maxItems, &scriptControl, nullptr, si, &numItems), + "Could not itemize character."); + + // Sometimes ScriptShape cannot find a glyph for a non-BMP and returns 2 space glyphs. + static const int maxGlyphs = 2; + SCRIPT_VISATTR vsa[maxGlyphs]; + WORD outGlyphs[maxGlyphs]; + WORD logClust[numWCHAR]; + int numGlyphs; + SCRIPT_ANALYSIS& script = si[0].a; + script.eScript = SCRIPT_UNDEFINED; + script.fRTL = FALSE; + script.fLayoutRTL = FALSE; + script.fLinkBefore = FALSE; + script.fLinkAfter = FALSE; + script.fLogicalOrder = FALSE; + script.fNoGlyphIndex = FALSE; + script.s.uBidiLevel = 0; + script.s.fOverrideDirection = 0; + script.s.fInhibitSymSwap = TRUE; + script.s.fCharShape = FALSE; + script.s.fDigitSubstitute = FALSE; + script.s.fInhibitLigate = FALSE; + script.s.fDisplayZWG = TRUE; + script.s.fArabicNumContext = FALSE; + script.s.fGcpClusters = FALSE; + script.s.fReserved = 0; + script.s.fEngineReserved = 0; + // For the future, 0x80040200 from here is USP_E_SCRIPT_NOT_IN_FONT + HRZM(ScriptShape(hdc, scriptCache, utf16, numWCHAR, maxGlyphs, &script, + outGlyphs, logClust, vsa, &numGlyphs), + "Could not shape character."); + if (1 == numGlyphs) { + index = outGlyphs[0]; + } + return index; +} + +void LogFontTypeface::onCharsToGlyphs(const SkUnichar* uni, int glyphCount, + SkGlyphID glyphs[]) const +{ + SkAutoHDC hdc(fLogFont); + + TEXTMETRIC tm; + if (0 == GetTextMetrics(hdc, &tm)) { + call_ensure_accessible(fLogFont); + if (0 == GetTextMetrics(hdc, &tm)) { + tm.tmPitchAndFamily = TMPF_TRUETYPE; + } + } + bool Ox1FHack = !(tm.tmPitchAndFamily & TMPF_VECTOR) /*&& winVer < Vista */; + + SCRIPT_CACHE sc = nullptr; + static const int scratchCount = 256; + WCHAR scratch[scratchCount]; + int glyphIndex = 0; + const uint32_t* utf32 = reinterpret_cast(uni); + while (glyphIndex < glyphCount) { + // Try a run of bmp. + int glyphsLeft = std::min(glyphCount - glyphIndex, scratchCount); + int runLength = 0; + while (runLength < glyphsLeft && utf32[glyphIndex + runLength] <= 0xFFFF) { + scratch[runLength] = static_cast(utf32[glyphIndex + runLength]); + ++runLength; + } + if (runLength) { + bmpCharsToGlyphs(hdc, scratch, runLength, &glyphs[glyphIndex], Ox1FHack); + glyphIndex += runLength; + } + + // Try a run of non-bmp. + while (glyphIndex < glyphCount && utf32[glyphIndex] > 0xFFFF) { + SkUTF::ToUTF16(utf32[glyphIndex], reinterpret_cast(scratch)); + glyphs[glyphIndex] = nonBmpCharToGlyph(hdc, &sc, scratch); + ++glyphIndex; + } + } + + if (sc) { + ::ScriptFreeCache(&sc); + } +} + +int LogFontTypeface::onCountGlyphs() const { + SkAutoHDC hdc(fLogFont); + return calculateGlyphCount(hdc, fLogFont); +} + +void LogFontTypeface::getPostScriptGlyphNames(SkString*) const {} + +int LogFontTypeface::onGetUPEM() const { + SkAutoHDC hdc(fLogFont); + return calculateUPEM(hdc, fLogFont); +} + +SkTypeface::LocalizedStrings* LogFontTypeface::onCreateFamilyNameIterator() const { + sk_sp nameIter = + SkOTUtils::LocalizedStrings_NameTable::MakeForFamilyNames(*this); + if (!nameIter) { + SkString familyName; + this->getFamilyName(&familyName); + SkString language("und"); //undetermined + nameIter = sk_make_sp(familyName, language); + } + return nameIter.release(); +} + +int LogFontTypeface::onGetTableTags(SkFontTableTag tags[]) const { + SkSFNTHeader header; + if (sizeof(header) != this->onGetTableData(0, 0, sizeof(header), &header)) { + return 0; + } + + int numTables = SkEndian_SwapBE16(header.numTables); + + if (tags) { + size_t size = numTables * sizeof(SkSFNTHeader::TableDirectoryEntry); + AutoSTMalloc<0x20, SkSFNTHeader::TableDirectoryEntry> dir(numTables); + if (size != this->onGetTableData(0, sizeof(header), size, dir.get())) { + return 0; + } + + for (int i = 0; i < numTables; ++i) { + tags[i] = SkEndian_SwapBE32(dir[i].tag); + } + } + return numTables; +} + +size_t LogFontTypeface::onGetTableData(SkFontTableTag tag, size_t offset, + size_t length, void* data) const +{ + LOGFONT lf = fLogFont; + SkAutoHDC hdc(lf); + + tag = SkEndian_SwapBE32(tag); + if (nullptr == data) { + length = 0; + } + DWORD bufferSize = GetFontData(hdc, tag, (DWORD) offset, data, (DWORD) length); + if (bufferSize == GDI_ERROR) { + call_ensure_accessible(lf); + bufferSize = GetFontData(hdc, tag, (DWORD) offset, data, (DWORD) length); + } + return bufferSize == GDI_ERROR ? 0 : bufferSize; +} + +sk_sp LogFontTypeface::onCopyTableData(SkFontTableTag tag) const { + LOGFONT lf = fLogFont; + SkAutoHDC hdc(lf); + + tag = SkEndian_SwapBE32(tag); + DWORD size = GetFontData(hdc, tag, 0, nullptr, 0); + if (size == GDI_ERROR) { + call_ensure_accessible(lf); + size = GetFontData(hdc, tag, 0, nullptr, 0); + } + + sk_sp data; + if (size != GDI_ERROR) { + data = SkData::MakeUninitialized(size); + if (GetFontData(hdc, tag, 0, data->writable_data(), size) == GDI_ERROR) { + data.reset(); + } + } + return data; +} + +std::unique_ptr LogFontTypeface::onCreateScalerContext( + const SkScalerContextEffects& effects, const SkDescriptor* desc) const +{ + auto ctx = std::make_unique( + sk_ref_sp(const_cast(this)), effects, desc); + if (ctx->isValid()) { + return std::move(ctx); + } + + ctx.reset(); + SkStrikeCache::PurgeAll(); + ctx = std::make_unique( + sk_ref_sp(const_cast(this)), effects, desc); + if (ctx->isValid()) { + return std::move(ctx); + } + + return SkScalerContext::MakeEmpty( + sk_ref_sp(const_cast(this)), effects, desc); +} + +void LogFontTypeface::onFilterRec(SkScalerContextRec* rec) const { + if (rec->fFlags & SkScalerContext::kLCD_BGROrder_Flag || + rec->fFlags & SkScalerContext::kLCD_Vertical_Flag) + { + rec->fMaskFormat = SkMask::kA8_Format; + rec->fFlags |= SkScalerContext::kGenA8FromLCD_Flag; + } + + unsigned flagsWeDontSupport = SkScalerContext::kForceAutohinting_Flag | + SkScalerContext::kEmbeddedBitmapText_Flag | + SkScalerContext::kEmbolden_Flag | + SkScalerContext::kLCD_BGROrder_Flag | + SkScalerContext::kLCD_Vertical_Flag; + rec->fFlags &= ~flagsWeDontSupport; + + SkFontHinting h = rec->getHinting(); + switch (h) { + case SkFontHinting::kNone: + break; + case SkFontHinting::kSlight: + // Only do slight hinting when axis aligned. + // TODO: re-enable slight hinting when FontHostTest can pass. + //if (!isAxisAligned(*rec)) { + h = SkFontHinting::kNone; + //} + break; + case SkFontHinting::kNormal: + case SkFontHinting::kFull: + // TODO: need to be able to distinguish subpixel positioned glyphs + // and linear metrics. + //rec->fFlags &= ~SkScalerContext::kSubpixelPositioning_Flag; + h = SkFontHinting::kNormal; + break; + default: + SkDEBUGFAIL("unknown hinting"); + } + //TODO: if this is a bitmap font, squash hinting and subpixel. + rec->setHinting(h); + +// turn this off since GDI might turn A8 into BW! Need a bigger fix. +#if 0 + // Disable LCD when rotated, since GDI's output is ugly + if (isLCD(*rec) && !isAxisAligned(*rec)) { + rec->fMaskFormat = SkMask::kA8_Format; + } +#endif + + if (!fCanBeLCD && isLCD(*rec)) { + rec->fMaskFormat = SkMask::kA8_Format; + rec->fFlags &= ~SkScalerContext::kGenA8FromLCD_Flag; + } else if (rec->fMaskFormat == SkMask::kA8_Format) { + // Bug 1277404 + // If we have non LCD GDI text, render the fonts as cleartype and convert them + // to grayscale. This seems to be what Chrome and IE are doing on Windows 7. + // This also applies if cleartype is disabled system wide. + rec->fFlags |= SkScalerContext::kGenA8FromLCD_Flag; + } +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "include/core/SkDataTable.h" +#include "include/core/SkFontMgr.h" + +static bool valid_logfont_for_enum(const LOGFONT& lf) { + // TODO: Vector FON is unsupported and should not be listed. + return + // Ignore implicit vertical variants. + lf.lfFaceName[0] && lf.lfFaceName[0] != '@' + + // DEFAULT_CHARSET is used to get all fonts, but also implies all + // character sets. Filter assuming all fonts support ANSI_CHARSET. + && ANSI_CHARSET == lf.lfCharSet + ; +} + +/** An EnumFontFamExProc implementation which interprets builderParam as + * an SkTDArray* and appends logfonts which + * pass the valid_logfont_for_enum predicate. + */ +static int CALLBACK enum_family_proc(const LOGFONT* lf, const TEXTMETRIC*, + DWORD fontType, LPARAM builderParam) { + if (valid_logfont_for_enum(*lf)) { + SkTDArray* array = (SkTDArray*)builderParam; + *array->append() = *(ENUMLOGFONTEX*)lf; + } + return 1; // non-zero means continue +} + +class SkFontStyleSetGDI : public SkFontStyleSet { +public: + SkFontStyleSetGDI(const TCHAR familyName[]) { + LOGFONT lf; + sk_bzero(&lf, sizeof(lf)); + lf.lfCharSet = DEFAULT_CHARSET; + _tcscpy_s(lf.lfFaceName, familyName); + + HDC hdc = ::CreateCompatibleDC(nullptr); + ::EnumFontFamiliesEx(hdc, &lf, enum_family_proc, (LPARAM)&fArray, 0); + ::DeleteDC(hdc); + } + + int count() override { + return fArray.size(); + } + + void getStyle(int index, SkFontStyle* fs, SkString* styleName) override { + if (fs) { + *fs = get_style(fArray[index].elfLogFont); + } + if (styleName) { + const ENUMLOGFONTEX& ref = fArray[index]; + // For some reason, ENUMLOGFONTEX and LOGFONT disagree on their type in the + // non-unicode version. + // ENUMLOGFONTEX uses BYTE + // LOGFONT uses CHAR + // Here we assert they that the style name is logically the same (size) as + // a TCHAR, so we can use the same converter function. + SkASSERT(sizeof(TCHAR) == sizeof(ref.elfStyle[0])); + tchar_to_skstring((const TCHAR*)ref.elfStyle, styleName); + } + } + + SkTypeface* createTypeface(int index) override { + return SkCreateTypefaceFromLOGFONT(fArray[index].elfLogFont); + } + + SkTypeface* matchStyle(const SkFontStyle& pattern) override { + return this->matchStyleCSS3(pattern); + } + +private: + SkTDArray fArray; +}; + +class SkFontMgrGDI : public SkFontMgr { +public: + SkFontMgrGDI() { + LOGFONT lf; + sk_bzero(&lf, sizeof(lf)); + lf.lfCharSet = DEFAULT_CHARSET; + + HDC hdc = ::CreateCompatibleDC(nullptr); + ::EnumFontFamiliesEx(hdc, &lf, enum_family_proc, (LPARAM)&fLogFontArray, 0); + ::DeleteDC(hdc); + } + +protected: + int onCountFamilies() const override { + return fLogFontArray.size(); + } + + void onGetFamilyName(int index, SkString* familyName) const override { + SkASSERT(index < fLogFontArray.size()); + tchar_to_skstring(fLogFontArray[index].elfLogFont.lfFaceName, familyName); + } + + SkFontStyleSet* onCreateStyleSet(int index) const override { + SkASSERT(index < fLogFontArray.size()); + return new SkFontStyleSetGDI(fLogFontArray[index].elfLogFont.lfFaceName); + } + + SkFontStyleSet* onMatchFamily(const char familyName[]) const override { + if (nullptr == familyName) { + familyName = ""; // do we need this check??? + } + LOGFONT lf; + logfont_for_name(familyName, &lf); + return new SkFontStyleSetGDI(lf.lfFaceName); + } + + virtual SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle& fontstyle) const override { + // could be in base impl + sk_sp sset(this->matchFamily(familyName)); + return sset->matchStyle(fontstyle); + } + + virtual SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override { + return nullptr; + } + + sk_sp onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const override { + if (ttcIndex != 0) { + return nullptr; + } + return create_from_stream(std::move(stream)); + } + + sk_sp onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const override { + return this->makeFromStream(std::move(stream), args.getCollectionIndex()); + } + + sk_sp onMakeFromData(sk_sp data, int ttcIndex) const override { + // could be in base impl + return this->makeFromStream(std::unique_ptr(new SkMemoryStream(std::move(data))), + ttcIndex); + } + + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override { + // could be in base impl + auto stream = SkStream::MakeFromFile(path); + return stream ? this->makeFromStream(std::move(stream), ttcIndex) : nullptr; + } + + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle style) const override { + LOGFONT lf; + if (nullptr == familyName) { + lf = get_default_font(); + } else { + logfont_for_name(familyName, &lf); + } + + lf.lfWeight = style.weight(); + lf.lfItalic = style.slant() == SkFontStyle::kUpright_Slant ? FALSE : TRUE; + return sk_sp(SkCreateTypefaceFromLOGFONT(lf)); + } + +private: + SkTDArray fLogFontArray; +}; + +/////////////////////////////////////////////////////////////////////////////// + +sk_sp SkFontMgr_New_GDI() { return sk_make_sp(); } + +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkFontMgr_FontConfigInterface.cpp b/gfx/skia/skia/src/ports/SkFontMgr_FontConfigInterface.cpp new file mode 100644 index 0000000000..89685e8aee --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_FontConfigInterface.cpp @@ -0,0 +1,276 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/ports/SkFontConfigInterface.h" +#include "include/ports/SkFontMgr_FontConfigInterface.h" +#include "include/private/base/SkMutex.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkResourceCache.h" +#include "src/core/SkTypefaceCache.h" +#include "src/ports/SkFontConfigTypeface.h" +#include + +using namespace skia_private; + +std::unique_ptr SkTypeface_FCI::onOpenStream(int* ttcIndex) const { + *ttcIndex = this->getIdentity().fTTCIndex; + return std::unique_ptr(fFCI->openStream(this->getIdentity())); +} + +std::unique_ptr SkTypeface_FCI::onMakeFontData() const { + const SkFontConfigInterface::FontIdentity& id = this->getIdentity(); + return std::make_unique(std::unique_ptr(fFCI->openStream(id)), + id.fTTCIndex, 0, nullptr, 0, nullptr, 0); +} + +void SkTypeface_FCI::onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const { + SkString name; + this->getFamilyName(&name); + desc->setFamilyName(name.c_str()); + desc->setStyle(this->fontStyle()); + desc->setFactoryId(SkTypeface_FreeType::FactoryId); + *serialize = true; +} + +/////////////////////////////////////////////////////////////////////////////// + +class SkFontStyleSet_FCI : public SkFontStyleSet { +public: + SkFontStyleSet_FCI() {} + + int count() override { return 0; } + void getStyle(int index, SkFontStyle*, SkString* style) override { SkASSERT(false); } + SkTypeface* createTypeface(int index) override { SkASSERT(false); return nullptr; } + SkTypeface* matchStyle(const SkFontStyle& pattern) override { return nullptr; } +}; + +/////////////////////////////////////////////////////////////////////////////// + +class SkFontRequestCache { +public: + struct Request : public SkResourceCache::Key { + private: + Request(const char* name, size_t nameLen, const SkFontStyle& style) : fStyle(style) { + /** Pointer to just after the last field of this class. */ + char* content = const_cast(SkTAfter(&this->fStyle)); + + // No holes. + SkASSERT(SkTAddOffset(this, sizeof(SkResourceCache::Key) + keySize) == content); + + // Has a size divisible by size of uint32_t. + SkASSERT((content - reinterpret_cast(this)) % sizeof(uint32_t) == 0); + + size_t contentLen = SkAlign4(nameLen); + sk_careful_memcpy(content, name, nameLen); + sk_bzero(content + nameLen, contentLen - nameLen); + this->init(nullptr, 0, keySize + contentLen); + } + const SkFontStyle fStyle; + /** The sum of the sizes of the fields of this class. */ + static const size_t keySize = sizeof(fStyle); + + public: + static Request* Create(const char* name, const SkFontStyle& style) { + size_t nameLen = name ? strlen(name) : 0; + size_t contentLen = SkAlign4(nameLen); + char* storage = new char[sizeof(Request) + contentLen]; + return new (storage) Request(name, nameLen, style); + } + void operator delete(void* storage) { + delete[] reinterpret_cast(storage); + } + }; + + +private: + struct Result : public SkResourceCache::Rec { + Result(Request* request, sk_sp typeface) + : fRequest(request), fFace(std::move(typeface)) {} + Result(Result&&) = default; + Result& operator=(Result&&) = default; + + const Key& getKey() const override { return *fRequest; } + size_t bytesUsed() const override { return fRequest->size() + sizeof(fFace); } + const char* getCategory() const override { return "request_cache"; } + SkDiscardableMemory* diagnostic_only_getDiscardable() const override { return nullptr; } + + std::unique_ptr fRequest; + sk_sp fFace; + }; + + SkResourceCache fCachedResults; + +public: + SkFontRequestCache(size_t maxSize) : fCachedResults(maxSize) {} + + /** Takes ownership of request. It will be deleted when no longer needed. */ + void add(sk_sp face, Request* request) { + fCachedResults.add(new Result(request, std::move(face))); + } + /** Does not take ownership of request. */ + sk_sp findAndRef(Request* request) { + sk_sp face; + fCachedResults.find(*request, [](const SkResourceCache::Rec& rec, void* context) -> bool { + const Result& result = static_cast(rec); + sk_sp* face = static_cast*>(context); + + *face = result.fFace; + return true; + }, &face); + return face; + } +}; + +/////////////////////////////////////////////////////////////////////////////// + +static bool find_by_FontIdentity(SkTypeface* cachedTypeface, void* ctx) { + typedef SkFontConfigInterface::FontIdentity FontIdentity; + SkTypeface_FCI* cachedFCTypeface = static_cast(cachedTypeface); + FontIdentity* identity = static_cast(ctx); + + return cachedFCTypeface->getIdentity() == *identity; +} + +/////////////////////////////////////////////////////////////////////////////// + +class SkFontMgr_FCI : public SkFontMgr { + sk_sp fFCI; + SkTypeface_FreeType::Scanner fScanner; + + mutable SkMutex fMutex; + mutable SkTypefaceCache fTFCache; + + // The value of maxSize here is a compromise between cache hits and cache size. + // See https://crbug.com/424082#63 for reason for current size. + static const size_t kMaxSize = 1 << 15; + mutable SkFontRequestCache fCache; + +public: + SkFontMgr_FCI(sk_sp fci) + : fFCI(std::move(fci)) + , fCache(kMaxSize) + {} + +protected: + int onCountFamilies() const override { + SK_ABORT("Not implemented."); + } + + void onGetFamilyName(int index, SkString* familyName) const override { + SK_ABORT("Not implemented."); + } + + SkFontStyleSet* onCreateStyleSet(int index) const override { + SK_ABORT("Not implemented."); + } + + SkFontStyleSet* onMatchFamily(const char familyName[]) const override { + SK_ABORT("Not implemented."); + } + + SkTypeface* onMatchFamilyStyle(const char requestedFamilyName[], + const SkFontStyle& requestedStyle) const override + { + SkAutoMutexExclusive ama(fMutex); + + SkFontConfigInterface::FontIdentity identity; + SkString outFamilyName; + SkFontStyle outStyle; + if (!fFCI->matchFamilyName(requestedFamilyName, requestedStyle, + &identity, &outFamilyName, &outStyle)) + { + return nullptr; + } + + // Check if a typeface with this FontIdentity is already in the FontIdentity cache. + sk_sp face = fTFCache.findByProcAndRef(find_by_FontIdentity, &identity); + if (!face) { + face.reset(SkTypeface_FCI::Create(fFCI, identity, std::move(outFamilyName), outStyle)); + // Add this FontIdentity to the FontIdentity cache. + fTFCache.add(face); + } + return face.release(); + } + + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override { + SK_ABORT("Not implemented."); + } + + sk_sp onMakeFromData(sk_sp data, int ttcIndex) const override { + return this->onMakeFromStreamIndex(SkMemoryStream::Make(std::move(data)), ttcIndex); + } + + sk_sp onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const override { + return this->makeFromStream(std::move(stream), + SkFontArguments().setCollectionIndex(ttcIndex)); + } + + sk_sp onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const override { + const size_t length = stream->getLength(); + if (!length) { + return nullptr; + } + if (length >= 1024 * 1024 * 1024) { + return nullptr; // don't accept too large fonts (>= 1GB) for safety. + } + + return SkTypeface_FreeType::MakeFromStream(std::move(stream), args); + } + + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override { + std::unique_ptr stream = SkStream::MakeFromFile(path); + return stream ? this->makeFromStream(std::move(stream), ttcIndex) : nullptr; + } + + sk_sp onLegacyMakeTypeface(const char requestedFamilyName[], + SkFontStyle requestedStyle) const override + { + SkAutoMutexExclusive ama(fMutex); + + // Check if this request is already in the request cache. + using Request = SkFontRequestCache::Request; + std::unique_ptr request(Request::Create(requestedFamilyName, requestedStyle)); + sk_sp face = fCache.findAndRef(request.get()); + if (face) { + return sk_sp(face); + } + + SkFontConfigInterface::FontIdentity identity; + SkString outFamilyName; + SkFontStyle outStyle; + if (!fFCI->matchFamilyName(requestedFamilyName, requestedStyle, + &identity, &outFamilyName, &outStyle)) + { + return nullptr; + } + + // Check if a typeface with this FontIdentity is already in the FontIdentity cache. + face = fTFCache.findByProcAndRef(find_by_FontIdentity, &identity); + if (!face) { + face.reset(SkTypeface_FCI::Create(fFCI, identity, std::move(outFamilyName), outStyle)); + // Add this FontIdentity to the FontIdentity cache. + fTFCache.add(face); + } + // Add this request to the request cache. + fCache.add(face, request.release()); + + return face; + } +}; + +SK_API sk_sp SkFontMgr_New_FCI(sk_sp fci) { + SkASSERT(fci); + return sk_make_sp(std::move(fci)); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_FontConfigInterface_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_FontConfigInterface_factory.cpp new file mode 100644 index 0000000000..cb64ec1ed4 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_FontConfigInterface_factory.cpp @@ -0,0 +1,18 @@ +/* + * Copyright 2008 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/ports/SkFontConfigInterface.h" +#include "include/ports/SkFontMgr_FontConfigInterface.h" + +sk_sp SkFontMgr::Factory() { + sk_sp fci(SkFontConfigInterface::RefGlobal()); + if (!fci) { + return nullptr; + } + return SkFontMgr_New_FCI(std::move(fci)); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_android.cpp b/gfx/skia/skia/src/ports/SkFontMgr_android.cpp new file mode 100644 index 0000000000..58a26e22ef --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_android.cpp @@ -0,0 +1,508 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#include "include/core/SkData.h" +#include "include/core/SkFontMgr.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkPaint.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/ports/SkFontMgr_android.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkTSearch.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkOSFile.h" +#include "src/core/SkTypefaceCache.h" +#include "src/ports/SkFontHost_FreeType_common.h" +#include "src/ports/SkFontMgr_android_parser.h" + +#include +#include + +using namespace skia_private; + +class SkData; + +class SkTypeface_Android : public SkTypeface_FreeType { +public: + SkTypeface_Android(const SkFontStyle& style, + bool isFixedPitch, + const SkString& familyName) + : INHERITED(style, isFixedPitch) + , fFamilyName(familyName) + { } + +protected: + void onGetFamilyName(SkString* familyName) const override { + *familyName = fFamilyName; + } + + SkString fFamilyName; + +private: + using INHERITED = SkTypeface_FreeType; +}; + +class SkTypeface_AndroidSystem : public SkTypeface_Android { +public: + SkTypeface_AndroidSystem(const SkString& pathName, + const bool cacheFontFiles, + int index, + const SkFixed* axes, int axesCount, + const SkFontStyle& style, + bool isFixedPitch, + const SkString& familyName, + const SkTArray& lang, + FontVariant variantStyle) + : INHERITED(style, isFixedPitch, familyName) + , fPathName(pathName) + , fIndex(index) + , fAxes(axes, axesCount) + , fLang(lang) + , fVariantStyle(variantStyle) + , fFile(cacheFontFiles ? sk_fopen(fPathName.c_str(), kRead_SkFILE_Flag) : nullptr) { + if (cacheFontFiles) { + SkASSERT(fFile); + } + } + + std::unique_ptr makeStream() const { + if (fFile) { + sk_sp data(SkData::MakeFromFILE(fFile)); + return data ? std::make_unique(std::move(data)) : nullptr; + } + return SkStream::MakeFromFile(fPathName.c_str()); + } + + void onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const override { + SkASSERT(desc); + SkASSERT(serialize); + desc->setFamilyName(fFamilyName.c_str()); + desc->setStyle(this->fontStyle()); + desc->setFactoryId(SkTypeface_FreeType::FactoryId); + *serialize = false; + } + std::unique_ptr onOpenStream(int* ttcIndex) const override { + *ttcIndex = fIndex; + return this->makeStream(); + } + std::unique_ptr onMakeFontData() const override { + return std::make_unique( + this->makeStream(), fIndex, 0, fAxes.begin(), fAxes.size(), nullptr, 0); + } + sk_sp onMakeClone(const SkFontArguments& args) const override { + std::unique_ptr data = this->cloneFontData(args); + if (!data) { + return nullptr; + } + return sk_make_sp(fPathName, + fFile, + fIndex, + data->getAxis(), + data->getAxisCount(), + this->fontStyle(), + this->isFixedPitch(), + fFamilyName, + fLang, + fVariantStyle); + } + + const SkString fPathName; + int fIndex; + const SkSTArray<4, SkFixed, true> fAxes; + const SkSTArray<4, SkLanguage, true> fLang; + const FontVariant fVariantStyle; + SkAutoTCallVProc fFile; + + using INHERITED = SkTypeface_Android; +}; + +class SkFontStyleSet_Android : public SkFontStyleSet { + typedef SkTypeface_FreeType::Scanner Scanner; + +public: + explicit SkFontStyleSet_Android(const FontFamily& family, const Scanner& scanner, + const bool cacheFontFiles) { + const SkString* cannonicalFamilyName = nullptr; + if (family.fNames.size() > 0) { + cannonicalFamilyName = &family.fNames[0]; + } + fFallbackFor = family.fFallbackFor; + + // TODO? make this lazy + for (int i = 0; i < family.fFonts.size(); ++i) { + const FontFileInfo& fontFile = family.fFonts[i]; + + SkString pathName(family.fBasePath); + pathName.append(fontFile.fFileName); + + std::unique_ptr stream = SkStream::MakeFromFile(pathName.c_str()); + if (!stream) { + SkDEBUGF("Requested font file %s does not exist or cannot be opened.\n", + pathName.c_str()); + continue; + } + + const int ttcIndex = fontFile.fIndex; + SkString familyName; + SkFontStyle style; + bool isFixedWidth; + Scanner::AxisDefinitions axisDefinitions; + if (!scanner.scanFont(stream.get(), ttcIndex, + &familyName, &style, &isFixedWidth, &axisDefinitions)) + { + SkDEBUGF("Requested font file %s exists, but is not a valid font.\n", + pathName.c_str()); + continue; + } + + int weight = fontFile.fWeight != 0 ? fontFile.fWeight : style.weight(); + SkFontStyle::Slant slant = style.slant(); + switch (fontFile.fStyle) { + case FontFileInfo::Style::kAuto: slant = style.slant(); break; + case FontFileInfo::Style::kNormal: slant = SkFontStyle::kUpright_Slant; break; + case FontFileInfo::Style::kItalic: slant = SkFontStyle::kItalic_Slant; break; + default: SkASSERT(false); break; + } + style = SkFontStyle(weight, style.width(), slant); + + uint32_t variant = family.fVariant; + if (kDefault_FontVariant == variant) { + variant = kCompact_FontVariant | kElegant_FontVariant; + } + + // The first specified family name overrides the family name found in the font. + // TODO: SkTypeface_AndroidSystem::onCreateFamilyNameIterator should return + // all of the specified family names in addition to the names found in the font. + if (cannonicalFamilyName != nullptr) { + familyName = *cannonicalFamilyName; + } + + AutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.size()); + SkFontArguments::VariationPosition position = { + fontFile.fVariationDesignPosition.begin(), + fontFile.fVariationDesignPosition.size() + }; + Scanner::computeAxisValues(axisDefinitions, position, + axisValues, familyName); + + fStyles.push_back().reset(new SkTypeface_AndroidSystem( + pathName, cacheFontFiles, ttcIndex, axisValues.get(), axisDefinitions.size(), + style, isFixedWidth, familyName, family.fLanguages, variant)); + } + } + + int count() override { + return fStyles.size(); + } + void getStyle(int index, SkFontStyle* style, SkString* name) override { + if (index < 0 || fStyles.size() <= index) { + return; + } + if (style) { + *style = fStyles[index]->fontStyle(); + } + if (name) { + name->reset(); + } + } + SkTypeface_AndroidSystem* createTypeface(int index) override { + if (index < 0 || fStyles.size() <= index) { + return nullptr; + } + return SkRef(fStyles[index].get()); + } + + SkTypeface_AndroidSystem* matchStyle(const SkFontStyle& pattern) override { + return static_cast(this->matchStyleCSS3(pattern)); + } + +private: + SkTArray> fStyles; + SkString fFallbackFor; + + friend struct NameToFamily; + friend class SkFontMgr_Android; + + using INHERITED = SkFontStyleSet; +}; + +/** On Android a single family can have many names, but our API assumes unique names. + * Map names to the back end so that all names for a given family refer to the same + * (non-replicated) set of typefaces. + * SkTDict<> doesn't let us do index-based lookup, so we write our own mapping. + */ +struct NameToFamily { + SkString name; + SkFontStyleSet_Android* styleSet; +}; + +class SkFontMgr_Android : public SkFontMgr { +public: + SkFontMgr_Android(const SkFontMgr_Android_CustomFonts* custom) { + SkTDArray families; + if (custom && SkFontMgr_Android_CustomFonts::kPreferSystem != custom->fSystemFontUse) { + SkString base(custom->fBasePath); + SkFontMgr_Android_Parser::GetCustomFontFamilies( + families, base, custom->fFontsXml, custom->fFallbackFontsXml); + } + if (!custom || + (custom && SkFontMgr_Android_CustomFonts::kOnlyCustom != custom->fSystemFontUse)) + { + SkFontMgr_Android_Parser::GetSystemFontFamilies(families); + } + if (custom && SkFontMgr_Android_CustomFonts::kPreferSystem == custom->fSystemFontUse) { + SkString base(custom->fBasePath); + SkFontMgr_Android_Parser::GetCustomFontFamilies( + families, base, custom->fFontsXml, custom->fFallbackFontsXml); + } + this->buildNameToFamilyMap(families, custom ? custom->fIsolated : false); + this->findDefaultStyleSet(); + for (FontFamily* p : families) { + delete p; + } + families.reset(); + } + +protected: + /** Returns not how many families we have, but how many unique names + * exist among the families. + */ + int onCountFamilies() const override { + return fNameToFamilyMap.size(); + } + + void onGetFamilyName(int index, SkString* familyName) const override { + if (index < 0 || fNameToFamilyMap.size() <= index) { + familyName->reset(); + return; + } + familyName->set(fNameToFamilyMap[index].name); + } + + SkFontStyleSet* onCreateStyleSet(int index) const override { + if (index < 0 || fNameToFamilyMap.size() <= index) { + return nullptr; + } + return SkRef(fNameToFamilyMap[index].styleSet); + } + + SkFontStyleSet* onMatchFamily(const char familyName[]) const override { + if (!familyName) { + return nullptr; + } + SkAutoAsciiToLC tolc(familyName); + for (int i = 0; i < fNameToFamilyMap.size(); ++i) { + if (fNameToFamilyMap[i].name.equals(tolc.lc())) { + return SkRef(fNameToFamilyMap[i].styleSet); + } + } + // TODO: eventually we should not need to name fallback families. + for (int i = 0; i < fFallbackNameToFamilyMap.size(); ++i) { + if (fFallbackNameToFamilyMap[i].name.equals(tolc.lc())) { + return SkRef(fFallbackNameToFamilyMap[i].styleSet); + } + } + return nullptr; + } + + SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle& style) const override { + sk_sp sset(this->matchFamily(familyName)); + return sset->matchStyle(style); + } + + static sk_sp find_family_style_character( + const SkString& familyName, + const SkTArray& fallbackNameToFamilyMap, + const SkFontStyle& style, bool elegant, + const SkString& langTag, SkUnichar character) + { + for (int i = 0; i < fallbackNameToFamilyMap.size(); ++i) { + SkFontStyleSet_Android* family = fallbackNameToFamilyMap[i].styleSet; + if (familyName != family->fFallbackFor) { + continue; + } + sk_sp face(family->matchStyle(style)); + + if (!langTag.isEmpty() && + std::none_of(face->fLang.begin(), face->fLang.end(), [&](SkLanguage lang){ + return lang.getTag().startsWith(langTag.c_str()); + })) + { + continue; + } + + if (SkToBool(face->fVariantStyle & kElegant_FontVariant) != elegant) { + continue; + } + + if (face->unicharToGlyph(character) != 0) { + return face; + } + } + return nullptr; + } + + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle& style, + const char* bcp47[], + int bcp47Count, + SkUnichar character) const override { + // The variant 'elegant' is 'not squashed', 'compact' is 'stays in ascent/descent'. + // The variant 'default' means 'compact and elegant'. + // As a result, it is not possible to know the variant context from the font alone. + // TODO: add 'is_elegant' and 'is_compact' bits to 'style' request. + + SkString familyNameString(familyName); + for (const SkString& currentFamilyName : { familyNameString, SkString() }) { + // The first time match anything elegant, second time anything not elegant. + for (int elegant = 2; elegant --> 0;) { + for (int bcp47Index = bcp47Count; bcp47Index --> 0;) { + SkLanguage lang(bcp47[bcp47Index]); + while (!lang.getTag().isEmpty()) { + sk_sp matchingTypeface = + find_family_style_character(currentFamilyName, fFallbackNameToFamilyMap, + style, SkToBool(elegant), + lang.getTag(), character); + if (matchingTypeface) { + return matchingTypeface.release(); + } + + lang = lang.getParent(); + } + } + sk_sp matchingTypeface = + find_family_style_character(currentFamilyName, fFallbackNameToFamilyMap, + style, SkToBool(elegant), + SkString(), character); + if (matchingTypeface) { + return matchingTypeface.release(); + } + } + } + return nullptr; + } + + sk_sp onMakeFromData(sk_sp data, int ttcIndex) const override { + return this->makeFromStream(std::unique_ptr(new SkMemoryStream(std::move(data))), + ttcIndex); + } + + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override { + std::unique_ptr stream = SkStream::MakeFromFile(path); + return stream ? this->makeFromStream(std::move(stream), ttcIndex) : nullptr; + } + + sk_sp onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const override { + return this->makeFromStream(std::move(stream), + SkFontArguments().setCollectionIndex(ttcIndex)); + } + + sk_sp onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const override { + return SkTypeface_FreeType::MakeFromStream(std::move(stream), args); + } + + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle style) const override { + if (familyName) { + // On Android, we must return nullptr when we can't find the requested + // named typeface so that the system/app can provide their own recovery + // mechanism. On other platforms we'd provide a typeface from the + // default family instead. + return sk_sp(this->onMatchFamilyStyle(familyName, style)); + } + return sk_sp(fDefaultStyleSet->matchStyle(style)); + } + + +private: + + SkTypeface_FreeType::Scanner fScanner; + + SkTArray> fStyleSets; + sk_sp fDefaultStyleSet; + + SkTArray fNameToFamilyMap; + SkTArray fFallbackNameToFamilyMap; + + void addFamily(FontFamily& family, const bool isolated, int familyIndex) { + SkTArray* nameToFamily = &fNameToFamilyMap; + if (family.fIsFallbackFont) { + nameToFamily = &fFallbackNameToFamilyMap; + + if (0 == family.fNames.size()) { + SkString& fallbackName = family.fNames.push_back(); + fallbackName.printf("%.2x##fallback", familyIndex); + } + } + + sk_sp newSet = + sk_make_sp(family, fScanner, isolated); + if (0 == newSet->count()) { + return; + } + + for (const SkString& name : family.fNames) { + nameToFamily->emplace_back(NameToFamily{name, newSet.get()}); + } + fStyleSets.emplace_back(std::move(newSet)); + } + void buildNameToFamilyMap(SkTDArray families, const bool isolated) { + int familyIndex = 0; + for (FontFamily* family : families) { + addFamily(*family, isolated, familyIndex++); + for (const auto& [unused, fallbackFamily] : family->fallbackFamilies) { + addFamily(*fallbackFamily, isolated, familyIndex++); + } + } + } + + void findDefaultStyleSet() { + SkASSERT(!fStyleSets.empty()); + + static const char* defaultNames[] = { "sans-serif" }; + for (const char* defaultName : defaultNames) { + fDefaultStyleSet.reset(this->onMatchFamily(defaultName)); + if (fDefaultStyleSet) { + break; + } + } + if (nullptr == fDefaultStyleSet) { + fDefaultStyleSet = fStyleSets[0]; + } + SkASSERT(fDefaultStyleSet); + } + + using INHERITED = SkFontMgr; +}; + +#ifdef SK_DEBUG +static char const * const gSystemFontUseStrings[] = { + "OnlyCustom", "PreferCustom", "PreferSystem" +}; +#endif + +sk_sp SkFontMgr_New_Android(const SkFontMgr_Android_CustomFonts* custom) { + if (custom) { + SkASSERT(0 <= custom->fSystemFontUse); + SkASSERT(custom->fSystemFontUse < std::size(gSystemFontUseStrings)); + SkDEBUGF("SystemFontUse: %s BasePath: %s Fonts: %s FallbackFonts: %s\n", + gSystemFontUseStrings[custom->fSystemFontUse], + custom->fBasePath, + custom->fFontsXml, + custom->fFallbackFontsXml); + } + return sk_make_sp(custom); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_android_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_android_factory.cpp new file mode 100644 index 0000000000..f4eaa3fbcb --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_android_factory.cpp @@ -0,0 +1,14 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/ports/SkFontMgr_android.h" + +sk_sp SkFontMgr::Factory() { + return SkFontMgr_New_Android(nullptr); +} + diff --git a/gfx/skia/skia/src/ports/SkFontMgr_android_parser.cpp b/gfx/skia/skia/src/ports/SkFontMgr_android_parser.cpp new file mode 100644 index 0000000000..94d69928a0 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_android_parser.cpp @@ -0,0 +1,846 @@ +/* + * Copyright 2011 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +// Despite the name and location, this is portable code. + +#include "include/core/SkFontMgr.h" +#include "include/core/SkStream.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTLogic.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkTSearch.h" +#include "src/core/SkOSFile.h" +#include "src/ports/SkFontMgr_android_parser.h" + +#include + +#include +#include + +#include + +#define LMP_SYSTEM_FONTS_FILE "/system/etc/fonts.xml" +#define OLD_SYSTEM_FONTS_FILE "/system/etc/system_fonts.xml" +#define FALLBACK_FONTS_FILE "/system/etc/fallback_fonts.xml" +#define VENDOR_FONTS_FILE "/vendor/etc/fallback_fonts.xml" + +#define LOCALE_FALLBACK_FONTS_SYSTEM_DIR "/system/etc" +#define LOCALE_FALLBACK_FONTS_VENDOR_DIR "/vendor/etc" +#define LOCALE_FALLBACK_FONTS_PREFIX "fallback_fonts-" +#define LOCALE_FALLBACK_FONTS_SUFFIX ".xml" + +#ifndef SK_FONT_FILE_PREFIX +# define SK_FONT_FILE_PREFIX "/fonts/" +#endif + +/** + * This file contains TWO 'familyset' handlers: + * One for JB and earlier which works with + * /system/etc/system_fonts.xml + * /system/etc/fallback_fonts.xml + * /vendor/etc/fallback_fonts.xml + * /system/etc/fallback_fonts-XX.xml + * /vendor/etc/fallback_fonts-XX.xml + * and the other for LMP and later which works with + * /system/etc/fonts.xml + * + * If the 'familyset' 'version' attribute is 21 or higher the LMP parser is used, otherwise the JB. + */ + +struct FamilyData; + +struct TagHandler { + /** Called at the start tag. + * Called immediately after the parent tag retuns this handler from a call to 'tag'. + * Allows setting up for handling the tag content and processing attributes. + * If nullptr, will not be called. + */ + void (*start)(FamilyData* data, const char* tag, const char** attributes); + + /** Called at the end tag. + * Allows post-processing of any accumulated information. + * This will be the last call made in relation to the current tag. + * If nullptr, will not be called. + */ + void (*end)(FamilyData* data, const char* tag); + + /** Called when a nested tag is encountered. + * This is responsible for determining how to handle the tag. + * If the tag is not recognized, return nullptr to skip the tag. + * If nullptr, all nested tags will be skipped. + */ + const TagHandler* (*tag)(FamilyData* data, const char* tag, const char** attributes); + + /** The character handler for this tag. + * This is only active for character data contained directly in this tag (not sub-tags). + * The first parameter will be castable to a FamilyData*. + * If nullptr, any character data in this tag will be ignored. + */ + XML_CharacterDataHandler chars; +}; + +/** Represents the current parsing state. */ +struct FamilyData { + FamilyData(XML_Parser parser, SkTDArray& families, + const SkString& basePath, bool isFallback, const char* filename, + const TagHandler* topLevelHandler) + : fParser(parser) + , fFamilies(families) + , fCurrentFamily(nullptr) + , fCurrentFontInfo(nullptr) + , fVersion(0) + , fBasePath(basePath) + , fIsFallback(isFallback) + , fFilename(filename) + , fDepth(1) + , fSkip(0) + , fHandler(&topLevelHandler, 1) + { } + + XML_Parser fParser; // The expat parser doing the work, owned by caller + SkTDArray& fFamilies; // The array to append families, owned by caller + std::unique_ptr fCurrentFamily; // The family being created, owned by this + FontFileInfo* fCurrentFontInfo; // The info being created, owned by fCurrentFamily + int fVersion; // The version of the file parsed. + const SkString& fBasePath; // The current base path. + const bool fIsFallback; // The file being parsed is a fallback file + const char* fFilename; // The name of the file currently being parsed. + + int fDepth; // The current element depth of the parse. + int fSkip; // The depth to stop skipping, 0 if not skipping. + SkTDArray fHandler; // The stack of current tag handlers. +}; + +static bool memeq(const char* s1, const char* s2, size_t n1, size_t n2) { + return n1 == n2 && 0 == memcmp(s1, s2, n1); +} +#define MEMEQ(c, s, n) memeq(c, s, sizeof(c) - 1, n) + +#define ATTS_NON_NULL(a, i) (a[i] != nullptr && a[i+1] != nullptr) + +#define SK_FONTMGR_ANDROID_PARSER_PREFIX "[SkFontMgr Android Parser] " + +#define SK_FONTCONFIGPARSER_WARNING(message, ...) \ + SkDebugf(SK_FONTMGR_ANDROID_PARSER_PREFIX "%s:%d:%d: warning: " message "\n", \ + self->fFilename, \ + (int)XML_GetCurrentLineNumber(self->fParser), \ + (int)XML_GetCurrentColumnNumber(self->fParser), \ + ##__VA_ARGS__) + +static bool is_whitespace(char c) { + return c == ' ' || c == '\n'|| c == '\r' || c == '\t'; +} + +static void trim_string(SkString* s) { + char* str = s->data(); + const char* start = str; // start is inclusive + const char* end = start + s->size(); // end is exclusive + while (is_whitespace(*start)) { ++start; } + if (start != end) { + --end; // make end inclusive + while (is_whitespace(*end)) { --end; } + ++end; // make end exclusive + } + size_t len = end - start; + memmove(str, start, len); + s->resize(len); +} + +static void parse_space_separated_languages(const char* value, size_t valueLen, + SkTArray& languages) +{ + size_t i = 0; + while (true) { + for (; i < valueLen && is_whitespace(value[i]); ++i) { } + if (i == valueLen) { break; } + size_t j; + for (j = i + 1; j < valueLen && !is_whitespace(value[j]); ++j) { } + languages.emplace_back(value + i, j - i); + i = j; + if (i == valueLen) { break; } + } +} + +namespace lmpParser { + +static const TagHandler axisHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { + FontFileInfo& file = *self->fCurrentFontInfo; + SkFourByteTag axisTag = SkSetFourByteTag('\0','\0','\0','\0'); + SkFixed axisStyleValue = 0; + bool axisTagIsValid = false; + bool axisStyleValueIsValid = false; + for (size_t i = 0; ATTS_NON_NULL(attributes, i); i += 2) { + const char* name = attributes[i]; + const char* value = attributes[i+1]; + size_t nameLen = strlen(name); + if (MEMEQ("tag", name, nameLen)) { + size_t valueLen = strlen(value); + if (valueLen == 4) { + axisTag = SkSetFourByteTag(value[0], value[1], value[2], value[3]); + axisTagIsValid = true; + for (int j = 0; j < file.fVariationDesignPosition.size() - 1; ++j) { + if (file.fVariationDesignPosition[j].axis == axisTag) { + axisTagIsValid = false; + SK_FONTCONFIGPARSER_WARNING("'%c%c%c%c' axis specified more than once", + (axisTag >> 24) & 0xFF, + (axisTag >> 16) & 0xFF, + (axisTag >> 8) & 0xFF, + (axisTag ) & 0xFF); + } + } + } else { + SK_FONTCONFIGPARSER_WARNING("'%s' is an invalid axis tag", value); + } + } else if (MEMEQ("stylevalue", name, nameLen)) { + if (parse_fixed<16>(value, &axisStyleValue)) { + axisStyleValueIsValid = true; + } else { + SK_FONTCONFIGPARSER_WARNING("'%s' is an invalid axis stylevalue", value); + } + } + } + if (axisTagIsValid && axisStyleValueIsValid) { + auto& coordinate = file.fVariationDesignPosition.push_back(); + coordinate.axis = axisTag; + coordinate.value = SkFixedToScalar(axisStyleValue); + } + }, + /*end*/nullptr, + /*tag*/nullptr, + /*chars*/nullptr, +}; + +static const TagHandler fontHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { + // 'weight' (non-negative integer) [default 0] + // 'style' ("normal", "italic") [default "auto"] + // 'index' (non-negative integer) [default 0] + // The character data should be a filename. + FontFileInfo& file = self->fCurrentFamily->fFonts.push_back(); + self->fCurrentFontInfo = &file; + SkString fallbackFor; + for (size_t i = 0; ATTS_NON_NULL(attributes, i); i += 2) { + const char* name = attributes[i]; + const char* value = attributes[i+1]; + size_t nameLen = strlen(name); + if (MEMEQ("weight", name, nameLen)) { + if (!parse_non_negative_integer(value, &file.fWeight)) { + SK_FONTCONFIGPARSER_WARNING("'%s' is an invalid weight", value); + } + } else if (MEMEQ("style", name, nameLen)) { + size_t valueLen = strlen(value); + if (MEMEQ("normal", value, valueLen)) { + file.fStyle = FontFileInfo::Style::kNormal; + } else if (MEMEQ("italic", value, valueLen)) { + file.fStyle = FontFileInfo::Style::kItalic; + } + } else if (MEMEQ("index", name, nameLen)) { + if (!parse_non_negative_integer(value, &file.fIndex)) { + SK_FONTCONFIGPARSER_WARNING("'%s' is an invalid index", value); + } + } else if (MEMEQ("fallbackFor", name, nameLen)) { + /** fallbackFor specifies a family fallback and should have been on family. */ + fallbackFor = value; + } + } + if (!fallbackFor.isEmpty()) { + std::unique_ptr* fallbackFamily = + self->fCurrentFamily->fallbackFamilies.find(fallbackFor); + if (!fallbackFamily) { + std::unique_ptr newFallbackFamily( + new FontFamily(self->fCurrentFamily->fBasePath, true)); + fallbackFamily = self->fCurrentFamily->fallbackFamilies.set( + fallbackFor, std::move(newFallbackFamily)); + (*fallbackFamily)->fLanguages = self->fCurrentFamily->fLanguages; + (*fallbackFamily)->fVariant = self->fCurrentFamily->fVariant; + (*fallbackFamily)->fOrder = self->fCurrentFamily->fOrder; + (*fallbackFamily)->fFallbackFor = fallbackFor; + } + self->fCurrentFontInfo = &(*fallbackFamily)->fFonts.emplace_back(file); + self->fCurrentFamily->fFonts.pop_back(); + } + }, + /*end*/[](FamilyData* self, const char* tag) { + trim_string(&self->fCurrentFontInfo->fFileName); + }, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("axis", tag, len)) { + return &axisHandler; + } + return nullptr; + }, + /*chars*/[](void* data, const char* s, int len) { + FamilyData* self = static_cast(data); + self->fCurrentFontInfo->fFileName.append(s, len); + } +}; + +static const TagHandler familyHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { + // 'name' (string) [optional] + // 'lang' (space separated string) [default ""] + // 'variant' ("elegant", "compact") [default "default"] + // If there is no name, this is a fallback only font. + FontFamily* family = new FontFamily(self->fBasePath, true); + self->fCurrentFamily.reset(family); + for (size_t i = 0; ATTS_NON_NULL(attributes, i); i += 2) { + const char* name = attributes[i]; + const char* value = attributes[i+1]; + size_t nameLen = strlen(name); + size_t valueLen = strlen(value); + if (MEMEQ("name", name, nameLen)) { + SkAutoAsciiToLC tolc(value); + family->fNames.push_back().set(tolc.lc()); + family->fIsFallbackFont = false; + } else if (MEMEQ("lang", name, nameLen)) { + parse_space_separated_languages(value, valueLen, family->fLanguages); + } else if (MEMEQ("variant", name, nameLen)) { + if (MEMEQ("elegant", value, valueLen)) { + family->fVariant = kElegant_FontVariant; + } else if (MEMEQ("compact", value, valueLen)) { + family->fVariant = kCompact_FontVariant; + } + } + } + }, + /*end*/[](FamilyData* self, const char* tag) { + *self->fFamilies.append() = self->fCurrentFamily.release(); + }, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("font", tag, len)) { + return &fontHandler; + } + return nullptr; + }, + /*chars*/nullptr, +}; + +static FontFamily* find_family(FamilyData* self, const SkString& familyName) { + for (int i = 0; i < self->fFamilies.size(); i++) { + FontFamily* candidate = self->fFamilies[i]; + for (int j = 0; j < candidate->fNames.size(); j++) { + if (candidate->fNames[j] == familyName) { + return candidate; + } + } + } + return nullptr; +} + +static const TagHandler aliasHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { + // 'name' (string) introduces a new family name. + // 'to' (string) specifies which (previous) family to alias + // 'weight' (non-negative integer) [optional] + // If it *does not* have a weight, 'name' is an alias for the entire 'to' family. + // If it *does* have a weight, 'name' is a new family consisting of + // the font(s) with 'weight' from the 'to' family. + + SkString aliasName; + SkString to; + int weight = 0; + for (size_t i = 0; ATTS_NON_NULL(attributes, i); i += 2) { + const char* name = attributes[i]; + const char* value = attributes[i+1]; + size_t nameLen = strlen(name); + if (MEMEQ("name", name, nameLen)) { + SkAutoAsciiToLC tolc(value); + aliasName.set(tolc.lc()); + } else if (MEMEQ("to", name, nameLen)) { + to.set(value); + } else if (MEMEQ("weight", name, nameLen)) { + if (!parse_non_negative_integer(value, &weight)) { + SK_FONTCONFIGPARSER_WARNING("'%s' is an invalid weight", value); + } + } + } + + // Assumes that the named family is already declared + FontFamily* targetFamily = find_family(self, to); + if (!targetFamily) { + SK_FONTCONFIGPARSER_WARNING("'%s' alias target not found", to.c_str()); + return; + } + + if (weight) { + FontFamily* family = new FontFamily(targetFamily->fBasePath, self->fIsFallback); + family->fNames.push_back().set(aliasName); + + for (int i = 0; i < targetFamily->fFonts.size(); i++) { + if (targetFamily->fFonts[i].fWeight == weight) { + family->fFonts.push_back(targetFamily->fFonts[i]); + } + } + *self->fFamilies.append() = family; + } else { + targetFamily->fNames.push_back().set(aliasName); + } + }, + /*end*/nullptr, + /*tag*/nullptr, + /*chars*/nullptr, +}; + +static const TagHandler familySetHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { }, + /*end*/nullptr, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("family", tag, len)) { + return &familyHandler; + } else if (MEMEQ("alias", tag, len)) { + return &aliasHandler; + } + return nullptr; + }, + /*chars*/nullptr, +}; + +} // namespace lmpParser + +namespace jbParser { + +static const TagHandler fileHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { + // 'variant' ("elegant", "compact") [default "default"] + // 'lang' (string) [default ""] + // 'index' (non-negative integer) [default 0] + // The character data should be a filename. + FontFamily& currentFamily = *self->fCurrentFamily; + FontFileInfo& newFileInfo = currentFamily.fFonts.push_back(); + if (attributes) { + for (size_t i = 0; ATTS_NON_NULL(attributes, i); i += 2) { + const char* name = attributes[i]; + const char* value = attributes[i+1]; + size_t nameLen = strlen(name); + size_t valueLen = strlen(value); + if (MEMEQ("variant", name, nameLen)) { + const FontVariant prevVariant = currentFamily.fVariant; + if (MEMEQ("elegant", value, valueLen)) { + currentFamily.fVariant = kElegant_FontVariant; + } else if (MEMEQ("compact", value, valueLen)) { + currentFamily.fVariant = kCompact_FontVariant; + } + if (currentFamily.fFonts.size() > 1 && currentFamily.fVariant != prevVariant) { + SK_FONTCONFIGPARSER_WARNING("'%s' unexpected variant found\n" + "Note: Every font file within a family must have identical variants.", + value); + } + + } else if (MEMEQ("lang", name, nameLen)) { + SkLanguage currentLanguage = SkLanguage(value, valueLen); + bool showWarning = false; + if (currentFamily.fLanguages.empty()) { + showWarning = (currentFamily.fFonts.size() > 1); + currentFamily.fLanguages.push_back(std::move(currentLanguage)); + } else if (currentFamily.fLanguages[0] != currentLanguage) { + showWarning = true; + currentFamily.fLanguages[0] = std::move(currentLanguage); + } + if (showWarning) { + SK_FONTCONFIGPARSER_WARNING("'%s' unexpected language found\n" + "Note: Every font file within a family must have identical languages.", + value); + } + + } else if (MEMEQ("index", name, nameLen)) { + if (!parse_non_negative_integer(value, &newFileInfo.fIndex)) { + SK_FONTCONFIGPARSER_WARNING("'%s' is an invalid index", value); + } + } + } + } + self->fCurrentFontInfo = &newFileInfo; + }, + /*end*/nullptr, + /*tag*/nullptr, + /*chars*/[](void* data, const char* s, int len) { + FamilyData* self = static_cast(data); + self->fCurrentFontInfo->fFileName.append(s, len); + } +}; + +static const TagHandler fileSetHandler = { + /*start*/nullptr, + /*end*/nullptr, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("file", tag, len)) { + return &fileHandler; + } + return nullptr; + }, + /*chars*/nullptr, +}; + +static const TagHandler nameHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { + // The character data should be a name for the font. + self->fCurrentFamily->fNames.push_back(); + }, + /*end*/nullptr, + /*tag*/nullptr, + /*chars*/[](void* data, const char* s, int len) { + FamilyData* self = static_cast(data); + SkAutoAsciiToLC tolc(s, len); + self->fCurrentFamily->fNames.back().append(tolc.lc(), len); + } +}; + +static const TagHandler nameSetHandler = { + /*start*/nullptr, + /*end*/nullptr, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("name", tag, len)) { + return &nameHandler; + } + return nullptr; + }, + /*chars*/nullptr, +}; + +static const TagHandler familyHandler = { + /*start*/[](FamilyData* self, const char* tag, const char** attributes) { + self->fCurrentFamily = std::make_unique(self->fBasePath, self->fIsFallback); + // 'order' (non-negative integer) [default -1] + for (size_t i = 0; ATTS_NON_NULL(attributes, i); i += 2) { + const char* value = attributes[i+1]; + parse_non_negative_integer(value, &self->fCurrentFamily->fOrder); + } + }, + /*end*/[](FamilyData* self, const char* tag) { + *self->fFamilies.append() = self->fCurrentFamily.release(); + }, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("nameset", tag, len)) { + return &nameSetHandler; + } else if (MEMEQ("fileset", tag, len)) { + return &fileSetHandler; + } + return nullptr; + }, + /*chars*/nullptr, +}; + +static const TagHandler familySetHandler = { + /*start*/nullptr, + /*end*/nullptr, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("family", tag, len)) { + return &familyHandler; + } + return nullptr; + }, + /*chars*/nullptr, +}; + +} // namespace jbParser + +static const TagHandler topLevelHandler = { + /*start*/nullptr, + /*end*/nullptr, + /*tag*/[](FamilyData* self, const char* tag, const char** attributes) -> const TagHandler* { + size_t len = strlen(tag); + if (MEMEQ("familyset", tag, len)) { + // 'version' (non-negative integer) [default 0] + for (size_t i = 0; ATTS_NON_NULL(attributes, i); i += 2) { + const char* name = attributes[i]; + size_t nameLen = strlen(name); + if (MEMEQ("version", name, nameLen)) { + const char* value = attributes[i+1]; + if (parse_non_negative_integer(value, &self->fVersion)) { + if (self->fVersion >= 21) { + return &lmpParser::familySetHandler; + } + } + } + } + return &jbParser::familySetHandler; + } + return nullptr; + }, + /*chars*/nullptr, +}; + +static void XMLCALL start_element_handler(void *data, const char *tag, const char **attributes) { + FamilyData* self = static_cast(data); + + if (!self->fSkip) { + const TagHandler* parent = self->fHandler.back(); + const TagHandler* child = parent->tag ? parent->tag(self, tag, attributes) : nullptr; + if (child) { + if (child->start) { + child->start(self, tag, attributes); + } + self->fHandler.push_back(child); + XML_SetCharacterDataHandler(self->fParser, child->chars); + } else { + SK_FONTCONFIGPARSER_WARNING("'%s' tag not recognized, skipping", tag); + XML_SetCharacterDataHandler(self->fParser, nullptr); + self->fSkip = self->fDepth; + } + } + + ++self->fDepth; +} + +static void XMLCALL end_element_handler(void* data, const char* tag) { + FamilyData* self = static_cast(data); + --self->fDepth; + + if (!self->fSkip) { + const TagHandler* child = self->fHandler.back(); + if (child->end) { + child->end(self, tag); + } + self->fHandler.pop_back(); + const TagHandler* parent = self->fHandler.back(); + XML_SetCharacterDataHandler(self->fParser, parent->chars); + } + + if (self->fSkip == self->fDepth) { + self->fSkip = 0; + const TagHandler* parent = self->fHandler.back(); + XML_SetCharacterDataHandler(self->fParser, parent->chars); + } +} + +static void XMLCALL xml_entity_decl_handler(void *data, + const XML_Char *entityName, + int is_parameter_entity, + const XML_Char *value, + int value_length, + const XML_Char *base, + const XML_Char *systemId, + const XML_Char *publicId, + const XML_Char *notationName) +{ + FamilyData* self = static_cast(data); + SK_FONTCONFIGPARSER_WARNING("'%s' entity declaration found, stopping processing", entityName); + XML_StopParser(self->fParser, XML_FALSE); +} + +static const XML_Memory_Handling_Suite sk_XML_alloc = { + sk_malloc_throw, + sk_realloc_throw, + sk_free +}; + +/** + * This function parses the given filename and stores the results in the given + * families array. Returns the version of the file, negative if the file does not exist. + */ +static int parse_config_file(const char* filename, SkTDArray& families, + const SkString& basePath, bool isFallback) +{ + SkFILEStream file(filename); + + // Some of the files we attempt to parse (in particular, /vendor/etc/fallback_fonts.xml) + // are optional - failure here is okay because one of these optional files may not exist. + if (!file.isValid()) { + SkDebugf(SK_FONTMGR_ANDROID_PARSER_PREFIX "'%s' could not be opened\n", filename); + return -1; + } + + SkAutoTCallVProc, XML_ParserFree> parser( + XML_ParserCreate_MM(nullptr, &sk_XML_alloc, nullptr)); + if (!parser) { + SkDebugf(SK_FONTMGR_ANDROID_PARSER_PREFIX "could not create XML parser\n"); + return -1; + } + + FamilyData self(parser, families, basePath, isFallback, filename, &topLevelHandler); + XML_SetUserData(parser, &self); + + // Disable entity processing, to inhibit internal entity expansion. See expat CVE-2013-0340 + XML_SetEntityDeclHandler(parser, xml_entity_decl_handler); + + // Start parsing oldschool; switch these in flight if we detect a newer version of the file. + XML_SetElementHandler(parser, start_element_handler, end_element_handler); + + // One would assume it would be faster to have a buffer on the stack and call XML_Parse. + // But XML_Parse will call XML_GetBuffer anyway and memmove the passed buffer into it. + // (Unless XML_CONTEXT_BYTES is undefined, but all users define it.) + // In debug, buffer a small odd number of bytes to detect slicing in XML_CharacterDataHandler. + static const int bufferSize = 512 SkDEBUGCODE( - 507); + bool done = false; + while (!done) { + void* buffer = XML_GetBuffer(parser, bufferSize); + if (!buffer) { + SkDebugf(SK_FONTMGR_ANDROID_PARSER_PREFIX "could not buffer enough to continue\n"); + return -1; + } + size_t len = file.read(buffer, bufferSize); + done = file.isAtEnd(); + XML_Status status = XML_ParseBuffer(parser, len, done); + if (XML_STATUS_ERROR == status) { + XML_Error error = XML_GetErrorCode(parser); + int line = XML_GetCurrentLineNumber(parser); + int column = XML_GetCurrentColumnNumber(parser); + const XML_LChar* errorString = XML_ErrorString(error); + SkDebugf(SK_FONTMGR_ANDROID_PARSER_PREFIX "%s:%d:%d error %d: %s.\n", + filename, line, column, error, errorString); + return -1; + } + } + return self.fVersion; +} + +/** Returns the version of the system font file actually found, negative if none. */ +static int append_system_font_families(SkTDArray& fontFamilies, + const SkString& basePath) +{ + int initialCount = fontFamilies.size(); + int version = parse_config_file(LMP_SYSTEM_FONTS_FILE, fontFamilies, basePath, false); + if (version < 0 || fontFamilies.size() == initialCount) { + version = parse_config_file(OLD_SYSTEM_FONTS_FILE, fontFamilies, basePath, false); + } + return version; +} + +/** + * In some versions of Android prior to Android 4.2 (JellyBean MR1 at API + * Level 17) the fallback fonts for certain locales were encoded in their own + * XML files with a suffix that identified the locale. We search the provided + * directory for those files,add all of their entries to the fallback chain, and + * include the locale as part of each entry. + */ +static void append_fallback_font_families_for_locale(SkTDArray& fallbackFonts, + const char* dir, + const SkString& basePath) +{ + SkOSFile::Iter iter(dir, nullptr); + SkString fileName; + while (iter.next(&fileName, false)) { + // The size of the prefix and suffix. + static const size_t fixedLen = sizeof(LOCALE_FALLBACK_FONTS_PREFIX) - 1 + + sizeof(LOCALE_FALLBACK_FONTS_SUFFIX) - 1; + + // The size of the prefix, suffix, and a minimum valid language code + static const size_t minSize = fixedLen + 2; + + if (fileName.size() < minSize || + !fileName.startsWith(LOCALE_FALLBACK_FONTS_PREFIX) || + !fileName.endsWith(LOCALE_FALLBACK_FONTS_SUFFIX)) + { + continue; + } + + SkString locale(fileName.c_str() + sizeof(LOCALE_FALLBACK_FONTS_PREFIX) - 1, + fileName.size() - fixedLen); + + SkString absoluteFilename; + absoluteFilename.printf("%s/%s", dir, fileName.c_str()); + + SkTDArray langSpecificFonts; + parse_config_file(absoluteFilename.c_str(), langSpecificFonts, basePath, true); + + for (int i = 0; i < langSpecificFonts.size(); ++i) { + FontFamily* family = langSpecificFonts[i]; + family->fLanguages.emplace_back(locale); + *fallbackFonts.append() = family; + } + } +} + +static void append_system_fallback_font_families(SkTDArray& fallbackFonts, + const SkString& basePath) +{ + parse_config_file(FALLBACK_FONTS_FILE, fallbackFonts, basePath, true); + append_fallback_font_families_for_locale(fallbackFonts, + LOCALE_FALLBACK_FONTS_SYSTEM_DIR, + basePath); +} + +static void mixin_vendor_fallback_font_families(SkTDArray& fallbackFonts, + const SkString& basePath) +{ + SkTDArray vendorFonts; + parse_config_file(VENDOR_FONTS_FILE, vendorFonts, basePath, true); + append_fallback_font_families_for_locale(vendorFonts, + LOCALE_FALLBACK_FONTS_VENDOR_DIR, + basePath); + + // This loop inserts the vendor fallback fonts in the correct order in the + // overall fallbacks list. + int currentOrder = -1; + for (int i = 0; i < vendorFonts.size(); ++i) { + FontFamily* family = vendorFonts[i]; + int order = family->fOrder; + if (order < 0) { + if (currentOrder < 0) { + // Default case - just add it to the end of the fallback list + *fallbackFonts.append() = family; + } else { + // no order specified on this font, but we're incrementing the order + // based on an earlier order insertion request + *fallbackFonts.insert(currentOrder++) = family; + } + } else { + // Add the font into the fallback list in the specified order. Set + // currentOrder for correct placement of other fonts in the vendor list. + *fallbackFonts.insert(order) = family; + currentOrder = order + 1; + } + } +} + +void SkFontMgr_Android_Parser::GetSystemFontFamilies(SkTDArray& fontFamilies) { + // Version 21 of the system font configuration does not need any fallback configuration files. + SkString basePath(getenv("ANDROID_ROOT")); + basePath.append(SK_FONT_FILE_PREFIX, sizeof(SK_FONT_FILE_PREFIX) - 1); + + if (append_system_font_families(fontFamilies, basePath) >= 21) { + return; + } + + // Append all the fallback fonts to system fonts + SkTDArray fallbackFonts; + append_system_fallback_font_families(fallbackFonts, basePath); + mixin_vendor_fallback_font_families(fallbackFonts, basePath); + fontFamilies.append(fallbackFonts.size(), fallbackFonts.begin()); +} + +void SkFontMgr_Android_Parser::GetCustomFontFamilies(SkTDArray& fontFamilies, + const SkString& basePath, + const char* fontsXml, + const char* fallbackFontsXml, + const char* langFallbackFontsDir) +{ + if (fontsXml) { + parse_config_file(fontsXml, fontFamilies, basePath, false); + } + if (fallbackFontsXml) { + parse_config_file(fallbackFontsXml, fontFamilies, basePath, true); + } + if (langFallbackFontsDir) { + append_fallback_font_families_for_locale(fontFamilies, + langFallbackFontsDir, + basePath); + } +} + +SkLanguage SkLanguage::getParent() const { + SkASSERT(!fTag.isEmpty()); + const char* tag = fTag.c_str(); + + // strip off the rightmost "-.*" + const char* parentTagEnd = strrchr(tag, '-'); + if (parentTagEnd == nullptr) { + return SkLanguage(); + } + size_t parentTagLen = parentTagEnd - tag; + return SkLanguage(tag, parentTagLen); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_android_parser.h b/gfx/skia/skia/src/ports/SkFontMgr_android_parser.h new file mode 100644 index 0000000000..9d639a4302 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_android_parser.h @@ -0,0 +1,216 @@ +/* + * Copyright 2011 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_android_parser_DEFINED +#define SkFontMgr_android_parser_DEFINED + +#include "include/core/SkFontMgr.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTDArray.h" +#include "src/core/SkTHash.h" + +#include +#include + +/** \class SkLanguage + + The SkLanguage class represents a human written language, and is used by + text draw operations to determine which glyph to draw when drawing + characters with variants (ie Han-derived characters). +*/ +class SkLanguage { +public: + SkLanguage() { } + SkLanguage(const SkString& tag) : fTag(tag) { } + SkLanguage(const char* tag) : fTag(tag) { } + SkLanguage(const char* tag, size_t len) : fTag(tag, len) { } + SkLanguage(const SkLanguage& b) : fTag(b.fTag) { } + + /** Gets a BCP 47 language identifier for this SkLanguage. + @return a BCP 47 language identifier representing this language + */ + const SkString& getTag() const { return fTag; } + + /** Performs BCP 47 fallback to return an SkLanguage one step more general. + @return an SkLanguage one step more general + */ + SkLanguage getParent() const; + + bool operator==(const SkLanguage& b) const { + return fTag == b.fTag; + } + bool operator!=(const SkLanguage& b) const { + return fTag != b.fTag; + } + SkLanguage& operator=(const SkLanguage& b) { + fTag = b.fTag; + return *this; + } + +private: + //! BCP 47 language identifier + SkString fTag; +}; + +enum FontVariants { + kDefault_FontVariant = 0x01, + kCompact_FontVariant = 0x02, + kElegant_FontVariant = 0x04, + kLast_FontVariant = kElegant_FontVariant, +}; +typedef uint32_t FontVariant; + +// Must remain trivially movable (can be memmoved). +struct FontFileInfo { + FontFileInfo() : fIndex(0), fWeight(0), fStyle(Style::kAuto) { } + + SkString fFileName; + int fIndex; + int fWeight; + enum class Style { kAuto, kNormal, kItalic } fStyle; + SkTArray fVariationDesignPosition; +}; + +/** + * A font family provides one or more names for a collection of fonts, each of + * which has a different style (normal, italic) or weight (thin, light, bold, + * etc). + * Some fonts may occur in compact variants for use in the user interface. + * Android distinguishes "fallback" fonts to support non-ASCII character sets. + */ +struct FontFamily { + FontFamily(const SkString& basePath, bool isFallbackFont) + : fVariant(kDefault_FontVariant) + , fOrder(-1) + , fIsFallbackFont(isFallbackFont) + , fBasePath(basePath) + { } + + SkTArray fNames; + SkTArray fFonts; + SkTArray fLanguages; + SkTHashMap> fallbackFamilies; + FontVariant fVariant; + int fOrder; // internal to the parser, not useful to users. + bool fIsFallbackFont; + SkString fFallbackFor; + const SkString fBasePath; +}; + +namespace SkFontMgr_Android_Parser { + +/** Parses system font configuration files and appends result to fontFamilies. */ +void GetSystemFontFamilies(SkTDArray& fontFamilies); + +/** Parses font configuration files and appends result to fontFamilies. */ +void GetCustomFontFamilies(SkTDArray& fontFamilies, + const SkString& basePath, + const char* fontsXml, + const char* fallbackFontsXml, + const char* langFallbackFontsDir = nullptr); + +} // namespace SkFontMgr_Android_Parser + + +/** Parses a null terminated string into an integer type, checking for overflow. + * http://www.w3.org/TR/html-markup/datatypes.html#common.data.integer.non-negative-def + * + * If the string cannot be parsed into 'value', returns false and does not change 'value'. + */ +template bool parse_non_negative_integer(const char* s, T* value) { + static_assert(std::numeric_limits::is_integer, "T_must_be_integer"); + + if (*s == '\0') { + return false; + } + + const T nMax = std::numeric_limits::max() / 10; + const T dMax = std::numeric_limits::max() - (nMax * 10); + T n = 0; + for (; *s; ++s) { + // Check if digit + if (*s < '0' || '9' < *s) { + return false; + } + T d = *s - '0'; + // Check for overflow + if (n > nMax || (n == nMax && d > dMax)) { + return false; + } + n = (n * 10) + d; + } + *value = n; + return true; +} + +/** Parses a null terminated string into a signed fixed point value with bias N. + * + * Like http://www.w3.org/TR/html-markup/datatypes.html#common.data.float-def , + * but may start with '.' and does not support 'e'. '-?((:digit:+(.:digit:+)?)|(.:digit:+))' + * + * Checks for overflow. + * Low bit rounding is not defined (is currently truncate). + * Bias (N) required to allow for the sign bit and 4 bits of integer. + * + * If the string cannot be parsed into 'value', returns false and does not change 'value'. + */ +template bool parse_fixed(const char* s, T* value) { + static_assert(std::numeric_limits::is_integer, "T_must_be_integer"); + static_assert(std::numeric_limits::is_signed, "T_must_be_signed"); + static_assert(sizeof(T) * CHAR_BIT - N >= 5, "N_must_leave_four_bits_plus_sign"); + + bool negate = false; + if (*s == '-') { + ++s; + negate = true; + } + if (*s == '\0') { + return false; + } + + const T nMax = (std::numeric_limits::max() >> N) / 10; + const T dMax = (std::numeric_limits::max() >> N) - (nMax * 10); + T n = 0; + T frac = 0; + for (; *s; ++s) { + // Check if digit + if (*s < '0' || '9' < *s) { + // If it wasn't a digit, check if it is a '.' followed by something. + if (*s != '.' || s[1] == '\0') { + return false; + } + // Find the end, verify digits. + for (++s; *s; ++s) { + if (*s < '0' || '9' < *s) { + return false; + } + } + // Read back toward the '.'. + for (--s; *s != '.'; --s) { + T d = *s - '0'; + frac = (frac + (d << N)) / 10; // This requires four bits overhead. + } + break; + } + T d = *s - '0'; + // Check for overflow + if (n > nMax || (n == nMax && d > dMax)) { + return false; + } + n = (n * 10) + d; + } + if (negate) { + n = -n; + frac = -frac; + } + *value = SkLeftShift(n, N) + frac; + return true; +} + +#endif /* SkFontMgr_android_parser_DEFINED */ diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom.cpp b/gfx/skia/skia/src/ports/SkFontMgr_custom.cpp new file mode 100644 index 0000000000..54ea68e7a7 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom.cpp @@ -0,0 +1,228 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontArguments.h" +#include "include/core/SkFontMgr.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkFontDescriptor.h" +#include "src/ports/SkFontHost_FreeType_common.h" +#include "src/ports/SkFontMgr_custom.h" + +#include +#include + +using namespace skia_private; + +class SkData; + +SkTypeface_Custom::SkTypeface_Custom(const SkFontStyle& style, bool isFixedPitch, + bool sysFont, const SkString familyName, int index) + : INHERITED(style, isFixedPitch) + , fIsSysFont(sysFont), fFamilyName(familyName), fIndex(index) +{ } + +bool SkTypeface_Custom::isSysFont() const { return fIsSysFont; } + +void SkTypeface_Custom::onGetFamilyName(SkString* familyName) const { + *familyName = fFamilyName; +} + +void SkTypeface_Custom::onGetFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const { + desc->setFamilyName(fFamilyName.c_str()); + desc->setStyle(this->fontStyle()); + desc->setFactoryId(SkTypeface_FreeType::FactoryId); + *isLocal = !this->isSysFont(); +} + +int SkTypeface_Custom::getIndex() const { return fIndex; } + + +SkTypeface_Empty::SkTypeface_Empty() : INHERITED(SkFontStyle(), false, true, SkString(), 0) {} + +std::unique_ptr SkTypeface_Empty::onOpenStream(int*) const { return nullptr; } + +sk_sp SkTypeface_Empty::onMakeClone(const SkFontArguments& args) const { + return sk_ref_sp(this); +} + +std::unique_ptr SkTypeface_Empty::onMakeFontData() const { return nullptr; } + +SkTypeface_File::SkTypeface_File(const SkFontStyle& style, bool isFixedPitch, bool sysFont, + const SkString familyName, const char path[], int index) + : INHERITED(style, isFixedPitch, sysFont, familyName, index) + , fPath(path) +{ } + +std::unique_ptr SkTypeface_File::onOpenStream(int* ttcIndex) const { + *ttcIndex = this->getIndex(); + return SkStream::MakeFromFile(fPath.c_str()); +} + +sk_sp SkTypeface_File::onMakeClone(const SkFontArguments& args) const { + std::unique_ptr data = this->cloneFontData(args); + if (!data) { + return nullptr; + } + + SkString familyName; + this->getFamilyName(&familyName); + + return sk_make_sp(std::move(data), + familyName, + this->fontStyle(), + this->isFixedPitch()); +} + +std::unique_ptr SkTypeface_File::onMakeFontData() const { + int index; + std::unique_ptr stream(this->onOpenStream(&index)); + if (!stream) { + return nullptr; + } + return std::make_unique(std::move(stream), index, 0, nullptr, 0, nullptr, 0); +} + +/////////////////////////////////////////////////////////////////////////////// + +SkFontStyleSet_Custom::SkFontStyleSet_Custom(const SkString familyName) : fFamilyName(familyName) {} + +void SkFontStyleSet_Custom::appendTypeface(sk_sp typeface) { + fStyles.emplace_back(std::move(typeface)); +} + +int SkFontStyleSet_Custom::count() { + return fStyles.size(); +} + +void SkFontStyleSet_Custom::getStyle(int index, SkFontStyle* style, SkString* name) { + SkASSERT(index < fStyles.size()); + if (style) { + *style = fStyles[index]->fontStyle(); + } + if (name) { + name->reset(); + } +} + +SkTypeface* SkFontStyleSet_Custom::createTypeface(int index) { + SkASSERT(index < fStyles.size()); + return SkRef(fStyles[index].get()); +} + +SkTypeface* SkFontStyleSet_Custom::matchStyle(const SkFontStyle& pattern) { + return this->matchStyleCSS3(pattern); +} + +SkString SkFontStyleSet_Custom::getFamilyName() { return fFamilyName; } + + +SkFontMgr_Custom::SkFontMgr_Custom(const SystemFontLoader& loader) : fDefaultFamily(nullptr) { + loader.loadSystemFonts(fScanner, &fFamilies); + + // Try to pick a default font. + static const char* defaultNames[] = { + "Arial", "Verdana", "Times New Roman", "Droid Sans", "DejaVu Serif", nullptr + }; + for (size_t i = 0; i < std::size(defaultNames); ++i) { + sk_sp set(this->onMatchFamily(defaultNames[i])); + if (nullptr == set) { + continue; + } + + sk_sp tf(set->matchStyle(SkFontStyle(SkFontStyle::kNormal_Weight, + SkFontStyle::kNormal_Width, + SkFontStyle::kUpright_Slant))); + if (nullptr == tf) { + continue; + } + + fDefaultFamily = set.get(); + break; + } + if (nullptr == fDefaultFamily) { + fDefaultFamily = fFamilies[0].get(); + } +} + +int SkFontMgr_Custom::onCountFamilies() const { + return fFamilies.size(); +} + +void SkFontMgr_Custom::onGetFamilyName(int index, SkString* familyName) const { + SkASSERT(index < fFamilies.size()); + familyName->set(fFamilies[index]->getFamilyName()); +} + +SkFontStyleSet_Custom* SkFontMgr_Custom::onCreateStyleSet(int index) const { + SkASSERT(index < fFamilies.size()); + return SkRef(fFamilies[index].get()); +} + +SkFontStyleSet_Custom* SkFontMgr_Custom::onMatchFamily(const char familyName[]) const { + for (int i = 0; i < fFamilies.size(); ++i) { + if (fFamilies[i]->getFamilyName().equals(familyName)) { + return SkRef(fFamilies[i].get()); + } + } + return nullptr; +} + +SkTypeface* SkFontMgr_Custom::onMatchFamilyStyle(const char familyName[], + const SkFontStyle& fontStyle) const +{ + sk_sp sset(this->matchFamily(familyName)); + return sset->matchStyle(fontStyle); +} + +SkTypeface* SkFontMgr_Custom::onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const +{ + return nullptr; +} + +sk_sp SkFontMgr_Custom::onMakeFromData(sk_sp data, int ttcIndex) const { + return this->makeFromStream(std::make_unique(std::move(data)), ttcIndex); +} + +sk_sp SkFontMgr_Custom::onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const { + return this->makeFromStream(std::move(stream), SkFontArguments().setCollectionIndex(ttcIndex)); +} + +sk_sp SkFontMgr_Custom::onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const { + return SkTypeface_FreeType::MakeFromStream(std::move(stream), args); +} + +sk_sp SkFontMgr_Custom::onMakeFromFile(const char path[], int ttcIndex) const { + std::unique_ptr stream = SkStream::MakeFromFile(path); + return stream ? this->makeFromStream(std::move(stream), ttcIndex) : nullptr; +} + +sk_sp SkFontMgr_Custom::onLegacyMakeTypeface(const char familyName[], + SkFontStyle style) const { + sk_sp tf; + + if (familyName) { + tf.reset(this->onMatchFamilyStyle(familyName, style)); + } + + if (nullptr == tf) { + tf.reset(fDefaultFamily->matchStyle(style)); + } + + return tf; +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom.h b/gfx/skia/skia/src/ports/SkFontMgr_custom.h new file mode 100644 index 0000000000..d867f51773 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom.h @@ -0,0 +1,142 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkFontMgr_custom_DEFINED +#define SkFontMgr_custom_DEFINED + +#include "include/core/SkFontMgr.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTArray.h" +#include "src/ports/SkFontHost_FreeType_common.h" + +class SkData; +class SkFontDescriptor; +class SkStreamAsset; +class SkTypeface; + +/** The base SkTypeface implementation for the custom font manager. */ +class SkTypeface_Custom : public SkTypeface_FreeType { +public: + SkTypeface_Custom(const SkFontStyle& style, bool isFixedPitch, + bool sysFont, const SkString familyName, int index); + bool isSysFont() const; + +protected: + void onGetFamilyName(SkString* familyName) const override; + void onGetFontDescriptor(SkFontDescriptor* desc, bool* isLocal) const override; + int getIndex() const; + +private: + const bool fIsSysFont; + const SkString fFamilyName; + const int fIndex; + + using INHERITED = SkTypeface_FreeType; +}; + +/** The empty SkTypeface implementation for the custom font manager. + * Used as the last resort fallback typeface. + */ +class SkTypeface_Empty : public SkTypeface_Custom { +public: + SkTypeface_Empty() ; + +protected: + std::unique_ptr onOpenStream(int*) const override; + sk_sp onMakeClone(const SkFontArguments& args) const override; + std::unique_ptr onMakeFontData() const override; + +private: + using INHERITED = SkTypeface_Custom; +}; + +/** The file SkTypeface implementation for the custom font manager. */ +class SkTypeface_File : public SkTypeface_Custom { +public: + SkTypeface_File(const SkFontStyle& style, bool isFixedPitch, bool sysFont, + const SkString familyName, const char path[], int index); + +protected: + std::unique_ptr onOpenStream(int* ttcIndex) const override; + sk_sp onMakeClone(const SkFontArguments& args) const override; + std::unique_ptr onMakeFontData() const override; + +private: + SkString fPath; + + using INHERITED = SkTypeface_Custom; +}; + +/////////////////////////////////////////////////////////////////////////////// + +/** + * SkFontStyleSet_Custom + * + * This class is used by SkFontMgr_Custom to hold SkTypeface_Custom families. + */ +class SkFontStyleSet_Custom : public SkFontStyleSet { +public: + explicit SkFontStyleSet_Custom(const SkString familyName); + + /** Should only be called during the initial build phase. */ + void appendTypeface(sk_sp typeface); + int count() override; + void getStyle(int index, SkFontStyle* style, SkString* name) override; + SkTypeface* createTypeface(int index) override; + SkTypeface* matchStyle(const SkFontStyle& pattern) override; + SkString getFamilyName(); + +private: + SkTArray> fStyles; + SkString fFamilyName; + + friend class SkFontMgr_Custom; +}; + +/** + * SkFontMgr_Custom + * + * This class is essentially a collection of SkFontStyleSet_Custom, + * one SkFontStyleSet_Custom for each family. This class may be modified + * to load fonts from any source by changing the initialization. + */ +class SkFontMgr_Custom : public SkFontMgr { +public: + typedef SkTArray> Families; + class SystemFontLoader { + public: + virtual ~SystemFontLoader() { } + virtual void loadSystemFonts(const SkTypeface_FreeType::Scanner&, Families*) const = 0; + }; + explicit SkFontMgr_Custom(const SystemFontLoader& loader); + +protected: + int onCountFamilies() const override; + void onGetFamilyName(int index, SkString* familyName) const override; + SkFontStyleSet_Custom* onCreateStyleSet(int index) const override; + SkFontStyleSet_Custom* onMatchFamily(const char familyName[]) const override; + SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle& fontStyle) const override; + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override; + sk_sp onMakeFromData(sk_sp data, int ttcIndex) const override; + sk_sp onMakeFromStreamIndex(std::unique_ptr, int ttcIndex) const override; + sk_sp onMakeFromStreamArgs(std::unique_ptr, const SkFontArguments&) const override; + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override; + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle style) const override; + +private: + Families fFamilies; + SkFontStyleSet_Custom* fDefaultFamily; + SkTypeface_FreeType::Scanner fScanner; +}; + +#endif diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom_directory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_custom_directory.cpp new file mode 100644 index 0000000000..bda5681131 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom_directory.cpp @@ -0,0 +1,104 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "include/ports/SkFontMgr_directory.h" +#include "src/core/SkOSFile.h" +#include "src/ports/SkFontMgr_custom.h" +#include "src/utils/SkOSPath.h" + +class DirectorySystemFontLoader : public SkFontMgr_Custom::SystemFontLoader { +public: + DirectorySystemFontLoader(const char* dir) : fBaseDirectory(dir) { } + + void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner, + SkFontMgr_Custom::Families* families) const override + { + load_directory_fonts(scanner, fBaseDirectory, ".ttf", families); + load_directory_fonts(scanner, fBaseDirectory, ".ttc", families); + load_directory_fonts(scanner, fBaseDirectory, ".otf", families); + load_directory_fonts(scanner, fBaseDirectory, ".pfb", families); + + if (families->empty()) { + SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString()); + families->push_back().reset(family); + family->appendTypeface(sk_make_sp()); + } + } + +private: + static SkFontStyleSet_Custom* find_family(SkFontMgr_Custom::Families& families, + const char familyName[]) + { + for (int i = 0; i < families.size(); ++i) { + if (families[i]->getFamilyName().equals(familyName)) { + return families[i].get(); + } + } + return nullptr; + } + + static void load_directory_fonts(const SkTypeface_FreeType::Scanner& scanner, + const SkString& directory, const char* suffix, + SkFontMgr_Custom::Families* families) + { + SkOSFile::Iter iter(directory.c_str(), suffix); + SkString name; + + while (iter.next(&name, false)) { + SkString filename(SkOSPath::Join(directory.c_str(), name.c_str())); + std::unique_ptr stream = SkStream::MakeFromFile(filename.c_str()); + if (!stream) { + // SkDebugf("---- failed to open <%s>\n", filename.c_str()); + continue; + } + + int numFaces; + if (!scanner.recognizedFont(stream.get(), &numFaces)) { + // SkDebugf("---- failed to open <%s> as a font\n", filename.c_str()); + continue; + } + + for (int faceIndex = 0; faceIndex < numFaces; ++faceIndex) { + bool isFixedPitch; + SkString realname; + SkFontStyle style = SkFontStyle(); // avoid uninitialized warning + if (!scanner.scanFont(stream.get(), faceIndex, + &realname, &style, &isFixedPitch, nullptr)) + { + // SkDebugf("---- failed to open <%s> <%d> as a font\n", + // filename.c_str(), faceIndex); + continue; + } + + SkFontStyleSet_Custom* addTo = find_family(*families, realname.c_str()); + if (nullptr == addTo) { + addTo = new SkFontStyleSet_Custom(realname); + families->push_back().reset(addTo); + } + addTo->appendTypeface(sk_make_sp(style, isFixedPitch, true, + realname, filename.c_str(), + faceIndex)); + } + } + + SkOSFile::Iter dirIter(directory.c_str()); + while (dirIter.next(&name, true)) { + if (name.startsWith(".")) { + continue; + } + SkString dirname(SkOSPath::Join(directory.c_str(), name.c_str())); + load_directory_fonts(scanner, dirname, suffix, families); + } + } + + SkString fBaseDirectory; +}; + +SK_API sk_sp SkFontMgr_New_Custom_Directory(const char* dir) { + return sk_make_sp(DirectorySystemFontLoader(dir)); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom_directory_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_custom_directory_factory.cpp new file mode 100644 index 0000000000..f20b1b5bc4 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom_directory_factory.cpp @@ -0,0 +1,21 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/ports/SkFontMgr_directory.h" + +#ifndef SK_FONT_FILE_PREFIX +# if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) +# define SK_FONT_FILE_PREFIX "/System/Library/Fonts/" +# else +# define SK_FONT_FILE_PREFIX "/usr/share/fonts/" +# endif +#endif + +sk_sp SkFontMgr::Factory() { + return SkFontMgr_New_Custom_Directory(SK_FONT_FILE_PREFIX); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom_embedded.cpp b/gfx/skia/skia/src/ports/SkFontMgr_custom_embedded.cpp new file mode 100644 index 0000000000..aae51d0cdd --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom_embedded.cpp @@ -0,0 +1,117 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "include/ports/SkFontMgr_data.h" +#include "src/core/SkFontDescriptor.h" +#include "src/ports/SkFontMgr_custom.h" + +struct SkEmbeddedResource { const uint8_t* data; size_t size; }; +struct SkEmbeddedResourceHeader { const SkEmbeddedResource* entries; int count; }; + +static void load_font_from_data(const SkTypeface_FreeType::Scanner& scanner, + std::unique_ptr stream, int index, + SkFontMgr_Custom::Families* families); + +class EmbeddedSystemFontLoader : public SkFontMgr_Custom::SystemFontLoader { +public: + EmbeddedSystemFontLoader(const SkEmbeddedResourceHeader* header) : fHeader(header) { } + + void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner, + SkFontMgr_Custom::Families* families) const override + { + for (int i = 0; i < fHeader->count; ++i) { + const SkEmbeddedResource& fontEntry = fHeader->entries[i]; + auto stream = std::make_unique(fontEntry.data, fontEntry.size, false); + load_font_from_data(scanner, std::move(stream), i, families); + } + + if (families->empty()) { + SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString()); + families->push_back().reset(family); + family->appendTypeface(sk_make_sp()); + } + } + + const SkEmbeddedResourceHeader* fHeader; +}; + +class DataFontLoader : public SkFontMgr_Custom::SystemFontLoader { +public: + DataFontLoader(sk_sp* datas, int n) : fDatas(datas), fNum(n) { } + + void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner, + SkFontMgr_Custom::Families* families) const override + { + for (int i = 0; i < fNum; ++i) { + auto stream = std::make_unique(fDatas[i]); + load_font_from_data(scanner, std::move(stream), i, families); + } + + if (families->empty()) { + SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString()); + families->push_back().reset(family); + family->appendTypeface(sk_make_sp()); + } + } + + const sk_sp* fDatas; + const int fNum; +}; + +static SkFontStyleSet_Custom* find_family(SkFontMgr_Custom::Families& families, + const char familyName[]) +{ + for (int i = 0; i < families.size(); ++i) { + if (families[i]->getFamilyName().equals(familyName)) { + return families[i].get(); + } + } + return nullptr; +} + +static void load_font_from_data(const SkTypeface_FreeType::Scanner& scanner, + std::unique_ptr stream, int index, + SkFontMgr_Custom::Families* families) +{ + int numFaces; + if (!scanner.recognizedFont(stream.get(), &numFaces)) { + SkDebugf("---- failed to open <%d> as a font\n", index); + return; + } + + for (int faceIndex = 0; faceIndex < numFaces; ++faceIndex) { + bool isFixedPitch; + SkString realname; + SkFontStyle style = SkFontStyle(); // avoid uninitialized warning + if (!scanner.scanFont(stream.get(), faceIndex, + &realname, &style, &isFixedPitch, nullptr)) + { + SkDebugf("---- failed to open <%d> <%d> as a font\n", index, faceIndex); + return; + } + + SkFontStyleSet_Custom* addTo = find_family(*families, realname.c_str()); + if (nullptr == addTo) { + addTo = new SkFontStyleSet_Custom(realname); + families->push_back().reset(addTo); + } + auto data = std::make_unique(stream->duplicate(), faceIndex, 0, + nullptr, 0, nullptr, 0); + addTo->appendTypeface(sk_make_sp( + std::move(data), realname, style, isFixedPitch)); + } +} + +sk_sp SkFontMgr_New_Custom_Embedded(const SkEmbeddedResourceHeader* header) { + return sk_make_sp(EmbeddedSystemFontLoader(header)); +} + +sk_sp SkFontMgr_New_Custom_Data(SkSpan> datas) { + SkASSERT(!datas.empty()); + return sk_make_sp(DataFontLoader(datas.data(), datas.size())); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom_embedded_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_custom_embedded_factory.cpp new file mode 100644 index 0000000000..82e1b842ad --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom_embedded_factory.cpp @@ -0,0 +1,17 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" + +struct SkEmbeddedResource { const uint8_t* data; size_t size; }; +struct SkEmbeddedResourceHeader { const SkEmbeddedResource* entries; int count; }; +sk_sp SkFontMgr_New_Custom_Embedded(const SkEmbeddedResourceHeader* header); + +extern "C" const SkEmbeddedResourceHeader SK_EMBEDDED_FONTS; +sk_sp SkFontMgr::Factory() { + return SkFontMgr_New_Custom_Embedded(&SK_EMBEDDED_FONTS); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom_empty.cpp b/gfx/skia/skia/src/ports/SkFontMgr_custom_empty.cpp new file mode 100644 index 0000000000..0e3e18aefd --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom_empty.cpp @@ -0,0 +1,27 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/ports/SkFontMgr_empty.h" +#include "src/ports/SkFontMgr_custom.h" + +class EmptyFontLoader : public SkFontMgr_Custom::SystemFontLoader { +public: + EmptyFontLoader() { } + + void loadSystemFonts(const SkTypeface_FreeType::Scanner& scanner, + SkFontMgr_Custom::Families* families) const override + { + SkFontStyleSet_Custom* family = new SkFontStyleSet_Custom(SkString()); + families->push_back().reset(family); + family->appendTypeface(sk_make_sp()); + } + +}; + +SK_API sk_sp SkFontMgr_New_Custom_Empty() { + return sk_make_sp(EmptyFontLoader()); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_custom_empty_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_custom_empty_factory.cpp new file mode 100644 index 0000000000..b97c199490 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_custom_empty_factory.cpp @@ -0,0 +1,13 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/ports/SkFontMgr_empty.h" + +sk_sp SkFontMgr::Factory() { + return SkFontMgr_New_Custom_Empty(); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_empty_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_empty_factory.cpp new file mode 100644 index 0000000000..69410c5ef9 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_empty_factory.cpp @@ -0,0 +1,13 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" + +sk_sp SkFontMgr::Factory() { + // Always return nullptr, an empty SkFontMgr will be used. + return nullptr; +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_fontconfig.cpp b/gfx/skia/skia/src/ports/SkFontMgr_fontconfig.cpp new file mode 100644 index 0000000000..89f1b0150a --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_fontconfig.cpp @@ -0,0 +1,948 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkDataTable.h" +#include "include/core/SkFontMgr.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkMath.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkOSFile.h" +#include "src/core/SkTypefaceCache.h" +#include "src/ports/SkFontHost_FreeType_common.h" + +#include +#include + +using namespace skia_private; + +class SkData; + +// FC_POSTSCRIPT_NAME was added with b561ff20 which ended up in 2.10.92 +// Ubuntu 14.04 is on 2.11.0 +// Debian 8 and 9 are on 2.11 +// OpenSUSE Leap 42.1 is on 2.11.0 (42.3 is on 2.11.1) +// Fedora 24 is on 2.11.94 +#ifndef FC_POSTSCRIPT_NAME +# define FC_POSTSCRIPT_NAME "postscriptname" +#endif + +/** Since FontConfig is poorly documented, this gives a high level overview: + * + * FcConfig is a handle to a FontConfig configuration instance. Each 'configuration' is independent + * from any others which may exist. There exists a default global configuration which is created + * and destroyed by FcInit and FcFini, but this default should not normally be used. + * Instead, one should use FcConfigCreate and FcInit* to have a named local state. + * + * FcPatterns are {objectName -> [element]} (maps from object names to a list of elements). + * Each element is some internal data plus an FcValue which is a variant (a union with a type tag). + * Lists of elements are not typed, except by convention. Any collection of FcValues must be + * assumed to be heterogeneous by the code, but the code need not do anything particularly + * interesting if the values go against convention. + * + * Somewhat like DirectWrite, FontConfig supports synthetics through FC_EMBOLDEN and FC_MATRIX. + * Like all synthetic information, such information must be passed with the font data. + */ + +namespace { + +// FontConfig was thread antagonistic until 2.10.91 with known thread safety issues until 2.13.93. +// Before that, lock with a global mutex. +// See https://bug.skia.org/1497 and cl/339089311 for background. +static SkMutex& f_c_mutex() { + static SkMutex& mutex = *(new SkMutex); + return mutex; +} + +class FCLocker { + inline static constexpr int FontConfigThreadSafeVersion = 21393; + + // Assume FcGetVersion() has always been thread safe. + static void lock() SK_NO_THREAD_SAFETY_ANALYSIS { + if (FcGetVersion() < FontConfigThreadSafeVersion) { + f_c_mutex().acquire(); + } + } + static void unlock() SK_NO_THREAD_SAFETY_ANALYSIS { + AssertHeld(); + if (FcGetVersion() < FontConfigThreadSafeVersion) { + f_c_mutex().release(); + } + } + +public: + FCLocker() { lock(); } + ~FCLocker() { unlock(); } + + static void AssertHeld() { SkDEBUGCODE( + if (FcGetVersion() < FontConfigThreadSafeVersion) { + f_c_mutex().assertHeld(); + } + ) } +}; + +} // namespace + +template void FcTDestroy(T* t) { + FCLocker::AssertHeld(); + D(t); +} +template class SkAutoFc + : public SkAutoTCallVProc> { + using inherited = SkAutoTCallVProc>; +public: + SkAutoFc() : SkAutoTCallVProc>( C() ) { + T* obj = this->operator T*(); + SkASSERT_RELEASE(nullptr != obj); + } + explicit SkAutoFc(T* obj) : inherited(obj) {} + SkAutoFc(const SkAutoFc&) = delete; + SkAutoFc(SkAutoFc&& that) : inherited(std::move(that)) {} +}; + +typedef SkAutoFc SkAutoFcCharSet; +typedef SkAutoFc SkAutoFcConfig; +typedef SkAutoFc SkAutoFcFontSet; +typedef SkAutoFc SkAutoFcLangSet; +typedef SkAutoFc SkAutoFcObjectSet; +typedef SkAutoFc SkAutoFcPattern; + +static bool get_bool(FcPattern* pattern, const char object[], bool missing = false) { + FcBool value; + if (FcPatternGetBool(pattern, object, 0, &value) != FcResultMatch) { + return missing; + } + return value; +} + +static int get_int(FcPattern* pattern, const char object[], int missing) { + int value; + if (FcPatternGetInteger(pattern, object, 0, &value) != FcResultMatch) { + return missing; + } + return value; +} + +static const char* get_string(FcPattern* pattern, const char object[], const char* missing = "") { + FcChar8* value; + if (FcPatternGetString(pattern, object, 0, &value) != FcResultMatch) { + return missing; + } + return (const char*)value; +} + +static const FcMatrix* get_matrix(FcPattern* pattern, const char object[]) { + FcMatrix* matrix; + if (FcPatternGetMatrix(pattern, object, 0, &matrix) != FcResultMatch) { + return nullptr; + } + return matrix; +} + +enum SkWeakReturn { + kIsWeak_WeakReturn, + kIsStrong_WeakReturn, + kNoId_WeakReturn +}; +/** Ideally there would exist a call like + * FcResult FcPatternIsWeak(pattern, object, id, FcBool* isWeak); + * Sometime after 2.12.4 FcPatternGetWithBinding was added which can retrieve the binding. + * + * However, there is no such call and as of Fc 2.11.0 even FcPatternEquals ignores the weak bit. + * Currently, the only reliable way of finding the weak bit is by its effect on matching. + * The weak bit only affects the matching of FC_FAMILY and FC_POSTSCRIPT_NAME object values. + * A element with the weak bit is scored after FC_LANG, without the weak bit is scored before. + * Note that the weak bit is stored on the element, not on the value it holds. + */ +static SkWeakReturn is_weak(FcPattern* pattern, const char object[], int id) { + FCLocker::AssertHeld(); + + FcResult result; + + // Create a copy of the pattern with only the value 'pattern'['object'['id']] in it. + // Internally, FontConfig pattern objects are linked lists, so faster to remove from head. + SkAutoFcObjectSet requestedObjectOnly(FcObjectSetBuild(object, nullptr)); + SkAutoFcPattern minimal(FcPatternFilter(pattern, requestedObjectOnly)); + FcBool hasId = true; + for (int i = 0; hasId && i < id; ++i) { + hasId = FcPatternRemove(minimal, object, 0); + } + if (!hasId) { + return kNoId_WeakReturn; + } + FcValue value; + result = FcPatternGet(minimal, object, 0, &value); + if (result != FcResultMatch) { + return kNoId_WeakReturn; + } + while (hasId) { + hasId = FcPatternRemove(minimal, object, 1); + } + + // Create a font set with two patterns. + // 1. the same 'object' as minimal and a lang object with only 'nomatchlang'. + // 2. a different 'object' from minimal and a lang object with only 'matchlang'. + SkAutoFcFontSet fontSet; + + SkAutoFcLangSet strongLangSet; + FcLangSetAdd(strongLangSet, (const FcChar8*)"nomatchlang"); + SkAutoFcPattern strong(FcPatternDuplicate(minimal)); + FcPatternAddLangSet(strong, FC_LANG, strongLangSet); + + SkAutoFcLangSet weakLangSet; + FcLangSetAdd(weakLangSet, (const FcChar8*)"matchlang"); + SkAutoFcPattern weak; + FcPatternAddString(weak, object, (const FcChar8*)"nomatchstring"); + FcPatternAddLangSet(weak, FC_LANG, weakLangSet); + + FcFontSetAdd(fontSet, strong.release()); + FcFontSetAdd(fontSet, weak.release()); + + // Add 'matchlang' to the copy of the pattern. + FcPatternAddLangSet(minimal, FC_LANG, weakLangSet); + + // Run a match against the copy of the pattern. + // If the 'id' was weak, then we should match the pattern with 'matchlang'. + // If the 'id' was strong, then we should match the pattern with 'nomatchlang'. + + // Note that this config is only used for FcFontRenderPrepare, which we don't even want. + // However, there appears to be no way to match/sort without it. + SkAutoFcConfig config; + FcFontSet* fontSets[1] = { fontSet }; + SkAutoFcPattern match(FcFontSetMatch(config, fontSets, std::size(fontSets), + minimal, &result)); + + FcLangSet* matchLangSet; + FcPatternGetLangSet(match, FC_LANG, 0, &matchLangSet); + return FcLangEqual == FcLangSetHasLang(matchLangSet, (const FcChar8*)"matchlang") + ? kIsWeak_WeakReturn : kIsStrong_WeakReturn; +} + +/** Removes weak elements from either FC_FAMILY or FC_POSTSCRIPT_NAME objects in the property. + * This can be quite expensive, and should not be used more than once per font lookup. + * This removes all of the weak elements after the last strong element. + */ +static void remove_weak(FcPattern* pattern, const char object[]) { + FCLocker::AssertHeld(); + + SkAutoFcObjectSet requestedObjectOnly(FcObjectSetBuild(object, nullptr)); + SkAutoFcPattern minimal(FcPatternFilter(pattern, requestedObjectOnly)); + + int lastStrongId = -1; + int numIds; + SkWeakReturn result; + for (int id = 0; ; ++id) { + result = is_weak(minimal, object, 0); + if (kNoId_WeakReturn == result) { + numIds = id; + break; + } + if (kIsStrong_WeakReturn == result) { + lastStrongId = id; + } + SkAssertResult(FcPatternRemove(minimal, object, 0)); + } + + // If they were all weak, then leave the pattern alone. + if (lastStrongId < 0) { + return; + } + + // Remove everything after the last strong. + for (int id = lastStrongId + 1; id < numIds; ++id) { + SkAssertResult(FcPatternRemove(pattern, object, lastStrongId + 1)); + } +} + +static int map_range(SkScalar value, + SkScalar old_min, SkScalar old_max, + SkScalar new_min, SkScalar new_max) +{ + SkASSERT(old_min < old_max); + SkASSERT(new_min <= new_max); + return new_min + ((value - old_min) * (new_max - new_min) / (old_max - old_min)); +} + +struct MapRanges { + SkScalar old_val; + SkScalar new_val; +}; + +static SkScalar map_ranges(SkScalar val, MapRanges const ranges[], int rangesCount) { + // -Inf to [0] + if (val < ranges[0].old_val) { + return ranges[0].new_val; + } + + // Linear from [i] to [i+1] + for (int i = 0; i < rangesCount - 1; ++i) { + if (val < ranges[i+1].old_val) { + return map_range(val, ranges[i].old_val, ranges[i+1].old_val, + ranges[i].new_val, ranges[i+1].new_val); + } + } + + // From [n] to +Inf + // if (fcweight < Inf) + return ranges[rangesCount-1].new_val; +} + +#ifndef FC_WEIGHT_DEMILIGHT +#define FC_WEIGHT_DEMILIGHT 65 +#endif + +static SkFontStyle skfontstyle_from_fcpattern(FcPattern* pattern) { + typedef SkFontStyle SkFS; + + // FcWeightToOpenType was buggy until 2.12.4 + static constexpr MapRanges weightRanges[] = { + { FC_WEIGHT_THIN, SkFS::kThin_Weight }, + { FC_WEIGHT_EXTRALIGHT, SkFS::kExtraLight_Weight }, + { FC_WEIGHT_LIGHT, SkFS::kLight_Weight }, + { FC_WEIGHT_DEMILIGHT, 350 }, + { FC_WEIGHT_BOOK, 380 }, + { FC_WEIGHT_REGULAR, SkFS::kNormal_Weight }, + { FC_WEIGHT_MEDIUM, SkFS::kMedium_Weight }, + { FC_WEIGHT_DEMIBOLD, SkFS::kSemiBold_Weight }, + { FC_WEIGHT_BOLD, SkFS::kBold_Weight }, + { FC_WEIGHT_EXTRABOLD, SkFS::kExtraBold_Weight }, + { FC_WEIGHT_BLACK, SkFS::kBlack_Weight }, + { FC_WEIGHT_EXTRABLACK, SkFS::kExtraBlack_Weight }, + }; + SkScalar weight = map_ranges(get_int(pattern, FC_WEIGHT, FC_WEIGHT_REGULAR), + weightRanges, std::size(weightRanges)); + + static constexpr MapRanges widthRanges[] = { + { FC_WIDTH_ULTRACONDENSED, SkFS::kUltraCondensed_Width }, + { FC_WIDTH_EXTRACONDENSED, SkFS::kExtraCondensed_Width }, + { FC_WIDTH_CONDENSED, SkFS::kCondensed_Width }, + { FC_WIDTH_SEMICONDENSED, SkFS::kSemiCondensed_Width }, + { FC_WIDTH_NORMAL, SkFS::kNormal_Width }, + { FC_WIDTH_SEMIEXPANDED, SkFS::kSemiExpanded_Width }, + { FC_WIDTH_EXPANDED, SkFS::kExpanded_Width }, + { FC_WIDTH_EXTRAEXPANDED, SkFS::kExtraExpanded_Width }, + { FC_WIDTH_ULTRAEXPANDED, SkFS::kUltraExpanded_Width }, + }; + SkScalar width = map_ranges(get_int(pattern, FC_WIDTH, FC_WIDTH_NORMAL), + widthRanges, std::size(widthRanges)); + + SkFS::Slant slant = SkFS::kUpright_Slant; + switch (get_int(pattern, FC_SLANT, FC_SLANT_ROMAN)) { + case FC_SLANT_ROMAN: slant = SkFS::kUpright_Slant; break; + case FC_SLANT_ITALIC : slant = SkFS::kItalic_Slant ; break; + case FC_SLANT_OBLIQUE: slant = SkFS::kOblique_Slant; break; + default: SkASSERT(false); break; + } + + return SkFontStyle(SkScalarRoundToInt(weight), SkScalarRoundToInt(width), slant); +} + +static void fcpattern_from_skfontstyle(SkFontStyle style, FcPattern* pattern) { + FCLocker::AssertHeld(); + + typedef SkFontStyle SkFS; + + // FcWeightFromOpenType was buggy until 2.12.4 + static constexpr MapRanges weightRanges[] = { + { SkFS::kThin_Weight, FC_WEIGHT_THIN }, + { SkFS::kExtraLight_Weight, FC_WEIGHT_EXTRALIGHT }, + { SkFS::kLight_Weight, FC_WEIGHT_LIGHT }, + { 350, FC_WEIGHT_DEMILIGHT }, + { 380, FC_WEIGHT_BOOK }, + { SkFS::kNormal_Weight, FC_WEIGHT_REGULAR }, + { SkFS::kMedium_Weight, FC_WEIGHT_MEDIUM }, + { SkFS::kSemiBold_Weight, FC_WEIGHT_DEMIBOLD }, + { SkFS::kBold_Weight, FC_WEIGHT_BOLD }, + { SkFS::kExtraBold_Weight, FC_WEIGHT_EXTRABOLD }, + { SkFS::kBlack_Weight, FC_WEIGHT_BLACK }, + { SkFS::kExtraBlack_Weight, FC_WEIGHT_EXTRABLACK }, + }; + int weight = map_ranges(style.weight(), weightRanges, std::size(weightRanges)); + + static constexpr MapRanges widthRanges[] = { + { SkFS::kUltraCondensed_Width, FC_WIDTH_ULTRACONDENSED }, + { SkFS::kExtraCondensed_Width, FC_WIDTH_EXTRACONDENSED }, + { SkFS::kCondensed_Width, FC_WIDTH_CONDENSED }, + { SkFS::kSemiCondensed_Width, FC_WIDTH_SEMICONDENSED }, + { SkFS::kNormal_Width, FC_WIDTH_NORMAL }, + { SkFS::kSemiExpanded_Width, FC_WIDTH_SEMIEXPANDED }, + { SkFS::kExpanded_Width, FC_WIDTH_EXPANDED }, + { SkFS::kExtraExpanded_Width, FC_WIDTH_EXTRAEXPANDED }, + { SkFS::kUltraExpanded_Width, FC_WIDTH_ULTRAEXPANDED }, + }; + int width = map_ranges(style.width(), widthRanges, std::size(widthRanges)); + + int slant = FC_SLANT_ROMAN; + switch (style.slant()) { + case SkFS::kUpright_Slant: slant = FC_SLANT_ROMAN ; break; + case SkFS::kItalic_Slant : slant = FC_SLANT_ITALIC ; break; + case SkFS::kOblique_Slant: slant = FC_SLANT_OBLIQUE; break; + default: SkASSERT(false); break; + } + + FcPatternAddInteger(pattern, FC_WEIGHT, weight); + FcPatternAddInteger(pattern, FC_WIDTH , width); + FcPatternAddInteger(pattern, FC_SLANT , slant); +} + +class SkTypeface_fontconfig : public SkTypeface_FreeType { +public: + static sk_sp Make(SkAutoFcPattern pattern, SkString sysroot) { + return sk_sp(new SkTypeface_fontconfig(std::move(pattern), + std::move(sysroot))); + } + mutable SkAutoFcPattern fPattern; // Mutable for passing to FontConfig API. + const SkString fSysroot; + + void onGetFamilyName(SkString* familyName) const override { + *familyName = get_string(fPattern, FC_FAMILY); + } + + void onGetFontDescriptor(SkFontDescriptor* desc, bool* serialize) const override { + // TODO: need to serialize FC_MATRIX and FC_EMBOLDEN + FCLocker lock; + desc->setFamilyName(get_string(fPattern, FC_FAMILY)); + desc->setFullName(get_string(fPattern, FC_FULLNAME)); + desc->setPostscriptName(get_string(fPattern, FC_POSTSCRIPT_NAME)); + desc->setStyle(this->fontStyle()); + desc->setFactoryId(SkTypeface_FreeType::FactoryId); + *serialize = false; + } + + std::unique_ptr onOpenStream(int* ttcIndex) const override { + FCLocker lock; + *ttcIndex = get_int(fPattern, FC_INDEX, 0); + const char* filename = get_string(fPattern, FC_FILE); + // See FontAccessible for note on searching sysroot then non-sysroot path. + SkString resolvedFilename; + if (!fSysroot.isEmpty()) { + resolvedFilename = fSysroot; + resolvedFilename += filename; + if (sk_exists(resolvedFilename.c_str(), kRead_SkFILE_Flag)) { + filename = resolvedFilename.c_str(); + } + } + return SkStream::MakeFromFile(filename); + } + + void onFilterRec(SkScalerContextRec* rec) const override { + // FontConfig provides 10-scale-bitmap-fonts.conf which applies an inverse "pixelsize" + // matrix. It is not known if this .conf is active or not, so it is not clear if + // "pixelsize" should be applied before this matrix. Since using a matrix with a bitmap + // font isn't a great idea, only apply the matrix to outline fonts. + const FcMatrix* fcMatrix = get_matrix(fPattern, FC_MATRIX); + bool fcOutline = get_bool(fPattern, FC_OUTLINE, true); + if (fcOutline && fcMatrix) { + // fPost2x2 is column-major, left handed (y down). + // FcMatrix is column-major, right handed (y up). + SkMatrix fm; + fm.setAll(fcMatrix->xx,-fcMatrix->xy, 0, + -fcMatrix->yx, fcMatrix->yy, 0, + 0 , 0 , 1); + + SkMatrix sm; + rec->getMatrixFrom2x2(&sm); + + sm.preConcat(fm); + rec->fPost2x2[0][0] = sm.getScaleX(); + rec->fPost2x2[0][1] = sm.getSkewX(); + rec->fPost2x2[1][0] = sm.getSkewY(); + rec->fPost2x2[1][1] = sm.getScaleY(); + } + if (get_bool(fPattern, FC_EMBOLDEN)) { + rec->fFlags |= SkScalerContext::kEmbolden_Flag; + } + this->INHERITED::onFilterRec(rec); + } + + std::unique_ptr onGetAdvancedMetrics() const override { + std::unique_ptr info = + this->INHERITED::onGetAdvancedMetrics(); + + // Simulated fonts shouldn't be considered to be of the type of their data. + if (get_matrix(fPattern, FC_MATRIX) || get_bool(fPattern, FC_EMBOLDEN)) { + info->fType = SkAdvancedTypefaceMetrics::kOther_Font; + } + return info; + } + + sk_sp onMakeClone(const SkFontArguments& args) const override { + std::unique_ptr data = this->cloneFontData(args); + if (!data) { + return nullptr; + } + + // TODO: need to clone FC_MATRIX and FC_EMBOLDEN + SkString familyName; + this->getFamilyName(&familyName); + return sk_make_sp( + std::move(data), familyName, this->fontStyle(), this->isFixedPitch()); + } + + std::unique_ptr onMakeFontData() const override { + int index; + std::unique_ptr stream(this->onOpenStream(&index)); + if (!stream) { + return nullptr; + } + // TODO: FC_VARIABLE and FC_FONT_VARIATIONS + return std::make_unique(std::move(stream), index, 0, nullptr, 0, nullptr, 0); + } + + ~SkTypeface_fontconfig() override { + // Hold the lock while unrefing the pattern. + FCLocker lock; + fPattern.reset(); + } + +private: + SkTypeface_fontconfig(SkAutoFcPattern pattern, SkString sysroot) + : INHERITED(skfontstyle_from_fcpattern(pattern), + FC_PROPORTIONAL != get_int(pattern, FC_SPACING, FC_PROPORTIONAL)) + , fPattern(std::move(pattern)) + , fSysroot(std::move(sysroot)) + { } + + using INHERITED = SkTypeface_FreeType; +}; + +class SkFontMgr_fontconfig : public SkFontMgr { + mutable SkAutoFcConfig fFC; // Only mutable to avoid const cast when passed to FontConfig API. + const SkString fSysroot; + const sk_sp fFamilyNames; + const SkTypeface_FreeType::Scanner fScanner; + + class StyleSet : public SkFontStyleSet { + public: + StyleSet(sk_sp parent, SkAutoFcFontSet fontSet) + : fFontMgr(std::move(parent)), fFontSet(std::move(fontSet)) + { } + + ~StyleSet() override { + // Hold the lock while unrefing the font set. + FCLocker lock; + fFontSet.reset(); + } + + int count() override { return fFontSet->nfont; } + + void getStyle(int index, SkFontStyle* style, SkString* styleName) override { + if (index < 0 || fFontSet->nfont <= index) { + return; + } + + FCLocker lock; + if (style) { + *style = skfontstyle_from_fcpattern(fFontSet->fonts[index]); + } + if (styleName) { + *styleName = get_string(fFontSet->fonts[index], FC_STYLE); + } + } + + SkTypeface* createTypeface(int index) override { + if (index < 0 || fFontSet->nfont <= index) { + return nullptr; + } + SkAutoFcPattern match([this, &index]() { + FCLocker lock; + FcPatternReference(fFontSet->fonts[index]); + return fFontSet->fonts[index]; + }()); + return fFontMgr->createTypefaceFromFcPattern(std::move(match)).release(); + } + + SkTypeface* matchStyle(const SkFontStyle& style) override { + SkAutoFcPattern match([this, &style]() { + FCLocker lock; + + SkAutoFcPattern pattern; + fcpattern_from_skfontstyle(style, pattern); + FcConfigSubstitute(fFontMgr->fFC, pattern, FcMatchPattern); + FcDefaultSubstitute(pattern); + + FcResult result; + FcFontSet* fontSets[1] = { fFontSet }; + return FcFontSetMatch(fFontMgr->fFC, + fontSets, std::size(fontSets), + pattern, &result); + + }()); + return fFontMgr->createTypefaceFromFcPattern(std::move(match)).release(); + } + + private: + sk_sp fFontMgr; + SkAutoFcFontSet fFontSet; + }; + + static bool FindName(const SkTDArray& list, const char* str) { + int count = list.size(); + for (int i = 0; i < count; ++i) { + if (!strcmp(list[i], str)) { + return true; + } + } + return false; + } + + static sk_sp GetFamilyNames(FcConfig* fcconfig) { + FCLocker lock; + + SkTDArray names; + SkTDArray sizes; + + static const FcSetName fcNameSet[] = { FcSetSystem, FcSetApplication }; + for (int setIndex = 0; setIndex < (int)std::size(fcNameSet); ++setIndex) { + // Return value of FcConfigGetFonts must not be destroyed. + FcFontSet* allFonts(FcConfigGetFonts(fcconfig, fcNameSet[setIndex])); + if (nullptr == allFonts) { + continue; + } + + for (int fontIndex = 0; fontIndex < allFonts->nfont; ++fontIndex) { + FcPattern* current = allFonts->fonts[fontIndex]; + for (int id = 0; ; ++id) { + FcChar8* fcFamilyName; + FcResult result = FcPatternGetString(current, FC_FAMILY, id, &fcFamilyName); + if (FcResultNoId == result) { + break; + } + if (FcResultMatch != result) { + continue; + } + const char* familyName = reinterpret_cast(fcFamilyName); + if (familyName && !FindName(names, familyName)) { + *names.append() = familyName; + *sizes.append() = strlen(familyName) + 1; + } + } + } + } + + return SkDataTable::MakeCopyArrays((void const *const *)names.begin(), + sizes.begin(), names.size()); + } + + static bool FindByFcPattern(SkTypeface* cached, void* ctx) { + SkTypeface_fontconfig* cshFace = static_cast(cached); + FcPattern* ctxPattern = static_cast(ctx); + return FcTrue == FcPatternEqual(cshFace->fPattern, ctxPattern); + } + + mutable SkMutex fTFCacheMutex; + mutable SkTypefaceCache fTFCache; + /** Creates a typeface using a typeface cache. + * @param pattern a complete pattern from FcFontRenderPrepare. + */ + sk_sp createTypefaceFromFcPattern(SkAutoFcPattern pattern) const { + if (!pattern) { + return nullptr; + } + // Cannot hold FCLocker when calling fTFCache.add; an evicted typeface may need to lock. + // Must hold fTFCacheMutex when interacting with fTFCache. + SkAutoMutexExclusive ama(fTFCacheMutex); + sk_sp face = [&]() { + FCLocker lock; + sk_sp face = fTFCache.findByProcAndRef(FindByFcPattern, pattern); + if (face) { + pattern.reset(); + } + return face; + }(); + if (!face) { + face = SkTypeface_fontconfig::Make(std::move(pattern), fSysroot); + if (face) { + // Cannot hold FCLocker in fTFCache.add; evicted typefaces may need to lock. + fTFCache.add(face); + } + } + return face; + } + +public: + /** Takes control of the reference to 'config'. */ + explicit SkFontMgr_fontconfig(FcConfig* config) + : fFC(config ? config : FcInitLoadConfigAndFonts()) + , fSysroot(reinterpret_cast(FcConfigGetSysRoot(fFC))) + , fFamilyNames(GetFamilyNames(fFC)) { } + + ~SkFontMgr_fontconfig() override { + // Hold the lock while unrefing the config. + FCLocker lock; + fFC.reset(); + } + +protected: + int onCountFamilies() const override { + return fFamilyNames->count(); + } + + void onGetFamilyName(int index, SkString* familyName) const override { + familyName->set(fFamilyNames->atStr(index)); + } + + SkFontStyleSet* onCreateStyleSet(int index) const override { + return this->onMatchFamily(fFamilyNames->atStr(index)); + } + + /** True if any string object value in the font is the same + * as a string object value in the pattern. + */ + static bool AnyMatching(FcPattern* font, FcPattern* pattern, const char* object) { + FcChar8* fontString; + FcChar8* patternString; + FcResult result; + // Set an arbitrary limit on the number of pattern object values to consider. + // TODO: re-write this to avoid N*M + static const int maxId = 16; + for (int patternId = 0; patternId < maxId; ++patternId) { + result = FcPatternGetString(pattern, object, patternId, &patternString); + if (FcResultNoId == result) { + break; + } + if (FcResultMatch != result) { + continue; + } + for (int fontId = 0; fontId < maxId; ++fontId) { + result = FcPatternGetString(font, object, fontId, &fontString); + if (FcResultNoId == result) { + break; + } + if (FcResultMatch != result) { + continue; + } + if (0 == FcStrCmpIgnoreCase(patternString, fontString)) { + return true; + } + } + } + return false; + } + + bool FontAccessible(FcPattern* font) const { + // FontConfig can return fonts which are unreadable. + const char* filename = get_string(font, FC_FILE, nullptr); + if (nullptr == filename) { + return false; + } + + // When sysroot was implemented in e96d7760886a3781a46b3271c76af99e15cb0146 (before 2.11.0) + // it was broken; mostly fixed in d17f556153fbaf8fe57fdb4fc1f0efa4313f0ecf (after 2.11.1). + // This leaves Debian 8 and 9 with broken support for this feature. + // As a result, this feature should not be used until at least 2.11.91. + // The broken support is mostly around not making all paths relative to the sysroot. + // However, even at 2.13.1 it is possible to get a mix of sysroot and non-sysroot paths, + // as any added file path not lexically starting with the sysroot will be unchanged. + // To allow users to add local app files outside the sysroot, + // prefer the sysroot but also look without the sysroot. + if (!fSysroot.isEmpty()) { + SkString resolvedFilename; + resolvedFilename = fSysroot; + resolvedFilename += filename; + if (sk_exists(resolvedFilename.c_str(), kRead_SkFILE_Flag)) { + return true; + } + } + return sk_exists(filename, kRead_SkFILE_Flag); + } + + static bool FontFamilyNameMatches(FcPattern* font, FcPattern* pattern) { + return AnyMatching(font, pattern, FC_FAMILY); + } + + static bool FontContainsCharacter(FcPattern* font, uint32_t character) { + FcResult result; + FcCharSet* matchCharSet; + for (int charSetId = 0; ; ++charSetId) { + result = FcPatternGetCharSet(font, FC_CHARSET, charSetId, &matchCharSet); + if (FcResultNoId == result) { + break; + } + if (FcResultMatch != result) { + continue; + } + if (FcCharSetHasChar(matchCharSet, character)) { + return true; + } + } + return false; + } + + SkFontStyleSet* onMatchFamily(const char familyName[]) const override { + if (!familyName) { + return nullptr; + } + FCLocker lock; + + SkAutoFcPattern pattern; + FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName); + FcConfigSubstitute(fFC, pattern, FcMatchPattern); + FcDefaultSubstitute(pattern); + + FcPattern* matchPattern; + SkAutoFcPattern strongPattern(nullptr); + if (familyName) { + strongPattern.reset(FcPatternDuplicate(pattern)); + remove_weak(strongPattern, FC_FAMILY); + matchPattern = strongPattern; + } else { + matchPattern = pattern; + } + + SkAutoFcFontSet matches; + // TODO: Some families have 'duplicates' due to symbolic links. + // The patterns are exactly the same except for the FC_FILE. + // It should be possible to collapse these patterns by normalizing. + static const FcSetName fcNameSet[] = { FcSetSystem, FcSetApplication }; + for (int setIndex = 0; setIndex < (int)std::size(fcNameSet); ++setIndex) { + // Return value of FcConfigGetFonts must not be destroyed. + FcFontSet* allFonts(FcConfigGetFonts(fFC, fcNameSet[setIndex])); + if (nullptr == allFonts) { + continue; + } + + for (int fontIndex = 0; fontIndex < allFonts->nfont; ++fontIndex) { + FcPattern* font = allFonts->fonts[fontIndex]; + if (FontAccessible(font) && FontFamilyNameMatches(font, matchPattern)) { + FcFontSetAdd(matches, FcFontRenderPrepare(fFC, pattern, font)); + } + } + } + + return new StyleSet(sk_ref_sp(this), std::move(matches)); + } + + SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle& style) const override + { + SkAutoFcPattern font([this, &familyName, &style]() { + FCLocker lock; + + SkAutoFcPattern pattern; + FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName); + fcpattern_from_skfontstyle(style, pattern); + FcConfigSubstitute(fFC, pattern, FcMatchPattern); + FcDefaultSubstitute(pattern); + + // We really want to match strong (preferred) and same (acceptable) only here. + // If a family name was specified, assume that any weak matches after the last strong + // match are weak (default) and ignore them. + // After substitution the pattern for 'sans-serif' looks like "wwwwwwwwwwwwwwswww" where + // there are many weak but preferred names, followed by defaults. + // So it is possible to have weakly matching but preferred names. + // In aliases, bindings are weak by default, so this is easy and common. + // If no family name was specified, we'll probably only get weak matches, but that's ok. + FcPattern* matchPattern; + SkAutoFcPattern strongPattern(nullptr); + if (familyName) { + strongPattern.reset(FcPatternDuplicate(pattern)); + remove_weak(strongPattern, FC_FAMILY); + matchPattern = strongPattern; + } else { + matchPattern = pattern; + } + + FcResult result; + SkAutoFcPattern font(FcFontMatch(fFC, pattern, &result)); + if (!font || !FontAccessible(font) || !FontFamilyNameMatches(font, matchPattern)) { + font.reset(); + } + return font; + }()); + return createTypefaceFromFcPattern(std::move(font)).release(); + } + + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle& style, + const char* bcp47[], + int bcp47Count, + SkUnichar character) const override + { + SkAutoFcPattern font([&](){ + FCLocker lock; + + SkAutoFcPattern pattern; + if (familyName) { + FcValue familyNameValue; + familyNameValue.type = FcTypeString; + familyNameValue.u.s = reinterpret_cast(familyName); + FcPatternAddWeak(pattern, FC_FAMILY, familyNameValue, FcFalse); + } + fcpattern_from_skfontstyle(style, pattern); + + SkAutoFcCharSet charSet; + FcCharSetAddChar(charSet, character); + FcPatternAddCharSet(pattern, FC_CHARSET, charSet); + + if (bcp47Count > 0) { + SkASSERT(bcp47); + SkAutoFcLangSet langSet; + for (int i = bcp47Count; i --> 0;) { + FcLangSetAdd(langSet, (const FcChar8*)bcp47[i]); + } + FcPatternAddLangSet(pattern, FC_LANG, langSet); + } + + FcConfigSubstitute(fFC, pattern, FcMatchPattern); + FcDefaultSubstitute(pattern); + + FcResult result; + SkAutoFcPattern font(FcFontMatch(fFC, pattern, &result)); + if (!font || !FontAccessible(font) || !FontContainsCharacter(font, character)) { + font.reset(); + } + return font; + }()); + return createTypefaceFromFcPattern(std::move(font)).release(); + } + + sk_sp onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const override { + return this->makeFromStream(std::move(stream), + SkFontArguments().setCollectionIndex(ttcIndex)); + } + + sk_sp onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const override { + const size_t length = stream->getLength(); + if (length <= 0 || (1u << 30) < length) { + return nullptr; + } + return SkTypeface_FreeType::MakeFromStream(std::move(stream), args); + } + + sk_sp onMakeFromData(sk_sp data, int ttcIndex) const override { + return this->makeFromStream(std::make_unique(std::move(data)), ttcIndex); + } + + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override { + return this->makeFromStream(SkStream::MakeFromFile(path), ttcIndex); + } + + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle style) const override { + sk_sp typeface(this->matchFamilyStyle(familyName, style)); + if (typeface) { + return typeface; + } + + return sk_sp(this->matchFamilyStyle(nullptr, style)); + } +}; + +SK_API sk_sp SkFontMgr_New_FontConfig(FcConfig* fc) { + return sk_make_sp(fc); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_fontconfig_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_fontconfig_factory.cpp new file mode 100644 index 0000000000..a011ec5c1e --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_fontconfig_factory.cpp @@ -0,0 +1,14 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFontMgr.h" +#include "include/core/SkTypes.h" +#include "include/ports/SkFontMgr_fontconfig.h" + +sk_sp SkFontMgr::Factory() { + return SkFontMgr_New_FontConfig(nullptr); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_fuchsia.cpp b/gfx/skia/skia/src/ports/SkFontMgr_fuchsia.cpp new file mode 100644 index 0000000000..87a0f88b76 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_fuchsia.cpp @@ -0,0 +1,515 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/ports/SkFontMgr_fuchsia.h" + +#include +#include +#include +#include +#include + +#include "src/core/SkFontDescriptor.h" +#include "src/ports/SkFontMgr_custom.h" + +#include "include/core/SkFontMgr.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkThreadAnnotations.h" +#include "src/core/SkTypefaceCache.h" + +using namespace skia_private; + +// SkFuchsiaFontDataCache keep track of SkData created from `fuchsia::mem::Buffer` where each buffer +// is identified with a unique identifier. It allows to share the same SkData instances between all +// SkTypeface instances created from the same buffer. +class SkFuchsiaFontDataCache : public SkRefCnt { +public: + SkFuchsiaFontDataCache() = default; + ~SkFuchsiaFontDataCache() { SkASSERT(fBuffers.empty()); } + + sk_sp GetOrCreateSkData(int bufferId, const fuchsia::mem::Buffer& buffer); + +private: + struct ReleaseSkDataContext { + sk_sp fCache; + int fBufferId; + }; + + static void ReleaseSkData(const void* buffer, void* context); + void OnBufferDeleted(int bufferId); + + SkMutex fMutex; + std::unordered_map fBuffers SK_GUARDED_BY(fMutex); +}; + +sk_sp SkFuchsiaFontDataCache::GetOrCreateSkData(int bufferId, + const fuchsia::mem::Buffer& buffer) { + SkAutoMutexExclusive mutexLock(fMutex); + + auto iter = fBuffers.find(bufferId); + if (iter != fBuffers.end()) { + return sk_ref_sp(iter->second); + } + auto font_mgr = sk_ref_sp(this); + + uint64_t size = buffer.size; + uintptr_t mapped_addr = 0; + zx_status_t status = + zx::vmar::root_self()->map(ZX_VM_PERM_READ, 0, buffer.vmo, 0, size, &mapped_addr); + if (status != ZX_OK) return nullptr; + + auto context = new ReleaseSkDataContext{sk_ref_sp(this), bufferId}; + auto data = SkData::MakeWithProc( + reinterpret_cast(mapped_addr), size, ReleaseSkData, context); + SkASSERT(data); + + fBuffers[bufferId] = data.get(); + return data; +} + +void SkFuchsiaFontDataCache::OnBufferDeleted(int bufferId) { + zx_vaddr_t unmap_addr; + size_t unmap_size; + { + SkAutoMutexExclusive mutexLock(fMutex); + auto it = fBuffers.find(bufferId); + SkASSERT(it != fBuffers.end()); + unmap_addr = reinterpret_cast(it->second->data()); + unmap_size = it->second->size(); + fBuffers.erase(it); + } + + zx::vmar::root_self()->unmap(unmap_addr, unmap_size); +} + +// static +void SkFuchsiaFontDataCache::ReleaseSkData(const void* buffer, void* context) { + auto releaseSkDataContext = reinterpret_cast(context); + releaseSkDataContext->fCache->OnBufferDeleted(releaseSkDataContext->fBufferId); + delete releaseSkDataContext; +} + +fuchsia::fonts::Slant SkToFuchsiaSlant(SkFontStyle::Slant slant) { + switch (slant) { + case SkFontStyle::kOblique_Slant: + return fuchsia::fonts::Slant::OBLIQUE; + case SkFontStyle::kItalic_Slant: + return fuchsia::fonts::Slant::ITALIC; + case SkFontStyle::kUpright_Slant: + default: + return fuchsia::fonts::Slant::UPRIGHT; + } +} + +SkFontStyle::Slant FuchsiaToSkSlant(fuchsia::fonts::Slant slant) { + switch (slant) { + case fuchsia::fonts::Slant::OBLIQUE: + return SkFontStyle::kOblique_Slant; + case fuchsia::fonts::Slant::ITALIC: + return SkFontStyle::kItalic_Slant; + case fuchsia::fonts::Slant::UPRIGHT: + default: + return SkFontStyle::kUpright_Slant; + } +} + +fuchsia::fonts::Width SkToFuchsiaWidth(SkFontStyle::Width width) { + switch (width) { + case SkFontStyle::Width::kUltraCondensed_Width: + return fuchsia::fonts::Width::ULTRA_CONDENSED; + case SkFontStyle::Width::kExtraCondensed_Width: + return fuchsia::fonts::Width::EXTRA_CONDENSED; + case SkFontStyle::Width::kCondensed_Width: + return fuchsia::fonts::Width::CONDENSED; + case SkFontStyle::Width::kSemiCondensed_Width: + return fuchsia::fonts::Width::SEMI_CONDENSED; + case SkFontStyle::Width::kNormal_Width: + return fuchsia::fonts::Width::NORMAL; + case SkFontStyle::Width::kSemiExpanded_Width: + return fuchsia::fonts::Width::SEMI_EXPANDED; + case SkFontStyle::Width::kExpanded_Width: + return fuchsia::fonts::Width::EXPANDED; + case SkFontStyle::Width::kExtraExpanded_Width: + return fuchsia::fonts::Width::EXTRA_EXPANDED; + case SkFontStyle::Width::kUltraExpanded_Width: + return fuchsia::fonts::Width::ULTRA_EXPANDED; + } +} + +// Tries to convert the given integer Skia style width value to the Fuchsia equivalent. +// +// On success, returns true. On failure, returns false, and `outFuchsiaWidth` is left untouched. +bool SkToFuchsiaWidth(int skWidth, fuchsia::fonts::Width* outFuchsiaWidth) { + if (skWidth < SkFontStyle::Width::kUltraCondensed_Width || + skWidth > SkFontStyle::Width::kUltraExpanded_Width) { + return false; + } + auto typedSkWidth = static_cast(skWidth); + *outFuchsiaWidth = SkToFuchsiaWidth(typedSkWidth); + return true; +} + +SkFontStyle::Width FuchsiaToSkWidth(fuchsia::fonts::Width width) { + switch (width) { + case fuchsia::fonts::Width::ULTRA_CONDENSED: + return SkFontStyle::Width::kUltraCondensed_Width; + case fuchsia::fonts::Width::EXTRA_CONDENSED: + return SkFontStyle::Width::kExtraCondensed_Width; + case fuchsia::fonts::Width::CONDENSED: + return SkFontStyle::Width::kCondensed_Width; + case fuchsia::fonts::Width::SEMI_CONDENSED: + return SkFontStyle::Width::kSemiCondensed_Width; + case fuchsia::fonts::Width::NORMAL: + return SkFontStyle::Width::kNormal_Width; + case fuchsia::fonts::Width::SEMI_EXPANDED: + return SkFontStyle::Width::kSemiExpanded_Width; + case fuchsia::fonts::Width::EXPANDED: + return SkFontStyle::Width::kExpanded_Width; + case fuchsia::fonts::Width::EXTRA_EXPANDED: + return SkFontStyle::Width::kExtraExpanded_Width; + case fuchsia::fonts::Width::ULTRA_EXPANDED: + return SkFontStyle::Width::kUltraExpanded_Width; + } +} + +fuchsia::fonts::Style2 SkToFuchsiaStyle(const SkFontStyle& style) { + fuchsia::fonts::Style2 fuchsiaStyle; + fuchsiaStyle.set_slant(SkToFuchsiaSlant(style.slant())).set_weight(style.weight()); + + fuchsia::fonts::Width fuchsiaWidth = fuchsia::fonts::Width::NORMAL; + if (SkToFuchsiaWidth(style.width(), &fuchsiaWidth)) { + fuchsiaStyle.set_width(fuchsiaWidth); + } + + return fuchsiaStyle; +} + +constexpr struct { + const char* fName; + fuchsia::fonts::GenericFontFamily fGenericFontFamily; +} kGenericFontFamiliesByName[] = {{"serif", fuchsia::fonts::GenericFontFamily::SERIF}, + {"sans", fuchsia::fonts::GenericFontFamily::SANS_SERIF}, + {"sans-serif", fuchsia::fonts::GenericFontFamily::SANS_SERIF}, + {"mono", fuchsia::fonts::GenericFontFamily::MONOSPACE}, + {"monospace", fuchsia::fonts::GenericFontFamily::MONOSPACE}, + {"cursive", fuchsia::fonts::GenericFontFamily::CURSIVE}, + {"fantasy", fuchsia::fonts::GenericFontFamily::FANTASY}, + {"system-ui", fuchsia::fonts::GenericFontFamily::SYSTEM_UI}, + {"emoji", fuchsia::fonts::GenericFontFamily::EMOJI}, + {"math", fuchsia::fonts::GenericFontFamily::MATH}, + {"fangsong", fuchsia::fonts::GenericFontFamily::FANGSONG}}; + +// Tries to find a generic font family with the given name. If none is found, returns false. +bool GetGenericFontFamilyByName(const char* name, + fuchsia::fonts::GenericFontFamily* outGenericFamily) { + if (!name) return false; + for (auto& genericFamily : kGenericFontFamiliesByName) { + if (strcasecmp(genericFamily.fName, name) == 0) { + *outGenericFamily = genericFamily.fGenericFontFamily; + return true; + } + } + return false; +} + +struct TypefaceId { + uint32_t bufferId; + uint32_t ttcIndex; + + bool operator==(TypefaceId& other) { + return std::tie(bufferId, ttcIndex) == std::tie(other.bufferId, other.ttcIndex); + } +} + +constexpr kNullTypefaceId = {0xFFFFFFFF, 0xFFFFFFFF}; + +class SkTypeface_Fuchsia : public SkTypeface_FreeTypeStream { +public: + SkTypeface_Fuchsia(std::unique_ptr fontData, const SkFontStyle& style, + bool isFixedPitch, const SkString familyName, TypefaceId id) + : SkTypeface_FreeTypeStream(std::move(fontData), familyName, style, isFixedPitch) + , fId(id) {} + + TypefaceId id() { return fId; } + +private: + TypefaceId fId; +}; + +sk_sp CreateTypefaceFromSkStream(std::unique_ptr stream, + const SkFontArguments& args, TypefaceId id) { + using Scanner = SkTypeface_FreeType::Scanner; + Scanner scanner; + bool isFixedPitch; + SkFontStyle style; + SkString name; + Scanner::AxisDefinitions axisDefinitions; + if (!scanner.scanFont(stream.get(), args.getCollectionIndex(), &name, &style, &isFixedPitch, + &axisDefinitions)) { + return nullptr; + } + + const SkFontArguments::VariationPosition position = args.getVariationDesignPosition(); + AutoSTMalloc<4, SkFixed> axisValues(axisDefinitions.size()); + Scanner::computeAxisValues(axisDefinitions, position, axisValues, name); + + auto fontData = std::make_unique( + std::move(stream), args.getCollectionIndex(), args.getPalette().index, + axisValues.get(), axisDefinitions.size(), + args.getPalette().overrides, args.getPalette().overrideCount); + return sk_make_sp(std::move(fontData), style, isFixedPitch, name, id); +} + +sk_sp CreateTypefaceFromSkData(sk_sp data, TypefaceId id) { + return CreateTypefaceFromSkStream(std::make_unique(std::move(data)), + SkFontArguments().setCollectionIndex(id.ttcIndex), id); +} + +class SkFontMgr_Fuchsia final : public SkFontMgr { +public: + SkFontMgr_Fuchsia(fuchsia::fonts::ProviderSyncPtr provider); + ~SkFontMgr_Fuchsia() override; + +protected: + // SkFontMgr overrides. + int onCountFamilies() const override; + void onGetFamilyName(int index, SkString* familyName) const override; + SkFontStyleSet* onMatchFamily(const char familyName[]) const override; + SkFontStyleSet* onCreateStyleSet(int index) const override; + SkTypeface* onMatchFamilyStyle(const char familyName[], const SkFontStyle&) const override; + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override; + sk_sp onMakeFromData(sk_sp, int ttcIndex) const override; + sk_sp onMakeFromStreamIndex(std::unique_ptr, + int ttcIndex) const override; + sk_sp onMakeFromStreamArgs(std::unique_ptr, + const SkFontArguments&) const override; + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override; + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle) const override; + +private: + friend class SkFontStyleSet_Fuchsia; + + sk_sp FetchTypeface(const char familyName[], const SkFontStyle& style, + const char* bcp47[], int bcp47Count, SkUnichar character, + bool allow_fallback, bool exact_style_match) const; + + sk_sp GetOrCreateTypeface(TypefaceId id, const fuchsia::mem::Buffer& buffer) const; + + mutable fuchsia::fonts::ProviderSyncPtr fFontProvider; + + sk_sp fBufferCache; + + mutable SkMutex fCacheMutex; + mutable SkTypefaceCache fTypefaceCache SK_GUARDED_BY(fCacheMutex); +}; + +class SkFontStyleSet_Fuchsia : public SkFontStyleSet { +public: + SkFontStyleSet_Fuchsia(sk_sp font_manager, std::string familyName, + std::vector styles) + : fFontManager(font_manager), fFamilyName(familyName), fStyles(styles) {} + + ~SkFontStyleSet_Fuchsia() override = default; + + int count() override { return fStyles.size(); } + + void getStyle(int index, SkFontStyle* style, SkString* styleName) override { + SkASSERT(index >= 0 && index < static_cast(fStyles.size())); + if (style) *style = fStyles[index]; + + // We don't have style names. Return an empty name. + if (styleName) styleName->reset(); + } + + SkTypeface* createTypeface(int index) override { + SkASSERT(index >= 0 && index < static_cast(fStyles.size())); + + if (fTypefaces.empty()) fTypefaces.resize(fStyles.size()); + + if (!fTypefaces[index]) { + fTypefaces[index] = fFontManager->FetchTypeface( + fFamilyName.c_str(), fStyles[index], /*bcp47=*/nullptr, + /*bcp47Count=*/0, /*character=*/0, + /*allow_fallback=*/false, /*exact_style_match=*/true); + } + + return SkSafeRef(fTypefaces[index].get()); + } + + SkTypeface* matchStyle(const SkFontStyle& pattern) override { return matchStyleCSS3(pattern); } + +private: + sk_sp fFontManager; + std::string fFamilyName; + std::vector fStyles; + std::vector> fTypefaces; +}; + +SkFontMgr_Fuchsia::SkFontMgr_Fuchsia(fuchsia::fonts::ProviderSyncPtr provider) + : fFontProvider(std::move(provider)), fBufferCache(sk_make_sp()) {} + +SkFontMgr_Fuchsia::~SkFontMgr_Fuchsia() = default; + +int SkFontMgr_Fuchsia::onCountFamilies() const { + // Family enumeration is not supported. + return 0; +} + +void SkFontMgr_Fuchsia::onGetFamilyName(int index, SkString* familyName) const { + // Family enumeration is not supported. + familyName->reset(); +} + +SkFontStyleSet* SkFontMgr_Fuchsia::onCreateStyleSet(int index) const { + // Family enumeration is not supported. + return nullptr; +} + +SkFontStyleSet* SkFontMgr_Fuchsia::onMatchFamily(const char familyName[]) const { + fuchsia::fonts::FamilyName typedFamilyName; + typedFamilyName.name = familyName; + + fuchsia::fonts::FontFamilyInfo familyInfo; + int result = fFontProvider->GetFontFamilyInfo(typedFamilyName, &familyInfo); + if (result != ZX_OK || !familyInfo.has_styles() || familyInfo.styles().empty()) return nullptr; + + std::vector styles; + for (auto& style : familyInfo.styles()) { + styles.push_back(SkFontStyle(style.weight(), FuchsiaToSkWidth(style.width()), + FuchsiaToSkSlant(style.slant()))); + } + + return new SkFontStyleSet_Fuchsia(sk_ref_sp(this), familyInfo.name().name, std::move(styles)); +} + +SkTypeface* SkFontMgr_Fuchsia::onMatchFamilyStyle(const char familyName[], + const SkFontStyle& style) const { + sk_sp typeface = + FetchTypeface(familyName, style, /*bcp47=*/nullptr, + /*bcp47Count=*/0, /*character=*/0, + /*allow_fallback=*/false, /*exact_style_match=*/false); + return typeface.release(); +} + +SkTypeface* SkFontMgr_Fuchsia::onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle& style, + const char* bcp47[], int bcp47Count, + SkUnichar character) const { + sk_sp typeface = + FetchTypeface(familyName, style, bcp47, bcp47Count, character, /*allow_fallback=*/true, + /*exact_style_match=*/false); + return typeface.release(); +} + +sk_sp SkFontMgr_Fuchsia::onMakeFromData(sk_sp data, int ttcIndex) const { + return makeFromStream(std::make_unique(std::move(data)), ttcIndex); +} + +sk_sp SkFontMgr_Fuchsia::onMakeFromStreamIndex(std::unique_ptr asset, + int ttcIndex) const { + return makeFromStream(std::move(asset), SkFontArguments().setCollectionIndex(ttcIndex)); +} + +sk_sp SkFontMgr_Fuchsia::onMakeFromStreamArgs(std::unique_ptr asset, + const SkFontArguments& args) const { + return CreateTypefaceFromSkStream(std::move(asset), args, kNullTypefaceId); +} + +sk_sp SkFontMgr_Fuchsia::onMakeFromFile(const char path[], int ttcIndex) const { + return makeFromStream(std::make_unique(path), ttcIndex); +} + +sk_sp SkFontMgr_Fuchsia::onLegacyMakeTypeface(const char familyName[], + SkFontStyle style) const { + return sk_sp(matchFamilyStyle(familyName, style)); +} + +sk_sp SkFontMgr_Fuchsia::FetchTypeface(const char familyName[], + const SkFontStyle& style, const char* bcp47[], + int bcp47Count, SkUnichar character, + bool allow_fallback, + bool exact_style_match) const { + fuchsia::fonts::TypefaceQuery query; + query.set_style(SkToFuchsiaStyle(style)); + + if (bcp47Count > 0) { + std::vector languages{}; + for (int i = 0; i < bcp47Count; i++) { + fuchsia::intl::LocaleId localeId; + localeId.id = bcp47[i]; + languages.push_back(localeId); + } + query.set_languages(std::move(languages)); + } + + if (character) { + query.set_code_points({static_cast(character)}); + } + + // If family name is not specified or is a generic family name (e.g. "serif"), then enable + // fallback; otherwise, pass the family name as is. + fuchsia::fonts::GenericFontFamily genericFontFamily = + fuchsia::fonts::GenericFontFamily::SANS_SERIF; + bool isGenericFontFamily = GetGenericFontFamilyByName(familyName, &genericFontFamily); + if (!familyName || *familyName == '\0' || isGenericFontFamily) { + if (isGenericFontFamily) { + query.set_fallback_family(genericFontFamily); + } + allow_fallback = true; + } else { + fuchsia::fonts::FamilyName typedFamilyName{}; + typedFamilyName.name = familyName; + query.set_family(typedFamilyName); + } + + fuchsia::fonts::TypefaceRequestFlags flags{}; + if (!allow_fallback) flags |= fuchsia::fonts::TypefaceRequestFlags::EXACT_FAMILY; + if (exact_style_match) flags |= fuchsia::fonts::TypefaceRequestFlags::EXACT_STYLE; + + fuchsia::fonts::TypefaceRequest request; + request.set_query(std::move(query)); + request.set_flags(flags); + + fuchsia::fonts::TypefaceResponse response; + int result = fFontProvider->GetTypeface(std::move(request), &response); + if (result != ZX_OK) return nullptr; + + // The service may return an empty response if there is no font matching the request. + if (response.IsEmpty()) return nullptr; + + return GetOrCreateTypeface(TypefaceId{response.buffer_id(), response.font_index()}, + response.buffer()); +} + +static bool FindByTypefaceId(SkTypeface* cachedTypeface, void* ctx) { + SkTypeface_Fuchsia* cachedFuchsiaTypeface = static_cast(cachedTypeface); + TypefaceId* id = static_cast(ctx); + + return cachedFuchsiaTypeface->id() == *id; +} + +sk_sp SkFontMgr_Fuchsia::GetOrCreateTypeface(TypefaceId id, + const fuchsia::mem::Buffer& buffer) const { + SkAutoMutexExclusive mutexLock(fCacheMutex); + + sk_sp cached = fTypefaceCache.findByProcAndRef(FindByTypefaceId, &id); + if (cached) return cached; + + sk_sp data = fBufferCache->GetOrCreateSkData(id.bufferId, buffer); + if (!data) return nullptr; + + auto result = CreateTypefaceFromSkData(std::move(data), id); + fTypefaceCache.add(result); + return result; +} + +SK_API sk_sp SkFontMgr_New_Fuchsia(fuchsia::fonts::ProviderSyncPtr provider) { + return sk_make_sp(std::move(provider)); +} diff --git a/gfx/skia/skia/src/ports/SkFontMgr_mac_ct.cpp b/gfx/skia/skia/src/ports/SkFontMgr_mac_ct.cpp new file mode 100644 index 0000000000..f6b3ad61d1 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_mac_ct.cpp @@ -0,0 +1,532 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#ifdef SK_BUILD_FOR_MAC +#import +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#include +#include +#include +#include +#endif + +#include "include/core/SkData.h" +#include "include/core/SkFontArguments.h" +#include "include/core/SkFontMgr.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/ports/SkFontMgr_mac_ct.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkUTF.h" +#include "src/core/SkFontDescriptor.h" +#include "src/ports/SkTypeface_mac_ct.h" + +#include +#include + +using namespace skia_private; + +#if (defined(SK_BUILD_FOR_IOS) && defined(__IPHONE_14_0) && \ + __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_14_0) || \ + (defined(SK_BUILD_FOR_MAC) && defined(__MAC_11_0) && \ + __MAC_OS_VERSION_MIN_REQUIRED >= __MAC_11_0) + +static uint32_t SkGetCoreTextVersion() { + // If compiling for iOS 14.0+ or macOS 11.0+, the CoreText version number + // must be derived from the OS version number. + static const uint32_t kCoreTextVersionNEWER = 0x000D0000; + return kCoreTextVersionNEWER; +} + +#else + +static uint32_t SkGetCoreTextVersion() { + // Check for CoreText availability before calling CTGetCoreTextVersion(). + static const bool kCoreTextIsAvailable = (&CTGetCoreTextVersion != nullptr); + if (kCoreTextIsAvailable) { + return CTGetCoreTextVersion(); + } + + // Default to a value that's smaller than any known CoreText version. + static const uint32_t kCoreTextVersionUNKNOWN = 0; + return kCoreTextVersionUNKNOWN; +} + +#endif + +static SkUniqueCFRef make_CFString(const char s[]) { + return SkUniqueCFRef(CFStringCreateWithCString(nullptr, s, kCFStringEncodingUTF8)); +} + +/** Creates a typeface from a descriptor, searching the cache. */ +static sk_sp create_from_desc(CTFontDescriptorRef desc) { + SkUniqueCFRef ctFont(CTFontCreateWithFontDescriptor(desc, 0, nullptr)); + if (!ctFont) { + return nullptr; + } + + return SkTypeface_Mac::Make(std::move(ctFont), OpszVariation(), nullptr); +} + +static SkUniqueCFRef create_descriptor(const char familyName[], + const SkFontStyle& style) { + SkUniqueCFRef cfAttributes( + CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + + SkUniqueCFRef cfTraits( + CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + + if (!cfAttributes || !cfTraits) { + return nullptr; + } + + // TODO(crbug.com/1018581) Some CoreText versions have errant behavior when + // certain traits set. Temporary workaround to omit specifying trait for those + // versions. + // Long term solution will involve serializing typefaces instead of relying upon + // this to match between processes. + // + // Compare CoreText.h in an up to date SDK for where these values come from. + static const uint32_t kSkiaLocalCTVersionNumber10_14 = 0x000B0000; + static const uint32_t kSkiaLocalCTVersionNumber10_15 = 0x000C0000; + + // CTFontTraits (symbolic) + // macOS 14 and iOS 12 seem to behave badly when kCTFontSymbolicTrait is set. + // macOS 15 yields LastResort font instead of a good default font when + // kCTFontSymbolicTrait is set. + if (SkGetCoreTextVersion() < kSkiaLocalCTVersionNumber10_14) { + CTFontSymbolicTraits ctFontTraits = 0; + if (style.weight() >= SkFontStyle::kBold_Weight) { + ctFontTraits |= kCTFontBoldTrait; + } + if (style.slant() != SkFontStyle::kUpright_Slant) { + ctFontTraits |= kCTFontItalicTrait; + } + SkUniqueCFRef cfFontTraits( + CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &ctFontTraits)); + if (cfFontTraits) { + CFDictionaryAddValue(cfTraits.get(), kCTFontSymbolicTrait, cfFontTraits.get()); + } + } + + // CTFontTraits (weight) + CGFloat ctWeight = SkCTFontCTWeightForCSSWeight(style.weight()); + SkUniqueCFRef cfFontWeight( + CFNumberCreate(kCFAllocatorDefault, kCFNumberCGFloatType, &ctWeight)); + if (cfFontWeight) { + CFDictionaryAddValue(cfTraits.get(), kCTFontWeightTrait, cfFontWeight.get()); + } + // CTFontTraits (width) + CGFloat ctWidth = SkCTFontCTWidthForCSSWidth(style.width()); + SkUniqueCFRef cfFontWidth( + CFNumberCreate(kCFAllocatorDefault, kCFNumberCGFloatType, &ctWidth)); + if (cfFontWidth) { + CFDictionaryAddValue(cfTraits.get(), kCTFontWidthTrait, cfFontWidth.get()); + } + // CTFontTraits (slant) + // macOS 15 behaves badly when kCTFontSlantTrait is set. + if (SkGetCoreTextVersion() != kSkiaLocalCTVersionNumber10_15) { + CGFloat ctSlant = style.slant() == SkFontStyle::kUpright_Slant ? 0 : 1; + SkUniqueCFRef cfFontSlant( + CFNumberCreate(kCFAllocatorDefault, kCFNumberCGFloatType, &ctSlant)); + if (cfFontSlant) { + CFDictionaryAddValue(cfTraits.get(), kCTFontSlantTrait, cfFontSlant.get()); + } + } + // CTFontTraits + CFDictionaryAddValue(cfAttributes.get(), kCTFontTraitsAttribute, cfTraits.get()); + + // CTFontFamilyName + if (familyName) { + SkUniqueCFRef cfFontName = make_CFString(familyName); + if (cfFontName) { + CFDictionaryAddValue(cfAttributes.get(), kCTFontFamilyNameAttribute, cfFontName.get()); + } + } + + return SkUniqueCFRef( + CTFontDescriptorCreateWithAttributes(cfAttributes.get())); +} + +// Same as the above function except style is included so we can +// compare whether the created font conforms to the style. If not, we need +// to recreate the font with symbolic traits. This is needed due to MacOS 10.11 +// font creation problem https://bugs.chromium.org/p/skia/issues/detail?id=8447. +static sk_sp create_from_desc_and_style(CTFontDescriptorRef desc, + const SkFontStyle& style) { + SkUniqueCFRef ctFont(CTFontCreateWithFontDescriptor(desc, 0, nullptr)); + if (!ctFont) { + return nullptr; + } + + const CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(ctFont.get()); + CTFontSymbolicTraits expected_traits = traits; + if (style.slant() != SkFontStyle::kUpright_Slant) { + expected_traits |= kCTFontItalicTrait; + } + if (style.weight() >= SkFontStyle::kBold_Weight) { + expected_traits |= kCTFontBoldTrait; + } + + if (expected_traits != traits) { + SkUniqueCFRef ctNewFont(CTFontCreateCopyWithSymbolicTraits( + ctFont.get(), 0, nullptr, expected_traits, expected_traits)); + if (ctNewFont) { + ctFont = std::move(ctNewFont); + } + } + + return SkTypeface_Mac::Make(std::move(ctFont), OpszVariation(), nullptr); +} + +/** Creates a typeface from a name, searching the cache. */ +static sk_sp create_from_name(const char familyName[], const SkFontStyle& style) { + SkUniqueCFRef desc = create_descriptor(familyName, style); + if (!desc) { + return nullptr; + } + return create_from_desc_and_style(desc.get(), style); +} + +static const char* map_css_names(const char* name) { + static const struct { + const char* fFrom; // name the caller specified + const char* fTo; // "canonical" name we map to + } gPairs[] = { + { "sans-serif", "Helvetica" }, + { "serif", "Times" }, + { "monospace", "Courier" } + }; + + for (size_t i = 0; i < std::size(gPairs); i++) { + if (strcmp(name, gPairs[i].fFrom) == 0) { + return gPairs[i].fTo; + } + } + return name; // no change +} + +namespace { + +static bool find_desc_str(CTFontDescriptorRef desc, CFStringRef name, SkString* value) { + SkUniqueCFRef ref((CFStringRef)CTFontDescriptorCopyAttribute(desc, name)); + if (!ref) { + return false; + } + SkStringFromCFString(ref.get(), value); + return true; +} + +static inline int sqr(int value) { + SkASSERT(SkAbs32(value) < 0x7FFF); // check for overflow + return value * value; +} + +// We normalize each axis (weight, width, italic) to be base-900 +static int compute_metric(const SkFontStyle& a, const SkFontStyle& b) { + return sqr(a.weight() - b.weight()) + + sqr((a.width() - b.width()) * 100) + + sqr((a.slant() != b.slant()) * 900); +} + +static SkUniqueCFRef name_required() { + CFStringRef set_values[] = {kCTFontFamilyNameAttribute}; + return SkUniqueCFRef(CFSetCreate(kCFAllocatorDefault, + reinterpret_cast(set_values), std::size(set_values), + &kCFTypeSetCallBacks)); +} + +class SkFontStyleSet_Mac : public SkFontStyleSet { +public: + SkFontStyleSet_Mac(CTFontDescriptorRef desc) + : fArray(CTFontDescriptorCreateMatchingFontDescriptors(desc, name_required().get())) + , fCount(0) + { + if (!fArray) { + fArray.reset(CFArrayCreate(nullptr, nullptr, 0, nullptr)); + } + fCount = SkToInt(CFArrayGetCount(fArray.get())); + } + + int count() override { + return fCount; + } + + void getStyle(int index, SkFontStyle* style, SkString* name) override { + SkASSERT((unsigned)index < (unsigned)fCount); + CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray.get(), index); + if (style) { + *style = SkCTFontDescriptorGetSkFontStyle(desc, false); + } + if (name) { + if (!find_desc_str(desc, kCTFontStyleNameAttribute, name)) { + name->reset(); + } + } + } + + SkTypeface* createTypeface(int index) override { + SkASSERT((unsigned)index < (unsigned)CFArrayGetCount(fArray.get())); + CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray.get(), index); + + return create_from_desc(desc).release(); + } + + SkTypeface* matchStyle(const SkFontStyle& pattern) override { + if (0 == fCount) { + return nullptr; + } + return create_from_desc(findMatchingDesc(pattern)).release(); + } + +private: + SkUniqueCFRef fArray; + int fCount; + + CTFontDescriptorRef findMatchingDesc(const SkFontStyle& pattern) const { + int bestMetric = SK_MaxS32; + CTFontDescriptorRef bestDesc = nullptr; + + for (int i = 0; i < fCount; ++i) { + CTFontDescriptorRef desc = (CTFontDescriptorRef)CFArrayGetValueAtIndex(fArray.get(), i); + int metric = compute_metric(pattern, SkCTFontDescriptorGetSkFontStyle(desc, false)); + if (0 == metric) { + return desc; + } + if (metric < bestMetric) { + bestMetric = metric; + bestDesc = desc; + } + } + SkASSERT(bestDesc); + return bestDesc; + } +}; + +SkUniqueCFRef SkCopyAvailableFontFamilyNames(CTFontCollectionRef collection) { + // Create a CFArray of all available font descriptors. + SkUniqueCFRef descriptors( + CTFontCollectionCreateMatchingFontDescriptors(collection)); + + // Copy the font family names of the font descriptors into a CFSet. + auto addDescriptorFamilyNameToSet = [](const void* value, void* context) -> void { + CTFontDescriptorRef descriptor = static_cast(value); + CFMutableSetRef familyNameSet = static_cast(context); + SkUniqueCFRef familyName( + CTFontDescriptorCopyAttribute(descriptor, kCTFontFamilyNameAttribute)); + if (familyName) { + CFSetAddValue(familyNameSet, familyName.get()); + } + }; + SkUniqueCFRef familyNameSet( + CFSetCreateMutable(kCFAllocatorDefault, 0, &kCFTypeSetCallBacks)); + CFArrayApplyFunction(descriptors.get(), CFRangeMake(0, CFArrayGetCount(descriptors.get())), + addDescriptorFamilyNameToSet, familyNameSet.get()); + + // Get the set of family names into an array; this does not retain. + CFIndex count = CFSetGetCount(familyNameSet.get()); + std::unique_ptr familyNames(new const void*[count]); + CFSetGetValues(familyNameSet.get(), familyNames.get()); + + // Sort the array of family names (to match CTFontManagerCopyAvailableFontFamilyNames). + std::sort(familyNames.get(), familyNames.get() + count, [](const void* a, const void* b){ + return CFStringCompare((CFStringRef)a, (CFStringRef)b, 0) == kCFCompareLessThan; + }); + + // Copy family names into a CFArray; this does retain. + return SkUniqueCFRef( + CFArrayCreate(kCFAllocatorDefault, familyNames.get(), count, &kCFTypeArrayCallBacks)); +} + +/** Use CTFontManagerCopyAvailableFontFamilyNames if available, simulate if not. */ +SkUniqueCFRef SkCTFontManagerCopyAvailableFontFamilyNames() { +#ifdef SK_BUILD_FOR_IOS + using CTFontManagerCopyAvailableFontFamilyNamesProc = CFArrayRef (*)(void); + CTFontManagerCopyAvailableFontFamilyNamesProc ctFontManagerCopyAvailableFontFamilyNames; + *(void**)(&ctFontManagerCopyAvailableFontFamilyNames) = + dlsym(RTLD_DEFAULT, "CTFontManagerCopyAvailableFontFamilyNames"); + if (ctFontManagerCopyAvailableFontFamilyNames) { + return SkUniqueCFRef(ctFontManagerCopyAvailableFontFamilyNames()); + } + SkUniqueCFRef collection( + CTFontCollectionCreateFromAvailableFonts(nullptr)); + return SkUniqueCFRef(SkCopyAvailableFontFamilyNames(collection.get())); +#else + return SkUniqueCFRef(CTFontManagerCopyAvailableFontFamilyNames()); +#endif +} + +} // namespace + +class SkFontMgr_Mac : public SkFontMgr { + SkUniqueCFRef fNames; + int fCount; + + CFStringRef getFamilyNameAt(int index) const { + SkASSERT((unsigned)index < (unsigned)fCount); + return (CFStringRef)CFArrayGetValueAtIndex(fNames.get(), index); + } + + static SkFontStyleSet* CreateSet(CFStringRef cfFamilyName) { + SkUniqueCFRef cfAttr( + CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + + CFDictionaryAddValue(cfAttr.get(), kCTFontFamilyNameAttribute, cfFamilyName); + + SkUniqueCFRef desc( + CTFontDescriptorCreateWithAttributes(cfAttr.get())); + return new SkFontStyleSet_Mac(desc.get()); + } + +public: + SkUniqueCFRef fFontCollection; + SkFontMgr_Mac(CTFontCollectionRef fontCollection) + : fNames(fontCollection ? SkCopyAvailableFontFamilyNames(fontCollection) + : SkCTFontManagerCopyAvailableFontFamilyNames()) + , fCount(fNames ? SkToInt(CFArrayGetCount(fNames.get())) : 0) + , fFontCollection(fontCollection ? (CTFontCollectionRef)CFRetain(fontCollection) + : CTFontCollectionCreateFromAvailableFonts(nullptr)) + {} + +protected: + int onCountFamilies() const override { + return fCount; + } + + void onGetFamilyName(int index, SkString* familyName) const override { + if ((unsigned)index < (unsigned)fCount) { + SkStringFromCFString(this->getFamilyNameAt(index), familyName); + } else { + familyName->reset(); + } + } + + SkFontStyleSet* onCreateStyleSet(int index) const override { + if ((unsigned)index >= (unsigned)fCount) { + return nullptr; + } + return CreateSet(this->getFamilyNameAt(index)); + } + + SkFontStyleSet* onMatchFamily(const char familyName[]) const override { + if (!familyName) { + return nullptr; + } + SkUniqueCFRef cfName = make_CFString(familyName); + return CreateSet(cfName.get()); + } + + SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle& style) const override { + SkUniqueCFRef reqDesc = create_descriptor(familyName, style); + if (!familyName) { + return create_from_desc(reqDesc.get()).release(); + } + SkUniqueCFRef resolvedDesc( + CTFontDescriptorCreateMatchingFontDescriptor(reqDesc.get(), name_required().get())); + if (!resolvedDesc) { + return nullptr; + } + return create_from_desc(resolvedDesc.get()).release(); + } + + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle& style, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override { + SkUniqueCFRef desc = create_descriptor(familyName, style); + SkUniqueCFRef familyFont(CTFontCreateWithFontDescriptor(desc.get(), 0, nullptr)); + + // kCFStringEncodingUTF32 is BE unless there is a BOM. + // Since there is no machine endian option, explicitly state machine endian. +#ifdef SK_CPU_LENDIAN + constexpr CFStringEncoding encoding = kCFStringEncodingUTF32LE; +#else + constexpr CFStringEncoding encoding = kCFStringEncodingUTF32BE; +#endif + SkUniqueCFRef string(CFStringCreateWithBytes( + kCFAllocatorDefault, reinterpret_cast(&character), sizeof(character), + encoding, false)); + // If 0xD800 <= codepoint <= 0xDFFF || 0x10FFFF < codepoint 'string' may be nullptr. + // No font should be covering such codepoints (even the magic fallback font). + if (!string) { + return nullptr; + } + CFRange range = CFRangeMake(0, CFStringGetLength(string.get())); // in UniChar units. + SkUniqueCFRef fallbackFont( + CTFontCreateForString(familyFont.get(), string.get(), range)); + return SkTypeface_Mac::Make(std::move(fallbackFont), OpszVariation(), nullptr).release(); + } + + sk_sp onMakeFromData(sk_sp data, int ttcIndex) const override { + return this->makeFromStream( + std::unique_ptr(new SkMemoryStream(std::move(data))), ttcIndex); + } + + sk_sp onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const override { + return this->makeFromStream(std::move(stream), + SkFontArguments().setCollectionIndex(ttcIndex)); + } + + sk_sp onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const override { + return SkTypeface_Mac::MakeFromStream(std::move(stream), args); + } + + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override { + sk_sp data = SkData::MakeFromFileName(path); + if (!data) { + return nullptr; + } + + return this->onMakeFromData(std::move(data), ttcIndex); + } + + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle style) const override { + if (familyName) { + familyName = map_css_names(familyName); + } + + sk_sp face = create_from_name(familyName, style); + if (face) { + return face; + } + + static SkTypeface* gDefaultFace; + static SkOnce lookupDefault; + static const char FONT_DEFAULT_NAME[] = "Lucida Sans"; + lookupDefault([]{ + gDefaultFace = create_from_name(FONT_DEFAULT_NAME, SkFontStyle()).release(); + }); + return sk_ref_sp(gDefaultFace); + } +}; + +sk_sp SkFontMgr_New_CoreText(CTFontCollectionRef fontCollection) { + return sk_make_sp(fontCollection); +} + +#endif//defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) diff --git a/gfx/skia/skia/src/ports/SkFontMgr_mac_ct_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_mac_ct_factory.cpp new file mode 100644 index 0000000000..ef834e4af2 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_mac_ct_factory.cpp @@ -0,0 +1,18 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#include "include/core/SkFontMgr.h" +#include "include/ports/SkFontMgr_mac_ct.h" + +sk_sp SkFontMgr::Factory() { + return SkFontMgr_New_CoreText(nullptr); +} + +#endif//defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) diff --git a/gfx/skia/skia/src/ports/SkFontMgr_win_dw.cpp b/gfx/skia/skia/src/ports/SkFontMgr_win_dw.cpp new file mode 100644 index 0000000000..134364129e --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_win_dw.cpp @@ -0,0 +1,956 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/utils/win/SkDWriteNTDDI_VERSION.h" + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) + +#include "include/core/SkFontMgr.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypeface.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTPin.h" +#include "src/base/SkEndian.h" +#include "src/base/SkUTF.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkTypefaceCache.h" +#include "src/ports/SkTypeface_win_dw.h" +#include "src/utils/win/SkDWrite.h" +#include "src/utils/win/SkDWriteFontFileStream.h" +#include "src/utils/win/SkHRESULT.h" +#include "src/utils/win/SkObjBase.h" +#include "src/utils/win/SkTScopedComPtr.h" + +#include +#include +#include + +using namespace skia_private; + +namespace { + +// Korean fonts Gulim, Dotum, Batang, Gungsuh have bitmap strikes that get +// artifically emboldened by Windows without antialiasing. Korean users prefer +// these over the synthetic boldening performed by Skia. So let's make an +// exception for fonts with bitmap strikes and allow passing through Windows +// simulations for those, until Skia provides more control over simulations in +// font matching, see https://crbug.com/1258378 +bool HasBitmapStrikes(const SkTScopedComPtr& font) { + SkTScopedComPtr fontFace; + HRB(font->CreateFontFace(&fontFace)); + + AutoDWriteTable ebdtTable(fontFace.get(), + SkEndian_SwapBE32(SkSetFourByteTag('E', 'B', 'D', 'T'))); + return ebdtTable.fExists; +} + +// Iterate calls to GetFirstMatchingFont incrementally removing bold or italic +// styling that can trigger the simulations. Implementing it this way gets us a +// IDWriteFont that can be used as before and has the correct information on its +// own style. Stripping simulations from IDWriteFontFace is possible via +// IDWriteFontList1, IDWriteFontFaceReference and CreateFontFace, but this way +// we won't have a matching IDWriteFont which is still used in get_style(). +HRESULT FirstMatchingFontWithoutSimulations(const SkTScopedComPtr& family, + DWriteStyle dwStyle, + SkTScopedComPtr& font) { + bool noSimulations = false; + while (!noSimulations) { + SkTScopedComPtr searchFont; + HR(family->GetFirstMatchingFont( + dwStyle.fWeight, dwStyle.fWidth, dwStyle.fSlant, &searchFont)); + DWRITE_FONT_SIMULATIONS simulations = searchFont->GetSimulations(); + // If we still get simulations even though we're not asking for bold or + // italic, we can't help it and exit the loop. + +#ifdef SK_WIN_FONTMGR_NO_SIMULATIONS + noSimulations = simulations == DWRITE_FONT_SIMULATIONS_NONE || + (dwStyle.fWeight == DWRITE_FONT_WEIGHT_REGULAR && + dwStyle.fSlant == DWRITE_FONT_STYLE_NORMAL) || + HasBitmapStrikes(searchFont); +#else + noSimulations = true; +#endif + if (noSimulations) { + font = std::move(searchFont); + break; + } + if (simulations & DWRITE_FONT_SIMULATIONS_BOLD) { + dwStyle.fWeight = DWRITE_FONT_WEIGHT_REGULAR; + continue; + } + if (simulations & DWRITE_FONT_SIMULATIONS_OBLIQUE) { + dwStyle.fSlant = DWRITE_FONT_STYLE_NORMAL; + continue; + } + } + return S_OK; +} +} + +//////////////////////////////////////////////////////////////////////////////// + +class SkFontMgr_DirectWrite : public SkFontMgr { +public: + /** localeNameLength and defaultFamilyNameLength must include the null terminator. */ + SkFontMgr_DirectWrite(IDWriteFactory* factory, IDWriteFontCollection* fontCollection, + IDWriteFontFallback* fallback, + const WCHAR* localeName, int localeNameLength, + const WCHAR* defaultFamilyName, int defaultFamilyNameLength) + : fFactory(SkRefComPtr(factory)) + , fFontFallback(SkSafeRefComPtr(fallback)) + , fFontCollection(SkRefComPtr(fontCollection)) + , fLocaleName(localeNameLength) + , fDefaultFamilyName(defaultFamilyNameLength) + { + memcpy(fLocaleName.get(), localeName, localeNameLength * sizeof(WCHAR)); + memcpy(fDefaultFamilyName.get(), defaultFamilyName, defaultFamilyNameLength*sizeof(WCHAR)); + } + +protected: + int onCountFamilies() const override; + void onGetFamilyName(int index, SkString* familyName) const override; + SkFontStyleSet* onCreateStyleSet(int index) const override; + SkFontStyleSet* onMatchFamily(const char familyName[]) const override; + SkTypeface* onMatchFamilyStyle(const char familyName[], + const SkFontStyle& fontstyle) const override; + SkTypeface* onMatchFamilyStyleCharacter(const char familyName[], const SkFontStyle&, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override; + sk_sp onMakeFromStreamIndex(std::unique_ptr, int ttcIndex) const override; + sk_sp onMakeFromStreamArgs(std::unique_ptr, const SkFontArguments&) const override; + sk_sp onMakeFromData(sk_sp, int ttcIndex) const override; + sk_sp onMakeFromFile(const char path[], int ttcIndex) const override; + sk_sp onLegacyMakeTypeface(const char familyName[], SkFontStyle) const override; + +private: + HRESULT getByFamilyName(const WCHAR familyName[], IDWriteFontFamily** fontFamily) const; + sk_sp fallback(const WCHAR* dwFamilyName, DWriteStyle, + const WCHAR* dwBcp47, UINT32 character) const; + sk_sp layoutFallback(const WCHAR* dwFamilyName, DWriteStyle, + const WCHAR* dwBcp47, UINT32 character) const; + + /** Creates a typeface using a typeface cache. */ + sk_sp makeTypefaceFromDWriteFont(IDWriteFontFace* fontFace, + IDWriteFont* font, + IDWriteFontFamily* fontFamily) const; + + SkTScopedComPtr fFactory; + SkTScopedComPtr fFontFallback; + SkTScopedComPtr fFontCollection; + SkSMallocWCHAR fLocaleName; + SkSMallocWCHAR fDefaultFamilyName; + mutable SkMutex fTFCacheMutex; + mutable SkTypefaceCache fTFCache; + + friend class SkFontStyleSet_DirectWrite; + friend class FontFallbackRenderer; +}; + +class SkFontStyleSet_DirectWrite : public SkFontStyleSet { +public: + SkFontStyleSet_DirectWrite(const SkFontMgr_DirectWrite* fontMgr, + IDWriteFontFamily* fontFamily) + : fFontMgr(SkRef(fontMgr)) + , fFontFamily(SkRefComPtr(fontFamily)) + { } + + int count() override; + void getStyle(int index, SkFontStyle* fs, SkString* styleName) override; + SkTypeface* createTypeface(int index) override; + SkTypeface* matchStyle(const SkFontStyle& pattern) override; + +private: + sk_sp fFontMgr; + SkTScopedComPtr fFontFamily; +}; + +static HRESULT are_same(IUnknown* a, IUnknown* b, bool& same) { + SkTScopedComPtr iunkA; + HRM(a->QueryInterface(&iunkA), "Failed to QI for a."); + + SkTScopedComPtr iunkB; + HRM(b->QueryInterface(&iunkB), "Failed to QI for b."); + + same = (iunkA.get() == iunkB.get()); + return S_OK; +} + +struct ProtoDWriteTypeface { + IDWriteFontFace* fDWriteFontFace; + IDWriteFont* fDWriteFont; + IDWriteFontFamily* fDWriteFontFamily; +}; + +static bool FindByDWriteFont(SkTypeface* cached, void* ctx) { + DWriteFontTypeface* cshFace = reinterpret_cast(cached); + ProtoDWriteTypeface* ctxFace = reinterpret_cast(ctx); + + // IDWriteFontFace5 introduced both Equals and HasVariations + SkTScopedComPtr cshFontFace5; + SkTScopedComPtr ctxFontFace5; + cshFace->fDWriteFontFace->QueryInterface(&cshFontFace5); + ctxFace->fDWriteFontFace->QueryInterface(&ctxFontFace5); + if (cshFontFace5 && ctxFontFace5) { + return cshFontFace5->Equals(ctxFontFace5.get()); + } + + bool same; + + //Check to see if the two fonts are identical. + HRB(are_same(cshFace->fDWriteFont.get(), ctxFace->fDWriteFont, same)); + if (same) { + return true; + } + + HRB(are_same(cshFace->fDWriteFontFace.get(), ctxFace->fDWriteFontFace, same)); + if (same) { + return true; + } + + //Check if the two fonts share the same loader and have the same key. + UINT32 cshNumFiles; + UINT32 ctxNumFiles; + HRB(cshFace->fDWriteFontFace->GetFiles(&cshNumFiles, nullptr)); + HRB(ctxFace->fDWriteFontFace->GetFiles(&ctxNumFiles, nullptr)); + if (cshNumFiles != ctxNumFiles) { + return false; + } + + SkTScopedComPtr cshFontFile; + SkTScopedComPtr ctxFontFile; + HRB(cshFace->fDWriteFontFace->GetFiles(&cshNumFiles, &cshFontFile)); + HRB(ctxFace->fDWriteFontFace->GetFiles(&ctxNumFiles, &ctxFontFile)); + + //for (each file) { //we currently only admit fonts from one file. + SkTScopedComPtr cshFontFileLoader; + SkTScopedComPtr ctxFontFileLoader; + HRB(cshFontFile->GetLoader(&cshFontFileLoader)); + HRB(ctxFontFile->GetLoader(&ctxFontFileLoader)); + HRB(are_same(cshFontFileLoader.get(), ctxFontFileLoader.get(), same)); + if (!same) { + return false; + } + //} + + const void* cshRefKey; + UINT32 cshRefKeySize; + const void* ctxRefKey; + UINT32 ctxRefKeySize; + HRB(cshFontFile->GetReferenceKey(&cshRefKey, &cshRefKeySize)); + HRB(ctxFontFile->GetReferenceKey(&ctxRefKey, &ctxRefKeySize)); + if (cshRefKeySize != ctxRefKeySize) { + return false; + } + if (0 != memcmp(cshRefKey, ctxRefKey, ctxRefKeySize)) { + return false; + } + + //TODO: better means than comparing name strings? + //NOTE: .ttc and fake bold/italic will end up here. + SkTScopedComPtr cshFamilyNames; + SkTScopedComPtr cshFaceNames; + HRB(cshFace->fDWriteFontFamily->GetFamilyNames(&cshFamilyNames)); + HRB(cshFace->fDWriteFont->GetFaceNames(&cshFaceNames)); + UINT32 cshFamilyNameLength; + UINT32 cshFaceNameLength; + HRB(cshFamilyNames->GetStringLength(0, &cshFamilyNameLength)); + HRB(cshFaceNames->GetStringLength(0, &cshFaceNameLength)); + + SkTScopedComPtr ctxFamilyNames; + SkTScopedComPtr ctxFaceNames; + HRB(ctxFace->fDWriteFontFamily->GetFamilyNames(&ctxFamilyNames)); + HRB(ctxFace->fDWriteFont->GetFaceNames(&ctxFaceNames)); + UINT32 ctxFamilyNameLength; + UINT32 ctxFaceNameLength; + HRB(ctxFamilyNames->GetStringLength(0, &ctxFamilyNameLength)); + HRB(ctxFaceNames->GetStringLength(0, &ctxFaceNameLength)); + + if (cshFamilyNameLength != ctxFamilyNameLength || + cshFaceNameLength != ctxFaceNameLength) + { + return false; + } + + SkSMallocWCHAR cshFamilyName(cshFamilyNameLength+1); + SkSMallocWCHAR cshFaceName(cshFaceNameLength+1); + HRB(cshFamilyNames->GetString(0, cshFamilyName.get(), cshFamilyNameLength+1)); + HRB(cshFaceNames->GetString(0, cshFaceName.get(), cshFaceNameLength+1)); + + SkSMallocWCHAR ctxFamilyName(ctxFamilyNameLength+1); + SkSMallocWCHAR ctxFaceName(ctxFaceNameLength+1); + HRB(ctxFamilyNames->GetString(0, ctxFamilyName.get(), ctxFamilyNameLength+1)); + HRB(ctxFaceNames->GetString(0, ctxFaceName.get(), ctxFaceNameLength+1)); + + return wcscmp(cshFamilyName.get(), ctxFamilyName.get()) == 0 && + wcscmp(cshFaceName.get(), ctxFaceName.get()) == 0; +} + +sk_sp SkFontMgr_DirectWrite::makeTypefaceFromDWriteFont( + IDWriteFontFace* fontFace, + IDWriteFont* font, + IDWriteFontFamily* fontFamily) const { + SkAutoMutexExclusive ama(fTFCacheMutex); + ProtoDWriteTypeface spec = { fontFace, font, fontFamily }; + sk_sp face = fTFCache.findByProcAndRef(FindByDWriteFont, &spec); + if (nullptr == face) { + face = DWriteFontTypeface::Make(fFactory.get(), fontFace, font, fontFamily, nullptr, + SkFontArguments::Palette{0, nullptr, 0}); + if (face) { + fTFCache.add(face); + } + } + return face; +} + +int SkFontMgr_DirectWrite::onCountFamilies() const { + return fFontCollection->GetFontFamilyCount(); +} + +void SkFontMgr_DirectWrite::onGetFamilyName(int index, SkString* familyName) const { + SkTScopedComPtr fontFamily; + HRVM(fFontCollection->GetFontFamily(index, &fontFamily), "Could not get requested family."); + + SkTScopedComPtr familyNames; + HRVM(fontFamily->GetFamilyNames(&familyNames), "Could not get family names."); + + sk_get_locale_string(familyNames.get(), fLocaleName.get(), familyName); +} + +SkFontStyleSet* SkFontMgr_DirectWrite::onCreateStyleSet(int index) const { + SkTScopedComPtr fontFamily; + HRNM(fFontCollection->GetFontFamily(index, &fontFamily), "Could not get requested family."); + + return new SkFontStyleSet_DirectWrite(this, fontFamily.get()); +} + +SkFontStyleSet* SkFontMgr_DirectWrite::onMatchFamily(const char familyName[]) const { + if (!familyName) { + return nullptr; + } + + SkSMallocWCHAR dwFamilyName; + HRN(sk_cstring_to_wchar(familyName, &dwFamilyName)); + + UINT32 index; + BOOL exists; + HRNM(fFontCollection->FindFamilyName(dwFamilyName.get(), &index, &exists), + "Failed while finding family by name."); + if (!exists) { + return nullptr; + } + + return this->onCreateStyleSet(index); +} + +SkTypeface* SkFontMgr_DirectWrite::onMatchFamilyStyle(const char familyName[], + const SkFontStyle& fontstyle) const { + sk_sp sset(this->matchFamily(familyName)); + return sset->matchStyle(fontstyle); +} + +class FontFallbackRenderer : public IDWriteTextRenderer { +public: + FontFallbackRenderer(const SkFontMgr_DirectWrite* outer, UINT32 character) + : fRefCount(1), fOuter(SkSafeRef(outer)), fCharacter(character), fResolvedTypeface(nullptr) { + } + + // IUnknown methods + SK_STDMETHODIMP QueryInterface(IID const& riid, void** ppvObject) override { + if (__uuidof(IUnknown) == riid || + __uuidof(IDWritePixelSnapping) == riid || + __uuidof(IDWriteTextRenderer) == riid) + { + *ppvObject = this; + this->AddRef(); + return S_OK; + } + *ppvObject = nullptr; + return E_FAIL; + } + + SK_STDMETHODIMP_(ULONG) AddRef() override { + return InterlockedIncrement(&fRefCount); + } + + SK_STDMETHODIMP_(ULONG) Release() override { + ULONG newCount = InterlockedDecrement(&fRefCount); + if (0 == newCount) { + delete this; + } + return newCount; + } + + // IDWriteTextRenderer methods + SK_STDMETHODIMP DrawGlyphRun( + void* clientDrawingContext, + FLOAT baselineOriginX, + FLOAT baselineOriginY, + DWRITE_MEASURING_MODE measuringMode, + DWRITE_GLYPH_RUN const* glyphRun, + DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription, + IUnknown* clientDrawingEffect) override + { + if (!glyphRun->fontFace) { + HRM(E_INVALIDARG, "Glyph run without font face."); + } + + SkTScopedComPtr font; + HRM(fOuter->fFontCollection->GetFontFromFontFace(glyphRun->fontFace, &font), + "Could not get font from font face."); + + // It is possible that the font passed does not actually have the requested character, + // due to no font being found and getting the fallback font. + // Check that the font actually contains the requested character. + BOOL exists; + HRM(font->HasCharacter(fCharacter, &exists), "Could not find character."); + + if (exists) { + SkTScopedComPtr fontFamily; + HRM(font->GetFontFamily(&fontFamily), "Could not get family."); + fResolvedTypeface = fOuter->makeTypefaceFromDWriteFont(glyphRun->fontFace, + font.get(), + fontFamily.get()); + fHasSimulations = (font->GetSimulations() != DWRITE_FONT_SIMULATIONS_NONE) && + !HasBitmapStrikes(font); + } + + return S_OK; + } + + SK_STDMETHODIMP DrawUnderline( + void* clientDrawingContext, + FLOAT baselineOriginX, + FLOAT baselineOriginY, + DWRITE_UNDERLINE const* underline, + IUnknown* clientDrawingEffect) override + { return E_NOTIMPL; } + + SK_STDMETHODIMP DrawStrikethrough( + void* clientDrawingContext, + FLOAT baselineOriginX, + FLOAT baselineOriginY, + DWRITE_STRIKETHROUGH const* strikethrough, + IUnknown* clientDrawingEffect) override + { return E_NOTIMPL; } + + SK_STDMETHODIMP DrawInlineObject( + void* clientDrawingContext, + FLOAT originX, + FLOAT originY, + IDWriteInlineObject* inlineObject, + BOOL isSideways, + BOOL isRightToLeft, + IUnknown* clientDrawingEffect) override + { return E_NOTIMPL; } + + // IDWritePixelSnapping methods + SK_STDMETHODIMP IsPixelSnappingDisabled( + void* clientDrawingContext, + BOOL* isDisabled) override + { + *isDisabled = FALSE; + return S_OK; + } + + SK_STDMETHODIMP GetCurrentTransform( + void* clientDrawingContext, + DWRITE_MATRIX* transform) override + { + const DWRITE_MATRIX ident = { 1.0, 0.0, 0.0, 1.0, 0.0, 0.0 }; + *transform = ident; + return S_OK; + } + + SK_STDMETHODIMP GetPixelsPerDip( + void* clientDrawingContext, + FLOAT* pixelsPerDip) override + { + *pixelsPerDip = 1.0f; + return S_OK; + } + + sk_sp ConsumeFallbackTypeface() { return std::move(fResolvedTypeface); } + + bool FallbackTypefaceHasSimulations() { return fHasSimulations; } + +private: + virtual ~FontFallbackRenderer() { } + + ULONG fRefCount; + sk_sp fOuter; + UINT32 fCharacter; + sk_sp fResolvedTypeface; + bool fHasSimulations{false}; +}; + +class FontFallbackSource : public IDWriteTextAnalysisSource { +public: + FontFallbackSource(const WCHAR* string, UINT32 length, const WCHAR* locale, + IDWriteNumberSubstitution* numberSubstitution) + : fRefCount(1) + , fString(string) + , fLength(length) + , fLocale(locale) + , fNumberSubstitution(numberSubstitution) + { } + + // IUnknown methods + SK_STDMETHODIMP QueryInterface(IID const& riid, void** ppvObject) override { + if (__uuidof(IUnknown) == riid || + __uuidof(IDWriteTextAnalysisSource) == riid) + { + *ppvObject = this; + this->AddRef(); + return S_OK; + } + *ppvObject = nullptr; + return E_FAIL; + } + + SK_STDMETHODIMP_(ULONG) AddRef() override { + return InterlockedIncrement(&fRefCount); + } + + SK_STDMETHODIMP_(ULONG) Release() override { + ULONG newCount = InterlockedDecrement(&fRefCount); + if (0 == newCount) { + delete this; + } + return newCount; + } + + // IDWriteTextAnalysisSource methods + SK_STDMETHODIMP GetTextAtPosition( + UINT32 textPosition, + WCHAR const** textString, + UINT32* textLength) override + { + if (fLength <= textPosition) { + *textString = nullptr; + *textLength = 0; + return S_OK; + } + *textString = fString + textPosition; + *textLength = fLength - textPosition; + return S_OK; + } + + SK_STDMETHODIMP GetTextBeforePosition( + UINT32 textPosition, + WCHAR const** textString, + UINT32* textLength) override + { + if (textPosition < 1 || fLength <= textPosition) { + *textString = nullptr; + *textLength = 0; + return S_OK; + } + *textString = fString; + *textLength = textPosition; + return S_OK; + } + + SK_STDMETHODIMP_(DWRITE_READING_DIRECTION) GetParagraphReadingDirection() override { + // TODO: this is also interesting. + return DWRITE_READING_DIRECTION_LEFT_TO_RIGHT; + } + + SK_STDMETHODIMP GetLocaleName( + UINT32 textPosition, + UINT32* textLength, + WCHAR const** localeName) override + { + *localeName = fLocale; + return S_OK; + } + + SK_STDMETHODIMP GetNumberSubstitution( + UINT32 textPosition, + UINT32* textLength, + IDWriteNumberSubstitution** numberSubstitution) override + { + *numberSubstitution = fNumberSubstitution; + return S_OK; + } + +private: + virtual ~FontFallbackSource() { } + + ULONG fRefCount; + const WCHAR* fString; + UINT32 fLength; + const WCHAR* fLocale; + IDWriteNumberSubstitution* fNumberSubstitution; +}; + +SkTypeface* SkFontMgr_DirectWrite::onMatchFamilyStyleCharacter(const char familyName[], + const SkFontStyle& style, + const char* bcp47[], int bcp47Count, + SkUnichar character) const { + DWriteStyle dwStyle(style); + + const WCHAR* dwFamilyName = nullptr; + SkSMallocWCHAR dwFamilyNameLocal; + if (familyName) { + HRN(sk_cstring_to_wchar(familyName, &dwFamilyNameLocal)); + dwFamilyName = dwFamilyNameLocal; + } + + const SkSMallocWCHAR* dwBcp47; + SkSMallocWCHAR dwBcp47Local; + if (bcp47Count < 1) { + dwBcp47 = &fLocaleName; + } else { + // TODO: support fallback stack. + // TODO: DirectWrite supports 'zh-CN' or 'zh-Hans', but 'zh' misses completely + // and may produce a Japanese font. + HRN(sk_cstring_to_wchar(bcp47[bcp47Count - 1], &dwBcp47Local)); + dwBcp47 = &dwBcp47Local; + } + + if (fFontFallback) { + return this->fallback(dwFamilyName, dwStyle, dwBcp47->get(), character).release(); + } + + // LayoutFallback may use the system font collection for fallback. + return this->layoutFallback(dwFamilyName, dwStyle, dwBcp47->get(), character).release(); +} + +sk_sp SkFontMgr_DirectWrite::fallback(const WCHAR* dwFamilyName, + DWriteStyle dwStyle, + const WCHAR* dwBcp47, + UINT32 character) const { + WCHAR str[16]; + UINT32 strLen = SkTo(SkUTF::ToUTF16(character, reinterpret_cast(str))); + + if (!fFontFallback) { + return nullptr; + } + + SkTScopedComPtr numberSubstitution; + HRNM(fFactory->CreateNumberSubstitution(DWRITE_NUMBER_SUBSTITUTION_METHOD_NONE, dwBcp47, + TRUE, &numberSubstitution), + "Could not create number substitution."); + SkTScopedComPtr fontFallbackSource( + new FontFallbackSource(str, strLen, dwBcp47, numberSubstitution.get())); + + UINT32 mappedLength; + SkTScopedComPtr font; + FLOAT scale; + + bool noSimulations = false; + while (!noSimulations) { + font.reset(); + HRNM(fFontFallback->MapCharacters(fontFallbackSource.get(), + 0, // textPosition, + strLen, + fFontCollection.get(), + dwFamilyName, + dwStyle.fWeight, + dwStyle.fSlant, + dwStyle.fWidth, + &mappedLength, + &font, + &scale), + "Could not map characters"); + if (!font.get()) { + return nullptr; + } + + DWRITE_FONT_SIMULATIONS simulations = font->GetSimulations(); + +#ifdef SK_WIN_FONTMGR_NO_SIMULATIONS + noSimulations = simulations == DWRITE_FONT_SIMULATIONS_NONE || HasBitmapStrikes(font); +#else + noSimulations = true; +#endif + + if (simulations & DWRITE_FONT_SIMULATIONS_BOLD) { + dwStyle.fWeight = DWRITE_FONT_WEIGHT_REGULAR; + continue; + } + + if (simulations & DWRITE_FONT_SIMULATIONS_OBLIQUE) { + dwStyle.fSlant = DWRITE_FONT_STYLE_NORMAL; + continue; + } + } + + SkTScopedComPtr fontFace; + HRNM(font->CreateFontFace(&fontFace), "Could not get font face from font."); + + SkTScopedComPtr fontFamily; + HRNM(font->GetFontFamily(&fontFamily), "Could not get family from font."); + return this->makeTypefaceFromDWriteFont(fontFace.get(), font.get(), fontFamily.get()); +} + +sk_sp SkFontMgr_DirectWrite::layoutFallback(const WCHAR* dwFamilyName, + DWriteStyle dwStyle, + const WCHAR* dwBcp47, + UINT32 character) const +{ + WCHAR str[16]; + UINT32 strLen = SkTo(SkUTF::ToUTF16(character, reinterpret_cast(str))); + + bool noSimulations = false; + sk_sp returnTypeface(nullptr); + while (!noSimulations) { + SkTScopedComPtr fallbackFormat; + HRNM(fFactory->CreateTextFormat(dwFamilyName ? dwFamilyName : L"", + fFontCollection.get(), + dwStyle.fWeight, + dwStyle.fSlant, + dwStyle.fWidth, + 72.0f, + dwBcp47, + &fallbackFormat), + "Could not create text format."); + + // No matter how the font collection is set on this IDWriteTextLayout, it is not possible to + // disable use of the system font collection in fallback. + SkTScopedComPtr fallbackLayout; + HRNM(fFactory->CreateTextLayout( + str, strLen, fallbackFormat.get(), 200.0f, 200.0f, &fallbackLayout), + "Could not create text layout."); + + SkTScopedComPtr fontFallbackRenderer( + new FontFallbackRenderer(this, character)); + + HRNM(fallbackLayout->SetFontCollection(fFontCollection.get(), {0, strLen}), + "Could not set layout font collection."); + HRNM(fallbackLayout->Draw(nullptr, fontFallbackRenderer.get(), 50.0f, 50.0f), + "Could not draw layout with renderer."); + +#ifdef SK_WIN_FONTMGR_NO_SIMULATIONS + noSimulations = !fontFallbackRenderer->FallbackTypefaceHasSimulations(); +#else + noSimulations = true; +#endif + + if (noSimulations) { + returnTypeface = fontFallbackRenderer->ConsumeFallbackTypeface(); + } + + if (dwStyle.fWeight != DWRITE_FONT_WEIGHT_REGULAR) { + dwStyle.fWeight = DWRITE_FONT_WEIGHT_REGULAR; + continue; + } + + if (dwStyle.fSlant != DWRITE_FONT_STYLE_NORMAL) { + dwStyle.fSlant = DWRITE_FONT_STYLE_NORMAL; + continue; + } + } + + return returnTypeface; +} + +sk_sp SkFontMgr_DirectWrite::onMakeFromStreamIndex(std::unique_ptr stream, + int ttcIndex) const { + SkFontArguments args; + args.setCollectionIndex(ttcIndex); + return this->onMakeFromStreamArgs(std::move(stream), args); +} + +sk_sp SkFontMgr_DirectWrite::onMakeFromStreamArgs(std::unique_ptr stream, + const SkFontArguments& args) const { + return DWriteFontTypeface::MakeFromStream(std::move(stream), args); +} + +sk_sp SkFontMgr_DirectWrite::onMakeFromData(sk_sp data, int ttcIndex) const { + return this->makeFromStream(std::make_unique(std::move(data)), ttcIndex); +} + +sk_sp SkFontMgr_DirectWrite::onMakeFromFile(const char path[], int ttcIndex) const { + return this->makeFromStream(SkStream::MakeFromFile(path), ttcIndex); +} + +HRESULT SkFontMgr_DirectWrite::getByFamilyName(const WCHAR wideFamilyName[], + IDWriteFontFamily** fontFamily) const { + UINT32 index; + BOOL exists; + HR(fFontCollection->FindFamilyName(wideFamilyName, &index, &exists)); + + if (exists) { + HR(fFontCollection->GetFontFamily(index, fontFamily)); + } + return S_OK; +} + +sk_sp SkFontMgr_DirectWrite::onLegacyMakeTypeface(const char familyName[], + SkFontStyle style) const { + SkTScopedComPtr fontFamily; + DWriteStyle dwStyle(style); + if (familyName) { + SkSMallocWCHAR dwFamilyName; + if (SUCCEEDED(sk_cstring_to_wchar(familyName, &dwFamilyName))) { + this->getByFamilyName(dwFamilyName, &fontFamily); + if (!fontFamily && fFontFallback) { + return this->fallback( + dwFamilyName, dwStyle, fLocaleName.get(), 32); + } + } + } + + if (!fontFamily) { + if (fFontFallback) { + return this->fallback(nullptr, dwStyle, fLocaleName.get(), 32); + } + // SPI_GETNONCLIENTMETRICS lfMessageFont can fail in Win8. (DisallowWin32kSystemCalls) + // layoutFallback causes DCHECK in Chromium. (Uses system font collection.) + HRNM(this->getByFamilyName(fDefaultFamilyName, &fontFamily), + "Could not create DWrite font family from LOGFONT."); + } + + if (!fontFamily) { + // Could not obtain the default font. + HRNM(fFontCollection->GetFontFamily(0, &fontFamily), + "Could not get default-default font family."); + } + + SkTScopedComPtr font; + HRNM(FirstMatchingFontWithoutSimulations(fontFamily, dwStyle, font), + "No font found from family."); + + SkTScopedComPtr fontFace; + HRNM(font->CreateFontFace(&fontFace), "Could not create font face."); + + return this->makeTypefaceFromDWriteFont(fontFace.get(), font.get(), fontFamily.get()); +} + +/////////////////////////////////////////////////////////////////////////////// + +int SkFontStyleSet_DirectWrite::count() { + return fFontFamily->GetFontCount(); +} + +SkTypeface* SkFontStyleSet_DirectWrite::createTypeface(int index) { + SkTScopedComPtr font; + HRNM(fFontFamily->GetFont(index, &font), "Could not get font."); + + SkTScopedComPtr fontFace; + HRNM(font->CreateFontFace(&fontFace), "Could not create font face."); + + return fFontMgr->makeTypefaceFromDWriteFont(fontFace.get(), font.get(), fFontFamily.get()).release(); +} + +void SkFontStyleSet_DirectWrite::getStyle(int index, SkFontStyle* fs, SkString* styleName) { + SkTScopedComPtr font; + HRVM(fFontFamily->GetFont(index, &font), "Could not get font."); + + if (fs) { + *fs = get_style(font.get()); + } + + if (styleName) { + SkTScopedComPtr faceNames; + if (SUCCEEDED(font->GetFaceNames(&faceNames))) { + sk_get_locale_string(faceNames.get(), fFontMgr->fLocaleName.get(), styleName); + } + } +} + +SkTypeface* SkFontStyleSet_DirectWrite::matchStyle(const SkFontStyle& pattern) { + SkTScopedComPtr font; + DWriteStyle dwStyle(pattern); + + HRNM(FirstMatchingFontWithoutSimulations(fFontFamily, dwStyle, font), + "No font found from family."); + + SkTScopedComPtr fontFace; + HRNM(font->CreateFontFace(&fontFace), "Could not create font face."); + + return fFontMgr->makeTypefaceFromDWriteFont(fontFace.get(), font.get(), + fFontFamily.get()).release(); +} + +//////////////////////////////////////////////////////////////////////////////// +#include "include/ports/SkTypeface_win.h" + +SK_API sk_sp SkFontMgr_New_DirectWrite(IDWriteFactory* factory, + IDWriteFontCollection* collection) { + return SkFontMgr_New_DirectWrite(factory, collection, nullptr); +} + +SK_API sk_sp SkFontMgr_New_DirectWrite(IDWriteFactory* factory, + IDWriteFontCollection* collection, + IDWriteFontFallback* fallback) { + if (nullptr == factory) { + factory = sk_get_dwrite_factory(); + if (nullptr == factory) { + return nullptr; + } + } + + SkTScopedComPtr systemFontCollection; + if (nullptr == collection) { + HRNM(factory->GetSystemFontCollection(&systemFontCollection, FALSE), + "Could not get system font collection."); + collection = systemFontCollection.get(); + } + + // It is possible to have been provided a font fallback when factory2 is not available. + SkTScopedComPtr systemFontFallback; + if (nullptr == fallback) { + SkTScopedComPtr factory2; + if (!SUCCEEDED(factory->QueryInterface(&factory2))) { + // IUnknown::QueryInterface states that if it fails, punk will be set to nullptr. + // http://blogs.msdn.com/b/oldnewthing/archive/2004/03/26/96777.aspx + SkASSERT_RELEASE(nullptr == factory2.get()); + } else { + HRNM(factory2->GetSystemFontFallback(&systemFontFallback), + "Could not get system fallback."); + fallback = systemFontFallback.get(); + } + } + + const WCHAR* defaultFamilyName = L""; + int defaultFamilyNameLen = 1; + NONCLIENTMETRICSW metrics; + metrics.cbSize = sizeof(metrics); + + #ifndef SK_WINUWP + if (nullptr == fallback) { + if (SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, sizeof(metrics), &metrics, 0)) { + defaultFamilyName = metrics.lfMessageFont.lfFaceName; + defaultFamilyNameLen = LF_FACESIZE; + } + } + #endif //SK_WINUWP + + WCHAR localeNameStorage[LOCALE_NAME_MAX_LENGTH]; + const WCHAR* localeName = L""; + int localeNameLen = 1; + + // Dynamically load GetUserDefaultLocaleName function, as it is not available on XP. + SkGetUserDefaultLocaleNameProc getUserDefaultLocaleNameProc = nullptr; + HRESULT hr = SkGetGetUserDefaultLocaleNameProc(&getUserDefaultLocaleNameProc); + if (nullptr == getUserDefaultLocaleNameProc) { + SK_TRACEHR(hr, "Could not get GetUserDefaultLocaleName."); + } else { + int size = getUserDefaultLocaleNameProc(localeNameStorage, LOCALE_NAME_MAX_LENGTH); + if (size) { + localeName = localeNameStorage; + localeNameLen = size; + } + } + + return sk_make_sp(factory, collection, fallback, + localeName, localeNameLen, + defaultFamilyName, defaultFamilyNameLen); +} + +#include "include/ports/SkFontMgr_indirect.h" +SK_API sk_sp SkFontMgr_New_DirectWriteRenderer(sk_sp proxy) { + sk_sp impl(SkFontMgr_New_DirectWrite()); + if (!impl) { + return nullptr; + } + return sk_make_sp(std::move(impl), std::move(proxy)); +} +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkFontMgr_win_dw_factory.cpp b/gfx/skia/skia/src/ports/SkFontMgr_win_dw_factory.cpp new file mode 100644 index 0000000000..08195c569f --- /dev/null +++ b/gfx/skia/skia/src/ports/SkFontMgr_win_dw_factory.cpp @@ -0,0 +1,18 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) // And !SKIA_GDI? + +#include "include/core/SkFontMgr.h" +#include "include/ports/SkTypeface_win.h" + +sk_sp SkFontMgr::Factory() { + return SkFontMgr_New_DirectWrite(); +} + +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkGlobalInitialization_default.cpp b/gfx/skia/skia/src/ports/SkGlobalInitialization_default.cpp new file mode 100644 index 0000000000..a9f6c8ed17 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkGlobalInitialization_default.cpp @@ -0,0 +1,62 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFlattenable.h" + +#if defined(SK_DISABLE_EFFECT_DESERIALIZATION) + + void SkFlattenable::PrivateInitializer::InitEffects() {} + void SkFlattenable::PrivateInitializer::InitImageFilters() {} + +#else + + #include "include/core/SkMaskFilter.h" + #include "src/core/SkColorFilterBase.h" + #include "src/core/SkImageFilter_Base.h" + #include "src/effects/SkDashImpl.h" + #include "src/shaders/gradients/SkGradientShaderBase.h" + + /** + * Register most effects for deserialization. + * + * None of these are strictly required for Skia to operate, so if you're + * not using deserialization yourself, you can define + * SK_DISABLE_EFFECT_SERIALIZATION, or modify/replace this file as needed. + */ + void SkFlattenable::PrivateInitializer::InitEffects() { + // Shaders. + SkRegisterLinearGradientShaderFlattenable(); + SkRegisterRadialGradientShaderFlattenable(); + SkRegisterSweepGradientShaderFlattenable(); + SkRegisterTwoPointConicalGradientShaderFlattenable(); + + // Color filters. + SkRegisterComposeColorFilterFlattenable(); + SkRegisterModeColorFilterFlattenable(); + SkRegisterColorSpaceXformColorFilterFlattenable(); + SkRegisterWorkingFormatColorFilterFlattenable(); + + // Mask filters. + SkMaskFilter::RegisterFlattenables(); + + // Path effects. + SK_REGISTER_FLATTENABLE(SkDashImpl); + } + + /* + * Register SkImageFilters for deserialization. + * + * None of these are strictly required for Skia to operate, so if you're + * not using deserialization yourself, you can define + * SK_DISABLE_EFFECT_SERIALIZATION, or modify/replace this file as needed. + */ + void SkFlattenable::PrivateInitializer::InitImageFilters() { + SkRegisterBlurImageFilterFlattenable(); + SkRegisterComposeImageFilterFlattenable(); + } + +#endif diff --git a/gfx/skia/skia/src/ports/SkImageEncoder_CG.cpp b/gfx/skia/skia/src/ports/SkImageEncoder_CG.cpp new file mode 100644 index 0000000000..a247d4955e --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageEncoder_CG.cpp @@ -0,0 +1,118 @@ +/* + * Copyright 2008 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/encode/SkImageEncoderPriv.h" + +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#include "include/core/SkBitmap.h" +#include "include/core/SkData.h" +#include "include/core/SkStream.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkTemplates.h" +#include "include/utils/mac/SkCGUtils.h" +#include "src/core/SkStreamPriv.h" +#include "src/utils/mac/SkUniqueCFRef.h" + +#ifdef SK_BUILD_FOR_MAC +#include +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#include +#include +#endif + +static size_t consumer_put(void* info, const void* buffer, size_t count) { + SkWStream* stream = reinterpret_cast(info); + return stream->write(buffer, count) ? count : 0; +} + +static void consumer_release(void* info) { + // we do nothing, since by design we don't "own" the stream (i.e. info) +} + +static SkUniqueCFRef SkStreamToCGDataConsumer(SkWStream* stream) { + CGDataConsumerCallbacks procs; + procs.putBytes = consumer_put; + procs.releaseConsumer = consumer_release; + // we don't own/reference the stream, so it our consumer must not live + // longer that our caller's ownership of the stream + return SkUniqueCFRef(CGDataConsumerCreate(stream, &procs)); +} + +static SkUniqueCFRef SkStreamToImageDestination(SkWStream* stream, + CFStringRef type) { + SkUniqueCFRef consumer = SkStreamToCGDataConsumer(stream); + if (nullptr == consumer) { + return nullptr; + } + + return SkUniqueCFRef( + CGImageDestinationCreateWithDataConsumer(consumer.get(), type, 1, nullptr)); +} + +/* Encode bitmaps via CGImageDestination. We setup a DataConsumer which writes + to our SkWStream. Since we don't reference/own the SkWStream, our consumer + must only live for the duration of the onEncode() method. + */ +bool SkEncodeImageWithCG(SkWStream* stream, const SkPixmap& pixmap, SkEncodedImageFormat format) { + SkBitmap bm; + if (!bm.installPixels(pixmap)) { + return false; + } + bm.setImmutable(); + + CFStringRef type; + switch (format) { + case SkEncodedImageFormat::kICO: + type = kUTTypeICO; + break; + case SkEncodedImageFormat::kBMP: + type = kUTTypeBMP; + break; + case SkEncodedImageFormat::kGIF: + type = kUTTypeGIF; + break; + case SkEncodedImageFormat::kJPEG: + type = kUTTypeJPEG; + break; + case SkEncodedImageFormat::kPNG: + // PNG encoding an ARGB_4444 bitmap gives the following errors in GM: + // : CGImageDestinationAddImage image could not be converted to destination + // format. + // : CGImageDestinationFinalize image destination does not have enough images + // So instead we copy to 8888. + if (bm.colorType() == kARGB_4444_SkColorType) { + SkBitmap bitmapN32; + bitmapN32.allocPixels(bm.info().makeColorType(kN32_SkColorType)); + bm.readPixels(bitmapN32.info(), bitmapN32.getPixels(), bitmapN32.rowBytes(), 0, 0); + bm.swap(bitmapN32); + } + type = kUTTypePNG; + break; + default: + return false; + } + + SkUniqueCFRef dst = SkStreamToImageDestination(stream, type); + if (nullptr == dst) { + return false; + } + + SkUniqueCFRef image(SkCreateCGImageRef(bm)); + if (nullptr == image) { + return false; + } + + CGImageDestinationAddImage(dst.get(), image.get(), nullptr); + return CGImageDestinationFinalize(dst.get()); +} + +#endif//defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) diff --git a/gfx/skia/skia/src/ports/SkImageEncoder_NDK.cpp b/gfx/skia/skia/src/ports/SkImageEncoder_NDK.cpp new file mode 100644 index 0000000000..5fc55d7124 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageEncoder_NDK.cpp @@ -0,0 +1,72 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkPixmap.h" +#include "include/core/SkStream.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTo.h" +#include "src/encode/SkImageEncoderPriv.h" +#include "src/ports/SkNDKConversions.h" + +bool SkEncodeImageWithNDK(SkWStream* stream, const SkPixmap& pmap, SkEncodedImageFormat format, + int quality) { + // If any of these values is invalid (e.g. set to zero), the info will be rejected by + // AndroidBitmap_compress. + AndroidBitmapInfo info { + .width = SkTFitsIn(pmap.width()) ? SkToU32(pmap.width()) : 0, + .height = SkTFitsIn(pmap.height()) ? SkToU32(pmap.height()) : 0, + .stride = SkTFitsIn(pmap.rowBytes()) ? SkToU32(pmap.rowBytes()) : 0, + .format = SkNDKConversions::toAndroidBitmapFormat(pmap.colorType()) + }; + + switch (pmap.alphaType()) { + case kPremul_SkAlphaType: + info.flags = ANDROID_BITMAP_FLAGS_ALPHA_PREMUL; + break; + case kOpaque_SkAlphaType: + info.flags = ANDROID_BITMAP_FLAGS_ALPHA_OPAQUE; + break; + case kUnpremul_SkAlphaType: + info.flags = ANDROID_BITMAP_FLAGS_ALPHA_UNPREMUL; + break; + default: + return false; + } + + AndroidBitmapCompressFormat androidFormat; + switch (format) { + case SkEncodedImageFormat::kJPEG: + androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_JPEG; + break; + case SkEncodedImageFormat::kPNG: + androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_PNG; + break; + case SkEncodedImageFormat::kWEBP: + if (quality == 100) { + // Mimic the behavior of SkImageEncoder.cpp. In LOSSLESS mode, libwebp + // interprets quality as the amount of effort (time) to spend making + // the encoded image smaller, while the visual quality remains constant. + // This value of 75 (on a scale of 0 - 100, where 100 spends the most + // time for the smallest encoding) matches WebPConfigInit. + androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSLESS; + quality = 75; + } else { + androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSY; + } + break; + default: + return false; + } + + auto write_to_stream = [](void* userContext, const void* data, size_t size) { + return reinterpret_cast(userContext)->write(data, size); + }; + + return ANDROID_BITMAP_RESULT_SUCCESS == AndroidBitmap_compress(&info, + SkNDKConversions::toDataSpace(pmap.colorSpace()), pmap.addr(), androidFormat, quality, + reinterpret_cast(stream), write_to_stream); +} diff --git a/gfx/skia/skia/src/ports/SkImageEncoder_WIC.cpp b/gfx/skia/skia/src/ports/SkImageEncoder_WIC.cpp new file mode 100644 index 0000000000..1a37e57a61 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageEncoder_WIC.cpp @@ -0,0 +1,198 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" + +#if defined(SK_BUILD_FOR_WIN) + +#include "include/core/SkBitmap.h" +#include "include/core/SkImageEncoder.h" +#include "include/core/SkStream.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/private/base/SkTemplates.h" +#include "src/base/SkAutoMalloc.h" +#include "src/encode/SkImageEncoderPriv.h" +#include "src/utils/win/SkAutoCoInitialize.h" +#include "src/utils/win/SkIStream.h" +#include "src/utils/win/SkTScopedComPtr.h" +#include + +//All Windows SDKs back to XPSP2 export the CLSID_WICImagingFactory symbol. +//In the Windows8 SDK the CLSID_WICImagingFactory symbol is still exported +//but CLSID_WICImagingFactory is then #defined to CLSID_WICImagingFactory2. +//Undo this #define if it has been done so that we link against the symbols +//we intended to link against on all SDKs. +#if defined(CLSID_WICImagingFactory) +#undef CLSID_WICImagingFactory +#endif + +bool SkEncodeImageWithWIC(SkWStream* stream, const SkPixmap& pixmap, + SkEncodedImageFormat format, int quality) { + GUID type; + switch (format) { + case SkEncodedImageFormat::kJPEG: + type = GUID_ContainerFormatJpeg; + break; + case SkEncodedImageFormat::kPNG: + type = GUID_ContainerFormatPng; + break; + default: + return false; + } + SkBitmap bitmapOrig; + if (!bitmapOrig.installPixels(pixmap)) { + return false; + } + bitmapOrig.setImmutable(); + + // First convert to BGRA if necessary. + SkBitmap bitmap; + if (!bitmap.tryAllocPixels(bitmapOrig.info().makeColorType(kBGRA_8888_SkColorType)) || + !bitmapOrig.readPixels(bitmap.info(), bitmap.getPixels(), bitmap.rowBytes(), 0, 0)) + { + return false; + } + + // WIC expects unpremultiplied pixels. Unpremultiply if necessary. + if (kPremul_SkAlphaType == bitmap.alphaType()) { + uint8_t* pixels = reinterpret_cast(bitmap.getPixels()); + for (int y = 0; y < bitmap.height(); ++y) { + for (int x = 0; x < bitmap.width(); ++x) { + uint8_t* bytes = pixels + y * bitmap.rowBytes() + x * bitmap.bytesPerPixel(); + SkPMColor* src = reinterpret_cast(bytes); + SkColor* dst = reinterpret_cast(bytes); + *dst = SkUnPreMultiply::PMColorToColor(*src); + } + } + } + + // Finally, if we are performing a jpeg encode, we must convert to BGR. + void* pixels = bitmap.getPixels(); + size_t rowBytes = bitmap.rowBytes(); + SkAutoMalloc pixelStorage; + WICPixelFormatGUID formatDesired = GUID_WICPixelFormat32bppBGRA; + if (SkEncodedImageFormat::kJPEG == format) { + formatDesired = GUID_WICPixelFormat24bppBGR; + rowBytes = SkAlign4(bitmap.width() * 3); + pixelStorage.reset(rowBytes * bitmap.height()); + for (int y = 0; y < bitmap.height(); y++) { + uint8_t* dstRow = SkTAddOffset(pixelStorage.get(), y * rowBytes); + for (int x = 0; x < bitmap.width(); x++) { + uint32_t bgra = *bitmap.getAddr32(x, y); + dstRow[0] = (uint8_t) ((bgra >> 0) & 0xFF); + dstRow[1] = (uint8_t) ((bgra >> 8) & 0xFF); + dstRow[2] = (uint8_t) ((bgra >> 16) & 0xFF); + dstRow += 3; + } + } + + pixels = pixelStorage.get(); + } + + + //Initialize COM. + SkAutoCoInitialize scopedCo; + if (!scopedCo.succeeded()) { + return false; + } + + HRESULT hr = S_OK; + + //Create Windows Imaging Component ImagingFactory. + SkTScopedComPtr piImagingFactory; + if (SUCCEEDED(hr)) { + hr = CoCreateInstance( + CLSID_WICImagingFactory + , nullptr + , CLSCTX_INPROC_SERVER + , IID_PPV_ARGS(&piImagingFactory) + ); + } + + //Convert the SkWStream to an IStream. + SkTScopedComPtr piStream; + if (SUCCEEDED(hr)) { + hr = SkWIStream::CreateFromSkWStream(stream, &piStream); + } + + //Create an encode of the appropriate type. + SkTScopedComPtr piEncoder; + if (SUCCEEDED(hr)) { + hr = piImagingFactory->CreateEncoder(type, nullptr, &piEncoder); + } + + if (SUCCEEDED(hr)) { + hr = piEncoder->Initialize(piStream.get(), WICBitmapEncoderNoCache); + } + + //Create a the frame. + SkTScopedComPtr piBitmapFrameEncode; + SkTScopedComPtr piPropertybag; + if (SUCCEEDED(hr)) { + hr = piEncoder->CreateNewFrame(&piBitmapFrameEncode, &piPropertybag); + } + + if (SUCCEEDED(hr)) { + PROPBAG2 name; + memset(&name, 0, sizeof(name)); + name.dwType = PROPBAG2_TYPE_DATA; + name.vt = VT_R4; + name.pstrName = const_cast(L"ImageQuality"); + + VARIANT value; + VariantInit(&value); + value.vt = VT_R4; + value.fltVal = (FLOAT)(quality / 100.0); + + //Ignore result code. + // This returns E_FAIL if the named property is not in the bag. + //TODO(bungeman) enumerate the properties, + // write and set hr iff property exists. + piPropertybag->Write(1, &name, &value); + } + if (SUCCEEDED(hr)) { + hr = piBitmapFrameEncode->Initialize(piPropertybag.get()); + } + + //Set the size of the frame. + const UINT width = bitmap.width(); + const UINT height = bitmap.height(); + if (SUCCEEDED(hr)) { + hr = piBitmapFrameEncode->SetSize(width, height); + } + + //Set the pixel format of the frame. If native encoded format cannot match BGRA, + //it will choose the closest pixel format that it supports. + WICPixelFormatGUID formatGUID = formatDesired; + if (SUCCEEDED(hr)) { + hr = piBitmapFrameEncode->SetPixelFormat(&formatGUID); + } + if (SUCCEEDED(hr)) { + //Be sure the image format is the one requested. + hr = IsEqualGUID(formatGUID, formatDesired) ? S_OK : E_FAIL; + } + + //Write the pixels into the frame. + if (SUCCEEDED(hr)) { + hr = piBitmapFrameEncode->WritePixels(height, + (UINT) rowBytes, + (UINT) rowBytes * height, + reinterpret_cast(pixels)); + } + + if (SUCCEEDED(hr)) { + hr = piBitmapFrameEncode->Commit(); + } + + if (SUCCEEDED(hr)) { + hr = piEncoder->Commit(); + } + + return SUCCEEDED(hr); +} + +#endif // defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkImageGeneratorCG.cpp b/gfx/skia/skia/src/ports/SkImageGeneratorCG.cpp new file mode 100644 index 0000000000..e01283d8ae --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageGeneratorCG.cpp @@ -0,0 +1,157 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/codec/SkEncodedOrigin.h" +#include "include/ports/SkImageGeneratorCG.h" +#include "include/private/base/SkTemplates.h" +#include "include/utils/mac/SkCGUtils.h" +#include "src/codec/SkPixmapUtils.h" +#include "src/utils/mac/SkUniqueCFRef.h" + +#ifdef SK_BUILD_FOR_MAC +#include +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#include +#include +#endif + +namespace { +class ImageGeneratorCG : public SkImageGenerator { +public: + ImageGeneratorCG(const SkImageInfo&, SkUniqueCFRef imageSrc, + sk_sp data, SkEncodedOrigin); + +protected: + sk_sp onRefEncodedData() override; + + bool onGetPixels(const SkImageInfo&, void* pixels, size_t rowBytes, const Options&) override; + +private: + const SkUniqueCFRef fImageSrc; + const sk_sp fData; + const SkEncodedOrigin fOrigin; + + using INHERITED = SkImageGenerator; +}; + +static SkUniqueCFRef data_to_CGImageSrc(SkData* data) { + SkUniqueCFRef cgData( + CGDataProviderCreateWithData(data, data->data(), data->size(), nullptr)); + if (!cgData) { + return nullptr; + } + return SkUniqueCFRef( + CGImageSourceCreateWithDataProvider(cgData.get(), nullptr)); +} + +} // namespace + +std::unique_ptr SkImageGeneratorCG::MakeFromEncodedCG(sk_sp data) { + SkUniqueCFRef imageSrc = data_to_CGImageSrc(data.get()); + if (!imageSrc) { + return nullptr; + } + + SkUniqueCFRef properties( + CGImageSourceCopyPropertiesAtIndex(imageSrc.get(), 0, nullptr)); + if (!properties) { + return nullptr; + } + + CFNumberRef widthRef = static_cast( + CFDictionaryGetValue(properties.get(), kCGImagePropertyPixelWidth)); + CFNumberRef heightRef = static_cast( + CFDictionaryGetValue(properties.get(), kCGImagePropertyPixelHeight)); + if (nullptr == widthRef || nullptr == heightRef) { + return nullptr; + } + + int width, height; + if (!CFNumberGetValue(widthRef , kCFNumberIntType, &width ) || + !CFNumberGetValue(heightRef, kCFNumberIntType, &height)) + { + return nullptr; + } + + bool hasAlpha = bool(CFDictionaryGetValue(properties.get(), kCGImagePropertyHasAlpha)); + SkAlphaType alphaType = hasAlpha ? kPremul_SkAlphaType : kOpaque_SkAlphaType; + SkImageInfo info = SkImageInfo::MakeS32(width, height, alphaType); + + SkEncodedOrigin origin = kDefault_SkEncodedOrigin; + CFNumberRef orientationRef = static_cast( + CFDictionaryGetValue(properties.get(), kCGImagePropertyOrientation)); + int originInt; + if (orientationRef && CFNumberGetValue(orientationRef, kCFNumberIntType, &originInt)) { + origin = (SkEncodedOrigin) originInt; + } + + if (SkEncodedOriginSwapsWidthHeight(origin)) { + info = SkPixmapUtils::SwapWidthHeight(info); + } + + // FIXME: We have the opportunity to extract color space information here, + // though I think it makes sense to wait until we understand how + // we want to communicate it to the generator. + + return std::unique_ptr(new ImageGeneratorCG(info, std::move(imageSrc), + std::move(data), origin)); +} + +ImageGeneratorCG::ImageGeneratorCG(const SkImageInfo& info, SkUniqueCFRef src, + sk_sp data, SkEncodedOrigin origin) + : INHERITED(info) + , fImageSrc(std::move(src)) + , fData(std::move(data)) + , fOrigin(origin) +{} + +sk_sp ImageGeneratorCG::onRefEncodedData() { + return fData; +} + +bool ImageGeneratorCG::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + const Options&) +{ + if (kN32_SkColorType != info.colorType()) { + // FIXME: Support other colorTypes. + return false; + } + + switch (info.alphaType()) { + case kOpaque_SkAlphaType: + if (kOpaque_SkAlphaType != this->getInfo().alphaType()) { + return false; + } + break; + case kPremul_SkAlphaType: + break; + default: + return false; + } + + SkUniqueCFRef image(CGImageSourceCreateImageAtIndex(fImageSrc.get(), 0, nullptr)); + if (!image) { + return false; + } + + SkPixmap dst(info, pixels, rowBytes); + auto decode = [&image](const SkPixmap& pm) { + // FIXME: Using SkCopyPixelsFromCGImage (as opposed to swizzling + // ourselves) greatly restricts the color and alpha types that we + // support. If we swizzle ourselves, we can add support for: + // kUnpremul_SkAlphaType + // 16-bit per component RGBA + // kGray_8_SkColorType + // Additionally, it would be interesting to compare the performance + // of SkSwizzler with CG's built in swizzler. + return SkCopyPixelsFromCGImage(pm, image.get()); + }; + return SkPixmapUtils::Orient(dst, fOrigin, decode); +} diff --git a/gfx/skia/skia/src/ports/SkImageGeneratorNDK.cpp b/gfx/skia/skia/src/ports/SkImageGeneratorNDK.cpp new file mode 100644 index 0000000000..7d050b9704 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageGeneratorNDK.cpp @@ -0,0 +1,222 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImageGenerator.h" +#include "include/core/SkImageInfo.h" +#include "include/ports/SkImageGeneratorNDK.h" +#include "src/ports/SkNDKConversions.h" + +#include +#include +#include + +namespace { +class ImageGeneratorNDK : public SkImageGenerator { +public: + ImageGeneratorNDK(const SkImageInfo&, sk_sp, AImageDecoder*); + ~ImageGeneratorNDK() override; + +protected: + sk_sp onRefEncodedData() override; + + bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + const Options& opts) override; + +private: + sk_sp fData; + AImageDecoder* fDecoder; + // Setting the ADataSpace is sticky - it is set for all future decodes + // until it is set again. But as of R there is no way to reset it to + // ADATASPACE_UNKNOWN to skip color correction. If the client requests + // skipping correction after having set it to something else, we need + // to recreate the AImageDecoder. + bool fPreviouslySetADataSpace; + + using INHERITED = SkImageGenerator; +}; + +} // anonymous namespace + +static bool ok(int result) { + return result == ANDROID_IMAGE_DECODER_SUCCESS; +} + +static bool set_android_bitmap_format(AImageDecoder* decoder, SkColorType colorType) { + auto format = SkNDKConversions::toAndroidBitmapFormat(colorType); + return ok(AImageDecoder_setAndroidBitmapFormat(decoder, format)); +} + +static SkColorType colorType(AImageDecoder* decoder, const AImageDecoderHeaderInfo* headerInfo) { + // AImageDecoder never defaults to gray, but allows setting it if the image is 8 bit gray. + if (set_android_bitmap_format(decoder, kGray_8_SkColorType)) { + return kGray_8_SkColorType; + } + + auto format = static_cast( + AImageDecoderHeaderInfo_getAndroidBitmapFormat(headerInfo)); + return SkNDKConversions::toColorType(format); +} + +static sk_sp get_default_colorSpace(const AImageDecoderHeaderInfo* headerInfo) { + auto dataSpace = static_cast(AImageDecoderHeaderInfo_getDataSpace(headerInfo)); + if (auto cs = SkNDKConversions::toColorSpace(dataSpace)) { + return cs; + } + + return SkColorSpace::MakeSRGB(); +} + +std::unique_ptr SkImageGeneratorNDK::MakeFromEncodedNDK(sk_sp data) { + if (!data) return nullptr; + + AImageDecoder* rawDecoder; + if (!ok(AImageDecoder_createFromBuffer(data->data(), data->size(), &rawDecoder))) { + return nullptr; + } + + const AImageDecoderHeaderInfo* headerInfo = AImageDecoder_getHeaderInfo(rawDecoder); + int32_t width = AImageDecoderHeaderInfo_getWidth(headerInfo); + int32_t height = AImageDecoderHeaderInfo_getHeight(headerInfo); + SkColorType ct = colorType(rawDecoder, headerInfo); + + // Although the encoded data stores unpremultiplied pixels, AImageDecoder defaults to premul + // (if the image may have alpha). + SkAlphaType at = AImageDecoderHeaderInfo_getAlphaFlags(headerInfo) + == ANDROID_BITMAP_FLAGS_ALPHA_OPAQUE ? kOpaque_SkAlphaType : kPremul_SkAlphaType; + auto imageInfo = SkImageInfo::Make(width, height, ct, at, get_default_colorSpace(headerInfo)); + return std::unique_ptr( + new ImageGeneratorNDK(imageInfo, std::move(data), rawDecoder)); +} + +ImageGeneratorNDK::ImageGeneratorNDK(const SkImageInfo& info, sk_sp data, + AImageDecoder* decoder) + : INHERITED(info) + , fData(std::move(data)) + , fDecoder(decoder) + , fPreviouslySetADataSpace(false) +{ + SkASSERT(fDecoder); +} + +ImageGeneratorNDK::~ImageGeneratorNDK() { + AImageDecoder_delete(fDecoder); +} + +static bool set_target_size(AImageDecoder* decoder, const SkISize& size, const SkISize targetSize) { + if (size != targetSize) { + // AImageDecoder will scale to arbitrary sizes. Only support a size if it's supported by the + // underlying library. + const AImageDecoderHeaderInfo* headerInfo = AImageDecoder_getHeaderInfo(decoder); + const char* mimeType = AImageDecoderHeaderInfo_getMimeType(headerInfo); + if (0 == strcmp(mimeType, "image/jpeg")) { + bool supported = false; + for (int sampleSize : { 2, 4, 8 }) { + int32_t width; + int32_t height; + if (ok(AImageDecoder_computeSampledSize(decoder, sampleSize, &width, &height)) + && targetSize == SkISize::Make(width, height)) { + supported = true; + break; + } + } + if (!supported) return false; + } else if (0 == strcmp(mimeType, "image/webp")) { + // libwebp supports arbitrary downscaling. + if (targetSize.width() > size.width() || targetSize.height() > size.height()) { + return false; + } + } else { + return false; + } + } + return ok(AImageDecoder_setTargetSize(decoder, targetSize.width(), targetSize.height())); +} + +bool ImageGeneratorNDK::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + const Options& opts) { + if (auto* cs = info.colorSpace()) { + if (!ok(AImageDecoder_setDataSpace(fDecoder, SkNDKConversions::toDataSpace(cs)))) { + return false; + } + fPreviouslySetADataSpace = true; + } else { + // If the requested SkColorSpace is null, the client wants the "raw" colors, without color + // space transformations applied. (This is primarily useful for a client that wants to do + // their own color transformations.) This is AImageDecoder's default, but if a previous call + // set an ADataSpace, AImageDecoder is no longer using its default, so we need to set it + // back. + if (fPreviouslySetADataSpace) { + // AImageDecoderHeaderInfo_getDataSpace always returns the same value for the same + // image, regardless of prior calls to AImageDecoder_setDataSpace. Check if it's + // ADATASPACE_UNKNOWN, which needs to be handled specially. + const AImageDecoderHeaderInfo* headerInfo = AImageDecoder_getHeaderInfo(fDecoder); + const auto defaultDataSpace = AImageDecoderHeaderInfo_getDataSpace(headerInfo); + if (defaultDataSpace == ADATASPACE_UNKNOWN) { + // As of R, there's no way to reset AImageDecoder to ADATASPACE_UNKNOWN, so + // create a new one. + AImageDecoder* decoder; + if (!ok(AImageDecoder_createFromBuffer(fData->data(), fData->size(), &decoder))) { + return false; + } + AImageDecoder_delete(fDecoder); + fDecoder = decoder; + } else { + if (!ok(AImageDecoder_setDataSpace(fDecoder, defaultDataSpace))) { + return false; + } + } + + // Whether by recreating AImageDecoder or calling AImageDecoder_setDataSpace, the + // AImageDecoder is back to its default, so if the next call has a null SkColorSpace, it + // does not need to reset it again. + fPreviouslySetADataSpace = false; + } + } + + if (!set_android_bitmap_format(fDecoder, info.colorType())) { + return false; + } + + switch (info.alphaType()) { + case kUnknown_SkAlphaType: + return false; + case kOpaque_SkAlphaType: + if (this->getInfo().alphaType() != kOpaque_SkAlphaType) { + return false; + } + break; + case kUnpremul_SkAlphaType: + if (!ok(AImageDecoder_setUnpremultipliedRequired(fDecoder, true))) { + return false; + } + break; + case kPremul_SkAlphaType: + break; + } + + if (!set_target_size(fDecoder, getInfo().dimensions(), info.dimensions())) { + return false; + } + + auto byteSize = info.computeByteSize(rowBytes); + switch (AImageDecoder_decodeImage(fDecoder, pixels, rowBytes, byteSize)) { + case ANDROID_IMAGE_DECODER_INCOMPLETE: + // The image was partially decoded, but the input was truncated. The client may be + // happy with the partial image. + case ANDROID_IMAGE_DECODER_ERROR: + // Similarly, the image was partially decoded, but the input had an error. The client + // may be happy with the partial image. + case ANDROID_IMAGE_DECODER_SUCCESS: + return true; + default: + return false; + } +} + +sk_sp ImageGeneratorNDK::onRefEncodedData() { + return fData; +} diff --git a/gfx/skia/skia/src/ports/SkImageGeneratorWIC.cpp b/gfx/skia/skia/src/ports/SkImageGeneratorWIC.cpp new file mode 100644 index 0000000000..225ec8facf --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageGeneratorWIC.cpp @@ -0,0 +1,205 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "include/ports/SkImageGeneratorWIC.h" +#include "include/private/base/SkTemplates.h" +#include "src/utils/win/SkIStream.h" +#include "src/utils/win/SkTScopedComPtr.h" + +#include + +// All Windows SDKs back to XPSP2 export the CLSID_WICImagingFactory symbol. +// In the Windows8 SDK the CLSID_WICImagingFactory symbol is still exported +// but CLSID_WICImagingFactory is then #defined to CLSID_WICImagingFactory2. +// Undo this #define if it has been done so that we link against the symbols +// we intended to link against on all SDKs. +#if defined(CLSID_WICImagingFactory) + #undef CLSID_WICImagingFactory +#endif + +namespace { +class ImageGeneratorWIC : public SkImageGenerator { +public: + /* + * Takes ownership of the imagingFactory + * Takes ownership of the imageSource + */ + ImageGeneratorWIC(const SkImageInfo& info, IWICImagingFactory* imagingFactory, + IWICBitmapSource* imageSource, sk_sp); +protected: + sk_sp onRefEncodedData() override; + + bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, const Options&) + override; + +private: + SkTScopedComPtr fImagingFactory; + SkTScopedComPtr fImageSource; + sk_sp fData; + + using INHERITED = SkImageGenerator; +}; +} // namespace + +std::unique_ptr SkImageGeneratorWIC::MakeFromEncodedWIC(sk_sp data) { + // Create Windows Imaging Component ImagingFactory. + SkTScopedComPtr imagingFactory; + HRESULT hr = CoCreateInstance(CLSID_WICImagingFactory, nullptr, CLSCTX_INPROC_SERVER, + IID_PPV_ARGS(&imagingFactory)); + if (FAILED(hr)) { + return nullptr; + } + + // Create an IStream. + SkTScopedComPtr iStream; + // Note that iStream will take ownership of the new memory stream because + // we set |deleteOnRelease| to true. + hr = SkIStream::CreateFromSkStream(std::make_unique(data), &iStream); + if (FAILED(hr)) { + return nullptr; + } + + // Create the decoder from the stream. + SkTScopedComPtr decoder; + hr = imagingFactory->CreateDecoderFromStream(iStream.get(), nullptr, + WICDecodeMetadataCacheOnDemand, &decoder); + if (FAILED(hr)) { + return nullptr; + } + + // Select the first frame from the decoder. + SkTScopedComPtr imageFrame; + hr = decoder->GetFrame(0, &imageFrame); + if (FAILED(hr)) { + return nullptr; + } + + // Treat the frame as an image source. + SkTScopedComPtr imageSource; + hr = imageFrame->QueryInterface(IID_PPV_ARGS(&imageSource)); + if (FAILED(hr)) { + return nullptr; + } + + // Get the size of the image. + UINT width; + UINT height; + hr = imageSource->GetSize(&width, &height); + if (FAILED(hr)) { + return nullptr; + } + + // Get the encoded pixel format. + WICPixelFormatGUID format; + hr = imageSource->GetPixelFormat(&format); + if (FAILED(hr)) { + return nullptr; + } + + // Recommend kOpaque if the image is opaque and kPremul otherwise. + // FIXME: We are stuck recommending kPremul for all indexed formats + // (Ex: GUID_WICPixelFormat8bppIndexed) because we don't have + // a way to check if the image has alpha. + SkAlphaType alphaType = kPremul_SkAlphaType; + + if (GUID_WICPixelFormat16bppBGR555 == format || + GUID_WICPixelFormat16bppBGR565 == format || + GUID_WICPixelFormat32bppBGR101010 == format || + GUID_WICPixelFormatBlackWhite == format || + GUID_WICPixelFormat2bppGray == format || + GUID_WICPixelFormat4bppGray == format || + GUID_WICPixelFormat8bppGray == format || + GUID_WICPixelFormat16bppGray == format || + GUID_WICPixelFormat16bppGrayFixedPoint == format || + GUID_WICPixelFormat16bppGrayHalf == format || + GUID_WICPixelFormat32bppGrayFloat == format || + GUID_WICPixelFormat32bppGrayFixedPoint == format || + GUID_WICPixelFormat32bppRGBE == format || + GUID_WICPixelFormat24bppRGB == format || + GUID_WICPixelFormat24bppBGR == format || + GUID_WICPixelFormat32bppBGR == format || + GUID_WICPixelFormat48bppRGB == format || + GUID_WICPixelFormat48bppBGR == format || + GUID_WICPixelFormat48bppRGBFixedPoint == format || + GUID_WICPixelFormat48bppBGRFixedPoint == format || + GUID_WICPixelFormat48bppRGBHalf == format || + GUID_WICPixelFormat64bppRGBFixedPoint == format || + GUID_WICPixelFormat64bppRGBHalf == format || + GUID_WICPixelFormat96bppRGBFixedPoint == format || + GUID_WICPixelFormat128bppRGBFloat == format || + GUID_WICPixelFormat128bppRGBFixedPoint == format || + GUID_WICPixelFormat32bppRGB == format || + GUID_WICPixelFormat64bppRGB == format || + GUID_WICPixelFormat96bppRGBFloat == format || + GUID_WICPixelFormat32bppCMYK == format || + GUID_WICPixelFormat64bppCMYK == format || + GUID_WICPixelFormat8bppY == format || + GUID_WICPixelFormat8bppCb == format || + GUID_WICPixelFormat8bppCr == format || + GUID_WICPixelFormat16bppCbCr == format) + { + alphaType = kOpaque_SkAlphaType; + } + + // FIXME: If we change the implementation to handle swizzling ourselves, + // we can support more output formats. + SkImageInfo info = SkImageInfo::MakeS32(width, height, alphaType); + return std::unique_ptr( + new ImageGeneratorWIC(info, imagingFactory.release(), imageSource.release(), + std::move(data))); +} + +ImageGeneratorWIC::ImageGeneratorWIC(const SkImageInfo& info, + IWICImagingFactory* imagingFactory, IWICBitmapSource* imageSource, sk_sp data) + : INHERITED(info) + , fImagingFactory(imagingFactory) + , fImageSource(imageSource) + , fData(std::move(data)) +{} + +sk_sp ImageGeneratorWIC::onRefEncodedData() { + return fData; +} + +bool ImageGeneratorWIC::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, + const Options&) { + if (kN32_SkColorType != info.colorType()) { + return false; + } + + // Create a format converter. + SkTScopedComPtr formatConverter; + HRESULT hr = fImagingFactory->CreateFormatConverter(&formatConverter); + if (FAILED(hr)) { + return false; + } + + GUID format = GUID_WICPixelFormat32bppPBGRA; + if (kUnpremul_SkAlphaType == info.alphaType()) { + format = GUID_WICPixelFormat32bppBGRA; + } + + hr = formatConverter->Initialize(fImageSource.get(), format, WICBitmapDitherTypeNone, nullptr, + 0.0, WICBitmapPaletteTypeCustom); + if (FAILED(hr)) { + return false; + } + + // Treat the format converter as an image source. + SkTScopedComPtr formatConverterSrc; + hr = formatConverter->QueryInterface(IID_PPV_ARGS(&formatConverterSrc)); + if (FAILED(hr)) { + return false; + } + + // Set the destination pixels. + hr = formatConverterSrc->CopyPixels(nullptr, (UINT) rowBytes, (UINT) rowBytes * info.height(), + (BYTE*) pixels); + + return SUCCEEDED(hr); +} diff --git a/gfx/skia/skia/src/ports/SkImageGenerator_none.cpp b/gfx/skia/skia/src/ports/SkImageGenerator_none.cpp new file mode 100644 index 0000000000..226bb126c1 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageGenerator_none.cpp @@ -0,0 +1,13 @@ +/* + * Copyright 2015 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkImageGenerator.h" + +std::unique_ptr SkImageGenerator::MakeFromEncodedImpl( + sk_sp, std::optional) { + return nullptr; +} diff --git a/gfx/skia/skia/src/ports/SkImageGenerator_skia.cpp b/gfx/skia/skia/src/ports/SkImageGenerator_skia.cpp new file mode 100644 index 0000000000..e0f990d388 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkImageGenerator_skia.cpp @@ -0,0 +1,14 @@ +/* + * Copyright 2015 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkData.h" +#include "src/codec/SkCodecImageGenerator.h" + +std::unique_ptr SkImageGenerator::MakeFromEncodedImpl( + sk_sp data, std::optional at) { + return SkCodecImageGenerator::MakeFromEncodedCodec(std::move(data), at); +} diff --git a/gfx/skia/skia/src/ports/SkMemory_malloc.cpp b/gfx/skia/skia/src/ports/SkMemory_malloc.cpp new file mode 100644 index 0000000000..085c07acde --- /dev/null +++ b/gfx/skia/skia/src/ports/SkMemory_malloc.cpp @@ -0,0 +1,110 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkAssert.h" +#include "include/private/base/SkDebug.h" +#include "include/private/base/SkFeatures.h" +#include "include/private/base/SkMalloc.h" + +#include + +#if defined(SK_DEBUG) && defined(SK_BUILD_FOR_WIN) +#include +// This is a super stable value and setting it here avoids pulling in all of windows.h. +#ifndef FAST_FAIL_FATAL_APP_EXIT +#define FAST_FAIL_FATAL_APP_EXIT 7 +#endif +#endif + +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + #define SK_DEBUGFAILF(fmt, ...) SK_ABORT(fmt"\n", __VA_ARGS__) +#else + #define SK_DEBUGFAILF(fmt, ...) SkASSERT((SkDebugf(fmt"\n", __VA_ARGS__), false)) +#endif + +static inline void sk_out_of_memory(size_t size) { + SK_DEBUGFAILF("sk_out_of_memory (asked for %zu bytes)", + size); +#if defined(SK_BUILD_FOR_AFL_FUZZ) + exit(1); +#else + abort(); +#endif +} + +static inline void* throw_on_failure(size_t size, void* p) { + if (size > 0 && p == nullptr) { + // If we've got a nullptr here, the only reason we should have failed is running out of RAM. + sk_out_of_memory(size); + } + return p; +} + +bool sk_abort_is_enabled() { return true; } + +void sk_abort_no_print() { +#if defined(SK_DEBUG) && defined(SK_BUILD_FOR_WIN) + __fastfail(FAST_FAIL_FATAL_APP_EXIT); +#elif defined(__clang__) + __builtin_trap(); +#else + abort(); +#endif +} + +void sk_out_of_memory(void) { + SkDEBUGFAIL("sk_out_of_memory"); +#if defined(SK_BUILD_FOR_AFL_FUZZ) + exit(1); +#else + abort(); +#endif +} + +void* sk_realloc_throw(void* addr, size_t size) { + if (size == 0) { + sk_free(addr); + return nullptr; + } + return throw_on_failure(size, realloc(addr, size)); +} + +void sk_free(void* p) { + // The guard here produces a performance improvement across many tests, and many platforms. + // Removing the check was tried in skia cl 588037. + if (p != nullptr) { + free(p); + } +} + +void* sk_malloc_flags(size_t size, unsigned flags) { + void* p; + if (flags & SK_MALLOC_ZERO_INITIALIZE) { + p = calloc(size, 1); + } else { +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) && defined(__BIONIC__) + /* TODO: After b/169449588 is fixed, we will want to change this to restore + * original behavior instead of always disabling the flag. + * TODO: After b/158870657 is fixed and scudo is used globally, we can assert when an + * an error is returned. + */ + // malloc() generally doesn't initialize its memory and that's a huge security hole, + // so Android has replaced its malloc() with one that zeros memory, + // but that's a huge performance hit for HWUI, so turn it back off again. + (void)mallopt(M_THREAD_DISABLE_MEM_INIT, 1); +#endif + p = malloc(size); +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) && defined(__BIONIC__) + (void)mallopt(M_THREAD_DISABLE_MEM_INIT, 0); +#endif + } + if (flags & SK_MALLOC_THROW) { + return throw_on_failure(size, p); + } else { + return p; + } +} diff --git a/gfx/skia/skia/src/ports/SkMemory_mozalloc.cpp b/gfx/skia/skia/src/ports/SkMemory_mozalloc.cpp new file mode 100644 index 0000000000..edf0b8e0ec --- /dev/null +++ b/gfx/skia/skia/src/ports/SkMemory_mozalloc.cpp @@ -0,0 +1,49 @@ +/* + * Copyright 2011 Google Inc. + * Copyright 2012 Mozilla Foundation + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkMalloc.h" + +#include "include/core/SkTypes.h" +#include "mozilla/mozalloc.h" +#include "mozilla/mozalloc_abort.h" +#include "mozilla/mozalloc_oom.h" +#include "prenv.h" + +bool sk_abort_is_enabled() { +#ifdef SK_DEBUG + const char* env = PR_GetEnv("MOZ_SKIA_DISABLE_ASSERTS"); + if (env && *env != '0') { + return false; + } +#endif + return true; +} + +void sk_abort_no_print() { + mozalloc_abort("Abort from sk_abort"); +} + +void sk_out_of_memory(void) { + SkDEBUGFAIL("sk_out_of_memory"); + mozalloc_handle_oom(0); +} + +void sk_free(void* p) { + free(p); +} + +void* sk_realloc_throw(void* addr, size_t size) { + return moz_xrealloc(addr, size); +} + +void* sk_malloc_flags(size_t size, unsigned flags) { + if (flags & SK_MALLOC_ZERO_INITIALIZE) { + return (flags & SK_MALLOC_THROW) ? moz_xcalloc(size, 1) : calloc(size, 1); + } + return (flags & SK_MALLOC_THROW) ? moz_xmalloc(size) : malloc(size); +} diff --git a/gfx/skia/skia/src/ports/SkNDKConversions.cpp b/gfx/skia/skia/src/ports/SkNDKConversions.cpp new file mode 100644 index 0000000000..a977815db2 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkNDKConversions.cpp @@ -0,0 +1,119 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/ports/SkNDKConversions.h" + +namespace { +static const struct { + SkColorType colorType; + AndroidBitmapFormat format; +} gColorTypeTable[] = { + { kRGBA_8888_SkColorType, ANDROID_BITMAP_FORMAT_RGBA_8888 }, + { kRGBA_F16_SkColorType, ANDROID_BITMAP_FORMAT_RGBA_F16 }, + { kRGB_565_SkColorType, ANDROID_BITMAP_FORMAT_RGB_565 }, + // Android allows using its alpha 8 format to get 8 bit gray pixels. + { kGray_8_SkColorType, ANDROID_BITMAP_FORMAT_A_8 }, +}; + +} // anonymous namespace + +namespace SkNDKConversions { + AndroidBitmapFormat toAndroidBitmapFormat(SkColorType colorType) { + for (const auto& entry : gColorTypeTable) { + if (entry.colorType == colorType) { + return entry.format; + } + } + return ANDROID_BITMAP_FORMAT_NONE; + } + + SkColorType toColorType(AndroidBitmapFormat format) { + for (const auto& entry : gColorTypeTable) { + if (entry.format == format) { + return entry.colorType; + } + } + return kUnknown_SkColorType; + } + +} // SkNDKConversions + +static constexpr skcms_TransferFunction k2Dot6 = {2.6f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f}; + +static constexpr skcms_Matrix3x3 kDCIP3 = {{ + {0.486143, 0.323835, 0.154234}, + {0.226676, 0.710327, 0.0629966}, + {0.000800549, 0.0432385, 0.78275}, +}}; + +namespace { +static const struct { + ADataSpace dataSpace; + skcms_TransferFunction transferFunction; + skcms_Matrix3x3 gamut; +} gColorSpaceTable[] = { + { ADATASPACE_SRGB, SkNamedTransferFn::kSRGB, SkNamedGamut::kSRGB }, + { ADATASPACE_SCRGB, SkNamedTransferFn::kSRGB, SkNamedGamut::kSRGB }, + { ADATASPACE_SCRGB_LINEAR, SkNamedTransferFn::kLinear, SkNamedGamut::kSRGB }, + { ADATASPACE_SRGB_LINEAR, SkNamedTransferFn::kLinear, SkNamedGamut::kSRGB }, + { ADATASPACE_ADOBE_RGB, SkNamedTransferFn::k2Dot2, SkNamedGamut::kAdobeRGB }, + { ADATASPACE_DISPLAY_P3, SkNamedTransferFn::kSRGB, SkNamedGamut::kDisplayP3 }, + { ADATASPACE_BT2020, SkNamedTransferFn::kRec2020, SkNamedGamut::kRec2020 }, + { ADATASPACE_BT709, SkNamedTransferFn::kRec2020, SkNamedGamut::kSRGB }, + { ADATASPACE_DCI_P3, k2Dot6, kDCIP3 }, +}; + +} // anonymous namespace + +static bool nearly_equal(float a, float b) { + return fabs(a - b) < .002f; +} + +static bool nearly_equal(const skcms_TransferFunction& x, const skcms_TransferFunction& y) { + return nearly_equal(x.g, y.g) + && nearly_equal(x.a, y.a) + && nearly_equal(x.b, y.b) + && nearly_equal(x.c, y.c) + && nearly_equal(x.d, y.d) + && nearly_equal(x.e, y.e) + && nearly_equal(x.f, y.f); +} + +static bool nearly_equal(const skcms_Matrix3x3& a, const skcms_Matrix3x3& b) { + for (int i = 0; i < 3; i++) + for (int j = 0; j < 3; j++) { + if (!nearly_equal(a.vals[i][j], b.vals[i][j])) return false; + } + return true; +} + +namespace SkNDKConversions { + ADataSpace toDataSpace(SkColorSpace* cs) { + if (!cs) return ADATASPACE_SRGB; + + skcms_TransferFunction fn; + skcms_Matrix3x3 gamut; + if (cs->isNumericalTransferFn(&fn) && cs->toXYZD50(&gamut)) { + for (const auto& entry : gColorSpaceTable) { + if (nearly_equal(gamut, entry.gamut) && nearly_equal(fn, entry.transferFunction)) { + return entry.dataSpace; + } + } + } + return ADATASPACE_UNKNOWN; + } + + sk_sp toColorSpace(ADataSpace dataSpace) { + for (const auto& entry : gColorSpaceTable) { + if (entry.dataSpace == dataSpace) { + return SkColorSpace::MakeRGB(entry.transferFunction, entry.gamut); + } + } + return nullptr; + } +} + diff --git a/gfx/skia/skia/src/ports/SkNDKConversions.h b/gfx/skia/skia/src/ports/SkNDKConversions.h new file mode 100644 index 0000000000..03b124a3af --- /dev/null +++ b/gfx/skia/skia/src/ports/SkNDKConversions.h @@ -0,0 +1,31 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkNDKConversions_DEFINED +#define SkNDKConversions_DEFINED + +#include "include/core/SkColorSpace.h" +#include "include/core/SkImageInfo.h" + +#include +#include + +namespace SkNDKConversions { + // Supports a small subset of SkColorType. Others are treated as + // ANDROID_BITMAP_FORMAT_NONE. + AndroidBitmapFormat toAndroidBitmapFormat(SkColorType); + + SkColorType toColorType(AndroidBitmapFormat); + + // Treats null as ADATASPACE_SRGB. + ADataSpace toDataSpace(SkColorSpace*); + + // Treats ADATASPACE_UNKNOWN as nullptr. + sk_sp toColorSpace(ADataSpace); +} + +#endif // SkNDKConversions_DEFINED diff --git a/gfx/skia/skia/src/ports/SkOSFile_ios.h b/gfx/skia/skia/src/ports/SkOSFile_ios.h new file mode 100644 index 0000000000..67e7e7b959 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkOSFile_ios.h @@ -0,0 +1,52 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOSFile_ios_DEFINED +#define SkOSFile_ios_DEFINED + +#include "include/core/SkString.h" + +#ifdef SK_BUILD_FOR_IOS +#import + +#include "include/ports/SkCFObject.h" + +static bool ios_get_path_in_bundle(const char path[], SkString* result) { + // Get a reference to the main bundle + CFBundleRef mainBundle = CFBundleGetMainBundle(); + + // Get a reference to the file's URL + // Use this to normalize the path + sk_cfp pathURL(CFURLCreateFromFileSystemRepresentation(/*allocator=*/nullptr, + (const UInt8*)path, + strlen(path), + /*isDirectory=*/false)); + sk_cfp pathRef(CFURLCopyFileSystemPath(pathURL.get(), kCFURLPOSIXPathStyle)); + // We use "data" as our subdirectory to match {{bundle_resources_dir}}/data in GN + // Unfortunately "resources" is not a valid top-level name in iOS, so we push it one level down + sk_cfp fileURL(CFBundleCopyResourceURL(mainBundle, pathRef.get(), + /*resourceType=*/nullptr, CFSTR("data"))); + if (!fileURL) { + return false; + } + if (!result) { + return true; + } + + // Convert the URL reference into a string reference + sk_cfp filePath(CFURLCopyFileSystemPath(fileURL.get(), kCFURLPOSIXPathStyle)); + + // Get the system encoding method + CFStringEncoding encodingMethod = CFStringGetSystemEncoding(); + + // Convert the string reference into an SkString + result->set(CFStringGetCStringPtr(filePath.get(), encodingMethod)); + return true; +} +#endif + +#endif // SkOSFile_ios_DEFINED diff --git a/gfx/skia/skia/src/ports/SkOSFile_posix.cpp b/gfx/skia/skia/src/ports/SkOSFile_posix.cpp new file mode 100644 index 0000000000..c8ba97412c --- /dev/null +++ b/gfx/skia/skia/src/ports/SkOSFile_posix.cpp @@ -0,0 +1,220 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTFitsIn.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkOSFile.h" + +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef SK_BUILD_FOR_IOS +#include "src/ports/SkOSFile_ios.h" +#endif + +void sk_fsync(FILE* f) { +#if !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__) && !defined(_NEWLIB_VERSION) + int fd = fileno(f); + fsync(fd); +#endif +} + +bool sk_exists(const char *path, SkFILE_Flags flags) { + int mode = F_OK; + if (flags & kRead_SkFILE_Flag) { + mode |= R_OK; + } + if (flags & kWrite_SkFILE_Flag) { + mode |= W_OK; + } +#ifdef SK_BUILD_FOR_IOS + // if the default path fails, check the bundle (but only if read-only) + if (0 == access(path, mode)) { + return true; + } else { + return (kRead_SkFILE_Flag == flags && ios_get_path_in_bundle(path, nullptr)); + } +#else + return (0 == access(path, mode)); +#endif +} + +typedef struct { + dev_t dev; + ino_t ino; +} SkFILEID; + +static bool sk_ino(FILE* a, SkFILEID* id) { + int fd = fileno(a); + if (fd < 0) { + return 0; + } + struct stat status; + if (0 != fstat(fd, &status)) { + return 0; + } + id->dev = status.st_dev; + id->ino = status.st_ino; + return true; +} + +bool sk_fidentical(FILE* a, FILE* b) { + SkFILEID aID, bID; + return sk_ino(a, &aID) && sk_ino(b, &bID) + && aID.ino == bID.ino + && aID.dev == bID.dev; +} + +void sk_fmunmap(const void* addr, size_t length) { + munmap(const_cast(addr), length); +} + +void* sk_fdmmap(int fd, size_t* size) { + struct stat status; + if (0 != fstat(fd, &status)) { + return nullptr; + } + if (!S_ISREG(status.st_mode)) { + return nullptr; + } + if (!SkTFitsIn(status.st_size)) { + return nullptr; + } + size_t fileSize = static_cast(status.st_size); + + void* addr = mmap(nullptr, fileSize, PROT_READ, MAP_PRIVATE, fd, 0); + if (MAP_FAILED == addr) { + return nullptr; + } + + *size = fileSize; + return addr; +} + +int sk_fileno(FILE* f) { + return fileno(f); +} + +void* sk_fmmap(FILE* f, size_t* size) { + int fd = sk_fileno(f); + if (fd < 0) { + return nullptr; + } + + return sk_fdmmap(fd, size); +} + +size_t sk_qread(FILE* file, void* buffer, size_t count, size_t offset) { + int fd = sk_fileno(file); + if (fd < 0) { + return SIZE_MAX; + } + ssize_t bytesRead = pread(fd, buffer, count, offset); + if (bytesRead < 0) { + return SIZE_MAX; + } + return bytesRead; +} + +//////////////////////////////////////////////////////////////////////////// + +struct SkOSFileIterData { + SkOSFileIterData() : fDIR(nullptr) { } + DIR* fDIR; + SkString fPath, fSuffix; +}; +static_assert(sizeof(SkOSFileIterData) <= SkOSFile::Iter::kStorageSize, "not_enough_space"); + +SkOSFile::Iter::Iter() { new (fSelf) SkOSFileIterData; } + +SkOSFile::Iter::Iter(const char path[], const char suffix[]) { + new (fSelf) SkOSFileIterData; + this->reset(path, suffix); +} + +SkOSFile::Iter::~Iter() { + SkOSFileIterData& self = *reinterpret_cast(fSelf); + if (self.fDIR) { + ::closedir(self.fDIR); + } + self.~SkOSFileIterData(); +} + +void SkOSFile::Iter::reset(const char path[], const char suffix[]) { + SkOSFileIterData& self = *reinterpret_cast(fSelf); + if (self.fDIR) { + ::closedir(self.fDIR); + self.fDIR = nullptr; + } + self.fPath.set(path); + + if (path) { + self.fDIR = ::opendir(path); +#ifdef SK_BUILD_FOR_IOS + // check bundle for directory + if (!self.fDIR && ios_get_path_in_bundle(path, &self.fPath)) { + self.fDIR = ::opendir(self.fPath.c_str()); + } +#endif + self.fSuffix.set(suffix); + } else { + self.fSuffix.reset(); + } +} + +// returns true if suffix is empty, or if str ends with suffix +static bool issuffixfor(const SkString& suffix, const char str[]) { + size_t suffixLen = suffix.size(); + size_t strLen = strlen(str); + + return strLen >= suffixLen && + memcmp(suffix.c_str(), str + strLen - suffixLen, suffixLen) == 0; +} + +bool SkOSFile::Iter::next(SkString* name, bool getDir) { + SkOSFileIterData& self = *reinterpret_cast(fSelf); + if (self.fDIR) { + dirent* entry; + + while ((entry = ::readdir(self.fDIR)) != nullptr) { + struct stat s; + SkString str(self.fPath); + + if (!str.endsWith("/") && !str.endsWith("\\")) { + str.append("/"); + } + str.append(entry->d_name); + + if (0 == stat(str.c_str(), &s)) { + if (getDir) { + if (s.st_mode & S_IFDIR) { + break; + } + } else { + if (!(s.st_mode & S_IFDIR) && issuffixfor(self.fSuffix, entry->d_name)) { + break; + } + } + } + } + if (entry) { // we broke out with a file + if (name) { + name->set(entry->d_name); + } + return true; + } + } + return false; +} diff --git a/gfx/skia/skia/src/ports/SkOSFile_stdio.cpp b/gfx/skia/skia/src/ports/SkOSFile_stdio.cpp new file mode 100644 index 0000000000..895802ec5a --- /dev/null +++ b/gfx/skia/skia/src/ports/SkOSFile_stdio.cpp @@ -0,0 +1,180 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "src/core/SkOSFile.h" + +#include +#include +#include + +#ifdef _WIN32 +#include +#include +#include +#include "src/base/SkUTF.h" +#endif + +#ifdef SK_BUILD_FOR_IOS +#include "src/ports/SkOSFile_ios.h" +#endif + +#ifdef _WIN32 +static bool is_ascii(const char* s) { + while (char v = *s++) { + if ((v & 0x80) != 0) { + return false; + } + } + return true; +} + +static FILE* fopen_win(const char* utf8path, const char* perm) { + if (is_ascii(utf8path)) { + return fopen(utf8path, perm); + } + + const char* ptr = utf8path; + const char* end = utf8path + strlen(utf8path); + size_t n = 0; + while (ptr < end) { + SkUnichar u = SkUTF::NextUTF8(&ptr, end); + if (u < 0) { + return nullptr; // malformed UTF-8 + } + n += SkUTF::ToUTF16(u); + } + std::vector wchars(n + 1); + uint16_t* out = wchars.data(); + ptr = utf8path; + while (ptr < end) { + out += SkUTF::ToUTF16(SkUTF::NextUTF8(&ptr, end), out); + } + SkASSERT(out == &wchars[n]); + *out = 0; // final null + wchar_t wperms[4] = {(wchar_t)perm[0], (wchar_t)perm[1], (wchar_t)perm[2], (wchar_t)perm[3]}; + return _wfopen((wchar_t*)wchars.data(), wperms); +} +#endif + +FILE* sk_fopen(const char path[], SkFILE_Flags flags) { + char perm[4] = {0, 0, 0, 0}; + char* p = perm; + + if (flags & kRead_SkFILE_Flag) { + *p++ = 'r'; + } + if (flags & kWrite_SkFILE_Flag) { + *p++ = 'w'; + } + *p = 'b'; + + FILE* file = nullptr; +#ifdef _WIN32 + file = fopen_win(path, perm); +#else + file = fopen(path, perm); +#endif +#ifdef SK_BUILD_FOR_IOS + // if not found in default path and read-only, try to open from bundle + if (!file && kRead_SkFILE_Flag == flags) { + SkString bundlePath; + if (ios_get_path_in_bundle(path, &bundlePath)) { + file = fopen(bundlePath.c_str(), perm); + } + } +#endif + + if (nullptr == file && (flags & kWrite_SkFILE_Flag)) { + SkDEBUGF("sk_fopen: fopen(\"%s\", \"%s\") returned nullptr (errno:%d): %s\n", + path, perm, errno, strerror(errno)); + } + return file; +} + +size_t sk_fgetsize(FILE* f) { + SkASSERT(f); + + long curr = ftell(f); // remember where we are + if (curr < 0) { + return 0; + } + + fseek(f, 0, SEEK_END); // go to the end + long size = ftell(f); // record the size + if (size < 0) { + size = 0; + } + + fseek(f, curr, SEEK_SET); // go back to our prev location + return size; +} + +size_t sk_fwrite(const void* buffer, size_t byteCount, FILE* f) { + SkASSERT(f); + return fwrite(buffer, 1, byteCount, f); +} + +void sk_fflush(FILE* f) { + SkASSERT(f); + fflush(f); +} + +size_t sk_ftell(FILE* f) { + long curr = ftell(f); + if (curr < 0) { + return 0; + } + return curr; +} + +void sk_fclose(FILE* f) { + if (f) { + fclose(f); + } +} + +bool sk_isdir(const char *path) { + struct stat status; + if (0 != stat(path, &status)) { +#ifdef SK_BUILD_FOR_IOS + // check the bundle directory if not in default path + SkString bundlePath; + if (ios_get_path_in_bundle(path, &bundlePath)) { + if (0 != stat(bundlePath.c_str(), &status)) { + return false; + } + } +#else + return false; +#endif + } + return SkToBool(status.st_mode & S_IFDIR); +} + +bool sk_mkdir(const char* path) { + if (sk_isdir(path)) { + return true; + } + if (sk_exists(path)) { + fprintf(stderr, + "sk_mkdir: path '%s' already exists but is not a directory\n", + path); + return false; + } + + int retval; +#ifdef _WIN32 + retval = _mkdir(path); +#else + retval = mkdir(path, 0777); + if (retval) { + perror("mkdir() failed with error: "); + } +#endif + return 0 == retval; +} diff --git a/gfx/skia/skia/src/ports/SkOSFile_win.cpp b/gfx/skia/skia/src/ports/SkOSFile_win.cpp new file mode 100644 index 0000000000..021ed06395 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkOSFile_win.cpp @@ -0,0 +1,286 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) + +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkNoncopyable.h" +#include "include/private/base/SkTFitsIn.h" +#include "src/base/SkLeanWindows.h" +#include "src/core/SkOSFile.h" +#include "src/core/SkStringUtils.h" + +#include +#include +#include +#include + +void sk_fsync(FILE* f) { + _commit(sk_fileno(f)); +} + +bool sk_exists(const char *path, SkFILE_Flags flags) { + int mode = 0; // existence + if (flags & kRead_SkFILE_Flag) { + mode |= 4; // read + } + if (flags & kWrite_SkFILE_Flag) { + mode |= 2; // write + } + return (0 == _access(path, mode)); +} + +typedef struct { + ULONGLONG fVolume; + ULONGLONG fLsbSize; + ULONGLONG fMsbSize; +} SkFILEID; + +static bool sk_ino(FILE* f, SkFILEID* id) { + int fileno = _fileno((FILE*)f); + if (fileno < 0) { + return false; + } + + HANDLE file = (HANDLE)_get_osfhandle(fileno); + if (INVALID_HANDLE_VALUE == file) { + return false; + } + + //TODO: call GetFileInformationByHandleEx on Vista and later with FileIdInfo. + BY_HANDLE_FILE_INFORMATION info; + if (0 == GetFileInformationByHandle(file, &info)) { + return false; + } + id->fVolume = info.dwVolumeSerialNumber; + id->fLsbSize = info.nFileIndexLow + (((ULONGLONG)info.nFileIndexHigh) << 32); + id->fMsbSize = 0; + + return true; +} + +bool sk_fidentical(FILE* a, FILE* b) { + SkFILEID aID, bID; + return sk_ino(a, &aID) && sk_ino(b, &bID) + && aID.fLsbSize == bID.fLsbSize + && aID.fMsbSize == bID.fMsbSize + && aID.fVolume == bID.fVolume; +} + +class SkAutoNullKernelHandle : SkNoncopyable { +public: + SkAutoNullKernelHandle(const HANDLE handle) : fHandle(handle) { } + ~SkAutoNullKernelHandle() { CloseHandle(fHandle); } + operator HANDLE() const { return fHandle; } + bool isValid() const { return SkToBool(fHandle); } +private: + HANDLE fHandle; +}; +typedef SkAutoNullKernelHandle SkAutoWinMMap; + +void sk_fmunmap(const void* addr, size_t) { + UnmapViewOfFile(addr); +} + +void* sk_fdmmap(int fileno, size_t* length) { + HANDLE file = (HANDLE)_get_osfhandle(fileno); + if (INVALID_HANDLE_VALUE == file) { + return nullptr; + } + + LARGE_INTEGER fileSize; + if (0 == GetFileSizeEx(file, &fileSize)) { + //TODO: use SK_TRACEHR(GetLastError(), "Could not get file size.") to report. + return nullptr; + } + if (!SkTFitsIn(fileSize.QuadPart)) { + return nullptr; + } + + SkAutoWinMMap mmap(CreateFileMapping(file, nullptr, PAGE_READONLY, 0, 0, nullptr)); + if (!mmap.isValid()) { + //TODO: use SK_TRACEHR(GetLastError(), "Could not create file mapping.") to report. + return nullptr; + } + + // Eventually call UnmapViewOfFile + void* addr = MapViewOfFile(mmap, FILE_MAP_READ, 0, 0, 0); + if (nullptr == addr) { + //TODO: use SK_TRACEHR(GetLastError(), "Could not map view of file.") to report. + return nullptr; + } + + *length = static_cast(fileSize.QuadPart); + return addr; +} + +int sk_fileno(FILE* f) { + return _fileno((FILE*)f); +} + +void* sk_fmmap(FILE* f, size_t* length) { + int fileno = sk_fileno(f); + if (fileno < 0) { + return nullptr; + } + + return sk_fdmmap(fileno, length); +} + +size_t sk_qread(FILE* file, void* buffer, size_t count, size_t offset) { + int fileno = sk_fileno(file); + HANDLE fileHandle = (HANDLE)_get_osfhandle(fileno); + if (INVALID_HANDLE_VALUE == file) { + return SIZE_MAX; + } + + OVERLAPPED overlapped; + memset(&overlapped, 0, sizeof(overlapped)); + ULARGE_INTEGER winOffset; + winOffset.QuadPart = offset; + overlapped.Offset = winOffset.LowPart; + overlapped.OffsetHigh = winOffset.HighPart; + + if (!SkTFitsIn(count)) { + count = std::numeric_limits::max(); + } + + DWORD bytesRead; + if (ReadFile(fileHandle, buffer, static_cast(count), &bytesRead, &overlapped)) { + return bytesRead; + } + if (GetLastError() == ERROR_HANDLE_EOF) { + return 0; + } + return SIZE_MAX; +} + +//////////////////////////////////////////////////////////////////////////// + +struct SkOSFileIterData { + SkOSFileIterData() : fHandle(0), fPath16(nullptr) { } + HANDLE fHandle; + uint16_t* fPath16; +}; +static_assert(sizeof(SkOSFileIterData) <= SkOSFile::Iter::kStorageSize, "not_enough_space"); + +static uint16_t* concat_to_16(const char src[], const char suffix[]) { + size_t i, len = strlen(src); + size_t len2 = 3 + (suffix ? strlen(suffix) : 0); + uint16_t* dst = (uint16_t*)sk_malloc_throw((len + len2) * sizeof(uint16_t)); + + for (i = 0; i < len; i++) { + dst[i] = src[i]; + } + + if (i > 0 && dst[i-1] != '/') { + dst[i++] = '/'; + } + dst[i++] = '*'; + + if (suffix) { + while (*suffix) { + dst[i++] = *suffix++; + } + } + dst[i] = 0; + SkASSERT(i + 1 <= len + len2); + + return dst; +} + +SkOSFile::Iter::Iter() { new (fSelf) SkOSFileIterData; } + +SkOSFile::Iter::Iter(const char path[], const char suffix[]) { + new (fSelf) SkOSFileIterData; + this->reset(path, suffix); +} + +SkOSFile::Iter::~Iter() { + SkOSFileIterData& self = *reinterpret_cast(fSelf); + sk_free(self.fPath16); + if (self.fHandle) { + ::FindClose(self.fHandle); + } + self.~SkOSFileIterData(); +} + +void SkOSFile::Iter::reset(const char path[], const char suffix[]) { + SkOSFileIterData& self = *reinterpret_cast(fSelf); + if (self.fHandle) { + ::FindClose(self.fHandle); + self.fHandle = 0; + } + if (nullptr == path) { + path = ""; + } + + sk_free(self.fPath16); + self.fPath16 = concat_to_16(path, suffix); +} + +static bool is_magic_dir(const uint16_t dir[]) { + // return true for "." and ".." + return dir[0] == '.' && (dir[1] == 0 || (dir[1] == '.' && dir[2] == 0)); +} + +static bool get_the_file(HANDLE handle, SkString* name, WIN32_FIND_DATAW* dataPtr, bool getDir) { + WIN32_FIND_DATAW data; + + if (nullptr == dataPtr) { + if (::FindNextFileW(handle, &data)) + dataPtr = &data; + else + return false; + } + + for (;;) { + if (getDir) { + if ((dataPtr->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) && + !is_magic_dir((uint16_t*)dataPtr->cFileName)) + { + break; + } + } else { + if (!(dataPtr->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) { + break; + } + } + if (!::FindNextFileW(handle, dataPtr)) { + return false; + } + } + // if we get here, we've found a file/dir + if (name) { + const uint16_t* utf16name = (const uint16_t*)dataPtr->cFileName; + const uint16_t* ptr = utf16name; + while (*ptr != 0) { ++ptr; } + *name = SkStringFromUTF16(utf16name, ptr - utf16name); + } + return true; +} + +bool SkOSFile::Iter::next(SkString* name, bool getDir) { + SkOSFileIterData& self = *reinterpret_cast(fSelf); + WIN32_FIND_DATAW data; + WIN32_FIND_DATAW* dataPtr = nullptr; + + if (self.fHandle == 0) { // our first time + if (self.fPath16 == nullptr || *self.fPath16 == 0) { // check for no path + return false; + } + + self.fHandle = ::FindFirstFileW((LPCWSTR)self.fPath16, &data); + if (self.fHandle != 0 && self.fHandle != (HANDLE)~0) { + dataPtr = &data; + } + } + return self.fHandle != (HANDLE)~0 && get_the_file(self.fHandle, name, dataPtr, getDir); +} + +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkOSLibrary.h b/gfx/skia/skia/src/ports/SkOSLibrary.h new file mode 100644 index 0000000000..d7f696f09b --- /dev/null +++ b/gfx/skia/skia/src/ports/SkOSLibrary.h @@ -0,0 +1,15 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOSLibrary_DEFINED +#define SkOSLibrary_DEFINED + +void* SkLoadDynamicLibrary(const char* libraryName); +void* SkGetProcedureAddress(void* library, const char* functionName); +bool SkFreeDynamicLibrary(void* library); + +#endif diff --git a/gfx/skia/skia/src/ports/SkOSLibrary_posix.cpp b/gfx/skia/skia/src/ports/SkOSLibrary_posix.cpp new file mode 100644 index 0000000000..0bb020064f --- /dev/null +++ b/gfx/skia/skia/src/ports/SkOSLibrary_posix.cpp @@ -0,0 +1,26 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkTypes.h" +#if !defined(SK_BUILD_FOR_WIN) + +#include "src/ports/SkOSLibrary.h" + +#include + +void* SkLoadDynamicLibrary(const char* libraryName) { + return dlopen(libraryName, RTLD_LAZY); +} + +void* SkGetProcedureAddress(void* library, const char* functionName) { + return dlsym(library, functionName); +} + +bool SkFreeDynamicLibrary(void* library) { + return dlclose(library) == 0; +} + +#endif//!defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkOSLibrary_win.cpp b/gfx/skia/skia/src/ports/SkOSLibrary_win.cpp new file mode 100644 index 0000000000..b5fdec4c6d --- /dev/null +++ b/gfx/skia/skia/src/ports/SkOSLibrary_win.cpp @@ -0,0 +1,25 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) + +#include "src/base/SkLeanWindows.h" +#include "src/ports/SkOSLibrary.h" + +void* SkLoadDynamicLibrary(const char* libraryName) { + return LoadLibraryA(libraryName); +} + +void* SkGetProcedureAddress(void* library, const char* functionName) { + return reinterpret_cast(::GetProcAddress((HMODULE)library, functionName)); +} + +bool SkFreeDynamicLibrary(void* library) { + return FreeLibrary((HMODULE)library); +} + +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkRemotableFontMgr_win_dw.cpp b/gfx/skia/skia/src/ports/SkRemotableFontMgr_win_dw.cpp new file mode 100644 index 0000000000..2c2d8520f4 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkRemotableFontMgr_win_dw.cpp @@ -0,0 +1,472 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/utils/win/SkDWriteNTDDI_VERSION.h" + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) + +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "include/ports/SkRemotableFontMgr.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTArray.h" +#include "src/base/SkUTF.h" +#include "src/ports/SkTypeface_win_dw.h" +#include "src/utils/win/SkDWrite.h" +#include "src/utils/win/SkDWriteFontFileStream.h" +#include "src/utils/win/SkHRESULT.h" +#include "src/utils/win/SkObjBase.h" +#include "src/utils/win/SkTScopedComPtr.h" + +#include + +class SK_API SkRemotableFontMgr_DirectWrite : public SkRemotableFontMgr { +private: + struct DataId { + IUnknown* fLoader; // In COM only IUnknown pointers may be safely used for identity. + void* fKey; + UINT32 fKeySize; + + DataId() { } + + DataId(DataId&& that) : fLoader(that.fLoader), fKey(that.fKey), fKeySize(that.fKeySize) { + that.fLoader = nullptr; + that.fKey = nullptr; + SkDEBUGCODE(that.fKeySize = 0xFFFFFFFF;) + } + + ~DataId() { + if (fLoader) { + fLoader->Release(); + } + sk_free(fKey); + } + }; + + mutable SkTArray fDataIdCache; + mutable SkMutex fDataIdCacheMutex; + + int FindOrAdd(IDWriteFontFileLoader* fontFileLoader, + const void* refKey, UINT32 refKeySize) const + { + SkTScopedComPtr fontFileLoaderId; + HR_GENERAL(fontFileLoader->QueryInterface(&fontFileLoaderId), + "Failed to re-convert to IDWriteFontFileLoader.", + SkFontIdentity::kInvalidDataId); + + SkAutoMutexExclusive ama(fDataIdCacheMutex); + int count = fDataIdCache.size(); + int i; + for (i = 0; i < count; ++i) { + const DataId& current = fDataIdCache[i]; + if (fontFileLoaderId.get() == current.fLoader && + refKeySize == current.fKeySize && + 0 == memcmp(refKey, current.fKey, refKeySize)) + { + return i; + } + } + DataId& added = fDataIdCache.push_back(); + added.fLoader = fontFileLoaderId.release(); // Ref is passed. + added.fKey = sk_malloc_throw(refKeySize); + memcpy(added.fKey, refKey, refKeySize); + added.fKeySize = refKeySize; + + return i; + } + +public: + + + /** localeNameLength must include the null terminator. */ + SkRemotableFontMgr_DirectWrite(IDWriteFontCollection* fontCollection, + WCHAR* localeName, int localeNameLength) + : fFontCollection(SkRefComPtr(fontCollection)) + , fLocaleName(localeNameLength) + { + memcpy(fLocaleName.get(), localeName, localeNameLength * sizeof(WCHAR)); + } + + HRESULT FontToIdentity(IDWriteFont* font, SkFontIdentity* fontId) const { + SkTScopedComPtr fontFace; + HRM(font->CreateFontFace(&fontFace), "Could not create font face."); + + UINT32 numFiles; + HR(fontFace->GetFiles(&numFiles, nullptr)); + if (numFiles > 1) { + return E_FAIL; + } + + // data id + SkTScopedComPtr fontFile; + HR(fontFace->GetFiles(&numFiles, &fontFile)); + + SkTScopedComPtr fontFileLoader; + HR(fontFile->GetLoader(&fontFileLoader)); + + const void* refKey; + UINT32 refKeySize; + HR(fontFile->GetReferenceKey(&refKey, &refKeySize)); + + fontId->fDataId = FindOrAdd(fontFileLoader.get(), refKey, refKeySize); + + // index + fontId->fTtcIndex = fontFace->GetIndex(); + + // style + fontId->fFontStyle = get_style(font); + return S_OK; + } + + SkRemotableFontIdentitySet* getIndex(int familyIndex) const override { + SkTScopedComPtr fontFamily; + HRNM(fFontCollection->GetFontFamily(familyIndex, &fontFamily), + "Could not get requested family."); + + int count = fontFamily->GetFontCount(); + SkFontIdentity* fontIds; + sk_sp fontIdSet( + new SkRemotableFontIdentitySet(count, &fontIds)); + for (int fontIndex = 0; fontIndex < count; ++fontIndex) { + SkTScopedComPtr font; + HRNM(fontFamily->GetFont(fontIndex, &font), "Could not get font."); + + HRN(FontToIdentity(font.get(), &fontIds[fontIndex])); + } + return fontIdSet.release(); + } + + virtual SkFontIdentity matchIndexStyle(int familyIndex, + const SkFontStyle& pattern) const override + { + SkFontIdentity identity = { SkFontIdentity::kInvalidDataId }; + + SkTScopedComPtr fontFamily; + HR_GENERAL(fFontCollection->GetFontFamily(familyIndex, &fontFamily), + "Could not get requested family.", + identity); + + const DWriteStyle dwStyle(pattern); + SkTScopedComPtr font; + HR_GENERAL(fontFamily->GetFirstMatchingFont(dwStyle.fWeight, dwStyle.fWidth, + dwStyle.fSlant, &font), + "Could not match font in family.", + identity); + + HR_GENERAL(FontToIdentity(font.get(), &identity), nullptr, identity); + + return identity; + } + + static HRESULT getDefaultFontFamilyName(SkSMallocWCHAR* name) { + NONCLIENTMETRICSW metrics; + metrics.cbSize = sizeof(metrics); + if (0 == SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, + sizeof(metrics), + &metrics, + 0)) { + return E_UNEXPECTED; + } + + size_t len = wcsnlen_s(metrics.lfMessageFont.lfFaceName, LF_FACESIZE) + 1; + if (0 != wcsncpy_s(name->reset(len), len, metrics.lfMessageFont.lfFaceName, _TRUNCATE)) { + return E_UNEXPECTED; + } + + return S_OK; + } + + SkRemotableFontIdentitySet* matchName(const char familyName[]) const override { + SkSMallocWCHAR dwFamilyName; + if (nullptr == familyName) { + HR_GENERAL(getDefaultFontFamilyName(&dwFamilyName), + nullptr, SkRemotableFontIdentitySet::NewEmpty()); + } else { + HR_GENERAL(sk_cstring_to_wchar(familyName, &dwFamilyName), + nullptr, SkRemotableFontIdentitySet::NewEmpty()); + } + + UINT32 index; + BOOL exists; + HR_GENERAL(fFontCollection->FindFamilyName(dwFamilyName.get(), &index, &exists), + "Failed while finding family by name.", + SkRemotableFontIdentitySet::NewEmpty()); + if (!exists) { + return SkRemotableFontIdentitySet::NewEmpty(); + } + + return this->getIndex(index); + } + + virtual SkFontIdentity matchNameStyle(const char familyName[], + const SkFontStyle& style) const override + { + SkFontIdentity identity = { SkFontIdentity::kInvalidDataId }; + + SkSMallocWCHAR dwFamilyName; + if (nullptr == familyName) { + HR_GENERAL(getDefaultFontFamilyName(&dwFamilyName), nullptr, identity); + } else { + HR_GENERAL(sk_cstring_to_wchar(familyName, &dwFamilyName), nullptr, identity); + } + + UINT32 index; + BOOL exists; + HR_GENERAL(fFontCollection->FindFamilyName(dwFamilyName.get(), &index, &exists), + "Failed while finding family by name.", + identity); + if (!exists) { + return identity; + } + + return this->matchIndexStyle(index, style); + } + + class FontFallbackRenderer : public IDWriteTextRenderer { + public: + FontFallbackRenderer(const SkRemotableFontMgr_DirectWrite* outer, UINT32 character) + : fRefCount(1), fOuter(SkSafeRef(outer)), fCharacter(character) { + fIdentity.fDataId = SkFontIdentity::kInvalidDataId; + } + + virtual ~FontFallbackRenderer() { } + + // IDWriteTextRenderer methods + SK_STDMETHODIMP DrawGlyphRun( + void* clientDrawingContext, + FLOAT baselineOriginX, + FLOAT baselineOriginY, + DWRITE_MEASURING_MODE measuringMode, + DWRITE_GLYPH_RUN const* glyphRun, + DWRITE_GLYPH_RUN_DESCRIPTION const* glyphRunDescription, + IUnknown* clientDrawingEffect) override + { + SkTScopedComPtr font; + HRM(fOuter->fFontCollection->GetFontFromFontFace(glyphRun->fontFace, &font), + "Could not get font from font face."); + + // It is possible that the font passed does not actually have the requested character, + // due to no font being found and getting the fallback font. + // Check that the font actually contains the requested character. + BOOL exists; + HRM(font->HasCharacter(fCharacter, &exists), "Could not find character."); + + if (exists) { + HR(fOuter->FontToIdentity(font.get(), &fIdentity)); + } + + return S_OK; + } + + SK_STDMETHODIMP DrawUnderline( + void* clientDrawingContext, + FLOAT baselineOriginX, + FLOAT baselineOriginY, + DWRITE_UNDERLINE const* underline, + IUnknown* clientDrawingEffect) override + { return E_NOTIMPL; } + + SK_STDMETHODIMP DrawStrikethrough( + void* clientDrawingContext, + FLOAT baselineOriginX, + FLOAT baselineOriginY, + DWRITE_STRIKETHROUGH const* strikethrough, + IUnknown* clientDrawingEffect) override + { return E_NOTIMPL; } + + SK_STDMETHODIMP DrawInlineObject( + void* clientDrawingContext, + FLOAT originX, + FLOAT originY, + IDWriteInlineObject* inlineObject, + BOOL isSideways, + BOOL isRightToLeft, + IUnknown* clientDrawingEffect) override + { return E_NOTIMPL; } + + // IDWritePixelSnapping methods + SK_STDMETHODIMP IsPixelSnappingDisabled( + void* clientDrawingContext, + BOOL* isDisabled) override + { + *isDisabled = FALSE; + return S_OK; + } + + SK_STDMETHODIMP GetCurrentTransform( + void* clientDrawingContext, + DWRITE_MATRIX* transform) override + { + const DWRITE_MATRIX ident = {1.0, 0.0, 0.0, 1.0, 0.0, 0.0}; + *transform = ident; + return S_OK; + } + + SK_STDMETHODIMP GetPixelsPerDip( + void* clientDrawingContext, + FLOAT* pixelsPerDip) override + { + *pixelsPerDip = 1.0f; + return S_OK; + } + + // IUnknown methods + SK_STDMETHODIMP_(ULONG) AddRef() override { + return InterlockedIncrement(&fRefCount); + } + + SK_STDMETHODIMP_(ULONG) Release() override { + ULONG newCount = InterlockedDecrement(&fRefCount); + if (0 == newCount) { + delete this; + } + return newCount; + } + + SK_STDMETHODIMP QueryInterface( + IID const& riid, void** ppvObject) override + { + if (__uuidof(IUnknown) == riid || + __uuidof(IDWritePixelSnapping) == riid || + __uuidof(IDWriteTextRenderer) == riid) + { + *ppvObject = this; + this->AddRef(); + return S_OK; + } + *ppvObject = nullptr; + return E_FAIL; + } + + const SkFontIdentity FallbackIdentity() { return fIdentity; } + + protected: + ULONG fRefCount; + sk_sp fOuter; + UINT32 fCharacter; + SkFontIdentity fIdentity; + }; + + virtual SkFontIdentity matchNameStyleCharacter(const char familyName[], + const SkFontStyle& pattern, + const char* bcp47[], int bcp47Count, + SkUnichar character) const override + { + SkFontIdentity identity = { SkFontIdentity::kInvalidDataId }; + + IDWriteFactory* dwFactory = sk_get_dwrite_factory(); + if (nullptr == dwFactory) { + return identity; + } + + // TODO: use IDWriteFactory2::GetSystemFontFallback when available. + + const DWriteStyle dwStyle(pattern); + + SkSMallocWCHAR dwFamilyName; + if (nullptr == familyName) { + HR_GENERAL(getDefaultFontFamilyName(&dwFamilyName), nullptr, identity); + } else { + HR_GENERAL(sk_cstring_to_wchar(familyName, &dwFamilyName), nullptr, identity); + } + + const SkSMallocWCHAR* dwBcp47; + SkSMallocWCHAR dwBcp47Local; + if (bcp47Count < 1) { + dwBcp47 = &fLocaleName; + } else { + //TODO: support fallback stack. + HR_GENERAL(sk_cstring_to_wchar(bcp47[bcp47Count-1], &dwBcp47Local), nullptr, identity); + dwBcp47 = &dwBcp47Local; + } + + SkTScopedComPtr fallbackFormat; + HR_GENERAL(dwFactory->CreateTextFormat(dwFamilyName, + fFontCollection.get(), + dwStyle.fWeight, + dwStyle.fSlant, + dwStyle.fWidth, + 72.0f, + *dwBcp47, + &fallbackFormat), + "Could not create text format.", + identity); + + WCHAR str[16]; + UINT32 strLen = static_cast( + SkUTF::ToUTF16(character, reinterpret_cast(str))); + SkTScopedComPtr fallbackLayout; + HR_GENERAL(dwFactory->CreateTextLayout(str, strLen, fallbackFormat.get(), + 200.0f, 200.0f, + &fallbackLayout), + "Could not create text layout.", + identity); + + SkTScopedComPtr fontFallbackRenderer( + new FontFallbackRenderer(this, character)); + + HR_GENERAL(fallbackLayout->Draw(nullptr, fontFallbackRenderer.get(), 50.0f, 50.0f), + "Could not draw layout with renderer.", + identity); + + return fontFallbackRenderer->FallbackIdentity(); + } + + SkStreamAsset* getData(int dataId) const override { + SkAutoMutexExclusive ama(fDataIdCacheMutex); + if (dataId >= fDataIdCache.size()) { + return nullptr; + } + const DataId& id = fDataIdCache[dataId]; + + SkTScopedComPtr loader; + HRNM(id.fLoader->QueryInterface(&loader), "QuerryInterface IDWriteFontFileLoader failed"); + + SkTScopedComPtr fontFileStream; + HRNM(loader->CreateStreamFromKey(id.fKey, id.fKeySize, &fontFileStream), + "Could not create font file stream."); + + return new SkDWriteFontFileStream(fontFileStream.get()); + } + +private: + SkTScopedComPtr fFontCollection; + SkSMallocWCHAR fLocaleName; + + using INHERITED = SkRemotableFontMgr; +}; + +SkRemotableFontMgr* SkRemotableFontMgr_New_DirectWrite() { + IDWriteFactory* factory = sk_get_dwrite_factory(); + if (nullptr == factory) { + return nullptr; + } + + SkTScopedComPtr sysFontCollection; + HRNM(factory->GetSystemFontCollection(&sysFontCollection, FALSE), + "Could not get system font collection."); + + WCHAR localeNameStorage[LOCALE_NAME_MAX_LENGTH]; + WCHAR* localeName = nullptr; + int localeNameLen = 0; + + // Dynamically load GetUserDefaultLocaleName function, as it is not available on XP. + SkGetUserDefaultLocaleNameProc getUserDefaultLocaleNameProc = nullptr; + HRESULT hr = SkGetGetUserDefaultLocaleNameProc(&getUserDefaultLocaleNameProc); + if (nullptr == getUserDefaultLocaleNameProc) { + SK_TRACEHR(hr, "Could not get GetUserDefaultLocaleName."); + } else { + localeNameLen = getUserDefaultLocaleNameProc(localeNameStorage, LOCALE_NAME_MAX_LENGTH); + if (localeNameLen) { + localeName = localeNameStorage; + }; + } + + return new SkRemotableFontMgr_DirectWrite(sysFontCollection.get(), localeName, localeNameLen); +} +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkScalerContext_mac_ct.cpp b/gfx/skia/skia/src/ports/SkScalerContext_mac_ct.cpp new file mode 100644 index 0000000000..1e61bbd775 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkScalerContext_mac_ct.cpp @@ -0,0 +1,789 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#ifdef SK_BUILD_FOR_MAC +#import +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#include +#include +#include +#endif + +#include "include/core/SkColor.h" +#include "include/core/SkColorPriv.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkFontTypes.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPathBuilder.h" +#include "include/core/SkPoint.h" +#include "include/core/SkRect.h" +#include "include/core/SkScalar.h" +#include "include/core/SkTypeface.h" +#include "include/private/SkColorData.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkAutoMalloc.h" +#include "src/base/SkEndian.h" +#include "src/base/SkMathPriv.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkMask.h" +#include "src/core/SkMaskGamma.h" +#include "src/core/SkOpts.h" +#include "src/ports/SkScalerContext_mac_ct.h" +#include "src/ports/SkTypeface_mac_ct.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_OS_2.h" +#include "src/utils/mac/SkCGBase.h" +#include "src/utils/mac/SkCGGeometry.h" +#include "src/utils/mac/SkCTFont.h" +#include "src/utils/mac/SkUniqueCFRef.h" + +#include + +class SkDescriptor; + + +namespace { +static inline const constexpr bool kSkShowTextBlitCoverage = false; +} + +static void sk_memset_rect32(uint32_t* ptr, uint32_t value, + int width, int height, size_t rowBytes) { + SkASSERT(width); + SkASSERT(width * sizeof(uint32_t) <= rowBytes); + + if (width >= 32) { + while (height) { + SkOpts::memset32(ptr, value, width); + ptr = (uint32_t*)((char*)ptr + rowBytes); + height -= 1; + } + return; + } + + rowBytes -= width * sizeof(uint32_t); + + if (width >= 8) { + while (height) { + int w = width; + do { + *ptr++ = value; *ptr++ = value; + *ptr++ = value; *ptr++ = value; + *ptr++ = value; *ptr++ = value; + *ptr++ = value; *ptr++ = value; + w -= 8; + } while (w >= 8); + while (--w >= 0) { + *ptr++ = value; + } + ptr = (uint32_t*)((char*)ptr + rowBytes); + height -= 1; + } + } else { + while (height) { + int w = width; + do { + *ptr++ = value; + } while (--w > 0); + ptr = (uint32_t*)((char*)ptr + rowBytes); + height -= 1; + } + } +} + +static unsigned CGRGBPixel_getAlpha(CGRGBPixel pixel) { + return pixel & 0xFF; +} + +static CGAffineTransform MatrixToCGAffineTransform(const SkMatrix& matrix) { + return CGAffineTransformMake( SkScalarToCGFloat(matrix[SkMatrix::kMScaleX]), + -SkScalarToCGFloat(matrix[SkMatrix::kMSkewY] ), + -SkScalarToCGFloat(matrix[SkMatrix::kMSkewX] ), + SkScalarToCGFloat(matrix[SkMatrix::kMScaleY]), + SkScalarToCGFloat(matrix[SkMatrix::kMTransX]), + SkScalarToCGFloat(matrix[SkMatrix::kMTransY])); +} + +SkScalerContext_Mac::SkScalerContext_Mac(sk_sp typeface, + const SkScalerContextEffects& effects, + const SkDescriptor* desc) + : INHERITED(std::move(typeface), effects, desc) + , fOffscreen(fRec.fForegroundColor) + , fDoSubPosition(SkToBool(fRec.fFlags & kSubpixelPositioning_Flag)) + +{ + CTFontRef ctFont = (CTFontRef)this->getTypeface()->internal_private_getCTFontRef(); + + // CT on (at least) 10.9 will size color glyphs down from the requested size, but not up. + // As a result, it is necessary to know the actual device size and request that. + SkVector scale; + SkMatrix skTransform; + bool invertible = fRec.computeMatrices(SkScalerContextRec::PreMatrixScale::kVertical, + &scale, &skTransform, nullptr, nullptr, nullptr); + fTransform = MatrixToCGAffineTransform(skTransform); + // CGAffineTransformInvert documents that if the transform is non-invertible it will return the + // passed transform unchanged. It does so, but then also prints a message to stdout. Avoid this. + if (invertible) { + fInvTransform = CGAffineTransformInvert(fTransform); + } else { + fInvTransform = fTransform; + } + + // The transform contains everything except the requested text size. + // Some properties, like 'trak', are based on the optical text size. + CGFloat textSize = SkScalarToCGFloat(scale.y()); + fCTFont = SkCTFontCreateExactCopy(ctFont, textSize, + ((SkTypeface_Mac*)this->getTypeface())->fOpszVariation); + fCGFont.reset(CTFontCopyGraphicsFont(fCTFont.get(), nullptr)); +} + +static int RoundSize(int dimension) { + return SkNextPow2(dimension); +} + +static CGColorRef CGColorForSkColor(CGColorSpaceRef rgbcs, SkColor bgra) { + CGFloat components[4]; + components[0] = (CGFloat)SkColorGetR(bgra) * (1/255.0f); + components[1] = (CGFloat)SkColorGetG(bgra) * (1/255.0f); + components[2] = (CGFloat)SkColorGetB(bgra) * (1/255.0f); + // CoreText applies the CGContext fill color as the COLR foreground color. + // However, the alpha is applied to the whole glyph drawing (and Skia will do that as well). + // For now, cannot really support COLR foreground color alpha. + components[3] = 1.0f; + return CGColorCreate(rgbcs, components); +} + +SkScalerContext_Mac::Offscreen::Offscreen(SkColor foregroundColor) + : fCG(nullptr) + , fSKForegroundColor(foregroundColor) + , fDoAA(false) + , fDoLCD(false) +{ + fSize.set(0, 0); +} + +CGRGBPixel* SkScalerContext_Mac::Offscreen::getCG(const SkScalerContext_Mac& context, + const SkGlyph& glyph, CGGlyph glyphID, + size_t* rowBytesPtr, + bool generateA8FromLCD, + bool lightOnDark) { + if (!fRGBSpace) { + //It doesn't appear to matter what color space is specified. + //Regular blends and antialiased text are always (s*a + d*(1-a)) + //and subpixel antialiased text is always g=2.0. + fRGBSpace.reset(CGColorSpaceCreateDeviceRGB()); + fCGForegroundColor.reset(CGColorForSkColor(fRGBSpace.get(), fSKForegroundColor)); + } + + // default to kBW_Format + bool doAA = false; + bool doLCD = false; + + if (SkMask::kBW_Format != glyph.maskFormat()) { + doLCD = true; + doAA = true; + } + + // FIXME: lcd smoothed un-hinted rasterization unsupported. + if (!generateA8FromLCD && SkMask::kA8_Format == glyph.maskFormat()) { + doLCD = false; + doAA = true; + } + + // If this font might have color glyphs, disable LCD as there's no way to support it. + // CoreText doesn't tell us which format it ended up using, so we can't detect it. + // A8 will end up black on transparent, but TODO: we can detect gray and set to A8. + if (SkMask::kARGB32_Format == glyph.maskFormat()) { + doLCD = false; + } + + size_t rowBytes = fSize.fWidth * sizeof(CGRGBPixel); + if (!fCG || fSize.fWidth < glyph.width() || fSize.fHeight < glyph.height()) { + if (fSize.fWidth < glyph.width()) { + fSize.fWidth = RoundSize(glyph.width()); + } + if (fSize.fHeight < glyph.height()) { + fSize.fHeight = RoundSize(glyph.height()); + } + + rowBytes = fSize.fWidth * sizeof(CGRGBPixel); + void* image = fImageStorage.reset(rowBytes * fSize.fHeight); + const CGImageAlphaInfo alpha = (glyph.isColor()) + ? kCGImageAlphaPremultipliedFirst + : kCGImageAlphaNoneSkipFirst; + const CGBitmapInfo bitmapInfo = kCGBitmapByteOrder32Host | (CGBitmapInfo)alpha; + fCG.reset(CGBitmapContextCreate(image, fSize.fWidth, fSize.fHeight, 8, + rowBytes, fRGBSpace.get(), bitmapInfo)); + + // Skia handles quantization and subpixel positioning, + // so disable quantization and enable subpixel positioning in CG. + CGContextSetAllowsFontSubpixelQuantization(fCG.get(), false); + CGContextSetShouldSubpixelQuantizeFonts(fCG.get(), false); + + // Because CG always draws from the horizontal baseline, + // if there is a non-integral translation from the horizontal origin to the vertical origin, + // then CG cannot draw the glyph in the correct location without subpixel positioning. + CGContextSetAllowsFontSubpixelPositioning(fCG.get(), true); + CGContextSetShouldSubpixelPositionFonts(fCG.get(), true); + + CGContextSetTextDrawingMode(fCG.get(), kCGTextFill); + + if (SkMask::kARGB32_Format != glyph.maskFormat()) { + // Draw black on white to create mask. (Special path exists to speed this up in CG.) + // If light-on-dark is requested, draw white on black. + CGContextSetGrayFillColor(fCG.get(), lightOnDark ? 1.0f : 0.0f, 1.0f); + } else { + CGContextSetFillColorWithColor(fCG.get(), fCGForegroundColor.get()); + } + + // force our checks below to happen + fDoAA = !doAA; + fDoLCD = !doLCD; + + CGContextSetTextMatrix(fCG.get(), context.fTransform); + } + + if (fDoAA != doAA) { + CGContextSetShouldAntialias(fCG.get(), doAA); + fDoAA = doAA; + } + if (fDoLCD != doLCD) { + CGContextSetShouldSmoothFonts(fCG.get(), doLCD); + fDoLCD = doLCD; + } + + CGRGBPixel* image = (CGRGBPixel*)fImageStorage.get(); + // skip rows based on the glyph's height + image += (fSize.fHeight - glyph.height()) * fSize.fWidth; + + // Erase to white (or transparent black if it's a color glyph, to not composite against white). + // For light-on-dark, instead erase to black. + uint32_t bgColor = (!glyph.isColor()) ? (lightOnDark ? 0xFF000000 : 0xFFFFFFFF) : 0x00000000; + sk_memset_rect32(image, bgColor, glyph.width(), glyph.height(), rowBytes); + + float subX = 0; + float subY = 0; + if (context.fDoSubPosition) { + subX = SkFixedToFloat(glyph.getSubXFixed()); + subY = SkFixedToFloat(glyph.getSubYFixed()); + } + + CGPoint point = CGPointMake(-glyph.left() + subX, glyph.top() + glyph.height() - subY); + // Prior to 10.10, CTFontDrawGlyphs acted like CGContextShowGlyphsAtPositions and took + // 'positions' which are in text space. The glyph location (in device space) must be + // mapped into text space, so that CG can convert it back into device space. + // In 10.10.1, this is handled directly in CTFontDrawGlyphs. + // + // However, in 10.10.2 color glyphs no longer rotate based on the font transform. + // So always make the font transform identity and place the transform on the context. + point = CGPointApplyAffineTransform(point, context.fInvTransform); + + CTFontDrawGlyphs(context.fCTFont.get(), &glyphID, &point, 1, fCG.get()); + + SkASSERT(rowBytesPtr); + *rowBytesPtr = rowBytes; + return image; +} + +bool SkScalerContext_Mac::generateAdvance(SkGlyph* glyph) { + return false; +} + +void SkScalerContext_Mac::generateMetrics(SkGlyph* glyph, SkArenaAlloc* alloc) { + glyph->fMaskFormat = fRec.fMaskFormat; + +#ifndef MOZ_SKIA + if (((SkTypeface_Mac*)this->getTypeface())->fHasColorGlyphs) { + glyph->setPath(alloc, nullptr, false); + } +#endif + + const CGGlyph cgGlyph = (CGGlyph) glyph->getGlyphID(); + glyph->zeroMetrics(); + + // The following block produces cgAdvance in CG units (pixels, y up). + CGSize cgAdvance; + CTFontGetAdvancesForGlyphs(fCTFont.get(), kCTFontOrientationHorizontal, + &cgGlyph, &cgAdvance, 1); + cgAdvance = CGSizeApplyAffineTransform(cgAdvance, fTransform); + glyph->fAdvanceX = SkFloatFromCGFloat(cgAdvance.width); + glyph->fAdvanceY = -SkFloatFromCGFloat(cgAdvance.height); + + // The following produces skBounds in SkGlyph units (pixels, y down), + // or returns early if skBounds would be empty. + SkRect skBounds; + + // Glyphs are always drawn from the horizontal origin. The caller must manually use the result + // of CTFontGetVerticalTranslationsForGlyphs to calculate where to draw the glyph for vertical + // glyphs. As a result, always get the horizontal bounds of a glyph and translate it if the + // glyph is vertical. This avoids any diagreement between the various means of retrieving + // vertical metrics. + { + // CTFontGetBoundingRectsForGlyphs produces cgBounds in CG units (pixels, y up). + CGRect cgBounds; + CTFontGetBoundingRectsForGlyphs(fCTFont.get(), kCTFontOrientationHorizontal, + &cgGlyph, &cgBounds, 1); + cgBounds = CGRectApplyAffineTransform(cgBounds, fTransform); + + // BUG? + // 0x200B (zero-advance space) seems to return a huge (garbage) bounds, when + // it should be empty. So, if we see a zero-advance, we check if it has an + // empty path or not, and if so, we jam the bounds to 0. Hopefully a zero-advance + // is rare, so we won't incur a big performance cost for this extra check. + // Avoid trying to create a path from a color font due to crashing on 10.9. + if (0 == cgAdvance.width && 0 == cgAdvance.height && + SkMask::kARGB32_Format != glyph->fMaskFormat) { + SkUniqueCFRef path(CTFontCreatePathForGlyph(fCTFont.get(), cgGlyph,nullptr)); + if (!path || CGPathIsEmpty(path.get())) { + return; + } + } + + if (SkCGRectIsEmpty(cgBounds)) { + return; + } + + // Convert cgBounds to SkGlyph units (pixels, y down). + skBounds = SkRect::MakeXYWH(cgBounds.origin.x, -cgBounds.origin.y - cgBounds.size.height, + cgBounds.size.width, cgBounds.size.height); + } + + // Currently the bounds are based on being rendered at (0,0). + // The top left must not move, since that is the base from which subpixel positioning is offset. + if (fDoSubPosition) { + skBounds.fRight += SkFixedToFloat(glyph->getSubXFixed()); + skBounds.fBottom += SkFixedToFloat(glyph->getSubYFixed()); + } + + // We're trying to pack left and top into int16_t, + // and width and height into uint16_t, after outsetting by 1. + if (!SkRect::MakeXYWH(-32767, -32767, 65535, 65535).contains(skBounds)) { + return; + } + + SkIRect skIBounds; + skBounds.roundOut(&skIBounds); + // Expand the bounds by 1 pixel, to give CG room for anti-aliasing. + // Note that this outset is to allow room for LCD smoothed glyphs. However, the correct outset + // is not currently known, as CG dilates the outlines by some percentage. + // Note that if this context is A8 and not back-forming from LCD, there is no need to outset. + skIBounds.outset(1, 1); + glyph->fLeft = SkToS16(skIBounds.fLeft); + glyph->fTop = SkToS16(skIBounds.fTop); + glyph->fWidth = SkToU16(skIBounds.width()); + glyph->fHeight = SkToU16(skIBounds.height()); +} + +static constexpr uint8_t sk_pow2_table(size_t i) { + return SkToU8(((i * i + 128) / 255)); +} + +/** + * This will invert the gamma applied by CoreGraphics, so we can get linear + * values. + * + * CoreGraphics obscurely defaults to 2.0 as the subpixel coverage gamma value. + * The color space used does not appear to affect this choice. + */ +static constexpr auto gLinearCoverageFromCGLCDValue = SkMakeArray<256>(sk_pow2_table); + +static void cgpixels_to_bits(uint8_t dst[], const CGRGBPixel src[], int count) { + while (count > 0) { + uint8_t mask = 0; + for (int i = 7; i >= 0; --i) { + mask |= ((CGRGBPixel_getAlpha(*src++) >> 7) ^ 0x1) << i; + if (0 == --count) { + break; + } + } + *dst++ = mask; + } +} + +template +static inline uint8_t rgb_to_a8(CGRGBPixel rgb, const uint8_t* table8) { + U8CPU r = 0xFF - ((rgb >> 16) & 0xFF); + U8CPU g = 0xFF - ((rgb >> 8) & 0xFF); + U8CPU b = 0xFF - ((rgb >> 0) & 0xFF); + U8CPU lum = sk_apply_lut_if(SkComputeLuminance(r, g, b), table8); + if constexpr (kSkShowTextBlitCoverage) { + lum = std::max(lum, (U8CPU)0x30); + } + return lum; +} + +template +static void RGBToA8(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, + const SkGlyph& glyph, void* glyphImage, const uint8_t* table8) { + const int width = glyph.width(); + const int height = glyph.height(); + size_t dstRB = glyph.rowBytes(); + uint8_t* SK_RESTRICT dst = (uint8_t*)glyphImage; + + for (int y = 0; y < height; y++) { + for (int i = 0; i < width; ++i) { + dst[i] = rgb_to_a8(cgPixels[i], table8); + } + cgPixels = SkTAddOffset(cgPixels, cgRowBytes); + dst = SkTAddOffset(dst, dstRB); + } +} + +template +static uint16_t RGBToLcd16(CGRGBPixel rgb, + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) { + U8CPU r = sk_apply_lut_if(0xFF - ((rgb >> 16) & 0xFF), tableR); + U8CPU g = sk_apply_lut_if(0xFF - ((rgb >> 8) & 0xFF), tableG); + U8CPU b = sk_apply_lut_if(0xFF - ((rgb >> 0) & 0xFF), tableB); + if constexpr (kSkShowTextBlitCoverage) { + r = std::max(r, (U8CPU)0x30); + g = std::max(g, (U8CPU)0x30); + b = std::max(b, (U8CPU)0x30); + } + return SkPack888ToRGB16(r, g, b); +} + +template +static void RGBToLcd16(const CGRGBPixel* SK_RESTRICT cgPixels, size_t cgRowBytes, + const SkGlyph& glyph, void* glyphImage, + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB) { + const int width = glyph.width(); + const int height = glyph.height(); + size_t dstRB = glyph.rowBytes(); + uint16_t* SK_RESTRICT dst = (uint16_t*)glyphImage; + + for (int y = 0; y < height; y++) { + for (int i = 0; i < width; i++) { + dst[i] = RGBToLcd16(cgPixels[i], tableR, tableG, tableB); + } + cgPixels = SkTAddOffset(cgPixels, cgRowBytes); + dst = SkTAddOffset(dst, dstRB); + } +} + +static SkPMColor cgpixels_to_pmcolor(CGRGBPixel rgb) { + U8CPU a = (rgb >> 24) & 0xFF; + U8CPU r = (rgb >> 16) & 0xFF; + U8CPU g = (rgb >> 8) & 0xFF; + U8CPU b = (rgb >> 0) & 0xFF; + if constexpr (kSkShowTextBlitCoverage) { + a = std::max(a, (U8CPU)0x30); + } + return SkPackARGB32(a, r, g, b); +} + +void SkScalerContext_Mac::generateImage(const SkGlyph& glyph) { + CGGlyph cgGlyph = SkTo(glyph.getGlyphID()); + + // FIXME: lcd smoothed un-hinted rasterization unsupported. + bool requestSmooth = fRec.getHinting() != SkFontHinting::kNone; + bool lightOnDark = (fRec.fFlags & SkScalerContext::kLightOnDark_Flag) != 0; + + // Draw the glyph + size_t cgRowBytes; + CGRGBPixel* cgPixels = fOffscreen.getCG(*this, glyph, cgGlyph, &cgRowBytes, requestSmooth, lightOnDark); + if (cgPixels == nullptr) { + return; + } + + // Fix the glyph + if ((glyph.fMaskFormat == SkMask::kLCD16_Format) || + (glyph.fMaskFormat == SkMask::kA8_Format + && requestSmooth + && SkCTFontGetSmoothBehavior() != SkCTFontSmoothBehavior::none)) + { + const uint8_t* linear = gLinearCoverageFromCGLCDValue.data(); + + //Note that the following cannot really be integrated into the + //pre-blend, since we may not be applying the pre-blend; when we aren't + //applying the pre-blend it means that a filter wants linear anyway. + //Other code may also be applying the pre-blend, so we'd need another + //one with this and one without. + CGRGBPixel* addr = cgPixels; + for (int y = 0; y < glyph.fHeight; ++y) { + for (int x = 0; x < glyph.fWidth; ++x) { + int r = linear[(addr[x] >> 16) & 0xFF]; + int g = linear[(addr[x] >> 8) & 0xFF]; + int b = linear[(addr[x] >> 0) & 0xFF]; + // If light-on-dark was requested, the mask is drawn inverted. + if (lightOnDark) { + r = 255 - r; + g = 255 - g; + b = 255 - b; + } + addr[x] = (r << 16) | (g << 8) | b; + } + addr = SkTAddOffset(addr, cgRowBytes); + } + } + + // Convert glyph to mask + switch (glyph.fMaskFormat) { + case SkMask::kLCD16_Format: { + if (fPreBlend.isApplicable()) { + RGBToLcd16(cgPixels, cgRowBytes, glyph, glyph.fImage, + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); + } else { + RGBToLcd16(cgPixels, cgRowBytes, glyph, glyph.fImage, + fPreBlend.fR, fPreBlend.fG, fPreBlend.fB); + } + } break; + case SkMask::kA8_Format: { + if (fPreBlend.isApplicable()) { + RGBToA8(cgPixels, cgRowBytes, glyph, glyph.fImage, fPreBlend.fG); + } else { + RGBToA8(cgPixels, cgRowBytes, glyph, glyph.fImage, fPreBlend.fG); + } + } break; + case SkMask::kBW_Format: { + const int width = glyph.fWidth; + size_t dstRB = glyph.rowBytes(); + uint8_t* dst = (uint8_t*)glyph.fImage; + for (int y = 0; y < glyph.fHeight; y++) { + cgpixels_to_bits(dst, cgPixels, width); + cgPixels = SkTAddOffset(cgPixels, cgRowBytes); + dst = SkTAddOffset(dst, dstRB); + } + } break; + case SkMask::kARGB32_Format: { + const int width = glyph.fWidth; + size_t dstRB = glyph.rowBytes(); + SkPMColor* dst = (SkPMColor*)glyph.fImage; + for (int y = 0; y < glyph.fHeight; y++) { + for (int x = 0; x < width; ++x) { + dst[x] = cgpixels_to_pmcolor(cgPixels[x]); + } + cgPixels = SkTAddOffset(cgPixels, cgRowBytes); + dst = SkTAddOffset(dst, dstRB); + } + } break; + default: + SkDEBUGFAIL("unexpected mask format"); + break; + } +} + +namespace { +class SkCTPathGeometrySink { + SkPathBuilder fBuilder; + bool fStarted; + CGPoint fCurrent; + + void goingTo(const CGPoint pt) { + if (!fStarted) { + fStarted = true; + fBuilder.moveTo(fCurrent.x, -fCurrent.y); + } + fCurrent = pt; + } + + bool currentIsNot(const CGPoint pt) { + return fCurrent.x != pt.x || fCurrent.y != pt.y; + } + +public: + SkCTPathGeometrySink() : fStarted{false}, fCurrent{0,0} {} + + SkPath detach() { return fBuilder.detach(); } + + static void ApplyElement(void *ctx, const CGPathElement *element) { + SkCTPathGeometrySink& self = *(SkCTPathGeometrySink*)ctx; + CGPoint* points = element->points; + + switch (element->type) { + case kCGPathElementMoveToPoint: + self.fStarted = false; + self.fCurrent = points[0]; + break; + + case kCGPathElementAddLineToPoint: + if (self.currentIsNot(points[0])) { + self.goingTo(points[0]); + self.fBuilder.lineTo(points[0].x, -points[0].y); + } + break; + + case kCGPathElementAddQuadCurveToPoint: + if (self.currentIsNot(points[0]) || self.currentIsNot(points[1])) { + self.goingTo(points[1]); + self.fBuilder.quadTo(points[0].x, -points[0].y, + points[1].x, -points[1].y); + } + break; + + case kCGPathElementAddCurveToPoint: + if (self.currentIsNot(points[0]) || + self.currentIsNot(points[1]) || + self.currentIsNot(points[2])) + { + self.goingTo(points[2]); + self.fBuilder.cubicTo(points[0].x, -points[0].y, + points[1].x, -points[1].y, + points[2].x, -points[2].y); + } + break; + + case kCGPathElementCloseSubpath: + if (self.fStarted) { + self.fBuilder.close(); + } + break; + + default: + SkDEBUGFAIL("Unknown path element!"); + break; + } + } +}; +} // namespace + +/* + * Our subpixel resolution is only 2 bits in each direction, so a scale of 4 + * seems sufficient, and possibly even correct, to allow the hinted outline + * to be subpixel positioned. + */ +#define kScaleForSubPixelPositionHinting (4.0f) + +bool SkScalerContext_Mac::generatePath(const SkGlyph& glyph, SkPath* path) { + SkScalar scaleX = SK_Scalar1; + SkScalar scaleY = SK_Scalar1; + + CGAffineTransform xform = fTransform; + /* + * For subpixel positioning, we want to return an unhinted outline, so it + * can be positioned nicely at fractional offsets. However, we special-case + * if the baseline of the (horizontal) text is axis-aligned. In those cases + * we want to retain hinting in the direction orthogonal to the baseline. + * e.g. for horizontal baseline, we want to retain hinting in Y. + * The way we remove hinting is to scale the font by some value (4) in that + * direction, ask for the path, and then scale the path back down. + */ + if (fDoSubPosition) { + // start out by assuming that we want no hining in X and Y + scaleX = scaleY = kScaleForSubPixelPositionHinting; + // now see if we need to restore hinting for axis-aligned baselines + switch (this->computeAxisAlignmentForHText()) { + case SkAxisAlignment::kX: + scaleY = SK_Scalar1; // want hinting in the Y direction + break; + case SkAxisAlignment::kY: + scaleX = SK_Scalar1; // want hinting in the X direction + break; + default: + break; + } + + CGAffineTransform scale(CGAffineTransformMakeScale(SkScalarToCGFloat(scaleX), + SkScalarToCGFloat(scaleY))); + xform = CGAffineTransformConcat(fTransform, scale); + } + + CGGlyph cgGlyph = SkTo(glyph.getGlyphID()); + SkUniqueCFRef cgPath(CTFontCreatePathForGlyph(fCTFont.get(), cgGlyph, &xform)); + + path->reset(); + if (!cgPath) { + return false; + } + + SkCTPathGeometrySink sink; + CGPathApply(cgPath.get(), &sink, SkCTPathGeometrySink::ApplyElement); + *path = sink.detach(); + if (fDoSubPosition) { + SkMatrix m; + m.setScale(SkScalarInvert(scaleX), SkScalarInvert(scaleY)); + path->transform(m); + } + return true; +} + +void SkScalerContext_Mac::generateFontMetrics(SkFontMetrics* metrics) { + if (nullptr == metrics) { + return; + } + + CGRect theBounds = CTFontGetBoundingBox(fCTFont.get()); + + metrics->fTop = SkScalarFromCGFloat(-SkCGRectGetMaxY(theBounds)); + metrics->fAscent = SkScalarFromCGFloat(-CTFontGetAscent(fCTFont.get())); + metrics->fDescent = SkScalarFromCGFloat( CTFontGetDescent(fCTFont.get())); + metrics->fBottom = SkScalarFromCGFloat(-SkCGRectGetMinY(theBounds)); + metrics->fLeading = SkScalarFromCGFloat( CTFontGetLeading(fCTFont.get())); + metrics->fAvgCharWidth = SkScalarFromCGFloat( SkCGRectGetWidth(theBounds)); + metrics->fXMin = SkScalarFromCGFloat( SkCGRectGetMinX(theBounds)); + metrics->fXMax = SkScalarFromCGFloat( SkCGRectGetMaxX(theBounds)); + metrics->fMaxCharWidth = metrics->fXMax - metrics->fXMin; + metrics->fXHeight = SkScalarFromCGFloat( CTFontGetXHeight(fCTFont.get())); + metrics->fCapHeight = SkScalarFromCGFloat( CTFontGetCapHeight(fCTFont.get())); + metrics->fUnderlineThickness = SkScalarFromCGFloat( CTFontGetUnderlineThickness(fCTFont.get())); + metrics->fUnderlinePosition = -SkScalarFromCGFloat( CTFontGetUnderlinePosition(fCTFont.get())); + metrics->fStrikeoutThickness = 0; + metrics->fStrikeoutPosition = 0; + + metrics->fFlags = 0; + metrics->fFlags |= SkFontMetrics::kUnderlineThicknessIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kUnderlinePositionIsValid_Flag; + + CFArrayRef ctAxes = ((SkTypeface_Mac*)this->getTypeface())->getVariationAxes(); + if ((ctAxes && CFArrayGetCount(ctAxes) > 0) || + ((SkTypeface_Mac*)this->getTypeface())->fHasColorGlyphs) + { + // The bounds are only valid for the default outline variation. + // In particular `sbix` and `SVG ` data may draw outside these bounds. + metrics->fFlags |= SkFontMetrics::kBoundsInvalid_Flag; + } + + sk_sp os2 = this->getTypeface()->copyTableData(SkTEndian_SwapBE32(SkOTTableOS2::TAG)); + if (os2) { + // 'fontSize' is correct because the entire resolved size is set by the constructor. + const CGFloat fontSize = CTFontGetSize(fCTFont.get()); + const unsigned int upem = CTFontGetUnitsPerEm(fCTFont.get()); + const unsigned int maxSaneHeight = upem * 2; + + // See https://bugs.chromium.org/p/skia/issues/detail?id=6203 + // At least on 10.12.3 with memory based fonts the x-height is always 0.6666 of the ascent + // and the cap-height is always 0.8888 of the ascent. It appears that the values from the + // 'OS/2' table are read, but then overwritten if the font is not a system font. As a + // result, if there is a valid 'OS/2' table available use the values from the table if they + // aren't too strange. + if (sizeof(SkOTTableOS2_V2) <= os2->size()) { + const SkOTTableOS2_V2* os2v2 = static_cast(os2->data()); + uint16_t xHeight = SkEndian_SwapBE16(os2v2->sxHeight); + if (xHeight && xHeight < maxSaneHeight) { + metrics->fXHeight = SkScalarFromCGFloat(xHeight * fontSize / upem); + } + uint16_t capHeight = SkEndian_SwapBE16(os2v2->sCapHeight); + if (capHeight && capHeight < maxSaneHeight) { + metrics->fCapHeight = SkScalarFromCGFloat(capHeight * fontSize / upem); + } + } + + // CoreText does not provide the strikeout metrics, which are available in OS/2 version 0. + if (sizeof(SkOTTableOS2_V0) <= os2->size()) { + const SkOTTableOS2_V0* os2v0 = static_cast(os2->data()); + uint16_t strikeoutSize = SkEndian_SwapBE16(os2v0->yStrikeoutSize); + if (strikeoutSize && strikeoutSize < maxSaneHeight) { + metrics->fStrikeoutThickness = SkScalarFromCGFloat(strikeoutSize * fontSize / upem); + metrics->fFlags |= SkFontMetrics::kStrikeoutThicknessIsValid_Flag; + } + uint16_t strikeoutPos = SkEndian_SwapBE16(os2v0->yStrikeoutPosition); + if (strikeoutPos && strikeoutPos < maxSaneHeight) { + metrics->fStrikeoutPosition = -SkScalarFromCGFloat(strikeoutPos * fontSize / upem); + metrics->fFlags |= SkFontMetrics::kStrikeoutPositionIsValid_Flag; + } + } + } +} + +#endif diff --git a/gfx/skia/skia/src/ports/SkScalerContext_mac_ct.h b/gfx/skia/skia/src/ports/SkScalerContext_mac_ct.h new file mode 100644 index 0000000000..be034bd2c7 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkScalerContext_mac_ct.h @@ -0,0 +1,112 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkScalerContext_mac_ct_DEFINED +#define SkScalerContext_mac_ct_DEFINED + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#include "include/core/SkRefCnt.h" +#include "include/core/SkSize.h" +#include "src/base/SkAutoMalloc.h" +#include "src/core/SkScalerContext.h" +#include "src/utils/mac/SkUniqueCFRef.h" + +#ifdef SK_BUILD_FOR_MAC +#import +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#include +#include +#include +#endif + +#include + +class SkDescriptor; +class SkGlyph; +class SkPath; +class SkTypeface_Mac; +struct SkFontMetrics; + + +typedef uint32_t CGRGBPixel; + +class SkScalerContext_Mac : public SkScalerContext { +public: + SkScalerContext_Mac(sk_sp, const SkScalerContextEffects&, const SkDescriptor*); + +protected: + bool generateAdvance(SkGlyph* glyph) override; + void generateMetrics(SkGlyph* glyph, SkArenaAlloc*) override; + void generateImage(const SkGlyph& glyph) override; + bool generatePath(const SkGlyph& glyph, SkPath* path) override; + void generateFontMetrics(SkFontMetrics*) override; + +private: + class Offscreen { + public: + Offscreen(SkColor foregroundColor); + + CGRGBPixel* getCG(const SkScalerContext_Mac& context, const SkGlyph& glyph, + CGGlyph glyphID, size_t* rowBytesPtr, bool generateA8FromLCD, + bool lightOnDark); + + private: + enum { + kSize = 32 * 32 * sizeof(CGRGBPixel) + }; + SkAutoSMalloc fImageStorage; + SkUniqueCFRef fRGBSpace; + + // cached state + SkUniqueCFRef fCG; + SkUniqueCFRef fCGForegroundColor; + SkColor fSKForegroundColor; + SkISize fSize; + bool fDoAA; + bool fDoLCD; + }; + Offscreen fOffscreen; + + /** Unrotated variant of fCTFont. + * + * In 10.10.1 CTFontGetAdvancesForGlyphs applies the font transform to the width of the + * advances, but always sets the height to 0. This font is used to get the advances of the + * unrotated glyph, and then the rotation is applied separately. + * + * CT vertical metrics are pre-rotated (in em space, before transform) 90deg clock-wise. + * This makes kCTFontOrientationDefault dangerous, because the metrics from + * kCTFontOrientationHorizontal are in a different space from kCTFontOrientationVertical. + * With kCTFontOrientationVertical the advances must be unrotated. + * + * Sometimes, creating a copy of a CTFont with the same size but different trasform will select + * different underlying font data. As a result, avoid ever creating more than one CTFont per + * SkScalerContext to ensure that only one CTFont is used. + * + * As a result of the above (and other constraints) this font contains the size, but not the + * transform. The transform must always be applied separately. + */ + SkUniqueCFRef fCTFont; + + /** The transform without the font size. */ + CGAffineTransform fTransform; + CGAffineTransform fInvTransform; + + SkUniqueCFRef fCGFont; + const bool fDoSubPosition; + + friend class Offscreen; + + using INHERITED = SkScalerContext; +}; + +#endif +#endif //SkScalerContext_mac_ct_DEFINED diff --git a/gfx/skia/skia/src/ports/SkScalerContext_win_dw.cpp b/gfx/skia/skia/src/ports/SkScalerContext_win_dw.cpp new file mode 100644 index 0000000000..7f7f72191b --- /dev/null +++ b/gfx/skia/skia/src/ports/SkScalerContext_win_dw.cpp @@ -0,0 +1,1523 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/utils/win/SkDWriteNTDDI_VERSION.h" + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) + +#undef GetGlyphIndices + +#include "include/codec/SkCodec.h" +#include "include/core/SkBBHFactory.h" +#include "include/core/SkBitmap.h" +#include "include/core/SkData.h" +#include "include/core/SkDrawable.h" +#include "include/core/SkFontMetrics.h" +#include "include/core/SkGraphics.h" +#include "include/core/SkOpenTypeSVGDecoder.h" +#include "include/core/SkPath.h" +#include "include/core/SkPictureRecorder.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkEndian.h" +#include "src/core/SkDraw.h" +#include "src/core/SkGlyph.h" +#include "src/core/SkMaskGamma.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterClip.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkSharedMutex.h" +#include "src/ports/SkScalerContext_win_dw.h" +#include "src/ports/SkTypeface_win_dw.h" +#include "src/sfnt/SkOTTable_EBLC.h" +#include "src/sfnt/SkOTTable_EBSC.h" +#include "src/sfnt/SkOTTable_gasp.h" +#include "src/sfnt/SkOTTable_maxp.h" +#include "src/utils/SkMatrix22.h" +#include "src/utils/win/SkDWrite.h" +#include "src/utils/win/SkDWriteGeometrySink.h" +#include "src/utils/win/SkHRESULT.h" +#include "src/utils/win/SkTScopedComPtr.h" + +#include +#include +#include + +namespace { +static inline const constexpr bool kSkShowTextBlitCoverage = false; + +/* Note: + * In versions 8 and 8.1 of Windows, some calls in DWrite are not thread safe. + * The mutex returned from maybe_dw_mutex protects the calls that are + * problematic. + */ +static SkSharedMutex* maybe_dw_mutex(DWriteFontTypeface& typeface) { + static SkSharedMutex mutex; + return typeface.fDWriteFontFace4 ? nullptr : &mutex; +} + +class SK_SCOPED_CAPABILITY Exclusive { +public: + explicit Exclusive(SkSharedMutex* maybe_lock) SK_ACQUIRE(*maybe_lock) + : fLock(maybe_lock) { + if (fLock) { + fLock->acquire(); + } + } + ~Exclusive() SK_RELEASE_CAPABILITY() { + if (fLock) { + fLock->release(); + } + } + +private: + SkSharedMutex* fLock; +}; +class SK_SCOPED_CAPABILITY Shared { +public: + explicit Shared(SkSharedMutex* maybe_lock) SK_ACQUIRE_SHARED(*maybe_lock) + : fLock(maybe_lock) { + if (fLock) { + fLock->acquireShared(); + } + } + + // You would think this should be SK_RELEASE_SHARED_CAPABILITY, but SK_SCOPED_CAPABILITY + // doesn't fully understand the difference between shared and exclusive. + // Please review https://reviews.llvm.org/D52578 for more information. + ~Shared() SK_RELEASE_CAPABILITY() { + if (fLock) { + fLock->releaseShared(); + } + } + +private: + SkSharedMutex* fLock; +}; + +static bool isLCD(const SkScalerContextRec& rec) { + return SkMask::kLCD16_Format == rec.fMaskFormat; +} + +static bool is_hinted(DWriteFontTypeface* typeface) { + Exclusive l(maybe_dw_mutex(*typeface)); + AutoTDWriteTable maxp(typeface->fDWriteFontFace.get()); + if (!maxp.fExists) { + return false; + } + if (maxp.fSize < sizeof(SkOTTableMaximumProfile::Version::TT)) { + return false; + } + if (maxp->version.version != SkOTTableMaximumProfile::Version::TT::VERSION) { + return false; + } + return (0 != maxp->version.tt.maxSizeOfInstructions); +} + +/** A GaspRange is inclusive, [min, max]. */ +struct GaspRange { + using Behavior = SkOTTableGridAndScanProcedure::GaspRange::behavior; + GaspRange(int min, int max, int version, Behavior flags) + : fMin(min), fMax(max), fVersion(version), fFlags(flags) { } + int fMin; + int fMax; + int fVersion; + Behavior fFlags; +}; + +bool get_gasp_range(DWriteFontTypeface* typeface, int size, GaspRange* range) { + AutoTDWriteTable gasp(typeface->fDWriteFontFace.get()); + if (!gasp.fExists) { + return false; + } + if (gasp.fSize < sizeof(SkOTTableGridAndScanProcedure)) { + return false; + } + if (gasp->version != SkOTTableGridAndScanProcedure::version0 && + gasp->version != SkOTTableGridAndScanProcedure::version1) + { + return false; + } + + uint16_t numRanges = SkEndianSwap16(gasp->numRanges); + if (numRanges > 1024 || + gasp.fSize < sizeof(SkOTTableGridAndScanProcedure) + + sizeof(SkOTTableGridAndScanProcedure::GaspRange) * numRanges) + { + return false; + } + + const SkOTTableGridAndScanProcedure::GaspRange* rangeTable = + SkTAfter(gasp.get()); + int minPPEM = -1; + for (uint16_t i = 0; i < numRanges; ++i, ++rangeTable) { + int maxPPEM = SkEndianSwap16(rangeTable->maxPPEM); + if (minPPEM < size && size <= maxPPEM) { + range->fMin = minPPEM + 1; + range->fMax = maxPPEM; + range->fVersion = SkEndian_SwapBE16(gasp->version); + range->fFlags = rangeTable->flags; + return true; + } + minPPEM = maxPPEM; + } + return false; +} +/** If the rendering mode for the specified 'size' is gridfit, then place + * the gridfit range into 'range'. Otherwise, leave 'range' alone. + */ +static bool is_gridfit_only(GaspRange::Behavior flags) { + return flags.raw.value == GaspRange::Behavior::Raw::GridfitMask; +} + +static bool has_bitmap_strike(DWriteFontTypeface* typeface, GaspRange range) { + Exclusive l(maybe_dw_mutex(*typeface)); + { + AutoTDWriteTable eblc(typeface->fDWriteFontFace.get()); + if (!eblc.fExists) { + return false; + } + if (eblc.fSize < sizeof(SkOTTableEmbeddedBitmapLocation)) { + return false; + } + if (eblc->version != SkOTTableEmbeddedBitmapLocation::version_initial) { + return false; + } + + uint32_t numSizes = SkEndianSwap32(eblc->numSizes); + if (numSizes > 1024 || + eblc.fSize < sizeof(SkOTTableEmbeddedBitmapLocation) + + sizeof(SkOTTableEmbeddedBitmapLocation::BitmapSizeTable) * numSizes) + { + return false; + } + + const SkOTTableEmbeddedBitmapLocation::BitmapSizeTable* sizeTable = + SkTAfter(eblc.get()); + for (uint32_t i = 0; i < numSizes; ++i, ++sizeTable) { + if (sizeTable->ppemX == sizeTable->ppemY && + range.fMin <= sizeTable->ppemX && sizeTable->ppemX <= range.fMax) + { + // TODO: determine if we should dig through IndexSubTableArray/IndexSubTable + // to determine the actual number of glyphs with bitmaps. + + // TODO: Ensure that the bitmaps actually cover a significant portion of the strike. + + // TODO: Ensure that the bitmaps are bi-level? + if (sizeTable->endGlyphIndex >= sizeTable->startGlyphIndex + 3) { + return true; + } + } + } + } + + { + AutoTDWriteTable ebsc(typeface->fDWriteFontFace.get()); + if (!ebsc.fExists) { + return false; + } + if (ebsc.fSize < sizeof(SkOTTableEmbeddedBitmapScaling)) { + return false; + } + if (ebsc->version != SkOTTableEmbeddedBitmapScaling::version_initial) { + return false; + } + + uint32_t numSizes = SkEndianSwap32(ebsc->numSizes); + if (numSizes > 1024 || + ebsc.fSize < sizeof(SkOTTableEmbeddedBitmapScaling) + + sizeof(SkOTTableEmbeddedBitmapScaling::BitmapScaleTable) * numSizes) + { + return false; + } + + const SkOTTableEmbeddedBitmapScaling::BitmapScaleTable* scaleTable = + SkTAfter(ebsc.get()); + for (uint32_t i = 0; i < numSizes; ++i, ++scaleTable) { + if (scaleTable->ppemX == scaleTable->ppemY && + range.fMin <= scaleTable->ppemX && scaleTable->ppemX <= range.fMax) { + // EBSC tables are normally only found in bitmap only fonts. + return true; + } + } + } + + return false; +} + +static bool both_zero(SkScalar a, SkScalar b) { + return 0 == a && 0 == b; +} + +// returns false if there is any non-90-rotation or skew +static bool is_axis_aligned(const SkScalerContextRec& rec) { + return 0 == rec.fPreSkewX && + (both_zero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || + both_zero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); +} + +} //namespace + +SkScalerContext_DW::SkScalerContext_DW(sk_sp typefaceRef, + const SkScalerContextEffects& effects, + const SkDescriptor* desc) + : SkScalerContext(std::move(typefaceRef), effects, desc) +{ + DWriteFontTypeface* typeface = this->getDWriteTypeface(); + fGlyphCount = typeface->fDWriteFontFace->GetGlyphCount(); + + fClearTypeLevel = int(typeface->GetClearTypeLevel() * 256); + + // In general, all glyphs should use DWriteFontFace::GetRecommendedRenderingMode + // except when bi-level rendering is requested or there are embedded + // bi-level bitmaps (and the embedded bitmap flag is set and no rotation). + // + // DirectWrite's IDWriteFontFace::GetRecommendedRenderingMode does not do + // this. As a result, determine the actual size of the text and then see if + // there are any embedded bi-level bitmaps of that size. If there are, then + // force bitmaps by requesting bi-level rendering. + // + // FreeType allows for separate ppemX and ppemY, but DirectWrite assumes + // square pixels and only uses ppemY. Therefore the transform must track any + // non-uniform x-scale. + // + // Also, rotated glyphs should have the same absolute advance widths as + // horizontal glyphs and the subpixel flag should not affect glyph shapes. + + SkVector scale; + fRec.computeMatrices(SkScalerContextRec::PreMatrixScale::kVertical, &scale, &fSkXform); + + fXform.m11 = SkScalarToFloat(fSkXform.getScaleX()); + fXform.m12 = SkScalarToFloat(fSkXform.getSkewY()); + fXform.m21 = SkScalarToFloat(fSkXform.getSkewX()); + fXform.m22 = SkScalarToFloat(fSkXform.getScaleY()); + fXform.dx = 0; + fXform.dy = 0; + + // realTextSize is the actual device size we want (as opposed to the size the user requested). + // gdiTextSize is the size we request when GDI compatible. + // If the scale is negative, this means the matrix will do the flip anyway. + const SkScalar realTextSize = scale.fY; + // Due to floating point math, the lower bits are suspect. Round carefully. + SkScalar gdiTextSize = SkScalarRoundToScalar(realTextSize * 64.0f) / 64.0f; + if (gdiTextSize == 0) { + gdiTextSize = SK_Scalar1; + } + + bool bitmapRequested = SkToBool(fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag); + bool treatLikeBitmap = false; + bool axisAlignedBitmap = false; + if (bitmapRequested) { + // When embedded bitmaps are requested, treat the entire range like + // a bitmap strike if the range is gridfit only and contains a bitmap. + int bitmapPPEM = SkScalarTruncToInt(gdiTextSize); + GaspRange range(bitmapPPEM, bitmapPPEM, 0, GaspRange::Behavior()); + if (get_gasp_range(typeface, bitmapPPEM, &range)) { + if (!is_gridfit_only(range.fFlags)) { + range = GaspRange(bitmapPPEM, bitmapPPEM, 0, GaspRange::Behavior()); + } + } + treatLikeBitmap = has_bitmap_strike(typeface, range); + + axisAlignedBitmap = is_axis_aligned(fRec); + } + + GaspRange range(0, 0xFFFF, 0, GaspRange::Behavior()); + + // If the user requested aliased, do so with aliased compatible metrics. + if (SkMask::kBW_Format == fRec.fMaskFormat) { + fTextSizeRender = gdiTextSize; + fRenderingMode = DWRITE_RENDERING_MODE_ALIASED; + fTextureType = DWRITE_TEXTURE_ALIASED_1x1; + fTextSizeMeasure = gdiTextSize; + fMeasuringMode = DWRITE_MEASURING_MODE_GDI_CLASSIC; + + // If we can use a bitmap, use gdi classic rendering and measurement. + // This will not always provide a bitmap, but matches expected behavior. + } else if ((treatLikeBitmap && axisAlignedBitmap) || typeface->ForceGDI()) { + fTextSizeRender = gdiTextSize; + fRenderingMode = DWRITE_RENDERING_MODE_GDI_CLASSIC; + fTextureType = DWRITE_TEXTURE_CLEARTYPE_3x1; + fTextSizeMeasure = gdiTextSize; + fMeasuringMode = DWRITE_MEASURING_MODE_GDI_CLASSIC; + + // If rotated but the horizontal text could have used a bitmap, + // render high quality rotated glyphs but measure using bitmap metrics. + } else if (treatLikeBitmap) { + fTextSizeRender = gdiTextSize; + fRenderingMode = DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC; + fTextureType = DWRITE_TEXTURE_CLEARTYPE_3x1; + fTextSizeMeasure = gdiTextSize; + fMeasuringMode = DWRITE_MEASURING_MODE_GDI_CLASSIC; + + // Force symmetric if the font is above the threshold or there is an explicit mode. + // Here we check if the size exceeds 20 before checking the GASP table to match the + // results of calling GetRecommendedRenderingMode/Direct2D, which skip looking at + // the GASP table if the text is too large. + } else if (realTextSize > SkIntToScalar(20) || + typeface->GetRenderingMode() == DWRITE_RENDERING_MODE_NATURAL || + typeface->GetRenderingMode() == DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC) { + fTextSizeRender = realTextSize; + fRenderingMode = typeface->GetRenderingMode() == DWRITE_RENDERING_MODE_NATURAL ? + DWRITE_RENDERING_MODE_NATURAL : DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC; + fTextureType = DWRITE_TEXTURE_CLEARTYPE_3x1; + fTextSizeMeasure = realTextSize; + fMeasuringMode = DWRITE_MEASURING_MODE_NATURAL; + // If the font has a gasp table version 1, use it to determine symmetric rendering. + } else if (get_gasp_range(typeface, SkScalarRoundToInt(gdiTextSize), &range) && + range.fVersion >= 1) { + fTextSizeRender = realTextSize; + fRenderingMode = !range.fFlags.field.SymmetricSmoothing ? + DWRITE_RENDERING_MODE_NATURAL : DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC; + fTextureType = DWRITE_TEXTURE_CLEARTYPE_3x1; + fTextSizeMeasure = realTextSize; + fMeasuringMode = DWRITE_MEASURING_MODE_NATURAL; + // Fonts with hints, no gasp or gasp version 0, and below 20px get non-symmetric rendering. + // Often such fonts have hints which were only tested with GDI ClearType classic. + // Some of these fonts rely on drop out control in the y direction in order to be legible. + // Tenor Sans + // https://fonts.google.com/specimen/Tenor+Sans + // Gill Sans W04 + // https://cdn.leagueoflegends.com/lolkit/1.1.9/resources/fonts/gill-sans-w04-book.woff + // https://na.leagueoflegends.com/en/news/game-updates/patch/patch-410-notes + // See https://crbug.com/385897 + } else { + if (is_hinted(typeface)) { + fTextSizeRender = gdiTextSize; + fRenderingMode = DWRITE_RENDERING_MODE_NATURAL; + } else { + // Unhinted but with no gasp and below 20px defaults to symmetric for + // GetRecommendedRenderingMode. + fTextSizeRender = realTextSize; + fRenderingMode = DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC; + } + fTextureType = DWRITE_TEXTURE_CLEARTYPE_3x1; + fTextSizeMeasure = realTextSize; + fMeasuringMode = DWRITE_MEASURING_MODE_NATURAL; + } + + // DirectWrite2 allows for grayscale hinting. + fAntiAliasMode = DWRITE_TEXT_ANTIALIAS_MODE_CLEARTYPE; + if (typeface->fFactory2 && typeface->fDWriteFontFace2 && + SkMask::kA8_Format == fRec.fMaskFormat && + !(fRec.fFlags & SkScalerContext::kGenA8FromLCD_Flag)) + { + // DWRITE_TEXTURE_ALIASED_1x1 is now misnamed, it must also be used with grayscale. + fTextureType = DWRITE_TEXTURE_ALIASED_1x1; + fAntiAliasMode = DWRITE_TEXT_ANTIALIAS_MODE_GRAYSCALE; + } + + // DirectWrite2 allows hinting to be disabled. + fGridFitMode = DWRITE_GRID_FIT_MODE_ENABLED; + if (fRec.getHinting() == SkFontHinting::kNone) { + fGridFitMode = DWRITE_GRID_FIT_MODE_DISABLED; + if (fRenderingMode != DWRITE_RENDERING_MODE_ALIASED) { + fRenderingMode = DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC; + } + } + + if (this->isLinearMetrics()) { + fTextSizeMeasure = realTextSize; + fMeasuringMode = DWRITE_MEASURING_MODE_NATURAL; + } + + // The GDI measuring modes don't seem to work well with CBDT fonts (DWrite.dll 10.0.18362.836). + if (fMeasuringMode != DWRITE_MEASURING_MODE_NATURAL) { + constexpr UINT32 CBDTTag = DWRITE_MAKE_OPENTYPE_TAG('C','B','D','T'); + AutoDWriteTable CBDT(typeface->fDWriteFontFace.get(), CBDTTag); + if (CBDT.fExists) { + fMeasuringMode = DWRITE_MEASURING_MODE_NATURAL; + } + } +} + +SkScalerContext_DW::~SkScalerContext_DW() { +} + +bool SkScalerContext_DW::generateAdvance(SkGlyph* glyph) { + glyph->fAdvanceX = 0; + glyph->fAdvanceY = 0; + uint16_t glyphId = glyph->getGlyphID(); + DWriteFontTypeface* typeface = this->getDWriteTypeface(); + + // DirectWrite treats all out of bounds glyph ids as having the same data as glyph 0. + // For consistency with all other backends, treat out of range glyph ids as an error. + if (fGlyphCount <= glyphId) { + return false; + } + + DWRITE_GLYPH_METRICS gm; + + if (DWRITE_MEASURING_MODE_GDI_CLASSIC == fMeasuringMode || + DWRITE_MEASURING_MODE_GDI_NATURAL == fMeasuringMode) + { + Exclusive l(maybe_dw_mutex(*typeface)); + HRBM(typeface->fDWriteFontFace->GetGdiCompatibleGlyphMetrics( + fTextSizeMeasure, + 1.0f, // pixelsPerDip + // This parameter does not act like the lpmat2 parameter to GetGlyphOutlineW. + // If it did then GsA here and G_inv below to mapVectors. + nullptr, + DWRITE_MEASURING_MODE_GDI_NATURAL == fMeasuringMode, + &glyphId, 1, + &gm), + "Could not get gdi compatible glyph metrics."); + } else { + Exclusive l(maybe_dw_mutex(*typeface)); + HRBM(typeface->fDWriteFontFace->GetDesignGlyphMetrics(&glyphId, 1, &gm), + "Could not get design metrics."); + } + + DWRITE_FONT_METRICS dwfm; + { + Shared l(maybe_dw_mutex(*typeface)); + typeface->fDWriteFontFace->GetMetrics(&dwfm); + } + SkScalar advanceX = fTextSizeMeasure * gm.advanceWidth / dwfm.designUnitsPerEm; + + SkVector advance = { advanceX, 0 }; + if (DWRITE_MEASURING_MODE_GDI_CLASSIC == fMeasuringMode || + DWRITE_MEASURING_MODE_GDI_NATURAL == fMeasuringMode) + { + // DirectWrite produced 'compatible' metrics, but while close, + // the end result is not always an integer as it would be with GDI. + advance.fX = SkScalarRoundToScalar(advance.fX); + } + fSkXform.mapVectors(&advance, 1); + + glyph->fAdvanceX = SkScalarToFloat(advance.fX); + glyph->fAdvanceY = SkScalarToFloat(advance.fY); + return true; +} + +HRESULT SkScalerContext_DW::getBoundingBox(SkGlyph* glyph, + DWRITE_RENDERING_MODE renderingMode, + DWRITE_TEXTURE_TYPE textureType, + RECT* bbox) +{ + DWriteFontTypeface* typeface = this->getDWriteTypeface(); + + //Measure raster size. + fXform.dx = SkFixedToFloat(glyph->getSubXFixed()); + fXform.dy = SkFixedToFloat(glyph->getSubYFixed()); + + FLOAT advance = 0; + + UINT16 glyphId = glyph->getGlyphID(); + + DWRITE_GLYPH_OFFSET offset; + offset.advanceOffset = 0.0f; + offset.ascenderOffset = 0.0f; + + DWRITE_GLYPH_RUN run; + run.glyphCount = 1; + run.glyphAdvances = &advance; + run.fontFace = typeface->fDWriteFontFace.get(); + run.fontEmSize = SkScalarToFloat(fTextSizeRender); + run.bidiLevel = 0; + run.glyphIndices = &glyphId; + run.isSideways = FALSE; + run.glyphOffsets = &offset; + + SkTScopedComPtr glyphRunAnalysis; + { + Exclusive l(maybe_dw_mutex(*typeface)); + // IDWriteFactory2::CreateGlyphRunAnalysis is very bad at aliased glyphs. + if (typeface->fFactory2 && + (fGridFitMode == DWRITE_GRID_FIT_MODE_DISABLED || + fAntiAliasMode == DWRITE_TEXT_ANTIALIAS_MODE_GRAYSCALE)) + { + HRM(typeface->fFactory2->CreateGlyphRunAnalysis( + &run, + &fXform, + renderingMode, + fMeasuringMode, + fGridFitMode, + fAntiAliasMode, + 0.0f, // baselineOriginX, + 0.0f, // baselineOriginY, + &glyphRunAnalysis), + "Could not create DW2 glyph run analysis."); + } else { + HRM(typeface->fFactory->CreateGlyphRunAnalysis(&run, + 1.0f, // pixelsPerDip, + &fXform, + renderingMode, + fMeasuringMode, + 0.0f, // baselineOriginX, + 0.0f, // baselineOriginY, + &glyphRunAnalysis), + "Could not create glyph run analysis."); + } + } + { + Shared l(maybe_dw_mutex(*typeface)); + HRM(glyphRunAnalysis->GetAlphaTextureBounds(textureType, bbox), + "Could not get texture bounds."); + } + return S_OK; +} + +bool SkScalerContext_DW::isColorGlyph(const SkGlyph& glyph) { + // One would think that with newer DirectWrite that this could be like isPngGlyph + // except test for DWRITE_GLYPH_IMAGE_FORMATS_COLR, but that doesn't seem to work. + + SkTScopedComPtr colorLayer; + return getColorGlyphRun(glyph, &colorLayer); +} + +bool SkScalerContext_DW::isPngGlyph(const SkGlyph& glyph) { + if (!this->getDWriteTypeface()->fDWriteFontFace4) { + return false; + } + + DWRITE_GLYPH_IMAGE_FORMATS f; + IDWriteFontFace4* fontFace4 = this->getDWriteTypeface()->fDWriteFontFace4.get(); + HRBM(fontFace4->GetGlyphImageFormats(glyph.getGlyphID(), 0, UINT32_MAX, &f), + "Cannot get glyph image formats."); + return f & DWRITE_GLYPH_IMAGE_FORMATS_PNG; +} + +bool SkScalerContext_DW::isSVGGlyph(const SkGlyph& glyph) { + if (!SkGraphics::GetOpenTypeSVGDecoderFactory() || + !this->getDWriteTypeface()->fDWriteFontFace4) + { + return false; + } + + DWRITE_GLYPH_IMAGE_FORMATS f; + IDWriteFontFace4* fontFace4 = this->getDWriteTypeface()->fDWriteFontFace4.get(); + HRBM(fontFace4->GetGlyphImageFormats(glyph.getGlyphID(), 0, UINT32_MAX, &f), + "Cannot get glyph image formats."); + return f & DWRITE_GLYPH_IMAGE_FORMATS_SVG; +} + +bool SkScalerContext_DW::getColorGlyphRun(const SkGlyph& glyph, + IDWriteColorGlyphRunEnumerator** colorGlyph) +{ + FLOAT advance = 0; + UINT16 glyphId = glyph.getGlyphID(); + + DWRITE_GLYPH_OFFSET offset; + offset.advanceOffset = 0.0f; + offset.ascenderOffset = 0.0f; + + DWRITE_GLYPH_RUN run; + run.glyphCount = 1; + run.glyphAdvances = &advance; + run.fontFace = this->getDWriteTypeface()->fDWriteFontFace.get(); + run.fontEmSize = SkScalarToFloat(fTextSizeRender); + run.bidiLevel = 0; + run.glyphIndices = &glyphId; + run.isSideways = FALSE; + run.glyphOffsets = &offset; + + HRESULT hr = this->getDWriteTypeface()->fFactory2->TranslateColorGlyphRun( + 0, 0, &run, nullptr, fMeasuringMode, &fXform, 0, colorGlyph); + if (hr == DWRITE_E_NOCOLOR) { + return false; + } + HRBM(hr, "Failed to translate color glyph run"); + return true; +} + +void SkScalerContext_DW::SetGlyphBounds(SkGlyph* glyph, const SkRect& bounds) { + SkIRect ibounds = bounds.roundOut(); + + if (!SkTFitsInfWidth )>(ibounds.width ()) || + !SkTFitsInfHeight)>(ibounds.height()) || + !SkTFitsInfTop )>(ibounds.top ()) || + !SkTFitsInfLeft )>(ibounds.left ()) ) + { + ibounds = SkIRect::MakeEmpty(); + } + + glyph->fWidth = SkToU16(ibounds.width ()); + glyph->fHeight = SkToU16(ibounds.height()); + glyph->fTop = SkToS16(ibounds.top ()); + glyph->fLeft = SkToS16(ibounds.left ()); +} + +bool SkScalerContext_DW::generateColorMetrics(SkGlyph* glyph) { + SkTScopedComPtr colorLayers; + if (!getColorGlyphRun(*glyph, &colorLayers)) { + return false; + } + SkASSERT(colorLayers.get()); + + SkRect bounds = SkRect::MakeEmpty(); + BOOL hasNextRun = FALSE; + while (SUCCEEDED(colorLayers->MoveNext(&hasNextRun)) && hasNextRun) { + const DWRITE_COLOR_GLYPH_RUN* colorGlyph; + HRBM(colorLayers->GetCurrentRun(&colorGlyph), "Could not get current color glyph run"); + + SkPath path; + SkTScopedComPtr geometryToPath; + HRBM(SkDWriteGeometrySink::Create(&path, &geometryToPath), + "Could not create geometry to path converter."); + { + Exclusive l(maybe_dw_mutex(*this->getDWriteTypeface())); + HRBM(colorGlyph->glyphRun.fontFace->GetGlyphRunOutline( + colorGlyph->glyphRun.fontEmSize, + colorGlyph->glyphRun.glyphIndices, + colorGlyph->glyphRun.glyphAdvances, + colorGlyph->glyphRun.glyphOffsets, + colorGlyph->glyphRun.glyphCount, + colorGlyph->glyphRun.isSideways, + colorGlyph->glyphRun.bidiLevel % 2, //rtl + geometryToPath.get()), + "Could not create glyph outline."); + } + bounds.join(path.getBounds()); + } + SkMatrix matrix = fSkXform; + if (this->isSubpixel()) { + matrix.postTranslate(SkFixedToScalar(glyph->getSubXFixed()), + SkFixedToScalar(glyph->getSubYFixed())); + } + matrix.mapRect(&bounds); + SetGlyphBounds(glyph, bounds); + return true; +} + +#ifdef USE_SVG +bool SkScalerContext_DW::generateSVGMetrics(SkGlyph* glyph) { + SkPictureRecorder recorder; + SkRect infiniteRect = SkRect::MakeLTRB(-SK_ScalarInfinity, -SK_ScalarInfinity, + SK_ScalarInfinity, SK_ScalarInfinity); + sk_sp bboxh = SkRTreeFactory()(); + SkCanvas* recordingCanvas = recorder.beginRecording(infiniteRect, bboxh); + if (!this->drawSVGGlyphImage(*glyph, *recordingCanvas)) { + return false; + } + sk_sp pic = recorder.finishRecordingAsPicture(); + SkRect bounds = pic->cullRect(); + SkASSERT(bounds.isFinite()); + + SetGlyphBounds(glyph, bounds); + return true; +} +#endif + +#ifdef USE_PNG +namespace { +struct Context { + SkTScopedComPtr fontFace4; + void* glyphDataContext; + Context(IDWriteFontFace4* face4, void* context) + : fontFace4(SkRefComPtr(face4)) + , glyphDataContext(context) + {} +}; + +static void ReleaseProc(const void* ptr, void* context) { + Context* ctx = (Context*)context; + ctx->fontFace4->ReleaseGlyphImageData(ctx->glyphDataContext); + delete ctx; +} +} + +bool SkScalerContext_DW::generatePngMetrics(SkGlyph* glyph) { + SkASSERT(isPngGlyph(*glyph)); + SkASSERT(this->getDWriteTypeface()->fDWriteFontFace4); + + IDWriteFontFace4* fontFace4 = this->getDWriteTypeface()->fDWriteFontFace4.get(); + DWRITE_GLYPH_IMAGE_DATA glyphData; + void* glyphDataContext; + HRBM(fontFace4->GetGlyphImageData(glyph->getGlyphID(), + fTextSizeRender, + DWRITE_GLYPH_IMAGE_FORMATS_PNG, + &glyphData, + &glyphDataContext), + "Glyph image data could not be acquired."); + + Context* context = new Context(fontFace4, glyphDataContext); + sk_sp data = SkData::MakeWithProc(glyphData.imageData, + glyphData.imageDataSize, + &ReleaseProc, + context); + + std::unique_ptr codec = SkCodec::MakeFromData(std::move(data)); + if (!codec) { + return false; + } + + SkImageInfo info = codec->getInfo(); + SkRect bounds = SkRect::MakeLTRB(SkIntToScalar(info.bounds().fLeft), + SkIntToScalar(info.bounds().fTop), + SkIntToScalar(info.bounds().fRight), + SkIntToScalar(info.bounds().fBottom)); + + SkMatrix matrix = fSkXform; + SkScalar scale = fTextSizeRender / glyphData.pixelsPerEm; + matrix.preScale(scale, scale); + matrix.preTranslate(-glyphData.horizontalLeftOrigin.x, -glyphData.horizontalLeftOrigin.y); + if (this->isSubpixel()) { + matrix.postTranslate(SkFixedToScalar(glyph->getSubXFixed()), + SkFixedToScalar(glyph->getSubYFixed())); + } + matrix.mapRect(&bounds); + SetGlyphBounds(glyph, bounds); + return true; +} +#endif + +void SkScalerContext_DW::generateMetrics(SkGlyph* glyph, SkArenaAlloc* alloc) { + + // GetAlphaTextureBounds succeeds but sometimes returns empty bounds like + // { 0x80000000, 0x80000000, 0x80000000, 0x80000000 } + // for small but not quite zero and large (but not really large) glyphs, + // Only set as non-empty if the returned bounds are non-empty. + auto glyphCheckAndSetBounds = [](SkGlyph* glyph, const RECT& bbox) { + if (bbox.left >= bbox.right || bbox.top >= bbox.bottom) { + return false; + } + + // We're trying to pack left and top into int16_t, + // and width and height into uint16_t, after outsetting by 1. + if (!SkIRect::MakeXYWH(-32767, -32767, 65535, 65535).contains( + SkIRect::MakeLTRB(bbox.left, bbox.top, bbox.right, bbox.bottom))) { + return false; + } + + glyph->fWidth = SkToU16(bbox.right - bbox.left); + glyph->fHeight = SkToU16(bbox.bottom - bbox.top); + glyph->fLeft = SkToS16(bbox.left); + glyph->fTop = SkToS16(bbox.top); + return true; + }; + + glyph->fWidth = 0; + glyph->fHeight = 0; + glyph->fLeft = 0; + glyph->fTop = 0; + + if (!this->generateAdvance(glyph)) { + return; + } + + DWriteFontTypeface* typeface = this->getDWriteTypeface(); + if (typeface->fIsColorFont) { + if (isColorGlyph(*glyph) && generateColorMetrics(glyph)) { + glyph->fMaskFormat = SkMask::kARGB32_Format; + glyph->fScalerContextBits |= ScalerContextBits::COLR; + glyph->setPath(alloc, nullptr, false); + return; + } + +#ifdef USE_SVG + if (isSVGGlyph(*glyph) && generateSVGMetrics(glyph)) { + glyph->fMaskFormat = SkMask::kARGB32_Format; + glyph->fScalerContextBits |= ScalerContextBits::SVG; + glyph->setPath(alloc, nullptr, false); + return; + } +#endif + +#ifdef USE_PNG + if (isPngGlyph(*glyph) && generatePngMetrics(glyph)) { + glyph->fMaskFormat = SkMask::kARGB32_Format; + glyph->fScalerContextBits |= ScalerContextBits::PNG; + glyph->setPath(alloc, nullptr, false); + return; + } +#endif + } + + RECT bbox; + HRVM(this->getBoundingBox(glyph, fRenderingMode, fTextureType, &bbox), + "Requested bounding box could not be determined."); + + if (glyphCheckAndSetBounds(glyph, bbox)) { + return; + } + + // GetAlphaTextureBounds succeeds but returns an empty RECT if there are no + // glyphs of the specified texture type or it is too big for smoothing. + // When this happens, try with the alternate texture type. + if (DWRITE_TEXTURE_ALIASED_1x1 != fTextureType || + DWRITE_TEXT_ANTIALIAS_MODE_GRAYSCALE == fAntiAliasMode) + { + HRVM(this->getBoundingBox(glyph, + DWRITE_RENDERING_MODE_ALIASED, + DWRITE_TEXTURE_ALIASED_1x1, + &bbox), + "Fallback bounding box could not be determined."); + if (glyphCheckAndSetBounds(glyph, bbox)) { + glyph->fScalerContextBits |= ScalerContextBits::ForceBW; + glyph->fMaskFormat = SkMask::kBW_Format; + } + } + // TODO: handle the case where a request for DWRITE_TEXTURE_ALIASED_1x1 + // fails, and try DWRITE_TEXTURE_CLEARTYPE_3x1. + + // GetAlphaTextureBounds can fail for various reasons. As a fallback, attempt to generate the + // metrics from the path + SkDEBUGCODE(glyph->fAdvancesBoundsFormatAndInitialPathDone = true;) + this->getPath(*glyph, alloc); + const SkPath* devPath = glyph->path(); + if (devPath) { + // Sometimes all the above fails. If so, try to create the glyph from path. + const SkMask::Format format = glyph->maskFormat(); + const bool doVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); + const bool a8LCD = SkToBool(fRec.fFlags & SkScalerContext::kGenA8FromLCD_Flag); + const bool hairline = glyph->pathIsHairline(); + if (GenerateMetricsFromPath(glyph, *devPath, format, doVert, a8LCD, hairline)) { + glyph->fScalerContextBits |= ScalerContextBits::PATH; + } + } +} + +void SkScalerContext_DW::generateFontMetrics(SkFontMetrics* metrics) { + if (nullptr == metrics) { + return; + } + + sk_bzero(metrics, sizeof(*metrics)); + + DWRITE_FONT_METRICS dwfm; + if (DWRITE_MEASURING_MODE_GDI_CLASSIC == fMeasuringMode || + DWRITE_MEASURING_MODE_GDI_NATURAL == fMeasuringMode) + { + this->getDWriteTypeface()->fDWriteFontFace->GetGdiCompatibleMetrics( + fTextSizeRender, + 1.0f, // pixelsPerDip + &fXform, + &dwfm); + } else { + this->getDWriteTypeface()->fDWriteFontFace->GetMetrics(&dwfm); + } + + SkScalar upem = SkIntToScalar(dwfm.designUnitsPerEm); + + metrics->fAscent = -fTextSizeRender * SkIntToScalar(dwfm.ascent) / upem; + metrics->fDescent = fTextSizeRender * SkIntToScalar(dwfm.descent) / upem; + metrics->fLeading = fTextSizeRender * SkIntToScalar(dwfm.lineGap) / upem; + metrics->fXHeight = fTextSizeRender * SkIntToScalar(dwfm.xHeight) / upem; + metrics->fCapHeight = fTextSizeRender * SkIntToScalar(dwfm.capHeight) / upem; + metrics->fUnderlineThickness = fTextSizeRender * SkIntToScalar(dwfm.underlineThickness) / upem; + metrics->fUnderlinePosition = -(fTextSizeRender * SkIntToScalar(dwfm.underlinePosition) / upem); + metrics->fStrikeoutThickness = fTextSizeRender * SkIntToScalar(dwfm.strikethroughThickness) / upem; + metrics->fStrikeoutPosition = -(fTextSizeRender * SkIntToScalar(dwfm.strikethroughPosition) / upem); + + metrics->fFlags |= SkFontMetrics::kUnderlineThicknessIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kUnderlinePositionIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kStrikeoutThicknessIsValid_Flag; + metrics->fFlags |= SkFontMetrics::kStrikeoutPositionIsValid_Flag; + + SkTScopedComPtr fontFace5; + if (SUCCEEDED(this->getDWriteTypeface()->fDWriteFontFace->QueryInterface(&fontFace5))) { + if (fontFace5->HasVariations()) { + // The bounds are only valid for the default variation. + metrics->fFlags |= SkFontMetrics::kBoundsInvalid_Flag; + } + } + + if (this->getDWriteTypeface()->fDWriteFontFace1.get()) { + DWRITE_FONT_METRICS1 dwfm1; + this->getDWriteTypeface()->fDWriteFontFace1->GetMetrics(&dwfm1); + metrics->fTop = -fTextSizeRender * SkIntToScalar(dwfm1.glyphBoxTop) / upem; + metrics->fBottom = -fTextSizeRender * SkIntToScalar(dwfm1.glyphBoxBottom) / upem; + metrics->fXMin = fTextSizeRender * SkIntToScalar(dwfm1.glyphBoxLeft) / upem; + metrics->fXMax = fTextSizeRender * SkIntToScalar(dwfm1.glyphBoxRight) / upem; + + metrics->fMaxCharWidth = metrics->fXMax - metrics->fXMin; + return; + } + + AutoTDWriteTable head(this->getDWriteTypeface()->fDWriteFontFace.get()); + if (head.fExists && + head.fSize >= sizeof(SkOTTableHead) && + head->version == SkOTTableHead::version1) + { + metrics->fTop = -fTextSizeRender * (int16_t)SkEndian_SwapBE16(head->yMax) / upem; + metrics->fBottom = -fTextSizeRender * (int16_t)SkEndian_SwapBE16(head->yMin) / upem; + metrics->fXMin = fTextSizeRender * (int16_t)SkEndian_SwapBE16(head->xMin) / upem; + metrics->fXMax = fTextSizeRender * (int16_t)SkEndian_SwapBE16(head->xMax) / upem; + + metrics->fMaxCharWidth = metrics->fXMax - metrics->fXMin; + return; + } + + // The real bounds weren't actually available. + metrics->fFlags |= SkFontMetrics::kBoundsInvalid_Flag; + metrics->fTop = metrics->fAscent; + metrics->fBottom = metrics->fDescent; +} + +/////////////////////////////////////////////////////////////////////////////// + +#include "include/private/SkColorData.h" + +void SkScalerContext_DW::BilevelToBW(const uint8_t* SK_RESTRICT src, const SkGlyph& glyph) { + const int width = glyph.width(); + const size_t dstRB = (width + 7) >> 3; + uint8_t* SK_RESTRICT dst = static_cast(glyph.fImage); + + int byteCount = width >> 3; + int bitCount = width & 7; + + for (int y = 0; y < glyph.height(); ++y) { + if (byteCount > 0) { + for (int i = 0; i < byteCount; ++i) { + unsigned byte = 0; + byte |= src[0] & (1 << 7); + byte |= src[1] & (1 << 6); + byte |= src[2] & (1 << 5); + byte |= src[3] & (1 << 4); + byte |= src[4] & (1 << 3); + byte |= src[5] & (1 << 2); + byte |= src[6] & (1 << 1); + byte |= src[7] & (1 << 0); + dst[i] = byte; + src += 8; + } + } + if (bitCount > 0) { + unsigned byte = 0; + unsigned mask = 0x80; + for (int i = 0; i < bitCount; i++) { + byte |= (src[i]) & mask; + mask >>= 1; + } + dst[byteCount] = byte; + } + src += bitCount; + dst += dstRB; + } + + if constexpr (kSkShowTextBlitCoverage) { + dst = static_cast(glyph.fImage); + for (unsigned y = 0; y < (unsigned)glyph.height(); y += 2) { + for (unsigned x = (y & 0x2); x < (unsigned)glyph.width(); x+=4) { + uint8_t& b = dst[(dstRB * y) + (x >> 3)]; + b = b ^ (1 << (0x7 - (x & 0x7))); + } + } + } +} + +template +void SkScalerContext_DW::GrayscaleToA8(const uint8_t* SK_RESTRICT src, + const SkGlyph& glyph, + const uint8_t* table8) { + const size_t dstRB = glyph.rowBytes(); + const int width = glyph.width(); + uint8_t* SK_RESTRICT dst = static_cast(glyph.fImage); + + for (int y = 0; y < glyph.height(); y++) { + for (int i = 0; i < width; i++) { + U8CPU a = *(src++); + dst[i] = sk_apply_lut_if(a, table8); + if constexpr (kSkShowTextBlitCoverage) { + dst[i] = std::max(0x30, dst[i]); + } + } + dst = SkTAddOffset(dst, dstRB); + } +} + +template +void SkScalerContext_DW::RGBToA8(const uint8_t* SK_RESTRICT src, + const SkGlyph& glyph, + const uint8_t* table8) { + const size_t dstRB = glyph.rowBytes(); + const int width = glyph.width(); + uint8_t* SK_RESTRICT dst = static_cast(glyph.fImage); + + for (int y = 0; y < glyph.height(); y++) { + for (int i = 0; i < width; i++) { + // Ignore the R, B channels. It looks the closest to what + // D2D with grayscale AA has. But there's no way + // to just get a grayscale AA alpha texture from a glyph run. + U8CPU g = src[1]; + src += 3; + + dst[i] = sk_apply_lut_if(g, table8); + if constexpr (kSkShowTextBlitCoverage) { + dst[i] = std::max(0x30, dst[i]); + } + } + dst = SkTAddOffset(dst, dstRB); + } +} + +template +void SkScalerContext_DW::RGBToLcd16(const uint8_t* SK_RESTRICT src, const SkGlyph& glyph, + const uint8_t* tableR, const uint8_t* tableG, + const uint8_t* tableB, int clearTypeLevel) { + const size_t dstRB = glyph.rowBytes(); + const int width = glyph.width(); + uint16_t* SK_RESTRICT dst = static_cast(glyph.fImage); + + for (int y = 0; y < glyph.height(); y++) { + for (int i = 0; i < width; i++) { + int r, g, b; + if (RGB) { + r = sk_apply_lut_if(*(src++), tableR); + g = sk_apply_lut_if(*(src++), tableG); + b = sk_apply_lut_if(*(src++), tableB); + } else { + b = sk_apply_lut_if(*(src++), tableB); + g = sk_apply_lut_if(*(src++), tableG); + r = sk_apply_lut_if(*(src++), tableR); + } + if constexpr (kSkShowTextBlitCoverage) { + r = std::max(0x30, r); + g = std::max(0x30, g); + b = std::max(0x30, b); + } + r = g + (((r - g) * clearTypeLevel) >> 8); + b = g + (((b - g) * clearTypeLevel) >> 8); + dst[i] = SkPack888ToRGB16(r, g, b); + } + dst = SkTAddOffset(dst, dstRB); + } +} + +const void* SkScalerContext_DW::drawDWMask(const SkGlyph& glyph, + DWRITE_RENDERING_MODE renderingMode, + DWRITE_TEXTURE_TYPE textureType) +{ + DWriteFontTypeface* typeface = this->getDWriteTypeface(); + + int sizeNeeded = glyph.width() * glyph.height(); + if (DWRITE_TEXTURE_CLEARTYPE_3x1 == textureType) { + sizeNeeded *= 3; + } + if (sizeNeeded > fBits.size()) { + fBits.resize(sizeNeeded); + } + + // erase + memset(fBits.begin(), 0, sizeNeeded); + + fXform.dx = SkFixedToFloat(glyph.getSubXFixed()); + fXform.dy = SkFixedToFloat(glyph.getSubYFixed()); + + FLOAT advance = 0.0f; + + UINT16 index = glyph.getGlyphID(); + + DWRITE_GLYPH_OFFSET offset; + offset.advanceOffset = 0.0f; + offset.ascenderOffset = 0.0f; + + DWRITE_GLYPH_RUN run; + run.glyphCount = 1; + run.glyphAdvances = &advance; + run.fontFace = this->getDWriteTypeface()->fDWriteFontFace.get(); + run.fontEmSize = SkScalarToFloat(fTextSizeRender); + run.bidiLevel = 0; + run.glyphIndices = &index; + run.isSideways = FALSE; + run.glyphOffsets = &offset; + { + SkTScopedComPtr glyphRunAnalysis; + { + Exclusive l(maybe_dw_mutex(*typeface)); + // IDWriteFactory2::CreateGlyphRunAnalysis is very bad at aliased glyphs. + if (this->getDWriteTypeface()->fFactory2 && + (fGridFitMode == DWRITE_GRID_FIT_MODE_DISABLED || + fAntiAliasMode == DWRITE_TEXT_ANTIALIAS_MODE_GRAYSCALE)) + { + HRNM(this->getDWriteTypeface()->fFactory2->CreateGlyphRunAnalysis(&run, + &fXform, + renderingMode, + fMeasuringMode, + fGridFitMode, + fAntiAliasMode, + 0.0f, // baselineOriginX, + 0.0f, // baselineOriginY, + &glyphRunAnalysis), + "Could not create DW2 glyph run analysis."); + } else { + HRNM(this->getDWriteTypeface()->fFactory->CreateGlyphRunAnalysis(&run, + 1.0f, // pixelsPerDip, + &fXform, + renderingMode, + fMeasuringMode, + 0.0f, // baselineOriginX, + 0.0f, // baselineOriginY, + &glyphRunAnalysis), + "Could not create glyph run analysis."); + } + } + //NOTE: this assumes that the glyph has already been measured + //with an exact same glyph run analysis. + RECT bbox; + bbox.left = glyph.left(); + bbox.top = glyph.top(); + bbox.right = glyph.left() + glyph.width(); + bbox.bottom = glyph.top() + glyph.height(); + { + Shared l(maybe_dw_mutex(*typeface)); + HRNM(glyphRunAnalysis->CreateAlphaTexture(textureType, + &bbox, + fBits.begin(), + sizeNeeded), + "Could not draw mask."); + } + } + return fBits.begin(); +} + +bool SkScalerContext_DW::drawColorGlyphImage(const SkGlyph& glyph, SkCanvas& canvas) { + SkTScopedComPtr colorLayers; + if (!getColorGlyphRun(glyph, &colorLayers)) { + SkASSERTF(false, "Could not get color layers"); + return false; + } + + SkPaint paint; + paint.setAntiAlias(fRenderingMode != DWRITE_RENDERING_MODE_ALIASED); + + if (this->isSubpixel()) { + canvas.translate(SkFixedToScalar(glyph.getSubXFixed()), + SkFixedToScalar(glyph.getSubYFixed())); + } + canvas.concat(fSkXform); + + DWriteFontTypeface* typeface = this->getDWriteTypeface(); + size_t paletteEntryCount = typeface->fPaletteEntryCount; + SkColor* palette = typeface->fPalette.get(); + BOOL hasNextRun = FALSE; + while (SUCCEEDED(colorLayers->MoveNext(&hasNextRun)) && hasNextRun) { + const DWRITE_COLOR_GLYPH_RUN* colorGlyph; + HRBM(colorLayers->GetCurrentRun(&colorGlyph), "Could not get current color glyph run"); + + SkColor color; + if (colorGlyph->paletteIndex == 0xffff) { + color = fRec.fForegroundColor; + } else if (colorGlyph->paletteIndex < paletteEntryCount) { + color = palette[colorGlyph->paletteIndex]; + } else { + SK_TRACEHR(DWRITE_E_NOCOLOR, "Invalid palette index."); + color = SK_ColorBLACK; + } + paint.setColor(color); + + SkPath path; + SkTScopedComPtr geometryToPath; + HRBM(SkDWriteGeometrySink::Create(&path, &geometryToPath), + "Could not create geometry to path converter."); + { + Exclusive l(maybe_dw_mutex(*this->getDWriteTypeface())); + HRBM(colorGlyph->glyphRun.fontFace->GetGlyphRunOutline( + colorGlyph->glyphRun.fontEmSize, + colorGlyph->glyphRun.glyphIndices, + colorGlyph->glyphRun.glyphAdvances, + colorGlyph->glyphRun.glyphOffsets, + colorGlyph->glyphRun.glyphCount, + colorGlyph->glyphRun.isSideways, + colorGlyph->glyphRun.bidiLevel % 2, //rtl + geometryToPath.get()), + "Could not create glyph outline."); + } + canvas.drawPath(path, paint); + } + return true; +} + +bool SkScalerContext_DW::generateColorGlyphImage(const SkGlyph& glyph) { + SkASSERT(isColorGlyph(glyph)); + SkASSERT(glyph.fMaskFormat == SkMask::Format::kARGB32_Format); + + SkBitmap dstBitmap; + // TODO: mark this as sRGB when the blits will be sRGB. + dstBitmap.setInfo(SkImageInfo::Make(glyph.fWidth, glyph.fHeight, + kN32_SkColorType, kPremul_SkAlphaType), + glyph.rowBytes()); + dstBitmap.setPixels(glyph.fImage); + + SkCanvas canvas(dstBitmap); + if constexpr (kSkShowTextBlitCoverage) { + canvas.clear(0x33FF0000); + } else { + canvas.clear(SK_ColorTRANSPARENT); + } + canvas.translate(-SkIntToScalar(glyph.fLeft), -SkIntToScalar(glyph.fTop)); + + return this->drawColorGlyphImage(glyph, canvas); +} + +bool SkScalerContext_DW::drawSVGGlyphImage(const SkGlyph& glyph, SkCanvas& canvas) { + SkASSERT(isSVGGlyph(glyph)); + SkASSERT(this->getDWriteTypeface()->fDWriteFontFace4); + + SkGraphics::OpenTypeSVGDecoderFactory svgFactory = SkGraphics::GetOpenTypeSVGDecoderFactory(); + if (!svgFactory) { + return false; + } + + DWriteFontTypeface* typeface = this->getDWriteTypeface(); + IDWriteFontFace4* fontFace4 = typeface->fDWriteFontFace4.get(); + DWRITE_GLYPH_IMAGE_DATA glyphData; + void* glyphDataContext; + HRBM(fontFace4->GetGlyphImageData(glyph.getGlyphID(), + fTextSizeRender, + DWRITE_GLYPH_IMAGE_FORMATS_SVG, + &glyphData, + &glyphDataContext), + "Glyph SVG data could not be acquired."); + auto svgDecoder = svgFactory((const uint8_t*)glyphData.imageData, glyphData.imageDataSize); + fontFace4->ReleaseGlyphImageData(glyphDataContext); + if (!svgDecoder) { + return false; + } + + size_t paletteEntryCount = typeface->fPaletteEntryCount; + SkColor* palette = typeface->fPalette.get(); + int upem = typeface->getUnitsPerEm(); + + SkMatrix matrix = fSkXform; + SkScalar scale = fTextSizeRender / upem; + matrix.preScale(scale, scale); + matrix.preTranslate(-glyphData.horizontalLeftOrigin.x, -glyphData.horizontalLeftOrigin.y); + if (this->isSubpixel()) { + matrix.postTranslate(SkFixedToScalar(glyph.getSubXFixed()), + SkFixedToScalar(glyph.getSubYFixed())); + } + canvas.concat(matrix); + + return svgDecoder->render(canvas, upem, glyph.getGlyphID(), + fRec.fForegroundColor, SkSpan(palette, paletteEntryCount)); +} + +bool SkScalerContext_DW::generateSVGGlyphImage(const SkGlyph& glyph) { + SkASSERT(isSVGGlyph(glyph)); + SkASSERT(glyph.fMaskFormat == SkMask::Format::kARGB32_Format); + + SkBitmap dstBitmap; + // TODO: mark this as sRGB when the blits will be sRGB. + dstBitmap.setInfo(SkImageInfo::Make(glyph.fWidth, glyph.fHeight, + kN32_SkColorType, kPremul_SkAlphaType), + glyph.rowBytes()); + dstBitmap.setPixels(glyph.fImage); + + SkCanvas canvas(dstBitmap); + if constexpr (kSkShowTextBlitCoverage) { + canvas.clear(0x33FF0000); + } else { + canvas.clear(SK_ColorTRANSPARENT); + } + canvas.translate(-SkIntToScalar(glyph.fLeft), -SkIntToScalar(glyph.fTop)); + + return this->drawSVGGlyphImage(glyph, canvas); +} + +#ifdef USE_PNG +bool SkScalerContext_DW::drawPngGlyphImage(const SkGlyph& glyph, SkCanvas& canvas) { + IDWriteFontFace4* fontFace4 = this->getDWriteTypeface()->fDWriteFontFace4.get(); + DWRITE_GLYPH_IMAGE_DATA glyphData; + void* glyphDataContext; + HRBM(fontFace4->GetGlyphImageData(glyph.getGlyphID(), + fTextSizeRender, + DWRITE_GLYPH_IMAGE_FORMATS_PNG, + &glyphData, + &glyphDataContext), + "Glyph image data could not be acquired."); + Context* context = new Context(fontFace4, glyphDataContext); + sk_sp data = SkData::MakeWithProc(glyphData.imageData, + glyphData.imageDataSize, + &ReleaseProc, + context); + sk_sp image = SkImage::MakeFromEncoded(std::move(data)); + if (!image) { + return false; + } + + if (this->isSubpixel()) { + canvas.translate(SkFixedToScalar(glyph.getSubXFixed()), + SkFixedToScalar(glyph.getSubYFixed())); + } + canvas.concat(fSkXform); + SkScalar ratio = fTextSizeRender / glyphData.pixelsPerEm; + canvas.scale(ratio, ratio); + canvas.translate(-glyphData.horizontalLeftOrigin.x, -glyphData.horizontalLeftOrigin.y); + canvas.drawImage(image, 0, 0); + return true; +} + +bool SkScalerContext_DW::generatePngGlyphImage(const SkGlyph& glyph) { + SkASSERT(isPngGlyph(glyph)); + SkASSERT(glyph.fMaskFormat == SkMask::Format::kARGB32_Format); + SkASSERT(this->getDWriteTypeface()->fDWriteFontFace4); + + SkBitmap dstBitmap; + dstBitmap.setInfo(SkImageInfo::Make(glyph.width(), glyph.height(), + kN32_SkColorType, kPremul_SkAlphaType), + glyph.rowBytes()); + dstBitmap.setPixels(glyph.fImage); + + SkCanvas canvas(dstBitmap); + canvas.clear(SK_ColorTRANSPARENT); + canvas.translate(-glyph.left(), -glyph.top()); + + return this->drawPngGlyphImage(glyph, canvas); +} +#endif + +void SkScalerContext_DW::generateImage(const SkGlyph& glyph) { + ScalerContextBits::value_type format = glyph.fScalerContextBits & ScalerContextBits::FormatMask; + if (format == ScalerContextBits::COLR) { + this->generateColorGlyphImage(glyph); + return; + } +#ifdef USE_SVG + if (format == ScalerContextBits::SVG) { + this->generateSVGGlyphImage(glyph); + return; + } +#endif +#ifdef USE_PNG + if (format == ScalerContextBits::PNG) { + this->generatePngGlyphImage(glyph); + return; + } +#endif + if (format == ScalerContextBits::PATH) { + const SkPath* devPath = glyph.path(); + SkASSERT_RELEASE(devPath); + SkMask mask = glyph.mask(); + SkASSERT(SkMask::kARGB32_Format != mask.fFormat); + const bool doBGR = SkToBool(fRec.fFlags & SkScalerContext::kLCD_BGROrder_Flag); + const bool doVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); + const bool a8LCD = SkToBool(fRec.fFlags & SkScalerContext::kGenA8FromLCD_Flag); + const bool hairline = glyph.pathIsHairline(); + GenerateImageFromPath(mask, *devPath, fPreBlend, doBGR, doVert, a8LCD, hairline); + return; + } + + //Create the mask. + DWRITE_RENDERING_MODE renderingMode = fRenderingMode; + DWRITE_TEXTURE_TYPE textureType = fTextureType; + if (glyph.fScalerContextBits & ScalerContextBits::ForceBW) { + renderingMode = DWRITE_RENDERING_MODE_ALIASED; + textureType = DWRITE_TEXTURE_ALIASED_1x1; + } + const void* bits = this->drawDWMask(glyph, renderingMode, textureType); + if (!bits) { + sk_bzero(glyph.fImage, glyph.imageSize()); + return; + } + + //Copy the mask into the glyph. + const uint8_t* src = (const uint8_t*)bits; + if (DWRITE_RENDERING_MODE_ALIASED == renderingMode) { + SkASSERT(SkMask::kBW_Format == glyph.fMaskFormat); + SkASSERT(DWRITE_TEXTURE_ALIASED_1x1 == textureType); + BilevelToBW(src, glyph); + } else if (!isLCD(fRec)) { + if (textureType == DWRITE_TEXTURE_ALIASED_1x1) { + if (fPreBlend.isApplicable()) { + GrayscaleToA8(src, glyph, fPreBlend.fG); + } else { + GrayscaleToA8(src, glyph, fPreBlend.fG); + } + } else { + if (fPreBlend.isApplicable()) { + RGBToA8(src, glyph, fPreBlend.fG); + } else { + RGBToA8(src, glyph, fPreBlend.fG); + } + } + } else { + SkASSERT(SkMask::kLCD16_Format == glyph.fMaskFormat); + if (fPreBlend.isApplicable()) { + if (fRec.fFlags & SkScalerContext::kLCD_BGROrder_Flag) { + RGBToLcd16(src, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB, fClearTypeLevel); + } else { + RGBToLcd16(src, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB, fClearTypeLevel); + } + } else { + if (fRec.fFlags & SkScalerContext::kLCD_BGROrder_Flag) { + RGBToLcd16(src, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB, fClearTypeLevel); + } else { + RGBToLcd16(src, glyph, fPreBlend.fR, fPreBlend.fG, fPreBlend.fB, fClearTypeLevel); + } + } + } +} + +bool SkScalerContext_DW::generatePath(const SkGlyph& glyph, SkPath* path) { + SkASSERT(path); + path->reset(); + + SkGlyphID glyphID = glyph.getGlyphID(); + + // DirectWrite treats all out of bounds glyph ids as having the same data as glyph 0. + // For consistency with all other backends, treat out of range glyph ids as an error. + if (fGlyphCount <= glyphID) { + return false; + } + + SkTScopedComPtr geometryToPath; + HRBM(SkDWriteGeometrySink::Create(path, &geometryToPath), + "Could not create geometry to path converter."); + UINT16 glyphId = SkTo(glyphID); + { + Exclusive l(maybe_dw_mutex(*this->getDWriteTypeface())); + //TODO: convert to<->from DIUs? This would make a difference if hinting. + //It may not be needed, it appears that DirectWrite only hints at em size. + HRBM(this->getDWriteTypeface()->fDWriteFontFace->GetGlyphRunOutline( + SkScalarToFloat(fTextSizeRender), + &glyphId, + nullptr, //advances + nullptr, //offsets + 1, //num glyphs + FALSE, //sideways + FALSE, //rtl + geometryToPath.get()), + "Could not create glyph outline."); + } + + path->transform(fSkXform); + return true; +} + +sk_sp SkScalerContext_DW::generateDrawable(const SkGlyph& glyph) { + struct GlyphDrawable : public SkDrawable { + SkScalerContext_DW* fSelf; + SkGlyph fGlyph; + GlyphDrawable(SkScalerContext_DW* self, const SkGlyph& glyph) : fSelf(self), fGlyph(glyph){} + SkRect onGetBounds() override { return fGlyph.rect(); } + size_t onApproximateBytesUsed() override { return sizeof(GlyphDrawable); } + void maybeShowTextBlitCoverage(SkCanvas* canvas) { + if constexpr (kSkShowTextBlitCoverage) { + SkPaint paint; + paint.setColor(0x3300FF00); + paint.setStyle(SkPaint::kFill_Style); + canvas->drawRect(this->onGetBounds(), paint); + } + } + }; + struct COLRGlyphDrawable : public GlyphDrawable { + using GlyphDrawable::GlyphDrawable; + void onDraw(SkCanvas* canvas) override { + this->maybeShowTextBlitCoverage(canvas); + fSelf->drawColorGlyphImage(fGlyph, *canvas); + } + }; + struct SVGGlyphDrawable : public GlyphDrawable { + using GlyphDrawable::GlyphDrawable; + void onDraw(SkCanvas* canvas) override { + this->maybeShowTextBlitCoverage(canvas); + fSelf->drawSVGGlyphImage(fGlyph, *canvas); + } + }; + ScalerContextBits::value_type format = glyph.fScalerContextBits & ScalerContextBits::FormatMask; + if (format == ScalerContextBits::COLR) { + return sk_sp(new COLRGlyphDrawable(this, glyph)); + } + if (format == ScalerContextBits::SVG) { + return sk_sp(new SVGGlyphDrawable(this, glyph)); + } + return nullptr; +} + +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkScalerContext_win_dw.h b/gfx/skia/skia/src/ports/SkScalerContext_win_dw.h new file mode 100644 index 0000000000..7cc59969bb --- /dev/null +++ b/gfx/skia/skia/src/ports/SkScalerContext_win_dw.h @@ -0,0 +1,117 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkScalarContext_win_dw_DEFINED +#define SkScalarContext_win_dw_DEFINED + +#include "include/core/SkScalar.h" +#include "include/core/SkTypes.h" +#include "include/private/base/SkTDArray.h" +#include "src/core/SkScalerContext.h" +#include "src/ports/SkTypeface_win_dw.h" + +#include +#include + +class SkGlyph; +class SkDescriptor; + +class SkScalerContext_DW : public SkScalerContext { +public: + SkScalerContext_DW(sk_sp, + const SkScalerContextEffects&, + const SkDescriptor*); + ~SkScalerContext_DW() override; + +protected: + bool generateAdvance(SkGlyph* glyph) override; + void generateMetrics(SkGlyph* glyph, SkArenaAlloc*) override; + void generateImage(const SkGlyph& glyph) override; + bool generatePath(const SkGlyph&, SkPath*) override; + sk_sp generateDrawable(const SkGlyph&) override; + void generateFontMetrics(SkFontMetrics*) override; + +private: + struct ScalerContextBits { + using value_type = decltype(SkGlyph::fScalerContextBits); + static const constexpr value_type ForceBW = 1 << 0; + + static const constexpr value_type DW = 0 << 1; + static const constexpr value_type PNG = 1 << 1; + static const constexpr value_type SVG = 2 << 1; + static const constexpr value_type COLR = 3 << 1; + static const constexpr value_type PATH = 4 << 1; + static const constexpr value_type FormatMask = 0x7 << 1; + }; + + static void BilevelToBW(const uint8_t* SK_RESTRICT src, const SkGlyph& glyph); + + template + static void GrayscaleToA8(const uint8_t* SK_RESTRICT src, + const SkGlyph& glyph, + const uint8_t* table8); + + template + static void RGBToA8(const uint8_t* SK_RESTRICT src, + const SkGlyph& glyph, + const uint8_t* table8); + + template + static void RGBToLcd16(const uint8_t* SK_RESTRICT src, const SkGlyph& glyph, + const uint8_t* tableR, const uint8_t* tableG, const uint8_t* tableB, + int clearTypeLevel); + + const void* drawDWMask(const SkGlyph& glyph, + DWRITE_RENDERING_MODE renderingMode, + DWRITE_TEXTURE_TYPE textureType); + + HRESULT getBoundingBox(SkGlyph* glyph, + DWRITE_RENDERING_MODE renderingMode, + DWRITE_TEXTURE_TYPE textureType, + RECT* bbox); + + DWriteFontTypeface* getDWriteTypeface() { + return static_cast(this->getTypeface()); + } + + bool isColorGlyph(const SkGlyph&); + bool getColorGlyphRun(const SkGlyph&, IDWriteColorGlyphRunEnumerator**); + bool generateColorMetrics(SkGlyph*); + bool generateColorGlyphImage(const SkGlyph&); + bool drawColorGlyphImage(const SkGlyph&, SkCanvas&); + + bool isSVGGlyph(const SkGlyph&); + bool generateSVGMetrics(SkGlyph*); + bool generateSVGGlyphImage(const SkGlyph&); + bool drawSVGGlyphImage(const SkGlyph&, SkCanvas&); + + bool isPngGlyph(const SkGlyph&); + bool generatePngMetrics(SkGlyph*); + bool generatePngGlyphImage(const SkGlyph&); + bool drawPngGlyphImage(const SkGlyph&, SkCanvas&); + + static void SetGlyphBounds(SkGlyph* glyph, const SkRect& bounds); + + SkTDArray fBits; + /** The total matrix without the text height scale. */ + SkMatrix fSkXform; + /** The total matrix without the text height scale. */ + DWRITE_MATRIX fXform; + /** The text size to render with. */ + SkScalar fTextSizeRender; + /** The text size to measure with. */ + SkScalar fTextSizeMeasure; + int fGlyphCount; + DWRITE_RENDERING_MODE fRenderingMode; + DWRITE_TEXTURE_TYPE fTextureType; + DWRITE_MEASURING_MODE fMeasuringMode; + DWRITE_TEXT_ANTIALIAS_MODE fAntiAliasMode; + DWRITE_GRID_FIT_MODE fGridFitMode; + int fClearTypeLevel; +}; + +#endif diff --git a/gfx/skia/skia/src/ports/SkTypeface_mac_ct.cpp b/gfx/skia/skia/src/ports/SkTypeface_mac_ct.cpp new file mode 100644 index 0000000000..da45a3b547 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkTypeface_mac_ct.cpp @@ -0,0 +1,1541 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#ifdef SK_BUILD_FOR_MAC +#import +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#include +#include +#include +#endif + +#include "include/core/SkColor.h" +#include "include/core/SkData.h" +#include "include/core/SkFontArguments.h" +#include "include/core/SkFontParameters.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkFontTypes.h" +#include "include/core/SkRect.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStream.h" +#include "include/core/SkString.h" +#include "include/core/SkTypeface.h" +#include "include/ports/SkTypeface_mac.h" +#include "include/private/base/SkFixed.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkMutex.h" +#include "include/private/base/SkOnce.h" +#include "include/private/base/SkTDArray.h" +#include "include/private/base/SkTPin.h" +#include "include/private/base/SkTemplates.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkEndian.h" +#include "src/base/SkUTF.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkMask.h" +#include "src/core/SkScalerContext.h" +#include "src/core/SkTypefaceCache.h" +#include "src/ports/SkScalerContext_mac_ct.h" +#include "src/ports/SkTypeface_mac_ct.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_OS_2.h" +#include "src/sfnt/SkOTTable_OS_2_V4.h" +#include "src/sfnt/SkOTUtils.h" +#include "src/sfnt/SkSFNTHeader.h" +#include "src/utils/mac/SkCGBase.h" +#include "src/utils/mac/SkCGGeometry.h" +#include "src/utils/mac/SkCTFont.h" +#include "src/utils/mac/SkUniqueCFRef.h" + +#include +#include +#include +#include + +using namespace skia_private; + +/** Assumes src and dst are not nullptr. */ +void SkStringFromCFString(CFStringRef src, SkString* dst) { + // Reserve enough room for the worst-case string, + // plus 1 byte for the trailing null. + CFIndex length = CFStringGetMaximumSizeForEncoding(CFStringGetLength(src), + kCFStringEncodingUTF8) + 1; + dst->resize(length); + CFStringGetCString(src, dst->data(), length, kCFStringEncodingUTF8); + // Resize to the actual UTF-8 length used, stripping the null character. + dst->resize(strlen(dst->c_str())); +} + +SkString SkCFTypeIDDescription(CFTypeID id) { + SkUniqueCFRef typeDescription(CFCopyTypeIDDescription(id)); + SkString skTypeDescription; + SkStringFromCFString(typeDescription.get(), &skTypeDescription); + return skTypeDescription; +} + +template CFTypeID SkCFGetTypeID(); +#define SK_GETCFTYPEID(cf) \ +template<> CFTypeID SkCFGetTypeID() { return cf##GetTypeID(); } +SK_GETCFTYPEID(CFBoolean); +SK_GETCFTYPEID(CFDictionary); +SK_GETCFTYPEID(CFNumber); + +/* Checked dynamic downcast of CFTypeRef. + * + * @param cf the ref to downcast. + * @param cfAsCF if cf can be cast to the type CF, receives the downcast ref. + * @param name if non-nullptr the cast is expected to succeed and failures will be logged. + * @return true if the cast succeeds, false otherwise. + */ +template +static bool SkCFDynamicCast(CFTypeRef cf, CF* cfAsCF, char const* name) { + //SkDEBUGF("SkCFDynamicCast '%s' of type %s to type %s\n", name ? name : "", + // SkCFTypeIDDescription( CFGetTypeID(cf) ).c_str() + // SkCFTypeIDDescription(SkCFGetTypeID()).c_str()); + if (!cf) { + if (name) { + SkDEBUGF("%s not present\n", name); + } + return false; + } + if (CFGetTypeID(cf) != SkCFGetTypeID()) { + if (name) { + SkDEBUGF("%s is a %s but expected a %s\n", name, + SkCFTypeIDDescription( CFGetTypeID(cf) ).c_str(), + SkCFTypeIDDescription(SkCFGetTypeID()).c_str()); + } + return false; + } + *cfAsCF = static_cast(cf); + return true; +} + +template struct SkCFNumberTypeFor {}; +#define SK_CFNUMBERTYPE_FOR(c, cf) \ +template<> struct SkCFNumberTypeFor : std::integral_constant {}; +SK_CFNUMBERTYPE_FOR(char , kCFNumberCharType ); +SK_CFNUMBERTYPE_FOR(short , kCFNumberShortType ); +SK_CFNUMBERTYPE_FOR(int , kCFNumberIntType ); +SK_CFNUMBERTYPE_FOR(long , kCFNumberLongType ); +SK_CFNUMBERTYPE_FOR(long long, kCFNumberLongLongType); +SK_CFNUMBERTYPE_FOR(float , kCFNumberFloatType ); +SK_CFNUMBERTYPE_FOR(double , kCFNumberDoubleType ); + +template +static bool SkCFNumberDynamicCast(CFTypeRef cf, T* number, CFNumberRef* cfNumber, char const* name){ + CFNumberRef cfAsCFNumber; + if (!SkCFDynamicCast(cf, &cfAsCFNumber, name)) { + return false; + } + if (!CFNumberGetValue(cfAsCFNumber, SkCFNumberTypeFor::value, number)) { + if (name) { + SkDEBUGF("%s CFNumber not extractable\n", name); + } + return false; + } + if (cfNumber) { + *cfNumber = cfAsCFNumber; + } + return true; +} + +// In macOS 10.12 and later any variation on the CGFont which has default axis value will be +// dropped when creating the CTFont. Unfortunately, in macOS 10.15 the priority of setting +// the optical size (and opsz variation) is +// 1. the value of kCTFontOpticalSizeAttribute in the CTFontDescriptor (undocumented) +// 2. the opsz axis default value if kCTFontOpticalSizeAttribute is 'none' (undocumented) +// 3. the opsz variation on the nascent CTFont from the CGFont (was dropped if default) +// 4. the opsz variation in kCTFontVariationAttribute in CTFontDescriptor (crashes 10.10) +// 5. the size requested (can fudge in SkTypeface but not SkScalerContext) +// The first one which is found will be used to set the opsz variation (after clamping). +static void add_opsz_attr(CFMutableDictionaryRef attr, double opsz) { + SkUniqueCFRef opszValueNumber( + CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, &opsz)); + // Avoid using kCTFontOpticalSizeAttribute directly + CFStringRef SkCTFontOpticalSizeAttribute = CFSTR("NSCTFontOpticalSizeAttribute"); + CFDictionarySetValue(attr, SkCTFontOpticalSizeAttribute, opszValueNumber.get()); +} + +// This turns off application of the 'trak' table to advances, but also all other tracking. +static void add_notrak_attr(CFMutableDictionaryRef attr) { + int zero = 0; + SkUniqueCFRef unscaledTrackingNumber( + CFNumberCreate(kCFAllocatorDefault, kCFNumberIntType, &zero)); + CFStringRef SkCTFontUnscaledTrackingAttribute = CFSTR("NSCTFontUnscaledTrackingAttribute"); + CFDictionarySetValue(attr, SkCTFontUnscaledTrackingAttribute, unscaledTrackingNumber.get()); +} + +SkUniqueCFRef SkCTFontCreateExactCopy(CTFontRef baseFont, CGFloat textSize, + OpszVariation opszVariation) +{ + SkUniqueCFRef attr( + CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + + if (opszVariation.isSet) { + add_opsz_attr(attr.get(), opszVariation.value); +#ifdef MOZ_SKIA + } +#else + } else { + // On (at least) 10.10 though 10.14 the default system font was SFNSText/SFNSDisplay. + // The CTFont is backed by both; optical size < 20 means SFNSText else SFNSDisplay. + // On at least 10.11 the glyph ids in these fonts became non-interchangable. + // To keep glyph ids stable over size changes, preserve the optical size. + // In 10.15 this was replaced with use of variable fonts with an opsz axis. + // A CTFont backed by multiple fonts picked by opsz where the multiple backing fonts are + // variable fonts with opsz axis and non-interchangeable glyph ids would break the + // opsz.isSet branch above, but hopefully that never happens. + // See https://crbug.com/524646 . + CFStringRef SkCTFontOpticalSizeAttribute = CFSTR("NSCTFontOpticalSizeAttribute"); + SkUniqueCFRef opsz(CTFontCopyAttribute(baseFont, SkCTFontOpticalSizeAttribute)); + double opsz_val; + if (!opsz || + CFGetTypeID(opsz.get()) != CFNumberGetTypeID() || + !CFNumberGetValue(static_cast(opsz.get()),kCFNumberDoubleType,&opsz_val) || + opsz_val <= 0) + { + opsz_val = CTFontGetSize(baseFont); + } + add_opsz_attr(attr.get(), opsz_val); + } + add_notrak_attr(attr.get()); +#endif + + // To figure out if a font is installed locally or used from a @font-face + // resource, we check whether its descriptor can provide a URL. This will + // be present for installed fonts, but not for those activated from an + // in-memory resource. + auto IsInstalledFont = [](CTFontRef aFont) { + CTFontDescriptorRef desc = CTFontCopyFontDescriptor(aFont); + CFTypeRef attr = CTFontDescriptorCopyAttribute(desc, kCTFontURLAttribute); + CFRelease(desc); + bool result = false; + if (attr) { + result = true; + CFRelease(attr); + } + return result; + }; + + SkUniqueCFRef baseCGFont; + + // If we have a system font we need to use the CGFont APIs to avoid having the + // underlying font change for us when using CTFontCreateCopyWithAttributes. + if (IsInstalledFont(baseFont)) { + baseCGFont.reset(CTFontCopyGraphicsFont(baseFont, nullptr)); + + // The last parameter (CTFontDescriptorRef attributes) *must* be nullptr. + // If non-nullptr then with fonts with variation axes, the copy will fail in + // CGFontVariationFromDictCallback when it assumes kCGFontVariationAxisName is CFNumberRef + // which it quite obviously is not. + + // Because we cannot setup the CTFont descriptor to match, the same restriction applies here + // as other uses of CTFontCreateWithGraphicsFont which is that such CTFonts should not escape + // the scaler context, since they aren't 'normal'. + + // Avoid calling potentially buggy variation APIs on pre-Sierra macOS + // versions (see bug 1331683). + // + // And on HighSierra, CTFontCreateWithGraphicsFont properly carries over + // variation settings from the CGFont to CTFont, so we don't need to do + // the extra work here -- and this seems to avoid Core Text crashiness + // seen in bug 1454094. + // + // However, for installed fonts it seems we DO need to copy the variations + // explicitly even on 10.13, otherwise fonts fail to render (as in bug + // 1455494) when non-default values are used. Fortunately, the crash + // mentioned above occurs with data fonts, not (AFAICT) with system- + // installed fonts. + // + // So we only need to do this "the hard way" on Sierra, and for installed + // fonts on HighSierra+; otherwise, just let the standard CTFont function + // do its thing. + // + // NOTE in case this ever needs further adjustment: there is similar logic + // in four places in the tree (sadly): + // CreateCTFontFromCGFontWithVariations in gfxMacFont.cpp + // CreateCTFontFromCGFontWithVariations in ScaledFontMac.cpp + // CreateCTFontFromCGFontWithVariations in cairo-quartz-font.c + // ctfont_create_exact_copy in SkFontHost_mac.cpp + + // Not UniqueCFRef<> because CGFontCopyVariations can return null! + CFDictionaryRef variations = CGFontCopyVariations(baseCGFont.get()); + if (variations) { + CFDictionarySetValue(attr.get(), kCTFontVariationAttribute, variations); + CFRelease(variations); + } + } + + SkUniqueCFRef desc(CTFontDescriptorCreateWithAttributes(attr.get())); + + if (baseCGFont.get()) { + return SkUniqueCFRef( + CTFontCreateWithGraphicsFont(baseCGFont.get(), textSize, nullptr, desc.get())); + } + + return SkUniqueCFRef( + CTFontCreateCopyWithAttributes(baseFont, textSize, nullptr, desc.get())); +} + +CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face) { + return face ? (CTFontRef)face->internal_private_getCTFontRef() : nullptr; +} + +static bool find_by_CTFontRef(SkTypeface* cached, void* context) { + CTFontRef self = (CTFontRef)context; + CTFontRef other = (CTFontRef)cached->internal_private_getCTFontRef(); + + return CFEqual(self, other); +} + +/** Creates a typeface, searching the cache if providedData is nullptr. */ +sk_sp SkTypeface_Mac::Make(SkUniqueCFRef font, + OpszVariation opszVariation, + std::unique_ptr providedData) { + static SkMutex gTFCacheMutex; + static SkTypefaceCache gTFCache; + + SkASSERT(font); + const bool isFromStream(providedData); + + auto makeTypeface = [&]() { + SkUniqueCFRef desc(CTFontCopyFontDescriptor(font.get())); + SkFontStyle style = SkCTFontDescriptorGetSkFontStyle(desc.get(), isFromStream); + CTFontSymbolicTraits traits = CTFontGetSymbolicTraits(font.get()); + bool isFixedPitch = SkToBool(traits & kCTFontMonoSpaceTrait); + + return sk_sp(new SkTypeface_Mac(std::move(font), style, isFixedPitch, + opszVariation, std::move(providedData))); + }; + + if (isFromStream) { + return makeTypeface(); + } + + SkAutoMutexExclusive ama(gTFCacheMutex); + sk_sp face = gTFCache.findByProcAndRef(find_by_CTFontRef, (void*)font.get()); + if (!face) { + face = makeTypeface(); + if (face) { + gTFCache.add(face); + } + } + return face; +} + +/* This function is visible on the outside. It first searches the cache, and if + * not found, returns a new entry (after adding it to the cache). + */ +sk_sp SkMakeTypefaceFromCTFont(CTFontRef font) { + CFRetain(font); + return SkTypeface_Mac::Make(SkUniqueCFRef(font), + OpszVariation(), + nullptr); +} + +static bool find_dict_CGFloat(CFDictionaryRef dict, CFStringRef name, CGFloat* value) { + CFNumberRef num; + return CFDictionaryGetValueIfPresent(dict, name, (const void**)&num) + && CFNumberIsFloatType(num) + && CFNumberGetValue(num, kCFNumberCGFloatType, value); +} + +template struct LinearInterpolater { + struct Mapping { + S src_val; + D dst_val; + }; + constexpr LinearInterpolater(Mapping const mapping[], int mappingCount) + : fMapping(mapping), fMappingCount(mappingCount) {} + + static D map(S value, S src_min, S src_max, D dst_min, D dst_max) { + SkASSERT(src_min < src_max); + SkASSERT(dst_min <= dst_max); + return C()(dst_min + (((value - src_min) * (dst_max - dst_min)) / (src_max - src_min))); + } + + D map(S val) const { + // -Inf to [0] + if (val < fMapping[0].src_val) { + return fMapping[0].dst_val; + } + + // Linear from [i] to [i+1] + for (int i = 0; i < fMappingCount - 1; ++i) { + if (val < fMapping[i+1].src_val) { + return map(val, fMapping[i].src_val, fMapping[i+1].src_val, + fMapping[i].dst_val, fMapping[i+1].dst_val); + } + } + + // From [n] to +Inf + // if (fcweight < Inf) + return fMapping[fMappingCount - 1].dst_val; + } + + Mapping const * fMapping; + int fMappingCount; +}; + +struct RoundCGFloatToInt { + int operator()(CGFloat s) { return s + 0.5; } +}; +struct CGFloatIdentity { + CGFloat operator()(CGFloat s) { return s; } +}; + +/** Convert the [0, 1000] CSS weight to [-1, 1] CTFontDescriptor weight (for system fonts). + * + * The -1 to 1 weights reported by CTFontDescriptors have different mappings depending on if the + * CTFont is native or created from a CGDataProvider. + */ +CGFloat SkCTFontCTWeightForCSSWeight(int fontstyleWeight) { + using Interpolator = LinearInterpolater; + + // Note that Mac supports the old OS2 version A so 0 through 10 are as if multiplied by 100. + // However, on this end we can't tell, so this is ignored. + + static Interpolator::Mapping nativeWeightMappings[11]; + static SkOnce once; + once([&] { + const CGFloat(&nsFontWeights)[11] = SkCTFontGetNSFontWeightMapping(); + for (int i = 0; i < 11; ++i) { + nativeWeightMappings[i].src_val = i * 100; + nativeWeightMappings[i].dst_val = nsFontWeights[i]; + } + }); + static constexpr Interpolator nativeInterpolator( + nativeWeightMappings, std::size(nativeWeightMappings)); + + return nativeInterpolator.map(fontstyleWeight); +} + +/** Convert the [-1, 1] CTFontDescriptor weight to [0, 1000] CSS weight. + * + * The -1 to 1 weights reported by CTFontDescriptors have different mappings depending on if the + * CTFont is native or created from a CGDataProvider. + */ +static int ct_weight_to_fontstyle(CGFloat cgWeight, bool fromDataProvider) { + using Interpolator = LinearInterpolater; + + // Note that Mac supports the old OS2 version A so 0 through 10 are as if multiplied by 100. + // However, on this end we can't tell, so this is ignored. + + static Interpolator::Mapping nativeWeightMappings[11]; + static Interpolator::Mapping dataProviderWeightMappings[11]; + static SkOnce once; + once([&] { + const CGFloat(&nsFontWeights)[11] = SkCTFontGetNSFontWeightMapping(); + const CGFloat(&userFontWeights)[11] = SkCTFontGetDataFontWeightMapping(); + for (int i = 0; i < 11; ++i) { + nativeWeightMappings[i].src_val = nsFontWeights[i]; + nativeWeightMappings[i].dst_val = i * 100; + + dataProviderWeightMappings[i].src_val = userFontWeights[i]; + dataProviderWeightMappings[i].dst_val = i * 100; + } + }); + static constexpr Interpolator nativeInterpolator( + nativeWeightMappings, std::size(nativeWeightMappings)); + static constexpr Interpolator dataProviderInterpolator( + dataProviderWeightMappings, std::size(dataProviderWeightMappings)); + + return fromDataProvider ? dataProviderInterpolator.map(cgWeight) + : nativeInterpolator.map(cgWeight); +} + +/** Convert the [0, 10] CSS weight to [-1, 1] CTFontDescriptor width. */ +CGFloat SkCTFontCTWidthForCSSWidth(int fontstyleWidth) { + using Interpolator = LinearInterpolater; + + // Values determined by creating font data with every width, creating a CTFont, + // and asking the CTFont for its width. See TypefaceStyle test for basics. + static constexpr Interpolator::Mapping widthMappings[] = { + { 0, -0.5 }, + { 10, 0.5 }, + }; + static constexpr Interpolator interpolator(widthMappings, std::size(widthMappings)); + return interpolator.map(fontstyleWidth); +} + +/** Convert the [-1, 1] CTFontDescriptor width to [0, 10] CSS weight. */ +static int ct_width_to_fontstyle(CGFloat cgWidth) { + using Interpolator = LinearInterpolater; + + // Values determined by creating font data with every width, creating a CTFont, + // and asking the CTFont for its width. See TypefaceStyle test for basics. + static constexpr Interpolator::Mapping widthMappings[] = { + { -0.5, 0 }, + { 0.5, 10 }, + }; + static constexpr Interpolator interpolator(widthMappings, std::size(widthMappings)); + return interpolator.map(cgWidth); +} + +SkFontStyle SkCTFontDescriptorGetSkFontStyle(CTFontDescriptorRef desc, bool fromDataProvider) { + SkUniqueCFRef traits(CTFontDescriptorCopyAttribute(desc, kCTFontTraitsAttribute)); + CFDictionaryRef fontTraitsDict; + if (!SkCFDynamicCast(traits.get(), &fontTraitsDict, "Font traits")) { + return SkFontStyle(); + } + + CGFloat weight, width, slant; + if (!find_dict_CGFloat(fontTraitsDict, kCTFontWeightTrait, &weight)) { + weight = 0; + } + if (!find_dict_CGFloat(fontTraitsDict, kCTFontWidthTrait, &width)) { + width = 0; + } + if (!find_dict_CGFloat(fontTraitsDict, kCTFontSlantTrait, &slant)) { + slant = 0; + } + + return SkFontStyle(ct_weight_to_fontstyle(weight, fromDataProvider), + ct_width_to_fontstyle(width), + slant ? SkFontStyle::kItalic_Slant + : SkFontStyle::kUpright_Slant); +} + + +// Web fonts added to the CTFont registry do not return their character set. +// Iterate through the font in this case. The existing caller caches the result, +// so the performance impact isn't too bad. +static void populate_glyph_to_unicode_slow(CTFontRef ctFont, CFIndex glyphCount, + SkUnichar* out) { + sk_bzero(out, glyphCount * sizeof(SkUnichar)); + UniChar unichar = 0; + while (glyphCount > 0) { + CGGlyph glyph; + if (CTFontGetGlyphsForCharacters(ctFont, &unichar, &glyph, 1)) { + if (out[glyph] == 0) { + out[glyph] = unichar; + --glyphCount; + } + } + if (++unichar == 0) { + break; + } + } +} + +static constexpr uint16_t kPlaneSize = 1 << 13; + +static void get_plane_glyph_map(const uint8_t* bits, + CTFontRef ctFont, + CFIndex glyphCount, + SkUnichar* glyphToUnicode, + uint8_t planeIndex) { + SkUnichar planeOrigin = (SkUnichar)planeIndex << 16; // top half of codepoint. + for (uint16_t i = 0; i < kPlaneSize; i++) { + uint8_t mask = bits[i]; + if (!mask) { + continue; + } + for (uint8_t j = 0; j < 8; j++) { + if (0 == (mask & ((uint8_t)1 << j))) { + continue; + } + uint16_t planeOffset = (i << 3) | j; + SkUnichar codepoint = planeOrigin | (SkUnichar)planeOffset; + uint16_t utf16[2] = {planeOffset, 0}; + size_t count = 1; + if (planeOrigin != 0) { + count = SkUTF::ToUTF16(codepoint, utf16); + } + CGGlyph glyphs[2] = {0, 0}; + if (CTFontGetGlyphsForCharacters(ctFont, utf16, glyphs, count)) { + SkASSERT(glyphs[1] == 0); + SkASSERT(glyphs[0] < glyphCount); + // CTFontCopyCharacterSet and CTFontGetGlyphsForCharacters seem to add 'support' + // for characters 0x9, 0xA, and 0xD mapping them to the glyph for character 0x20? + // Prefer mappings to codepoints at or above 0x20. + if (glyphToUnicode[glyphs[0]] < 0x20) { + glyphToUnicode[glyphs[0]] = codepoint; + } + } + } + } +} +// Construct Glyph to Unicode table. +static void populate_glyph_to_unicode(CTFontRef ctFont, CFIndex glyphCount, + SkUnichar* glyphToUnicode) { + sk_bzero(glyphToUnicode, sizeof(SkUnichar) * glyphCount); + SkUniqueCFRef charSet(CTFontCopyCharacterSet(ctFont)); + if (!charSet) { + populate_glyph_to_unicode_slow(ctFont, glyphCount, glyphToUnicode); + return; + } + + SkUniqueCFRef bitmap( + CFCharacterSetCreateBitmapRepresentation(nullptr, charSet.get())); + if (!bitmap) { + return; + } + CFIndex dataLength = CFDataGetLength(bitmap.get()); + if (!dataLength) { + return; + } + SkASSERT(dataLength >= kPlaneSize); + const UInt8* bits = CFDataGetBytePtr(bitmap.get()); + + get_plane_glyph_map(bits, ctFont, glyphCount, glyphToUnicode, 0); + /* + A CFData object that specifies the bitmap representation of the Unicode + character points the for the new character set. The bitmap representation could + contain all the Unicode character range starting from BMP to Plane 16. The + first 8KiB (8192 bytes) of the data represent the BMP range. The BMP range 8KiB + can be followed by zero to sixteen 8KiB bitmaps, each prepended with the plane + index byte. For example, the bitmap representing the BMP and Plane 2 has the + size of 16385 bytes (8KiB for BMP, 1 byte index, and a 8KiB bitmap for Plane + 2). The plane index byte, in this case, contains the integer value two. + */ + + if (dataLength <= kPlaneSize) { + return; + } + int extraPlaneCount = (dataLength - kPlaneSize) / (1 + kPlaneSize); + SkASSERT(dataLength == kPlaneSize + extraPlaneCount * (1 + kPlaneSize)); + while (extraPlaneCount-- > 0) { + bits += kPlaneSize; + uint8_t planeIndex = *bits++; + SkASSERT(planeIndex >= 1); + SkASSERT(planeIndex <= 16); + get_plane_glyph_map(bits, ctFont, glyphCount, glyphToUnicode, planeIndex); + } +} + +void SkTypeface_Mac::getGlyphToUnicodeMap(SkUnichar* dstArray) const { + SkUniqueCFRef ctFont = + SkCTFontCreateExactCopy(fFontRef.get(), CTFontGetUnitsPerEm(fFontRef.get()), + fOpszVariation); + CFIndex glyphCount = CTFontGetGlyphCount(ctFont.get()); + populate_glyph_to_unicode(ctFont.get(), glyphCount, dstArray); +} + +std::unique_ptr SkTypeface_Mac::onGetAdvancedMetrics() const { + + SkUniqueCFRef ctFont = + SkCTFontCreateExactCopy(fFontRef.get(), CTFontGetUnitsPerEm(fFontRef.get()), + fOpszVariation); + + std::unique_ptr info(new SkAdvancedTypefaceMetrics); + + { + SkUniqueCFRef fontName(CTFontCopyPostScriptName(ctFont.get())); + if (fontName.get()) { + SkStringFromCFString(fontName.get(), &info->fPostScriptName); + info->fFontName = info->fPostScriptName; + } + } + + CFArrayRef ctAxes = this->getVariationAxes(); + if (ctAxes && CFArrayGetCount(ctAxes) > 0) { + info->fFlags |= SkAdvancedTypefaceMetrics::kVariable_FontFlag; + } + + SkOTTableOS2_V4::Type fsType; + if (sizeof(fsType) == this->getTableData(SkTEndian_SwapBE32(SkOTTableOS2::TAG), + offsetof(SkOTTableOS2_V4, fsType), + sizeof(fsType), + &fsType)) { + SkOTUtils::SetAdvancedTypefaceFlags(fsType, info.get()); + } + + // If it's not a truetype font, mark it as 'other'. Assume that TrueType + // fonts always have both glyf and loca tables. At the least, this is what + // sfntly needs to subset the font. CTFontCopyAttribute() does not always + // succeed in determining this directly. + if (!this->getTableSize(SkSetFourByteTag('g','l','y','f')) || + !this->getTableSize(SkSetFourByteTag('l','o','c','a'))) + { + return info; + } + + info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; + CTFontSymbolicTraits symbolicTraits = CTFontGetSymbolicTraits(ctFont.get()); + if (symbolicTraits & kCTFontMonoSpaceTrait) { + info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; + } + if (symbolicTraits & kCTFontItalicTrait) { + info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; + } + CTFontStylisticClass stylisticClass = symbolicTraits & kCTFontClassMaskTrait; + if (stylisticClass >= kCTFontOldStyleSerifsClass && stylisticClass <= kCTFontSlabSerifsClass) { + info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; + } else if (stylisticClass & kCTFontScriptsClass) { + info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; + } + info->fItalicAngle = (int16_t) CTFontGetSlantAngle(ctFont.get()); + info->fAscent = (int16_t) CTFontGetAscent(ctFont.get()); + info->fDescent = (int16_t) CTFontGetDescent(ctFont.get()); + info->fCapHeight = (int16_t) CTFontGetCapHeight(ctFont.get()); + CGRect bbox = CTFontGetBoundingBox(ctFont.get()); + + SkRect r; + r.setLTRB(SkScalarFromCGFloat(SkCGRectGetMinX(bbox)), // Left + SkScalarFromCGFloat(SkCGRectGetMaxY(bbox)), // Top + SkScalarFromCGFloat(SkCGRectGetMaxX(bbox)), // Right + SkScalarFromCGFloat(SkCGRectGetMinY(bbox))); // Bottom + + r.roundOut(&(info->fBBox)); + + // Figure out a good guess for StemV - Min width of i, I, !, 1. + // This probably isn't very good with an italic font. + int16_t min_width = SHRT_MAX; + info->fStemV = 0; + static const UniChar stem_chars[] = {'i', 'I', '!', '1'}; + const size_t count = sizeof(stem_chars) / sizeof(stem_chars[0]); + CGGlyph glyphs[count]; + CGRect boundingRects[count]; + if (CTFontGetGlyphsForCharacters(ctFont.get(), stem_chars, glyphs, count)) { + CTFontGetBoundingRectsForGlyphs(ctFont.get(), kCTFontOrientationHorizontal, + glyphs, boundingRects, count); + for (size_t i = 0; i < count; i++) { + int16_t width = (int16_t) boundingRects[i].size.width; + if (width > 0 && width < min_width) { + min_width = width; + info->fStemV = min_width; + } + } + } + return info; +} + +static SK_SFNT_ULONG get_font_type_tag(CTFontRef ctFont) { + SkUniqueCFRef fontFormatRef( + static_cast(CTFontCopyAttribute(ctFont, kCTFontFormatAttribute))); + if (!fontFormatRef) { + return 0; + } + + SInt32 fontFormatValue; + if (!CFNumberGetValue(fontFormatRef.get(), kCFNumberSInt32Type, &fontFormatValue)) { + return 0; + } + + switch (fontFormatValue) { + case kCTFontFormatOpenTypePostScript: + return SkSFNTHeader::fontType_OpenTypeCFF::TAG; + case kCTFontFormatOpenTypeTrueType: + return SkSFNTHeader::fontType_WindowsTrueType::TAG; + case kCTFontFormatTrueType: + return SkSFNTHeader::fontType_MacTrueType::TAG; + case kCTFontFormatPostScript: + return SkSFNTHeader::fontType_PostScript::TAG; + case kCTFontFormatBitmap: + return SkSFNTHeader::fontType_MacTrueType::TAG; + case kCTFontFormatUnrecognized: + default: + return 0; + } +} + +std::unique_ptr SkTypeface_Mac::onOpenStream(int* ttcIndex) const { + *ttcIndex = 0; + + fInitStream([this]{ + if (fStream) { + return; + } + + SK_SFNT_ULONG fontType = get_font_type_tag(fFontRef.get()); + + // get table tags + int numTables = this->countTables(); + SkTDArray tableTags; + tableTags.resize(numTables); + this->getTableTags(tableTags.begin()); + + // CT seems to be unreliable in being able to obtain the type, + // even if all we want is the first four bytes of the font resource. + // Just the presence of the FontForge 'FFTM' table seems to throw it off. + if (fontType == 0) { + fontType = SkSFNTHeader::fontType_WindowsTrueType::TAG; + + // see https://skbug.com/7630#c7 + bool couldBeCFF = false; + constexpr SkFontTableTag CFFTag = SkSetFourByteTag('C', 'F', 'F', ' '); + constexpr SkFontTableTag CFF2Tag = SkSetFourByteTag('C', 'F', 'F', '2'); + for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { + if (CFFTag == tableTags[tableIndex] || CFF2Tag == tableTags[tableIndex]) { + couldBeCFF = true; + } + } + if (couldBeCFF) { + fontType = SkSFNTHeader::fontType_OpenTypeCFF::TAG; + } + } + + // Sometimes CoreGraphics incorrectly thinks a font is kCTFontFormatPostScript. + // It is exceedingly unlikely that this is the case, so double check + // (see https://crbug.com/809763 ). + if (fontType == SkSFNTHeader::fontType_PostScript::TAG) { + // see if there are any required 'typ1' tables (see Adobe Technical Note #5180) + bool couldBeTyp1 = false; + constexpr SkFontTableTag TYPE1Tag = SkSetFourByteTag('T', 'Y', 'P', '1'); + constexpr SkFontTableTag CIDTag = SkSetFourByteTag('C', 'I', 'D', ' '); + for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { + if (TYPE1Tag == tableTags[tableIndex] || CIDTag == tableTags[tableIndex]) { + couldBeTyp1 = true; + } + } + if (!couldBeTyp1) { + fontType = SkSFNTHeader::fontType_OpenTypeCFF::TAG; + } + } + + // get the table sizes and accumulate the total size of the font + SkTDArray tableSizes; + size_t totalSize = sizeof(SkSFNTHeader) + sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables; + for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { + size_t tableSize = this->getTableSize(tableTags[tableIndex]); + totalSize += (tableSize + 3) & ~3; + *tableSizes.append() = tableSize; + } + + // reserve memory for stream, and zero it (tables must be zero padded) + fStream = std::make_unique(totalSize); + char* dataStart = (char*)fStream->getMemoryBase(); + sk_bzero(dataStart, totalSize); + char* dataPtr = dataStart; + + // compute font header entries + uint16_t entrySelector = 0; + uint16_t searchRange = 1; + while (searchRange < numTables >> 1) { + entrySelector++; + searchRange <<= 1; + } + searchRange <<= 4; + uint16_t rangeShift = (numTables << 4) - searchRange; + + // write font header + SkSFNTHeader* header = (SkSFNTHeader*)dataPtr; + header->fontType = fontType; + header->numTables = SkEndian_SwapBE16(numTables); + header->searchRange = SkEndian_SwapBE16(searchRange); + header->entrySelector = SkEndian_SwapBE16(entrySelector); + header->rangeShift = SkEndian_SwapBE16(rangeShift); + dataPtr += sizeof(SkSFNTHeader); + + // write tables + SkSFNTHeader::TableDirectoryEntry* entry = (SkSFNTHeader::TableDirectoryEntry*)dataPtr; + dataPtr += sizeof(SkSFNTHeader::TableDirectoryEntry) * numTables; + for (int tableIndex = 0; tableIndex < numTables; ++tableIndex) { + size_t tableSize = tableSizes[tableIndex]; + this->getTableData(tableTags[tableIndex], 0, tableSize, dataPtr); + entry->tag = SkEndian_SwapBE32(tableTags[tableIndex]); + entry->checksum = SkEndian_SwapBE32(SkOTUtils::CalcTableChecksum((SK_OT_ULONG*)dataPtr, + tableSize)); + entry->offset = SkEndian_SwapBE32(SkToU32(dataPtr - dataStart)); + entry->logicalLength = SkEndian_SwapBE32(SkToU32(tableSize)); + + dataPtr += (tableSize + 3) & ~3; + ++entry; + } + }); + return fStream->duplicate(); +} + +std::unique_ptr SkTypeface_Mac::onOpenExistingStream(int* ttcIndex) const { + *ttcIndex = 0; + return fStream ? fStream->duplicate() : nullptr; +} + +bool SkTypeface_Mac::onGlyphMaskNeedsCurrentColor() const { + // `CPAL` (`COLR` and `SVG`) fonts may need the current color. + // However, even `sbix` fonts can have glyphs which need the current color. + // These may be glyphs with paths but no `sbix` entries, which are impossible to distinguish. + return this->fHasColorGlyphs; +} + +CFArrayRef SkTypeface_Mac::getVariationAxes() const { + fInitVariationAxes([this]{ + fVariationAxes.reset(CTFontCopyVariationAxes(fFontRef.get())); + }); + return fVariationAxes.get(); +} + +int SkTypeface_Mac::onGetVariationDesignPosition( + SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) const +{ + CFArrayRef ctAxes = this->getVariationAxes(); + if (!ctAxes) { + return -1; + } + CFIndex axisCount = CFArrayGetCount(ctAxes); + if (!coordinates || coordinateCount < axisCount) { + return axisCount; + } + + // On 10.12 and later, this only returns non-default variations. + SkUniqueCFRef ctVariation(CTFontCopyVariation(fFontRef.get())); + if (!ctVariation) { + return -1; + } + + for (int i = 0; i < axisCount; ++i) { + CFDictionaryRef axisInfoDict; + if (!SkCFDynamicCast(CFArrayGetValueAtIndex(ctAxes, i), &axisInfoDict, "Axis")) { + return -1; + } + + int64_t tagLong; + CFNumberRef tagNumber; + CFTypeRef tag = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisIdentifierKey); + if (!SkCFNumberDynamicCast(tag, &tagLong, &tagNumber, "Axis tag")) { + return -1; + } + coordinates[i].axis = tagLong; + + CGFloat valueCGFloat; + CFTypeRef value = CFDictionaryGetValue(ctVariation.get(), tagNumber); + if (value) { + if (!SkCFNumberDynamicCast(value, &valueCGFloat, nullptr, "Variation value")) { + return -1; + } + } else { + CFTypeRef def = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisDefaultValueKey); + if (!SkCFNumberDynamicCast(def, &valueCGFloat, nullptr, "Axis default value")) { + return -1; + } + } + coordinates[i].value = SkScalarFromCGFloat(valueCGFloat); + } + return axisCount; +} + +int SkTypeface_Mac::onGetUPEM() const { + SkUniqueCFRef cgFont(CTFontCopyGraphicsFont(fFontRef.get(), nullptr)); + return CGFontGetUnitsPerEm(cgFont.get()); +} + +SkTypeface::LocalizedStrings* SkTypeface_Mac::onCreateFamilyNameIterator() const { + sk_sp nameIter = + SkOTUtils::LocalizedStrings_NameTable::MakeForFamilyNames(*this); + if (!nameIter) { + CFStringRef cfLanguageRaw; + SkUniqueCFRef cfFamilyName( + CTFontCopyLocalizedName(fFontRef.get(), kCTFontFamilyNameKey, &cfLanguageRaw)); + SkUniqueCFRef cfLanguage(cfLanguageRaw); + + SkString skLanguage; + SkString skFamilyName; + if (cfLanguage) { + SkStringFromCFString(cfLanguage.get(), &skLanguage); + } else { + skLanguage = "und"; //undetermined + } + if (cfFamilyName) { + SkStringFromCFString(cfFamilyName.get(), &skFamilyName); + } + + nameIter = sk_make_sp(skFamilyName, skLanguage); + } + return nameIter.release(); +} + +int SkTypeface_Mac::onGetTableTags(SkFontTableTag tags[]) const { + SkUniqueCFRef cfArray( + CTFontCopyAvailableTables(fFontRef.get(), kCTFontTableOptionNoOptions)); + if (!cfArray) { + return 0; + } + CFIndex count = CFArrayGetCount(cfArray.get()); + if (tags) { + for (CFIndex i = 0; i < count; ++i) { + uintptr_t fontTag = reinterpret_cast( + CFArrayGetValueAtIndex(cfArray.get(), i)); + tags[i] = static_cast(fontTag); + } + } + return count; +} + +// If, as is the case with web fonts, the CTFont data isn't available, +// the CGFont data may work. While the CGFont may always provide the +// right result, leave the CTFont code path to minimize disruption. +static SkUniqueCFRef copy_table_from_font(CTFontRef ctFont, SkFontTableTag tag) { + SkUniqueCFRef data(CTFontCopyTable(ctFont, (CTFontTableTag) tag, + kCTFontTableOptionNoOptions)); + if (!data) { + SkUniqueCFRef cgFont(CTFontCopyGraphicsFont(ctFont, nullptr)); + data.reset(CGFontCopyTableForTag(cgFont.get(), tag)); + } + return data; +} + +size_t SkTypeface_Mac::onGetTableData(SkFontTableTag tag, size_t offset, + size_t length, void* dstData) const { + SkUniqueCFRef srcData = copy_table_from_font(fFontRef.get(), tag); + if (!srcData) { + return 0; + } + + size_t srcSize = CFDataGetLength(srcData.get()); + if (offset >= srcSize) { + return 0; + } + if (length > srcSize - offset) { + length = srcSize - offset; + } + if (dstData) { + memcpy(dstData, CFDataGetBytePtr(srcData.get()) + offset, length); + } + return length; +} + +sk_sp SkTypeface_Mac::onCopyTableData(SkFontTableTag tag) const { + SkUniqueCFRef srcData = copy_table_from_font(fFontRef.get(), tag); + if (!srcData) { + return nullptr; + } + const UInt8* data = CFDataGetBytePtr(srcData.get()); + CFIndex length = CFDataGetLength(srcData.get()); + return SkData::MakeWithProc(data, length, + [](const void*, void* ctx) { + CFRelease((CFDataRef)ctx); + }, (void*)srcData.release()); +} + +std::unique_ptr SkTypeface_Mac::onCreateScalerContext( + const SkScalerContextEffects& effects, const SkDescriptor* desc) const +{ + return std::make_unique( + sk_ref_sp(const_cast(this)), effects, desc); +} + +void SkTypeface_Mac::onFilterRec(SkScalerContextRec* rec) const { + if (rec->fFlags & SkScalerContext::kLCD_BGROrder_Flag || + rec->fFlags & SkScalerContext::kLCD_Vertical_Flag) + { + rec->fMaskFormat = SkMask::kA8_Format; + // Render the glyphs as close as possible to what was requested. + // The above turns off subpixel rendering, but the user requested it. + // Normal hinting will cause the A8 masks to be generated from CoreGraphics subpixel masks. + // See comments below for more details. + rec->setHinting(SkFontHinting::kNormal); + } + + unsigned flagsWeDontSupport = SkScalerContext::kForceAutohinting_Flag | + SkScalerContext::kLCD_BGROrder_Flag | + SkScalerContext::kLCD_Vertical_Flag; + + rec->fFlags &= ~flagsWeDontSupport; + + const SkCTFontSmoothBehavior smoothBehavior = SkCTFontGetSmoothBehavior(); + + // Only two levels of hinting are supported. + // kNo_Hinting means avoid CoreGraphics outline dilation (smoothing). + // kNormal_Hinting means CoreGraphics outline dilation (smoothing) is allowed. + if (rec->getHinting() != SkFontHinting::kNone) { + rec->setHinting(SkFontHinting::kNormal); + } + // If smoothing has no effect, don't request it. + if (smoothBehavior == SkCTFontSmoothBehavior::none) { + rec->setHinting(SkFontHinting::kNone); + } + + // FIXME: lcd smoothed un-hinted rasterization unsupported. + // Tracked by http://code.google.com/p/skia/issues/detail?id=915 . + // There is no current means to honor a request for unhinted lcd, + // so arbitrarilly ignore the hinting request and honor lcd. + + // Hinting and smoothing should be orthogonal, but currently they are not. + // CoreGraphics has no API to influence hinting. However, its lcd smoothed + // output is drawn from auto-dilated outlines (the amount of which is + // determined by AppleFontSmoothing). Its regular anti-aliased output is + // drawn from un-dilated outlines. + + // The behavior of Skia is as follows: + // [AA][no-hint]: generate AA using CoreGraphic's AA output. + // [AA][yes-hint]: use CoreGraphic's LCD output and reduce it to a single + // channel. This matches [LCD][yes-hint] in weight. + // [LCD][no-hint]: currently unable to honor, and must pick which to respect. + // Currently side with LCD, effectively ignoring the hinting setting. + // [LCD][yes-hint]: generate LCD using CoreGraphic's LCD output. + if (rec->fMaskFormat == SkMask::kLCD16_Format) { + if (smoothBehavior == SkCTFontSmoothBehavior::subpixel) { + //CoreGraphics creates 555 masks for smoothed text anyway. + rec->fMaskFormat = SkMask::kLCD16_Format; + rec->setHinting(SkFontHinting::kNormal); + } else { + rec->fMaskFormat = SkMask::kA8_Format; + if (smoothBehavior != SkCTFontSmoothBehavior::none) { + rec->setHinting(SkFontHinting::kNormal); + } + } + } + + // CoreText provides no information as to whether a glyph will be color or not. + // Fonts may mix outlines and bitmaps, so information is needed on a glyph by glyph basis. + // If a font contains an 'sbix' table, consider it to be a color font, and disable lcd. + if (fHasColorGlyphs) { + rec->fMaskFormat = SkMask::kARGB32_Format; + } + + // Smoothing will be used if the format is either LCD or if there is hinting. + // In those cases, we need to choose the proper dilation mask based on the color. + if (rec->fMaskFormat == SkMask::kLCD16_Format || + (rec->fMaskFormat == SkMask::kA8_Format && rec->getHinting() != SkFontHinting::kNone)) { + SkColor color = rec->getLuminanceColor(); + int r = SkColorGetR(color); + int g = SkColorGetG(color); + int b = SkColorGetB(color); + // Choose whether to draw using a light-on-dark mask based on observed + // color/luminance thresholds that CoreText uses. + if (r >= 85 && g >= 85 && b >= 85 && r + g + b >= 2 * 255) { + rec->fFlags |= SkScalerContext::kLightOnDark_Flag; + } + } + + // Unhinted A8 masks (those not derived from LCD masks) must respect SK_GAMMA_APPLY_TO_A8. + // All other masks can use regular gamma. + if (SkMask::kA8_Format == rec->fMaskFormat && SkFontHinting::kNone == rec->getHinting()) { +#ifndef SK_GAMMA_APPLY_TO_A8 + // SRGBTODO: Is this correct? Do we want contrast boost? + rec->ignorePreBlend(); +#endif + } else { +#ifndef SK_IGNORE_MAC_BLENDING_MATCH_FIX + SkColor color = rec->getLuminanceColor(); + if (smoothBehavior == SkCTFontSmoothBehavior::some) { + // CoreGraphics smoothed text without subpixel coverage blitting goes from a gamma of + // 2.0 for black foreground to a gamma of 1.0 for white foreground. Emulate this + // through the mask gamma by reducing the color values to 1/2. + color = SkColorSetRGB(SkColorGetR(color) * 1/2, + SkColorGetG(color) * 1/2, + SkColorGetB(color) * 1/2); + } else if (smoothBehavior == SkCTFontSmoothBehavior::subpixel) { + // CoreGraphics smoothed text with subpixel coverage blitting goes from a gamma of + // 2.0 for black foreground to a gamma of ~1.4? for white foreground. Emulate this + // through the mask gamma by reducing the color values to 3/4. + color = SkColorSetRGB(SkColorGetR(color) * 3/4, + SkColorGetG(color) * 3/4, + SkColorGetB(color) * 3/4); + } + rec->setLuminanceColor(color); +#endif + + // CoreGraphics dialates smoothed text to provide contrast. + rec->setContrast(0); + } +} + +/** Takes ownership of the CFStringRef. */ +static const char* get_str(CFStringRef ref, SkString* str) { + if (nullptr == ref) { + return nullptr; + } + SkStringFromCFString(ref, str); + CFRelease(ref); + return str->c_str(); +} + +void SkTypeface_Mac::onGetFamilyName(SkString* familyName) const { + get_str(CTFontCopyFamilyName(fFontRef.get()), familyName); +} + +bool SkTypeface_Mac::onGetPostScriptName(SkString* skPostScriptName) const { + SkUniqueCFRef ctPostScriptName(CTFontCopyPostScriptName(fFontRef.get())); + if (!ctPostScriptName) { + return false; + } + if (skPostScriptName) { + SkStringFromCFString(ctPostScriptName.get(), skPostScriptName); + } + return true; +} + +void SkTypeface_Mac::onGetFontDescriptor(SkFontDescriptor* desc, + bool* isLocalStream) const { + SkString tmpStr; + + desc->setFamilyName(get_str(CTFontCopyFamilyName(fFontRef.get()), &tmpStr)); + desc->setFullName(get_str(CTFontCopyFullName(fFontRef.get()), &tmpStr)); + desc->setPostscriptName(get_str(CTFontCopyPostScriptName(fFontRef.get()), &tmpStr)); + desc->setStyle(this->fontStyle()); + desc->setFactoryId(FactoryId); + *isLocalStream = fIsFromStream; +} + +void SkTypeface_Mac::onCharsToGlyphs(const SkUnichar uni[], int count, SkGlyphID glyphs[]) const { + // Undocumented behavior of CTFontGetGlyphsForCharacters with non-bmp code points: + // When a surrogate pair is detected, the glyph index used is the index of the high surrogate. + // It is documented that if a mapping is unavailable, the glyph will be set to 0. + + AutoSTMalloc<1024, UniChar> charStorage; + const UniChar* src; // UniChar is a UTF-16 16-bit code unit. + int srcCount; + const SkUnichar* utf32 = reinterpret_cast(uni); + UniChar* utf16 = charStorage.reset(2 * count); + src = utf16; + for (int i = 0; i < count; ++i) { + utf16 += SkUTF::ToUTF16(utf32[i], utf16); + } + srcCount = SkToInt(utf16 - src); + + // If there are any non-bmp code points, the provided 'glyphs' storage will be inadequate. + AutoSTMalloc<1024, uint16_t> glyphStorage; + uint16_t* macGlyphs = glyphs; + if (srcCount > count) { + macGlyphs = glyphStorage.reset(srcCount); + } + + CTFontGetGlyphsForCharacters(fFontRef.get(), src, macGlyphs, srcCount); + + // If there were any non-bmp, then copy and compact. + // If all are bmp, 'glyphs' already contains the compact glyphs. + // If some are non-bmp, copy and compact into 'glyphs'. + if (srcCount > count) { + SkASSERT(glyphs != macGlyphs); + int extra = 0; + for (int i = 0; i < count; ++i) { + glyphs[i] = macGlyphs[i + extra]; + if (SkUTF::IsLeadingSurrogateUTF16(src[i + extra])) { + ++extra; + } + } + } else { + SkASSERT(glyphs == macGlyphs); + } +} + +int SkTypeface_Mac::onCountGlyphs() const { + return SkToInt(CTFontGetGlyphCount(fFontRef.get())); +} + +/** Creates a dictionary suitable for setting the axes on a CTFont. */ +static CTFontVariation ctvariation_from_SkFontArguments(CTFontRef ct, CFArrayRef ctAxes, + const SkFontArguments& args) { + OpszVariation opsz; + constexpr const SkFourByteTag opszTag = SkSetFourByteTag('o','p','s','z'); + + if (!ctAxes) { + return CTFontVariation(); + } + CFIndex axisCount = CFArrayGetCount(ctAxes); + + // On 10.12 and later, this only returns non-default variations. + SkUniqueCFRef oldCtVariation(CTFontCopyVariation(ct)); + + const SkFontArguments::VariationPosition position = args.getVariationDesignPosition(); + + SkUniqueCFRef newCtVariation( + CFDictionaryCreateMutable(kCFAllocatorDefault, axisCount, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + SkUniqueCFRef wrongOpszVariation; + + for (int i = 0; i < axisCount; ++i) { + CFDictionaryRef axisInfoDict; + if (!SkCFDynamicCast(CFArrayGetValueAtIndex(ctAxes, i), &axisInfoDict, "Axis")) { + return CTFontVariation(); + } + + int64_t tagLong; + CFNumberRef tagNumber; + CFTypeRef tag = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisIdentifierKey); + if (!SkCFNumberDynamicCast(tag, &tagLong, &tagNumber, "Axis tag")) { + return CTFontVariation(); + } + + // The variation axes can be set to any value, but cg will effectively pin them. + // Pin them here to normalize. + double minDouble; + double maxDouble; + double defDouble; + CFTypeRef min = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisMinimumValueKey); + CFTypeRef max = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisMaximumValueKey); + CFTypeRef def = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisDefaultValueKey); + if (!SkCFNumberDynamicCast(min, &minDouble, nullptr, "Axis min") || + !SkCFNumberDynamicCast(max, &maxDouble, nullptr, "Axis max") || + !SkCFNumberDynamicCast(def, &defDouble, nullptr, "Axis def")) + { + return CTFontVariation(); + } + + // Start with the default value. + double value = defDouble; + + // Then the current value. + bool haveCurrentDouble = false; + double currentDouble = 0; + if (oldCtVariation) { + CFTypeRef currentNumber = CFDictionaryGetValue(oldCtVariation.get(), tagNumber); + if (currentNumber) { + if (!SkCFNumberDynamicCast(currentNumber, &value, nullptr, "Variation value")) { + return CTFontVariation(); + } + currentDouble = value; + haveCurrentDouble = true; + } + } + + // Then the requested value. + // The position may be over specified. If there are multiple values for a given axis, + // use the last one since that's what css-fonts-4 requires. + for (int j = position.coordinateCount; j --> 0;) { + if (position.coordinates[j].axis == tagLong) { + value = SkTPin(position.coordinates[j].value, minDouble, maxDouble); + if (tagLong == opszTag) { + opsz.isSet = true; + } + break; + } + } + if (tagLong == opszTag) { + opsz.value = value; + if (haveCurrentDouble && value == currentDouble) { + // Calculate a value strictly in range but different from currentValue. + double wrongOpszDouble = ((maxDouble - minDouble) / 2.0) + minDouble; + if (wrongOpszDouble == currentDouble) { + wrongOpszDouble = ((maxDouble - minDouble) / 4.0) + minDouble; + } + wrongOpszVariation.reset( + CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + SkUniqueCFRef wrongOpszNumber( + CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, &wrongOpszDouble)); + CFDictionarySetValue(wrongOpszVariation.get(), tagNumber, wrongOpszNumber.get()); + } + } + SkUniqueCFRef valueNumber( + CFNumberCreate(kCFAllocatorDefault, kCFNumberDoubleType, &value)); + CFDictionaryAddValue(newCtVariation.get(), tagNumber, valueNumber.get()); + } + return { SkUniqueCFRef(std::move(newCtVariation)), + SkUniqueCFRef(std::move(wrongOpszVariation)), + opsz }; +} + +sk_sp SkTypeface_Mac::onMakeClone(const SkFontArguments& args) const { + CTFontVariation ctVariation = ctvariation_from_SkFontArguments(fFontRef.get(), + this->getVariationAxes(), + args); + + SkUniqueCFRef ctVariant; + if (ctVariation.variation) { + SkUniqueCFRef attributes( + CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + + CTFontRef ctFont = fFontRef.get(); + SkUniqueCFRef wrongOpszFont; + if (ctVariation.wrongOpszVariation) { + // On macOS 11 cloning a system font with an opsz axis and not changing the + // value of the opsz axis (either by setting it to the same value or not + // specifying it at all) when setting a variation causes the variation to + // be set but the cloned font will still compare CFEqual to the original + // font. Work around this by setting the opsz to something which isn't the + // desired value before setting the entire desired variation. + // + // A similar issue occurs with fonts from data on macOS 10.15 and the same + // work around seems to apply. This is less noticeable though since CFEqual + // isn't used on these fonts. + CFDictionarySetValue(attributes.get(), + kCTFontVariationAttribute, ctVariation.wrongOpszVariation.get()); + SkUniqueCFRef varDesc( + CTFontDescriptorCreateWithAttributes(attributes.get())); + wrongOpszFont.reset(CTFontCreateCopyWithAttributes(ctFont, 0, nullptr, varDesc.get())); + ctFont = wrongOpszFont.get(); + } + + CFDictionarySetValue(attributes.get(), + kCTFontVariationAttribute, ctVariation.variation.get()); + SkUniqueCFRef varDesc( + CTFontDescriptorCreateWithAttributes(attributes.get())); + ctVariant.reset(CTFontCreateCopyWithAttributes(ctFont, 0, nullptr, varDesc.get())); + } else { + ctVariant.reset((CTFontRef)CFRetain(fFontRef.get())); + } + if (!ctVariant) { + return nullptr; + } + + return SkTypeface_Mac::Make(std::move(ctVariant), ctVariation.opsz, + fStream ? fStream->duplicate() : nullptr); +} + +static sk_sp skdata_from_skstreamasset(std::unique_ptr stream) { + size_t size = stream->getLength(); + if (const void* base = stream->getMemoryBase()) { + return SkData::MakeWithProc(base, size, + [](const void*, void* ctx) -> void { + delete (SkStreamAsset*)ctx; + }, stream.release()); + } + return SkData::MakeFromStream(stream.get(), size); +} + +static SkUniqueCFRef cfdata_from_skdata(sk_sp data) { + void const * const addr = data->data(); + size_t const size = data->size(); + + CFAllocatorContext ctx = { + 0, // CFIndex version + data.release(), // void* info + nullptr, // const void *(*retain)(const void *info); + nullptr, // void (*release)(const void *info); + nullptr, // CFStringRef (*copyDescription)(const void *info); + nullptr, // void * (*allocate)(CFIndex size, CFOptionFlags hint, void *info); + nullptr, // void*(*reallocate)(void* ptr,CFIndex newsize,CFOptionFlags hint,void* info); + [](void*,void* info) -> void { // void (*deallocate)(void *ptr, void *info); + SkASSERT(info); + ((SkData*)info)->unref(); + }, + nullptr, // CFIndex (*preferredSize)(CFIndex size, CFOptionFlags hint, void *info); + }; + SkUniqueCFRef alloc(CFAllocatorCreate(kCFAllocatorDefault, &ctx)); + return SkUniqueCFRef(CFDataCreateWithBytesNoCopy( + kCFAllocatorDefault, (const UInt8 *)addr, size, alloc.get())); +} + +static SkUniqueCFRef ctfont_from_skdata(sk_sp data, int ttcIndex) { + // TODO: Use CTFontManagerCreateFontDescriptorsFromData when available. + if (ttcIndex != 0) { + return nullptr; + } + + SkUniqueCFRef cfData(cfdata_from_skdata(std::move(data))); + + SkUniqueCFRef desc( + CTFontManagerCreateFontDescriptorFromData(cfData.get())); + if (!desc) { + return nullptr; + } + return SkUniqueCFRef(CTFontCreateWithFontDescriptor(desc.get(), 0, nullptr)); +} + +sk_sp SkTypeface_Mac::MakeFromStream(std::unique_ptr stream, + const SkFontArguments& args) +{ + // TODO: Use CTFontManagerCreateFontDescriptorsFromData when available. + int ttcIndex = args.getCollectionIndex(); + if (ttcIndex != 0) { + return nullptr; + } + + sk_sp data = skdata_from_skstreamasset(stream->duplicate()); + if (!data) { + return nullptr; + } + SkUniqueCFRef ct = ctfont_from_skdata(std::move(data), ttcIndex); + if (!ct) { + return nullptr; + } + + SkUniqueCFRef ctVariant; + CTFontVariation ctVariation; + if (args.getVariationDesignPosition().coordinateCount == 0) { + ctVariant.reset(ct.release()); + } else { + SkUniqueCFRef axes(CTFontCopyVariationAxes(ct.get())); + ctVariation = ctvariation_from_SkFontArguments(ct.get(), axes.get(), args); + + if (ctVariation.variation) { + SkUniqueCFRef attributes( + CFDictionaryCreateMutable(kCFAllocatorDefault, 0, + &kCFTypeDictionaryKeyCallBacks, + &kCFTypeDictionaryValueCallBacks)); + CFDictionaryAddValue(attributes.get(), + kCTFontVariationAttribute, ctVariation.variation.get()); + SkUniqueCFRef varDesc( + CTFontDescriptorCreateWithAttributes(attributes.get())); + ctVariant.reset(CTFontCreateCopyWithAttributes(ct.get(), 0, nullptr, varDesc.get())); + } else { + ctVariant.reset(ct.release()); + } + } + if (!ctVariant) { + return nullptr; + } + + return SkTypeface_Mac::Make(std::move(ctVariant), ctVariation.opsz, std::move(stream)); +} + +int SkTypeface_Mac::onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const +{ + CFArrayRef ctAxes = this->getVariationAxes(); + if (!ctAxes) { + return -1; + } + CFIndex axisCount = CFArrayGetCount(ctAxes); + + if (!parameters || parameterCount < axisCount) { + return axisCount; + } + + // Added in 10.13 + static CFStringRef* kCTFontVariationAxisHiddenKeyPtr = + static_cast(dlsym(RTLD_DEFAULT, "kCTFontVariationAxisHiddenKey")); + + for (int i = 0; i < axisCount; ++i) { + CFDictionaryRef axisInfoDict; + if (!SkCFDynamicCast(CFArrayGetValueAtIndex(ctAxes, i), &axisInfoDict, "Axis")) { + return -1; + } + + int64_t tagLong; + CFTypeRef tag = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisIdentifierKey); + if (!SkCFNumberDynamicCast(tag, &tagLong, nullptr, "Axis tag")) { + return -1; + } + + double minDouble; + double maxDouble; + double defDouble; + CFTypeRef min = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisMinimumValueKey); + CFTypeRef max = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisMaximumValueKey); + CFTypeRef def = CFDictionaryGetValue(axisInfoDict, kCTFontVariationAxisDefaultValueKey); + if (!SkCFNumberDynamicCast(min, &minDouble, nullptr, "Axis min") || + !SkCFNumberDynamicCast(max, &maxDouble, nullptr, "Axis max") || + !SkCFNumberDynamicCast(def, &defDouble, nullptr, "Axis def")) + { + return -1; + } + + SkFontParameters::Variation::Axis& skAxis = parameters[i]; + skAxis.tag = tagLong; + skAxis.min = minDouble; + skAxis.max = maxDouble; + skAxis.def = defDouble; + skAxis.setHidden(false); + if (kCTFontVariationAxisHiddenKeyPtr) { + CFTypeRef hidden = CFDictionaryGetValue(axisInfoDict,*kCTFontVariationAxisHiddenKeyPtr); + if (hidden) { + // At least macOS 11 Big Sur Beta 4 uses CFNumberRef instead of CFBooleanRef. + // https://crbug.com/1113444 + CFBooleanRef hiddenBoolean; + int hiddenInt; + if (SkCFDynamicCast(hidden, &hiddenBoolean, nullptr)) { + skAxis.setHidden(CFBooleanGetValue(hiddenBoolean)); + } else if (SkCFNumberDynamicCast(hidden, &hiddenInt, nullptr, "Axis hidden")) { + skAxis.setHidden(hiddenInt); + } else { + return -1; + } + } + } + } + return axisCount; +} + +#endif diff --git a/gfx/skia/skia/src/ports/SkTypeface_mac_ct.h b/gfx/skia/skia/src/ports/SkTypeface_mac_ct.h new file mode 100644 index 0000000000..1ae5d89365 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkTypeface_mac_ct.h @@ -0,0 +1,145 @@ +/* + * Copyright 2020 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTypeface_mac_ct_DEFINED +#define SkTypeface_mac_ct_DEFINED + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS) + +#include "include/core/SkFontArguments.h" +#include "include/core/SkFontParameters.h" +#include "include/core/SkFontStyle.h" +#include "include/core/SkRefCnt.h" +#include "include/core/SkScalar.h" +#include "include/core/SkStream.h" +#include "include/core/SkTypeface.h" +#include "include/private/base/SkOnce.h" +#include "src/utils/mac/SkUniqueCFRef.h" + +#ifdef SK_BUILD_FOR_MAC +#import +#endif + +#ifdef SK_BUILD_FOR_IOS +#include +#include +#include +#include +#endif + +#include + +class SkData; +class SkDescriptor; +class SkFontData; +class SkFontDescriptor; +class SkScalerContext; +class SkString; +struct SkAdvancedTypefaceMetrics; +struct SkScalerContextEffects; +struct SkScalerContextRec; + +struct OpszVariation { + bool isSet = false; + double value = 0; +}; + +struct CTFontVariation { + SkUniqueCFRef variation; + SkUniqueCFRef wrongOpszVariation; + OpszVariation opsz; +}; + +SkUniqueCFRef SkCTFontCreateExactCopy(CTFontRef baseFont, CGFloat textSize, + OpszVariation opsz); + +SkFontStyle SkCTFontDescriptorGetSkFontStyle(CTFontDescriptorRef desc, bool fromDataProvider); + +CGFloat SkCTFontCTWeightForCSSWeight(int fontstyleWeight); +CGFloat SkCTFontCTWidthForCSSWidth(int fontstyleWidth); + +void SkStringFromCFString(CFStringRef src, SkString* dst); + +class SkTypeface_Mac : public SkTypeface { +private: + SkTypeface_Mac(SkUniqueCFRef fontRef, const SkFontStyle& fs, bool isFixedPitch, + OpszVariation opszVariation, std::unique_ptr providedData) + : SkTypeface(fs, isFixedPitch) + , fFontRef(std::move(fontRef)) + , fOpszVariation(opszVariation) + , fHasColorGlyphs( + SkToBool(CTFontGetSymbolicTraits(fFontRef.get()) & kCTFontColorGlyphsTrait)) + , fStream(std::move(providedData)) + , fIsFromStream(fStream) + { + SkASSERT(fFontRef); + } + +public: + static sk_sp Make(SkUniqueCFRef font, + OpszVariation opszVariation, + std::unique_ptr providedData); + + static constexpr SkTypeface::FactoryId FactoryId = SkSetFourByteTag('c','t','x','t'); + static sk_sp MakeFromStream(std::unique_ptr, const SkFontArguments&); + + SkUniqueCFRef fFontRef; + const OpszVariation fOpszVariation; + const bool fHasColorGlyphs; + + bool hasColorGlyphs() const override { return fHasColorGlyphs; } + + /** + * CTFontCopyVariationAxes provides the localized name of all axes, making it very slow. + * This is unfortunate, its result is needed just to see if there are any axes at all. + * To avoid calling internal APIs cache the result of CTFontCopyVariationAxes. + * https://github.com/WebKit/WebKit/commit/1842365d413ed87868e7d33d4fad1691fa3a8129 + * https://bugs.webkit.org/show_bug.cgi?id=232690 + */ + CFArrayRef getVariationAxes() const; + +protected: + int onGetUPEM() const override; + std::unique_ptr onOpenStream(int* ttcIndex) const override; + std::unique_ptr onOpenExistingStream(int* ttcIndex) const override; + bool onGlyphMaskNeedsCurrentColor() const override; + int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const override; + void onGetFamilyName(SkString* familyName) const override; + bool onGetPostScriptName(SkString*) const override; + SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override; + int onGetTableTags(SkFontTableTag tags[]) const override; + size_t onGetTableData(SkFontTableTag, size_t offset, size_t length, void* data) const override; + sk_sp onCopyTableData(SkFontTableTag) const override; + std::unique_ptr onCreateScalerContext(const SkScalerContextEffects&, + const SkDescriptor*) const override; + void onFilterRec(SkScalerContextRec*) const override; + void onGetFontDescriptor(SkFontDescriptor*, bool*) const override; + void getGlyphToUnicodeMap(SkUnichar*) const override; + std::unique_ptr onGetAdvancedMetrics() const override; + void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override; + int onCountGlyphs() const override; + void getPostScriptGlyphNames(SkString*) const override {} + int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const override; + sk_sp onMakeClone(const SkFontArguments&) const override; + + void* onGetCTFontRef() const override { return (void*)fFontRef.get(); } + +private: + mutable std::unique_ptr fStream; + mutable SkUniqueCFRef fVariationAxes; + bool fIsFromStream; + mutable SkOnce fInitStream; + mutable SkOnce fInitVariationAxes; + + using INHERITED = SkTypeface; +}; + +#endif +#endif //SkTypeface_mac_ct_DEFINED diff --git a/gfx/skia/skia/src/ports/SkTypeface_win_dw.cpp b/gfx/skia/skia/src/ports/SkTypeface_win_dw.cpp new file mode 100644 index 0000000000..c551466b27 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkTypeface_win_dw.cpp @@ -0,0 +1,1094 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/utils/win/SkDWriteNTDDI_VERSION.h" + +#include "include/core/SkTypes.h" +#if defined(SK_BUILD_FOR_WIN) + +#include "src/base/SkLeanWindows.h" + +// SkLeanWindows will include Windows.h, which will pull in all of the GDI defines. +// GDI #defines GetGlyphIndices to GetGlyphIndicesA or GetGlyphIndicesW, but +// IDWriteFontFace has a method called GetGlyphIndices. Since this file does +// not use GDI, undefing GetGlyphIndices makes things less confusing. +#undef GetGlyphIndices + +#include "include/core/SkData.h" +#include "include/private/base/SkTo.h" +#include "src/core/SkFontDescriptor.h" +#include "src/core/SkFontStream.h" +#include "src/core/SkScalerContext.h" +#include "src/ports/SkScalerContext_win_dw.h" +#include "src/ports/SkTypeface_win_dw.h" +#include "src/sfnt/SkOTTable_OS_2.h" +#include "src/sfnt/SkOTTable_fvar.h" +#include "src/sfnt/SkOTTable_head.h" +#include "src/sfnt/SkOTTable_hhea.h" +#include "src/sfnt/SkOTTable_post.h" +#include "src/sfnt/SkOTUtils.h" +#include "src/utils/win/SkDWrite.h" +#include "src/utils/win/SkDWriteFontFileStream.h" + +using namespace skia_private; + +HRESULT DWriteFontTypeface::initializePalette() { + if (!fIsColorFont) { + return S_OK; + } + + UINT32 dwPaletteCount = fDWriteFontFace2->GetColorPaletteCount(); + if (dwPaletteCount == 0) { + return S_OK; + } + + // Treat out of range palette index values as 0. Still apply overrides. + // https://www.w3.org/TR/css-fonts-4/#base-palette-desc + UINT32 basePaletteIndex = 0; + if (SkTFitsIn(fRequestedPalette.index) && + SkTo(fRequestedPalette.index) < dwPaletteCount) + { + basePaletteIndex = fRequestedPalette.index; + } + + UINT32 dwPaletteEntryCount = fDWriteFontFace2->GetPaletteEntryCount(); + AutoSTMalloc<8, DWRITE_COLOR_F> dwPaletteEntry(dwPaletteEntryCount); + HRM(fDWriteFontFace2->GetPaletteEntries(basePaletteIndex, + 0, dwPaletteEntryCount, + dwPaletteEntry), + "Could not retrieve palette entries."); + + fPalette.reset(new SkColor[dwPaletteEntryCount]); + for (UINT32 i = 0; i < dwPaletteEntryCount; ++i) { + fPalette[i] = SkColorSetARGB(sk_float_round2int(dwPaletteEntry[i].a * 255), + sk_float_round2int(dwPaletteEntry[i].r * 255), + sk_float_round2int(dwPaletteEntry[i].g * 255), + sk_float_round2int(dwPaletteEntry[i].b * 255)); + } + + for (int i = 0; i < fRequestedPalette.overrideCount; ++i) { + const SkFontArguments::Palette::Override& paletteOverride = fRequestedPalette.overrides[i]; + if (SkTFitsIn(paletteOverride.index) && + SkTo(paletteOverride.index) < dwPaletteEntryCount) + { + fPalette[paletteOverride.index] = paletteOverride.color; + } + } + fPaletteEntryCount = dwPaletteEntryCount; + + return S_OK; +} + +DWriteFontTypeface::DWriteFontTypeface(const SkFontStyle& style, + IDWriteFactory* factory, + IDWriteFontFace* fontFace, + IDWriteFont* font, + IDWriteFontFamily* fontFamily, + sk_sp loaders, + const SkFontArguments::Palette& palette) + : SkTypeface(style, false) + , fFactory(SkRefComPtr(factory)) + , fDWriteFontFamily(SkSafeRefComPtr(fontFamily)) + , fDWriteFont(SkSafeRefComPtr(font)) + , fDWriteFontFace(SkRefComPtr(fontFace)) + , fRequestedPaletteEntryOverrides(palette.overrideCount + ? (SkFontArguments::Palette::Override*)memcpy( + new SkFontArguments::Palette::Override[palette.overrideCount], + palette.overrides, + palette.overrideCount * sizeof(palette.overrides[0])) + : nullptr) + , fRequestedPalette{palette.index, + fRequestedPaletteEntryOverrides.get(), palette.overrideCount } + , fPaletteEntryCount(0) + , fLoaders(std::move(loaders)) + , fRenderingMode(DWRITE_RENDERING_MODE_DEFAULT) + , fGamma(2.2f) + , fContrast(1.0f) + , fClearTypeLevel(1.0f) +{ + if (!SUCCEEDED(fDWriteFontFace->QueryInterface(&fDWriteFontFace1))) { + // IUnknown::QueryInterface states that if it fails, punk will be set to nullptr. + // http://blogs.msdn.com/b/oldnewthing/archive/2004/03/26/96777.aspx + SkASSERT_RELEASE(nullptr == fDWriteFontFace1.get()); + } + if (!SUCCEEDED(fDWriteFontFace->QueryInterface(&fDWriteFontFace2))) { + SkASSERT_RELEASE(nullptr == fDWriteFontFace2.get()); + } + if (!SUCCEEDED(fDWriteFontFace->QueryInterface(&fDWriteFontFace4))) { + SkASSERT_RELEASE(nullptr == fDWriteFontFace4.get()); + } + if (!SUCCEEDED(fFactory->QueryInterface(&fFactory2))) { + SkASSERT_RELEASE(nullptr == fFactory2.get()); + } + + if (fDWriteFontFace1 && fDWriteFontFace1->IsMonospacedFont()) { + this->setIsFixedPitch(true); + } + + fIsColorFont = fFactory2 && fDWriteFontFace2 && fDWriteFontFace2->IsColorFont(); + this->initializePalette(); +} + +DWriteFontTypeface::~DWriteFontTypeface() = default; + +DWriteFontTypeface::Loaders::~Loaders() { + // Don't return if any fail, just keep going to free up as much as possible. + HRESULT hr; + + hr = fFactory->UnregisterFontCollectionLoader(fDWriteFontCollectionLoader.get()); + if (FAILED(hr)) { + SK_TRACEHR(hr, "FontCollectionLoader"); + } + + hr = fFactory->UnregisterFontFileLoader(fDWriteFontFileLoader.get()); + if (FAILED(hr)) { + SK_TRACEHR(hr, "FontFileLoader"); + } +} + +void DWriteFontTypeface::onGetFamilyName(SkString* familyName) const { + SkTScopedComPtr familyNames; + HRV(fDWriteFontFamily->GetFamilyNames(&familyNames)); + + sk_get_locale_string(familyNames.get(), nullptr/*fMgr->fLocaleName.get()*/, familyName); +} + +bool DWriteFontTypeface::onGetPostScriptName(SkString* skPostScriptName) const { + SkString localSkPostScriptName; + SkTScopedComPtr postScriptNames; + BOOL exists = FALSE; + if (FAILED(fDWriteFont->GetInformationalStrings( + DWRITE_INFORMATIONAL_STRING_POSTSCRIPT_NAME, + &postScriptNames, + &exists)) || + !exists || + FAILED(sk_get_locale_string(postScriptNames.get(), nullptr, &localSkPostScriptName))) + { + return false; + } + if (skPostScriptName) { + *skPostScriptName = localSkPostScriptName; + } + return true; +} + +void DWriteFontTypeface::onGetFontDescriptor(SkFontDescriptor* desc, + bool* serialize) const { + // Get the family name. + SkTScopedComPtr familyNames; + HRV(fDWriteFontFamily->GetFamilyNames(&familyNames)); + + SkString utf8FamilyName; + sk_get_locale_string(familyNames.get(), nullptr/*fMgr->fLocaleName.get()*/, &utf8FamilyName); + + desc->setFamilyName(utf8FamilyName.c_str()); + desc->setStyle(this->fontStyle()); + + desc->setPaletteIndex(fRequestedPalette.index); + sk_careful_memcpy(desc->setPaletteEntryOverrides(fRequestedPalette.overrideCount), + fRequestedPalette.overrides, + fRequestedPalette.overrideCount * sizeof(fRequestedPalette.overrides[0])); + + desc->setFactoryId(FactoryId); + *serialize = SkToBool(fLoaders); +} + +void DWriteFontTypeface::onCharsToGlyphs(const SkUnichar* uni, int count, + SkGlyphID glyphs[]) const { + fDWriteFontFace->GetGlyphIndices((const UINT32*)uni, count, glyphs); +} + +int DWriteFontTypeface::onCountGlyphs() const { + return fDWriteFontFace->GetGlyphCount(); +} + +void DWriteFontTypeface::getPostScriptGlyphNames(SkString*) const {} + +int DWriteFontTypeface::onGetUPEM() const { + DWRITE_FONT_METRICS metrics; + fDWriteFontFace->GetMetrics(&metrics); + return metrics.designUnitsPerEm; +} + +class LocalizedStrings_IDWriteLocalizedStrings : public SkTypeface::LocalizedStrings { +public: + /** Takes ownership of the IDWriteLocalizedStrings. */ + explicit LocalizedStrings_IDWriteLocalizedStrings(IDWriteLocalizedStrings* strings) + : fIndex(0), fStrings(strings) + { } + + bool next(SkTypeface::LocalizedString* localizedString) override { + if (fIndex >= fStrings->GetCount()) { + return false; + } + + // String + UINT32 stringLen; + HRBM(fStrings->GetStringLength(fIndex, &stringLen), "Could not get string length."); + + SkSMallocWCHAR wString(static_cast(stringLen)+1); + HRBM(fStrings->GetString(fIndex, wString.get(), stringLen+1), "Could not get string."); + + HRB(sk_wchar_to_skstring(wString.get(), stringLen, &localizedString->fString)); + + // Locale + UINT32 localeLen; + HRBM(fStrings->GetLocaleNameLength(fIndex, &localeLen), "Could not get locale length."); + + SkSMallocWCHAR wLocale(static_cast(localeLen)+1); + HRBM(fStrings->GetLocaleName(fIndex, wLocale.get(), localeLen+1), "Could not get locale."); + + HRB(sk_wchar_to_skstring(wLocale.get(), localeLen, &localizedString->fLanguage)); + + ++fIndex; + return true; + } + +private: + UINT32 fIndex; + SkTScopedComPtr fStrings; +}; + +SkTypeface::LocalizedStrings* DWriteFontTypeface::onCreateFamilyNameIterator() const { + sk_sp nameIter = + SkOTUtils::LocalizedStrings_NameTable::MakeForFamilyNames(*this); + if (!nameIter) { + SkTScopedComPtr familyNames; + HRNM(fDWriteFontFamily->GetFamilyNames(&familyNames), "Could not obtain family names."); + nameIter = sk_make_sp(familyNames.release()); + } + return nameIter.release(); +} + +bool DWriteFontTypeface::onGlyphMaskNeedsCurrentColor() const { + return fDWriteFontFace2 && fDWriteFontFace2->GetColorPaletteCount() > 0; +} + +int DWriteFontTypeface::onGetVariationDesignPosition( + SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) const +{ + +#if defined(NTDDI_WIN10_RS3) && NTDDI_VERSION >= NTDDI_WIN10_RS3 + + SkTScopedComPtr fontFace5; + if (FAILED(fDWriteFontFace->QueryInterface(&fontFace5))) { + return -1; + } + + // Return 0 if the font is not variable font. + if (!fontFace5->HasVariations()) { + return 0; + } + + UINT32 fontAxisCount = fontFace5->GetFontAxisValueCount(); + SkTScopedComPtr fontResource; + HR_GENERAL(fontFace5->GetFontResource(&fontResource), nullptr, -1); + UINT32 variableAxisCount = 0; + for (UINT32 i = 0; i < fontAxisCount; ++i) { + if (fontResource->GetFontAxisAttributes(i) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) { + ++variableAxisCount; + } + } + + if (!coordinates || coordinateCount < 0 || (unsigned)coordinateCount < variableAxisCount) { + return SkTo(variableAxisCount); + } + + AutoSTMalloc<8, DWRITE_FONT_AXIS_VALUE> fontAxisValue(fontAxisCount); + HR_GENERAL(fontFace5->GetFontAxisValues(fontAxisValue.get(), fontAxisCount), nullptr, -1); + UINT32 coordIndex = 0; + for (UINT32 axisIndex = 0; axisIndex < fontAxisCount; ++axisIndex) { + if (fontResource->GetFontAxisAttributes(axisIndex) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) { + coordinates[coordIndex].axis = SkEndian_SwapBE32(fontAxisValue[axisIndex].axisTag); + coordinates[coordIndex].value = fontAxisValue[axisIndex].value; + ++coordIndex; + } + } + + SkASSERT(coordIndex == variableAxisCount); + return SkTo(variableAxisCount); + +#else + return -1; +#endif +} + +int DWriteFontTypeface::onGetVariationDesignParameters( + SkFontParameters::Variation::Axis parameters[], int parameterCount) const +{ + +#if defined(NTDDI_WIN10_RS3) && NTDDI_VERSION >= NTDDI_WIN10_RS3 + + SkTScopedComPtr fontFace5; + if (FAILED(fDWriteFontFace->QueryInterface(&fontFace5))) { + return -1; + } + + // Return 0 if the font is not variable font. + if (!fontFace5->HasVariations()) { + return 0; + } + + UINT32 fontAxisCount = fontFace5->GetFontAxisValueCount(); + SkTScopedComPtr fontResource; + HR_GENERAL(fontFace5->GetFontResource(&fontResource), nullptr, -1); + int variableAxisCount = 0; + for (UINT32 i = 0; i < fontAxisCount; ++i) { + if (fontResource->GetFontAxisAttributes(i) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) { + variableAxisCount++; + } + } + + if (!parameters || parameterCount < variableAxisCount) { + return variableAxisCount; + } + + AutoSTMalloc<8, DWRITE_FONT_AXIS_RANGE> fontAxisRange(fontAxisCount); + HR_GENERAL(fontResource->GetFontAxisRanges(fontAxisRange.get(), fontAxisCount), nullptr, -1); + AutoSTMalloc<8, DWRITE_FONT_AXIS_VALUE> fontAxisDefaultValue(fontAxisCount); + HR_GENERAL(fontResource->GetDefaultFontAxisValues(fontAxisDefaultValue.get(), fontAxisCount), + nullptr, -1); + UINT32 coordIndex = 0; + + for (UINT32 axisIndex = 0; axisIndex < fontAxisCount; ++axisIndex) { + if (fontResource->GetFontAxisAttributes(axisIndex) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) { + parameters[coordIndex].tag = SkEndian_SwapBE32(fontAxisDefaultValue[axisIndex].axisTag); + parameters[coordIndex].min = fontAxisRange[axisIndex].minValue; + parameters[coordIndex].def = fontAxisDefaultValue[axisIndex].value; + parameters[coordIndex].max = fontAxisRange[axisIndex].maxValue; + parameters[coordIndex].setHidden(fontResource->GetFontAxisAttributes(axisIndex) & + DWRITE_FONT_AXIS_ATTRIBUTES_HIDDEN); + ++coordIndex; + } + } + + return variableAxisCount; + +#else + return -1; +#endif +} + +int DWriteFontTypeface::onGetTableTags(SkFontTableTag tags[]) const { + DWRITE_FONT_FACE_TYPE type = fDWriteFontFace->GetType(); + if (type != DWRITE_FONT_FACE_TYPE_CFF && + type != DWRITE_FONT_FACE_TYPE_TRUETYPE && + type != DWRITE_FONT_FACE_TYPE_TRUETYPE_COLLECTION) + { + return 0; + } + + int ttcIndex; + std::unique_ptr stream = this->openStream(&ttcIndex); + return stream.get() ? SkFontStream::GetTableTags(stream.get(), ttcIndex, tags) : 0; +} + +size_t DWriteFontTypeface::onGetTableData(SkFontTableTag tag, size_t offset, + size_t length, void* data) const +{ + AutoDWriteTable table(fDWriteFontFace.get(), SkEndian_SwapBE32(tag)); + if (!table.fExists) { + return 0; + } + + if (offset > table.fSize) { + return 0; + } + size_t size = std::min(length, table.fSize - offset); + if (data) { + memcpy(data, table.fData + offset, size); + } + + return size; +} + +sk_sp DWriteFontTypeface::onCopyTableData(SkFontTableTag tag) const { + const uint8_t* data; + UINT32 size; + void* lock; + BOOL exists; + fDWriteFontFace->TryGetFontTable(SkEndian_SwapBE32(tag), + reinterpret_cast(&data), &size, &lock, &exists); + if (!exists) { + return nullptr; + } + struct Context { + Context(void* lock, IDWriteFontFace* face) : fLock(lock), fFontFace(SkRefComPtr(face)) {} + ~Context() { fFontFace->ReleaseFontTable(fLock); } + void* fLock; + SkTScopedComPtr fFontFace; + }; + return SkData::MakeWithProc(data, size, + [](const void*, void* ctx) { delete (Context*)ctx; }, + new Context(lock, fDWriteFontFace.get())); +} + +sk_sp DWriteFontTypeface::onMakeClone(const SkFontArguments& args) const { + // Skip if the current face index does not match the ttcIndex + if (fDWriteFontFace->GetIndex() != SkTo(args.getCollectionIndex())) { + return sk_ref_sp(this); + } + +#if defined(NTDDI_WIN10_RS3) && NTDDI_VERSION >= NTDDI_WIN10_RS3 + + SkTScopedComPtr fontFace5; + + if (SUCCEEDED(fDWriteFontFace->QueryInterface(&fontFace5)) && fontFace5->HasVariations()) { + UINT32 fontAxisCount = fontFace5->GetFontAxisValueCount(); + UINT32 argsCoordCount = args.getVariationDesignPosition().coordinateCount; + AutoSTMalloc<8, DWRITE_FONT_AXIS_VALUE> fontAxisValue(fontAxisCount); + HRN(fontFace5->GetFontAxisValues(fontAxisValue.get(), fontAxisCount)); + + for (UINT32 fontIndex = 0; fontIndex < fontAxisCount; ++fontIndex) { + for (UINT32 argsIndex = 0; argsIndex < argsCoordCount; ++argsIndex) { + if (SkEndian_SwapBE32(fontAxisValue[fontIndex].axisTag) == + args.getVariationDesignPosition().coordinates[argsIndex].axis) { + fontAxisValue[fontIndex].value = + args.getVariationDesignPosition().coordinates[argsIndex].value; + } + } + } + SkTScopedComPtr fontResource; + HRN(fontFace5->GetFontResource(&fontResource)); + SkTScopedComPtr newFontFace5; + HRN(fontResource->CreateFontFace(fDWriteFont->GetSimulations(), + fontAxisValue.get(), + fontAxisCount, + &newFontFace5)); + + SkTScopedComPtr newFontFace; + HRN(newFontFace5->QueryInterface(&newFontFace)); + return DWriteFontTypeface::Make(fFactory.get(), + newFontFace.get(), + fDWriteFont.get(), + fDWriteFontFamily.get(), + fLoaders, + args.getPalette()); + } + +#endif + + // If the palette args have changed, a new font will need to be created. + if (args.getPalette().index != fRequestedPalette.index || + args.getPalette().overrideCount != fRequestedPalette.overrideCount || + memcmp(args.getPalette().overrides, fRequestedPalette.overrides, + fRequestedPalette.overrideCount * sizeof(fRequestedPalette.overrides[0]))) + { + return DWriteFontTypeface::Make(fFactory.get(), + fDWriteFontFace.get(), + fDWriteFont.get(), + fDWriteFontFamily.get(), + fLoaders, + args.getPalette()); + } + + return sk_ref_sp(this); +} + +std::unique_ptr DWriteFontTypeface::onOpenStream(int* ttcIndex) const { + *ttcIndex = fDWriteFontFace->GetIndex(); + + UINT32 numFiles = 0; + HRNM(fDWriteFontFace->GetFiles(&numFiles, nullptr), + "Could not get number of font files."); + if (numFiles != 1) { + return nullptr; + } + + SkTScopedComPtr fontFile; + HRNM(fDWriteFontFace->GetFiles(&numFiles, &fontFile), "Could not get font files."); + + const void* fontFileKey; + UINT32 fontFileKeySize; + HRNM(fontFile->GetReferenceKey(&fontFileKey, &fontFileKeySize), + "Could not get font file reference key."); + + SkTScopedComPtr fontFileLoader; + HRNM(fontFile->GetLoader(&fontFileLoader), "Could not get font file loader."); + + SkTScopedComPtr fontFileStream; + HRNM(fontFileLoader->CreateStreamFromKey(fontFileKey, fontFileKeySize, + &fontFileStream), + "Could not create font file stream."); + + return std::unique_ptr(new SkDWriteFontFileStream(fontFileStream.get())); +} + +std::unique_ptr DWriteFontTypeface::onCreateScalerContext( + const SkScalerContextEffects& effects, const SkDescriptor* desc) const +{ + return std::make_unique( + sk_ref_sp(const_cast(this)), effects, desc); +} + +void DWriteFontTypeface::onFilterRec(SkScalerContextRec* rec) const { + if (rec->fFlags & SkScalerContext::kLCD_Vertical_Flag) { + rec->fMaskFormat = SkMask::kA8_Format; + rec->fFlags |= SkScalerContext::kGenA8FromLCD_Flag; + } + + unsigned flagsWeDontSupport = SkScalerContext::kForceAutohinting_Flag | + SkScalerContext::kEmbolden_Flag | + SkScalerContext::kLCD_Vertical_Flag; + rec->fFlags &= ~flagsWeDontSupport; + + SkFontHinting h = rec->getHinting(); + // DirectWrite2 allows for hinting to be turned off. Force everything else to normal. + if (h != SkFontHinting::kNone || !fFactory2 || !fDWriteFontFace2) { + h = SkFontHinting::kNormal; + } + rec->setHinting(h); + +#if defined(SK_FONT_HOST_USE_SYSTEM_SETTINGS) + IDWriteFactory* factory = sk_get_dwrite_factory(); + if (factory != nullptr) { + SkTScopedComPtr defaultRenderingParams; + if (SUCCEEDED(factory->CreateRenderingParams(&defaultRenderingParams))) { + float gamma = defaultRenderingParams->GetGamma(); + rec->setDeviceGamma(gamma); + rec->setPaintGamma(gamma); + + rec->setContrast(defaultRenderingParams->GetEnhancedContrast()); + } + } +#elif defined(MOZ_SKIA) + rec->setContrast(fContrast); + + rec->setDeviceGamma(fGamma); + rec->setPaintGamma(fGamma); +#endif +} + +/////////////////////////////////////////////////////////////////////////////// +//PDF Support + +static void glyph_to_unicode_map(IDWriteFontFace* fontFace, DWRITE_UNICODE_RANGE range, + UINT32* remainingGlyphCount, UINT32 numGlyphs, + SkUnichar* glyphToUnicode) +{ + constexpr const int batchSize = 128; + UINT32 codepoints[batchSize]; + UINT16 glyphs[batchSize]; + for (UINT32 c = range.first; c <= range.last && *remainingGlyphCount != 0; c += batchSize) { + UINT32 numBatchedCodePoints = std::min(range.last - c + 1, batchSize); + for (UINT32 i = 0; i < numBatchedCodePoints; ++i) { + codepoints[i] = c + i; + } + HRVM(fontFace->GetGlyphIndices(codepoints, numBatchedCodePoints, glyphs), + "Failed to get glyph indexes."); + for (UINT32 i = 0; i < numBatchedCodePoints; ++i) { + UINT16 glyph = glyphs[i]; + // Intermittent DW bug on Windows 10. See crbug.com/470146. + if (glyph >= numGlyphs) { + return; + } + if (0 < glyph && glyphToUnicode[glyph] == 0) { + glyphToUnicode[glyph] = c + i; // Always use lowest-index unichar. + --*remainingGlyphCount; + } + } + } +} + +void DWriteFontTypeface::getGlyphToUnicodeMap(SkUnichar* glyphToUnicode) const { + IDWriteFontFace* face = fDWriteFontFace.get(); + UINT32 numGlyphs = face->GetGlyphCount(); + sk_bzero(glyphToUnicode, sizeof(SkUnichar) * numGlyphs); + UINT32 remainingGlyphCount = numGlyphs; + + if (fDWriteFontFace1) { + IDWriteFontFace1* face1 = fDWriteFontFace1.get(); + UINT32 numRanges = 0; + HRESULT hr = face1->GetUnicodeRanges(0, nullptr, &numRanges); + if (hr != E_NOT_SUFFICIENT_BUFFER && FAILED(hr)) { + HRVM(hr, "Failed to get number of ranges."); + } + std::unique_ptr ranges(new DWRITE_UNICODE_RANGE[numRanges]); + HRVM(face1->GetUnicodeRanges(numRanges, ranges.get(), &numRanges), "Failed to get ranges."); + for (UINT32 i = 0; i < numRanges; ++i) { + glyph_to_unicode_map(face1, ranges[i], &remainingGlyphCount, numGlyphs, glyphToUnicode); + } + } else { + glyph_to_unicode_map(face, {0, 0x10FFFF}, &remainingGlyphCount, numGlyphs, glyphToUnicode); + } +} + +std::unique_ptr DWriteFontTypeface::onGetAdvancedMetrics() const { + + std::unique_ptr info(nullptr); + + DWRITE_FONT_METRICS dwfm; + fDWriteFontFace->GetMetrics(&dwfm); + + info.reset(new SkAdvancedTypefaceMetrics); + + info->fAscent = SkToS16(dwfm.ascent); + info->fDescent = SkToS16(dwfm.descent); + info->fCapHeight = SkToS16(dwfm.capHeight); + + { + SkTScopedComPtr postScriptNames; + BOOL exists = FALSE; + if (FAILED(fDWriteFont->GetInformationalStrings( + DWRITE_INFORMATIONAL_STRING_POSTSCRIPT_NAME, + &postScriptNames, + &exists)) || + !exists || + FAILED(sk_get_locale_string(postScriptNames.get(), nullptr, &info->fPostScriptName))) + { + SkDEBUGF("Unable to get postscript name for typeface %p\n", this); + } + } + + // SkAdvancedTypefaceMetrics::fFontName must actually be a family name. + SkTScopedComPtr familyNames; + if (FAILED(fDWriteFontFamily->GetFamilyNames(&familyNames)) || + FAILED(sk_get_locale_string(familyNames.get(), nullptr, &info->fFontName))) + { + SkDEBUGF("Unable to get family name for typeface 0x%p\n", this); + } + if (info->fPostScriptName.isEmpty()) { + info->fPostScriptName = info->fFontName; + } + + DWRITE_FONT_FACE_TYPE fontType = fDWriteFontFace->GetType(); + if (fontType != DWRITE_FONT_FACE_TYPE_TRUETYPE && + fontType != DWRITE_FONT_FACE_TYPE_TRUETYPE_COLLECTION) + { + return info; + } + + // Simulated fonts aren't really TrueType fonts. + if (fDWriteFontFace->GetSimulations() == DWRITE_FONT_SIMULATIONS_NONE) { + info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; + } + + AutoTDWriteTable headTable(fDWriteFontFace.get()); + AutoTDWriteTable postTable(fDWriteFontFace.get()); + AutoTDWriteTable hheaTable(fDWriteFontFace.get()); + AutoTDWriteTable os2Table(fDWriteFontFace.get()); + if (!headTable.fExists || !postTable.fExists || !hheaTable.fExists || !os2Table.fExists) { + return info; + } + + SkOTUtils::SetAdvancedTypefaceFlags(os2Table->version.v4.fsType, info.get()); + + // There are versions of DirectWrite which support named instances for system variation fonts, + // but no means to indicate that such a typeface is a variation. + AutoTDWriteTable fvarTable(fDWriteFontFace.get()); + if (fvarTable.fExists) { + info->fFlags |= SkAdvancedTypefaceMetrics::kVariable_FontFlag; + } + + //There exist CJK fonts which set the IsFixedPitch and Monospace bits, + //but have full width, latin half-width, and half-width kana. + bool fixedWidth = (postTable->isFixedPitch && + (1 == SkEndian_SwapBE16(hheaTable->numberOfHMetrics))); + //Monospace + if (fixedWidth) { + info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; + } + //Italic + if (os2Table->version.v0.fsSelection.field.Italic) { + info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; + } + //Serif + using SerifStyle = SkPanose::Data::TextAndDisplay::SerifStyle; + SerifStyle serifStyle = os2Table->version.v0.panose.data.textAndDisplay.bSerifStyle; + if (SkPanose::FamilyType::TextAndDisplay == os2Table->version.v0.panose.bFamilyType) { + if (SerifStyle::Cove == serifStyle || + SerifStyle::ObtuseCove == serifStyle || + SerifStyle::SquareCove == serifStyle || + SerifStyle::ObtuseSquareCove == serifStyle || + SerifStyle::Square == serifStyle || + SerifStyle::Thin == serifStyle || + SerifStyle::Bone == serifStyle || + SerifStyle::Exaggerated == serifStyle || + SerifStyle::Triangle == serifStyle) + { + info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; + } + //Script + } else if (SkPanose::FamilyType::Script == os2Table->version.v0.panose.bFamilyType) { + info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; + } + + info->fItalicAngle = SkEndian_SwapBE32(postTable->italicAngle) >> 16; + + info->fBBox = SkIRect::MakeLTRB((int32_t)SkEndian_SwapBE16((uint16_t)headTable->xMin), + (int32_t)SkEndian_SwapBE16((uint16_t)headTable->yMax), + (int32_t)SkEndian_SwapBE16((uint16_t)headTable->xMax), + (int32_t)SkEndian_SwapBE16((uint16_t)headTable->yMin)); + return info; +} + +class StreamFontFileLoader : public IDWriteFontFileLoader { +public: + // IUnknown methods + SK_STDMETHODIMP QueryInterface(REFIID iid, void** ppvObject) override; + SK_STDMETHODIMP_(ULONG) AddRef() override; + SK_STDMETHODIMP_(ULONG) Release() override; + + // IDWriteFontFileLoader methods + SK_STDMETHODIMP CreateStreamFromKey( + void const* fontFileReferenceKey, + UINT32 fontFileReferenceKeySize, + IDWriteFontFileStream** fontFileStream) override; + + // Takes ownership of stream. + static HRESULT Create(std::unique_ptr stream, + StreamFontFileLoader** streamFontFileLoader) { + *streamFontFileLoader = new StreamFontFileLoader(std::move(stream)); + if (nullptr == *streamFontFileLoader) { + return E_OUTOFMEMORY; + } + return S_OK; + } + +private: + StreamFontFileLoader(std::unique_ptr stream) + : fStream(std::move(stream)), fRefCount(1) + {} + virtual ~StreamFontFileLoader() { } + + std::unique_ptr fStream; + ULONG fRefCount; +}; + +SK_STDMETHODIMP StreamFontFileLoader::QueryInterface(REFIID iid, void** ppvObject) { + if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileLoader)) { + *ppvObject = this; + AddRef(); + return S_OK; + } else { + *ppvObject = nullptr; + return E_NOINTERFACE; + } +} + +SK_STDMETHODIMP_(ULONG) StreamFontFileLoader::AddRef() { + return InterlockedIncrement(&fRefCount); +} + +SK_STDMETHODIMP_(ULONG) StreamFontFileLoader::Release() { + ULONG newCount = InterlockedDecrement(&fRefCount); + if (0 == newCount) { + delete this; + } + return newCount; +} + +SK_STDMETHODIMP StreamFontFileLoader::CreateStreamFromKey( + void const* fontFileReferenceKey, + UINT32 fontFileReferenceKeySize, + IDWriteFontFileStream** fontFileStream) +{ + SkTScopedComPtr stream; + HR(SkDWriteFontFileStreamWrapper::Create(fStream->duplicate().release(), &stream)); + *fontFileStream = stream.release(); + return S_OK; +} + +class StreamFontFileEnumerator : public IDWriteFontFileEnumerator { +public: + // IUnknown methods + SK_STDMETHODIMP QueryInterface(REFIID iid, void** ppvObject) override; + SK_STDMETHODIMP_(ULONG) AddRef() override; + SK_STDMETHODIMP_(ULONG) Release() override; + + // IDWriteFontFileEnumerator methods + SK_STDMETHODIMP MoveNext(BOOL* hasCurrentFile) override; + SK_STDMETHODIMP GetCurrentFontFile(IDWriteFontFile** fontFile) override; + + static HRESULT Create(IDWriteFactory* factory, IDWriteFontFileLoader* fontFileLoader, + StreamFontFileEnumerator** streamFontFileEnumerator) { + *streamFontFileEnumerator = new StreamFontFileEnumerator(factory, fontFileLoader); + if (nullptr == *streamFontFileEnumerator) { + return E_OUTOFMEMORY; + } + return S_OK; + } +private: + StreamFontFileEnumerator(IDWriteFactory* factory, IDWriteFontFileLoader* fontFileLoader); + virtual ~StreamFontFileEnumerator() { } + + ULONG fRefCount; + + SkTScopedComPtr fFactory; + SkTScopedComPtr fCurrentFile; + SkTScopedComPtr fFontFileLoader; + bool fHasNext; +}; + +StreamFontFileEnumerator::StreamFontFileEnumerator(IDWriteFactory* factory, + IDWriteFontFileLoader* fontFileLoader) + : fRefCount(1) + , fFactory(SkRefComPtr(factory)) + , fCurrentFile() + , fFontFileLoader(SkRefComPtr(fontFileLoader)) + , fHasNext(true) +{ } + +SK_STDMETHODIMP StreamFontFileEnumerator::QueryInterface(REFIID iid, void** ppvObject) { + if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontFileEnumerator)) { + *ppvObject = this; + AddRef(); + return S_OK; + } else { + *ppvObject = nullptr; + return E_NOINTERFACE; + } +} + +SK_STDMETHODIMP_(ULONG) StreamFontFileEnumerator::AddRef() { + return InterlockedIncrement(&fRefCount); +} + +SK_STDMETHODIMP_(ULONG) StreamFontFileEnumerator::Release() { + ULONG newCount = InterlockedDecrement(&fRefCount); + if (0 == newCount) { + delete this; + } + return newCount; +} + +SK_STDMETHODIMP StreamFontFileEnumerator::MoveNext(BOOL* hasCurrentFile) { + *hasCurrentFile = FALSE; + + if (!fHasNext) { + return S_OK; + } + fHasNext = false; + + UINT32 fontFileReferenceKey = 0; + HR(fFactory->CreateCustomFontFileReference( + &fontFileReferenceKey, //cannot be nullptr + sizeof(fontFileReferenceKey), //even if this is 0 + fFontFileLoader.get(), + &fCurrentFile)); + + *hasCurrentFile = TRUE; + return S_OK; +} + +SK_STDMETHODIMP StreamFontFileEnumerator::GetCurrentFontFile(IDWriteFontFile** fontFile) { + if (fCurrentFile.get() == nullptr) { + *fontFile = nullptr; + return E_FAIL; + } + + *fontFile = SkRefComPtr(fCurrentFile.get()); + return S_OK; +} + +class StreamFontCollectionLoader : public IDWriteFontCollectionLoader { +public: + // IUnknown methods + SK_STDMETHODIMP QueryInterface(REFIID iid, void** ppvObject) override; + SK_STDMETHODIMP_(ULONG) AddRef() override; + SK_STDMETHODIMP_(ULONG) Release() override; + + // IDWriteFontCollectionLoader methods + SK_STDMETHODIMP CreateEnumeratorFromKey( + IDWriteFactory* factory, + void const* collectionKey, + UINT32 collectionKeySize, + IDWriteFontFileEnumerator** fontFileEnumerator) override; + + static HRESULT Create(IDWriteFontFileLoader* fontFileLoader, + StreamFontCollectionLoader** streamFontCollectionLoader) { + *streamFontCollectionLoader = new StreamFontCollectionLoader(fontFileLoader); + if (nullptr == *streamFontCollectionLoader) { + return E_OUTOFMEMORY; + } + return S_OK; + } +private: + StreamFontCollectionLoader(IDWriteFontFileLoader* fontFileLoader) + : fRefCount(1) + , fFontFileLoader(SkRefComPtr(fontFileLoader)) + { } + virtual ~StreamFontCollectionLoader() { } + + ULONG fRefCount; + SkTScopedComPtr fFontFileLoader; +}; + +SK_STDMETHODIMP StreamFontCollectionLoader::QueryInterface(REFIID iid, void** ppvObject) { + if (iid == IID_IUnknown || iid == __uuidof(IDWriteFontCollectionLoader)) { + *ppvObject = this; + AddRef(); + return S_OK; + } else { + *ppvObject = nullptr; + return E_NOINTERFACE; + } +} + +SK_STDMETHODIMP_(ULONG) StreamFontCollectionLoader::AddRef() { + return InterlockedIncrement(&fRefCount); +} + +SK_STDMETHODIMP_(ULONG) StreamFontCollectionLoader::Release() { + ULONG newCount = InterlockedDecrement(&fRefCount); + if (0 == newCount) { + delete this; + } + return newCount; +} + +template class SkAutoIDWriteUnregister { +public: + SkAutoIDWriteUnregister(IDWriteFactory* factory, T* unregister) + : fFactory(factory), fUnregister(unregister) + { } + SkAutoIDWriteUnregister(const SkAutoIDWriteUnregister&) = delete; + SkAutoIDWriteUnregister& operator=(const SkAutoIDWriteUnregister&) = delete; + SkAutoIDWriteUnregister(SkAutoIDWriteUnregister&&) = delete; + SkAutoIDWriteUnregister& operator=(SkAutoIDWriteUnregister&&) = delete; + + ~SkAutoIDWriteUnregister() { + if (fUnregister) { + unregister(fFactory, fUnregister); + } + } + + T* detatch() { + T* old = fUnregister; + fUnregister = nullptr; + return old; + } + +private: + HRESULT unregister(IDWriteFactory* factory, IDWriteFontFileLoader* unregister) { + return factory->UnregisterFontFileLoader(unregister); + } + + HRESULT unregister(IDWriteFactory* factory, IDWriteFontCollectionLoader* unregister) { + return factory->UnregisterFontCollectionLoader(unregister); + } + + IDWriteFactory* fFactory; + T* fUnregister; +}; + +SK_STDMETHODIMP StreamFontCollectionLoader::CreateEnumeratorFromKey( + IDWriteFactory* factory, + void const* collectionKey, + UINT32 collectionKeySize, + IDWriteFontFileEnumerator** fontFileEnumerator) +{ + SkTScopedComPtr enumerator; + HR(StreamFontFileEnumerator::Create(factory, fFontFileLoader.get(), &enumerator)); + *fontFileEnumerator = enumerator.release(); + return S_OK; +} + +static HRESULT apply_fontargument_variation(SkTScopedComPtr& fontFace, + const SkFontArguments& args) +{ +#if defined(NTDDI_WIN10_RS3) && NTDDI_VERSION >= NTDDI_WIN10_RS3 + + SkTScopedComPtr fontFace5; + if (FAILED(fontFace->QueryInterface(&fontFace5)) || !fontFace5->HasVariations()) { + return S_OK; + } + + UINT32 fontAxisCount = fontFace5->GetFontAxisValueCount(); + UINT32 argsCoordCount = args.getVariationDesignPosition().coordinateCount; + AutoSTMalloc<8, DWRITE_FONT_AXIS_VALUE> variation(fontAxisCount); + SkTScopedComPtr fontResource; + HR(fontFace5->GetFontResource(&fontResource)); + HR(fontResource->GetDefaultFontAxisValues(variation, fontAxisCount)); + + for (UINT32 fontAxisIndex = 0; fontAxisIndex < fontAxisCount; ++fontAxisIndex) { + DWRITE_FONT_AXIS_VALUE& fontCoordinate = variation[fontAxisIndex]; + + for (UINT32 argsCoordIndex = argsCoordCount; argsCoordIndex --> 0;) { + const SkFontArguments::VariationPosition::Coordinate& argsCoordinate = + args.getVariationDesignPosition().coordinates[argsCoordIndex]; + if (SkEndian_SwapBE32(fontCoordinate.axisTag) == argsCoordinate.axis) { + fontCoordinate.value = argsCoordinate.value; + break; + } + } + } + + SkTScopedComPtr fontFace5_Out; + HR(fontResource->CreateFontFace(DWRITE_FONT_SIMULATIONS_NONE, + variation.get(), fontAxisCount, + &fontFace5_Out)); + fontFace.reset(); + HR(fontFace5_Out->QueryInterface(&fontFace)); +#endif + return S_OK; +} + +sk_sp DWriteFontTypeface::MakeFromStream(std::unique_ptr stream, + const SkFontArguments& args) { + // TODO: do we need to use some user provided factory? + IDWriteFactory* factory = sk_get_dwrite_factory(); + if (nullptr == factory) { + return nullptr; + } + + SkTScopedComPtr fontFileLoader; + HRN(StreamFontFileLoader::Create(std::move(stream), &fontFileLoader)); + HRN(factory->RegisterFontFileLoader(fontFileLoader.get())); + SkAutoIDWriteUnregister autoUnregisterFontFileLoader( + factory, fontFileLoader.get()); + + SkTScopedComPtr fontCollectionLoader; + HRN(StreamFontCollectionLoader::Create(fontFileLoader.get(), &fontCollectionLoader)); + HRN(factory->RegisterFontCollectionLoader(fontCollectionLoader.get())); + SkAutoIDWriteUnregister autoUnregisterFontCollectionLoader( + factory, fontCollectionLoader.get()); + + SkTScopedComPtr fontCollection; + HRN(factory->CreateCustomFontCollection(fontCollectionLoader.get(), nullptr, 0, + &fontCollection)); + + // Find the first non-simulated font which has the given ttc index. + UINT32 familyCount = fontCollection->GetFontFamilyCount(); + for (UINT32 familyIndex = 0; familyIndex < familyCount; ++familyIndex) { + SkTScopedComPtr fontFamily; + HRN(fontCollection->GetFontFamily(familyIndex, &fontFamily)); + + UINT32 fontCount = fontFamily->GetFontCount(); + for (UINT32 fontIndex = 0; fontIndex < fontCount; ++fontIndex) { + SkTScopedComPtr font; + HRN(fontFamily->GetFont(fontIndex, &font)); + + // Skip if the current font is simulated + if (font->GetSimulations() != DWRITE_FONT_SIMULATIONS_NONE) { + continue; + } + SkTScopedComPtr fontFace; + HRN(font->CreateFontFace(&fontFace)); + int faceIndex = fontFace->GetIndex(); + int ttcIndex = args.getCollectionIndex(); + + // Skip if the current face index does not match the ttcIndex + if (faceIndex != ttcIndex) { + continue; + } + + apply_fontargument_variation(fontFace, args); + + return DWriteFontTypeface::Make( + factory, fontFace.get(), font.get(), fontFamily.get(), + sk_make_sp( + factory, + autoUnregisterFontFileLoader.detatch(), + autoUnregisterFontCollectionLoader.detatch()), + args.getPalette()); + } + } + + return nullptr; +} + +#endif//defined(SK_BUILD_FOR_WIN) diff --git a/gfx/skia/skia/src/ports/SkTypeface_win_dw.h b/gfx/skia/skia/src/ports/SkTypeface_win_dw.h new file mode 100644 index 0000000000..7bbaeca614 --- /dev/null +++ b/gfx/skia/skia/src/ports/SkTypeface_win_dw.h @@ -0,0 +1,180 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTypeface_win_dw_DEFINED +#define SkTypeface_win_dw_DEFINED + +#include "include/core/SkFontArguments.h" +#include "include/core/SkTypeface.h" +#include "src/base/SkLeanWindows.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/core/SkTypefaceCache.h" +#include "src/utils/win/SkDWrite.h" +#include "src/utils/win/SkHRESULT.h" +#include "src/utils/win/SkTScopedComPtr.h" + +#include +#include +#include +#include + +#if !defined(__MINGW32__) && WINVER < 0x0A00 +#include "mozilla/gfx/dw-extra.h" +#endif + +class SkFontDescriptor; +struct SkScalerContextRec; + +/* dwrite_3.h incorrectly uses NTDDI_VERSION to hide immutible interfaces (it should only be used to + gate changes to public ABI). The implementation files can (and must) get away with including + SkDWriteNTDDI_VERSION.h which simply unsets NTDDI_VERSION, but this doesn't work well for this + header which can be included in SkTypeface.cpp. Instead, ensure that any declarations hidden + behind the NTDDI_VERSION are forward (backward?) declared here in case dwrite_3.h did not declare + them. */ +interface IDWriteFontFace4; + +static SkFontStyle get_style(IDWriteFont* font) { + int weight = font->GetWeight(); + int width = font->GetStretch(); + SkFontStyle::Slant slant = SkFontStyle::kUpright_Slant; + switch (font->GetStyle()) { + case DWRITE_FONT_STYLE_NORMAL: slant = SkFontStyle::kUpright_Slant; break; + case DWRITE_FONT_STYLE_OBLIQUE: slant = SkFontStyle::kOblique_Slant; break; + case DWRITE_FONT_STYLE_ITALIC: slant = SkFontStyle::kItalic_Slant; break; + default: SkASSERT(false); break; + } + return SkFontStyle(weight, width, slant); +} + +class DWriteFontTypeface : public SkTypeface { +public: + struct Loaders : public SkNVRefCnt { + Loaders(IDWriteFactory* factory, + IDWriteFontFileLoader* fontFileLoader, + IDWriteFontCollectionLoader* fontCollectionLoader) + : fFactory(SkRefComPtr(factory)) + , fDWriteFontFileLoader(SkRefComPtr(fontFileLoader)) + , fDWriteFontCollectionLoader(SkRefComPtr(fontCollectionLoader)) + {} + Loaders(const Loaders&) = delete; + Loaders& operator=(const Loaders&) = delete; + Loaders(Loaders&&) = delete; + Loaders& operator=(Loaders&&) = delete; + ~Loaders(); + + SkTScopedComPtr fFactory; + SkTScopedComPtr fDWriteFontFileLoader; + SkTScopedComPtr fDWriteFontCollectionLoader; + }; + + static constexpr SkTypeface::FactoryId FactoryId = SkSetFourByteTag('d','w','r','t'); + static sk_sp MakeFromStream(std::unique_ptr, const SkFontArguments&); + + ~DWriteFontTypeface() override; +private: + DWriteFontTypeface(const SkFontStyle& style, + IDWriteFactory* factory, + IDWriteFontFace* fontFace, + IDWriteFont* font, + IDWriteFontFamily* fontFamily, + sk_sp loaders, + const SkFontArguments::Palette&); + HRESULT initializePalette(); + +public: + SkTScopedComPtr fFactory; + SkTScopedComPtr fFactory2; + SkTScopedComPtr fDWriteFontFamily; + SkTScopedComPtr fDWriteFont; + SkTScopedComPtr fDWriteFontFace; + SkTScopedComPtr fDWriteFontFace1; + SkTScopedComPtr fDWriteFontFace2; + SkTScopedComPtr fDWriteFontFace4; + bool fIsColorFont; + + std::unique_ptr fRequestedPaletteEntryOverrides; + SkFontArguments::Palette fRequestedPalette; + + size_t fPaletteEntryCount; + std::unique_ptr fPalette; + + static sk_sp Make( + IDWriteFactory* factory, + IDWriteFontFace* fontFace, + IDWriteFont* font, + IDWriteFontFamily* fontFamily, + sk_sp loaders, + const SkFontArguments::Palette& palette) + { + return sk_sp(new DWriteFontTypeface( + get_style(font), factory, fontFace, font, fontFamily, std::move(loaders), palette)); + } + + static DWriteFontTypeface* Create(IDWriteFactory* factory, + IDWriteFontFace* fontFace, + SkFontStyle aStyle, + DWRITE_RENDERING_MODE aRenderingMode, + float aGamma, + float aContrast, + float aClearTypeLevel) { + DWriteFontTypeface* typeface = + new DWriteFontTypeface(aStyle, factory, fontFace, + nullptr, nullptr, + nullptr, SkFontArguments::Palette{0, nullptr, 0}); + typeface->fRenderingMode = aRenderingMode; + typeface->fGamma = aGamma; + typeface->fContrast = aContrast; + typeface->fClearTypeLevel = aClearTypeLevel; + return typeface; + } + + bool ForceGDI() const { return fRenderingMode == DWRITE_RENDERING_MODE_GDI_CLASSIC; } + DWRITE_RENDERING_MODE GetRenderingMode() const { return fRenderingMode; } + float GetClearTypeLevel() const { return fClearTypeLevel; } + +protected: + void weak_dispose() const override { + fLoaders.reset(); + + //SkTypefaceCache::Remove(this); + INHERITED::weak_dispose(); + } + + sk_sp onMakeClone(const SkFontArguments&) const override; + std::unique_ptr onOpenStream(int* ttcIndex) const override; + std::unique_ptr onCreateScalerContext(const SkScalerContextEffects&, + const SkDescriptor*) const override; + void onFilterRec(SkScalerContextRec*) const override; + void getGlyphToUnicodeMap(SkUnichar* glyphToUnicode) const override; + std::unique_ptr onGetAdvancedMetrics() const override; + void onGetFontDescriptor(SkFontDescriptor*, bool*) const override; + void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override; + int onCountGlyphs() const override; + void getPostScriptGlyphNames(SkString*) const override; + int onGetUPEM() const override; + void onGetFamilyName(SkString* familyName) const override; + bool onGetPostScriptName(SkString*) const override; + SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override; + bool onGlyphMaskNeedsCurrentColor() const override; + int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], + int coordinateCount) const override; + int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[], + int parameterCount) const override; + int onGetTableTags(SkFontTableTag tags[]) const override; + size_t onGetTableData(SkFontTableTag, size_t offset, size_t length, void* data) const override; + sk_sp onCopyTableData(SkFontTableTag) const override; + +private: + mutable sk_sp fLoaders; + using INHERITED = SkTypeface; + DWRITE_RENDERING_MODE fRenderingMode; + float fGamma; + float fContrast; + float fClearTypeLevel; +}; + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkIBMFamilyClass.h b/gfx/skia/skia/src/sfnt/SkIBMFamilyClass.h new file mode 100644 index 0000000000..8ad1dbeaf4 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkIBMFamilyClass.h @@ -0,0 +1,142 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkIBMFamilyClass_DEFINED +#define SkIBMFamilyClass_DEFINED + +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkIBMFamilyClass { + enum class Class : SK_OT_BYTE { + NoClassification = 0, + OldstyleSerifs = 1, + TransitionalSerifs = 2, + ModernSerifs = 3, + ClarendonSerifs = 4, + SlabSerifs = 5, + //6 reserved for future use + FreeformSerifs = 7, + SansSerif = 8, + Ornamentals = 9, + Scripts = 10, + //11 reserved for future use + Symbolic = 12, + //13-15 reserved for future use + } familyClass; + union SubClass { + enum class OldstyleSerifs : SK_OT_BYTE { + NoClassification = 0, + IBMRoundedLegibility = 1, + Garalde = 2, + Venetian = 3, + ModifiedVenetian = 4, + DutchModern = 5, + DutchTraditional = 6, + Contemporary = 7, + Calligraphic = 8, + //9-14 reserved for future use + Miscellaneous = 15, + } oldstyleSerifs; + enum class TransitionalSerifs : SK_OT_BYTE { + NoClassification = 0, + DirectLine = 1, + Script = 2, + //3-14 reserved for future use + Miscellaneous = 15, + } transitionalSerifs; + enum class ModernSerifs : SK_OT_BYTE { + NoClassification = 0, + Italian = 1, + Script = 2, + //3-14 reserved for future use + Miscellaneous = 15, + } modernSerifs; + enum class ClarendonSerifs : SK_OT_BYTE { + NoClassification = 0, + Clarendon = 1, + Modern = 2, + Traditional = 3, + Newspaper = 4, + StubSerif = 5, + Monotone = 6, + Typewriter = 7, + //8-14 reserved for future use + Miscellaneous = 15, + } clarendonSerifs; + enum class SlabSerifs : SK_OT_BYTE { + NoClassification = 0, + Monotone = 1, + Humanist = 2, + Geometric = 3, + Swiss = 4, + Typewriter = 5, + //6-14 reserved for future use + Miscellaneous = 15, + } slabSerifs; + enum class FreeformSerifs : SK_OT_BYTE { + NoClassification = 0, + Modern = 1, + //2-14 reserved for future use + Miscellaneous = 15, + } freeformSerifs; + enum class SansSerif : SK_OT_BYTE { + NoClassification = 0, + IBMNeoGrotesqueGothic = 1, + Humanist = 2, + LowXRoundGeometric = 3, + HighXRoundGeometric = 4, + NeoGrotesqueGothic = 5, + ModifiedNeoGrotesqueGothic = 6, + //7-8 reserved for future use + TypewriterGothic = 9, + Matrix = 10, + //11-14 reserved for future use + Miscellaneous = 15, + } sansSerif; + enum class Ornamentals : SK_OT_BYTE { + NoClassification = 0, + Engraver = 1, + BlackLetter = 2, + Decorative = 3, + ThreeDimensional = 4, + //5-14 reserved for future use + Miscellaneous = 15, + } ornamentals; + enum class Scripts : SK_OT_BYTE { + NoClassification = 0, + Uncial = 1, + Brush_Joined = 2, + Formal_Joined = 3, + Monotone_Joined = 4, + Calligraphic = 5, + Brush_Unjoined = 6, + Formal_Unjoined = 7, + Monotone_Unjoined = 8, + //9-14 reserved for future use + Miscellaneous = 15, + } scripts; + enum class Symbolic : SK_OT_BYTE { + NoClassification = 0, + //1-2 reserved for future use + MixedSerif = 3, + //4-5 reserved for future use + OldstyleSerif = 6, + NeoGrotesqueSansSerif = 7, + //8-14 reserved for future use + Miscellaneous = 15, + } symbolic; + } familySubClass; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkIBMFamilyClass) == 2, "sizeof_SkIBMFamilyClass_not_2"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTableTypes.h b/gfx/skia/skia/src/sfnt/SkOTTableTypes.h new file mode 100644 index 0000000000..739bd0ec16 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTableTypes.h @@ -0,0 +1,62 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTableTypes_DEFINED +#define SkOTTableTypes_DEFINED + +#include "include/core/SkTypes.h" +#include "src/base/SkEndian.h" + +//All SK_OT_ prefixed types should be considered as big endian. +typedef uint8_t SK_OT_BYTE; +#if CHAR_BIT == 8 +typedef signed char SK_OT_CHAR; //easier to debug +#else +typedef int8_t SK_OT_CHAR; +#endif +typedef uint16_t SK_OT_SHORT; +typedef uint16_t SK_OT_USHORT; +typedef uint32_t SK_OT_ULONG; +typedef uint32_t SK_OT_LONG; +//16.16 Signed fixed point representation. +typedef int32_t SK_OT_Fixed; +//2.14 Signed fixed point representation. +typedef uint16_t SK_OT_F2DOT14; +//F units are the units of measurement in em space. +typedef uint16_t SK_OT_FWORD; +typedef uint16_t SK_OT_UFWORD; +//Number of seconds since 12:00 midnight, January 1, 1904. +typedef uint64_t SK_OT_LONGDATETIME; + +#define SK_OT_BYTE_BITFIELD SK_UINT8_BITFIELD + +template class SkOTTableTAG { +public: + /** + * SkOTTableTAG::value is the big endian value of an OpenType table tag. + * It may be directly compared with raw big endian table data. + */ + static const SK_OT_ULONG value = SkTEndian_SwapBE32( + SkSetFourByteTag(T::TAG0, T::TAG1, T::TAG2, T::TAG3) + ); +}; + +/** SkOTSetUSHORTBit::value is an SK_OT_USHORT with the Nth BE bit set. */ +template struct SkOTSetUSHORTBit { + static_assert(N < 16, "NTooBig"); + static const uint16_t bit = 1u << N; + static const SK_OT_USHORT value = SkTEndian_SwapBE16(bit); +}; + +/** SkOTSetULONGBit::value is an SK_OT_ULONG with the Nth BE bit set. */ +template struct SkOTSetULONGBit { + static_assert(N < 32, "NTooBig"); + static const uint32_t bit = 1u << N; + static const SK_OT_ULONG value = SkTEndian_SwapBE32(bit); +}; + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_EBDT.h b/gfx/skia/skia/src/sfnt/SkOTTable_EBDT.h new file mode 100644 index 0000000000..da04d31c30 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_EBDT.h @@ -0,0 +1,108 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_EBDT_DEFINED +#define SkOTTable_EBDT_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_head.h" +#include "src/sfnt/SkOTTable_loca.h" + +#pragma pack(push, 1) + +struct SkOTTableEmbeddedBitmapData { + static const SK_OT_CHAR TAG0 = 'E'; + static const SK_OT_CHAR TAG1 = 'B'; + static const SK_OT_CHAR TAG2 = 'D'; + static const SK_OT_CHAR TAG3 = 'T'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_Fixed version; + static const SK_OT_Fixed version_initial = SkTEndian_SwapBE32(0x00020000); + + struct BigGlyphMetrics { + SK_OT_BYTE height; + SK_OT_BYTE width; + SK_OT_CHAR horiBearingX; + SK_OT_CHAR horiBearingY; + SK_OT_BYTE horiAdvance; + SK_OT_CHAR vertBearingX; + SK_OT_CHAR vertBearingY; + SK_OT_BYTE vertAdvance; + }; + + struct SmallGlyphMetrics { + SK_OT_BYTE height; + SK_OT_BYTE width; + SK_OT_CHAR bearingX; + SK_OT_CHAR bearingY; + SK_OT_BYTE advance; + }; + + // Small metrics, byte-aligned data. + struct Format1 { + SmallGlyphMetrics smallGlyphMetrics; + //SK_OT_BYTE[] byteAlignedBitmap; + }; + + // Small metrics, bit-aligned data. + struct Format2 { + SmallGlyphMetrics smallGlyphMetrics; + //SK_OT_BYTE[] bitAlignedBitmap; + }; + + // Format 3 is not used. + + // EBLC metrics (IndexSubTable::header::indexFormat 2 or 5), compressed data. + // Only used on Mac. + struct Format4 { + SK_OT_ULONG whiteTreeOffset; + SK_OT_ULONG blackTreeOffset; + SK_OT_ULONG glyphDataOffset; + }; + + // EBLC metrics (IndexSubTable::header::indexFormat 2 or 5), bit-aligned data. + struct Format5 { + //SK_OT_BYTE[] bitAlignedBitmap; + }; + + // Big metrics, byte-aligned data. + struct Format6 { + BigGlyphMetrics bigGlyphMetrics; + //SK_OT_BYTE[] byteAlignedBitmap; + }; + + // Big metrics, bit-aligned data. + struct Format7 { + BigGlyphMetrics bigGlyphMetrics; + //SK_OT_BYTE[] bitAlignedBitmap; + }; + + struct EBDTComponent { + SK_OT_USHORT glyphCode; // Component glyph code + SK_OT_CHAR xOffset; // Position of component left + SK_OT_CHAR yOffset; // Position of component top + }; + + struct Format8 { + SmallGlyphMetrics smallMetrics; // Metrics information for the glyph + SK_OT_BYTE pad; // Pad to short boundary + SK_OT_USHORT numComponents; // Number of components + //EBDTComponent componentArray[numComponents]; // Glyph code, offset array + }; + + struct Format9 { + BigGlyphMetrics bigMetrics; // Metrics information for the glyph + SK_OT_USHORT numComponents; // Number of components + //EBDTComponent componentArray[numComponents]; // Glyph code, offset array + }; +}; + +#pragma pack(pop) + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_EBLC.h b/gfx/skia/skia/src/sfnt/SkOTTable_EBLC.h new file mode 100644 index 0000000000..e7c65832c5 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_EBLC.h @@ -0,0 +1,150 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_EBLC_DEFINED +#define SkOTTable_EBLC_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_EBDT.h" + +#pragma pack(push, 1) + +struct SkOTTableEmbeddedBitmapLocation { + static const SK_OT_CHAR TAG0 = 'E'; + static const SK_OT_CHAR TAG1 = 'B'; + static const SK_OT_CHAR TAG2 = 'L'; + static const SK_OT_CHAR TAG3 = 'C'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_Fixed version; + static const SK_OT_Fixed version_initial = SkTEndian_SwapBE32(0x00020000); + + SK_OT_ULONG numSizes; + + struct SbitLineMetrics { + SK_OT_CHAR ascender; + SK_OT_CHAR descender; + SK_OT_BYTE widthMax; + SK_OT_CHAR caretSlopeNumerator; + SK_OT_CHAR caretSlopeDenominator; + SK_OT_CHAR caretOffset; + SK_OT_CHAR minOriginSB; + SK_OT_CHAR minAdvanceSB; + SK_OT_CHAR maxBeforeBL; + SK_OT_CHAR minAfterBL; + SK_OT_CHAR pad1; + SK_OT_CHAR pad2; + }; + + struct BitmapSizeTable { + SK_OT_ULONG indexSubTableArrayOffset; //offset to indexSubtableArray from beginning of EBLC. + SK_OT_ULONG indexTablesSize; //number of bytes in corresponding index subtables and array + SK_OT_ULONG numberOfIndexSubTables; //an index subtable for each range or format change + SK_OT_ULONG colorRef; //not used; set to 0. + SbitLineMetrics hori; //line metrics for text rendered horizontally + SbitLineMetrics vert; //line metrics for text rendered vertically + SK_OT_USHORT startGlyphIndex; //lowest glyph index for this size + SK_OT_USHORT endGlyphIndex; //highest glyph index for this size + SK_OT_BYTE ppemX; //horizontal pixels per Em + SK_OT_BYTE ppemY; //vertical pixels per Em + struct BitDepth { + enum Value : SK_OT_BYTE { + BW = 1, + Gray4 = 2, + Gray16 = 4, + Gray256 = 8, + }; + SK_OT_BYTE value; + } bitDepth; //the Microsoft rasterizer v.1.7 or greater supports + union Flags { + struct Field { + //0-7 + SK_OT_BYTE_BITFIELD( + Horizontal, // Horizontal small glyph metrics + Vertical, // Vertical small glyph metrics + Reserved02, + Reserved03, + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_CHAR Horizontal = 1u << 0; + static const SK_OT_CHAR Vertical = 1u << 1; + SK_OT_CHAR value; + } raw; + } flags; + }; //bitmapSizeTable[numSizes]; + + struct IndexSubTableArray { + SK_OT_USHORT firstGlyphIndex; //first glyph code of this range + SK_OT_USHORT lastGlyphIndex; //last glyph code of this range (inclusive) + SK_OT_ULONG additionalOffsetToIndexSubtable; //add to BitmapSizeTable::indexSubTableArrayOffset to get offset from beginning of 'EBLC' + }; //indexSubTableArray[BitmapSizeTable::numberOfIndexSubTables]; + + struct IndexSubHeader { + SK_OT_USHORT indexFormat; //format of this indexSubTable + SK_OT_USHORT imageFormat; //format of 'EBDT' image data + SK_OT_ULONG imageDataOffset; //offset to image data in 'EBDT' table + }; + + // Variable metrics glyphs with 4 byte offsets + struct IndexSubTable1 { + IndexSubHeader header; + //SK_OT_ULONG offsetArray[lastGlyphIndex - firstGlyphIndex + 1 + 1]; //last element points to one past end of last glyph + //glyphData = offsetArray[glyphIndex - firstGlyphIndex] + imageDataOffset + }; + + // All Glyphs have identical metrics + struct IndexSubTable2 { + IndexSubHeader header; + SK_OT_ULONG imageSize; // all glyphs are of the same size + SkOTTableEmbeddedBitmapData::BigGlyphMetrics bigMetrics; // all glyphs have the same metrics; glyph data may be compressed, byte-aligned, or bit-aligned + }; + + // Variable metrics glyphs with 2 byte offsets + struct IndexSubTable3 { + IndexSubHeader header; + //SK_OT_USHORT offsetArray[lastGlyphIndex - firstGlyphIndex + 1 + 1]; //last element points to one past end of last glyph, may have extra element to force even number of elements + //glyphData = offsetArray[glyphIndex - firstGlyphIndex] + imageDataOffset + }; + + // Variable metrics glyphs with sparse glyph codes + struct IndexSubTable4 { + IndexSubHeader header; + SK_OT_ULONG numGlyphs; + struct CodeOffsetPair { + SK_OT_USHORT glyphCode; + SK_OT_USHORT offset; //location in EBDT + }; //glyphArray[numGlyphs+1] + }; + + // Constant metrics glyphs with sparse glyph codes + struct IndexSubTable5 { + IndexSubHeader header; + SK_OT_ULONG imageSize; //all glyphs have the same data size + SkOTTableEmbeddedBitmapData::BigGlyphMetrics bigMetrics; //all glyphs have the same metrics + SK_OT_ULONG numGlyphs; + //SK_OT_USHORT glyphCodeArray[numGlyphs] //must have even number of entries (set pad to 0) + }; + + union IndexSubTable { + IndexSubHeader header; + IndexSubTable1 format1; + IndexSubTable2 format2; + IndexSubTable3 format3; + IndexSubTable4 format4; + IndexSubTable5 format5; + }; + +}; + +#pragma pack(pop) + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_EBSC.h b/gfx/skia/skia/src/sfnt/SkOTTable_EBSC.h new file mode 100644 index 0000000000..549f114406 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_EBSC.h @@ -0,0 +1,41 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_EBSC_DEFINED +#define SkOTTable_EBSC_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_EBLC.h" + +#pragma pack(push, 1) + +struct SkOTTableEmbeddedBitmapScaling { + static const SK_OT_CHAR TAG0 = 'E'; + static const SK_OT_CHAR TAG1 = 'S'; + static const SK_OT_CHAR TAG2 = 'B'; + static const SK_OT_CHAR TAG3 = 'C'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_Fixed version; + static const SK_OT_Fixed version_initial = SkTEndian_SwapBE32(0x00020000); + + SK_OT_ULONG numSizes; + + struct BitmapScaleTable { + SkOTTableEmbeddedBitmapLocation::SbitLineMetrics hori; + SkOTTableEmbeddedBitmapLocation::SbitLineMetrics vert; + SK_OT_BYTE ppemX; //target horizontal pixels per EM + SK_OT_BYTE ppemY; //target vertical pixels per EM + SK_OT_BYTE substitutePpemX; //use bitmaps of this size + SK_OT_BYTE substitutePpemY; //use bitmaps of this size + }; //bitmapScaleTable[numSizes]; +}; + +#pragma pack(pop) + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_OS_2.h b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2.h new file mode 100644 index 0000000000..cb5312f33e --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2.h @@ -0,0 +1,52 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_OS_2_DEFINED +#define SkOTTable_OS_2_DEFINED + +#include "src/sfnt/SkOTTable_OS_2_V0.h" +#include "src/sfnt/SkOTTable_OS_2_V1.h" +#include "src/sfnt/SkOTTable_OS_2_V2.h" +#include "src/sfnt/SkOTTable_OS_2_V3.h" +#include "src/sfnt/SkOTTable_OS_2_V4.h" +#include "src/sfnt/SkOTTable_OS_2_VA.h" + +#pragma pack(push, 1) + +struct SkOTTableOS2 { + inline static constexpr SK_OT_CHAR TAG0 = 'O'; + inline static constexpr SK_OT_CHAR TAG1 = 'S'; + inline static constexpr SK_OT_CHAR TAG2 = '/'; + inline static constexpr SK_OT_CHAR TAG3 = '2'; + inline static constexpr SK_OT_ULONG TAG = SkOTTableTAG::value; + + union Version { + SK_OT_USHORT version; + + //original V0 TT + struct VA : SkOTTableOS2_VA { } vA; + struct V0 : SkOTTableOS2_V0 { } v0; + struct V1 : SkOTTableOS2_V1 { } v1; + struct V2 : SkOTTableOS2_V2 { } v2; + //makes fsType 0-3 exclusive + struct V3 : SkOTTableOS2_V3 { } v3; + //defines fsSelection bits 7-9 + struct V4 : SkOTTableOS2_V4 { } v4; + } version; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableOS2::Version::VA) == 68, "sizeof_SkOTTableOS2__VA_not_68"); +static_assert(sizeof(SkOTTableOS2::Version::V0) == 78, "sizeof_SkOTTableOS2__V0_not_78"); +static_assert(sizeof(SkOTTableOS2::Version::V1) == 86, "sizeof_SkOTTableOS2__V1_not_86"); +static_assert(sizeof(SkOTTableOS2::Version::V2) == 96, "sizeof_SkOTTableOS2__V2_not_96"); +static_assert(sizeof(SkOTTableOS2::Version::V3) == 96, "sizeof_SkOTTableOS2__V3_not_96"); +static_assert(sizeof(SkOTTableOS2::Version::V4) == 96, "sizeof_SkOTTableOS2__V4_not_96"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V0.h b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V0.h new file mode 100644 index 0000000000..fc789f3e2f --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V0.h @@ -0,0 +1,146 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_OS_2_V0_DEFINED +#define SkOTTable_OS_2_V0_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkIBMFamilyClass.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkPanose.h" + +#pragma pack(push, 1) + +struct SkOTTableOS2_V0 { + SK_OT_USHORT version; + //SkOTTableOS2_VA::VERSION and SkOTTableOS2_V0::VERSION are both 0. + //The only way to differentiate these two versions is by the size of the table. + static const SK_OT_USHORT VERSION = SkTEndian_SwapBE16(0); + + SK_OT_SHORT xAvgCharWidth; + struct WeightClass { + enum Value : SK_OT_USHORT { + Thin = SkTEndian_SwapBE16(100), + ExtraLight = SkTEndian_SwapBE16(200), + Light = SkTEndian_SwapBE16(300), + Normal = SkTEndian_SwapBE16(400), + Medium = SkTEndian_SwapBE16(500), + SemiBold = SkTEndian_SwapBE16(600), + Bold = SkTEndian_SwapBE16(700), + ExtraBold = SkTEndian_SwapBE16(800), + Black = SkTEndian_SwapBE16(900), + }; + SK_OT_USHORT value; + } usWeightClass; + struct WidthClass { + enum Value : SK_OT_USHORT { + UltraCondensed = SkTEndian_SwapBE16(1), + ExtraCondensed = SkTEndian_SwapBE16(2), + Condensed = SkTEndian_SwapBE16(3), + SemiCondensed = SkTEndian_SwapBE16(4), + Medium = SkTEndian_SwapBE16(5), + SemiExpanded = SkTEndian_SwapBE16(6), + Expanded = SkTEndian_SwapBE16(7), + ExtraExpanded = SkTEndian_SwapBE16(8), + UltraExpanded = SkTEndian_SwapBE16(9), + } value; + } usWidthClass; + union Type { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Reserved00, + Restricted, + PreviewPrint, + Editable, + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT Installable = 0; + static const SK_OT_USHORT RestrictedMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT PreviewPrintMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT EditableMask = SkOTSetUSHORTBit<3>::value; + SK_OT_USHORT value; + } raw; + } fsType; + SK_OT_SHORT ySubscriptXSize; + SK_OT_SHORT ySubscriptYSize; + SK_OT_SHORT ySubscriptXOffset; + SK_OT_SHORT ySubscriptYOffset; + SK_OT_SHORT ySuperscriptXSize; + SK_OT_SHORT ySuperscriptYSize; + SK_OT_SHORT ySuperscriptXOffset; + SK_OT_SHORT ySuperscriptYOffset; + SK_OT_SHORT yStrikeoutSize; + SK_OT_SHORT yStrikeoutPosition; + SkIBMFamilyClass sFamilyClass; + SkPanose panose; + SK_OT_ULONG ulCharRange[4]; + SK_OT_CHAR achVendID[4]; + union Selection { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Italic, + Underscore, + Negative, + Outlined, + Strikeout, + Bold, + Regular, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT ItalicMask = SkOTSetUSHORTBit<0>::value; + static const SK_OT_USHORT UnderscoreMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT NegativeMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT OutlinedMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT StrikeoutMask = SkOTSetUSHORTBit<4>::value; + static const SK_OT_USHORT BoldMask = SkOTSetUSHORTBit<5>::value; + static const SK_OT_USHORT RegularMask = SkOTSetUSHORTBit<6>::value; + SK_OT_USHORT value; + } raw; + } fsSelection; + SK_OT_USHORT usFirstCharIndex; + SK_OT_USHORT usLastCharIndex; + //version0 + SK_OT_SHORT sTypoAscender; + SK_OT_SHORT sTypoDescender; + SK_OT_SHORT sTypoLineGap; + SK_OT_USHORT usWinAscent; + SK_OT_USHORT usWinDescent; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableOS2_V0) == 78, "sizeof_SkOTTableOS2_V0_not_78"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V1.h b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V1.h new file mode 100644 index 0000000000..cf183c9cee --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V1.h @@ -0,0 +1,515 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_OS_2_V1_DEFINED +#define SkOTTable_OS_2_V1_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkIBMFamilyClass.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkPanose.h" + +#pragma pack(push, 1) + +struct SkOTTableOS2_V1 { + SK_OT_USHORT version; + static const SK_OT_USHORT VERSION = SkTEndian_SwapBE16(1); + + SK_OT_SHORT xAvgCharWidth; + struct WeightClass { + enum Value : SK_OT_USHORT { + Thin = SkTEndian_SwapBE16(100), + ExtraLight = SkTEndian_SwapBE16(200), + Light = SkTEndian_SwapBE16(300), + Normal = SkTEndian_SwapBE16(400), + Medium = SkTEndian_SwapBE16(500), + SemiBold = SkTEndian_SwapBE16(600), + Bold = SkTEndian_SwapBE16(700), + ExtraBold = SkTEndian_SwapBE16(800), + Black = SkTEndian_SwapBE16(900), + }; + SK_OT_USHORT value; + } usWeightClass; + struct WidthClass { + enum Value : SK_OT_USHORT { + UltraCondensed = SkTEndian_SwapBE16(1), + ExtraCondensed = SkTEndian_SwapBE16(2), + Condensed = SkTEndian_SwapBE16(3), + SemiCondensed = SkTEndian_SwapBE16(4), + Medium = SkTEndian_SwapBE16(5), + SemiExpanded = SkTEndian_SwapBE16(6), + Expanded = SkTEndian_SwapBE16(7), + ExtraExpanded = SkTEndian_SwapBE16(8), + UltraExpanded = SkTEndian_SwapBE16(9), + } value; + } usWidthClass; + union Type { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Reserved00, + Restricted, + PreviewPrint, + Editable, + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT Installable = 0; + static const SK_OT_USHORT RestrictedMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT PreviewPrintMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT EditableMask = SkOTSetUSHORTBit<3>::value; + SK_OT_USHORT value; + } raw; + } fsType; + SK_OT_SHORT ySubscriptXSize; + SK_OT_SHORT ySubscriptYSize; + SK_OT_SHORT ySubscriptXOffset; + SK_OT_SHORT ySubscriptYOffset; + SK_OT_SHORT ySuperscriptXSize; + SK_OT_SHORT ySuperscriptYSize; + SK_OT_SHORT ySuperscriptXOffset; + SK_OT_SHORT ySuperscriptYOffset; + SK_OT_SHORT yStrikeoutSize; + SK_OT_SHORT yStrikeoutPosition; + SkIBMFamilyClass sFamilyClass; + SkPanose panose; + union UnicodeRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Thai, + Lao, + BasicGeorgian, + GeorgianExtended, + HangulJamo, + LatinExtendedAdditional, + GreekExtended, + GeneralPunctuation) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Bengali, + Gurmukhi, + Gujarati, + Oriya, + Tamil, + Telugu, + Kannada, + Malayalam) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + GreekSymbolsAndCoptic, + Cyrillic, + Armenian, + BasicHebrew, + HebrewExtendedAB, + BasicArabic, + ArabicExtended, + Devanagari) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + BasicLatin, + Latin1Supplement, + LatinExtendedA, + LatinExtendedB, + IPAExtensions, + SpacingModifierLetters, + CombiningDiacriticalMarks, + BasicGreek) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + Hangul, + Reserved057, + Reserved058, + CJKUnifiedIdeographs, + PrivateUseArea, + CJKCompatibilityIdeographs, + AlphabeticPresentationForms, + ArabicPresentationFormsA) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + CJKSymbolsAndPunctuation, + Hiragana, + Katakana, + Bopomofo, + HangulCompatibilityJamo, + CJKMiscellaneous, + EnclosedCJKLettersAndMonths, + CJKCompatibility) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + ControlPictures, + OpticalCharacterRecognition, + EnclosedAlphanumerics, + BoxDrawing, + BlockElements, + GeometricShapes, + MiscellaneousSymbols, + Dingbats) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + SuperscriptsAndSubscripts, + CurrencySymbols, + CombiningDiacriticalMarksForSymbols, + LetterlikeSymbols, + NumberForms, + Arrows, + MathematicalOperators, + MiscellaneousTechnical) + + //l2 24-31 + SK_OT_BYTE_BITFIELD( + Reserved088, + Reserved089, + Reserved090, + Reserved091, + Reserved092, + Reserved093, + Reserved094, + Reserved095) + //l2 16-23 + SK_OT_BYTE_BITFIELD( + Reserved080, + Reserved081, + Reserved082, + Reserved083, + Reserved084, + Reserved085, + Reserved086, + Reserved087) + //l2 8-15 + SK_OT_BYTE_BITFIELD( + Reserved072, + Reserved073, + Reserved074, + Reserved075, + Reserved076, + Reserved077, + Reserved078, + Reserved079) + //l2 0-7 + SK_OT_BYTE_BITFIELD( + CombiningHalfMarks, + CJKCompatibilityForms, + SmallFormVariants, + ArabicPresentationFormsB, + HalfwidthAndFullwidthForms, + Specials, + Reserved70, + Reserved71) + + //l3 24-31 + SK_OT_BYTE_BITFIELD( + Reserved120, + Reserved121, + Reserved122, + Reserved123, + Reserved124, + Reserved125, + Reserved126, + Reserved127) + //l3 16-23 + SK_OT_BYTE_BITFIELD( + Reserved112, + Reserved113, + Reserved114, + Reserved115, + Reserved116, + Reserved117, + Reserved118, + Reserved119) + //l3 8-15 + SK_OT_BYTE_BITFIELD( + Reserved104, + Reserved105, + Reserved106, + Reserved107, + Reserved108, + Reserved109, + Reserved110, + Reserved111) + //l3 0-7 + SK_OT_BYTE_BITFIELD( + Reserved096, + Reserved097, + Reserved098, + Reserved099, + Reserved100, + Reserved101, + Reserved102, + Reserved103) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG BasicLatinMask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin1SupplementMask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG LatinExtendedAMask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG LatinExtendedBMask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG IPAExtensionsMask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG SpacingModifierLettersMask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksMask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG BasicGreekMask = SkOTSetULONGBit<7>::value; + static const SK_OT_ULONG GreekSymbolsAndCCopticMask = SkOTSetULONGBit<8>::value; + static const SK_OT_ULONG CyrillicMask = SkOTSetULONGBit<9>::value; + static const SK_OT_ULONG ArmenianMask = SkOTSetULONGBit<10>::value; + static const SK_OT_ULONG BasicHebrewMask = SkOTSetULONGBit<11>::value; + static const SK_OT_ULONG HebrewExtendedABMask = SkOTSetULONGBit<12>::value; + static const SK_OT_ULONG BasicArabicMask = SkOTSetULONGBit<13>::value; + static const SK_OT_ULONG ArabicExtendedMask = SkOTSetULONGBit<14>::value; + static const SK_OT_ULONG DevanagariMask = SkOTSetULONGBit<15>::value; + static const SK_OT_ULONG BengaliMask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG GurmukhiMask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG GujaratiMask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG OriyaMask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG TamilMask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG TeluguMask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG KannadaMask = SkOTSetULONGBit<22>::value; + static const SK_OT_ULONG MalayalamMask = SkOTSetULONGBit<23>::value; + static const SK_OT_ULONG ThaiMask = SkOTSetULONGBit<24>::value; + static const SK_OT_ULONG LaoMask = SkOTSetULONGBit<25>::value; + static const SK_OT_ULONG BasicGeorgianMask = SkOTSetULONGBit<26>::value; + static const SK_OT_ULONG GeorgianExtendedMask = SkOTSetULONGBit<27>::value; + static const SK_OT_ULONG HangulJamoMask = SkOTSetULONGBit<28>::value; + static const SK_OT_ULONG LatinExtendedAdditionalMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG GreekExtendedMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG GeneralPunctuationMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG SuperscriptsAndSubscriptsMask = SkOTSetULONGBit<32 - 32>::value; + static const SK_OT_ULONG CurrencySymbolsMask = SkOTSetULONGBit<33 - 32>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksForSymbolsMask = SkOTSetULONGBit<34 - 32>::value; + static const SK_OT_ULONG LetterlikeSymbolsMask = SkOTSetULONGBit<35 - 32>::value; + static const SK_OT_ULONG NumberFormsMask = SkOTSetULONGBit<36 - 32>::value; + static const SK_OT_ULONG ArrowsMask = SkOTSetULONGBit<37 - 32>::value; + static const SK_OT_ULONG MathematicalOperatorsMask = SkOTSetULONGBit<38 - 32>::value; + static const SK_OT_ULONG MiscellaneousTechnicalMask = SkOTSetULONGBit<39 - 32>::value; + static const SK_OT_ULONG ControlPicturesMask = SkOTSetULONGBit<40 - 32>::value; + static const SK_OT_ULONG OpticalCharacterRecognitionMask = SkOTSetULONGBit<41 - 32>::value; + static const SK_OT_ULONG EnclosedAlphanumericsMask = SkOTSetULONGBit<42 - 32>::value; + static const SK_OT_ULONG BoxDrawingMask = SkOTSetULONGBit<43 - 32>::value; + static const SK_OT_ULONG BlockElementsMask = SkOTSetULONGBit<44 - 32>::value; + static const SK_OT_ULONG GeometricShapesMask = SkOTSetULONGBit<45 - 32>::value; + static const SK_OT_ULONG MiscellaneousSymbolsMask = SkOTSetULONGBit<46 - 32>::value; + static const SK_OT_ULONG DingbatsMask = SkOTSetULONGBit<47 - 32>::value; + static const SK_OT_ULONG CJKSymbolsAndPunctuationMask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG HiraganaMask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG KatakanaMask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG BopomofoMask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG HangulCompatibilityJamoMask = SkOTSetULONGBit<52 - 32>::value; + static const SK_OT_ULONG CJKMiscellaneousMask = SkOTSetULONGBit<53 - 32>::value; + static const SK_OT_ULONG EnclosedCJKLettersAndMonthsMask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityMask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG HangulMask = SkOTSetULONGBit<56 - 32>::value; + //Reserved + //Reserved + static const SK_OT_ULONG CJKUnifiedIdeographsMask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG PrivateUseAreaMask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityIdeographsMask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG AlphabeticPresentationFormsMask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG ArabicPresentationFormsAMask = SkOTSetULONGBit<63 - 32>::value; + }; + struct l2 { + static const SK_OT_ULONG CombiningHalfMarksMask = SkOTSetULONGBit<64 - 64>::value; + static const SK_OT_ULONG CJKCompatibilityFormsMask = SkOTSetULONGBit<65 - 64>::value; + static const SK_OT_ULONG SmallFormVariantsMask = SkOTSetULONGBit<66 - 64>::value; + static const SK_OT_ULONG ArabicPresentationFormsBMask = SkOTSetULONGBit<67 - 64>::value; + static const SK_OT_ULONG HalfwidthAndFullwidthFormsMask = SkOTSetULONGBit<68 - 64>::value; + static const SK_OT_ULONG SpecialsMask = SkOTSetULONGBit<69 - 64>::value; + }; + SK_OT_ULONG value[4]; + } raw; + } ulUnicodeRange; + SK_OT_CHAR achVendID[4]; + union Selection { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Italic, + Underscore, + Negative, + Outlined, + Strikeout, + Bold, + Regular, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT ItalicMask = SkOTSetUSHORTBit<0>::value; + static const SK_OT_USHORT UnderscoreMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT NegativeMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT OutlinedMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT StrikeoutMask = SkOTSetUSHORTBit<4>::value; + static const SK_OT_USHORT BoldMask = SkOTSetUSHORTBit<5>::value; + static const SK_OT_USHORT RegularMask = SkOTSetUSHORTBit<6>::value; + SK_OT_USHORT value; + } raw; + } fsSelection; + SK_OT_USHORT usFirstCharIndex; + SK_OT_USHORT usLastCharIndex; + //version0 + SK_OT_SHORT sTypoAscender; + SK_OT_SHORT sTypoDescender; + SK_OT_SHORT sTypoLineGap; + SK_OT_USHORT usWinAscent; + SK_OT_USHORT usWinDescent; + //version1 + union CodePageRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Reserved24, + Reserved25, + Reserved26, + Reserved27, + Reserved28, + MacintoshCharacterSet, + OEMCharacterSet, + SymbolCharacterSet) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Thai_874, + JISJapan_932, + ChineseSimplified_936, + KoreanWansung_949, + ChineseTraditional_950, + KoreanJohab_1361, + Reserved22, + Reserved23) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + Latin1_1252, + Latin2EasternEurope_1250, + Cyrillic_1251, + Greek_1253, + Turkish_1254, + Hebrew_1255, + Arabic_1256, + WindowsBaltic_1257) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + IBMTurkish_857, + IBMCyrillic_855, + Latin2_852, + MSDOSBaltic_775, + Greek_737, + Arabic_708, + WELatin1_850, + US_437) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + IBMGreek_869, + MSDOSRussian_866, + MSDOSNordic_865, + Arabic_864, + MSDOSCanadianFrench_863, + Hebrew_862, + MSDOSIcelandic_861, + MSDOSPortuguese_860) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + Reserved40, + Reserved41, + Reserved42, + Reserved43, + Reserved44, + Reserved45, + Reserved46, + Reserved47) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + Reserved32, + Reserved33, + Reserved34, + Reserved35, + Reserved36, + Reserved37, + Reserved38, + Reserved39) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG Latin1_1252Mask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin2EasternEurope_1250Mask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG Cyrillic_1251Mask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG Greek_1253Mask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG Turkish_1254Mask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG Hebrew_1255Mask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG Arabic_1256Mask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG WindowsBaltic_1257Mask = SkOTSetULONGBit<7>::value; + static const SK_OT_ULONG Thai_874Mask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG JISJapan_932Mask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG ChineseSimplified_936Mask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG KoreanWansung_949Mask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG ChineseTraditional_950Mask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG KoreanJohab_1361Mask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG MacintoshCharacterSetMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG OEMCharacterSetMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG SymbolCharacterSetMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG IBMGreek_869Mask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG MSDOSRussian_866Mask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG MSDOSNordic_865Mask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG Arabic_864Mask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG MSDOSCanadianFrench_863Mask = SkOTSetULONGBit<52 - 32>::value; + static const SK_OT_ULONG Hebrew_862Mask = SkOTSetULONGBit<53 - 32>::value; + static const SK_OT_ULONG MSDOSIcelandic_861Mask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG MSDOSPortuguese_860Mask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG IBMTurkish_857Mask = SkOTSetULONGBit<56 - 32>::value; + static const SK_OT_ULONG IBMCyrillic_855Mask = SkOTSetULONGBit<57 - 32>::value; + static const SK_OT_ULONG Latin2_852Mask = SkOTSetULONGBit<58 - 32>::value; + static const SK_OT_ULONG MSDOSBaltic_775Mask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG Greek_737Mask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG Arabic_708Mask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG WELatin1_850Mask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG US_437Mask = SkOTSetULONGBit<63 - 32>::value; + }; + SK_OT_ULONG value[2]; + } raw; + } ulCodePageRange; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableOS2_V1) == 86, "sizeof_SkOTTableOS2_V1_not_86"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V2.h b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V2.h new file mode 100644 index 0000000000..cc5712dbce --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V2.h @@ -0,0 +1,538 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_OS_2_V2_DEFINED +#define SkOTTable_OS_2_V2_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkIBMFamilyClass.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkPanose.h" + +#pragma pack(push, 1) + +struct SkOTTableOS2_V2 { + SK_OT_USHORT version; + static const SK_OT_USHORT VERSION = SkTEndian_SwapBE16(2); + + SK_OT_SHORT xAvgCharWidth; + struct WeightClass { + enum Value : SK_OT_USHORT { + Thin = SkTEndian_SwapBE16(100), + ExtraLight = SkTEndian_SwapBE16(200), + Light = SkTEndian_SwapBE16(300), + Normal = SkTEndian_SwapBE16(400), + Medium = SkTEndian_SwapBE16(500), + SemiBold = SkTEndian_SwapBE16(600), + Bold = SkTEndian_SwapBE16(700), + ExtraBold = SkTEndian_SwapBE16(800), + Black = SkTEndian_SwapBE16(900), + }; + SK_OT_USHORT value; + } usWeightClass; + struct WidthClass { + enum Value : SK_OT_USHORT { + UltraCondensed = SkTEndian_SwapBE16(1), + ExtraCondensed = SkTEndian_SwapBE16(2), + Condensed = SkTEndian_SwapBE16(3), + SemiCondensed = SkTEndian_SwapBE16(4), + Medium = SkTEndian_SwapBE16(5), + SemiExpanded = SkTEndian_SwapBE16(6), + Expanded = SkTEndian_SwapBE16(7), + ExtraExpanded = SkTEndian_SwapBE16(8), + UltraExpanded = SkTEndian_SwapBE16(9), + } value; + } usWidthClass; + union Type { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + NoSubsetting, + Bitmap, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Reserved00, + Restricted, + PreviewPrint, + Editable, + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT Installable = 0; + static const SK_OT_USHORT RestrictedMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT PreviewPrintMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT EditableMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT NoSubsettingMask = SkOTSetUSHORTBit<8>::value; + static const SK_OT_USHORT BitmapMask = SkOTSetUSHORTBit<9>::value; + SK_OT_USHORT value; + } raw; + } fsType; + SK_OT_SHORT ySubscriptXSize; + SK_OT_SHORT ySubscriptYSize; + SK_OT_SHORT ySubscriptXOffset; + SK_OT_SHORT ySubscriptYOffset; + SK_OT_SHORT ySuperscriptXSize; + SK_OT_SHORT ySuperscriptYSize; + SK_OT_SHORT ySuperscriptXOffset; + SK_OT_SHORT ySuperscriptYOffset; + SK_OT_SHORT yStrikeoutSize; + SK_OT_SHORT yStrikeoutPosition; + SkIBMFamilyClass sFamilyClass; + SkPanose panose; + union UnicodeRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Thai, + Lao, + Georgian, + Reserved027, + HangulJamo, + LatinExtendedAdditional, + GreekExtended, + GeneralPunctuation) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Bengali, + Gurmukhi, + Gujarati, + Oriya, + Tamil, + Telugu, + Kannada, + Malayalam) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + Reserved008, + Cyrillic, + Armenian, + Hebrew, + Reserved012, + Arabic, + Reserved014, + Devanagari) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + BasicLatin, + Latin1Supplement, + LatinExtendedA, + LatinExtendedB, + IPAExtensions, + SpacingModifierLetters, + CombiningDiacriticalMarks, + Greek) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + Hangul, + Surrogates, + Reserved058, + CJKUnifiedIdeographs, + PrivateUseArea, + CJKCompatibilityIdeographs, + AlphabeticPresentationForms, + ArabicPresentationFormsA) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + CJKSymbolsAndPunctuation, + Hiragana, + Katakana, + Bopomofo, + HangulCompatibilityJamo, + CJKMiscellaneous, + EnclosedCJKLettersAndMonths, + CJKCompatibility) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + ControlPictures, + OpticalCharacterRecognition, + EnclosedAlphanumerics, + BoxDrawing, + BlockElements, + GeometricShapes, + MiscellaneousSymbols, + Dingbats) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + SuperscriptsAndSubscripts, + CurrencySymbols, + CombiningDiacriticalMarksForSymbols, + LetterlikeSymbols, + NumberForms, + Arrows, + MathematicalOperators, + MiscellaneousTechnical) + + //l2 24-31 + SK_OT_BYTE_BITFIELD( + Reserved088, + Reserved089, + Reserved090, + Reserved091, + Reserved092, + Reserved093, + Reserved094, + Reserved095) + //l2 16-23 + SK_OT_BYTE_BITFIELD( + Khmer, + Mongolian, + Braille, + Yi, + Reserved084, + Reserved085, + Reserved086, + Reserved087) + //l2 8-15 + SK_OT_BYTE_BITFIELD( + Thaana, + Sinhala, + Myanmar, + Ethiopic, + Cherokee, + UnifiedCanadianSyllabics, + Ogham, + Runic) + //l2 0-7 + SK_OT_BYTE_BITFIELD( + CombiningHalfMarks, + CJKCompatibilityForms, + SmallFormVariants, + ArabicPresentationFormsB, + HalfwidthAndFullwidthForms, + Specials, + Tibetan, + Syriac) + + //l3 24-31 + SK_OT_BYTE_BITFIELD( + Reserved120, + Reserved121, + Reserved122, + Reserved123, + Reserved124, + Reserved125, + Reserved126, + Reserved127) + //l3 16-23 + SK_OT_BYTE_BITFIELD( + Reserved112, + Reserved113, + Reserved114, + Reserved115, + Reserved116, + Reserved117, + Reserved118, + Reserved119) + //l3 8-15 + SK_OT_BYTE_BITFIELD( + Reserved104, + Reserved105, + Reserved106, + Reserved107, + Reserved108, + Reserved109, + Reserved110, + Reserved111) + //l3 0-7 + SK_OT_BYTE_BITFIELD( + Reserved096, + Reserved097, + Reserved098, + Reserved099, + Reserved100, + Reserved101, + Reserved102, + Reserved103) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG BasicLatinMask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin1SupplementMask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG LatinExtendedAMask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG LatinExtendedBMask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG IPAExtensionsMask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG SpacingModifierLettersMask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksMask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG GreekMask = SkOTSetULONGBit<7>::value; + //Reserved + static const SK_OT_ULONG CyrillicMask = SkOTSetULONGBit<9>::value; + static const SK_OT_ULONG ArmenianMask = SkOTSetULONGBit<10>::value; + static const SK_OT_ULONG HebrewMask = SkOTSetULONGBit<11>::value; + //Reserved + static const SK_OT_ULONG ArabicMask = SkOTSetULONGBit<13>::value; + //Reserved + static const SK_OT_ULONG DevanagariMask = SkOTSetULONGBit<15>::value; + static const SK_OT_ULONG BengaliMask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG GurmukhiMask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG GujaratiMask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG OriyaMask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG TamilMask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG TeluguMask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG KannadaMask = SkOTSetULONGBit<22>::value; + static const SK_OT_ULONG MalayalamMask = SkOTSetULONGBit<23>::value; + static const SK_OT_ULONG ThaiMask = SkOTSetULONGBit<24>::value; + static const SK_OT_ULONG LaoMask = SkOTSetULONGBit<25>::value; + static const SK_OT_ULONG GeorgianMask = SkOTSetULONGBit<26>::value; + //Reserved + static const SK_OT_ULONG HangulJamoMask = SkOTSetULONGBit<28>::value; + static const SK_OT_ULONG LatinExtendedAdditionalMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG GreekExtendedMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG GeneralPunctuationMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG SuperscriptsAndSubscriptsMask = SkOTSetULONGBit<32 - 32>::value; + static const SK_OT_ULONG CurrencySymbolsMask = SkOTSetULONGBit<33 - 32>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksForSymbolsMask = SkOTSetULONGBit<34 - 32>::value; + static const SK_OT_ULONG LetterlikeSymbolsMask = SkOTSetULONGBit<35 - 32>::value; + static const SK_OT_ULONG NumberFormsMask = SkOTSetULONGBit<36 - 32>::value; + static const SK_OT_ULONG ArrowsMask = SkOTSetULONGBit<37 - 32>::value; + static const SK_OT_ULONG MathematicalOperatorsMask = SkOTSetULONGBit<38 - 32>::value; + static const SK_OT_ULONG MiscellaneousTechnicalMask = SkOTSetULONGBit<39 - 32>::value; + static const SK_OT_ULONG ControlPicturesMask = SkOTSetULONGBit<40 - 32>::value; + static const SK_OT_ULONG OpticalCharacterRecognitionMask = SkOTSetULONGBit<41 - 32>::value; + static const SK_OT_ULONG EnclosedAlphanumericsMask = SkOTSetULONGBit<42 - 32>::value; + static const SK_OT_ULONG BoxDrawingMask = SkOTSetULONGBit<43 - 32>::value; + static const SK_OT_ULONG BlockElementsMask = SkOTSetULONGBit<44 - 32>::value; + static const SK_OT_ULONG GeometricShapesMask = SkOTSetULONGBit<45 - 32>::value; + static const SK_OT_ULONG MiscellaneousSymbolsMask = SkOTSetULONGBit<46 - 32>::value; + static const SK_OT_ULONG DingbatsMask = SkOTSetULONGBit<47 - 32>::value; + static const SK_OT_ULONG CJKSymbolsAndPunctuationMask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG HiraganaMask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG KatakanaMask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG BopomofoMask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG HangulCompatibilityJamoMask = SkOTSetULONGBit<52 - 32>::value; + static const SK_OT_ULONG CJKMiscellaneousMask = SkOTSetULONGBit<53 - 32>::value; + static const SK_OT_ULONG EnclosedCJKLettersAndMonthsMask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityMask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG HangulMask = SkOTSetULONGBit<56 - 32>::value; + static const SK_OT_ULONG SurrogatesMask = SkOTSetULONGBit<57 - 32>::value; + //Reserved + static const SK_OT_ULONG CJKUnifiedIdeographsMask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG PrivateUseAreaMask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityIdeographsMask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG AlphabeticPresentationFormsMask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG ArabicPresentationFormsAMask = SkOTSetULONGBit<63 - 32>::value; + }; + struct l2 { + static const SK_OT_ULONG CombiningHalfMarksMask = SkOTSetULONGBit<64 - 64>::value; + static const SK_OT_ULONG CJKCompatibilityFormsMask = SkOTSetULONGBit<65 - 64>::value; + static const SK_OT_ULONG SmallFormVariantsMask = SkOTSetULONGBit<66 - 64>::value; + static const SK_OT_ULONG ArabicPresentationFormsBMask = SkOTSetULONGBit<67 - 64>::value; + static const SK_OT_ULONG HalfwidthAndFullwidthFormsMask = SkOTSetULONGBit<68 - 64>::value; + static const SK_OT_ULONG SpecialsMask = SkOTSetULONGBit<69 - 64>::value; + static const SK_OT_ULONG TibetanMask = SkOTSetULONGBit<70 - 64>::value; + static const SK_OT_ULONG SyriacMask = SkOTSetULONGBit<71 - 64>::value; + static const SK_OT_ULONG ThaanaMask = SkOTSetULONGBit<72 - 64>::value; + static const SK_OT_ULONG SinhalaMask = SkOTSetULONGBit<73 - 64>::value; + static const SK_OT_ULONG MyanmarMask = SkOTSetULONGBit<74 - 64>::value; + static const SK_OT_ULONG EthiopicMask = SkOTSetULONGBit<75 - 64>::value; + static const SK_OT_ULONG CherokeeMask = SkOTSetULONGBit<76 - 64>::value; + static const SK_OT_ULONG UnifiedCanadianSyllabicsMask = SkOTSetULONGBit<77 - 64>::value; + static const SK_OT_ULONG OghamMask = SkOTSetULONGBit<78 - 64>::value; + static const SK_OT_ULONG RunicMask = SkOTSetULONGBit<79 - 64>::value; + static const SK_OT_ULONG KhmerMask = SkOTSetULONGBit<80 - 64>::value; + static const SK_OT_ULONG MongolianMask = SkOTSetULONGBit<81 - 64>::value; + static const SK_OT_ULONG BrailleMask = SkOTSetULONGBit<82 - 64>::value; + static const SK_OT_ULONG YiMask = SkOTSetULONGBit<83 - 64>::value; + }; + SK_OT_ULONG value[4]; + } raw; + } ulUnicodeRange; + SK_OT_CHAR achVendID[4]; + union Selection { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Italic, + Underscore, + Negative, + Outlined, + Strikeout, + Bold, + Regular, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT ItalicMask = SkOTSetUSHORTBit<0>::value; + static const SK_OT_USHORT UnderscoreMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT NegativeMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT OutlinedMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT StrikeoutMask = SkOTSetUSHORTBit<4>::value; + static const SK_OT_USHORT BoldMask = SkOTSetUSHORTBit<5>::value; + static const SK_OT_USHORT RegularMask = SkOTSetUSHORTBit<6>::value; + SK_OT_USHORT value; + } raw; + } fsSelection; + SK_OT_USHORT usFirstCharIndex; + SK_OT_USHORT usLastCharIndex; + //version0 + SK_OT_SHORT sTypoAscender; + SK_OT_SHORT sTypoDescender; + SK_OT_SHORT sTypoLineGap; + SK_OT_USHORT usWinAscent; + SK_OT_USHORT usWinDescent; + //version1 + union CodePageRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Reserved24, + Reserved25, + Reserved26, + Reserved27, + Reserved28, + MacintoshCharacterSet, + OEMCharacterSet, + SymbolCharacterSet) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Thai_874, + JISJapan_932, + ChineseSimplified_936, + KoreanWansung_949, + ChineseTraditional_950, + KoreanJohab_1361, + Reserved22, + Reserved23) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + Vietnamese, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + Latin1_1252, + Latin2EasternEurope_1250, + Cyrillic_1251, + Greek_1253, + Turkish_1254, + Hebrew_1255, + Arabic_1256, + WindowsBaltic_1257) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + IBMTurkish_857, + IBMCyrillic_855, + Latin2_852, + MSDOSBaltic_775, + Greek_737, + Arabic_708, + WELatin1_850, + US_437) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + IBMGreek_869, + MSDOSRussian_866, + MSDOSNordic_865, + Arabic_864, + MSDOSCanadianFrench_863, + Hebrew_862, + MSDOSIcelandic_861, + MSDOSPortuguese_860) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + Reserved40, + Reserved41, + Reserved42, + Reserved43, + Reserved44, + Reserved45, + Reserved46, + Reserved47) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + Reserved32, + Reserved33, + Reserved34, + Reserved35, + Reserved36, + Reserved37, + Reserved38, + Reserved39) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG Latin1_1252Mask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin2EasternEurope_1250Mask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG Cyrillic_1251Mask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG Greek_1253Mask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG Turkish_1254Mask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG Hebrew_1255Mask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG Arabic_1256Mask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG WindowsBaltic_1257Mask = SkOTSetULONGBit<7>::value; + static const SK_OT_ULONG Vietnamese_1258Mask = SkOTSetULONGBit<8>::value; + static const SK_OT_ULONG Thai_874Mask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG JISJapan_932Mask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG ChineseSimplified_936Mask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG KoreanWansung_949Mask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG ChineseTraditional_950Mask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG KoreanJohab_1361Mask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG MacintoshCharacterSetMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG OEMCharacterSetMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG SymbolCharacterSetMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG IBMGreek_869Mask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG MSDOSRussian_866Mask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG MSDOSNordic_865Mask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG Arabic_864Mask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG MSDOSCanadianFrench_863Mask = SkOTSetULONGBit<52 - 32>::value; + static const SK_OT_ULONG Hebrew_862Mask = SkOTSetULONGBit<53 - 32>::value; + static const SK_OT_ULONG MSDOSIcelandic_861Mask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG MSDOSPortuguese_860Mask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG IBMTurkish_857Mask = SkOTSetULONGBit<56 - 32>::value; + static const SK_OT_ULONG IBMCyrillic_855Mask = SkOTSetULONGBit<57 - 32>::value; + static const SK_OT_ULONG Latin2_852Mask = SkOTSetULONGBit<58 - 32>::value; + static const SK_OT_ULONG MSDOSBaltic_775Mask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG Greek_737Mask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG Arabic_708Mask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG WELatin1_850Mask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG US_437Mask = SkOTSetULONGBit<63 - 32>::value; + }; + SK_OT_ULONG value[2]; + } raw; + } ulCodePageRange; + //version2 + SK_OT_SHORT sxHeight; + SK_OT_SHORT sCapHeight; + SK_OT_USHORT usDefaultChar; + SK_OT_USHORT usBreakChar; + SK_OT_USHORT usMaxContext; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableOS2_V2) == 96, "sizeof_SkOTTableOS2_V2_not_96"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V3.h b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V3.h new file mode 100644 index 0000000000..2474282842 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V3.h @@ -0,0 +1,547 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_OS_2_V3_DEFINED +#define SkOTTable_OS_2_V3_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkIBMFamilyClass.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkPanose.h" + +#pragma pack(push, 1) + +struct SkOTTableOS2_V3 { + SK_OT_USHORT version; + static const SK_OT_USHORT VERSION = SkTEndian_SwapBE16(3); + + SK_OT_SHORT xAvgCharWidth; + struct WeightClass { + enum Value : SK_OT_USHORT { + Thin = SkTEndian_SwapBE16(100), + ExtraLight = SkTEndian_SwapBE16(200), + Light = SkTEndian_SwapBE16(300), + Normal = SkTEndian_SwapBE16(400), + Medium = SkTEndian_SwapBE16(500), + SemiBold = SkTEndian_SwapBE16(600), + Bold = SkTEndian_SwapBE16(700), + ExtraBold = SkTEndian_SwapBE16(800), + Black = SkTEndian_SwapBE16(900), + }; + SK_OT_USHORT value; + } usWeightClass; + struct WidthClass { + enum Value : SK_OT_USHORT { + UltraCondensed = SkTEndian_SwapBE16(1), + ExtraCondensed = SkTEndian_SwapBE16(2), + Condensed = SkTEndian_SwapBE16(3), + SemiCondensed = SkTEndian_SwapBE16(4), + Medium = SkTEndian_SwapBE16(5), + SemiExpanded = SkTEndian_SwapBE16(6), + Expanded = SkTEndian_SwapBE16(7), + ExtraExpanded = SkTEndian_SwapBE16(8), + UltraExpanded = SkTEndian_SwapBE16(9), + } value; + } usWidthClass; + union Type { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + NoSubsetting, + Bitmap, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Reserved00, + Restricted, + PreviewPrint, + Editable, + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT Installable = 0; + static const SK_OT_USHORT RestrictedMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT PreviewPrintMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT EditableMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT NoSubsettingMask = SkOTSetUSHORTBit<8>::value; + static const SK_OT_USHORT BitmapMask = SkOTSetUSHORTBit<9>::value; + SK_OT_USHORT value; + } raw; + } fsType; + SK_OT_SHORT ySubscriptXSize; + SK_OT_SHORT ySubscriptYSize; + SK_OT_SHORT ySubscriptXOffset; + SK_OT_SHORT ySubscriptYOffset; + SK_OT_SHORT ySuperscriptXSize; + SK_OT_SHORT ySuperscriptYSize; + SK_OT_SHORT ySuperscriptXOffset; + SK_OT_SHORT ySuperscriptYOffset; + SK_OT_SHORT yStrikeoutSize; + SK_OT_SHORT yStrikeoutPosition; + SkIBMFamilyClass sFamilyClass; + SkPanose panose; + union UnicodeRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Thai, + Lao, + Georgian, + Reserved027, + HangulJamo, + LatinExtendedAdditional, + GreekExtended, + GeneralPunctuation) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Bengali, + Gurmukhi, + Gujarati, + Oriya, + Tamil, + Telugu, + Kannada, + Malayalam) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + Reserved008, + Cyrillic, + Armenian, + Hebrew, + Reserved012, + Arabic, + Reserved014, + Devanagari) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + BasicLatin, + Latin1Supplement, + LatinExtendedA, + LatinExtendedB, + IPAExtensions, + SpacingModifierLetters, + CombiningDiacriticalMarks, + GreekAndCoptic) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + Hangul, + NonPlane0, + Reserved058, + CJKUnifiedIdeographs, + PrivateUseArea, + CJKCompatibilityIdeographs, + AlphabeticPresentationForms, + ArabicPresentationFormsA) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + CJKSymbolsAndPunctuation, + Hiragana, + Katakana, + Bopomofo, + HangulCompatibilityJamo, + Reserved053, + EnclosedCJKLettersAndMonths, + CJKCompatibility) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + ControlPictures, + OpticalCharacterRecognition, + EnclosedAlphanumerics, + BoxDrawing, + BlockElements, + GeometricShapes, + MiscellaneousSymbols, + Dingbats) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + SuperscriptsAndSubscripts, + CurrencySymbols, + CombiningDiacriticalMarksForSymbols, + LetterlikeSymbols, + NumberForms, + Arrows, + MathematicalOperators, + MiscellaneousTechnical) + + //l2 24-31 + SK_OT_BYTE_BITFIELD( + MusicalSymbols, + MathematicalAlphanumericSymbols, + PrivateUse, + VariationSelectors, + Tags, + Reserved093, + Reserved094, + Reserved095) + //l2 16-23 + SK_OT_BYTE_BITFIELD( + Khmer, + Mongolian, + Braille, + Yi, + Tagalog_Hanunoo_Buhid_Tagbanwa, + OldItalic, + Gothic, + Deseret) + //l2 8-15 + SK_OT_BYTE_BITFIELD( + Thaana, + Sinhala, + Myanmar, + Ethiopic, + Cherokee, + UnifiedCanadianSyllabics, + Ogham, + Runic) + //l2 0-7 + SK_OT_BYTE_BITFIELD( + CombiningHalfMarks, + CJKCompatibilityForms, + SmallFormVariants, + ArabicPresentationFormsB, + HalfwidthAndFullwidthForms, + Specials, + Tibetan, + Syriac) + + //l3 24-31 + SK_OT_BYTE_BITFIELD( + Reserved120, + Reserved121, + Reserved122, + Reserved123, + Reserved124, + Reserved125, + Reserved126, + Reserved127) + //l3 16-23 + SK_OT_BYTE_BITFIELD( + Reserved112, + Reserved113, + Reserved114, + Reserved115, + Reserved116, + Reserved117, + Reserved118, + Reserved119) + //l3 8-15 + SK_OT_BYTE_BITFIELD( + Reserved104, + Reserved105, + Reserved106, + Reserved107, + Reserved108, + Reserved109, + Reserved110, + Reserved111) + //l3 0-7 + SK_OT_BYTE_BITFIELD( + Reserved096, + Reserved097, + Reserved098, + Reserved099, + Reserved100, + Reserved101, + Reserved102, + Reserved103) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG BasicLatinMask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin1SupplementMask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG LatinExtendedAMask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG LatinExtendedBMask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG IPAExtensionsMask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG SpacingModifierLettersMask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksMask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG GreekAndCopticMask = SkOTSetULONGBit<7>::value; + //Reserved + static const SK_OT_ULONG CyrillicMask = SkOTSetULONGBit<9>::value; + static const SK_OT_ULONG ArmenianMask = SkOTSetULONGBit<10>::value; + static const SK_OT_ULONG HebrewMask = SkOTSetULONGBit<11>::value; + //Reserved + static const SK_OT_ULONG ArabicMask = SkOTSetULONGBit<13>::value; + //Reserved + static const SK_OT_ULONG DevanagariMask = SkOTSetULONGBit<15>::value; + static const SK_OT_ULONG BengaliMask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG GurmukhiMask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG GujaratiMask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG OriyaMask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG TamilMask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG TeluguMask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG KannadaMask = SkOTSetULONGBit<22>::value; + static const SK_OT_ULONG MalayalamMask = SkOTSetULONGBit<23>::value; + static const SK_OT_ULONG ThaiMask = SkOTSetULONGBit<24>::value; + static const SK_OT_ULONG LaoMask = SkOTSetULONGBit<25>::value; + static const SK_OT_ULONG GeorgianMask = SkOTSetULONGBit<26>::value; + //Reserved + static const SK_OT_ULONG HangulJamoMask = SkOTSetULONGBit<28>::value; + static const SK_OT_ULONG LatinExtendedAdditionalMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG GreekExtendedMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG GeneralPunctuationMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG SuperscriptsAndSubscriptsMask = SkOTSetULONGBit<32 - 32>::value; + static const SK_OT_ULONG CurrencySymbolsMask = SkOTSetULONGBit<33 - 32>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksForSymbolsMask = SkOTSetULONGBit<34 - 32>::value; + static const SK_OT_ULONG LetterlikeSymbolsMask = SkOTSetULONGBit<35 - 32>::value; + static const SK_OT_ULONG NumberFormsMask = SkOTSetULONGBit<36 - 32>::value; + static const SK_OT_ULONG ArrowsMask = SkOTSetULONGBit<37 - 32>::value; + static const SK_OT_ULONG MathematicalOperatorsMask = SkOTSetULONGBit<38 - 32>::value; + static const SK_OT_ULONG MiscellaneousTechnicalMask = SkOTSetULONGBit<39 - 32>::value; + static const SK_OT_ULONG ControlPicturesMask = SkOTSetULONGBit<40 - 32>::value; + static const SK_OT_ULONG OpticalCharacterRecognitionMask = SkOTSetULONGBit<41 - 32>::value; + static const SK_OT_ULONG EnclosedAlphanumericsMask = SkOTSetULONGBit<42 - 32>::value; + static const SK_OT_ULONG BoxDrawingMask = SkOTSetULONGBit<43 - 32>::value; + static const SK_OT_ULONG BlockElementsMask = SkOTSetULONGBit<44 - 32>::value; + static const SK_OT_ULONG GeometricShapesMask = SkOTSetULONGBit<45 - 32>::value; + static const SK_OT_ULONG MiscellaneousSymbolsMask = SkOTSetULONGBit<46 - 32>::value; + static const SK_OT_ULONG DingbatsMask = SkOTSetULONGBit<47 - 32>::value; + static const SK_OT_ULONG CJKSymbolsAndPunctuationMask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG HiraganaMask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG KatakanaMask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG BopomofoMask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG HangulCompatibilityJamoMask = SkOTSetULONGBit<52 - 32>::value; + //Reserved + static const SK_OT_ULONG EnclosedCJKLettersAndMonthsMask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityMask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG HangulMask = SkOTSetULONGBit<56 - 32>::value; + static const SK_OT_ULONG NonPlane0Mask = SkOTSetULONGBit<57 - 32>::value; + //Reserved + static const SK_OT_ULONG CJKUnifiedIdeographsMask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG PrivateUseAreaMask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityIdeographsMask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG AlphabeticPresentationFormsMask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG ArabicPresentationFormsAMask = SkOTSetULONGBit<63 - 32>::value; + }; + struct l2 { + static const SK_OT_ULONG CombiningHalfMarksMask = SkOTSetULONGBit<64 - 64>::value; + static const SK_OT_ULONG CJKCompatibilityFormsMask = SkOTSetULONGBit<65 - 64>::value; + static const SK_OT_ULONG SmallFormVariantsMask = SkOTSetULONGBit<66 - 64>::value; + static const SK_OT_ULONG ArabicPresentationFormsBMask = SkOTSetULONGBit<67 - 64>::value; + static const SK_OT_ULONG HalfwidthAndFullwidthFormsMask = SkOTSetULONGBit<68 - 64>::value; + static const SK_OT_ULONG SpecialsMask = SkOTSetULONGBit<69 - 64>::value; + static const SK_OT_ULONG TibetanMask = SkOTSetULONGBit<70 - 64>::value; + static const SK_OT_ULONG SyriacMask = SkOTSetULONGBit<71 - 64>::value; + static const SK_OT_ULONG ThaanaMask = SkOTSetULONGBit<72 - 64>::value; + static const SK_OT_ULONG SinhalaMask = SkOTSetULONGBit<73 - 64>::value; + static const SK_OT_ULONG MyanmarMask = SkOTSetULONGBit<74 - 64>::value; + static const SK_OT_ULONG EthiopicMask = SkOTSetULONGBit<75 - 64>::value; + static const SK_OT_ULONG CherokeeMask = SkOTSetULONGBit<76 - 64>::value; + static const SK_OT_ULONG UnifiedCanadianSyllabicsMask = SkOTSetULONGBit<77 - 64>::value; + static const SK_OT_ULONG OghamMask = SkOTSetULONGBit<78 - 64>::value; + static const SK_OT_ULONG RunicMask = SkOTSetULONGBit<79 - 64>::value; + static const SK_OT_ULONG KhmerMask = SkOTSetULONGBit<80 - 64>::value; + static const SK_OT_ULONG MongolianMask = SkOTSetULONGBit<81 - 64>::value; + static const SK_OT_ULONG BrailleMask = SkOTSetULONGBit<82 - 64>::value; + static const SK_OT_ULONG YiMask = SkOTSetULONGBit<83 - 64>::value; + static const SK_OT_ULONG Tagalog_Hanunoo_Buhid_TagbanwaMask = SkOTSetULONGBit<84 - 64>::value; + static const SK_OT_ULONG OldItalicMask = SkOTSetULONGBit<85 - 64>::value; + static const SK_OT_ULONG GothicMask = SkOTSetULONGBit<86 - 64>::value; + static const SK_OT_ULONG DeseretMask = SkOTSetULONGBit<87 - 64>::value; + static const SK_OT_ULONG MusicalSymbolsMask = SkOTSetULONGBit<88 - 64>::value; + static const SK_OT_ULONG MathematicalAlphanumericSymbolsMask = SkOTSetULONGBit<89 - 64>::value; + static const SK_OT_ULONG PrivateUseMask = SkOTSetULONGBit<90 - 64>::value; + static const SK_OT_ULONG VariationSelectorsMask = SkOTSetULONGBit<91 - 64>::value; + static const SK_OT_ULONG TagsMask = SkOTSetULONGBit<92 - 64>::value; + }; + SK_OT_ULONG value[4]; + } raw; + } ulUnicodeRange; + SK_OT_CHAR achVendID[4]; + union Selection { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Italic, + Underscore, + Negative, + Outlined, + Strikeout, + Bold, + Regular, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT ItalicMask = SkOTSetUSHORTBit<0>::value; + static const SK_OT_USHORT UnderscoreMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT NegativeMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT OutlinedMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT StrikeoutMask = SkOTSetUSHORTBit<4>::value; + static const SK_OT_USHORT BoldMask = SkOTSetUSHORTBit<5>::value; + static const SK_OT_USHORT RegularMask = SkOTSetUSHORTBit<6>::value; + SK_OT_USHORT value; + } raw; + } fsSelection; + SK_OT_USHORT usFirstCharIndex; + SK_OT_USHORT usLastCharIndex; + //version0 + SK_OT_SHORT sTypoAscender; + SK_OT_SHORT sTypoDescender; + SK_OT_SHORT sTypoLineGap; + SK_OT_USHORT usWinAscent; + SK_OT_USHORT usWinDescent; + //version1 + union CodePageRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Reserved24, + Reserved25, + Reserved26, + Reserved27, + Reserved28, + MacintoshCharacterSet, + OEMCharacterSet, + SymbolCharacterSet) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Thai_874, + JISJapan_932, + ChineseSimplified_936, + KoreanWansung_949, + ChineseTraditional_950, + KoreanJohab_1361, + Reserved22, + Reserved23) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + Vietnamese, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + Latin1_1252, + Latin2EasternEurope_1250, + Cyrillic_1251, + Greek_1253, + Turkish_1254, + Hebrew_1255, + Arabic_1256, + WindowsBaltic_1257) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + IBMTurkish_857, + IBMCyrillic_855, + Latin2_852, + MSDOSBaltic_775, + Greek_737, + Arabic_708, + WELatin1_850, + US_437) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + IBMGreek_869, + MSDOSRussian_866, + MSDOSNordic_865, + Arabic_864, + MSDOSCanadianFrench_863, + Hebrew_862, + MSDOSIcelandic_861, + MSDOSPortuguese_860) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + Reserved40, + Reserved41, + Reserved42, + Reserved43, + Reserved44, + Reserved45, + Reserved46, + Reserved47) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + Reserved32, + Reserved33, + Reserved34, + Reserved35, + Reserved36, + Reserved37, + Reserved38, + Reserved39) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG Latin1_1252Mask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin2EasternEurope_1250Mask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG Cyrillic_1251Mask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG Greek_1253Mask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG Turkish_1254Mask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG Hebrew_1255Mask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG Arabic_1256Mask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG WindowsBaltic_1257Mask = SkOTSetULONGBit<7>::value; + static const SK_OT_ULONG Vietnamese_1258Mask = SkOTSetULONGBit<8>::value; + static const SK_OT_ULONG Thai_874Mask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG JISJapan_932Mask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG ChineseSimplified_936Mask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG KoreanWansung_949Mask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG ChineseTraditional_950Mask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG KoreanJohab_1361Mask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG MacintoshCharacterSetMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG OEMCharacterSetMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG SymbolCharacterSetMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG IBMGreek_869Mask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG MSDOSRussian_866Mask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG MSDOSNordic_865Mask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG Arabic_864Mask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG MSDOSCanadianFrench_863Mask = SkOTSetULONGBit<52 - 32>::value; + static const SK_OT_ULONG Hebrew_862Mask = SkOTSetULONGBit<53 - 32>::value; + static const SK_OT_ULONG MSDOSIcelandic_861Mask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG MSDOSPortuguese_860Mask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG IBMTurkish_857Mask = SkOTSetULONGBit<56 - 32>::value; + static const SK_OT_ULONG IBMCyrillic_855Mask = SkOTSetULONGBit<57 - 32>::value; + static const SK_OT_ULONG Latin2_852Mask = SkOTSetULONGBit<58 - 32>::value; + static const SK_OT_ULONG MSDOSBaltic_775Mask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG Greek_737Mask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG Arabic_708Mask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG WELatin1_850Mask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG US_437Mask = SkOTSetULONGBit<63 - 32>::value; + }; + SK_OT_ULONG value[2]; + } raw; + } ulCodePageRange; + //version2 + SK_OT_SHORT sxHeight; + SK_OT_SHORT sCapHeight; + SK_OT_USHORT usDefaultChar; + SK_OT_USHORT usBreakChar; + SK_OT_USHORT usMaxContext; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableOS2_V3) == 96, "sizeof_SkOTTableOS2_V3_not_96"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V4.h b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V4.h new file mode 100644 index 0000000000..14bd9a0d2c --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_V4.h @@ -0,0 +1,582 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_OS_2_V4_DEFINED +#define SkOTTable_OS_2_V4_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkIBMFamilyClass.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkPanose.h" + +#pragma pack(push, 1) + +struct SkOTTableOS2_V4 { + SK_OT_USHORT version; + static const SK_OT_USHORT VERSION = SkTEndian_SwapBE16(4); + + SK_OT_SHORT xAvgCharWidth; + struct WeightClass { + enum Value : SK_OT_USHORT { + Thin = SkTEndian_SwapBE16(100), + ExtraLight = SkTEndian_SwapBE16(200), + Light = SkTEndian_SwapBE16(300), + Normal = SkTEndian_SwapBE16(400), + Medium = SkTEndian_SwapBE16(500), + SemiBold = SkTEndian_SwapBE16(600), + Bold = SkTEndian_SwapBE16(700), + ExtraBold = SkTEndian_SwapBE16(800), + Black = SkTEndian_SwapBE16(900), + }; + SK_OT_USHORT value; + } usWeightClass; + struct WidthClass { + enum Value : SK_OT_USHORT { + UltraCondensed = SkTEndian_SwapBE16(1), + ExtraCondensed = SkTEndian_SwapBE16(2), + Condensed = SkTEndian_SwapBE16(3), + SemiCondensed = SkTEndian_SwapBE16(4), + Medium = SkTEndian_SwapBE16(5), + SemiExpanded = SkTEndian_SwapBE16(6), + Expanded = SkTEndian_SwapBE16(7), + ExtraExpanded = SkTEndian_SwapBE16(8), + UltraExpanded = SkTEndian_SwapBE16(9), + } value; + } usWidthClass; + union Type { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + NoSubsetting, + Bitmap, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Reserved00, + Restricted, + PreviewPrint, + Editable, + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT Installable = 0; + static const SK_OT_USHORT RestrictedMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT PreviewPrintMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT EditableMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT NoSubsettingMask = SkOTSetUSHORTBit<8>::value; + static const SK_OT_USHORT BitmapMask = SkOTSetUSHORTBit<9>::value; + SK_OT_USHORT value; + } raw; + } fsType; + SK_OT_SHORT ySubscriptXSize; + SK_OT_SHORT ySubscriptYSize; + SK_OT_SHORT ySubscriptXOffset; + SK_OT_SHORT ySubscriptYOffset; + SK_OT_SHORT ySuperscriptXSize; + SK_OT_SHORT ySuperscriptYSize; + SK_OT_SHORT ySuperscriptXOffset; + SK_OT_SHORT ySuperscriptYOffset; + SK_OT_SHORT yStrikeoutSize; + SK_OT_SHORT yStrikeoutPosition; + SkIBMFamilyClass sFamilyClass; + SkPanose panose; + union UnicodeRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Thai, + Lao, + Georgian, + Balinese, + HangulJamo, + LatinExtendedAdditional, + GreekExtended, + GeneralPunctuation) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Bengali, + Gurmukhi, + Gujarati, + Oriya, + Tamil, + Telugu, + Kannada, + Malayalam) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + Coptic, + Cyrillic, + Armenian, + Hebrew, + Vai, + Arabic, + NKo, + Devanagari) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + BasicLatin, + Latin1Supplement, + LatinExtendedA, + LatinExtendedB, + IPAExtensions, + SpacingModifierLetters, + CombiningDiacriticalMarks, + GreekAndCoptic) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + Hangul, + NonPlane0, + Phoenician, + CJKUnifiedIdeographs, + PrivateUseArea, + CJKCompatibilityIdeographs, + AlphabeticPresentationForms, + ArabicPresentationFormsA) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + CJKSymbolsAndPunctuation, + Hiragana, + Katakana, + Bopomofo, + HangulCompatibilityJamo, + PhagsPa, + EnclosedCJKLettersAndMonths, + CJKCompatibility) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + ControlPictures, + OpticalCharacterRecognition, + EnclosedAlphanumerics, + BoxDrawing, + BlockElements, + GeometricShapes, + MiscellaneousSymbols, + Dingbats) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + SuperscriptsAndSubscripts, + CurrencySymbols, + CombiningDiacriticalMarksForSymbols, + LetterlikeSymbols, + NumberForms, + Arrows, + MathematicalOperators, + MiscellaneousTechnical) + + //l2 24-31 + SK_OT_BYTE_BITFIELD( + MusicalSymbols, + MathematicalAlphanumericSymbols, + PrivateUse, + VariationSelectors, + Tags, + Limbu, + TaiLe, + NewTaiLue) + //l2 16-23 + SK_OT_BYTE_BITFIELD( + Khmer, + Mongolian, + Braille, + Yi, + Tagalog_Hanunoo_Buhid_Tagbanwa, + OldItalic, + Gothic, + Deseret) + //l2 8-15 + SK_OT_BYTE_BITFIELD( + Thaana, + Sinhala, + Myanmar, + Ethiopic, + Cherokee, + UnifiedCanadianSyllabics, + Ogham, + Runic) + //l2 0-7 + SK_OT_BYTE_BITFIELD( + CombiningHalfMarks, + CJKCompatibilityForms, + SmallFormVariants, + ArabicPresentationFormsB, + HalfwidthAndFullwidthForms, + Specials, + Tibetan, + Syriac) + + //l3 24-31 + SK_OT_BYTE_BITFIELD( + PhaistosDisc, + Carian_Lycian_Lydian, + DominoTiles_MahjongTiles, + Reserved123, + Reserved124, + Reserved125, + Reserved126, + Reserved127) + //l3 16-23 + SK_OT_BYTE_BITFIELD( + Sundanese, + Lepcha, + OlChiki, + Saurashtra, + KayahLi, + Rejang, + Cham, + AncientSymbols) + //l3 8-15 + SK_OT_BYTE_BITFIELD( + OldPersian, + Shavian, + Osmanya, + CypriotSyllabary, + Kharoshthi, + TaiXuanJingSymbols, + Cuneiform, + CountingRodNumerals) + //l3 0-7 + SK_OT_BYTE_BITFIELD( + Buginese, + Glagolitic, + Tifinagh, + YijingHexagramSymbols, + SylotiNagri, + LinearB_AegeanNumbers, + AncientGreekNumbers, + Ugaritic) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG BasicLatinMask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin1SupplementMask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG LatinExtendedAMask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG LatinExtendedBMask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG IPAExtensionsMask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG SpacingModifierLettersMask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksMask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG GreekAndCopticMask = SkOTSetULONGBit<7>::value; + static const SK_OT_ULONG CopticMask = SkOTSetULONGBit<8>::value; + static const SK_OT_ULONG CyrillicMask = SkOTSetULONGBit<9>::value; + static const SK_OT_ULONG ArmenianMask = SkOTSetULONGBit<10>::value; + static const SK_OT_ULONG HebrewMask = SkOTSetULONGBit<11>::value; + static const SK_OT_ULONG VaiMask = SkOTSetULONGBit<12>::value; + static const SK_OT_ULONG ArabicMask = SkOTSetULONGBit<13>::value; + static const SK_OT_ULONG NKoMask = SkOTSetULONGBit<14>::value; + static const SK_OT_ULONG DevanagariMask = SkOTSetULONGBit<15>::value; + static const SK_OT_ULONG BengaliMask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG GurmukhiMask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG GujaratiMask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG OriyaMask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG TamilMask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG TeluguMask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG KannadaMask = SkOTSetULONGBit<22>::value; + static const SK_OT_ULONG MalayalamMask = SkOTSetULONGBit<23>::value; + static const SK_OT_ULONG ThaiMask = SkOTSetULONGBit<24>::value; + static const SK_OT_ULONG LaoMask = SkOTSetULONGBit<25>::value; + static const SK_OT_ULONG GeorgianMask = SkOTSetULONGBit<26>::value; + static const SK_OT_ULONG BalineseMask = SkOTSetULONGBit<27>::value; + static const SK_OT_ULONG HangulJamoMask = SkOTSetULONGBit<28>::value; + static const SK_OT_ULONG LatinExtendedAdditionalMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG GreekExtendedMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG GeneralPunctuationMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG SuperscriptsAndSubscriptsMask = SkOTSetULONGBit<32 - 32>::value; + static const SK_OT_ULONG CurrencySymbolsMask = SkOTSetULONGBit<33 - 32>::value; + static const SK_OT_ULONG CombiningDiacriticalMarksForSymbolsMask = SkOTSetULONGBit<34 - 32>::value; + static const SK_OT_ULONG LetterlikeSymbolsMask = SkOTSetULONGBit<35 - 32>::value; + static const SK_OT_ULONG NumberFormsMask = SkOTSetULONGBit<36 - 32>::value; + static const SK_OT_ULONG ArrowsMask = SkOTSetULONGBit<37 - 32>::value; + static const SK_OT_ULONG MathematicalOperatorsMask = SkOTSetULONGBit<38 - 32>::value; + static const SK_OT_ULONG MiscellaneousTechnicalMask = SkOTSetULONGBit<39 - 32>::value; + static const SK_OT_ULONG ControlPicturesMask = SkOTSetULONGBit<40 - 32>::value; + static const SK_OT_ULONG OpticalCharacterRecognitionMask = SkOTSetULONGBit<41 - 32>::value; + static const SK_OT_ULONG EnclosedAlphanumericsMask = SkOTSetULONGBit<42 - 32>::value; + static const SK_OT_ULONG BoxDrawingMask = SkOTSetULONGBit<43 - 32>::value; + static const SK_OT_ULONG BlockElementsMask = SkOTSetULONGBit<44 - 32>::value; + static const SK_OT_ULONG GeometricShapesMask = SkOTSetULONGBit<45 - 32>::value; + static const SK_OT_ULONG MiscellaneousSymbolsMask = SkOTSetULONGBit<46 - 32>::value; + static const SK_OT_ULONG DingbatsMask = SkOTSetULONGBit<47 - 32>::value; + static const SK_OT_ULONG CJKSymbolsAndPunctuationMask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG HiraganaMask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG KatakanaMask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG BopomofoMask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG HangulCompatibilityJamoMask = SkOTSetULONGBit<52 - 32>::value; + static const SK_OT_ULONG PhagsPaMask = SkOTSetULONGBit<53 - 32>::value; + static const SK_OT_ULONG EnclosedCJKLettersAndMonthsMask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityMask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG HangulMask = SkOTSetULONGBit<56 - 32>::value; + static const SK_OT_ULONG NonPlane0Mask = SkOTSetULONGBit<57 - 32>::value; + static const SK_OT_ULONG PhoenicianMask = SkOTSetULONGBit<58 - 32>::value; + static const SK_OT_ULONG CJKUnifiedIdeographsMask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG PrivateUseAreaMask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG CJKCompatibilityIdeographsMask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG AlphabeticPresentationFormsMask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG ArabicPresentationFormsAMask = SkOTSetULONGBit<63 - 32>::value; + }; + struct l2 { + static const SK_OT_ULONG CombiningHalfMarksMask = SkOTSetULONGBit<64 - 64>::value; + static const SK_OT_ULONG CJKCompatibilityFormsMask = SkOTSetULONGBit<65 - 64>::value; + static const SK_OT_ULONG SmallFormVariantsMask = SkOTSetULONGBit<66 - 64>::value; + static const SK_OT_ULONG ArabicPresentationFormsBMask = SkOTSetULONGBit<67 - 64>::value; + static const SK_OT_ULONG HalfwidthAndFullwidthFormsMask = SkOTSetULONGBit<68 - 64>::value; + static const SK_OT_ULONG SpecialsMask = SkOTSetULONGBit<69 - 64>::value; + static const SK_OT_ULONG TibetanMask = SkOTSetULONGBit<70 - 64>::value; + static const SK_OT_ULONG SyriacMask = SkOTSetULONGBit<71 - 64>::value; + static const SK_OT_ULONG ThaanaMask = SkOTSetULONGBit<72 - 64>::value; + static const SK_OT_ULONG SinhalaMask = SkOTSetULONGBit<73 - 64>::value; + static const SK_OT_ULONG MyanmarMask = SkOTSetULONGBit<74 - 64>::value; + static const SK_OT_ULONG EthiopicMask = SkOTSetULONGBit<75 - 64>::value; + static const SK_OT_ULONG CherokeeMask = SkOTSetULONGBit<76 - 64>::value; + static const SK_OT_ULONG UnifiedCanadianSyllabicsMask = SkOTSetULONGBit<77 - 64>::value; + static const SK_OT_ULONG OghamMask = SkOTSetULONGBit<78 - 64>::value; + static const SK_OT_ULONG RunicMask = SkOTSetULONGBit<79 - 64>::value; + static const SK_OT_ULONG KhmerMask = SkOTSetULONGBit<80 - 64>::value; + static const SK_OT_ULONG MongolianMask = SkOTSetULONGBit<81 - 64>::value; + static const SK_OT_ULONG BrailleMask = SkOTSetULONGBit<82 - 64>::value; + static const SK_OT_ULONG YiMask = SkOTSetULONGBit<83 - 64>::value; + static const SK_OT_ULONG Tagalog_Hanunoo_Buhid_TagbanwaMask = SkOTSetULONGBit<84 - 64>::value; + static const SK_OT_ULONG OldItalicMask = SkOTSetULONGBit<85 - 64>::value; + static const SK_OT_ULONG GothicMask = SkOTSetULONGBit<86 - 64>::value; + static const SK_OT_ULONG DeseretMask = SkOTSetULONGBit<87 - 64>::value; + static const SK_OT_ULONG MusicalSymbolsMask = SkOTSetULONGBit<88 - 64>::value; + static const SK_OT_ULONG MathematicalAlphanumericSymbolsMask = SkOTSetULONGBit<89 - 64>::value; + static const SK_OT_ULONG PrivateUseMask = SkOTSetULONGBit<90 - 64>::value; + static const SK_OT_ULONG VariationSelectorsMask = SkOTSetULONGBit<91 - 64>::value; + static const SK_OT_ULONG TagsMask = SkOTSetULONGBit<92 - 64>::value; + static const SK_OT_ULONG LimbuMask = SkOTSetULONGBit<93 - 64>::value; + static const SK_OT_ULONG TaiLeMask = SkOTSetULONGBit<94 - 64>::value; + static const SK_OT_ULONG NewTaiLueMask = SkOTSetULONGBit<95 - 64>::value; + }; + struct l3 { + static const SK_OT_ULONG BugineseMask = SkOTSetULONGBit<96 - 96>::value; + static const SK_OT_ULONG GlagoliticMask = SkOTSetULONGBit<97 - 96>::value; + static const SK_OT_ULONG TifinaghMask = SkOTSetULONGBit<98 - 96>::value; + static const SK_OT_ULONG YijingHexagramSymbolsMask = SkOTSetULONGBit<99 - 96>::value; + static const SK_OT_ULONG SylotiNagriMask = SkOTSetULONGBit<100 - 96>::value; + static const SK_OT_ULONG LinearB_AegeanNumbersMask = SkOTSetULONGBit<101 - 96>::value; + static const SK_OT_ULONG AncientGreekNumbersMask = SkOTSetULONGBit<102 - 96>::value; + static const SK_OT_ULONG UgariticMask = SkOTSetULONGBit<103 - 96>::value; + static const SK_OT_ULONG OldPersianMask = SkOTSetULONGBit<104 - 96>::value; + static const SK_OT_ULONG ShavianMask = SkOTSetULONGBit<105 - 96>::value; + static const SK_OT_ULONG OsmanyaMask = SkOTSetULONGBit<106 - 96>::value; + static const SK_OT_ULONG CypriotSyllabaryMask = SkOTSetULONGBit<107 - 96>::value; + static const SK_OT_ULONG KharoshthiMask = SkOTSetULONGBit<108 - 96>::value; + static const SK_OT_ULONG TaiXuanJingSymbolsMask = SkOTSetULONGBit<109 - 96>::value; + static const SK_OT_ULONG CuneiformMask = SkOTSetULONGBit<110 - 96>::value; + static const SK_OT_ULONG CountingRodNumeralsMask = SkOTSetULONGBit<111 - 96>::value; + static const SK_OT_ULONG SundaneseMask = SkOTSetULONGBit<112 - 96>::value; + static const SK_OT_ULONG LepchaMask = SkOTSetULONGBit<113 - 96>::value; + static const SK_OT_ULONG OlChikiMask = SkOTSetULONGBit<114 - 96>::value; + static const SK_OT_ULONG SaurashtraMask = SkOTSetULONGBit<115 - 96>::value; + static const SK_OT_ULONG KayahLiMask = SkOTSetULONGBit<116 - 96>::value; + static const SK_OT_ULONG RejangMask = SkOTSetULONGBit<117 - 96>::value; + static const SK_OT_ULONG ChamMask = SkOTSetULONGBit<118 - 96>::value; + static const SK_OT_ULONG AncientSymbolsMask = SkOTSetULONGBit<119 - 96>::value; + static const SK_OT_ULONG PhaistosDiscMask = SkOTSetULONGBit<120 - 96>::value; + static const SK_OT_ULONG Carian_Lycian_LydianMask = SkOTSetULONGBit<121 - 96>::value; + static const SK_OT_ULONG DominoTiles_MahjongTilesMask = SkOTSetULONGBit<122 - 96>::value; + }; + SK_OT_ULONG value[4]; + } raw; + } ulUnicodeRange; + SK_OT_CHAR achVendID[4]; + union Selection { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + WWS, + Oblique, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Italic, + Underscore, + Negative, + Outlined, + Strikeout, + Bold, + Regular, + UseTypoMetrics) + } field; + struct Raw { + static const SK_OT_USHORT ItalicMask = SkOTSetUSHORTBit<0>::value; + static const SK_OT_USHORT UnderscoreMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT NegativeMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT OutlinedMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT StrikeoutMask = SkOTSetUSHORTBit<4>::value; + static const SK_OT_USHORT BoldMask = SkOTSetUSHORTBit<5>::value; + static const SK_OT_USHORT RegularMask = SkOTSetUSHORTBit<6>::value; + static const SK_OT_USHORT UseTypoMetricsMask = SkOTSetUSHORTBit<7>::value; + static const SK_OT_USHORT WWSMask = SkOTSetUSHORTBit<8>::value; + static const SK_OT_USHORT ObliqueMask = SkOTSetUSHORTBit<9>::value; + SK_OT_USHORT value; + } raw; + } fsSelection; + SK_OT_USHORT usFirstCharIndex; + SK_OT_USHORT usLastCharIndex; + //version0 + SK_OT_SHORT sTypoAscender; + SK_OT_SHORT sTypoDescender; + SK_OT_SHORT sTypoLineGap; + SK_OT_USHORT usWinAscent; + SK_OT_USHORT usWinDescent; + //version1 + union CodePageRange { + struct Field { + //l0 24-31 + SK_OT_BYTE_BITFIELD( + Reserved24, + Reserved25, + Reserved26, + Reserved27, + Reserved28, + MacintoshCharacterSet, + OEMCharacterSet, + SymbolCharacterSet) + //l0 16-23 + SK_OT_BYTE_BITFIELD( + Thai_874, + JISJapan_932, + ChineseSimplified_936, + KoreanWansung_949, + ChineseTraditional_950, + KoreanJohab_1361, + Reserved22, + Reserved23) + //l0 8-15 + SK_OT_BYTE_BITFIELD( + Vietnamese, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //l0 0-7 + SK_OT_BYTE_BITFIELD( + Latin1_1252, + Latin2EasternEurope_1250, + Cyrillic_1251, + Greek_1253, + Turkish_1254, + Hebrew_1255, + Arabic_1256, + WindowsBaltic_1257) + + //l1 24-31 + SK_OT_BYTE_BITFIELD( + IBMTurkish_857, + IBMCyrillic_855, + Latin2_852, + MSDOSBaltic_775, + Greek_737, + Arabic_708, + WELatin1_850, + US_437) + //l1 16-23 + SK_OT_BYTE_BITFIELD( + IBMGreek_869, + MSDOSRussian_866, + MSDOSNordic_865, + Arabic_864, + MSDOSCanadianFrench_863, + Hebrew_862, + MSDOSIcelandic_861, + MSDOSPortuguese_860) + //l1 8-15 + SK_OT_BYTE_BITFIELD( + Reserved40, + Reserved41, + Reserved42, + Reserved43, + Reserved44, + Reserved45, + Reserved46, + Reserved47) + //l1 0-7 + SK_OT_BYTE_BITFIELD( + Reserved32, + Reserved33, + Reserved34, + Reserved35, + Reserved36, + Reserved37, + Reserved38, + Reserved39) + } field; + struct Raw { + struct l0 { + static const SK_OT_ULONG Latin1_1252Mask = SkOTSetULONGBit<0>::value; + static const SK_OT_ULONG Latin2EasternEurope_1250Mask = SkOTSetULONGBit<1>::value; + static const SK_OT_ULONG Cyrillic_1251Mask = SkOTSetULONGBit<2>::value; + static const SK_OT_ULONG Greek_1253Mask = SkOTSetULONGBit<3>::value; + static const SK_OT_ULONG Turkish_1254Mask = SkOTSetULONGBit<4>::value; + static const SK_OT_ULONG Hebrew_1255Mask = SkOTSetULONGBit<5>::value; + static const SK_OT_ULONG Arabic_1256Mask = SkOTSetULONGBit<6>::value; + static const SK_OT_ULONG WindowsBaltic_1257Mask = SkOTSetULONGBit<7>::value; + static const SK_OT_ULONG Vietnamese_1258Mask = SkOTSetULONGBit<8>::value; + static const SK_OT_ULONG Thai_874Mask = SkOTSetULONGBit<16>::value; + static const SK_OT_ULONG JISJapan_932Mask = SkOTSetULONGBit<17>::value; + static const SK_OT_ULONG ChineseSimplified_936Mask = SkOTSetULONGBit<18>::value; + static const SK_OT_ULONG KoreanWansung_949Mask = SkOTSetULONGBit<19>::value; + static const SK_OT_ULONG ChineseTraditional_950Mask = SkOTSetULONGBit<20>::value; + static const SK_OT_ULONG KoreanJohab_1361Mask = SkOTSetULONGBit<21>::value; + static const SK_OT_ULONG MacintoshCharacterSetMask = SkOTSetULONGBit<29>::value; + static const SK_OT_ULONG OEMCharacterSetMask = SkOTSetULONGBit<30>::value; + static const SK_OT_ULONG SymbolCharacterSetMask = SkOTSetULONGBit<31>::value; + }; + struct l1 { + static const SK_OT_ULONG IBMGreek_869Mask = SkOTSetULONGBit<48 - 32>::value; + static const SK_OT_ULONG MSDOSRussian_866Mask = SkOTSetULONGBit<49 - 32>::value; + static const SK_OT_ULONG MSDOSNordic_865Mask = SkOTSetULONGBit<50 - 32>::value; + static const SK_OT_ULONG Arabic_864Mask = SkOTSetULONGBit<51 - 32>::value; + static const SK_OT_ULONG MSDOSCanadianFrench_863Mask = SkOTSetULONGBit<52 - 32>::value; + static const SK_OT_ULONG Hebrew_862Mask = SkOTSetULONGBit<53 - 32>::value; + static const SK_OT_ULONG MSDOSIcelandic_861Mask = SkOTSetULONGBit<54 - 32>::value; + static const SK_OT_ULONG MSDOSPortuguese_860Mask = SkOTSetULONGBit<55 - 32>::value; + static const SK_OT_ULONG IBMTurkish_857Mask = SkOTSetULONGBit<56 - 32>::value; + static const SK_OT_ULONG IBMCyrillic_855Mask = SkOTSetULONGBit<57 - 32>::value; + static const SK_OT_ULONG Latin2_852Mask = SkOTSetULONGBit<58 - 32>::value; + static const SK_OT_ULONG MSDOSBaltic_775Mask = SkOTSetULONGBit<59 - 32>::value; + static const SK_OT_ULONG Greek_737Mask = SkOTSetULONGBit<60 - 32>::value; + static const SK_OT_ULONG Arabic_708Mask = SkOTSetULONGBit<61 - 32>::value; + static const SK_OT_ULONG WELatin1_850Mask = SkOTSetULONGBit<62 - 32>::value; + static const SK_OT_ULONG US_437Mask = SkOTSetULONGBit<63 - 32>::value; + }; + SK_OT_ULONG value[2]; + } raw; + } ulCodePageRange; + //version2 + SK_OT_SHORT sxHeight; + SK_OT_SHORT sCapHeight; + SK_OT_USHORT usDefaultChar; + SK_OT_USHORT usBreakChar; + SK_OT_USHORT usMaxContext; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableOS2_V4) == 96, "sizeof_SkOTTableOS2_V4_not_96"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_VA.h b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_VA.h new file mode 100644 index 0000000000..a3bad945d8 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_OS_2_VA.h @@ -0,0 +1,141 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_OS_2_VA_DEFINED +#define SkOTTable_OS_2_VA_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkIBMFamilyClass.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkPanose.h" + +#pragma pack(push, 1) + +//Original V0 TT +struct SkOTTableOS2_VA { + SK_OT_USHORT version; + //SkOTTableOS2_VA::VERSION and SkOTTableOS2_V0::VERSION are both 0. + //The only way to differentiate these two versions is by the size of the table. + static const SK_OT_USHORT VERSION = SkTEndian_SwapBE16(0); + + SK_OT_SHORT xAvgCharWidth; + struct WeightClass { + enum Value : SK_OT_USHORT { + UltraLight = SkTEndian_SwapBE16(1), + ExtraLight = SkTEndian_SwapBE16(2), + Light = SkTEndian_SwapBE16(3), + SemiLight = SkTEndian_SwapBE16(4), + Medium = SkTEndian_SwapBE16(5), + SemiBold = SkTEndian_SwapBE16(6), + Bold = SkTEndian_SwapBE16(7), + ExtraBold = SkTEndian_SwapBE16(8), + UltraBold = SkTEndian_SwapBE16(9), + SK_SEQ_END, + } value; + } usWeightClass; + struct WidthClass { + enum Value : SK_OT_USHORT { + UltraCondensed = SkTEndian_SwapBE16(1), + ExtraCondensed = SkTEndian_SwapBE16(2), + Condensed = SkTEndian_SwapBE16(3), + SemiCondensed = SkTEndian_SwapBE16(4), + Medium = SkTEndian_SwapBE16(5), + SemiExpanded = SkTEndian_SwapBE16(6), + Expanded = SkTEndian_SwapBE16(7), + ExtraExpanded = SkTEndian_SwapBE16(8), + UltraExpanded = SkTEndian_SwapBE16(9), + SK_SEQ_END, + } value; + } usWidthClass; + union Type { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Reserved00, + Restricted, + PreviewPrint, + Editable, + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT Installable = 0; + static const SK_OT_USHORT RestrictedMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT PreviewPrintMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT EditableMask = SkOTSetUSHORTBit<3>::value; + SK_OT_USHORT value; + } raw; + } fsType; + SK_OT_SHORT ySubscriptXSize; + SK_OT_SHORT ySubscriptYSize; + SK_OT_SHORT ySubscriptXOffset; + SK_OT_SHORT ySubscriptYOffset; + SK_OT_SHORT ySuperscriptXSize; + SK_OT_SHORT ySuperscriptYSize; + SK_OT_SHORT ySuperscriptXOffset; + SK_OT_SHORT ySuperscriptYOffset; + SK_OT_SHORT yStrikeoutSize; + SK_OT_SHORT yStrikeoutPosition; + SkIBMFamilyClass sFamilyClass; + SkPanose panose; + SK_OT_ULONG ulCharRange[4]; + SK_OT_CHAR achVendID[4]; + union Selection { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Italic, + Underscore, + Negative, + Outlined, + Strikeout, + Bold, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT ItalicMask = SkOTSetUSHORTBit<0>::value; + static const SK_OT_USHORT UnderscoreMask = SkOTSetUSHORTBit<1>::value; + static const SK_OT_USHORT NegativeMask = SkOTSetUSHORTBit<2>::value; + static const SK_OT_USHORT OutlinedMask = SkOTSetUSHORTBit<3>::value; + static const SK_OT_USHORT StrikeoutMask = SkOTSetUSHORTBit<4>::value; + static const SK_OT_USHORT BoldMask = SkOTSetUSHORTBit<5>::value; + SK_OT_USHORT value; + } raw; + } fsSelection; + SK_OT_USHORT usFirstCharIndex; + SK_OT_USHORT usLastCharIndex; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableOS2_VA) == 68, "sizeof_SkOTTableOS2_VA_not_68"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_fvar.h b/gfx/skia/skia/src/sfnt/SkOTTable_fvar.h new file mode 100644 index 0000000000..913cbfb546 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_fvar.h @@ -0,0 +1,56 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_fvar_DEFINED +#define SkOTTable_fvar_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableFontVariations { + static const SK_OT_CHAR TAG0 = 'f'; + static const SK_OT_CHAR TAG1 = 'v'; + static const SK_OT_CHAR TAG2 = 'a'; + static const SK_OT_CHAR TAG3 = 'r'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_USHORT majorVersion; + SK_OT_USHORT minorVersion; + SK_OT_USHORT offsetToAxesArray; + SK_OT_USHORT reserved; + SK_OT_USHORT axisCount; + SK_OT_USHORT axisSize; // Must be 0x0014 in v1.0 + SK_OT_USHORT instanceCount; + SK_OT_USHORT instanceSize; // Must be axisCount * sizeof(Fixed) + (4 | 6) + + struct VariationAxisRecord { + SK_OT_ULONG axisTag; + SK_OT_Fixed minValue; + SK_OT_Fixed defaultValue; + SK_OT_Fixed maxValue; + SK_OT_USHORT flags; // Must be 0 + SK_OT_USHORT axisNameID; + }; // axes[axisCount]; + + template struct InstanceRecord { + SK_OT_USHORT subfamilyNameID; + SK_OT_USHORT flags; // Must be 0 + SK_OT_Fixed coordinates[AxisCount]; + SK_OT_USHORT postScriptNameID; + }; // instances[instanceCount]; +}; + +#pragma pack(pop) + + +#include +static_assert(offsetof(SkOTTableFontVariations, instanceSize) == 14, "SkOTTableFontVariations_instanceSize_not_at_14"); +static_assert(sizeof(SkOTTableFontVariations) == 16, "sizeof_SkOTTableFontVariations_not_16"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_gasp.h b/gfx/skia/skia/src/sfnt/SkOTTable_gasp.h new file mode 100644 index 0000000000..caf21e03c9 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_gasp.h @@ -0,0 +1,72 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_gasp_DEFINED +#define SkOTTable_gasp_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableGridAndScanProcedure { + static const SK_OT_CHAR TAG0 = 'g'; + static const SK_OT_CHAR TAG1 = 'a'; + static const SK_OT_CHAR TAG2 = 's'; + static const SK_OT_CHAR TAG3 = 'p'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_USHORT version; + static const SK_OT_USHORT version0 = SkTEndian_SwapBE16(0); + static const SK_OT_USHORT version1 = SkTEndian_SwapBE16(1); + + SK_OT_USHORT numRanges; + + struct GaspRange { + SK_OT_USHORT maxPPEM; + union behavior { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Gridfit, + DoGray, + SymmetricGridfit, // Version 1 + SymmetricSmoothing, // Version 1 + Reserved04, + Reserved05, + Reserved06, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT GridfitMask = SkTEndian_SwapBE16(1 << 0); + static const SK_OT_USHORT DoGrayMask = SkTEndian_SwapBE16(1 << 1); + static const SK_OT_USHORT SymmetricGridfitMask = SkTEndian_SwapBE16(1 << 2); + static const SK_OT_USHORT SymmetricSmoothingMask = SkTEndian_SwapBE16(1 << 3); + SK_OT_USHORT value; + } raw; + } flags; + }; //gaspRange[numRanges] +}; + +#pragma pack(pop) + + +#include +static_assert(offsetof(SkOTTableGridAndScanProcedure, numRanges) == 2, "SkOTTableGridAndScanProcedure_numRanges_not_at_2"); +static_assert(sizeof(SkOTTableGridAndScanProcedure) == 4, "sizeof_SkOTTableGridAndScanProcedure_not_4"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_glyf.h b/gfx/skia/skia/src/sfnt/SkOTTable_glyf.h new file mode 100644 index 0000000000..207d59bec0 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_glyf.h @@ -0,0 +1,218 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_glyf_DEFINED +#define SkOTTable_glyf_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_head.h" +#include "src/sfnt/SkOTTable_loca.h" + +#pragma pack(push, 1) + +struct SkOTTableGlyphData; + +struct SkOTTableGlyph { + static const SK_OT_CHAR TAG0 = 'g'; + static const SK_OT_CHAR TAG1 = 'l'; + static const SK_OT_CHAR TAG2 = 'y'; + static const SK_OT_CHAR TAG3 = 'f'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + class Iterator { + public: + Iterator(SkOTTableGlyph& glyf, + const SkOTTableIndexToLocation& loca, + SkOTTableHead::IndexToLocFormat locaFormat) + : fGlyf(glyf) + , fLoca(loca) + , fLocaFormat(locaFormat) + , fCurrentGlyph(0) + , fCurrentGlyphOffset(0) + { + SkASSERT(locaFormat.value == SkOTTableHead::IndexToLocFormat::ShortOffsets || + locaFormat.value == SkOTTableHead::IndexToLocFormat::LongOffsets); + } + + void advance(uint16_t num) { + fCurrentGlyph += num; + if (fLocaFormat.value == SkOTTableHead::IndexToLocFormat::ShortOffsets) { + fCurrentGlyphOffset = + SkEndian_SwapBE16(fLoca.offsets.shortOffset[fCurrentGlyph]) << 1; + } else if (fLocaFormat.value == SkOTTableHead::IndexToLocFormat::LongOffsets) { + fCurrentGlyphOffset = SkEndian_SwapBE32(fLoca.offsets.longOffset[fCurrentGlyph]); + } + } + SkOTTableGlyphData* next() { + uint32_t previousGlyphOffset = fCurrentGlyphOffset; + advance(1); + if (previousGlyphOffset == fCurrentGlyphOffset) { + return nullptr; + } else { + return reinterpret_cast( + reinterpret_cast(&fGlyf) + previousGlyphOffset + ); + } + } + private: + SkOTTableGlyph& fGlyf; + const SkOTTableIndexToLocation& fLoca; + SkOTTableHead::IndexToLocFormat fLocaFormat; + uint32_t fCurrentGlyph; + uint32_t fCurrentGlyphOffset; + }; +}; + +struct SkOTTableGlyphData { + SK_OT_SHORT numberOfContours; //== -1 Composite, > 0 Simple + SK_OT_FWORD xMin; + SK_OT_FWORD yMin; + SK_OT_FWORD xMax; + SK_OT_FWORD yMax; + + struct Simple { + SK_OT_USHORT endPtsOfContours[1/*numberOfContours*/]; + + struct Instructions { + SK_OT_USHORT length; + SK_OT_BYTE data[1/*length*/]; + }; + + union Flags { + struct Field { + SK_OT_BYTE_BITFIELD( + OnCurve, + xShortVector, + yShortVector, + Repeat, + xIsSame_xShortVectorPositive, + yIsSame_yShortVectorPositive, + Reserved6, + Reserved7) + } field; + struct Raw { + static const SK_OT_USHORT OnCurveMask = SkTEndian_SwapBE16(1 << 0); + static const SK_OT_USHORT xShortVectorMask = SkTEndian_SwapBE16(1 << 1); + static const SK_OT_USHORT yShortVectorMask = SkTEndian_SwapBE16(1 << 2); + static const SK_OT_USHORT RepeatMask = SkTEndian_SwapBE16(1 << 3); + static const SK_OT_USHORT xIsSame_xShortVectorPositiveMask = SkTEndian_SwapBE16(1 << 4); + static const SK_OT_USHORT yIsSame_yShortVectorPositiveMask = SkTEndian_SwapBE16(1 << 5); + SK_OT_BYTE value; + } raw; + }; + + //xCoordinates + //yCoordinates + }; + + struct Composite { + struct Component { + union Flags { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + WE_HAVE_INSTRUCTIONS, + USE_MY_METRICS, + OVERLAP_COMPOUND, + SCALED_COMPONENT_OFFSET, + UNSCALED_COMPONENT_OFFSET, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + ARG_1_AND_2_ARE_WORDS, + ARGS_ARE_XY_VALUES, + ROUND_XY_TO_GRID, + WE_HAVE_A_SCALE, + RESERVED, + MORE_COMPONENTS, + WE_HAVE_AN_X_AND_Y_SCALE, + WE_HAVE_A_TWO_BY_TWO) + } field; + struct Raw { + static const SK_OT_USHORT ARG_1_AND_2_ARE_WORDS_Mask = SkTEndian_SwapBE16(1 << 0); + static const SK_OT_USHORT ARGS_ARE_XY_VALUES_Mask = SkTEndian_SwapBE16(1 << 1); + static const SK_OT_USHORT ROUND_XY_TO_GRID_Mask = SkTEndian_SwapBE16(1 << 2); + static const SK_OT_USHORT WE_HAVE_A_SCALE_Mask = SkTEndian_SwapBE16(1 << 3); + static const SK_OT_USHORT RESERVED_Mask = SkTEndian_SwapBE16(1 << 4); + static const SK_OT_USHORT MORE_COMPONENTS_Mask = SkTEndian_SwapBE16(1 << 5); + static const SK_OT_USHORT WE_HAVE_AN_X_AND_Y_SCALE_Mask = SkTEndian_SwapBE16(1 << 6); + static const SK_OT_USHORT WE_HAVE_A_TWO_BY_TWO_Mask = SkTEndian_SwapBE16(1 << 7); + + static const SK_OT_USHORT WE_HAVE_INSTRUCTIONS_Mask = SkTEndian_SwapBE16(1 << 8); + static const SK_OT_USHORT USE_MY_METRICS_Mask = SkTEndian_SwapBE16(1 << 9); + static const SK_OT_USHORT OVERLAP_COMPOUND_Mask = SkTEndian_SwapBE16(1 << 10); + static const SK_OT_USHORT SCALED_COMPONENT_OFFSET_Mask = SkTEndian_SwapBE16(1 << 11); + static const SK_OT_USHORT UNSCALED_COMPONENT_OFFSET_mask = SkTEndian_SwapBE16(1 << 12); + //Reserved + //Reserved + //Reserved + SK_OT_USHORT value; + } raw; + } flags; + SK_OT_USHORT glyphIndex; + union Transform { + union Matrix { + /** !WE_HAVE_A_SCALE & !WE_HAVE_AN_X_AND_Y_SCALE & !WE_HAVE_A_TWO_BY_TWO */ + struct None { } none; + /** WE_HAVE_A_SCALE */ + struct Scale { + SK_OT_F2DOT14 a_d; + } scale; + /** WE_HAVE_AN_X_AND_Y_SCALE */ + struct ScaleXY { + SK_OT_F2DOT14 a; + SK_OT_F2DOT14 d; + } scaleXY; + /** WE_HAVE_A_TWO_BY_TWO */ + struct TwoByTwo { + SK_OT_F2DOT14 a; + SK_OT_F2DOT14 b; + SK_OT_F2DOT14 c; + SK_OT_F2DOT14 d; + } twoByTwo; + }; + /** ARG_1_AND_2_ARE_WORDS & ARGS_ARE_XY_VALUES */ + struct WordValue { + SK_OT_FWORD e; + SK_OT_FWORD f; + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix; + } wordValue; + /** !ARG_1_AND_2_ARE_WORDS & ARGS_ARE_XY_VALUES */ + struct ByteValue { + SK_OT_CHAR e; + SK_OT_CHAR f; + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix; + } byteValue; + /** ARG_1_AND_2_ARE_WORDS & !ARGS_ARE_XY_VALUES */ + struct WordIndex { + SK_OT_USHORT compoundPointIndex; + SK_OT_USHORT componentPointIndex; + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix; + } wordIndex; + /** !ARG_1_AND_2_ARE_WORDS & !ARGS_ARE_XY_VALUES */ + struct ByteIndex { + SK_OT_BYTE compoundPointIndex; + SK_OT_BYTE componentPointIndex; + SkOTTableGlyphData::Composite::Component::Transform::Matrix matrix; + } byteIndex; + } transform; + } component;//[] last element does not set MORE_COMPONENTS + + /** Comes after the last Component if the last component has WE_HAVE_INSTR. */ + struct Instructions { + SK_OT_USHORT length; + SK_OT_BYTE data[1/*length*/]; + }; + }; +}; + +#pragma pack(pop) + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_head.h b/gfx/skia/skia/src/sfnt/SkOTTable_head.h new file mode 100644 index 0000000000..d3b4ac8f45 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_head.h @@ -0,0 +1,146 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_head_DEFINED +#define SkOTTable_head_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableHead { + static const SK_OT_CHAR TAG0 = 'h'; + static const SK_OT_CHAR TAG1 = 'e'; + static const SK_OT_CHAR TAG2 = 'a'; + static const SK_OT_CHAR TAG3 = 'd'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_Fixed version; + static const SK_OT_Fixed version1 = SkTEndian_SwapBE32(0x00010000); + SK_OT_Fixed fontRevision; + static const uint32_t fontChecksum = 0xB1B0AFBA; //checksum of all TT fonts + SK_OT_ULONG checksumAdjustment; + SK_OT_ULONG magicNumber; + static const SK_OT_ULONG magicNumberConst = SkTEndian_SwapBE32(0x5F0F3CF5); + union Flags { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + GXMetamorphosis_Apple, + HasStrongRTL_Apple, + HasIndicStyleRearrangement, + AgfaMicroTypeExpressProcessed, + FontConverted, + DesignedForClearType, + LastResort, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + BaselineAtY0, + LeftSidebearingAtX0, + InstructionsDependOnPointSize, + IntegerScaling, + InstructionsAlterAdvanceWidth, + VerticalCenteredGlyphs_Apple, + Reserved06, + RequiresLayout_Apple) + } field; + struct Raw { + static const SK_OT_USHORT BaselineAtY0Mask = SkTEndian_SwapBE16(1 << 0); + static const SK_OT_USHORT LeftSidebearingAtX0Mask = SkTEndian_SwapBE16(1 << 1); + static const SK_OT_USHORT InstructionsDependOnPointSizeMask = SkTEndian_SwapBE16(1 << 2); + static const SK_OT_USHORT IntegerScalingMask = SkTEndian_SwapBE16(1 << 3); + static const SK_OT_USHORT InstructionsAlterAdvanceWidthMask = SkTEndian_SwapBE16(1 << 4); + static const SK_OT_USHORT VerticalCenteredGlyphs_AppleMask = SkTEndian_SwapBE16(1 << 5); + //Reserved + static const SK_OT_USHORT RequiresLayout_AppleMask = SkTEndian_SwapBE16(1 << 7); + + static const SK_OT_USHORT GXMetamorphosis_AppleMask = SkTEndian_SwapBE16(1 << 8); + static const SK_OT_USHORT HasStrongRTL_AppleMask = SkTEndian_SwapBE16(1 << 9); + static const SK_OT_USHORT HasIndicStyleRearrangementMask = SkTEndian_SwapBE16(1 << 10); + static const SK_OT_USHORT AgfaMicroTypeExpressProcessedMask = SkTEndian_SwapBE16(1 << 11); + static const SK_OT_USHORT FontConvertedMask = SkTEndian_SwapBE16(1 << 12); + static const SK_OT_USHORT DesignedForClearTypeMask = SkTEndian_SwapBE16(1 << 13); + static const SK_OT_USHORT LastResortMask = SkTEndian_SwapBE16(1 << 14); + //Reserved + SK_OT_USHORT value; + } raw; + } flags; + SK_OT_USHORT unitsPerEm; + SK_OT_LONGDATETIME created; + SK_OT_LONGDATETIME modified; + SK_OT_SHORT xMin; + SK_OT_SHORT yMin; + SK_OT_SHORT xMax; + SK_OT_SHORT yMax; + union MacStyle { + struct Field { + //8-15 + SK_OT_BYTE_BITFIELD( + Reserved08, + Reserved09, + Reserved10, + Reserved11, + Reserved12, + Reserved13, + Reserved14, + Reserved15) + //0-7 + SK_OT_BYTE_BITFIELD( + Bold, + Italic, + Underline, + Outline, + Shadow, + Condensed, + Extended, + Reserved07) + } field; + struct Raw { + static const SK_OT_USHORT BoldMask = SkTEndian_SwapBE16(1); + static const SK_OT_USHORT ItalicMask = SkTEndian_SwapBE16(1 << 1); + static const SK_OT_USHORT UnderlineMask = SkTEndian_SwapBE16(1 << 2); + static const SK_OT_USHORT OutlineMask = SkTEndian_SwapBE16(1 << 3); + static const SK_OT_USHORT ShadowMask = SkTEndian_SwapBE16(1 << 4); + static const SK_OT_USHORT CondensedMask = SkTEndian_SwapBE16(1 << 5); + static const SK_OT_USHORT ExtendedMask = SkTEndian_SwapBE16(1 << 6); + + SK_OT_USHORT value; + } raw; + } macStyle; + SK_OT_USHORT lowestRecPPEM; + struct FontDirectionHint { + enum Value : SK_OT_SHORT { + FullyMixedDirectionalGlyphs = SkTEndian_SwapBE16(0), + OnlyStronglyLTR = SkTEndian_SwapBE16(1), + StronglyLTR = SkTEndian_SwapBE16(2), + OnlyStronglyRTL = static_cast(SkTEndian_SwapBE16((uint16_t)-1)), + StronglyRTL = static_cast(SkTEndian_SwapBE16((uint16_t)-2)), + } value; + } fontDirectionHint; + struct IndexToLocFormat { + enum Value : SK_OT_SHORT { + ShortOffsets = SkTEndian_SwapBE16(0), + LongOffsets = SkTEndian_SwapBE16(1), + } value; + } indexToLocFormat; + struct GlyphDataFormat { + enum Value : SK_OT_SHORT { + CurrentFormat = SkTEndian_SwapBE16(0), + } value; + } glyphDataFormat; +}; + +#pragma pack(pop) + + +#include +static_assert(offsetof(SkOTTableHead, glyphDataFormat) == 52, "SkOTTableHead_glyphDataFormat_not_at_52"); +static_assert(sizeof(SkOTTableHead) == 54, "sizeof_SkOTTableHead_not_54"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_hhea.h b/gfx/skia/skia/src/sfnt/SkOTTable_hhea.h new file mode 100644 index 0000000000..83ff5933d8 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_hhea.h @@ -0,0 +1,54 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_hhea_DEFINED +#define SkOTTable_hhea_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableHorizontalHeader { + static const SK_OT_CHAR TAG0 = 'h'; + static const SK_OT_CHAR TAG1 = 'h'; + static const SK_OT_CHAR TAG2 = 'e'; + static const SK_OT_CHAR TAG3 = 'a'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_Fixed version; + static const SK_OT_Fixed version1 = SkTEndian_SwapBE32(0x00010000); + SK_OT_FWORD Ascender; + SK_OT_FWORD Descender; + SK_OT_FWORD LineGap; + SK_OT_UFWORD advanceWidthMax; + SK_OT_FWORD minLeftSideBearing; + SK_OT_FWORD minRightSideBearing; + SK_OT_FWORD xMaxExtent; + SK_OT_SHORT caretSlopeRise; + SK_OT_SHORT caretSlopeRun; + SK_OT_SHORT caretOffset; + SK_OT_SHORT Reserved24; + SK_OT_SHORT Reserved26; + SK_OT_SHORT Reserved28; + SK_OT_SHORT Reserved30; + struct MetricDataFormat { + enum Value : SK_OT_SHORT { + CurrentFormat = SkTEndian_SwapBE16(0), + } value; + } metricDataFormat; + SK_OT_USHORT numberOfHMetrics; +}; + +#pragma pack(pop) + + +#include +static_assert(offsetof(SkOTTableHorizontalHeader, numberOfHMetrics) == 34, "SkOTTableHorizontalHeader_numberOfHMetrics_not_at_34"); +static_assert(sizeof(SkOTTableHorizontalHeader) == 36, "sizeof_SkOTTableHorizontalHeader_not_36"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_hmtx.h b/gfx/skia/skia/src/sfnt/SkOTTable_hmtx.h new file mode 100644 index 0000000000..45aaa8870c --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_hmtx.h @@ -0,0 +1,34 @@ +/* + * Copyright 2022 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_hmtx_DEFINED +#define SkOTTable_hmtx_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableHorizontalMetrics { + static const SK_OT_CHAR TAG0 = 'h'; + static const SK_OT_CHAR TAG1 = 'm'; + static const SK_OT_CHAR TAG2 = 't'; + static const SK_OT_CHAR TAG3 = 'x'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + struct FullMetric { + SK_OT_USHORT advanceWidth; + SK_OT_SHORT lsb; + } longHorMetric[1/*hhea::numberOfHMetrics*/]; + struct ShortMetric { + SK_OT_SHORT lsb; + }; /* maxp::numGlyphs - hhea::numberOfHMetrics */ +}; + +#pragma pack(pop) + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_loca.h b/gfx/skia/skia/src/sfnt/SkOTTable_loca.h new file mode 100644 index 0000000000..4ce345f7eb --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_loca.h @@ -0,0 +1,31 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_loca_DEFINED +#define SkOTTable_loca_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableIndexToLocation { + static const SK_OT_CHAR TAG0 = 'l'; + static const SK_OT_CHAR TAG1 = 'o'; + static const SK_OT_CHAR TAG2 = 'c'; + static const SK_OT_CHAR TAG3 = 'a'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + union Offsets { + SK_OT_USHORT shortOffset[1]; + SK_OT_ULONG longOffset[1]; + } offsets; +}; + +#pragma pack(pop) + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_maxp.h b/gfx/skia/skia/src/sfnt/SkOTTable_maxp.h new file mode 100644 index 0000000000..aaae28a9e3 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_maxp.h @@ -0,0 +1,34 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_maxp_DEFINED +#define SkOTTable_maxp_DEFINED + +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_maxp_CFF.h" +#include "src/sfnt/SkOTTable_maxp_TT.h" + +#pragma pack(push, 1) + +struct SkOTTableMaximumProfile { + static const SK_OT_CHAR TAG0 = 'm'; + static const SK_OT_CHAR TAG1 = 'a'; + static const SK_OT_CHAR TAG2 = 'x'; + static const SK_OT_CHAR TAG3 = 'p'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + union Version { + SK_OT_Fixed version; + + struct CFF : SkOTTableMaximumProfile_CFF { } cff; + struct TT : SkOTTableMaximumProfile_TT { } tt; + } version; +}; + +#pragma pack(pop) + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_maxp_CFF.h b/gfx/skia/skia/src/sfnt/SkOTTable_maxp_CFF.h new file mode 100644 index 0000000000..5f6608d692 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_maxp_CFF.h @@ -0,0 +1,30 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_maxp_CFF_DEFINED +#define SkOTTable_maxp_CFF_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableMaximumProfile_CFF { + SK_OT_Fixed version; + static const SK_OT_Fixed VERSION = SkTEndian_SwapBE32(0x00005000); + + SK_OT_USHORT numGlyphs; +}; + +#pragma pack(pop) + + +#include +static_assert(offsetof(SkOTTableMaximumProfile_CFF, numGlyphs) == 4, "SkOTTableMaximumProfile_CFF_numGlyphs_not_at_4"); +static_assert(sizeof(SkOTTableMaximumProfile_CFF) == 6, "sizeof_SkOTTableMaximumProfile_CFF_not_6"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_maxp_TT.h b/gfx/skia/skia/src/sfnt/SkOTTable_maxp_TT.h new file mode 100644 index 0000000000..fb8fb3692a --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_maxp_TT.h @@ -0,0 +1,48 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_maxp_TT_DEFINED +#define SkOTTable_maxp_TT_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableMaximumProfile_TT { + SK_OT_Fixed version; + static const SK_OT_Fixed VERSION = SkTEndian_SwapBE32(0x00010000); + + SK_OT_USHORT numGlyphs; + SK_OT_USHORT maxPoints; + SK_OT_USHORT maxContours; + SK_OT_USHORT maxCompositePoints; + SK_OT_USHORT maxCompositeContours; + struct MaxZones { + enum Value : SK_OT_USHORT { + DoesNotUseTwilightZone = SkTEndian_SwapBE16(1), + UsesTwilightZone = SkTEndian_SwapBE16(2), + } value; + } maxZones; + SK_OT_USHORT maxTwilightPoints; + SK_OT_USHORT maxStorage; + SK_OT_USHORT maxFunctionDefs; + SK_OT_USHORT maxInstructionDefs; + SK_OT_USHORT maxStackElements; + SK_OT_USHORT maxSizeOfInstructions; + SK_OT_USHORT maxComponentElements; + SK_OT_USHORT maxComponentDepth; +}; + +#pragma pack(pop) + + +#include +static_assert(offsetof(SkOTTableMaximumProfile_TT, maxComponentDepth) == 30, "SkOTTableMaximumProfile_TT_maxComponentDepth_not_at_30"); +static_assert(sizeof(SkOTTableMaximumProfile_TT) == 32, "sizeof_SkOTTableMaximumProfile_TT_not_32"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_name.cpp b/gfx/skia/skia/src/sfnt/SkOTTable_name.cpp new file mode 100644 index 0000000000..b422f74280 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_name.cpp @@ -0,0 +1,586 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sfnt/SkOTTable_name.h" + +#include "src/base/SkEndian.h" +#include "src/base/SkTSearch.h" +#include "src/base/SkUTF.h" +#include "src/core/SkStringUtils.h" + +static SkUnichar next_unichar_UTF16BE(const uint8_t** srcPtr, size_t* length) { + SkASSERT(srcPtr && *srcPtr && length); + SkASSERT(*length > 0); + + uint16_t leading; + if (*length < sizeof(leading)) { + *length = 0; + return 0xFFFD; + } + memcpy(&leading, *srcPtr, sizeof(leading)); + *srcPtr += sizeof(leading); + *length -= sizeof(leading); + SkUnichar c = SkEndian_SwapBE16(leading); + + if (SkUTF::IsTrailingSurrogateUTF16(c)) { + return 0xFFFD; + } + if (SkUTF::IsLeadingSurrogateUTF16(c)) { + uint16_t trailing; + if (*length < sizeof(trailing)) { + *length = 0; + return 0xFFFD; + } + memcpy(&trailing, *srcPtr, sizeof(trailing)); + SkUnichar c2 = SkEndian_SwapBE16(trailing); + if (!SkUTF::IsTrailingSurrogateUTF16(c2)) { + return 0xFFFD; + } + *srcPtr += sizeof(trailing); + *length -= sizeof(trailing); + + c = (c << 10) + c2 + (0x10000 - (0xD800 << 10) - 0xDC00); + } + return c; +} + +static void SkString_from_UTF16BE(const uint8_t* utf16be, size_t length, SkString& utf8) { + // Note that utf16be may not be 2-byte aligned. + SkASSERT(utf16be != nullptr); + + utf8.reset(); + while (length) { + utf8.appendUnichar(next_unichar_UTF16BE(&utf16be, &length)); + } +} + +/** UnicodeFromMacRoman[macRomanPoint - 0x80] -> unicodeCodePoint. + * Derived from http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/ROMAN.TXT . + * In MacRoman the first 128 code points match ASCII code points. + * This maps the second 128 MacRoman code points to unicode code points. + */ +static const uint16_t UnicodeFromMacRoman[0x80] = { + 0x00C4, 0x00C5, 0x00C7, 0x00C9, 0x00D1, 0x00D6, 0x00DC, 0x00E1, + 0x00E0, 0x00E2, 0x00E4, 0x00E3, 0x00E5, 0x00E7, 0x00E9, 0x00E8, + 0x00EA, 0x00EB, 0x00ED, 0x00EC, 0x00EE, 0x00EF, 0x00F1, 0x00F3, + 0x00F2, 0x00F4, 0x00F6, 0x00F5, 0x00FA, 0x00F9, 0x00FB, 0x00FC, + 0x2020, 0x00B0, 0x00A2, 0x00A3, 0x00A7, 0x2022, 0x00B6, 0x00DF, + 0x00AE, 0x00A9, 0x2122, 0x00B4, 0x00A8, 0x2260, 0x00C6, 0x00D8, + 0x221E, 0x00B1, 0x2264, 0x2265, 0x00A5, 0x00B5, 0x2202, 0x2211, + 0x220F, 0x03C0, 0x222B, 0x00AA, 0x00BA, 0x03A9, 0x00E6, 0x00F8, + 0x00BF, 0x00A1, 0x00AC, 0x221A, 0x0192, 0x2248, 0x2206, 0x00AB, + 0x00BB, 0x2026, 0x00A0, 0x00C0, 0x00C3, 0x00D5, 0x0152, 0x0153, + 0x2013, 0x2014, 0x201C, 0x201D, 0x2018, 0x2019, 0x00F7, 0x25CA, + 0x00FF, 0x0178, 0x2044, 0x20AC, 0x2039, 0x203A, 0xFB01, 0xFB02, + 0x2021, 0x00B7, 0x201A, 0x201E, 0x2030, 0x00C2, 0x00CA, 0x00C1, + 0x00CB, 0x00C8, 0x00CD, 0x00CE, 0x00CF, 0x00CC, 0x00D3, 0x00D4, + 0xF8FF, 0x00D2, 0x00DA, 0x00DB, 0x00D9, 0x0131, 0x02C6, 0x02DC, + 0x00AF, 0x02D8, 0x02D9, 0x02DA, 0x00B8, 0x02DD, 0x02DB, 0x02C7, +}; + +static void SkStringFromMacRoman(const uint8_t* macRoman, size_t length, SkString& utf8) { + utf8.reset(); + for (size_t i = 0; i < length; ++i) { + utf8.appendUnichar(macRoman[i] < 0x80 ? macRoman[i] + : UnicodeFromMacRoman[macRoman[i] - 0x80]); + } +} + +static const struct BCP47FromLanguageId { + uint16_t languageID; + const char* bcp47; +} +/** The Mac and Windows values do not conflict, so this is currently one single table. */ +BCP47FromLanguageID[] = { + /** A mapping from Mac Language Designators to BCP 47 codes. + * The following list was constructed more or less manually. + * Apple now uses BCP 47 (post OSX10.4), so there will be no new entries. + */ + {0, "en"}, //English + {1, "fr"}, //French + {2, "de"}, //German + {3, "it"}, //Italian + {4, "nl"}, //Dutch + {5, "sv"}, //Swedish + {6, "es"}, //Spanish + {7, "da"}, //Danish + {8, "pt"}, //Portuguese + {9, "nb"}, //Norwegian + {10, "he"}, //Hebrew + {11, "ja"}, //Japanese + {12, "ar"}, //Arabic + {13, "fi"}, //Finnish + {14, "el"}, //Greek + {15, "is"}, //Icelandic + {16, "mt"}, //Maltese + {17, "tr"}, //Turkish + {18, "hr"}, //Croatian + {19, "zh-Hant"}, //Chinese (Traditional) + {20, "ur"}, //Urdu + {21, "hi"}, //Hindi + {22, "th"}, //Thai + {23, "ko"}, //Korean + {24, "lt"}, //Lithuanian + {25, "pl"}, //Polish + {26, "hu"}, //Hungarian + {27, "et"}, //Estonian + {28, "lv"}, //Latvian + {29, "se"}, //Sami + {30, "fo"}, //Faroese + {31, "fa"}, //Farsi (Persian) + {32, "ru"}, //Russian + {33, "zh-Hans"}, //Chinese (Simplified) + {34, "nl"}, //Dutch + {35, "ga"}, //Irish(Gaelic) + {36, "sq"}, //Albanian + {37, "ro"}, //Romanian + {38, "cs"}, //Czech + {39, "sk"}, //Slovak + {40, "sl"}, //Slovenian + {41, "yi"}, //Yiddish + {42, "sr"}, //Serbian + {43, "mk"}, //Macedonian + {44, "bg"}, //Bulgarian + {45, "uk"}, //Ukrainian + {46, "be"}, //Byelorussian + {47, "uz"}, //Uzbek + {48, "kk"}, //Kazakh + {49, "az-Cyrl"}, //Azerbaijani (Cyrillic) + {50, "az-Arab"}, //Azerbaijani (Arabic) + {51, "hy"}, //Armenian + {52, "ka"}, //Georgian + {53, "mo"}, //Moldavian + {54, "ky"}, //Kirghiz + {55, "tg"}, //Tajiki + {56, "tk"}, //Turkmen + {57, "mn-Mong"}, //Mongolian (Traditional) + {58, "mn-Cyrl"}, //Mongolian (Cyrillic) + {59, "ps"}, //Pashto + {60, "ku"}, //Kurdish + {61, "ks"}, //Kashmiri + {62, "sd"}, //Sindhi + {63, "bo"}, //Tibetan + {64, "ne"}, //Nepali + {65, "sa"}, //Sanskrit + {66, "mr"}, //Marathi + {67, "bn"}, //Bengali + {68, "as"}, //Assamese + {69, "gu"}, //Gujarati + {70, "pa"}, //Punjabi + {71, "or"}, //Oriya + {72, "ml"}, //Malayalam + {73, "kn"}, //Kannada + {74, "ta"}, //Tamil + {75, "te"}, //Telugu + {76, "si"}, //Sinhalese + {77, "my"}, //Burmese + {78, "km"}, //Khmer + {79, "lo"}, //Lao + {80, "vi"}, //Vietnamese + {81, "id"}, //Indonesian + {82, "tl"}, //Tagalog + {83, "ms-Latn"}, //Malay (Roman) + {84, "ms-Arab"}, //Malay (Arabic) + {85, "am"}, //Amharic + {86, "ti"}, //Tigrinya + {87, "om"}, //Oromo + {88, "so"}, //Somali + {89, "sw"}, //Swahili + {90, "rw"}, //Kinyarwanda/Ruanda + {91, "rn"}, //Rundi + {92, "ny"}, //Nyanja/Chewa + {93, "mg"}, //Malagasy + {94, "eo"}, //Esperanto + {128, "cy"}, //Welsh + {129, "eu"}, //Basque + {130, "ca"}, //Catalan + {131, "la"}, //Latin + {132, "qu"}, //Quechua + {133, "gn"}, //Guarani + {134, "ay"}, //Aymara + {135, "tt"}, //Tatar + {136, "ug"}, //Uighur + {137, "dz"}, //Dzongkha + {138, "jv-Latn"}, //Javanese (Roman) + {139, "su-Latn"}, //Sundanese (Roman) + {140, "gl"}, //Galician + {141, "af"}, //Afrikaans + {142, "br"}, //Breton + {143, "iu"}, //Inuktitut + {144, "gd"}, //Scottish (Gaelic) + {145, "gv"}, //Manx (Gaelic) + {146, "ga"}, //Irish (Gaelic with Lenition) + {147, "to"}, //Tongan + {148, "el"}, //Greek (Polytonic) Note: ISO 15924 does not have an equivalent script name. + {149, "kl"}, //Greenlandic + {150, "az-Latn"}, //Azerbaijani (Roman) + {151, "nn"}, //Nynorsk + + /** A mapping from Windows LCID to BCP 47 codes. + * This list is the sorted, curated output of tools/win_lcid.cpp. + * Note that these are sorted by value for quick binary lookup, and not logically by lsb. + * The 'bare' language ids (e.g. 0x0001 for Arabic) are ommitted + * as they do not appear as valid language ids in the OpenType specification. + */ + { 0x0401, "ar-SA" }, //Arabic + { 0x0402, "bg-BG" }, //Bulgarian + { 0x0403, "ca-ES" }, //Catalan + { 0x0404, "zh-TW" }, //Chinese (Traditional) + { 0x0405, "cs-CZ" }, //Czech + { 0x0406, "da-DK" }, //Danish + { 0x0407, "de-DE" }, //German + { 0x0408, "el-GR" }, //Greek + { 0x0409, "en-US" }, //English + { 0x040a, "es-ES_tradnl" }, //Spanish + { 0x040b, "fi-FI" }, //Finnish + { 0x040c, "fr-FR" }, //French + { 0x040d, "he-IL" }, //Hebrew + { 0x040d, "he" }, //Hebrew + { 0x040e, "hu-HU" }, //Hungarian + { 0x040e, "hu" }, //Hungarian + { 0x040f, "is-IS" }, //Icelandic + { 0x0410, "it-IT" }, //Italian + { 0x0411, "ja-JP" }, //Japanese + { 0x0412, "ko-KR" }, //Korean + { 0x0413, "nl-NL" }, //Dutch + { 0x0414, "nb-NO" }, //Norwegian (Bokmål) + { 0x0415, "pl-PL" }, //Polish + { 0x0416, "pt-BR" }, //Portuguese + { 0x0417, "rm-CH" }, //Romansh + { 0x0418, "ro-RO" }, //Romanian + { 0x0419, "ru-RU" }, //Russian + { 0x041a, "hr-HR" }, //Croatian + { 0x041b, "sk-SK" }, //Slovak + { 0x041c, "sq-AL" }, //Albanian + { 0x041d, "sv-SE" }, //Swedish + { 0x041e, "th-TH" }, //Thai + { 0x041f, "tr-TR" }, //Turkish + { 0x0420, "ur-PK" }, //Urdu + { 0x0421, "id-ID" }, //Indonesian + { 0x0422, "uk-UA" }, //Ukrainian + { 0x0423, "be-BY" }, //Belarusian + { 0x0424, "sl-SI" }, //Slovenian + { 0x0425, "et-EE" }, //Estonian + { 0x0426, "lv-LV" }, //Latvian + { 0x0427, "lt-LT" }, //Lithuanian + { 0x0428, "tg-Cyrl-TJ" }, //Tajik (Cyrillic) + { 0x0429, "fa-IR" }, //Persian + { 0x042a, "vi-VN" }, //Vietnamese + { 0x042b, "hy-AM" }, //Armenian + { 0x042c, "az-Latn-AZ" }, //Azeri (Latin) + { 0x042d, "eu-ES" }, //Basque + { 0x042e, "hsb-DE" }, //Upper Sorbian + { 0x042f, "mk-MK" }, //Macedonian (FYROM) + { 0x0432, "tn-ZA" }, //Setswana + { 0x0434, "xh-ZA" }, //isiXhosa + { 0x0435, "zu-ZA" }, //isiZulu + { 0x0436, "af-ZA" }, //Afrikaans + { 0x0437, "ka-GE" }, //Georgian + { 0x0438, "fo-FO" }, //Faroese + { 0x0439, "hi-IN" }, //Hindi + { 0x043a, "mt-MT" }, //Maltese + { 0x043b, "se-NO" }, //Sami (Northern) + { 0x043e, "ms-MY" }, //Malay + { 0x043f, "kk-KZ" }, //Kazakh + { 0x0440, "ky-KG" }, //Kyrgyz + { 0x0441, "sw-KE" }, //Kiswahili + { 0x0442, "tk-TM" }, //Turkmen + { 0x0443, "uz-Latn-UZ" }, //Uzbek (Latin) + { 0x0443, "uz" }, //Uzbek + { 0x0444, "tt-RU" }, //Tatar + { 0x0445, "bn-IN" }, //Bengali + { 0x0446, "pa-IN" }, //Punjabi + { 0x0447, "gu-IN" }, //Gujarati + { 0x0448, "or-IN" }, //Oriya + { 0x0449, "ta-IN" }, //Tamil + { 0x044a, "te-IN" }, //Telugu + { 0x044b, "kn-IN" }, //Kannada + { 0x044c, "ml-IN" }, //Malayalam + { 0x044d, "as-IN" }, //Assamese + { 0x044e, "mr-IN" }, //Marathi + { 0x044f, "sa-IN" }, //Sanskrit + { 0x0450, "mn-Cyrl" }, //Mongolian (Cyrillic) + { 0x0451, "bo-CN" }, //Tibetan + { 0x0452, "cy-GB" }, //Welsh + { 0x0453, "km-KH" }, //Khmer + { 0x0454, "lo-LA" }, //Lao + { 0x0456, "gl-ES" }, //Galician + { 0x0457, "kok-IN" }, //Konkani + { 0x045a, "syr-SY" }, //Syriac + { 0x045b, "si-LK" }, //Sinhala + { 0x045d, "iu-Cans-CA" }, //Inuktitut (Syllabics) + { 0x045e, "am-ET" }, //Amharic + { 0x0461, "ne-NP" }, //Nepali + { 0x0462, "fy-NL" }, //Frisian + { 0x0463, "ps-AF" }, //Pashto + { 0x0464, "fil-PH" }, //Filipino + { 0x0465, "dv-MV" }, //Divehi + { 0x0468, "ha-Latn-NG" }, //Hausa (Latin) + { 0x046a, "yo-NG" }, //Yoruba + { 0x046b, "quz-BO" }, //Quechua + { 0x046c, "nso-ZA" }, //Sesotho sa Leboa + { 0x046d, "ba-RU" }, //Bashkir + { 0x046e, "lb-LU" }, //Luxembourgish + { 0x046f, "kl-GL" }, //Greenlandic + { 0x0470, "ig-NG" }, //Igbo + { 0x0478, "ii-CN" }, //Yi + { 0x047a, "arn-CL" }, //Mapudungun + { 0x047c, "moh-CA" }, //Mohawk + { 0x047e, "br-FR" }, //Breton + { 0x0480, "ug-CN" }, //Uyghur + { 0x0481, "mi-NZ" }, //Maori + { 0x0482, "oc-FR" }, //Occitan + { 0x0483, "co-FR" }, //Corsican + { 0x0484, "gsw-FR" }, //Alsatian + { 0x0485, "sah-RU" }, //Yakut + { 0x0486, "qut-GT" }, //K'iche + { 0x0487, "rw-RW" }, //Kinyarwanda + { 0x0488, "wo-SN" }, //Wolof + { 0x048c, "prs-AF" }, //Dari + { 0x0491, "gd-GB" }, //Scottish Gaelic + { 0x0801, "ar-IQ" }, //Arabic + { 0x0804, "zh-Hans" }, //Chinese (Simplified) + { 0x0807, "de-CH" }, //German + { 0x0809, "en-GB" }, //English + { 0x080a, "es-MX" }, //Spanish + { 0x080c, "fr-BE" }, //French + { 0x0810, "it-CH" }, //Italian + { 0x0813, "nl-BE" }, //Dutch + { 0x0814, "nn-NO" }, //Norwegian (Nynorsk) + { 0x0816, "pt-PT" }, //Portuguese + { 0x081a, "sr-Latn-CS" }, //Serbian (Latin) + { 0x081d, "sv-FI" }, //Swedish + { 0x082c, "az-Cyrl-AZ" }, //Azeri (Cyrillic) + { 0x082e, "dsb-DE" }, //Lower Sorbian + { 0x082e, "dsb" }, //Lower Sorbian + { 0x083b, "se-SE" }, //Sami (Northern) + { 0x083c, "ga-IE" }, //Irish + { 0x083e, "ms-BN" }, //Malay + { 0x0843, "uz-Cyrl-UZ" }, //Uzbek (Cyrillic) + { 0x0845, "bn-BD" }, //Bengali + { 0x0850, "mn-Mong-CN" }, //Mongolian (Traditional Mongolian) + { 0x085d, "iu-Latn-CA" }, //Inuktitut (Latin) + { 0x085f, "tzm-Latn-DZ" }, //Tamazight (Latin) + { 0x086b, "quz-EC" }, //Quechua + { 0x0c01, "ar-EG" }, //Arabic + { 0x0c04, "zh-Hant" }, //Chinese (Traditional) + { 0x0c07, "de-AT" }, //German + { 0x0c09, "en-AU" }, //English + { 0x0c0a, "es-ES" }, //Spanish + { 0x0c0c, "fr-CA" }, //French + { 0x0c1a, "sr-Cyrl-CS" }, //Serbian (Cyrillic) + { 0x0c3b, "se-FI" }, //Sami (Northern) + { 0x0c6b, "quz-PE" }, //Quechua + { 0x1001, "ar-LY" }, //Arabic + { 0x1004, "zh-SG" }, //Chinese (Simplified) + { 0x1007, "de-LU" }, //German + { 0x1009, "en-CA" }, //English + { 0x100a, "es-GT" }, //Spanish + { 0x100c, "fr-CH" }, //French + { 0x101a, "hr-BA" }, //Croatian (Latin) + { 0x103b, "smj-NO" }, //Sami (Lule) + { 0x1401, "ar-DZ" }, //Arabic + { 0x1404, "zh-MO" }, //Chinese (Traditional) + { 0x1407, "de-LI" }, //German + { 0x1409, "en-NZ" }, //English + { 0x140a, "es-CR" }, //Spanish + { 0x140c, "fr-LU" }, //French + { 0x141a, "bs-Latn-BA" }, //Bosnian (Latin) + { 0x141a, "bs" }, //Bosnian + { 0x143b, "smj-SE" }, //Sami (Lule) + { 0x143b, "smj" }, //Sami (Lule) + { 0x1801, "ar-MA" }, //Arabic + { 0x1809, "en-IE" }, //English + { 0x180a, "es-PA" }, //Spanish + { 0x180c, "fr-MC" }, //French + { 0x181a, "sr-Latn-BA" }, //Serbian (Latin) + { 0x183b, "sma-NO" }, //Sami (Southern) + { 0x1c01, "ar-TN" }, //Arabic + { 0x1c09, "en-ZA" }, //English + { 0x1c0a, "es-DO" }, //Spanish + { 0x1c1a, "sr-Cyrl-BA" }, //Serbian (Cyrillic) + { 0x1c3b, "sma-SE" }, //Sami (Southern) + { 0x1c3b, "sma" }, //Sami (Southern) + { 0x2001, "ar-OM" }, //Arabic + { 0x2009, "en-JM" }, //English + { 0x200a, "es-VE" }, //Spanish + { 0x201a, "bs-Cyrl-BA" }, //Bosnian (Cyrillic) + { 0x201a, "bs-Cyrl" }, //Bosnian (Cyrillic) + { 0x203b, "sms-FI" }, //Sami (Skolt) + { 0x203b, "sms" }, //Sami (Skolt) + { 0x2401, "ar-YE" }, //Arabic + { 0x2409, "en-029" }, //English + { 0x240a, "es-CO" }, //Spanish + { 0x241a, "sr-Latn-RS" }, //Serbian (Latin) + { 0x243b, "smn-FI" }, //Sami (Inari) + { 0x2801, "ar-SY" }, //Arabic + { 0x2809, "en-BZ" }, //English + { 0x280a, "es-PE" }, //Spanish + { 0x281a, "sr-Cyrl-RS" }, //Serbian (Cyrillic) + { 0x2c01, "ar-JO" }, //Arabic + { 0x2c09, "en-TT" }, //English + { 0x2c0a, "es-AR" }, //Spanish + { 0x2c1a, "sr-Latn-ME" }, //Serbian (Latin) + { 0x3001, "ar-LB" }, //Arabic + { 0x3009, "en-ZW" }, //English + { 0x300a, "es-EC" }, //Spanish + { 0x301a, "sr-Cyrl-ME" }, //Serbian (Cyrillic) + { 0x3401, "ar-KW" }, //Arabic + { 0x3409, "en-PH" }, //English + { 0x340a, "es-CL" }, //Spanish + { 0x3801, "ar-AE" }, //Arabic + { 0x380a, "es-UY" }, //Spanish + { 0x3c01, "ar-BH" }, //Arabic + { 0x3c0a, "es-PY" }, //Spanish + { 0x4001, "ar-QA" }, //Arabic + { 0x4009, "en-IN" }, //English + { 0x400a, "es-BO" }, //Spanish + { 0x4409, "en-MY" }, //English + { 0x440a, "es-SV" }, //Spanish + { 0x4809, "en-SG" }, //English + { 0x480a, "es-HN" }, //Spanish + { 0x4c0a, "es-NI" }, //Spanish + { 0x500a, "es-PR" }, //Spanish + { 0x540a, "es-US" }, //Spanish +}; + +namespace { +bool BCP47FromLanguageIdLess(const BCP47FromLanguageId& a, const BCP47FromLanguageId& b) { + return a.languageID < b.languageID; +} +} // namespace + +bool SkOTTableName::Iterator::next(SkOTTableName::Iterator::Record& record) { + SkOTTableName nameTable; + if (fNameTableSize < sizeof(nameTable)) { + return false; + } + memcpy(&nameTable, fNameTable, sizeof(nameTable)); + + const uint8_t* nameRecords = fNameTable + sizeof(nameTable); + const size_t nameRecordsSize = fNameTableSize - sizeof(nameTable); + + const size_t stringTableOffset = SkEndian_SwapBE16(nameTable.stringOffset); + if (fNameTableSize < stringTableOffset) { + return false; + } + const uint8_t* stringTable = fNameTable + stringTableOffset; + const size_t stringTableSize = fNameTableSize - stringTableOffset; + + // Find the next record which matches the requested type. + SkOTTableName::Record nameRecord; + const size_t nameRecordsCount = SkEndian_SwapBE16(nameTable.count); + const size_t nameRecordsMax = std::min(nameRecordsCount, nameRecordsSize / sizeof(nameRecord)); + do { + if (fIndex >= nameRecordsMax) { + return false; + } + + memcpy(&nameRecord, nameRecords + sizeof(nameRecord)*fIndex, sizeof(nameRecord)); + ++fIndex; + } while (fType != -1 && nameRecord.nameID.fontSpecific != fType); + + record.type = nameRecord.nameID.fontSpecific; + + // Decode the name into UTF-8. + const size_t nameOffset = SkEndian_SwapBE16(nameRecord.offset); + const size_t nameLength = SkEndian_SwapBE16(nameRecord.length); + if (stringTableSize < nameOffset + nameLength) { + return false; // continue? + } + const uint8_t* nameString = stringTable + nameOffset; + switch (nameRecord.platformID.value) { + case SkOTTableName::Record::PlatformID::Windows: + if (SkOTTableName::Record::EncodingID::Windows::UnicodeBMPUCS2 + != nameRecord.encodingID.windows.value + && SkOTTableName::Record::EncodingID::Windows::UnicodeUCS4 + != nameRecord.encodingID.windows.value + && SkOTTableName::Record::EncodingID::Windows::Symbol + != nameRecord.encodingID.windows.value) + { + record.name.reset(); + break; // continue? + } + [[fallthrough]]; + case SkOTTableName::Record::PlatformID::Unicode: + case SkOTTableName::Record::PlatformID::ISO: + SkString_from_UTF16BE(nameString, nameLength, record.name); + break; + + case SkOTTableName::Record::PlatformID::Macintosh: + // TODO: need better decoding, especially on Mac. + if (SkOTTableName::Record::EncodingID::Macintosh::Roman + != nameRecord.encodingID.macintosh.value) + { + record.name.reset(); + break; // continue? + } + SkStringFromMacRoman(nameString, nameLength, record.name); + break; + + case SkOTTableName::Record::PlatformID::Custom: + // These should never appear in a 'name' table. + default: + SkASSERT(false); + record.name.reset(); + break; // continue? + } + + // Determine the language. + const uint16_t languageID = SkEndian_SwapBE16(nameRecord.languageID.languageTagID); + + // Handle format 1 languages. + if (SkOTTableName::format_1 == nameTable.format && languageID >= 0x8000) { + const uint16_t languageTagRecordIndex = languageID - 0x8000; + + if (nameRecordsSize < sizeof(nameRecord)*nameRecordsCount) { + return false; //"und" or break? + } + const uint8_t* format1extData = nameRecords + sizeof(nameRecord)*nameRecordsCount; + size_t format1extSize = nameRecordsSize - sizeof(nameRecord)*nameRecordsCount; + SkOTTableName::Format1Ext format1ext; + if (format1extSize < sizeof(format1ext)) { + return false; // "und" or break? + } + memcpy(&format1ext, format1extData, sizeof(format1ext)); + + const uint8_t* languageTagRecords = format1extData + sizeof(format1ext); + size_t languageTagRecordsSize = format1extSize - sizeof(format1ext); + if (languageTagRecordIndex < SkEndian_SwapBE16(format1ext.langTagCount)) { + SkOTTableName::Format1Ext::LangTagRecord languageTagRecord; + if (languageTagRecordsSize < sizeof(languageTagRecord)*(languageTagRecordIndex+1)) { + return false; // "und"? + } + const uint8_t* languageTagData = languageTagRecords + + sizeof(languageTagRecord)*languageTagRecordIndex; + memcpy(&languageTagRecord, languageTagData, sizeof(languageTagRecord)); + + uint16_t languageOffset = SkEndian_SwapBE16(languageTagRecord.offset); + uint16_t languageLength = SkEndian_SwapBE16(languageTagRecord.length); + + if (fNameTableSize < stringTableOffset + languageOffset + languageLength) { + return false; // "und"? + } + const uint8_t* languageString = stringTable + languageOffset; + SkString_from_UTF16BE(languageString, languageLength, record.language); + return true; + } + } + + // Handle format 0 languages, translating them into BCP 47. + const BCP47FromLanguageId target = { languageID, "" }; + int languageIndex = SkTSearch( + BCP47FromLanguageID, std::size(BCP47FromLanguageID), target, sizeof(target)); + if (languageIndex >= 0) { + record.language = BCP47FromLanguageID[languageIndex].bcp47; + return true; + } + + // Unknown language, return the BCP 47 code 'und' for 'undetermined'. + record.language = "und"; + return true; +} diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_name.h b/gfx/skia/skia/src/sfnt/SkOTTable_name.h new file mode 100644 index 0000000000..271100e2cf --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_name.h @@ -0,0 +1,577 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_name_DEFINED +#define SkOTTable_name_DEFINED + +#include "include/core/SkString.h" +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTableName { + static const SK_OT_CHAR TAG0 = 'n'; + static const SK_OT_CHAR TAG1 = 'a'; + static const SK_OT_CHAR TAG2 = 'm'; + static const SK_OT_CHAR TAG3 = 'e'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_USHORT format; + static const SK_OT_USHORT format_0 = SkTEndian_SwapBE16(0); + /** Format 1 was added in OpenType 1.6 (April 2009). */ + static const SK_OT_USHORT format_1 = SkTEndian_SwapBE16(1); + + /** The number of name records which follow. */ + SK_OT_USHORT count; + + /** Offset in SK_OT_BYTEs to start of string storage area (from start of table). */ + SK_OT_USHORT stringOffset; + + struct Record { + /** The platform ID specifies how to interpret the encoding and language ID. */ + struct PlatformID { + enum Value : SK_OT_USHORT { + Unicode = SkTEndian_SwapBE16(0), + Macintosh = SkTEndian_SwapBE16(1), + ISO = SkTEndian_SwapBE16(2), // Deprecated, use Unicode instead. + Windows = SkTEndian_SwapBE16(3), + Custom = SkTEndian_SwapBE16(4), + } value; + } platformID; + + union EncodingID { + SK_OT_USHORT custom; + + /** Always UTF-16BE. */ + struct Unicode { + enum Value : SK_OT_USHORT { + Unicode10 = SkTEndian_SwapBE16(0), + Unicode11 = SkTEndian_SwapBE16(1), + ISO10646 = SkTEndian_SwapBE16(2), //deprecated, use Unicode11 + Unicode20BMP = SkTEndian_SwapBE16(3), + Unicode20 = SkTEndian_SwapBE16(4), + UnicodeVariationSequences = SkTEndian_SwapBE16(5), + UnicodeFull = SkTEndian_SwapBE16(6), + } value; + } unicode; + + /** These are Mac encodings, see http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/ + * for their mappings to unicode. + * Name table strings using PlatformID::Macintosh must use Roman. + */ + struct Macintosh { + enum Value : SK_OT_USHORT { + Roman = SkTEndian_SwapBE16(0), + Japanese = SkTEndian_SwapBE16(1), + ChineseTraditional = SkTEndian_SwapBE16(2), + Korean = SkTEndian_SwapBE16(3), + Arabic = SkTEndian_SwapBE16(4), + Hebrew = SkTEndian_SwapBE16(5), + Greek = SkTEndian_SwapBE16(6), + Russian = SkTEndian_SwapBE16(7), + RSymbol = SkTEndian_SwapBE16(8), + Devanagari = SkTEndian_SwapBE16(9), + Gurmukhi = SkTEndian_SwapBE16(10), + Gujarati = SkTEndian_SwapBE16(11), + Oriya = SkTEndian_SwapBE16(12), + Bengali = SkTEndian_SwapBE16(13), + Tamil = SkTEndian_SwapBE16(14), + Telugu = SkTEndian_SwapBE16(15), + Kannada = SkTEndian_SwapBE16(16), + Malayalam = SkTEndian_SwapBE16(17), + Sinhalese = SkTEndian_SwapBE16(18), + Burmese = SkTEndian_SwapBE16(19), + Khmer = SkTEndian_SwapBE16(20), + Thai = SkTEndian_SwapBE16(21), + Laotian = SkTEndian_SwapBE16(22), + Georgian = SkTEndian_SwapBE16(23), + Armenian = SkTEndian_SwapBE16(24), + ChineseSimplified = SkTEndian_SwapBE16(25), + Tibetan = SkTEndian_SwapBE16(26), + Mongolian = SkTEndian_SwapBE16(27), + Geez = SkTEndian_SwapBE16(28), + Slavic = SkTEndian_SwapBE16(29), + Vietnamese = SkTEndian_SwapBE16(30), + Sindhi = SkTEndian_SwapBE16(31), + Uninterpreted = SkTEndian_SwapBE16(32), + } value; + } macintosh; + + /** Deprecated, use Unicode instead. */ + struct ISO { + enum Value : SK_OT_USHORT { + ASCII7 = SkTEndian_SwapBE16(0), + ISO10646 = SkTEndian_SwapBE16(1), + ISO88591 = SkTEndian_SwapBE16(2), + } value; + } iso; + + /** Name table strings using PlatformID::Windows must use Symbol, UnicodeBMPUCS2, or + * UnicodeUCS4. Symbol and UnicodeBMPUCS2 are both UCS2-BE, UnicodeUCS4 is actually + * UTF-16BE. + */ + struct Windows { + enum Value : SK_OT_USHORT { + Symbol = SkTEndian_SwapBE16(0), // UCS2-BE, but don't use this font to display it's own name. + UnicodeBMPUCS2 = SkTEndian_SwapBE16(1), // UCS2-BE, Windows default + ShiftJIS = SkTEndian_SwapBE16(2), + PRC = SkTEndian_SwapBE16(3), + Big5 = SkTEndian_SwapBE16(4), + Wansung = SkTEndian_SwapBE16(5), + Johab = SkTEndian_SwapBE16(6), + UnicodeUCS4 = SkTEndian_SwapBE16(10), // UTF-16BE. It means UCS4 in charmaps. + } value; + } windows; + } encodingID; + + /** LanguageIDs <= 0x7FFF are predefined. + * LanguageIDs > 0x7FFF are indexes into the langTagRecord array + * (in format 1 name tables, see SkOTTableName::format). + */ + union LanguageID { + /** A value greater than 0x7FFF. + * languageTagID - 0x8000 is an index into the langTagRecord array. + */ + SK_OT_USHORT languageTagID; + + /** These are known as Language Designators. + * Apple now uses BCP 47 (post OSX10.4), so there will be no new entries. + */ + struct Macintosh { + enum Value : SK_OT_USHORT { + English = SkTEndian_SwapBE16(0), + French = SkTEndian_SwapBE16(1), + German = SkTEndian_SwapBE16(2), + Italian = SkTEndian_SwapBE16(3), + Dutch = SkTEndian_SwapBE16(4), + Swedish = SkTEndian_SwapBE16(5), + Spanish = SkTEndian_SwapBE16(6), + Danish = SkTEndian_SwapBE16(7), + Portuguese = SkTEndian_SwapBE16(8), + Norwegian = SkTEndian_SwapBE16(9), + Hebrew = SkTEndian_SwapBE16(10), + Japanese = SkTEndian_SwapBE16(11), + Arabic = SkTEndian_SwapBE16(12), + Finnish = SkTEndian_SwapBE16(13), + Greek = SkTEndian_SwapBE16(14), + Icelandic = SkTEndian_SwapBE16(15), + Maltese = SkTEndian_SwapBE16(16), + Turkish = SkTEndian_SwapBE16(17), + Croatian = SkTEndian_SwapBE16(18), + ChineseTraditional = SkTEndian_SwapBE16(19), + Urdu = SkTEndian_SwapBE16(20), + Hindi = SkTEndian_SwapBE16(21), + Thai = SkTEndian_SwapBE16(22), + Korean = SkTEndian_SwapBE16(23), + Lithuanian = SkTEndian_SwapBE16(24), + Polish = SkTEndian_SwapBE16(25), + Hungarian = SkTEndian_SwapBE16(26), + Estonian = SkTEndian_SwapBE16(27), + Latvian = SkTEndian_SwapBE16(28), + Sami = SkTEndian_SwapBE16(29), + Faroese = SkTEndian_SwapBE16(30), + Farsi_Persian = SkTEndian_SwapBE16(31), + Russian = SkTEndian_SwapBE16(32), + ChineseSimplified = SkTEndian_SwapBE16(33), + Flemish = SkTEndian_SwapBE16(34), + IrishGaelic = SkTEndian_SwapBE16(35), + Albanian = SkTEndian_SwapBE16(36), + Romanian = SkTEndian_SwapBE16(37), + Czech = SkTEndian_SwapBE16(38), + Slovak = SkTEndian_SwapBE16(39), + Slovenian = SkTEndian_SwapBE16(40), + Yiddish = SkTEndian_SwapBE16(41), + Serbian = SkTEndian_SwapBE16(42), + Macedonian = SkTEndian_SwapBE16(43), + Bulgarian = SkTEndian_SwapBE16(44), + Ukrainian = SkTEndian_SwapBE16(45), + Byelorussian = SkTEndian_SwapBE16(46), + Uzbek = SkTEndian_SwapBE16(47), + Kazakh = SkTEndian_SwapBE16(48), + AzerbaijaniCyrillic = SkTEndian_SwapBE16(49), + AzerbaijaniArabic = SkTEndian_SwapBE16(50), + Armenian = SkTEndian_SwapBE16(51), + Georgian = SkTEndian_SwapBE16(52), + Moldavian = SkTEndian_SwapBE16(53), + Kirghiz = SkTEndian_SwapBE16(54), + Tajiki = SkTEndian_SwapBE16(55), + Turkmen = SkTEndian_SwapBE16(56), + MongolianTraditional = SkTEndian_SwapBE16(57), + MongolianCyrillic = SkTEndian_SwapBE16(58), + Pashto = SkTEndian_SwapBE16(59), + Kurdish = SkTEndian_SwapBE16(60), + Kashmiri = SkTEndian_SwapBE16(61), + Sindhi = SkTEndian_SwapBE16(62), + Tibetan = SkTEndian_SwapBE16(63), + Nepali = SkTEndian_SwapBE16(64), + Sanskrit = SkTEndian_SwapBE16(65), + Marathi = SkTEndian_SwapBE16(66), + Bengali = SkTEndian_SwapBE16(67), + Assamese = SkTEndian_SwapBE16(68), + Gujarati = SkTEndian_SwapBE16(69), + Punjabi = SkTEndian_SwapBE16(70), + Oriya = SkTEndian_SwapBE16(71), + Malayalam = SkTEndian_SwapBE16(72), + Kannada = SkTEndian_SwapBE16(73), + Tamil = SkTEndian_SwapBE16(74), + Telugu = SkTEndian_SwapBE16(75), + Sinhalese = SkTEndian_SwapBE16(76), + Burmese = SkTEndian_SwapBE16(77), + Khmer = SkTEndian_SwapBE16(78), + Lao = SkTEndian_SwapBE16(79), + Vietnamese = SkTEndian_SwapBE16(80), + Indonesian = SkTEndian_SwapBE16(81), + Tagalong = SkTEndian_SwapBE16(82), + MalayRoman = SkTEndian_SwapBE16(83), + MalayArabic = SkTEndian_SwapBE16(84), + Amharic = SkTEndian_SwapBE16(85), + Tigrinya = SkTEndian_SwapBE16(86), + Galla = SkTEndian_SwapBE16(87), + Somali = SkTEndian_SwapBE16(88), + Swahili = SkTEndian_SwapBE16(89), + Kinyarwanda_Ruanda = SkTEndian_SwapBE16(90), + Rundi = SkTEndian_SwapBE16(91), + Nyanja_Chewa = SkTEndian_SwapBE16(92), + Malagasy = SkTEndian_SwapBE16(93), + Esperanto = SkTEndian_SwapBE16(94), + Welsh = SkTEndian_SwapBE16(128), + Basque = SkTEndian_SwapBE16(129), + Catalan = SkTEndian_SwapBE16(130), + Latin = SkTEndian_SwapBE16(131), + Quenchua = SkTEndian_SwapBE16(132), + Guarani = SkTEndian_SwapBE16(133), + Aymara = SkTEndian_SwapBE16(134), + Tatar = SkTEndian_SwapBE16(135), + Uighur = SkTEndian_SwapBE16(136), + Dzongkha = SkTEndian_SwapBE16(137), + JavaneseRoman = SkTEndian_SwapBE16(138), + SundaneseRoman = SkTEndian_SwapBE16(139), + Galician = SkTEndian_SwapBE16(140), + Afrikaans = SkTEndian_SwapBE16(141), + Breton = SkTEndian_SwapBE16(142), + Inuktitut = SkTEndian_SwapBE16(143), + ScottishGaelic = SkTEndian_SwapBE16(144), + ManxGaelic = SkTEndian_SwapBE16(145), + IrishGaelicWithLenition = SkTEndian_SwapBE16(146), + Tongan = SkTEndian_SwapBE16(147), + GreekPolytonic = SkTEndian_SwapBE16(148), + Greenlandic = SkTEndian_SwapBE16(149), + AzerbaijaniRoman = SkTEndian_SwapBE16(150), + } value; + } macintosh; + + /** These are known as LCIDs. + * On Windows the current set can be had from EnumSystemLocalesEx and LocaleNameToLCID. + */ + struct Windows { + enum Value : SK_OT_USHORT { + Afrikaans_SouthAfrica = SkTEndian_SwapBE16(0x0436), + Albanian_Albania = SkTEndian_SwapBE16(0x041C), + Alsatian_France = SkTEndian_SwapBE16(0x0484), + Amharic_Ethiopia = SkTEndian_SwapBE16(0x045E), + Arabic_Algeria = SkTEndian_SwapBE16(0x1401), + Arabic_Bahrain = SkTEndian_SwapBE16(0x3C01), + Arabic_Egypt = SkTEndian_SwapBE16(0x0C01), + Arabic_Iraq = SkTEndian_SwapBE16(0x0801), + Arabic_Jordan = SkTEndian_SwapBE16(0x2C01), + Arabic_Kuwait = SkTEndian_SwapBE16(0x3401), + Arabic_Lebanon = SkTEndian_SwapBE16(0x3001), + Arabic_Libya = SkTEndian_SwapBE16(0x1001), + Arabic_Morocco = SkTEndian_SwapBE16(0x1801), + Arabic_Oman = SkTEndian_SwapBE16(0x2001), + Arabic_Qatar = SkTEndian_SwapBE16(0x4001), + Arabic_SaudiArabia = SkTEndian_SwapBE16(0x0401), + Arabic_Syria = SkTEndian_SwapBE16(0x2801), + Arabic_Tunisia = SkTEndian_SwapBE16(0x1C01), + Arabic_UAE = SkTEndian_SwapBE16(0x3801), + Arabic_Yemen = SkTEndian_SwapBE16(0x2401), + Armenian_Armenia = SkTEndian_SwapBE16(0x042B), + Assamese_India = SkTEndian_SwapBE16(0x044D), + AzeriCyrillic_Azerbaijan = SkTEndian_SwapBE16(0x082C), + AzeriLatin_Azerbaijan = SkTEndian_SwapBE16(0x042C), + Bashkir_Russia = SkTEndian_SwapBE16(0x046D), + Basque_Basque = SkTEndian_SwapBE16(0x042D), + Belarusian_Belarus = SkTEndian_SwapBE16(0x0423), + Bengali_Bangladesh = SkTEndian_SwapBE16(0x0845), + Bengali_India = SkTEndian_SwapBE16(0x0445), + BosnianCyrillic_BosniaAndHerzegovina = SkTEndian_SwapBE16(0x201A), + BosnianLatin_BosniaAndHerzegovina = SkTEndian_SwapBE16(0x141A), + Breton_France = SkTEndian_SwapBE16(0x047E), + Bulgarian_Bulgaria = SkTEndian_SwapBE16(0x0402), + Catalan_Catalan = SkTEndian_SwapBE16(0x0403), + Chinese_HongKongSAR = SkTEndian_SwapBE16(0x0C04), + Chinese_MacaoSAR = SkTEndian_SwapBE16(0x1404), + Chinese_PeoplesRepublicOfChina = SkTEndian_SwapBE16(0x0804), + Chinese_Singapore = SkTEndian_SwapBE16(0x1004), + Chinese_Taiwan = SkTEndian_SwapBE16(0x0404), + Corsican_France = SkTEndian_SwapBE16(0x0483), + Croatian_Croatia = SkTEndian_SwapBE16(0x041A), + CroatianLatin_BosniaAndHerzegovina = SkTEndian_SwapBE16(0x101A), + Czech_CzechRepublic = SkTEndian_SwapBE16(0x0405), + Danish_Denmark = SkTEndian_SwapBE16(0x0406), + Dari_Afghanistan = SkTEndian_SwapBE16(0x048C), + Divehi_Maldives = SkTEndian_SwapBE16(0x0465), + Dutch_Belgium = SkTEndian_SwapBE16(0x0813), + Dutch_Netherlands = SkTEndian_SwapBE16(0x0413), + English_Australia = SkTEndian_SwapBE16(0x0C09), + English_Belize = SkTEndian_SwapBE16(0x2809), + English_Canada = SkTEndian_SwapBE16(0x1009), + English_Caribbean = SkTEndian_SwapBE16(0x2409), + English_India = SkTEndian_SwapBE16(0x4009), + English_Ireland = SkTEndian_SwapBE16(0x1809), + English_Jamaica = SkTEndian_SwapBE16(0x2009), + English_Malaysia = SkTEndian_SwapBE16(0x4409), + English_NewZealand = SkTEndian_SwapBE16(0x1409), + English_RepublicOfThePhilippines = SkTEndian_SwapBE16(0x3409), + English_Singapore = SkTEndian_SwapBE16(0x4809), + English_SouthAfrica = SkTEndian_SwapBE16(0x1C09), + English_TrinidadAndTobago = SkTEndian_SwapBE16(0x2C09), + English_UnitedKingdom = SkTEndian_SwapBE16(0x0809), + English_UnitedStates = SkTEndian_SwapBE16(0x0409), + English_Zimbabwe = SkTEndian_SwapBE16(0x3009), + Estonian_Estonia = SkTEndian_SwapBE16(0x0425), + Faroese_FaroeIslands = SkTEndian_SwapBE16(0x0438), + Filipino_Philippines = SkTEndian_SwapBE16(0x0464), + Finnish_Finland = SkTEndian_SwapBE16(0x040B), + French_Belgium = SkTEndian_SwapBE16(0x080C), + French_Canada = SkTEndian_SwapBE16(0x0C0C), + French_France = SkTEndian_SwapBE16(0x040C), + French_Luxembourg = SkTEndian_SwapBE16(0x140c), + French_PrincipalityOfMonoco = SkTEndian_SwapBE16(0x180C), + French_Switzerland = SkTEndian_SwapBE16(0x100C), + Frisian_Netherlands = SkTEndian_SwapBE16(0x0462), + Galician_Galician = SkTEndian_SwapBE16(0x0456), + Georgian_Georgia = SkTEndian_SwapBE16(0x0437), + German_Austria = SkTEndian_SwapBE16(0x0C07), + German_Germany = SkTEndian_SwapBE16(0x0407), + German_Liechtenstein = SkTEndian_SwapBE16(0x1407), + German_Luxembourg = SkTEndian_SwapBE16(0x1007), + German_Switzerland = SkTEndian_SwapBE16(0x0807), + Greek_Greece = SkTEndian_SwapBE16(0x0408), + Greenlandic_Greenland = SkTEndian_SwapBE16(0x046F), + Gujarati_India = SkTEndian_SwapBE16(0x0447), + HausaLatin_Nigeria = SkTEndian_SwapBE16(0x0468), + Hebrew_Israel = SkTEndian_SwapBE16(0x040D), + Hindi_India = SkTEndian_SwapBE16(0x0439), + Hungarian_Hungary = SkTEndian_SwapBE16(0x040E), + Icelandic_Iceland = SkTEndian_SwapBE16(0x040F), + Igbo_Nigeria = SkTEndian_SwapBE16(0x0470), + Indonesian_Indonesia = SkTEndian_SwapBE16(0x0421), + Inuktitut_Canada = SkTEndian_SwapBE16(0x045D), + InuktitutLatin_Canada = SkTEndian_SwapBE16(0x085D), + Irish_Ireland = SkTEndian_SwapBE16(0x083C), + isiXhosa_SouthAfrica = SkTEndian_SwapBE16(0x0434), + isiZulu_SouthAfrica = SkTEndian_SwapBE16(0x0435), + Italian_Italy = SkTEndian_SwapBE16(0x0410), + Italian_Switzerland = SkTEndian_SwapBE16(0x0810), + Japanese_Japan = SkTEndian_SwapBE16(0x0411), + Kannada_India = SkTEndian_SwapBE16(0x044B), + Kazakh_Kazakhstan = SkTEndian_SwapBE16(0x043F), + Khmer_Cambodia = SkTEndian_SwapBE16(0x0453), + Kiche_Guatemala = SkTEndian_SwapBE16(0x0486), + Kinyarwanda_Rwanda = SkTEndian_SwapBE16(0x0487), + Kiswahili_Kenya = SkTEndian_SwapBE16(0x0441), + Konkani_India = SkTEndian_SwapBE16(0x0457), + Korean_Korea = SkTEndian_SwapBE16(0x0412), + Kyrgyz_Kyrgyzstan = SkTEndian_SwapBE16(0x0440), + Lao_LaoPDR = SkTEndian_SwapBE16(0x0454), + Latvian_Latvia = SkTEndian_SwapBE16(0x0426), + Lithuanian_Lithuania = SkTEndian_SwapBE16(0x0427), + LowerSorbian_Germany = SkTEndian_SwapBE16(0x082E), + Luxembourgish_Luxembourg = SkTEndian_SwapBE16(0x046E), + MacedonianFYROM_FormerYugoslavRepublicOfMacedonia = SkTEndian_SwapBE16(0x042F), + Malay_BruneiDarussalam = SkTEndian_SwapBE16(0x083E), + Malay_Malaysia = SkTEndian_SwapBE16(0x043E), + Malayalam_India = SkTEndian_SwapBE16(0x044C), + Maltese_Malta = SkTEndian_SwapBE16(0x043A), + Maori_NewZealand = SkTEndian_SwapBE16(0x0481), + Mapudungun_Chile = SkTEndian_SwapBE16(0x047A), + Marathi_India = SkTEndian_SwapBE16(0x044E), + Mohawk_Mohawk = SkTEndian_SwapBE16(0x047C), + MongolianCyrillic_Mongolia = SkTEndian_SwapBE16(0x0450), + MongolianTraditional_PeoplesRepublicOfChina = SkTEndian_SwapBE16(0x0850), + Nepali_Nepal = SkTEndian_SwapBE16(0x0461), + NorwegianBokmal_Norway = SkTEndian_SwapBE16(0x0414), + NorwegianNynorsk_Norway = SkTEndian_SwapBE16(0x0814), + Occitan_France = SkTEndian_SwapBE16(0x0482), + Odia_India = SkTEndian_SwapBE16(0x0448), + Pashto_Afghanistan = SkTEndian_SwapBE16(0x0463), + Polish_Poland = SkTEndian_SwapBE16(0x0415), + Portuguese_Brazil = SkTEndian_SwapBE16(0x0416), + Portuguese_Portugal = SkTEndian_SwapBE16(0x0816), + Punjabi_India = SkTEndian_SwapBE16(0x0446), + Quechua_Bolivia = SkTEndian_SwapBE16(0x046B), + Quechua_Ecuador = SkTEndian_SwapBE16(0x086B), + Quechua_Peru = SkTEndian_SwapBE16(0x0C6B), + Romanian_Romania = SkTEndian_SwapBE16(0x0418), + Romansh_Switzerland = SkTEndian_SwapBE16(0x0417), + Russian_Russia = SkTEndian_SwapBE16(0x0419), + SamiInari_Finland = SkTEndian_SwapBE16(0x243B), + SamiLule_Norway = SkTEndian_SwapBE16(0x103B), + SamiLule_Sweden = SkTEndian_SwapBE16(0x143B), + SamiNorthern_Finland = SkTEndian_SwapBE16(0x0C3B), + SamiNorthern_Norway = SkTEndian_SwapBE16(0x043B), + SamiNorthern_Sweden = SkTEndian_SwapBE16(0x083B), + SamiSkolt_Finland = SkTEndian_SwapBE16(0x203B), + SamiSouthern_Norway = SkTEndian_SwapBE16(0x183B), + SamiSouthern_Sweden = SkTEndian_SwapBE16(0x1C3B), + Sanskrit_India = SkTEndian_SwapBE16(0x044F), + SerbianCyrillic_BosniaAndHerzegovina = SkTEndian_SwapBE16(0x1C1A), + SerbianCyrillic_Serbia = SkTEndian_SwapBE16(0x0C1A), + SerbianLatin_BosniaAndHerzegovina = SkTEndian_SwapBE16(0x181A), + SerbianLatin_Serbia = SkTEndian_SwapBE16(0x081A), + SesothoSaLeboa_SouthAfrica = SkTEndian_SwapBE16(0x046C), + Setswana_SouthAfrica = SkTEndian_SwapBE16(0x0432), + Sinhala_SriLanka = SkTEndian_SwapBE16(0x045B), + Slovak_Slovakia = SkTEndian_SwapBE16(0x041B), + Slovenian_Slovenia = SkTEndian_SwapBE16(0x0424), + Spanish_Argentina = SkTEndian_SwapBE16(0x2C0A), + Spanish_Bolivia = SkTEndian_SwapBE16(0x400A), + Spanish_Chile = SkTEndian_SwapBE16(0x340A), + Spanish_Colombia = SkTEndian_SwapBE16(0x240A), + Spanish_CostaRica = SkTEndian_SwapBE16(0x140A), + Spanish_DominicanRepublic = SkTEndian_SwapBE16(0x1C0A), + Spanish_Ecuador = SkTEndian_SwapBE16(0x300A), + Spanish_ElSalvador = SkTEndian_SwapBE16(0x440A), + Spanish_Guatemala = SkTEndian_SwapBE16(0x100A), + Spanish_Honduras = SkTEndian_SwapBE16(0x480A), + Spanish_Mexico = SkTEndian_SwapBE16(0x080A), + Spanish_Nicaragua = SkTEndian_SwapBE16(0x4C0A), + Spanish_Panama = SkTEndian_SwapBE16(0x180A), + Spanish_Paraguay = SkTEndian_SwapBE16(0x3C0A), + Spanish_Peru = SkTEndian_SwapBE16(0x280A), + Spanish_PuertoRico = SkTEndian_SwapBE16(0x500A), + SpanishModernSort_Spain = SkTEndian_SwapBE16(0x0C0A), + SpanishTraditionalSort_Spain = SkTEndian_SwapBE16(0x040A), + Spanish_UnitedStates = SkTEndian_SwapBE16(0x540A), + Spanish_Uruguay = SkTEndian_SwapBE16(0x380A), + Spanish_Venezuela = SkTEndian_SwapBE16(0x200A), + Sweden_Finland = SkTEndian_SwapBE16(0x081D), + Swedish_Sweden = SkTEndian_SwapBE16(0x041D), + Syriac_Syria = SkTEndian_SwapBE16(0x045A), + TajikCyrillic_Tajikistan = SkTEndian_SwapBE16(0x0428), + TamazightLatin_Algeria = SkTEndian_SwapBE16(0x085F), + Tamil_India = SkTEndian_SwapBE16(0x0449), + Tatar_Russia = SkTEndian_SwapBE16(0x0444), + Telugu_India = SkTEndian_SwapBE16(0x044A), + Thai_Thailand = SkTEndian_SwapBE16(0x041E), + Tibetan_PRC = SkTEndian_SwapBE16(0x0451), + Turkish_Turkey = SkTEndian_SwapBE16(0x041F), + Turkmen_Turkmenistan = SkTEndian_SwapBE16(0x0442), + Uighur_PRC = SkTEndian_SwapBE16(0x0480), + Ukrainian_Ukraine = SkTEndian_SwapBE16(0x0422), + UpperSorbian_Germany = SkTEndian_SwapBE16(0x042E), + Urdu_IslamicRepublicOfPakistan = SkTEndian_SwapBE16(0x0420), + UzbekCyrillic_Uzbekistan = SkTEndian_SwapBE16(0x0843), + UzbekLatin_Uzbekistan = SkTEndian_SwapBE16(0x0443), + Vietnamese_Vietnam = SkTEndian_SwapBE16(0x042A), + Welsh_UnitedKingdom = SkTEndian_SwapBE16(0x0452), + Wolof_Senegal = SkTEndian_SwapBE16(0x0488), + Yakut_Russia = SkTEndian_SwapBE16(0x0485), + Yi_PRC = SkTEndian_SwapBE16(0x0478), + Yoruba_Nigeria = SkTEndian_SwapBE16(0x046A), + } value; + } windows; + } languageID; + + /** NameIDs <= 0xFF are predefined. Those > 0xFF are font specific. */ + union NameID { + /** A font specific name id which should be greater than 0xFF. */ + SK_OT_USHORT fontSpecific; + struct Predefined { + enum Value : SK_OT_USHORT { + CopyrightNotice = SkTEndian_SwapBE16(0), + FontFamilyName = SkTEndian_SwapBE16(1), + FontSubfamilyName = SkTEndian_SwapBE16(2), + UniqueFontIdentifier = SkTEndian_SwapBE16(3), + FullFontName = SkTEndian_SwapBE16(4), + VersionString = SkTEndian_SwapBE16(5), //Version . + PostscriptName = SkTEndian_SwapBE16(6), //See spec for constraints. + Trademark = SkTEndian_SwapBE16(7), + ManufacturerName = SkTEndian_SwapBE16(8), + Designer = SkTEndian_SwapBE16(9), + Description = SkTEndian_SwapBE16(10), + URLVendor = SkTEndian_SwapBE16(11), + URLDesigner = SkTEndian_SwapBE16(12), + LicenseDescription = SkTEndian_SwapBE16(13), + LicenseInfoURL = SkTEndian_SwapBE16(14), + PreferredFamily = SkTEndian_SwapBE16(16), + PreferredSubfamily = SkTEndian_SwapBE16(17), + CompatibleFullName = SkTEndian_SwapBE16(18), + SampleText = SkTEndian_SwapBE16(19), + PostscriptCIDFindfontName = SkTEndian_SwapBE16(20), + WWSFamilyName = SkTEndian_SwapBE16(21), + WWSSubfamilyName = SkTEndian_SwapBE16(22), + } value; + } predefined; + } nameID; + + /** The length of the string in SK_OT_BYTEs. */ + SK_OT_USHORT length; + + /** Offset in SK_OT_BYTEs from start of string storage area + * (see SkOTTableName::stringOffset). + */ + SK_OT_USHORT offset; + }; //nameRecord[count]; + + struct Format1Ext { + /** The number of languageTagRecords which follow. */ + SK_OT_USHORT langTagCount; + + /** The encoding of a langTagRecord string is always UTF-16BE. + * The content should follow IETF specification BCP 47. + */ + struct LangTagRecord { + /** The length of the string in SK_OT_BYTEs. */ + SK_OT_USHORT length; + + /** Offset in SK_OT_BYTEs from start of string storage area + * (see SkOTTableName::stringOffset). + */ + SK_OT_USHORT offset; + }; //langTagRecord[langTagCount] + }; //format1ext (if format == format_1) + + class Iterator { + public: + Iterator(const uint8_t* nameTable, size_t size) + : fNameTable(nameTable), fNameTableSize(size), fIndex(0), fType(-1) { } + Iterator(const uint8_t* nameTable, size_t size, SK_OT_USHORT type) + : fNameTable(nameTable), fNameTableSize(size), fIndex(0), fType(type) + { } + + void reset(SK_OT_USHORT type) { + fIndex = 0; + fType = type; + } + + struct Record { + SkString name; + SkString language; + SK_OT_USHORT type; + }; + bool next(Record&); + + private: + const uint8_t* fNameTable; + const size_t fNameTableSize; + size_t fIndex; + int fType; + }; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkOTTableName) == 6, "sizeof_SkOTTableName_not_6"); +static_assert(sizeof(SkOTTableName::Format1Ext) == 2, "sizeof_SkOTTableNameF1_not_2"); +static_assert(sizeof(SkOTTableName::Format1Ext::LangTagRecord) == 4, "sizeof_SkOTTableNameLangTagRecord_not_4"); +static_assert(sizeof(SkOTTableName::Record) == 12, "sizeof_SkOTTableNameRecord_not_12"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTTable_post.h b/gfx/skia/skia/src/sfnt/SkOTTable_post.h new file mode 100644 index 0000000000..7f85ca4215 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTTable_post.h @@ -0,0 +1,50 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTTable_post_DEFINED +#define SkOTTable_post_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkOTTablePostScript { + static const SK_OT_CHAR TAG0 = 'p'; + static const SK_OT_CHAR TAG1 = 'o'; + static const SK_OT_CHAR TAG2 = 's'; + static const SK_OT_CHAR TAG3 = 't'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + struct Format { + enum Value : SK_OT_Fixed { + version1 = SkTEndian_SwapBE32(0x00010000), + version2 = SkTEndian_SwapBE32(0x00020000), + version2_5 = SkTEndian_SwapBE32(0x00025000), + version3 = SkTEndian_SwapBE32(0x00030000), + version4 = SkTEndian_SwapBE32(0x00040000), + }; + SK_OT_Fixed value; + } format; + SK_OT_Fixed italicAngle; + SK_OT_FWORD underlinePosition; + SK_OT_FWORD underlineThickness; + SK_OT_ULONG isFixedPitch; + SK_OT_ULONG minMemType42; + SK_OT_ULONG maxMemType42; + SK_OT_ULONG minMemType1; + SK_OT_ULONG maxMemType1; +}; + +#pragma pack(pop) + + +#include +static_assert(offsetof(SkOTTablePostScript, maxMemType1) == 28, "SkOTTablePostScript_maxMemType1_not_at_28"); +static_assert(sizeof(SkOTTablePostScript) == 32, "sizeof_SkOTTablePostScript_not_32"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkOTUtils.cpp b/gfx/skia/skia/src/sfnt/SkOTUtils.cpp new file mode 100644 index 0000000000..0dd44a079a --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTUtils.cpp @@ -0,0 +1,231 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include + +#include "src/sfnt/SkOTUtils.h" + +#include "include/core/SkData.h" +#include "include/core/SkStream.h" +#include "include/private/base/SkTo.h" +#include "src/base/SkEndian.h" +#include "src/core/SkAdvancedTypefaceMetrics.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_head.h" +#include "src/sfnt/SkOTTable_name.h" +#include "src/sfnt/SkSFNTHeader.h" + +uint32_t SkOTUtils::CalcTableChecksum(SK_OT_ULONG *data, size_t length) { + uint32_t sum = 0; + SK_OT_ULONG *dataEnd = data + ((length + 3) & ~3) / sizeof(SK_OT_ULONG); + for (; data < dataEnd; ++data) { + sum += SkEndian_SwapBE32(*data); + } + return sum; +} + +SkData* SkOTUtils::RenameFont(SkStreamAsset* fontData, const char* fontName, int fontNameLen) { + + // Get the sfnt header. + SkSFNTHeader sfntHeader; + if (fontData->read(&sfntHeader, sizeof(sfntHeader)) < sizeof(sfntHeader)) { + return nullptr; + } + + // Find the existing 'name' table. + int tableIndex; + SkSFNTHeader::TableDirectoryEntry tableEntry; + int numTables = SkEndian_SwapBE16(sfntHeader.numTables); + for (tableIndex = 0; tableIndex < numTables; ++tableIndex) { + if (fontData->read(&tableEntry, sizeof(tableEntry)) < sizeof(tableEntry)) { + return nullptr; + } + if (SkOTTableName::TAG == tableEntry.tag) { + break; + } + } + if (tableIndex == numTables) { + return nullptr; + } + + if (!fontData->rewind()) { + return nullptr; + } + + // The required 'name' record types: Family, Style, Unique, Full and PostScript. + static constexpr std::array names{{ + SkOTTableName::Record::NameID::Predefined::FontFamilyName, + SkOTTableName::Record::NameID::Predefined::FontSubfamilyName, + SkOTTableName::Record::NameID::Predefined::UniqueFontIdentifier, + SkOTTableName::Record::NameID::Predefined::FullFontName, + SkOTTableName::Record::NameID::Predefined::PostscriptName, + }}; + + // GDI will not use a Symbol cmap table if there is no Symbol encoded name. + static constexpr std::array encodings{{ + SkOTTableName::Record::EncodingID::Windows::Symbol, + SkOTTableName::Record::EncodingID::Windows::UnicodeBMPUCS2, + }}; + + // Copy the data, leaving out the old name table. + // In theory, we could also remove the DSIG table if it exists. + size_t nameTableLogicalSize = sizeof(SkOTTableName) + + (encodings.size() * names.size() * sizeof(SkOTTableName::Record)) + + (fontNameLen * sizeof(SK_OT_USHORT)); + size_t nameTablePhysicalSize = (nameTableLogicalSize + 3) & ~3; // Rounded up to a multiple of 4. + + size_t oldNameTablePhysicalSize = (SkEndian_SwapBE32(tableEntry.logicalLength) + 3) & ~3; // Rounded up to a multiple of 4. + size_t oldNameTableOffset = SkEndian_SwapBE32(tableEntry.offset); + + //originalDataSize is the size of the original data without the name table. + size_t originalDataSize = fontData->getLength() - oldNameTablePhysicalSize; + size_t newDataSize = originalDataSize + nameTablePhysicalSize; + + auto rewrittenFontData = SkData::MakeUninitialized(newDataSize); + SK_OT_BYTE* data = static_cast(rewrittenFontData->writable_data()); + + if (fontData->read(data, oldNameTableOffset) < oldNameTableOffset) { + return nullptr; + } + if (fontData->skip(oldNameTablePhysicalSize) < oldNameTablePhysicalSize) { + return nullptr; + } + if (fontData->read(data + oldNameTableOffset, originalDataSize - oldNameTableOffset) < originalDataSize - oldNameTableOffset) { + return nullptr; + } + + //Fix up the offsets of the directory entries after the old 'name' table entry. + SkSFNTHeader::TableDirectoryEntry* currentEntry = reinterpret_cast(data + sizeof(SkSFNTHeader)); + SkSFNTHeader::TableDirectoryEntry* endEntry = currentEntry + numTables; + SkSFNTHeader::TableDirectoryEntry* headTableEntry = nullptr; + for (; currentEntry < endEntry; ++currentEntry) { + uint32_t oldOffset = SkEndian_SwapBE32(currentEntry->offset); + if (oldOffset > oldNameTableOffset) { + currentEntry->offset = SkEndian_SwapBE32(SkToU32(oldOffset - oldNameTablePhysicalSize)); + } + + if (SkOTTableHead::TAG == currentEntry->tag) { + headTableEntry = currentEntry; + } + } + + // Make the table directory entry point to the new 'name' table. + SkSFNTHeader::TableDirectoryEntry* nameTableEntry = reinterpret_cast(data + sizeof(SkSFNTHeader)) + tableIndex; + nameTableEntry->logicalLength = SkEndian_SwapBE32(SkToU32(nameTableLogicalSize)); + nameTableEntry->offset = SkEndian_SwapBE32(SkToU32(originalDataSize)); + + // Write the new 'name' table after the original font data. + SkOTTableName* nameTable = reinterpret_cast(data + originalDataSize); + unsigned short stringOffset = sizeof(SkOTTableName) + (encodings.size() * names.size() * sizeof(SkOTTableName::Record)); + nameTable->format = SkOTTableName::format_0; + nameTable->count = SkEndian_SwapBE16(encodings.size() * names.size()); + nameTable->stringOffset = SkEndian_SwapBE16(stringOffset); + + SkOTTableName::Record* nameRecord = reinterpret_cast(data + originalDataSize + sizeof(SkOTTableName)); + for (const auto& encoding : encodings) { + for (const auto& name : names) { + nameRecord->platformID.value = SkOTTableName::Record::PlatformID::Windows; + nameRecord->encodingID.windows.value = encoding; + nameRecord->languageID.windows.value = SkOTTableName::Record::LanguageID::Windows::English_UnitedStates; + nameRecord->nameID.predefined.value = name; + nameRecord->offset = SkEndian_SwapBE16(0); + nameRecord->length = SkEndian_SwapBE16(SkToU16(fontNameLen * sizeof(SK_OT_USHORT))); + ++nameRecord; + } + } + + SK_OT_USHORT* nameString = reinterpret_cast(data + originalDataSize + stringOffset); + for (int i = 0; i < fontNameLen; ++i) { + nameString[i] = SkEndian_SwapBE16(fontName[i]); + } + + unsigned char* logical = data + originalDataSize + nameTableLogicalSize; + unsigned char* physical = data + originalDataSize + nameTablePhysicalSize; + for (; logical < physical; ++logical) { + *logical = 0; + } + + // Update the table checksum in the directory entry. + nameTableEntry->checksum = SkEndian_SwapBE32(SkOTUtils::CalcTableChecksum(reinterpret_cast(nameTable), nameTableLogicalSize)); + + // Update the checksum adjustment in the head table. + if (headTableEntry) { + size_t headTableOffset = SkEndian_SwapBE32(headTableEntry->offset); + if (headTableOffset + sizeof(SkOTTableHead) < originalDataSize) { + SkOTTableHead* headTable = reinterpret_cast(data + headTableOffset); + headTable->checksumAdjustment = SkEndian_SwapBE32(0); + uint32_t unadjustedFontChecksum = SkOTUtils::CalcTableChecksum(reinterpret_cast(data), originalDataSize + nameTablePhysicalSize); + headTable->checksumAdjustment = SkEndian_SwapBE32(SkOTTableHead::fontChecksum - unadjustedFontChecksum); + } + } + + return rewrittenFontData.release(); +} + +sk_sp +SkOTUtils::LocalizedStrings_NameTable::Make(const SkTypeface& typeface, + SK_OT_USHORT types[], + int typesCount) +{ + static const SkFontTableTag nameTag = SkSetFourByteTag('n','a','m','e'); + size_t nameTableSize = typeface.getTableSize(nameTag); + if (0 == nameTableSize) { + return nullptr; + } + std::unique_ptr nameTableData(new uint8_t[nameTableSize]); + size_t copied = typeface.getTableData(nameTag, 0, nameTableSize, nameTableData.get()); + if (copied != nameTableSize) { + return nullptr; + } + + return sk_sp( + new SkOTUtils::LocalizedStrings_NameTable(std::move(nameTableData), nameTableSize, + types, typesCount)); +} + +sk_sp +SkOTUtils::LocalizedStrings_NameTable::MakeForFamilyNames(const SkTypeface& typeface) { + return Make(typeface, + SkOTUtils::LocalizedStrings_NameTable::familyNameTypes, + std::size(SkOTUtils::LocalizedStrings_NameTable::familyNameTypes)); +} + +bool SkOTUtils::LocalizedStrings_NameTable::next(SkTypeface::LocalizedString* localizedString) { + do { + SkOTTableName::Iterator::Record record; + if (fFamilyNameIter.next(record)) { + localizedString->fString = record.name; + localizedString->fLanguage = record.language; + return true; + } + if (fTypesCount == fTypesIndex + 1) { + return false; + } + ++fTypesIndex; + fFamilyNameIter.reset(fTypes[fTypesIndex]); + } while (true); +} + +SK_OT_USHORT SkOTUtils::LocalizedStrings_NameTable::familyNameTypes[3] = { + SkOTTableName::Record::NameID::Predefined::FontFamilyName, + SkOTTableName::Record::NameID::Predefined::PreferredFamily, + SkOTTableName::Record::NameID::Predefined::WWSFamilyName, +}; + +void SkOTUtils::SetAdvancedTypefaceFlags(SkOTTableOS2_V4::Type fsType, + SkAdvancedTypefaceMetrics* info) { + SkASSERT(info); + // The logic should be identical to SkTypeface_FreeType::onGetAdvancedMetrics(). + if (fsType.raw.value != 0) { + if (SkToBool(fsType.field.Restricted) || SkToBool(fsType.field.Bitmap)) { + info->fFlags |= SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag; + } + if (SkToBool(fsType.field.NoSubsetting)) { + info->fFlags |= SkAdvancedTypefaceMetrics::kNotSubsettable_FontFlag; + } + } +} diff --git a/gfx/skia/skia/src/sfnt/SkOTUtils.h b/gfx/skia/skia/src/sfnt/SkOTUtils.h new file mode 100644 index 0000000000..fb2732385c --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkOTUtils.h @@ -0,0 +1,105 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkOTUtils_DEFINED +#define SkOTUtils_DEFINED + +#include "include/core/SkTypeface.h" +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkOTTable_OS_2_V4.h" +#include "src/sfnt/SkOTTable_name.h" + +class SkData; +class SkStream; +struct SkAdvancedTypefaceMetrics; + +struct SkOTUtils { + /** + * Calculates the OpenType checksum for data. + */ + static uint32_t CalcTableChecksum(SK_OT_ULONG *data, size_t length); + + /** + * Renames an sfnt font. On failure (invalid data or not an sfnt font) + * returns nullptr. + * + * Essentially, this removes any existing 'name' table and replaces it + * with a new one in which FontFamilyName, FontSubfamilyName, + * UniqueFontIdentifier, FullFontName, and PostscriptName are fontName. + * + * The new 'name' table records will be written with the Windows, + * UnicodeBMPUCS2, and English_UnitedStates settings. + * + * fontName and fontNameLen must be specified in terms of ASCII chars. + * + * Does not affect fontData's ownership. + */ + static SkData* RenameFont(SkStreamAsset* fontData, const char* fontName, int fontNameLen); + + /** An implementation of LocalizedStrings which obtains it's data from a 'name' table. */ + class LocalizedStrings_NameTable : public SkTypeface::LocalizedStrings { + public: + /** Takes ownership of the nameTableData and will free it with SK_DELETE. */ + LocalizedStrings_NameTable(std::unique_ptr nameTableData, size_t size, + SK_OT_USHORT types[], + int typesCount) + : fTypes(types), fTypesCount(typesCount), fTypesIndex(0) + , fNameTableData(std::move(nameTableData)) + , fFamilyNameIter(fNameTableData.get(), size, fTypes[fTypesIndex]) + { } + + /** Creates an iterator over all data in the 'name' table of a typeface. + * If no valid 'name' table can be found, returns nullptr. + */ + static sk_sp Make( + const SkTypeface& typeface, + SK_OT_USHORT types[], + int typesCount); + + /** Creates an iterator over all the family names in the 'name' table of a typeface. + * If no valid 'name' table can be found, returns nullptr. + */ + static sk_sp MakeForFamilyNames(const SkTypeface& typeface); + + bool next(SkTypeface::LocalizedString* localizedString) override; + private: + static SK_OT_USHORT familyNameTypes[3]; + + SK_OT_USHORT* fTypes; + int fTypesCount; + int fTypesIndex; + std::unique_ptr fNameTableData; + SkOTTableName::Iterator fFamilyNameIter; + }; + + /** An implementation of LocalizedStrings which has one name. */ + class LocalizedStrings_SingleName : public SkTypeface::LocalizedStrings { + public: + LocalizedStrings_SingleName(SkString name, SkString language) + : fName(name), fLanguage(language), fHasNext(true) + { } + + bool next(SkTypeface::LocalizedString* localizedString) override { + localizedString->fString = fName; + localizedString->fLanguage = fLanguage; + + bool hadNext = fHasNext; + fHasNext = false; + return hadNext; + } + + private: + SkString fName; + SkString fLanguage; + bool fHasNext; + }; + + static void SetAdvancedTypefaceFlags(SkOTTableOS2_V4::Type fsType, + SkAdvancedTypefaceMetrics* info); +}; + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkPanose.h b/gfx/skia/skia/src/sfnt/SkPanose.h new file mode 100644 index 0000000000..50ccb7a301 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkPanose.h @@ -0,0 +1,527 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPanose_DEFINED +#define SkPanose_DEFINED + +#include "src/sfnt/SkOTTableTypes.h" + +#pragma pack(push, 1) + +struct SkPanose { + //This value changes the meaning of the following 9 bytes. + enum class FamilyType : SK_OT_BYTE { + Any = 0, + NoFit = 1, + TextAndDisplay = 2, + Script = 3, + Decorative = 4, + Pictoral = 5, + } bFamilyType; + + union Data { + struct TextAndDisplay { + enum class SerifStyle : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Cove = 2, + ObtuseCove = 3, + SquareCove = 4, + ObtuseSquareCove = 5, + Square = 6, + Thin = 7, + Bone = 8, + Exaggerated = 9, + Triangle = 10, + NormalSans = 11, + ObtuseSans = 12, + PerpSans = 13, + Flared = 14, + Rounded = 15, + } bSerifStyle; + + enum class Weight : SK_OT_BYTE { + Any = 0, + NoFit = 1, + VeryLight = 2, + Light = 3, + Thin = 4, + Book = 5, + Medium = 6, + Demi = 7, + Bold = 8, + Heavy = 9, + Black = 10, + ExtraBlack = 11, + } bWeight; + + enum class Proportion : SK_OT_BYTE { + Any = 0, + NoFit = 1, + OldStyle = 2, + Modern = 3, + EvenWidth = 4, + Expanded = 5, + Condensed = 6, + VeryExpanded = 7, + VeryCondensed = 8, + Monospaced = 9, + } bProportion; + + enum class Contrast : SK_OT_BYTE { + Any = 0, + NoFit = 1, + None = 2, + VeryLow = 3, + Low = 4, + MediumLow = 5, + Medium = 6, + MediumHigh = 7, + High = 8, + VeryHigh = 9, + } bContrast; + +#ifdef SK_WIN_PANOSE + //This is what Windows (and FontForge and Apple TT spec) define. + //The Impact font uses 9. + enum class StrokeVariation : SK_OT_BYTE { + Any = 0, + NoFit = 1, + GradualDiagonal = 2, + GradualTransitional = 3, + GradualVertical = 4, + GradualHorizontal = 5, + RapidVertical = 6, + RapidHorizontal = 7, + InstantVertical = 8, + } bStrokeVariation; +#else + //Stroke variation description in OT OS/2 ver0,ver1 is incorrect. + //This is what HP Panose says. + enum class StrokeVariation : SK_OT_BYTE { + Any = 0, + NoFit = 1, + NoVariation = 2, + Gradual_Diagonal = 3, + Gradual_Transitional = 4, + Gradual_Vertical = 5, + Gradual_Horizontal = 6, + Rapid_Vertical = 7, + Rapid_Horizontal = 8, + Instant_Vertical = 9, + Instant_Horizontal = 10, + } bStrokeVariation; +#endif + + enum class ArmStyle : SK_OT_BYTE { + Any = 0, + NoFit = 1, + StraightArms_Horizontal = 2, + StraightArms_Wedge = 3, + StraightArms_Vertical = 4, + StraightArms_SingleSerif = 5, + StraightArms_DoubleSerif = 6, + NonStraightArms_Horizontal = 7, + NonStraightArms_Wedge = 8, + NonStraightArms_Vertical = 9, + NonStraightArms_SingleSerif = 10, + NonStraightArms_DoubleSerif = 11, + } bArmStyle; + + enum class Letterform : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Normal_Contact = 2, + Normal_Weighted = 3, + Normal_Boxed = 4, + Normal_Flattened = 5, + Normal_Rounded = 6, + Normal_OffCenter = 7, + Normal_Square = 8, + Oblique_Contact = 9, + Oblique_Weighted = 10, + Oblique_Boxed = 11, + Oblique_Flattened = 12, + Oblique_Rounded = 13, + Oblique_OffCenter = 14, + Oblique_Square = 15, + } bLetterform; + + enum class Midline : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Standard_Trimmed = 2, + Standard_Pointed = 3, + Standard_Serifed = 4, + High_Trimmed = 5, + High_Pointed = 6, + High_Serifed = 7, + Constant_Trimmed = 8, + Constant_Pointed = 9, + Constant_Serifed = 10, + Low_Trimmed = 11, + Low_Pointed = 12, + Low_Serifed = 13, + } bMidline; + + enum class XHeight : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Constant_Small = 2, + Constant_Standard = 3, + Constant_Large = 4, + Ducking_Small = 5, + Ducking_Standard = 6, + Ducking_Large = 7, + } bXHeight; + } textAndDisplay; + + struct Script { + enum class ToolKind : SK_OT_BYTE { + Any = 0, + NoFit = 1, + FlatNib = 2, + PressurePoint = 3, + Engraved = 4, + Ball = 5, + Brush = 6, + Rough = 7, + FeltPen = 8, + WildBrush = 9, + } bToolKind; + + enum class Weight : SK_OT_BYTE { + Any = 0, + NoFit = 1, + VeryLight = 2, + Light = 3, + Thin = 4, + Book = 5, + Medium = 6, + Demi = 7, + Bold = 8, + Heavy = 9, + Black = 10, + ExtraBlack = 11, + } bWeight; + + enum class Spacing : SK_OT_BYTE { + Any = 0, + NoFit = 1, + ProportionalSpaced = 2, + Monospaced = 3, + } bSpacing; + + enum class AspectRatio : SK_OT_BYTE { + Any = 0, + NoFit = 1, + VeryCondensed = 2, + Condensed = 3, + Normal = 4, + Expanded = 5, + VeryExpanded = 6, + } bAspectRatio; + + enum class Contrast : SK_OT_BYTE { + Any = 0, + NoFit = 1, + None = 2, + VeryLow = 3, + Low = 4, + MediumLow = 5, + Medium = 6, + MediumHigh = 7, + High = 8, + VeryHigh = 9, + } bContrast; + + enum class Topology : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Roman_Disconnected = 2, + Roman_Trailing = 3, + Roman_Connected = 4, + Cursive_Disconnected = 5, + Cursive_Trailing = 6, + Cursive_Connected = 7, + Blackletter_Disconnected = 8, + Blackletter_Trailing = 9, + Blackletter_Connected = 10, + } bTopology; + + enum class Form : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Upright_NoWrapping = 2, + Upright_SomeWrapping = 3, + Upright_MoreWrapping = 4, + Upright_ExtremeWrapping = 5, + Oblique_NoWrapping = 6, + Oblique_SomeWrapping = 7, + Oblique_MoreWrapping = 8, + Oblique_ExtremeWrapping = 9, + Exaggerated_NoWrapping = 10, + Exaggerated_SomeWrapping = 11, + Exaggerated_MoreWrapping = 12, + Exaggerated_ExtremeWrapping = 13, + } bForm; + + enum class Finials : SK_OT_BYTE { + Any = 0, + NoFit = 1, + None_NoLoops = 2, + None_ClosedLoops = 3, + None_OpenLoops = 4, + Sharp_NoLoops = 5, + Sharp_ClosedLoops = 6, + Sharp_OpenLoops = 7, + Tapered_NoLoops = 8, + Tapered_ClosedLoops = 9, + Tapered_OpenLoops = 10, + Round_NoLoops = 11, + Round_ClosedLoops = 12, + Round_OpenLoops = 13, + } bFinials; + + enum class XAscent : SK_OT_BYTE { + Any = 0, + NoFit = 1, + VeryLow = 2, + Low = 3, + Medium = 4, + High = 5, + VeryHigh = 6, + } bXAscent; + } script; + + struct Decorative { + enum class Class : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Derivative = 2, + NonStandard_Topology = 3, + NonStandard_Elements = 4, + NonStandard_Aspect = 5, + Initials = 6, + Cartoon = 7, + PictureStems = 8, + Ornamented = 9, + TextAndBackground = 10, + Collage = 11, + Montage = 12, + } bClass; + + enum class Weight : SK_OT_BYTE { + Any = 0, + NoFit = 1, + VeryLight = 2, + Light = 3, + Thin = 4, + Book = 5, + Medium = 6, + Demi = 7, + Bold = 8, + Heavy = 9, + Black = 10, + ExtraBlack = 11, + } bWeight; + + enum class Aspect : SK_OT_BYTE { + Any = 0, + NoFit = 1, + SuperCondensed = 2, + VeryCondensed = 3, + Condensed = 4, + Normal = 5, + Extended = 6, + VeryExtended = 7, + SuperExtended = 8, + Monospaced = 9, + } bAspect; + + enum class Contrast : SK_OT_BYTE { + Any = 0, + NoFit = 1, + None = 2, + VeryLow = 3, + Low = 4, + MediumLow = 5, + Medium = 6, + MediumHigh = 7, + High = 8, + VeryHigh = 9, + HorizontalLow = 10, + HorizontalMedium = 11, + HorizontalHigh = 12, + Broken = 13, + } bContrast; + + enum class SerifVariant : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Cove = 2, + ObtuseCove = 3, + SquareCove = 4, + ObtuseSquareCove = 5, + Square = 6, + Thin = 7, + Oval = 8, + Exaggerated = 9, + Triangle = 10, + NormalSans = 11, + ObtuseSans = 12, + PerpendicularSans = 13, + Flared = 14, + Rounded = 15, + Script = 16, + } bSerifVariant; + + enum class Treatment : SK_OT_BYTE { + Any = 0, + NoFit = 1, + None_StandardSolidFill = 2, + White_NoFill = 3, + PatternedFill = 4, + ComplexFill = 5, + ShapedFill = 6, + DrawnDistressed = 7, + } bTreatment; + + enum class Lining : SK_OT_BYTE { + Any = 0, + NoFit = 1, + None = 2, + Inline = 3, + Outline = 4, + Engraved = 5, + Shadow = 6, + Relief = 7, + Backdrop = 8, + } bLining; + + enum class Topology : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Standard = 2, + Square = 3, + MultipleSegment = 4, + DecoWacoMidlines = 5, + UnevenWeighting = 6, + DiverseArms = 7, + DiverseForms = 8, + LombardicForms = 9, + UpperCaseInLowerCase = 10, + ImpliedTopology = 11, + HorseshoeEandA = 12, + Cursive = 13, + Blackletter = 14, + SwashVariance = 15, + } bTopology; + + enum class RangeOfCharacters : SK_OT_BYTE { + Any = 0, + NoFit = 1, + ExtendedCollection = 2, + Litterals = 3, + NoLowerCase = 4, + SmallCaps = 5, + } bRangeOfCharacters; + } decorative; + + struct Pictoral { + enum class Kind : SK_OT_BYTE { + Any = 0, + NoFit = 1, + Montages = 2, + Pictures = 3, + Shapes = 4, + Scientific = 5, + Music = 6, + Expert = 7, + Patterns = 8, + Boarders = 9, + Icons = 10, + Logos = 11, + IndustrySpecific = 12, + } bKind; + + enum class Weight : SK_OT_BYTE { + NoFit = 1, + } bWeight; + + enum class Spacing : SK_OT_BYTE { + Any = 0, + NoFit = 1, + ProportionalSpaced = 2, + Monospaced = 3, + } bSpacing; + + enum class AspectRatioAndContrast : SK_OT_BYTE { + NoFit = 1, + } bAspectRatioAndContrast; + + enum class AspectRatio94 : SK_OT_BYTE { + Any = 0, + NoFit = 1, + NoWidth = 2, + ExceptionallyWide = 3, + SuperWide = 4, + VeryWide = 5, + Wide = 6, + Normal = 7, + Narrow = 8, + VeryNarrow = 9, + } bAspectRatio94; + + enum class AspectRatio119 : SK_OT_BYTE { + Any = 0, + NoFit = 1, + NoWidth = 2, + ExceptionallyWide = 3, + SuperWide = 4, + VeryWide = 5, + Wide = 6, + Normal = 7, + Narrow = 8, + VeryNarrow = 9, + } bAspectRatio119; + + enum class AspectRatio157 : SK_OT_BYTE { + Any = 0, + NoFit = 1, + NoWidth = 2, + ExceptionallyWide = 3, + SuperWide = 4, + VeryWide = 5, + Wide = 6, + Normal = 7, + Narrow = 8, + VeryNarrow = 9, + } bAspectRatio157; + + enum class AspectRatio163 : SK_OT_BYTE { + Any = 0, + NoFit = 1, + NoWidth = 2, + ExceptionallyWide = 3, + SuperWide = 4, + VeryWide = 5, + Wide = 6, + Normal = 7, + Narrow = 8, + VeryNarrow = 9, + } bAspectRatio163; + } pictoral; + } data; +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkPanose) == 10, "sizeof_SkPanose_not_10"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkSFNTHeader.h b/gfx/skia/skia/src/sfnt/SkSFNTHeader.h new file mode 100644 index 0000000000..6aa19fe764 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkSFNTHeader.h @@ -0,0 +1,70 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSFNTHeader_DEFINED +#define SkSFNTHeader_DEFINED + +#include "src/base/SkEndian.h" +#include "src/sfnt/SkOTTableTypes.h" + +//All SK_SFNT_ prefixed types should be considered as big endian. +typedef uint16_t SK_SFNT_USHORT; +typedef uint32_t SK_SFNT_ULONG; + +#pragma pack(push, 1) + +struct SkSFNTHeader { + SK_SFNT_ULONG fontType; + struct fontType_WindowsTrueType { + static const SK_OT_CHAR TAG0 = 0; + static const SK_OT_CHAR TAG1 = 1; + static const SK_OT_CHAR TAG2 = 0; + static const SK_OT_CHAR TAG3 = 0; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + }; + struct fontType_MacTrueType { + static const SK_OT_CHAR TAG0 = 't'; + static const SK_OT_CHAR TAG1 = 'r'; + static const SK_OT_CHAR TAG2 = 'u'; + static const SK_OT_CHAR TAG3 = 'e'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + }; + struct fontType_PostScript { + static const SK_OT_CHAR TAG0 = 't'; + static const SK_OT_CHAR TAG1 = 'y'; + static const SK_OT_CHAR TAG2 = 'p'; + static const SK_OT_CHAR TAG3 = '1'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + }; + struct fontType_OpenTypeCFF { + static const SK_OT_CHAR TAG0 = 'O'; + static const SK_OT_CHAR TAG1 = 'T'; + static const SK_OT_CHAR TAG2 = 'T'; + static const SK_OT_CHAR TAG3 = 'O'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + }; + + SK_SFNT_USHORT numTables; + SK_SFNT_USHORT searchRange; + SK_SFNT_USHORT entrySelector; + SK_SFNT_USHORT rangeShift; + + struct TableDirectoryEntry { + SK_SFNT_ULONG tag; + SK_SFNT_ULONG checksum; + SK_SFNT_ULONG offset; //From beginning of header. + SK_SFNT_ULONG logicalLength; + }; //tableDirectoryEntries[numTables] +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkSFNTHeader) == 12, "sizeof_SkSFNTHeader_not_12"); +static_assert(sizeof(SkSFNTHeader::TableDirectoryEntry) == 16, "sizeof_SkSFNTHeader_TableDirectoryEntry_not_16"); + +#endif diff --git a/gfx/skia/skia/src/sfnt/SkTTCFHeader.h b/gfx/skia/skia/src/sfnt/SkTTCFHeader.h new file mode 100644 index 0000000000..63eac7c3e2 --- /dev/null +++ b/gfx/skia/skia/src/sfnt/SkTTCFHeader.h @@ -0,0 +1,57 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkTTCFHeader_DEFINED +#define SkTTCFHeader_DEFINED + +#include "src/sfnt/SkOTTableTypes.h" +#include "src/sfnt/SkSFNTHeader.h" + +#pragma pack(push, 1) + +struct SkTTCFHeader { + SK_SFNT_ULONG ttcTag; + static const SK_OT_CHAR TAG0 = 't'; + static const SK_OT_CHAR TAG1 = 't'; + static const SK_OT_CHAR TAG2 = 'c'; + static const SK_OT_CHAR TAG3 = 'f'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + + SK_OT_Fixed version; + static const SK_OT_Fixed version_1 = SkTEndian_SwapBE32(1 << 16); + static const SK_OT_Fixed version_2 = SkTEndian_SwapBE32(2 << 16); + + SK_OT_ULONG numOffsets; + //SK_OT_ULONG offset[numOffsets] + + struct Version2Ext { + SK_OT_ULONG dsigType; + struct dsigType_None { + static const SK_OT_CHAR TAG0 = 0; + static const SK_OT_CHAR TAG1 = 0; + static const SK_OT_CHAR TAG2 = 0; + static const SK_OT_CHAR TAG3 = 0; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + }; + struct dsigType_Format1 { + static const SK_OT_CHAR TAG0 = 'D'; + static const SK_OT_CHAR TAG1 = 'S'; + static const SK_OT_CHAR TAG2 = 'I'; + static const SK_OT_CHAR TAG3 = 'G'; + static const SK_OT_ULONG TAG = SkOTTableTAG::value; + }; + SK_OT_ULONG dsigLength; //Length of DSIG table (in bytes). + SK_OT_ULONG dsigOffset; //Offset of DSIG table from the beginning of file (in bytes). + };// version2ext (if version == version_2) +}; + +#pragma pack(pop) + + +static_assert(sizeof(SkTTCFHeader) == 12, "sizeof_SkTTCFHeader_not_12"); + +#endif diff --git a/gfx/skia/skia/src/shaders/SkBitmapProcShader.cpp b/gfx/skia/skia/src/shaders/SkBitmapProcShader.cpp new file mode 100644 index 0000000000..2f0b35f3b4 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkBitmapProcShader.cpp @@ -0,0 +1,93 @@ +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/shaders/SkBitmapProcShader.h" + +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBitmapProcState.h" +#include "src/core/SkPaintPriv.h" +#include "src/core/SkXfermodePriv.h" + +class BitmapProcShaderContext : public SkShaderBase::Context { +public: + BitmapProcShaderContext(const SkShaderBase& shader, const SkShaderBase::ContextRec& rec, + SkBitmapProcState* state) + : INHERITED(shader, rec) + , fState(state) + , fFlags(0) + { + if (fState->fPixmap.isOpaque() && (255 == this->getPaintAlpha())) { + fFlags |= SkShaderBase::kOpaqueAlpha_Flag; + } + + auto only_scale_and_translate = [](const SkMatrix& matrix) { + unsigned mask = SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask; + return (matrix.getType() & ~mask) == 0; + }; + + if (1 == fState->fPixmap.height() && only_scale_and_translate(this->getTotalInverse())) { + fFlags |= SkShaderBase::kConstInY32_Flag; + } + } + + uint32_t getFlags() const override { return fFlags; } + + void shadeSpan(int x, int y, SkPMColor dstC[], int count) override { + const SkBitmapProcState& state = *fState; + if (state.getShaderProc32()) { + state.getShaderProc32()(&state, x, y, dstC, count); + return; + } + + const int BUF_MAX = 128; + uint32_t buffer[BUF_MAX]; + SkBitmapProcState::MatrixProc mproc = state.getMatrixProc(); + SkBitmapProcState::SampleProc32 sproc = state.getSampleProc32(); + const int max = state.maxCountForBufferSize(sizeof(buffer[0]) * BUF_MAX); + + SkASSERT(state.fPixmap.addr()); + + for (;;) { + int n = std::min(count, max); + SkASSERT(n > 0 && n < BUF_MAX*2); + mproc(state, buffer, n, x, y); + sproc(state, buffer, n, dstC); + + if ((count -= n) == 0) { + break; + } + SkASSERT(count > 0); + x += n; + dstC += n; + } + } + +private: + SkBitmapProcState* fState; + uint32_t fFlags; + + using INHERITED = SkShaderBase::Context; +}; + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +SkShaderBase::Context* SkBitmapProcLegacyShader::MakeContext( + const SkShaderBase& shader, SkTileMode tmx, SkTileMode tmy, const SkSamplingOptions& sampling, + const SkImage_Base* image, const ContextRec& rec, SkArenaAlloc* alloc) +{ + SkMatrix totalInverse; + // Do this first, so we know the matrix can be inverted. + if (!shader.computeTotalInverse(*rec.fMatrix, rec.fLocalMatrix, &totalInverse)) { + return nullptr; + } + + SkBitmapProcState* state = alloc->make(image, tmx, tmy); + if (!state->setup(totalInverse, rec.fPaintAlpha, sampling)) { + return nullptr; + } + return alloc->make(shader, rec, state); +} diff --git a/gfx/skia/skia/src/shaders/SkBitmapProcShader.h b/gfx/skia/skia/src/shaders/SkBitmapProcShader.h new file mode 100644 index 0000000000..763f304d8b --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkBitmapProcShader.h @@ -0,0 +1,26 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkBitmapProcShader_DEFINED +#define SkBitmapProcShader_DEFINED + +#include "src/core/SkImagePriv.h" +#include "src/shaders/SkShaderBase.h" + +class SkImage_Base; + +class SkBitmapProcLegacyShader : public SkShaderBase { +private: + friend class SkImageShader; + + static Context* MakeContext(const SkShaderBase&, SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions&, const SkImage_Base*, + const ContextRec&, SkArenaAlloc* alloc); + + using INHERITED = SkShaderBase; +}; + +#endif diff --git a/gfx/skia/skia/src/shaders/SkColorFilterShader.cpp b/gfx/skia/skia/src/shaders/SkColorFilterShader.cpp new file mode 100644 index 0000000000..7ff7e8dd50 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkColorFilterShader.cpp @@ -0,0 +1,145 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkShader.h" +#include "include/core/SkString.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkColorFilterBase.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkColorFilterShader.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +SkColorFilterShader::SkColorFilterShader(sk_sp shader, + float alpha, + sk_sp filter) + : fShader(std::move(shader)) + , fFilter(as_CFB_sp(std::move(filter))) + , fAlpha (alpha) +{ + SkASSERT(fShader); + SkASSERT(fFilter); +} + +sk_sp SkColorFilterShader::CreateProc(SkReadBuffer& buffer) { + auto shader = buffer.readShader(); + auto filter = buffer.readColorFilter(); + if (!shader || !filter) { + return nullptr; + } + return sk_make_sp(shader, 1.0f, filter); +} + +bool SkColorFilterShader::isOpaque() const { + return fShader->isOpaque() && fAlpha == 1.0f && as_CFB(fFilter)->isAlphaUnchanged(); +} + +void SkColorFilterShader::flatten(SkWriteBuffer& buffer) const { + buffer.writeFlattenable(fShader.get()); + SkASSERT(fAlpha == 1.0f); // Not exposed in public API SkShader::makeWithColorFilter(). + buffer.writeFlattenable(fFilter.get()); +} + +bool SkColorFilterShader::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + if (!as_SB(fShader)->appendStages(rec, mRec)) { + return false; + } + if (fAlpha != 1.0f) { + rec.fPipeline->append(SkRasterPipelineOp::scale_1_float, rec.fAlloc->make(fAlpha)); + } + if (!fFilter->appendStages(rec, fShader->isOpaque())) { + return false; + } + return true; +} + +skvm::Color SkColorFilterShader::program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + // Run the shader. + skvm::Color c = as_SB(fShader)->program(p, device, local, paint, mRec, dst, uniforms, alloc); + if (!c) { + return {}; + } + // Scale that by alpha. + if (fAlpha != 1.0f) { + skvm::F32 A = p->uniformF(uniforms->pushF(fAlpha)); + c.r *= A; + c.g *= A; + c.b *= A; + c.a *= A; + } + + // Finally run that through the color filter. + return fFilter->program(p,c, dst, uniforms,alloc); +} + +#if defined(SK_GANESH) +///////////////////////////////////////////////////////////////////// + +std::unique_ptr +SkColorFilterShader::asFragmentProcessor(const GrFPArgs& args, const MatrixRec& mRec) const { + auto shaderFP = as_SB(fShader)->asFragmentProcessor(args, mRec); + if (!shaderFP) { + return nullptr; + } + + // TODO I guess, but it shouldn't come up as used today. + SkASSERT(fAlpha == 1.0f); + + auto [success, fp] = fFilter->asFragmentProcessor(std::move(shaderFP), args.fContext, + *args.fDstColorInfo, args.fSurfaceProps); + // If the filter FP could not be created, we still want to return the shader FP, so checking + // success can be omitted here. + return std::move(fp); +} +#endif + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GRAPHITE) + +void SkColorFilterShader::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + ColorFilterShaderBlock::BeginBlock(keyContext, builder, gatherer); + + as_SB(fShader)->addToKey(keyContext, builder, gatherer); + as_CFB(fFilter)->addToKey(keyContext, builder, gatherer); + + builder->endBlock(); +} + +#endif // SK_ENABLE_SKSL + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +sk_sp SkShader::makeWithColorFilter(sk_sp filter) const { + SkShader* base = const_cast(this); + if (!filter) { + return sk_ref_sp(base); + } + return sk_make_sp(sk_ref_sp(base), 1.0f, std::move(filter)); +} diff --git a/gfx/skia/skia/src/shaders/SkColorFilterShader.h b/gfx/skia/skia/src/shaders/SkColorFilterShader.h new file mode 100644 index 0000000000..4cdbea6a45 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkColorFilterShader.h @@ -0,0 +1,53 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkColorFilterShader_DEFINED +#define SkColorFilterShader_DEFINED + +#include "src/core/SkColorFilterBase.h" +#include "src/shaders/SkShaderBase.h" + +class SkArenaAlloc; + +class SkColorFilterShader : public SkShaderBase { +public: + SkColorFilterShader(sk_sp shader, float alpha, sk_sp filter); + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +private: + bool isOpaque() const override; + void flatten(SkWriteBuffer&) const override; + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const override; + + SK_FLATTENABLE_HOOKS(SkColorFilterShader) + + sk_sp fShader; + sk_sp fFilter; + float fAlpha; + + using INHERITED = SkShaderBase; +}; + +#endif diff --git a/gfx/skia/skia/src/shaders/SkColorShader.cpp b/gfx/skia/skia/src/shaders/SkColorShader.cpp new file mode 100644 index 0000000000..149b155d62 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkColorShader.cpp @@ -0,0 +1,275 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColorSpace.h" +#include "include/core/SkFlattenable.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkUtils.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkShaderBase.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +/** \class SkColorShader + A Shader that represents a single color. In general, this effect can be + accomplished by just using the color field on the paint, but if an + actual shader object is needed, this provides that feature. +*/ +class SkColorShader : public SkShaderBase { +public: + /** Create a ColorShader that ignores the color in the paint, and uses the + specified color. Note: like all shaders, at draw time the paint's alpha + will be respected, and is applied to the specified color. + */ + explicit SkColorShader(SkColor c); + + bool isOpaque() const override; + bool isConstant() const override { return true; } + + GradientType asGradient(GradientInfo* info, SkMatrix* localMatrix) const override; + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +private: + friend void ::SkRegisterColorShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkColorShader) + + void flatten(SkWriteBuffer&) const override; + + bool onAsLuminanceColor(SkColor* lum) const override { + *lum = fColor; + return true; + } + + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const override; + + SkColor fColor; +}; + +class SkColor4Shader : public SkShaderBase { +public: + SkColor4Shader(const SkColor4f&, sk_sp); + + bool isOpaque() const override { return fColor.isOpaque(); } + bool isConstant() const override { return true; } + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +private: + friend void ::SkRegisterColor4ShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkColor4Shader) + + void flatten(SkWriteBuffer&) const override; + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const override; + + sk_sp fColorSpace; + const SkColor4f fColor; +}; + +SkColorShader::SkColorShader(SkColor c) : fColor(c) {} + +bool SkColorShader::isOpaque() const { + return SkColorGetA(fColor) == 255; +} + +sk_sp SkColorShader::CreateProc(SkReadBuffer& buffer) { + return sk_make_sp(buffer.readColor()); +} + +void SkColorShader::flatten(SkWriteBuffer& buffer) const { + buffer.writeColor(fColor); +} + +SkShaderBase::GradientType SkColorShader::asGradient(GradientInfo* info, + SkMatrix* localMatrix) const { + if (info) { + if (info->fColors && info->fColorCount >= 1) { + info->fColors[0] = fColor; + } + info->fColorCount = 1; + info->fTileMode = SkTileMode::kRepeat; + } + if (localMatrix) { + *localMatrix = SkMatrix::I(); + } + return GradientType::kColor; +} + +SkColor4Shader::SkColor4Shader(const SkColor4f& color, sk_sp space) + : fColorSpace(std::move(space)) + , fColor({color.fR, color.fG, color.fB, SkTPin(color.fA, 0.0f, 1.0f)}) +{} + +sk_sp SkColor4Shader::CreateProc(SkReadBuffer& buffer) { + SkColor4f color; + sk_sp colorSpace; + buffer.readColor4f(&color); + if (buffer.readBool()) { + sk_sp data = buffer.readByteArrayAsData(); + colorSpace = data ? SkColorSpace::Deserialize(data->data(), data->size()) : nullptr; + } + return SkShaders::Color(color, std::move(colorSpace)); +} + +void SkColor4Shader::flatten(SkWriteBuffer& buffer) const { + buffer.writeColor4f(fColor); + sk_sp colorSpaceData = fColorSpace ? fColorSpace->serialize() : nullptr; + if (colorSpaceData) { + buffer.writeBool(true); + buffer.writeDataAsByteArray(colorSpaceData.get()); + } else { + buffer.writeBool(false); + } +} + +bool SkColorShader::appendStages(const SkStageRec& rec, const MatrixRec&) const { + SkColor4f color = SkColor4f::FromColor(fColor); + SkColorSpaceXformSteps(sk_srgb_singleton(), kUnpremul_SkAlphaType, + rec.fDstCS, kUnpremul_SkAlphaType).apply(color.vec()); + rec.fPipeline->append_constant_color(rec.fAlloc, color.premul().vec()); + return true; +} + +bool SkColor4Shader::appendStages(const SkStageRec& rec, const MatrixRec&) const { + SkColor4f color = fColor; + SkColorSpaceXformSteps(fColorSpace.get(), kUnpremul_SkAlphaType, + rec.fDstCS, kUnpremul_SkAlphaType).apply(color.vec()); + rec.fPipeline->append_constant_color(rec.fAlloc, color.premul().vec()); + return true; +} + +skvm::Color SkColorShader::program(skvm::Builder* p, + skvm::Coord /*device*/, + skvm::Coord /*local*/, + skvm::Color /*paint*/, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const { + SkColor4f color = SkColor4f::FromColor(fColor); + SkColorSpaceXformSteps(sk_srgb_singleton(), kUnpremul_SkAlphaType, + dst.colorSpace(), kPremul_SkAlphaType).apply(color.vec()); + return p->uniformColor(color, uniforms); +} +skvm::Color SkColor4Shader::program(skvm::Builder* p, + skvm::Coord /*device*/, + skvm::Coord /*local*/, + skvm::Color /*paint*/, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const { + SkColor4f color = fColor; + SkColorSpaceXformSteps(fColorSpace.get(), kUnpremul_SkAlphaType, + dst.colorSpace(), kPremul_SkAlphaType).apply(color.vec()); + return p->uniformColor(color, uniforms); +} + +#if defined(SK_GANESH) + +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrColorSpaceXform.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/SkGr.h" + +std::unique_ptr SkColorShader::asFragmentProcessor(const GrFPArgs& args, + const MatrixRec&) const { + return GrFragmentProcessor::MakeColor(SkColorToPMColor4f(fColor, *args.fDstColorInfo)); +} + +std::unique_ptr SkColor4Shader::asFragmentProcessor(const GrFPArgs& args, + const MatrixRec&) const { + SkColorSpaceXformSteps steps{ fColorSpace.get(), kUnpremul_SkAlphaType, + args.fDstColorInfo->colorSpace(), kUnpremul_SkAlphaType }; + SkColor4f color = fColor; + steps.apply(color.vec()); + return GrFragmentProcessor::MakeColor(color.premul()); +} + +#endif + +#if defined(SK_GRAPHITE) +void SkColorShader::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, + SkColor4f::FromColor(fColor).premul()); + builder->endBlock(); +} + +void SkColor4Shader::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, fColor.premul()); + builder->endBlock(); +} +#endif + +sk_sp SkShaders::Color(SkColor color) { return sk_make_sp(color); } + +sk_sp SkShaders::Color(const SkColor4f& color, sk_sp space) { + if (!SkScalarsAreFinite(color.vec(), 4)) { + return nullptr; + } + return sk_make_sp(color, std::move(space)); +} + +void SkRegisterColor4ShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkColor4Shader); +} + +void SkRegisterColorShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkColorShader); +} diff --git a/gfx/skia/skia/src/shaders/SkComposeShader.cpp b/gfx/skia/skia/src/shaders/SkComposeShader.cpp new file mode 100644 index 0000000000..ee9a1ed1a9 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkComposeShader.cpp @@ -0,0 +1,243 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkColorFilter.h" +#include "include/core/SkFlattenable.h" +#include "include/core/SkString.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkColorData.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkBlendModePriv.h" +#include "src/core/SkBlenderBase.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkShaderBase.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/Blend.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +class SkShader_Blend final : public SkShaderBase { +public: + SkShader_Blend(SkBlendMode mode, sk_sp dst, sk_sp src) + : fDst(std::move(dst)) + , fSrc(std::move(src)) + , fMode(mode) {} + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif + +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +protected: + SkShader_Blend(SkReadBuffer&); + void flatten(SkWriteBuffer&) const override; + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms*, + SkArenaAlloc*) const override; + +private: + friend void ::SkRegisterComposeShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkShader_Blend) + + sk_sp fDst; + sk_sp fSrc; + SkBlendMode fMode; + + using INHERITED = SkShaderBase; +}; + +sk_sp SkShader_Blend::CreateProc(SkReadBuffer& buffer) { + sk_sp dst(buffer.readShader()); + sk_sp src(buffer.readShader()); + if (!buffer.validate(dst && src)) { + return nullptr; + } + + unsigned mode = buffer.read32(); + + if (mode == kCustom_SkBlendMode) { + sk_sp blender = buffer.readBlender(); + if (buffer.validate(blender != nullptr)) { + return SkShaders::Blend(std::move(blender), std::move(dst), std::move(src)); + } + } else { + if (buffer.validate(mode <= (unsigned)SkBlendMode::kLastMode)) { + return SkShaders::Blend(static_cast(mode), std::move(dst), std::move(src)); + } + } + return nullptr; +} + +void SkShader_Blend::flatten(SkWriteBuffer& buffer) const { + buffer.writeFlattenable(fDst.get()); + buffer.writeFlattenable(fSrc.get()); + buffer.write32((int)fMode); +} + +// Returns the output of e0, and leaves the output of e1 in r,g,b,a +static float* append_two_shaders(const SkStageRec& rec, + const SkShaderBase::MatrixRec& mRec, + SkShader* s0, + SkShader* s1) { + struct Storage { + float fCoords[2 * SkRasterPipeline_kMaxStride]; + float fRes0 [4 * SkRasterPipeline_kMaxStride]; + }; + auto storage = rec.fAlloc->make(); + + // Note we cannot simply apply mRec here and then unconditionally store the coordinates. When + // building for Android Framework it would interrupt the backwards local matrix concatenation if + // mRec had a pending local matrix and either of the children also had a local matrix. + // b/256873449 + if (mRec.rasterPipelineCoordsAreSeeded()) { + rec.fPipeline->append(SkRasterPipelineOp::store_src_rg, storage->fCoords); + } + if (!as_SB(s0)->appendStages(rec, mRec)) { + return nullptr; + } + rec.fPipeline->append(SkRasterPipelineOp::store_src, storage->fRes0); + + if (mRec.rasterPipelineCoordsAreSeeded()) { + rec.fPipeline->append(SkRasterPipelineOp::load_src_rg, storage->fCoords); + } + if (!as_SB(s1)->appendStages(rec, mRec)) { + return nullptr; + } + return storage->fRes0; +} + +bool SkShader_Blend::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + float* res0 = append_two_shaders(rec, mRec, fDst.get(), fSrc.get()); + if (!res0) { + return false; + } + + rec.fPipeline->append(SkRasterPipelineOp::load_dst, res0); + SkBlendMode_AppendStages(fMode, rec.fPipeline); + return true; +} + +skvm::Color SkShader_Blend::program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& cinfo, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + skvm::Color d,s; + if ((d = as_SB(fDst)->program(p, device, local, paint, mRec, cinfo, uniforms, alloc)) && + (s = as_SB(fSrc)->program(p, device, local, paint, mRec, cinfo, uniforms, alloc))) { + return p->blend(fMode, s,d); + } + return {}; +} + +#if defined(SK_GANESH) + +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrBlendFragmentProcessor.h" + +std::unique_ptr +SkShader_Blend::asFragmentProcessor(const GrFPArgs& args, const MatrixRec& mRec) const { + auto fpA = as_SB(fDst)->asFragmentProcessor(args, mRec); + auto fpB = as_SB(fSrc)->asFragmentProcessor(args, mRec); + if (!fpA || !fpB) { + // This is unexpected. Both src and dst shaders should be valid. Just fail. + return nullptr; + } + return GrBlendFragmentProcessor::Make(std::move(fpB), std::move(fpA), fMode); +} +#endif + +#if defined(SK_GRAPHITE) +void SkShader_Blend::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SkSpan porterDuffConstants = skgpu::GetPorterDuffBlendConstants(fMode); + if (!porterDuffConstants.empty()) { + PorterDuffBlendShaderBlock::BeginBlock(keyContext, builder, gatherer, + {porterDuffConstants}); + } else { + BlendShaderBlock::BeginBlock(keyContext, builder, gatherer, {fMode}); + } + + as_SB(fDst)->addToKey(keyContext, builder, gatherer); + as_SB(fSrc)->addToKey(keyContext, builder, gatherer); + + builder->endBlock(); +} +#endif + +sk_sp SkShaders::Blend(SkBlendMode mode, sk_sp dst, sk_sp src) { + if (!src || !dst) { + return nullptr; + } + switch (mode) { + case SkBlendMode::kClear: return Color(0); + case SkBlendMode::kDst: return dst; + case SkBlendMode::kSrc: return src; + default: break; + } + return sk_sp(new SkShader_Blend(mode, std::move(dst), std::move(src))); +} + +sk_sp SkShaders::Blend(sk_sp blender, + sk_sp dst, + sk_sp src) { + if (!src || !dst) { + return nullptr; + } + if (!blender) { + return SkShaders::Blend(SkBlendMode::kSrcOver, std::move(dst), std::move(src)); + } + if (std::optional mode = as_BB(blender)->asBlendMode()) { + return sk_make_sp(mode.value(), std::move(dst), std::move(src)); + } + +#ifdef SK_ENABLE_SKSL + // This isn't a built-in blend mode; we might as well use a runtime effect to evaluate it. + static SkRuntimeEffect* sBlendEffect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform blender b;" + "uniform shader d, s;" + "half4 main(float2 xy) {" + "return b.eval(s.eval(xy), d.eval(xy));" + "}" + ); + SkRuntimeEffect::ChildPtr children[] = {std::move(blender), std::move(dst), std::move(src)}; + return sBlendEffect->makeShader(/*uniforms=*/{}, children); +#else + // We need SkSL to render this blend. + return nullptr; +#endif +} + +void SkRegisterComposeShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkShader_Blend); +} diff --git a/gfx/skia/skia/src/shaders/SkCoordClampShader.cpp b/gfx/skia/skia/src/shaders/SkCoordClampShader.cpp new file mode 100644 index 0000000000..f65e7d9f10 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkCoordClampShader.cpp @@ -0,0 +1,177 @@ +/* + * Copyright 2023 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkFlattenable.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkShaderBase.h" + +#if defined(SK_GANESH) +#include "include/effects/SkRuntimeEffect.h" +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif // SK_GRAPHITE + +class SkShader_CoordClamp final : public SkShaderBase { +public: + SkShader_CoordClamp(sk_sp shader, const SkRect& subset) + : fShader(std::move(shader)), fSubset(subset) {} + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +protected: + SkShader_CoordClamp(SkReadBuffer&); + void flatten(SkWriteBuffer&) const override; + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms*, + SkArenaAlloc*) const override; + +private: + friend void ::SkRegisterCoordClampShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkShader_CoordClamp) + + sk_sp fShader; + SkRect fSubset; +}; + +sk_sp SkShader_CoordClamp::CreateProc(SkReadBuffer& buffer) { + sk_sp shader(buffer.readShader()); + SkRect subset = buffer.readRect(); + if (!buffer.validate(SkToBool(shader))) { + return nullptr; + } + return SkShaders::CoordClamp(std::move(shader), subset); +} + +void SkShader_CoordClamp::flatten(SkWriteBuffer& buffer) const { + buffer.writeFlattenable(fShader.get()); + buffer.writeRect(fSubset); +} + +bool SkShader_CoordClamp::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + std::optional childMRec = mRec.apply(rec); + if (!childMRec.has_value()) { + return false; + } + // Strictly speaking, childMRec's total matrix is not valid. It is only valid inside the subset + // rectangle. However, we don't mark it as such because we want the "total matrix is valid" + // behavior in SkImageShader for filtering. + auto clampCtx = rec.fAlloc->make(); + *clampCtx = {fSubset.fLeft, fSubset.fTop, fSubset.fRight, fSubset.fBottom}; + rec.fPipeline->append(SkRasterPipelineOp::clamp_x_and_y, clampCtx); + return as_SB(fShader)->appendStages(rec, *childMRec); +} + +skvm::Color SkShader_CoordClamp::program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& cinfo, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + std::optional childMRec = mRec.apply(p, &local, uniforms); + if (!childMRec.has_value()) { + return {}; + } + // See comment in appendStages about not marking childMRec with an invalid total matrix. + + auto l = uniforms->pushF(fSubset.left()); + auto t = uniforms->pushF(fSubset.top()); + auto r = uniforms->pushF(fSubset.right()); + auto b = uniforms->pushF(fSubset.bottom()); + + local.x = p->clamp(local.x, p->uniformF(l), p->uniformF(r)); + local.y = p->clamp(local.y, p->uniformF(t), p->uniformF(b)); + + return as_SB(fShader)->program(p, device, local, paint, *childMRec, cinfo, uniforms, alloc); +} + +#if defined(SK_GANESH) +std::unique_ptr SkShader_CoordClamp::asFragmentProcessor( + const GrFPArgs& args, const MatrixRec& mRec) const { + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform shader c;" + "uniform float4 s;" + "half4 main(float2 p) {" + "return c.eval(clamp(p, s.LT, s.RB));" + "}"); + + auto fp = as_SB(fShader)->asFragmentProcessor(args, mRec.applied()); + if (!fp) { + return nullptr; + } + + GrSkSLFP::OptFlags flags = GrSkSLFP::OptFlags::kNone; + if (fp->compatibleWithCoverageAsAlpha()) { + flags |= GrSkSLFP::OptFlags::kCompatibleWithCoverageAsAlpha; + } + if (fp->preservesOpaqueInput()) { + flags |= GrSkSLFP::OptFlags::kPreservesOpaqueInput; + } + fp = GrSkSLFP::Make(effect, + "clamp_fp", + /*inputFP=*/nullptr, + flags, + "c", std::move(fp), + "s", fSubset); + bool success; + std::tie(success, fp) = mRec.apply(std::move(fp)); + return success ? std::move(fp) : nullptr; +} +#endif // defined(SK_GANESH) + +#if defined(SK_GRAPHITE) +void SkShader_CoordClamp::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + CoordClampShaderBlock::CoordClampData data(fSubset); + + CoordClampShaderBlock::BeginBlock(keyContext, builder, gatherer, &data); + as_SB(fShader)->addToKey(keyContext, builder, gatherer); + builder->endBlock(); +} +#endif // SK_GRAPHITE + +void SkRegisterCoordClampShaderFlattenable() { SK_REGISTER_FLATTENABLE(SkShader_CoordClamp); } + +sk_sp SkShaders::CoordClamp(sk_sp shader, const SkRect& subset) { + if (!shader) { + return nullptr; + } + if (!subset.isSorted()) { + return nullptr; + } + return sk_make_sp(std::move(shader), subset); +} diff --git a/gfx/skia/skia/src/shaders/SkEmptyShader.cpp b/gfx/skia/skia/src/shaders/SkEmptyShader.cpp new file mode 100644 index 0000000000..94040338a8 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkEmptyShader.cpp @@ -0,0 +1,65 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/shaders/SkShaderBase.h" + +#include "include/core/SkFlattenable.h" +#include "src/core/SkVM.h" + +/** + * \class SkEmptyShader + * A Shader that always draws nothing. Its createContext always returns nullptr. + */ +class SkEmptyShader : public SkShaderBase { +public: + SkEmptyShader() {} + +protected: + void flatten(SkWriteBuffer& buffer) const override { + // Do nothing. + // We just don't want to fall through to SkShader::flatten(), + // which will write data we don't care to serialize or decode. + } + + bool appendStages(const SkStageRec&, const MatrixRec&) const override { return false; } + + skvm::Color program(skvm::Builder*, + skvm::Coord, + skvm::Coord, + skvm::Color, + const MatrixRec&, + const SkColorInfo&, + skvm::Uniforms*, + SkArenaAlloc*) const override; + +private: + friend void ::SkRegisterEmptyShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkEmptyShader) + + using INHERITED = SkShaderBase; +}; + +skvm::Color SkEmptyShader::program(skvm::Builder*, + skvm::Coord, + skvm::Coord, + skvm::Color, + const MatrixRec&, + const SkColorInfo&, + skvm::Uniforms*, + SkArenaAlloc*) const { + return {}; // signal failure +} + +sk_sp SkEmptyShader::CreateProc(SkReadBuffer&) { + return SkShaders::Empty(); +} + +sk_sp SkShaders::Empty() { return sk_make_sp(); } + +void SkRegisterEmptyShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkEmptyShader); +} diff --git a/gfx/skia/skia/src/shaders/SkGainmapShader.cpp b/gfx/skia/skia/src/shaders/SkGainmapShader.cpp new file mode 100644 index 0000000000..1654709c2c --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkGainmapShader.cpp @@ -0,0 +1,167 @@ +/* + * Copyright 2023 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkGainmapShader.h" + +#include "include/core/SkColorSpace.h" +#include "include/core/SkImage.h" +#include "include/core/SkShader.h" +#include "include/effects/SkRuntimeEffect.h" +#include "include/private/SkGainmapInfo.h" +#include "src/core/SkColorFilterPriv.h" +#include "src/core/SkImageInfoPriv.h" + +#ifdef SK_ENABLE_SKSL +static constexpr char gGainmapSKSL[] = + "uniform shader base;" + "uniform shader gainmap;" + "uniform half4 logRatioMin;" + "uniform half4 logRatioMax;" + "uniform half4 gainmapGamma;" + "uniform half4 epsilonSdr;" + "uniform half4 epsilonHdr;" + "uniform half W;" + "uniform int gainmapIsAlpha;" + "uniform int gainmapIsRed;" + "uniform int singleChannel;" + "uniform int noGamma;" + "" + "half4 main(float2 coord) {" + " half4 S = base.eval(coord);" + " half4 G = gainmap.eval(coord);" + " if (gainmapIsAlpha == 1) {" + " G = half4(G.a, G.a, G.a, 1.0);" + " }" + " if (gainmapIsRed == 1) {" + " G = half4(G.r, G.r, G.r, 1.0);" + " }" + " if (singleChannel == 1) {" + " half L;" + " if (noGamma == 1) {" + " L = mix(logRatioMin.r, logRatioMax.r, G.r);" + " } else {" + " L = mix(logRatioMin.r, logRatioMax.r, pow(G.r, gainmapGamma.r));" + " }" + " half3 H = (S.rgb + epsilonSdr.rgb) * exp(L * W) - epsilonHdr.rgb;" + " return half4(H.r, H.g, H.b, S.a);" + " } else {" + " half3 L;" + " if (noGamma == 1) {" + " L = mix(logRatioMin.rgb, logRatioMax.rgb, G.rgb);" + " } else {" + " L = mix(logRatioMin.rgb, logRatioMax.rgb, pow(G.rgb, gainmapGamma.rgb));" + " }" + " half3 H = (S.rgb + epsilonSdr.rgb) * exp(L * W) - epsilonHdr.rgb;" + " return half4(H.r, H.g, H.b, S.a);" + " }" + "}"; + +static sk_sp gainmap_apply_effect() { + static const SkRuntimeEffect* effect = + SkRuntimeEffect::MakeForShader(SkString(gGainmapSKSL), {}).effect.release(); + SkASSERT(effect); + return sk_ref_sp(effect); +} + +static bool all_channels_equal(const SkColor4f& c) { + return c.fR == c.fG && c.fR == c.fB; +} +#endif // SK_ENABLE_SKSL + +sk_sp SkGainmapShader::Make(const sk_sp& baseImage, + const SkRect& baseRect, + const SkSamplingOptions& baseSamplingOptions, + const sk_sp& gainmapImage, + const SkRect& gainmapRect, + const SkSamplingOptions& gainmapSamplingOptions, + const SkGainmapInfo& gainmapInfo, + const SkRect& dstRect, + float dstHdrRatio, + sk_sp dstColorSpace) { +#ifdef SK_ENABLE_SKSL + sk_sp baseColorSpace = + baseImage->colorSpace() ? baseImage->refColorSpace() : SkColorSpace::MakeSRGB(); + + // Determine the color space in which the gainmap math is to be applied. + sk_sp gainmapMathColorSpace = baseColorSpace->makeLinearGamma(); + if (!dstColorSpace) { + dstColorSpace = SkColorSpace::MakeSRGB(); + } + + // Create a color filter to transform from the base image's color space to the color space in + // which the gainmap is to be applied. + auto colorXformSdrToGainmap = + SkColorFilterPriv::MakeColorSpaceXform(baseColorSpace, gainmapMathColorSpace); + + // Create a color filter to transform from the color space in which the gainmap is applied to + // the destination color space. + auto colorXformGainmapToDst = + SkColorFilterPriv::MakeColorSpaceXform(gainmapMathColorSpace, dstColorSpace); + + // The base image shader will convert into the color space in which the gainmap is applied. + const SkMatrix baseRectToDstRect = SkMatrix::RectToRect(baseRect, dstRect); + auto baseImageShader = baseImage->makeRawShader(baseSamplingOptions, &baseRectToDstRect) + ->makeWithColorFilter(colorXformSdrToGainmap); + + // The gainmap image shader will ignore any color space that the gainmap has. + const SkMatrix gainmapRectToDstRect = SkMatrix::RectToRect(gainmapRect, dstRect); + auto gainmapImageShader = + gainmapImage->makeRawShader(gainmapSamplingOptions, &gainmapRectToDstRect); + + // Create the shader to apply the gainmap. + sk_sp gainmapMathShader; + { + SkRuntimeShaderBuilder builder(gainmap_apply_effect()); + const SkColor4f logRatioMin({sk_float_log(gainmapInfo.fGainmapRatioMin.fR), + sk_float_log(gainmapInfo.fGainmapRatioMin.fG), + sk_float_log(gainmapInfo.fGainmapRatioMin.fB), + 1.f}); + const SkColor4f logRatioMax({sk_float_log(gainmapInfo.fGainmapRatioMax.fR), + sk_float_log(gainmapInfo.fGainmapRatioMax.fG), + sk_float_log(gainmapInfo.fGainmapRatioMax.fB), + 1.f}); + const float Wunclamped = + (sk_float_log(dstHdrRatio) - sk_float_log(gainmapInfo.fDisplayRatioSdr)) / + (sk_float_log(gainmapInfo.fDisplayRatioHdr) - + sk_float_log(gainmapInfo.fDisplayRatioSdr)); + const float W = std::max(std::min(Wunclamped, 1.f), 0.f); + const int noGamma = + gainmapInfo.fGainmapGamma.fR == 1.f && + gainmapInfo.fGainmapGamma.fG == 1.f && + gainmapInfo.fGainmapGamma.fB == 1.f; + const uint32_t colorTypeFlags = SkColorTypeChannelFlags(gainmapImage->colorType()); + const int gainmapIsAlpha = colorTypeFlags == kAlpha_SkColorChannelFlag; + const int gainmapIsRed = colorTypeFlags == kRed_SkColorChannelFlag; + const int singleChannel = all_channels_equal(gainmapInfo.fGainmapGamma) && + all_channels_equal(gainmapInfo.fGainmapRatioMin) && + all_channels_equal(gainmapInfo.fGainmapRatioMax) && + (colorTypeFlags == kGray_SkColorChannelFlag || + colorTypeFlags == kAlpha_SkColorChannelFlag || + colorTypeFlags == kRed_SkColorChannelFlag); + builder.child("base") = baseImageShader; + builder.child("gainmap") = gainmapImageShader; + builder.uniform("logRatioMin") = logRatioMin; + builder.uniform("logRatioMax") = logRatioMax; + builder.uniform("gainmapGamma") = gainmapInfo.fGainmapGamma; + builder.uniform("epsilonSdr") = gainmapInfo.fEpsilonSdr; + builder.uniform("epsilonHdr") = gainmapInfo.fEpsilonHdr; + builder.uniform("noGamma") = noGamma; + builder.uniform("singleChannel") = singleChannel; + builder.uniform("gainmapIsAlpha") = gainmapIsAlpha; + builder.uniform("gainmapIsRed") = gainmapIsRed; + builder.uniform("W") = W; + gainmapMathShader = builder.makeShader(); + SkASSERT(gainmapMathShader); + } + + // Return a shader that will apply the gainmap and then convert to the destination color space. + return gainmapMathShader->makeWithColorFilter(colorXformGainmapToDst); +#else + // This shader is currently only implemented using SkSL. + return nullptr; +#endif +} diff --git a/gfx/skia/skia/src/shaders/SkImageShader.cpp b/gfx/skia/skia/src/shaders/SkImageShader.cpp new file mode 100644 index 0000000000..7e4d520f37 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkImageShader.cpp @@ -0,0 +1,1142 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/shaders/SkImageShader.h" + +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkMipmapAccessor.h" +#include "src/core/SkOpts.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" +#include "src/image/SkImage_Base.h" +#include "src/shaders/SkBitmapProcShader.h" +#include "src/shaders/SkLocalMatrixShader.h" +#include "src/shaders/SkTransformShader.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/ImageUtils.h" +#include "src/gpu/graphite/Image_Graphite.h" +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/Log.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#include "src/gpu/graphite/ReadSwizzle.h" +#include "src/gpu/graphite/TextureProxyView.h" + + +static skgpu::graphite::ReadSwizzle swizzle_class_to_read_enum(const skgpu::Swizzle& swizzle) { + if (swizzle == skgpu::Swizzle::RGBA()) { + return skgpu::graphite::ReadSwizzle::kRGBA; + } else if (swizzle == skgpu::Swizzle::RGB1()) { + return skgpu::graphite::ReadSwizzle::kRGB1; + } else if (swizzle == skgpu::Swizzle("rrrr")) { + return skgpu::graphite::ReadSwizzle::kRRRR; + } else if (swizzle == skgpu::Swizzle("rrr1")) { + return skgpu::graphite::ReadSwizzle::kRRR1; + } else if (swizzle == skgpu::Swizzle::BGRA()) { + return skgpu::graphite::ReadSwizzle::kBGRA; + } else { + SKGPU_LOG_W("%s is an unsupported read swizzle. Defaulting to RGBA.\n", + swizzle.asString().data()); + return skgpu::graphite::ReadSwizzle::kRGBA; + } +} +#endif + +SkM44 SkImageShader::CubicResamplerMatrix(float B, float C) { +#if 0 + constexpr SkM44 kMitchell = SkM44( 1.f/18.f, -9.f/18.f, 15.f/18.f, -7.f/18.f, + 16.f/18.f, 0.f/18.f, -36.f/18.f, 21.f/18.f, + 1.f/18.f, 9.f/18.f, 27.f/18.f, -21.f/18.f, + 0.f/18.f, 0.f/18.f, -6.f/18.f, 7.f/18.f); + + constexpr SkM44 kCatmull = SkM44(0.0f, -0.5f, 1.0f, -0.5f, + 1.0f, 0.0f, -2.5f, 1.5f, + 0.0f, 0.5f, 2.0f, -1.5f, + 0.0f, 0.0f, -0.5f, 0.5f); + + if (B == 1.0f/3 && C == 1.0f/3) { + return kMitchell; + } + if (B == 0 && C == 0.5f) { + return kCatmull; + } +#endif + return SkM44( (1.f/6)*B, -(3.f/6)*B - C, (3.f/6)*B + 2*C, - (1.f/6)*B - C, + 1 - (2.f/6)*B, 0, -3 + (12.f/6)*B + C, 2 - (9.f/6)*B - C, + (1.f/6)*B, (3.f/6)*B + C, 3 - (15.f/6)*B - 2*C, -2 + (9.f/6)*B + C, + 0, 0, -C, (1.f/6)*B + C); +} + +/** + * We are faster in clamp, so always use that tiling when we can. + */ +static SkTileMode optimize(SkTileMode tm, int dimension) { + SkASSERT(dimension > 0); +#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK + // need to update frameworks/base/libs/hwui/tests/unit/SkiaBehaviorTests.cpp:55 to allow + // for transforming to clamp. + return tm; +#else + // mirror and repeat on a 1px axis are the same as clamping, but decal will still transition to + // transparent black. + return (tm != SkTileMode::kDecal && dimension == 1) ? SkTileMode::kClamp : tm; +#endif +} + +// TODO: currently this only *always* used in asFragmentProcessor(), which is excluded on no-gpu +// builds. No-gpu builds only use needs_subset() in asserts, so release+no-gpu doesn't use it, which +// can cause builds to fail if unused warnings are treated as errors. +[[maybe_unused]] static bool needs_subset(SkImage* img, const SkRect& subset) { + return subset != SkRect::Make(img->dimensions()); +} + +SkImageShader::SkImageShader(sk_sp img, + const SkRect& subset, + SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + bool raw, + bool clampAsIfUnpremul) + : fImage(std::move(img)) + , fSampling(sampling) + , fTileModeX(optimize(tmx, fImage->width())) + , fTileModeY(optimize(tmy, fImage->height())) + , fSubset(subset) + , fRaw(raw) + , fClampAsIfUnpremul(clampAsIfUnpremul) { + // These options should never appear together: + SkASSERT(!fRaw || !fClampAsIfUnpremul); + + // Bicubic filtering of raw image shaders would add a surprising clamp - so we don't support it + SkASSERT(!fRaw || !fSampling.useCubic); +} + +// just used for legacy-unflattening +enum class LegacyFilterEnum { + kNone, + kLow, + kMedium, + kHigh, + // this is the special value for backward compatibility + kInheritFromPaint, + // this signals we should use the new SkFilterOptions + kUseFilterOptions, + // use cubic and ignore FilterOptions + kUseCubicResampler, + + kLast = kUseCubicResampler, +}; + +// fClampAsIfUnpremul is always false when constructed through public APIs, +// so there's no need to read or write it here. + +sk_sp SkImageShader::CreateProc(SkReadBuffer& buffer) { + auto tmx = buffer.read32LE(SkTileMode::kLastTileMode); + auto tmy = buffer.read32LE(SkTileMode::kLastTileMode); + + SkSamplingOptions sampling; + bool readSampling = true; + if (buffer.isVersionLT(SkPicturePriv::kNoFilterQualityShaders_Version) && + !buffer.readBool() /* legacy has_sampling */) + { + readSampling = false; + // we just default to Nearest in sampling + } + if (readSampling) { + sampling = buffer.readSampling(); + } + + SkMatrix localMatrix; + if (buffer.isVersionLT(SkPicturePriv::Version::kNoShaderLocalMatrix)) { + buffer.readMatrix(&localMatrix); + } + sk_sp img = buffer.readImage(); + if (!img) { + return nullptr; + } + + bool raw = buffer.isVersionLT(SkPicturePriv::Version::kRawImageShaders) ? false + : buffer.readBool(); + + // TODO(skbug.com/12784): Subset is not serialized yet; it's only used by special images so it + // will never be written to an SKP. + + return raw ? SkImageShader::MakeRaw(std::move(img), tmx, tmy, sampling, &localMatrix) + : SkImageShader::Make(std::move(img), tmx, tmy, sampling, &localMatrix); +} + +void SkImageShader::flatten(SkWriteBuffer& buffer) const { + buffer.writeUInt((unsigned)fTileModeX); + buffer.writeUInt((unsigned)fTileModeY); + + buffer.writeSampling(fSampling); + + buffer.writeImage(fImage.get()); + SkASSERT(fClampAsIfUnpremul == false); + + // TODO(skbug.com/12784): Subset is not serialized yet; it's only used by special images so it + // will never be written to an SKP. + SkASSERT(!needs_subset(fImage.get(), fSubset)); + + buffer.writeBool(fRaw); +} + +bool SkImageShader::isOpaque() const { + return fImage->isOpaque() && + fTileModeX != SkTileMode::kDecal && fTileModeY != SkTileMode::kDecal; +} + +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT + +static bool legacy_shader_can_handle(const SkMatrix& inv) { + SkASSERT(!inv.hasPerspective()); + + // Scale+translate methods are always present, but affine might not be. + if (!SkOpts::S32_alpha_D32_filter_DXDY && !inv.isScaleTranslate()) { + return false; + } + + // legacy code uses SkFixed 32.32, so ensure the inverse doesn't map device coordinates + // out of range. + const SkScalar max_dev_coord = 32767.0f; + const SkRect src = inv.mapRect(SkRect::MakeWH(max_dev_coord, max_dev_coord)); + + // take 1/4 of max signed 32bits so we have room to subtract local values + const SkScalar max_fixed32dot32 = float(SK_MaxS32) * 0.25f; + if (!SkRect::MakeLTRB(-max_fixed32dot32, -max_fixed32dot32, + +max_fixed32dot32, +max_fixed32dot32).contains(src)) { + return false; + } + + // legacy shader impl should be able to handle these matrices + return true; +} + +SkShaderBase::Context* SkImageShader::onMakeContext(const ContextRec& rec, + SkArenaAlloc* alloc) const { + SkASSERT(!needs_subset(fImage.get(), fSubset)); // TODO(skbug.com/12784) + if (fImage->alphaType() == kUnpremul_SkAlphaType) { + return nullptr; + } + if (fImage->colorType() != kN32_SkColorType) { + return nullptr; + } + if (fTileModeX != fTileModeY) { + return nullptr; + } + if (fTileModeX == SkTileMode::kDecal || fTileModeY == SkTileMode::kDecal) { + return nullptr; + } + + SkSamplingOptions sampling = fSampling; + if (sampling.isAniso()) { + sampling = SkSamplingPriv::AnisoFallback(fImage->hasMipmaps()); + } + + auto supported = [](const SkSamplingOptions& sampling) { + const std::tuple supported[] = { + {SkFilterMode::kNearest, SkMipmapMode::kNone}, // legacy None + {SkFilterMode::kLinear, SkMipmapMode::kNone}, // legacy Low + {SkFilterMode::kLinear, SkMipmapMode::kNearest}, // legacy Medium + }; + for (auto [f, m] : supported) { + if (sampling.filter == f && sampling.mipmap == m) { + return true; + } + } + return false; + }; + if (sampling.useCubic || !supported(sampling)) { + return nullptr; + } + + // SkBitmapProcShader stores bitmap coordinates in a 16bit buffer, + // so it can't handle bitmaps larger than 65535. + // + // We back off another bit to 32767 to make small amounts of + // intermediate math safe, e.g. in + // + // SkFixed fx = ...; + // fx = tile(fx + SK_Fixed1); + // + // we want to make sure (fx + SK_Fixed1) never overflows. + if (fImage-> width() > 32767 || + fImage->height() > 32767) { + return nullptr; + } + + SkMatrix inv; + if (!this->computeTotalInverse(*rec.fMatrix, rec.fLocalMatrix, &inv) || + !legacy_shader_can_handle(inv)) { + return nullptr; + } + + if (!rec.isLegacyCompatible(fImage->colorSpace())) { + return nullptr; + } + + return SkBitmapProcLegacyShader::MakeContext(*this, fTileModeX, fTileModeY, sampling, + as_IB(fImage.get()), rec, alloc); +} +#endif + +SkImage* SkImageShader::onIsAImage(SkMatrix* texM, SkTileMode xy[]) const { + if (texM) { + *texM = SkMatrix::I(); + } + if (xy) { + xy[0] = fTileModeX; + xy[1] = fTileModeY; + } + return const_cast(fImage.get()); +} + +sk_sp SkImageShader::Make(sk_sp image, + SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& options, + const SkMatrix* localMatrix, + bool clampAsIfUnpremul) { + SkRect subset = image ? SkRect::Make(image->dimensions()) : SkRect::MakeEmpty(); + return MakeSubset(std::move(image), subset, tmx, tmy, options, localMatrix, clampAsIfUnpremul); +} + +sk_sp SkImageShader::MakeRaw(sk_sp image, + SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& options, + const SkMatrix* localMatrix) { + if (options.useCubic) { + return nullptr; + } + if (!image) { + return SkShaders::Empty(); + } + auto subset = SkRect::Make(image->dimensions()); + return SkLocalMatrixShader::MakeWrapped(localMatrix, + image, + subset, + tmx, tmy, + options, + /*raw=*/true, + /*clampAsIfUnpremul=*/false); +} + +sk_sp SkImageShader::MakeSubset(sk_sp image, + const SkRect& subset, + SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& options, + const SkMatrix* localMatrix, + bool clampAsIfUnpremul) { + auto is_unit = [](float x) { + return x >= 0 && x <= 1; + }; + if (options.useCubic) { + if (!is_unit(options.cubic.B) || !is_unit(options.cubic.C)) { + return nullptr; + } + } + if (!image || subset.isEmpty()) { + return SkShaders::Empty(); + } + + // Validate subset and check if we can drop it + if (!SkRect::Make(image->bounds()).contains(subset)) { + return nullptr; + } + // TODO(skbug.com/12784): GPU-only for now since it's only supported in onAsFragmentProcessor() + SkASSERT(!needs_subset(image.get(), subset) || image->isTextureBacked()); + return SkLocalMatrixShader::MakeWrapped(localMatrix, + std::move(image), + subset, + tmx, tmy, + options, + /*raw=*/false, + clampAsIfUnpremul); +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/effects/GrBlendFragmentProcessor.h" + +std::unique_ptr +SkImageShader::asFragmentProcessor(const GrFPArgs& args, const MatrixRec& mRec) const { + SkTileMode tileModes[2] = {fTileModeX, fTileModeY}; + const SkRect* subset = needs_subset(fImage.get(), fSubset) ? &fSubset : nullptr; + auto fp = as_IB(fImage.get())->asFragmentProcessor(args.fContext, + fSampling, + tileModes, + SkMatrix::I(), + subset); + if (!fp) { + return nullptr; + } + + bool success; + std::tie(success, fp) = mRec.apply(std::move(fp)); + if (!success) { + return nullptr; + } + + if (!fRaw) { + fp = GrColorSpaceXformEffect::Make(std::move(fp), + fImage->colorSpace(), + fImage->alphaType(), + args.fDstColorInfo->colorSpace(), + kPremul_SkAlphaType); + + if (fImage->isAlphaOnly()) { + fp = GrBlendFragmentProcessor::Make(std::move(fp), nullptr); + } + } + + return fp; +} + +#endif + +#if defined(SK_GRAPHITE) +void SkImageShader::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + ImageShaderBlock::ImageData imgData(fSampling, fTileModeX, fTileModeY, fSubset, + ReadSwizzle::kRGBA); + + auto [ imageToDraw, newSampling ] = skgpu::graphite::GetGraphiteBacked(keyContext.recorder(), + fImage.get(), + fSampling); + + if (imageToDraw) { + imgData.fSampling = newSampling; + skgpu::Mipmapped mipmapped = (newSampling.mipmap != SkMipmapMode::kNone) + ? skgpu::Mipmapped::kYes : skgpu::Mipmapped::kNo; + + auto [view, _] = as_IB(imageToDraw)->asView(keyContext.recorder(), mipmapped); + imgData.fTextureProxy = view.refProxy(); + skgpu::Swizzle readSwizzle = view.swizzle(); + // If the color type is alpha-only, propagate the alpha value to the other channels. + if (imageToDraw->isAlphaOnly()) { + readSwizzle = skgpu::Swizzle::Concat(readSwizzle, skgpu::Swizzle("aaaa")); + } + imgData.fReadSwizzle = swizzle_class_to_read_enum(readSwizzle); + } + + if (!fRaw) { + imgData.fSteps = SkColorSpaceXformSteps(fImage->colorSpace(), + fImage->alphaType(), + keyContext.dstColorInfo().colorSpace(), + keyContext.dstColorInfo().alphaType()); + + if (fImage->isAlphaOnly()) { + SkSpan constants = skgpu::GetPorterDuffBlendConstants(SkBlendMode::kDstIn); + // expects dst, src + PorterDuffBlendShaderBlock::BeginBlock(keyContext, builder, gatherer, + {constants}); + + // dst + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, + keyContext.paintColor()); + builder->endBlock(); + + // src + ImageShaderBlock::BeginBlock(keyContext, builder, gatherer, &imgData); + builder->endBlock(); + + builder->endBlock(); + return; + } + } + + ImageShaderBlock::BeginBlock(keyContext, builder, gatherer, &imgData); + builder->endBlock(); +} +#endif + +/////////////////////////////////////////////////////////////////////////////////////////////////// +#include "src/core/SkImagePriv.h" + +sk_sp SkMakeBitmapShaderForPaint(const SkPaint& paint, const SkBitmap& src, + SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions& sampling, + const SkMatrix* localMatrix, SkCopyPixelsMode mode) { + auto s = SkImageShader::Make(SkMakeImageFromRasterBitmap(src, mode), + tmx, tmy, sampling, localMatrix); + if (!s) { + return nullptr; + } + if (SkColorTypeIsAlphaOnly(src.colorType()) && paint.getShader()) { + // Compose the image shader with the paint's shader. Alpha images+shaders should output the + // texture's alpha multiplied by the shader's color. DstIn (d*sa) will achieve this with + // the source image and dst shader (MakeBlend takes dst first, src second). + s = SkShaders::Blend(SkBlendMode::kDstIn, paint.refShader(), std::move(s)); + } + return s; +} + +void SkShaderBase::RegisterFlattenables() { SK_REGISTER_FLATTENABLE(SkImageShader); } + +namespace { + +struct MipLevelHelper { + SkPixmap pm; + SkMatrix inv; + SkRasterPipeline_GatherCtx* gather; + SkRasterPipeline_TileCtx* limitX; + SkRasterPipeline_TileCtx* limitY; + SkRasterPipeline_DecalTileCtx* decalCtx = nullptr; + + void allocAndInit(SkArenaAlloc* alloc, + const SkSamplingOptions& sampling, + SkTileMode tileModeX, + SkTileMode tileModeY) { + gather = alloc->make(); + gather->pixels = pm.addr(); + gather->stride = pm.rowBytesAsPixels(); + gather->width = pm.width(); + gather->height = pm.height(); + + if (sampling.useCubic) { + SkImageShader::CubicResamplerMatrix(sampling.cubic.B, sampling.cubic.C) + .getColMajor(gather->weights); + } + + limitX = alloc->make(); + limitY = alloc->make(); + limitX->scale = pm.width(); + limitX->invScale = 1.0f / pm.width(); + limitY->scale = pm.height(); + limitY->invScale = 1.0f / pm.height(); + + // We would like an image that is mapped 1:1 with device pixels but at a half pixel offset + // to select every pixel from the src image once. Our rasterizer biases upward. That is a + // rect from 0.5...1.5 fills pixel 1 and not pixel 0. So we make exact integer pixel sample + // values select the pixel to the left/above the integer value. + // + // Note that a mirror mapping between canvas and image space will not have this property - + // on one side of the image a row/column will be skipped and one repeated on the other side. + // + // The GM nearest_half_pixel_image tests both of the above scenarios. + // + // The implementation of SkTileMode::kMirror also modifies integer pixel snapping to create + // consistency when the sample coords are running backwards and must account for gather + // modification we perform here. The GM mirror_tile tests this. + if (!sampling.useCubic && sampling.filter == SkFilterMode::kNearest) { + gather->roundDownAtInteger = true; + limitX->mirrorBiasDir = limitY->mirrorBiasDir = 1; + } + + if (tileModeX == SkTileMode::kDecal || tileModeY == SkTileMode::kDecal) { + decalCtx = alloc->make(); + decalCtx->limit_x = limitX->scale; + decalCtx->limit_y = limitY->scale; + + // When integer sample coords snap left/up then we want the right/bottom edge of the + // image bounds to be inside the image rather than the left/top edge, that is (0, w] + // rather than [0, w). + if (gather->roundDownAtInteger) { + decalCtx->inclusiveEdge_x = decalCtx->limit_x; + decalCtx->inclusiveEdge_y = decalCtx->limit_y; + } + } + } +}; + +} // namespace + +static SkSamplingOptions tweak_sampling(SkSamplingOptions sampling, const SkMatrix& matrix) { + SkFilterMode filter = sampling.filter; + + // When the matrix is just an integer translate, bilerp == nearest neighbor. + if (filter == SkFilterMode::kLinear && + matrix.getType() <= SkMatrix::kTranslate_Mask && + matrix.getTranslateX() == (int)matrix.getTranslateX() && + matrix.getTranslateY() == (int)matrix.getTranslateY()) { + filter = SkFilterMode::kNearest; + } + + return SkSamplingOptions(filter, sampling.mipmap); +} + +bool SkImageShader::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + SkASSERT(!needs_subset(fImage.get(), fSubset)); // TODO(skbug.com/12784) + + // We only support certain sampling options in stages so far + auto sampling = fSampling; + if (sampling.isAniso()) { + sampling = SkSamplingPriv::AnisoFallback(fImage->hasMipmaps()); + } + + SkRasterPipeline* p = rec.fPipeline; + SkArenaAlloc* alloc = rec.fAlloc; + + SkMatrix baseInv; + // If the total matrix isn't valid then we will always access the base MIP level. + if (mRec.totalMatrixIsValid()) { + if (!mRec.totalInverse(&baseInv)) { + return false; + } + baseInv.normalizePerspective(); + } + + SkASSERT(!sampling.useCubic || sampling.mipmap == SkMipmapMode::kNone); + auto* access = SkMipmapAccessor::Make(alloc, fImage.get(), baseInv, sampling.mipmap); + if (!access) { + return false; + } + + MipLevelHelper upper; + std::tie(upper.pm, upper.inv) = access->level(); + + if (!sampling.useCubic) { + // TODO: can tweak_sampling sometimes for cubic too when B=0 + if (mRec.totalMatrixIsValid()) { + sampling = tweak_sampling(sampling, SkMatrix::Concat(upper.inv, baseInv)); + } + } + + if (!mRec.apply(rec, upper.inv)) { + return false; + } + + upper.allocAndInit(alloc, sampling, fTileModeX, fTileModeY); + + MipLevelHelper lower; + SkRasterPipeline_MipmapCtx* mipmapCtx = nullptr; + float lowerWeight = access->lowerWeight(); + if (lowerWeight > 0) { + std::tie(lower.pm, lower.inv) = access->lowerLevel(); + mipmapCtx = alloc->make(); + mipmapCtx->lowerWeight = lowerWeight; + mipmapCtx->scaleX = static_cast(lower.pm.width()) / upper.pm.width(); + mipmapCtx->scaleY = static_cast(lower.pm.height()) / upper.pm.height(); + + lower.allocAndInit(alloc, sampling, fTileModeX, fTileModeY); + + p->append(SkRasterPipelineOp::mipmap_linear_init, mipmapCtx); + } + + const bool decalBothAxes = fTileModeX == SkTileMode::kDecal && fTileModeY == SkTileMode::kDecal; + + auto append_tiling_and_gather = [&](const MipLevelHelper* level) { + if (decalBothAxes) { + p->append(SkRasterPipelineOp::decal_x_and_y, level->decalCtx); + } else { + switch (fTileModeX) { + case SkTileMode::kClamp: /* The gather_xxx stage will clamp for us. */ + break; + case SkTileMode::kMirror: + p->append(SkRasterPipelineOp::mirror_x, level->limitX); + break; + case SkTileMode::kRepeat: + p->append(SkRasterPipelineOp::repeat_x, level->limitX); + break; + case SkTileMode::kDecal: + p->append(SkRasterPipelineOp::decal_x, level->decalCtx); + break; + } + switch (fTileModeY) { + case SkTileMode::kClamp: /* The gather_xxx stage will clamp for us. */ + break; + case SkTileMode::kMirror: + p->append(SkRasterPipelineOp::mirror_y, level->limitY); + break; + case SkTileMode::kRepeat: + p->append(SkRasterPipelineOp::repeat_y, level->limitY); + break; + case SkTileMode::kDecal: + p->append(SkRasterPipelineOp::decal_y, level->decalCtx); + break; + } + } + + void* ctx = level->gather; + switch (level->pm.colorType()) { + case kAlpha_8_SkColorType: p->append(SkRasterPipelineOp::gather_a8, ctx); break; + case kA16_unorm_SkColorType: p->append(SkRasterPipelineOp::gather_a16, ctx); break; + case kA16_float_SkColorType: p->append(SkRasterPipelineOp::gather_af16, ctx); break; + case kRGB_565_SkColorType: p->append(SkRasterPipelineOp::gather_565, ctx); break; + case kARGB_4444_SkColorType: p->append(SkRasterPipelineOp::gather_4444, ctx); break; + case kR8G8_unorm_SkColorType: p->append(SkRasterPipelineOp::gather_rg88, ctx); break; + case kR16G16_unorm_SkColorType: p->append(SkRasterPipelineOp::gather_rg1616,ctx); break; + case kR16G16_float_SkColorType: p->append(SkRasterPipelineOp::gather_rgf16, ctx); break; + case kRGBA_8888_SkColorType: p->append(SkRasterPipelineOp::gather_8888, ctx); break; + + case kRGBA_1010102_SkColorType: + p->append(SkRasterPipelineOp::gather_1010102, ctx); + break; + + case kR16G16B16A16_unorm_SkColorType: + p->append(SkRasterPipelineOp::gather_16161616, ctx); + break; + + case kRGBA_F16Norm_SkColorType: + case kRGBA_F16_SkColorType: p->append(SkRasterPipelineOp::gather_f16, ctx); break; + case kRGBA_F32_SkColorType: p->append(SkRasterPipelineOp::gather_f32, ctx); break; + + case kGray_8_SkColorType: p->append(SkRasterPipelineOp::gather_a8, ctx); + p->append(SkRasterPipelineOp::alpha_to_gray ); break; + + case kR8_unorm_SkColorType: p->append(SkRasterPipelineOp::gather_a8, ctx); + p->append(SkRasterPipelineOp::alpha_to_red ); break; + + case kRGB_888x_SkColorType: p->append(SkRasterPipelineOp::gather_8888, ctx); + p->append(SkRasterPipelineOp::force_opaque ); break; + + case kBGRA_1010102_SkColorType: + p->append(SkRasterPipelineOp::gather_1010102, ctx); + p->append(SkRasterPipelineOp::swap_rb); + break; + + case kRGB_101010x_SkColorType: + p->append(SkRasterPipelineOp::gather_1010102, ctx); + p->append(SkRasterPipelineOp::force_opaque); + break; + + case kBGR_101010x_XR_SkColorType: + SkASSERT(false); + break; + + case kBGR_101010x_SkColorType: + p->append(SkRasterPipelineOp::gather_1010102, ctx); + p->append(SkRasterPipelineOp::force_opaque); + p->append(SkRasterPipelineOp::swap_rb); + break; + + case kBGRA_8888_SkColorType: + p->append(SkRasterPipelineOp::gather_8888, ctx); + p->append(SkRasterPipelineOp::swap_rb); + break; + + case kSRGBA_8888_SkColorType: + p->append(SkRasterPipelineOp::gather_8888, ctx); + p->append_transfer_function(*skcms_sRGB_TransferFunction()); + break; + + case kUnknown_SkColorType: SkASSERT(false); + } + if (level->decalCtx) { + p->append(SkRasterPipelineOp::check_decal_mask, level->decalCtx); + } + }; + + auto append_misc = [&] { + SkColorSpace* cs = upper.pm.colorSpace(); + SkAlphaType at = upper.pm.alphaType(); + + // Color for alpha-only images comes from the paint (already converted to dst color space). + if (SkColorTypeIsAlphaOnly(upper.pm.colorType()) && !fRaw) { + p->append_set_rgb(alloc, rec.fPaintColor); + + cs = rec.fDstCS; + at = kUnpremul_SkAlphaType; + } + + // Bicubic filtering naturally produces out of range values on both sides of [0,1]. + if (sampling.useCubic) { + p->append(at == kUnpremul_SkAlphaType || fClampAsIfUnpremul + ? SkRasterPipelineOp::clamp_01 + : SkRasterPipelineOp::clamp_gamut); + } + + // Transform color space and alpha type to match shader convention (dst CS, premul alpha). + if (!fRaw) { + alloc->make(cs, at, rec.fDstCS, kPremul_SkAlphaType)->apply(p); + } + + return true; + }; + + // Check for fast-path stages. + // TODO: Could we use the fast-path stages for each level when doing linear mipmap filtering? + SkColorType ct = upper.pm.colorType(); + if (true + && (ct == kRGBA_8888_SkColorType || ct == kBGRA_8888_SkColorType) + && !sampling.useCubic && sampling.filter == SkFilterMode::kLinear + && sampling.mipmap != SkMipmapMode::kLinear + && fTileModeX == SkTileMode::kClamp && fTileModeY == SkTileMode::kClamp) { + + p->append(SkRasterPipelineOp::bilerp_clamp_8888, upper.gather); + if (ct == kBGRA_8888_SkColorType) { + p->append(SkRasterPipelineOp::swap_rb); + } + return append_misc(); + } + if (true + && (ct == kRGBA_8888_SkColorType || ct == kBGRA_8888_SkColorType) + && sampling.useCubic + && fTileModeX == SkTileMode::kClamp && fTileModeY == SkTileMode::kClamp) { + + p->append(SkRasterPipelineOp::bicubic_clamp_8888, upper.gather); + if (ct == kBGRA_8888_SkColorType) { + p->append(SkRasterPipelineOp::swap_rb); + } + return append_misc(); + } + + // This context can be shared by both levels when doing linear mipmap filtering + SkRasterPipeline_SamplerCtx* sampler = alloc->make(); + + auto sample = [&](SkRasterPipelineOp setup_x, + SkRasterPipelineOp setup_y, + const MipLevelHelper* level) { + p->append(setup_x, sampler); + p->append(setup_y, sampler); + append_tiling_and_gather(level); + p->append(SkRasterPipelineOp::accumulate, sampler); + }; + + auto sample_level = [&](const MipLevelHelper* level) { + if (sampling.useCubic) { + CubicResamplerMatrix(sampling.cubic.B, sampling.cubic.C).getColMajor(sampler->weights); + + p->append(SkRasterPipelineOp::bicubic_setup, sampler); + + sample(SkRasterPipelineOp::bicubic_n3x, SkRasterPipelineOp::bicubic_n3y, level); + sample(SkRasterPipelineOp::bicubic_n1x, SkRasterPipelineOp::bicubic_n3y, level); + sample(SkRasterPipelineOp::bicubic_p1x, SkRasterPipelineOp::bicubic_n3y, level); + sample(SkRasterPipelineOp::bicubic_p3x, SkRasterPipelineOp::bicubic_n3y, level); + + sample(SkRasterPipelineOp::bicubic_n3x, SkRasterPipelineOp::bicubic_n1y, level); + sample(SkRasterPipelineOp::bicubic_n1x, SkRasterPipelineOp::bicubic_n1y, level); + sample(SkRasterPipelineOp::bicubic_p1x, SkRasterPipelineOp::bicubic_n1y, level); + sample(SkRasterPipelineOp::bicubic_p3x, SkRasterPipelineOp::bicubic_n1y, level); + + sample(SkRasterPipelineOp::bicubic_n3x, SkRasterPipelineOp::bicubic_p1y, level); + sample(SkRasterPipelineOp::bicubic_n1x, SkRasterPipelineOp::bicubic_p1y, level); + sample(SkRasterPipelineOp::bicubic_p1x, SkRasterPipelineOp::bicubic_p1y, level); + sample(SkRasterPipelineOp::bicubic_p3x, SkRasterPipelineOp::bicubic_p1y, level); + + sample(SkRasterPipelineOp::bicubic_n3x, SkRasterPipelineOp::bicubic_p3y, level); + sample(SkRasterPipelineOp::bicubic_n1x, SkRasterPipelineOp::bicubic_p3y, level); + sample(SkRasterPipelineOp::bicubic_p1x, SkRasterPipelineOp::bicubic_p3y, level); + sample(SkRasterPipelineOp::bicubic_p3x, SkRasterPipelineOp::bicubic_p3y, level); + + p->append(SkRasterPipelineOp::move_dst_src); + } else if (sampling.filter == SkFilterMode::kLinear) { + p->append(SkRasterPipelineOp::bilinear_setup, sampler); + + sample(SkRasterPipelineOp::bilinear_nx, SkRasterPipelineOp::bilinear_ny, level); + sample(SkRasterPipelineOp::bilinear_px, SkRasterPipelineOp::bilinear_ny, level); + sample(SkRasterPipelineOp::bilinear_nx, SkRasterPipelineOp::bilinear_py, level); + sample(SkRasterPipelineOp::bilinear_px, SkRasterPipelineOp::bilinear_py, level); + + p->append(SkRasterPipelineOp::move_dst_src); + } else { + append_tiling_and_gather(level); + } + }; + + sample_level(&upper); + + if (mipmapCtx) { + p->append(SkRasterPipelineOp::mipmap_linear_update, mipmapCtx); + sample_level(&lower); + p->append(SkRasterPipelineOp::mipmap_linear_finish, mipmapCtx); + } + + return append_misc(); +} + +skvm::Color SkImageShader::program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord origLocal, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + SkASSERT(!needs_subset(fImage.get(), fSubset)); // TODO(skbug.com/12784) + + auto sampling = fSampling; + if (sampling.isAniso()) { + sampling = SkSamplingPriv::AnisoFallback(fImage->hasMipmaps()); + } + + SkMatrix baseInv; + // If the total matrix isn't valid then we will always access the base MIP level. + if (mRec.totalMatrixIsValid()) { + if (!mRec.totalInverse(&baseInv)) { + return {}; + } + baseInv.normalizePerspective(); + } + + SkASSERT(!sampling.useCubic || sampling.mipmap == SkMipmapMode::kNone); + auto* access = SkMipmapAccessor::Make(alloc, fImage.get(), baseInv, sampling.mipmap); + if (!access) { + return {}; + } + + SkPixmap upper; + SkMatrix upperInv; + std::tie(upper, upperInv) = access->level(); + + if (!sampling.useCubic) { + // TODO: can tweak_sampling sometimes for cubic too when B=0 + if (mRec.totalMatrixIsValid()) { + sampling = tweak_sampling(sampling, SkMatrix::Concat(upperInv, baseInv)); + } + } + + SkPixmap lowerPixmap; + SkMatrix lowerInv; + SkPixmap* lower = nullptr; + float lowerWeight = access->lowerWeight(); + if (lowerWeight > 0) { + std::tie(lowerPixmap, lowerInv) = access->lowerLevel(); + lower = &lowerPixmap; + } + + skvm::Coord upperLocal = origLocal; + if (!mRec.apply(p, &upperLocal, uniforms, upperInv).has_value()) { + return {}; + } + + // We can exploit image opacity to skip work unpacking alpha channels. + const bool input_is_opaque = SkAlphaTypeIsOpaque(upper.alphaType()) + || SkColorTypeIsAlwaysOpaque(upper.colorType()); + + // Each call to sample() will try to rewrite the same uniforms over and over, + // so remember where we start and reset back there each time. That way each + // sample() call uses the same uniform offsets. + + auto compute_clamp_limit = [&](float limit) { + // Subtract an ulp so the upper clamp limit excludes limit itself. + int bits; + memcpy(&bits, &limit, 4); + return p->uniformF(uniforms->push(bits-1)); + }; + + // Except in the simplest case (no mips, no filtering), we reference uniforms + // more than once. To avoid adding/registering them multiple times, we pre-load them + // into a struct (just to logically group them together), based on the "current" + // pixmap (level of a mipmap). + // + struct Uniforms { + skvm::F32 w, iw, i2w, + h, ih, i2h; + + skvm::F32 clamp_w, + clamp_h; + + skvm::Uniform addr; + skvm::I32 rowBytesAsPixels; + + skvm::PixelFormat pixelFormat; // not a uniform, but needed for each texel sample, + // so we store it here, since it is also dependent on + // the current pixmap (level). + }; + + auto setup_uniforms = [&](const SkPixmap& pm) -> Uniforms { + skvm::PixelFormat pixelFormat = skvm::SkColorType_to_PixelFormat(pm.colorType()); + return { + p->uniformF(uniforms->pushF( pm.width())), + p->uniformF(uniforms->pushF(1.0f/pm.width())), // iff tileX == kRepeat + p->uniformF(uniforms->pushF(0.5f/pm.width())), // iff tileX == kMirror + + p->uniformF(uniforms->pushF( pm.height())), + p->uniformF(uniforms->pushF(1.0f/pm.height())), // iff tileY == kRepeat + p->uniformF(uniforms->pushF(0.5f/pm.height())), // iff tileY == kMirror + + compute_clamp_limit(pm. width()), + compute_clamp_limit(pm.height()), + + uniforms->pushPtr(pm.addr()), + p->uniform32(uniforms->push(pm.rowBytesAsPixels())), + + pixelFormat, + }; + }; + + auto sample_texel = [&](const Uniforms& u, skvm::F32 sx, skvm::F32 sy) -> skvm::Color { + // repeat() and mirror() are written assuming they'll be followed by a [0,scale) clamp. + auto repeat = [&](skvm::F32 v, skvm::F32 S, skvm::F32 I) { + return v - floor(v * I) * S; + }; + auto mirror = [&](skvm::F32 v, skvm::F32 S, skvm::F32 I2) { + // abs( (v-scale) - (2*scale)*floor((v-scale)*(0.5f/scale)) - scale ) + // {---A---} {------------------B------------------} + skvm::F32 A = v - S, + B = (S + S) * floor(A * I2); + return abs(A - B - S); + }; + switch (fTileModeX) { + case SkTileMode::kDecal: /* handled after gather */ break; + case SkTileMode::kClamp: /* we always clamp */ break; + case SkTileMode::kRepeat: sx = repeat(sx, u.w, u.iw); break; + case SkTileMode::kMirror: sx = mirror(sx, u.w, u.i2w); break; + } + switch (fTileModeY) { + case SkTileMode::kDecal: /* handled after gather */ break; + case SkTileMode::kClamp: /* we always clamp */ break; + case SkTileMode::kRepeat: sy = repeat(sy, u.h, u.ih); break; + case SkTileMode::kMirror: sy = mirror(sy, u.h, u.i2h); break; + } + + // Always clamp sample coordinates to [0,width), [0,height), both for memory + // safety and to handle the clamps still needed by kClamp, kRepeat, and kMirror. + skvm::F32 clamped_x = clamp(sx, 0, u.clamp_w), + clamped_y = clamp(sy, 0, u.clamp_h); + + // Load pixels from pm.addr()[(int)sx + (int)sy*stride]. + skvm::I32 index = trunc(clamped_x) + + trunc(clamped_y) * u.rowBytesAsPixels; + skvm::Color c = gather(u.pixelFormat, u.addr, index); + + // If we know the image is opaque, jump right to alpha = 1.0f, skipping work to unpack it. + if (input_is_opaque) { + c.a = p->splat(1.0f); + } + + // Mask away any pixels that we tried to sample outside the bounds in kDecal. + if (fTileModeX == SkTileMode::kDecal || fTileModeY == SkTileMode::kDecal) { + skvm::I32 mask = p->splat(~0); + if (fTileModeX == SkTileMode::kDecal) { mask &= (sx == clamped_x); } + if (fTileModeY == SkTileMode::kDecal) { mask &= (sy == clamped_y); } + c.r = pun_to_F32(p->bit_and(mask, pun_to_I32(c.r))); + c.g = pun_to_F32(p->bit_and(mask, pun_to_I32(c.g))); + c.b = pun_to_F32(p->bit_and(mask, pun_to_I32(c.b))); + c.a = pun_to_F32(p->bit_and(mask, pun_to_I32(c.a))); + // Notice that even if input_is_opaque, c.a might now be 0. + } + + return c; + }; + + auto sample_level = [&](const SkPixmap& pm, skvm::Coord local) { + const Uniforms u = setup_uniforms(pm); + + if (sampling.useCubic) { + // All bicubic samples have the same fractional offset (fx,fy) from the center. + // They're either the 16 corners of a 3x3 grid/ surrounding (x,y) at (0.5,0.5) off-center. + skvm::F32 fx = fract(local.x + 0.5f), + fy = fract(local.y + 0.5f); + skvm::F32 wx[4], + wy[4]; + + SkM44 weights = CubicResamplerMatrix(sampling.cubic.B, sampling.cubic.C); + + auto dot = [](const skvm::F32 a[], const skvm::F32 b[]) { + return a[0]*b[0] + a[1]*b[1] + a[2]*b[2] + a[3]*b[3]; + }; + const skvm::F32 tmpx[] = { p->splat(1.0f), fx, fx*fx, fx*fx*fx }; + const skvm::F32 tmpy[] = { p->splat(1.0f), fy, fy*fy, fy*fy*fy }; + + for (int row = 0; row < 4; ++row) { + SkV4 r = weights.row(row); + skvm::F32 ru[] = { + p->uniformF(uniforms->pushF(r[0])), + p->uniformF(uniforms->pushF(r[1])), + p->uniformF(uniforms->pushF(r[2])), + p->uniformF(uniforms->pushF(r[3])), + }; + wx[row] = dot(ru, tmpx); + wy[row] = dot(ru, tmpy); + } + + skvm::Color c; + c.r = c.g = c.b = c.a = p->splat(0.0f); + + skvm::F32 sy = local.y - 1.5f; + for (int j = 0; j < 4; j++, sy += 1.0f) { + skvm::F32 sx = local.x - 1.5f; + for (int i = 0; i < 4; i++, sx += 1.0f) { + skvm::Color s = sample_texel(u, sx,sy); + skvm::F32 w = wx[i] * wy[j]; + + c.r += s.r * w; + c.g += s.g * w; + c.b += s.b * w; + c.a += s.a * w; + } + } + return c; + } else if (sampling.filter == SkFilterMode::kLinear) { + // Our four sample points are the corners of a logical 1x1 pixel + // box surrounding (x,y) at (0.5,0.5) off-center. + skvm::F32 left = local.x - 0.5f, + top = local.y - 0.5f, + right = local.x + 0.5f, + bottom = local.y + 0.5f; + + // The fractional parts of right and bottom are our lerp factors in x and y respectively. + skvm::F32 fx = fract(right ), + fy = fract(bottom); + + return lerp(lerp(sample_texel(u, left,top ), sample_texel(u, right,top ), fx), + lerp(sample_texel(u, left,bottom), sample_texel(u, right,bottom), fx), fy); + } else { + SkASSERT(sampling.filter == SkFilterMode::kNearest); + // Our rasterizer biases upward. That is a rect from 0.5...1.5 fills pixel 1 and not + // pixel 0. To make an image that is mapped 1:1 with device pixels but at a half pixel + // offset select every pixel from the src image once we make exact integer pixel sample + // values round down not up. Note that a mirror mapping will not have this property. + local.x = skvm::pun_to_F32(skvm::pun_to_I32(local.x) - 1); + local.y = skvm::pun_to_F32(skvm::pun_to_I32(local.y) - 1); + return sample_texel(u, local.x,local.y); + } + }; + + skvm::Color c = sample_level(upper, upperLocal); + if (lower) { + skvm::Coord lowerLocal = origLocal; + if (!mRec.apply(p, &lowerLocal, uniforms, lowerInv)) { + return {}; + } + // lower * weight + upper * (1 - weight) + c = lerp(c, + sample_level(*lower, lowerLocal), + p->uniformF(uniforms->pushF(lowerWeight))); + } + + // If the input is opaque and we're not in decal mode, that means the output is too. + // Forcing *a to 1.0 here will retroactively skip any work we did to interpolate sample alphas. + if (input_is_opaque + && fTileModeX != SkTileMode::kDecal + && fTileModeY != SkTileMode::kDecal) { + c.a = p->splat(1.0f); + } + + // Alpha-only images get their color from the paint (already converted to dst color space). + SkColorSpace* cs = upper.colorSpace(); + SkAlphaType at = upper.alphaType(); + if (SkColorTypeIsAlphaOnly(upper.colorType()) && !fRaw) { + c.r = paint.r; + c.g = paint.g; + c.b = paint.b; + + cs = dst.colorSpace(); + at = kUnpremul_SkAlphaType; + } + + if (sampling.useCubic) { + // Bicubic filtering naturally produces out of range values on both sides of [0,1]. + c.a = clamp01(c.a); + + skvm::F32 limit = (at == kUnpremul_SkAlphaType || fClampAsIfUnpremul) + ? p->splat(1.0f) + : c.a; + c.r = clamp(c.r, 0.0f, limit); + c.g = clamp(c.g, 0.0f, limit); + c.b = clamp(c.b, 0.0f, limit); + } + + return fRaw ? c + : SkColorSpaceXformSteps{cs, at, dst.colorSpace(), dst.alphaType()}.program( + p, uniforms, c); +} diff --git a/gfx/skia/skia/src/shaders/SkImageShader.h b/gfx/skia/skia/src/shaders/SkImageShader.h new file mode 100644 index 0000000000..3740aec1f8 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkImageShader.h @@ -0,0 +1,106 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkImageShader_DEFINED +#define SkImageShader_DEFINED + +#include "include/core/SkImage.h" +#include "include/core/SkM44.h" +#include "src/shaders/SkBitmapProcShader.h" +#include "src/shaders/SkShaderBase.h" + +namespace skgpu { +class Swizzle; +} + +namespace skgpu::graphite { +class KeyContext; +enum class ReadSwizzle; +} + +class SkImageShader : public SkShaderBase { +public: + static sk_sp Make(sk_sp, + SkTileMode tmx, + SkTileMode tmy, + const SkSamplingOptions&, + const SkMatrix* localMatrix, + bool clampAsIfUnpremul = false); + + static sk_sp MakeRaw(sk_sp, + SkTileMode tmx, + SkTileMode tmy, + const SkSamplingOptions&, + const SkMatrix* localMatrix); + + // TODO(skbug.com/12784): Requires SkImage to be texture backed, and created SkShader can only + // be used on GPU-backed surfaces. + static sk_sp MakeSubset(sk_sp, + const SkRect& subset, + SkTileMode tmx, + SkTileMode tmy, + const SkSamplingOptions&, + const SkMatrix* localMatrix, + bool clampAsIfUnpremul = false); + + SkImageShader(sk_sp, + const SkRect& subset, + SkTileMode tmx, SkTileMode tmy, + const SkSamplingOptions&, + bool raw, + bool clampAsIfUnpremul); + + bool isOpaque() const override; + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + static SkM44 CubicResamplerMatrix(float B, float C); + +private: + SK_FLATTENABLE_HOOKS(SkImageShader) + + void flatten(SkWriteBuffer&) const override; +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT + Context* onMakeContext(const ContextRec&, SkArenaAlloc* storage) const override; +#endif + SkImage* onIsAImage(SkMatrix*, SkTileMode*) const override; + + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const override; + + sk_sp fImage; + const SkSamplingOptions fSampling; + const SkTileMode fTileModeX; + const SkTileMode fTileModeY; + + // TODO(skbug.com/12784): This is only supported for GPU images currently. + // If subset == (0,0,w,h) of the image, then no subset is applied. Subset will not be empty. + const SkRect fSubset; + + const bool fRaw; + const bool fClampAsIfUnpremul; + + friend class SkShaderBase; + using INHERITED = SkShaderBase; +}; + +#endif diff --git a/gfx/skia/skia/src/shaders/SkLocalMatrixShader.cpp b/gfx/skia/skia/src/shaders/SkLocalMatrixShader.cpp new file mode 100644 index 0000000000..ceddf24c53 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkLocalMatrixShader.cpp @@ -0,0 +1,221 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkTLazy.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkVM.h" +#include "src/shaders/SkLocalMatrixShader.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrMatrixEffect.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +SkShaderBase::GradientType SkLocalMatrixShader::asGradient(GradientInfo* info, + SkMatrix* localMatrix) const { + GradientType type = as_SB(fWrappedShader)->asGradient(info, localMatrix); + if (type != SkShaderBase::GradientType::kNone && localMatrix) { + *localMatrix = ConcatLocalMatrices(fLocalMatrix, *localMatrix); + } + return type; +} + +#if defined(SK_GANESH) +std::unique_ptr SkLocalMatrixShader::asFragmentProcessor( + const GrFPArgs& args, const MatrixRec& mRec) const { + return as_SB(fWrappedShader)->asFragmentProcessor(args, mRec.concat(fLocalMatrix)); +} +#endif + +#if defined(SK_GRAPHITE) +void SkLocalMatrixShader::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + LocalMatrixShaderBlock::LMShaderData lmShaderData(fLocalMatrix); + + KeyContextWithLocalMatrix newContext(keyContext, fLocalMatrix); + + LocalMatrixShaderBlock::BeginBlock(newContext, builder, gatherer, &lmShaderData); + + as_SB(fWrappedShader)->addToKey(newContext, builder, gatherer); + + builder->endBlock(); +} +#endif + +sk_sp SkLocalMatrixShader::CreateProc(SkReadBuffer& buffer) { + SkMatrix lm; + buffer.readMatrix(&lm); + auto baseShader(buffer.readShader()); + if (!baseShader) { + return nullptr; + } + return baseShader->makeWithLocalMatrix(lm); +} + +void SkLocalMatrixShader::flatten(SkWriteBuffer& buffer) const { + buffer.writeMatrix(fLocalMatrix); + buffer.writeFlattenable(fWrappedShader.get()); +} + +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT +SkShaderBase::Context* SkLocalMatrixShader::onMakeContext( + const ContextRec& rec, SkArenaAlloc* alloc) const +{ + SkTCopyOnFirstWrite lm(fLocalMatrix); + if (rec.fLocalMatrix) { + *lm.writable() = ConcatLocalMatrices(*rec.fLocalMatrix, *lm); + } + + ContextRec newRec(rec); + newRec.fLocalMatrix = lm; + + return as_SB(fWrappedShader)->makeContext(newRec, alloc); +} +#endif + +SkImage* SkLocalMatrixShader::onIsAImage(SkMatrix* outMatrix, SkTileMode* mode) const { + SkMatrix imageMatrix; + SkImage* image = fWrappedShader->isAImage(&imageMatrix, mode); + if (image && outMatrix) { + *outMatrix = ConcatLocalMatrices(fLocalMatrix, imageMatrix); + } + + return image; +} + +bool SkLocalMatrixShader::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + return as_SB(fWrappedShader)->appendStages(rec, mRec.concat(fLocalMatrix)); +} + +skvm::Color SkLocalMatrixShader::program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + return as_SB(fWrappedShader)->program(p, + device, + local, + paint, + mRec.concat(fLocalMatrix), + dst, + uniforms, + alloc); +} + +sk_sp SkShader::makeWithLocalMatrix(const SkMatrix& localMatrix) const { + if (localMatrix.isIdentity()) { + return sk_ref_sp(const_cast(this)); + } + + const SkMatrix* lm = &localMatrix; + + sk_sp baseShader; + SkMatrix otherLocalMatrix; + sk_sp proxy = as_SB(this)->makeAsALocalMatrixShader(&otherLocalMatrix); + if (proxy) { + otherLocalMatrix = SkShaderBase::ConcatLocalMatrices(localMatrix, otherLocalMatrix); + lm = &otherLocalMatrix; + baseShader = proxy; + } else { + baseShader = sk_ref_sp(const_cast(this)); + } + + return sk_make_sp(std::move(baseShader), *lm); +} + +//////////////////////////////////////////////////////////////////// + +/** + * Replaces the CTM when used. Created to support clipShaders, which have to be evaluated + * using the CTM that was present at the time they were specified (which may be different + * from the CTM at the time something is drawn through the clip. + */ +class SkCTMShader final : public SkShaderBase { +public: + SkCTMShader(sk_sp proxy, const SkMatrix& ctm) + : fProxyShader(std::move(proxy)) + , fCTM(ctm) + {} + + GradientType asGradient(GradientInfo* info, SkMatrix* localMatrix) const override { + return as_SB(fProxyShader)->asGradient(info, localMatrix); + } + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif + +protected: + void flatten(SkWriteBuffer&) const override { SkASSERT(false); } + + bool appendStages(const SkStageRec& rec, const MatrixRec&) const override { + return as_SB(fProxyShader)->appendRootStages(rec, fCTM); + } + + skvm::Color program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override { + return as_SB(fProxyShader)->rootProgram(p, device, paint, fCTM, dst, uniforms, alloc); + } + +private: + SK_FLATTENABLE_HOOKS(SkCTMShader) + + sk_sp fProxyShader; + SkMatrix fCTM; + + using INHERITED = SkShaderBase; +}; + + +#if defined(SK_GANESH) +std::unique_ptr SkCTMShader::asFragmentProcessor(const GrFPArgs& args, + const MatrixRec& mRec) const { + SkMatrix ctmInv; + if (!fCTM.invert(&ctmInv)) { + return nullptr; + } + + auto base = as_SB(fProxyShader)->asRootFragmentProcessor(args, fCTM); + if (!base) { + return nullptr; + } + + // In order for the shader to be evaluated with the original CTM, we explicitly evaluate it + // at sk_FragCoord, and pass that through the inverse of the original CTM. This avoids requiring + // local coords for the shader and mapping from the draw's local to device and then back. + return GrFragmentProcessor::DeviceSpace(GrMatrixEffect::Make(ctmInv, std::move(base))); +} +#endif + +sk_sp SkCTMShader::CreateProc(SkReadBuffer& buffer) { + SkASSERT(false); + return nullptr; +} + +sk_sp SkShaderBase::makeWithCTM(const SkMatrix& postM) const { + return sk_sp(new SkCTMShader(sk_ref_sp(this), postM)); +} diff --git a/gfx/skia/skia/src/shaders/SkLocalMatrixShader.h b/gfx/skia/skia/src/shaders/SkLocalMatrixShader.h new file mode 100644 index 0000000000..e4b186621e --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkLocalMatrixShader.h @@ -0,0 +1,81 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLocalMatrixShader_DEFINED +#define SkLocalMatrixShader_DEFINED + +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkShaderBase.h" + +class GrFragmentProcessor; +class SkArenaAlloc; + +class SkLocalMatrixShader final : public SkShaderBase { +public: + template + static std::enable_if_t, sk_sp> + MakeWrapped(const SkMatrix* localMatrix, Args&&... args) { + auto t = sk_make_sp(std::forward(args)...); + if (!localMatrix || localMatrix->isIdentity()) { + return std::move(t); + } + return sk_make_sp(sk_sp(std::move(t)), *localMatrix); + } + + SkLocalMatrixShader(sk_sp wrapped, const SkMatrix& localMatrix) + : fLocalMatrix(localMatrix), fWrappedShader(std::move(wrapped)) {} + + GradientType asGradient(GradientInfo* info, SkMatrix* localMatrix) const override; + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + + sk_sp makeAsALocalMatrixShader(SkMatrix* localMatrix) const override { + if (localMatrix) { + *localMatrix = fLocalMatrix; + } + return fWrappedShader; + } + +protected: + void flatten(SkWriteBuffer&) const override; + +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT + Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override; +#endif + + SkImage* onIsAImage(SkMatrix* matrix, SkTileMode* mode) const override; + + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc*) const override; + +private: + SK_FLATTENABLE_HOOKS(SkLocalMatrixShader) + + SkMatrix fLocalMatrix; + sk_sp fWrappedShader; + + using INHERITED = SkShaderBase; +}; + +#endif diff --git a/gfx/skia/skia/src/shaders/SkPerlinNoiseShader.cpp b/gfx/skia/skia/src/shaders/SkPerlinNoiseShader.cpp new file mode 100644 index 0000000000..9042e91574 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkPerlinNoiseShader.cpp @@ -0,0 +1,1149 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/effects/SkPerlinNoiseShader.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkColorFilter.h" +#include "include/core/SkShader.h" +#include "include/core/SkString.h" +#include "include/core/SkUnPreMultiply.h" +#include "include/private/base/SkTPin.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/KeyBuilder.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrProcessorUnitTest.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/effects/GrMatrixEffect.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/gpu/ganesh/glsl/GrGLSLFragmentShaderBuilder.h" +#include "src/gpu/ganesh/glsl/GrGLSLProgramDataManager.h" +#include "src/gpu/ganesh/glsl/GrGLSLUniformHandler.h" +#endif // SK_GANESH + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/Log.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#include "src/gpu/graphite/RecorderPriv.h" +#include "src/gpu/graphite/TextureProxyView.h" +#include "src/image/SkImage_Base.h" +#endif // SK_GRAPHITE + +static const int kBlockSize = 256; +static const int kBlockMask = kBlockSize - 1; +static const int kPerlinNoise = 4096; +static const int kRandMaximum = SK_MaxS32; // 2**31 - 1 + +class SkPerlinNoiseShaderImpl : public SkShaderBase { +public: + struct StitchData { + StitchData() + : fWidth(0) + , fWrapX(0) + , fHeight(0) + , fWrapY(0) + {} + + StitchData(SkScalar w, SkScalar h) + : fWidth(std::min(SkScalarRoundToInt(w), SK_MaxS32 - kPerlinNoise)) + , fWrapX(kPerlinNoise + fWidth) + , fHeight(std::min(SkScalarRoundToInt(h), SK_MaxS32 - kPerlinNoise)) + , fWrapY(kPerlinNoise + fHeight) {} + + bool operator==(const StitchData& other) const { + return fWidth == other.fWidth && + fWrapX == other.fWrapX && + fHeight == other.fHeight && + fWrapY == other.fWrapY; + } + + int fWidth; // How much to subtract to wrap for stitching. + int fWrapX; // Minimum value to wrap. + int fHeight; + int fWrapY; + }; + + struct PaintingData { + PaintingData(const SkISize& tileSize, SkScalar seed, + SkScalar baseFrequencyX, SkScalar baseFrequencyY, + const SkMatrix& matrix) + { + SkVector tileVec; + matrix.mapVector(SkIntToScalar(tileSize.fWidth), SkIntToScalar(tileSize.fHeight), + &tileVec); + + SkSize scale; + if (!matrix.decomposeScale(&scale, nullptr)) { + scale.set(SK_ScalarNearlyZero, SK_ScalarNearlyZero); + } + fBaseFrequency.set(baseFrequencyX * SkScalarInvert(scale.width()), + baseFrequencyY * SkScalarInvert(scale.height())); + fTileSize.set(SkScalarRoundToInt(tileVec.fX), SkScalarRoundToInt(tileVec.fY)); + this->init(seed); + if (!fTileSize.isEmpty()) { + this->stitch(); + } + + #if defined(SK_GANESH) || defined(SK_GRAPHITE) + SkImageInfo info = SkImageInfo::MakeA8(kBlockSize, 1); + fPermutationsBitmap.installPixels(info, fLatticeSelector, info.minRowBytes()); + fPermutationsBitmap.setImmutable(); + + info = SkImageInfo::Make(kBlockSize, 4, kRGBA_8888_SkColorType, kPremul_SkAlphaType); + fNoiseBitmap.installPixels(info, fNoise[0][0], info.minRowBytes()); + fNoiseBitmap.setImmutable(); + #endif + } + + #if defined(SK_GANESH) || defined(SK_GRAPHITE) + PaintingData(const PaintingData& that) + : fSeed(that.fSeed) + , fTileSize(that.fTileSize) + , fBaseFrequency(that.fBaseFrequency) + , fStitchDataInit(that.fStitchDataInit) + , fPermutationsBitmap(that.fPermutationsBitmap) + , fNoiseBitmap(that.fNoiseBitmap) { + memcpy(fLatticeSelector, that.fLatticeSelector, sizeof(fLatticeSelector)); + memcpy(fNoise, that.fNoise, sizeof(fNoise)); + memcpy(fGradient, that.fGradient, sizeof(fGradient)); + } + #endif + + int fSeed; + uint8_t fLatticeSelector[kBlockSize]; + uint16_t fNoise[4][kBlockSize][2]; + SkPoint fGradient[4][kBlockSize]; + SkISize fTileSize; + SkVector fBaseFrequency; + StitchData fStitchDataInit; + + private: + + #if defined(SK_GANESH) || defined(SK_GRAPHITE) + SkBitmap fPermutationsBitmap; + SkBitmap fNoiseBitmap; + #endif + + inline int random() { + // See https://www.w3.org/TR/SVG11/filters.html#feTurbulenceElement + // m = kRandMaximum, 2**31 - 1 (2147483647) + static constexpr int kRandAmplitude = 16807; // 7**5; primitive root of m + static constexpr int kRandQ = 127773; // m / a + static constexpr int kRandR = 2836; // m % a + + int result = kRandAmplitude * (fSeed % kRandQ) - kRandR * (fSeed / kRandQ); + if (result <= 0) { + result += kRandMaximum; + } + fSeed = result; + return result; + } + + // Only called once. Could be part of the constructor. + void init(SkScalar seed) { + // According to the SVG spec, we must truncate (not round) the seed value. + fSeed = SkScalarTruncToInt(seed); + // The seed value clamp to the range [1, kRandMaximum - 1]. + if (fSeed <= 0) { + fSeed = -(fSeed % (kRandMaximum - 1)) + 1; + } + if (fSeed > kRandMaximum - 1) { + fSeed = kRandMaximum - 1; + } + for (int channel = 0; channel < 4; ++channel) { + for (int i = 0; i < kBlockSize; ++i) { + fLatticeSelector[i] = i; + fNoise[channel][i][0] = (random() % (2 * kBlockSize)); + fNoise[channel][i][1] = (random() % (2 * kBlockSize)); + } + } + for (int i = kBlockSize - 1; i > 0; --i) { + int k = fLatticeSelector[i]; + int j = random() % kBlockSize; + SkASSERT(j >= 0); + SkASSERT(j < kBlockSize); + fLatticeSelector[i] = fLatticeSelector[j]; + fLatticeSelector[j] = k; + } + + // Perform the permutations now + { + // Copy noise data + uint16_t noise[4][kBlockSize][2]; + for (int i = 0; i < kBlockSize; ++i) { + for (int channel = 0; channel < 4; ++channel) { + for (int j = 0; j < 2; ++j) { + noise[channel][i][j] = fNoise[channel][i][j]; + } + } + } + // Do permutations on noise data + for (int i = 0; i < kBlockSize; ++i) { + for (int channel = 0; channel < 4; ++channel) { + for (int j = 0; j < 2; ++j) { + fNoise[channel][i][j] = noise[channel][fLatticeSelector[i]][j]; + } + } + } + } + + // Half of the largest possible value for 16 bit unsigned int + static constexpr SkScalar kHalfMax16bits = 32767.5f; + + // Compute gradients from permuted noise data + static constexpr SkScalar kInvBlockSizef = 1.0 / SkIntToScalar(kBlockSize); + for (int channel = 0; channel < 4; ++channel) { + for (int i = 0; i < kBlockSize; ++i) { + fGradient[channel][i] = SkPoint::Make( + (fNoise[channel][i][0] - kBlockSize) * kInvBlockSizef, + (fNoise[channel][i][1] - kBlockSize) * kInvBlockSizef); + fGradient[channel][i].normalize(); + // Put the normalized gradient back into the noise data + fNoise[channel][i][0] = + SkScalarRoundToInt((fGradient[channel][i].fX + 1) * kHalfMax16bits); + fNoise[channel][i][1] = + SkScalarRoundToInt((fGradient[channel][i].fY + 1) * kHalfMax16bits); + } + } + } + + // Only called once. Could be part of the constructor. + void stitch() { + SkScalar tileWidth = SkIntToScalar(fTileSize.width()); + SkScalar tileHeight = SkIntToScalar(fTileSize.height()); + SkASSERT(tileWidth > 0 && tileHeight > 0); + // When stitching tiled turbulence, the frequencies must be adjusted + // so that the tile borders will be continuous. + if (fBaseFrequency.fX) { + SkScalar lowFrequencx = + SkScalarFloorToScalar(tileWidth * fBaseFrequency.fX) / tileWidth; + SkScalar highFrequencx = + SkScalarCeilToScalar(tileWidth * fBaseFrequency.fX) / tileWidth; + // BaseFrequency should be non-negative according to the standard. + // lowFrequencx can be 0 if fBaseFrequency.fX is very small. + if (sk_ieee_float_divide(fBaseFrequency.fX, lowFrequencx) < highFrequencx / fBaseFrequency.fX) { + fBaseFrequency.fX = lowFrequencx; + } else { + fBaseFrequency.fX = highFrequencx; + } + } + if (fBaseFrequency.fY) { + SkScalar lowFrequency = + SkScalarFloorToScalar(tileHeight * fBaseFrequency.fY) / tileHeight; + SkScalar highFrequency = + SkScalarCeilToScalar(tileHeight * fBaseFrequency.fY) / tileHeight; + // lowFrequency can be 0 if fBaseFrequency.fY is very small. + if (sk_ieee_float_divide(fBaseFrequency.fY, lowFrequency) < highFrequency / fBaseFrequency.fY) { + fBaseFrequency.fY = lowFrequency; + } else { + fBaseFrequency.fY = highFrequency; + } + } + fStitchDataInit = StitchData(tileWidth * fBaseFrequency.fX, + tileHeight * fBaseFrequency.fY); + } + + public: + +#if defined(SK_GANESH) || defined(SK_GRAPHITE) + const SkBitmap& getPermutationsBitmap() const { return fPermutationsBitmap; } + + const SkBitmap& getNoiseBitmap() const { return fNoiseBitmap; } +#endif + }; + + /** + * About the noise types : the difference between the first 2 is just minor tweaks to the + * algorithm, they're not 2 entirely different noises. The output looks different, but once the + * noise is generated in the [1, -1] range, the output is brought back in the [0, 1] range by + * doing : + * kFractalNoise_Type : noise * 0.5 + 0.5 + * kTurbulence_Type : abs(noise) + * Very little differs between the 2 types, although you can tell the difference visually. + */ + enum Type { + kFractalNoise_Type, + kTurbulence_Type, + kLast_Type = kTurbulence_Type + }; + + static const int kMaxOctaves = 255; // numOctaves must be <= 0 and <= kMaxOctaves + + SkPerlinNoiseShaderImpl(SkPerlinNoiseShaderImpl::Type type, SkScalar baseFrequencyX, + SkScalar baseFrequencyY, int numOctaves, SkScalar seed, + const SkISize* tileSize); + + class PerlinNoiseShaderContext : public Context { + public: + PerlinNoiseShaderContext(const SkPerlinNoiseShaderImpl& shader, const ContextRec&); + + void shadeSpan(int x, int y, SkPMColor[], int count) override; + + private: + SkPMColor shade(const SkPoint& point, StitchData& stitchData) const; + SkScalar calculateTurbulenceValueForPoint(int channel, + StitchData& stitchData, + const SkPoint& point) const; + SkScalar noise2D(int channel, + const StitchData& stitchData, + const SkPoint& noiseVector) const; + + SkMatrix fMatrix; + PaintingData fPaintingData; + + using INHERITED = Context; + }; + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + + skvm::Color program(skvm::Builder*, + skvm::Coord, + skvm::Coord, + skvm::Color, + const MatrixRec&, + const SkColorInfo&, + skvm::Uniforms*, + SkArenaAlloc*) const override { + // TODO? + return {}; + } + +protected: + void flatten(SkWriteBuffer&) const override; +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT + Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override; +#endif + +private: + SK_FLATTENABLE_HOOKS(SkPerlinNoiseShaderImpl) + + const SkPerlinNoiseShaderImpl::Type fType; + const SkScalar fBaseFrequencyX; + const SkScalar fBaseFrequencyY; + const int fNumOctaves; + const SkScalar fSeed; + const SkISize fTileSize; + const bool fStitchTiles; + + friend class ::SkPerlinNoiseShader; + + using INHERITED = SkShaderBase; +}; + +namespace { + +// noiseValue is the color component's value (or color) +// limitValue is the maximum perlin noise array index value allowed +// newValue is the current noise dimension (either width or height) +inline int checkNoise(int noiseValue, int limitValue, int newValue) { + // If the noise value would bring us out of bounds of the current noise array while we are + // stiching noise tiles together, wrap the noise around the current dimension of the noise to + // stay within the array bounds in a continuous fashion (so that tiling lines are not visible) + if (noiseValue >= limitValue) { + noiseValue -= newValue; + } + return noiseValue; +} + +inline SkScalar smoothCurve(SkScalar t) { + return t * t * (3 - 2 * t); +} + +} // end namespace + +SkPerlinNoiseShaderImpl::SkPerlinNoiseShaderImpl(SkPerlinNoiseShaderImpl::Type type, + SkScalar baseFrequencyX, + SkScalar baseFrequencyY, + int numOctaves, + SkScalar seed, + const SkISize* tileSize) + : fType(type) + , fBaseFrequencyX(baseFrequencyX) + , fBaseFrequencyY(baseFrequencyY) + , fNumOctaves(numOctaves > kMaxOctaves ? kMaxOctaves : numOctaves) //[0,255] octaves allowed + , fSeed(seed) + , fTileSize(nullptr == tileSize ? SkISize::Make(0, 0) : *tileSize) + , fStitchTiles(!fTileSize.isEmpty()) { + SkASSERT(numOctaves >= 0 && numOctaves <= kMaxOctaves); + SkASSERT(fBaseFrequencyX >= 0); + SkASSERT(fBaseFrequencyY >= 0); +} + +sk_sp SkPerlinNoiseShaderImpl::CreateProc(SkReadBuffer& buffer) { + Type type = buffer.read32LE(kLast_Type); + + SkScalar freqX = buffer.readScalar(); + SkScalar freqY = buffer.readScalar(); + int octaves = buffer.read32LE(kMaxOctaves); + + SkScalar seed = buffer.readScalar(); + SkISize tileSize; + tileSize.fWidth = buffer.readInt(); + tileSize.fHeight = buffer.readInt(); + + switch (type) { + case kFractalNoise_Type: + return SkPerlinNoiseShader::MakeFractalNoise(freqX, freqY, octaves, seed, &tileSize); + case kTurbulence_Type: + return SkPerlinNoiseShader::MakeTurbulence(freqX, freqY, octaves, seed, &tileSize); + default: + // Really shouldn't get here b.c. of earlier check on type + buffer.validate(false); + return nullptr; + } +} + +void SkPerlinNoiseShaderImpl::flatten(SkWriteBuffer& buffer) const { + buffer.writeInt((int) fType); + buffer.writeScalar(fBaseFrequencyX); + buffer.writeScalar(fBaseFrequencyY); + buffer.writeInt(fNumOctaves); + buffer.writeScalar(fSeed); + buffer.writeInt(fTileSize.fWidth); + buffer.writeInt(fTileSize.fHeight); +} + +SkScalar SkPerlinNoiseShaderImpl::PerlinNoiseShaderContext::noise2D( + int channel, const StitchData& stitchData, const SkPoint& noiseVector) const { + struct Noise { + int noisePositionIntegerValue; + int nextNoisePositionIntegerValue; + SkScalar noisePositionFractionValue; + Noise(SkScalar component) + { + SkScalar position = component + kPerlinNoise; + noisePositionIntegerValue = SkScalarFloorToInt(position); + noisePositionFractionValue = position - SkIntToScalar(noisePositionIntegerValue); + nextNoisePositionIntegerValue = noisePositionIntegerValue + 1; + } + }; + Noise noiseX(noiseVector.x()); + Noise noiseY(noiseVector.y()); + SkScalar u, v; + const SkPerlinNoiseShaderImpl& perlinNoiseShader = static_cast(fShader); + // If stitching, adjust lattice points accordingly. + if (perlinNoiseShader.fStitchTiles) { + noiseX.noisePositionIntegerValue = + checkNoise(noiseX.noisePositionIntegerValue, stitchData.fWrapX, stitchData.fWidth); + noiseY.noisePositionIntegerValue = + checkNoise(noiseY.noisePositionIntegerValue, stitchData.fWrapY, stitchData.fHeight); + noiseX.nextNoisePositionIntegerValue = + checkNoise(noiseX.nextNoisePositionIntegerValue, stitchData.fWrapX, stitchData.fWidth); + noiseY.nextNoisePositionIntegerValue = + checkNoise(noiseY.nextNoisePositionIntegerValue, stitchData.fWrapY, stitchData.fHeight); + } + noiseX.noisePositionIntegerValue &= kBlockMask; + noiseY.noisePositionIntegerValue &= kBlockMask; + noiseX.nextNoisePositionIntegerValue &= kBlockMask; + noiseY.nextNoisePositionIntegerValue &= kBlockMask; + int i = fPaintingData.fLatticeSelector[noiseX.noisePositionIntegerValue]; + int j = fPaintingData.fLatticeSelector[noiseX.nextNoisePositionIntegerValue]; + int b00 = (i + noiseY.noisePositionIntegerValue) & kBlockMask; + int b10 = (j + noiseY.noisePositionIntegerValue) & kBlockMask; + int b01 = (i + noiseY.nextNoisePositionIntegerValue) & kBlockMask; + int b11 = (j + noiseY.nextNoisePositionIntegerValue) & kBlockMask; + SkScalar sx = smoothCurve(noiseX.noisePositionFractionValue); + SkScalar sy = smoothCurve(noiseY.noisePositionFractionValue); + + if (sx < 0 || sy < 0 || sx > 1 || sy > 1) { + return 0; // Check for pathological inputs. + } + + // This is taken 1:1 from SVG spec: http://www.w3.org/TR/SVG11/filters.html#feTurbulenceElement + SkPoint fractionValue = SkPoint::Make(noiseX.noisePositionFractionValue, + noiseY.noisePositionFractionValue); // Offset (0,0) + u = fPaintingData.fGradient[channel][b00].dot(fractionValue); + fractionValue.fX -= SK_Scalar1; // Offset (-1,0) + v = fPaintingData.fGradient[channel][b10].dot(fractionValue); + SkScalar a = SkScalarInterp(u, v, sx); + fractionValue.fY -= SK_Scalar1; // Offset (-1,-1) + v = fPaintingData.fGradient[channel][b11].dot(fractionValue); + fractionValue.fX = noiseX.noisePositionFractionValue; // Offset (0,-1) + u = fPaintingData.fGradient[channel][b01].dot(fractionValue); + SkScalar b = SkScalarInterp(u, v, sx); + return SkScalarInterp(a, b, sy); +} + +SkScalar SkPerlinNoiseShaderImpl::PerlinNoiseShaderContext::calculateTurbulenceValueForPoint( + int channel, StitchData& stitchData, const SkPoint& point) const { + const SkPerlinNoiseShaderImpl& perlinNoiseShader = static_cast(fShader); + if (perlinNoiseShader.fStitchTiles) { + stitchData = fPaintingData.fStitchDataInit; + } + SkScalar turbulenceFunctionResult = 0; + SkPoint noiseVector(SkPoint::Make(point.x() * fPaintingData.fBaseFrequency.fX, + point.y() * fPaintingData.fBaseFrequency.fY)); + SkScalar ratio = SK_Scalar1; + for (int octave = 0; octave < perlinNoiseShader.fNumOctaves; ++octave) { + SkScalar noise = noise2D(channel, stitchData, noiseVector); + SkScalar numer = (perlinNoiseShader.fType == kFractalNoise_Type) ? + noise : SkScalarAbs(noise); + turbulenceFunctionResult += numer / ratio; + noiseVector.fX *= 2; + noiseVector.fY *= 2; + ratio *= 2; + if (perlinNoiseShader.fStitchTiles) { + stitchData = StitchData(SkIntToScalar(stitchData.fWidth) * 2, + SkIntToScalar(stitchData.fHeight) * 2); + } + } + + if (perlinNoiseShader.fType == kFractalNoise_Type) { + // For kFractalNoise the result is: noise[-1,1] * 0.5 + 0.5 + turbulenceFunctionResult = SkScalarHalf(turbulenceFunctionResult + 1); + } + + if (channel == 3) { // Scale alpha by paint value + turbulenceFunctionResult *= SkIntToScalar(getPaintAlpha()) / 255; + } + + // Clamp result + return SkTPin(turbulenceFunctionResult, 0.0f, SK_Scalar1); +} + +//////////////////////////////////////////////////////////////////////////////////////////////////// + +SkPMColor SkPerlinNoiseShaderImpl::PerlinNoiseShaderContext::shade( + const SkPoint& point, StitchData& stitchData) const { + SkPoint newPoint; + fMatrix.mapPoints(&newPoint, &point, 1); + newPoint.fX = SkScalarRoundToScalar(newPoint.fX); + newPoint.fY = SkScalarRoundToScalar(newPoint.fY); + + U8CPU rgba[4]; + for (int channel = 3; channel >= 0; --channel) { + SkScalar value; + value = calculateTurbulenceValueForPoint(channel, stitchData, newPoint); + rgba[channel] = SkScalarFloorToInt(255 * value); + } + return SkPreMultiplyARGB(rgba[3], rgba[0], rgba[1], rgba[2]); +} + +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT +SkShaderBase::Context* SkPerlinNoiseShaderImpl::onMakeContext(const ContextRec& rec, + SkArenaAlloc* alloc) const { + // should we pay attention to rec's device-colorspace? + return alloc->make(*this, rec); +} +#endif + +static inline SkMatrix total_matrix(const SkShaderBase::ContextRec& rec, + const SkShaderBase& shader) { + if (rec.fLocalMatrix) { + return SkMatrix::Concat(*rec.fMatrix, *rec.fLocalMatrix); + } + return *rec.fMatrix; +} + +SkPerlinNoiseShaderImpl::PerlinNoiseShaderContext::PerlinNoiseShaderContext( + const SkPerlinNoiseShaderImpl& shader, const ContextRec& rec) + : INHERITED(shader, rec) + , fMatrix(total_matrix(rec, shader)) // used for temp storage, adjusted below + , fPaintingData(shader.fTileSize, shader.fSeed, shader.fBaseFrequencyX, + shader.fBaseFrequencyY, fMatrix) +{ + // This (1,1) translation is due to WebKit's 1 based coordinates for the noise + // (as opposed to 0 based, usually). The same adjustment is in the setData() function. + fMatrix.setTranslate(-fMatrix.getTranslateX() + SK_Scalar1, + -fMatrix.getTranslateY() + SK_Scalar1); +} + +void SkPerlinNoiseShaderImpl::PerlinNoiseShaderContext::shadeSpan( + int x, int y, SkPMColor result[], int count) { + SkPoint point = SkPoint::Make(SkIntToScalar(x), SkIntToScalar(y)); + StitchData stitchData; + for (int i = 0; i < count; ++i) { + result[i] = shade(point, stitchData); + point.fX += SK_Scalar1; + } +} + +///////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +class GrPerlinNoise2Effect : public GrFragmentProcessor { +public: + static std::unique_ptr Make( + SkPerlinNoiseShaderImpl::Type type, + int numOctaves, + bool stitchTiles, + std::unique_ptr paintingData, + GrSurfaceProxyView permutationsView, + GrSurfaceProxyView noiseView, + const GrCaps& caps) { + static constexpr GrSamplerState kRepeatXSampler = {GrSamplerState::WrapMode::kRepeat, + GrSamplerState::WrapMode::kClamp, + GrSamplerState::Filter::kNearest}; + auto permutationsFP = + GrTextureEffect::Make(std::move(permutationsView), kPremul_SkAlphaType, + SkMatrix::I(), kRepeatXSampler, caps); + auto noiseFP = GrTextureEffect::Make(std::move(noiseView), kPremul_SkAlphaType, + SkMatrix::I(), kRepeatXSampler, caps); + + return std::unique_ptr( + new GrPerlinNoise2Effect(type, + numOctaves, + stitchTiles, + std::move(paintingData), + std::move(permutationsFP), + std::move(noiseFP))); + } + + const char* name() const override { return "PerlinNoise"; } + + std::unique_ptr clone() const override { + return std::unique_ptr(new GrPerlinNoise2Effect(*this)); + } + + const SkPerlinNoiseShaderImpl::StitchData& stitchData() const { return fPaintingData->fStitchDataInit; } + + SkPerlinNoiseShaderImpl::Type type() const { return fType; } + bool stitchTiles() const { return fStitchTiles; } + const SkVector& baseFrequency() const { return fPaintingData->fBaseFrequency; } + int numOctaves() const { return fNumOctaves; } + +private: + class Impl : public ProgramImpl { + public: + SkString emitHelper(EmitArgs& args); + void emitCode(EmitArgs&) override; + + private: + void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override; + + GrGLSLProgramDataManager::UniformHandle fStitchDataUni; + GrGLSLProgramDataManager::UniformHandle fBaseFrequencyUni; + }; + + std::unique_ptr onMakeProgramImpl() const override { + return std::make_unique(); + } + + void onAddToKey(const GrShaderCaps& caps, skgpu::KeyBuilder* b) const override; + + bool onIsEqual(const GrFragmentProcessor& sBase) const override { + const GrPerlinNoise2Effect& s = sBase.cast(); + return fType == s.fType && + fPaintingData->fBaseFrequency == s.fPaintingData->fBaseFrequency && + fNumOctaves == s.fNumOctaves && + fStitchTiles == s.fStitchTiles && + fPaintingData->fStitchDataInit == s.fPaintingData->fStitchDataInit; + } + + GrPerlinNoise2Effect(SkPerlinNoiseShaderImpl::Type type, + int numOctaves, + bool stitchTiles, + std::unique_ptr paintingData, + std::unique_ptr permutationsFP, + std::unique_ptr noiseFP) + : INHERITED(kGrPerlinNoise2Effect_ClassID, kNone_OptimizationFlags) + , fType(type) + , fNumOctaves(numOctaves) + , fStitchTiles(stitchTiles) + , fPaintingData(std::move(paintingData)) { + this->registerChild(std::move(permutationsFP), SkSL::SampleUsage::Explicit()); + this->registerChild(std::move(noiseFP), SkSL::SampleUsage::Explicit()); + this->setUsesSampleCoordsDirectly(); + } + + GrPerlinNoise2Effect(const GrPerlinNoise2Effect& that) + : INHERITED(that) + , fType(that.fType) + , fNumOctaves(that.fNumOctaves) + , fStitchTiles(that.fStitchTiles) + , fPaintingData(new SkPerlinNoiseShaderImpl::PaintingData(*that.fPaintingData)) {} + + GR_DECLARE_FRAGMENT_PROCESSOR_TEST + + SkPerlinNoiseShaderImpl::Type fType; + int fNumOctaves; + bool fStitchTiles; + + std::unique_ptr fPaintingData; + + using INHERITED = GrFragmentProcessor; +}; + +///////////////////////////////////////////////////////////////////// +GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrPerlinNoise2Effect) + +#if GR_TEST_UTILS +std::unique_ptr GrPerlinNoise2Effect::TestCreate(GrProcessorTestData* d) { + int numOctaves = d->fRandom->nextRangeU(2, 10); + bool stitchTiles = d->fRandom->nextBool(); + SkScalar seed = SkIntToScalar(d->fRandom->nextU()); + SkISize tileSize; + tileSize.fWidth = d->fRandom->nextRangeU(4, 4096); + tileSize.fHeight = d->fRandom->nextRangeU(4, 4096); + SkScalar baseFrequencyX = d->fRandom->nextRangeScalar(0.01f, 0.99f); + SkScalar baseFrequencyY = d->fRandom->nextRangeScalar(0.01f, 0.99f); + + sk_sp shader(d->fRandom->nextBool() ? + SkPerlinNoiseShader::MakeFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves, seed, + stitchTiles ? &tileSize : nullptr) : + SkPerlinNoiseShader::MakeTurbulence(baseFrequencyX, baseFrequencyY, numOctaves, seed, + stitchTiles ? &tileSize : nullptr)); + + GrTest::TestAsFPArgs asFPArgs(d); + return as_SB(shader)->asRootFragmentProcessor(asFPArgs.args(), GrTest::TestMatrix(d->fRandom)); +} +#endif + +SkString GrPerlinNoise2Effect::Impl::emitHelper(EmitArgs& args) { + const GrPerlinNoise2Effect& pne = args.fFp.cast(); + + GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; + + // Add noise function + const GrShaderVar gPerlinNoiseArgs[] = {{"chanCoord", SkSLType::kHalf }, + {"noiseVec ", SkSLType::kHalf2}}; + + const GrShaderVar gPerlinNoiseStitchArgs[] = {{"chanCoord" , SkSLType::kHalf }, + {"noiseVec" , SkSLType::kHalf2}, + {"stitchData", SkSLType::kHalf2}}; + + SkString noiseCode; + + noiseCode.append( + "half4 floorVal;" + "floorVal.xy = floor(noiseVec);" + "floorVal.zw = floorVal.xy + half2(1);" + "half2 fractVal = fract(noiseVec);" + + // smooth curve : t^2*(3 - 2*t) + "half2 noiseSmooth = fractVal*fractVal*(half2(3) - 2*fractVal);" + ); + + // Adjust frequencies if we're stitching tiles + if (pne.stitchTiles()) { + noiseCode.append( + "if (floorVal.x >= stitchData.x) { floorVal.x -= stitchData.x; };" + "if (floorVal.y >= stitchData.y) { floorVal.y -= stitchData.y; };" + "if (floorVal.z >= stitchData.x) { floorVal.z -= stitchData.x; };" + "if (floorVal.w >= stitchData.y) { floorVal.w -= stitchData.y; };" + ); + } + + // NOTE: We need to explicitly pass half4(1) as input color here, because the helper function + // can't see fInputColor (which is "_input" in the FP's outer function). skbug.com/10506 + SkString sampleX = this->invokeChild(0, "half4(1)", args, "half2(floorVal.x, 0.5)"); + SkString sampleY = this->invokeChild(0, "half4(1)", args, "half2(floorVal.z, 0.5)"); + noiseCode.appendf("half2 latticeIdx = half2(%s.a, %s.a);", sampleX.c_str(), sampleY.c_str()); + +#if defined(SK_BUILD_FOR_ANDROID) + // Android rounding for Tegra devices, like, for example: Xoom (Tegra 2), Nexus 7 (Tegra 3). + // The issue is that colors aren't accurate enough on Tegra devices. For example, if an 8 bit + // value of 124 (or 0.486275 here) is entered, we can get a texture value of 123.513725 + // (or 0.484368 here). The following rounding operation prevents these precision issues from + // affecting the result of the noise by making sure that we only have multiples of 1/255. + // (Note that 1/255 is about 0.003921569, which is the value used here). + noiseCode.append( + "latticeIdx = floor(latticeIdx * half2(255.0) + half2(0.5)) * half2(0.003921569);"); +#endif + + // Get (x,y) coordinates with the permuted x + noiseCode.append("half4 bcoords = 256*latticeIdx.xyxy + floorVal.yyww;"); + + noiseCode.append("half2 uv;"); + + // This is the math to convert the two 16bit integer packed into rgba 8 bit input into a + // [-1,1] vector and perform a dot product between that vector and the provided vector. + // Save it as a string because we will repeat it 4x. + static constexpr const char* inc8bit = "0.00390625"; // 1.0 / 256.0 + SkString dotLattice = + SkStringPrintf("dot((lattice.ga + lattice.rb*%s)*2 - half2(1), fractVal)", inc8bit); + + SkString sampleA = this->invokeChild(1, "half4(1)", args, "half2(bcoords.x, chanCoord)"); + SkString sampleB = this->invokeChild(1, "half4(1)", args, "half2(bcoords.y, chanCoord)"); + SkString sampleC = this->invokeChild(1, "half4(1)", args, "half2(bcoords.w, chanCoord)"); + SkString sampleD = this->invokeChild(1, "half4(1)", args, "half2(bcoords.z, chanCoord)"); + + // Compute u, at offset (0,0) + noiseCode.appendf("half4 lattice = %s;", sampleA.c_str()); + noiseCode.appendf("uv.x = %s;", dotLattice.c_str()); + + // Compute v, at offset (-1,0) + noiseCode.append("fractVal.x -= 1.0;"); + noiseCode.appendf("lattice = %s;", sampleB.c_str()); + noiseCode.appendf("uv.y = %s;", dotLattice.c_str()); + + // Compute 'a' as a linear interpolation of 'u' and 'v' + noiseCode.append("half2 ab;"); + noiseCode.append("ab.x = mix(uv.x, uv.y, noiseSmooth.x);"); + + // Compute v, at offset (-1,-1) + noiseCode.append("fractVal.y -= 1.0;"); + noiseCode.appendf("lattice = %s;", sampleC.c_str()); + noiseCode.appendf("uv.y = %s;", dotLattice.c_str()); + + // Compute u, at offset (0,-1) + noiseCode.append("fractVal.x += 1.0;"); + noiseCode.appendf("lattice = %s;", sampleD.c_str()); + noiseCode.appendf("uv.x = %s;", dotLattice.c_str()); + + // Compute 'b' as a linear interpolation of 'u' and 'v' + noiseCode.append("ab.y = mix(uv.x, uv.y, noiseSmooth.x);"); + // Compute the noise as a linear interpolation of 'a' and 'b' + noiseCode.append("return mix(ab.x, ab.y, noiseSmooth.y);"); + + SkString noiseFuncName = fragBuilder->getMangledFunctionName("noiseFuncName"); + if (pne.stitchTiles()) { + fragBuilder->emitFunction(SkSLType::kHalf, noiseFuncName.c_str(), + {gPerlinNoiseStitchArgs, std::size(gPerlinNoiseStitchArgs)}, + noiseCode.c_str()); + } else { + fragBuilder->emitFunction(SkSLType::kHalf, noiseFuncName.c_str(), + {gPerlinNoiseArgs, std::size(gPerlinNoiseArgs)}, + noiseCode.c_str()); + } + + return noiseFuncName; +} + +void GrPerlinNoise2Effect::Impl::emitCode(EmitArgs& args) { + + SkString noiseFuncName = this->emitHelper(args); + + const GrPerlinNoise2Effect& pne = args.fFp.cast(); + + GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; + GrGLSLUniformHandler* uniformHandler = args.fUniformHandler; + + fBaseFrequencyUni = uniformHandler->addUniform(&pne, kFragment_GrShaderFlag, SkSLType::kHalf2, + "baseFrequency"); + const char* baseFrequencyUni = uniformHandler->getUniformCStr(fBaseFrequencyUni); + + const char* stitchDataUni = nullptr; + if (pne.stitchTiles()) { + fStitchDataUni = uniformHandler->addUniform(&pne, kFragment_GrShaderFlag, SkSLType::kHalf2, + "stitchData"); + stitchDataUni = uniformHandler->getUniformCStr(fStitchDataUni); + } + + // There are rounding errors if the floor operation is not performed here + fragBuilder->codeAppendf("half2 noiseVec = half2(floor(%s.xy) * %s);", + args.fSampleCoord, baseFrequencyUni); + + // Clear the color accumulator + fragBuilder->codeAppendf("half4 color = half4(0);"); + + if (pne.stitchTiles()) { + fragBuilder->codeAppendf("half2 stitchData = %s;", stitchDataUni); + } + + fragBuilder->codeAppendf("half ratio = 1.0;"); + + // Loop over all octaves + fragBuilder->codeAppendf("for (int octave = 0; octave < %d; ++octave) {", pne.numOctaves()); + fragBuilder->codeAppendf( "color += "); + if (pne.type() != SkPerlinNoiseShaderImpl::kFractalNoise_Type) { + fragBuilder->codeAppend("abs("); + } + + // There are 4 lines, put y coords at center of each. + static constexpr const char* chanCoordR = "0.5"; + static constexpr const char* chanCoordG = "1.5"; + static constexpr const char* chanCoordB = "2.5"; + static constexpr const char* chanCoordA = "3.5"; + if (pne.stitchTiles()) { + fragBuilder->codeAppendf( + "half4(%s(%s, noiseVec, stitchData), %s(%s, noiseVec, stitchData)," + "%s(%s, noiseVec, stitchData), %s(%s, noiseVec, stitchData))", + noiseFuncName.c_str(), chanCoordR, + noiseFuncName.c_str(), chanCoordG, + noiseFuncName.c_str(), chanCoordB, + noiseFuncName.c_str(), chanCoordA); + } else { + fragBuilder->codeAppendf( + "half4(%s(%s, noiseVec), %s(%s, noiseVec)," + "%s(%s, noiseVec), %s(%s, noiseVec))", + noiseFuncName.c_str(), chanCoordR, + noiseFuncName.c_str(), chanCoordG, + noiseFuncName.c_str(), chanCoordB, + noiseFuncName.c_str(), chanCoordA); + } + if (pne.type() != SkPerlinNoiseShaderImpl::kFractalNoise_Type) { + fragBuilder->codeAppend(")"); // end of "abs(" + } + fragBuilder->codeAppend(" * ratio;"); + + fragBuilder->codeAppend("noiseVec *= half2(2.0);" + "ratio *= 0.5;"); + + if (pne.stitchTiles()) { + fragBuilder->codeAppend("stitchData *= half2(2.0);"); + } + fragBuilder->codeAppend("}"); // end of the for loop on octaves + + if (pne.type() == SkPerlinNoiseShaderImpl::kFractalNoise_Type) { + // The value of turbulenceFunctionResult comes from ((turbulenceFunctionResult) + 1) / 2 + // by fractalNoise and (turbulenceFunctionResult) by turbulence. + fragBuilder->codeAppendf("color = color * half4(0.5) + half4(0.5);"); + } + + // Clamp values + fragBuilder->codeAppendf("color = saturate(color);"); + + // Pre-multiply the result + fragBuilder->codeAppendf("return half4(color.rgb * color.aaa, color.a);"); +} + +void GrPerlinNoise2Effect::Impl::onSetData(const GrGLSLProgramDataManager& pdman, + const GrFragmentProcessor& processor) { + const GrPerlinNoise2Effect& turbulence = processor.cast(); + + const SkVector& baseFrequency = turbulence.baseFrequency(); + pdman.set2f(fBaseFrequencyUni, baseFrequency.fX, baseFrequency.fY); + + if (turbulence.stitchTiles()) { + const SkPerlinNoiseShaderImpl::StitchData& stitchData = turbulence.stitchData(); + pdman.set2f(fStitchDataUni, + SkIntToScalar(stitchData.fWidth), + SkIntToScalar(stitchData.fHeight)); + } +} + +void GrPerlinNoise2Effect::onAddToKey(const GrShaderCaps& caps, skgpu::KeyBuilder* b) const { + uint32_t key = fNumOctaves; + key = key << 3; // Make room for next 3 bits + switch (fType) { + case SkPerlinNoiseShaderImpl::kFractalNoise_Type: + key |= 0x1; + break; + case SkPerlinNoiseShaderImpl::kTurbulence_Type: + key |= 0x2; + break; + default: + // leave key at 0 + break; + } + if (fStitchTiles) { + key |= 0x4; // Flip the 3rd bit if tile stitching is on + } + b->add32(key); +} + +///////////////////////////////////////////////////////////////////// + +std::unique_ptr SkPerlinNoiseShaderImpl::asFragmentProcessor( + const GrFPArgs& args, const MatrixRec& mRec) const { + SkASSERT(args.fContext); + SkASSERT(fNumOctaves); + + const SkMatrix& totalMatrix = mRec.totalMatrix(); + + // Either we don't stitch tiles, or we have a valid tile size + SkASSERT(!fStitchTiles || !fTileSize.isEmpty()); + + auto paintingData = std::make_unique(fTileSize, + fSeed, + fBaseFrequencyX, + fBaseFrequencyY, + totalMatrix); + + // Like shadeSpan, we start from device space. We will account for that below with a device + // space effect. + + auto context = args.fContext; + + const SkBitmap& permutationsBitmap = paintingData->getPermutationsBitmap(); + const SkBitmap& noiseBitmap = paintingData->getNoiseBitmap(); + + auto permutationsView = std::get<0>(GrMakeCachedBitmapProxyView( + context, + permutationsBitmap, + /*label=*/"PerlinNoiseShader_FragmentProcessor_PermutationsView")); + auto noiseView = std::get<0>(GrMakeCachedBitmapProxyView( + context, noiseBitmap, /*label=*/"PerlinNoiseShader_FragmentProcessor_NoiseView")); + + if (permutationsView && noiseView) { + return GrFragmentProcessor::DeviceSpace( + GrMatrixEffect::Make(SkMatrix::Translate(1 - totalMatrix.getTranslateX(), + 1 - totalMatrix.getTranslateY()), + GrPerlinNoise2Effect::Make(fType, + fNumOctaves, + fStitchTiles, + std::move(paintingData), + std::move(permutationsView), + std::move(noiseView), + *context->priv().caps()))); + } + return nullptr; +} + +#endif + +#if defined(SK_GRAPHITE) + +// If either of these change then the corresponding change must also be made in the SkSL +// perlin_noise_shader function. +static_assert((int)SkPerlinNoiseShaderImpl::kFractalNoise_Type == + (int)skgpu::graphite::PerlinNoiseShaderBlock::Type::kFractalNoise); +static_assert((int)SkPerlinNoiseShaderImpl::kTurbulence_Type == + (int)skgpu::graphite::PerlinNoiseShaderBlock::Type::kTurbulence); + +// If kBlockSize changes here then it must also be changed in the SkSL noise_function +// implementation. +static_assert(kBlockSize == 256); + +void SkPerlinNoiseShaderImpl::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SkASSERT(fNumOctaves); + + SkMatrix totalMatrix = keyContext.local2Dev().asM33(); + if (keyContext.localMatrix()) { + totalMatrix.preConcat(*keyContext.localMatrix()); + } + + SkMatrix invTotal; + bool result = totalMatrix.invert(&invTotal); + if (!result) { + SKGPU_LOG_W("Couldn't invert totalMatrix for PerlinNoiseShader"); + + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, {1, 0, 0, 1}); + builder->endBlock(); + return; + } + + auto paintingData = std::make_unique(fTileSize, + fSeed, + fBaseFrequencyX, + fBaseFrequencyY, + totalMatrix); + + sk_sp permImg = RecorderPriv::CreateCachedImage(keyContext.recorder(), + paintingData->getPermutationsBitmap()); + + sk_sp noiseImg = RecorderPriv::CreateCachedImage(keyContext.recorder(), + paintingData->getNoiseBitmap()); + + if (!permImg || !noiseImg) { + SKGPU_LOG_W("Couldn't create tables for PerlinNoiseShader"); + + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, {1, 0, 0, 1}); + builder->endBlock(); + return; + } + + PerlinNoiseShaderBlock::PerlinNoiseData data(static_cast(fType), + paintingData->fBaseFrequency, + fNumOctaves, + { paintingData->fStitchDataInit.fWidth, + paintingData->fStitchDataInit.fHeight }); + + TextureProxyView view; + + std::tie(view, std::ignore) = as_IB(permImg)->asView(keyContext.recorder(), + skgpu::Mipmapped::kNo); + data.fPermutationsProxy = view.refProxy(); + + std::tie(view, std::ignore) = as_IB(noiseImg)->asView(keyContext.recorder(), + skgpu::Mipmapped::kNo); + data.fNoiseProxy = view.refProxy(); + + // This (1,1) translation is due to WebKit's 1 based coordinates for the noise + // (as opposed to 0 based, usually). Remember: this matrix (shader2World) is going to be + // inverted before being applied. + SkMatrix shader2Local = SkMatrix::Translate(-1 + totalMatrix.getTranslateX(), + -1 + totalMatrix.getTranslateY()); + shader2Local.postConcat(invTotal); + + LocalMatrixShaderBlock::LMShaderData lmShaderData(shader2Local); + + KeyContextWithLocalMatrix newContext(keyContext, shader2Local); + + LocalMatrixShaderBlock::BeginBlock(newContext, builder, gatherer, &lmShaderData); + PerlinNoiseShaderBlock::BeginBlock(newContext, builder, gatherer, &data); + builder->endBlock(); + builder->endBlock(); +} +#endif // SK_GRAPHITE + +/////////////////////////////////////////////////////////////////////////////////////////////////// + +static bool valid_input(SkScalar baseX, SkScalar baseY, int numOctaves, const SkISize* tileSize, + SkScalar seed) { + if (!(baseX >= 0 && baseY >= 0)) { + return false; + } + if (!(numOctaves >= 0 && numOctaves <= SkPerlinNoiseShaderImpl::kMaxOctaves)) { + return false; + } + if (tileSize && !(tileSize->width() >= 0 && tileSize->height() >= 0)) { + return false; + } + if (!SkScalarIsFinite(seed)) { + return false; + } + return true; +} + +sk_sp SkPerlinNoiseShader::MakeFractalNoise(SkScalar baseFrequencyX, + SkScalar baseFrequencyY, + int numOctaves, SkScalar seed, + const SkISize* tileSize) { + if (!valid_input(baseFrequencyX, baseFrequencyY, numOctaves, tileSize, seed)) { + return nullptr; + } + + if (0 == numOctaves) { + // For kFractalNoise, w/o any octaves, the entire shader collapses to: + // [0,0,0,0] * 0.5 + 0.5 + constexpr SkColor4f kTransparentGray = {0.5f, 0.5f, 0.5f, 0.5f}; + + return SkShaders::Color(kTransparentGray, /* colorSpace= */ nullptr); + } + + return sk_sp(new SkPerlinNoiseShaderImpl(SkPerlinNoiseShaderImpl::kFractalNoise_Type, + baseFrequencyX, baseFrequencyY, numOctaves, + seed, tileSize)); +} + +sk_sp SkPerlinNoiseShader::MakeTurbulence(SkScalar baseFrequencyX, + SkScalar baseFrequencyY, + int numOctaves, SkScalar seed, + const SkISize* tileSize) { + if (!valid_input(baseFrequencyX, baseFrequencyY, numOctaves, tileSize, seed)) { + return nullptr; + } + + if (0 == numOctaves) { + // For kTurbulence, w/o any octaves, the entire shader collapses to: [0,0,0,0] + return SkShaders::Color(SkColors::kTransparent, /* colorSpace= */ nullptr); + } + + return sk_sp(new SkPerlinNoiseShaderImpl(SkPerlinNoiseShaderImpl::kTurbulence_Type, + baseFrequencyX, baseFrequencyY, numOctaves, + seed, tileSize)); +} + +void SkPerlinNoiseShader::RegisterFlattenables() { + SK_REGISTER_FLATTENABLE(SkPerlinNoiseShaderImpl); +} diff --git a/gfx/skia/skia/src/shaders/SkPictureShader.cpp b/gfx/skia/skia/src/shaders/SkPictureShader.cpp new file mode 100644 index 0000000000..b65b1bca56 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkPictureShader.cpp @@ -0,0 +1,501 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/shaders/SkPictureShader.h" + +#include "include/core/SkBitmap.h" +#include "include/core/SkCanvas.h" +#include "include/core/SkImage.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkImageInfoPriv.h" +#include "src/core/SkImagePriv.h" +#include "src/core/SkMatrixPriv.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkMatrixUtils.h" +#include "src/core/SkPicturePriv.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkResourceCache.h" +#include "src/core/SkVM.h" +#include "src/shaders/SkBitmapProcShader.h" +#include "src/shaders/SkImageShader.h" +#include "src/shaders/SkLocalMatrixShader.h" + +#if defined(SK_GANESH) +#include "include/gpu/GrDirectContext.h" +#include "include/gpu/GrRecordingContext.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrColorInfo.h" +#include "src/gpu/ganesh/GrFPArgs.h" +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/SkGr.h" +#include "src/gpu/ganesh/effects/GrTextureEffect.h" +#include "src/image/SkImage_Base.h" +#include "src/shaders/SkLocalMatrixShader.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/Caps.h" +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#include "src/gpu/graphite/RecorderPriv.h" +#endif + +sk_sp SkPicture::makeShader(SkTileMode tmx, SkTileMode tmy, SkFilterMode filter, + const SkMatrix* localMatrix, const SkRect* tile) const { + if (localMatrix && !localMatrix->invert(nullptr)) { + return nullptr; + } + return SkPictureShader::Make(sk_ref_sp(this), tmx, tmy, filter, localMatrix, tile); +} + +namespace { +static unsigned gImageFromPictureKeyNamespaceLabel; + +struct ImageFromPictureKey : public SkResourceCache::Key { +public: + ImageFromPictureKey(SkColorSpace* colorSpace, SkColorType colorType, + uint32_t pictureID, const SkRect& subset, + SkSize scale, const SkSurfaceProps& surfaceProps) + : fColorSpaceXYZHash(colorSpace->toXYZD50Hash()) + , fColorSpaceTransferFnHash(colorSpace->transferFnHash()) + , fColorType(static_cast(colorType)) + , fSubset(subset) + , fScale(scale) + , fSurfaceProps(surfaceProps) + { + static const size_t keySize = sizeof(fColorSpaceXYZHash) + + sizeof(fColorSpaceTransferFnHash) + + sizeof(fColorType) + + sizeof(fSubset) + + sizeof(fScale) + + sizeof(fSurfaceProps); + // This better be packed. + SkASSERT(sizeof(uint32_t) * (&fEndOfStruct - &fColorSpaceXYZHash) == keySize); + this->init(&gImageFromPictureKeyNamespaceLabel, + SkPicturePriv::MakeSharedID(pictureID), + keySize); + } + +private: + uint32_t fColorSpaceXYZHash; + uint32_t fColorSpaceTransferFnHash; + uint32_t fColorType; + SkRect fSubset; + SkSize fScale; + SkSurfaceProps fSurfaceProps; + + SkDEBUGCODE(uint32_t fEndOfStruct;) +}; + +struct ImageFromPictureRec : public SkResourceCache::Rec { + ImageFromPictureRec(const ImageFromPictureKey& key, sk_sp image) + : fKey(key) + , fImage(std::move(image)) {} + + ImageFromPictureKey fKey; + sk_sp fImage; + + const Key& getKey() const override { return fKey; } + size_t bytesUsed() const override { + // Just the record overhead -- the actual pixels are accounted by SkImage_Lazy. + return sizeof(fKey) + (size_t)fImage->width() * fImage->height() * 4; + } + const char* getCategory() const override { return "bitmap-shader"; } + SkDiscardableMemory* diagnostic_only_getDiscardable() const override { return nullptr; } + + static bool Visitor(const SkResourceCache::Rec& baseRec, void* contextShader) { + const ImageFromPictureRec& rec = static_cast(baseRec); + sk_sp* result = reinterpret_cast*>(contextShader); + + *result = rec.fImage; + return true; + } +}; + +} // namespace + +SkPictureShader::SkPictureShader(sk_sp picture, + SkTileMode tmx, + SkTileMode tmy, + SkFilterMode filter, + const SkRect* tile) + : fPicture(std::move(picture)) + , fTile(tile ? *tile : fPicture->cullRect()) + , fTmx(tmx) + , fTmy(tmy) + , fFilter(filter) {} + +sk_sp SkPictureShader::Make(sk_sp picture, SkTileMode tmx, SkTileMode tmy, + SkFilterMode filter, const SkMatrix* lm, const SkRect* tile) { + if (!picture || picture->cullRect().isEmpty() || (tile && tile->isEmpty())) { + return SkShaders::Empty(); + } + return SkLocalMatrixShader::MakeWrapped(lm, + std::move(picture), + tmx, tmy, + filter, + tile); +} + +sk_sp SkPictureShader::CreateProc(SkReadBuffer& buffer) { + SkMatrix lm; + if (buffer.isVersionLT(SkPicturePriv::Version::kNoShaderLocalMatrix)) { + buffer.readMatrix(&lm); + } + auto tmx = buffer.read32LE(SkTileMode::kLastTileMode); + auto tmy = buffer.read32LE(SkTileMode::kLastTileMode); + SkRect tile = buffer.readRect(); + + sk_sp picture; + + SkFilterMode filter = SkFilterMode::kNearest; + if (buffer.isVersionLT(SkPicturePriv::kNoFilterQualityShaders_Version)) { + if (buffer.isVersionLT(SkPicturePriv::kPictureShaderFilterParam_Version)) { + bool didSerialize = buffer.readBool(); + if (didSerialize) { + picture = SkPicturePriv::MakeFromBuffer(buffer); + } + } else { + unsigned legacyFilter = buffer.read32(); + if (legacyFilter <= (unsigned)SkFilterMode::kLast) { + filter = (SkFilterMode)legacyFilter; + } + picture = SkPicturePriv::MakeFromBuffer(buffer); + } + } else { + filter = buffer.read32LE(SkFilterMode::kLast); + picture = SkPicturePriv::MakeFromBuffer(buffer); + } + return SkPictureShader::Make(picture, tmx, tmy, filter, &lm, &tile); +} + +void SkPictureShader::flatten(SkWriteBuffer& buffer) const { + buffer.write32((unsigned)fTmx); + buffer.write32((unsigned)fTmy); + buffer.writeRect(fTile); + buffer.write32((unsigned)fFilter); + SkPicturePriv::Flatten(fPicture, buffer); +} + +static sk_sp ref_or_srgb(SkColorSpace* cs) { + return cs ? sk_ref_sp(cs) : SkColorSpace::MakeSRGB(); +} + +struct CachedImageInfo { + bool success; + SkSize tileScale; // Additional scale factors to apply when sampling image. + SkMatrix matrixForDraw; // Matrix used to produce an image from the picture + SkImageInfo imageInfo; + SkSurfaceProps props; + + static CachedImageInfo Make(const SkRect& bounds, + const SkMatrix& totalM, + SkColorType dstColorType, + SkColorSpace* dstColorSpace, + const int maxTextureSize, + const SkSurfaceProps& propsIn) { + SkSurfaceProps props = propsIn.cloneWithPixelGeometry(kUnknown_SkPixelGeometry); + + const SkSize scaledSize = [&]() { + SkSize size; + // Use a rotation-invariant scale + if (!totalM.decomposeScale(&size, nullptr)) { + SkPoint center = {bounds.centerX(), bounds.centerY()}; + SkScalar area = SkMatrixPriv::DifferentialAreaScale(totalM, center); + if (!SkScalarIsFinite(area) || SkScalarNearlyZero(area)) { + size = {1, 1}; // ill-conditioned matrix + } else { + size.fWidth = size.fHeight = SkScalarSqrt(area); + } + } + size.fWidth *= bounds.width(); + size.fHeight *= bounds.height(); + + // Clamp the tile size to about 4M pixels + static const SkScalar kMaxTileArea = 2048 * 2048; + SkScalar tileArea = size.width() * size.height(); + if (tileArea > kMaxTileArea) { + SkScalar clampScale = SkScalarSqrt(kMaxTileArea / tileArea); + size.set(size.width() * clampScale, size.height() * clampScale); + } + + // Scale down the tile size if larger than maxTextureSize for GPU path + // or it should fail on create texture + if (maxTextureSize) { + if (size.width() > maxTextureSize || size.height() > maxTextureSize) { + SkScalar downScale = maxTextureSize / std::max(size.width(), + size.height()); + size.set(SkScalarFloorToScalar(size.width() * downScale), + SkScalarFloorToScalar(size.height() * downScale)); + } + } + return size; + }(); + + const SkISize tileSize = scaledSize.toCeil(); + if (tileSize.isEmpty()) { + return {false, {}, {}, {}, {}}; + } + + const SkSize tileScale = { + tileSize.width() / bounds.width(), tileSize.height() / bounds.height() + }; + auto imgCS = ref_or_srgb(dstColorSpace); + const SkColorType imgCT = SkColorTypeMaxBitsPerChannel(dstColorType) <= 8 + ? kRGBA_8888_SkColorType + : kRGBA_F16Norm_SkColorType; + + return {true, + tileScale, + SkMatrix::RectToRect(bounds, SkRect::MakeIWH(tileSize.width(), tileSize.height())), + SkImageInfo::Make(tileSize, imgCT, kPremul_SkAlphaType, imgCS), + props}; + } + + sk_sp makeImage(sk_sp surf, const SkPicture* pict) const { + if (!surf) { + return nullptr; + } + auto canvas = surf->getCanvas(); + canvas->concat(matrixForDraw); + canvas->drawPicture(pict); + return surf->makeImageSnapshot(); + } +}; + +// Returns a cached image shader, which wraps a single picture tile at the given +// CTM/local matrix. Also adjusts the local matrix for tile scaling. +sk_sp SkPictureShader::rasterShader(const SkMatrix& totalM, + SkColorType dstColorType, + SkColorSpace* dstColorSpace, + const SkSurfaceProps& propsIn) const { + const int maxTextureSize_NotUsedForCPU = 0; + CachedImageInfo info = CachedImageInfo::Make(fTile, + totalM, + dstColorType, dstColorSpace, + maxTextureSize_NotUsedForCPU, + propsIn); + if (!info.success) { + return nullptr; + } + + ImageFromPictureKey key(info.imageInfo.colorSpace(), info.imageInfo.colorType(), + fPicture->uniqueID(), fTile, info.tileScale, info.props); + + sk_sp image; + if (!SkResourceCache::Find(key, ImageFromPictureRec::Visitor, &image)) { + image = info.makeImage(SkSurface::MakeRaster(info.imageInfo, &info.props), fPicture.get()); + if (!image) { + return nullptr; + } + + SkResourceCache::Add(new ImageFromPictureRec(key, image)); + SkPicturePriv::AddedToCache(fPicture.get()); + } + // Scale the image to the original picture size. + auto lm = SkMatrix::Scale(1.f/info.tileScale.width(), 1.f/info.tileScale.height()); + return image->makeShader(fTmx, fTmy, SkSamplingOptions(fFilter), &lm); +} + +bool SkPictureShader::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + // Keep bitmapShader alive by using alloc instead of stack memory + auto& bitmapShader = *rec.fAlloc->make>(); + // We don't check whether the total local matrix is valid here because we have to assume *some* + // mapping to make an image. It could be wildly wrong if there is a runtime shader transforming + // the coordinates in a manner we don't know about here. However, that is a fundamental problem + // with the technique of converting a picture to an image to implement this shader. + bitmapShader = this->rasterShader(mRec.totalMatrix(), + rec.fDstColorType, + rec.fDstCS, + rec.fSurfaceProps); + if (!bitmapShader) { + return false; + } + return as_SB(bitmapShader)->appendStages(rec, mRec); +} + +skvm::Color SkPictureShader::program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + // TODO: We'll need additional plumbing to get the correct props from our callers. + SkSurfaceProps props{}; + + // Keep bitmapShader alive by using alloc instead of stack memory + auto& bitmapShader = *alloc->make>(); + bitmapShader = this->rasterShader(mRec.totalMatrix(), dst.colorType(), dst.colorSpace(), props); + if (!bitmapShader) { + return {}; + } + + return as_SB(bitmapShader)->program(p, device, local, paint, mRec, dst, uniforms, alloc); +} + +///////////////////////////////////////////////////////////////////////////////////////// + +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT +SkShaderBase::Context* SkPictureShader::onMakeContext(const ContextRec& rec, SkArenaAlloc* alloc) +const { + const auto& vm = *rec.fMatrix; + const auto* lm = rec.fLocalMatrix; + const auto totalM = lm ? SkMatrix::Concat(vm, *lm) : vm; + sk_sp bitmapShader = this->rasterShader(totalM, rec.fDstColorType, + rec.fDstColorSpace, rec.fProps); + if (!bitmapShader) { + return nullptr; + } + + return as_SB(bitmapShader)->makeContext(rec, alloc); +} +#endif + +///////////////////////////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +#include "src/gpu/ganesh/GrProxyProvider.h" + +std::unique_ptr SkPictureShader::asFragmentProcessor( + const GrFPArgs& args, const MatrixRec& mRec) const { + auto ctx = args.fContext; + SkColorType dstColorType = GrColorTypeToSkColorType(args.fDstColorInfo->colorType()); + if (dstColorType == kUnknown_SkColorType) { + dstColorType = kRGBA_8888_SkColorType; + } + + auto dstCS = ref_or_srgb(args.fDstColorInfo->colorSpace()); + + auto info = CachedImageInfo::Make(fTile, + mRec.totalMatrix(), + dstColorType, + dstCS.get(), + ctx->priv().caps()->maxTextureSize(), + args.fSurfaceProps); + if (!info.success) { + return nullptr; + } + + // Gotta be sure the GPU can support our requested colortype (might be FP16) + if (!ctx->colorTypeSupportedAsSurface(info.imageInfo.colorType())) { + info.imageInfo = info.imageInfo.makeColorType(kRGBA_8888_SkColorType); + } + + static const skgpu::UniqueKey::Domain kDomain = skgpu::UniqueKey::GenerateDomain(); + skgpu::UniqueKey key; + std::tuple keyData = { + dstCS->toXYZD50Hash(), + dstCS->transferFnHash(), + static_cast(dstColorType), + fPicture->uniqueID(), + fTile, + info.tileScale, + info.props + }; + skgpu::UniqueKey::Builder builder(&key, kDomain, sizeof(keyData)/sizeof(uint32_t), + "Picture Shader Image"); + memcpy(&builder[0], &keyData, sizeof(keyData)); + builder.finish(); + + GrProxyProvider* provider = ctx->priv().proxyProvider(); + GrSurfaceProxyView view; + if (auto proxy = provider->findOrCreateProxyByUniqueKey(key)) { + view = GrSurfaceProxyView(proxy, kTopLeft_GrSurfaceOrigin, skgpu::Swizzle()); + } else { + const int msaaSampleCount = 0; + const bool createWithMips = false; + auto image = info.makeImage(SkSurface::MakeRenderTarget(ctx, + skgpu::Budgeted::kYes, + info.imageInfo, + msaaSampleCount, + kTopLeft_GrSurfaceOrigin, + &info.props, + createWithMips), + fPicture.get()); + if (!image) { + return nullptr; + } + auto [v, ct] = as_IB(image)->asView(ctx, GrMipmapped::kNo); + view = std::move(v); + provider->assignUniqueKeyToProxy(key, view.asTextureProxy()); + } + + const GrSamplerState sampler(static_cast(fTmx), + static_cast(fTmy), + fFilter); + auto fp = GrTextureEffect::Make(std::move(view), + kPremul_SkAlphaType, + SkMatrix::I(), + sampler, + *ctx->priv().caps()); + SkMatrix scale = SkMatrix::Scale(info.tileScale.width(), info.tileScale.height()); + bool success; + std::tie(success, fp) = mRec.apply(std::move(fp), scale); + return success ? std::move(fp) : nullptr; +} +#endif + +#if defined(SK_GRAPHITE) +void SkPictureShader::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + + using namespace skgpu::graphite; + + Recorder* recorder = keyContext.recorder(); + const Caps* caps = recorder->priv().caps(); + + // TODO: We'll need additional plumbing to get the correct props from our callers. In + // particular we'll need to expand the keyContext to have the surfaceProps, the dstColorType + // and dstColorSpace. + SkSurfaceProps props{}; + + SkMatrix totalM = keyContext.local2Dev().asM33(); + if (keyContext.localMatrix()) { + totalM.preConcat(*keyContext.localMatrix()); + } + CachedImageInfo info = CachedImageInfo::Make(fTile, + totalM, + /* dstColorType= */ kRGBA_8888_SkColorType, + /* dstColorSpace= */ nullptr, + caps->maxTextureSize(), + props); + if (!info.success) { + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, {1, 0, 0, 1}); + builder->endBlock(); + return; + } + + // TODO: right now we're explicitly not caching here. We could expand the ImageProvider + // API to include already Graphite-backed images, add a Recorder-local cache or add + // rendered-picture images to the global cache. + sk_sp img = info.makeImage(SkSurface::MakeGraphite(recorder, info.imageInfo, + skgpu::Mipmapped::kNo, &info.props), + fPicture.get()); + if (!img) { + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, {1, 0, 0, 1}); + builder->endBlock(); + return; + } + + const auto shaderLM = SkMatrix::Scale(1.f/info.tileScale.width(), 1.f/info.tileScale.height()); + sk_sp shader = img->makeShader(fTmx, fTmy, SkSamplingOptions(fFilter), &shaderLM); + if (!shader) { + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, {1, 0, 0, 1}); + builder->endBlock(); + return; + } + + as_SB(shader)->addToKey(keyContext, builder, gatherer); +} +#endif // SK_GRAPHITE diff --git a/gfx/skia/skia/src/shaders/SkPictureShader.h b/gfx/skia/skia/src/shaders/SkPictureShader.h new file mode 100644 index 0000000000..3f2942bc9a --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkPictureShader.h @@ -0,0 +1,75 @@ +/* + * Copyright 2014 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkPictureShader_DEFINED +#define SkPictureShader_DEFINED + +#include "include/core/SkTileMode.h" +#include "src/shaders/SkShaderBase.h" +#include + +class SkArenaAlloc; +class SkBitmap; +class SkPicture; + +/* + * An SkPictureShader can be used to draw SkPicture-based patterns. + * + * The SkPicture is first rendered into a tile, which is then used to shade the area according + * to specified tiling rules. + */ +class SkPictureShader : public SkShaderBase { +public: + static sk_sp Make(sk_sp, SkTileMode, SkTileMode, SkFilterMode, + const SkMatrix*, const SkRect*); + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + + SkPictureShader(sk_sp, SkTileMode, SkTileMode, SkFilterMode, const SkRect*); + +protected: + SkPictureShader(SkReadBuffer&); + void flatten(SkWriteBuffer&) const override; + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override; + +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT + Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override; +#endif + +private: + SK_FLATTENABLE_HOOKS(SkPictureShader) + + sk_sp rasterShader(const SkMatrix&, + SkColorType dstColorType, + SkColorSpace* dstColorSpace, + const SkSurfaceProps& props) const; + + sk_sp fPicture; + SkRect fTile; + SkTileMode fTmx, fTmy; + SkFilterMode fFilter; + + using INHERITED = SkShaderBase; +}; + +#endif // SkPictureShader_DEFINED diff --git a/gfx/skia/skia/src/shaders/SkShader.cpp b/gfx/skia/skia/src/shaders/SkShader.cpp new file mode 100644 index 0000000000..83eee34278 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkShader.cpp @@ -0,0 +1,334 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkMallocPixelRef.h" +#include "include/core/SkPaint.h" +#include "include/core/SkScalar.h" +#include "src/base/SkArenaAlloc.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkBitmapProcShader.h" +#include "src/shaders/SkImageShader.h" +#include "src/shaders/SkShaderBase.h" +#include "src/shaders/SkTransformShader.h" + +#if defined(SK_GANESH) +#include "src/gpu/ganesh/GrFragmentProcessor.h" +#include "src/gpu/ganesh/effects/GrMatrixEffect.h" +#endif + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +SkShaderBase::SkShaderBase() = default; + +SkShaderBase::~SkShaderBase() = default; + +SkShaderBase::MatrixRec::MatrixRec(const SkMatrix& ctm) : fCTM(ctm) {} + +std::optional +SkShaderBase::MatrixRec::apply(const SkStageRec& rec, const SkMatrix& postInv) const { + SkMatrix total = fPendingLocalMatrix; + if (!fCTMApplied) { + total = SkMatrix::Concat(fCTM, total); + } + if (!total.invert(&total)) { + return {}; + } + total = SkMatrix::Concat(postInv, total); + if (!fCTMApplied) { + rec.fPipeline->append(SkRasterPipelineOp::seed_shader); + } + // append_matrix is a no-op if total worked out to identity. + rec.fPipeline->append_matrix(rec.fAlloc, total); + return MatrixRec{fCTM, + fTotalLocalMatrix, + /*pendingLocalMatrix=*/SkMatrix::I(), + fTotalMatrixIsValid, + /*ctmApplied=*/true}; +} + +std::optional +SkShaderBase::MatrixRec::apply(skvm::Builder* p, + skvm::Coord* local, + skvm::Uniforms* uniforms, + const SkMatrix& postInv) const { + SkMatrix total = fPendingLocalMatrix; + if (!fCTMApplied) { + total = SkMatrix::Concat(fCTM, total); + } + if (!total.invert(&total)) { + return {}; + } + total = SkMatrix::Concat(postInv, total); + // ApplyMatrix is a no-op if total worked out to identity. + *local = SkShaderBase::ApplyMatrix(p, total, *local, uniforms); + return MatrixRec{fCTM, + fTotalLocalMatrix, + /*pendingLocalMatrix=*/SkMatrix::I(), + fTotalMatrixIsValid, + /*ctmApplied=*/true}; +} + +#if defined(SK_GANESH) +GrFPResult SkShaderBase::MatrixRec::apply(std::unique_ptr fp, + const SkMatrix& postInv) const { + // FP matrices work differently than SkRasterPipeline and SkVM. The starting coordinates + // provided to the root SkShader's FP are already in local space. So we never apply the inverse + // CTM. + SkASSERT(!fCTMApplied); + SkMatrix total; + if (!fPendingLocalMatrix.invert(&total)) { + return {false, std::move(fp)}; + } + total = SkMatrix::Concat(postInv, total); + // GrMatrixEffect returns 'fp' if total worked out to identity. + return {true, GrMatrixEffect::Make(total, std::move(fp))}; +} + +SkShaderBase::MatrixRec SkShaderBase::MatrixRec::applied() const { + // We mark the CTM as "not applied" because we *never* apply the CTM for FPs. Their starting + // coords are local, not device, coords. + return MatrixRec{fCTM, + fTotalLocalMatrix, + /*pendingLocalMatrix=*/SkMatrix::I(), + fTotalMatrixIsValid, + /*ctmApplied=*/false}; +} +#endif + +SkShaderBase::MatrixRec SkShaderBase::MatrixRec::concat(const SkMatrix& m) const { + return {fCTM, + SkShaderBase::ConcatLocalMatrices(fTotalLocalMatrix, m), + SkShaderBase::ConcatLocalMatrices(fPendingLocalMatrix, m), + fTotalMatrixIsValid, + fCTMApplied}; +} + +void SkShaderBase::flatten(SkWriteBuffer& buffer) const { this->INHERITED::flatten(buffer); } + +bool SkShaderBase::computeTotalInverse(const SkMatrix& ctm, + const SkMatrix* localMatrix, + SkMatrix* totalInverse) const { + return (localMatrix ? SkMatrix::Concat(ctm, *localMatrix) : ctm).invert(totalInverse); +} + +bool SkShaderBase::asLuminanceColor(SkColor* colorPtr) const { + SkColor storage; + if (nullptr == colorPtr) { + colorPtr = &storage; + } + if (this->onAsLuminanceColor(colorPtr)) { + *colorPtr = SkColorSetA(*colorPtr, 0xFF); // we only return opaque + return true; + } + return false; +} + +SkShaderBase::Context* SkShaderBase::makeContext(const ContextRec& rec, SkArenaAlloc* alloc) const { +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT + // We always fall back to raster pipeline when perspective is present. + if (rec.fMatrix->hasPerspective() || (rec.fLocalMatrix && rec.fLocalMatrix->hasPerspective()) || + !this->computeTotalInverse(*rec.fMatrix, rec.fLocalMatrix, nullptr)) { + return nullptr; + } + + return this->onMakeContext(rec, alloc); +#else + return nullptr; +#endif +} + +SkShaderBase::Context::Context(const SkShaderBase& shader, const ContextRec& rec) + : fShader(shader), fCTM(*rec.fMatrix) +{ + // We should never use a context with perspective. + SkASSERT(!rec.fMatrix->hasPerspective()); + SkASSERT(!rec.fLocalMatrix || !rec.fLocalMatrix->hasPerspective()); + + // Because the context parameters must be valid at this point, we know that the matrix is + // invertible. + SkAssertResult(fShader.computeTotalInverse(*rec.fMatrix, rec.fLocalMatrix, &fTotalInverse)); + + fPaintAlpha = rec.fPaintAlpha; +} + +SkShaderBase::Context::~Context() {} + +bool SkShaderBase::ContextRec::isLegacyCompatible(SkColorSpace* shaderColorSpace) const { + // In legacy pipelines, shaders always produce premul (or opaque) and the destination is also + // always premul (or opaque). (And those "or opaque" caveats won't make any difference here.) + SkAlphaType shaderAT = kPremul_SkAlphaType, + dstAT = kPremul_SkAlphaType; + return 0 == SkColorSpaceXformSteps{shaderColorSpace, shaderAT, + fDstColorSpace, dstAT}.flags.mask(); +} + +SkImage* SkShader::isAImage(SkMatrix* localMatrix, SkTileMode xy[2]) const { + return as_SB(this)->onIsAImage(localMatrix, xy); +} + +#if defined(SK_GANESH) +std::unique_ptr +SkShaderBase::asRootFragmentProcessor(const GrFPArgs& args, const SkMatrix& ctm) const { + return this->asFragmentProcessor(args, MatrixRec(ctm)); +} + +std::unique_ptr SkShaderBase::asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const { + return nullptr; +} +#endif + +sk_sp SkShaderBase::makeAsALocalMatrixShader(SkMatrix*) const { + return nullptr; +} + +#if defined(SK_GRAPHITE) +// TODO: add implementations for derived classes +void SkShaderBase::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SolidColorShaderBlock::BeginBlock(keyContext, builder, gatherer, {1, 0, 0, 1}); + builder->endBlock(); +} +#endif + +bool SkShaderBase::appendRootStages(const SkStageRec& rec, const SkMatrix& ctm) const { + return this->appendStages(rec, MatrixRec(ctm)); +} + +bool SkShaderBase::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + // SkShader::Context::shadeSpan() handles the paint opacity internally, + // but SkRasterPipelineBlitter applies it as a separate stage. + // We skip the internal shadeSpan() step by forcing the paint opaque. + SkColor4f opaquePaintColor = rec.fPaintColor.makeOpaque(); + + // We don't have a separate ctm and local matrix at this point. Just pass the combined matrix + // as the CTM. TODO: thread the MatrixRec through the legacy context system. + auto tm = mRec.totalMatrix(); + ContextRec cr(opaquePaintColor, + tm, + nullptr, + rec.fDstColorType, + sk_srgb_singleton(), + rec.fSurfaceProps); + + struct CallbackCtx : SkRasterPipeline_CallbackCtx { + sk_sp shader; + Context* ctx; + }; + auto cb = rec.fAlloc->make(); + cb->shader = sk_ref_sp(this); + cb->ctx = as_SB(this)->makeContext(cr, rec.fAlloc); + cb->fn = [](SkRasterPipeline_CallbackCtx* self, int active_pixels) { + auto c = (CallbackCtx*)self; + int x = (int)c->rgba[0], + y = (int)c->rgba[1]; + SkPMColor tmp[SkRasterPipeline_kMaxStride_highp]; + c->ctx->shadeSpan(x,y, tmp, active_pixels); + + for (int i = 0; i < active_pixels; i++) { + auto rgba_4f = SkPMColor4f::FromPMColor(tmp[i]); + memcpy(c->rgba + 4*i, rgba_4f.vec(), 4*sizeof(float)); + } + }; + + if (cb->ctx) { + rec.fPipeline->append(SkRasterPipelineOp::seed_shader); + rec.fPipeline->append(SkRasterPipelineOp::callback, cb); + rec.fAlloc->make(sk_srgb_singleton(), kPremul_SkAlphaType, + rec.fDstCS, kPremul_SkAlphaType) + ->apply(rec.fPipeline); + return true; + } + return false; +} + +skvm::Color SkShaderBase::rootProgram(skvm::Builder* p, + skvm::Coord device, + skvm::Color paint, + const SkMatrix& ctm, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + // Shader subclasses should always act as if the destination were premul or opaque. + // SkVMBlitter handles all the coordination of unpremul itself, via premul. + SkColorInfo tweaked = dst.alphaType() == kUnpremul_SkAlphaType + ? dst.makeAlphaType(kPremul_SkAlphaType) + : dst; + + // Force opaque alpha for all opaque shaders. + // + // This is primarily nice in that we usually have a 1.0f constant splat + // somewhere in the program anyway, and this will let us drop the work the + // shader notionally does to produce alpha, p->extract(...), etc. in favor + // of that simple hoistable splat. + // + // More subtly, it makes isOpaque() a parameter to all shader program + // generation, guaranteeing that is-opaque bit is mixed into the overall + // shader program hash and blitter Key. This makes it safe for us to use + // that bit to make decisions when constructing an SkVMBlitter, like doing + // SrcOver -> Src strength reduction. + if (auto color = this->program(p, + device, + /*local=*/device, + paint, + MatrixRec(ctm), + tweaked, + uniforms, + alloc)) { + if (this->isOpaque()) { + color.a = p->splat(1.0f); + } + return color; + } + return {}; +} + +// need a cheap way to invert the alpha channel of a shader (i.e. 1 - a) +sk_sp SkShaderBase::makeInvertAlpha() const { + return this->makeWithColorFilter(SkColorFilters::Blend(0xFFFFFFFF, SkBlendMode::kSrcOut)); +} + + +skvm::Coord SkShaderBase::ApplyMatrix(skvm::Builder* p, const SkMatrix& m, + skvm::Coord coord, skvm::Uniforms* uniforms) { + skvm::F32 x = coord.x, + y = coord.y; + if (m.isIdentity()) { + // That was easy. + } else if (m.isTranslate()) { + x = p->add(x, p->uniformF(uniforms->pushF(m[2]))); + y = p->add(y, p->uniformF(uniforms->pushF(m[5]))); + } else if (m.isScaleTranslate()) { + x = p->mad(x, p->uniformF(uniforms->pushF(m[0])), p->uniformF(uniforms->pushF(m[2]))); + y = p->mad(y, p->uniformF(uniforms->pushF(m[4])), p->uniformF(uniforms->pushF(m[5]))); + } else { // Affine or perspective. + auto dot = [&,x,y](int row) { + return p->mad(x, p->uniformF(uniforms->pushF(m[3*row+0])), + p->mad(y, p->uniformF(uniforms->pushF(m[3*row+1])), + p->uniformF(uniforms->pushF(m[3*row+2])))); + }; + x = dot(0); + y = dot(1); + if (m.hasPerspective()) { + x = x * (1.0f / dot(2)); + y = y * (1.0f / dot(2)); + } + } + return {x,y}; +} diff --git a/gfx/skia/skia/src/shaders/SkShaderBase.h b/gfx/skia/skia/src/shaders/SkShaderBase.h new file mode 100644 index 0000000000..d6348c2859 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkShaderBase.h @@ -0,0 +1,494 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkShaderBase_DEFINED +#define SkShaderBase_DEFINED + +#include "include/core/SkColor.h" +#include "include/core/SkMatrix.h" +#include "include/core/SkPaint.h" +#include "include/core/SkSamplingOptions.h" +#include "include/core/SkShader.h" +#include "include/core/SkSurfaceProps.h" +#include "include/private/base/SkNoncopyable.h" +#include "src/base/SkTLazy.h" +#include "src/core/SkEffectPriv.h" +#include "src/core/SkMask.h" +#include "src/core/SkVM_fwd.h" + +#include + +class GrFragmentProcessor; +struct GrFPArgs; +class SkArenaAlloc; +class SkColorSpace; +class SkImage; +struct SkImageInfo; +class SkPaint; +class SkRasterPipeline; +class SkRuntimeEffect; +class SkStageUpdater; +class SkUpdatableShader; + +namespace skgpu::graphite { +class KeyContext; +class PaintParamsKeyBuilder; +class PipelineDataGatherer; +} + +#if defined(SK_GANESH) +using GrFPResult = std::tuple>; +#endif + +class SkShaderBase : public SkShader { +public: + ~SkShaderBase() override; + + sk_sp makeInvertAlpha() const; + sk_sp makeWithCTM(const SkMatrix&) const; // owns its own ctm + + /** + * Returns true if the shader is guaranteed to produce only a single color. + * Subclasses can override this to allow loop-hoisting optimization. + */ + virtual bool isConstant() const { return false; } + + enum class GradientType { + kNone, + kColor, + kLinear, + kRadial, + kSweep, + kConical + }; + + /** + * If the shader subclass can be represented as a gradient, asGradient + * returns the matching GradientType enum (or GradientType::kNone if it + * cannot). Also, if info is not null, asGradient populates info with + * the relevant (see below) parameters for the gradient. fColorCount + * is both an input and output parameter. On input, it indicates how + * many entries in fColors and fColorOffsets can be used, if they are + * non-NULL. After asGradient has run, fColorCount indicates how + * many color-offset pairs there are in the gradient. If there is + * insufficient space to store all of the color-offset pairs, fColors + * and fColorOffsets will not be altered. fColorOffsets specifies + * where on the range of 0 to 1 to transition to the given color. + * The meaning of fPoint and fRadius is dependent on the type of gradient. + * + * None: + * info is ignored. + * Color: + * fColorOffsets[0] is meaningless. + * Linear: + * fPoint[0] and fPoint[1] are the end-points of the gradient + * Radial: + * fPoint[0] and fRadius[0] are the center and radius + * Conical: + * fPoint[0] and fRadius[0] are the center and radius of the 1st circle + * fPoint[1] and fRadius[1] are the center and radius of the 2nd circle + * Sweep: + * fPoint[0] is the center of the sweep. + */ + struct GradientInfo { + int fColorCount = 0; //!< In-out parameter, specifies passed size + // of fColors/fColorOffsets on input, and + // actual number of colors/offsets on + // output. + SkColor* fColors = nullptr; //!< The colors in the gradient. + SkScalar* fColorOffsets = nullptr; //!< The unit offset for color transitions. + SkPoint fPoint[2]; //!< Type specific, see above. + SkScalar fRadius[2]; //!< Type specific, see above. + SkTileMode fTileMode; + uint32_t fGradientFlags = 0; //!< see SkGradientShader::Flags + }; + + virtual GradientType asGradient(GradientInfo* info = nullptr, + SkMatrix* localMatrix = nullptr) const { + return GradientType::kNone; + } + + enum Flags { + //!< set if all of the colors will be opaque + kOpaqueAlpha_Flag = 1 << 0, + + /** set if the spans only vary in X (const in Y). + e.g. an Nx1 bitmap that is being tiled in Y, or a linear-gradient + that varies from left-to-right. This flag specifies this for + shadeSpan(). + */ + kConstInY32_Flag = 1 << 1, + + /** hint for the blitter that 4f is the preferred shading mode. + */ + kPrefers4f_Flag = 1 << 2, + }; + + /** + * ContextRec acts as a parameter bundle for creating Contexts. + */ + struct ContextRec { + ContextRec(const SkColor4f& paintColor, const SkMatrix& matrix, const SkMatrix* localM, + SkColorType dstColorType, SkColorSpace* dstColorSpace, SkSurfaceProps props) + : fMatrix(&matrix) + , fLocalMatrix(localM) + , fDstColorType(dstColorType) + , fDstColorSpace(dstColorSpace) + , fProps(props) { + fPaintAlpha = SkColorGetA(paintColor.toSkColor()); + } + + const SkMatrix* fMatrix; // the current matrix in the canvas + const SkMatrix* fLocalMatrix; // optional local matrix + SkColorType fDstColorType; // the color type of the dest surface + SkColorSpace* fDstColorSpace; // the color space of the dest surface (if any) + SkSurfaceProps fProps; // props of the dest surface + SkAlpha fPaintAlpha; + + bool isLegacyCompatible(SkColorSpace* shadersColorSpace) const; + }; + + class Context : public ::SkNoncopyable { + public: + Context(const SkShaderBase& shader, const ContextRec&); + + virtual ~Context(); + + /** + * Called sometimes before drawing with this shader. Return the type of + * alpha your shader will return. The default implementation returns 0. + * Your subclass should override if it can (even sometimes) report a + * non-zero value, since that will enable various blitters to perform + * faster. + */ + virtual uint32_t getFlags() const { return 0; } + + /** + * Called for each span of the object being drawn. Your subclass should + * set the appropriate colors (with premultiplied alpha) that correspond + * to the specified device coordinates. + */ + virtual void shadeSpan(int x, int y, SkPMColor[], int count) = 0; + + protected: + // Reference to shader, so we don't have to dupe information. + const SkShaderBase& fShader; + + uint8_t getPaintAlpha() const { return fPaintAlpha; } + const SkMatrix& getTotalInverse() const { return fTotalInverse; } + const SkMatrix& getCTM() const { return fCTM; } + + private: + SkMatrix fCTM; + SkMatrix fTotalInverse; + uint8_t fPaintAlpha; + + using INHERITED = SkNoncopyable; + }; + + /** + * This is used to accumulate matrices, starting with the CTM, when building up + * SkRasterPipeline, SkVM, and GrFragmentProcessor by walking the SkShader tree. It avoids + * adding a matrix multiply for each individual matrix. It also handles the reverse matrix + * concatenation order required by Android Framework, see b/256873449. + * + * This also tracks the dubious concept of a "total matrix", which includes all the matrices + * encountered during traversal to the current shader, including ones that have already been + * applied. The total matrix represents the transformation from the current shader's coordinate + * space to device space. It is dubious because it doesn't account for SkShaders that manipulate + * the coordinates passed to their children, which may not even be representable by a matrix. + * + * The total matrix is used for mipmap level selection and a filter downgrade optimizations in + * SkImageShader and sizing of the SkImage created by SkPictureShader. If we can remove usages + * of the "total matrix" and if Android Framework could be updated to not use backwards local + * matrix concatenation this could just be replaced by a simple SkMatrix or SkM44 passed down + * during traversal. + */ + class MatrixRec { + public: + MatrixRec() = default; + + explicit MatrixRec(const SkMatrix& ctm); + + /** + * Returns a new MatrixRec that represents the existing total and pending matrix + * pre-concat'ed with m. + */ + MatrixRec SK_WARN_UNUSED_RESULT concat(const SkMatrix& m) const; + + /** + * Appends a mul by the inverse of the pending local matrix to the pipeline. 'postInv' is an + * additional matrix to post-apply to the inverted pending matrix. If the pending matrix is + * not invertible the std::optional result won't have a value and the pipeline will be + * unmodified. + */ + std::optional SK_WARN_UNUSED_RESULT apply(const SkStageRec& rec, + const SkMatrix& postInv = {}) const; + + /** + * Muls local by the inverse of the pending matrix. 'postInv' is an additional matrix to + * post-apply to the inverted pending matrix. If the pending matrix is not invertible the + * std::optional result won't have a value and the Builder will be unmodified. + */ + std::optional SK_WARN_UNUSED_RESULT apply(skvm::Builder*, + skvm::Coord* local, // inout + skvm::Uniforms*, + const SkMatrix& postInv = {}) const; + +#if defined(SK_GANESH) + /** + * Produces an FP that muls its input coords by the inverse of the pending matrix and then + * samples the passed FP with those coordinates. 'postInv' is an additional matrix to + * post-apply to the inverted pending matrix. If the pending matrix is not invertible the + * GrFPResult's bool will be false and the passed FP will be returned to the caller in the + * GrFPResult. + */ + GrFPResult SK_WARN_UNUSED_RESULT apply(std::unique_ptr, + const SkMatrix& postInv = {}) const; + /** + * A parent FP may need to create a FP for its child by calling + * SkShaderBase::asFragmentProcessor() and then pass the result to the apply() above. + * This comes up when the parent needs to ensure pending matrices are applied before the + * child because the parent is going to manipulate the coordinates *after* any pending + * matrix and pass the resulting coords to the child. This function gets a MatrixRec that + * reflects the state after this MatrixRec has bee applied but it does not apply it! + * Example: + * auto childFP = fChild->asFragmentProcessor(args, mrec.applied()); + * childFP = MakeAWrappingFPThatModifiesChildsCoords(std::move(childFP)); + * auto [success, parentFP] = mrec.apply(std::move(childFP)); + */ + MatrixRec applied() const; +#endif + + /** Call to indicate that the mapping from shader to device space is not known. */ + void markTotalMatrixInvalid() { fTotalMatrixIsValid = false; } + + /** Marks the CTM as already applied; can avoid re-seeding the shader unnecessarily. */ + void markCTMApplied() { fCTMApplied = true; } + + /** + * Indicates whether the total matrix of a MatrixRec passed to a SkShader actually + * represents the full transform between that shader's coordinate space and device space. + */ + bool totalMatrixIsValid() const { return fTotalMatrixIsValid; } + + /** + * Gets the total transform from the current shader's space to device space. This may or + * may not be valid. Shaders should avoid making decisions based on this matrix if + * totalMatrixIsValid() is false. + */ + SkMatrix totalMatrix() const { return SkMatrix::Concat(fCTM, fTotalLocalMatrix); } + + /** Gets the inverse of totalMatrix(), if invertible. */ + bool SK_WARN_UNUSED_RESULT totalInverse(SkMatrix* out) const { + return this->totalMatrix().invert(out); + } + + /** Is there a transform that has not yet been applied by a parent shader? */ + bool hasPendingMatrix() const { + return (!fCTMApplied && !fCTM.isIdentity()) || !fPendingLocalMatrix.isIdentity(); + } + + /** When generating raster pipeline, have the device coordinates been seeded? */ + bool rasterPipelineCoordsAreSeeded() const { return fCTMApplied; } + + private: + MatrixRec(const SkMatrix& ctm, + const SkMatrix& totalLocalMatrix, + const SkMatrix& pendingLocalMatrix, + bool totalIsValid, + bool ctmApplied) + : fCTM(ctm) + , fTotalLocalMatrix(totalLocalMatrix) + , fPendingLocalMatrix(pendingLocalMatrix) + , fTotalMatrixIsValid(totalIsValid) + , fCTMApplied(ctmApplied) {} + + const SkMatrix fCTM; + + // Concatenation of all local matrices, including those already applied. + const SkMatrix fTotalLocalMatrix; + + // The accumulated local matrices from walking down the shader hierarchy that have NOT yet + // been incorporated into the SkRasterPipeline. + const SkMatrix fPendingLocalMatrix; + + bool fTotalMatrixIsValid = true; + + // Tracks whether the CTM has already been applied (and in raster pipeline whether the + // device coords have been seeded.) + bool fCTMApplied = false; + }; + + /** + * Make a context using the memory provided by the arena. + * + * @return pointer to context or nullptr if can't be created + */ + Context* makeContext(const ContextRec&, SkArenaAlloc*) const; + +#if defined(SK_GANESH) + /** + * Call on the root SkShader to produce a GrFragmentProcessor. + * + * The returned GrFragmentProcessor expects an unpremultiplied input color and produces a + * premultiplied output. + */ + std::unique_ptr asRootFragmentProcessor(const GrFPArgs&, + const SkMatrix& ctm) const; + /** + * Virtualized implementation of above. Any pending matrix in the MatrixRec should be applied + * to the coords if the SkShader uses its coordinates. This can be done by calling + * MatrixRec::apply() to wrap a GrFragmentProcessor in a GrMatrixEffect. + */ + virtual std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const; +#endif + + /** + * If the shader can represent its "average" luminance in a single color, return true and + * if color is not NULL, return that color. If it cannot, return false and ignore the color + * parameter. + * + * Note: if this returns true, the returned color will always be opaque, as only the RGB + * components are used to compute luminance. + */ + bool asLuminanceColor(SkColor*) const; + + /** + * If this returns false, then we draw nothing (do not fall back to shader context). This should + * only be called on a root-level effect. It assumes that the initial device coordinates have + * not yet been seeded. + */ + SK_WARN_UNUSED_RESULT + bool appendRootStages(const SkStageRec& rec, const SkMatrix& ctm) const; + + /** + * Adds stages to implement this shader. To ensure that the correct input coords are present + * in r,g MatrixRec::apply() must be called (unless the shader doesn't require it's input + * coords). The default impl creates shadercontext and calls that (not very efficient). + */ + virtual bool appendStages(const SkStageRec&, const MatrixRec&) const; + + bool SK_WARN_UNUSED_RESULT computeTotalInverse(const SkMatrix& ctm, + const SkMatrix* localMatrix, + SkMatrix* totalInverse) const; + + virtual SkImage* onIsAImage(SkMatrix*, SkTileMode[2]) const { + return nullptr; + } + + virtual SkRuntimeEffect* asRuntimeEffect() const { return nullptr; } + + static Type GetFlattenableType() { return kSkShader_Type; } + Type getFlattenableType() const override { return GetFlattenableType(); } + + static sk_sp Deserialize(const void* data, size_t size, + const SkDeserialProcs* procs = nullptr) { + return sk_sp(static_cast( + SkFlattenable::Deserialize(GetFlattenableType(), data, size, procs).release())); + } + static void RegisterFlattenables(); + + /** DEPRECATED. skbug.com/8941 + * If this shader can be represented by another shader + a localMatrix, return that shader and + * the localMatrix. If not, return nullptr and ignore the localMatrix parameter. + */ + virtual sk_sp makeAsALocalMatrixShader(SkMatrix* localMatrix) const; + + /** + * Called at the root of a shader tree to build a VM that produces color. The device coords + * should be initialized to the centers of device space pixels being shaded and the inverse of + * ctm should be the transform of those coords to local space. + */ + SK_WARN_UNUSED_RESULT + skvm::Color rootProgram(skvm::Builder*, + skvm::Coord device, + skvm::Color paint, + const SkMatrix& ctm, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const; + + /** + * Virtualized implementation of above. A note on the local coords param: it must be transformed + * by the inverse of the "pending" matrix in MatrixRec to be put in the correct space for this + * shader. This is done by calling MatrixRec::apply(). + */ + virtual skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dst, + skvm::Uniforms*, + SkArenaAlloc*) const = 0; + +#if defined(SK_GRAPHITE) + /** + Add implementation details, for the specified backend, of this SkShader to the + provided key. + + @param keyContext backend context for key creation + @param builder builder for creating the key for this SkShader + @param gatherer if non-null, storage for this shader's data + */ + virtual void addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const; +#endif + + static SkMatrix ConcatLocalMatrices(const SkMatrix& parentLM, const SkMatrix& childLM) { +#if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) // b/256873449 + return SkMatrix::Concat(childLM, parentLM); +#endif + return SkMatrix::Concat(parentLM, childLM); + } + +protected: + SkShaderBase(); + + void flatten(SkWriteBuffer&) const override; + +#ifdef SK_ENABLE_LEGACY_SHADERCONTEXT + /** + * Specialize creating a SkShader context using the supplied allocator. + * @return pointer to context owned by the arena allocator. + */ + virtual Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const { + return nullptr; + } +#endif + + virtual bool onAsLuminanceColor(SkColor*) const { + return false; + } + +protected: + static skvm::Coord ApplyMatrix(skvm::Builder*, const SkMatrix&, skvm::Coord, skvm::Uniforms*); + + using INHERITED = SkShader; +}; +inline SkShaderBase* as_SB(SkShader* shader) { + return static_cast(shader); +} + +inline const SkShaderBase* as_SB(const SkShader* shader) { + return static_cast(shader); +} + +inline const SkShaderBase* as_SB(const sk_sp& shader) { + return static_cast(shader.get()); +} + +void SkRegisterColor4ShaderFlattenable(); +void SkRegisterColorShaderFlattenable(); +void SkRegisterComposeShaderFlattenable(); +void SkRegisterCoordClampShaderFlattenable(); +void SkRegisterEmptyShaderFlattenable(); + +#endif // SkShaderBase_DEFINED diff --git a/gfx/skia/skia/src/shaders/SkTransformShader.cpp b/gfx/skia/skia/src/shaders/SkTransformShader.cpp new file mode 100644 index 0000000000..080560a782 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkTransformShader.cpp @@ -0,0 +1,99 @@ +/* + * Copyright 2021 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterPipeline.h" +#include "src/shaders/SkTransformShader.h" + +SkTransformShader::SkTransformShader(const SkShaderBase& shader, bool allowPerspective) + : fShader{shader}, fAllowPerspective{allowPerspective} { + SkMatrix::I().get9(fMatrixStorage); +} + +skvm::Color SkTransformShader::program(skvm::Builder* b, + skvm::Coord device, + skvm::Coord local, + skvm::Color color, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + // We have to seed and apply any constant matrices before appending our matrix that may + // mutate. We could try to apply one matrix stage and then incorporate the parent matrix + // with the variable matrix in each call to update(). However, in practice our callers + // fold the CTM into the update() matrix and don't wrap the transform shader in local matrix + // shaders so the call to apply below should be no-op. If this assert fires it just indicates an + // optimization opportunity, not a correctness bug. + SkASSERT(!mRec.hasPendingMatrix()); + + std::optional childMRec = mRec.apply(b, &local, uniforms); + if (!childMRec.has_value()) { + return {}; + } + // The matrix we're about to insert gets updated between uses of the VM so our children can't + // know the total transform when they add their stages. We don't incorporate this shader's + // matrix into the MatrixRec at all. + childMRec->markTotalMatrixInvalid(); + + auto matrix = uniforms->pushPtr(&fMatrixStorage); + + skvm::F32 x = local.x, + y = local.y; + + auto dot = [&, x, y](int row) { + return b->mad(x, + b->arrayF(matrix, 3 * row + 0), + b->mad(y, b->arrayF(matrix, 3 * row + 1), b->arrayF(matrix, 3 * row + 2))); + }; + + x = dot(0); + y = dot(1); + if (fAllowPerspective) { + x = x * (1.0f / dot(2)); + y = y * (1.0f / dot(2)); + } + + skvm::Coord newLocal = {x, y}; + return fShader.program(b, device, newLocal, color, *childMRec, dst, uniforms, alloc); +} + +bool SkTransformShader::update(const SkMatrix& matrix) { + if (SkMatrix inv; matrix.invert(&inv)) { + if (!fAllowPerspective && inv.hasPerspective()) { + return false; + } + + inv.get9(fMatrixStorage); + return true; + } + return false; +} + +bool SkTransformShader::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + // We have to seed and apply any constant matrices before appending our matrix that may + // mutate. We could try to add one matrix stage and then incorporate the parent matrix + // with the variable matrix in each call to update(). However, in practice our callers + // fold the CTM into the update() matrix and don't wrap the transform shader in local matrix + // shaders so the call to apply below should just seed the coordinates. If this assert fires + // it just indicates an optimization opportunity, not a correctness bug. + SkASSERT(!mRec.hasPendingMatrix()); + std::optional childMRec = mRec.apply(rec); + if (!childMRec.has_value()) { + return false; + } + // The matrix we're about to insert gets updated between uses of the pipeline so our children + // can't know the total transform when they add their stages. We don't even incorporate this + // matrix into the MatrixRec at all. + childMRec->markTotalMatrixInvalid(); + + auto type = fAllowPerspective ? SkRasterPipelineOp::matrix_perspective + : SkRasterPipelineOp::matrix_2x3; + rec.fPipeline->append(type, fMatrixStorage); + + fShader.appendStages(rec, *childMRec); + return true; +} diff --git a/gfx/skia/skia/src/shaders/SkTransformShader.h b/gfx/skia/skia/src/shaders/SkTransformShader.h new file mode 100644 index 0000000000..f04d4baad6 --- /dev/null +++ b/gfx/skia/skia/src/shaders/SkTransformShader.h @@ -0,0 +1,59 @@ +/* + * Copyright 2021 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#ifndef SkTextCoordShader_DEFINED +#define SkTextCoordShader_DEFINED + +#include "src/core/SkVM.h" +#include "src/shaders/SkShaderBase.h" + +// SkTransformShader applies a matrix transform to the shader coordinates, like a local matrix +// shader. The difference with a typical local matrix shader is that this shader's matrix is +// not combined with the inverse CTM or other local matrices in order to facilitate modifying the +// matrix between uses of the SkVM or SkRasterPipeline. This supports drawVertices and drawAtlas, in +// which the mapping from each triangle (when explicit texture coords are used) or atlas quad to +// shader space is different. +class SkTransformShader : public SkShaderBase { +public: + explicit SkTransformShader(const SkShaderBase& shader, bool allowPerspective); + + // Adds instructions to use the mapping stored in the uniforms represented by fMatrix. After + // generating a new skvm::Coord, it passes the mapped coordinates to fShader's program + // along with the identity matrix. + skvm::Color program(skvm::Builder* b, + skvm::Coord device, + skvm::Coord local, + skvm::Color color, + const MatrixRec& mRec, + const SkColorInfo& dst, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override; + + // Adds a pipestage to multiply the incoming coords in 'r' and 'g' by the matrix. The child + // shader is called with no pending local matrix and the total transform as unknowable. + bool appendStages(const SkStageRec& rec, const MatrixRec&) const override; + + // Change the matrix used by the generated SkRasterpipeline or SkVM. + bool update(const SkMatrix& matrix); + + // These are never serialized/deserialized + Factory getFactory() const override { + SkDEBUGFAIL("SkTransformShader shouldn't be serialized."); + return {}; + } + const char* getTypeName() const override { + SkDEBUGFAIL("SkTransformShader shouldn't be serialized."); + return nullptr; + } + + bool isOpaque() const override { return fShader.isOpaque(); } + +private: + const SkShaderBase& fShader; + SkScalar fMatrixStorage[9]; // actual memory used by generated RP or VM + bool fAllowPerspective; +}; +#endif //SkTextCoordShader_DEFINED diff --git a/gfx/skia/skia/src/shaders/gradients/SkGradientShader.cpp b/gfx/skia/skia/src/shaders/gradients/SkGradientShader.cpp new file mode 100644 index 0000000000..7040d5de51 --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkGradientShader.cpp @@ -0,0 +1,7 @@ +/* + * Copyright 2006 The Android Open Source Project + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + diff --git a/gfx/skia/skia/src/shaders/gradients/SkGradientShaderBase.cpp b/gfx/skia/skia/src/shaders/gradients/SkGradientShaderBase.cpp new file mode 100644 index 0000000000..87b6d91bb1 --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkGradientShaderBase.cpp @@ -0,0 +1,1325 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/shaders/gradients/SkGradientShaderBase.h" + +#include "include/core/SkColorSpace.h" +#include "src/base/SkVx.h" +#include "src/core/SkColorSpacePriv.h" +#include "src/core/SkColorSpaceXformSteps.h" +#include "src/core/SkConvertPixels.h" +#include "src/core/SkMatrixProvider.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkVM.h" +#include "src/core/SkWriteBuffer.h" + +#if defined(SK_GRAPHITE) +#include "src/core/SkColorSpacePriv.h" +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +#include + +enum GradientSerializationFlags { + // Bits 29:31 used for various boolean flags + kHasPosition_GSF = 0x80000000, + kHasLegacyLocalMatrix_GSF = 0x40000000, + kHasColorSpace_GSF = 0x20000000, + + // Bits 12:28 unused + + // Bits 8:11 for fTileMode + kTileModeShift_GSF = 8, + kTileModeMask_GSF = 0xF, + + // Bits 4:7 for fInterpolation.fColorSpace + kInterpolationColorSpaceShift_GSF = 4, + kInterpolationColorSpaceMask_GSF = 0xF, + + // Bits 1:3 for fInterpolation.fHueMethod + kInterpolationHueMethodShift_GSF = 1, + kInterpolationHueMethodMask_GSF = 0x7, + + // Bit 0 for fInterpolation.fInPremul + kInterpolationInPremul_GSF = 0x1, +}; + +SkGradientShaderBase::Descriptor::Descriptor() { + sk_bzero(this, sizeof(*this)); + fTileMode = SkTileMode::kClamp; +} +SkGradientShaderBase::Descriptor::~Descriptor() = default; + +void SkGradientShaderBase::flatten(SkWriteBuffer& buffer) const { + uint32_t flags = 0; + if (fPositions) { + flags |= kHasPosition_GSF; + } + sk_sp colorSpaceData = fColorSpace ? fColorSpace->serialize() : nullptr; + if (colorSpaceData) { + flags |= kHasColorSpace_GSF; + } + if (fInterpolation.fInPremul == Interpolation::InPremul::kYes) { + flags |= kInterpolationInPremul_GSF; + } + SkASSERT(static_cast(fTileMode) <= kTileModeMask_GSF); + flags |= ((uint32_t)fTileMode << kTileModeShift_GSF); + SkASSERT(static_cast(fInterpolation.fColorSpace) <= kInterpolationColorSpaceMask_GSF); + flags |= ((uint32_t)fInterpolation.fColorSpace << kInterpolationColorSpaceShift_GSF); + SkASSERT(static_cast(fInterpolation.fHueMethod) <= kInterpolationHueMethodMask_GSF); + flags |= ((uint32_t)fInterpolation.fHueMethod << kInterpolationHueMethodShift_GSF); + + buffer.writeUInt(flags); + + // If we injected implicit first/last stops at construction time, omit those when serializing: + int colorCount = fColorCount; + const SkColor4f* colors = fColors; + const SkScalar* positions = fPositions; + if (fFirstStopIsImplicit) { + colorCount--; + colors++; + if (positions) { + positions++; + } + } + if (fLastStopIsImplicit) { + colorCount--; + } + + buffer.writeColor4fArray(colors, colorCount); + if (colorSpaceData) { + buffer.writeDataAsByteArray(colorSpaceData.get()); + } + if (positions) { + buffer.writeScalarArray(positions, colorCount); + } +} + +template +static bool validate_array(SkReadBuffer& buffer, size_t count, SkSTArray* array) { + if (!buffer.validateCanReadN(count)) { + return false; + } + + array->resize_back(count); + return true; +} + +bool SkGradientShaderBase::DescriptorScope::unflatten(SkReadBuffer& buffer, + SkMatrix* legacyLocalMatrix) { + // New gradient format. Includes floating point color, color space, densely packed flags + uint32_t flags = buffer.readUInt(); + + fTileMode = (SkTileMode)((flags >> kTileModeShift_GSF) & kTileModeMask_GSF); + + fInterpolation.fColorSpace = (Interpolation::ColorSpace)( + (flags >> kInterpolationColorSpaceShift_GSF) & kInterpolationColorSpaceMask_GSF); + fInterpolation.fHueMethod = (Interpolation::HueMethod)( + (flags >> kInterpolationHueMethodShift_GSF) & kInterpolationHueMethodMask_GSF); + fInterpolation.fInPremul = (flags & kInterpolationInPremul_GSF) ? Interpolation::InPremul::kYes + : Interpolation::InPremul::kNo; + + fColorCount = buffer.getArrayCount(); + + if (!(validate_array(buffer, fColorCount, &fColorStorage) && + buffer.readColor4fArray(fColorStorage.begin(), fColorCount))) { + return false; + } + fColors = fColorStorage.begin(); + + if (SkToBool(flags & kHasColorSpace_GSF)) { + sk_sp data = buffer.readByteArrayAsData(); + fColorSpace = data ? SkColorSpace::Deserialize(data->data(), data->size()) : nullptr; + } else { + fColorSpace = nullptr; + } + if (SkToBool(flags & kHasPosition_GSF)) { + if (!(validate_array(buffer, fColorCount, &fPositionStorage) && + buffer.readScalarArray(fPositionStorage.begin(), fColorCount))) { + return false; + } + fPositions = fPositionStorage.begin(); + } else { + fPositions = nullptr; + } + if (SkToBool(flags & kHasLegacyLocalMatrix_GSF)) { + SkASSERT(buffer.isVersionLT(SkPicturePriv::Version::kNoShaderLocalMatrix)); + buffer.readMatrix(legacyLocalMatrix); + } else { + *legacyLocalMatrix = SkMatrix::I(); + } + return buffer.isValid(); +} + +//////////////////////////////////////////////////////////////////////////////////////////// + +SkGradientShaderBase::SkGradientShaderBase(const Descriptor& desc, const SkMatrix& ptsToUnit) + : fPtsToUnit(ptsToUnit) + , fColorSpace(desc.fColorSpace ? desc.fColorSpace : SkColorSpace::MakeSRGB()) + , fFirstStopIsImplicit(false) + , fLastStopIsImplicit(false) + , fColorsAreOpaque(true) { + fPtsToUnit.getType(); // Precache so reads are threadsafe. + SkASSERT(desc.fColorCount > 1); + + fInterpolation = desc.fInterpolation; + + SkASSERT((unsigned)desc.fTileMode < kSkTileModeCount); + fTileMode = desc.fTileMode; + + /* Note: we let the caller skip the first and/or last position. + i.e. pos[0] = 0.3, pos[1] = 0.7 + In these cases, we insert entries to ensure that the final data + will be bracketed by [0, 1]. + i.e. our_pos[0] = 0, our_pos[1] = 0.3, our_pos[2] = 0.7, our_pos[3] = 1 + + Thus colorCount (the caller's value, and fColorCount (our value) may + differ by up to 2. In the above example: + colorCount = 2 + fColorCount = 4 + */ + fColorCount = desc.fColorCount; + // check if we need to add in start and/or end position/colors + if (desc.fPositions) { + fFirstStopIsImplicit = desc.fPositions[0] != 0; + fLastStopIsImplicit = desc.fPositions[desc.fColorCount - 1] != SK_Scalar1; + fColorCount += fFirstStopIsImplicit + fLastStopIsImplicit; + } + + size_t storageSize = + fColorCount * (sizeof(SkColor4f) + (desc.fPositions ? sizeof(SkScalar) : 0)); + fColors = reinterpret_cast(fStorage.reset(storageSize)); + fPositions = desc.fPositions ? reinterpret_cast(fColors + fColorCount) : nullptr; + + // Now copy over the colors, adding the duplicates at t=0 and t=1 as needed + SkColor4f* colors = fColors; + if (fFirstStopIsImplicit) { + *colors++ = desc.fColors[0]; + } + for (int i = 0; i < desc.fColorCount; ++i) { + colors[i] = desc.fColors[i]; + fColorsAreOpaque = fColorsAreOpaque && (desc.fColors[i].fA == 1); + } + if (fLastStopIsImplicit) { + colors += desc.fColorCount; + *colors = desc.fColors[desc.fColorCount - 1]; + } + + if (desc.fPositions) { + SkScalar prev = 0; + SkScalar* positions = fPositions; + *positions++ = prev; // force the first pos to 0 + + int startIndex = fFirstStopIsImplicit ? 0 : 1; + int count = desc.fColorCount + fLastStopIsImplicit; + + bool uniformStops = true; + const SkScalar uniformStep = desc.fPositions[startIndex] - prev; + for (int i = startIndex; i < count; i++) { + // Pin the last value to 1.0, and make sure pos is monotonic. + auto curr = (i == desc.fColorCount) ? 1 : SkTPin(desc.fPositions[i], prev, 1.0f); + uniformStops &= SkScalarNearlyEqual(uniformStep, curr - prev); + + *positions++ = prev = curr; + } + + // If the stops are uniform, treat them as implicit. + if (uniformStops) { + fPositions = nullptr; + } + } +} + +SkGradientShaderBase::~SkGradientShaderBase() {} + +static void add_stop_color(SkRasterPipeline_GradientCtx* ctx, size_t stop, + SkPMColor4f Fs, SkPMColor4f Bs) { + (ctx->fs[0])[stop] = Fs.fR; + (ctx->fs[1])[stop] = Fs.fG; + (ctx->fs[2])[stop] = Fs.fB; + (ctx->fs[3])[stop] = Fs.fA; + + (ctx->bs[0])[stop] = Bs.fR; + (ctx->bs[1])[stop] = Bs.fG; + (ctx->bs[2])[stop] = Bs.fB; + (ctx->bs[3])[stop] = Bs.fA; +} + +static void add_const_color(SkRasterPipeline_GradientCtx* ctx, size_t stop, SkPMColor4f color) { + add_stop_color(ctx, stop, { 0, 0, 0, 0 }, color); +} + +// Calculate a factor F and a bias B so that color = F*t + B when t is in range of +// the stop. Assume that the distance between stops is 1/gapCount. +static void init_stop_evenly(SkRasterPipeline_GradientCtx* ctx, float gapCount, size_t stop, + SkPMColor4f c_l, SkPMColor4f c_r) { + // Clankium's GCC 4.9 targeting ARMv7 is barfing when we use Sk4f math here, so go scalar... + SkPMColor4f Fs = { + (c_r.fR - c_l.fR) * gapCount, + (c_r.fG - c_l.fG) * gapCount, + (c_r.fB - c_l.fB) * gapCount, + (c_r.fA - c_l.fA) * gapCount, + }; + SkPMColor4f Bs = { + c_l.fR - Fs.fR*(stop/gapCount), + c_l.fG - Fs.fG*(stop/gapCount), + c_l.fB - Fs.fB*(stop/gapCount), + c_l.fA - Fs.fA*(stop/gapCount), + }; + add_stop_color(ctx, stop, Fs, Bs); +} + +// For each stop we calculate a bias B and a scale factor F, such that +// for any t between stops n and n+1, the color we want is B[n] + F[n]*t. +static void init_stop_pos(SkRasterPipeline_GradientCtx* ctx, size_t stop, float t_l, float t_r, + SkPMColor4f c_l, SkPMColor4f c_r) { + // See note about Clankium's old compiler in init_stop_evenly(). + SkPMColor4f Fs = { + (c_r.fR - c_l.fR) / (t_r - t_l), + (c_r.fG - c_l.fG) / (t_r - t_l), + (c_r.fB - c_l.fB) / (t_r - t_l), + (c_r.fA - c_l.fA) / (t_r - t_l), + }; + SkPMColor4f Bs = { + c_l.fR - Fs.fR*t_l, + c_l.fG - Fs.fG*t_l, + c_l.fB - Fs.fB*t_l, + c_l.fA - Fs.fA*t_l, + }; + ctx->ts[stop] = t_l; + add_stop_color(ctx, stop, Fs, Bs); +} + +void SkGradientShaderBase::AppendGradientFillStages(SkRasterPipeline* p, + SkArenaAlloc* alloc, + const SkPMColor4f* pmColors, + const SkScalar* positions, + int count) { + // The two-stop case with stops at 0 and 1. + if (count == 2 && positions == nullptr) { + const SkPMColor4f c_l = pmColors[0], + c_r = pmColors[1]; + + // See F and B below. + auto ctx = alloc->make(); + (skvx::float4::Load(c_r.vec()) - skvx::float4::Load(c_l.vec())).store(ctx->f); + ( skvx::float4::Load(c_l.vec())).store(ctx->b); + + p->append(SkRasterPipelineOp::evenly_spaced_2_stop_gradient, ctx); + } else { + auto* ctx = alloc->make(); + + // Note: In order to handle clamps in search, the search assumes a stop conceptully placed + // at -inf. Therefore, the max number of stops is fColorCount+1. + for (int i = 0; i < 4; i++) { + // Allocate at least at for the AVX2 gather from a YMM register. + ctx->fs[i] = alloc->makeArray(std::max(count + 1, 8)); + ctx->bs[i] = alloc->makeArray(std::max(count + 1, 8)); + } + + if (positions == nullptr) { + // Handle evenly distributed stops. + + size_t stopCount = count; + float gapCount = stopCount - 1; + + SkPMColor4f c_l = pmColors[0]; + for (size_t i = 0; i < stopCount - 1; i++) { + SkPMColor4f c_r = pmColors[i + 1]; + init_stop_evenly(ctx, gapCount, i, c_l, c_r); + c_l = c_r; + } + add_const_color(ctx, stopCount - 1, c_l); + + ctx->stopCount = stopCount; + p->append(SkRasterPipelineOp::evenly_spaced_gradient, ctx); + } else { + // Handle arbitrary stops. + + ctx->ts = alloc->makeArray(count + 1); + + // Remove the default stops inserted by SkGradientShaderBase::SkGradientShaderBase + // because they are naturally handled by the search method. + int firstStop; + int lastStop; + if (count > 2) { + firstStop = pmColors[0] != pmColors[1] ? 0 : 1; + lastStop = pmColors[count - 2] != pmColors[count - 1] ? count - 1 : count - 2; + } else { + firstStop = 0; + lastStop = 1; + } + + size_t stopCount = 0; + float t_l = positions[firstStop]; + SkPMColor4f c_l = pmColors[firstStop]; + add_const_color(ctx, stopCount++, c_l); + // N.B. lastStop is the index of the last stop, not one after. + for (int i = firstStop; i < lastStop; i++) { + float t_r = positions[i + 1]; + SkPMColor4f c_r = pmColors[i + 1]; + SkASSERT(t_l <= t_r); + if (t_l < t_r) { + init_stop_pos(ctx, stopCount, t_l, t_r, c_l, c_r); + stopCount += 1; + } + t_l = t_r; + c_l = c_r; + } + + ctx->ts[stopCount] = t_l; + add_const_color(ctx, stopCount++, c_l); + + ctx->stopCount = stopCount; + p->append(SkRasterPipelineOp::gradient, ctx); + } + } +} + +bool SkGradientShaderBase::appendStages(const SkStageRec& rec, const MatrixRec& mRec) const { + SkRasterPipeline* p = rec.fPipeline; + SkArenaAlloc* alloc = rec.fAlloc; + SkRasterPipeline_DecalTileCtx* decal_ctx = nullptr; + + std::optional newMRec = mRec.apply(rec, fPtsToUnit); + if (!newMRec.has_value()) { + return false; + } + + SkRasterPipeline_<256> postPipeline; + + this->appendGradientStages(alloc, p, &postPipeline); + + switch(fTileMode) { + case SkTileMode::kMirror: p->append(SkRasterPipelineOp::mirror_x_1); break; + case SkTileMode::kRepeat: p->append(SkRasterPipelineOp::repeat_x_1); break; + case SkTileMode::kDecal: + decal_ctx = alloc->make(); + decal_ctx->limit_x = SkBits2Float(SkFloat2Bits(1.0f) + 1); + // reuse mask + limit_x stage, or create a custom decal_1 that just stores the mask + p->append(SkRasterPipelineOp::decal_x, decal_ctx); + [[fallthrough]]; + + case SkTileMode::kClamp: + if (!fPositions) { + // We clamp only when the stops are evenly spaced. + // If not, there may be hard stops, and clamping ruins hard stops at 0 and/or 1. + // In that case, we must make sure we're using the general "gradient" stage, + // which is the only stage that will correctly handle unclamped t. + p->append(SkRasterPipelineOp::clamp_x_1); + } + break; + } + + // Transform all of the colors to destination color space, possibly premultiplied + SkColor4fXformer xformedColors(this, rec.fDstCS); + AppendGradientFillStages(p, alloc, xformedColors.fColors.begin(), fPositions, fColorCount); + + using ColorSpace = Interpolation::ColorSpace; + bool colorIsPremul = this->interpolateInPremul(); + + // If we interpolated premul colors in any of the special color spaces, we need to unpremul + if (colorIsPremul && !fColorsAreOpaque) { + switch (fInterpolation.fColorSpace) { + case ColorSpace::kLab: + case ColorSpace::kOKLab: + p->append(SkRasterPipelineOp::unpremul); + colorIsPremul = false; + break; + case ColorSpace::kLCH: + case ColorSpace::kOKLCH: + case ColorSpace::kHSL: + case ColorSpace::kHWB: + p->append(SkRasterPipelineOp::unpremul_polar); + colorIsPremul = false; + break; + default: break; + } + } + + // Convert colors in exotic spaces back to their intermediate SkColorSpace + switch (fInterpolation.fColorSpace) { + case ColorSpace::kLab: p->append(SkRasterPipelineOp::css_lab_to_xyz); break; + case ColorSpace::kOKLab: p->append(SkRasterPipelineOp::css_oklab_to_linear_srgb); break; + case ColorSpace::kLCH: p->append(SkRasterPipelineOp::css_hcl_to_lab); + p->append(SkRasterPipelineOp::css_lab_to_xyz); break; + case ColorSpace::kOKLCH: p->append(SkRasterPipelineOp::css_hcl_to_lab); + p->append(SkRasterPipelineOp::css_oklab_to_linear_srgb); break; + case ColorSpace::kHSL: p->append(SkRasterPipelineOp::css_hsl_to_srgb); break; + case ColorSpace::kHWB: p->append(SkRasterPipelineOp::css_hwb_to_srgb); break; + default: break; + } + + // Now transform from intermediate to destination color space. + // See comments in GrGradientShader.cpp about the decisions here. + SkColorSpace* dstColorSpace = rec.fDstCS ? rec.fDstCS : sk_srgb_singleton(); + SkAlphaType intermediateAlphaType = colorIsPremul ? kPremul_SkAlphaType : kUnpremul_SkAlphaType; + // TODO(skia:13108): Get dst alpha type correctly + SkAlphaType dstAlphaType = kPremul_SkAlphaType; + + if (fColorsAreOpaque) { + intermediateAlphaType = dstAlphaType = kUnpremul_SkAlphaType; + } + + alloc->make(xformedColors.fIntermediateColorSpace.get(), + intermediateAlphaType, + dstColorSpace, + dstAlphaType) + ->apply(p); + + if (decal_ctx) { + p->append(SkRasterPipelineOp::check_decal_mask, decal_ctx); + } + + p->extend(postPipeline); + + return true; +} + +// Color conversion functions used in gradient interpolation, based on +// https://www.w3.org/TR/css-color-4/#color-conversion-code +static skvm::Color css_lab_to_xyz(skvm::Color lab) { + constexpr float k = 24389 / 27.0f; + constexpr float e = 216 / 24389.0f; + + skvm::F32 f[3]; + f[1] = (lab.r + 16) * (1 / 116.0f); + f[0] = (lab.g * (1 / 500.0f)) + f[1]; + f[2] = f[1] - (lab.b * (1 / 200.0f)); + + skvm::F32 f_cubed[3] = { f[0]*f[0]*f[0], f[1]*f[1]*f[1], f[2]*f[2]*f[2] }; + + skvm::F32 xyz[3] = { + skvm::select(f_cubed[0] > e, f_cubed[0], (116 * f[0] - 16) * (1 / k)), + skvm::select(lab.r > k * e , f_cubed[1], lab.r * (1 / k)), + skvm::select(f_cubed[2] > e, f_cubed[2], (116 * f[2] - 16) * (1 / k)) + }; + + constexpr float D50[3] = { 0.3457f / 0.3585f, 1.0f, (1.0f - 0.3457f - 0.3585f) / 0.3585f }; + return skvm::Color { xyz[0]*D50[0], xyz[1]*D50[1], xyz[2]*D50[2], lab.a }; +} + +// Skia stores all polar colors with hue in the first component, so this "LCH -> Lab" transform +// actually takes "HCL". This is also used to do the same polar transform for OkHCL to OkLAB. +static skvm::Color css_hcl_to_lab(skvm::Color hcl) { + skvm::F32 hueRadians = hcl.r * (SK_FloatPI / 180); + return skvm::Color { + hcl.b, + hcl.g * approx_cos(hueRadians), + hcl.g * approx_sin(hueRadians), + hcl.a + }; +} + +static skvm::Color css_hcl_to_xyz(skvm::Color hcl) { + return css_lab_to_xyz(css_hcl_to_lab(hcl)); +} + +static skvm::Color css_oklab_to_linear_srgb(skvm::Color oklab) { + skvm::F32 l_ = oklab.r + 0.3963377774f * oklab.g + 0.2158037573f * oklab.b, + m_ = oklab.r - 0.1055613458f * oklab.g - 0.0638541728f * oklab.b, + s_ = oklab.r - 0.0894841775f * oklab.g - 1.2914855480f * oklab.b; + + skvm::F32 l = l_*l_*l_, + m = m_*m_*m_, + s = s_*s_*s_; + + return skvm::Color { + +4.0767416621f * l - 3.3077115913f * m + 0.2309699292f * s, + -1.2684380046f * l + 2.6097574011f * m - 0.3413193965f * s, + -0.0041960863f * l - 0.7034186147f * m + 1.7076147010f * s, + oklab.a + }; + +} + +static skvm::Color css_okhcl_to_linear_srgb(skvm::Color okhcl) { + return css_oklab_to_linear_srgb(css_hcl_to_lab(okhcl)); +} + +static skvm::F32 mod_f(skvm::F32 x, float y) { + return x - y * skvm::floor(x * (1 / y)); +} + +static skvm::Color css_hsl_to_srgb(skvm::Color hsl) { + hsl.r = mod_f(hsl.r, 360); + hsl.r = skvm::select(hsl.r < 0, hsl.r + 360, hsl.r); + + hsl.g *= 0.01f; + hsl.b *= 0.01f; + + skvm::F32 k[3] = { + mod_f(0 + hsl.r * (1 / 30.0f), 12), + mod_f(8 + hsl.r * (1 / 30.0f), 12), + mod_f(4 + hsl.r * (1 / 30.0f), 12), + }; + skvm::F32 a = hsl.g * min(hsl.b, 1 - hsl.b); + return skvm::Color { + hsl.b - a * clamp(min(k[0] - 3, 9 - k[0]), -1, 1), + hsl.b - a * clamp(min(k[1] - 3, 9 - k[1]), -1, 1), + hsl.b - a * clamp(min(k[2] - 3, 9 - k[2]), -1, 1), + hsl.a + }; +} + +static skvm::Color css_hwb_to_srgb(skvm::Color hwb, skvm::Builder* p) { + hwb.g *= 0.01f; + hwb.b *= 0.01f; + + skvm::F32 gray = hwb.g / (hwb.g + hwb.b); + + skvm::Color rgb = css_hsl_to_srgb(skvm::Color{hwb.r, p->splat(100.0f), p->splat(50.0f), hwb.a}); + rgb.r = rgb.r * (1 - hwb.g - hwb.b) + hwb.g; + rgb.g = rgb.g * (1 - hwb.g - hwb.b) + hwb.g; + rgb.b = rgb.b * (1 - hwb.g - hwb.b) + hwb.g; + + skvm::I32 isGray = (hwb.g + hwb.b) >= 1; + + return skvm::Color { + select(isGray, gray, rgb.r), + select(isGray, gray, rgb.g), + select(isGray, gray, rgb.b), + hwb.a + }; +} + +skvm::Color SkGradientShaderBase::program(skvm::Builder* p, + skvm::Coord device, + skvm::Coord local, + skvm::Color /*paint*/, + const MatrixRec& mRec, + const SkColorInfo& dstInfo, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const { + if (!mRec.apply(p, &local, uniforms, fPtsToUnit).has_value()) { + return {}; + } + + skvm::I32 mask = p->splat(~0); + skvm::F32 t = this->transformT(p,uniforms, local, &mask); + + // Perhaps unexpectedly, clamping is handled naturally by our search, so we + // don't explicitly clamp t to [0,1]. That clamp would break hard stops + // right at 0 or 1 boundaries in kClamp mode. (kRepeat and kMirror always + // produce values in [0,1].) + switch(fTileMode) { + case SkTileMode::kClamp: + break; + + case SkTileMode::kDecal: + mask &= (t == clamp01(t)); + break; + + case SkTileMode::kRepeat: + t = fract(t); + break; + + case SkTileMode::kMirror: { + // t = | (t-1) - 2*(floor( (t-1)*0.5 )) - 1 | + // {-A-} {--------B-------} + skvm::F32 A = t - 1.0f, + B = floor(A * 0.5f); + t = abs(A - (B + B) - 1.0f); + } break; + } + + // Transform our colors as we want them interpolated, in dst color space, possibly premul. + SkColor4fXformer xformedColors(this, dstInfo.colorSpace()); + const SkPMColor4f* rgba = xformedColors.fColors.begin(); + + // Transform our colors into a scale factor f and bias b such that for + // any t between stops i and i+1, the color we want is mad(t, f[i], b[i]). + using F4 = skvx::Vec<4,float>; + struct FB { F4 f,b; }; + skvm::Color color; + + auto uniformF = [&](float x) { return p->uniformF(uniforms->pushF(x)); }; + + if (fColorCount == 2) { + // 2-stop gradients have colors at 0 and 1, and so must be evenly spaced. + SkASSERT(fPositions == nullptr); + + // With 2 stops, we upload the single FB as uniforms and interpolate directly with t. + F4 lo = F4::Load(rgba + 0), + hi = F4::Load(rgba + 1); + F4 F = hi - lo, + B = lo; + + auto T = clamp01(t); + color = { + T * uniformF(F[0]) + uniformF(B[0]), + T * uniformF(F[1]) + uniformF(B[1]), + T * uniformF(F[2]) + uniformF(B[2]), + T * uniformF(F[3]) + uniformF(B[3]), + }; + } else { + // To handle clamps in search we add a conceptual stop at t=-inf, so we + // may need up to fColorCount+1 FBs and fColorCount t stops between them: + // + // FBs: [color 0] [color 0->1] [color 1->2] [color 2->3] ... + // stops: (-inf) t0 t1 t2 ... + // + // Both these arrays could end up shorter if any hard stops share the same t. + FB* fb = alloc->makeArrayDefault(fColorCount+1); + std::vector stops; // TODO: SkSTArray? + stops.reserve(fColorCount); + + // Here's our conceptual stop at t=-inf covering all t<=0, clamping to our first color. + float t_lo = this->getPos(0); + F4 color_lo = F4::Load(rgba); + fb[0] = { 0.0f, color_lo }; + // N.B. No stops[] entry for this implicit -inf. + + // Now the non-edge cases, calculating scale and bias between adjacent normal stops. + for (int i = 1; i < fColorCount; i++) { + float t_hi = this->getPos(i); + F4 color_hi = F4::Load(rgba + i); + + // If t_lo == t_hi, we're on a hard stop, and transition immediately to the next color. + SkASSERT(t_lo <= t_hi); + if (t_lo < t_hi) { + F4 f = (color_hi - color_lo) / (t_hi - t_lo), + b = color_lo - f*t_lo; + stops.push_back(t_lo); + fb[stops.size()] = {f,b}; + } + + t_lo = t_hi; + color_lo = color_hi; + } + // Anything >= our final t clamps to our final color. + stops.push_back(t_lo); + fb[stops.size()] = { 0.0f, color_lo }; + + // We'll gather FBs from that array we just created. + skvm::Uniform fbs = uniforms->pushPtr(fb); + + // Find the two stops we need to interpolate. + skvm::I32 ix; + if (fPositions == nullptr) { + // Evenly spaced stops... we can calculate ix directly. + ix = trunc(clamp(t * uniformF(stops.size() - 1) + 1.0f, 0.0f, uniformF(stops.size()))); + } else { + // Starting ix at 0 bakes in our conceptual first stop at -inf. + // TODO: good place to experiment with a loop in skvm.... stops.size() can be huge. + ix = p->splat(0); + for (float stop : stops) { + // ix += (t >= stop) ? +1 : 0 ~~> + // ix -= (t >= stop) ? -1 : 0 + ix -= (t >= uniformF(stop)); + } + // TODO: we could skip any of the default stops GradientShaderBase's ctor added + // to ensure the full [0,1] span is covered. This linear search doesn't need + // them for correctness, and it'd be up to two fewer stops to check. + // N.B. we do still need those stops for the fPositions == nullptr direct math path. + } + + // A scale factor and bias for each lane, 8 total. + // TODO: simpler, faster, tidier to push 8 uniform pointers, one for each struct lane? + ix = shl(ix, 3); + skvm::F32 Fr = gatherF(fbs, ix + 0); + skvm::F32 Fg = gatherF(fbs, ix + 1); + skvm::F32 Fb = gatherF(fbs, ix + 2); + skvm::F32 Fa = gatherF(fbs, ix + 3); + + skvm::F32 Br = gatherF(fbs, ix + 4); + skvm::F32 Bg = gatherF(fbs, ix + 5); + skvm::F32 Bb = gatherF(fbs, ix + 6); + skvm::F32 Ba = gatherF(fbs, ix + 7); + + // This is what we've been building towards! + color = { + t * Fr + Br, + t * Fg + Bg, + t * Fb + Bb, + t * Fa + Ba, + }; + } + + using ColorSpace = Interpolation::ColorSpace; + bool colorIsPremul = this->interpolateInPremul(); + + // If we interpolated premul colors in any of the special color spaces, we need to unpremul + if (colorIsPremul) { + switch (fInterpolation.fColorSpace) { + case ColorSpace::kLab: + case ColorSpace::kOKLab: + color = unpremul(color); + colorIsPremul = false; + break; + case ColorSpace::kLCH: + case ColorSpace::kOKLCH: + case ColorSpace::kHSL: + case ColorSpace::kHWB: { + // Avoid unpremuling hue + skvm::F32 hue = color.r; + color = unpremul(color); + color.r = hue; + colorIsPremul = false; + } break; + default: break; + } + } + + // Convert colors in exotic spaces back to their intermediate SkColorSpace + switch (fInterpolation.fColorSpace) { + case ColorSpace::kLab: color = css_lab_to_xyz(color); break; + case ColorSpace::kOKLab: color = css_oklab_to_linear_srgb(color); break; + case ColorSpace::kLCH: color = css_hcl_to_xyz(color); break; + case ColorSpace::kOKLCH: color = css_okhcl_to_linear_srgb(color); break; + case ColorSpace::kHSL: color = css_hsl_to_srgb(color); break; + case ColorSpace::kHWB: color = css_hwb_to_srgb(color, p); break; + default: break; + } + + // Now transform from intermediate to destination color space. + // See comments in GrGradientShader.cpp about the decisions here. + SkColorSpace* dstColorSpace = dstInfo.colorSpace() ? dstInfo.colorSpace() : sk_srgb_singleton(); + SkAlphaType intermediateAlphaType = colorIsPremul ? kPremul_SkAlphaType : kUnpremul_SkAlphaType; + SkAlphaType dstAlphaType = dstInfo.alphaType(); + + if (fColorsAreOpaque) { + intermediateAlphaType = dstAlphaType = kUnpremul_SkAlphaType; + } + + color = SkColorSpaceXformSteps{xformedColors.fIntermediateColorSpace.get(), + intermediateAlphaType, + dstColorSpace, + dstAlphaType} + .program(p, uniforms, color); + + return { + pun_to_F32(mask & pun_to_I32(color.r)), + pun_to_F32(mask & pun_to_I32(color.g)), + pun_to_F32(mask & pun_to_I32(color.b)), + pun_to_F32(mask & pun_to_I32(color.a)), + }; +} + +bool SkGradientShaderBase::isOpaque() const { + return fColorsAreOpaque && (this->getTileMode() != SkTileMode::kDecal); +} + +static unsigned rounded_divide(unsigned numer, unsigned denom) { + return (numer + (denom >> 1)) / denom; +} + +bool SkGradientShaderBase::onAsLuminanceColor(SkColor* lum) const { + // we just compute an average color. + // possibly we could weight this based on the proportional width for each color + // assuming they are not evenly distributed in the fPos array. + int r = 0; + int g = 0; + int b = 0; + const int n = fColorCount; + // TODO: use linear colors? + for (int i = 0; i < n; ++i) { + SkColor c = this->getLegacyColor(i); + r += SkColorGetR(c); + g += SkColorGetG(c); + b += SkColorGetB(c); + } + *lum = SkColorSetRGB(rounded_divide(r, n), rounded_divide(g, n), rounded_divide(b, n)); + return true; +} + +static sk_sp intermediate_color_space(SkGradientShader::Interpolation::ColorSpace cs, + SkColorSpace* dst) { + using ColorSpace = SkGradientShader::Interpolation::ColorSpace; + switch (cs) { + case ColorSpace::kDestination: return sk_ref_sp(dst); + + // css-color-4 allows XYZD50 and XYZD65. For gradients, those are redundant. Interpolating + // in any linear RGB space, (regardless of white point), gives the same answer. + case ColorSpace::kSRGBLinear: return SkColorSpace::MakeSRGBLinear(); + + case ColorSpace::kSRGB: + case ColorSpace::kHSL: + case ColorSpace::kHWB: return SkColorSpace::MakeSRGB(); + + case ColorSpace::kLab: + case ColorSpace::kLCH: + // Conversion to Lab (and LCH) starts with XYZD50 + return SkColorSpace::MakeRGB(SkNamedTransferFn::kLinear, SkNamedGamut::kXYZ); + + case ColorSpace::kOKLab: + case ColorSpace::kOKLCH: + // The "standard" conversion to these spaces starts with XYZD65. That requires extra + // effort to conjure. The author also has reference code for going directly from linear + // sRGB, so we use that. + // TODO(skia:13108): Even better would be to have an LMS color space, because the first + // part of the conversion is a matrix multiply, which could be absorbed into the + // color space xform. + return SkColorSpace::MakeSRGBLinear(); + } + SkUNREACHABLE; +} + +typedef SkPMColor4f (*ConvertColorProc)(SkPMColor4f); + +static SkPMColor4f srgb_to_hsl(SkPMColor4f rgb) { + float mx = std::max({rgb.fR, rgb.fG, rgb.fB}); + float mn = std::min({rgb.fR, rgb.fG, rgb.fB}); + float hue = 0, sat = 0, light = (mn + mx) / 2; + float d = mx - mn; + + if (d != 0) { + sat = (light == 0 || light == 1) ? 0 : (mx - light) / std::min(light, 1 - light); + if (mx == rgb.fR) { + hue = (rgb.fG - rgb.fB) / d + (rgb.fG < rgb.fB ? 6 : 0); + } else if (mx == rgb.fG) { + hue = (rgb.fB - rgb.fR) / d + 2; + } else { + hue = (rgb.fR - rgb.fG) / d + 4; + } + + hue *= 60; + } + return { hue, sat * 100, light * 100, rgb.fA }; +} + +static SkPMColor4f srgb_to_hwb(SkPMColor4f rgb) { + SkPMColor4f hsl = srgb_to_hsl(rgb); + float white = std::min({rgb.fR, rgb.fG, rgb.fB}); + float black = 1 - std::max({rgb.fR, rgb.fG, rgb.fB}); + return { hsl.fR, white * 100, black * 100, rgb.fA }; +} + +static SkPMColor4f xyzd50_to_lab(SkPMColor4f xyz) { + constexpr float D50[3] = { 0.3457f / 0.3585f, 1.0f, (1.0f - 0.3457f - 0.3585f) / 0.3585f }; + + constexpr float e = 216.0f / 24389; + constexpr float k = 24389.0f / 27; + + SkPMColor4f f; + for (int i = 0; i < 3; ++i) { + float v = xyz[i] / D50[i]; + f[i] = (v > e) ? std::cbrtf(v) : (k * v + 16) / 116; + } + + return { (116 * f[1]) - 16, 500 * (f[0] - f[1]), 200 * (f[1] - f[2]), xyz.fA }; +} + +// The color space is technically LCH, but we produce HCL, so that all polar spaces have hue in the +// first component. This simplifies the hue handling for HueMethod and premul/unpremul. +static SkPMColor4f xyzd50_to_hcl(SkPMColor4f xyz) { + SkPMColor4f Lab = xyzd50_to_lab(xyz); + float hue = sk_float_radians_to_degrees(atan2f(Lab[2], Lab[1])); + return {hue >= 0 ? hue : hue + 360, + sqrtf(Lab[1] * Lab[1] + Lab[2] * Lab[2]), + Lab[0], + xyz.fA}; +} + +// https://bottosson.github.io/posts/oklab/#converting-from-linear-srgb-to-oklab +static SkPMColor4f lin_srgb_to_oklab(SkPMColor4f rgb) { + float l = 0.4122214708f * rgb.fR + 0.5363325363f * rgb.fG + 0.0514459929f * rgb.fB; + float m = 0.2119034982f * rgb.fR + 0.6806995451f * rgb.fG + 0.1073969566f * rgb.fB; + float s = 0.0883024619f * rgb.fR + 0.2817188376f * rgb.fG + 0.6299787005f * rgb.fB; + l = std::cbrtf(l); + m = std::cbrtf(m); + s = std::cbrtf(s); + return { + 0.2104542553f*l + 0.7936177850f*m - 0.0040720468f*s, + 1.9779984951f*l - 2.4285922050f*m + 0.4505937099f*s, + 0.0259040371f*l + 0.7827717662f*m - 0.8086757660f*s, + rgb.fA + }; +} + +// The color space is technically OkLCH, but we produce HCL, so that all polar spaces have hue in +// the first component. This simplifies the hue handling for HueMethod and premul/unpremul. +static SkPMColor4f lin_srgb_to_okhcl(SkPMColor4f rgb) { + SkPMColor4f OKLab = lin_srgb_to_oklab(rgb); + float hue = sk_float_radians_to_degrees(atan2f(OKLab[2], OKLab[1])); + return {hue >= 0 ? hue : hue + 360, + sqrtf(OKLab[1] * OKLab[1] + OKLab[2] * OKLab[2]), + OKLab[0], + rgb.fA}; +} + +static SkPMColor4f premul_polar(SkPMColor4f hsl) { + return { hsl.fR, hsl.fG * hsl.fA, hsl.fB * hsl.fA, hsl.fA }; +} + +static SkPMColor4f premul_rgb(SkPMColor4f rgb) { + return { rgb.fR * rgb.fA, rgb.fG * rgb.fA, rgb.fB * rgb.fA, rgb.fA }; +} + +static bool color_space_is_polar(SkGradientShader::Interpolation::ColorSpace cs) { + using ColorSpace = SkGradientShader::Interpolation::ColorSpace; + switch (cs) { + case ColorSpace::kLCH: + case ColorSpace::kOKLCH: + case ColorSpace::kHSL: + case ColorSpace::kHWB: + return true; + default: + return false; + } +} + +// Given `colors` in `src` color space, an interpolation space, and a `dst` color space, +// we are doing several things. First, some definitions: +// +// The interpolation color space is "special" if it can't be represented as an SkColorSpace. This +// applies to any color space that isn't an RGB space, like Lab or HSL. These need special handling +// because we have to run bespoke code to do the conversion (before interpolation here, and after +// interpolation in the backend shader/pipeline). +// +// The interpolation color space is "polar" if it involves hue (HSL, HWB, LCH, Oklch). These need +// special handling, becuase hue is never premultiplied, and because HueMethod comes into play. +// +// 1) Pick an `intermediate` SkColorSpace. If the interpolation color space is not "special", +// (kDestination, kSRGB, etc... ), then `intermediate` is exact. Otherwise, `intermediate` is the +// RGB space that prepares us to do the final conversion. For example, conversion to Lab starts +// with XYZD50, so `intermediate` will be XYZD50 if we're actually interpolating in Lab. +// 2) Transform all colors to the `intermediate` color space, leaving them unpremultiplied. +// 3) If the interpolation color space is "special", transform the colors to that space. +// 4) If the interpolation color space is "polar", adjust the angles to respect HueMethod. +// 5) If premul interpolation is requested, apply that. For "polar" interpolated colors, don't +// premultiply hue, only the other two channels. Note that there are four polar spaces. +// Two have hue as the first component, and two have it as the third component. To reduce +// complexity, we always store hue in the first component, swapping it with luminance for +// LCH and Oklch. The backend code (eg, shaders) needs to know about this. +SkColor4fXformer::SkColor4fXformer(const SkGradientShaderBase* shader, SkColorSpace* dst) { + using ColorSpace = SkGradientShader::Interpolation::ColorSpace; + using HueMethod = SkGradientShader::Interpolation::HueMethod; + + const int colorCount = shader->fColorCount; + const SkGradientShader::Interpolation interpolation = shader->fInterpolation; + + // 1) Determine the color space of our intermediate colors + fIntermediateColorSpace = intermediate_color_space(interpolation.fColorSpace, dst); + + // 2) Convert all colors to the intermediate color space + auto info = SkImageInfo::Make(colorCount, 1, kRGBA_F32_SkColorType, kUnpremul_SkAlphaType); + + auto dstInfo = info.makeColorSpace(fIntermediateColorSpace); + auto srcInfo = info.makeColorSpace(shader->fColorSpace); + + fColors.reset(colorCount); + SkAssertResult(SkConvertPixels(dstInfo, fColors.begin(), info.minRowBytes(), + srcInfo, shader->fColors, info.minRowBytes())); + + // 3) Transform to the interpolation color space (if it's special) + ConvertColorProc convertFn = nullptr; + switch (interpolation.fColorSpace) { + case ColorSpace::kHSL: convertFn = srgb_to_hsl; break; + case ColorSpace::kHWB: convertFn = srgb_to_hwb; break; + case ColorSpace::kLab: convertFn = xyzd50_to_lab; break; + case ColorSpace::kLCH: convertFn = xyzd50_to_hcl; break; + case ColorSpace::kOKLab: convertFn = lin_srgb_to_oklab; break; + case ColorSpace::kOKLCH: convertFn = lin_srgb_to_okhcl; break; + default: break; + } + + if (convertFn) { + for (int i = 0; i < colorCount; ++i) { + fColors[i] = convertFn(fColors[i]); + } + } + + // 4) For polar colors, adjust hue values to respect the hue method. We're using a trick here... + // The specification looks at adjacent colors, and adjusts one or the other. Because we store + // the stops in uniforms (and our backend conversions normalize the hue angle), we can + // instead always apply the adjustment to the *second* color. That lets us keep a running + // total, and do a single pass across all the colors to respect the requested hue method, + // without needing to do any extra work per-pixel. + if (color_space_is_polar(interpolation.fColorSpace)) { + float delta = 0; + for (int i = 0; i < colorCount - 1; ++i) { + float h1 = fColors[i].fR; + float& h2 = fColors[i+1].fR; + h2 += delta; + switch (interpolation.fHueMethod) { + case HueMethod::kShorter: + if (h2 - h1 > 180) { + h2 -= 360; // i.e. h1 += 360 + delta -= 360; + } else if (h2 - h1 < -180) { + h2 += 360; + delta += 360; + } + break; + case HueMethod::kLonger: + if ((i == 0 && shader->fFirstStopIsImplicit) || + (i == colorCount - 2 && shader->fLastStopIsImplicit)) { + // Do nothing. We don't want to introduce a full revolution for these stops + // Full rationale at skbug.com/13941 + } else if (0 < h2 - h1 && h2 - h1 < 180) { + h2 -= 360; // i.e. h1 += 360 + delta -= 360; + } else if (-180 < h2 - h1 && h2 - h1 <= 0) { + h2 += 360; + delta += 360; + } + break; + case HueMethod::kIncreasing: + if (h2 < h1) { + h2 += 360; + delta += 360; + } + break; + case HueMethod::kDecreasing: + if (h1 < h2) { + h2 -= 360; // i.e. h1 += 360; + delta -= 360; + } + break; + } + } + } + + // 5) Apply premultiplication + ConvertColorProc premulFn = nullptr; + if (static_cast(interpolation.fInPremul)) { + switch (interpolation.fColorSpace) { + case ColorSpace::kHSL: + case ColorSpace::kHWB: + case ColorSpace::kLCH: + case ColorSpace::kOKLCH: premulFn = premul_polar; break; + default: premulFn = premul_rgb; break; + } + } + + if (premulFn) { + for (int i = 0; i < colorCount; ++i) { + fColors[i] = premulFn(fColors[i]); + } + } +} + +SkColorConverter::SkColorConverter(const SkColor* colors, int count) { + const float ONE_OVER_255 = 1.f / 255; + for (int i = 0; i < count; ++i) { + fColors4f.push_back({ SkColorGetR(colors[i]) * ONE_OVER_255, + SkColorGetG(colors[i]) * ONE_OVER_255, + SkColorGetB(colors[i]) * ONE_OVER_255, + SkColorGetA(colors[i]) * ONE_OVER_255 }); + } +} + +void SkGradientShaderBase::commonAsAGradient(GradientInfo* info) const { + if (info) { + if (info->fColorCount >= fColorCount) { + if (info->fColors) { + for (int i = 0; i < fColorCount; ++i) { + info->fColors[i] = this->getLegacyColor(i); + } + } + if (info->fColorOffsets) { + for (int i = 0; i < fColorCount; ++i) { + info->fColorOffsets[i] = this->getPos(i); + } + } + } + info->fColorCount = fColorCount; + info->fTileMode = fTileMode; + + info->fGradientFlags = + this->interpolateInPremul() ? SkGradientShader::kInterpolateColorsInPremul_Flag : 0; + } +} + +// Return true if these parameters are valid/legal/safe to construct a gradient +// +bool SkGradientShaderBase::ValidGradient(const SkColor4f colors[], int count, SkTileMode tileMode, + const Interpolation& interpolation) { + return nullptr != colors && count >= 1 && (unsigned)tileMode < kSkTileModeCount && + (unsigned)interpolation.fColorSpace < Interpolation::kColorSpaceCount && + (unsigned)interpolation.fHueMethod < Interpolation::kHueMethodCount; +} + +SkGradientShaderBase::Descriptor::Descriptor(const SkColor4f colors[], + sk_sp colorSpace, + const SkScalar positions[], + int colorCount, + SkTileMode mode, + const Interpolation& interpolation) + : fColors(colors) + , fColorSpace(std::move(colorSpace)) + , fPositions(positions) + , fColorCount(colorCount) + , fTileMode(mode) + , fInterpolation(interpolation) { + SkASSERT(fColorCount > 1); +} + +static SkColor4f average_gradient_color(const SkColor4f colors[], const SkScalar pos[], + int colorCount) { + // The gradient is a piecewise linear interpolation between colors. For a given interval, + // the integral between the two endpoints is 0.5 * (ci + cj) * (pj - pi), which provides that + // intervals average color. The overall average color is thus the sum of each piece. The thing + // to keep in mind is that the provided gradient definition may implicitly use p=0 and p=1. + skvx::float4 blend(0.0f); + for (int i = 0; i < colorCount - 1; ++i) { + // Calculate the average color for the interval between pos(i) and pos(i+1) + auto c0 = skvx::float4::Load(&colors[i]); + auto c1 = skvx::float4::Load(&colors[i + 1]); + + // when pos == null, there are colorCount uniformly distributed stops, going from 0 to 1, + // so pos[i + 1] - pos[i] = 1/(colorCount-1) + SkScalar w; + if (pos) { + // Match position fixing in SkGradientShader's constructor, clamping positions outside + // [0, 1] and forcing the sequence to be monotonic + SkScalar p0 = SkTPin(pos[i], 0.f, 1.f); + SkScalar p1 = SkTPin(pos[i + 1], p0, 1.f); + w = p1 - p0; + + // And account for any implicit intervals at the start or end of the positions + if (i == 0) { + if (p0 > 0.0f) { + // The first color is fixed between p = 0 to pos[0], so 0.5*(ci + cj)*(pj - pi) + // becomes 0.5*(c + c)*(pj - 0) = c * pj + auto c = skvx::float4::Load(&colors[0]); + blend += p0 * c; + } + } + if (i == colorCount - 2) { + if (p1 < 1.f) { + // The last color is fixed between pos[n-1] to p = 1, so 0.5*(ci + cj)*(pj - pi) + // becomes 0.5*(c + c)*(1 - pi) = c * (1 - pi) + auto c = skvx::float4::Load(&colors[colorCount - 1]); + blend += (1.f - p1) * c; + } + } + } else { + w = 1.f / (colorCount - 1); + } + + blend += 0.5f * w * (c1 + c0); + } + + SkColor4f avg; + blend.store(&avg); + return avg; +} + +// Except for special circumstances of clamped gradients, every gradient shape--when degenerate-- +// can be mapped to the same fallbacks. The specific shape factories must account for special +// clamped conditions separately, this will always return the last color for clamped gradients. +sk_sp SkGradientShaderBase::MakeDegenerateGradient(const SkColor4f colors[], + const SkScalar pos[], + int colorCount, + sk_sp colorSpace, + SkTileMode mode) { + switch(mode) { + case SkTileMode::kDecal: + // normally this would reject the area outside of the interpolation region, so since + // inside region is empty when the radii are equal, the entire draw region is empty + return SkShaders::Empty(); + case SkTileMode::kRepeat: + case SkTileMode::kMirror: + // repeat and mirror are treated the same: the border colors are never visible, + // but approximate the final color as infinite repetitions of the colors, so + // it can be represented as the average color of the gradient. + return SkShaders::Color( + average_gradient_color(colors, pos, colorCount), std::move(colorSpace)); + case SkTileMode::kClamp: + // Depending on how the gradient shape degenerates, there may be a more specialized + // fallback representation for the factories to use, but this is a reasonable default. + return SkShaders::Color(colors[colorCount - 1], std::move(colorSpace)); + } + SkDEBUGFAIL("Should not be reached"); + return nullptr; +} + +SkGradientShaderBase::ColorStopOptimizer::ColorStopOptimizer(const SkColor4f* colors, + const SkScalar* pos, + int count, + SkTileMode mode) + : fColors(colors) + , fPos(pos) + , fCount(count) { + + if (!pos || count != 3) { + return; + } + + if (SkScalarNearlyEqual(pos[0], 0.0f) && + SkScalarNearlyEqual(pos[1], 0.0f) && + SkScalarNearlyEqual(pos[2], 1.0f)) { + + if (SkTileMode::kRepeat == mode || SkTileMode::kMirror == mode || + colors[0] == colors[1]) { + + // Ignore the leftmost color/pos. + fColors += 1; + fPos += 1; + fCount = 2; + } + } else if (SkScalarNearlyEqual(pos[0], 0.0f) && + SkScalarNearlyEqual(pos[1], 1.0f) && + SkScalarNearlyEqual(pos[2], 1.0f)) { + + if (SkTileMode::kRepeat == mode || SkTileMode::kMirror == mode || + colors[1] == colors[2]) { + + // Ignore the rightmost color/pos. + fCount = 2; + } + } +} + +#if defined(SK_GRAPHITE) +// Please see GrGradientShader.cpp::make_interpolated_to_dst for substantial comments +// as to why this code is structured this way. +void SkGradientShaderBase::MakeInterpolatedToDst( + const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer, + const skgpu::graphite::GradientShaderBlocks::GradientData& gradData, + const SkGradientShaderBase::Interpolation& interp, + SkColorSpace* intermediateCS) { + using ColorSpace = SkGradientShader::Interpolation::ColorSpace; + using namespace skgpu::graphite; + + bool inputPremul = static_cast(interp.fInPremul); + + switch (interp.fColorSpace) { + case ColorSpace::kLab: + case ColorSpace::kOKLab: + case ColorSpace::kLCH: + case ColorSpace::kOKLCH: + case ColorSpace::kHSL: + case ColorSpace::kHWB: + inputPremul = false; + break; + default: + break; + } + + const SkColorInfo& dstColorInfo = keyContext.dstColorInfo(); + + SkColorSpace* dstColorSpace = dstColorInfo.colorSpace() ? dstColorInfo.colorSpace() + : sk_srgb_singleton(); + + SkAlphaType intermediateAlphaType = inputPremul ? kPremul_SkAlphaType + : kUnpremul_SkAlphaType; + + ColorSpaceTransformBlock::ColorSpaceTransformData data(intermediateCS, intermediateAlphaType, + dstColorSpace, dstColorInfo.alphaType()); + + // The gradient block and colorSpace conversion block need to be combined together + // (via the colorFilterShader block) so that the localMatrix block can treat them as + // one child. + ColorFilterShaderBlock::BeginBlock(keyContext, builder, gatherer); + + GradientShaderBlocks::BeginBlock(keyContext, builder, gatherer, gradData); + builder->endBlock(); + + ColorSpaceTransformBlock::BeginBlock(keyContext, builder, gatherer, &data); + builder->endBlock(); + + builder->endBlock(); +} +#endif diff --git a/gfx/skia/skia/src/shaders/gradients/SkGradientShaderBase.h b/gfx/skia/skia/src/shaders/gradients/SkGradientShaderBase.h new file mode 100644 index 0000000000..fc677cfaed --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkGradientShaderBase.h @@ -0,0 +1,192 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkGradientShaderPriv_DEFINED +#define SkGradientShaderPriv_DEFINED + +#include "include/effects/SkGradientShader.h" + +#include "include/core/SkMatrix.h" +#include "include/private/base/SkTArray.h" +#include "include/private/base/SkTemplates.h" +#include "src/core/SkVM.h" +#include "src/shaders/SkShaderBase.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyHelpers.h" +#endif + +class SkArenaAlloc; +class SkColorSpace; +class SkRasterPipeline; +class SkReadBuffer; +class SkWriteBuffer; + +class SkGradientShaderBase : public SkShaderBase { +public: + using Interpolation = SkGradientShader::Interpolation; + + struct Descriptor { + Descriptor(); + ~Descriptor(); + + Descriptor(const SkColor4f colors[], + sk_sp colorSpace, + const SkScalar positions[], + int colorCount, + SkTileMode mode, + const Interpolation& interpolation); + + const SkColor4f* fColors; + sk_sp fColorSpace; + const SkScalar* fPositions; + int fColorCount; // length of fColors (and fPositions, if not nullptr) + SkTileMode fTileMode; + Interpolation fInterpolation; + }; + + class DescriptorScope : public Descriptor { + public: + DescriptorScope() {} + + bool unflatten(SkReadBuffer&, SkMatrix* legacyLocalMatrix); + + private: + SkSTArray<16, SkColor4f, true> fColorStorage; + SkSTArray<16, SkScalar , true> fPositionStorage; + }; + + SkGradientShaderBase(const Descriptor& desc, const SkMatrix& ptsToUnit); + ~SkGradientShaderBase() override; + + bool isOpaque() const override; + + bool interpolateInPremul() const { + return fInterpolation.fInPremul == SkGradientShader::Interpolation::InPremul::kYes; + } + + const SkMatrix& getGradientMatrix() const { return fPtsToUnit; } + + static bool ValidGradient(const SkColor4f colors[], int count, SkTileMode tileMode, + const Interpolation& interpolation); + + static sk_sp MakeDegenerateGradient(const SkColor4f colors[], const SkScalar pos[], + int colorCount, sk_sp colorSpace, + SkTileMode mode); + + struct ColorStopOptimizer { + ColorStopOptimizer(const SkColor4f* colors, const SkScalar* pos, int count, + SkTileMode mode); + + const SkColor4f* fColors; + const SkScalar* fPos; + int fCount; + }; + + // The default SkScalarNearlyZero threshold of .0024 is too big and causes regressions for svg + // gradients defined in the wild. + static constexpr SkScalar kDegenerateThreshold = SK_Scalar1 / (1 << 15); + +protected: + void flatten(SkWriteBuffer&) const override; + + void commonAsAGradient(GradientInfo*) const; + + bool onAsLuminanceColor(SkColor*) const override; + + bool appendStages(const SkStageRec&, const MatrixRec&) const override; + + skvm::Color program(skvm::Builder*, + skvm::Coord device, + skvm::Coord local, + skvm::Color paint, + const MatrixRec&, + const SkColorInfo& dstCS, + skvm::Uniforms* uniforms, + SkArenaAlloc* alloc) const override; + + virtual void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline, + SkRasterPipeline* postPipeline) const = 0; + + // Produce t from (x,y), modifying mask if it should be anything other than ~0. + virtual skvm::F32 transformT(skvm::Builder*, skvm::Uniforms*, + skvm::Coord coord, skvm::I32* mask) const = 0; + + const SkMatrix fPtsToUnit; + SkTileMode fTileMode; + +#if defined(SK_GRAPHITE) + static void MakeInterpolatedToDst(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*, + const skgpu::graphite::GradientShaderBlocks::GradientData&, + const SkGradientShaderBase::Interpolation&, + SkColorSpace* intermediateCS); +#endif + +public: + static void AppendGradientFillStages(SkRasterPipeline* p, + SkArenaAlloc* alloc, + const SkPMColor4f* colors, + const SkScalar* positions, + int count); + + SkScalar getPos(int i) const { + SkASSERT(i < fColorCount); + return fPositions ? fPositions[i] : SkIntToScalar(i) / (fColorCount - 1); + } + + SkColor getLegacyColor(int i) const { + SkASSERT(i < fColorCount); + return fColors[i].toSkColor(); + } + + SkColor4f* fColors; // points into fStorage + SkScalar* fPositions; // points into fStorage, or nullptr + int fColorCount; // length of fColors (and fPositions, if not nullptr) + sk_sp fColorSpace; // color space of gradient stops + Interpolation fInterpolation; + bool fFirstStopIsImplicit; + bool fLastStopIsImplicit; + + bool colorsAreOpaque() const { return fColorsAreOpaque; } + + SkTileMode getTileMode() const { return fTileMode; } + +private: + // Reserve inline space for up to 4 stops. + inline static constexpr size_t kInlineStopCount = 4; + inline static constexpr size_t kInlineStorageSize = (sizeof(SkColor4f) + sizeof(SkScalar)) + * kInlineStopCount; + skia_private::AutoSTMalloc fStorage; + + bool fColorsAreOpaque; + + using INHERITED = SkShaderBase; +}; + +/////////////////////////////////////////////////////////////////////////////// + +struct SkColor4fXformer { + SkColor4fXformer(const SkGradientShaderBase* shader, SkColorSpace* dst); + + SkSTArray<4, SkPMColor4f, true> fColors; + sk_sp fIntermediateColorSpace; +}; + +struct SkColorConverter { + SkColorConverter(const SkColor* colors, int count); + + SkSTArray<2, SkColor4f, true> fColors4f; +}; + +void SkRegisterLinearGradientShaderFlattenable(); +void SkRegisterRadialGradientShaderFlattenable(); +void SkRegisterSweepGradientShaderFlattenable(); +void SkRegisterTwoPointConicalGradientShaderFlattenable(); + +#endif diff --git a/gfx/skia/skia/src/shaders/gradients/SkLinearGradient.cpp b/gfx/skia/skia/src/shaders/gradients/SkLinearGradient.cpp new file mode 100644 index 0000000000..a7144555fb --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkLinearGradient.cpp @@ -0,0 +1,180 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/shaders/gradients/SkLinearGradient.h" + +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkLocalMatrixShader.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +static SkMatrix pts_to_unit_matrix(const SkPoint pts[2]) { + SkVector vec = pts[1] - pts[0]; + SkScalar mag = vec.length(); + SkScalar inv = mag ? SkScalarInvert(mag) : 0; + + vec.scale(inv); + SkMatrix matrix; + matrix.setSinCos(-vec.fY, vec.fX, pts[0].fX, pts[0].fY); + matrix.postTranslate(-pts[0].fX, -pts[0].fY); + matrix.postScale(inv, inv); + return matrix; +} + +/////////////////////////////////////////////////////////////////////////////// + +SkLinearGradient::SkLinearGradient(const SkPoint pts[2], const Descriptor& desc) + : SkGradientShaderBase(desc, pts_to_unit_matrix(pts)) + , fStart(pts[0]) + , fEnd(pts[1]) { +} + +sk_sp SkLinearGradient::CreateProc(SkReadBuffer& buffer) { + DescriptorScope desc; + SkMatrix legacyLocalMatrix; + if (!desc.unflatten(buffer, &legacyLocalMatrix)) { + return nullptr; + } + SkPoint pts[2]; + pts[0] = buffer.readPoint(); + pts[1] = buffer.readPoint(); + return SkGradientShader::MakeLinear(pts, + desc.fColors, + std::move(desc.fColorSpace), + desc.fPositions, + desc.fColorCount, + desc.fTileMode, + desc.fInterpolation, + &legacyLocalMatrix); +} + +void SkLinearGradient::flatten(SkWriteBuffer& buffer) const { + this->INHERITED::flatten(buffer); + buffer.writePoint(fStart); + buffer.writePoint(fEnd); +} + +void SkLinearGradient::appendGradientStages(SkArenaAlloc*, SkRasterPipeline*, + SkRasterPipeline*) const { + // No extra stage needed for linear gradients. +} + +skvm::F32 SkLinearGradient::transformT(skvm::Builder* p, skvm::Uniforms*, + skvm::Coord coord, skvm::I32* mask) const { + // We've baked getting t in x into the matrix, so this is pretty trivial. + return coord.x; +} + +SkShaderBase::GradientType SkLinearGradient::asGradient(GradientInfo* info, + SkMatrix* localMatrix) const { + if (info) { + commonAsAGradient(info); + info->fPoint[0] = fStart; + info->fPoint[1] = fEnd; + } + if (localMatrix) { + *localMatrix = SkMatrix::I(); + } + return GradientType::kLinear; +} + +///////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +#include "src/gpu/ganesh/gradients/GrGradientShader.h" + +std::unique_ptr SkLinearGradient::asFragmentProcessor( + const GrFPArgs& args, const MatrixRec& mRec) const { + return GrGradientShader::MakeLinear(*this, args, mRec); +} + +#endif + +#if defined(SK_GRAPHITE) +void SkLinearGradient::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SkColor4fXformer xformedColors(this, keyContext.dstColorInfo().colorSpace()); + const SkPMColor4f* colors = xformedColors.fColors.begin(); + + GradientShaderBlocks::GradientData data(GradientType::kLinear, + fStart, fEnd, + 0.0f, 0.0f, + 0.0f, 0.0f, + fTileMode, + fColorCount, + colors, + fPositions, + fInterpolation); + + MakeInterpolatedToDst(keyContext, builder, gatherer, + data, fInterpolation, + xformedColors.fIntermediateColorSpace.get()); +} +#endif + +sk_sp SkGradientShader::MakeLinear(const SkPoint pts[2], + const SkColor4f colors[], + sk_sp colorSpace, + const SkScalar pos[], + int colorCount, + SkTileMode mode, + const Interpolation& interpolation, + const SkMatrix* localMatrix) { + if (!pts || !SkScalarIsFinite((pts[1] - pts[0]).length())) { + return nullptr; + } + if (!SkGradientShaderBase::ValidGradient(colors, colorCount, mode, interpolation)) { + return nullptr; + } + if (1 == colorCount) { + return SkShaders::Color(colors[0], std::move(colorSpace)); + } + if (localMatrix && !localMatrix->invert(nullptr)) { + return nullptr; + } + + if (SkScalarNearlyZero((pts[1] - pts[0]).length(), + SkGradientShaderBase::kDegenerateThreshold)) { + // Degenerate gradient, the only tricky complication is when in clamp mode, the limit of + // the gradient approaches two half planes of solid color (first and last). However, they + // are divided by the line perpendicular to the start and end point, which becomes undefined + // once start and end are exactly the same, so just use the end color for a stable solution. + return SkGradientShaderBase::MakeDegenerateGradient(colors, pos, colorCount, + std::move(colorSpace), mode); + } + + SkGradientShaderBase::ColorStopOptimizer opt(colors, pos, colorCount, mode); + + SkGradientShaderBase::Descriptor desc(opt.fColors, std::move(colorSpace), opt.fPos, + opt.fCount, mode, interpolation); + return SkLocalMatrixShader::MakeWrapped(localMatrix, pts, desc); +} + +sk_sp SkGradientShader::MakeLinear(const SkPoint pts[2], + const SkColor colors[], + const SkScalar pos[], + int colorCount, + SkTileMode mode, + uint32_t flags, + const SkMatrix* localMatrix) { + SkColorConverter converter(colors, colorCount); + return MakeLinear(pts, converter.fColors4f.begin(), nullptr, pos, colorCount, mode, flags, + localMatrix); +} + +void SkRegisterLinearGradientShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkLinearGradient); +} diff --git a/gfx/skia/skia/src/shaders/gradients/SkLinearGradient.h b/gfx/skia/skia/src/shaders/gradients/SkLinearGradient.h new file mode 100644 index 0000000000..48a340ed1c --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkLinearGradient.h @@ -0,0 +1,50 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkLinearGradient_DEFINED +#define SkLinearGradient_DEFINED + +#include "src/shaders/gradients/SkGradientShaderBase.h" + +class SkLinearGradient final : public SkGradientShaderBase { +public: + SkLinearGradient(const SkPoint pts[2], const Descriptor&); + + GradientType asGradient(GradientInfo* info, SkMatrix* localMatrix) const override; +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +protected: + SkLinearGradient(SkReadBuffer& buffer); + void flatten(SkWriteBuffer& buffer) const override; + + void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline, + SkRasterPipeline* postPipeline) const final; + + skvm::F32 transformT(skvm::Builder*, skvm::Uniforms*, + skvm::Coord coord, skvm::I32* mask) const final; + +private: + friend void ::SkRegisterLinearGradientShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkLinearGradient) + + class LinearGradient4fContext; + + friend class SkGradientShader; + using INHERITED = SkGradientShaderBase; + const SkPoint fStart; + const SkPoint fEnd; +}; + +#endif diff --git a/gfx/skia/skia/src/shaders/gradients/SkRadialGradient.cpp b/gfx/skia/skia/src/shaders/gradients/SkRadialGradient.cpp new file mode 100644 index 0000000000..89760ac072 --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkRadialGradient.cpp @@ -0,0 +1,218 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkLocalMatrixShader.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +#include "src/shaders/gradients/SkGradientShaderBase.h" + +namespace { + +SkMatrix rad_to_unit_matrix(const SkPoint& center, SkScalar radius) { + SkScalar inv = SkScalarInvert(radius); + + SkMatrix matrix; + matrix.setTranslate(-center.fX, -center.fY); + matrix.postScale(inv, inv); + return matrix; +} + +} // namespace + +///////////////////////////////////////////////////////////////////// +class SkRadialGradient final : public SkGradientShaderBase { +public: + SkRadialGradient(const SkPoint& center, SkScalar radius, const Descriptor&); + + GradientType asGradient(GradientInfo* info, SkMatrix* matrix) const override; +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif +protected: + SkRadialGradient(SkReadBuffer& buffer); + void flatten(SkWriteBuffer& buffer) const override; + + void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline, + SkRasterPipeline* postPipeline) const override; + + skvm::F32 transformT(skvm::Builder*, skvm::Uniforms*, + skvm::Coord coord, skvm::I32* mask) const final; + +private: + friend void ::SkRegisterRadialGradientShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkRadialGradient) + + const SkPoint fCenter; + const SkScalar fRadius; +}; + +SkRadialGradient::SkRadialGradient(const SkPoint& center, SkScalar radius, const Descriptor& desc) + : SkGradientShaderBase(desc, rad_to_unit_matrix(center, radius)) + , fCenter(center) + , fRadius(radius) { +} + +SkShaderBase::GradientType SkRadialGradient::asGradient(GradientInfo* info, + SkMatrix* localMatrix) const { + if (info) { + commonAsAGradient(info); + info->fPoint[0] = fCenter; + info->fRadius[0] = fRadius; + } + if (localMatrix) { + *localMatrix = SkMatrix::I(); + } + return GradientType::kRadial; +} + +sk_sp SkRadialGradient::CreateProc(SkReadBuffer& buffer) { + DescriptorScope desc; + SkMatrix legacyLocalMatrix; + if (!desc.unflatten(buffer, &legacyLocalMatrix)) { + return nullptr; + } + const SkPoint center = buffer.readPoint(); + const SkScalar radius = buffer.readScalar(); + return SkGradientShader::MakeRadial(center, + radius, + desc.fColors, + std::move(desc.fColorSpace), + desc.fPositions, + desc.fColorCount, + desc.fTileMode, + desc.fInterpolation, + &legacyLocalMatrix); +} + +void SkRadialGradient::flatten(SkWriteBuffer& buffer) const { + this->SkGradientShaderBase::flatten(buffer); + buffer.writePoint(fCenter); + buffer.writeScalar(fRadius); +} + +void SkRadialGradient::appendGradientStages(SkArenaAlloc*, SkRasterPipeline* p, + SkRasterPipeline*) const { + p->append(SkRasterPipelineOp::xy_to_radius); +} + +skvm::F32 SkRadialGradient::transformT(skvm::Builder* p, skvm::Uniforms*, + skvm::Coord coord, skvm::I32* mask) const { + return sqrt(coord.x*coord.x + coord.y*coord.y); +} + +///////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/gpu/ganesh/gradients/GrGradientShader.h" + +std::unique_ptr +SkRadialGradient::asFragmentProcessor(const GrFPArgs& args, const MatrixRec& mRec) const { + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "half4 main(float2 coord) {" + "return half4(half(length(coord)), 1, 0, 0);" // y = 1 for always valid + "}" + ); + // The radial gradient never rejects a pixel so it doesn't change opacity + auto fp = GrSkSLFP::Make(effect, "RadialLayout", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kPreservesOpaqueInput); + return GrGradientShader::MakeGradientFP(*this, args, mRec, std::move(fp)); +} + +#endif + +#if defined(SK_GRAPHITE) +void SkRadialGradient::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SkColor4fXformer xformedColors(this, keyContext.dstColorInfo().colorSpace()); + const SkPMColor4f* colors = xformedColors.fColors.begin(); + + GradientShaderBlocks::GradientData data(GradientType::kRadial, + fCenter, { 0.0f, 0.0f }, + fRadius, 0.0f, + 0.0f, 0.0f, + fTileMode, + fColorCount, + colors, + fPositions, + fInterpolation); + + MakeInterpolatedToDst(keyContext, builder, gatherer, + data, + fInterpolation, + xformedColors.fIntermediateColorSpace.get()); +} +#endif + +sk_sp SkGradientShader::MakeRadial(const SkPoint& center, SkScalar radius, + const SkColor4f colors[], + sk_sp colorSpace, + const SkScalar pos[], + int colorCount, + SkTileMode mode, + const Interpolation& interpolation, + const SkMatrix* localMatrix) { + if (radius < 0) { + return nullptr; + } + if (!SkGradientShaderBase::ValidGradient(colors, colorCount, mode, interpolation)) { + return nullptr; + } + if (1 == colorCount) { + return SkShaders::Color(colors[0], std::move(colorSpace)); + } + if (localMatrix && !localMatrix->invert(nullptr)) { + return nullptr; + } + + if (SkScalarNearlyZero(radius, SkGradientShaderBase::kDegenerateThreshold)) { + // Degenerate gradient optimization, and no special logic needed for clamped radial gradient + return SkGradientShaderBase::MakeDegenerateGradient(colors, pos, colorCount, + std::move(colorSpace), mode); + } + + SkGradientShaderBase::ColorStopOptimizer opt(colors, pos, colorCount, mode); + + SkGradientShaderBase::Descriptor desc(opt.fColors, std::move(colorSpace), opt.fPos, + opt.fCount, mode, interpolation); + return SkLocalMatrixShader::MakeWrapped(localMatrix, center, radius, desc); +} + +sk_sp SkGradientShader::MakeRadial(const SkPoint& center, SkScalar radius, + const SkColor colors[], + const SkScalar pos[], + int colorCount, + SkTileMode mode, + uint32_t flags, + const SkMatrix* localMatrix) { + SkColorConverter converter(colors, colorCount); + return MakeRadial(center, radius, converter.fColors4f.begin(), nullptr, pos, colorCount, mode, + flags, localMatrix); +} + +void SkRegisterRadialGradientShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkRadialGradient); +} diff --git a/gfx/skia/skia/src/shaders/gradients/SkSweepGradient.cpp b/gfx/skia/skia/src/shaders/gradients/SkSweepGradient.cpp new file mode 100644 index 0000000000..f45be27844 --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkSweepGradient.cpp @@ -0,0 +1,294 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkFloatingPoint.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkLocalMatrixShader.h" + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +#include "src/shaders/gradients/SkGradientShaderBase.h" + +class SkSweepGradient final : public SkGradientShaderBase { +public: + SkSweepGradient(const SkPoint& center, SkScalar t0, SkScalar t1, const Descriptor&); + + GradientType asGradient(GradientInfo* info, SkMatrix* localMatrix) const override; + +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + +protected: + void flatten(SkWriteBuffer& buffer) const override; + + void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline, + SkRasterPipeline* postPipeline) const override; + + skvm::F32 transformT(skvm::Builder*, skvm::Uniforms*, + skvm::Coord coord, skvm::I32* mask) const final; +private: + friend void ::SkRegisterSweepGradientShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkSweepGradient) + + const SkPoint fCenter; + const SkScalar fTBias; + const SkScalar fTScale; +}; + +SkSweepGradient::SkSweepGradient(const SkPoint& center, SkScalar t0, SkScalar t1, + const Descriptor& desc) + : SkGradientShaderBase(desc, SkMatrix::Translate(-center.x(), -center.y())) + , fCenter(center) + , fTBias(-t0) + , fTScale(1 / (t1 - t0)) +{ + SkASSERT(t0 < t1); +} + +SkShaderBase::GradientType SkSweepGradient::asGradient(GradientInfo* info, + SkMatrix* localMatrix) const { + if (info) { + commonAsAGradient(info); + info->fPoint[0] = fCenter; + } + if (localMatrix) { + *localMatrix = SkMatrix::I(); + } + return GradientType::kSweep; +} + +static std::tuple angles_from_t_coeff(SkScalar tBias, SkScalar tScale) { + return std::make_tuple(-tBias * 360, (sk_ieee_float_divide(1, tScale) - tBias) * 360); +} + +sk_sp SkSweepGradient::CreateProc(SkReadBuffer& buffer) { + DescriptorScope desc; + SkMatrix legacyLocalMatrix; + if (!desc.unflatten(buffer, &legacyLocalMatrix)) { + return nullptr; + } + const SkPoint center = buffer.readPoint(); + + const auto tBias = buffer.readScalar(), + tScale = buffer.readScalar(); + auto [startAngle, endAngle] = angles_from_t_coeff(tBias, tScale); + + return SkGradientShader::MakeSweep(center.x(), center.y(), + desc.fColors, + std::move(desc.fColorSpace), + desc.fPositions, + desc.fColorCount, + desc.fTileMode, + startAngle, + endAngle, + desc.fInterpolation, + &legacyLocalMatrix); +} + +void SkSweepGradient::flatten(SkWriteBuffer& buffer) const { + this->SkGradientShaderBase::flatten(buffer); + buffer.writePoint(fCenter); + buffer.writeScalar(fTBias); + buffer.writeScalar(fTScale); +} + +void SkSweepGradient::appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* p, + SkRasterPipeline*) const { + p->append(SkRasterPipelineOp::xy_to_unit_angle); + p->append_matrix(alloc, SkMatrix::Scale(fTScale, 1) * SkMatrix::Translate(fTBias, 0)); +} + +skvm::F32 SkSweepGradient::transformT(skvm::Builder* p, skvm::Uniforms* uniforms, + skvm::Coord coord, skvm::I32* mask) const { + skvm::F32 xabs = abs(coord.x), + yabs = abs(coord.y), + slope = min(xabs, yabs) / max(xabs, yabs); + skvm::F32 s = slope * slope; + + // Use a 7th degree polynomial to approximate atan. + // This was generated using sollya.gforge.inria.fr. + // A float optimized polynomial was generated using the following command. + // P1 = fpminimax((1/(2*Pi))*atan(x),[|1,3,5,7|],[|24...|],[2^(-40),1],relative); + skvm::F32 phi = slope * poly(s, -7.0547382347285747528076171875e-3f, + +2.476101927459239959716796875e-2f, + -5.185396969318389892578125e-2f, + +0.15912117063999176025390625f); + phi = select( xabs < yabs, (1/4.0f) - phi, phi); + phi = select(coord.x < 0.0f, (1/2.0f) - phi, phi); + phi = select(coord.y < 0.0f, (1/1.0f) - phi, phi); + + skvm::F32 t = select(is_NaN(phi), p->splat(0.0f) + , phi); + + if (fTScale != 1.0f || fTBias != 0.0f) { + t = t * p->uniformF(uniforms->pushF(fTScale)) + + p->uniformF(uniforms->pushF(fTScale*fTBias)); + } + return t; +} + +///////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/gpu/ganesh/GrCaps.h" +#include "src/gpu/ganesh/GrRecordingContextPriv.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/gpu/ganesh/gradients/GrGradientShader.h" + +std::unique_ptr SkSweepGradient::asFragmentProcessor( + const GrFPArgs& args, const MatrixRec& mRec) const { + // On some devices they incorrectly implement atan2(y,x) as atan(y/x). In actuality it is + // atan2(y,x) = 2 * atan(y / (sqrt(x^2 + y^2) + x)). So to work around this we pass in (sqrt(x^2 + // + y^2) + x) as the second parameter to atan2 in these cases. We let the device handle the + // undefined behavior of the second paramenter being 0 instead of doing the divide ourselves and + // using atan instead. + int useAtanWorkaround = + args.fContext->priv().caps()->shaderCaps()->fAtan2ImplementedAsAtanYOverX; + static const SkRuntimeEffect* effect = SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform half bias;" + "uniform half scale;" + "uniform int useAtanWorkaround;" // specialized + + "half4 main(float2 coord) {" + "half angle = bool(useAtanWorkaround)" + "? half(2 * atan(-coord.y, length(coord) - coord.x))" + ": half(atan(-coord.y, -coord.x));" + + // 0.1591549430918 is 1/(2*pi), used since atan returns values [-pi, pi] + "half t = (angle * 0.1591549430918 + 0.5 + bias) * scale;" + "return half4(t, 1, 0, 0);" // y = 1 for always valid + "}" + ); + + // The sweep gradient never rejects a pixel so it doesn't change opacity + auto fp = GrSkSLFP::Make(effect, "SweepLayout", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kPreservesOpaqueInput, + "bias", fTBias, + "scale", fTScale, + "useAtanWorkaround", GrSkSLFP::Specialize(useAtanWorkaround)); + return GrGradientShader::MakeGradientFP(*this, args, mRec, std::move(fp)); +} + +#endif + +#if defined(SK_GRAPHITE) +void SkSweepGradient::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SkColor4fXformer xformedColors(this, keyContext.dstColorInfo().colorSpace()); + const SkPMColor4f* colors = xformedColors.fColors.begin(); + + GradientShaderBlocks::GradientData data(SkShaderBase::GradientType::kSweep, + fCenter, { 0.0f, 0.0f }, + 0.0, 0.0f, + fTBias, fTScale, + fTileMode, + fColorCount, + colors, + fPositions, + fInterpolation); + + MakeInterpolatedToDst(keyContext, builder, gatherer, + data, fInterpolation, + xformedColors.fIntermediateColorSpace.get()); + +} +#endif + +sk_sp SkGradientShader::MakeSweep(SkScalar cx, SkScalar cy, + const SkColor4f colors[], + sk_sp colorSpace, + const SkScalar pos[], + int colorCount, + SkTileMode mode, + SkScalar startAngle, + SkScalar endAngle, + const Interpolation& interpolation, + const SkMatrix* localMatrix) { + if (!SkGradientShaderBase::ValidGradient(colors, colorCount, mode, interpolation)) { + return nullptr; + } + if (1 == colorCount) { + return SkShaders::Color(colors[0], std::move(colorSpace)); + } + if (!SkScalarIsFinite(startAngle) || !SkScalarIsFinite(endAngle) || startAngle > endAngle) { + return nullptr; + } + if (localMatrix && !localMatrix->invert(nullptr)) { + return nullptr; + } + + if (SkScalarNearlyEqual(startAngle, endAngle, SkGradientShaderBase::kDegenerateThreshold)) { + // Degenerate gradient, which should follow default degenerate behavior unless it is + // clamped and the angle is greater than 0. + if (mode == SkTileMode::kClamp && endAngle > SkGradientShaderBase::kDegenerateThreshold) { + // In this case, the first color is repeated from 0 to the angle, then a hardstop + // switches to the last color (all other colors are compressed to the infinitely thin + // interpolation region). + static constexpr SkScalar clampPos[3] = {0, 1, 1}; + SkColor4f reColors[3] = {colors[0], colors[0], colors[colorCount - 1]}; + return MakeSweep(cx, cy, reColors, std::move(colorSpace), clampPos, 3, mode, 0, + endAngle, interpolation, localMatrix); + } else { + return SkGradientShaderBase::MakeDegenerateGradient(colors, pos, colorCount, + std::move(colorSpace), mode); + } + } + + if (startAngle <= 0 && endAngle >= 360) { + // If the t-range includes [0,1], then we can always use clamping (presumably faster). + mode = SkTileMode::kClamp; + } + + SkGradientShaderBase::ColorStopOptimizer opt(colors, pos, colorCount, mode); + + SkGradientShaderBase::Descriptor desc(opt.fColors, std::move(colorSpace), opt.fPos, + opt.fCount, mode, interpolation); + + const SkScalar t0 = startAngle / 360, + t1 = endAngle / 360; + + return SkLocalMatrixShader::MakeWrapped(localMatrix, + SkPoint::Make(cx, cy), + t0, t1, + desc); +} + +sk_sp SkGradientShader::MakeSweep(SkScalar cx, SkScalar cy, + const SkColor colors[], + const SkScalar pos[], + int colorCount, + SkTileMode mode, + SkScalar startAngle, + SkScalar endAngle, + uint32_t flags, + const SkMatrix* localMatrix) { + SkColorConverter converter(colors, colorCount); + return MakeSweep(cx, cy, converter.fColors4f.begin(), nullptr, pos, colorCount, + mode, startAngle, endAngle, flags, localMatrix); +} + +void SkRegisterSweepGradientShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkSweepGradient); +} diff --git a/gfx/skia/skia/src/shaders/gradients/SkTwoPointConicalGradient.cpp b/gfx/skia/skia/src/shaders/gradients/SkTwoPointConicalGradient.cpp new file mode 100644 index 0000000000..4b578194e6 --- /dev/null +++ b/gfx/skia/skia/src/shaders/gradients/SkTwoPointConicalGradient.cpp @@ -0,0 +1,657 @@ +/* + * Copyright 2012 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/base/SkFloatingPoint.h" +#include "src/core/SkRasterPipeline.h" +#include "src/core/SkReadBuffer.h" +#include "src/core/SkWriteBuffer.h" +#include "src/shaders/SkLocalMatrixShader.h" +#include "src/shaders/gradients/SkGradientShaderBase.h" + +#include + +#if defined(SK_GRAPHITE) +#include "src/gpu/graphite/KeyContext.h" +#include "src/gpu/graphite/KeyHelpers.h" +#include "src/gpu/graphite/PaintParamsKey.h" +#endif + +// Please see https://skia.org/dev/design/conical for how our shader works. + +class SkTwoPointConicalGradient final : public SkGradientShaderBase { +public: + // See https://skia.org/dev/design/conical for what focal data means and how our shader works. + // We make it public so the GPU shader can also use it. + struct FocalData { + SkScalar fR1; // r1 after mapping focal point to (0, 0) + SkScalar fFocalX; // f + bool fIsSwapped; // whether we swapped r0, r1 + + // The input r0, r1 are the radii when we map centers to {(0, 0), (1, 0)}. + // We'll post concat matrix with our transformation matrix that maps focal point to (0, 0). + // Returns true if the set succeeded + bool set(SkScalar r0, SkScalar r1, SkMatrix* matrix); + + // Whether the focal point (0, 0) is on the end circle with center (1, 0) and radius r1. If + // this is true, it's as if an aircraft is flying at Mach 1 and all circles (soundwaves) + // will go through the focal point (aircraft). In our previous implementations, this was + // known as the edge case where the inside circle touches the outside circle (on the focal + // point). If we were to solve for t bruteforcely using a quadratic equation, this case + // implies that the quadratic equation degenerates to a linear equation. + bool isFocalOnCircle() const { return SkScalarNearlyZero(1 - fR1); } + + bool isSwapped() const { return fIsSwapped; } + bool isWellBehaved() const { return !this->isFocalOnCircle() && fR1 > 1; } + bool isNativelyFocal() const { return SkScalarNearlyZero(fFocalX); } + }; + + enum class Type { + kRadial, + kStrip, + kFocal + }; + + static sk_sp Create(const SkPoint& start, SkScalar startRadius, + const SkPoint& end, SkScalar endRadius, + const Descriptor&, const SkMatrix* localMatrix); + + GradientType asGradient(GradientInfo* info, SkMatrix* localMatrix) const override; +#if defined(SK_GANESH) + std::unique_ptr asFragmentProcessor(const GrFPArgs&, + const MatrixRec&) const override; +#endif +#if defined(SK_GRAPHITE) + void addToKey(const skgpu::graphite::KeyContext&, + skgpu::graphite::PaintParamsKeyBuilder*, + skgpu::graphite::PipelineDataGatherer*) const override; +#endif + bool isOpaque() const override; + + SkScalar getCenterX1() const { return SkPoint::Distance(fCenter1, fCenter2); } + SkScalar getStartRadius() const { return fRadius1; } + SkScalar getDiffRadius() const { return fRadius2 - fRadius1; } + const SkPoint& getStartCenter() const { return fCenter1; } + const SkPoint& getEndCenter() const { return fCenter2; } + SkScalar getEndRadius() const { return fRadius2; } + + Type getType() const { return fType; } + const FocalData& getFocalData() const { return fFocalData; } + + SkTwoPointConicalGradient(const SkPoint& c0, SkScalar r0, + const SkPoint& c1, SkScalar r1, + const Descriptor&, Type, const SkMatrix&, const FocalData&); + +protected: + void flatten(SkWriteBuffer& buffer) const override; + + void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline, + SkRasterPipeline* postPipeline) const override; + + skvm::F32 transformT(skvm::Builder*, skvm::Uniforms*, + skvm::Coord coord, skvm::I32* mask) const final; + +private: + friend void ::SkRegisterTwoPointConicalGradientShaderFlattenable(); + SK_FLATTENABLE_HOOKS(SkTwoPointConicalGradient) + + SkPoint fCenter1; + SkPoint fCenter2; + SkScalar fRadius1; + SkScalar fRadius2; + Type fType; + + FocalData fFocalData; +}; + +bool SkTwoPointConicalGradient::FocalData::set(SkScalar r0, SkScalar r1, SkMatrix* matrix) { + fIsSwapped = false; + fFocalX = sk_ieee_float_divide(r0, (r0 - r1)); + if (SkScalarNearlyZero(fFocalX - 1)) { + // swap r0, r1 + matrix->postTranslate(-1, 0); + matrix->postScale(-1, 1); + std::swap(r0, r1); + fFocalX = 0; // because r0 is now 0 + fIsSwapped = true; + } + + // Map {focal point, (1, 0)} to {(0, 0), (1, 0)} + const SkPoint from[2] = { {fFocalX, 0}, {1, 0} }; + const SkPoint to[2] = { {0, 0}, {1, 0} }; + SkMatrix focalMatrix; + if (!focalMatrix.setPolyToPoly(from, to, 2)) { + return false; + } + matrix->postConcat(focalMatrix); + fR1 = r1 / SkScalarAbs(1 - fFocalX); // focalMatrix has a scale of 1/(1-f) + + // The following transformations are just to accelerate the shader computation by saving + // some arithmatic operations. + if (this->isFocalOnCircle()) { + matrix->postScale(0.5, 0.5); + } else { + matrix->postScale(fR1 / (fR1 * fR1 - 1), 1 / sqrt(SkScalarAbs(fR1 * fR1 - 1))); + } + matrix->postScale(SkScalarAbs(1 - fFocalX), SkScalarAbs(1 - fFocalX)); // scale |1 - f| + return true; +} + +sk_sp SkTwoPointConicalGradient::Create(const SkPoint& c0, SkScalar r0, + const SkPoint& c1, SkScalar r1, + const Descriptor& desc, + const SkMatrix* localMatrix) { + SkMatrix gradientMatrix; + Type gradientType; + + if (SkScalarNearlyZero((c0 - c1).length())) { + if (SkScalarNearlyZero(std::max(r0, r1)) || SkScalarNearlyEqual(r0, r1)) { + // Degenerate case; avoid dividing by zero. Should have been caught by caller but + // just in case, recheck here. + return nullptr; + } + // Concentric case: we can pretend we're radial (with a tiny twist). + const SkScalar scale = sk_ieee_float_divide(1, std::max(r0, r1)); + gradientMatrix = SkMatrix::Translate(-c1.x(), -c1.y()); + gradientMatrix.postScale(scale, scale); + + gradientType = Type::kRadial; + } else { + const SkPoint centers[2] = { c0 , c1 }; + const SkPoint unitvec[2] = { {0, 0}, {1, 0} }; + + if (!gradientMatrix.setPolyToPoly(centers, unitvec, 2)) { + // Degenerate case. + return nullptr; + } + + gradientType = SkScalarNearlyZero(r1 - r0) ? Type::kStrip : Type::kFocal; + } + + FocalData focalData; + if (gradientType == Type::kFocal) { + const auto dCenter = (c0 - c1).length(); + if (!focalData.set(r0 / dCenter, r1 / dCenter, &gradientMatrix)) { + return nullptr; + } + } + return SkLocalMatrixShader::MakeWrapped(localMatrix, + c0, r0, + c1, r1, + desc, + gradientType, + gradientMatrix, + focalData); +} + +SkTwoPointConicalGradient::SkTwoPointConicalGradient( + const SkPoint& start, SkScalar startRadius, + const SkPoint& end, SkScalar endRadius, + const Descriptor& desc, Type type, const SkMatrix& gradientMatrix, const FocalData& data) + : SkGradientShaderBase(desc, gradientMatrix) + , fCenter1(start) + , fCenter2(end) + , fRadius1(startRadius) + , fRadius2(endRadius) + , fType(type) +{ + // this is degenerate, and should be caught by our caller + SkASSERT(fCenter1 != fCenter2 || fRadius1 != fRadius2); + if (type == Type::kFocal) { + fFocalData = data; + } +} + +bool SkTwoPointConicalGradient::isOpaque() const { + // Because areas outside the cone are left untouched, we cannot treat the + // shader as opaque even if the gradient itself is opaque. + // TODO(junov): Compute whether the cone fills the plane crbug.com/222380 + return false; +} + +// Returns the original non-sorted version of the gradient +SkShaderBase::GradientType SkTwoPointConicalGradient::asGradient(GradientInfo* info, + SkMatrix* localMatrix) const { + if (info) { + commonAsAGradient(info); + info->fPoint[0] = fCenter1; + info->fPoint[1] = fCenter2; + info->fRadius[0] = fRadius1; + info->fRadius[1] = fRadius2; + } + if (localMatrix) { + *localMatrix = SkMatrix::I(); + } + return GradientType::kConical; +} + +sk_sp SkTwoPointConicalGradient::CreateProc(SkReadBuffer& buffer) { + DescriptorScope desc; + SkMatrix legacyLocalMatrix; + if (!desc.unflatten(buffer, &legacyLocalMatrix)) { + return nullptr; + } + SkPoint c1 = buffer.readPoint(); + SkPoint c2 = buffer.readPoint(); + SkScalar r1 = buffer.readScalar(); + SkScalar r2 = buffer.readScalar(); + + if (!buffer.isValid()) { + return nullptr; + } + return SkGradientShader::MakeTwoPointConical(c1, r1, + c2, r2, + desc.fColors, + std::move(desc.fColorSpace), + desc.fPositions, + desc.fColorCount, + desc.fTileMode, + desc.fInterpolation, + &legacyLocalMatrix); +} + +void SkTwoPointConicalGradient::flatten(SkWriteBuffer& buffer) const { + this->SkGradientShaderBase::flatten(buffer); + buffer.writePoint(fCenter1); + buffer.writePoint(fCenter2); + buffer.writeScalar(fRadius1); + buffer.writeScalar(fRadius2); +} + +void SkTwoPointConicalGradient::appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* p, + SkRasterPipeline* postPipeline) const { + const auto dRadius = fRadius2 - fRadius1; + + if (fType == Type::kRadial) { + p->append(SkRasterPipelineOp::xy_to_radius); + + // Tiny twist: radial computes a t for [0, r2], but we want a t for [r1, r2]. + auto scale = std::max(fRadius1, fRadius2) / dRadius; + auto bias = -fRadius1 / dRadius; + + p->append_matrix(alloc, SkMatrix::Translate(bias, 0) * SkMatrix::Scale(scale, 1)); + return; + } + + if (fType == Type::kStrip) { + auto* ctx = alloc->make(); + SkScalar scaledR0 = fRadius1 / this->getCenterX1(); + ctx->fP0 = scaledR0 * scaledR0; + p->append(SkRasterPipelineOp::xy_to_2pt_conical_strip, ctx); + p->append(SkRasterPipelineOp::mask_2pt_conical_nan, ctx); + postPipeline->append(SkRasterPipelineOp::apply_vector_mask, &ctx->fMask); + return; + } + + auto* ctx = alloc->make(); + ctx->fP0 = 1/fFocalData.fR1; + ctx->fP1 = fFocalData.fFocalX; + + if (fFocalData.isFocalOnCircle()) { + p->append(SkRasterPipelineOp::xy_to_2pt_conical_focal_on_circle); + } else if (fFocalData.isWellBehaved()) { + p->append(SkRasterPipelineOp::xy_to_2pt_conical_well_behaved, ctx); + } else if (fFocalData.isSwapped() || 1 - fFocalData.fFocalX < 0) { + p->append(SkRasterPipelineOp::xy_to_2pt_conical_smaller, ctx); + } else { + p->append(SkRasterPipelineOp::xy_to_2pt_conical_greater, ctx); + } + + if (!fFocalData.isWellBehaved()) { + p->append(SkRasterPipelineOp::mask_2pt_conical_degenerates, ctx); + } + if (1 - fFocalData.fFocalX < 0) { + p->append(SkRasterPipelineOp::negate_x); + } + if (!fFocalData.isNativelyFocal()) { + p->append(SkRasterPipelineOp::alter_2pt_conical_compensate_focal, ctx); + } + if (fFocalData.isSwapped()) { + p->append(SkRasterPipelineOp::alter_2pt_conical_unswap); + } + if (!fFocalData.isWellBehaved()) { + postPipeline->append(SkRasterPipelineOp::apply_vector_mask, &ctx->fMask); + } +} + +skvm::F32 SkTwoPointConicalGradient::transformT(skvm::Builder* p, skvm::Uniforms* uniforms, + skvm::Coord coord, skvm::I32* mask) const { + auto mag = [](skvm::F32 x, skvm::F32 y) { return sqrt(x*x + y*y); }; + + // See https://skia.org/dev/design/conical, and appendStages() above. + // There's a lot going on here, and I'm not really sure what's independent + // or disjoint, what can be reordered, simplified, etc. Tweak carefully. + + const skvm::F32 x = coord.x, + y = coord.y; + if (fType == Type::kRadial) { + float denom = 1.0f / (fRadius2 - fRadius1), + scale = std::max(fRadius1, fRadius2) * denom, + bias = -fRadius1 * denom; + return mag(x,y) * p->uniformF(uniforms->pushF(scale)) + + p->uniformF(uniforms->pushF(bias )); + } + + if (fType == Type::kStrip) { + float r = fRadius1 / this->getCenterX1(); + skvm::F32 t = x + sqrt(p->uniformF(uniforms->pushF(r*r)) - y*y); + + *mask = (t == t); // t != NaN + return t; + } + + const skvm::F32 invR1 = p->uniformF(uniforms->pushF(1 / fFocalData.fR1)); + + skvm::F32 t; + if (fFocalData.isFocalOnCircle()) { + t = (y/x) * y + x; // (x^2 + y^2) / x ~~> x + y^2/x ~~> y/x * y + x + } else if (fFocalData.isWellBehaved()) { + t = mag(x,y) - x*invR1; + } else { + skvm::F32 k = sqrt(x*x - y*y); + if (fFocalData.isSwapped() || 1 - fFocalData.fFocalX < 0) { + k = -k; + } + t = k - x*invR1; + } + + if (!fFocalData.isWellBehaved()) { + // TODO: not sure why we consider t == 0 degenerate + *mask = (t > 0.0f); // and implicitly, t != NaN + } + + const skvm::F32 focalX = p->uniformF(uniforms->pushF(fFocalData.fFocalX)); + if (1 - fFocalData.fFocalX < 0) { t = -t; } + if (!fFocalData.isNativelyFocal()) { t += focalX; } + if ( fFocalData.isSwapped()) { t = 1.0f - t; } + return t; +} + +///////////////////////////////////////////////////////////////////// + +#if defined(SK_GANESH) + +#include "src/core/SkRuntimeEffectPriv.h" +#include "src/gpu/ganesh/effects/GrSkSLFP.h" +#include "src/gpu/ganesh/gradients/GrGradientShader.h" + +std::unique_ptr +SkTwoPointConicalGradient::asFragmentProcessor(const GrFPArgs& args, const MatrixRec& mRec) const { + // The 2 point conical gradient can reject a pixel so it does change opacity even if the input + // was opaque. Thus, all of these layout FPs disable that optimization. + std::unique_ptr fp; + SkTLazy matrix; + switch (this->getType()) { + case SkTwoPointConicalGradient::Type::kStrip: { + static const SkRuntimeEffect* kEffect = + SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform half r0_2;" + "half4 main(float2 p) {" + "half v = 1;" // validation flag,set to negative to discard fragment later + "float t = r0_2 - p.y * p.y;" + "if (t >= 0) {" + "t = p.x + sqrt(t);" + "} else {" + "v = -1;" + "}" + "return half4(half(t), v, 0, 0);" + "}" + ); + float r0 = this->getStartRadius() / this->getCenterX1(); + fp = GrSkSLFP::Make(kEffect, "TwoPointConicalStripLayout", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kNone, + "r0_2", r0 * r0); + } break; + + case SkTwoPointConicalGradient::Type::kRadial: { + static const SkRuntimeEffect* kEffect = + SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + "uniform half r0;" + "uniform half lengthScale;" + "half4 main(float2 p) {" + "half v = 1;" // validation flag,set to negative to discard fragment later + "float t = length(p) * lengthScale - r0;" + "return half4(half(t), v, 0, 0);" + "}" + ); + float dr = this->getDiffRadius(); + float r0 = this->getStartRadius() / dr; + bool isRadiusIncreasing = dr >= 0; + fp = GrSkSLFP::Make(kEffect, "TwoPointConicalRadialLayout", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kNone, + "r0", r0, + "lengthScale", isRadiusIncreasing ? 1.0f : -1.0f); + + // GPU radial matrix is different from the original matrix, since we map the diff radius + // to have |dr| = 1, so manually compute the final gradient matrix here. + + // Map center to (0, 0) + matrix.set(SkMatrix::Translate(-this->getStartCenter().fX, + -this->getStartCenter().fY)); + // scale |diffRadius| to 1 + matrix->postScale(1 / dr, 1 / dr); + } break; + + case SkTwoPointConicalGradient::Type::kFocal: { + static const SkRuntimeEffect* kEffect = + SkMakeRuntimeEffect(SkRuntimeEffect::MakeForShader, + // Optimization flags, all specialized: + "uniform int isRadiusIncreasing;" + "uniform int isFocalOnCircle;" + "uniform int isWellBehaved;" + "uniform int isSwapped;" + "uniform int isNativelyFocal;" + + "uniform half invR1;" // 1/r1 + "uniform half fx;" // focalX = r0/(r0-r1) + + "half4 main(float2 p) {" + "float t = -1;" + "half v = 1;" // validation flag,set to negative to discard fragment later + + "float x_t = -1;" + "if (bool(isFocalOnCircle)) {" + "x_t = dot(p, p) / p.x;" + "} else if (bool(isWellBehaved)) {" + "x_t = length(p) - p.x * invR1;" + "} else {" + "float temp = p.x * p.x - p.y * p.y;" + + // Only do sqrt if temp >= 0; this is significantly slower than + // checking temp >= 0 in the if statement that checks r(t) >= 0. + // But GPU may break if we sqrt a negative float. (Although I + // haven't observed that on any devices so far, and the old + // approach also does sqrt negative value without a check.) If + // the performance is really critical, maybe we should just + // compute the area where temp and x_t are always valid and drop + // all these ifs. + "if (temp >= 0) {" + "if (bool(isSwapped) || !bool(isRadiusIncreasing)) {" + "x_t = -sqrt(temp) - p.x * invR1;" + "} else {" + "x_t = sqrt(temp) - p.x * invR1;" + "}" + "}" + "}" + + // The final calculation of t from x_t has lots of static + // optimizations but only do them when x_t is positive (which + // can be assumed true if isWellBehaved is true) + "if (!bool(isWellBehaved)) {" + // This will still calculate t even though it will be ignored + // later in the pipeline to avoid a branch + "if (x_t <= 0.0) {" + "v = -1;" + "}" + "}" + "if (bool(isRadiusIncreasing)) {" + "if (bool(isNativelyFocal)) {" + "t = x_t;" + "} else {" + "t = x_t + fx;" + "}" + "} else {" + "if (bool(isNativelyFocal)) {" + "t = -x_t;" + "} else {" + "t = -x_t + fx;" + "}" + "}" + + "if (bool(isSwapped)) {" + "t = 1 - t;" + "}" + + "return half4(half(t), v, 0, 0);" + "}" + ); + + const SkTwoPointConicalGradient::FocalData& focalData = this->getFocalData(); + bool isRadiusIncreasing = (1 - focalData.fFocalX) > 0, + isFocalOnCircle = focalData.isFocalOnCircle(), + isWellBehaved = focalData.isWellBehaved(), + isSwapped = focalData.isSwapped(), + isNativelyFocal = focalData.isNativelyFocal(); + + fp = GrSkSLFP::Make(kEffect, "TwoPointConicalFocalLayout", /*inputFP=*/nullptr, + GrSkSLFP::OptFlags::kNone, + "isRadiusIncreasing", GrSkSLFP::Specialize(isRadiusIncreasing), + "isFocalOnCircle", GrSkSLFP::Specialize(isFocalOnCircle), + "isWellBehaved", GrSkSLFP::Specialize(isWellBehaved), + "isSwapped", GrSkSLFP::Specialize(isSwapped), + "isNativelyFocal", GrSkSLFP::Specialize(isNativelyFocal), + "invR1", 1.0f / focalData.fR1, + "fx", focalData.fFocalX); + } break; + } + return GrGradientShader::MakeGradientFP(*this, + args, + mRec, + std::move(fp), + matrix.getMaybeNull()); +} + +#endif + +#if defined(SK_GRAPHITE) +void SkTwoPointConicalGradient::addToKey(const skgpu::graphite::KeyContext& keyContext, + skgpu::graphite::PaintParamsKeyBuilder* builder, + skgpu::graphite::PipelineDataGatherer* gatherer) const { + using namespace skgpu::graphite; + + SkColor4fXformer xformedColors(this, keyContext.dstColorInfo().colorSpace()); + const SkPMColor4f* colors = xformedColors.fColors.begin(); + + GradientShaderBlocks::GradientData data(GradientType::kConical, + fCenter1, fCenter2, + fRadius1, fRadius2, + 0.0f, 0.0f, + fTileMode, + fColorCount, + colors, + fPositions, + fInterpolation); + + MakeInterpolatedToDst(keyContext, builder, gatherer, + data, fInterpolation, + xformedColors.fIntermediateColorSpace.get()); +} +#endif + +// assumes colors is SkColor4f* and pos is SkScalar* +#define EXPAND_1_COLOR(count) \ + SkColor4f tmp[2]; \ + do { \ + if (1 == count) { \ + tmp[0] = tmp[1] = colors[0]; \ + colors = tmp; \ + pos = nullptr; \ + count = 2; \ + } \ + } while (0) + +sk_sp SkGradientShader::MakeTwoPointConical(const SkPoint& start, + SkScalar startRadius, + const SkPoint& end, + SkScalar endRadius, + const SkColor4f colors[], + sk_sp colorSpace, + const SkScalar pos[], + int colorCount, + SkTileMode mode, + const Interpolation& interpolation, + const SkMatrix* localMatrix) { + if (startRadius < 0 || endRadius < 0) { + return nullptr; + } + if (!SkGradientShaderBase::ValidGradient(colors, colorCount, mode, interpolation)) { + return nullptr; + } + if (SkScalarNearlyZero((start - end).length(), SkGradientShaderBase::kDegenerateThreshold)) { + // If the center positions are the same, then the gradient is the radial variant of a 2 pt + // conical gradient, an actual radial gradient (startRadius == 0), or it is fully degenerate + // (startRadius == endRadius). + if (SkScalarNearlyEqual(startRadius, endRadius, + SkGradientShaderBase::kDegenerateThreshold)) { + // Degenerate case, where the interpolation region area approaches zero. The proper + // behavior depends on the tile mode, which is consistent with the default degenerate + // gradient behavior, except when mode = clamp and the radii > 0. + if (mode == SkTileMode::kClamp && + endRadius > SkGradientShaderBase::kDegenerateThreshold) { + // The interpolation region becomes an infinitely thin ring at the radius, so the + // final gradient will be the first color repeated from p=0 to 1, and then a hard + // stop switching to the last color at p=1. + static constexpr SkScalar circlePos[3] = {0, 1, 1}; + SkColor4f reColors[3] = {colors[0], colors[0], colors[colorCount - 1]}; + return MakeRadial(start, endRadius, reColors, std::move(colorSpace), + circlePos, 3, mode, interpolation, localMatrix); + } else { + // Otherwise use the default degenerate case + return SkGradientShaderBase::MakeDegenerateGradient(colors, pos, colorCount, + std::move(colorSpace), mode); + } + } else if (SkScalarNearlyZero(startRadius, SkGradientShaderBase::kDegenerateThreshold)) { + // We can treat this gradient as radial, which is faster. If we got here, we know + // that endRadius is not equal to 0, so this produces a meaningful gradient + return MakeRadial(start, endRadius, colors, std::move(colorSpace), pos, colorCount, + mode, interpolation, localMatrix); + } + // Else it's the 2pt conical radial variant with no degenerate radii, so fall through to the + // regular 2pt constructor. + } + + if (localMatrix && !localMatrix->invert(nullptr)) { + return nullptr; + } + EXPAND_1_COLOR(colorCount); + + SkGradientShaderBase::ColorStopOptimizer opt(colors, pos, colorCount, mode); + + SkGradientShaderBase::Descriptor desc(opt.fColors, std::move(colorSpace), opt.fPos, + opt.fCount, mode, interpolation); + return SkTwoPointConicalGradient::Create(start, startRadius, end, endRadius, desc, localMatrix); +} + +#undef EXPAND_1_COLOR + +sk_sp SkGradientShader::MakeTwoPointConical(const SkPoint& start, + SkScalar startRadius, + const SkPoint& end, + SkScalar endRadius, + const SkColor colors[], + const SkScalar pos[], + int colorCount, + SkTileMode mode, + uint32_t flags, + const SkMatrix* localMatrix) { + SkColorConverter converter(colors, colorCount); + return MakeTwoPointConical(start, startRadius, end, endRadius, converter.fColors4f.begin(), + nullptr, pos, colorCount, mode, flags, localMatrix); +} + +void SkRegisterTwoPointConicalGradientShaderFlattenable() { + SK_REGISTER_FLATTENABLE(SkTwoPointConicalGradient); +} diff --git a/gfx/skia/skia/src/sksl/GLSL.std.450.h b/gfx/skia/skia/src/sksl/GLSL.std.450.h new file mode 100644 index 0000000000..943fd8650f --- /dev/null +++ b/gfx/skia/skia/src/sksl/GLSL.std.450.h @@ -0,0 +1,131 @@ +/* +** Copyright (c) 2014-2016 The Khronos Group Inc. +** +** Permission is hereby granted, free of charge, to any person obtaining a copy +** of this software and/or associated documentation files (the "Materials"), +** to deal in the Materials without restriction, including without limitation +** the rights to use, copy, modify, merge, publish, distribute, sublicense, +** and/or sell copies of the Materials, and to permit persons to whom the +** Materials are furnished to do so, subject to the following conditions: +** +** The above copyright notice and this permission notice shall be included in +** all copies or substantial portions of the Materials. +** +** MODIFICATIONS TO THIS FILE MAY MEAN IT NO LONGER ACCURATELY REFLECTS KHRONOS +** STANDARDS. THE UNMODIFIED, NORMATIVE VERSIONS OF KHRONOS SPECIFICATIONS AND +** HEADER INFORMATION ARE LOCATED AT https://www.khronos.org/registry/ +** +** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +** OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL +** THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +** FROM,OUT OF OR IN CONNECTION WITH THE MATERIALS OR THE USE OR OTHER DEALINGS +** IN THE MATERIALS. +*/ + +#ifndef GLSLstd450_H +#define GLSLstd450_H + +static const int GLSLstd450Version = 100; +static const int GLSLstd450Revision = 3; + +enum GLSLstd450 { + GLSLstd450Bad = 0, // Don't use + + GLSLstd450Round = 1, + GLSLstd450RoundEven = 2, + GLSLstd450Trunc = 3, + GLSLstd450FAbs = 4, + GLSLstd450SAbs = 5, + GLSLstd450FSign = 6, + GLSLstd450SSign = 7, + GLSLstd450Floor = 8, + GLSLstd450Ceil = 9, + GLSLstd450Fract = 10, + + GLSLstd450Radians = 11, + GLSLstd450Degrees = 12, + GLSLstd450Sin = 13, + GLSLstd450Cos = 14, + GLSLstd450Tan = 15, + GLSLstd450Asin = 16, + GLSLstd450Acos = 17, + GLSLstd450Atan = 18, + GLSLstd450Sinh = 19, + GLSLstd450Cosh = 20, + GLSLstd450Tanh = 21, + GLSLstd450Asinh = 22, + GLSLstd450Acosh = 23, + GLSLstd450Atanh = 24, + GLSLstd450Atan2 = 25, + + GLSLstd450Pow = 26, + GLSLstd450Exp = 27, + GLSLstd450Log = 28, + GLSLstd450Exp2 = 29, + GLSLstd450Log2 = 30, + GLSLstd450Sqrt = 31, + GLSLstd450InverseSqrt = 32, + + GLSLstd450Determinant = 33, + GLSLstd450MatrixInverse = 34, + + GLSLstd450Modf = 35, // second operand needs an OpVariable to write to + GLSLstd450ModfStruct = 36, // no OpVariable operand + GLSLstd450FMin = 37, + GLSLstd450UMin = 38, + GLSLstd450SMin = 39, + GLSLstd450FMax = 40, + GLSLstd450UMax = 41, + GLSLstd450SMax = 42, + GLSLstd450FClamp = 43, + GLSLstd450UClamp = 44, + GLSLstd450SClamp = 45, + GLSLstd450FMix = 46, + GLSLstd450IMix = 47, // Reserved + GLSLstd450Step = 48, + GLSLstd450SmoothStep = 49, + + GLSLstd450Fma = 50, + GLSLstd450Frexp = 51, // second operand needs an OpVariable to write to + GLSLstd450FrexpStruct = 52, // no OpVariable operand + GLSLstd450Ldexp = 53, + + GLSLstd450PackSnorm4x8 = 54, + GLSLstd450PackUnorm4x8 = 55, + GLSLstd450PackSnorm2x16 = 56, + GLSLstd450PackUnorm2x16 = 57, + GLSLstd450PackHalf2x16 = 58, + GLSLstd450PackDouble2x32 = 59, + GLSLstd450UnpackSnorm2x16 = 60, + GLSLstd450UnpackUnorm2x16 = 61, + GLSLstd450UnpackHalf2x16 = 62, + GLSLstd450UnpackSnorm4x8 = 63, + GLSLstd450UnpackUnorm4x8 = 64, + GLSLstd450UnpackDouble2x32 = 65, + + GLSLstd450Length = 66, + GLSLstd450Distance = 67, + GLSLstd450Cross = 68, + GLSLstd450Normalize = 69, + GLSLstd450FaceForward = 70, + GLSLstd450Reflect = 71, + GLSLstd450Refract = 72, + + GLSLstd450FindILsb = 73, + GLSLstd450FindSMsb = 74, + GLSLstd450FindUMsb = 75, + + GLSLstd450InterpolateAtCentroid = 76, + GLSLstd450InterpolateAtSample = 77, + GLSLstd450InterpolateAtOffset = 78, + + GLSLstd450NMin = 79, + GLSLstd450NMax = 80, + GLSLstd450NClamp = 81, + + GLSLstd450Count +}; + +#endif // #ifndef GLSLstd450_H diff --git a/gfx/skia/skia/src/sksl/README.md b/gfx/skia/skia/src/sksl/README.md new file mode 100644 index 0000000000..862f5c6965 --- /dev/null +++ b/gfx/skia/skia/src/sksl/README.md @@ -0,0 +1,158 @@ +# Overview + +SkSL ("Skia Shading Language") is a variant of GLSL which is used as Skia's +internal shading language. SkSL is, at its heart, a single standardized version +of GLSL which avoids all of the various version and dialect differences found +in GLSL "in the wild", but it does bring a few of its own changes to the table. + +Skia uses the SkSL compiler to convert SkSL code to GLSL, GLSL ES, SPIR-V, or +MSL before handing it over to the graphics driver. + + +# Differences from GLSL + +* Precision modifiers are not used. 'float', 'int', and 'uint' are always high + precision. New types 'half', 'short', and 'ushort' are medium precision (we + do not use low precision). +* Vector types are named , so float2 instead of vec2 and + bool4 instead of bvec4 +* Matrix types are named x, so float2x3 instead of + mat2x3 and double4x4 instead of dmat4 +* GLSL caps can be referenced via the syntax 'sk_Caps.', e.g. + sk_Caps.integerSupport. The value will be a constant boolean or int, + as appropriate. As SkSL supports constant folding and branch elimination, this + means that an 'if' statement which statically queries a cap will collapse down + to the chosen branch, meaning that: + + if (sk_Caps.integerSupport) + do_something(); + else + do_something_else(); + + will compile as if you had written either 'do_something();' or + 'do_something_else();', depending on whether that cap is enabled or not. +* no #version statement is required, and it will be ignored if present +* the output color is sk_FragColor (do not declare it) +* use sk_Position instead of gl_Position. sk_Position is in device coordinates + rather than normalized coordinates. +* use sk_PointSize instead of gl_PointSize +* use sk_VertexID instead of gl_VertexID +* use sk_InstanceID instead of gl_InstanceID +* the fragment coordinate is sk_FragCoord, and is always relative to the upper + left. +* use sk_Clockwise instead of gl_FrontFacing. This is always relative to an + upper left origin. +* you do not need to include ".0" to make a number a float (meaning that + "float2(x, y) * 4" is perfectly legal in SkSL, unlike GLSL where it would + often have to be expressed "float2(x, y) * 4.0". There is no performance + penalty for this, as the number is converted to a float at compile time) +* type suffixes on numbers (1.0f, 0xFFu) are both unnecessary and unsupported +* creating a smaller vector from a larger vector (e.g. float2(float3(1))) is + intentionally disallowed, as it is just a wordier way of performing a swizzle. + Use swizzles instead. +* Swizzle components, in addition to the normal rgba / xyzw components, can also + be LTRB (meaning "left/top/right/bottom", for when we store rectangles in + vectors), and may also be the constants '0' or '1' to produce a constant 0 or + 1 in that channel instead of selecting anything from the source vector. + foo.rgb1 is equivalent to float4(foo.rgb, 1). +* All texture functions are named "sample", e.g. sample(sampler2D, float3) is + equivalent to GLSL's textureProj(sampler2D, float3). +* Functions support the 'inline' modifier, which causes the compiler to ignore + its normal inlining heuristics and inline the function if at all possible +* some built-in functions and one or two rarely-used language features are not + yet supported (sorry!) + + +# Synchronization Primitives + +SkSL offers atomic operations and synchronization primitives geared towards GPU compute +programs. These primitives are designed to abstract over the capabilities provided by +MSL, SPIR-V, and WGSL, and differ from the corresponding primitives in GLSL. + +## Atomics + +SkSL provides the `atomicUint` type. This is an opaque type that requires the use of an +atomic intrinsic (such as `atomicLoad`, `atomicStore`, and `atomicAdd`) to act on its value (which +is of type `uint`). + +A variable with the `atomicUint` type must be declared inside a writable storage buffer block or as +a workgroup-shared variable. When declared inside a buffer block, it is guaranteed to conform to the +same size and stride as a `uint`. + +``` +workgroup atomicUint myLocalAtomicUint; + +layout(set = 0, binding = 0) buffer mySSBO { + atomicUint myGlobalAtomicUint; +}; + +``` + +An `atomicUint` can be declared as a struct member or the element type of an array, provided that +the struct/array type is only instantiated in a workgroup-shared or storage buffer block variable. + +### Backend considerations and differences from GLSL + +`atomicUint` should not be confused with the GLSL [`atomic_uint` (aka Atomic +Counter)](https://www.khronos.org/opengl/wiki/Atomic_Counter) type. The semantics provided by +`atomicUint` are more similar to GLSL ["Atomic Memory +Functions"](https://www.khronos.org/opengl/wiki/Atomic_Variable_Operations) +(see GLSL Spec v4.3, 8.11 "Atomic Memory Functions"). The key difference is that SkSL atomic +operations only operate on a variable of type `atomicUint` while GLSL Atomic Memory Functions can +operate over arbitrary memory locations (such as a component of a vector). + +* The semantics of `atomicUint` are similar to Metal's `atomic` and WGSL's `atomic`. + These are the types that an `atomicUint` is translated to when targeting Metal and WGSL. +* When translated to Metal, the atomic intrinsics use relaxed memory order semantics. +* When translated to SPIR-V, the atomic intrinsics use relaxed [memory + semantics](https://registry.khronos.org/SPIR-V/specs/unified1/SPIRV.html#Memory_Semantics_-id-) + (i.e. `0x0 None`). The [memory + scope](https://registry.khronos.org/SPIR-V/specs/unified1/SPIRV.html#Scope_-id-) is either `1 + Device` or `2 Workgroup` depending on whether the `atomicUint` is declared in a buffer block or + workgroup variable. + +## Barriers + +SkSL provides two barrier intrinsics: `workgroupBarrier()` and `storageBarrier()`. These functions +are only available in compute programs and synchronize access to workgroup-shared and storage buffer +memory between invocations in the same workgroup. They provide the same semantics as the equivalent +[WGSL Synchronization Built-in Functions](https://www.w3.org/TR/WGSL/#sync-builtin-functions). More +specifically: + +* Both functions execute a control barrier with Acquire/Release memory ordering. +* Both functions use a `Workgroup` execution and memory scope. This means that a coherent memory + view is only guaranteed between invocations in the same workgroup and NOT across workgroups in a + given compute pipeline dispatch. If multiple workgroups require a _synchronized_ coherent view + over the same shared mutable state, their access must be synchronized via other means (such as a + pipeline barrier between multiple dispatches). + +### Backend considerations + +* The closest GLSL equivalent for `workgroupBarrier()` is the +[`barrier()`](https://registry.khronos.org/OpenGL-Refpages/gl4/html/barrier.xhtml) intrinsic. Both +`workgroupBarrier()` and `storageBarrier()` can be defined as the following invocations of the +`controlBarrier` intrinsic defined in +[GL_KHR_memory_scope_semantics](https://github.com/KhronosGroup/GLSL/blob/master/extensions/khr/GL_KHR_memory_scope_semantics.txt): + +``` +// workgroupBarrier(): +controlBarrier(gl_ScopeWorkgroup, + gl_ScopeWorkgroup, + gl_StorageSemanticsShared, + gl_SemanticsAcquireRelease); + +// storageBarrier(): +controlBarrier(gl_ScopeWorkgroup, + gl_ScopeWorkgroup, + gl_StorageSemanticsBuffer, + gl_SemanticsAcquireRelease); +``` + +* In Metal, `workgroupBarrier()` is equivalent to `threadgroup_barrier(mem_flags::mem_threadgroup)`. + `storageBarrier()` is equivalent to `threadgroup_barrier(mem_flags::mem_device)`. + +* In Vulkan SPIR-V, `workgroupBarrier()` is equivalent to `OpControlBarrier` with `Workgroup` + execution and memory scope, and `AcquireRelease | WorkgroupMemory` memory semantics. + + `storageBarrier()` is equivalent to `OpControlBarrier` with `Workgroup` execution and memory + scope, and `AcquireRelease | UniformMemory` memory semantics. diff --git a/gfx/skia/skia/src/sksl/SkSLAnalysis.cpp b/gfx/skia/skia/src/sksl/SkSLAnalysis.cpp new file mode 100644 index 0000000000..a7aba3d02c --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLAnalysis.cpp @@ -0,0 +1,705 @@ +/* + * Copyright 2020 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLAnalysis.h" + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLLayout.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLSampleUsage.h" +#include "include/private/SkSLStatement.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLOperator.h" +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLConstantFolder.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLIntrinsicList.h" +#include "src/sksl/analysis/SkSLNoOpErrorReporter.h" +#include "src/sksl/analysis/SkSLProgramUsage.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLBlock.h" +#include "src/sksl/ir/SkSLChildCall.h" +#include "src/sksl/ir/SkSLConstructor.h" +#include "src/sksl/ir/SkSLDoStatement.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLExpressionStatement.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLIfStatement.h" +#include "src/sksl/ir/SkSLIndexExpression.h" +#include "src/sksl/ir/SkSLPostfixExpression.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLReturnStatement.h" +#include "src/sksl/ir/SkSLSwitchCase.h" +#include "src/sksl/ir/SkSLSwitchStatement.h" +#include "src/sksl/ir/SkSLSwizzle.h" +#include "src/sksl/ir/SkSLTernaryExpression.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" +#include "src/sksl/transform/SkSLProgramWriter.h" + +#include +#include +#include + +namespace SkSL { + +namespace { + +// Visitor that determines the merged SampleUsage for a given child in the program. +class MergeSampleUsageVisitor : public ProgramVisitor { +public: + MergeSampleUsageVisitor(const Context& context, + const Variable& child, + bool writesToSampleCoords) + : fContext(context), fChild(child), fWritesToSampleCoords(writesToSampleCoords) {} + + SampleUsage visit(const Program& program) { + fUsage = SampleUsage(); // reset to none + INHERITED::visit(program); + return fUsage; + } + + int elidedSampleCoordCount() const { return fElidedSampleCoordCount; } + +protected: + const Context& fContext; + const Variable& fChild; + const bool fWritesToSampleCoords; + SampleUsage fUsage; + int fElidedSampleCoordCount = 0; + + bool visitExpression(const Expression& e) override { + // Looking for child(...) + if (e.is() && &e.as().child() == &fChild) { + // Determine the type of call at this site, and merge it with the accumulated state + const ExpressionArray& arguments = e.as().arguments(); + SkASSERT(arguments.size() >= 1); + + const Expression* maybeCoords = arguments[0].get(); + if (maybeCoords->type().matches(*fContext.fTypes.fFloat2)) { + // If the coords are a direct reference to the program's sample-coords, and those + // coords are never modified, we can conservatively turn this into PassThrough + // sampling. In all other cases, we consider it Explicit. + if (!fWritesToSampleCoords && maybeCoords->is() && + maybeCoords->as().variable()->modifiers().fLayout.fBuiltin == + SK_MAIN_COORDS_BUILTIN) { + fUsage.merge(SampleUsage::PassThrough()); + ++fElidedSampleCoordCount; + } else { + fUsage.merge(SampleUsage::Explicit()); + } + } else { + // child(inputColor) or child(srcColor, dstColor) -> PassThrough + fUsage.merge(SampleUsage::PassThrough()); + } + } + + return INHERITED::visitExpression(e); + } + + using INHERITED = ProgramVisitor; +}; + +// Visitor that searches for child calls from a function other than main() +class SampleOutsideMainVisitor : public ProgramVisitor { +public: + SampleOutsideMainVisitor() {} + + bool visitExpression(const Expression& e) override { + if (e.is()) { + return true; + } + return INHERITED::visitExpression(e); + } + + bool visitProgramElement(const ProgramElement& p) override { + return p.is() && + !p.as().declaration().isMain() && + INHERITED::visitProgramElement(p); + } + + using INHERITED = ProgramVisitor; +}; + +class ReturnsNonOpaqueColorVisitor : public ProgramVisitor { +public: + ReturnsNonOpaqueColorVisitor() {} + + bool visitStatement(const Statement& s) override { + if (s.is()) { + const Expression* e = s.as().expression().get(); + bool knownOpaque = e && e->type().slotCount() == 4 && + ConstantFolder::GetConstantValueForVariable(*e) + ->getConstantValue(/*n=*/3) + .value_or(0) == 1; + return !knownOpaque; + } + return INHERITED::visitStatement(s); + } + + bool visitExpression(const Expression& e) override { + // No need to recurse into expressions, these can never contain return statements + return false; + } + + using INHERITED = ProgramVisitor; + using INHERITED::visitProgramElement; +}; + +// Visitor that counts the number of nodes visited +class NodeCountVisitor : public ProgramVisitor { +public: + NodeCountVisitor(int limit) : fLimit(limit) {} + + int visit(const Statement& s) { + this->visitStatement(s); + return fCount; + } + + bool visitExpression(const Expression& e) override { + ++fCount; + return (fCount >= fLimit) || INHERITED::visitExpression(e); + } + + bool visitProgramElement(const ProgramElement& p) override { + ++fCount; + return (fCount >= fLimit) || INHERITED::visitProgramElement(p); + } + + bool visitStatement(const Statement& s) override { + ++fCount; + return (fCount >= fLimit) || INHERITED::visitStatement(s); + } + +private: + int fCount = 0; + int fLimit; + + using INHERITED = ProgramVisitor; +}; + +class VariableWriteVisitor : public ProgramVisitor { +public: + VariableWriteVisitor(const Variable* var) + : fVar(var) {} + + bool visit(const Statement& s) { + return this->visitStatement(s); + } + + bool visitExpression(const Expression& e) override { + if (e.is()) { + const VariableReference& ref = e.as(); + if (ref.variable() == fVar && + (ref.refKind() == VariableReference::RefKind::kWrite || + ref.refKind() == VariableReference::RefKind::kReadWrite || + ref.refKind() == VariableReference::RefKind::kPointer)) { + return true; + } + } + return INHERITED::visitExpression(e); + } + +private: + const Variable* fVar; + + using INHERITED = ProgramVisitor; +}; + +// This isn't actually using ProgramVisitor, because it only considers a subset of the fields for +// any given expression kind. For instance, when indexing an array (e.g. `x[1]`), we only want to +// know if the base (`x`) is assignable; the index expression (`1`) doesn't need to be. +class IsAssignableVisitor { +public: + IsAssignableVisitor(ErrorReporter* errors) : fErrors(errors) {} + + bool visit(Expression& expr, Analysis::AssignmentInfo* info) { + int oldErrorCount = fErrors->errorCount(); + this->visitExpression(expr); + if (info) { + info->fAssignedVar = fAssignedVar; + } + return fErrors->errorCount() == oldErrorCount; + } + + void visitExpression(Expression& expr, const FieldAccess* fieldAccess = nullptr) { + switch (expr.kind()) { + case Expression::Kind::kVariableReference: { + VariableReference& varRef = expr.as(); + const Variable* var = varRef.variable(); + auto fieldName = [&] { + return fieldAccess ? fieldAccess->description(OperatorPrecedence::kTopLevel) + : std::string(var->name()); + }; + if (var->modifiers().fFlags & (Modifiers::kConst_Flag | Modifiers::kUniform_Flag)) { + fErrors->error(expr.fPosition, + "cannot modify immutable variable '" + fieldName() + "'"); + } else if (var->storage() == Variable::Storage::kGlobal && + (var->modifiers().fFlags & Modifiers::kIn_Flag)) { + fErrors->error(expr.fPosition, + "cannot modify pipeline input variable '" + fieldName() + "'"); + } else { + SkASSERT(fAssignedVar == nullptr); + fAssignedVar = &varRef; + } + break; + } + case Expression::Kind::kFieldAccess: { + const FieldAccess& f = expr.as(); + this->visitExpression(*f.base(), &f); + break; + } + case Expression::Kind::kSwizzle: { + const Swizzle& swizzle = expr.as(); + this->checkSwizzleWrite(swizzle); + this->visitExpression(*swizzle.base(), fieldAccess); + break; + } + case Expression::Kind::kIndex: + this->visitExpression(*expr.as().base(), fieldAccess); + break; + + case Expression::Kind::kPoison: + break; + + default: + fErrors->error(expr.fPosition, "cannot assign to this expression"); + break; + } + } + +private: + void checkSwizzleWrite(const Swizzle& swizzle) { + int bits = 0; + for (int8_t idx : swizzle.components()) { + SkASSERT(idx >= SwizzleComponent::X && idx <= SwizzleComponent::W); + int bit = 1 << idx; + if (bits & bit) { + fErrors->error(swizzle.fPosition, + "cannot write to the same swizzle field more than once"); + break; + } + bits |= bit; + } + } + + ErrorReporter* fErrors; + VariableReference* fAssignedVar = nullptr; + + using INHERITED = ProgramVisitor; +}; + +} // namespace + +//////////////////////////////////////////////////////////////////////////////// +// Analysis + +SampleUsage Analysis::GetSampleUsage(const Program& program, + const Variable& child, + bool writesToSampleCoords, + int* elidedSampleCoordCount) { + MergeSampleUsageVisitor visitor(*program.fContext, child, writesToSampleCoords); + SampleUsage result = visitor.visit(program); + if (elidedSampleCoordCount) { + *elidedSampleCoordCount += visitor.elidedSampleCoordCount(); + } + return result; +} + +bool Analysis::ReferencesBuiltin(const Program& program, int builtin) { + SkASSERT(program.fUsage); + for (const auto& [variable, counts] : program.fUsage->fVariableCounts) { + if (counts.fRead > 0 && variable->modifiers().fLayout.fBuiltin == builtin) { + return true; + } + } + return false; +} + +bool Analysis::ReferencesSampleCoords(const Program& program) { + return Analysis::ReferencesBuiltin(program, SK_MAIN_COORDS_BUILTIN); +} + +bool Analysis::ReferencesFragCoords(const Program& program) { + return Analysis::ReferencesBuiltin(program, SK_FRAGCOORD_BUILTIN); +} + +bool Analysis::CallsSampleOutsideMain(const Program& program) { + SampleOutsideMainVisitor visitor; + return visitor.visit(program); +} + +bool Analysis::CallsColorTransformIntrinsics(const Program& program) { + for (auto [fn, count] : program.usage()->fCallCounts) { + if (count != 0 && (fn->intrinsicKind() == k_toLinearSrgb_IntrinsicKind || + fn->intrinsicKind() == k_fromLinearSrgb_IntrinsicKind)) { + return true; + } + } + return false; +} + +bool Analysis::ReturnsOpaqueColor(const FunctionDefinition& function) { + ReturnsNonOpaqueColorVisitor visitor; + return !visitor.visitProgramElement(function); +} + +bool Analysis::ContainsRTAdjust(const Expression& expr) { + class ContainsRTAdjustVisitor : public ProgramVisitor { + public: + bool visitExpression(const Expression& expr) override { + if (expr.is() && + expr.as().variable()->name() == Compiler::RTADJUST_NAME) { + return true; + } + return INHERITED::visitExpression(expr); + } + + using INHERITED = ProgramVisitor; + }; + + ContainsRTAdjustVisitor visitor; + return visitor.visitExpression(expr); +} + +bool Analysis::IsCompileTimeConstant(const Expression& expr) { + class IsCompileTimeConstantVisitor : public ProgramVisitor { + public: + bool visitExpression(const Expression& expr) override { + switch (expr.kind()) { + case Expression::Kind::kLiteral: + // Literals are compile-time constants. + return false; + + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorCompound: + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorStruct: + // Constructors might be compile-time constants, if they are composed entirely + // of literals and constructors. (Casting constructors are intentionally omitted + // here. If the value inside was a compile-time constant, we would have not have + // generated a cast at all.) + return INHERITED::visitExpression(expr); + + default: + // This expression isn't a compile-time constant. + fIsConstant = false; + return true; + } + } + + bool fIsConstant = true; + using INHERITED = ProgramVisitor; + }; + + IsCompileTimeConstantVisitor visitor; + visitor.visitExpression(expr); + return visitor.fIsConstant; +} + +bool Analysis::DetectVarDeclarationWithoutScope(const Statement& stmt, ErrorReporter* errors) { + // A variable declaration can create either a lone VarDeclaration or an unscoped Block + // containing multiple VarDeclaration statements. We need to detect either case. + const Variable* var; + if (stmt.is()) { + // The single-variable case. No blocks at all. + var = stmt.as().var(); + } else if (stmt.is()) { + // The multiple-variable case: an unscoped, non-empty block... + const Block& block = stmt.as(); + if (block.isScope() || block.children().empty()) { + return false; + } + // ... holding a variable declaration. + const Statement& innerStmt = *block.children().front(); + if (!innerStmt.is()) { + return false; + } + var = innerStmt.as().var(); + } else { + // This statement wasn't a variable declaration. No problem. + return false; + } + + // Report an error. + SkASSERT(var); + if (errors) { + errors->error(var->fPosition, + "variable '" + std::string(var->name()) + "' must be created in a scope"); + } + return true; +} + +int Analysis::NodeCountUpToLimit(const FunctionDefinition& function, int limit) { + return NodeCountVisitor{limit}.visit(*function.body()); +} + +bool Analysis::StatementWritesToVariable(const Statement& stmt, const Variable& var) { + return VariableWriteVisitor(&var).visit(stmt); +} + +bool Analysis::IsAssignable(Expression& expr, AssignmentInfo* info, ErrorReporter* errors) { + NoOpErrorReporter unusedErrors; + return IsAssignableVisitor{errors ? errors : &unusedErrors}.visit(expr, info); +} + +bool Analysis::UpdateVariableRefKind(Expression* expr, + VariableReference::RefKind kind, + ErrorReporter* errors) { + Analysis::AssignmentInfo info; + if (!Analysis::IsAssignable(*expr, &info, errors)) { + return false; + } + if (!info.fAssignedVar) { + if (errors) { + errors->error(expr->fPosition, "can't assign to expression '" + expr->description() + + "'"); + } + return false; + } + info.fAssignedVar->setRefKind(kind); + return true; +} + +class ES2IndexingVisitor : public ProgramVisitor { +public: + ES2IndexingVisitor(ErrorReporter& errors) : fErrors(errors) {} + + bool visitStatement(const Statement& s) override { + if (s.is()) { + const ForStatement& f = s.as(); + SkASSERT(f.initializer() && f.initializer()->is()); + const Variable* var = f.initializer()->as().var(); + auto [iter, inserted] = fLoopIndices.insert(var); + SkASSERT(inserted); + bool result = this->visitStatement(*f.statement()); + fLoopIndices.erase(iter); + return result; + } + return INHERITED::visitStatement(s); + } + + bool visitExpression(const Expression& e) override { + if (e.is()) { + const IndexExpression& i = e.as(); + if (!Analysis::IsConstantIndexExpression(*i.index(), &fLoopIndices)) { + fErrors.error(i.fPosition, "index expression must be constant"); + return true; + } + } + return INHERITED::visitExpression(e); + } + + using ProgramVisitor::visitProgramElement; + +private: + ErrorReporter& fErrors; + std::set fLoopIndices; + using INHERITED = ProgramVisitor; +}; + +void Analysis::ValidateIndexingForES2(const ProgramElement& pe, ErrorReporter& errors) { + ES2IndexingVisitor visitor(errors); + visitor.visitProgramElement(pe); +} + +//////////////////////////////////////////////////////////////////////////////// +// ProgramVisitor + +bool ProgramVisitor::visit(const Program& program) { + for (const ProgramElement* pe : program.elements()) { + if (this->visitProgramElement(*pe)) { + return true; + } + } + return false; +} + +template bool TProgramVisitor::visitExpression(typename T::Expression& e) { + switch (e.kind()) { + case Expression::Kind::kFunctionReference: + case Expression::Kind::kLiteral: + case Expression::Kind::kMethodReference: + case Expression::Kind::kPoison: + case Expression::Kind::kSetting: + case Expression::Kind::kTypeReference: + case Expression::Kind::kVariableReference: + // Leaf expressions return false + return false; + + case Expression::Kind::kBinary: { + auto& b = e.template as(); + return (b.left() && this->visitExpressionPtr(b.left())) || + (b.right() && this->visitExpressionPtr(b.right())); + } + case Expression::Kind::kChildCall: { + // We don't visit the child variable itself, just the arguments + auto& c = e.template as(); + for (auto& arg : c.arguments()) { + if (arg && this->visitExpressionPtr(arg)) { return true; } + } + return false; + } + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorArrayCast: + case Expression::Kind::kConstructorCompound: + case Expression::Kind::kConstructorCompoundCast: + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorStruct: { + auto& c = e.asAnyConstructor(); + for (auto& arg : c.argumentSpan()) { + if (this->visitExpressionPtr(arg)) { return true; } + } + return false; + } + case Expression::Kind::kFieldAccess: + return this->visitExpressionPtr(e.template as().base()); + + case Expression::Kind::kFunctionCall: { + auto& c = e.template as(); + for (auto& arg : c.arguments()) { + if (arg && this->visitExpressionPtr(arg)) { return true; } + } + return false; + } + case Expression::Kind::kIndex: { + auto& i = e.template as(); + return this->visitExpressionPtr(i.base()) || this->visitExpressionPtr(i.index()); + } + case Expression::Kind::kPostfix: + return this->visitExpressionPtr(e.template as().operand()); + + case Expression::Kind::kPrefix: + return this->visitExpressionPtr(e.template as().operand()); + + case Expression::Kind::kSwizzle: { + auto& s = e.template as(); + return s.base() && this->visitExpressionPtr(s.base()); + } + + case Expression::Kind::kTernary: { + auto& t = e.template as(); + return this->visitExpressionPtr(t.test()) || + (t.ifTrue() && this->visitExpressionPtr(t.ifTrue())) || + (t.ifFalse() && this->visitExpressionPtr(t.ifFalse())); + } + default: + SkUNREACHABLE; + } +} + +template bool TProgramVisitor::visitStatement(typename T::Statement& s) { + switch (s.kind()) { + case Statement::Kind::kBreak: + case Statement::Kind::kContinue: + case Statement::Kind::kDiscard: + case Statement::Kind::kNop: + // Leaf statements just return false + return false; + + case Statement::Kind::kBlock: + for (auto& stmt : s.template as().children()) { + if (stmt && this->visitStatementPtr(stmt)) { + return true; + } + } + return false; + + case Statement::Kind::kSwitchCase: { + auto& sc = s.template as(); + return this->visitStatementPtr(sc.statement()); + } + case Statement::Kind::kDo: { + auto& d = s.template as(); + return this->visitExpressionPtr(d.test()) || this->visitStatementPtr(d.statement()); + } + case Statement::Kind::kExpression: + return this->visitExpressionPtr(s.template as().expression()); + + case Statement::Kind::kFor: { + auto& f = s.template as(); + return (f.initializer() && this->visitStatementPtr(f.initializer())) || + (f.test() && this->visitExpressionPtr(f.test())) || + (f.next() && this->visitExpressionPtr(f.next())) || + this->visitStatementPtr(f.statement()); + } + case Statement::Kind::kIf: { + auto& i = s.template as(); + return (i.test() && this->visitExpressionPtr(i.test())) || + (i.ifTrue() && this->visitStatementPtr(i.ifTrue())) || + (i.ifFalse() && this->visitStatementPtr(i.ifFalse())); + } + case Statement::Kind::kReturn: { + auto& r = s.template as(); + return r.expression() && this->visitExpressionPtr(r.expression()); + } + case Statement::Kind::kSwitch: { + auto& sw = s.template as(); + if (this->visitExpressionPtr(sw.value())) { + return true; + } + for (auto& c : sw.cases()) { + if (this->visitStatementPtr(c)) { + return true; + } + } + return false; + } + case Statement::Kind::kVarDeclaration: { + auto& v = s.template as(); + return v.value() && this->visitExpressionPtr(v.value()); + } + default: + SkUNREACHABLE; + } +} + +template bool TProgramVisitor::visitProgramElement(typename T::ProgramElement& pe) { + switch (pe.kind()) { + case ProgramElement::Kind::kExtension: + case ProgramElement::Kind::kFunctionPrototype: + case ProgramElement::Kind::kInterfaceBlock: + case ProgramElement::Kind::kModifiers: + case ProgramElement::Kind::kStructDefinition: + // Leaf program elements just return false by default + return false; + + case ProgramElement::Kind::kFunction: + return this->visitStatementPtr(pe.template as().body()); + + case ProgramElement::Kind::kGlobalVar: + return this->visitStatementPtr(pe.template as().declaration()); + + default: + SkUNREACHABLE; + } +} + +template class TProgramVisitor; +template class TProgramVisitor; + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLAnalysis.h b/gfx/skia/skia/src/sksl/SkSLAnalysis.h new file mode 100644 index 0000000000..b875098fda --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLAnalysis.h @@ -0,0 +1,261 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLAnalysis_DEFINED +#define SkSLAnalysis_DEFINED + +#include "include/private/SkSLSampleUsage.h" +#include "include/private/base/SkTArray.h" + +#include +#include +#include +#include + +namespace SkSL { + +class Context; +class ErrorReporter; +class Expression; +class FunctionDeclaration; +class FunctionDefinition; +class Position; +class ProgramElement; +class ProgramUsage; +class Statement; +class SymbolTable; +class Variable; +class VariableReference; +enum class VariableRefKind : int8_t; +struct ForLoopPositions; +struct LoopUnrollInfo; +struct Module; +struct Program; + +/** + * Provides utilities for analyzing SkSL statically before it's composed into a full program. + */ +namespace Analysis { + +/** + * Determines how `program` samples `child`. By default, assumes that the sample coords + * (SK_MAIN_COORDS_BUILTIN) might be modified, so `child.eval(sampleCoords)` is treated as + * Explicit. If writesToSampleCoords is false, treats that as PassThrough, instead. + * If elidedSampleCoordCount is provided, the pointed to value will be incremented by the + * number of sample calls where the above rewrite was performed. + */ +SampleUsage GetSampleUsage(const Program& program, + const Variable& child, + bool writesToSampleCoords = true, + int* elidedSampleCoordCount = nullptr); + +bool ReferencesBuiltin(const Program& program, int builtin); + +bool ReferencesSampleCoords(const Program& program); +bool ReferencesFragCoords(const Program& program); + +bool CallsSampleOutsideMain(const Program& program); + +bool CallsColorTransformIntrinsics(const Program& program); + +/** + * Determines if `function` always returns an opaque color (a vec4 where the last component is known + * to be 1). This is conservative, and based on constant expression analysis. + */ +bool ReturnsOpaqueColor(const FunctionDefinition& function); + +/** + * Checks for recursion or overly-deep function-call chains, and rejects programs which have them. + * Also, computes the size of the program in a completely flattened state--loops fully unrolled, + * function calls inlined--and rejects programs that exceed an arbitrary upper bound. This is + * intended to prevent absurdly large programs from overwhemling SkVM. Only strict-ES2 mode is + * supported; complex control flow is not SkVM-compatible (and this becomes the halting problem) + */ +bool CheckProgramStructure(const Program& program, bool enforceSizeLimit); + +/** Determines if `expr` contains a reference to the variable sk_RTAdjust. */ +bool ContainsRTAdjust(const Expression& expr); + +/** Determines if `expr` has any side effects. (Is the expression state-altering or pure?) */ +bool HasSideEffects(const Expression& expr); + +/** Determines if `expr` is a compile-time constant (composed of just constructors and literals). */ +bool IsCompileTimeConstant(const Expression& expr); + +/** + * Determines if `expr` is a dynamically-uniform expression; this returns true if the expression + * could be evaluated at compile time if uniform values were known. + */ +bool IsDynamicallyUniformExpression(const Expression& expr); + +/** + * Detect an orphaned variable declaration outside of a scope, e.g. if (true) int a;. Returns + * true if an error was reported. + */ +bool DetectVarDeclarationWithoutScope(const Statement& stmt, ErrorReporter* errors = nullptr); + +int NodeCountUpToLimit(const FunctionDefinition& function, int limit); + +/** + * Finds unconditional exits from a switch-case. Returns true if this statement unconditionally + * causes an exit from this switch (via continue, break or return). + */ +bool SwitchCaseContainsUnconditionalExit(Statement& stmt); + +/** + * Finds conditional exits from a switch-case. Returns true if this statement contains a + * conditional that wraps a potential exit from the switch (via continue, break or return). + */ +bool SwitchCaseContainsConditionalExit(Statement& stmt); + +std::unique_ptr GetUsage(const Program& program); +std::unique_ptr GetUsage(const Module& module); + +/** Returns true if the passed-in statement might alter `var`. */ +bool StatementWritesToVariable(const Statement& stmt, const Variable& var); + +/** + * Detects if the passed-in block contains a `continue`, `break` or `return` that could directly + * affect its control flow. (A `continue` or `break` nested inside an inner loop/switch will not + * affect the loop, but a `return` will.) + */ +struct LoopControlFlowInfo { + bool fHasContinue = false; + bool fHasBreak = false; + bool fHasReturn = false; +}; +LoopControlFlowInfo GetLoopControlFlowInfo(const Statement& stmt); + +/** + * Returns true if the expression can be assigned-into. Pass `info` if you want to know the + * VariableReference that will be written to. Pass `errors` to report an error for expressions that + * are not actually writable. + */ +struct AssignmentInfo { + VariableReference* fAssignedVar = nullptr; +}; +bool IsAssignable(Expression& expr, AssignmentInfo* info = nullptr, + ErrorReporter* errors = nullptr); + +/** + * Updates the `refKind` field of the VariableReference at the top level of `expr`. + * If `expr` can be assigned to (`IsAssignable`), true is returned and no errors are reported. + * If not, false is returned. and an error is reported if `errors` is non-null. + */ +bool UpdateVariableRefKind(Expression* expr, VariableRefKind kind, ErrorReporter* errors = nullptr); + +/** + * A "trivial" expression is one where we'd feel comfortable cloning it multiple times in + * the code, without worrying about incurring a performance penalty. Examples: + * - true + * - 3.14159265 + * - myIntVariable + * - myColor.rgb + * - myArray[123] + * - myStruct.myField + * - half4(0) + * + * Trivial-ness is stackable. Somewhat large expressions can occasionally make the cut: + * - half4(myColor.a) + * - myStruct.myArrayField[7].xzy + */ +bool IsTrivialExpression(const Expression& expr); + +/** + * Returns true if both expression trees are the same. Used by the optimizer to look for self- + * assignment or self-comparison; won't necessarily catch complex cases. Rejects expressions + * that may cause side effects. + */ +bool IsSameExpressionTree(const Expression& left, const Expression& right); + +/** + * Returns true if expr is a constant-expression, as defined by GLSL 1.0, section 5.10. + * A constant expression is one of: + * - A literal value + * - A global or local variable qualified as 'const', excluding function parameters + * - An expression formed by an operator on operands that are constant expressions, including + * getting an element of a constant vector or a constant matrix, or a field of a constant + * structure + * - A constructor whose arguments are all constant expressions + * - A built-in function call whose arguments are all constant expressions, with the exception + * of the texture lookup functions + */ +bool IsConstantExpression(const Expression& expr); + +/** + * Returns true if expr is a valid constant-index-expression, as defined by GLSL 1.0, Appendix A, + * Section 5. A constant-index-expression is: + * - A constant-expression + * - Loop indices (as defined in Appendix A, Section 4) + * - Expressions composed of both of the above + */ +bool IsConstantIndexExpression(const Expression& expr, + const std::set* loopIndices); + +/** + * Ensures that a for-loop meets the strict requirements of The OpenGL ES Shading Language 1.00, + * Appendix A, Section 4. + * If the requirements are met, information about the loop's structure is returned. + * If the requirements are not met, the problem is reported via `errors` (if not nullptr), and + * null is returned. + */ +std::unique_ptr GetLoopUnrollInfo(Position pos, + const ForLoopPositions& positions, + const Statement* loopInitializer, + const Expression* loopTest, + const Expression* loopNext, + const Statement* loopStatement, + ErrorReporter* errors); + +void ValidateIndexingForES2(const ProgramElement& pe, ErrorReporter& errors); + +/** Detects functions that fail to return a value on at least one path. */ +bool CanExitWithoutReturningValue(const FunctionDeclaration& funcDecl, const Statement& body); + +/** Determines if a given function has multiple and/or early returns. */ +enum class ReturnComplexity { + kSingleSafeReturn, + kScopedReturns, + kEarlyReturns, +}; +ReturnComplexity GetReturnComplexity(const FunctionDefinition& funcDef); + +/** + * Runs at finalization time to perform any last-minute correctness checks: + * - Reports dangling FunctionReference or TypeReference expressions + * - Reports function `out` params which are never written to (structs are currently exempt) + */ +void DoFinalizationChecks(const Program& program); + +/** + * Error checks compute shader in/outs and returns a vector containing them ordered by location. + */ +SkTArray GetComputeShaderMainParams(const Context& context, + const Program& program); + +/** + * Tracks the symbol table stack, in conjunction with a ProgramVisitor. Inside `visitStatement`, + * pass the current statement and a symbol-table vector to a SymbolTableStackBuilder and the symbol + * table stack will be maintained automatically. + */ +class SymbolTableStackBuilder { +public: + // If the passed-in statement holds a symbol table, adds it to the stack. + SymbolTableStackBuilder(const Statement* stmt, + std::vector>* stack); + + // If a symbol table was added to the stack earlier, removes it from the stack. + ~SymbolTableStackBuilder(); + +private: + std::vector>* fStackToPop = nullptr; +}; + +} // namespace Analysis +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLBuiltinTypes.cpp b/gfx/skia/skia/src/sksl/SkSLBuiltinTypes.cpp new file mode 100644 index 0000000000..460358e54a --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLBuiltinTypes.cpp @@ -0,0 +1,205 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLBuiltinTypes.h" + +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/spirv.h" + +namespace SkSL { + +/** + * Initializes the core SkSL types. + */ +BuiltinTypes::BuiltinTypes() + : fFloat(Type::MakeScalarType( + "float", "f", Type::NumberKind::kFloat, /*priority=*/10, /*bitWidth=*/32)) + , fFloat2(Type::MakeVectorType("float2", "f2", *fFloat, /*columns=*/2)) + , fFloat3(Type::MakeVectorType("float3", "f3", *fFloat, /*columns=*/3)) + , fFloat4(Type::MakeVectorType("float4", "f4", *fFloat, /*columns=*/4)) + , fHalf(Type::MakeScalarType( + "half", "h", Type::NumberKind::kFloat, /*priority=*/9, /*bitWidth=*/16)) + , fHalf2(Type::MakeVectorType("half2", "h2", *fHalf, /*columns=*/2)) + , fHalf3(Type::MakeVectorType("half3", "h3", *fHalf, /*columns=*/3)) + , fHalf4(Type::MakeVectorType("half4", "h4", *fHalf, /*columns=*/4)) + , fInt(Type::MakeScalarType( + "int", "i", Type::NumberKind::kSigned, /*priority=*/7, /*bitWidth=*/32)) + , fInt2(Type::MakeVectorType("int2", "i2", *fInt, /*columns=*/2)) + , fInt3(Type::MakeVectorType("int3", "i3", *fInt, /*columns=*/3)) + , fInt4(Type::MakeVectorType("int4", "i4", *fInt, /*columns=*/4)) + , fUInt(Type::MakeScalarType( + "uint", "I", Type::NumberKind::kUnsigned, /*priority=*/6, /*bitWidth=*/32)) + , fUInt2(Type::MakeVectorType("uint2", "I2", *fUInt, /*columns=*/2)) + , fUInt3(Type::MakeVectorType("uint3", "I3", *fUInt, /*columns=*/3)) + , fUInt4(Type::MakeVectorType("uint4", "I4", *fUInt, /*columns=*/4)) + , fShort(Type::MakeScalarType( + "short", "s", Type::NumberKind::kSigned, /*priority=*/4, /*bitWidth=*/16)) + , fShort2(Type::MakeVectorType("short2", "s2", *fShort, /*columns=*/2)) + , fShort3(Type::MakeVectorType("short3", "s3", *fShort, /*columns=*/3)) + , fShort4(Type::MakeVectorType("short4", "s4", *fShort, /*columns=*/4)) + , fUShort(Type::MakeScalarType( + "ushort", "S", Type::NumberKind::kUnsigned, /*priority=*/3, /*bitWidth=*/16)) + , fUShort2(Type::MakeVectorType("ushort2", "S2", *fUShort, /*columns=*/2)) + , fUShort3(Type::MakeVectorType("ushort3", "S3", *fUShort, /*columns=*/3)) + , fUShort4(Type::MakeVectorType("ushort4", "S4", *fUShort, /*columns=*/4)) + , fBool(Type::MakeScalarType( + "bool", "b", Type::NumberKind::kBoolean, /*priority=*/0, /*bitWidth=*/1)) + , fBool2(Type::MakeVectorType("bool2", "b2", *fBool, /*columns=*/2)) + , fBool3(Type::MakeVectorType("bool3", "b3", *fBool, /*columns=*/3)) + , fBool4(Type::MakeVectorType("bool4", "b4", *fBool, /*columns=*/4)) + , fInvalid(Type::MakeSpecialType("", "O", Type::TypeKind::kOther)) + , fPoison(Type::MakeSpecialType(Compiler::POISON_TAG, "P", Type::TypeKind::kOther)) + , fVoid(Type::MakeSpecialType("void", "v", Type::TypeKind::kVoid)) + , fFloatLiteral(Type::MakeLiteralType("$floatLiteral", *fFloat, /*priority=*/8)) + , fIntLiteral(Type::MakeLiteralType("$intLiteral", *fInt, /*priority=*/5)) + , fFloat2x2(Type::MakeMatrixType("float2x2", "f22", *fFloat, /*columns=*/2, /*rows=*/2)) + , fFloat2x3(Type::MakeMatrixType("float2x3", "f23", *fFloat, /*columns=*/2, /*rows=*/3)) + , fFloat2x4(Type::MakeMatrixType("float2x4", "f24", *fFloat, /*columns=*/2, /*rows=*/4)) + , fFloat3x2(Type::MakeMatrixType("float3x2", "f32", *fFloat, /*columns=*/3, /*rows=*/2)) + , fFloat3x3(Type::MakeMatrixType("float3x3", "f33", *fFloat, /*columns=*/3, /*rows=*/3)) + , fFloat3x4(Type::MakeMatrixType("float3x4", "f34", *fFloat, /*columns=*/3, /*rows=*/4)) + , fFloat4x2(Type::MakeMatrixType("float4x2", "f42", *fFloat, /*columns=*/4, /*rows=*/2)) + , fFloat4x3(Type::MakeMatrixType("float4x3", "f43", *fFloat, /*columns=*/4, /*rows=*/3)) + , fFloat4x4(Type::MakeMatrixType("float4x4", "f44", *fFloat, /*columns=*/4, /*rows=*/4)) + , fHalf2x2(Type::MakeMatrixType("half2x2", "h22", *fHalf, /*columns=*/2, /*rows=*/2)) + , fHalf2x3(Type::MakeMatrixType("half2x3", "h23", *fHalf, /*columns=*/2, /*rows=*/3)) + , fHalf2x4(Type::MakeMatrixType("half2x4", "h24", *fHalf, /*columns=*/2, /*rows=*/4)) + , fHalf3x2(Type::MakeMatrixType("half3x2", "h32", *fHalf, /*columns=*/3, /*rows=*/2)) + , fHalf3x3(Type::MakeMatrixType("half3x3", "h33", *fHalf, /*columns=*/3, /*rows=*/3)) + , fHalf3x4(Type::MakeMatrixType("half3x4", "h34", *fHalf, /*columns=*/3, /*rows=*/4)) + , fHalf4x2(Type::MakeMatrixType("half4x2", "h42", *fHalf, /*columns=*/4, /*rows=*/2)) + , fHalf4x3(Type::MakeMatrixType("half4x3", "h43", *fHalf, /*columns=*/4, /*rows=*/3)) + , fHalf4x4(Type::MakeMatrixType("half4x4", "h44", *fHalf, /*columns=*/4, /*rows=*/4)) + , fVec2(Type::MakeAliasType("vec2", *fFloat2)) + , fVec3(Type::MakeAliasType("vec3", *fFloat3)) + , fVec4(Type::MakeAliasType("vec4", *fFloat4)) + , fIVec2(Type::MakeAliasType("ivec2", *fInt2)) + , fIVec3(Type::MakeAliasType("ivec3", *fInt3)) + , fIVec4(Type::MakeAliasType("ivec4", *fInt4)) + , fBVec2(Type::MakeAliasType("bvec2", *fBool2)) + , fBVec3(Type::MakeAliasType("bvec3", *fBool3)) + , fBVec4(Type::MakeAliasType("bvec4", *fBool4)) + , fMat2(Type::MakeAliasType("mat2", *fFloat2x2)) + , fMat3(Type::MakeAliasType("mat3", *fFloat3x3)) + , fMat4(Type::MakeAliasType("mat4", *fFloat4x4)) + , fMat2x2(Type::MakeAliasType("mat2x2", *fFloat2x2)) + , fMat2x3(Type::MakeAliasType("mat2x3", *fFloat2x3)) + , fMat2x4(Type::MakeAliasType("mat2x4", *fFloat2x4)) + , fMat3x2(Type::MakeAliasType("mat3x2", *fFloat3x2)) + , fMat3x3(Type::MakeAliasType("mat3x3", *fFloat3x3)) + , fMat3x4(Type::MakeAliasType("mat3x4", *fFloat3x4)) + , fMat4x2(Type::MakeAliasType("mat4x2", *fFloat4x2)) + , fMat4x3(Type::MakeAliasType("mat4x3", *fFloat4x3)) + , fMat4x4(Type::MakeAliasType("mat4x4", *fFloat4x4)) + , fTexture2D(Type::MakeTextureType("texture2D", + SpvDim2D, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/false, + Type::TextureAccess::kSample)) + , fTextureExternalOES(Type::MakeTextureType("textureExternalOES", + SpvDim2D, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/false, + Type::TextureAccess::kSample)) + , fTexture2DRect(Type::MakeTextureType("texture2DRect", + SpvDimRect, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/false, + Type::TextureAccess::kSample)) + , fReadWriteTexture2D(Type::MakeTextureType("readWriteTexture2D", + SpvDim2D, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/false, + Type::TextureAccess::kReadWrite)) + , fReadOnlyTexture2D(Type::MakeTextureType("readonlyTexture2D", + SpvDim2D, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/false, + Type::TextureAccess::kRead)) + , fWriteOnlyTexture2D(Type::MakeTextureType("writeonlyTexture2D", + SpvDim2D, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/false, + Type::TextureAccess::kWrite)) + , fGenTexture2D(Type::MakeGenericType("$genTexture2D", + {fReadOnlyTexture2D.get(), + fWriteOnlyTexture2D.get(), + fReadWriteTexture2D.get()})) + , fReadableTexture2D(Type::MakeGenericType("$readableTexture2D", + {fReadOnlyTexture2D.get(), + fInvalid.get(), + fReadWriteTexture2D.get()})) + , fWritableTexture2D(Type::MakeGenericType("$writableTexture2D", + {fInvalid.get(), + fWriteOnlyTexture2D.get(), + fReadWriteTexture2D.get()})) + , fSampler2D(Type::MakeSamplerType("sampler2D", *fTexture2D)) + , fSamplerExternalOES(Type::MakeSamplerType("samplerExternalOES", *fTextureExternalOES)) + , fSampler2DRect(Type::MakeSamplerType("sampler2DRect", *fTexture2DRect)) + + , fSampler(Type::MakeSpecialType("sampler", "ss", Type::TypeKind::kSeparateSampler)) + + , fSubpassInput(Type::MakeTextureType("subpassInput", + SpvDimSubpassData, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/false, + Type::TextureAccess::kRead)) + , fSubpassInputMS(Type::MakeTextureType("subpassInputMS", + SpvDimSubpassData, + /*isDepth=*/false, + /*isArrayedTexture=*/false, + /*isMultisampled=*/true, + Type::TextureAccess::kRead)) + , fGenType(Type::MakeGenericType("$genType", {fFloat.get(), fFloat2.get(), fFloat3.get(), + fFloat4.get()})) + , fGenHType(Type::MakeGenericType("$genHType", {fHalf.get(), fHalf2.get(), fHalf3.get(), + fHalf4.get()})) + , fGenIType(Type::MakeGenericType("$genIType", {fInt.get(), fInt2.get(), fInt3.get(), + fInt4.get()})) + , fGenUType(Type::MakeGenericType("$genUType", {fUInt.get(), fUInt2.get(), fUInt3.get(), + fUInt4.get()})) + , fGenBType(Type::MakeGenericType("$genBType", {fBool.get(), fBool2.get(), fBool3.get(), + fBool4.get()})) + , fMat(Type::MakeGenericType("$mat", {fFloat2x2.get(), fFloat2x3.get(), fFloat2x4.get(), + fFloat3x2.get(), fFloat3x3.get(), fFloat3x4.get(), + fFloat4x2.get(), fFloat4x3.get(), fFloat4x4.get()})) + , fHMat(Type::MakeGenericType( + "$hmat", + {fHalf2x2.get(), fHalf2x3.get(), fHalf2x4.get(), fHalf3x2.get(), fHalf3x3.get(), + fHalf3x4.get(), fHalf4x2.get(), fHalf4x3.get(), fHalf4x4.get()})) + , fSquareMat(Type::MakeGenericType("$squareMat", {fInvalid.get(), fFloat2x2.get(), + fFloat3x3.get(), fFloat4x4.get()})) + , fSquareHMat(Type::MakeGenericType("$squareHMat", {fInvalid.get(), fHalf2x2.get(), + fHalf3x3.get(), fHalf4x4.get()})) + , fVec(Type::MakeGenericType("$vec", {fInvalid.get(), fFloat2.get(), fFloat3.get(), + fFloat4.get()})) + , fHVec(Type::MakeGenericType("$hvec", {fInvalid.get(), fHalf2.get(), fHalf3.get(), + fHalf4.get()})) + , fIVec(Type::MakeGenericType("$ivec", {fInvalid.get(), fInt2.get(), fInt3.get(), + fInt4.get()})) + , fUVec(Type::MakeGenericType("$uvec", {fInvalid.get(), fUInt2.get(), fUInt3.get(), + fUInt4.get()})) + , fSVec(Type::MakeGenericType("$svec", {fInvalid.get(), fShort2.get(), fShort3.get(), + fShort4.get()})) + , fUSVec(Type::MakeGenericType("$usvec", {fInvalid.get(), fUShort2.get(), fUShort3.get(), + fUShort4.get()})) + , fBVec(Type::MakeGenericType("$bvec", {fInvalid.get(), fBool2.get(), fBool3.get(), + fBool4.get()})) + , fSkCaps(Type::MakeSpecialType("$sk_Caps", "O", Type::TypeKind::kOther)) + , fColorFilter(Type::MakeSpecialType("colorFilter", "CF", Type::TypeKind::kColorFilter)) + , fShader(Type::MakeSpecialType("shader", "SH", Type::TypeKind::kShader)) + , fBlender(Type::MakeSpecialType("blender", "B", Type::TypeKind::kBlender)) + , fAtomicUInt(Type::MakeAtomicType("atomicUint", "au")) {} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLBuiltinTypes.h b/gfx/skia/skia/src/sksl/SkSLBuiltinTypes.h new file mode 100644 index 0000000000..75da759659 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLBuiltinTypes.h @@ -0,0 +1,167 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_BUILTIN_TYPES +#define SKSL_BUILTIN_TYPES + +#include + +#include "src/sksl/ir/SkSLType.h" + +namespace SkSL { + +/** + * Contains the built-in, core types for SkSL. + */ +class BuiltinTypes { +public: + BuiltinTypes(); + + const std::unique_ptr fFloat; + const std::unique_ptr fFloat2; + const std::unique_ptr fFloat3; + const std::unique_ptr fFloat4; + + const std::unique_ptr fHalf; + const std::unique_ptr fHalf2; + const std::unique_ptr fHalf3; + const std::unique_ptr fHalf4; + + const std::unique_ptr fInt; + const std::unique_ptr fInt2; + const std::unique_ptr fInt3; + const std::unique_ptr fInt4; + + const std::unique_ptr fUInt; + const std::unique_ptr fUInt2; + const std::unique_ptr fUInt3; + const std::unique_ptr fUInt4; + + const std::unique_ptr fShort; + const std::unique_ptr fShort2; + const std::unique_ptr fShort3; + const std::unique_ptr fShort4; + + const std::unique_ptr fUShort; + const std::unique_ptr fUShort2; + const std::unique_ptr fUShort3; + const std::unique_ptr fUShort4; + + const std::unique_ptr fBool; + const std::unique_ptr fBool2; + const std::unique_ptr fBool3; + const std::unique_ptr fBool4; + + const std::unique_ptr fInvalid; + const std::unique_ptr fPoison; + const std::unique_ptr fVoid; + const std::unique_ptr fFloatLiteral; + const std::unique_ptr fIntLiteral; + + const std::unique_ptr fFloat2x2; + const std::unique_ptr fFloat2x3; + const std::unique_ptr fFloat2x4; + const std::unique_ptr fFloat3x2; + const std::unique_ptr fFloat3x3; + const std::unique_ptr fFloat3x4; + const std::unique_ptr fFloat4x2; + const std::unique_ptr fFloat4x3; + const std::unique_ptr fFloat4x4; + + const std::unique_ptr fHalf2x2; + const std::unique_ptr fHalf2x3; + const std::unique_ptr fHalf2x4; + const std::unique_ptr fHalf3x2; + const std::unique_ptr fHalf3x3; + const std::unique_ptr fHalf3x4; + const std::unique_ptr fHalf4x2; + const std::unique_ptr fHalf4x3; + const std::unique_ptr fHalf4x4; + + const std::unique_ptr fVec2; + const std::unique_ptr fVec3; + const std::unique_ptr fVec4; + + const std::unique_ptr fIVec2; + const std::unique_ptr fIVec3; + const std::unique_ptr fIVec4; + + const std::unique_ptr fBVec2; + const std::unique_ptr fBVec3; + const std::unique_ptr fBVec4; + + const std::unique_ptr fMat2; + const std::unique_ptr fMat3; + const std::unique_ptr fMat4; + + const std::unique_ptr fMat2x2; + const std::unique_ptr fMat2x3; + const std::unique_ptr fMat2x4; + const std::unique_ptr fMat3x2; + const std::unique_ptr fMat3x3; + const std::unique_ptr fMat3x4; + const std::unique_ptr fMat4x2; + const std::unique_ptr fMat4x3; + const std::unique_ptr fMat4x4; + + const std::unique_ptr fTexture2D; + const std::unique_ptr fTextureExternalOES; + const std::unique_ptr fTexture2DRect; + + const std::unique_ptr fReadWriteTexture2D; + const std::unique_ptr fReadOnlyTexture2D; + const std::unique_ptr fWriteOnlyTexture2D; + + const std::unique_ptr fGenTexture2D; + const std::unique_ptr fReadableTexture2D; + const std::unique_ptr fWritableTexture2D; + + const std::unique_ptr fSampler2D; + const std::unique_ptr fSamplerExternalOES; + const std::unique_ptr fSampler2DRect; + + const std::unique_ptr fSampler; + + const std::unique_ptr fSubpassInput; + const std::unique_ptr fSubpassInputMS; + + const std::unique_ptr fGenType; + const std::unique_ptr fGenHType; + const std::unique_ptr fGenIType; + const std::unique_ptr fGenUType; + const std::unique_ptr fGenBType; + + const std::unique_ptr fMat; + const std::unique_ptr fHMat; + const std::unique_ptr fSquareMat; + const std::unique_ptr fSquareHMat; + + const std::unique_ptr fVec; + + const std::unique_ptr fHVec; + const std::unique_ptr fDVec; + const std::unique_ptr fIVec; + const std::unique_ptr fUVec; + const std::unique_ptr fSVec; + const std::unique_ptr fUSVec; + const std::unique_ptr fByteVec; + const std::unique_ptr fUByteVec; + + const std::unique_ptr fBVec; + + const std::unique_ptr fSkCaps; + + const std::unique_ptr fColorFilter; + const std::unique_ptr fShader; + const std::unique_ptr fBlender; + + const std::unique_ptr fAtomicUInt; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLCompiler.cpp b/gfx/skia/skia/src/sksl/SkSLCompiler.cpp new file mode 100644 index 0000000000..78498b58af --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLCompiler.cpp @@ -0,0 +1,726 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLCompiler.h" + +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLProgramKind.h" +#include "include/private/SkSLSymbol.h" +#include "include/private/base/SkDebug.h" +#include "include/sksl/DSLCore.h" +#include "include/sksl/DSLModifiers.h" +#include "include/sksl/DSLType.h" +#include "src/core/SkTraceEvent.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLInliner.h" +#include "src/sksl/SkSLModuleLoader.h" +#include "src/sksl/SkSLOutputStream.h" +#include "src/sksl/SkSLParser.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/SkSLStringStream.h" +#include "src/sksl/analysis/SkSLProgramUsage.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLField.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionReference.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLSymbolTable.h" // IWYU pragma: keep +#include "src/sksl/ir/SkSLTypeReference.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" +#include "src/sksl/transform/SkSLTransform.h" + +#include +#include +#include +#include + +#if defined(SKSL_STANDALONE) +#include +#endif + +#if defined(SKSL_STANDALONE) || defined(SK_GANESH) || defined(SK_GRAPHITE) +#include "src/sksl/codegen/SkSLGLSLCodeGenerator.h" +#include "src/sksl/codegen/SkSLMetalCodeGenerator.h" +#include "src/sksl/codegen/SkSLSPIRVCodeGenerator.h" +#include "src/sksl/codegen/SkSLSPIRVtoHLSL.h" +#include "src/sksl/codegen/SkSLWGSLCodeGenerator.h" +#endif + +#ifdef SK_ENABLE_SPIRV_VALIDATION +#include "spirv-tools/libspirv.hpp" +#endif + +#ifdef SK_ENABLE_WGSL_VALIDATION +#include "tint/tint.h" +#endif + +namespace SkSL { + +class ModifiersPool; + +// These flags allow tools like Viewer or Nanobench to override the compiler's ProgramSettings. +Compiler::OverrideFlag Compiler::sOptimizer = OverrideFlag::kDefault; +Compiler::OverrideFlag Compiler::sInliner = OverrideFlag::kDefault; + +using RefKind = VariableReference::RefKind; + +class AutoSource { +public: + AutoSource(Compiler* compiler, std::string_view source) + : fCompiler(compiler) { + SkASSERT(!fCompiler->errorReporter().source().data()); + fCompiler->errorReporter().setSource(source); + } + + ~AutoSource() { + fCompiler->errorReporter().setSource(std::string_view()); + } + + Compiler* fCompiler; +}; + +class AutoProgramConfig { +public: + AutoProgramConfig(Context& context, ProgramConfig* config) + : fContext(context) + , fOldConfig(context.fConfig) { + fContext.fConfig = config; + } + + ~AutoProgramConfig() { + fContext.fConfig = fOldConfig; + } + + Context& fContext; + ProgramConfig* fOldConfig; +}; + +class AutoShaderCaps { +public: + AutoShaderCaps(std::shared_ptr& context, const ShaderCaps* caps) + : fContext(context.get()) + , fOldCaps(fContext->fCaps) { + fContext->fCaps = caps; + } + + ~AutoShaderCaps() { + fContext->fCaps = fOldCaps; + } + + Context* fContext; + const ShaderCaps* fOldCaps; +}; + +class AutoModifiersPool { +public: + AutoModifiersPool(std::shared_ptr& context, ModifiersPool* modifiersPool) + : fContext(context.get()) { + SkASSERT(!fContext->fModifiersPool); + fContext->fModifiersPool = modifiersPool; + } + + ~AutoModifiersPool() { + fContext->fModifiersPool = nullptr; + } + + Context* fContext; +}; + +Compiler::Compiler(const ShaderCaps* caps) : fErrorReporter(this), fCaps(caps) { + SkASSERT(caps); + + auto moduleLoader = ModuleLoader::Get(); + fContext = std::make_shared(moduleLoader.builtinTypes(), /*caps=*/nullptr, + fErrorReporter); +} + +Compiler::~Compiler() {} + +const Module* Compiler::moduleForProgramKind(ProgramKind kind) { + auto m = ModuleLoader::Get(); + switch (kind) { + case ProgramKind::kVertex: return m.loadVertexModule(this); + case ProgramKind::kFragment: return m.loadFragmentModule(this); + case ProgramKind::kCompute: return m.loadComputeModule(this); + case ProgramKind::kGraphiteVertex: return m.loadGraphiteVertexModule(this); + case ProgramKind::kGraphiteFragment: return m.loadGraphiteFragmentModule(this); + case ProgramKind::kPrivateRuntimeShader: return m.loadPrivateRTShaderModule(this); + case ProgramKind::kRuntimeColorFilter: + case ProgramKind::kRuntimeShader: + case ProgramKind::kRuntimeBlender: + case ProgramKind::kPrivateRuntimeColorFilter: + case ProgramKind::kPrivateRuntimeBlender: + case ProgramKind::kMeshVertex: + case ProgramKind::kMeshFragment: return m.loadPublicModule(this); + } + SkUNREACHABLE; +} + +void Compiler::FinalizeSettings(ProgramSettings* settings, ProgramKind kind) { + // Honor our optimization-override flags. + switch (sOptimizer) { + case OverrideFlag::kDefault: + break; + case OverrideFlag::kOff: + settings->fOptimize = false; + break; + case OverrideFlag::kOn: + settings->fOptimize = true; + break; + } + + switch (sInliner) { + case OverrideFlag::kDefault: + break; + case OverrideFlag::kOff: + settings->fInlineThreshold = 0; + break; + case OverrideFlag::kOn: + if (settings->fInlineThreshold == 0) { + settings->fInlineThreshold = kDefaultInlineThreshold; + } + break; + } + + // Disable optimization settings that depend on a parent setting which has been disabled. + settings->fInlineThreshold *= (int)settings->fOptimize; + settings->fRemoveDeadFunctions &= settings->fOptimize; + settings->fRemoveDeadVariables &= settings->fOptimize; + + // Runtime effects always allow narrowing conversions. + if (ProgramConfig::IsRuntimeEffect(kind)) { + settings->fAllowNarrowingConversions = true; + } +} + +std::unique_ptr Compiler::compileModule(ProgramKind kind, + const char* moduleName, + std::string moduleSource, + const Module* parent, + ModifiersPool& modifiersPool, + bool shouldInline) { + SkASSERT(parent); + SkASSERT(!moduleSource.empty()); + SkASSERT(this->errorCount() == 0); + + // Modules are shared and cannot rely on shader caps. + AutoShaderCaps autoCaps(fContext, nullptr); + AutoModifiersPool autoPool(fContext, &modifiersPool); + + // Compile the module from source, using default program settings. + ProgramSettings settings; + FinalizeSettings(&settings, kind); + SkSL::Parser parser{this, settings, kind, std::move(moduleSource)}; + std::unique_ptr module = parser.moduleInheritingFrom(parent); + if (this->errorCount() != 0) { + SkDebugf("Unexpected errors compiling %s:\n\n%s\n", moduleName, this->errorText().c_str()); + return nullptr; + } + if (shouldInline) { + this->optimizeModuleAfterLoading(kind, *module); + } + return module; +} + +std::unique_ptr Compiler::convertProgram(ProgramKind kind, + std::string text, + ProgramSettings settings) { + TRACE_EVENT0("skia.shaders", "SkSL::Compiler::convertProgram"); + + // Make sure the passed-in settings are valid. + FinalizeSettings(&settings, kind); + + // Put the ShaderCaps into the context while compiling a program. + AutoShaderCaps autoCaps(fContext, fCaps); + + this->resetErrors(); + + return Parser(this, settings, kind, std::move(text)).program(); +} + +std::unique_ptr Compiler::convertIdentifier(Position pos, std::string_view name) { + const Symbol* result = fSymbolTable->find(name); + if (!result) { + this->errorReporter().error(pos, "unknown identifier '" + std::string(name) + "'"); + return nullptr; + } + switch (result->kind()) { + case Symbol::Kind::kFunctionDeclaration: { + return std::make_unique(*fContext, pos, + &result->as()); + } + case Symbol::Kind::kVariable: { + const Variable* var = &result->as(); + // default to kRead_RefKind; this will be corrected later if the variable is written to + return VariableReference::Make(pos, var, VariableReference::RefKind::kRead); + } + case Symbol::Kind::kField: { + const Field* field = &result->as(); + auto base = VariableReference::Make(pos, &field->owner(), + VariableReference::RefKind::kRead); + return FieldAccess::Make(*fContext, pos, std::move(base), field->fieldIndex(), + FieldAccess::OwnerKind::kAnonymousInterfaceBlock); + } + case Symbol::Kind::kType: { + // go through DSLType so we report errors on private types + dsl::DSLModifiers modifiers; + dsl::DSLType dslType(result->name(), &modifiers, pos); + return TypeReference::Convert(*fContext, pos, &dslType.skslType()); + } + default: + SK_ABORT("unsupported symbol type %d\n", (int) result->kind()); + } +} + +bool Compiler::optimizeModuleBeforeMinifying(ProgramKind kind, Module& module) { + SkASSERT(this->errorCount() == 0); + + auto m = SkSL::ModuleLoader::Get(); + + // Create a temporary program configuration with default settings. + ProgramConfig config; + config.fIsBuiltinCode = true; + config.fKind = kind; + AutoProgramConfig autoConfig(this->context(), &config); + AutoModifiersPool autoPool(fContext, &m.coreModifiers()); + + std::unique_ptr usage = Analysis::GetUsage(module); + + // Assign shorter names to symbols as long as it won't change the external meaning of the code. + Transform::RenamePrivateSymbols(this->context(), module, usage.get(), kind); + + // Replace constant variables with their literal values to save space. + Transform::ReplaceConstVarsWithLiterals(module, usage.get()); + + // Remove any unreachable code. + Transform::EliminateUnreachableCode(module, usage.get()); + + // We can only remove dead functions from runtime shaders, since runtime-effect helper functions + // are isolated from other parts of the program. In a module, an unreferenced function is + // intended to be called by the code that includes the module. + if (kind == ProgramKind::kRuntimeShader) { + while (Transform::EliminateDeadFunctions(this->context(), module, usage.get())) { + // Removing dead functions may cause more functions to become unreferenced. Try again. + } + } + + while (Transform::EliminateDeadLocalVariables(this->context(), module, usage.get())) { + // Removing dead variables may cause more variables to become unreferenced. Try again. + } + + // Runtime shaders are isolated from other parts of the program via name mangling, so we can + // eliminate public globals if they aren't referenced. Otherwise, we only eliminate private + // globals (prefixed with `$`) to avoid changing the meaning of the module code. + bool onlyPrivateGlobals = !ProgramConfig::IsRuntimeEffect(kind); + while (Transform::EliminateDeadGlobalVariables(this->context(), module, usage.get(), + onlyPrivateGlobals)) { + // Repeat until no changes occur. + } + + // We eliminate empty statements to avoid runs of `;;;;;;` caused by the previous passes. + SkSL::Transform::EliminateEmptyStatements(module); + + // Make sure that program usage is still correct after the optimization pass is complete. + SkASSERT(*usage == *Analysis::GetUsage(module)); + + return this->errorCount() == 0; +} + +bool Compiler::optimizeModuleAfterLoading(ProgramKind kind, Module& module) { + SkASSERT(this->errorCount() == 0); + +#ifndef SK_ENABLE_OPTIMIZE_SIZE + // Create a temporary program configuration with default settings. + ProgramConfig config; + config.fIsBuiltinCode = true; + config.fKind = kind; + AutoProgramConfig autoConfig(this->context(), &config); + + std::unique_ptr usage = Analysis::GetUsage(module); + + // Perform inline-candidate analysis and inline any functions deemed suitable. + Inliner inliner(fContext.get()); + while (this->errorCount() == 0) { + if (!this->runInliner(&inliner, module.fElements, module.fSymbols, usage.get())) { + break; + } + } + // Make sure that program usage is still correct after the optimization pass is complete. + SkASSERT(*usage == *Analysis::GetUsage(module)); +#endif + + return this->errorCount() == 0; +} + +bool Compiler::optimize(Program& program) { + // The optimizer only needs to run when it is enabled. + if (!program.fConfig->fSettings.fOptimize) { + return true; + } + + AutoShaderCaps autoCaps(fContext, fCaps); + + SkASSERT(!this->errorCount()); + if (this->errorCount() == 0) { +#ifndef SK_ENABLE_OPTIMIZE_SIZE + // Run the inliner only once; it is expensive! Multiple passes can occasionally shake out + // more wins, but it's diminishing returns. + Inliner inliner(fContext.get()); + this->runInliner(&inliner, program.fOwnedElements, program.fSymbols, program.fUsage.get()); +#endif + + // Unreachable code can confuse some drivers, so it's worth removing. (skia:12012) + Transform::EliminateUnreachableCode(program); + + while (Transform::EliminateDeadFunctions(program)) { + // Removing dead functions may cause more functions to become unreferenced. Try again. + } + while (Transform::EliminateDeadLocalVariables(program)) { + // Removing dead variables may cause more variables to become unreferenced. Try again. + } + while (Transform::EliminateDeadGlobalVariables(program)) { + // Repeat until no changes occur. + } + // Make sure that program usage is still correct after the optimization pass is complete. + SkASSERT(*program.usage() == *Analysis::GetUsage(program)); + } + + return this->errorCount() == 0; +} + +bool Compiler::runInliner(Inliner* inliner, + const std::vector>& elements, + std::shared_ptr symbols, + ProgramUsage* usage) { +#ifdef SK_ENABLE_OPTIMIZE_SIZE + return true; +#else + // The program's SymbolTable was taken out of fSymbolTable when the program was bundled, but + // the inliner relies (indirectly) on having a valid SymbolTable. + // In particular, inlining can turn a non-optimizable expression like `normalize(myVec)` into + // `normalize(vec2(7))`, which is now optimizable. The optimizer can use DSL to simplify this + // expression--e.g., in the case of normalize, using DSL's Length(). The DSL relies on + // convertIdentifier() to look up `length`. convertIdentifier() needs a valid symbol table to + // find the declaration of `length`. To allow this chain of events to succeed, we re-insert the + // program's symbol table temporarily. + SkASSERT(!fSymbolTable); + fSymbolTable = symbols; + + bool result = inliner->analyze(elements, symbols, usage); + + fSymbolTable = nullptr; + return result; +#endif +} + +bool Compiler::finalize(Program& program) { + AutoShaderCaps autoCaps(fContext, fCaps); + + // Copy all referenced built-in functions into the Program. + Transform::FindAndDeclareBuiltinFunctions(program); + + // Variables defined in the pre-includes need their declaring elements added to the program. + Transform::FindAndDeclareBuiltinVariables(program); + + // Do one last correctness-check pass. This looks for dangling FunctionReference/TypeReference + // expressions, and reports them as errors. + Analysis::DoFinalizationChecks(program); + + if (fContext->fConfig->strictES2Mode() && this->errorCount() == 0) { + // Enforce Appendix A, Section 5 of the GLSL ES 1.00 spec -- Indexing. This logic assumes + // that all loops meet the criteria of Section 4, and if they don't, could crash. + for (const auto& pe : program.fOwnedElements) { + Analysis::ValidateIndexingForES2(*pe, this->errorReporter()); + } + } + if (this->errorCount() == 0) { + bool enforceSizeLimit = ProgramConfig::IsRuntimeEffect(program.fConfig->fKind); + Analysis::CheckProgramStructure(program, enforceSizeLimit); + } + + // Make sure that program usage is still correct after finalization is complete. + SkASSERT(*program.usage() == *Analysis::GetUsage(program)); + + return this->errorCount() == 0; +} + +#if defined(SKSL_STANDALONE) || defined(SK_GANESH) || defined(SK_GRAPHITE) + +#if defined(SK_ENABLE_SPIRV_VALIDATION) +static bool validate_spirv(ErrorReporter& reporter, std::string_view program) { + SkASSERT(0 == program.size() % 4); + const uint32_t* programData = reinterpret_cast(program.data()); + size_t programSize = program.size() / 4; + + spvtools::SpirvTools tools(SPV_ENV_VULKAN_1_0); + std::string errors; + auto msgFn = [&errors](spv_message_level_t, const char*, const spv_position_t&, const char* m) { + errors += "SPIR-V validation error: "; + errors += m; + errors += '\n'; + }; + tools.SetMessageConsumer(msgFn); + + // Verify that the SPIR-V we produced is valid. At runtime, we will abort() with a message + // explaining the error. In standalone mode (skslc), we will send the message, plus the + // entire disassembled SPIR-V (for easier context & debugging) as *our* error message. + bool result = tools.Validate(programData, programSize); + if (!result) { +#if defined(SKSL_STANDALONE) + // Convert the string-stream to a SPIR-V disassembly. + std::string disassembly; + if (tools.Disassemble(programData, programSize, &disassembly)) { + errors.append(disassembly); + } + reporter.error(Position(), errors); +#else + SkDEBUGFAILF("%s", errors.c_str()); +#endif + } + return result; +} +#endif + +bool Compiler::toSPIRV(Program& program, OutputStream& out) { + TRACE_EVENT0("skia.shaders", "SkSL::Compiler::toSPIRV"); + AutoSource as(this, *program.fSource); + AutoShaderCaps autoCaps(fContext, fCaps); + ProgramSettings settings; + settings.fUseMemoryPool = false; + dsl::Start(this, program.fConfig->fKind, settings); + dsl::SetErrorReporter(&fErrorReporter); + fSymbolTable = program.fSymbols; +#ifdef SK_ENABLE_SPIRV_VALIDATION + StringStream buffer; + SPIRVCodeGenerator cg(fContext.get(), &program, &buffer); + bool result = cg.generateCode(); + + if (result && program.fConfig->fSettings.fValidateSPIRV) { + std::string_view binary = buffer.str(); + result = validate_spirv(this->errorReporter(), binary); + out.write(binary.data(), binary.size()); + } +#else + SPIRVCodeGenerator cg(fContext.get(), &program, &out); + bool result = cg.generateCode(); +#endif + dsl::End(); + return result; +} + +bool Compiler::toSPIRV(Program& program, std::string* out) { + StringStream buffer; + bool result = this->toSPIRV(program, buffer); + if (result) { + *out = buffer.str(); + } + return result; +} + +bool Compiler::toGLSL(Program& program, OutputStream& out) { + TRACE_EVENT0("skia.shaders", "SkSL::Compiler::toGLSL"); + AutoSource as(this, *program.fSource); + AutoShaderCaps autoCaps(fContext, fCaps); + GLSLCodeGenerator cg(fContext.get(), &program, &out); + bool result = cg.generateCode(); + return result; +} + +bool Compiler::toGLSL(Program& program, std::string* out) { + StringStream buffer; + bool result = this->toGLSL(program, buffer); + if (result) { + *out = buffer.str(); + } + return result; +} + +bool Compiler::toHLSL(Program& program, OutputStream& out) { + TRACE_EVENT0("skia.shaders", "SkSL::Compiler::toHLSL"); + std::string hlsl; + if (!this->toHLSL(program, &hlsl)) { + return false; + } + out.writeString(hlsl); + return true; +} + +bool Compiler::toHLSL(Program& program, std::string* out) { + std::string spirv; + if (!this->toSPIRV(program, &spirv)) { + return false; + } + + if (!SPIRVtoHLSL(spirv, out)) { + fErrorText += "HLSL cross-compilation not enabled"; + return false; + } + + return true; +} + +bool Compiler::toMetal(Program& program, OutputStream& out) { + TRACE_EVENT0("skia.shaders", "SkSL::Compiler::toMetal"); + AutoSource as(this, *program.fSource); + AutoShaderCaps autoCaps(fContext, fCaps); + MetalCodeGenerator cg(fContext.get(), &program, &out); + bool result = cg.generateCode(); + return result; +} + +bool Compiler::toMetal(Program& program, std::string* out) { + StringStream buffer; + bool result = this->toMetal(program, buffer); + if (result) { + *out = buffer.str(); + } + return result; +} + +#if defined(SK_ENABLE_WGSL_VALIDATION) +static bool validate_wgsl(ErrorReporter& reporter, const std::string& wgsl) { + tint::Source::File srcFile("", wgsl); + tint::Program program(tint::reader::wgsl::Parse(&srcFile)); + if (program.Diagnostics().count() > 0) { + tint::diag::Formatter diagFormatter; + std::string diagOutput = diagFormatter.format(program.Diagnostics()); +#if defined(SKSL_STANDALONE) + reporter.error(Position(), diagOutput); +#else + SkDEBUGFAILF("%s", diagOutput.c_str()); +#endif + return false; + } + return true; +} +#endif // defined(SK_ENABLE_WGSL_VALIDATION) + +bool Compiler::toWGSL(Program& program, OutputStream& out) { + TRACE_EVENT0("skia.shaders", "SkSL::Compiler::toWGSL"); + AutoSource as(this, *program.fSource); +#ifdef SK_ENABLE_WGSL_VALIDATION + StringStream wgsl; + WGSLCodeGenerator cg(fContext.get(), &program, &wgsl); + bool result = cg.generateCode(); + if (result) { + std::string wgslString = wgsl.str(); + result = validate_wgsl(this->errorReporter(), wgslString); + out.writeString(wgslString); + } +#else + WGSLCodeGenerator cg(fContext.get(), &program, &out); + bool result = cg.generateCode(); +#endif + return result; +} + +#endif // defined(SKSL_STANDALONE) || defined(SK_GANESH) || defined(SK_GRAPHITE) + +void Compiler::handleError(std::string_view msg, Position pos) { + fErrorText += "error: "; + bool printLocation = false; + std::string_view src = this->errorReporter().source(); + int line = -1; + if (pos.valid()) { + line = pos.line(src); + printLocation = pos.startOffset() < (int)src.length(); + fErrorText += std::to_string(line) + ": "; + } + fErrorText += std::string(msg) + "\n"; + if (printLocation) { + const int kMaxSurroundingChars = 100; + + // Find the beginning of the line. + int lineStart = pos.startOffset(); + while (lineStart > 0) { + if (src[lineStart - 1] == '\n') { + break; + } + --lineStart; + } + + // We don't want to show more than 100 characters surrounding the error, so push the line + // start forward and add a leading ellipsis if there would be more than this. + std::string lineText; + std::string caretText; + if ((pos.startOffset() - lineStart) > kMaxSurroundingChars) { + lineStart = pos.startOffset() - kMaxSurroundingChars; + lineText = "..."; + caretText = " "; + } + + // Echo the line. Again, we don't want to show more than 100 characters after the end of the + // error, so truncate with a trailing ellipsis if needed. + const char* lineSuffix = "...\n"; + int lineStop = pos.endOffset() + kMaxSurroundingChars; + if (lineStop >= (int)src.length()) { + lineStop = src.length() - 1; + lineSuffix = "\n"; // no ellipsis if we reach end-of-file + } + for (int i = lineStart; i < lineStop; ++i) { + char c = src[i]; + if (c == '\n') { + lineSuffix = "\n"; // no ellipsis if we reach end-of-line + break; + } + switch (c) { + case '\t': lineText += " "; break; + case '\0': lineText += " "; break; + default: lineText += src[i]; break; + } + } + fErrorText += lineText + lineSuffix; + + // print the carets underneath it, pointing to the range in question + for (int i = lineStart; i < (int)src.length(); i++) { + if (i >= pos.endOffset()) { + break; + } + switch (src[i]) { + case '\t': + caretText += (i >= pos.startOffset()) ? "^^^^" : " "; + break; + case '\n': + SkASSERT(i >= pos.startOffset()); + // use an ellipsis if the error continues past the end of the line + caretText += (pos.endOffset() > i + 1) ? "..." : "^"; + i = src.length(); + break; + default: + caretText += (i >= pos.startOffset()) ? '^' : ' '; + break; + } + } + fErrorText += caretText + '\n'; + } +} + +std::string Compiler::errorText(bool showCount) { + if (showCount) { + this->writeErrorCount(); + } + std::string result = fErrorText; + this->resetErrors(); + return result; +} + +void Compiler::writeErrorCount() { + int count = this->errorCount(); + if (count) { + fErrorText += std::to_string(count) + " error"; + if (count > 1) { + fErrorText += "s"; + } + fErrorText += "\n"; + } +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLCompiler.h b/gfx/skia/skia/src/sksl/SkSLCompiler.h new file mode 100644 index 0000000000..382c69609b --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLCompiler.h @@ -0,0 +1,242 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_COMPILER +#define SKSL_COMPILER + +#include "include/core/SkSize.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLProgramElement.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLContext.h" // IWYU pragma: keep + +#include +#include +#include +#include +#include +#include +#include + +#define SK_FRAGCOLOR_BUILTIN 10001 +#define SK_LASTFRAGCOLOR_BUILTIN 10008 +#define SK_MAIN_COORDS_BUILTIN 10009 +#define SK_INPUT_COLOR_BUILTIN 10010 +#define SK_DEST_COLOR_BUILTIN 10011 +#define SK_SECONDARYFRAGCOLOR_BUILTIN 10012 +#define SK_FRAGCOORD_BUILTIN 15 +#define SK_CLOCKWISE_BUILTIN 17 + +#define SK_VERTEXID_BUILTIN 42 +#define SK_INSTANCEID_BUILTIN 43 +#define SK_POSITION_BUILTIN 0 +#define SK_POINTSIZE_BUILTIN 1 + +#define SK_NUMWORKGROUPS_BUILTIN 24 +#define SK_WORKGROUPID_BUILTIN 26 +#define SK_LOCALINVOCATIONID_BUILTIN 27 +#define SK_GLOBALINVOCATIONID_BUILTIN 28 +#define SK_LOCALINVOCATIONINDEX_BUILTIN 29 + +namespace SkSL { + +namespace dsl { + class DSLCore; +} + +class Expression; +class Inliner; +class ModifiersPool; +class OutputStream; +class ProgramUsage; +class SymbolTable; +enum class ProgramKind : int8_t; +struct Program; +struct ProgramSettings; +struct ShaderCaps; + +struct Module { + const Module* fParent = nullptr; + std::shared_ptr fSymbols; + std::vector> fElements; +}; + +/** + * Main compiler entry point. The compiler parses the SkSL text directly into a tree of IRNodes, + * while performing basic optimizations such as constant-folding and dead-code elimination. Then the + * Program is passed into a CodeGenerator to produce compiled output. + * + * See the README for information about SkSL. + */ +class SK_API Compiler { +public: + inline static constexpr const char FRAGCOLOR_NAME[] = "sk_FragColor"; + inline static constexpr const char RTADJUST_NAME[] = "sk_RTAdjust"; + inline static constexpr const char POSITION_NAME[] = "sk_Position"; + inline static constexpr const char POISON_TAG[] = ""; + + /** + * Gets a float4 that adjusts the position from Skia device coords to normalized device coords, + * used to populate sk_RTAdjust. Assuming the transformed position, pos, is a homogeneous + * float4, the vec, v, is applied as such: + * float4((pos.xy * v.xz) + sk_Position.ww * v.yw, 0, pos.w); + */ + static std::array GetRTAdjustVector(SkISize rtDims, bool flipY) { + std::array result; + result[0] = 2.f/rtDims.width(); + result[2] = 2.f/rtDims.height(); + result[1] = -1.f; + result[3] = -1.f; + if (flipY) { + result[2] = -result[2]; + result[3] = -result[3]; + } + return result; + } + + /** + * Uniform values used by the compiler to implement origin-neutral dFdy, sk_Clockwise, and + * sk_FragCoord. + */ + static std::array GetRTFlipVector(int rtHeight, bool flipY) { + std::array result; + result[0] = flipY ? rtHeight : 0.f; + result[1] = flipY ? -1.f : 1.f; + return result; + } + + Compiler(const ShaderCaps* caps); + + ~Compiler(); + + Compiler(const Compiler&) = delete; + Compiler& operator=(const Compiler&) = delete; + + /** + * Allows optimization settings to be unilaterally overridden. This is meant to allow tools like + * Viewer or Nanobench to override the compiler's ProgramSettings and ShaderCaps for debugging. + */ + enum class OverrideFlag { + kDefault, + kOff, + kOn, + }; + static void EnableOptimizer(OverrideFlag flag) { sOptimizer = flag; } + static void EnableInliner(OverrideFlag flag) { sInliner = flag; } + + std::unique_ptr convertProgram(ProgramKind kind, + std::string text, + ProgramSettings settings); + + std::unique_ptr convertIdentifier(Position pos, std::string_view name); + + bool toSPIRV(Program& program, OutputStream& out); + + bool toSPIRV(Program& program, std::string* out); + + bool toGLSL(Program& program, OutputStream& out); + + bool toGLSL(Program& program, std::string* out); + + bool toHLSL(Program& program, OutputStream& out); + + bool toHLSL(Program& program, std::string* out); + + bool toMetal(Program& program, OutputStream& out); + + bool toMetal(Program& program, std::string* out); + + bool toWGSL(Program& program, OutputStream& out); + + void handleError(std::string_view msg, Position pos); + + std::string errorText(bool showCount = true); + + ErrorReporter& errorReporter() { return *fContext->fErrors; } + + int errorCount() const { return fContext->fErrors->errorCount(); } + + void writeErrorCount(); + + void resetErrors() { + fErrorText.clear(); + this->errorReporter().resetErrorCount(); + } + + Context& context() const { + return *fContext; + } + + std::shared_ptr& symbolTable() { + return fSymbolTable; + } + + std::unique_ptr compileModule(ProgramKind kind, + const char* moduleName, + std::string moduleSource, + const Module* parent, + ModifiersPool& modifiersPool, + bool shouldInline); + + /** Optimize a module at minification time, before writing it out. */ + bool optimizeModuleBeforeMinifying(ProgramKind kind, Module& module); + + const Module* moduleForProgramKind(ProgramKind kind); + +private: + class CompilerErrorReporter : public ErrorReporter { + public: + CompilerErrorReporter(Compiler* compiler) + : fCompiler(*compiler) {} + + void handleError(std::string_view msg, Position pos) override { + fCompiler.handleError(msg, pos); + } + + private: + Compiler& fCompiler; + }; + + /** Updates ProgramSettings to eliminate contradictions and to honor the ProgramKind. */ + static void FinalizeSettings(ProgramSettings* settings, ProgramKind kind); + + /** Optimize every function in the program. */ + bool optimize(Program& program); + + /** Performs final checks to confirm that a fully-assembled/optimized is valid. */ + bool finalize(Program& program); + + /** Optimize a module at Skia runtime, after loading it. */ + bool optimizeModuleAfterLoading(ProgramKind kind, Module& module); + + /** Flattens out function calls when it is safe to do so. */ + bool runInliner(Inliner* inliner, + const std::vector>& elements, + std::shared_ptr symbols, + ProgramUsage* usage); + + CompilerErrorReporter fErrorReporter; + std::shared_ptr fContext; + const ShaderCaps* fCaps; + + // This is the current symbol table of the code we are processing, and therefore changes during + // compilation + std::shared_ptr fSymbolTable; + + std::string fErrorText; + + static OverrideFlag sOptimizer; + static OverrideFlag sInliner; + + friend class ThreadContext; + friend class dsl::DSLCore; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLConstantFolder.cpp b/gfx/skia/skia/src/sksl/SkSLConstantFolder.cpp new file mode 100644 index 0000000000..76cf7f820a --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLConstantFolder.cpp @@ -0,0 +1,884 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLConstantFolder.h" + +#include "include/core/SkTypes.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLConstructorCompound.h" +#include "src/sksl/ir/SkSLConstructorDiagonalMatrix.h" +#include "src/sksl/ir/SkSLConstructorSplat.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLLiteral.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +#include +#include +#include +#include +#include +#include + +namespace SkSL { + +static bool is_vec_or_mat(const Type& type) { + switch (type.typeKind()) { + case Type::TypeKind::kMatrix: + case Type::TypeKind::kVector: + return true; + + default: + return false; + } +} + +static std::unique_ptr eliminate_no_op_boolean(Position pos, + const Expression& left, + Operator op, + const Expression& right) { + bool rightVal = right.as().boolValue(); + + // Detect no-op Boolean expressions and optimize them away. + if ((op.kind() == Operator::Kind::LOGICALAND && rightVal) || // (expr && true) -> (expr) + (op.kind() == Operator::Kind::LOGICALOR && !rightVal) || // (expr || false) -> (expr) + (op.kind() == Operator::Kind::LOGICALXOR && !rightVal) || // (expr ^^ false) -> (expr) + (op.kind() == Operator::Kind::EQEQ && rightVal) || // (expr == true) -> (expr) + (op.kind() == Operator::Kind::NEQ && !rightVal)) { // (expr != false) -> (expr) + + return left.clone(pos); + } + + return nullptr; +} + +static std::unique_ptr short_circuit_boolean(Position pos, + const Expression& left, + Operator op, + const Expression& right) { + bool leftVal = left.as().boolValue(); + + // When the literal is on the left, we can sometimes eliminate the other expression entirely. + if ((op.kind() == Operator::Kind::LOGICALAND && !leftVal) || // (false && expr) -> (false) + (op.kind() == Operator::Kind::LOGICALOR && leftVal)) { // (true || expr) -> (true) + + return left.clone(pos); + } + + // We can't eliminate the right-side expression via short-circuit, but we might still be able to + // simplify away a no-op expression. + return eliminate_no_op_boolean(pos, right, op, left); +} + +static std::unique_ptr simplify_constant_equality(const Context& context, + Position pos, + const Expression& left, + Operator op, + const Expression& right) { + if (op.kind() == Operator::Kind::EQEQ || op.kind() == Operator::Kind::NEQ) { + bool equality = (op.kind() == Operator::Kind::EQEQ); + + switch (left.compareConstant(right)) { + case Expression::ComparisonResult::kNotEqual: + equality = !equality; + [[fallthrough]]; + + case Expression::ComparisonResult::kEqual: + return Literal::MakeBool(context, pos, equality); + + case Expression::ComparisonResult::kUnknown: + break; + } + } + return nullptr; +} + +static std::unique_ptr simplify_matrix_multiplication(const Context& context, + Position pos, + const Expression& left, + const Expression& right, + int leftColumns, + int leftRows, + int rightColumns, + int rightRows) { + const Type& componentType = left.type().componentType(); + SkASSERT(componentType.matches(right.type().componentType())); + + // Fetch the left matrix. + double leftVals[4][4]; + for (int c = 0; c < leftColumns; ++c) { + for (int r = 0; r < leftRows; ++r) { + leftVals[c][r] = *left.getConstantValue((c * leftRows) + r); + } + } + // Fetch the right matrix. + double rightVals[4][4]; + for (int c = 0; c < rightColumns; ++c) { + for (int r = 0; r < rightRows; ++r) { + rightVals[c][r] = *right.getConstantValue((c * rightRows) + r); + } + } + + SkASSERT(leftColumns == rightRows); + int outColumns = rightColumns, + outRows = leftRows; + + ExpressionArray args; + args.reserve_back(outColumns * outRows); + for (int c = 0; c < outColumns; ++c) { + for (int r = 0; r < outRows; ++r) { + // Compute a dot product for this position. + double val = 0; + for (int dotIdx = 0; dotIdx < leftColumns; ++dotIdx) { + val += leftVals[dotIdx][r] * rightVals[c][dotIdx]; + } + args.push_back(Literal::Make(pos, val, &componentType)); + } + } + + if (outColumns == 1) { + // Matrix-times-vector conceptually makes a 1-column N-row matrix, but we return vecN. + std::swap(outColumns, outRows); + } + + const Type& resultType = componentType.toCompound(context, outColumns, outRows); + return ConstructorCompound::Make(context, pos, resultType, std::move(args)); +} + +static std::unique_ptr simplify_matrix_times_matrix(const Context& context, + Position pos, + const Expression& left, + const Expression& right) { + const Type& leftType = left.type(); + const Type& rightType = right.type(); + + SkASSERT(leftType.isMatrix()); + SkASSERT(rightType.isMatrix()); + + return simplify_matrix_multiplication(context, pos, left, right, + leftType.columns(), leftType.rows(), + rightType.columns(), rightType.rows()); +} + +static std::unique_ptr simplify_vector_times_matrix(const Context& context, + Position pos, + const Expression& left, + const Expression& right) { + const Type& leftType = left.type(); + const Type& rightType = right.type(); + + SkASSERT(leftType.isVector()); + SkASSERT(rightType.isMatrix()); + + return simplify_matrix_multiplication(context, pos, left, right, + /*leftColumns=*/leftType.columns(), /*leftRows=*/1, + rightType.columns(), rightType.rows()); +} + +static std::unique_ptr simplify_matrix_times_vector(const Context& context, + Position pos, + const Expression& left, + const Expression& right) { + const Type& leftType = left.type(); + const Type& rightType = right.type(); + + SkASSERT(leftType.isMatrix()); + SkASSERT(rightType.isVector()); + + return simplify_matrix_multiplication(context, pos, left, right, + leftType.columns(), leftType.rows(), + /*rightColumns=*/1, /*rightRows=*/rightType.columns()); +} + +static std::unique_ptr simplify_componentwise(const Context& context, + Position pos, + const Expression& left, + Operator op, + const Expression& right) { + SkASSERT(is_vec_or_mat(left.type())); + SkASSERT(left.type().matches(right.type())); + const Type& type = left.type(); + + // Handle equality operations: == != + if (std::unique_ptr result = simplify_constant_equality(context, pos, left, op, + right)) { + return result; + } + + // Handle floating-point arithmetic: + - * / + using FoldFn = double (*)(double, double); + FoldFn foldFn; + switch (op.kind()) { + case Operator::Kind::PLUS: foldFn = +[](double a, double b) { return a + b; }; break; + case Operator::Kind::MINUS: foldFn = +[](double a, double b) { return a - b; }; break; + case Operator::Kind::STAR: foldFn = +[](double a, double b) { return a * b; }; break; + case Operator::Kind::SLASH: foldFn = +[](double a, double b) { return a / b; }; break; + default: + return nullptr; + } + + const Type& componentType = type.componentType(); + SkASSERT(componentType.isNumber()); + + double minimumValue = componentType.minimumValue(); + double maximumValue = componentType.maximumValue(); + + ExpressionArray args; + int numSlots = type.slotCount(); + args.reserve_back(numSlots); + for (int i = 0; i < numSlots; i++) { + double value = foldFn(*left.getConstantValue(i), *right.getConstantValue(i)); + if (value < minimumValue || value > maximumValue) { + return nullptr; + } + + args.push_back(Literal::Make(pos, value, &componentType)); + } + return ConstructorCompound::Make(context, pos, type, std::move(args)); +} + +static std::unique_ptr splat_scalar(const Context& context, + const Expression& scalar, + const Type& type) { + if (type.isVector()) { + return ConstructorSplat::Make(context, scalar.fPosition, type, scalar.clone()); + } + if (type.isMatrix()) { + int numSlots = type.slotCount(); + ExpressionArray splatMatrix; + splatMatrix.reserve_back(numSlots); + for (int index = 0; index < numSlots; ++index) { + splatMatrix.push_back(scalar.clone()); + } + return ConstructorCompound::Make(context, scalar.fPosition, type, std::move(splatMatrix)); + } + SkDEBUGFAILF("unsupported type %s", type.description().c_str()); + return nullptr; +} + +static std::unique_ptr cast_expression(const Context& context, + Position pos, + const Expression& expr, + const Type& type) { + SkASSERT(type.componentType().matches(expr.type().componentType())); + if (expr.type().isScalar()) { + if (type.isMatrix()) { + return ConstructorDiagonalMatrix::Make(context, pos, type, expr.clone()); + } + if (type.isVector()) { + return ConstructorSplat::Make(context, pos, type, expr.clone()); + } + } + if (type.matches(expr.type())) { + return expr.clone(pos); + } + // We can't cast matrices into vectors or vice-versa. + return nullptr; +} + +static std::unique_ptr zero_expression(const Context& context, + Position pos, + const Type& type) { + std::unique_ptr zero = Literal::Make(pos, 0.0, &type.componentType()); + if (type.isScalar()) { + return zero; + } + if (type.isVector()) { + return ConstructorSplat::Make(context, pos, type, std::move(zero)); + } + if (type.isMatrix()) { + return ConstructorDiagonalMatrix::Make(context, pos, type, std::move(zero)); + } + SkDEBUGFAILF("unsupported type %s", type.description().c_str()); + return nullptr; +} + +static std::unique_ptr negate_expression(const Context& context, + Position pos, + const Expression& expr, + const Type& type) { + std::unique_ptr ctor = cast_expression(context, pos, expr, type); + return ctor ? PrefixExpression::Make(context, pos, Operator::Kind::MINUS, std::move(ctor)) + : nullptr; +} + +bool ConstantFolder::GetConstantInt(const Expression& value, SKSL_INT* out) { + const Expression* expr = GetConstantValueForVariable(value); + if (!expr->isIntLiteral()) { + return false; + } + *out = expr->as().intValue(); + return true; +} + +bool ConstantFolder::GetConstantValue(const Expression& value, double* out) { + const Expression* expr = GetConstantValueForVariable(value); + if (!expr->is()) { + return false; + } + *out = expr->as().value(); + return true; +} + +static bool contains_constant_zero(const Expression& expr) { + int numSlots = expr.type().slotCount(); + for (int index = 0; index < numSlots; ++index) { + std::optional slotVal = expr.getConstantValue(index); + if (slotVal.has_value() && *slotVal == 0.0) { + return true; + } + } + return false; +} + +// Returns true if the expression contains `value` in every slot. +static bool is_constant_splat(const Expression& expr, double value) { + int numSlots = expr.type().slotCount(); + for (int index = 0; index < numSlots; ++index) { + std::optional slotVal = expr.getConstantValue(index); + if (!slotVal.has_value() || *slotVal != value) { + return false; + } + } + return true; +} + +// Returns true if the expression is a square diagonal matrix containing `value`. +static bool is_constant_diagonal(const Expression& expr, double value) { + SkASSERT(expr.type().isMatrix()); + int columns = expr.type().columns(); + int rows = expr.type().rows(); + if (columns != rows) { + return false; + } + int slotIdx = 0; + for (int c = 0; c < columns; ++c) { + for (int r = 0; r < rows; ++r) { + double expectation = (c == r) ? value : 0; + std::optional slotVal = expr.getConstantValue(slotIdx++); + if (!slotVal.has_value() || *slotVal != expectation) { + return false; + } + } + } + return true; +} + +// Returns true if the expression is a scalar, vector, or diagonal matrix containing `value`. +static bool is_constant_value(const Expression& expr, double value) { + return expr.type().isMatrix() ? is_constant_diagonal(expr, value) + : is_constant_splat(expr, value); +} + +// The expression represents the right-hand side of a division op. If the division can be +// strength-reduced into multiplication by a reciprocal, returns that reciprocal as an expression. +// Note that this only supports literal values with safe-to-use reciprocals, and returns null if +// Expression contains anything else. +static std::unique_ptr make_reciprocal_expression(const Context& context, + const Expression& right) { + if (right.type().isMatrix() || !right.type().componentType().isFloat()) { + return nullptr; + } + // Verify that each slot contains a finite, non-zero literal, take its reciprocal. + int nslots = right.type().slotCount(); + SkSTArray<4, double> values; + for (int index = 0; index < nslots; ++index) { + std::optional value = right.getConstantValue(index); + if (!value) { + return nullptr; + } + *value = sk_ieee_double_divide(1.0, *value); + if (*value >= -FLT_MAX && *value <= FLT_MAX && *value != 0.0) { + // The reciprocal can be represented safely as a finite 32-bit float. + values.push_back(*value); + } else { + // The value is outside the 32-bit float range, or is NaN; do not optimize. + return nullptr; + } + } + // Convert our reciprocal values to Literals. + ExpressionArray exprs; + exprs.reserve_back(nslots); + for (double value : values) { + exprs.push_back(Literal::Make(right.fPosition, value, &right.type().componentType())); + } + // Turn the expression array into a compound constructor. (If this is a single-slot expression, + // this will return the literal as-is.) + return ConstructorCompound::Make(context, right.fPosition, right.type(), std::move(exprs)); +} + +static bool error_on_divide_by_zero(const Context& context, Position pos, Operator op, + const Expression& right) { + switch (op.kind()) { + case Operator::Kind::SLASH: + case Operator::Kind::SLASHEQ: + case Operator::Kind::PERCENT: + case Operator::Kind::PERCENTEQ: + if (contains_constant_zero(right)) { + context.fErrors->error(pos, "division by zero"); + return true; + } + return false; + default: + return false; + } +} + +const Expression* ConstantFolder::GetConstantValueOrNullForVariable(const Expression& inExpr) { + for (const Expression* expr = &inExpr;;) { + if (!expr->is()) { + break; + } + const VariableReference& varRef = expr->as(); + if (varRef.refKind() != VariableRefKind::kRead) { + break; + } + const Variable& var = *varRef.variable(); + if (!(var.modifiers().fFlags & Modifiers::kConst_Flag)) { + break; + } + expr = var.initialValue(); + if (!expr) { + // Function parameters can be const but won't have an initial value. + break; + } + if (Analysis::IsCompileTimeConstant(*expr)) { + return expr; + } + } + // We didn't find a compile-time constant at the end. + return nullptr; +} + +const Expression* ConstantFolder::GetConstantValueForVariable(const Expression& inExpr) { + const Expression* expr = GetConstantValueOrNullForVariable(inExpr); + return expr ? expr : &inExpr; +} + +std::unique_ptr ConstantFolder::MakeConstantValueForVariable( + Position pos, std::unique_ptr inExpr) { + const Expression* expr = GetConstantValueOrNullForVariable(*inExpr); + return expr ? expr->clone(pos) : std::move(inExpr); +} + +static bool is_scalar_op_matrix(const Expression& left, const Expression& right) { + return left.type().isScalar() && right.type().isMatrix(); +} + +static bool is_matrix_op_scalar(const Expression& left, const Expression& right) { + return is_scalar_op_matrix(right, left); +} + +static std::unique_ptr simplify_arithmetic(const Context& context, + Position pos, + const Expression& left, + Operator op, + const Expression& right, + const Type& resultType) { + switch (op.kind()) { + case Operator::Kind::PLUS: + if (!is_scalar_op_matrix(left, right) && is_constant_splat(right, 0.0)) { // x + 0 + if (std::unique_ptr expr = cast_expression(context, pos, left, + resultType)) { + return expr; + } + } + if (!is_matrix_op_scalar(left, right) && is_constant_splat(left, 0.0)) { // 0 + x + if (std::unique_ptr expr = cast_expression(context, pos, right, + resultType)) { + return expr; + } + } + break; + + case Operator::Kind::STAR: + if (is_constant_value(right, 1.0)) { // x * 1 + if (std::unique_ptr expr = cast_expression(context, pos, left, + resultType)) { + return expr; + } + } + if (is_constant_value(left, 1.0)) { // 1 * x + if (std::unique_ptr expr = cast_expression(context, pos, right, + resultType)) { + return expr; + } + } + if (is_constant_value(right, 0.0) && !Analysis::HasSideEffects(left)) { // x * 0 + return zero_expression(context, pos, resultType); + } + if (is_constant_value(left, 0.0) && !Analysis::HasSideEffects(right)) { // 0 * x + return zero_expression(context, pos, resultType); + } + if (is_constant_value(right, -1.0)) { // x * -1 (to `-x`) + if (std::unique_ptr expr = negate_expression(context, pos, left, + resultType)) { + return expr; + } + } + if (is_constant_value(left, -1.0)) { // -1 * x (to `-x`) + if (std::unique_ptr expr = negate_expression(context, pos, right, + resultType)) { + return expr; + } + } + break; + + case Operator::Kind::MINUS: + if (!is_scalar_op_matrix(left, right) && is_constant_splat(right, 0.0)) { // x - 0 + if (std::unique_ptr expr = cast_expression(context, pos, left, + resultType)) { + return expr; + } + } + if (!is_matrix_op_scalar(left, right) && is_constant_splat(left, 0.0)) { // 0 - x + if (std::unique_ptr expr = negate_expression(context, pos, right, + resultType)) { + return expr; + } + } + break; + + case Operator::Kind::SLASH: + if (!is_scalar_op_matrix(left, right) && is_constant_splat(right, 1.0)) { // x / 1 + if (std::unique_ptr expr = cast_expression(context, pos, left, + resultType)) { + return expr; + } + } + if (!left.type().isMatrix()) { // convert `x / 2` into `x * 0.5` + if (std::unique_ptr expr = make_reciprocal_expression(context, right)) { + return BinaryExpression::Make(context, pos, left.clone(), Operator::Kind::STAR, + std::move(expr)); + } + } + break; + + case Operator::Kind::PLUSEQ: + case Operator::Kind::MINUSEQ: + if (is_constant_splat(right, 0.0)) { // x += 0, x -= 0 + if (std::unique_ptr var = cast_expression(context, pos, left, + resultType)) { + Analysis::UpdateVariableRefKind(var.get(), VariableRefKind::kRead); + return var; + } + } + break; + + case Operator::Kind::STAREQ: + if (is_constant_value(right, 1.0)) { // x *= 1 + if (std::unique_ptr var = cast_expression(context, pos, left, + resultType)) { + Analysis::UpdateVariableRefKind(var.get(), VariableRefKind::kRead); + return var; + } + } + break; + + case Operator::Kind::SLASHEQ: + if (is_constant_splat(right, 1.0)) { // x /= 1 + if (std::unique_ptr var = cast_expression(context, pos, left, + resultType)) { + Analysis::UpdateVariableRefKind(var.get(), VariableRefKind::kRead); + return var; + } + } + if (std::unique_ptr expr = make_reciprocal_expression(context, right)) { + return BinaryExpression::Make(context, pos, left.clone(), Operator::Kind::STAREQ, + std::move(expr)); + } + break; + + default: + break; + } + + return nullptr; +} + +// The expression must be scalar, and represents the right-hand side of a division op. It can +// contain anything, not just literal values. This returns the binary expression `1.0 / expr`. The +// expression might be further simplified by the constant folding, if possible. +static std::unique_ptr one_over_scalar(const Context& context, + const Expression& right) { + SkASSERT(right.type().isScalar()); + Position pos = right.fPosition; + return BinaryExpression::Make(context, pos, + Literal::Make(pos, 1.0, &right.type()), + Operator::Kind::SLASH, + right.clone()); +} + +static std::unique_ptr simplify_matrix_division(const Context& context, + Position pos, + const Expression& left, + Operator op, + const Expression& right, + const Type& resultType) { + // Convert matrix-over-scalar `x /= y` into `x *= (1.0 / y)`. This generates better + // code in SPIR-V and Metal, and should be roughly equivalent elsewhere. + switch (op.kind()) { + case OperatorKind::SLASH: + case OperatorKind::SLASHEQ: + if (left.type().isMatrix() && right.type().isScalar()) { + Operator multiplyOp = op.isAssignment() ? OperatorKind::STAREQ + : OperatorKind::STAR; + return BinaryExpression::Make(context, pos, + left.clone(), + multiplyOp, + one_over_scalar(context, right)); + } + break; + + default: + break; + } + + return nullptr; +} + +static std::unique_ptr fold_expression(Position pos, + double result, + const Type* resultType) { + if (resultType->isNumber()) { + if (result >= resultType->minimumValue() && result <= resultType->maximumValue()) { + // This result will fit inside its type. + } else { + // The value is outside the range or is NaN (all if-checks fail); do not optimize. + return nullptr; + } + } + + return Literal::Make(pos, result, resultType); +} + +std::unique_ptr ConstantFolder::Simplify(const Context& context, + Position pos, + const Expression& leftExpr, + Operator op, + const Expression& rightExpr, + const Type& resultType) { + // Replace constant variables with their literal values. + const Expression* left = GetConstantValueForVariable(leftExpr); + const Expression* right = GetConstantValueForVariable(rightExpr); + + // If this is the assignment operator, and both sides are the same trivial expression, this is + // self-assignment (i.e., `var = var`) and can be reduced to just a variable reference (`var`). + // This can happen when other parts of the assignment are optimized away. + if (op.kind() == Operator::Kind::EQ && Analysis::IsSameExpressionTree(*left, *right)) { + return right->clone(pos); + } + + // Simplify the expression when both sides are constant Boolean literals. + if (left->isBoolLiteral() && right->isBoolLiteral()) { + bool leftVal = left->as().boolValue(); + bool rightVal = right->as().boolValue(); + bool result; + switch (op.kind()) { + case Operator::Kind::LOGICALAND: result = leftVal && rightVal; break; + case Operator::Kind::LOGICALOR: result = leftVal || rightVal; break; + case Operator::Kind::LOGICALXOR: result = leftVal ^ rightVal; break; + case Operator::Kind::EQEQ: result = leftVal == rightVal; break; + case Operator::Kind::NEQ: result = leftVal != rightVal; break; + default: return nullptr; + } + return Literal::MakeBool(context, pos, result); + } + + // If the left side is a Boolean literal, apply short-circuit optimizations. + if (left->isBoolLiteral()) { + return short_circuit_boolean(pos, *left, op, *right); + } + + // If the right side is a Boolean literal... + if (right->isBoolLiteral()) { + // ... and the left side has no side effects... + if (!Analysis::HasSideEffects(*left)) { + // We can reverse the expressions and short-circuit optimizations are still valid. + return short_circuit_boolean(pos, *right, op, *left); + } + + // We can't use short-circuiting, but we can still optimize away no-op Boolean expressions. + return eliminate_no_op_boolean(pos, *left, op, *right); + } + + if (op.kind() == Operator::Kind::EQEQ && Analysis::IsSameExpressionTree(*left, *right)) { + // With == comparison, if both sides are the same trivial expression, this is self- + // comparison and is always true. (We are not concerned with NaN.) + return Literal::MakeBool(context, pos, /*value=*/true); + } + + if (op.kind() == Operator::Kind::NEQ && Analysis::IsSameExpressionTree(*left, *right)) { + // With != comparison, if both sides are the same trivial expression, this is self- + // comparison and is always false. (We are not concerned with NaN.) + return Literal::MakeBool(context, pos, /*value=*/false); + } + + if (error_on_divide_by_zero(context, pos, op, *right)) { + return nullptr; + } + + // Perform full constant folding when both sides are compile-time constants. + const Type& leftType = left->type(); + const Type& rightType = right->type(); + bool leftSideIsConstant = Analysis::IsCompileTimeConstant(*left); + bool rightSideIsConstant = Analysis::IsCompileTimeConstant(*right); + + if (leftSideIsConstant && rightSideIsConstant) { + // Handle pairs of integer literals. + if (left->isIntLiteral() && right->isIntLiteral()) { + using SKSL_UINT = uint64_t; + SKSL_INT leftVal = left->as().intValue(); + SKSL_INT rightVal = right->as().intValue(); + + // Note that fold_expression returns null if the result would overflow its type. + #define RESULT(Op) fold_expression(pos, (SKSL_INT)(leftVal) Op \ + (SKSL_INT)(rightVal), &resultType) + #define URESULT(Op) fold_expression(pos, (SKSL_INT)((SKSL_UINT)(leftVal) Op \ + (SKSL_UINT)(rightVal)), &resultType) + switch (op.kind()) { + case Operator::Kind::PLUS: return URESULT(+); + case Operator::Kind::MINUS: return URESULT(-); + case Operator::Kind::STAR: return URESULT(*); + case Operator::Kind::SLASH: + if (leftVal == std::numeric_limits::min() && rightVal == -1) { + context.fErrors->error(pos, "arithmetic overflow"); + return nullptr; + } + return RESULT(/); + case Operator::Kind::PERCENT: + if (leftVal == std::numeric_limits::min() && rightVal == -1) { + context.fErrors->error(pos, "arithmetic overflow"); + return nullptr; + } + return RESULT(%); + case Operator::Kind::BITWISEAND: return RESULT(&); + case Operator::Kind::BITWISEOR: return RESULT(|); + case Operator::Kind::BITWISEXOR: return RESULT(^); + case Operator::Kind::EQEQ: return RESULT(==); + case Operator::Kind::NEQ: return RESULT(!=); + case Operator::Kind::GT: return RESULT(>); + case Operator::Kind::GTEQ: return RESULT(>=); + case Operator::Kind::LT: return RESULT(<); + case Operator::Kind::LTEQ: return RESULT(<=); + case Operator::Kind::SHL: + if (rightVal >= 0 && rightVal <= 31) { + // Left-shifting a negative (or really, any signed) value is undefined + // behavior in C++, but not in GLSL. Do the shift on unsigned values to avoid + // triggering an UBSAN error. + return URESULT(<<); + } + context.fErrors->error(pos, "shift value out of range"); + return nullptr; + case Operator::Kind::SHR: + if (rightVal >= 0 && rightVal <= 31) { + return RESULT(>>); + } + context.fErrors->error(pos, "shift value out of range"); + return nullptr; + + default: + return nullptr; + } + #undef RESULT + #undef URESULT + } + + // Handle pairs of floating-point literals. + if (left->isFloatLiteral() && right->isFloatLiteral()) { + SKSL_FLOAT leftVal = left->as().floatValue(); + SKSL_FLOAT rightVal = right->as().floatValue(); + + #define RESULT(Op) fold_expression(pos, leftVal Op rightVal, &resultType) + switch (op.kind()) { + case Operator::Kind::PLUS: return RESULT(+); + case Operator::Kind::MINUS: return RESULT(-); + case Operator::Kind::STAR: return RESULT(*); + case Operator::Kind::SLASH: return RESULT(/); + case Operator::Kind::EQEQ: return RESULT(==); + case Operator::Kind::NEQ: return RESULT(!=); + case Operator::Kind::GT: return RESULT(>); + case Operator::Kind::GTEQ: return RESULT(>=); + case Operator::Kind::LT: return RESULT(<); + case Operator::Kind::LTEQ: return RESULT(<=); + default: return nullptr; + } + #undef RESULT + } + + // Perform matrix multiplication. + if (op.kind() == Operator::Kind::STAR) { + if (leftType.isMatrix() && rightType.isMatrix()) { + return simplify_matrix_times_matrix(context, pos, *left, *right); + } + if (leftType.isVector() && rightType.isMatrix()) { + return simplify_vector_times_matrix(context, pos, *left, *right); + } + if (leftType.isMatrix() && rightType.isVector()) { + return simplify_matrix_times_vector(context, pos, *left, *right); + } + } + + // Perform constant folding on pairs of vectors/matrices. + if (is_vec_or_mat(leftType) && leftType.matches(rightType)) { + return simplify_componentwise(context, pos, *left, op, *right); + } + + // Perform constant folding on vectors/matrices against scalars, e.g.: half4(2) + 2 + if (rightType.isScalar() && is_vec_or_mat(leftType) && + leftType.componentType().matches(rightType)) { + return simplify_componentwise(context, pos, + *left, op, *splat_scalar(context, *right, left->type())); + } + + // Perform constant folding on scalars against vectors/matrices, e.g.: 2 + half4(2) + if (leftType.isScalar() && is_vec_or_mat(rightType) && + rightType.componentType().matches(leftType)) { + return simplify_componentwise(context, pos, + *splat_scalar(context, *left, right->type()), op, *right); + } + + // Perform constant folding on pairs of matrices, arrays or structs. + if ((leftType.isMatrix() && rightType.isMatrix()) || + (leftType.isArray() && rightType.isArray()) || + (leftType.isStruct() && rightType.isStruct())) { + return simplify_constant_equality(context, pos, *left, op, *right); + } + } + + if (context.fConfig->fSettings.fOptimize) { + // If just one side is constant, we might still be able to simplify arithmetic expressions + // like `x * 1`, `x *= 1`, `x + 0`, `x * 0`, `0 / x`, etc. + if (leftSideIsConstant || rightSideIsConstant) { + if (std::unique_ptr expr = simplify_arithmetic(context, pos, *left, op, + *right, resultType)) { + return expr; + } + } + + // We can simplify some forms of matrix division even when neither side is constant. + if (std::unique_ptr expr = simplify_matrix_division(context, pos, *left, op, + *right, resultType)) { + return expr; + } + } + + // We aren't able to constant-fold. + return nullptr; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLConstantFolder.h b/gfx/skia/skia/src/sksl/SkSLConstantFolder.h new file mode 100644 index 0000000000..25dd2e7b86 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLConstantFolder.h @@ -0,0 +1,71 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_CONSTANT_FOLDER +#define SKSL_CONSTANT_FOLDER + +#include + +#include "include/private/SkSLDefines.h" +#include "include/sksl/SkSLOperator.h" + +namespace SkSL { + +class Context; +class Expression; +class Position; +class Type; + +/** + * Performs constant folding on IR expressions. This simplifies expressions containing + * compile-time constants, such as replacing `Literal(2) + Literal(2)` with `Literal(4)`. + */ +class ConstantFolder { +public: + /** + * If value is an int literal or const int variable with a known value, returns true and stores + * the value in out. Otherwise returns false. + */ + static bool GetConstantInt(const Expression& value, SKSL_INT* out); + + /** + * If value is a literal or const scalar variable with a known value, returns true and stores + * the value in out. Otherwise returns false. + */ + static bool GetConstantValue(const Expression& value, double* out); + + /** + * If the expression is a const variable with a known compile-time-constant value, returns that + * value. If not, returns the original expression as-is. + */ + static const Expression* GetConstantValueForVariable(const Expression& value); + + /** + * If the expression is a const variable with a known compile-time-constant value, returns that + * value. If not, returns null. + */ + static const Expression* GetConstantValueOrNullForVariable(const Expression& value); + + /** + * If the expression is a const variable with a known compile-time-constant value, returns a + * clone of that value. If not, returns the original expression as-is. + */ + static std::unique_ptr MakeConstantValueForVariable(Position pos, + std::unique_ptr expr); + + /** Simplifies the binary expression `left OP right`. Returns null if it can't be simplified. */ + static std::unique_ptr Simplify(const Context& context, + Position pos, + const Expression& left, + Operator op, + const Expression& right, + const Type& resultType); +}; + +} // namespace SkSL + +#endif // SKSL_CONSTANT_FOLDER diff --git a/gfx/skia/skia/src/sksl/SkSLContext.cpp b/gfx/skia/skia/src/sksl/SkSLContext.cpp new file mode 100644 index 0000000000..d28fc9d727 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLContext.cpp @@ -0,0 +1,29 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLContext.h" + +#include "include/core/SkTypes.h" +#ifdef SK_DEBUG +#include "src/sksl/SkSLPool.h" +#endif + +namespace SkSL { + +Context::Context(const BuiltinTypes& types, const ShaderCaps* caps, ErrorReporter& errors) + : fTypes(types) + , fCaps(caps) + , fErrors(&errors) { + SkASSERT(!Pool::IsAttached()); +} + +Context::~Context() { + SkASSERT(!Pool::IsAttached()); +} + +} // namespace SkSL + diff --git a/gfx/skia/skia/src/sksl/SkSLContext.h b/gfx/skia/skia/src/sksl/SkSLContext.h new file mode 100644 index 0000000000..e83f2f36ec --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLContext.h @@ -0,0 +1,49 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_CONTEXT +#define SKSL_CONTEXT + +namespace SkSL { + +class BuiltinTypes; +class ErrorReporter; +class ModifiersPool; +struct Module; +struct ProgramConfig; +struct ShaderCaps; + +/** + * Contains compiler-wide objects, which currently means the core types. + */ +class Context { +public: + Context(const BuiltinTypes& types, const ShaderCaps* caps, ErrorReporter& errors); + ~Context(); + + // The Context holds a reference to all of the built-in types. + const BuiltinTypes& fTypes; + + // The Context holds a reference to our shader caps bits. + const ShaderCaps* fCaps; + + // The Context holds a pointer to our pool of modifiers. + ModifiersPool* fModifiersPool = nullptr; + + // The Context holds a pointer to the configuration of the program being compiled. + ProgramConfig* fConfig = nullptr; + + // The Context holds a pointer to our error reporter. + ErrorReporter* fErrors; + + // The Context holds a pointer to our module with built-in declarations. + const Module* fModule = nullptr; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLErrorReporter.cpp b/gfx/skia/skia/src/sksl/SkSLErrorReporter.cpp new file mode 100644 index 0000000000..a11234ff5e --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLErrorReporter.cpp @@ -0,0 +1,29 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/sksl/SkSLErrorReporter.h" + +#include "include/sksl/SkSLPosition.h" +#include "src/base/SkStringView.h" +#include "src/sksl/SkSLCompiler.h" + +namespace SkSL { + +void ErrorReporter::error(Position position, std::string_view msg) { + if (skstd::contains(msg, Compiler::POISON_TAG)) { + // Don't report errors on poison values. + return; + } + ++fErrorCount; + this->handleError(msg, position); +} + +void TestingOnly_AbortErrorReporter::handleError(std::string_view msg, Position pos) { + SK_ABORT("%.*s", (int)msg.length(), msg.data()); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLFileOutputStream.h b/gfx/skia/skia/src/sksl/SkSLFileOutputStream.h new file mode 100644 index 0000000000..26f59edefc --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLFileOutputStream.h @@ -0,0 +1,78 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_FILEOUTPUTSTREAM +#define SKSL_FILEOUTPUTSTREAM + +#include "src/sksl/SkSLOutputStream.h" +#include "src/sksl/SkSLUtil.h" +#include + +namespace SkSL { + +class FileOutputStream : public OutputStream { +public: + FileOutputStream(const char* name) { + fFile = fopen(name, "wb"); + } + + ~FileOutputStream() override { + if (fOpen) { + close(); + } + } + + bool isValid() const override { + return nullptr != fFile; + } + + void write8(uint8_t b) override { + SkASSERT(fOpen); + if (isValid()) { + if (EOF == fputc(b, fFile)) { + fFile = nullptr; + } + } + } + + void writeText(const char* s) override { + SkASSERT(fOpen); + if (isValid()) { + if (EOF == fputs(s, fFile)) { + fFile = nullptr; + } + } + } + + void write(const void* s, size_t size) override { + if (isValid()) { + size_t written = fwrite(s, 1, size, fFile); + if (written != size) { + fFile = nullptr; + } + } + } + + bool close() { + fOpen = false; + if (isValid() && fclose(fFile)) { + fFile = nullptr; + return false; + } + return true; + } + +private: + bool fOpen = true; + FILE *fFile; + + using INHERITED = OutputStream; +}; + +} // namespace + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLGLSL.h b/gfx/skia/skia/src/sksl/SkSLGLSL.h new file mode 100644 index 0000000000..55c8bc87e5 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLGLSL.h @@ -0,0 +1,58 @@ +/* + * Copyright 2021 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLGLSL_DEFINED +#define SkSLGLSL_DEFINED + +namespace SkSL { + +// Limited set of GLSL versions we build shaders for. Caller should round +// down the GLSL version to one of these enums. +enum class GLSLGeneration { + /** + * Desktop GLSL 1.10 and ES2 shading language (based on desktop GLSL 1.20) + */ + k110, + k100es = k110, + /** + * Desktop GLSL 1.30 + */ + k130, + /** + * Desktop GLSL 1.40 + */ + k140, + /** + * Desktop GLSL 1.50 + */ + k150, + /** + * Desktop GLSL 3.30, and ES GLSL 3.00 + */ + k330, + k300es = k330, + /** + * Desktop GLSL 4.00 + */ + k400, + /** + * Desktop GLSL 4.20 + */ + k420, + /** + * ES GLSL 3.10 only TODO Make GLSLCap objects to make this more granular + */ + k310es, + /** + * ES GLSL 3.20 + */ + k320es, +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLInliner.cpp b/gfx/skia/skia/src/sksl/SkSLInliner.cpp new file mode 100644 index 0000000000..d90227e3bb --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLInliner.cpp @@ -0,0 +1,1062 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLInliner.h" + +#ifndef SK_ENABLE_OPTIMIZE_SIZE + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLStatement.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLOperator.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/analysis/SkSLProgramUsage.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLChildCall.h" +#include "src/sksl/ir/SkSLConstructor.h" +#include "src/sksl/ir/SkSLConstructorArray.h" +#include "src/sksl/ir/SkSLConstructorArrayCast.h" +#include "src/sksl/ir/SkSLConstructorCompound.h" +#include "src/sksl/ir/SkSLConstructorCompoundCast.h" +#include "src/sksl/ir/SkSLConstructorDiagonalMatrix.h" +#include "src/sksl/ir/SkSLConstructorMatrixResize.h" +#include "src/sksl/ir/SkSLConstructorScalarCast.h" +#include "src/sksl/ir/SkSLConstructorSplat.h" +#include "src/sksl/ir/SkSLConstructorStruct.h" +#include "src/sksl/ir/SkSLDoStatement.h" +#include "src/sksl/ir/SkSLExpressionStatement.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLIfStatement.h" +#include "src/sksl/ir/SkSLIndexExpression.h" +#include "src/sksl/ir/SkSLLiteral.h" +#include "src/sksl/ir/SkSLNop.h" +#include "src/sksl/ir/SkSLPostfixExpression.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLReturnStatement.h" +#include "src/sksl/ir/SkSLSetting.h" +#include "src/sksl/ir/SkSLSwitchCase.h" +#include "src/sksl/ir/SkSLSwitchStatement.h" +#include "src/sksl/ir/SkSLSwizzle.h" +#include "src/sksl/ir/SkSLSymbolTable.h" +#include "src/sksl/ir/SkSLTernaryExpression.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" +#include "src/sksl/transform/SkSLTransform.h" + +#include +#include +#include +#include +#include +#include +#include + +namespace SkSL { +namespace { + +static constexpr int kInlinedStatementLimit = 2500; + +static std::unique_ptr* find_parent_statement( + const std::vector*>& stmtStack) { + SkASSERT(!stmtStack.empty()); + + // Walk the statement stack from back to front, ignoring the last element (which is the + // enclosing statement). + auto iter = stmtStack.rbegin(); + ++iter; + + // Anything counts as a parent statement other than a scopeless Block. + for (; iter != stmtStack.rend(); ++iter) { + std::unique_ptr* stmt = *iter; + if (!(*stmt)->is() || (*stmt)->as().isScope()) { + return stmt; + } + } + + // There wasn't any parent statement to be found. + return nullptr; +} + +std::unique_ptr clone_with_ref_kind(const Expression& expr, + VariableReference::RefKind refKind) { + std::unique_ptr clone = expr.clone(); + Analysis::UpdateVariableRefKind(clone.get(), refKind); + return clone; +} + +} // namespace + +const Variable* Inliner::RemapVariable(const Variable* variable, + const VariableRewriteMap* varMap) { + std::unique_ptr* remap = varMap->find(variable); + if (!remap) { + SkDEBUGFAILF("rewrite map does not contain variable '%.*s'", + (int)variable->name().size(), variable->name().data()); + return variable; + } + Expression* expr = remap->get(); + SkASSERT(expr); + if (!expr->is()) { + SkDEBUGFAILF("rewrite map contains non-variable replacement for '%.*s'", + (int)variable->name().size(), variable->name().data()); + return variable; + } + return expr->as().variable(); +} + +void Inliner::ensureScopedBlocks(Statement* inlinedBody, Statement* parentStmt) { + // No changes necessary if this statement isn't actually a block. + if (!inlinedBody || !inlinedBody->is()) { + return; + } + + // No changes necessary if the parent statement doesn't require a scope. + if (!parentStmt || !(parentStmt->is() || parentStmt->is() || + parentStmt->is())) { + return; + } + + Block& block = inlinedBody->as(); + + // The inliner will create inlined function bodies as a Block containing multiple statements, + // but no scope. Normally, this is fine, but if this block is used as the statement for a + // do/for/if/while, the block needs to be scoped for the generated code to match the intent. + // In the case of Blocks nested inside other Blocks, we add the scope to the outermost block if + // needed. + for (Block* nestedBlock = █; ) { + if (nestedBlock->isScope()) { + // We found an explicit scope; all is well. + return; + } + if (nestedBlock->children().size() == 1 && nestedBlock->children()[0]->is()) { + // This block wraps another unscoped block; we need to go deeper. + nestedBlock = &nestedBlock->children()[0]->as(); + continue; + } + // We found a block containing real statements (not just more blocks), but no scope. + // Let's add a scope to the outermost block. + block.setBlockKind(Block::Kind::kBracedScope); + return; + } +} + +std::unique_ptr Inliner::inlineExpression(Position pos, + VariableRewriteMap* varMap, + SymbolTable* symbolTableForExpression, + const Expression& expression) { + auto expr = [&](const std::unique_ptr& e) -> std::unique_ptr { + if (e) { + return this->inlineExpression(pos, varMap, symbolTableForExpression, *e); + } + return nullptr; + }; + auto argList = [&](const ExpressionArray& originalArgs) -> ExpressionArray { + ExpressionArray args; + args.reserve_back(originalArgs.size()); + for (const std::unique_ptr& arg : originalArgs) { + args.push_back(expr(arg)); + } + return args; + }; + + switch (expression.kind()) { + case Expression::Kind::kBinary: { + const BinaryExpression& binaryExpr = expression.as(); + return BinaryExpression::Make(*fContext, + pos, + expr(binaryExpr.left()), + binaryExpr.getOperator(), + expr(binaryExpr.right())); + } + case Expression::Kind::kLiteral: + return expression.clone(); + case Expression::Kind::kChildCall: { + const ChildCall& childCall = expression.as(); + return ChildCall::Make(*fContext, + pos, + childCall.type().clone(symbolTableForExpression), + childCall.child(), + argList(childCall.arguments())); + } + case Expression::Kind::kConstructorArray: { + const ConstructorArray& ctor = expression.as(); + return ConstructorArray::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + argList(ctor.arguments())); + } + case Expression::Kind::kConstructorArrayCast: { + const ConstructorArrayCast& ctor = expression.as(); + return ConstructorArrayCast::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + expr(ctor.argument())); + } + case Expression::Kind::kConstructorCompound: { + const ConstructorCompound& ctor = expression.as(); + return ConstructorCompound::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + argList(ctor.arguments())); + } + case Expression::Kind::kConstructorCompoundCast: { + const ConstructorCompoundCast& ctor = expression.as(); + return ConstructorCompoundCast::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + expr(ctor.argument())); + } + case Expression::Kind::kConstructorDiagonalMatrix: { + const ConstructorDiagonalMatrix& ctor = expression.as(); + return ConstructorDiagonalMatrix::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + expr(ctor.argument())); + } + case Expression::Kind::kConstructorMatrixResize: { + const ConstructorMatrixResize& ctor = expression.as(); + return ConstructorMatrixResize::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + expr(ctor.argument())); + } + case Expression::Kind::kConstructorScalarCast: { + const ConstructorScalarCast& ctor = expression.as(); + return ConstructorScalarCast::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + expr(ctor.argument())); + } + case Expression::Kind::kConstructorSplat: { + const ConstructorSplat& ctor = expression.as(); + return ConstructorSplat::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + expr(ctor.argument())); + } + case Expression::Kind::kConstructorStruct: { + const ConstructorStruct& ctor = expression.as(); + return ConstructorStruct::Make(*fContext, pos, + *ctor.type().clone(symbolTableForExpression), + argList(ctor.arguments())); + } + case Expression::Kind::kFieldAccess: { + const FieldAccess& f = expression.as(); + return FieldAccess::Make(*fContext, pos, expr(f.base()), f.fieldIndex(), f.ownerKind()); + } + case Expression::Kind::kFunctionCall: { + const FunctionCall& funcCall = expression.as(); + return FunctionCall::Make(*fContext, + pos, + funcCall.type().clone(symbolTableForExpression), + funcCall.function(), + argList(funcCall.arguments())); + } + case Expression::Kind::kFunctionReference: + return expression.clone(); + case Expression::Kind::kIndex: { + const IndexExpression& idx = expression.as(); + return IndexExpression::Make(*fContext, pos, expr(idx.base()), expr(idx.index())); + } + case Expression::Kind::kMethodReference: + return expression.clone(); + case Expression::Kind::kPrefix: { + const PrefixExpression& p = expression.as(); + return PrefixExpression::Make(*fContext, pos, p.getOperator(), expr(p.operand())); + } + case Expression::Kind::kPostfix: { + const PostfixExpression& p = expression.as(); + return PostfixExpression::Make(*fContext, pos, expr(p.operand()), p.getOperator()); + } + case Expression::Kind::kSetting: { + const Setting& s = expression.as(); + return Setting::Convert(*fContext, pos, s.name()); + } + case Expression::Kind::kSwizzle: { + const Swizzle& s = expression.as(); + return Swizzle::Make(*fContext, pos, expr(s.base()), s.components()); + } + case Expression::Kind::kTernary: { + const TernaryExpression& t = expression.as(); + return TernaryExpression::Make(*fContext, pos, expr(t.test()), + expr(t.ifTrue()), expr(t.ifFalse())); + } + case Expression::Kind::kTypeReference: + return expression.clone(); + case Expression::Kind::kVariableReference: { + const VariableReference& v = expression.as(); + std::unique_ptr* remap = varMap->find(v.variable()); + if (remap) { + return clone_with_ref_kind(**remap, v.refKind()); + } + return expression.clone(); + } + default: + SkASSERT(false); + return nullptr; + } +} + +std::unique_ptr Inliner::inlineStatement(Position pos, + VariableRewriteMap* varMap, + SymbolTable* symbolTableForStatement, + std::unique_ptr* resultExpr, + Analysis::ReturnComplexity returnComplexity, + const Statement& statement, + const ProgramUsage& usage, + bool isBuiltinCode) { + auto stmt = [&](const std::unique_ptr& s) -> std::unique_ptr { + if (s) { + return this->inlineStatement(pos, varMap, symbolTableForStatement, resultExpr, + returnComplexity, *s, usage, isBuiltinCode); + } + return nullptr; + }; + auto blockStmts = [&](const Block& block) { + StatementArray result; + result.reserve_back(block.children().size()); + for (const std::unique_ptr& child : block.children()) { + result.push_back(stmt(child)); + } + return result; + }; + auto expr = [&](const std::unique_ptr& e) -> std::unique_ptr { + if (e) { + return this->inlineExpression(pos, varMap, symbolTableForStatement, *e); + } + return nullptr; + }; + auto variableModifiers = [&](const Variable& variable, + const Expression* initialValue) -> const Modifiers* { + return Transform::AddConstToVarModifiers(*fContext, variable, initialValue, &usage); + }; + + ++fInlinedStatementCounter; + + switch (statement.kind()) { + case Statement::Kind::kBlock: { + const Block& b = statement.as(); + return Block::Make(pos, blockStmts(b), b.blockKind(), + SymbolTable::WrapIfBuiltin(b.symbolTable())); + } + + case Statement::Kind::kBreak: + case Statement::Kind::kContinue: + case Statement::Kind::kDiscard: + return statement.clone(); + + case Statement::Kind::kDo: { + const DoStatement& d = statement.as(); + return DoStatement::Make(*fContext, pos, stmt(d.statement()), expr(d.test())); + } + case Statement::Kind::kExpression: { + const ExpressionStatement& e = statement.as(); + return ExpressionStatement::Make(*fContext, expr(e.expression())); + } + case Statement::Kind::kFor: { + const ForStatement& f = statement.as(); + // need to ensure initializer is evaluated first so that we've already remapped its + // declarations by the time we evaluate test & next + std::unique_ptr initializer = stmt(f.initializer()); + + std::unique_ptr unrollInfo; + if (f.unrollInfo()) { + // The for loop's unroll-info points to the Variable in the initializer as the + // index. This variable has been rewritten into a clone by the inliner, so we need + // to update the loop-unroll info to point to the clone. + unrollInfo = std::make_unique(*f.unrollInfo()); + unrollInfo->fIndex = RemapVariable(unrollInfo->fIndex, varMap); + } + return ForStatement::Make(*fContext, pos, ForLoopPositions{}, std::move(initializer), + expr(f.test()), expr(f.next()), stmt(f.statement()), + std::move(unrollInfo), + SymbolTable::WrapIfBuiltin(f.symbols())); + } + case Statement::Kind::kIf: { + const IfStatement& i = statement.as(); + return IfStatement::Make(*fContext, pos, expr(i.test()), + stmt(i.ifTrue()), stmt(i.ifFalse())); + } + case Statement::Kind::kNop: + return statement.clone(); + + case Statement::Kind::kReturn: { + const ReturnStatement& r = statement.as(); + if (!r.expression()) { + // This function doesn't return a value. We won't inline functions with early + // returns, so a return statement is a no-op and can be treated as such. + return Nop::Make(); + } + + // If a function only contains a single return, and it doesn't reference variables from + // inside an Block's scope, we don't need to store the result in a variable at all. Just + // replace the function-call expression with the function's return expression. + SkASSERT(resultExpr); + if (returnComplexity <= Analysis::ReturnComplexity::kSingleSafeReturn) { + *resultExpr = expr(r.expression()); + return Nop::Make(); + } + + // For more complex functions, we assign their result into a variable. We refuse to + // inline anything with early returns, so this should be safe to do; that is, on this + // control path, this is the last statement that will occur. + SkASSERT(*resultExpr); + return ExpressionStatement::Make( + *fContext, + BinaryExpression::Make( + *fContext, + pos, + clone_with_ref_kind(**resultExpr, VariableRefKind::kWrite), + Operator::Kind::EQ, + expr(r.expression()))); + } + case Statement::Kind::kSwitch: { + const SwitchStatement& ss = statement.as(); + StatementArray cases; + cases.reserve_back(ss.cases().size()); + for (const std::unique_ptr& switchCaseStmt : ss.cases()) { + const SwitchCase& sc = switchCaseStmt->as(); + if (sc.isDefault()) { + cases.push_back(SwitchCase::MakeDefault(pos, stmt(sc.statement()))); + } else { + cases.push_back(SwitchCase::Make(pos, sc.value(), stmt(sc.statement()))); + } + } + return SwitchStatement::Make(*fContext, pos, expr(ss.value()), + std::move(cases), SymbolTable::WrapIfBuiltin(ss.symbols())); + } + case Statement::Kind::kVarDeclaration: { + const VarDeclaration& decl = statement.as(); + std::unique_ptr initialValue = expr(decl.value()); + const Variable* variable = decl.var(); + + // We assign unique names to inlined variables--scopes hide most of the problems in this + // regard, but see `InlinerAvoidsVariableNameOverlap` for a counterexample where unique + // names are important. + const std::string* name = symbolTableForStatement->takeOwnershipOfString( + fMangler.uniqueName(variable->name(), symbolTableForStatement)); + auto clonedVar = std::make_unique( + pos, + variable->modifiersPosition(), + variableModifiers(*variable, initialValue.get()), + name->c_str(), + variable->type().clone(symbolTableForStatement), + isBuiltinCode, + variable->storage()); + varMap->set(variable, VariableReference::Make(pos, clonedVar.get())); + auto result = VarDeclaration::Make(*fContext, + clonedVar.get(), + decl.baseType().clone(symbolTableForStatement), + decl.arraySize(), + std::move(initialValue)); + symbolTableForStatement->takeOwnershipOfSymbol(std::move(clonedVar)); + return result; + } + default: + SkASSERT(false); + return nullptr; + } +} + +Inliner::InlinedCall Inliner::inlineCall(const FunctionCall& call, + std::shared_ptr symbolTable, + const ProgramUsage& usage, + const FunctionDeclaration* caller) { + using ScratchVariable = Variable::ScratchVariable; + + // Inlining is more complicated here than in a typical compiler, because we have to have a + // high-level IR and can't just drop statements into the middle of an expression or even use + // gotos. + // + // Since we can't insert statements into an expression, we run the inline function as extra + // statements before the statement we're currently processing, relying on a lack of execution + // order guarantees. Since we can't use gotos (which are normally used to replace return + // statements), we wrap the whole function in a loop and use break statements to jump to the + // end. + SkASSERT(fContext); + SkASSERT(this->isSafeToInline(call.function().definition(), usage)); + + const ExpressionArray& arguments = call.arguments(); + const Position pos = call.fPosition; + const FunctionDefinition& function = *call.function().definition(); + const Block& body = function.body()->as(); + const Analysis::ReturnComplexity returnComplexity = Analysis::GetReturnComplexity(function); + + StatementArray inlineStatements; + int expectedStmtCount = 1 + // Result variable + arguments.size() + // Function argument temp-vars + body.children().size(); // Inlined code + + inlineStatements.reserve_back(expectedStmtCount); + + std::unique_ptr resultExpr; + if (returnComplexity > Analysis::ReturnComplexity::kSingleSafeReturn && + !function.declaration().returnType().isVoid()) { + // Create a variable to hold the result in the extra statements. We don't need to do this + // for void-return functions, or in cases that are simple enough that we can just replace + // the function-call node with the result expression. + ScratchVariable var = Variable::MakeScratchVariable(*fContext, + fMangler, + function.declaration().name(), + &function.declaration().returnType(), + Modifiers{}, + symbolTable.get(), + /*initialValue=*/nullptr); + inlineStatements.push_back(std::move(var.fVarDecl)); + resultExpr = VariableReference::Make(Position(), var.fVarSymbol); + } + + // Create variables in the extra statements to hold the arguments, and assign the arguments to + // them. + VariableRewriteMap varMap; + for (int i = 0; i < arguments.size(); ++i) { + // If the parameter isn't written to within the inline function ... + const Expression* arg = arguments[i].get(); + const Variable* param = function.declaration().parameters()[i]; + const ProgramUsage::VariableCounts& paramUsage = usage.get(*param); + if (!paramUsage.fWrite) { + // ... and can be inlined trivially (e.g. a swizzle, or a constant array index), + // or any expression without side effects that is only accessed at most once... + if ((paramUsage.fRead > 1) ? Analysis::IsTrivialExpression(*arg) + : !Analysis::HasSideEffects(*arg)) { + // ... we don't need to copy it at all! We can just use the existing expression. + varMap.set(param, arg->clone()); + continue; + } + } + ScratchVariable var = Variable::MakeScratchVariable(*fContext, + fMangler, + param->name(), + &arg->type(), + param->modifiers(), + symbolTable.get(), + arg->clone()); + inlineStatements.push_back(std::move(var.fVarDecl)); + varMap.set(param, VariableReference::Make(Position(), var.fVarSymbol)); + } + + for (const std::unique_ptr& stmt : body.children()) { + inlineStatements.push_back(this->inlineStatement(pos, &varMap, symbolTable.get(), + &resultExpr, returnComplexity, *stmt, + usage, caller->isBuiltin())); + } + + SkASSERT(inlineStatements.size() <= expectedStmtCount); + + // Wrap all of the generated statements in a block. We need a real Block here, because we need + // to add another child statement to the Block later. + InlinedCall inlinedCall; + inlinedCall.fInlinedBody = Block::MakeBlock(pos, std::move(inlineStatements), + Block::Kind::kUnbracedBlock); + if (resultExpr) { + // Return our result expression as-is. + inlinedCall.fReplacementExpr = std::move(resultExpr); + } else if (function.declaration().returnType().isVoid()) { + // It's a void function, so it doesn't actually result in anything, but we have to return + // something non-null as a standin. + inlinedCall.fReplacementExpr = Literal::MakeBool(*fContext, pos, /*value=*/false); + } else { + // It's a non-void function, but it never created a result expression--that is, it never + // returned anything on any path! This should have been detected in the function finalizer. + // Still, discard our output and generate an error. + SkDEBUGFAIL("inliner found non-void function that fails to return a value on any path"); + fContext->fErrors->error(function.fPosition, "inliner found non-void function '" + + std::string(function.declaration().name()) + + "' that fails to return a value on any path"); + inlinedCall = {}; + } + + return inlinedCall; +} + +bool Inliner::isSafeToInline(const FunctionDefinition* functionDef, const ProgramUsage& usage) { + // A threshold of zero indicates that the inliner is completely disabled, so we can just return. + if (this->settings().fInlineThreshold <= 0) { + return false; + } + + // Enforce a limit on inlining to avoid pathological cases. (inliner/ExponentialGrowth.sksl) + if (fInlinedStatementCounter >= kInlinedStatementLimit) { + return false; + } + + if (functionDef == nullptr) { + // Can't inline something if we don't actually have its definition. + return false; + } + + if (functionDef->declaration().modifiers().fFlags & Modifiers::kNoInline_Flag) { + // Refuse to inline functions decorated with `noinline`. + return false; + } + + // We don't allow inlining a function with out parameters that are written to. + // (See skia:11326 for rationale.) + for (const Variable* param : functionDef->declaration().parameters()) { + if (param->modifiers().fFlags & Modifiers::Flag::kOut_Flag) { + ProgramUsage::VariableCounts counts = usage.get(*param); + if (counts.fWrite > 0) { + return false; + } + } + } + + // We don't have a mechanism to simulate early returns, so we can't inline if there is one. + return Analysis::GetReturnComplexity(*functionDef) < Analysis::ReturnComplexity::kEarlyReturns; +} + +// A candidate function for inlining, containing everything that `inlineCall` needs. +struct InlineCandidate { + std::shared_ptr fSymbols; // the SymbolTable of the candidate + std::unique_ptr* fParentStmt; // the parent Statement of the enclosing stmt + std::unique_ptr* fEnclosingStmt; // the Statement containing the candidate + std::unique_ptr* fCandidateExpr; // the candidate FunctionCall to be inlined + FunctionDefinition* fEnclosingFunction; // the Function containing the candidate +}; + +struct InlineCandidateList { + std::vector fCandidates; +}; + +class InlineCandidateAnalyzer { +public: + // A list of all the inlining candidates we found during analysis. + InlineCandidateList* fCandidateList; + + // A stack of the symbol tables; since most nodes don't have one, expected to be shallower than + // the enclosing-statement stack. + std::vector> fSymbolTableStack; + // A stack of "enclosing" statements--these would be suitable for the inliner to use for adding + // new instructions. Not all statements are suitable (e.g. a for-loop's initializer). The + // inliner might replace a statement with a block containing the statement. + std::vector*> fEnclosingStmtStack; + // The function that we're currently processing (i.e. inlining into). + FunctionDefinition* fEnclosingFunction = nullptr; + + void visit(const std::vector>& elements, + std::shared_ptr symbols, + InlineCandidateList* candidateList) { + fCandidateList = candidateList; + fSymbolTableStack.push_back(symbols); + + for (const std::unique_ptr& pe : elements) { + this->visitProgramElement(pe.get()); + } + + fSymbolTableStack.pop_back(); + fCandidateList = nullptr; + } + + void visitProgramElement(ProgramElement* pe) { + switch (pe->kind()) { + case ProgramElement::Kind::kFunction: { + FunctionDefinition& funcDef = pe->as(); + fEnclosingFunction = &funcDef; + this->visitStatement(&funcDef.body()); + break; + } + default: + // The inliner can't operate outside of a function's scope. + break; + } + } + + void visitStatement(std::unique_ptr* stmt, + bool isViableAsEnclosingStatement = true) { + if (!*stmt) { + return; + } + + Analysis::SymbolTableStackBuilder scopedStackBuilder(stmt->get(), &fSymbolTableStack); + size_t oldEnclosingStmtStackSize = fEnclosingStmtStack.size(); + + if (isViableAsEnclosingStatement) { + fEnclosingStmtStack.push_back(stmt); + } + + switch ((*stmt)->kind()) { + case Statement::Kind::kBreak: + case Statement::Kind::kContinue: + case Statement::Kind::kDiscard: + case Statement::Kind::kNop: + break; + + case Statement::Kind::kBlock: { + Block& block = (*stmt)->as(); + for (std::unique_ptr& blockStmt : block.children()) { + this->visitStatement(&blockStmt); + } + break; + } + case Statement::Kind::kDo: { + DoStatement& doStmt = (*stmt)->as(); + // The loop body is a candidate for inlining. + this->visitStatement(&doStmt.statement()); + // The inliner isn't smart enough to inline the test-expression for a do-while + // loop at this time. There are two limitations: + // - We would need to insert the inlined-body block at the very end of the do- + // statement's inner fStatement. We don't support that today, but it's doable. + // - We cannot inline the test expression if the loop uses `continue` anywhere; that + // would skip over the inlined block that evaluates the test expression. There + // isn't a good fix for this--any workaround would be more complex than the cost + // of a function call. However, loops that don't use `continue` would still be + // viable candidates for inlining. + break; + } + case Statement::Kind::kExpression: { + ExpressionStatement& expr = (*stmt)->as(); + this->visitExpression(&expr.expression()); + break; + } + case Statement::Kind::kFor: { + ForStatement& forStmt = (*stmt)->as(); + // The initializer and loop body are candidates for inlining. + this->visitStatement(&forStmt.initializer(), + /*isViableAsEnclosingStatement=*/false); + this->visitStatement(&forStmt.statement()); + + // The inliner isn't smart enough to inline the test- or increment-expressions + // of a for loop loop at this time. There are a handful of limitations: + // - We would need to insert the test-expression block at the very beginning of the + // for-loop's inner fStatement, and the increment-expression block at the very + // end. We don't support that today, but it's doable. + // - The for-loop's built-in test-expression would need to be dropped entirely, + // and the loop would be halted via a break statement at the end of the inlined + // test-expression. This is again something we don't support today, but it could + // be implemented. + // - We cannot inline the increment-expression if the loop uses `continue` anywhere; + // that would skip over the inlined block that evaluates the increment expression. + // There isn't a good fix for this--any workaround would be more complex than the + // cost of a function call. However, loops that don't use `continue` would still + // be viable candidates for increment-expression inlining. + break; + } + case Statement::Kind::kIf: { + IfStatement& ifStmt = (*stmt)->as(); + this->visitExpression(&ifStmt.test()); + this->visitStatement(&ifStmt.ifTrue()); + this->visitStatement(&ifStmt.ifFalse()); + break; + } + case Statement::Kind::kReturn: { + ReturnStatement& returnStmt = (*stmt)->as(); + this->visitExpression(&returnStmt.expression()); + break; + } + case Statement::Kind::kSwitch: { + SwitchStatement& switchStmt = (*stmt)->as(); + this->visitExpression(&switchStmt.value()); + for (const std::unique_ptr& switchCase : switchStmt.cases()) { + // The switch-case's fValue cannot be a FunctionCall; skip it. + this->visitStatement(&switchCase->as().statement()); + } + break; + } + case Statement::Kind::kVarDeclaration: { + VarDeclaration& varDeclStmt = (*stmt)->as(); + // Don't need to scan the declaration's sizes; those are always IntLiterals. + this->visitExpression(&varDeclStmt.value()); + break; + } + default: + SkUNREACHABLE; + } + + // Pop our symbol and enclosing-statement stacks. + fEnclosingStmtStack.resize(oldEnclosingStmtStackSize); + } + + void visitExpression(std::unique_ptr* expr) { + if (!*expr) { + return; + } + + switch ((*expr)->kind()) { + case Expression::Kind::kFieldAccess: + case Expression::Kind::kFunctionReference: + case Expression::Kind::kLiteral: + case Expression::Kind::kMethodReference: + case Expression::Kind::kSetting: + case Expression::Kind::kTypeReference: + case Expression::Kind::kVariableReference: + // Nothing to scan here. + break; + + case Expression::Kind::kBinary: { + BinaryExpression& binaryExpr = (*expr)->as(); + this->visitExpression(&binaryExpr.left()); + + // Logical-and and logical-or binary expressions do not inline the right side, + // because that would invalidate short-circuiting. That is, when evaluating + // expressions like these: + // (false && x()) // always false + // (true || y()) // always true + // It is illegal for side-effects from x() or y() to occur. The simplest way to + // enforce that rule is to avoid inlining the right side entirely. However, it is + // safe for other types of binary expression to inline both sides. + Operator op = binaryExpr.getOperator(); + bool shortCircuitable = (op.kind() == Operator::Kind::LOGICALAND || + op.kind() == Operator::Kind::LOGICALOR); + if (!shortCircuitable) { + this->visitExpression(&binaryExpr.right()); + } + break; + } + case Expression::Kind::kChildCall: { + ChildCall& childCallExpr = (*expr)->as(); + for (std::unique_ptr& arg : childCallExpr.arguments()) { + this->visitExpression(&arg); + } + break; + } + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorArrayCast: + case Expression::Kind::kConstructorCompound: + case Expression::Kind::kConstructorCompoundCast: + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorStruct: { + AnyConstructor& constructorExpr = (*expr)->asAnyConstructor(); + for (std::unique_ptr& arg : constructorExpr.argumentSpan()) { + this->visitExpression(&arg); + } + break; + } + case Expression::Kind::kFunctionCall: { + FunctionCall& funcCallExpr = (*expr)->as(); + for (std::unique_ptr& arg : funcCallExpr.arguments()) { + this->visitExpression(&arg); + } + this->addInlineCandidate(expr); + break; + } + case Expression::Kind::kIndex: { + IndexExpression& indexExpr = (*expr)->as(); + this->visitExpression(&indexExpr.base()); + this->visitExpression(&indexExpr.index()); + break; + } + case Expression::Kind::kPostfix: { + PostfixExpression& postfixExpr = (*expr)->as(); + this->visitExpression(&postfixExpr.operand()); + break; + } + case Expression::Kind::kPrefix: { + PrefixExpression& prefixExpr = (*expr)->as(); + this->visitExpression(&prefixExpr.operand()); + break; + } + case Expression::Kind::kSwizzle: { + Swizzle& swizzleExpr = (*expr)->as(); + this->visitExpression(&swizzleExpr.base()); + break; + } + case Expression::Kind::kTernary: { + TernaryExpression& ternaryExpr = (*expr)->as(); + // The test expression is a candidate for inlining. + this->visitExpression(&ternaryExpr.test()); + // The true- and false-expressions cannot be inlined, because we are only allowed to + // evaluate one side. + break; + } + default: + SkUNREACHABLE; + } + } + + void addInlineCandidate(std::unique_ptr* candidate) { + fCandidateList->fCandidates.push_back( + InlineCandidate{fSymbolTableStack.back(), + find_parent_statement(fEnclosingStmtStack), + fEnclosingStmtStack.back(), + candidate, + fEnclosingFunction}); + } +}; + +static const FunctionDeclaration& candidate_func(const InlineCandidate& candidate) { + return (*candidate.fCandidateExpr)->as().function(); +} + +bool Inliner::candidateCanBeInlined(const InlineCandidate& candidate, + const ProgramUsage& usage, + InlinabilityCache* cache) { + const FunctionDeclaration& funcDecl = candidate_func(candidate); + if (const bool* cachedInlinability = cache->find(&funcDecl)) { + return *cachedInlinability; + } + bool inlinability = this->isSafeToInline(funcDecl.definition(), usage); + cache->set(&funcDecl, inlinability); + return inlinability; +} + +int Inliner::getFunctionSize(const FunctionDeclaration& funcDecl, FunctionSizeCache* cache) { + if (const int* cachedSize = cache->find(&funcDecl)) { + return *cachedSize; + } + int size = Analysis::NodeCountUpToLimit(*funcDecl.definition(), + this->settings().fInlineThreshold); + cache->set(&funcDecl, size); + return size; +} + +void Inliner::buildCandidateList(const std::vector>& elements, + std::shared_ptr symbols, ProgramUsage* usage, + InlineCandidateList* candidateList) { + // This is structured much like a ProgramVisitor, but does not actually use ProgramVisitor. + // The analyzer needs to keep track of the `unique_ptr*` of statements and expressions so + // that they can later be replaced, and ProgramVisitor does not provide this; it only provides a + // `const T&`. + InlineCandidateAnalyzer analyzer; + analyzer.visit(elements, symbols, candidateList); + + // Early out if there are no inlining candidates. + std::vector& candidates = candidateList->fCandidates; + if (candidates.empty()) { + return; + } + + // Remove candidates that are not safe to inline. + InlinabilityCache cache; + candidates.erase(std::remove_if(candidates.begin(), + candidates.end(), + [&](const InlineCandidate& candidate) { + return !this->candidateCanBeInlined( + candidate, *usage, &cache); + }), + candidates.end()); + + // If the inline threshold is unlimited, or if we have no candidates left, our candidate list is + // complete. + if (this->settings().fInlineThreshold == INT_MAX || candidates.empty()) { + return; + } + + // Remove candidates on a per-function basis if the effect of inlining would be to make more + // than `inlineThreshold` nodes. (i.e. if Func() would be inlined six times and its size is + // 10 nodes, it should be inlined if the inlineThreshold is 60 or higher.) + FunctionSizeCache functionSizeCache; + FunctionSizeCache candidateTotalCost; + for (InlineCandidate& candidate : candidates) { + const FunctionDeclaration& fnDecl = candidate_func(candidate); + candidateTotalCost[&fnDecl] += this->getFunctionSize(fnDecl, &functionSizeCache); + } + + candidates.erase(std::remove_if(candidates.begin(), candidates.end(), + [&](const InlineCandidate& candidate) { + const FunctionDeclaration& fnDecl = candidate_func(candidate); + if (fnDecl.modifiers().fFlags & Modifiers::kInline_Flag) { + // Functions marked `inline` ignore size limitations. + return false; + } + if (usage->get(fnDecl) == 1) { + // If a function is only used once, it's cost-free to inline. + return false; + } + if (candidateTotalCost[&fnDecl] <= this->settings().fInlineThreshold) { + // We won't exceed the inline threshold by inlining this. + return false; + } + // Inlining this function will add too many IRNodes. + return true; + }), + candidates.end()); +} + +bool Inliner::analyze(const std::vector>& elements, + std::shared_ptr symbols, + ProgramUsage* usage) { + // A threshold of zero indicates that the inliner is completely disabled, so we can just return. + if (this->settings().fInlineThreshold <= 0) { + return false; + } + + // Enforce a limit on inlining to avoid pathological cases. (inliner/ExponentialGrowth.sksl) + if (fInlinedStatementCounter >= kInlinedStatementLimit) { + return false; + } + + InlineCandidateList candidateList; + this->buildCandidateList(elements, symbols, usage, &candidateList); + + // Inline the candidates where we've determined that it's safe to do so. + using StatementRemappingTable = SkTHashMap*, + std::unique_ptr*>; + StatementRemappingTable statementRemappingTable; + + bool madeChanges = false; + for (const InlineCandidate& candidate : candidateList.fCandidates) { + const FunctionCall& funcCall = (*candidate.fCandidateExpr)->as(); + + // Convert the function call to its inlined equivalent. + InlinedCall inlinedCall = this->inlineCall(funcCall, candidate.fSymbols, *usage, + &candidate.fEnclosingFunction->declaration()); + + // Stop if an error was detected during the inlining process. + if (!inlinedCall.fInlinedBody && !inlinedCall.fReplacementExpr) { + break; + } + + // Ensure that the inlined body has a scope if it needs one. + this->ensureScopedBlocks(inlinedCall.fInlinedBody.get(), candidate.fParentStmt->get()); + + // Add references within the inlined body + usage->add(inlinedCall.fInlinedBody.get()); + + // Look up the enclosing statement; remap it if necessary. + std::unique_ptr* enclosingStmt = candidate.fEnclosingStmt; + for (;;) { + std::unique_ptr** remappedStmt = statementRemappingTable.find(enclosingStmt); + if (!remappedStmt) { + break; + } + enclosingStmt = *remappedStmt; + } + + // Move the enclosing statement to the end of the unscoped Block containing the inlined + // function, then replace the enclosing statement with that Block. + // Before: + // fInlinedBody = Block{ stmt1, stmt2, stmt3 } + // fEnclosingStmt = stmt4 + // After: + // fInlinedBody = null + // fEnclosingStmt = Block{ stmt1, stmt2, stmt3, stmt4 } + inlinedCall.fInlinedBody->children().push_back(std::move(*enclosingStmt)); + *enclosingStmt = std::move(inlinedCall.fInlinedBody); + + // Replace the candidate function call with our replacement expression. + usage->remove(candidate.fCandidateExpr->get()); + usage->add(inlinedCall.fReplacementExpr.get()); + *candidate.fCandidateExpr = std::move(inlinedCall.fReplacementExpr); + madeChanges = true; + + // If anything else pointed at our enclosing statement, it's now pointing at a Block + // containing many other statements as well. Maintain a fix-up table to account for this. + statementRemappingTable.set(enclosingStmt,&(*enclosingStmt)->as().children().back()); + + // Stop inlining if we've reached our hard cap on new statements. + if (fInlinedStatementCounter >= kInlinedStatementLimit) { + break; + } + + // Note that nothing was destroyed except for the FunctionCall. All other nodes should + // remain valid. + } + + return madeChanges; +} + +} // namespace SkSL + +#endif // SK_ENABLE_OPTIMIZE_SIZE diff --git a/gfx/skia/skia/src/sksl/SkSLInliner.h b/gfx/skia/skia/src/sksl/SkSLInliner.h new file mode 100644 index 0000000000..618365baf0 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLInliner.h @@ -0,0 +1,119 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_INLINER +#define SKSL_INLINER + +#ifndef SK_ENABLE_OPTIMIZE_SIZE + +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLMangler.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/ir/SkSLBlock.h" +#include "src/sksl/ir/SkSLExpression.h" + +#include +#include + +namespace SkSL { + +class FunctionCall; +class FunctionDeclaration; +class FunctionDefinition; +class Position; +class ProgramElement; +class ProgramUsage; +class Statement; +class SymbolTable; +class Variable; +struct InlineCandidate; +struct InlineCandidateList; +namespace Analysis { enum class ReturnComplexity; } + +/** + * Converts a FunctionCall in the IR to a set of statements to be injected ahead of the function + * call, and a replacement expression. Can also detect cases where inlining isn't cleanly possible + * (e.g. return statements nested inside of a loop construct). The inliner isn't able to guarantee + * identical-to-GLSL execution order if the inlined function has visible side effects. + */ +class Inliner { +public: + Inliner(const Context* context) : fContext(context) {} + + /** Inlines any eligible functions that are found. Returns true if any changes are made. */ + bool analyze(const std::vector>& elements, + std::shared_ptr symbols, + ProgramUsage* usage); + +private: + using VariableRewriteMap = SkTHashMap>; + + const ProgramSettings& settings() const { return fContext->fConfig->fSettings; } + + void buildCandidateList(const std::vector>& elements, + std::shared_ptr symbols, ProgramUsage* usage, + InlineCandidateList* candidateList); + + std::unique_ptr inlineExpression(Position pos, + VariableRewriteMap* varMap, + SymbolTable* symbolTableForExpression, + const Expression& expression); + std::unique_ptr inlineStatement(Position pos, + VariableRewriteMap* varMap, + SymbolTable* symbolTableForStatement, + std::unique_ptr* resultExpr, + Analysis::ReturnComplexity returnComplexity, + const Statement& statement, + const ProgramUsage& usage, + bool isBuiltinCode); + + /** + * Searches the rewrite map for an rewritten Variable* for the passed-in one. Asserts if the + * rewrite map doesn't contain the variable, or contains a different type of expression. + */ + static const Variable* RemapVariable(const Variable* variable, + const VariableRewriteMap* varMap); + + using InlinabilityCache = SkTHashMap; + bool candidateCanBeInlined(const InlineCandidate& candidate, + const ProgramUsage& usage, + InlinabilityCache* cache); + + using FunctionSizeCache = SkTHashMap; + int getFunctionSize(const FunctionDeclaration& fnDecl, FunctionSizeCache* cache); + + /** + * Processes the passed-in FunctionCall expression. The FunctionCall expression should be + * replaced with `fReplacementExpr`. If non-null, `fInlinedBody` should be inserted immediately + * above the statement containing the inlined expression. + */ + struct InlinedCall { + std::unique_ptr fInlinedBody; + std::unique_ptr fReplacementExpr; + }; + InlinedCall inlineCall(const FunctionCall&, + std::shared_ptr, + const ProgramUsage&, + const FunctionDeclaration* caller); + + /** Adds a scope to inlined bodies returned by `inlineCall`, if one is required. */ + void ensureScopedBlocks(Statement* inlinedBody, Statement* parentStmt); + + /** Checks whether inlining is viable for a FunctionCall, modulo recursion and function size. */ + bool isSafeToInline(const FunctionDefinition* functionDef, const ProgramUsage& usage); + + const Context* fContext = nullptr; + Mangler fMangler; + int fInlinedStatementCounter = 0; +}; + +} // namespace SkSL + +#endif // SK_ENABLE_OPTIMIZE_SIZE + +#endif // SKSL_INLINER diff --git a/gfx/skia/skia/src/sksl/SkSLIntrinsicList.cpp b/gfx/skia/skia/src/sksl/SkSLIntrinsicList.cpp new file mode 100644 index 0000000000..a582bdff60 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLIntrinsicList.cpp @@ -0,0 +1,33 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/base/SkStringView.h" +#include "src/sksl/SkSLIntrinsicList.h" + +namespace SkSL { + +const IntrinsicMap& GetIntrinsicMap() { + #define SKSL_INTRINSIC(name) {#name, k_##name##_IntrinsicKind}, + static const auto* kAllIntrinsics = new SkTHashMap{ + SKSL_INTRINSIC_LIST + }; + #undef SKSL_INTRINSIC + + return *kAllIntrinsics; +} + +IntrinsicKind FindIntrinsicKind(std::string_view functionName) { + if (skstd::starts_with(functionName, '$')) { + functionName.remove_prefix(1); + } + + const IntrinsicMap& intrinsicMap = GetIntrinsicMap(); + IntrinsicKind* kind = intrinsicMap.find(functionName); + return kind ? *kind : kNotIntrinsic; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLIntrinsicList.h b/gfx/skia/skia/src/sksl/SkSLIntrinsicList.h new file mode 100644 index 0000000000..9e41f3b1aa --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLIntrinsicList.h @@ -0,0 +1,145 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_INTRINSIC_LIST_DEFINED +#define SKSL_INTRINSIC_LIST_DEFINED + +#include "src/core/SkTHash.h" + +#include +#include +#include + +// A list of every intrinsic supported by SkSL. +// Using an X-Macro (https://en.wikipedia.org/wiki/X_Macro) to manage the list. +#define SKSL_INTRINSIC_LIST \ + SKSL_INTRINSIC(abs) \ + SKSL_INTRINSIC(acosh) \ + SKSL_INTRINSIC(acos) \ + SKSL_INTRINSIC(all) \ + SKSL_INTRINSIC(any) \ + SKSL_INTRINSIC(asinh) \ + SKSL_INTRINSIC(asin) \ + SKSL_INTRINSIC(atanh) \ + SKSL_INTRINSIC(atan) \ + SKSL_INTRINSIC(atomicAdd) \ + SKSL_INTRINSIC(atomicLoad) \ + SKSL_INTRINSIC(atomicStore) \ + SKSL_INTRINSIC(bitCount) \ + SKSL_INTRINSIC(ceil) \ + SKSL_INTRINSIC(clamp) \ + SKSL_INTRINSIC(cosh) \ + SKSL_INTRINSIC(cos) \ + SKSL_INTRINSIC(cross) \ + SKSL_INTRINSIC(degrees) \ + SKSL_INTRINSIC(determinant) \ + SKSL_INTRINSIC(dFdx) \ + SKSL_INTRINSIC(dFdy) \ + SKSL_INTRINSIC(distance) \ + SKSL_INTRINSIC(dot) \ + SKSL_INTRINSIC(equal) \ + SKSL_INTRINSIC(eval) \ + SKSL_INTRINSIC(exp2) \ + SKSL_INTRINSIC(exp) \ + SKSL_INTRINSIC(faceforward) \ + SKSL_INTRINSIC(findLSB) \ + SKSL_INTRINSIC(findMSB) \ + SKSL_INTRINSIC(floatBitsToInt) \ + SKSL_INTRINSIC(floatBitsToUint) \ + SKSL_INTRINSIC(floor) \ + SKSL_INTRINSIC(fma) \ + SKSL_INTRINSIC(fract) \ + SKSL_INTRINSIC(frexp) \ + SKSL_INTRINSIC(fromLinearSrgb) \ + SKSL_INTRINSIC(fwidth) \ + SKSL_INTRINSIC(greaterThanEqual) \ + SKSL_INTRINSIC(greaterThan) \ + SKSL_INTRINSIC(height) \ + SKSL_INTRINSIC(intBitsToFloat) \ + SKSL_INTRINSIC(inversesqrt) \ + SKSL_INTRINSIC(inverse) \ + SKSL_INTRINSIC(isinf) \ + SKSL_INTRINSIC(isnan) \ + SKSL_INTRINSIC(ldexp) \ + SKSL_INTRINSIC(length) \ + SKSL_INTRINSIC(lessThanEqual) \ + SKSL_INTRINSIC(lessThan) \ + SKSL_INTRINSIC(log2) \ + SKSL_INTRINSIC(log) \ + SKSL_INTRINSIC(makeSampler2D) \ + SKSL_INTRINSIC(matrixCompMult) \ + SKSL_INTRINSIC(matrixInverse) \ + SKSL_INTRINSIC(max) \ + SKSL_INTRINSIC(min) \ + SKSL_INTRINSIC(mix) \ + SKSL_INTRINSIC(modf) \ + SKSL_INTRINSIC(mod) \ + SKSL_INTRINSIC(normalize) \ + SKSL_INTRINSIC(notEqual) \ + SKSL_INTRINSIC(not ) \ + SKSL_INTRINSIC(outerProduct) \ + SKSL_INTRINSIC(packDouble2x32) \ + SKSL_INTRINSIC(packHalf2x16) \ + SKSL_INTRINSIC(packSnorm2x16) \ + SKSL_INTRINSIC(packSnorm4x8) \ + SKSL_INTRINSIC(packUnorm2x16) \ + SKSL_INTRINSIC(packUnorm4x8) \ + SKSL_INTRINSIC(pow) \ + SKSL_INTRINSIC(radians) \ + SKSL_INTRINSIC(read) \ + SKSL_INTRINSIC(reflect) \ + SKSL_INTRINSIC(refract) \ + SKSL_INTRINSIC(roundEven) \ + SKSL_INTRINSIC(round) \ + SKSL_INTRINSIC(sample) \ + SKSL_INTRINSIC(sampleGrad) \ + SKSL_INTRINSIC(sampleLod) \ + SKSL_INTRINSIC(saturate) \ + SKSL_INTRINSIC(sign) \ + SKSL_INTRINSIC(sinh) \ + SKSL_INTRINSIC(sin) \ + SKSL_INTRINSIC(smoothstep) \ + SKSL_INTRINSIC(sqrt) \ + SKSL_INTRINSIC(step) \ + SKSL_INTRINSIC(storageBarrier) \ + SKSL_INTRINSIC(subpassLoad) \ + SKSL_INTRINSIC(tanh) \ + SKSL_INTRINSIC(tan) \ + SKSL_INTRINSIC(toLinearSrgb) \ + SKSL_INTRINSIC(transpose) \ + SKSL_INTRINSIC(trunc) \ + SKSL_INTRINSIC(uintBitsToFloat) \ + SKSL_INTRINSIC(unpackDouble2x32) \ + SKSL_INTRINSIC(unpackHalf2x16) \ + SKSL_INTRINSIC(unpackSnorm2x16) \ + SKSL_INTRINSIC(unpackSnorm4x8) \ + SKSL_INTRINSIC(unpackUnorm2x16) \ + SKSL_INTRINSIC(unpackUnorm4x8) \ + SKSL_INTRINSIC(width) \ + SKSL_INTRINSIC(workgroupBarrier) \ + SKSL_INTRINSIC(write) + +namespace SkSL { + +// The `IntrinsicKind` enum holds every intrinsic supported by SkSL. +#define SKSL_INTRINSIC(name) k_##name##_IntrinsicKind, +enum IntrinsicKind : int8_t { + kNotIntrinsic = -1, + SKSL_INTRINSIC_LIST +}; +#undef SKSL_INTRINSIC + +// Returns a map which allows IntrinsicKind values to be looked up by name. +using IntrinsicMap = SkTHashMap; +const IntrinsicMap& GetIntrinsicMap(); + +// Looks up intrinsic functions by name. +IntrinsicKind FindIntrinsicKind(std::string_view functionName); + +} + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLLexer.cpp b/gfx/skia/skia/src/sksl/SkSLLexer.cpp new file mode 100644 index 0000000000..10c1108c09 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLLexer.cpp @@ -0,0 +1,808 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +/***************************************************************************************** + ******************** This file was generated by sksllex. Do not edit. ******************* + *****************************************************************************************/ +#include "src/sksl/SkSLLexer.h" + +namespace SkSL { + +using State = uint16_t; +static constexpr uint8_t kInvalidChar = 18; +static constexpr int8_t kMappings[118] = { + 1, 2, 3, 3, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 1, 4, 3, 5, 6, 7, 8, 3, 9, 10, 11, 12, 13, 14, 15, 16, 17, + 18, 19, 20, 21, 22, 22, 22, 23, 23, 24, 25, 26, 27, 28, 29, 3, 30, 30, 31, 32, + 33, 30, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 35, 36, 34, 37, 34, 34, 38, + 34, 34, 39, 3, 40, 41, 42, 3, 43, 44, 45, 46, 47, 48, 49, 50, 51, 34, 52, 53, + 54, 55, 56, 57, 34, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70}; +using IndexEntry = int16_t; +struct FullEntry { + State data[71]; +}; +struct CompactEntry { + uint32_t values; + uint8_t data[18]; +}; +static constexpr FullEntry kFull[] = { + { + 0, 2, 3, 4, 5, 7, 9, 23, 25, 28, 29, 30, 32, 35, 36, + 39, 44, 50, 69, 69, 69, 69, 69, 69, 71, 72, 73, 77, 79, 83, + 84, 84, 84, 84, 84, 84, 84, 84, 84, 86, 87, 88, 84, 91, 104, + 114, 130, 150, 162, 178, 183, 191, 84, 215, 225, 232, 258, 263, 279, 291, + 345, 362, 378, 390, 84, 84, 84, 411, 412, 415, 416, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 51, 0, 59, 59, 59, 59, 59, 59, 60, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, 0, 0, 0, 66, 67, 0, 0, 0, 0, 0, 0, 0, 0, 61, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 66, 0, 0, 67, 0, 0, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 51, 0, 59, 59, 59, 59, 59, 59, 60, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, 0, 0, 0, 65, 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 65, 0, 0, 0, 0, 0, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 51, 0, 60, 60, 60, 60, 60, 60, 60, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 51, 0, 70, 70, 70, 70, 70, 70, 70, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, 0, 0, 0, 66, 0, 0, 0, 0, 0, 0, 0, 0, 0, 61, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 66, 0, 0, 0, 0, 0, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 115, 85, 85, 85, 85, 85, 85, 85, 85, 85, 118, + 85, 85, 121, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 85, 85, 85, 85, 131, 85, 85, 85, 137, 85, 85, + 85, 85, 143, 85, 85, 85, 85, 85, 147, 85, 85, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 151, + 85, 154, 85, 85, 85, 85, 85, 85, 85, 85, 156, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 163, 85, 85, 85, 85, 85, 85, 85, 167, 85, 170, + 85, 85, 173, 85, 85, 85, 85, 85, 175, 85, 85, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 194, + 85, 85, 198, 201, 85, 85, 203, 85, 209, 85, 85, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 264, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 85, 268, 85, 85, 275, 85, 85, 85, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 292, 85, 85, 85, 85, 85, 85, 85, 324, 85, 85, + 85, 85, 85, 85, 85, 85, 328, 336, 85, 340, 85, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 298, 305, 316, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 321, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 85, 85, 85, 85, 346, 85, 85, 352, 85, 85, 85, + 85, 85, 85, 85, 354, 85, 85, 85, 85, 85, 85, 357, 85, 0, 0, 0, 0, + }, + { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 85, + 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, 0, 0, 85, 85, 85, 85, 85, 85, + 85, 85, 85, 0, 0, 0, 85, 85, 85, 85, 85, 85, 85, 85, 391, 85, 85, 85, + 85, 85, 395, 85, 403, 85, 85, 85, 85, 85, 85, 85, 85, 0, 0, 0, 0, + }, +}; +static constexpr CompactEntry kCompact[] = { + {0, + {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {3, + {195, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {6, + {255, 255, 255, 255, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {8, {255, 255, 255, 255, 255, 255, 255, 15, 0, 192, 15, 0, 0, 0, 0, 0, 192, 63}}, + {8, {255, 255, 255, 255, 3, 0, 255, 15, 0, 192, 15, 0, 0, 0, 0, 0, 192, 63}}, + {19 | (11 << 9) | (10 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 175, 106, 170, 170, 162, 170, 234, 63}}, + {10, {255, 255, 255, 255, 3, 0, 255, 15, 0, 192, 15, 0, 0, 0, 0, 0, 192, 63}}, + {14 | (12 << 9) | (10 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 175, 170, 170, 170, 106, 170, 232, 63}}, + {13 | (10 << 9), + {255, 255, 255, 255, 87, 84, 255, 95, 85, 213, 95, 85, 85, 85, 85, 85, 213, 63}}, + {15 | (10 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 81, 85, 213, 63}}, + {16 | (10 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {17 | (10 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {18 | (10 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {20 | (10 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 81, 213, 63}}, + {21 | (10 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {22 | (10 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {24, + {255, 255, 255, 255, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {27 | (26 << 9), + {255, 255, 253, 255, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {31, + {255, 255, 255, 255, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {34 | (33 << 9), + {255, 255, 255, 253, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {38 | (37 << 9), + {255, 255, 255, 223, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {40, {255, 255, 255, 255, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {41 | (40 << 9), + {255, 255, 255, 255, 87, 85, 255, 255, 243, 255, 255, 63, 255, 255, 255, 255, 255, 63}}, + {43 | (42 << 9), + {255, 255, 255, 221, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {43, {255, 255, 255, 255, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {49 | (48 << 9) | (45 << 18), + {255, 255, 191, 255, 253, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {46 | (45 << 9), {87, 85, 21, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 21}}, + {47 | (45 << 9), {87, 85, 85, 85, 84, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 21}}, + {48, {51, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, + {56 | (52 << 9), + {255, 255, 255, 255, 87, 85, 255, 255, 243, 255, 255, 63, 255, 255, 255, 255, 255, 63}}, + {53 | (52 << 9), + {255, 255, 255, 255, 87, 85, 255, 255, 243, 255, 255, 63, 255, 255, 255, 255, 255, 63}}, + {55 | (54 << 9), + {255, 255, 255, 221, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {55, {255, 255, 255, 255, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {58 | (57 << 9), + {255, 255, 255, 221, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {58, {255, 255, 255, 255, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {63 | (62 << 9), + {255, 255, 255, 221, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {63, {255, 255, 255, 255, 3, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {68, {255, 255, 255, 255, 3, 0, 255, 15, 240, 255, 63, 0, 252, 255, 255, 255, 255, 63}}, + {68 | (66 << 9), + {255, 255, 255, 255, 3, 0, 255, 15, 240, 247, 63, 0, 252, 255, 255, 247, 255, 63}}, + {76 | (74 << 9), + {255, 255, 255, 255, 255, 255, 31, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {75, + {255, 255, 255, 255, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {78, + {255, 255, 255, 255, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {81 | (80 << 9), + {255, 255, 255, 255, 255, 255, 127, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {82, + {255, 255, 255, 255, 255, 255, 63, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 63}}, + {85, {255, 255, 255, 255, 3, 0, 255, 15, 0, 192, 15, 0, 0, 0, 0, 0, 192, 63}}, + {90 | (89 << 9), + {255, 255, 255, 255, 255, 255, 127, 255, 255, 255, 243, 255, 255, 255, 255, 255, 255, 63}}, + {94 | (92 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 175, 170, 170, 170, 106, 168, 234, 63}}, + {93 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 69, 85, 85, 213, 63}}, + {98 | (95 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 175, 170, 170, 170, 169, 168, 234, 63}}, + {96 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 69, 85, 85, 213, 63}}, + {97 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {93 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 81, 85, 85, 85, 85, 213, 63}}, + {99 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {100 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {101 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 84, 85, 85, 85, 85, 213, 63}}, + {102 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 81, 213, 63}}, + {103 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {93 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {109 | 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95, 85, 213, 95, 85, 85, 85, 21, 85, 213, 63}}, + {273 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {274 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {93 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 21, 85, 85, 213, 63}}, + {276 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 84, 85, 85, 85, 85, 213, 63}}, + {277 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {278 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {280 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {287 | (281 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 111, 170, 170, 170, 170, 168, 234, 63}}, + {282 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 69, 85, 85, 85, 85, 213, 63}}, + {283 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {284 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 21, 85, 85, 213, 63}}, + {285 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {286 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 85, 209, 63}}, + {288 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 81, 213, 63}}, + {289 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {290 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 21, 85, 85, 213, 63}}, + {293 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 69, 85, 85, 213, 63}}, + {294 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 81, 85, 213, 63}}, + {295 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {296 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {297 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {299 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 84, 213, 95, 85, 85, 85, 85, 85, 213, 63}}, + {300 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 212, 95, 85, 85, 85, 85, 85, 213, 63}}, + {301 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 69, 85, 85, 85, 213, 63}}, + {302 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 31, 85, 85, 85, 85, 85, 213, 63}}, + {303 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 69, 85, 85, 85, 85, 213, 63}}, + {304 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {93 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 21, 213, 63}}, + {306 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 84, 213, 95, 85, 85, 85, 85, 85, 213, 63}}, + {307 | (300 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 42, 233, 175, 170, 170, 170, 170, 170, 234, 63}}, + {308 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {309 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 81, 85, 85, 85, 85, 213, 63}}, + {310 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {311 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 212, 95, 85, 85, 85, 85, 85, 213, 63}}, + {312 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 69, 85, 85, 85, 213, 63}}, + {313 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 31, 85, 85, 85, 85, 85, 213, 63}}, + {314 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 69, 85, 85, 85, 85, 213, 63}}, + {315 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {317 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 84, 213, 95, 85, 85, 85, 85, 85, 213, 63}}, + {318 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 21, 213, 95, 85, 85, 85, 85, 85, 213, 63}}, + {319 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {320 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 81, 85, 85, 85, 85, 213, 63}}, + {322 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 81, 213, 63}}, + {323 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 84, 85, 85, 85, 85, 213, 63}}, + {325 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 85, 197, 63}}, + {326 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {327 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {93 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 84, 85, 85, 85, 213, 63}}, + {332 | (329 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 111, 170, 170, 170, 138, 170, 234, 63}}, + {330 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {331 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {333 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 81, 213, 63}}, + {334 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 81, 85, 85, 85, 85, 213, 63}}, + {335 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {337 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 81, 85, 213, 63}}, + {338 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {339 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {93 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 81, 85, 213, 63}}, + {341 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {342 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {343 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 81, 85, 85, 85, 85, 213, 63}}, + {344 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 69, 85, 85, 85, 213, 63}}, + {347 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 69, 85, 85, 213, 63}}, + {348 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 81, 85, 213, 63}}, + {349 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {350 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 31, 85, 85, 85, 85, 85, 213, 63}}, + {351 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {353 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {355 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 81, 213, 63}}, + {356 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {358 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 81, 85, 213, 63}}, + {359 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {360 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 69, 85, 85, 85, 85, 213, 63}}, + {361 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {375 | (363 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 175, 170, 170, 106, 42, 170, 234, 63}}, + {370 | (364 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 175, 170, 106, 170, 42, 170, 234, 63}}, + {369 | (365 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 175, 170, 169, 170, 168, 170, 234, 63}}, + {366 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {367 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {368 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 69, 85, 85, 213, 63}}, + {371 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {372 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 81, 85, 85, 85, 213, 63}}, + {373 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 21, 85, 85, 213, 63}}, + {374 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {376 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {377 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 21, 85, 85, 213, 63}}, + {384 | (379 << 9) | (85 << 18), + {255, 255, 255, 255, 171, 170, 255, 175, 170, 234, 111, 170, 170, 170, 168, 170, 234, 63}}, + {380 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {381 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 85, 209, 63}}, + {382 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {383 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 21, 85, 85, 213, 63}}, + {385 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {386 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 31, 85, 85, 85, 85, 85, 213, 63}}, + {387 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {388 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {389 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {392 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {393 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {394 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {396 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {397 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 84, 85, 85, 213, 63}}, + {398 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 81, 85, 85, 85, 213, 63}}, + {399 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 69, 85, 213, 63}}, + {400 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {401 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 81, 213, 63}}, + {402 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 81, 85, 213, 63}}, + {404 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 21, 85, 85, 85, 213, 63}}, + {405 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 84, 213, 63}}, + {406 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 21, 85, 85, 85, 85, 213, 63}}, + {407 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 84, 85, 213, 63}}, + {408 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 21, 85, 85, 213, 63}}, + {409 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 81, 85, 85, 213, 63}}, + {410 | (85 << 9), + {255, 255, 255, 255, 87, 85, 255, 95, 85, 213, 95, 85, 85, 85, 85, 85, 209, 63}}, + {414 | (413 << 9), + {255, 255, 255, 255, 255, 255, 127, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 60}}, +}; +static constexpr IndexEntry kIndices[] = { + 0, -1, 1, 1, 0, 2, 0, 3, 4, 5, 6, 7, 8, 6, 9, 10, 11, 12, + 6, 13, 14, 15, 6, 16, 0, 17, 0, 0, 0, 0, 18, 0, 19, 0, 0, 0, + 20, 0, 0, 21, 22, 23, 24, 24, 25, 26, 27, 0, 28, 0, -2, 29, 30, 31, + 32, 32, 33, 34, 34, -3, -4, 35, 36, 36, 0, 0, 0, 37, 38, -5, -5, 0, + 0, 39, 40, 0, 0, 41, 0, 42, 0, 43, 0, 0, 44, 44, 0, 0, 45, 0, + 0, 46, 47, 44, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, + 44, 62, 63, 64, 65, 44, -6, 66, 67, 44, 68, 69, 70, 71, 72, 73, 44, 74, + 75, 76, 77, 44, -7, 78, 79, 80, 81, 82, 44, 83, 84, 85, 86, 87, 44, 88, + 89, 90, 57, 91, 92, 93, -8, 94, 95, 44, 96, 47, 97, 98, 99, 100, 101, 102, + -9, 103, 104, 105, 44, 106, 107, 108, 109, 110, 44, 111, 44, 112, 113, 93, 114, 115, + 116, 117, 118, 119, 120, 121, 122, 44, 123, 124, 93, 125, 44, -10, 126, 127, 128, 44, + 129, 130, 44, 131, 132, 133, 134, 135, 136, 137, 57, 138, 139, 140, 141, 142, 132, 143, + 144, 145, 146, 147, 44, 148, 149, 150, 44, 151, 152, 153, 154, 155, 156, 44, 157, 158, + 159, 160, 161, 162, 163, 57, 164, 165, 166, 167, 168, 169, 44, 170, 171, 172, 173, 174, + 175, 176, 177, 178, 179, 44, 180, 181, 182, 183, 132, -11, 184, 185, 186, 108, 187, 188, + 189, 190, 191, 192, 193, 194, 195, 196, 51, 197, 198, 199, 200, 201, 202, 203, 44, 204, + 205, 206, 44, -12, 207, 208, 209, 210, 211, -13, 212, 213, 214, 215, 216, 217, 218, 219, + 220, 221, 222, 223, 224, 225, 226, 227, 228, 218, 229, 230, 231, 232, 132, 233, 234, 57, + 235, 236, 237, 238, 239, 240, 241, 51, 242, 243, 244, 44, 245, 246, 247, 248, 249, 250, + 251, 252, 44, -14, 253, 254, 255, 256, 257, 57, 258, 70, 259, 260, 44, 261, 262, 263, + 264, 238, 265, 266, 267, 268, 269, 270, 44, 193, 271, 272, 273, 274, 108, 275, 276, 149, + 277, 278, 279, 280, 281, 149, 282, 283, 284, 285, 286, 57, -15, 287, 288, 289, 44, 290, + 291, 292, 293, 294, 295, 296, 44, 297, 298, 299, 300, 301, 302, 303, 44, 0, 304, 0, + 0, 0, 0, +}; +State get_transition(int transition, int state) { + IndexEntry index = kIndices[state]; + if (index < 0) { + return kFull[~index].data[transition]; + } + const CompactEntry& entry = kCompact[index]; + int v = entry.data[transition >> 2]; + v >>= 2 * (transition & 3); + v &= 3; + v *= 9; + return (entry.values >> v) & 511; +} +static const int8_t kAccepts[417] = { + -1, -1, 88, 88, 91, 67, 72, 91, 42, 40, 40, 40, 40, 36, 40, 40, 40, 40, 37, 40, 40, 40, + 27, 57, 81, 62, 66, 86, 43, 44, 55, 79, 53, 51, 77, 50, 54, 52, 78, 49, 1, -1, -1, 1, + 56, -1, -1, 90, 89, 80, 2, 1, 1, -1, -1, 1, -1, -1, 1, 2, 3, -1, -1, 1, 3, 2, + 2, -1, 2, 2, 2, 69, 87, 74, 58, 82, 76, 70, 71, 73, 75, 59, 83, 68, 41, 41, 47, 48, + 61, 85, 65, 41, 41, 39, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 14, 41, + 41, 41, 41, 30, 41, 41, 41, 12, 41, 41, 41, 41, 41, 41, 22, 41, 41, 41, 41, 15, 41, 41, + 41, 41, 41, 41, 13, 41, 41, 41, 41, 41, 16, 10, 41, 41, 41, 41, 41, 41, 41, 41, 41, 7, + 41, 41, 41, 41, 41, 41, 39, 41, 41, 41, 41, 41, 5, 41, 41, 41, 41, 41, 23, 41, 8, 41, + 41, 41, 41, 41, 39, 41, 41, 41, 41, 41, 41, 33, 41, 41, 41, 41, 6, 18, 41, 41, 41, 25, + 41, 41, 20, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, + 32, 41, 41, 41, 35, 41, 41, 41, 41, 41, 41, 34, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, + 41, 41, 41, 41, 26, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 24, 41, 41, 19, 41, 41, 41, + 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, + 28, 41, 41, 41, 17, 41, 41, 41, 41, 41, 41, 41, 41, 39, 41, 41, 41, 41, 41, 41, 41, 41, + 41, 41, 41, 41, 41, 41, 41, 41, 41, 39, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, + 41, 41, 41, 41, 41, 31, 41, 41, 41, 41, 41, 41, 41, 41, 11, 41, 41, 41, 41, 41, 41, 41, + 41, 41, 41, 41, 4, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 21, 41, 41, 41, 41, 41, + 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 9, 41, + 41, 41, 41, 41, 41, 41, 38, 41, 41, 41, 41, 41, 41, 41, 29, 45, 60, 84, 64, 46, 63, +}; + +Token Lexer::next() { + // note that we cheat here: normally a lexer needs to worry about the case + // where a token has a prefix which is not itself a valid token - for instance, + // maybe we have a valid token 'while', but 'w', 'wh', etc. are not valid + // tokens. Our grammar doesn't have this property, so we can simplify the logic + // a bit. + int32_t startOffset = fOffset; + State state = 1; + for (;;) { + if (fOffset >= (int32_t)fText.length()) { + if (startOffset == (int32_t)fText.length() || kAccepts[state] == -1) { + return Token(Token::Kind::TK_END_OF_FILE, startOffset, 0); + } + break; + } + uint8_t c = (uint8_t)(fText[fOffset] - 9); + if (c >= 118) { + c = kInvalidChar; + } + State newState = get_transition(kMappings[c], state); + if (!newState) { + break; + } + state = newState; + ++fOffset; + } + Token::Kind kind = (Token::Kind)kAccepts[state]; + return Token(kind, startOffset, fOffset - startOffset); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLLexer.h b/gfx/skia/skia/src/sksl/SkSLLexer.h new file mode 100644 index 0000000000..1cd81a66b7 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLLexer.h @@ -0,0 +1,145 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +/***************************************************************************************** + ******************** This file was generated by sksllex. Do not edit. ******************* + *****************************************************************************************/ +#ifndef SKSL_Lexer +#define SKSL_Lexer +#include +#include +namespace SkSL { + +struct Token { + enum class Kind { + TK_END_OF_FILE, + TK_FLOAT_LITERAL, + TK_INT_LITERAL, + TK_BAD_OCTAL, + TK_TRUE_LITERAL, + TK_FALSE_LITERAL, + TK_IF, + TK_ELSE, + TK_FOR, + TK_WHILE, + TK_DO, + TK_SWITCH, + TK_CASE, + TK_DEFAULT, + TK_BREAK, + TK_CONTINUE, + TK_DISCARD, + TK_RETURN, + TK_IN, + TK_OUT, + TK_INOUT, + TK_UNIFORM, + TK_CONST, + TK_FLAT, + TK_NOPERSPECTIVE, + TK_INLINE, + TK_NOINLINE, + TK_PURE, + TK_READONLY, + TK_WRITEONLY, + TK_BUFFER, + TK_STRUCT, + TK_LAYOUT, + TK_HIGHP, + TK_MEDIUMP, + TK_LOWP, + TK_ES3, + TK_EXPORT, + TK_WORKGROUP, + TK_RESERVED, + TK_PRIVATE_IDENTIFIER, + TK_IDENTIFIER, + TK_DIRECTIVE, + TK_LPAREN, + TK_RPAREN, + TK_LBRACE, + TK_RBRACE, + TK_LBRACKET, + TK_RBRACKET, + TK_DOT, + TK_COMMA, + TK_PLUSPLUS, + TK_MINUSMINUS, + TK_PLUS, + TK_MINUS, + TK_STAR, + TK_SLASH, + TK_PERCENT, + TK_SHL, + TK_SHR, + TK_BITWISEOR, + TK_BITWISEXOR, + TK_BITWISEAND, + TK_BITWISENOT, + TK_LOGICALOR, + TK_LOGICALXOR, + TK_LOGICALAND, + TK_LOGICALNOT, + TK_QUESTION, + TK_COLON, + TK_EQ, + TK_EQEQ, + TK_NEQ, + TK_GT, + TK_LT, + TK_GTEQ, + TK_LTEQ, + TK_PLUSEQ, + TK_MINUSEQ, + TK_STAREQ, + TK_SLASHEQ, + TK_PERCENTEQ, + TK_SHLEQ, + TK_SHREQ, + TK_BITWISEOREQ, + TK_BITWISEXOREQ, + TK_BITWISEANDEQ, + TK_SEMICOLON, + TK_WHITESPACE, + TK_LINE_COMMENT, + TK_BLOCK_COMMENT, + TK_INVALID, + TK_NONE, + }; + + Token() {} + Token(Kind kind, int32_t offset, int32_t length) + : fKind(kind), fOffset(offset), fLength(length) {} + + Kind fKind = Kind::TK_NONE; + int32_t fOffset = -1; + int32_t fLength = -1; +}; + +class Lexer { +public: + void start(std::string_view text) { + fText = text; + fOffset = 0; + } + + Token next(); + + struct Checkpoint { + int32_t fOffset; + }; + + Checkpoint getCheckpoint() const { return {fOffset}; } + + void rewindToCheckpoint(Checkpoint checkpoint) { fOffset = checkpoint.fOffset; } + +private: + std::string_view fText; + int32_t fOffset; +}; + +} // namespace SkSL +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLMangler.cpp b/gfx/skia/skia/src/sksl/SkSLMangler.cpp new file mode 100644 index 0000000000..650837d7aa --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLMangler.cpp @@ -0,0 +1,76 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLMangler.h" + +#include "include/core/SkString.h" +#include "include/core/SkTypes.h" +#include "src/base/SkStringView.h" +#include "src/sksl/ir/SkSLSymbolTable.h" + +#include +#include +#include + +namespace SkSL { + +std::string Mangler::uniqueName(std::string_view baseName, SymbolTable* symbolTable) { + SkASSERT(symbolTable); + + // Private names might begin with a $. Strip that off. + if (skstd::starts_with(baseName, '$')) { + baseName.remove_prefix(1); + } + + // The inliner runs more than once, so the base name might already have been mangled and have a + // prefix like "_123_x". Let's strip that prefix off to make the generated code easier to read. + if (skstd::starts_with(baseName, '_')) { + // Determine if we have a string of digits. + int offset = 1; + while (isdigit(baseName[offset])) { + ++offset; + } + // If we found digits, another underscore, and anything else, that's the mangler prefix. + // Strip it off. + if (offset > 1 && baseName[offset] == '_' && baseName[offset + 1] != '\0') { + baseName.remove_prefix(offset + 1); + } else { + // This name doesn't contain a mangler prefix, but it does start with an underscore. + // OpenGL disallows two consecutive underscores anywhere in the string, and we'll be + // adding one as part of the mangler prefix, so strip the leading underscore. + baseName.remove_prefix(1); + } + } + + // Append a unique numeric prefix to avoid name overlap. Check the symbol table to make sure + // we're not reusing an existing name. (Note that within a single compilation pass, this check + // isn't fully comprehensive, as code isn't always generated in top-to-bottom order.) + + // This code is a performance hotspot. Assemble the string manually to save a few cycles. + char uniqueName[256]; + uniqueName[0] = '_'; + char* uniqueNameEnd = uniqueName + std::size(uniqueName); + for (;;) { + // _123 + char* endPtr = SkStrAppendS32(uniqueName + 1, fCounter++); + + // _123_ + *endPtr++ = '_'; + + // _123_baseNameTruncatedToFit (no null terminator, because string_view doesn't require one) + int baseNameCopyLength = std::min(baseName.size(), uniqueNameEnd - endPtr); + memcpy(endPtr, baseName.data(), baseNameCopyLength); + endPtr += baseNameCopyLength; + + std::string_view uniqueNameView(uniqueName, endPtr - uniqueName); + if (symbolTable->find(uniqueNameView) == nullptr) { + return std::string(uniqueNameView); + } + } +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLMangler.h b/gfx/skia/skia/src/sksl/SkSLMangler.h new file mode 100644 index 0000000000..8c0dd5e6e0 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLMangler.h @@ -0,0 +1,35 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_MANGLER +#define SKSL_MANGLER + +#include +#include + +namespace SkSL { + +class SymbolTable; + +class Mangler { +public: + /** + * Mangles baseName to create a name that is unique within symbolTable. + */ + std::string uniqueName(std::string_view baseName, SymbolTable* symbolTable); + + void reset() { + fCounter = 0; + } + +private: + int fCounter = 0; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLMemoryLayout.h b/gfx/skia/skia/src/sksl/SkSLMemoryLayout.h new file mode 100644 index 0000000000..8389c00346 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLMemoryLayout.h @@ -0,0 +1,211 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKIASL_MEMORYLAYOUT +#define SKIASL_MEMORYLAYOUT + +#include + +#include "src/sksl/ir/SkSLType.h" + +namespace SkSL { + +class MemoryLayout { +public: + enum class Standard { + // GLSL std140 layout as described in OpenGL Spec v4.5, 7.6.2.2. + k140, + + // GLSL std430 layout. This layout is like std140 but with optimizations. This layout can + // ONLY be used with shader storage blocks. + k430, + + // MSL memory layout. + kMetal, + + // WebGPU Shading Language buffer layout constraints for the uniform address space. + kWGSLUniform, + + // WebGPU Shading Language buffer layout constraints for the storage address space. + kWGSLStorage, + }; + + MemoryLayout(Standard std) + : fStd(std) {} + + bool isWGSL() const { return fStd == Standard::kWGSLUniform || fStd == Standard::kWGSLStorage; } + + bool isMetal() const { return fStd == Standard::kMetal; } + + /** + * WGSL and std140 require various types of variables (structs, arrays, and matrices) in the + * uniform address space to be rounded up to the nearest multiple of 16. This function performs + * the rounding depending on the given `type` and the current memory layout standard. + * + * (For WGSL, see https://www.w3.org/TR/WGSL/#address-space-layout-constraints). + */ + size_t roundUpIfNeeded(size_t raw, Type::TypeKind type) const { + if (fStd == Standard::k140) { + return roundUp16(raw); + } + // WGSL uniform matrix layout is simply the alignment of the matrix columns and + // doesn't have a 16-byte multiple alignment constraint. + if (fStd == Standard::kWGSLUniform && type != Type::TypeKind::kMatrix) { + return roundUp16(raw); + } + return raw; + } + + /** + * Rounds up the integer `n` to the smallest multiple of 16 greater than `n`. + */ + size_t roundUp16(size_t n) const { return (n + 15) & ~15; } + + /** + * Returns a type's required alignment when used as a standalone variable. + */ + size_t alignment(const Type& type) const { + // See OpenGL Spec 7.6.2.2 Standard Uniform Block Layout + switch (type.typeKind()) { + case Type::TypeKind::kScalar: + case Type::TypeKind::kAtomic: + return this->size(type); + case Type::TypeKind::kVector: + return GetVectorAlignment(this->size(type.componentType()), type.columns()); + case Type::TypeKind::kMatrix: + return this->roundUpIfNeeded( + GetVectorAlignment(this->size(type.componentType()), type.rows()), + type.typeKind()); + case Type::TypeKind::kArray: + return this->roundUpIfNeeded(this->alignment(type.componentType()), + type.typeKind()); + case Type::TypeKind::kStruct: { + size_t result = 0; + for (const auto& f : type.fields()) { + size_t alignment = this->alignment(*f.fType); + if (alignment > result) { + result = alignment; + } + } + return this->roundUpIfNeeded(result, type.typeKind()); + } + default: + SK_ABORT("cannot determine alignment of type %s", type.displayName().c_str()); + } + } + + /** + * For matrices and arrays, returns the number of bytes from the start of one entry (row, in + * the case of matrices) to the start of the next. + */ + size_t stride(const Type& type) const { + switch (type.typeKind()) { + case Type::TypeKind::kMatrix: + return this->alignment(type); + case Type::TypeKind::kArray: { + int stride = this->size(type.componentType()); + if (stride > 0) { + int align = this->alignment(type.componentType()); + stride += align - 1; + stride -= stride % align; + stride = this->roundUpIfNeeded(stride, type.typeKind()); + } + return stride; + } + default: + SK_ABORT("type does not have a stride"); + } + } + + /** + * Returns the size of a type in bytes. Returns 0 if the given type is not supported. + */ + size_t size(const Type& type) const { + switch (type.typeKind()) { + case Type::TypeKind::kScalar: + if (type.isBoolean()) { + if (this->isWGSL()) { + return 0; + } + return 1; + } + if ((this->isMetal() || this->isWGSL()) && !type.highPrecision() && + type.isNumber()) { + return 2; + } + return 4; + case Type::TypeKind::kAtomic: + // Our atomic types (currently atomicUint) always occupy 4 bytes. + return 4; + case Type::TypeKind::kVector: + if (this->isMetal() && type.columns() == 3) { + return 4 * this->size(type.componentType()); + } + return type.columns() * this->size(type.componentType()); + case Type::TypeKind::kMatrix: // fall through + case Type::TypeKind::kArray: + return type.isUnsizedArray() ? 0 : (type.columns() * this->stride(type)); + case Type::TypeKind::kStruct: { + size_t total = 0; + for (const auto& f : type.fields()) { + size_t alignment = this->alignment(*f.fType); + if (total % alignment != 0) { + total += alignment - total % alignment; + } + SkASSERT(total % alignment == 0); + total += this->size(*f.fType); + } + size_t alignment = this->alignment(type); + SkASSERT(!type.fields().size() || + (0 == alignment % this->alignment(*type.fields()[0].fType))); + return (total + alignment - 1) & ~(alignment - 1); + } + default: + SK_ABORT("cannot determine size of type %s", type.displayName().c_str()); + } + } + + /** + * Not all types are compatible with memory layout. + */ + size_t isSupported(const Type& type) const { + switch (type.typeKind()) { + case Type::TypeKind::kAtomic: + return true; + + case Type::TypeKind::kScalar: + // bool and short are not host-shareable in WGSL. + return !this->isWGSL() || + (!type.isBoolean() && (type.isFloat() || type.highPrecision())); + + case Type::TypeKind::kVector: + case Type::TypeKind::kMatrix: + case Type::TypeKind::kArray: + return this->isSupported(type.componentType()); + + case Type::TypeKind::kStruct: + return std::all_of( + type.fields().begin(), type.fields().end(), [this](const Type::Field& f) { + return this->isSupported(*f.fType); + }); + + default: + return false; + } + } + +private: + static size_t GetVectorAlignment(size_t componentSize, int columns) { + return componentSize * (columns + columns % 2); + } + + const Standard fStd; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLMemoryPool.h b/gfx/skia/skia/src/sksl/SkSLMemoryPool.h new file mode 100644 index 0000000000..0d16d84ac0 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLMemoryPool.h @@ -0,0 +1,44 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_MEMORYPOOL +#define SKSL_MEMORYPOOL + +#include + +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) + +#include "src/gpu/ganesh/GrMemoryPool.h" + +namespace SkSL { +using MemoryPool = ::GrMemoryPool; +} + +#else + +// When Ganesh is disabled, GrMemoryPool is not linked in. We include a minimal class which mimics +// the GrMemoryPool interface but simply redirects to the system allocator. +namespace SkSL { + +class MemoryPool { +public: + static std::unique_ptr Make(size_t, size_t) { + return std::make_unique(); + } + void resetScratchSpace() {} + void reportLeaks() const {} + bool isEmpty() const { return true; } + void* allocate(size_t size) { return ::operator new(size); } + void release(void* p) { ::operator delete(p); } +}; + +} // namespace SkSL + +#endif // defined(SK_GANESH) +#endif // SKSL_MEMORYPOOL diff --git a/gfx/skia/skia/src/sksl/SkSLModifiersPool.h b/gfx/skia/skia/src/sksl/SkSLModifiersPool.h new file mode 100644 index 0000000000..e9b863c871 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLModifiersPool.h @@ -0,0 +1,38 @@ +/* + * Copyright 2020 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_MODIFIERSPOOL +#define SKSL_MODIFIERSPOOL + +#include "include/private/SkSLModifiers.h" + +#include + +namespace SkSL { + +/** + * Deduplicates Modifiers objects and stores them in a shared pool. Modifiers are fairly heavy, and + * tend to be reused a lot, so deduplication can be a significant win. + */ +class ModifiersPool { +public: + const Modifiers* add(const Modifiers& modifiers) { + auto [iter, wasInserted] = fModifiersSet.insert(modifiers); + return &*iter; + } + + void clear() { + fModifiersSet.clear(); + } + +private: + std::unordered_set fModifiersSet; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLModuleLoader.cpp b/gfx/skia/skia/src/sksl/SkSLModuleLoader.cpp new file mode 100644 index 0000000000..c164fc1fe6 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLModuleLoader.cpp @@ -0,0 +1,444 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "src/sksl/SkSLModuleLoader.h" + +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLProgramKind.h" +#include "include/private/base/SkMutex.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLModifiersPool.h" +#include "src/sksl/ir/SkSLSymbolTable.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVariable.h" + +#include +#include +#include +#include +#include + +#if SKSL_STANDALONE + +#include "include/core/SkString.h" +#include "src/utils/SkOSPath.h" +#include "tools/SkGetExecutablePath.h" + + // In standalone mode, we load the original SkSL source files. GN is responsible for copying + // these files from src/sksl/ to the directory where the executable is located. + #include + + static std::string load_module_file(const char* moduleFilename) { + std::string exePath = SkGetExecutablePath(); + SkString exeDir = SkOSPath::Dirname(exePath.c_str()); + SkString modulePath = SkOSPath::Join(exeDir.c_str(), moduleFilename); + std::ifstream in(std::string{modulePath.c_str()}); + std::string moduleSource{std::istreambuf_iterator(in), + std::istreambuf_iterator()}; + if (in.rdstate()) { + SK_ABORT("Error reading %s\n", modulePath.c_str()); + } + return moduleSource; + } + + #define MODULE_DATA(name) #name, load_module_file(#name ".sksl") + +#else + + // We include minified SkSL module code and pass it directly to the compiler. + #if defined(SK_ENABLE_OPTIMIZE_SIZE) || !defined(SK_DEBUG) + #include "src/sksl/generated/sksl_shared.minified.sksl" + #include "src/sksl/generated/sksl_compute.minified.sksl" + #include "src/sksl/generated/sksl_frag.minified.sksl" + #include "src/sksl/generated/sksl_gpu.minified.sksl" + #include "src/sksl/generated/sksl_public.minified.sksl" + #include "src/sksl/generated/sksl_rt_shader.minified.sksl" + #include "src/sksl/generated/sksl_vert.minified.sksl" + #if defined(SK_GRAPHITE) + #include "src/sksl/generated/sksl_graphite_frag.minified.sksl" + #include "src/sksl/generated/sksl_graphite_vert.minified.sksl" + #endif + #else + #include "src/sksl/generated/sksl_shared.unoptimized.sksl" + #include "src/sksl/generated/sksl_compute.unoptimized.sksl" + #include "src/sksl/generated/sksl_frag.unoptimized.sksl" + #include "src/sksl/generated/sksl_gpu.unoptimized.sksl" + #include "src/sksl/generated/sksl_public.unoptimized.sksl" + #include "src/sksl/generated/sksl_rt_shader.unoptimized.sksl" + #include "src/sksl/generated/sksl_vert.unoptimized.sksl" + #if defined(SK_GRAPHITE) + #include "src/sksl/generated/sksl_graphite_frag.unoptimized.sksl" + #include "src/sksl/generated/sksl_graphite_vert.unoptimized.sksl" + #endif + #endif + + #define MODULE_DATA(name) #name, std::string(SKSL_MINIFIED_##name) + +#endif + +namespace SkSL { + +#define TYPE(t) &BuiltinTypes::f ## t + +static constexpr BuiltinTypePtr kRootTypes[] = { + TYPE(Void), + + TYPE( Float), TYPE( Float2), TYPE( Float3), TYPE( Float4), + TYPE( Half), TYPE( Half2), TYPE( Half3), TYPE( Half4), + TYPE( Int), TYPE( Int2), TYPE( Int3), TYPE( Int4), + TYPE( UInt), TYPE( UInt2), TYPE( UInt3), TYPE( UInt4), + TYPE( Short), TYPE( Short2), TYPE( Short3), TYPE( Short4), + TYPE(UShort), TYPE(UShort2), TYPE(UShort3), TYPE(UShort4), + TYPE( Bool), TYPE( Bool2), TYPE( Bool3), TYPE( Bool4), + + TYPE(Float2x2), TYPE(Float2x3), TYPE(Float2x4), + TYPE(Float3x2), TYPE(Float3x3), TYPE(Float3x4), + TYPE(Float4x2), TYPE(Float4x3), TYPE(Float4x4), + + TYPE(Half2x2), TYPE(Half2x3), TYPE(Half2x4), + TYPE(Half3x2), TYPE(Half3x3), TYPE(Half3x4), + TYPE(Half4x2), TYPE(Half4x3), TYPE(Half4x4), + + TYPE(SquareMat), TYPE(SquareHMat), + TYPE(Mat), TYPE(HMat), + + // TODO(skia:12349): generic short/ushort + TYPE(GenType), TYPE(GenIType), TYPE(GenUType), + TYPE(GenHType), /* (GenSType) (GenUSType) */ + TYPE(GenBType), + TYPE(IntLiteral), + TYPE(FloatLiteral), + + TYPE(Vec), TYPE(IVec), TYPE(UVec), + TYPE(HVec), TYPE(SVec), TYPE(USVec), + TYPE(BVec), + + TYPE(ColorFilter), + TYPE(Shader), + TYPE(Blender), +}; + +static constexpr BuiltinTypePtr kPrivateTypes[] = { + TYPE(Sampler2D), TYPE(SamplerExternalOES), TYPE(Sampler2DRect), + + TYPE(SubpassInput), TYPE(SubpassInputMS), + + TYPE(Sampler), + TYPE(Texture2D), + TYPE(ReadWriteTexture2D), TYPE(ReadOnlyTexture2D), TYPE(WriteOnlyTexture2D), + TYPE(GenTexture2D), TYPE(ReadableTexture2D), TYPE(WritableTexture2D), + + TYPE(AtomicUInt), +}; + +#undef TYPE + +struct ModuleLoader::Impl { + Impl(); + + void makeRootSymbolTable(); + + // This mutex is taken when ModuleLoader::Get is called, and released when the returned + // ModuleLoader object falls out of scope. + SkMutex fMutex; + const BuiltinTypes fBuiltinTypes; + ModifiersPool fCoreModifiers; + + std::unique_ptr fRootModule; + + std::unique_ptr fSharedModule; // [Root] + Public intrinsics + std::unique_ptr fGPUModule; // [Shared] + Non-public intrinsics/ + // helper functions + std::unique_ptr fVertexModule; // [GPU] + Vertex stage decls + std::unique_ptr fFragmentModule; // [GPU] + Fragment stage decls + std::unique_ptr fComputeModule; // [GPU] + Compute stage decls + std::unique_ptr fGraphiteVertexModule; // [Vert] + Graphite vertex helpers + std::unique_ptr fGraphiteFragmentModule; // [Frag] + Graphite fragment helpers + + std::unique_ptr fPublicModule; // [Shared] minus Private types + + // Runtime effect intrinsics + std::unique_ptr fRuntimeShaderModule; // [Public] + Runtime shader decls +}; + +ModuleLoader ModuleLoader::Get() { + static ModuleLoader::Impl* sModuleLoaderImpl = new ModuleLoader::Impl; + return ModuleLoader(*sModuleLoaderImpl); +} + +ModuleLoader::ModuleLoader(ModuleLoader::Impl& m) : fModuleLoader(m) { + fModuleLoader.fMutex.acquire(); +} + +ModuleLoader::~ModuleLoader() { + fModuleLoader.fMutex.release(); +} + +void ModuleLoader::unloadModules() { + fModuleLoader.fSharedModule = nullptr; + fModuleLoader.fGPUModule = nullptr; + fModuleLoader.fVertexModule = nullptr; + fModuleLoader.fFragmentModule = nullptr; + fModuleLoader.fComputeModule = nullptr; + fModuleLoader.fGraphiteVertexModule = nullptr; + fModuleLoader.fGraphiteFragmentModule = nullptr; + fModuleLoader.fPublicModule = nullptr; + fModuleLoader.fRuntimeShaderModule = nullptr; +} + +ModuleLoader::Impl::Impl() { + this->makeRootSymbolTable(); +} + +static void add_compute_type_aliases(SkSL::SymbolTable* symbols, const SkSL::BuiltinTypes& types) { + // A `texture2D` in a compute shader should generally mean "read-write" texture access, not + // "sample" texture access. Remap the name `texture2D` to point to `readWriteTexture2D`. + symbols->inject(Type::MakeAliasType("texture2D", *types.fReadWriteTexture2D)); +} + +static std::unique_ptr compile_and_shrink(SkSL::Compiler* compiler, + ProgramKind kind, + const char* moduleName, + std::string moduleSource, + const Module* parent, + ModifiersPool& modifiersPool) { + std::unique_ptr m = compiler->compileModule(kind, + moduleName, + std::move(moduleSource), + parent, + modifiersPool, + /*shouldInline=*/true); + if (!m) { + SK_ABORT("Unable to load module %s", moduleName); + } + + // We can eliminate FunctionPrototypes without changing the meaning of the module; the function + // declaration is still safely in the symbol table. This only impacts our ability to recreate + // the input verbatim, which we don't care about at runtime. + m->fElements.erase(std::remove_if(m->fElements.begin(), m->fElements.end(), + [](const std::unique_ptr& element) { + switch (element->kind()) { + case ProgramElement::Kind::kFunction: + case ProgramElement::Kind::kGlobalVar: + case ProgramElement::Kind::kInterfaceBlock: + // We need to preserve these. + return false; + + case ProgramElement::Kind::kFunctionPrototype: + // These are already in the symbol table; the + // ProgramElement isn't needed anymore. + return true; + + default: + SkDEBUGFAILF("Unsupported element: %s\n", + element->description().c_str()); + return false; + } + }), + m->fElements.end()); + + m->fElements.shrink_to_fit(); + return m; +} + +const BuiltinTypes& ModuleLoader::builtinTypes() { + return fModuleLoader.fBuiltinTypes; +} + +ModifiersPool& ModuleLoader::coreModifiers() { + return fModuleLoader.fCoreModifiers; +} + +const Module* ModuleLoader::rootModule() { + return fModuleLoader.fRootModule.get(); +} + +void ModuleLoader::addPublicTypeAliases(const SkSL::Module* module) { + const SkSL::BuiltinTypes& types = this->builtinTypes(); + SymbolTable* symbols = module->fSymbols.get(); + + // Add some aliases to the runtime effect modules so that it's friendlier, and more like GLSL. + symbols->addWithoutOwnership(types.fVec2.get()); + symbols->addWithoutOwnership(types.fVec3.get()); + symbols->addWithoutOwnership(types.fVec4.get()); + + symbols->addWithoutOwnership(types.fIVec2.get()); + symbols->addWithoutOwnership(types.fIVec3.get()); + symbols->addWithoutOwnership(types.fIVec4.get()); + + symbols->addWithoutOwnership(types.fBVec2.get()); + symbols->addWithoutOwnership(types.fBVec3.get()); + symbols->addWithoutOwnership(types.fBVec4.get()); + + symbols->addWithoutOwnership(types.fMat2.get()); + symbols->addWithoutOwnership(types.fMat3.get()); + symbols->addWithoutOwnership(types.fMat4.get()); + + symbols->addWithoutOwnership(types.fMat2x2.get()); + symbols->addWithoutOwnership(types.fMat2x3.get()); + symbols->addWithoutOwnership(types.fMat2x4.get()); + symbols->addWithoutOwnership(types.fMat3x2.get()); + symbols->addWithoutOwnership(types.fMat3x3.get()); + symbols->addWithoutOwnership(types.fMat3x4.get()); + symbols->addWithoutOwnership(types.fMat4x2.get()); + symbols->addWithoutOwnership(types.fMat4x3.get()); + symbols->addWithoutOwnership(types.fMat4x4.get()); + + // Hide all the private symbols by aliasing them all to "invalid". This will prevent code from + // using built-in names like `sampler2D` as variable names. + for (BuiltinTypePtr privateType : kPrivateTypes) { + symbols->inject(Type::MakeAliasType((types.*privateType)->name(), *types.fInvalid)); + } +} + +const Module* ModuleLoader::loadPublicModule(SkSL::Compiler* compiler) { + if (!fModuleLoader.fPublicModule) { + const Module* sharedModule = this->loadSharedModule(compiler); + fModuleLoader.fPublicModule = compile_and_shrink(compiler, + ProgramKind::kFragment, + MODULE_DATA(sksl_public), + sharedModule, + this->coreModifiers()); + this->addPublicTypeAliases(fModuleLoader.fPublicModule.get()); + } + return fModuleLoader.fPublicModule.get(); +} + +const Module* ModuleLoader::loadPrivateRTShaderModule(SkSL::Compiler* compiler) { + if (!fModuleLoader.fRuntimeShaderModule) { + const Module* publicModule = this->loadPublicModule(compiler); + fModuleLoader.fRuntimeShaderModule = compile_and_shrink(compiler, + ProgramKind::kFragment, + MODULE_DATA(sksl_rt_shader), + publicModule, + this->coreModifiers()); + } + return fModuleLoader.fRuntimeShaderModule.get(); +} + +const Module* ModuleLoader::loadSharedModule(SkSL::Compiler* compiler) { + if (!fModuleLoader.fSharedModule) { + const Module* rootModule = this->rootModule(); + fModuleLoader.fSharedModule = compile_and_shrink(compiler, + ProgramKind::kFragment, + MODULE_DATA(sksl_shared), + rootModule, + this->coreModifiers()); + } + return fModuleLoader.fSharedModule.get(); +} + +const Module* ModuleLoader::loadGPUModule(SkSL::Compiler* compiler) { + if (!fModuleLoader.fGPUModule) { + const Module* sharedModule = this->loadSharedModule(compiler); + fModuleLoader.fGPUModule = compile_and_shrink(compiler, + ProgramKind::kFragment, + MODULE_DATA(sksl_gpu), + sharedModule, + this->coreModifiers()); + } + return fModuleLoader.fGPUModule.get(); +} + +const Module* ModuleLoader::loadFragmentModule(SkSL::Compiler* compiler) { + if (!fModuleLoader.fFragmentModule) { + const Module* gpuModule = this->loadGPUModule(compiler); + fModuleLoader.fFragmentModule = compile_and_shrink(compiler, + ProgramKind::kFragment, + MODULE_DATA(sksl_frag), + gpuModule, + this->coreModifiers()); + } + return fModuleLoader.fFragmentModule.get(); +} + +const Module* ModuleLoader::loadVertexModule(SkSL::Compiler* compiler) { + if (!fModuleLoader.fVertexModule) { + const Module* gpuModule = this->loadGPUModule(compiler); + fModuleLoader.fVertexModule = compile_and_shrink(compiler, + ProgramKind::kVertex, + MODULE_DATA(sksl_vert), + gpuModule, + this->coreModifiers()); + } + return fModuleLoader.fVertexModule.get(); +} + +const Module* ModuleLoader::loadComputeModule(SkSL::Compiler* compiler) { + if (!fModuleLoader.fComputeModule) { + const Module* gpuModule = this->loadGPUModule(compiler); + fModuleLoader.fComputeModule = compile_and_shrink(compiler, + ProgramKind::kCompute, + MODULE_DATA(sksl_compute), + gpuModule, + this->coreModifiers()); + add_compute_type_aliases(fModuleLoader.fComputeModule->fSymbols.get(), + this->builtinTypes()); + } + return fModuleLoader.fComputeModule.get(); +} + +const Module* ModuleLoader::loadGraphiteFragmentModule(SkSL::Compiler* compiler) { +#if defined(SK_GRAPHITE) + if (!fModuleLoader.fGraphiteFragmentModule) { + const Module* fragmentModule = this->loadFragmentModule(compiler); + fModuleLoader.fGraphiteFragmentModule = compile_and_shrink(compiler, + ProgramKind::kGraphiteFragment, + MODULE_DATA(sksl_graphite_frag), + fragmentModule, + this->coreModifiers()); + } + return fModuleLoader.fGraphiteFragmentModule.get(); +#else + return this->loadFragmentModule(compiler); +#endif +} + +const Module* ModuleLoader::loadGraphiteVertexModule(SkSL::Compiler* compiler) { +#if defined(SK_GRAPHITE) + if (!fModuleLoader.fGraphiteVertexModule) { + const Module* vertexModule = this->loadVertexModule(compiler); + fModuleLoader.fGraphiteVertexModule = compile_and_shrink(compiler, + ProgramKind::kGraphiteVertex, + MODULE_DATA(sksl_graphite_vert), + vertexModule, + this->coreModifiers()); + } + return fModuleLoader.fGraphiteVertexModule.get(); +#else + return this->loadVertexModule(compiler); +#endif +} + +void ModuleLoader::Impl::makeRootSymbolTable() { + auto rootModule = std::make_unique(); + rootModule->fSymbols = std::make_shared(/*builtin=*/true); + + for (BuiltinTypePtr rootType : kRootTypes) { + rootModule->fSymbols->addWithoutOwnership((fBuiltinTypes.*rootType).get()); + } + + for (BuiltinTypePtr privateType : kPrivateTypes) { + rootModule->fSymbols->addWithoutOwnership((fBuiltinTypes.*privateType).get()); + } + + // sk_Caps is "builtin", but all references to it are resolved to Settings, so we don't need to + // treat it as builtin (ie, no need to clone it into the Program). + rootModule->fSymbols->add(std::make_unique(/*pos=*/Position(), + /*modifiersPosition=*/Position(), + fCoreModifiers.add(Modifiers{}), + "sk_Caps", + fBuiltinTypes.fSkCaps.get(), + /*builtin=*/false, + Variable::Storage::kGlobal)); + fRootModule = std::move(rootModule); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLModuleLoader.h b/gfx/skia/skia/src/sksl/SkSLModuleLoader.h new file mode 100644 index 0000000000..bb300e2f7a --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLModuleLoader.h @@ -0,0 +1,67 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_MODULELOADER +#define SKSL_MODULELOADER + +#include "src/sksl/SkSLBuiltinTypes.h" +#include + +namespace SkSL { + +class Compiler; +class ModifiersPool; +struct Module; +class Type; + +using BuiltinTypePtr = const std::unique_ptr BuiltinTypes::*; + +class ModuleLoader { +private: + struct Impl; + Impl& fModuleLoader; + +public: + ModuleLoader(ModuleLoader::Impl&); + ~ModuleLoader(); + + // Acquires a mutex-locked reference to the singleton ModuleLoader. When the ModuleLoader is + // allowed to fall out of scope, the mutex will be released. + static ModuleLoader Get(); + + // The built-in types and root module are universal, immutable, and shared by every Compiler. + // They are created when the ModuleLoader is instantiated and never change. + const BuiltinTypes& builtinTypes(); + const Module* rootModule(); + + // This ModifiersPool is shared by every built-in module. + ModifiersPool& coreModifiers(); + + // These modules are loaded on demand; once loaded, they are kept for the lifetime of the + // process. + const Module* loadSharedModule(SkSL::Compiler* compiler); + const Module* loadGPUModule(SkSL::Compiler* compiler); + const Module* loadVertexModule(SkSL::Compiler* compiler); + const Module* loadFragmentModule(SkSL::Compiler* compiler); + const Module* loadComputeModule(SkSL::Compiler* compiler); + const Module* loadGraphiteVertexModule(SkSL::Compiler* compiler); + const Module* loadGraphiteFragmentModule(SkSL::Compiler* compiler); + + const Module* loadPublicModule(SkSL::Compiler* compiler); + const Module* loadPrivateRTShaderModule(SkSL::Compiler* compiler); + + // This updates an existing Module's symbol table to match Runtime Effect rules. GLSL types like + // `vec4` are added; SkSL private types like `sampler2D` are replaced with an invalid type. + void addPublicTypeAliases(const SkSL::Module* module); + + // This unloads every module. It's useful primarily for benchmarking purposes. + void unloadModules(); +}; + +} // namespace SkSL + +#endif // SKSL_MODULELOADER diff --git a/gfx/skia/skia/src/sksl/SkSLOperator.cpp b/gfx/skia/skia/src/sksl/SkSLOperator.cpp new file mode 100644 index 0000000000..6c9ddc92b4 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLOperator.cpp @@ -0,0 +1,384 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/sksl/SkSLOperator.h" + +#include "include/core/SkTypes.h" +#include "src/base/SkStringView.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/ir/SkSLType.h" + +#include + +namespace SkSL { + +OperatorPrecedence Operator::getBinaryPrecedence() const { + switch (this->kind()) { + case Kind::STAR: // fall through + case Kind::SLASH: // fall through + case Kind::PERCENT: return OperatorPrecedence::kMultiplicative; + case Kind::PLUS: // fall through + case Kind::MINUS: return OperatorPrecedence::kAdditive; + case Kind::SHL: // fall through + case Kind::SHR: return OperatorPrecedence::kShift; + case Kind::LT: // fall through + case Kind::GT: // fall through + case Kind::LTEQ: // fall through + case Kind::GTEQ: return OperatorPrecedence::kRelational; + case Kind::EQEQ: // fall through + case Kind::NEQ: return OperatorPrecedence::kEquality; + case Kind::BITWISEAND: return OperatorPrecedence::kBitwiseAnd; + case Kind::BITWISEXOR: return OperatorPrecedence::kBitwiseXor; + case Kind::BITWISEOR: return OperatorPrecedence::kBitwiseOr; + case Kind::LOGICALAND: return OperatorPrecedence::kLogicalAnd; + case Kind::LOGICALXOR: return OperatorPrecedence::kLogicalXor; + case Kind::LOGICALOR: return OperatorPrecedence::kLogicalOr; + case Kind::EQ: // fall through + case Kind::PLUSEQ: // fall through + case Kind::MINUSEQ: // fall through + case Kind::STAREQ: // fall through + case Kind::SLASHEQ: // fall through + case Kind::PERCENTEQ: // fall through + case Kind::SHLEQ: // fall through + case Kind::SHREQ: // fall through + case Kind::BITWISEANDEQ: // fall through + case Kind::BITWISEXOREQ: // fall through + case Kind::BITWISEOREQ: return OperatorPrecedence::kAssignment; + case Kind::COMMA: return OperatorPrecedence::kSequence; + default: SK_ABORT("unsupported binary operator"); + } +} + +const char* Operator::operatorName() const { + switch (this->kind()) { + case Kind::PLUS: return " + "; + case Kind::MINUS: return " - "; + case Kind::STAR: return " * "; + case Kind::SLASH: return " / "; + case Kind::PERCENT: return " % "; + case Kind::SHL: return " << "; + case Kind::SHR: return " >> "; + case Kind::LOGICALNOT: return "!"; + case Kind::LOGICALAND: return " && "; + case Kind::LOGICALOR: return " || "; + case Kind::LOGICALXOR: return " ^^ "; + case Kind::BITWISENOT: return "~"; + case Kind::BITWISEAND: return " & "; + case Kind::BITWISEOR: return " | "; + case Kind::BITWISEXOR: return " ^ "; + case Kind::EQ: return " = "; + case Kind::EQEQ: return " == "; + case Kind::NEQ: return " != "; + case Kind::LT: return " < "; + case Kind::GT: return " > "; + case Kind::LTEQ: return " <= "; + case Kind::GTEQ: return " >= "; + case Kind::PLUSEQ: return " += "; + case Kind::MINUSEQ: return " -= "; + case Kind::STAREQ: return " *= "; + case Kind::SLASHEQ: return " /= "; + case Kind::PERCENTEQ: return " %= "; + case Kind::SHLEQ: return " <<= "; + case Kind::SHREQ: return " >>= "; + case Kind::BITWISEANDEQ: return " &= "; + case Kind::BITWISEOREQ: return " |= "; + case Kind::BITWISEXOREQ: return " ^= "; + case Kind::PLUSPLUS: return "++"; + case Kind::MINUSMINUS: return "--"; + case Kind::COMMA: return ", "; + default: SkUNREACHABLE; + } +} + +std::string_view Operator::tightOperatorName() const { + std::string_view name = this->operatorName(); + if (skstd::starts_with(name, ' ')) { + name.remove_prefix(1); + } + if (skstd::ends_with(name, ' ')) { + name.remove_suffix(1); + } + return name; +} + +bool Operator::isAssignment() const { + switch (this->kind()) { + case Kind::EQ: // fall through + case Kind::PLUSEQ: // fall through + case Kind::MINUSEQ: // fall through + case Kind::STAREQ: // fall through + case Kind::SLASHEQ: // fall through + case Kind::PERCENTEQ: // fall through + case Kind::SHLEQ: // fall through + case Kind::SHREQ: // fall through + case Kind::BITWISEOREQ: // fall through + case Kind::BITWISEXOREQ: // fall through + case Kind::BITWISEANDEQ: + return true; + default: + return false; + } +} + +Operator Operator::removeAssignment() const { + switch (this->kind()) { + case Kind::PLUSEQ: return Kind::PLUS; + case Kind::MINUSEQ: return Kind::MINUS; + case Kind::STAREQ: return Kind::STAR; + case Kind::SLASHEQ: return Kind::SLASH; + case Kind::PERCENTEQ: return Kind::PERCENT; + case Kind::SHLEQ: return Kind::SHL; + case Kind::SHREQ: return Kind::SHR; + case Kind::BITWISEOREQ: return Kind::BITWISEOR; + case Kind::BITWISEXOREQ: return Kind::BITWISEXOR; + case Kind::BITWISEANDEQ: return Kind::BITWISEAND; + default: return *this; + } +} + +bool Operator::isRelational() const { + switch (this->kind()) { + case Kind::LT: + case Kind::GT: + case Kind::LTEQ: + case Kind::GTEQ: + return true; + default: + return false; + } +} + +bool Operator::isOnlyValidForIntegralTypes() const { + switch (this->kind()) { + case Kind::SHL: + case Kind::SHR: + case Kind::BITWISEAND: + case Kind::BITWISEOR: + case Kind::BITWISEXOR: + case Kind::PERCENT: + case Kind::SHLEQ: + case Kind::SHREQ: + case Kind::BITWISEANDEQ: + case Kind::BITWISEOREQ: + case Kind::BITWISEXOREQ: + case Kind::PERCENTEQ: + return true; + default: + return false; + } +} + +bool Operator::isValidForMatrixOrVector() const { + switch (this->kind()) { + case Kind::PLUS: + case Kind::MINUS: + case Kind::STAR: + case Kind::SLASH: + case Kind::PERCENT: + case Kind::SHL: + case Kind::SHR: + case Kind::BITWISEAND: + case Kind::BITWISEOR: + case Kind::BITWISEXOR: + case Kind::PLUSEQ: + case Kind::MINUSEQ: + case Kind::STAREQ: + case Kind::SLASHEQ: + case Kind::PERCENTEQ: + case Kind::SHLEQ: + case Kind::SHREQ: + case Kind::BITWISEANDEQ: + case Kind::BITWISEOREQ: + case Kind::BITWISEXOREQ: + return true; + default: + return false; + } +} + +bool Operator::isMatrixMultiply(const Type& left, const Type& right) const { + if (this->kind() != Kind::STAR && this->kind() != Kind::STAREQ) { + return false; + } + if (left.isMatrix()) { + return right.isMatrix() || right.isVector(); + } + return left.isVector() && right.isMatrix(); +} + +/** + * Determines the operand and result types of a binary expression. Returns true if the expression is + * legal, false otherwise. If false, the values of the out parameters are undefined. + */ +bool Operator::determineBinaryType(const Context& context, + const Type& left, + const Type& right, + const Type** outLeftType, + const Type** outRightType, + const Type** outResultType) const { + const bool allowNarrowing = context.fConfig->fSettings.fAllowNarrowingConversions; + switch (this->kind()) { + case Kind::EQ: // left = right + if (left.isVoid()) { + return false; + } + *outLeftType = &left; + *outRightType = &left; + *outResultType = &left; + return right.canCoerceTo(left, allowNarrowing); + + case Kind::EQEQ: // left == right + case Kind::NEQ: { // left != right + if (left.isVoid() || left.isOpaque()) { + return false; + } + CoercionCost rightToLeft = right.coercionCost(left), + leftToRight = left.coercionCost(right); + if (rightToLeft < leftToRight) { + if (rightToLeft.isPossible(allowNarrowing)) { + *outLeftType = &left; + *outRightType = &left; + *outResultType = context.fTypes.fBool.get(); + return true; + } + } else { + if (leftToRight.isPossible(allowNarrowing)) { + *outLeftType = &right; + *outRightType = &right; + *outResultType = context.fTypes.fBool.get(); + return true; + } + } + return false; + } + case Kind::LOGICALOR: // left || right + case Kind::LOGICALAND: // left && right + case Kind::LOGICALXOR: // left ^^ right + *outLeftType = context.fTypes.fBool.get(); + *outRightType = context.fTypes.fBool.get(); + *outResultType = context.fTypes.fBool.get(); + return left.canCoerceTo(*context.fTypes.fBool, allowNarrowing) && + right.canCoerceTo(*context.fTypes.fBool, allowNarrowing); + + case Operator::Kind::COMMA: // left, right + if (left.isOpaque() || right.isOpaque()) { + return false; + } + *outLeftType = &left; + *outRightType = &right; + *outResultType = &right; + return true; + + default: + break; + } + + // Boolean types only support the operators listed above (, = == != || && ^^). + // If we've gotten this far with a boolean, we have an unsupported operator. + const Type& leftComponentType = left.componentType(); + const Type& rightComponentType = right.componentType(); + if (leftComponentType.isBoolean() || rightComponentType.isBoolean()) { + return false; + } + + bool isAssignment = this->isAssignment(); + if (this->isMatrixMultiply(left, right)) { // left * right + // Determine final component type. + if (!this->determineBinaryType(context, left.componentType(), right.componentType(), + outLeftType, outRightType, outResultType)) { + return false; + } + // Convert component type to compound. + *outLeftType = &(*outResultType)->toCompound(context, left.columns(), left.rows()); + *outRightType = &(*outResultType)->toCompound(context, right.columns(), right.rows()); + int leftColumns = left.columns(), leftRows = left.rows(); + int rightColumns = right.columns(), rightRows = right.rows(); + if (right.isVector()) { + // `matrix * vector` treats the vector as a column vector; we need to transpose it. + std::swap(rightColumns, rightRows); + SkASSERT(rightColumns == 1); + } + if (rightColumns > 1) { + *outResultType = &(*outResultType)->toCompound(context, rightColumns, leftRows); + } else { + // The result was a column vector. Transpose it back to a row. + *outResultType = &(*outResultType)->toCompound(context, leftRows, rightColumns); + } + if (isAssignment && ((*outResultType)->columns() != leftColumns || + (*outResultType)->rows() != leftRows)) { + return false; + } + return leftColumns == rightRows; + } + + bool leftIsVectorOrMatrix = left.isVector() || left.isMatrix(); + bool validMatrixOrVectorOp = this->isValidForMatrixOrVector(); + + if (leftIsVectorOrMatrix && validMatrixOrVectorOp && right.isScalar()) { + // Determine final component type. + if (!this->determineBinaryType(context, left.componentType(), right, + outLeftType, outRightType, outResultType)) { + return false; + } + // Convert component type to compound. + *outLeftType = &(*outLeftType)->toCompound(context, left.columns(), left.rows()); + if (!this->isRelational()) { + *outResultType = &(*outResultType)->toCompound(context, left.columns(), left.rows()); + } + return true; + } + + bool rightIsVectorOrMatrix = right.isVector() || right.isMatrix(); + + if (!isAssignment && rightIsVectorOrMatrix && validMatrixOrVectorOp && left.isScalar()) { + // Determine final component type. + if (!this->determineBinaryType(context, left, right.componentType(), + outLeftType, outRightType, outResultType)) { + return false; + } + // Convert component type to compound. + *outRightType = &(*outRightType)->toCompound(context, right.columns(), right.rows()); + if (!this->isRelational()) { + *outResultType = &(*outResultType)->toCompound(context, right.columns(), right.rows()); + } + return true; + } + + CoercionCost rightToLeftCost = right.coercionCost(left); + CoercionCost leftToRightCost = isAssignment ? CoercionCost::Impossible() + : left.coercionCost(right); + + if ((left.isScalar() && right.isScalar()) || (leftIsVectorOrMatrix && validMatrixOrVectorOp)) { + if (this->isOnlyValidForIntegralTypes()) { + if (!leftComponentType.isInteger() || !rightComponentType.isInteger()) { + return false; + } + } + if (rightToLeftCost.isPossible(allowNarrowing) && rightToLeftCost < leftToRightCost) { + // Right-to-Left conversion is possible and cheaper + *outLeftType = &left; + *outRightType = &left; + *outResultType = &left; + } else if (leftToRightCost.isPossible(allowNarrowing)) { + // Left-to-Right conversion is possible (and at least as cheap as Right-to-Left) + *outLeftType = &right; + *outRightType = &right; + *outResultType = &right; + } else { + return false; + } + if (this->isRelational()) { + *outResultType = context.fTypes.fBool.get(); + } + return true; + } + return false; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLOutputStream.cpp b/gfx/skia/skia/src/sksl/SkSLOutputStream.cpp new file mode 100644 index 0000000000..7972c9fd19 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLOutputStream.cpp @@ -0,0 +1,41 @@ +/* + * Copyright 2019 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLOutputStream.h" + +#include +#include + +namespace SkSL { + +void OutputStream::writeString(const std::string& s) { + this->write(s.c_str(), s.size()); +} + +void OutputStream::printf(const char format[], ...) { + va_list args; + va_start(args, format); + this->appendVAList(format, args); + va_end(args); +} + +void OutputStream::appendVAList(const char format[], va_list args) { + char buffer[kBufferSize]; + va_list copy; + va_copy(copy, args); + int length = vsnprintf(buffer, kBufferSize, format, args); + if (length > (int) kBufferSize) { + std::unique_ptr bigBuffer(new char[length + 1]); + vsnprintf(bigBuffer.get(), length + 1, format, copy); + this->write(bigBuffer.get(), length); + } else { + this->write(buffer, length); + } + va_end(copy); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLOutputStream.h b/gfx/skia/skia/src/sksl/SkSLOutputStream.h new file mode 100644 index 0000000000..542ffd6f90 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLOutputStream.h @@ -0,0 +1,58 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_OUTPUTSTREAM +#define SKSL_OUTPUTSTREAM + +#include "include/core/SkTypes.h" + +#include +#include +#include +#include + +namespace SkSL { + +class OutputStream { +public: + virtual bool isValid() const { + return true; + } + + virtual void write8(uint8_t b) = 0; + + void write16(uint16_t i) { + this->write8((uint8_t) i); + this->write8((uint8_t) (i >> 8)); + } + + void write32(uint32_t i) { + this->write8((uint8_t) i); + this->write8((uint8_t) (i >> 8)); + this->write8((uint8_t) (i >> 16)); + this->write8((uint8_t) (i >> 24)); + } + + virtual void writeText(const char* s) = 0; + + virtual void write(const void* s, size_t size) = 0; + + void writeString(const std::string& s); + + void printf(const char format[], ...) SK_PRINTF_LIKE(2, 3); + + void appendVAList(const char format[], va_list args) SK_PRINTF_LIKE(2, 0); + + virtual ~OutputStream() {} + +private: + static const int kBufferSize = 1024; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLParser.cpp b/gfx/skia/skia/src/sksl/SkSLParser.cpp new file mode 100644 index 0000000000..d63f930a63 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLParser.cpp @@ -0,0 +1,2248 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLParser.h" + +#include "include/core/SkSpan.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLString.h" +#include "include/sksl/DSLBlock.h" +#include "include/sksl/DSLCase.h" +#include "include/sksl/DSLFunction.h" +#include "include/sksl/DSLVar.h" +#include "include/sksl/SkSLOperator.h" +#include "include/sksl/SkSLVersion.h" +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLConstantFolder.h" +#include "src/sksl/SkSLThreadContext.h" +#include "src/sksl/dsl/priv/DSLWriter.h" +#include "src/sksl/dsl/priv/DSL_priv.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLSymbolTable.h" +#include "src/sksl/ir/SkSLVariable.h" + +#include +#include +#include +#include +#include +#include + +using namespace SkSL::dsl; + +namespace SkSL { + +static constexpr int kMaxParseDepth = 50; + +static int parse_modifier_token(Token::Kind token) { + switch (token) { + case Token::Kind::TK_UNIFORM: return Modifiers::kUniform_Flag; + case Token::Kind::TK_CONST: return Modifiers::kConst_Flag; + case Token::Kind::TK_IN: return Modifiers::kIn_Flag; + case Token::Kind::TK_OUT: return Modifiers::kOut_Flag; + case Token::Kind::TK_INOUT: return Modifiers::kIn_Flag | Modifiers::kOut_Flag; + case Token::Kind::TK_FLAT: return Modifiers::kFlat_Flag; + case Token::Kind::TK_NOPERSPECTIVE: return Modifiers::kNoPerspective_Flag; + case Token::Kind::TK_PURE: return Modifiers::kPure_Flag; + case Token::Kind::TK_INLINE: return Modifiers::kInline_Flag; + case Token::Kind::TK_NOINLINE: return Modifiers::kNoInline_Flag; + case Token::Kind::TK_HIGHP: return Modifiers::kHighp_Flag; + case Token::Kind::TK_MEDIUMP: return Modifiers::kMediump_Flag; + case Token::Kind::TK_LOWP: return Modifiers::kLowp_Flag; + case Token::Kind::TK_EXPORT: return Modifiers::kExport_Flag; + case Token::Kind::TK_ES3: return Modifiers::kES3_Flag; + case Token::Kind::TK_WORKGROUP: return Modifiers::kWorkgroup_Flag; + case Token::Kind::TK_READONLY: return Modifiers::kReadOnly_Flag; + case Token::Kind::TK_WRITEONLY: return Modifiers::kWriteOnly_Flag; + case Token::Kind::TK_BUFFER: return Modifiers::kBuffer_Flag; + default: return 0; + } +} + +class Parser::AutoDepth { +public: + AutoDepth(Parser* p) + : fParser(p) + , fDepth(0) {} + + ~AutoDepth() { + fParser->fDepth -= fDepth; + } + + bool increase() { + ++fDepth; + ++fParser->fDepth; + if (fParser->fDepth > kMaxParseDepth) { + fParser->error(fParser->peek(), "exceeded max parse depth"); + fParser->fEncounteredFatalError = true; + return false; + } + return true; + } + +private: + Parser* fParser; + int fDepth; +}; + +class Parser::AutoSymbolTable { +public: + AutoSymbolTable(Parser* p) : fParser(p) { + SymbolTable::Push(&fParser->symbolTable()); + } + + ~AutoSymbolTable() { + SymbolTable::Pop(&fParser->symbolTable()); + } + +private: + Parser* fParser; +}; + +Parser::Parser(Compiler* compiler, + const ProgramSettings& settings, + ProgramKind kind, + std::string text) + : fCompiler(*compiler) + , fSettings(settings) + , fKind(kind) + , fText(std::make_unique(std::move(text))) + , fPushback(Token::Kind::TK_NONE, /*offset=*/-1, /*length=*/-1) { + fLexer.start(*fText); +} + +std::shared_ptr& Parser::symbolTable() { + return fCompiler.symbolTable(); +} + +void Parser::addToSymbolTable(DSLVarBase& var, Position pos) { + if (SkSL::Variable* skslVar = DSLWriter::Var(var)) { + this->symbolTable()->addWithoutOwnership(skslVar); + } +} + +Token Parser::nextRawToken() { + Token token; + if (fPushback.fKind != Token::Kind::TK_NONE) { + // Retrieve the token from the pushback buffer. + token = fPushback; + fPushback.fKind = Token::Kind::TK_NONE; + } else { + // Fetch a token from the lexer. + token = fLexer.next(); + + // Some tokens are always invalid, so we detect and report them here. + switch (token.fKind) { + case Token::Kind::TK_PRIVATE_IDENTIFIER: + if (ProgramConfig::AllowsPrivateIdentifiers(fKind)) { + token.fKind = Token::Kind::TK_IDENTIFIER; + break; + } + [[fallthrough]]; + + case Token::Kind::TK_RESERVED: + this->error(token, "name '" + std::string(this->text(token)) + "' is reserved"); + token.fKind = Token::Kind::TK_IDENTIFIER; // reduces additional follow-up errors + break; + + case Token::Kind::TK_BAD_OCTAL: + this->error(token, "'" + std::string(this->text(token)) + + "' is not a valid octal number"); + break; + + default: + break; + } + } + + return token; +} + +static bool is_whitespace(Token::Kind kind) { + switch (kind) { + case Token::Kind::TK_WHITESPACE: + case Token::Kind::TK_LINE_COMMENT: + case Token::Kind::TK_BLOCK_COMMENT: + return true; + + default: + return false; + } +} + +bool Parser::expectNewline() { + Token token = this->nextRawToken(); + if (token.fKind == Token::Kind::TK_WHITESPACE) { + // The lexer doesn't distinguish newlines from other forms of whitespace, so we check + // for newlines by searching through the token text. + std::string_view tokenText = this->text(token); + if (tokenText.find_first_of('\r') != std::string_view::npos || + tokenText.find_first_of('\n') != std::string_view::npos) { + return true; + } + } + // We didn't find a newline. + this->pushback(token); + return false; +} + +Token Parser::nextToken() { + for (;;) { + Token token = this->nextRawToken(); + if (!is_whitespace(token.fKind)) { + return token; + } + } +} + +void Parser::pushback(Token t) { + SkASSERT(fPushback.fKind == Token::Kind::TK_NONE); + fPushback = std::move(t); +} + +Token Parser::peek() { + if (fPushback.fKind == Token::Kind::TK_NONE) { + fPushback = this->nextToken(); + } + return fPushback; +} + +bool Parser::checkNext(Token::Kind kind, Token* result) { + if (fPushback.fKind != Token::Kind::TK_NONE && fPushback.fKind != kind) { + return false; + } + Token next = this->nextToken(); + if (next.fKind == kind) { + if (result) { + *result = next; + } + return true; + } + this->pushback(std::move(next)); + return false; +} + +bool Parser::expect(Token::Kind kind, const char* expected, Token* result) { + Token next = this->nextToken(); + if (next.fKind == kind) { + if (result) { + *result = std::move(next); + } + return true; + } else { + this->error(next, "expected " + std::string(expected) + ", but found '" + + std::string(this->text(next)) + "'"); + this->fEncounteredFatalError = true; + return false; + } +} + +bool Parser::expectIdentifier(Token* result) { + if (!this->expect(Token::Kind::TK_IDENTIFIER, "an identifier", result)) { + return false; + } + if (this->symbolTable()->isBuiltinType(this->text(*result))) { + this->error(*result, "expected an identifier, but found type '" + + std::string(this->text(*result)) + "'"); + this->fEncounteredFatalError = true; + return false; + } + return true; +} + +bool Parser::checkIdentifier(Token* result) { + if (!this->checkNext(Token::Kind::TK_IDENTIFIER, result)) { + return false; + } + if (this->symbolTable()->isBuiltinType(this->text(*result))) { + this->pushback(std::move(*result)); + return false; + } + return true; +} + +std::string_view Parser::text(Token token) { + return std::string_view(fText->data() + token.fOffset, token.fLength); +} + +Position Parser::position(Token t) { + if (t.fOffset >= 0) { + return Position::Range(t.fOffset, t.fOffset + t.fLength); + } else { + return Position(); + } +} + +void Parser::error(Token token, std::string_view msg) { + this->error(this->position(token), msg); +} + +void Parser::error(Position position, std::string_view msg) { + GetErrorReporter().error(position, msg); +} + +Position Parser::rangeFrom(Position start) { + int offset = fPushback.fKind != Token::Kind::TK_NONE ? fPushback.fOffset + : fLexer.getCheckpoint().fOffset; + return Position::Range(start.startOffset(), offset); +} + +Position Parser::rangeFrom(Token start) { + return this->rangeFrom(this->position(start)); +} + +/* declaration* END_OF_FILE */ +std::unique_ptr Parser::program() { + ErrorReporter* errorReporter = &fCompiler.errorReporter(); + Start(&fCompiler, fKind, fSettings); + SetErrorReporter(errorReporter); + errorReporter->setSource(*fText); + this->declarations(); + std::unique_ptr result; + if (!GetErrorReporter().errorCount()) { + result = dsl::ReleaseProgram(std::move(fText)); + } + errorReporter->setSource(std::string_view()); + End(); + return result; +} + +std::unique_ptr Parser::moduleInheritingFrom(const SkSL::Module* parent) { + ErrorReporter* errorReporter = &fCompiler.errorReporter(); + StartModule(&fCompiler, fKind, fSettings, parent); + SetErrorReporter(errorReporter); + errorReporter->setSource(*fText); + this->declarations(); + this->symbolTable()->takeOwnershipOfString(std::move(*fText)); + auto result = std::make_unique(); + result->fParent = parent; + result->fSymbols = this->symbolTable(); + result->fElements = std::move(ThreadContext::ProgramElements()); + errorReporter->setSource(std::string_view()); + End(); + return result; +} + +void Parser::declarations() { + fEncounteredFatalError = false; + // Any #version directive must appear as the first thing in a file + if (this->peek().fKind == Token::Kind::TK_DIRECTIVE) { + this->directive(/*allowVersion=*/true); + } + bool done = false; + while (!done) { + switch (this->peek().fKind) { + case Token::Kind::TK_END_OF_FILE: + done = true; + break; + case Token::Kind::TK_DIRECTIVE: + this->directive(/*allowVersion=*/false); + break; + case Token::Kind::TK_INVALID: + this->error(this->peek(), "invalid token"); + this->nextToken(); + done = true; + break; + default: + this->declaration(); + done = fEncounteredFatalError; + break; + } + } +} + +/* DIRECTIVE(#extension) IDENTIFIER COLON IDENTIFIER NEWLINE | + DIRECTIVE(#version) INTLITERAL NEWLINE */ +void Parser::directive(bool allowVersion) { + Token start; + if (!this->expect(Token::Kind::TK_DIRECTIVE, "a directive", &start)) { + return; + } + std::string_view text = this->text(start); + const bool allowExtensions = !ProgramConfig::IsRuntimeEffect(fKind); + if (text == "#extension" && allowExtensions) { + Token name; + if (!this->expectIdentifier(&name)) { + return; + } + if (!this->expect(Token::Kind::TK_COLON, "':'")) { + return; + } + Token behavior; + if (!this->expect(Token::Kind::TK_IDENTIFIER, "an identifier", &behavior)) { + return; + } + std::string_view behaviorText = this->text(behavior); + if (behaviorText != "disable") { + if (behaviorText == "require" || behaviorText == "enable" || behaviorText == "warn") { + // We don't currently do anything different between require, enable, and warn + dsl::AddExtension(this->text(name)); + } else { + this->error(behavior, "expected 'require', 'enable', 'warn', or 'disable'"); + } + } + + // We expect a newline after an #extension directive. + if (!this->expectNewline()) { + this->error(start, "invalid #extension directive"); + } + } else if (text == "#version") { + if (!allowVersion) { + this->error(start, "#version directive must appear before anything else"); + return; + } + SKSL_INT version; + if (!this->intLiteral(&version)) { + return; + } + switch (version) { + case 100: + ThreadContext::GetProgramConfig()->fRequiredSkSLVersion = Version::k100; + break; + case 300: + ThreadContext::GetProgramConfig()->fRequiredSkSLVersion = Version::k300; + break; + default: + this->error(start, "unsupported version number"); + return; + } + // We expect a newline after a #version directive. + if (!this->expectNewline()) { + this->error(start, "invalid #version directive"); + } + } else { + this->error(start, "unsupported directive '" + std::string(this->text(start)) + "'"); + } +} + +/* modifiers (structVarDeclaration | type IDENTIFIER ((LPAREN parameter (COMMA parameter)* RPAREN + (block | SEMICOLON)) | SEMICOLON) | interfaceBlock) */ +bool Parser::declaration() { + Token start = this->peek(); + if (start.fKind == Token::Kind::TK_SEMICOLON) { + this->nextToken(); + this->error(start, "expected a declaration, but found ';'"); + return false; + } + DSLModifiers modifiers = this->modifiers(); + Token lookahead = this->peek(); + if (lookahead.fKind == Token::Kind::TK_IDENTIFIER && + !this->symbolTable()->isType(this->text(lookahead))) { + // we have an identifier that's not a type, could be the start of an interface block + return this->interfaceBlock(modifiers); + } + if (lookahead.fKind == Token::Kind::TK_SEMICOLON) { + this->nextToken(); + Declare(modifiers, this->position(start)); + return true; + } + if (lookahead.fKind == Token::Kind::TK_STRUCT) { + this->structVarDeclaration(this->position(start), modifiers); + return true; + } + DSLType type = this->type(&modifiers); + if (!type.hasValue()) { + return false; + } + Token name; + if (!this->expectIdentifier(&name)) { + return false; + } + if (this->checkNext(Token::Kind::TK_LPAREN)) { + return this->functionDeclarationEnd(this->position(start), modifiers, type, name); + } else { + this->globalVarDeclarationEnd(this->position(start), modifiers, type, name); + return true; + } +} + +/* (RPAREN | VOID RPAREN | parameter (COMMA parameter)* RPAREN) (block | SEMICOLON) */ +bool Parser::functionDeclarationEnd(Position start, + DSLModifiers& modifiers, + DSLType type, + const Token& name) { + SkSTArray<8, DSLParameter> parameters; + Token lookahead = this->peek(); + if (lookahead.fKind == Token::Kind::TK_RPAREN) { + // `()` means no parameters at all. + } else if (lookahead.fKind == Token::Kind::TK_IDENTIFIER && this->text(lookahead) == "void") { + // `(void)` also means no parameters at all. + this->nextToken(); + } else { + for (;;) { + size_t paramIndex = parameters.size(); + std::optional parameter = this->parameter(paramIndex); + if (!parameter) { + return false; + } + parameters.push_back(std::move(*parameter)); + if (!this->checkNext(Token::Kind::TK_COMMA)) { + break; + } + } + } + if (!this->expect(Token::Kind::TK_RPAREN, "')'")) { + return false; + } + SkSTArray<8, DSLParameter*> parameterPointers; + parameterPointers.reserve_back(parameters.size()); + for (DSLParameter& param : parameters) { + parameterPointers.push_back(¶m); + } + + DSLFunction result(this->text(name), modifiers, type, parameterPointers, + this->rangeFrom(start)); + + const bool hasFunctionBody = !this->checkNext(Token::Kind::TK_SEMICOLON); + if (hasFunctionBody) { + AutoSymbolTable symbols(this); + for (DSLParameter* var : parameterPointers) { + if (!var->name().empty()) { + this->addToSymbolTable(*var); + } + } + Token bodyStart = this->peek(); + std::optional body = this->block(); + if (!body) { + return false; + } + result.define(std::move(*body), this->rangeFrom(bodyStart)); + } else { + result.prototype(); + } + return true; +} + +bool Parser::arraySize(SKSL_INT* outResult) { + // Start out with a safe value that won't generate any errors downstream + *outResult = 1; + Token next = this->peek(); + if (next.fKind == Token::Kind::TK_RBRACKET) { + this->error(this->position(next), "unsized arrays are not permitted here"); + return true; + } + DSLExpression sizeExpr = this->expression(); + if (!sizeExpr.hasValue()) { + return false; + } + if (sizeExpr.isValid()) { + std::unique_ptr sizeLiteral = sizeExpr.release(); + SKSL_INT size; + if (!ConstantFolder::GetConstantInt(*sizeLiteral, &size)) { + this->error(sizeLiteral->fPosition, "array size must be an integer"); + return true; + } + if (size > INT32_MAX) { + this->error(sizeLiteral->fPosition, "array size out of bounds"); + return true; + } + if (size <= 0) { + this->error(sizeLiteral->fPosition, "array size must be positive"); + return true; + } + // Now that we've validated it, output the real value + *outResult = size; + } + return true; +} + +bool Parser::parseArrayDimensions(Position pos, DSLType* type) { + Token next; + while (this->checkNext(Token::Kind::TK_LBRACKET, &next)) { + if (this->checkNext(Token::Kind::TK_RBRACKET)) { + if (this->allowUnsizedArrays()) { + *type = UnsizedArray(*type, this->rangeFrom(pos)); + } else { + this->error(this->rangeFrom(pos), "unsized arrays are not permitted here"); + } + } else { + SKSL_INT size; + if (!this->arraySize(&size)) { + return false; + } + if (!this->expect(Token::Kind::TK_RBRACKET, "']'")) { + return false; + } + *type = Array(*type, size, this->rangeFrom(pos)); + } + } + return true; +} + +bool Parser::parseInitializer(Position pos, DSLExpression* initializer) { + if (this->checkNext(Token::Kind::TK_EQ)) { + DSLExpression value = this->assignmentExpression(); + if (!value.hasValue()) { + return false; + } + initializer->swap(value); + } + return true; +} + +/* (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)? (COMMA IDENTIFER + (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)?)* SEMICOLON */ +void Parser::globalVarDeclarationEnd(Position pos, + const dsl::DSLModifiers& mods, + dsl::DSLType baseType, + Token name) { + using namespace dsl; + DSLType type = baseType; + DSLExpression initializer; + if (!this->parseArrayDimensions(pos, &type)) { + return; + } + if (!this->parseInitializer(pos, &initializer)) { + return; + } + DSLGlobalVar first(mods, type, this->text(name), std::move(initializer), this->rangeFrom(pos), + this->position(name)); + Declare(first); + this->addToSymbolTable(first); + + while (this->checkNext(Token::Kind::TK_COMMA)) { + type = baseType; + Token identifierName; + if (!this->expectIdentifier(&identifierName)) { + return; + } + if (!this->parseArrayDimensions(pos, &type)) { + return; + } + DSLExpression anotherInitializer; + if (!this->parseInitializer(pos, &anotherInitializer)) { + return; + } + DSLGlobalVar next(mods, type, this->text(identifierName), std::move(anotherInitializer), + this->rangeFrom(identifierName)); + Declare(next); + this->addToSymbolTable(next, this->position(identifierName)); + } + this->expect(Token::Kind::TK_SEMICOLON, "';'"); +} + +/* (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)? (COMMA IDENTIFER + (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)?)* SEMICOLON */ +DSLStatement Parser::localVarDeclarationEnd(Position pos, + const dsl::DSLModifiers& mods, + dsl::DSLType baseType, + Token name) { + using namespace dsl; + DSLType type = baseType; + DSLExpression initializer; + if (!this->parseArrayDimensions(pos, &type)) { + return {}; + } + if (!this->parseInitializer(pos, &initializer)) { + return {}; + } + DSLVar first(mods, type, this->text(name), std::move(initializer), this->rangeFrom(pos), + this->position(name)); + DSLStatement result = Declare(first); + this->addToSymbolTable(first); + + while (this->checkNext(Token::Kind::TK_COMMA)) { + type = baseType; + Token identifierName; + if (!this->expectIdentifier(&identifierName)) { + return result; + } + if (!this->parseArrayDimensions(pos, &type)) { + return result; + } + DSLExpression anotherInitializer; + if (!this->parseInitializer(pos, &anotherInitializer)) { + return result; + } + DSLVar next(mods, type, this->text(identifierName), std::move(anotherInitializer), + this->rangeFrom(identifierName), this->position(identifierName)); + DSLWriter::AddVarDeclaration(result, next); + this->addToSymbolTable(next, this->position(identifierName)); + } + this->expect(Token::Kind::TK_SEMICOLON, "';'"); + result.setPosition(this->rangeFrom(pos)); + return result; +} + +/* (varDeclarations | expressionStatement) */ +DSLStatement Parser::varDeclarationsOrExpressionStatement() { + Token nextToken = this->peek(); + if (nextToken.fKind == Token::Kind::TK_CONST) { + // Statements that begin with `const` might be variable declarations, but can't be legal + // SkSL expression-statements. (SkSL constructors don't take a `const` modifier.) + return this->varDeclarations(); + } + + if (nextToken.fKind == Token::Kind::TK_HIGHP || + nextToken.fKind == Token::Kind::TK_MEDIUMP || + nextToken.fKind == Token::Kind::TK_LOWP || + this->symbolTable()->isType(this->text(nextToken))) { + // Statements that begin with a typename are most often variable declarations, but + // occasionally the type is part of a constructor, and these are actually expression- + // statements in disguise. First, attempt the common case: parse it as a vardecl. + Checkpoint checkpoint(this); + VarDeclarationsPrefix prefix; + if (this->varDeclarationsPrefix(&prefix)) { + checkpoint.accept(); + return this->localVarDeclarationEnd(prefix.fPosition, prefix.fModifiers, prefix.fType, + prefix.fName); + } + + // If this statement wasn't actually a vardecl after all, rewind and try parsing it as an + // expression-statement instead. + checkpoint.rewind(); + } + return this->expressionStatement(); +} + +// Helper function for varDeclarations(). If this function succeeds, we assume that the rest of the +// statement is a variable-declaration statement, not an expression-statement. +bool Parser::varDeclarationsPrefix(VarDeclarationsPrefix* prefixData) { + prefixData->fPosition = this->position(this->peek()); + prefixData->fModifiers = this->modifiers(); + prefixData->fType = this->type(&prefixData->fModifiers); + if (!prefixData->fType.hasValue()) { + return false; + } + return this->expectIdentifier(&prefixData->fName); +} + +/* modifiers type IDENTIFIER varDeclarationEnd */ +DSLStatement Parser::varDeclarations() { + VarDeclarationsPrefix prefix; + if (!this->varDeclarationsPrefix(&prefix)) { + return {}; + } + return this->localVarDeclarationEnd(prefix.fPosition, prefix.fModifiers, prefix.fType, + prefix.fName); +} + +/* STRUCT IDENTIFIER LBRACE varDeclaration* RBRACE */ +DSLType Parser::structDeclaration() { + Position start = this->position(this->peek()); + if (!this->expect(Token::Kind::TK_STRUCT, "'struct'")) { + return DSLType(nullptr); + } + Token name; + if (!this->expectIdentifier(&name)) { + return DSLType(nullptr); + } + if (!this->expect(Token::Kind::TK_LBRACE, "'{'")) { + return DSLType(nullptr); + } + AutoDepth depth(this); + if (!depth.increase()) { + return DSLType(nullptr); + } + SkTArray fields; + SkTHashSet fieldNames; + while (!this->checkNext(Token::Kind::TK_RBRACE)) { + Token fieldStart = this->peek(); + DSLModifiers modifiers = this->modifiers(); + DSLType type = this->type(&modifiers); + if (!type.hasValue()) { + return DSLType(nullptr); + } + + do { + DSLType actualType = type; + Token memberName; + if (!this->expectIdentifier(&memberName)) { + return DSLType(nullptr); + } + + while (this->checkNext(Token::Kind::TK_LBRACKET)) { + SKSL_INT size; + if (!this->arraySize(&size)) { + return DSLType(nullptr); + } + if (!this->expect(Token::Kind::TK_RBRACKET, "']'")) { + return DSLType(nullptr); + } + actualType = dsl::Array(actualType, size, + this->rangeFrom(this->position(fieldStart))); + } + + std::string_view nameText = this->text(memberName); + if (!fieldNames.contains(nameText)) { + fields.push_back(DSLField(modifiers, + std::move(actualType), + nameText, + this->rangeFrom(fieldStart))); + fieldNames.add(nameText); + } else { + this->error(memberName, "field '" + std::string(nameText) + + "' was already defined in the same struct ('" + + std::string(this->text(name)) + "')"); + } + } while (this->checkNext(Token::Kind::TK_COMMA)); + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return DSLType(nullptr); + } + } + if (fields.empty()) { + this->error(this->rangeFrom(start), "struct '" + std::string(this->text(name)) + + "' must contain at least one field"); + } + return dsl::Struct(this->text(name), SkSpan(fields), this->rangeFrom(start)); +} + +/* structDeclaration ((IDENTIFIER varDeclarationEnd) | SEMICOLON) */ +SkTArray Parser::structVarDeclaration(Position start, + const DSLModifiers& modifiers) { + DSLType type = this->structDeclaration(); + if (!type.hasValue()) { + return {}; + } + Token name; + if (this->checkIdentifier(&name)) { + this->globalVarDeclarationEnd(this->rangeFrom(name), modifiers, type, name); + } else { + this->expect(Token::Kind::TK_SEMICOLON, "';'"); + } + return {}; +} + +/* modifiers type IDENTIFIER (LBRACKET INT_LITERAL RBRACKET)? */ +std::optional Parser::parameter(size_t paramIndex) { + Position pos = this->position(this->peek()); + DSLModifiers modifiers = this->modifiers(); + DSLType type = this->type(&modifiers); + if (!type.hasValue()) { + return std::nullopt; + } + Token name; + std::string_view paramText; + Position paramPos; + if (this->checkIdentifier(&name)) { + paramText = this->text(name); + paramPos = this->position(name); + } else { + paramPos = this->rangeFrom(pos); + } + if (!this->parseArrayDimensions(pos, &type)) { + return std::nullopt; + } + return DSLParameter(modifiers, type, paramText, this->rangeFrom(pos), paramPos); +} + +/** EQ INT_LITERAL */ +int Parser::layoutInt() { + if (!this->expect(Token::Kind::TK_EQ, "'='")) { + return -1; + } + Token resultToken; + if (!this->expect(Token::Kind::TK_INT_LITERAL, "a non-negative integer", &resultToken)) { + return -1; + } + std::string_view resultFrag = this->text(resultToken); + SKSL_INT resultValue; + if (!SkSL::stoi(resultFrag, &resultValue)) { + this->error(resultToken, "value in layout is too large: " + std::string(resultFrag)); + return -1; + } + return resultValue; +} + +/** EQ IDENTIFIER */ +std::string_view Parser::layoutIdentifier() { + if (!this->expect(Token::Kind::TK_EQ, "'='")) { + return {}; + } + Token resultToken; + if (!this->expectIdentifier(&resultToken)) { + return {}; + } + return this->text(resultToken); +} + +/* LAYOUT LPAREN IDENTIFIER (EQ INT_LITERAL)? (COMMA IDENTIFIER (EQ INT_LITERAL)?)* RPAREN */ +DSLLayout Parser::layout() { + enum class LayoutToken { + LOCATION, + OFFSET, + BINDING, + TEXTURE, + SAMPLER, + INDEX, + SET, + BUILTIN, + INPUT_ATTACHMENT_INDEX, + ORIGIN_UPPER_LEFT, + BLEND_SUPPORT_ALL_EQUATIONS, + PUSH_CONSTANT, + COLOR, + SPIRV, + METAL, + GL, + WGSL + }; + + using LayoutMap = SkTHashMap; + static LayoutMap* sLayoutTokens = new LayoutMap{ + {"location", LayoutToken::LOCATION}, + {"offset", LayoutToken::OFFSET}, + {"binding", LayoutToken::BINDING}, + {"texture", LayoutToken::TEXTURE}, + {"sampler", LayoutToken::SAMPLER}, + {"index", LayoutToken::INDEX}, + {"set", LayoutToken::SET}, + {"builtin", LayoutToken::BUILTIN}, + {"input_attachment_index", LayoutToken::INPUT_ATTACHMENT_INDEX}, + {"origin_upper_left", LayoutToken::ORIGIN_UPPER_LEFT}, + {"blend_support_all_equations", LayoutToken::BLEND_SUPPORT_ALL_EQUATIONS}, + {"push_constant", LayoutToken::PUSH_CONSTANT}, + {"color", LayoutToken::COLOR}, + {"spirv", LayoutToken::SPIRV}, + {"metal", LayoutToken::METAL}, + {"gl", LayoutToken::GL}, + {"wgsl", LayoutToken::WGSL}, + }; + + DSLLayout result; + if (this->checkNext(Token::Kind::TK_LAYOUT)) { + if (!this->expect(Token::Kind::TK_LPAREN, "'('")) { + return result; + } + for (;;) { + Token t = this->nextToken(); + std::string text(this->text(t)); + LayoutToken* found = sLayoutTokens->find(text); + if (found != nullptr) { + switch (*found) { + case LayoutToken::SPIRV: + result.spirv(this->position(t)); + break; + case LayoutToken::METAL: + result.metal(this->position(t)); + break; + case LayoutToken::GL: + result.gl(this->position(t)); + break; + case LayoutToken::WGSL: + result.wgsl(this->position(t)); + break; + case LayoutToken::ORIGIN_UPPER_LEFT: + result.originUpperLeft(this->position(t)); + break; + case LayoutToken::PUSH_CONSTANT: + result.pushConstant(this->position(t)); + break; + case LayoutToken::BLEND_SUPPORT_ALL_EQUATIONS: + result.blendSupportAllEquations(this->position(t)); + break; + case LayoutToken::COLOR: + result.color(this->position(t)); + break; + case LayoutToken::LOCATION: + result.location(this->layoutInt(), this->position(t)); + break; + case LayoutToken::OFFSET: + result.offset(this->layoutInt(), this->position(t)); + break; + case LayoutToken::BINDING: + result.binding(this->layoutInt(), this->position(t)); + break; + case LayoutToken::INDEX: + result.index(this->layoutInt(), this->position(t)); + break; + case LayoutToken::SET: + result.set(this->layoutInt(), this->position(t)); + break; + case LayoutToken::TEXTURE: + result.texture(this->layoutInt(), this->position(t)); + break; + case LayoutToken::SAMPLER: + result.sampler(this->layoutInt(), this->position(t)); + break; + case LayoutToken::BUILTIN: + result.builtin(this->layoutInt(), this->position(t)); + break; + case LayoutToken::INPUT_ATTACHMENT_INDEX: + result.inputAttachmentIndex(this->layoutInt(), this->position(t)); + break; + } + } else { + this->error(t, "'" + text + "' is not a valid layout qualifier"); + } + if (this->checkNext(Token::Kind::TK_RPAREN)) { + break; + } + if (!this->expect(Token::Kind::TK_COMMA, "','")) { + break; + } + } + } + return result; +} + +/* layout? (UNIFORM | CONST | IN | OUT | INOUT | LOWP | MEDIUMP | HIGHP | FLAT | NOPERSPECTIVE | + VARYING | INLINE | WORKGROUP | READONLY | WRITEONLY | BUFFER)* */ +DSLModifiers Parser::modifiers() { + int start = this->peek().fOffset; + DSLLayout layout = this->layout(); + Token raw = this->nextRawToken(); + int end = raw.fOffset; + if (!is_whitespace(raw.fKind)) { + this->pushback(raw); + } + int flags = 0; + for (;;) { + int tokenFlag = parse_modifier_token(peek().fKind); + if (!tokenFlag) { + break; + } + Token modifier = this->nextToken(); + if (int duplicateFlags = (tokenFlag & flags)) { + this->error(modifier, "'" + Modifiers::DescribeFlags(duplicateFlags) + + "' appears more than once"); + } + flags |= tokenFlag; + end = this->position(modifier).endOffset(); + } + return DSLModifiers(std::move(layout), flags, Position::Range(start, end)); +} + +/* ifStatement | forStatement | doStatement | whileStatement | block | expression */ +DSLStatement Parser::statement() { + Token start = this->nextToken(); + AutoDepth depth(this); + if (!depth.increase()) { + return {}; + } + this->pushback(start); + switch (start.fKind) { + case Token::Kind::TK_IF: + return this->ifStatement(); + case Token::Kind::TK_FOR: + return this->forStatement(); + case Token::Kind::TK_DO: + return this->doStatement(); + case Token::Kind::TK_WHILE: + return this->whileStatement(); + case Token::Kind::TK_SWITCH: + return this->switchStatement(); + case Token::Kind::TK_RETURN: + return this->returnStatement(); + case Token::Kind::TK_BREAK: + return this->breakStatement(); + case Token::Kind::TK_CONTINUE: + return this->continueStatement(); + case Token::Kind::TK_DISCARD: + return this->discardStatement(); + case Token::Kind::TK_LBRACE: { + std::optional result = this->block(); + return result ? DSLStatement(std::move(*result)) : DSLStatement(); + } + case Token::Kind::TK_SEMICOLON: + this->nextToken(); + return DSLBlock(); + case Token::Kind::TK_HIGHP: + case Token::Kind::TK_MEDIUMP: + case Token::Kind::TK_LOWP: + case Token::Kind::TK_CONST: + case Token::Kind::TK_IDENTIFIER: + return this->varDeclarationsOrExpressionStatement(); + default: + return this->expressionStatement(); + } +} + +/* IDENTIFIER(type) (LBRACKET intLiteral? RBRACKET)* QUESTION? */ +DSLType Parser::type(DSLModifiers* modifiers) { + Token type; + if (!this->expect(Token::Kind::TK_IDENTIFIER, "a type", &type)) { + return DSLType(nullptr); + } + if (!this->symbolTable()->isType(this->text(type))) { + this->error(type, "no type named '" + std::string(this->text(type)) + "'"); + return DSLType::Invalid(); + } + DSLType result(this->text(type), modifiers, this->position(type)); + if (result.isInterfaceBlock()) { + // SkSL puts interface blocks into the symbol table, but they aren't general-purpose types; + // you can't use them to declare a variable type or a function return type. + this->error(type, "expected a type, found '" + std::string(this->text(type)) + "'"); + return DSLType::Invalid(); + } + Token bracket; + while (this->checkNext(Token::Kind::TK_LBRACKET, &bracket)) { + if (this->checkNext(Token::Kind::TK_RBRACKET)) { + if (this->allowUnsizedArrays()) { + result = UnsizedArray(result, this->rangeFrom(type)); + } else { + this->error(this->rangeFrom(bracket), "unsized arrays are not permitted here"); + } + } else { + SKSL_INT size; + if (!this->arraySize(&size)) { + return DSLType(nullptr); + } + this->expect(Token::Kind::TK_RBRACKET, "']'"); + result = Array(result, size, this->rangeFrom(type)); + } + } + return result; +} + +/* IDENTIFIER LBRACE + varDeclaration+ + RBRACE (IDENTIFIER (LBRACKET expression RBRACKET)*)? SEMICOLON */ +bool Parser::interfaceBlock(const dsl::DSLModifiers& modifiers) { + Token typeName; + if (!this->expectIdentifier(&typeName)) { + return false; + } + if (this->peek().fKind != Token::Kind::TK_LBRACE) { + // we only get into interfaceBlock if we found a top-level identifier which was not a type. + // 99% of the time, the user was not actually intending to create an interface block, so + // it's better to report it as an unknown type + this->error(typeName, "no type named '" + std::string(this->text(typeName)) + "'"); + return false; + } + this->nextToken(); + SkTArray fields; + SkTHashSet fieldNames; + while (!this->checkNext(Token::Kind::TK_RBRACE)) { + Position fieldPos = this->position(this->peek()); + DSLModifiers fieldModifiers = this->modifiers(); + DSLType type = this->type(&fieldModifiers); + if (!type.hasValue()) { + return false; + } + do { + Token fieldName; + if (!this->expectIdentifier(&fieldName)) { + return false; + } + DSLType actualType = type; + if (this->checkNext(Token::Kind::TK_LBRACKET)) { + Token sizeToken = this->peek(); + if (sizeToken.fKind != Token::Kind::TK_RBRACKET) { + SKSL_INT size; + if (!this->arraySize(&size)) { + return false; + } + actualType = Array(std::move(actualType), size, this->position(typeName)); + } else if (this->allowUnsizedArrays()) { + actualType = UnsizedArray(std::move(actualType), this->position(typeName)); + } else { + this->error(sizeToken, "unsized arrays are not permitted here"); + } + this->expect(Token::Kind::TK_RBRACKET, "']'"); + } + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return false; + } + + std::string_view nameText = this->text(fieldName); + if (!fieldNames.contains(nameText)) { + fields.push_back(DSLField(fieldModifiers, + std::move(actualType), + nameText, + this->rangeFrom(fieldPos))); + fieldNames.add(nameText); + } else { + this->error(fieldName, "field '" + std::string(nameText) + + "' was already defined in the same interface block ('" + + std::string(this->text(typeName)) + "')"); + } + } while (this->checkNext(Token::Kind::TK_COMMA)); + } + if (fields.empty()) { + this->error(this->rangeFrom(typeName), "interface block '" + + std::string(this->text(typeName)) + "' must contain at least one member"); + } + std::string_view instanceName; + Token instanceNameToken; + SKSL_INT size = 0; + if (this->checkIdentifier(&instanceNameToken)) { + instanceName = this->text(instanceNameToken); + if (this->checkNext(Token::Kind::TK_LBRACKET)) { + if (!this->arraySize(&size)) { + return false; + } + this->expect(Token::Kind::TK_RBRACKET, "']'"); + } + } + if (!fields.empty()) { + dsl::InterfaceBlock(modifiers, this->text(typeName), std::move(fields), instanceName, + size, this->position(typeName)); + } + this->expect(Token::Kind::TK_SEMICOLON, "';'"); + return true; +} + +/* IF LPAREN expression RPAREN statement (ELSE statement)? */ +DSLStatement Parser::ifStatement() { + Token start; + if (!this->expect(Token::Kind::TK_IF, "'if'", &start)) { + return {}; + } + if (!this->expect(Token::Kind::TK_LPAREN, "'('")) { + return {}; + } + DSLExpression test = this->expression(); + if (!test.hasValue()) { + return {}; + } + if (!this->expect(Token::Kind::TK_RPAREN, "')'")) { + return {}; + } + DSLStatement ifTrue = this->statement(); + if (!ifTrue.hasValue()) { + return {}; + } + DSLStatement ifFalse; + if (this->checkNext(Token::Kind::TK_ELSE)) { + ifFalse = this->statement(); + if (!ifFalse.hasValue()) { + return {}; + } + } + Position pos = this->rangeFrom(start); + return If(std::move(test), std::move(ifTrue), + ifFalse.hasValue() ? std::move(ifFalse) : DSLStatement(), pos); +} + +/* DO statement WHILE LPAREN expression RPAREN SEMICOLON */ +DSLStatement Parser::doStatement() { + Token start; + if (!this->expect(Token::Kind::TK_DO, "'do'", &start)) { + return {}; + } + DSLStatement statement = this->statement(); + if (!statement.hasValue()) { + return {}; + } + if (!this->expect(Token::Kind::TK_WHILE, "'while'")) { + return {}; + } + if (!this->expect(Token::Kind::TK_LPAREN, "'('")) { + return {}; + } + DSLExpression test = this->expression(); + if (!test.hasValue()) { + return {}; + } + if (!this->expect(Token::Kind::TK_RPAREN, "')'")) { + return {}; + } + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return {}; + } + return Do(std::move(statement), std::move(test), this->rangeFrom(start)); +} + +/* WHILE LPAREN expression RPAREN STATEMENT */ +DSLStatement Parser::whileStatement() { + Token start; + if (!this->expect(Token::Kind::TK_WHILE, "'while'", &start)) { + return {}; + } + if (!this->expect(Token::Kind::TK_LPAREN, "'('")) { + return {}; + } + DSLExpression test = this->expression(); + if (!test.hasValue()) { + return {}; + } + if (!this->expect(Token::Kind::TK_RPAREN, "')'")) { + return {}; + } + DSLStatement statement = this->statement(); + if (!statement.hasValue()) { + return {}; + } + return While(std::move(test), std::move(statement), this->rangeFrom(start)); +} + +/* CASE expression COLON statement* */ +std::optional Parser::switchCase() { + Token start; + if (!this->expect(Token::Kind::TK_CASE, "'case'", &start)) { + return {}; + } + DSLExpression value = this->expression(); + if (!value.hasValue()) { + return {}; + } + if (!this->expect(Token::Kind::TK_COLON, "':'")) { + return {}; + } + SkTArray statements; + while (this->peek().fKind != Token::Kind::TK_RBRACE && + this->peek().fKind != Token::Kind::TK_CASE && + this->peek().fKind != Token::Kind::TK_DEFAULT) { + DSLStatement s = this->statement(); + if (!s.hasValue()) { + return {}; + } + statements.push_back(std::move(s)); + } + return DSLCase(std::move(value), std::move(statements)); +} + +/* SWITCH LPAREN expression RPAREN LBRACE switchCase* (DEFAULT COLON statement*)? RBRACE */ +DSLStatement Parser::switchStatement() { + Token start; + if (!this->expect(Token::Kind::TK_SWITCH, "'switch'", &start)) { + return {}; + } + if (!this->expect(Token::Kind::TK_LPAREN, "'('")) { + return {}; + } + DSLExpression value = this->expression(); + if (!value.hasValue()) { + return {}; + } + if (!this->expect(Token::Kind::TK_RPAREN, "')'")) { + return {}; + } + if (!this->expect(Token::Kind::TK_LBRACE, "'{'")) { + return {}; + } + SkTArray cases; + while (this->peek().fKind == Token::Kind::TK_CASE) { + std::optional c = this->switchCase(); + if (!c) { + return {}; + } + cases.push_back(std::move(*c)); + } + // Requiring default: to be last (in defiance of C and GLSL) was a deliberate decision. Other + // parts of the compiler may rely upon this assumption. + if (this->peek().fKind == Token::Kind::TK_DEFAULT) { + SkTArray statements; + Token defaultStart; + SkAssertResult(this->expect(Token::Kind::TK_DEFAULT, "'default'", &defaultStart)); + if (!this->expect(Token::Kind::TK_COLON, "':'")) { + return {}; + } + while (this->peek().fKind != Token::Kind::TK_RBRACE) { + DSLStatement s = this->statement(); + if (!s.hasValue()) { + return {}; + } + statements.push_back(std::move(s)); + } + cases.push_back(DSLCase(DSLExpression(), std::move(statements), this->position(start))); + } + if (!this->expect(Token::Kind::TK_RBRACE, "'}'")) { + return {}; + } + Position pos = this->rangeFrom(start); + return Switch(std::move(value), std::move(cases), pos); +} + +static Position range_of_at_least_one_char(int start, int end) { + return Position::Range(start, std::max(end, start + 1)); +} + +/* FOR LPAREN (declaration | expression)? SEMICOLON expression? SEMICOLON expression? RPAREN + STATEMENT */ +dsl::DSLStatement Parser::forStatement() { + Token start; + if (!this->expect(Token::Kind::TK_FOR, "'for'", &start)) { + return {}; + } + Token lparen; + if (!this->expect(Token::Kind::TK_LPAREN, "'('", &lparen)) { + return {}; + } + AutoSymbolTable symbols(this); + dsl::DSLStatement initializer; + Token nextToken = this->peek(); + int firstSemicolonOffset; + if (nextToken.fKind == Token::Kind::TK_SEMICOLON) { + // An empty init-statement. + firstSemicolonOffset = this->nextToken().fOffset; + } else { + // The init-statement must be an expression or variable declaration. + initializer = this->varDeclarationsOrExpressionStatement(); + if (!initializer.hasValue()) { + return {}; + } + firstSemicolonOffset = fLexer.getCheckpoint().fOffset - 1; + } + dsl::DSLExpression test; + if (this->peek().fKind != Token::Kind::TK_SEMICOLON) { + dsl::DSLExpression testValue = this->expression(); + if (!testValue.hasValue()) { + return {}; + } + test.swap(testValue); + } + Token secondSemicolon; + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'", &secondSemicolon)) { + return {}; + } + dsl::DSLExpression next; + if (this->peek().fKind != Token::Kind::TK_RPAREN) { + dsl::DSLExpression nextValue = this->expression(); + if (!nextValue.hasValue()) { + return {}; + } + next.swap(nextValue); + } + Token rparen; + if (!this->expect(Token::Kind::TK_RPAREN, "')'", &rparen)) { + return {}; + } + dsl::DSLStatement statement = this->statement(); + if (!statement.hasValue()) { + return {}; + } + return For(initializer.hasValue() ? std::move(initializer) : DSLStatement(), + test.hasValue() ? std::move(test) : DSLExpression(), + next.hasValue() ? std::move(next) : DSLExpression(), + std::move(statement), + this->rangeFrom(start), + ForLoopPositions{ + range_of_at_least_one_char(lparen.fOffset + 1, firstSemicolonOffset), + range_of_at_least_one_char(firstSemicolonOffset + 1, secondSemicolon.fOffset), + range_of_at_least_one_char(secondSemicolon.fOffset + 1, rparen.fOffset) + }); +} + +/* RETURN expression? SEMICOLON */ +DSLStatement Parser::returnStatement() { + Token start; + if (!this->expect(Token::Kind::TK_RETURN, "'return'", &start)) { + return {}; + } + DSLExpression expression; + if (this->peek().fKind != Token::Kind::TK_SEMICOLON) { + DSLExpression next = this->expression(); + if (!next.hasValue()) { + return {}; + } + expression.swap(next); + } + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return {}; + } + return Return(expression.hasValue() ? std::move(expression) : DSLExpression(), + this->rangeFrom(start)); +} + +/* BREAK SEMICOLON */ +DSLStatement Parser::breakStatement() { + Token start; + if (!this->expect(Token::Kind::TK_BREAK, "'break'", &start)) { + return {}; + } + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return {}; + } + return Break(this->position(start)); +} + +/* CONTINUE SEMICOLON */ +DSLStatement Parser::continueStatement() { + Token start; + if (!this->expect(Token::Kind::TK_CONTINUE, "'continue'", &start)) { + return {}; + } + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return {}; + } + return Continue(this->position(start)); +} + +/* DISCARD SEMICOLON */ +DSLStatement Parser::discardStatement() { + Token start; + if (!this->expect(Token::Kind::TK_DISCARD, "'continue'", &start)) { + return {}; + } + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return {}; + } + return Discard(this->position(start)); +} + +/* LBRACE statement* RBRACE */ +std::optional Parser::block() { + Token start; + if (!this->expect(Token::Kind::TK_LBRACE, "'{'", &start)) { + return std::nullopt; + } + AutoDepth depth(this); + if (!depth.increase()) { + return std::nullopt; + } + AutoSymbolTable symbols(this); + StatementArray statements; + for (;;) { + switch (this->peek().fKind) { + case Token::Kind::TK_RBRACE: + this->nextToken(); + return DSLBlock(std::move(statements), this->symbolTable(), this->rangeFrom(start)); + case Token::Kind::TK_END_OF_FILE: + this->error(this->peek(), "expected '}', but found end of file"); + return std::nullopt; + default: { + DSLStatement statement = this->statement(); + if (fEncounteredFatalError) { + return std::nullopt; + } + if (statement.hasValue()) { + statements.push_back(statement.release()); + } + break; + } + } + } +} + +/* expression SEMICOLON */ +DSLStatement Parser::expressionStatement() { + DSLExpression expr = this->expression(); + if (expr.hasValue()) { + if (!this->expect(Token::Kind::TK_SEMICOLON, "';'")) { + return {}; + } + return DSLStatement(std::move(expr)); + } + return {}; +} + +bool Parser::operatorRight(Parser::AutoDepth& depth, + Operator::Kind op, + BinaryParseFn rightFn, + DSLExpression& result) { + this->nextToken(); + if (!depth.increase()) { + return false; + } + DSLExpression right = (this->*rightFn)(); + if (!right.hasValue()) { + return false; + } + Position pos = result.position().rangeThrough(right.position()); + DSLExpression next = result.binary(op, std::move(right), pos); + result.swap(next); + return true; +} + +/* assignmentExpression (COMMA assignmentExpression)* */ +DSLExpression Parser::expression() { + [[maybe_unused]] Token start = this->peek(); + DSLExpression result = this->assignmentExpression(); + if (!result.hasValue()) { + return {}; + } + Token t; + AutoDepth depth(this); + while (this->peek().fKind == Token::Kind::TK_COMMA) { + if (!operatorRight(depth, Operator::Kind::COMMA, &Parser::assignmentExpression, + result)) { + return {}; + } + } + SkASSERTF(result.position().valid(), "Expression %s has invalid position", + result.description().c_str()); + SkASSERTF(result.position().startOffset() == this->position(start).startOffset(), + "Expected %s to start at %d (first token: '%.*s'), but it has range %d-%d\n", + result.description().c_str(), this->position(start).startOffset(), + (int)this->text(start).length(), this->text(start).data(), + result.position().startOffset(), result.position().endOffset()); + return result; +} + +/* ternaryExpression ((EQEQ | STAREQ | SLASHEQ | PERCENTEQ | PLUSEQ | MINUSEQ | SHLEQ | SHREQ | + BITWISEANDEQ | BITWISEXOREQ | BITWISEOREQ | LOGICALANDEQ | LOGICALXOREQ | LOGICALOREQ) + assignmentExpression)* + */ +DSLExpression Parser::assignmentExpression() { + AutoDepth depth(this); + DSLExpression result = this->ternaryExpression(); + if (!result.hasValue()) { + return {}; + } + for (;;) { + switch (this->peek().fKind) { + case Token::Kind::TK_EQ: + if (!operatorRight(depth, Operator::Kind::EQ, &Parser::assignmentExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_STAREQ: + if (!operatorRight(depth, Operator::Kind::STAREQ, &Parser::assignmentExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_SLASHEQ: + if (!operatorRight(depth, Operator::Kind::SLASHEQ, &Parser::assignmentExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_PERCENTEQ: + if (!operatorRight(depth, Operator::Kind::PERCENTEQ, + &Parser::assignmentExpression, result)) { + return {}; + } + break; + case Token::Kind::TK_PLUSEQ: + if (!operatorRight(depth, Operator::Kind::PLUSEQ, &Parser::assignmentExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_MINUSEQ: + if (!operatorRight(depth, Operator::Kind::MINUSEQ, &Parser::assignmentExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_SHLEQ: + if (!operatorRight(depth, Operator::Kind::SHLEQ, &Parser::assignmentExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_SHREQ: + if (!operatorRight(depth, Operator::Kind::SHREQ, &Parser::assignmentExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_BITWISEANDEQ: + if (!operatorRight(depth, Operator::Kind::BITWISEANDEQ, + &Parser::assignmentExpression, result)) { + return {}; + } + break; + case Token::Kind::TK_BITWISEXOREQ: + if (!operatorRight(depth, Operator::Kind::BITWISEXOREQ, + &Parser::assignmentExpression, result)) { + return {}; + } + break; + case Token::Kind::TK_BITWISEOREQ: + if (!operatorRight(depth, Operator::Kind::BITWISEOREQ, + &Parser::assignmentExpression, result)) { + return {}; + } + break; + default: + return result; + } + } +} + +/* logicalOrExpression ('?' expression ':' assignmentExpression)? */ +DSLExpression Parser::ternaryExpression() { + DSLExpression base = this->logicalOrExpression(); + if (!base.hasValue()) { + return {}; + } + if (!this->checkNext(Token::Kind::TK_QUESTION)) { + return base; + } + AutoDepth depth(this); + if (!depth.increase()) { + return {}; + } + DSLExpression trueExpr = this->expression(); + if (!trueExpr.hasValue()) { + return {}; + } + if (!this->expect(Token::Kind::TK_COLON, "':'")) { + return {}; + } + DSLExpression falseExpr = this->assignmentExpression(); + if (!falseExpr.hasValue()) { + return {}; + } + Position pos = base.position().rangeThrough(falseExpr.position()); + return Select(std::move(base), std::move(trueExpr), std::move(falseExpr), pos); +} + +/* logicalXorExpression (LOGICALOR logicalXorExpression)* */ +DSLExpression Parser::logicalOrExpression() { + AutoDepth depth(this); + DSLExpression result = this->logicalXorExpression(); + if (!result.hasValue()) { + return {}; + } + while (this->peek().fKind == Token::Kind::TK_LOGICALOR) { + if (!operatorRight(depth, Operator::Kind::LOGICALOR, &Parser::logicalXorExpression, + result)) { + return {}; + } + } + return result; +} + +/* logicalAndExpression (LOGICALXOR logicalAndExpression)* */ +DSLExpression Parser::logicalXorExpression() { + AutoDepth depth(this); + DSLExpression result = this->logicalAndExpression(); + if (!result.hasValue()) { + return {}; + } + while (this->peek().fKind == Token::Kind::TK_LOGICALXOR) { + if (!operatorRight(depth, Operator::Kind::LOGICALXOR, &Parser::logicalAndExpression, + result)) { + return {}; + } + } + return result; +} + +/* bitwiseOrExpression (LOGICALAND bitwiseOrExpression)* */ +DSLExpression Parser::logicalAndExpression() { + AutoDepth depth(this); + DSLExpression result = this->bitwiseOrExpression(); + if (!result.hasValue()) { + return {}; + } + while (this->peek().fKind == Token::Kind::TK_LOGICALAND) { + if (!operatorRight(depth, Operator::Kind::LOGICALAND, &Parser::bitwiseOrExpression, + result)) { + return {}; + } + } + return result; +} + +/* bitwiseXorExpression (BITWISEOR bitwiseXorExpression)* */ +DSLExpression Parser::bitwiseOrExpression() { + AutoDepth depth(this); + DSLExpression result = this->bitwiseXorExpression(); + if (!result.hasValue()) { + return {}; + } + while (this->peek().fKind == Token::Kind::TK_BITWISEOR) { + if (!operatorRight(depth, Operator::Kind::BITWISEOR, &Parser::bitwiseXorExpression, + result)) { + return {}; + } + } + return result; +} + +/* bitwiseAndExpression (BITWISEXOR bitwiseAndExpression)* */ +DSLExpression Parser::bitwiseXorExpression() { + AutoDepth depth(this); + DSLExpression result = this->bitwiseAndExpression(); + if (!result.hasValue()) { + return {}; + } + while (this->peek().fKind == Token::Kind::TK_BITWISEXOR) { + if (!operatorRight(depth, Operator::Kind::BITWISEXOR, &Parser::bitwiseAndExpression, + result)) { + return {}; + } + } + return result; +} + +/* equalityExpression (BITWISEAND equalityExpression)* */ +DSLExpression Parser::bitwiseAndExpression() { + AutoDepth depth(this); + DSLExpression result = this->equalityExpression(); + if (!result.hasValue()) { + return {}; + } + while (this->peek().fKind == Token::Kind::TK_BITWISEAND) { + if (!operatorRight(depth, Operator::Kind::BITWISEAND, &Parser::equalityExpression, + result)) { + return {}; + } + } + return result; +} + +/* relationalExpression ((EQEQ | NEQ) relationalExpression)* */ +DSLExpression Parser::equalityExpression() { + AutoDepth depth(this); + DSLExpression result = this->relationalExpression(); + if (!result.hasValue()) { + return {}; + } + for (;;) { + switch (this->peek().fKind) { + case Token::Kind::TK_EQEQ: + if (!operatorRight(depth, Operator::Kind::EQEQ, &Parser::relationalExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_NEQ: + if (!operatorRight(depth, Operator::Kind::NEQ, &Parser::relationalExpression, + result)) { + return {}; + } + break; + default: return result; + } + } +} + +/* shiftExpression ((LT | GT | LTEQ | GTEQ) shiftExpression)* */ +DSLExpression Parser::relationalExpression() { + AutoDepth depth(this); + DSLExpression result = this->shiftExpression(); + if (!result.hasValue()) { + return {}; + } + for (;;) { + switch (this->peek().fKind) { + case Token::Kind::TK_LT: + if (!operatorRight(depth, Operator::Kind::LT, &Parser::shiftExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_GT: + if (!operatorRight(depth, Operator::Kind::GT, &Parser::shiftExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_LTEQ: + if (!operatorRight(depth, Operator::Kind::LTEQ, &Parser::shiftExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_GTEQ: + if (!operatorRight(depth, Operator::Kind::GTEQ, &Parser::shiftExpression, + result)) { + return {}; + } + break; + default: + return result; + } + } +} + +/* additiveExpression ((SHL | SHR) additiveExpression)* */ +DSLExpression Parser::shiftExpression() { + AutoDepth depth(this); + DSLExpression result = this->additiveExpression(); + if (!result.hasValue()) { + return {}; + } + for (;;) { + switch (this->peek().fKind) { + case Token::Kind::TK_SHL: + if (!operatorRight(depth, Operator::Kind::SHL, &Parser::additiveExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_SHR: + if (!operatorRight(depth, Operator::Kind::SHR, &Parser::additiveExpression, + result)) { + return {}; + } + break; + default: + return result; + } + } +} + +/* multiplicativeExpression ((PLUS | MINUS) multiplicativeExpression)* */ +DSLExpression Parser::additiveExpression() { + AutoDepth depth(this); + DSLExpression result = this->multiplicativeExpression(); + if (!result.hasValue()) { + return {}; + } + for (;;) { + switch (this->peek().fKind) { + case Token::Kind::TK_PLUS: + if (!operatorRight(depth, Operator::Kind::PLUS, + &Parser::multiplicativeExpression, result)) { + return {}; + } + break; + case Token::Kind::TK_MINUS: + if (!operatorRight(depth, Operator::Kind::MINUS, + &Parser::multiplicativeExpression, result)) { + return {}; + } + break; + default: + return result; + } + } +} + +/* unaryExpression ((STAR | SLASH | PERCENT) unaryExpression)* */ +DSLExpression Parser::multiplicativeExpression() { + AutoDepth depth(this); + DSLExpression result = this->unaryExpression(); + if (!result.hasValue()) { + return {}; + } + for (;;) { + switch (this->peek().fKind) { + case Token::Kind::TK_STAR: + if (!operatorRight(depth, Operator::Kind::STAR, &Parser::unaryExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_SLASH: + if (!operatorRight(depth, Operator::Kind::SLASH, &Parser::unaryExpression, + result)) { + return {}; + } + break; + case Token::Kind::TK_PERCENT: + if (!operatorRight(depth, Operator::Kind::PERCENT, &Parser::unaryExpression, + result)) { + return {}; + } + break; + default: return result; + } + } +} + +/* postfixExpression | (PLUS | MINUS | NOT | PLUSPLUS | MINUSMINUS) unaryExpression */ +DSLExpression Parser::unaryExpression() { + AutoDepth depth(this); + Token start = this->peek(); + switch (start.fKind) { + case Token::Kind::TK_PLUS: + case Token::Kind::TK_MINUS: + case Token::Kind::TK_LOGICALNOT: + case Token::Kind::TK_BITWISENOT: + case Token::Kind::TK_PLUSPLUS: + case Token::Kind::TK_MINUSMINUS: { + this->nextToken(); + if (!depth.increase()) { + return {}; + } + DSLExpression expr = this->unaryExpression(); + if (!expr.hasValue()) { + return {}; + } + Position p = Position::Range(start.fOffset, expr.position().endOffset()); + switch (start.fKind) { + case Token::Kind::TK_PLUS: return expr.prefix(Operator::Kind::PLUS, p); + case Token::Kind::TK_MINUS: return expr.prefix(Operator::Kind::MINUS, p); + case Token::Kind::TK_LOGICALNOT: return expr.prefix(Operator::Kind::LOGICALNOT, p); + case Token::Kind::TK_BITWISENOT: return expr.prefix(Operator::Kind::BITWISENOT, p); + case Token::Kind::TK_PLUSPLUS: return expr.prefix(Operator::Kind::PLUSPLUS, p); + case Token::Kind::TK_MINUSMINUS: return expr.prefix(Operator::Kind::MINUSMINUS, p); + default: SkUNREACHABLE; + } + } + default: + return this->postfixExpression(); + } +} + +/* term suffix* */ +DSLExpression Parser::postfixExpression() { + AutoDepth depth(this); + DSLExpression result = this->term(); + if (!result.hasValue()) { + return {}; + } + for (;;) { + Token t = this->peek(); + switch (t.fKind) { + case Token::Kind::TK_FLOAT_LITERAL: + if (this->text(t)[0] != '.') { + return result; + } + [[fallthrough]]; + case Token::Kind::TK_LBRACKET: + case Token::Kind::TK_DOT: + case Token::Kind::TK_LPAREN: + case Token::Kind::TK_PLUSPLUS: + case Token::Kind::TK_MINUSMINUS: { + if (!depth.increase()) { + return {}; + } + DSLExpression next = this->suffix(std::move(result)); + if (!next.hasValue()) { + return {}; + } + result.swap(next); + break; + } + default: + return result; + } + } +} + +DSLExpression Parser::swizzle(Position pos, + DSLExpression base, + std::string_view swizzleMask, + Position maskPos) { + SkASSERT(swizzleMask.length() > 0); + if (!base.type().isVector() && !base.type().isScalar()) { + return base.field(swizzleMask, pos); + } + int length = swizzleMask.length(); + SkSL::SwizzleComponent::Type components[4]; + for (int i = 0; i < length; ++i) { + if (i >= 4) { + Position errorPos = maskPos.valid() ? Position::Range(maskPos.startOffset() + 4, + maskPos.endOffset()) + : pos; + this->error(errorPos, "too many components in swizzle mask"); + return DSLExpression::Poison(pos); + } + switch (swizzleMask[i]) { + case '0': components[i] = SwizzleComponent::ZERO; break; + case '1': components[i] = SwizzleComponent::ONE; break; + case 'r': components[i] = SwizzleComponent::R; break; + case 'x': components[i] = SwizzleComponent::X; break; + case 's': components[i] = SwizzleComponent::S; break; + case 'L': components[i] = SwizzleComponent::UL; break; + case 'g': components[i] = SwizzleComponent::G; break; + case 'y': components[i] = SwizzleComponent::Y; break; + case 't': components[i] = SwizzleComponent::T; break; + case 'T': components[i] = SwizzleComponent::UT; break; + case 'b': components[i] = SwizzleComponent::B; break; + case 'z': components[i] = SwizzleComponent::Z; break; + case 'p': components[i] = SwizzleComponent::P; break; + case 'R': components[i] = SwizzleComponent::UR; break; + case 'a': components[i] = SwizzleComponent::A; break; + case 'w': components[i] = SwizzleComponent::W; break; + case 'q': components[i] = SwizzleComponent::Q; break; + case 'B': components[i] = SwizzleComponent::UB; break; + default: { + Position componentPos = Position::Range(maskPos.startOffset() + i, + maskPos.startOffset() + i + 1); + this->error(componentPos, String::printf("invalid swizzle component '%c'", + swizzleMask[i]).c_str()); + return DSLExpression::Poison(pos); + } + } + } + switch (length) { + case 1: return dsl::Swizzle(std::move(base), components[0], pos, maskPos); + case 2: return dsl::Swizzle(std::move(base), components[0], components[1], pos, maskPos); + case 3: return dsl::Swizzle(std::move(base), components[0], components[1], components[2], + pos, maskPos); + case 4: return dsl::Swizzle(std::move(base), components[0], components[1], components[2], + components[3], pos, maskPos); + default: SkUNREACHABLE; + } +} + +dsl::DSLExpression Parser::call(Position pos, dsl::DSLExpression base, ExpressionArray args) { + return base(std::move(args), pos); +} + +/* LBRACKET expression? RBRACKET | DOT IDENTIFIER | LPAREN arguments RPAREN | + PLUSPLUS | MINUSMINUS | COLONCOLON IDENTIFIER | FLOAT_LITERAL [IDENTIFIER] */ +DSLExpression Parser::suffix(DSLExpression base) { + Token next = this->nextToken(); + AutoDepth depth(this); + if (!depth.increase()) { + return {}; + } + switch (next.fKind) { + case Token::Kind::TK_LBRACKET: { + if (this->checkNext(Token::Kind::TK_RBRACKET)) { + this->error(this->rangeFrom(next), "missing index in '[]'"); + return DSLExpression::Poison(this->rangeFrom(base.position())); + } + DSLExpression index = this->expression(); + if (!index.hasValue()) { + return {}; + } + this->expect(Token::Kind::TK_RBRACKET, "']' to complete array access expression"); + return base.index(std::move(index), this->rangeFrom(base.position())); + } + case Token::Kind::TK_DOT: { + std::string_view text; + if (this->identifier(&text)) { + Position pos = this->rangeFrom(base.position()); + return this->swizzle(pos, std::move(base), text, + this->rangeFrom(this->position(next).after())); + } + [[fallthrough]]; + } + case Token::Kind::TK_FLOAT_LITERAL: { + // Swizzles that start with a constant number, e.g. '.000r', will be tokenized as + // floating point literals, possibly followed by an identifier. Handle that here. + std::string_view field = this->text(next); + SkASSERT(field[0] == '.'); + field.remove_prefix(1); + // use the next *raw* token so we don't ignore whitespace - we only care about + // identifiers that directly follow the float + Position pos = this->rangeFrom(base.position()); + Position start = this->position(next); + // skip past the "." + start = Position::Range(start.startOffset() + 1, start.endOffset()); + Position maskPos = this->rangeFrom(start); + Token id = this->nextRawToken(); + if (id.fKind == Token::Kind::TK_IDENTIFIER) { + pos = this->rangeFrom(base.position()); + maskPos = this->rangeFrom(start); + return this->swizzle(pos, std::move(base), std::string(field) + + std::string(this->text(id)), maskPos); + } else if (field.empty()) { + this->error(pos, "expected field name or swizzle mask after '.'"); + return {{DSLExpression::Poison(pos)}}; + } + this->pushback(id); + return this->swizzle(pos, std::move(base), field, maskPos); + } + case Token::Kind::TK_LPAREN: { + ExpressionArray args; + if (this->peek().fKind != Token::Kind::TK_RPAREN) { + for (;;) { + DSLExpression expr = this->assignmentExpression(); + if (!expr.hasValue()) { + return {}; + } + args.push_back(expr.release()); + if (!this->checkNext(Token::Kind::TK_COMMA)) { + break; + } + } + } + this->expect(Token::Kind::TK_RPAREN, "')' to complete function arguments"); + Position pos = this->rangeFrom(base.position()); + return this->call(pos, std::move(base), std::move(args)); + } + case Token::Kind::TK_PLUSPLUS: + return base.postfix(Operator::Kind::PLUSPLUS, this->rangeFrom(base.position())); + case Token::Kind::TK_MINUSMINUS: + return base.postfix(Operator::Kind::MINUSMINUS, this->rangeFrom(base.position())); + default: { + this->error(next, "expected expression suffix, but found '" + + std::string(this->text(next)) + "'"); + return {}; + } + } +} + +/* IDENTIFIER | intLiteral | floatLiteral | boolLiteral | '(' expression ')' */ +DSLExpression Parser::term() { + Token t = this->peek(); + switch (t.fKind) { + case Token::Kind::TK_IDENTIFIER: { + std::string_view text; + if (this->identifier(&text)) { + Position pos = this->position(t); + return DSLExpression(fCompiler.convertIdentifier(pos, text), pos); + } + break; + } + case Token::Kind::TK_INT_LITERAL: { + SKSL_INT i; + if (!this->intLiteral(&i)) { + i = 0; + } + return DSLExpression(i, this->position(t)); + } + case Token::Kind::TK_FLOAT_LITERAL: { + SKSL_FLOAT f; + if (!this->floatLiteral(&f)) { + f = 0.0f; + } + return DSLExpression(f, this->position(t)); + } + case Token::Kind::TK_TRUE_LITERAL: // fall through + case Token::Kind::TK_FALSE_LITERAL: { + bool b; + SkAssertResult(this->boolLiteral(&b)); + return DSLExpression(b, this->position(t)); + } + case Token::Kind::TK_LPAREN: { + this->nextToken(); + AutoDepth depth(this); + if (!depth.increase()) { + return {}; + } + DSLExpression result = this->expression(); + if (result.hasValue()) { + this->expect(Token::Kind::TK_RPAREN, "')' to complete expression"); + result.setPosition(this->rangeFrom(this->position(t))); + return result; + } + break; + } + default: + this->nextToken(); + this->error(t, "expected expression, but found '" + std::string(this->text(t)) + "'"); + fEncounteredFatalError = true; + break; + } + return {}; +} + +/* INT_LITERAL */ +bool Parser::intLiteral(SKSL_INT* dest) { + Token t; + if (!this->expect(Token::Kind::TK_INT_LITERAL, "integer literal", &t)) { + return false; + } + std::string_view s = this->text(t); + if (!SkSL::stoi(s, dest)) { + this->error(t, "integer is too large: " + std::string(s)); + return false; + } + return true; +} + +/* FLOAT_LITERAL */ +bool Parser::floatLiteral(SKSL_FLOAT* dest) { + Token t; + if (!this->expect(Token::Kind::TK_FLOAT_LITERAL, "float literal", &t)) { + return false; + } + std::string_view s = this->text(t); + if (!SkSL::stod(s, dest)) { + this->error(t, "floating-point value is too large: " + std::string(s)); + return false; + } + return true; +} + +/* TRUE_LITERAL | FALSE_LITERAL */ +bool Parser::boolLiteral(bool* dest) { + Token t = this->nextToken(); + switch (t.fKind) { + case Token::Kind::TK_TRUE_LITERAL: + *dest = true; + return true; + case Token::Kind::TK_FALSE_LITERAL: + *dest = false; + return true; + default: + this->error(t, "expected 'true' or 'false', but found '" + + std::string(this->text(t)) + "'"); + return false; + } +} + +/* IDENTIFIER */ +bool Parser::identifier(std::string_view* dest) { + Token t; + if (this->expect(Token::Kind::TK_IDENTIFIER, "identifier", &t)) { + *dest = this->text(t); + return true; + } + return false; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLParser.h b/gfx/skia/skia/src/sksl/SkSLParser.h new file mode 100644 index 0000000000..74909f5e94 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLParser.h @@ -0,0 +1,369 @@ +/* + * Copyright 2021 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_PARSER +#define SKSL_PARSER + +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/DSLCore.h" +#include "include/sksl/DSLExpression.h" +#include "include/sksl/DSLLayout.h" +#include "include/sksl/DSLModifiers.h" +#include "include/sksl/DSLStatement.h" +#include "include/sksl/DSLType.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLOperator.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLLexer.h" +#include "src/sksl/SkSLProgramSettings.h" + +#include +#include +#include +#include +#include +#include + +namespace SkSL { + +class Compiler; +class SymbolTable; +enum class ProgramKind : int8_t; +struct Module; +struct Program; + +namespace dsl { +class DSLBlock; +class DSLCase; +class DSLGlobalVar; +class DSLParameter; +class DSLVarBase; +} + +/** + * Consumes .sksl text and invokes DSL functions to instantiate the program. + */ +class Parser { +public: + Parser(Compiler* compiler, const ProgramSettings& settings, ProgramKind kind, std::string text); + + std::unique_ptr program(); + + std::unique_ptr moduleInheritingFrom(const Module* parent); + + std::string_view text(Token token); + + Position position(Token token); + +private: + class AutoDepth; + class AutoSymbolTable; + + /** + * Return the next token, including whitespace tokens, from the parse stream. + */ + Token nextRawToken(); + + /** + * Return the next non-whitespace token from the parse stream. + */ + Token nextToken(); + + /** + * Push a token back onto the parse stream, so that it is the next one read. Only a single level + * of pushback is supported (that is, it is an error to call pushback() twice in a row without + * an intervening nextToken()). + */ + void pushback(Token t); + + /** + * Returns the next non-whitespace token without consuming it from the stream. + */ + Token peek(); + + /** + * Checks to see if the next token is of the specified type. If so, stores it in result (if + * result is non-null) and returns true. Otherwise, pushes it back and returns false. + */ + bool checkNext(Token::Kind kind, Token* result = nullptr); + + /** + * Behaves like checkNext(TK_IDENTIFIER), but also verifies that identifier is not a builtin + * type. If the token was actually a builtin type, false is returned (the next token is not + * considered to be an identifier). + */ + bool checkIdentifier(Token* result = nullptr); + + /** + * Reads the next non-whitespace token and generates an error if it is not the expected type. + * The 'expected' string is part of the error message, which reads: + * + * "expected , but found ''" + * + * If 'result' is non-null, it is set to point to the token that was read. + * Returns true if the read token was as expected, false otherwise. + */ + bool expect(Token::Kind kind, const char* expected, Token* result = nullptr); + bool expect(Token::Kind kind, std::string expected, Token* result = nullptr); + + /** + * Behaves like expect(TK_IDENTIFIER), but also verifies that identifier is not a type. + * If the token was actually a type, generates an error message of the form: + * + * "expected an identifier, but found type 'float2'" + */ + bool expectIdentifier(Token* result); + + /** If the next token is a newline, consumes it and returns true. If not, returns false. */ + bool expectNewline(); + + void error(Token token, std::string_view msg); + void error(Position position, std::string_view msg); + + // Returns the range from `start` to the current parse position. + Position rangeFrom(Position start); + Position rangeFrom(Token start); + + // these functions parse individual grammar rules from the current parse position; you probably + // don't need to call any of these outside of the parser. The function declarations in the .cpp + // file have comments describing the grammar rules. + + void declarations(); + + /** + * Parses an expression representing an array size. Reports errors if the array size is not + * valid (out of bounds, not a literal integer). Returns true if an expression was + * successfully parsed, even if that array size is not actually valid. In the event of a true + * return, outResult always contains a valid array size (even if the parsed array size was not + * actually valid; invalid array sizes result in a 1 to avoid additional errors downstream). + */ + bool arraySize(SKSL_INT* outResult); + + void directive(bool allowVersion); + + bool declaration(); + + bool functionDeclarationEnd(Position start, + dsl::DSLModifiers& modifiers, + dsl::DSLType type, + const Token& name); + + struct VarDeclarationsPrefix { + Position fPosition; + dsl::DSLModifiers fModifiers; + dsl::DSLType fType = dsl::DSLType(dsl::kVoid_Type); + Token fName; + }; + + bool varDeclarationsPrefix(VarDeclarationsPrefix* prefixData); + + dsl::DSLStatement varDeclarationsOrExpressionStatement(); + + dsl::DSLStatement varDeclarations(); + + dsl::DSLType structDeclaration(); + + SkTArray structVarDeclaration(Position start, + const dsl::DSLModifiers& modifiers); + + bool allowUnsizedArrays() { + return ProgramConfig::IsCompute(fKind) || ProgramConfig::IsFragment(fKind) || + ProgramConfig::IsVertex(fKind); + } + + bool parseArrayDimensions(Position pos, dsl::DSLType* type); + + bool parseInitializer(Position pos, dsl::DSLExpression* initializer); + + void globalVarDeclarationEnd(Position position, const dsl::DSLModifiers& mods, + dsl::DSLType baseType, Token name); + + dsl::DSLStatement localVarDeclarationEnd(Position position, const dsl::DSLModifiers& mods, + dsl::DSLType baseType, Token name); + + std::optional parameter(size_t paramIndex); + + int layoutInt(); + + std::string_view layoutIdentifier(); + + dsl::DSLLayout layout(); + + dsl::DSLModifiers modifiers(); + + dsl::DSLStatement statement(); + + dsl::DSLType type(dsl::DSLModifiers* modifiers); + + bool interfaceBlock(const dsl::DSLModifiers& mods); + + dsl::DSLStatement ifStatement(); + + dsl::DSLStatement doStatement(); + + dsl::DSLStatement whileStatement(); + + dsl::DSLStatement forStatement(); + + std::optional switchCase(); + + dsl::DSLStatement switchStatement(); + + dsl::DSLStatement returnStatement(); + + dsl::DSLStatement breakStatement(); + + dsl::DSLStatement continueStatement(); + + dsl::DSLStatement discardStatement(); + + std::optional block(); + + dsl::DSLStatement expressionStatement(); + + using BinaryParseFn = dsl::DSLExpression (Parser::*)(); + bool SK_WARN_UNUSED_RESULT operatorRight(AutoDepth& depth, Operator::Kind op, + BinaryParseFn rightFn, dsl::DSLExpression& result); + + dsl::DSLExpression expression(); + + dsl::DSLExpression assignmentExpression(); + + dsl::DSLExpression ternaryExpression(); + + dsl::DSLExpression logicalOrExpression(); + + dsl::DSLExpression logicalXorExpression(); + + dsl::DSLExpression logicalAndExpression(); + + dsl::DSLExpression bitwiseOrExpression(); + + dsl::DSLExpression bitwiseXorExpression(); + + dsl::DSLExpression bitwiseAndExpression(); + + dsl::DSLExpression equalityExpression(); + + dsl::DSLExpression relationalExpression(); + + dsl::DSLExpression shiftExpression(); + + dsl::DSLExpression additiveExpression(); + + dsl::DSLExpression multiplicativeExpression(); + + dsl::DSLExpression unaryExpression(); + + dsl::DSLExpression postfixExpression(); + + dsl::DSLExpression swizzle(Position pos, dsl::DSLExpression base, + std::string_view swizzleMask, Position maskPos); + + dsl::DSLExpression call(Position pos, dsl::DSLExpression base, ExpressionArray args); + + dsl::DSLExpression suffix(dsl::DSLExpression base); + + dsl::DSLExpression term(); + + bool intLiteral(SKSL_INT* dest); + + bool floatLiteral(SKSL_FLOAT* dest); + + bool boolLiteral(bool* dest); + + bool identifier(std::string_view* dest); + + std::shared_ptr& symbolTable(); + + void addToSymbolTable(dsl::DSLVarBase& var, Position pos = {}); + + class Checkpoint { + public: + Checkpoint(Parser* p) : fParser(p) { + fPushbackCheckpoint = fParser->fPushback; + fLexerCheckpoint = fParser->fLexer.getCheckpoint(); + fOldErrorReporter = &dsl::GetErrorReporter(); + fOldEncounteredFatalError = fParser->fEncounteredFatalError; + SkASSERT(fOldErrorReporter); + dsl::SetErrorReporter(&fErrorReporter); + } + + ~Checkpoint() { + SkASSERTF(!fOldErrorReporter, + "Checkpoint was not accepted or rewound before destruction"); + } + + void accept() { + this->restoreErrorReporter(); + // Parser errors should have been fatal, but we can encounter other errors like type + // mismatches despite accepting the parse. Forward those messages to the actual error + // handler now. + fErrorReporter.forwardErrors(); + } + + void rewind() { + this->restoreErrorReporter(); + fParser->fPushback = fPushbackCheckpoint; + fParser->fLexer.rewindToCheckpoint(fLexerCheckpoint); + fParser->fEncounteredFatalError = fOldEncounteredFatalError; + } + + private: + class ForwardingErrorReporter : public ErrorReporter { + public: + void handleError(std::string_view msg, Position pos) override { + fErrors.push_back({std::string(msg), pos}); + } + + void forwardErrors() { + for (Error& error : fErrors) { + dsl::GetErrorReporter().error(error.fPos, error.fMsg); + } + } + + private: + struct Error { + std::string fMsg; + Position fPos; + }; + + SkTArray fErrors; + }; + + void restoreErrorReporter() { + SkASSERT(fOldErrorReporter); + dsl::SetErrorReporter(fOldErrorReporter); + fOldErrorReporter = nullptr; + } + + Parser* fParser; + Token fPushbackCheckpoint; + SkSL::Lexer::Checkpoint fLexerCheckpoint; + ForwardingErrorReporter fErrorReporter; + ErrorReporter* fOldErrorReporter; + bool fOldEncounteredFatalError; + }; + + Compiler& fCompiler; + ProgramSettings fSettings; + ErrorReporter* fErrorReporter; + bool fEncounteredFatalError; + ProgramKind fKind; + std::unique_ptr fText; + Lexer fLexer; + // current parse depth, used to enforce a recursion limit to try to keep us from overflowing the + // stack on pathological inputs + int fDepth = 0; + Token fPushback; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLPool.cpp b/gfx/skia/skia/src/sksl/SkSLPool.cpp new file mode 100644 index 0000000000..5ef5d0065e --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLPool.cpp @@ -0,0 +1,97 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLPool.h" + +#include "include/core/SkTypes.h" + +#if defined(SK_GANESH) +// With GPU support, SkSL::MemoryPool is really GrMemoryPool +#include "src/gpu/ganesh/GrMemoryPool.h" +#endif + +#define VLOG(...) // printf(__VA_ARGS__) + +namespace SkSL { + +static thread_local MemoryPool* sMemPool = nullptr; + +static MemoryPool* get_thread_local_memory_pool() { + return sMemPool; +} + +static void set_thread_local_memory_pool(MemoryPool* memPool) { + sMemPool = memPool; +} + +Pool::~Pool() { + if (get_thread_local_memory_pool() == fMemPool.get()) { + SkDEBUGFAIL("SkSL pool is being destroyed while it is still attached to the thread"); + set_thread_local_memory_pool(nullptr); + } + + fMemPool->reportLeaks(); + SkASSERT(fMemPool->isEmpty()); + + VLOG("DELETE Pool:0x%016llX\n", (uint64_t)fMemPool.get()); +} + +std::unique_ptr Pool::Create() { + auto pool = std::unique_ptr(new Pool); + pool->fMemPool = MemoryPool::Make(/*preallocSize=*/65536, /*minAllocSize=*/32768); + VLOG("CREATE Pool:0x%016llX\n", (uint64_t)pool->fMemPool.get()); + return pool; +} + +bool Pool::IsAttached() { + return get_thread_local_memory_pool(); +} + +void Pool::attachToThread() { + VLOG("ATTACH Pool:0x%016llX\n", (uint64_t)fMemPool.get()); + SkASSERT(get_thread_local_memory_pool() == nullptr); + set_thread_local_memory_pool(fMemPool.get()); +} + +void Pool::detachFromThread() { + MemoryPool* memPool = get_thread_local_memory_pool(); + VLOG("DETACH Pool:0x%016llX\n", (uint64_t)memPool); + SkASSERT(memPool == fMemPool.get()); + memPool->resetScratchSpace(); + set_thread_local_memory_pool(nullptr); +} + +void* Pool::AllocMemory(size_t size) { + // Is a pool attached? + MemoryPool* memPool = get_thread_local_memory_pool(); + if (memPool) { + void* ptr = memPool->allocate(size); + VLOG("ALLOC Pool:0x%016llX 0x%016llX\n", (uint64_t)memPool, (uint64_t)ptr); + return ptr; + } + + // There's no pool attached. Allocate memory using the system allocator. + void* ptr = ::operator new(size); + VLOG("ALLOC Pool:__________________ 0x%016llX\n", (uint64_t)ptr); + return ptr; +} + +void Pool::FreeMemory(void* ptr) { + // Is a pool attached? + MemoryPool* memPool = get_thread_local_memory_pool(); + if (memPool) { + VLOG("FREE Pool:0x%016llX 0x%016llX\n", (uint64_t)memPool, (uint64_t)ptr); + memPool->release(ptr); + return; + } + + // There's no pool attached. Free it using the system allocator. + VLOG("FREE Pool:__________________ 0x%016llX\n", (uint64_t)ptr); + ::operator delete(ptr); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLPool.h b/gfx/skia/skia/src/sksl/SkSLPool.h new file mode 100644 index 0000000000..9e64d44b9a --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLPool.h @@ -0,0 +1,96 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_POOL +#define SKSL_POOL + +#include "src/sksl/SkSLMemoryPool.h" + +#include +#include + +namespace SkSL { + +/** + * Efficiently allocates memory in an SkSL program. Optimized for allocate/release performance over + * memory efficiency. + * + * All allocated memory must be released back to the pool before it can be destroyed or recycled. + */ + +class Pool { +public: + ~Pool(); + + // Creates a pool to store objects during program creation. Call attachToThread() to start using + // the pool for its allocations. When your program is complete, call pool->detachFromThread() to + // take ownership of the pool and its allocations. Before freeing any of the program's + // allocations, make sure to reattach the pool by calling pool->attachToThread() again. + static std::unique_ptr Create(); + + // Attaches a pool to the current thread. + // It is an error to call this while a pool is already attached. + void attachToThread(); + + // Once you are done creating or destroying objects in the pool, detach it from the thread. + // It is an error to call this while no pool is attached. + void detachFromThread(); + + // Allocates memory from the thread pool. If the pool is exhausted, an additional block of pool + // storage will be created to hold the data. + static void* AllocMemory(size_t size); + + // Releases memory that was created by AllocMemory. All objects in the pool must be freed before + // the pool can be destroyed. + static void FreeMemory(void* ptr); + + static bool IsAttached(); + +private: + Pool() = default; // use Create to make a pool + std::unique_ptr fMemPool; +}; + +/** + * If your class inherits from Poolable, its objects will be allocated from the pool. + */ +class Poolable { +public: + // Override operator new and delete to allow us to use a memory pool. + static void* operator new(const size_t size) { + return Pool::AllocMemory(size); + } + + static void operator delete(void* ptr) { + Pool::FreeMemory(ptr); + } +}; + +/** + * Temporarily attaches a pool to the current thread within a scope. + */ +class AutoAttachPoolToThread { +public: + AutoAttachPoolToThread(Pool* p) : fPool(p) { + if (fPool) { + fPool->attachToThread(); + } + } + ~AutoAttachPoolToThread() { + if (fPool) { + fPool->detachFromThread(); + } + } + +private: + Pool* fPool = nullptr; +}; + + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLPosition.cpp b/gfx/skia/skia/src/sksl/SkSLPosition.cpp new file mode 100644 index 0000000000..494accaf7b --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLPosition.cpp @@ -0,0 +1,34 @@ +/* + * Copyright 2022 Google LLC. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/sksl/SkSLPosition.h" + +#include + +namespace SkSL { + +int Position::line(std::string_view source) const { + SkASSERT(this->valid()); + if (fStartOffset == -1) { + return -1; + } + if (!source.data()) { + return -1; + } + // we allow the offset to equal the length, because that's where TK_END_OF_FILE is reported + SkASSERT(fStartOffset <= (int)source.length()); + int offset = std::min(fStartOffset, (int)source.length()); + int line = 1; + for (int i = 0; i < offset; i++) { + if (source[i] == '\n') { + ++line; + } + } + return line; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLProgramSettings.h b/gfx/skia/skia/src/sksl/SkSLProgramSettings.h new file mode 100644 index 0000000000..48622bb0c3 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLProgramSettings.h @@ -0,0 +1,160 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_PROGRAMSETTINGS +#define SKSL_PROGRAMSETTINGS + +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLProgramKind.h" +#include "include/sksl/SkSLVersion.h" + +#include + +namespace SkSL { + +/** + * Holds the compiler settings for a program. + */ +struct ProgramSettings { + // If true, the destination fragment color can be read from sk_FragColor. It must be declared + // inout. This is only supported in GLSL, when framebuffer-fetch is used. + bool fFragColorIsInOut = false; + // if true, all halfs are forced to be floats + bool fForceHighPrecision = false; + // if true, add -0.5 bias to LOD of all texture lookups + bool fSharpenTextures = false; + // If true, sk_FragCoord, the dFdy gradient, and sk_Clockwise won't be modified by the + // rtFlip. Additionally, the 'fUseFlipRTUniform' boolean will be forced to false so no rtFlip + // uniform will be emitted. + bool fForceNoRTFlip = false; + // if the program needs to create an RTFlip uniform, this is its offset in the uniform buffer + int fRTFlipOffset = -1; + // if the program needs to create an RTFlip uniform and is creating SPIR-V, this is the binding + // and set number of the uniform buffer. + int fRTFlipBinding = -1; + int fRTFlipSet = -1; + // If layout(set=S, binding=B) is not specified for a uniform, these values will be used. + // At present, zero is always used by our backends. + int fDefaultUniformSet = 0; + int fDefaultUniformBinding = 0; + // Enables the SkSL optimizer. Note that we never disable optimizations which are needed to + // fully evaluate constant-expressions, like constant folding or constant-intrinsic evaluation. + bool fOptimize = true; + // (Requires fOptimize = true) Removes any uncalled functions other than main(). Note that a + // function which starts out being used may end up being uncalled after optimization. + bool fRemoveDeadFunctions = true; + // (Requires fOptimize = true) Removes variables which are never used. + bool fRemoveDeadVariables = true; + // (Requires fOptimize = true) When greater than zero, enables the inliner. The threshold value + // sets an upper limit on the acceptable amount of code growth from inlining. + int fInlineThreshold = SkSL::kDefaultInlineThreshold; + // If true, every function in the generated program will be given the `noinline` modifier. + bool fForceNoInline = false; + // If true, implicit conversions to lower precision numeric types are allowed (e.g., float to + // half). These are always allowed when compiling Runtime Effects. + bool fAllowNarrowingConversions = false; + // If true, then Debug code will run SPIR-V output through the validator to ensure its + // correctness + bool fValidateSPIRV = true; + // If true, any synthetic uniforms must use push constant syntax + bool fUsePushConstants = false; + // TODO(skia:11209) - Replace this with a "promised" capabilities? + // Sets a maximum SkSL version. Compilation will fail if the program uses features that aren't + // allowed at the requested version. For instance, a valid program must have fully-unrollable + // `for` loops at version 100, but any loop structure is allowed at version 300. + SkSL::Version fMaxVersionAllowed = SkSL::Version::k100; + // If true, SkVM debug traces will contain the `trace_var` opcode. This opcode can cause the + // generated code to contain a lot of extra computations, because we need to explicitly compute + // every temporary value, even ones that would otherwise be optimized away entirely. The other + // debug opcodes are much less invasive on the generated code. + bool fAllowTraceVarInSkVMDebugTrace = true; + // If true, SkSL will use a memory pool for all IR nodes when compiling a program. This is + // usually a significant speed increase, but uses more memory, so it is a good idea for programs + // that will be freed shortly after compilation. It can also be useful to disable this flag when + // investigating memory corruption. (This controls behavior of the SkSL compiler, not the code + // we generate.) + bool fUseMemoryPool = true; + // If true, VarDeclaration can be cloned for testing purposes. See VarDeclaration::clone for + // more information. + bool fAllowVarDeclarationCloneForTesting = false; + // If true, SPIR-V codegen restricted to a subset supported by Dawn. + // TODO(skia:13840, skia:14023): Remove this setting when Skia can use WGSL on Dawn. + bool fSPIRVDawnCompatMode = false; +}; + +/** + * All the configuration data for a given program. + */ +struct ProgramConfig { + /** True if we are currently processing one of the built-in SkSL include modules. */ + bool fIsBuiltinCode; + ProgramKind fKind; + ProgramSettings fSettings; + + // When enforcesSkSLVersion() is true, this determines the available feature set that will be + // enforced. This is set automatically when the `#version` directive is parsed. + SkSL::Version fRequiredSkSLVersion = SkSL::Version::k100; + + bool enforcesSkSLVersion() const { + return IsRuntimeEffect(fKind); + } + + bool strictES2Mode() const { + // TODO(skia:11209): Remove the first condition - so this is just based on #version. + // Make it more generic (eg, isVersionLT) checking. + return fSettings.fMaxVersionAllowed == Version::k100 && + fRequiredSkSLVersion == Version::k100 && + this->enforcesSkSLVersion(); + } + + const char* versionDescription() const { + if (this->enforcesSkSLVersion()) { + switch (fRequiredSkSLVersion) { + case Version::k100: return "#version 100\n"; + case Version::k300: return "#version 300\n"; + } + } + return ""; + } + + static bool IsFragment(ProgramKind kind) { + return kind == ProgramKind::kFragment || + kind == ProgramKind::kGraphiteFragment; + } + + static bool IsVertex(ProgramKind kind) { + return kind == ProgramKind::kVertex || + kind == ProgramKind::kGraphiteVertex; + } + + static bool IsCompute(ProgramKind kind) { + return kind == ProgramKind::kCompute; + } + + static bool IsRuntimeEffect(ProgramKind kind) { + return (kind == ProgramKind::kRuntimeColorFilter || + kind == ProgramKind::kRuntimeShader || + kind == ProgramKind::kRuntimeBlender || + kind == ProgramKind::kPrivateRuntimeColorFilter || + kind == ProgramKind::kPrivateRuntimeShader || + kind == ProgramKind::kPrivateRuntimeBlender || + kind == ProgramKind::kMeshVertex || + kind == ProgramKind::kMeshFragment); + } + + static bool AllowsPrivateIdentifiers(ProgramKind kind) { + return (kind != ProgramKind::kRuntimeColorFilter && + kind != ProgramKind::kRuntimeShader && + kind != ProgramKind::kRuntimeBlender && + kind != ProgramKind::kMeshVertex && + kind != ProgramKind::kMeshFragment); + } +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLSampleUsage.cpp b/gfx/skia/skia/src/sksl/SkSLSampleUsage.cpp new file mode 100644 index 0000000000..9b908b35e8 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLSampleUsage.cpp @@ -0,0 +1,26 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkSLSampleUsage.h" + +#include + +namespace SkSL { + +SampleUsage SampleUsage::merge(const SampleUsage& other) { + // This function is only used in Analysis::MergeSampleUsageVisitor to determine the combined + // SampleUsage for a child fp/shader/etc. We should never see matrix sampling here. + SkASSERT(fKind != Kind::kUniformMatrix && other.fKind != Kind::kUniformMatrix); + + static_assert(Kind::kExplicit > Kind::kPassThrough); + static_assert(Kind::kPassThrough > Kind::kNone); + fKind = std::max(fKind, other.fKind); + + return *this; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLString.cpp b/gfx/skia/skia/src/sksl/SkSLString.cpp new file mode 100644 index 0000000000..c746ff2823 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLString.cpp @@ -0,0 +1,115 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLString.h" +#include "include/private/base/SkAssert.h" +#include "src/base/SkStringView.h" + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +template +static std::string to_string_impl(RoundtripType value) { + std::stringstream buffer; + buffer.imbue(std::locale::classic()); + buffer.precision(7); + buffer << value; + std::string text = buffer.str(); + + double roundtripped; + buffer >> roundtripped; + if (value != (RoundtripType)roundtripped && std::isfinite(value)) { + buffer.str({}); + buffer.clear(); + buffer.precision(kFullPrecision); + buffer << value; + text = buffer.str(); + SkASSERTF((buffer >> roundtripped, value == (RoundtripType)roundtripped), + "%.17g -> %s -> %.17g", value, text.c_str(), roundtripped); + } + + // We need to emit a decimal point to distinguish floats from ints. + if (!skstd::contains(text, '.') && !skstd::contains(text, 'e')) { + text += ".0"; + } + + return text; +} + +std::string skstd::to_string(float value) { + return to_string_impl(value); +} + +std::string skstd::to_string(double value) { + return to_string_impl(value); +} + +bool SkSL::stod(std::string_view s, SKSL_FLOAT* value) { + std::string str(s.data(), s.size()); + std::stringstream buffer(str); + buffer.imbue(std::locale::classic()); + buffer >> *value; + return !buffer.fail() && std::isfinite(*value); +} + +bool SkSL::stoi(std::string_view s, SKSL_INT* value) { + if (s.empty()) { + return false; + } + char suffix = s.back(); + if (suffix == 'u' || suffix == 'U') { + s.remove_suffix(1); + } + std::string str(s); // s is not null-terminated + const char* strEnd = str.data() + str.length(); + char* p; + errno = 0; + unsigned long long result = strtoull(str.data(), &p, /*base=*/0); + *value = static_cast(result); + return p == strEnd && errno == 0 && result <= 0xFFFFFFFF; +} + +std::string SkSL::String::printf(const char* fmt, ...) { + va_list args; + va_start(args, fmt); + std::string result; + vappendf(&result, fmt, args); + va_end(args); + return result; +} + +void SkSL::String::appendf(std::string *str, const char* fmt, ...) { + va_list args; + va_start(args, fmt); + vappendf(str, fmt, args); + va_end(args); +} + +void SkSL::String::vappendf(std::string *str, const char* fmt, va_list args) { + #define BUFFER_SIZE 256 + char buffer[BUFFER_SIZE]; + va_list reuse; + va_copy(reuse, args); + size_t size = vsnprintf(buffer, BUFFER_SIZE, fmt, args); + if (BUFFER_SIZE >= size + 1) { + str->append(buffer, size); + } else { + auto newBuffer = std::unique_ptr(new char[size + 1]); + vsnprintf(newBuffer.get(), size + 1, fmt, reuse); + str->append(newBuffer.get(), size); + } + va_end(reuse); +} diff --git a/gfx/skia/skia/src/sksl/SkSLStringStream.h b/gfx/skia/skia/src/sksl/SkSLStringStream.h new file mode 100644 index 0000000000..aabda3894e --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLStringStream.h @@ -0,0 +1,58 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_STRINGSTREAM +#define SKSL_STRINGSTREAM + +#include "include/core/SkData.h" +#include "include/core/SkStream.h" +#include "src/sksl/SkSLOutputStream.h" + +namespace SkSL { + +class StringStream : public OutputStream { +public: + void write8(uint8_t b) override { + SkASSERT(fString.empty()); + fStream.write8(b); + } + + void writeText(const char* s) override { + SkASSERT(fString.empty()); + fStream.writeText(s); + } + + void write(const void* s, size_t size) override { + SkASSERT(fString.empty()); + fStream.write(s, size); + } + + size_t bytesWritten() const { + return fStream.bytesWritten(); + } + + const std::string& str() const { + if (!fString.size()) { + sk_sp data = fStream.detachAsData(); + fString = std::string((const char*) data->data(), data->size()); + } + return fString; + } + + void reset() { + fStream.reset(); + fString = ""; + } + +private: + mutable SkDynamicMemoryWStream fStream; + mutable std::string fString; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLThreadContext.cpp b/gfx/skia/skia/src/sksl/SkSLThreadContext.cpp new file mode 100644 index 0000000000..58d9b40d83 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLThreadContext.cpp @@ -0,0 +1,126 @@ +/* + * Copyright 2020 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLThreadContext.h" + +#include "include/private/SkSLProgramElement.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLModifiersPool.h" +#include "src/sksl/SkSLPool.h" +#include "src/sksl/ir/SkSLSymbolTable.h" + +#include + +namespace SkSL { + +ThreadContext::ThreadContext(SkSL::Compiler* compiler, + SkSL::ProgramKind kind, + const SkSL::ProgramSettings& settings, + const SkSL::Module* module, + bool isModule) + : fCompiler(compiler) + , fOldConfig(fCompiler->fContext->fConfig) + , fOldModifiersPool(fCompiler->fContext->fModifiersPool) + , fOldErrorReporter(*fCompiler->fContext->fErrors) + , fSettings(settings) { + if (!isModule) { + if (settings.fUseMemoryPool) { + fPool = Pool::Create(); + fPool->attachToThread(); + } + fModifiersPool = std::make_unique(); + fCompiler->fContext->fModifiersPool = fModifiersPool.get(); + } + + fConfig = std::make_unique(); + fConfig->fKind = kind; + fConfig->fSettings = settings; + fConfig->fIsBuiltinCode = isModule; + fCompiler->fContext->fConfig = fConfig.get(); + fCompiler->fContext->fErrors = &fDefaultErrorReporter; + fCompiler->fContext->fModule = module; + fCompiler->fSymbolTable = module->fSymbols; + this->setupSymbolTable(); +} + +ThreadContext::~ThreadContext() { + if (SymbolTable()) { + fCompiler->fSymbolTable = nullptr; + fProgramElements.clear(); + } else { + // We should only be here with a null symbol table if ReleaseProgram was called + SkASSERT(fProgramElements.empty()); + } + fCompiler->fContext->fErrors = &fOldErrorReporter; + fCompiler->fContext->fConfig = fOldConfig; + fCompiler->fContext->fModifiersPool = fOldModifiersPool; + if (fPool) { + fPool->detachFromThread(); + } +} + +void ThreadContext::setupSymbolTable() { + SkSL::Context& context = *fCompiler->fContext; + SymbolTable::Push(&fCompiler->fSymbolTable, context.fConfig->fIsBuiltinCode); + + SkSL::SymbolTable& symbolTable = *fCompiler->fSymbolTable; + symbolTable.markModuleBoundary(); +} + +SkSL::Context& ThreadContext::Context() { + return Compiler().context(); +} + +const SkSL::ProgramSettings& ThreadContext::Settings() { + return Context().fConfig->fSettings; +} + +std::shared_ptr& ThreadContext::SymbolTable() { + return Compiler().fSymbolTable; +} + +const SkSL::Modifiers* ThreadContext::Modifiers(const SkSL::Modifiers& modifiers) { + return Context().fModifiersPool->add(modifiers); +} + +ThreadContext::RTAdjustData& ThreadContext::RTAdjustState() { + return Instance().fRTAdjust; +} + +void ThreadContext::SetErrorReporter(ErrorReporter* errorReporter) { + SkASSERT(errorReporter); + Context().fErrors = errorReporter; +} + +void ThreadContext::ReportError(std::string_view msg, Position pos) { + GetErrorReporter().error(pos, msg); +} + +void ThreadContext::DefaultErrorReporter::handleError(std::string_view msg, Position pos) { + SK_ABORT("error: %.*s\nNo SkSL error reporter configured, treating this as a fatal error\n", + (int)msg.length(), msg.data()); +} + +thread_local ThreadContext* instance = nullptr; + +bool ThreadContext::IsActive() { + return instance != nullptr; +} + +ThreadContext& ThreadContext::Instance() { + SkASSERTF(instance, "dsl::Start() has not been called"); + return *instance; +} + +void ThreadContext::SetInstance(std::unique_ptr newInstance) { + SkASSERT((instance == nullptr) != (newInstance == nullptr)); + delete instance; + instance = newInstance.release(); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLThreadContext.h b/gfx/skia/skia/src/sksl/SkSLThreadContext.h new file mode 100644 index 0000000000..853ec4ed98 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLThreadContext.h @@ -0,0 +1,177 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_THREADCONTEXT +#define SKSL_THREADCONTEXT + +#include "include/core/SkTypes.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/ir/SkSLProgram.h" + +#include +#include +#include +#include + +namespace SkSL { + +class Compiler; +class ModifiersPool; +class Pool; +class ProgramElement; +class SymbolTable; +class Variable; +enum class ProgramKind : int8_t; +struct Modifiers; +struct Module; + +namespace dsl { + +class DSLCore; + +} // namespace dsl + +/** + * Thread-safe class that tracks per-thread state associated with SkSL output. + */ +class ThreadContext { +public: + ThreadContext(SkSL::Compiler* compiler, + SkSL::ProgramKind kind, + const SkSL::ProgramSettings& settings, + const SkSL::Module* module, + bool isModule); + ~ThreadContext(); + + /** + * Returns true if the DSL has been started. + */ + static bool IsActive(); + + /** + * Returns the Compiler used by DSL operations in the current thread. + */ + static SkSL::Compiler& Compiler() { return *Instance().fCompiler; } + + /** + * Returns the Context used by DSL operations in the current thread. + */ + static SkSL::Context& Context(); + + /** + * Returns the Settings used by DSL operations in the current thread. + */ + static const SkSL::ProgramSettings& Settings(); + + /** + * Returns the Program::Inputs used by the current thread. + */ + static SkSL::Program::Inputs& Inputs() { return Instance().fInputs; } + + /** + * Returns the collection to which DSL program elements in this thread should be appended. + */ + static std::vector>& ProgramElements() { + return Instance().fProgramElements; + } + + static std::vector& SharedElements() { + return Instance().fSharedElements; + } + + /** + * Returns the current SymbolTable. + */ + static std::shared_ptr& SymbolTable(); + + /** + * Returns the current memory pool. + */ + static std::unique_ptr& MemoryPool() { return Instance().fPool; } + + /** + * Returns the current modifiers pool. + */ + static std::unique_ptr& GetModifiersPool() { return Instance().fModifiersPool; } + + /** + * Returns the current ProgramConfig. + */ + static const std::unique_ptr& GetProgramConfig() { return Instance().fConfig; } + + static bool IsModule() { return GetProgramConfig()->fIsBuiltinCode; } + + /** + * Returns the final pointer to a pooled Modifiers object that should be used to represent the + * given modifiers. + */ + static const SkSL::Modifiers* Modifiers(const SkSL::Modifiers& modifiers); + + struct RTAdjustData { + // Points to a standalone sk_RTAdjust variable, if one exists. + const Variable* fVar = nullptr; + // Points to the interface block containing an sk_RTAdjust field, if one exists. + const Variable* fInterfaceBlock = nullptr; + // If fInterfaceBlock is non-null, contains the index of the sk_RTAdjust field within it. + int fFieldIndex = -1; + }; + + /** + * Returns a struct containing information about the RTAdjust variable. + */ + static RTAdjustData& RTAdjustState(); + + /** + * Returns the ErrorReporter associated with the current thread. This object will be notified + * when any DSL errors occur. + */ + static ErrorReporter& GetErrorReporter() { + return *Context().fErrors; + } + + static void SetErrorReporter(ErrorReporter* errorReporter); + + /** + * Notifies the current ErrorReporter that an error has occurred. The default error handler + * prints the message to stderr and aborts. + */ + static void ReportError(std::string_view msg, Position pos = Position{}); + + static ThreadContext& Instance(); + + static void SetInstance(std::unique_ptr instance); + +private: + class DefaultErrorReporter : public ErrorReporter { + void handleError(std::string_view msg, Position pos) override; + }; + + void setupSymbolTable(); + + std::unique_ptr fConfig; + std::unique_ptr fModifiersPool; + SkSL::Compiler* fCompiler; + std::unique_ptr fPool; + SkSL::ProgramConfig* fOldConfig; + SkSL::ModifiersPool* fOldModifiersPool; + std::vector> fProgramElements; + std::vector fSharedElements; + DefaultErrorReporter fDefaultErrorReporter; + ErrorReporter& fOldErrorReporter; + ProgramSettings fSettings; + RTAdjustData fRTAdjust; + Program::Inputs fInputs; + + friend class dsl::DSLCore; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/SkSLUtil.cpp b/gfx/skia/skia/src/sksl/SkSLUtil.cpp new file mode 100644 index 0000000000..8efeb21790 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLUtil.cpp @@ -0,0 +1,89 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLUtil.h" + +#include "src/core/SkSLTypeShared.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLOutputStream.h" +#include "src/sksl/SkSLStringStream.h" +#include "src/sksl/ir/SkSLType.h" + +#include + +namespace SkSL { + +// TODO: Once Graphite has its own GPU-caps system, SK_GRAPHITE should get its own mode. +// At the moment, it either mimics what GrShaderCaps reports, or it uses these hard-coded values +// depending on the build. +#if defined(SKSL_STANDALONE) || !defined(SK_GANESH) +std::unique_ptr ShaderCapsFactory::MakeShaderCaps() { + std::unique_ptr standalone = std::make_unique(); + standalone->fShaderDerivativeSupport = true; + standalone->fExplicitTextureLodSupport = true; + standalone->fFlatInterpolationSupport = true; + standalone->fNoPerspectiveInterpolationSupport = true; + standalone->fSampleMaskSupport = true; + standalone->fExternalTextureSupport = true; + return standalone; +} +#else +std::unique_ptr ShaderCapsFactory::MakeShaderCaps() { + return std::make_unique(); +} +#endif // defined(SKSL_STANDALONE) || !defined(SK_GANESH) + +void write_stringstream(const StringStream& s, OutputStream& out) { + out.write(s.str().c_str(), s.str().size()); +} + +#if !defined(SKSL_STANDALONE) && (defined(SK_GANESH) || SK_SUPPORT_GRAPHITE) +bool type_to_sksltype(const Context& context, const Type& type, SkSLType* outType) { + // If a new GrSL type is added, this function will need to be updated. + static_assert(kSkSLTypeCount == 41); + + if (type.matches(*context.fTypes.fVoid )) { *outType = SkSLType::kVoid; return true; } + if (type.matches(*context.fTypes.fBool )) { *outType = SkSLType::kBool; return true; } + if (type.matches(*context.fTypes.fBool2 )) { *outType = SkSLType::kBool2; return true; } + if (type.matches(*context.fTypes.fBool3 )) { *outType = SkSLType::kBool3; return true; } + if (type.matches(*context.fTypes.fBool4 )) { *outType = SkSLType::kBool4; return true; } + if (type.matches(*context.fTypes.fShort )) { *outType = SkSLType::kShort; return true; } + if (type.matches(*context.fTypes.fShort2 )) { *outType = SkSLType::kShort2; return true; } + if (type.matches(*context.fTypes.fShort3 )) { *outType = SkSLType::kShort3; return true; } + if (type.matches(*context.fTypes.fShort4 )) { *outType = SkSLType::kShort4; return true; } + if (type.matches(*context.fTypes.fUShort )) { *outType = SkSLType::kUShort; return true; } + if (type.matches(*context.fTypes.fUShort2 )) { *outType = SkSLType::kUShort2; return true; } + if (type.matches(*context.fTypes.fUShort3 )) { *outType = SkSLType::kUShort3; return true; } + if (type.matches(*context.fTypes.fUShort4 )) { *outType = SkSLType::kUShort4; return true; } + if (type.matches(*context.fTypes.fFloat )) { *outType = SkSLType::kFloat; return true; } + if (type.matches(*context.fTypes.fFloat2 )) { *outType = SkSLType::kFloat2; return true; } + if (type.matches(*context.fTypes.fFloat3 )) { *outType = SkSLType::kFloat3; return true; } + if (type.matches(*context.fTypes.fFloat4 )) { *outType = SkSLType::kFloat4; return true; } + if (type.matches(*context.fTypes.fFloat2x2)) { *outType = SkSLType::kFloat2x2; return true; } + if (type.matches(*context.fTypes.fFloat3x3)) { *outType = SkSLType::kFloat3x3; return true; } + if (type.matches(*context.fTypes.fFloat4x4)) { *outType = SkSLType::kFloat4x4; return true; } + if (type.matches(*context.fTypes.fHalf )) { *outType = SkSLType::kHalf; return true; } + if (type.matches(*context.fTypes.fHalf2 )) { *outType = SkSLType::kHalf2; return true; } + if (type.matches(*context.fTypes.fHalf3 )) { *outType = SkSLType::kHalf3; return true; } + if (type.matches(*context.fTypes.fHalf4 )) { *outType = SkSLType::kHalf4; return true; } + if (type.matches(*context.fTypes.fHalf2x2 )) { *outType = SkSLType::kHalf2x2; return true; } + if (type.matches(*context.fTypes.fHalf3x3 )) { *outType = SkSLType::kHalf3x3; return true; } + if (type.matches(*context.fTypes.fHalf4x4 )) { *outType = SkSLType::kHalf4x4; return true; } + if (type.matches(*context.fTypes.fInt )) { *outType = SkSLType::kInt; return true; } + if (type.matches(*context.fTypes.fInt2 )) { *outType = SkSLType::kInt2; return true; } + if (type.matches(*context.fTypes.fInt3 )) { *outType = SkSLType::kInt3; return true; } + if (type.matches(*context.fTypes.fInt4 )) { *outType = SkSLType::kInt4; return true; } + if (type.matches(*context.fTypes.fUInt )) { *outType = SkSLType::kUInt; return true; } + if (type.matches(*context.fTypes.fUInt2 )) { *outType = SkSLType::kUInt2; return true; } + if (type.matches(*context.fTypes.fUInt3 )) { *outType = SkSLType::kUInt3; return true; } + if (type.matches(*context.fTypes.fUInt4 )) { *outType = SkSLType::kUInt4; return true; } + return false; +} +#endif + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/SkSLUtil.h b/gfx/skia/skia/src/sksl/SkSLUtil.h new file mode 100644 index 0000000000..92dfe537a9 --- /dev/null +++ b/gfx/skia/skia/src/sksl/SkSLUtil.h @@ -0,0 +1,187 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_UTIL +#define SKSL_UTIL + +#include "include/core/SkTypes.h" +#include "include/sksl/SkSLVersion.h" +#include "src/sksl/SkSLGLSL.h" + +#include + +enum class SkSLType : char; + +namespace SkSL { + +class Context; +class OutputStream; +class StringStream; +class Type; + +struct ShaderCaps { + /** + * Indicates how GLSL must interact with advanced blend equations. The KHR extension requires + * special layout qualifiers in the fragment shader. + */ + enum AdvBlendEqInteraction { + kNotSupported_AdvBlendEqInteraction, //= kGeneralEnable_AdvBlendEqInteraction; + } + + bool mustDeclareFragmentShaderOutput() const { + return fGLSLGeneration > SkSL::GLSLGeneration::k110; + } + + // Returns the string of an extension that must be enabled in the shader to support + // derivatives. If nullptr is returned then no extension needs to be enabled. Before calling + // this function, the caller should check that shaderDerivativeSupport exists. + const char* shaderDerivativeExtensionString() const { + SkASSERT(this->fShaderDerivativeSupport); + return fShaderDerivativeExtensionString; + } + + // This returns the name of an extension that must be enabled in the shader to support external + // textures. In some cases, two extensions must be enabled - the second extension is returned + // by secondExternalTextureExtensionString(). If that function returns nullptr, then only one + // extension is required. + const char* externalTextureExtensionString() const { + SkASSERT(this->fExternalTextureSupport); + return fExternalTextureExtensionString; + } + + const char* secondExternalTextureExtensionString() const { + SkASSERT(this->fExternalTextureSupport); + return fSecondExternalTextureExtensionString; + } + + /** + * SkSL 300 requires support for derivatives, nonsquare matrices and bitwise integer operations. + */ + SkSL::Version supportedSkSLVerion() const { + if (fShaderDerivativeSupport && fNonsquareMatrixSupport && fIntegerSupport && + fGLSLGeneration >= SkSL::GLSLGeneration::k330) { + return SkSL::Version::k300; + } + return SkSL::Version::k100; + } + + bool supportsDistanceFieldText() const { return fShaderDerivativeSupport; } + + SkSL::GLSLGeneration fGLSLGeneration = SkSL::GLSLGeneration::k330; + + bool fShaderDerivativeSupport = false; + /** Enables sampleGrad and sampleLod functions that don't rely on implicit derivatives */ + bool fExplicitTextureLodSupport = false; + /** Indicates true 32-bit integer support, with unsigned types and bitwise operations */ + bool fIntegerSupport = false; + bool fNonsquareMatrixSupport = false; + /** asinh(), acosh(), atanh() */ + bool fInverseHyperbolicSupport = false; + bool fFBFetchSupport = false; + bool fFBFetchNeedsCustomOutput = false; + bool fUsesPrecisionModifiers = false; + bool fFlatInterpolationSupport = false; + bool fNoPerspectiveInterpolationSupport = false; + bool fSampleMaskSupport = false; + bool fExternalTextureSupport = false; + bool fFloatIs32Bits = true; + + // isinf() is defined, and floating point infinities are handled according to IEEE standards. + bool fInfinitySupport = false; + + // Used by SkSL to know when to generate polyfills. + bool fBuiltinFMASupport = true; + bool fBuiltinDeterminantSupport = true; + + // Used for specific driver bug work arounds + bool fCanUseMinAndAbsTogether = true; + bool fCanUseFractForNegativeValues = true; + bool fMustForceNegatedAtanParamToFloat = false; + bool fMustForceNegatedLdexpParamToMultiply = false; // http://skbug.com/12076 + // Returns whether a device incorrectly implements atan(y,x) as atan(y/x) + bool fAtan2ImplementedAsAtanYOverX = false; + // If this returns true some operation (could be a no op) must be called between floor and abs + // to make sure the driver compiler doesn't inline them together which can cause a driver bug in + // the shader. + bool fMustDoOpBetweenFloorAndAbs = false; + // The D3D shader compiler, when targeting PS 3.0 (ie within ANGLE) fails to compile certain + // constructs. See detailed comments in GrGLCaps.cpp. + bool fMustGuardDivisionEvenAfterExplicitZeroCheck = false; + // If false, SkSL uses a workaround so that sk_FragCoord doesn't actually query gl_FragCoord + bool fCanUseFragCoord = true; + // If true, short ints can't represent every integer in the 16-bit two's complement range as + // required by the spec. SKSL will always emit full ints. + bool fIncompleteShortIntPrecision = false; + // If true, then conditions in for loops need "&& true" to work around driver bugs. + bool fAddAndTrueToLoopCondition = false; + // If true, then expressions such as "x && y" or "x || y" are rewritten as ternary to work + // around driver bugs. + bool fUnfoldShortCircuitAsTernary = false; + bool fEmulateAbsIntFunction = false; + bool fRewriteDoWhileLoops = false; + bool fRewriteSwitchStatements = false; + bool fRemovePowWithConstantExponent = false; + // The Android emulator claims samplerExternalOES is an unknown type if a default precision + // statement is made for the type. + bool fNoDefaultPrecisionForExternalSamplers = false; + // ARM GPUs calculate `matrix * vector` in SPIR-V at full precision, even when the inputs are + // RelaxedPrecision. Rewriting the multiply as a sum of vector*scalar fixes this. (skia:11769) + bool fRewriteMatrixVectorMultiply = false; + // Rewrites matrix equality comparisons to avoid an Adreno driver bug. (skia:11308) + bool fRewriteMatrixComparisons = false; + // Strips const from function parameters in the GLSL code generator. (skia:13858) + bool fRemoveConstFromFunctionParameters = false; + + const char* fVersionDeclString = ""; + + const char* fShaderDerivativeExtensionString = nullptr; + const char* fExternalTextureExtensionString = nullptr; + const char* fSecondExternalTextureExtensionString = nullptr; + const char* fFBFetchColorName = nullptr; + + AdvBlendEqInteraction fAdvBlendEqInteraction = kNotSupported_AdvBlendEqInteraction; +}; + +// Various sets of caps for use in tests +class ShaderCapsFactory { +public: + static const ShaderCaps* Default() { + static const SkSL::ShaderCaps* sCaps = [] { + std::unique_ptr caps = MakeShaderCaps(); + caps->fVersionDeclString = "#version 400"; + caps->fShaderDerivativeSupport = true; + return caps.release(); + }(); + return sCaps; + } + + static const ShaderCaps* Standalone() { + static const SkSL::ShaderCaps* sCaps = MakeShaderCaps().release(); + return sCaps; + } + +protected: + static std::unique_ptr MakeShaderCaps(); +}; + +#if !defined(SKSL_STANDALONE) && (defined(SK_GANESH) || defined(SK_GRAPHITE)) +bool type_to_sksltype(const Context& context, const Type& type, SkSLType* outType); +#endif + +void write_stringstream(const StringStream& d, OutputStream& out); + +} // namespace SkSL + +#endif // SKSL_UTIL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLCanExitWithoutReturningValue.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLCanExitWithoutReturningValue.cpp new file mode 100644 index 0000000000..015f233c4c --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLCanExitWithoutReturningValue.cpp @@ -0,0 +1,176 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLStatement.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLDoStatement.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLIfStatement.h" +#include "src/sksl/ir/SkSLSwitchCase.h" +#include "src/sksl/ir/SkSLSwitchStatement.h" +#include "src/sksl/ir/SkSLType.h" + +#include + +namespace SkSL { +class Expression; +namespace { + +class ReturnsOnAllPathsVisitor : public ProgramVisitor { +public: + bool visitExpression(const Expression& expr) override { + // We can avoid processing expressions entirely. + return false; + } + + bool visitStatement(const Statement& stmt) override { + switch (stmt.kind()) { + // Returns, breaks, or continues will stop the scan, so only one of these should ever be + // true. + case Statement::Kind::kReturn: + fFoundReturn = true; + return true; + + case Statement::Kind::kBreak: + fFoundBreak = true; + return true; + + case Statement::Kind::kContinue: + fFoundContinue = true; + return true; + + case Statement::Kind::kIf: { + const IfStatement& i = stmt.as(); + ReturnsOnAllPathsVisitor trueVisitor; + ReturnsOnAllPathsVisitor falseVisitor; + trueVisitor.visitStatement(*i.ifTrue()); + if (i.ifFalse()) { + falseVisitor.visitStatement(*i.ifFalse()); + } + // If either branch leads to a break or continue, we report the entire if as + // containing a break or continue, since we don't know which side will be reached. + fFoundBreak = (trueVisitor.fFoundBreak || falseVisitor.fFoundBreak); + fFoundContinue = (trueVisitor.fFoundContinue || falseVisitor.fFoundContinue); + // On the other hand, we only want to report returns that definitely happen, so we + // require those to be found on both sides. + fFoundReturn = (trueVisitor.fFoundReturn && falseVisitor.fFoundReturn); + return fFoundBreak || fFoundContinue || fFoundReturn; + } + case Statement::Kind::kFor: { + const ForStatement& f = stmt.as(); + // We assume a for/while loop runs for at least one iteration; this isn't strictly + // guaranteed, but it's better to be slightly over-permissive here than to fail on + // reasonable code. + ReturnsOnAllPathsVisitor forVisitor; + forVisitor.visitStatement(*f.statement()); + // A for loop that contains a break or continue is safe; it won't exit the entire + // function, just the loop. So we disregard those signals. + fFoundReturn = forVisitor.fFoundReturn; + return fFoundReturn; + } + case Statement::Kind::kDo: { + const DoStatement& d = stmt.as(); + // Do-while blocks are always entered at least once. + ReturnsOnAllPathsVisitor doVisitor; + doVisitor.visitStatement(*d.statement()); + // A do-while loop that contains a break or continue is safe; it won't exit the + // entire function, just the loop. So we disregard those signals. + fFoundReturn = doVisitor.fFoundReturn; + return fFoundReturn; + } + case Statement::Kind::kBlock: + // Blocks are definitely entered and don't imply any additional control flow. + // If the block contains a break, continue or return, we want to keep that. + return INHERITED::visitStatement(stmt); + + case Statement::Kind::kSwitch: { + // Switches are the most complex control flow we need to deal with; fortunately we + // already have good primitives for dissecting them. We need to verify that: + // - a default case exists, so that every possible input value is covered + // - every switch-case either (a) returns unconditionally, or + // (b) falls through to another case that does + const SwitchStatement& s = stmt.as(); + bool foundDefault = false; + bool fellThrough = false; + for (const std::unique_ptr& switchStmt : s.cases()) { + // The default case is indicated by a null value. A switch without a default + // case cannot definitively return, as its value might not be in the cases list. + const SwitchCase& sc = switchStmt->as(); + if (sc.isDefault()) { + foundDefault = true; + } + // Scan this switch-case for any exit (break, continue or return). + ReturnsOnAllPathsVisitor caseVisitor; + caseVisitor.visitStatement(sc); + + // If we found a break or continue, whether conditional or not, this switch case + // can't be called an unconditional return. Switches absorb breaks but not + // continues. + if (caseVisitor.fFoundContinue) { + fFoundContinue = true; + return false; + } + if (caseVisitor.fFoundBreak) { + return false; + } + // We just confirmed that there weren't any breaks or continues. If we didn't + // find an unconditional return either, the switch is considered fallen-through. + // (There might be a conditional return, but that doesn't count.) + fellThrough = !caseVisitor.fFoundReturn; + } + + // If we didn't find a default case, or the very last case fell through, this switch + // doesn't meet our criteria. + if (fellThrough || !foundDefault) { + return false; + } + + // We scanned the entire switch, found a default case, and every section either fell + // through or contained an unconditional return. + fFoundReturn = true; + return true; + } + + case Statement::Kind::kSwitchCase: + // Recurse into the switch-case. + return INHERITED::visitStatement(stmt); + + case Statement::Kind::kDiscard: + case Statement::Kind::kExpression: + case Statement::Kind::kNop: + case Statement::Kind::kVarDeclaration: + // None of these statements could contain a return. + break; + } + + return false; + } + + bool fFoundReturn = false; + bool fFoundBreak = false; + bool fFoundContinue = false; + + using INHERITED = ProgramVisitor; +}; + +} // namespace + +bool Analysis::CanExitWithoutReturningValue(const FunctionDeclaration& funcDecl, + const Statement& body) { + if (funcDecl.returnType().isVoid()) { + return false; + } + ReturnsOnAllPathsVisitor visitor; + visitor.visitStatement(body); + return !visitor.fFoundReturn; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLCheckProgramStructure.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLCheckProgramStructure.cpp new file mode 100644 index 0000000000..5407d820d8 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLCheckProgramStructure.cpp @@ -0,0 +1,223 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLStatement.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLPosition.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLProgram.h" + +#include +#include +#include +#include +#include + +namespace SkSL { + +bool Analysis::CheckProgramStructure(const Program& program, bool enforceSizeLimit) { + // We check the size of strict-ES2 programs; since SkVM will completely unroll them, it's + // important to know how large the result will be. For non-ES2 code, we compute an approximate + // lower bound by assuming all non-unrollable loops will execute one time only. + const Context& context = *program.fContext; + + // If we decide that expressions are cheaper than statements, or that certain statements are + // more expensive than others, etc., we can always tweak these ratios as needed. A very rough + // ballpark estimate is currently good enough for our purposes. + static constexpr size_t kExpressionCost = 1; + static constexpr size_t kStatementCost = 1; + static constexpr size_t kUnknownCost = -1; + static constexpr size_t kProgramSizeLimit = 100000; + static constexpr size_t kProgramStackDepthLimit = 50; + + class ProgramSizeVisitor : public ProgramVisitor { + public: + ProgramSizeVisitor(const Context& c) : fContext(c) {} + + using ProgramVisitor::visitProgramElement; + + size_t functionSize() const { + return fFunctionSize; + } + + bool visitProgramElement(const ProgramElement& pe) override { + if (pe.is()) { + // Check the function-size cache map first. We don't need to visit this function if + // we already processed it before. + const FunctionDeclaration* decl = &pe.as().declaration(); + if (size_t *cachedCost = fFunctionCostMap.find(decl)) { + // We already have this function in our map. We don't need to check it again. + if (*cachedCost == kUnknownCost) { + // If the function is present in the map with an unknown cost, we're + // recursively processing it--in other words, we found a cycle in the code. + // Unwind our stack into a string. + std::string msg = "\n\t" + decl->description(); + for (auto unwind = fStack.rbegin(); unwind != fStack.rend(); ++unwind) { + msg = "\n\t" + (*unwind)->description() + msg; + if (*unwind == decl) { + break; + } + } + msg = "potential recursion (function call cycle) not allowed:" + msg; + fContext.fErrors->error(pe.fPosition, std::move(msg)); + fFunctionSize = 0; + *cachedCost = 0; + return true; + } + // Set the size to its known value. + fFunctionSize = *cachedCost; + return false; + } + + // If the function-call stack has gotten too deep, stop the analysis. + if (fStack.size() >= kProgramStackDepthLimit) { + std::string msg = "exceeded max function call depth:"; + for (auto unwind = fStack.begin(); unwind != fStack.end(); ++unwind) { + msg += "\n\t" + (*unwind)->description(); + } + msg += "\n\t" + decl->description(); + fContext.fErrors->error(pe.fPosition, std::move(msg)); + fFunctionSize = 0; + fFunctionCostMap.set(decl, 0); + return true; + } + + // Calculate the function cost and store it in our cache. + fFunctionCostMap.set(decl, kUnknownCost); + fStack.push_back(decl); + fFunctionSize = 0; + bool result = INHERITED::visitProgramElement(pe); + fFunctionCostMap.set(decl, fFunctionSize); + fStack.pop_back(); + + return result; + } + + return INHERITED::visitProgramElement(pe); + } + + bool visitStatement(const Statement& stmt) override { + switch (stmt.kind()) { + case Statement::Kind::kFor: { + // We count a for-loop's unrolled size here. We expect that the init statement + // will be emitted once, and the test-expr, next-expr and statement will be + // repeated in the output for every iteration of the loop. + bool earlyExit = false; + const ForStatement& forStmt = stmt.as(); + if (forStmt.initializer() && this->visitStatement(*forStmt.initializer())) { + earlyExit = true; + } + + size_t originalFunctionSize = fFunctionSize; + fFunctionSize = 0; + + if (forStmt.next() && this->visitExpression(*forStmt.next())) { + earlyExit = true; + } + if (forStmt.test() && this->visitExpression(*forStmt.test())) { + earlyExit = true; + } + if (this->visitStatement(*forStmt.statement())) { + earlyExit = true; + } + + // ES2 programs always have a known unroll count. Non-ES2 programs don't enforce + // a maximum program size, so it's fine to treat the loop as executing once. + if (const LoopUnrollInfo* unrollInfo = forStmt.unrollInfo()) { + fFunctionSize = SkSafeMath::Mul(fFunctionSize, unrollInfo->fCount); + } + fFunctionSize = SkSafeMath::Add(fFunctionSize, originalFunctionSize); + return earlyExit; + } + + case Statement::Kind::kExpression: + // The cost of an expression-statement is counted in visitExpression. It would + // be double-dipping to count it here too. + break; + + case Statement::Kind::kNop: + case Statement::Kind::kVarDeclaration: + // These statements don't directly consume any space in a compiled program. + break; + + default: + // Note that we don't make any attempt to estimate the number of iterations of + // do-while loops here. Those aren't an ES2 construct so we aren't enforcing + // program size on them. + fFunctionSize = SkSafeMath::Add(fFunctionSize, kStatementCost); + break; + } + + return INHERITED::visitStatement(stmt); + } + + bool visitExpression(const Expression& expr) override { + // Other than function calls, all expressions are assumed to have a fixed unit cost. + bool earlyExit = false; + size_t expressionCost = kExpressionCost; + + if (expr.is()) { + // Visit this function call to calculate its size. If we've already sized it, this + // will retrieve the size from our cache. + const FunctionCall& call = expr.as(); + const FunctionDeclaration* decl = &call.function(); + if (decl->definition() && !decl->isIntrinsic()) { + size_t originalFunctionSize = fFunctionSize; + fFunctionSize = 0; + + earlyExit = this->visitProgramElement(*decl->definition()); + expressionCost = fFunctionSize; + + fFunctionSize = originalFunctionSize; + } + } + + fFunctionSize = SkSafeMath::Add(fFunctionSize, expressionCost); + return earlyExit || INHERITED::visitExpression(expr); + } + + private: + using INHERITED = ProgramVisitor; + + const Context& fContext; + size_t fFunctionSize = 0; + SkTHashMap fFunctionCostMap; + std::vector fStack; + }; + + // Process every function in our program. + ProgramSizeVisitor visitor{context}; + for (const std::unique_ptr& element : program.fOwnedElements) { + if (element->is()) { + // Visit every function--we want to detect static recursion and report it as an error, + // even in unreferenced functions. + visitor.visitProgramElement(*element); + // Report an error when main()'s flattened size is larger than our program limit. + if (enforceSizeLimit && + visitor.functionSize() > kProgramSizeLimit && + element->as().declaration().isMain()) { + context.fErrors->error(Position(), "program is too large"); + } + } + } + + return true; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLFinalizationChecks.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLFinalizationChecks.cpp new file mode 100644 index 0000000000..f1c0b4cdfa --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLFinalizationChecks.cpp @@ -0,0 +1,172 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLLayout.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "src/base/SkSafeMath.h" +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/analysis/SkSLProgramUsage.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLInterfaceBlock.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" + +#include +#include +#include +#include +#include + +namespace SkSL { +namespace { + +class FinalizationVisitor : public ProgramVisitor { +public: + FinalizationVisitor(const Context& c, const ProgramUsage& u) : fContext(c), fUsage(u) {} + + bool visitProgramElement(const ProgramElement& pe) override { + switch (pe.kind()) { + case ProgramElement::Kind::kGlobalVar: + this->checkGlobalVariableSizeLimit(pe.as()); + break; + case ProgramElement::Kind::kInterfaceBlock: + // TODO(skia:13664): Enforce duplicate checks universally. This is currently not + // possible without changes to the binding index assignment logic in graphite. + this->checkBindUniqueness(pe.as()); + break; + case ProgramElement::Kind::kFunction: + this->checkOutParamsAreAssigned(pe.as()); + break; + default: + break; + } + return INHERITED::visitProgramElement(pe); + } + + void checkGlobalVariableSizeLimit(const GlobalVarDeclaration& globalDecl) { + if (!ProgramConfig::IsRuntimeEffect(fContext.fConfig->fKind)) { + return; + } + const VarDeclaration& decl = globalDecl.varDeclaration(); + + size_t prevSlotsUsed = fGlobalSlotsUsed; + fGlobalSlotsUsed = SkSafeMath::Add(fGlobalSlotsUsed, decl.var()->type().slotCount()); + // To avoid overzealous error reporting, only trigger the error at the first place where the + // global limit is exceeded. + if (prevSlotsUsed < kVariableSlotLimit && fGlobalSlotsUsed >= kVariableSlotLimit) { + fContext.fErrors->error(decl.fPosition, + "global variable '" + std::string(decl.var()->name()) + + "' exceeds the size limit"); + } + } + + void checkBindUniqueness(const InterfaceBlock& block) { + const Variable* var = block.var(); + int32_t set = var->modifiers().fLayout.fSet; + int32_t binding = var->modifiers().fLayout.fBinding; + if (binding != -1) { + // TODO(skia:13664): This should map a `set` value of -1 to the default settings value + // used by codegen backends to prevent duplicates that may arise from the effective + // default set value. + uint64_t key = ((uint64_t)set << 32) + binding; + if (!fBindings.contains(key)) { + fBindings.add(key); + } else { + if (set != -1) { + fContext.fErrors->error(block.fPosition, + "layout(set=" + std::to_string(set) + + ", binding=" + std::to_string(binding) + + ") has already been defined"); + } else { + fContext.fErrors->error(block.fPosition, + "layout(binding=" + std::to_string(binding) + + ") has already been defined"); + } + } + } + } + + void checkOutParamsAreAssigned(const FunctionDefinition& funcDef) { + const FunctionDeclaration& funcDecl = funcDef.declaration(); + + // Searches for `out` parameters that are not written to. According to the GLSL spec, + // the value of an out-param that's never assigned to is unspecified, so report it. + for (const Variable* param : funcDecl.parameters()) { + const int paramInout = param->modifiers().fFlags & (Modifiers::Flag::kIn_Flag | + Modifiers::Flag::kOut_Flag); + if (paramInout == Modifiers::Flag::kOut_Flag) { + ProgramUsage::VariableCounts counts = fUsage.get(*param); + if (counts.fWrite <= 0) { + fContext.fErrors->error(param->fPosition, + "function '" + std::string(funcDecl.name()) + + "' never assigns a value to out parameter '" + + std::string(param->name()) + "'"); + } + } + } + } + + bool visitExpression(const Expression& expr) override { + switch (expr.kind()) { + case Expression::Kind::kFunctionCall: { + const FunctionDeclaration& decl = expr.as().function(); + if (!decl.isBuiltin() && !decl.definition()) { + fContext.fErrors->error(expr.fPosition, "function '" + decl.description() + + "' is not defined"); + } + break; + } + case Expression::Kind::kFunctionReference: + case Expression::Kind::kMethodReference: + case Expression::Kind::kTypeReference: + SkDEBUGFAIL("invalid reference-expr, should have been reported by coerce()"); + fContext.fErrors->error(expr.fPosition, "invalid expression"); + break; + default: + if (expr.type().matches(*fContext.fTypes.fInvalid)) { + fContext.fErrors->error(expr.fPosition, "invalid expression"); + } + break; + } + return INHERITED::visitExpression(expr); + } + +private: + using INHERITED = ProgramVisitor; + size_t fGlobalSlotsUsed = 0; + const Context& fContext; + const ProgramUsage& fUsage; + // we pack the set/binding pair into a single 64 bit int + SkTHashSet fBindings; +}; + +} // namespace + +void Analysis::DoFinalizationChecks(const Program& program) { + // Check all of the program's owned elements. (Built-in elements are assumed to be valid.) + FinalizationVisitor visitor{*program.fContext, *program.usage()}; + for (const std::unique_ptr& element : program.fOwnedElements) { + visitor.visitProgramElement(*element); + } +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLGetLoopControlFlowInfo.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLGetLoopControlFlowInfo.cpp new file mode 100644 index 0000000000..65c9e5e424 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLGetLoopControlFlowInfo.cpp @@ -0,0 +1,79 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLAnalysis.h" + +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLStatement.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" + +namespace SkSL { + +class Expression; + +namespace Analysis { +namespace { + +class LoopControlFlowVisitor : public ProgramVisitor { +public: + LoopControlFlowVisitor() {} + + bool visitExpression(const Expression& expr) override { + // We can avoid processing expressions entirely. + return false; + } + + bool visitStatement(const Statement& stmt) override { + switch (stmt.kind()) { + case Statement::Kind::kContinue: + // A continue only affects the control flow of the loop if it's not nested inside + // another looping structure. (Inside a switch, SkSL disallows continue entirely.) + fResult.fHasContinue |= (fDepth == 0); + break; + + case Statement::Kind::kBreak: + // A break only affects the control flow of the loop if it's not nested inside + // another loop/switch structure. + fResult.fHasBreak |= (fDepth == 0); + break; + + case Statement::Kind::kReturn: + // A return will abort the loop's control flow no matter how deeply it is nested. + fResult.fHasReturn = true; + break; + + case Statement::Kind::kFor: + case Statement::Kind::kDo: + case Statement::Kind::kSwitch: { + ++fDepth; + bool done = ProgramVisitor::visitStatement(stmt); + --fDepth; + return done; + } + + default: + return ProgramVisitor::visitStatement(stmt); + } + + // If we've already found everything we're hunting for, we can stop searching early. + return fResult.fHasContinue && fResult.fHasBreak && fResult.fHasReturn; + } + + LoopControlFlowInfo fResult; + int fDepth = 0; +}; + +} // namespace + +LoopControlFlowInfo GetLoopControlFlowInfo(const Statement& stmt) { + LoopControlFlowVisitor visitor; + visitor.visitStatement(stmt); + return visitor.fResult; +} + +} // namespace Analysis +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLGetLoopUnrollInfo.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLGetLoopUnrollInfo.cpp new file mode 100644 index 0000000000..cf49867392 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLGetLoopUnrollInfo.cpp @@ -0,0 +1,280 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLStatement.h" +#include "include/private/base/SkFloatingPoint.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLOperator.h" +#include "include/sksl/SkSLPosition.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLConstantFolder.h" +#include "src/sksl/analysis/SkSLNoOpErrorReporter.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLPostfixExpression.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +#include +#include + +namespace SkSL { + +// Loops that run for 100000+ iterations will exceed our program size limit. +static constexpr int kLoopTerminationLimit = 100000; + +static int calculate_count(double start, double end, double delta, bool forwards, bool inclusive) { + if (forwards != (start < end)) { + // The loop starts in a completed state (the start has already advanced past the end). + return 0; + } + if ((delta == 0.0) || forwards != (delta > 0.0)) { + // The loop does not progress toward a completed state, and will never terminate. + return kLoopTerminationLimit; + } + double iterations = sk_ieee_double_divide(end - start, delta); + double count = std::ceil(iterations); + if (inclusive && (count == iterations)) { + count += 1.0; + } + if (count > kLoopTerminationLimit || !std::isfinite(count)) { + // The loop runs for more iterations than we can safely unroll. + return kLoopTerminationLimit; + } + return (int)count; +} + +std::unique_ptr Analysis::GetLoopUnrollInfo(Position loopPos, + const ForLoopPositions& positions, + const Statement* loopInitializer, + const Expression* loopTest, + const Expression* loopNext, + const Statement* loopStatement, + ErrorReporter* errorPtr) { + NoOpErrorReporter unused; + ErrorReporter& errors = errorPtr ? *errorPtr : unused; + auto loopInfo = std::make_unique(); + + // + // init_declaration has the form: type_specifier identifier = constant_expression + // + if (!loopInitializer) { + Position pos = positions.initPosition.valid() ? positions.initPosition : loopPos; + errors.error(pos, "missing init declaration"); + return nullptr; + } + if (!loopInitializer->is()) { + errors.error(loopInitializer->fPosition, "invalid init declaration"); + return nullptr; + } + const VarDeclaration& initDecl = loopInitializer->as(); + if (!initDecl.baseType().isNumber()) { + errors.error(loopInitializer->fPosition, "invalid type for loop index"); + return nullptr; + } + if (initDecl.arraySize() != 0) { + errors.error(loopInitializer->fPosition, "invalid type for loop index"); + return nullptr; + } + if (!initDecl.value()) { + errors.error(loopInitializer->fPosition, "missing loop index initializer"); + return nullptr; + } + if (!ConstantFolder::GetConstantValue(*initDecl.value(), &loopInfo->fStart)) { + errors.error(loopInitializer->fPosition, + "loop index initializer must be a constant expression"); + return nullptr; + } + + loopInfo->fIndex = initDecl.var(); + + auto is_loop_index = [&](const std::unique_ptr& expr) { + return expr->is() && + expr->as().variable() == loopInfo->fIndex; + }; + + // + // condition has the form: loop_index relational_operator constant_expression + // + if (!loopTest) { + Position pos = positions.conditionPosition.valid() ? positions.conditionPosition : loopPos; + errors.error(pos, "missing condition"); + return nullptr; + } + if (!loopTest->is()) { + errors.error(loopTest->fPosition, "invalid condition"); + return nullptr; + } + const BinaryExpression& cond = loopTest->as(); + if (!is_loop_index(cond.left())) { + errors.error(loopTest->fPosition, "expected loop index on left hand side of condition"); + return nullptr; + } + // relational_operator is one of: > >= < <= == or != + switch (cond.getOperator().kind()) { + case Operator::Kind::GT: + case Operator::Kind::GTEQ: + case Operator::Kind::LT: + case Operator::Kind::LTEQ: + case Operator::Kind::EQEQ: + case Operator::Kind::NEQ: + break; + default: + errors.error(loopTest->fPosition, "invalid relational operator"); + return nullptr; + } + double loopEnd = 0; + if (!ConstantFolder::GetConstantValue(*cond.right(), &loopEnd)) { + errors.error(loopTest->fPosition, "loop index must be compared with a constant expression"); + return nullptr; + } + + // + // expression has one of the following forms: + // loop_index++ + // loop_index-- + // loop_index += constant_expression + // loop_index -= constant_expression + // The spec doesn't mention prefix increment and decrement, but there is some consensus that + // it's an oversight, so we allow those as well. + // + if (!loopNext) { + Position pos = positions.nextPosition.valid() ? positions.nextPosition : loopPos; + errors.error(pos, "missing loop expression"); + return nullptr; + } + switch (loopNext->kind()) { + case Expression::Kind::kBinary: { + const BinaryExpression& next = loopNext->as(); + if (!is_loop_index(next.left())) { + errors.error(loopNext->fPosition, "expected loop index in loop expression"); + return nullptr; + } + if (!ConstantFolder::GetConstantValue(*next.right(), &loopInfo->fDelta)) { + errors.error(loopNext->fPosition, + "loop index must be modified by a constant expression"); + return nullptr; + } + switch (next.getOperator().kind()) { + case Operator::Kind::PLUSEQ: break; + case Operator::Kind::MINUSEQ: loopInfo->fDelta = -loopInfo->fDelta; break; + default: + errors.error(loopNext->fPosition, "invalid operator in loop expression"); + return nullptr; + } + } break; + case Expression::Kind::kPrefix: { + const PrefixExpression& next = loopNext->as(); + if (!is_loop_index(next.operand())) { + errors.error(loopNext->fPosition, "expected loop index in loop expression"); + return nullptr; + } + switch (next.getOperator().kind()) { + case Operator::Kind::PLUSPLUS: loopInfo->fDelta = 1; break; + case Operator::Kind::MINUSMINUS: loopInfo->fDelta = -1; break; + default: + errors.error(loopNext->fPosition, "invalid operator in loop expression"); + return nullptr; + } + } break; + case Expression::Kind::kPostfix: { + const PostfixExpression& next = loopNext->as(); + if (!is_loop_index(next.operand())) { + errors.error(loopNext->fPosition, "expected loop index in loop expression"); + return nullptr; + } + switch (next.getOperator().kind()) { + case Operator::Kind::PLUSPLUS: loopInfo->fDelta = 1; break; + case Operator::Kind::MINUSMINUS: loopInfo->fDelta = -1; break; + default: + errors.error(loopNext->fPosition, "invalid operator in loop expression"); + return nullptr; + } + } break; + default: + errors.error(loopNext->fPosition, "invalid loop expression"); + return nullptr; + } + + // + // Within the body of the loop, the loop index is not statically assigned to, nor is it used as + // argument to a function 'out' or 'inout' parameter. + // + if (Analysis::StatementWritesToVariable(*loopStatement, *initDecl.var())) { + errors.error(loopStatement->fPosition, + "loop index must not be modified within body of the loop"); + return nullptr; + } + + // Finally, compute the iteration count, based on the bounds, and the termination operator. + loopInfo->fCount = 0; + + switch (cond.getOperator().kind()) { + case Operator::Kind::LT: + loopInfo->fCount = calculate_count(loopInfo->fStart, loopEnd, loopInfo->fDelta, + /*forwards=*/true, /*inclusive=*/false); + break; + + case Operator::Kind::GT: + loopInfo->fCount = calculate_count(loopInfo->fStart, loopEnd, loopInfo->fDelta, + /*forwards=*/false, /*inclusive=*/false); + break; + + case Operator::Kind::LTEQ: + loopInfo->fCount = calculate_count(loopInfo->fStart, loopEnd, loopInfo->fDelta, + /*forwards=*/true, /*inclusive=*/true); + break; + + case Operator::Kind::GTEQ: + loopInfo->fCount = calculate_count(loopInfo->fStart, loopEnd, loopInfo->fDelta, + /*forwards=*/false, /*inclusive=*/true); + break; + + case Operator::Kind::NEQ: { + float iterations = sk_ieee_double_divide(loopEnd - loopInfo->fStart, loopInfo->fDelta); + loopInfo->fCount = std::ceil(iterations); + if (loopInfo->fCount < 0 || loopInfo->fCount != iterations || + !std::isfinite(iterations)) { + // The loop doesn't reach the exact endpoint and so will never terminate. + loopInfo->fCount = kLoopTerminationLimit; + } + break; + } + case Operator::Kind::EQEQ: { + if (loopInfo->fStart == loopEnd) { + // Start and end begin in the same place, so we can run one iteration... + if (loopInfo->fDelta) { + // ... and then they diverge, so the loop terminates. + loopInfo->fCount = 1; + } else { + // ... but they never diverge, so the loop runs forever. + loopInfo->fCount = kLoopTerminationLimit; + } + } else { + // Start never equals end, so the loop will not run a single iteration. + loopInfo->fCount = 0; + } + break; + } + default: SkUNREACHABLE; + } + + SkASSERT(loopInfo->fCount >= 0); + if (loopInfo->fCount >= kLoopTerminationLimit) { + errors.error(loopPos, "loop must guarantee termination in fewer iterations"); + return nullptr; + } + + return loopInfo; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLGetReturnComplexity.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLGetReturnComplexity.cpp new file mode 100644 index 0000000000..a5b6e1132f --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLGetReturnComplexity.cpp @@ -0,0 +1,131 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLStatement.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLBlock.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" + +#include +#include + +namespace SkSL { + +class Expression; + +static int count_returns_at_end_of_control_flow(const FunctionDefinition& funcDef) { + class CountReturnsAtEndOfControlFlow : public ProgramVisitor { + public: + CountReturnsAtEndOfControlFlow(const FunctionDefinition& funcDef) { + this->visitProgramElement(funcDef); + } + + bool visitExpression(const Expression& expr) override { + // Do not recurse into expressions. + return false; + } + + bool visitStatement(const Statement& stmt) override { + switch (stmt.kind()) { + case Statement::Kind::kBlock: { + // Check only the last statement of a block. + const auto& block = stmt.as(); + return block.children().size() && + this->visitStatement(*block.children().back()); + } + case Statement::Kind::kSwitch: + case Statement::Kind::kDo: + case Statement::Kind::kFor: + // Don't introspect switches or loop structures at all. + return false; + + case Statement::Kind::kReturn: + ++fNumReturns; + [[fallthrough]]; + + default: + return INHERITED::visitStatement(stmt); + } + } + + int fNumReturns = 0; + using INHERITED = ProgramVisitor; + }; + + return CountReturnsAtEndOfControlFlow{funcDef}.fNumReturns; +} + +class CountReturnsWithLimit : public ProgramVisitor { +public: + CountReturnsWithLimit(const FunctionDefinition& funcDef, int limit) : fLimit(limit) { + this->visitProgramElement(funcDef); + } + + bool visitExpression(const Expression& expr) override { + // Do not recurse into expressions. + return false; + } + + bool visitStatement(const Statement& stmt) override { + switch (stmt.kind()) { + case Statement::Kind::kReturn: { + ++fNumReturns; + fDeepestReturn = std::max(fDeepestReturn, fScopedBlockDepth); + return (fNumReturns >= fLimit) || INHERITED::visitStatement(stmt); + } + case Statement::Kind::kVarDeclaration: { + if (fScopedBlockDepth > 1) { + fVariablesInBlocks = true; + } + return INHERITED::visitStatement(stmt); + } + case Statement::Kind::kBlock: { + int depthIncrement = stmt.as().isScope() ? 1 : 0; + fScopedBlockDepth += depthIncrement; + bool result = INHERITED::visitStatement(stmt); + fScopedBlockDepth -= depthIncrement; + if (fNumReturns == 0 && fScopedBlockDepth <= 1) { + // If closing this block puts us back at the top level, and we haven't + // encountered any return statements yet, any vardecls we may have encountered + // up until this point can be ignored. They are out of scope now, and they were + // never used in a return statement. + fVariablesInBlocks = false; + } + return result; + } + default: + return INHERITED::visitStatement(stmt); + } + } + + int fNumReturns = 0; + int fDeepestReturn = 0; + int fLimit = 0; + int fScopedBlockDepth = 0; + bool fVariablesInBlocks = false; + using INHERITED = ProgramVisitor; +}; + +Analysis::ReturnComplexity Analysis::GetReturnComplexity(const FunctionDefinition& funcDef) { + int returnsAtEndOfControlFlow = count_returns_at_end_of_control_flow(funcDef); + CountReturnsWithLimit counter{funcDef, returnsAtEndOfControlFlow + 1}; + if (counter.fNumReturns > returnsAtEndOfControlFlow) { + return ReturnComplexity::kEarlyReturns; + } + if (counter.fNumReturns > 1) { + return ReturnComplexity::kScopedReturns; + } + if (counter.fVariablesInBlocks && counter.fDeepestReturn > 1) { + return ReturnComplexity::kScopedReturns; + } + return ReturnComplexity::kSingleSafeReturn; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLHasSideEffects.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLHasSideEffects.cpp new file mode 100644 index 0000000000..0d328991e0 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLHasSideEffects.cpp @@ -0,0 +1,65 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLModifiers.h" +#include "include/sksl/SkSLOperator.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" + +namespace SkSL { + +bool Analysis::HasSideEffects(const Expression& expr) { + class HasSideEffectsVisitor : public ProgramVisitor { + public: + bool visitExpression(const Expression& expr) override { + switch (expr.kind()) { + case Expression::Kind::kFunctionCall: { + const FunctionCall& call = expr.as(); + if (!(call.function().modifiers().fFlags & Modifiers::kPure_Flag)) { + return true; + } + break; + } + case Expression::Kind::kPrefix: { + const PrefixExpression& prefix = expr.as(); + if (prefix.getOperator().kind() == Operator::Kind::PLUSPLUS || + prefix.getOperator().kind() == Operator::Kind::MINUSMINUS) { + return true; + } + break; + } + case Expression::Kind::kBinary: { + const BinaryExpression& binary = expr.as(); + if (binary.getOperator().isAssignment()) { + return true; + } + break; + } + case Expression::Kind::kPostfix: + return true; + + default: + break; + } + return INHERITED::visitExpression(expr); + } + + using INHERITED = ProgramVisitor; + }; + + HasSideEffectsVisitor visitor; + return visitor.visitExpression(expr); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLIsConstantExpression.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLIsConstantExpression.cpp new file mode 100644 index 0000000000..d0a54d2d4b --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLIsConstantExpression.cpp @@ -0,0 +1,113 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLModifiers.h" +#include "include/sksl/SkSLOperator.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +#include + +namespace SkSL { + +// Checks for ES2 constant-expression rules, and (optionally) constant-index-expression rules +// (if loopIndices is non-nullptr) +class ConstantExpressionVisitor : public ProgramVisitor { +public: + ConstantExpressionVisitor(const std::set* loopIndices) + : fLoopIndices(loopIndices) {} + + bool visitExpression(const Expression& e) override { + // A constant-(index)-expression is one of... + switch (e.kind()) { + // ... a literal value + case Expression::Kind::kLiteral: + return false; + + // ... settings can appear in fragment processors; they will resolve when compiled + case Expression::Kind::kSetting: + return false; + + // ... a global or local variable qualified as 'const', excluding function parameters. + // ... loop indices as defined in section 4. [constant-index-expression] + case Expression::Kind::kVariableReference: { + const Variable* v = e.as().variable(); + if ((v->storage() == Variable::Storage::kGlobal || + v->storage() == Variable::Storage::kLocal) && + (v->modifiers().fFlags & Modifiers::kConst_Flag)) { + return false; + } + return !fLoopIndices || fLoopIndices->find(v) == fLoopIndices->end(); + } + + // ... not a sequence expression (skia:13311)... + case Expression::Kind::kBinary: + if (e.as().getOperator().kind() == Operator::Kind::COMMA) { + return true; + } + [[fallthrough]]; + + // ... expressions composed of both of the above + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorArrayCast: + case Expression::Kind::kConstructorCompound: + case Expression::Kind::kConstructorCompoundCast: + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorStruct: + case Expression::Kind::kFieldAccess: + case Expression::Kind::kIndex: + case Expression::Kind::kPrefix: + case Expression::Kind::kPostfix: + case Expression::Kind::kSwizzle: + case Expression::Kind::kTernary: + return INHERITED::visitExpression(e); + + // Function calls are completely disallowed in SkSL constant-(index)-expressions. + // GLSL does mandate that calling a built-in function where the arguments are all + // constant-expressions should result in a constant-expression. SkSL handles this by + // optimizing fully-constant function calls into literals in FunctionCall::Make. + case Expression::Kind::kFunctionCall: + case Expression::Kind::kChildCall: + + // These shouldn't appear in a valid program at all, and definitely aren't + // constant-(index)-expressions. + case Expression::Kind::kPoison: + case Expression::Kind::kFunctionReference: + case Expression::Kind::kMethodReference: + case Expression::Kind::kTypeReference: + return true; + + default: + SkDEBUGFAIL("Unexpected expression type"); + return true; + } + } + +private: + const std::set* fLoopIndices; + using INHERITED = ProgramVisitor; +}; + +bool Analysis::IsConstantExpression(const Expression& expr) { + return !ConstantExpressionVisitor{/*loopIndices=*/nullptr}.visitExpression(expr); +} + +bool Analysis::IsConstantIndexExpression(const Expression& expr, + const std::set* loopIndices) { + return !ConstantExpressionVisitor{loopIndices}.visitExpression(expr); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLIsDynamicallyUniformExpression.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLIsDynamicallyUniformExpression.cpp new file mode 100644 index 0000000000..0e07fac6f5 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLIsDynamicallyUniformExpression.cpp @@ -0,0 +1,86 @@ +/* + * Copyright 2023 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLModifiers.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +namespace SkSL { + +bool Analysis::IsDynamicallyUniformExpression(const Expression& expr) { + class IsDynamicallyUniformExpressionVisitor : public ProgramVisitor { + public: + bool visitExpression(const Expression& expr) override { + switch (expr.kind()) { + case Expression::Kind::kBinary: + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorArrayCast: + case Expression::Kind::kConstructorCompound: + case Expression::Kind::kConstructorCompoundCast: + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorStruct: + case Expression::Kind::kFieldAccess: + case Expression::Kind::kIndex: + case Expression::Kind::kPostfix: + case Expression::Kind::kPrefix: + case Expression::Kind::kSwizzle: + case Expression::Kind::kTernary: + // These expressions might be dynamically uniform, if they are composed entirely + // of constants and uniforms. + break; + + case Expression::Kind::kVariableReference: { + // Verify that variable references are const or uniform. + const Variable* var = expr.as().variable(); + if (!var || !(var->modifiers().fFlags & (Modifiers::Flag::kConst_Flag | + Modifiers::Flag::kUniform_Flag))) { + fIsDynamicallyUniform = false; + return true; + } + break; + } + case Expression::Kind::kFunctionCall: { + // Verify that function calls are pure. + const FunctionDeclaration& decl = expr.as().function(); + if (!(decl.modifiers().fFlags & Modifiers::Flag::kPure_Flag)) { + fIsDynamicallyUniform = false; + return true; + } + break; + } + case Expression::Kind::kLiteral: + // Literals are compile-time constants. + return false; + + default: + // This expression isn't dynamically uniform. + fIsDynamicallyUniform = false; + return true; + } + return INHERITED::visitExpression(expr); + } + + bool fIsDynamicallyUniform = true; + using INHERITED = ProgramVisitor; + }; + + IsDynamicallyUniformExpressionVisitor visitor; + visitor.visitExpression(expr); + return visitor.fIsDynamicallyUniform; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLIsSameExpressionTree.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLIsSameExpressionTree.cpp new file mode 100644 index 0000000000..2c4506a725 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLIsSameExpressionTree.cpp @@ -0,0 +1,99 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/SkSLOperator.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/ir/SkSLConstructor.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLIndexExpression.h" +#include "src/sksl/ir/SkSLLiteral.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLSwizzle.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +#include +#include + +namespace SkSL { + +bool Analysis::IsSameExpressionTree(const Expression& left, const Expression& right) { + if (left.kind() != right.kind() || !left.type().matches(right.type())) { + return false; + } + + // This isn't a fully exhaustive list of expressions by any stretch of the imagination; for + // instance, `x[y+1] = x[y+1]` isn't detected because we don't look at BinaryExpressions. + // Since this is intended to be used for optimization purposes, handling the common cases is + // sufficient. + switch (left.kind()) { + case Expression::Kind::kLiteral: + return left.as().value() == right.as().value(); + + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorArrayCast: + case Expression::Kind::kConstructorCompound: + case Expression::Kind::kConstructorCompoundCast: + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorStruct: + case Expression::Kind::kConstructorSplat: { + if (left.kind() != right.kind()) { + return false; + } + const AnyConstructor& leftCtor = left.asAnyConstructor(); + const AnyConstructor& rightCtor = right.asAnyConstructor(); + const auto leftSpan = leftCtor.argumentSpan(); + const auto rightSpan = rightCtor.argumentSpan(); + if (leftSpan.size() != rightSpan.size()) { + return false; + } + for (size_t index = 0; index < leftSpan.size(); ++index) { + if (!IsSameExpressionTree(*leftSpan[index], *rightSpan[index])) { + return false; + } + } + return true; + } + case Expression::Kind::kFieldAccess: + return left.as().fieldIndex() == right.as().fieldIndex() && + IsSameExpressionTree(*left.as().base(), + *right.as().base()); + + case Expression::Kind::kIndex: + return IsSameExpressionTree(*left.as().index(), + *right.as().index()) && + IsSameExpressionTree(*left.as().base(), + *right.as().base()); + + case Expression::Kind::kPrefix: + return (left.as().getOperator().kind() == + right.as().getOperator().kind()) && + IsSameExpressionTree(*left.as().operand(), + *right.as().operand()); + + case Expression::Kind::kSwizzle: + return left.as().components() == right.as().components() && + IsSameExpressionTree(*left.as().base(), *right.as().base()); + + case Expression::Kind::kVariableReference: + return left.as().variable() == + right.as().variable(); + + default: + return false; + } +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLIsTrivialExpression.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLIsTrivialExpression.cpp new file mode 100644 index 0000000000..4479d1215d --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLIsTrivialExpression.cpp @@ -0,0 +1,70 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/ir/SkSLConstructor.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLIndexExpression.h" +#include "src/sksl/ir/SkSLSwizzle.h" +#include "src/sksl/ir/SkSLType.h" + +#include + +namespace SkSL { + +bool Analysis::IsTrivialExpression(const Expression& expr) { + switch (expr.kind()) { + case Expression::Kind::kLiteral: + case Expression::Kind::kVariableReference: + return true; + + case Expression::Kind::kSwizzle: + // All swizzles are considered to be trivial. + return IsTrivialExpression(*expr.as().base()); + + case Expression::Kind::kFieldAccess: + // Accessing a field is trivial. + return IsTrivialExpression(*expr.as().base()); + + case Expression::Kind::kIndex: { + // Accessing a constant array index is trivial. + const IndexExpression& inner = expr.as(); + return inner.index()->isIntLiteral() && IsTrivialExpression(*inner.base()); + } + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorStruct: + // Only consider small arrays/structs of compile-time-constants to be trivial. + return expr.type().slotCount() <= 4 && IsCompileTimeConstant(expr); + + case Expression::Kind::kConstructorArrayCast: + case Expression::Kind::kConstructorMatrixResize: + // These operations require function calls in Metal, so they're never trivial. + return false; + + case Expression::Kind::kConstructorCompound: + // Only compile-time-constant compound constructors are considered to be trivial. + return IsCompileTimeConstant(expr); + + case Expression::Kind::kConstructorCompoundCast: + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorDiagonalMatrix: { + // Single-argument constructors are trivial when their inner expression is trivial. + SkASSERT(expr.asAnyConstructor().argumentSpan().size() == 1); + const Expression& inner = *expr.asAnyConstructor().argumentSpan().front(); + return IsTrivialExpression(inner); + } + default: + return false; + } +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLNoOpErrorReporter.h b/gfx/skia/skia/src/sksl/analysis/SkSLNoOpErrorReporter.h new file mode 100644 index 0000000000..16040d4d71 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLNoOpErrorReporter.h @@ -0,0 +1,23 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLNoOpErrorReporter_DEFINED +#define SkSLNoOpErrorReporter_DEFINED + +#include "include/sksl/SkSLErrorReporter.h" + +namespace SkSL { + +// We can use a no-op error reporter to silently ignore errors. +class NoOpErrorReporter : public ErrorReporter { +public: + void handleError(std::string_view, Position) override {} +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLProgramUsage.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLProgramUsage.cpp new file mode 100644 index 0000000000..46f0a452b6 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLProgramUsage.cpp @@ -0,0 +1,242 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkTypes.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLStatement.h" +#include "include/private/base/SkDebug.h" +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/analysis/SkSLProgramUsage.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLInterfaceBlock.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +#include +#include +#include +#include + +namespace SkSL { + +struct Program; + +namespace { + +class ProgramUsageVisitor : public ProgramVisitor { +public: + ProgramUsageVisitor(ProgramUsage* usage, int delta) : fUsage(usage), fDelta(delta) {} + + bool visitProgramElement(const ProgramElement& pe) override { + if (pe.is()) { + for (const Variable* param : pe.as().declaration().parameters()) { + // Ensure function-parameter variables exist in the variable usage map. They aren't + // otherwise declared, but ProgramUsage::get() should be able to find them, even if + // they are unread and unwritten. + fUsage->fVariableCounts[param]; + } + } else if (pe.is()) { + // Ensure interface-block variables exist in the variable usage map. + fUsage->fVariableCounts[pe.as().var()]; + } + return INHERITED::visitProgramElement(pe); + } + + bool visitStatement(const Statement& s) override { + if (s.is()) { + // Add all declared variables to the usage map (even if never otherwise accessed). + const VarDeclaration& vd = s.as(); + ProgramUsage::VariableCounts& counts = fUsage->fVariableCounts[vd.var()]; + counts.fVarExists += fDelta; + SkASSERT(counts.fVarExists >= 0 && counts.fVarExists <= 1); + if (vd.value()) { + // The initial-value expression, when present, counts as a write. + counts.fWrite += fDelta; + } + } + return INHERITED::visitStatement(s); + } + + bool visitExpression(const Expression& e) override { + if (e.is()) { + const FunctionDeclaration* f = &e.as().function(); + fUsage->fCallCounts[f] += fDelta; + SkASSERT(fUsage->fCallCounts[f] >= 0); + } else if (e.is()) { + const VariableReference& ref = e.as(); + ProgramUsage::VariableCounts& counts = fUsage->fVariableCounts[ref.variable()]; + switch (ref.refKind()) { + case VariableRefKind::kRead: + counts.fRead += fDelta; + break; + case VariableRefKind::kWrite: + counts.fWrite += fDelta; + break; + case VariableRefKind::kReadWrite: + case VariableRefKind::kPointer: + counts.fRead += fDelta; + counts.fWrite += fDelta; + break; + } + SkASSERT(counts.fRead >= 0 && counts.fWrite >= 0); + } + return INHERITED::visitExpression(e); + } + + using ProgramVisitor::visitProgramElement; + using ProgramVisitor::visitStatement; + + ProgramUsage* fUsage; + int fDelta; + using INHERITED = ProgramVisitor; +}; + +} // namespace + +std::unique_ptr Analysis::GetUsage(const Program& program) { + auto usage = std::make_unique(); + ProgramUsageVisitor addRefs(usage.get(), /*delta=*/+1); + addRefs.visit(program); + return usage; +} + +std::unique_ptr Analysis::GetUsage(const Module& module) { + auto usage = std::make_unique(); + ProgramUsageVisitor addRefs(usage.get(), /*delta=*/+1); + + for (const Module* m = &module; m != nullptr; m = m->fParent) { + for (const std::unique_ptr& element : m->fElements) { + addRefs.visitProgramElement(*element); + } + } + return usage; +} + +ProgramUsage::VariableCounts ProgramUsage::get(const Variable& v) const { + const VariableCounts* counts = fVariableCounts.find(&v); + SkASSERT(counts); + return *counts; +} + +bool ProgramUsage::isDead(const Variable& v) const { + const Modifiers& modifiers = v.modifiers(); + VariableCounts counts = this->get(v); + if ((v.storage() != Variable::Storage::kLocal && counts.fRead) || + (modifiers.fFlags & + (Modifiers::kIn_Flag | Modifiers::kOut_Flag | Modifiers::kUniform_Flag))) { + return false; + } + // Consider the variable dead if it's never read and never written (besides the initial-value). + return !counts.fRead && (counts.fWrite <= (v.initialValue() ? 1 : 0)); +} + +int ProgramUsage::get(const FunctionDeclaration& f) const { + const int* count = fCallCounts.find(&f); + return count ? *count : 0; +} + +void ProgramUsage::add(const Expression* expr) { + ProgramUsageVisitor addRefs(this, /*delta=*/+1); + addRefs.visitExpression(*expr); +} + +void ProgramUsage::add(const Statement* stmt) { + ProgramUsageVisitor addRefs(this, /*delta=*/+1); + addRefs.visitStatement(*stmt); +} + +void ProgramUsage::add(const ProgramElement& element) { + ProgramUsageVisitor addRefs(this, /*delta=*/+1); + addRefs.visitProgramElement(element); +} + +void ProgramUsage::remove(const Expression* expr) { + ProgramUsageVisitor subRefs(this, /*delta=*/-1); + subRefs.visitExpression(*expr); +} + +void ProgramUsage::remove(const Statement* stmt) { + ProgramUsageVisitor subRefs(this, /*delta=*/-1); + subRefs.visitStatement(*stmt); +} + +void ProgramUsage::remove(const ProgramElement& element) { + ProgramUsageVisitor subRefs(this, /*delta=*/-1); + subRefs.visitProgramElement(element); +} + +static bool contains_matching_data(const ProgramUsage& a, const ProgramUsage& b) { + constexpr bool kReportMismatch = false; + + for (const auto& [varA, varCountA] : a.fVariableCounts) { + // Skip variable entries with zero reported usage. + if (!varCountA.fVarExists && !varCountA.fRead && !varCountA.fWrite) { + continue; + } + // Find the matching variable in the other map and ensure that its counts match. + const ProgramUsage::VariableCounts* varCountB = b.fVariableCounts.find(varA); + if (!varCountB || 0 != memcmp(&varCountA, varCountB, sizeof(varCountA))) { + if constexpr (kReportMismatch) { + SkDebugf("VariableCounts mismatch: '%.*s' (E%d R%d W%d != E%d R%d W%d)\n", + (int)varA->name().size(), varA->name().data(), + varCountA.fVarExists, + varCountA.fRead, + varCountA.fWrite, + varCountB ? varCountB->fVarExists : 0, + varCountB ? varCountB->fRead : 0, + varCountB ? varCountB->fWrite : 0); + } + return false; + } + } + + for (const auto& [callA, callCountA] : a.fCallCounts) { + // Skip function-call entries with zero reported usage. + if (!callCountA) { + continue; + } + // Find the matching function in the other map and ensure that its call-count matches. + const int* callCountB = b.fCallCounts.find(callA); + if (!callCountB || callCountA != *callCountB) { + if constexpr (kReportMismatch) { + SkDebugf("CallCounts mismatch: '%.*s' (%d != %d)\n", + (int)callA->name().size(), callA->name().data(), + callCountA, + callCountB ? *callCountB : 0); + } + return false; + } + } + + // Every non-zero entry in A has a matching non-zero entry in B. + return true; +} + +bool ProgramUsage::operator==(const ProgramUsage& that) const { + // ProgramUsage can be "equal" while the underlying hash maps look slightly different, because a + // dead-stripped variable or function will have a usage count of zero, but will still exist in + // the maps. If the program usage is re-analyzed from scratch, the maps will not contain an + // entry for these variables or functions at all. This means our maps can be "equal" while + // having different element counts. + // + // In order to check these maps, we compare map entries bi-directionally, skipping zero-usage + // entries. If all the non-zero elements in `this` match the elements in `that`, and all the + // non-zero elements in `that` match the elements in `this`, all the non-zero elements must be + // identical, and all the zero elements must be either zero or non-existent on both sides. + return contains_matching_data(*this, that) && + contains_matching_data(that, *this); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLProgramUsage.h b/gfx/skia/skia/src/sksl/analysis/SkSLProgramUsage.h new file mode 100644 index 0000000000..991240ce2d --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLProgramUsage.h @@ -0,0 +1,53 @@ +/* + * Copyright 2022 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_PROGRAMUSAGE +#define SKSL_PROGRAMUSAGE + +#include "include/core/SkTypes.h" +#include "src/core/SkTHash.h" + +namespace SkSL { + +class Expression; +class FunctionDeclaration; +class ProgramElement; +class Statement; +class Variable; + +/** + * Side-car class holding mutable information about a Program's IR + */ +class ProgramUsage { +public: + struct VariableCounts { + int fVarExists = 0; // if this is zero, the Variable might have already been deleted + int fRead = 0; + int fWrite = 0; + }; + VariableCounts get(const Variable&) const; + bool isDead(const Variable&) const; + + int get(const FunctionDeclaration&) const; + + void add(const Expression* expr); + void add(const Statement* stmt); + void add(const ProgramElement& element); + void remove(const Expression* expr); + void remove(const Statement* stmt); + void remove(const ProgramElement& element); + + bool operator==(const ProgramUsage& that) const; + bool operator!=(const ProgramUsage& that) const { return !(*this == that); } + + SkTHashMap fVariableCounts; + SkTHashMap fCallCounts; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLProgramVisitor.h b/gfx/skia/skia/src/sksl/analysis/SkSLProgramVisitor.h new file mode 100644 index 0000000000..3a27ef35d1 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLProgramVisitor.h @@ -0,0 +1,77 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSLProgramVisitor_DEFINED +#define SkSLProgramVisitor_DEFINED + +#include + +namespace SkSL { + +struct Program; +class Expression; +class Statement; +class ProgramElement; + +/** + * Utility class to visit every element, statement, and expression in an SkSL program IR. + * This is intended for simple analysis and accumulation, where custom visitation behavior is only + * needed for a limited set of expression kinds. + * + * Subclasses should override visitExpression/visitStatement/visitProgramElement as needed and + * intercept elements of interest. They can then invoke the base class's function to visit all + * sub expressions. They can also choose not to call the base function to arrest recursion, or + * implement custom recursion. + * + * The visit functions return a bool that determines how the default implementation recurses. Once + * any visit call returns true, the default behavior stops recursing and propagates true up the + * stack. + */ +template +class TProgramVisitor { +public: + virtual ~TProgramVisitor() = default; + +protected: + virtual bool visitExpression(typename T::Expression& expression); + virtual bool visitStatement(typename T::Statement& statement); + virtual bool visitProgramElement(typename T::ProgramElement& programElement); + + virtual bool visitExpressionPtr(typename T::UniquePtrExpression& expr) = 0; + virtual bool visitStatementPtr(typename T::UniquePtrStatement& stmt) = 0; +}; + +// ProgramVisitors take const types; ProgramWriters do not. +struct ProgramVisitorTypes { + using Program = const SkSL::Program; + using Expression = const SkSL::Expression; + using Statement = const SkSL::Statement; + using ProgramElement = const SkSL::ProgramElement; + using UniquePtrExpression = const std::unique_ptr; + using UniquePtrStatement = const std::unique_ptr; +}; + +extern template class TProgramVisitor; + +class ProgramVisitor : public TProgramVisitor { +public: + bool visit(const Program& program); + +private: + // ProgramVisitors shouldn't need access to unique_ptrs, and marking these as final should help + // these accessors inline away. Use ProgramWriter if you need the unique_ptrs. + bool visitExpressionPtr(const std::unique_ptr& e) final { + return this->visitExpression(*e); + } + bool visitStatementPtr(const std::unique_ptr& s) final { + return this->visitStatement(*s); + } +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLSwitchCaseContainsExit.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLSwitchCaseContainsExit.cpp new file mode 100644 index 0000000000..992df2adde --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLSwitchCaseContainsExit.cpp @@ -0,0 +1,98 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/SkSLAnalysis.h" + +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLStatement.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" + +namespace SkSL { + +class Expression; + +namespace { + +class SwitchCaseContainsExit : public ProgramVisitor { +public: + SwitchCaseContainsExit(bool conditionalExits) : fConditionalExits(conditionalExits) {} + + bool visitExpression(const Expression& expr) override { + // We can avoid processing expressions entirely. + return false; + } + + bool visitStatement(const Statement& stmt) override { + switch (stmt.kind()) { + case Statement::Kind::kBlock: + case Statement::Kind::kSwitchCase: + return INHERITED::visitStatement(stmt); + + case Statement::Kind::kReturn: + // Returns are an early exit regardless of the surrounding control structures. + return fConditionalExits ? fInConditional : !fInConditional; + + case Statement::Kind::kContinue: + // Continues are an early exit from switches, but not loops. + return !fInLoop && + (fConditionalExits ? fInConditional : !fInConditional); + + case Statement::Kind::kBreak: + // Breaks cannot escape from switches or loops. + return !fInLoop && !fInSwitch && + (fConditionalExits ? fInConditional : !fInConditional); + + case Statement::Kind::kIf: { + ++fInConditional; + bool result = INHERITED::visitStatement(stmt); + --fInConditional; + return result; + } + + case Statement::Kind::kFor: + case Statement::Kind::kDo: { + // Loops are treated as conditionals because a loop could potentially execute zero + // times. We don't have a straightforward way to determine that a loop definitely + // executes at least once. + ++fInConditional; + ++fInLoop; + bool result = INHERITED::visitStatement(stmt); + --fInLoop; + --fInConditional; + return result; + } + + case Statement::Kind::kSwitch: { + ++fInSwitch; + bool result = INHERITED::visitStatement(stmt); + --fInSwitch; + return result; + } + + default: + return false; + } + } + + bool fConditionalExits = false; + int fInConditional = 0; + int fInLoop = 0; + int fInSwitch = 0; + using INHERITED = ProgramVisitor; +}; + +} // namespace + +bool Analysis::SwitchCaseContainsUnconditionalExit(Statement& stmt) { + return SwitchCaseContainsExit{/*conditionalExits=*/false}.visitStatement(stmt); +} + +bool Analysis::SwitchCaseContainsConditionalExit(Statement& stmt) { + return SwitchCaseContainsExit{/*conditionalExits=*/true}.visitStatement(stmt); +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/analysis/SkSLSymbolTableStackBuilder.cpp b/gfx/skia/skia/src/sksl/analysis/SkSLSymbolTableStackBuilder.cpp new file mode 100644 index 0000000000..ada31aa000 --- /dev/null +++ b/gfx/skia/skia/src/sksl/analysis/SkSLSymbolTableStackBuilder.cpp @@ -0,0 +1,63 @@ +/* + * Copyright 2021 Google LLC + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLStatement.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/ir/SkSLBlock.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLSwitchStatement.h" + +#include +#include +#include + +namespace SkSL { + +class SymbolTable; + +namespace Analysis { + +SymbolTableStackBuilder::SymbolTableStackBuilder(const Statement* stmt, + std::vector>* stack) { + if (stmt) { + switch (stmt->kind()) { + case Statement::Kind::kBlock: + if (std::shared_ptr symbols = stmt->as().symbolTable()) { + stack->push_back(std::move(symbols)); + fStackToPop = stack; + } + break; + + case Statement::Kind::kFor: + if (std::shared_ptr symbols = stmt->as().symbols()) { + stack->push_back(std::move(symbols)); + fStackToPop = stack; + } + break; + + case Statement::Kind::kSwitch: + if (std::shared_ptr symbols = stmt->as().symbols()) { + stack->push_back(std::move(symbols)); + fStackToPop = stack; + } + break; + + default: + break; + } + } +} + +SymbolTableStackBuilder::~SymbolTableStackBuilder() { + if (fStackToPop) { + fStackToPop->pop_back(); + } +} + +} // namespace Analysis +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLCodeGenerator.h b/gfx/skia/skia/src/sksl/codegen/SkSLCodeGenerator.h new file mode 100644 index 0000000000..fd58648cd9 --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLCodeGenerator.h @@ -0,0 +1,89 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_CODEGENERATOR +#define SKSL_CODEGENERATOR + +#include "src/sksl/SkSLOutputStream.h" +#include "src/sksl/ir/SkSLProgram.h" + +namespace SkSL { + +/** + * Abstract superclass of all code generators, which take a Program as input and produce code as + * output. + */ +class CodeGenerator { +public: + CodeGenerator(const Context* context, const Program* program, OutputStream* out) + : fContext(*context) + , fProgram(*program) + , fOut(out) {} + + virtual ~CodeGenerator() {} + + virtual bool generateCode() = 0; + + // Intended for use by AutoOutputStream. + OutputStream* outputStream() { return fOut; } + void setOutputStream(OutputStream* output) { fOut = output; } + +protected: +#if defined(SK_USE_LEGACY_MIPMAP_LOD_BIAS) + static constexpr float kSharpenTexturesBias = -.5f; +#else + // For SkMipmapMode::kLinear we want a bias such that when the unbiased LOD value is + // midway between levels we select just the larger level, i.e. a bias of -.5. However, using + // this bias with kNearest mode with a draw that is a perfect power of two downscale puts us + // right on the rounding edge where it could go up or down depending on the particular GPU. + // Experimentally we found that at -.49 most iOS devices (iPhone 7, 8, and iPad Pro + // [PowerVRGT7800 version]) all round to the level twice as big as the device space footprint + // for some such draws in our unit tests on GLES. However, the iPhone 11 still fails and so + // we are using -.475. They do not at -.48. All other GPUs passed tests with -.499. Though, at + // this time the bias is not implemented in the MSL codegen and so iOS/Metal was not tested. + static constexpr float kSharpenTexturesBias = -.475f; +#endif + + const Context& fContext; + const Program& fProgram; + OutputStream* fOut; +}; + +class AutoOutputStream { +public: + // Maintains the current indentation level while writing to the new output stream. + AutoOutputStream(CodeGenerator* codeGen, OutputStream* newOutput) + : fCodeGen(codeGen) + , fOldOutput(codeGen->outputStream()) { + fCodeGen->setOutputStream(newOutput); + } + // Resets the indentation when entering the scope, and restores it when leaving. + AutoOutputStream(CodeGenerator* codeGen, OutputStream* newOutput, int *indentationPtr) + : fCodeGen(codeGen) + , fOldOutput(codeGen->outputStream()) + , fIndentationPtr(indentationPtr) + , fOldIndentation(indentationPtr ? *indentationPtr : 0) { + fCodeGen->setOutputStream(newOutput); + *fIndentationPtr = 0; + } + ~AutoOutputStream() { + fCodeGen->setOutputStream(fOldOutput); + if (fIndentationPtr) { + *fIndentationPtr = fOldIndentation; + } + } + +private: + CodeGenerator* fCodeGen = nullptr; + OutputStream* fOldOutput = nullptr; + int *fIndentationPtr = nullptr; + int fOldIndentation = 0; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLGLSLCodeGenerator.cpp b/gfx/skia/skia/src/sksl/codegen/SkSLGLSLCodeGenerator.cpp new file mode 100644 index 0000000000..c953a1a46c --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLGLSLCodeGenerator.cpp @@ -0,0 +1,1774 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/codegen/SkSLGLSLCodeGenerator.h" + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLLayout.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLStatement.h" +#include "include/private/SkSLString.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLOperator.h" +#include "include/sksl/SkSLPosition.h" +#include "src/base/SkStringView.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLGLSL.h" +#include "src/sksl/SkSLIntrinsicList.h" +#include "src/sksl/SkSLOutputStream.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/SkSLUtil.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLBlock.h" +#include "src/sksl/ir/SkSLConstructor.h" +#include "src/sksl/ir/SkSLConstructorArrayCast.h" +#include "src/sksl/ir/SkSLConstructorCompound.h" +#include "src/sksl/ir/SkSLConstructorDiagonalMatrix.h" +#include "src/sksl/ir/SkSLDoStatement.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLExpressionStatement.h" +#include "src/sksl/ir/SkSLExtension.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLFunctionPrototype.h" +#include "src/sksl/ir/SkSLIfStatement.h" +#include "src/sksl/ir/SkSLIndexExpression.h" +#include "src/sksl/ir/SkSLInterfaceBlock.h" +#include "src/sksl/ir/SkSLLiteral.h" +#include "src/sksl/ir/SkSLModifiersDeclaration.h" +#include "src/sksl/ir/SkSLPostfixExpression.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLReturnStatement.h" +#include "src/sksl/ir/SkSLSetting.h" +#include "src/sksl/ir/SkSLStructDefinition.h" +#include "src/sksl/ir/SkSLSwitchCase.h" +#include "src/sksl/ir/SkSLSwitchStatement.h" +#include "src/sksl/ir/SkSLSwizzle.h" +#include "src/sksl/ir/SkSLTernaryExpression.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" +#include "src/sksl/spirv.h" + +#include +#include +#include + +namespace SkSL { + +void GLSLCodeGenerator::write(std::string_view s) { + if (!s.length()) { + return; + } + if (fAtLineStart) { + for (int i = 0; i < fIndentation; i++) { + fOut->writeText(" "); + } + } + fOut->write(s.data(), s.length()); + fAtLineStart = false; +} + +void GLSLCodeGenerator::writeLine(std::string_view s) { + this->write(s); + fOut->writeText("\n"); + fAtLineStart = true; +} + +void GLSLCodeGenerator::finishLine() { + if (!fAtLineStart) { + this->writeLine(); + } +} + +void GLSLCodeGenerator::writeExtension(std::string_view name, bool require) { + fExtensions.writeText("#extension "); + fExtensions.write(name.data(), name.length()); + fExtensions.writeText(require ? " : require\n" : " : enable\n"); +} + +bool GLSLCodeGenerator::usesPrecisionModifiers() const { + return this->caps().fUsesPrecisionModifiers; +} + +void GLSLCodeGenerator::writeIdentifier(std::string_view identifier) { + // GLSL forbids two underscores in a row. + // If an identifier contains "__" or "_X", replace each "_" in the identifier with "_X". + if (skstd::contains(identifier, "__") || skstd::contains(identifier, "_X")) { + for (const char c : identifier) { + if (c == '_') { + this->write("_X"); + } else { + this->write(std::string_view(&c, 1)); + } + } + } else { + this->write(identifier); + } +} + +// Returns the name of the type with array dimensions, e.g. `float[2]`. +std::string GLSLCodeGenerator::getTypeName(const Type& raw) { + const Type& type = raw.resolve(); + switch (type.typeKind()) { + case Type::TypeKind::kVector: { + const Type& component = type.componentType(); + std::string result; + if (component.matches(*fContext.fTypes.fFloat) || + component.matches(*fContext.fTypes.fHalf)) { + result = "vec"; + } + else if (component.isSigned()) { + result = "ivec"; + } + else if (component.isUnsigned()) { + result = "uvec"; + } + else if (component.matches(*fContext.fTypes.fBool)) { + result = "bvec"; + } + else { + SK_ABORT("unsupported vector type"); + } + result += std::to_string(type.columns()); + return result; + } + case Type::TypeKind::kMatrix: { + std::string result; + const Type& component = type.componentType(); + if (component.matches(*fContext.fTypes.fFloat) || + component.matches(*fContext.fTypes.fHalf)) { + result = "mat"; + } + else { + SK_ABORT("unsupported matrix type"); + } + result += std::to_string(type.columns()); + if (type.columns() != type.rows()) { + result += "x"; + result += std::to_string(type.rows()); + } + return result; + } + case Type::TypeKind::kArray: { + std::string baseTypeName = this->getTypeName(type.componentType()); + if (type.isUnsizedArray()) { + return String::printf("%s[]", baseTypeName.c_str()); + } + return String::printf("%s[%d]", baseTypeName.c_str(), type.columns()); + } + case Type::TypeKind::kScalar: { + if (type.matches(*fContext.fTypes.fHalf)) { + return "float"; + } + else if (type.matches(*fContext.fTypes.fShort)) { + return "int"; + } + else if (type.matches(*fContext.fTypes.fUShort)) { + return "uint"; + } + + return std::string(type.name()); + } + default: + return std::string(type.name()); + } +} + +void GLSLCodeGenerator::writeStructDefinition(const StructDefinition& s) { + const Type& type = s.type(); + this->write("struct "); + this->writeIdentifier(type.name()); + this->writeLine(" {"); + fIndentation++; + for (const auto& f : type.fields()) { + this->writeModifiers(f.fModifiers, false); + this->writeTypePrecision(*f.fType); + const Type& baseType = f.fType->isArray() ? f.fType->componentType() : *f.fType; + this->writeType(baseType); + this->write(" "); + this->writeIdentifier(f.fName); + if (f.fType->isArray()) { + this->write("[" + std::to_string(f.fType->columns()) + "]"); + } + this->writeLine(";"); + } + fIndentation--; + this->writeLine("};"); +} + +void GLSLCodeGenerator::writeType(const Type& type) { + this->writeIdentifier(this->getTypeName(type)); +} + +void GLSLCodeGenerator::writeExpression(const Expression& expr, Precedence parentPrecedence) { + switch (expr.kind()) { + case Expression::Kind::kBinary: + this->writeBinaryExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kConstructorDiagonalMatrix: + this->writeConstructorDiagonalMatrix(expr.as(), + parentPrecedence); + break; + case Expression::Kind::kConstructorArrayCast: + this->writeExpression(*expr.as().argument(), parentPrecedence); + break; + case Expression::Kind::kConstructorCompound: + this->writeConstructorCompound(expr.as(), parentPrecedence); + break; + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorStruct: + this->writeAnyConstructor(expr.asAnyConstructor(), parentPrecedence); + break; + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorCompoundCast: + this->writeCastConstructor(expr.asAnyConstructor(), parentPrecedence); + break; + case Expression::Kind::kFieldAccess: + this->writeFieldAccess(expr.as()); + break; + case Expression::Kind::kFunctionCall: + this->writeFunctionCall(expr.as()); + break; + case Expression::Kind::kLiteral: + this->writeLiteral(expr.as()); + break; + case Expression::Kind::kPrefix: + this->writePrefixExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kPostfix: + this->writePostfixExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kSetting: + this->writeExpression(*expr.as().toLiteral(fContext), parentPrecedence); + break; + case Expression::Kind::kSwizzle: + this->writeSwizzle(expr.as()); + break; + case Expression::Kind::kVariableReference: + this->writeVariableReference(expr.as()); + break; + case Expression::Kind::kTernary: + this->writeTernaryExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kIndex: + this->writeIndexExpression(expr.as()); + break; + default: + SkDEBUGFAILF("unsupported expression: %s", expr.description().c_str()); + break; + } +} + +static bool is_abs(Expression& expr) { + return expr.is() && + expr.as().function().intrinsicKind() == k_abs_IntrinsicKind; +} + +// turns min(abs(x), y) into ((tmpVar1 = abs(x)) < (tmpVar2 = y) ? tmpVar1 : tmpVar2) to avoid a +// Tegra3 compiler bug. +void GLSLCodeGenerator::writeMinAbsHack(Expression& absExpr, Expression& otherExpr) { + SkASSERT(!this->caps().fCanUseMinAndAbsTogether); + std::string tmpVar1 = "minAbsHackVar" + std::to_string(fVarCount++); + std::string tmpVar2 = "minAbsHackVar" + std::to_string(fVarCount++); + this->fFunctionHeader += std::string(" ") + this->getTypePrecision(absExpr.type()) + + this->getTypeName(absExpr.type()) + " " + tmpVar1 + ";\n"; + this->fFunctionHeader += std::string(" ") + this->getTypePrecision(otherExpr.type()) + + this->getTypeName(otherExpr.type()) + " " + tmpVar2 + ";\n"; + this->write("((" + tmpVar1 + " = "); + this->writeExpression(absExpr, Precedence::kTopLevel); + this->write(") < (" + tmpVar2 + " = "); + this->writeExpression(otherExpr, Precedence::kAssignment); + this->write(") ? " + tmpVar1 + " : " + tmpVar2 + ")"); +} + +void GLSLCodeGenerator::writeInverseSqrtHack(const Expression& x) { + this->write("(1.0 / sqrt("); + this->writeExpression(x, Precedence::kTopLevel); + this->write("))"); +} + +static constexpr char kDeterminant2[] = R"( +float _determinant2(mat2 m) { +return m[0].x*m[1].y - m[0].y*m[1].x; +} +)"; + +static constexpr char kDeterminant3[] = R"( +float _determinant3(mat3 m) { +float + a00 = m[0].x, a01 = m[0].y, a02 = m[0].z, + a10 = m[1].x, a11 = m[1].y, a12 = m[1].z, + a20 = m[2].x, a21 = m[2].y, a22 = m[2].z, + b01 = a22*a11 - a12*a21, + b11 =-a22*a10 + a12*a20, + b21 = a21*a10 - a11*a20; +return a00*b01 + a01*b11 + a02*b21; +} +)"; + +static constexpr char kDeterminant4[] = R"( +mat4 _determinant4(mat4 m) { +float + a00 = m[0].x, a01 = m[0].y, a02 = m[0].z, a03 = m[0].w, + a10 = m[1].x, a11 = m[1].y, a12 = m[1].z, a13 = m[1].w, + a20 = m[2].x, a21 = m[2].y, a22 = m[2].z, a23 = m[2].w, + a30 = m[3].x, a31 = m[3].y, a32 = m[3].z, a33 = m[3].w, + b00 = a00*a11 - a01*a10, + b01 = a00*a12 - a02*a10, + b02 = a00*a13 - a03*a10, + b03 = a01*a12 - a02*a11, + b04 = a01*a13 - a03*a11, + b05 = a02*a13 - a03*a12, + b06 = a20*a31 - a21*a30, + b07 = a20*a32 - a22*a30, + b08 = a20*a33 - a23*a30, + b09 = a21*a32 - a22*a31, + b10 = a21*a33 - a23*a31, + b11 = a22*a33 - a23*a32; +return b00*b11 - b01*b10 + b02*b09 + b03*b08 - b04*b07 + b05*b06; +} +)"; + +void GLSLCodeGenerator::writeDeterminantHack(const Expression& mat) { + const Type& type = mat.type(); + if (type.matches(*fContext.fTypes.fFloat2x2) || + type.matches(*fContext.fTypes.fHalf2x2)) { + this->write("_determinant2("); + if (!fWrittenDeterminant2) { + fWrittenDeterminant2 = true; + fExtraFunctions.writeText(kDeterminant2); + } + } else if (type.matches(*fContext.fTypes.fFloat3x3) || + type.matches(*fContext.fTypes.fHalf3x3)) { + this->write("_determinant3("); + if (!fWrittenDeterminant3) { + fWrittenDeterminant3 = true; + fExtraFunctions.writeText(kDeterminant3); + } + } else if (type.matches(*fContext.fTypes.fFloat4x4) || + type.matches(*fContext.fTypes.fHalf4x4)) { + this->write("_determinant4("); + if (!fWrittenDeterminant4) { + fWrittenDeterminant4 = true; + fExtraFunctions.writeText(kDeterminant4); + } + } else { + SkDEBUGFAILF("no polyfill for determinant(%s)", type.description().c_str()); + this->write("determinant("); + } + this->writeExpression(mat, Precedence::kTopLevel); + this->write(")"); +} + +static constexpr char kInverse2[] = R"( +mat2 _inverse2(mat2 m) { +return mat2(m[1].y, -m[0].y, -m[1].x, m[0].x) / (m[0].x * m[1].y - m[0].y * m[1].x); +} +)"; + +static constexpr char kInverse3[] = R"( +mat3 _inverse3(mat3 m) { +float + a00 = m[0].x, a01 = m[0].y, a02 = m[0].z, + a10 = m[1].x, a11 = m[1].y, a12 = m[1].z, + a20 = m[2].x, a21 = m[2].y, a22 = m[2].z, + b01 = a22*a11 - a12*a21, + b11 =-a22*a10 + a12*a20, + b21 = a21*a10 - a11*a20, + det = a00*b01 + a01*b11 + a02*b21; +return mat3( + b01, (-a22*a01 + a02*a21), ( a12*a01 - a02*a11), + b11, ( a22*a00 - a02*a20), (-a12*a00 + a02*a10), + b21, (-a21*a00 + a01*a20), ( a11*a00 - a01*a10)) / det; +} +)"; + +static constexpr char kInverse4[] = R"( +mat4 _inverse4(mat4 m) { +float + a00 = m[0].x, a01 = m[0].y, a02 = m[0].z, a03 = m[0].w, + a10 = m[1].x, a11 = m[1].y, a12 = m[1].z, a13 = m[1].w, + a20 = m[2].x, a21 = m[2].y, a22 = m[2].z, a23 = m[2].w, + a30 = m[3].x, a31 = m[3].y, a32 = m[3].z, a33 = m[3].w, + b00 = a00*a11 - a01*a10, + b01 = a00*a12 - a02*a10, + b02 = a00*a13 - a03*a10, + b03 = a01*a12 - a02*a11, + b04 = a01*a13 - a03*a11, + b05 = a02*a13 - a03*a12, + b06 = a20*a31 - a21*a30, + b07 = a20*a32 - a22*a30, + b08 = a20*a33 - a23*a30, + b09 = a21*a32 - a22*a31, + b10 = a21*a33 - a23*a31, + b11 = a22*a33 - a23*a32, + det = b00*b11 - b01*b10 + b02*b09 + b03*b08 - b04*b07 + b05*b06; +return mat4( + a11*b11 - a12*b10 + a13*b09, + a02*b10 - a01*b11 - a03*b09, + a31*b05 - a32*b04 + a33*b03, + a22*b04 - a21*b05 - a23*b03, + a12*b08 - a10*b11 - a13*b07, + a00*b11 - a02*b08 + a03*b07, + a32*b02 - a30*b05 - a33*b01, + a20*b05 - a22*b02 + a23*b01, + a10*b10 - a11*b08 + a13*b06, + a01*b08 - a00*b10 - a03*b06, + a30*b04 - a31*b02 + a33*b00, + a21*b02 - a20*b04 - a23*b00, + a11*b07 - a10*b09 - a12*b06, + a00*b09 - a01*b07 + a02*b06, + a31*b01 - a30*b03 - a32*b00, + a20*b03 - a21*b01 + a22*b00) / det; +} +)"; + +void GLSLCodeGenerator::writeInverseHack(const Expression& mat) { + const Type& type = mat.type(); + if (type.matches(*fContext.fTypes.fFloat2x2) || type.matches(*fContext.fTypes.fHalf2x2)) { + this->write("_inverse2("); + if (!fWrittenInverse2) { + fWrittenInverse2 = true; + fExtraFunctions.writeText(kInverse2); + } + } else if (type.matches(*fContext.fTypes.fFloat3x3) || + type.matches(*fContext.fTypes.fHalf3x3)) { + this->write("_inverse3("); + if (!fWrittenInverse3) { + fWrittenInverse3 = true; + fExtraFunctions.writeText(kInverse3); + } + } else if (type.matches(*fContext.fTypes.fFloat4x4) || + type.matches(*fContext.fTypes.fHalf4x4)) { + this->write("_inverse4("); + if (!fWrittenInverse4) { + fWrittenInverse4 = true; + fExtraFunctions.writeText(kInverse4); + } + } else { + SkDEBUGFAILF("no polyfill for inverse(%s)", type.description().c_str()); + this->write("inverse("); + } + this->writeExpression(mat, Precedence::kTopLevel); + this->write(")"); +} + +void GLSLCodeGenerator::writeTransposeHack(const Expression& mat) { + const Type& type = mat.type(); + int c = type.columns(); + int r = type.rows(); + std::string name = "transpose" + std::to_string(c) + std::to_string(r); + + SkASSERT(c >= 2 && c <= 4); + SkASSERT(r >= 2 && r <= 4); + bool* writtenThisTranspose = &fWrittenTranspose[c - 2][r - 2]; + if (!*writtenThisTranspose) { + *writtenThisTranspose = true; + std::string typeName = this->getTypeName(type); + const Type& base = type.componentType(); + std::string transposed = this->getTypeName(base.toCompound(fContext, r, c)); + fExtraFunctions.writeText((transposed + " " + name + "(" + typeName + " m) { return " + + transposed + "(").c_str()); + auto separator = SkSL::String::Separator(); + for (int row = 0; row < r; ++row) { + for (int column = 0; column < c; ++column) { + fExtraFunctions.writeText(separator().c_str()); + fExtraFunctions.writeText(("m[" + std::to_string(column) + "][" + + std::to_string(row) + "]").c_str()); + } + } + fExtraFunctions.writeText("); }\n"); + } + this->write(name + "("); + this->writeExpression(mat, Precedence::kTopLevel); + this->write(")"); +} + +void GLSLCodeGenerator::writeFunctionCall(const FunctionCall& c) { + const FunctionDeclaration& function = c.function(); + const ExpressionArray& arguments = c.arguments(); + bool isTextureFunctionWithBias = false; + bool nameWritten = false; + const char* closingParen = ")"; + switch (c.function().intrinsicKind()) { + case k_abs_IntrinsicKind: { + if (!this->caps().fEmulateAbsIntFunction) + break; + SkASSERT(arguments.size() == 1); + if (!arguments[0]->type().matches(*fContext.fTypes.fInt)) { + break; + } + // abs(int) on Intel OSX is incorrect, so emulate it: + this->write("_absemulation"); + nameWritten = true; + if (!fWrittenAbsEmulation) { + fWrittenAbsEmulation = true; + fExtraFunctions.writeText("int _absemulation(int x) { return x * sign(x); }\n"); + } + break; + } + case k_atan_IntrinsicKind: + if (this->caps().fMustForceNegatedAtanParamToFloat && + arguments.size() == 2 && + arguments[1]->kind() == Expression::Kind::kPrefix) { + const PrefixExpression& p = (PrefixExpression&) *arguments[1]; + if (p.getOperator().kind() == Operator::Kind::MINUS) { + this->write("atan("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(", -1.0 * "); + this->writeExpression(*p.operand(), Precedence::kMultiplicative); + this->write(")"); + return; + } + } + break; + case k_ldexp_IntrinsicKind: + if (this->caps().fMustForceNegatedLdexpParamToMultiply && + arguments.size() == 2 && + arguments[1]->is()) { + const PrefixExpression& p = arguments[1]->as(); + if (p.getOperator().kind() == Operator::Kind::MINUS) { + this->write("ldexp("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(", "); + this->writeExpression(*p.operand(), Precedence::kMultiplicative); + this->write(" * -1)"); + return; + } + } + break; + case k_dFdy_IntrinsicKind: + // Flipping Y also negates the Y derivatives. + closingParen = "))"; + this->write("("); + if (!fProgram.fConfig->fSettings.fForceNoRTFlip) { + this->write(SKSL_RTFLIP_NAME ".y * "); + } + this->write("dFdy"); + nameWritten = true; + [[fallthrough]]; + case k_dFdx_IntrinsicKind: + case k_fwidth_IntrinsicKind: + if (!fFoundDerivatives && + this->caps().shaderDerivativeExtensionString()) { + this->writeExtension(this->caps().shaderDerivativeExtensionString()); + fFoundDerivatives = true; + } + break; + case k_determinant_IntrinsicKind: + if (!this->caps().fBuiltinDeterminantSupport) { + SkASSERT(arguments.size() == 1); + this->writeDeterminantHack(*arguments[0]); + return; + } + break; + case k_fma_IntrinsicKind: + if (!this->caps().fBuiltinFMASupport) { + SkASSERT(arguments.size() == 3); + this->write("(("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(") * ("); + this->writeExpression(*arguments[1], Precedence::kSequence); + this->write(") + ("); + this->writeExpression(*arguments[2], Precedence::kSequence); + this->write("))"); + return; + } + break; + case k_fract_IntrinsicKind: + if (!this->caps().fCanUseFractForNegativeValues) { + SkASSERT(arguments.size() == 1); + this->write("(0.5 - sign("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(") * (0.5 - fract(abs("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("))))"); + return; + } + break; + case k_inverse_IntrinsicKind: + if (this->caps().fGLSLGeneration < SkSL::GLSLGeneration::k140) { + SkASSERT(arguments.size() == 1); + this->writeInverseHack(*arguments[0]); + return; + } + break; + case k_inversesqrt_IntrinsicKind: + if (this->caps().fGLSLGeneration < SkSL::GLSLGeneration::k130) { + SkASSERT(arguments.size() == 1); + this->writeInverseSqrtHack(*arguments[0]); + return; + } + break; + case k_min_IntrinsicKind: + if (!this->caps().fCanUseMinAndAbsTogether) { + SkASSERT(arguments.size() == 2); + if (is_abs(*arguments[0])) { + this->writeMinAbsHack(*arguments[0], *arguments[1]); + return; + } + if (is_abs(*arguments[1])) { + // note that this violates the GLSL left-to-right evaluation semantics. + // I doubt it will ever end up mattering, but it's worth calling out. + this->writeMinAbsHack(*arguments[1], *arguments[0]); + return; + } + } + break; + case k_pow_IntrinsicKind: + if (!this->caps().fRemovePowWithConstantExponent) { + break; + } + // pow(x, y) on some NVIDIA drivers causes crashes if y is a constant. + // It's hard to tell what constitutes "constant" here, so just replace in all cases. + + // Change pow(x, y) into exp2(y * log2(x)) + this->write("exp2("); + this->writeExpression(*arguments[1], Precedence::kMultiplicative); + this->write(" * log2("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("))"); + return; + case k_saturate_IntrinsicKind: + SkASSERT(arguments.size() == 1); + this->write("clamp("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(", 0.0, 1.0)"); + return; + case k_sample_IntrinsicKind: { + const char* dim = ""; + bool proj = false; + const Type& arg0Type = arguments[0]->type(); + const Type& arg1Type = arguments[1]->type(); + switch (arg0Type.dimensions()) { + case SpvDim1D: + dim = "1D"; + isTextureFunctionWithBias = true; + if (arg1Type.matches(*fContext.fTypes.fFloat)) { + proj = false; + } else { + SkASSERT(arg1Type.matches(*fContext.fTypes.fFloat2)); + proj = true; + } + break; + case SpvDim2D: + dim = "2D"; + if (!arg0Type.matches(*fContext.fTypes.fSamplerExternalOES)) { + isTextureFunctionWithBias = true; + } + if (arg1Type.matches(*fContext.fTypes.fFloat2)) { + proj = false; + } else { + SkASSERT(arg1Type.matches(*fContext.fTypes.fFloat3)); + proj = true; + } + break; + case SpvDim3D: + dim = "3D"; + isTextureFunctionWithBias = true; + if (arg1Type.matches(*fContext.fTypes.fFloat3)) { + proj = false; + } else { + SkASSERT(arg1Type.matches(*fContext.fTypes.fFloat4)); + proj = true; + } + break; + case SpvDimCube: + dim = "Cube"; + isTextureFunctionWithBias = true; + proj = false; + break; + case SpvDimRect: + dim = "2DRect"; + proj = false; + break; + case SpvDimBuffer: + SkASSERT(false); // doesn't exist + dim = "Buffer"; + proj = false; + break; + case SpvDimSubpassData: + SkASSERT(false); // doesn't exist + dim = "SubpassData"; + proj = false; + break; + } + this->write("texture"); + if (this->caps().fGLSLGeneration < SkSL::GLSLGeneration::k130) { + this->write(dim); + } + if (proj) { + this->write("Proj"); + } + nameWritten = true; + break; + } + case k_sampleGrad_IntrinsicKind: { + SkASSERT(arguments.size() == 4); + this->write("textureGrad"); + nameWritten = true; + break; + } + case k_sampleLod_IntrinsicKind: { + SkASSERT(arguments.size() == 3); + this->write("textureLod"); + nameWritten = true; + break; + } + case k_transpose_IntrinsicKind: + if (this->caps().fGLSLGeneration < SkSL::GLSLGeneration::k130) { + SkASSERT(arguments.size() == 1); + this->writeTransposeHack(*arguments[0]); + return; + } + break; + default: + break; + } + + if (!nameWritten) { + this->writeIdentifier(function.mangledName()); + } + this->write("("); + auto separator = SkSL::String::Separator(); + for (const auto& arg : arguments) { + this->write(separator()); + this->writeExpression(*arg, Precedence::kSequence); + } + if (fProgram.fConfig->fSettings.fSharpenTextures && isTextureFunctionWithBias) { + this->write(String::printf(", %g", kSharpenTexturesBias)); + } + this->write(closingParen); +} + +void GLSLCodeGenerator::writeConstructorDiagonalMatrix(const ConstructorDiagonalMatrix& c, + Precedence parentPrecedence) { + if (c.type().columns() == 4 && c.type().rows() == 2) { + // Due to a longstanding bug in glslang and Mesa, several GPU drivers generate diagonal 4x2 + // matrices incorrectly. (skia:12003, https://github.com/KhronosGroup/glslang/pull/2646) + // We can work around this issue by multiplying a scalar by the identity matrix. + // In practice, this doesn't come up naturally in real code and we don't know every affected + // driver, so we just apply this workaround everywhere. + this->write("("); + this->writeType(c.type()); + this->write("(1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0) * "); + this->writeExpression(*c.argument(), Precedence::kMultiplicative); + this->write(")"); + return; + } + this->writeAnyConstructor(c, parentPrecedence); +} + +void GLSLCodeGenerator::writeConstructorCompound(const ConstructorCompound& c, + Precedence parentPrecedence) { + // If this is a 2x2 matrix constructor containing a single argument... + if (c.type().isMatrix() && c.arguments().size() == 1) { + // ... and that argument is a vec4... + const Expression& expr = *c.arguments().front(); + if (expr.type().isVector() && expr.type().columns() == 4) { + // ... let's rewrite the cast to dodge issues on very old GPUs. (skia:13559) + if (Analysis::IsTrivialExpression(expr)) { + this->writeType(c.type()); + this->write("("); + this->writeExpression(expr, Precedence::kPostfix); + this->write(".xy, "); + this->writeExpression(expr, Precedence::kPostfix); + this->write(".zw)"); + } else { + std::string tempVec = "_tempVec" + std::to_string(fVarCount++); + this->fFunctionHeader += std::string(" ") + this->getTypePrecision(expr.type()) + + this->getTypeName(expr.type()) + " " + tempVec + ";\n"; + this->write("(("); + this->write(tempVec); + this->write(" = "); + this->writeExpression(expr, Precedence::kAssignment); + this->write("), "); + this->writeType(c.type()); + this->write("("); + this->write(tempVec); + this->write(".xy, "); + this->write(tempVec); + this->write(".zw))"); + } + return; + } + } + this->writeAnyConstructor(c, parentPrecedence); +} + +void GLSLCodeGenerator::writeCastConstructor(const AnyConstructor& c, Precedence parentPrecedence) { + const auto arguments = c.argumentSpan(); + SkASSERT(arguments.size() == 1); + + const Expression& argument = *arguments.front(); + if ((this->getTypeName(c.type()) == this->getTypeName(argument.type()) || + (argument.type().matches(*fContext.fTypes.fFloatLiteral)))) { + // In cases like half(float), they're different types as far as SkSL is concerned but + // the same type as far as GLSL is concerned. We avoid a redundant float(float) by just + // writing out the inner expression here. + this->writeExpression(argument, parentPrecedence); + return; + } + + // This cast should be emitted as-is. + return this->writeAnyConstructor(c, parentPrecedence); +} + +void GLSLCodeGenerator::writeAnyConstructor(const AnyConstructor& c, Precedence parentPrecedence) { + this->writeType(c.type()); + this->write("("); + auto separator = SkSL::String::Separator(); + for (const auto& arg : c.argumentSpan()) { + this->write(separator()); + this->writeExpression(*arg, Precedence::kSequence); + } + this->write(")"); +} + +void GLSLCodeGenerator::writeFragCoord() { + if (!this->caps().fCanUseFragCoord) { + if (!fSetupFragCoordWorkaround) { + const char* precision = this->usesPrecisionModifiers() ? "highp " : ""; + fFunctionHeader += precision; + fFunctionHeader += " float sk_FragCoord_InvW = 1. / sk_FragCoord_Workaround.w;\n"; + fFunctionHeader += precision; + fFunctionHeader += " vec4 sk_FragCoord_Resolved = " + "vec4(sk_FragCoord_Workaround.xyz * sk_FragCoord_InvW, sk_FragCoord_InvW);\n"; + // Ensure that we get exact .5 values for x and y. + fFunctionHeader += " sk_FragCoord_Resolved.xy = floor(sk_FragCoord_Resolved.xy) + " + "vec2(.5);\n"; + fSetupFragCoordWorkaround = true; + } + this->writeIdentifier("sk_FragCoord_Resolved"); + return; + } + + if (!fSetupFragPosition) { + fFunctionHeader += this->usesPrecisionModifiers() ? "highp " : ""; + fFunctionHeader += " vec4 sk_FragCoord = vec4(" + "gl_FragCoord.x, "; + if (fProgram.fConfig->fSettings.fForceNoRTFlip) { + fFunctionHeader += "gl_FragCoord.y, "; + } else { + fFunctionHeader += SKSL_RTFLIP_NAME ".x + " SKSL_RTFLIP_NAME ".y * gl_FragCoord.y, "; + } + fFunctionHeader += + "gl_FragCoord.z, " + "gl_FragCoord.w);\n"; + fSetupFragPosition = true; + } + this->writeIdentifier("sk_FragCoord"); +} + +void GLSLCodeGenerator::writeVariableReference(const VariableReference& ref) { + switch (ref.variable()->modifiers().fLayout.fBuiltin) { + case SK_FRAGCOLOR_BUILTIN: + if (this->caps().mustDeclareFragmentShaderOutput()) { + this->writeIdentifier("sk_FragColor"); + } else { + this->writeIdentifier("gl_FragColor"); + } + break; + case SK_SECONDARYFRAGCOLOR_BUILTIN: + this->writeIdentifier("gl_SecondaryFragColorEXT"); + break; + case SK_FRAGCOORD_BUILTIN: + this->writeFragCoord(); + break; + case SK_CLOCKWISE_BUILTIN: + if (!fSetupClockwise) { + fFunctionHeader += " bool sk_Clockwise = gl_FrontFacing;\n"; + if (!fProgram.fConfig->fSettings.fForceNoRTFlip) { + fFunctionHeader += " if (" SKSL_RTFLIP_NAME ".y < 0.0) {\n" + " sk_Clockwise = !sk_Clockwise;\n" + " }\n"; + } + fSetupClockwise = true; + } + this->writeIdentifier("sk_Clockwise"); + break; + case SK_VERTEXID_BUILTIN: + this->writeIdentifier("gl_VertexID"); + break; + case SK_INSTANCEID_BUILTIN: + this->writeIdentifier("gl_InstanceID"); + break; + case SK_LASTFRAGCOLOR_BUILTIN: + if (this->caps().fFBFetchSupport) { + this->write(this->caps().fFBFetchColorName); + } else { + fContext.fErrors->error(ref.fPosition, + "sk_LastFragColor requires framebuffer fetch support"); + } + break; + default: + this->writeIdentifier(ref.variable()->mangledName()); + break; + } +} + +void GLSLCodeGenerator::writeIndexExpression(const IndexExpression& expr) { + this->writeExpression(*expr.base(), Precedence::kPostfix); + this->write("["); + this->writeExpression(*expr.index(), Precedence::kTopLevel); + this->write("]"); +} + +bool is_sk_position(const FieldAccess& f) { + return f.base()->type().fields()[f.fieldIndex()].fModifiers.fLayout.fBuiltin == + SK_POSITION_BUILTIN; +} + +void GLSLCodeGenerator::writeFieldAccess(const FieldAccess& f) { + if (f.ownerKind() == FieldAccess::OwnerKind::kDefault) { + this->writeExpression(*f.base(), Precedence::kPostfix); + this->write("."); + } + const Type& baseType = f.base()->type(); + int builtin = baseType.fields()[f.fieldIndex()].fModifiers.fLayout.fBuiltin; + if (builtin == SK_POSITION_BUILTIN) { + this->writeIdentifier("gl_Position"); + } else if (builtin == SK_POINTSIZE_BUILTIN) { + this->writeIdentifier("gl_PointSize"); + } else { + this->writeIdentifier(baseType.fields()[f.fieldIndex()].fName); + } +} + +void GLSLCodeGenerator::writeSwizzle(const Swizzle& swizzle) { + this->writeExpression(*swizzle.base(), Precedence::kPostfix); + this->write("."); + for (int c : swizzle.components()) { + SkASSERT(c >= 0 && c <= 3); + this->write(&("x\0y\0z\0w\0"[c * 2])); + } +} + +void GLSLCodeGenerator::writeMatrixComparisonWorkaround(const BinaryExpression& b) { + const Expression& left = *b.left(); + const Expression& right = *b.right(); + Operator op = b.getOperator(); + + SkASSERT(op.kind() == Operator::Kind::EQEQ || op.kind() == Operator::Kind::NEQ); + SkASSERT(left.type().isMatrix()); + SkASSERT(right.type().isMatrix()); + + std::string tempMatrix1 = "_tempMatrix" + std::to_string(fVarCount++); + std::string tempMatrix2 = "_tempMatrix" + std::to_string(fVarCount++); + + this->fFunctionHeader += std::string(" ") + this->getTypePrecision(left.type()) + + this->getTypeName(left.type()) + " " + tempMatrix1 + ";\n " + + this->getTypePrecision(right.type()) + + this->getTypeName(right.type()) + " " + tempMatrix2 + ";\n"; + this->write("((" + tempMatrix1 + " = "); + this->writeExpression(left, Precedence::kAssignment); + this->write("), (" + tempMatrix2 + " = "); + this->writeExpression(right, Precedence::kAssignment); + this->write("), (" + tempMatrix1); + this->write(op.operatorName()); + this->write(tempMatrix2 + "))"); +} + +void GLSLCodeGenerator::writeBinaryExpression(const BinaryExpression& b, + Precedence parentPrecedence) { + const Expression& left = *b.left(); + const Expression& right = *b.right(); + Operator op = b.getOperator(); + if (this->caps().fUnfoldShortCircuitAsTernary && + (op.kind() == Operator::Kind::LOGICALAND || op.kind() == Operator::Kind::LOGICALOR)) { + this->writeShortCircuitWorkaroundExpression(b, parentPrecedence); + return; + } + + if (this->caps().fRewriteMatrixComparisons && + left.type().isMatrix() && right.type().isMatrix() && + (op.kind() == Operator::Kind::EQEQ || op.kind() == Operator::Kind::NEQ)) { + this->writeMatrixComparisonWorkaround(b); + return; + } + + Precedence precedence = op.getBinaryPrecedence(); + if (precedence >= parentPrecedence) { + this->write("("); + } + bool positionWorkaround = ProgramConfig::IsVertex(fProgram.fConfig->fKind) && + op.isAssignment() && + left.is() && + is_sk_position(left.as()) && + !Analysis::ContainsRTAdjust(right) && + !this->caps().fCanUseFragCoord; + if (positionWorkaround) { + this->write("sk_FragCoord_Workaround = ("); + } + this->writeExpression(left, precedence); + this->write(op.operatorName()); + this->writeExpression(right, precedence); + if (positionWorkaround) { + this->write(")"); + } + if (precedence >= parentPrecedence) { + this->write(")"); + } +} + +void GLSLCodeGenerator::writeShortCircuitWorkaroundExpression(const BinaryExpression& b, + Precedence parentPrecedence) { + if (Precedence::kTernary >= parentPrecedence) { + this->write("("); + } + + // Transform: + // a && b => a ? b : false + // a || b => a ? true : b + this->writeExpression(*b.left(), Precedence::kTernary); + this->write(" ? "); + if (b.getOperator().kind() == Operator::Kind::LOGICALAND) { + this->writeExpression(*b.right(), Precedence::kTernary); + } else { + Literal boolTrue(Position(), /*value=*/1, fContext.fTypes.fBool.get()); + this->writeLiteral(boolTrue); + } + this->write(" : "); + if (b.getOperator().kind() == Operator::Kind::LOGICALAND) { + Literal boolFalse(Position(), /*value=*/0, fContext.fTypes.fBool.get()); + this->writeLiteral(boolFalse); + } else { + this->writeExpression(*b.right(), Precedence::kTernary); + } + if (Precedence::kTernary >= parentPrecedence) { + this->write(")"); + } +} + +void GLSLCodeGenerator::writeTernaryExpression(const TernaryExpression& t, + Precedence parentPrecedence) { + if (Precedence::kTernary >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*t.test(), Precedence::kTernary); + this->write(" ? "); + this->writeExpression(*t.ifTrue(), Precedence::kTernary); + this->write(" : "); + this->writeExpression(*t.ifFalse(), Precedence::kTernary); + if (Precedence::kTernary >= parentPrecedence) { + this->write(")"); + } +} + +void GLSLCodeGenerator::writePrefixExpression(const PrefixExpression& p, + Precedence parentPrecedence) { + if (Precedence::kPrefix >= parentPrecedence) { + this->write("("); + } + this->write(p.getOperator().tightOperatorName()); + this->writeExpression(*p.operand(), Precedence::kPrefix); + if (Precedence::kPrefix >= parentPrecedence) { + this->write(")"); + } +} + +void GLSLCodeGenerator::writePostfixExpression(const PostfixExpression& p, + Precedence parentPrecedence) { + if (Precedence::kPostfix >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*p.operand(), Precedence::kPostfix); + this->write(p.getOperator().tightOperatorName()); + if (Precedence::kPostfix >= parentPrecedence) { + this->write(")"); + } +} + +void GLSLCodeGenerator::writeLiteral(const Literal& l) { + const Type& type = l.type(); + if (type.isInteger()) { + if (type.matches(*fContext.fTypes.fUInt)) { + this->write(std::to_string(l.intValue() & 0xffffffff) + "u"); + } else if (type.matches(*fContext.fTypes.fUShort)) { + this->write(std::to_string(l.intValue() & 0xffff) + "u"); + } else { + this->write(std::to_string(l.intValue())); + } + return; + } + this->write(l.description(OperatorPrecedence::kTopLevel)); +} + +void GLSLCodeGenerator::writeFunctionDeclaration(const FunctionDeclaration& f) { + this->writeTypePrecision(f.returnType()); + this->writeType(f.returnType()); + this->write(" "); + this->writeIdentifier(f.mangledName()); + this->write("("); + auto separator = SkSL::String::Separator(); + for (size_t index = 0; index < f.parameters().size(); ++index) { + const Variable* param = f.parameters()[index]; + + // This is a workaround for our test files. They use the runtime effect signature, so main + // takes a coords parameter. The IR generator tags those with a builtin ID (sk_FragCoord), + // and we omit them from the declaration here, so the function is valid GLSL. + if (f.isMain() && param->modifiers().fLayout.fBuiltin != -1) { + continue; + } + this->write(separator()); + Modifiers modifiers = param->modifiers(); + if (this->caps().fRemoveConstFromFunctionParameters) { + modifiers.fFlags &= ~Modifiers::kConst_Flag; + } + this->writeModifiers(modifiers, false); + std::vector sizes; + const Type* type = ¶m->type(); + if (type->isArray()) { + sizes.push_back(type->columns()); + type = &type->componentType(); + } + this->writeTypePrecision(*type); + this->writeType(*type); + this->write(" "); + if (!param->name().empty()) { + this->writeIdentifier(param->mangledName()); + } else { + // By the spec, GLSL does not require function parameters to be named (see + // `single_declaration` in the Shading Language Grammar), but some older versions of + // GLSL report "formal parameter lacks a name" if a parameter is not named. + this->write("_skAnonymousParam"); + this->write(std::to_string(index)); + } + for (int s : sizes) { + this->write("[" + std::to_string(s) + "]"); + } + } + this->write(")"); +} + +void GLSLCodeGenerator::writeFunction(const FunctionDefinition& f) { + fSetupFragPosition = false; + fSetupFragCoordWorkaround = false; + + this->writeFunctionDeclaration(f.declaration()); + this->writeLine(" {"); + fIndentation++; + + fFunctionHeader.clear(); + OutputStream* oldOut = fOut; + StringStream buffer; + fOut = &buffer; + for (const std::unique_ptr& stmt : f.body()->as().children()) { + if (!stmt->isEmpty()) { + this->writeStatement(*stmt); + this->finishLine(); + } + } + + fIndentation--; + this->writeLine("}"); + + fOut = oldOut; + this->write(fFunctionHeader); + this->write(buffer.str()); +} + +void GLSLCodeGenerator::writeFunctionPrototype(const FunctionPrototype& f) { + this->writeFunctionDeclaration(f.declaration()); + this->writeLine(";"); +} + +void GLSLCodeGenerator::writeModifiers(const Modifiers& modifiers, + bool globalContext) { + std::string layout = modifiers.fLayout.description(); + if (layout.size()) { + this->write(layout + " "); + } + + // For GLSL 4.1 and below, qualifier-order matters! These are written out in Modifier-bit order. + if (modifiers.fFlags & Modifiers::kFlat_Flag) { + this->write("flat "); + } + if (modifiers.fFlags & Modifiers::kNoPerspective_Flag) { + this->write("noperspective "); + } + + if (modifiers.fFlags & Modifiers::kConst_Flag) { + this->write("const "); + } + if (modifiers.fFlags & Modifiers::kUniform_Flag) { + this->write("uniform "); + } + if ((modifiers.fFlags & Modifiers::kIn_Flag) && + (modifiers.fFlags & Modifiers::kOut_Flag)) { + this->write("inout "); + } else if (modifiers.fFlags & Modifiers::kIn_Flag) { + if (globalContext && this->caps().fGLSLGeneration < SkSL::GLSLGeneration::k130) { + this->write(ProgramConfig::IsVertex(fProgram.fConfig->fKind) ? "attribute " + : "varying "); + } else { + this->write("in "); + } + } else if (modifiers.fFlags & Modifiers::kOut_Flag) { + if (globalContext && + this->caps().fGLSLGeneration < SkSL::GLSLGeneration::k130) { + this->write("varying "); + } else { + this->write("out "); + } + } + + if (modifiers.fFlags & Modifiers::kReadOnly_Flag) { + this->write("readonly "); + } + if (modifiers.fFlags & Modifiers::kWriteOnly_Flag) { + this->write("writeonly "); + } + if (modifiers.fFlags & Modifiers::kBuffer_Flag) { + this->write("buffer "); + } +} + +void GLSLCodeGenerator::writeInterfaceBlock(const InterfaceBlock& intf) { + if (intf.typeName() == "sk_PerVertex") { + return; + } + const Type* structType = &intf.var()->type().componentType(); + this->writeModifiers(intf.var()->modifiers(), true); + this->writeType(*structType); + this->writeLine(" {"); + fIndentation++; + for (const auto& f : structType->fields()) { + this->writeModifiers(f.fModifiers, false); + this->writeTypePrecision(*f.fType); + this->writeType(*f.fType); + this->write(" "); + this->writeIdentifier(f.fName); + this->writeLine(";"); + } + fIndentation--; + this->write("}"); + if (intf.instanceName().size()) { + this->write(" "); + this->writeIdentifier(intf.instanceName()); + if (intf.arraySize() > 0) { + this->write("["); + this->write(std::to_string(intf.arraySize())); + this->write("]"); + } + } + this->writeLine(";"); +} + +void GLSLCodeGenerator::writeVarInitializer(const Variable& var, const Expression& value) { + this->writeExpression(value, Precedence::kTopLevel); +} + +const char* GLSLCodeGenerator::getTypePrecision(const Type& type) { + if (this->usesPrecisionModifiers()) { + switch (type.typeKind()) { + case Type::TypeKind::kScalar: + if (type.matches(*fContext.fTypes.fShort) || + type.matches(*fContext.fTypes.fUShort)) { + if (fProgram.fConfig->fSettings.fForceHighPrecision || + this->caps().fIncompleteShortIntPrecision) { + return "highp "; + } + return "mediump "; + } + if (type.matches(*fContext.fTypes.fHalf)) { + return fProgram.fConfig->fSettings.fForceHighPrecision ? "highp " : "mediump "; + } + if (type.matches(*fContext.fTypes.fFloat) || type.matches(*fContext.fTypes.fInt) || + type.matches(*fContext.fTypes.fUInt)) { + return "highp "; + } + return ""; + case Type::TypeKind::kVector: // fall through + case Type::TypeKind::kMatrix: + case Type::TypeKind::kArray: + return this->getTypePrecision(type.componentType()); + default: + break; + } + } + return ""; +} + +void GLSLCodeGenerator::writeTypePrecision(const Type& type) { + this->write(this->getTypePrecision(type)); +} + +void GLSLCodeGenerator::writeVarDeclaration(const VarDeclaration& var, bool global) { + this->writeModifiers(var.var()->modifiers(), global); + this->writeTypePrecision(var.baseType()); + this->writeType(var.baseType()); + this->write(" "); + this->writeIdentifier(var.var()->mangledName()); + if (var.arraySize() > 0) { + this->write("["); + this->write(std::to_string(var.arraySize())); + this->write("]"); + } + if (var.value()) { + this->write(" = "); + this->writeVarInitializer(*var.var(), *var.value()); + } + if (!fFoundExternalSamplerDecl && + var.var()->type().matches(*fContext.fTypes.fSamplerExternalOES)) { + if (this->caps().externalTextureExtensionString()) { + this->writeExtension(this->caps().externalTextureExtensionString()); + } + if (this->caps().secondExternalTextureExtensionString()) { + this->writeExtension(this->caps().secondExternalTextureExtensionString()); + } + fFoundExternalSamplerDecl = true; + } + if (!fFoundRectSamplerDecl && var.var()->type().matches(*fContext.fTypes.fSampler2DRect)) { + fFoundRectSamplerDecl = true; + } + this->write(";"); +} + +void GLSLCodeGenerator::writeStatement(const Statement& s) { + switch (s.kind()) { + case Statement::Kind::kBlock: + this->writeBlock(s.as()); + break; + case Statement::Kind::kExpression: + this->writeExpressionStatement(s.as()); + break; + case Statement::Kind::kReturn: + this->writeReturnStatement(s.as()); + break; + case Statement::Kind::kVarDeclaration: + this->writeVarDeclaration(s.as(), false); + break; + case Statement::Kind::kIf: + this->writeIfStatement(s.as()); + break; + case Statement::Kind::kFor: + this->writeForStatement(s.as()); + break; + case Statement::Kind::kDo: + this->writeDoStatement(s.as()); + break; + case Statement::Kind::kSwitch: + this->writeSwitchStatement(s.as()); + break; + case Statement::Kind::kBreak: + this->write("break;"); + break; + case Statement::Kind::kContinue: + this->write("continue;"); + break; + case Statement::Kind::kDiscard: + this->write("discard;"); + break; + case Statement::Kind::kNop: + this->write(";"); + break; + default: + SkDEBUGFAILF("unsupported statement: %s", s.description().c_str()); + break; + } +} + +void GLSLCodeGenerator::writeBlock(const Block& b) { + // Write scope markers if this block is a scope, or if the block is empty (since we need to emit + // something here to make the code valid). + bool isScope = b.isScope() || b.isEmpty(); + if (isScope) { + this->writeLine("{"); + fIndentation++; + } + for (const std::unique_ptr& stmt : b.children()) { + if (!stmt->isEmpty()) { + this->writeStatement(*stmt); + this->finishLine(); + } + } + if (isScope) { + fIndentation--; + this->write("}"); + } +} + +void GLSLCodeGenerator::writeIfStatement(const IfStatement& stmt) { + this->write("if ("); + this->writeExpression(*stmt.test(), Precedence::kTopLevel); + this->write(") "); + this->writeStatement(*stmt.ifTrue()); + if (stmt.ifFalse()) { + this->write(" else "); + this->writeStatement(*stmt.ifFalse()); + } +} + +void GLSLCodeGenerator::writeForStatement(const ForStatement& f) { + // Emit loops of the form 'for(;test;)' as 'while(test)', which is probably how they started + if (!f.initializer() && f.test() && !f.next()) { + this->write("while ("); + this->writeExpression(*f.test(), Precedence::kTopLevel); + this->write(") "); + this->writeStatement(*f.statement()); + return; + } + + this->write("for ("); + if (f.initializer() && !f.initializer()->isEmpty()) { + this->writeStatement(*f.initializer()); + } else { + this->write("; "); + } + if (f.test()) { + if (this->caps().fAddAndTrueToLoopCondition) { + std::unique_ptr and_true(new BinaryExpression( + Position(), f.test()->clone(), Operator::Kind::LOGICALAND, + Literal::MakeBool(fContext, Position(), /*value=*/true), + fContext.fTypes.fBool.get())); + this->writeExpression(*and_true, Precedence::kTopLevel); + } else { + this->writeExpression(*f.test(), Precedence::kTopLevel); + } + } + this->write("; "); + if (f.next()) { + this->writeExpression(*f.next(), Precedence::kTopLevel); + } + this->write(") "); + this->writeStatement(*f.statement()); +} + +void GLSLCodeGenerator::writeDoStatement(const DoStatement& d) { + if (!this->caps().fRewriteDoWhileLoops) { + this->write("do "); + this->writeStatement(*d.statement()); + this->write(" while ("); + this->writeExpression(*d.test(), Precedence::kTopLevel); + this->write(");"); + return; + } + + // Otherwise, do the do while loop workaround, to rewrite loops of the form: + // do { + // CODE; + // } while (CONDITION) + // + // to loops of the form + // bool temp = false; + // while (true) { + // if (temp) { + // if (!CONDITION) { + // break; + // } + // } + // temp = true; + // CODE; + // } + std::string tmpVar = "_tmpLoopSeenOnce" + std::to_string(fVarCount++); + this->write("bool "); + this->write(tmpVar); + this->writeLine(" = false;"); + this->writeLine("while (true) {"); + fIndentation++; + this->write("if ("); + this->write(tmpVar); + this->writeLine(") {"); + fIndentation++; + this->write("if (!"); + this->writeExpression(*d.test(), Precedence::kPrefix); + this->writeLine(") {"); + fIndentation++; + this->writeLine("break;"); + fIndentation--; + this->writeLine("}"); + fIndentation--; + this->writeLine("}"); + this->write(tmpVar); + this->writeLine(" = true;"); + this->writeStatement(*d.statement()); + this->finishLine(); + fIndentation--; + this->write("}"); +} + +void GLSLCodeGenerator::writeExpressionStatement(const ExpressionStatement& s) { + if (fProgram.fConfig->fSettings.fOptimize && !Analysis::HasSideEffects(*s.expression())) { + // Don't emit dead expressions. + return; + } + this->writeExpression(*s.expression(), Precedence::kTopLevel); + this->write(";"); +} + +void GLSLCodeGenerator::writeSwitchStatement(const SwitchStatement& s) { + if (this->caps().fRewriteSwitchStatements) { + std::string fallthroughVar = "_tmpSwitchFallthrough" + std::to_string(fVarCount++); + std::string valueVar = "_tmpSwitchValue" + std::to_string(fVarCount++); + std::string loopVar = "_tmpSwitchLoop" + std::to_string(fVarCount++); + this->write("int "); + this->write(valueVar); + this->write(" = "); + this->writeExpression(*s.value(), Precedence::kAssignment); + this->write(", "); + this->write(fallthroughVar); + this->writeLine(" = 0;"); + this->write("for (int "); + this->write(loopVar); + this->write(" = 0; "); + this->write(loopVar); + this->write(" < 1; "); + this->write(loopVar); + this->writeLine("++) {"); + fIndentation++; + + bool firstCase = true; + for (const std::unique_ptr& stmt : s.cases()) { + const SwitchCase& c = stmt->as(); + if (!c.isDefault()) { + this->write("if (("); + if (firstCase) { + firstCase = false; + } else { + this->write(fallthroughVar); + this->write(" > 0) || ("); + } + this->write(valueVar); + this->write(" == "); + this->write(std::to_string(c.value())); + this->writeLine(")) {"); + fIndentation++; + + // We write the entire case-block statement here, and then set `switchFallthrough` + // to 1. If the case-block had a break statement in it, we break out of the outer + // for-loop entirely, meaning the `switchFallthrough` assignment never occurs, nor + // does any code after it inside the switch. We've forbidden `continue` statements + // inside switch case-blocks entirely, so we don't need to consider their effect on + // control flow; see the Finalizer in FunctionDefinition::Convert. + this->writeStatement(*c.statement()); + this->finishLine(); + this->write(fallthroughVar); + this->write(" = 1;"); + this->writeLine(); + + fIndentation--; + this->writeLine("}"); + } else { + // This is the default case. Since it's always last, we can just dump in the code. + this->writeStatement(*c.statement()); + this->finishLine(); + } + } + + fIndentation--; + this->writeLine("}"); + return; + } + + this->write("switch ("); + this->writeExpression(*s.value(), Precedence::kTopLevel); + this->writeLine(") {"); + fIndentation++; + // If a switch contains only a `default` case and nothing else, this confuses some drivers and + // can lead to a crash. Adding a real case before the default seems to work around the bug, + // and doesn't change the meaning of the switch. (skia:12465) + if (s.cases().size() == 1 && s.cases().front()->as().isDefault()) { + this->writeLine("case 0:"); + } + + // The GLSL spec insists that the last case in a switch statement must have an associated + // statement. In practice, the Apple GLSL compiler crashes if that statement is a no-op, such as + // a semicolon or an empty brace pair. (This is filed as FB11992149.) It also crashes if we put + // two `break` statements in a row. To work around this while honoring the rules of the + // standard, we inject an extra break if and only if the last switch-case block is empty. + bool foundEmptyCase = false; + + for (const std::unique_ptr& stmt : s.cases()) { + const SwitchCase& c = stmt->as(); + if (c.isDefault()) { + this->writeLine("default:"); + } else { + this->write("case "); + this->write(std::to_string(c.value())); + this->writeLine(":"); + } + if (c.statement()->isEmpty()) { + foundEmptyCase = true; + } else { + foundEmptyCase = false; + fIndentation++; + this->writeStatement(*c.statement()); + this->finishLine(); + fIndentation--; + } + } + if (foundEmptyCase) { + fIndentation++; + this->writeLine("break;"); + fIndentation--; + } + fIndentation--; + this->finishLine(); + this->write("}"); +} + +void GLSLCodeGenerator::writeReturnStatement(const ReturnStatement& r) { + this->write("return"); + if (r.expression()) { + this->write(" "); + this->writeExpression(*r.expression(), Precedence::kTopLevel); + } + this->write(";"); +} + +void GLSLCodeGenerator::writeHeader() { + if (this->caps().fVersionDeclString) { + this->write(this->caps().fVersionDeclString); + this->finishLine(); + } +} + +void GLSLCodeGenerator::writeProgramElement(const ProgramElement& e) { + switch (e.kind()) { + case ProgramElement::Kind::kExtension: + this->writeExtension(e.as().name()); + break; + case ProgramElement::Kind::kGlobalVar: { + const VarDeclaration& decl = e.as().varDeclaration(); + int builtin = decl.var()->modifiers().fLayout.fBuiltin; + if (builtin == -1) { + // normal var + this->writeVarDeclaration(decl, true); + this->finishLine(); + } else if (builtin == SK_FRAGCOLOR_BUILTIN && + this->caps().mustDeclareFragmentShaderOutput()) { + if (fProgram.fConfig->fSettings.fFragColorIsInOut) { + this->write("inout "); + } else { + this->write("out "); + } + if (this->usesPrecisionModifiers()) { + this->write("mediump "); + } + this->writeLine("vec4 sk_FragColor;"); + } + break; + } + case ProgramElement::Kind::kInterfaceBlock: + this->writeInterfaceBlock(e.as()); + break; + case ProgramElement::Kind::kFunction: + this->writeFunction(e.as()); + break; + case ProgramElement::Kind::kFunctionPrototype: + this->writeFunctionPrototype(e.as()); + break; + case ProgramElement::Kind::kModifiers: { + const Modifiers& modifiers = e.as().modifiers(); + this->writeModifiers(modifiers, true); + this->writeLine(";"); + break; + } + case ProgramElement::Kind::kStructDefinition: + this->writeStructDefinition(e.as()); + break; + default: + SkDEBUGFAILF("unsupported program element %s\n", e.description().c_str()); + break; + } +} + +void GLSLCodeGenerator::writeInputVars() { + if (fProgram.fInputs.fUseFlipRTUniform) { + const char* precision = this->usesPrecisionModifiers() ? "highp " : ""; + fGlobals.writeText("uniform "); + fGlobals.writeText(precision); + fGlobals.writeText("vec2 " SKSL_RTFLIP_NAME ";\n"); + } +} + +bool GLSLCodeGenerator::generateCode() { + this->writeHeader(); + OutputStream* rawOut = fOut; + StringStream body; + fOut = &body; + // Write all the program elements except for functions. + for (const ProgramElement* e : fProgram.elements()) { + if (!e->is()) { + this->writeProgramElement(*e); + } + } + // Emit prototypes for every built-in function; these aren't always added in perfect order. + for (const ProgramElement* e : fProgram.fSharedElements) { + if (e->is()) { + this->writeFunctionDeclaration(e->as().declaration()); + this->writeLine(";"); + } + } + // Write the functions last. + // Why don't we write things in their original order? Because the Inliner likes to move function + // bodies around. After inlining, code can inadvertently move upwards, above ProgramElements + // that the code relies on. + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + this->writeProgramElement(*e); + } + } + fOut = rawOut; + + write_stringstream(fExtensions, *rawOut); + this->writeInputVars(); + write_stringstream(fGlobals, *rawOut); + + if (!this->caps().fCanUseFragCoord) { + Layout layout; + if (ProgramConfig::IsVertex(fProgram.fConfig->fKind)) { + Modifiers modifiers(layout, Modifiers::kOut_Flag); + this->writeModifiers(modifiers, true); + if (this->usesPrecisionModifiers()) { + this->write("highp "); + } + this->write("vec4 sk_FragCoord_Workaround;\n"); + } else if (ProgramConfig::IsFragment(fProgram.fConfig->fKind)) { + Modifiers modifiers(layout, Modifiers::kIn_Flag); + this->writeModifiers(modifiers, true); + if (this->usesPrecisionModifiers()) { + this->write("highp "); + } + this->write("vec4 sk_FragCoord_Workaround;\n"); + } + } + + if (this->usesPrecisionModifiers()) { + const char* precision = + fProgram.fConfig->fSettings.fForceHighPrecision ? "highp" : "mediump"; + this->write(String::printf("precision %s float;\n", precision)); + this->write(String::printf("precision %s sampler2D;\n", precision)); + if (fFoundExternalSamplerDecl && !this->caps().fNoDefaultPrecisionForExternalSamplers) { + this->write(String::printf("precision %s samplerExternalOES;\n", precision)); + } + if (fFoundRectSamplerDecl) { + this->write(String::printf("precision %s sampler2DRect;\n", precision)); + } + } + write_stringstream(fExtraFunctions, *rawOut); + write_stringstream(body, *rawOut); + return fContext.fErrors->errorCount() == 0; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLGLSLCodeGenerator.h b/gfx/skia/skia/src/sksl/codegen/SkSLGLSLCodeGenerator.h new file mode 100644 index 0000000000..e6672ab45f --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLGLSLCodeGenerator.h @@ -0,0 +1,210 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_GLSLCODEGENERATOR +#define SKSL_GLSLCODEGENERATOR + +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLStringStream.h" +#include "src/sksl/codegen/SkSLCodeGenerator.h" + +#include +#include +#include + +namespace SkSL { + +class AnyConstructor; +class BinaryExpression; +class Block; +class ConstructorCompound; +class ConstructorDiagonalMatrix; +class DoStatement; +class Expression; +class ExpressionStatement; +class FieldAccess; +class ForStatement; +class FunctionCall; +class FunctionDeclaration; +class FunctionDefinition; +class FunctionPrototype; +class IfStatement; +class IndexExpression; +class InterfaceBlock; +class Literal; +class OutputStream; +class PostfixExpression; +class PrefixExpression; +class ProgramElement; +class ReturnStatement; +class Statement; +class StructDefinition; +class SwitchStatement; +class Swizzle; +class TernaryExpression; +class Type; +class VarDeclaration; +class Variable; +class VariableReference; +enum class OperatorPrecedence : uint8_t; +struct Layout; +struct Modifiers; +struct Program; +struct ShaderCaps; + +/** + * Converts a Program into GLSL code. + */ +class GLSLCodeGenerator : public CodeGenerator { +public: + GLSLCodeGenerator(const Context* context, const Program* program, OutputStream* out) + : INHERITED(context, program, out) {} + + bool generateCode() override; + +protected: + using Precedence = OperatorPrecedence; + + void write(std::string_view s); + + void writeLine(std::string_view s = std::string_view()); + + void finishLine(); + + virtual void writeHeader(); + + bool usesPrecisionModifiers() const; + + void writeIdentifier(std::string_view identifier); + + virtual std::string getTypeName(const Type& type); + + void writeStructDefinition(const StructDefinition& s); + + void writeType(const Type& type); + + void writeExtension(std::string_view name, bool require = true); + + void writeInterfaceBlock(const InterfaceBlock& intf); + + void writeFunctionDeclaration(const FunctionDeclaration& f); + + void writeFunctionPrototype(const FunctionPrototype& f); + + virtual void writeFunction(const FunctionDefinition& f); + + void writeLayout(const Layout& layout); + + void writeModifiers(const Modifiers& modifiers, bool globalContext); + + virtual void writeInputVars(); + + virtual void writeVarInitializer(const Variable& var, const Expression& value); + + const char* getTypePrecision(const Type& type); + + void writeTypePrecision(const Type& type); + + void writeVarDeclaration(const VarDeclaration& var, bool global); + + void writeFragCoord(); + + virtual void writeVariableReference(const VariableReference& ref); + + void writeExpression(const Expression& expr, Precedence parentPrecedence); + + void writeIntrinsicCall(const FunctionCall& c); + + void writeMinAbsHack(Expression& absExpr, Expression& otherExpr); + + void writeDeterminantHack(const Expression& mat); + + void writeInverseHack(const Expression& mat); + + void writeTransposeHack(const Expression& mat); + + void writeInverseSqrtHack(const Expression& x); + + void writeMatrixComparisonWorkaround(const BinaryExpression& x); + + virtual void writeFunctionCall(const FunctionCall& c); + + void writeConstructorCompound(const ConstructorCompound& c, Precedence parentPrecedence); + + void writeConstructorDiagonalMatrix(const ConstructorDiagonalMatrix& c, + Precedence parentPrecedence); + + virtual void writeAnyConstructor(const AnyConstructor& c, Precedence parentPrecedence); + + virtual void writeCastConstructor(const AnyConstructor& c, Precedence parentPrecedence); + + virtual void writeFieldAccess(const FieldAccess& f); + + virtual void writeSwizzle(const Swizzle& swizzle); + + virtual void writeBinaryExpression(const BinaryExpression& b, Precedence parentPrecedence); + + void writeShortCircuitWorkaroundExpression(const BinaryExpression& b, + Precedence parentPrecedence); + + virtual void writeTernaryExpression(const TernaryExpression& t, Precedence parentPrecedence); + + virtual void writeIndexExpression(const IndexExpression& expr); + + void writePrefixExpression(const PrefixExpression& p, Precedence parentPrecedence); + + void writePostfixExpression(const PostfixExpression& p, Precedence parentPrecedence); + + virtual void writeLiteral(const Literal& l); + + void writeStatement(const Statement& s); + + void writeBlock(const Block& b); + + virtual void writeIfStatement(const IfStatement& stmt); + + void writeForStatement(const ForStatement& f); + + void writeDoStatement(const DoStatement& d); + + void writeExpressionStatement(const ExpressionStatement& s); + + virtual void writeSwitchStatement(const SwitchStatement& s); + + virtual void writeReturnStatement(const ReturnStatement& r); + + virtual void writeProgramElement(const ProgramElement& e); + + const ShaderCaps& caps() const { return *fContext.fCaps; } + + StringStream fExtensions; + StringStream fGlobals; + StringStream fExtraFunctions; + std::string fFunctionHeader; + int fVarCount = 0; + int fIndentation = 0; + bool fAtLineStart = false; + // true if we have run into usages of dFdx / dFdy + bool fFoundDerivatives = false; + bool fFoundExternalSamplerDecl = false; + bool fFoundRectSamplerDecl = false; + bool fSetupClockwise = false; + bool fSetupFragPosition = false; + bool fSetupFragCoordWorkaround = false; + + // Workaround/polyfill flags + bool fWrittenAbsEmulation = false; + bool fWrittenDeterminant2 = false, fWrittenDeterminant3 = false, fWrittenDeterminant4 = false; + bool fWrittenInverse2 = false, fWrittenInverse3 = false, fWrittenInverse4 = false; + bool fWrittenTranspose[3][3] = {}; + + using INHERITED = CodeGenerator; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLMetalCodeGenerator.cpp b/gfx/skia/skia/src/sksl/codegen/SkSLMetalCodeGenerator.cpp new file mode 100644 index 0000000000..d173fae687 --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLMetalCodeGenerator.cpp @@ -0,0 +1,3226 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/codegen/SkSLMetalCodeGenerator.h" + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLLayout.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLStatement.h" +#include "include/private/SkSLString.h" +#include "include/private/base/SkTo.h" +#include "include/sksl/SkSLErrorReporter.h" +#include "include/sksl/SkSLOperator.h" +#include "include/sksl/SkSLPosition.h" +#include "src/base/SkScopeExit.h" +#include "src/sksl/SkSLAnalysis.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLContext.h" +#include "src/sksl/SkSLIntrinsicList.h" +#include "src/sksl/SkSLMemoryLayout.h" +#include "src/sksl/SkSLOutputStream.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/SkSLUtil.h" +#include "src/sksl/analysis/SkSLProgramVisitor.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLBlock.h" +#include "src/sksl/ir/SkSLConstructor.h" +#include "src/sksl/ir/SkSLConstructorArrayCast.h" +#include "src/sksl/ir/SkSLConstructorCompound.h" +#include "src/sksl/ir/SkSLConstructorMatrixResize.h" +#include "src/sksl/ir/SkSLDoStatement.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLExpressionStatement.h" +#include "src/sksl/ir/SkSLExtension.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLFunctionPrototype.h" +#include "src/sksl/ir/SkSLIfStatement.h" +#include "src/sksl/ir/SkSLIndexExpression.h" +#include "src/sksl/ir/SkSLInterfaceBlock.h" +#include "src/sksl/ir/SkSLLiteral.h" +#include "src/sksl/ir/SkSLModifiersDeclaration.h" +#include "src/sksl/ir/SkSLNop.h" +#include "src/sksl/ir/SkSLPostfixExpression.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLReturnStatement.h" +#include "src/sksl/ir/SkSLSetting.h" +#include "src/sksl/ir/SkSLStructDefinition.h" +#include "src/sksl/ir/SkSLSwitchCase.h" +#include "src/sksl/ir/SkSLSwitchStatement.h" +#include "src/sksl/ir/SkSLSwizzle.h" +#include "src/sksl/ir/SkSLTernaryExpression.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" +#include "src/sksl/spirv.h" + +#include +#include +#include +#include +#include + +namespace SkSL { + +static const char* operator_name(Operator op) { + switch (op.kind()) { + case Operator::Kind::LOGICALXOR: return " != "; + default: return op.operatorName(); + } +} + +class MetalCodeGenerator::GlobalStructVisitor { +public: + virtual ~GlobalStructVisitor() = default; + virtual void visitInterfaceBlock(const InterfaceBlock& block, std::string_view blockName) {} + virtual void visitTexture(const Type& type, const Modifiers& modifiers, + std::string_view name) {} + virtual void visitSampler(const Type& type, std::string_view name) {} + virtual void visitConstantVariable(const VarDeclaration& decl) {} + virtual void visitNonconstantVariable(const Variable& var, const Expression* value) {} +}; + +class MetalCodeGenerator::ThreadgroupStructVisitor { +public: + virtual ~ThreadgroupStructVisitor() = default; + virtual void visitNonconstantVariable(const Variable& var) = 0; +}; + +void MetalCodeGenerator::write(std::string_view s) { + if (s.empty()) { + return; + } + if (fAtLineStart) { + for (int i = 0; i < fIndentation; i++) { + fOut->writeText(" "); + } + } + fOut->writeText(std::string(s).c_str()); + fAtLineStart = false; +} + +void MetalCodeGenerator::writeLine(std::string_view s) { + this->write(s); + fOut->writeText(fLineEnding); + fAtLineStart = true; +} + +void MetalCodeGenerator::finishLine() { + if (!fAtLineStart) { + this->writeLine(); + } +} + +void MetalCodeGenerator::writeExtension(const Extension& ext) { + this->writeLine("#extension " + std::string(ext.name()) + " : enable"); +} + +std::string MetalCodeGenerator::typeName(const Type& type) { + // we need to know the modifiers for textures + switch (type.typeKind()) { + case Type::TypeKind::kArray: + SkASSERT(!type.isUnsizedArray()); + SkASSERTF(type.columns() > 0, "invalid array size: %s", type.description().c_str()); + return String::printf("array<%s, %d>", + this->typeName(type.componentType()).c_str(), type.columns()); + + case Type::TypeKind::kVector: + return this->typeName(type.componentType()) + std::to_string(type.columns()); + + case Type::TypeKind::kMatrix: + return this->typeName(type.componentType()) + std::to_string(type.columns()) + "x" + + std::to_string(type.rows()); + + case Type::TypeKind::kSampler: + if (type.dimensions() != SpvDim2D) { + fContext.fErrors->error(Position(), "Unsupported texture dimensions"); + } + return "sampler2D"; + + case Type::TypeKind::kTexture: + switch (type.textureAccess()) { + case Type::TextureAccess::kSample: return "texture2d"; + case Type::TextureAccess::kRead: return "texture2d"; + case Type::TextureAccess::kWrite: return "texture2d"; + case Type::TextureAccess::kReadWrite: return "texture2d"; + default: break; + } + SkUNREACHABLE; + case Type::TypeKind::kAtomic: + // SkSL currently only supports the atomicUint type. + SkASSERT(type.matches(*fContext.fTypes.fAtomicUInt)); + return "atomic_uint"; + default: + return std::string(type.name()); + } +} + +void MetalCodeGenerator::writeStructDefinition(const StructDefinition& s) { + const Type& type = s.type(); + this->writeLine("struct " + type.displayName() + " {"); + fIndentation++; + this->writeFields(type.fields(), type.fPosition); + fIndentation--; + this->writeLine("};"); +} + +void MetalCodeGenerator::writeType(const Type& type) { + this->write(this->typeName(type)); +} + +void MetalCodeGenerator::writeExpression(const Expression& expr, Precedence parentPrecedence) { + switch (expr.kind()) { + case Expression::Kind::kBinary: + this->writeBinaryExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorStruct: + this->writeAnyConstructor(expr.asAnyConstructor(), "{", "}", parentPrecedence); + break; + case Expression::Kind::kConstructorArrayCast: + this->writeConstructorArrayCast(expr.as(), parentPrecedence); + break; + case Expression::Kind::kConstructorCompound: + this->writeConstructorCompound(expr.as(), parentPrecedence); + break; + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorSplat: + this->writeAnyConstructor(expr.asAnyConstructor(), "(", ")", parentPrecedence); + break; + case Expression::Kind::kConstructorMatrixResize: + this->writeConstructorMatrixResize(expr.as(), + parentPrecedence); + break; + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorCompoundCast: + this->writeCastConstructor(expr.asAnyConstructor(), "(", ")", parentPrecedence); + break; + case Expression::Kind::kFieldAccess: + this->writeFieldAccess(expr.as()); + break; + case Expression::Kind::kLiteral: + this->writeLiteral(expr.as()); + break; + case Expression::Kind::kFunctionCall: + this->writeFunctionCall(expr.as()); + break; + case Expression::Kind::kPrefix: + this->writePrefixExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kPostfix: + this->writePostfixExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kSetting: + this->writeExpression(*expr.as().toLiteral(fContext), parentPrecedence); + break; + case Expression::Kind::kSwizzle: + this->writeSwizzle(expr.as()); + break; + case Expression::Kind::kVariableReference: + this->writeVariableReference(expr.as()); + break; + case Expression::Kind::kTernary: + this->writeTernaryExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kIndex: + this->writeIndexExpression(expr.as()); + break; + default: + SkDEBUGFAILF("unsupported expression: %s", expr.description().c_str()); + break; + } +} + +// returns true if we should pass by reference instead of by value +static bool pass_by_reference(const Type& type, const Modifiers& modifiers) { + return (modifiers.fFlags & Modifiers::kOut_Flag) && !type.isUnsizedArray(); +} + +// returns true if we need to specify an address space modifier +static bool needs_address_space(const Type& type, const Modifiers& modifiers) { + return type.isUnsizedArray() || pass_by_reference(type, modifiers); +} + +// returns true if the InterfaceBlock has the `buffer` modifier +static bool is_buffer(const InterfaceBlock& block) { + return block.var()->modifiers().fFlags & Modifiers::kBuffer_Flag; +} + +// returns true if the InterfaceBlock has the `readonly` modifier +static bool is_readonly(const InterfaceBlock& block) { + return block.var()->modifiers().fFlags & Modifiers::kReadOnly_Flag; +} + +std::string MetalCodeGenerator::getOutParamHelper(const FunctionCall& call, + const ExpressionArray& arguments, + const SkTArray& outVars) { + // It's possible for out-param function arguments to contain an out-param function call + // expression. Emit the function into a temporary stream to prevent the nested helper from + // clobbering the current helper as we recursively evaluate argument expressions. + StringStream tmpStream; + AutoOutputStream outputToExtraFunctions(this, &tmpStream, &fIndentation); + + const FunctionDeclaration& function = call.function(); + + std::string name = "_skOutParamHelper" + std::to_string(fSwizzleHelperCount++) + + "_" + function.mangledName(); + const char* separator = ""; + + // Emit a prototype for the function we'll be calling through to in our helper. + if (!function.isBuiltin()) { + this->writeFunctionDeclaration(function); + this->writeLine(";"); + } + + // Synthesize a helper function that takes the same inputs as `function`, except in places where + // `outVars` is non-null; in those places, we take the type of the VariableReference. + // + // float _skOutParamHelper0_originalFuncName(float _var0, float _var1, float& outParam) { + this->writeType(call.type()); + this->write(" "); + this->write(name); + this->write("("); + this->writeFunctionRequirementParams(function, separator); + + SkASSERT(outVars.size() == arguments.size()); + SkASSERT(SkToSizeT(outVars.size()) == function.parameters().size()); + + // We need to detect cases where the caller passes the same variable as an out-param more than + // once, and avoid reusing the variable name. (In those cases we can actually just ignore the + // redundant input parameter entirely, and not give it any name.) + SkTHashSet writtenVars; + + for (int index = 0; index < arguments.size(); ++index) { + this->write(separator); + separator = ", "; + + const Variable* param = function.parameters()[index]; + this->writeModifiers(param->modifiers()); + + const Type* type = outVars[index] ? &outVars[index]->type() : &arguments[index]->type(); + this->writeType(*type); + + if (pass_by_reference(param->type(), param->modifiers())) { + this->write("&"); + } + if (outVars[index]) { + const Variable* var = outVars[index]->variable(); + if (!writtenVars.contains(var)) { + writtenVars.add(var); + + this->write(" "); + fIgnoreVariableReferenceModifiers = true; + this->writeVariableReference(*outVars[index]); + fIgnoreVariableReferenceModifiers = false; + } + } else { + this->write(" _var"); + this->write(std::to_string(index)); + } + } + this->writeLine(") {"); + + ++fIndentation; + for (int index = 0; index < outVars.size(); ++index) { + if (!outVars[index]) { + continue; + } + // float3 _var2[ = outParam.zyx]; + this->writeType(arguments[index]->type()); + this->write(" _var"); + this->write(std::to_string(index)); + + const Variable* param = function.parameters()[index]; + if (param->modifiers().fFlags & Modifiers::kIn_Flag) { + this->write(" = "); + fIgnoreVariableReferenceModifiers = true; + this->writeExpression(*arguments[index], Precedence::kAssignment); + fIgnoreVariableReferenceModifiers = false; + } + + this->writeLine(";"); + } + + // [int _skResult = ] myFunction(inputs, outputs, _globals, _var0, _var1, _var2, _var3); + bool hasResult = (call.type().name() != "void"); + if (hasResult) { + this->writeType(call.type()); + this->write(" _skResult = "); + } + + this->writeName(function.mangledName()); + this->write("("); + separator = ""; + this->writeFunctionRequirementArgs(function, separator); + + for (int index = 0; index < arguments.size(); ++index) { + this->write(separator); + separator = ", "; + + this->write("_var"); + this->write(std::to_string(index)); + } + this->writeLine(");"); + + for (int index = 0; index < outVars.size(); ++index) { + if (!outVars[index]) { + continue; + } + // outParam.zyx = _var2; + fIgnoreVariableReferenceModifiers = true; + this->writeExpression(*arguments[index], Precedence::kAssignment); + fIgnoreVariableReferenceModifiers = false; + this->write(" = _var"); + this->write(std::to_string(index)); + this->writeLine(";"); + } + + if (hasResult) { + this->writeLine("return _skResult;"); + } + + --fIndentation; + this->writeLine("}"); + + // Write the function out to `fExtraFunctions`. + write_stringstream(tmpStream, fExtraFunctions); + + return name; +} + +std::string MetalCodeGenerator::getBitcastIntrinsic(const Type& outType) { + return "as_type<" + outType.displayName() + ">"; +} + +void MetalCodeGenerator::writeFunctionCall(const FunctionCall& c) { + const FunctionDeclaration& function = c.function(); + + // Many intrinsics need to be rewritten in Metal. + if (function.isIntrinsic()) { + if (this->writeIntrinsicCall(c, function.intrinsicKind())) { + return; + } + } + + // Determine whether or not we need to emulate GLSL's out-param semantics for Metal using a + // helper function. (Specifically, out-parameters in GLSL are only written back to the original + // variable at the end of the function call; also, swizzles are supported, whereas Metal doesn't + // allow a swizzle to be passed to a `floatN&`.) + const ExpressionArray& arguments = c.arguments(); + const std::vector& parameters = function.parameters(); + SkASSERT(SkToSizeT(arguments.size()) == parameters.size()); + + bool foundOutParam = false; + SkSTArray<16, VariableReference*> outVars; + outVars.push_back_n(arguments.size(), (VariableReference*)nullptr); + + for (int index = 0; index < arguments.size(); ++index) { + // If this is an out parameter... + if (parameters[index]->modifiers().fFlags & Modifiers::kOut_Flag) { + // Find the expression's inner variable being written to. + Analysis::AssignmentInfo info; + // Assignability was verified at IRGeneration time, so this should always succeed. + SkAssertResult(Analysis::IsAssignable(*arguments[index], &info)); + outVars[index] = info.fAssignedVar; + foundOutParam = true; + } + } + + if (foundOutParam) { + // Out parameters need to be written back to at the end of the function. To do this, we + // synthesize a helper function which evaluates the out-param expression into a temporary + // variable, calls the original function, then writes the temp var back into the out param + // using the original out-param expression. (This lets us support things like swizzles and + // array indices.) + this->write(getOutParamHelper(c, arguments, outVars)); + } else { + this->write(function.mangledName()); + } + + this->write("("); + const char* separator = ""; + this->writeFunctionRequirementArgs(function, separator); + for (int i = 0; i < arguments.size(); ++i) { + this->write(separator); + separator = ", "; + + if (outVars[i]) { + this->writeExpression(*outVars[i], Precedence::kSequence); + } else { + this->writeExpression(*arguments[i], Precedence::kSequence); + } + } + this->write(")"); +} + +static constexpr char kInverse2x2[] = R"( +template +matrix mat2_inverse(matrix m) { +return matrix(m[1].y, -m[0].y, -m[1].x, m[0].x) * (1/determinant(m)); +} +)"; + +static constexpr char kInverse3x3[] = R"( +template +matrix mat3_inverse(matrix m) { +T + a00 = m[0].x, a01 = m[0].y, a02 = m[0].z, + a10 = m[1].x, a11 = m[1].y, a12 = m[1].z, + a20 = m[2].x, a21 = m[2].y, a22 = m[2].z, + b01 = a22*a11 - a12*a21, + b11 = -a22*a10 + a12*a20, + b21 = a21*a10 - a11*a20, + det = a00*b01 + a01*b11 + a02*b21; +return matrix( + b01, (-a22*a01 + a02*a21), ( a12*a01 - a02*a11), + b11, ( a22*a00 - a02*a20), (-a12*a00 + a02*a10), + b21, (-a21*a00 + a01*a20), ( a11*a00 - a01*a10)) * (1/det); +} +)"; + +static constexpr char kInverse4x4[] = R"( +template +matrix mat4_inverse(matrix m) { +T + a00 = m[0].x, a01 = m[0].y, a02 = m[0].z, a03 = m[0].w, + a10 = m[1].x, a11 = m[1].y, a12 = m[1].z, a13 = m[1].w, + a20 = m[2].x, a21 = m[2].y, a22 = m[2].z, a23 = m[2].w, + a30 = m[3].x, a31 = m[3].y, a32 = m[3].z, a33 = m[3].w, + b00 = a00*a11 - a01*a10, + b01 = a00*a12 - a02*a10, + b02 = a00*a13 - a03*a10, + b03 = a01*a12 - a02*a11, + b04 = a01*a13 - a03*a11, + b05 = a02*a13 - a03*a12, + b06 = a20*a31 - a21*a30, + b07 = a20*a32 - a22*a30, + b08 = a20*a33 - a23*a30, + b09 = a21*a32 - a22*a31, + b10 = a21*a33 - a23*a31, + b11 = a22*a33 - a23*a32, + det = b00*b11 - b01*b10 + b02*b09 + b03*b08 - b04*b07 + b05*b06; +return matrix( + a11*b11 - a12*b10 + a13*b09, + a02*b10 - a01*b11 - a03*b09, + a31*b05 - a32*b04 + a33*b03, + a22*b04 - a21*b05 - a23*b03, + a12*b08 - a10*b11 - a13*b07, + a00*b11 - a02*b08 + a03*b07, + a32*b02 - a30*b05 - a33*b01, + a20*b05 - a22*b02 + a23*b01, + a10*b10 - a11*b08 + a13*b06, + a01*b08 - a00*b10 - a03*b06, + a30*b04 - a31*b02 + a33*b00, + a21*b02 - a20*b04 - a23*b00, + a11*b07 - a10*b09 - a12*b06, + a00*b09 - a01*b07 + a02*b06, + a31*b01 - a30*b03 - a32*b00, + a20*b03 - a21*b01 + a22*b00) * (1/det); +} +)"; + +std::string MetalCodeGenerator::getInversePolyfill(const ExpressionArray& arguments) { + // Only use polyfills for a function taking a single-argument square matrix. + SkASSERT(arguments.size() == 1); + const Type& type = arguments.front()->type(); + if (type.isMatrix() && type.rows() == type.columns()) { + switch (type.rows()) { + case 2: + if (!fWrittenInverse2) { + fWrittenInverse2 = true; + fExtraFunctions.writeText(kInverse2x2); + } + return "mat2_inverse"; + case 3: + if (!fWrittenInverse3) { + fWrittenInverse3 = true; + fExtraFunctions.writeText(kInverse3x3); + } + return "mat3_inverse"; + case 4: + if (!fWrittenInverse4) { + fWrittenInverse4 = true; + fExtraFunctions.writeText(kInverse4x4); + } + return "mat4_inverse"; + } + } + SkDEBUGFAILF("no polyfill for inverse(%s)", type.description().c_str()); + return "inverse"; +} + +void MetalCodeGenerator::writeMatrixCompMult() { + static constexpr char kMatrixCompMult[] = R"( +template +matrix matrixCompMult(matrix a, const matrix b) { + for (int c = 0; c < C; ++c) { a[c] *= b[c]; } + return a; +} +)"; + if (!fWrittenMatrixCompMult) { + fWrittenMatrixCompMult = true; + fExtraFunctions.writeText(kMatrixCompMult); + } +} + +void MetalCodeGenerator::writeOuterProduct() { + static constexpr char kOuterProduct[] = R"( +template +matrix outerProduct(const vec a, const vec b) { + matrix m; + for (int c = 0; c < C; ++c) { m[c] = a * b[c]; } + return m; +} +)"; + if (!fWrittenOuterProduct) { + fWrittenOuterProduct = true; + fExtraFunctions.writeText(kOuterProduct); + } +} + +std::string MetalCodeGenerator::getTempVariable(const Type& type) { + std::string tempVar = "_skTemp" + std::to_string(fVarCount++); + this->fFunctionHeader += " " + this->typeName(type) + " " + tempVar + ";\n"; + return tempVar; +} + +void MetalCodeGenerator::writeSimpleIntrinsic(const FunctionCall& c) { + // Write out an intrinsic function call exactly as-is. No muss no fuss. + this->write(c.function().name()); + this->writeArgumentList(c.arguments()); +} + +void MetalCodeGenerator::writeArgumentList(const ExpressionArray& arguments) { + this->write("("); + const char* separator = ""; + for (const std::unique_ptr& arg : arguments) { + this->write(separator); + separator = ", "; + this->writeExpression(*arg, Precedence::kSequence); + } + this->write(")"); +} + +bool MetalCodeGenerator::writeIntrinsicCall(const FunctionCall& c, IntrinsicKind kind) { + const ExpressionArray& arguments = c.arguments(); + switch (kind) { + case k_read_IntrinsicKind: { + this->writeExpression(*arguments[0], Precedence::kTopLevel); + this->write(".read("); + this->writeExpression(*arguments[1], Precedence::kSequence); + this->write(")"); + return true; + } + case k_write_IntrinsicKind: { + this->writeExpression(*arguments[0], Precedence::kTopLevel); + this->write(".write("); + this->writeExpression(*arguments[2], Precedence::kSequence); + this->write(", "); + this->writeExpression(*arguments[1], Precedence::kSequence); + this->write(")"); + return true; + } + case k_width_IntrinsicKind: { + this->writeExpression(*arguments[0], Precedence::kTopLevel); + this->write(".get_width()"); + return true; + } + case k_height_IntrinsicKind: { + this->writeExpression(*arguments[0], Precedence::kTopLevel); + this->write(".get_height()"); + return true; + } + case k_mod_IntrinsicKind: { + // fmod(x, y) in metal calculates x - y * trunc(x / y) instead of x - y * floor(x / y) + std::string tmpX = this->getTempVariable(arguments[0]->type()); + std::string tmpY = this->getTempVariable(arguments[1]->type()); + this->write("(" + tmpX + " = "); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(", " + tmpY + " = "); + this->writeExpression(*arguments[1], Precedence::kSequence); + this->write(", " + tmpX + " - " + tmpY + " * floor(" + tmpX + " / " + tmpY + "))"); + return true; + } + // GLSL declares scalar versions of most geometric intrinsics, but these don't exist in MSL + case k_distance_IntrinsicKind: { + if (arguments[0]->type().columns() == 1) { + this->write("abs("); + this->writeExpression(*arguments[0], Precedence::kAdditive); + this->write(" - "); + this->writeExpression(*arguments[1], Precedence::kAdditive); + this->write(")"); + } else { + this->writeSimpleIntrinsic(c); + } + return true; + } + case k_dot_IntrinsicKind: { + if (arguments[0]->type().columns() == 1) { + this->write("("); + this->writeExpression(*arguments[0], Precedence::kMultiplicative); + this->write(" * "); + this->writeExpression(*arguments[1], Precedence::kMultiplicative); + this->write(")"); + } else { + this->writeSimpleIntrinsic(c); + } + return true; + } + case k_faceforward_IntrinsicKind: { + if (arguments[0]->type().columns() == 1) { + // ((((Nref) * (I) < 0) ? 1 : -1) * (N)) + this->write("(((("); + this->writeExpression(*arguments[2], Precedence::kSequence); + this->write(") * ("); + this->writeExpression(*arguments[1], Precedence::kSequence); + this->write(") < 0) ? 1 : -1) * ("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("))"); + } else { + this->writeSimpleIntrinsic(c); + } + return true; + } + case k_length_IntrinsicKind: { + this->write(arguments[0]->type().columns() == 1 ? "abs(" : "length("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_normalize_IntrinsicKind: { + this->write(arguments[0]->type().columns() == 1 ? "sign(" : "normalize("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_packUnorm2x16_IntrinsicKind: { + this->write("pack_float_to_unorm2x16("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_unpackUnorm2x16_IntrinsicKind: { + this->write("unpack_unorm2x16_to_float("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_packSnorm2x16_IntrinsicKind: { + this->write("pack_float_to_snorm2x16("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_unpackSnorm2x16_IntrinsicKind: { + this->write("unpack_snorm2x16_to_float("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_packUnorm4x8_IntrinsicKind: { + this->write("pack_float_to_unorm4x8("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_unpackUnorm4x8_IntrinsicKind: { + this->write("unpack_unorm4x8_to_float("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_packSnorm4x8_IntrinsicKind: { + this->write("pack_float_to_snorm4x8("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_unpackSnorm4x8_IntrinsicKind: { + this->write("unpack_snorm4x8_to_float("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_packHalf2x16_IntrinsicKind: { + this->write("as_type(half2("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("))"); + return true; + } + case k_unpackHalf2x16_IntrinsicKind: { + this->write("float2(as_type("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("))"); + return true; + } + case k_floatBitsToInt_IntrinsicKind: + case k_floatBitsToUint_IntrinsicKind: + case k_intBitsToFloat_IntrinsicKind: + case k_uintBitsToFloat_IntrinsicKind: { + this->write(this->getBitcastIntrinsic(c.type())); + this->write("("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_degrees_IntrinsicKind: { + this->write("(("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(") * 57.2957795)"); + return true; + } + case k_radians_IntrinsicKind: { + this->write("(("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(") * 0.0174532925)"); + return true; + } + case k_dFdx_IntrinsicKind: { + this->write("dfdx"); + this->writeArgumentList(c.arguments()); + return true; + } + case k_dFdy_IntrinsicKind: { + if (!fRTFlipName.empty()) { + this->write("(" + fRTFlipName + ".y * dfdy"); + } else { + this->write("(dfdy"); + } + this->writeArgumentList(c.arguments()); + this->write(")"); + return true; + } + case k_inverse_IntrinsicKind: { + this->write(this->getInversePolyfill(arguments)); + this->writeArgumentList(c.arguments()); + return true; + } + case k_inversesqrt_IntrinsicKind: { + this->write("rsqrt"); + this->writeArgumentList(c.arguments()); + return true; + } + case k_atan_IntrinsicKind: { + this->write(c.arguments().size() == 2 ? "atan2" : "atan"); + this->writeArgumentList(c.arguments()); + return true; + } + case k_reflect_IntrinsicKind: { + if (arguments[0]->type().columns() == 1) { + // We need to synthesize `I - 2 * N * I * N`. + std::string tmpI = this->getTempVariable(arguments[0]->type()); + std::string tmpN = this->getTempVariable(arguments[1]->type()); + + // (_skTempI = ... + this->write("(" + tmpI + " = "); + this->writeExpression(*arguments[0], Precedence::kSequence); + + // , _skTempN = ... + this->write(", " + tmpN + " = "); + this->writeExpression(*arguments[1], Precedence::kSequence); + + // , _skTempI - 2 * _skTempN * _skTempI * _skTempN) + this->write(", " + tmpI + " - 2 * " + tmpN + " * " + tmpI + " * " + tmpN + ")"); + } else { + this->writeSimpleIntrinsic(c); + } + return true; + } + case k_refract_IntrinsicKind: { + if (arguments[0]->type().columns() == 1) { + // Metal does implement refract for vectors; rather than reimplementing refract from + // scratch, we can replace the call with `refract(float2(I,0), float2(N,0), eta).x`. + this->write("(refract(float2("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(", 0), float2("); + this->writeExpression(*arguments[1], Precedence::kSequence); + this->write(", 0), "); + this->writeExpression(*arguments[2], Precedence::kSequence); + this->write(").x)"); + } else { + this->writeSimpleIntrinsic(c); + } + return true; + } + case k_roundEven_IntrinsicKind: { + this->write("rint"); + this->writeArgumentList(c.arguments()); + return true; + } + case k_bitCount_IntrinsicKind: { + this->write("popcount("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write(")"); + return true; + } + case k_findLSB_IntrinsicKind: { + // Create a temp variable to store the expression, to avoid double-evaluating it. + std::string skTemp = this->getTempVariable(arguments[0]->type()); + std::string exprType = this->typeName(arguments[0]->type()); + + // ctz returns numbits(type) on zero inputs; GLSL documents it as generating -1 instead. + // Use select to detect zero inputs and force a -1 result. + + // (_skTemp1 = (.....), select(ctz(_skTemp1), int4(-1), _skTemp1 == int4(0))) + this->write("("); + this->write(skTemp); + this->write(" = ("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("), select(ctz("); + this->write(skTemp); + this->write("), "); + this->write(exprType); + this->write("(-1), "); + this->write(skTemp); + this->write(" == "); + this->write(exprType); + this->write("(0)))"); + return true; + } + case k_findMSB_IntrinsicKind: { + // Create a temp variable to store the expression, to avoid double-evaluating it. + std::string skTemp1 = this->getTempVariable(arguments[0]->type()); + std::string exprType = this->typeName(arguments[0]->type()); + + // GLSL findMSB is actually quite different from Metal's clz: + // - For signed negative numbers, it returns the first zero bit, not the first one bit! + // - For an empty input (0/~0 depending on sign), findMSB gives -1; clz is numbits(type) + + // (_skTemp1 = (.....), + this->write("("); + this->write(skTemp1); + this->write(" = ("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("), "); + + // Signed input types might be negative; we need another helper variable to negate the + // input (since we can only find one bits, not zero bits). + std::string skTemp2; + if (arguments[0]->type().isSigned()) { + // ... _skTemp2 = (select(_skTemp1, ~_skTemp1, _skTemp1 < 0)), + skTemp2 = this->getTempVariable(arguments[0]->type()); + this->write(skTemp2); + this->write(" = (select("); + this->write(skTemp1); + this->write(", ~"); + this->write(skTemp1); + this->write(", "); + this->write(skTemp1); + this->write(" < 0)), "); + } else { + skTemp2 = skTemp1; + } + + // ... select(int4(clz(_skTemp2)), int4(-1), _skTemp2 == int4(0))) + this->write("select("); + this->write(this->typeName(c.type())); + this->write("(clz("); + this->write(skTemp2); + this->write(")), "); + this->write(this->typeName(c.type())); + this->write("(-1), "); + this->write(skTemp2); + this->write(" == "); + this->write(exprType); + this->write("(0)))"); + return true; + } + case k_sign_IntrinsicKind: { + if (arguments[0]->type().componentType().isInteger()) { + // Create a temp variable to store the expression, to avoid double-evaluating it. + std::string skTemp = this->getTempVariable(arguments[0]->type()); + std::string exprType = this->typeName(arguments[0]->type()); + + // (_skTemp = (.....), + this->write("("); + this->write(skTemp); + this->write(" = ("); + this->writeExpression(*arguments[0], Precedence::kSequence); + this->write("), "); + + // ... select(select(int4(0), int4(-1), _skTemp < 0), int4(1), _skTemp > 0)) + this->write("select(select("); + this->write(exprType); + this->write("(0), "); + this->write(exprType); + this->write("(-1), "); + this->write(skTemp); + this->write(" < 0), "); + this->write(exprType); + this->write("(1), "); + this->write(skTemp); + this->write(" > 0))"); + } else { + this->writeSimpleIntrinsic(c); + } + return true; + } + case k_matrixCompMult_IntrinsicKind: { + this->writeMatrixCompMult(); + this->writeSimpleIntrinsic(c); + return true; + } + case k_outerProduct_IntrinsicKind: { + this->writeOuterProduct(); + this->writeSimpleIntrinsic(c); + return true; + } + case k_mix_IntrinsicKind: { + SkASSERT(c.arguments().size() == 3); + if (arguments[2]->type().componentType().isBoolean()) { + // The Boolean forms of GLSL mix() use the select() intrinsic in Metal. + this->write("select"); + this->writeArgumentList(c.arguments()); + return true; + } + // The basic form of mix() is supported by Metal as-is. + this->writeSimpleIntrinsic(c); + return true; + } + case k_equal_IntrinsicKind: + case k_greaterThan_IntrinsicKind: + case k_greaterThanEqual_IntrinsicKind: + case k_lessThan_IntrinsicKind: + case k_lessThanEqual_IntrinsicKind: + case k_notEqual_IntrinsicKind: { + this->write("("); + this->writeExpression(*c.arguments()[0], Precedence::kRelational); + switch (kind) { + case k_equal_IntrinsicKind: + this->write(" == "); + break; + case k_notEqual_IntrinsicKind: + this->write(" != "); + break; + case k_lessThan_IntrinsicKind: + this->write(" < "); + break; + case k_lessThanEqual_IntrinsicKind: + this->write(" <= "); + break; + case k_greaterThan_IntrinsicKind: + this->write(" > "); + break; + case k_greaterThanEqual_IntrinsicKind: + this->write(" >= "); + break; + default: + SK_ABORT("unsupported comparison intrinsic kind"); + } + this->writeExpression(*c.arguments()[1], Precedence::kRelational); + this->write(")"); + return true; + } + case k_storageBarrier_IntrinsicKind: + this->write("threadgroup_barrier(mem_flags::mem_device)"); + return true; + case k_workgroupBarrier_IntrinsicKind: + this->write("threadgroup_barrier(mem_flags::mem_threadgroup)"); + return true; + case k_atomicAdd_IntrinsicKind: + this->write("atomic_fetch_add_explicit(&"); + this->writeExpression(*c.arguments()[0], Precedence::kSequence); + this->write(", "); + this->writeExpression(*c.arguments()[1], Precedence::kSequence); + this->write(", memory_order_relaxed)"); + return true; + case k_atomicLoad_IntrinsicKind: + this->write("atomic_load_explicit(&"); + this->writeExpression(*c.arguments()[0], Precedence::kSequence); + this->write(", memory_order_relaxed)"); + return true; + case k_atomicStore_IntrinsicKind: + this->write("atomic_store_explicit(&"); + this->writeExpression(*c.arguments()[0], Precedence::kSequence); + this->write(", "); + this->writeExpression(*c.arguments()[1], Precedence::kSequence); + this->write(", memory_order_relaxed)"); + return true; + default: + return false; + } +} + +// Assembles a matrix of type floatRxC by resizing another matrix named `x0`. +// Cells that don't exist in the source matrix will be populated with identity-matrix values. +void MetalCodeGenerator::assembleMatrixFromMatrix(const Type& sourceMatrix, int rows, int columns) { + SkASSERT(rows <= 4); + SkASSERT(columns <= 4); + + std::string matrixType = this->typeName(sourceMatrix.componentType()); + + const char* separator = ""; + for (int c = 0; c < columns; ++c) { + fExtraFunctions.printf("%s%s%d(", separator, matrixType.c_str(), rows); + separator = "), "; + + // Determine how many values to take from the source matrix for this row. + int swizzleLength = 0; + if (c < sourceMatrix.columns()) { + swizzleLength = std::min<>(rows, sourceMatrix.rows()); + } + + // Emit all the values from the source matrix row. + bool firstItem; + switch (swizzleLength) { + case 0: firstItem = true; break; + case 1: firstItem = false; fExtraFunctions.printf("x0[%d].x", c); break; + case 2: firstItem = false; fExtraFunctions.printf("x0[%d].xy", c); break; + case 3: firstItem = false; fExtraFunctions.printf("x0[%d].xyz", c); break; + case 4: firstItem = false; fExtraFunctions.printf("x0[%d].xyzw", c); break; + default: SkUNREACHABLE; + } + + // Emit the placeholder identity-matrix cells. + for (int r = swizzleLength; r < rows; ++r) { + fExtraFunctions.printf("%s%s", firstItem ? "" : ", ", (r == c) ? "1.0" : "0.0"); + firstItem = false; + } + } + + fExtraFunctions.writeText(")"); +} + +// Assembles a matrix of type floatCxR by concatenating an arbitrary mix of values, named `x0`, +// `x1`, etc. An error is written if the expression list don't contain exactly C*R scalars. +void MetalCodeGenerator::assembleMatrixFromExpressions(const AnyConstructor& ctor, + int columns, int rows) { + SkASSERT(rows <= 4); + SkASSERT(columns <= 4); + + std::string matrixType = this->typeName(ctor.type().componentType()); + size_t argIndex = 0; + int argPosition = 0; + auto args = ctor.argumentSpan(); + + static constexpr char kSwizzle[] = "xyzw"; + const char* separator = ""; + for (int c = 0; c < columns; ++c) { + fExtraFunctions.printf("%s%s%d(", separator, matrixType.c_str(), rows); + separator = "), "; + + const char* columnSeparator = ""; + for (int r = 0; r < rows;) { + fExtraFunctions.writeText(columnSeparator); + columnSeparator = ", "; + + if (argIndex < args.size()) { + const Type& argType = args[argIndex]->type(); + switch (argType.typeKind()) { + case Type::TypeKind::kScalar: { + fExtraFunctions.printf("x%zu", argIndex); + ++r; + ++argPosition; + break; + } + case Type::TypeKind::kVector: { + fExtraFunctions.printf("x%zu.", argIndex); + do { + fExtraFunctions.write8(kSwizzle[argPosition]); + ++r; + ++argPosition; + } while (r < rows && argPosition < argType.columns()); + break; + } + case Type::TypeKind::kMatrix: { + fExtraFunctions.printf("x%zu[%d].", argIndex, argPosition / argType.rows()); + do { + fExtraFunctions.write8(kSwizzle[argPosition]); + ++r; + ++argPosition; + } while (r < rows && (argPosition % argType.rows()) != 0); + break; + } + default: { + SkDEBUGFAIL("incorrect type of argument for matrix constructor"); + fExtraFunctions.writeText(""); + break; + } + } + + if (argPosition >= argType.columns() * argType.rows()) { + ++argIndex; + argPosition = 0; + } + } else { + SkDEBUGFAIL("not enough arguments for matrix constructor"); + fExtraFunctions.writeText(""); + } + } + } + + if (argPosition != 0 || argIndex != args.size()) { + SkDEBUGFAIL("incorrect number of arguments for matrix constructor"); + fExtraFunctions.writeText(", "); + } + + fExtraFunctions.writeText(")"); +} + +// Generates a constructor for 'matrix' which reorganizes the input arguments into the proper shape. +// Keeps track of previously generated constructors so that we won't generate more than one +// constructor for any given permutation of input argument types. Returns the name of the +// generated constructor method. +std::string MetalCodeGenerator::getMatrixConstructHelper(const AnyConstructor& c) { + const Type& type = c.type(); + int columns = type.columns(); + int rows = type.rows(); + auto args = c.argumentSpan(); + std::string typeName = this->typeName(type); + + // Create the helper-method name and use it as our lookup key. + std::string name = String::printf("%s_from", typeName.c_str()); + for (const std::unique_ptr& expr : args) { + String::appendf(&name, "_%s", this->typeName(expr->type()).c_str()); + } + + // If a helper-method has not been synthesized yet, create it now. + if (!fHelpers.contains(name)) { + fHelpers.add(name); + + // Unlike GLSL, Metal requires that matrices are initialized with exactly R vectors of C + // components apiece. (In Metal 2.0, you can also supply R*C scalars, but you still cannot + // supply a mixture of scalars and vectors.) + fExtraFunctions.printf("%s %s(", typeName.c_str(), name.c_str()); + + size_t argIndex = 0; + const char* argSeparator = ""; + for (const std::unique_ptr& expr : args) { + fExtraFunctions.printf("%s%s x%zu", argSeparator, + this->typeName(expr->type()).c_str(), argIndex++); + argSeparator = ", "; + } + + fExtraFunctions.printf(") {\n return %s(", typeName.c_str()); + + if (args.size() == 1 && args.front()->type().isMatrix()) { + this->assembleMatrixFromMatrix(args.front()->type(), rows, columns); + } else { + this->assembleMatrixFromExpressions(c, columns, rows); + } + + fExtraFunctions.writeText(");\n}\n"); + } + return name; +} + +bool MetalCodeGenerator::matrixConstructHelperIsNeeded(const ConstructorCompound& c) { + SkASSERT(c.type().isMatrix()); + + // GLSL is fairly free-form about inputs to its matrix constructors, but Metal is not; it + // expects exactly R vectors of C components apiece. (Metal 2.0 also allows a list of R*C + // scalars.) Some cases are simple to translate and so we handle those inline--e.g. a list of + // scalars can be constructed trivially. In more complex cases, we generate a helper function + // that converts our inputs into a properly-shaped matrix. + // A matrix construct helper method is always used if any input argument is a matrix. + // Helper methods are also necessary when any argument would span multiple rows. For instance: + // + // float2 x = (1, 2); + // float3x2(x, 3, 4, 5, 6) = | 1 3 5 | = no helper needed; conversion can be done inline + // | 2 4 6 | + // + // float2 x = (2, 3); + // float3x2(1, x, 4, 5, 6) = | 1 3 5 | = x spans multiple rows; a helper method will be used + // | 2 4 6 | + // + // float4 x = (1, 2, 3, 4); + // float2x2(x) = | 1 3 | = x spans multiple rows; a helper method will be used + // | 2 4 | + // + + int position = 0; + for (const std::unique_ptr& expr : c.arguments()) { + // If an input argument is a matrix, we need a helper function. + if (expr->type().isMatrix()) { + return true; + } + position += expr->type().columns(); + if (position > c.type().rows()) { + // An input argument would span multiple rows; a helper function is required. + return true; + } + if (position == c.type().rows()) { + // We've advanced to the end of a row. Wrap to the start of the next row. + position = 0; + } + } + + return false; +} + +void MetalCodeGenerator::writeConstructorMatrixResize(const ConstructorMatrixResize& c, + Precedence parentPrecedence) { + // Matrix-resize via casting doesn't natively exist in Metal at all, so we always need to use a + // matrix-construct helper here. + this->write(this->getMatrixConstructHelper(c)); + this->write("("); + this->writeExpression(*c.argument(), Precedence::kSequence); + this->write(")"); +} + +void MetalCodeGenerator::writeConstructorCompound(const ConstructorCompound& c, + Precedence parentPrecedence) { + if (c.type().isVector()) { + this->writeConstructorCompoundVector(c, parentPrecedence); + } else if (c.type().isMatrix()) { + this->writeConstructorCompoundMatrix(c, parentPrecedence); + } else { + fContext.fErrors->error(c.fPosition, "unsupported compound constructor"); + } +} + +void MetalCodeGenerator::writeConstructorArrayCast(const ConstructorArrayCast& c, + Precedence parentPrecedence) { + const Type& inType = c.argument()->type().componentType(); + const Type& outType = c.type().componentType(); + std::string inTypeName = this->typeName(inType); + std::string outTypeName = this->typeName(outType); + + std::string name = "array_of_" + outTypeName + "_from_" + inTypeName; + if (!fHelpers.contains(name)) { + fHelpers.add(name); + fExtraFunctions.printf(R"( +template +array<%s, N> %s(thread const array<%s, N>& x) { + array<%s, N> result; + for (int i = 0; i < N; ++i) { + result[i] = %s(x[i]); + } + return result; +} +)", + outTypeName.c_str(), name.c_str(), inTypeName.c_str(), + outTypeName.c_str(), + outTypeName.c_str()); + } + + this->write(name); + this->write("("); + this->writeExpression(*c.argument(), Precedence::kSequence); + this->write(")"); +} + +std::string MetalCodeGenerator::getVectorFromMat2x2ConstructorHelper(const Type& matrixType) { + SkASSERT(matrixType.isMatrix()); + SkASSERT(matrixType.rows() == 2); + SkASSERT(matrixType.columns() == 2); + + std::string baseType = this->typeName(matrixType.componentType()); + std::string name = String::printf("%s4_from_%s2x2", baseType.c_str(), baseType.c_str()); + if (!fHelpers.contains(name)) { + fHelpers.add(name); + + fExtraFunctions.printf(R"( +%s4 %s(%s2x2 x) { + return %s4(x[0].xy, x[1].xy); +} +)", baseType.c_str(), name.c_str(), baseType.c_str(), baseType.c_str()); + } + + return name; +} + +void MetalCodeGenerator::writeConstructorCompoundVector(const ConstructorCompound& c, + Precedence parentPrecedence) { + SkASSERT(c.type().isVector()); + + // Metal supports constructing vectors from a mix of scalars and vectors, but not matrices. + // GLSL supports vec4(mat2x2), so we detect that case here and emit a helper function. + if (c.type().columns() == 4 && c.argumentSpan().size() == 1) { + const Expression& expr = *c.argumentSpan().front(); + if (expr.type().isMatrix()) { + this->write(this->getVectorFromMat2x2ConstructorHelper(expr.type())); + this->write("("); + this->writeExpression(expr, Precedence::kSequence); + this->write(")"); + return; + } + } + + this->writeAnyConstructor(c, "(", ")", parentPrecedence); +} + +void MetalCodeGenerator::writeConstructorCompoundMatrix(const ConstructorCompound& c, + Precedence parentPrecedence) { + SkASSERT(c.type().isMatrix()); + + // Emit and invoke a matrix-constructor helper method if one is necessary. + if (this->matrixConstructHelperIsNeeded(c)) { + this->write(this->getMatrixConstructHelper(c)); + this->write("("); + const char* separator = ""; + for (const std::unique_ptr& expr : c.arguments()) { + this->write(separator); + separator = ", "; + this->writeExpression(*expr, Precedence::kSequence); + } + this->write(")"); + return; + } + + // Metal doesn't allow creating matrices by passing in scalars and vectors in a jumble; it + // requires your scalars to be grouped up into columns. Because `matrixConstructHelperIsNeeded` + // returned false, we know that none of our scalars/vectors "wrap" across across a column, so we + // can group our inputs up and synthesize a constructor for each column. + const Type& matrixType = c.type(); + const Type& columnType = matrixType.componentType().toCompound( + fContext, /*columns=*/matrixType.rows(), /*rows=*/1); + + this->writeType(matrixType); + this->write("("); + const char* separator = ""; + int scalarCount = 0; + for (const std::unique_ptr& arg : c.arguments()) { + this->write(separator); + separator = ", "; + if (arg->type().columns() < matrixType.rows()) { + // Write a `floatN(` constructor to group scalars and smaller vectors together. + if (!scalarCount) { + this->writeType(columnType); + this->write("("); + } + scalarCount += arg->type().columns(); + } + this->writeExpression(*arg, Precedence::kSequence); + if (scalarCount && scalarCount == matrixType.rows()) { + // Close our `floatN(...` constructor block from above. + this->write(")"); + scalarCount = 0; + } + } + this->write(")"); +} + +void MetalCodeGenerator::writeAnyConstructor(const AnyConstructor& c, + const char* leftBracket, + const char* rightBracket, + Precedence parentPrecedence) { + this->writeType(c.type()); + this->write(leftBracket); + const char* separator = ""; + for (const std::unique_ptr& arg : c.argumentSpan()) { + this->write(separator); + separator = ", "; + this->writeExpression(*arg, Precedence::kSequence); + } + this->write(rightBracket); +} + +void MetalCodeGenerator::writeCastConstructor(const AnyConstructor& c, + const char* leftBracket, + const char* rightBracket, + Precedence parentPrecedence) { + return this->writeAnyConstructor(c, leftBracket, rightBracket, parentPrecedence); +} + +void MetalCodeGenerator::writeFragCoord() { + if (!fRTFlipName.empty()) { + this->write("float4(_fragCoord.x, "); + this->write(fRTFlipName.c_str()); + this->write(".x + "); + this->write(fRTFlipName.c_str()); + this->write(".y * _fragCoord.y, 0.0, _fragCoord.w)"); + } else { + this->write("float4(_fragCoord.x, _fragCoord.y, 0.0, _fragCoord.w)"); + } +} + +static bool is_compute_builtin(const Variable& var) { + switch (var.modifiers().fLayout.fBuiltin) { + case SK_NUMWORKGROUPS_BUILTIN: + case SK_WORKGROUPID_BUILTIN: + case SK_LOCALINVOCATIONID_BUILTIN: + case SK_GLOBALINVOCATIONID_BUILTIN: + case SK_LOCALINVOCATIONINDEX_BUILTIN: + return true; + default: + break; + } + return false; +} + +// true if the var is part of the Inputs struct +static bool is_input(const Variable& var) { + SkASSERT(var.storage() == VariableStorage::kGlobal); + return var.modifiers().fFlags & Modifiers::kIn_Flag && + (var.modifiers().fLayout.fBuiltin == -1 || is_compute_builtin(var)) && + var.type().typeKind() != Type::TypeKind::kTexture; +} + +// true if the var is part of the Outputs struct +static bool is_output(const Variable& var) { + SkASSERT(var.storage() == VariableStorage::kGlobal); + // inout vars get written into the Inputs struct, so we exclude them from Outputs + return (var.modifiers().fFlags & Modifiers::kOut_Flag) && + !(var.modifiers().fFlags & Modifiers::kIn_Flag) && + var.modifiers().fLayout.fBuiltin == -1 && + var.type().typeKind() != Type::TypeKind::kTexture; +} + +// true if the var is part of the Uniforms struct +static bool is_uniforms(const Variable& var) { + SkASSERT(var.storage() == VariableStorage::kGlobal); + return var.modifiers().fFlags & Modifiers::kUniform_Flag && + var.type().typeKind() != Type::TypeKind::kSampler; +} + +// true if the var is part of the Threadgroups struct +static bool is_threadgroup(const Variable& var) { + SkASSERT(var.storage() == VariableStorage::kGlobal); + return var.modifiers().fFlags & Modifiers::kWorkgroup_Flag; +} + +// true if the var is part of the Globals struct +static bool is_in_globals(const Variable& var) { + SkASSERT(var.storage() == VariableStorage::kGlobal); + return !(var.modifiers().fFlags & Modifiers::kConst_Flag); +} + +void MetalCodeGenerator::writeVariableReference(const VariableReference& ref) { + // When assembling out-param helper functions, we copy variables into local clones with matching + // names. We never want to prepend "_in." or "_globals." when writing these variables since + // we're actually targeting the clones. + if (fIgnoreVariableReferenceModifiers) { + this->writeName(ref.variable()->mangledName()); + return; + } + + switch (ref.variable()->modifiers().fLayout.fBuiltin) { + case SK_FRAGCOLOR_BUILTIN: + this->write("_out.sk_FragColor"); + break; + case SK_FRAGCOORD_BUILTIN: + this->writeFragCoord(); + break; + case SK_VERTEXID_BUILTIN: + this->write("sk_VertexID"); + break; + case SK_INSTANCEID_BUILTIN: + this->write("sk_InstanceID"); + break; + case SK_CLOCKWISE_BUILTIN: + // We'd set the front facing winding in the MTLRenderCommandEncoder to be counter + // clockwise to match Skia convention. + if (!fRTFlipName.empty()) { + this->write("(" + fRTFlipName + ".y < 0 ? _frontFacing : !_frontFacing)"); + } else { + this->write("_frontFacing"); + } + break; + default: + const Variable& var = *ref.variable(); + if (var.storage() == Variable::Storage::kGlobal) { + if (is_input(var)) { + this->write("_in."); + } else if (is_output(var)) { + this->write("_out."); + } else if (is_uniforms(var)) { + this->write("_uniforms."); + } else if (is_threadgroup(var)) { + this->write("_threadgroups."); + } else if (is_in_globals(var)) { + this->write("_globals."); + } + } + this->writeName(var.mangledName()); + } +} + +void MetalCodeGenerator::writeIndexExpression(const IndexExpression& expr) { + // Metal does not seem to handle assignment into `vec.zyx[i]` properly--it compiles, but the + // results are wrong. We rewrite the expression as `vec[uint3(2,1,0)[i]]` instead. (Filed with + // Apple as FB12055941.) + if (expr.base()->is()) { + const Swizzle& swizzle = expr.base()->as(); + if (swizzle.components().size() > 1) { + this->writeExpression(*swizzle.base(), Precedence::kPostfix); + this->write("[uint" + std::to_string(swizzle.components().size()) + "("); + auto separator = SkSL::String::Separator(); + for (int8_t component : swizzle.components()) { + this->write(separator()); + this->write(std::to_string(component)); + } + this->write(")["); + this->writeExpression(*expr.index(), Precedence::kTopLevel); + this->write("]]"); + return; + } + } + + this->writeExpression(*expr.base(), Precedence::kPostfix); + this->write("["); + this->writeExpression(*expr.index(), Precedence::kTopLevel); + this->write("]"); +} + +void MetalCodeGenerator::writeFieldAccess(const FieldAccess& f) { + const Type::Field* field = &f.base()->type().fields()[f.fieldIndex()]; + if (FieldAccess::OwnerKind::kDefault == f.ownerKind()) { + this->writeExpression(*f.base(), Precedence::kPostfix); + this->write("."); + } + switch (field->fModifiers.fLayout.fBuiltin) { + case SK_POSITION_BUILTIN: + this->write("_out.sk_Position"); + break; + case SK_POINTSIZE_BUILTIN: + this->write("_out.sk_PointSize"); + break; + default: + if (FieldAccess::OwnerKind::kAnonymousInterfaceBlock == f.ownerKind()) { + this->write("_globals."); + this->write(fInterfaceBlockNameMap[fInterfaceBlockMap[field]]); + this->write("->"); + } + this->writeName(field->fName); + } +} + +void MetalCodeGenerator::writeSwizzle(const Swizzle& swizzle) { + this->writeExpression(*swizzle.base(), Precedence::kPostfix); + this->write("."); + for (int c : swizzle.components()) { + SkASSERT(c >= 0 && c <= 3); + this->write(&("x\0y\0z\0w\0"[c * 2])); + } +} + +void MetalCodeGenerator::writeMatrixTimesEqualHelper(const Type& left, const Type& right, + const Type& result) { + SkASSERT(left.isMatrix()); + SkASSERT(right.isMatrix()); + SkASSERT(result.isMatrix()); + + std::string key = "Matrix *= " + this->typeName(left) + ":" + this->typeName(right); + + if (!fHelpers.contains(key)) { + fHelpers.add(key); + fExtraFunctions.printf("thread %s& operator*=(thread %s& left, thread const %s& right) {\n" + " left = left * right;\n" + " return left;\n" + "}\n", + this->typeName(result).c_str(), this->typeName(left).c_str(), + this->typeName(right).c_str()); + } +} + +void MetalCodeGenerator::writeMatrixEqualityHelpers(const Type& left, const Type& right) { + SkASSERT(left.isMatrix()); + SkASSERT(right.isMatrix()); + SkASSERT(left.rows() == right.rows()); + SkASSERT(left.columns() == right.columns()); + + std::string key = "Matrix == " + this->typeName(left) + ":" + this->typeName(right); + + if (!fHelpers.contains(key)) { + fHelpers.add(key); + fExtraFunctionPrototypes.printf(R"( +thread bool operator==(const %s left, const %s right); +thread bool operator!=(const %s left, const %s right); +)", + this->typeName(left).c_str(), + this->typeName(right).c_str(), + this->typeName(left).c_str(), + this->typeName(right).c_str()); + + fExtraFunctions.printf( + "thread bool operator==(const %s left, const %s right) {\n" + " return ", + this->typeName(left).c_str(), this->typeName(right).c_str()); + + const char* separator = ""; + for (int index=0; indextypeName(left).c_str(), this->typeName(right).c_str()); + } +} + +void MetalCodeGenerator::writeMatrixDivisionHelpers(const Type& type) { + SkASSERT(type.isMatrix()); + + std::string key = "Matrix / " + this->typeName(type); + + if (!fHelpers.contains(key)) { + fHelpers.add(key); + std::string typeName = this->typeName(type); + + fExtraFunctions.printf( + "thread %s operator/(const %s left, const %s right) {\n" + " return %s(", + typeName.c_str(), typeName.c_str(), typeName.c_str(), typeName.c_str()); + + const char* separator = ""; + for (int index=0; indexwriteEqualityHelpers(type.componentType(), type.componentType()); + + std::string key = "ArrayEquality []"; + if (!fHelpers.contains(key)) { + fHelpers.add(key); + fExtraFunctionPrototypes.writeText(R"( +template +bool operator==(const array_ref left, const array_ref right); +template +bool operator!=(const array_ref left, const array_ref right); +)"); + fExtraFunctions.writeText(R"( +template +bool operator==(const array_ref left, const array_ref right) { + if (left.size() != right.size()) { + return false; + } + for (size_t index = 0; index < left.size(); ++index) { + if (!all(left[index] == right[index])) { + return false; + } + } + return true; +} + +template +bool operator!=(const array_ref left, const array_ref right) { + return !(left == right); +} +)"); + } +} + +void MetalCodeGenerator::writeStructEqualityHelpers(const Type& type) { + SkASSERT(type.isStruct()); + std::string key = "StructEquality " + this->typeName(type); + + if (!fHelpers.contains(key)) { + fHelpers.add(key); + // If one of the struct's fields needs a helper as well, we need to emit that one first. + for (const Type::Field& field : type.fields()) { + this->writeEqualityHelpers(*field.fType, *field.fType); + } + + // Write operator== and operator!= for this struct, since those are assumed to exist in SkSL + // and GLSL but do not exist by default in Metal. + fExtraFunctionPrototypes.printf(R"( +thread bool operator==(thread const %s& left, thread const %s& right); +thread bool operator!=(thread const %s& left, thread const %s& right); +)", + this->typeName(type).c_str(), + this->typeName(type).c_str(), + this->typeName(type).c_str(), + this->typeName(type).c_str()); + + fExtraFunctions.printf( + "thread bool operator==(thread const %s& left, thread const %s& right) {\n" + " return ", + this->typeName(type).c_str(), + this->typeName(type).c_str()); + + const char* separator = ""; + for (const Type::Field& field : type.fields()) { + if (field.fType->isArray()) { + fExtraFunctions.printf( + "%s(make_array_ref(left.%.*s) == make_array_ref(right.%.*s))", + separator, + (int)field.fName.size(), field.fName.data(), + (int)field.fName.size(), field.fName.data()); + } else { + fExtraFunctions.printf("%sall(left.%.*s == right.%.*s)", + separator, + (int)field.fName.size(), field.fName.data(), + (int)field.fName.size(), field.fName.data()); + } + separator = " &&\n "; + } + fExtraFunctions.printf( + ";\n" + "}\n" + "thread bool operator!=(thread const %s& left, thread const %s& right) {\n" + " return !(left == right);\n" + "}\n", + this->typeName(type).c_str(), + this->typeName(type).c_str()); + } +} + +void MetalCodeGenerator::writeEqualityHelpers(const Type& leftType, const Type& rightType) { + if (leftType.isArray() && rightType.isArray()) { + this->writeArrayEqualityHelpers(leftType); + return; + } + if (leftType.isStruct() && rightType.isStruct()) { + this->writeStructEqualityHelpers(leftType); + return; + } + if (leftType.isMatrix() && rightType.isMatrix()) { + this->writeMatrixEqualityHelpers(leftType, rightType); + return; + } +} + +void MetalCodeGenerator::writeNumberAsMatrix(const Expression& expr, const Type& matrixType) { + SkASSERT(expr.type().isNumber()); + SkASSERT(matrixType.isMatrix()); + + // Componentwise multiply the scalar against a matrix of the desired size which contains all 1s. + this->write("("); + this->writeType(matrixType); + this->write("("); + + const char* separator = ""; + for (int index = matrixType.slotCount(); index--;) { + this->write(separator); + this->write("1.0"); + separator = ", "; + } + + this->write(") * "); + this->writeExpression(expr, Precedence::kMultiplicative); + this->write(")"); +} + +void MetalCodeGenerator::writeBinaryExpressionElement(const Expression& expr, + Operator op, + const Expression& other, + Precedence precedence) { + bool needMatrixSplatOnScalar = other.type().isMatrix() && expr.type().isNumber() && + op.isValidForMatrixOrVector() && + op.removeAssignment().kind() != Operator::Kind::STAR; + if (needMatrixSplatOnScalar) { + this->writeNumberAsMatrix(expr, other.type()); + } else if (op.isEquality() && expr.type().isArray()) { + this->write("make_array_ref("); + this->writeExpression(expr, precedence); + this->write(")"); + } else { + this->writeExpression(expr, precedence); + } +} + +void MetalCodeGenerator::writeBinaryExpression(const BinaryExpression& b, + Precedence parentPrecedence) { + const Expression& left = *b.left(); + const Expression& right = *b.right(); + const Type& leftType = left.type(); + const Type& rightType = right.type(); + Operator op = b.getOperator(); + Precedence precedence = op.getBinaryPrecedence(); + bool needParens = precedence >= parentPrecedence; + switch (op.kind()) { + case Operator::Kind::EQEQ: + this->writeEqualityHelpers(leftType, rightType); + if (leftType.isVector()) { + this->write("all"); + needParens = true; + } + break; + case Operator::Kind::NEQ: + this->writeEqualityHelpers(leftType, rightType); + if (leftType.isVector()) { + this->write("any"); + needParens = true; + } + break; + default: + break; + } + if (leftType.isMatrix() && rightType.isMatrix() && op.kind() == Operator::Kind::STAREQ) { + this->writeMatrixTimesEqualHelper(leftType, rightType, b.type()); + } + if (op.removeAssignment().kind() == Operator::Kind::SLASH && + ((leftType.isMatrix() && rightType.isMatrix()) || + (leftType.isScalar() && rightType.isMatrix()) || + (leftType.isMatrix() && rightType.isScalar()))) { + this->writeMatrixDivisionHelpers(leftType.isMatrix() ? leftType : rightType); + } + + if (needParens) { + this->write("("); + } + + this->writeBinaryExpressionElement(left, op, right, precedence); + + if (op.kind() != Operator::Kind::EQ && op.isAssignment() && + left.kind() == Expression::Kind::kSwizzle && !Analysis::HasSideEffects(left)) { + // This doesn't compile in Metal: + // float4 x = float4(1); + // x.xy *= float2x2(...); + // with the error message "non-const reference cannot bind to vector element", + // but switching it to x.xy = x.xy * float2x2(...) fixes it. We perform this tranformation + // as long as the LHS has no side effects, and hope for the best otherwise. + this->write(" = "); + this->writeExpression(left, Precedence::kAssignment); + this->write(operator_name(op.removeAssignment())); + precedence = op.removeAssignment().getBinaryPrecedence(); + } else { + this->write(operator_name(op)); + } + + this->writeBinaryExpressionElement(right, op, left, precedence); + + if (needParens) { + this->write(")"); + } +} + +void MetalCodeGenerator::writeTernaryExpression(const TernaryExpression& t, + Precedence parentPrecedence) { + if (Precedence::kTernary >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*t.test(), Precedence::kTernary); + this->write(" ? "); + this->writeExpression(*t.ifTrue(), Precedence::kTernary); + this->write(" : "); + this->writeExpression(*t.ifFalse(), Precedence::kTernary); + if (Precedence::kTernary >= parentPrecedence) { + this->write(")"); + } +} + +void MetalCodeGenerator::writePrefixExpression(const PrefixExpression& p, + Precedence parentPrecedence) { + // According to the MSL specification, the arithmetic unary operators (+ and –) do not act + // upon matrix type operands. We treat the unary "+" as NOP for all operands. + const Operator op = p.getOperator(); + if (op.kind() == Operator::Kind::PLUS) { + return this->writeExpression(*p.operand(), Precedence::kPrefix); + } + + const bool matrixNegation = + op.kind() == Operator::Kind::MINUS && p.operand()->type().isMatrix(); + const bool needParens = Precedence::kPrefix >= parentPrecedence || matrixNegation; + + if (needParens) { + this->write("("); + } + + // Transform the unary "-" on a matrix type to a multiplication by -1. + if (matrixNegation) { + this->write("-1.0 * "); + } else { + this->write(p.getOperator().tightOperatorName()); + } + this->writeExpression(*p.operand(), Precedence::kPrefix); + + if (needParens) { + this->write(")"); + } +} + +void MetalCodeGenerator::writePostfixExpression(const PostfixExpression& p, + Precedence parentPrecedence) { + if (Precedence::kPostfix >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*p.operand(), Precedence::kPostfix); + this->write(p.getOperator().tightOperatorName()); + if (Precedence::kPostfix >= parentPrecedence) { + this->write(")"); + } +} + +void MetalCodeGenerator::writeLiteral(const Literal& l) { + const Type& type = l.type(); + if (type.isFloat()) { + this->write(l.description(OperatorPrecedence::kTopLevel)); + if (!l.type().highPrecision()) { + this->write("h"); + } + return; + } + if (type.isInteger()) { + if (type.matches(*fContext.fTypes.fUInt)) { + this->write(std::to_string(l.intValue() & 0xffffffff)); + this->write("u"); + } else if (type.matches(*fContext.fTypes.fUShort)) { + this->write(std::to_string(l.intValue() & 0xffff)); + this->write("u"); + } else { + this->write(std::to_string(l.intValue())); + } + return; + } + SkASSERT(type.isBoolean()); + this->write(l.description(OperatorPrecedence::kTopLevel)); +} + +void MetalCodeGenerator::writeFunctionRequirementArgs(const FunctionDeclaration& f, + const char*& separator) { + Requirements requirements = this->requirements(f); + if (requirements & kInputs_Requirement) { + this->write(separator); + this->write("_in"); + separator = ", "; + } + if (requirements & kOutputs_Requirement) { + this->write(separator); + this->write("_out"); + separator = ", "; + } + if (requirements & kUniforms_Requirement) { + this->write(separator); + this->write("_uniforms"); + separator = ", "; + } + if (requirements & kGlobals_Requirement) { + this->write(separator); + this->write("_globals"); + separator = ", "; + } + if (requirements & kFragCoord_Requirement) { + this->write(separator); + this->write("_fragCoord"); + separator = ", "; + } + if (requirements & kThreadgroups_Requirement) { + this->write(separator); + this->write("_threadgroups"); + separator = ", "; + } +} + +void MetalCodeGenerator::writeFunctionRequirementParams(const FunctionDeclaration& f, + const char*& separator) { + Requirements requirements = this->requirements(f); + if (requirements & kInputs_Requirement) { + this->write(separator); + this->write("Inputs _in"); + separator = ", "; + } + if (requirements & kOutputs_Requirement) { + this->write(separator); + this->write("thread Outputs& _out"); + separator = ", "; + } + if (requirements & kUniforms_Requirement) { + this->write(separator); + this->write("Uniforms _uniforms"); + separator = ", "; + } + if (requirements & kGlobals_Requirement) { + this->write(separator); + this->write("thread Globals& _globals"); + separator = ", "; + } + if (requirements & kFragCoord_Requirement) { + this->write(separator); + this->write("float4 _fragCoord"); + separator = ", "; + } + if (requirements & kThreadgroups_Requirement) { + this->write(separator); + this->write("threadgroup Threadgroups& _threadgroups"); + separator = ", "; + } +} + +int MetalCodeGenerator::getUniformBinding(const Modifiers& m) { + return (m.fLayout.fBinding >= 0) ? m.fLayout.fBinding + : fProgram.fConfig->fSettings.fDefaultUniformBinding; +} + +int MetalCodeGenerator::getUniformSet(const Modifiers& m) { + return (m.fLayout.fSet >= 0) ? m.fLayout.fSet + : fProgram.fConfig->fSettings.fDefaultUniformSet; +} + +bool MetalCodeGenerator::writeFunctionDeclaration(const FunctionDeclaration& f) { + fRTFlipName = fProgram.fInputs.fUseFlipRTUniform + ? "_globals._anonInterface0->" SKSL_RTFLIP_NAME + : ""; + const char* separator = ""; + if (f.isMain()) { + if (ProgramConfig::IsFragment(fProgram.fConfig->fKind)) { + this->write("fragment Outputs fragmentMain"); + } else if (ProgramConfig::IsVertex(fProgram.fConfig->fKind)) { + this->write("vertex Outputs vertexMain"); + } else if (ProgramConfig::IsCompute(fProgram.fConfig->fKind)) { + this->write("kernel void computeMain"); + } else { + fContext.fErrors->error(Position(), "unsupported kind of program"); + return false; + } + this->write("("); + if (!ProgramConfig::IsCompute(fProgram.fConfig->fKind)) { + this->write("Inputs _in [[stage_in]]"); + separator = ", "; + } + if (-1 != fUniformBuffer) { + this->write(separator); + this->write("constant Uniforms& _uniforms [[buffer(" + + std::to_string(fUniformBuffer) + ")]]"); + separator = ", "; + } + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + const GlobalVarDeclaration& decls = e->as(); + const VarDeclaration& decl = decls.varDeclaration(); + const Variable* var = decl.var(); + const SkSL::Type::TypeKind varKind = var->type().typeKind(); + + if (varKind == Type::TypeKind::kSampler || varKind == Type::TypeKind::kTexture) { + if (var->type().dimensions() != SpvDim2D) { + // Not yet implemented--Skia currently only uses 2D textures. + fContext.fErrors->error(decls.fPosition, "Unsupported texture dimensions"); + return false; + } + + int binding = getUniformBinding(var->modifiers()); + this->write(separator); + separator = ", "; + + if (varKind == Type::TypeKind::kSampler) { + this->writeType(var->type().textureType()); + this->write(" "); + this->writeName(var->mangledName()); + this->write(kTextureSuffix); + this->write(" [[texture("); + this->write(std::to_string(binding)); + this->write(")]], sampler "); + this->writeName(var->mangledName()); + this->write(kSamplerSuffix); + this->write(" [[sampler("); + this->write(std::to_string(binding)); + this->write(")]]"); + } else { + SkASSERT(varKind == Type::TypeKind::kTexture); + this->writeType(var->type()); + this->write(" "); + this->writeName(var->mangledName()); + this->write(" [[texture("); + this->write(std::to_string(binding)); + this->write(")]]"); + } + } else if (ProgramConfig::IsCompute(fProgram.fConfig->fKind)) { + std::string type, attr; + switch (var->modifiers().fLayout.fBuiltin) { + case SK_NUMWORKGROUPS_BUILTIN: + type = "uint3 "; + attr = " [[threadgroups_per_grid]]"; + break; + case SK_WORKGROUPID_BUILTIN: + type = "uint3 "; + attr = " [[threadgroup_position_in_grid]]"; + break; + case SK_LOCALINVOCATIONID_BUILTIN: + type = "uint3 "; + attr = " [[thread_position_in_threadgroup]]"; + break; + case SK_GLOBALINVOCATIONID_BUILTIN: + type = "uint3 "; + attr = " [[thread_position_in_grid]]"; + break; + case SK_LOCALINVOCATIONINDEX_BUILTIN: + type = "uint "; + attr = " [[thread_index_in_threadgroup]]"; + break; + default: + break; + } + if (!attr.empty()) { + this->write(separator); + this->write(type); + this->write(var->name()); + this->write(attr); + separator = ", "; + } + } + } else if (e->is()) { + const InterfaceBlock& intf = e->as(); + if (intf.typeName() == "sk_PerVertex") { + continue; + } + this->write(separator); + if (is_readonly(intf)) { + this->write("const "); + } + this->write(is_buffer(intf) ? "device " : "constant "); + this->writeType(intf.var()->type()); + this->write("& " ); + this->write(fInterfaceBlockNameMap[&intf]); + this->write(" [[buffer("); + this->write(std::to_string(this->getUniformBinding(intf.var()->modifiers()))); + this->write(")]]"); + separator = ", "; + } + } + if (ProgramConfig::IsFragment(fProgram.fConfig->fKind)) { + if (fProgram.fInputs.fUseFlipRTUniform && fInterfaceBlockNameMap.empty()) { + this->write(separator); + this->write("constant sksl_synthetic_uniforms& _anonInterface0 [[buffer(1)]]"); + fRTFlipName = "_anonInterface0." SKSL_RTFLIP_NAME; + separator = ", "; + } + this->write(separator); + this->write("bool _frontFacing [[front_facing]]"); + this->write(", float4 _fragCoord [[position]]"); + separator = ", "; + } else if (ProgramConfig::IsVertex(fProgram.fConfig->fKind)) { + this->write(separator); + this->write("uint sk_VertexID [[vertex_id]], uint sk_InstanceID [[instance_id]]"); + separator = ", "; + } + } else { + this->writeType(f.returnType()); + this->write(" "); + this->writeName(f.mangledName()); + this->write("("); + this->writeFunctionRequirementParams(f, separator); + } + for (const Variable* param : f.parameters()) { + if (f.isMain() && param->modifiers().fLayout.fBuiltin != -1) { + continue; + } + this->write(separator); + separator = ", "; + this->writeModifiers(param->modifiers()); + this->writeType(param->type()); + if (pass_by_reference(param->type(), param->modifiers())) { + this->write("&"); + } + this->write(" "); + this->writeName(param->mangledName()); + } + this->write(")"); + return true; +} + +void MetalCodeGenerator::writeFunctionPrototype(const FunctionPrototype& f) { + this->writeFunctionDeclaration(f.declaration()); + this->writeLine(";"); +} + +static bool is_block_ending_with_return(const Statement* stmt) { + // This function detects (potentially nested) blocks that end in a return statement. + if (!stmt->is()) { + return false; + } + const StatementArray& block = stmt->as().children(); + for (int index = block.size(); index--; ) { + stmt = block[index].get(); + if (stmt->is()) { + return true; + } + if (stmt->is()) { + return is_block_ending_with_return(stmt); + } + if (!stmt->is()) { + break; + } + } + return false; +} + +void MetalCodeGenerator::writeComputeMainInputs() { + // Compute shaders only have input variables (e.g. sk_GlobalInvocationID) and access program + // inputs/outputs via the Globals and Uniforms structs. We collect the allowed "in" parameters + // into an Input struct here, since the rest of the code expects the normal _in / _out pattern. + this->write("Inputs _in = { "); + const char* separator = ""; + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + const GlobalVarDeclaration& decls = e->as(); + const Variable* var = decls.varDeclaration().var(); + if (is_input(*var)) { + this->write(separator); + separator = ", "; + this->writeName(var->mangledName()); + } + } + } + this->writeLine(" };"); +} + +void MetalCodeGenerator::writeFunction(const FunctionDefinition& f) { + SkASSERT(!fProgram.fConfig->fSettings.fFragColorIsInOut); + + if (!this->writeFunctionDeclaration(f.declaration())) { + return; + } + + fCurrentFunction = &f.declaration(); + SkScopeExit clearCurrentFunction([&] { fCurrentFunction = nullptr; }); + + this->writeLine(" {"); + + if (f.declaration().isMain()) { + fIndentation++; + this->writeGlobalInit(); + if (ProgramConfig::IsCompute(fProgram.fConfig->fKind)) { + this->writeThreadgroupInit(); + this->writeComputeMainInputs(); + } + else { + this->writeLine("Outputs _out;"); + this->writeLine("(void)_out;"); + } + fIndentation--; + } + + fFunctionHeader.clear(); + StringStream buffer; + { + AutoOutputStream outputToBuffer(this, &buffer); + fIndentation++; + for (const std::unique_ptr& stmt : f.body()->as().children()) { + if (!stmt->isEmpty()) { + this->writeStatement(*stmt); + this->finishLine(); + } + } + if (f.declaration().isMain()) { + // If the main function doesn't end with a return, we need to synthesize one here. + if (!is_block_ending_with_return(f.body().get())) { + this->writeReturnStatementFromMain(); + this->finishLine(); + } + } + fIndentation--; + this->writeLine("}"); + } + this->write(fFunctionHeader); + this->write(buffer.str()); +} + +void MetalCodeGenerator::writeModifiers(const Modifiers& modifiers) { + if (ProgramConfig::IsCompute(fProgram.fConfig->fKind) && + (modifiers.fFlags & (Modifiers::kIn_Flag | Modifiers::kOut_Flag))) { + this->write("device "); + } else if (modifiers.fFlags & Modifiers::kOut_Flag) { + this->write("thread "); + } + if (modifiers.fFlags & Modifiers::kConst_Flag) { + this->write("const "); + } +} + +void MetalCodeGenerator::writeInterfaceBlock(const InterfaceBlock& intf) { + if (intf.typeName() == "sk_PerVertex") { + return; + } + const Type* structType = &intf.var()->type().componentType(); + this->writeModifiers(intf.var()->modifiers()); + this->write("struct "); + this->writeType(*structType); + this->writeLine(" {"); + fIndentation++; + this->writeFields(structType->fields(), structType->fPosition, &intf); + if (fProgram.fInputs.fUseFlipRTUniform) { + this->writeLine("float2 " SKSL_RTFLIP_NAME ";"); + } + fIndentation--; + this->write("}"); + if (intf.instanceName().size()) { + this->write(" "); + this->write(intf.instanceName()); + if (intf.arraySize() > 0) { + this->write("["); + this->write(std::to_string(intf.arraySize())); + this->write("]"); + } + fInterfaceBlockNameMap.set(&intf, intf.instanceName()); + } else { + fInterfaceBlockNameMap.set(&intf, *fProgram.fSymbols->takeOwnershipOfString( + "_anonInterface" + std::to_string(fAnonInterfaceCount++))); + } + this->writeLine(";"); +} + +void MetalCodeGenerator::writeFields(const std::vector& fields, Position parentPos, + const InterfaceBlock* parentIntf) { + MemoryLayout memoryLayout(MemoryLayout::Standard::kMetal); + int currentOffset = 0; + for (const Type::Field& field : fields) { + int fieldOffset = field.fModifiers.fLayout.fOffset; + const Type* fieldType = field.fType; + if (!memoryLayout.isSupported(*fieldType)) { + fContext.fErrors->error(parentPos, "type '" + std::string(fieldType->name()) + + "' is not permitted here"); + return; + } + if (fieldOffset != -1) { + if (currentOffset > fieldOffset) { + fContext.fErrors->error(field.fPosition, + "offset of field '" + std::string(field.fName) + + "' must be at least " + std::to_string(currentOffset)); + return; + } else if (currentOffset < fieldOffset) { + this->write("char pad"); + this->write(std::to_string(fPaddingCount++)); + this->write("["); + this->write(std::to_string(fieldOffset - currentOffset)); + this->writeLine("];"); + currentOffset = fieldOffset; + } + int alignment = memoryLayout.alignment(*fieldType); + if (fieldOffset % alignment) { + fContext.fErrors->error(field.fPosition, + "offset of field '" + std::string(field.fName) + + "' must be a multiple of " + std::to_string(alignment)); + return; + } + } + if (fieldType->isUnsizedArray()) { + // An unsized array always appears as the last member of a storage block. We declare + // it as a one-element array and allow dereferencing past the capacity. + // TODO(armansito): This is because C++ does not support flexible array members like C99 + // does. This generally works but it can lead to UB as compilers are free to insert + // padding past the first element of the array. An alternative approach is to declare + // the struct without the unsized array member and replace variable references with a + // buffer offset calculation based on sizeof(). + this->writeModifiers(field.fModifiers); + this->writeType(fieldType->componentType()); + this->write(" "); + this->writeName(field.fName); + this->write("[1]"); + } else { + size_t fieldSize = memoryLayout.size(*fieldType); + if (fieldSize > static_cast(std::numeric_limits::max() - currentOffset)) { + fContext.fErrors->error(parentPos, "field offset overflow"); + return; + } + currentOffset += fieldSize; + this->writeModifiers(field.fModifiers); + this->writeType(*fieldType); + this->write(" "); + this->writeName(field.fName); + } + this->writeLine(";"); + if (parentIntf) { + fInterfaceBlockMap.set(&field, parentIntf); + } + } +} + +void MetalCodeGenerator::writeVarInitializer(const Variable& var, const Expression& value) { + this->writeExpression(value, Precedence::kTopLevel); +} + +void MetalCodeGenerator::writeName(std::string_view name) { + if (fReservedWords.contains(name)) { + this->write("_"); // adding underscore before name to avoid conflict with reserved words + } + this->write(name); +} + +void MetalCodeGenerator::writeVarDeclaration(const VarDeclaration& varDecl) { + this->writeModifiers(varDecl.var()->modifiers()); + this->writeType(varDecl.var()->type()); + this->write(" "); + this->writeName(varDecl.var()->mangledName()); + if (varDecl.value()) { + this->write(" = "); + this->writeVarInitializer(*varDecl.var(), *varDecl.value()); + } + this->write(";"); +} + +void MetalCodeGenerator::writeStatement(const Statement& s) { + switch (s.kind()) { + case Statement::Kind::kBlock: + this->writeBlock(s.as()); + break; + case Statement::Kind::kExpression: + this->writeExpressionStatement(s.as()); + break; + case Statement::Kind::kReturn: + this->writeReturnStatement(s.as()); + break; + case Statement::Kind::kVarDeclaration: + this->writeVarDeclaration(s.as()); + break; + case Statement::Kind::kIf: + this->writeIfStatement(s.as()); + break; + case Statement::Kind::kFor: + this->writeForStatement(s.as()); + break; + case Statement::Kind::kDo: + this->writeDoStatement(s.as()); + break; + case Statement::Kind::kSwitch: + this->writeSwitchStatement(s.as()); + break; + case Statement::Kind::kBreak: + this->write("break;"); + break; + case Statement::Kind::kContinue: + this->write("continue;"); + break; + case Statement::Kind::kDiscard: + this->write("discard_fragment();"); + break; + case Statement::Kind::kNop: + this->write(";"); + break; + default: + SkDEBUGFAILF("unsupported statement: %s", s.description().c_str()); + break; + } +} + +void MetalCodeGenerator::writeBlock(const Block& b) { + // Write scope markers if this block is a scope, or if the block is empty (since we need to emit + // something here to make the code valid). + bool isScope = b.isScope() || b.isEmpty(); + if (isScope) { + this->writeLine("{"); + fIndentation++; + } + for (const std::unique_ptr& stmt : b.children()) { + if (!stmt->isEmpty()) { + this->writeStatement(*stmt); + this->finishLine(); + } + } + if (isScope) { + fIndentation--; + this->write("}"); + } +} + +void MetalCodeGenerator::writeIfStatement(const IfStatement& stmt) { + this->write("if ("); + this->writeExpression(*stmt.test(), Precedence::kTopLevel); + this->write(") "); + this->writeStatement(*stmt.ifTrue()); + if (stmt.ifFalse()) { + this->write(" else "); + this->writeStatement(*stmt.ifFalse()); + } +} + +void MetalCodeGenerator::writeForStatement(const ForStatement& f) { + // Emit loops of the form 'for(;test;)' as 'while(test)', which is probably how they started + if (!f.initializer() && f.test() && !f.next()) { + this->write("while ("); + this->writeExpression(*f.test(), Precedence::kTopLevel); + this->write(") "); + this->writeStatement(*f.statement()); + return; + } + + this->write("for ("); + if (f.initializer() && !f.initializer()->isEmpty()) { + this->writeStatement(*f.initializer()); + } else { + this->write("; "); + } + if (f.test()) { + this->writeExpression(*f.test(), Precedence::kTopLevel); + } + this->write("; "); + if (f.next()) { + this->writeExpression(*f.next(), Precedence::kTopLevel); + } + this->write(") "); + this->writeStatement(*f.statement()); +} + +void MetalCodeGenerator::writeDoStatement(const DoStatement& d) { + this->write("do "); + this->writeStatement(*d.statement()); + this->write(" while ("); + this->writeExpression(*d.test(), Precedence::kTopLevel); + this->write(");"); +} + +void MetalCodeGenerator::writeExpressionStatement(const ExpressionStatement& s) { + if (fProgram.fConfig->fSettings.fOptimize && !Analysis::HasSideEffects(*s.expression())) { + // Don't emit dead expressions. + return; + } + this->writeExpression(*s.expression(), Precedence::kTopLevel); + this->write(";"); +} + +void MetalCodeGenerator::writeSwitchStatement(const SwitchStatement& s) { + this->write("switch ("); + this->writeExpression(*s.value(), Precedence::kTopLevel); + this->writeLine(") {"); + fIndentation++; + for (const std::unique_ptr& stmt : s.cases()) { + const SwitchCase& c = stmt->as(); + if (c.isDefault()) { + this->writeLine("default:"); + } else { + this->write("case "); + this->write(std::to_string(c.value())); + this->writeLine(":"); + } + if (!c.statement()->isEmpty()) { + fIndentation++; + this->writeStatement(*c.statement()); + this->finishLine(); + fIndentation--; + } + } + fIndentation--; + this->write("}"); +} + +void MetalCodeGenerator::writeReturnStatementFromMain() { + // main functions in Metal return a magic _out parameter that doesn't exist in SkSL. + if (ProgramConfig::IsVertex(fProgram.fConfig->fKind) || + ProgramConfig::IsFragment(fProgram.fConfig->fKind)) { + this->write("return _out;"); + } else if (ProgramConfig::IsCompute(fProgram.fConfig->fKind)) { + this->write("return;"); + } else { + SkDEBUGFAIL("unsupported kind of program"); + } +} + +void MetalCodeGenerator::writeReturnStatement(const ReturnStatement& r) { + if (fCurrentFunction && fCurrentFunction->isMain()) { + if (r.expression()) { + if (r.expression()->type().matches(*fContext.fTypes.fHalf4)) { + this->write("_out.sk_FragColor = "); + this->writeExpression(*r.expression(), Precedence::kTopLevel); + this->writeLine(";"); + } else { + fContext.fErrors->error(r.fPosition, + "Metal does not support returning '" + + r.expression()->type().description() + "' from main()"); + } + } + this->writeReturnStatementFromMain(); + return; + } + + this->write("return"); + if (r.expression()) { + this->write(" "); + this->writeExpression(*r.expression(), Precedence::kTopLevel); + } + this->write(";"); +} + +void MetalCodeGenerator::writeHeader() { + this->write("#include \n"); + this->write("#include \n"); + this->write("using namespace metal;\n"); +} + +void MetalCodeGenerator::writeSampler2DPolyfill() { + class : public GlobalStructVisitor { + public: + void visitSampler(const Type&, std::string_view) override { + if (fWrotePolyfill) { + return; + } + fWrotePolyfill = true; + + std::string polyfill = SkSL::String::printf(R"( +struct sampler2D { + texture2d tex; + sampler smp; +}; +half4 sample(sampler2D i, float2 p, float b=%g) { return i.tex.sample(i.smp, p, bias(b)); } +half4 sample(sampler2D i, float3 p, float b=%g) { return i.tex.sample(i.smp, p.xy / p.z, bias(b)); } +half4 sampleLod(sampler2D i, float2 p, float lod) { return i.tex.sample(i.smp, p, level(lod)); } +half4 sampleLod(sampler2D i, float3 p, float lod) { + return i.tex.sample(i.smp, p.xy / p.z, level(lod)); +} +half4 sampleGrad(sampler2D i, float2 p, float2 dPdx, float2 dPdy) { + return i.tex.sample(i.smp, p, gradient2d(dPdx, dPdy)); +} + +)", + fTextureBias, + fTextureBias); + fCodeGen->write(polyfill.c_str()); + } + + MetalCodeGenerator* fCodeGen = nullptr; + float fTextureBias = 0.0f; + bool fWrotePolyfill = false; + } visitor; + + visitor.fCodeGen = this; + visitor.fTextureBias = fProgram.fConfig->fSettings.fSharpenTextures ? kSharpenTexturesBias + : 0.0f; + this->visitGlobalStruct(&visitor); +} + +void MetalCodeGenerator::writeUniformStruct() { + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + const GlobalVarDeclaration& decls = e->as(); + const Variable& var = *decls.varDeclaration().var(); + if (var.modifiers().fFlags & Modifiers::kUniform_Flag && + var.type().typeKind() != Type::TypeKind::kSampler && + var.type().typeKind() != Type::TypeKind::kTexture) { + int uniformSet = this->getUniformSet(var.modifiers()); + // Make sure that the program's uniform-set value is consistent throughout. + if (-1 == fUniformBuffer) { + this->write("struct Uniforms {\n"); + fUniformBuffer = uniformSet; + } else if (uniformSet != fUniformBuffer) { + fContext.fErrors->error(decls.fPosition, + "Metal backend requires all uniforms to have the same " + "'layout(set=...)'"); + } + this->write(" "); + this->writeType(var.type()); + this->write(" "); + this->writeName(var.mangledName()); + this->write(";\n"); + } + } + } + if (-1 != fUniformBuffer) { + this->write("};\n"); + } +} + +void MetalCodeGenerator::writeInputStruct() { + this->write("struct Inputs {\n"); + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + const GlobalVarDeclaration& decls = e->as(); + const Variable& var = *decls.varDeclaration().var(); + if (is_input(var)) { + this->write(" "); + if (ProgramConfig::IsCompute(fProgram.fConfig->fKind) && + needs_address_space(var.type(), var.modifiers())) { + // TODO: address space support + this->write("device "); + } + this->writeType(var.type()); + if (pass_by_reference(var.type(), var.modifiers())) { + this->write("&"); + } + this->write(" "); + this->writeName(var.mangledName()); + if (-1 != var.modifiers().fLayout.fLocation) { + if (ProgramConfig::IsVertex(fProgram.fConfig->fKind)) { + this->write(" [[attribute(" + + std::to_string(var.modifiers().fLayout.fLocation) + ")]]"); + } else if (ProgramConfig::IsFragment(fProgram.fConfig->fKind)) { + this->write(" [[user(locn" + + std::to_string(var.modifiers().fLayout.fLocation) + ")]]"); + } + } + this->write(";\n"); + } + } + } + this->write("};\n"); +} + +void MetalCodeGenerator::writeOutputStruct() { + this->write("struct Outputs {\n"); + if (ProgramConfig::IsVertex(fProgram.fConfig->fKind)) { + this->write(" float4 sk_Position [[position]];\n"); + } else if (ProgramConfig::IsFragment(fProgram.fConfig->fKind)) { + this->write(" half4 sk_FragColor [[color(0)]];\n"); + } + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + const GlobalVarDeclaration& decls = e->as(); + const Variable& var = *decls.varDeclaration().var(); + if (is_output(var)) { + this->write(" "); + if (ProgramConfig::IsCompute(fProgram.fConfig->fKind) && + needs_address_space(var.type(), var.modifiers())) { + // TODO: address space support + this->write("device "); + } + this->writeType(var.type()); + if (ProgramConfig::IsCompute(fProgram.fConfig->fKind) && + pass_by_reference(var.type(), var.modifiers())) { + this->write("&"); + } + this->write(" "); + this->writeName(var.mangledName()); + + int location = var.modifiers().fLayout.fLocation; + if (!ProgramConfig::IsCompute(fProgram.fConfig->fKind) && location < 0 && + var.type().typeKind() != Type::TypeKind::kTexture) { + fContext.fErrors->error(var.fPosition, + "Metal out variables must have 'layout(location=...)'"); + } else if (ProgramConfig::IsVertex(fProgram.fConfig->fKind)) { + this->write(" [[user(locn" + std::to_string(location) + ")]]"); + } else if (ProgramConfig::IsFragment(fProgram.fConfig->fKind)) { + this->write(" [[color(" + std::to_string(location) + ")"); + int colorIndex = var.modifiers().fLayout.fIndex; + if (colorIndex) { + this->write(", index(" + std::to_string(colorIndex) + ")"); + } + this->write("]]"); + } + this->write(";\n"); + } + } + } + if (ProgramConfig::IsVertex(fProgram.fConfig->fKind)) { + this->write(" float sk_PointSize [[point_size]];\n"); + } + this->write("};\n"); +} + +void MetalCodeGenerator::writeInterfaceBlocks() { + bool wroteInterfaceBlock = false; + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + this->writeInterfaceBlock(e->as()); + wroteInterfaceBlock = true; + } + } + if (!wroteInterfaceBlock && fProgram.fInputs.fUseFlipRTUniform) { + this->writeLine("struct sksl_synthetic_uniforms {"); + this->writeLine(" float2 " SKSL_RTFLIP_NAME ";"); + this->writeLine("};"); + } +} + +void MetalCodeGenerator::writeStructDefinitions() { + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + this->writeStructDefinition(e->as()); + } + } +} + +void MetalCodeGenerator::writeConstantVariables() { + class : public GlobalStructVisitor { + public: + void visitConstantVariable(const VarDeclaration& decl) override { + fCodeGen->write("constant "); + fCodeGen->writeVarDeclaration(decl); + fCodeGen->finishLine(); + } + + MetalCodeGenerator* fCodeGen = nullptr; + } visitor; + + visitor.fCodeGen = this; + this->visitGlobalStruct(&visitor); +} + +void MetalCodeGenerator::visitGlobalStruct(GlobalStructVisitor* visitor) { + for (const ProgramElement* element : fProgram.elements()) { + if (element->is()) { + const auto* ib = &element->as(); + if (ib->typeName() != "sk_PerVertex") { + visitor->visitInterfaceBlock(*ib, fInterfaceBlockNameMap[ib]); + } + continue; + } + if (!element->is()) { + continue; + } + const GlobalVarDeclaration& global = element->as(); + const VarDeclaration& decl = global.varDeclaration(); + const Variable& var = *decl.var(); + if (var.type().typeKind() == Type::TypeKind::kSampler) { + visitor->visitSampler(var.type(), var.mangledName()); + continue; + } + if (var.type().typeKind() == Type::TypeKind::kTexture) { + visitor->visitTexture(var.type(), var.modifiers(), var.mangledName()); + continue; + } + if (!(var.modifiers().fFlags & ~Modifiers::kConst_Flag) && + var.modifiers().fLayout.fBuiltin == -1) { + if (is_in_globals(var)) { + // Visit a regular global variable. + visitor->visitNonconstantVariable(var, decl.value().get()); + } else { + // Visit a constant-expression variable. + SkASSERT(var.modifiers().fFlags & Modifiers::kConst_Flag); + visitor->visitConstantVariable(decl); + } + } + } +} + +void MetalCodeGenerator::writeGlobalStruct() { + class : public GlobalStructVisitor { + public: + void visitInterfaceBlock(const InterfaceBlock& block, + std::string_view blockName) override { + this->addElement(); + fCodeGen->write(" "); + if (is_readonly(block)) { + fCodeGen->write("const "); + } + fCodeGen->write(is_buffer(block) ? "device " : "constant "); + fCodeGen->write(block.typeName()); + fCodeGen->write("* "); + fCodeGen->writeName(blockName); + fCodeGen->write(";\n"); + } + void visitTexture(const Type& type, const Modifiers& modifiers, + std::string_view name) override { + this->addElement(); + fCodeGen->write(" "); + fCodeGen->writeType(type); + fCodeGen->write(" "); + fCodeGen->writeName(name); + fCodeGen->write(";\n"); + } + void visitSampler(const Type&, std::string_view name) override { + this->addElement(); + fCodeGen->write(" sampler2D "); + fCodeGen->writeName(name); + fCodeGen->write(";\n"); + } + void visitConstantVariable(const VarDeclaration& decl) override { + // Constants aren't added to the global struct. + } + void visitNonconstantVariable(const Variable& var, const Expression* value) override { + this->addElement(); + fCodeGen->write(" "); + fCodeGen->writeModifiers(var.modifiers()); + fCodeGen->writeType(var.type()); + fCodeGen->write(" "); + fCodeGen->writeName(var.mangledName()); + fCodeGen->write(";\n"); + } + void addElement() { + if (fFirst) { + fCodeGen->write("struct Globals {\n"); + fFirst = false; + } + } + void finish() { + if (!fFirst) { + fCodeGen->writeLine("};"); + fFirst = true; + } + } + + MetalCodeGenerator* fCodeGen = nullptr; + bool fFirst = true; + } visitor; + + visitor.fCodeGen = this; + this->visitGlobalStruct(&visitor); + visitor.finish(); +} + +void MetalCodeGenerator::writeGlobalInit() { + class : public GlobalStructVisitor { + public: + void visitInterfaceBlock(const InterfaceBlock& blockType, + std::string_view blockName) override { + this->addElement(); + fCodeGen->write("&"); + fCodeGen->writeName(blockName); + } + void visitTexture(const Type&, const Modifiers& modifiers, std::string_view name) override { + this->addElement(); + fCodeGen->writeName(name); + } + void visitSampler(const Type&, std::string_view name) override { + this->addElement(); + fCodeGen->write("{"); + fCodeGen->writeName(name); + fCodeGen->write(kTextureSuffix); + fCodeGen->write(", "); + fCodeGen->writeName(name); + fCodeGen->write(kSamplerSuffix); + fCodeGen->write("}"); + } + void visitConstantVariable(const VarDeclaration& decl) override { + // Constant-expression variables aren't put in the global struct. + } + void visitNonconstantVariable(const Variable& var, const Expression* value) override { + this->addElement(); + if (value) { + fCodeGen->writeVarInitializer(var, *value); + } else { + fCodeGen->write("{}"); + } + } + void addElement() { + if (fFirst) { + fCodeGen->write("Globals _globals{"); + fFirst = false; + } else { + fCodeGen->write(", "); + } + } + void finish() { + if (!fFirst) { + fCodeGen->writeLine("};"); + fCodeGen->writeLine("(void)_globals;"); + } + } + MetalCodeGenerator* fCodeGen = nullptr; + bool fFirst = true; + } visitor; + + visitor.fCodeGen = this; + this->visitGlobalStruct(&visitor); + visitor.finish(); +} + +void MetalCodeGenerator::visitThreadgroupStruct(ThreadgroupStructVisitor* visitor) { + for (const ProgramElement* element : fProgram.elements()) { + if (!element->is()) { + continue; + } + const GlobalVarDeclaration& global = element->as(); + const VarDeclaration& decl = global.varDeclaration(); + const Variable& var = *decl.var(); + if (var.modifiers().fFlags & Modifiers::kWorkgroup_Flag) { + SkASSERT(!decl.value()); + SkASSERT(!(var.modifiers().fFlags & Modifiers::kConst_Flag)); + visitor->visitNonconstantVariable(var); + } + } +} + +void MetalCodeGenerator::writeThreadgroupStruct() { + class : public ThreadgroupStructVisitor { + public: + void visitNonconstantVariable(const Variable& var) override { + this->addElement(); + fCodeGen->write(" "); + fCodeGen->writeModifiers(var.modifiers()); + fCodeGen->writeType(var.type()); + fCodeGen->write(" "); + fCodeGen->writeName(var.mangledName()); + fCodeGen->write(";\n"); + } + void addElement() { + if (fFirst) { + fCodeGen->write("struct Threadgroups {\n"); + fFirst = false; + } + } + void finish() { + if (!fFirst) { + fCodeGen->writeLine("};"); + fFirst = true; + } + } + + MetalCodeGenerator* fCodeGen = nullptr; + bool fFirst = true; + } visitor; + + visitor.fCodeGen = this; + this->visitThreadgroupStruct(&visitor); + visitor.finish(); +} + +void MetalCodeGenerator::writeThreadgroupInit() { + class : public ThreadgroupStructVisitor { + public: + void visitNonconstantVariable(const Variable& var) override { + this->addElement(); + fCodeGen->write("{}"); + } + void addElement() { + if (fFirst) { + fCodeGen->write("threadgroup Threadgroups _threadgroups{"); + fFirst = false; + } else { + fCodeGen->write(", "); + } + } + void finish() { + if (!fFirst) { + fCodeGen->writeLine("};"); + fCodeGen->writeLine("(void)_threadgroups;"); + } + } + MetalCodeGenerator* fCodeGen = nullptr; + bool fFirst = true; + } visitor; + + visitor.fCodeGen = this; + this->visitThreadgroupStruct(&visitor); + visitor.finish(); +} + +void MetalCodeGenerator::writeProgramElement(const ProgramElement& e) { + switch (e.kind()) { + case ProgramElement::Kind::kExtension: + break; + case ProgramElement::Kind::kGlobalVar: + break; + case ProgramElement::Kind::kInterfaceBlock: + // handled in writeInterfaceBlocks, do nothing + break; + case ProgramElement::Kind::kStructDefinition: + // Handled in writeStructDefinitions. Do nothing. + break; + case ProgramElement::Kind::kFunction: + this->writeFunction(e.as()); + break; + case ProgramElement::Kind::kFunctionPrototype: + this->writeFunctionPrototype(e.as()); + break; + case ProgramElement::Kind::kModifiers: + this->writeModifiers(e.as().modifiers()); + this->writeLine(";"); + break; + default: + SkDEBUGFAILF("unsupported program element: %s\n", e.description().c_str()); + break; + } +} + +MetalCodeGenerator::Requirements MetalCodeGenerator::requirements(const Statement* s) { + class RequirementsVisitor : public ProgramVisitor { + public: + using ProgramVisitor::visitStatement; + + bool visitExpression(const Expression& e) override { + switch (e.kind()) { + case Expression::Kind::kFunctionCall: { + const FunctionCall& f = e.as(); + fRequirements |= fCodeGen->requirements(f.function()); + break; + } + case Expression::Kind::kFieldAccess: { + const FieldAccess& f = e.as(); + if (f.ownerKind() == FieldAccess::OwnerKind::kAnonymousInterfaceBlock) { + fRequirements |= kGlobals_Requirement; + return false; // don't recurse into the base variable + } + break; + } + case Expression::Kind::kVariableReference: { + const Variable& var = *e.as().variable(); + + if (var.modifiers().fLayout.fBuiltin == SK_FRAGCOORD_BUILTIN) { + fRequirements |= kGlobals_Requirement | kFragCoord_Requirement; + } else if (var.storage() == Variable::Storage::kGlobal) { + if (is_input(var)) { + fRequirements |= kInputs_Requirement; + } else if (is_output(var)) { + fRequirements |= kOutputs_Requirement; + } else if (is_uniforms(var)) { + fRequirements |= kUniforms_Requirement; + } else if (is_threadgroup(var)) { + fRequirements |= kThreadgroups_Requirement; + } else if (is_in_globals(var)) { + fRequirements |= kGlobals_Requirement; + } + } + break; + } + default: + break; + } + return INHERITED::visitExpression(e); + } + + MetalCodeGenerator* fCodeGen; + Requirements fRequirements = kNo_Requirements; + using INHERITED = ProgramVisitor; + }; + + RequirementsVisitor visitor; + if (s) { + visitor.fCodeGen = this; + visitor.visitStatement(*s); + } + return visitor.fRequirements; +} + +MetalCodeGenerator::Requirements MetalCodeGenerator::requirements(const FunctionDeclaration& f) { + Requirements* found = fRequirements.find(&f); + if (!found) { + fRequirements.set(&f, kNo_Requirements); + for (const ProgramElement* e : fProgram.elements()) { + if (e->is()) { + const FunctionDefinition& def = e->as(); + if (&def.declaration() == &f) { + Requirements reqs = this->requirements(def.body().get()); + fRequirements.set(&f, reqs); + return reqs; + } + } + } + // We never found a definition for this declared function, but it's legal to prototype a + // function without ever giving a definition, as long as you don't call it. + return kNo_Requirements; + } + return *found; +} + +bool MetalCodeGenerator::generateCode() { + StringStream header; + { + AutoOutputStream outputToHeader(this, &header, &fIndentation); + this->writeHeader(); + this->writeConstantVariables(); + this->writeSampler2DPolyfill(); + this->writeStructDefinitions(); + this->writeUniformStruct(); + this->writeInputStruct(); + if (!ProgramConfig::IsCompute(fProgram.fConfig->fKind)) { + this->writeOutputStruct(); + } + this->writeInterfaceBlocks(); + this->writeGlobalStruct(); + this->writeThreadgroupStruct(); + + // Emit prototypes for every built-in function; these aren't always added in perfect order. + for (const ProgramElement* e : fProgram.fSharedElements) { + if (e->is()) { + this->writeFunctionDeclaration(e->as().declaration()); + this->writeLine(";"); + } + } + } + StringStream body; + { + AutoOutputStream outputToBody(this, &body, &fIndentation); + + for (const ProgramElement* e : fProgram.elements()) { + this->writeProgramElement(*e); + } + } + write_stringstream(header, *fOut); + write_stringstream(fExtraFunctionPrototypes, *fOut); + write_stringstream(fExtraFunctions, *fOut); + write_stringstream(body, *fOut); + return fContext.fErrors->errorCount() == 0; +} + +} // namespace SkSL diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLMetalCodeGenerator.h b/gfx/skia/skia/src/sksl/codegen/SkSLMetalCodeGenerator.h new file mode 100644 index 0000000000..621b99edb4 --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLMetalCodeGenerator.h @@ -0,0 +1,330 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_METALCODEGENERATOR +#define SKSL_METALCODEGENERATOR + +#include "include/private/SkSLDefines.h" +#include "include/private/base/SkTArray.h" +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLStringStream.h" +#include "src/sksl/codegen/SkSLCodeGenerator.h" +#include "src/sksl/ir/SkSLType.h" + +#include +#include +#include +#include +#include + +namespace SkSL { + +class AnyConstructor; +class BinaryExpression; +class Block; +class ConstructorArrayCast; +class ConstructorCompound; +class ConstructorMatrixResize; +class Context; +class DoStatement; +class Expression; +class ExpressionStatement; +class Extension; +class FieldAccess; +class ForStatement; +class FunctionCall; +class FunctionDeclaration; +class FunctionDefinition; +class FunctionPrototype; +class IfStatement; +class IndexExpression; +class InterfaceBlock; +class Literal; +class Operator; +class OutputStream; +class Position; +class PostfixExpression; +class PrefixExpression; +class ProgramElement; +class ReturnStatement; +class Statement; +class StructDefinition; +class SwitchStatement; +class Swizzle; +class TernaryExpression; +class VarDeclaration; +class Variable; +class VariableReference; +enum class OperatorPrecedence : uint8_t; +enum IntrinsicKind : int8_t; +struct Layout; +struct Modifiers; +struct Program; + +/** + * Converts a Program into Metal code. + */ +class MetalCodeGenerator : public CodeGenerator { +public: + MetalCodeGenerator(const Context* context, const Program* program, OutputStream* out) + : INHERITED(context, program, out) + , fReservedWords({"atan2", "rsqrt", "rint", "dfdx", "dfdy", "vertex", "fragment"}) + , fLineEnding("\n") {} + + bool generateCode() override; + +protected: + using Precedence = OperatorPrecedence; + + typedef int Requirements; + inline static constexpr Requirements kNo_Requirements = 0; + inline static constexpr Requirements kInputs_Requirement = 1 << 0; + inline static constexpr Requirements kOutputs_Requirement = 1 << 1; + inline static constexpr Requirements kUniforms_Requirement = 1 << 2; + inline static constexpr Requirements kGlobals_Requirement = 1 << 3; + inline static constexpr Requirements kFragCoord_Requirement = 1 << 4; + inline static constexpr Requirements kThreadgroups_Requirement = 1 << 5; + + class GlobalStructVisitor; + void visitGlobalStruct(GlobalStructVisitor* visitor); + + class ThreadgroupStructVisitor; + void visitThreadgroupStruct(ThreadgroupStructVisitor* visitor); + + void write(std::string_view s); + + void writeLine(std::string_view s = std::string_view()); + + void finishLine(); + + void writeHeader(); + + void writeSampler2DPolyfill(); + + void writeUniformStruct(); + + void writeInputStruct(); + + void writeOutputStruct(); + + void writeInterfaceBlocks(); + + void writeStructDefinitions(); + + void writeConstantVariables(); + + void writeFields(const std::vector& fields, Position pos, + const InterfaceBlock* parentIntf = nullptr); + + int size(const Type* type, bool isPacked) const; + + int alignment(const Type* type, bool isPacked) const; + + void writeGlobalStruct(); + + void writeGlobalInit(); + + void writeThreadgroupStruct(); + + void writeThreadgroupInit(); + + void writePrecisionModifier(); + + std::string typeName(const Type& type); + + void writeStructDefinition(const StructDefinition& s); + + void writeType(const Type& type); + + void writeExtension(const Extension& ext); + + void writeInterfaceBlock(const InterfaceBlock& intf); + + void writeFunctionRequirementParams(const FunctionDeclaration& f, + const char*& separator); + + void writeFunctionRequirementArgs(const FunctionDeclaration& f, const char*& separator); + + bool writeFunctionDeclaration(const FunctionDeclaration& f); + + void writeFunction(const FunctionDefinition& f); + + void writeFunctionPrototype(const FunctionPrototype& f); + + void writeLayout(const Layout& layout); + + void writeModifiers(const Modifiers& modifiers); + + void writeVarInitializer(const Variable& var, const Expression& value); + + void writeName(std::string_view name); + + void writeVarDeclaration(const VarDeclaration& decl); + + void writeFragCoord(); + + void writeVariableReference(const VariableReference& ref); + + void writeExpression(const Expression& expr, Precedence parentPrecedence); + + void writeMinAbsHack(Expression& absExpr, Expression& otherExpr); + + std::string getOutParamHelper(const FunctionCall& c, + const ExpressionArray& arguments, + const SkTArray& outVars); + + std::string getInversePolyfill(const ExpressionArray& arguments); + + std::string getBitcastIntrinsic(const Type& outType); + + std::string getTempVariable(const Type& varType); + + void writeFunctionCall(const FunctionCall& c); + + bool matrixConstructHelperIsNeeded(const ConstructorCompound& c); + std::string getMatrixConstructHelper(const AnyConstructor& c); + void assembleMatrixFromMatrix(const Type& sourceMatrix, int rows, int columns); + void assembleMatrixFromExpressions(const AnyConstructor& ctor, int rows, int columns); + + void writeMatrixCompMult(); + + void writeOuterProduct(); + + void writeMatrixTimesEqualHelper(const Type& left, const Type& right, const Type& result); + + void writeMatrixDivisionHelpers(const Type& type); + + void writeMatrixEqualityHelpers(const Type& left, const Type& right); + + std::string getVectorFromMat2x2ConstructorHelper(const Type& matrixType); + + void writeArrayEqualityHelpers(const Type& type); + + void writeStructEqualityHelpers(const Type& type); + + void writeEqualityHelpers(const Type& leftType, const Type& rightType); + + void writeArgumentList(const ExpressionArray& arguments); + + void writeSimpleIntrinsic(const FunctionCall& c); + + bool writeIntrinsicCall(const FunctionCall& c, IntrinsicKind kind); + + void writeConstructorCompound(const ConstructorCompound& c, Precedence parentPrecedence); + + void writeConstructorCompoundVector(const ConstructorCompound& c, Precedence parentPrecedence); + + void writeConstructorCompoundMatrix(const ConstructorCompound& c, Precedence parentPrecedence); + + void writeConstructorMatrixResize(const ConstructorMatrixResize& c, + Precedence parentPrecedence); + + void writeAnyConstructor(const AnyConstructor& c, + const char* leftBracket, + const char* rightBracket, + Precedence parentPrecedence); + + void writeCastConstructor(const AnyConstructor& c, + const char* leftBracket, + const char* rightBracket, + Precedence parentPrecedence); + + void writeConstructorArrayCast(const ConstructorArrayCast& c, Precedence parentPrecedence); + + void writeFieldAccess(const FieldAccess& f); + + void writeSwizzle(const Swizzle& swizzle); + + // Splats a scalar expression across a matrix of arbitrary size. + void writeNumberAsMatrix(const Expression& expr, const Type& matrixType); + + void writeBinaryExpressionElement(const Expression& expr, + Operator op, + const Expression& other, + Precedence precedence); + + void writeBinaryExpression(const BinaryExpression& b, Precedence parentPrecedence); + + void writeTernaryExpression(const TernaryExpression& t, Precedence parentPrecedence); + + void writeIndexExpression(const IndexExpression& expr); + + void writePrefixExpression(const PrefixExpression& p, Precedence parentPrecedence); + + void writePostfixExpression(const PostfixExpression& p, Precedence parentPrecedence); + + void writeLiteral(const Literal& f); + + void writeStatement(const Statement& s); + + void writeStatements(const StatementArray& statements); + + void writeBlock(const Block& b); + + void writeIfStatement(const IfStatement& stmt); + + void writeForStatement(const ForStatement& f); + + void writeDoStatement(const DoStatement& d); + + void writeExpressionStatement(const ExpressionStatement& s); + + void writeSwitchStatement(const SwitchStatement& s); + + void writeReturnStatementFromMain(); + + void writeReturnStatement(const ReturnStatement& r); + + void writeProgramElement(const ProgramElement& e); + + Requirements requirements(const FunctionDeclaration& f); + + Requirements requirements(const Statement* s); + + // For compute shader main functions, writes and initializes the _in and _out structs (the + // instances, not the types themselves) + void writeComputeMainInputs(); + + int getUniformBinding(const Modifiers& m); + + int getUniformSet(const Modifiers& m); + + SkTHashSet fReservedWords; + SkTHashMap fInterfaceBlockMap; + SkTHashMap fInterfaceBlockNameMap; + int fAnonInterfaceCount = 0; + int fPaddingCount = 0; + const char* fLineEnding; + std::string fFunctionHeader; + StringStream fExtraFunctions; + StringStream fExtraFunctionPrototypes; + int fVarCount = 0; + int fIndentation = 0; + bool fAtLineStart = false; + // true if we have run into usages of dFdx / dFdy + bool fFoundDerivatives = false; + SkTHashMap fRequirements; + SkTHashSet fHelpers; + int fUniformBuffer = -1; + std::string fRTFlipName; + const FunctionDeclaration* fCurrentFunction = nullptr; + int fSwizzleHelperCount = 0; + bool fIgnoreVariableReferenceModifiers = false; + static constexpr char kTextureSuffix[] = "_Tex"; + static constexpr char kSamplerSuffix[] = "_Smplr"; + + // Workaround/polyfill flags + bool fWrittenInverse2 = false, fWrittenInverse3 = false, fWrittenInverse4 = false; + bool fWrittenMatrixCompMult = false; + bool fWrittenOuterProduct = false; + + using INHERITED = CodeGenerator; +}; + +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLPipelineStageCodeGenerator.cpp b/gfx/skia/skia/src/sksl/codegen/SkSLPipelineStageCodeGenerator.cpp new file mode 100644 index 0000000000..20466a922d --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLPipelineStageCodeGenerator.cpp @@ -0,0 +1,814 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "src/sksl/codegen/SkSLPipelineStageCodeGenerator.h" + +#if defined(SKSL_STANDALONE) || defined(SK_GANESH) || defined(SK_GRAPHITE) + +#include "include/core/SkSpan.h" +#include "include/core/SkTypes.h" +#include "include/private/SkSLDefines.h" +#include "include/private/SkSLIRNode.h" +#include "include/private/SkSLLayout.h" +#include "include/private/SkSLModifiers.h" +#include "include/private/SkSLProgramElement.h" +#include "include/private/SkSLProgramKind.h" +#include "include/private/SkSLStatement.h" +#include "include/private/SkSLString.h" +#include "include/private/base/SkTArray.h" +#include "include/sksl/SkSLOperator.h" +#include "src/core/SkTHash.h" +#include "src/sksl/SkSLBuiltinTypes.h" +#include "src/sksl/SkSLCompiler.h" +#include "src/sksl/SkSLIntrinsicList.h" +#include "src/sksl/SkSLProgramSettings.h" +#include "src/sksl/SkSLStringStream.h" +#include "src/sksl/ir/SkSLBinaryExpression.h" +#include "src/sksl/ir/SkSLBlock.h" +#include "src/sksl/ir/SkSLChildCall.h" +#include "src/sksl/ir/SkSLConstructor.h" +#include "src/sksl/ir/SkSLDoStatement.h" +#include "src/sksl/ir/SkSLExpression.h" +#include "src/sksl/ir/SkSLExpressionStatement.h" +#include "src/sksl/ir/SkSLFieldAccess.h" +#include "src/sksl/ir/SkSLForStatement.h" +#include "src/sksl/ir/SkSLFunctionCall.h" +#include "src/sksl/ir/SkSLFunctionDeclaration.h" +#include "src/sksl/ir/SkSLFunctionDefinition.h" +#include "src/sksl/ir/SkSLIfStatement.h" +#include "src/sksl/ir/SkSLIndexExpression.h" +#include "src/sksl/ir/SkSLPostfixExpression.h" +#include "src/sksl/ir/SkSLPrefixExpression.h" +#include "src/sksl/ir/SkSLProgram.h" +#include "src/sksl/ir/SkSLReturnStatement.h" +#include "src/sksl/ir/SkSLStructDefinition.h" +#include "src/sksl/ir/SkSLSwitchCase.h" +#include "src/sksl/ir/SkSLSwitchStatement.h" +#include "src/sksl/ir/SkSLSwizzle.h" +#include "src/sksl/ir/SkSLTernaryExpression.h" +#include "src/sksl/ir/SkSLType.h" +#include "src/sksl/ir/SkSLVarDeclarations.h" +#include "src/sksl/ir/SkSLVariable.h" +#include "src/sksl/ir/SkSLVariableReference.h" + +#include +#include +#include +#include + +namespace SkSL { +namespace PipelineStage { + +class PipelineStageCodeGenerator { +public: + PipelineStageCodeGenerator(const Program& program, + const char* sampleCoords, + const char* inputColor, + const char* destColor, + Callbacks* callbacks) + : fProgram(program) + , fSampleCoords(sampleCoords) + , fInputColor(inputColor) + , fDestColor(destColor) + , fCallbacks(callbacks) {} + + void generateCode(); + +private: + using Precedence = OperatorPrecedence; + + void write(std::string_view s); + void writeLine(std::string_view s = std::string_view()); + + std::string typeName(const Type& type); + void writeType(const Type& type); + + std::string functionName(const FunctionDeclaration& decl); + void writeFunction(const FunctionDefinition& f); + void writeFunctionDeclaration(const FunctionDeclaration& decl); + + std::string modifierString(const Modifiers& modifiers); + std::string functionDeclaration(const FunctionDeclaration& decl); + + // Handles arrays correctly, eg: `float x[2]` + std::string typedVariable(const Type& type, std::string_view name); + + void writeVarDeclaration(const VarDeclaration& var); + void writeGlobalVarDeclaration(const GlobalVarDeclaration& g); + void writeStructDefinition(const StructDefinition& s); + + void writeExpression(const Expression& expr, Precedence parentPrecedence); + void writeChildCall(const ChildCall& c); + void writeFunctionCall(const FunctionCall& c); + void writeAnyConstructor(const AnyConstructor& c, Precedence parentPrecedence); + void writeFieldAccess(const FieldAccess& f); + void writeSwizzle(const Swizzle& swizzle); + void writeBinaryExpression(const BinaryExpression& b, Precedence parentPrecedence); + void writeTernaryExpression(const TernaryExpression& t, Precedence parentPrecedence); + void writeIndexExpression(const IndexExpression& expr); + void writePrefixExpression(const PrefixExpression& p, Precedence parentPrecedence); + void writePostfixExpression(const PostfixExpression& p, Precedence parentPrecedence); + void writeVariableReference(const VariableReference& ref); + + void writeStatement(const Statement& s); + void writeBlock(const Block& b); + void writeIfStatement(const IfStatement& stmt); + void writeDoStatement(const DoStatement& d); + void writeForStatement(const ForStatement& f); + void writeReturnStatement(const ReturnStatement& r); + void writeSwitchStatement(const SwitchStatement& s); + + void writeProgramElementFirstPass(const ProgramElement& e); + void writeProgramElementSecondPass(const ProgramElement& e); + + struct AutoOutputBuffer { + AutoOutputBuffer(PipelineStageCodeGenerator* generator) : fGenerator(generator) { + fOldBuffer = fGenerator->fBuffer; + fGenerator->fBuffer = &fBuffer; + } + + ~AutoOutputBuffer() { + fGenerator->fBuffer = fOldBuffer; + } + + PipelineStageCodeGenerator* fGenerator; + StringStream* fOldBuffer; + StringStream fBuffer; + }; + + const Program& fProgram; + const char* fSampleCoords; + const char* fInputColor; + const char* fDestColor; + Callbacks* fCallbacks; + + SkTHashMap fVariableNames; + SkTHashMap fFunctionNames; + SkTHashMap fStructNames; + + StringStream* fBuffer = nullptr; + bool fCastReturnsToHalf = false; +}; + + +void PipelineStageCodeGenerator::write(std::string_view s) { + fBuffer->write(s.data(), s.length()); +} + +void PipelineStageCodeGenerator::writeLine(std::string_view s) { + fBuffer->write(s.data(), s.length()); + fBuffer->writeText("\n"); +} + +void PipelineStageCodeGenerator::writeChildCall(const ChildCall& c) { + const ExpressionArray& arguments = c.arguments(); + SkASSERT(arguments.size() >= 1); + int index = 0; + bool found = false; + for (const ProgramElement* p : fProgram.elements()) { + if (p->is()) { + const GlobalVarDeclaration& global = p->as(); + const VarDeclaration& decl = global.varDeclaration(); + if (decl.var() == &c.child()) { + found = true; + } else if (decl.var()->type().isEffectChild()) { + ++index; + } + } + if (found) { + break; + } + } + SkASSERT(found); + + // Shaders require a coordinate argument. Color filters require a color argument. + // Blenders require two color arguments. + std::string sampleOutput; + { + AutoOutputBuffer exprBuffer(this); + this->writeExpression(*arguments[0], Precedence::kSequence); + + switch (c.child().type().typeKind()) { + case Type::TypeKind::kShader: { + SkASSERT(arguments.size() == 1); + SkASSERT(arguments[0]->type().matches(*fProgram.fContext->fTypes.fFloat2)); + sampleOutput = fCallbacks->sampleShader(index, exprBuffer.fBuffer.str()); + break; + } + case Type::TypeKind::kColorFilter: { + SkASSERT(arguments.size() == 1); + SkASSERT(arguments[0]->type().matches(*fProgram.fContext->fTypes.fHalf4) || + arguments[0]->type().matches(*fProgram.fContext->fTypes.fFloat4)); + sampleOutput = fCallbacks->sampleColorFilter(index, exprBuffer.fBuffer.str()); + break; + } + case Type::TypeKind::kBlender: { + SkASSERT(arguments.size() == 2); + SkASSERT(arguments[0]->type().matches(*fProgram.fContext->fTypes.fHalf4) || + arguments[0]->type().matches(*fProgram.fContext->fTypes.fFloat4)); + SkASSERT(arguments[1]->type().matches(*fProgram.fContext->fTypes.fHalf4) || + arguments[1]->type().matches(*fProgram.fContext->fTypes.fFloat4)); + + AutoOutputBuffer exprBuffer2(this); + this->writeExpression(*arguments[1], Precedence::kSequence); + + sampleOutput = fCallbacks->sampleBlender(index, exprBuffer.fBuffer.str(), + exprBuffer2.fBuffer.str()); + break; + } + default: { + SkDEBUGFAILF("cannot sample from type '%s'", + c.child().type().description().c_str()); + } + } + } + this->write(sampleOutput); + return; +} + +void PipelineStageCodeGenerator::writeFunctionCall(const FunctionCall& c) { + const FunctionDeclaration& function = c.function(); + + if (function.intrinsicKind() == IntrinsicKind::k_toLinearSrgb_IntrinsicKind || + function.intrinsicKind() == IntrinsicKind::k_fromLinearSrgb_IntrinsicKind) { + SkASSERT(c.arguments().size() == 1); + std::string colorArg; + { + AutoOutputBuffer exprBuffer(this); + this->writeExpression(*c.arguments()[0], Precedence::kSequence); + colorArg = exprBuffer.fBuffer.str(); + } + + switch (function.intrinsicKind()) { + case IntrinsicKind::k_toLinearSrgb_IntrinsicKind: + this->write(fCallbacks->toLinearSrgb(std::move(colorArg))); + break; + case IntrinsicKind::k_fromLinearSrgb_IntrinsicKind: + this->write(fCallbacks->fromLinearSrgb(std::move(colorArg))); + break; + default: + SkUNREACHABLE; + } + + return; + } + + if (function.isBuiltin()) { + this->write(function.name()); + } else { + this->write(this->functionName(function)); + } + + this->write("("); + auto separator = SkSL::String::Separator(); + for (const auto& arg : c.arguments()) { + this->write(separator()); + this->writeExpression(*arg, Precedence::kSequence); + } + this->write(")"); +} + +void PipelineStageCodeGenerator::writeVariableReference(const VariableReference& ref) { + const Variable* var = ref.variable(); + const Modifiers& modifiers = var->modifiers(); + + if (modifiers.fLayout.fBuiltin == SK_MAIN_COORDS_BUILTIN) { + this->write(fSampleCoords); + return; + } else if (modifiers.fLayout.fBuiltin == SK_INPUT_COLOR_BUILTIN) { + this->write(fInputColor); + return; + } else if (modifiers.fLayout.fBuiltin == SK_DEST_COLOR_BUILTIN) { + this->write(fDestColor); + return; + } + + std::string* name = fVariableNames.find(var); + this->write(name ? *name : var->name()); +} + +void PipelineStageCodeGenerator::writeIfStatement(const IfStatement& stmt) { + this->write("if ("); + this->writeExpression(*stmt.test(), Precedence::kTopLevel); + this->write(") "); + this->writeStatement(*stmt.ifTrue()); + if (stmt.ifFalse()) { + this->write(" else "); + this->writeStatement(*stmt.ifFalse()); + } +} + +void PipelineStageCodeGenerator::writeReturnStatement(const ReturnStatement& r) { + this->write("return"); + if (r.expression()) { + this->write(" "); + if (fCastReturnsToHalf) { + this->write("half4("); + } + this->writeExpression(*r.expression(), Precedence::kTopLevel); + if (fCastReturnsToHalf) { + this->write(")"); + } + } + this->write(";"); +} + +void PipelineStageCodeGenerator::writeSwitchStatement(const SwitchStatement& s) { + this->write("switch ("); + this->writeExpression(*s.value(), Precedence::kTopLevel); + this->writeLine(") {"); + for (const std::unique_ptr& stmt : s.cases()) { + const SwitchCase& c = stmt->as(); + if (c.isDefault()) { + this->writeLine("default:"); + } else { + this->write("case "); + this->write(std::to_string(c.value())); + this->writeLine(":"); + } + if (!c.statement()->isEmpty()) { + this->writeStatement(*c.statement()); + this->writeLine(); + } + } + this->writeLine(); + this->write("}"); +} + +std::string PipelineStageCodeGenerator::functionName(const FunctionDeclaration& decl) { + if (decl.isMain()) { + return std::string(fCallbacks->getMainName()); + } + + std::string* name = fFunctionNames.find(&decl); + if (name) { + return *name; + } + + std::string mangledName = fCallbacks->getMangledName(std::string(decl.name()).c_str()); + fFunctionNames.set(&decl, mangledName); + return mangledName; +} + +void PipelineStageCodeGenerator::writeFunction(const FunctionDefinition& f) { + if (f.declaration().isBuiltin()) { + // Don't re-emit builtin functions. + return; + } + + AutoOutputBuffer body(this); + + // We allow public SkSL's main() to return half4 -or- float4 (ie vec4). When we emit + // our code in the processor, the surrounding code is going to expect half4, so we + // explicitly cast any returns (from main) to half4. This is only strictly necessary + // if the return type is float4 - injecting it unconditionally reduces the risk of an + // obscure bug. + const FunctionDeclaration& decl = f.declaration(); + if (decl.isMain() && + fProgram.fConfig->fKind != SkSL::ProgramKind::kMeshVertex && + fProgram.fConfig->fKind != SkSL::ProgramKind::kMeshFragment) { + fCastReturnsToHalf = true; + } + + for (const std::unique_ptr& stmt : f.body()->as().children()) { + this->writeStatement(*stmt); + this->writeLine(); + } + + if (decl.isMain()) { + fCastReturnsToHalf = false; + } + + fCallbacks->defineFunction(this->functionDeclaration(decl).c_str(), + body.fBuffer.str().c_str(), + decl.isMain()); +} + +std::string PipelineStageCodeGenerator::functionDeclaration(const FunctionDeclaration& decl) { + // This is similar to decl.description(), but substitutes a mangled name, and handles modifiers + // on the function (e.g. `inline`) and its parameters (e.g. `inout`). + std::string declString = + String::printf("%s%s%s %s(", + (decl.modifiers().fFlags & Modifiers::kInline_Flag) ? "inline " : "", + (decl.modifiers().fFlags & Modifiers::kNoInline_Flag) ? "noinline " : "", + this->typeName(decl.returnType()).c_str(), + this->functionName(decl).c_str()); + auto separator = SkSL::String::Separator(); + for (const Variable* p : decl.parameters()) { + declString.append(separator()); + declString.append(this->modifierString(p->modifiers())); + declString.append(this->typedVariable(p->type(), p->name()).c_str()); + } + + return declString + ")"; +} + +void PipelineStageCodeGenerator::writeFunctionDeclaration(const FunctionDeclaration& decl) { + if (!decl.isMain() && !decl.isBuiltin()) { + fCallbacks->declareFunction(this->functionDeclaration(decl).c_str()); + } +} + +void PipelineStageCodeGenerator::writeGlobalVarDeclaration(const GlobalVarDeclaration& g) { + const VarDeclaration& decl = g.varDeclaration(); + const Variable& var = *decl.var(); + + if (var.isBuiltin() || var.type().isOpaque()) { + // Don't re-declare these. (eg, sk_FragCoord, or fragmentProcessor children) + } else if (var.modifiers().fFlags & Modifiers::kUniform_Flag) { + std::string uniformName = fCallbacks->declareUniform(&decl); + fVariableNames.set(&var, std::move(uniformName)); + } else { + std::string mangledName = fCallbacks->getMangledName(std::string(var.name()).c_str()); + std::string declaration = this->modifierString(var.modifiers()) + + this->typedVariable(var.type(), + std::string_view(mangledName.c_str())); + if (decl.value()) { + AutoOutputBuffer outputToBuffer(this); + this->writeExpression(*decl.value(), Precedence::kTopLevel); + declaration += " = "; + declaration += outputToBuffer.fBuffer.str(); + } + declaration += ";\n"; + fCallbacks->declareGlobal(declaration.c_str()); + fVariableNames.set(&var, std::move(mangledName)); + } +} + +void PipelineStageCodeGenerator::writeStructDefinition(const StructDefinition& s) { + const Type& type = s.type(); + std::string mangledName = fCallbacks->getMangledName(type.displayName().c_str()); + std::string definition = "struct " + mangledName + " {\n"; + for (const auto& f : type.fields()) { + definition += this->typedVariable(*f.fType, f.fName) + ";\n"; + } + definition += "};\n"; + fStructNames.set(&type, std::move(mangledName)); + fCallbacks->defineStruct(definition.c_str()); +} + +void PipelineStageCodeGenerator::writeProgramElementFirstPass(const ProgramElement& e) { + switch (e.kind()) { + case ProgramElement::Kind::kGlobalVar: + this->writeGlobalVarDeclaration(e.as()); + break; + case ProgramElement::Kind::kFunction: + this->writeFunctionDeclaration(e.as().declaration()); + break; + case ProgramElement::Kind::kFunctionPrototype: + // Skip this; we're already emitting prototypes for every FunctionDefinition. + // (See case kFunction, directly above.) + break; + case ProgramElement::Kind::kStructDefinition: + this->writeStructDefinition(e.as()); + break; + + case ProgramElement::Kind::kExtension: + case ProgramElement::Kind::kInterfaceBlock: + case ProgramElement::Kind::kModifiers: + default: + SkDEBUGFAILF("unsupported program element %s\n", e.description().c_str()); + break; + } +} + +void PipelineStageCodeGenerator::writeProgramElementSecondPass(const ProgramElement& e) { + if (e.is()) { + this->writeFunction(e.as()); + } +} + +std::string PipelineStageCodeGenerator::typeName(const Type& raw) { + const Type& type = raw.resolve(); + if (type.isArray()) { + // This is necessary so that name mangling on arrays-of-structs works properly. + std::string arrayName = this->typeName(type.componentType()); + arrayName.push_back('['); + arrayName += std::to_string(type.columns()); + arrayName.push_back(']'); + return arrayName; + } + + std::string* name = fStructNames.find(&type); + return name ? *name : std::string(type.name()); +} + +void PipelineStageCodeGenerator::writeType(const Type& type) { + this->write(this->typeName(type)); +} + +void PipelineStageCodeGenerator::writeExpression(const Expression& expr, + Precedence parentPrecedence) { + switch (expr.kind()) { + case Expression::Kind::kBinary: + this->writeBinaryExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kLiteral: + this->write(expr.description()); + break; + case Expression::Kind::kChildCall: + this->writeChildCall(expr.as()); + break; + case Expression::Kind::kConstructorArray: + case Expression::Kind::kConstructorArrayCast: + case Expression::Kind::kConstructorCompound: + case Expression::Kind::kConstructorCompoundCast: + case Expression::Kind::kConstructorDiagonalMatrix: + case Expression::Kind::kConstructorMatrixResize: + case Expression::Kind::kConstructorScalarCast: + case Expression::Kind::kConstructorSplat: + case Expression::Kind::kConstructorStruct: + this->writeAnyConstructor(expr.asAnyConstructor(), parentPrecedence); + break; + case Expression::Kind::kFieldAccess: + this->writeFieldAccess(expr.as()); + break; + case Expression::Kind::kFunctionCall: + this->writeFunctionCall(expr.as()); + break; + case Expression::Kind::kPrefix: + this->writePrefixExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kPostfix: + this->writePostfixExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kSwizzle: + this->writeSwizzle(expr.as()); + break; + case Expression::Kind::kVariableReference: + this->writeVariableReference(expr.as()); + break; + case Expression::Kind::kTernary: + this->writeTernaryExpression(expr.as(), parentPrecedence); + break; + case Expression::Kind::kIndex: + this->writeIndexExpression(expr.as()); + break; + case Expression::Kind::kSetting: + default: + SkDEBUGFAILF("unsupported expression: %s", expr.description().c_str()); + break; + } +} + +void PipelineStageCodeGenerator::writeAnyConstructor(const AnyConstructor& c, + Precedence parentPrecedence) { + this->writeType(c.type()); + this->write("("); + auto separator = SkSL::String::Separator(); + for (const auto& arg : c.argumentSpan()) { + this->write(separator()); + this->writeExpression(*arg, Precedence::kSequence); + } + this->write(")"); +} + +void PipelineStageCodeGenerator::writeIndexExpression(const IndexExpression& expr) { + this->writeExpression(*expr.base(), Precedence::kPostfix); + this->write("["); + this->writeExpression(*expr.index(), Precedence::kTopLevel); + this->write("]"); +} + +void PipelineStageCodeGenerator::writeFieldAccess(const FieldAccess& f) { + if (f.ownerKind() == FieldAccess::OwnerKind::kDefault) { + this->writeExpression(*f.base(), Precedence::kPostfix); + this->write("."); + } + const Type& baseType = f.base()->type(); + this->write(baseType.fields()[f.fieldIndex()].fName); +} + +void PipelineStageCodeGenerator::writeSwizzle(const Swizzle& swizzle) { + this->writeExpression(*swizzle.base(), Precedence::kPostfix); + this->write("."); + for (int c : swizzle.components()) { + SkASSERT(c >= 0 && c <= 3); + this->write(&("x\0y\0z\0w\0"[c * 2])); + } +} + +void PipelineStageCodeGenerator::writeBinaryExpression(const BinaryExpression& b, + Precedence parentPrecedence) { + const Expression& left = *b.left(); + const Expression& right = *b.right(); + Operator op = b.getOperator(); + + Precedence precedence = op.getBinaryPrecedence(); + if (precedence >= parentPrecedence) { + this->write("("); + } + this->writeExpression(left, precedence); + this->write(op.operatorName()); + this->writeExpression(right, precedence); + if (precedence >= parentPrecedence) { + this->write(")"); + } +} + +void PipelineStageCodeGenerator::writeTernaryExpression(const TernaryExpression& t, + Precedence parentPrecedence) { + if (Precedence::kTernary >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*t.test(), Precedence::kTernary); + this->write(" ? "); + this->writeExpression(*t.ifTrue(), Precedence::kTernary); + this->write(" : "); + this->writeExpression(*t.ifFalse(), Precedence::kTernary); + if (Precedence::kTernary >= parentPrecedence) { + this->write(")"); + } +} + +void PipelineStageCodeGenerator::writePrefixExpression(const PrefixExpression& p, + Precedence parentPrecedence) { + if (Precedence::kPrefix >= parentPrecedence) { + this->write("("); + } + this->write(p.getOperator().tightOperatorName()); + this->writeExpression(*p.operand(), Precedence::kPrefix); + if (Precedence::kPrefix >= parentPrecedence) { + this->write(")"); + } +} + +void PipelineStageCodeGenerator::writePostfixExpression(const PostfixExpression& p, + Precedence parentPrecedence) { + if (Precedence::kPostfix >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*p.operand(), Precedence::kPostfix); + this->write(p.getOperator().tightOperatorName()); + if (Precedence::kPostfix >= parentPrecedence) { + this->write(")"); + } +} + +std::string PipelineStageCodeGenerator::modifierString(const Modifiers& modifiers) { + std::string result; + if (modifiers.fFlags & Modifiers::kConst_Flag) { + result.append("const "); + } + + if ((modifiers.fFlags & Modifiers::kIn_Flag) && (modifiers.fFlags & Modifiers::kOut_Flag)) { + result.append("inout "); + } else if (modifiers.fFlags & Modifiers::kIn_Flag) { + result.append("in "); + } else if (modifiers.fFlags & Modifiers::kOut_Flag) { + result.append("out "); + } + + return result; +} + +std::string PipelineStageCodeGenerator::typedVariable(const Type& type, std::string_view name) { + const Type& baseType = type.isArray() ? type.componentType() : type; + + std::string decl = this->typeName(baseType) + " " + std::string(name); + if (type.isArray()) { + decl += "[" + std::to_string(type.columns()) + "]"; + } + return decl; +} + +void PipelineStageCodeGenerator::writeVarDeclaration(const VarDeclaration& var) { + this->write(this->modifierString(var.var()->modifiers())); + this->write(this->typedVariable(var.var()->type(), var.var()->name())); + if (var.value()) { + this->write(" = "); + this->writeExpression(*var.value(), Precedence::kTopLevel); + } + this->write(";"); +} + +void PipelineStageCodeGenerator::writeStatement(const Statement& s) { + switch (s.kind()) { + case Statement::Kind::kBlock: + this->writeBlock(s.as()); + break; + case Statement::Kind::kBreak: + this->write("break;"); + break; + case Statement::Kind::kContinue: + this->write("continue;"); + break; + case Statement::Kind::kExpression: + this->writeExpression(*s.as().expression(), Precedence::kTopLevel); + this->write(";"); + break; + case Statement::Kind::kDo: + this->writeDoStatement(s.as()); + break; + case Statement::Kind::kFor: + this->writeForStatement(s.as()); + break; + case Statement::Kind::kIf: + this->writeIfStatement(s.as()); + break; + case Statement::Kind::kReturn: + this->writeReturnStatement(s.as()); + break; + case Statement::Kind::kSwitch: + this->writeSwitchStatement(s.as()); + break; + case Statement::Kind::kVarDeclaration: + this->writeVarDeclaration(s.as()); + break; + case Statement::Kind::kDiscard: + SkDEBUGFAIL("Unsupported control flow"); + break; + case Statement::Kind::kNop: + this->write(";"); + break; + default: + SkDEBUGFAILF("unsupported statement: %s", s.description().c_str()); + break; + } +} + +void PipelineStageCodeGenerator::writeBlock(const Block& b) { + // Write scope markers if this block is a scope, or if the block is empty (since we need to emit + // something here to make the code valid). + bool isScope = b.isScope() || b.isEmpty(); + if (isScope) { + this->writeLine("{"); + } + for (const std::unique_ptr& stmt : b.children()) { + if (!stmt->isEmpty()) { + this->writeStatement(*stmt); + this->writeLine(); + } + } + if (isScope) { + this->write("}"); + } +} + +void PipelineStageCodeGenerator::writeDoStatement(const DoStatement& d) { + this->write("do "); + this->writeStatement(*d.statement()); + this->write(" while ("); + this->writeExpression(*d.test(), Precedence::kTopLevel); + this->write(");"); + return; +} + +void PipelineStageCodeGenerator::writeForStatement(const ForStatement& f) { + // Emit loops of the form 'for(;test;)' as 'while(test)', which is probably how they started + if (!f.initializer() && f.test() && !f.next()) { + this->write("while ("); + this->writeExpression(*f.test(), Precedence::kTopLevel); + this->write(") "); + this->writeStatement(*f.statement()); + return; + } + + this->write("for ("); + if (f.initializer() && !f.initializer()->isEmpty()) { + this->writeStatement(*f.initializer()); + } else { + this->write("; "); + } + if (f.test()) { + this->writeExpression(*f.test(), Precedence::kTopLevel); + } + this->write("; "); + if (f.next()) { + this->writeExpression(*f.next(), Precedence::kTopLevel); + } + this->write(") "); + this->writeStatement(*f.statement()); +} + +void PipelineStageCodeGenerator::generateCode() { + // Write all the program elements except for functions; prototype all the functions. + for (const ProgramElement* e : fProgram.elements()) { + this->writeProgramElementFirstPass(*e); + } + + // We always place FunctionDefinition elements last, because the inliner likes to move function + // bodies around. After inlining, code can inadvertently move upwards, above ProgramElements + // that the code relies on. + for (const ProgramElement* e : fProgram.elements()) { + this->writeProgramElementSecondPass(*e); + } +} + +void ConvertProgram(const Program& program, + const char* sampleCoords, + const char* inputColor, + const char* destColor, + Callbacks* callbacks) { + PipelineStageCodeGenerator generator(program, sampleCoords, inputColor, destColor, callbacks); + generator.generateCode(); +} + +} // namespace PipelineStage +} // namespace SkSL + +#endif diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLPipelineStageCodeGenerator.h b/gfx/skia/skia/src/sksl/codegen/SkSLPipelineStageCodeGenerator.h new file mode 100644 index 0000000000..7efb0e187e --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLPipelineStageCodeGenerator.h @@ -0,0 +1,70 @@ +/* + * Copyright 2017 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_PIPELINESTAGECODEGENERATOR +#define SKSL_PIPELINESTAGECODEGENERATOR + +#include "include/core/SkTypes.h" + +#if defined(SKSL_STANDALONE) || defined(SK_GANESH) || defined(SK_GRAPHITE) + +#include + +namespace SkSL { + +struct Program; +class VarDeclaration; + +namespace PipelineStage { + class Callbacks { + public: + virtual ~Callbacks() = default; + + virtual std::string getMainName() { return "main"; } + virtual std::string getMangledName(const char* name) { return name; } + virtual void defineFunction(const char* declaration, const char* body, bool isMain) = 0; + virtual void declareFunction(const char* declaration) = 0; + virtual void defineStruct(const char* definition) = 0; + virtual void declareGlobal(const char* declaration) = 0; + + virtual std::string declareUniform(const VarDeclaration*) = 0; + virtual std::string sampleShader(int index, std::string coords) = 0; + virtual std::string sampleColorFilter(int index, std::string color) = 0; + virtual std::string sampleBlender(int index, std::string src, std::string dst) = 0; + + virtual std::string toLinearSrgb(std::string color) = 0; + virtual std::string fromLinearSrgb(std::string color) = 0; + }; + + /* + * Processes 'program' for use in a GrFragmentProcessor, or other context that wants SkSL-like + * code as input. To support fragment processor usage, there are callbacks that allow elements + * to be declared programmatically and to rename those elements (mangling to avoid collisions). + * + * - Any reference to the main coords builtin variable will be replaced with 'sampleCoords'. + * - Any reference to the input color builtin variable will be replaced with 'inputColor'. + * - Any reference to the dest color builtin variable will be replaced with 'destColor'. + * Dest-color is used in blend programs. + * - Each uniform variable declaration triggers a call to 'declareUniform', which should emit + * the declaration, and return the (possibly different) name to use for the variable. + * - Each function definition triggers a call to 'defineFunction', which should emit the + * definition, and return the (possibly different) name to use for calls to that function. + * - Each invocation of sample() triggers a call to 'sampleChild', which should return the full + * text of the call expression. + */ + void ConvertProgram(const Program& program, + const char* sampleCoords, + const char* inputColor, + const char* destColor, + Callbacks* callbacks); +} // namespace PipelineStage + +} // namespace SkSL + +#endif + +#endif diff --git a/gfx/skia/skia/src/sksl/codegen/SkSLRasterPipelineBuilder.cpp b/gfx/skia/skia/src/sksl/codegen/SkSLRasterPipelineBuilder.cpp new file mode 100644 index 0000000000..48d9f26d74 --- /dev/null +++ b/gfx/skia/skia/src/sksl/codegen/SkSLRasterPipelineBuilder.cpp @@ -0,0 +1,2861 @@ +/* + * Copyright 2022 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "include/core/SkStream.h" +#include "include/private/SkSLString.h" +#include "include/private/base/SkMalloc.h" +#include "include/private/base/SkTo.h" +#include "include/sksl/SkSLPosition.h" +#include "src/base/SkArenaAlloc.h" +#include "src/core/SkOpts.h" +#include "src/core/SkRasterPipelineOpContexts.h" +#include "src/core/SkRasterPipelineOpList.h" +#include "src/sksl/codegen/SkSLRasterPipelineBuilder.h" +#include "src/sksl/tracing/SkRPDebugTrace.h" +#include "src/sksl/tracing/SkSLDebugInfo.h" +#include "src/utils/SkBitSet.h" + +#if !defined(SKSL_STANDALONE) +#include "src/core/SkRasterPipeline.h" +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +namespace SkSL { +namespace RP { + +#define ALL_SINGLE_SLOT_UNARY_OP_CASES \ + BuilderOp::acos_float: \ + case BuilderOp::asin_float: \ + case BuilderOp::atan_float: \ + case BuilderOp::cos_float: \ + case BuilderOp::exp_float: \ + case BuilderOp::exp2_float: \ + case BuilderOp::log_float: \ + case BuilderOp::log2_float: \ + case BuilderOp::sin_float: \ + case BuilderOp::sqrt_float: \ + case BuilderOp::tan_float + +#define ALL_MULTI_SLOT_UNARY_OP_CASES \ + BuilderOp::abs_float: \ + case BuilderOp::abs_int: \ + case BuilderOp::bitwise_not_int: \ + case BuilderOp::cast_to_float_from_int: \ + case BuilderOp::cast_to_float_from_uint: \ + case BuilderOp::cast_to_int_from_float: \ + case BuilderOp::cast_to_uint_from_float: \ + case BuilderOp::ceil_float: \ + case BuilderOp::floor_float: \ + case BuilderOp::invsqrt_float + +#define ALL_N_WAY_BINARY_OP_CASES \ + BuilderOp::atan2_n_floats: \ + case BuilderOp::pow_n_floats + +#define ALL_MULTI_SLOT_BINARY_OP_CASES \ + BuilderOp::add_n_floats: \ + case BuilderOp::add_n_ints: \ + case BuilderOp::sub_n_floats: \ + case BuilderOp::sub_n_ints: \ + case BuilderOp::mul_n_floats: \ + case BuilderOp::mul_n_ints: \ + case BuilderOp::div_n_floats: \ + case BuilderOp::div_n_ints: \ + case BuilderOp::div_n_uints: \ + case BuilderOp::bitwise_and_n_ints: \ + case BuilderOp::bitwise_or_n_ints: \ + case BuilderOp::bitwise_xor_n_ints: \ + case BuilderOp::mod_n_floats: \ + case BuilderOp::min_n_floats: \ + case BuilderOp::min_n_ints: \ + case BuilderOp::min_n_uints: \ + case BuilderOp::max_n_floats: \ + case BuilderOp::max_n_ints: \ + case BuilderOp::max_n_uints: \ + case BuilderOp::cmple_n_floats: \ + case BuilderOp::cmple_n_ints: \ + case BuilderOp::cmple_n_uints: \ + case BuilderOp::cmplt_n_floats: \ + case BuilderOp::cmplt_n_ints: \ + case BuilderOp::cmplt_n_uints: \ + case BuilderOp::cmpeq_n_floats: \ + case BuilderOp::cmpeq_n_ints: \ + case BuilderOp::cmpne_n_floats: \ + case BuilderOp::cmpne_n_ints + +#define ALL_N_WAY_TERNARY_OP_CASES \ + BuilderOp::smoothstep_n_floats + +#define ALL_MULTI_SLOT_TERNARY_OP_CASES \ + BuilderOp::mix_n_floats: \ + case BuilderOp::mix_n_ints + +void Builder::unary_op(BuilderOp op, int32_t slots) { + switch (op) { + case ALL_SINGLE_SLOT_UNARY_OP_CASES: + case ALL_MULTI_SLOT_UNARY_OP_CASES: + fInstructions.push_back({op, {}, slots}); + break; + + default: + SkDEBUGFAIL("not a unary op"); + break; + } +} + +void Builder::binary_op(BuilderOp op, int32_t slots) { + switch (op) { + case ALL_N_WAY_BINARY_OP_CASES: + case ALL_MULTI_SLOT_BINARY_OP_CASES: + fInstructions.push_back({op, {}, slots}); + break; + + default: + SkDEBUGFAIL("not a binary op"); + break; + } +} + +void Builder::ternary_op(BuilderOp op, int32_t slots) { + switch (op) { + case ALL_N_WAY_TERNARY_OP_CASES: + case ALL_MULTI_SLOT_TERNARY_OP_CASES: + fInstructions.push_back({op, {}, slots}); + break; + + default: + SkDEBUGFAIL("not a ternary op"); + break; + } +} + +void Builder::dot_floats(int32_t slots) { + switch (slots) { + case 1: fInstructions.push_back({BuilderOp::mul_n_floats, {}, slots}); break; + case 2: fInstructions.push_back({BuilderOp::dot_2_floats, {}, slots}); break; + case 3: fInstructions.push_back({BuilderOp::dot_3_floats, {}, slots}); break; + case 4: fInstructions.push_back({BuilderOp::dot_4_floats, {}, slots}); break; + + default: + SkDEBUGFAIL("invalid number of slots"); + break; + } +} + +void Builder::refract_floats() { + fInstructions.push_back({BuilderOp::refract_4_floats, {}}); +} + +void Builder::inverse_matrix(int32_t n) { + switch (n) { + case 2: fInstructions.push_back({BuilderOp::inverse_mat2, {}, 4}); break; + case 3: fInstructions.push_back({BuilderOp::inverse_mat3, {}, 9}); break; + case 4: fInstructions.push_back({BuilderOp::inverse_mat4, {}, 16}); break; + default: SkUNREACHABLE; + } +} + +void Builder::discard_stack(int32_t count) { + // If we pushed something onto the stack and then immediately discarded part of it, we can + // shrink or eliminate the push. + while (count > 0 && !fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + switch (lastInstruction.fOp) { + case BuilderOp::discard_stack: + // Our last op was actually a separate discard_stack; combine the discards. + lastInstruction.fImmA += count; + return; + + case BuilderOp::push_zeros: + case BuilderOp::push_clone: + case BuilderOp::push_clone_from_stack: + case BuilderOp::push_clone_indirect_from_stack: + case BuilderOp::push_slots: + case BuilderOp::push_slots_indirect: + case BuilderOp::push_uniform: + case BuilderOp::push_uniform_indirect: + // Our last op was a multi-slot push; cancel out one discard and eliminate the op + // if its count reached zero. + --count; + --lastInstruction.fImmA; + if (lastInstruction.fImmA == 0) { + fInstructions.pop_back(); + } + continue; + + case BuilderOp::push_literal: + case BuilderOp::push_condition_mask: + case BuilderOp::push_loop_mask: + case BuilderOp::push_return_mask: + // Our last op was a single-slot push; cancel out one discard and eliminate the op. + --count; + fInstructions.pop_back(); + continue; + + default: + break; + } + + // This instruction wasn't a push. + break; + } + + if (count > 0) { + fInstructions.push_back({BuilderOp::discard_stack, {}, count}); + } +} + +void Builder::label(int labelID) { + SkASSERT(labelID >= 0 && labelID < fNumLabels); + + // If the previous instruction was a branch to this label, it's a no-op; jumping to the very + // next instruction is effectively meaningless. + while (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + switch (lastInstruction.fOp) { + case BuilderOp::jump: + case BuilderOp::branch_if_all_lanes_active: + case BuilderOp::branch_if_any_lanes_active: + case BuilderOp::branch_if_no_lanes_active: + case BuilderOp::branch_if_no_active_lanes_on_stack_top_equal: + if (lastInstruction.fImmA == labelID) { + fInstructions.pop_back(); + continue; + } + break; + + default: + break; + } + break; + } + fInstructions.push_back({BuilderOp::label, {}, labelID}); +} + +void Builder::jump(int labelID) { + SkASSERT(labelID >= 0 && labelID < fNumLabels); + if (!fInstructions.empty() && fInstructions.back().fOp == BuilderOp::jump) { + // The previous instruction was also `jump`, so this branch could never possibly occur. + return; + } + fInstructions.push_back({BuilderOp::jump, {}, labelID}); +} + +void Builder::branch_if_any_lanes_active(int labelID) { + if (!this->executionMaskWritesAreEnabled()) { + this->jump(labelID); + return; + } + + SkASSERT(labelID >= 0 && labelID < fNumLabels); + if (!fInstructions.empty() && + (fInstructions.back().fOp == BuilderOp::branch_if_any_lanes_active || + fInstructions.back().fOp == BuilderOp::jump)) { + // The previous instruction was `jump` or `branch_if_any_lanes_active`, so this branch + // could never possibly occur. + return; + } + fInstructions.push_back({BuilderOp::branch_if_any_lanes_active, {}, labelID}); +} + +void Builder::branch_if_all_lanes_active(int labelID) { + if (!this->executionMaskWritesAreEnabled()) { + this->jump(labelID); + return; + } + + SkASSERT(labelID >= 0 && labelID < fNumLabels); + if (!fInstructions.empty() && + (fInstructions.back().fOp == BuilderOp::branch_if_all_lanes_active || + fInstructions.back().fOp == BuilderOp::jump)) { + // The previous instruction was `jump` or `branch_if_all_lanes_active`, so this branch + // could never possibly occur. + return; + } + fInstructions.push_back({BuilderOp::branch_if_all_lanes_active, {}, labelID}); +} + +void Builder::branch_if_no_lanes_active(int labelID) { + if (!this->executionMaskWritesAreEnabled()) { + return; + } + + SkASSERT(labelID >= 0 && labelID < fNumLabels); + if (!fInstructions.empty() && + (fInstructions.back().fOp == BuilderOp::branch_if_no_lanes_active || + fInstructions.back().fOp == BuilderOp::jump)) { + // The previous instruction was `jump` or `branch_if_no_lanes_active`, so this branch + // could never possibly occur. + return; + } + fInstructions.push_back({BuilderOp::branch_if_no_lanes_active, {}, labelID}); +} + +void Builder::branch_if_no_active_lanes_on_stack_top_equal(int value, int labelID) { + SkASSERT(labelID >= 0 && labelID < fNumLabels); + if (!fInstructions.empty() && + (fInstructions.back().fOp == BuilderOp::jump || + (fInstructions.back().fOp == BuilderOp::branch_if_no_active_lanes_on_stack_top_equal && + fInstructions.back().fImmB == value))) { + // The previous instruction was `jump` or `branch_if_no_active_lanes_on_stack_top_equal` + // (checking against the same value), so this branch could never possibly occur. + return; + } + fInstructions.push_back({BuilderOp::branch_if_no_active_lanes_on_stack_top_equal, + {}, labelID, value}); +} + +void Builder::push_slots(SlotRange src) { + SkASSERT(src.count >= 0); + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + // If the previous instruction was pushing slots contiguous to this range, we can collapse + // the two pushes into one larger push. + if (lastInstruction.fOp == BuilderOp::push_slots && + lastInstruction.fSlotA + lastInstruction.fImmA == src.index) { + lastInstruction.fImmA += src.count; + return; + } + + // If the previous instruction was discarding an equal number of slots... + if (lastInstruction.fOp == BuilderOp::discard_stack && lastInstruction.fImmA == src.count) { + // ... and the instruction before that was copying from the stack to the same slots... + Instruction& prevInstruction = fInstructions.fromBack(1); + if ((prevInstruction.fOp == BuilderOp::copy_stack_to_slots || + prevInstruction.fOp == BuilderOp::copy_stack_to_slots_unmasked) && + prevInstruction.fSlotA == src.index && + prevInstruction.fImmA == src.count) { + // ... we are emitting `copy stack to X, discard stack, copy X to stack`. This is a + // common pattern when multiple operations in a row affect the same variable. We can + // eliminate the discard and just leave X on the stack. + fInstructions.pop_back(); + return; + } + } + } + + if (src.count > 0) { + fInstructions.push_back({BuilderOp::push_slots, {src.index}, src.count}); + } +} + +void Builder::push_slots_indirect(SlotRange fixedRange, int dynamicStackID, SlotRange limitRange) { + // SlotA: fixed-range start + // SlotB: limit-range end + // immA: number of slots + // immB: dynamic stack ID + fInstructions.push_back({BuilderOp::push_slots_indirect, + {fixedRange.index, limitRange.index + limitRange.count}, + fixedRange.count, + dynamicStackID}); +} + +void Builder::push_uniform(SlotRange src) { + SkASSERT(src.count >= 0); + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + // If the previous instruction was pushing uniforms contiguous to this range, we can + // collapse the two pushes into one larger push. + if (lastInstruction.fOp == BuilderOp::push_uniform && + lastInstruction.fSlotA + lastInstruction.fImmA == src.index) { + lastInstruction.fImmA += src.count; + return; + } + } + + if (src.count > 0) { + fInstructions.push_back({BuilderOp::push_uniform, {src.index}, src.count}); + } +} + +void Builder::push_uniform_indirect(SlotRange fixedRange, + int dynamicStackID, + SlotRange limitRange) { + // SlotA: fixed-range start + // SlotB: limit-range end + // immA: number of slots + // immB: dynamic stack ID + fInstructions.push_back({BuilderOp::push_uniform_indirect, + {fixedRange.index, limitRange.index + limitRange.count}, + fixedRange.count, + dynamicStackID}); +} + +void Builder::push_duplicates(int count) { + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + // If the previous op is pushing a zero, we can just push more of them. + if (lastInstruction.fOp == BuilderOp::push_zeros) { + lastInstruction.fImmA += count; + return; + } + } + SkASSERT(count >= 0); + if (count >= 3) { + // Use a swizzle to splat the input into a 4-slot value. + this->swizzle(/*consumedSlots=*/1, {0, 0, 0, 0}); + count -= 3; + } + for (; count >= 4; count -= 4) { + // Clone the splatted value four slots at a time. + this->push_clone(/*numSlots=*/4); + } + // Use a swizzle or clone to handle the trailing items. + switch (count) { + case 3: this->swizzle(/*consumedSlots=*/1, {0, 0, 0, 0}); break; + case 2: this->swizzle(/*consumedSlots=*/1, {0, 0, 0}); break; + case 1: this->push_clone(/*numSlots=*/1); break; + default: break; + } +} + +void Builder::push_clone_from_stack(SlotRange range, int otherStackID, int offsetFromStackTop) { + // immA: number of slots + // immB: other stack ID + // immC: offset from stack top + offsetFromStackTop -= range.index; + + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + // If the previous op is also pushing a clone... + if (lastInstruction.fOp == BuilderOp::push_clone_from_stack && + // ... from the same stack... + lastInstruction.fImmB == otherStackID && + // ... and this clone starts at the same place that the last clone ends... + lastInstruction.fImmC - lastInstruction.fImmA == offsetFromStackTop) { + // ... just extend the existing clone-op. + lastInstruction.fImmA += range.count; + return; + } + } + + fInstructions.push_back({BuilderOp::push_clone_from_stack, {}, + range.count, otherStackID, offsetFromStackTop}); +} + +void Builder::push_clone_indirect_from_stack(SlotRange fixedOffset, + int dynamicStackID, + int otherStackID, + int offsetFromStackTop) { + // immA: number of slots + // immB: other stack ID + // immC: offset from stack top + // immD: dynamic stack ID + offsetFromStackTop -= fixedOffset.index; + + fInstructions.push_back({BuilderOp::push_clone_indirect_from_stack, {}, + fixedOffset.count, otherStackID, offsetFromStackTop, dynamicStackID}); +} + +void Builder::pop_slots(SlotRange dst) { + if (!this->executionMaskWritesAreEnabled()) { + this->pop_slots_unmasked(dst); + return; + } + + this->copy_stack_to_slots(dst); + this->discard_stack(dst.count); +} + +void Builder::simplifyPopSlotsUnmasked(SlotRange* dst) { + if (!dst->count || fInstructions.empty()) { + // There's nothing left to simplify. + return; + } + + Instruction& lastInstruction = fInstructions.back(); + + // If the last instruction is pushing a constant, we can simplify it by copying the constant + // directly into the destination slot. + if (lastInstruction.fOp == BuilderOp::push_literal) { + // Remove the constant-push instruction. + int value = lastInstruction.fImmA; + fInstructions.pop_back(); + + // Consume one destination slot. + dst->count--; + Slot destinationSlot = dst->index + dst->count; + + // Continue simplifying if possible. + this->simplifyPopSlotsUnmasked(dst); + + // Write the constant directly to the destination slot. + this->copy_constant(destinationSlot, value); + return; + } + + // If the last instruction is pushing a zero, we can save a step by directly zeroing out + // the destination slot. + if (lastInstruction.fOp == BuilderOp::push_zeros) { + // Remove one zero-push. + lastInstruction.fImmA--; + if (lastInstruction.fImmA == 0) { + fInstructions.pop_back(); + } + + // Consume one destination slot. + dst->count--; + Slot destinationSlot = dst->index + dst->count; + + // Continue simplifying if possible. + this->simplifyPopSlotsUnmasked(dst); + + // Zero the destination slot directly. + this->zero_slots_unmasked({destinationSlot, 1}); + return; + } + + // If the last instruction is pushing a slot, we can just copy that slot. + if (lastInstruction.fOp == BuilderOp::push_slots) { + // Get the last slot. + Slot sourceSlot = lastInstruction.fSlotA + lastInstruction.fImmA - 1; + lastInstruction.fImmA--; + if (lastInstruction.fImmA == 0) { + fInstructions.pop_back(); + } + + // Consume one destination slot. + dst->count--; + Slot destinationSlot = dst->index + dst->count; + + // Try once more. + this->simplifyPopSlotsUnmasked(dst); + + // Copy the slot directly. + if (destinationSlot != sourceSlot) { + this->copy_slots_unmasked({destinationSlot, 1}, {sourceSlot, 1}); + } + return; + } +} + +void Builder::pop_slots_unmasked(SlotRange dst) { + SkASSERT(dst.count >= 0); + + // If we are popping immediately after a push, we can simplify the code by writing the pushed + // value directly to the destination range. + this->simplifyPopSlotsUnmasked(&dst); + + // Pop from the stack normally. + if (dst.count > 0) { + this->copy_stack_to_slots_unmasked(dst); + this->discard_stack(dst.count); + } +} + +void Builder::copy_stack_to_slots(SlotRange dst, int offsetFromStackTop) { + // If the execution mask is known to be all-true, then we can ignore the write mask. + if (!this->executionMaskWritesAreEnabled()) { + this->copy_stack_to_slots_unmasked(dst, offsetFromStackTop); + return; + } + + // If the last instruction copied the previous stack slots, just extend it. + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + // If the last op is copy-stack-to-slots... + if (lastInstruction.fOp == BuilderOp::copy_stack_to_slots && + // and this op's destination is immediately after the last copy-slots-op's destination + lastInstruction.fSlotA + lastInstruction.fImmA == dst.index && + // and this op's source is immediately after the last copy-slots-op's source + lastInstruction.fImmB - lastInstruction.fImmA == offsetFromStackTop) { + // then we can just extend the copy! + lastInstruction.fImmA += dst.count; + return; + } + } + + fInstructions.push_back({BuilderOp::copy_stack_to_slots, {dst.index}, + dst.count, offsetFromStackTop}); +} + +void Builder::copy_stack_to_slots_indirect(SlotRange fixedRange, + int dynamicStackID, + SlotRange limitRange) { + // SlotA: fixed-range start + // SlotB: limit-range end + // immA: number of slots + // immB: dynamic stack ID + fInstructions.push_back({BuilderOp::copy_stack_to_slots_indirect, + {fixedRange.index, limitRange.index + limitRange.count}, + fixedRange.count, + dynamicStackID}); +} + +static bool slot_ranges_overlap(SlotRange x, SlotRange y) { + return x.index < y.index + y.count && + y.index < x.index + x.count; +} + +void Builder::copy_slots_unmasked(SlotRange dst, SlotRange src) { + // If the last instruction copied adjacent slots, just extend it. + if (!fInstructions.empty()) { + Instruction& lastInstr = fInstructions.back(); + + // If the last op is copy-slots-unmasked... + if (lastInstr.fOp == BuilderOp::copy_slot_unmasked && + // and this op's destination is immediately after the last copy-slots-op's destination + lastInstr.fSlotA + lastInstr.fImmA == dst.index && + // and this op's source is immediately after the last copy-slots-op's source + lastInstr.fSlotB + lastInstr.fImmA == src.index && + // and the source/dest ranges will not overlap + !slot_ranges_overlap({lastInstr.fSlotB, lastInstr.fImmA + dst.count}, + {lastInstr.fSlotA, lastInstr.fImmA + dst.count})) { + // then we can just extend the copy! + lastInstr.fImmA += dst.count; + return; + } + } + + SkASSERT(dst.count == src.count); + fInstructions.push_back({BuilderOp::copy_slot_unmasked, {dst.index, src.index}, dst.count}); +} + +void Builder::copy_stack_to_slots_unmasked(SlotRange dst, int offsetFromStackTop) { + // If the last instruction copied the previous stack slots, just extend it. + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + // If the last op is copy-stack-to-slots-unmasked... + if (lastInstruction.fOp == BuilderOp::copy_stack_to_slots_unmasked && + // and this op's destination is immediately after the last copy-slots-op's destination + lastInstruction.fSlotA + lastInstruction.fImmA == dst.index && + // and this op's source is immediately after the last copy-slots-op's source + lastInstruction.fImmB - lastInstruction.fImmA == offsetFromStackTop) { + // then we can just extend the copy! + lastInstruction.fImmA += dst.count; + return; + } + } + + fInstructions.push_back({BuilderOp::copy_stack_to_slots_unmasked, {dst.index}, + dst.count, offsetFromStackTop}); +} + +void Builder::pop_return_mask() { + SkASSERT(this->executionMaskWritesAreEnabled()); + + // This instruction is going to overwrite the return mask. If the previous instruction was + // masking off the return mask, that's wasted work and it can be eliminated. + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + if (lastInstruction.fOp == BuilderOp::mask_off_return_mask) { + fInstructions.pop_back(); + } + } + + fInstructions.push_back({BuilderOp::pop_return_mask, {}}); +} + +void Builder::zero_slots_unmasked(SlotRange dst) { + if (!fInstructions.empty()) { + Instruction& lastInstruction = fInstructions.back(); + + if (lastInstruction.fOp == BuilderOp::zero_slot_unmasked) { + if (lastInstruction.fSlotA + lastInstruction.fImmA == dst.index) { + // The previous instruction was zeroing the range immediately before this range. + // Combine the ranges. + lastInstruction.fImmA += dst.count; + return; + } + } + + if (lastInstruction.fOp == BuilderOp::zero_slot_unmasked) { + if (lastInstruction.fSlotA == dst.index + dst.count) { + // The previous instruction was zeroing the range immediately after this range. + // Combine the ranges. + lastInstruction.fSlotA = dst.index; + lastInstruction.fImmA += dst.count; + return; + } + } + } + + fInstructions.push_back({BuilderOp::zero_slot_unmasked, {dst.index}, dst.count}); +} + +static int pack_nybbles(SkSpan components) { + // Pack up to 8 elements into nybbles, in reverse order. + int packed = 0; + for (auto iter = components.rbegin(); iter != components.rend(); ++iter) { + SkASSERT(*iter >= 0 && *iter <= 0xF); + packed <<= 4; + packed |= *iter; + } + return packed; +} + +static void unpack_nybbles_to_offsets(uint32_t components, SkSpan offsets) { + // Unpack component nybbles into byte-offsets pointing at stack slots. + for (size_t index = 0; index < offsets.size(); ++index) { + offsets[index] = (components & 0xF) * SkOpts::raster_pipeline_highp_stride * sizeof(float); + components >>= 4; + } +} + +static int max_packed_nybble(uint32_t components, size_t numComponents) { + int largest = 0; + for (size_t index = 0; index < numComponents; ++index) { + largest = std::max(largest, components & 0xF); + components >>= 4; + } + return largest; +} + +void Builder::swizzle_copy_stack_to_slots(SlotRange dst, + SkSpan components, + int offsetFromStackTop) { + // When the execution-mask writes-enabled flag is off, we could squeeze out a little bit of + // extra speed here by implementing and using an unmasked version of this op. + + // SlotA: fixed-range start + // immA: number of swizzle components + // immB: swizzle components + // immC: offset from stack top + fInstructions.push_back({BuilderOp::swizzle_copy_stack_to_slots, {dst.index}, + (int)components.size(), + pack_nybbles(components), + offsetFromStackTop}); +} + +void Builder::swizzle_copy_stack_to_slots_indirect(SlotRange fixedRange, + int dynamicStackID, + SlotRange limitRange, + SkSpan components, + int offsetFromStackTop) { + // When the execution-mask writes-enabled flag is off, we could squeeze out a little bit of + // extra speed here by implementing and using an unmasked version of this op. + + // SlotA: fixed-range start + // SlotB: limit-range end + // immA: number of swizzle components + // immB: swizzle components + // immC: offset from stack top + // immD: dynamic stack ID + fInstructions.push_back({BuilderOp::swizzle_copy_stack_to_slots_indirect, + {fixedRange.index, limitRange.index + limitRange.count}, + (int)components.size(), + pack_nybbles(components), + offsetFromStackTop, + dynamicStackID}); +} + +void Builder::swizzle(int consumedSlots, SkSpan components) { + // Consumes `consumedSlots` elements on the stack, then generates `elementSpan.size()` elements. + SkASSERT(consumedSlots >= 0); + + // We only allow up to 16 elements, and they can only reach 0-15 slots, due to nybble packing. + int numElements = components.size(); + SkASSERT(numElements <= 16); + SkASSERT(std::all_of(components.begin(), components.end(), [](int8_t e){ return e >= 0; })); + SkASSERT(std::all_of(components.begin(), components.end(), [](int8_t e){ return e <= 0xF; })); + + // Make a local copy of the element array. + int8_t elements[16] = {}; + std::copy(components.begin(), components.end(), std::begin(elements)); + + while (numElements > 0) { + // If the first element of the swizzle is zero... + if (elements[0] != 0) { + break; + } + // ...and zero isn't used elsewhere in the swizzle... + if (std::any_of(&elements[1], &elements[numElements], [](int8_t e) { return e == 0; })) { + break; + } + // We can omit the first slot from the swizzle entirely. + // Slide everything forward by one slot, and reduce the element index by one. + for (int index = 1; index < numElements; ++index) { + elements[index - 1] = elements[index] - 1; + } + elements[numElements - 1] = 0; + --consumedSlots; + --numElements; + } + + // A completely empty swizzle is a no-op. + if (numElements == 0) { + this->discard_stack(consumedSlots); + return; + } + + if (consumedSlots <= 4 && numElements <= 4) { + // We can fit everything into a little swizzle. + int op = (int)BuilderOp::swizzle_1 + numElements - 1; + fInstructions.push_back({(BuilderOp)op, {}, consumedSlots, + pack_nybbles(SkSpan(elements, numElements))}); + return; + } + + // This is a big swizzle. We use the `shuffle` op to handle these. + // Slot usage is packed into immA. The top 16 bits of immA count the consumed slots; the bottom + // 16 bits count the generated slots. + int slotUsage = consumedSlots << 16; + slotUsage |= numElements; + + // Pack immB and immC with the shuffle list in packed-nybble form. + fInstructions.push_back({BuilderOp::shuffle, {}, slotUsage, + pack_nybbles(SkSpan(&elements[0], 8)), + pack_nybbles(SkSpan(&elements[8], 8))}); +} + +void Builder::transpose(int columns, int rows) { + // Transposes a matrix of size CxR on the stack (into a matrix of size RxC). + int8_t elements[16] = {}; + size_t index = 0; + for (int r = 0; r < rows; ++r) { + for (int c = 0; c < columns; ++c) { + elements[index++] = (c * rows) + r; + } + } + this->swizzle(/*consumedSlots=*/columns * rows, SkSpan(elements, index)); +} + +void Builder::diagonal_matrix(int columns, int rows) { + // Generates a CxR diagonal matrix from the top two scalars on the stack. + int8_t elements[16] = {}; + size_t index = 0; + for (int c = 0; c < columns; ++c) { + for (int r = 0; r < rows; ++r) { + elements[index++] = (c == r) ? 1 : 0; + } + } + this->swizzle(/*consumedSlots=*/2, SkSpan(elements, index)); +} + +void Builder::matrix_resize(int origColumns, int origRows, int newColumns, int newRows) { + // Resizes a CxR matrix at the top of the stack to C'xR'. + int8_t elements[16] = {}; + size_t index = 0; + + size_t consumedSlots = origColumns * origRows; + size_t zeroOffset = 0, oneOffset = 0; + + for (int c = 0; c < newColumns; ++c) { + for (int r = 0; r < newRows; ++r) { + if (c < origColumns && r < origRows) { + // Push an element from the original matrix. + elements[index++] = (c * origRows) + r; + } else { + // This element is outside the original matrix; push 1 or 0. + if (c == r) { + // We need to synthesize a literal 1. + if (oneOffset == 0) { + this->push_literal_f(1.0f); + oneOffset = consumedSlots++; + } + elements[index++] = oneOffset; + } else { + // We need to synthesize a literal 0. + if (zeroOffset == 0) { + this->push_zeros(1); + zeroOffset = consumedSlots++; + } + elements[index++] = zeroOffset; + } + } + } + } + this->swizzle(consumedSlots, SkSpan(elements, index)); +} + +std::unique_ptr Builder::finish(int numValueSlots, + int numUniformSlots, + SkRPDebugTrace* debugTrace) { + // Verify that calls to enableExecutionMaskWrites and disableExecutionMaskWrites are balanced. + SkASSERT(fExecutionMaskWritesEnabled == 0); + + return std::make_unique(std::move(fInstructions), numValueSlots, numUniformSlots, + fNumLabels, debugTrace); +} + +void Program::optimize() { + // TODO(johnstiles): perform any last-minute cleanup of the instruction stream here +} + +static int stack_usage(const Instruction& inst) { + switch (inst.fOp) { + case BuilderOp::push_literal: + case BuilderOp::push_condition_mask: + case BuilderOp::push_loop_mask: + case BuilderOp::push_return_mask: + return 1; + + case BuilderOp::push_src_rgba: + case BuilderOp::push_dst_rgba: + return 4; + + case BuilderOp::push_slots: + case BuilderOp::push_slots_indirect: + case BuilderOp::push_uniform: + case BuilderOp::push_uniform_indirect: + case BuilderOp::push_zeros: + case BuilderOp::push_clone: + case BuilderOp::push_clone_from_stack: + case BuilderOp::push_clone_indirect_from_stack: + return inst.fImmA; + + case BuilderOp::pop_condition_mask: + case BuilderOp::pop_loop_mask: + case BuilderOp::pop_and_reenable_loop_mask: + case BuilderOp::pop_return_mask: + return -1; + + case BuilderOp::pop_src_rg: + return -2; + + case BuilderOp::pop_src_rgba: + case BuilderOp::pop_dst_rgba: + return -4; + + case ALL_N_WAY_BINARY_OP_CASES: + case ALL_MULTI_SLOT_BINARY_OP_CASES: + case BuilderOp::discard_stack: + case BuilderOp::select: + return -inst.fImmA; + + case ALL_N_WAY_TERNARY_OP_CASES: + case ALL_MULTI_SLOT_TERNARY_OP_CASES: + return 2 * -inst.fImmA; + + case BuilderOp::swizzle_1: + return 1 - inst.fImmA; // consumes immA slots and emits a scalar + case BuilderOp::swizzle_2: + return 2 - inst.fImmA; // consumes immA slots and emits a 2-slot vector + case BuilderOp::swizzle_3: + return 3 - inst.fImmA; // consumes immA slots and emits a 3-slot vector + case BuilderOp::swizzle_4: + return 4 - inst.fImmA; // consumes immA slots and emits a 4-slot vector + + case BuilderOp::dot_2_floats: + return -3; // consumes two 2-slot vectors and emits one scalar + case BuilderOp::dot_3_floats: + return -5; // consumes two 3-slot vectors and emits one scalar + case BuilderOp::dot_4_floats: + return -7; // consumes two 4-slot vectors and emits one scalar + + case BuilderOp::refract_4_floats: + return -5; // consumes nine slots (N + I + eta) and emits a 4-slot vector (R) + + case BuilderOp::shuffle: { + int consumed = inst.fImmA >> 16; + int generated = inst.fImmA & 0xFFFF; + return generated - consumed; + } + case ALL_SINGLE_SLOT_UNARY_OP_CASES: + case ALL_MULTI_SLOT_UNARY_OP_CASES: + default: + return 0; + } +} + +Program::StackDepthMap Program::tempStackMaxDepths() const { + StackDepthMap largest; + StackDepthMap current; + + int curIdx = 0; + for (const Instruction& inst : fInstructions) { + if (inst.fOp == BuilderOp::set_current_stack) { + curIdx = inst.fImmA; + } + current[curIdx] += stack_usage(inst); + largest[curIdx] = std::max(current[curIdx], largest[curIdx]); + SkASSERTF(current[curIdx] >= 0, "unbalanced temp stack push/pop on stack %d", curIdx); + } + + for (const auto& [stackIdx, depth] : current) { + (void)stackIdx; + SkASSERTF(depth == 0, "unbalanced temp stack push/pop"); + } + + return largest; +} + +Program::Program(SkTArray instrs, + int numValueSlots, + int numUniformSlots, + int numLabels, + SkRPDebugTrace* debugTrace) + : fInstructions(std::move(instrs)) + , fNumValueSlots(numValueSlots) + , fNumUniformSlots(numUniformSlots) + , fNumLabels(numLabels) + , fDebugTrace(debugTrace) { + this->optimize(); + + fTempStackMaxDepths = this->tempStackMaxDepths(); + + fNumTempStackSlots = 0; + for (const auto& [stackIdx, depth] : fTempStackMaxDepths) { + (void)stackIdx; + fNumTempStackSlots += depth; + } +} + +void Program::appendCopy(SkTArray* pipeline, + SkArenaAlloc* alloc, + ProgramOp baseStage, + float* dst, int dstStride, + const float* src, int srcStride, + int numSlots) const { + SkASSERT(numSlots >= 0); + while (numSlots > 4) { + this->appendCopy(pipeline, alloc, baseStage, dst, dstStride, src, srcStride,/*numSlots=*/4); + dst += 4 * dstStride; + src += 4 * srcStride; + numSlots -= 4; + } + + if (numSlots > 0) { + SkASSERT(numSlots <= 4); + auto stage = (ProgramOp)((int)baseStage + numSlots - 1); + auto* ctx = alloc->make(); + ctx->dst = dst; + ctx->src = src; + pipeline->push_back({stage, ctx}); + } +} + +void Program::appendCopySlotsUnmasked(SkTArray* pipeline, + SkArenaAlloc* alloc, + float* dst, + const float* src, + int numSlots) const { + this->appendCopy(pipeline, alloc, + ProgramOp::copy_slot_unmasked, + dst, /*dstStride=*/SkOpts::raster_pipeline_highp_stride, + src, /*srcStride=*/SkOpts::raster_pipeline_highp_stride, + numSlots); +} + +void Program::appendCopySlotsMasked(SkTArray* pipeline, + SkArenaAlloc* alloc, + float* dst, + const float* src, + int numSlots) const { + this->appendCopy(pipeline, alloc, + ProgramOp::copy_slot_masked, + dst, /*dstStride=*/SkOpts::raster_pipeline_highp_stride, + src, /*srcStride=*/SkOpts::raster_pipeline_highp_stride, + numSlots); +} + +void Program::appendCopyConstants(SkTArray* pipeline, + SkArenaAlloc* alloc, + float* dst, + const float* src, + int numSlots) const { + this->appendCopy(pipeline, alloc, + ProgramOp::copy_constant, + dst, /*dstStride=*/SkOpts::raster_pipeline_highp_stride, + src, /*srcStride=*/1, + numSlots); +} + +void Program::appendSingleSlotUnaryOp(SkTArray* pipeline, ProgramOp stage, + float* dst, int numSlots) const { + SkASSERT(numSlots >= 0); + while (numSlots--) { + pipeline->push_back({stage, dst}); + dst += SkOpts::raster_pipeline_highp_stride; + } +} + +void Program::appendMultiSlotUnaryOp(SkTArray* pipeline, ProgramOp baseStage, + float* dst, int numSlots) const { + SkASSERT(numSlots >= 0); + while (numSlots > 4) { + this->appendMultiSlotUnaryOp(pipeline, baseStage, dst, /*numSlots=*/4); + dst += 4 * SkOpts::raster_pipeline_highp_stride; + numSlots -= 4; + } + + SkASSERT(numSlots <= 4); + auto stage = (ProgramOp)((int)baseStage + numSlots - 1); + pipeline->push_back({stage, dst}); +} + +void Program::appendAdjacentNWayBinaryOp(SkTArray* pipeline, SkArenaAlloc* alloc, + ProgramOp stage, + float* dst, const float* src, int numSlots) const { + // The source and destination must be directly next to one another. + SkASSERT(numSlots >= 0); + SkASSERT((dst + SkOpts::raster_pipeline_highp_stride * numSlots) == src); + + if (numSlots > 0) { + auto ctx = alloc->make(); + ctx->dst = dst; + ctx->src = src; + pipeline->push_back({stage, ctx}); + } +} + +void Program::appendAdjacentMultiSlotBinaryOp(SkTArray* pipeline, SkArenaAlloc* alloc, + ProgramOp baseStage, + float* dst, const float* src, int numSlots) const { + // The source and destination must be directly next to one another. + SkASSERT(numSlots >= 0); + SkASSERT((dst + SkOpts::raster_pipeline_highp_stride * numSlots) == src); + + if (numSlots > 4) { + this->appendAdjacentNWayBinaryOp(pipeline, alloc, baseStage, dst, src, numSlots); + return; + } + if (numSlots > 0) { + auto specializedStage = (ProgramOp)((int)baseStage + numSlots); + pipeline->push_back({specializedStage, dst}); + } +} + +void Program::appendAdjacentNWayTernaryOp(SkTArray* pipeline, SkArenaAlloc* alloc, + ProgramOp stage, float* dst, const float* src0, + const float* src1, int numSlots) const { + // The float pointers must all be immediately adjacent to each other. + SkASSERT(numSlots >= 0); + SkASSERT((dst + SkOpts::raster_pipeline_highp_stride * numSlots) == src0); + SkASSERT((src0 + SkOpts::raster_pipeline_highp_stride * numSlots) == src1); + + if (numSlots > 0) { + auto ctx = alloc->make(); + ctx->dst = dst; + ctx->src0 = src0; + ctx->src1 = src1; + pipeline->push_back({stage, ctx}); + } +} + +void Program::appendAdjacentMultiSlotTernaryOp(SkTArray* pipeline, SkArenaAlloc* alloc, + ProgramOp baseStage, float* dst, const float* src0, + const float* src1, int numSlots) const { + // The float pointers must all be immediately adjacent to each other. + SkASSERT(numSlots >= 0); + SkASSERT((dst + SkOpts::raster_pipeline_highp_stride * numSlots) == src0); + SkASSERT((src0 + SkOpts::raster_pipeline_highp_stride * numSlots) == src1); + + if (numSlots > 4) { + this->appendAdjacentNWayTernaryOp(pipeline, alloc, baseStage, dst, src0, src1, numSlots); + return; + } + if (numSlots > 0) { + auto specializedStage = (ProgramOp)((int)baseStage + numSlots); + pipeline->push_back({specializedStage, dst}); + } +} + +void Program::appendStackRewind(SkTArray* pipeline) const { +#if defined(SKSL_STANDALONE) || !SK_HAS_MUSTTAIL + pipeline->push_back({ProgramOp::stack_rewind, nullptr}); +#endif +} + +static void* context_bit_pun(intptr_t val) { + return sk_bit_cast(val); +} + +Program::SlotData Program::allocateSlotData(SkArenaAlloc* alloc) const { + // Allocate a contiguous slab of slot data for values and stack entries. + const int N = SkOpts::raster_pipeline_highp_stride; + const int vectorWidth = N * sizeof(float); + const int allocSize = vectorWidth * (fNumValueSlots + fNumTempStackSlots); + float* slotPtr = static_cast(alloc->makeBytesAlignedTo(allocSize, vectorWidth)); + sk_bzero(slotPtr, allocSize); + + // Store the temp stack immediately after the values. + SlotData s; + s.values = SkSpan(slotPtr, N * fNumValueSlots); + s.stack = SkSpan(s.values.end(), N * fNumTempStackSlots); + return s; +} + +#if !defined(SKSL_STANDALONE) + +bool Program::appendStages(SkRasterPipeline* pipeline, + SkArenaAlloc* alloc, + RP::Callbacks* callbacks, + SkSpan uniforms) const { + // Convert our Instruction list to an array of ProgramOps. + SkTArray stages; + this->makeStages(&stages, alloc, uniforms, this->allocateSlotData(alloc)); + + // Allocate buffers for branch targets and labels; these are needed to convert labels into + // actual offsets into the pipeline and fix up branches. + SkTArray branchContexts; + branchContexts.reserve_back(fNumLabels); + SkTArray labelOffsets; + labelOffsets.push_back_n(fNumLabels, -1); + SkTArray branchGoesToLabel; + branchGoesToLabel.reserve_back(fNumLabels); + + for (const Stage& stage : stages) { + switch (stage.op) { + case ProgramOp::stack_rewind: + pipeline->append_stack_rewind(); + break; + + case ProgramOp::invoke_shader: + if (!callbacks || !callbacks->appendShader(sk_bit_cast(stage.ctx))) { + return false; + } + break; + + case ProgramOp::invoke_color_filter: + if (!callbacks || !callbacks->appendColorFilter(sk_bit_cast(stage.ctx))) { + return false; + } + break; + + case ProgramOp::invoke_blender: + if (!callbacks || !callbacks->appendBlender(sk_bit_cast(stage.ctx))) { + return false; + } + break; + + case ProgramOp::invoke_to_linear_srgb: + if (!callbacks) { + return false; + } + callbacks->toLinearSrgb(); + break; + + case ProgramOp::invoke_from_linear_srgb: + if (!callbacks) { + return false; + } + callbacks->fromLinearSrgb(); + break; + + case ProgramOp::label: { + // Remember the absolute pipeline position of this label. + int labelID = sk_bit_cast(stage.ctx); + SkASSERT(labelID >= 0 && labelID < fNumLabels); + labelOffsets[labelID] = pipeline->getNumStages(); + break; + } + case ProgramOp::jump: + case ProgramOp::branch_if_all_lanes_active: + case ProgramOp::branch_if_any_lanes_active: + case ProgramOp::branch_if_no_lanes_active: + case ProgramOp::branch_if_no_active_lanes_eq: { + // The branch context contain a valid label ID at this point. + auto* branchCtx = static_cast(stage.ctx); + int labelID = branchCtx->offset; + SkASSERT(labelID >= 0 && labelID < fNumLabels); + + // Replace the label ID in the branch context with the absolute pipeline position. + // We will go back over the branch targets at the end and fix them up. + branchCtx->offset = pipeline->getNumStages(); + + SkASSERT(branchContexts.size() == branchGoesToLabel.size()); + branchContexts.push_back(branchCtx); + branchGoesToLabel.push_back(labelID); + [[fallthrough]]; + } + default: + // Append a regular op to the program. + SkASSERT((int)stage.op < kNumRasterPipelineHighpOps); + pipeline->append((SkRasterPipelineOp)stage.op, stage.ctx); + break; + } + } + + // Now that we have assembled the program and know the pipeline positions of each label and + // branch, fix up every branch target. + SkASSERT(branchContexts.size() == branchGoesToLabel.size()); + for (int index = 0; index < branchContexts.size(); ++index) { + int branchFromIdx = branchContexts[index]->offset; + int branchToIdx = labelOffsets[branchGoesToLabel[index]]; + branchContexts[index]->offset = branchToIdx - branchFromIdx; + } + + return true; +} + +#endif + +void Program::makeStages(SkTArray* pipeline, + SkArenaAlloc* alloc, + SkSpan uniforms, + const SlotData& slots) const { + SkASSERT(fNumUniformSlots == SkToInt(uniforms.size())); + + const int N = SkOpts::raster_pipeline_highp_stride; + StackDepthMap tempStackDepth; + int currentStack = 0; + int mostRecentRewind = 0; + + // Assemble a map holding the current stack-top for each temporary stack. Position each temp + // stack immediately after the previous temp stack; temp stacks are never allowed to overlap. + int pos = 0; + SkTHashMap tempStackMap; + for (auto& [idx, depth] : fTempStackMaxDepths) { + tempStackMap[idx] = slots.stack.begin() + (pos * N); + pos += depth; + } + + // Track labels that we have reached in processing. + SkBitSet labelsEncountered(fNumLabels); + + auto EmitStackRewindForBackwardsBranch = [&](int labelID) { + // If we have already encountered the label associated with this branch, this is a + // backwards branch. Add a stack-rewind immediately before the branch to ensure that + // long-running loops don't use an unbounded amount of stack space. + if (labelsEncountered.test(labelID)) { + this->appendStackRewind(pipeline); + mostRecentRewind = pipeline->size(); + } + }; + + // We can reuse constants from our arena by placing them in this map. + SkTHashMap constantLookupMap; // + + // Write each BuilderOp to the pipeline array. + pipeline->reserve_back(fInstructions.size()); + for (const Instruction& inst : fInstructions) { + auto SlotA = [&]() { return &slots.values[N * inst.fSlotA]; }; + auto SlotB = [&]() { return &slots.values[N * inst.fSlotB]; }; + auto UniformA = [&]() { return &uniforms[inst.fSlotA]; }; + float*& tempStackPtr = tempStackMap[currentStack]; + + switch (inst.fOp) { + case BuilderOp::label: + SkASSERT(inst.fImmA >= 0 && inst.fImmA < fNumLabels); + labelsEncountered.set(inst.fImmA); + pipeline->push_back({ProgramOp::label, context_bit_pun(inst.fImmA)}); + break; + + case BuilderOp::jump: + case BuilderOp::branch_if_all_lanes_active: + case BuilderOp::branch_if_any_lanes_active: + case BuilderOp::branch_if_no_lanes_active: { + SkASSERT(inst.fImmA >= 0 && inst.fImmA < fNumLabels); + EmitStackRewindForBackwardsBranch(inst.fImmA); + + auto* ctx = alloc->make(); + ctx->offset = inst.fImmA; + pipeline->push_back({(ProgramOp)inst.fOp, ctx}); + break; + } + case BuilderOp::branch_if_no_active_lanes_on_stack_top_equal: { + SkASSERT(inst.fImmA >= 0 && inst.fImmA < fNumLabels); + EmitStackRewindForBackwardsBranch(inst.fImmA); + + auto* ctx = alloc->make(); + ctx->offset = inst.fImmA; + ctx->value = inst.fImmB; + ctx->ptr = reinterpret_cast(tempStackPtr - N); + pipeline->push_back({ProgramOp::branch_if_no_active_lanes_eq, ctx}); + break; + } + case BuilderOp::init_lane_masks: + pipeline->push_back({ProgramOp::init_lane_masks, nullptr}); + break; + + case BuilderOp::store_src_rg: + pipeline->push_back({ProgramOp::store_src_rg, SlotA()}); + break; + + case BuilderOp::store_src: + pipeline->push_back({ProgramOp::store_src, SlotA()}); + break; + + case BuilderOp::store_dst: + pipeline->push_back({ProgramOp::store_dst, SlotA()}); + break; + + case BuilderOp::store_device_xy01: + pipeline->push_back({ProgramOp::store_device_xy01, SlotA()}); + break; + + case BuilderOp::load_src: + pipeline->push_back({ProgramOp::load_src, SlotA()}); + break; + + case BuilderOp::load_dst: + pipeline->push_back({ProgramOp::load_dst, SlotA()}); + break; + + case ALL_SINGLE_SLOT_UNARY_OP_CASES: { + float* dst = tempStackPtr - (inst.fImmA * N); + this->appendSingleSlotUnaryOp(pipeline, (ProgramOp)inst.fOp, dst, inst.fImmA); + break; + } + case ALL_MULTI_SLOT_UNARY_OP_CASES: { + float* dst = tempStackPtr - (inst.fImmA * N); + this->appendMultiSlotUnaryOp(pipeline, (ProgramOp)inst.fOp, dst, inst.fImmA); + break; + } + case ALL_N_WAY_BINARY_OP_CASES: { + float* src = tempStackPtr - (inst.fImmA * N); + float* dst = tempStackPtr - (inst.fImmA * 2 * N); + this->appendAdjacentNWayBinaryOp(pipeline, alloc, (ProgramOp)inst.fOp, + dst, src, inst.fImmA); + break; + } + case ALL_MULTI_SLOT_BINARY_OP_CASES: { + float* src = tempStackPtr - (inst.fImmA * N); + float* dst = tempStackPtr - (inst.fImmA * 2 * N); + this->appendAdjacentMultiSlotBinaryOp(pipeline, alloc, (ProgramOp)inst.fOp, + dst, src, inst.fImmA); + break; + } + case ALL_N_WAY_TERNARY_OP_CASES: { + float* src1 = tempStackPtr - (inst.fImmA * N); + float* src0 = tempStackPtr - (inst.fImmA * 2 * N); + float* dst = tempStackPtr - (inst.fImmA * 3 * N); + this->appendAdjacentNWayTernaryOp(pipeline, alloc, (ProgramOp)inst.fOp, + dst, src0, src1, inst.fImmA); + break; + } + case ALL_MULTI_SLOT_TERNARY_OP_CASES: { + float* src1 = tempStackPtr - (inst.fImmA * N); + float* src0 = tempStackPtr - (inst.fImmA * 2 * N); + float* dst = tempStackPtr - (inst.fImmA * 3 * N); + this->appendAdjacentMultiSlotTernaryOp(pipeline, alloc, (ProgramOp)inst.fOp, + dst, src0, src1, inst.fImmA); + break; + } + case BuilderOp::select: { + float* src = tempStackPtr - (inst.fImmA * N); + float* dst = tempStackPtr - (inst.fImmA * 2 * N); + this->appendCopySlotsMasked(pipeline, alloc, dst, src, inst.fImmA); + break; + } + case BuilderOp::copy_slot_masked: + this->appendCopySlotsMasked(pipeline, alloc, SlotA(), SlotB(), inst.fImmA); + break; + + case BuilderOp::copy_slot_unmasked: + this->appendCopySlotsUnmasked(pipeline, alloc, SlotA(), SlotB(), inst.fImmA); + break; + + case BuilderOp::zero_slot_unmasked: + this->appendMultiSlotUnaryOp(pipeline, ProgramOp::zero_slot_unmasked, + SlotA(), inst.fImmA); + break; + + case BuilderOp::refract_4_floats: { + float* dst = tempStackPtr - (9 * N); + pipeline->push_back({ProgramOp::refract_4_floats, dst}); + break; + } + case BuilderOp::inverse_mat2: + case BuilderOp::inverse_mat3: + case BuilderOp::inverse_mat4: { + float* dst = tempStackPtr - (inst.fImmA * N); + pipeline->push_back({(ProgramOp)inst.fOp, dst}); + break; + } + case BuilderOp::dot_2_floats: + case BuilderOp::dot_3_floats: + case BuilderOp::dot_4_floats: { + float* dst = tempStackPtr - (inst.fImmA * 2 * N); + pipeline->push_back({(ProgramOp)inst.fOp, dst}); + break; + } + case BuilderOp::swizzle_1: + case BuilderOp::swizzle_2: + case BuilderOp::swizzle_3: + case BuilderOp::swizzle_4: { + auto* ctx = alloc->make(); + ctx->ptr = tempStackPtr - (N * inst.fImmA); + // Unpack component nybbles into byte-offsets pointing at stack slots. + unpack_nybbles_to_offsets(inst.fImmB, SkSpan(ctx->offsets)); + pipeline->push_back({(ProgramOp)inst.fOp, ctx}); + break; + } + case BuilderOp::shuffle: { + int consumed = inst.fImmA >> 16; + int generated = inst.fImmA & 0xFFFF; + + auto* ctx = alloc->make(); + ctx->ptr = tempStackPtr - (N * consumed); + ctx->count = generated; + // Unpack immB and immC from nybble form into the offset array. + unpack_nybbles_to_offsets(inst.fImmB, SkSpan(&ctx->offsets[0], 8)); + unpack_nybbles_to_offsets(inst.fImmC, SkSpan(&ctx->offsets[8], 8)); + pipeline->push_back({ProgramOp::shuffle, ctx}); + break; + } + case BuilderOp::push_src_rgba: { + float* dst = tempStackPtr; + pipeline->push_back({ProgramOp::store_src, dst}); + break; + } + case BuilderOp::push_dst_rgba: { + float* dst = tempStackPtr; + pipeline->push_back({ProgramOp::store_dst, dst}); + break; + } + case BuilderOp::pop_src_rg: { + float* src = tempStackPtr - (2 * N); + pipeline->push_back({ProgramOp::load_src_rg, src}); + break; + } + case BuilderOp::pop_src_rgba: { + float* src = tempStackPtr - (4 * N); + pipeline->push_back({ProgramOp::load_src, src}); + break; + } + case BuilderOp::pop_dst_rgba: { + float* src = tempStackPtr - (4 * N); + pipeline->push_back({ProgramOp::load_dst, src}); + break; + } + case BuilderOp::push_slots: { + float* dst = tempStackPtr; + this->appendCopySlotsUnmasked(pipeline, alloc, dst, SlotA(), inst.fImmA); + break; + } + case BuilderOp::copy_stack_to_slots_indirect: + case BuilderOp::push_slots_indirect: + case BuilderOp::push_uniform_indirect: { + // SlotA: fixed-range start + // SlotB: limit-range end + // immA: number of slots to copy + // immB: dynamic stack ID + ProgramOp op; + auto* ctx = alloc->make(); + ctx->indirectOffset = + reinterpret_cast(tempStackMap[inst.fImmB]) - (1 * N); + ctx->indirectLimit = inst.fSlotB - inst.fSlotA - inst.fImmA; + ctx->slots = inst.fImmA; + if (inst.fOp == BuilderOp::push_slots_indirect) { + op = ProgramOp::copy_from_indirect_unmasked; + ctx->src = SlotA(); + ctx->dst = tempStackPtr; + } else if (inst.fOp == BuilderOp::push_uniform_indirect) { + op = ProgramOp::copy_from_indirect_uniform_unmasked; + ctx->src = UniformA(); + ctx->dst = tempStackPtr; + } else { + op = ProgramOp::copy_to_indirect_masked; + ctx->src = tempStackPtr - (ctx->slots * N); + ctx->dst = SlotA(); + } + pipeline->push_back({op, ctx}); + break; + } + case BuilderOp::push_uniform: { + float* dst = tempStackPtr; + this->appendCopyConstants(pipeline, alloc, dst, UniformA(), inst.fImmA); + break; + } + case BuilderOp::push_zeros: { + float* dst = tempStackPtr; + this->appendMultiSlotUnaryOp(pipeline, ProgramOp::zero_slot_unmasked, dst, + inst.fImmA); + break; + } + case BuilderOp::push_condition_mask: { + float* dst = tempStackPtr; + pipeline->push_back({ProgramOp::store_condition_mask, dst}); + break; + } + case BuilderOp::pop_condition_mask: { + float* src = tempStackPtr - (1 * N); + pipeline->push_back({ProgramOp::load_condition_mask, src}); + break; + } + case BuilderOp::merge_condition_mask: { + float* ptr = tempStackPtr - (2 * N); + pipeline->push_back({ProgramOp::merge_condition_mask, ptr}); + break; + } + case BuilderOp::push_loop_mask: { + float* dst = tempStackPtr; + pipeline->push_back({ProgramOp::store_loop_mask, dst}); + break; + } + case BuilderOp::pop_loop_mask: { + float* src = tempStackPtr - (1 * N); + pipeline->push_back({ProgramOp::load_loop_mask, src}); + break; + } + case BuilderOp::pop_and_reenable_loop_mask: { + float* src = tempStackPtr - (1 * N); + pipeline->push_back({ProgramOp::reenable_loop_mask, src}); + break; + } + case BuilderOp::reenable_loop_mask: + pipeline->push_back({ProgramOp::reenable_loop_mask, SlotA()}); + break; + + case BuilderOp::mask_off_loop_mask: + pipeline->push_back({ProgramOp::mask_off_loop_mask, nullptr}); + break; + + case BuilderOp::merge_loop_mask: { + float* src = tempStackPtr - (1 * N); + pipeline->push_back({ProgramOp::merge_loop_mask, src}); + break; + } + case BuilderOp::push_return_mask: { + float* dst = tempStackPtr; + pipeline->push_back({ProgramOp::store_return_mask, dst}); + break; + } + case BuilderOp::pop_return_mask: { + float* src = tempStackPtr - (1 * N); + pipeline->push_back({ProgramOp::load_return_mask, src}); + break; + } + case BuilderOp::mask_off_return_mask: + pipeline->push_back({ProgramOp::mask_off_return_mask, nullptr}); + break; + + case BuilderOp::copy_constant: + case BuilderOp::push_literal: { + float* dst = (inst.fOp == BuilderOp::push_literal) ? tempStackPtr : SlotA(); + int* constantPtr; + if (int** lookup = constantLookupMap.find(inst.fImmA)) { + constantPtr = *lookup; + } else { + constantPtr = alloc->make(inst.fImmA); + constantLookupMap[inst.fImmA] = constantPtr; + } + SkASSERT(constantPtr); + this->appendCopyConstants(pipeline, alloc, dst, (float*)constantPtr,/*numSlots=*/1); + break; + } + case BuilderOp::copy_stack_to_slots: { + float* src = tempStackPtr - (inst.fImmB * N); + this->appendCopySlotsMasked(pipeline, alloc, SlotA(), src, inst.fImmA); + break; + } + case BuilderOp::copy_stack_to_slots_unmasked: { + float* src = tempStackPtr - (inst.fImmB * N); + this->appendCopySlotsUnmasked(pipeline, alloc, SlotA(), src, inst.fImmA); + break; + } + case BuilderOp::swizzle_copy_stack_to_slots: { + // SlotA: fixed-range start + // immA: number of swizzle components + // immB: swizzle components + // immC: offset from stack top + auto stage = (ProgramOp)((int)ProgramOp::swizzle_copy_slot_masked + inst.fImmA - 1); + auto* ctx = alloc->make(); + ctx->src = tempStackPtr - (inst.fImmC * N); + ctx->dst = SlotA(); + unpack_nybbles_to_offsets(inst.fImmB, SkSpan(ctx->offsets)); + pipeline->push_back({stage, ctx}); + break; + } + case BuilderOp::push_clone: { + float* src = tempStackPtr - (inst.fImmB * N); + float* dst = tempStackPtr; + this->appendCopySlotsUnmasked(pipeline, alloc, dst, src, inst.fImmA); + break; + } + case BuilderOp::push_clone_from_stack: { + // immA: number of slots + // immB: other stack ID + // immC: offset from stack top + float* sourceStackPtr = tempStackMap[inst.fImmB]; + float* src = sourceStackPtr - (inst.fImmC * N); + float* dst = tempStackPtr; + this->appendCopySlotsUnmasked(pipeline, alloc, dst, src, inst.fImmA); + break; + } + case BuilderOp::push_clone_indirect_from_stack: { + // immA: number of slots + // immB: other stack ID + // immC: offset from stack top + // immD: dynamic stack ID + float* sourceStackPtr = tempStackMap[inst.fImmB]; + + auto* ctx = alloc->make(); + ctx->dst = tempStackPtr; + ctx->src = sourceStackPtr - (inst.fImmC * N); + ctx->indirectOffset = + reinterpret_cast(tempStackMap[inst.fImmD]) - (1 * N); + ctx->indirectLimit = inst.fImmC - inst.fImmA; + ctx->slots = inst.fImmA; + pipeline->push_back({ProgramOp::copy_from_indirect_unmasked, ctx}); + break; + } + case BuilderOp::swizzle_copy_stack_to_slots_indirect: { + // SlotA: fixed-range start + // SlotB: limit-range end + // immA: number of swizzle components + // immB: swizzle components + // immC: offset from stack top + // immD: dynamic stack ID + auto* ctx = alloc->make(); + ctx->src = tempStackPtr - (inst.fImmC * N); + ctx->dst = SlotA(); + ctx->indirectOffset = + reinterpret_cast(tempStackMap[inst.fImmD]) - (1 * N); + ctx->indirectLimit = + inst.fSlotB - inst.fSlotA - (max_packed_nybble(inst.fImmB, inst.fImmA) + 1); + ctx->slots = inst.fImmA; + unpack_nybbles_to_offsets(inst.fImmB, SkSpan(ctx->offsets)); + pipeline->push_back({ProgramOp::swizzle_copy_to_indirect_masked, ctx}); + break; + } + case BuilderOp::case_op: { + auto* ctx = alloc->make(); + ctx->ptr = reinterpret_cast(tempStackPtr - 2 * N); + ctx->expectedValue = inst.fImmA; + pipeline->push_back({ProgramOp::case_op, ctx}); + break; + } + case BuilderOp::discard_stack: + break; + + case BuilderOp::set_current_stack: + currentStack = inst.fImmA; + break; + + case BuilderOp::invoke_shader: + case BuilderOp::invoke_color_filter: + case BuilderOp::invoke_blender: + pipeline->push_back({(ProgramOp)inst.fOp, context_bit_pun(inst.fImmA)}); + break; + + case BuilderOp::invoke_to_linear_srgb: + case BuilderOp::invoke_from_linear_srgb: + pipeline->push_back({(ProgramOp)inst.fOp, nullptr}); + break; + + default: + SkDEBUGFAILF("Raster Pipeline: unsupported instruction %d", (int)inst.fOp); + break; + } + + tempStackPtr += stack_usage(inst) * N; + SkASSERT(tempStackPtr >= slots.stack.begin()); + SkASSERT(tempStackPtr <= slots.stack.end()); + + // Periodically rewind the stack every 500 instructions. When SK_HAS_MUSTTAIL is set, + // rewinds are not actually used; the appendStackRewind call becomes a no-op. On platforms + // that don't support SK_HAS_MUSTTAIL, rewinding the stack periodically can prevent a + // potential stack overflow when running a long program. + int numPipelineStages = pipeline->size(); + if (numPipelineStages - mostRecentRewind > 500) { + this->appendStackRewind(pipeline); + mostRecentRewind = numPipelineStages; + } + } +} + +// Finds duplicate names in the program and disambiguates them with subscripts. +SkTArray build_unique_slot_name_list(const SkRPDebugTrace* debugTrace) { + SkTArray slotName; + if (debugTrace) { + slotName.reserve_back(debugTrace->fSlotInfo.size()); + + // The map consists of >. + SkTHashMap> uniqueNameMap; + + for (const SlotDebugInfo& slotInfo : debugTrace->fSlotInfo) { + // Look up this variable by its name and source position. + int pos = slotInfo.pos.valid() ? slotInfo.pos.startOffset() : 0; + SkTHashMap& positionMap = uniqueNameMap[slotInfo.name]; + std::string& uniqueName = positionMap[pos]; + + // Have we seen this variable name/position combination before? + if (uniqueName.empty()) { + // This is a unique name/position pair. + uniqueName = slotInfo.name; + + // But if it's not a unique _name_, it deserves a subscript to disambiguate it. + int subscript = positionMap.count() - 1; + if (subscript > 0) { + for (char digit : std::to_string(subscript)) { + // U+2080 through U+2089 (₀₁₂₃₄₅₆₇₈₉) in UTF8: + uniqueName.push_back((char)0xE2); + uniqueName.push_back((char)0x82); + uniqueName.push_back((char)(0x80 + digit - '0')); + } + } + } + + slotName.push_back(uniqueName); + } + } + return slotName; +} + +void Program::dump(SkWStream* out) const { + // Allocate memory for the slot and uniform data, even though the program won't ever be + // executed. The program requires pointer ranges for managing its data, and ASAN will report + // errors if those pointers are pointing at unallocated memory. + SkArenaAlloc alloc(/*firstHeapAllocation=*/1000); + const int N = SkOpts::raster_pipeline_highp_stride; + SlotData slots = this->allocateSlotData(&alloc); + float* uniformPtr = alloc.makeArray(fNumUniformSlots); + SkSpan uniforms = SkSpan(uniformPtr, fNumUniformSlots); + + // Turn this program into an array of Raster Pipeline stages. + SkTArray stages; + this->makeStages(&stages, &alloc, uniforms, slots); + + // Find the labels in the program, and keep track of their offsets. + SkTHashMap labelToStageMap; //